[openssh.git] / openbsd-compat / 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. 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.
 */

/* OPENBSD ORIGINAL: lib/libc/net/rresvport.c */

#include "includes.h"

#ifndef HAVE_RRESVPORT_AF

#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$OpenBSD: rresvport.c,v 1.6 2003/06/03 02:11:35 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(int *alport, sa_family_t af)
{
	struct sockaddr_storage ss;
	struct sockaddr *sa;
	u_int16_t *portp;
	int s;
	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);

	*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;
	sa->sa_family = af;
	if (bindresvport_sa(s, sa) == -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.
3e67f7df	14	* 3. Neither the name of the University nor the names of its contributors
48e671d5	15	* may be used to endorse or promote products derived from this software
	16	* without specific prior written permission.
	17	*
	18	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	19	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	20	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	21	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	22	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	23	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	24	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	25	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	26	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	27	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	28	* SUCH DAMAGE.
	29	*/
	30
f6d4fb87	31	/* OPENBSD ORIGINAL: lib/libc/net/rresvport.c */
f6d4fb87	32
17962c40	33	#include "includes.h"
48e671d5	34
	35	#ifndef HAVE_RRESVPORT_AF
	36
	37	#if defined(LIBC_SCCS) && !defined(lint)
3e67f7df	38	static char *rcsid = "$OpenBSD: rresvport.c,v 1.6 2003/06/03 02:11:35 deraadt Exp $";
48e671d5	39	#endif /* LIBC_SCCS and not lint */
	40
	41	#include "includes.h"
	42
	43	#if 0
	44	int
	45	rresvport(alport)
	46	int *alport;
	47	{
	48	return rresvport_af(alport, AF_INET);
	49	}
	50	#endif
	51
ec90a7d6	52	int
ec90a7d6	53	rresvport_af(int *alport, sa_family_t af)
48e671d5	54	{
	55	struct sockaddr_storage ss;
	56	struct sockaddr *sa;
	57	u_int16_t *portp;
	58	int s;
f1c4659d	59	socklen_t salen;
48e671d5	60
c193d002	61	memset(&ss, '\0', sizeof ss);
48e671d5	62	sa = (struct sockaddr *)&ss;
	63
	64	switch (af) {
	65	case AF_INET:
20af321f	66	salen = sizeof(struct sockaddr_in);
48e671d5	67	portp = &((struct sockaddr_in *)sa)->sin_port;
	68	break;
	69	case AF_INET6:
20af321f	70	salen = sizeof(struct sockaddr_in6);
48e671d5	71	portp = &((struct sockaddr_in6 *)sa)->sin6_port;
	72	break;
	73	default:
	74	errno = EPFNOSUPPORT;
	75	return (-1);
	76	}
	77	sa->sa_family = af;
	78
	79	s = socket(af, SOCK_STREAM, 0);
	80	if (s < 0)
	81	return (-1);
	82
	83	portp = htons(alport);
	84	if (*alport < IPPORT_RESERVED - 1) {
20af321f	85	if (bind(s, sa, salen) >= 0)
48e671d5	86	return (s);
	87	if (errno != EADDRINUSE) {
	88	(void)close(s);
	89	return (-1);
	90	}
	91	}
	92
	93	*portp = 0;
d7d5f0b2	94	sa->sa_family = af;
d7d5f0b2	95	if (bindresvport_sa(s, sa) == -1) {
48e671d5	96	(void)close(s);
	97	return (-1);
	98	}
	99	alport = ntohs(portp);
	100	return (s);
	101	}
	102
	103	#endif /* HAVE_RRESVPORT_AF */