kamailio/sock_ut.c

/* 
 * $Id$
 * 
 * Copyright (C) 2010 iptelorg GmbH
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
/** various socket related functions.
 * @file sock_ut.c
 * @ingroup: core 
 */
/*
 * History:
 * --------
 *  2010-08-09  initial version (andrei)
*/

#include "sock_ut.h"

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <errno.h>
#include <arpa/inet.h>


/** get the IP TTL.
 * @return ttl on success, < 0 on error
 */
int sock_get_ttl(int sock)
{
	int ioptval;
	unsigned int ioptvallen;

	ioptvallen=sizeof(ioptval);
	if (getsockopt( sock, IPPROTO_IP, IP_TTL, (void*) &ioptval,
		    &ioptvallen) == -1 )
	{
		return -1;
	}
	return ioptval;
}



/** set the IP TTL on a socket.
 * @return ttl on success, < 0 on error
 */
int sock_set_ttl(int sock, int ttl)
{
	int ioptval;

	if (setsockopt( sock, IPPROTO_IP, IP_TTL, (void*) &ioptval,
					sizeof(ioptval)) == -1 )
		return -1;
	return ioptval;
}

/* vi: set ts=4 sw=4 tw=79:ai:cindent: */