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_NUM_TO_ACK (L2CAP_DEFAULT_TX_WINDOW/5) 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 39#define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */ 40#define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */ 41 42/* L2CAP socket address */ 43struct sockaddr_l2 { 44 sa_family_t l2_family; 45 __le16 l2_psm; 46 bdaddr_t l2_bdaddr; 47 __le16 l2_cid; 48}; 49 50/* L2CAP socket options */ 51#define L2CAP_OPTIONS 0x01 52struct l2cap_options { 53 __u16 omtu; 54 __u16 imtu; 55 __u16 flush_to; 56 __u8 mode; 57 __u8 fcs; 58}; 59 60#define L2CAP_CONNINFO 0x02 61struct l2cap_conninfo { 62 __u16 hci_handle; 63 __u8 dev_class[3]; 64}; 65 66#define L2CAP_LM 0x03 67#define L2CAP_LM_MASTER 0x0001 68#define L2CAP_LM_AUTH 0x0002 69#define L2CAP_LM_ENCRYPT 0x0004 70#define L2CAP_LM_TRUSTED 0x0008 71#define L2CAP_LM_RELIABLE 0x0010 72#define L2CAP_LM_SECURE 0x0020 73 74/* L2CAP command codes */ 75#define L2CAP_COMMAND_REJ 0x01 76#define L2CAP_CONN_REQ 0x02 77#define L2CAP_CONN_RSP 0x03 78#define L2CAP_CONF_REQ 0x04 79#define L2CAP_CONF_RSP 0x05 80#define L2CAP_DISCONN_REQ 0x06 81#define L2CAP_DISCONN_RSP 0x07 82#define L2CAP_ECHO_REQ 0x08 83#define L2CAP_ECHO_RSP 0x09 84#define L2CAP_INFO_REQ 0x0a 85#define L2CAP_INFO_RSP 0x0b 86 87/* L2CAP feature mask */ 88#define L2CAP_FEAT_FLOWCTL 0x00000001 89#define L2CAP_FEAT_RETRANS 0x00000002 90#define L2CAP_FEAT_ERTM 0x00000008 91#define L2CAP_FEAT_STREAMING 0x00000010 92#define L2CAP_FEAT_FCS 0x00000020 93#define L2CAP_FEAT_FIXED_CHAN 0x00000080 94 95/* L2CAP checksum option */ 96#define L2CAP_FCS_NONE 0x00 97#define L2CAP_FCS_CRC16 0x01 98 99/* L2CAP Control Field bit masks */ 100#define L2CAP_CTRL_SAR 0xC000 101#define L2CAP_CTRL_REQSEQ 0x3F00 102#define L2CAP_CTRL_TXSEQ 0x007E 103#define L2CAP_CTRL_RETRANS 0x0080 104#define L2CAP_CTRL_FINAL 0x0080 105#define L2CAP_CTRL_POLL 0x0010 106#define L2CAP_CTRL_SUPERVISE 0x000C 107#define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ 108 109#define L2CAP_CTRL_TXSEQ_SHIFT 1 110#define L2CAP_CTRL_REQSEQ_SHIFT 8 111#define L2CAP_CTRL_SAR_SHIFT 14 112 113/* L2CAP Supervisory Function */ 114#define L2CAP_SUPER_RCV_READY 0x0000 115#define L2CAP_SUPER_REJECT 0x0004 116#define L2CAP_SUPER_RCV_NOT_READY 0x0008 117#define L2CAP_SUPER_SELECT_REJECT 0x000C 118 119/* L2CAP Segmentation and Reassembly */ 120#define L2CAP_SDU_UNSEGMENTED 0x0000 121#define L2CAP_SDU_START 0x4000 122#define L2CAP_SDU_END 0x8000 123#define L2CAP_SDU_CONTINUE 0xC000 124 125/* L2CAP structures */ 126struct l2cap_hdr { 127 __le16 len; 128 __le16 cid; 129} __attribute__ ((packed)); 130#define L2CAP_HDR_SIZE 4 131 132struct l2cap_cmd_hdr { 133 __u8 code; 134 __u8 ident; 135 __le16 len; 136} __attribute__ ((packed)); 137#define L2CAP_CMD_HDR_SIZE 4 138 139struct l2cap_cmd_rej { 140 __le16 reason; 141} __attribute__ ((packed)); 142 143struct l2cap_conn_req { 144 __le16 psm; 145 __le16 scid; 146} __attribute__ ((packed)); 147 148struct l2cap_conn_rsp { 149 __le16 dcid; 150 __le16 scid; 151 __le16 result; 152 __le16 status; 153} __attribute__ ((packed)); 154 155/* channel indentifier */ 156#define L2CAP_CID_SIGNALING 0x0001 157#define L2CAP_CID_CONN_LESS 0x0002 158#define L2CAP_CID_DYN_START 0x0040 159#define L2CAP_CID_DYN_END 0xffff 160 161/* connect result */ 162#define L2CAP_CR_SUCCESS 0x0000 163#define L2CAP_CR_PEND 0x0001 164#define L2CAP_CR_BAD_PSM 0x0002 165#define L2CAP_CR_SEC_BLOCK 0x0003 166#define L2CAP_CR_NO_MEM 0x0004 167 168/* connect status */ 169#define L2CAP_CS_NO_INFO 0x0000 170#define L2CAP_CS_AUTHEN_PEND 0x0001 171#define L2CAP_CS_AUTHOR_PEND 0x0002 172 173struct l2cap_conf_req { 174 __le16 dcid; 175 __le16 flags; 176 __u8 data[0]; 177} __attribute__ ((packed)); 178 179struct l2cap_conf_rsp { 180 __le16 scid; 181 __le16 flags; 182 __le16 result; 183 __u8 data[0]; 184} __attribute__ ((packed)); 185 186#define L2CAP_CONF_SUCCESS 0x0000 187#define L2CAP_CONF_UNACCEPT 0x0001 188#define L2CAP_CONF_REJECT 0x0002 189#define L2CAP_CONF_UNKNOWN 0x0003 190 191struct l2cap_conf_opt { 192 __u8 type; 193 __u8 len; 194 __u8 val[0]; 195} __attribute__ ((packed)); 196#define L2CAP_CONF_OPT_SIZE 2 197 198#define L2CAP_CONF_HINT 0x80 199#define L2CAP_CONF_MASK 0x7f 200 201#define L2CAP_CONF_MTU 0x01 202#define L2CAP_CONF_FLUSH_TO 0x02 203#define L2CAP_CONF_QOS 0x03 204#define L2CAP_CONF_RFC 0x04 205#define L2CAP_CONF_FCS 0x05 206 207#define L2CAP_CONF_MAX_SIZE 22 208 209struct l2cap_conf_rfc { 210 __u8 mode; 211 __u8 txwin_size; 212 __u8 max_transmit; 213 __le16 retrans_timeout; 214 __le16 monitor_timeout; 215 __le16 max_pdu_size; 216} __attribute__ ((packed)); 217 218#define L2CAP_MODE_BASIC 0x00 219#define L2CAP_MODE_RETRANS 0x01 220#define L2CAP_MODE_FLOWCTL 0x02 221#define L2CAP_MODE_ERTM 0x03 222#define L2CAP_MODE_STREAMING 0x04 223 224struct l2cap_disconn_req { 225 __le16 dcid; 226 __le16 scid; 227} __attribute__ ((packed)); 228 229struct l2cap_disconn_rsp { 230 __le16 dcid; 231 __le16 scid; 232} __attribute__ ((packed)); 233 234struct l2cap_info_req { 235 __le16 type; 236} __attribute__ ((packed)); 237 238struct l2cap_info_rsp { 239 __le16 type; 240 __le16 result; 241 __u8 data[0]; 242} __attribute__ ((packed)); 243 244/* info type */ 245#define L2CAP_IT_CL_MTU 0x0001 246#define L2CAP_IT_FEAT_MASK 0x0002 247#define L2CAP_IT_FIXED_CHAN 0x0003 248 249/* info result */ 250#define L2CAP_IR_SUCCESS 0x0000 251#define L2CAP_IR_NOTSUPP 0x0001 252 253/* ----- L2CAP connections ----- */ 254struct l2cap_chan_list { 255 struct sock *head; 256 rwlock_t lock; 257 long num; 258}; 259 260struct l2cap_conn { 261 struct hci_conn *hcon; 262 263 bdaddr_t *dst; 264 bdaddr_t *src; 265 266 unsigned int mtu; 267 268 __u32 feat_mask; 269 270 __u8 info_state; 271 __u8 info_ident; 272 273 struct timer_list info_timer; 274 275 spinlock_t lock; 276 277 struct sk_buff *rx_skb; 278 __u32 rx_len; 279 __u8 rx_ident; 280 __u8 tx_ident; 281 282 __u8 disc_reason; 283 284 struct l2cap_chan_list chan_list; 285}; 286 287#define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 288#define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 289#define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 290 291/* ----- L2CAP channel and socket info ----- */ 292#define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) 293#define TX_QUEUE(sk) (&l2cap_pi(sk)->tx_queue) 294#define SREJ_QUEUE(sk) (&l2cap_pi(sk)->srej_queue) 295#define SREJ_LIST(sk) (&l2cap_pi(sk)->srej_l.list) 296 297struct srej_list { 298 __u8 tx_seq; 299 struct list_head list; 300}; 301 302struct l2cap_pinfo { 303 struct bt_sock bt; 304 __le16 psm; 305 __u16 dcid; 306 __u16 scid; 307 308 __u16 imtu; 309 __u16 omtu; 310 __u16 flush_to; 311 __u8 mode; 312 __u8 num_conf_req; 313 __u8 num_conf_rsp; 314 315 __u8 fcs; 316 __u8 sec_level; 317 __u8 role_switch; 318 __u8 force_reliable; 319 320 __u8 conf_req[64]; 321 __u8 conf_len; 322 __u8 conf_state; 323 __u8 conn_state; 324 325 __u8 next_tx_seq; 326 __u8 expected_ack_seq; 327 __u8 expected_tx_seq; 328 __u8 buffer_seq; 329 __u8 buffer_seq_srej; 330 __u8 srej_save_reqseq; 331 __u8 unacked_frames; 332 __u8 retry_count; 333 __u8 num_to_ack; 334 __u16 sdu_len; 335 __u16 partial_sdu_len; 336 struct sk_buff *sdu; 337 338 __u8 ident; 339 340 __u8 remote_tx_win; 341 __u8 remote_max_tx; 342 __u16 retrans_timeout; 343 __u16 monitor_timeout; 344 __u16 max_pdu_size; 345 346 __le16 sport; 347 348 struct timer_list retrans_timer; 349 struct timer_list monitor_timer; 350 struct sk_buff_head tx_queue; 351 struct sk_buff_head srej_queue; 352 struct srej_list srej_l; 353 struct l2cap_conn *conn; 354 struct sock *next_c; 355 struct sock *prev_c; 356}; 357 358#define L2CAP_CONF_REQ_SENT 0x01 359#define L2CAP_CONF_INPUT_DONE 0x02 360#define L2CAP_CONF_OUTPUT_DONE 0x04 361#define L2CAP_CONF_MTU_DONE 0x08 362#define L2CAP_CONF_MODE_DONE 0x10 363#define L2CAP_CONF_CONNECT_PEND 0x20 364#define L2CAP_CONF_NO_FCS_RECV 0x40 365#define L2CAP_CONF_STATE2_DEVICE 0x80 366 367#define L2CAP_CONF_MAX_CONF_REQ 2 368#define L2CAP_CONF_MAX_CONF_RSP 2 369 370#define L2CAP_CONN_SAR_SDU 0x01 371#define L2CAP_CONN_SREJ_SENT 0x02 372#define L2CAP_CONN_WAIT_F 0x04 373#define L2CAP_CONN_SREJ_ACT 0x08 374#define L2CAP_CONN_SEND_PBIT 0x10 375#define L2CAP_CONN_REMOTE_BUSY 0x20 376#define L2CAP_CONN_LOCAL_BUSY 0x40 377#define L2CAP_CONN_REJ_ACT 0x80 378 379#define __mod_retrans_timer() mod_timer(&l2cap_pi(sk)->retrans_timer, \ 380 jiffies + msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO)); 381#define __mod_monitor_timer() mod_timer(&l2cap_pi(sk)->monitor_timer, \ 382 jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO)); 383 384static inline int l2cap_tx_window_full(struct sock *sk) 385{ 386 struct l2cap_pinfo *pi = l2cap_pi(sk); 387 int sub; 388 389 sub = (pi->next_tx_seq - pi->expected_ack_seq) % 64; 390 391 if (sub < 0) 392 sub += 64; 393 394 return (sub == pi->remote_tx_win); 395} 396 397#define __get_txseq(ctrl) ((ctrl) & L2CAP_CTRL_TXSEQ) >> 1 398#define __get_reqseq(ctrl) ((ctrl) & L2CAP_CTRL_REQSEQ) >> 8 399#define __is_iframe(ctrl) !((ctrl) & L2CAP_CTRL_FRAME_TYPE) 400#define __is_sframe(ctrl) (ctrl) & L2CAP_CTRL_FRAME_TYPE 401#define __is_sar_start(ctrl) ((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START 402 403void l2cap_load(void); 404 405#endif /* __L2CAP_H */ 406