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 70a708f8fSGustavo F. Padovan 80a708f8fSGustavo F. Padovan Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> 90a708f8fSGustavo F. Padovan 100a708f8fSGustavo F. Padovan This program is free software; you can redistribute it and/or modify 110a708f8fSGustavo F. Padovan it under the terms of the GNU General Public License version 2 as 120a708f8fSGustavo F. Padovan published by the Free Software Foundation; 130a708f8fSGustavo F. Padovan 140a708f8fSGustavo F. Padovan THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 150a708f8fSGustavo F. Padovan OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 160a708f8fSGustavo F. Padovan FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 170a708f8fSGustavo F. Padovan IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 180a708f8fSGustavo F. Padovan CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 190a708f8fSGustavo F. Padovan WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 200a708f8fSGustavo F. Padovan ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 210a708f8fSGustavo F. Padovan OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 220a708f8fSGustavo F. Padovan 230a708f8fSGustavo F. Padovan ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 240a708f8fSGustavo F. Padovan COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 250a708f8fSGustavo F. Padovan SOFTWARE IS DISCLAIMED. 260a708f8fSGustavo F. Padovan */ 270a708f8fSGustavo F. Padovan 28bb58f747SGustavo F. Padovan /* Bluetooth L2CAP core. */ 290a708f8fSGustavo F. Padovan 300a708f8fSGustavo F. Padovan #include <linux/module.h> 310a708f8fSGustavo F. Padovan 320a708f8fSGustavo F. Padovan #include <linux/types.h> 330a708f8fSGustavo F. Padovan #include <linux/capability.h> 340a708f8fSGustavo F. Padovan #include <linux/errno.h> 350a708f8fSGustavo F. Padovan #include <linux/kernel.h> 360a708f8fSGustavo F. Padovan #include <linux/sched.h> 370a708f8fSGustavo F. Padovan #include <linux/slab.h> 380a708f8fSGustavo F. Padovan #include <linux/poll.h> 390a708f8fSGustavo F. Padovan #include <linux/fcntl.h> 400a708f8fSGustavo F. Padovan #include <linux/init.h> 410a708f8fSGustavo F. Padovan #include <linux/interrupt.h> 420a708f8fSGustavo F. Padovan #include <linux/socket.h> 430a708f8fSGustavo F. Padovan #include <linux/skbuff.h> 440a708f8fSGustavo F. Padovan #include <linux/list.h> 450a708f8fSGustavo F. Padovan #include <linux/device.h> 460a708f8fSGustavo F. Padovan #include <linux/debugfs.h> 470a708f8fSGustavo F. Padovan #include <linux/seq_file.h> 480a708f8fSGustavo F. Padovan #include <linux/uaccess.h> 490a708f8fSGustavo F. Padovan #include <linux/crc16.h> 500a708f8fSGustavo F. Padovan #include <net/sock.h> 510a708f8fSGustavo F. Padovan 520a708f8fSGustavo F. Padovan #include <asm/system.h> 530a708f8fSGustavo F. Padovan #include <asm/unaligned.h> 540a708f8fSGustavo F. Padovan 550a708f8fSGustavo F. Padovan #include <net/bluetooth/bluetooth.h> 560a708f8fSGustavo F. Padovan #include <net/bluetooth/hci_core.h> 570a708f8fSGustavo F. Padovan #include <net/bluetooth/l2cap.h> 58b501d6a1SAnderson Briglia #include <net/bluetooth/smp.h> 590a708f8fSGustavo F. Padovan 60eb939922SRusty Russell bool disable_ertm; 610a708f8fSGustavo F. Padovan 620a708f8fSGustavo F. Padovan static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; 6350a147cdSMat Martineau static u8 l2cap_fixed_chan[8] = { L2CAP_FC_L2CAP, }; 640a708f8fSGustavo F. Padovan 65b5ad8b7fSJohannes Berg static LIST_HEAD(chan_list); 66b5ad8b7fSJohannes Berg static DEFINE_RWLOCK(chan_list_lock); 670a708f8fSGustavo F. Padovan 680a708f8fSGustavo F. Padovan static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, 690a708f8fSGustavo F. Padovan u8 code, u8 ident, u16 dlen, void *data); 704519de9aSGustavo F. Padovan static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, 714519de9aSGustavo F. Padovan void *data); 72710f9b0aSGustavo F. Padovan static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data); 734519de9aSGustavo F. Padovan static void l2cap_send_disconn_req(struct l2cap_conn *conn, 744519de9aSGustavo F. Padovan struct l2cap_chan *chan, int err); 750a708f8fSGustavo F. Padovan 760a708f8fSGustavo F. Padovan /* ---- L2CAP channels ---- */ 7771ba0e56SGustavo F. Padovan 78baa7e1faSGustavo F. Padovan static struct l2cap_chan *__l2cap_get_chan_by_dcid(struct l2cap_conn *conn, u16 cid) 790a708f8fSGustavo F. Padovan { 803d57dc68SGustavo F. Padovan struct l2cap_chan *c, *r = NULL; 81baa7e1faSGustavo F. Padovan 823d57dc68SGustavo F. Padovan rcu_read_lock(); 833d57dc68SGustavo F. Padovan 843d57dc68SGustavo F. Padovan list_for_each_entry_rcu(c, &conn->chan_l, list) { 853d57dc68SGustavo F. Padovan if (c->dcid == cid) { 863d57dc68SGustavo F. Padovan r = c; 873d57dc68SGustavo F. Padovan break; 880a708f8fSGustavo F. Padovan } 893d57dc68SGustavo F. Padovan } 903d57dc68SGustavo F. Padovan 913d57dc68SGustavo F. Padovan rcu_read_unlock(); 923d57dc68SGustavo F. Padovan return r; 93baa7e1faSGustavo F. Padovan } 940a708f8fSGustavo F. Padovan 95baa7e1faSGustavo F. Padovan static struct l2cap_chan *__l2cap_get_chan_by_scid(struct l2cap_conn *conn, u16 cid) 960a708f8fSGustavo F. Padovan { 973d57dc68SGustavo F. Padovan struct l2cap_chan *c, *r = NULL; 98baa7e1faSGustavo F. Padovan 993d57dc68SGustavo F. Padovan rcu_read_lock(); 1003d57dc68SGustavo F. Padovan 1013d57dc68SGustavo F. Padovan list_for_each_entry_rcu(c, &conn->chan_l, list) { 1023d57dc68SGustavo F. Padovan if (c->scid == cid) { 1033d57dc68SGustavo F. Padovan r = c; 1043d57dc68SGustavo F. Padovan break; 1050a708f8fSGustavo F. Padovan } 1063d57dc68SGustavo F. Padovan } 1073d57dc68SGustavo F. Padovan 1083d57dc68SGustavo F. Padovan rcu_read_unlock(); 1093d57dc68SGustavo F. Padovan return r; 110baa7e1faSGustavo F. Padovan } 1110a708f8fSGustavo F. Padovan 1120a708f8fSGustavo F. Padovan /* Find channel with given SCID. 1130a708f8fSGustavo F. Padovan * Returns locked socket */ 114baa7e1faSGustavo F. Padovan static struct l2cap_chan *l2cap_get_chan_by_scid(struct l2cap_conn *conn, u16 cid) 1150a708f8fSGustavo F. Padovan { 11648454079SGustavo F. Padovan struct l2cap_chan *c; 117baa7e1faSGustavo F. Padovan 118baa7e1faSGustavo F. Padovan c = __l2cap_get_chan_by_scid(conn, cid); 11948454079SGustavo F. Padovan if (c) 120aa2ac881SGustavo F. Padovan lock_sock(c->sk); 12148454079SGustavo F. Padovan return c; 1220a708f8fSGustavo F. Padovan } 1230a708f8fSGustavo F. Padovan 124baa7e1faSGustavo F. Padovan static struct l2cap_chan *__l2cap_get_chan_by_ident(struct l2cap_conn *conn, u8 ident) 1250a708f8fSGustavo F. Padovan { 1263d57dc68SGustavo F. Padovan struct l2cap_chan *c, *r = NULL; 127baa7e1faSGustavo F. Padovan 1283d57dc68SGustavo F. Padovan rcu_read_lock(); 1293d57dc68SGustavo F. Padovan 1303d57dc68SGustavo F. Padovan list_for_each_entry_rcu(c, &conn->chan_l, list) { 1313d57dc68SGustavo F. Padovan if (c->ident == ident) { 1323d57dc68SGustavo F. Padovan r = c; 1333d57dc68SGustavo F. Padovan break; 1340a708f8fSGustavo F. Padovan } 1353d57dc68SGustavo F. Padovan } 1363d57dc68SGustavo F. Padovan 1373d57dc68SGustavo F. Padovan rcu_read_unlock(); 1383d57dc68SGustavo F. Padovan return r; 139baa7e1faSGustavo F. Padovan } 1400a708f8fSGustavo F. Padovan 141baa7e1faSGustavo F. Padovan static inline struct l2cap_chan *l2cap_get_chan_by_ident(struct l2cap_conn *conn, u8 ident) 1420a708f8fSGustavo F. Padovan { 14348454079SGustavo F. Padovan struct l2cap_chan *c; 144baa7e1faSGustavo F. Padovan 145baa7e1faSGustavo F. Padovan c = __l2cap_get_chan_by_ident(conn, ident); 14648454079SGustavo F. Padovan if (c) 147aa2ac881SGustavo F. Padovan lock_sock(c->sk); 14848454079SGustavo F. Padovan return c; 1490a708f8fSGustavo F. Padovan } 1500a708f8fSGustavo F. Padovan 15123691d75SGustavo F. Padovan static struct l2cap_chan *__l2cap_global_chan_by_addr(__le16 psm, bdaddr_t *src) 1529e4425ffSGustavo F. Padovan { 15323691d75SGustavo F. Padovan struct l2cap_chan *c; 1549e4425ffSGustavo F. Padovan 15523691d75SGustavo F. Padovan list_for_each_entry(c, &chan_list, global_l) { 15623691d75SGustavo F. Padovan if (c->sport == psm && !bacmp(&bt_sk(c->sk)->src, src)) 15723691d75SGustavo F. Padovan return c; 1589e4425ffSGustavo F. Padovan } 159250938cbSSzymon Janc return NULL; 160250938cbSSzymon Janc } 1619e4425ffSGustavo F. Padovan 1629e4425ffSGustavo F. Padovan int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm) 1639e4425ffSGustavo F. Padovan { 16473b2ec18SGustavo F. Padovan int err; 16573b2ec18SGustavo F. Padovan 166333055f2SGustavo F. Padovan write_lock(&chan_list_lock); 1679e4425ffSGustavo F. Padovan 16823691d75SGustavo F. Padovan if (psm && __l2cap_global_chan_by_addr(psm, src)) { 16973b2ec18SGustavo F. Padovan err = -EADDRINUSE; 17073b2ec18SGustavo F. Padovan goto done; 1719e4425ffSGustavo F. Padovan } 1729e4425ffSGustavo F. Padovan 17373b2ec18SGustavo F. Padovan if (psm) { 1749e4425ffSGustavo F. Padovan chan->psm = psm; 1759e4425ffSGustavo F. Padovan chan->sport = psm; 17673b2ec18SGustavo F. Padovan err = 0; 17773b2ec18SGustavo F. Padovan } else { 17873b2ec18SGustavo F. Padovan u16 p; 1799e4425ffSGustavo F. Padovan 18073b2ec18SGustavo F. Padovan err = -EINVAL; 18173b2ec18SGustavo F. Padovan for (p = 0x1001; p < 0x1100; p += 2) 18223691d75SGustavo F. Padovan if (!__l2cap_global_chan_by_addr(cpu_to_le16(p), src)) { 18373b2ec18SGustavo F. Padovan chan->psm = cpu_to_le16(p); 18473b2ec18SGustavo F. Padovan chan->sport = cpu_to_le16(p); 18573b2ec18SGustavo F. Padovan err = 0; 18673b2ec18SGustavo F. Padovan break; 18773b2ec18SGustavo F. Padovan } 18873b2ec18SGustavo F. Padovan } 18973b2ec18SGustavo F. Padovan 19073b2ec18SGustavo F. Padovan done: 191333055f2SGustavo F. Padovan write_unlock(&chan_list_lock); 19273b2ec18SGustavo F. Padovan return err; 1939e4425ffSGustavo F. Padovan } 1949e4425ffSGustavo F. Padovan 1959e4425ffSGustavo F. Padovan int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid) 1969e4425ffSGustavo F. Padovan { 197333055f2SGustavo F. Padovan write_lock(&chan_list_lock); 1989e4425ffSGustavo F. Padovan 1999e4425ffSGustavo F. Padovan chan->scid = scid; 2009e4425ffSGustavo F. Padovan 201333055f2SGustavo F. Padovan write_unlock(&chan_list_lock); 2029e4425ffSGustavo F. Padovan 2039e4425ffSGustavo F. Padovan return 0; 2049e4425ffSGustavo F. Padovan } 2059e4425ffSGustavo F. Padovan 206baa7e1faSGustavo F. Padovan static u16 l2cap_alloc_cid(struct l2cap_conn *conn) 2070a708f8fSGustavo F. Padovan { 2080a708f8fSGustavo F. Padovan u16 cid = L2CAP_CID_DYN_START; 2090a708f8fSGustavo F. Padovan 2100a708f8fSGustavo F. Padovan for (; cid < L2CAP_CID_DYN_END; cid++) { 211baa7e1faSGustavo F. Padovan if (!__l2cap_get_chan_by_scid(conn, cid)) 2120a708f8fSGustavo F. Padovan return cid; 2130a708f8fSGustavo F. Padovan } 2140a708f8fSGustavo F. Padovan 2150a708f8fSGustavo F. Padovan return 0; 2160a708f8fSGustavo F. Padovan } 2170a708f8fSGustavo F. Padovan 218badaaa00SGustavo F. Padovan static char *state_to_string(int state) 219badaaa00SGustavo F. Padovan { 220badaaa00SGustavo F. Padovan switch(state) { 221badaaa00SGustavo F. Padovan case BT_CONNECTED: 222badaaa00SGustavo F. Padovan return "BT_CONNECTED"; 223badaaa00SGustavo F. Padovan case BT_OPEN: 224badaaa00SGustavo F. Padovan return "BT_OPEN"; 225badaaa00SGustavo F. Padovan case BT_BOUND: 226badaaa00SGustavo F. Padovan return "BT_BOUND"; 227badaaa00SGustavo F. Padovan case BT_LISTEN: 228badaaa00SGustavo F. Padovan return "BT_LISTEN"; 229badaaa00SGustavo F. Padovan case BT_CONNECT: 230badaaa00SGustavo F. Padovan return "BT_CONNECT"; 231badaaa00SGustavo F. Padovan case BT_CONNECT2: 232badaaa00SGustavo F. Padovan return "BT_CONNECT2"; 233badaaa00SGustavo F. Padovan case BT_CONFIG: 234badaaa00SGustavo F. Padovan return "BT_CONFIG"; 235badaaa00SGustavo F. Padovan case BT_DISCONN: 236badaaa00SGustavo F. Padovan return "BT_DISCONN"; 237badaaa00SGustavo F. Padovan case BT_CLOSED: 238badaaa00SGustavo F. Padovan return "BT_CLOSED"; 239badaaa00SGustavo F. Padovan } 240badaaa00SGustavo F. Padovan 241badaaa00SGustavo F. Padovan return "invalid state"; 242badaaa00SGustavo F. Padovan } 243badaaa00SGustavo F. Padovan 24489bc500eSGustavo F. Padovan static void l2cap_state_change(struct l2cap_chan *chan, int state) 24589bc500eSGustavo F. Padovan { 246badaaa00SGustavo F. Padovan BT_DBG("%p %s -> %s", chan, state_to_string(chan->state), 247badaaa00SGustavo F. Padovan state_to_string(state)); 248badaaa00SGustavo F. Padovan 24989bc500eSGustavo F. Padovan chan->state = state; 25089bc500eSGustavo F. Padovan chan->ops->state_change(chan->data, state); 25189bc500eSGustavo F. Padovan } 25289bc500eSGustavo F. Padovan 253721c4181SGustavo F. Padovan static void l2cap_chan_timeout(struct work_struct *work) 254ab07801dSGustavo F. Padovan { 255721c4181SGustavo F. Padovan struct l2cap_chan *chan = container_of(work, struct l2cap_chan, 256721c4181SGustavo F. Padovan chan_timer.work); 257ab07801dSGustavo F. Padovan struct sock *sk = chan->sk; 258ab07801dSGustavo F. Padovan int reason; 259ab07801dSGustavo F. Padovan 26089bc500eSGustavo F. Padovan BT_DBG("chan %p state %d", chan, chan->state); 261ab07801dSGustavo F. Padovan 262721c4181SGustavo F. Padovan lock_sock(sk); 263ab07801dSGustavo F. Padovan 26489bc500eSGustavo F. Padovan if (chan->state == BT_CONNECTED || chan->state == BT_CONFIG) 265ab07801dSGustavo F. Padovan reason = ECONNREFUSED; 26689bc500eSGustavo F. Padovan else if (chan->state == BT_CONNECT && 267ab07801dSGustavo F. Padovan chan->sec_level != BT_SECURITY_SDP) 268ab07801dSGustavo F. Padovan reason = ECONNREFUSED; 269ab07801dSGustavo F. Padovan else 270ab07801dSGustavo F. Padovan reason = ETIMEDOUT; 271ab07801dSGustavo F. Padovan 2720f852724SGustavo F. Padovan l2cap_chan_close(chan, reason); 273ab07801dSGustavo F. Padovan 274721c4181SGustavo F. Padovan release_sock(sk); 275ab07801dSGustavo F. Padovan 276ba3bd0eeSGustavo F. Padovan chan->ops->close(chan->data); 277371fd835SUlisses Furquim l2cap_chan_put(chan); 278ab07801dSGustavo F. Padovan } 279ab07801dSGustavo F. Padovan 28023691d75SGustavo F. Padovan struct l2cap_chan *l2cap_chan_create(struct sock *sk) 2810a708f8fSGustavo F. Padovan { 28248454079SGustavo F. Padovan struct l2cap_chan *chan; 2830a708f8fSGustavo F. Padovan 28448454079SGustavo F. Padovan chan = kzalloc(sizeof(*chan), GFP_ATOMIC); 28548454079SGustavo F. Padovan if (!chan) 28648454079SGustavo F. Padovan return NULL; 2870a708f8fSGustavo F. Padovan 28848454079SGustavo F. Padovan chan->sk = sk; 28948454079SGustavo F. Padovan 290333055f2SGustavo F. Padovan write_lock(&chan_list_lock); 29123691d75SGustavo F. Padovan list_add(&chan->global_l, &chan_list); 292333055f2SGustavo F. Padovan write_unlock(&chan_list_lock); 29323691d75SGustavo F. Padovan 294721c4181SGustavo F. Padovan INIT_DELAYED_WORK(&chan->chan_timer, l2cap_chan_timeout); 295ab07801dSGustavo F. Padovan 29689bc500eSGustavo F. Padovan chan->state = BT_OPEN; 29789bc500eSGustavo F. Padovan 29871ba0e56SGustavo F. Padovan atomic_set(&chan->refcnt, 1); 29971ba0e56SGustavo F. Padovan 300abc545b8SSzymon Janc BT_DBG("sk %p chan %p", sk, chan); 301abc545b8SSzymon Janc 30248454079SGustavo F. Padovan return chan; 3030a708f8fSGustavo F. Padovan } 3040a708f8fSGustavo F. Padovan 30523691d75SGustavo F. Padovan void l2cap_chan_destroy(struct l2cap_chan *chan) 3066ff5abbfSGustavo F. Padovan { 307333055f2SGustavo F. Padovan write_lock(&chan_list_lock); 30823691d75SGustavo F. Padovan list_del(&chan->global_l); 309333055f2SGustavo F. Padovan write_unlock(&chan_list_lock); 31023691d75SGustavo F. Padovan 311371fd835SUlisses Furquim l2cap_chan_put(chan); 3126ff5abbfSGustavo F. Padovan } 3136ff5abbfSGustavo F. Padovan 3143d57dc68SGustavo F. Padovan static void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan) 3150a708f8fSGustavo F. Padovan { 3160a708f8fSGustavo F. Padovan BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, 317fe4128e0SGustavo F. Padovan chan->psm, chan->dcid); 3180a708f8fSGustavo F. Padovan 3199f5a0d7bSAndrei Emeltchenko conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM; 3200a708f8fSGustavo F. Padovan 3218c1d787bSGustavo F. Padovan chan->conn = conn; 3220a708f8fSGustavo F. Padovan 323715ec005SGustavo F. Padovan if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED) { 324b62f328bSVille Tervo if (conn->hcon->type == LE_LINK) { 325b62f328bSVille Tervo /* LE connection */ 3260c1bc5c6SGustavo F. Padovan chan->omtu = L2CAP_LE_DEFAULT_MTU; 327fe4128e0SGustavo F. Padovan chan->scid = L2CAP_CID_LE_DATA; 328fe4128e0SGustavo F. Padovan chan->dcid = L2CAP_CID_LE_DATA; 329b62f328bSVille Tervo } else { 3300a708f8fSGustavo F. Padovan /* Alloc CID for connection-oriented socket */ 331fe4128e0SGustavo F. Padovan chan->scid = l2cap_alloc_cid(conn); 3320c1bc5c6SGustavo F. Padovan chan->omtu = L2CAP_DEFAULT_MTU; 333b62f328bSVille Tervo } 334715ec005SGustavo F. Padovan } else if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { 3350a708f8fSGustavo F. Padovan /* Connectionless socket */ 336fe4128e0SGustavo F. Padovan chan->scid = L2CAP_CID_CONN_LESS; 337fe4128e0SGustavo F. Padovan chan->dcid = L2CAP_CID_CONN_LESS; 3380c1bc5c6SGustavo F. Padovan chan->omtu = L2CAP_DEFAULT_MTU; 3390a708f8fSGustavo F. Padovan } else { 3400a708f8fSGustavo F. Padovan /* Raw socket can send/recv signalling messages only */ 341fe4128e0SGustavo F. Padovan chan->scid = L2CAP_CID_SIGNALING; 342fe4128e0SGustavo F. Padovan chan->dcid = L2CAP_CID_SIGNALING; 3430c1bc5c6SGustavo F. Padovan chan->omtu = L2CAP_DEFAULT_MTU; 3440a708f8fSGustavo F. Padovan } 3450a708f8fSGustavo F. Padovan 3468f7975b1SAndrei Emeltchenko chan->local_id = L2CAP_BESTEFFORT_ID; 3478f7975b1SAndrei Emeltchenko chan->local_stype = L2CAP_SERV_BESTEFFORT; 3488f7975b1SAndrei Emeltchenko chan->local_msdu = L2CAP_DEFAULT_MAX_SDU_SIZE; 3498f7975b1SAndrei Emeltchenko chan->local_sdu_itime = L2CAP_DEFAULT_SDU_ITIME; 3508f7975b1SAndrei Emeltchenko chan->local_acc_lat = L2CAP_DEFAULT_ACC_LAT; 3518f7975b1SAndrei Emeltchenko chan->local_flush_to = L2CAP_DEFAULT_FLUSH_TO; 3528f7975b1SAndrei Emeltchenko 353371fd835SUlisses Furquim l2cap_chan_hold(chan); 354baa7e1faSGustavo F. Padovan 3553d57dc68SGustavo F. Padovan list_add_rcu(&chan->list, &conn->chan_l); 3560a708f8fSGustavo F. Padovan } 3570a708f8fSGustavo F. Padovan 3580a708f8fSGustavo F. Padovan /* Delete channel. 3590a708f8fSGustavo F. Padovan * Must be called on the locked socket. */ 3604519de9aSGustavo F. Padovan static void l2cap_chan_del(struct l2cap_chan *chan, int err) 3610a708f8fSGustavo F. Padovan { 36248454079SGustavo F. Padovan struct sock *sk = chan->sk; 3638c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 3640a708f8fSGustavo F. Padovan struct sock *parent = bt_sk(sk)->parent; 3650a708f8fSGustavo F. Padovan 366c9b66675SGustavo F. Padovan __clear_chan_timer(chan); 3670a708f8fSGustavo F. Padovan 36849208c9cSGustavo F. Padovan BT_DBG("chan %p, conn %p, err %d", chan, conn, err); 3690a708f8fSGustavo F. Padovan 3700a708f8fSGustavo F. Padovan if (conn) { 371baa7e1faSGustavo F. Padovan /* Delete from channel list */ 3723d57dc68SGustavo F. Padovan list_del_rcu(&chan->list); 3733d57dc68SGustavo F. Padovan synchronize_rcu(); 3743d57dc68SGustavo F. Padovan 375371fd835SUlisses Furquim l2cap_chan_put(chan); 376baa7e1faSGustavo F. Padovan 3778c1d787bSGustavo F. Padovan chan->conn = NULL; 3780a708f8fSGustavo F. Padovan hci_conn_put(conn->hcon); 3790a708f8fSGustavo F. Padovan } 3800a708f8fSGustavo F. Padovan 38189bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CLOSED); 3820a708f8fSGustavo F. Padovan sock_set_flag(sk, SOCK_ZAPPED); 3830a708f8fSGustavo F. Padovan 3840a708f8fSGustavo F. Padovan if (err) 3850a708f8fSGustavo F. Padovan sk->sk_err = err; 3860a708f8fSGustavo F. Padovan 3870a708f8fSGustavo F. Padovan if (parent) { 3880a708f8fSGustavo F. Padovan bt_accept_unlink(sk); 3890a708f8fSGustavo F. Padovan parent->sk_data_ready(parent, 0); 3900a708f8fSGustavo F. Padovan } else 3910a708f8fSGustavo F. Padovan sk->sk_state_change(sk); 3920a708f8fSGustavo F. Padovan 393c1360a1cSGustavo F. Padovan if (!(test_bit(CONF_OUTPUT_DONE, &chan->conf_state) && 394c1360a1cSGustavo F. Padovan test_bit(CONF_INPUT_DONE, &chan->conf_state))) 3956ff5abbfSGustavo F. Padovan return; 3962ead70b8SGustavo F. Padovan 39758d35f87SGustavo F. Padovan skb_queue_purge(&chan->tx_q); 3980a708f8fSGustavo F. Padovan 3990c1bc5c6SGustavo F. Padovan if (chan->mode == L2CAP_MODE_ERTM) { 4000a708f8fSGustavo F. Padovan struct srej_list *l, *tmp; 4010a708f8fSGustavo F. Padovan 4021a09bcb9SGustavo F. Padovan __clear_retrans_timer(chan); 4031a09bcb9SGustavo F. Padovan __clear_monitor_timer(chan); 4041a09bcb9SGustavo F. Padovan __clear_ack_timer(chan); 4050a708f8fSGustavo F. Padovan 406f1c6775bSGustavo F. Padovan skb_queue_purge(&chan->srej_q); 4070a708f8fSGustavo F. Padovan 40839d5a3eeSGustavo F. Padovan list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { 4090a708f8fSGustavo F. Padovan list_del(&l->list); 4100a708f8fSGustavo F. Padovan kfree(l); 4110a708f8fSGustavo F. Padovan } 4120a708f8fSGustavo F. Padovan } 4130a708f8fSGustavo F. Padovan } 4140a708f8fSGustavo F. Padovan 4154519de9aSGustavo F. Padovan static void l2cap_chan_cleanup_listen(struct sock *parent) 4164519de9aSGustavo F. Padovan { 4174519de9aSGustavo F. Padovan struct sock *sk; 4184519de9aSGustavo F. Padovan 4194519de9aSGustavo F. Padovan BT_DBG("parent %p", parent); 4204519de9aSGustavo F. Padovan 4214519de9aSGustavo F. Padovan /* Close not yet accepted channels */ 4220f852724SGustavo F. Padovan while ((sk = bt_accept_dequeue(parent, NULL))) { 423ba3bd0eeSGustavo F. Padovan struct l2cap_chan *chan = l2cap_pi(sk)->chan; 424c9b66675SGustavo F. Padovan __clear_chan_timer(chan); 4250f852724SGustavo F. Padovan lock_sock(sk); 426ba3bd0eeSGustavo F. Padovan l2cap_chan_close(chan, ECONNRESET); 4270f852724SGustavo F. Padovan release_sock(sk); 428ba3bd0eeSGustavo F. Padovan chan->ops->close(chan->data); 4290f852724SGustavo F. Padovan } 4304519de9aSGustavo F. Padovan } 4314519de9aSGustavo F. Padovan 4320f852724SGustavo F. Padovan void l2cap_chan_close(struct l2cap_chan *chan, int reason) 4334519de9aSGustavo F. Padovan { 4344519de9aSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 4354519de9aSGustavo F. Padovan struct sock *sk = chan->sk; 4364519de9aSGustavo F. Padovan 43789bc500eSGustavo F. Padovan BT_DBG("chan %p state %d socket %p", chan, chan->state, sk->sk_socket); 4384519de9aSGustavo F. Padovan 43989bc500eSGustavo F. Padovan switch (chan->state) { 4404519de9aSGustavo F. Padovan case BT_LISTEN: 4414519de9aSGustavo F. Padovan l2cap_chan_cleanup_listen(sk); 44289bc500eSGustavo F. Padovan 44389bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CLOSED); 44489bc500eSGustavo F. Padovan sock_set_flag(sk, SOCK_ZAPPED); 4454519de9aSGustavo F. Padovan break; 4464519de9aSGustavo F. Padovan 4474519de9aSGustavo F. Padovan case BT_CONNECTED: 4484519de9aSGustavo F. Padovan case BT_CONFIG: 449715ec005SGustavo F. Padovan if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && 4504519de9aSGustavo F. Padovan conn->hcon->type == ACL_LINK) { 451c9b66675SGustavo F. Padovan __clear_chan_timer(chan); 452c9b66675SGustavo F. Padovan __set_chan_timer(chan, sk->sk_sndtimeo); 4534519de9aSGustavo F. Padovan l2cap_send_disconn_req(conn, chan, reason); 4544519de9aSGustavo F. Padovan } else 4554519de9aSGustavo F. Padovan l2cap_chan_del(chan, reason); 4564519de9aSGustavo F. Padovan break; 4574519de9aSGustavo F. Padovan 4584519de9aSGustavo F. Padovan case BT_CONNECT2: 459715ec005SGustavo F. Padovan if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && 4604519de9aSGustavo F. Padovan conn->hcon->type == ACL_LINK) { 4614519de9aSGustavo F. Padovan struct l2cap_conn_rsp rsp; 4624519de9aSGustavo F. Padovan __u16 result; 4634519de9aSGustavo F. Padovan 4644519de9aSGustavo F. Padovan if (bt_sk(sk)->defer_setup) 4654519de9aSGustavo F. Padovan result = L2CAP_CR_SEC_BLOCK; 4664519de9aSGustavo F. Padovan else 4674519de9aSGustavo F. Padovan result = L2CAP_CR_BAD_PSM; 46889bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_DISCONN); 4694519de9aSGustavo F. Padovan 4704519de9aSGustavo F. Padovan rsp.scid = cpu_to_le16(chan->dcid); 4714519de9aSGustavo F. Padovan rsp.dcid = cpu_to_le16(chan->scid); 4724519de9aSGustavo F. Padovan rsp.result = cpu_to_le16(result); 4734519de9aSGustavo F. Padovan rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); 4744519de9aSGustavo F. Padovan l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, 4754519de9aSGustavo F. Padovan sizeof(rsp), &rsp); 4764519de9aSGustavo F. Padovan } 4774519de9aSGustavo F. Padovan 4784519de9aSGustavo F. Padovan l2cap_chan_del(chan, reason); 4794519de9aSGustavo F. Padovan break; 4804519de9aSGustavo F. Padovan 4814519de9aSGustavo F. Padovan case BT_CONNECT: 4824519de9aSGustavo F. Padovan case BT_DISCONN: 4834519de9aSGustavo F. Padovan l2cap_chan_del(chan, reason); 4844519de9aSGustavo F. Padovan break; 4854519de9aSGustavo F. Padovan 4864519de9aSGustavo F. Padovan default: 4874519de9aSGustavo F. Padovan sock_set_flag(sk, SOCK_ZAPPED); 4884519de9aSGustavo F. Padovan break; 4894519de9aSGustavo F. Padovan } 4904519de9aSGustavo F. Padovan } 4914519de9aSGustavo F. Padovan 4924343478fSGustavo F. Padovan static inline u8 l2cap_get_auth_type(struct l2cap_chan *chan) 4930a708f8fSGustavo F. Padovan { 494715ec005SGustavo F. Padovan if (chan->chan_type == L2CAP_CHAN_RAW) { 4954343478fSGustavo F. Padovan switch (chan->sec_level) { 4960a708f8fSGustavo F. Padovan case BT_SECURITY_HIGH: 4970a708f8fSGustavo F. Padovan return HCI_AT_DEDICATED_BONDING_MITM; 4980a708f8fSGustavo F. Padovan case BT_SECURITY_MEDIUM: 4990a708f8fSGustavo F. Padovan return HCI_AT_DEDICATED_BONDING; 5000a708f8fSGustavo F. Padovan default: 5010a708f8fSGustavo F. Padovan return HCI_AT_NO_BONDING; 5020a708f8fSGustavo F. Padovan } 503fe4128e0SGustavo F. Padovan } else if (chan->psm == cpu_to_le16(0x0001)) { 5044343478fSGustavo F. Padovan if (chan->sec_level == BT_SECURITY_LOW) 5054343478fSGustavo F. Padovan chan->sec_level = BT_SECURITY_SDP; 5060a708f8fSGustavo F. Padovan 5074343478fSGustavo F. Padovan if (chan->sec_level == BT_SECURITY_HIGH) 5080a708f8fSGustavo F. Padovan return HCI_AT_NO_BONDING_MITM; 5090a708f8fSGustavo F. Padovan else 5100a708f8fSGustavo F. Padovan return HCI_AT_NO_BONDING; 5110a708f8fSGustavo F. Padovan } else { 5124343478fSGustavo F. Padovan switch (chan->sec_level) { 5130a708f8fSGustavo F. Padovan case BT_SECURITY_HIGH: 5140a708f8fSGustavo F. Padovan return HCI_AT_GENERAL_BONDING_MITM; 5150a708f8fSGustavo F. Padovan case BT_SECURITY_MEDIUM: 5160a708f8fSGustavo F. Padovan return HCI_AT_GENERAL_BONDING; 5170a708f8fSGustavo F. Padovan default: 5180a708f8fSGustavo F. Padovan return HCI_AT_NO_BONDING; 5190a708f8fSGustavo F. Padovan } 5200a708f8fSGustavo F. Padovan } 5210a708f8fSGustavo F. Padovan } 5220a708f8fSGustavo F. Padovan 5230a708f8fSGustavo F. Padovan /* Service level security */ 524d45fc423SGustavo F. Padovan int l2cap_chan_check_security(struct l2cap_chan *chan) 5250a708f8fSGustavo F. Padovan { 5268c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 5270a708f8fSGustavo F. Padovan __u8 auth_type; 5280a708f8fSGustavo F. Padovan 5294343478fSGustavo F. Padovan auth_type = l2cap_get_auth_type(chan); 5300a708f8fSGustavo F. Padovan 5314343478fSGustavo F. Padovan return hci_conn_security(conn->hcon, chan->sec_level, auth_type); 5320a708f8fSGustavo F. Padovan } 5330a708f8fSGustavo F. Padovan 534b5ad8b7fSJohannes Berg static u8 l2cap_get_ident(struct l2cap_conn *conn) 5350a708f8fSGustavo F. Padovan { 5360a708f8fSGustavo F. Padovan u8 id; 5370a708f8fSGustavo F. Padovan 5380a708f8fSGustavo F. Padovan /* Get next available identificator. 5390a708f8fSGustavo F. Padovan * 1 - 128 are used by kernel. 5400a708f8fSGustavo F. Padovan * 129 - 199 are reserved. 5410a708f8fSGustavo F. Padovan * 200 - 254 are used by utilities like l2ping, etc. 5420a708f8fSGustavo F. Padovan */ 5430a708f8fSGustavo F. Padovan 544333055f2SGustavo F. Padovan spin_lock(&conn->lock); 5450a708f8fSGustavo F. Padovan 5460a708f8fSGustavo F. Padovan if (++conn->tx_ident > 128) 5470a708f8fSGustavo F. Padovan conn->tx_ident = 1; 5480a708f8fSGustavo F. Padovan 5490a708f8fSGustavo F. Padovan id = conn->tx_ident; 5500a708f8fSGustavo F. Padovan 551333055f2SGustavo F. Padovan spin_unlock(&conn->lock); 5520a708f8fSGustavo F. Padovan 5530a708f8fSGustavo F. Padovan return id; 5540a708f8fSGustavo F. Padovan } 5550a708f8fSGustavo F. Padovan 5564519de9aSGustavo F. Padovan static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) 5570a708f8fSGustavo F. Padovan { 5580a708f8fSGustavo F. Padovan struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); 5590a708f8fSGustavo F. Padovan u8 flags; 5600a708f8fSGustavo F. Padovan 5610a708f8fSGustavo F. Padovan BT_DBG("code 0x%2.2x", code); 5620a708f8fSGustavo F. Padovan 5630a708f8fSGustavo F. Padovan if (!skb) 5640a708f8fSGustavo F. Padovan return; 5650a708f8fSGustavo F. Padovan 5660a708f8fSGustavo F. Padovan if (lmp_no_flush_capable(conn->hcon->hdev)) 5670a708f8fSGustavo F. Padovan flags = ACL_START_NO_FLUSH; 5680a708f8fSGustavo F. Padovan else 5690a708f8fSGustavo F. Padovan flags = ACL_START; 5700a708f8fSGustavo F. Padovan 57114b12d0bSJaikumar Ganesh bt_cb(skb)->force_active = BT_POWER_FORCE_ACTIVE_ON; 5725e59b791SLuiz Augusto von Dentz skb->priority = HCI_PRIO_MAX; 57314b12d0bSJaikumar Ganesh 57473d80debSLuiz Augusto von Dentz hci_send_acl(conn->hchan, skb, flags); 5750a708f8fSGustavo F. Padovan } 5760a708f8fSGustavo F. Padovan 57773d80debSLuiz Augusto von Dentz static void l2cap_do_send(struct l2cap_chan *chan, struct sk_buff *skb) 57873d80debSLuiz Augusto von Dentz { 57973d80debSLuiz Augusto von Dentz struct hci_conn *hcon = chan->conn->hcon; 58073d80debSLuiz Augusto von Dentz u16 flags; 58173d80debSLuiz Augusto von Dentz 58273d80debSLuiz Augusto von Dentz BT_DBG("chan %p, skb %p len %d priority %u", chan, skb, skb->len, 58373d80debSLuiz Augusto von Dentz skb->priority); 58473d80debSLuiz Augusto von Dentz 58573d80debSLuiz Augusto von Dentz if (!test_bit(FLAG_FLUSHABLE, &chan->flags) && 58673d80debSLuiz Augusto von Dentz lmp_no_flush_capable(hcon->hdev)) 58773d80debSLuiz Augusto von Dentz flags = ACL_START_NO_FLUSH; 58873d80debSLuiz Augusto von Dentz else 58973d80debSLuiz Augusto von Dentz flags = ACL_START; 59073d80debSLuiz Augusto von Dentz 59173d80debSLuiz Augusto von Dentz bt_cb(skb)->force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); 59273d80debSLuiz Augusto von Dentz hci_send_acl(chan->conn->hchan, skb, flags); 5930a708f8fSGustavo F. Padovan } 5940a708f8fSGustavo F. Padovan 59588843ab0SAndrei Emeltchenko static inline void l2cap_send_sframe(struct l2cap_chan *chan, u32 control) 5960a708f8fSGustavo F. Padovan { 5970a708f8fSGustavo F. Padovan struct sk_buff *skb; 5980a708f8fSGustavo F. Padovan struct l2cap_hdr *lh; 5998c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 600e4ca6d98SAndrei Emeltchenko int count, hlen; 6010a708f8fSGustavo F. Padovan 60289bc500eSGustavo F. Padovan if (chan->state != BT_CONNECTED) 6030a708f8fSGustavo F. Padovan return; 6040a708f8fSGustavo F. Padovan 605e4ca6d98SAndrei Emeltchenko if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 606e4ca6d98SAndrei Emeltchenko hlen = L2CAP_EXT_HDR_SIZE; 607e4ca6d98SAndrei Emeltchenko else 608e4ca6d98SAndrei Emeltchenko hlen = L2CAP_ENH_HDR_SIZE; 6090a708f8fSGustavo F. Padovan 6100a708f8fSGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) 61103a51213SAndrei Emeltchenko hlen += L2CAP_FCS_SIZE; 6120a708f8fSGustavo F. Padovan 61388843ab0SAndrei Emeltchenko BT_DBG("chan %p, control 0x%8.8x", chan, control); 6140a708f8fSGustavo F. Padovan 6150a708f8fSGustavo F. Padovan count = min_t(unsigned int, conn->mtu, hlen); 616793c2f1cSAndrei Emeltchenko 617793c2f1cSAndrei Emeltchenko control |= __set_sframe(chan); 6180a708f8fSGustavo F. Padovan 619e2ab4353SGustavo F. Padovan if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) 62003f6715dSAndrei Emeltchenko control |= __set_ctrl_final(chan); 6210a708f8fSGustavo F. Padovan 622e2ab4353SGustavo F. Padovan if (test_and_clear_bit(CONN_SEND_PBIT, &chan->conn_state)) 623e3781735SAndrei Emeltchenko control |= __set_ctrl_poll(chan); 6240a708f8fSGustavo F. Padovan 6250a708f8fSGustavo F. Padovan skb = bt_skb_alloc(count, GFP_ATOMIC); 6260a708f8fSGustavo F. Padovan if (!skb) 6270a708f8fSGustavo F. Padovan return; 6280a708f8fSGustavo F. Padovan 6290a708f8fSGustavo F. Padovan lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); 6300a708f8fSGustavo F. Padovan lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); 631fe4128e0SGustavo F. Padovan lh->cid = cpu_to_le16(chan->dcid); 63288843ab0SAndrei Emeltchenko 63388843ab0SAndrei Emeltchenko __put_control(chan, control, skb_put(skb, __ctrl_size(chan))); 6340a708f8fSGustavo F. Padovan 63547d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) { 63603a51213SAndrei Emeltchenko u16 fcs = crc16(0, (u8 *)lh, count - L2CAP_FCS_SIZE); 63703a51213SAndrei Emeltchenko put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE)); 6380a708f8fSGustavo F. Padovan } 6390a708f8fSGustavo F. Padovan 64073d80debSLuiz Augusto von Dentz skb->priority = HCI_PRIO_MAX; 64173d80debSLuiz Augusto von Dentz l2cap_do_send(chan, skb); 6420a708f8fSGustavo F. Padovan } 6430a708f8fSGustavo F. Padovan 64488843ab0SAndrei Emeltchenko static inline void l2cap_send_rr_or_rnr(struct l2cap_chan *chan, u32 control) 6450a708f8fSGustavo F. Padovan { 646e2ab4353SGustavo F. Padovan if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { 647ab784b73SAndrei Emeltchenko control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); 648e2ab4353SGustavo F. Padovan set_bit(CONN_RNR_SENT, &chan->conn_state); 6490a708f8fSGustavo F. Padovan } else 650ab784b73SAndrei Emeltchenko control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); 6510a708f8fSGustavo F. Padovan 6520b209faeSAndrei Emeltchenko control |= __set_reqseq(chan, chan->buffer_seq); 6530a708f8fSGustavo F. Padovan 654525cd185SGustavo F. Padovan l2cap_send_sframe(chan, control); 6550a708f8fSGustavo F. Padovan } 6560a708f8fSGustavo F. Padovan 657b4450035SGustavo F. Padovan static inline int __l2cap_no_conn_pending(struct l2cap_chan *chan) 6580a708f8fSGustavo F. Padovan { 659c1360a1cSGustavo F. Padovan return !test_bit(CONF_CONNECT_PEND, &chan->conf_state); 6600a708f8fSGustavo F. Padovan } 6610a708f8fSGustavo F. Padovan 662fc7f8a7eSGustavo F. Padovan static void l2cap_do_start(struct l2cap_chan *chan) 6630a708f8fSGustavo F. Padovan { 6648c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 6650a708f8fSGustavo F. Padovan 6660a708f8fSGustavo F. Padovan if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { 6670a708f8fSGustavo F. Padovan if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) 6680a708f8fSGustavo F. Padovan return; 6690a708f8fSGustavo F. Padovan 670d45fc423SGustavo F. Padovan if (l2cap_chan_check_security(chan) && 6714343478fSGustavo F. Padovan __l2cap_no_conn_pending(chan)) { 6720a708f8fSGustavo F. Padovan struct l2cap_conn_req req; 673fe4128e0SGustavo F. Padovan req.scid = cpu_to_le16(chan->scid); 674fe4128e0SGustavo F. Padovan req.psm = chan->psm; 6750a708f8fSGustavo F. Padovan 676fc7f8a7eSGustavo F. Padovan chan->ident = l2cap_get_ident(conn); 677c1360a1cSGustavo F. Padovan set_bit(CONF_CONNECT_PEND, &chan->conf_state); 6780a708f8fSGustavo F. Padovan 679fc7f8a7eSGustavo F. Padovan l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, 680fc7f8a7eSGustavo F. Padovan sizeof(req), &req); 6810a708f8fSGustavo F. Padovan } 6820a708f8fSGustavo F. Padovan } else { 6830a708f8fSGustavo F. Padovan struct l2cap_info_req req; 6840a708f8fSGustavo F. Padovan req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); 6850a708f8fSGustavo F. Padovan 6860a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; 6870a708f8fSGustavo F. Padovan conn->info_ident = l2cap_get_ident(conn); 6880a708f8fSGustavo F. Padovan 689030013d8SGustavo F. Padovan schedule_delayed_work(&conn->info_timer, 6900a708f8fSGustavo F. Padovan msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); 6910a708f8fSGustavo F. Padovan 6920a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, conn->info_ident, 6930a708f8fSGustavo F. Padovan L2CAP_INFO_REQ, sizeof(req), &req); 6940a708f8fSGustavo F. Padovan } 6950a708f8fSGustavo F. Padovan } 6960a708f8fSGustavo F. Padovan 6970a708f8fSGustavo F. Padovan static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) 6980a708f8fSGustavo F. Padovan { 6990a708f8fSGustavo F. Padovan u32 local_feat_mask = l2cap_feat_mask; 7000a708f8fSGustavo F. Padovan if (!disable_ertm) 7010a708f8fSGustavo F. Padovan local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; 7020a708f8fSGustavo F. Padovan 7030a708f8fSGustavo F. Padovan switch (mode) { 7040a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 7050a708f8fSGustavo F. Padovan return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; 7060a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 7070a708f8fSGustavo F. Padovan return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; 7080a708f8fSGustavo F. Padovan default: 7090a708f8fSGustavo F. Padovan return 0x00; 7100a708f8fSGustavo F. Padovan } 7110a708f8fSGustavo F. Padovan } 7120a708f8fSGustavo F. Padovan 7134519de9aSGustavo F. Padovan static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct l2cap_chan *chan, int err) 7140a708f8fSGustavo F. Padovan { 715e92c8e70SGustavo F. Padovan struct sock *sk; 7160a708f8fSGustavo F. Padovan struct l2cap_disconn_req req; 7170a708f8fSGustavo F. Padovan 7180a708f8fSGustavo F. Padovan if (!conn) 7190a708f8fSGustavo F. Padovan return; 7200a708f8fSGustavo F. Padovan 721e92c8e70SGustavo F. Padovan sk = chan->sk; 722e92c8e70SGustavo F. Padovan 7230c1bc5c6SGustavo F. Padovan if (chan->mode == L2CAP_MODE_ERTM) { 7241a09bcb9SGustavo F. Padovan __clear_retrans_timer(chan); 7251a09bcb9SGustavo F. Padovan __clear_monitor_timer(chan); 7261a09bcb9SGustavo F. Padovan __clear_ack_timer(chan); 7270a708f8fSGustavo F. Padovan } 7280a708f8fSGustavo F. Padovan 729fe4128e0SGustavo F. Padovan req.dcid = cpu_to_le16(chan->dcid); 730fe4128e0SGustavo F. Padovan req.scid = cpu_to_le16(chan->scid); 7310a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), 7320a708f8fSGustavo F. Padovan L2CAP_DISCONN_REQ, sizeof(req), &req); 7330a708f8fSGustavo F. Padovan 73489bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_DISCONN); 7350a708f8fSGustavo F. Padovan sk->sk_err = err; 7360a708f8fSGustavo F. Padovan } 7370a708f8fSGustavo F. Padovan 7380a708f8fSGustavo F. Padovan /* ---- L2CAP connections ---- */ 7390a708f8fSGustavo F. Padovan static void l2cap_conn_start(struct l2cap_conn *conn) 7400a708f8fSGustavo F. Padovan { 7413d57dc68SGustavo F. Padovan struct l2cap_chan *chan; 7420a708f8fSGustavo F. Padovan 7430a708f8fSGustavo F. Padovan BT_DBG("conn %p", conn); 7440a708f8fSGustavo F. Padovan 7453d57dc68SGustavo F. Padovan rcu_read_lock(); 7460a708f8fSGustavo F. Padovan 7473d57dc68SGustavo F. Padovan list_for_each_entry_rcu(chan, &conn->chan_l, list) { 74848454079SGustavo F. Padovan struct sock *sk = chan->sk; 749baa7e1faSGustavo F. Padovan 7500a708f8fSGustavo F. Padovan bh_lock_sock(sk); 7510a708f8fSGustavo F. Padovan 752715ec005SGustavo F. Padovan if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { 7530a708f8fSGustavo F. Padovan bh_unlock_sock(sk); 7540a708f8fSGustavo F. Padovan continue; 7550a708f8fSGustavo F. Padovan } 7560a708f8fSGustavo F. Padovan 75789bc500eSGustavo F. Padovan if (chan->state == BT_CONNECT) { 7580a708f8fSGustavo F. Padovan struct l2cap_conn_req req; 7590a708f8fSGustavo F. Padovan 760d45fc423SGustavo F. Padovan if (!l2cap_chan_check_security(chan) || 761b4450035SGustavo F. Padovan !__l2cap_no_conn_pending(chan)) { 7620a708f8fSGustavo F. Padovan bh_unlock_sock(sk); 7630a708f8fSGustavo F. Padovan continue; 7640a708f8fSGustavo F. Padovan } 7650a708f8fSGustavo F. Padovan 766c1360a1cSGustavo F. Padovan if (!l2cap_mode_supported(chan->mode, conn->feat_mask) 767c1360a1cSGustavo F. Padovan && test_bit(CONF_STATE2_DEVICE, 768c1360a1cSGustavo F. Padovan &chan->conf_state)) { 7690f852724SGustavo F. Padovan /* l2cap_chan_close() calls list_del(chan) 770820ffdb3SGustavo F. Padovan * so release the lock */ 7710f852724SGustavo F. Padovan l2cap_chan_close(chan, ECONNRESET); 7720a708f8fSGustavo F. Padovan bh_unlock_sock(sk); 7730a708f8fSGustavo F. Padovan continue; 7740a708f8fSGustavo F. Padovan } 7750a708f8fSGustavo F. Padovan 776fe4128e0SGustavo F. Padovan req.scid = cpu_to_le16(chan->scid); 777fe4128e0SGustavo F. Padovan req.psm = chan->psm; 7780a708f8fSGustavo F. Padovan 779fc7f8a7eSGustavo F. Padovan chan->ident = l2cap_get_ident(conn); 780c1360a1cSGustavo F. Padovan set_bit(CONF_CONNECT_PEND, &chan->conf_state); 7810a708f8fSGustavo F. Padovan 782fc7f8a7eSGustavo F. Padovan l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, 783fc7f8a7eSGustavo F. Padovan sizeof(req), &req); 7840a708f8fSGustavo F. Padovan 78589bc500eSGustavo F. Padovan } else if (chan->state == BT_CONNECT2) { 7860a708f8fSGustavo F. Padovan struct l2cap_conn_rsp rsp; 7870a708f8fSGustavo F. Padovan char buf[128]; 788fe4128e0SGustavo F. Padovan rsp.scid = cpu_to_le16(chan->dcid); 789fe4128e0SGustavo F. Padovan rsp.dcid = cpu_to_le16(chan->scid); 7900a708f8fSGustavo F. Padovan 791d45fc423SGustavo F. Padovan if (l2cap_chan_check_security(chan)) { 7920a708f8fSGustavo F. Padovan if (bt_sk(sk)->defer_setup) { 7930a708f8fSGustavo F. Padovan struct sock *parent = bt_sk(sk)->parent; 7940a708f8fSGustavo F. Padovan rsp.result = cpu_to_le16(L2CAP_CR_PEND); 7950a708f8fSGustavo F. Padovan rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); 79605e9a2f6SIlia Kolomisnky if (parent) 7970a708f8fSGustavo F. Padovan parent->sk_data_ready(parent, 0); 7980a708f8fSGustavo F. Padovan 7990a708f8fSGustavo F. Padovan } else { 80089bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONFIG); 8010a708f8fSGustavo F. Padovan rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); 8020a708f8fSGustavo F. Padovan rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); 8030a708f8fSGustavo F. Padovan } 8040a708f8fSGustavo F. Padovan } else { 8050a708f8fSGustavo F. Padovan rsp.result = cpu_to_le16(L2CAP_CR_PEND); 8060a708f8fSGustavo F. Padovan rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); 8070a708f8fSGustavo F. Padovan } 8080a708f8fSGustavo F. Padovan 809fc7f8a7eSGustavo F. Padovan l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, 810fc7f8a7eSGustavo F. Padovan sizeof(rsp), &rsp); 8110a708f8fSGustavo F. Padovan 812c1360a1cSGustavo F. Padovan if (test_bit(CONF_REQ_SENT, &chan->conf_state) || 8130a708f8fSGustavo F. Padovan rsp.result != L2CAP_CR_SUCCESS) { 8140a708f8fSGustavo F. Padovan bh_unlock_sock(sk); 8150a708f8fSGustavo F. Padovan continue; 8160a708f8fSGustavo F. Padovan } 8170a708f8fSGustavo F. Padovan 818c1360a1cSGustavo F. Padovan set_bit(CONF_REQ_SENT, &chan->conf_state); 8190a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, 82073ffa904SGustavo F. Padovan l2cap_build_conf_req(chan, buf), buf); 82173ffa904SGustavo F. Padovan chan->num_conf_req++; 8220a708f8fSGustavo F. Padovan } 8230a708f8fSGustavo F. Padovan 8240a708f8fSGustavo F. Padovan bh_unlock_sock(sk); 8250a708f8fSGustavo F. Padovan } 8260a708f8fSGustavo F. Padovan 8273d57dc68SGustavo F. Padovan rcu_read_unlock(); 8280a708f8fSGustavo F. Padovan } 8290a708f8fSGustavo F. Padovan 830b62f328bSVille Tervo /* Find socket with cid and source bdaddr. 831b62f328bSVille Tervo * Returns closest match, locked. 832b62f328bSVille Tervo */ 83323691d75SGustavo F. Padovan static struct l2cap_chan *l2cap_global_chan_by_scid(int state, __le16 cid, bdaddr_t *src) 834b62f328bSVille Tervo { 83523691d75SGustavo F. Padovan struct l2cap_chan *c, *c1 = NULL; 836b62f328bSVille Tervo 83723691d75SGustavo F. Padovan read_lock(&chan_list_lock); 838b62f328bSVille Tervo 83923691d75SGustavo F. Padovan list_for_each_entry(c, &chan_list, global_l) { 84023691d75SGustavo F. Padovan struct sock *sk = c->sk; 841fe4128e0SGustavo F. Padovan 84289bc500eSGustavo F. Padovan if (state && c->state != state) 843b62f328bSVille Tervo continue; 844b62f328bSVille Tervo 84523691d75SGustavo F. Padovan if (c->scid == cid) { 846b62f328bSVille Tervo /* Exact match. */ 84723691d75SGustavo F. Padovan if (!bacmp(&bt_sk(sk)->src, src)) { 84823691d75SGustavo F. Padovan read_unlock(&chan_list_lock); 84923691d75SGustavo F. Padovan return c; 85023691d75SGustavo F. Padovan } 851b62f328bSVille Tervo 852b62f328bSVille Tervo /* Closest match */ 853b62f328bSVille Tervo if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) 85423691d75SGustavo F. Padovan c1 = c; 855b62f328bSVille Tervo } 856b62f328bSVille Tervo } 857280f294fSGustavo F. Padovan 85823691d75SGustavo F. Padovan read_unlock(&chan_list_lock); 859b62f328bSVille Tervo 86023691d75SGustavo F. Padovan return c1; 861b62f328bSVille Tervo } 862b62f328bSVille Tervo 863b62f328bSVille Tervo static void l2cap_le_conn_ready(struct l2cap_conn *conn) 864b62f328bSVille Tervo { 865c916fbe4SGustavo F. Padovan struct sock *parent, *sk; 86623691d75SGustavo F. Padovan struct l2cap_chan *chan, *pchan; 867b62f328bSVille Tervo 868b62f328bSVille Tervo BT_DBG(""); 869b62f328bSVille Tervo 870b62f328bSVille Tervo /* Check if we have socket listening on cid */ 87123691d75SGustavo F. Padovan pchan = l2cap_global_chan_by_scid(BT_LISTEN, L2CAP_CID_LE_DATA, 872b62f328bSVille Tervo conn->src); 87323691d75SGustavo F. Padovan if (!pchan) 874b62f328bSVille Tervo return; 875b62f328bSVille Tervo 87623691d75SGustavo F. Padovan parent = pchan->sk; 87723691d75SGustavo F. Padovan 878aa2ac881SGustavo F. Padovan lock_sock(parent); 87962f3a2cfSGustavo F. Padovan 880b62f328bSVille Tervo /* Check for backlog size */ 881b62f328bSVille Tervo if (sk_acceptq_is_full(parent)) { 882b62f328bSVille Tervo BT_DBG("backlog full %d", parent->sk_ack_backlog); 883b62f328bSVille Tervo goto clean; 884b62f328bSVille Tervo } 885b62f328bSVille Tervo 88680808e43SGustavo F. Padovan chan = pchan->ops->new_connection(pchan->data); 88780808e43SGustavo F. Padovan if (!chan) 888b62f328bSVille Tervo goto clean; 889b62f328bSVille Tervo 89080808e43SGustavo F. Padovan sk = chan->sk; 8915d41ce1dSGustavo F. Padovan 892b62f328bSVille Tervo hci_conn_hold(conn->hcon); 893b62f328bSVille Tervo 894b62f328bSVille Tervo bacpy(&bt_sk(sk)->src, conn->src); 895b62f328bSVille Tervo bacpy(&bt_sk(sk)->dst, conn->dst); 896b62f328bSVille Tervo 897d1010240SGustavo F. Padovan bt_accept_enqueue(parent, sk); 898d1010240SGustavo F. Padovan 8993d57dc68SGustavo F. Padovan l2cap_chan_add(conn, chan); 90048454079SGustavo F. Padovan 901c9b66675SGustavo F. Padovan __set_chan_timer(chan, sk->sk_sndtimeo); 902b62f328bSVille Tervo 90389bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONNECTED); 904b62f328bSVille Tervo parent->sk_data_ready(parent, 0); 905b62f328bSVille Tervo 906b62f328bSVille Tervo clean: 907aa2ac881SGustavo F. Padovan release_sock(parent); 908b62f328bSVille Tervo } 909b62f328bSVille Tervo 910f1cb9af5SVinicius Costa Gomes static void l2cap_chan_ready(struct sock *sk) 911f1cb9af5SVinicius Costa Gomes { 912f1cb9af5SVinicius Costa Gomes struct l2cap_chan *chan = l2cap_pi(sk)->chan; 913f1cb9af5SVinicius Costa Gomes struct sock *parent = bt_sk(sk)->parent; 914f1cb9af5SVinicius Costa Gomes 915f1cb9af5SVinicius Costa Gomes BT_DBG("sk %p, parent %p", sk, parent); 916f1cb9af5SVinicius Costa Gomes 917f1cb9af5SVinicius Costa Gomes chan->conf_state = 0; 918f1cb9af5SVinicius Costa Gomes __clear_chan_timer(chan); 919f1cb9af5SVinicius Costa Gomes 92043f3dc41SVinicius Costa Gomes l2cap_state_change(chan, BT_CONNECTED); 921f1cb9af5SVinicius Costa Gomes sk->sk_state_change(sk); 922f1cb9af5SVinicius Costa Gomes 923f1cb9af5SVinicius Costa Gomes if (parent) 924f1cb9af5SVinicius Costa Gomes parent->sk_data_ready(parent, 0); 925f1cb9af5SVinicius Costa Gomes } 926f1cb9af5SVinicius Costa Gomes 9270a708f8fSGustavo F. Padovan static void l2cap_conn_ready(struct l2cap_conn *conn) 9280a708f8fSGustavo F. Padovan { 92948454079SGustavo F. Padovan struct l2cap_chan *chan; 9300a708f8fSGustavo F. Padovan 9310a708f8fSGustavo F. Padovan BT_DBG("conn %p", conn); 9320a708f8fSGustavo F. Padovan 933b62f328bSVille Tervo if (!conn->hcon->out && conn->hcon->type == LE_LINK) 934b62f328bSVille Tervo l2cap_le_conn_ready(conn); 935b62f328bSVille Tervo 936160dc6acSVinicius Costa Gomes if (conn->hcon->out && conn->hcon->type == LE_LINK) 937160dc6acSVinicius Costa Gomes smp_conn_security(conn, conn->hcon->pending_sec_level); 938160dc6acSVinicius Costa Gomes 9393d57dc68SGustavo F. Padovan rcu_read_lock(); 9400a708f8fSGustavo F. Padovan 9413d57dc68SGustavo F. Padovan list_for_each_entry_rcu(chan, &conn->chan_l, list) { 94248454079SGustavo F. Padovan struct sock *sk = chan->sk; 943baa7e1faSGustavo F. Padovan 9440a708f8fSGustavo F. Padovan bh_lock_sock(sk); 9450a708f8fSGustavo F. Padovan 94663128451SVinicius Costa Gomes if (conn->hcon->type == LE_LINK) { 947b501d6a1SAnderson Briglia if (smp_conn_security(conn, chan->sec_level)) 948f1cb9af5SVinicius Costa Gomes l2cap_chan_ready(sk); 949acd7d370SVille Tervo 95063128451SVinicius Costa Gomes } else if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { 951c9b66675SGustavo F. Padovan __clear_chan_timer(chan); 95289bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONNECTED); 9530a708f8fSGustavo F. Padovan sk->sk_state_change(sk); 954b501d6a1SAnderson Briglia 95589bc500eSGustavo F. Padovan } else if (chan->state == BT_CONNECT) 956fc7f8a7eSGustavo F. Padovan l2cap_do_start(chan); 9570a708f8fSGustavo F. Padovan 9580a708f8fSGustavo F. Padovan bh_unlock_sock(sk); 9590a708f8fSGustavo F. Padovan } 9600a708f8fSGustavo F. Padovan 9613d57dc68SGustavo F. Padovan rcu_read_unlock(); 9620a708f8fSGustavo F. Padovan } 9630a708f8fSGustavo F. Padovan 9640a708f8fSGustavo F. Padovan /* Notify sockets that we cannot guaranty reliability anymore */ 9650a708f8fSGustavo F. Padovan static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) 9660a708f8fSGustavo F. Padovan { 96748454079SGustavo F. Padovan struct l2cap_chan *chan; 9680a708f8fSGustavo F. Padovan 9690a708f8fSGustavo F. Padovan BT_DBG("conn %p", conn); 9700a708f8fSGustavo F. Padovan 9713d57dc68SGustavo F. Padovan rcu_read_lock(); 9720a708f8fSGustavo F. Padovan 9733d57dc68SGustavo F. Padovan list_for_each_entry_rcu(chan, &conn->chan_l, list) { 97448454079SGustavo F. Padovan struct sock *sk = chan->sk; 975baa7e1faSGustavo F. Padovan 976ecf61bdbSAndrei Emeltchenko if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) 9770a708f8fSGustavo F. Padovan sk->sk_err = err; 9780a708f8fSGustavo F. Padovan } 9790a708f8fSGustavo F. Padovan 9803d57dc68SGustavo F. Padovan rcu_read_unlock(); 9810a708f8fSGustavo F. Padovan } 9820a708f8fSGustavo F. Padovan 983f878fcadSGustavo F. Padovan static void l2cap_info_timeout(struct work_struct *work) 9840a708f8fSGustavo F. Padovan { 985f878fcadSGustavo F. Padovan struct l2cap_conn *conn = container_of(work, struct l2cap_conn, 986030013d8SGustavo F. Padovan info_timer.work); 9870a708f8fSGustavo F. Padovan 9880a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; 9890a708f8fSGustavo F. Padovan conn->info_ident = 0; 9900a708f8fSGustavo F. Padovan 9910a708f8fSGustavo F. Padovan l2cap_conn_start(conn); 9920a708f8fSGustavo F. Padovan } 9930a708f8fSGustavo F. Padovan 9945d3de7dfSVinicius Costa Gomes static void l2cap_conn_del(struct hci_conn *hcon, int err) 9955d3de7dfSVinicius Costa Gomes { 9965d3de7dfSVinicius Costa Gomes struct l2cap_conn *conn = hcon->l2cap_data; 9975d3de7dfSVinicius Costa Gomes struct l2cap_chan *chan, *l; 9985d3de7dfSVinicius Costa Gomes struct sock *sk; 9995d3de7dfSVinicius Costa Gomes 10005d3de7dfSVinicius Costa Gomes if (!conn) 10015d3de7dfSVinicius Costa Gomes return; 10025d3de7dfSVinicius Costa Gomes 10035d3de7dfSVinicius Costa Gomes BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); 10045d3de7dfSVinicius Costa Gomes 10055d3de7dfSVinicius Costa Gomes kfree_skb(conn->rx_skb); 10065d3de7dfSVinicius Costa Gomes 10075d3de7dfSVinicius Costa Gomes /* Kill channels */ 10085d3de7dfSVinicius Costa Gomes list_for_each_entry_safe(chan, l, &conn->chan_l, list) { 10095d3de7dfSVinicius Costa Gomes sk = chan->sk; 1010aa2ac881SGustavo F. Padovan lock_sock(sk); 10115d3de7dfSVinicius Costa Gomes l2cap_chan_del(chan, err); 1012aa2ac881SGustavo F. Padovan release_sock(sk); 10135d3de7dfSVinicius Costa Gomes chan->ops->close(chan->data); 10145d3de7dfSVinicius Costa Gomes } 10155d3de7dfSVinicius Costa Gomes 101673d80debSLuiz Augusto von Dentz hci_chan_del(conn->hchan); 101773d80debSLuiz Augusto von Dentz 10185d3de7dfSVinicius Costa Gomes if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) 1019371fd835SUlisses Furquim __cancel_delayed_work(&conn->info_timer); 10205d3de7dfSVinicius Costa Gomes 102151a8efd7SJohan Hedberg if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->flags)) { 1022371fd835SUlisses Furquim __cancel_delayed_work(&conn->security_timer); 10238aab4757SVinicius Costa Gomes smp_chan_destroy(conn); 1024d26a2345SVinicius Costa Gomes } 10255d3de7dfSVinicius Costa Gomes 10265d3de7dfSVinicius Costa Gomes hcon->l2cap_data = NULL; 10275d3de7dfSVinicius Costa Gomes kfree(conn); 10285d3de7dfSVinicius Costa Gomes } 10295d3de7dfSVinicius Costa Gomes 10306c9d42a1SGustavo F. Padovan static void security_timeout(struct work_struct *work) 10315d3de7dfSVinicius Costa Gomes { 10326c9d42a1SGustavo F. Padovan struct l2cap_conn *conn = container_of(work, struct l2cap_conn, 10336c9d42a1SGustavo F. Padovan security_timer.work); 10345d3de7dfSVinicius Costa Gomes 10355d3de7dfSVinicius Costa Gomes l2cap_conn_del(conn->hcon, ETIMEDOUT); 10365d3de7dfSVinicius Costa Gomes } 10375d3de7dfSVinicius Costa Gomes 10380a708f8fSGustavo F. Padovan static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) 10390a708f8fSGustavo F. Padovan { 10400a708f8fSGustavo F. Padovan struct l2cap_conn *conn = hcon->l2cap_data; 104173d80debSLuiz Augusto von Dentz struct hci_chan *hchan; 10420a708f8fSGustavo F. Padovan 10430a708f8fSGustavo F. Padovan if (conn || status) 10440a708f8fSGustavo F. Padovan return conn; 10450a708f8fSGustavo F. Padovan 104673d80debSLuiz Augusto von Dentz hchan = hci_chan_create(hcon); 104773d80debSLuiz Augusto von Dentz if (!hchan) 10480a708f8fSGustavo F. Padovan return NULL; 10490a708f8fSGustavo F. Padovan 105073d80debSLuiz Augusto von Dentz conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); 105173d80debSLuiz Augusto von Dentz if (!conn) { 105273d80debSLuiz Augusto von Dentz hci_chan_del(hchan); 105373d80debSLuiz Augusto von Dentz return NULL; 105473d80debSLuiz Augusto von Dentz } 105573d80debSLuiz Augusto von Dentz 10560a708f8fSGustavo F. Padovan hcon->l2cap_data = conn; 10570a708f8fSGustavo F. Padovan conn->hcon = hcon; 105873d80debSLuiz Augusto von Dentz conn->hchan = hchan; 10590a708f8fSGustavo F. Padovan 106073d80debSLuiz Augusto von Dentz BT_DBG("hcon %p conn %p hchan %p", hcon, conn, hchan); 10610a708f8fSGustavo F. Padovan 1062acd7d370SVille Tervo if (hcon->hdev->le_mtu && hcon->type == LE_LINK) 1063acd7d370SVille Tervo conn->mtu = hcon->hdev->le_mtu; 1064acd7d370SVille Tervo else 10650a708f8fSGustavo F. Padovan conn->mtu = hcon->hdev->acl_mtu; 1066acd7d370SVille Tervo 10670a708f8fSGustavo F. Padovan conn->src = &hcon->hdev->bdaddr; 10680a708f8fSGustavo F. Padovan conn->dst = &hcon->dst; 10690a708f8fSGustavo F. Padovan 10700a708f8fSGustavo F. Padovan conn->feat_mask = 0; 10710a708f8fSGustavo F. Padovan 10720a708f8fSGustavo F. Padovan spin_lock_init(&conn->lock); 1073baa7e1faSGustavo F. Padovan 1074baa7e1faSGustavo F. Padovan INIT_LIST_HEAD(&conn->chan_l); 10750a708f8fSGustavo F. Padovan 10765d3de7dfSVinicius Costa Gomes if (hcon->type == LE_LINK) 10776c9d42a1SGustavo F. Padovan INIT_DELAYED_WORK(&conn->security_timer, security_timeout); 10785d3de7dfSVinicius Costa Gomes else 1079030013d8SGustavo F. Padovan INIT_DELAYED_WORK(&conn->info_timer, l2cap_info_timeout); 10800a708f8fSGustavo F. Padovan 10819f5a0d7bSAndrei Emeltchenko conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM; 10820a708f8fSGustavo F. Padovan 10830a708f8fSGustavo F. Padovan return conn; 10840a708f8fSGustavo F. Padovan } 10850a708f8fSGustavo F. Padovan 10860a708f8fSGustavo F. Padovan /* ---- Socket interface ---- */ 10870a708f8fSGustavo F. Padovan 10880a708f8fSGustavo F. Padovan /* Find socket with psm and source bdaddr. 10890a708f8fSGustavo F. Padovan * Returns closest match. 10900a708f8fSGustavo F. Padovan */ 109123691d75SGustavo F. Padovan static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm, bdaddr_t *src) 10920a708f8fSGustavo F. Padovan { 109323691d75SGustavo F. Padovan struct l2cap_chan *c, *c1 = NULL; 10940a708f8fSGustavo F. Padovan 109523691d75SGustavo F. Padovan read_lock(&chan_list_lock); 10960a708f8fSGustavo F. Padovan 109723691d75SGustavo F. Padovan list_for_each_entry(c, &chan_list, global_l) { 109823691d75SGustavo F. Padovan struct sock *sk = c->sk; 1099fe4128e0SGustavo F. Padovan 110089bc500eSGustavo F. Padovan if (state && c->state != state) 11010a708f8fSGustavo F. Padovan continue; 11020a708f8fSGustavo F. Padovan 110323691d75SGustavo F. Padovan if (c->psm == psm) { 11040a708f8fSGustavo F. Padovan /* Exact match. */ 110523691d75SGustavo F. Padovan if (!bacmp(&bt_sk(sk)->src, src)) { 1106a7567b20SJohannes Berg read_unlock(&chan_list_lock); 110723691d75SGustavo F. Padovan return c; 110823691d75SGustavo F. Padovan } 11090a708f8fSGustavo F. Padovan 11100a708f8fSGustavo F. Padovan /* Closest match */ 11110a708f8fSGustavo F. Padovan if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) 111223691d75SGustavo F. Padovan c1 = c; 11130a708f8fSGustavo F. Padovan } 11140a708f8fSGustavo F. Padovan } 11150a708f8fSGustavo F. Padovan 111623691d75SGustavo F. Padovan read_unlock(&chan_list_lock); 11170a708f8fSGustavo F. Padovan 111823691d75SGustavo F. Padovan return c1; 11190a708f8fSGustavo F. Padovan } 11200a708f8fSGustavo F. Padovan 1121cbe8fed4SJohan Hedberg int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, bdaddr_t *dst) 11220a708f8fSGustavo F. Padovan { 11235d41ce1dSGustavo F. Padovan struct sock *sk = chan->sk; 11240a708f8fSGustavo F. Padovan bdaddr_t *src = &bt_sk(sk)->src; 11250a708f8fSGustavo F. Padovan struct l2cap_conn *conn; 11260a708f8fSGustavo F. Padovan struct hci_conn *hcon; 11270a708f8fSGustavo F. Padovan struct hci_dev *hdev; 11280a708f8fSGustavo F. Padovan __u8 auth_type; 11290a708f8fSGustavo F. Padovan int err; 11300a708f8fSGustavo F. Padovan 11310a708f8fSGustavo F. Padovan BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), 1132fe4128e0SGustavo F. Padovan chan->psm); 11330a708f8fSGustavo F. Padovan 11340a708f8fSGustavo F. Padovan hdev = hci_get_route(dst, src); 11350a708f8fSGustavo F. Padovan if (!hdev) 11360a708f8fSGustavo F. Padovan return -EHOSTUNREACH; 11370a708f8fSGustavo F. Padovan 113809fd0de5SGustavo F. Padovan hci_dev_lock(hdev); 11390a708f8fSGustavo F. Padovan 114003a00194SGustavo F. Padovan lock_sock(sk); 114103a00194SGustavo F. Padovan 114203a00194SGustavo F. Padovan /* PSM must be odd and lsb of upper byte must be 0 */ 114303a00194SGustavo F. Padovan if ((__le16_to_cpu(psm) & 0x0101) != 0x0001 && !cid && 114403a00194SGustavo F. Padovan chan->chan_type != L2CAP_CHAN_RAW) { 114503a00194SGustavo F. Padovan err = -EINVAL; 114603a00194SGustavo F. Padovan goto done; 114703a00194SGustavo F. Padovan } 114803a00194SGustavo F. Padovan 114903a00194SGustavo F. Padovan if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && !(psm || cid)) { 115003a00194SGustavo F. Padovan err = -EINVAL; 115103a00194SGustavo F. Padovan goto done; 115203a00194SGustavo F. Padovan } 115303a00194SGustavo F. Padovan 115403a00194SGustavo F. Padovan switch (chan->mode) { 115503a00194SGustavo F. Padovan case L2CAP_MODE_BASIC: 115603a00194SGustavo F. Padovan break; 115703a00194SGustavo F. Padovan case L2CAP_MODE_ERTM: 115803a00194SGustavo F. Padovan case L2CAP_MODE_STREAMING: 115903a00194SGustavo F. Padovan if (!disable_ertm) 116003a00194SGustavo F. Padovan break; 116103a00194SGustavo F. Padovan /* fall through */ 116203a00194SGustavo F. Padovan default: 116303a00194SGustavo F. Padovan err = -ENOTSUPP; 116403a00194SGustavo F. Padovan goto done; 116503a00194SGustavo F. Padovan } 116603a00194SGustavo F. Padovan 116703a00194SGustavo F. Padovan switch (sk->sk_state) { 116803a00194SGustavo F. Padovan case BT_CONNECT: 116903a00194SGustavo F. Padovan case BT_CONNECT2: 117003a00194SGustavo F. Padovan case BT_CONFIG: 117103a00194SGustavo F. Padovan /* Already connecting */ 117203a00194SGustavo F. Padovan err = 0; 117303a00194SGustavo F. Padovan goto done; 117403a00194SGustavo F. Padovan 117503a00194SGustavo F. Padovan case BT_CONNECTED: 117603a00194SGustavo F. Padovan /* Already connected */ 117703a00194SGustavo F. Padovan err = -EISCONN; 117803a00194SGustavo F. Padovan goto done; 117903a00194SGustavo F. Padovan 118003a00194SGustavo F. Padovan case BT_OPEN: 118103a00194SGustavo F. Padovan case BT_BOUND: 118203a00194SGustavo F. Padovan /* Can connect */ 118303a00194SGustavo F. Padovan break; 118403a00194SGustavo F. Padovan 118503a00194SGustavo F. Padovan default: 118603a00194SGustavo F. Padovan err = -EBADFD; 118703a00194SGustavo F. Padovan goto done; 118803a00194SGustavo F. Padovan } 118903a00194SGustavo F. Padovan 119003a00194SGustavo F. Padovan /* Set destination address and psm */ 11919219b2a0SGustavo F. Padovan bacpy(&bt_sk(sk)->dst, dst); 119203a00194SGustavo F. Padovan chan->psm = psm; 119303a00194SGustavo F. Padovan chan->dcid = cid; 11940a708f8fSGustavo F. Padovan 11954343478fSGustavo F. Padovan auth_type = l2cap_get_auth_type(chan); 11960a708f8fSGustavo F. Padovan 1197fe4128e0SGustavo F. Padovan if (chan->dcid == L2CAP_CID_LE_DATA) 1198acd7d370SVille Tervo hcon = hci_connect(hdev, LE_LINK, dst, 11994343478fSGustavo F. Padovan chan->sec_level, auth_type); 1200acd7d370SVille Tervo else 12010a708f8fSGustavo F. Padovan hcon = hci_connect(hdev, ACL_LINK, dst, 12024343478fSGustavo F. Padovan chan->sec_level, auth_type); 1203acd7d370SVille Tervo 120430e76272SVille Tervo if (IS_ERR(hcon)) { 120530e76272SVille Tervo err = PTR_ERR(hcon); 12060a708f8fSGustavo F. Padovan goto done; 120730e76272SVille Tervo } 12080a708f8fSGustavo F. Padovan 12090a708f8fSGustavo F. Padovan conn = l2cap_conn_add(hcon, 0); 12100a708f8fSGustavo F. Padovan if (!conn) { 12110a708f8fSGustavo F. Padovan hci_conn_put(hcon); 121230e76272SVille Tervo err = -ENOMEM; 12130a708f8fSGustavo F. Padovan goto done; 12140a708f8fSGustavo F. Padovan } 12150a708f8fSGustavo F. Padovan 12160a708f8fSGustavo F. Padovan /* Update source addr of the socket */ 12170a708f8fSGustavo F. Padovan bacpy(src, conn->src); 12180a708f8fSGustavo F. Padovan 121948454079SGustavo F. Padovan l2cap_chan_add(conn, chan); 122048454079SGustavo F. Padovan 122189bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONNECT); 1222c9b66675SGustavo F. Padovan __set_chan_timer(chan, sk->sk_sndtimeo); 12230a708f8fSGustavo F. Padovan 12240a708f8fSGustavo F. Padovan if (hcon->state == BT_CONNECTED) { 1225715ec005SGustavo F. Padovan if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { 1226c9b66675SGustavo F. Padovan __clear_chan_timer(chan); 1227d45fc423SGustavo F. Padovan if (l2cap_chan_check_security(chan)) 122889bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONNECTED); 12290a708f8fSGustavo F. Padovan } else 1230fc7f8a7eSGustavo F. Padovan l2cap_do_start(chan); 12310a708f8fSGustavo F. Padovan } 12320a708f8fSGustavo F. Padovan 123330e76272SVille Tervo err = 0; 123430e76272SVille Tervo 12350a708f8fSGustavo F. Padovan done: 123609fd0de5SGustavo F. Padovan hci_dev_unlock(hdev); 12370a708f8fSGustavo F. Padovan hci_dev_put(hdev); 12380a708f8fSGustavo F. Padovan return err; 12390a708f8fSGustavo F. Padovan } 12400a708f8fSGustavo F. Padovan 1241dcba0dbaSGustavo F. Padovan int __l2cap_wait_ack(struct sock *sk) 12420a708f8fSGustavo F. Padovan { 12438c1d787bSGustavo F. Padovan struct l2cap_chan *chan = l2cap_pi(sk)->chan; 12440a708f8fSGustavo F. Padovan DECLARE_WAITQUEUE(wait, current); 12450a708f8fSGustavo F. Padovan int err = 0; 12460a708f8fSGustavo F. Padovan int timeo = HZ/5; 12470a708f8fSGustavo F. Padovan 12480a708f8fSGustavo F. Padovan add_wait_queue(sk_sleep(sk), &wait); 12490a708f8fSGustavo F. Padovan set_current_state(TASK_INTERRUPTIBLE); 1250a71a0cf4SPeter Hurley while (chan->unacked_frames > 0 && chan->conn) { 12510a708f8fSGustavo F. Padovan if (!timeo) 12520a708f8fSGustavo F. Padovan timeo = HZ/5; 12530a708f8fSGustavo F. Padovan 12540a708f8fSGustavo F. Padovan if (signal_pending(current)) { 12550a708f8fSGustavo F. Padovan err = sock_intr_errno(timeo); 12560a708f8fSGustavo F. Padovan break; 12570a708f8fSGustavo F. Padovan } 12580a708f8fSGustavo F. Padovan 12590a708f8fSGustavo F. Padovan release_sock(sk); 12600a708f8fSGustavo F. Padovan timeo = schedule_timeout(timeo); 12610a708f8fSGustavo F. Padovan lock_sock(sk); 1262a71a0cf4SPeter Hurley set_current_state(TASK_INTERRUPTIBLE); 12630a708f8fSGustavo F. Padovan 12640a708f8fSGustavo F. Padovan err = sock_error(sk); 12650a708f8fSGustavo F. Padovan if (err) 12660a708f8fSGustavo F. Padovan break; 12670a708f8fSGustavo F. Padovan } 12680a708f8fSGustavo F. Padovan set_current_state(TASK_RUNNING); 12690a708f8fSGustavo F. Padovan remove_wait_queue(sk_sleep(sk), &wait); 12700a708f8fSGustavo F. Padovan return err; 12710a708f8fSGustavo F. Padovan } 12720a708f8fSGustavo F. Padovan 1273721c4181SGustavo F. Padovan static void l2cap_monitor_timeout(struct work_struct *work) 12740a708f8fSGustavo F. Padovan { 1275721c4181SGustavo F. Padovan struct l2cap_chan *chan = container_of(work, struct l2cap_chan, 1276721c4181SGustavo F. Padovan monitor_timer.work); 1277525cd185SGustavo F. Padovan struct sock *sk = chan->sk; 12780a708f8fSGustavo F. Padovan 1279525cd185SGustavo F. Padovan BT_DBG("chan %p", chan); 12800a708f8fSGustavo F. Padovan 1281721c4181SGustavo F. Padovan lock_sock(sk); 12822c03a7a4SGustavo F. Padovan if (chan->retry_count >= chan->remote_max_tx) { 12838c1d787bSGustavo F. Padovan l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); 1284721c4181SGustavo F. Padovan release_sock(sk); 12850a708f8fSGustavo F. Padovan return; 12860a708f8fSGustavo F. Padovan } 12870a708f8fSGustavo F. Padovan 12886a026610SGustavo F. Padovan chan->retry_count++; 12891a09bcb9SGustavo F. Padovan __set_monitor_timer(chan); 12900a708f8fSGustavo F. Padovan 1291525cd185SGustavo F. Padovan l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); 1292721c4181SGustavo F. Padovan release_sock(sk); 12930a708f8fSGustavo F. Padovan } 12940a708f8fSGustavo F. Padovan 1295721c4181SGustavo F. Padovan static void l2cap_retrans_timeout(struct work_struct *work) 12960a708f8fSGustavo F. Padovan { 1297721c4181SGustavo F. Padovan struct l2cap_chan *chan = container_of(work, struct l2cap_chan, 1298721c4181SGustavo F. Padovan retrans_timer.work); 1299525cd185SGustavo F. Padovan struct sock *sk = chan->sk; 13000a708f8fSGustavo F. Padovan 130149208c9cSGustavo F. Padovan BT_DBG("chan %p", chan); 13020a708f8fSGustavo F. Padovan 1303721c4181SGustavo F. Padovan lock_sock(sk); 13046a026610SGustavo F. Padovan chan->retry_count = 1; 13051a09bcb9SGustavo F. Padovan __set_monitor_timer(chan); 13060a708f8fSGustavo F. Padovan 1307e2ab4353SGustavo F. Padovan set_bit(CONN_WAIT_F, &chan->conn_state); 13080a708f8fSGustavo F. Padovan 1309525cd185SGustavo F. Padovan l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); 1310721c4181SGustavo F. Padovan release_sock(sk); 13110a708f8fSGustavo F. Padovan } 13120a708f8fSGustavo F. Padovan 131342e5c802SGustavo F. Padovan static void l2cap_drop_acked_frames(struct l2cap_chan *chan) 13140a708f8fSGustavo F. Padovan { 13150a708f8fSGustavo F. Padovan struct sk_buff *skb; 13160a708f8fSGustavo F. Padovan 131758d35f87SGustavo F. Padovan while ((skb = skb_peek(&chan->tx_q)) && 13186a026610SGustavo F. Padovan chan->unacked_frames) { 131942e5c802SGustavo F. Padovan if (bt_cb(skb)->tx_seq == chan->expected_ack_seq) 13200a708f8fSGustavo F. Padovan break; 13210a708f8fSGustavo F. Padovan 132258d35f87SGustavo F. Padovan skb = skb_dequeue(&chan->tx_q); 13230a708f8fSGustavo F. Padovan kfree_skb(skb); 13240a708f8fSGustavo F. Padovan 13256a026610SGustavo F. Padovan chan->unacked_frames--; 13260a708f8fSGustavo F. Padovan } 13270a708f8fSGustavo F. Padovan 13286a026610SGustavo F. Padovan if (!chan->unacked_frames) 13291a09bcb9SGustavo F. Padovan __clear_retrans_timer(chan); 13300a708f8fSGustavo F. Padovan } 13310a708f8fSGustavo F. Padovan 133267c9e840SSzymon Janc static void l2cap_streaming_send(struct l2cap_chan *chan) 13330a708f8fSGustavo F. Padovan { 13340a708f8fSGustavo F. Padovan struct sk_buff *skb; 133588843ab0SAndrei Emeltchenko u32 control; 133688843ab0SAndrei Emeltchenko u16 fcs; 13370a708f8fSGustavo F. Padovan 133858d35f87SGustavo F. Padovan while ((skb = skb_dequeue(&chan->tx_q))) { 133988843ab0SAndrei Emeltchenko control = __get_control(chan, skb->data + L2CAP_HDR_SIZE); 1340fb45de7dSAndrei Emeltchenko control |= __set_txseq(chan, chan->next_tx_seq); 134188843ab0SAndrei Emeltchenko __put_control(chan, control, skb->data + L2CAP_HDR_SIZE); 13420a708f8fSGustavo F. Padovan 134347d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) { 134403a51213SAndrei Emeltchenko fcs = crc16(0, (u8 *)skb->data, 134503a51213SAndrei Emeltchenko skb->len - L2CAP_FCS_SIZE); 134603a51213SAndrei Emeltchenko put_unaligned_le16(fcs, 134703a51213SAndrei Emeltchenko skb->data + skb->len - L2CAP_FCS_SIZE); 13480a708f8fSGustavo F. Padovan } 13490a708f8fSGustavo F. Padovan 13504343478fSGustavo F. Padovan l2cap_do_send(chan, skb); 13510a708f8fSGustavo F. Padovan 1352836be934SAndrei Emeltchenko chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq); 13530a708f8fSGustavo F. Padovan } 13540a708f8fSGustavo F. Padovan } 13550a708f8fSGustavo F. Padovan 1356fb45de7dSAndrei Emeltchenko static void l2cap_retransmit_one_frame(struct l2cap_chan *chan, u16 tx_seq) 13570a708f8fSGustavo F. Padovan { 13580a708f8fSGustavo F. Padovan struct sk_buff *skb, *tx_skb; 135988843ab0SAndrei Emeltchenko u16 fcs; 136088843ab0SAndrei Emeltchenko u32 control; 13610a708f8fSGustavo F. Padovan 136258d35f87SGustavo F. Padovan skb = skb_peek(&chan->tx_q); 13630a708f8fSGustavo F. Padovan if (!skb) 13640a708f8fSGustavo F. Padovan return; 13650a708f8fSGustavo F. Padovan 1366d1726b6dSSzymon Janc while (bt_cb(skb)->tx_seq != tx_seq) { 136758d35f87SGustavo F. Padovan if (skb_queue_is_last(&chan->tx_q, skb)) 13680a708f8fSGustavo F. Padovan return; 13690a708f8fSGustavo F. Padovan 1370d1726b6dSSzymon Janc skb = skb_queue_next(&chan->tx_q, skb); 1371d1726b6dSSzymon Janc } 13720a708f8fSGustavo F. Padovan 13732c03a7a4SGustavo F. Padovan if (chan->remote_max_tx && 13742c03a7a4SGustavo F. Padovan bt_cb(skb)->retries == chan->remote_max_tx) { 13758c1d787bSGustavo F. Padovan l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); 13760a708f8fSGustavo F. Padovan return; 13770a708f8fSGustavo F. Padovan } 13780a708f8fSGustavo F. Padovan 13790a708f8fSGustavo F. Padovan tx_skb = skb_clone(skb, GFP_ATOMIC); 13800a708f8fSGustavo F. Padovan bt_cb(skb)->retries++; 138188843ab0SAndrei Emeltchenko 138288843ab0SAndrei Emeltchenko control = __get_control(chan, tx_skb->data + L2CAP_HDR_SIZE); 13837e0ef6eeSAndrei Emeltchenko control &= __get_sar_mask(chan); 13840a708f8fSGustavo F. Padovan 1385e2ab4353SGustavo F. Padovan if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) 138603f6715dSAndrei Emeltchenko control |= __set_ctrl_final(chan); 13870a708f8fSGustavo F. Padovan 13880b209faeSAndrei Emeltchenko control |= __set_reqseq(chan, chan->buffer_seq); 1389fb45de7dSAndrei Emeltchenko control |= __set_txseq(chan, tx_seq); 13900a708f8fSGustavo F. Padovan 139188843ab0SAndrei Emeltchenko __put_control(chan, control, tx_skb->data + L2CAP_HDR_SIZE); 13920a708f8fSGustavo F. Padovan 139347d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) { 139403a51213SAndrei Emeltchenko fcs = crc16(0, (u8 *)tx_skb->data, 139503a51213SAndrei Emeltchenko tx_skb->len - L2CAP_FCS_SIZE); 139603a51213SAndrei Emeltchenko put_unaligned_le16(fcs, 139703a51213SAndrei Emeltchenko tx_skb->data + tx_skb->len - L2CAP_FCS_SIZE); 13980a708f8fSGustavo F. Padovan } 13990a708f8fSGustavo F. Padovan 14004343478fSGustavo F. Padovan l2cap_do_send(chan, tx_skb); 14010a708f8fSGustavo F. Padovan } 14020a708f8fSGustavo F. Padovan 140367c9e840SSzymon Janc static int l2cap_ertm_send(struct l2cap_chan *chan) 14040a708f8fSGustavo F. Padovan { 14050a708f8fSGustavo F. Padovan struct sk_buff *skb, *tx_skb; 140688843ab0SAndrei Emeltchenko u16 fcs; 140788843ab0SAndrei Emeltchenko u32 control; 14080a708f8fSGustavo F. Padovan int nsent = 0; 14090a708f8fSGustavo F. Padovan 141089bc500eSGustavo F. Padovan if (chan->state != BT_CONNECTED) 14110a708f8fSGustavo F. Padovan return -ENOTCONN; 14120a708f8fSGustavo F. Padovan 141358d35f87SGustavo F. Padovan while ((skb = chan->tx_send_head) && (!l2cap_tx_window_full(chan))) { 14140a708f8fSGustavo F. Padovan 14152c03a7a4SGustavo F. Padovan if (chan->remote_max_tx && 14162c03a7a4SGustavo F. Padovan bt_cb(skb)->retries == chan->remote_max_tx) { 14178c1d787bSGustavo F. Padovan l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); 14180a708f8fSGustavo F. Padovan break; 14190a708f8fSGustavo F. Padovan } 14200a708f8fSGustavo F. Padovan 14210a708f8fSGustavo F. Padovan tx_skb = skb_clone(skb, GFP_ATOMIC); 14220a708f8fSGustavo F. Padovan 14230a708f8fSGustavo F. Padovan bt_cb(skb)->retries++; 14240a708f8fSGustavo F. Padovan 142588843ab0SAndrei Emeltchenko control = __get_control(chan, tx_skb->data + L2CAP_HDR_SIZE); 14267e0ef6eeSAndrei Emeltchenko control &= __get_sar_mask(chan); 14270a708f8fSGustavo F. Padovan 1428e2ab4353SGustavo F. Padovan if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) 142903f6715dSAndrei Emeltchenko control |= __set_ctrl_final(chan); 1430e2ab4353SGustavo F. Padovan 14310b209faeSAndrei Emeltchenko control |= __set_reqseq(chan, chan->buffer_seq); 1432fb45de7dSAndrei Emeltchenko control |= __set_txseq(chan, chan->next_tx_seq); 14330a708f8fSGustavo F. Padovan 143488843ab0SAndrei Emeltchenko __put_control(chan, control, tx_skb->data + L2CAP_HDR_SIZE); 14350a708f8fSGustavo F. Padovan 143647d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) { 143703a51213SAndrei Emeltchenko fcs = crc16(0, (u8 *)skb->data, 143803a51213SAndrei Emeltchenko tx_skb->len - L2CAP_FCS_SIZE); 143903a51213SAndrei Emeltchenko put_unaligned_le16(fcs, skb->data + 144003a51213SAndrei Emeltchenko tx_skb->len - L2CAP_FCS_SIZE); 14410a708f8fSGustavo F. Padovan } 14420a708f8fSGustavo F. Padovan 14434343478fSGustavo F. Padovan l2cap_do_send(chan, tx_skb); 14440a708f8fSGustavo F. Padovan 14451a09bcb9SGustavo F. Padovan __set_retrans_timer(chan); 14460a708f8fSGustavo F. Padovan 144742e5c802SGustavo F. Padovan bt_cb(skb)->tx_seq = chan->next_tx_seq; 1448836be934SAndrei Emeltchenko 1449836be934SAndrei Emeltchenko chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq); 14500a708f8fSGustavo F. Padovan 145123e9fde2SSuraj Sumangala if (bt_cb(skb)->retries == 1) 14526a026610SGustavo F. Padovan chan->unacked_frames++; 145323e9fde2SSuraj Sumangala 14546a026610SGustavo F. Padovan chan->frames_sent++; 14550a708f8fSGustavo F. Padovan 145658d35f87SGustavo F. Padovan if (skb_queue_is_last(&chan->tx_q, skb)) 145758d35f87SGustavo F. Padovan chan->tx_send_head = NULL; 14580a708f8fSGustavo F. Padovan else 145958d35f87SGustavo F. Padovan chan->tx_send_head = skb_queue_next(&chan->tx_q, skb); 14600a708f8fSGustavo F. Padovan 14610a708f8fSGustavo F. Padovan nsent++; 14620a708f8fSGustavo F. Padovan } 14630a708f8fSGustavo F. Padovan 14640a708f8fSGustavo F. Padovan return nsent; 14650a708f8fSGustavo F. Padovan } 14660a708f8fSGustavo F. Padovan 1467525cd185SGustavo F. Padovan static int l2cap_retransmit_frames(struct l2cap_chan *chan) 14680a708f8fSGustavo F. Padovan { 14690a708f8fSGustavo F. Padovan int ret; 14700a708f8fSGustavo F. Padovan 147158d35f87SGustavo F. Padovan if (!skb_queue_empty(&chan->tx_q)) 147258d35f87SGustavo F. Padovan chan->tx_send_head = chan->tx_q.next; 14730a708f8fSGustavo F. Padovan 147442e5c802SGustavo F. Padovan chan->next_tx_seq = chan->expected_ack_seq; 1475525cd185SGustavo F. Padovan ret = l2cap_ertm_send(chan); 14760a708f8fSGustavo F. Padovan return ret; 14770a708f8fSGustavo F. Padovan } 14780a708f8fSGustavo F. Padovan 1479b17e73bbSSzymon Janc static void __l2cap_send_ack(struct l2cap_chan *chan) 14800a708f8fSGustavo F. Padovan { 148188843ab0SAndrei Emeltchenko u32 control = 0; 14820a708f8fSGustavo F. Padovan 14830b209faeSAndrei Emeltchenko control |= __set_reqseq(chan, chan->buffer_seq); 14840a708f8fSGustavo F. Padovan 1485e2ab4353SGustavo F. Padovan if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { 1486ab784b73SAndrei Emeltchenko control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); 1487e2ab4353SGustavo F. Padovan set_bit(CONN_RNR_SENT, &chan->conn_state); 1488525cd185SGustavo F. Padovan l2cap_send_sframe(chan, control); 14890a708f8fSGustavo F. Padovan return; 14900a708f8fSGustavo F. Padovan } 14910a708f8fSGustavo F. Padovan 1492525cd185SGustavo F. Padovan if (l2cap_ertm_send(chan) > 0) 14930a708f8fSGustavo F. Padovan return; 14940a708f8fSGustavo F. Padovan 1495ab784b73SAndrei Emeltchenko control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); 1496525cd185SGustavo F. Padovan l2cap_send_sframe(chan, control); 14970a708f8fSGustavo F. Padovan } 14980a708f8fSGustavo F. Padovan 1499b17e73bbSSzymon Janc static void l2cap_send_ack(struct l2cap_chan *chan) 1500b17e73bbSSzymon Janc { 1501b17e73bbSSzymon Janc __clear_ack_timer(chan); 1502b17e73bbSSzymon Janc __l2cap_send_ack(chan); 1503b17e73bbSSzymon Janc } 1504b17e73bbSSzymon Janc 1505525cd185SGustavo F. Padovan static void l2cap_send_srejtail(struct l2cap_chan *chan) 15060a708f8fSGustavo F. Padovan { 15070a708f8fSGustavo F. Padovan struct srej_list *tail; 150888843ab0SAndrei Emeltchenko u32 control; 15090a708f8fSGustavo F. Padovan 1510ab784b73SAndrei Emeltchenko control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); 151103f6715dSAndrei Emeltchenko control |= __set_ctrl_final(chan); 15120a708f8fSGustavo F. Padovan 151339d5a3eeSGustavo F. Padovan tail = list_entry((&chan->srej_l)->prev, struct srej_list, list); 15140b209faeSAndrei Emeltchenko control |= __set_reqseq(chan, tail->tx_seq); 15150a708f8fSGustavo F. Padovan 1516525cd185SGustavo F. Padovan l2cap_send_sframe(chan, control); 15170a708f8fSGustavo F. Padovan } 15180a708f8fSGustavo F. Padovan 15190952a57aSAndrei Emeltchenko static inline int l2cap_skbuff_fromiovec(struct l2cap_chan *chan, struct msghdr *msg, int len, int count, struct sk_buff *skb) 15200a708f8fSGustavo F. Padovan { 15210952a57aSAndrei Emeltchenko struct l2cap_conn *conn = chan->conn; 15220a708f8fSGustavo F. Padovan struct sk_buff **frag; 15230a708f8fSGustavo F. Padovan int err, sent = 0; 15240a708f8fSGustavo F. Padovan 15250a708f8fSGustavo F. Padovan if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) 15260a708f8fSGustavo F. Padovan return -EFAULT; 15270a708f8fSGustavo F. Padovan 15280a708f8fSGustavo F. Padovan sent += count; 15290a708f8fSGustavo F. Padovan len -= count; 15300a708f8fSGustavo F. Padovan 15310a708f8fSGustavo F. Padovan /* Continuation fragments (no L2CAP header) */ 15320a708f8fSGustavo F. Padovan frag = &skb_shinfo(skb)->frag_list; 15330a708f8fSGustavo F. Padovan while (len) { 15340a708f8fSGustavo F. Padovan count = min_t(unsigned int, conn->mtu, len); 15350a708f8fSGustavo F. Padovan 15362f7719ceSAndrei Emeltchenko *frag = chan->ops->alloc_skb(chan, count, 15372f7719ceSAndrei Emeltchenko msg->msg_flags & MSG_DONTWAIT, &err); 15382f7719ceSAndrei Emeltchenko 15390a708f8fSGustavo F. Padovan if (!*frag) 15400a708f8fSGustavo F. Padovan return err; 15410a708f8fSGustavo F. Padovan if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) 15420a708f8fSGustavo F. Padovan return -EFAULT; 15430a708f8fSGustavo F. Padovan 15445e59b791SLuiz Augusto von Dentz (*frag)->priority = skb->priority; 15455e59b791SLuiz Augusto von Dentz 15460a708f8fSGustavo F. Padovan sent += count; 15470a708f8fSGustavo F. Padovan len -= count; 15480a708f8fSGustavo F. Padovan 15490a708f8fSGustavo F. Padovan frag = &(*frag)->next; 15500a708f8fSGustavo F. Padovan } 15510a708f8fSGustavo F. Padovan 15520a708f8fSGustavo F. Padovan return sent; 15530a708f8fSGustavo F. Padovan } 15540a708f8fSGustavo F. Padovan 15555e59b791SLuiz Augusto von Dentz static struct sk_buff *l2cap_create_connless_pdu(struct l2cap_chan *chan, 15565e59b791SLuiz Augusto von Dentz struct msghdr *msg, size_t len, 15575e59b791SLuiz Augusto von Dentz u32 priority) 15580a708f8fSGustavo F. Padovan { 1559fe4128e0SGustavo F. Padovan struct sock *sk = chan->sk; 15608c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 15610a708f8fSGustavo F. Padovan struct sk_buff *skb; 156203a51213SAndrei Emeltchenko int err, count, hlen = L2CAP_HDR_SIZE + L2CAP_PSMLEN_SIZE; 15630a708f8fSGustavo F. Padovan struct l2cap_hdr *lh; 15640a708f8fSGustavo F. Padovan 15655e59b791SLuiz Augusto von Dentz BT_DBG("sk %p len %d priority %u", sk, (int)len, priority); 15660a708f8fSGustavo F. Padovan 15670a708f8fSGustavo F. Padovan count = min_t(unsigned int, (conn->mtu - hlen), len); 15682f7719ceSAndrei Emeltchenko 15692f7719ceSAndrei Emeltchenko skb = chan->ops->alloc_skb(chan, count + hlen, 15700a708f8fSGustavo F. Padovan msg->msg_flags & MSG_DONTWAIT, &err); 15712f7719ceSAndrei Emeltchenko 15720a708f8fSGustavo F. Padovan if (!skb) 15730a708f8fSGustavo F. Padovan return ERR_PTR(err); 15740a708f8fSGustavo F. Padovan 15755e59b791SLuiz Augusto von Dentz skb->priority = priority; 15765e59b791SLuiz Augusto von Dentz 15770a708f8fSGustavo F. Padovan /* Create L2CAP header */ 15780a708f8fSGustavo F. Padovan lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); 1579fe4128e0SGustavo F. Padovan lh->cid = cpu_to_le16(chan->dcid); 15800a708f8fSGustavo F. Padovan lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); 1581fe4128e0SGustavo F. Padovan put_unaligned_le16(chan->psm, skb_put(skb, 2)); 15820a708f8fSGustavo F. Padovan 15830952a57aSAndrei Emeltchenko err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); 15840a708f8fSGustavo F. Padovan if (unlikely(err < 0)) { 15850a708f8fSGustavo F. Padovan kfree_skb(skb); 15860a708f8fSGustavo F. Padovan return ERR_PTR(err); 15870a708f8fSGustavo F. Padovan } 15880a708f8fSGustavo F. Padovan return skb; 15890a708f8fSGustavo F. Padovan } 15900a708f8fSGustavo F. Padovan 15915e59b791SLuiz Augusto von Dentz static struct sk_buff *l2cap_create_basic_pdu(struct l2cap_chan *chan, 15925e59b791SLuiz Augusto von Dentz struct msghdr *msg, size_t len, 15935e59b791SLuiz Augusto von Dentz u32 priority) 15940a708f8fSGustavo F. Padovan { 1595fe4128e0SGustavo F. Padovan struct sock *sk = chan->sk; 15968c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 15970a708f8fSGustavo F. Padovan struct sk_buff *skb; 15980a708f8fSGustavo F. Padovan int err, count, hlen = L2CAP_HDR_SIZE; 15990a708f8fSGustavo F. Padovan struct l2cap_hdr *lh; 16000a708f8fSGustavo F. Padovan 16010a708f8fSGustavo F. Padovan BT_DBG("sk %p len %d", sk, (int)len); 16020a708f8fSGustavo F. Padovan 16030a708f8fSGustavo F. Padovan count = min_t(unsigned int, (conn->mtu - hlen), len); 16042f7719ceSAndrei Emeltchenko 16052f7719ceSAndrei Emeltchenko skb = chan->ops->alloc_skb(chan, count + hlen, 16060a708f8fSGustavo F. Padovan msg->msg_flags & MSG_DONTWAIT, &err); 16072f7719ceSAndrei Emeltchenko 16080a708f8fSGustavo F. Padovan if (!skb) 16090a708f8fSGustavo F. Padovan return ERR_PTR(err); 16100a708f8fSGustavo F. Padovan 16115e59b791SLuiz Augusto von Dentz skb->priority = priority; 16125e59b791SLuiz Augusto von Dentz 16130a708f8fSGustavo F. Padovan /* Create L2CAP header */ 16140a708f8fSGustavo F. Padovan lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); 1615fe4128e0SGustavo F. Padovan lh->cid = cpu_to_le16(chan->dcid); 16160a708f8fSGustavo F. Padovan lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); 16170a708f8fSGustavo F. Padovan 16180952a57aSAndrei Emeltchenko err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); 16190a708f8fSGustavo F. Padovan if (unlikely(err < 0)) { 16200a708f8fSGustavo F. Padovan kfree_skb(skb); 16210a708f8fSGustavo F. Padovan return ERR_PTR(err); 16220a708f8fSGustavo F. Padovan } 16230a708f8fSGustavo F. Padovan return skb; 16240a708f8fSGustavo F. Padovan } 16250a708f8fSGustavo F. Padovan 1626ab0ff76dSLuiz Augusto von Dentz static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan, 1627ab0ff76dSLuiz Augusto von Dentz struct msghdr *msg, size_t len, 162888843ab0SAndrei Emeltchenko u32 control, u16 sdulen) 16290a708f8fSGustavo F. Padovan { 163047d1ec61SGustavo F. Padovan struct sock *sk = chan->sk; 16318c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 16320a708f8fSGustavo F. Padovan struct sk_buff *skb; 1633e4ca6d98SAndrei Emeltchenko int err, count, hlen; 16340a708f8fSGustavo F. Padovan struct l2cap_hdr *lh; 16350a708f8fSGustavo F. Padovan 16360a708f8fSGustavo F. Padovan BT_DBG("sk %p len %d", sk, (int)len); 16370a708f8fSGustavo F. Padovan 16380a708f8fSGustavo F. Padovan if (!conn) 16390a708f8fSGustavo F. Padovan return ERR_PTR(-ENOTCONN); 16400a708f8fSGustavo F. Padovan 1641e4ca6d98SAndrei Emeltchenko if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 1642e4ca6d98SAndrei Emeltchenko hlen = L2CAP_EXT_HDR_SIZE; 1643e4ca6d98SAndrei Emeltchenko else 1644e4ca6d98SAndrei Emeltchenko hlen = L2CAP_ENH_HDR_SIZE; 1645e4ca6d98SAndrei Emeltchenko 16460a708f8fSGustavo F. Padovan if (sdulen) 164703a51213SAndrei Emeltchenko hlen += L2CAP_SDULEN_SIZE; 16480a708f8fSGustavo F. Padovan 164947d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) 165003a51213SAndrei Emeltchenko hlen += L2CAP_FCS_SIZE; 16510a708f8fSGustavo F. Padovan 16520a708f8fSGustavo F. Padovan count = min_t(unsigned int, (conn->mtu - hlen), len); 16532f7719ceSAndrei Emeltchenko 16542f7719ceSAndrei Emeltchenko skb = chan->ops->alloc_skb(chan, count + hlen, 16550a708f8fSGustavo F. Padovan msg->msg_flags & MSG_DONTWAIT, &err); 16562f7719ceSAndrei Emeltchenko 16570a708f8fSGustavo F. Padovan if (!skb) 16580a708f8fSGustavo F. Padovan return ERR_PTR(err); 16590a708f8fSGustavo F. Padovan 16600a708f8fSGustavo F. Padovan /* Create L2CAP header */ 16610a708f8fSGustavo F. Padovan lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); 1662fe4128e0SGustavo F. Padovan lh->cid = cpu_to_le16(chan->dcid); 16630a708f8fSGustavo F. Padovan lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); 166488843ab0SAndrei Emeltchenko 166588843ab0SAndrei Emeltchenko __put_control(chan, control, skb_put(skb, __ctrl_size(chan))); 166688843ab0SAndrei Emeltchenko 16670a708f8fSGustavo F. Padovan if (sdulen) 166803a51213SAndrei Emeltchenko put_unaligned_le16(sdulen, skb_put(skb, L2CAP_SDULEN_SIZE)); 16690a708f8fSGustavo F. Padovan 16700952a57aSAndrei Emeltchenko err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); 16710a708f8fSGustavo F. Padovan if (unlikely(err < 0)) { 16720a708f8fSGustavo F. Padovan kfree_skb(skb); 16730a708f8fSGustavo F. Padovan return ERR_PTR(err); 16740a708f8fSGustavo F. Padovan } 16750a708f8fSGustavo F. Padovan 167647d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) 167703a51213SAndrei Emeltchenko put_unaligned_le16(0, skb_put(skb, L2CAP_FCS_SIZE)); 16780a708f8fSGustavo F. Padovan 16790a708f8fSGustavo F. Padovan bt_cb(skb)->retries = 0; 16800a708f8fSGustavo F. Padovan return skb; 16810a708f8fSGustavo F. Padovan } 16820a708f8fSGustavo F. Padovan 168367c9e840SSzymon Janc static int l2cap_sar_segment_sdu(struct l2cap_chan *chan, struct msghdr *msg, size_t len) 16840a708f8fSGustavo F. Padovan { 16850a708f8fSGustavo F. Padovan struct sk_buff *skb; 16860a708f8fSGustavo F. Padovan struct sk_buff_head sar_queue; 168788843ab0SAndrei Emeltchenko u32 control; 16880a708f8fSGustavo F. Padovan size_t size = 0; 16890a708f8fSGustavo F. Padovan 16900a708f8fSGustavo F. Padovan skb_queue_head_init(&sar_queue); 16917e0ef6eeSAndrei Emeltchenko control = __set_ctrl_sar(chan, L2CAP_SAR_START); 169247d1ec61SGustavo F. Padovan skb = l2cap_create_iframe_pdu(chan, msg, chan->remote_mps, control, len); 16930a708f8fSGustavo F. Padovan if (IS_ERR(skb)) 16940a708f8fSGustavo F. Padovan return PTR_ERR(skb); 16950a708f8fSGustavo F. Padovan 16960a708f8fSGustavo F. Padovan __skb_queue_tail(&sar_queue, skb); 16972c03a7a4SGustavo F. Padovan len -= chan->remote_mps; 16982c03a7a4SGustavo F. Padovan size += chan->remote_mps; 16990a708f8fSGustavo F. Padovan 17000a708f8fSGustavo F. Padovan while (len > 0) { 17010a708f8fSGustavo F. Padovan size_t buflen; 17020a708f8fSGustavo F. Padovan 17032c03a7a4SGustavo F. Padovan if (len > chan->remote_mps) { 17047e0ef6eeSAndrei Emeltchenko control = __set_ctrl_sar(chan, L2CAP_SAR_CONTINUE); 17052c03a7a4SGustavo F. Padovan buflen = chan->remote_mps; 17060a708f8fSGustavo F. Padovan } else { 17077e0ef6eeSAndrei Emeltchenko control = __set_ctrl_sar(chan, L2CAP_SAR_END); 17080a708f8fSGustavo F. Padovan buflen = len; 17090a708f8fSGustavo F. Padovan } 17100a708f8fSGustavo F. Padovan 171147d1ec61SGustavo F. Padovan skb = l2cap_create_iframe_pdu(chan, msg, buflen, control, 0); 17120a708f8fSGustavo F. Padovan if (IS_ERR(skb)) { 17130a708f8fSGustavo F. Padovan skb_queue_purge(&sar_queue); 17140a708f8fSGustavo F. Padovan return PTR_ERR(skb); 17150a708f8fSGustavo F. Padovan } 17160a708f8fSGustavo F. Padovan 17170a708f8fSGustavo F. Padovan __skb_queue_tail(&sar_queue, skb); 17180a708f8fSGustavo F. Padovan len -= buflen; 17190a708f8fSGustavo F. Padovan size += buflen; 17200a708f8fSGustavo F. Padovan } 172158d35f87SGustavo F. Padovan skb_queue_splice_tail(&sar_queue, &chan->tx_q); 172258d35f87SGustavo F. Padovan if (chan->tx_send_head == NULL) 172358d35f87SGustavo F. Padovan chan->tx_send_head = sar_queue.next; 17240a708f8fSGustavo F. Padovan 17250a708f8fSGustavo F. Padovan return size; 17260a708f8fSGustavo F. Padovan } 17270a708f8fSGustavo F. Padovan 17285e59b791SLuiz Augusto von Dentz int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, 17295e59b791SLuiz Augusto von Dentz u32 priority) 17309a91a04aSGustavo F. Padovan { 17319a91a04aSGustavo F. Padovan struct sk_buff *skb; 173288843ab0SAndrei Emeltchenko u32 control; 17339a91a04aSGustavo F. Padovan int err; 17349a91a04aSGustavo F. Padovan 17359a91a04aSGustavo F. Padovan /* Connectionless channel */ 1736715ec005SGustavo F. Padovan if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { 17375e59b791SLuiz Augusto von Dentz skb = l2cap_create_connless_pdu(chan, msg, len, priority); 17389a91a04aSGustavo F. Padovan if (IS_ERR(skb)) 17399a91a04aSGustavo F. Padovan return PTR_ERR(skb); 17409a91a04aSGustavo F. Padovan 17419a91a04aSGustavo F. Padovan l2cap_do_send(chan, skb); 17429a91a04aSGustavo F. Padovan return len; 17439a91a04aSGustavo F. Padovan } 17449a91a04aSGustavo F. Padovan 17459a91a04aSGustavo F. Padovan switch (chan->mode) { 17469a91a04aSGustavo F. Padovan case L2CAP_MODE_BASIC: 17479a91a04aSGustavo F. Padovan /* Check outgoing MTU */ 17489a91a04aSGustavo F. Padovan if (len > chan->omtu) 17499a91a04aSGustavo F. Padovan return -EMSGSIZE; 17509a91a04aSGustavo F. Padovan 17519a91a04aSGustavo F. Padovan /* Create a basic PDU */ 17525e59b791SLuiz Augusto von Dentz skb = l2cap_create_basic_pdu(chan, msg, len, priority); 17539a91a04aSGustavo F. Padovan if (IS_ERR(skb)) 17549a91a04aSGustavo F. Padovan return PTR_ERR(skb); 17559a91a04aSGustavo F. Padovan 17569a91a04aSGustavo F. Padovan l2cap_do_send(chan, skb); 17579a91a04aSGustavo F. Padovan err = len; 17589a91a04aSGustavo F. Padovan break; 17599a91a04aSGustavo F. Padovan 17609a91a04aSGustavo F. Padovan case L2CAP_MODE_ERTM: 17619a91a04aSGustavo F. Padovan case L2CAP_MODE_STREAMING: 17629a91a04aSGustavo F. Padovan /* Entire SDU fits into one PDU */ 17639a91a04aSGustavo F. Padovan if (len <= chan->remote_mps) { 17647e0ef6eeSAndrei Emeltchenko control = __set_ctrl_sar(chan, L2CAP_SAR_UNSEGMENTED); 17659a91a04aSGustavo F. Padovan skb = l2cap_create_iframe_pdu(chan, msg, len, control, 17669a91a04aSGustavo F. Padovan 0); 17679a91a04aSGustavo F. Padovan if (IS_ERR(skb)) 17689a91a04aSGustavo F. Padovan return PTR_ERR(skb); 17699a91a04aSGustavo F. Padovan 17709a91a04aSGustavo F. Padovan __skb_queue_tail(&chan->tx_q, skb); 17719a91a04aSGustavo F. Padovan 17729a91a04aSGustavo F. Padovan if (chan->tx_send_head == NULL) 17739a91a04aSGustavo F. Padovan chan->tx_send_head = skb; 17749a91a04aSGustavo F. Padovan 17759a91a04aSGustavo F. Padovan } else { 17769a91a04aSGustavo F. Padovan /* Segment SDU into multiples PDUs */ 17779a91a04aSGustavo F. Padovan err = l2cap_sar_segment_sdu(chan, msg, len); 17789a91a04aSGustavo F. Padovan if (err < 0) 17799a91a04aSGustavo F. Padovan return err; 17809a91a04aSGustavo F. Padovan } 17819a91a04aSGustavo F. Padovan 17829a91a04aSGustavo F. Padovan if (chan->mode == L2CAP_MODE_STREAMING) { 17839a91a04aSGustavo F. Padovan l2cap_streaming_send(chan); 17849a91a04aSGustavo F. Padovan err = len; 17859a91a04aSGustavo F. Padovan break; 17869a91a04aSGustavo F. Padovan } 17879a91a04aSGustavo F. Padovan 1788e2ab4353SGustavo F. Padovan if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && 1789e2ab4353SGustavo F. Padovan test_bit(CONN_WAIT_F, &chan->conn_state)) { 17909a91a04aSGustavo F. Padovan err = len; 17919a91a04aSGustavo F. Padovan break; 17929a91a04aSGustavo F. Padovan } 17939a91a04aSGustavo F. Padovan 17949a91a04aSGustavo F. Padovan err = l2cap_ertm_send(chan); 17959a91a04aSGustavo F. Padovan if (err >= 0) 17969a91a04aSGustavo F. Padovan err = len; 17979a91a04aSGustavo F. Padovan 17989a91a04aSGustavo F. Padovan break; 17999a91a04aSGustavo F. Padovan 18009a91a04aSGustavo F. Padovan default: 18019a91a04aSGustavo F. Padovan BT_DBG("bad state %1.1x", chan->mode); 18029a91a04aSGustavo F. Padovan err = -EBADFD; 18039a91a04aSGustavo F. Padovan } 18049a91a04aSGustavo F. Padovan 18059a91a04aSGustavo F. Padovan return err; 18069a91a04aSGustavo F. Padovan } 18079a91a04aSGustavo F. Padovan 18080a708f8fSGustavo F. Padovan /* Copy frame to all raw sockets on that connection */ 18090a708f8fSGustavo F. Padovan static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) 18100a708f8fSGustavo F. Padovan { 18110a708f8fSGustavo F. Padovan struct sk_buff *nskb; 181248454079SGustavo F. Padovan struct l2cap_chan *chan; 18130a708f8fSGustavo F. Padovan 18140a708f8fSGustavo F. Padovan BT_DBG("conn %p", conn); 18150a708f8fSGustavo F. Padovan 18163d57dc68SGustavo F. Padovan rcu_read_lock(); 18173d57dc68SGustavo F. Padovan 18183d57dc68SGustavo F. Padovan list_for_each_entry_rcu(chan, &conn->chan_l, list) { 181948454079SGustavo F. Padovan struct sock *sk = chan->sk; 1820715ec005SGustavo F. Padovan if (chan->chan_type != L2CAP_CHAN_RAW) 18210a708f8fSGustavo F. Padovan continue; 18220a708f8fSGustavo F. Padovan 18230a708f8fSGustavo F. Padovan /* Don't send frame to the socket it came from */ 18240a708f8fSGustavo F. Padovan if (skb->sk == sk) 18250a708f8fSGustavo F. Padovan continue; 18260a708f8fSGustavo F. Padovan nskb = skb_clone(skb, GFP_ATOMIC); 18270a708f8fSGustavo F. Padovan if (!nskb) 18280a708f8fSGustavo F. Padovan continue; 18290a708f8fSGustavo F. Padovan 183023070494SGustavo F. Padovan if (chan->ops->recv(chan->data, nskb)) 18310a708f8fSGustavo F. Padovan kfree_skb(nskb); 18320a708f8fSGustavo F. Padovan } 18333d57dc68SGustavo F. Padovan 18343d57dc68SGustavo F. Padovan rcu_read_unlock(); 18350a708f8fSGustavo F. Padovan } 18360a708f8fSGustavo F. Padovan 18370a708f8fSGustavo F. Padovan /* ---- L2CAP signalling commands ---- */ 18380a708f8fSGustavo F. Padovan static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, 18390a708f8fSGustavo F. Padovan u8 code, u8 ident, u16 dlen, void *data) 18400a708f8fSGustavo F. Padovan { 18410a708f8fSGustavo F. Padovan struct sk_buff *skb, **frag; 18420a708f8fSGustavo F. Padovan struct l2cap_cmd_hdr *cmd; 18430a708f8fSGustavo F. Padovan struct l2cap_hdr *lh; 18440a708f8fSGustavo F. Padovan int len, count; 18450a708f8fSGustavo F. Padovan 18460a708f8fSGustavo F. Padovan BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", 18470a708f8fSGustavo F. Padovan conn, code, ident, dlen); 18480a708f8fSGustavo F. Padovan 18490a708f8fSGustavo F. Padovan len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; 18500a708f8fSGustavo F. Padovan count = min_t(unsigned int, conn->mtu, len); 18510a708f8fSGustavo F. Padovan 18520a708f8fSGustavo F. Padovan skb = bt_skb_alloc(count, GFP_ATOMIC); 18530a708f8fSGustavo F. Padovan if (!skb) 18540a708f8fSGustavo F. Padovan return NULL; 18550a708f8fSGustavo F. Padovan 18560a708f8fSGustavo F. Padovan lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); 18570a708f8fSGustavo F. Padovan lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); 18583300d9a9SClaudio Takahasi 18593300d9a9SClaudio Takahasi if (conn->hcon->type == LE_LINK) 18603300d9a9SClaudio Takahasi lh->cid = cpu_to_le16(L2CAP_CID_LE_SIGNALING); 18613300d9a9SClaudio Takahasi else 18620a708f8fSGustavo F. Padovan lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); 18630a708f8fSGustavo F. Padovan 18640a708f8fSGustavo F. Padovan cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); 18650a708f8fSGustavo F. Padovan cmd->code = code; 18660a708f8fSGustavo F. Padovan cmd->ident = ident; 18670a708f8fSGustavo F. Padovan cmd->len = cpu_to_le16(dlen); 18680a708f8fSGustavo F. Padovan 18690a708f8fSGustavo F. Padovan if (dlen) { 18700a708f8fSGustavo F. Padovan count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; 18710a708f8fSGustavo F. Padovan memcpy(skb_put(skb, count), data, count); 18720a708f8fSGustavo F. Padovan data += count; 18730a708f8fSGustavo F. Padovan } 18740a708f8fSGustavo F. Padovan 18750a708f8fSGustavo F. Padovan len -= skb->len; 18760a708f8fSGustavo F. Padovan 18770a708f8fSGustavo F. Padovan /* Continuation fragments (no L2CAP header) */ 18780a708f8fSGustavo F. Padovan frag = &skb_shinfo(skb)->frag_list; 18790a708f8fSGustavo F. Padovan while (len) { 18800a708f8fSGustavo F. Padovan count = min_t(unsigned int, conn->mtu, len); 18810a708f8fSGustavo F. Padovan 18820a708f8fSGustavo F. Padovan *frag = bt_skb_alloc(count, GFP_ATOMIC); 18830a708f8fSGustavo F. Padovan if (!*frag) 18840a708f8fSGustavo F. Padovan goto fail; 18850a708f8fSGustavo F. Padovan 18860a708f8fSGustavo F. Padovan memcpy(skb_put(*frag, count), data, count); 18870a708f8fSGustavo F. Padovan 18880a708f8fSGustavo F. Padovan len -= count; 18890a708f8fSGustavo F. Padovan data += count; 18900a708f8fSGustavo F. Padovan 18910a708f8fSGustavo F. Padovan frag = &(*frag)->next; 18920a708f8fSGustavo F. Padovan } 18930a708f8fSGustavo F. Padovan 18940a708f8fSGustavo F. Padovan return skb; 18950a708f8fSGustavo F. Padovan 18960a708f8fSGustavo F. Padovan fail: 18970a708f8fSGustavo F. Padovan kfree_skb(skb); 18980a708f8fSGustavo F. Padovan return NULL; 18990a708f8fSGustavo F. Padovan } 19000a708f8fSGustavo F. Padovan 19010a708f8fSGustavo F. Padovan static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) 19020a708f8fSGustavo F. Padovan { 19030a708f8fSGustavo F. Padovan struct l2cap_conf_opt *opt = *ptr; 19040a708f8fSGustavo F. Padovan int len; 19050a708f8fSGustavo F. Padovan 19060a708f8fSGustavo F. Padovan len = L2CAP_CONF_OPT_SIZE + opt->len; 19070a708f8fSGustavo F. Padovan *ptr += len; 19080a708f8fSGustavo F. Padovan 19090a708f8fSGustavo F. Padovan *type = opt->type; 19100a708f8fSGustavo F. Padovan *olen = opt->len; 19110a708f8fSGustavo F. Padovan 19120a708f8fSGustavo F. Padovan switch (opt->len) { 19130a708f8fSGustavo F. Padovan case 1: 19140a708f8fSGustavo F. Padovan *val = *((u8 *) opt->val); 19150a708f8fSGustavo F. Padovan break; 19160a708f8fSGustavo F. Padovan 19170a708f8fSGustavo F. Padovan case 2: 19180a708f8fSGustavo F. Padovan *val = get_unaligned_le16(opt->val); 19190a708f8fSGustavo F. Padovan break; 19200a708f8fSGustavo F. Padovan 19210a708f8fSGustavo F. Padovan case 4: 19220a708f8fSGustavo F. Padovan *val = get_unaligned_le32(opt->val); 19230a708f8fSGustavo F. Padovan break; 19240a708f8fSGustavo F. Padovan 19250a708f8fSGustavo F. Padovan default: 19260a708f8fSGustavo F. Padovan *val = (unsigned long) opt->val; 19270a708f8fSGustavo F. Padovan break; 19280a708f8fSGustavo F. Padovan } 19290a708f8fSGustavo F. Padovan 19300a708f8fSGustavo F. Padovan BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); 19310a708f8fSGustavo F. Padovan return len; 19320a708f8fSGustavo F. Padovan } 19330a708f8fSGustavo F. Padovan 19340a708f8fSGustavo F. Padovan static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) 19350a708f8fSGustavo F. Padovan { 19360a708f8fSGustavo F. Padovan struct l2cap_conf_opt *opt = *ptr; 19370a708f8fSGustavo F. Padovan 19380a708f8fSGustavo F. Padovan BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); 19390a708f8fSGustavo F. Padovan 19400a708f8fSGustavo F. Padovan opt->type = type; 19410a708f8fSGustavo F. Padovan opt->len = len; 19420a708f8fSGustavo F. Padovan 19430a708f8fSGustavo F. Padovan switch (len) { 19440a708f8fSGustavo F. Padovan case 1: 19450a708f8fSGustavo F. Padovan *((u8 *) opt->val) = val; 19460a708f8fSGustavo F. Padovan break; 19470a708f8fSGustavo F. Padovan 19480a708f8fSGustavo F. Padovan case 2: 19490a708f8fSGustavo F. Padovan put_unaligned_le16(val, opt->val); 19500a708f8fSGustavo F. Padovan break; 19510a708f8fSGustavo F. Padovan 19520a708f8fSGustavo F. Padovan case 4: 19530a708f8fSGustavo F. Padovan put_unaligned_le32(val, opt->val); 19540a708f8fSGustavo F. Padovan break; 19550a708f8fSGustavo F. Padovan 19560a708f8fSGustavo F. Padovan default: 19570a708f8fSGustavo F. Padovan memcpy(opt->val, (void *) val, len); 19580a708f8fSGustavo F. Padovan break; 19590a708f8fSGustavo F. Padovan } 19600a708f8fSGustavo F. Padovan 19610a708f8fSGustavo F. Padovan *ptr += L2CAP_CONF_OPT_SIZE + len; 19620a708f8fSGustavo F. Padovan } 19630a708f8fSGustavo F. Padovan 1964f89cef09SAndrei Emeltchenko static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan) 1965f89cef09SAndrei Emeltchenko { 1966f89cef09SAndrei Emeltchenko struct l2cap_conf_efs efs; 1967f89cef09SAndrei Emeltchenko 1968f89cef09SAndrei Emeltchenko switch (chan->mode) { 1969f89cef09SAndrei Emeltchenko case L2CAP_MODE_ERTM: 1970f89cef09SAndrei Emeltchenko efs.id = chan->local_id; 1971f89cef09SAndrei Emeltchenko efs.stype = chan->local_stype; 1972f89cef09SAndrei Emeltchenko efs.msdu = cpu_to_le16(chan->local_msdu); 1973f89cef09SAndrei Emeltchenko efs.sdu_itime = cpu_to_le32(chan->local_sdu_itime); 1974f89cef09SAndrei Emeltchenko efs.acc_lat = cpu_to_le32(L2CAP_DEFAULT_ACC_LAT); 1975f89cef09SAndrei Emeltchenko efs.flush_to = cpu_to_le32(L2CAP_DEFAULT_FLUSH_TO); 1976f89cef09SAndrei Emeltchenko break; 1977f89cef09SAndrei Emeltchenko 1978f89cef09SAndrei Emeltchenko case L2CAP_MODE_STREAMING: 1979f89cef09SAndrei Emeltchenko efs.id = 1; 1980f89cef09SAndrei Emeltchenko efs.stype = L2CAP_SERV_BESTEFFORT; 1981f89cef09SAndrei Emeltchenko efs.msdu = cpu_to_le16(chan->local_msdu); 1982f89cef09SAndrei Emeltchenko efs.sdu_itime = cpu_to_le32(chan->local_sdu_itime); 1983f89cef09SAndrei Emeltchenko efs.acc_lat = 0; 1984f89cef09SAndrei Emeltchenko efs.flush_to = 0; 1985f89cef09SAndrei Emeltchenko break; 1986f89cef09SAndrei Emeltchenko 1987f89cef09SAndrei Emeltchenko default: 1988f89cef09SAndrei Emeltchenko return; 1989f89cef09SAndrei Emeltchenko } 1990f89cef09SAndrei Emeltchenko 1991f89cef09SAndrei Emeltchenko l2cap_add_conf_opt(ptr, L2CAP_CONF_EFS, sizeof(efs), 1992f89cef09SAndrei Emeltchenko (unsigned long) &efs); 1993f89cef09SAndrei Emeltchenko } 1994f89cef09SAndrei Emeltchenko 1995721c4181SGustavo F. Padovan static void l2cap_ack_timeout(struct work_struct *work) 19960a708f8fSGustavo F. Padovan { 1997721c4181SGustavo F. Padovan struct l2cap_chan *chan = container_of(work, struct l2cap_chan, 1998721c4181SGustavo F. Padovan ack_timer.work); 19990a708f8fSGustavo F. Padovan 20002fb9b3d4SGustavo F. Padovan BT_DBG("chan %p", chan); 20012fb9b3d4SGustavo F. Padovan 2002721c4181SGustavo F. Padovan lock_sock(chan->sk); 2003b17e73bbSSzymon Janc __l2cap_send_ack(chan); 2004721c4181SGustavo F. Padovan release_sock(chan->sk); 200509bfb2eeSSzymon Janc 200609bfb2eeSSzymon Janc l2cap_chan_put(chan); 20070a708f8fSGustavo F. Padovan } 20080a708f8fSGustavo F. Padovan 2009525cd185SGustavo F. Padovan static inline void l2cap_ertm_init(struct l2cap_chan *chan) 20100a708f8fSGustavo F. Padovan { 201142e5c802SGustavo F. Padovan chan->expected_ack_seq = 0; 20126a026610SGustavo F. Padovan chan->unacked_frames = 0; 201342e5c802SGustavo F. Padovan chan->buffer_seq = 0; 20146a026610SGustavo F. Padovan chan->num_acked = 0; 20156a026610SGustavo F. Padovan chan->frames_sent = 0; 20160a708f8fSGustavo F. Padovan 2017721c4181SGustavo F. Padovan INIT_DELAYED_WORK(&chan->retrans_timer, l2cap_retrans_timeout); 2018721c4181SGustavo F. Padovan INIT_DELAYED_WORK(&chan->monitor_timer, l2cap_monitor_timeout); 2019721c4181SGustavo F. Padovan INIT_DELAYED_WORK(&chan->ack_timer, l2cap_ack_timeout); 20200a708f8fSGustavo F. Padovan 2021f1c6775bSGustavo F. Padovan skb_queue_head_init(&chan->srej_q); 20220a708f8fSGustavo F. Padovan 202339d5a3eeSGustavo F. Padovan INIT_LIST_HEAD(&chan->srej_l); 20240a708f8fSGustavo F. Padovan } 20250a708f8fSGustavo F. Padovan 20260a708f8fSGustavo F. Padovan static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) 20270a708f8fSGustavo F. Padovan { 20280a708f8fSGustavo F. Padovan switch (mode) { 20290a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 20300a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 20310a708f8fSGustavo F. Padovan if (l2cap_mode_supported(mode, remote_feat_mask)) 20320a708f8fSGustavo F. Padovan return mode; 20330a708f8fSGustavo F. Padovan /* fall through */ 20340a708f8fSGustavo F. Padovan default: 20350a708f8fSGustavo F. Padovan return L2CAP_MODE_BASIC; 20360a708f8fSGustavo F. Padovan } 20370a708f8fSGustavo F. Padovan } 20380a708f8fSGustavo F. Padovan 20396327eb98SAndrei Emeltchenko static inline bool __l2cap_ews_supported(struct l2cap_chan *chan) 20406327eb98SAndrei Emeltchenko { 20416327eb98SAndrei Emeltchenko return enable_hs && chan->conn->feat_mask & L2CAP_FEAT_EXT_WINDOW; 20426327eb98SAndrei Emeltchenko } 20436327eb98SAndrei Emeltchenko 2044f89cef09SAndrei Emeltchenko static inline bool __l2cap_efs_supported(struct l2cap_chan *chan) 2045f89cef09SAndrei Emeltchenko { 2046f89cef09SAndrei Emeltchenko return enable_hs && chan->conn->feat_mask & L2CAP_FEAT_EXT_FLOW; 2047f89cef09SAndrei Emeltchenko } 2048f89cef09SAndrei Emeltchenko 20496327eb98SAndrei Emeltchenko static inline void l2cap_txwin_setup(struct l2cap_chan *chan) 20506327eb98SAndrei Emeltchenko { 20516327eb98SAndrei Emeltchenko if (chan->tx_win > L2CAP_DEFAULT_TX_WINDOW && 2052836be934SAndrei Emeltchenko __l2cap_ews_supported(chan)) { 20536327eb98SAndrei Emeltchenko /* use extended control field */ 20546327eb98SAndrei Emeltchenko set_bit(FLAG_EXT_CTRL, &chan->flags); 2055836be934SAndrei Emeltchenko chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW; 2056836be934SAndrei Emeltchenko } else { 20576327eb98SAndrei Emeltchenko chan->tx_win = min_t(u16, chan->tx_win, 20586327eb98SAndrei Emeltchenko L2CAP_DEFAULT_TX_WINDOW); 2059836be934SAndrei Emeltchenko chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW; 2060836be934SAndrei Emeltchenko } 20616327eb98SAndrei Emeltchenko } 20626327eb98SAndrei Emeltchenko 2063710f9b0aSGustavo F. Padovan static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data) 20640a708f8fSGustavo F. Padovan { 20650a708f8fSGustavo F. Padovan struct l2cap_conf_req *req = data; 20660c1bc5c6SGustavo F. Padovan struct l2cap_conf_rfc rfc = { .mode = chan->mode }; 20670a708f8fSGustavo F. Padovan void *ptr = req->data; 2068c8f79162SAndrei Emeltchenko u16 size; 20690a708f8fSGustavo F. Padovan 207049208c9cSGustavo F. Padovan BT_DBG("chan %p", chan); 20710a708f8fSGustavo F. Padovan 207273ffa904SGustavo F. Padovan if (chan->num_conf_req || chan->num_conf_rsp) 20730a708f8fSGustavo F. Padovan goto done; 20740a708f8fSGustavo F. Padovan 20750c1bc5c6SGustavo F. Padovan switch (chan->mode) { 20760a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 20770a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 2078c1360a1cSGustavo F. Padovan if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) 20790a708f8fSGustavo F. Padovan break; 20800a708f8fSGustavo F. Padovan 2081f89cef09SAndrei Emeltchenko if (__l2cap_efs_supported(chan)) 2082f89cef09SAndrei Emeltchenko set_bit(FLAG_EFS_ENABLE, &chan->flags); 2083f89cef09SAndrei Emeltchenko 20840a708f8fSGustavo F. Padovan /* fall through */ 20850a708f8fSGustavo F. Padovan default: 20868c1d787bSGustavo F. Padovan chan->mode = l2cap_select_mode(rfc.mode, chan->conn->feat_mask); 20870a708f8fSGustavo F. Padovan break; 20880a708f8fSGustavo F. Padovan } 20890a708f8fSGustavo F. Padovan 20900a708f8fSGustavo F. Padovan done: 20910c1bc5c6SGustavo F. Padovan if (chan->imtu != L2CAP_DEFAULT_MTU) 20920c1bc5c6SGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); 20930a708f8fSGustavo F. Padovan 20940c1bc5c6SGustavo F. Padovan switch (chan->mode) { 20950a708f8fSGustavo F. Padovan case L2CAP_MODE_BASIC: 20968c1d787bSGustavo F. Padovan if (!(chan->conn->feat_mask & L2CAP_FEAT_ERTM) && 20978c1d787bSGustavo F. Padovan !(chan->conn->feat_mask & L2CAP_FEAT_STREAMING)) 20980a708f8fSGustavo F. Padovan break; 20990a708f8fSGustavo F. Padovan 21000a708f8fSGustavo F. Padovan rfc.mode = L2CAP_MODE_BASIC; 21010a708f8fSGustavo F. Padovan rfc.txwin_size = 0; 21020a708f8fSGustavo F. Padovan rfc.max_transmit = 0; 21030a708f8fSGustavo F. Padovan rfc.retrans_timeout = 0; 21040a708f8fSGustavo F. Padovan rfc.monitor_timeout = 0; 21050a708f8fSGustavo F. Padovan rfc.max_pdu_size = 0; 21060a708f8fSGustavo F. Padovan 21070a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), 21080a708f8fSGustavo F. Padovan (unsigned long) &rfc); 21090a708f8fSGustavo F. Padovan break; 21100a708f8fSGustavo F. Padovan 21110a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 21120a708f8fSGustavo F. Padovan rfc.mode = L2CAP_MODE_ERTM; 211347d1ec61SGustavo F. Padovan rfc.max_transmit = chan->max_tx; 21140a708f8fSGustavo F. Padovan rfc.retrans_timeout = 0; 21150a708f8fSGustavo F. Padovan rfc.monitor_timeout = 0; 2116c8f79162SAndrei Emeltchenko 2117c8f79162SAndrei Emeltchenko size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu - 2118c8f79162SAndrei Emeltchenko L2CAP_EXT_HDR_SIZE - 2119c8f79162SAndrei Emeltchenko L2CAP_SDULEN_SIZE - 2120c8f79162SAndrei Emeltchenko L2CAP_FCS_SIZE); 2121c8f79162SAndrei Emeltchenko rfc.max_pdu_size = cpu_to_le16(size); 21220a708f8fSGustavo F. Padovan 21236327eb98SAndrei Emeltchenko l2cap_txwin_setup(chan); 21246327eb98SAndrei Emeltchenko 21256327eb98SAndrei Emeltchenko rfc.txwin_size = min_t(u16, chan->tx_win, 21266327eb98SAndrei Emeltchenko L2CAP_DEFAULT_TX_WINDOW); 21270a708f8fSGustavo F. Padovan 21280a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), 21290a708f8fSGustavo F. Padovan (unsigned long) &rfc); 21300a708f8fSGustavo F. Padovan 2131f89cef09SAndrei Emeltchenko if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) 2132f89cef09SAndrei Emeltchenko l2cap_add_opt_efs(&ptr, chan); 2133f89cef09SAndrei Emeltchenko 21348c1d787bSGustavo F. Padovan if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) 21350a708f8fSGustavo F. Padovan break; 21360a708f8fSGustavo F. Padovan 213747d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_NONE || 2138c1360a1cSGustavo F. Padovan test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { 213947d1ec61SGustavo F. Padovan chan->fcs = L2CAP_FCS_NONE; 214047d1ec61SGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); 21410a708f8fSGustavo F. Padovan } 21426327eb98SAndrei Emeltchenko 21436327eb98SAndrei Emeltchenko if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 21446327eb98SAndrei Emeltchenko l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, 21456327eb98SAndrei Emeltchenko chan->tx_win); 21460a708f8fSGustavo F. Padovan break; 21470a708f8fSGustavo F. Padovan 21480a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 21490a708f8fSGustavo F. Padovan rfc.mode = L2CAP_MODE_STREAMING; 21500a708f8fSGustavo F. Padovan rfc.txwin_size = 0; 21510a708f8fSGustavo F. Padovan rfc.max_transmit = 0; 21520a708f8fSGustavo F. Padovan rfc.retrans_timeout = 0; 21530a708f8fSGustavo F. Padovan rfc.monitor_timeout = 0; 2154c8f79162SAndrei Emeltchenko 2155c8f79162SAndrei Emeltchenko size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu - 2156c8f79162SAndrei Emeltchenko L2CAP_EXT_HDR_SIZE - 2157c8f79162SAndrei Emeltchenko L2CAP_SDULEN_SIZE - 2158c8f79162SAndrei Emeltchenko L2CAP_FCS_SIZE); 2159c8f79162SAndrei Emeltchenko rfc.max_pdu_size = cpu_to_le16(size); 21600a708f8fSGustavo F. Padovan 21610a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), 21620a708f8fSGustavo F. Padovan (unsigned long) &rfc); 21630a708f8fSGustavo F. Padovan 2164f89cef09SAndrei Emeltchenko if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) 2165f89cef09SAndrei Emeltchenko l2cap_add_opt_efs(&ptr, chan); 2166f89cef09SAndrei Emeltchenko 21678c1d787bSGustavo F. Padovan if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) 21680a708f8fSGustavo F. Padovan break; 21690a708f8fSGustavo F. Padovan 217047d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_NONE || 2171c1360a1cSGustavo F. Padovan test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { 217247d1ec61SGustavo F. Padovan chan->fcs = L2CAP_FCS_NONE; 217347d1ec61SGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); 21740a708f8fSGustavo F. Padovan } 21750a708f8fSGustavo F. Padovan break; 21760a708f8fSGustavo F. Padovan } 21770a708f8fSGustavo F. Padovan 2178fe4128e0SGustavo F. Padovan req->dcid = cpu_to_le16(chan->dcid); 21790a708f8fSGustavo F. Padovan req->flags = cpu_to_le16(0); 21800a708f8fSGustavo F. Padovan 21810a708f8fSGustavo F. Padovan return ptr - data; 21820a708f8fSGustavo F. Padovan } 21830a708f8fSGustavo F. Padovan 218473ffa904SGustavo F. Padovan static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data) 21850a708f8fSGustavo F. Padovan { 21860a708f8fSGustavo F. Padovan struct l2cap_conf_rsp *rsp = data; 21870a708f8fSGustavo F. Padovan void *ptr = rsp->data; 218873ffa904SGustavo F. Padovan void *req = chan->conf_req; 218973ffa904SGustavo F. Padovan int len = chan->conf_len; 21900a708f8fSGustavo F. Padovan int type, hint, olen; 21910a708f8fSGustavo F. Padovan unsigned long val; 21920a708f8fSGustavo F. Padovan struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; 219342dceae2SAndrei Emeltchenko struct l2cap_conf_efs efs; 219442dceae2SAndrei Emeltchenko u8 remote_efs = 0; 21950a708f8fSGustavo F. Padovan u16 mtu = L2CAP_DEFAULT_MTU; 21960a708f8fSGustavo F. Padovan u16 result = L2CAP_CONF_SUCCESS; 2197c8f79162SAndrei Emeltchenko u16 size; 21980a708f8fSGustavo F. Padovan 219973ffa904SGustavo F. Padovan BT_DBG("chan %p", chan); 22000a708f8fSGustavo F. Padovan 22010a708f8fSGustavo F. Padovan while (len >= L2CAP_CONF_OPT_SIZE) { 22020a708f8fSGustavo F. Padovan len -= l2cap_get_conf_opt(&req, &type, &olen, &val); 22030a708f8fSGustavo F. Padovan 22040a708f8fSGustavo F. Padovan hint = type & L2CAP_CONF_HINT; 22050a708f8fSGustavo F. Padovan type &= L2CAP_CONF_MASK; 22060a708f8fSGustavo F. Padovan 22070a708f8fSGustavo F. Padovan switch (type) { 22080a708f8fSGustavo F. Padovan case L2CAP_CONF_MTU: 22090a708f8fSGustavo F. Padovan mtu = val; 22100a708f8fSGustavo F. Padovan break; 22110a708f8fSGustavo F. Padovan 22120a708f8fSGustavo F. Padovan case L2CAP_CONF_FLUSH_TO: 22130c1bc5c6SGustavo F. Padovan chan->flush_to = val; 22140a708f8fSGustavo F. Padovan break; 22150a708f8fSGustavo F. Padovan 22160a708f8fSGustavo F. Padovan case L2CAP_CONF_QOS: 22170a708f8fSGustavo F. Padovan break; 22180a708f8fSGustavo F. Padovan 22190a708f8fSGustavo F. Padovan case L2CAP_CONF_RFC: 22200a708f8fSGustavo F. Padovan if (olen == sizeof(rfc)) 22210a708f8fSGustavo F. Padovan memcpy(&rfc, (void *) val, olen); 22220a708f8fSGustavo F. Padovan break; 22230a708f8fSGustavo F. Padovan 22240a708f8fSGustavo F. Padovan case L2CAP_CONF_FCS: 22250a708f8fSGustavo F. Padovan if (val == L2CAP_FCS_NONE) 2226c1360a1cSGustavo F. Padovan set_bit(CONF_NO_FCS_RECV, &chan->conf_state); 222742dceae2SAndrei Emeltchenko break; 22280a708f8fSGustavo F. Padovan 222942dceae2SAndrei Emeltchenko case L2CAP_CONF_EFS: 223042dceae2SAndrei Emeltchenko remote_efs = 1; 223142dceae2SAndrei Emeltchenko if (olen == sizeof(efs)) 223242dceae2SAndrei Emeltchenko memcpy(&efs, (void *) val, olen); 22330a708f8fSGustavo F. Padovan break; 22340a708f8fSGustavo F. Padovan 22356327eb98SAndrei Emeltchenko case L2CAP_CONF_EWS: 22366327eb98SAndrei Emeltchenko if (!enable_hs) 22376327eb98SAndrei Emeltchenko return -ECONNREFUSED; 22386327eb98SAndrei Emeltchenko 22396327eb98SAndrei Emeltchenko set_bit(FLAG_EXT_CTRL, &chan->flags); 22406327eb98SAndrei Emeltchenko set_bit(CONF_EWS_RECV, &chan->conf_state); 2241836be934SAndrei Emeltchenko chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW; 22426327eb98SAndrei Emeltchenko chan->remote_tx_win = val; 22430a708f8fSGustavo F. Padovan break; 22440a708f8fSGustavo F. Padovan 22450a708f8fSGustavo F. Padovan default: 22460a708f8fSGustavo F. Padovan if (hint) 22470a708f8fSGustavo F. Padovan break; 22480a708f8fSGustavo F. Padovan 22490a708f8fSGustavo F. Padovan result = L2CAP_CONF_UNKNOWN; 22500a708f8fSGustavo F. Padovan *((u8 *) ptr++) = type; 22510a708f8fSGustavo F. Padovan break; 22520a708f8fSGustavo F. Padovan } 22530a708f8fSGustavo F. Padovan } 22540a708f8fSGustavo F. Padovan 225573ffa904SGustavo F. Padovan if (chan->num_conf_rsp || chan->num_conf_req > 1) 22560a708f8fSGustavo F. Padovan goto done; 22570a708f8fSGustavo F. Padovan 22580c1bc5c6SGustavo F. Padovan switch (chan->mode) { 22590a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 22600a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 2261c1360a1cSGustavo F. Padovan if (!test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) { 22620c1bc5c6SGustavo F. Padovan chan->mode = l2cap_select_mode(rfc.mode, 22638c1d787bSGustavo F. Padovan chan->conn->feat_mask); 22640a708f8fSGustavo F. Padovan break; 22650a708f8fSGustavo F. Padovan } 22660a708f8fSGustavo F. Padovan 226742dceae2SAndrei Emeltchenko if (remote_efs) { 226842dceae2SAndrei Emeltchenko if (__l2cap_efs_supported(chan)) 226942dceae2SAndrei Emeltchenko set_bit(FLAG_EFS_ENABLE, &chan->flags); 227042dceae2SAndrei Emeltchenko else 227142dceae2SAndrei Emeltchenko return -ECONNREFUSED; 227242dceae2SAndrei Emeltchenko } 227342dceae2SAndrei Emeltchenko 22740c1bc5c6SGustavo F. Padovan if (chan->mode != rfc.mode) 22750a708f8fSGustavo F. Padovan return -ECONNREFUSED; 22760a708f8fSGustavo F. Padovan 22770a708f8fSGustavo F. Padovan break; 22780a708f8fSGustavo F. Padovan } 22790a708f8fSGustavo F. Padovan 22800a708f8fSGustavo F. Padovan done: 22810c1bc5c6SGustavo F. Padovan if (chan->mode != rfc.mode) { 22820a708f8fSGustavo F. Padovan result = L2CAP_CONF_UNACCEPT; 22830c1bc5c6SGustavo F. Padovan rfc.mode = chan->mode; 22840a708f8fSGustavo F. Padovan 228573ffa904SGustavo F. Padovan if (chan->num_conf_rsp == 1) 22860a708f8fSGustavo F. Padovan return -ECONNREFUSED; 22870a708f8fSGustavo F. Padovan 22880a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, 22890a708f8fSGustavo F. Padovan sizeof(rfc), (unsigned long) &rfc); 22900a708f8fSGustavo F. Padovan } 22910a708f8fSGustavo F. Padovan 22920a708f8fSGustavo F. Padovan if (result == L2CAP_CONF_SUCCESS) { 22930a708f8fSGustavo F. Padovan /* Configure output options and let the other side know 22940a708f8fSGustavo F. Padovan * which ones we don't like. */ 22950a708f8fSGustavo F. Padovan 22960a708f8fSGustavo F. Padovan if (mtu < L2CAP_DEFAULT_MIN_MTU) 22970a708f8fSGustavo F. Padovan result = L2CAP_CONF_UNACCEPT; 22980a708f8fSGustavo F. Padovan else { 22990c1bc5c6SGustavo F. Padovan chan->omtu = mtu; 2300c1360a1cSGustavo F. Padovan set_bit(CONF_MTU_DONE, &chan->conf_state); 23010a708f8fSGustavo F. Padovan } 23020c1bc5c6SGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu); 23030a708f8fSGustavo F. Padovan 230442dceae2SAndrei Emeltchenko if (remote_efs) { 230542dceae2SAndrei Emeltchenko if (chan->local_stype != L2CAP_SERV_NOTRAFIC && 230642dceae2SAndrei Emeltchenko efs.stype != L2CAP_SERV_NOTRAFIC && 230742dceae2SAndrei Emeltchenko efs.stype != chan->local_stype) { 230842dceae2SAndrei Emeltchenko 230942dceae2SAndrei Emeltchenko result = L2CAP_CONF_UNACCEPT; 231042dceae2SAndrei Emeltchenko 231142dceae2SAndrei Emeltchenko if (chan->num_conf_req >= 1) 231242dceae2SAndrei Emeltchenko return -ECONNREFUSED; 231342dceae2SAndrei Emeltchenko 231442dceae2SAndrei Emeltchenko l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, 231542dceae2SAndrei Emeltchenko sizeof(efs), 231642dceae2SAndrei Emeltchenko (unsigned long) &efs); 23170e8b207eSAndrei Emeltchenko } else { 23183e6b3b95SGustavo F. Padovan /* Send PENDING Conf Rsp */ 23190e8b207eSAndrei Emeltchenko result = L2CAP_CONF_PENDING; 23200e8b207eSAndrei Emeltchenko set_bit(CONF_LOC_CONF_PEND, &chan->conf_state); 232142dceae2SAndrei Emeltchenko } 232242dceae2SAndrei Emeltchenko } 232342dceae2SAndrei Emeltchenko 23240a708f8fSGustavo F. Padovan switch (rfc.mode) { 23250a708f8fSGustavo F. Padovan case L2CAP_MODE_BASIC: 232647d1ec61SGustavo F. Padovan chan->fcs = L2CAP_FCS_NONE; 2327c1360a1cSGustavo F. Padovan set_bit(CONF_MODE_DONE, &chan->conf_state); 23280a708f8fSGustavo F. Padovan break; 23290a708f8fSGustavo F. Padovan 23300a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 23316327eb98SAndrei Emeltchenko if (!test_bit(CONF_EWS_RECV, &chan->conf_state)) 23322c03a7a4SGustavo F. Padovan chan->remote_tx_win = rfc.txwin_size; 23336327eb98SAndrei Emeltchenko else 23346327eb98SAndrei Emeltchenko rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW; 23356327eb98SAndrei Emeltchenko 23362c03a7a4SGustavo F. Padovan chan->remote_max_tx = rfc.max_transmit; 23370a708f8fSGustavo F. Padovan 2338c8f79162SAndrei Emeltchenko size = min_t(u16, le16_to_cpu(rfc.max_pdu_size), 2339c8f79162SAndrei Emeltchenko chan->conn->mtu - 2340c8f79162SAndrei Emeltchenko L2CAP_EXT_HDR_SIZE - 2341c8f79162SAndrei Emeltchenko L2CAP_SDULEN_SIZE - 2342c8f79162SAndrei Emeltchenko L2CAP_FCS_SIZE); 2343c8f79162SAndrei Emeltchenko rfc.max_pdu_size = cpu_to_le16(size); 2344c8f79162SAndrei Emeltchenko chan->remote_mps = size; 23450a708f8fSGustavo F. Padovan 23460a708f8fSGustavo F. Padovan rfc.retrans_timeout = 23470a708f8fSGustavo F. Padovan le16_to_cpu(L2CAP_DEFAULT_RETRANS_TO); 23480a708f8fSGustavo F. Padovan rfc.monitor_timeout = 23490a708f8fSGustavo F. Padovan le16_to_cpu(L2CAP_DEFAULT_MONITOR_TO); 23500a708f8fSGustavo F. Padovan 2351c1360a1cSGustavo F. Padovan set_bit(CONF_MODE_DONE, &chan->conf_state); 23520a708f8fSGustavo F. Padovan 23530a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, 23540a708f8fSGustavo F. Padovan sizeof(rfc), (unsigned long) &rfc); 23550a708f8fSGustavo F. Padovan 235642dceae2SAndrei Emeltchenko if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) { 235742dceae2SAndrei Emeltchenko chan->remote_id = efs.id; 235842dceae2SAndrei Emeltchenko chan->remote_stype = efs.stype; 235942dceae2SAndrei Emeltchenko chan->remote_msdu = le16_to_cpu(efs.msdu); 236042dceae2SAndrei Emeltchenko chan->remote_flush_to = 236142dceae2SAndrei Emeltchenko le32_to_cpu(efs.flush_to); 236242dceae2SAndrei Emeltchenko chan->remote_acc_lat = 236342dceae2SAndrei Emeltchenko le32_to_cpu(efs.acc_lat); 236442dceae2SAndrei Emeltchenko chan->remote_sdu_itime = 236542dceae2SAndrei Emeltchenko le32_to_cpu(efs.sdu_itime); 236642dceae2SAndrei Emeltchenko l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, 236742dceae2SAndrei Emeltchenko sizeof(efs), (unsigned long) &efs); 236842dceae2SAndrei Emeltchenko } 23690a708f8fSGustavo F. Padovan break; 23700a708f8fSGustavo F. Padovan 23710a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 2372c8f79162SAndrei Emeltchenko size = min_t(u16, le16_to_cpu(rfc.max_pdu_size), 2373c8f79162SAndrei Emeltchenko chan->conn->mtu - 2374c8f79162SAndrei Emeltchenko L2CAP_EXT_HDR_SIZE - 2375c8f79162SAndrei Emeltchenko L2CAP_SDULEN_SIZE - 2376c8f79162SAndrei Emeltchenko L2CAP_FCS_SIZE); 2377c8f79162SAndrei Emeltchenko rfc.max_pdu_size = cpu_to_le16(size); 2378c8f79162SAndrei Emeltchenko chan->remote_mps = size; 23790a708f8fSGustavo F. Padovan 2380c1360a1cSGustavo F. Padovan set_bit(CONF_MODE_DONE, &chan->conf_state); 23810a708f8fSGustavo F. Padovan 23820a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, 23830a708f8fSGustavo F. Padovan sizeof(rfc), (unsigned long) &rfc); 23840a708f8fSGustavo F. Padovan 23850a708f8fSGustavo F. Padovan break; 23860a708f8fSGustavo F. Padovan 23870a708f8fSGustavo F. Padovan default: 23880a708f8fSGustavo F. Padovan result = L2CAP_CONF_UNACCEPT; 23890a708f8fSGustavo F. Padovan 23900a708f8fSGustavo F. Padovan memset(&rfc, 0, sizeof(rfc)); 23910c1bc5c6SGustavo F. Padovan rfc.mode = chan->mode; 23920a708f8fSGustavo F. Padovan } 23930a708f8fSGustavo F. Padovan 23940a708f8fSGustavo F. Padovan if (result == L2CAP_CONF_SUCCESS) 2395c1360a1cSGustavo F. Padovan set_bit(CONF_OUTPUT_DONE, &chan->conf_state); 23960a708f8fSGustavo F. Padovan } 2397fe4128e0SGustavo F. Padovan rsp->scid = cpu_to_le16(chan->dcid); 23980a708f8fSGustavo F. Padovan rsp->result = cpu_to_le16(result); 23990a708f8fSGustavo F. Padovan rsp->flags = cpu_to_le16(0x0000); 24000a708f8fSGustavo F. Padovan 24010a708f8fSGustavo F. Padovan return ptr - data; 24020a708f8fSGustavo F. Padovan } 24030a708f8fSGustavo F. Padovan 2404b4450035SGustavo F. Padovan static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len, void *data, u16 *result) 24050a708f8fSGustavo F. Padovan { 24060a708f8fSGustavo F. Padovan struct l2cap_conf_req *req = data; 24070a708f8fSGustavo F. Padovan void *ptr = req->data; 24080a708f8fSGustavo F. Padovan int type, olen; 24090a708f8fSGustavo F. Padovan unsigned long val; 241036e999a8SMat Martineau struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; 241166af7aafSAndrei Emeltchenko struct l2cap_conf_efs efs; 24120a708f8fSGustavo F. Padovan 2413fe4128e0SGustavo F. Padovan BT_DBG("chan %p, rsp %p, len %d, req %p", chan, rsp, len, data); 24140a708f8fSGustavo F. Padovan 24150a708f8fSGustavo F. Padovan while (len >= L2CAP_CONF_OPT_SIZE) { 24160a708f8fSGustavo F. Padovan len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); 24170a708f8fSGustavo F. Padovan 24180a708f8fSGustavo F. Padovan switch (type) { 24190a708f8fSGustavo F. Padovan case L2CAP_CONF_MTU: 24200a708f8fSGustavo F. Padovan if (val < L2CAP_DEFAULT_MIN_MTU) { 24210a708f8fSGustavo F. Padovan *result = L2CAP_CONF_UNACCEPT; 24220c1bc5c6SGustavo F. Padovan chan->imtu = L2CAP_DEFAULT_MIN_MTU; 24230a708f8fSGustavo F. Padovan } else 24240c1bc5c6SGustavo F. Padovan chan->imtu = val; 24250c1bc5c6SGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); 24260a708f8fSGustavo F. Padovan break; 24270a708f8fSGustavo F. Padovan 24280a708f8fSGustavo F. Padovan case L2CAP_CONF_FLUSH_TO: 24290c1bc5c6SGustavo F. Padovan chan->flush_to = val; 24300a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 24310c1bc5c6SGustavo F. Padovan 2, chan->flush_to); 24320a708f8fSGustavo F. Padovan break; 24330a708f8fSGustavo F. Padovan 24340a708f8fSGustavo F. Padovan case L2CAP_CONF_RFC: 24350a708f8fSGustavo F. Padovan if (olen == sizeof(rfc)) 24360a708f8fSGustavo F. Padovan memcpy(&rfc, (void *)val, olen); 24370a708f8fSGustavo F. Padovan 2438c1360a1cSGustavo F. Padovan if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) && 24390c1bc5c6SGustavo F. Padovan rfc.mode != chan->mode) 24400a708f8fSGustavo F. Padovan return -ECONNREFUSED; 24410a708f8fSGustavo F. Padovan 244247d1ec61SGustavo F. Padovan chan->fcs = 0; 24430a708f8fSGustavo F. Padovan 24440a708f8fSGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, 24450a708f8fSGustavo F. Padovan sizeof(rfc), (unsigned long) &rfc); 24460a708f8fSGustavo F. Padovan break; 24476327eb98SAndrei Emeltchenko 24486327eb98SAndrei Emeltchenko case L2CAP_CONF_EWS: 24496327eb98SAndrei Emeltchenko chan->tx_win = min_t(u16, val, 24506327eb98SAndrei Emeltchenko L2CAP_DEFAULT_EXT_WINDOW); 24513e6b3b95SGustavo F. Padovan l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, 24523e6b3b95SGustavo F. Padovan chan->tx_win); 24536327eb98SAndrei Emeltchenko break; 245466af7aafSAndrei Emeltchenko 245566af7aafSAndrei Emeltchenko case L2CAP_CONF_EFS: 245666af7aafSAndrei Emeltchenko if (olen == sizeof(efs)) 245766af7aafSAndrei Emeltchenko memcpy(&efs, (void *)val, olen); 245866af7aafSAndrei Emeltchenko 245966af7aafSAndrei Emeltchenko if (chan->local_stype != L2CAP_SERV_NOTRAFIC && 246066af7aafSAndrei Emeltchenko efs.stype != L2CAP_SERV_NOTRAFIC && 246166af7aafSAndrei Emeltchenko efs.stype != chan->local_stype) 246266af7aafSAndrei Emeltchenko return -ECONNREFUSED; 246366af7aafSAndrei Emeltchenko 246466af7aafSAndrei Emeltchenko l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, 246566af7aafSAndrei Emeltchenko sizeof(efs), (unsigned long) &efs); 246666af7aafSAndrei Emeltchenko break; 24670a708f8fSGustavo F. Padovan } 24680a708f8fSGustavo F. Padovan } 24690a708f8fSGustavo F. Padovan 24700c1bc5c6SGustavo F. Padovan if (chan->mode == L2CAP_MODE_BASIC && chan->mode != rfc.mode) 24710a708f8fSGustavo F. Padovan return -ECONNREFUSED; 24720a708f8fSGustavo F. Padovan 24730c1bc5c6SGustavo F. Padovan chan->mode = rfc.mode; 24740a708f8fSGustavo F. Padovan 24750e8b207eSAndrei Emeltchenko if (*result == L2CAP_CONF_SUCCESS || *result == L2CAP_CONF_PENDING) { 24760a708f8fSGustavo F. Padovan switch (rfc.mode) { 24770a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 247847d1ec61SGustavo F. Padovan chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); 247947d1ec61SGustavo F. Padovan chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); 248047d1ec61SGustavo F. Padovan chan->mps = le16_to_cpu(rfc.max_pdu_size); 248166af7aafSAndrei Emeltchenko 248266af7aafSAndrei Emeltchenko if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) { 248366af7aafSAndrei Emeltchenko chan->local_msdu = le16_to_cpu(efs.msdu); 248466af7aafSAndrei Emeltchenko chan->local_sdu_itime = 248566af7aafSAndrei Emeltchenko le32_to_cpu(efs.sdu_itime); 248666af7aafSAndrei Emeltchenko chan->local_acc_lat = le32_to_cpu(efs.acc_lat); 248766af7aafSAndrei Emeltchenko chan->local_flush_to = 248866af7aafSAndrei Emeltchenko le32_to_cpu(efs.flush_to); 248966af7aafSAndrei Emeltchenko } 24900a708f8fSGustavo F. Padovan break; 249166af7aafSAndrei Emeltchenko 24920a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 249347d1ec61SGustavo F. Padovan chan->mps = le16_to_cpu(rfc.max_pdu_size); 24940a708f8fSGustavo F. Padovan } 24950a708f8fSGustavo F. Padovan } 24960a708f8fSGustavo F. Padovan 2497fe4128e0SGustavo F. Padovan req->dcid = cpu_to_le16(chan->dcid); 24980a708f8fSGustavo F. Padovan req->flags = cpu_to_le16(0x0000); 24990a708f8fSGustavo F. Padovan 25000a708f8fSGustavo F. Padovan return ptr - data; 25010a708f8fSGustavo F. Padovan } 25020a708f8fSGustavo F. Padovan 2503fe4128e0SGustavo F. Padovan static int l2cap_build_conf_rsp(struct l2cap_chan *chan, void *data, u16 result, u16 flags) 25040a708f8fSGustavo F. Padovan { 25050a708f8fSGustavo F. Padovan struct l2cap_conf_rsp *rsp = data; 25060a708f8fSGustavo F. Padovan void *ptr = rsp->data; 25070a708f8fSGustavo F. Padovan 2508fe4128e0SGustavo F. Padovan BT_DBG("chan %p", chan); 25090a708f8fSGustavo F. Padovan 2510fe4128e0SGustavo F. Padovan rsp->scid = cpu_to_le16(chan->dcid); 25110a708f8fSGustavo F. Padovan rsp->result = cpu_to_le16(result); 25120a708f8fSGustavo F. Padovan rsp->flags = cpu_to_le16(flags); 25130a708f8fSGustavo F. Padovan 25140a708f8fSGustavo F. Padovan return ptr - data; 25150a708f8fSGustavo F. Padovan } 25160a708f8fSGustavo F. Padovan 25178c1d787bSGustavo F. Padovan void __l2cap_connect_rsp_defer(struct l2cap_chan *chan) 2518710f9b0aSGustavo F. Padovan { 2519710f9b0aSGustavo F. Padovan struct l2cap_conn_rsp rsp; 25208c1d787bSGustavo F. Padovan struct l2cap_conn *conn = chan->conn; 2521710f9b0aSGustavo F. Padovan u8 buf[128]; 2522710f9b0aSGustavo F. Padovan 2523fe4128e0SGustavo F. Padovan rsp.scid = cpu_to_le16(chan->dcid); 2524fe4128e0SGustavo F. Padovan rsp.dcid = cpu_to_le16(chan->scid); 2525710f9b0aSGustavo F. Padovan rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); 2526710f9b0aSGustavo F. Padovan rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); 2527710f9b0aSGustavo F. Padovan l2cap_send_cmd(conn, chan->ident, 2528710f9b0aSGustavo F. Padovan L2CAP_CONN_RSP, sizeof(rsp), &rsp); 2529710f9b0aSGustavo F. Padovan 2530c1360a1cSGustavo F. Padovan if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) 2531710f9b0aSGustavo F. Padovan return; 2532710f9b0aSGustavo F. Padovan 2533710f9b0aSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, 2534710f9b0aSGustavo F. Padovan l2cap_build_conf_req(chan, buf), buf); 2535710f9b0aSGustavo F. Padovan chan->num_conf_req++; 2536710f9b0aSGustavo F. Padovan } 2537710f9b0aSGustavo F. Padovan 253847d1ec61SGustavo F. Padovan static void l2cap_conf_rfc_get(struct l2cap_chan *chan, void *rsp, int len) 25390a708f8fSGustavo F. Padovan { 25400a708f8fSGustavo F. Padovan int type, olen; 25410a708f8fSGustavo F. Padovan unsigned long val; 25420a708f8fSGustavo F. Padovan struct l2cap_conf_rfc rfc; 25430a708f8fSGustavo F. Padovan 254447d1ec61SGustavo F. Padovan BT_DBG("chan %p, rsp %p, len %d", chan, rsp, len); 25450a708f8fSGustavo F. Padovan 25460c1bc5c6SGustavo F. Padovan if ((chan->mode != L2CAP_MODE_ERTM) && (chan->mode != L2CAP_MODE_STREAMING)) 25470a708f8fSGustavo F. Padovan return; 25480a708f8fSGustavo F. Padovan 25490a708f8fSGustavo F. Padovan while (len >= L2CAP_CONF_OPT_SIZE) { 25500a708f8fSGustavo F. Padovan len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); 25510a708f8fSGustavo F. Padovan 25520a708f8fSGustavo F. Padovan switch (type) { 25530a708f8fSGustavo F. Padovan case L2CAP_CONF_RFC: 25540a708f8fSGustavo F. Padovan if (olen == sizeof(rfc)) 25550a708f8fSGustavo F. Padovan memcpy(&rfc, (void *)val, olen); 25560a708f8fSGustavo F. Padovan goto done; 25570a708f8fSGustavo F. Padovan } 25580a708f8fSGustavo F. Padovan } 25590a708f8fSGustavo F. Padovan 256036e999a8SMat Martineau /* Use sane default values in case a misbehaving remote device 256136e999a8SMat Martineau * did not send an RFC option. 256236e999a8SMat Martineau */ 256336e999a8SMat Martineau rfc.mode = chan->mode; 256436e999a8SMat Martineau rfc.retrans_timeout = cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO); 256536e999a8SMat Martineau rfc.monitor_timeout = cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO); 256636e999a8SMat Martineau rfc.max_pdu_size = cpu_to_le16(chan->imtu); 256736e999a8SMat Martineau 256836e999a8SMat Martineau BT_ERR("Expected RFC option was not found, using defaults"); 256936e999a8SMat Martineau 25700a708f8fSGustavo F. Padovan done: 25710a708f8fSGustavo F. Padovan switch (rfc.mode) { 25720a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 257347d1ec61SGustavo F. Padovan chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); 257447d1ec61SGustavo F. Padovan chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); 257547d1ec61SGustavo F. Padovan chan->mps = le16_to_cpu(rfc.max_pdu_size); 25760a708f8fSGustavo F. Padovan break; 25770a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 257847d1ec61SGustavo F. Padovan chan->mps = le16_to_cpu(rfc.max_pdu_size); 25790a708f8fSGustavo F. Padovan } 25800a708f8fSGustavo F. Padovan } 25810a708f8fSGustavo F. Padovan 25820a708f8fSGustavo F. Padovan static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) 25830a708f8fSGustavo F. Padovan { 2584e2fd318eSIlia Kolomisnky struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data; 25850a708f8fSGustavo F. Padovan 2586e2fd318eSIlia Kolomisnky if (rej->reason != L2CAP_REJ_NOT_UNDERSTOOD) 25870a708f8fSGustavo F. Padovan return 0; 25880a708f8fSGustavo F. Padovan 25890a708f8fSGustavo F. Padovan if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && 25900a708f8fSGustavo F. Padovan cmd->ident == conn->info_ident) { 259117cd3f37SUlisses Furquim cancel_delayed_work(&conn->info_timer); 25920a708f8fSGustavo F. Padovan 25930a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; 25940a708f8fSGustavo F. Padovan conn->info_ident = 0; 25950a708f8fSGustavo F. Padovan 25960a708f8fSGustavo F. Padovan l2cap_conn_start(conn); 25970a708f8fSGustavo F. Padovan } 25980a708f8fSGustavo F. Padovan 25990a708f8fSGustavo F. Padovan return 0; 26000a708f8fSGustavo F. Padovan } 26010a708f8fSGustavo F. Padovan 26020a708f8fSGustavo F. Padovan static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) 26030a708f8fSGustavo F. Padovan { 26040a708f8fSGustavo F. Padovan struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; 26050a708f8fSGustavo F. Padovan struct l2cap_conn_rsp rsp; 260623691d75SGustavo F. Padovan struct l2cap_chan *chan = NULL, *pchan; 26070a708f8fSGustavo F. Padovan struct sock *parent, *sk = NULL; 26080a708f8fSGustavo F. Padovan int result, status = L2CAP_CS_NO_INFO; 26090a708f8fSGustavo F. Padovan 26100a708f8fSGustavo F. Padovan u16 dcid = 0, scid = __le16_to_cpu(req->scid); 26110a708f8fSGustavo F. Padovan __le16 psm = req->psm; 26120a708f8fSGustavo F. Padovan 26130a708f8fSGustavo F. Padovan BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); 26140a708f8fSGustavo F. Padovan 26150a708f8fSGustavo F. Padovan /* Check if we have socket listening on psm */ 261623691d75SGustavo F. Padovan pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, conn->src); 261723691d75SGustavo F. Padovan if (!pchan) { 26180a708f8fSGustavo F. Padovan result = L2CAP_CR_BAD_PSM; 26190a708f8fSGustavo F. Padovan goto sendresp; 26200a708f8fSGustavo F. Padovan } 26210a708f8fSGustavo F. Padovan 262223691d75SGustavo F. Padovan parent = pchan->sk; 262323691d75SGustavo F. Padovan 2624aa2ac881SGustavo F. Padovan lock_sock(parent); 26250a708f8fSGustavo F. Padovan 26260a708f8fSGustavo F. Padovan /* Check if the ACL is secure enough (if not SDP) */ 26270a708f8fSGustavo F. Padovan if (psm != cpu_to_le16(0x0001) && 26280a708f8fSGustavo F. Padovan !hci_conn_check_link_mode(conn->hcon)) { 26299f5a0d7bSAndrei Emeltchenko conn->disc_reason = HCI_ERROR_AUTH_FAILURE; 26300a708f8fSGustavo F. Padovan result = L2CAP_CR_SEC_BLOCK; 26310a708f8fSGustavo F. Padovan goto response; 26320a708f8fSGustavo F. Padovan } 26330a708f8fSGustavo F. Padovan 26340a708f8fSGustavo F. Padovan result = L2CAP_CR_NO_MEM; 26350a708f8fSGustavo F. Padovan 26360a708f8fSGustavo F. Padovan /* Check for backlog size */ 26370a708f8fSGustavo F. Padovan if (sk_acceptq_is_full(parent)) { 26380a708f8fSGustavo F. Padovan BT_DBG("backlog full %d", parent->sk_ack_backlog); 26390a708f8fSGustavo F. Padovan goto response; 26400a708f8fSGustavo F. Padovan } 26410a708f8fSGustavo F. Padovan 264280808e43SGustavo F. Padovan chan = pchan->ops->new_connection(pchan->data); 264380808e43SGustavo F. Padovan if (!chan) 26440a708f8fSGustavo F. Padovan goto response; 26450a708f8fSGustavo F. Padovan 264680808e43SGustavo F. Padovan sk = chan->sk; 264780808e43SGustavo F. Padovan 26480a708f8fSGustavo F. Padovan /* Check if we already have channel with that dcid */ 2649baa7e1faSGustavo F. Padovan if (__l2cap_get_chan_by_dcid(conn, scid)) { 26500a708f8fSGustavo F. Padovan sock_set_flag(sk, SOCK_ZAPPED); 2651ba3bd0eeSGustavo F. Padovan chan->ops->close(chan->data); 26520a708f8fSGustavo F. Padovan goto response; 26530a708f8fSGustavo F. Padovan } 26540a708f8fSGustavo F. Padovan 26550a708f8fSGustavo F. Padovan hci_conn_hold(conn->hcon); 26560a708f8fSGustavo F. Padovan 26570a708f8fSGustavo F. Padovan bacpy(&bt_sk(sk)->src, conn->src); 26580a708f8fSGustavo F. Padovan bacpy(&bt_sk(sk)->dst, conn->dst); 2659fe4128e0SGustavo F. Padovan chan->psm = psm; 2660fe4128e0SGustavo F. Padovan chan->dcid = scid; 26610a708f8fSGustavo F. Padovan 2662d1010240SGustavo F. Padovan bt_accept_enqueue(parent, sk); 2663d1010240SGustavo F. Padovan 26643d57dc68SGustavo F. Padovan l2cap_chan_add(conn, chan); 266548454079SGustavo F. Padovan 2666fe4128e0SGustavo F. Padovan dcid = chan->scid; 26670a708f8fSGustavo F. Padovan 2668c9b66675SGustavo F. Padovan __set_chan_timer(chan, sk->sk_sndtimeo); 26690a708f8fSGustavo F. Padovan 2670fc7f8a7eSGustavo F. Padovan chan->ident = cmd->ident; 26710a708f8fSGustavo F. Padovan 26720a708f8fSGustavo F. Padovan if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { 2673d45fc423SGustavo F. Padovan if (l2cap_chan_check_security(chan)) { 26740a708f8fSGustavo F. Padovan if (bt_sk(sk)->defer_setup) { 267589bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONNECT2); 26760a708f8fSGustavo F. Padovan result = L2CAP_CR_PEND; 26770a708f8fSGustavo F. Padovan status = L2CAP_CS_AUTHOR_PEND; 26780a708f8fSGustavo F. Padovan parent->sk_data_ready(parent, 0); 26790a708f8fSGustavo F. Padovan } else { 268089bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONFIG); 26810a708f8fSGustavo F. Padovan result = L2CAP_CR_SUCCESS; 26820a708f8fSGustavo F. Padovan status = L2CAP_CS_NO_INFO; 26830a708f8fSGustavo F. Padovan } 26840a708f8fSGustavo F. Padovan } else { 268589bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONNECT2); 26860a708f8fSGustavo F. Padovan result = L2CAP_CR_PEND; 26870a708f8fSGustavo F. Padovan status = L2CAP_CS_AUTHEN_PEND; 26880a708f8fSGustavo F. Padovan } 26890a708f8fSGustavo F. Padovan } else { 269089bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONNECT2); 26910a708f8fSGustavo F. Padovan result = L2CAP_CR_PEND; 26920a708f8fSGustavo F. Padovan status = L2CAP_CS_NO_INFO; 26930a708f8fSGustavo F. Padovan } 26940a708f8fSGustavo F. Padovan 26950a708f8fSGustavo F. Padovan response: 2696aa2ac881SGustavo F. Padovan release_sock(parent); 26970a708f8fSGustavo F. Padovan 26980a708f8fSGustavo F. Padovan sendresp: 26990a708f8fSGustavo F. Padovan rsp.scid = cpu_to_le16(scid); 27000a708f8fSGustavo F. Padovan rsp.dcid = cpu_to_le16(dcid); 27010a708f8fSGustavo F. Padovan rsp.result = cpu_to_le16(result); 27020a708f8fSGustavo F. Padovan rsp.status = cpu_to_le16(status); 27030a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); 27040a708f8fSGustavo F. Padovan 27050a708f8fSGustavo F. Padovan if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { 27060a708f8fSGustavo F. Padovan struct l2cap_info_req info; 27070a708f8fSGustavo F. Padovan info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); 27080a708f8fSGustavo F. Padovan 27090a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; 27100a708f8fSGustavo F. Padovan conn->info_ident = l2cap_get_ident(conn); 27110a708f8fSGustavo F. Padovan 2712030013d8SGustavo F. Padovan schedule_delayed_work(&conn->info_timer, 27130a708f8fSGustavo F. Padovan msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); 27140a708f8fSGustavo F. Padovan 27150a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, conn->info_ident, 27160a708f8fSGustavo F. Padovan L2CAP_INFO_REQ, sizeof(info), &info); 27170a708f8fSGustavo F. Padovan } 27180a708f8fSGustavo F. Padovan 2719c1360a1cSGustavo F. Padovan if (chan && !test_bit(CONF_REQ_SENT, &chan->conf_state) && 27200a708f8fSGustavo F. Padovan result == L2CAP_CR_SUCCESS) { 27210a708f8fSGustavo F. Padovan u8 buf[128]; 2722c1360a1cSGustavo F. Padovan set_bit(CONF_REQ_SENT, &chan->conf_state); 27230a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, 272473ffa904SGustavo F. Padovan l2cap_build_conf_req(chan, buf), buf); 272573ffa904SGustavo F. Padovan chan->num_conf_req++; 27260a708f8fSGustavo F. Padovan } 27270a708f8fSGustavo F. Padovan 27280a708f8fSGustavo F. Padovan return 0; 27290a708f8fSGustavo F. Padovan } 27300a708f8fSGustavo F. Padovan 27310a708f8fSGustavo F. Padovan static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) 27320a708f8fSGustavo F. Padovan { 27330a708f8fSGustavo F. Padovan struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; 27340a708f8fSGustavo F. Padovan u16 scid, dcid, result, status; 273548454079SGustavo F. Padovan struct l2cap_chan *chan; 27360a708f8fSGustavo F. Padovan struct sock *sk; 27370a708f8fSGustavo F. Padovan u8 req[128]; 27380a708f8fSGustavo F. Padovan 27390a708f8fSGustavo F. Padovan scid = __le16_to_cpu(rsp->scid); 27400a708f8fSGustavo F. Padovan dcid = __le16_to_cpu(rsp->dcid); 27410a708f8fSGustavo F. Padovan result = __le16_to_cpu(rsp->result); 27420a708f8fSGustavo F. Padovan status = __le16_to_cpu(rsp->status); 27430a708f8fSGustavo F. Padovan 27440a708f8fSGustavo F. Padovan BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); 27450a708f8fSGustavo F. Padovan 27460a708f8fSGustavo F. Padovan if (scid) { 2747baa7e1faSGustavo F. Padovan chan = l2cap_get_chan_by_scid(conn, scid); 274848454079SGustavo F. Padovan if (!chan) 27490a708f8fSGustavo F. Padovan return -EFAULT; 27500a708f8fSGustavo F. Padovan } else { 2751baa7e1faSGustavo F. Padovan chan = l2cap_get_chan_by_ident(conn, cmd->ident); 275248454079SGustavo F. Padovan if (!chan) 27530a708f8fSGustavo F. Padovan return -EFAULT; 27540a708f8fSGustavo F. Padovan } 27550a708f8fSGustavo F. Padovan 275648454079SGustavo F. Padovan sk = chan->sk; 275748454079SGustavo F. Padovan 27580a708f8fSGustavo F. Padovan switch (result) { 27590a708f8fSGustavo F. Padovan case L2CAP_CR_SUCCESS: 276089bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONFIG); 2761fc7f8a7eSGustavo F. Padovan chan->ident = 0; 2762fe4128e0SGustavo F. Padovan chan->dcid = dcid; 2763c1360a1cSGustavo F. Padovan clear_bit(CONF_CONNECT_PEND, &chan->conf_state); 27640a708f8fSGustavo F. Padovan 2765c1360a1cSGustavo F. Padovan if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) 27660a708f8fSGustavo F. Padovan break; 27670a708f8fSGustavo F. Padovan 27680a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, 276973ffa904SGustavo F. Padovan l2cap_build_conf_req(chan, req), req); 277073ffa904SGustavo F. Padovan chan->num_conf_req++; 27710a708f8fSGustavo F. Padovan break; 27720a708f8fSGustavo F. Padovan 27730a708f8fSGustavo F. Padovan case L2CAP_CR_PEND: 2774c1360a1cSGustavo F. Padovan set_bit(CONF_CONNECT_PEND, &chan->conf_state); 27750a708f8fSGustavo F. Padovan break; 27760a708f8fSGustavo F. Padovan 27770a708f8fSGustavo F. Padovan default: 277848454079SGustavo F. Padovan l2cap_chan_del(chan, ECONNREFUSED); 27790a708f8fSGustavo F. Padovan break; 27800a708f8fSGustavo F. Padovan } 27810a708f8fSGustavo F. Padovan 2782aa2ac881SGustavo F. Padovan release_sock(sk); 27830a708f8fSGustavo F. Padovan return 0; 27840a708f8fSGustavo F. Padovan } 27850a708f8fSGustavo F. Padovan 278647d1ec61SGustavo F. Padovan static inline void set_default_fcs(struct l2cap_chan *chan) 27870a708f8fSGustavo F. Padovan { 27880a708f8fSGustavo F. Padovan /* FCS is enabled only in ERTM or streaming mode, if one or both 27890a708f8fSGustavo F. Padovan * sides request it. 27900a708f8fSGustavo F. Padovan */ 27910c1bc5c6SGustavo F. Padovan if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING) 279247d1ec61SGustavo F. Padovan chan->fcs = L2CAP_FCS_NONE; 2793c1360a1cSGustavo F. Padovan else if (!test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) 279447d1ec61SGustavo F. Padovan chan->fcs = L2CAP_FCS_CRC16; 27950a708f8fSGustavo F. Padovan } 27960a708f8fSGustavo F. Padovan 27970a708f8fSGustavo F. Padovan static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) 27980a708f8fSGustavo F. Padovan { 27990a708f8fSGustavo F. Padovan struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; 28000a708f8fSGustavo F. Padovan u16 dcid, flags; 28010a708f8fSGustavo F. Padovan u8 rsp[64]; 280248454079SGustavo F. Padovan struct l2cap_chan *chan; 28030a708f8fSGustavo F. Padovan struct sock *sk; 28040a708f8fSGustavo F. Padovan int len; 28050a708f8fSGustavo F. Padovan 28060a708f8fSGustavo F. Padovan dcid = __le16_to_cpu(req->dcid); 28070a708f8fSGustavo F. Padovan flags = __le16_to_cpu(req->flags); 28080a708f8fSGustavo F. Padovan 28090a708f8fSGustavo F. Padovan BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); 28100a708f8fSGustavo F. Padovan 2811baa7e1faSGustavo F. Padovan chan = l2cap_get_chan_by_scid(conn, dcid); 281248454079SGustavo F. Padovan if (!chan) 28130a708f8fSGustavo F. Padovan return -ENOENT; 28140a708f8fSGustavo F. Padovan 281548454079SGustavo F. Padovan sk = chan->sk; 281648454079SGustavo F. Padovan 2817033b1142SDavid S. Miller if (chan->state != BT_CONFIG && chan->state != BT_CONNECT2) { 2818e2fd318eSIlia Kolomisnky struct l2cap_cmd_rej_cid rej; 28190a708f8fSGustavo F. Padovan 2820e2fd318eSIlia Kolomisnky rej.reason = cpu_to_le16(L2CAP_REJ_INVALID_CID); 2821e2fd318eSIlia Kolomisnky rej.scid = cpu_to_le16(chan->scid); 2822e2fd318eSIlia Kolomisnky rej.dcid = cpu_to_le16(chan->dcid); 2823e2fd318eSIlia Kolomisnky 28240a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ, 28250a708f8fSGustavo F. Padovan sizeof(rej), &rej); 28260a708f8fSGustavo F. Padovan goto unlock; 28270a708f8fSGustavo F. Padovan } 28280a708f8fSGustavo F. Padovan 28290a708f8fSGustavo F. Padovan /* Reject if config buffer is too small. */ 28300a708f8fSGustavo F. Padovan len = cmd_len - sizeof(*req); 28317ac28817SDan Rosenberg if (len < 0 || chan->conf_len + len > sizeof(chan->conf_req)) { 28320a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, 2833fe4128e0SGustavo F. Padovan l2cap_build_conf_rsp(chan, rsp, 28340a708f8fSGustavo F. Padovan L2CAP_CONF_REJECT, flags), rsp); 28350a708f8fSGustavo F. Padovan goto unlock; 28360a708f8fSGustavo F. Padovan } 28370a708f8fSGustavo F. Padovan 28380a708f8fSGustavo F. Padovan /* Store config. */ 283973ffa904SGustavo F. Padovan memcpy(chan->conf_req + chan->conf_len, req->data, len); 284073ffa904SGustavo F. Padovan chan->conf_len += len; 28410a708f8fSGustavo F. Padovan 28420a708f8fSGustavo F. Padovan if (flags & 0x0001) { 28430a708f8fSGustavo F. Padovan /* Incomplete config. Send empty response. */ 28440a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, 2845fe4128e0SGustavo F. Padovan l2cap_build_conf_rsp(chan, rsp, 28460a708f8fSGustavo F. Padovan L2CAP_CONF_SUCCESS, 0x0001), rsp); 28470a708f8fSGustavo F. Padovan goto unlock; 28480a708f8fSGustavo F. Padovan } 28490a708f8fSGustavo F. Padovan 28500a708f8fSGustavo F. Padovan /* Complete config. */ 285173ffa904SGustavo F. Padovan len = l2cap_parse_conf_req(chan, rsp); 28520a708f8fSGustavo F. Padovan if (len < 0) { 2853e92c8e70SGustavo F. Padovan l2cap_send_disconn_req(conn, chan, ECONNRESET); 28540a708f8fSGustavo F. Padovan goto unlock; 28550a708f8fSGustavo F. Padovan } 28560a708f8fSGustavo F. Padovan 28570a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); 285873ffa904SGustavo F. Padovan chan->num_conf_rsp++; 28590a708f8fSGustavo F. Padovan 28600a708f8fSGustavo F. Padovan /* Reset config buffer. */ 286173ffa904SGustavo F. Padovan chan->conf_len = 0; 28620a708f8fSGustavo F. Padovan 2863c1360a1cSGustavo F. Padovan if (!test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) 28640a708f8fSGustavo F. Padovan goto unlock; 28650a708f8fSGustavo F. Padovan 2866c1360a1cSGustavo F. Padovan if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) { 286747d1ec61SGustavo F. Padovan set_default_fcs(chan); 28680a708f8fSGustavo F. Padovan 286989bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONNECTED); 28700a708f8fSGustavo F. Padovan 287142e5c802SGustavo F. Padovan chan->next_tx_seq = 0; 287242e5c802SGustavo F. Padovan chan->expected_tx_seq = 0; 287358d35f87SGustavo F. Padovan skb_queue_head_init(&chan->tx_q); 28740c1bc5c6SGustavo F. Padovan if (chan->mode == L2CAP_MODE_ERTM) 2875525cd185SGustavo F. Padovan l2cap_ertm_init(chan); 28760a708f8fSGustavo F. Padovan 28770a708f8fSGustavo F. Padovan l2cap_chan_ready(sk); 28780a708f8fSGustavo F. Padovan goto unlock; 28790a708f8fSGustavo F. Padovan } 28800a708f8fSGustavo F. Padovan 2881c1360a1cSGustavo F. Padovan if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) { 28820a708f8fSGustavo F. Padovan u8 buf[64]; 28830a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, 288473ffa904SGustavo F. Padovan l2cap_build_conf_req(chan, buf), buf); 288573ffa904SGustavo F. Padovan chan->num_conf_req++; 28860a708f8fSGustavo F. Padovan } 28870a708f8fSGustavo F. Padovan 28880e8b207eSAndrei Emeltchenko /* Got Conf Rsp PENDING from remote side and asume we sent 28890e8b207eSAndrei Emeltchenko Conf Rsp PENDING in the code above */ 28900e8b207eSAndrei Emeltchenko if (test_bit(CONF_REM_CONF_PEND, &chan->conf_state) && 28910e8b207eSAndrei Emeltchenko test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) { 28920e8b207eSAndrei Emeltchenko 28930e8b207eSAndrei Emeltchenko /* check compatibility */ 28940e8b207eSAndrei Emeltchenko 28950e8b207eSAndrei Emeltchenko clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state); 28960e8b207eSAndrei Emeltchenko set_bit(CONF_OUTPUT_DONE, &chan->conf_state); 28970e8b207eSAndrei Emeltchenko 28980e8b207eSAndrei Emeltchenko l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, 28990e8b207eSAndrei Emeltchenko l2cap_build_conf_rsp(chan, rsp, 29000e8b207eSAndrei Emeltchenko L2CAP_CONF_SUCCESS, 0x0000), rsp); 29010e8b207eSAndrei Emeltchenko } 29020e8b207eSAndrei Emeltchenko 29030a708f8fSGustavo F. Padovan unlock: 2904aa2ac881SGustavo F. Padovan release_sock(sk); 29050a708f8fSGustavo F. Padovan return 0; 29060a708f8fSGustavo F. Padovan } 29070a708f8fSGustavo F. Padovan 29080a708f8fSGustavo F. Padovan static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) 29090a708f8fSGustavo F. Padovan { 29100a708f8fSGustavo F. Padovan struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; 29110a708f8fSGustavo F. Padovan u16 scid, flags, result; 291248454079SGustavo F. Padovan struct l2cap_chan *chan; 29130a708f8fSGustavo F. Padovan struct sock *sk; 29140a708f8fSGustavo F. Padovan int len = cmd->len - sizeof(*rsp); 29150a708f8fSGustavo F. Padovan 29160a708f8fSGustavo F. Padovan scid = __le16_to_cpu(rsp->scid); 29170a708f8fSGustavo F. Padovan flags = __le16_to_cpu(rsp->flags); 29180a708f8fSGustavo F. Padovan result = __le16_to_cpu(rsp->result); 29190a708f8fSGustavo F. Padovan 29200a708f8fSGustavo F. Padovan BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", 29210a708f8fSGustavo F. Padovan scid, flags, result); 29220a708f8fSGustavo F. Padovan 2923baa7e1faSGustavo F. Padovan chan = l2cap_get_chan_by_scid(conn, scid); 292448454079SGustavo F. Padovan if (!chan) 29250a708f8fSGustavo F. Padovan return 0; 29260a708f8fSGustavo F. Padovan 292748454079SGustavo F. Padovan sk = chan->sk; 292848454079SGustavo F. Padovan 29290a708f8fSGustavo F. Padovan switch (result) { 29300a708f8fSGustavo F. Padovan case L2CAP_CONF_SUCCESS: 293147d1ec61SGustavo F. Padovan l2cap_conf_rfc_get(chan, rsp->data, len); 29320e8b207eSAndrei Emeltchenko clear_bit(CONF_REM_CONF_PEND, &chan->conf_state); 29330a708f8fSGustavo F. Padovan break; 29340a708f8fSGustavo F. Padovan 29350e8b207eSAndrei Emeltchenko case L2CAP_CONF_PENDING: 29360e8b207eSAndrei Emeltchenko set_bit(CONF_REM_CONF_PEND, &chan->conf_state); 29370e8b207eSAndrei Emeltchenko 29380e8b207eSAndrei Emeltchenko if (test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) { 29390e8b207eSAndrei Emeltchenko char buf[64]; 29400e8b207eSAndrei Emeltchenko 29410e8b207eSAndrei Emeltchenko len = l2cap_parse_conf_rsp(chan, rsp->data, len, 29420e8b207eSAndrei Emeltchenko buf, &result); 29430e8b207eSAndrei Emeltchenko if (len < 0) { 29440e8b207eSAndrei Emeltchenko l2cap_send_disconn_req(conn, chan, ECONNRESET); 29450e8b207eSAndrei Emeltchenko goto done; 29460e8b207eSAndrei Emeltchenko } 29470e8b207eSAndrei Emeltchenko 29480e8b207eSAndrei Emeltchenko /* check compatibility */ 29490e8b207eSAndrei Emeltchenko 29500e8b207eSAndrei Emeltchenko clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state); 29510e8b207eSAndrei Emeltchenko set_bit(CONF_OUTPUT_DONE, &chan->conf_state); 29520e8b207eSAndrei Emeltchenko 29530e8b207eSAndrei Emeltchenko l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, 29540e8b207eSAndrei Emeltchenko l2cap_build_conf_rsp(chan, buf, 29550e8b207eSAndrei Emeltchenko L2CAP_CONF_SUCCESS, 0x0000), buf); 29560e8b207eSAndrei Emeltchenko } 29570e8b207eSAndrei Emeltchenko goto done; 29580e8b207eSAndrei Emeltchenko 29590a708f8fSGustavo F. Padovan case L2CAP_CONF_UNACCEPT: 296073ffa904SGustavo F. Padovan if (chan->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { 29610a708f8fSGustavo F. Padovan char req[64]; 29620a708f8fSGustavo F. Padovan 29630a708f8fSGustavo F. Padovan if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { 2964e92c8e70SGustavo F. Padovan l2cap_send_disconn_req(conn, chan, ECONNRESET); 29650a708f8fSGustavo F. Padovan goto done; 29660a708f8fSGustavo F. Padovan } 29670a708f8fSGustavo F. Padovan 29680a708f8fSGustavo F. Padovan /* throw out any old stored conf requests */ 29690a708f8fSGustavo F. Padovan result = L2CAP_CONF_SUCCESS; 2970b4450035SGustavo F. Padovan len = l2cap_parse_conf_rsp(chan, rsp->data, len, 2971b4450035SGustavo F. Padovan req, &result); 29720a708f8fSGustavo F. Padovan if (len < 0) { 2973e92c8e70SGustavo F. Padovan l2cap_send_disconn_req(conn, chan, ECONNRESET); 29740a708f8fSGustavo F. Padovan goto done; 29750a708f8fSGustavo F. Padovan } 29760a708f8fSGustavo F. Padovan 29770a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, l2cap_get_ident(conn), 29780a708f8fSGustavo F. Padovan L2CAP_CONF_REQ, len, req); 297973ffa904SGustavo F. Padovan chan->num_conf_req++; 29800a708f8fSGustavo F. Padovan if (result != L2CAP_CONF_SUCCESS) 29810a708f8fSGustavo F. Padovan goto done; 29820a708f8fSGustavo F. Padovan break; 29830a708f8fSGustavo F. Padovan } 29840a708f8fSGustavo F. Padovan 29850a708f8fSGustavo F. Padovan default: 29860a708f8fSGustavo F. Padovan sk->sk_err = ECONNRESET; 2987b83ddfe2SAndrzej Kaczmarek __set_chan_timer(chan, 2988b83ddfe2SAndrzej Kaczmarek msecs_to_jiffies(L2CAP_DISC_REJ_TIMEOUT)); 2989e92c8e70SGustavo F. Padovan l2cap_send_disconn_req(conn, chan, ECONNRESET); 29900a708f8fSGustavo F. Padovan goto done; 29910a708f8fSGustavo F. Padovan } 29920a708f8fSGustavo F. Padovan 29930a708f8fSGustavo F. Padovan if (flags & 0x01) 29940a708f8fSGustavo F. Padovan goto done; 29950a708f8fSGustavo F. Padovan 2996c1360a1cSGustavo F. Padovan set_bit(CONF_INPUT_DONE, &chan->conf_state); 29970a708f8fSGustavo F. Padovan 2998c1360a1cSGustavo F. Padovan if (test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) { 299947d1ec61SGustavo F. Padovan set_default_fcs(chan); 30000a708f8fSGustavo F. Padovan 300189bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONNECTED); 300242e5c802SGustavo F. Padovan chan->next_tx_seq = 0; 300342e5c802SGustavo F. Padovan chan->expected_tx_seq = 0; 300458d35f87SGustavo F. Padovan skb_queue_head_init(&chan->tx_q); 30050c1bc5c6SGustavo F. Padovan if (chan->mode == L2CAP_MODE_ERTM) 3006525cd185SGustavo F. Padovan l2cap_ertm_init(chan); 30070a708f8fSGustavo F. Padovan 30080a708f8fSGustavo F. Padovan l2cap_chan_ready(sk); 30090a708f8fSGustavo F. Padovan } 30100a708f8fSGustavo F. Padovan 30110a708f8fSGustavo F. Padovan done: 3012aa2ac881SGustavo F. Padovan release_sock(sk); 30130a708f8fSGustavo F. Padovan return 0; 30140a708f8fSGustavo F. Padovan } 30150a708f8fSGustavo F. Padovan 30160a708f8fSGustavo F. Padovan static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) 30170a708f8fSGustavo F. Padovan { 30180a708f8fSGustavo F. Padovan struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; 30190a708f8fSGustavo F. Padovan struct l2cap_disconn_rsp rsp; 30200a708f8fSGustavo F. Padovan u16 dcid, scid; 302148454079SGustavo F. Padovan struct l2cap_chan *chan; 30220a708f8fSGustavo F. Padovan struct sock *sk; 30230a708f8fSGustavo F. Padovan 30240a708f8fSGustavo F. Padovan scid = __le16_to_cpu(req->scid); 30250a708f8fSGustavo F. Padovan dcid = __le16_to_cpu(req->dcid); 30260a708f8fSGustavo F. Padovan 30270a708f8fSGustavo F. Padovan BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); 30280a708f8fSGustavo F. Padovan 3029baa7e1faSGustavo F. Padovan chan = l2cap_get_chan_by_scid(conn, dcid); 303048454079SGustavo F. Padovan if (!chan) 30310a708f8fSGustavo F. Padovan return 0; 30320a708f8fSGustavo F. Padovan 303348454079SGustavo F. Padovan sk = chan->sk; 303448454079SGustavo F. Padovan 3035fe4128e0SGustavo F. Padovan rsp.dcid = cpu_to_le16(chan->scid); 3036fe4128e0SGustavo F. Padovan rsp.scid = cpu_to_le16(chan->dcid); 30370a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); 30380a708f8fSGustavo F. Padovan 30390a708f8fSGustavo F. Padovan sk->sk_shutdown = SHUTDOWN_MASK; 30400a708f8fSGustavo F. Padovan 304148454079SGustavo F. Padovan l2cap_chan_del(chan, ECONNRESET); 3042aa2ac881SGustavo F. Padovan release_sock(sk); 30430a708f8fSGustavo F. Padovan 3044ba3bd0eeSGustavo F. Padovan chan->ops->close(chan->data); 30450a708f8fSGustavo F. Padovan return 0; 30460a708f8fSGustavo F. Padovan } 30470a708f8fSGustavo F. Padovan 30480a708f8fSGustavo F. Padovan static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) 30490a708f8fSGustavo F. Padovan { 30500a708f8fSGustavo F. Padovan struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; 30510a708f8fSGustavo F. Padovan u16 dcid, scid; 305248454079SGustavo F. Padovan struct l2cap_chan *chan; 30530a708f8fSGustavo F. Padovan struct sock *sk; 30540a708f8fSGustavo F. Padovan 30550a708f8fSGustavo F. Padovan scid = __le16_to_cpu(rsp->scid); 30560a708f8fSGustavo F. Padovan dcid = __le16_to_cpu(rsp->dcid); 30570a708f8fSGustavo F. Padovan 30580a708f8fSGustavo F. Padovan BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); 30590a708f8fSGustavo F. Padovan 3060baa7e1faSGustavo F. Padovan chan = l2cap_get_chan_by_scid(conn, scid); 306148454079SGustavo F. Padovan if (!chan) 30620a708f8fSGustavo F. Padovan return 0; 30630a708f8fSGustavo F. Padovan 306448454079SGustavo F. Padovan sk = chan->sk; 306548454079SGustavo F. Padovan 306648454079SGustavo F. Padovan l2cap_chan_del(chan, 0); 3067aa2ac881SGustavo F. Padovan release_sock(sk); 30680a708f8fSGustavo F. Padovan 3069ba3bd0eeSGustavo F. Padovan chan->ops->close(chan->data); 30700a708f8fSGustavo F. Padovan return 0; 30710a708f8fSGustavo F. Padovan } 30720a708f8fSGustavo F. Padovan 30730a708f8fSGustavo F. Padovan static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) 30740a708f8fSGustavo F. Padovan { 30750a708f8fSGustavo F. Padovan struct l2cap_info_req *req = (struct l2cap_info_req *) data; 30760a708f8fSGustavo F. Padovan u16 type; 30770a708f8fSGustavo F. Padovan 30780a708f8fSGustavo F. Padovan type = __le16_to_cpu(req->type); 30790a708f8fSGustavo F. Padovan 30800a708f8fSGustavo F. Padovan BT_DBG("type 0x%4.4x", type); 30810a708f8fSGustavo F. Padovan 30820a708f8fSGustavo F. Padovan if (type == L2CAP_IT_FEAT_MASK) { 30830a708f8fSGustavo F. Padovan u8 buf[8]; 30840a708f8fSGustavo F. Padovan u32 feat_mask = l2cap_feat_mask; 30850a708f8fSGustavo F. Padovan struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; 30860a708f8fSGustavo F. Padovan rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); 30870a708f8fSGustavo F. Padovan rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); 30880a708f8fSGustavo F. Padovan if (!disable_ertm) 30890a708f8fSGustavo F. Padovan feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING 30900a708f8fSGustavo F. Padovan | L2CAP_FEAT_FCS; 3091a5fd6f30SAndrei Emeltchenko if (enable_hs) 30926327eb98SAndrei Emeltchenko feat_mask |= L2CAP_FEAT_EXT_FLOW 30936327eb98SAndrei Emeltchenko | L2CAP_FEAT_EXT_WINDOW; 3094a5fd6f30SAndrei Emeltchenko 30950a708f8fSGustavo F. Padovan put_unaligned_le32(feat_mask, rsp->data); 30960a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, 30970a708f8fSGustavo F. Padovan L2CAP_INFO_RSP, sizeof(buf), buf); 30980a708f8fSGustavo F. Padovan } else if (type == L2CAP_IT_FIXED_CHAN) { 30990a708f8fSGustavo F. Padovan u8 buf[12]; 31000a708f8fSGustavo F. Padovan struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; 310150a147cdSMat Martineau 310250a147cdSMat Martineau if (enable_hs) 310350a147cdSMat Martineau l2cap_fixed_chan[0] |= L2CAP_FC_A2MP; 310450a147cdSMat Martineau else 310550a147cdSMat Martineau l2cap_fixed_chan[0] &= ~L2CAP_FC_A2MP; 310650a147cdSMat Martineau 31070a708f8fSGustavo F. Padovan rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); 31080a708f8fSGustavo F. Padovan rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); 3109c6337ea6SAndrei Emeltchenko memcpy(rsp->data, l2cap_fixed_chan, sizeof(l2cap_fixed_chan)); 31100a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, 31110a708f8fSGustavo F. Padovan L2CAP_INFO_RSP, sizeof(buf), buf); 31120a708f8fSGustavo F. Padovan } else { 31130a708f8fSGustavo F. Padovan struct l2cap_info_rsp rsp; 31140a708f8fSGustavo F. Padovan rsp.type = cpu_to_le16(type); 31150a708f8fSGustavo F. Padovan rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); 31160a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd->ident, 31170a708f8fSGustavo F. Padovan L2CAP_INFO_RSP, sizeof(rsp), &rsp); 31180a708f8fSGustavo F. Padovan } 31190a708f8fSGustavo F. Padovan 31200a708f8fSGustavo F. Padovan return 0; 31210a708f8fSGustavo F. Padovan } 31220a708f8fSGustavo F. Padovan 31230a708f8fSGustavo F. Padovan static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) 31240a708f8fSGustavo F. Padovan { 31250a708f8fSGustavo F. Padovan struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; 31260a708f8fSGustavo F. Padovan u16 type, result; 31270a708f8fSGustavo F. Padovan 31280a708f8fSGustavo F. Padovan type = __le16_to_cpu(rsp->type); 31290a708f8fSGustavo F. Padovan result = __le16_to_cpu(rsp->result); 31300a708f8fSGustavo F. Padovan 31310a708f8fSGustavo F. Padovan BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); 31320a708f8fSGustavo F. Padovan 3133e90165beSAndrei Emeltchenko /* L2CAP Info req/rsp are unbound to channels, add extra checks */ 3134e90165beSAndrei Emeltchenko if (cmd->ident != conn->info_ident || 3135e90165beSAndrei Emeltchenko conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) 3136e90165beSAndrei Emeltchenko return 0; 3137e90165beSAndrei Emeltchenko 313817cd3f37SUlisses Furquim cancel_delayed_work(&conn->info_timer); 31390a708f8fSGustavo F. Padovan 31400a708f8fSGustavo F. Padovan if (result != L2CAP_IR_SUCCESS) { 31410a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; 31420a708f8fSGustavo F. Padovan conn->info_ident = 0; 31430a708f8fSGustavo F. Padovan 31440a708f8fSGustavo F. Padovan l2cap_conn_start(conn); 31450a708f8fSGustavo F. Padovan 31460a708f8fSGustavo F. Padovan return 0; 31470a708f8fSGustavo F. Padovan } 31480a708f8fSGustavo F. Padovan 31490a708f8fSGustavo F. Padovan if (type == L2CAP_IT_FEAT_MASK) { 31500a708f8fSGustavo F. Padovan conn->feat_mask = get_unaligned_le32(rsp->data); 31510a708f8fSGustavo F. Padovan 31520a708f8fSGustavo F. Padovan if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { 31530a708f8fSGustavo F. Padovan struct l2cap_info_req req; 31540a708f8fSGustavo F. Padovan req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); 31550a708f8fSGustavo F. Padovan 31560a708f8fSGustavo F. Padovan conn->info_ident = l2cap_get_ident(conn); 31570a708f8fSGustavo F. Padovan 31580a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, conn->info_ident, 31590a708f8fSGustavo F. Padovan L2CAP_INFO_REQ, sizeof(req), &req); 31600a708f8fSGustavo F. Padovan } else { 31610a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; 31620a708f8fSGustavo F. Padovan conn->info_ident = 0; 31630a708f8fSGustavo F. Padovan 31640a708f8fSGustavo F. Padovan l2cap_conn_start(conn); 31650a708f8fSGustavo F. Padovan } 31660a708f8fSGustavo F. Padovan } else if (type == L2CAP_IT_FIXED_CHAN) { 31670a708f8fSGustavo F. Padovan conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; 31680a708f8fSGustavo F. Padovan conn->info_ident = 0; 31690a708f8fSGustavo F. Padovan 31700a708f8fSGustavo F. Padovan l2cap_conn_start(conn); 31710a708f8fSGustavo F. Padovan } 31720a708f8fSGustavo F. Padovan 31730a708f8fSGustavo F. Padovan return 0; 31740a708f8fSGustavo F. Padovan } 31750a708f8fSGustavo F. Padovan 3176f94ff6ffSMat Martineau static inline int l2cap_create_channel_req(struct l2cap_conn *conn, 3177f94ff6ffSMat Martineau struct l2cap_cmd_hdr *cmd, u16 cmd_len, 3178f94ff6ffSMat Martineau void *data) 3179f94ff6ffSMat Martineau { 3180f94ff6ffSMat Martineau struct l2cap_create_chan_req *req = data; 3181f94ff6ffSMat Martineau struct l2cap_create_chan_rsp rsp; 3182f94ff6ffSMat Martineau u16 psm, scid; 3183f94ff6ffSMat Martineau 3184f94ff6ffSMat Martineau if (cmd_len != sizeof(*req)) 3185f94ff6ffSMat Martineau return -EPROTO; 3186f94ff6ffSMat Martineau 3187f94ff6ffSMat Martineau if (!enable_hs) 3188f94ff6ffSMat Martineau return -EINVAL; 3189f94ff6ffSMat Martineau 3190f94ff6ffSMat Martineau psm = le16_to_cpu(req->psm); 3191f94ff6ffSMat Martineau scid = le16_to_cpu(req->scid); 3192f94ff6ffSMat Martineau 3193f94ff6ffSMat Martineau BT_DBG("psm %d, scid %d, amp_id %d", psm, scid, req->amp_id); 3194f94ff6ffSMat Martineau 3195f94ff6ffSMat Martineau /* Placeholder: Always reject */ 3196f94ff6ffSMat Martineau rsp.dcid = 0; 3197f94ff6ffSMat Martineau rsp.scid = cpu_to_le16(scid); 3198f94ff6ffSMat Martineau rsp.result = L2CAP_CR_NO_MEM; 3199f94ff6ffSMat Martineau rsp.status = L2CAP_CS_NO_INFO; 3200f94ff6ffSMat Martineau 3201f94ff6ffSMat Martineau l2cap_send_cmd(conn, cmd->ident, L2CAP_CREATE_CHAN_RSP, 3202f94ff6ffSMat Martineau sizeof(rsp), &rsp); 3203f94ff6ffSMat Martineau 3204f94ff6ffSMat Martineau return 0; 3205f94ff6ffSMat Martineau } 3206f94ff6ffSMat Martineau 3207f94ff6ffSMat Martineau static inline int l2cap_create_channel_rsp(struct l2cap_conn *conn, 3208f94ff6ffSMat Martineau struct l2cap_cmd_hdr *cmd, void *data) 3209f94ff6ffSMat Martineau { 3210f94ff6ffSMat Martineau BT_DBG("conn %p", conn); 3211f94ff6ffSMat Martineau 3212f94ff6ffSMat Martineau return l2cap_connect_rsp(conn, cmd, data); 3213f94ff6ffSMat Martineau } 3214f94ff6ffSMat Martineau 32158d5a04a1SMat Martineau static void l2cap_send_move_chan_rsp(struct l2cap_conn *conn, u8 ident, 32168d5a04a1SMat Martineau u16 icid, u16 result) 32178d5a04a1SMat Martineau { 32188d5a04a1SMat Martineau struct l2cap_move_chan_rsp rsp; 32198d5a04a1SMat Martineau 32208d5a04a1SMat Martineau BT_DBG("icid %d, result %d", icid, result); 32218d5a04a1SMat Martineau 32228d5a04a1SMat Martineau rsp.icid = cpu_to_le16(icid); 32238d5a04a1SMat Martineau rsp.result = cpu_to_le16(result); 32248d5a04a1SMat Martineau 32258d5a04a1SMat Martineau l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_RSP, sizeof(rsp), &rsp); 32268d5a04a1SMat Martineau } 32278d5a04a1SMat Martineau 32288d5a04a1SMat Martineau static void l2cap_send_move_chan_cfm(struct l2cap_conn *conn, 32298d5a04a1SMat Martineau struct l2cap_chan *chan, u16 icid, u16 result) 32308d5a04a1SMat Martineau { 32318d5a04a1SMat Martineau struct l2cap_move_chan_cfm cfm; 32328d5a04a1SMat Martineau u8 ident; 32338d5a04a1SMat Martineau 32348d5a04a1SMat Martineau BT_DBG("icid %d, result %d", icid, result); 32358d5a04a1SMat Martineau 32368d5a04a1SMat Martineau ident = l2cap_get_ident(conn); 32378d5a04a1SMat Martineau if (chan) 32388d5a04a1SMat Martineau chan->ident = ident; 32398d5a04a1SMat Martineau 32408d5a04a1SMat Martineau cfm.icid = cpu_to_le16(icid); 32418d5a04a1SMat Martineau cfm.result = cpu_to_le16(result); 32428d5a04a1SMat Martineau 32438d5a04a1SMat Martineau l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM, sizeof(cfm), &cfm); 32448d5a04a1SMat Martineau } 32458d5a04a1SMat Martineau 32468d5a04a1SMat Martineau static void l2cap_send_move_chan_cfm_rsp(struct l2cap_conn *conn, u8 ident, 32478d5a04a1SMat Martineau u16 icid) 32488d5a04a1SMat Martineau { 32498d5a04a1SMat Martineau struct l2cap_move_chan_cfm_rsp rsp; 32508d5a04a1SMat Martineau 32518d5a04a1SMat Martineau BT_DBG("icid %d", icid); 32528d5a04a1SMat Martineau 32538d5a04a1SMat Martineau rsp.icid = cpu_to_le16(icid); 32548d5a04a1SMat Martineau l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM_RSP, sizeof(rsp), &rsp); 32558d5a04a1SMat Martineau } 32568d5a04a1SMat Martineau 32578d5a04a1SMat Martineau static inline int l2cap_move_channel_req(struct l2cap_conn *conn, 32588d5a04a1SMat Martineau struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) 32598d5a04a1SMat Martineau { 32608d5a04a1SMat Martineau struct l2cap_move_chan_req *req = data; 32618d5a04a1SMat Martineau u16 icid = 0; 32628d5a04a1SMat Martineau u16 result = L2CAP_MR_NOT_ALLOWED; 32638d5a04a1SMat Martineau 32648d5a04a1SMat Martineau if (cmd_len != sizeof(*req)) 32658d5a04a1SMat Martineau return -EPROTO; 32668d5a04a1SMat Martineau 32678d5a04a1SMat Martineau icid = le16_to_cpu(req->icid); 32688d5a04a1SMat Martineau 32698d5a04a1SMat Martineau BT_DBG("icid %d, dest_amp_id %d", icid, req->dest_amp_id); 32708d5a04a1SMat Martineau 32718d5a04a1SMat Martineau if (!enable_hs) 32728d5a04a1SMat Martineau return -EINVAL; 32738d5a04a1SMat Martineau 32748d5a04a1SMat Martineau /* Placeholder: Always refuse */ 32758d5a04a1SMat Martineau l2cap_send_move_chan_rsp(conn, cmd->ident, icid, result); 32768d5a04a1SMat Martineau 32778d5a04a1SMat Martineau return 0; 32788d5a04a1SMat Martineau } 32798d5a04a1SMat Martineau 32808d5a04a1SMat Martineau static inline int l2cap_move_channel_rsp(struct l2cap_conn *conn, 32818d5a04a1SMat Martineau struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) 32828d5a04a1SMat Martineau { 32838d5a04a1SMat Martineau struct l2cap_move_chan_rsp *rsp = data; 32848d5a04a1SMat Martineau u16 icid, result; 32858d5a04a1SMat Martineau 32868d5a04a1SMat Martineau if (cmd_len != sizeof(*rsp)) 32878d5a04a1SMat Martineau return -EPROTO; 32888d5a04a1SMat Martineau 32898d5a04a1SMat Martineau icid = le16_to_cpu(rsp->icid); 32908d5a04a1SMat Martineau result = le16_to_cpu(rsp->result); 32918d5a04a1SMat Martineau 32928d5a04a1SMat Martineau BT_DBG("icid %d, result %d", icid, result); 32938d5a04a1SMat Martineau 32948d5a04a1SMat Martineau /* Placeholder: Always unconfirmed */ 32958d5a04a1SMat Martineau l2cap_send_move_chan_cfm(conn, NULL, icid, L2CAP_MC_UNCONFIRMED); 32968d5a04a1SMat Martineau 32978d5a04a1SMat Martineau return 0; 32988d5a04a1SMat Martineau } 32998d5a04a1SMat Martineau 33008d5a04a1SMat Martineau static inline int l2cap_move_channel_confirm(struct l2cap_conn *conn, 33018d5a04a1SMat Martineau struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) 33028d5a04a1SMat Martineau { 33038d5a04a1SMat Martineau struct l2cap_move_chan_cfm *cfm = data; 33048d5a04a1SMat Martineau u16 icid, result; 33058d5a04a1SMat Martineau 33068d5a04a1SMat Martineau if (cmd_len != sizeof(*cfm)) 33078d5a04a1SMat Martineau return -EPROTO; 33088d5a04a1SMat Martineau 33098d5a04a1SMat Martineau icid = le16_to_cpu(cfm->icid); 33108d5a04a1SMat Martineau result = le16_to_cpu(cfm->result); 33118d5a04a1SMat Martineau 33128d5a04a1SMat Martineau BT_DBG("icid %d, result %d", icid, result); 33138d5a04a1SMat Martineau 33148d5a04a1SMat Martineau l2cap_send_move_chan_cfm_rsp(conn, cmd->ident, icid); 33158d5a04a1SMat Martineau 33168d5a04a1SMat Martineau return 0; 33178d5a04a1SMat Martineau } 33188d5a04a1SMat Martineau 33198d5a04a1SMat Martineau static inline int l2cap_move_channel_confirm_rsp(struct l2cap_conn *conn, 33208d5a04a1SMat Martineau struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) 33218d5a04a1SMat Martineau { 33228d5a04a1SMat Martineau struct l2cap_move_chan_cfm_rsp *rsp = data; 33238d5a04a1SMat Martineau u16 icid; 33248d5a04a1SMat Martineau 33258d5a04a1SMat Martineau if (cmd_len != sizeof(*rsp)) 33268d5a04a1SMat Martineau return -EPROTO; 33278d5a04a1SMat Martineau 33288d5a04a1SMat Martineau icid = le16_to_cpu(rsp->icid); 33298d5a04a1SMat Martineau 33308d5a04a1SMat Martineau BT_DBG("icid %d", icid); 33318d5a04a1SMat Martineau 33328d5a04a1SMat Martineau return 0; 33338d5a04a1SMat Martineau } 33348d5a04a1SMat Martineau 3335e2174ca4SGustavo F. Padovan static inline int l2cap_check_conn_param(u16 min, u16 max, u16 latency, 3336de73115aSClaudio Takahasi u16 to_multiplier) 3337de73115aSClaudio Takahasi { 3338de73115aSClaudio Takahasi u16 max_latency; 3339de73115aSClaudio Takahasi 3340de73115aSClaudio Takahasi if (min > max || min < 6 || max > 3200) 3341de73115aSClaudio Takahasi return -EINVAL; 3342de73115aSClaudio Takahasi 3343de73115aSClaudio Takahasi if (to_multiplier < 10 || to_multiplier > 3200) 3344de73115aSClaudio Takahasi return -EINVAL; 3345de73115aSClaudio Takahasi 3346de73115aSClaudio Takahasi if (max >= to_multiplier * 8) 3347de73115aSClaudio Takahasi return -EINVAL; 3348de73115aSClaudio Takahasi 3349de73115aSClaudio Takahasi max_latency = (to_multiplier * 8 / max) - 1; 3350de73115aSClaudio Takahasi if (latency > 499 || latency > max_latency) 3351de73115aSClaudio Takahasi return -EINVAL; 3352de73115aSClaudio Takahasi 3353de73115aSClaudio Takahasi return 0; 3354de73115aSClaudio Takahasi } 3355de73115aSClaudio Takahasi 3356de73115aSClaudio Takahasi static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn, 3357de73115aSClaudio Takahasi struct l2cap_cmd_hdr *cmd, u8 *data) 3358de73115aSClaudio Takahasi { 3359de73115aSClaudio Takahasi struct hci_conn *hcon = conn->hcon; 3360de73115aSClaudio Takahasi struct l2cap_conn_param_update_req *req; 3361de73115aSClaudio Takahasi struct l2cap_conn_param_update_rsp rsp; 3362de73115aSClaudio Takahasi u16 min, max, latency, to_multiplier, cmd_len; 33632ce603ebSClaudio Takahasi int err; 3364de73115aSClaudio Takahasi 3365de73115aSClaudio Takahasi if (!(hcon->link_mode & HCI_LM_MASTER)) 3366de73115aSClaudio Takahasi return -EINVAL; 3367de73115aSClaudio Takahasi 3368de73115aSClaudio Takahasi cmd_len = __le16_to_cpu(cmd->len); 3369de73115aSClaudio Takahasi if (cmd_len != sizeof(struct l2cap_conn_param_update_req)) 3370de73115aSClaudio Takahasi return -EPROTO; 3371de73115aSClaudio Takahasi 3372de73115aSClaudio Takahasi req = (struct l2cap_conn_param_update_req *) data; 3373de73115aSClaudio Takahasi min = __le16_to_cpu(req->min); 3374de73115aSClaudio Takahasi max = __le16_to_cpu(req->max); 3375de73115aSClaudio Takahasi latency = __le16_to_cpu(req->latency); 3376de73115aSClaudio Takahasi to_multiplier = __le16_to_cpu(req->to_multiplier); 3377de73115aSClaudio Takahasi 3378de73115aSClaudio Takahasi BT_DBG("min 0x%4.4x max 0x%4.4x latency: 0x%4.4x Timeout: 0x%4.4x", 3379de73115aSClaudio Takahasi min, max, latency, to_multiplier); 3380de73115aSClaudio Takahasi 3381de73115aSClaudio Takahasi memset(&rsp, 0, sizeof(rsp)); 33822ce603ebSClaudio Takahasi 33832ce603ebSClaudio Takahasi err = l2cap_check_conn_param(min, max, latency, to_multiplier); 33842ce603ebSClaudio Takahasi if (err) 3385de73115aSClaudio Takahasi rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_REJECTED); 3386de73115aSClaudio Takahasi else 3387de73115aSClaudio Takahasi rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_ACCEPTED); 3388de73115aSClaudio Takahasi 3389de73115aSClaudio Takahasi l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_PARAM_UPDATE_RSP, 3390de73115aSClaudio Takahasi sizeof(rsp), &rsp); 3391de73115aSClaudio Takahasi 33922ce603ebSClaudio Takahasi if (!err) 33932ce603ebSClaudio Takahasi hci_le_conn_update(hcon, min, max, latency, to_multiplier); 33942ce603ebSClaudio Takahasi 3395de73115aSClaudio Takahasi return 0; 3396de73115aSClaudio Takahasi } 3397de73115aSClaudio Takahasi 33983300d9a9SClaudio Takahasi static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn, 33993300d9a9SClaudio Takahasi struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) 34003300d9a9SClaudio Takahasi { 34013300d9a9SClaudio Takahasi int err = 0; 34023300d9a9SClaudio Takahasi 34033300d9a9SClaudio Takahasi switch (cmd->code) { 34043300d9a9SClaudio Takahasi case L2CAP_COMMAND_REJ: 34053300d9a9SClaudio Takahasi l2cap_command_rej(conn, cmd, data); 34063300d9a9SClaudio Takahasi break; 34073300d9a9SClaudio Takahasi 34083300d9a9SClaudio Takahasi case L2CAP_CONN_REQ: 34093300d9a9SClaudio Takahasi err = l2cap_connect_req(conn, cmd, data); 34103300d9a9SClaudio Takahasi break; 34113300d9a9SClaudio Takahasi 34123300d9a9SClaudio Takahasi case L2CAP_CONN_RSP: 34133300d9a9SClaudio Takahasi err = l2cap_connect_rsp(conn, cmd, data); 34143300d9a9SClaudio Takahasi break; 34153300d9a9SClaudio Takahasi 34163300d9a9SClaudio Takahasi case L2CAP_CONF_REQ: 34173300d9a9SClaudio Takahasi err = l2cap_config_req(conn, cmd, cmd_len, data); 34183300d9a9SClaudio Takahasi break; 34193300d9a9SClaudio Takahasi 34203300d9a9SClaudio Takahasi case L2CAP_CONF_RSP: 34213300d9a9SClaudio Takahasi err = l2cap_config_rsp(conn, cmd, data); 34223300d9a9SClaudio Takahasi break; 34233300d9a9SClaudio Takahasi 34243300d9a9SClaudio Takahasi case L2CAP_DISCONN_REQ: 34253300d9a9SClaudio Takahasi err = l2cap_disconnect_req(conn, cmd, data); 34263300d9a9SClaudio Takahasi break; 34273300d9a9SClaudio Takahasi 34283300d9a9SClaudio Takahasi case L2CAP_DISCONN_RSP: 34293300d9a9SClaudio Takahasi err = l2cap_disconnect_rsp(conn, cmd, data); 34303300d9a9SClaudio Takahasi break; 34313300d9a9SClaudio Takahasi 34323300d9a9SClaudio Takahasi case L2CAP_ECHO_REQ: 34333300d9a9SClaudio Takahasi l2cap_send_cmd(conn, cmd->ident, L2CAP_ECHO_RSP, cmd_len, data); 34343300d9a9SClaudio Takahasi break; 34353300d9a9SClaudio Takahasi 34363300d9a9SClaudio Takahasi case L2CAP_ECHO_RSP: 34373300d9a9SClaudio Takahasi break; 34383300d9a9SClaudio Takahasi 34393300d9a9SClaudio Takahasi case L2CAP_INFO_REQ: 34403300d9a9SClaudio Takahasi err = l2cap_information_req(conn, cmd, data); 34413300d9a9SClaudio Takahasi break; 34423300d9a9SClaudio Takahasi 34433300d9a9SClaudio Takahasi case L2CAP_INFO_RSP: 34443300d9a9SClaudio Takahasi err = l2cap_information_rsp(conn, cmd, data); 34453300d9a9SClaudio Takahasi break; 34463300d9a9SClaudio Takahasi 3447f94ff6ffSMat Martineau case L2CAP_CREATE_CHAN_REQ: 3448f94ff6ffSMat Martineau err = l2cap_create_channel_req(conn, cmd, cmd_len, data); 3449f94ff6ffSMat Martineau break; 3450f94ff6ffSMat Martineau 3451f94ff6ffSMat Martineau case L2CAP_CREATE_CHAN_RSP: 3452f94ff6ffSMat Martineau err = l2cap_create_channel_rsp(conn, cmd, data); 3453f94ff6ffSMat Martineau break; 3454f94ff6ffSMat Martineau 34558d5a04a1SMat Martineau case L2CAP_MOVE_CHAN_REQ: 34568d5a04a1SMat Martineau err = l2cap_move_channel_req(conn, cmd, cmd_len, data); 34578d5a04a1SMat Martineau break; 34588d5a04a1SMat Martineau 34598d5a04a1SMat Martineau case L2CAP_MOVE_CHAN_RSP: 34608d5a04a1SMat Martineau err = l2cap_move_channel_rsp(conn, cmd, cmd_len, data); 34618d5a04a1SMat Martineau break; 34628d5a04a1SMat Martineau 34638d5a04a1SMat Martineau case L2CAP_MOVE_CHAN_CFM: 34648d5a04a1SMat Martineau err = l2cap_move_channel_confirm(conn, cmd, cmd_len, data); 34658d5a04a1SMat Martineau break; 34668d5a04a1SMat Martineau 34678d5a04a1SMat Martineau case L2CAP_MOVE_CHAN_CFM_RSP: 34688d5a04a1SMat Martineau err = l2cap_move_channel_confirm_rsp(conn, cmd, cmd_len, data); 34698d5a04a1SMat Martineau break; 34708d5a04a1SMat Martineau 34713300d9a9SClaudio Takahasi default: 34723300d9a9SClaudio Takahasi BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code); 34733300d9a9SClaudio Takahasi err = -EINVAL; 34743300d9a9SClaudio Takahasi break; 34753300d9a9SClaudio Takahasi } 34763300d9a9SClaudio Takahasi 34773300d9a9SClaudio Takahasi return err; 34783300d9a9SClaudio Takahasi } 34793300d9a9SClaudio Takahasi 34803300d9a9SClaudio Takahasi static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn, 34813300d9a9SClaudio Takahasi struct l2cap_cmd_hdr *cmd, u8 *data) 34823300d9a9SClaudio Takahasi { 34833300d9a9SClaudio Takahasi switch (cmd->code) { 34843300d9a9SClaudio Takahasi case L2CAP_COMMAND_REJ: 34853300d9a9SClaudio Takahasi return 0; 34863300d9a9SClaudio Takahasi 34873300d9a9SClaudio Takahasi case L2CAP_CONN_PARAM_UPDATE_REQ: 3488de73115aSClaudio Takahasi return l2cap_conn_param_update_req(conn, cmd, data); 34893300d9a9SClaudio Takahasi 34903300d9a9SClaudio Takahasi case L2CAP_CONN_PARAM_UPDATE_RSP: 34913300d9a9SClaudio Takahasi return 0; 34923300d9a9SClaudio Takahasi 34933300d9a9SClaudio Takahasi default: 34943300d9a9SClaudio Takahasi BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code); 34953300d9a9SClaudio Takahasi return -EINVAL; 34963300d9a9SClaudio Takahasi } 34973300d9a9SClaudio Takahasi } 34983300d9a9SClaudio Takahasi 34993300d9a9SClaudio Takahasi static inline void l2cap_sig_channel(struct l2cap_conn *conn, 35003300d9a9SClaudio Takahasi struct sk_buff *skb) 35010a708f8fSGustavo F. Padovan { 35020a708f8fSGustavo F. Padovan u8 *data = skb->data; 35030a708f8fSGustavo F. Padovan int len = skb->len; 35040a708f8fSGustavo F. Padovan struct l2cap_cmd_hdr cmd; 35053300d9a9SClaudio Takahasi int err; 35060a708f8fSGustavo F. Padovan 35070a708f8fSGustavo F. Padovan l2cap_raw_recv(conn, skb); 35080a708f8fSGustavo F. Padovan 35090a708f8fSGustavo F. Padovan while (len >= L2CAP_CMD_HDR_SIZE) { 35100a708f8fSGustavo F. Padovan u16 cmd_len; 35110a708f8fSGustavo F. Padovan memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); 35120a708f8fSGustavo F. Padovan data += L2CAP_CMD_HDR_SIZE; 35130a708f8fSGustavo F. Padovan len -= L2CAP_CMD_HDR_SIZE; 35140a708f8fSGustavo F. Padovan 35150a708f8fSGustavo F. Padovan cmd_len = le16_to_cpu(cmd.len); 35160a708f8fSGustavo F. Padovan 35170a708f8fSGustavo F. Padovan BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); 35180a708f8fSGustavo F. Padovan 35190a708f8fSGustavo F. Padovan if (cmd_len > len || !cmd.ident) { 35200a708f8fSGustavo F. Padovan BT_DBG("corrupted command"); 35210a708f8fSGustavo F. Padovan break; 35220a708f8fSGustavo F. Padovan } 35230a708f8fSGustavo F. Padovan 35243300d9a9SClaudio Takahasi if (conn->hcon->type == LE_LINK) 35253300d9a9SClaudio Takahasi err = l2cap_le_sig_cmd(conn, &cmd, data); 35263300d9a9SClaudio Takahasi else 35273300d9a9SClaudio Takahasi err = l2cap_bredr_sig_cmd(conn, &cmd, cmd_len, data); 35280a708f8fSGustavo F. Padovan 35290a708f8fSGustavo F. Padovan if (err) { 3530e2fd318eSIlia Kolomisnky struct l2cap_cmd_rej_unk rej; 35312c6d1a2eSGustavo F. Padovan 35322c6d1a2eSGustavo F. Padovan BT_ERR("Wrong link type (%d)", err); 35330a708f8fSGustavo F. Padovan 35340a708f8fSGustavo F. Padovan /* FIXME: Map err to a valid reason */ 3535e2fd318eSIlia Kolomisnky rej.reason = cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD); 35360a708f8fSGustavo F. Padovan l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); 35370a708f8fSGustavo F. Padovan } 35380a708f8fSGustavo F. Padovan 35390a708f8fSGustavo F. Padovan data += cmd_len; 35400a708f8fSGustavo F. Padovan len -= cmd_len; 35410a708f8fSGustavo F. Padovan } 35420a708f8fSGustavo F. Padovan 35430a708f8fSGustavo F. Padovan kfree_skb(skb); 35440a708f8fSGustavo F. Padovan } 35450a708f8fSGustavo F. Padovan 354647d1ec61SGustavo F. Padovan static int l2cap_check_fcs(struct l2cap_chan *chan, struct sk_buff *skb) 35470a708f8fSGustavo F. Padovan { 35480a708f8fSGustavo F. Padovan u16 our_fcs, rcv_fcs; 3549e4ca6d98SAndrei Emeltchenko int hdr_size; 3550e4ca6d98SAndrei Emeltchenko 3551e4ca6d98SAndrei Emeltchenko if (test_bit(FLAG_EXT_CTRL, &chan->flags)) 3552e4ca6d98SAndrei Emeltchenko hdr_size = L2CAP_EXT_HDR_SIZE; 3553e4ca6d98SAndrei Emeltchenko else 3554e4ca6d98SAndrei Emeltchenko hdr_size = L2CAP_ENH_HDR_SIZE; 35550a708f8fSGustavo F. Padovan 355647d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) { 355703a51213SAndrei Emeltchenko skb_trim(skb, skb->len - L2CAP_FCS_SIZE); 35580a708f8fSGustavo F. Padovan rcv_fcs = get_unaligned_le16(skb->data + skb->len); 35590a708f8fSGustavo F. Padovan our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); 35600a708f8fSGustavo F. Padovan 35610a708f8fSGustavo F. Padovan if (our_fcs != rcv_fcs) 35620a708f8fSGustavo F. Padovan return -EBADMSG; 35630a708f8fSGustavo F. Padovan } 35640a708f8fSGustavo F. Padovan return 0; 35650a708f8fSGustavo F. Padovan } 35660a708f8fSGustavo F. Padovan 3567525cd185SGustavo F. Padovan static inline void l2cap_send_i_or_rr_or_rnr(struct l2cap_chan *chan) 35680a708f8fSGustavo F. Padovan { 356988843ab0SAndrei Emeltchenko u32 control = 0; 35700a708f8fSGustavo F. Padovan 35716a026610SGustavo F. Padovan chan->frames_sent = 0; 35720a708f8fSGustavo F. Padovan 35730b209faeSAndrei Emeltchenko control |= __set_reqseq(chan, chan->buffer_seq); 35740a708f8fSGustavo F. Padovan 3575e2ab4353SGustavo F. Padovan if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { 3576ab784b73SAndrei Emeltchenko control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); 3577525cd185SGustavo F. Padovan l2cap_send_sframe(chan, control); 3578e2ab4353SGustavo F. Padovan set_bit(CONN_RNR_SENT, &chan->conn_state); 35790a708f8fSGustavo F. Padovan } 35800a708f8fSGustavo F. Padovan 3581e2ab4353SGustavo F. Padovan if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) 3582525cd185SGustavo F. Padovan l2cap_retransmit_frames(chan); 35830a708f8fSGustavo F. Padovan 3584525cd185SGustavo F. Padovan l2cap_ertm_send(chan); 35850a708f8fSGustavo F. Padovan 3586e2ab4353SGustavo F. Padovan if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state) && 35876a026610SGustavo F. Padovan chan->frames_sent == 0) { 3588ab784b73SAndrei Emeltchenko control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); 3589525cd185SGustavo F. Padovan l2cap_send_sframe(chan, control); 35900a708f8fSGustavo F. Padovan } 35910a708f8fSGustavo F. Padovan } 35920a708f8fSGustavo F. Padovan 3593fb45de7dSAndrei Emeltchenko static int l2cap_add_to_srej_queue(struct l2cap_chan *chan, struct sk_buff *skb, u16 tx_seq, u8 sar) 35940a708f8fSGustavo F. Padovan { 35950a708f8fSGustavo F. Padovan struct sk_buff *next_skb; 35960a708f8fSGustavo F. Padovan int tx_seq_offset, next_tx_seq_offset; 35970a708f8fSGustavo F. Padovan 35980a708f8fSGustavo F. Padovan bt_cb(skb)->tx_seq = tx_seq; 35990a708f8fSGustavo F. Padovan bt_cb(skb)->sar = sar; 36000a708f8fSGustavo F. Padovan 3601f1c6775bSGustavo F. Padovan next_skb = skb_peek(&chan->srej_q); 36020a708f8fSGustavo F. Padovan 3603836be934SAndrei Emeltchenko tx_seq_offset = __seq_offset(chan, tx_seq, chan->buffer_seq); 36040a708f8fSGustavo F. Padovan 3605039d9572SSzymon Janc while (next_skb) { 36060a708f8fSGustavo F. Padovan if (bt_cb(next_skb)->tx_seq == tx_seq) 36070a708f8fSGustavo F. Padovan return -EINVAL; 36080a708f8fSGustavo F. Padovan 3609836be934SAndrei Emeltchenko next_tx_seq_offset = __seq_offset(chan, 3610836be934SAndrei Emeltchenko bt_cb(next_skb)->tx_seq, chan->buffer_seq); 36110a708f8fSGustavo F. Padovan 36120a708f8fSGustavo F. Padovan if (next_tx_seq_offset > tx_seq_offset) { 3613f1c6775bSGustavo F. Padovan __skb_queue_before(&chan->srej_q, next_skb, skb); 36140a708f8fSGustavo F. Padovan return 0; 36150a708f8fSGustavo F. Padovan } 36160a708f8fSGustavo F. Padovan 3617f1c6775bSGustavo F. Padovan if (skb_queue_is_last(&chan->srej_q, next_skb)) 3618039d9572SSzymon Janc next_skb = NULL; 3619039d9572SSzymon Janc else 3620039d9572SSzymon Janc next_skb = skb_queue_next(&chan->srej_q, next_skb); 3621039d9572SSzymon Janc } 36220a708f8fSGustavo F. Padovan 3623f1c6775bSGustavo F. Padovan __skb_queue_tail(&chan->srej_q, skb); 36240a708f8fSGustavo F. Padovan 36250a708f8fSGustavo F. Padovan return 0; 36260a708f8fSGustavo F. Padovan } 36270a708f8fSGustavo F. Padovan 362884084a31SMat Martineau static void append_skb_frag(struct sk_buff *skb, 362984084a31SMat Martineau struct sk_buff *new_frag, struct sk_buff **last_frag) 36300a708f8fSGustavo F. Padovan { 363184084a31SMat Martineau /* skb->len reflects data in skb as well as all fragments 363284084a31SMat Martineau * skb->data_len reflects only data in fragments 363384084a31SMat Martineau */ 363484084a31SMat Martineau if (!skb_has_frag_list(skb)) 363584084a31SMat Martineau skb_shinfo(skb)->frag_list = new_frag; 363684084a31SMat Martineau 363784084a31SMat Martineau new_frag->next = NULL; 363884084a31SMat Martineau 363984084a31SMat Martineau (*last_frag)->next = new_frag; 364084084a31SMat Martineau *last_frag = new_frag; 364184084a31SMat Martineau 364284084a31SMat Martineau skb->len += new_frag->len; 364384084a31SMat Martineau skb->data_len += new_frag->len; 364484084a31SMat Martineau skb->truesize += new_frag->truesize; 364584084a31SMat Martineau } 364684084a31SMat Martineau 364788843ab0SAndrei Emeltchenko static int l2cap_reassemble_sdu(struct l2cap_chan *chan, struct sk_buff *skb, u32 control) 364884084a31SMat Martineau { 364984084a31SMat Martineau int err = -EINVAL; 36500a708f8fSGustavo F. Padovan 36517e0ef6eeSAndrei Emeltchenko switch (__get_ctrl_sar(chan, control)) { 36527e0ef6eeSAndrei Emeltchenko case L2CAP_SAR_UNSEGMENTED: 365384084a31SMat Martineau if (chan->sdu) 365484084a31SMat Martineau break; 36550a708f8fSGustavo F. Padovan 365684084a31SMat Martineau err = chan->ops->recv(chan->data, skb); 365784084a31SMat Martineau break; 36580a708f8fSGustavo F. Padovan 36597e0ef6eeSAndrei Emeltchenko case L2CAP_SAR_START: 366084084a31SMat Martineau if (chan->sdu) 366184084a31SMat Martineau break; 36620a708f8fSGustavo F. Padovan 36636f61fd47SGustavo F. Padovan chan->sdu_len = get_unaligned_le16(skb->data); 366403a51213SAndrei Emeltchenko skb_pull(skb, L2CAP_SDULEN_SIZE); 36650a708f8fSGustavo F. Padovan 366684084a31SMat Martineau if (chan->sdu_len > chan->imtu) { 366784084a31SMat Martineau err = -EMSGSIZE; 366884084a31SMat Martineau break; 366984084a31SMat Martineau } 36700a708f8fSGustavo F. Padovan 367184084a31SMat Martineau if (skb->len >= chan->sdu_len) 367284084a31SMat Martineau break; 367384084a31SMat Martineau 367484084a31SMat Martineau chan->sdu = skb; 367584084a31SMat Martineau chan->sdu_last_frag = skb; 367684084a31SMat Martineau 367784084a31SMat Martineau skb = NULL; 367884084a31SMat Martineau err = 0; 36790a708f8fSGustavo F. Padovan break; 36800a708f8fSGustavo F. Padovan 36817e0ef6eeSAndrei Emeltchenko case L2CAP_SAR_CONTINUE: 36826f61fd47SGustavo F. Padovan if (!chan->sdu) 368384084a31SMat Martineau break; 36840a708f8fSGustavo F. Padovan 368584084a31SMat Martineau append_skb_frag(chan->sdu, skb, 368684084a31SMat Martineau &chan->sdu_last_frag); 368784084a31SMat Martineau skb = NULL; 36880a708f8fSGustavo F. Padovan 368984084a31SMat Martineau if (chan->sdu->len >= chan->sdu_len) 369084084a31SMat Martineau break; 36910a708f8fSGustavo F. Padovan 369284084a31SMat Martineau err = 0; 36930a708f8fSGustavo F. Padovan break; 36940a708f8fSGustavo F. Padovan 36957e0ef6eeSAndrei Emeltchenko case L2CAP_SAR_END: 36966f61fd47SGustavo F. Padovan if (!chan->sdu) 369784084a31SMat Martineau break; 36980a708f8fSGustavo F. Padovan 369984084a31SMat Martineau append_skb_frag(chan->sdu, skb, 370084084a31SMat Martineau &chan->sdu_last_frag); 370184084a31SMat Martineau skb = NULL; 37020a708f8fSGustavo F. Padovan 370384084a31SMat Martineau if (chan->sdu->len != chan->sdu_len) 370484084a31SMat Martineau break; 37050a708f8fSGustavo F. Padovan 370684084a31SMat Martineau err = chan->ops->recv(chan->data, chan->sdu); 37070a708f8fSGustavo F. Padovan 370884084a31SMat Martineau if (!err) { 370984084a31SMat Martineau /* Reassembly complete */ 371084084a31SMat Martineau chan->sdu = NULL; 371184084a31SMat Martineau chan->sdu_last_frag = NULL; 371284084a31SMat Martineau chan->sdu_len = 0; 37130a708f8fSGustavo F. Padovan } 37140a708f8fSGustavo F. Padovan break; 37150a708f8fSGustavo F. Padovan } 37160a708f8fSGustavo F. Padovan 371784084a31SMat Martineau if (err) { 37180a708f8fSGustavo F. Padovan kfree_skb(skb); 37196f61fd47SGustavo F. Padovan kfree_skb(chan->sdu); 37206f61fd47SGustavo F. Padovan chan->sdu = NULL; 372184084a31SMat Martineau chan->sdu_last_frag = NULL; 372284084a31SMat Martineau chan->sdu_len = 0; 372384084a31SMat Martineau } 37240a708f8fSGustavo F. Padovan 372584084a31SMat Martineau return err; 37260a708f8fSGustavo F. Padovan } 37270a708f8fSGustavo F. Padovan 372826f880d2SMat Martineau static void l2cap_ertm_enter_local_busy(struct l2cap_chan *chan) 37290a708f8fSGustavo F. Padovan { 373026f880d2SMat Martineau BT_DBG("chan %p, Enter local busy", chan); 373126f880d2SMat Martineau 373226f880d2SMat Martineau set_bit(CONN_LOCAL_BUSY, &chan->conn_state); 373326f880d2SMat Martineau 373477f918bcSSzymon Janc __set_ack_timer(chan); 37350a708f8fSGustavo F. Padovan } 37360a708f8fSGustavo F. Padovan 373726f880d2SMat Martineau static void l2cap_ertm_exit_local_busy(struct l2cap_chan *chan) 373826f880d2SMat Martineau { 373988843ab0SAndrei Emeltchenko u32 control; 37400a708f8fSGustavo F. Padovan 3741e2ab4353SGustavo F. Padovan if (!test_bit(CONN_RNR_SENT, &chan->conn_state)) 37420a708f8fSGustavo F. Padovan goto done; 37430a708f8fSGustavo F. Padovan 37440b209faeSAndrei Emeltchenko control = __set_reqseq(chan, chan->buffer_seq); 3745e3781735SAndrei Emeltchenko control |= __set_ctrl_poll(chan); 3746ab784b73SAndrei Emeltchenko control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); 3747525cd185SGustavo F. Padovan l2cap_send_sframe(chan, control); 37486a026610SGustavo F. Padovan chan->retry_count = 1; 37490a708f8fSGustavo F. Padovan 37501a09bcb9SGustavo F. Padovan __clear_retrans_timer(chan); 37511a09bcb9SGustavo F. Padovan __set_monitor_timer(chan); 37520a708f8fSGustavo F. Padovan 3753e2ab4353SGustavo F. Padovan set_bit(CONN_WAIT_F, &chan->conn_state); 37540a708f8fSGustavo F. Padovan 37550a708f8fSGustavo F. Padovan done: 3756e2ab4353SGustavo F. Padovan clear_bit(CONN_LOCAL_BUSY, &chan->conn_state); 3757e2ab4353SGustavo F. Padovan clear_bit(CONN_RNR_SENT, &chan->conn_state); 37580a708f8fSGustavo F. Padovan 375949208c9cSGustavo F. Padovan BT_DBG("chan %p, Exit local busy", chan); 37600a708f8fSGustavo F. Padovan } 37610a708f8fSGustavo F. Padovan 3762e328140fSMat Martineau void l2cap_chan_busy(struct l2cap_chan *chan, int busy) 37630a708f8fSGustavo F. Padovan { 3764e328140fSMat Martineau if (chan->mode == L2CAP_MODE_ERTM) { 3765e328140fSMat Martineau if (busy) 376626f880d2SMat Martineau l2cap_ertm_enter_local_busy(chan); 3767e328140fSMat Martineau else 3768e328140fSMat Martineau l2cap_ertm_exit_local_busy(chan); 37690a708f8fSGustavo F. Padovan } 37700a708f8fSGustavo F. Padovan } 37710a708f8fSGustavo F. Padovan 3772fb45de7dSAndrei Emeltchenko static void l2cap_check_srej_gap(struct l2cap_chan *chan, u16 tx_seq) 37730a708f8fSGustavo F. Padovan { 37740a708f8fSGustavo F. Padovan struct sk_buff *skb; 377588843ab0SAndrei Emeltchenko u32 control; 37760a708f8fSGustavo F. Padovan 3777e328140fSMat Martineau while ((skb = skb_peek(&chan->srej_q)) && 3778e328140fSMat Martineau !test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { 3779e328140fSMat Martineau int err; 3780e328140fSMat Martineau 37810a708f8fSGustavo F. Padovan if (bt_cb(skb)->tx_seq != tx_seq) 37820a708f8fSGustavo F. Padovan break; 37830a708f8fSGustavo F. Padovan 3784f1c6775bSGustavo F. Padovan skb = skb_dequeue(&chan->srej_q); 37857e0ef6eeSAndrei Emeltchenko control = __set_ctrl_sar(chan, bt_cb(skb)->sar); 378684084a31SMat Martineau err = l2cap_reassemble_sdu(chan, skb, control); 3787e328140fSMat Martineau 3788e328140fSMat Martineau if (err < 0) { 3789e328140fSMat Martineau l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); 3790e328140fSMat Martineau break; 3791e328140fSMat Martineau } 3792e328140fSMat Martineau 3793836be934SAndrei Emeltchenko chan->buffer_seq_srej = __next_seq(chan, chan->buffer_seq_srej); 3794836be934SAndrei Emeltchenko tx_seq = __next_seq(chan, tx_seq); 37950a708f8fSGustavo F. Padovan } 37960a708f8fSGustavo F. Padovan } 37970a708f8fSGustavo F. Padovan 3798fb45de7dSAndrei Emeltchenko static void l2cap_resend_srejframe(struct l2cap_chan *chan, u16 tx_seq) 37990a708f8fSGustavo F. Padovan { 38000a708f8fSGustavo F. Padovan struct srej_list *l, *tmp; 380188843ab0SAndrei Emeltchenko u32 control; 38020a708f8fSGustavo F. Padovan 380339d5a3eeSGustavo F. Padovan list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { 38040a708f8fSGustavo F. Padovan if (l->tx_seq == tx_seq) { 38050a708f8fSGustavo F. Padovan list_del(&l->list); 38060a708f8fSGustavo F. Padovan kfree(l); 38070a708f8fSGustavo F. Padovan return; 38080a708f8fSGustavo F. Padovan } 3809ab784b73SAndrei Emeltchenko control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); 38100b209faeSAndrei Emeltchenko control |= __set_reqseq(chan, l->tx_seq); 3811525cd185SGustavo F. Padovan l2cap_send_sframe(chan, control); 38120a708f8fSGustavo F. Padovan list_del(&l->list); 381339d5a3eeSGustavo F. Padovan list_add_tail(&l->list, &chan->srej_l); 38140a708f8fSGustavo F. Padovan } 38150a708f8fSGustavo F. Padovan } 38160a708f8fSGustavo F. Padovan 3817aef89f21SSzymon Janc static int l2cap_send_srejframe(struct l2cap_chan *chan, u16 tx_seq) 38180a708f8fSGustavo F. Padovan { 38190a708f8fSGustavo F. Padovan struct srej_list *new; 382088843ab0SAndrei Emeltchenko u32 control; 38210a708f8fSGustavo F. Padovan 382242e5c802SGustavo F. Padovan while (tx_seq != chan->expected_tx_seq) { 3823ab784b73SAndrei Emeltchenko control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); 38240b209faeSAndrei Emeltchenko control |= __set_reqseq(chan, chan->expected_tx_seq); 3825525cd185SGustavo F. Padovan l2cap_send_sframe(chan, control); 38260a708f8fSGustavo F. Padovan 38270a708f8fSGustavo F. Padovan new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); 3828aef89f21SSzymon Janc if (!new) 3829aef89f21SSzymon Janc return -ENOMEM; 3830aef89f21SSzymon Janc 383142e5c802SGustavo F. Padovan new->tx_seq = chan->expected_tx_seq; 3832836be934SAndrei Emeltchenko 3833836be934SAndrei Emeltchenko chan->expected_tx_seq = __next_seq(chan, chan->expected_tx_seq); 3834836be934SAndrei Emeltchenko 383539d5a3eeSGustavo F. Padovan list_add_tail(&new->list, &chan->srej_l); 38360a708f8fSGustavo F. Padovan } 3837836be934SAndrei Emeltchenko 3838836be934SAndrei Emeltchenko chan->expected_tx_seq = __next_seq(chan, chan->expected_tx_seq); 3839aef89f21SSzymon Janc 3840aef89f21SSzymon Janc return 0; 38410a708f8fSGustavo F. Padovan } 38420a708f8fSGustavo F. Padovan 384388843ab0SAndrei Emeltchenko static inline int l2cap_data_channel_iframe(struct l2cap_chan *chan, u32 rx_control, struct sk_buff *skb) 38440a708f8fSGustavo F. Padovan { 3845fb45de7dSAndrei Emeltchenko u16 tx_seq = __get_txseq(chan, rx_control); 38460b209faeSAndrei Emeltchenko u16 req_seq = __get_reqseq(chan, rx_control); 38477e0ef6eeSAndrei Emeltchenko u8 sar = __get_ctrl_sar(chan, rx_control); 38480a708f8fSGustavo F. Padovan int tx_seq_offset, expected_tx_seq_offset; 384947d1ec61SGustavo F. Padovan int num_to_ack = (chan->tx_win/6) + 1; 38500a708f8fSGustavo F. Padovan int err = 0; 38510a708f8fSGustavo F. Padovan 385288843ab0SAndrei Emeltchenko BT_DBG("chan %p len %d tx_seq %d rx_control 0x%8.8x", chan, skb->len, 3853525cd185SGustavo F. Padovan tx_seq, rx_control); 38540a708f8fSGustavo F. Padovan 385503f6715dSAndrei Emeltchenko if (__is_ctrl_final(chan, rx_control) && 3856e2ab4353SGustavo F. Padovan test_bit(CONN_WAIT_F, &chan->conn_state)) { 38571a09bcb9SGustavo F. Padovan __clear_monitor_timer(chan); 38586a026610SGustavo F. Padovan if (chan->unacked_frames > 0) 38591a09bcb9SGustavo F. Padovan __set_retrans_timer(chan); 3860e2ab4353SGustavo F. Padovan clear_bit(CONN_WAIT_F, &chan->conn_state); 38610a708f8fSGustavo F. Padovan } 38620a708f8fSGustavo F. Padovan 386342e5c802SGustavo F. Padovan chan->expected_ack_seq = req_seq; 386442e5c802SGustavo F. Padovan l2cap_drop_acked_frames(chan); 38650a708f8fSGustavo F. Padovan 3866836be934SAndrei Emeltchenko tx_seq_offset = __seq_offset(chan, tx_seq, chan->buffer_seq); 38670a708f8fSGustavo F. Padovan 38680a708f8fSGustavo F. Padovan /* invalid tx_seq */ 386947d1ec61SGustavo F. Padovan if (tx_seq_offset >= chan->tx_win) { 38708c1d787bSGustavo F. Padovan l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); 38710a708f8fSGustavo F. Padovan goto drop; 38720a708f8fSGustavo F. Padovan } 38730a708f8fSGustavo F. Padovan 387477f918bcSSzymon Janc if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { 387577f918bcSSzymon Janc if (!test_bit(CONN_RNR_SENT, &chan->conn_state)) 387677f918bcSSzymon Janc l2cap_send_ack(chan); 38770a708f8fSGustavo F. Padovan goto drop; 387877f918bcSSzymon Janc } 38790a708f8fSGustavo F. Padovan 388002f1b641SMat Martineau if (tx_seq == chan->expected_tx_seq) 388102f1b641SMat Martineau goto expected; 388202f1b641SMat Martineau 3883e2ab4353SGustavo F. Padovan if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { 38840a708f8fSGustavo F. Padovan struct srej_list *first; 38850a708f8fSGustavo F. Padovan 388639d5a3eeSGustavo F. Padovan first = list_first_entry(&chan->srej_l, 38870a708f8fSGustavo F. Padovan struct srej_list, list); 38880a708f8fSGustavo F. Padovan if (tx_seq == first->tx_seq) { 388942e5c802SGustavo F. Padovan l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); 3890525cd185SGustavo F. Padovan l2cap_check_srej_gap(chan, tx_seq); 38910a708f8fSGustavo F. Padovan 38920a708f8fSGustavo F. Padovan list_del(&first->list); 38930a708f8fSGustavo F. Padovan kfree(first); 38940a708f8fSGustavo F. Padovan 389539d5a3eeSGustavo F. Padovan if (list_empty(&chan->srej_l)) { 389642e5c802SGustavo F. Padovan chan->buffer_seq = chan->buffer_seq_srej; 3897e2ab4353SGustavo F. Padovan clear_bit(CONN_SREJ_SENT, &chan->conn_state); 3898525cd185SGustavo F. Padovan l2cap_send_ack(chan); 389949208c9cSGustavo F. Padovan BT_DBG("chan %p, Exit SREJ_SENT", chan); 39000a708f8fSGustavo F. Padovan } 39010a708f8fSGustavo F. Padovan } else { 39020a708f8fSGustavo F. Padovan struct srej_list *l; 39030a708f8fSGustavo F. Padovan 39040a708f8fSGustavo F. Padovan /* duplicated tx_seq */ 390542e5c802SGustavo F. Padovan if (l2cap_add_to_srej_queue(chan, skb, tx_seq, sar) < 0) 39060a708f8fSGustavo F. Padovan goto drop; 39070a708f8fSGustavo F. Padovan 390839d5a3eeSGustavo F. Padovan list_for_each_entry(l, &chan->srej_l, list) { 39090a708f8fSGustavo F. Padovan if (l->tx_seq == tx_seq) { 3910525cd185SGustavo F. Padovan l2cap_resend_srejframe(chan, tx_seq); 39110a708f8fSGustavo F. Padovan return 0; 39120a708f8fSGustavo F. Padovan } 39130a708f8fSGustavo F. Padovan } 3914aef89f21SSzymon Janc 3915aef89f21SSzymon Janc err = l2cap_send_srejframe(chan, tx_seq); 3916aef89f21SSzymon Janc if (err < 0) { 3917aef89f21SSzymon Janc l2cap_send_disconn_req(chan->conn, chan, -err); 3918aef89f21SSzymon Janc return err; 3919aef89f21SSzymon Janc } 39200a708f8fSGustavo F. Padovan } 39210a708f8fSGustavo F. Padovan } else { 3922836be934SAndrei Emeltchenko expected_tx_seq_offset = __seq_offset(chan, 3923836be934SAndrei Emeltchenko chan->expected_tx_seq, chan->buffer_seq); 39240a708f8fSGustavo F. Padovan 39250a708f8fSGustavo F. Padovan /* duplicated tx_seq */ 39260a708f8fSGustavo F. Padovan if (tx_seq_offset < expected_tx_seq_offset) 39270a708f8fSGustavo F. Padovan goto drop; 39280a708f8fSGustavo F. Padovan 3929e2ab4353SGustavo F. Padovan set_bit(CONN_SREJ_SENT, &chan->conn_state); 39300a708f8fSGustavo F. Padovan 393149208c9cSGustavo F. Padovan BT_DBG("chan %p, Enter SREJ", chan); 39320a708f8fSGustavo F. Padovan 393339d5a3eeSGustavo F. Padovan INIT_LIST_HEAD(&chan->srej_l); 393442e5c802SGustavo F. Padovan chan->buffer_seq_srej = chan->buffer_seq; 39350a708f8fSGustavo F. Padovan 3936f1c6775bSGustavo F. Padovan __skb_queue_head_init(&chan->srej_q); 393742e5c802SGustavo F. Padovan l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); 39380a708f8fSGustavo F. Padovan 39390ef3ef0fSSzymon Janc /* Set P-bit only if there are some I-frames to ack. */ 39400ef3ef0fSSzymon Janc if (__clear_ack_timer(chan)) 3941e2ab4353SGustavo F. Padovan set_bit(CONN_SEND_PBIT, &chan->conn_state); 39420a708f8fSGustavo F. Padovan 3943aef89f21SSzymon Janc err = l2cap_send_srejframe(chan, tx_seq); 3944aef89f21SSzymon Janc if (err < 0) { 3945aef89f21SSzymon Janc l2cap_send_disconn_req(chan->conn, chan, -err); 3946aef89f21SSzymon Janc return err; 3947aef89f21SSzymon Janc } 39480a708f8fSGustavo F. Padovan } 39490a708f8fSGustavo F. Padovan return 0; 39500a708f8fSGustavo F. Padovan 39510a708f8fSGustavo F. Padovan expected: 3952836be934SAndrei Emeltchenko chan->expected_tx_seq = __next_seq(chan, chan->expected_tx_seq); 39530a708f8fSGustavo F. Padovan 3954e2ab4353SGustavo F. Padovan if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { 39550a708f8fSGustavo F. Padovan bt_cb(skb)->tx_seq = tx_seq; 39560a708f8fSGustavo F. Padovan bt_cb(skb)->sar = sar; 3957f1c6775bSGustavo F. Padovan __skb_queue_tail(&chan->srej_q, skb); 39580a708f8fSGustavo F. Padovan return 0; 39590a708f8fSGustavo F. Padovan } 39600a708f8fSGustavo F. Padovan 396184084a31SMat Martineau err = l2cap_reassemble_sdu(chan, skb, rx_control); 3962836be934SAndrei Emeltchenko chan->buffer_seq = __next_seq(chan, chan->buffer_seq); 3963836be934SAndrei Emeltchenko 3964e328140fSMat Martineau if (err < 0) { 3965e328140fSMat Martineau l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); 3966e328140fSMat Martineau return err; 3967e328140fSMat Martineau } 39680a708f8fSGustavo F. Padovan 396903f6715dSAndrei Emeltchenko if (__is_ctrl_final(chan, rx_control)) { 3970e2ab4353SGustavo F. Padovan if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) 3971525cd185SGustavo F. Padovan l2cap_retransmit_frames(chan); 39720a708f8fSGustavo F. Padovan } 39730a708f8fSGustavo F. Padovan 39740a708f8fSGustavo F. Padovan 39756a026610SGustavo F. Padovan chan->num_acked = (chan->num_acked + 1) % num_to_ack; 39766a026610SGustavo F. Padovan if (chan->num_acked == num_to_ack - 1) 3977525cd185SGustavo F. Padovan l2cap_send_ack(chan); 39784d611e4dSGustavo F. Padovan else 39794d611e4dSGustavo F. Padovan __set_ack_timer(chan); 39800a708f8fSGustavo F. Padovan 39810a708f8fSGustavo F. Padovan return 0; 39820a708f8fSGustavo F. Padovan 39830a708f8fSGustavo F. Padovan drop: 39840a708f8fSGustavo F. Padovan kfree_skb(skb); 39850a708f8fSGustavo F. Padovan return 0; 39860a708f8fSGustavo F. Padovan } 39870a708f8fSGustavo F. Padovan 398888843ab0SAndrei Emeltchenko static inline void l2cap_data_channel_rrframe(struct l2cap_chan *chan, u32 rx_control) 39890a708f8fSGustavo F. Padovan { 399088843ab0SAndrei Emeltchenko BT_DBG("chan %p, req_seq %d ctrl 0x%8.8x", chan, 39910b209faeSAndrei Emeltchenko __get_reqseq(chan, rx_control), rx_control); 39920a708f8fSGustavo F. Padovan 39930b209faeSAndrei Emeltchenko chan->expected_ack_seq = __get_reqseq(chan, rx_control); 399442e5c802SGustavo F. Padovan l2cap_drop_acked_frames(chan); 39950a708f8fSGustavo F. Padovan 3996e3781735SAndrei Emeltchenko if (__is_ctrl_poll(chan, rx_control)) { 3997e2ab4353SGustavo F. Padovan set_bit(CONN_SEND_FBIT, &chan->conn_state); 3998e2ab4353SGustavo F. Padovan if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { 3999e2ab4353SGustavo F. Padovan if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && 40006a026610SGustavo F. Padovan (chan->unacked_frames > 0)) 40011a09bcb9SGustavo F. Padovan __set_retrans_timer(chan); 40020a708f8fSGustavo F. Padovan 4003e2ab4353SGustavo F. Padovan clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); 4004525cd185SGustavo F. Padovan l2cap_send_srejtail(chan); 40050a708f8fSGustavo F. Padovan } else { 4006525cd185SGustavo F. Padovan l2cap_send_i_or_rr_or_rnr(chan); 40070a708f8fSGustavo F. Padovan } 40080a708f8fSGustavo F. Padovan 400903f6715dSAndrei Emeltchenko } else if (__is_ctrl_final(chan, rx_control)) { 4010e2ab4353SGustavo F. Padovan clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); 40110a708f8fSGustavo F. Padovan 4012e2ab4353SGustavo F. Padovan if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) 4013525cd185SGustavo F. Padovan l2cap_retransmit_frames(chan); 40140a708f8fSGustavo F. Padovan 40150a708f8fSGustavo F. Padovan } else { 4016e2ab4353SGustavo F. Padovan if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && 40176a026610SGustavo F. Padovan (chan->unacked_frames > 0)) 40181a09bcb9SGustavo F. Padovan __set_retrans_timer(chan); 40190a708f8fSGustavo F. Padovan 4020e2ab4353SGustavo F. Padovan clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); 4021e2ab4353SGustavo F. Padovan if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) 4022525cd185SGustavo F. Padovan l2cap_send_ack(chan); 40230a708f8fSGustavo F. Padovan else 4024525cd185SGustavo F. Padovan l2cap_ertm_send(chan); 40250a708f8fSGustavo F. Padovan } 40260a708f8fSGustavo F. Padovan } 40270a708f8fSGustavo F. Padovan 402888843ab0SAndrei Emeltchenko static inline void l2cap_data_channel_rejframe(struct l2cap_chan *chan, u32 rx_control) 40290a708f8fSGustavo F. Padovan { 40300b209faeSAndrei Emeltchenko u16 tx_seq = __get_reqseq(chan, rx_control); 40310a708f8fSGustavo F. Padovan 403288843ab0SAndrei Emeltchenko BT_DBG("chan %p, req_seq %d ctrl 0x%8.8x", chan, tx_seq, rx_control); 40330a708f8fSGustavo F. Padovan 4034e2ab4353SGustavo F. Padovan clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); 40350a708f8fSGustavo F. Padovan 403642e5c802SGustavo F. Padovan chan->expected_ack_seq = tx_seq; 403742e5c802SGustavo F. Padovan l2cap_drop_acked_frames(chan); 40380a708f8fSGustavo F. Padovan 403903f6715dSAndrei Emeltchenko if (__is_ctrl_final(chan, rx_control)) { 4040e2ab4353SGustavo F. Padovan if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) 4041525cd185SGustavo F. Padovan l2cap_retransmit_frames(chan); 40420a708f8fSGustavo F. Padovan } else { 4043525cd185SGustavo F. Padovan l2cap_retransmit_frames(chan); 40440a708f8fSGustavo F. Padovan 4045e2ab4353SGustavo F. Padovan if (test_bit(CONN_WAIT_F, &chan->conn_state)) 4046e2ab4353SGustavo F. Padovan set_bit(CONN_REJ_ACT, &chan->conn_state); 40470a708f8fSGustavo F. Padovan } 40480a708f8fSGustavo F. Padovan } 404988843ab0SAndrei Emeltchenko static inline void l2cap_data_channel_srejframe(struct l2cap_chan *chan, u32 rx_control) 40500a708f8fSGustavo F. Padovan { 40510b209faeSAndrei Emeltchenko u16 tx_seq = __get_reqseq(chan, rx_control); 40520a708f8fSGustavo F. Padovan 405388843ab0SAndrei Emeltchenko BT_DBG("chan %p, req_seq %d ctrl 0x%8.8x", chan, tx_seq, rx_control); 40540a708f8fSGustavo F. Padovan 4055e2ab4353SGustavo F. Padovan clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); 40560a708f8fSGustavo F. Padovan 4057e3781735SAndrei Emeltchenko if (__is_ctrl_poll(chan, rx_control)) { 405842e5c802SGustavo F. Padovan chan->expected_ack_seq = tx_seq; 405942e5c802SGustavo F. Padovan l2cap_drop_acked_frames(chan); 40600a708f8fSGustavo F. Padovan 4061e2ab4353SGustavo F. Padovan set_bit(CONN_SEND_FBIT, &chan->conn_state); 4062525cd185SGustavo F. Padovan l2cap_retransmit_one_frame(chan, tx_seq); 40630a708f8fSGustavo F. Padovan 4064525cd185SGustavo F. Padovan l2cap_ertm_send(chan); 40650a708f8fSGustavo F. Padovan 4066e2ab4353SGustavo F. Padovan if (test_bit(CONN_WAIT_F, &chan->conn_state)) { 40676a026610SGustavo F. Padovan chan->srej_save_reqseq = tx_seq; 4068e2ab4353SGustavo F. Padovan set_bit(CONN_SREJ_ACT, &chan->conn_state); 40690a708f8fSGustavo F. Padovan } 407003f6715dSAndrei Emeltchenko } else if (__is_ctrl_final(chan, rx_control)) { 4071e2ab4353SGustavo F. Padovan if (test_bit(CONN_SREJ_ACT, &chan->conn_state) && 40726a026610SGustavo F. Padovan chan->srej_save_reqseq == tx_seq) 4073e2ab4353SGustavo F. Padovan clear_bit(CONN_SREJ_ACT, &chan->conn_state); 40740a708f8fSGustavo F. Padovan else 4075525cd185SGustavo F. Padovan l2cap_retransmit_one_frame(chan, tx_seq); 40760a708f8fSGustavo F. Padovan } else { 4077525cd185SGustavo F. Padovan l2cap_retransmit_one_frame(chan, tx_seq); 4078e2ab4353SGustavo F. Padovan if (test_bit(CONN_WAIT_F, &chan->conn_state)) { 40796a026610SGustavo F. Padovan chan->srej_save_reqseq = tx_seq; 4080e2ab4353SGustavo F. Padovan set_bit(CONN_SREJ_ACT, &chan->conn_state); 40810a708f8fSGustavo F. Padovan } 40820a708f8fSGustavo F. Padovan } 40830a708f8fSGustavo F. Padovan } 40840a708f8fSGustavo F. Padovan 408588843ab0SAndrei Emeltchenko static inline void l2cap_data_channel_rnrframe(struct l2cap_chan *chan, u32 rx_control) 40860a708f8fSGustavo F. Padovan { 40870b209faeSAndrei Emeltchenko u16 tx_seq = __get_reqseq(chan, rx_control); 40880a708f8fSGustavo F. Padovan 408988843ab0SAndrei Emeltchenko BT_DBG("chan %p, req_seq %d ctrl 0x%8.8x", chan, tx_seq, rx_control); 40900a708f8fSGustavo F. Padovan 4091e2ab4353SGustavo F. Padovan set_bit(CONN_REMOTE_BUSY, &chan->conn_state); 409242e5c802SGustavo F. Padovan chan->expected_ack_seq = tx_seq; 409342e5c802SGustavo F. Padovan l2cap_drop_acked_frames(chan); 40940a708f8fSGustavo F. Padovan 4095e3781735SAndrei Emeltchenko if (__is_ctrl_poll(chan, rx_control)) 4096e2ab4353SGustavo F. Padovan set_bit(CONN_SEND_FBIT, &chan->conn_state); 40970a708f8fSGustavo F. Padovan 4098e2ab4353SGustavo F. Padovan if (!test_bit(CONN_SREJ_SENT, &chan->conn_state)) { 40991a09bcb9SGustavo F. Padovan __clear_retrans_timer(chan); 4100e3781735SAndrei Emeltchenko if (__is_ctrl_poll(chan, rx_control)) 4101525cd185SGustavo F. Padovan l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_FINAL); 41020a708f8fSGustavo F. Padovan return; 41030a708f8fSGustavo F. Padovan } 41040a708f8fSGustavo F. Padovan 4105e3781735SAndrei Emeltchenko if (__is_ctrl_poll(chan, rx_control)) { 4106525cd185SGustavo F. Padovan l2cap_send_srejtail(chan); 4107ab784b73SAndrei Emeltchenko } else { 4108ab784b73SAndrei Emeltchenko rx_control = __set_ctrl_super(chan, L2CAP_SUPER_RR); 4109ab784b73SAndrei Emeltchenko l2cap_send_sframe(chan, rx_control); 4110ab784b73SAndrei Emeltchenko } 41110a708f8fSGustavo F. Padovan } 41120a708f8fSGustavo F. Padovan 411388843ab0SAndrei Emeltchenko static inline int l2cap_data_channel_sframe(struct l2cap_chan *chan, u32 rx_control, struct sk_buff *skb) 41140a708f8fSGustavo F. Padovan { 411588843ab0SAndrei Emeltchenko BT_DBG("chan %p rx_control 0x%8.8x len %d", chan, rx_control, skb->len); 41160a708f8fSGustavo F. Padovan 411703f6715dSAndrei Emeltchenko if (__is_ctrl_final(chan, rx_control) && 4118e2ab4353SGustavo F. Padovan test_bit(CONN_WAIT_F, &chan->conn_state)) { 41191a09bcb9SGustavo F. Padovan __clear_monitor_timer(chan); 41206a026610SGustavo F. Padovan if (chan->unacked_frames > 0) 41211a09bcb9SGustavo F. Padovan __set_retrans_timer(chan); 4122e2ab4353SGustavo F. Padovan clear_bit(CONN_WAIT_F, &chan->conn_state); 41230a708f8fSGustavo F. Padovan } 41240a708f8fSGustavo F. Padovan 4125ab784b73SAndrei Emeltchenko switch (__get_ctrl_super(chan, rx_control)) { 4126ab784b73SAndrei Emeltchenko case L2CAP_SUPER_RR: 4127525cd185SGustavo F. Padovan l2cap_data_channel_rrframe(chan, rx_control); 41280a708f8fSGustavo F. Padovan break; 41290a708f8fSGustavo F. Padovan 4130ab784b73SAndrei Emeltchenko case L2CAP_SUPER_REJ: 4131525cd185SGustavo F. Padovan l2cap_data_channel_rejframe(chan, rx_control); 41320a708f8fSGustavo F. Padovan break; 41330a708f8fSGustavo F. Padovan 4134ab784b73SAndrei Emeltchenko case L2CAP_SUPER_SREJ: 4135525cd185SGustavo F. Padovan l2cap_data_channel_srejframe(chan, rx_control); 41360a708f8fSGustavo F. Padovan break; 41370a708f8fSGustavo F. Padovan 4138ab784b73SAndrei Emeltchenko case L2CAP_SUPER_RNR: 4139525cd185SGustavo F. Padovan l2cap_data_channel_rnrframe(chan, rx_control); 41400a708f8fSGustavo F. Padovan break; 41410a708f8fSGustavo F. Padovan } 41420a708f8fSGustavo F. Padovan 41430a708f8fSGustavo F. Padovan kfree_skb(skb); 41440a708f8fSGustavo F. Padovan return 0; 41450a708f8fSGustavo F. Padovan } 41460a708f8fSGustavo F. Padovan 4147cad8f1d0SSzymon Janc static int l2cap_ertm_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb) 41480a708f8fSGustavo F. Padovan { 414988843ab0SAndrei Emeltchenko u32 control; 41500b209faeSAndrei Emeltchenko u16 req_seq; 41510a708f8fSGustavo F. Padovan int len, next_tx_seq_offset, req_seq_offset; 41520a708f8fSGustavo F. Padovan 415388843ab0SAndrei Emeltchenko control = __get_control(chan, skb->data); 415488843ab0SAndrei Emeltchenko skb_pull(skb, __ctrl_size(chan)); 41550a708f8fSGustavo F. Padovan len = skb->len; 41560a708f8fSGustavo F. Padovan 41570a708f8fSGustavo F. Padovan /* 41580a708f8fSGustavo F. Padovan * We can just drop the corrupted I-frame here. 41590a708f8fSGustavo F. Padovan * Receiver will miss it and start proper recovery 41600a708f8fSGustavo F. Padovan * procedures and ask retransmission. 41610a708f8fSGustavo F. Padovan */ 416247d1ec61SGustavo F. Padovan if (l2cap_check_fcs(chan, skb)) 41630a708f8fSGustavo F. Padovan goto drop; 41640a708f8fSGustavo F. Padovan 4165793c2f1cSAndrei Emeltchenko if (__is_sar_start(chan, control) && !__is_sframe(chan, control)) 416603a51213SAndrei Emeltchenko len -= L2CAP_SDULEN_SIZE; 41670a708f8fSGustavo F. Padovan 416847d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) 416903a51213SAndrei Emeltchenko len -= L2CAP_FCS_SIZE; 41700a708f8fSGustavo F. Padovan 417147d1ec61SGustavo F. Padovan if (len > chan->mps) { 41728c1d787bSGustavo F. Padovan l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); 41730a708f8fSGustavo F. Padovan goto drop; 41740a708f8fSGustavo F. Padovan } 41750a708f8fSGustavo F. Padovan 41760b209faeSAndrei Emeltchenko req_seq = __get_reqseq(chan, control); 41770a708f8fSGustavo F. Padovan 4178836be934SAndrei Emeltchenko req_seq_offset = __seq_offset(chan, req_seq, chan->expected_ack_seq); 4179836be934SAndrei Emeltchenko 4180836be934SAndrei Emeltchenko next_tx_seq_offset = __seq_offset(chan, chan->next_tx_seq, 4181836be934SAndrei Emeltchenko chan->expected_ack_seq); 41820a708f8fSGustavo F. Padovan 41830a708f8fSGustavo F. Padovan /* check for invalid req-seq */ 41840a708f8fSGustavo F. Padovan if (req_seq_offset > next_tx_seq_offset) { 41858c1d787bSGustavo F. Padovan l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); 41860a708f8fSGustavo F. Padovan goto drop; 41870a708f8fSGustavo F. Padovan } 41880a708f8fSGustavo F. Padovan 4189793c2f1cSAndrei Emeltchenko if (!__is_sframe(chan, control)) { 41900a708f8fSGustavo F. Padovan if (len < 0) { 41918c1d787bSGustavo F. Padovan l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); 41920a708f8fSGustavo F. Padovan goto drop; 41930a708f8fSGustavo F. Padovan } 41940a708f8fSGustavo F. Padovan 4195525cd185SGustavo F. Padovan l2cap_data_channel_iframe(chan, control, skb); 41960a708f8fSGustavo F. Padovan } else { 41970a708f8fSGustavo F. Padovan if (len != 0) { 41980a708f8fSGustavo F. Padovan BT_ERR("%d", len); 41998c1d787bSGustavo F. Padovan l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); 42000a708f8fSGustavo F. Padovan goto drop; 42010a708f8fSGustavo F. Padovan } 42020a708f8fSGustavo F. Padovan 4203525cd185SGustavo F. Padovan l2cap_data_channel_sframe(chan, control, skb); 42040a708f8fSGustavo F. Padovan } 42050a708f8fSGustavo F. Padovan 42060a708f8fSGustavo F. Padovan return 0; 42070a708f8fSGustavo F. Padovan 42080a708f8fSGustavo F. Padovan drop: 42090a708f8fSGustavo F. Padovan kfree_skb(skb); 42100a708f8fSGustavo F. Padovan return 0; 42110a708f8fSGustavo F. Padovan } 42120a708f8fSGustavo F. Padovan 42130a708f8fSGustavo F. Padovan static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) 42140a708f8fSGustavo F. Padovan { 421548454079SGustavo F. Padovan struct l2cap_chan *chan; 4216bf734843SDavid S. Miller struct sock *sk = NULL; 421788843ab0SAndrei Emeltchenko u32 control; 4218fb45de7dSAndrei Emeltchenko u16 tx_seq; 42190a708f8fSGustavo F. Padovan int len; 42200a708f8fSGustavo F. Padovan 4221baa7e1faSGustavo F. Padovan chan = l2cap_get_chan_by_scid(conn, cid); 422248454079SGustavo F. Padovan if (!chan) { 42230a708f8fSGustavo F. Padovan BT_DBG("unknown cid 0x%4.4x", cid); 42240a708f8fSGustavo F. Padovan goto drop; 42250a708f8fSGustavo F. Padovan } 42260a708f8fSGustavo F. Padovan 422748454079SGustavo F. Padovan sk = chan->sk; 42280a708f8fSGustavo F. Padovan 422949208c9cSGustavo F. Padovan BT_DBG("chan %p, len %d", chan, skb->len); 42300a708f8fSGustavo F. Padovan 423189bc500eSGustavo F. Padovan if (chan->state != BT_CONNECTED) 42320a708f8fSGustavo F. Padovan goto drop; 42330a708f8fSGustavo F. Padovan 42340c1bc5c6SGustavo F. Padovan switch (chan->mode) { 42350a708f8fSGustavo F. Padovan case L2CAP_MODE_BASIC: 42360a708f8fSGustavo F. Padovan /* If socket recv buffers overflows we drop data here 42370a708f8fSGustavo F. Padovan * which is *bad* because L2CAP has to be reliable. 42380a708f8fSGustavo F. Padovan * But we don't have any other choice. L2CAP doesn't 42390a708f8fSGustavo F. Padovan * provide flow control mechanism. */ 42400a708f8fSGustavo F. Padovan 42410c1bc5c6SGustavo F. Padovan if (chan->imtu < skb->len) 42420a708f8fSGustavo F. Padovan goto drop; 42430a708f8fSGustavo F. Padovan 424423070494SGustavo F. Padovan if (!chan->ops->recv(chan->data, skb)) 42450a708f8fSGustavo F. Padovan goto done; 42460a708f8fSGustavo F. Padovan break; 42470a708f8fSGustavo F. Padovan 42480a708f8fSGustavo F. Padovan case L2CAP_MODE_ERTM: 42495ef8cb9eSAndrei Emeltchenko l2cap_ertm_data_rcv(chan, skb); 42500a708f8fSGustavo F. Padovan 42510a708f8fSGustavo F. Padovan goto done; 42520a708f8fSGustavo F. Padovan 42530a708f8fSGustavo F. Padovan case L2CAP_MODE_STREAMING: 425488843ab0SAndrei Emeltchenko control = __get_control(chan, skb->data); 425588843ab0SAndrei Emeltchenko skb_pull(skb, __ctrl_size(chan)); 42560a708f8fSGustavo F. Padovan len = skb->len; 42570a708f8fSGustavo F. Padovan 425847d1ec61SGustavo F. Padovan if (l2cap_check_fcs(chan, skb)) 42590a708f8fSGustavo F. Padovan goto drop; 42600a708f8fSGustavo F. Padovan 42617e0ef6eeSAndrei Emeltchenko if (__is_sar_start(chan, control)) 426203a51213SAndrei Emeltchenko len -= L2CAP_SDULEN_SIZE; 42630a708f8fSGustavo F. Padovan 426447d1ec61SGustavo F. Padovan if (chan->fcs == L2CAP_FCS_CRC16) 426503a51213SAndrei Emeltchenko len -= L2CAP_FCS_SIZE; 42660a708f8fSGustavo F. Padovan 4267793c2f1cSAndrei Emeltchenko if (len > chan->mps || len < 0 || __is_sframe(chan, control)) 42680a708f8fSGustavo F. Padovan goto drop; 42690a708f8fSGustavo F. Padovan 4270fb45de7dSAndrei Emeltchenko tx_seq = __get_txseq(chan, control); 42710a708f8fSGustavo F. Padovan 427284084a31SMat Martineau if (chan->expected_tx_seq != tx_seq) { 427384084a31SMat Martineau /* Frame(s) missing - must discard partial SDU */ 427484084a31SMat Martineau kfree_skb(chan->sdu); 427584084a31SMat Martineau chan->sdu = NULL; 427684084a31SMat Martineau chan->sdu_last_frag = NULL; 427784084a31SMat Martineau chan->sdu_len = 0; 427884084a31SMat Martineau 427984084a31SMat Martineau /* TODO: Notify userland of missing data */ 428084084a31SMat Martineau } 428184084a31SMat Martineau 4282836be934SAndrei Emeltchenko chan->expected_tx_seq = __next_seq(chan, tx_seq); 42830a708f8fSGustavo F. Padovan 428484084a31SMat Martineau if (l2cap_reassemble_sdu(chan, skb, control) == -EMSGSIZE) 428584084a31SMat Martineau l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); 42860a708f8fSGustavo F. Padovan 42870a708f8fSGustavo F. Padovan goto done; 42880a708f8fSGustavo F. Padovan 42890a708f8fSGustavo F. Padovan default: 42900c1bc5c6SGustavo F. Padovan BT_DBG("chan %p: bad mode 0x%2.2x", chan, chan->mode); 42910a708f8fSGustavo F. Padovan break; 42920a708f8fSGustavo F. Padovan } 42930a708f8fSGustavo F. Padovan 42940a708f8fSGustavo F. Padovan drop: 42950a708f8fSGustavo F. Padovan kfree_skb(skb); 42960a708f8fSGustavo F. Padovan 42970a708f8fSGustavo F. Padovan done: 42980a708f8fSGustavo F. Padovan if (sk) 4299aa2ac881SGustavo F. Padovan release_sock(sk); 43000a708f8fSGustavo F. Padovan 43010a708f8fSGustavo F. Padovan return 0; 43020a708f8fSGustavo F. Padovan } 43030a708f8fSGustavo F. Padovan 43040a708f8fSGustavo F. Padovan static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) 43050a708f8fSGustavo F. Padovan { 43066dcae1eaSDavid S. Miller struct sock *sk = NULL; 430723691d75SGustavo F. Padovan struct l2cap_chan *chan; 43080a708f8fSGustavo F. Padovan 430923691d75SGustavo F. Padovan chan = l2cap_global_chan_by_psm(0, psm, conn->src); 431023691d75SGustavo F. Padovan if (!chan) 43110a708f8fSGustavo F. Padovan goto drop; 43120a708f8fSGustavo F. Padovan 431323691d75SGustavo F. Padovan sk = chan->sk; 431423691d75SGustavo F. Padovan 4315aa2ac881SGustavo F. Padovan lock_sock(sk); 43160a708f8fSGustavo F. Padovan 43170a708f8fSGustavo F. Padovan BT_DBG("sk %p, len %d", sk, skb->len); 43180a708f8fSGustavo F. Padovan 431989bc500eSGustavo F. Padovan if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) 43200a708f8fSGustavo F. Padovan goto drop; 43210a708f8fSGustavo F. Padovan 4322e13e21dcSVinicius Costa Gomes if (chan->imtu < skb->len) 43230a708f8fSGustavo F. Padovan goto drop; 43240a708f8fSGustavo F. Padovan 432523070494SGustavo F. Padovan if (!chan->ops->recv(chan->data, skb)) 43260a708f8fSGustavo F. Padovan goto done; 43270a708f8fSGustavo F. Padovan 43280a708f8fSGustavo F. Padovan drop: 43290a708f8fSGustavo F. Padovan kfree_skb(skb); 43300a708f8fSGustavo F. Padovan 43310a708f8fSGustavo F. Padovan done: 43320a708f8fSGustavo F. Padovan if (sk) 4333aa2ac881SGustavo F. Padovan release_sock(sk); 43340a708f8fSGustavo F. Padovan return 0; 43350a708f8fSGustavo F. Padovan } 43360a708f8fSGustavo F. Padovan 43379f69bda6SGustavo F. Padovan static inline int l2cap_att_channel(struct l2cap_conn *conn, __le16 cid, struct sk_buff *skb) 43389f69bda6SGustavo F. Padovan { 43396dcae1eaSDavid S. Miller struct sock *sk = NULL; 434023691d75SGustavo F. Padovan struct l2cap_chan *chan; 43419f69bda6SGustavo F. Padovan 434223691d75SGustavo F. Padovan chan = l2cap_global_chan_by_scid(0, cid, conn->src); 434323691d75SGustavo F. Padovan if (!chan) 43449f69bda6SGustavo F. Padovan goto drop; 43459f69bda6SGustavo F. Padovan 434623691d75SGustavo F. Padovan sk = chan->sk; 434723691d75SGustavo F. Padovan 4348aa2ac881SGustavo F. Padovan lock_sock(sk); 43499f69bda6SGustavo F. Padovan 43509f69bda6SGustavo F. Padovan BT_DBG("sk %p, len %d", sk, skb->len); 43519f69bda6SGustavo F. Padovan 435289bc500eSGustavo F. Padovan if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) 43539f69bda6SGustavo F. Padovan goto drop; 43549f69bda6SGustavo F. Padovan 4355e13e21dcSVinicius Costa Gomes if (chan->imtu < skb->len) 43569f69bda6SGustavo F. Padovan goto drop; 43579f69bda6SGustavo F. Padovan 435823070494SGustavo F. Padovan if (!chan->ops->recv(chan->data, skb)) 43599f69bda6SGustavo F. Padovan goto done; 43609f69bda6SGustavo F. Padovan 43619f69bda6SGustavo F. Padovan drop: 43629f69bda6SGustavo F. Padovan kfree_skb(skb); 43639f69bda6SGustavo F. Padovan 43649f69bda6SGustavo F. Padovan done: 43659f69bda6SGustavo F. Padovan if (sk) 4366aa2ac881SGustavo F. Padovan release_sock(sk); 43679f69bda6SGustavo F. Padovan return 0; 43689f69bda6SGustavo F. Padovan } 43699f69bda6SGustavo F. Padovan 43700a708f8fSGustavo F. Padovan static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) 43710a708f8fSGustavo F. Padovan { 43720a708f8fSGustavo F. Padovan struct l2cap_hdr *lh = (void *) skb->data; 43730a708f8fSGustavo F. Padovan u16 cid, len; 43740a708f8fSGustavo F. Padovan __le16 psm; 43750a708f8fSGustavo F. Padovan 43760a708f8fSGustavo F. Padovan skb_pull(skb, L2CAP_HDR_SIZE); 43770a708f8fSGustavo F. Padovan cid = __le16_to_cpu(lh->cid); 43780a708f8fSGustavo F. Padovan len = __le16_to_cpu(lh->len); 43790a708f8fSGustavo F. Padovan 43800a708f8fSGustavo F. Padovan if (len != skb->len) { 43810a708f8fSGustavo F. Padovan kfree_skb(skb); 43820a708f8fSGustavo F. Padovan return; 43830a708f8fSGustavo F. Padovan } 43840a708f8fSGustavo F. Padovan 43850a708f8fSGustavo F. Padovan BT_DBG("len %d, cid 0x%4.4x", len, cid); 43860a708f8fSGustavo F. Padovan 43870a708f8fSGustavo F. Padovan switch (cid) { 43883300d9a9SClaudio Takahasi case L2CAP_CID_LE_SIGNALING: 43890a708f8fSGustavo F. Padovan case L2CAP_CID_SIGNALING: 43900a708f8fSGustavo F. Padovan l2cap_sig_channel(conn, skb); 43910a708f8fSGustavo F. Padovan break; 43920a708f8fSGustavo F. Padovan 43930a708f8fSGustavo F. Padovan case L2CAP_CID_CONN_LESS: 43940a708f8fSGustavo F. Padovan psm = get_unaligned_le16(skb->data); 43950a708f8fSGustavo F. Padovan skb_pull(skb, 2); 43960a708f8fSGustavo F. Padovan l2cap_conless_channel(conn, psm, skb); 43970a708f8fSGustavo F. Padovan break; 43980a708f8fSGustavo F. Padovan 43999f69bda6SGustavo F. Padovan case L2CAP_CID_LE_DATA: 44009f69bda6SGustavo F. Padovan l2cap_att_channel(conn, cid, skb); 44019f69bda6SGustavo F. Padovan break; 44029f69bda6SGustavo F. Padovan 4403b501d6a1SAnderson Briglia case L2CAP_CID_SMP: 4404b501d6a1SAnderson Briglia if (smp_sig_channel(conn, skb)) 4405b501d6a1SAnderson Briglia l2cap_conn_del(conn->hcon, EACCES); 4406b501d6a1SAnderson Briglia break; 4407b501d6a1SAnderson Briglia 44080a708f8fSGustavo F. Padovan default: 44090a708f8fSGustavo F. Padovan l2cap_data_channel(conn, cid, skb); 44100a708f8fSGustavo F. Padovan break; 44110a708f8fSGustavo F. Padovan } 44120a708f8fSGustavo F. Padovan } 44130a708f8fSGustavo F. Padovan 44140a708f8fSGustavo F. Padovan /* ---- L2CAP interface with lower layer (HCI) ---- */ 44150a708f8fSGustavo F. Padovan 4416686ebf28SUlisses Furquim int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr) 44170a708f8fSGustavo F. Padovan { 44180a708f8fSGustavo F. Padovan int exact = 0, lm1 = 0, lm2 = 0; 441923691d75SGustavo F. Padovan struct l2cap_chan *c; 44200a708f8fSGustavo F. Padovan 44210a708f8fSGustavo F. Padovan BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); 44220a708f8fSGustavo F. Padovan 44230a708f8fSGustavo F. Padovan /* Find listening sockets and check their link_mode */ 442423691d75SGustavo F. Padovan read_lock(&chan_list_lock); 442523691d75SGustavo F. Padovan list_for_each_entry(c, &chan_list, global_l) { 442623691d75SGustavo F. Padovan struct sock *sk = c->sk; 44274343478fSGustavo F. Padovan 442889bc500eSGustavo F. Padovan if (c->state != BT_LISTEN) 44290a708f8fSGustavo F. Padovan continue; 44300a708f8fSGustavo F. Padovan 44310a708f8fSGustavo F. Padovan if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { 44320a708f8fSGustavo F. Padovan lm1 |= HCI_LM_ACCEPT; 443343bd0f32SAndrei Emeltchenko if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) 44340a708f8fSGustavo F. Padovan lm1 |= HCI_LM_MASTER; 44350a708f8fSGustavo F. Padovan exact++; 44360a708f8fSGustavo F. Padovan } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { 44370a708f8fSGustavo F. Padovan lm2 |= HCI_LM_ACCEPT; 443843bd0f32SAndrei Emeltchenko if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) 44390a708f8fSGustavo F. Padovan lm2 |= HCI_LM_MASTER; 44400a708f8fSGustavo F. Padovan } 44410a708f8fSGustavo F. Padovan } 444223691d75SGustavo F. Padovan read_unlock(&chan_list_lock); 44430a708f8fSGustavo F. Padovan 44440a708f8fSGustavo F. Padovan return exact ? lm1 : lm2; 44450a708f8fSGustavo F. Padovan } 44460a708f8fSGustavo F. Padovan 4447686ebf28SUlisses Furquim int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) 44480a708f8fSGustavo F. Padovan { 44490a708f8fSGustavo F. Padovan struct l2cap_conn *conn; 44500a708f8fSGustavo F. Padovan 44510a708f8fSGustavo F. Padovan BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); 44520a708f8fSGustavo F. Padovan 44530a708f8fSGustavo F. Padovan if (!status) { 44540a708f8fSGustavo F. Padovan conn = l2cap_conn_add(hcon, status); 44550a708f8fSGustavo F. Padovan if (conn) 44560a708f8fSGustavo F. Padovan l2cap_conn_ready(conn); 44570a708f8fSGustavo F. Padovan } else 4458e175072fSJoe Perches l2cap_conn_del(hcon, bt_to_errno(status)); 44590a708f8fSGustavo F. Padovan 44600a708f8fSGustavo F. Padovan return 0; 44610a708f8fSGustavo F. Padovan } 44620a708f8fSGustavo F. Padovan 4463686ebf28SUlisses Furquim int l2cap_disconn_ind(struct hci_conn *hcon) 44640a708f8fSGustavo F. Padovan { 44650a708f8fSGustavo F. Padovan struct l2cap_conn *conn = hcon->l2cap_data; 44660a708f8fSGustavo F. Padovan 44670a708f8fSGustavo F. Padovan BT_DBG("hcon %p", hcon); 44680a708f8fSGustavo F. Padovan 4469686ebf28SUlisses Furquim if (!conn) 44709f5a0d7bSAndrei Emeltchenko return HCI_ERROR_REMOTE_USER_TERM; 44710a708f8fSGustavo F. Padovan return conn->disc_reason; 44720a708f8fSGustavo F. Padovan } 44730a708f8fSGustavo F. Padovan 4474686ebf28SUlisses Furquim int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) 44750a708f8fSGustavo F. Padovan { 44760a708f8fSGustavo F. Padovan BT_DBG("hcon %p reason %d", hcon, reason); 44770a708f8fSGustavo F. Padovan 4478e175072fSJoe Perches l2cap_conn_del(hcon, bt_to_errno(reason)); 44790a708f8fSGustavo F. Padovan return 0; 44800a708f8fSGustavo F. Padovan } 44810a708f8fSGustavo F. Padovan 44824343478fSGustavo F. Padovan static inline void l2cap_check_encryption(struct l2cap_chan *chan, u8 encrypt) 44830a708f8fSGustavo F. Padovan { 4484715ec005SGustavo F. Padovan if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) 44850a708f8fSGustavo F. Padovan return; 44860a708f8fSGustavo F. Padovan 44870a708f8fSGustavo F. Padovan if (encrypt == 0x00) { 44884343478fSGustavo F. Padovan if (chan->sec_level == BT_SECURITY_MEDIUM) { 4489c9b66675SGustavo F. Padovan __clear_chan_timer(chan); 4490b83ddfe2SAndrzej Kaczmarek __set_chan_timer(chan, 4491b83ddfe2SAndrzej Kaczmarek msecs_to_jiffies(L2CAP_ENC_TIMEOUT)); 44924343478fSGustavo F. Padovan } else if (chan->sec_level == BT_SECURITY_HIGH) 44930f852724SGustavo F. Padovan l2cap_chan_close(chan, ECONNREFUSED); 44940a708f8fSGustavo F. Padovan } else { 44954343478fSGustavo F. Padovan if (chan->sec_level == BT_SECURITY_MEDIUM) 4496c9b66675SGustavo F. Padovan __clear_chan_timer(chan); 44970a708f8fSGustavo F. Padovan } 44980a708f8fSGustavo F. Padovan } 44990a708f8fSGustavo F. Padovan 4500686ebf28SUlisses Furquim int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) 45010a708f8fSGustavo F. Padovan { 45020a708f8fSGustavo F. Padovan struct l2cap_conn *conn = hcon->l2cap_data; 450348454079SGustavo F. Padovan struct l2cap_chan *chan; 45040a708f8fSGustavo F. Padovan 45050a708f8fSGustavo F. Padovan if (!conn) 45060a708f8fSGustavo F. Padovan return 0; 45070a708f8fSGustavo F. Padovan 45080a708f8fSGustavo F. Padovan BT_DBG("conn %p", conn); 45090a708f8fSGustavo F. Padovan 4510160dc6acSVinicius Costa Gomes if (hcon->type == LE_LINK) { 4511160dc6acSVinicius Costa Gomes smp_distribute_keys(conn, 0); 451217cd3f37SUlisses Furquim cancel_delayed_work(&conn->security_timer); 4513160dc6acSVinicius Costa Gomes } 4514160dc6acSVinicius Costa Gomes 45153d57dc68SGustavo F. Padovan rcu_read_lock(); 45160a708f8fSGustavo F. Padovan 45173d57dc68SGustavo F. Padovan list_for_each_entry_rcu(chan, &conn->chan_l, list) { 451848454079SGustavo F. Padovan struct sock *sk = chan->sk; 4519baa7e1faSGustavo F. Padovan 45200a708f8fSGustavo F. Padovan bh_lock_sock(sk); 45210a708f8fSGustavo F. Padovan 4522f1cb9af5SVinicius Costa Gomes BT_DBG("chan->scid %d", chan->scid); 4523f1cb9af5SVinicius Costa Gomes 4524f1cb9af5SVinicius Costa Gomes if (chan->scid == L2CAP_CID_LE_DATA) { 4525f1cb9af5SVinicius Costa Gomes if (!status && encrypt) { 4526f1cb9af5SVinicius Costa Gomes chan->sec_level = hcon->sec_level; 4527f1cb9af5SVinicius Costa Gomes l2cap_chan_ready(sk); 4528f1cb9af5SVinicius Costa Gomes } 4529f1cb9af5SVinicius Costa Gomes 4530f1cb9af5SVinicius Costa Gomes bh_unlock_sock(sk); 4531f1cb9af5SVinicius Costa Gomes continue; 4532f1cb9af5SVinicius Costa Gomes } 4533f1cb9af5SVinicius Costa Gomes 4534c1360a1cSGustavo F. Padovan if (test_bit(CONF_CONNECT_PEND, &chan->conf_state)) { 45350a708f8fSGustavo F. Padovan bh_unlock_sock(sk); 45360a708f8fSGustavo F. Padovan continue; 45370a708f8fSGustavo F. Padovan } 45380a708f8fSGustavo F. Padovan 453989bc500eSGustavo F. Padovan if (!status && (chan->state == BT_CONNECTED || 454089bc500eSGustavo F. Padovan chan->state == BT_CONFIG)) { 45414343478fSGustavo F. Padovan l2cap_check_encryption(chan, encrypt); 45420a708f8fSGustavo F. Padovan bh_unlock_sock(sk); 45430a708f8fSGustavo F. Padovan continue; 45440a708f8fSGustavo F. Padovan } 45450a708f8fSGustavo F. Padovan 454689bc500eSGustavo F. Padovan if (chan->state == BT_CONNECT) { 45470a708f8fSGustavo F. Padovan if (!status) { 45480a708f8fSGustavo F. Padovan struct l2cap_conn_req req; 4549fe4128e0SGustavo F. Padovan req.scid = cpu_to_le16(chan->scid); 4550fe4128e0SGustavo F. Padovan req.psm = chan->psm; 45510a708f8fSGustavo F. Padovan 4552fc7f8a7eSGustavo F. Padovan chan->ident = l2cap_get_ident(conn); 4553c1360a1cSGustavo F. Padovan set_bit(CONF_CONNECT_PEND, &chan->conf_state); 45540a708f8fSGustavo F. Padovan 4555fc7f8a7eSGustavo F. Padovan l2cap_send_cmd(conn, chan->ident, 45560a708f8fSGustavo F. Padovan L2CAP_CONN_REQ, sizeof(req), &req); 45570a708f8fSGustavo F. Padovan } else { 4558c9b66675SGustavo F. Padovan __clear_chan_timer(chan); 4559b83ddfe2SAndrzej Kaczmarek __set_chan_timer(chan, 4560b83ddfe2SAndrzej Kaczmarek msecs_to_jiffies(L2CAP_DISC_TIMEOUT)); 45610a708f8fSGustavo F. Padovan } 456289bc500eSGustavo F. Padovan } else if (chan->state == BT_CONNECT2) { 45630a708f8fSGustavo F. Padovan struct l2cap_conn_rsp rsp; 4564df3c3931SJohan Hedberg __u16 res, stat; 45650a708f8fSGustavo F. Padovan 45660a708f8fSGustavo F. Padovan if (!status) { 4567df3c3931SJohan Hedberg if (bt_sk(sk)->defer_setup) { 4568df3c3931SJohan Hedberg struct sock *parent = bt_sk(sk)->parent; 4569df3c3931SJohan Hedberg res = L2CAP_CR_PEND; 4570df3c3931SJohan Hedberg stat = L2CAP_CS_AUTHOR_PEND; 457105e9a2f6SIlia Kolomisnky if (parent) 4572df3c3931SJohan Hedberg parent->sk_data_ready(parent, 0); 4573df3c3931SJohan Hedberg } else { 457489bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_CONFIG); 4575df3c3931SJohan Hedberg res = L2CAP_CR_SUCCESS; 4576df3c3931SJohan Hedberg stat = L2CAP_CS_NO_INFO; 4577df3c3931SJohan Hedberg } 45780a708f8fSGustavo F. Padovan } else { 457989bc500eSGustavo F. Padovan l2cap_state_change(chan, BT_DISCONN); 4580b83ddfe2SAndrzej Kaczmarek __set_chan_timer(chan, 4581b83ddfe2SAndrzej Kaczmarek msecs_to_jiffies(L2CAP_DISC_TIMEOUT)); 4582df3c3931SJohan Hedberg res = L2CAP_CR_SEC_BLOCK; 4583df3c3931SJohan Hedberg stat = L2CAP_CS_NO_INFO; 45840a708f8fSGustavo F. Padovan } 45850a708f8fSGustavo F. Padovan 4586fe4128e0SGustavo F. Padovan rsp.scid = cpu_to_le16(chan->dcid); 4587fe4128e0SGustavo F. Padovan rsp.dcid = cpu_to_le16(chan->scid); 4588df3c3931SJohan Hedberg rsp.result = cpu_to_le16(res); 4589df3c3931SJohan Hedberg rsp.status = cpu_to_le16(stat); 4590fc7f8a7eSGustavo F. Padovan l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, 4591fc7f8a7eSGustavo F. Padovan sizeof(rsp), &rsp); 45920a708f8fSGustavo F. Padovan } 45930a708f8fSGustavo F. Padovan 45940a708f8fSGustavo F. Padovan bh_unlock_sock(sk); 45950a708f8fSGustavo F. Padovan } 45960a708f8fSGustavo F. Padovan 45973d57dc68SGustavo F. Padovan rcu_read_unlock(); 45980a708f8fSGustavo F. Padovan 45990a708f8fSGustavo F. Padovan return 0; 46000a708f8fSGustavo F. Padovan } 46010a708f8fSGustavo F. Padovan 4602686ebf28SUlisses Furquim int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) 46030a708f8fSGustavo F. Padovan { 46040a708f8fSGustavo F. Padovan struct l2cap_conn *conn = hcon->l2cap_data; 46050a708f8fSGustavo F. Padovan 46060a708f8fSGustavo F. Padovan if (!conn) 46070a708f8fSGustavo F. Padovan conn = l2cap_conn_add(hcon, 0); 46080a708f8fSGustavo F. Padovan 46090a708f8fSGustavo F. Padovan if (!conn) 46100a708f8fSGustavo F. Padovan goto drop; 46110a708f8fSGustavo F. Padovan 46120a708f8fSGustavo F. Padovan BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); 46130a708f8fSGustavo F. Padovan 46140a708f8fSGustavo F. Padovan if (!(flags & ACL_CONT)) { 46150a708f8fSGustavo F. Padovan struct l2cap_hdr *hdr; 461648454079SGustavo F. Padovan struct l2cap_chan *chan; 46170a708f8fSGustavo F. Padovan u16 cid; 46180a708f8fSGustavo F. Padovan int len; 46190a708f8fSGustavo F. Padovan 46200a708f8fSGustavo F. Padovan if (conn->rx_len) { 46210a708f8fSGustavo F. Padovan BT_ERR("Unexpected start frame (len %d)", skb->len); 46220a708f8fSGustavo F. Padovan kfree_skb(conn->rx_skb); 46230a708f8fSGustavo F. Padovan conn->rx_skb = NULL; 46240a708f8fSGustavo F. Padovan conn->rx_len = 0; 46250a708f8fSGustavo F. Padovan l2cap_conn_unreliable(conn, ECOMM); 46260a708f8fSGustavo F. Padovan } 46270a708f8fSGustavo F. Padovan 46280a708f8fSGustavo F. Padovan /* Start fragment always begin with Basic L2CAP header */ 46290a708f8fSGustavo F. Padovan if (skb->len < L2CAP_HDR_SIZE) { 46300a708f8fSGustavo F. Padovan BT_ERR("Frame is too short (len %d)", skb->len); 46310a708f8fSGustavo F. Padovan l2cap_conn_unreliable(conn, ECOMM); 46320a708f8fSGustavo F. Padovan goto drop; 46330a708f8fSGustavo F. Padovan } 46340a708f8fSGustavo F. Padovan 46350a708f8fSGustavo F. Padovan hdr = (struct l2cap_hdr *) skb->data; 46360a708f8fSGustavo F. Padovan len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; 46370a708f8fSGustavo F. Padovan cid = __le16_to_cpu(hdr->cid); 46380a708f8fSGustavo F. Padovan 46390a708f8fSGustavo F. Padovan if (len == skb->len) { 46400a708f8fSGustavo F. Padovan /* Complete frame received */ 46410a708f8fSGustavo F. Padovan l2cap_recv_frame(conn, skb); 46420a708f8fSGustavo F. Padovan return 0; 46430a708f8fSGustavo F. Padovan } 46440a708f8fSGustavo F. Padovan 46450a708f8fSGustavo F. Padovan BT_DBG("Start: total len %d, frag len %d", len, skb->len); 46460a708f8fSGustavo F. Padovan 46470a708f8fSGustavo F. Padovan if (skb->len > len) { 46480a708f8fSGustavo F. Padovan BT_ERR("Frame is too long (len %d, expected len %d)", 46490a708f8fSGustavo F. Padovan skb->len, len); 46500a708f8fSGustavo F. Padovan l2cap_conn_unreliable(conn, ECOMM); 46510a708f8fSGustavo F. Padovan goto drop; 46520a708f8fSGustavo F. Padovan } 46530a708f8fSGustavo F. Padovan 4654baa7e1faSGustavo F. Padovan chan = l2cap_get_chan_by_scid(conn, cid); 46550a708f8fSGustavo F. Padovan 465648454079SGustavo F. Padovan if (chan && chan->sk) { 465748454079SGustavo F. Padovan struct sock *sk = chan->sk; 465848454079SGustavo F. Padovan 46590c1bc5c6SGustavo F. Padovan if (chan->imtu < len - L2CAP_HDR_SIZE) { 466048454079SGustavo F. Padovan BT_ERR("Frame exceeding recv MTU (len %d, " 466148454079SGustavo F. Padovan "MTU %d)", len, 46620c1bc5c6SGustavo F. Padovan chan->imtu); 4663aa2ac881SGustavo F. Padovan release_sock(sk); 46640a708f8fSGustavo F. Padovan l2cap_conn_unreliable(conn, ECOMM); 46650a708f8fSGustavo F. Padovan goto drop; 46660a708f8fSGustavo F. Padovan } 4667aa2ac881SGustavo F. Padovan release_sock(sk); 466848454079SGustavo F. Padovan } 46690a708f8fSGustavo F. Padovan 46700a708f8fSGustavo F. Padovan /* Allocate skb for the complete frame (with header) */ 46710a708f8fSGustavo F. Padovan conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); 46720a708f8fSGustavo F. Padovan if (!conn->rx_skb) 46730a708f8fSGustavo F. Padovan goto drop; 46740a708f8fSGustavo F. Padovan 46750a708f8fSGustavo F. Padovan skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), 46760a708f8fSGustavo F. Padovan skb->len); 46770a708f8fSGustavo F. Padovan conn->rx_len = len - skb->len; 46780a708f8fSGustavo F. Padovan } else { 46790a708f8fSGustavo F. Padovan BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); 46800a708f8fSGustavo F. Padovan 46810a708f8fSGustavo F. Padovan if (!conn->rx_len) { 46820a708f8fSGustavo F. Padovan BT_ERR("Unexpected continuation frame (len %d)", skb->len); 46830a708f8fSGustavo F. Padovan l2cap_conn_unreliable(conn, ECOMM); 46840a708f8fSGustavo F. Padovan goto drop; 46850a708f8fSGustavo F. Padovan } 46860a708f8fSGustavo F. Padovan 46870a708f8fSGustavo F. Padovan if (skb->len > conn->rx_len) { 46880a708f8fSGustavo F. Padovan BT_ERR("Fragment is too long (len %d, expected %d)", 46890a708f8fSGustavo F. Padovan skb->len, conn->rx_len); 46900a708f8fSGustavo F. Padovan kfree_skb(conn->rx_skb); 46910a708f8fSGustavo F. Padovan conn->rx_skb = NULL; 46920a708f8fSGustavo F. Padovan conn->rx_len = 0; 46930a708f8fSGustavo F. Padovan l2cap_conn_unreliable(conn, ECOMM); 46940a708f8fSGustavo F. Padovan goto drop; 46950a708f8fSGustavo F. Padovan } 46960a708f8fSGustavo F. Padovan 46970a708f8fSGustavo F. Padovan skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), 46980a708f8fSGustavo F. Padovan skb->len); 46990a708f8fSGustavo F. Padovan conn->rx_len -= skb->len; 47000a708f8fSGustavo F. Padovan 47010a708f8fSGustavo F. Padovan if (!conn->rx_len) { 47020a708f8fSGustavo F. Padovan /* Complete frame received */ 47030a708f8fSGustavo F. Padovan l2cap_recv_frame(conn, conn->rx_skb); 47040a708f8fSGustavo F. Padovan conn->rx_skb = NULL; 47050a708f8fSGustavo F. Padovan } 47060a708f8fSGustavo F. Padovan } 47070a708f8fSGustavo F. Padovan 47080a708f8fSGustavo F. Padovan drop: 47090a708f8fSGustavo F. Padovan kfree_skb(skb); 47100a708f8fSGustavo F. Padovan return 0; 47110a708f8fSGustavo F. Padovan } 47120a708f8fSGustavo F. Padovan 47130a708f8fSGustavo F. Padovan static int l2cap_debugfs_show(struct seq_file *f, void *p) 47140a708f8fSGustavo F. Padovan { 471523691d75SGustavo F. Padovan struct l2cap_chan *c; 47160a708f8fSGustavo F. Padovan 4717333055f2SGustavo F. Padovan read_lock(&chan_list_lock); 47180a708f8fSGustavo F. Padovan 471923691d75SGustavo F. Padovan list_for_each_entry(c, &chan_list, global_l) { 472023691d75SGustavo F. Padovan struct sock *sk = c->sk; 47210a708f8fSGustavo F. Padovan 4722903d343eSGustavo F. Padovan seq_printf(f, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d %d\n", 47230a708f8fSGustavo F. Padovan batostr(&bt_sk(sk)->src), 47240a708f8fSGustavo F. Padovan batostr(&bt_sk(sk)->dst), 472589bc500eSGustavo F. Padovan c->state, __le16_to_cpu(c->psm), 472623691d75SGustavo F. Padovan c->scid, c->dcid, c->imtu, c->omtu, 472723691d75SGustavo F. Padovan c->sec_level, c->mode); 47280a708f8fSGustavo F. Padovan } 47290a708f8fSGustavo F. Padovan 4730333055f2SGustavo F. Padovan read_unlock(&chan_list_lock); 47310a708f8fSGustavo F. Padovan 47320a708f8fSGustavo F. Padovan return 0; 47330a708f8fSGustavo F. Padovan } 47340a708f8fSGustavo F. Padovan 47350a708f8fSGustavo F. Padovan static int l2cap_debugfs_open(struct inode *inode, struct file *file) 47360a708f8fSGustavo F. Padovan { 47370a708f8fSGustavo F. Padovan return single_open(file, l2cap_debugfs_show, inode->i_private); 47380a708f8fSGustavo F. Padovan } 47390a708f8fSGustavo F. Padovan 47400a708f8fSGustavo F. Padovan static const struct file_operations l2cap_debugfs_fops = { 47410a708f8fSGustavo F. Padovan .open = l2cap_debugfs_open, 47420a708f8fSGustavo F. Padovan .read = seq_read, 47430a708f8fSGustavo F. Padovan .llseek = seq_lseek, 47440a708f8fSGustavo F. Padovan .release = single_release, 47450a708f8fSGustavo F. Padovan }; 47460a708f8fSGustavo F. Padovan 47470a708f8fSGustavo F. Padovan static struct dentry *l2cap_debugfs; 47480a708f8fSGustavo F. Padovan 474964274518SGustavo F. Padovan int __init l2cap_init(void) 47500a708f8fSGustavo F. Padovan { 47510a708f8fSGustavo F. Padovan int err; 47520a708f8fSGustavo F. Padovan 4753bb58f747SGustavo F. Padovan err = l2cap_init_sockets(); 47540a708f8fSGustavo F. Padovan if (err < 0) 47550a708f8fSGustavo F. Padovan return err; 47560a708f8fSGustavo F. Padovan 47570a708f8fSGustavo F. Padovan if (bt_debugfs) { 47580a708f8fSGustavo F. Padovan l2cap_debugfs = debugfs_create_file("l2cap", 0444, 47590a708f8fSGustavo F. Padovan bt_debugfs, NULL, &l2cap_debugfs_fops); 47600a708f8fSGustavo F. Padovan if (!l2cap_debugfs) 47610a708f8fSGustavo F. Padovan BT_ERR("Failed to create L2CAP debug file"); 47620a708f8fSGustavo F. Padovan } 47630a708f8fSGustavo F. Padovan 47640a708f8fSGustavo F. Padovan return 0; 47650a708f8fSGustavo F. Padovan } 47660a708f8fSGustavo F. Padovan 476764274518SGustavo F. Padovan void l2cap_exit(void) 47680a708f8fSGustavo F. Padovan { 47690a708f8fSGustavo F. Padovan debugfs_remove(l2cap_debugfs); 4770bb58f747SGustavo F. Padovan l2cap_cleanup_sockets(); 47710a708f8fSGustavo F. Padovan } 47720a708f8fSGustavo F. Padovan 47730a708f8fSGustavo F. Padovan module_param(disable_ertm, bool, 0644); 47740a708f8fSGustavo F. Padovan MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode"); 4775