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 } __packed; 110 111 struct rfcomm_cmd { 112 u8 addr; 113 u8 ctrl; 114 u8 len; 115 u8 fcs; 116 } __packed; 117 118 struct rfcomm_mcc { 119 u8 type; 120 u8 len; 121 } __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 } __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 } __packed; 142 143 struct rfcomm_rls { 144 u8 dlci; 145 u8 status; 146 } __packed; 147 148 struct rfcomm_msc { 149 u8 dlci; 150 u8 v24_sig; 151 } __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 int initiator; 162 163 /* Default DLC parameters */ 164 int cfc; 165 uint mtu; 166 167 struct list_head dlcs; 168 }; 169 170 struct rfcomm_dlc { 171 struct list_head list; 172 struct rfcomm_session *session; 173 struct sk_buff_head tx_queue; 174 struct timer_list timer; 175 176 spinlock_t lock; 177 unsigned long state; 178 unsigned long flags; 179 atomic_t refcnt; 180 u8 dlci; 181 u8 addr; 182 u8 priority; 183 u8 v24_sig; 184 u8 remote_v24_sig; 185 u8 mscex; 186 u8 out; 187 u8 sec_level; 188 u8 role_switch; 189 u32 defer_setup; 190 191 uint mtu; 192 uint cfc; 193 uint rx_credits; 194 uint tx_credits; 195 196 void *owner; 197 198 void (*data_ready)(struct rfcomm_dlc *d, struct sk_buff *skb); 199 void (*state_change)(struct rfcomm_dlc *d, int err); 200 void (*modem_status)(struct rfcomm_dlc *d, u8 v24_sig); 201 }; 202 203 /* DLC and session flags */ 204 #define RFCOMM_RX_THROTTLED 0 205 #define RFCOMM_TX_THROTTLED 1 206 #define RFCOMM_TIMED_OUT 2 207 #define RFCOMM_MSC_PENDING 3 208 #define RFCOMM_SEC_PENDING 4 209 #define RFCOMM_AUTH_PENDING 5 210 #define RFCOMM_AUTH_ACCEPT 6 211 #define RFCOMM_AUTH_REJECT 7 212 #define RFCOMM_DEFER_SETUP 8 213 #define RFCOMM_ENC_DROP 9 214 215 /* Scheduling flags and events */ 216 #define RFCOMM_SCHED_WAKEUP 31 217 218 /* MSC exchange flags */ 219 #define RFCOMM_MSCEX_TX 1 220 #define RFCOMM_MSCEX_RX 2 221 #define RFCOMM_MSCEX_OK (RFCOMM_MSCEX_TX + RFCOMM_MSCEX_RX) 222 223 /* CFC states */ 224 #define RFCOMM_CFC_UNKNOWN -1 225 #define RFCOMM_CFC_DISABLED 0 226 #define RFCOMM_CFC_ENABLED RFCOMM_MAX_CREDITS 227 228 /* ---- RFCOMM SEND RPN ---- */ 229 int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci, 230 u8 bit_rate, u8 data_bits, u8 stop_bits, 231 u8 parity, u8 flow_ctrl_settings, 232 u8 xon_char, u8 xoff_char, u16 param_mask); 233 234 /* ---- RFCOMM DLCs (channels) ---- */ 235 struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio); 236 void rfcomm_dlc_free(struct rfcomm_dlc *d); 237 int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, 238 u8 channel); 239 int rfcomm_dlc_close(struct rfcomm_dlc *d, int reason); 240 int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb); 241 int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig); 242 int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig); 243 void rfcomm_dlc_accept(struct rfcomm_dlc *d); 244 245 #define rfcomm_dlc_lock(d) spin_lock(&d->lock) 246 #define rfcomm_dlc_unlock(d) spin_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 #define RFCOMM_REUSE_DLC 0 328 #define RFCOMM_RELEASE_ONHUP 1 329 #define RFCOMM_HANGUP_NOW 2 330 #define RFCOMM_TTY_ATTACHED 3 331 #define RFCOMM_TTY_RELEASED 4 332 333 struct rfcomm_dev_req { 334 s16 dev_id; 335 u32 flags; 336 bdaddr_t src; 337 bdaddr_t dst; 338 u8 channel; 339 }; 340 341 struct rfcomm_dev_info { 342 s16 id; 343 u32 flags; 344 u16 state; 345 bdaddr_t src; 346 bdaddr_t dst; 347 u8 channel; 348 }; 349 350 struct rfcomm_dev_list_req { 351 u16 dev_num; 352 struct rfcomm_dev_info dev_info[0]; 353 }; 354 355 int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg); 356 357 #ifdef CONFIG_BT_RFCOMM_TTY 358 int rfcomm_init_ttys(void); 359 void rfcomm_cleanup_ttys(void); 360 #else 361 static inline int rfcomm_init_ttys(void) 362 { 363 return 0; 364 } 365 static inline void rfcomm_cleanup_ttys(void) 366 { 367 } 368 #endif 369 #endif /* __RFCOMM_H */ 370