[openssh.git] / openbsd-compat / rresvport.c

/* $OpenBSD: rresvport.c,v 1.9 2005/11/10 10:00:17 espie Exp $ */
/*
 * 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

#include <sys/types.h>
#include <sys/socket.h>

#include <netinet/in.h>
#include <arpa/inet.h>

#include <errno.h>
#include <stdlib.h>
#include <string.h>

#if 0
int
rresvport(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
f97dc218	1	/* $OpenBSD: rresvport.c,v 1.9 2005/11/10 10:00:17 espie Exp $ */
48e671d5	2	/*
	3	* Copyright (c) 1995, 1996, 1998 Theo de Raadt. All rights reserved.
	4	* Copyright (c) 1983, 1993, 1994
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
3e67f7df	15	* 3. Neither the name of the University nor the names of its contributors
48e671d5	16	* may be used to endorse or promote products derived from this software
	17	* without specific prior written permission.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	20	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	21	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	22	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	23	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	24	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	25	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	26	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	27	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	28	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	29	* SUCH DAMAGE.
	30	*/
	31
f6d4fb87	32	/* OPENBSD ORIGINAL: lib/libc/net/rresvport.c */
f6d4fb87	33
17962c40	34	#include "includes.h"
48e671d5	35
	36	#ifndef HAVE_RRESVPORT_AF
	37
aa751414	38	#include <sys/types.h>
	39	#include <sys/socket.h>
	40
	41	#include <netinet/in.h>
5e837c7b	42	#include <arpa/inet.h>
aa751414	43
4f4b7d4d	44	#include <errno.h>
e429fba8	45	#include <stdlib.h>
e204f3ee	46	#include <string.h>
4f4b7d4d	47
48e671d5	48	#if 0
48e671d5	49	int
8c603515	50	rresvport(int *alport)
48e671d5	51	{
	52	return rresvport_af(alport, AF_INET);
	53	}
	54	#endif
	55
8c603515	56	int
ec90a7d6	57	rresvport_af(int *alport, sa_family_t af)
48e671d5	58	{
	59	struct sockaddr_storage ss;
	60	struct sockaddr *sa;
	61	u_int16_t *portp;
	62	int s;
f1c4659d	63	socklen_t salen;
48e671d5	64
c193d002	65	memset(&ss, '\0', sizeof ss);
48e671d5	66	sa = (struct sockaddr *)&ss;
	67
	68	switch (af) {
	69	case AF_INET:
20af321f	70	salen = sizeof(struct sockaddr_in);
48e671d5	71	portp = &((struct sockaddr_in *)sa)->sin_port;
	72	break;
	73	case AF_INET6:
20af321f	74	salen = sizeof(struct sockaddr_in6);
48e671d5	75	portp = &((struct sockaddr_in6 *)sa)->sin6_port;
	76	break;
	77	default:
	78	errno = EPFNOSUPPORT;
	79	return (-1);
	80	}
	81	sa->sa_family = af;
	82
	83	s = socket(af, SOCK_STREAM, 0);
	84	if (s < 0)
	85	return (-1);
	86
	87	portp = htons(alport);
	88	if (*alport < IPPORT_RESERVED - 1) {
20af321f	89	if (bind(s, sa, salen) >= 0)
48e671d5	90	return (s);
	91	if (errno != EADDRINUSE) {
	92	(void)close(s);
	93	return (-1);
	94	}
	95	}
	96
	97	*portp = 0;
d7d5f0b2	98	sa->sa_family = af;
d7d5f0b2	99	if (bindresvport_sa(s, sa) == -1) {
48e671d5	100	(void)close(s);
	101	return (-1);
	102	}
	103	alport = ntohs(portp);
	104	return (s);
	105	}
	106
	107	#endif /* HAVE_RRESVPORT_AF */