43fa6fe319
identifier namespace by renaming non standard functions and variables such that they have a leading underscore. The library will use those names internally. Weak aliases are used to provide the original names to the API. This is only the first part of this change. It is most of the functions which are implemented in C for all NetBSD ports. Subsequent changes are to add the same support to the remaining C files, to assembly files, and to the automagically generated assembly source used for system calls. When all of the above is done, ports with weak alias support should add a definition for __weak_alias to <sys/cdefs.h>.
254 lines
6.1 KiB
C
254 lines
6.1 KiB
C
/* $NetBSD: yp_match.c,v 1.9 1997/07/21 14:09:29 jtc Exp $ */
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/*
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* Copyright (c) 1992, 1993 Theo de Raadt <deraadt@fsa.ca>
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* 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Theo de Raadt.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* 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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__RCSID("$NetBSD: yp_match.c,v 1.9 1997/07/21 14:09:29 jtc Exp $");
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#endif
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#include "namespace.h"
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#include <stdlib.h>
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#include <string.h>
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#include <rpc/rpc.h>
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#include "local.h"
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#define YPMATCHCACHE
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extern struct timeval _yplib_timeout;
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extern int _yplib_nerrs;
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extern char _yp_domain[];
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#ifdef __weak_alias
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__weak_alias(yp_match,_yp_match);
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#endif
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#ifdef YPMATCHCACHE
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int _yplib_cache = 5;
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static struct ypmatch_ent {
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struct ypmatch_ent *next;
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char *map, *key;
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char *val;
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int keylen, vallen;
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time_t expire_t;
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} *ypmc;
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static bool_t ypmatch_add __P((const char *, const char *, int, char *, int));
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static bool_t ypmatch_find __P((const char *, const char *, int, const char **,
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int *));
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static bool_t
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ypmatch_add(map, key, keylen, val, vallen)
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const char *map;
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const char *key;
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int keylen;
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char *val;
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int vallen;
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{
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struct ypmatch_ent *ep;
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time_t t;
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(void)time(&t);
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for (ep = ypmc; ep; ep = ep->next)
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if (ep->expire_t < t)
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break;
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if (ep == NULL) {
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if ((ep = malloc(sizeof *ep)) == NULL)
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return 0;
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(void)memset(ep, 0, sizeof *ep);
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if (ypmc)
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ep->next = ypmc;
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ypmc = ep;
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}
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if (ep->key) {
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free(ep->key);
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ep->key = NULL;
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}
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if (ep->val) {
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free(ep->val);
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ep->val = NULL;
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}
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if ((ep->key = malloc(keylen)) == NULL)
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return 0;
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if ((ep->val = malloc(vallen)) == NULL) {
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free(ep->key);
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ep->key = NULL;
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return 0;
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}
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ep->keylen = keylen;
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ep->vallen = vallen;
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(void)memcpy(ep->key, key, ep->keylen);
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(void)memcpy(ep->val, val, ep->vallen);
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if (ep->map) {
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if (strcmp(ep->map, map)) {
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free(ep->map);
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if ((ep->map = strdup(map)) == NULL)
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return 0;
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}
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} else {
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if ((ep->map = strdup(map)) == NULL)
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return 0;
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}
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ep->expire_t = t + _yplib_cache;
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return 1;
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}
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static bool_t
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ypmatch_find(map, key, keylen, val, vallen)
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const char *map;
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const char *key;
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int keylen;
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const char **val;
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int *vallen;
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{
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struct ypmatch_ent *ep;
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time_t t;
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if (ypmc == NULL)
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return 0;
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(void) time(&t);
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for (ep = ypmc; ep; ep = ep->next) {
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if (ep->keylen != keylen)
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continue;
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if (strcmp(ep->map, map))
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continue;
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if (memcmp(ep->key, key, keylen))
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continue;
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if (t > ep->expire_t)
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continue;
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*val = ep->val;
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*vallen = ep->vallen;
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return 1;
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}
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return 0;
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}
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#endif
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int
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yp_match(indomain, inmap, inkey, inkeylen, outval, outvallen)
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const char *indomain;
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const char *inmap;
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const char *inkey;
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int inkeylen;
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char **outval;
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int *outvallen;
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{
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struct dom_binding *ysd;
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struct ypresp_val yprv;
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struct ypreq_key yprk;
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int r, nerrs = 0;
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if (outval == NULL)
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return YPERR_BADARGS;
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*outval = NULL;
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*outvallen = 0;
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if (_yp_invalid_domain(indomain))
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return YPERR_BADARGS;
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if (inmap == NULL || *inmap == '\0'
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|| strlen(inmap) > YPMAXMAP)
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return YPERR_BADARGS;
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if (inkey == NULL || inkeylen == 0)
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return YPERR_BADARGS;
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again:
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if (_yp_dobind(indomain, &ysd) != 0)
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return YPERR_DOMAIN;
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#ifdef YPMATCHCACHE
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if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
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inkeylen, &yprv.valdat.dptr, &yprv.valdat.dsize)) {
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*outvallen = yprv.valdat.dsize;
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if ((*outval = malloc(*outvallen + 1)) == NULL)
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return YPERR_YPERR;
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(void)memcpy(*outval, yprv.valdat.dptr, *outvallen);
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(*outval)[*outvallen] = '\0';
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return 0;
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}
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#endif
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yprk.domain = indomain;
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yprk.map = inmap;
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yprk.keydat.dptr = (char *) inkey;
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yprk.keydat.dsize = inkeylen;
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memset(&yprv, 0, sizeof yprv);
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r = clnt_call(ysd->dom_client, YPPROC_MATCH,
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xdr_ypreq_key, &yprk, xdr_ypresp_val, &yprv,
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_yplib_timeout);
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if (r != RPC_SUCCESS) {
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if (++nerrs == _yplib_nerrs) {
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clnt_perror(ysd->dom_client, "yp_match: clnt_call");
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nerrs = 0;
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}
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ysd->dom_vers = -1;
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goto again;
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}
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if (!(r = ypprot_err(yprv.status))) {
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*outvallen = yprv.valdat.dsize;
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if ((*outval = malloc(*outvallen + 1)) == NULL)
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return YPERR_YPERR;
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(void)memcpy(*outval, yprv.valdat.dptr, *outvallen);
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(*outval)[*outvallen] = '\0';
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#ifdef YPMATCHCACHE
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if (strcmp(_yp_domain, indomain) == 0)
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if (!ypmatch_add(inmap, inkey, inkeylen,
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*outval, *outvallen))
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r = YPERR_RESRC;
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#endif
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}
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xdr_free(xdr_ypresp_val, (char *) &yprv);
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__yp_unbind(ysd);
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if (r != 0) {
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if (*outval) {
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free(*outval);
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*outval = NULL;
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}
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}
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return r;
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}
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