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 <asm/types.h>
  29 #include <asm/byteorder.h>
  30 #include <linux/list.h>
  31 #include <linux/poll.h>
  32 #include <net/sock.h>
  33
  34 #ifndef AF_BLUETOOTH
  35 #define AF_BLUETOOTH    31
  36 #define PF_BLUETOOTH    AF_BLUETOOTH
  37 #endif
  38
  39 /* Bluetooth versions */
  40 #define BLUETOOTH_VER_1_1       1
  41 #define BLUETOOTH_VER_1_2       2
  42 #define BLUETOOTH_VER_2_0       3
  43
  44 /* Reserv for core and drivers use */
  45 #define BT_SKB_RESERVE  8
  46
  47 #define BTPROTO_L2CAP   0
  48 #define BTPROTO_HCI     1
  49 #define BTPROTO_SCO     2
  50 #define BTPROTO_RFCOMM  3
  51 #define BTPROTO_BNEP    4
  52 #define BTPROTO_CMTP    5
  53 #define BTPROTO_HIDP    6
  54 #define BTPROTO_AVDTP   7
  55
  56 #define SOL_HCI         0
  57 #define SOL_L2CAP       6
  58 #define SOL_SCO         17
  59 #define SOL_RFCOMM      18
  60
  61 #define BT_SECURITY     4
  62 struct bt_security {
  63         __u8 level;
  64         __u8 key_size;
  65 };
  66 #define BT_SECURITY_SDP         0
  67 #define BT_SECURITY_LOW         1
  68 #define BT_SECURITY_MEDIUM      2
  69 #define BT_SECURITY_HIGH        3
  70
  71 #define BT_DEFER_SETUP  7
  72
  73 #define BT_FLUSHABLE    8
  74
  75 #define BT_FLUSHABLE_OFF        0
  76 #define BT_FLUSHABLE_ON         1
  77
  78 #define BT_POWER        9
  79 struct bt_power {
  80         __u8 force_active;
  81 };
  82 #define BT_POWER_FORCE_ACTIVE_OFF 0
  83 #define BT_POWER_FORCE_ACTIVE_ON  1
  84
  85 #define BT_CHANNEL_POLICY       10
  86
  87 /* BR/EDR only (default policy)
  88  *   AMP controllers cannot be used.
  89  *   Channel move requests from the remote device are denied.
  90  *   If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
  91  */
  92 #define BT_CHANNEL_POLICY_BREDR_ONLY            0
  93
  94 /* BR/EDR Preferred
  95  *   Allow use of AMP controllers.
  96  *   If the L2CAP channel is currently on AMP, move it to BR/EDR.
  97  *   Channel move requests from the remote device are allowed.
  98  */
  99 #define BT_CHANNEL_POLICY_BREDR_PREFERRED       1
 100
 101 /* AMP Preferred
 102  *   Allow use of AMP controllers
 103  *   If the L2CAP channel is currently on BR/EDR and AMP controller
 104  *     resources are available, initiate a channel move to AMP.
 105  *   Channel move requests from the remote device are allowed.
 106  *   If the L2CAP socket has not been connected yet, try to create
 107  *     and configure the channel directly on an AMP controller rather
 108  *     than BR/EDR.
 109  */
 110 #define BT_CHANNEL_POLICY_AMP_PREFERRED         2
 111
 112 __printf(1, 2)
 113 int bt_info(const char *fmt, ...);
 114 __printf(1, 2)
 115 int bt_err(const char *fmt, ...);
 116
 117 #define BT_INFO(fmt, ...)       bt_info(fmt "\n", ##__VA_ARGS__)
 118 #define BT_ERR(fmt, ...)        bt_err(fmt "\n", ##__VA_ARGS__)
 119 #define BT_DBG(fmt, ...)        pr_debug(fmt "\n", ##__VA_ARGS__)
 120
 121 /* Connection and socket states */
 122 enum {
 123         BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
 124         BT_OPEN,
 125         BT_BOUND,
 126         BT_LISTEN,
 127         BT_CONNECT,
 128         BT_CONNECT2,
 129         BT_CONFIG,
 130         BT_DISCONN,
 131         BT_CLOSED
 132 };
 133
 134 /* If unused will be removed by compiler */
 135 static inline const char *state_to_string(int state)
 136 {
 137         switch (state) {
 138         case BT_CONNECTED:
 139                 return "BT_CONNECTED";
 140         case BT_OPEN:
 141                 return "BT_OPEN";
 142         case BT_BOUND:
 143                 return "BT_BOUND";
 144         case BT_LISTEN:
 145                 return "BT_LISTEN";
 146         case BT_CONNECT:
 147                 return "BT_CONNECT";
 148         case BT_CONNECT2:
 149                 return "BT_CONNECT2";
 150         case BT_CONFIG:
 151                 return "BT_CONFIG";
 152         case BT_DISCONN:
 153                 return "BT_DISCONN";
 154         case BT_CLOSED:
 155                 return "BT_CLOSED";
 156         }
 157
 158         return "invalid state";
 159 }
 160
 161 /* BD Address */
 162 typedef struct {
 163         __u8 b[6];
 164 } __packed bdaddr_t;
 165
 166 #define BDADDR_ANY   (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
 167 #define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff}})
 168
 169 /* Copy, swap, convert BD Address */
 170 static inline int bacmp(bdaddr_t *ba1, bdaddr_t *ba2)
 171 {
 172         return memcmp(ba1, ba2, sizeof(bdaddr_t));
 173 }
 174 static inline void bacpy(bdaddr_t *dst, bdaddr_t *src)
 175 {
 176         memcpy(dst, src, sizeof(bdaddr_t));
 177 }
 178
 179 void baswap(bdaddr_t *dst, bdaddr_t *src);
 180 char *batostr(bdaddr_t *ba);
 181 bdaddr_t *strtoba(char *str);
 182
 183 /* Common socket structures and functions */
 184
 185 #define bt_sk(__sk) ((struct bt_sock *) __sk)
 186
 187 struct bt_sock {
 188         struct sock sk;
 189         bdaddr_t    src;
 190         bdaddr_t    dst;
 191         struct list_head accept_q;
 192         struct sock *parent;
 193         u32 defer_setup;
 194         bool suspended;
 195 };
 196
 197 struct bt_sock_list {
 198         struct hlist_head head;
 199         rwlock_t          lock;
 200 };
 201
 202 int  bt_sock_register(int proto, const struct net_proto_family *ops);
 203 int  bt_sock_unregister(int proto);
 204 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
 205 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
 206 int  bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 207                                 struct msghdr *msg, size_t len, int flags);
 208 int  bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 209                         struct msghdr *msg, size_t len, int flags);
 210 uint bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait);
 211 int  bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 212 int  bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
 213
 214 void bt_accept_enqueue(struct sock *parent, struct sock *sk);
 215 void bt_accept_unlink(struct sock *sk);
 216 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
 217
 218 /* Skb helpers */
 219 struct bt_skb_cb {
 220         __u8 pkt_type;
 221         __u8 incoming;
 222         __u16 expect;
 223         __u16 tx_seq;
 224         __u8 retries;
 225         __u8 sar;
 226         __u8 force_active;
 227 };
 228 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
 229
 230 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
 231 {
 232         struct sk_buff *skb;
 233
 234         if ((skb = alloc_skb(len + BT_SKB_RESERVE, how))) {
 235                 skb_reserve(skb, BT_SKB_RESERVE);
 236                 bt_cb(skb)->incoming  = 0;
 237         }
 238         return skb;
 239 }
 240
 241 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
 242                                         unsigned long len, int nb, int *err)
 243 {
 244         struct sk_buff *skb;
 245
 246         release_sock(sk);
 247         if ((skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err))) {
 248                 skb_reserve(skb, BT_SKB_RESERVE);
 249                 bt_cb(skb)->incoming  = 0;
 250         }
 251         lock_sock(sk);
 252
 253         if (!skb && *err)
 254                 return NULL;
 255
 256         *err = sock_error(sk);
 257         if (*err)
 258                 goto out;
 259
 260         if (sk->sk_shutdown) {
 261                 *err = -ECONNRESET;
 262                 goto out;
 263         }
 264
 265         return skb;
 266
 267 out:
 268         kfree_skb(skb);
 269         return NULL;
 270 }
 271
 272 int bt_to_errno(__u16 code);
 273
 274 extern int hci_sock_init(void);
 275 extern void hci_sock_cleanup(void);
 276
 277 extern int bt_sysfs_init(void);
 278 extern void bt_sysfs_cleanup(void);
 279
 280 extern struct dentry *bt_debugfs;
 281
 282 int l2cap_init(void);
 283 void l2cap_exit(void);
 284
 285 int sco_init(void);
 286 void sco_exit(void);
 287
 288 void bt_sock_reclassify_lock(struct sock *sk, int proto);
 289
 290 #endif /* __BLUETOOTH_H */