1 /* 2 BlueZ - Bluetooth protocol stack for Linux 3 Copyright (C) 2000-2001 Qualcomm Incorporated 4 Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> 5 6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License version 2 as 10 published by the Free Software Foundation; 11 12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 20 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 23 SOFTWARE IS DISCLAIMED. 24 */ 25 26 #ifndef __L2CAP_H 27 #define __L2CAP_H 28 29 /* L2CAP defaults */ 30 #define L2CAP_DEFAULT_MTU 672 31 #define L2CAP_DEFAULT_MIN_MTU 48 32 #define L2CAP_DEFAULT_FLUSH_TO 0xffff 33 #define L2CAP_DEFAULT_TX_WINDOW 63 34 #define L2CAP_DEFAULT_MAX_TX 3 35 #define L2CAP_DEFAULT_RETRANS_TO 1000 /* 1 second */ 36 #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ 37 #define L2CAP_DEFAULT_MAX_PDU_SIZE 672 38 #define L2CAP_DEFAULT_ACK_TO 200 39 #define L2CAP_LOCAL_BUSY_TRIES 12 40 41 #define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */ 42 #define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */ 43 44 /* L2CAP socket address */ 45 struct sockaddr_l2 { 46 sa_family_t l2_family; 47 __le16 l2_psm; 48 bdaddr_t l2_bdaddr; 49 __le16 l2_cid; 50 }; 51 52 /* L2CAP socket options */ 53 #define L2CAP_OPTIONS 0x01 54 struct l2cap_options { 55 __u16 omtu; 56 __u16 imtu; 57 __u16 flush_to; 58 __u8 mode; 59 __u8 fcs; 60 __u8 max_tx; 61 __u16 txwin_size; 62 }; 63 64 #define L2CAP_CONNINFO 0x02 65 struct l2cap_conninfo { 66 __u16 hci_handle; 67 __u8 dev_class[3]; 68 }; 69 70 #define L2CAP_LM 0x03 71 #define L2CAP_LM_MASTER 0x0001 72 #define L2CAP_LM_AUTH 0x0002 73 #define L2CAP_LM_ENCRYPT 0x0004 74 #define L2CAP_LM_TRUSTED 0x0008 75 #define L2CAP_LM_RELIABLE 0x0010 76 #define L2CAP_LM_SECURE 0x0020 77 78 /* L2CAP command codes */ 79 #define L2CAP_COMMAND_REJ 0x01 80 #define L2CAP_CONN_REQ 0x02 81 #define L2CAP_CONN_RSP 0x03 82 #define L2CAP_CONF_REQ 0x04 83 #define L2CAP_CONF_RSP 0x05 84 #define L2CAP_DISCONN_REQ 0x06 85 #define L2CAP_DISCONN_RSP 0x07 86 #define L2CAP_ECHO_REQ 0x08 87 #define L2CAP_ECHO_RSP 0x09 88 #define L2CAP_INFO_REQ 0x0a 89 #define L2CAP_INFO_RSP 0x0b 90 91 /* L2CAP feature mask */ 92 #define L2CAP_FEAT_FLOWCTL 0x00000001 93 #define L2CAP_FEAT_RETRANS 0x00000002 94 #define L2CAP_FEAT_ERTM 0x00000008 95 #define L2CAP_FEAT_STREAMING 0x00000010 96 #define L2CAP_FEAT_FCS 0x00000020 97 #define L2CAP_FEAT_FIXED_CHAN 0x00000080 98 99 /* L2CAP checksum option */ 100 #define L2CAP_FCS_NONE 0x00 101 #define L2CAP_FCS_CRC16 0x01 102 103 /* L2CAP Control Field bit masks */ 104 #define L2CAP_CTRL_SAR 0xC000 105 #define L2CAP_CTRL_REQSEQ 0x3F00 106 #define L2CAP_CTRL_TXSEQ 0x007E 107 #define L2CAP_CTRL_RETRANS 0x0080 108 #define L2CAP_CTRL_FINAL 0x0080 109 #define L2CAP_CTRL_POLL 0x0010 110 #define L2CAP_CTRL_SUPERVISE 0x000C 111 #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 112 113 #define L2CAP_CTRL_TXSEQ_SHIFT 1 114 #define L2CAP_CTRL_REQSEQ_SHIFT 8 115 #define L2CAP_CTRL_SAR_SHIFT 14 116 117 /* L2CAP Supervisory Function */ 118 #define L2CAP_SUPER_RCV_READY 0x0000 119 #define L2CAP_SUPER_REJECT 0x0004 120 #define L2CAP_SUPER_RCV_NOT_READY 0x0008 121 #define L2CAP_SUPER_SELECT_REJECT 0x000C 122 123 /* L2CAP Segmentation and Reassembly */ 124 #define L2CAP_SDU_UNSEGMENTED 0x0000 125 #define L2CAP_SDU_START 0x4000 126 #define L2CAP_SDU_END 0x8000 127 #define L2CAP_SDU_CONTINUE 0xC000 128 129 /* L2CAP structures */ 130 struct l2cap_hdr { 131 __le16 len; 132 __le16 cid; 133 } __attribute__ ((packed)); 134 #define L2CAP_HDR_SIZE 4 135 136 struct l2cap_cmd_hdr { 137 __u8 code; 138 __u8 ident; 139 __le16 len; 140 } __attribute__ ((packed)); 141 #define L2CAP_CMD_HDR_SIZE 4 142 143 struct l2cap_cmd_rej { 144 __le16 reason; 145 } __attribute__ ((packed)); 146 147 struct l2cap_conn_req { 148 __le16 psm; 149 __le16 scid; 150 } __attribute__ ((packed)); 151 152 struct l2cap_conn_rsp { 153 __le16 dcid; 154 __le16 scid; 155 __le16 result; 156 __le16 status; 157 } __attribute__ ((packed)); 158 159 /* channel indentifier */ 160 #define L2CAP_CID_SIGNALING 0x0001 161 #define L2CAP_CID_CONN_LESS 0x0002 162 #define L2CAP_CID_DYN_START 0x0040 163 #define L2CAP_CID_DYN_END 0xffff 164 165 /* connect result */ 166 #define L2CAP_CR_SUCCESS 0x0000 167 #define L2CAP_CR_PEND 0x0001 168 #define L2CAP_CR_BAD_PSM 0x0002 169 #define L2CAP_CR_SEC_BLOCK 0x0003 170 #define L2CAP_CR_NO_MEM 0x0004 171 172 /* connect status */ 173 #define L2CAP_CS_NO_INFO 0x0000 174 #define L2CAP_CS_AUTHEN_PEND 0x0001 175 #define L2CAP_CS_AUTHOR_PEND 0x0002 176 177 struct l2cap_conf_req { 178 __le16 dcid; 179 __le16 flags; 180 __u8 data[0]; 181 } __attribute__ ((packed)); 182 183 struct l2cap_conf_rsp { 184 __le16 scid; 185 __le16 flags; 186 __le16 result; 187 __u8 data[0]; 188 } __attribute__ ((packed)); 189 190 #define L2CAP_CONF_SUCCESS 0x0000 191 #define L2CAP_CONF_UNACCEPT 0x0001 192 #define L2CAP_CONF_REJECT 0x0002 193 #define L2CAP_CONF_UNKNOWN 0x0003 194 195 struct l2cap_conf_opt { 196 __u8 type; 197 __u8 len; 198 __u8 val[0]; 199 } __attribute__ ((packed)); 200 #define L2CAP_CONF_OPT_SIZE 2 201 202 #define L2CAP_CONF_HINT 0x80 203 #define L2CAP_CONF_MASK 0x7f 204 205 #define L2CAP_CONF_MTU 0x01 206 #define L2CAP_CONF_FLUSH_TO 0x02 207 #define L2CAP_CONF_QOS 0x03 208 #define L2CAP_CONF_RFC 0x04 209 #define L2CAP_CONF_FCS 0x05 210 211 #define L2CAP_CONF_MAX_SIZE 22 212 213 struct l2cap_conf_rfc { 214 __u8 mode; 215 __u8 txwin_size; 216 __u8 max_transmit; 217 __le16 retrans_timeout; 218 __le16 monitor_timeout; 219 __le16 max_pdu_size; 220 } __attribute__ ((packed)); 221 222 #define L2CAP_MODE_BASIC 0x00 223 #define L2CAP_MODE_RETRANS 0x01 224 #define L2CAP_MODE_FLOWCTL 0x02 225 #define L2CAP_MODE_ERTM 0x03 226 #define L2CAP_MODE_STREAMING 0x04 227 228 struct l2cap_disconn_req { 229 __le16 dcid; 230 __le16 scid; 231 } __attribute__ ((packed)); 232 233 struct l2cap_disconn_rsp { 234 __le16 dcid; 235 __le16 scid; 236 } __attribute__ ((packed)); 237 238 struct l2cap_info_req { 239 __le16 type; 240 } __attribute__ ((packed)); 241 242 struct l2cap_info_rsp { 243 __le16 type; 244 __le16 result; 245 __u8 data[0]; 246 } __attribute__ ((packed)); 247 248 /* info type */ 249 #define L2CAP_IT_CL_MTU 0x0001 250 #define L2CAP_IT_FEAT_MASK 0x0002 251 #define L2CAP_IT_FIXED_CHAN 0x0003 252 253 /* info result */ 254 #define L2CAP_IR_SUCCESS 0x0000 255 #define L2CAP_IR_NOTSUPP 0x0001 256 257 /* ----- L2CAP connections ----- */ 258 struct l2cap_chan_list { 259 struct sock *head; 260 rwlock_t lock; 261 long num; 262 }; 263 264 struct l2cap_conn { 265 struct hci_conn *hcon; 266 267 bdaddr_t *dst; 268 bdaddr_t *src; 269 270 unsigned int mtu; 271 272 __u32 feat_mask; 273 274 __u8 info_state; 275 __u8 info_ident; 276 277 struct timer_list info_timer; 278 279 spinlock_t lock; 280 281 struct sk_buff *rx_skb; 282 __u32 rx_len; 283 __u8 rx_ident; 284 __u8 tx_ident; 285 286 __u8 disc_reason; 287 288 struct l2cap_chan_list chan_list; 289 }; 290 291 struct sock_del_list { 292 struct sock *sk; 293 struct list_head list; 294 }; 295 296 #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 297 #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 298 #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 299 300 /* ----- L2CAP channel and socket info ----- */ 301 #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 302 #define TX_QUEUE(sk) (&l2cap_pi(sk)->tx_queue) 303 #define SREJ_QUEUE(sk) (&l2cap_pi(sk)->srej_queue) 304 #define BUSY_QUEUE(sk) (&l2cap_pi(sk)->busy_queue) 305 #define SREJ_LIST(sk) (&l2cap_pi(sk)->srej_l.list) 306 307 struct srej_list { 308 __u8 tx_seq; 309 struct list_head list; 310 }; 311 312 struct l2cap_pinfo { 313 struct bt_sock bt; 314 __le16 psm; 315 __u16 dcid; 316 __u16 scid; 317 318 __u16 imtu; 319 __u16 omtu; 320 __u16 flush_to; 321 __u8 mode; 322 __u8 num_conf_req; 323 __u8 num_conf_rsp; 324 325 __u8 fcs; 326 __u8 sec_level; 327 __u8 role_switch; 328 __u8 force_reliable; 329 330 __u8 conf_req[64]; 331 __u8 conf_len; 332 __u8 conf_state; 333 __u16 conn_state; 334 335 __u8 next_tx_seq; 336 __u8 expected_ack_seq; 337 __u8 expected_tx_seq; 338 __u8 buffer_seq; 339 __u8 buffer_seq_srej; 340 __u8 srej_save_reqseq; 341 __u8 frames_sent; 342 __u8 unacked_frames; 343 __u8 retry_count; 344 __u8 num_acked; 345 __u16 sdu_len; 346 __u16 partial_sdu_len; 347 struct sk_buff *sdu; 348 349 __u8 ident; 350 351 __u8 tx_win; 352 __u8 max_tx; 353 __u8 remote_tx_win; 354 __u8 remote_max_tx; 355 __u16 retrans_timeout; 356 __u16 monitor_timeout; 357 __u16 remote_mps; 358 __u16 mps; 359 360 __le16 sport; 361 362 struct timer_list retrans_timer; 363 struct timer_list monitor_timer; 364 struct timer_list ack_timer; 365 struct sk_buff_head tx_queue; 366 struct sk_buff_head srej_queue; 367 struct sk_buff_head busy_queue; 368 struct work_struct busy_work; 369 struct srej_list srej_l; 370 struct l2cap_conn *conn; 371 struct sock *next_c; 372 struct sock *prev_c; 373 }; 374 375 #define L2CAP_CONF_REQ_SENT 0x01 376 #define L2CAP_CONF_INPUT_DONE 0x02 377 #define L2CAP_CONF_OUTPUT_DONE 0x04 378 #define L2CAP_CONF_MTU_DONE 0x08 379 #define L2CAP_CONF_MODE_DONE 0x10 380 #define L2CAP_CONF_CONNECT_PEND 0x20 381 #define L2CAP_CONF_NO_FCS_RECV 0x40 382 #define L2CAP_CONF_STATE2_DEVICE 0x80 383 384 #define L2CAP_CONF_MAX_CONF_REQ 2 385 #define L2CAP_CONF_MAX_CONF_RSP 2 386 387 #define L2CAP_CONN_SAR_SDU 0x0001 388 #define L2CAP_CONN_SREJ_SENT 0x0002 389 #define L2CAP_CONN_WAIT_F 0x0004 390 #define L2CAP_CONN_SREJ_ACT 0x0008 391 #define L2CAP_CONN_SEND_PBIT 0x0010 392 #define L2CAP_CONN_REMOTE_BUSY 0x0020 393 #define L2CAP_CONN_LOCAL_BUSY 0x0040 394 #define L2CAP_CONN_REJ_ACT 0x0080 395 #define L2CAP_CONN_SEND_FBIT 0x0100 396 #define L2CAP_CONN_RNR_SENT 0x0200 397 #define L2CAP_CONN_SAR_RETRY 0x0400 398 399 #define __mod_retrans_timer() mod_timer(&l2cap_pi(sk)->retrans_timer, \ 400 jiffies + msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO)); 401 #define __mod_monitor_timer() mod_timer(&l2cap_pi(sk)->monitor_timer, \ 402 jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO)); 403 #define __mod_ack_timer() mod_timer(&l2cap_pi(sk)->ack_timer, \ 404 jiffies + msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); 405 406 static inline int l2cap_tx_window_full(struct sock *sk) 407 { 408 struct l2cap_pinfo *pi = l2cap_pi(sk); 409 int sub; 410 411 sub = (pi->next_tx_seq - pi->expected_ack_seq) % 64; 412 413 if (sub < 0) 414 sub += 64; 415 416 return (sub == pi->remote_tx_win); 417 } 418 419 #define __get_txseq(ctrl) ((ctrl) & L2CAP_CTRL_TXSEQ) >> 1 420 #define __get_reqseq(ctrl) ((ctrl) & L2CAP_CTRL_REQSEQ) >> 8 421 #define __is_iframe(ctrl) !((ctrl) & L2CAP_CTRL_FRAME_TYPE) 422 #define __is_sframe(ctrl) (ctrl) & L2CAP_CTRL_FRAME_TYPE 423 #define __is_sar_start(ctrl) ((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START 424 425 void l2cap_load(void); 426 427 #endif /* __L2CAP_H */ 428