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_CONN_TIMEOUT (HZ * 30) 28 #define RFCOMM_DISC_TIMEOUT (HZ * 20) 29 #define RFCOMM_AUTH_TIMEOUT (HZ * 25) 30 #define RFCOMM_IDLE_TIMEOUT (HZ * 2) 31 32 #define RFCOMM_DEFAULT_MTU 127 33 #define RFCOMM_DEFAULT_CREDITS 7 34 35 #define RFCOMM_MAX_L2CAP_MTU 1013 36 #define RFCOMM_MAX_CREDITS 40 37 38 #define RFCOMM_SKB_HEAD_RESERVE 8 39 #define RFCOMM_SKB_TAIL_RESERVE 2 40 #define RFCOMM_SKB_RESERVE (RFCOMM_SKB_HEAD_RESERVE + RFCOMM_SKB_TAIL_RESERVE) 41 42 #define RFCOMM_SABM 0x2f 43 #define RFCOMM_DISC 0x43 44 #define RFCOMM_UA 0x63 45 #define RFCOMM_DM 0x0f 46 #define RFCOMM_UIH 0xef 47 48 #define RFCOMM_TEST 0x08 49 #define RFCOMM_FCON 0x28 50 #define RFCOMM_FCOFF 0x18 51 #define RFCOMM_MSC 0x38 52 #define RFCOMM_RPN 0x24 53 #define RFCOMM_RLS 0x14 54 #define RFCOMM_PN 0x20 55 #define RFCOMM_NSC 0x04 56 57 #define RFCOMM_V24_FC 0x02 58 #define RFCOMM_V24_RTC 0x04 59 #define RFCOMM_V24_RTR 0x08 60 #define RFCOMM_V24_IC 0x40 61 #define RFCOMM_V24_DV 0x80 62 63 #define RFCOMM_RPN_BR_2400 0x0 64 #define RFCOMM_RPN_BR_4800 0x1 65 #define RFCOMM_RPN_BR_7200 0x2 66 #define RFCOMM_RPN_BR_9600 0x3 67 #define RFCOMM_RPN_BR_19200 0x4 68 #define RFCOMM_RPN_BR_38400 0x5 69 #define RFCOMM_RPN_BR_57600 0x6 70 #define RFCOMM_RPN_BR_115200 0x7 71 #define RFCOMM_RPN_BR_230400 0x8 72 73 #define RFCOMM_RPN_DATA_5 0x0 74 #define RFCOMM_RPN_DATA_6 0x1 75 #define RFCOMM_RPN_DATA_7 0x2 76 #define RFCOMM_RPN_DATA_8 0x3 77 78 #define RFCOMM_RPN_STOP_1 0 79 #define RFCOMM_RPN_STOP_15 1 80 81 #define RFCOMM_RPN_PARITY_NONE 0x0 82 #define RFCOMM_RPN_PARITY_ODD 0x1 83 #define RFCOMM_RPN_PARITY_EVEN 0x3 84 #define RFCOMM_RPN_PARITY_MARK 0x5 85 #define RFCOMM_RPN_PARITY_SPACE 0x7 86 87 #define RFCOMM_RPN_FLOW_NONE 0x00 88 89 #define RFCOMM_RPN_XON_CHAR 0x11 90 #define RFCOMM_RPN_XOFF_CHAR 0x13 91 92 #define RFCOMM_RPN_PM_BITRATE 0x0001 93 #define RFCOMM_RPN_PM_DATA 0x0002 94 #define RFCOMM_RPN_PM_STOP 0x0004 95 #define RFCOMM_RPN_PM_PARITY 0x0008 96 #define RFCOMM_RPN_PM_PARITY_TYPE 0x0010 97 #define RFCOMM_RPN_PM_XON 0x0020 98 #define RFCOMM_RPN_PM_XOFF 0x0040 99 #define RFCOMM_RPN_PM_FLOW 0x3F00 100 101 #define RFCOMM_RPN_PM_ALL 0x3F7F 102 103 struct rfcomm_hdr { 104 u8 addr; 105 u8 ctrl; 106 u8 len; /* Actual size can be 2 bytes */ 107 } __packed; 108 109 struct rfcomm_cmd { 110 u8 addr; 111 u8 ctrl; 112 u8 len; 113 u8 fcs; 114 } __packed; 115 116 struct rfcomm_mcc { 117 u8 type; 118 u8 len; 119 } __packed; 120 121 struct rfcomm_pn { 122 u8 dlci; 123 u8 flow_ctrl; 124 u8 priority; 125 u8 ack_timer; 126 __le16 mtu; 127 u8 max_retrans; 128 u8 credits; 129 } __packed; 130 131 struct rfcomm_rpn { 132 u8 dlci; 133 u8 bit_rate; 134 u8 line_settings; 135 u8 flow_ctrl; 136 u8 xon_char; 137 u8 xoff_char; 138 __le16 param_mask; 139 } __packed; 140 141 struct rfcomm_rls { 142 u8 dlci; 143 u8 status; 144 } __packed; 145 146 struct rfcomm_msc { 147 u8 dlci; 148 u8 v24_sig; 149 } __packed; 150 151 /* ---- Core structures, flags etc ---- */ 152 153 struct rfcomm_session { 154 struct list_head list; 155 struct socket *sock; 156 struct timer_list timer; 157 unsigned long state; 158 unsigned long flags; 159 int initiator; 160 161 /* Default DLC parameters */ 162 int cfc; 163 uint mtu; 164 165 struct list_head dlcs; 166 }; 167 168 struct rfcomm_dlc { 169 struct list_head list; 170 struct rfcomm_session *session; 171 struct sk_buff_head tx_queue; 172 struct timer_list timer; 173 174 struct mutex lock; 175 unsigned long state; 176 unsigned long flags; 177 atomic_t refcnt; 178 u8 dlci; 179 u8 addr; 180 u8 priority; 181 u8 v24_sig; 182 u8 remote_v24_sig; 183 u8 mscex; 184 u8 out; 185 u8 sec_level; 186 u8 role_switch; 187 u32 defer_setup; 188 189 uint mtu; 190 uint cfc; 191 uint rx_credits; 192 uint tx_credits; 193 194 void *owner; 195 196 void (*data_ready)(struct rfcomm_dlc *d, struct sk_buff *skb); 197 void (*state_change)(struct rfcomm_dlc *d, int err); 198 void (*modem_status)(struct rfcomm_dlc *d, u8 v24_sig); 199 }; 200 201 /* DLC and session flags */ 202 #define RFCOMM_RX_THROTTLED 0 203 #define RFCOMM_TX_THROTTLED 1 204 #define RFCOMM_TIMED_OUT 2 205 #define RFCOMM_MSC_PENDING 3 206 #define RFCOMM_SEC_PENDING 4 207 #define RFCOMM_AUTH_PENDING 5 208 #define RFCOMM_AUTH_ACCEPT 6 209 #define RFCOMM_AUTH_REJECT 7 210 #define RFCOMM_DEFER_SETUP 8 211 #define RFCOMM_ENC_DROP 9 212 213 /* Scheduling flags and events */ 214 #define RFCOMM_SCHED_WAKEUP 31 215 216 /* MSC exchange flags */ 217 #define RFCOMM_MSCEX_TX 1 218 #define RFCOMM_MSCEX_RX 2 219 #define RFCOMM_MSCEX_OK (RFCOMM_MSCEX_TX + RFCOMM_MSCEX_RX) 220 221 /* CFC states */ 222 #define RFCOMM_CFC_UNKNOWN -1 223 #define RFCOMM_CFC_DISABLED 0 224 #define RFCOMM_CFC_ENABLED RFCOMM_MAX_CREDITS 225 226 /* ---- RFCOMM SEND RPN ---- */ 227 int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci, 228 u8 bit_rate, u8 data_bits, u8 stop_bits, 229 u8 parity, u8 flow_ctrl_settings, 230 u8 xon_char, u8 xoff_char, u16 param_mask); 231 232 /* ---- RFCOMM DLCs (channels) ---- */ 233 struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio); 234 void rfcomm_dlc_free(struct rfcomm_dlc *d); 235 int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, 236 u8 channel); 237 int rfcomm_dlc_close(struct rfcomm_dlc *d, int reason); 238 int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb); 239 void rfcomm_dlc_send_noerror(struct rfcomm_dlc *d, struct sk_buff *skb); 240 int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig); 241 int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig); 242 void rfcomm_dlc_accept(struct rfcomm_dlc *d); 243 struct rfcomm_dlc *rfcomm_dlc_exists(bdaddr_t *src, bdaddr_t *dst, u8 channel); 244 245 #define rfcomm_dlc_lock(d) mutex_lock(&d->lock) 246 #define rfcomm_dlc_unlock(d) mutex_unlock(&d->lock) 247 248 static inline void rfcomm_dlc_hold(struct rfcomm_dlc *d) 249 { 250 atomic_inc(&d->refcnt); 251 } 252 253 static inline void rfcomm_dlc_put(struct rfcomm_dlc *d) 254 { 255 if (atomic_dec_and_test(&d->refcnt)) 256 rfcomm_dlc_free(d); 257 } 258 259 void __rfcomm_dlc_throttle(struct rfcomm_dlc *d); 260 void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d); 261 262 static inline void rfcomm_dlc_throttle(struct rfcomm_dlc *d) 263 { 264 if (!test_and_set_bit(RFCOMM_RX_THROTTLED, &d->flags)) 265 __rfcomm_dlc_throttle(d); 266 } 267 268 static inline void rfcomm_dlc_unthrottle(struct rfcomm_dlc *d) 269 { 270 if (test_and_clear_bit(RFCOMM_RX_THROTTLED, &d->flags)) 271 __rfcomm_dlc_unthrottle(d); 272 } 273 274 /* ---- RFCOMM sessions ---- */ 275 void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, 276 bdaddr_t *dst); 277 278 /* ---- RFCOMM sockets ---- */ 279 struct sockaddr_rc { 280 sa_family_t rc_family; 281 bdaddr_t rc_bdaddr; 282 u8 rc_channel; 283 }; 284 285 #define RFCOMM_CONNINFO 0x02 286 struct rfcomm_conninfo { 287 __u16 hci_handle; 288 __u8 dev_class[3]; 289 }; 290 291 #define RFCOMM_LM 0x03 292 #define RFCOMM_LM_MASTER 0x0001 293 #define RFCOMM_LM_AUTH 0x0002 294 #define RFCOMM_LM_ENCRYPT 0x0004 295 #define RFCOMM_LM_TRUSTED 0x0008 296 #define RFCOMM_LM_RELIABLE 0x0010 297 #define RFCOMM_LM_SECURE 0x0020 298 #define RFCOMM_LM_FIPS 0x0040 299 300 #define rfcomm_pi(sk) ((struct rfcomm_pinfo *) sk) 301 302 struct rfcomm_pinfo { 303 struct bt_sock bt; 304 bdaddr_t src; 305 bdaddr_t dst; 306 struct rfcomm_dlc *dlc; 307 u8 channel; 308 u8 sec_level; 309 u8 role_switch; 310 }; 311 312 int rfcomm_init_sockets(void); 313 void rfcomm_cleanup_sockets(void); 314 315 int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, 316 struct rfcomm_dlc **d); 317 318 /* ---- RFCOMM TTY ---- */ 319 #define RFCOMM_MAX_DEV 256 320 321 #define RFCOMMCREATEDEV _IOW('R', 200, int) 322 #define RFCOMMRELEASEDEV _IOW('R', 201, int) 323 #define RFCOMMGETDEVLIST _IOR('R', 210, int) 324 #define RFCOMMGETDEVINFO _IOR('R', 211, int) 325 #define RFCOMMSTEALDLC _IOW('R', 220, int) 326 327 /* rfcomm_dev.flags bit definitions */ 328 #define RFCOMM_REUSE_DLC 0 329 #define RFCOMM_RELEASE_ONHUP 1 330 #define RFCOMM_HANGUP_NOW 2 331 #define RFCOMM_TTY_ATTACHED 3 332 #define RFCOMM_DEFUNCT_BIT4 4 /* don't reuse this bit - userspace visible */ 333 334 /* rfcomm_dev.status bit definitions */ 335 #define RFCOMM_DEV_RELEASED 0 336 #define RFCOMM_TTY_OWNED 1 337 338 struct rfcomm_dev_req { 339 s16 dev_id; 340 u32 flags; 341 bdaddr_t src; 342 bdaddr_t dst; 343 u8 channel; 344 }; 345 346 struct rfcomm_dev_info { 347 s16 id; 348 u32 flags; 349 u16 state; 350 bdaddr_t src; 351 bdaddr_t dst; 352 u8 channel; 353 }; 354 355 struct rfcomm_dev_list_req { 356 u16 dev_num; 357 struct rfcomm_dev_info dev_info[0]; 358 }; 359 360 int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg); 361 362 #ifdef CONFIG_BT_RFCOMM_TTY 363 int rfcomm_init_ttys(void); 364 void rfcomm_cleanup_ttys(void); 365 #else 366 static inline int rfcomm_init_ttys(void) 367 { 368 return 0; 369 } 370 static inline void rfcomm_cleanup_ttys(void) 371 { 372 } 373 #endif 374 #endif /* __RFCOMM_H */ 375