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
|
/* Copyright 1998 by the Massachusetts Institute of Technology.
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting
* documentation, and that the name of M.I.T. not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is"
* without express or implied warranty.
*/
static const char rcsid[] = "$Id$";
#include <sys/types.h>
#ifdef WIN32
#else
#include <sys/time.h>
#endif
#include "ares.h"
#include "ares_private.h"
int ares_fds(ares_channel channel, fd_set *read_fds, fd_set *write_fds)
{
struct server_state *server;
int i, nfds;
/* No queries, no file descriptors. */
if (!channel->queries)
return 0;
nfds = 0;
for (i = 0; i < channel->nservers; i++)
{
server = &channel->servers[i];
if (server->udp_socket != -1)
{
FD_SET(server->udp_socket, read_fds);
if (server->udp_socket >= nfds)
nfds = server->udp_socket + 1;
}
if (server->tcp_socket != -1)
{
FD_SET(server->tcp_socket, read_fds);
if (server->qhead)
FD_SET(server->tcp_socket, write_fds);
if (server->tcp_socket >= nfds)
nfds = server->tcp_socket + 1;
}
}
return nfds;
}
|
