76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* $Id$ */
|
|
|
|
/* 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 "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;
|
|
}
|