1*f14fb602SLionel Sambuc /* $NetBSD: getservbyname_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[] = "@(#)getservbyname.c 8.1 (Berkeley) 6/4/93";
362fe8fb19SBen Gras #else
37*f14fb602SLionel Sambuc __RCSID("$NetBSD: getservbyname_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 <assert.h>
432fe8fb19SBen Gras #include <cdbr.h>
442fe8fb19SBen Gras #include <netdb.h>
452fe8fb19SBen Gras #include <stdlib.h>
462fe8fb19SBen Gras #include <string.h>
472fe8fb19SBen Gras
482fe8fb19SBen Gras #include "servent.h"
492fe8fb19SBen Gras
502fe8fb19SBen Gras #ifdef __weak_alias
__weak_alias(getservbyname_r,_getservbyname_r)512fe8fb19SBen Gras __weak_alias(getservbyname_r,_getservbyname_r)
522fe8fb19SBen Gras #endif
532fe8fb19SBen Gras
542fe8fb19SBen Gras static struct servent *
552fe8fb19SBen Gras _servent_getbyname(struct servent_data *sd, struct servent *sp,
562fe8fb19SBen Gras const char *name, const char *proto)
572fe8fb19SBen Gras {
582fe8fb19SBen Gras
592fe8fb19SBen Gras if ((sd->flags & (_SV_CDB | _SV_PLAINFILE)) == 0)
602fe8fb19SBen Gras return NULL;
612fe8fb19SBen Gras
622fe8fb19SBen Gras if (sd->flags & _SV_CDB) {
632fe8fb19SBen Gras uint8_t buf[255 * 2 + 2];
642fe8fb19SBen Gras size_t namelen, protolen;
652fe8fb19SBen Gras const uint8_t *data, *data_end;
662fe8fb19SBen Gras const void *data_ptr;
672fe8fb19SBen Gras size_t datalen;
682fe8fb19SBen Gras
692fe8fb19SBen Gras namelen = strlen(name);
702fe8fb19SBen Gras if (namelen == 0 || namelen > 255)
712fe8fb19SBen Gras return NULL;
72*f14fb602SLionel Sambuc if (proto != NULL) {
732fe8fb19SBen Gras protolen = strlen(proto);
74*f14fb602SLionel Sambuc if (protolen == 0 || protolen > 255)
75*f14fb602SLionel Sambuc return NULL;
76*f14fb602SLionel Sambuc } else
772fe8fb19SBen Gras protolen = 0;
78*f14fb602SLionel Sambuc if (namelen + protolen > 255)
79*f14fb602SLionel Sambuc return NULL;
802fe8fb19SBen Gras
81*f14fb602SLionel Sambuc buf[0] = (uint8_t)namelen;
82*f14fb602SLionel Sambuc buf[1] = (uint8_t)protolen;
832fe8fb19SBen Gras memcpy(buf + 2, name, namelen);
842fe8fb19SBen Gras memcpy(buf + 2 + namelen, proto, protolen);
852fe8fb19SBen Gras
862fe8fb19SBen Gras if (cdbr_find(sd->cdb, buf, 2 + namelen + protolen,
872fe8fb19SBen Gras &data_ptr, &datalen))
882fe8fb19SBen Gras return NULL;
892fe8fb19SBen Gras
902fe8fb19SBen Gras if (datalen < namelen + protolen + 6)
912fe8fb19SBen Gras return NULL;
922fe8fb19SBen Gras
932fe8fb19SBen Gras data = data_ptr;
942fe8fb19SBen Gras data_end = data + datalen;
952fe8fb19SBen Gras if (protolen) {
962fe8fb19SBen Gras if (data[2] != protolen)
972fe8fb19SBen Gras return NULL;
982fe8fb19SBen Gras if (memcmp(data + 3, proto, protolen + 1))
992fe8fb19SBen Gras return NULL;
1002fe8fb19SBen Gras }
1012fe8fb19SBen Gras data += 3 + data[2] + 1;
1022fe8fb19SBen Gras if (data > data_end)
1032fe8fb19SBen Gras return NULL;
1042fe8fb19SBen Gras while (data != data_end) {
1052fe8fb19SBen Gras if (*data == '\0')
1062fe8fb19SBen Gras return NULL;
1072fe8fb19SBen Gras if (data + data[0] + 2 > data_end)
1082fe8fb19SBen Gras return NULL;
1092fe8fb19SBen Gras if (data[0] == namelen &&
1102fe8fb19SBen Gras memcmp(data + 1, name, namelen + 1) == 0)
1112fe8fb19SBen Gras return _servent_parsedb(sd, sp, data_ptr,
1122fe8fb19SBen Gras datalen);
1132fe8fb19SBen Gras data += data[0] + 2;
1142fe8fb19SBen Gras }
1152fe8fb19SBen Gras return NULL;
1162fe8fb19SBen Gras } else {
1172fe8fb19SBen Gras while (_servent_getline(sd) != -1) {
1182fe8fb19SBen Gras char **cp;
1192fe8fb19SBen Gras if (_servent_parseline(sd, sp) == NULL)
1202fe8fb19SBen Gras continue;
1212fe8fb19SBen Gras
1222fe8fb19SBen Gras if (strcmp(name, sp->s_name) == 0)
1232fe8fb19SBen Gras goto gotname;
1242fe8fb19SBen Gras
1252fe8fb19SBen Gras for (cp = sp->s_aliases; *cp; cp++)
1262fe8fb19SBen Gras if (strcmp(name, *cp) == 0)
1272fe8fb19SBen Gras goto gotname;
1282fe8fb19SBen Gras continue;
1292fe8fb19SBen Gras gotname:
1302fe8fb19SBen Gras if (proto == NULL || strcmp(sp->s_proto, proto) == 0)
1312fe8fb19SBen Gras return sp;
1322fe8fb19SBen Gras }
1332fe8fb19SBen Gras return NULL;
1342fe8fb19SBen Gras }
1352fe8fb19SBen Gras }
1362fe8fb19SBen Gras
1372fe8fb19SBen Gras struct servent *
getservbyname_r(const char * name,const char * proto,struct servent * sp,struct servent_data * sd)1382fe8fb19SBen Gras getservbyname_r(const char *name, const char *proto, struct servent *sp,
1392fe8fb19SBen Gras struct servent_data *sd)
1402fe8fb19SBen Gras {
1412fe8fb19SBen Gras _DIAGASSERT(name != NULL);
1422fe8fb19SBen Gras /* proto may be NULL */
1432fe8fb19SBen Gras
1442fe8fb19SBen Gras setservent_r(sd->flags & _SV_STAYOPEN, sd);
1452fe8fb19SBen Gras sp = _servent_getbyname(sd, sp, name, proto);
1462fe8fb19SBen Gras if (!(sd->flags & _SV_STAYOPEN))
1472fe8fb19SBen Gras _servent_close(sd);
1482fe8fb19SBen Gras return sp;
1492fe8fb19SBen Gras }
150