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