74 lines
2.8 KiB
C
74 lines
2.8 KiB
C
|
/* $NetBSD: getport.c,v 1.1 2004/10/16 02:03:54 christos Exp $ */
|
||
|
|
|
||
|
|
/*-
|
||
|
|
* Copyright (c) 2004 The NetBSD Foundation, Inc.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
||
|
|
* by Christos Zoulas.
|
||
|
|
*
|
||
|
|
* 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 NetBSD
|
||
|
|
* Foundation, Inc. and its contributors.
|
||
|
|
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 <sys/cdefs.h>
|
||
|
|
__RCSID("$NetBSD: getport.c,v 1.1 2004/10/16 02:03:54 christos Exp $");
|
||
|
|
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <err.h>
|
||
|
|
#include <netdb.h>
|
||
|
|
#include <limits.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <netinet/in.h>
|
||
|
|
|
||
|
|
#include "getport.h"
|
||
|
|
|
||
|
|
struct servent *
|
||
|
|
getport(const char *service, const char *protocol)
|
||
|
|
{
|
||
|
|
long port;
|
||
|
|
char *ep;
|
||
|
|
struct servent *sp = getservbyname(service, protocol);
|
||
|
|
if (sp != NULL)
|
||
|
|
return sp;
|
||
|
|
|
||
|
|
if ((sp = calloc(1, sizeof(*sp))) == NULL)
|
||
|
|
err(1, "malloc");
|
||
|
|
sp->s_name = __UNCONST(service);
|
||
|
|
sp->s_proto = __UNCONST(protocol);
|
||
|
|
port = strtol(service, &ep, 0);
|
||
|
|
if ((service[0] != '\0' && *ep != '\0') ||
|
||
|
|
(errno == ERANGE &&
|
||
|
|
(port == LONG_MAX || port == LONG_MIN)) ||
|
||
|
|
(port <= 0 || port >= IPPORT_ANONMAX))
|
||
|
|
errx(1,"port must be between 1 and %d",
|
||
|
|
IPPORT_ANONMAX);
|
||
|
|
sp->s_port = htons((uint16_t)port);
|
||
|
|
return sp;
|
||
|
|
}
|