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72 lines
2.3 KiB
72 lines
2.3 KiB
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/* Copyright (C) 2005 - 2010, Daniel Stenberg
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation for any purpose and without fee is hereby granted, provided
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* that the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of M.I.T. not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. M.I.T. makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*/
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#include "ares_setup.h"
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#include "ares.h"
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#include "ares_private.h"
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int ares_getsock(ares_channel channel,
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ares_socket_t *socks,
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int numsocks) /* size of the 'socks' array */
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{
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struct server_state *server;
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int i;
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int sockindex=0;
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int bitmap = 0;
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unsigned int setbits = 0xffffffff;
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/* Are there any active queries? */
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int active_queries = !ares__is_list_empty(&(channel->all_queries));
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for (i = 0;
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(i < channel->nservers) && (sockindex < ARES_GETSOCK_MAXNUM);
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i++)
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{
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server = &channel->servers[i];
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/* We only need to register interest in UDP sockets if we have
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* outstanding queries.
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*/
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if (active_queries && server->udp_socket != ARES_SOCKET_BAD)
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{
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if(sockindex >= numsocks)
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break;
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socks[sockindex] = server->udp_socket;
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bitmap |= ARES_GETSOCK_READABLE(setbits, sockindex);
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sockindex++;
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}
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/* We always register for TCP events, because we want to know
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* when the other side closes the connection, so we don't waste
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* time trying to use a broken connection.
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*/
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if (server->tcp_socket != ARES_SOCKET_BAD)
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{
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if(sockindex >= numsocks)
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break;
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socks[sockindex] = server->tcp_socket;
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bitmap |= ARES_GETSOCK_READABLE(setbits, sockindex);
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if (server->qhead && active_queries)
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/* then the tcp socket is also writable! */
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bitmap |= ARES_GETSOCK_WRITABLE(setbits, sockindex);
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sockindex++;
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}
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}
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return bitmap;
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}
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