106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/* $NetBSD: getservbyport_r.c,v 1.5 2006/07/28 15:14:45 christos Exp $ */
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/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)getservbyport.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: getservbyport_r.c,v 1.5 2006/07/28 15:14:45 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <stdio.h>
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#include <netdb.h>
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#include <string.h>
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#include <stdlib.h>
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#include <db.h>
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#include "servent.h"
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#ifdef __weak_alias
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__weak_alias(getservbyport_r,_getservbyport_r)
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#endif
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static struct servent *
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_servent_getbyport(struct servent_data *sd, struct servent *sp, int port,
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const char *proto)
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{
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if (sd->flags & _SV_DB) {
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char buf[BUFSIZ];
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DBT key, data;
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DB *db = sd->db;
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key.data = buf;
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port = htons(port);
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if (proto == NULL)
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key.size = snprintf(buf, sizeof(buf), "\377%d", port);
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else
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key.size = snprintf(buf, sizeof(buf), "\377%d/%s", port,
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proto);
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key.size++;
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if ((*db->get)(db, &key, &data, 0) != 0)
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return NULL;
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if ((*db->get)(db, &data, &key, 0) != 0)
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return NULL;
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if (sd->line)
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free(sd->line);
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sd->line = strdup(key.data);
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return _servent_parseline(sd, sp);
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} else {
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while (_servent_getline(sd) != -1) {
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if (_servent_parseline(sd, sp) == NULL)
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continue;
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if (sp->s_port != port)
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continue;
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if (proto == NULL || strcmp(sp->s_proto, proto) == 0)
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return sp;
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}
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return NULL;
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}
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}
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struct servent *
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getservbyport_r(int port, const char *proto, struct servent *sp,
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struct servent_data *sd)
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{
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setservent_r(sd->flags & _SV_STAYOPEN, sd);
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sp = _servent_getbyport(sd, sp, port, proto);
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if (!(sd->flags & _SV_STAYOPEN))
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_servent_close(sd);
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return sp;
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}
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