[openssh.git] / bsd-rresvport.c

/*
 * 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"

#ifndef HAVE_RRESVPORT_AF

#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$OpenBSD: rresvport.c,v 1.4 1999/12/17 20:48:03 deraadt Exp $";
#endif /* LIBC_SCCS and not lint */

#include "includes.h"

#if 0
int
rresvport(alport)
	int *alport;
{
	return rresvport_af(alport, AF_INET);
}
#endif

int
rresvport_af(alport, af)
	int *alport;
	int af;
{
	struct sockaddr_storage ss;
	struct sockaddr *sa;
	u_int16_t *portp;
	int s;
	int salen;

	bzero(&ss, 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);

	*portp = htons(*alport);
	if (*alport < IPPORT_RESERVED - 1) {
		if (bind(s, sa, salen) >= 0)
			return (s);
		if (errno != EADDRINUSE) {
			(void)close(s);
			return (-1);
		}
	}

	*portp = 0;
	if (bindresvport_af(s, sa, af) == -1) {
		(void)close(s);
		return (-1);
	}
	*alport = ntohs(*portp);
	return (s);
}

#endif /* HAVE_RRESVPORT_AF */
Commit	Line	Data
48e671d5	1	/*
	2	* Copyright (c) 1995, 1996, 1998 Theo de Raadt. All rights reserved.
	3	* Copyright (c) 1983, 1993, 1994
	4	* The Regents of the University of California. All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
	14	* 3. All advertising materials mentioning features or use of this software
	15	* must display the following acknowledgement:
	16	* This product includes software developed by the University of
	17	* California, Berkeley and its contributors.
	18	* This product includes software developed by Theo de Raadt.
	19	* 4. Neither the name of the University nor the names of its contributors
	20	* may be used to endorse or promote products derived from this software
	21	* without specific prior written permission.
	22	*
	23	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	24	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	25	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	26	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	27	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	28	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	29	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	30	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	31	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	32	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	33	* SUCH DAMAGE.
	34	*/
	35
	36	#include "config.h"
	37
	38	#ifndef HAVE_RRESVPORT_AF
	39
	40	#if defined(LIBC_SCCS) && !defined(lint)
	41	static char *rcsid = "$OpenBSD: rresvport.c,v 1.4 1999/12/17 20:48:03 deraadt Exp $";
	42	#endif /* LIBC_SCCS and not lint */
	43
	44	#include "includes.h"
	45
	46	#if 0
	47	int
	48	rresvport(alport)
	49	int *alport;
	50	{
	51	return rresvport_af(alport, AF_INET);
	52	}
	53	#endif
	54
	55	int
	56	rresvport_af(alport, af)
	57	int *alport;
	58	int af;
	59	{
	60	struct sockaddr_storage ss;
	61	struct sockaddr *sa;
	62	u_int16_t *portp;
	63	int s;
20af321f	64	int salen;
48e671d5	65
	66	bzero(&ss, sizeof ss);
	67	sa = (struct sockaddr *)&ss;
	68
	69	switch (af) {
	70	case AF_INET:
20af321f	71	salen = sizeof(struct sockaddr_in);
48e671d5	72	portp = &((struct sockaddr_in *)sa)->sin_port;
	73	break;
	74	case AF_INET6:
20af321f	75	salen = sizeof(struct sockaddr_in6);
48e671d5	76	portp = &((struct sockaddr_in6 *)sa)->sin6_port;
	77	break;
	78	default:
	79	errno = EPFNOSUPPORT;
	80	return (-1);
	81	}
	82	sa->sa_family = af;
	83
	84	s = socket(af, SOCK_STREAM, 0);
	85	if (s < 0)
	86	return (-1);
	87
	88	portp = htons(alport);
	89	if (*alport < IPPORT_RESERVED - 1) {
20af321f	90	if (bind(s, sa, salen) >= 0)
48e671d5	91	return (s);
	92	if (errno != EADDRINUSE) {
	93	(void)close(s);
	94	return (-1);
	95	}
	96	}
	97
	98	*portp = 0;
	99	if (bindresvport_af(s, sa, af) == -1) {
	100	(void)close(s);
	101	return (-1);
	102	}
	103	alport = ntohs(portp);
	104	return (s);
	105	}
	106
	107	#endif /* HAVE_RRESVPORT_AF */