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 <asm/types.h>
29 #include <asm/byteorder.h>
30 #include <linux/list.h>
31 #include <linux/poll.h>
32 #include <net/sock.h>
33
34 #ifndef AF_BLUETOOTH
35 #define AF_BLUETOOTH 31
36 #define PF_BLUETOOTH AF_BLUETOOTH
37 #endif
38
39 /* Bluetooth versions */
40 #define BLUETOOTH_VER_1_1 1
41 #define BLUETOOTH_VER_1_2 2
42 #define BLUETOOTH_VER_2_0 3
43
44 /* Reserv for core and drivers use */
45 #define BT_SKB_RESERVE 8
46
47 #define BTPROTO_L2CAP 0
48 #define BTPROTO_HCI 1
49 #define BTPROTO_SCO 2
50 #define BTPROTO_RFCOMM 3
51 #define BTPROTO_BNEP 4
52 #define BTPROTO_CMTP 5
53 #define BTPROTO_HIDP 6
54 #define BTPROTO_AVDTP 7
55
56 #define SOL_HCI 0
57 #define SOL_L2CAP 6
58 #define SOL_SCO 17
59 #define SOL_RFCOMM 18
60
61 #define BT_SECURITY 4
62 struct bt_security {
63 __u8 level;
64 __u8 key_size;
65 };
66 #define BT_SECURITY_SDP 0
67 #define BT_SECURITY_LOW 1
68 #define BT_SECURITY_MEDIUM 2
69 #define BT_SECURITY_HIGH 3
70
71 #define BT_DEFER_SETUP 7
72
73 #define BT_FLUSHABLE 8
74
75 #define BT_FLUSHABLE_OFF 0
76 #define BT_FLUSHABLE_ON 1
77
78 #define BT_POWER 9
79 struct bt_power {
80 __u8 force_active;
81 };
82 #define BT_POWER_FORCE_ACTIVE_OFF 0
83 #define BT_POWER_FORCE_ACTIVE_ON 1
84
85 #define BT_CHANNEL_POLICY 10
86
87 /* BR/EDR only (default policy)
88 * AMP controllers cannot be used.
89 * Channel move requests from the remote device are denied.
90 * If the L2CAP channel is currently using AMP, move the channel to BR/EDR.
91 */
92 #define BT_CHANNEL_POLICY_BREDR_ONLY 0
93
94 /* BR/EDR Preferred
95 * Allow use of AMP controllers.
96 * If the L2CAP channel is currently on AMP, move it to BR/EDR.
97 * Channel move requests from the remote device are allowed.
98 */
99 #define BT_CHANNEL_POLICY_BREDR_PREFERRED 1
100
101 /* AMP Preferred
102 * Allow use of AMP controllers
103 * If the L2CAP channel is currently on BR/EDR and AMP controller
104 * resources are available, initiate a channel move to AMP.
105 * Channel move requests from the remote device are allowed.
106 * If the L2CAP socket has not been connected yet, try to create
107 * and configure the channel directly on an AMP controller rather
108 * than BR/EDR.
109 */
110 #define BT_CHANNEL_POLICY_AMP_PREFERRED 2
111
112 __printf(1, 2)
113 int bt_info(const char *fmt, ...);
114 __printf(1, 2)
115 int bt_err(const char *fmt, ...);
116
117 #define BT_INFO(fmt, ...) bt_info(fmt "\n", ##__VA_ARGS__)
118 #define BT_ERR(fmt, ...) bt_err(fmt "\n", ##__VA_ARGS__)
119 #define BT_DBG(fmt, ...) pr_debug(fmt "\n", ##__VA_ARGS__)
120
121 /* Connection and socket states */
122 enum {
123 BT_CONNECTED = 1, /* Equal to TCP_ESTABLISHED to make net code happy */
124 BT_OPEN,
125 BT_BOUND,
126 BT_LISTEN,
127 BT_CONNECT,
128 BT_CONNECT2,
129 BT_CONFIG,
130 BT_DISCONN,
131 BT_CLOSED
132 };
133
134 /* If unused will be removed by compiler */
state_to_string(int state)135 static inline const char *state_to_string(int state)
136 {
137 switch (state) {
138 case BT_CONNECTED:
139 return "BT_CONNECTED";
140 case BT_OPEN:
141 return "BT_OPEN";
142 case BT_BOUND:
143 return "BT_BOUND";
144 case BT_LISTEN:
145 return "BT_LISTEN";
146 case BT_CONNECT:
147 return "BT_CONNECT";
148 case BT_CONNECT2:
149 return "BT_CONNECT2";
150 case BT_CONFIG:
151 return "BT_CONFIG";
152 case BT_DISCONN:
153 return "BT_DISCONN";
154 case BT_CLOSED:
155 return "BT_CLOSED";
156 }
157
158 return "invalid state";
159 }
160
161 /* BD Address */
162 typedef struct {
163 __u8 b[6];
164 } __packed bdaddr_t;
165
166 #define BDADDR_ANY (&(bdaddr_t) {{0, 0, 0, 0, 0, 0}})
167 #define BDADDR_LOCAL (&(bdaddr_t) {{0, 0, 0, 0xff, 0xff, 0xff}})
168
169 /* Copy, swap, convert BD Address */
bacmp(bdaddr_t * ba1,bdaddr_t * ba2)170 static inline int bacmp(bdaddr_t *ba1, bdaddr_t *ba2)
171 {
172 return memcmp(ba1, ba2, sizeof(bdaddr_t));
173 }
bacpy(bdaddr_t * dst,bdaddr_t * src)174 static inline void bacpy(bdaddr_t *dst, bdaddr_t *src)
175 {
176 memcpy(dst, src, sizeof(bdaddr_t));
177 }
178
179 void baswap(bdaddr_t *dst, bdaddr_t *src);
180 char *batostr(bdaddr_t *ba);
181 bdaddr_t *strtoba(char *str);
182
183 /* Common socket structures and functions */
184
185 #define bt_sk(__sk) ((struct bt_sock *) __sk)
186
187 struct bt_sock {
188 struct sock sk;
189 bdaddr_t src;
190 bdaddr_t dst;
191 struct list_head accept_q;
192 struct sock *parent;
193 u32 defer_setup;
194 bool suspended;
195 };
196
197 struct bt_sock_list {
198 struct hlist_head head;
199 rwlock_t lock;
200 };
201
202 int bt_sock_register(int proto, const struct net_proto_family *ops);
203 int bt_sock_unregister(int proto);
204 void bt_sock_link(struct bt_sock_list *l, struct sock *s);
205 void bt_sock_unlink(struct bt_sock_list *l, struct sock *s);
206 int bt_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
207 struct msghdr *msg, size_t len, int flags);
208 int bt_sock_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
209 struct msghdr *msg, size_t len, int flags);
210 uint bt_sock_poll(struct file * file, struct socket *sock, poll_table *wait);
211 int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
212 int bt_sock_wait_state(struct sock *sk, int state, unsigned long timeo);
213
214 void bt_accept_enqueue(struct sock *parent, struct sock *sk);
215 void bt_accept_unlink(struct sock *sk);
216 struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
217
218 /* Skb helpers */
219 struct bt_skb_cb {
220 __u8 pkt_type;
221 __u8 incoming;
222 __u16 expect;
223 __u16 tx_seq;
224 __u8 retries;
225 __u8 sar;
226 __u8 force_active;
227 };
228 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
229
bt_skb_alloc(unsigned int len,gfp_t how)230 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
231 {
232 struct sk_buff *skb;
233
234 if ((skb = alloc_skb(len + BT_SKB_RESERVE, how))) {
235 skb_reserve(skb, BT_SKB_RESERVE);
236 bt_cb(skb)->incoming = 0;
237 }
238 return skb;
239 }
240
bt_skb_send_alloc(struct sock * sk,unsigned long len,int nb,int * err)241 static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
242 unsigned long len, int nb, int *err)
243 {
244 struct sk_buff *skb;
245
246 release_sock(sk);
247 if ((skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err))) {
248 skb_reserve(skb, BT_SKB_RESERVE);
249 bt_cb(skb)->incoming = 0;
250 }
251 lock_sock(sk);
252
253 if (!skb && *err)
254 return NULL;
255
256 *err = sock_error(sk);
257 if (*err)
258 goto out;
259
260 if (sk->sk_shutdown) {
261 *err = -ECONNRESET;
262 goto out;
263 }
264
265 return skb;
266
267 out:
268 kfree_skb(skb);
269 return NULL;
270 }
271
272 int bt_to_errno(__u16 code);
273
274 extern int hci_sock_init(void);
275 extern void hci_sock_cleanup(void);
276
277 extern int bt_sysfs_init(void);
278 extern void bt_sysfs_cleanup(void);
279
280 extern struct dentry *bt_debugfs;
281
282 int l2cap_init(void);
283 void l2cap_exit(void);
284
285 int sco_init(void);
286 void sco_exit(void);
287
288 void bt_sock_reclassify_lock(struct sock *sk, int proto);
289
290 #endif /* __BLUETOOTH_H */
291