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 31 #ifndef AF_BLUETOOTH 32 #define AF_BLUETOOTH 31 33 #define PF_BLUETOOTH AF_BLUETOOTH 34 #endif 35 36 /* Bluetooth versions */ 37 #define BLUETOOTH_VER_1_1 1 38 #define BLUETOOTH_VER_1_2 2 39 #define BLUETOOTH_VER_2_0 3 40 41 /* Reserv for core and drivers use */ 42 #define BT_SKB_RESERVE 8 43 44 #define BTPROTO_L2CAP 0 45 #define BTPROTO_HCI 1 46 #define BTPROTO_SCO 2 47 #define BTPROTO_RFCOMM 3 48 #define BTPROTO_BNEP 4 49 #define BTPROTO_CMTP 5 50 #define BTPROTO_HIDP 6 51 #define BTPROTO_AVDTP 7 52 53 #define SOL_HCI 0 54 #define SOL_L2CAP 6 55 #define SOL_SCO 17 56 #define SOL_RFCOMM 18 57 58 #define BT_SECURITY 4 59 struct bt_security { 60 __u8 level; 61 __u8 key_size; 62 }; 63 #define BT_SECURITY_SDP 0 64 #define BT_SECURITY_LOW 1 65 #define BT_SECURITY_MEDIUM 2 66 #define BT_SECURITY_HIGH 3 67 68 #define BT_DEFER_SETUP 7 69 70 #define BT_FLUSHABLE 8 71 72 #define BT_FLUSHABLE_OFF 0 73 #define BT_FLUSHABLE_ON 1 74 75 #define BT_POWER 9 76 struct bt_power { 77 __u8 force_active; 78 }; 79 #define BT_POWER_FORCE_ACTIVE_OFF 0 80 #define BT_POWER_FORCE_ACTIVE_ON 1 81 82 #define BT_CHANNEL_POLICY 10 83 84 /* BR/EDR only (default policy) 85 * AMP controllers cannot be used. 86 * Channel move requests from the remote device are denied. 87 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR. 88 */ 89 #define BT_CHANNEL_POLICY_BREDR_ONLY 0 90 91 /* BR/EDR Preferred 92 * Allow use of AMP controllers. 93 * If the L2CAP channel is currently on AMP, move it to BR/EDR. 94 * Channel move requests from the remote device are allowed. 95 */ 96 #define BT_CHANNEL_POLICY_BREDR_PREFERRED 1 97 98 /* AMP Preferred 99 * Allow use of AMP controllers 100 * If the L2CAP channel is currently on BR/EDR and AMP controller 101 * resources are available, initiate a channel move to AMP. 102 * Channel move requests from the remote device are allowed. 103 * If the L2CAP socket has not been connected yet, try to create 104 * and configure the channel directly on an AMP controller rather 105 * than BR/EDR. 106 */ 107 #define BT_CHANNEL_POLICY_AMP_PREFERRED 2 108 109 __printf(1, 2) 110 int bt_info(const char *fmt, ...); 111 __printf(1, 2) 112 int bt_err(const char *fmt, ...); 113 114 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__) 115 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__) 116 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__) 117 118 /* Connection and socket states */ 119 enum { 120 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */ 121 BT_OPEN, 122 BT_BOUND, 123 BT_LISTEN, 124 BT_CONNECT, 125 BT_CONNECT2, 126 BT_CONFIG, 127 BT_DISCONN, 128 BT_CLOSED 129 }; 130 131 /* If unused will be removed by compiler */ 132 static inline const char *state_to_string(int state) 133 { 134 switch (state) { 135 case BT_CONNECTED: 136 return "BT_CONNECTED"; 137 case BT_OPEN: 138 return "BT_OPEN"; 139 case BT_BOUND: 140 return "BT_BOUND"; 141 case BT_LISTEN: 142 return "BT_LISTEN"; 143 case BT_CONNECT: 144 return "BT_CONNECT"; 145 case BT_CONNECT2: 146 return "BT_CONNECT2"; 147 case BT_CONFIG: 148 return "BT_CONFIG"; 149 case BT_DISCONN: 150 return "BT_DISCONN"; 151 case BT_CLOSED: 152 return "BT_CLOSED"; 153 } 154 155 return "invalid state"; 156 } 157 158 /* BD Address */ 159 typedef struct { 160 __u8 b[6]; 161 } __packed bdaddr_t; 162 163 /* BD Address type */ 164 #define BDADDR_BREDR 0x00 165 #define BDADDR_LE_PUBLIC 0x01 166 #define BDADDR_LE_RANDOM 0x02 167 168 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0} }) 169 #define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff} }) 170 171 /* Copy, swap, convert BD Address */ 172 static inline int bacmp(bdaddr_t *ba1, bdaddr_t *ba2) 173 { 174 return memcmp(ba1, ba2, sizeof(bdaddr_t)); 175 } 176 static inline void bacpy(bdaddr_t *dst, bdaddr_t *src) 177 { 178 memcpy(dst, src, sizeof(bdaddr_t)); 179 } 180 181 void baswap(bdaddr_t *dst, bdaddr_t *src); 182 char *batostr(bdaddr_t *ba); 183 184 /* Common socket structures and functions */ 185 186 #define bt_sk(__sk) ((struct bt_sock *) __sk) 187 188 struct bt_sock { 189 struct sock sk; 190 bdaddr_t src; 191 bdaddr_t dst; 192 struct list_head accept_q; 193 struct sock *parent; 194 unsigned long flags; 195 }; 196 197 enum { 198 BT_SK_DEFER_SETUP, 199 BT_SK_SUSPEND, 200 }; 201 202 struct bt_sock_list { 203 struct hlist_head head; 204 rwlock_t lock; 205 }; 206 207 int bt_sock_register(int proto, const struct net_proto_family *ops); 208 int bt_sock_unregister(int proto); 209 void bt_sock_link(struct bt_sock_list *l, struct sock *s); 210 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); 211 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, 212 struct msghdr *msg, size_t len, int flags); 213 int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock, 214 struct msghdr *msg, size_t len, int flags); 215 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); 216 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 217 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); 218 219 void bt_accept_enqueue(struct sock *parent, struct sock *sk); 220 void bt_accept_unlink(struct sock *sk); 221 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); 222 223 /* Skb helpers */ 224 struct l2cap_ctrl { 225 unsigned int sframe:1, 226 poll:1, 227 final:1, 228 fcs:1, 229 sar:2, 230 super:2; 231 __u16 reqseq; 232 __u16 txseq; 233 __u8 retries; 234 }; 235 236 struct bt_skb_cb { 237 __u8 pkt_type; 238 __u8 incoming; 239 __u16 expect; 240 __u8 force_active; 241 struct l2cap_ctrl control; 242 }; 243 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) 244 245 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) 246 { 247 struct sk_buff *skb; 248 249 skb = alloc_skb(len + BT_SKB_RESERVE, how); 250 if (skb) { 251 skb_reserve(skb, BT_SKB_RESERVE); 252 bt_cb(skb)->incoming = 0; 253 } 254 return skb; 255 } 256 257 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, 258 unsigned long len, int nb, int *err) 259 { 260 struct sk_buff *skb; 261 262 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); 263 if (skb) { 264 skb_reserve(skb, BT_SKB_RESERVE); 265 bt_cb(skb)->incoming = 0; 266 } 267 268 if (!skb && *err) 269 return NULL; 270 271 *err = sock_error(sk); 272 if (*err) 273 goto out; 274 275 if (sk->sk_shutdown) { 276 *err = -ECONNRESET; 277 goto out; 278 } 279 280 return skb; 281 282 out: 283 kfree_skb(skb); 284 return NULL; 285 } 286 287 int bt_to_errno(__u16 code); 288 289 extern int hci_sock_init(void); 290 extern void hci_sock_cleanup(void); 291 292 extern int bt_sysfs_init(void); 293 extern void bt_sysfs_cleanup(void); 294 295 extern struct dentry *bt_debugfs; 296 297 int l2cap_init(void); 298 void l2cap_exit(void); 299 300 int sco_init(void); 301 void sco_exit(void); 302 303 void bt_sock_reclassify_lock(struct sock *sk, int proto); 304 305 #endif /* __BLUETOOTH_H */ 306