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 33 #define RFCOMM_DEFAULT_MTU 127 34 #define RFCOMM_DEFAULT_CREDITS 7 35 36 #define RFCOMM_MAX_L2CAP_MTU 1013 37 #define RFCOMM_MAX_CREDITS 40 38 39 #define RFCOMM_SKB_HEAD_RESERVE 8 40 #define RFCOMM_SKB_TAIL_RESERVE 2 41 #define RFCOMM_SKB_RESERVE (RFCOMM_SKB_HEAD_RESERVE + RFCOMM_SKB_TAIL_RESERVE) 42 43 #define RFCOMM_SABM 0x2f 44 #define RFCOMM_DISC 0x43 45 #define RFCOMM_UA 0x63 46 #define RFCOMM_DM 0x0f 47 #define RFCOMM_UIH 0xef 48 49 #define RFCOMM_TEST 0x08 50 #define RFCOMM_FCON 0x28 51 #define RFCOMM_FCOFF 0x18 52 #define RFCOMM_MSC 0x38 53 #define RFCOMM_RPN 0x24 54 #define RFCOMM_RLS 0x14 55 #define RFCOMM_PN 0x20 56 #define RFCOMM_NSC 0x04 57 58 #define RFCOMM_V24_FC 0x02 59 #define RFCOMM_V24_RTC 0x04 60 #define RFCOMM_V24_RTR 0x08 61 #define RFCOMM_V24_IC 0x40 62 #define RFCOMM_V24_DV 0x80 63 64 #define RFCOMM_RPN_BR_2400 0x0 65 #define RFCOMM_RPN_BR_4800 0x1 66 #define RFCOMM_RPN_BR_7200 0x2 67 #define RFCOMM_RPN_BR_9600 0x3 68 #define RFCOMM_RPN_BR_19200 0x4 69 #define RFCOMM_RPN_BR_38400 0x5 70 #define RFCOMM_RPN_BR_57600 0x6 71 #define RFCOMM_RPN_BR_115200 0x7 72 #define RFCOMM_RPN_BR_230400 0x8 73 74 #define RFCOMM_RPN_DATA_5 0x0 75 #define RFCOMM_RPN_DATA_6 0x1 76 #define RFCOMM_RPN_DATA_7 0x2 77 #define RFCOMM_RPN_DATA_8 0x3 78 79 #define RFCOMM_RPN_STOP_1 0 80 #define RFCOMM_RPN_STOP_15 1 81 82 #define RFCOMM_RPN_PARITY_NONE 0x0 83 #define RFCOMM_RPN_PARITY_ODD 0x1 84 #define RFCOMM_RPN_PARITY_EVEN 0x3 85 #define RFCOMM_RPN_PARITY_MARK 0x5 86 #define RFCOMM_RPN_PARITY_SPACE 0x7 87 88 #define RFCOMM_RPN_FLOW_NONE 0x00 89 90 #define RFCOMM_RPN_XON_CHAR 0x11 91 #define RFCOMM_RPN_XOFF_CHAR 0x13 92 93 #define RFCOMM_RPN_PM_BITRATE 0x0001 94 #define RFCOMM_RPN_PM_DATA 0x0002 95 #define RFCOMM_RPN_PM_STOP 0x0004 96 #define RFCOMM_RPN_PM_PARITY 0x0008 97 #define RFCOMM_RPN_PM_PARITY_TYPE 0x0010 98 #define RFCOMM_RPN_PM_XON 0x0020 99 #define RFCOMM_RPN_PM_XOFF 0x0040 100 #define RFCOMM_RPN_PM_FLOW 0x3F00 101 102 #define RFCOMM_RPN_PM_ALL 0x3F7F 103 104 struct rfcomm_hdr { 105 u8 addr; 106 u8 ctrl; 107 u8 len; // Actual size can be 2 bytes 108 } __attribute__ ((packed)); 109 110 struct rfcomm_cmd { 111 u8 addr; 112 u8 ctrl; 113 u8 len; 114 u8 fcs; 115 } __attribute__ ((packed)); 116 117 struct rfcomm_mcc { 118 u8 type; 119 u8 len; 120 } __attribute__ ((packed)); 121 122 struct rfcomm_pn { 123 u8 dlci; 124 u8 flow_ctrl; 125 u8 priority; 126 u8 ack_timer; 127 __le16 mtu; 128 u8 max_retrans; 129 u8 credits; 130 } __attribute__ ((packed)); 131 132 struct rfcomm_rpn { 133 u8 dlci; 134 u8 bit_rate; 135 u8 line_settings; 136 u8 flow_ctrl; 137 u8 xon_char; 138 u8 xoff_char; 139 __le16 param_mask; 140 } __attribute__ ((packed)); 141 142 struct rfcomm_rls { 143 u8 dlci; 144 u8 status; 145 } __attribute__ ((packed)); 146 147 struct rfcomm_msc { 148 u8 dlci; 149 u8 v24_sig; 150 } __attribute__ ((packed)); 151 152 /* ---- Core structures, flags etc ---- */ 153 154 struct rfcomm_session { 155 struct list_head list; 156 struct socket *sock; 157 unsigned long state; 158 unsigned long flags; 159 atomic_t refcnt; 160 int initiator; 161 162 /* Default DLC parameters */ 163 int cfc; 164 uint mtu; 165 166 struct list_head dlcs; 167 }; 168 169 struct rfcomm_dlc { 170 struct list_head list; 171 struct rfcomm_session *session; 172 struct sk_buff_head tx_queue; 173 struct timer_list timer; 174 175 spinlock_t lock; 176 unsigned long state; 177 unsigned long flags; 178 atomic_t refcnt; 179 u8 dlci; 180 u8 addr; 181 u8 priority; 182 u8 v24_sig; 183 u8 mscex; 184 185 u32 link_mode; 186 187 uint mtu; 188 uint cfc; 189 uint rx_credits; 190 uint tx_credits; 191 192 void *owner; 193 194 void (*data_ready)(struct rfcomm_dlc *d, struct sk_buff *skb); 195 void (*state_change)(struct rfcomm_dlc *d, int err); 196 void (*modem_status)(struct rfcomm_dlc *d, u8 v24_sig); 197 }; 198 199 /* DLC and session flags */ 200 #define RFCOMM_RX_THROTTLED 0 201 #define RFCOMM_TX_THROTTLED 1 202 #define RFCOMM_TIMED_OUT 2 203 #define RFCOMM_MSC_PENDING 3 204 #define RFCOMM_AUTH_PENDING 4 205 #define RFCOMM_AUTH_ACCEPT 5 206 #define RFCOMM_AUTH_REJECT 6 207 208 /* Scheduling flags and events */ 209 #define RFCOMM_SCHED_STATE 0 210 #define RFCOMM_SCHED_RX 1 211 #define RFCOMM_SCHED_TX 2 212 #define RFCOMM_SCHED_TIMEO 3 213 #define RFCOMM_SCHED_AUTH 4 214 #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, u8 channel); 236 int rfcomm_dlc_close(struct rfcomm_dlc *d, int reason); 237 int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb); 238 int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig); 239 int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig); 240 241 #define rfcomm_dlc_lock(d) spin_lock(&d->lock) 242 #define rfcomm_dlc_unlock(d) spin_unlock(&d->lock) 243 244 static inline void rfcomm_dlc_hold(struct rfcomm_dlc *d) 245 { 246 atomic_inc(&d->refcnt); 247 } 248 249 static inline void rfcomm_dlc_put(struct rfcomm_dlc *d) 250 { 251 if (atomic_dec_and_test(&d->refcnt)) 252 rfcomm_dlc_free(d); 253 } 254 255 extern void __rfcomm_dlc_throttle(struct rfcomm_dlc *d); 256 extern void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d); 257 258 static inline void rfcomm_dlc_throttle(struct rfcomm_dlc *d) 259 { 260 if (!test_and_set_bit(RFCOMM_RX_THROTTLED, &d->flags)) 261 __rfcomm_dlc_throttle(d); 262 } 263 264 static inline void rfcomm_dlc_unthrottle(struct rfcomm_dlc *d) 265 { 266 if (test_and_clear_bit(RFCOMM_RX_THROTTLED, &d->flags)) 267 __rfcomm_dlc_unthrottle(d); 268 } 269 270 /* ---- RFCOMM sessions ---- */ 271 void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst); 272 273 static inline void rfcomm_session_hold(struct rfcomm_session *s) 274 { 275 atomic_inc(&s->refcnt); 276 } 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 298 299 #define rfcomm_pi(sk) ((struct rfcomm_pinfo *) sk) 300 301 struct rfcomm_pinfo { 302 struct bt_sock bt; 303 struct rfcomm_dlc *dlc; 304 u8 channel; 305 u32 link_mode; 306 }; 307 308 int rfcomm_init_sockets(void); 309 void rfcomm_cleanup_sockets(void); 310 311 int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d); 312 313 /* ---- RFCOMM TTY ---- */ 314 #define RFCOMM_MAX_DEV 256 315 316 #define RFCOMMCREATEDEV _IOW('R', 200, int) 317 #define RFCOMMRELEASEDEV _IOW('R', 201, int) 318 #define RFCOMMGETDEVLIST _IOR('R', 210, int) 319 #define RFCOMMGETDEVINFO _IOR('R', 211, int) 320 #define RFCOMMSTEALDLC _IOW('R', 220, int) 321 322 #define RFCOMM_REUSE_DLC 0 323 #define RFCOMM_RELEASE_ONHUP 1 324 #define RFCOMM_HANGUP_NOW 2 325 #define RFCOMM_TTY_ATTACHED 3 326 #define RFCOMM_TTY_RELEASED 4 327 328 struct rfcomm_dev_req { 329 s16 dev_id; 330 u32 flags; 331 bdaddr_t src; 332 bdaddr_t dst; 333 u8 channel; 334 335 }; 336 337 struct rfcomm_dev_info { 338 s16 id; 339 u32 flags; 340 u16 state; 341 bdaddr_t src; 342 bdaddr_t dst; 343 u8 channel; 344 }; 345 346 struct rfcomm_dev_list_req { 347 u16 dev_num; 348 struct rfcomm_dev_info dev_info[0]; 349 }; 350 351 int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg); 352 int rfcomm_init_ttys(void); 353 void rfcomm_cleanup_ttys(void); 354 355 #endif /* __RFCOMM_H */ 356