NetBSD/lib/libc/net/getservbyport_r.c

106 lines
3.2 KiB
C

/* $NetBSD: getservbyport_r.c,v 1.5 2006/07/28 15:14:45 christos Exp $ */
/*
* Copyright (c) 1983, 1993
* 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.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)getservbyport.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: getservbyport_r.c,v 1.5 2006/07/28 15:14:45 christos Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <stdio.h>
#include <netdb.h>
#include <string.h>
#include <stdlib.h>
#include <db.h>
#include "servent.h"
#ifdef __weak_alias
__weak_alias(getservbyport_r,_getservbyport_r)
#endif
static struct servent *
_servent_getbyport(struct servent_data *sd, struct servent *sp, int port,
const char *proto)
{
if (sd->flags & _SV_DB) {
char buf[BUFSIZ];
DBT key, data;
DB *db = sd->db;
key.data = buf;
port = htons(port);
if (proto == NULL)
key.size = snprintf(buf, sizeof(buf), "\377%d", port);
else
key.size = snprintf(buf, sizeof(buf), "\377%d/%s", port,
proto);
key.size++;
if ((*db->get)(db, &key, &data, 0) != 0)
return NULL;
if ((*db->get)(db, &data, &key, 0) != 0)
return NULL;
if (sd->line)
free(sd->line);
sd->line = strdup(key.data);
return _servent_parseline(sd, sp);
} else {
while (_servent_getline(sd) != -1) {
if (_servent_parseline(sd, sp) == NULL)
continue;
if (sp->s_port != port)
continue;
if (proto == NULL || strcmp(sp->s_proto, proto) == 0)
return sp;
}
return NULL;
}
}
struct servent *
getservbyport_r(int port, const char *proto, struct servent *sp,
struct servent_data *sd)
{
setservent_r(sd->flags & _SV_STAYOPEN, sd);
sp = _servent_getbyport(sd, sp, port, proto);
if (!(sd->flags & _SV_STAYOPEN))
_servent_close(sd);
return sp;
}