1*f14fb602SLionel Sambuc /* $NetBSD: getservbyport_r.c,v 1.9 2012/03/13 21:13:41 christos Exp $ */
22fe8fb19SBen Gras
32fe8fb19SBen Gras /*
42fe8fb19SBen Gras * Copyright (c) 1983, 1993
52fe8fb19SBen Gras * The Regents of the University of California. All rights reserved.
62fe8fb19SBen Gras *
72fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without
82fe8fb19SBen Gras * modification, are permitted provided that the following conditions
92fe8fb19SBen Gras * are met:
102fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright
112fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer.
122fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright
132fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the
142fe8fb19SBen Gras * documentation and/or other materials provided with the distribution.
152fe8fb19SBen Gras * 3. Neither the name of the University nor the names of its contributors
162fe8fb19SBen Gras * may be used to endorse or promote products derived from this software
172fe8fb19SBen Gras * without specific prior written permission.
182fe8fb19SBen Gras *
192fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
202fe8fb19SBen Gras * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
212fe8fb19SBen Gras * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
222fe8fb19SBen Gras * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
232fe8fb19SBen Gras * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
242fe8fb19SBen Gras * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
252fe8fb19SBen Gras * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
262fe8fb19SBen Gras * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
272fe8fb19SBen Gras * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
282fe8fb19SBen Gras * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
292fe8fb19SBen Gras * SUCH DAMAGE.
302fe8fb19SBen Gras */
312fe8fb19SBen Gras
322fe8fb19SBen Gras #include <sys/cdefs.h>
332fe8fb19SBen Gras #if defined(LIBC_SCCS) && !defined(lint)
342fe8fb19SBen Gras #if 0
352fe8fb19SBen Gras static char sccsid[] = "@(#)getservbyport.c 8.1 (Berkeley) 6/4/93";
362fe8fb19SBen Gras #else
37*f14fb602SLionel Sambuc __RCSID("$NetBSD: getservbyport_r.c,v 1.9 2012/03/13 21:13:41 christos Exp $");
382fe8fb19SBen Gras #endif
392fe8fb19SBen Gras #endif /* LIBC_SCCS and not lint */
402fe8fb19SBen Gras
412fe8fb19SBen Gras #include "namespace.h"
422fe8fb19SBen Gras #include <cdbr.h>
432fe8fb19SBen Gras #include <netdb.h>
442fe8fb19SBen Gras #include <string.h>
452fe8fb19SBen Gras #include <stdlib.h>
462fe8fb19SBen Gras
472fe8fb19SBen Gras #include "servent.h"
482fe8fb19SBen Gras
492fe8fb19SBen Gras #ifdef __weak_alias
__weak_alias(getservbyport_r,_getservbyport_r)502fe8fb19SBen Gras __weak_alias(getservbyport_r,_getservbyport_r)
512fe8fb19SBen Gras #endif
522fe8fb19SBen Gras
532fe8fb19SBen Gras static struct servent *
542fe8fb19SBen Gras _servent_getbyport(struct servent_data *sd, struct servent *sp, int port,
552fe8fb19SBen Gras const char *proto)
562fe8fb19SBen Gras {
572fe8fb19SBen Gras
582fe8fb19SBen Gras if ((sd->flags & (_SV_CDB | _SV_PLAINFILE)) == 0)
592fe8fb19SBen Gras return NULL;
602fe8fb19SBen Gras
612fe8fb19SBen Gras if (sd->flags & _SV_CDB) {
622fe8fb19SBen Gras uint8_t buf[255 + 4];
632fe8fb19SBen Gras size_t protolen;
642fe8fb19SBen Gras const uint8_t *data;
652fe8fb19SBen Gras const void *data_ptr;
662fe8fb19SBen Gras size_t datalen;
672fe8fb19SBen Gras
682fe8fb19SBen Gras port = be16toh(port);
692fe8fb19SBen Gras
70*f14fb602SLionel Sambuc if (proto != NULL) {
712fe8fb19SBen Gras protolen = strlen(proto);
72*f14fb602SLionel Sambuc if (protolen == 0 || protolen > 255)
73*f14fb602SLionel Sambuc return NULL;
74*f14fb602SLionel Sambuc } else
752fe8fb19SBen Gras protolen = 0;
762fe8fb19SBen Gras if (port < 0 || port > 65536)
772fe8fb19SBen Gras return NULL;
782fe8fb19SBen Gras
792fe8fb19SBen Gras buf[0] = 0;
80*f14fb602SLionel Sambuc buf[1] = (uint8_t)protolen;
812fe8fb19SBen Gras be16enc(buf + 2, port);
822fe8fb19SBen Gras memcpy(buf + 4, proto, protolen);
832fe8fb19SBen Gras
842fe8fb19SBen Gras if (cdbr_find(sd->cdb, buf, 4 + protolen,
852fe8fb19SBen Gras &data_ptr, &datalen))
862fe8fb19SBen Gras return NULL;
872fe8fb19SBen Gras
882fe8fb19SBen Gras if (datalen < protolen + 4)
892fe8fb19SBen Gras return NULL;
902fe8fb19SBen Gras
912fe8fb19SBen Gras data = data_ptr;
922fe8fb19SBen Gras if (be16dec(data) != port)
932fe8fb19SBen Gras return NULL;
942fe8fb19SBen Gras if (protolen) {
952fe8fb19SBen Gras if (data[2] != protolen)
962fe8fb19SBen Gras return NULL;
972fe8fb19SBen Gras if (memcmp(data + 3, proto, protolen + 1))
982fe8fb19SBen Gras return NULL;
992fe8fb19SBen Gras }
1002fe8fb19SBen Gras return _servent_parsedb(sd, sp, data, datalen);
1012fe8fb19SBen Gras } else {
1022fe8fb19SBen Gras while (_servent_getline(sd) != -1) {
1032fe8fb19SBen Gras if (_servent_parseline(sd, sp) == NULL)
1042fe8fb19SBen Gras continue;
1052fe8fb19SBen Gras if (sp->s_port != port)
1062fe8fb19SBen Gras continue;
1072fe8fb19SBen Gras if (proto == NULL || strcmp(sp->s_proto, proto) == 0)
1082fe8fb19SBen Gras return sp;
1092fe8fb19SBen Gras }
1102fe8fb19SBen Gras return NULL;
1112fe8fb19SBen Gras }
1122fe8fb19SBen Gras }
1132fe8fb19SBen Gras
1142fe8fb19SBen Gras struct servent *
getservbyport_r(int port,const char * proto,struct servent * sp,struct servent_data * sd)1152fe8fb19SBen Gras getservbyport_r(int port, const char *proto, struct servent *sp,
1162fe8fb19SBen Gras struct servent_data *sd)
1172fe8fb19SBen Gras {
1182fe8fb19SBen Gras setservent_r(sd->flags & _SV_STAYOPEN, sd);
1192fe8fb19SBen Gras sp = _servent_getbyport(sd, sp, port, proto);
1202fe8fb19SBen Gras if (!(sd->flags & _SV_STAYOPEN))
1212fe8fb19SBen Gras _servent_close(sd);
1222fe8fb19SBen Gras return sp;
1232fe8fb19SBen Gras }
124