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 __printf(1, 2)
 111 int bt_info(const char *fmt, ...);
 112 __printf(1, 2)
 113 int bt_err(const char *fmt, ...);
 114
 115 #define BT_INFO(fmt, ...)       bt_info(fmt "\n", ##__VA_ARGS__)
 116 #define BT_ERR(fmt, ...)        bt_err(fmt "\n", ##__VA_ARGS__)
 117 #define BT_DBG(fmt, ...)        pr_debug(fmt "\n", ##__VA_ARGS__)
 118
 119 /* Connection and socket states */
 120 enum {
 121         BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
 122         BT_OPEN,
 123         BT_BOUND,
 124         BT_LISTEN,
 125         BT_CONNECT,
 126         BT_CONNECT2,
 127         BT_CONFIG,
 128         BT_DISCONN,
 129         BT_CLOSED
 130 };
 131
 132 /* If unused will be removed by compiler */
 133 static inline const char *state_to_string(int state)
 134 {
 135         switch (state) {
 136         case BT_CONNECTED:
 137                 return "BT_CONNECTED";
 138         case BT_OPEN:
 139                 return "BT_OPEN";
 140         case BT_BOUND:
 141                 return "BT_BOUND";
 142         case BT_LISTEN:
 143                 return "BT_LISTEN";
 144         case BT_CONNECT:
 145                 return "BT_CONNECT";
 146         case BT_CONNECT2:
 147                 return "BT_CONNECT2";
 148         case BT_CONFIG:
 149                 return "BT_CONFIG";
 150         case BT_DISCONN:
 151                 return "BT_DISCONN";
 152         case BT_CLOSED:
 153                 return "BT_CLOSED";
 154         }
 155
 156         return "invalid state";
 157 }
 158
 159 /* BD Address */
 160 typedef struct {
 161         __u8 b[6];
 162 } __packed bdaddr_t;
 163
 164 /* BD Address type */
 165 #define BDADDR_BREDR            0x00
 166 #define BDADDR_LE_PUBLIC        0x01
 167 #define BDADDR_LE_RANDOM        0x02
 168
 169 static inline bool bdaddr_type_is_valid(__u8 type)
 170 {
 171         switch (type) {
 172         case BDADDR_BREDR:
 173         case BDADDR_LE_PUBLIC:
 174         case BDADDR_LE_RANDOM:
 175                 return true;
 176         }
 177
 178         return false;
 179 }
 180
 181 static inline bool bdaddr_type_is_le(__u8 type)
 182 {
 183         switch (type) {
 184         case BDADDR_LE_PUBLIC:
 185         case BDADDR_LE_RANDOM:
 186                 return true;
 187         }
 188
 189         return false;
 190 }
 191
 192 #define BDADDR_ANY   (&(bdaddr_t) {{0, 0, 0, 0, 0, 0} })
 193 #define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff} })
 194
 195 /* Copy, swap, convert BD Address */
 196 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2)
 197 {
 198         return memcmp(ba1, ba2, sizeof(bdaddr_t));
 199 }
 200 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src)
 201 {
 202         memcpy(dst, src, sizeof(bdaddr_t));
 203 }
 204
 205 void baswap(bdaddr_t *dst, bdaddr_t *src);
 206
 207 /* Common socket structures and functions */
 208
 209 #define bt_sk(__sk) ((struct bt_sock *) __sk)
 210
 211 struct bt_sock {
 212         struct sock sk;
 213         bdaddr_t    src;
 214         bdaddr_t    dst;
 215         struct list_head accept_q;
 216         struct sock *parent;
 217         unsigned long flags;
 218 };
 219
 220 enum {
 221         BT_SK_DEFER_SETUP,
 222         BT_SK_SUSPEND,
 223 };
 224
 225 struct bt_sock_list {
 226         struct hlist_head head;
 227         rwlock_t          lock;
 228 #ifdef CONFIG_PROC_FS
 229         int (* custom_seq_show)(struct seq_file *, void *);
 230 #endif
 231 };
 232
 233 int  bt_sock_register(int proto, const struct net_proto_family *ops);
 234 void bt_sock_unregister(int proto);
 235 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
 236 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
 237 int  bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 238                                 struct msghdr *msg, size_t len, int flags);
 239 int  bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 240                         struct msghdr *msg, size_t len, int flags);
 241 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
 242 int  bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 243 int  bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
 244
 245 void bt_accept_enqueue(struct sock *parent, struct sock *sk);
 246 void bt_accept_unlink(struct sock *sk);
 247 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
 248
 249 /* Skb helpers */
 250 struct l2cap_ctrl {
 251         unsigned int    sframe:1,
 252                         poll:1,
 253                         final:1,
 254                         fcs:1,
 255                         sar:2,
 256                         super:2;
 257         __u16           reqseq;
 258         __u16           txseq;
 259         __u8            retries;
 260 };
 261
 262 struct hci_dev;
 263
 264 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status);
 265
 266 struct hci_req_ctrl {
 267         bool                    start;
 268         u8                      event;
 269         hci_req_complete_t      complete;
 270 };
 271
 272 struct bt_skb_cb {
 273         __u8 pkt_type;
 274         __u8 incoming;
 275         __u16 expect;
 276         __u8 force_active;
 277         struct l2cap_ctrl control;
 278         struct hci_req_ctrl req;
 279 };
 280 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
 281
 282 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
 283 {
 284         struct sk_buff *skb;
 285
 286         skb = alloc_skb(len + BT_SKB_RESERVE, how);
 287         if (skb) {
 288                 skb_reserve(skb, BT_SKB_RESERVE);
 289                 bt_cb(skb)->incoming  = 0;
 290         }
 291         return skb;
 292 }
 293
 294 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
 295                                         unsigned long len, int nb, int *err)
 296 {
 297         struct sk_buff *skb;
 298
 299         skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
 300         if (skb) {
 301                 skb_reserve(skb, BT_SKB_RESERVE);
 302                 bt_cb(skb)->incoming  = 0;
 303         }
 304
 305         if (!skb && *err)
 306                 return NULL;
 307
 308         *err = sock_error(sk);
 309         if (*err)
 310                 goto out;
 311
 312         if (sk->sk_shutdown) {
 313                 *err = -ECONNRESET;
 314                 goto out;
 315         }
 316
 317         return skb;
 318
 319 out:
 320         kfree_skb(skb);
 321         return NULL;
 322 }
 323
 324 int bt_to_errno(__u16 code);
 325
 326 extern int hci_sock_init(void);
 327 extern void hci_sock_cleanup(void);
 328
 329 extern int bt_sysfs_init(void);
 330 extern void bt_sysfs_cleanup(void);
 331
 332 extern int  bt_procfs_init(struct net *net, const char *name,
 333                            struct bt_sock_list* sk_list,
 334                            int (* seq_show)(struct seq_file *, void *));
 335 extern void bt_procfs_cleanup(struct net *net, const char *name);
 336
 337 extern struct dentry *bt_debugfs;
 338
 339 int l2cap_init(void);
 340 void l2cap_exit(void);
 341
 342 int sco_init(void);
 343 void sco_exit(void);
 344
 345 void bt_sock_reclassify_lock(struct sock *sk, int proto);
 346
 347 #endif /* __BLUETOOTH_H */