linux/include/net/bluetooth/bluetooth.h
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   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
  62struct 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
  79struct 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)
 113int 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 */
 120enum {
 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 */
 133typedef 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 */
 141static inline int bacmp(bdaddr_t *ba1, bdaddr_t *ba2)
 142{
 143        return memcmp(ba1, ba2, sizeof(bdaddr_t));
 144}
 145static inline void bacpy(bdaddr_t *dst, bdaddr_t *src)
 146{
 147        memcpy(dst, src, sizeof(bdaddr_t));
 148}
 149
 150void baswap(bdaddr_t *dst, bdaddr_t *src);
 151char *batostr(bdaddr_t *ba);
 152bdaddr_t *strtoba(char *str);
 153
 154/* Common socket structures and functions */
 155
 156#define bt_sk(__sk) ((struct bt_sock *) __sk)
 157
 158struct 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
 167struct bt_sock_list {
 168        struct hlist_head head;
 169        rwlock_t          lock;
 170};
 171
 172int  bt_sock_register(int proto, const struct net_proto_family *ops);
 173int  bt_sock_unregister(int proto);
 174void bt_sock_link(struct bt_sock_list *l, struct sock *s);
 175void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
 176int  bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 177                                struct msghdr *msg, size_t len, int flags);
 178int  bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 179                        struct msghdr *msg, size_t len, int flags);
 180uint bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait);
 181int  bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 182int  bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
 183
 184void bt_accept_enqueue(struct sock *parent, struct sock *sk);
 185void bt_accept_unlink(struct sock *sk);
 186struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
 187
 188/* Skb helpers */
 189struct 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
 201static 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
 212static 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
 238out:
 239        kfree_skb(skb);
 240        return NULL;
 241}
 242
 243int bt_to_errno(__u16 code);
 244
 245extern int hci_sock_init(void);
 246extern void hci_sock_cleanup(void);
 247
 248extern int bt_sysfs_init(void);
 249extern void bt_sysfs_cleanup(void);
 250
 251extern struct dentry *bt_debugfs;
 252
 253int l2cap_init(void);
 254void l2cap_exit(void);
 255
 256int sco_init(void);
 257void sco_exit(void);
 258
 259void bt_sock_reclassify_lock(struct sock *sk, int proto);
 260
 261#endif /* __BLUETOOTH_H */
 262