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(2, 3)
 113 int bt_printk(const char *level, const char *fmt, ...);
 114
 115 #define BT_INFO(fmt, arg...)   bt_printk(KERN_INFO, pr_fmt(fmt), ##arg)
 116 #define BT_ERR(fmt, arg...)    bt_printk(KERN_ERR, pr_fmt(fmt), ##arg)
 117 #define BT_DBG(fmt, arg...)    pr_debug(fmt "\n", ##arg)
 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 /* BD Address */
 133 typedef struct {
 134         __u8 b[6];
 135 } __packed bdaddr_t;
 136
 137 #define BDADDR_ANY   (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
 138 #define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff}})
 139
 140 /* Copy, swap, convert BD Address */
 141 static inline int bacmp(bdaddr_t *ba1, bdaddr_t *ba2)
 142 {
 143         return memcmp(ba1, ba2, sizeof(bdaddr_t));
 144 }
 145 static inline void bacpy(bdaddr_t *dst, bdaddr_t *src)
 146 {
 147         memcpy(dst, src, sizeof(bdaddr_t));
 148 }
 149
 150 void baswap(bdaddr_t *dst, bdaddr_t *src);
 151 char *batostr(bdaddr_t *ba);
 152 bdaddr_t *strtoba(char *str);
 153
 154 /* Common socket structures and functions */
 155
 156 #define bt_sk(__sk) ((struct bt_sock *) __sk)
 157
 158 struct bt_sock {
 159         struct sock sk;
 160         bdaddr_t    src;
 161         bdaddr_t    dst;
 162         struct list_head accept_q;
 163         struct sock *parent;
 164         u32 defer_setup;
 165 };
 166
 167 struct bt_sock_list {
 168         struct hlist_head head;
 169         rwlock_t          lock;
 170 };
 171
 172 int  bt_sock_register(int proto, const struct net_proto_family *ops);
 173 int  bt_sock_unregister(int proto);
 174 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
 175 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
 176 int  bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 177                                 struct msghdr *msg, size_t len, int flags);
 178 int  bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 179                         struct msghdr *msg, size_t len, int flags);
 180 uint bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait);
 181 int  bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 182 int  bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
 183
 184 void bt_accept_enqueue(struct sock *parent, struct sock *sk);
 185 void bt_accept_unlink(struct sock *sk);
 186 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
 187
 188 /* Skb helpers */
 189 struct bt_skb_cb {
 190         __u8 pkt_type;
 191         __u8 incoming;
 192         __u16 expect;
 193         __u16 tx_seq;
 194         __u8 retries;
 195         __u8 sar;
 196         unsigned short channel;
 197         __u8 force_active;
 198 };
 199 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
 200
 201 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
 202 {
 203         struct sk_buff *skb;
 204
 205         if ((skb = alloc_skb(len + BT_SKB_RESERVE, how))) {
 206                 skb_reserve(skb, BT_SKB_RESERVE);
 207                 bt_cb(skb)->incoming  = 0;
 208         }
 209         return skb;
 210 }
 211
 212 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
 213                                         unsigned long len, int nb, int *err)
 214 {
 215         struct sk_buff *skb;
 216
 217         release_sock(sk);
 218         if ((skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err))) {
 219                 skb_reserve(skb, BT_SKB_RESERVE);
 220                 bt_cb(skb)->incoming  = 0;
 221         }
 222         lock_sock(sk);
 223
 224         if (!skb && *err)
 225                 return NULL;
 226
 227         *err = sock_error(sk);
 228         if (*err)
 229                 goto out;
 230
 231         if (sk->sk_shutdown) {
 232                 *err = -ECONNRESET;
 233                 goto out;
 234         }
 235
 236         return skb;
 237
 238 out:
 239         kfree_skb(skb);
 240         return NULL;
 241 }
 242
 243 int bt_to_errno(__u16 code);
 244
 245 extern int hci_sock_init(void);
 246 extern void hci_sock_cleanup(void);
 247
 248 extern int bt_sysfs_init(void);
 249 extern void bt_sysfs_cleanup(void);
 250
 251 extern struct dentry *bt_debugfs;
 252
 253 int l2cap_init(void);
 254 void l2cap_exit(void);
 255
 256 int sco_init(void);
 257 void sco_exit(void);
 258
 259 void bt_sock_reclassify_lock(struct sock *sk, int proto);
 260
 261 #endif /* __BLUETOOTH_H */