include/net/bluetooth/bluetooth.h

   1 /*
   2    BlueZ - Bluetooth protocol stack for Linux
   3    Copyright (C) 2000-2001 Qualcomm Incorporated
   4
   5    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License version 2 as
   9    published by the Free Software Foundation;
  10
  11    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  12    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  13    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  14    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  15    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
  16    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  17    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  18    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  19
  20    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  21    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  22    SOFTWARE IS DISCLAIMED.
  23 */
  24
  25 #ifndef __BLUETOOTH_H
  26 #define __BLUETOOTH_H
  27
  28 #include <linux/poll.h>
  29 #include <net/sock.h>
  30 #include <linux/seq_file.h>
  31
  32 #ifndef AF_BLUETOOTH
  33 #define AF_BLUETOOTH    31
  34 #define PF_BLUETOOTH    AF_BLUETOOTH
  35 #endif
  36
  37 /* Bluetooth versions */
  38 #define BLUETOOTH_VER_1_1       1
  39 #define BLUETOOTH_VER_1_2       2
  40 #define BLUETOOTH_VER_2_0       3
  41
  42 /* Reserv for core and drivers use */
  43 #define BT_SKB_RESERVE  8
  44
  45 #define BTPROTO_L2CAP   0
  46 #define BTPROTO_HCI     1
  47 #define BTPROTO_SCO     2
  48 #define BTPROTO_RFCOMM  3
  49 #define BTPROTO_BNEP    4
  50 #define BTPROTO_CMTP    5
  51 #define BTPROTO_HIDP    6
  52 #define BTPROTO_AVDTP   7
  53
  54 #define SOL_HCI         0
  55 #define SOL_L2CAP       6
  56 #define SOL_SCO         17
  57 #define SOL_RFCOMM      18
  58
  59 #define BT_SECURITY     4
  60 struct bt_security {
  61         __u8 level;
  62         __u8 key_size;
  63 };
  64 #define BT_SECURITY_SDP         0
  65 #define BT_SECURITY_LOW         1
  66 #define BT_SECURITY_MEDIUM      2
  67 #define BT_SECURITY_HIGH        3
  68
  69 #define BT_DEFER_SETUP  7
  70
  71 #define BT_FLUSHABLE    8
  72
  73 #define BT_FLUSHABLE_OFF        0
  74 #define BT_FLUSHABLE_ON         1
  75
  76 #define BT_POWER        9
  77 struct bt_power {
  78         __u8 force_active;
  79 };
  80 #define BT_POWER_FORCE_ACTIVE_OFF 0
  81 #define BT_POWER_FORCE_ACTIVE_ON  1
  82
  83 #define BT_CHANNEL_POLICY       10
  84
  85 /* BR/EDR only (default policy)
  86  *   AMP controllers cannot be used.
  87  *   Channel move requests from the remote device are denied.
  88  *   If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
  89  */
  90 #define BT_CHANNEL_POLICY_BREDR_ONLY            0
  91
  92 /* BR/EDR Preferred
  93  *   Allow use of AMP controllers.
  94  *   If the L2CAP channel is currently on AMP, move it to BR/EDR.
  95  *   Channel move requests from the remote device are allowed.
  96  */
  97 #define BT_CHANNEL_POLICY_BREDR_PREFERRED       1
  98
  99 /* AMP Preferred
 100  *   Allow use of AMP controllers
 101  *   If the L2CAP channel is currently on BR/EDR and AMP controller
 102  *     resources are available, initiate a channel move to AMP.
 103  *   Channel move requests from the remote device are allowed.
 104  *   If the L2CAP socket has not been connected yet, try to create
 105  *     and configure the channel directly on an AMP controller rather
 106  *     than BR/EDR.
 107  */
 108 #define BT_CHANNEL_POLICY_AMP_PREFERRED         2
 109
 110 #define BT_VOICE                11
 111 struct bt_voice {
 112         __u16 setting;
 113 };
 114
 115 #define BT_VOICE_TRANSPARENT                    0x0003
 116 #define BT_VOICE_CVSD_16BIT                     0x0060
 117
 118 __printf(1, 2)
 119 int bt_info(const char *fmt, ...);
 120 __printf(1, 2)
 121 int bt_err(const char *fmt, ...);
 122
 123 #define BT_INFO(fmt, ...)       bt_info(fmt "\n", ##__VA_ARGS__)
 124 #define BT_ERR(fmt, ...)        bt_err(fmt "\n", ##__VA_ARGS__)
 125 #define BT_DBG(fmt, ...)        pr_debug(fmt "\n", ##__VA_ARGS__)
 126
 127 /* Connection and socket states */
 128 enum {
 129         BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
 130         BT_OPEN,
 131         BT_BOUND,
 132         BT_LISTEN,
 133         BT_CONNECT,
 134         BT_CONNECT2,
 135         BT_CONFIG,
 136         BT_DISCONN,
 137         BT_CLOSED
 138 };
 139
 140 /* If unused will be removed by compiler */
 141 static inline const char *state_to_string(int state)
 142 {
 143         switch (state) {
 144         case BT_CONNECTED:
 145                 return "BT_CONNECTED";
 146         case BT_OPEN:
 147                 return "BT_OPEN";
 148         case BT_BOUND:
 149                 return "BT_BOUND";
 150         case BT_LISTEN:
 151                 return "BT_LISTEN";
 152         case BT_CONNECT:
 153                 return "BT_CONNECT";
 154         case BT_CONNECT2:
 155                 return "BT_CONNECT2";
 156         case BT_CONFIG:
 157                 return "BT_CONFIG";
 158         case BT_DISCONN:
 159                 return "BT_DISCONN";
 160         case BT_CLOSED:
 161                 return "BT_CLOSED";
 162         }
 163
 164         return "invalid state";
 165 }
 166
 167 /* BD Address */
 168 typedef struct {
 169         __u8 b[6];
 170 } __packed bdaddr_t;
 171
 172 /* BD Address type */
 173 #define BDADDR_BREDR            0x00
 174 #define BDADDR_LE_PUBLIC        0x01
 175 #define BDADDR_LE_RANDOM        0x02
 176
 177 static inline bool bdaddr_type_is_valid(__u8 type)
 178 {
 179         switch (type) {
 180         case BDADDR_BREDR:
 181         case BDADDR_LE_PUBLIC:
 182         case BDADDR_LE_RANDOM:
 183                 return true;
 184         }
 185
 186         return false;
 187 }
 188
 189 static inline bool bdaddr_type_is_le(__u8 type)
 190 {
 191         switch (type) {
 192         case BDADDR_LE_PUBLIC:
 193         case BDADDR_LE_RANDOM:
 194                 return true;
 195         }
 196
 197         return false;
 198 }
 199
 200 #define BDADDR_ANY   (&(bdaddr_t) {{0, 0, 0, 0, 0, 0} })
 201 #define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff} })
 202
 203 /* Copy, swap, convert BD Address */
 204 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
 205 {
 206         return memcmp(ba1, ba2, sizeof(bdaddr_t));
 207 }
 208 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
 209 {
 210         memcpy(dst, src, sizeof(bdaddr_t));
 211 }
 212
 213 void baswap(bdaddr_t *dst, bdaddr_t *src);
 214
 215 /* Common socket structures and functions */
 216
 217 #define bt_sk(__sk) ((struct bt_sock *) __sk)
 218
 219 struct bt_sock {
 220         struct sock sk;
 221         bdaddr_t    src;
 222         bdaddr_t    dst;
 223         struct list_head accept_q;
 224         struct sock *parent;
 225         unsigned long flags;
 226 };
 227
 228 enum {
 229         BT_SK_DEFER_SETUP,
 230         BT_SK_SUSPEND,
 231 };
 232
 233 struct bt_sock_list {
 234         struct hlist_head head;
 235         rwlock_t          lock;
 236 #ifdef CONFIG_PROC_FS
 237         int (* custom_seq_show)(struct seq_file *, void *);
 238 #endif
 239 };
 240
 241 int  bt_sock_register(int proto, const struct net_proto_family *ops);
 242 void bt_sock_unregister(int proto);
 243 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
 244 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
 245 int  bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 246                                 struct msghdr *msg, size_t len, int flags);
 247 int  bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 248                         struct msghdr *msg, size_t len, int flags);
 249 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
 250 int  bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 251 int  bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
 252
 253 void bt_accept_enqueue(struct sock *parent, struct sock *sk);
 254 void bt_accept_unlink(struct sock *sk);
 255 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
 256
 257 /* Skb helpers */
 258 struct l2cap_ctrl {
 259         unsigned int    sframe:1,
 260                         poll:1,
 261                         final:1,
 262                         fcs:1,
 263                         sar:2,
 264                         super:2;
 265         __u16           reqseq;
 266         __u16           txseq;
 267         __u8            retries;
 268 };
 269
 270 struct hci_dev;
 271
 272 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status);
 273
 274 struct hci_req_ctrl {
 275         bool                    start;
 276         u8                      event;
 277         hci_req_complete_t      complete;
 278 };
 279
 280 struct bt_skb_cb {
 281         __u8 pkt_type;
 282         __u8 incoming;
 283         __u16 expect;
 284         __u8 force_active;
 285         struct l2cap_ctrl control;
 286         struct hci_req_ctrl req;
 287 };
 288 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
 289
 290 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
 291 {
 292         struct sk_buff *skb;
 293
 294         skb = alloc_skb(len + BT_SKB_RESERVE, how);
 295         if (skb) {
 296                 skb_reserve(skb, BT_SKB_RESERVE);
 297                 bt_cb(skb)->incoming  = 0;
 298         }
 299         return skb;
 300 }
 301
 302 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
 303                                         unsigned long len, int nb, int *err)
 304 {
 305         struct sk_buff *skb;
 306
 307         skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
 308         if (skb) {
 309                 skb_reserve(skb, BT_SKB_RESERVE);
 310                 bt_cb(skb)->incoming  = 0;
 311         }
 312
 313         if (!skb && *err)
 314                 return NULL;
 315
 316         *err = sock_error(sk);
 317         if (*err)
 318                 goto out;
 319
 320         if (sk->sk_shutdown) {
 321                 *err = -ECONNRESET;
 322                 goto out;
 323         }
 324
 325         return skb;
 326
 327 out:
 328         kfree_skb(skb);
 329         return NULL;
 330 }
 331
 332 int bt_to_errno(__u16 code);
 333
 334 extern int hci_sock_init(void);
 335 extern void hci_sock_cleanup(void);
 336
 337 extern int bt_sysfs_init(void);
 338 extern void bt_sysfs_cleanup(void);
 339
 340 extern int  bt_procfs_init(struct net *net, const char *name,
 341                            struct bt_sock_list* sk_list,
 342                            int (* seq_show)(struct seq_file *, void *));
 343 extern void bt_procfs_cleanup(struct net *net, const char *name);
 344
 345 extern struct dentry *bt_debugfs;
 346
 347 int l2cap_init(void);
 348 void l2cap_exit(void);
 349
 350 int sco_init(void);
 351 void sco_exit(void);
 352
 353 void bt_sock_reclassify_lock(struct sock *sk, int proto);
 354
 355 #endif /* __BLUETOOTH_H */