1 /* 2 * Copyright (C) 2011 Intel Corporation. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 enum llcp_state { 19 LLCP_CONNECTED = 1, /* wait_for_packet() wants that */ 20 LLCP_CONNECTING, 21 LLCP_DISCONNECTING, 22 LLCP_CLOSED, 23 LLCP_BOUND, 24 LLCP_LISTEN, 25 }; 26 27 #define LLCP_DEFAULT_LTO 100 28 #define LLCP_DEFAULT_RW 1 29 #define LLCP_DEFAULT_MIU 128 30 31 #define LLCP_MAX_LTO 0xff 32 #define LLCP_MAX_RW 15 33 #define LLCP_MAX_MIUX 0x7ff 34 #define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128) 35 36 #define LLCP_WKS_NUM_SAP 16 37 #define LLCP_SDP_NUM_SAP 16 38 #define LLCP_LOCAL_NUM_SAP 32 39 #define LLCP_LOCAL_SAP_OFFSET (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP) 40 #define LLCP_MAX_SAP (LLCP_WKS_NUM_SAP + LLCP_SDP_NUM_SAP + LLCP_LOCAL_NUM_SAP) 41 #define LLCP_SDP_UNBOUND (LLCP_MAX_SAP + 1) 42 43 struct nfc_llcp_sock; 44 45 struct llcp_sock_list { 46 struct hlist_head head; 47 rwlock_t lock; 48 }; 49 50 struct nfc_llcp_sdp_tlv { 51 u8 *tlv; 52 u8 tlv_len; 53 54 char *uri; 55 u8 tid; 56 u8 sap; 57 58 unsigned long time; 59 60 struct hlist_node node; 61 }; 62 63 struct nfc_llcp_local { 64 struct list_head list; 65 struct nfc_dev *dev; 66 67 struct kref ref; 68 69 struct mutex sdp_lock; 70 71 struct timer_list link_timer; 72 struct sk_buff_head tx_queue; 73 struct work_struct tx_work; 74 struct work_struct rx_work; 75 struct sk_buff *rx_pending; 76 struct work_struct timeout_work; 77 78 u32 target_idx; 79 u8 rf_mode; 80 u8 comm_mode; 81 u8 lto; 82 u8 rw; 83 __be16 miux; 84 unsigned long local_wks; /* Well known services */ 85 unsigned long local_sdp; /* Local services */ 86 unsigned long local_sap; /* Local SAPs, not available for discovery */ 87 atomic_t local_sdp_cnt[LLCP_SDP_NUM_SAP]; 88 89 /* local */ 90 u8 gb[NFC_MAX_GT_LEN]; 91 u8 gb_len; 92 93 /* remote */ 94 u8 remote_gb[NFC_MAX_GT_LEN]; 95 u8 remote_gb_len; 96 97 u8 remote_version; 98 u16 remote_miu; 99 u16 remote_lto; 100 u8 remote_opt; 101 u16 remote_wks; 102 103 struct mutex sdreq_lock; 104 struct hlist_head pending_sdreqs; 105 struct timer_list sdreq_timer; 106 struct work_struct sdreq_timeout_work; 107 u8 sdreq_next_tid; 108 109 /* sockets array */ 110 struct llcp_sock_list sockets; 111 struct llcp_sock_list connecting_sockets; 112 struct llcp_sock_list raw_sockets; 113 }; 114 115 struct nfc_llcp_sock { 116 struct sock sk; 117 struct nfc_dev *dev; 118 struct nfc_llcp_local *local; 119 u32 target_idx; 120 u32 nfc_protocol; 121 122 /* Link parameters */ 123 u8 ssap; 124 u8 dsap; 125 char *service_name; 126 size_t service_name_len; 127 u8 rw; 128 __be16 miux; 129 130 131 /* Remote link parameters */ 132 u8 remote_rw; 133 u16 remote_miu; 134 135 /* Link variables */ 136 u8 send_n; 137 u8 send_ack_n; 138 u8 recv_n; 139 u8 recv_ack_n; 140 141 /* Is the remote peer ready to receive */ 142 u8 remote_ready; 143 144 /* Reserved source SAP */ 145 u8 reserved_ssap; 146 147 struct sk_buff_head tx_queue; 148 struct sk_buff_head tx_pending_queue; 149 150 struct list_head accept_queue; 151 struct sock *parent; 152 }; 153 154 struct nfc_llcp_ui_cb { 155 __u8 dsap; 156 __u8 ssap; 157 }; 158 159 #define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0])) 160 161 #define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk)) 162 #define nfc_llcp_dev(sk) (nfc_llcp_sock((sk))->dev) 163 164 #define LLCP_HEADER_SIZE 2 165 #define LLCP_SEQUENCE_SIZE 1 166 #define LLCP_AGF_PDU_HEADER_SIZE 2 167 168 /* LLCP versions: 1.1 is 1.0 plus SDP */ 169 #define LLCP_VERSION_10 0x10 170 #define LLCP_VERSION_11 0x11 171 172 /* LLCP PDU types */ 173 #define LLCP_PDU_SYMM 0x0 174 #define LLCP_PDU_PAX 0x1 175 #define LLCP_PDU_AGF 0x2 176 #define LLCP_PDU_UI 0x3 177 #define LLCP_PDU_CONNECT 0x4 178 #define LLCP_PDU_DISC 0x5 179 #define LLCP_PDU_CC 0x6 180 #define LLCP_PDU_DM 0x7 181 #define LLCP_PDU_FRMR 0x8 182 #define LLCP_PDU_SNL 0x9 183 #define LLCP_PDU_I 0xc 184 #define LLCP_PDU_RR 0xd 185 #define LLCP_PDU_RNR 0xe 186 187 /* Parameters TLV types */ 188 #define LLCP_TLV_VERSION 0x1 189 #define LLCP_TLV_MIUX 0x2 190 #define LLCP_TLV_WKS 0x3 191 #define LLCP_TLV_LTO 0x4 192 #define LLCP_TLV_RW 0x5 193 #define LLCP_TLV_SN 0x6 194 #define LLCP_TLV_OPT 0x7 195 #define LLCP_TLV_SDREQ 0x8 196 #define LLCP_TLV_SDRES 0x9 197 #define LLCP_TLV_MAX 0xa 198 199 /* Well known LLCP SAP */ 200 #define LLCP_SAP_SDP 0x1 201 #define LLCP_SAP_IP 0x2 202 #define LLCP_SAP_OBEX 0x3 203 #define LLCP_SAP_SNEP 0x4 204 #define LLCP_SAP_MAX 0xff 205 206 /* Disconnection reason code */ 207 #define LLCP_DM_DISC 0x00 208 #define LLCP_DM_NOCONN 0x01 209 #define LLCP_DM_NOBOUND 0x02 210 #define LLCP_DM_REJ 0x03 211 212 213 void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s); 214 void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s); 215 void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock); 216 struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev); 217 struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local); 218 int nfc_llcp_local_put(struct nfc_llcp_local *local); 219 u8 nfc_llcp_get_sdp_ssap(struct nfc_llcp_local *local, 220 struct nfc_llcp_sock *sock); 221 u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local); 222 void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap); 223 int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock); 224 void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local, 225 struct sk_buff *skb, u8 direction); 226 227 /* Sock API */ 228 struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp, int kern); 229 void nfc_llcp_sock_free(struct nfc_llcp_sock *sock); 230 void nfc_llcp_accept_unlink(struct sock *sk); 231 void nfc_llcp_accept_enqueue(struct sock *parent, struct sock *sk); 232 struct sock *nfc_llcp_accept_dequeue(struct sock *sk, struct socket *newsock); 233 234 /* TLV API */ 235 int nfc_llcp_parse_gb_tlv(struct nfc_llcp_local *local, 236 u8 *tlv_array, u16 tlv_array_len); 237 int nfc_llcp_parse_connection_tlv(struct nfc_llcp_sock *sock, 238 u8 *tlv_array, u16 tlv_array_len); 239 240 /* Commands API */ 241 void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); 242 u8 *nfc_llcp_build_tlv(u8 type, u8 *value, u8 value_length, u8 *tlv_length); 243 struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdres_tlv(u8 tid, u8 sap); 244 struct nfc_llcp_sdp_tlv *nfc_llcp_build_sdreq_tlv(u8 tid, char *uri, 245 size_t uri_len); 246 void nfc_llcp_free_sdp_tlv(struct nfc_llcp_sdp_tlv *sdp); 247 void nfc_llcp_free_sdp_tlv_list(struct hlist_head *sdp_head); 248 void nfc_llcp_recv(void *data, struct sk_buff *skb, int err); 249 int nfc_llcp_send_symm(struct nfc_dev *dev); 250 int nfc_llcp_send_connect(struct nfc_llcp_sock *sock); 251 int nfc_llcp_send_cc(struct nfc_llcp_sock *sock); 252 int nfc_llcp_send_snl_sdres(struct nfc_llcp_local *local, 253 struct hlist_head *tlv_list, size_t tlvs_len); 254 int nfc_llcp_send_snl_sdreq(struct nfc_llcp_local *local, 255 struct hlist_head *tlv_list, size_t tlvs_len); 256 int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason); 257 int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock); 258 int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, 259 struct msghdr *msg, size_t len); 260 int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap, 261 struct msghdr *msg, size_t len); 262 int nfc_llcp_send_rr(struct nfc_llcp_sock *sock); 263 264 /* Socket API */ 265 int __init nfc_llcp_sock_init(void); 266 void nfc_llcp_sock_exit(void); 267