f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/* $NetBSD: getservbyname_r.c,v 1.9 2012/03/13 21:13:41 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[] = "@(#)getservbyname.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: getservbyname_r.c,v 1.9 2012/03/13 21:13:41 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 <assert.h>
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#include <cdbr.h>
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#include <netdb.h>
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#include <stdlib.h>
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#include <string.h>
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#include "servent.h"
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#ifdef __weak_alias
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__weak_alias(getservbyname_r,_getservbyname_r)
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#endif
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static struct servent *
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_servent_getbyname(struct servent_data *sd, struct servent *sp,
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const char *name, const char *proto)
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{
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if ((sd->flags & (_SV_CDB | _SV_PLAINFILE)) == 0)
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return NULL;
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if (sd->flags & _SV_CDB) {
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uint8_t buf[255 * 2 + 2];
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size_t namelen, protolen;
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const uint8_t *data, *data_end;
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const void *data_ptr;
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size_t datalen;
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namelen = strlen(name);
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if (namelen == 0 || namelen > 255)
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return NULL;
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if (proto != NULL) {
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protolen = strlen(proto);
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if (protolen == 0 || protolen > 255)
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return NULL;
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} else
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protolen = 0;
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if (namelen + protolen > 255)
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return NULL;
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buf[0] = (uint8_t)namelen;
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buf[1] = (uint8_t)protolen;
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memcpy(buf + 2, name, namelen);
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memcpy(buf + 2 + namelen, proto, protolen);
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if (cdbr_find(sd->cdb, buf, 2 + namelen + protolen,
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&data_ptr, &datalen))
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return NULL;
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if (datalen < namelen + protolen + 6)
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return NULL;
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data = data_ptr;
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data_end = data + datalen;
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if (protolen) {
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if (data[2] != protolen)
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return NULL;
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if (memcmp(data + 3, proto, protolen + 1))
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return NULL;
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}
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data += 3 + data[2] + 1;
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if (data > data_end)
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return NULL;
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while (data != data_end) {
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if (*data == '\0')
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return NULL;
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if (data + data[0] + 2 > data_end)
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return NULL;
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if (data[0] == namelen &&
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memcmp(data + 1, name, namelen + 1) == 0)
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return _servent_parsedb(sd, sp, data_ptr,
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datalen);
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data += data[0] + 2;
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}
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return NULL;
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} else {
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while (_servent_getline(sd) != -1) {
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char **cp;
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if (_servent_parseline(sd, sp) == NULL)
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continue;
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if (strcmp(name, sp->s_name) == 0)
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goto gotname;
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for (cp = sp->s_aliases; *cp; cp++)
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if (strcmp(name, *cp) == 0)
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goto gotname;
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continue;
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gotname:
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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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getservbyname_r(const char *name, const char *proto, struct servent *sp,
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struct servent_data *sd)
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{
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_DIAGASSERT(name != NULL);
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/* proto may be NULL */
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setservent_r(sd->flags & _SV_STAYOPEN, sd);
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sp = _servent_getbyname(sd, sp, name, 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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