include/net/bluetooth/rfcomm.h

   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            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
 213 /* Scheduling flags and events */
 214 #define RFCOMM_SCHED_STATE  0
 215 #define RFCOMM_SCHED_RX     1
 216 #define RFCOMM_SCHED_TX     2
 217 #define RFCOMM_SCHED_TIMEO  3
 218 #define RFCOMM_SCHED_AUTH   4
 219 #define RFCOMM_SCHED_WAKEUP 31
 220
 221 /* MSC exchange flags */
 222 #define RFCOMM_MSCEX_TX     1
 223 #define RFCOMM_MSCEX_RX     2
 224 #define RFCOMM_MSCEX_OK     (RFCOMM_MSCEX_TX + RFCOMM_MSCEX_RX)
 225
 226 /* CFC states */
 227 #define RFCOMM_CFC_UNKNOWN  -1
 228 #define RFCOMM_CFC_DISABLED 0
 229 #define RFCOMM_CFC_ENABLED  RFCOMM_MAX_CREDITS
 230
 231 /* ---- RFCOMM SEND RPN ---- */
 232 int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci,
 233                         u8 bit_rate, u8 data_bits, u8 stop_bits,
 234                         u8 parity, u8 flow_ctrl_settings,
 235                         u8 xon_char, u8 xoff_char, u16 param_mask);
 236
 237 /* ---- RFCOMM DLCs (channels) ---- */
 238 struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio);
 239 void rfcomm_dlc_free(struct rfcomm_dlc *d);
 240 int  rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel);
 241 int  rfcomm_dlc_close(struct rfcomm_dlc *d, int reason);
 242 int  rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb);
 243 int  rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig);
 244 int  rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig);
 245 void rfcomm_dlc_accept(struct rfcomm_dlc *d);
 246
 247 #define rfcomm_dlc_lock(d)     spin_lock(&d->lock)
 248 #define rfcomm_dlc_unlock(d)   spin_unlock(&d->lock)
 249
 250 static inline void rfcomm_dlc_hold(struct rfcomm_dlc *d)
 251 {
 252         atomic_inc(&d->refcnt);
 253 }
 254
 255 static inline void rfcomm_dlc_put(struct rfcomm_dlc *d)
 256 {
 257         if (atomic_dec_and_test(&d->refcnt))
 258                 rfcomm_dlc_free(d);
 259 }
 260
 261 extern void __rfcomm_dlc_throttle(struct rfcomm_dlc *d);
 262 extern void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d);
 263
 264 static inline void rfcomm_dlc_throttle(struct rfcomm_dlc *d)
 265 {
 266         if (!test_and_set_bit(RFCOMM_RX_THROTTLED, &d->flags))
 267                 __rfcomm_dlc_throttle(d);
 268 }
 269
 270 static inline void rfcomm_dlc_unthrottle(struct rfcomm_dlc *d)
 271 {
 272         if (test_and_clear_bit(RFCOMM_RX_THROTTLED, &d->flags))
 273                 __rfcomm_dlc_unthrottle(d);
 274 }
 275
 276 /* ---- RFCOMM sessions ---- */
 277 void   rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst);
 278
 279 static inline void rfcomm_session_hold(struct rfcomm_session *s)
 280 {
 281         atomic_inc(&s->refcnt);
 282 }
 283
 284 /* ---- RFCOMM sockets ---- */
 285 struct sockaddr_rc {
 286         sa_family_t     rc_family;
 287         bdaddr_t        rc_bdaddr;
 288         u8              rc_channel;
 289 };
 290
 291 #define RFCOMM_CONNINFO 0x02
 292 struct rfcomm_conninfo {
 293         __u16 hci_handle;
 294         __u8  dev_class[3];
 295 };
 296
 297 #define RFCOMM_LM       0x03
 298 #define RFCOMM_LM_MASTER        0x0001
 299 #define RFCOMM_LM_AUTH          0x0002
 300 #define RFCOMM_LM_ENCRYPT       0x0004
 301 #define RFCOMM_LM_TRUSTED       0x0008
 302 #define RFCOMM_LM_RELIABLE      0x0010
 303 #define RFCOMM_LM_SECURE        0x0020
 304
 305 #define rfcomm_pi(sk) ((struct rfcomm_pinfo *) sk)
 306
 307 struct rfcomm_pinfo {
 308         struct bt_sock bt;
 309         struct rfcomm_dlc   *dlc;
 310         u8     channel;
 311         u8     sec_level;
 312         u8     role_switch;
 313 };
 314
 315 int  rfcomm_init_sockets(void);
 316 void rfcomm_cleanup_sockets(void);
 317
 318 int  rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d);
 319
 320 /* ---- RFCOMM TTY ---- */
 321 #define RFCOMM_MAX_DEV  256
 322
 323 #define RFCOMMCREATEDEV         _IOW('R', 200, int)
 324 #define RFCOMMRELEASEDEV        _IOW('R', 201, int)
 325 #define RFCOMMGETDEVLIST        _IOR('R', 210, int)
 326 #define RFCOMMGETDEVINFO        _IOR('R', 211, int)
 327 #define RFCOMMSTEALDLC          _IOW('R', 220, int)
 328
 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_TTY_RELEASED   4
 334
 335 struct rfcomm_dev_req {
 336         s16      dev_id;
 337         u32      flags;
 338         bdaddr_t src;
 339         bdaddr_t dst;
 340         u8       channel;
 341 };
 342
 343 struct rfcomm_dev_info {
 344         s16      id;
 345         u32      flags;
 346         u16      state;
 347         bdaddr_t src;
 348         bdaddr_t dst;
 349         u8       channel;
 350 };
 351
 352 struct rfcomm_dev_list_req {
 353         u16      dev_num;
 354         struct   rfcomm_dev_info dev_info[0];
 355 };
 356
 357 int  rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
 358 int  rfcomm_init_ttys(void);
 359 void rfcomm_cleanup_ttys(void);
 360
 361 #endif /* __RFCOMM_H */