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
|
/* $Id: ares_getsock.c,v 1.8 2009-11-02 11:55:53 yangtse Exp $ */
/* Copyright (C) 2005 - 2007, Daniel Stenberg
*
* 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.
*/
#include "ares_setup.h"
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include "ares.h"
#include "ares_private.h"
int ares_getsock(ares_channel channel,
int *s,
int numsocks) /* size of the 'socks' array */
{
struct server_state *server;
int i;
int sockindex=0;
int bitmap = 0;
unsigned int setbits = 0xffffffff;
ares_socket_t *socks = (ares_socket_t *)s;
/* Are there any active queries? */
int active_queries = !ares__is_list_empty(&(channel->all_queries));
for (i = 0;
(i < channel->nservers) && (sockindex < ARES_GETSOCK_MAXNUM);
i++)
{
server = &channel->servers[i];
/* We only need to register interest in UDP sockets if we have
* outstanding queries.
*/
if (active_queries && server->udp_socket != ARES_SOCKET_BAD)
{
if(sockindex >= numsocks)
break;
socks[sockindex] = server->udp_socket;
bitmap |= ARES_GETSOCK_READABLE(setbits, sockindex);
sockindex++;
}
/* We always register for TCP events, because we want to know
* when the other side closes the connection, so we don't waste
* time trying to use a broken connection.
*/
if (server->tcp_socket != ARES_SOCKET_BAD)
{
if(sockindex >= numsocks)
break;
socks[sockindex] = server->tcp_socket;
bitmap |= ARES_GETSOCK_READABLE(setbits, sockindex);
if (server->qhead && active_queries)
/* then the tcp socket is also writable! */
bitmap |= ARES_GETSOCK_WRITABLE(setbits, sockindex);
sockindex++;
}
}
return bitmap;
}
|
Swift