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/* net/connect4_timeout.c - Make an IPv4 connection with a timeout
* Copyright (C) 2004,2005 Bruce Guenter <bruce@untroubled.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "sysdeps.h"
#include <errno.h>
#include "socket.h"
#include "unix.h"
/** Connect a socket to an IPv4 address, honouring a timeout.
*
* \note The socket will have nonblocking mode turned on on return from
* this function. */
int socket_connect4_timeout(int sock, const ipv4addr* ip, ipv4port port,
int timeout)
{
iopoll_fd pf;
if (!nonblock_on(sock))
return 0;
if (socket_connect4(sock, ip, port))
return 1;
if (errno != EINPROGRESS && errno != EWOULDBLOCK)
return 0;
pf.fd = sock;
pf.events = IOPOLL_WRITE;
switch (iopoll_restart(&pf, 1, timeout)) {
case 0:
errno = ETIMEDOUT;
return 0;
case 1:
if (socket_connected(sock))
return 1;
/* No break, fall through */
default:
return 0;
}
}
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