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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* BIRD Socket Interface
*
* (c) 1998--1999 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_SOCKET_H_
#define _BIRD_SOCKET_H_
#include "lib/resource.h"
typedef struct birdsock {
resource r;
pool *pool; /* Pool for socket data */
int type; /* Socket type */
void *data; /* User data */
ip_addr saddr, daddr; /* IPA_NONE = unspecified */
unsigned sport, dport; /* 0 = unspecified (for IP: protocol type) */
int tos; /* TOS and priority, -1 = default */
int ttl; /* Time To Live, -1 = default */
struct iface *iface; /* Interface; specify this for broad/multicast sockets */
byte *rbuf, *rpos; /* NULL=allocate automatically */
unsigned rbsize;
int (*rx_hook)(struct birdsock *, int size); /* NULL=receiving turned off, returns 1 to clear rx buffer */
byte *tbuf, *tpos; /* NULL=allocate automatically */
byte *ttx; /* Internal */
unsigned tbsize;
void (*tx_hook)(struct birdsock *);
void (*err_hook)(struct birdsock *, int); /* errno or zero if EOF */
ip_addr faddr; /* For packet protocols: source of current packet */
unsigned fport;
int fd; /* System-dependent data */
node n;
int entered;
} sock;
sock *sk_new(pool *); /* Allocate new socket */
int sk_open(sock *); /* Open socket */
void sk_close(sock *); /* Safe close of socket even from socket hook */
int sk_send(sock *, unsigned len); /* Send data, <0=err, >0=ok, 0=sleep */
int sk_send_to(sock *, unsigned len, ip_addr to, unsigned port); /* sk_send to given destination */
void sk_dump_all(void);
static inline int
sk_send_buffer_empty(sock *sk)
{
return sk->tbuf == sk->tpos;
}
/*
* Socket types SA SP DA DP IF TTL SendTo (?=may, -=must not, *=must)
*/
#define SK_TCP_PASSIVE 0 /* ? * - - - ? - */
#define SK_TCP_ACTIVE 1 /* ? ? * * - ? - */
#define SK_TCP 2
#define SK_UDP 3 /* ? ? - - - ? ? */
#define SK_UDP_MC 4 /* ? ? * * * * - */
#define SK_IP 5 /* ? - - * - ? ? */
#define SK_IP_MC 6 /* ? - * * * * - */
#define SK_MAGIC 7 /* Internal use by sysdep code */
#define SK_UNIX_PASSIVE 8
#define SK_UNIX 9
#define SK_DELETED 10 /* Internal use by sk_close */
/*
* Multicast sockets are slightly different from the other ones:
* If you want to send packets only, just set the destination
* address to the corresponding multicast group and iface to
* the interface to be used. If you also want receiving, set
* source address to the same multicast group as well.
*/
#endif
|
