1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
#ifndef _STUN_H_
#define _STUN_H_
#include <string.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include "compat.h"
#include "call.h"
#include "str.h"
#include "socket.h"
#define STUN_COOKIE 0x2112A442UL
struct stun_attrs {
str username;
char *msg_integrity_attr;
str msg_integrity;
uint32_t priority;
char *fingerprint_attr;
uint32_t fingerprint;
uint64_t tiebreaker;
endpoint_t mapped;
unsigned int error_code;
unsigned int use:1,
controlled:1,
controlling:1;
};
INLINE int is_stun(const str *s) {
const unsigned char *b = (const void *) s->s;
const uint32_t *u;
if (s->len < 20)
return 0;
if ((b[0] & 0xc0) != 0x00)
return 0;
if ((b[3] & 0x3) != 0x0)
return 0;
u = (const void *) &b[4];
if (*u != htonl(STUN_COOKIE))
return 0;
return 1;
}
int stun(const str *, stream_fd *, const endpoint_t *);
int stun_binding_request(const endpoint_t *dst, uint32_t transaction[3], str *pwd,
str ufrags[2], int controlling, uint64_t tiebreaker, uint32_t priority,
socket_t *, int);
#endif
|
