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 #define BT_SECURITY_FIPS 4 69 70 #define BT_DEFER_SETUP 7 71 72 #define BT_FLUSHABLE 8 73 74 #define BT_FLUSHABLE_OFF 0 75 #define BT_FLUSHABLE_ON 1 76 77 #define BT_POWER 9 78 struct bt_power { 79 __u8 force_active; 80 }; 81 #define BT_POWER_FORCE_ACTIVE_OFF 0 82 #define BT_POWER_FORCE_ACTIVE_ON 1 83 84 #define BT_CHANNEL_POLICY 10 85 86 /* BR/EDR only (default policy) 87 * AMP controllers cannot be used. 88 * Channel move requests from the remote device are denied. 89 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR. 90 */ 91 #define BT_CHANNEL_POLICY_BREDR_ONLY 0 92 93 /* BR/EDR Preferred 94 * Allow use of AMP controllers. 95 * If the L2CAP channel is currently on AMP, move it to BR/EDR. 96 * Channel move requests from the remote device are allowed. 97 */ 98 #define BT_CHANNEL_POLICY_BREDR_PREFERRED 1 99 100 /* AMP Preferred 101 * Allow use of AMP controllers 102 * If the L2CAP channel is currently on BR/EDR and AMP controller 103 * resources are available, initiate a channel move to AMP. 104 * Channel move requests from the remote device are allowed. 105 * If the L2CAP socket has not been connected yet, try to create 106 * and configure the channel directly on an AMP controller rather 107 * than BR/EDR. 108 */ 109 #define BT_CHANNEL_POLICY_AMP_PREFERRED 2 110 111 #define BT_VOICE 11 112 struct bt_voice { 113 __u16 setting; 114 }; 115 116 #define BT_VOICE_TRANSPARENT 0x0003 117 #define BT_VOICE_CVSD_16BIT 0x0060 118 119 #define BT_SNDMTU 12 120 #define BT_RCVMTU 13 121 122 __printf(1, 2) 123 void bt_info(const char *fmt, ...); 124 __printf(1, 2) 125 void bt_err(const char *fmt, ...); 126 127 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__) 128 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__) 129 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__) 130 131 /* Connection and socket states */ 132 enum { 133 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */ 134 BT_OPEN, 135 BT_BOUND, 136 BT_LISTEN, 137 BT_CONNECT, 138 BT_CONNECT2, 139 BT_CONFIG, 140 BT_DISCONN, 141 BT_CLOSED 142 }; 143 144 /* If unused will be removed by compiler */ 145 static inline const char *state_to_string(int state) 146 { 147 switch (state) { 148 case BT_CONNECTED: 149 return "BT_CONNECTED"; 150 case BT_OPEN: 151 return "BT_OPEN"; 152 case BT_BOUND: 153 return "BT_BOUND"; 154 case BT_LISTEN: 155 return "BT_LISTEN"; 156 case BT_CONNECT: 157 return "BT_CONNECT"; 158 case BT_CONNECT2: 159 return "BT_CONNECT2"; 160 case BT_CONFIG: 161 return "BT_CONFIG"; 162 case BT_DISCONN: 163 return "BT_DISCONN"; 164 case BT_CLOSED: 165 return "BT_CLOSED"; 166 } 167 168 return "invalid state"; 169 } 170 171 /* BD Address */ 172 typedef struct { 173 __u8 b[6]; 174 } __packed bdaddr_t; 175 176 /* BD Address type */ 177 #define BDADDR_BREDR 0x00 178 #define BDADDR_LE_PUBLIC 0x01 179 #define BDADDR_LE_RANDOM 0x02 180 181 static inline bool bdaddr_type_is_valid(__u8 type) 182 { 183 switch (type) { 184 case BDADDR_BREDR: 185 case BDADDR_LE_PUBLIC: 186 case BDADDR_LE_RANDOM: 187 return true; 188 } 189 190 return false; 191 } 192 193 static inline bool bdaddr_type_is_le(__u8 type) 194 { 195 switch (type) { 196 case BDADDR_LE_PUBLIC: 197 case BDADDR_LE_RANDOM: 198 return true; 199 } 200 201 return false; 202 } 203 204 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}}) 205 #define BDADDR_NONE (&(bdaddr_t) {{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}}) 206 207 /* Copy, swap, convert BD Address */ 208 static inline int bacmp(const bdaddr_t *ba1, const bdaddr_t *ba2) 209 { 210 return memcmp(ba1, ba2, sizeof(bdaddr_t)); 211 } 212 static inline void bacpy(bdaddr_t *dst, const bdaddr_t *src) 213 { 214 memcpy(dst, src, sizeof(bdaddr_t)); 215 } 216 217 void baswap(bdaddr_t *dst, bdaddr_t *src); 218 219 /* Common socket structures and functions */ 220 221 #define bt_sk(__sk) ((struct bt_sock *) __sk) 222 223 struct bt_sock { 224 struct sock sk; 225 struct list_head accept_q; 226 struct sock *parent; 227 unsigned long flags; 228 void (*skb_msg_name)(struct sk_buff *, void *, int *); 229 }; 230 231 enum { 232 BT_SK_DEFER_SETUP, 233 BT_SK_SUSPEND, 234 }; 235 236 struct bt_sock_list { 237 struct hlist_head head; 238 rwlock_t lock; 239 #ifdef CONFIG_PROC_FS 240 int (* custom_seq_show)(struct seq_file *, void *); 241 #endif 242 }; 243 244 int bt_sock_register(int proto, const struct net_proto_family *ops); 245 void bt_sock_unregister(int proto); 246 void bt_sock_link(struct bt_sock_list *l, struct sock *s); 247 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); 248 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, 249 struct msghdr *msg, size_t len, int flags); 250 int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock, 251 struct msghdr *msg, size_t len, int flags); 252 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); 253 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 254 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); 255 int bt_sock_wait_ready(struct sock *sk, unsigned long flags); 256 257 void bt_accept_enqueue(struct sock *parent, struct sock *sk); 258 void bt_accept_unlink(struct sock *sk); 259 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); 260 261 /* Skb helpers */ 262 struct l2cap_ctrl { 263 __u8 sframe:1, 264 poll:1, 265 final:1, 266 fcs:1, 267 sar:2, 268 super:2; 269 __u16 reqseq; 270 __u16 txseq; 271 __u8 retries; 272 }; 273 274 struct hci_dev; 275 276 typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status); 277 278 struct hci_req_ctrl { 279 bool start; 280 u8 event; 281 hci_req_complete_t complete; 282 }; 283 284 struct bt_skb_cb { 285 __u8 pkt_type; 286 __u8 incoming; 287 __u16 opcode; 288 __u16 expect; 289 __u8 force_active; 290 struct l2cap_chan *chan; 291 struct l2cap_ctrl control; 292 struct hci_req_ctrl req; 293 bdaddr_t bdaddr; 294 __le16 psm; 295 }; 296 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) 297 298 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) 299 { 300 struct sk_buff *skb; 301 302 skb = alloc_skb(len + BT_SKB_RESERVE, how); 303 if (skb) { 304 skb_reserve(skb, BT_SKB_RESERVE); 305 bt_cb(skb)->incoming = 0; 306 } 307 return skb; 308 } 309 310 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, 311 unsigned long len, int nb, int *err) 312 { 313 struct sk_buff *skb; 314 315 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); 316 if (skb) { 317 skb_reserve(skb, BT_SKB_RESERVE); 318 bt_cb(skb)->incoming = 0; 319 } 320 321 if (!skb && *err) 322 return NULL; 323 324 *err = sock_error(sk); 325 if (*err) 326 goto out; 327 328 if (sk->sk_shutdown) { 329 *err = -ECONNRESET; 330 goto out; 331 } 332 333 return skb; 334 335 out: 336 kfree_skb(skb); 337 return NULL; 338 } 339 340 int bt_to_errno(__u16 code); 341 342 int hci_sock_init(void); 343 void hci_sock_cleanup(void); 344 345 int bt_sysfs_init(void); 346 void bt_sysfs_cleanup(void); 347 348 int bt_procfs_init(struct net *net, const char *name, 349 struct bt_sock_list *sk_list, 350 int (*seq_show)(struct seq_file *, void *)); 351 void bt_procfs_cleanup(struct net *net, const char *name); 352 353 extern struct dentry *bt_debugfs; 354 355 int l2cap_init(void); 356 void l2cap_exit(void); 357 358 int sco_init(void); 359 void sco_exit(void); 360 361 void bt_sock_reclassify_lock(struct sock *sk, int proto); 362 363 #endif /* __BLUETOOTH_H */ 364