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 }; 195 196 struct bt_sock_list { 197 struct hlist_head head; 198 rwlock_t lock; 199 }; 200 201 int bt_sock_register(int proto, const struct net_proto_family *ops); 202 int bt_sock_unregister(int proto); 203 void bt_sock_link(struct bt_sock_list *l, struct sock *s); 204 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); 205 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, 206 struct msghdr *msg, size_t len, int flags); 207 int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock, 208 struct msghdr *msg, size_t len, int flags); 209 uint bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait); 210 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 211 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); 212 213 void bt_accept_enqueue(struct sock *parent, struct sock *sk); 214 void bt_accept_unlink(struct sock *sk); 215 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); 216 217 /* Skb helpers */ 218 struct bt_skb_cb { 219 __u8 pkt_type; 220 __u8 incoming; 221 __u16 expect; 222 __u16 tx_seq; 223 __u8 retries; 224 __u8 sar; 225 __u8 force_active; 226 }; 227 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) 228 229 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) 230 { 231 struct sk_buff *skb; 232 233 if ((skb = alloc_skb(len + BT_SKB_RESERVE, how))) { 234 skb_reserve(skb, BT_SKB_RESERVE); 235 bt_cb(skb)->incoming = 0; 236 } 237 return skb; 238 } 239 240 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, 241 unsigned long len, int nb, int *err) 242 { 243 struct sk_buff *skb; 244 245 release_sock(sk); 246 if ((skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err))) { 247 skb_reserve(skb, BT_SKB_RESERVE); 248 bt_cb(skb)->incoming = 0; 249 } 250 lock_sock(sk); 251 252 if (!skb && *err) 253 return NULL; 254 255 *err = sock_error(sk); 256 if (*err) 257 goto out; 258 259 if (sk->sk_shutdown) { 260 *err = -ECONNRESET; 261 goto out; 262 } 263 264 return skb; 265 266 out: 267 kfree_skb(skb); 268 return NULL; 269 } 270 271 int bt_to_errno(__u16 code); 272 273 extern int hci_sock_init(void); 274 extern void hci_sock_cleanup(void); 275 276 extern int bt_sysfs_init(void); 277 extern void bt_sysfs_cleanup(void); 278 279 extern struct dentry *bt_debugfs; 280 281 int l2cap_init(void); 282 void l2cap_exit(void); 283 284 int sco_init(void); 285 void sco_exit(void); 286 287 void bt_sock_reclassify_lock(struct sock *sk, int proto); 288 289 #endif /* __BLUETOOTH_H */ 290