/*
 * Copyright (c) 1995, 1996, 1998 Theo de Raadt.  All rights reserved.
 * Copyright (c) 1983, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 *	This product includes software developed by Theo de Raadt.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "config.h"


#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$OpenBSD: rresvport.c,v 1.5 2000/01/26 03:43:20 deraadt Exp $";
#endif /* LIBC_SCCS and not lint */

#include "includes.h"


int 
my_rresvport_af(int *alport, sa_family_t af)
{
	struct sockaddr_storage ss;
	struct sockaddr *sa;
	u_int16_t *portp;
	int s, one = 1, len = sizeof(int), i = 0;
	socklen_t salen;


	memset(&ss, '\0', sizeof ss);
	sa = (struct sockaddr *)&ss;

	switch (af) {
	case AF_INET:
		salen = sizeof(struct sockaddr_in);
		portp = &((struct sockaddr_in *)sa)->sin_port;
		break;
	case AF_INET6:
		salen = sizeof(struct sockaddr_in6);
		portp = &((struct sockaddr_in6 *)sa)->sin6_port;
		break;
	default:
		errno = EPFNOSUPPORT;
		return (-1);
	}
	sa->sa_family = af;
	
	s = socket(af, SOCK_STREAM, 0);
	if (s < 0)
		return (-1);

	//setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, len);
	for (*portp = htons(*alport);; *portp = htons(*alport+i)) {
		++i;
		if (bind(s, sa, salen) == 0)
			break;
	}

	return (s);
}