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 #define BT_SNDMTU 12 119 #define BT_RCVMTU 13 120 121 __printf(1, 2) 122 int bt_info(const char *fmt, ...); 123 __printf(1, 2) 124 int bt_err(const char *fmt, ...); 125 126 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__) 127 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__) 128 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__) 129 130 /* Connection and socket states */ 131 enum { 132 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */ 133 BT_OPEN, 134 BT_BOUND, 135 BT_LISTEN, 136 BT_CONNECT, 137 BT_CONNECT2, 138 BT_CONFIG, 139 BT_DISCONN, 140 BT_CLOSED 141 }; 142 143 /* If unused will be removed by compiler */ 144 static inline const char *state_to_string(int state) 145 { 146 switch (state) { 147 case BT_CONNECTED: 148 return "BT_CONNECTED"; 149 case BT_OPEN: 150 return "BT_OPEN"; 151 case BT_BOUND: 152 return "BT_BOUND"; 153 case BT_LISTEN: 154 return "BT_LISTEN"; 155 case BT_CONNECT: 156 return "BT_CONNECT"; 157 case BT_CONNECT2: 158 return "BT_CONNECT2"; 159 case BT_CONFIG: 160 return "BT_CONFIG"; 161 case BT_DISCONN: 162 return "BT_DISCONN"; 163 case BT_CLOSED: 164 return "BT_CLOSED"; 165 } 166 167 return "invalid state"; 168 } 169 170 /* BD Address */ 171 typedef struct { 172 __u8 b[6]; 173 } __packed bdaddr_t; 174 175 /* BD Address type */ 176 #define BDADDR_BREDR 0x00 177 #define BDADDR_LE_PUBLIC 0x01 178 #define BDADDR_LE_RANDOM 0x02 179 180 static inline bool bdaddr_type_is_valid(__u8 type) 181 { 182 switch (type) { 183 case BDADDR_BREDR: 184 case BDADDR_LE_PUBLIC: 185 case BDADDR_LE_RANDOM: 186 return true; 187 } 188 189 return false; 190 } 191 192 static inline bool bdaddr_type_is_le(__u8 type) 193 { 194 switch (type) { 195 case BDADDR_LE_PUBLIC: 196 case BDADDR_LE_RANDOM: 197 return true; 198 } 199 200 return false; 201 } 202 203 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}}) 204 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}) 205 206 /* Copy, swap, convert BD Address */ 207 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2) 208 { 209 return memcmp(ba1, ba2, sizeof(bdaddr_t)); 210 } 211 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src) 212 { 213 memcpy(dst, src, sizeof(bdaddr_t)); 214 } 215 216 void baswap(bdaddr_t *dst, bdaddr_t *src); 217 218 /* Common socket structures and functions */ 219 220 #define bt_sk(__sk) ((struct bt_sock *) __sk) 221 222 struct bt_sock { 223 struct sock sk; 224 struct list_head accept_q; 225 struct sock *parent; 226 unsigned long flags; 227 void (*skb_msg_name)(struct sk_buff *, void *, int *); 228 }; 229 230 enum { 231 BT_SK_DEFER_SETUP, 232 BT_SK_SUSPEND, 233 }; 234 235 struct bt_sock_list { 236 struct hlist_head head; 237 rwlock_t lock; 238 #ifdef CONFIG_PROC_FS 239 int (* custom_seq_show)(struct seq_file *, void *); 240 #endif 241 }; 242 243 int bt_sock_register(int proto, const struct net_proto_family *ops); 244 void bt_sock_unregister(int proto); 245 void bt_sock_link(struct bt_sock_list *l, struct sock *s); 246 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); 247 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, 248 struct msghdr *msg, size_t len, int flags); 249 int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock, 250 struct msghdr *msg, size_t len, int flags); 251 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); 252 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 253 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); 254 int bt_sock_wait_ready(struct sock *sk, unsigned long flags); 255 256 void bt_accept_enqueue(struct sock *parent, struct sock *sk); 257 void bt_accept_unlink(struct sock *sk); 258 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); 259 260 /* Skb helpers */ 261 struct l2cap_ctrl { 262 unsigned int sframe:1, 263 poll:1, 264 final:1, 265 fcs:1, 266 sar:2, 267 super:2; 268 __u16 reqseq; 269 __u16 txseq; 270 __u8 retries; 271 }; 272 273 struct hci_dev; 274 275 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status); 276 277 struct hci_req_ctrl { 278 bool start; 279 u8 event; 280 hci_req_complete_t complete; 281 }; 282 283 struct bt_skb_cb { 284 __u8 pkt_type; 285 __u8 incoming; 286 __u16 expect; 287 __u8 force_active; 288 struct l2cap_chan *chan; 289 struct l2cap_ctrl control; 290 struct hci_req_ctrl req; 291 bdaddr_t bdaddr; 292 __le16 psm; 293 }; 294 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) 295 296 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) 297 { 298 struct sk_buff *skb; 299 300 skb = alloc_skb(len + BT_SKB_RESERVE, how); 301 if (skb) { 302 skb_reserve(skb, BT_SKB_RESERVE); 303 bt_cb(skb)->incoming = 0; 304 } 305 return skb; 306 } 307 308 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, 309 unsigned long len, int nb, int *err) 310 { 311 struct sk_buff *skb; 312 313 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); 314 if (skb) { 315 skb_reserve(skb, BT_SKB_RESERVE); 316 bt_cb(skb)->incoming = 0; 317 } 318 319 if (!skb && *err) 320 return NULL; 321 322 *err = sock_error(sk); 323 if (*err) 324 goto out; 325 326 if (sk->sk_shutdown) { 327 *err = -ECONNRESET; 328 goto out; 329 } 330 331 return skb; 332 333 out: 334 kfree_skb(skb); 335 return NULL; 336 } 337 338 int bt_to_errno(__u16 code); 339 340 int hci_sock_init(void); 341 void hci_sock_cleanup(void); 342 343 int bt_sysfs_init(void); 344 void bt_sysfs_cleanup(void); 345 346 int bt_procfs_init(struct net *net, const char *name, 347 struct bt_sock_list *sk_list, 348 int (*seq_show)(struct seq_file *, void *)); 349 void bt_procfs_cleanup(struct net *net, const char *name); 350 351 extern struct dentry *bt_debugfs; 352 353 int l2cap_init(void); 354 void l2cap_exit(void); 355 356 int sco_init(void); 357 void sco_exit(void); 358 359 void bt_sock_reclassify_lock(struct sock *sk, int proto); 360 361 #endif /* __BLUETOOTH_H */ 362