linux/include/net/bluetooth/rfcomm.h
<<
>>
Prefs
   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
 104struct rfcomm_hdr {
 105        u8 addr;
 106        u8 ctrl;
 107        u8 len;    // Actual size can be 2 bytes
 108} __attribute__ ((packed));
 109
 110struct rfcomm_cmd {
 111        u8 addr;
 112        u8 ctrl;
 113        u8 len;
 114        u8 fcs;
 115} __attribute__ ((packed));
 116
 117struct rfcomm_mcc {
 118        u8 type;
 119        u8 len;
 120} __attribute__ ((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} __attribute__ ((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} __attribute__ ((packed));
 141
 142struct rfcomm_rls {
 143        u8  dlci;
 144        u8  status;
 145} __attribute__ ((packed));
 146
 147struct rfcomm_msc {
 148        u8  dlci;
 149        u8  v24_sig;
 150} __attribute__ ((packed));
 151
 152/* ---- Core structures, flags etc ---- */
 153
 154struct 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
 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        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
 187        u32           link_mode;
 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_AUTH_PENDING 4
 207#define RFCOMM_AUTH_ACCEPT  5
 208#define RFCOMM_AUTH_REJECT  6
 209
 210/* Scheduling flags and events */
 211#define RFCOMM_SCHED_STATE  0
 212#define RFCOMM_SCHED_RX     1
 213#define RFCOMM_SCHED_TX     2
 214#define RFCOMM_SCHED_TIMEO  3
 215#define RFCOMM_SCHED_AUTH   4
 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 ---- */
 229int 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) ---- */
 235struct rfcomm_dlc *rfcomm_dlc_alloc(gfp_t prio);
 236void rfcomm_dlc_free(struct rfcomm_dlc *d);
 237int  rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel);
 238int  rfcomm_dlc_close(struct rfcomm_dlc *d, int reason);
 239int  rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb);
 240int  rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig);
 241int  rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig);
 242
 243#define rfcomm_dlc_lock(d)     spin_lock(&d->lock)
 244#define rfcomm_dlc_unlock(d)   spin_unlock(&d->lock)
 245
 246static inline void rfcomm_dlc_hold(struct rfcomm_dlc *d)
 247{
 248        atomic_inc(&d->refcnt);
 249}
 250
 251static inline void rfcomm_dlc_put(struct rfcomm_dlc *d)
 252{
 253        if (atomic_dec_and_test(&d->refcnt))
 254                rfcomm_dlc_free(d);
 255}
 256
 257extern void __rfcomm_dlc_throttle(struct rfcomm_dlc *d);
 258extern void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d);
 259
 260static inline void rfcomm_dlc_throttle(struct rfcomm_dlc *d)
 261{
 262        if (!test_and_set_bit(RFCOMM_RX_THROTTLED, &d->flags))
 263                __rfcomm_dlc_throttle(d);
 264}
 265
 266static inline void rfcomm_dlc_unthrottle(struct rfcomm_dlc *d)
 267{
 268        if (test_and_clear_bit(RFCOMM_RX_THROTTLED, &d->flags))
 269                __rfcomm_dlc_unthrottle(d);
 270}
 271
 272/* ---- RFCOMM sessions ---- */
 273void   rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst);
 274
 275static inline void rfcomm_session_hold(struct rfcomm_session *s)
 276{
 277        atomic_inc(&s->refcnt);
 278}
 279
 280/* ---- RFCOMM sockets ---- */
 281struct sockaddr_rc {
 282        sa_family_t     rc_family;
 283        bdaddr_t        rc_bdaddr;
 284        u8              rc_channel;
 285};
 286
 287#define RFCOMM_CONNINFO 0x02
 288struct rfcomm_conninfo {
 289        __u16 hci_handle;
 290        __u8  dev_class[3];
 291};
 292
 293#define RFCOMM_LM       0x03
 294#define RFCOMM_LM_MASTER        0x0001
 295#define RFCOMM_LM_AUTH          0x0002
 296#define RFCOMM_LM_ENCRYPT       0x0004
 297#define RFCOMM_LM_TRUSTED       0x0008
 298#define RFCOMM_LM_RELIABLE      0x0010
 299#define RFCOMM_LM_SECURE        0x0020
 300
 301#define rfcomm_pi(sk) ((struct rfcomm_pinfo *) sk)
 302
 303struct rfcomm_pinfo {
 304        struct bt_sock bt;
 305        struct rfcomm_dlc   *dlc;
 306        u8     channel;
 307        u32    link_mode;
 308};
 309
 310int  rfcomm_init_sockets(void);
 311void rfcomm_cleanup_sockets(void);
 312
 313int  rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d);
 314
 315/* ---- RFCOMM TTY ---- */
 316#define RFCOMM_MAX_DEV  256
 317
 318#define RFCOMMCREATEDEV         _IOW('R', 200, int)
 319#define RFCOMMRELEASEDEV        _IOW('R', 201, int)
 320#define RFCOMMGETDEVLIST        _IOR('R', 210, int)
 321#define RFCOMMGETDEVINFO        _IOR('R', 211, int)
 322#define RFCOMMSTEALDLC          _IOW('R', 220, int)
 323
 324#define RFCOMM_REUSE_DLC      0
 325#define RFCOMM_RELEASE_ONHUP  1
 326#define RFCOMM_HANGUP_NOW     2
 327#define RFCOMM_TTY_ATTACHED   3
 328#define RFCOMM_TTY_RELEASED   4
 329
 330struct rfcomm_dev_req {
 331        s16      dev_id;
 332        u32      flags;
 333        bdaddr_t src;
 334        bdaddr_t dst;
 335        u8       channel;
 336        
 337};
 338
 339struct rfcomm_dev_info {
 340        s16      id;
 341        u32      flags;
 342        u16      state;
 343        bdaddr_t src;
 344        bdaddr_t dst;
 345        u8       channel;
 346};
 347
 348struct rfcomm_dev_list_req {
 349        u16      dev_num;
 350        struct   rfcomm_dev_info dev_info[0];
 351};
 352
 353int  rfcomm_dev_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
 354int  rfcomm_init_ttys(void);
 355void rfcomm_cleanup_ttys(void);
 356
 357#endif /* __RFCOMM_H */
 358