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 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0} }) 170 #define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff} }) 171 172 /* Copy, swap, convert BD Address */ 173 static inline int bacmp(bdaddr_t *ba1, bdaddr_t *ba2) 174 { 175 return memcmp(ba1, ba2, sizeof(bdaddr_t)); 176 } 177 static inline void bacpy(bdaddr_t *dst, bdaddr_t *src) 178 { 179 memcpy(dst, src, sizeof(bdaddr_t)); 180 } 181 182 void baswap(bdaddr_t *dst, bdaddr_t *src); 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 #ifdef CONFIG_PROC_FS 206 struct file_operations fops; 207 int (* custom_seq_show)(struct seq_file *, void *); 208 #endif 209 }; 210 211 int bt_sock_register(int proto, const struct net_proto_family *ops); 212 int bt_sock_unregister(int proto); 213 void bt_sock_link(struct bt_sock_list *l, struct sock *s); 214 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); 215 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock, 216 struct msghdr *msg, size_t len, int flags); 217 int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock, 218 struct msghdr *msg, size_t len, int flags); 219 uint bt_sock_poll(struct file *file, struct socket *sock, poll_table *wait); 220 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); 221 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo); 222 223 void bt_accept_enqueue(struct sock *parent, struct sock *sk); 224 void bt_accept_unlink(struct sock *sk); 225 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock); 226 227 /* Skb helpers */ 228 struct l2cap_ctrl { 229 unsigned int sframe:1, 230 poll:1, 231 final:1, 232 fcs:1, 233 sar:2, 234 super:2; 235 __u16 reqseq; 236 __u16 txseq; 237 __u8 retries; 238 }; 239 240 struct bt_skb_cb { 241 __u8 pkt_type; 242 __u8 incoming; 243 __u16 expect; 244 __u8 force_active; 245 struct l2cap_ctrl control; 246 }; 247 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) 248 249 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how) 250 { 251 struct sk_buff *skb; 252 253 skb = alloc_skb(len + BT_SKB_RESERVE, how); 254 if (skb) { 255 skb_reserve(skb, BT_SKB_RESERVE); 256 bt_cb(skb)->incoming = 0; 257 } 258 return skb; 259 } 260 261 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk, 262 unsigned long len, int nb, int *err) 263 { 264 struct sk_buff *skb; 265 266 skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err); 267 if (skb) { 268 skb_reserve(skb, BT_SKB_RESERVE); 269 bt_cb(skb)->incoming = 0; 270 } 271 272 if (!skb && *err) 273 return NULL; 274 275 *err = sock_error(sk); 276 if (*err) 277 goto out; 278 279 if (sk->sk_shutdown) { 280 *err = -ECONNRESET; 281 goto out; 282 } 283 284 return skb; 285 286 out: 287 kfree_skb(skb); 288 return NULL; 289 } 290 291 int bt_to_errno(__u16 code); 292 293 extern int hci_sock_init(void); 294 extern void hci_sock_cleanup(void); 295 296 extern int bt_sysfs_init(void); 297 extern void bt_sysfs_cleanup(void); 298 299 extern int bt_procfs_init(struct module* module, struct net *net, const char *name, 300 struct bt_sock_list* sk_list, 301 int (* seq_show)(struct seq_file *, void *)); 302 extern void bt_procfs_cleanup(struct net *net, const char *name); 303 304 extern struct dentry *bt_debugfs; 305 306 int l2cap_init(void); 307 void l2cap_exit(void); 308 309 int sco_init(void); 310 void sco_exit(void); 311 312 void bt_sock_reclassify_lock(struct sock *sk, int proto); 313 314 #endif /* __BLUETOOTH_H */ 315