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#include <linux/refcount.h> 25 26#ifndef __RFCOMM_H 27#define __RFCOMM_H 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_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 104struct rfcomm_hdr { 105 u8 addr; 106 u8 ctrl; 107 u8 len; /* Actual size can be 2 bytes */ 108} __packed; 109 110struct rfcomm_cmd { 111 u8 addr; 112 u8 ctrl; 113 u8 len; 114 u8 fcs; 115} __packed; 116 117struct rfcomm_mcc { 118 u8 type; 119 u8 len; 120} __packed; 121 122struct 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} __packed; 131 132struct 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} __packed; 141 142struct rfcomm_rls { 143 u8 dlci; 144 u8 status; 145} __packed; 146 147struct rfcomm_msc { 148 u8 dlci; 149 u8 v24_sig; 150} __packed; 151 152/* ---- Core structures, flags etc ---- */ 153 154struct rfcomm_session { 155 struct list_head list; 156 struct socket *sock; 157 struct timer_list timer; 158 unsigned long state; 159 unsigned long flags; 160 int initiator; 161 162 /* Default DLC parameters */ 163 int cfc; 164 uint mtu; 165 166 struct list_head dlcs; 167}; 168 169struct 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 struct mutex lock; 176 unsigned long state; 177 unsigned long flags; 178 refcount_t refcnt; 179 u8 dlci; 180 u8 addr; 181 u8 priority; 182 u8 v24_sig; 183 u8 remote_v24_sig; 184 u8 mscex; 185 u8 out; 186 u8 sec_level; 187 u8 role_switch; 188 u32 defer_setup; 189 190 uint mtu; 191 uint cfc; 192 uint rx_credits; 193 uint tx_credits; 194 195 void *owner; 196 197 void (*data_ready)(struct rfcomm_dlc *d, struct sk_buff *skb); 198 void (*state_change)(struct rfcomm_dlc *d, int err); 199 void (*modem_status)(struct rfcomm_dlc *d, u8 v24_sig); 200}; 201 202/* DLC and session flags */ 203#define RFCOMM_RX_THROTTLED 0 204#define RFCOMM_TX_THROTTLED 1 205#define RFCOMM_TIMED_OUT 2 206#define RFCOMM_MSC_PENDING 3 207#define RFCOMM_SEC_PENDING 4 208#define RFCOMM_AUTH_PENDING 5 209#define RFCOMM_AUTH_ACCEPT 6 210#define RFCOMM_AUTH_REJECT 7 211#define RFCOMM_DEFER_SETUP 8 212#define RFCOMM_ENC_DROP 9 213 214/* Scheduling flags and events */ 215#define RFCOMM_SCHED_WAKEUP 31 216 217/* MSC exchange flags */ 218#define RFCOMM_MSCEX_TX 1 219#define RFCOMM_MSCEX_RX 2 220#define RFCOMM_MSCEX_OK (RFCOMM_MSCEX_TX + RFCOMM_MSCEX_RX) 221 222/* CFC states */ 223#define RFCOMM_CFC_UNKNOWN -1 224#define RFCOMM_CFC_DISABLED 0 225#define RFCOMM_CFC_ENABLED RFCOMM_MAX_CREDITS 226 227/* ---- RFCOMM SEND RPN ---- */ 228int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci, 229 u8 bit_rate, u8 data_bits, u8 stop_bits, 230 u8 parity, u8 flow_ctrl_settings, 231 u8 xon_char, u8 xoff_char, u16 param_mask); 232 233/* ---- RFCOMM DLCs (channels) ---- */ 234struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio); 235void rfcomm_dlc_free(struct rfcomm_dlc *d); 236int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, 237 u8 channel); 238int rfcomm_dlc_close(struct rfcomm_dlc *d, int reason); 239int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb); 240void rfcomm_dlc_send_noerror(struct rfcomm_dlc *d, struct sk_buff *skb); 241int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig); 242int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig); 243void rfcomm_dlc_accept(struct rfcomm_dlc *d); 244struct rfcomm_dlc *rfcomm_dlc_exists(bdaddr_t *src, bdaddr_t *dst, u8 channel); 245 246#define rfcomm_dlc_lock(d) mutex_lock(&d->lock) 247#define rfcomm_dlc_unlock(d) mutex_unlock(&d->lock) 248 249static inline void rfcomm_dlc_hold(struct rfcomm_dlc *d) 250{ 251 refcount_inc(&d->refcnt); 252} 253 254static inline void rfcomm_dlc_put(struct rfcomm_dlc *d) 255{ 256 if (refcount_dec_and_test(&d->refcnt)) 257 rfcomm_dlc_free(d); 258} 259 260void __rfcomm_dlc_throttle(struct rfcomm_dlc *d); 261void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d); 262 263static inline void rfcomm_dlc_throttle(struct rfcomm_dlc *d) 264{ 265 if (!test_and_set_bit(RFCOMM_RX_THROTTLED, &d->flags)) 266 __rfcomm_dlc_throttle(d); 267} 268 269static inline void rfcomm_dlc_unthrottle(struct rfcomm_dlc *d) 270{ 271 if (test_and_clear_bit(RFCOMM_RX_THROTTLED, &d->flags)) 272 __rfcomm_dlc_unthrottle(d); 273} 274 275/* ---- RFCOMM sessions ---- */ 276void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, 277 bdaddr_t *dst); 278 279/* ---- RFCOMM sockets ---- */ 280struct sockaddr_rc { 281 sa_family_t rc_family; 282 bdaddr_t rc_bdaddr; 283 u8 rc_channel; 284}; 285 286#define RFCOMM_CONNINFO 0x02 287struct rfcomm_conninfo { 288 __u16 hci_handle; 289 __u8 dev_class[3]; 290}; 291 292#define RFCOMM_LM 0x03 293#define RFCOMM_LM_MASTER 0x0001 294#define RFCOMM_LM_AUTH 0x0002 295#define RFCOMM_LM_ENCRYPT 0x0004 296#define RFCOMM_LM_TRUSTED 0x0008 297#define RFCOMM_LM_RELIABLE 0x0010 298#define RFCOMM_LM_SECURE 0x0020 299#define RFCOMM_LM_FIPS 0x0040 300 301#define rfcomm_pi(sk) ((struct rfcomm_pinfo *) sk) 302 303struct rfcomm_pinfo { 304 struct bt_sock bt; 305 bdaddr_t src; 306 bdaddr_t dst; 307 struct rfcomm_dlc *dlc; 308 u8 channel; 309 u8 sec_level; 310 u8 role_switch; 311}; 312 313int rfcomm_init_sockets(void); 314void rfcomm_cleanup_sockets(void); 315 316int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, 317 struct rfcomm_dlc **d); 318 319/* ---- RFCOMM TTY ---- */ 320#define RFCOMM_MAX_DEV 256 321 322#define RFCOMMCREATEDEV _IOW('R', 200, int) 323#define RFCOMMRELEASEDEV _IOW('R', 201, int) 324#define RFCOMMGETDEVLIST _IOR('R', 210, int) 325#define RFCOMMGETDEVINFO _IOR('R', 211, int) 326#define RFCOMMSTEALDLC _IOW('R', 220, int) 327 328/* rfcomm_dev.flags bit definitions */ 329#define RFCOMM_REUSE_DLC 0 330#define RFCOMM_RELEASE_ONHUP 1 331#define RFCOMM_HANGUP_NOW 2 332#define RFCOMM_TTY_ATTACHED 3 333#define RFCOMM_DEFUNCT_BIT4 4 /* don't reuse this bit - userspace visible */ 334 335/* rfcomm_dev.status bit definitions */ 336#define RFCOMM_DEV_RELEASED 0 337#define RFCOMM_TTY_OWNED 1 338 339struct rfcomm_dev_req { 340 s16 dev_id; 341 u32 flags; 342 bdaddr_t src; 343 bdaddr_t dst; 344 u8 channel; 345}; 346 347struct rfcomm_dev_info { 348 s16 id; 349 u32 flags; 350 u16 state; 351 bdaddr_t src; 352 bdaddr_t dst; 353 u8 channel; 354}; 355 356struct rfcomm_dev_list_req { 357 u16 dev_num; 358 struct rfcomm_dev_info dev_info[]; 359}; 360 361int rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg); 362 363#ifdef CONFIG_BT_RFCOMM_TTY 364int rfcomm_init_ttys(void); 365void rfcomm_cleanup_ttys(void); 366#else 367static inline int rfcomm_init_ttys(void) 368{ 369 return 0; 370} 371static inline void rfcomm_cleanup_ttys(void) 372{ 373} 374#endif 375#endif /* __RFCOMM_H */ 376