10a708f8fSGustavo F. Padovan /* 20a708f8fSGustavo F. Padovan BlueZ - Bluetooth protocol stack for Linux 30a708f8fSGustavo F. Padovan Copyright (C) 2000-2001 Qualcomm Incorporated 40a708f8fSGustavo F. Padovan Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> 50a708f8fSGustavo F. Padovan Copyright (C) 2010 Google Inc. 6590051deSGustavo F. Padovan Copyright (C) 2011 ProFUSION Embedded Systems 7422e925bSMat Martineau Copyright (c) 2012 Code Aurora Forum. All rights reserved. 80a708f8fSGustavo F. Padovan 90a708f8fSGustavo F. Padovan Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> 100a708f8fSGustavo F. Padovan 110a708f8fSGustavo F. Padovan This program is free software; you can redistribute it and/or modify 120a708f8fSGustavo F. Padovan it under the terms of the GNU General Public License version 2 as 130a708f8fSGustavo F. Padovan published by the Free Software Foundation; 140a708f8fSGustavo F. Padovan 150a708f8fSGustavo F. Padovan THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 160a708f8fSGustavo F. Padovan OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 170a708f8fSGustavo F. Padovan FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 180a708f8fSGustavo F. Padovan IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 190a708f8fSGustavo F. Padovan CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 200a708f8fSGustavo F. Padovan WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 210a708f8fSGustavo F. Padovan ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 220a708f8fSGustavo F. Padovan OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 230a708f8fSGustavo F. Padovan 240a708f8fSGustavo F. Padovan ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 250a708f8fSGustavo F. Padovan COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 260a708f8fSGustavo F. Padovan SOFTWARE IS DISCLAIMED. 270a708f8fSGustavo F. Padovan */ 280a708f8fSGustavo F. Padovan 29bb58f747SGustavo F. Padovan /* Bluetooth L2CAP core. */ 300a708f8fSGustavo F. Padovan 310a708f8fSGustavo F. Padovan #include <linux/module.h> 320a708f8fSGustavo F. Padovan 330a708f8fSGustavo F. Padovan #include <linux/debugfs.h> 340a708f8fSGustavo F. Padovan #include <linux/crc16.h> 350a708f8fSGustavo F. Padovan 360a708f8fSGustavo F. Padovan #include <net/bluetooth/bluetooth.h> 370a708f8fSGustavo F. Padovan #include <net/bluetooth/hci_core.h> 380a708f8fSGustavo F. Padovan #include <net/bluetooth/l2cap.h> 39b501d6a1SAnderson Briglia #include <net/bluetooth/smp.h> 4097e8e89dSAndrei Emeltchenko #include <net/bluetooth/a2mp.h> 415ce66b59SAndrei Emeltchenko #include <net/bluetooth/amp.h> 420a708f8fSGustavo F. Padovan 43d1de6d46SMat Martineau bool disable_ertm; 440a708f8fSGustavo F. Padovan 450a708f8fSGustavo F. Padovan static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; 4650a147cdSMat Martineau static u8 l2cap_fixed_chan[8] = { L2CAP_FC_L2CAP, }; 470a708f8fSGustavo F. Padovan 48b5ad8b7fSJohannes Berg static LIST_HEAD(chan_list); 49b5ad8b7fSJohannes Berg static DEFINE_RWLOCK(chan_list_lock); 500a708f8fSGustavo F. Padovan 510a708f8fSGustavo F. Padovan static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, 520a708f8fSGustavo F. Padovan u8 code, u8 ident, u16 dlen, void *data); 534519de9aSGustavo F. Padovan static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, 544519de9aSGustavo F. Padovan void *data); 55710f9b0aSGustavo F. Padovan static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data); 565e4e3972SAndrei Emeltchenko static void l2cap_send_disconn_req(struct l2cap_chan *chan, int err); 570a708f8fSGustavo F. Padovan 58d660366dSGustavo Padovan static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control, 59608bcc6dSMat Martineau struct sk_buff_head *skbs, u8 event); 60608bcc6dSMat Martineau 610a708f8fSGustavo F. Padovan /* ---- L2CAP channels ---- */ 6271ba0e56SGustavo F. Padovan 632d792818SGustavo Padovan static struct l2cap_chan *__l2cap_get_chan_by_dcid(struct l2cap_conn *conn, 642d792818SGustavo Padovan u16 cid) 650a708f8fSGustavo F. Padovan { 663df91ea2SAndrei Emeltchenko struct l2cap_chan *c; 67baa7e1faSGustavo F. Padovan 683df91ea2SAndrei Emeltchenko list_for_each_entry(c, &conn->chan_l, list) { 693df91ea2SAndrei Emeltchenko if (c->dcid == cid) 703df91ea2SAndrei Emeltchenko return c; 710a708f8fSGustavo F. Padovan } 723df91ea2SAndrei Emeltchenko return NULL; 73baa7e1faSGustavo F. Padovan } 740a708f8fSGustavo F. Padovan 752d792818SGustavo Padovan static struct l2cap_chan *__l2cap_get_chan_by_scid(struct l2cap_conn *conn, 762d792818SGustavo Padovan u16 cid) 770a708f8fSGustavo F. Padovan { 783df91ea2SAndrei Emeltchenko struct l2cap_chan *c; 79baa7e1faSGustavo F. Padovan 803df91ea2SAndrei Emeltchenko list_for_each_entry(c, &conn->chan_l, list) { 813df91ea2SAndrei Emeltchenko if (c->scid == cid) 823df91ea2SAndrei Emeltchenko return c; 830a708f8fSGustavo F. Padovan } 843df91ea2SAndrei Emeltchenko return NULL; 85baa7e1faSGustavo F. Padovan } 860a708f8fSGustavo F. Padovan 870a708f8fSGustavo F. Padovan /* Find channel with given SCID. 88ef191adeSMat Martineau * Returns locked channel. */ 892d792818SGustavo Padovan static struct l2cap_chan *l2cap_get_chan_by_scid(struct l2cap_conn *conn, 902d792818SGustavo Padovan u16 cid) 910a708f8fSGustavo F. Padovan { 9248454079SGustavo F. Padovan struct l2cap_chan *c; 93baa7e1faSGustavo F. Padovan 943df91ea2SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 95baa7e1faSGustavo F. Padovan c = __l2cap_get_chan_by_scid(conn, cid); 96ef191adeSMat Martineau if (c) 97ef191adeSMat Martineau l2cap_chan_lock(c); 983df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 993df91ea2SAndrei Emeltchenko 10048454079SGustavo F. Padovan return c; 1010a708f8fSGustavo F. Padovan } 1020a708f8fSGustavo F. Padovan 103b1a130b7SMat Martineau /* Find channel with given DCID. 104b1a130b7SMat Martineau * Returns locked channel. 105b1a130b7SMat Martineau */ 106b1a130b7SMat Martineau static struct l2cap_chan *l2cap_get_chan_by_dcid(struct l2cap_conn *conn, 107b1a130b7SMat Martineau u16 cid) 108b1a130b7SMat Martineau { 109b1a130b7SMat Martineau struct l2cap_chan *c; 110b1a130b7SMat Martineau 111b1a130b7SMat Martineau mutex_lock(&conn->chan_lock); 112b1a130b7SMat Martineau c = __l2cap_get_chan_by_dcid(conn, cid); 113b1a130b7SMat Martineau if (c) 114b1a130b7SMat Martineau l2cap_chan_lock(c); 115b1a130b7SMat Martineau mutex_unlock(&conn->chan_lock); 116b1a130b7SMat Martineau 117b1a130b7SMat Martineau return c; 118b1a130b7SMat Martineau } 119b1a130b7SMat Martineau 1202d792818SGustavo Padovan static struct l2cap_chan *__l2cap_get_chan_by_ident(struct l2cap_conn *conn, 1212d792818SGustavo Padovan u8 ident) 1220a708f8fSGustavo F. Padovan { 1233df91ea2SAndrei Emeltchenko struct l2cap_chan *c; 124baa7e1faSGustavo F. Padovan 1253df91ea2SAndrei Emeltchenko list_for_each_entry(c, &conn->chan_l, list) { 1263df91ea2SAndrei Emeltchenko if (c->ident == ident) 1273df91ea2SAndrei Emeltchenko return c; 1280a708f8fSGustavo F. Padovan } 1293df91ea2SAndrei Emeltchenko return NULL; 130baa7e1faSGustavo F. Padovan } 1310a708f8fSGustavo F. Padovan 1325b155ef9SMat Martineau static struct l2cap_chan *l2cap_get_chan_by_ident(struct l2cap_conn *conn, 1335b155ef9SMat Martineau u8 ident) 1345b155ef9SMat Martineau { 1355b155ef9SMat Martineau struct l2cap_chan *c; 1365b155ef9SMat Martineau 1375b155ef9SMat Martineau mutex_lock(&conn->chan_lock); 1385b155ef9SMat Martineau c = __l2cap_get_chan_by_ident(conn, ident); 1395b155ef9SMat Martineau if (c) 1405b155ef9SMat Martineau l2cap_chan_lock(c); 1415b155ef9SMat Martineau mutex_unlock(&conn->chan_lock); 1425b155ef9SMat Martineau 1435b155ef9SMat Martineau return c; 1445b155ef9SMat Martineau } 1455b155ef9SMat Martineau 14623691d75SGustavo F. Padovan static struct l2cap_chan *__l2cap_global_chan_by_addr(__le16 psm, bdaddr_t *src) 1479e4425ffSGustavo F. Padovan { 14823691d75SGustavo F. Padovan struct l2cap_chan *c; 1499e4425ffSGustavo F. Padovan 15023691d75SGustavo F. Padovan list_for_each_entry(c, &chan_list, global_l) { 15123691d75SGustavo F. Padovan if (c->sport == psm && !bacmp(&bt_sk(c->sk)->src, src)) 15223691d75SGustavo F. Padovan return c; 1539e4425ffSGustavo F. Padovan } 154250938cbSSzymon Janc return NULL; 155250938cbSSzymon Janc } 1569e4425ffSGustavo F. Padovan 1579e4425ffSGustavo F. Padovan int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm) 1589e4425ffSGustavo F. Padovan { 15973b2ec18SGustavo F. Padovan int err; 16073b2ec18SGustavo F. Padovan 161333055f2SGustavo F. Padovan write_lock(&chan_list_lock); 1629e4425ffSGustavo F. Padovan 16323691d75SGustavo F. Padovan if (psm && __l2cap_global_chan_by_addr(psm, src)) { 16473b2ec18SGustavo F. Padovan err = -EADDRINUSE; 16573b2ec18SGustavo F. Padovan goto done; 1669e4425ffSGustavo F. Padovan } 1679e4425ffSGustavo F. Padovan 16873b2ec18SGustavo F. Padovan if (psm) { 1699e4425ffSGustavo F. Padovan chan->psm = psm; 1709e4425ffSGustavo F. Padovan chan->sport = psm; 17173b2ec18SGustavo F. Padovan err = 0; 17273b2ec18SGustavo F. Padovan } else { 17373b2ec18SGustavo F. Padovan u16 p; 1749e4425ffSGustavo F. Padovan 17573b2ec18SGustavo F. Padovan err = -EINVAL; 17673b2ec18SGustavo F. Padovan for (p = 0x1001; p < 0x1100; p += 2) 17723691d75SGustavo F. Padovan if (!__l2cap_global_chan_by_addr(cpu_to_le16(p), src)) { 17873b2ec18SGustavo F. Padovan chan->psm = cpu_to_le16(p); 17973b2ec18SGustavo F. Padovan chan->sport = cpu_to_le16(p); 18073b2ec18SGustavo F. Padovan err = 0; 18173b2ec18SGustavo F. Padovan break; 18273b2ec18SGustavo F. Padovan } 18373b2ec18SGustavo F. Padovan } 18473b2ec18SGustavo F. Padovan 18573b2ec18SGustavo F. Padovan done: 186333055f2SGustavo F. Padovan write_unlock(&chan_list_lock); 18773b2ec18SGustavo F. Padovan return err; 1889e4425ffSGustavo F. Padovan } 1899e4425ffSGustavo F. Padovan 1909e4425ffSGustavo F. Padovan int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid) 1919e4425ffSGustavo F. Padovan { 192333055f2SGustavo F. Padovan write_lock(&chan_list_lock); 1939e4425ffSGustavo F. Padovan 1949e4425ffSGustavo F. Padovan chan->scid = scid; 1959e4425ffSGustavo F. Padovan 196333055f2SGustavo F. Padovan write_unlock(&chan_list_lock); 1979e4425ffSGustavo F. Padovan 1989e4425ffSGustavo F. Padovan return 0; 1999e4425ffSGustavo F. Padovan } 2009e4425ffSGustavo F. Padovan 201baa7e1faSGustavo F. Padovan static u16 l2cap_alloc_cid(struct l2cap_conn *conn) 2020a708f8fSGustavo F. Padovan { 2030a708f8fSGustavo F. Padovan u16 cid = L2CAP_CID_DYN_START; 2040a708f8fSGustavo F. Padovan 2050a708f8fSGustavo F. Padovan for (; cid < L2CAP_CID_DYN_END; cid++) { 206baa7e1faSGustavo F. Padovan if (!__l2cap_get_chan_by_scid(conn, cid)) 2070a708f8fSGustavo F. Padovan return cid; 2080a708f8fSGustavo F. Padovan } 2090a708f8fSGustavo F. Padovan 2100a708f8fSGustavo F. Padovan return 0; 2110a708f8fSGustavo F. Padovan } 2120a708f8fSGustavo F. Padovan 2130e587be7SAndrei Emeltchenko static void __l2cap_state_change(struct l2cap_chan *chan, int state) 21489bc500eSGustavo F. Padovan { 21542d2d87cSAndrei Emeltchenko BT_DBG("chan %p %s -> %s", chan, state_to_string(chan->state), 216badaaa00SGustavo F. Padovan state_to_string(state)); 217badaaa00SGustavo F. Padovan 21889bc500eSGustavo F. Padovan chan->state = state; 21980b98027SGustavo Padovan chan->ops->state_change(chan, state); 22089bc500eSGustavo F. Padovan } 22189bc500eSGustavo F. Padovan 2220e587be7SAndrei Emeltchenko static void l2cap_state_change(struct l2cap_chan *chan, int state) 2230e587be7SAndrei Emeltchenko { 2240e587be7SAndrei Emeltchenko struct sock *sk = chan->sk; 2250e587be7SAndrei Emeltchenko 2260e587be7SAndrei Emeltchenko lock_sock(sk); 2270e587be7SAndrei Emeltchenko __l2cap_state_change(chan, state); 2280e587be7SAndrei Emeltchenko release_sock(sk); 2290e587be7SAndrei Emeltchenko } 2300e587be7SAndrei Emeltchenko 2312e0052e4SAndrei Emeltchenko static inline void __l2cap_chan_set_err(struct l2cap_chan *chan, int err) 2322e0052e4SAndrei Emeltchenko { 2332e0052e4SAndrei Emeltchenko struct sock *sk = chan->sk; 2342e0052e4SAndrei Emeltchenko 2352e0052e4SAndrei Emeltchenko sk->sk_err = err; 2362e0052e4SAndrei Emeltchenko } 2372e0052e4SAndrei Emeltchenko 2382e0052e4SAndrei Emeltchenko static inline void l2cap_chan_set_err(struct l2cap_chan *chan, int err) 2392e0052e4SAndrei Emeltchenko { 2402e0052e4SAndrei Emeltchenko struct sock *sk = chan->sk; 2412e0052e4SAndrei Emeltchenko 2422e0052e4SAndrei Emeltchenko lock_sock(sk); 2432e0052e4SAndrei Emeltchenko __l2cap_chan_set_err(chan, err); 2442e0052e4SAndrei Emeltchenko release_sock(sk); 2452e0052e4SAndrei Emeltchenko } 2462e0052e4SAndrei Emeltchenko 2474239d16fSMat Martineau static void __set_retrans_timer(struct l2cap_chan *chan) 2484239d16fSMat Martineau { 2494239d16fSMat Martineau if (!delayed_work_pending(&chan->monitor_timer) && 2504239d16fSMat Martineau chan->retrans_timeout) { 2514239d16fSMat Martineau l2cap_set_timer(chan, &chan->retrans_timer, 2524239d16fSMat Martineau msecs_to_jiffies(chan->retrans_timeout)); 2534239d16fSMat Martineau } 2544239d16fSMat Martineau } 2554239d16fSMat Martineau 2564239d16fSMat Martineau static void __set_monitor_timer(struct l2cap_chan *chan) 2574239d16fSMat Martineau { 2584239d16fSMat Martineau __clear_retrans_timer(chan); 2594239d16fSMat Martineau if (chan->monitor_timeout) { 2604239d16fSMat Martineau l2cap_set_timer(chan, &chan->monitor_timer, 2614239d16fSMat Martineau msecs_to_jiffies(chan->monitor_timeout)); 2624239d16fSMat Martineau } 2634239d16fSMat Martineau } 2644239d16fSMat Martineau 265608bcc6dSMat Martineau static struct sk_buff *l2cap_ertm_seq_in_queue(struct sk_buff_head *head, 266608bcc6dSMat Martineau u16 seq) 267608bcc6dSMat Martineau { 268608bcc6dSMat Martineau struct sk_buff *skb; 269608bcc6dSMat Martineau 270608bcc6dSMat Martineau skb_queue_walk(head, skb) { 271608bcc6dSMat Martineau if (bt_cb(skb)->control.txseq == seq) 272608bcc6dSMat Martineau return skb; 273608bcc6dSMat Martineau } 274608bcc6dSMat Martineau 275608bcc6dSMat Martineau return NULL; 276608bcc6dSMat Martineau } 277608bcc6dSMat Martineau 2783c588192SMat Martineau /* ---- L2CAP sequence number lists ---- */ 2793c588192SMat Martineau 2803c588192SMat Martineau /* For ERTM, ordered lists of sequence numbers must be tracked for 2813c588192SMat Martineau * SREJ requests that are received and for frames that are to be 2823c588192SMat Martineau * retransmitted. These seq_list functions implement a singly-linked 2833c588192SMat Martineau * list in an array, where membership in the list can also be checked 2843c588192SMat Martineau * in constant time. Items can also be added to the tail of the list 2853c588192SMat Martineau * and removed from the head in constant time, without further memory 2863c588192SMat Martineau * allocs or frees. 2873c588192SMat Martineau */ 2883c588192SMat Martineau 2893c588192SMat Martineau static int l2cap_seq_list_init(struct l2cap_seq_list *seq_list, u16 size) 2903c588192SMat Martineau { 2913c588192SMat Martineau size_t alloc_size, i; 2923c588192SMat Martineau 2933c588192SMat Martineau /* Allocated size is a power of 2 to map sequence numbers 2943c588192SMat Martineau * (which may be up to 14 bits) in to a smaller array that is 2953c588192SMat Martineau * sized for the negotiated ERTM transmit windows. 2963c588192SMat Martineau */ 2973c588192SMat Martineau alloc_size = roundup_pow_of_two(size); 2983c588192SMat Martineau 2993c588192SMat Martineau seq_list->list = kmalloc(sizeof(u16) * alloc_size, GFP_KERNEL); 3003c588192SMat Martineau if (!seq_list->list) 3013c588192SMat Martineau return -ENOMEM; 3023c588192SMat Martineau 3033c588192SMat Martineau seq_list->mask = alloc_size - 1; 3043c588192SMat Martineau seq_list->head = L2CAP_SEQ_LIST_CLEAR; 3053c588192SMat Martineau seq_list->tail = L2CAP_SEQ_LIST_CLEAR; 3063c588192SMat Martineau for (i = 0; i < alloc_size; i++) 3073c588192SMat Martineau seq_list->list[i] = L2CAP_SEQ_LIST_CLEAR; 3083c588192SMat Martineau 3093c588192SMat Martineau return 0; 3103c588192SMat Martineau } 3113c588192SMat Martineau 3123c588192SMat Martineau static inline void l2cap_seq_list_free(struct l2cap_seq_list *seq_list) 3133c588192SMat Martineau { 3143c588192SMat Martineau kfree(seq_list->list); 3153c588192SMat Martineau } 3163c588192SMat Martineau 3173c588192SMat Martineau static inline bool l2cap_seq_list_contains(struct l2cap_seq_list *seq_list, 3183c588192SMat Martineau u16 seq) 3193c588192SMat Martineau { 3203c588192SMat Martineau /* Constant-time check for list membership */ 3213c588192SMat Martineau return seq_list->list[seq & seq_list->mask] != L2CAP_SEQ_LIST_CLEAR; 3223c588192SMat Martineau } 3233c588192SMat Martineau 3243c588192SMat Martineau static u16 l2cap_seq_list_remove(struct l2cap_seq_list *seq_list, u16 seq) 3253c588192SMat Martineau { 3263c588192SMat Martineau u16 mask = seq_list->mask; 3273c588192SMat Martineau 3283c588192SMat Martineau if (seq_list->head == L2CAP_SEQ_LIST_CLEAR) { 3293c588192SMat Martineau /* In case someone tries to pop the head of an empty list */ 3303c588192SMat Martineau return L2CAP_SEQ_LIST_CLEAR; 3313c588192SMat Martineau } else if (seq_list->head == seq) { 3323c588192SMat Martineau /* Head can be removed in constant time */ 3333c588192SMat Martineau seq_list->head = seq_list->list[seq & mask]; 3343c588192SMat Martineau seq_list->list[seq & mask] = L2CAP_SEQ_LIST_CLEAR; 3353c588192SMat Martineau 3363c588192SMat Martineau if (seq_list->head == L2CAP_SEQ_LIST_TAIL) { 3373c588192SMat Martineau seq_list->head = L2CAP_SEQ_LIST_CLEAR; 3383c588192SMat Martineau seq_list->tail = L2CAP_SEQ_LIST_CLEAR; 3393c588192SMat Martineau } 3403c588192SMat Martineau } else { 3413c588192SMat Martineau /* Walk the list to find the sequence number */ 3423c588192SMat Martineau u16 prev = seq_list->head; 3433c588192SMat Martineau while (seq_list->list[prev & mask] != seq) { 3443c588192SMat Martineau prev = seq_list->list[prev & mask]; 3453c588192SMat Martineau if (prev == L2CAP_SEQ_LIST_TAIL) 3463c588192SMat Martineau return L2CAP_SEQ_LIST_CLEAR; 3473c588192SMat Martineau } 3483c588192SMat Martineau 3493c588192SMat Martineau /* Unlink the number from the list and clear it */ 3503c588192SMat Martineau seq_list->list[prev & mask] = seq_list->list[seq & mask]; 3513c588192SMat Martineau seq_list->list[seq & mask] = L2CAP_SEQ_LIST_CLEAR; 3523c588192SMat Martineau if (seq_list->tail == seq) 3533c588192SMat Martineau seq_list->tail = prev; 3543c588192SMat Martineau } 3553c588192SMat Martineau return seq; 3563c588192SMat Martineau } 3573c588192SMat Martineau 3583c588192SMat Martineau static inline u16 l2cap_seq_list_pop(struct l2cap_seq_list *seq_list) 3593c588192SMat Martineau { 3603c588192SMat Martineau /* Remove the head in constant time */ 3613c588192SMat Martineau return l2cap_seq_list_remove(seq_list, seq_list->head); 3623c588192SMat Martineau } 3633c588192SMat Martineau 3643c588192SMat Martineau static void l2cap_seq_list_clear(struct l2cap_seq_list *seq_list) 3653c588192SMat Martineau { 3663c588192SMat Martineau u16 i; 367f522ae36SGustavo Padovan 368f522ae36SGustavo Padovan if (seq_list->head == L2CAP_SEQ_LIST_CLEAR) 369f522ae36SGustavo Padovan return; 370f522ae36SGustavo Padovan 3713c588192SMat Martineau for (i = 0; i <= seq_list->mask; i++) 3723c588192SMat Martineau seq_list->list[i] = L2CAP_SEQ_LIST_CLEAR; 3733c588192SMat Martineau 3743c588192SMat Martineau seq_list->head = L2CAP_SEQ_LIST_CLEAR; 3753c588192SMat Martineau seq_list->tail = L2CAP_SEQ_LIST_CLEAR; 3763c588192SMat Martineau } 3773c588192SMat Martineau 3783c588192SMat Martineau static void l2cap_seq_list_append(struct l2cap_seq_list *seq_list, u16 seq) 3793c588192SMat Martineau { 3803c588192SMat Martineau u16 mask = seq_list->mask; 3813c588192SMat Martineau 3823c588192SMat Martineau /* All appends happen in constant time */ 3833c588192SMat Martineau 384f522ae36SGustavo Padovan if (seq_list->list[seq & mask] != L2CAP_SEQ_LIST_CLEAR) 385f522ae36SGustavo Padovan return; 386f522ae36SGustavo Padovan 3873c588192SMat Martineau if (seq_list->tail == L2CAP_SEQ_LIST_CLEAR) 3883c588192SMat Martineau seq_list->head = seq; 3893c588192SMat Martineau else 3903c588192SMat Martineau seq_list->list[seq_list->tail & mask] = seq; 3913c588192SMat Martineau 3923c588192SMat Martineau seq_list->tail = seq; 3933c588192SMat Martineau seq_list->list[seq & mask] = L2CAP_SEQ_LIST_TAIL; 3943c588192SMat Martineau } 3953c588192SMat Martineau 396721c4181SGustavo F. Padovan static void l2cap_chan_timeout(struct work_struct *work) 397ab07801dSGustavo F. Padovan { 398721c4181SGustavo F. Padovan struct l2cap_chan *chan = container_of(work, struct l2cap_chan, 399721c4181SGustavo F. Padovan chan_timer.work); 4003df91ea2SAndrei Emeltchenko struct l2cap_conn *conn = chan->conn; 401ab07801dSGustavo F. Padovan int reason; 402ab07801dSGustavo F. Padovan 403e05dcc32SAndrei Emeltchenko BT_DBG("chan %p state %s", chan, state_to_string(chan->state)); 404ab07801dSGustavo F. Padovan 4053df91ea2SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 4066be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 407ab07801dSGustavo F. Padovan 40889bc500eSGustavo F. Padovan if (chan->state == BT_CONNECTED || chan->state == BT_CONFIG) 409ab07801dSGustavo F. Padovan reason = ECONNREFUSED; 41089bc500eSGustavo F. Padovan else if (chan->state == BT_CONNECT && 411ab07801dSGustavo F. Padovan chan->sec_level != BT_SECURITY_SDP) 412ab07801dSGustavo F. Padovan reason = ECONNREFUSED; 413ab07801dSGustavo F. Padovan else 414ab07801dSGustavo F. Padovan reason = ETIMEDOUT; 415ab07801dSGustavo F. Padovan 4160f852724SGustavo F. Padovan l2cap_chan_close(chan, reason); 417ab07801dSGustavo F. Padovan 4186be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 419ab07801dSGustavo F. Padovan 42080b98027SGustavo Padovan chan->ops->close(chan); 4213df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 4223df91ea2SAndrei Emeltchenko 423371fd835SUlisses Furquim l2cap_chan_put(chan); 424ab07801dSGustavo F. Padovan } 425ab07801dSGustavo F. Padovan 426eef1d9b6SGustavo Padovan struct l2cap_chan *l2cap_chan_create(void) 4270a708f8fSGustavo F. Padovan { 42848454079SGustavo F. Padovan struct l2cap_chan *chan; 4290a708f8fSGustavo F. Padovan 43048454079SGustavo F. Padovan chan = kzalloc(sizeof(*chan), GFP_ATOMIC); 43148454079SGustavo F. Padovan if (!chan) 43248454079SGustavo F. Padovan return NULL; 4330a708f8fSGustavo F. Padovan 434c03b355eSAndrei Emeltchenko mutex_init(&chan->lock); 435c03b355eSAndrei Emeltchenko 436333055f2SGustavo F. Padovan write_lock(&chan_list_lock); 43723691d75SGustavo F. Padovan list_add(&chan->global_l, &chan_list); 438333055f2SGustavo F. Padovan write_unlock(&chan_list_lock); 43923691d75SGustavo F. Padovan 440721c4181SGustavo F. Padovan INIT_DELAYED_WORK(&chan->chan_timer, l2cap_chan_timeout); 441ab07801dSGustavo F. Padovan 44289bc500eSGustavo F. Padovan chan->state = BT_OPEN; 44389bc500eSGustavo F. Padovan 444144ad330SSyam Sidhardhan kref_init(&chan->kref); 44571ba0e56SGustavo F. Padovan 4462827011fSMat Martineau /* This flag is cleared in l2cap_chan_ready() */ 4472827011fSMat Martineau set_bit(CONF_NOT_COMPLETE, &chan->conf_state); 4482827011fSMat Martineau 449eef1d9b6SGustavo Padovan BT_DBG("chan %p", chan); 450abc545b8SSzymon Janc 45148454079SGustavo F. Padovan return chan; 4520a708f8fSGustavo F. Padovan } 4530a708f8fSGustavo F. Padovan 454144ad330SSyam Sidhardhan static void l2cap_chan_destroy(struct kref *kref) 4556ff5abbfSGustavo F. Padovan { 456144ad330SSyam Sidhardhan struct l2cap_chan *chan = container_of(kref, struct l2cap_chan, kref); 457144ad330SSyam Sidhardhan 4584af66c69SJaganath Kanakkassery BT_DBG("chan %p", chan); 4594af66c69SJaganath Kanakkassery 460333055f2SGustavo F. Padovan write_lock(&chan_list_lock); 46123691d75SGustavo F. Padovan list_del(&chan->global_l); 462333055f2SGustavo F. Padovan write_unlock(&chan_list_lock); 46323691d75SGustavo F. Padovan 4644af66c69SJaganath Kanakkassery kfree(chan); 4656ff5abbfSGustavo F. Padovan } 4666ff5abbfSGustavo F. Padovan 46730648372SJaganath Kanakkassery void l2cap_chan_hold(struct l2cap_chan *c) 46830648372SJaganath Kanakkassery { 469144ad330SSyam Sidhardhan BT_DBG("chan %p orig refcnt %d", c, atomic_read(&c->kref.refcount)); 47030648372SJaganath Kanakkassery 471144ad330SSyam Sidhardhan kref_get(&c->kref); 47230648372SJaganath Kanakkassery } 47330648372SJaganath Kanakkassery 47430648372SJaganath Kanakkassery void l2cap_chan_put(struct l2cap_chan *c) 47530648372SJaganath Kanakkassery { 476144ad330SSyam Sidhardhan BT_DBG("chan %p orig refcnt %d", c, atomic_read(&c->kref.refcount)); 47730648372SJaganath Kanakkassery 478144ad330SSyam Sidhardhan kref_put(&c->kref, l2cap_chan_destroy); 47930648372SJaganath Kanakkassery } 48030648372SJaganath Kanakkassery 481bd4b1653SAndrei Emeltchenko void l2cap_chan_set_defaults(struct l2cap_chan *chan) 482bd4b1653SAndrei Emeltchenko { 483bd4b1653SAndrei Emeltchenko chan->fcs = L2CAP_FCS_CRC16; 484bd4b1653SAndrei Emeltchenko chan->max_tx = L2CAP_DEFAULT_MAX_TX; 485bd4b1653SAndrei Emeltchenko chan->tx_win = L2CAP_DEFAULT_TX_WINDOW; 486bd4b1653SAndrei Emeltchenko chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW; 487c20f8e35SMat Martineau chan->ack_win = L2CAP_DEFAULT_TX_WINDOW; 488bd4b1653SAndrei Emeltchenko chan->sec_level = BT_SECURITY_LOW; 489bd4b1653SAndrei Emeltchenko 490bd4b1653SAndrei Emeltchenko set_bit(FLAG_FORCE_ACTIVE, &chan->flags); 491bd4b1653SAndrei Emeltchenko } 492bd4b1653SAndrei Emeltchenko 49393c3e8f5SAndrei Emeltchenko void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan) 4940a708f8fSGustavo F. Padovan { 4950a708f8fSGustavo F. Padovan BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, 496097db76cSAndrei Emeltchenko __le16_to_cpu(chan->psm), chan->dcid); 4970a708f8fSGustavo F. Padovan 4989f5a0d7bSAndrei Emeltchenko conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM; 4990a708f8fSGustavo F. Padovan 5008c1d787bSGustavo F. Padovan chan->conn = conn; 5010a708f8fSGustavo F. Padovan 5025491120eSAndrei Emeltchenko switch (chan->chan_type) { 5035491120eSAndrei Emeltchenko case L2CAP_CHAN_CONN_ORIENTED: 504b62f328bSVille Tervo if (conn->hcon->type == LE_LINK) { 505b62f328bSVille Tervo /* LE connection */ 5066fcb06a2SAndre Guedes chan->omtu = L2CAP_DEFAULT_MTU; 5079f22398cSJohan Hedberg if (chan->dcid == L2CAP_CID_ATT) 508073d1cf3SJohan Hedberg chan->scid = L2CAP_CID_ATT; 5099f22398cSJohan Hedberg else 5109f22398cSJohan Hedberg chan->scid = l2cap_alloc_cid(conn); 511b62f328bSVille Tervo } else { 5120a708f8fSGustavo F. Padovan /* Alloc CID for connection-oriented socket */ 513fe4128e0SGustavo F. Padovan chan->scid = l2cap_alloc_cid(conn); 5140c1bc5c6SGustavo F. Padovan chan->omtu = L2CAP_DEFAULT_MTU; 515b62f328bSVille Tervo } 5165491120eSAndrei Emeltchenko break; 5175491120eSAndrei Emeltchenko 5185491120eSAndrei Emeltchenko case L2CAP_CHAN_CONN_LESS: 5190a708f8fSGustavo F. Padovan /* Connectionless socket */ 520fe4128e0SGustavo F. Padovan chan->scid = L2CAP_CID_CONN_LESS; 521fe4128e0SGustavo F. Padovan chan->dcid = L2CAP_CID_CONN_LESS; 5220c1bc5c6SGustavo F. Padovan chan->omtu = L2CAP_DEFAULT_MTU; 5235491120eSAndrei Emeltchenko break; 5245491120eSAndrei Emeltchenko 525416fa752SAndrei Emeltchenko case L2CAP_CHAN_CONN_FIX_A2MP: 526416fa752SAndrei Emeltchenko chan->scid = L2CAP_CID_A2MP; 527416fa752SAndrei Emeltchenko chan->dcid = L2CAP_CID_A2MP; 528416fa752SAndrei Emeltchenko chan->omtu = L2CAP_A2MP_DEFAULT_MTU; 529416fa752SAndrei Emeltchenko chan->imtu = L2CAP_A2MP_DEFAULT_MTU; 530416fa752SAndrei Emeltchenko break; 531416fa752SAndrei Emeltchenko 5325491120eSAndrei Emeltchenko default: 5330a708f8fSGustavo F. Padovan /* Raw socket can send/recv signalling messages only */ 534fe4128e0SGustavo F. Padovan chan->scid = L2CAP_CID_SIGNALING; 535fe4128e0SGustavo F. Padovan chan->dcid = L2CAP_CID_SIGNALING; 5360c1bc5c6SGustavo F. Padovan chan->omtu = L2CAP_DEFAULT_MTU; 5370a708f8fSGustavo F. Padovan } 5380a708f8fSGustavo F. Padovan 5398f7975b1SAndrei Emeltchenko chan->local_id = L2CAP_BESTEFFORT_ID; 5408f7975b1SAndrei Emeltchenko chan->local_stype = L2CAP_SERV_BESTEFFORT; 5418f7975b1SAndrei Emeltchenko chan->local_msdu = L2CAP_DEFAULT_MAX_SDU_SIZE; 5428f7975b1SAndrei Emeltchenko chan->local_sdu_itime = L2CAP_DEFAULT_SDU_ITIME; 5438f7975b1SAndrei Emeltchenko chan->local_acc_lat = L2CAP_DEFAULT_ACC_LAT; 5448936fa6dSAndrei Emeltchenko chan->local_flush_to = L2CAP_EFS_DEFAULT_FLUSH_TO; 5458f7975b1SAndrei Emeltchenko 546371fd835SUlisses Furquim l2cap_chan_hold(chan); 547baa7e1faSGustavo F. Padovan 5485ee9891dSJohan Hedberg hci_conn_hold(conn->hcon); 5495ee9891dSJohan Hedberg 5503df91ea2SAndrei Emeltchenko list_add(&chan->list, &conn->chan_l); 551643162a8SAndrei Emeltchenko } 552643162a8SAndrei Emeltchenko 553466f8004SAndrei Emeltchenko void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan) 554643162a8SAndrei Emeltchenko { 555643162a8SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 556643162a8SAndrei Emeltchenko __l2cap_chan_add(conn, chan); 5573df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 5580a708f8fSGustavo F. Padovan } 5590a708f8fSGustavo F. Padovan 560466f8004SAndrei Emeltchenko void l2cap_chan_del(struct l2cap_chan *chan, int err) 5610a708f8fSGustavo F. Padovan { 5628c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 5630a708f8fSGustavo F. Padovan 564c9b66675SGustavo F. Padovan __clear_chan_timer(chan); 5650a708f8fSGustavo F. Padovan 56649208c9cSGustavo F. Padovan BT_DBG("chan %p, conn %p, err %d", chan, conn, err); 5670a708f8fSGustavo F. Padovan 5680a708f8fSGustavo F. Padovan if (conn) { 56956f60984SAndrei Emeltchenko struct amp_mgr *mgr = conn->hcon->amp_mgr; 570baa7e1faSGustavo F. Padovan /* Delete from channel list */ 5713df91ea2SAndrei Emeltchenko list_del(&chan->list); 5723d57dc68SGustavo F. Padovan 573371fd835SUlisses Furquim l2cap_chan_put(chan); 574baa7e1faSGustavo F. Padovan 5758c1d787bSGustavo F. Padovan chan->conn = NULL; 5763cabbfdaSAndrei Emeltchenko 5773cabbfdaSAndrei Emeltchenko if (chan->chan_type != L2CAP_CHAN_CONN_FIX_A2MP) 57876a68ba0SDavid Herrmann hci_conn_drop(conn->hcon); 57956f60984SAndrei Emeltchenko 58056f60984SAndrei Emeltchenko if (mgr && mgr->bredr_chan == chan) 58156f60984SAndrei Emeltchenko mgr->bredr_chan = NULL; 5820a708f8fSGustavo F. Padovan } 5830a708f8fSGustavo F. Padovan 584419e08c1SAndrei Emeltchenko if (chan->hs_hchan) { 585419e08c1SAndrei Emeltchenko struct hci_chan *hs_hchan = chan->hs_hchan; 586419e08c1SAndrei Emeltchenko 587419e08c1SAndrei Emeltchenko BT_DBG("chan %p disconnect hs_hchan %p", chan, hs_hchan); 588419e08c1SAndrei Emeltchenko amp_disconnect_logical_link(hs_hchan); 589419e08c1SAndrei Emeltchenko } 590419e08c1SAndrei Emeltchenko 591c0df7f6eSAndrei Emeltchenko chan->ops->teardown(chan, err); 5926be36555SAndrei Emeltchenko 5932827011fSMat Martineau if (test_bit(CONF_NOT_COMPLETE, &chan->conf_state)) 5946ff5abbfSGustavo F. Padovan return; 5952ead70b8SGustavo F. Padovan 596ee556f66SGustavo Padovan switch(chan->mode) { 597ee556f66SGustavo Padovan case L2CAP_MODE_BASIC: 598ee556f66SGustavo Padovan break; 5990a708f8fSGustavo F. Padovan 600ee556f66SGustavo Padovan case L2CAP_MODE_ERTM: 6011a09bcb9SGustavo F. Padovan __clear_retrans_timer(chan); 6021a09bcb9SGustavo F. Padovan __clear_monitor_timer(chan); 6031a09bcb9SGustavo F. Padovan __clear_ack_timer(chan); 6040a708f8fSGustavo F. Padovan 605f1c6775bSGustavo F. Padovan skb_queue_purge(&chan->srej_q); 6060a708f8fSGustavo F. Padovan 6073c588192SMat Martineau l2cap_seq_list_free(&chan->srej_list); 6083c588192SMat Martineau l2cap_seq_list_free(&chan->retrans_list); 609ee556f66SGustavo Padovan 610ee556f66SGustavo Padovan /* fall through */ 611ee556f66SGustavo Padovan 612ee556f66SGustavo Padovan case L2CAP_MODE_STREAMING: 613ee556f66SGustavo Padovan skb_queue_purge(&chan->tx_q); 614ee556f66SGustavo Padovan break; 6150a708f8fSGustavo F. Padovan } 616ee556f66SGustavo Padovan 617ee556f66SGustavo Padovan return; 6180a708f8fSGustavo F. Padovan } 6190a708f8fSGustavo F. Padovan 6200f852724SGustavo F. Padovan void l2cap_chan_close(struct l2cap_chan *chan, int reason) 6214519de9aSGustavo F. Padovan { 6224519de9aSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 6234519de9aSGustavo F. Padovan struct sock *sk = chan->sk; 6244519de9aSGustavo F. Padovan 6252d792818SGustavo Padovan BT_DBG("chan %p state %s sk %p", chan, state_to_string(chan->state), 6262d792818SGustavo Padovan sk); 6274519de9aSGustavo F. Padovan 62889bc500eSGustavo F. Padovan switch (chan->state) { 6294519de9aSGustavo F. Padovan case BT_LISTEN: 630c0df7f6eSAndrei Emeltchenko chan->ops->teardown(chan, 0); 6314519de9aSGustavo F. Padovan break; 6324519de9aSGustavo F. Padovan 6334519de9aSGustavo F. Padovan case BT_CONNECTED: 6344519de9aSGustavo F. Padovan case BT_CONFIG: 635715ec005SGustavo F. Padovan if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && 6364519de9aSGustavo F. Padovan conn->hcon->type == ACL_LINK) { 637c9b66675SGustavo F. Padovan __set_chan_timer(chan, sk->sk_sndtimeo); 6385e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, reason); 6394519de9aSGustavo F. Padovan } else 6404519de9aSGustavo F. Padovan l2cap_chan_del(chan, reason); 6414519de9aSGustavo F. Padovan break; 6424519de9aSGustavo F. Padovan 6434519de9aSGustavo F. Padovan case BT_CONNECT2: 644715ec005SGustavo F. Padovan if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && 6454519de9aSGustavo F. Padovan conn->hcon->type == ACL_LINK) { 6464519de9aSGustavo F. Padovan struct l2cap_conn_rsp rsp; 6474519de9aSGustavo F. Padovan __u16 result; 6484519de9aSGustavo F. Padovan 649c5daa683SGustavo Padovan if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) 6504519de9aSGustavo F. Padovan result = L2CAP_CR_SEC_BLOCK; 6514519de9aSGustavo F. Padovan else 6524519de9aSGustavo F. Padovan result = L2CAP_CR_BAD_PSM; 65389bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_DISCONN); 6544519de9aSGustavo F. Padovan 6554519de9aSGustavo F. Padovan rsp.scid = cpu_to_le16(chan->dcid); 6564519de9aSGustavo F. Padovan rsp.dcid = cpu_to_le16(chan->scid); 6574519de9aSGustavo F. Padovan rsp.result = cpu_to_le16(result); 658ac73498cSAndrei Emeltchenko rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO); 6594519de9aSGustavo F. Padovan l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, 6604519de9aSGustavo F. Padovan sizeof(rsp), &rsp); 6614519de9aSGustavo F. Padovan } 6624519de9aSGustavo F. Padovan 6634519de9aSGustavo F. Padovan l2cap_chan_del(chan, reason); 6644519de9aSGustavo F. Padovan break; 6654519de9aSGustavo F. Padovan 6664519de9aSGustavo F. Padovan case BT_CONNECT: 6674519de9aSGustavo F. Padovan case BT_DISCONN: 6684519de9aSGustavo F. Padovan l2cap_chan_del(chan, reason); 6694519de9aSGustavo F. Padovan break; 6704519de9aSGustavo F. Padovan 6714519de9aSGustavo F. Padovan default: 672c0df7f6eSAndrei Emeltchenko chan->ops->teardown(chan, 0); 6734519de9aSGustavo F. Padovan break; 6744519de9aSGustavo F. Padovan } 6754519de9aSGustavo F. Padovan } 6764519de9aSGustavo F. Padovan 6774343478fSGustavo F. Padovan static inline u8 l2cap_get_auth_type(struct l2cap_chan *chan) 6780a708f8fSGustavo F. Padovan { 679715ec005SGustavo F. Padovan if (chan->chan_type == L2CAP_CHAN_RAW) { 6804343478fSGustavo F. Padovan switch (chan->sec_level) { 6810a708f8fSGustavo F. Padovan case BT_SECURITY_HIGH: 6820a708f8fSGustavo F. Padovan return HCI_AT_DEDICATED_BONDING_MITM; 6830a708f8fSGustavo F. Padovan case BT_SECURITY_MEDIUM: 6840a708f8fSGustavo F. Padovan return HCI_AT_DEDICATED_BONDING; 6850a708f8fSGustavo F. Padovan default: 6860a708f8fSGustavo F. Padovan return HCI_AT_NO_BONDING; 6870a708f8fSGustavo F. Padovan } 6882983fd68SAndrei Emeltchenko } else if (chan->psm == __constant_cpu_to_le16(L2CAP_PSM_SDP)) { 6894343478fSGustavo F. Padovan if (chan->sec_level == BT_SECURITY_LOW) 6904343478fSGustavo F. Padovan chan->sec_level = BT_SECURITY_SDP; 6910a708f8fSGustavo F. Padovan 6924343478fSGustavo F. Padovan if (chan->sec_level == BT_SECURITY_HIGH) 6930a708f8fSGustavo F. Padovan return HCI_AT_NO_BONDING_MITM; 6940a708f8fSGustavo F. Padovan else 6950a708f8fSGustavo F. Padovan return HCI_AT_NO_BONDING; 6960a708f8fSGustavo F. Padovan } else { 6974343478fSGustavo F. Padovan switch (chan->sec_level) { 6980a708f8fSGustavo F. Padovan case BT_SECURITY_HIGH: 6990a708f8fSGustavo F. Padovan return HCI_AT_GENERAL_BONDING_MITM; 7000a708f8fSGustavo F. Padovan case BT_SECURITY_MEDIUM: 7010a708f8fSGustavo F. Padovan return HCI_AT_GENERAL_BONDING; 7020a708f8fSGustavo F. Padovan default: 7030a708f8fSGustavo F. Padovan return HCI_AT_NO_BONDING; 7040a708f8fSGustavo F. Padovan } 7050a708f8fSGustavo F. Padovan } 7060a708f8fSGustavo F. Padovan } 7070a708f8fSGustavo F. Padovan 7080a708f8fSGustavo F. Padovan /* Service level security */ 709d45fc423SGustavo F. Padovan int l2cap_chan_check_security(struct l2cap_chan *chan) 7100a708f8fSGustavo F. Padovan { 7118c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 7120a708f8fSGustavo F. Padovan __u8 auth_type; 7130a708f8fSGustavo F. Padovan 7144343478fSGustavo F. Padovan auth_type = l2cap_get_auth_type(chan); 7150a708f8fSGustavo F. Padovan 7164343478fSGustavo F. Padovan return hci_conn_security(conn->hcon, chan->sec_level, auth_type); 7170a708f8fSGustavo F. Padovan } 7180a708f8fSGustavo F. Padovan 719b5ad8b7fSJohannes Berg static u8 l2cap_get_ident(struct l2cap_conn *conn) 7200a708f8fSGustavo F. Padovan { 7210a708f8fSGustavo F. Padovan u8 id; 7220a708f8fSGustavo F. Padovan 7230a708f8fSGustavo F. Padovan /* Get next available identificator. 7240a708f8fSGustavo F. Padovan * 1 - 128 are used by kernel. 7250a708f8fSGustavo F. Padovan * 129 - 199 are reserved. 7260a708f8fSGustavo F. Padovan * 200 - 254 are used by utilities like l2ping, etc. 7270a708f8fSGustavo F. Padovan */ 7280a708f8fSGustavo F. Padovan 729333055f2SGustavo F. Padovan spin_lock(&conn->lock); 7300a708f8fSGustavo F. Padovan 7310a708f8fSGustavo F. Padovan if (++conn->tx_ident > 128) 7320a708f8fSGustavo F. Padovan conn->tx_ident = 1; 7330a708f8fSGustavo F. Padovan 7340a708f8fSGustavo F. Padovan id = conn->tx_ident; 7350a708f8fSGustavo F. Padovan 736333055f2SGustavo F. Padovan spin_unlock(&conn->lock); 7370a708f8fSGustavo F. Padovan 7380a708f8fSGustavo F. Padovan return id; 7390a708f8fSGustavo F. Padovan } 7400a708f8fSGustavo F. Padovan 7412d792818SGustavo Padovan static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, 7422d792818SGustavo Padovan void *data) 7430a708f8fSGustavo F. Padovan { 7440a708f8fSGustavo F. Padovan struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); 7450a708f8fSGustavo F. Padovan u8 flags; 7460a708f8fSGustavo F. Padovan 7470a708f8fSGustavo F. Padovan BT_DBG("code 0x%2.2x", code); 7480a708f8fSGustavo F. Padovan 7490a708f8fSGustavo F. Padovan if (!skb) 7500a708f8fSGustavo F. Padovan return; 7510a708f8fSGustavo F. Padovan 7520a708f8fSGustavo F. Padovan if (lmp_no_flush_capable(conn->hcon->hdev)) 7530a708f8fSGustavo F. Padovan flags = ACL_START_NO_FLUSH; 7540a708f8fSGustavo F. Padovan else 7550a708f8fSGustavo F. Padovan flags = ACL_START; 7560a708f8fSGustavo F. Padovan 75714b12d0bSJaikumar Ganesh bt_cb(skb)->force_active = BT_POWER_FORCE_ACTIVE_ON; 7585e59b791SLuiz Augusto von Dentz skb->priority = HCI_PRIO_MAX; 75914b12d0bSJaikumar Ganesh 76073d80debSLuiz Augusto von Dentz hci_send_acl(conn->hchan, skb, flags); 7610a708f8fSGustavo F. Padovan } 7620a708f8fSGustavo F. Padovan 76302b0fbb9SMat Martineau static bool __chan_is_moving(struct l2cap_chan *chan) 76402b0fbb9SMat Martineau { 76502b0fbb9SMat Martineau return chan->move_state != L2CAP_MOVE_STABLE && 76602b0fbb9SMat Martineau chan->move_state != L2CAP_MOVE_WAIT_PREPARE; 76702b0fbb9SMat Martineau } 76802b0fbb9SMat Martineau 76973d80debSLuiz Augusto von Dentz static void l2cap_do_send(struct l2cap_chan *chan, struct sk_buff *skb) 77073d80debSLuiz Augusto von Dentz { 77173d80debSLuiz Augusto von Dentz struct hci_conn *hcon = chan->conn->hcon; 77273d80debSLuiz Augusto von Dentz u16 flags; 77373d80debSLuiz Augusto von Dentz 77473d80debSLuiz Augusto von Dentz BT_DBG("chan %p, skb %p len %d priority %u", chan, skb, skb->len, 77573d80debSLuiz Augusto von Dentz skb->priority); 77673d80debSLuiz Augusto von Dentz 777d5f8a75dSMat Martineau if (chan->hs_hcon && !__chan_is_moving(chan)) { 778d5f8a75dSMat Martineau if (chan->hs_hchan) 779d5f8a75dSMat Martineau hci_send_acl(chan->hs_hchan, skb, ACL_COMPLETE); 780d5f8a75dSMat Martineau else 781d5f8a75dSMat Martineau kfree_skb(skb); 782d5f8a75dSMat Martineau 783d5f8a75dSMat Martineau return; 784d5f8a75dSMat Martineau } 785d5f8a75dSMat Martineau 78673d80debSLuiz Augusto von Dentz if (!test_bit(FLAG_FLUSHABLE, &chan->flags) && 78773d80debSLuiz Augusto von Dentz lmp_no_flush_capable(hcon->hdev)) 78873d80debSLuiz Augusto von Dentz flags = ACL_START_NO_FLUSH; 78973d80debSLuiz Augusto von Dentz else 79073d80debSLuiz Augusto von Dentz flags = ACL_START; 79173d80debSLuiz Augusto von Dentz 79273d80debSLuiz Augusto von Dentz bt_cb(skb)->force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); 79373d80debSLuiz Augusto von Dentz hci_send_acl(chan->conn->hchan, skb, flags); 7940a708f8fSGustavo F. Padovan } 7950a708f8fSGustavo F. Padovan 796b5c6aaedSMat Martineau static void __unpack_enhanced_control(u16 enh, struct l2cap_ctrl *control) 797b5c6aaedSMat Martineau { 798b5c6aaedSMat Martineau control->reqseq = (enh & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT; 799b5c6aaedSMat Martineau control->final = (enh & L2CAP_CTRL_FINAL) >> L2CAP_CTRL_FINAL_SHIFT; 800b5c6aaedSMat Martineau 801b5c6aaedSMat Martineau if (enh & L2CAP_CTRL_FRAME_TYPE) { 802b5c6aaedSMat Martineau /* S-Frame */ 803b5c6aaedSMat Martineau control->sframe = 1; 804b5c6aaedSMat Martineau control->poll = (enh & L2CAP_CTRL_POLL) >> L2CAP_CTRL_POLL_SHIFT; 805b5c6aaedSMat Martineau control->super = (enh & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT; 806b5c6aaedSMat Martineau 807b5c6aaedSMat Martineau control->sar = 0; 808b5c6aaedSMat Martineau control->txseq = 0; 809b5c6aaedSMat Martineau } else { 810b5c6aaedSMat Martineau /* I-Frame */ 811b5c6aaedSMat Martineau control->sframe = 0; 812b5c6aaedSMat Martineau control->sar = (enh & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT; 813b5c6aaedSMat Martineau control->txseq = (enh & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT; 814b5c6aaedSMat Martineau 815b5c6aaedSMat Martineau control->poll = 0; 816b5c6aaedSMat Martineau control->super = 0; 817b5c6aaedSMat Martineau } 818b5c6aaedSMat Martineau } 819b5c6aaedSMat Martineau 820b5c6aaedSMat Martineau static void __unpack_extended_control(u32 ext, struct l2cap_ctrl *control) 821b5c6aaedSMat Martineau { 822b5c6aaedSMat Martineau control->reqseq = (ext & L2CAP_EXT_CTRL_REQSEQ) >> L2CAP_EXT_CTRL_REQSEQ_SHIFT; 823b5c6aaedSMat Martineau control->final = (ext & L2CAP_EXT_CTRL_FINAL) >> L2CAP_EXT_CTRL_FINAL_SHIFT; 824b5c6aaedSMat Martineau 825b5c6aaedSMat Martineau if (ext & L2CAP_EXT_CTRL_FRAME_TYPE) { 826b5c6aaedSMat Martineau /* S-Frame */ 827b5c6aaedSMat Martineau control->sframe = 1; 828b5c6aaedSMat Martineau control->poll = (ext & L2CAP_EXT_CTRL_POLL) >> L2CAP_EXT_CTRL_POLL_SHIFT; 829b5c6aaedSMat Martineau control->super = (ext & L2CAP_EXT_CTRL_SUPERVISE) >> L2CAP_EXT_CTRL_SUPER_SHIFT; 830b5c6aaedSMat Martineau 831b5c6aaedSMat Martineau control->sar = 0; 832b5c6aaedSMat Martineau control->txseq = 0; 833b5c6aaedSMat Martineau } else { 834b5c6aaedSMat Martineau /* I-Frame */ 835b5c6aaedSMat Martineau control->sframe = 0; 836b5c6aaedSMat Martineau control->sar = (ext & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT; 837b5c6aaedSMat Martineau control->txseq = (ext & L2CAP_EXT_CTRL_TXSEQ) >> L2CAP_EXT_CTRL_TXSEQ_SHIFT; 838b5c6aaedSMat Martineau 839b5c6aaedSMat Martineau control->poll = 0; 840b5c6aaedSMat Martineau control->super = 0; 841b5c6aaedSMat Martineau } 842b5c6aaedSMat Martineau } 843b5c6aaedSMat Martineau 844b5c6aaedSMat Martineau static inline void __unpack_control(struct l2cap_chan *chan, 845b5c6aaedSMat Martineau struct sk_buff *skb) 846b5c6aaedSMat Martineau { 847b5c6aaedSMat Martineau if (test_bit(FLAG_EXT_CTRL, &chan->flags)) { 848b5c6aaedSMat Martineau __unpack_extended_control(get_unaligned_le32(skb->data), 849b5c6aaedSMat Martineau &bt_cb(skb)->control); 850cec8ab6eSMat Martineau skb_pull(skb, L2CAP_EXT_CTRL_SIZE); 851b5c6aaedSMat Martineau } else { 852b5c6aaedSMat Martineau __unpack_enhanced_control(get_unaligned_le16(skb->data), 853b5c6aaedSMat Martineau &bt_cb(skb)->control); 854cec8ab6eSMat Martineau skb_pull(skb, L2CAP_ENH_CTRL_SIZE); 855b5c6aaedSMat Martineau } 856b5c6aaedSMat Martineau } 857b5c6aaedSMat Martineau 858b5c6aaedSMat Martineau static u32 __pack_extended_control(struct l2cap_ctrl *control) 859b5c6aaedSMat Martineau { 860b5c6aaedSMat Martineau u32 packed; 861b5c6aaedSMat Martineau 862b5c6aaedSMat Martineau packed = control->reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT; 863b5c6aaedSMat Martineau packed |= control->final << L2CAP_EXT_CTRL_FINAL_SHIFT; 864b5c6aaedSMat Martineau 865b5c6aaedSMat Martineau if (control->sframe) { 866b5c6aaedSMat Martineau packed |= control->poll << L2CAP_EXT_CTRL_POLL_SHIFT; 867b5c6aaedSMat Martineau packed |= control->super << L2CAP_EXT_CTRL_SUPER_SHIFT; 868b5c6aaedSMat Martineau packed |= L2CAP_EXT_CTRL_FRAME_TYPE; 869b5c6aaedSMat Martineau } else { 870b5c6aaedSMat Martineau packed |= control->sar << L2CAP_EXT_CTRL_SAR_SHIFT; 871b5c6aaedSMat Martineau packed |= control->txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT; 872b5c6aaedSMat Martineau } 873b5c6aaedSMat Martineau 874b5c6aaedSMat Martineau return packed; 875b5c6aaedSMat Martineau } 876b5c6aaedSMat Martineau 877b5c6aaedSMat Martineau static u16 __pack_enhanced_control(struct l2cap_ctrl *control) 878b5c6aaedSMat Martineau { 879b5c6aaedSMat Martineau u16 packed; 880b5c6aaedSMat Martineau 881b5c6aaedSMat Martineau packed = control->reqseq << L2CAP_CTRL_REQSEQ_SHIFT; 882b5c6aaedSMat Martineau packed |= control->final << L2CAP_CTRL_FINAL_SHIFT; 883b5c6aaedSMat Martineau 884b5c6aaedSMat Martineau if (control->sframe) { 885b5c6aaedSMat Martineau packed |= control->poll << L2CAP_CTRL_POLL_SHIFT; 886b5c6aaedSMat Martineau packed |= control->super << L2CAP_CTRL_SUPER_SHIFT; 887b5c6aaedSMat Martineau packed |= L2CAP_CTRL_FRAME_TYPE; 888b5c6aaedSMat Martineau } else { 889b5c6aaedSMat Martineau packed |= control->sar << L2CAP_CTRL_SAR_SHIFT; 890b5c6aaedSMat Martineau packed |= control->txseq << L2CAP_CTRL_TXSEQ_SHIFT; 891b5c6aaedSMat Martineau } 892b5c6aaedSMat Martineau 893b5c6aaedSMat Martineau return packed; 894b5c6aaedSMat Martineau } 895b5c6aaedSMat Martineau 896b5c6aaedSMat Martineau static inline void __pack_control(struct l2cap_chan *chan, 897b5c6aaedSMat Martineau struct l2cap_ctrl *control, 898b5c6aaedSMat Martineau struct sk_buff *skb) 899b5c6aaedSMat Martineau { 900b5c6aaedSMat Martineau if (test_bit(FLAG_EXT_CTRL, &chan->flags)) { 901b5c6aaedSMat Martineau put_unaligned_le32(__pack_extended_control(control), 902b5c6aaedSMat Martineau skb->data + L2CAP_HDR_SIZE); 903b5c6aaedSMat Martineau } else { 904b5c6aaedSMat Martineau put_unaligned_le16(__pack_enhanced_control(control), 905b5c6aaedSMat Martineau skb->data + L2CAP_HDR_SIZE); 906b5c6aaedSMat Martineau } 907b5c6aaedSMat Martineau } 908b5c6aaedSMat Martineau 909ba7aa64fSGustavo Padovan static inline unsigned int __ertm_hdr_size(struct l2cap_chan *chan) 910ba7aa64fSGustavo Padovan { 911ba7aa64fSGustavo Padovan if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 912ba7aa64fSGustavo Padovan return L2CAP_EXT_HDR_SIZE; 913ba7aa64fSGustavo Padovan else 914ba7aa64fSGustavo Padovan return L2CAP_ENH_HDR_SIZE; 915ba7aa64fSGustavo Padovan } 916ba7aa64fSGustavo Padovan 917a67d7f6fSMat Martineau static struct sk_buff *l2cap_create_sframe_pdu(struct l2cap_chan *chan, 918a67d7f6fSMat Martineau u32 control) 9190a708f8fSGustavo F. Padovan { 9200a708f8fSGustavo F. Padovan struct sk_buff *skb; 9210a708f8fSGustavo F. Padovan struct l2cap_hdr *lh; 922ba7aa64fSGustavo Padovan int hlen = __ertm_hdr_size(chan); 9230a708f8fSGustavo F. Padovan 9240a708f8fSGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) 92503a51213SAndrei Emeltchenko hlen += L2CAP_FCS_SIZE; 9260a708f8fSGustavo F. Padovan 927a67d7f6fSMat Martineau skb = bt_skb_alloc(hlen, GFP_KERNEL); 9280a708f8fSGustavo F. Padovan 9290a708f8fSGustavo F. Padovan if (!skb) 930a67d7f6fSMat Martineau return ERR_PTR(-ENOMEM); 9310a708f8fSGustavo F. Padovan 9320a708f8fSGustavo F. Padovan lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); 9330a708f8fSGustavo F. Padovan lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); 934fe4128e0SGustavo F. Padovan lh->cid = cpu_to_le16(chan->dcid); 93588843ab0SAndrei Emeltchenko 936a67d7f6fSMat Martineau if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 937a67d7f6fSMat Martineau put_unaligned_le32(control, skb_put(skb, L2CAP_EXT_CTRL_SIZE)); 938a67d7f6fSMat Martineau else 939a67d7f6fSMat Martineau put_unaligned_le16(control, skb_put(skb, L2CAP_ENH_CTRL_SIZE)); 9400a708f8fSGustavo F. Padovan 94147d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) { 942a67d7f6fSMat Martineau u16 fcs = crc16(0, (u8 *)skb->data, skb->len); 94303a51213SAndrei Emeltchenko put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE)); 9440a708f8fSGustavo F. Padovan } 9450a708f8fSGustavo F. Padovan 94673d80debSLuiz Augusto von Dentz skb->priority = HCI_PRIO_MAX; 947a67d7f6fSMat Martineau return skb; 948a67d7f6fSMat Martineau } 949a67d7f6fSMat Martineau 950a67d7f6fSMat Martineau static void l2cap_send_sframe(struct l2cap_chan *chan, 951a67d7f6fSMat Martineau struct l2cap_ctrl *control) 952a67d7f6fSMat Martineau { 953a67d7f6fSMat Martineau struct sk_buff *skb; 954a67d7f6fSMat Martineau u32 control_field; 955a67d7f6fSMat Martineau 956a67d7f6fSMat Martineau BT_DBG("chan %p, control %p", chan, control); 957a67d7f6fSMat Martineau 958a67d7f6fSMat Martineau if (!control->sframe) 959a67d7f6fSMat Martineau return; 960a67d7f6fSMat Martineau 961b99e13adSMat Martineau if (__chan_is_moving(chan)) 962b99e13adSMat Martineau return; 963b99e13adSMat Martineau 964a67d7f6fSMat Martineau if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state) && 965a67d7f6fSMat Martineau !control->poll) 966a67d7f6fSMat Martineau control->final = 1; 967a67d7f6fSMat Martineau 968a67d7f6fSMat Martineau if (control->super == L2CAP_SUPER_RR) 969a67d7f6fSMat Martineau clear_bit(CONN_RNR_SENT, &chan->conn_state); 970a67d7f6fSMat Martineau else if (control->super == L2CAP_SUPER_RNR) 971a67d7f6fSMat Martineau set_bit(CONN_RNR_SENT, &chan->conn_state); 972a67d7f6fSMat Martineau 973a67d7f6fSMat Martineau if (control->super != L2CAP_SUPER_SREJ) { 974a67d7f6fSMat Martineau chan->last_acked_seq = control->reqseq; 975a67d7f6fSMat Martineau __clear_ack_timer(chan); 976a67d7f6fSMat Martineau } 977a67d7f6fSMat Martineau 978a67d7f6fSMat Martineau BT_DBG("reqseq %d, final %d, poll %d, super %d", control->reqseq, 979a67d7f6fSMat Martineau control->final, control->poll, control->super); 980a67d7f6fSMat Martineau 981a67d7f6fSMat Martineau if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 982a67d7f6fSMat Martineau control_field = __pack_extended_control(control); 983a67d7f6fSMat Martineau else 984a67d7f6fSMat Martineau control_field = __pack_enhanced_control(control); 985a67d7f6fSMat Martineau 986a67d7f6fSMat Martineau skb = l2cap_create_sframe_pdu(chan, control_field); 987a67d7f6fSMat Martineau if (!IS_ERR(skb)) 98873d80debSLuiz Augusto von Dentz l2cap_do_send(chan, skb); 9890a708f8fSGustavo F. Padovan } 9900a708f8fSGustavo F. Padovan 991c9e3d5e0SMat Martineau static void l2cap_send_rr_or_rnr(struct l2cap_chan *chan, bool poll) 9920a708f8fSGustavo F. Padovan { 993c9e3d5e0SMat Martineau struct l2cap_ctrl control; 9940a708f8fSGustavo F. Padovan 995c9e3d5e0SMat Martineau BT_DBG("chan %p, poll %d", chan, poll); 996c9e3d5e0SMat Martineau 997c9e3d5e0SMat Martineau memset(&control, 0, sizeof(control)); 998c9e3d5e0SMat Martineau control.sframe = 1; 999c9e3d5e0SMat Martineau control.poll = poll; 1000c9e3d5e0SMat Martineau 1001c9e3d5e0SMat Martineau if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) 1002c9e3d5e0SMat Martineau control.super = L2CAP_SUPER_RNR; 1003c9e3d5e0SMat Martineau else 1004c9e3d5e0SMat Martineau control.super = L2CAP_SUPER_RR; 1005c9e3d5e0SMat Martineau 1006c9e3d5e0SMat Martineau control.reqseq = chan->buffer_seq; 1007c9e3d5e0SMat Martineau l2cap_send_sframe(chan, &control); 10080a708f8fSGustavo F. Padovan } 10090a708f8fSGustavo F. Padovan 1010b4450035SGustavo F. Padovan static inline int __l2cap_no_conn_pending(struct l2cap_chan *chan) 10110a708f8fSGustavo F. Padovan { 1012c1360a1cSGustavo F. Padovan return !test_bit(CONF_CONNECT_PEND, &chan->conf_state); 10130a708f8fSGustavo F. Padovan } 10140a708f8fSGustavo F. Padovan 101593c3e8f5SAndrei Emeltchenko static bool __amp_capable(struct l2cap_chan *chan) 101693c3e8f5SAndrei Emeltchenko { 101793c3e8f5SAndrei Emeltchenko struct l2cap_conn *conn = chan->conn; 101893c3e8f5SAndrei Emeltchenko 101993c3e8f5SAndrei Emeltchenko if (enable_hs && 10205d05416eSAndrei Emeltchenko hci_amp_capable() && 102193c3e8f5SAndrei Emeltchenko chan->chan_policy == BT_CHANNEL_POLICY_AMP_PREFERRED && 102293c3e8f5SAndrei Emeltchenko conn->fixed_chan_mask & L2CAP_FC_A2MP) 102393c3e8f5SAndrei Emeltchenko return true; 102493c3e8f5SAndrei Emeltchenko else 102593c3e8f5SAndrei Emeltchenko return false; 102693c3e8f5SAndrei Emeltchenko } 102793c3e8f5SAndrei Emeltchenko 10285ce66b59SAndrei Emeltchenko static bool l2cap_check_efs(struct l2cap_chan *chan) 10295ce66b59SAndrei Emeltchenko { 10305ce66b59SAndrei Emeltchenko /* Check EFS parameters */ 10315ce66b59SAndrei Emeltchenko return true; 10325ce66b59SAndrei Emeltchenko } 10335ce66b59SAndrei Emeltchenko 10342766be48SAndrei Emeltchenko void l2cap_send_conn_req(struct l2cap_chan *chan) 10359b27f350SAndrei Emeltchenko { 10369b27f350SAndrei Emeltchenko struct l2cap_conn *conn = chan->conn; 10379b27f350SAndrei Emeltchenko struct l2cap_conn_req req; 10389b27f350SAndrei Emeltchenko 10399b27f350SAndrei Emeltchenko req.scid = cpu_to_le16(chan->scid); 10409b27f350SAndrei Emeltchenko req.psm = chan->psm; 10419b27f350SAndrei Emeltchenko 10429b27f350SAndrei Emeltchenko chan->ident = l2cap_get_ident(conn); 10439b27f350SAndrei Emeltchenko 10449b27f350SAndrei Emeltchenko set_bit(CONF_CONNECT_PEND, &chan->conf_state); 10459b27f350SAndrei Emeltchenko 10469b27f350SAndrei Emeltchenko l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, sizeof(req), &req); 10479b27f350SAndrei Emeltchenko } 10489b27f350SAndrei Emeltchenko 10498eb200bdSMat Martineau static void l2cap_send_create_chan_req(struct l2cap_chan *chan, u8 amp_id) 10508eb200bdSMat Martineau { 10518eb200bdSMat Martineau struct l2cap_create_chan_req req; 10528eb200bdSMat Martineau req.scid = cpu_to_le16(chan->scid); 10538eb200bdSMat Martineau req.psm = chan->psm; 10548eb200bdSMat Martineau req.amp_id = amp_id; 10558eb200bdSMat Martineau 10568eb200bdSMat Martineau chan->ident = l2cap_get_ident(chan->conn); 10578eb200bdSMat Martineau 10588eb200bdSMat Martineau l2cap_send_cmd(chan->conn, chan->ident, L2CAP_CREATE_CHAN_REQ, 10598eb200bdSMat Martineau sizeof(req), &req); 10608eb200bdSMat Martineau } 10618eb200bdSMat Martineau 106202b0fbb9SMat Martineau static void l2cap_move_setup(struct l2cap_chan *chan) 106302b0fbb9SMat Martineau { 106402b0fbb9SMat Martineau struct sk_buff *skb; 106502b0fbb9SMat Martineau 106602b0fbb9SMat Martineau BT_DBG("chan %p", chan); 106702b0fbb9SMat Martineau 106802b0fbb9SMat Martineau if (chan->mode != L2CAP_MODE_ERTM) 106902b0fbb9SMat Martineau return; 107002b0fbb9SMat Martineau 107102b0fbb9SMat Martineau __clear_retrans_timer(chan); 107202b0fbb9SMat Martineau __clear_monitor_timer(chan); 107302b0fbb9SMat Martineau __clear_ack_timer(chan); 107402b0fbb9SMat Martineau 107502b0fbb9SMat Martineau chan->retry_count = 0; 107602b0fbb9SMat Martineau skb_queue_walk(&chan->tx_q, skb) { 107702b0fbb9SMat Martineau if (bt_cb(skb)->control.retries) 107802b0fbb9SMat Martineau bt_cb(skb)->control.retries = 1; 107902b0fbb9SMat Martineau else 108002b0fbb9SMat Martineau break; 108102b0fbb9SMat Martineau } 108202b0fbb9SMat Martineau 108302b0fbb9SMat Martineau chan->expected_tx_seq = chan->buffer_seq; 108402b0fbb9SMat Martineau 108502b0fbb9SMat Martineau clear_bit(CONN_REJ_ACT, &chan->conn_state); 108602b0fbb9SMat Martineau clear_bit(CONN_SREJ_ACT, &chan->conn_state); 108702b0fbb9SMat Martineau l2cap_seq_list_clear(&chan->retrans_list); 108802b0fbb9SMat Martineau l2cap_seq_list_clear(&chan->srej_list); 108902b0fbb9SMat Martineau skb_queue_purge(&chan->srej_q); 109002b0fbb9SMat Martineau 109102b0fbb9SMat Martineau chan->tx_state = L2CAP_TX_STATE_XMIT; 109202b0fbb9SMat Martineau chan->rx_state = L2CAP_RX_STATE_MOVE; 109302b0fbb9SMat Martineau 109402b0fbb9SMat Martineau set_bit(CONN_REMOTE_BUSY, &chan->conn_state); 109502b0fbb9SMat Martineau } 109602b0fbb9SMat Martineau 10975f3847a4SMat Martineau static void l2cap_move_done(struct l2cap_chan *chan) 10985f3847a4SMat Martineau { 10995f3847a4SMat Martineau u8 move_role = chan->move_role; 11005f3847a4SMat Martineau BT_DBG("chan %p", chan); 11015f3847a4SMat Martineau 11025f3847a4SMat Martineau chan->move_state = L2CAP_MOVE_STABLE; 11035f3847a4SMat Martineau chan->move_role = L2CAP_MOVE_ROLE_NONE; 11045f3847a4SMat Martineau 11055f3847a4SMat Martineau if (chan->mode != L2CAP_MODE_ERTM) 11065f3847a4SMat Martineau return; 11075f3847a4SMat Martineau 11085f3847a4SMat Martineau switch (move_role) { 11095f3847a4SMat Martineau case L2CAP_MOVE_ROLE_INITIATOR: 11105f3847a4SMat Martineau l2cap_tx(chan, NULL, NULL, L2CAP_EV_EXPLICIT_POLL); 11115f3847a4SMat Martineau chan->rx_state = L2CAP_RX_STATE_WAIT_F; 11125f3847a4SMat Martineau break; 11135f3847a4SMat Martineau case L2CAP_MOVE_ROLE_RESPONDER: 11145f3847a4SMat Martineau chan->rx_state = L2CAP_RX_STATE_WAIT_P; 11155f3847a4SMat Martineau break; 11165f3847a4SMat Martineau } 11175f3847a4SMat Martineau } 11185f3847a4SMat Martineau 11199f0caeb1SVinicius Costa Gomes static void l2cap_chan_ready(struct l2cap_chan *chan) 11209f0caeb1SVinicius Costa Gomes { 11212827011fSMat Martineau /* This clears all conf flags, including CONF_NOT_COMPLETE */ 11229f0caeb1SVinicius Costa Gomes chan->conf_state = 0; 11239f0caeb1SVinicius Costa Gomes __clear_chan_timer(chan); 11249f0caeb1SVinicius Costa Gomes 112554a59aa2SAndrei Emeltchenko chan->state = BT_CONNECTED; 11269f0caeb1SVinicius Costa Gomes 112754a59aa2SAndrei Emeltchenko chan->ops->ready(chan); 11289f0caeb1SVinicius Costa Gomes } 11299f0caeb1SVinicius Costa Gomes 113093c3e8f5SAndrei Emeltchenko static void l2cap_start_connection(struct l2cap_chan *chan) 113193c3e8f5SAndrei Emeltchenko { 113293c3e8f5SAndrei Emeltchenko if (__amp_capable(chan)) { 113393c3e8f5SAndrei Emeltchenko BT_DBG("chan %p AMP capable: discover AMPs", chan); 113493c3e8f5SAndrei Emeltchenko a2mp_discover_amp(chan); 113593c3e8f5SAndrei Emeltchenko } else { 113693c3e8f5SAndrei Emeltchenko l2cap_send_conn_req(chan); 113793c3e8f5SAndrei Emeltchenko } 113893c3e8f5SAndrei Emeltchenko } 113993c3e8f5SAndrei Emeltchenko 1140fc7f8a7eSGustavo F. Padovan static void l2cap_do_start(struct l2cap_chan *chan) 11410a708f8fSGustavo F. Padovan { 11428c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 11430a708f8fSGustavo F. Padovan 11449f0caeb1SVinicius Costa Gomes if (conn->hcon->type == LE_LINK) { 11459f0caeb1SVinicius Costa Gomes l2cap_chan_ready(chan); 11469f0caeb1SVinicius Costa Gomes return; 11479f0caeb1SVinicius Costa Gomes } 11489f0caeb1SVinicius Costa Gomes 11490a708f8fSGustavo F. Padovan if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { 11500a708f8fSGustavo F. Padovan if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) 11510a708f8fSGustavo F. Padovan return; 11520a708f8fSGustavo F. Padovan 1153d45fc423SGustavo F. Padovan if (l2cap_chan_check_security(chan) && 115493c3e8f5SAndrei Emeltchenko __l2cap_no_conn_pending(chan)) { 115593c3e8f5SAndrei Emeltchenko l2cap_start_connection(chan); 115693c3e8f5SAndrei Emeltchenko } 11570a708f8fSGustavo F. Padovan } else { 11580a708f8fSGustavo F. Padovan struct l2cap_info_req req; 1159ac73498cSAndrei Emeltchenko req.type = __constant_cpu_to_le16(L2CAP_IT_FEAT_MASK); 11600a708f8fSGustavo F. Padovan 11610a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; 11620a708f8fSGustavo F. Padovan conn->info_ident = l2cap_get_ident(conn); 11630a708f8fSGustavo F. Padovan 1164ba13ccd9SMarcel Holtmann schedule_delayed_work(&conn->info_timer, L2CAP_INFO_TIMEOUT); 11650a708f8fSGustavo F. Padovan 11662d792818SGustavo Padovan l2cap_send_cmd(conn, conn->info_ident, L2CAP_INFO_REQ, 11672d792818SGustavo Padovan sizeof(req), &req); 11680a708f8fSGustavo F. Padovan } 11690a708f8fSGustavo F. Padovan } 11700a708f8fSGustavo F. Padovan 11710a708f8fSGustavo F. Padovan static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) 11720a708f8fSGustavo F. Padovan { 11730a708f8fSGustavo F. Padovan u32 local_feat_mask = l2cap_feat_mask; 11740a708f8fSGustavo F. Padovan if (!disable_ertm) 11750a708f8fSGustavo F. Padovan local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; 11760a708f8fSGustavo F. Padovan 11770a708f8fSGustavo F. Padovan switch (mode) { 11780a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 11790a708f8fSGustavo F. Padovan return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; 11800a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 11810a708f8fSGustavo F. Padovan return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; 11820a708f8fSGustavo F. Padovan default: 11830a708f8fSGustavo F. Padovan return 0x00; 11840a708f8fSGustavo F. Padovan } 11850a708f8fSGustavo F. Padovan } 11860a708f8fSGustavo F. Padovan 11875e4e3972SAndrei Emeltchenko static void l2cap_send_disconn_req(struct l2cap_chan *chan, int err) 11880a708f8fSGustavo F. Padovan { 11896be36555SAndrei Emeltchenko struct sock *sk = chan->sk; 11905e4e3972SAndrei Emeltchenko struct l2cap_conn *conn = chan->conn; 11910a708f8fSGustavo F. Padovan struct l2cap_disconn_req req; 11920a708f8fSGustavo F. Padovan 11930a708f8fSGustavo F. Padovan if (!conn) 11940a708f8fSGustavo F. Padovan return; 11950a708f8fSGustavo F. Padovan 1196aad3d0e3SAndrei Emeltchenko if (chan->mode == L2CAP_MODE_ERTM && chan->state == BT_CONNECTED) { 11971a09bcb9SGustavo F. Padovan __clear_retrans_timer(chan); 11981a09bcb9SGustavo F. Padovan __clear_monitor_timer(chan); 11991a09bcb9SGustavo F. Padovan __clear_ack_timer(chan); 12000a708f8fSGustavo F. Padovan } 12010a708f8fSGustavo F. Padovan 1202416fa752SAndrei Emeltchenko if (chan->chan_type == L2CAP_CHAN_CONN_FIX_A2MP) { 1203d117773cSGustavo Padovan l2cap_state_change(chan, BT_DISCONN); 1204416fa752SAndrei Emeltchenko return; 1205416fa752SAndrei Emeltchenko } 1206416fa752SAndrei Emeltchenko 1207fe4128e0SGustavo F. Padovan req.dcid = cpu_to_le16(chan->dcid); 1208fe4128e0SGustavo F. Padovan req.scid = cpu_to_le16(chan->scid); 12092d792818SGustavo Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_DISCONN_REQ, 12102d792818SGustavo Padovan sizeof(req), &req); 12110a708f8fSGustavo F. Padovan 12126be36555SAndrei Emeltchenko lock_sock(sk); 12130e587be7SAndrei Emeltchenko __l2cap_state_change(chan, BT_DISCONN); 12142e0052e4SAndrei Emeltchenko __l2cap_chan_set_err(chan, err); 12156be36555SAndrei Emeltchenko release_sock(sk); 12160a708f8fSGustavo F. Padovan } 12170a708f8fSGustavo F. Padovan 12180a708f8fSGustavo F. Padovan /* ---- L2CAP connections ---- */ 12190a708f8fSGustavo F. Padovan static void l2cap_conn_start(struct l2cap_conn *conn) 12200a708f8fSGustavo F. Padovan { 12213df91ea2SAndrei Emeltchenko struct l2cap_chan *chan, *tmp; 12220a708f8fSGustavo F. Padovan 12230a708f8fSGustavo F. Padovan BT_DBG("conn %p", conn); 12240a708f8fSGustavo F. Padovan 12253df91ea2SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 12260a708f8fSGustavo F. Padovan 12273df91ea2SAndrei Emeltchenko list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) { 122848454079SGustavo F. Padovan struct sock *sk = chan->sk; 1229baa7e1faSGustavo F. Padovan 12306be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 12310a708f8fSGustavo F. Padovan 1232715ec005SGustavo F. Padovan if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { 12336be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 12340a708f8fSGustavo F. Padovan continue; 12350a708f8fSGustavo F. Padovan } 12360a708f8fSGustavo F. Padovan 123789bc500eSGustavo F. Padovan if (chan->state == BT_CONNECT) { 1238d45fc423SGustavo F. Padovan if (!l2cap_chan_check_security(chan) || 1239b4450035SGustavo F. Padovan !__l2cap_no_conn_pending(chan)) { 12406be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 12410a708f8fSGustavo F. Padovan continue; 12420a708f8fSGustavo F. Padovan } 12430a708f8fSGustavo F. Padovan 1244c1360a1cSGustavo F. Padovan if (!l2cap_mode_supported(chan->mode, conn->feat_mask) 1245c1360a1cSGustavo F. Padovan && test_bit(CONF_STATE2_DEVICE, 1246c1360a1cSGustavo F. Padovan &chan->conf_state)) { 12470f852724SGustavo F. Padovan l2cap_chan_close(chan, ECONNRESET); 12486be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 12490a708f8fSGustavo F. Padovan continue; 12500a708f8fSGustavo F. Padovan } 12510a708f8fSGustavo F. Padovan 125293c3e8f5SAndrei Emeltchenko l2cap_start_connection(chan); 12530a708f8fSGustavo F. Padovan 125489bc500eSGustavo F. Padovan } else if (chan->state == BT_CONNECT2) { 12550a708f8fSGustavo F. Padovan struct l2cap_conn_rsp rsp; 12560a708f8fSGustavo F. Padovan char buf[128]; 1257fe4128e0SGustavo F. Padovan rsp.scid = cpu_to_le16(chan->dcid); 1258fe4128e0SGustavo F. Padovan rsp.dcid = cpu_to_le16(chan->scid); 12590a708f8fSGustavo F. Padovan 1260d45fc423SGustavo F. Padovan if (l2cap_chan_check_security(chan)) { 12616be36555SAndrei Emeltchenko lock_sock(sk); 1262c5daa683SGustavo Padovan if (test_bit(BT_SK_DEFER_SETUP, 1263c5daa683SGustavo Padovan &bt_sk(sk)->flags)) { 1264ac73498cSAndrei Emeltchenko rsp.result = __constant_cpu_to_le16(L2CAP_CR_PEND); 1265ac73498cSAndrei Emeltchenko rsp.status = __constant_cpu_to_le16(L2CAP_CS_AUTHOR_PEND); 12662dc4e510SGustavo Padovan chan->ops->defer(chan); 12670a708f8fSGustavo F. Padovan 12680a708f8fSGustavo F. Padovan } else { 12690e587be7SAndrei Emeltchenko __l2cap_state_change(chan, BT_CONFIG); 1270ac73498cSAndrei Emeltchenko rsp.result = __constant_cpu_to_le16(L2CAP_CR_SUCCESS); 1271ac73498cSAndrei Emeltchenko rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO); 12720a708f8fSGustavo F. Padovan } 12736be36555SAndrei Emeltchenko release_sock(sk); 12740a708f8fSGustavo F. Padovan } else { 1275ac73498cSAndrei Emeltchenko rsp.result = __constant_cpu_to_le16(L2CAP_CR_PEND); 1276ac73498cSAndrei Emeltchenko rsp.status = __constant_cpu_to_le16(L2CAP_CS_AUTHEN_PEND); 12770a708f8fSGustavo F. Padovan } 12780a708f8fSGustavo F. Padovan 1279fc7f8a7eSGustavo F. Padovan l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, 1280fc7f8a7eSGustavo F. Padovan sizeof(rsp), &rsp); 12810a708f8fSGustavo F. Padovan 1282c1360a1cSGustavo F. Padovan if (test_bit(CONF_REQ_SENT, &chan->conf_state) || 12830a708f8fSGustavo F. Padovan rsp.result != L2CAP_CR_SUCCESS) { 12846be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 12850a708f8fSGustavo F. Padovan continue; 12860a708f8fSGustavo F. Padovan } 12870a708f8fSGustavo F. Padovan 1288c1360a1cSGustavo F. Padovan set_bit(CONF_REQ_SENT, &chan->conf_state); 12890a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, 129073ffa904SGustavo F. Padovan l2cap_build_conf_req(chan, buf), buf); 129173ffa904SGustavo F. Padovan chan->num_conf_req++; 12920a708f8fSGustavo F. Padovan } 12930a708f8fSGustavo F. Padovan 12946be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 12950a708f8fSGustavo F. Padovan } 12960a708f8fSGustavo F. Padovan 12973df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 12980a708f8fSGustavo F. Padovan } 12990a708f8fSGustavo F. Padovan 1300c2287681SIdo Yariv /* Find socket with cid and source/destination bdaddr. 1301b62f328bSVille Tervo * Returns closest match, locked. 1302b62f328bSVille Tervo */ 1303d9b88702SAndrei Emeltchenko static struct l2cap_chan *l2cap_global_chan_by_scid(int state, u16 cid, 1304c2287681SIdo Yariv bdaddr_t *src, 1305c2287681SIdo Yariv bdaddr_t *dst) 1306b62f328bSVille Tervo { 130723691d75SGustavo F. Padovan struct l2cap_chan *c, *c1 = NULL; 1308b62f328bSVille Tervo 130923691d75SGustavo F. Padovan read_lock(&chan_list_lock); 1310b62f328bSVille Tervo 131123691d75SGustavo F. Padovan list_for_each_entry(c, &chan_list, global_l) { 131223691d75SGustavo F. Padovan struct sock *sk = c->sk; 1313fe4128e0SGustavo F. Padovan 131489bc500eSGustavo F. Padovan if (state && c->state != state) 1315b62f328bSVille Tervo continue; 1316b62f328bSVille Tervo 131723691d75SGustavo F. Padovan if (c->scid == cid) { 1318c2287681SIdo Yariv int src_match, dst_match; 1319c2287681SIdo Yariv int src_any, dst_any; 1320c2287681SIdo Yariv 1321b62f328bSVille Tervo /* Exact match. */ 1322c2287681SIdo Yariv src_match = !bacmp(&bt_sk(sk)->src, src); 1323c2287681SIdo Yariv dst_match = !bacmp(&bt_sk(sk)->dst, dst); 1324c2287681SIdo Yariv if (src_match && dst_match) { 132523691d75SGustavo F. Padovan read_unlock(&chan_list_lock); 132623691d75SGustavo F. Padovan return c; 132723691d75SGustavo F. Padovan } 1328b62f328bSVille Tervo 1329b62f328bSVille Tervo /* Closest match */ 1330c2287681SIdo Yariv src_any = !bacmp(&bt_sk(sk)->src, BDADDR_ANY); 1331c2287681SIdo Yariv dst_any = !bacmp(&bt_sk(sk)->dst, BDADDR_ANY); 1332c2287681SIdo Yariv if ((src_match && dst_any) || (src_any && dst_match) || 1333c2287681SIdo Yariv (src_any && dst_any)) 133423691d75SGustavo F. Padovan c1 = c; 1335b62f328bSVille Tervo } 1336b62f328bSVille Tervo } 1337280f294fSGustavo F. Padovan 133823691d75SGustavo F. Padovan read_unlock(&chan_list_lock); 1339b62f328bSVille Tervo 134023691d75SGustavo F. Padovan return c1; 1341b62f328bSVille Tervo } 1342b62f328bSVille Tervo 1343b62f328bSVille Tervo static void l2cap_le_conn_ready(struct l2cap_conn *conn) 1344b62f328bSVille Tervo { 134560bac184SJohan Hedberg struct sock *parent; 134623691d75SGustavo F. Padovan struct l2cap_chan *chan, *pchan; 1347b62f328bSVille Tervo 1348b62f328bSVille Tervo BT_DBG(""); 1349b62f328bSVille Tervo 1350b62f328bSVille Tervo /* Check if we have socket listening on cid */ 1351073d1cf3SJohan Hedberg pchan = l2cap_global_chan_by_scid(BT_LISTEN, L2CAP_CID_ATT, 1352c2287681SIdo Yariv conn->src, conn->dst); 135323691d75SGustavo F. Padovan if (!pchan) 1354b62f328bSVille Tervo return; 1355b62f328bSVille Tervo 135623691d75SGustavo F. Padovan parent = pchan->sk; 135723691d75SGustavo F. Padovan 1358aa2ac881SGustavo F. Padovan lock_sock(parent); 135962f3a2cfSGustavo F. Padovan 136080b98027SGustavo Padovan chan = pchan->ops->new_connection(pchan); 136180808e43SGustavo F. Padovan if (!chan) 1362b62f328bSVille Tervo goto clean; 1363b62f328bSVille Tervo 13649f22398cSJohan Hedberg chan->dcid = L2CAP_CID_ATT; 13659f22398cSJohan Hedberg 1366a9ea3ed9SSzymon Janc conn->hcon->disc_timeout = HCI_DISCONN_TIMEOUT; 1367b62f328bSVille Tervo 136860bac184SJohan Hedberg bacpy(&bt_sk(chan->sk)->src, conn->src); 136960bac184SJohan Hedberg bacpy(&bt_sk(chan->sk)->dst, conn->dst); 1370b62f328bSVille Tervo 13713d57dc68SGustavo F. Padovan l2cap_chan_add(conn, chan); 137248454079SGustavo F. Padovan 1373b62f328bSVille Tervo clean: 1374aa2ac881SGustavo F. Padovan release_sock(parent); 1375b62f328bSVille Tervo } 1376b62f328bSVille Tervo 13770a708f8fSGustavo F. Padovan static void l2cap_conn_ready(struct l2cap_conn *conn) 13780a708f8fSGustavo F. Padovan { 137948454079SGustavo F. Padovan struct l2cap_chan *chan; 1380cc110922SVinicius Costa Gomes struct hci_conn *hcon = conn->hcon; 13810a708f8fSGustavo F. Padovan 13820a708f8fSGustavo F. Padovan BT_DBG("conn %p", conn); 13830a708f8fSGustavo F. Padovan 1384cc110922SVinicius Costa Gomes if (!hcon->out && hcon->type == LE_LINK) 1385b62f328bSVille Tervo l2cap_le_conn_ready(conn); 1386b62f328bSVille Tervo 1387d8729922SJohan Hedberg /* For outgoing pairing which doesn't necessarily have an 1388d8729922SJohan Hedberg * associated socket (e.g. mgmt_pair_device). 1389d8729922SJohan Hedberg */ 1390cc110922SVinicius Costa Gomes if (hcon->out && hcon->type == LE_LINK) 1391cc110922SVinicius Costa Gomes smp_conn_security(hcon, hcon->pending_sec_level); 1392160dc6acSVinicius Costa Gomes 13933df91ea2SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 13940a708f8fSGustavo F. Padovan 13953df91ea2SAndrei Emeltchenko list_for_each_entry(chan, &conn->chan_l, list) { 1396baa7e1faSGustavo F. Padovan 13976be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 13980a708f8fSGustavo F. Padovan 1399416fa752SAndrei Emeltchenko if (chan->chan_type == L2CAP_CHAN_CONN_FIX_A2MP) { 1400416fa752SAndrei Emeltchenko l2cap_chan_unlock(chan); 1401416fa752SAndrei Emeltchenko continue; 1402416fa752SAndrei Emeltchenko } 1403416fa752SAndrei Emeltchenko 1404cc110922SVinicius Costa Gomes if (hcon->type == LE_LINK) { 1405cc110922SVinicius Costa Gomes if (smp_conn_security(hcon, chan->sec_level)) 1406cf4cd009SAndrei Emeltchenko l2cap_chan_ready(chan); 1407acd7d370SVille Tervo 140863128451SVinicius Costa Gomes } else if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { 14096be36555SAndrei Emeltchenko struct sock *sk = chan->sk; 1410c9b66675SGustavo F. Padovan __clear_chan_timer(chan); 14116be36555SAndrei Emeltchenko lock_sock(sk); 14120e587be7SAndrei Emeltchenko __l2cap_state_change(chan, BT_CONNECTED); 14130a708f8fSGustavo F. Padovan sk->sk_state_change(sk); 14146be36555SAndrei Emeltchenko release_sock(sk); 1415b501d6a1SAnderson Briglia 141689bc500eSGustavo F. Padovan } else if (chan->state == BT_CONNECT) 1417fc7f8a7eSGustavo F. Padovan l2cap_do_start(chan); 14180a708f8fSGustavo F. Padovan 14196be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 14200a708f8fSGustavo F. Padovan } 14210a708f8fSGustavo F. Padovan 14223df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 14230a708f8fSGustavo F. Padovan } 14240a708f8fSGustavo F. Padovan 14250a708f8fSGustavo F. Padovan /* Notify sockets that we cannot guaranty reliability anymore */ 14260a708f8fSGustavo F. Padovan static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) 14270a708f8fSGustavo F. Padovan { 142848454079SGustavo F. Padovan struct l2cap_chan *chan; 14290a708f8fSGustavo F. Padovan 14300a708f8fSGustavo F. Padovan BT_DBG("conn %p", conn); 14310a708f8fSGustavo F. Padovan 14323df91ea2SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 14330a708f8fSGustavo F. Padovan 14343df91ea2SAndrei Emeltchenko list_for_each_entry(chan, &conn->chan_l, list) { 1435ecf61bdbSAndrei Emeltchenko if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) 14361d8b1fd5SGustavo Padovan l2cap_chan_set_err(chan, err); 14370a708f8fSGustavo F. Padovan } 14380a708f8fSGustavo F. Padovan 14393df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 14400a708f8fSGustavo F. Padovan } 14410a708f8fSGustavo F. Padovan 1442f878fcadSGustavo F. Padovan static void l2cap_info_timeout(struct work_struct *work) 14430a708f8fSGustavo F. Padovan { 1444f878fcadSGustavo F. Padovan struct l2cap_conn *conn = container_of(work, struct l2cap_conn, 1445030013d8SGustavo F. Padovan info_timer.work); 14460a708f8fSGustavo F. Padovan 14470a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; 14480a708f8fSGustavo F. Padovan conn->info_ident = 0; 14490a708f8fSGustavo F. Padovan 14500a708f8fSGustavo F. Padovan l2cap_conn_start(conn); 14510a708f8fSGustavo F. Padovan } 14520a708f8fSGustavo F. Padovan 14532c8e1411SDavid Herrmann /* 14542c8e1411SDavid Herrmann * l2cap_user 14552c8e1411SDavid Herrmann * External modules can register l2cap_user objects on l2cap_conn. The ->probe 14562c8e1411SDavid Herrmann * callback is called during registration. The ->remove callback is called 14572c8e1411SDavid Herrmann * during unregistration. 14582c8e1411SDavid Herrmann * An l2cap_user object can either be explicitly unregistered or when the 14592c8e1411SDavid Herrmann * underlying l2cap_conn object is deleted. This guarantees that l2cap->hcon, 14602c8e1411SDavid Herrmann * l2cap->hchan, .. are valid as long as the remove callback hasn't been called. 14612c8e1411SDavid Herrmann * External modules must own a reference to the l2cap_conn object if they intend 14622c8e1411SDavid Herrmann * to call l2cap_unregister_user(). The l2cap_conn object might get destroyed at 14632c8e1411SDavid Herrmann * any time if they don't. 14642c8e1411SDavid Herrmann */ 14652c8e1411SDavid Herrmann 14662c8e1411SDavid Herrmann int l2cap_register_user(struct l2cap_conn *conn, struct l2cap_user *user) 14672c8e1411SDavid Herrmann { 14682c8e1411SDavid Herrmann struct hci_dev *hdev = conn->hcon->hdev; 14692c8e1411SDavid Herrmann int ret; 14702c8e1411SDavid Herrmann 14712c8e1411SDavid Herrmann /* We need to check whether l2cap_conn is registered. If it is not, we 14722c8e1411SDavid Herrmann * must not register the l2cap_user. l2cap_conn_del() is unregisters 14732c8e1411SDavid Herrmann * l2cap_conn objects, but doesn't provide its own locking. Instead, it 14742c8e1411SDavid Herrmann * relies on the parent hci_conn object to be locked. This itself relies 14752c8e1411SDavid Herrmann * on the hci_dev object to be locked. So we must lock the hci device 14762c8e1411SDavid Herrmann * here, too. */ 14772c8e1411SDavid Herrmann 14782c8e1411SDavid Herrmann hci_dev_lock(hdev); 14792c8e1411SDavid Herrmann 14802c8e1411SDavid Herrmann if (user->list.next || user->list.prev) { 14812c8e1411SDavid Herrmann ret = -EINVAL; 14822c8e1411SDavid Herrmann goto out_unlock; 14832c8e1411SDavid Herrmann } 14842c8e1411SDavid Herrmann 14852c8e1411SDavid Herrmann /* conn->hchan is NULL after l2cap_conn_del() was called */ 14862c8e1411SDavid Herrmann if (!conn->hchan) { 14872c8e1411SDavid Herrmann ret = -ENODEV; 14882c8e1411SDavid Herrmann goto out_unlock; 14892c8e1411SDavid Herrmann } 14902c8e1411SDavid Herrmann 14912c8e1411SDavid Herrmann ret = user->probe(conn, user); 14922c8e1411SDavid Herrmann if (ret) 14932c8e1411SDavid Herrmann goto out_unlock; 14942c8e1411SDavid Herrmann 14952c8e1411SDavid Herrmann list_add(&user->list, &conn->users); 14962c8e1411SDavid Herrmann ret = 0; 14972c8e1411SDavid Herrmann 14982c8e1411SDavid Herrmann out_unlock: 14992c8e1411SDavid Herrmann hci_dev_unlock(hdev); 15002c8e1411SDavid Herrmann return ret; 15012c8e1411SDavid Herrmann } 15022c8e1411SDavid Herrmann EXPORT_SYMBOL(l2cap_register_user); 15032c8e1411SDavid Herrmann 15042c8e1411SDavid Herrmann void l2cap_unregister_user(struct l2cap_conn *conn, struct l2cap_user *user) 15052c8e1411SDavid Herrmann { 15062c8e1411SDavid Herrmann struct hci_dev *hdev = conn->hcon->hdev; 15072c8e1411SDavid Herrmann 15082c8e1411SDavid Herrmann hci_dev_lock(hdev); 15092c8e1411SDavid Herrmann 15102c8e1411SDavid Herrmann if (!user->list.next || !user->list.prev) 15112c8e1411SDavid Herrmann goto out_unlock; 15122c8e1411SDavid Herrmann 15132c8e1411SDavid Herrmann list_del(&user->list); 15142c8e1411SDavid Herrmann user->list.next = NULL; 15152c8e1411SDavid Herrmann user->list.prev = NULL; 15162c8e1411SDavid Herrmann user->remove(conn, user); 15172c8e1411SDavid Herrmann 15182c8e1411SDavid Herrmann out_unlock: 15192c8e1411SDavid Herrmann hci_dev_unlock(hdev); 15202c8e1411SDavid Herrmann } 15212c8e1411SDavid Herrmann EXPORT_SYMBOL(l2cap_unregister_user); 15222c8e1411SDavid Herrmann 15232c8e1411SDavid Herrmann static void l2cap_unregister_all_users(struct l2cap_conn *conn) 15242c8e1411SDavid Herrmann { 15252c8e1411SDavid Herrmann struct l2cap_user *user; 15262c8e1411SDavid Herrmann 15272c8e1411SDavid Herrmann while (!list_empty(&conn->users)) { 15282c8e1411SDavid Herrmann user = list_first_entry(&conn->users, struct l2cap_user, list); 15292c8e1411SDavid Herrmann list_del(&user->list); 15302c8e1411SDavid Herrmann user->list.next = NULL; 15312c8e1411SDavid Herrmann user->list.prev = NULL; 15322c8e1411SDavid Herrmann user->remove(conn, user); 15332c8e1411SDavid Herrmann } 15342c8e1411SDavid Herrmann } 15352c8e1411SDavid Herrmann 15365d3de7dfSVinicius Costa Gomes static void l2cap_conn_del(struct hci_conn *hcon, int err) 15375d3de7dfSVinicius Costa Gomes { 15385d3de7dfSVinicius Costa Gomes struct l2cap_conn *conn = hcon->l2cap_data; 15395d3de7dfSVinicius Costa Gomes struct l2cap_chan *chan, *l; 15405d3de7dfSVinicius Costa Gomes 15415d3de7dfSVinicius Costa Gomes if (!conn) 15425d3de7dfSVinicius Costa Gomes return; 15435d3de7dfSVinicius Costa Gomes 15445d3de7dfSVinicius Costa Gomes BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); 15455d3de7dfSVinicius Costa Gomes 15465d3de7dfSVinicius Costa Gomes kfree_skb(conn->rx_skb); 15475d3de7dfSVinicius Costa Gomes 15482c8e1411SDavid Herrmann l2cap_unregister_all_users(conn); 15492c8e1411SDavid Herrmann 15503df91ea2SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 15513df91ea2SAndrei Emeltchenko 15525d3de7dfSVinicius Costa Gomes /* Kill channels */ 15535d3de7dfSVinicius Costa Gomes list_for_each_entry_safe(chan, l, &conn->chan_l, list) { 155461d6ef3eSMat Martineau l2cap_chan_hold(chan); 15556be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 15566be36555SAndrei Emeltchenko 15575d3de7dfSVinicius Costa Gomes l2cap_chan_del(chan, err); 15586be36555SAndrei Emeltchenko 15596be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 15606be36555SAndrei Emeltchenko 156180b98027SGustavo Padovan chan->ops->close(chan); 156261d6ef3eSMat Martineau l2cap_chan_put(chan); 15635d3de7dfSVinicius Costa Gomes } 15645d3de7dfSVinicius Costa Gomes 15653df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 15663df91ea2SAndrei Emeltchenko 156773d80debSLuiz Augusto von Dentz hci_chan_del(conn->hchan); 156873d80debSLuiz Augusto von Dentz 15695d3de7dfSVinicius Costa Gomes if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) 1570127074bfSUlisses Furquim cancel_delayed_work_sync(&conn->info_timer); 15715d3de7dfSVinicius Costa Gomes 157251a8efd7SJohan Hedberg if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->flags)) { 1573127074bfSUlisses Furquim cancel_delayed_work_sync(&conn->security_timer); 15748aab4757SVinicius Costa Gomes smp_chan_destroy(conn); 1575d26a2345SVinicius Costa Gomes } 15765d3de7dfSVinicius Costa Gomes 15775d3de7dfSVinicius Costa Gomes hcon->l2cap_data = NULL; 15789c903e37SDavid Herrmann conn->hchan = NULL; 15799c903e37SDavid Herrmann l2cap_conn_put(conn); 15805d3de7dfSVinicius Costa Gomes } 15815d3de7dfSVinicius Costa Gomes 15826c9d42a1SGustavo F. Padovan static void security_timeout(struct work_struct *work) 15835d3de7dfSVinicius Costa Gomes { 15846c9d42a1SGustavo F. Padovan struct l2cap_conn *conn = container_of(work, struct l2cap_conn, 15856c9d42a1SGustavo F. Padovan security_timer.work); 15865d3de7dfSVinicius Costa Gomes 1587d06cc416SJohan Hedberg BT_DBG("conn %p", conn); 1588d06cc416SJohan Hedberg 1589d06cc416SJohan Hedberg if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &conn->hcon->flags)) { 1590d06cc416SJohan Hedberg smp_chan_destroy(conn); 15915d3de7dfSVinicius Costa Gomes l2cap_conn_del(conn->hcon, ETIMEDOUT); 15925d3de7dfSVinicius Costa Gomes } 1593d06cc416SJohan Hedberg } 15945d3de7dfSVinicius Costa Gomes 1595baf43251SClaudio Takahasi static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon) 15960a708f8fSGustavo F. Padovan { 15970a708f8fSGustavo F. Padovan struct l2cap_conn *conn = hcon->l2cap_data; 159873d80debSLuiz Augusto von Dentz struct hci_chan *hchan; 15990a708f8fSGustavo F. Padovan 1600baf43251SClaudio Takahasi if (conn) 16010a708f8fSGustavo F. Padovan return conn; 16020a708f8fSGustavo F. Padovan 160373d80debSLuiz Augusto von Dentz hchan = hci_chan_create(hcon); 160473d80debSLuiz Augusto von Dentz if (!hchan) 16050a708f8fSGustavo F. Padovan return NULL; 16060a708f8fSGustavo F. Padovan 16078bcde1f2SGustavo Padovan conn = kzalloc(sizeof(struct l2cap_conn), GFP_KERNEL); 160873d80debSLuiz Augusto von Dentz if (!conn) { 160973d80debSLuiz Augusto von Dentz hci_chan_del(hchan); 161073d80debSLuiz Augusto von Dentz return NULL; 161173d80debSLuiz Augusto von Dentz } 161273d80debSLuiz Augusto von Dentz 16139c903e37SDavid Herrmann kref_init(&conn->ref); 16140a708f8fSGustavo F. Padovan hcon->l2cap_data = conn; 16150a708f8fSGustavo F. Padovan conn->hcon = hcon; 16169c903e37SDavid Herrmann hci_conn_get(conn->hcon); 161773d80debSLuiz Augusto von Dentz conn->hchan = hchan; 16180a708f8fSGustavo F. Padovan 161973d80debSLuiz Augusto von Dentz BT_DBG("hcon %p conn %p hchan %p", hcon, conn, hchan); 16200a708f8fSGustavo F. Padovan 1621dcc042d5SAndrei Emeltchenko switch (hcon->type) { 1622dcc042d5SAndrei Emeltchenko case LE_LINK: 1623dcc042d5SAndrei Emeltchenko if (hcon->hdev->le_mtu) { 1624acd7d370SVille Tervo conn->mtu = hcon->hdev->le_mtu; 1625dcc042d5SAndrei Emeltchenko break; 1626dcc042d5SAndrei Emeltchenko } 1627dcc042d5SAndrei Emeltchenko /* fall through */ 1628dcc042d5SAndrei Emeltchenko default: 16290a708f8fSGustavo F. Padovan conn->mtu = hcon->hdev->acl_mtu; 1630dcc042d5SAndrei Emeltchenko break; 1631dcc042d5SAndrei Emeltchenko } 1632acd7d370SVille Tervo 16330a708f8fSGustavo F. Padovan conn->src = &hcon->hdev->bdaddr; 16340a708f8fSGustavo F. Padovan conn->dst = &hcon->dst; 16350a708f8fSGustavo F. Padovan 16360a708f8fSGustavo F. Padovan conn->feat_mask = 0; 16370a708f8fSGustavo F. Padovan 16380a708f8fSGustavo F. Padovan spin_lock_init(&conn->lock); 16393df91ea2SAndrei Emeltchenko mutex_init(&conn->chan_lock); 1640baa7e1faSGustavo F. Padovan 1641baa7e1faSGustavo F. Padovan INIT_LIST_HEAD(&conn->chan_l); 16422c8e1411SDavid Herrmann INIT_LIST_HEAD(&conn->users); 16430a708f8fSGustavo F. Padovan 16445d3de7dfSVinicius Costa Gomes if (hcon->type == LE_LINK) 16456c9d42a1SGustavo F. Padovan INIT_DELAYED_WORK(&conn->security_timer, security_timeout); 16465d3de7dfSVinicius Costa Gomes else 1647030013d8SGustavo F. Padovan INIT_DELAYED_WORK(&conn->info_timer, l2cap_info_timeout); 16480a708f8fSGustavo F. Padovan 16499f5a0d7bSAndrei Emeltchenko conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM; 16500a708f8fSGustavo F. Padovan 16510a708f8fSGustavo F. Padovan return conn; 16520a708f8fSGustavo F. Padovan } 16530a708f8fSGustavo F. Padovan 16549c903e37SDavid Herrmann static void l2cap_conn_free(struct kref *ref) 16559c903e37SDavid Herrmann { 16569c903e37SDavid Herrmann struct l2cap_conn *conn = container_of(ref, struct l2cap_conn, ref); 16579c903e37SDavid Herrmann 16589c903e37SDavid Herrmann hci_conn_put(conn->hcon); 16599c903e37SDavid Herrmann kfree(conn); 16609c903e37SDavid Herrmann } 16619c903e37SDavid Herrmann 16629c903e37SDavid Herrmann void l2cap_conn_get(struct l2cap_conn *conn) 16639c903e37SDavid Herrmann { 16649c903e37SDavid Herrmann kref_get(&conn->ref); 16659c903e37SDavid Herrmann } 16669c903e37SDavid Herrmann EXPORT_SYMBOL(l2cap_conn_get); 16679c903e37SDavid Herrmann 16689c903e37SDavid Herrmann void l2cap_conn_put(struct l2cap_conn *conn) 16699c903e37SDavid Herrmann { 16709c903e37SDavid Herrmann kref_put(&conn->ref, l2cap_conn_free); 16719c903e37SDavid Herrmann } 16729c903e37SDavid Herrmann EXPORT_SYMBOL(l2cap_conn_put); 16739c903e37SDavid Herrmann 16740a708f8fSGustavo F. Padovan /* ---- Socket interface ---- */ 16750a708f8fSGustavo F. Padovan 1676c2287681SIdo Yariv /* Find socket with psm and source / destination bdaddr. 16770a708f8fSGustavo F. Padovan * Returns closest match. 16780a708f8fSGustavo F. Padovan */ 1679c2287681SIdo Yariv static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm, 1680c2287681SIdo Yariv bdaddr_t *src, 1681c2287681SIdo Yariv bdaddr_t *dst) 16820a708f8fSGustavo F. Padovan { 168323691d75SGustavo F. Padovan struct l2cap_chan *c, *c1 = NULL; 16840a708f8fSGustavo F. Padovan 168523691d75SGustavo F. Padovan read_lock(&chan_list_lock); 16860a708f8fSGustavo F. Padovan 168723691d75SGustavo F. Padovan list_for_each_entry(c, &chan_list, global_l) { 168823691d75SGustavo F. Padovan struct sock *sk = c->sk; 1689fe4128e0SGustavo F. Padovan 169089bc500eSGustavo F. Padovan if (state && c->state != state) 16910a708f8fSGustavo F. Padovan continue; 16920a708f8fSGustavo F. Padovan 169323691d75SGustavo F. Padovan if (c->psm == psm) { 1694c2287681SIdo Yariv int src_match, dst_match; 1695c2287681SIdo Yariv int src_any, dst_any; 1696c2287681SIdo Yariv 16970a708f8fSGustavo F. Padovan /* Exact match. */ 1698c2287681SIdo Yariv src_match = !bacmp(&bt_sk(sk)->src, src); 1699c2287681SIdo Yariv dst_match = !bacmp(&bt_sk(sk)->dst, dst); 1700c2287681SIdo Yariv if (src_match && dst_match) { 1701a7567b20SJohannes Berg read_unlock(&chan_list_lock); 170223691d75SGustavo F. Padovan return c; 170323691d75SGustavo F. Padovan } 17040a708f8fSGustavo F. Padovan 17050a708f8fSGustavo F. Padovan /* Closest match */ 1706c2287681SIdo Yariv src_any = !bacmp(&bt_sk(sk)->src, BDADDR_ANY); 1707c2287681SIdo Yariv dst_any = !bacmp(&bt_sk(sk)->dst, BDADDR_ANY); 1708c2287681SIdo Yariv if ((src_match && dst_any) || (src_any && dst_match) || 1709c2287681SIdo Yariv (src_any && dst_any)) 171023691d75SGustavo F. Padovan c1 = c; 17110a708f8fSGustavo F. Padovan } 17120a708f8fSGustavo F. Padovan } 17130a708f8fSGustavo F. Padovan 171423691d75SGustavo F. Padovan read_unlock(&chan_list_lock); 17150a708f8fSGustavo F. Padovan 171623691d75SGustavo F. Padovan return c1; 17170a708f8fSGustavo F. Padovan } 17180a708f8fSGustavo F. Padovan 17198e9f9892SAndre Guedes int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, 17208e9f9892SAndre Guedes bdaddr_t *dst, u8 dst_type) 17210a708f8fSGustavo F. Padovan { 17225d41ce1dSGustavo F. Padovan struct sock *sk = chan->sk; 17230a708f8fSGustavo F. Padovan bdaddr_t *src = &bt_sk(sk)->src; 17240a708f8fSGustavo F. Padovan struct l2cap_conn *conn; 17250a708f8fSGustavo F. Padovan struct hci_conn *hcon; 17260a708f8fSGustavo F. Padovan struct hci_dev *hdev; 17270a708f8fSGustavo F. Padovan __u8 auth_type; 17280a708f8fSGustavo F. Padovan int err; 17290a708f8fSGustavo F. Padovan 17306ed93dc6SAndrei Emeltchenko BT_DBG("%pMR -> %pMR (type %u) psm 0x%2.2x", src, dst, 1731ab19516aSSyam Sidhardhan dst_type, __le16_to_cpu(psm)); 17320a708f8fSGustavo F. Padovan 17330a708f8fSGustavo F. Padovan hdev = hci_get_route(dst, src); 17340a708f8fSGustavo F. Padovan if (!hdev) 17350a708f8fSGustavo F. Padovan return -EHOSTUNREACH; 17360a708f8fSGustavo F. Padovan 173709fd0de5SGustavo F. Padovan hci_dev_lock(hdev); 17380a708f8fSGustavo F. Padovan 17396be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 174003a00194SGustavo F. Padovan 174103a00194SGustavo F. Padovan /* PSM must be odd and lsb of upper byte must be 0 */ 174203a00194SGustavo F. Padovan if ((__le16_to_cpu(psm) & 0x0101) != 0x0001 && !cid && 174303a00194SGustavo F. Padovan chan->chan_type != L2CAP_CHAN_RAW) { 174403a00194SGustavo F. Padovan err = -EINVAL; 174503a00194SGustavo F. Padovan goto done; 174603a00194SGustavo F. Padovan } 174703a00194SGustavo F. Padovan 174803a00194SGustavo F. Padovan if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && !(psm || cid)) { 174903a00194SGustavo F. Padovan err = -EINVAL; 175003a00194SGustavo F. Padovan goto done; 175103a00194SGustavo F. Padovan } 175203a00194SGustavo F. Padovan 175303a00194SGustavo F. Padovan switch (chan->mode) { 175403a00194SGustavo F. Padovan case L2CAP_MODE_BASIC: 175503a00194SGustavo F. Padovan break; 175603a00194SGustavo F. Padovan case L2CAP_MODE_ERTM: 175703a00194SGustavo F. Padovan case L2CAP_MODE_STREAMING: 175803a00194SGustavo F. Padovan if (!disable_ertm) 175903a00194SGustavo F. Padovan break; 176003a00194SGustavo F. Padovan /* fall through */ 176103a00194SGustavo F. Padovan default: 176203a00194SGustavo F. Padovan err = -ENOTSUPP; 176303a00194SGustavo F. Padovan goto done; 176403a00194SGustavo F. Padovan } 176503a00194SGustavo F. Padovan 17660797e01dSGustavo Padovan switch (chan->state) { 176703a00194SGustavo F. Padovan case BT_CONNECT: 176803a00194SGustavo F. Padovan case BT_CONNECT2: 176903a00194SGustavo F. Padovan case BT_CONFIG: 177003a00194SGustavo F. Padovan /* Already connecting */ 177103a00194SGustavo F. Padovan err = 0; 177203a00194SGustavo F. Padovan goto done; 177303a00194SGustavo F. Padovan 177403a00194SGustavo F. Padovan case BT_CONNECTED: 177503a00194SGustavo F. Padovan /* Already connected */ 177603a00194SGustavo F. Padovan err = -EISCONN; 177703a00194SGustavo F. Padovan goto done; 177803a00194SGustavo F. Padovan 177903a00194SGustavo F. Padovan case BT_OPEN: 178003a00194SGustavo F. Padovan case BT_BOUND: 178103a00194SGustavo F. Padovan /* Can connect */ 178203a00194SGustavo F. Padovan break; 178303a00194SGustavo F. Padovan 178403a00194SGustavo F. Padovan default: 178503a00194SGustavo F. Padovan err = -EBADFD; 178603a00194SGustavo F. Padovan goto done; 178703a00194SGustavo F. Padovan } 178803a00194SGustavo F. Padovan 178903a00194SGustavo F. Padovan /* Set destination address and psm */ 17900797e01dSGustavo Padovan lock_sock(sk); 17919219b2a0SGustavo F. Padovan bacpy(&bt_sk(sk)->dst, dst); 17926be36555SAndrei Emeltchenko release_sock(sk); 17936be36555SAndrei Emeltchenko 179403a00194SGustavo F. Padovan chan->psm = psm; 179503a00194SGustavo F. Padovan chan->dcid = cid; 17960a708f8fSGustavo F. Padovan 17974343478fSGustavo F. Padovan auth_type = l2cap_get_auth_type(chan); 17980a708f8fSGustavo F. Padovan 1799f224ca5fSJohan Hedberg if (bdaddr_type_is_le(dst_type)) 18008e9f9892SAndre Guedes hcon = hci_connect(hdev, LE_LINK, dst, dst_type, 18014343478fSGustavo F. Padovan chan->sec_level, auth_type); 1802acd7d370SVille Tervo else 18038e9f9892SAndre Guedes hcon = hci_connect(hdev, ACL_LINK, dst, dst_type, 18044343478fSGustavo F. Padovan chan->sec_level, auth_type); 1805acd7d370SVille Tervo 180630e76272SVille Tervo if (IS_ERR(hcon)) { 180730e76272SVille Tervo err = PTR_ERR(hcon); 18080a708f8fSGustavo F. Padovan goto done; 180930e76272SVille Tervo } 18100a708f8fSGustavo F. Padovan 1811baf43251SClaudio Takahasi conn = l2cap_conn_add(hcon); 18120a708f8fSGustavo F. Padovan if (!conn) { 181376a68ba0SDavid Herrmann hci_conn_drop(hcon); 181430e76272SVille Tervo err = -ENOMEM; 18150a708f8fSGustavo F. Padovan goto done; 18160a708f8fSGustavo F. Padovan } 18170a708f8fSGustavo F. Padovan 1818141d5706SJohan Hedberg if (cid && __l2cap_get_chan_by_dcid(conn, cid)) { 181976a68ba0SDavid Herrmann hci_conn_drop(hcon); 1820141d5706SJohan Hedberg err = -EBUSY; 18219f0caeb1SVinicius Costa Gomes goto done; 18229f0caeb1SVinicius Costa Gomes } 18239f0caeb1SVinicius Costa Gomes 18240a708f8fSGustavo F. Padovan /* Update source addr of the socket */ 18250a708f8fSGustavo F. Padovan bacpy(src, conn->src); 18260a708f8fSGustavo F. Padovan 18276be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 182848454079SGustavo F. Padovan l2cap_chan_add(conn, chan); 18296be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 183048454079SGustavo F. Padovan 18315ee9891dSJohan Hedberg /* l2cap_chan_add takes its own ref so we can drop this one */ 18325ee9891dSJohan Hedberg hci_conn_drop(hcon); 18335ee9891dSJohan Hedberg 18346be36555SAndrei Emeltchenko l2cap_state_change(chan, BT_CONNECT); 1835c9b66675SGustavo F. Padovan __set_chan_timer(chan, sk->sk_sndtimeo); 18360a708f8fSGustavo F. Padovan 18370a708f8fSGustavo F. Padovan if (hcon->state == BT_CONNECTED) { 1838715ec005SGustavo F. Padovan if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { 1839c9b66675SGustavo F. Padovan __clear_chan_timer(chan); 1840d45fc423SGustavo F. Padovan if (l2cap_chan_check_security(chan)) 18416be36555SAndrei Emeltchenko l2cap_state_change(chan, BT_CONNECTED); 18420a708f8fSGustavo F. Padovan } else 1843fc7f8a7eSGustavo F. Padovan l2cap_do_start(chan); 18440a708f8fSGustavo F. Padovan } 18450a708f8fSGustavo F. Padovan 184630e76272SVille Tervo err = 0; 184730e76272SVille Tervo 18480a708f8fSGustavo F. Padovan done: 18496be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 185009fd0de5SGustavo F. Padovan hci_dev_unlock(hdev); 18510a708f8fSGustavo F. Padovan hci_dev_put(hdev); 18520a708f8fSGustavo F. Padovan return err; 18530a708f8fSGustavo F. Padovan } 18540a708f8fSGustavo F. Padovan 1855dcba0dbaSGustavo F. Padovan int __l2cap_wait_ack(struct sock *sk) 18560a708f8fSGustavo F. Padovan { 18578c1d787bSGustavo F. Padovan struct l2cap_chan *chan = l2cap_pi(sk)->chan; 18580a708f8fSGustavo F. Padovan DECLARE_WAITQUEUE(wait, current); 18590a708f8fSGustavo F. Padovan int err = 0; 18600a708f8fSGustavo F. Padovan int timeo = HZ/5; 18610a708f8fSGustavo F. Padovan 18620a708f8fSGustavo F. Padovan add_wait_queue(sk_sleep(sk), &wait); 18630a708f8fSGustavo F. Padovan set_current_state(TASK_INTERRUPTIBLE); 1864a71a0cf4SPeter Hurley while (chan->unacked_frames > 0 && chan->conn) { 18650a708f8fSGustavo F. Padovan if (!timeo) 18660a708f8fSGustavo F. Padovan timeo = HZ/5; 18670a708f8fSGustavo F. Padovan 18680a708f8fSGustavo F. Padovan if (signal_pending(current)) { 18690a708f8fSGustavo F. Padovan err = sock_intr_errno(timeo); 18700a708f8fSGustavo F. Padovan break; 18710a708f8fSGustavo F. Padovan } 18720a708f8fSGustavo F. Padovan 18730a708f8fSGustavo F. Padovan release_sock(sk); 18740a708f8fSGustavo F. Padovan timeo = schedule_timeout(timeo); 18750a708f8fSGustavo F. Padovan lock_sock(sk); 1876a71a0cf4SPeter Hurley set_current_state(TASK_INTERRUPTIBLE); 18770a708f8fSGustavo F. Padovan 18780a708f8fSGustavo F. Padovan err = sock_error(sk); 18790a708f8fSGustavo F. Padovan if (err) 18800a708f8fSGustavo F. Padovan break; 18810a708f8fSGustavo F. Padovan } 18820a708f8fSGustavo F. Padovan set_current_state(TASK_RUNNING); 18830a708f8fSGustavo F. Padovan remove_wait_queue(sk_sleep(sk), &wait); 18840a708f8fSGustavo F. Padovan return err; 18850a708f8fSGustavo F. Padovan } 18860a708f8fSGustavo F. Padovan 1887721c4181SGustavo F. Padovan static void l2cap_monitor_timeout(struct work_struct *work) 18880a708f8fSGustavo F. Padovan { 1889721c4181SGustavo F. Padovan struct l2cap_chan *chan = container_of(work, struct l2cap_chan, 1890721c4181SGustavo F. Padovan monitor_timer.work); 18910a708f8fSGustavo F. Padovan 1892525cd185SGustavo F. Padovan BT_DBG("chan %p", chan); 18930a708f8fSGustavo F. Padovan 18946be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 18956be36555SAndrei Emeltchenko 189680909e04SMat Martineau if (!chan->conn) { 18976be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 18988d7e1c7fSAndrei Emeltchenko l2cap_chan_put(chan); 18990a708f8fSGustavo F. Padovan return; 19000a708f8fSGustavo F. Padovan } 19010a708f8fSGustavo F. Padovan 1902401bb1f7SAndrei Emeltchenko l2cap_tx(chan, NULL, NULL, L2CAP_EV_MONITOR_TO); 19030a708f8fSGustavo F. Padovan 19046be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 19058d7e1c7fSAndrei Emeltchenko l2cap_chan_put(chan); 19060a708f8fSGustavo F. Padovan } 19070a708f8fSGustavo F. Padovan 1908721c4181SGustavo F. Padovan static void l2cap_retrans_timeout(struct work_struct *work) 19090a708f8fSGustavo F. Padovan { 1910721c4181SGustavo F. Padovan struct l2cap_chan *chan = container_of(work, struct l2cap_chan, 1911721c4181SGustavo F. Padovan retrans_timer.work); 19120a708f8fSGustavo F. Padovan 191349208c9cSGustavo F. Padovan BT_DBG("chan %p", chan); 19140a708f8fSGustavo F. Padovan 19156be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 19166be36555SAndrei Emeltchenko 191780909e04SMat Martineau if (!chan->conn) { 191880909e04SMat Martineau l2cap_chan_unlock(chan); 191980909e04SMat Martineau l2cap_chan_put(chan); 192080909e04SMat Martineau return; 192180909e04SMat Martineau } 19220a708f8fSGustavo F. Padovan 1923401bb1f7SAndrei Emeltchenko l2cap_tx(chan, NULL, NULL, L2CAP_EV_RETRANS_TO); 19246be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 19258d7e1c7fSAndrei Emeltchenko l2cap_chan_put(chan); 19260a708f8fSGustavo F. Padovan } 19270a708f8fSGustavo F. Padovan 1928d660366dSGustavo Padovan static void l2cap_streaming_send(struct l2cap_chan *chan, 19293733937dSMat Martineau struct sk_buff_head *skbs) 19300a708f8fSGustavo F. Padovan { 19310a708f8fSGustavo F. Padovan struct sk_buff *skb; 19323733937dSMat Martineau struct l2cap_ctrl *control; 19330a708f8fSGustavo F. Padovan 19343733937dSMat Martineau BT_DBG("chan %p, skbs %p", chan, skbs); 19353733937dSMat Martineau 1936b99e13adSMat Martineau if (__chan_is_moving(chan)) 1937b99e13adSMat Martineau return; 1938b99e13adSMat Martineau 19393733937dSMat Martineau skb_queue_splice_tail_init(skbs, &chan->tx_q); 19403733937dSMat Martineau 19413733937dSMat Martineau while (!skb_queue_empty(&chan->tx_q)) { 19423733937dSMat Martineau 19433733937dSMat Martineau skb = skb_dequeue(&chan->tx_q); 19443733937dSMat Martineau 19453733937dSMat Martineau bt_cb(skb)->control.retries = 1; 19463733937dSMat Martineau control = &bt_cb(skb)->control; 19473733937dSMat Martineau 19483733937dSMat Martineau control->reqseq = 0; 19493733937dSMat Martineau control->txseq = chan->next_tx_seq; 19503733937dSMat Martineau 19513733937dSMat Martineau __pack_control(chan, control, skb); 19520a708f8fSGustavo F. Padovan 195347d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) { 19543733937dSMat Martineau u16 fcs = crc16(0, (u8 *) skb->data, skb->len); 19553733937dSMat Martineau put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE)); 19560a708f8fSGustavo F. Padovan } 19570a708f8fSGustavo F. Padovan 19584343478fSGustavo F. Padovan l2cap_do_send(chan, skb); 19590a708f8fSGustavo F. Padovan 1960b4400672SAndrei Emeltchenko BT_DBG("Sent txseq %u", control->txseq); 19613733937dSMat Martineau 1962836be934SAndrei Emeltchenko chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq); 19633733937dSMat Martineau chan->frames_sent++; 19640a708f8fSGustavo F. Padovan } 19650a708f8fSGustavo F. Padovan } 19660a708f8fSGustavo F. Padovan 196767c9e840SSzymon Janc static int l2cap_ertm_send(struct l2cap_chan *chan) 19680a708f8fSGustavo F. Padovan { 19690a708f8fSGustavo F. Padovan struct sk_buff *skb, *tx_skb; 197018a48e76SMat Martineau struct l2cap_ctrl *control; 197118a48e76SMat Martineau int sent = 0; 197218a48e76SMat Martineau 197318a48e76SMat Martineau BT_DBG("chan %p", chan); 19740a708f8fSGustavo F. Padovan 197589bc500eSGustavo F. Padovan if (chan->state != BT_CONNECTED) 19760a708f8fSGustavo F. Padovan return -ENOTCONN; 19770a708f8fSGustavo F. Padovan 197894122bbeSMat Martineau if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) 197994122bbeSMat Martineau return 0; 198094122bbeSMat Martineau 1981b99e13adSMat Martineau if (__chan_is_moving(chan)) 1982b99e13adSMat Martineau return 0; 1983b99e13adSMat Martineau 198418a48e76SMat Martineau while (chan->tx_send_head && 198518a48e76SMat Martineau chan->unacked_frames < chan->remote_tx_win && 198618a48e76SMat Martineau chan->tx_state == L2CAP_TX_STATE_XMIT) { 19870a708f8fSGustavo F. Padovan 198818a48e76SMat Martineau skb = chan->tx_send_head; 19890a708f8fSGustavo F. Padovan 199018a48e76SMat Martineau bt_cb(skb)->control.retries = 1; 199118a48e76SMat Martineau control = &bt_cb(skb)->control; 19920a708f8fSGustavo F. Padovan 1993e2ab4353SGustavo F. Padovan if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) 199418a48e76SMat Martineau control->final = 1; 1995e2ab4353SGustavo F. Padovan 199618a48e76SMat Martineau control->reqseq = chan->buffer_seq; 199718a48e76SMat Martineau chan->last_acked_seq = chan->buffer_seq; 199818a48e76SMat Martineau control->txseq = chan->next_tx_seq; 19990a708f8fSGustavo F. Padovan 200018a48e76SMat Martineau __pack_control(chan, control, skb); 20010a708f8fSGustavo F. Padovan 200247d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) { 200318a48e76SMat Martineau u16 fcs = crc16(0, (u8 *) skb->data, skb->len); 200418a48e76SMat Martineau put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE)); 20050a708f8fSGustavo F. Padovan } 20060a708f8fSGustavo F. Padovan 200718a48e76SMat Martineau /* Clone after data has been modified. Data is assumed to be 200818a48e76SMat Martineau read-only (for locking purposes) on cloned sk_buffs. 200918a48e76SMat Martineau */ 201018a48e76SMat Martineau tx_skb = skb_clone(skb, GFP_KERNEL); 201118a48e76SMat Martineau 201218a48e76SMat Martineau if (!tx_skb) 201318a48e76SMat Martineau break; 20140a708f8fSGustavo F. Padovan 20151a09bcb9SGustavo F. Padovan __set_retrans_timer(chan); 20160a708f8fSGustavo F. Padovan 2017836be934SAndrei Emeltchenko chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq); 20186a026610SGustavo F. Padovan chan->unacked_frames++; 20196a026610SGustavo F. Padovan chan->frames_sent++; 202018a48e76SMat Martineau sent++; 20210a708f8fSGustavo F. Padovan 202258d35f87SGustavo F. Padovan if (skb_queue_is_last(&chan->tx_q, skb)) 202358d35f87SGustavo F. Padovan chan->tx_send_head = NULL; 20240a708f8fSGustavo F. Padovan else 202558d35f87SGustavo F. Padovan chan->tx_send_head = skb_queue_next(&chan->tx_q, skb); 202618a48e76SMat Martineau 202718a48e76SMat Martineau l2cap_do_send(chan, tx_skb); 2028b4400672SAndrei Emeltchenko BT_DBG("Sent txseq %u", control->txseq); 20290a708f8fSGustavo F. Padovan } 20300a708f8fSGustavo F. Padovan 2031b4400672SAndrei Emeltchenko BT_DBG("Sent %d, %u unacked, %u in ERTM queue", sent, 2032b4400672SAndrei Emeltchenko chan->unacked_frames, skb_queue_len(&chan->tx_q)); 203318a48e76SMat Martineau 203418a48e76SMat Martineau return sent; 20350a708f8fSGustavo F. Padovan } 20360a708f8fSGustavo F. Padovan 2037e1fbd4c1SMat Martineau static void l2cap_ertm_resend(struct l2cap_chan *chan) 2038e1fbd4c1SMat Martineau { 2039e1fbd4c1SMat Martineau struct l2cap_ctrl control; 2040e1fbd4c1SMat Martineau struct sk_buff *skb; 2041e1fbd4c1SMat Martineau struct sk_buff *tx_skb; 2042e1fbd4c1SMat Martineau u16 seq; 2043e1fbd4c1SMat Martineau 2044e1fbd4c1SMat Martineau BT_DBG("chan %p", chan); 2045e1fbd4c1SMat Martineau 2046e1fbd4c1SMat Martineau if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) 2047e1fbd4c1SMat Martineau return; 2048e1fbd4c1SMat Martineau 2049b99e13adSMat Martineau if (__chan_is_moving(chan)) 2050b99e13adSMat Martineau return; 2051b99e13adSMat Martineau 2052e1fbd4c1SMat Martineau while (chan->retrans_list.head != L2CAP_SEQ_LIST_CLEAR) { 2053e1fbd4c1SMat Martineau seq = l2cap_seq_list_pop(&chan->retrans_list); 2054e1fbd4c1SMat Martineau 2055e1fbd4c1SMat Martineau skb = l2cap_ertm_seq_in_queue(&chan->tx_q, seq); 2056e1fbd4c1SMat Martineau if (!skb) { 2057e1fbd4c1SMat Martineau BT_DBG("Error: Can't retransmit seq %d, frame missing", 2058e1fbd4c1SMat Martineau seq); 2059e1fbd4c1SMat Martineau continue; 2060e1fbd4c1SMat Martineau } 2061e1fbd4c1SMat Martineau 2062e1fbd4c1SMat Martineau bt_cb(skb)->control.retries++; 2063e1fbd4c1SMat Martineau control = bt_cb(skb)->control; 2064e1fbd4c1SMat Martineau 2065e1fbd4c1SMat Martineau if (chan->max_tx != 0 && 2066e1fbd4c1SMat Martineau bt_cb(skb)->control.retries > chan->max_tx) { 2067e1fbd4c1SMat Martineau BT_DBG("Retry limit exceeded (%d)", chan->max_tx); 20685e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 2069e1fbd4c1SMat Martineau l2cap_seq_list_clear(&chan->retrans_list); 2070e1fbd4c1SMat Martineau break; 2071e1fbd4c1SMat Martineau } 2072e1fbd4c1SMat Martineau 2073e1fbd4c1SMat Martineau control.reqseq = chan->buffer_seq; 2074e1fbd4c1SMat Martineau if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) 2075e1fbd4c1SMat Martineau control.final = 1; 2076e1fbd4c1SMat Martineau else 2077e1fbd4c1SMat Martineau control.final = 0; 2078e1fbd4c1SMat Martineau 2079e1fbd4c1SMat Martineau if (skb_cloned(skb)) { 2080e1fbd4c1SMat Martineau /* Cloned sk_buffs are read-only, so we need a 2081e1fbd4c1SMat Martineau * writeable copy 2082e1fbd4c1SMat Martineau */ 20838bcde1f2SGustavo Padovan tx_skb = skb_copy(skb, GFP_KERNEL); 2084e1fbd4c1SMat Martineau } else { 20858bcde1f2SGustavo Padovan tx_skb = skb_clone(skb, GFP_KERNEL); 2086e1fbd4c1SMat Martineau } 2087e1fbd4c1SMat Martineau 2088e1fbd4c1SMat Martineau if (!tx_skb) { 2089e1fbd4c1SMat Martineau l2cap_seq_list_clear(&chan->retrans_list); 2090e1fbd4c1SMat Martineau break; 2091e1fbd4c1SMat Martineau } 2092e1fbd4c1SMat Martineau 2093e1fbd4c1SMat Martineau /* Update skb contents */ 2094e1fbd4c1SMat Martineau if (test_bit(FLAG_EXT_CTRL, &chan->flags)) { 2095e1fbd4c1SMat Martineau put_unaligned_le32(__pack_extended_control(&control), 2096e1fbd4c1SMat Martineau tx_skb->data + L2CAP_HDR_SIZE); 2097e1fbd4c1SMat Martineau } else { 2098e1fbd4c1SMat Martineau put_unaligned_le16(__pack_enhanced_control(&control), 2099e1fbd4c1SMat Martineau tx_skb->data + L2CAP_HDR_SIZE); 2100e1fbd4c1SMat Martineau } 2101e1fbd4c1SMat Martineau 2102e1fbd4c1SMat Martineau if (chan->fcs == L2CAP_FCS_CRC16) { 2103e1fbd4c1SMat Martineau u16 fcs = crc16(0, (u8 *) tx_skb->data, tx_skb->len); 2104e1fbd4c1SMat Martineau put_unaligned_le16(fcs, skb_put(tx_skb, 2105e1fbd4c1SMat Martineau L2CAP_FCS_SIZE)); 2106e1fbd4c1SMat Martineau } 2107e1fbd4c1SMat Martineau 2108e1fbd4c1SMat Martineau l2cap_do_send(chan, tx_skb); 2109e1fbd4c1SMat Martineau 2110e1fbd4c1SMat Martineau BT_DBG("Resent txseq %d", control.txseq); 2111e1fbd4c1SMat Martineau 2112e1fbd4c1SMat Martineau chan->last_acked_seq = chan->buffer_seq; 2113e1fbd4c1SMat Martineau } 2114e1fbd4c1SMat Martineau } 2115e1fbd4c1SMat Martineau 2116f80842a8SMat Martineau static void l2cap_retransmit(struct l2cap_chan *chan, 2117f80842a8SMat Martineau struct l2cap_ctrl *control) 2118f80842a8SMat Martineau { 2119f80842a8SMat Martineau BT_DBG("chan %p, control %p", chan, control); 2120f80842a8SMat Martineau 2121f80842a8SMat Martineau l2cap_seq_list_append(&chan->retrans_list, control->reqseq); 2122f80842a8SMat Martineau l2cap_ertm_resend(chan); 2123f80842a8SMat Martineau } 2124f80842a8SMat Martineau 2125d2a7ac5dSMat Martineau static void l2cap_retransmit_all(struct l2cap_chan *chan, 2126d2a7ac5dSMat Martineau struct l2cap_ctrl *control) 2127d2a7ac5dSMat Martineau { 2128e1fbd4c1SMat Martineau struct sk_buff *skb; 2129e1fbd4c1SMat Martineau 2130e1fbd4c1SMat Martineau BT_DBG("chan %p, control %p", chan, control); 2131e1fbd4c1SMat Martineau 2132e1fbd4c1SMat Martineau if (control->poll) 2133e1fbd4c1SMat Martineau set_bit(CONN_SEND_FBIT, &chan->conn_state); 2134e1fbd4c1SMat Martineau 2135e1fbd4c1SMat Martineau l2cap_seq_list_clear(&chan->retrans_list); 2136e1fbd4c1SMat Martineau 2137e1fbd4c1SMat Martineau if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) 2138e1fbd4c1SMat Martineau return; 2139e1fbd4c1SMat Martineau 2140e1fbd4c1SMat Martineau if (chan->unacked_frames) { 2141e1fbd4c1SMat Martineau skb_queue_walk(&chan->tx_q, skb) { 2142e1fbd4c1SMat Martineau if (bt_cb(skb)->control.txseq == control->reqseq || 2143e1fbd4c1SMat Martineau skb == chan->tx_send_head) 2144e1fbd4c1SMat Martineau break; 2145e1fbd4c1SMat Martineau } 2146e1fbd4c1SMat Martineau 2147e1fbd4c1SMat Martineau skb_queue_walk_from(&chan->tx_q, skb) { 2148e1fbd4c1SMat Martineau if (skb == chan->tx_send_head) 2149e1fbd4c1SMat Martineau break; 2150e1fbd4c1SMat Martineau 2151e1fbd4c1SMat Martineau l2cap_seq_list_append(&chan->retrans_list, 2152e1fbd4c1SMat Martineau bt_cb(skb)->control.txseq); 2153e1fbd4c1SMat Martineau } 2154e1fbd4c1SMat Martineau 2155e1fbd4c1SMat Martineau l2cap_ertm_resend(chan); 2156e1fbd4c1SMat Martineau } 2157d2a7ac5dSMat Martineau } 2158d2a7ac5dSMat Martineau 2159b17e73bbSSzymon Janc static void l2cap_send_ack(struct l2cap_chan *chan) 2160b17e73bbSSzymon Janc { 21610a0aba42SMat Martineau struct l2cap_ctrl control; 21620a0aba42SMat Martineau u16 frames_to_ack = __seq_offset(chan, chan->buffer_seq, 21630a0aba42SMat Martineau chan->last_acked_seq); 21640a0aba42SMat Martineau int threshold; 21650a0aba42SMat Martineau 21660a0aba42SMat Martineau BT_DBG("chan %p last_acked_seq %d buffer_seq %d", 21670a0aba42SMat Martineau chan, chan->last_acked_seq, chan->buffer_seq); 21680a0aba42SMat Martineau 21690a0aba42SMat Martineau memset(&control, 0, sizeof(control)); 21700a0aba42SMat Martineau control.sframe = 1; 21710a0aba42SMat Martineau 21720a0aba42SMat Martineau if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state) && 21730a0aba42SMat Martineau chan->rx_state == L2CAP_RX_STATE_RECV) { 2174b17e73bbSSzymon Janc __clear_ack_timer(chan); 21750a0aba42SMat Martineau control.super = L2CAP_SUPER_RNR; 21760a0aba42SMat Martineau control.reqseq = chan->buffer_seq; 21770a0aba42SMat Martineau l2cap_send_sframe(chan, &control); 21780a0aba42SMat Martineau } else { 21790a0aba42SMat Martineau if (!test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) { 21800a0aba42SMat Martineau l2cap_ertm_send(chan); 21810a0aba42SMat Martineau /* If any i-frames were sent, they included an ack */ 21820a0aba42SMat Martineau if (chan->buffer_seq == chan->last_acked_seq) 21830a0aba42SMat Martineau frames_to_ack = 0; 21840a0aba42SMat Martineau } 21850a0aba42SMat Martineau 2186c20f8e35SMat Martineau /* Ack now if the window is 3/4ths full. 21870a0aba42SMat Martineau * Calculate without mul or div 21880a0aba42SMat Martineau */ 2189c20f8e35SMat Martineau threshold = chan->ack_win; 21900a0aba42SMat Martineau threshold += threshold << 1; 21910a0aba42SMat Martineau threshold >>= 2; 21920a0aba42SMat Martineau 2193b4400672SAndrei Emeltchenko BT_DBG("frames_to_ack %u, threshold %d", frames_to_ack, 21940a0aba42SMat Martineau threshold); 21950a0aba42SMat Martineau 21960a0aba42SMat Martineau if (frames_to_ack >= threshold) { 21970a0aba42SMat Martineau __clear_ack_timer(chan); 21980a0aba42SMat Martineau control.super = L2CAP_SUPER_RR; 21990a0aba42SMat Martineau control.reqseq = chan->buffer_seq; 22000a0aba42SMat Martineau l2cap_send_sframe(chan, &control); 22010a0aba42SMat Martineau frames_to_ack = 0; 22020a0aba42SMat Martineau } 22030a0aba42SMat Martineau 22040a0aba42SMat Martineau if (frames_to_ack) 22050a0aba42SMat Martineau __set_ack_timer(chan); 22060a0aba42SMat Martineau } 2207b17e73bbSSzymon Janc } 2208b17e73bbSSzymon Janc 220904124681SGustavo F. Padovan static inline int l2cap_skbuff_fromiovec(struct l2cap_chan *chan, 221004124681SGustavo F. Padovan struct msghdr *msg, int len, 221104124681SGustavo F. Padovan int count, struct sk_buff *skb) 22120a708f8fSGustavo F. Padovan { 22130952a57aSAndrei Emeltchenko struct l2cap_conn *conn = chan->conn; 22140a708f8fSGustavo F. Padovan struct sk_buff **frag; 221590338947SGustavo Padovan int sent = 0; 22160a708f8fSGustavo F. Padovan 22170a708f8fSGustavo F. Padovan if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) 22180a708f8fSGustavo F. Padovan return -EFAULT; 22190a708f8fSGustavo F. Padovan 22200a708f8fSGustavo F. Padovan sent += count; 22210a708f8fSGustavo F. Padovan len -= count; 22220a708f8fSGustavo F. Padovan 22230a708f8fSGustavo F. Padovan /* Continuation fragments (no L2CAP header) */ 22240a708f8fSGustavo F. Padovan frag = &skb_shinfo(skb)->frag_list; 22250a708f8fSGustavo F. Padovan while (len) { 2226fbe00700SGustavo Padovan struct sk_buff *tmp; 2227fbe00700SGustavo Padovan 22280a708f8fSGustavo F. Padovan count = min_t(unsigned int, conn->mtu, len); 22290a708f8fSGustavo F. Padovan 2230fbe00700SGustavo Padovan tmp = chan->ops->alloc_skb(chan, count, 223190338947SGustavo Padovan msg->msg_flags & MSG_DONTWAIT); 2232fbe00700SGustavo Padovan if (IS_ERR(tmp)) 2233fbe00700SGustavo Padovan return PTR_ERR(tmp); 22342f7719ceSAndrei Emeltchenko 2235fbe00700SGustavo Padovan *frag = tmp; 2236fbe00700SGustavo Padovan 22370a708f8fSGustavo F. Padovan if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) 22380a708f8fSGustavo F. Padovan return -EFAULT; 22390a708f8fSGustavo F. Padovan 22405e59b791SLuiz Augusto von Dentz (*frag)->priority = skb->priority; 22415e59b791SLuiz Augusto von Dentz 22420a708f8fSGustavo F. Padovan sent += count; 22430a708f8fSGustavo F. Padovan len -= count; 22440a708f8fSGustavo F. Padovan 22452d0ed3d5SGustavo Padovan skb->len += (*frag)->len; 22462d0ed3d5SGustavo Padovan skb->data_len += (*frag)->len; 22472d0ed3d5SGustavo Padovan 22480a708f8fSGustavo F. Padovan frag = &(*frag)->next; 22490a708f8fSGustavo F. Padovan } 22500a708f8fSGustavo F. Padovan 22510a708f8fSGustavo F. Padovan return sent; 22520a708f8fSGustavo F. Padovan } 22530a708f8fSGustavo F. Padovan 22545e59b791SLuiz Augusto von Dentz static struct sk_buff *l2cap_create_connless_pdu(struct l2cap_chan *chan, 22555e59b791SLuiz Augusto von Dentz struct msghdr *msg, size_t len, 22565e59b791SLuiz Augusto von Dentz u32 priority) 22570a708f8fSGustavo F. Padovan { 22588c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 22590a708f8fSGustavo F. Padovan struct sk_buff *skb; 226003a51213SAndrei Emeltchenko int err, count, hlen = L2CAP_HDR_SIZE + L2CAP_PSMLEN_SIZE; 22610a708f8fSGustavo F. Padovan struct l2cap_hdr *lh; 22620a708f8fSGustavo F. Padovan 2263b4400672SAndrei Emeltchenko BT_DBG("chan %p len %zu priority %u", chan, len, priority); 22640a708f8fSGustavo F. Padovan 22650a708f8fSGustavo F. Padovan count = min_t(unsigned int, (conn->mtu - hlen), len); 22662f7719ceSAndrei Emeltchenko 22672f7719ceSAndrei Emeltchenko skb = chan->ops->alloc_skb(chan, count + hlen, 226890338947SGustavo Padovan msg->msg_flags & MSG_DONTWAIT); 226990338947SGustavo Padovan if (IS_ERR(skb)) 227090338947SGustavo Padovan return skb; 22710a708f8fSGustavo F. Padovan 22725e59b791SLuiz Augusto von Dentz skb->priority = priority; 22735e59b791SLuiz Augusto von Dentz 22740a708f8fSGustavo F. Padovan /* Create L2CAP header */ 22750a708f8fSGustavo F. Padovan lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); 2276fe4128e0SGustavo F. Padovan lh->cid = cpu_to_le16(chan->dcid); 2277daf6a78cSAndrei Emeltchenko lh->len = cpu_to_le16(len + L2CAP_PSMLEN_SIZE); 2278daf6a78cSAndrei Emeltchenko put_unaligned(chan->psm, skb_put(skb, L2CAP_PSMLEN_SIZE)); 22790a708f8fSGustavo F. Padovan 22800952a57aSAndrei Emeltchenko err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); 22810a708f8fSGustavo F. Padovan if (unlikely(err < 0)) { 22820a708f8fSGustavo F. Padovan kfree_skb(skb); 22830a708f8fSGustavo F. Padovan return ERR_PTR(err); 22840a708f8fSGustavo F. Padovan } 22850a708f8fSGustavo F. Padovan return skb; 22860a708f8fSGustavo F. Padovan } 22870a708f8fSGustavo F. Padovan 22885e59b791SLuiz Augusto von Dentz static struct sk_buff *l2cap_create_basic_pdu(struct l2cap_chan *chan, 22895e59b791SLuiz Augusto von Dentz struct msghdr *msg, size_t len, 22905e59b791SLuiz Augusto von Dentz u32 priority) 22910a708f8fSGustavo F. Padovan { 22928c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 22930a708f8fSGustavo F. Padovan struct sk_buff *skb; 2294f2ba7faeSGustavo Padovan int err, count; 22950a708f8fSGustavo F. Padovan struct l2cap_hdr *lh; 22960a708f8fSGustavo F. Padovan 2297b4400672SAndrei Emeltchenko BT_DBG("chan %p len %zu", chan, len); 22980a708f8fSGustavo F. Padovan 2299f2ba7faeSGustavo Padovan count = min_t(unsigned int, (conn->mtu - L2CAP_HDR_SIZE), len); 23002f7719ceSAndrei Emeltchenko 2301f2ba7faeSGustavo Padovan skb = chan->ops->alloc_skb(chan, count + L2CAP_HDR_SIZE, 230290338947SGustavo Padovan msg->msg_flags & MSG_DONTWAIT); 230390338947SGustavo Padovan if (IS_ERR(skb)) 230490338947SGustavo Padovan return skb; 23050a708f8fSGustavo F. Padovan 23065e59b791SLuiz Augusto von Dentz skb->priority = priority; 23075e59b791SLuiz Augusto von Dentz 23080a708f8fSGustavo F. Padovan /* Create L2CAP header */ 23090a708f8fSGustavo F. Padovan lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); 2310fe4128e0SGustavo F. Padovan lh->cid = cpu_to_le16(chan->dcid); 23116ff9b5efSGustavo Padovan lh->len = cpu_to_le16(len); 23120a708f8fSGustavo F. Padovan 23130952a57aSAndrei Emeltchenko err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); 23140a708f8fSGustavo F. Padovan if (unlikely(err < 0)) { 23150a708f8fSGustavo F. Padovan kfree_skb(skb); 23160a708f8fSGustavo F. Padovan return ERR_PTR(err); 23170a708f8fSGustavo F. Padovan } 23180a708f8fSGustavo F. Padovan return skb; 23190a708f8fSGustavo F. Padovan } 23200a708f8fSGustavo F. Padovan 2321ab0ff76dSLuiz Augusto von Dentz static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan, 2322ab0ff76dSLuiz Augusto von Dentz struct msghdr *msg, size_t len, 232394122bbeSMat Martineau u16 sdulen) 23240a708f8fSGustavo F. Padovan { 23258c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 23260a708f8fSGustavo F. Padovan struct sk_buff *skb; 2327e4ca6d98SAndrei Emeltchenko int err, count, hlen; 23280a708f8fSGustavo F. Padovan struct l2cap_hdr *lh; 23290a708f8fSGustavo F. Padovan 2330b4400672SAndrei Emeltchenko BT_DBG("chan %p len %zu", chan, len); 23310a708f8fSGustavo F. Padovan 23320a708f8fSGustavo F. Padovan if (!conn) 23330a708f8fSGustavo F. Padovan return ERR_PTR(-ENOTCONN); 23340a708f8fSGustavo F. Padovan 2335ba7aa64fSGustavo Padovan hlen = __ertm_hdr_size(chan); 2336e4ca6d98SAndrei Emeltchenko 23370a708f8fSGustavo F. Padovan if (sdulen) 233803a51213SAndrei Emeltchenko hlen += L2CAP_SDULEN_SIZE; 23390a708f8fSGustavo F. Padovan 234047d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) 234103a51213SAndrei Emeltchenko hlen += L2CAP_FCS_SIZE; 23420a708f8fSGustavo F. Padovan 23430a708f8fSGustavo F. Padovan count = min_t(unsigned int, (conn->mtu - hlen), len); 23442f7719ceSAndrei Emeltchenko 23452f7719ceSAndrei Emeltchenko skb = chan->ops->alloc_skb(chan, count + hlen, 234690338947SGustavo Padovan msg->msg_flags & MSG_DONTWAIT); 234790338947SGustavo Padovan if (IS_ERR(skb)) 234890338947SGustavo Padovan return skb; 23490a708f8fSGustavo F. Padovan 23500a708f8fSGustavo F. Padovan /* Create L2CAP header */ 23510a708f8fSGustavo F. Padovan lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); 2352fe4128e0SGustavo F. Padovan lh->cid = cpu_to_le16(chan->dcid); 23530a708f8fSGustavo F. Padovan lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); 235488843ab0SAndrei Emeltchenko 235518a48e76SMat Martineau /* Control header is populated later */ 235618a48e76SMat Martineau if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 235718a48e76SMat Martineau put_unaligned_le32(0, skb_put(skb, L2CAP_EXT_CTRL_SIZE)); 235818a48e76SMat Martineau else 235918a48e76SMat Martineau put_unaligned_le16(0, skb_put(skb, L2CAP_ENH_CTRL_SIZE)); 236088843ab0SAndrei Emeltchenko 23610a708f8fSGustavo F. Padovan if (sdulen) 236203a51213SAndrei Emeltchenko put_unaligned_le16(sdulen, skb_put(skb, L2CAP_SDULEN_SIZE)); 23630a708f8fSGustavo F. Padovan 23640952a57aSAndrei Emeltchenko err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); 23650a708f8fSGustavo F. Padovan if (unlikely(err < 0)) { 23660a708f8fSGustavo F. Padovan kfree_skb(skb); 23670a708f8fSGustavo F. Padovan return ERR_PTR(err); 23680a708f8fSGustavo F. Padovan } 23690a708f8fSGustavo F. Padovan 237018a48e76SMat Martineau bt_cb(skb)->control.fcs = chan->fcs; 23713ce3514fSMat Martineau bt_cb(skb)->control.retries = 0; 23720a708f8fSGustavo F. Padovan return skb; 23730a708f8fSGustavo F. Padovan } 23740a708f8fSGustavo F. Padovan 237594122bbeSMat Martineau static int l2cap_segment_sdu(struct l2cap_chan *chan, 237694122bbeSMat Martineau struct sk_buff_head *seg_queue, 237794122bbeSMat Martineau struct msghdr *msg, size_t len) 23780a708f8fSGustavo F. Padovan { 23790a708f8fSGustavo F. Padovan struct sk_buff *skb; 238094122bbeSMat Martineau u16 sdu_len; 238194122bbeSMat Martineau size_t pdu_len; 238294122bbeSMat Martineau u8 sar; 23830a708f8fSGustavo F. Padovan 2384b4400672SAndrei Emeltchenko BT_DBG("chan %p, msg %p, len %zu", chan, msg, len); 23850a708f8fSGustavo F. Padovan 238694122bbeSMat Martineau /* It is critical that ERTM PDUs fit in a single HCI fragment, 238794122bbeSMat Martineau * so fragmented skbs are not used. The HCI layer's handling 238894122bbeSMat Martineau * of fragmented skbs is not compatible with ERTM's queueing. 238994122bbeSMat Martineau */ 239094122bbeSMat Martineau 239194122bbeSMat Martineau /* PDU size is derived from the HCI MTU */ 239294122bbeSMat Martineau pdu_len = chan->conn->mtu; 239394122bbeSMat Martineau 2394a549574dSMat Martineau /* Constrain PDU size for BR/EDR connections */ 2395a549574dSMat Martineau if (!chan->hs_hcon) 239694122bbeSMat Martineau pdu_len = min_t(size_t, pdu_len, L2CAP_BREDR_MAX_PAYLOAD); 239794122bbeSMat Martineau 239894122bbeSMat Martineau /* Adjust for largest possible L2CAP overhead. */ 239935d401dfSGustavo Padovan if (chan->fcs) 240035d401dfSGustavo Padovan pdu_len -= L2CAP_FCS_SIZE; 240135d401dfSGustavo Padovan 2402ba7aa64fSGustavo Padovan pdu_len -= __ertm_hdr_size(chan); 240394122bbeSMat Martineau 240494122bbeSMat Martineau /* Remote device may have requested smaller PDUs */ 240594122bbeSMat Martineau pdu_len = min_t(size_t, pdu_len, chan->remote_mps); 240694122bbeSMat Martineau 240794122bbeSMat Martineau if (len <= pdu_len) { 240894122bbeSMat Martineau sar = L2CAP_SAR_UNSEGMENTED; 240994122bbeSMat Martineau sdu_len = 0; 241094122bbeSMat Martineau pdu_len = len; 241194122bbeSMat Martineau } else { 241294122bbeSMat Martineau sar = L2CAP_SAR_START; 241394122bbeSMat Martineau sdu_len = len; 241494122bbeSMat Martineau pdu_len -= L2CAP_SDULEN_SIZE; 241594122bbeSMat Martineau } 24160a708f8fSGustavo F. Padovan 24170a708f8fSGustavo F. Padovan while (len > 0) { 241894122bbeSMat Martineau skb = l2cap_create_iframe_pdu(chan, msg, pdu_len, sdu_len); 24190a708f8fSGustavo F. Padovan 24200a708f8fSGustavo F. Padovan if (IS_ERR(skb)) { 242194122bbeSMat Martineau __skb_queue_purge(seg_queue); 24220a708f8fSGustavo F. Padovan return PTR_ERR(skb); 24230a708f8fSGustavo F. Padovan } 24240a708f8fSGustavo F. Padovan 242594122bbeSMat Martineau bt_cb(skb)->control.sar = sar; 242694122bbeSMat Martineau __skb_queue_tail(seg_queue, skb); 24270a708f8fSGustavo F. Padovan 242894122bbeSMat Martineau len -= pdu_len; 242994122bbeSMat Martineau if (sdu_len) { 243094122bbeSMat Martineau sdu_len = 0; 243194122bbeSMat Martineau pdu_len += L2CAP_SDULEN_SIZE; 243294122bbeSMat Martineau } 243394122bbeSMat Martineau 243494122bbeSMat Martineau if (len <= pdu_len) { 243594122bbeSMat Martineau sar = L2CAP_SAR_END; 243694122bbeSMat Martineau pdu_len = len; 243794122bbeSMat Martineau } else { 243894122bbeSMat Martineau sar = L2CAP_SAR_CONTINUE; 243994122bbeSMat Martineau } 244094122bbeSMat Martineau } 244194122bbeSMat Martineau 2442f0f62799SGustavo Padovan return 0; 24430a708f8fSGustavo F. Padovan } 24440a708f8fSGustavo F. Padovan 24455e59b791SLuiz Augusto von Dentz int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 24465e59b791SLuiz Augusto von Dentz u32 priority) 24479a91a04aSGustavo F. Padovan { 24489a91a04aSGustavo F. Padovan struct sk_buff *skb; 24499a91a04aSGustavo F. Padovan int err; 245094122bbeSMat Martineau struct sk_buff_head seg_queue; 24519a91a04aSGustavo F. Padovan 24529a91a04aSGustavo F. Padovan /* Connectionless channel */ 2453715ec005SGustavo F. Padovan if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { 24545e59b791SLuiz Augusto von Dentz skb = l2cap_create_connless_pdu(chan, msg, len, priority); 24559a91a04aSGustavo F. Padovan if (IS_ERR(skb)) 24569a91a04aSGustavo F. Padovan return PTR_ERR(skb); 24579a91a04aSGustavo F. Padovan 24589a91a04aSGustavo F. Padovan l2cap_do_send(chan, skb); 24599a91a04aSGustavo F. Padovan return len; 24609a91a04aSGustavo F. Padovan } 24619a91a04aSGustavo F. Padovan 24629a91a04aSGustavo F. Padovan switch (chan->mode) { 24639a91a04aSGustavo F. Padovan case L2CAP_MODE_BASIC: 24649a91a04aSGustavo F. Padovan /* Check outgoing MTU */ 24659a91a04aSGustavo F. Padovan if (len > chan->omtu) 24669a91a04aSGustavo F. Padovan return -EMSGSIZE; 24679a91a04aSGustavo F. Padovan 24689a91a04aSGustavo F. Padovan /* Create a basic PDU */ 24695e59b791SLuiz Augusto von Dentz skb = l2cap_create_basic_pdu(chan, msg, len, priority); 24709a91a04aSGustavo F. Padovan if (IS_ERR(skb)) 24719a91a04aSGustavo F. Padovan return PTR_ERR(skb); 24729a91a04aSGustavo F. Padovan 24739a91a04aSGustavo F. Padovan l2cap_do_send(chan, skb); 24749a91a04aSGustavo F. Padovan err = len; 24759a91a04aSGustavo F. Padovan break; 24769a91a04aSGustavo F. Padovan 24779a91a04aSGustavo F. Padovan case L2CAP_MODE_ERTM: 24789a91a04aSGustavo F. Padovan case L2CAP_MODE_STREAMING: 247994122bbeSMat Martineau /* Check outgoing MTU */ 248094122bbeSMat Martineau if (len > chan->omtu) { 248194122bbeSMat Martineau err = -EMSGSIZE; 24829a91a04aSGustavo F. Padovan break; 24839a91a04aSGustavo F. Padovan } 24849a91a04aSGustavo F. Padovan 248594122bbeSMat Martineau __skb_queue_head_init(&seg_queue); 248694122bbeSMat Martineau 248794122bbeSMat Martineau /* Do segmentation before calling in to the state machine, 248894122bbeSMat Martineau * since it's possible to block while waiting for memory 248994122bbeSMat Martineau * allocation. 249094122bbeSMat Martineau */ 249194122bbeSMat Martineau err = l2cap_segment_sdu(chan, &seg_queue, msg, len); 249294122bbeSMat Martineau 249394122bbeSMat Martineau /* The channel could have been closed while segmenting, 249494122bbeSMat Martineau * check that it is still connected. 249594122bbeSMat Martineau */ 249694122bbeSMat Martineau if (chan->state != BT_CONNECTED) { 249794122bbeSMat Martineau __skb_queue_purge(&seg_queue); 249894122bbeSMat Martineau err = -ENOTCONN; 24999a91a04aSGustavo F. Padovan } 25009a91a04aSGustavo F. Padovan 250194122bbeSMat Martineau if (err) 250294122bbeSMat Martineau break; 250394122bbeSMat Martineau 25043733937dSMat Martineau if (chan->mode == L2CAP_MODE_ERTM) 2505d660366dSGustavo Padovan l2cap_tx(chan, NULL, &seg_queue, L2CAP_EV_DATA_REQUEST); 25063733937dSMat Martineau else 2507d660366dSGustavo Padovan l2cap_streaming_send(chan, &seg_queue); 250894122bbeSMat Martineau 25099a91a04aSGustavo F. Padovan err = len; 25109a91a04aSGustavo F. Padovan 251194122bbeSMat Martineau /* If the skbs were not queued for sending, they'll still be in 251294122bbeSMat Martineau * seg_queue and need to be purged. 251394122bbeSMat Martineau */ 251494122bbeSMat Martineau __skb_queue_purge(&seg_queue); 25159a91a04aSGustavo F. Padovan break; 25169a91a04aSGustavo F. Padovan 25179a91a04aSGustavo F. Padovan default: 25189a91a04aSGustavo F. Padovan BT_DBG("bad state %1.1x", chan->mode); 25199a91a04aSGustavo F. Padovan err = -EBADFD; 25209a91a04aSGustavo F. Padovan } 25219a91a04aSGustavo F. Padovan 25229a91a04aSGustavo F. Padovan return err; 25239a91a04aSGustavo F. Padovan } 25249a91a04aSGustavo F. Padovan 2525d2a7ac5dSMat Martineau static void l2cap_send_srej(struct l2cap_chan *chan, u16 txseq) 2526d2a7ac5dSMat Martineau { 2527bed68bdeSMat Martineau struct l2cap_ctrl control; 2528bed68bdeSMat Martineau u16 seq; 2529bed68bdeSMat Martineau 2530b4400672SAndrei Emeltchenko BT_DBG("chan %p, txseq %u", chan, txseq); 2531bed68bdeSMat Martineau 2532bed68bdeSMat Martineau memset(&control, 0, sizeof(control)); 2533bed68bdeSMat Martineau control.sframe = 1; 2534bed68bdeSMat Martineau control.super = L2CAP_SUPER_SREJ; 2535bed68bdeSMat Martineau 2536bed68bdeSMat Martineau for (seq = chan->expected_tx_seq; seq != txseq; 2537bed68bdeSMat Martineau seq = __next_seq(chan, seq)) { 2538bed68bdeSMat Martineau if (!l2cap_ertm_seq_in_queue(&chan->srej_q, seq)) { 2539bed68bdeSMat Martineau control.reqseq = seq; 2540bed68bdeSMat Martineau l2cap_send_sframe(chan, &control); 2541bed68bdeSMat Martineau l2cap_seq_list_append(&chan->srej_list, seq); 2542bed68bdeSMat Martineau } 2543bed68bdeSMat Martineau } 2544bed68bdeSMat Martineau 2545bed68bdeSMat Martineau chan->expected_tx_seq = __next_seq(chan, txseq); 2546d2a7ac5dSMat Martineau } 2547d2a7ac5dSMat Martineau 2548d2a7ac5dSMat Martineau static void l2cap_send_srej_tail(struct l2cap_chan *chan) 2549d2a7ac5dSMat Martineau { 2550bed68bdeSMat Martineau struct l2cap_ctrl control; 2551bed68bdeSMat Martineau 2552bed68bdeSMat Martineau BT_DBG("chan %p", chan); 2553bed68bdeSMat Martineau 2554bed68bdeSMat Martineau if (chan->srej_list.tail == L2CAP_SEQ_LIST_CLEAR) 2555bed68bdeSMat Martineau return; 2556bed68bdeSMat Martineau 2557bed68bdeSMat Martineau memset(&control, 0, sizeof(control)); 2558bed68bdeSMat Martineau control.sframe = 1; 2559bed68bdeSMat Martineau control.super = L2CAP_SUPER_SREJ; 2560bed68bdeSMat Martineau control.reqseq = chan->srej_list.tail; 2561bed68bdeSMat Martineau l2cap_send_sframe(chan, &control); 2562d2a7ac5dSMat Martineau } 2563d2a7ac5dSMat Martineau 2564d2a7ac5dSMat Martineau static void l2cap_send_srej_list(struct l2cap_chan *chan, u16 txseq) 2565d2a7ac5dSMat Martineau { 2566bed68bdeSMat Martineau struct l2cap_ctrl control; 2567bed68bdeSMat Martineau u16 initial_head; 2568bed68bdeSMat Martineau u16 seq; 2569bed68bdeSMat Martineau 2570b4400672SAndrei Emeltchenko BT_DBG("chan %p, txseq %u", chan, txseq); 2571bed68bdeSMat Martineau 2572bed68bdeSMat Martineau memset(&control, 0, sizeof(control)); 2573bed68bdeSMat Martineau control.sframe = 1; 2574bed68bdeSMat Martineau control.super = L2CAP_SUPER_SREJ; 2575bed68bdeSMat Martineau 2576bed68bdeSMat Martineau /* Capture initial list head to allow only one pass through the list. */ 2577bed68bdeSMat Martineau initial_head = chan->srej_list.head; 2578bed68bdeSMat Martineau 2579bed68bdeSMat Martineau do { 2580bed68bdeSMat Martineau seq = l2cap_seq_list_pop(&chan->srej_list); 2581bed68bdeSMat Martineau if (seq == txseq || seq == L2CAP_SEQ_LIST_CLEAR) 2582bed68bdeSMat Martineau break; 2583bed68bdeSMat Martineau 2584bed68bdeSMat Martineau control.reqseq = seq; 2585bed68bdeSMat Martineau l2cap_send_sframe(chan, &control); 2586bed68bdeSMat Martineau l2cap_seq_list_append(&chan->srej_list, seq); 2587bed68bdeSMat Martineau } while (chan->srej_list.head != initial_head); 2588d2a7ac5dSMat Martineau } 2589d2a7ac5dSMat Martineau 2590608bcc6dSMat Martineau static void l2cap_process_reqseq(struct l2cap_chan *chan, u16 reqseq) 2591608bcc6dSMat Martineau { 2592608bcc6dSMat Martineau struct sk_buff *acked_skb; 2593608bcc6dSMat Martineau u16 ackseq; 2594608bcc6dSMat Martineau 2595b4400672SAndrei Emeltchenko BT_DBG("chan %p, reqseq %u", chan, reqseq); 2596608bcc6dSMat Martineau 2597608bcc6dSMat Martineau if (chan->unacked_frames == 0 || reqseq == chan->expected_ack_seq) 2598608bcc6dSMat Martineau return; 2599608bcc6dSMat Martineau 2600b4400672SAndrei Emeltchenko BT_DBG("expected_ack_seq %u, unacked_frames %u", 2601608bcc6dSMat Martineau chan->expected_ack_seq, chan->unacked_frames); 2602608bcc6dSMat Martineau 2603608bcc6dSMat Martineau for (ackseq = chan->expected_ack_seq; ackseq != reqseq; 2604608bcc6dSMat Martineau ackseq = __next_seq(chan, ackseq)) { 2605608bcc6dSMat Martineau 2606608bcc6dSMat Martineau acked_skb = l2cap_ertm_seq_in_queue(&chan->tx_q, ackseq); 2607608bcc6dSMat Martineau if (acked_skb) { 2608608bcc6dSMat Martineau skb_unlink(acked_skb, &chan->tx_q); 2609608bcc6dSMat Martineau kfree_skb(acked_skb); 2610608bcc6dSMat Martineau chan->unacked_frames--; 2611608bcc6dSMat Martineau } 2612608bcc6dSMat Martineau } 2613608bcc6dSMat Martineau 2614608bcc6dSMat Martineau chan->expected_ack_seq = reqseq; 2615608bcc6dSMat Martineau 2616608bcc6dSMat Martineau if (chan->unacked_frames == 0) 2617608bcc6dSMat Martineau __clear_retrans_timer(chan); 2618608bcc6dSMat Martineau 2619b4400672SAndrei Emeltchenko BT_DBG("unacked_frames %u", chan->unacked_frames); 2620608bcc6dSMat Martineau } 2621608bcc6dSMat Martineau 2622608bcc6dSMat Martineau static void l2cap_abort_rx_srej_sent(struct l2cap_chan *chan) 2623608bcc6dSMat Martineau { 2624608bcc6dSMat Martineau BT_DBG("chan %p", chan); 2625608bcc6dSMat Martineau 2626608bcc6dSMat Martineau chan->expected_tx_seq = chan->buffer_seq; 2627608bcc6dSMat Martineau l2cap_seq_list_clear(&chan->srej_list); 2628608bcc6dSMat Martineau skb_queue_purge(&chan->srej_q); 2629608bcc6dSMat Martineau chan->rx_state = L2CAP_RX_STATE_RECV; 2630608bcc6dSMat Martineau } 2631608bcc6dSMat Martineau 2632d660366dSGustavo Padovan static void l2cap_tx_state_xmit(struct l2cap_chan *chan, 2633608bcc6dSMat Martineau struct l2cap_ctrl *control, 2634608bcc6dSMat Martineau struct sk_buff_head *skbs, u8 event) 2635608bcc6dSMat Martineau { 2636608bcc6dSMat Martineau BT_DBG("chan %p, control %p, skbs %p, event %d", chan, control, skbs, 2637608bcc6dSMat Martineau event); 2638608bcc6dSMat Martineau 2639608bcc6dSMat Martineau switch (event) { 2640608bcc6dSMat Martineau case L2CAP_EV_DATA_REQUEST: 2641608bcc6dSMat Martineau if (chan->tx_send_head == NULL) 2642608bcc6dSMat Martineau chan->tx_send_head = skb_peek(skbs); 2643608bcc6dSMat Martineau 2644608bcc6dSMat Martineau skb_queue_splice_tail_init(skbs, &chan->tx_q); 2645608bcc6dSMat Martineau l2cap_ertm_send(chan); 2646608bcc6dSMat Martineau break; 2647608bcc6dSMat Martineau case L2CAP_EV_LOCAL_BUSY_DETECTED: 2648608bcc6dSMat Martineau BT_DBG("Enter LOCAL_BUSY"); 2649608bcc6dSMat Martineau set_bit(CONN_LOCAL_BUSY, &chan->conn_state); 2650608bcc6dSMat Martineau 2651608bcc6dSMat Martineau if (chan->rx_state == L2CAP_RX_STATE_SREJ_SENT) { 2652608bcc6dSMat Martineau /* The SREJ_SENT state must be aborted if we are to 2653608bcc6dSMat Martineau * enter the LOCAL_BUSY state. 2654608bcc6dSMat Martineau */ 2655608bcc6dSMat Martineau l2cap_abort_rx_srej_sent(chan); 2656608bcc6dSMat Martineau } 2657608bcc6dSMat Martineau 2658608bcc6dSMat Martineau l2cap_send_ack(chan); 2659608bcc6dSMat Martineau 2660608bcc6dSMat Martineau break; 2661608bcc6dSMat Martineau case L2CAP_EV_LOCAL_BUSY_CLEAR: 2662608bcc6dSMat Martineau BT_DBG("Exit LOCAL_BUSY"); 2663608bcc6dSMat Martineau clear_bit(CONN_LOCAL_BUSY, &chan->conn_state); 2664608bcc6dSMat Martineau 2665608bcc6dSMat Martineau if (test_bit(CONN_RNR_SENT, &chan->conn_state)) { 2666608bcc6dSMat Martineau struct l2cap_ctrl local_control; 2667608bcc6dSMat Martineau 2668608bcc6dSMat Martineau memset(&local_control, 0, sizeof(local_control)); 2669608bcc6dSMat Martineau local_control.sframe = 1; 2670608bcc6dSMat Martineau local_control.super = L2CAP_SUPER_RR; 2671608bcc6dSMat Martineau local_control.poll = 1; 2672608bcc6dSMat Martineau local_control.reqseq = chan->buffer_seq; 2673a67d7f6fSMat Martineau l2cap_send_sframe(chan, &local_control); 2674608bcc6dSMat Martineau 2675608bcc6dSMat Martineau chan->retry_count = 1; 2676608bcc6dSMat Martineau __set_monitor_timer(chan); 2677608bcc6dSMat Martineau chan->tx_state = L2CAP_TX_STATE_WAIT_F; 2678608bcc6dSMat Martineau } 2679608bcc6dSMat Martineau break; 2680608bcc6dSMat Martineau case L2CAP_EV_RECV_REQSEQ_AND_FBIT: 2681608bcc6dSMat Martineau l2cap_process_reqseq(chan, control->reqseq); 2682608bcc6dSMat Martineau break; 2683608bcc6dSMat Martineau case L2CAP_EV_EXPLICIT_POLL: 2684608bcc6dSMat Martineau l2cap_send_rr_or_rnr(chan, 1); 2685608bcc6dSMat Martineau chan->retry_count = 1; 2686608bcc6dSMat Martineau __set_monitor_timer(chan); 2687608bcc6dSMat Martineau __clear_ack_timer(chan); 2688608bcc6dSMat Martineau chan->tx_state = L2CAP_TX_STATE_WAIT_F; 2689608bcc6dSMat Martineau break; 2690608bcc6dSMat Martineau case L2CAP_EV_RETRANS_TO: 2691608bcc6dSMat Martineau l2cap_send_rr_or_rnr(chan, 1); 2692608bcc6dSMat Martineau chan->retry_count = 1; 2693608bcc6dSMat Martineau __set_monitor_timer(chan); 2694608bcc6dSMat Martineau chan->tx_state = L2CAP_TX_STATE_WAIT_F; 2695608bcc6dSMat Martineau break; 2696608bcc6dSMat Martineau case L2CAP_EV_RECV_FBIT: 2697608bcc6dSMat Martineau /* Nothing to process */ 2698608bcc6dSMat Martineau break; 2699608bcc6dSMat Martineau default: 2700608bcc6dSMat Martineau break; 2701608bcc6dSMat Martineau } 2702608bcc6dSMat Martineau } 2703608bcc6dSMat Martineau 2704d660366dSGustavo Padovan static void l2cap_tx_state_wait_f(struct l2cap_chan *chan, 2705608bcc6dSMat Martineau struct l2cap_ctrl *control, 2706608bcc6dSMat Martineau struct sk_buff_head *skbs, u8 event) 2707608bcc6dSMat Martineau { 2708608bcc6dSMat Martineau BT_DBG("chan %p, control %p, skbs %p, event %d", chan, control, skbs, 2709608bcc6dSMat Martineau event); 2710608bcc6dSMat Martineau 2711608bcc6dSMat Martineau switch (event) { 2712608bcc6dSMat Martineau case L2CAP_EV_DATA_REQUEST: 2713608bcc6dSMat Martineau if (chan->tx_send_head == NULL) 2714608bcc6dSMat Martineau chan->tx_send_head = skb_peek(skbs); 2715608bcc6dSMat Martineau /* Queue data, but don't send. */ 2716608bcc6dSMat Martineau skb_queue_splice_tail_init(skbs, &chan->tx_q); 2717608bcc6dSMat Martineau break; 2718608bcc6dSMat Martineau case L2CAP_EV_LOCAL_BUSY_DETECTED: 2719608bcc6dSMat Martineau BT_DBG("Enter LOCAL_BUSY"); 2720608bcc6dSMat Martineau set_bit(CONN_LOCAL_BUSY, &chan->conn_state); 2721608bcc6dSMat Martineau 2722608bcc6dSMat Martineau if (chan->rx_state == L2CAP_RX_STATE_SREJ_SENT) { 2723608bcc6dSMat Martineau /* The SREJ_SENT state must be aborted if we are to 2724608bcc6dSMat Martineau * enter the LOCAL_BUSY state. 2725608bcc6dSMat Martineau */ 2726608bcc6dSMat Martineau l2cap_abort_rx_srej_sent(chan); 2727608bcc6dSMat Martineau } 2728608bcc6dSMat Martineau 2729608bcc6dSMat Martineau l2cap_send_ack(chan); 2730608bcc6dSMat Martineau 2731608bcc6dSMat Martineau break; 2732608bcc6dSMat Martineau case L2CAP_EV_LOCAL_BUSY_CLEAR: 2733608bcc6dSMat Martineau BT_DBG("Exit LOCAL_BUSY"); 2734608bcc6dSMat Martineau clear_bit(CONN_LOCAL_BUSY, &chan->conn_state); 2735608bcc6dSMat Martineau 2736608bcc6dSMat Martineau if (test_bit(CONN_RNR_SENT, &chan->conn_state)) { 2737608bcc6dSMat Martineau struct l2cap_ctrl local_control; 2738608bcc6dSMat Martineau memset(&local_control, 0, sizeof(local_control)); 2739608bcc6dSMat Martineau local_control.sframe = 1; 2740608bcc6dSMat Martineau local_control.super = L2CAP_SUPER_RR; 2741608bcc6dSMat Martineau local_control.poll = 1; 2742608bcc6dSMat Martineau local_control.reqseq = chan->buffer_seq; 2743a67d7f6fSMat Martineau l2cap_send_sframe(chan, &local_control); 2744608bcc6dSMat Martineau 2745608bcc6dSMat Martineau chan->retry_count = 1; 2746608bcc6dSMat Martineau __set_monitor_timer(chan); 2747608bcc6dSMat Martineau chan->tx_state = L2CAP_TX_STATE_WAIT_F; 2748608bcc6dSMat Martineau } 2749608bcc6dSMat Martineau break; 2750608bcc6dSMat Martineau case L2CAP_EV_RECV_REQSEQ_AND_FBIT: 2751608bcc6dSMat Martineau l2cap_process_reqseq(chan, control->reqseq); 2752608bcc6dSMat Martineau 2753608bcc6dSMat Martineau /* Fall through */ 2754608bcc6dSMat Martineau 2755608bcc6dSMat Martineau case L2CAP_EV_RECV_FBIT: 2756608bcc6dSMat Martineau if (control && control->final) { 2757608bcc6dSMat Martineau __clear_monitor_timer(chan); 2758608bcc6dSMat Martineau if (chan->unacked_frames > 0) 2759608bcc6dSMat Martineau __set_retrans_timer(chan); 2760608bcc6dSMat Martineau chan->retry_count = 0; 2761608bcc6dSMat Martineau chan->tx_state = L2CAP_TX_STATE_XMIT; 2762608bcc6dSMat Martineau BT_DBG("recv fbit tx_state 0x2.2%x", chan->tx_state); 2763608bcc6dSMat Martineau } 2764608bcc6dSMat Martineau break; 2765608bcc6dSMat Martineau case L2CAP_EV_EXPLICIT_POLL: 2766608bcc6dSMat Martineau /* Ignore */ 2767608bcc6dSMat Martineau break; 2768608bcc6dSMat Martineau case L2CAP_EV_MONITOR_TO: 2769608bcc6dSMat Martineau if (chan->max_tx == 0 || chan->retry_count < chan->max_tx) { 2770608bcc6dSMat Martineau l2cap_send_rr_or_rnr(chan, 1); 2771608bcc6dSMat Martineau __set_monitor_timer(chan); 2772608bcc6dSMat Martineau chan->retry_count++; 2773608bcc6dSMat Martineau } else { 27745e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNABORTED); 2775608bcc6dSMat Martineau } 2776608bcc6dSMat Martineau break; 2777608bcc6dSMat Martineau default: 2778608bcc6dSMat Martineau break; 2779608bcc6dSMat Martineau } 2780608bcc6dSMat Martineau } 2781608bcc6dSMat Martineau 2782d660366dSGustavo Padovan static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control, 2783608bcc6dSMat Martineau struct sk_buff_head *skbs, u8 event) 2784608bcc6dSMat Martineau { 2785608bcc6dSMat Martineau BT_DBG("chan %p, control %p, skbs %p, event %d, state %d", 2786608bcc6dSMat Martineau chan, control, skbs, event, chan->tx_state); 2787608bcc6dSMat Martineau 2788608bcc6dSMat Martineau switch (chan->tx_state) { 2789608bcc6dSMat Martineau case L2CAP_TX_STATE_XMIT: 2790d660366dSGustavo Padovan l2cap_tx_state_xmit(chan, control, skbs, event); 2791608bcc6dSMat Martineau break; 2792608bcc6dSMat Martineau case L2CAP_TX_STATE_WAIT_F: 2793d660366dSGustavo Padovan l2cap_tx_state_wait_f(chan, control, skbs, event); 2794608bcc6dSMat Martineau break; 2795608bcc6dSMat Martineau default: 2796608bcc6dSMat Martineau /* Ignore event */ 2797608bcc6dSMat Martineau break; 2798608bcc6dSMat Martineau } 2799608bcc6dSMat Martineau } 2800608bcc6dSMat Martineau 28014b51dae9SMat Martineau static void l2cap_pass_to_tx(struct l2cap_chan *chan, 28024b51dae9SMat Martineau struct l2cap_ctrl *control) 28034b51dae9SMat Martineau { 28044b51dae9SMat Martineau BT_DBG("chan %p, control %p", chan, control); 2805401bb1f7SAndrei Emeltchenko l2cap_tx(chan, control, NULL, L2CAP_EV_RECV_REQSEQ_AND_FBIT); 28064b51dae9SMat Martineau } 28074b51dae9SMat Martineau 2808f80842a8SMat Martineau static void l2cap_pass_to_tx_fbit(struct l2cap_chan *chan, 2809f80842a8SMat Martineau struct l2cap_ctrl *control) 2810f80842a8SMat Martineau { 2811f80842a8SMat Martineau BT_DBG("chan %p, control %p", chan, control); 2812401bb1f7SAndrei Emeltchenko l2cap_tx(chan, control, NULL, L2CAP_EV_RECV_FBIT); 2813f80842a8SMat Martineau } 2814f80842a8SMat Martineau 28150a708f8fSGustavo F. Padovan /* Copy frame to all raw sockets on that connection */ 28160a708f8fSGustavo F. Padovan static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) 28170a708f8fSGustavo F. Padovan { 28180a708f8fSGustavo F. Padovan struct sk_buff *nskb; 281948454079SGustavo F. Padovan struct l2cap_chan *chan; 28200a708f8fSGustavo F. Padovan 28210a708f8fSGustavo F. Padovan BT_DBG("conn %p", conn); 28220a708f8fSGustavo F. Padovan 28233df91ea2SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 28243d57dc68SGustavo F. Padovan 28253df91ea2SAndrei Emeltchenko list_for_each_entry(chan, &conn->chan_l, list) { 282648454079SGustavo F. Padovan struct sock *sk = chan->sk; 2827715ec005SGustavo F. Padovan if (chan->chan_type != L2CAP_CHAN_RAW) 28280a708f8fSGustavo F. Padovan continue; 28290a708f8fSGustavo F. Padovan 28300a708f8fSGustavo F. Padovan /* Don't send frame to the socket it came from */ 28310a708f8fSGustavo F. Padovan if (skb->sk == sk) 28320a708f8fSGustavo F. Padovan continue; 28338bcde1f2SGustavo Padovan nskb = skb_clone(skb, GFP_KERNEL); 28340a708f8fSGustavo F. Padovan if (!nskb) 28350a708f8fSGustavo F. Padovan continue; 28360a708f8fSGustavo F. Padovan 283780b98027SGustavo Padovan if (chan->ops->recv(chan, nskb)) 28380a708f8fSGustavo F. Padovan kfree_skb(nskb); 28390a708f8fSGustavo F. Padovan } 28403d57dc68SGustavo F. Padovan 28413df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 28420a708f8fSGustavo F. Padovan } 28430a708f8fSGustavo F. Padovan 28440a708f8fSGustavo F. Padovan /* ---- L2CAP signalling commands ---- */ 2845b4400672SAndrei Emeltchenko static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, u8 code, 2846b4400672SAndrei Emeltchenko u8 ident, u16 dlen, void *data) 28470a708f8fSGustavo F. Padovan { 28480a708f8fSGustavo F. Padovan struct sk_buff *skb, **frag; 28490a708f8fSGustavo F. Padovan struct l2cap_cmd_hdr *cmd; 28500a708f8fSGustavo F. Padovan struct l2cap_hdr *lh; 28510a708f8fSGustavo F. Padovan int len, count; 28520a708f8fSGustavo F. Padovan 2853b4400672SAndrei Emeltchenko BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %u", 28540a708f8fSGustavo F. Padovan conn, code, ident, dlen); 28550a708f8fSGustavo F. Padovan 2856300b962eSAnderson Lizardo if (conn->mtu < L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE) 2857300b962eSAnderson Lizardo return NULL; 2858300b962eSAnderson Lizardo 28590a708f8fSGustavo F. Padovan len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; 28600a708f8fSGustavo F. Padovan count = min_t(unsigned int, conn->mtu, len); 28610a708f8fSGustavo F. Padovan 28628bcde1f2SGustavo Padovan skb = bt_skb_alloc(count, GFP_KERNEL); 28630a708f8fSGustavo F. Padovan if (!skb) 28640a708f8fSGustavo F. Padovan return NULL; 28650a708f8fSGustavo F. Padovan 28660a708f8fSGustavo F. Padovan lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); 28670a708f8fSGustavo F. Padovan lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); 28683300d9a9SClaudio Takahasi 28693300d9a9SClaudio Takahasi if (conn->hcon->type == LE_LINK) 2870ac73498cSAndrei Emeltchenko lh->cid = __constant_cpu_to_le16(L2CAP_CID_LE_SIGNALING); 28713300d9a9SClaudio Takahasi else 2872ac73498cSAndrei Emeltchenko lh->cid = __constant_cpu_to_le16(L2CAP_CID_SIGNALING); 28730a708f8fSGustavo F. Padovan 28740a708f8fSGustavo F. Padovan cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); 28750a708f8fSGustavo F. Padovan cmd->code = code; 28760a708f8fSGustavo F. Padovan cmd->ident = ident; 28770a708f8fSGustavo F. Padovan cmd->len = cpu_to_le16(dlen); 28780a708f8fSGustavo F. Padovan 28790a708f8fSGustavo F. Padovan if (dlen) { 28800a708f8fSGustavo F. Padovan count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; 28810a708f8fSGustavo F. Padovan memcpy(skb_put(skb, count), data, count); 28820a708f8fSGustavo F. Padovan data += count; 28830a708f8fSGustavo F. Padovan } 28840a708f8fSGustavo F. Padovan 28850a708f8fSGustavo F. Padovan len -= skb->len; 28860a708f8fSGustavo F. Padovan 28870a708f8fSGustavo F. Padovan /* Continuation fragments (no L2CAP header) */ 28880a708f8fSGustavo F. Padovan frag = &skb_shinfo(skb)->frag_list; 28890a708f8fSGustavo F. Padovan while (len) { 28900a708f8fSGustavo F. Padovan count = min_t(unsigned int, conn->mtu, len); 28910a708f8fSGustavo F. Padovan 28928bcde1f2SGustavo Padovan *frag = bt_skb_alloc(count, GFP_KERNEL); 28930a708f8fSGustavo F. Padovan if (!*frag) 28940a708f8fSGustavo F. Padovan goto fail; 28950a708f8fSGustavo F. Padovan 28960a708f8fSGustavo F. Padovan memcpy(skb_put(*frag, count), data, count); 28970a708f8fSGustavo F. Padovan 28980a708f8fSGustavo F. Padovan len -= count; 28990a708f8fSGustavo F. Padovan data += count; 29000a708f8fSGustavo F. Padovan 29010a708f8fSGustavo F. Padovan frag = &(*frag)->next; 29020a708f8fSGustavo F. Padovan } 29030a708f8fSGustavo F. Padovan 29040a708f8fSGustavo F. Padovan return skb; 29050a708f8fSGustavo F. Padovan 29060a708f8fSGustavo F. Padovan fail: 29070a708f8fSGustavo F. Padovan kfree_skb(skb); 29080a708f8fSGustavo F. Padovan return NULL; 29090a708f8fSGustavo F. Padovan } 29100a708f8fSGustavo F. Padovan 29112d792818SGustavo Padovan static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, 29122d792818SGustavo Padovan unsigned long *val) 29130a708f8fSGustavo F. Padovan { 29140a708f8fSGustavo F. Padovan struct l2cap_conf_opt *opt = *ptr; 29150a708f8fSGustavo F. Padovan int len; 29160a708f8fSGustavo F. Padovan 29170a708f8fSGustavo F. Padovan len = L2CAP_CONF_OPT_SIZE + opt->len; 29180a708f8fSGustavo F. Padovan *ptr += len; 29190a708f8fSGustavo F. Padovan 29200a708f8fSGustavo F. Padovan *type = opt->type; 29210a708f8fSGustavo F. Padovan *olen = opt->len; 29220a708f8fSGustavo F. Padovan 29230a708f8fSGustavo F. Padovan switch (opt->len) { 29240a708f8fSGustavo F. Padovan case 1: 29250a708f8fSGustavo F. Padovan *val = *((u8 *) opt->val); 29260a708f8fSGustavo F. Padovan break; 29270a708f8fSGustavo F. Padovan 29280a708f8fSGustavo F. Padovan case 2: 29290a708f8fSGustavo F. Padovan *val = get_unaligned_le16(opt->val); 29300a708f8fSGustavo F. Padovan break; 29310a708f8fSGustavo F. Padovan 29320a708f8fSGustavo F. Padovan case 4: 29330a708f8fSGustavo F. Padovan *val = get_unaligned_le32(opt->val); 29340a708f8fSGustavo F. Padovan break; 29350a708f8fSGustavo F. Padovan 29360a708f8fSGustavo F. Padovan default: 29370a708f8fSGustavo F. Padovan *val = (unsigned long) opt->val; 29380a708f8fSGustavo F. Padovan break; 29390a708f8fSGustavo F. Padovan } 29400a708f8fSGustavo F. Padovan 2941b4400672SAndrei Emeltchenko BT_DBG("type 0x%2.2x len %u val 0x%lx", *type, opt->len, *val); 29420a708f8fSGustavo F. Padovan return len; 29430a708f8fSGustavo F. Padovan } 29440a708f8fSGustavo F. Padovan 29450a708f8fSGustavo F. Padovan static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) 29460a708f8fSGustavo F. Padovan { 29470a708f8fSGustavo F. Padovan struct l2cap_conf_opt *opt = *ptr; 29480a708f8fSGustavo F. Padovan 2949b4400672SAndrei Emeltchenko BT_DBG("type 0x%2.2x len %u val 0x%lx", type, len, val); 29500a708f8fSGustavo F. Padovan 29510a708f8fSGustavo F. Padovan opt->type = type; 29520a708f8fSGustavo F. Padovan opt->len = len; 29530a708f8fSGustavo F. Padovan 29540a708f8fSGustavo F. Padovan switch (len) { 29550a708f8fSGustavo F. Padovan case 1: 29560a708f8fSGustavo F. Padovan *((u8 *) opt->val) = val; 29570a708f8fSGustavo F. Padovan break; 29580a708f8fSGustavo F. Padovan 29590a708f8fSGustavo F. Padovan case 2: 29600a708f8fSGustavo F. Padovan put_unaligned_le16(val, opt->val); 29610a708f8fSGustavo F. Padovan break; 29620a708f8fSGustavo F. Padovan 29630a708f8fSGustavo F. Padovan case 4: 29640a708f8fSGustavo F. Padovan put_unaligned_le32(val, opt->val); 29650a708f8fSGustavo F. Padovan break; 29660a708f8fSGustavo F. Padovan 29670a708f8fSGustavo F. Padovan default: 29680a708f8fSGustavo F. Padovan memcpy(opt->val, (void *) val, len); 29690a708f8fSGustavo F. Padovan break; 29700a708f8fSGustavo F. Padovan } 29710a708f8fSGustavo F. Padovan 29720a708f8fSGustavo F. Padovan *ptr += L2CAP_CONF_OPT_SIZE + len; 29730a708f8fSGustavo F. Padovan } 29740a708f8fSGustavo F. Padovan 2975f89cef09SAndrei Emeltchenko static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan) 2976f89cef09SAndrei Emeltchenko { 2977f89cef09SAndrei Emeltchenko struct l2cap_conf_efs efs; 2978f89cef09SAndrei Emeltchenko 2979f89cef09SAndrei Emeltchenko switch (chan->mode) { 2980f89cef09SAndrei Emeltchenko case L2CAP_MODE_ERTM: 2981f89cef09SAndrei Emeltchenko efs.id = chan->local_id; 2982f89cef09SAndrei Emeltchenko efs.stype = chan->local_stype; 2983f89cef09SAndrei Emeltchenko efs.msdu = cpu_to_le16(chan->local_msdu); 2984f89cef09SAndrei Emeltchenko efs.sdu_itime = cpu_to_le32(chan->local_sdu_itime); 2985ac73498cSAndrei Emeltchenko efs.acc_lat = __constant_cpu_to_le32(L2CAP_DEFAULT_ACC_LAT); 29868936fa6dSAndrei Emeltchenko efs.flush_to = __constant_cpu_to_le32(L2CAP_EFS_DEFAULT_FLUSH_TO); 2987f89cef09SAndrei Emeltchenko break; 2988f89cef09SAndrei Emeltchenko 2989f89cef09SAndrei Emeltchenko case L2CAP_MODE_STREAMING: 2990f89cef09SAndrei Emeltchenko efs.id = 1; 2991f89cef09SAndrei Emeltchenko efs.stype = L2CAP_SERV_BESTEFFORT; 2992f89cef09SAndrei Emeltchenko efs.msdu = cpu_to_le16(chan->local_msdu); 2993f89cef09SAndrei Emeltchenko efs.sdu_itime = cpu_to_le32(chan->local_sdu_itime); 2994f89cef09SAndrei Emeltchenko efs.acc_lat = 0; 2995f89cef09SAndrei Emeltchenko efs.flush_to = 0; 2996f89cef09SAndrei Emeltchenko break; 2997f89cef09SAndrei Emeltchenko 2998f89cef09SAndrei Emeltchenko default: 2999f89cef09SAndrei Emeltchenko return; 3000f89cef09SAndrei Emeltchenko } 3001f89cef09SAndrei Emeltchenko 3002f89cef09SAndrei Emeltchenko l2cap_add_conf_opt(ptr, L2CAP_CONF_EFS, sizeof(efs), 3003f89cef09SAndrei Emeltchenko (unsigned long) &efs); 3004f89cef09SAndrei Emeltchenko } 3005f89cef09SAndrei Emeltchenko 3006721c4181SGustavo F. Padovan static void l2cap_ack_timeout(struct work_struct *work) 30070a708f8fSGustavo F. Padovan { 3008721c4181SGustavo F. Padovan struct l2cap_chan *chan = container_of(work, struct l2cap_chan, 3009721c4181SGustavo F. Padovan ack_timer.work); 30100362520bSMat Martineau u16 frames_to_ack; 30110a708f8fSGustavo F. Padovan 30122fb9b3d4SGustavo F. Padovan BT_DBG("chan %p", chan); 30132fb9b3d4SGustavo F. Padovan 30146be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 30156be36555SAndrei Emeltchenko 30160362520bSMat Martineau frames_to_ack = __seq_offset(chan, chan->buffer_seq, 30170362520bSMat Martineau chan->last_acked_seq); 30180362520bSMat Martineau 30190362520bSMat Martineau if (frames_to_ack) 30200362520bSMat Martineau l2cap_send_rr_or_rnr(chan, 0); 30216be36555SAndrei Emeltchenko 30226be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 302309bfb2eeSSzymon Janc l2cap_chan_put(chan); 30240a708f8fSGustavo F. Padovan } 30250a708f8fSGustavo F. Padovan 3026466f8004SAndrei Emeltchenko int l2cap_ertm_init(struct l2cap_chan *chan) 30270a708f8fSGustavo F. Padovan { 30283c588192SMat Martineau int err; 30293c588192SMat Martineau 3030105bdf9eSMat Martineau chan->next_tx_seq = 0; 3031105bdf9eSMat Martineau chan->expected_tx_seq = 0; 303242e5c802SGustavo F. Padovan chan->expected_ack_seq = 0; 30336a026610SGustavo F. Padovan chan->unacked_frames = 0; 303442e5c802SGustavo F. Padovan chan->buffer_seq = 0; 30356a026610SGustavo F. Padovan chan->frames_sent = 0; 3036105bdf9eSMat Martineau chan->last_acked_seq = 0; 3037105bdf9eSMat Martineau chan->sdu = NULL; 3038105bdf9eSMat Martineau chan->sdu_last_frag = NULL; 3039105bdf9eSMat Martineau chan->sdu_len = 0; 3040105bdf9eSMat Martineau 3041d34c34fbSMat Martineau skb_queue_head_init(&chan->tx_q); 3042d34c34fbSMat Martineau 304308333283SMat Martineau chan->local_amp_id = 0; 304408333283SMat Martineau chan->move_id = 0; 304508333283SMat Martineau chan->move_state = L2CAP_MOVE_STABLE; 304608333283SMat Martineau chan->move_role = L2CAP_MOVE_ROLE_NONE; 304708333283SMat Martineau 3048105bdf9eSMat Martineau if (chan->mode != L2CAP_MODE_ERTM) 3049105bdf9eSMat Martineau return 0; 3050105bdf9eSMat Martineau 3051105bdf9eSMat Martineau chan->rx_state = L2CAP_RX_STATE_RECV; 3052105bdf9eSMat Martineau chan->tx_state = L2CAP_TX_STATE_XMIT; 30530a708f8fSGustavo F. Padovan 3054721c4181SGustavo F. Padovan INIT_DELAYED_WORK(&chan->retrans_timer, l2cap_retrans_timeout); 3055721c4181SGustavo F. Padovan INIT_DELAYED_WORK(&chan->monitor_timer, l2cap_monitor_timeout); 3056721c4181SGustavo F. Padovan INIT_DELAYED_WORK(&chan->ack_timer, l2cap_ack_timeout); 30570a708f8fSGustavo F. Padovan 3058f1c6775bSGustavo F. Padovan skb_queue_head_init(&chan->srej_q); 30590a708f8fSGustavo F. Padovan 30603c588192SMat Martineau err = l2cap_seq_list_init(&chan->srej_list, chan->tx_win); 30613c588192SMat Martineau if (err < 0) 30623c588192SMat Martineau return err; 30633c588192SMat Martineau 30649dc9affcSMat Martineau err = l2cap_seq_list_init(&chan->retrans_list, chan->remote_tx_win); 30659dc9affcSMat Martineau if (err < 0) 30669dc9affcSMat Martineau l2cap_seq_list_free(&chan->srej_list); 30679dc9affcSMat Martineau 30689dc9affcSMat Martineau return err; 30690a708f8fSGustavo F. Padovan } 30700a708f8fSGustavo F. Padovan 30710a708f8fSGustavo F. Padovan static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) 30720a708f8fSGustavo F. Padovan { 30730a708f8fSGustavo F. Padovan switch (mode) { 30740a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 30750a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 30760a708f8fSGustavo F. Padovan if (l2cap_mode_supported(mode, remote_feat_mask)) 30770a708f8fSGustavo F. Padovan return mode; 30780a708f8fSGustavo F. Padovan /* fall through */ 30790a708f8fSGustavo F. Padovan default: 30800a708f8fSGustavo F. Padovan return L2CAP_MODE_BASIC; 30810a708f8fSGustavo F. Padovan } 30820a708f8fSGustavo F. Padovan } 30830a708f8fSGustavo F. Padovan 30846327eb98SAndrei Emeltchenko static inline bool __l2cap_ews_supported(struct l2cap_chan *chan) 30856327eb98SAndrei Emeltchenko { 30866327eb98SAndrei Emeltchenko return enable_hs && chan->conn->feat_mask & L2CAP_FEAT_EXT_WINDOW; 30876327eb98SAndrei Emeltchenko } 30886327eb98SAndrei Emeltchenko 3089f89cef09SAndrei Emeltchenko static inline bool __l2cap_efs_supported(struct l2cap_chan *chan) 3090f89cef09SAndrei Emeltchenko { 3091f89cef09SAndrei Emeltchenko return enable_hs && chan->conn->feat_mask & L2CAP_FEAT_EXT_FLOW; 3092f89cef09SAndrei Emeltchenko } 3093f89cef09SAndrei Emeltchenko 309436c86c85SMat Martineau static void __l2cap_set_ertm_timeouts(struct l2cap_chan *chan, 309536c86c85SMat Martineau struct l2cap_conf_rfc *rfc) 309636c86c85SMat Martineau { 309736c86c85SMat Martineau if (chan->local_amp_id && chan->hs_hcon) { 309836c86c85SMat Martineau u64 ertm_to = chan->hs_hcon->hdev->amp_be_flush_to; 309936c86c85SMat Martineau 310036c86c85SMat Martineau /* Class 1 devices have must have ERTM timeouts 310136c86c85SMat Martineau * exceeding the Link Supervision Timeout. The 310236c86c85SMat Martineau * default Link Supervision Timeout for AMP 310336c86c85SMat Martineau * controllers is 10 seconds. 310436c86c85SMat Martineau * 310536c86c85SMat Martineau * Class 1 devices use 0xffffffff for their 310636c86c85SMat Martineau * best-effort flush timeout, so the clamping logic 310736c86c85SMat Martineau * will result in a timeout that meets the above 310836c86c85SMat Martineau * requirement. ERTM timeouts are 16-bit values, so 310936c86c85SMat Martineau * the maximum timeout is 65.535 seconds. 311036c86c85SMat Martineau */ 311136c86c85SMat Martineau 311236c86c85SMat Martineau /* Convert timeout to milliseconds and round */ 311336c86c85SMat Martineau ertm_to = DIV_ROUND_UP_ULL(ertm_to, 1000); 311436c86c85SMat Martineau 311536c86c85SMat Martineau /* This is the recommended formula for class 2 devices 311636c86c85SMat Martineau * that start ERTM timers when packets are sent to the 311736c86c85SMat Martineau * controller. 311836c86c85SMat Martineau */ 311936c86c85SMat Martineau ertm_to = 3 * ertm_to + 500; 312036c86c85SMat Martineau 312136c86c85SMat Martineau if (ertm_to > 0xffff) 312236c86c85SMat Martineau ertm_to = 0xffff; 312336c86c85SMat Martineau 312436c86c85SMat Martineau rfc->retrans_timeout = cpu_to_le16((u16) ertm_to); 312536c86c85SMat Martineau rfc->monitor_timeout = rfc->retrans_timeout; 312636c86c85SMat Martineau } else { 312736c86c85SMat Martineau rfc->retrans_timeout = __constant_cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO); 312836c86c85SMat Martineau rfc->monitor_timeout = __constant_cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO); 312936c86c85SMat Martineau } 313036c86c85SMat Martineau } 313136c86c85SMat Martineau 31326327eb98SAndrei Emeltchenko static inline void l2cap_txwin_setup(struct l2cap_chan *chan) 31336327eb98SAndrei Emeltchenko { 31346327eb98SAndrei Emeltchenko if (chan->tx_win > L2CAP_DEFAULT_TX_WINDOW && 3135836be934SAndrei Emeltchenko __l2cap_ews_supported(chan)) { 31366327eb98SAndrei Emeltchenko /* use extended control field */ 31376327eb98SAndrei Emeltchenko set_bit(FLAG_EXT_CTRL, &chan->flags); 3138836be934SAndrei Emeltchenko chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW; 3139836be934SAndrei Emeltchenko } else { 31406327eb98SAndrei Emeltchenko chan->tx_win = min_t(u16, chan->tx_win, 31416327eb98SAndrei Emeltchenko L2CAP_DEFAULT_TX_WINDOW); 3142836be934SAndrei Emeltchenko chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW; 3143836be934SAndrei Emeltchenko } 3144c20f8e35SMat Martineau chan->ack_win = chan->tx_win; 31456327eb98SAndrei Emeltchenko } 31466327eb98SAndrei Emeltchenko 3147710f9b0aSGustavo F. Padovan static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data) 31480a708f8fSGustavo F. Padovan { 31490a708f8fSGustavo F. Padovan struct l2cap_conf_req *req = data; 31500c1bc5c6SGustavo F. Padovan struct l2cap_conf_rfc rfc = { .mode = chan->mode }; 31510a708f8fSGustavo F. Padovan void *ptr = req->data; 3152c8f79162SAndrei Emeltchenko u16 size; 31530a708f8fSGustavo F. Padovan 315449208c9cSGustavo F. Padovan BT_DBG("chan %p", chan); 31550a708f8fSGustavo F. Padovan 315673ffa904SGustavo F. Padovan if (chan->num_conf_req || chan->num_conf_rsp) 31570a708f8fSGustavo F. Padovan goto done; 31580a708f8fSGustavo F. Padovan 31590c1bc5c6SGustavo F. Padovan switch (chan->mode) { 31600a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 31610a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 3162c1360a1cSGustavo F. Padovan if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) 31630a708f8fSGustavo F. Padovan break; 31640a708f8fSGustavo F. Padovan 3165f89cef09SAndrei Emeltchenko if (__l2cap_efs_supported(chan)) 3166f89cef09SAndrei Emeltchenko set_bit(FLAG_EFS_ENABLE, &chan->flags); 3167f89cef09SAndrei Emeltchenko 31680a708f8fSGustavo F. Padovan /* fall through */ 31690a708f8fSGustavo F. Padovan default: 31708c1d787bSGustavo F. Padovan chan->mode = l2cap_select_mode(rfc.mode, chan->conn->feat_mask); 31710a708f8fSGustavo F. Padovan break; 31720a708f8fSGustavo F. Padovan } 31730a708f8fSGustavo F. Padovan 31740a708f8fSGustavo F. Padovan done: 31750c1bc5c6SGustavo F. Padovan if (chan->imtu != L2CAP_DEFAULT_MTU) 31760c1bc5c6SGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); 31770a708f8fSGustavo F. Padovan 31780c1bc5c6SGustavo F. Padovan switch (chan->mode) { 31790a708f8fSGustavo F. Padovan case L2CAP_MODE_BASIC: 31808c1d787bSGustavo F. Padovan if (!(chan->conn->feat_mask & L2CAP_FEAT_ERTM) && 31818c1d787bSGustavo F. Padovan !(chan->conn->feat_mask & L2CAP_FEAT_STREAMING)) 31820a708f8fSGustavo F. Padovan break; 31830a708f8fSGustavo F. Padovan 31840a708f8fSGustavo F. Padovan rfc.mode = L2CAP_MODE_BASIC; 31850a708f8fSGustavo F. Padovan rfc.txwin_size = 0; 31860a708f8fSGustavo F. Padovan rfc.max_transmit = 0; 31870a708f8fSGustavo F. Padovan rfc.retrans_timeout = 0; 31880a708f8fSGustavo F. Padovan rfc.monitor_timeout = 0; 31890a708f8fSGustavo F. Padovan rfc.max_pdu_size = 0; 31900a708f8fSGustavo F. Padovan 31910a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), 31920a708f8fSGustavo F. Padovan (unsigned long) &rfc); 31930a708f8fSGustavo F. Padovan break; 31940a708f8fSGustavo F. Padovan 31950a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 31960a708f8fSGustavo F. Padovan rfc.mode = L2CAP_MODE_ERTM; 319747d1ec61SGustavo F. Padovan rfc.max_transmit = chan->max_tx; 319836c86c85SMat Martineau 319936c86c85SMat Martineau __l2cap_set_ertm_timeouts(chan, &rfc); 3200c8f79162SAndrei Emeltchenko 3201c8f79162SAndrei Emeltchenko size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu - 32022d792818SGustavo Padovan L2CAP_EXT_HDR_SIZE - L2CAP_SDULEN_SIZE - 3203c8f79162SAndrei Emeltchenko L2CAP_FCS_SIZE); 3204c8f79162SAndrei Emeltchenko rfc.max_pdu_size = cpu_to_le16(size); 32050a708f8fSGustavo F. Padovan 32066327eb98SAndrei Emeltchenko l2cap_txwin_setup(chan); 32076327eb98SAndrei Emeltchenko 32086327eb98SAndrei Emeltchenko rfc.txwin_size = min_t(u16, chan->tx_win, 32096327eb98SAndrei Emeltchenko L2CAP_DEFAULT_TX_WINDOW); 32100a708f8fSGustavo F. Padovan 32110a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), 32120a708f8fSGustavo F. Padovan (unsigned long) &rfc); 32130a708f8fSGustavo F. Padovan 3214f89cef09SAndrei Emeltchenko if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) 3215f89cef09SAndrei Emeltchenko l2cap_add_opt_efs(&ptr, chan); 3216f89cef09SAndrei Emeltchenko 32176327eb98SAndrei Emeltchenko if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 32186327eb98SAndrei Emeltchenko l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, 32196327eb98SAndrei Emeltchenko chan->tx_win); 322060918918SAndrei Emeltchenko 322160918918SAndrei Emeltchenko if (chan->conn->feat_mask & L2CAP_FEAT_FCS) 322260918918SAndrei Emeltchenko if (chan->fcs == L2CAP_FCS_NONE || 3223f2592d3eSAndrei Emeltchenko test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) { 322460918918SAndrei Emeltchenko chan->fcs = L2CAP_FCS_NONE; 322560918918SAndrei Emeltchenko l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, 322660918918SAndrei Emeltchenko chan->fcs); 322760918918SAndrei Emeltchenko } 32280a708f8fSGustavo F. Padovan break; 32290a708f8fSGustavo F. Padovan 32300a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 3231273759e2SMat Martineau l2cap_txwin_setup(chan); 32320a708f8fSGustavo F. Padovan rfc.mode = L2CAP_MODE_STREAMING; 32330a708f8fSGustavo F. Padovan rfc.txwin_size = 0; 32340a708f8fSGustavo F. Padovan rfc.max_transmit = 0; 32350a708f8fSGustavo F. Padovan rfc.retrans_timeout = 0; 32360a708f8fSGustavo F. Padovan rfc.monitor_timeout = 0; 3237c8f79162SAndrei Emeltchenko 3238c8f79162SAndrei Emeltchenko size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu - 32392d792818SGustavo Padovan L2CAP_EXT_HDR_SIZE - L2CAP_SDULEN_SIZE - 3240c8f79162SAndrei Emeltchenko L2CAP_FCS_SIZE); 3241c8f79162SAndrei Emeltchenko rfc.max_pdu_size = cpu_to_le16(size); 32420a708f8fSGustavo F. Padovan 32430a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), 32440a708f8fSGustavo F. Padovan (unsigned long) &rfc); 32450a708f8fSGustavo F. Padovan 3246f89cef09SAndrei Emeltchenko if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) 3247f89cef09SAndrei Emeltchenko l2cap_add_opt_efs(&ptr, chan); 3248f89cef09SAndrei Emeltchenko 324960918918SAndrei Emeltchenko if (chan->conn->feat_mask & L2CAP_FEAT_FCS) 325047d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_NONE || 3251f2592d3eSAndrei Emeltchenko test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) { 325247d1ec61SGustavo F. Padovan chan->fcs = L2CAP_FCS_NONE; 325360918918SAndrei Emeltchenko l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, 325460918918SAndrei Emeltchenko chan->fcs); 32550a708f8fSGustavo F. Padovan } 32560a708f8fSGustavo F. Padovan break; 32570a708f8fSGustavo F. Padovan } 32580a708f8fSGustavo F. Padovan 3259fe4128e0SGustavo F. Padovan req->dcid = cpu_to_le16(chan->dcid); 326059e54bd1SAndrei Emeltchenko req->flags = __constant_cpu_to_le16(0); 32610a708f8fSGustavo F. Padovan 32620a708f8fSGustavo F. Padovan return ptr - data; 32630a708f8fSGustavo F. Padovan } 32640a708f8fSGustavo F. Padovan 326573ffa904SGustavo F. Padovan static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data) 32660a708f8fSGustavo F. Padovan { 32670a708f8fSGustavo F. Padovan struct l2cap_conf_rsp *rsp = data; 32680a708f8fSGustavo F. Padovan void *ptr = rsp->data; 326973ffa904SGustavo F. Padovan void *req = chan->conf_req; 327073ffa904SGustavo F. Padovan int len = chan->conf_len; 32710a708f8fSGustavo F. Padovan int type, hint, olen; 32720a708f8fSGustavo F. Padovan unsigned long val; 32730a708f8fSGustavo F. Padovan struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; 327442dceae2SAndrei Emeltchenko struct l2cap_conf_efs efs; 327542dceae2SAndrei Emeltchenko u8 remote_efs = 0; 32760a708f8fSGustavo F. Padovan u16 mtu = L2CAP_DEFAULT_MTU; 32770a708f8fSGustavo F. Padovan u16 result = L2CAP_CONF_SUCCESS; 3278c8f79162SAndrei Emeltchenko u16 size; 32790a708f8fSGustavo F. Padovan 328073ffa904SGustavo F. Padovan BT_DBG("chan %p", chan); 32810a708f8fSGustavo F. Padovan 32820a708f8fSGustavo F. Padovan while (len >= L2CAP_CONF_OPT_SIZE) { 32830a708f8fSGustavo F. Padovan len -= l2cap_get_conf_opt(&req, &type, &olen, &val); 32840a708f8fSGustavo F. Padovan 32850a708f8fSGustavo F. Padovan hint = type & L2CAP_CONF_HINT; 32860a708f8fSGustavo F. Padovan type &= L2CAP_CONF_MASK; 32870a708f8fSGustavo F. Padovan 32880a708f8fSGustavo F. Padovan switch (type) { 32890a708f8fSGustavo F. Padovan case L2CAP_CONF_MTU: 32900a708f8fSGustavo F. Padovan mtu = val; 32910a708f8fSGustavo F. Padovan break; 32920a708f8fSGustavo F. Padovan 32930a708f8fSGustavo F. Padovan case L2CAP_CONF_FLUSH_TO: 32940c1bc5c6SGustavo F. Padovan chan->flush_to = val; 32950a708f8fSGustavo F. Padovan break; 32960a708f8fSGustavo F. Padovan 32970a708f8fSGustavo F. Padovan case L2CAP_CONF_QOS: 32980a708f8fSGustavo F. Padovan break; 32990a708f8fSGustavo F. Padovan 33000a708f8fSGustavo F. Padovan case L2CAP_CONF_RFC: 33010a708f8fSGustavo F. Padovan if (olen == sizeof(rfc)) 33020a708f8fSGustavo F. Padovan memcpy(&rfc, (void *) val, olen); 33030a708f8fSGustavo F. Padovan break; 33040a708f8fSGustavo F. Padovan 33050a708f8fSGustavo F. Padovan case L2CAP_CONF_FCS: 33060a708f8fSGustavo F. Padovan if (val == L2CAP_FCS_NONE) 3307f2592d3eSAndrei Emeltchenko set_bit(CONF_RECV_NO_FCS, &chan->conf_state); 330842dceae2SAndrei Emeltchenko break; 33090a708f8fSGustavo F. Padovan 331042dceae2SAndrei Emeltchenko case L2CAP_CONF_EFS: 331142dceae2SAndrei Emeltchenko remote_efs = 1; 331242dceae2SAndrei Emeltchenko if (olen == sizeof(efs)) 331342dceae2SAndrei Emeltchenko memcpy(&efs, (void *) val, olen); 33140a708f8fSGustavo F. Padovan break; 33150a708f8fSGustavo F. Padovan 33166327eb98SAndrei Emeltchenko case L2CAP_CONF_EWS: 33176327eb98SAndrei Emeltchenko if (!enable_hs) 33186327eb98SAndrei Emeltchenko return -ECONNREFUSED; 33196327eb98SAndrei Emeltchenko 33206327eb98SAndrei Emeltchenko set_bit(FLAG_EXT_CTRL, &chan->flags); 33216327eb98SAndrei Emeltchenko set_bit(CONF_EWS_RECV, &chan->conf_state); 3322836be934SAndrei Emeltchenko chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW; 33236327eb98SAndrei Emeltchenko chan->remote_tx_win = val; 33240a708f8fSGustavo F. Padovan break; 33250a708f8fSGustavo F. Padovan 33260a708f8fSGustavo F. Padovan default: 33270a708f8fSGustavo F. Padovan if (hint) 33280a708f8fSGustavo F. Padovan break; 33290a708f8fSGustavo F. Padovan 33300a708f8fSGustavo F. Padovan result = L2CAP_CONF_UNKNOWN; 33310a708f8fSGustavo F. Padovan *((u8 *) ptr++) = type; 33320a708f8fSGustavo F. Padovan break; 33330a708f8fSGustavo F. Padovan } 33340a708f8fSGustavo F. Padovan } 33350a708f8fSGustavo F. Padovan 333673ffa904SGustavo F. Padovan if (chan->num_conf_rsp || chan->num_conf_req > 1) 33370a708f8fSGustavo F. Padovan goto done; 33380a708f8fSGustavo F. Padovan 33390c1bc5c6SGustavo F. Padovan switch (chan->mode) { 33400a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 33410a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 3342c1360a1cSGustavo F. Padovan if (!test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) { 33430c1bc5c6SGustavo F. Padovan chan->mode = l2cap_select_mode(rfc.mode, 33448c1d787bSGustavo F. Padovan chan->conn->feat_mask); 33450a708f8fSGustavo F. Padovan break; 33460a708f8fSGustavo F. Padovan } 33470a708f8fSGustavo F. Padovan 334842dceae2SAndrei Emeltchenko if (remote_efs) { 334942dceae2SAndrei Emeltchenko if (__l2cap_efs_supported(chan)) 335042dceae2SAndrei Emeltchenko set_bit(FLAG_EFS_ENABLE, &chan->flags); 335142dceae2SAndrei Emeltchenko else 335242dceae2SAndrei Emeltchenko return -ECONNREFUSED; 335342dceae2SAndrei Emeltchenko } 335442dceae2SAndrei Emeltchenko 33550c1bc5c6SGustavo F. Padovan if (chan->mode != rfc.mode) 33560a708f8fSGustavo F. Padovan return -ECONNREFUSED; 33570a708f8fSGustavo F. Padovan 33580a708f8fSGustavo F. Padovan break; 33590a708f8fSGustavo F. Padovan } 33600a708f8fSGustavo F. Padovan 33610a708f8fSGustavo F. Padovan done: 33620c1bc5c6SGustavo F. Padovan if (chan->mode != rfc.mode) { 33630a708f8fSGustavo F. Padovan result = L2CAP_CONF_UNACCEPT; 33640c1bc5c6SGustavo F. Padovan rfc.mode = chan->mode; 33650a708f8fSGustavo F. Padovan 336673ffa904SGustavo F. Padovan if (chan->num_conf_rsp == 1) 33670a708f8fSGustavo F. Padovan return -ECONNREFUSED; 33680a708f8fSGustavo F. Padovan 33692d792818SGustavo Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), 33702d792818SGustavo Padovan (unsigned long) &rfc); 33710a708f8fSGustavo F. Padovan } 33720a708f8fSGustavo F. Padovan 33730a708f8fSGustavo F. Padovan if (result == L2CAP_CONF_SUCCESS) { 33740a708f8fSGustavo F. Padovan /* Configure output options and let the other side know 33750a708f8fSGustavo F. Padovan * which ones we don't like. */ 33760a708f8fSGustavo F. Padovan 33770a708f8fSGustavo F. Padovan if (mtu < L2CAP_DEFAULT_MIN_MTU) 33780a708f8fSGustavo F. Padovan result = L2CAP_CONF_UNACCEPT; 33790a708f8fSGustavo F. Padovan else { 33800c1bc5c6SGustavo F. Padovan chan->omtu = mtu; 3381c1360a1cSGustavo F. Padovan set_bit(CONF_MTU_DONE, &chan->conf_state); 33820a708f8fSGustavo F. Padovan } 33830c1bc5c6SGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu); 33840a708f8fSGustavo F. Padovan 338542dceae2SAndrei Emeltchenko if (remote_efs) { 338642dceae2SAndrei Emeltchenko if (chan->local_stype != L2CAP_SERV_NOTRAFIC && 338742dceae2SAndrei Emeltchenko efs.stype != L2CAP_SERV_NOTRAFIC && 338842dceae2SAndrei Emeltchenko efs.stype != chan->local_stype) { 338942dceae2SAndrei Emeltchenko 339042dceae2SAndrei Emeltchenko result = L2CAP_CONF_UNACCEPT; 339142dceae2SAndrei Emeltchenko 339242dceae2SAndrei Emeltchenko if (chan->num_conf_req >= 1) 339342dceae2SAndrei Emeltchenko return -ECONNREFUSED; 339442dceae2SAndrei Emeltchenko 339542dceae2SAndrei Emeltchenko l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, 339642dceae2SAndrei Emeltchenko sizeof(efs), 339742dceae2SAndrei Emeltchenko (unsigned long) &efs); 33980e8b207eSAndrei Emeltchenko } else { 33993e6b3b95SGustavo F. Padovan /* Send PENDING Conf Rsp */ 34000e8b207eSAndrei Emeltchenko result = L2CAP_CONF_PENDING; 34010e8b207eSAndrei Emeltchenko set_bit(CONF_LOC_CONF_PEND, &chan->conf_state); 340242dceae2SAndrei Emeltchenko } 340342dceae2SAndrei Emeltchenko } 340442dceae2SAndrei Emeltchenko 34050a708f8fSGustavo F. Padovan switch (rfc.mode) { 34060a708f8fSGustavo F. Padovan case L2CAP_MODE_BASIC: 340747d1ec61SGustavo F. Padovan chan->fcs = L2CAP_FCS_NONE; 3408c1360a1cSGustavo F. Padovan set_bit(CONF_MODE_DONE, &chan->conf_state); 34090a708f8fSGustavo F. Padovan break; 34100a708f8fSGustavo F. Padovan 34110a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 34126327eb98SAndrei Emeltchenko if (!test_bit(CONF_EWS_RECV, &chan->conf_state)) 34132c03a7a4SGustavo F. Padovan chan->remote_tx_win = rfc.txwin_size; 34146327eb98SAndrei Emeltchenko else 34156327eb98SAndrei Emeltchenko rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW; 34166327eb98SAndrei Emeltchenko 34172c03a7a4SGustavo F. Padovan chan->remote_max_tx = rfc.max_transmit; 34180a708f8fSGustavo F. Padovan 3419c8f79162SAndrei Emeltchenko size = min_t(u16, le16_to_cpu(rfc.max_pdu_size), 34202d792818SGustavo Padovan chan->conn->mtu - L2CAP_EXT_HDR_SIZE - 34212d792818SGustavo Padovan L2CAP_SDULEN_SIZE - L2CAP_FCS_SIZE); 3422c8f79162SAndrei Emeltchenko rfc.max_pdu_size = cpu_to_le16(size); 3423c8f79162SAndrei Emeltchenko chan->remote_mps = size; 34240a708f8fSGustavo F. Padovan 342536c86c85SMat Martineau __l2cap_set_ertm_timeouts(chan, &rfc); 34260a708f8fSGustavo F. Padovan 3427c1360a1cSGustavo F. Padovan set_bit(CONF_MODE_DONE, &chan->conf_state); 34280a708f8fSGustavo F. Padovan 34290a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, 34300a708f8fSGustavo F. Padovan sizeof(rfc), (unsigned long) &rfc); 34310a708f8fSGustavo F. Padovan 343242dceae2SAndrei Emeltchenko if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) { 343342dceae2SAndrei Emeltchenko chan->remote_id = efs.id; 343442dceae2SAndrei Emeltchenko chan->remote_stype = efs.stype; 343542dceae2SAndrei Emeltchenko chan->remote_msdu = le16_to_cpu(efs.msdu); 343642dceae2SAndrei Emeltchenko chan->remote_flush_to = 343742dceae2SAndrei Emeltchenko le32_to_cpu(efs.flush_to); 343842dceae2SAndrei Emeltchenko chan->remote_acc_lat = 343942dceae2SAndrei Emeltchenko le32_to_cpu(efs.acc_lat); 344042dceae2SAndrei Emeltchenko chan->remote_sdu_itime = 344142dceae2SAndrei Emeltchenko le32_to_cpu(efs.sdu_itime); 344242dceae2SAndrei Emeltchenko l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, 34432d792818SGustavo Padovan sizeof(efs), 34442d792818SGustavo Padovan (unsigned long) &efs); 344542dceae2SAndrei Emeltchenko } 34460a708f8fSGustavo F. Padovan break; 34470a708f8fSGustavo F. Padovan 34480a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 3449c8f79162SAndrei Emeltchenko size = min_t(u16, le16_to_cpu(rfc.max_pdu_size), 34502d792818SGustavo Padovan chan->conn->mtu - L2CAP_EXT_HDR_SIZE - 34512d792818SGustavo Padovan L2CAP_SDULEN_SIZE - L2CAP_FCS_SIZE); 3452c8f79162SAndrei Emeltchenko rfc.max_pdu_size = cpu_to_le16(size); 3453c8f79162SAndrei Emeltchenko chan->remote_mps = size; 34540a708f8fSGustavo F. Padovan 3455c1360a1cSGustavo F. Padovan set_bit(CONF_MODE_DONE, &chan->conf_state); 34560a708f8fSGustavo F. Padovan 34572d792818SGustavo Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), 34582d792818SGustavo Padovan (unsigned long) &rfc); 34590a708f8fSGustavo F. Padovan 34600a708f8fSGustavo F. Padovan break; 34610a708f8fSGustavo F. Padovan 34620a708f8fSGustavo F. Padovan default: 34630a708f8fSGustavo F. Padovan result = L2CAP_CONF_UNACCEPT; 34640a708f8fSGustavo F. Padovan 34650a708f8fSGustavo F. Padovan memset(&rfc, 0, sizeof(rfc)); 34660c1bc5c6SGustavo F. Padovan rfc.mode = chan->mode; 34670a708f8fSGustavo F. Padovan } 34680a708f8fSGustavo F. Padovan 34690a708f8fSGustavo F. Padovan if (result == L2CAP_CONF_SUCCESS) 3470c1360a1cSGustavo F. Padovan set_bit(CONF_OUTPUT_DONE, &chan->conf_state); 34710a708f8fSGustavo F. Padovan } 3472fe4128e0SGustavo F. Padovan rsp->scid = cpu_to_le16(chan->dcid); 34730a708f8fSGustavo F. Padovan rsp->result = cpu_to_le16(result); 347459e54bd1SAndrei Emeltchenko rsp->flags = __constant_cpu_to_le16(0); 34750a708f8fSGustavo F. Padovan 34760a708f8fSGustavo F. Padovan return ptr - data; 34770a708f8fSGustavo F. Padovan } 34780a708f8fSGustavo F. Padovan 34792d792818SGustavo Padovan static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len, 34802d792818SGustavo Padovan void *data, u16 *result) 34810a708f8fSGustavo F. Padovan { 34820a708f8fSGustavo F. Padovan struct l2cap_conf_req *req = data; 34830a708f8fSGustavo F. Padovan void *ptr = req->data; 34840a708f8fSGustavo F. Padovan int type, olen; 34850a708f8fSGustavo F. Padovan unsigned long val; 348636e999a8SMat Martineau struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; 348766af7aafSAndrei Emeltchenko struct l2cap_conf_efs efs; 34880a708f8fSGustavo F. Padovan 3489fe4128e0SGustavo F. Padovan BT_DBG("chan %p, rsp %p, len %d, req %p", chan, rsp, len, data); 34900a708f8fSGustavo F. Padovan 34910a708f8fSGustavo F. Padovan while (len >= L2CAP_CONF_OPT_SIZE) { 34920a708f8fSGustavo F. Padovan len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); 34930a708f8fSGustavo F. Padovan 34940a708f8fSGustavo F. Padovan switch (type) { 34950a708f8fSGustavo F. Padovan case L2CAP_CONF_MTU: 34960a708f8fSGustavo F. Padovan if (val < L2CAP_DEFAULT_MIN_MTU) { 34970a708f8fSGustavo F. Padovan *result = L2CAP_CONF_UNACCEPT; 34980c1bc5c6SGustavo F. Padovan chan->imtu = L2CAP_DEFAULT_MIN_MTU; 34990a708f8fSGustavo F. Padovan } else 35000c1bc5c6SGustavo F. Padovan chan->imtu = val; 35010c1bc5c6SGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); 35020a708f8fSGustavo F. Padovan break; 35030a708f8fSGustavo F. Padovan 35040a708f8fSGustavo F. Padovan case L2CAP_CONF_FLUSH_TO: 35050c1bc5c6SGustavo F. Padovan chan->flush_to = val; 35060a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 35070c1bc5c6SGustavo F. Padovan 2, chan->flush_to); 35080a708f8fSGustavo F. Padovan break; 35090a708f8fSGustavo F. Padovan 35100a708f8fSGustavo F. Padovan case L2CAP_CONF_RFC: 35110a708f8fSGustavo F. Padovan if (olen == sizeof(rfc)) 35120a708f8fSGustavo F. Padovan memcpy(&rfc, (void *)val, olen); 35130a708f8fSGustavo F. Padovan 3514c1360a1cSGustavo F. Padovan if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) && 35150c1bc5c6SGustavo F. Padovan rfc.mode != chan->mode) 35160a708f8fSGustavo F. Padovan return -ECONNREFUSED; 35170a708f8fSGustavo F. Padovan 351847d1ec61SGustavo F. Padovan chan->fcs = 0; 35190a708f8fSGustavo F. Padovan 35200a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, 35210a708f8fSGustavo F. Padovan sizeof(rfc), (unsigned long) &rfc); 35220a708f8fSGustavo F. Padovan break; 35236327eb98SAndrei Emeltchenko 35246327eb98SAndrei Emeltchenko case L2CAP_CONF_EWS: 3525c20f8e35SMat Martineau chan->ack_win = min_t(u16, val, chan->ack_win); 35263e6b3b95SGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, 35273e6b3b95SGustavo F. Padovan chan->tx_win); 35286327eb98SAndrei Emeltchenko break; 352966af7aafSAndrei Emeltchenko 353066af7aafSAndrei Emeltchenko case L2CAP_CONF_EFS: 353166af7aafSAndrei Emeltchenko if (olen == sizeof(efs)) 353266af7aafSAndrei Emeltchenko memcpy(&efs, (void *)val, olen); 353366af7aafSAndrei Emeltchenko 353466af7aafSAndrei Emeltchenko if (chan->local_stype != L2CAP_SERV_NOTRAFIC && 353566af7aafSAndrei Emeltchenko efs.stype != L2CAP_SERV_NOTRAFIC && 353666af7aafSAndrei Emeltchenko efs.stype != chan->local_stype) 353766af7aafSAndrei Emeltchenko return -ECONNREFUSED; 353866af7aafSAndrei Emeltchenko 35392d792818SGustavo Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs), 35402d792818SGustavo Padovan (unsigned long) &efs); 354166af7aafSAndrei Emeltchenko break; 3542cbabee78SAndrei Emeltchenko 3543cbabee78SAndrei Emeltchenko case L2CAP_CONF_FCS: 3544cbabee78SAndrei Emeltchenko if (*result == L2CAP_CONF_PENDING) 3545cbabee78SAndrei Emeltchenko if (val == L2CAP_FCS_NONE) 3546f2592d3eSAndrei Emeltchenko set_bit(CONF_RECV_NO_FCS, 3547cbabee78SAndrei Emeltchenko &chan->conf_state); 3548cbabee78SAndrei Emeltchenko break; 35490a708f8fSGustavo F. Padovan } 35500a708f8fSGustavo F. Padovan } 35510a708f8fSGustavo F. Padovan 35520c1bc5c6SGustavo F. Padovan if (chan->mode == L2CAP_MODE_BASIC && chan->mode != rfc.mode) 35530a708f8fSGustavo F. Padovan return -ECONNREFUSED; 35540a708f8fSGustavo F. Padovan 35550c1bc5c6SGustavo F. Padovan chan->mode = rfc.mode; 35560a708f8fSGustavo F. Padovan 35570e8b207eSAndrei Emeltchenko if (*result == L2CAP_CONF_SUCCESS || *result == L2CAP_CONF_PENDING) { 35580a708f8fSGustavo F. Padovan switch (rfc.mode) { 35590a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 356047d1ec61SGustavo F. Padovan chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); 356147d1ec61SGustavo F. Padovan chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); 356247d1ec61SGustavo F. Padovan chan->mps = le16_to_cpu(rfc.max_pdu_size); 3563c20f8e35SMat Martineau if (!test_bit(FLAG_EXT_CTRL, &chan->flags)) 3564c20f8e35SMat Martineau chan->ack_win = min_t(u16, chan->ack_win, 3565c20f8e35SMat Martineau rfc.txwin_size); 356666af7aafSAndrei Emeltchenko 356766af7aafSAndrei Emeltchenko if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) { 356866af7aafSAndrei Emeltchenko chan->local_msdu = le16_to_cpu(efs.msdu); 356966af7aafSAndrei Emeltchenko chan->local_sdu_itime = 357066af7aafSAndrei Emeltchenko le32_to_cpu(efs.sdu_itime); 357166af7aafSAndrei Emeltchenko chan->local_acc_lat = le32_to_cpu(efs.acc_lat); 357266af7aafSAndrei Emeltchenko chan->local_flush_to = 357366af7aafSAndrei Emeltchenko le32_to_cpu(efs.flush_to); 357466af7aafSAndrei Emeltchenko } 35750a708f8fSGustavo F. Padovan break; 357666af7aafSAndrei Emeltchenko 35770a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 357847d1ec61SGustavo F. Padovan chan->mps = le16_to_cpu(rfc.max_pdu_size); 35790a708f8fSGustavo F. Padovan } 35800a708f8fSGustavo F. Padovan } 35810a708f8fSGustavo F. Padovan 3582fe4128e0SGustavo F. Padovan req->dcid = cpu_to_le16(chan->dcid); 358359e54bd1SAndrei Emeltchenko req->flags = __constant_cpu_to_le16(0); 35840a708f8fSGustavo F. Padovan 35850a708f8fSGustavo F. Padovan return ptr - data; 35860a708f8fSGustavo F. Padovan } 35870a708f8fSGustavo F. Padovan 35882d792818SGustavo Padovan static int l2cap_build_conf_rsp(struct l2cap_chan *chan, void *data, 35892d792818SGustavo Padovan u16 result, u16 flags) 35900a708f8fSGustavo F. Padovan { 35910a708f8fSGustavo F. Padovan struct l2cap_conf_rsp *rsp = data; 35920a708f8fSGustavo F. Padovan void *ptr = rsp->data; 35930a708f8fSGustavo F. Padovan 3594fe4128e0SGustavo F. Padovan BT_DBG("chan %p", chan); 35950a708f8fSGustavo F. Padovan 3596fe4128e0SGustavo F. Padovan rsp->scid = cpu_to_le16(chan->dcid); 35970a708f8fSGustavo F. Padovan rsp->result = cpu_to_le16(result); 35980a708f8fSGustavo F. Padovan rsp->flags = cpu_to_le16(flags); 35990a708f8fSGustavo F. Padovan 36000a708f8fSGustavo F. Padovan return ptr - data; 36010a708f8fSGustavo F. Padovan } 36020a708f8fSGustavo F. Padovan 36038c1d787bSGustavo F. Padovan void __l2cap_connect_rsp_defer(struct l2cap_chan *chan) 3604710f9b0aSGustavo F. Padovan { 3605710f9b0aSGustavo F. Padovan struct l2cap_conn_rsp rsp; 36068c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 3607710f9b0aSGustavo F. Padovan u8 buf[128]; 3608439f34acSAndrei Emeltchenko u8 rsp_code; 3609710f9b0aSGustavo F. Padovan 3610fe4128e0SGustavo F. Padovan rsp.scid = cpu_to_le16(chan->dcid); 3611fe4128e0SGustavo F. Padovan rsp.dcid = cpu_to_le16(chan->scid); 3612ac73498cSAndrei Emeltchenko rsp.result = __constant_cpu_to_le16(L2CAP_CR_SUCCESS); 3613ac73498cSAndrei Emeltchenko rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO); 3614439f34acSAndrei Emeltchenko 3615439f34acSAndrei Emeltchenko if (chan->hs_hcon) 3616439f34acSAndrei Emeltchenko rsp_code = L2CAP_CREATE_CHAN_RSP; 3617439f34acSAndrei Emeltchenko else 3618439f34acSAndrei Emeltchenko rsp_code = L2CAP_CONN_RSP; 3619439f34acSAndrei Emeltchenko 3620439f34acSAndrei Emeltchenko BT_DBG("chan %p rsp_code %u", chan, rsp_code); 3621439f34acSAndrei Emeltchenko 3622439f34acSAndrei Emeltchenko l2cap_send_cmd(conn, chan->ident, rsp_code, sizeof(rsp), &rsp); 3623710f9b0aSGustavo F. Padovan 3624c1360a1cSGustavo F. Padovan if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) 3625710f9b0aSGustavo F. Padovan return; 3626710f9b0aSGustavo F. Padovan 3627710f9b0aSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, 3628710f9b0aSGustavo F. Padovan l2cap_build_conf_req(chan, buf), buf); 3629710f9b0aSGustavo F. Padovan chan->num_conf_req++; 3630710f9b0aSGustavo F. Padovan } 3631710f9b0aSGustavo F. Padovan 363247d1ec61SGustavo F. Padovan static void l2cap_conf_rfc_get(struct l2cap_chan *chan, void *rsp, int len) 36330a708f8fSGustavo F. Padovan { 36340a708f8fSGustavo F. Padovan int type, olen; 36350a708f8fSGustavo F. Padovan unsigned long val; 3636c20f8e35SMat Martineau /* Use sane default values in case a misbehaving remote device 3637c20f8e35SMat Martineau * did not send an RFC or extended window size option. 3638c20f8e35SMat Martineau */ 3639c20f8e35SMat Martineau u16 txwin_ext = chan->ack_win; 3640c20f8e35SMat Martineau struct l2cap_conf_rfc rfc = { 3641c20f8e35SMat Martineau .mode = chan->mode, 3642c20f8e35SMat Martineau .retrans_timeout = __constant_cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO), 3643c20f8e35SMat Martineau .monitor_timeout = __constant_cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO), 3644c20f8e35SMat Martineau .max_pdu_size = cpu_to_le16(chan->imtu), 3645c20f8e35SMat Martineau .txwin_size = min_t(u16, chan->ack_win, L2CAP_DEFAULT_TX_WINDOW), 3646c20f8e35SMat Martineau }; 36470a708f8fSGustavo F. Padovan 364847d1ec61SGustavo F. Padovan BT_DBG("chan %p, rsp %p, len %d", chan, rsp, len); 36490a708f8fSGustavo F. Padovan 36500c1bc5c6SGustavo F. Padovan if ((chan->mode != L2CAP_MODE_ERTM) && (chan->mode != L2CAP_MODE_STREAMING)) 36510a708f8fSGustavo F. Padovan return; 36520a708f8fSGustavo F. Padovan 36530a708f8fSGustavo F. Padovan while (len >= L2CAP_CONF_OPT_SIZE) { 36540a708f8fSGustavo F. Padovan len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); 36550a708f8fSGustavo F. Padovan 3656c20f8e35SMat Martineau switch (type) { 3657c20f8e35SMat Martineau case L2CAP_CONF_RFC: 3658c20f8e35SMat Martineau if (olen == sizeof(rfc)) 36590a708f8fSGustavo F. Padovan memcpy(&rfc, (void *)val, olen); 3660c20f8e35SMat Martineau break; 3661c20f8e35SMat Martineau case L2CAP_CONF_EWS: 3662c20f8e35SMat Martineau txwin_ext = val; 3663c20f8e35SMat Martineau break; 3664c20f8e35SMat Martineau } 36650a708f8fSGustavo F. Padovan } 36660a708f8fSGustavo F. Padovan 36670a708f8fSGustavo F. Padovan switch (rfc.mode) { 36680a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 366947d1ec61SGustavo F. Padovan chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); 367047d1ec61SGustavo F. Padovan chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); 367147d1ec61SGustavo F. Padovan chan->mps = le16_to_cpu(rfc.max_pdu_size); 3672c20f8e35SMat Martineau if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 3673c20f8e35SMat Martineau chan->ack_win = min_t(u16, chan->ack_win, txwin_ext); 3674c20f8e35SMat Martineau else 3675c20f8e35SMat Martineau chan->ack_win = min_t(u16, chan->ack_win, 3676c20f8e35SMat Martineau rfc.txwin_size); 36770a708f8fSGustavo F. Padovan break; 36780a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 367947d1ec61SGustavo F. Padovan chan->mps = le16_to_cpu(rfc.max_pdu_size); 36800a708f8fSGustavo F. Padovan } 36810a708f8fSGustavo F. Padovan } 36820a708f8fSGustavo F. Padovan 36832d792818SGustavo Padovan static inline int l2cap_command_rej(struct l2cap_conn *conn, 3684cb3b3152SJohan Hedberg struct l2cap_cmd_hdr *cmd, u16 cmd_len, 3685cb3b3152SJohan Hedberg u8 *data) 36860a708f8fSGustavo F. Padovan { 3687e2fd318eSIlia Kolomisnky struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data; 36880a708f8fSGustavo F. Padovan 3689cb3b3152SJohan Hedberg if (cmd_len < sizeof(*rej)) 3690cb3b3152SJohan Hedberg return -EPROTO; 3691cb3b3152SJohan Hedberg 3692e2fd318eSIlia Kolomisnky if (rej->reason != L2CAP_REJ_NOT_UNDERSTOOD) 36930a708f8fSGustavo F. Padovan return 0; 36940a708f8fSGustavo F. Padovan 36950a708f8fSGustavo F. Padovan if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && 36960a708f8fSGustavo F. Padovan cmd->ident == conn->info_ident) { 369717cd3f37SUlisses Furquim cancel_delayed_work(&conn->info_timer); 36980a708f8fSGustavo F. Padovan 36990a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; 37000a708f8fSGustavo F. Padovan conn->info_ident = 0; 37010a708f8fSGustavo F. Padovan 37020a708f8fSGustavo F. Padovan l2cap_conn_start(conn); 37030a708f8fSGustavo F. Padovan } 37040a708f8fSGustavo F. Padovan 37050a708f8fSGustavo F. Padovan return 0; 37060a708f8fSGustavo F. Padovan } 37070a708f8fSGustavo F. Padovan 37081700915fSMat Martineau static struct l2cap_chan *l2cap_connect(struct l2cap_conn *conn, 37091700915fSMat Martineau struct l2cap_cmd_hdr *cmd, 37104c89b6aaSMat Martineau u8 *data, u8 rsp_code, u8 amp_id) 37110a708f8fSGustavo F. Padovan { 37120a708f8fSGustavo F. Padovan struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; 37130a708f8fSGustavo F. Padovan struct l2cap_conn_rsp rsp; 371423691d75SGustavo F. Padovan struct l2cap_chan *chan = NULL, *pchan; 37150a708f8fSGustavo F. Padovan struct sock *parent, *sk = NULL; 37160a708f8fSGustavo F. Padovan int result, status = L2CAP_CS_NO_INFO; 37170a708f8fSGustavo F. Padovan 37180a708f8fSGustavo F. Padovan u16 dcid = 0, scid = __le16_to_cpu(req->scid); 37190a708f8fSGustavo F. Padovan __le16 psm = req->psm; 37200a708f8fSGustavo F. Padovan 3721097db76cSAndrei Emeltchenko BT_DBG("psm 0x%2.2x scid 0x%4.4x", __le16_to_cpu(psm), scid); 37220a708f8fSGustavo F. Padovan 37230a708f8fSGustavo F. Padovan /* Check if we have socket listening on psm */ 3724c2287681SIdo Yariv pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, conn->src, conn->dst); 372523691d75SGustavo F. Padovan if (!pchan) { 37260a708f8fSGustavo F. Padovan result = L2CAP_CR_BAD_PSM; 37270a708f8fSGustavo F. Padovan goto sendresp; 37280a708f8fSGustavo F. Padovan } 37290a708f8fSGustavo F. Padovan 373023691d75SGustavo F. Padovan parent = pchan->sk; 373123691d75SGustavo F. Padovan 37323df91ea2SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 3733aa2ac881SGustavo F. Padovan lock_sock(parent); 37340a708f8fSGustavo F. Padovan 37350a708f8fSGustavo F. Padovan /* Check if the ACL is secure enough (if not SDP) */ 37362983fd68SAndrei Emeltchenko if (psm != __constant_cpu_to_le16(L2CAP_PSM_SDP) && 37370a708f8fSGustavo F. Padovan !hci_conn_check_link_mode(conn->hcon)) { 37389f5a0d7bSAndrei Emeltchenko conn->disc_reason = HCI_ERROR_AUTH_FAILURE; 37390a708f8fSGustavo F. Padovan result = L2CAP_CR_SEC_BLOCK; 37400a708f8fSGustavo F. Padovan goto response; 37410a708f8fSGustavo F. Padovan } 37420a708f8fSGustavo F. Padovan 37430a708f8fSGustavo F. Padovan result = L2CAP_CR_NO_MEM; 37440a708f8fSGustavo F. Padovan 37452dfa1003SGustavo Padovan /* Check if we already have channel with that dcid */ 37462dfa1003SGustavo Padovan if (__l2cap_get_chan_by_dcid(conn, scid)) 37472dfa1003SGustavo Padovan goto response; 37482dfa1003SGustavo Padovan 374980b98027SGustavo Padovan chan = pchan->ops->new_connection(pchan); 375080808e43SGustavo F. Padovan if (!chan) 37510a708f8fSGustavo F. Padovan goto response; 37520a708f8fSGustavo F. Padovan 375380808e43SGustavo F. Padovan sk = chan->sk; 375480808e43SGustavo F. Padovan 37550a708f8fSGustavo F. Padovan bacpy(&bt_sk(sk)->src, conn->src); 37560a708f8fSGustavo F. Padovan bacpy(&bt_sk(sk)->dst, conn->dst); 3757fe4128e0SGustavo F. Padovan chan->psm = psm; 3758fe4128e0SGustavo F. Padovan chan->dcid = scid; 37591700915fSMat Martineau chan->local_amp_id = amp_id; 37600a708f8fSGustavo F. Padovan 37616be36555SAndrei Emeltchenko __l2cap_chan_add(conn, chan); 376248454079SGustavo F. Padovan 3763fe4128e0SGustavo F. Padovan dcid = chan->scid; 37640a708f8fSGustavo F. Padovan 3765c9b66675SGustavo F. Padovan __set_chan_timer(chan, sk->sk_sndtimeo); 37660a708f8fSGustavo F. Padovan 3767fc7f8a7eSGustavo F. Padovan chan->ident = cmd->ident; 37680a708f8fSGustavo F. Padovan 37690a708f8fSGustavo F. Padovan if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { 3770d45fc423SGustavo F. Padovan if (l2cap_chan_check_security(chan)) { 3771c5daa683SGustavo Padovan if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { 37720e587be7SAndrei Emeltchenko __l2cap_state_change(chan, BT_CONNECT2); 37730a708f8fSGustavo F. Padovan result = L2CAP_CR_PEND; 37740a708f8fSGustavo F. Padovan status = L2CAP_CS_AUTHOR_PEND; 37752dc4e510SGustavo Padovan chan->ops->defer(chan); 37760a708f8fSGustavo F. Padovan } else { 37771700915fSMat Martineau /* Force pending result for AMP controllers. 37781700915fSMat Martineau * The connection will succeed after the 37791700915fSMat Martineau * physical link is up. 37801700915fSMat Martineau */ 37811700915fSMat Martineau if (amp_id) { 37821700915fSMat Martineau __l2cap_state_change(chan, BT_CONNECT2); 37831700915fSMat Martineau result = L2CAP_CR_PEND; 37841700915fSMat Martineau } else { 37850e587be7SAndrei Emeltchenko __l2cap_state_change(chan, BT_CONFIG); 37860a708f8fSGustavo F. Padovan result = L2CAP_CR_SUCCESS; 37871700915fSMat Martineau } 37880a708f8fSGustavo F. Padovan status = L2CAP_CS_NO_INFO; 37890a708f8fSGustavo F. Padovan } 37900a708f8fSGustavo F. Padovan } else { 37910e587be7SAndrei Emeltchenko __l2cap_state_change(chan, BT_CONNECT2); 37920a708f8fSGustavo F. Padovan result = L2CAP_CR_PEND; 37930a708f8fSGustavo F. Padovan status = L2CAP_CS_AUTHEN_PEND; 37940a708f8fSGustavo F. Padovan } 37950a708f8fSGustavo F. Padovan } else { 37960e587be7SAndrei Emeltchenko __l2cap_state_change(chan, BT_CONNECT2); 37970a708f8fSGustavo F. Padovan result = L2CAP_CR_PEND; 37980a708f8fSGustavo F. Padovan status = L2CAP_CS_NO_INFO; 37990a708f8fSGustavo F. Padovan } 38000a708f8fSGustavo F. Padovan 38010a708f8fSGustavo F. Padovan response: 3802aa2ac881SGustavo F. Padovan release_sock(parent); 38033df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 38040a708f8fSGustavo F. Padovan 38050a708f8fSGustavo F. Padovan sendresp: 38060a708f8fSGustavo F. Padovan rsp.scid = cpu_to_le16(scid); 38070a708f8fSGustavo F. Padovan rsp.dcid = cpu_to_le16(dcid); 38080a708f8fSGustavo F. Padovan rsp.result = cpu_to_le16(result); 38090a708f8fSGustavo F. Padovan rsp.status = cpu_to_le16(status); 38104c89b6aaSMat Martineau l2cap_send_cmd(conn, cmd->ident, rsp_code, sizeof(rsp), &rsp); 38110a708f8fSGustavo F. Padovan 38120a708f8fSGustavo F. Padovan if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { 38130a708f8fSGustavo F. Padovan struct l2cap_info_req info; 3814ac73498cSAndrei Emeltchenko info.type = __constant_cpu_to_le16(L2CAP_IT_FEAT_MASK); 38150a708f8fSGustavo F. Padovan 38160a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; 38170a708f8fSGustavo F. Padovan conn->info_ident = l2cap_get_ident(conn); 38180a708f8fSGustavo F. Padovan 3819ba13ccd9SMarcel Holtmann schedule_delayed_work(&conn->info_timer, L2CAP_INFO_TIMEOUT); 38200a708f8fSGustavo F. Padovan 38212d792818SGustavo Padovan l2cap_send_cmd(conn, conn->info_ident, L2CAP_INFO_REQ, 38222d792818SGustavo Padovan sizeof(info), &info); 38230a708f8fSGustavo F. Padovan } 38240a708f8fSGustavo F. Padovan 3825c1360a1cSGustavo F. Padovan if (chan && !test_bit(CONF_REQ_SENT, &chan->conf_state) && 38260a708f8fSGustavo F. Padovan result == L2CAP_CR_SUCCESS) { 38270a708f8fSGustavo F. Padovan u8 buf[128]; 3828c1360a1cSGustavo F. Padovan set_bit(CONF_REQ_SENT, &chan->conf_state); 38290a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, 383073ffa904SGustavo F. Padovan l2cap_build_conf_req(chan, buf), buf); 383173ffa904SGustavo F. Padovan chan->num_conf_req++; 38320a708f8fSGustavo F. Padovan } 38331700915fSMat Martineau 38341700915fSMat Martineau return chan; 38354c89b6aaSMat Martineau } 38360a708f8fSGustavo F. Padovan 38374c89b6aaSMat Martineau static int l2cap_connect_req(struct l2cap_conn *conn, 3838cb3b3152SJohan Hedberg struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) 38394c89b6aaSMat Martineau { 38407b064edaSJaganath Kanakkassery struct hci_dev *hdev = conn->hcon->hdev; 38417b064edaSJaganath Kanakkassery struct hci_conn *hcon = conn->hcon; 38427b064edaSJaganath Kanakkassery 3843cb3b3152SJohan Hedberg if (cmd_len < sizeof(struct l2cap_conn_req)) 3844cb3b3152SJohan Hedberg return -EPROTO; 3845cb3b3152SJohan Hedberg 38467b064edaSJaganath Kanakkassery hci_dev_lock(hdev); 38477b064edaSJaganath Kanakkassery if (test_bit(HCI_MGMT, &hdev->dev_flags) && 38487b064edaSJaganath Kanakkassery !test_and_set_bit(HCI_CONN_MGMT_CONNECTED, &hcon->flags)) 38497b064edaSJaganath Kanakkassery mgmt_device_connected(hdev, &hcon->dst, hcon->type, 38507b064edaSJaganath Kanakkassery hcon->dst_type, 0, NULL, 0, 38517b064edaSJaganath Kanakkassery hcon->dev_class); 38527b064edaSJaganath Kanakkassery hci_dev_unlock(hdev); 38537b064edaSJaganath Kanakkassery 3854300229f9SGustavo Padovan l2cap_connect(conn, cmd, data, L2CAP_CONN_RSP, 0); 38550a708f8fSGustavo F. Padovan return 0; 38560a708f8fSGustavo F. Padovan } 38570a708f8fSGustavo F. Padovan 38585909cf30SMat Martineau static int l2cap_connect_create_rsp(struct l2cap_conn *conn, 3859cb3b3152SJohan Hedberg struct l2cap_cmd_hdr *cmd, u16 cmd_len, 3860cb3b3152SJohan Hedberg u8 *data) 38610a708f8fSGustavo F. Padovan { 38620a708f8fSGustavo F. Padovan struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; 38630a708f8fSGustavo F. Padovan u16 scid, dcid, result, status; 386448454079SGustavo F. Padovan struct l2cap_chan *chan; 38650a708f8fSGustavo F. Padovan u8 req[128]; 38663df91ea2SAndrei Emeltchenko int err; 38670a708f8fSGustavo F. Padovan 3868cb3b3152SJohan Hedberg if (cmd_len < sizeof(*rsp)) 3869cb3b3152SJohan Hedberg return -EPROTO; 3870cb3b3152SJohan Hedberg 38710a708f8fSGustavo F. Padovan scid = __le16_to_cpu(rsp->scid); 38720a708f8fSGustavo F. Padovan dcid = __le16_to_cpu(rsp->dcid); 38730a708f8fSGustavo F. Padovan result = __le16_to_cpu(rsp->result); 38740a708f8fSGustavo F. Padovan status = __le16_to_cpu(rsp->status); 38750a708f8fSGustavo F. Padovan 38761b009c98SAndrei Emeltchenko BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", 38771b009c98SAndrei Emeltchenko dcid, scid, result, status); 38780a708f8fSGustavo F. Padovan 38793df91ea2SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 38803df91ea2SAndrei Emeltchenko 38810a708f8fSGustavo F. Padovan if (scid) { 38823df91ea2SAndrei Emeltchenko chan = __l2cap_get_chan_by_scid(conn, scid); 38833df91ea2SAndrei Emeltchenko if (!chan) { 38843df91ea2SAndrei Emeltchenko err = -EFAULT; 38853df91ea2SAndrei Emeltchenko goto unlock; 38863df91ea2SAndrei Emeltchenko } 38870a708f8fSGustavo F. Padovan } else { 38883df91ea2SAndrei Emeltchenko chan = __l2cap_get_chan_by_ident(conn, cmd->ident); 38893df91ea2SAndrei Emeltchenko if (!chan) { 38903df91ea2SAndrei Emeltchenko err = -EFAULT; 38913df91ea2SAndrei Emeltchenko goto unlock; 38923df91ea2SAndrei Emeltchenko } 38930a708f8fSGustavo F. Padovan } 38940a708f8fSGustavo F. Padovan 38953df91ea2SAndrei Emeltchenko err = 0; 38963df91ea2SAndrei Emeltchenko 38976be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 389848454079SGustavo F. Padovan 38990a708f8fSGustavo F. Padovan switch (result) { 39000a708f8fSGustavo F. Padovan case L2CAP_CR_SUCCESS: 390189bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONFIG); 3902fc7f8a7eSGustavo F. Padovan chan->ident = 0; 3903fe4128e0SGustavo F. Padovan chan->dcid = dcid; 3904c1360a1cSGustavo F. Padovan clear_bit(CONF_CONNECT_PEND, &chan->conf_state); 39050a708f8fSGustavo F. Padovan 3906c1360a1cSGustavo F. Padovan if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) 39070a708f8fSGustavo F. Padovan break; 39080a708f8fSGustavo F. Padovan 39090a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, 391073ffa904SGustavo F. Padovan l2cap_build_conf_req(chan, req), req); 391173ffa904SGustavo F. Padovan chan->num_conf_req++; 39120a708f8fSGustavo F. Padovan break; 39130a708f8fSGustavo F. Padovan 39140a708f8fSGustavo F. Padovan case L2CAP_CR_PEND: 3915c1360a1cSGustavo F. Padovan set_bit(CONF_CONNECT_PEND, &chan->conf_state); 39160a708f8fSGustavo F. Padovan break; 39170a708f8fSGustavo F. Padovan 39180a708f8fSGustavo F. Padovan default: 391948454079SGustavo F. Padovan l2cap_chan_del(chan, ECONNREFUSED); 39200a708f8fSGustavo F. Padovan break; 39210a708f8fSGustavo F. Padovan } 39220a708f8fSGustavo F. Padovan 39236be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 39243df91ea2SAndrei Emeltchenko 39253df91ea2SAndrei Emeltchenko unlock: 39263df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 39273df91ea2SAndrei Emeltchenko 39283df91ea2SAndrei Emeltchenko return err; 39290a708f8fSGustavo F. Padovan } 39300a708f8fSGustavo F. Padovan 393147d1ec61SGustavo F. Padovan static inline void set_default_fcs(struct l2cap_chan *chan) 39320a708f8fSGustavo F. Padovan { 39330a708f8fSGustavo F. Padovan /* FCS is enabled only in ERTM or streaming mode, if one or both 39340a708f8fSGustavo F. Padovan * sides request it. 39350a708f8fSGustavo F. Padovan */ 39360c1bc5c6SGustavo F. Padovan if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING) 393747d1ec61SGustavo F. Padovan chan->fcs = L2CAP_FCS_NONE; 3938f2592d3eSAndrei Emeltchenko else if (!test_bit(CONF_RECV_NO_FCS, &chan->conf_state)) 393947d1ec61SGustavo F. Padovan chan->fcs = L2CAP_FCS_CRC16; 39400a708f8fSGustavo F. Padovan } 39410a708f8fSGustavo F. Padovan 394229d8a590SAndrei Emeltchenko static void l2cap_send_efs_conf_rsp(struct l2cap_chan *chan, void *data, 394329d8a590SAndrei Emeltchenko u8 ident, u16 flags) 394429d8a590SAndrei Emeltchenko { 394529d8a590SAndrei Emeltchenko struct l2cap_conn *conn = chan->conn; 394629d8a590SAndrei Emeltchenko 394729d8a590SAndrei Emeltchenko BT_DBG("conn %p chan %p ident %d flags 0x%4.4x", conn, chan, ident, 394829d8a590SAndrei Emeltchenko flags); 394929d8a590SAndrei Emeltchenko 395029d8a590SAndrei Emeltchenko clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state); 395129d8a590SAndrei Emeltchenko set_bit(CONF_OUTPUT_DONE, &chan->conf_state); 395229d8a590SAndrei Emeltchenko 395329d8a590SAndrei Emeltchenko l2cap_send_cmd(conn, ident, L2CAP_CONF_RSP, 395429d8a590SAndrei Emeltchenko l2cap_build_conf_rsp(chan, data, 395529d8a590SAndrei Emeltchenko L2CAP_CONF_SUCCESS, flags), data); 395629d8a590SAndrei Emeltchenko } 395729d8a590SAndrei Emeltchenko 39582d792818SGustavo Padovan static inline int l2cap_config_req(struct l2cap_conn *conn, 39592d792818SGustavo Padovan struct l2cap_cmd_hdr *cmd, u16 cmd_len, 39602d792818SGustavo Padovan u8 *data) 39610a708f8fSGustavo F. Padovan { 39620a708f8fSGustavo F. Padovan struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; 39630a708f8fSGustavo F. Padovan u16 dcid, flags; 39640a708f8fSGustavo F. Padovan u8 rsp[64]; 396548454079SGustavo F. Padovan struct l2cap_chan *chan; 39663c588192SMat Martineau int len, err = 0; 39670a708f8fSGustavo F. Padovan 3968cb3b3152SJohan Hedberg if (cmd_len < sizeof(*req)) 3969cb3b3152SJohan Hedberg return -EPROTO; 3970cb3b3152SJohan Hedberg 39710a708f8fSGustavo F. Padovan dcid = __le16_to_cpu(req->dcid); 39720a708f8fSGustavo F. Padovan flags = __le16_to_cpu(req->flags); 39730a708f8fSGustavo F. Padovan 39740a708f8fSGustavo F. Padovan BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); 39750a708f8fSGustavo F. Padovan 3976baa7e1faSGustavo F. Padovan chan = l2cap_get_chan_by_scid(conn, dcid); 397748454079SGustavo F. Padovan if (!chan) 39780a708f8fSGustavo F. Padovan return -ENOENT; 39790a708f8fSGustavo F. Padovan 3980033b1142SDavid S. Miller if (chan->state != BT_CONFIG && chan->state != BT_CONNECT2) { 3981e2fd318eSIlia Kolomisnky struct l2cap_cmd_rej_cid rej; 39820a708f8fSGustavo F. Padovan 3983ac73498cSAndrei Emeltchenko rej.reason = __constant_cpu_to_le16(L2CAP_REJ_INVALID_CID); 3984e2fd318eSIlia Kolomisnky rej.scid = cpu_to_le16(chan->scid); 3985e2fd318eSIlia Kolomisnky rej.dcid = cpu_to_le16(chan->dcid); 3986e2fd318eSIlia Kolomisnky 39870a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ, 39880a708f8fSGustavo F. Padovan sizeof(rej), &rej); 39890a708f8fSGustavo F. Padovan goto unlock; 39900a708f8fSGustavo F. Padovan } 39910a708f8fSGustavo F. Padovan 39920a708f8fSGustavo F. Padovan /* Reject if config buffer is too small. */ 39930a708f8fSGustavo F. Padovan len = cmd_len - sizeof(*req); 3994cb3b3152SJohan Hedberg if (chan->conf_len + len > sizeof(chan->conf_req)) { 39950a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, 3996fe4128e0SGustavo F. Padovan l2cap_build_conf_rsp(chan, rsp, 39970a708f8fSGustavo F. Padovan L2CAP_CONF_REJECT, flags), rsp); 39980a708f8fSGustavo F. Padovan goto unlock; 39990a708f8fSGustavo F. Padovan } 40000a708f8fSGustavo F. Padovan 40010a708f8fSGustavo F. Padovan /* Store config. */ 400273ffa904SGustavo F. Padovan memcpy(chan->conf_req + chan->conf_len, req->data, len); 400373ffa904SGustavo F. Padovan chan->conf_len += len; 40040a708f8fSGustavo F. Padovan 400559e54bd1SAndrei Emeltchenko if (flags & L2CAP_CONF_FLAG_CONTINUATION) { 40060a708f8fSGustavo F. Padovan /* Incomplete config. Send empty response. */ 40070a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, 4008fe4128e0SGustavo F. Padovan l2cap_build_conf_rsp(chan, rsp, 40095325e5bbSAndrei Emeltchenko L2CAP_CONF_SUCCESS, flags), rsp); 40100a708f8fSGustavo F. Padovan goto unlock; 40110a708f8fSGustavo F. Padovan } 40120a708f8fSGustavo F. Padovan 40130a708f8fSGustavo F. Padovan /* Complete config. */ 401473ffa904SGustavo F. Padovan len = l2cap_parse_conf_req(chan, rsp); 40150a708f8fSGustavo F. Padovan if (len < 0) { 40165e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 40170a708f8fSGustavo F. Padovan goto unlock; 40180a708f8fSGustavo F. Padovan } 40190a708f8fSGustavo F. Padovan 40201500109bSMat Martineau chan->ident = cmd->ident; 40210a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); 402273ffa904SGustavo F. Padovan chan->num_conf_rsp++; 40230a708f8fSGustavo F. Padovan 40240a708f8fSGustavo F. Padovan /* Reset config buffer. */ 402573ffa904SGustavo F. Padovan chan->conf_len = 0; 40260a708f8fSGustavo F. Padovan 4027c1360a1cSGustavo F. Padovan if (!test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) 40280a708f8fSGustavo F. Padovan goto unlock; 40290a708f8fSGustavo F. Padovan 4030c1360a1cSGustavo F. Padovan if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) { 403147d1ec61SGustavo F. Padovan set_default_fcs(chan); 40320a708f8fSGustavo F. Padovan 4033105bdf9eSMat Martineau if (chan->mode == L2CAP_MODE_ERTM || 4034105bdf9eSMat Martineau chan->mode == L2CAP_MODE_STREAMING) 40353c588192SMat Martineau err = l2cap_ertm_init(chan); 40360a708f8fSGustavo F. Padovan 40373c588192SMat Martineau if (err < 0) 40385e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, -err); 40393c588192SMat Martineau else 4040cf4cd009SAndrei Emeltchenko l2cap_chan_ready(chan); 40413c588192SMat Martineau 40420a708f8fSGustavo F. Padovan goto unlock; 40430a708f8fSGustavo F. Padovan } 40440a708f8fSGustavo F. Padovan 4045c1360a1cSGustavo F. Padovan if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) { 40460a708f8fSGustavo F. Padovan u8 buf[64]; 40470a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, 404873ffa904SGustavo F. Padovan l2cap_build_conf_req(chan, buf), buf); 404973ffa904SGustavo F. Padovan chan->num_conf_req++; 40500a708f8fSGustavo F. Padovan } 40510a708f8fSGustavo F. Padovan 40520e8b207eSAndrei Emeltchenko /* Got Conf Rsp PENDING from remote side and asume we sent 40530e8b207eSAndrei Emeltchenko Conf Rsp PENDING in the code above */ 40540e8b207eSAndrei Emeltchenko if (test_bit(CONF_REM_CONF_PEND, &chan->conf_state) && 40550e8b207eSAndrei Emeltchenko test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) { 40560e8b207eSAndrei Emeltchenko 40570e8b207eSAndrei Emeltchenko /* check compatibility */ 40580e8b207eSAndrei Emeltchenko 405979de886dSAndrei Emeltchenko /* Send rsp for BR/EDR channel */ 4060f351bc72SAndrei Emeltchenko if (!chan->hs_hcon) 406129d8a590SAndrei Emeltchenko l2cap_send_efs_conf_rsp(chan, rsp, cmd->ident, flags); 406279de886dSAndrei Emeltchenko else 406379de886dSAndrei Emeltchenko chan->ident = cmd->ident; 40640e8b207eSAndrei Emeltchenko } 40650e8b207eSAndrei Emeltchenko 40660a708f8fSGustavo F. Padovan unlock: 40676be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 40683c588192SMat Martineau return err; 40690a708f8fSGustavo F. Padovan } 40700a708f8fSGustavo F. Padovan 40712d792818SGustavo Padovan static inline int l2cap_config_rsp(struct l2cap_conn *conn, 4072cb3b3152SJohan Hedberg struct l2cap_cmd_hdr *cmd, u16 cmd_len, 4073cb3b3152SJohan Hedberg u8 *data) 40740a708f8fSGustavo F. Padovan { 40750a708f8fSGustavo F. Padovan struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; 40760a708f8fSGustavo F. Padovan u16 scid, flags, result; 407748454079SGustavo F. Padovan struct l2cap_chan *chan; 4078cb3b3152SJohan Hedberg int len = cmd_len - sizeof(*rsp); 40793c588192SMat Martineau int err = 0; 40800a708f8fSGustavo F. Padovan 4081cb3b3152SJohan Hedberg if (cmd_len < sizeof(*rsp)) 4082cb3b3152SJohan Hedberg return -EPROTO; 4083cb3b3152SJohan Hedberg 40840a708f8fSGustavo F. Padovan scid = __le16_to_cpu(rsp->scid); 40850a708f8fSGustavo F. Padovan flags = __le16_to_cpu(rsp->flags); 40860a708f8fSGustavo F. Padovan result = __le16_to_cpu(rsp->result); 40870a708f8fSGustavo F. Padovan 408861386cbaSAndrei Emeltchenko BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x len %d", scid, flags, 408961386cbaSAndrei Emeltchenko result, len); 40900a708f8fSGustavo F. Padovan 4091baa7e1faSGustavo F. Padovan chan = l2cap_get_chan_by_scid(conn, scid); 409248454079SGustavo F. Padovan if (!chan) 40930a708f8fSGustavo F. Padovan return 0; 40940a708f8fSGustavo F. Padovan 40950a708f8fSGustavo F. Padovan switch (result) { 40960a708f8fSGustavo F. Padovan case L2CAP_CONF_SUCCESS: 409747d1ec61SGustavo F. Padovan l2cap_conf_rfc_get(chan, rsp->data, len); 40980e8b207eSAndrei Emeltchenko clear_bit(CONF_REM_CONF_PEND, &chan->conf_state); 40990a708f8fSGustavo F. Padovan break; 41000a708f8fSGustavo F. Padovan 41010e8b207eSAndrei Emeltchenko case L2CAP_CONF_PENDING: 41020e8b207eSAndrei Emeltchenko set_bit(CONF_REM_CONF_PEND, &chan->conf_state); 41030e8b207eSAndrei Emeltchenko 41040e8b207eSAndrei Emeltchenko if (test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) { 41050e8b207eSAndrei Emeltchenko char buf[64]; 41060e8b207eSAndrei Emeltchenko 41070e8b207eSAndrei Emeltchenko len = l2cap_parse_conf_rsp(chan, rsp->data, len, 41080e8b207eSAndrei Emeltchenko buf, &result); 41090e8b207eSAndrei Emeltchenko if (len < 0) { 41105e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 41110e8b207eSAndrei Emeltchenko goto done; 41120e8b207eSAndrei Emeltchenko } 41130e8b207eSAndrei Emeltchenko 4114f351bc72SAndrei Emeltchenko if (!chan->hs_hcon) { 411579de886dSAndrei Emeltchenko l2cap_send_efs_conf_rsp(chan, buf, cmd->ident, 411679de886dSAndrei Emeltchenko 0); 41175ce66b59SAndrei Emeltchenko } else { 41185ce66b59SAndrei Emeltchenko if (l2cap_check_efs(chan)) { 41195ce66b59SAndrei Emeltchenko amp_create_logical_link(chan); 412079de886dSAndrei Emeltchenko chan->ident = cmd->ident; 41210e8b207eSAndrei Emeltchenko } 41225ce66b59SAndrei Emeltchenko } 41235ce66b59SAndrei Emeltchenko } 41240e8b207eSAndrei Emeltchenko goto done; 41250e8b207eSAndrei Emeltchenko 41260a708f8fSGustavo F. Padovan case L2CAP_CONF_UNACCEPT: 412773ffa904SGustavo F. Padovan if (chan->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { 41280a708f8fSGustavo F. Padovan char req[64]; 41290a708f8fSGustavo F. Padovan 41300a708f8fSGustavo F. Padovan if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { 41315e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 41320a708f8fSGustavo F. Padovan goto done; 41330a708f8fSGustavo F. Padovan } 41340a708f8fSGustavo F. Padovan 41350a708f8fSGustavo F. Padovan /* throw out any old stored conf requests */ 41360a708f8fSGustavo F. Padovan result = L2CAP_CONF_SUCCESS; 4137b4450035SGustavo F. Padovan len = l2cap_parse_conf_rsp(chan, rsp->data, len, 4138b4450035SGustavo F. Padovan req, &result); 41390a708f8fSGustavo F. Padovan if (len < 0) { 41405e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 41410a708f8fSGustavo F. Padovan goto done; 41420a708f8fSGustavo F. Padovan } 41430a708f8fSGustavo F. Padovan 41440a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), 41450a708f8fSGustavo F. Padovan L2CAP_CONF_REQ, len, req); 414673ffa904SGustavo F. Padovan chan->num_conf_req++; 41470a708f8fSGustavo F. Padovan if (result != L2CAP_CONF_SUCCESS) 41480a708f8fSGustavo F. Padovan goto done; 41490a708f8fSGustavo F. Padovan break; 41500a708f8fSGustavo F. Padovan } 41510a708f8fSGustavo F. Padovan 41520a708f8fSGustavo F. Padovan default: 41536be36555SAndrei Emeltchenko l2cap_chan_set_err(chan, ECONNRESET); 41542e0052e4SAndrei Emeltchenko 4155ba13ccd9SMarcel Holtmann __set_chan_timer(chan, L2CAP_DISC_REJ_TIMEOUT); 41565e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 41570a708f8fSGustavo F. Padovan goto done; 41580a708f8fSGustavo F. Padovan } 41590a708f8fSGustavo F. Padovan 416059e54bd1SAndrei Emeltchenko if (flags & L2CAP_CONF_FLAG_CONTINUATION) 41610a708f8fSGustavo F. Padovan goto done; 41620a708f8fSGustavo F. Padovan 4163c1360a1cSGustavo F. Padovan set_bit(CONF_INPUT_DONE, &chan->conf_state); 41640a708f8fSGustavo F. Padovan 4165c1360a1cSGustavo F. Padovan if (test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) { 416647d1ec61SGustavo F. Padovan set_default_fcs(chan); 41670a708f8fSGustavo F. Padovan 4168105bdf9eSMat Martineau if (chan->mode == L2CAP_MODE_ERTM || 4169105bdf9eSMat Martineau chan->mode == L2CAP_MODE_STREAMING) 41703c588192SMat Martineau err = l2cap_ertm_init(chan); 41710a708f8fSGustavo F. Padovan 41723c588192SMat Martineau if (err < 0) 41735e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, -err); 41743c588192SMat Martineau else 4175cf4cd009SAndrei Emeltchenko l2cap_chan_ready(chan); 41760a708f8fSGustavo F. Padovan } 41770a708f8fSGustavo F. Padovan 41780a708f8fSGustavo F. Padovan done: 41796be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 41803c588192SMat Martineau return err; 41810a708f8fSGustavo F. Padovan } 41820a708f8fSGustavo F. Padovan 41832d792818SGustavo Padovan static inline int l2cap_disconnect_req(struct l2cap_conn *conn, 4184cb3b3152SJohan Hedberg struct l2cap_cmd_hdr *cmd, u16 cmd_len, 4185cb3b3152SJohan Hedberg u8 *data) 41860a708f8fSGustavo F. Padovan { 41870a708f8fSGustavo F. Padovan struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; 41880a708f8fSGustavo F. Padovan struct l2cap_disconn_rsp rsp; 41890a708f8fSGustavo F. Padovan u16 dcid, scid; 419048454079SGustavo F. Padovan struct l2cap_chan *chan; 41910a708f8fSGustavo F. Padovan struct sock *sk; 41920a708f8fSGustavo F. Padovan 4193cb3b3152SJohan Hedberg if (cmd_len != sizeof(*req)) 4194cb3b3152SJohan Hedberg return -EPROTO; 4195cb3b3152SJohan Hedberg 41960a708f8fSGustavo F. Padovan scid = __le16_to_cpu(req->scid); 41970a708f8fSGustavo F. Padovan dcid = __le16_to_cpu(req->dcid); 41980a708f8fSGustavo F. Padovan 41990a708f8fSGustavo F. Padovan BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); 42000a708f8fSGustavo F. Padovan 42013df91ea2SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 42023df91ea2SAndrei Emeltchenko 42033df91ea2SAndrei Emeltchenko chan = __l2cap_get_chan_by_scid(conn, dcid); 42043df91ea2SAndrei Emeltchenko if (!chan) { 42053df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 42060a708f8fSGustavo F. Padovan return 0; 42073df91ea2SAndrei Emeltchenko } 42080a708f8fSGustavo F. Padovan 42096be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 42106be36555SAndrei Emeltchenko 421148454079SGustavo F. Padovan sk = chan->sk; 421248454079SGustavo F. Padovan 4213fe4128e0SGustavo F. Padovan rsp.dcid = cpu_to_le16(chan->scid); 4214fe4128e0SGustavo F. Padovan rsp.scid = cpu_to_le16(chan->dcid); 42150a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); 42160a708f8fSGustavo F. Padovan 42176be36555SAndrei Emeltchenko lock_sock(sk); 42180a708f8fSGustavo F. Padovan sk->sk_shutdown = SHUTDOWN_MASK; 42196be36555SAndrei Emeltchenko release_sock(sk); 42200a708f8fSGustavo F. Padovan 422161d6ef3eSMat Martineau l2cap_chan_hold(chan); 422248454079SGustavo F. Padovan l2cap_chan_del(chan, ECONNRESET); 42236be36555SAndrei Emeltchenko 42246be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 42250a708f8fSGustavo F. Padovan 422680b98027SGustavo Padovan chan->ops->close(chan); 422761d6ef3eSMat Martineau l2cap_chan_put(chan); 42283df91ea2SAndrei Emeltchenko 42293df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 42303df91ea2SAndrei Emeltchenko 42310a708f8fSGustavo F. Padovan return 0; 42320a708f8fSGustavo F. Padovan } 42330a708f8fSGustavo F. Padovan 42342d792818SGustavo Padovan static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, 4235cb3b3152SJohan Hedberg struct l2cap_cmd_hdr *cmd, u16 cmd_len, 4236cb3b3152SJohan Hedberg u8 *data) 42370a708f8fSGustavo F. Padovan { 42380a708f8fSGustavo F. Padovan struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; 42390a708f8fSGustavo F. Padovan u16 dcid, scid; 424048454079SGustavo F. Padovan struct l2cap_chan *chan; 42410a708f8fSGustavo F. Padovan 4242cb3b3152SJohan Hedberg if (cmd_len != sizeof(*rsp)) 4243cb3b3152SJohan Hedberg return -EPROTO; 4244cb3b3152SJohan Hedberg 42450a708f8fSGustavo F. Padovan scid = __le16_to_cpu(rsp->scid); 42460a708f8fSGustavo F. Padovan dcid = __le16_to_cpu(rsp->dcid); 42470a708f8fSGustavo F. Padovan 42480a708f8fSGustavo F. Padovan BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); 42490a708f8fSGustavo F. Padovan 42503df91ea2SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 42513df91ea2SAndrei Emeltchenko 42523df91ea2SAndrei Emeltchenko chan = __l2cap_get_chan_by_scid(conn, scid); 42533df91ea2SAndrei Emeltchenko if (!chan) { 42543df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 42550a708f8fSGustavo F. Padovan return 0; 42563df91ea2SAndrei Emeltchenko } 42570a708f8fSGustavo F. Padovan 42586be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 425948454079SGustavo F. Padovan 426061d6ef3eSMat Martineau l2cap_chan_hold(chan); 426148454079SGustavo F. Padovan l2cap_chan_del(chan, 0); 42626be36555SAndrei Emeltchenko 42636be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 42640a708f8fSGustavo F. Padovan 426580b98027SGustavo Padovan chan->ops->close(chan); 426661d6ef3eSMat Martineau l2cap_chan_put(chan); 42673df91ea2SAndrei Emeltchenko 42683df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 42693df91ea2SAndrei Emeltchenko 42700a708f8fSGustavo F. Padovan return 0; 42710a708f8fSGustavo F. Padovan } 42720a708f8fSGustavo F. Padovan 42732d792818SGustavo Padovan static inline int l2cap_information_req(struct l2cap_conn *conn, 4274cb3b3152SJohan Hedberg struct l2cap_cmd_hdr *cmd, u16 cmd_len, 4275cb3b3152SJohan Hedberg u8 *data) 42760a708f8fSGustavo F. Padovan { 42770a708f8fSGustavo F. Padovan struct l2cap_info_req *req = (struct l2cap_info_req *) data; 42780a708f8fSGustavo F. Padovan u16 type; 42790a708f8fSGustavo F. Padovan 4280cb3b3152SJohan Hedberg if (cmd_len != sizeof(*req)) 4281cb3b3152SJohan Hedberg return -EPROTO; 4282cb3b3152SJohan Hedberg 42830a708f8fSGustavo F. Padovan type = __le16_to_cpu(req->type); 42840a708f8fSGustavo F. Padovan 42850a708f8fSGustavo F. Padovan BT_DBG("type 0x%4.4x", type); 42860a708f8fSGustavo F. Padovan 42870a708f8fSGustavo F. Padovan if (type == L2CAP_IT_FEAT_MASK) { 42880a708f8fSGustavo F. Padovan u8 buf[8]; 42890a708f8fSGustavo F. Padovan u32 feat_mask = l2cap_feat_mask; 42900a708f8fSGustavo F. Padovan struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; 4291ac73498cSAndrei Emeltchenko rsp->type = __constant_cpu_to_le16(L2CAP_IT_FEAT_MASK); 4292ac73498cSAndrei Emeltchenko rsp->result = __constant_cpu_to_le16(L2CAP_IR_SUCCESS); 42930a708f8fSGustavo F. Padovan if (!disable_ertm) 42940a708f8fSGustavo F. Padovan feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING 42950a708f8fSGustavo F. Padovan | L2CAP_FEAT_FCS; 4296a5fd6f30SAndrei Emeltchenko if (enable_hs) 42976327eb98SAndrei Emeltchenko feat_mask |= L2CAP_FEAT_EXT_FLOW 42986327eb98SAndrei Emeltchenko | L2CAP_FEAT_EXT_WINDOW; 4299a5fd6f30SAndrei Emeltchenko 43000a708f8fSGustavo F. Padovan put_unaligned_le32(feat_mask, rsp->data); 43012d792818SGustavo Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_INFO_RSP, sizeof(buf), 43022d792818SGustavo Padovan buf); 43030a708f8fSGustavo F. Padovan } else if (type == L2CAP_IT_FIXED_CHAN) { 43040a708f8fSGustavo F. Padovan u8 buf[12]; 43050a708f8fSGustavo F. Padovan struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; 430650a147cdSMat Martineau 430750a147cdSMat Martineau if (enable_hs) 430850a147cdSMat Martineau l2cap_fixed_chan[0] |= L2CAP_FC_A2MP; 430950a147cdSMat Martineau else 431050a147cdSMat Martineau l2cap_fixed_chan[0] &= ~L2CAP_FC_A2MP; 431150a147cdSMat Martineau 4312ac73498cSAndrei Emeltchenko rsp->type = __constant_cpu_to_le16(L2CAP_IT_FIXED_CHAN); 4313ac73498cSAndrei Emeltchenko rsp->result = __constant_cpu_to_le16(L2CAP_IR_SUCCESS); 4314c6337ea6SAndrei Emeltchenko memcpy(rsp->data, l2cap_fixed_chan, sizeof(l2cap_fixed_chan)); 43152d792818SGustavo Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_INFO_RSP, sizeof(buf), 43162d792818SGustavo Padovan buf); 43170a708f8fSGustavo F. Padovan } else { 43180a708f8fSGustavo F. Padovan struct l2cap_info_rsp rsp; 43190a708f8fSGustavo F. Padovan rsp.type = cpu_to_le16(type); 4320ac73498cSAndrei Emeltchenko rsp.result = __constant_cpu_to_le16(L2CAP_IR_NOTSUPP); 43212d792818SGustavo Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_INFO_RSP, sizeof(rsp), 43222d792818SGustavo Padovan &rsp); 43230a708f8fSGustavo F. Padovan } 43240a708f8fSGustavo F. Padovan 43250a708f8fSGustavo F. Padovan return 0; 43260a708f8fSGustavo F. Padovan } 43270a708f8fSGustavo F. Padovan 43282d792818SGustavo Padovan static inline int l2cap_information_rsp(struct l2cap_conn *conn, 4329cb3b3152SJohan Hedberg struct l2cap_cmd_hdr *cmd, u16 cmd_len, 4330cb3b3152SJohan Hedberg u8 *data) 43310a708f8fSGustavo F. Padovan { 43320a708f8fSGustavo F. Padovan struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; 43330a708f8fSGustavo F. Padovan u16 type, result; 43340a708f8fSGustavo F. Padovan 4335cb3b3152SJohan Hedberg if (cmd_len != sizeof(*rsp)) 4336cb3b3152SJohan Hedberg return -EPROTO; 4337cb3b3152SJohan Hedberg 43380a708f8fSGustavo F. Padovan type = __le16_to_cpu(rsp->type); 43390a708f8fSGustavo F. Padovan result = __le16_to_cpu(rsp->result); 43400a708f8fSGustavo F. Padovan 43410a708f8fSGustavo F. Padovan BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); 43420a708f8fSGustavo F. Padovan 4343e90165beSAndrei Emeltchenko /* L2CAP Info req/rsp are unbound to channels, add extra checks */ 4344e90165beSAndrei Emeltchenko if (cmd->ident != conn->info_ident || 4345e90165beSAndrei Emeltchenko conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) 4346e90165beSAndrei Emeltchenko return 0; 4347e90165beSAndrei Emeltchenko 434817cd3f37SUlisses Furquim cancel_delayed_work(&conn->info_timer); 43490a708f8fSGustavo F. Padovan 43500a708f8fSGustavo F. Padovan if (result != L2CAP_IR_SUCCESS) { 43510a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; 43520a708f8fSGustavo F. Padovan conn->info_ident = 0; 43530a708f8fSGustavo F. Padovan 43540a708f8fSGustavo F. Padovan l2cap_conn_start(conn); 43550a708f8fSGustavo F. Padovan 43560a708f8fSGustavo F. Padovan return 0; 43570a708f8fSGustavo F. Padovan } 43580a708f8fSGustavo F. Padovan 4359978c93b9SAndrei Emeltchenko switch (type) { 4360978c93b9SAndrei Emeltchenko case L2CAP_IT_FEAT_MASK: 43610a708f8fSGustavo F. Padovan conn->feat_mask = get_unaligned_le32(rsp->data); 43620a708f8fSGustavo F. Padovan 43630a708f8fSGustavo F. Padovan if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { 43640a708f8fSGustavo F. Padovan struct l2cap_info_req req; 4365ac73498cSAndrei Emeltchenko req.type = __constant_cpu_to_le16(L2CAP_IT_FIXED_CHAN); 43660a708f8fSGustavo F. Padovan 43670a708f8fSGustavo F. Padovan conn->info_ident = l2cap_get_ident(conn); 43680a708f8fSGustavo F. Padovan 43690a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, conn->info_ident, 43700a708f8fSGustavo F. Padovan L2CAP_INFO_REQ, sizeof(req), &req); 43710a708f8fSGustavo F. Padovan } else { 43720a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; 43730a708f8fSGustavo F. Padovan conn->info_ident = 0; 43740a708f8fSGustavo F. Padovan 43750a708f8fSGustavo F. Padovan l2cap_conn_start(conn); 43760a708f8fSGustavo F. Padovan } 4377978c93b9SAndrei Emeltchenko break; 4378978c93b9SAndrei Emeltchenko 4379978c93b9SAndrei Emeltchenko case L2CAP_IT_FIXED_CHAN: 4380978c93b9SAndrei Emeltchenko conn->fixed_chan_mask = rsp->data[0]; 43810a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; 43820a708f8fSGustavo F. Padovan conn->info_ident = 0; 43830a708f8fSGustavo F. Padovan 43840a708f8fSGustavo F. Padovan l2cap_conn_start(conn); 4385978c93b9SAndrei Emeltchenko break; 43860a708f8fSGustavo F. Padovan } 43870a708f8fSGustavo F. Padovan 43880a708f8fSGustavo F. Padovan return 0; 43890a708f8fSGustavo F. Padovan } 43900a708f8fSGustavo F. Padovan 43911700915fSMat Martineau static int l2cap_create_channel_req(struct l2cap_conn *conn, 43922d792818SGustavo Padovan struct l2cap_cmd_hdr *cmd, 43932d792818SGustavo Padovan u16 cmd_len, void *data) 4394f94ff6ffSMat Martineau { 4395f94ff6ffSMat Martineau struct l2cap_create_chan_req *req = data; 43966e1df6a6SAndrei Emeltchenko struct l2cap_create_chan_rsp rsp; 43971700915fSMat Martineau struct l2cap_chan *chan; 43986e1df6a6SAndrei Emeltchenko struct hci_dev *hdev; 4399f94ff6ffSMat Martineau u16 psm, scid; 4400f94ff6ffSMat Martineau 4401f94ff6ffSMat Martineau if (cmd_len != sizeof(*req)) 4402f94ff6ffSMat Martineau return -EPROTO; 4403f94ff6ffSMat Martineau 4404f94ff6ffSMat Martineau if (!enable_hs) 4405f94ff6ffSMat Martineau return -EINVAL; 4406f94ff6ffSMat Martineau 4407f94ff6ffSMat Martineau psm = le16_to_cpu(req->psm); 4408f94ff6ffSMat Martineau scid = le16_to_cpu(req->scid); 4409f94ff6ffSMat Martineau 4410ad0ac6caSAndrei Emeltchenko BT_DBG("psm 0x%2.2x, scid 0x%4.4x, amp_id %d", psm, scid, req->amp_id); 4411f94ff6ffSMat Martineau 44126e1df6a6SAndrei Emeltchenko /* For controller id 0 make BR/EDR connection */ 44136e1df6a6SAndrei Emeltchenko if (req->amp_id == HCI_BREDR_ID) { 44146e1df6a6SAndrei Emeltchenko l2cap_connect(conn, cmd, data, L2CAP_CREATE_CHAN_RSP, 44156e1df6a6SAndrei Emeltchenko req->amp_id); 44166e1df6a6SAndrei Emeltchenko return 0; 44176e1df6a6SAndrei Emeltchenko } 44181700915fSMat Martineau 44191700915fSMat Martineau /* Validate AMP controller id */ 44201700915fSMat Martineau hdev = hci_dev_get(req->amp_id); 44216e1df6a6SAndrei Emeltchenko if (!hdev) 44226e1df6a6SAndrei Emeltchenko goto error; 44231700915fSMat Martineau 44246e1df6a6SAndrei Emeltchenko if (hdev->dev_type != HCI_AMP || !test_bit(HCI_UP, &hdev->flags)) { 44256e1df6a6SAndrei Emeltchenko hci_dev_put(hdev); 44266e1df6a6SAndrei Emeltchenko goto error; 44276e1df6a6SAndrei Emeltchenko } 44286e1df6a6SAndrei Emeltchenko 44296e1df6a6SAndrei Emeltchenko chan = l2cap_connect(conn, cmd, data, L2CAP_CREATE_CHAN_RSP, 44306e1df6a6SAndrei Emeltchenko req->amp_id); 44316e1df6a6SAndrei Emeltchenko if (chan) { 44326e1df6a6SAndrei Emeltchenko struct amp_mgr *mgr = conn->hcon->amp_mgr; 44336e1df6a6SAndrei Emeltchenko struct hci_conn *hs_hcon; 44346e1df6a6SAndrei Emeltchenko 44356e1df6a6SAndrei Emeltchenko hs_hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK, conn->dst); 44366e1df6a6SAndrei Emeltchenko if (!hs_hcon) { 44376e1df6a6SAndrei Emeltchenko hci_dev_put(hdev); 44386e1df6a6SAndrei Emeltchenko return -EFAULT; 44396e1df6a6SAndrei Emeltchenko } 44406e1df6a6SAndrei Emeltchenko 44416e1df6a6SAndrei Emeltchenko BT_DBG("mgr %p bredr_chan %p hs_hcon %p", mgr, chan, hs_hcon); 44426e1df6a6SAndrei Emeltchenko 44436e1df6a6SAndrei Emeltchenko mgr->bredr_chan = chan; 44446e1df6a6SAndrei Emeltchenko chan->hs_hcon = hs_hcon; 4445fd45bf4cSAndrei Emeltchenko chan->fcs = L2CAP_FCS_NONE; 44466e1df6a6SAndrei Emeltchenko conn->mtu = hdev->block_mtu; 44476e1df6a6SAndrei Emeltchenko } 44486e1df6a6SAndrei Emeltchenko 44496e1df6a6SAndrei Emeltchenko hci_dev_put(hdev); 44506e1df6a6SAndrei Emeltchenko 44516e1df6a6SAndrei Emeltchenko return 0; 44526e1df6a6SAndrei Emeltchenko 44536e1df6a6SAndrei Emeltchenko error: 4454f94ff6ffSMat Martineau rsp.dcid = 0; 4455f94ff6ffSMat Martineau rsp.scid = cpu_to_le16(scid); 44561700915fSMat Martineau rsp.result = __constant_cpu_to_le16(L2CAP_CR_BAD_AMP); 44578ce0c498SAndrei Emeltchenko rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO); 4458f94ff6ffSMat Martineau 4459f94ff6ffSMat Martineau l2cap_send_cmd(conn, cmd->ident, L2CAP_CREATE_CHAN_RSP, 4460f94ff6ffSMat Martineau sizeof(rsp), &rsp); 4461f94ff6ffSMat Martineau 44626e1df6a6SAndrei Emeltchenko return -EFAULT; 4463f94ff6ffSMat Martineau } 4464f94ff6ffSMat Martineau 44658eb200bdSMat Martineau static void l2cap_send_move_chan_req(struct l2cap_chan *chan, u8 dest_amp_id) 44668eb200bdSMat Martineau { 44678eb200bdSMat Martineau struct l2cap_move_chan_req req; 44688eb200bdSMat Martineau u8 ident; 44698eb200bdSMat Martineau 44708eb200bdSMat Martineau BT_DBG("chan %p, dest_amp_id %d", chan, dest_amp_id); 44718eb200bdSMat Martineau 44728eb200bdSMat Martineau ident = l2cap_get_ident(chan->conn); 44738eb200bdSMat Martineau chan->ident = ident; 44748eb200bdSMat Martineau 44758eb200bdSMat Martineau req.icid = cpu_to_le16(chan->scid); 44768eb200bdSMat Martineau req.dest_amp_id = dest_amp_id; 44778eb200bdSMat Martineau 44788eb200bdSMat Martineau l2cap_send_cmd(chan->conn, ident, L2CAP_MOVE_CHAN_REQ, sizeof(req), 44798eb200bdSMat Martineau &req); 44808eb200bdSMat Martineau 44818eb200bdSMat Martineau __set_chan_timer(chan, L2CAP_MOVE_TIMEOUT); 44828eb200bdSMat Martineau } 44838eb200bdSMat Martineau 44841500109bSMat Martineau static void l2cap_send_move_chan_rsp(struct l2cap_chan *chan, u16 result) 44858d5a04a1SMat Martineau { 44868d5a04a1SMat Martineau struct l2cap_move_chan_rsp rsp; 44878d5a04a1SMat Martineau 44881500109bSMat Martineau BT_DBG("chan %p, result 0x%4.4x", chan, result); 44898d5a04a1SMat Martineau 44901500109bSMat Martineau rsp.icid = cpu_to_le16(chan->dcid); 44918d5a04a1SMat Martineau rsp.result = cpu_to_le16(result); 44928d5a04a1SMat Martineau 44931500109bSMat Martineau l2cap_send_cmd(chan->conn, chan->ident, L2CAP_MOVE_CHAN_RSP, 44941500109bSMat Martineau sizeof(rsp), &rsp); 44958d5a04a1SMat Martineau } 44968d5a04a1SMat Martineau 44975b155ef9SMat Martineau static void l2cap_send_move_chan_cfm(struct l2cap_chan *chan, u16 result) 44988d5a04a1SMat Martineau { 44998d5a04a1SMat Martineau struct l2cap_move_chan_cfm cfm; 45008d5a04a1SMat Martineau 45015b155ef9SMat Martineau BT_DBG("chan %p, result 0x%4.4x", chan, result); 45028d5a04a1SMat Martineau 45035b155ef9SMat Martineau chan->ident = l2cap_get_ident(chan->conn); 45048d5a04a1SMat Martineau 45055b155ef9SMat Martineau cfm.icid = cpu_to_le16(chan->scid); 45068d5a04a1SMat Martineau cfm.result = cpu_to_le16(result); 45078d5a04a1SMat Martineau 45085b155ef9SMat Martineau l2cap_send_cmd(chan->conn, chan->ident, L2CAP_MOVE_CHAN_CFM, 45095b155ef9SMat Martineau sizeof(cfm), &cfm); 45105b155ef9SMat Martineau 45115b155ef9SMat Martineau __set_chan_timer(chan, L2CAP_MOVE_TIMEOUT); 45125b155ef9SMat Martineau } 45135b155ef9SMat Martineau 45145b155ef9SMat Martineau static void l2cap_send_move_chan_cfm_icid(struct l2cap_conn *conn, u16 icid) 45155b155ef9SMat Martineau { 45165b155ef9SMat Martineau struct l2cap_move_chan_cfm cfm; 45175b155ef9SMat Martineau 45185b155ef9SMat Martineau BT_DBG("conn %p, icid 0x%4.4x", conn, icid); 45195b155ef9SMat Martineau 45205b155ef9SMat Martineau cfm.icid = cpu_to_le16(icid); 45215b155ef9SMat Martineau cfm.result = __constant_cpu_to_le16(L2CAP_MC_UNCONFIRMED); 45225b155ef9SMat Martineau 45235b155ef9SMat Martineau l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_MOVE_CHAN_CFM, 45245b155ef9SMat Martineau sizeof(cfm), &cfm); 45258d5a04a1SMat Martineau } 45268d5a04a1SMat Martineau 45278d5a04a1SMat Martineau static void l2cap_send_move_chan_cfm_rsp(struct l2cap_conn *conn, u8 ident, 45288d5a04a1SMat Martineau u16 icid) 45298d5a04a1SMat Martineau { 45308d5a04a1SMat Martineau struct l2cap_move_chan_cfm_rsp rsp; 45318d5a04a1SMat Martineau 4532ad0ac6caSAndrei Emeltchenko BT_DBG("icid 0x%4.4x", icid); 45338d5a04a1SMat Martineau 45348d5a04a1SMat Martineau rsp.icid = cpu_to_le16(icid); 45358d5a04a1SMat Martineau l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM_RSP, sizeof(rsp), &rsp); 45368d5a04a1SMat Martineau } 45378d5a04a1SMat Martineau 45385f3847a4SMat Martineau static void __release_logical_link(struct l2cap_chan *chan) 45395f3847a4SMat Martineau { 45405f3847a4SMat Martineau chan->hs_hchan = NULL; 45415f3847a4SMat Martineau chan->hs_hcon = NULL; 45425f3847a4SMat Martineau 45435f3847a4SMat Martineau /* Placeholder - release the logical link */ 45445f3847a4SMat Martineau } 45455f3847a4SMat Martineau 45461500109bSMat Martineau static void l2cap_logical_fail(struct l2cap_chan *chan) 45471500109bSMat Martineau { 45481500109bSMat Martineau /* Logical link setup failed */ 45491500109bSMat Martineau if (chan->state != BT_CONNECTED) { 45501500109bSMat Martineau /* Create channel failure, disconnect */ 45515e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 45521500109bSMat Martineau return; 45531500109bSMat Martineau } 45541500109bSMat Martineau 45551500109bSMat Martineau switch (chan->move_role) { 45561500109bSMat Martineau case L2CAP_MOVE_ROLE_RESPONDER: 45571500109bSMat Martineau l2cap_move_done(chan); 45581500109bSMat Martineau l2cap_send_move_chan_rsp(chan, L2CAP_MR_NOT_SUPP); 45591500109bSMat Martineau break; 45601500109bSMat Martineau case L2CAP_MOVE_ROLE_INITIATOR: 45611500109bSMat Martineau if (chan->move_state == L2CAP_MOVE_WAIT_LOGICAL_COMP || 45621500109bSMat Martineau chan->move_state == L2CAP_MOVE_WAIT_LOGICAL_CFM) { 45631500109bSMat Martineau /* Remote has only sent pending or 45641500109bSMat Martineau * success responses, clean up 45651500109bSMat Martineau */ 45661500109bSMat Martineau l2cap_move_done(chan); 45671500109bSMat Martineau } 45681500109bSMat Martineau 45691500109bSMat Martineau /* Other amp move states imply that the move 45701500109bSMat Martineau * has already aborted 45711500109bSMat Martineau */ 45721500109bSMat Martineau l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED); 45731500109bSMat Martineau break; 45741500109bSMat Martineau } 45751500109bSMat Martineau } 45761500109bSMat Martineau 45771500109bSMat Martineau static void l2cap_logical_finish_create(struct l2cap_chan *chan, 45781500109bSMat Martineau struct hci_chan *hchan) 45791500109bSMat Martineau { 45801500109bSMat Martineau struct l2cap_conf_rsp rsp; 45811500109bSMat Martineau 4582336178a3SAndrei Emeltchenko chan->hs_hchan = hchan; 45831500109bSMat Martineau chan->hs_hcon->l2cap_data = chan->conn; 45841500109bSMat Martineau 458535ba9561SAndrei Emeltchenko l2cap_send_efs_conf_rsp(chan, &rsp, chan->ident, 0); 45861500109bSMat Martineau 45871500109bSMat Martineau if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) { 4588fe79c6feSAndrei Emeltchenko int err; 45891500109bSMat Martineau 45901500109bSMat Martineau set_default_fcs(chan); 45911500109bSMat Martineau 45921500109bSMat Martineau err = l2cap_ertm_init(chan); 45931500109bSMat Martineau if (err < 0) 45945e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, -err); 45951500109bSMat Martineau else 45961500109bSMat Martineau l2cap_chan_ready(chan); 45971500109bSMat Martineau } 45981500109bSMat Martineau } 45991500109bSMat Martineau 46001500109bSMat Martineau static void l2cap_logical_finish_move(struct l2cap_chan *chan, 46011500109bSMat Martineau struct hci_chan *hchan) 46021500109bSMat Martineau { 46031500109bSMat Martineau chan->hs_hcon = hchan->conn; 46041500109bSMat Martineau chan->hs_hcon->l2cap_data = chan->conn; 46051500109bSMat Martineau 46061500109bSMat Martineau BT_DBG("move_state %d", chan->move_state); 46071500109bSMat Martineau 46081500109bSMat Martineau switch (chan->move_state) { 46091500109bSMat Martineau case L2CAP_MOVE_WAIT_LOGICAL_COMP: 46101500109bSMat Martineau /* Move confirm will be sent after a success 46111500109bSMat Martineau * response is received 46121500109bSMat Martineau */ 46131500109bSMat Martineau chan->move_state = L2CAP_MOVE_WAIT_RSP_SUCCESS; 46141500109bSMat Martineau break; 46151500109bSMat Martineau case L2CAP_MOVE_WAIT_LOGICAL_CFM: 46161500109bSMat Martineau if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { 46171500109bSMat Martineau chan->move_state = L2CAP_MOVE_WAIT_LOCAL_BUSY; 46181500109bSMat Martineau } else if (chan->move_role == L2CAP_MOVE_ROLE_INITIATOR) { 46191500109bSMat Martineau chan->move_state = L2CAP_MOVE_WAIT_CONFIRM_RSP; 46201500109bSMat Martineau l2cap_send_move_chan_cfm(chan, L2CAP_MC_CONFIRMED); 46211500109bSMat Martineau } else if (chan->move_role == L2CAP_MOVE_ROLE_RESPONDER) { 46221500109bSMat Martineau chan->move_state = L2CAP_MOVE_WAIT_CONFIRM; 46231500109bSMat Martineau l2cap_send_move_chan_rsp(chan, L2CAP_MR_SUCCESS); 46241500109bSMat Martineau } 46251500109bSMat Martineau break; 46261500109bSMat Martineau default: 46271500109bSMat Martineau /* Move was not in expected state, free the channel */ 46281500109bSMat Martineau __release_logical_link(chan); 46291500109bSMat Martineau 46301500109bSMat Martineau chan->move_state = L2CAP_MOVE_STABLE; 46311500109bSMat Martineau } 46321500109bSMat Martineau } 46331500109bSMat Martineau 46341500109bSMat Martineau /* Call with chan locked */ 463527695fb4SAndrei Emeltchenko void l2cap_logical_cfm(struct l2cap_chan *chan, struct hci_chan *hchan, 46365b155ef9SMat Martineau u8 status) 46375b155ef9SMat Martineau { 46381500109bSMat Martineau BT_DBG("chan %p, hchan %p, status %d", chan, hchan, status); 46391500109bSMat Martineau 46401500109bSMat Martineau if (status) { 46411500109bSMat Martineau l2cap_logical_fail(chan); 46421500109bSMat Martineau __release_logical_link(chan); 46435b155ef9SMat Martineau return; 46445b155ef9SMat Martineau } 46455b155ef9SMat Martineau 46461500109bSMat Martineau if (chan->state != BT_CONNECTED) { 46471500109bSMat Martineau /* Ignore logical link if channel is on BR/EDR */ 46481500109bSMat Martineau if (chan->local_amp_id) 46491500109bSMat Martineau l2cap_logical_finish_create(chan, hchan); 46501500109bSMat Martineau } else { 46511500109bSMat Martineau l2cap_logical_finish_move(chan, hchan); 46521500109bSMat Martineau } 46531500109bSMat Martineau } 46541500109bSMat Martineau 46553f7a56c4SMat Martineau void l2cap_move_start(struct l2cap_chan *chan) 46563f7a56c4SMat Martineau { 46573f7a56c4SMat Martineau BT_DBG("chan %p", chan); 46583f7a56c4SMat Martineau 46593f7a56c4SMat Martineau if (chan->local_amp_id == HCI_BREDR_ID) { 46603f7a56c4SMat Martineau if (chan->chan_policy != BT_CHANNEL_POLICY_AMP_PREFERRED) 46613f7a56c4SMat Martineau return; 46623f7a56c4SMat Martineau chan->move_role = L2CAP_MOVE_ROLE_INITIATOR; 46633f7a56c4SMat Martineau chan->move_state = L2CAP_MOVE_WAIT_PREPARE; 46643f7a56c4SMat Martineau /* Placeholder - start physical link setup */ 46653f7a56c4SMat Martineau } else { 46663f7a56c4SMat Martineau chan->move_role = L2CAP_MOVE_ROLE_INITIATOR; 46673f7a56c4SMat Martineau chan->move_state = L2CAP_MOVE_WAIT_RSP_SUCCESS; 46683f7a56c4SMat Martineau chan->move_id = 0; 46693f7a56c4SMat Martineau l2cap_move_setup(chan); 46703f7a56c4SMat Martineau l2cap_send_move_chan_req(chan, 0); 46713f7a56c4SMat Martineau } 46723f7a56c4SMat Martineau } 46733f7a56c4SMat Martineau 46748eb200bdSMat Martineau static void l2cap_do_create(struct l2cap_chan *chan, int result, 46758eb200bdSMat Martineau u8 local_amp_id, u8 remote_amp_id) 46768eb200bdSMat Martineau { 467762748ca1SAndrei Emeltchenko BT_DBG("chan %p state %s %u -> %u", chan, state_to_string(chan->state), 467862748ca1SAndrei Emeltchenko local_amp_id, remote_amp_id); 467962748ca1SAndrei Emeltchenko 468012d6cc60SAndrei Emeltchenko chan->fcs = L2CAP_FCS_NONE; 468112d6cc60SAndrei Emeltchenko 468262748ca1SAndrei Emeltchenko /* Outgoing channel on AMP */ 468362748ca1SAndrei Emeltchenko if (chan->state == BT_CONNECT) { 468462748ca1SAndrei Emeltchenko if (result == L2CAP_CR_SUCCESS) { 468562748ca1SAndrei Emeltchenko chan->local_amp_id = local_amp_id; 468662748ca1SAndrei Emeltchenko l2cap_send_create_chan_req(chan, remote_amp_id); 468762748ca1SAndrei Emeltchenko } else { 468862748ca1SAndrei Emeltchenko /* Revert to BR/EDR connect */ 468962748ca1SAndrei Emeltchenko l2cap_send_conn_req(chan); 469062748ca1SAndrei Emeltchenko } 469162748ca1SAndrei Emeltchenko 469262748ca1SAndrei Emeltchenko return; 469362748ca1SAndrei Emeltchenko } 469462748ca1SAndrei Emeltchenko 469562748ca1SAndrei Emeltchenko /* Incoming channel on AMP */ 469662748ca1SAndrei Emeltchenko if (__l2cap_no_conn_pending(chan)) { 46978eb200bdSMat Martineau struct l2cap_conn_rsp rsp; 46988eb200bdSMat Martineau char buf[128]; 46998eb200bdSMat Martineau rsp.scid = cpu_to_le16(chan->dcid); 47008eb200bdSMat Martineau rsp.dcid = cpu_to_le16(chan->scid); 47018eb200bdSMat Martineau 47028eb200bdSMat Martineau if (result == L2CAP_CR_SUCCESS) { 47038eb200bdSMat Martineau /* Send successful response */ 470462cd50e2SAndrei Emeltchenko rsp.result = __constant_cpu_to_le16(L2CAP_CR_SUCCESS); 470562cd50e2SAndrei Emeltchenko rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO); 47068eb200bdSMat Martineau } else { 47078eb200bdSMat Martineau /* Send negative response */ 470862cd50e2SAndrei Emeltchenko rsp.result = __constant_cpu_to_le16(L2CAP_CR_NO_MEM); 470962cd50e2SAndrei Emeltchenko rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO); 47108eb200bdSMat Martineau } 47118eb200bdSMat Martineau 47128eb200bdSMat Martineau l2cap_send_cmd(chan->conn, chan->ident, L2CAP_CREATE_CHAN_RSP, 47138eb200bdSMat Martineau sizeof(rsp), &rsp); 47148eb200bdSMat Martineau 47158eb200bdSMat Martineau if (result == L2CAP_CR_SUCCESS) { 47168eb200bdSMat Martineau __l2cap_state_change(chan, BT_CONFIG); 47178eb200bdSMat Martineau set_bit(CONF_REQ_SENT, &chan->conf_state); 47188eb200bdSMat Martineau l2cap_send_cmd(chan->conn, l2cap_get_ident(chan->conn), 47198eb200bdSMat Martineau L2CAP_CONF_REQ, 47208eb200bdSMat Martineau l2cap_build_conf_req(chan, buf), buf); 47218eb200bdSMat Martineau chan->num_conf_req++; 47228eb200bdSMat Martineau } 47238eb200bdSMat Martineau } 47248eb200bdSMat Martineau } 47258eb200bdSMat Martineau 47268eb200bdSMat Martineau static void l2cap_do_move_initiate(struct l2cap_chan *chan, u8 local_amp_id, 47278eb200bdSMat Martineau u8 remote_amp_id) 47288eb200bdSMat Martineau { 47298eb200bdSMat Martineau l2cap_move_setup(chan); 47308eb200bdSMat Martineau chan->move_id = local_amp_id; 47318eb200bdSMat Martineau chan->move_state = L2CAP_MOVE_WAIT_RSP; 47328eb200bdSMat Martineau 47338eb200bdSMat Martineau l2cap_send_move_chan_req(chan, remote_amp_id); 47348eb200bdSMat Martineau } 47358eb200bdSMat Martineau 47368eb200bdSMat Martineau static void l2cap_do_move_respond(struct l2cap_chan *chan, int result) 47378eb200bdSMat Martineau { 47388eb200bdSMat Martineau struct hci_chan *hchan = NULL; 47398eb200bdSMat Martineau 47408eb200bdSMat Martineau /* Placeholder - get hci_chan for logical link */ 47418eb200bdSMat Martineau 47428eb200bdSMat Martineau if (hchan) { 47438eb200bdSMat Martineau if (hchan->state == BT_CONNECTED) { 47448eb200bdSMat Martineau /* Logical link is ready to go */ 47458eb200bdSMat Martineau chan->hs_hcon = hchan->conn; 47468eb200bdSMat Martineau chan->hs_hcon->l2cap_data = chan->conn; 47478eb200bdSMat Martineau chan->move_state = L2CAP_MOVE_WAIT_CONFIRM; 47488eb200bdSMat Martineau l2cap_send_move_chan_rsp(chan, L2CAP_MR_SUCCESS); 47498eb200bdSMat Martineau 47508eb200bdSMat Martineau l2cap_logical_cfm(chan, hchan, L2CAP_MR_SUCCESS); 47518eb200bdSMat Martineau } else { 47528eb200bdSMat Martineau /* Wait for logical link to be ready */ 47538eb200bdSMat Martineau chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_CFM; 47548eb200bdSMat Martineau } 47558eb200bdSMat Martineau } else { 47568eb200bdSMat Martineau /* Logical link not available */ 47578eb200bdSMat Martineau l2cap_send_move_chan_rsp(chan, L2CAP_MR_NOT_ALLOWED); 47588eb200bdSMat Martineau } 47598eb200bdSMat Martineau } 47608eb200bdSMat Martineau 47618eb200bdSMat Martineau static void l2cap_do_move_cancel(struct l2cap_chan *chan, int result) 47628eb200bdSMat Martineau { 47638eb200bdSMat Martineau if (chan->move_role == L2CAP_MOVE_ROLE_RESPONDER) { 47648eb200bdSMat Martineau u8 rsp_result; 47658eb200bdSMat Martineau if (result == -EINVAL) 47668eb200bdSMat Martineau rsp_result = L2CAP_MR_BAD_ID; 47678eb200bdSMat Martineau else 47688eb200bdSMat Martineau rsp_result = L2CAP_MR_NOT_ALLOWED; 47698eb200bdSMat Martineau 47708eb200bdSMat Martineau l2cap_send_move_chan_rsp(chan, rsp_result); 47718eb200bdSMat Martineau } 47728eb200bdSMat Martineau 47738eb200bdSMat Martineau chan->move_role = L2CAP_MOVE_ROLE_NONE; 47748eb200bdSMat Martineau chan->move_state = L2CAP_MOVE_STABLE; 47758eb200bdSMat Martineau 47768eb200bdSMat Martineau /* Restart data transmission */ 47778eb200bdSMat Martineau l2cap_ertm_send(chan); 47788eb200bdSMat Martineau } 47798eb200bdSMat Martineau 4780a514b17fSAndrei Emeltchenko /* Invoke with locked chan */ 4781a514b17fSAndrei Emeltchenko void __l2cap_physical_cfm(struct l2cap_chan *chan, int result) 47828eb200bdSMat Martineau { 4783770bfefaSAndrei Emeltchenko u8 local_amp_id = chan->local_amp_id; 4784fffadc08SAndrei Emeltchenko u8 remote_amp_id = chan->remote_amp_id; 4785770bfefaSAndrei Emeltchenko 47868eb200bdSMat Martineau BT_DBG("chan %p, result %d, local_amp_id %d, remote_amp_id %d", 47878eb200bdSMat Martineau chan, result, local_amp_id, remote_amp_id); 47888eb200bdSMat Martineau 47898eb200bdSMat Martineau if (chan->state == BT_DISCONN || chan->state == BT_CLOSED) { 47908eb200bdSMat Martineau l2cap_chan_unlock(chan); 47918eb200bdSMat Martineau return; 47928eb200bdSMat Martineau } 47938eb200bdSMat Martineau 47948eb200bdSMat Martineau if (chan->state != BT_CONNECTED) { 47958eb200bdSMat Martineau l2cap_do_create(chan, result, local_amp_id, remote_amp_id); 47968eb200bdSMat Martineau } else if (result != L2CAP_MR_SUCCESS) { 47978eb200bdSMat Martineau l2cap_do_move_cancel(chan, result); 47988eb200bdSMat Martineau } else { 47998eb200bdSMat Martineau switch (chan->move_role) { 48008eb200bdSMat Martineau case L2CAP_MOVE_ROLE_INITIATOR: 48018eb200bdSMat Martineau l2cap_do_move_initiate(chan, local_amp_id, 48028eb200bdSMat Martineau remote_amp_id); 48038eb200bdSMat Martineau break; 48048eb200bdSMat Martineau case L2CAP_MOVE_ROLE_RESPONDER: 48058eb200bdSMat Martineau l2cap_do_move_respond(chan, result); 48068eb200bdSMat Martineau break; 48078eb200bdSMat Martineau default: 48088eb200bdSMat Martineau l2cap_do_move_cancel(chan, result); 48098eb200bdSMat Martineau break; 48108eb200bdSMat Martineau } 48118eb200bdSMat Martineau } 48128eb200bdSMat Martineau } 48138eb200bdSMat Martineau 48148d5a04a1SMat Martineau static inline int l2cap_move_channel_req(struct l2cap_conn *conn, 4815ad0ac6caSAndrei Emeltchenko struct l2cap_cmd_hdr *cmd, 4816ad0ac6caSAndrei Emeltchenko u16 cmd_len, void *data) 48178d5a04a1SMat Martineau { 48188d5a04a1SMat Martineau struct l2cap_move_chan_req *req = data; 48191500109bSMat Martineau struct l2cap_move_chan_rsp rsp; 482002b0fbb9SMat Martineau struct l2cap_chan *chan; 48218d5a04a1SMat Martineau u16 icid = 0; 48228d5a04a1SMat Martineau u16 result = L2CAP_MR_NOT_ALLOWED; 48238d5a04a1SMat Martineau 48248d5a04a1SMat Martineau if (cmd_len != sizeof(*req)) 48258d5a04a1SMat Martineau return -EPROTO; 48268d5a04a1SMat Martineau 48278d5a04a1SMat Martineau icid = le16_to_cpu(req->icid); 48288d5a04a1SMat Martineau 4829ad0ac6caSAndrei Emeltchenko BT_DBG("icid 0x%4.4x, dest_amp_id %d", icid, req->dest_amp_id); 48308d5a04a1SMat Martineau 48318d5a04a1SMat Martineau if (!enable_hs) 48328d5a04a1SMat Martineau return -EINVAL; 48338d5a04a1SMat Martineau 483402b0fbb9SMat Martineau chan = l2cap_get_chan_by_dcid(conn, icid); 483502b0fbb9SMat Martineau if (!chan) { 48361500109bSMat Martineau rsp.icid = cpu_to_le16(icid); 48371500109bSMat Martineau rsp.result = __constant_cpu_to_le16(L2CAP_MR_NOT_ALLOWED); 48381500109bSMat Martineau l2cap_send_cmd(conn, cmd->ident, L2CAP_MOVE_CHAN_RSP, 48391500109bSMat Martineau sizeof(rsp), &rsp); 484002b0fbb9SMat Martineau return 0; 484102b0fbb9SMat Martineau } 484202b0fbb9SMat Martineau 48431500109bSMat Martineau chan->ident = cmd->ident; 48441500109bSMat Martineau 484502b0fbb9SMat Martineau if (chan->scid < L2CAP_CID_DYN_START || 484602b0fbb9SMat Martineau chan->chan_policy == BT_CHANNEL_POLICY_BREDR_ONLY || 484702b0fbb9SMat Martineau (chan->mode != L2CAP_MODE_ERTM && 484802b0fbb9SMat Martineau chan->mode != L2CAP_MODE_STREAMING)) { 484902b0fbb9SMat Martineau result = L2CAP_MR_NOT_ALLOWED; 485002b0fbb9SMat Martineau goto send_move_response; 485102b0fbb9SMat Martineau } 485202b0fbb9SMat Martineau 485302b0fbb9SMat Martineau if (chan->local_amp_id == req->dest_amp_id) { 485402b0fbb9SMat Martineau result = L2CAP_MR_SAME_ID; 485502b0fbb9SMat Martineau goto send_move_response; 485602b0fbb9SMat Martineau } 485702b0fbb9SMat Martineau 485802b0fbb9SMat Martineau if (req->dest_amp_id) { 485902b0fbb9SMat Martineau struct hci_dev *hdev; 486002b0fbb9SMat Martineau hdev = hci_dev_get(req->dest_amp_id); 486102b0fbb9SMat Martineau if (!hdev || hdev->dev_type != HCI_AMP || 486202b0fbb9SMat Martineau !test_bit(HCI_UP, &hdev->flags)) { 486302b0fbb9SMat Martineau if (hdev) 486402b0fbb9SMat Martineau hci_dev_put(hdev); 486502b0fbb9SMat Martineau 486602b0fbb9SMat Martineau result = L2CAP_MR_BAD_ID; 486702b0fbb9SMat Martineau goto send_move_response; 486802b0fbb9SMat Martineau } 486902b0fbb9SMat Martineau hci_dev_put(hdev); 487002b0fbb9SMat Martineau } 487102b0fbb9SMat Martineau 487202b0fbb9SMat Martineau /* Detect a move collision. Only send a collision response 487302b0fbb9SMat Martineau * if this side has "lost", otherwise proceed with the move. 487402b0fbb9SMat Martineau * The winner has the larger bd_addr. 487502b0fbb9SMat Martineau */ 487602b0fbb9SMat Martineau if ((__chan_is_moving(chan) || 487702b0fbb9SMat Martineau chan->move_role != L2CAP_MOVE_ROLE_NONE) && 487802b0fbb9SMat Martineau bacmp(conn->src, conn->dst) > 0) { 487902b0fbb9SMat Martineau result = L2CAP_MR_COLLISION; 488002b0fbb9SMat Martineau goto send_move_response; 488102b0fbb9SMat Martineau } 488202b0fbb9SMat Martineau 488302b0fbb9SMat Martineau chan->move_role = L2CAP_MOVE_ROLE_RESPONDER; 488402b0fbb9SMat Martineau l2cap_move_setup(chan); 488502b0fbb9SMat Martineau chan->move_id = req->dest_amp_id; 488602b0fbb9SMat Martineau icid = chan->dcid; 488702b0fbb9SMat Martineau 488802b0fbb9SMat Martineau if (!req->dest_amp_id) { 488902b0fbb9SMat Martineau /* Moving to BR/EDR */ 489002b0fbb9SMat Martineau if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { 489102b0fbb9SMat Martineau chan->move_state = L2CAP_MOVE_WAIT_LOCAL_BUSY; 489202b0fbb9SMat Martineau result = L2CAP_MR_PEND; 489302b0fbb9SMat Martineau } else { 489402b0fbb9SMat Martineau chan->move_state = L2CAP_MOVE_WAIT_CONFIRM; 489502b0fbb9SMat Martineau result = L2CAP_MR_SUCCESS; 489602b0fbb9SMat Martineau } 489702b0fbb9SMat Martineau } else { 489802b0fbb9SMat Martineau chan->move_state = L2CAP_MOVE_WAIT_PREPARE; 489902b0fbb9SMat Martineau /* Placeholder - uncomment when amp functions are available */ 490002b0fbb9SMat Martineau /*amp_accept_physical(chan, req->dest_amp_id);*/ 490102b0fbb9SMat Martineau result = L2CAP_MR_PEND; 490202b0fbb9SMat Martineau } 490302b0fbb9SMat Martineau 490402b0fbb9SMat Martineau send_move_response: 49051500109bSMat Martineau l2cap_send_move_chan_rsp(chan, result); 49068d5a04a1SMat Martineau 490702b0fbb9SMat Martineau l2cap_chan_unlock(chan); 490802b0fbb9SMat Martineau 49098d5a04a1SMat Martineau return 0; 49108d5a04a1SMat Martineau } 49118d5a04a1SMat Martineau 49125b155ef9SMat Martineau static void l2cap_move_continue(struct l2cap_conn *conn, u16 icid, u16 result) 49135b155ef9SMat Martineau { 49145b155ef9SMat Martineau struct l2cap_chan *chan; 49155b155ef9SMat Martineau struct hci_chan *hchan = NULL; 49165b155ef9SMat Martineau 49175b155ef9SMat Martineau chan = l2cap_get_chan_by_scid(conn, icid); 49185b155ef9SMat Martineau if (!chan) { 49195b155ef9SMat Martineau l2cap_send_move_chan_cfm_icid(conn, icid); 49205b155ef9SMat Martineau return; 49215b155ef9SMat Martineau } 49225b155ef9SMat Martineau 49235b155ef9SMat Martineau __clear_chan_timer(chan); 49245b155ef9SMat Martineau if (result == L2CAP_MR_PEND) 49255b155ef9SMat Martineau __set_chan_timer(chan, L2CAP_MOVE_ERTX_TIMEOUT); 49265b155ef9SMat Martineau 49275b155ef9SMat Martineau switch (chan->move_state) { 49285b155ef9SMat Martineau case L2CAP_MOVE_WAIT_LOGICAL_COMP: 49295b155ef9SMat Martineau /* Move confirm will be sent when logical link 49305b155ef9SMat Martineau * is complete. 49315b155ef9SMat Martineau */ 49325b155ef9SMat Martineau chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_CFM; 49335b155ef9SMat Martineau break; 49345b155ef9SMat Martineau case L2CAP_MOVE_WAIT_RSP_SUCCESS: 49355b155ef9SMat Martineau if (result == L2CAP_MR_PEND) { 49365b155ef9SMat Martineau break; 49375b155ef9SMat Martineau } else if (test_bit(CONN_LOCAL_BUSY, 49385b155ef9SMat Martineau &chan->conn_state)) { 49395b155ef9SMat Martineau chan->move_state = L2CAP_MOVE_WAIT_LOCAL_BUSY; 49405b155ef9SMat Martineau } else { 49415b155ef9SMat Martineau /* Logical link is up or moving to BR/EDR, 49425b155ef9SMat Martineau * proceed with move 49435b155ef9SMat Martineau */ 49445b155ef9SMat Martineau chan->move_state = L2CAP_MOVE_WAIT_CONFIRM_RSP; 49455b155ef9SMat Martineau l2cap_send_move_chan_cfm(chan, L2CAP_MC_CONFIRMED); 49465b155ef9SMat Martineau } 49475b155ef9SMat Martineau break; 49485b155ef9SMat Martineau case L2CAP_MOVE_WAIT_RSP: 49495b155ef9SMat Martineau /* Moving to AMP */ 49505b155ef9SMat Martineau if (result == L2CAP_MR_SUCCESS) { 49515b155ef9SMat Martineau /* Remote is ready, send confirm immediately 49525b155ef9SMat Martineau * after logical link is ready 49535b155ef9SMat Martineau */ 49545b155ef9SMat Martineau chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_CFM; 49555b155ef9SMat Martineau } else { 49565b155ef9SMat Martineau /* Both logical link and move success 49575b155ef9SMat Martineau * are required to confirm 49585b155ef9SMat Martineau */ 49595b155ef9SMat Martineau chan->move_state = L2CAP_MOVE_WAIT_LOGICAL_COMP; 49605b155ef9SMat Martineau } 49615b155ef9SMat Martineau 49625b155ef9SMat Martineau /* Placeholder - get hci_chan for logical link */ 49635b155ef9SMat Martineau if (!hchan) { 49645b155ef9SMat Martineau /* Logical link not available */ 49655b155ef9SMat Martineau l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED); 49665b155ef9SMat Martineau break; 49675b155ef9SMat Martineau } 49685b155ef9SMat Martineau 49695b155ef9SMat Martineau /* If the logical link is not yet connected, do not 49705b155ef9SMat Martineau * send confirmation. 49715b155ef9SMat Martineau */ 49725b155ef9SMat Martineau if (hchan->state != BT_CONNECTED) 49735b155ef9SMat Martineau break; 49745b155ef9SMat Martineau 49755b155ef9SMat Martineau /* Logical link is already ready to go */ 49765b155ef9SMat Martineau 49775b155ef9SMat Martineau chan->hs_hcon = hchan->conn; 49785b155ef9SMat Martineau chan->hs_hcon->l2cap_data = chan->conn; 49795b155ef9SMat Martineau 49805b155ef9SMat Martineau if (result == L2CAP_MR_SUCCESS) { 49815b155ef9SMat Martineau /* Can confirm now */ 49825b155ef9SMat Martineau l2cap_send_move_chan_cfm(chan, L2CAP_MC_CONFIRMED); 49835b155ef9SMat Martineau } else { 49845b155ef9SMat Martineau /* Now only need move success 49855b155ef9SMat Martineau * to confirm 49865b155ef9SMat Martineau */ 49875b155ef9SMat Martineau chan->move_state = L2CAP_MOVE_WAIT_RSP_SUCCESS; 49885b155ef9SMat Martineau } 49895b155ef9SMat Martineau 49905b155ef9SMat Martineau l2cap_logical_cfm(chan, hchan, L2CAP_MR_SUCCESS); 49915b155ef9SMat Martineau break; 49925b155ef9SMat Martineau default: 49935b155ef9SMat Martineau /* Any other amp move state means the move failed. */ 49945b155ef9SMat Martineau chan->move_id = chan->local_amp_id; 49955b155ef9SMat Martineau l2cap_move_done(chan); 49965b155ef9SMat Martineau l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED); 49975b155ef9SMat Martineau } 49985b155ef9SMat Martineau 49995b155ef9SMat Martineau l2cap_chan_unlock(chan); 50005b155ef9SMat Martineau } 50015b155ef9SMat Martineau 50025b155ef9SMat Martineau static void l2cap_move_fail(struct l2cap_conn *conn, u8 ident, u16 icid, 50035b155ef9SMat Martineau u16 result) 50045b155ef9SMat Martineau { 50055b155ef9SMat Martineau struct l2cap_chan *chan; 50065b155ef9SMat Martineau 50075b155ef9SMat Martineau chan = l2cap_get_chan_by_ident(conn, ident); 50085b155ef9SMat Martineau if (!chan) { 50095b155ef9SMat Martineau /* Could not locate channel, icid is best guess */ 50105b155ef9SMat Martineau l2cap_send_move_chan_cfm_icid(conn, icid); 50115b155ef9SMat Martineau return; 50125b155ef9SMat Martineau } 50135b155ef9SMat Martineau 50145b155ef9SMat Martineau __clear_chan_timer(chan); 50155b155ef9SMat Martineau 50165b155ef9SMat Martineau if (chan->move_role == L2CAP_MOVE_ROLE_INITIATOR) { 50175b155ef9SMat Martineau if (result == L2CAP_MR_COLLISION) { 50185b155ef9SMat Martineau chan->move_role = L2CAP_MOVE_ROLE_RESPONDER; 50195b155ef9SMat Martineau } else { 50205b155ef9SMat Martineau /* Cleanup - cancel move */ 50215b155ef9SMat Martineau chan->move_id = chan->local_amp_id; 50225b155ef9SMat Martineau l2cap_move_done(chan); 50235b155ef9SMat Martineau } 50245b155ef9SMat Martineau } 50255b155ef9SMat Martineau 50265b155ef9SMat Martineau l2cap_send_move_chan_cfm(chan, L2CAP_MC_UNCONFIRMED); 50275b155ef9SMat Martineau 50285b155ef9SMat Martineau l2cap_chan_unlock(chan); 50295b155ef9SMat Martineau } 50305b155ef9SMat Martineau 50315b155ef9SMat Martineau static int l2cap_move_channel_rsp(struct l2cap_conn *conn, 5032ad0ac6caSAndrei Emeltchenko struct l2cap_cmd_hdr *cmd, 5033ad0ac6caSAndrei Emeltchenko u16 cmd_len, void *data) 50348d5a04a1SMat Martineau { 50358d5a04a1SMat Martineau struct l2cap_move_chan_rsp *rsp = data; 50368d5a04a1SMat Martineau u16 icid, result; 50378d5a04a1SMat Martineau 50388d5a04a1SMat Martineau if (cmd_len != sizeof(*rsp)) 50398d5a04a1SMat Martineau return -EPROTO; 50408d5a04a1SMat Martineau 50418d5a04a1SMat Martineau icid = le16_to_cpu(rsp->icid); 50428d5a04a1SMat Martineau result = le16_to_cpu(rsp->result); 50438d5a04a1SMat Martineau 5044ad0ac6caSAndrei Emeltchenko BT_DBG("icid 0x%4.4x, result 0x%4.4x", icid, result); 50458d5a04a1SMat Martineau 50465b155ef9SMat Martineau if (result == L2CAP_MR_SUCCESS || result == L2CAP_MR_PEND) 50475b155ef9SMat Martineau l2cap_move_continue(conn, icid, result); 50485b155ef9SMat Martineau else 50495b155ef9SMat Martineau l2cap_move_fail(conn, cmd->ident, icid, result); 50508d5a04a1SMat Martineau 50518d5a04a1SMat Martineau return 0; 50528d5a04a1SMat Martineau } 50538d5a04a1SMat Martineau 50545f3847a4SMat Martineau static int l2cap_move_channel_confirm(struct l2cap_conn *conn, 5055ad0ac6caSAndrei Emeltchenko struct l2cap_cmd_hdr *cmd, 5056ad0ac6caSAndrei Emeltchenko u16 cmd_len, void *data) 50578d5a04a1SMat Martineau { 50588d5a04a1SMat Martineau struct l2cap_move_chan_cfm *cfm = data; 50595f3847a4SMat Martineau struct l2cap_chan *chan; 50608d5a04a1SMat Martineau u16 icid, result; 50618d5a04a1SMat Martineau 50628d5a04a1SMat Martineau if (cmd_len != sizeof(*cfm)) 50638d5a04a1SMat Martineau return -EPROTO; 50648d5a04a1SMat Martineau 50658d5a04a1SMat Martineau icid = le16_to_cpu(cfm->icid); 50668d5a04a1SMat Martineau result = le16_to_cpu(cfm->result); 50678d5a04a1SMat Martineau 5068ad0ac6caSAndrei Emeltchenko BT_DBG("icid 0x%4.4x, result 0x%4.4x", icid, result); 50698d5a04a1SMat Martineau 50705f3847a4SMat Martineau chan = l2cap_get_chan_by_dcid(conn, icid); 50715f3847a4SMat Martineau if (!chan) { 50725f3847a4SMat Martineau /* Spec requires a response even if the icid was not found */ 50738d5a04a1SMat Martineau l2cap_send_move_chan_cfm_rsp(conn, cmd->ident, icid); 50745f3847a4SMat Martineau return 0; 50755f3847a4SMat Martineau } 50765f3847a4SMat Martineau 50775f3847a4SMat Martineau if (chan->move_state == L2CAP_MOVE_WAIT_CONFIRM) { 50785f3847a4SMat Martineau if (result == L2CAP_MC_CONFIRMED) { 50795f3847a4SMat Martineau chan->local_amp_id = chan->move_id; 50805f3847a4SMat Martineau if (!chan->local_amp_id) 50815f3847a4SMat Martineau __release_logical_link(chan); 50825f3847a4SMat Martineau } else { 50835f3847a4SMat Martineau chan->move_id = chan->local_amp_id; 50845f3847a4SMat Martineau } 50855f3847a4SMat Martineau 50865f3847a4SMat Martineau l2cap_move_done(chan); 50875f3847a4SMat Martineau } 50885f3847a4SMat Martineau 50895f3847a4SMat Martineau l2cap_send_move_chan_cfm_rsp(conn, cmd->ident, icid); 50905f3847a4SMat Martineau 50915f3847a4SMat Martineau l2cap_chan_unlock(chan); 50928d5a04a1SMat Martineau 50938d5a04a1SMat Martineau return 0; 50948d5a04a1SMat Martineau } 50958d5a04a1SMat Martineau 50968d5a04a1SMat Martineau static inline int l2cap_move_channel_confirm_rsp(struct l2cap_conn *conn, 5097ad0ac6caSAndrei Emeltchenko struct l2cap_cmd_hdr *cmd, 5098ad0ac6caSAndrei Emeltchenko u16 cmd_len, void *data) 50998d5a04a1SMat Martineau { 51008d5a04a1SMat Martineau struct l2cap_move_chan_cfm_rsp *rsp = data; 51013fd71a0aSMat Martineau struct l2cap_chan *chan; 51028d5a04a1SMat Martineau u16 icid; 51038d5a04a1SMat Martineau 51048d5a04a1SMat Martineau if (cmd_len != sizeof(*rsp)) 51058d5a04a1SMat Martineau return -EPROTO; 51068d5a04a1SMat Martineau 51078d5a04a1SMat Martineau icid = le16_to_cpu(rsp->icid); 51088d5a04a1SMat Martineau 5109ad0ac6caSAndrei Emeltchenko BT_DBG("icid 0x%4.4x", icid); 51108d5a04a1SMat Martineau 51113fd71a0aSMat Martineau chan = l2cap_get_chan_by_scid(conn, icid); 51123fd71a0aSMat Martineau if (!chan) 51133fd71a0aSMat Martineau return 0; 51143fd71a0aSMat Martineau 51153fd71a0aSMat Martineau __clear_chan_timer(chan); 51163fd71a0aSMat Martineau 51173fd71a0aSMat Martineau if (chan->move_state == L2CAP_MOVE_WAIT_CONFIRM_RSP) { 51183fd71a0aSMat Martineau chan->local_amp_id = chan->move_id; 51193fd71a0aSMat Martineau 51203fd71a0aSMat Martineau if (!chan->local_amp_id && chan->hs_hchan) 51213fd71a0aSMat Martineau __release_logical_link(chan); 51223fd71a0aSMat Martineau 51233fd71a0aSMat Martineau l2cap_move_done(chan); 51243fd71a0aSMat Martineau } 51253fd71a0aSMat Martineau 51263fd71a0aSMat Martineau l2cap_chan_unlock(chan); 51273fd71a0aSMat Martineau 51288d5a04a1SMat Martineau return 0; 51298d5a04a1SMat Martineau } 51308d5a04a1SMat Martineau 5131e2174ca4SGustavo F. Padovan static inline int l2cap_check_conn_param(u16 min, u16 max, u16 latency, 5132de73115aSClaudio Takahasi u16 to_multiplier) 5133de73115aSClaudio Takahasi { 5134de73115aSClaudio Takahasi u16 max_latency; 5135de73115aSClaudio Takahasi 5136de73115aSClaudio Takahasi if (min > max || min < 6 || max > 3200) 5137de73115aSClaudio Takahasi return -EINVAL; 5138de73115aSClaudio Takahasi 5139de73115aSClaudio Takahasi if (to_multiplier < 10 || to_multiplier > 3200) 5140de73115aSClaudio Takahasi return -EINVAL; 5141de73115aSClaudio Takahasi 5142de73115aSClaudio Takahasi if (max >= to_multiplier * 8) 5143de73115aSClaudio Takahasi return -EINVAL; 5144de73115aSClaudio Takahasi 5145de73115aSClaudio Takahasi max_latency = (to_multiplier * 8 / max) - 1; 5146de73115aSClaudio Takahasi if (latency > 499 || latency > max_latency) 5147de73115aSClaudio Takahasi return -EINVAL; 5148de73115aSClaudio Takahasi 5149de73115aSClaudio Takahasi return 0; 5150de73115aSClaudio Takahasi } 5151de73115aSClaudio Takahasi 5152de73115aSClaudio Takahasi static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn, 51532d792818SGustavo Padovan struct l2cap_cmd_hdr *cmd, 51542d792818SGustavo Padovan u8 *data) 5155de73115aSClaudio Takahasi { 5156de73115aSClaudio Takahasi struct hci_conn *hcon = conn->hcon; 5157de73115aSClaudio Takahasi struct l2cap_conn_param_update_req *req; 5158de73115aSClaudio Takahasi struct l2cap_conn_param_update_rsp rsp; 5159de73115aSClaudio Takahasi u16 min, max, latency, to_multiplier, cmd_len; 51602ce603ebSClaudio Takahasi int err; 5161de73115aSClaudio Takahasi 5162de73115aSClaudio Takahasi if (!(hcon->link_mode & HCI_LM_MASTER)) 5163de73115aSClaudio Takahasi return -EINVAL; 5164de73115aSClaudio Takahasi 5165de73115aSClaudio Takahasi cmd_len = __le16_to_cpu(cmd->len); 5166de73115aSClaudio Takahasi if (cmd_len != sizeof(struct l2cap_conn_param_update_req)) 5167de73115aSClaudio Takahasi return -EPROTO; 5168de73115aSClaudio Takahasi 5169de73115aSClaudio Takahasi req = (struct l2cap_conn_param_update_req *) data; 5170de73115aSClaudio Takahasi min = __le16_to_cpu(req->min); 5171de73115aSClaudio Takahasi max = __le16_to_cpu(req->max); 5172de73115aSClaudio Takahasi latency = __le16_to_cpu(req->latency); 5173de73115aSClaudio Takahasi to_multiplier = __le16_to_cpu(req->to_multiplier); 5174de73115aSClaudio Takahasi 5175de73115aSClaudio Takahasi BT_DBG("min 0x%4.4x max 0x%4.4x latency: 0x%4.4x Timeout: 0x%4.4x", 5176de73115aSClaudio Takahasi min, max, latency, to_multiplier); 5177de73115aSClaudio Takahasi 5178de73115aSClaudio Takahasi memset(&rsp, 0, sizeof(rsp)); 51792ce603ebSClaudio Takahasi 51802ce603ebSClaudio Takahasi err = l2cap_check_conn_param(min, max, latency, to_multiplier); 51812ce603ebSClaudio Takahasi if (err) 5182ac73498cSAndrei Emeltchenko rsp.result = __constant_cpu_to_le16(L2CAP_CONN_PARAM_REJECTED); 5183de73115aSClaudio Takahasi else 5184ac73498cSAndrei Emeltchenko rsp.result = __constant_cpu_to_le16(L2CAP_CONN_PARAM_ACCEPTED); 5185de73115aSClaudio Takahasi 5186de73115aSClaudio Takahasi l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_PARAM_UPDATE_RSP, 5187de73115aSClaudio Takahasi sizeof(rsp), &rsp); 5188de73115aSClaudio Takahasi 51892ce603ebSClaudio Takahasi if (!err) 51902ce603ebSClaudio Takahasi hci_le_conn_update(hcon, min, max, latency, to_multiplier); 51912ce603ebSClaudio Takahasi 5192de73115aSClaudio Takahasi return 0; 5193de73115aSClaudio Takahasi } 5194de73115aSClaudio Takahasi 51953300d9a9SClaudio Takahasi static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn, 51962d792818SGustavo Padovan struct l2cap_cmd_hdr *cmd, u16 cmd_len, 51972d792818SGustavo Padovan u8 *data) 51983300d9a9SClaudio Takahasi { 51993300d9a9SClaudio Takahasi int err = 0; 52003300d9a9SClaudio Takahasi 52013300d9a9SClaudio Takahasi switch (cmd->code) { 52023300d9a9SClaudio Takahasi case L2CAP_COMMAND_REJ: 5203cb3b3152SJohan Hedberg l2cap_command_rej(conn, cmd, cmd_len, data); 52043300d9a9SClaudio Takahasi break; 52053300d9a9SClaudio Takahasi 52063300d9a9SClaudio Takahasi case L2CAP_CONN_REQ: 5207cb3b3152SJohan Hedberg err = l2cap_connect_req(conn, cmd, cmd_len, data); 52083300d9a9SClaudio Takahasi break; 52093300d9a9SClaudio Takahasi 52103300d9a9SClaudio Takahasi case L2CAP_CONN_RSP: 5211f5a2598dSMat Martineau case L2CAP_CREATE_CHAN_RSP: 5212cb3b3152SJohan Hedberg err = l2cap_connect_create_rsp(conn, cmd, cmd_len, data); 52133300d9a9SClaudio Takahasi break; 52143300d9a9SClaudio Takahasi 52153300d9a9SClaudio Takahasi case L2CAP_CONF_REQ: 52163300d9a9SClaudio Takahasi err = l2cap_config_req(conn, cmd, cmd_len, data); 52173300d9a9SClaudio Takahasi break; 52183300d9a9SClaudio Takahasi 52193300d9a9SClaudio Takahasi case L2CAP_CONF_RSP: 5220cb3b3152SJohan Hedberg err = l2cap_config_rsp(conn, cmd, cmd_len, data); 52213300d9a9SClaudio Takahasi break; 52223300d9a9SClaudio Takahasi 52233300d9a9SClaudio Takahasi case L2CAP_DISCONN_REQ: 5224cb3b3152SJohan Hedberg err = l2cap_disconnect_req(conn, cmd, cmd_len, data); 52253300d9a9SClaudio Takahasi break; 52263300d9a9SClaudio Takahasi 52273300d9a9SClaudio Takahasi case L2CAP_DISCONN_RSP: 5228cb3b3152SJohan Hedberg err = l2cap_disconnect_rsp(conn, cmd, cmd_len, data); 52293300d9a9SClaudio Takahasi break; 52303300d9a9SClaudio Takahasi 52313300d9a9SClaudio Takahasi case L2CAP_ECHO_REQ: 52323300d9a9SClaudio Takahasi l2cap_send_cmd(conn, cmd->ident, L2CAP_ECHO_RSP, cmd_len, data); 52333300d9a9SClaudio Takahasi break; 52343300d9a9SClaudio Takahasi 52353300d9a9SClaudio Takahasi case L2CAP_ECHO_RSP: 52363300d9a9SClaudio Takahasi break; 52373300d9a9SClaudio Takahasi 52383300d9a9SClaudio Takahasi case L2CAP_INFO_REQ: 5239cb3b3152SJohan Hedberg err = l2cap_information_req(conn, cmd, cmd_len, data); 52403300d9a9SClaudio Takahasi break; 52413300d9a9SClaudio Takahasi 52423300d9a9SClaudio Takahasi case L2CAP_INFO_RSP: 5243cb3b3152SJohan Hedberg err = l2cap_information_rsp(conn, cmd, cmd_len, data); 52443300d9a9SClaudio Takahasi break; 52453300d9a9SClaudio Takahasi 5246f94ff6ffSMat Martineau case L2CAP_CREATE_CHAN_REQ: 5247f94ff6ffSMat Martineau err = l2cap_create_channel_req(conn, cmd, cmd_len, data); 5248f94ff6ffSMat Martineau break; 5249f94ff6ffSMat Martineau 52508d5a04a1SMat Martineau case L2CAP_MOVE_CHAN_REQ: 52518d5a04a1SMat Martineau err = l2cap_move_channel_req(conn, cmd, cmd_len, data); 52528d5a04a1SMat Martineau break; 52538d5a04a1SMat Martineau 52548d5a04a1SMat Martineau case L2CAP_MOVE_CHAN_RSP: 52558d5a04a1SMat Martineau err = l2cap_move_channel_rsp(conn, cmd, cmd_len, data); 52568d5a04a1SMat Martineau break; 52578d5a04a1SMat Martineau 52588d5a04a1SMat Martineau case L2CAP_MOVE_CHAN_CFM: 52598d5a04a1SMat Martineau err = l2cap_move_channel_confirm(conn, cmd, cmd_len, data); 52608d5a04a1SMat Martineau break; 52618d5a04a1SMat Martineau 52628d5a04a1SMat Martineau case L2CAP_MOVE_CHAN_CFM_RSP: 52638d5a04a1SMat Martineau err = l2cap_move_channel_confirm_rsp(conn, cmd, cmd_len, data); 52648d5a04a1SMat Martineau break; 52658d5a04a1SMat Martineau 52663300d9a9SClaudio Takahasi default: 52673300d9a9SClaudio Takahasi BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code); 52683300d9a9SClaudio Takahasi err = -EINVAL; 52693300d9a9SClaudio Takahasi break; 52703300d9a9SClaudio Takahasi } 52713300d9a9SClaudio Takahasi 52723300d9a9SClaudio Takahasi return err; 52733300d9a9SClaudio Takahasi } 52743300d9a9SClaudio Takahasi 52753300d9a9SClaudio Takahasi static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn, 52763300d9a9SClaudio Takahasi struct l2cap_cmd_hdr *cmd, u8 *data) 52773300d9a9SClaudio Takahasi { 52783300d9a9SClaudio Takahasi switch (cmd->code) { 52793300d9a9SClaudio Takahasi case L2CAP_COMMAND_REJ: 52803300d9a9SClaudio Takahasi return 0; 52813300d9a9SClaudio Takahasi 52823300d9a9SClaudio Takahasi case L2CAP_CONN_PARAM_UPDATE_REQ: 5283de73115aSClaudio Takahasi return l2cap_conn_param_update_req(conn, cmd, data); 52843300d9a9SClaudio Takahasi 52853300d9a9SClaudio Takahasi case L2CAP_CONN_PARAM_UPDATE_RSP: 52863300d9a9SClaudio Takahasi return 0; 52873300d9a9SClaudio Takahasi 52883300d9a9SClaudio Takahasi default: 52893300d9a9SClaudio Takahasi BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code); 52903300d9a9SClaudio Takahasi return -EINVAL; 52913300d9a9SClaudio Takahasi } 52923300d9a9SClaudio Takahasi } 52933300d9a9SClaudio Takahasi 5294c5623556SJohan Hedberg static inline void l2cap_le_sig_channel(struct l2cap_conn *conn, 5295c5623556SJohan Hedberg struct sk_buff *skb) 5296c5623556SJohan Hedberg { 5297c5623556SJohan Hedberg u8 *data = skb->data; 5298c5623556SJohan Hedberg int len = skb->len; 5299c5623556SJohan Hedberg struct l2cap_cmd_hdr cmd; 5300c5623556SJohan Hedberg int err; 5301c5623556SJohan Hedberg 5302c5623556SJohan Hedberg l2cap_raw_recv(conn, skb); 5303c5623556SJohan Hedberg 5304c5623556SJohan Hedberg while (len >= L2CAP_CMD_HDR_SIZE) { 5305c5623556SJohan Hedberg u16 cmd_len; 5306c5623556SJohan Hedberg memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); 5307c5623556SJohan Hedberg data += L2CAP_CMD_HDR_SIZE; 5308c5623556SJohan Hedberg len -= L2CAP_CMD_HDR_SIZE; 5309c5623556SJohan Hedberg 5310c5623556SJohan Hedberg cmd_len = le16_to_cpu(cmd.len); 5311c5623556SJohan Hedberg 5312c5623556SJohan Hedberg BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, 5313c5623556SJohan Hedberg cmd.ident); 5314c5623556SJohan Hedberg 5315c5623556SJohan Hedberg if (cmd_len > len || !cmd.ident) { 5316c5623556SJohan Hedberg BT_DBG("corrupted command"); 5317c5623556SJohan Hedberg break; 5318c5623556SJohan Hedberg } 5319c5623556SJohan Hedberg 5320c5623556SJohan Hedberg err = l2cap_le_sig_cmd(conn, &cmd, data); 5321c5623556SJohan Hedberg if (err) { 5322c5623556SJohan Hedberg struct l2cap_cmd_rej_unk rej; 5323c5623556SJohan Hedberg 5324c5623556SJohan Hedberg BT_ERR("Wrong link type (%d)", err); 5325c5623556SJohan Hedberg 5326c5623556SJohan Hedberg /* FIXME: Map err to a valid reason */ 5327c5623556SJohan Hedberg rej.reason = __constant_cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD); 5328c5623556SJohan Hedberg l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, 5329c5623556SJohan Hedberg sizeof(rej), &rej); 5330c5623556SJohan Hedberg } 5331c5623556SJohan Hedberg 5332c5623556SJohan Hedberg data += cmd_len; 5333c5623556SJohan Hedberg len -= cmd_len; 5334c5623556SJohan Hedberg } 5335c5623556SJohan Hedberg 5336c5623556SJohan Hedberg kfree_skb(skb); 5337c5623556SJohan Hedberg } 5338c5623556SJohan Hedberg 53393300d9a9SClaudio Takahasi static inline void l2cap_sig_channel(struct l2cap_conn *conn, 53403300d9a9SClaudio Takahasi struct sk_buff *skb) 53410a708f8fSGustavo F. Padovan { 53420a708f8fSGustavo F. Padovan u8 *data = skb->data; 53430a708f8fSGustavo F. Padovan int len = skb->len; 53440a708f8fSGustavo F. Padovan struct l2cap_cmd_hdr cmd; 53453300d9a9SClaudio Takahasi int err; 53460a708f8fSGustavo F. Padovan 53470a708f8fSGustavo F. Padovan l2cap_raw_recv(conn, skb); 53480a708f8fSGustavo F. Padovan 53490a708f8fSGustavo F. Padovan while (len >= L2CAP_CMD_HDR_SIZE) { 53500a708f8fSGustavo F. Padovan u16 cmd_len; 53510a708f8fSGustavo F. Padovan memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); 53520a708f8fSGustavo F. Padovan data += L2CAP_CMD_HDR_SIZE; 53530a708f8fSGustavo F. Padovan len -= L2CAP_CMD_HDR_SIZE; 53540a708f8fSGustavo F. Padovan 53550a708f8fSGustavo F. Padovan cmd_len = le16_to_cpu(cmd.len); 53560a708f8fSGustavo F. Padovan 53572d792818SGustavo Padovan BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, 53582d792818SGustavo Padovan cmd.ident); 53590a708f8fSGustavo F. Padovan 53600a708f8fSGustavo F. Padovan if (cmd_len > len || !cmd.ident) { 53610a708f8fSGustavo F. Padovan BT_DBG("corrupted command"); 53620a708f8fSGustavo F. Padovan break; 53630a708f8fSGustavo F. Padovan } 53640a708f8fSGustavo F. Padovan 53653300d9a9SClaudio Takahasi err = l2cap_bredr_sig_cmd(conn, &cmd, cmd_len, data); 53660a708f8fSGustavo F. Padovan if (err) { 5367e2fd318eSIlia Kolomisnky struct l2cap_cmd_rej_unk rej; 53682c6d1a2eSGustavo F. Padovan 53692c6d1a2eSGustavo F. Padovan BT_ERR("Wrong link type (%d)", err); 53700a708f8fSGustavo F. Padovan 53710a708f8fSGustavo F. Padovan /* FIXME: Map err to a valid reason */ 5372ac73498cSAndrei Emeltchenko rej.reason = __constant_cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD); 53732d792818SGustavo Padovan l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, 53742d792818SGustavo Padovan sizeof(rej), &rej); 53750a708f8fSGustavo F. Padovan } 53760a708f8fSGustavo F. Padovan 53770a708f8fSGustavo F. Padovan data += cmd_len; 53780a708f8fSGustavo F. Padovan len -= cmd_len; 53790a708f8fSGustavo F. Padovan } 53800a708f8fSGustavo F. Padovan 53810a708f8fSGustavo F. Padovan kfree_skb(skb); 53820a708f8fSGustavo F. Padovan } 53830a708f8fSGustavo F. Padovan 538447d1ec61SGustavo F. Padovan static int l2cap_check_fcs(struct l2cap_chan *chan, struct sk_buff *skb) 53850a708f8fSGustavo F. Padovan { 53860a708f8fSGustavo F. Padovan u16 our_fcs, rcv_fcs; 5387e4ca6d98SAndrei Emeltchenko int hdr_size; 5388e4ca6d98SAndrei Emeltchenko 5389e4ca6d98SAndrei Emeltchenko if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 5390e4ca6d98SAndrei Emeltchenko hdr_size = L2CAP_EXT_HDR_SIZE; 5391e4ca6d98SAndrei Emeltchenko else 5392e4ca6d98SAndrei Emeltchenko hdr_size = L2CAP_ENH_HDR_SIZE; 53930a708f8fSGustavo F. Padovan 539447d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) { 539503a51213SAndrei Emeltchenko skb_trim(skb, skb->len - L2CAP_FCS_SIZE); 53960a708f8fSGustavo F. Padovan rcv_fcs = get_unaligned_le16(skb->data + skb->len); 53970a708f8fSGustavo F. Padovan our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); 53980a708f8fSGustavo F. Padovan 53990a708f8fSGustavo F. Padovan if (our_fcs != rcv_fcs) 54000a708f8fSGustavo F. Padovan return -EBADMSG; 54010a708f8fSGustavo F. Padovan } 54020a708f8fSGustavo F. Padovan return 0; 54030a708f8fSGustavo F. Padovan } 54040a708f8fSGustavo F. Padovan 54056ea00485SMat Martineau static void l2cap_send_i_or_rr_or_rnr(struct l2cap_chan *chan) 54060a708f8fSGustavo F. Padovan { 5407e31f7633SMat Martineau struct l2cap_ctrl control; 54080a708f8fSGustavo F. Padovan 5409e31f7633SMat Martineau BT_DBG("chan %p", chan); 54100a708f8fSGustavo F. Padovan 5411e31f7633SMat Martineau memset(&control, 0, sizeof(control)); 5412e31f7633SMat Martineau control.sframe = 1; 5413e31f7633SMat Martineau control.final = 1; 5414e31f7633SMat Martineau control.reqseq = chan->buffer_seq; 5415e31f7633SMat Martineau set_bit(CONN_SEND_FBIT, &chan->conn_state); 54160a708f8fSGustavo F. Padovan 5417e2ab4353SGustavo F. Padovan if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { 5418e31f7633SMat Martineau control.super = L2CAP_SUPER_RNR; 5419e31f7633SMat Martineau l2cap_send_sframe(chan, &control); 54200a708f8fSGustavo F. Padovan } 54210a708f8fSGustavo F. Padovan 5422e31f7633SMat Martineau if (test_and_clear_bit(CONN_REMOTE_BUSY, &chan->conn_state) && 5423e31f7633SMat Martineau chan->unacked_frames > 0) 5424e31f7633SMat Martineau __set_retrans_timer(chan); 54250a708f8fSGustavo F. Padovan 5426e31f7633SMat Martineau /* Send pending iframes */ 5427525cd185SGustavo F. Padovan l2cap_ertm_send(chan); 54280a708f8fSGustavo F. Padovan 5429e2ab4353SGustavo F. Padovan if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state) && 5430e31f7633SMat Martineau test_bit(CONN_SEND_FBIT, &chan->conn_state)) { 5431e31f7633SMat Martineau /* F-bit wasn't sent in an s-frame or i-frame yet, so 5432e31f7633SMat Martineau * send it now. 5433e31f7633SMat Martineau */ 5434e31f7633SMat Martineau control.super = L2CAP_SUPER_RR; 5435e31f7633SMat Martineau l2cap_send_sframe(chan, &control); 54360a708f8fSGustavo F. Padovan } 54370a708f8fSGustavo F. Padovan } 54380a708f8fSGustavo F. Padovan 54392d792818SGustavo Padovan static void append_skb_frag(struct sk_buff *skb, struct sk_buff *new_frag, 54402d792818SGustavo Padovan struct sk_buff **last_frag) 54410a708f8fSGustavo F. Padovan { 544284084a31SMat Martineau /* skb->len reflects data in skb as well as all fragments 544384084a31SMat Martineau * skb->data_len reflects only data in fragments 544484084a31SMat Martineau */ 544584084a31SMat Martineau if (!skb_has_frag_list(skb)) 544684084a31SMat Martineau skb_shinfo(skb)->frag_list = new_frag; 544784084a31SMat Martineau 544884084a31SMat Martineau new_frag->next = NULL; 544984084a31SMat Martineau 545084084a31SMat Martineau (*last_frag)->next = new_frag; 545184084a31SMat Martineau *last_frag = new_frag; 545284084a31SMat Martineau 545384084a31SMat Martineau skb->len += new_frag->len; 545484084a31SMat Martineau skb->data_len += new_frag->len; 545584084a31SMat Martineau skb->truesize += new_frag->truesize; 545684084a31SMat Martineau } 545784084a31SMat Martineau 54584b51dae9SMat Martineau static int l2cap_reassemble_sdu(struct l2cap_chan *chan, struct sk_buff *skb, 54594b51dae9SMat Martineau struct l2cap_ctrl *control) 546084084a31SMat Martineau { 546184084a31SMat Martineau int err = -EINVAL; 54620a708f8fSGustavo F. Padovan 54634b51dae9SMat Martineau switch (control->sar) { 54647e0ef6eeSAndrei Emeltchenko case L2CAP_SAR_UNSEGMENTED: 546584084a31SMat Martineau if (chan->sdu) 546684084a31SMat Martineau break; 54670a708f8fSGustavo F. Padovan 546880b98027SGustavo Padovan err = chan->ops->recv(chan, skb); 546984084a31SMat Martineau break; 54700a708f8fSGustavo F. Padovan 54717e0ef6eeSAndrei Emeltchenko case L2CAP_SAR_START: 547284084a31SMat Martineau if (chan->sdu) 547384084a31SMat Martineau break; 54740a708f8fSGustavo F. Padovan 54756f61fd47SGustavo F. Padovan chan->sdu_len = get_unaligned_le16(skb->data); 547603a51213SAndrei Emeltchenko skb_pull(skb, L2CAP_SDULEN_SIZE); 54770a708f8fSGustavo F. Padovan 547884084a31SMat Martineau if (chan->sdu_len > chan->imtu) { 547984084a31SMat Martineau err = -EMSGSIZE; 548084084a31SMat Martineau break; 548184084a31SMat Martineau } 54820a708f8fSGustavo F. Padovan 548384084a31SMat Martineau if (skb->len >= chan->sdu_len) 548484084a31SMat Martineau break; 548584084a31SMat Martineau 548684084a31SMat Martineau chan->sdu = skb; 548784084a31SMat Martineau chan->sdu_last_frag = skb; 548884084a31SMat Martineau 548984084a31SMat Martineau skb = NULL; 549084084a31SMat Martineau err = 0; 54910a708f8fSGustavo F. Padovan break; 54920a708f8fSGustavo F. Padovan 54937e0ef6eeSAndrei Emeltchenko case L2CAP_SAR_CONTINUE: 54946f61fd47SGustavo F. Padovan if (!chan->sdu) 549584084a31SMat Martineau break; 54960a708f8fSGustavo F. Padovan 549784084a31SMat Martineau append_skb_frag(chan->sdu, skb, 549884084a31SMat Martineau &chan->sdu_last_frag); 549984084a31SMat Martineau skb = NULL; 55000a708f8fSGustavo F. Padovan 550184084a31SMat Martineau if (chan->sdu->len >= chan->sdu_len) 550284084a31SMat Martineau break; 55030a708f8fSGustavo F. Padovan 550484084a31SMat Martineau err = 0; 55050a708f8fSGustavo F. Padovan break; 55060a708f8fSGustavo F. Padovan 55077e0ef6eeSAndrei Emeltchenko case L2CAP_SAR_END: 55086f61fd47SGustavo F. Padovan if (!chan->sdu) 550984084a31SMat Martineau break; 55100a708f8fSGustavo F. Padovan 551184084a31SMat Martineau append_skb_frag(chan->sdu, skb, 551284084a31SMat Martineau &chan->sdu_last_frag); 551384084a31SMat Martineau skb = NULL; 55140a708f8fSGustavo F. Padovan 551584084a31SMat Martineau if (chan->sdu->len != chan->sdu_len) 551684084a31SMat Martineau break; 55170a708f8fSGustavo F. Padovan 551880b98027SGustavo Padovan err = chan->ops->recv(chan, chan->sdu); 55190a708f8fSGustavo F. Padovan 552084084a31SMat Martineau if (!err) { 552184084a31SMat Martineau /* Reassembly complete */ 552284084a31SMat Martineau chan->sdu = NULL; 552384084a31SMat Martineau chan->sdu_last_frag = NULL; 552484084a31SMat Martineau chan->sdu_len = 0; 55250a708f8fSGustavo F. Padovan } 55260a708f8fSGustavo F. Padovan break; 55270a708f8fSGustavo F. Padovan } 55280a708f8fSGustavo F. Padovan 552984084a31SMat Martineau if (err) { 55300a708f8fSGustavo F. Padovan kfree_skb(skb); 55316f61fd47SGustavo F. Padovan kfree_skb(chan->sdu); 55326f61fd47SGustavo F. Padovan chan->sdu = NULL; 553384084a31SMat Martineau chan->sdu_last_frag = NULL; 553484084a31SMat Martineau chan->sdu_len = 0; 553584084a31SMat Martineau } 55360a708f8fSGustavo F. Padovan 553784084a31SMat Martineau return err; 55380a708f8fSGustavo F. Padovan } 55390a708f8fSGustavo F. Padovan 554032b32735SMat Martineau static int l2cap_resegment(struct l2cap_chan *chan) 554132b32735SMat Martineau { 554232b32735SMat Martineau /* Placeholder */ 554332b32735SMat Martineau return 0; 554432b32735SMat Martineau } 554532b32735SMat Martineau 5546e328140fSMat Martineau void l2cap_chan_busy(struct l2cap_chan *chan, int busy) 55470a708f8fSGustavo F. Padovan { 554861aa4f5bSMat Martineau u8 event; 554961aa4f5bSMat Martineau 555061aa4f5bSMat Martineau if (chan->mode != L2CAP_MODE_ERTM) 555161aa4f5bSMat Martineau return; 555261aa4f5bSMat Martineau 555361aa4f5bSMat Martineau event = busy ? L2CAP_EV_LOCAL_BUSY_DETECTED : L2CAP_EV_LOCAL_BUSY_CLEAR; 5554401bb1f7SAndrei Emeltchenko l2cap_tx(chan, NULL, NULL, event); 55550a708f8fSGustavo F. Padovan } 55560a708f8fSGustavo F. Padovan 5557d2a7ac5dSMat Martineau static int l2cap_rx_queued_iframes(struct l2cap_chan *chan) 5558d2a7ac5dSMat Martineau { 555963838725SMat Martineau int err = 0; 556063838725SMat Martineau /* Pass sequential frames to l2cap_reassemble_sdu() 556163838725SMat Martineau * until a gap is encountered. 556263838725SMat Martineau */ 556363838725SMat Martineau 556463838725SMat Martineau BT_DBG("chan %p", chan); 556563838725SMat Martineau 556663838725SMat Martineau while (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { 556763838725SMat Martineau struct sk_buff *skb; 556863838725SMat Martineau BT_DBG("Searching for skb with txseq %d (queue len %d)", 556963838725SMat Martineau chan->buffer_seq, skb_queue_len(&chan->srej_q)); 557063838725SMat Martineau 557163838725SMat Martineau skb = l2cap_ertm_seq_in_queue(&chan->srej_q, chan->buffer_seq); 557263838725SMat Martineau 557363838725SMat Martineau if (!skb) 557463838725SMat Martineau break; 557563838725SMat Martineau 557663838725SMat Martineau skb_unlink(skb, &chan->srej_q); 557763838725SMat Martineau chan->buffer_seq = __next_seq(chan, chan->buffer_seq); 557863838725SMat Martineau err = l2cap_reassemble_sdu(chan, skb, &bt_cb(skb)->control); 557963838725SMat Martineau if (err) 558063838725SMat Martineau break; 558163838725SMat Martineau } 558263838725SMat Martineau 558363838725SMat Martineau if (skb_queue_empty(&chan->srej_q)) { 558463838725SMat Martineau chan->rx_state = L2CAP_RX_STATE_RECV; 558563838725SMat Martineau l2cap_send_ack(chan); 558663838725SMat Martineau } 558763838725SMat Martineau 558863838725SMat Martineau return err; 5589d2a7ac5dSMat Martineau } 5590d2a7ac5dSMat Martineau 5591d2a7ac5dSMat Martineau static void l2cap_handle_srej(struct l2cap_chan *chan, 5592d2a7ac5dSMat Martineau struct l2cap_ctrl *control) 5593d2a7ac5dSMat Martineau { 5594f80842a8SMat Martineau struct sk_buff *skb; 5595f80842a8SMat Martineau 5596f80842a8SMat Martineau BT_DBG("chan %p, control %p", chan, control); 5597f80842a8SMat Martineau 5598f80842a8SMat Martineau if (control->reqseq == chan->next_tx_seq) { 5599f80842a8SMat Martineau BT_DBG("Invalid reqseq %d, disconnecting", control->reqseq); 56005e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 5601f80842a8SMat Martineau return; 5602f80842a8SMat Martineau } 5603f80842a8SMat Martineau 5604f80842a8SMat Martineau skb = l2cap_ertm_seq_in_queue(&chan->tx_q, control->reqseq); 5605f80842a8SMat Martineau 5606f80842a8SMat Martineau if (skb == NULL) { 5607f80842a8SMat Martineau BT_DBG("Seq %d not available for retransmission", 5608f80842a8SMat Martineau control->reqseq); 5609f80842a8SMat Martineau return; 5610f80842a8SMat Martineau } 5611f80842a8SMat Martineau 5612f80842a8SMat Martineau if (chan->max_tx != 0 && bt_cb(skb)->control.retries >= chan->max_tx) { 5613f80842a8SMat Martineau BT_DBG("Retry limit exceeded (%d)", chan->max_tx); 56145e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 5615f80842a8SMat Martineau return; 5616f80842a8SMat Martineau } 5617f80842a8SMat Martineau 5618f80842a8SMat Martineau clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); 5619f80842a8SMat Martineau 5620f80842a8SMat Martineau if (control->poll) { 5621f80842a8SMat Martineau l2cap_pass_to_tx(chan, control); 5622f80842a8SMat Martineau 5623f80842a8SMat Martineau set_bit(CONN_SEND_FBIT, &chan->conn_state); 5624f80842a8SMat Martineau l2cap_retransmit(chan, control); 5625f80842a8SMat Martineau l2cap_ertm_send(chan); 5626f80842a8SMat Martineau 5627f80842a8SMat Martineau if (chan->tx_state == L2CAP_TX_STATE_WAIT_F) { 5628f80842a8SMat Martineau set_bit(CONN_SREJ_ACT, &chan->conn_state); 5629f80842a8SMat Martineau chan->srej_save_reqseq = control->reqseq; 5630f80842a8SMat Martineau } 5631f80842a8SMat Martineau } else { 5632f80842a8SMat Martineau l2cap_pass_to_tx_fbit(chan, control); 5633f80842a8SMat Martineau 5634f80842a8SMat Martineau if (control->final) { 5635f80842a8SMat Martineau if (chan->srej_save_reqseq != control->reqseq || 5636f80842a8SMat Martineau !test_and_clear_bit(CONN_SREJ_ACT, 5637f80842a8SMat Martineau &chan->conn_state)) 5638f80842a8SMat Martineau l2cap_retransmit(chan, control); 5639f80842a8SMat Martineau } else { 5640f80842a8SMat Martineau l2cap_retransmit(chan, control); 5641f80842a8SMat Martineau if (chan->tx_state == L2CAP_TX_STATE_WAIT_F) { 5642f80842a8SMat Martineau set_bit(CONN_SREJ_ACT, &chan->conn_state); 5643f80842a8SMat Martineau chan->srej_save_reqseq = control->reqseq; 5644f80842a8SMat Martineau } 5645f80842a8SMat Martineau } 5646f80842a8SMat Martineau } 5647d2a7ac5dSMat Martineau } 5648d2a7ac5dSMat Martineau 5649d2a7ac5dSMat Martineau static void l2cap_handle_rej(struct l2cap_chan *chan, 5650d2a7ac5dSMat Martineau struct l2cap_ctrl *control) 5651d2a7ac5dSMat Martineau { 5652fcd289dfSMat Martineau struct sk_buff *skb; 5653fcd289dfSMat Martineau 5654fcd289dfSMat Martineau BT_DBG("chan %p, control %p", chan, control); 5655fcd289dfSMat Martineau 5656fcd289dfSMat Martineau if (control->reqseq == chan->next_tx_seq) { 5657fcd289dfSMat Martineau BT_DBG("Invalid reqseq %d, disconnecting", control->reqseq); 56585e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 5659fcd289dfSMat Martineau return; 5660fcd289dfSMat Martineau } 5661fcd289dfSMat Martineau 5662fcd289dfSMat Martineau skb = l2cap_ertm_seq_in_queue(&chan->tx_q, control->reqseq); 5663fcd289dfSMat Martineau 5664fcd289dfSMat Martineau if (chan->max_tx && skb && 5665fcd289dfSMat Martineau bt_cb(skb)->control.retries >= chan->max_tx) { 5666fcd289dfSMat Martineau BT_DBG("Retry limit exceeded (%d)", chan->max_tx); 56675e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 5668fcd289dfSMat Martineau return; 5669fcd289dfSMat Martineau } 5670fcd289dfSMat Martineau 5671fcd289dfSMat Martineau clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); 5672fcd289dfSMat Martineau 5673fcd289dfSMat Martineau l2cap_pass_to_tx(chan, control); 5674fcd289dfSMat Martineau 5675fcd289dfSMat Martineau if (control->final) { 5676fcd289dfSMat Martineau if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) 5677fcd289dfSMat Martineau l2cap_retransmit_all(chan, control); 5678fcd289dfSMat Martineau } else { 5679fcd289dfSMat Martineau l2cap_retransmit_all(chan, control); 5680fcd289dfSMat Martineau l2cap_ertm_send(chan); 5681fcd289dfSMat Martineau if (chan->tx_state == L2CAP_TX_STATE_WAIT_F) 5682fcd289dfSMat Martineau set_bit(CONN_REJ_ACT, &chan->conn_state); 5683fcd289dfSMat Martineau } 5684d2a7ac5dSMat Martineau } 5685d2a7ac5dSMat Martineau 56864b51dae9SMat Martineau static u8 l2cap_classify_txseq(struct l2cap_chan *chan, u16 txseq) 56874b51dae9SMat Martineau { 56884b51dae9SMat Martineau BT_DBG("chan %p, txseq %d", chan, txseq); 56894b51dae9SMat Martineau 56904b51dae9SMat Martineau BT_DBG("last_acked_seq %d, expected_tx_seq %d", chan->last_acked_seq, 56914b51dae9SMat Martineau chan->expected_tx_seq); 56924b51dae9SMat Martineau 56934b51dae9SMat Martineau if (chan->rx_state == L2CAP_RX_STATE_SREJ_SENT) { 56944b51dae9SMat Martineau if (__seq_offset(chan, txseq, chan->last_acked_seq) >= 56954b51dae9SMat Martineau chan->tx_win) { 56964b51dae9SMat Martineau /* See notes below regarding "double poll" and 56974b51dae9SMat Martineau * invalid packets. 56984b51dae9SMat Martineau */ 56994b51dae9SMat Martineau if (chan->tx_win <= ((chan->tx_win_max + 1) >> 1)) { 57004b51dae9SMat Martineau BT_DBG("Invalid/Ignore - after SREJ"); 57014b51dae9SMat Martineau return L2CAP_TXSEQ_INVALID_IGNORE; 57024b51dae9SMat Martineau } else { 57034b51dae9SMat Martineau BT_DBG("Invalid - in window after SREJ sent"); 57044b51dae9SMat Martineau return L2CAP_TXSEQ_INVALID; 57054b51dae9SMat Martineau } 57064b51dae9SMat Martineau } 57074b51dae9SMat Martineau 57084b51dae9SMat Martineau if (chan->srej_list.head == txseq) { 57094b51dae9SMat Martineau BT_DBG("Expected SREJ"); 57104b51dae9SMat Martineau return L2CAP_TXSEQ_EXPECTED_SREJ; 57114b51dae9SMat Martineau } 57124b51dae9SMat Martineau 57134b51dae9SMat Martineau if (l2cap_ertm_seq_in_queue(&chan->srej_q, txseq)) { 57144b51dae9SMat Martineau BT_DBG("Duplicate SREJ - txseq already stored"); 57154b51dae9SMat Martineau return L2CAP_TXSEQ_DUPLICATE_SREJ; 57164b51dae9SMat Martineau } 57174b51dae9SMat Martineau 57184b51dae9SMat Martineau if (l2cap_seq_list_contains(&chan->srej_list, txseq)) { 57194b51dae9SMat Martineau BT_DBG("Unexpected SREJ - not requested"); 57204b51dae9SMat Martineau return L2CAP_TXSEQ_UNEXPECTED_SREJ; 57214b51dae9SMat Martineau } 57224b51dae9SMat Martineau } 57234b51dae9SMat Martineau 57244b51dae9SMat Martineau if (chan->expected_tx_seq == txseq) { 57254b51dae9SMat Martineau if (__seq_offset(chan, txseq, chan->last_acked_seq) >= 57264b51dae9SMat Martineau chan->tx_win) { 57274b51dae9SMat Martineau BT_DBG("Invalid - txseq outside tx window"); 57284b51dae9SMat Martineau return L2CAP_TXSEQ_INVALID; 57294b51dae9SMat Martineau } else { 57304b51dae9SMat Martineau BT_DBG("Expected"); 57314b51dae9SMat Martineau return L2CAP_TXSEQ_EXPECTED; 57324b51dae9SMat Martineau } 57334b51dae9SMat Martineau } 57344b51dae9SMat Martineau 57354b51dae9SMat Martineau if (__seq_offset(chan, txseq, chan->last_acked_seq) < 57362d792818SGustavo Padovan __seq_offset(chan, chan->expected_tx_seq, chan->last_acked_seq)) { 57374b51dae9SMat Martineau BT_DBG("Duplicate - expected_tx_seq later than txseq"); 57384b51dae9SMat Martineau return L2CAP_TXSEQ_DUPLICATE; 57394b51dae9SMat Martineau } 57404b51dae9SMat Martineau 57414b51dae9SMat Martineau if (__seq_offset(chan, txseq, chan->last_acked_seq) >= chan->tx_win) { 57424b51dae9SMat Martineau /* A source of invalid packets is a "double poll" condition, 57434b51dae9SMat Martineau * where delays cause us to send multiple poll packets. If 57444b51dae9SMat Martineau * the remote stack receives and processes both polls, 57454b51dae9SMat Martineau * sequence numbers can wrap around in such a way that a 57464b51dae9SMat Martineau * resent frame has a sequence number that looks like new data 57474b51dae9SMat Martineau * with a sequence gap. This would trigger an erroneous SREJ 57484b51dae9SMat Martineau * request. 57494b51dae9SMat Martineau * 57504b51dae9SMat Martineau * Fortunately, this is impossible with a tx window that's 57514b51dae9SMat Martineau * less than half of the maximum sequence number, which allows 57524b51dae9SMat Martineau * invalid frames to be safely ignored. 57534b51dae9SMat Martineau * 57544b51dae9SMat Martineau * With tx window sizes greater than half of the tx window 57554b51dae9SMat Martineau * maximum, the frame is invalid and cannot be ignored. This 57564b51dae9SMat Martineau * causes a disconnect. 57574b51dae9SMat Martineau */ 57584b51dae9SMat Martineau 57594b51dae9SMat Martineau if (chan->tx_win <= ((chan->tx_win_max + 1) >> 1)) { 57604b51dae9SMat Martineau BT_DBG("Invalid/Ignore - txseq outside tx window"); 57614b51dae9SMat Martineau return L2CAP_TXSEQ_INVALID_IGNORE; 57624b51dae9SMat Martineau } else { 57634b51dae9SMat Martineau BT_DBG("Invalid - txseq outside tx window"); 57644b51dae9SMat Martineau return L2CAP_TXSEQ_INVALID; 57654b51dae9SMat Martineau } 57664b51dae9SMat Martineau } else { 57674b51dae9SMat Martineau BT_DBG("Unexpected - txseq indicates missing frames"); 57684b51dae9SMat Martineau return L2CAP_TXSEQ_UNEXPECTED; 57694b51dae9SMat Martineau } 57704b51dae9SMat Martineau } 57714b51dae9SMat Martineau 5772d2a7ac5dSMat Martineau static int l2cap_rx_state_recv(struct l2cap_chan *chan, 5773d2a7ac5dSMat Martineau struct l2cap_ctrl *control, 5774d2a7ac5dSMat Martineau struct sk_buff *skb, u8 event) 5775d2a7ac5dSMat Martineau { 5776d2a7ac5dSMat Martineau int err = 0; 5777d2a7ac5dSMat Martineau bool skb_in_use = 0; 5778d2a7ac5dSMat Martineau 5779d2a7ac5dSMat Martineau BT_DBG("chan %p, control %p, skb %p, event %d", chan, control, skb, 5780d2a7ac5dSMat Martineau event); 5781d2a7ac5dSMat Martineau 5782d2a7ac5dSMat Martineau switch (event) { 5783d2a7ac5dSMat Martineau case L2CAP_EV_RECV_IFRAME: 5784d2a7ac5dSMat Martineau switch (l2cap_classify_txseq(chan, control->txseq)) { 5785d2a7ac5dSMat Martineau case L2CAP_TXSEQ_EXPECTED: 5786d2a7ac5dSMat Martineau l2cap_pass_to_tx(chan, control); 5787d2a7ac5dSMat Martineau 5788d2a7ac5dSMat Martineau if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { 5789d2a7ac5dSMat Martineau BT_DBG("Busy, discarding expected seq %d", 5790d2a7ac5dSMat Martineau control->txseq); 5791d2a7ac5dSMat Martineau break; 5792d2a7ac5dSMat Martineau } 5793d2a7ac5dSMat Martineau 5794d2a7ac5dSMat Martineau chan->expected_tx_seq = __next_seq(chan, 5795d2a7ac5dSMat Martineau control->txseq); 5796d2a7ac5dSMat Martineau 5797d2a7ac5dSMat Martineau chan->buffer_seq = chan->expected_tx_seq; 5798d2a7ac5dSMat Martineau skb_in_use = 1; 5799d2a7ac5dSMat Martineau 5800d2a7ac5dSMat Martineau err = l2cap_reassemble_sdu(chan, skb, control); 5801d2a7ac5dSMat Martineau if (err) 5802d2a7ac5dSMat Martineau break; 5803d2a7ac5dSMat Martineau 5804d2a7ac5dSMat Martineau if (control->final) { 5805d2a7ac5dSMat Martineau if (!test_and_clear_bit(CONN_REJ_ACT, 5806d2a7ac5dSMat Martineau &chan->conn_state)) { 5807d2a7ac5dSMat Martineau control->final = 0; 5808d2a7ac5dSMat Martineau l2cap_retransmit_all(chan, control); 5809d2a7ac5dSMat Martineau l2cap_ertm_send(chan); 5810d2a7ac5dSMat Martineau } 5811d2a7ac5dSMat Martineau } 5812d2a7ac5dSMat Martineau 5813d2a7ac5dSMat Martineau if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) 5814d2a7ac5dSMat Martineau l2cap_send_ack(chan); 5815d2a7ac5dSMat Martineau break; 5816d2a7ac5dSMat Martineau case L2CAP_TXSEQ_UNEXPECTED: 5817d2a7ac5dSMat Martineau l2cap_pass_to_tx(chan, control); 5818d2a7ac5dSMat Martineau 5819d2a7ac5dSMat Martineau /* Can't issue SREJ frames in the local busy state. 5820d2a7ac5dSMat Martineau * Drop this frame, it will be seen as missing 5821d2a7ac5dSMat Martineau * when local busy is exited. 5822d2a7ac5dSMat Martineau */ 5823d2a7ac5dSMat Martineau if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { 5824d2a7ac5dSMat Martineau BT_DBG("Busy, discarding unexpected seq %d", 5825d2a7ac5dSMat Martineau control->txseq); 5826d2a7ac5dSMat Martineau break; 5827d2a7ac5dSMat Martineau } 5828d2a7ac5dSMat Martineau 5829d2a7ac5dSMat Martineau /* There was a gap in the sequence, so an SREJ 5830d2a7ac5dSMat Martineau * must be sent for each missing frame. The 5831d2a7ac5dSMat Martineau * current frame is stored for later use. 5832d2a7ac5dSMat Martineau */ 5833d2a7ac5dSMat Martineau skb_queue_tail(&chan->srej_q, skb); 5834d2a7ac5dSMat Martineau skb_in_use = 1; 5835d2a7ac5dSMat Martineau BT_DBG("Queued %p (queue len %d)", skb, 5836d2a7ac5dSMat Martineau skb_queue_len(&chan->srej_q)); 5837d2a7ac5dSMat Martineau 5838d2a7ac5dSMat Martineau clear_bit(CONN_SREJ_ACT, &chan->conn_state); 5839d2a7ac5dSMat Martineau l2cap_seq_list_clear(&chan->srej_list); 5840d2a7ac5dSMat Martineau l2cap_send_srej(chan, control->txseq); 5841d2a7ac5dSMat Martineau 5842d2a7ac5dSMat Martineau chan->rx_state = L2CAP_RX_STATE_SREJ_SENT; 5843d2a7ac5dSMat Martineau break; 5844d2a7ac5dSMat Martineau case L2CAP_TXSEQ_DUPLICATE: 5845d2a7ac5dSMat Martineau l2cap_pass_to_tx(chan, control); 5846d2a7ac5dSMat Martineau break; 5847d2a7ac5dSMat Martineau case L2CAP_TXSEQ_INVALID_IGNORE: 5848d2a7ac5dSMat Martineau break; 5849d2a7ac5dSMat Martineau case L2CAP_TXSEQ_INVALID: 5850d2a7ac5dSMat Martineau default: 58515e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 5852d2a7ac5dSMat Martineau break; 5853d2a7ac5dSMat Martineau } 5854d2a7ac5dSMat Martineau break; 5855d2a7ac5dSMat Martineau case L2CAP_EV_RECV_RR: 5856d2a7ac5dSMat Martineau l2cap_pass_to_tx(chan, control); 5857d2a7ac5dSMat Martineau if (control->final) { 5858d2a7ac5dSMat Martineau clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); 5859d2a7ac5dSMat Martineau 5860e6a3ee6eSMat Martineau if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state) && 5861e6a3ee6eSMat Martineau !__chan_is_moving(chan)) { 5862d2a7ac5dSMat Martineau control->final = 0; 5863d2a7ac5dSMat Martineau l2cap_retransmit_all(chan, control); 5864d2a7ac5dSMat Martineau } 5865d2a7ac5dSMat Martineau 5866d2a7ac5dSMat Martineau l2cap_ertm_send(chan); 5867d2a7ac5dSMat Martineau } else if (control->poll) { 5868d2a7ac5dSMat Martineau l2cap_send_i_or_rr_or_rnr(chan); 5869d2a7ac5dSMat Martineau } else { 5870d2a7ac5dSMat Martineau if (test_and_clear_bit(CONN_REMOTE_BUSY, 5871d2a7ac5dSMat Martineau &chan->conn_state) && 5872d2a7ac5dSMat Martineau chan->unacked_frames) 5873d2a7ac5dSMat Martineau __set_retrans_timer(chan); 5874d2a7ac5dSMat Martineau 5875d2a7ac5dSMat Martineau l2cap_ertm_send(chan); 5876d2a7ac5dSMat Martineau } 5877d2a7ac5dSMat Martineau break; 5878d2a7ac5dSMat Martineau case L2CAP_EV_RECV_RNR: 5879d2a7ac5dSMat Martineau set_bit(CONN_REMOTE_BUSY, &chan->conn_state); 5880d2a7ac5dSMat Martineau l2cap_pass_to_tx(chan, control); 5881d2a7ac5dSMat Martineau if (control && control->poll) { 5882d2a7ac5dSMat Martineau set_bit(CONN_SEND_FBIT, &chan->conn_state); 5883d2a7ac5dSMat Martineau l2cap_send_rr_or_rnr(chan, 0); 5884d2a7ac5dSMat Martineau } 5885d2a7ac5dSMat Martineau __clear_retrans_timer(chan); 5886d2a7ac5dSMat Martineau l2cap_seq_list_clear(&chan->retrans_list); 5887d2a7ac5dSMat Martineau break; 5888d2a7ac5dSMat Martineau case L2CAP_EV_RECV_REJ: 5889d2a7ac5dSMat Martineau l2cap_handle_rej(chan, control); 5890d2a7ac5dSMat Martineau break; 5891d2a7ac5dSMat Martineau case L2CAP_EV_RECV_SREJ: 5892d2a7ac5dSMat Martineau l2cap_handle_srej(chan, control); 5893d2a7ac5dSMat Martineau break; 5894d2a7ac5dSMat Martineau default: 5895d2a7ac5dSMat Martineau break; 5896d2a7ac5dSMat Martineau } 5897d2a7ac5dSMat Martineau 5898d2a7ac5dSMat Martineau if (skb && !skb_in_use) { 5899d2a7ac5dSMat Martineau BT_DBG("Freeing %p", skb); 5900d2a7ac5dSMat Martineau kfree_skb(skb); 5901d2a7ac5dSMat Martineau } 5902d2a7ac5dSMat Martineau 5903d2a7ac5dSMat Martineau return err; 5904d2a7ac5dSMat Martineau } 5905d2a7ac5dSMat Martineau 5906d2a7ac5dSMat Martineau static int l2cap_rx_state_srej_sent(struct l2cap_chan *chan, 5907d2a7ac5dSMat Martineau struct l2cap_ctrl *control, 5908d2a7ac5dSMat Martineau struct sk_buff *skb, u8 event) 5909d2a7ac5dSMat Martineau { 5910d2a7ac5dSMat Martineau int err = 0; 5911d2a7ac5dSMat Martineau u16 txseq = control->txseq; 5912d2a7ac5dSMat Martineau bool skb_in_use = 0; 5913d2a7ac5dSMat Martineau 5914d2a7ac5dSMat Martineau BT_DBG("chan %p, control %p, skb %p, event %d", chan, control, skb, 5915d2a7ac5dSMat Martineau event); 5916d2a7ac5dSMat Martineau 5917d2a7ac5dSMat Martineau switch (event) { 5918d2a7ac5dSMat Martineau case L2CAP_EV_RECV_IFRAME: 5919d2a7ac5dSMat Martineau switch (l2cap_classify_txseq(chan, txseq)) { 5920d2a7ac5dSMat Martineau case L2CAP_TXSEQ_EXPECTED: 5921d2a7ac5dSMat Martineau /* Keep frame for reassembly later */ 5922d2a7ac5dSMat Martineau l2cap_pass_to_tx(chan, control); 5923d2a7ac5dSMat Martineau skb_queue_tail(&chan->srej_q, skb); 5924d2a7ac5dSMat Martineau skb_in_use = 1; 5925d2a7ac5dSMat Martineau BT_DBG("Queued %p (queue len %d)", skb, 5926d2a7ac5dSMat Martineau skb_queue_len(&chan->srej_q)); 5927d2a7ac5dSMat Martineau 5928d2a7ac5dSMat Martineau chan->expected_tx_seq = __next_seq(chan, txseq); 5929d2a7ac5dSMat Martineau break; 5930d2a7ac5dSMat Martineau case L2CAP_TXSEQ_EXPECTED_SREJ: 5931d2a7ac5dSMat Martineau l2cap_seq_list_pop(&chan->srej_list); 5932d2a7ac5dSMat Martineau 5933d2a7ac5dSMat Martineau l2cap_pass_to_tx(chan, control); 5934d2a7ac5dSMat Martineau skb_queue_tail(&chan->srej_q, skb); 5935d2a7ac5dSMat Martineau skb_in_use = 1; 5936d2a7ac5dSMat Martineau BT_DBG("Queued %p (queue len %d)", skb, 5937d2a7ac5dSMat Martineau skb_queue_len(&chan->srej_q)); 5938d2a7ac5dSMat Martineau 5939d2a7ac5dSMat Martineau err = l2cap_rx_queued_iframes(chan); 5940d2a7ac5dSMat Martineau if (err) 5941d2a7ac5dSMat Martineau break; 5942d2a7ac5dSMat Martineau 5943d2a7ac5dSMat Martineau break; 5944d2a7ac5dSMat Martineau case L2CAP_TXSEQ_UNEXPECTED: 5945d2a7ac5dSMat Martineau /* Got a frame that can't be reassembled yet. 5946d2a7ac5dSMat Martineau * Save it for later, and send SREJs to cover 5947d2a7ac5dSMat Martineau * the missing frames. 5948d2a7ac5dSMat Martineau */ 5949d2a7ac5dSMat Martineau skb_queue_tail(&chan->srej_q, skb); 5950d2a7ac5dSMat Martineau skb_in_use = 1; 5951d2a7ac5dSMat Martineau BT_DBG("Queued %p (queue len %d)", skb, 5952d2a7ac5dSMat Martineau skb_queue_len(&chan->srej_q)); 5953d2a7ac5dSMat Martineau 5954d2a7ac5dSMat Martineau l2cap_pass_to_tx(chan, control); 5955d2a7ac5dSMat Martineau l2cap_send_srej(chan, control->txseq); 5956d2a7ac5dSMat Martineau break; 5957d2a7ac5dSMat Martineau case L2CAP_TXSEQ_UNEXPECTED_SREJ: 5958d2a7ac5dSMat Martineau /* This frame was requested with an SREJ, but 5959d2a7ac5dSMat Martineau * some expected retransmitted frames are 5960d2a7ac5dSMat Martineau * missing. Request retransmission of missing 5961d2a7ac5dSMat Martineau * SREJ'd frames. 5962d2a7ac5dSMat Martineau */ 5963d2a7ac5dSMat Martineau skb_queue_tail(&chan->srej_q, skb); 5964d2a7ac5dSMat Martineau skb_in_use = 1; 5965d2a7ac5dSMat Martineau BT_DBG("Queued %p (queue len %d)", skb, 5966d2a7ac5dSMat Martineau skb_queue_len(&chan->srej_q)); 5967d2a7ac5dSMat Martineau 5968d2a7ac5dSMat Martineau l2cap_pass_to_tx(chan, control); 5969d2a7ac5dSMat Martineau l2cap_send_srej_list(chan, control->txseq); 5970d2a7ac5dSMat Martineau break; 5971d2a7ac5dSMat Martineau case L2CAP_TXSEQ_DUPLICATE_SREJ: 5972d2a7ac5dSMat Martineau /* We've already queued this frame. Drop this copy. */ 5973d2a7ac5dSMat Martineau l2cap_pass_to_tx(chan, control); 5974d2a7ac5dSMat Martineau break; 5975d2a7ac5dSMat Martineau case L2CAP_TXSEQ_DUPLICATE: 5976d2a7ac5dSMat Martineau /* Expecting a later sequence number, so this frame 5977d2a7ac5dSMat Martineau * was already received. Ignore it completely. 5978d2a7ac5dSMat Martineau */ 5979d2a7ac5dSMat Martineau break; 5980d2a7ac5dSMat Martineau case L2CAP_TXSEQ_INVALID_IGNORE: 5981d2a7ac5dSMat Martineau break; 5982d2a7ac5dSMat Martineau case L2CAP_TXSEQ_INVALID: 5983d2a7ac5dSMat Martineau default: 59845e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 5985d2a7ac5dSMat Martineau break; 5986d2a7ac5dSMat Martineau } 5987d2a7ac5dSMat Martineau break; 5988d2a7ac5dSMat Martineau case L2CAP_EV_RECV_RR: 5989d2a7ac5dSMat Martineau l2cap_pass_to_tx(chan, control); 5990d2a7ac5dSMat Martineau if (control->final) { 5991d2a7ac5dSMat Martineau clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); 5992d2a7ac5dSMat Martineau 5993d2a7ac5dSMat Martineau if (!test_and_clear_bit(CONN_REJ_ACT, 5994d2a7ac5dSMat Martineau &chan->conn_state)) { 5995d2a7ac5dSMat Martineau control->final = 0; 5996d2a7ac5dSMat Martineau l2cap_retransmit_all(chan, control); 5997d2a7ac5dSMat Martineau } 5998d2a7ac5dSMat Martineau 5999d2a7ac5dSMat Martineau l2cap_ertm_send(chan); 6000d2a7ac5dSMat Martineau } else if (control->poll) { 6001d2a7ac5dSMat Martineau if (test_and_clear_bit(CONN_REMOTE_BUSY, 6002d2a7ac5dSMat Martineau &chan->conn_state) && 6003d2a7ac5dSMat Martineau chan->unacked_frames) { 6004d2a7ac5dSMat Martineau __set_retrans_timer(chan); 6005d2a7ac5dSMat Martineau } 6006d2a7ac5dSMat Martineau 6007d2a7ac5dSMat Martineau set_bit(CONN_SEND_FBIT, &chan->conn_state); 6008d2a7ac5dSMat Martineau l2cap_send_srej_tail(chan); 6009d2a7ac5dSMat Martineau } else { 6010d2a7ac5dSMat Martineau if (test_and_clear_bit(CONN_REMOTE_BUSY, 6011d2a7ac5dSMat Martineau &chan->conn_state) && 6012d2a7ac5dSMat Martineau chan->unacked_frames) 6013d2a7ac5dSMat Martineau __set_retrans_timer(chan); 6014d2a7ac5dSMat Martineau 6015d2a7ac5dSMat Martineau l2cap_send_ack(chan); 6016d2a7ac5dSMat Martineau } 6017d2a7ac5dSMat Martineau break; 6018d2a7ac5dSMat Martineau case L2CAP_EV_RECV_RNR: 6019d2a7ac5dSMat Martineau set_bit(CONN_REMOTE_BUSY, &chan->conn_state); 6020d2a7ac5dSMat Martineau l2cap_pass_to_tx(chan, control); 6021d2a7ac5dSMat Martineau if (control->poll) { 6022d2a7ac5dSMat Martineau l2cap_send_srej_tail(chan); 6023d2a7ac5dSMat Martineau } else { 6024d2a7ac5dSMat Martineau struct l2cap_ctrl rr_control; 6025d2a7ac5dSMat Martineau memset(&rr_control, 0, sizeof(rr_control)); 6026d2a7ac5dSMat Martineau rr_control.sframe = 1; 6027d2a7ac5dSMat Martineau rr_control.super = L2CAP_SUPER_RR; 6028d2a7ac5dSMat Martineau rr_control.reqseq = chan->buffer_seq; 6029d2a7ac5dSMat Martineau l2cap_send_sframe(chan, &rr_control); 6030d2a7ac5dSMat Martineau } 6031d2a7ac5dSMat Martineau 6032d2a7ac5dSMat Martineau break; 6033d2a7ac5dSMat Martineau case L2CAP_EV_RECV_REJ: 6034d2a7ac5dSMat Martineau l2cap_handle_rej(chan, control); 6035d2a7ac5dSMat Martineau break; 6036d2a7ac5dSMat Martineau case L2CAP_EV_RECV_SREJ: 6037d2a7ac5dSMat Martineau l2cap_handle_srej(chan, control); 6038d2a7ac5dSMat Martineau break; 6039d2a7ac5dSMat Martineau } 6040d2a7ac5dSMat Martineau 6041d2a7ac5dSMat Martineau if (skb && !skb_in_use) { 6042d2a7ac5dSMat Martineau BT_DBG("Freeing %p", skb); 6043d2a7ac5dSMat Martineau kfree_skb(skb); 6044d2a7ac5dSMat Martineau } 6045d2a7ac5dSMat Martineau 6046d2a7ac5dSMat Martineau return err; 6047d2a7ac5dSMat Martineau } 6048d2a7ac5dSMat Martineau 604932b32735SMat Martineau static int l2cap_finish_move(struct l2cap_chan *chan) 605032b32735SMat Martineau { 605132b32735SMat Martineau BT_DBG("chan %p", chan); 605232b32735SMat Martineau 605332b32735SMat Martineau chan->rx_state = L2CAP_RX_STATE_RECV; 605432b32735SMat Martineau 605532b32735SMat Martineau if (chan->hs_hcon) 605632b32735SMat Martineau chan->conn->mtu = chan->hs_hcon->hdev->block_mtu; 605732b32735SMat Martineau else 605832b32735SMat Martineau chan->conn->mtu = chan->conn->hcon->hdev->acl_mtu; 605932b32735SMat Martineau 606032b32735SMat Martineau return l2cap_resegment(chan); 606132b32735SMat Martineau } 606232b32735SMat Martineau 606332b32735SMat Martineau static int l2cap_rx_state_wait_p(struct l2cap_chan *chan, 606432b32735SMat Martineau struct l2cap_ctrl *control, 606532b32735SMat Martineau struct sk_buff *skb, u8 event) 606632b32735SMat Martineau { 606732b32735SMat Martineau int err; 606832b32735SMat Martineau 606932b32735SMat Martineau BT_DBG("chan %p, control %p, skb %p, event %d", chan, control, skb, 607032b32735SMat Martineau event); 607132b32735SMat Martineau 607232b32735SMat Martineau if (!control->poll) 607332b32735SMat Martineau return -EPROTO; 607432b32735SMat Martineau 607532b32735SMat Martineau l2cap_process_reqseq(chan, control->reqseq); 607632b32735SMat Martineau 607732b32735SMat Martineau if (!skb_queue_empty(&chan->tx_q)) 607832b32735SMat Martineau chan->tx_send_head = skb_peek(&chan->tx_q); 607932b32735SMat Martineau else 608032b32735SMat Martineau chan->tx_send_head = NULL; 608132b32735SMat Martineau 608232b32735SMat Martineau /* Rewind next_tx_seq to the point expected 608332b32735SMat Martineau * by the receiver. 608432b32735SMat Martineau */ 608532b32735SMat Martineau chan->next_tx_seq = control->reqseq; 608632b32735SMat Martineau chan->unacked_frames = 0; 608732b32735SMat Martineau 608832b32735SMat Martineau err = l2cap_finish_move(chan); 608932b32735SMat Martineau if (err) 609032b32735SMat Martineau return err; 609132b32735SMat Martineau 609232b32735SMat Martineau set_bit(CONN_SEND_FBIT, &chan->conn_state); 609332b32735SMat Martineau l2cap_send_i_or_rr_or_rnr(chan); 609432b32735SMat Martineau 609532b32735SMat Martineau if (event == L2CAP_EV_RECV_IFRAME) 609632b32735SMat Martineau return -EPROTO; 609732b32735SMat Martineau 609832b32735SMat Martineau return l2cap_rx_state_recv(chan, control, NULL, event); 609932b32735SMat Martineau } 610032b32735SMat Martineau 610132b32735SMat Martineau static int l2cap_rx_state_wait_f(struct l2cap_chan *chan, 610232b32735SMat Martineau struct l2cap_ctrl *control, 610332b32735SMat Martineau struct sk_buff *skb, u8 event) 610432b32735SMat Martineau { 610532b32735SMat Martineau int err; 610632b32735SMat Martineau 610732b32735SMat Martineau if (!control->final) 610832b32735SMat Martineau return -EPROTO; 610932b32735SMat Martineau 611032b32735SMat Martineau clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); 611132b32735SMat Martineau 611232b32735SMat Martineau chan->rx_state = L2CAP_RX_STATE_RECV; 611332b32735SMat Martineau l2cap_process_reqseq(chan, control->reqseq); 611432b32735SMat Martineau 611532b32735SMat Martineau if (!skb_queue_empty(&chan->tx_q)) 611632b32735SMat Martineau chan->tx_send_head = skb_peek(&chan->tx_q); 611732b32735SMat Martineau else 611832b32735SMat Martineau chan->tx_send_head = NULL; 611932b32735SMat Martineau 612032b32735SMat Martineau /* Rewind next_tx_seq to the point expected 612132b32735SMat Martineau * by the receiver. 612232b32735SMat Martineau */ 612332b32735SMat Martineau chan->next_tx_seq = control->reqseq; 612432b32735SMat Martineau chan->unacked_frames = 0; 612532b32735SMat Martineau 612632b32735SMat Martineau if (chan->hs_hcon) 612732b32735SMat Martineau chan->conn->mtu = chan->hs_hcon->hdev->block_mtu; 612832b32735SMat Martineau else 612932b32735SMat Martineau chan->conn->mtu = chan->conn->hcon->hdev->acl_mtu; 613032b32735SMat Martineau 613132b32735SMat Martineau err = l2cap_resegment(chan); 613232b32735SMat Martineau 613332b32735SMat Martineau if (!err) 613432b32735SMat Martineau err = l2cap_rx_state_recv(chan, control, skb, event); 613532b32735SMat Martineau 613632b32735SMat Martineau return err; 613732b32735SMat Martineau } 613832b32735SMat Martineau 6139d2a7ac5dSMat Martineau static bool __valid_reqseq(struct l2cap_chan *chan, u16 reqseq) 6140d2a7ac5dSMat Martineau { 6141d2a7ac5dSMat Martineau /* Make sure reqseq is for a packet that has been sent but not acked */ 6142d2a7ac5dSMat Martineau u16 unacked; 6143d2a7ac5dSMat Martineau 6144d2a7ac5dSMat Martineau unacked = __seq_offset(chan, chan->next_tx_seq, chan->expected_ack_seq); 6145d2a7ac5dSMat Martineau return __seq_offset(chan, chan->next_tx_seq, reqseq) <= unacked; 6146d2a7ac5dSMat Martineau } 6147d2a7ac5dSMat Martineau 6148cec8ab6eSMat Martineau static int l2cap_rx(struct l2cap_chan *chan, struct l2cap_ctrl *control, 6149cec8ab6eSMat Martineau struct sk_buff *skb, u8 event) 61500a708f8fSGustavo F. Padovan { 6151d2a7ac5dSMat Martineau int err = 0; 6152d2a7ac5dSMat Martineau 6153d2a7ac5dSMat Martineau BT_DBG("chan %p, control %p, skb %p, event %d, state %d", chan, 6154d2a7ac5dSMat Martineau control, skb, event, chan->rx_state); 6155d2a7ac5dSMat Martineau 6156d2a7ac5dSMat Martineau if (__valid_reqseq(chan, control->reqseq)) { 6157d2a7ac5dSMat Martineau switch (chan->rx_state) { 6158d2a7ac5dSMat Martineau case L2CAP_RX_STATE_RECV: 6159d2a7ac5dSMat Martineau err = l2cap_rx_state_recv(chan, control, skb, event); 6160d2a7ac5dSMat Martineau break; 6161d2a7ac5dSMat Martineau case L2CAP_RX_STATE_SREJ_SENT: 6162d2a7ac5dSMat Martineau err = l2cap_rx_state_srej_sent(chan, control, skb, 6163d2a7ac5dSMat Martineau event); 6164d2a7ac5dSMat Martineau break; 616532b32735SMat Martineau case L2CAP_RX_STATE_WAIT_P: 616632b32735SMat Martineau err = l2cap_rx_state_wait_p(chan, control, skb, event); 616732b32735SMat Martineau break; 616832b32735SMat Martineau case L2CAP_RX_STATE_WAIT_F: 616932b32735SMat Martineau err = l2cap_rx_state_wait_f(chan, control, skb, event); 617032b32735SMat Martineau break; 6171d2a7ac5dSMat Martineau default: 6172d2a7ac5dSMat Martineau /* shut it down */ 6173d2a7ac5dSMat Martineau break; 6174d2a7ac5dSMat Martineau } 6175d2a7ac5dSMat Martineau } else { 6176d2a7ac5dSMat Martineau BT_DBG("Invalid reqseq %d (next_tx_seq %d, expected_ack_seq %d", 6177d2a7ac5dSMat Martineau control->reqseq, chan->next_tx_seq, 6178d2a7ac5dSMat Martineau chan->expected_ack_seq); 61795e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 6180d2a7ac5dSMat Martineau } 6181d2a7ac5dSMat Martineau 6182d2a7ac5dSMat Martineau return err; 6183cec8ab6eSMat Martineau } 6184cec8ab6eSMat Martineau 6185cec8ab6eSMat Martineau static int l2cap_stream_rx(struct l2cap_chan *chan, struct l2cap_ctrl *control, 6186cec8ab6eSMat Martineau struct sk_buff *skb) 6187cec8ab6eSMat Martineau { 61884b51dae9SMat Martineau int err = 0; 61894b51dae9SMat Martineau 61904b51dae9SMat Martineau BT_DBG("chan %p, control %p, skb %p, state %d", chan, control, skb, 61914b51dae9SMat Martineau chan->rx_state); 61924b51dae9SMat Martineau 61934b51dae9SMat Martineau if (l2cap_classify_txseq(chan, control->txseq) == 61944b51dae9SMat Martineau L2CAP_TXSEQ_EXPECTED) { 61954b51dae9SMat Martineau l2cap_pass_to_tx(chan, control); 61964b51dae9SMat Martineau 61974b51dae9SMat Martineau BT_DBG("buffer_seq %d->%d", chan->buffer_seq, 61984b51dae9SMat Martineau __next_seq(chan, chan->buffer_seq)); 61994b51dae9SMat Martineau 62004b51dae9SMat Martineau chan->buffer_seq = __next_seq(chan, chan->buffer_seq); 62014b51dae9SMat Martineau 62024b51dae9SMat Martineau l2cap_reassemble_sdu(chan, skb, control); 62034b51dae9SMat Martineau } else { 62044b51dae9SMat Martineau if (chan->sdu) { 62054b51dae9SMat Martineau kfree_skb(chan->sdu); 62064b51dae9SMat Martineau chan->sdu = NULL; 62074b51dae9SMat Martineau } 62084b51dae9SMat Martineau chan->sdu_last_frag = NULL; 62094b51dae9SMat Martineau chan->sdu_len = 0; 62104b51dae9SMat Martineau 62114b51dae9SMat Martineau if (skb) { 62124b51dae9SMat Martineau BT_DBG("Freeing %p", skb); 62134b51dae9SMat Martineau kfree_skb(skb); 62144b51dae9SMat Martineau } 62154b51dae9SMat Martineau } 62164b51dae9SMat Martineau 62174b51dae9SMat Martineau chan->last_acked_seq = control->txseq; 62184b51dae9SMat Martineau chan->expected_tx_seq = __next_seq(chan, control->txseq); 62194b51dae9SMat Martineau 62204b51dae9SMat Martineau return err; 6221cec8ab6eSMat Martineau } 6222cec8ab6eSMat Martineau 6223cec8ab6eSMat Martineau static int l2cap_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb) 6224cec8ab6eSMat Martineau { 6225cec8ab6eSMat Martineau struct l2cap_ctrl *control = &bt_cb(skb)->control; 6226cec8ab6eSMat Martineau u16 len; 6227cec8ab6eSMat Martineau u8 event; 62280a708f8fSGustavo F. Padovan 6229b76bbd66SMat Martineau __unpack_control(chan, skb); 6230b76bbd66SMat Martineau 62310a708f8fSGustavo F. Padovan len = skb->len; 62320a708f8fSGustavo F. Padovan 62330a708f8fSGustavo F. Padovan /* 62340a708f8fSGustavo F. Padovan * We can just drop the corrupted I-frame here. 62350a708f8fSGustavo F. Padovan * Receiver will miss it and start proper recovery 6236cec8ab6eSMat Martineau * procedures and ask for retransmission. 62370a708f8fSGustavo F. Padovan */ 623847d1ec61SGustavo F. Padovan if (l2cap_check_fcs(chan, skb)) 62390a708f8fSGustavo F. Padovan goto drop; 62400a708f8fSGustavo F. Padovan 6241cec8ab6eSMat Martineau if (!control->sframe && control->sar == L2CAP_SAR_START) 624203a51213SAndrei Emeltchenko len -= L2CAP_SDULEN_SIZE; 62430a708f8fSGustavo F. Padovan 624447d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) 624503a51213SAndrei Emeltchenko len -= L2CAP_FCS_SIZE; 62460a708f8fSGustavo F. Padovan 624747d1ec61SGustavo F. Padovan if (len > chan->mps) { 62485e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 62490a708f8fSGustavo F. Padovan goto drop; 62500a708f8fSGustavo F. Padovan } 62510a708f8fSGustavo F. Padovan 6252cec8ab6eSMat Martineau if (!control->sframe) { 6253cec8ab6eSMat Martineau int err; 62540a708f8fSGustavo F. Padovan 6255cec8ab6eSMat Martineau BT_DBG("iframe sar %d, reqseq %d, final %d, txseq %d", 6256cec8ab6eSMat Martineau control->sar, control->reqseq, control->final, 6257cec8ab6eSMat Martineau control->txseq); 6258836be934SAndrei Emeltchenko 6259cec8ab6eSMat Martineau /* Validate F-bit - F=0 always valid, F=1 only 6260cec8ab6eSMat Martineau * valid in TX WAIT_F 6261cec8ab6eSMat Martineau */ 6262cec8ab6eSMat Martineau if (control->final && chan->tx_state != L2CAP_TX_STATE_WAIT_F) 62630a708f8fSGustavo F. Padovan goto drop; 62640a708f8fSGustavo F. Padovan 6265cec8ab6eSMat Martineau if (chan->mode != L2CAP_MODE_STREAMING) { 6266cec8ab6eSMat Martineau event = L2CAP_EV_RECV_IFRAME; 6267cec8ab6eSMat Martineau err = l2cap_rx(chan, control, skb, event); 62680a708f8fSGustavo F. Padovan } else { 6269cec8ab6eSMat Martineau err = l2cap_stream_rx(chan, control, skb); 6270cec8ab6eSMat Martineau } 6271cec8ab6eSMat Martineau 6272cec8ab6eSMat Martineau if (err) 62735e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 6274cec8ab6eSMat Martineau } else { 6275cec8ab6eSMat Martineau const u8 rx_func_to_event[4] = { 6276cec8ab6eSMat Martineau L2CAP_EV_RECV_RR, L2CAP_EV_RECV_REJ, 6277cec8ab6eSMat Martineau L2CAP_EV_RECV_RNR, L2CAP_EV_RECV_SREJ 6278cec8ab6eSMat Martineau }; 6279cec8ab6eSMat Martineau 6280cec8ab6eSMat Martineau /* Only I-frames are expected in streaming mode */ 6281cec8ab6eSMat Martineau if (chan->mode == L2CAP_MODE_STREAMING) 6282cec8ab6eSMat Martineau goto drop; 6283cec8ab6eSMat Martineau 6284cec8ab6eSMat Martineau BT_DBG("sframe reqseq %d, final %d, poll %d, super %d", 6285cec8ab6eSMat Martineau control->reqseq, control->final, control->poll, 6286cec8ab6eSMat Martineau control->super); 6287cec8ab6eSMat Martineau 62880a708f8fSGustavo F. Padovan if (len != 0) { 62891bb166e6SAndrei Emeltchenko BT_ERR("Trailing bytes: %d in sframe", len); 62905e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 62910a708f8fSGustavo F. Padovan goto drop; 62920a708f8fSGustavo F. Padovan } 62930a708f8fSGustavo F. Padovan 6294cec8ab6eSMat Martineau /* Validate F and P bits */ 6295cec8ab6eSMat Martineau if (control->final && (control->poll || 6296cec8ab6eSMat Martineau chan->tx_state != L2CAP_TX_STATE_WAIT_F)) 6297cec8ab6eSMat Martineau goto drop; 6298cec8ab6eSMat Martineau 6299cec8ab6eSMat Martineau event = rx_func_to_event[control->super]; 6300cec8ab6eSMat Martineau if (l2cap_rx(chan, control, skb, event)) 63015e4e3972SAndrei Emeltchenko l2cap_send_disconn_req(chan, ECONNRESET); 63020a708f8fSGustavo F. Padovan } 63030a708f8fSGustavo F. Padovan 63040a708f8fSGustavo F. Padovan return 0; 63050a708f8fSGustavo F. Padovan 63060a708f8fSGustavo F. Padovan drop: 63070a708f8fSGustavo F. Padovan kfree_skb(skb); 63080a708f8fSGustavo F. Padovan return 0; 63090a708f8fSGustavo F. Padovan } 63100a708f8fSGustavo F. Padovan 631113ca56e0SAndrei Emeltchenko static void l2cap_data_channel(struct l2cap_conn *conn, u16 cid, 631213ca56e0SAndrei Emeltchenko struct sk_buff *skb) 63130a708f8fSGustavo F. Padovan { 631448454079SGustavo F. Padovan struct l2cap_chan *chan; 63150a708f8fSGustavo F. Padovan 6316baa7e1faSGustavo F. Padovan chan = l2cap_get_chan_by_scid(conn, cid); 631748454079SGustavo F. Padovan if (!chan) { 631897e8e89dSAndrei Emeltchenko if (cid == L2CAP_CID_A2MP) { 631997e8e89dSAndrei Emeltchenko chan = a2mp_channel_create(conn, skb); 632097e8e89dSAndrei Emeltchenko if (!chan) { 632197e8e89dSAndrei Emeltchenko kfree_skb(skb); 632213ca56e0SAndrei Emeltchenko return; 632397e8e89dSAndrei Emeltchenko } 632497e8e89dSAndrei Emeltchenko 632597e8e89dSAndrei Emeltchenko l2cap_chan_lock(chan); 632697e8e89dSAndrei Emeltchenko } else { 63270a708f8fSGustavo F. Padovan BT_DBG("unknown cid 0x%4.4x", cid); 63286be36555SAndrei Emeltchenko /* Drop packet and return */ 63293379013bSDan Carpenter kfree_skb(skb); 633013ca56e0SAndrei Emeltchenko return; 63310a708f8fSGustavo F. Padovan } 633297e8e89dSAndrei Emeltchenko } 63330a708f8fSGustavo F. Padovan 633449208c9cSGustavo F. Padovan BT_DBG("chan %p, len %d", chan, skb->len); 63350a708f8fSGustavo F. Padovan 633689bc500eSGustavo F. Padovan if (chan->state != BT_CONNECTED) 63370a708f8fSGustavo F. Padovan goto drop; 63380a708f8fSGustavo F. Padovan 63390c1bc5c6SGustavo F. Padovan switch (chan->mode) { 63400a708f8fSGustavo F. Padovan case L2CAP_MODE_BASIC: 63410a708f8fSGustavo F. Padovan /* If socket recv buffers overflows we drop data here 63420a708f8fSGustavo F. Padovan * which is *bad* because L2CAP has to be reliable. 63430a708f8fSGustavo F. Padovan * But we don't have any other choice. L2CAP doesn't 63440a708f8fSGustavo F. Padovan * provide flow control mechanism. */ 63450a708f8fSGustavo F. Padovan 63460c1bc5c6SGustavo F. Padovan if (chan->imtu < skb->len) 63470a708f8fSGustavo F. Padovan goto drop; 63480a708f8fSGustavo F. Padovan 634980b98027SGustavo Padovan if (!chan->ops->recv(chan, skb)) 63500a708f8fSGustavo F. Padovan goto done; 63510a708f8fSGustavo F. Padovan break; 63520a708f8fSGustavo F. Padovan 63530a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 63540a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 6355cec8ab6eSMat Martineau l2cap_data_rcv(chan, skb); 63560a708f8fSGustavo F. Padovan goto done; 63570a708f8fSGustavo F. Padovan 63580a708f8fSGustavo F. Padovan default: 63590c1bc5c6SGustavo F. Padovan BT_DBG("chan %p: bad mode 0x%2.2x", chan, chan->mode); 63600a708f8fSGustavo F. Padovan break; 63610a708f8fSGustavo F. Padovan } 63620a708f8fSGustavo F. Padovan 63630a708f8fSGustavo F. Padovan drop: 63640a708f8fSGustavo F. Padovan kfree_skb(skb); 63650a708f8fSGustavo F. Padovan 63660a708f8fSGustavo F. Padovan done: 63676be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 63680a708f8fSGustavo F. Padovan } 63690a708f8fSGustavo F. Padovan 637084104b24SAndrei Emeltchenko static void l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, 637184104b24SAndrei Emeltchenko struct sk_buff *skb) 63720a708f8fSGustavo F. Padovan { 637323691d75SGustavo F. Padovan struct l2cap_chan *chan; 63740a708f8fSGustavo F. Padovan 6375c2287681SIdo Yariv chan = l2cap_global_chan_by_psm(0, psm, conn->src, conn->dst); 637623691d75SGustavo F. Padovan if (!chan) 63770a708f8fSGustavo F. Padovan goto drop; 63780a708f8fSGustavo F. Padovan 63795b4cedaaSAndrei Emeltchenko BT_DBG("chan %p, len %d", chan, skb->len); 63800a708f8fSGustavo F. Padovan 638189bc500eSGustavo F. Padovan if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) 63820a708f8fSGustavo F. Padovan goto drop; 63830a708f8fSGustavo F. Padovan 6384e13e21dcSVinicius Costa Gomes if (chan->imtu < skb->len) 63850a708f8fSGustavo F. Padovan goto drop; 63860a708f8fSGustavo F. Padovan 638780b98027SGustavo Padovan if (!chan->ops->recv(chan, skb)) 638884104b24SAndrei Emeltchenko return; 63890a708f8fSGustavo F. Padovan 63900a708f8fSGustavo F. Padovan drop: 63910a708f8fSGustavo F. Padovan kfree_skb(skb); 63920a708f8fSGustavo F. Padovan } 63930a708f8fSGustavo F. Padovan 639472f78356SMarcel Holtmann static void l2cap_att_channel(struct l2cap_conn *conn, 6395d9b88702SAndrei Emeltchenko struct sk_buff *skb) 63969f69bda6SGustavo F. Padovan { 639723691d75SGustavo F. Padovan struct l2cap_chan *chan; 63989f69bda6SGustavo F. Padovan 6399af1c0134SJohan Hedberg chan = l2cap_global_chan_by_scid(BT_CONNECTED, L2CAP_CID_ATT, 640072f78356SMarcel Holtmann conn->src, conn->dst); 640123691d75SGustavo F. Padovan if (!chan) 64029f69bda6SGustavo F. Padovan goto drop; 64039f69bda6SGustavo F. Padovan 64045b4cedaaSAndrei Emeltchenko BT_DBG("chan %p, len %d", chan, skb->len); 64059f69bda6SGustavo F. Padovan 6406e13e21dcSVinicius Costa Gomes if (chan->imtu < skb->len) 64079f69bda6SGustavo F. Padovan goto drop; 64089f69bda6SGustavo F. Padovan 640980b98027SGustavo Padovan if (!chan->ops->recv(chan, skb)) 64106810fca7SAndrei Emeltchenko return; 64119f69bda6SGustavo F. Padovan 64129f69bda6SGustavo F. Padovan drop: 64139f69bda6SGustavo F. Padovan kfree_skb(skb); 64149f69bda6SGustavo F. Padovan } 64159f69bda6SGustavo F. Padovan 64160a708f8fSGustavo F. Padovan static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) 64170a708f8fSGustavo F. Padovan { 64180a708f8fSGustavo F. Padovan struct l2cap_hdr *lh = (void *) skb->data; 64190a708f8fSGustavo F. Padovan u16 cid, len; 64200a708f8fSGustavo F. Padovan __le16 psm; 64210a708f8fSGustavo F. Padovan 64220a708f8fSGustavo F. Padovan skb_pull(skb, L2CAP_HDR_SIZE); 64230a708f8fSGustavo F. Padovan cid = __le16_to_cpu(lh->cid); 64240a708f8fSGustavo F. Padovan len = __le16_to_cpu(lh->len); 64250a708f8fSGustavo F. Padovan 64260a708f8fSGustavo F. Padovan if (len != skb->len) { 64270a708f8fSGustavo F. Padovan kfree_skb(skb); 64280a708f8fSGustavo F. Padovan return; 64290a708f8fSGustavo F. Padovan } 64300a708f8fSGustavo F. Padovan 64310a708f8fSGustavo F. Padovan BT_DBG("len %d, cid 0x%4.4x", len, cid); 64320a708f8fSGustavo F. Padovan 64330a708f8fSGustavo F. Padovan switch (cid) { 64343300d9a9SClaudio Takahasi case L2CAP_CID_LE_SIGNALING: 6435c5623556SJohan Hedberg l2cap_le_sig_channel(conn, skb); 6436c5623556SJohan Hedberg break; 64370a708f8fSGustavo F. Padovan case L2CAP_CID_SIGNALING: 64380a708f8fSGustavo F. Padovan l2cap_sig_channel(conn, skb); 64390a708f8fSGustavo F. Padovan break; 64400a708f8fSGustavo F. Padovan 64410a708f8fSGustavo F. Padovan case L2CAP_CID_CONN_LESS: 6442097db76cSAndrei Emeltchenko psm = get_unaligned((__le16 *) skb->data); 64430181a70fSAndrei Emeltchenko skb_pull(skb, L2CAP_PSMLEN_SIZE); 64440a708f8fSGustavo F. Padovan l2cap_conless_channel(conn, psm, skb); 64450a708f8fSGustavo F. Padovan break; 64460a708f8fSGustavo F. Padovan 6447073d1cf3SJohan Hedberg case L2CAP_CID_ATT: 644872f78356SMarcel Holtmann l2cap_att_channel(conn, skb); 64499f69bda6SGustavo F. Padovan break; 64509f69bda6SGustavo F. Padovan 6451b501d6a1SAnderson Briglia case L2CAP_CID_SMP: 6452b501d6a1SAnderson Briglia if (smp_sig_channel(conn, skb)) 6453b501d6a1SAnderson Briglia l2cap_conn_del(conn->hcon, EACCES); 6454b501d6a1SAnderson Briglia break; 6455b501d6a1SAnderson Briglia 64560a708f8fSGustavo F. Padovan default: 64570a708f8fSGustavo F. Padovan l2cap_data_channel(conn, cid, skb); 64580a708f8fSGustavo F. Padovan break; 64590a708f8fSGustavo F. Padovan } 64600a708f8fSGustavo F. Padovan } 64610a708f8fSGustavo F. Padovan 64620a708f8fSGustavo F. Padovan /* ---- L2CAP interface with lower layer (HCI) ---- */ 64630a708f8fSGustavo F. Padovan 6464686ebf28SUlisses Furquim int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr) 64650a708f8fSGustavo F. Padovan { 64660a708f8fSGustavo F. Padovan int exact = 0, lm1 = 0, lm2 = 0; 646723691d75SGustavo F. Padovan struct l2cap_chan *c; 64680a708f8fSGustavo F. Padovan 64696ed93dc6SAndrei Emeltchenko BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr); 64700a708f8fSGustavo F. Padovan 64710a708f8fSGustavo F. Padovan /* Find listening sockets and check their link_mode */ 647223691d75SGustavo F. Padovan read_lock(&chan_list_lock); 647323691d75SGustavo F. Padovan list_for_each_entry(c, &chan_list, global_l) { 647423691d75SGustavo F. Padovan struct sock *sk = c->sk; 64754343478fSGustavo F. Padovan 647689bc500eSGustavo F. Padovan if (c->state != BT_LISTEN) 64770a708f8fSGustavo F. Padovan continue; 64780a708f8fSGustavo F. Padovan 64790a708f8fSGustavo F. Padovan if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { 64800a708f8fSGustavo F. Padovan lm1 |= HCI_LM_ACCEPT; 648143bd0f32SAndrei Emeltchenko if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) 64820a708f8fSGustavo F. Padovan lm1 |= HCI_LM_MASTER; 64830a708f8fSGustavo F. Padovan exact++; 64840a708f8fSGustavo F. Padovan } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { 64850a708f8fSGustavo F. Padovan lm2 |= HCI_LM_ACCEPT; 648643bd0f32SAndrei Emeltchenko if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) 64870a708f8fSGustavo F. Padovan lm2 |= HCI_LM_MASTER; 64880a708f8fSGustavo F. Padovan } 64890a708f8fSGustavo F. Padovan } 649023691d75SGustavo F. Padovan read_unlock(&chan_list_lock); 64910a708f8fSGustavo F. Padovan 64920a708f8fSGustavo F. Padovan return exact ? lm1 : lm2; 64930a708f8fSGustavo F. Padovan } 64940a708f8fSGustavo F. Padovan 64959e664631SAndrei Emeltchenko void l2cap_connect_cfm(struct hci_conn *hcon, u8 status) 64960a708f8fSGustavo F. Padovan { 64970a708f8fSGustavo F. Padovan struct l2cap_conn *conn; 64980a708f8fSGustavo F. Padovan 64996ed93dc6SAndrei Emeltchenko BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status); 65000a708f8fSGustavo F. Padovan 65010a708f8fSGustavo F. Padovan if (!status) { 6502baf43251SClaudio Takahasi conn = l2cap_conn_add(hcon); 65030a708f8fSGustavo F. Padovan if (conn) 65040a708f8fSGustavo F. Padovan l2cap_conn_ready(conn); 6505ba6fc317SAndrei Emeltchenko } else { 6506e175072fSJoe Perches l2cap_conn_del(hcon, bt_to_errno(status)); 6507ba6fc317SAndrei Emeltchenko } 65080a708f8fSGustavo F. Padovan } 65090a708f8fSGustavo F. Padovan 6510686ebf28SUlisses Furquim int l2cap_disconn_ind(struct hci_conn *hcon) 65110a708f8fSGustavo F. Padovan { 65120a708f8fSGustavo F. Padovan struct l2cap_conn *conn = hcon->l2cap_data; 65130a708f8fSGustavo F. Padovan 65140a708f8fSGustavo F. Padovan BT_DBG("hcon %p", hcon); 65150a708f8fSGustavo F. Padovan 6516686ebf28SUlisses Furquim if (!conn) 65179f5a0d7bSAndrei Emeltchenko return HCI_ERROR_REMOTE_USER_TERM; 65180a708f8fSGustavo F. Padovan return conn->disc_reason; 65190a708f8fSGustavo F. Padovan } 65200a708f8fSGustavo F. Padovan 65219e664631SAndrei Emeltchenko void l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) 65220a708f8fSGustavo F. Padovan { 65230a708f8fSGustavo F. Padovan BT_DBG("hcon %p reason %d", hcon, reason); 65240a708f8fSGustavo F. Padovan 6525e175072fSJoe Perches l2cap_conn_del(hcon, bt_to_errno(reason)); 65260a708f8fSGustavo F. Padovan } 65270a708f8fSGustavo F. Padovan 65284343478fSGustavo F. Padovan static inline void l2cap_check_encryption(struct l2cap_chan *chan, u8 encrypt) 65290a708f8fSGustavo F. Padovan { 6530715ec005SGustavo F. Padovan if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) 65310a708f8fSGustavo F. Padovan return; 65320a708f8fSGustavo F. Padovan 65330a708f8fSGustavo F. Padovan if (encrypt == 0x00) { 65344343478fSGustavo F. Padovan if (chan->sec_level == BT_SECURITY_MEDIUM) { 6535ba13ccd9SMarcel Holtmann __set_chan_timer(chan, L2CAP_ENC_TIMEOUT); 65364343478fSGustavo F. Padovan } else if (chan->sec_level == BT_SECURITY_HIGH) 65370f852724SGustavo F. Padovan l2cap_chan_close(chan, ECONNREFUSED); 65380a708f8fSGustavo F. Padovan } else { 65394343478fSGustavo F. Padovan if (chan->sec_level == BT_SECURITY_MEDIUM) 6540c9b66675SGustavo F. Padovan __clear_chan_timer(chan); 65410a708f8fSGustavo F. Padovan } 65420a708f8fSGustavo F. Padovan } 65430a708f8fSGustavo F. Padovan 6544686ebf28SUlisses Furquim int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) 65450a708f8fSGustavo F. Padovan { 65460a708f8fSGustavo F. Padovan struct l2cap_conn *conn = hcon->l2cap_data; 654748454079SGustavo F. Padovan struct l2cap_chan *chan; 65480a708f8fSGustavo F. Padovan 65490a708f8fSGustavo F. Padovan if (!conn) 65500a708f8fSGustavo F. Padovan return 0; 65510a708f8fSGustavo F. Padovan 655289d8b407SAndrei Emeltchenko BT_DBG("conn %p status 0x%2.2x encrypt %u", conn, status, encrypt); 65530a708f8fSGustavo F. Padovan 6554160dc6acSVinicius Costa Gomes if (hcon->type == LE_LINK) { 655535d4adccSHemant Gupta if (!status && encrypt) 6556160dc6acSVinicius Costa Gomes smp_distribute_keys(conn, 0); 655717cd3f37SUlisses Furquim cancel_delayed_work(&conn->security_timer); 6558160dc6acSVinicius Costa Gomes } 6559160dc6acSVinicius Costa Gomes 65603df91ea2SAndrei Emeltchenko mutex_lock(&conn->chan_lock); 65610a708f8fSGustavo F. Padovan 65623df91ea2SAndrei Emeltchenko list_for_each_entry(chan, &conn->chan_l, list) { 65636be36555SAndrei Emeltchenko l2cap_chan_lock(chan); 65640a708f8fSGustavo F. Padovan 656589d8b407SAndrei Emeltchenko BT_DBG("chan %p scid 0x%4.4x state %s", chan, chan->scid, 656689d8b407SAndrei Emeltchenko state_to_string(chan->state)); 6567f1cb9af5SVinicius Costa Gomes 656878eb2f98SAndrei Emeltchenko if (chan->chan_type == L2CAP_CHAN_CONN_FIX_A2MP) { 656978eb2f98SAndrei Emeltchenko l2cap_chan_unlock(chan); 657078eb2f98SAndrei Emeltchenko continue; 657178eb2f98SAndrei Emeltchenko } 657278eb2f98SAndrei Emeltchenko 6573073d1cf3SJohan Hedberg if (chan->scid == L2CAP_CID_ATT) { 6574f1cb9af5SVinicius Costa Gomes if (!status && encrypt) { 6575f1cb9af5SVinicius Costa Gomes chan->sec_level = hcon->sec_level; 6576cf4cd009SAndrei Emeltchenko l2cap_chan_ready(chan); 6577f1cb9af5SVinicius Costa Gomes } 6578f1cb9af5SVinicius Costa Gomes 65796be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 6580f1cb9af5SVinicius Costa Gomes continue; 6581f1cb9af5SVinicius Costa Gomes } 6582f1cb9af5SVinicius Costa Gomes 658396eff46eSAndrei Emeltchenko if (!__l2cap_no_conn_pending(chan)) { 65846be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 65850a708f8fSGustavo F. Padovan continue; 65860a708f8fSGustavo F. Padovan } 65870a708f8fSGustavo F. Padovan 658889bc500eSGustavo F. Padovan if (!status && (chan->state == BT_CONNECTED || 658989bc500eSGustavo F. Padovan chan->state == BT_CONFIG)) { 6590a7d7723aSGustavo Padovan struct sock *sk = chan->sk; 6591a7d7723aSGustavo Padovan 6592c5daa683SGustavo Padovan clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); 6593a7d7723aSGustavo Padovan sk->sk_state_change(sk); 6594a7d7723aSGustavo Padovan 65954343478fSGustavo F. Padovan l2cap_check_encryption(chan, encrypt); 65966be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 65970a708f8fSGustavo F. Padovan continue; 65980a708f8fSGustavo F. Padovan } 65990a708f8fSGustavo F. Padovan 660089bc500eSGustavo F. Padovan if (chan->state == BT_CONNECT) { 66010a708f8fSGustavo F. Padovan if (!status) { 660293c3e8f5SAndrei Emeltchenko l2cap_start_connection(chan); 66030a708f8fSGustavo F. Padovan } else { 6604ba13ccd9SMarcel Holtmann __set_chan_timer(chan, L2CAP_DISC_TIMEOUT); 66050a708f8fSGustavo F. Padovan } 660689bc500eSGustavo F. Padovan } else if (chan->state == BT_CONNECT2) { 66076be36555SAndrei Emeltchenko struct sock *sk = chan->sk; 66080a708f8fSGustavo F. Padovan struct l2cap_conn_rsp rsp; 6609df3c3931SJohan Hedberg __u16 res, stat; 66100a708f8fSGustavo F. Padovan 66116be36555SAndrei Emeltchenko lock_sock(sk); 66126be36555SAndrei Emeltchenko 66130a708f8fSGustavo F. Padovan if (!status) { 6614c5daa683SGustavo Padovan if (test_bit(BT_SK_DEFER_SETUP, 6615c5daa683SGustavo Padovan &bt_sk(sk)->flags)) { 6616df3c3931SJohan Hedberg res = L2CAP_CR_PEND; 6617df3c3931SJohan Hedberg stat = L2CAP_CS_AUTHOR_PEND; 66182dc4e510SGustavo Padovan chan->ops->defer(chan); 6619df3c3931SJohan Hedberg } else { 66200e587be7SAndrei Emeltchenko __l2cap_state_change(chan, BT_CONFIG); 6621df3c3931SJohan Hedberg res = L2CAP_CR_SUCCESS; 6622df3c3931SJohan Hedberg stat = L2CAP_CS_NO_INFO; 6623df3c3931SJohan Hedberg } 66240a708f8fSGustavo F. Padovan } else { 66250e587be7SAndrei Emeltchenko __l2cap_state_change(chan, BT_DISCONN); 6626ba13ccd9SMarcel Holtmann __set_chan_timer(chan, L2CAP_DISC_TIMEOUT); 6627df3c3931SJohan Hedberg res = L2CAP_CR_SEC_BLOCK; 6628df3c3931SJohan Hedberg stat = L2CAP_CS_NO_INFO; 66290a708f8fSGustavo F. Padovan } 66300a708f8fSGustavo F. Padovan 66316be36555SAndrei Emeltchenko release_sock(sk); 66326be36555SAndrei Emeltchenko 6633fe4128e0SGustavo F. Padovan rsp.scid = cpu_to_le16(chan->dcid); 6634fe4128e0SGustavo F. Padovan rsp.dcid = cpu_to_le16(chan->scid); 6635df3c3931SJohan Hedberg rsp.result = cpu_to_le16(res); 6636df3c3931SJohan Hedberg rsp.status = cpu_to_le16(stat); 6637fc7f8a7eSGustavo F. Padovan l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, 6638fc7f8a7eSGustavo F. Padovan sizeof(rsp), &rsp); 66392d369359SMat Martineau 66402d369359SMat Martineau if (!test_bit(CONF_REQ_SENT, &chan->conf_state) && 66412d369359SMat Martineau res == L2CAP_CR_SUCCESS) { 66422d369359SMat Martineau char buf[128]; 66432d369359SMat Martineau set_bit(CONF_REQ_SENT, &chan->conf_state); 66442d369359SMat Martineau l2cap_send_cmd(conn, l2cap_get_ident(conn), 66452d369359SMat Martineau L2CAP_CONF_REQ, 66462d369359SMat Martineau l2cap_build_conf_req(chan, buf), 66472d369359SMat Martineau buf); 66482d369359SMat Martineau chan->num_conf_req++; 66492d369359SMat Martineau } 66500a708f8fSGustavo F. Padovan } 66510a708f8fSGustavo F. Padovan 66526be36555SAndrei Emeltchenko l2cap_chan_unlock(chan); 66530a708f8fSGustavo F. Padovan } 66540a708f8fSGustavo F. Padovan 66553df91ea2SAndrei Emeltchenko mutex_unlock(&conn->chan_lock); 66560a708f8fSGustavo F. Padovan 66570a708f8fSGustavo F. Padovan return 0; 66580a708f8fSGustavo F. Padovan } 66590a708f8fSGustavo F. Padovan 6660686ebf28SUlisses Furquim int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) 66610a708f8fSGustavo F. Padovan { 66620a708f8fSGustavo F. Padovan struct l2cap_conn *conn = hcon->l2cap_data; 6663d73a0988SAndrei Emeltchenko struct l2cap_hdr *hdr; 6664d73a0988SAndrei Emeltchenko int len; 66650a708f8fSGustavo F. Padovan 66661d13a254SAndrei Emeltchenko /* For AMP controller do not create l2cap conn */ 66671d13a254SAndrei Emeltchenko if (!conn && hcon->hdev->dev_type != HCI_BREDR) 66681d13a254SAndrei Emeltchenko goto drop; 66690a708f8fSGustavo F. Padovan 66700a708f8fSGustavo F. Padovan if (!conn) 6671baf43251SClaudio Takahasi conn = l2cap_conn_add(hcon); 66720a708f8fSGustavo F. Padovan 66730a708f8fSGustavo F. Padovan if (!conn) 66740a708f8fSGustavo F. Padovan goto drop; 66750a708f8fSGustavo F. Padovan 66760a708f8fSGustavo F. Padovan BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); 66770a708f8fSGustavo F. Padovan 6678d73a0988SAndrei Emeltchenko switch (flags) { 6679d73a0988SAndrei Emeltchenko case ACL_START: 6680d73a0988SAndrei Emeltchenko case ACL_START_NO_FLUSH: 6681d73a0988SAndrei Emeltchenko case ACL_COMPLETE: 66820a708f8fSGustavo F. Padovan if (conn->rx_len) { 66830a708f8fSGustavo F. Padovan BT_ERR("Unexpected start frame (len %d)", skb->len); 66840a708f8fSGustavo F. Padovan kfree_skb(conn->rx_skb); 66850a708f8fSGustavo F. Padovan conn->rx_skb = NULL; 66860a708f8fSGustavo F. Padovan conn->rx_len = 0; 66870a708f8fSGustavo F. Padovan l2cap_conn_unreliable(conn, ECOMM); 66880a708f8fSGustavo F. Padovan } 66890a708f8fSGustavo F. Padovan 66900a708f8fSGustavo F. Padovan /* Start fragment always begin with Basic L2CAP header */ 66910a708f8fSGustavo F. Padovan if (skb->len < L2CAP_HDR_SIZE) { 66920a708f8fSGustavo F. Padovan BT_ERR("Frame is too short (len %d)", skb->len); 66930a708f8fSGustavo F. Padovan l2cap_conn_unreliable(conn, ECOMM); 66940a708f8fSGustavo F. Padovan goto drop; 66950a708f8fSGustavo F. Padovan } 66960a708f8fSGustavo F. Padovan 66970a708f8fSGustavo F. Padovan hdr = (struct l2cap_hdr *) skb->data; 66980a708f8fSGustavo F. Padovan len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; 66990a708f8fSGustavo F. Padovan 67000a708f8fSGustavo F. Padovan if (len == skb->len) { 67010a708f8fSGustavo F. Padovan /* Complete frame received */ 67020a708f8fSGustavo F. Padovan l2cap_recv_frame(conn, skb); 67030a708f8fSGustavo F. Padovan return 0; 67040a708f8fSGustavo F. Padovan } 67050a708f8fSGustavo F. Padovan 67060a708f8fSGustavo F. Padovan BT_DBG("Start: total len %d, frag len %d", len, skb->len); 67070a708f8fSGustavo F. Padovan 67080a708f8fSGustavo F. Padovan if (skb->len > len) { 67090a708f8fSGustavo F. Padovan BT_ERR("Frame is too long (len %d, expected len %d)", 67100a708f8fSGustavo F. Padovan skb->len, len); 67110a708f8fSGustavo F. Padovan l2cap_conn_unreliable(conn, ECOMM); 67120a708f8fSGustavo F. Padovan goto drop; 67130a708f8fSGustavo F. Padovan } 67140a708f8fSGustavo F. Padovan 67150a708f8fSGustavo F. Padovan /* Allocate skb for the complete frame (with header) */ 67168bcde1f2SGustavo Padovan conn->rx_skb = bt_skb_alloc(len, GFP_KERNEL); 67170a708f8fSGustavo F. Padovan if (!conn->rx_skb) 67180a708f8fSGustavo F. Padovan goto drop; 67190a708f8fSGustavo F. Padovan 67200a708f8fSGustavo F. Padovan skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), 67210a708f8fSGustavo F. Padovan skb->len); 67220a708f8fSGustavo F. Padovan conn->rx_len = len - skb->len; 6723d73a0988SAndrei Emeltchenko break; 6724d73a0988SAndrei Emeltchenko 6725d73a0988SAndrei Emeltchenko case ACL_CONT: 67260a708f8fSGustavo F. Padovan BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); 67270a708f8fSGustavo F. Padovan 67280a708f8fSGustavo F. Padovan if (!conn->rx_len) { 67290a708f8fSGustavo F. Padovan BT_ERR("Unexpected continuation frame (len %d)", skb->len); 67300a708f8fSGustavo F. Padovan l2cap_conn_unreliable(conn, ECOMM); 67310a708f8fSGustavo F. Padovan goto drop; 67320a708f8fSGustavo F. Padovan } 67330a708f8fSGustavo F. Padovan 67340a708f8fSGustavo F. Padovan if (skb->len > conn->rx_len) { 67350a708f8fSGustavo F. Padovan BT_ERR("Fragment is too long (len %d, expected %d)", 67360a708f8fSGustavo F. Padovan skb->len, conn->rx_len); 67370a708f8fSGustavo F. Padovan kfree_skb(conn->rx_skb); 67380a708f8fSGustavo F. Padovan conn->rx_skb = NULL; 67390a708f8fSGustavo F. Padovan conn->rx_len = 0; 67400a708f8fSGustavo F. Padovan l2cap_conn_unreliable(conn, ECOMM); 67410a708f8fSGustavo F. Padovan goto drop; 67420a708f8fSGustavo F. Padovan } 67430a708f8fSGustavo F. Padovan 67440a708f8fSGustavo F. Padovan skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), 67450a708f8fSGustavo F. Padovan skb->len); 67460a708f8fSGustavo F. Padovan conn->rx_len -= skb->len; 67470a708f8fSGustavo F. Padovan 67480a708f8fSGustavo F. Padovan if (!conn->rx_len) { 67490a708f8fSGustavo F. Padovan /* Complete frame received */ 67500a708f8fSGustavo F. Padovan l2cap_recv_frame(conn, conn->rx_skb); 67510a708f8fSGustavo F. Padovan conn->rx_skb = NULL; 67520a708f8fSGustavo F. Padovan } 6753d73a0988SAndrei Emeltchenko break; 67540a708f8fSGustavo F. Padovan } 67550a708f8fSGustavo F. Padovan 67560a708f8fSGustavo F. Padovan drop: 67570a708f8fSGustavo F. Padovan kfree_skb(skb); 67580a708f8fSGustavo F. Padovan return 0; 67590a708f8fSGustavo F. Padovan } 67600a708f8fSGustavo F. Padovan 67610a708f8fSGustavo F. Padovan static int l2cap_debugfs_show(struct seq_file *f, void *p) 67620a708f8fSGustavo F. Padovan { 676323691d75SGustavo F. Padovan struct l2cap_chan *c; 67640a708f8fSGustavo F. Padovan 6765333055f2SGustavo F. Padovan read_lock(&chan_list_lock); 67660a708f8fSGustavo F. Padovan 676723691d75SGustavo F. Padovan list_for_each_entry(c, &chan_list, global_l) { 676823691d75SGustavo F. Padovan struct sock *sk = c->sk; 67690a708f8fSGustavo F. Padovan 6770fcb73338SAndrei Emeltchenko seq_printf(f, "%pMR %pMR %d %d 0x%4.4x 0x%4.4x %d %d %d %d\n", 6771fcb73338SAndrei Emeltchenko &bt_sk(sk)->src, &bt_sk(sk)->dst, 677289bc500eSGustavo F. Padovan c->state, __le16_to_cpu(c->psm), 677323691d75SGustavo F. Padovan c->scid, c->dcid, c->imtu, c->omtu, 677423691d75SGustavo F. Padovan c->sec_level, c->mode); 67750a708f8fSGustavo F. Padovan } 67760a708f8fSGustavo F. Padovan 6777333055f2SGustavo F. Padovan read_unlock(&chan_list_lock); 67780a708f8fSGustavo F. Padovan 67790a708f8fSGustavo F. Padovan return 0; 67800a708f8fSGustavo F. Padovan } 67810a708f8fSGustavo F. Padovan 67820a708f8fSGustavo F. Padovan static int l2cap_debugfs_open(struct inode *inode, struct file *file) 67830a708f8fSGustavo F. Padovan { 67840a708f8fSGustavo F. Padovan return single_open(file, l2cap_debugfs_show, inode->i_private); 67850a708f8fSGustavo F. Padovan } 67860a708f8fSGustavo F. Padovan 67870a708f8fSGustavo F. Padovan static const struct file_operations l2cap_debugfs_fops = { 67880a708f8fSGustavo F. Padovan .open = l2cap_debugfs_open, 67890a708f8fSGustavo F. Padovan .read = seq_read, 67900a708f8fSGustavo F. Padovan .llseek = seq_lseek, 67910a708f8fSGustavo F. Padovan .release = single_release, 67920a708f8fSGustavo F. Padovan }; 67930a708f8fSGustavo F. Padovan 67940a708f8fSGustavo F. Padovan static struct dentry *l2cap_debugfs; 67950a708f8fSGustavo F. Padovan 679664274518SGustavo F. Padovan int __init l2cap_init(void) 67970a708f8fSGustavo F. Padovan { 67980a708f8fSGustavo F. Padovan int err; 67990a708f8fSGustavo F. Padovan 6800bb58f747SGustavo F. Padovan err = l2cap_init_sockets(); 68010a708f8fSGustavo F. Padovan if (err < 0) 68020a708f8fSGustavo F. Padovan return err; 68030a708f8fSGustavo F. Padovan 68040a708f8fSGustavo F. Padovan if (bt_debugfs) { 68052d792818SGustavo Padovan l2cap_debugfs = debugfs_create_file("l2cap", 0444, bt_debugfs, 68062d792818SGustavo Padovan NULL, &l2cap_debugfs_fops); 68070a708f8fSGustavo F. Padovan if (!l2cap_debugfs) 68080a708f8fSGustavo F. Padovan BT_ERR("Failed to create L2CAP debug file"); 68090a708f8fSGustavo F. Padovan } 68100a708f8fSGustavo F. Padovan 68110a708f8fSGustavo F. Padovan return 0; 68120a708f8fSGustavo F. Padovan } 68130a708f8fSGustavo F. Padovan 681464274518SGustavo F. Padovan void l2cap_exit(void) 68150a708f8fSGustavo F. Padovan { 68160a708f8fSGustavo F. Padovan debugfs_remove(l2cap_debugfs); 6817bb58f747SGustavo F. Padovan l2cap_cleanup_sockets(); 68180a708f8fSGustavo F. Padovan } 68190a708f8fSGustavo F. Padovan 68200a708f8fSGustavo F. Padovan module_param(disable_ertm, bool, 0644); 68210a708f8fSGustavo F. Padovan MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode"); 6822