1 /* 2 RFCOMM implementation for Linux Bluetooth stack (BlueZ). 3 Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> 4 Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org> 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License version 2 as 8 published by the Free Software Foundation; 9 10 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 11 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 12 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 13 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY 14 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 15 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 19 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 20 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 21 SOFTWARE IS DISCLAIMED. 22 */ 23 24 #ifndef __RFCOMM_H 25 #define __RFCOMM_H 26 27 #define RFCOMM_PSM 3 28 29 #define RFCOMM_CONN_TIMEOUT (HZ * 30) 30 #define RFCOMM_DISC_TIMEOUT (HZ * 20) 31 #define RFCOMM_AUTH_TIMEOUT (HZ * 25) 32 #define RFCOMM_IDLE_TIMEOUT (HZ * 2) 33 34 #define RFCOMM_DEFAULT_MTU 127 35 #define RFCOMM_DEFAULT_CREDITS 7 36 37 #define RFCOMM_MAX_L2CAP_MTU 1013 38 #define RFCOMM_MAX_CREDITS 40 39 40 #define RFCOMM_SKB_HEAD_RESERVE 8 41 #define RFCOMM_SKB_TAIL_RESERVE 2 42 #define RFCOMM_SKB_RESERVE (RFCOMM_SKB_HEAD_RESERVE + RFCOMM_SKB_TAIL_RESERVE) 43 44 #define RFCOMM_SABM 0x2f 45 #define RFCOMM_DISC 0x43 46 #define RFCOMM_UA 0x63 47 #define RFCOMM_DM 0x0f 48 #define RFCOMM_UIH 0xef 49 50 #define RFCOMM_TEST 0x08 51 #define RFCOMM_FCON 0x28 52 #define RFCOMM_FCOFF 0x18 53 #define RFCOMM_MSC 0x38 54 #define RFCOMM_RPN 0x24 55 #define RFCOMM_RLS 0x14 56 #define RFCOMM_PN 0x20 57 #define RFCOMM_NSC 0x04 58 59 #define RFCOMM_V24_FC 0x02 60 #define RFCOMM_V24_RTC 0x04 61 #define RFCOMM_V24_RTR 0x08 62 #define RFCOMM_V24_IC 0x40 63 #define RFCOMM_V24_DV 0x80 64 65 #define RFCOMM_RPN_BR_2400 0x0 66 #define RFCOMM_RPN_BR_4800 0x1 67 #define RFCOMM_RPN_BR_7200 0x2 68 #define RFCOMM_RPN_BR_9600 0x3 69 #define RFCOMM_RPN_BR_19200 0x4 70 #define RFCOMM_RPN_BR_38400 0x5 71 #define RFCOMM_RPN_BR_57600 0x6 72 #define RFCOMM_RPN_BR_115200 0x7 73 #define RFCOMM_RPN_BR_230400 0x8 74 75 #define RFCOMM_RPN_DATA_5 0x0 76 #define RFCOMM_RPN_DATA_6 0x1 77 #define RFCOMM_RPN_DATA_7 0x2 78 #define RFCOMM_RPN_DATA_8 0x3 79 80 #define RFCOMM_RPN_STOP_1 0 81 #define RFCOMM_RPN_STOP_15 1 82 83 #define RFCOMM_RPN_PARITY_NONE 0x0 84 #define RFCOMM_RPN_PARITY_ODD 0x1 85 #define RFCOMM_RPN_PARITY_EVEN 0x3 86 #define RFCOMM_RPN_PARITY_MARK 0x5 87 #define RFCOMM_RPN_PARITY_SPACE 0x7 88 89 #define RFCOMM_RPN_FLOW_NONE 0x00 90 91 #define RFCOMM_RPN_XON_CHAR 0x11 92 #define RFCOMM_RPN_XOFF_CHAR 0x13 93 94 #define RFCOMM_RPN_PM_BITRATE 0x0001 95 #define RFCOMM_RPN_PM_DATA 0x0002 96 #define RFCOMM_RPN_PM_STOP 0x0004 97 #define RFCOMM_RPN_PM_PARITY 0x0008 98 #define RFCOMM_RPN_PM_PARITY_TYPE 0x0010 99 #define RFCOMM_RPN_PM_XON 0x0020 100 #define RFCOMM_RPN_PM_XOFF 0x0040 101 #define RFCOMM_RPN_PM_FLOW 0x3F00 102 103 #define RFCOMM_RPN_PM_ALL 0x3F7F 104 105 struct rfcomm_hdr { 106 u8 addr; 107 u8 ctrl; 108 u8 len; // Actual size can be 2 bytes 109 } __attribute__ ((packed)); 110 111 struct rfcomm_cmd { 112 u8 addr; 113 u8 ctrl; 114 u8 len; 115 u8 fcs; 116 } __attribute__ ((packed)); 117 118 struct rfcomm_mcc { 119 u8 type; 120 u8 len; 121 } __attribute__ ((packed)); 122 123 struct rfcomm_pn { 124 u8 dlci; 125 u8 flow_ctrl; 126 u8 priority; 127 u8 ack_timer; 128 __le16 mtu; 129 u8 max_retrans; 130 u8 credits; 131 } __attribute__ ((packed)); 132 133 struct rfcomm_rpn { 134 u8 dlci; 135 u8 bit_rate; 136 u8 line_settings; 137 u8 flow_ctrl; 138 u8 xon_char; 139 u8 xoff_char; 140 __le16 param_mask; 141 } __attribute__ ((packed)); 142 143 struct rfcomm_rls { 144 u8 dlci; 145 u8 status; 146 } __attribute__ ((packed)); 147 148 struct rfcomm_msc { 149 u8 dlci; 150 u8 v24_sig; 151 } __attribute__ ((packed)); 152 153 /* ---- Core structures, flags etc ---- */ 154 155 struct rfcomm_session { 156 struct list_head list; 157 struct socket *sock; 158 struct timer_list timer; 159 unsigned long state; 160 unsigned long flags; 161 atomic_t refcnt; 162 int initiator; 163 164 /* Default DLC parameters */ 165 int cfc; 166 uint mtu; 167 168 struct list_head dlcs; 169 }; 170 171 struct rfcomm_dlc { 172 struct list_head list; 173 struct rfcomm_session *session; 174 struct sk_buff_head tx_queue; 175 struct timer_list timer; 176 177 spinlock_t lock; 178 unsigned long state; 179 unsigned long flags; 180 atomic_t refcnt; 181 u8 dlci; 182 u8 addr; 183 u8 priority; 184 u8 v24_sig; 185 u8 remote_v24_sig; 186 u8 mscex; 187 u8 out; 188 u8 sec_level; 189 u8 role_switch; 190 u32 defer_setup; 191 192 uint mtu; 193 uint cfc; 194 uint rx_credits; 195 uint tx_credits; 196 197 void *owner; 198 199 void (*data_ready)(struct rfcomm_dlc *d, struct sk_buff *skb); 200 void (*state_change)(struct rfcomm_dlc *d, int err); 201 void (*modem_status)(struct rfcomm_dlc *d, u8 v24_sig); 202 }; 203 204 /* DLC and session flags */ 205 #define RFCOMM_RX_THROTTLED 0 206 #define RFCOMM_TX_THROTTLED 1 207 #define RFCOMM_TIMED_OUT 2 208 #define RFCOMM_MSC_PENDING 3 209 #define RFCOMM_SEC_PENDING 4 210 #define RFCOMM_AUTH_PENDING 5 211 #define RFCOMM_AUTH_ACCEPT 6 212 #define RFCOMM_AUTH_REJECT 7 213 #define RFCOMM_DEFER_SETUP 8 214 215 /* Scheduling flags and events */ 216 #define RFCOMM_SCHED_STATE 0 217 #define RFCOMM_SCHED_RX 1 218 #define RFCOMM_SCHED_TX 2 219 #define RFCOMM_SCHED_TIMEO 3 220 #define RFCOMM_SCHED_AUTH 4 221 #define RFCOMM_SCHED_WAKEUP 31 222 223 /* MSC exchange flags */ 224 #define RFCOMM_MSCEX_TX 1 225 #define RFCOMM_MSCEX_RX 2 226 #define RFCOMM_MSCEX_OK (RFCOMM_MSCEX_TX + RFCOMM_MSCEX_RX) 227 228 /* CFC states */ 229 #define RFCOMM_CFC_UNKNOWN -1 230 #define RFCOMM_CFC_DISABLED 0 231 #define RFCOMM_CFC_ENABLED RFCOMM_MAX_CREDITS 232 233 /* ---- RFCOMM SEND RPN ---- */ 234 int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci, 235 u8 bit_rate, u8 data_bits, u8 stop_bits, 236 u8 parity, u8 flow_ctrl_settings, 237 u8 xon_char, u8 xoff_char, u16 param_mask); 238 239 /* ---- RFCOMM DLCs (channels) ---- */ 240 struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio); 241 void rfcomm_dlc_free(struct rfcomm_dlc *d); 242 int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel); 243 int rfcomm_dlc_close(struct rfcomm_dlc *d, int reason); 244 int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb); 245 int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig); 246 int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig); 247 void rfcomm_dlc_accept(struct rfcomm_dlc *d); 248 249 #define rfcomm_dlc_lock(d) spin_lock(&d->lock) 250 #define rfcomm_dlc_unlock(d) spin_unlock(&d->lock) 251 252 static inline void rfcomm_dlc_hold(struct rfcomm_dlc *d) 253 { 254 atomic_inc(&d->refcnt); 255 } 256 257 static inline void rfcomm_dlc_put(struct rfcomm_dlc *d) 258 { 259 if (atomic_dec_and_test(&d->refcnt)) 260 rfcomm_dlc_free(d); 261 } 262 263 extern void __rfcomm_dlc_throttle(struct rfcomm_dlc *d); 264 extern void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d); 265 266 static inline void rfcomm_dlc_throttle(struct rfcomm_dlc *d) 267 { 268 if (!test_and_set_bit(RFCOMM_RX_THROTTLED, &d->flags)) 269 __rfcomm_dlc_throttle(d); 270 } 271 272 static inline void rfcomm_dlc_unthrottle(struct rfcomm_dlc *d) 273 { 274 if (test_and_clear_bit(RFCOMM_RX_THROTTLED, &d->flags)) 275 __rfcomm_dlc_unthrottle(d); 276 } 277 278 /* ---- RFCOMM sessions ---- */ 279 void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst); 280 281 static inline void rfcomm_session_hold(struct rfcomm_session *s) 282 { 283 atomic_inc(&s->refcnt); 284 } 285 286 /* ---- RFCOMM sockets ---- */ 287 struct sockaddr_rc { 288 sa_family_t rc_family; 289 bdaddr_t rc_bdaddr; 290 u8 rc_channel; 291 }; 292 293 #define RFCOMM_CONNINFO 0x02 294 struct rfcomm_conninfo { 295 __u16 hci_handle; 296 __u8 dev_class[3]; 297 }; 298 299 #define RFCOMM_LM 0x03 300 #define RFCOMM_LM_MASTER 0x0001 301 #define RFCOMM_LM_AUTH 0x0002 302 #define RFCOMM_LM_ENCRYPT 0x0004 303 #define RFCOMM_LM_TRUSTED 0x0008 304 #define RFCOMM_LM_RELIABLE 0x0010 305 #define RFCOMM_LM_SECURE 0x0020 306 307 #define rfcomm_pi(sk) ((struct rfcomm_pinfo *) sk) 308 309 struct rfcomm_pinfo { 310 struct bt_sock bt; 311 struct rfcomm_dlc *dlc; 312 u8 channel; 313 u8 sec_level; 314 u8 role_switch; 315 }; 316 317 int rfcomm_init_sockets(void); 318 void rfcomm_cleanup_sockets(void); 319 320 int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d); 321 322 /* ---- RFCOMM TTY ---- */ 323 #define RFCOMM_MAX_DEV 256 324 325 #define RFCOMMCREATEDEV _IOW('R', 200, int) 326 #define RFCOMMRELEASEDEV _IOW('R', 201, int) 327 #define RFCOMMGETDEVLIST _IOR('R', 210, int) 328 #define RFCOMMGETDEVINFO _IOR('R', 211, int) 329 #define RFCOMMSTEALDLC _IOW('R', 220, int) 330 331 #define RFCOMM_REUSE_DLC 0 332 #define RFCOMM_RELEASE_ONHUP 1 333 #define RFCOMM_HANGUP_NOW 2 334 #define RFCOMM_TTY_ATTACHED 3 335 #define RFCOMM_TTY_RELEASED 4 336 337 struct rfcomm_dev_req { 338 s16 dev_id; 339 u32 flags; 340 bdaddr_t src; 341 bdaddr_t dst; 342 u8 channel; 343 }; 344 345 struct rfcomm_dev_info { 346 s16 id; 347 u32 flags; 348 u16 state; 349 bdaddr_t src; 350 bdaddr_t dst; 351 u8 channel; 352 }; 353 354 struct rfcomm_dev_list_req { 355 u16 dev_num; 356 struct rfcomm_dev_info dev_info[0]; 357 }; 358 359 int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg); 360 361 #ifdef CONFIG_BT_RFCOMM_TTY 362 int rfcomm_init_ttys(void); 363 void rfcomm_cleanup_ttys(void); 364 #else 365 static inline int rfcomm_init_ttys(void) 366 { 367 return 0; 368 } 369 static inline void rfcomm_cleanup_ttys(void) 370 { 371 } 372 #endif 373 #endif /* __RFCOMM_H */ 374