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 <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
  60struct 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
  77struct 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)
 111int bt_info(const char *fmt, ...);
 112__printf(1, 2)
 113int 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 */
 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/* If unused will be removed by compiler */
 133static 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 */
 160typedef 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#define BDADDR_ANY   (&(bdaddr_t) {{0, 0, 0, 0, 0, 0} })
 170#define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff} })
 171
 172/* Copy, swap, convert BD Address */
 173static inline int bacmp(bdaddr_t *ba1, bdaddr_t *ba2)
 174{
 175        return memcmp(ba1, ba2, sizeof(bdaddr_t));
 176}
 177static inline void bacpy(bdaddr_t *dst, bdaddr_t *src)
 178{
 179        memcpy(dst, src, sizeof(bdaddr_t));
 180}
 181
 182void baswap(bdaddr_t *dst, bdaddr_t *src);
 183char *batostr(bdaddr_t *ba);
 184
 185/* Common socket structures and functions */
 186
 187#define bt_sk(__sk) ((struct bt_sock *) __sk)
 188
 189struct bt_sock {
 190        struct sock sk;
 191        bdaddr_t    src;
 192        bdaddr_t    dst;
 193        struct list_head accept_q;
 194        struct sock *parent;
 195        unsigned long flags;
 196};
 197
 198enum {
 199        BT_SK_DEFER_SETUP,
 200        BT_SK_SUSPEND,
 201};
 202
 203struct bt_sock_list {
 204        struct hlist_head head;
 205        rwlock_t          lock;
 206#ifdef CONFIG_PROC_FS
 207        struct file_operations   fops;
 208        int (* custom_seq_show)(struct seq_file *, void *);
 209#endif
 210};
 211
 212int  bt_sock_register(int proto, const struct net_proto_family *ops);
 213int  bt_sock_unregister(int proto);
 214void bt_sock_link(struct bt_sock_list *l, struct sock *s);
 215void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
 216int  bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
 217                                struct msghdr *msg, size_t len, int flags);
 218int  bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
 219                        struct msghdr *msg, size_t len, int flags);
 220uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait);
 221int  bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 222int  bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
 223
 224void bt_accept_enqueue(struct sock *parent, struct sock *sk);
 225void bt_accept_unlink(struct sock *sk);
 226struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
 227
 228/* Skb helpers */
 229struct l2cap_ctrl {
 230        unsigned int    sframe:1,
 231                        poll:1,
 232                        final:1,
 233                        fcs:1,
 234                        sar:2,
 235                        super:2;
 236        __u16           reqseq;
 237        __u16           txseq;
 238        __u8            retries;
 239};
 240
 241struct bt_skb_cb {
 242        __u8 pkt_type;
 243        __u8 incoming;
 244        __u16 expect;
 245        __u8 force_active;
 246        struct l2cap_ctrl control;
 247};
 248#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
 249
 250static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
 251{
 252        struct sk_buff *skb;
 253
 254        skb = alloc_skb(len + BT_SKB_RESERVE, how);
 255        if (skb) {
 256                skb_reserve(skb, BT_SKB_RESERVE);
 257                bt_cb(skb)->incoming  = 0;
 258        }
 259        return skb;
 260}
 261
 262static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
 263                                        unsigned long len, int nb, int *err)
 264{
 265        struct sk_buff *skb;
 266
 267        skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
 268        if (skb) {
 269                skb_reserve(skb, BT_SKB_RESERVE);
 270                bt_cb(skb)->incoming  = 0;
 271        }
 272
 273        if (!skb && *err)
 274                return NULL;
 275
 276        *err = sock_error(sk);
 277        if (*err)
 278                goto out;
 279
 280        if (sk->sk_shutdown) {
 281                *err = -ECONNRESET;
 282                goto out;
 283        }
 284
 285        return skb;
 286
 287out:
 288        kfree_skb(skb);
 289        return NULL;
 290}
 291
 292int bt_to_errno(__u16 code);
 293
 294extern int hci_sock_init(void);
 295extern void hci_sock_cleanup(void);
 296
 297extern int bt_sysfs_init(void);
 298extern void bt_sysfs_cleanup(void);
 299
 300extern int  bt_procfs_init(struct module* module, struct net *net, const char *name,
 301                           struct bt_sock_list* sk_list,
 302                           int (* seq_show)(struct seq_file *, void *));
 303extern void bt_procfs_cleanup(struct net *net, const char *name);
 304
 305extern struct dentry *bt_debugfs;
 306
 307int l2cap_init(void);
 308void l2cap_exit(void);
 309
 310int sco_init(void);
 311void sco_exit(void);
 312
 313void bt_sock_reclassify_lock(struct sock *sk, int proto);
 314
 315#endif /* __BLUETOOTH_H */
 316
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