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

/* This file has be modified from the original OpenBSD source */

/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user.
 * 
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 * 
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 * 
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 * 
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 * 
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */

#include "includes.h"

#ifndef HAVE_BINDRESVPORT_SA

#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$OpenBSD: bindresvport.c,v 1.13 2000/01/26 03:43:21 deraadt Exp $";
#endif /* LIBC_SCCS and not lint */

/*
 * Copyright (c) 1987 by Sun Microsystems, Inc.
 *
 * Portions Copyright(C) 1996, Jason Downs.  All rights reserved.
 */

#include "includes.h"

#define STARTPORT 600
#define ENDPORT (IPPORT_RESERVED - 1)
#define NPORTS	(ENDPORT - STARTPORT + 1)

/*
 * Bind a socket to a privileged IP port
 */
int
bindresvport_sa(sd, sa)
	int sd;
	struct sockaddr *sa;
{
	int error, af;
	struct sockaddr_storage myaddr;
	struct sockaddr_in *sin;
	struct sockaddr_in6 *sin6;
	u_int16_t *portp;
	u_int16_t port;
	socklen_t salen;
	int i;

	if (sa == NULL) {
		memset(&myaddr, 0, sizeof(myaddr));
		sa = (struct sockaddr *)&myaddr;

		if (getsockname(sd, sa, &salen) == -1)
			return -1;	/* errno is correctly set */

		af = sa->sa_family;
		memset(&myaddr, 0, salen);
	} else
		af = sa->sa_family;

	if (af == AF_INET) {
		sin = (struct sockaddr_in *)sa;
		salen = sizeof(struct sockaddr_in);
		portp = &sin->sin_port;
	} else if (af == AF_INET6) {
		sin6 = (struct sockaddr_in6 *)sa;
		salen = sizeof(struct sockaddr_in6);
		portp = &sin6->sin6_port;
	} else {
		errno = EPFNOSUPPORT;
		return (-1);
	}
	sa->sa_family = af;

	port = ntohs(*portp);
	if (port == 0)
		port = (arc4random() % NPORTS) + STARTPORT;

	/* Avoid warning */
	error = -1;

	for(i = 0; i < NPORTS; i++) {
		*portp = htons(port);
		
		error = bind(sd, sa, salen);

		/* Terminate on success */
		if (error == 0)
			break;
			
		/* Terminate on errors, except "address already in use" */
		if ((error < 0) && !((errno == EADDRINUSE) || (errno == EINVAL)))
			break;
			
		port++;
		if (port > ENDPORT)
			port = STARTPORT;
	}

	return (error);
}

#endif /* HAVE_BINDRESVPORT_SA */
Commit	Line	Data
d7d5f0b2	1	/* This file has be modified from the original OpenBSD source */
d7d5f0b2	2
48e671d5	3	/*
	4	* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
	5	* unrestricted use provided that this legend is included on all tape
	6	* media and as a part of the software program in whole or part. Users
	7	* may copy or modify Sun RPC without charge, but are not authorized
	8	* to license or distribute it to anyone else except as part of a product or
	9	* program developed by the user.
	10	*
	11	* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
	12	* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
	13	* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
	14	*
	15	* Sun RPC is provided with no support and without any obligation on the
	16	* part of Sun Microsystems, Inc. to assist in its use, correction,
	17	* modification or enhancement.
	18	*
	19	* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
	20	* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
	21	* OR ANY PART THEREOF.
	22	*
	23	* In no event will Sun Microsystems, Inc. be liable for any lost revenue
	24	* or profits or other special, indirect and consequential damages, even if
	25	* Sun has been advised of the possibility of such damages.
	26	*
	27	* Sun Microsystems, Inc.
	28	* 2550 Garcia Avenue
	29	* Mountain View, California 94043
	30	*/
	31
17962c40	32	#include "includes.h"
48e671d5	33
d7d5f0b2	34	#ifndef HAVE_BINDRESVPORT_SA
48e671d5	35
48e671d5	36	#if defined(LIBC_SCCS) && !defined(lint)
d7d5f0b2	37	static char *rcsid = "$OpenBSD: bindresvport.c,v 1.13 2000/01/26 03:43:21 deraadt Exp $";
48e671d5	38	#endif /* LIBC_SCCS and not lint */
	39
	40	/*
	41	* Copyright (c) 1987 by Sun Microsystems, Inc.
	42	*
	43	* Portions Copyright(C) 1996, Jason Downs. All rights reserved.
	44	*/
	45
	46	#include "includes.h"
	47
	48	#define STARTPORT 600
	49	#define ENDPORT (IPPORT_RESERVED - 1)
	50	#define NPORTS (ENDPORT - STARTPORT + 1)
	51
48e671d5	52	/*
	53	* Bind a socket to a privileged IP port
	54	*/
	55	int
d7d5f0b2	56	bindresvport_sa(sd, sa)
48e671d5	57	int sd;
48e671d5	58	struct sockaddr *sa;
48e671d5	59	{
d7d5f0b2	60	int error, af;
48e671d5	61	struct sockaddr_storage myaddr;
	62	struct sockaddr_in *sin;
	63	struct sockaddr_in6 *sin6;
	64	u_int16_t *portp;
1e64903d	65	u_int16_t port;
f1c4659d	66	socklen_t salen;
48e671d5	67	int i;
	68
	69	if (sa == NULL) {
	70	memset(&myaddr, 0, sizeof(myaddr));
	71	sa = (struct sockaddr *)&myaddr;
d7d5f0b2	72
	73	if (getsockname(sd, sa, &salen) == -1)
	74	return -1; /* errno is correctly set */
	75
	76	af = sa->sa_family;
	77	memset(&myaddr, 0, salen);
	78	} else
	79	af = sa->sa_family;
48e671d5	80
	81	if (af == AF_INET) {
	82	sin = (struct sockaddr_in *)sa;
	83	salen = sizeof(struct sockaddr_in);
	84	portp = &sin->sin_port;
	85	} else if (af == AF_INET6) {
	86	sin6 = (struct sockaddr_in6 *)sa;
	87	salen = sizeof(struct sockaddr_in6);
	88	portp = &sin6->sin6_port;
	89	} else {
	90	errno = EPFNOSUPPORT;
	91	return (-1);
	92	}
	93	sa->sa_family = af;
	94
1e64903d	95	port = ntohs(*portp);
	96	if (port == 0)
	97	port = (arc4random() % NPORTS) + STARTPORT;
48e671d5	98
717057b6	99	/* Avoid warning */
	100	error = -1;
	101
48e671d5	102	for(i = 0; i < NPORTS; i++) {
1e64903d	103	*portp = htons(port);
1e64903d	104
48e671d5	105	error = bind(sd, sa, salen);
d7d5f0b2	106
f914c7fb	107	/* Terminate on success */
	108	if (error == 0)
	109	break;
	110
	111	/* Terminate on errors, except "address already in use" */
f4a7cf29	112	if ((error < 0) && !((errno == EADDRINUSE) \|\| (errno == EINVAL)))
48e671d5	113	break;
48e671d5	114
1e64903d	115	port++;
	116	if (port > ENDPORT)
	117	port = STARTPORT;
48e671d5	118	}
	119
	120	return (error);
	121	}
	122
d7d5f0b2	123	#endif /* HAVE_BINDRESVPORT_SA */