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 60 struct 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 77 struct 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 #define BT_VOICE 11 111 struct bt_voice { 112 __u16 setting; 113 }; 114 115 #define BT_VOICE_TRANSPARENT 0x0003 116 #define BT_VOICE_CVSD_16BIT 0x0060 117 118 __printf(1, 2) 119 int bt_info(const char *fmt, ...); 120 __printf(1, 2) 121 int bt_err(const char *fmt, ...); 122 123 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__) 124 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__) 125 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__) 126 127 /* Connection and socket states */ 128 enum { 129 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */ 130 BT_OPEN, 131 BT_BOUND, 132 BT_LISTEN, 133 BT_CONNECT, 134 BT_CONNECT2, 135 BT_CONFIG, 136 BT_DISCONN, 137 BT_CLOSED 138 }; 139 140 /* If unused will be removed by compiler */ 141 static inline const char *state_to_string(int state) 142 { 143 switch (state) { 144 case BT_CONNECTED: 145 return "BT_CONNECTED"; 146 case BT_OPEN: 147 return "BT_OPEN"; 148 case BT_BOUND: 149 return "BT_BOUND"; 150 case BT_LISTEN: 151 return "BT_LISTEN"; 152 case BT_CONNECT: 153 return "BT_CONNECT"; 154 case BT_CONNECT2: 155 return "BT_CONNECT2"; 156 case BT_CONFIG: 157 return "BT_CONFIG"; 158 case BT_DISCONN: 159 return "BT_DISCONN"; 160 case BT_CLOSED: 161 return "BT_CLOSED"; 162 } 163 164 return "invalid state"; 165 } 166 167 /* BD Address */ 168 typedef struct { 169 __u8 b[6]; 170 } __packed bdaddr_t; 171 172 /* BD Address type */ 173 #define BDADDR_BREDR 0x00 174 #define BDADDR_LE_PUBLIC 0x01 175 #define BDADDR_LE_RANDOM 0x02 176 177 static inline bool bdaddr_type_is_valid(__u8 type) 178 { 179 switch (type) { 180 case BDADDR_BREDR: 181 case BDADDR_LE_PUBLIC: 182 case BDADDR_LE_RANDOM: 183 return true; 184 } 185 186 return false; 187 } 188 189 static inline bool bdaddr_type_is_le(__u8 type) 190 { 191 switch (type) { 192 case BDADDR_LE_PUBLIC: 193 case BDADDR_LE_RANDOM: 194 return true; 195 } 196 197 return false; 198 } 199 200 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}}) 201 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}) 202 203 /* Copy, swap, convert BD Address */ 204 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2) 205 { 206 return memcmp(ba1, ba2, sizeof(bdaddr_t)); 207 } 208 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src) 209 { 210 memcpy(dst, src, sizeof(bdaddr_t)); 211 } 212 213 void baswap(bdaddr_t *dst, bdaddr_t *src); 214 215 /* Common socket structures and functions */ 216 217 #define bt_sk(__sk) ((struct bt_sock *) __sk) 218 219 struct bt_sock { 220 struct sock sk; 221 struct list_head accept_q; 222 struct sock *parent; 223 unsigned long flags; 224 void (*skb_msg_name)(struct sk_buff *, void *, int *); 225 }; 226 227 enum { 228 BT_SK_DEFER_SETUP, 229 BT_SK_SUSPEND, 230 }; 231 232 struct bt_sock_list { 233 struct hlist_head head; 234 rwlock_t lock; 235 #ifdef CONFIG_PROC_FS 236 int (* custom_seq_show)(struct seq_file *, void *); 237 #endif 238 }; 239 240 int bt_sock_register(int proto, const struct net_proto_family *ops); 241 void bt_sock_unregister(int proto); 242 void bt_sock_link(struct bt_sock_list *l, struct sock *s); 243 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); 244 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, 245 struct msghdr *msg, size_t len, int flags); 246 int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock, 247 struct msghdr *msg, size_t len, int flags); 248 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); 249 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 250 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); 251 int bt_sock_wait_ready(struct sock *sk, unsigned long flags); 252 253 void bt_accept_enqueue(struct sock *parent, struct sock *sk); 254 void bt_accept_unlink(struct sock *sk); 255 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); 256 257 /* Skb helpers */ 258 struct l2cap_ctrl { 259 unsigned int sframe:1, 260 poll:1, 261 final:1, 262 fcs:1, 263 sar:2, 264 super:2; 265 __u16 reqseq; 266 __u16 txseq; 267 __u8 retries; 268 }; 269 270 struct hci_dev; 271 272 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status); 273 274 struct hci_req_ctrl { 275 bool start; 276 u8 event; 277 hci_req_complete_t complete; 278 }; 279 280 struct bt_skb_cb { 281 __u8 pkt_type; 282 __u8 incoming; 283 __u16 expect; 284 __u8 force_active; 285 struct l2cap_chan *chan; 286 struct l2cap_ctrl control; 287 struct hci_req_ctrl req; 288 bdaddr_t bdaddr; 289 __le16 psm; 290 }; 291 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) 292 293 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) 294 { 295 struct sk_buff *skb; 296 297 skb = alloc_skb(len + BT_SKB_RESERVE, how); 298 if (skb) { 299 skb_reserve(skb, BT_SKB_RESERVE); 300 bt_cb(skb)->incoming = 0; 301 } 302 return skb; 303 } 304 305 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, 306 unsigned long len, int nb, int *err) 307 { 308 struct sk_buff *skb; 309 310 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); 311 if (skb) { 312 skb_reserve(skb, BT_SKB_RESERVE); 313 bt_cb(skb)->incoming = 0; 314 } 315 316 if (!skb && *err) 317 return NULL; 318 319 *err = sock_error(sk); 320 if (*err) 321 goto out; 322 323 if (sk->sk_shutdown) { 324 *err = -ECONNRESET; 325 goto out; 326 } 327 328 return skb; 329 330 out: 331 kfree_skb(skb); 332 return NULL; 333 } 334 335 int bt_to_errno(__u16 code); 336 337 int hci_sock_init(void); 338 void hci_sock_cleanup(void); 339 340 int bt_sysfs_init(void); 341 void bt_sysfs_cleanup(void); 342 343 int bt_procfs_init(struct net *net, const char *name, 344 struct bt_sock_list *sk_list, 345 int (*seq_show)(struct seq_file *, void *)); 346 void bt_procfs_cleanup(struct net *net, const char *name); 347 348 extern struct dentry *bt_debugfs; 349 350 int l2cap_init(void); 351 void l2cap_exit(void); 352 353 int sco_init(void); 354 void sco_exit(void); 355 356 void bt_sock_reclassify_lock(struct sock *sk, int proto); 357 358 #endif /* __BLUETOOTH_H */ 359