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