262 lines
6.2 KiB
C
262 lines
6.2 KiB
C
/* $NetBSD: yp_match.c,v 1.17 2005/11/29 03:12:01 christos 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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*
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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 1.17 2005/11/29 03:12:01 christos Exp $");
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#endif
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#include "namespace.h"
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.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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_DIAGASSERT(map != NULL);
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_DIAGASSERT(key != NULL);
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_DIAGASSERT(val != NULL);
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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((size_t)keylen)) == NULL)
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return 0;
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if ((ep->val = malloc((size_t)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, (size_t)ep->keylen);
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(void)memcpy(ep->val, val, (size_t)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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_DIAGASSERT(map != NULL);
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_DIAGASSERT(key != NULL);
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_DIAGASSERT(val != NULL);
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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, (size_t)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 || outvallen == 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((size_t)(*outvallen + 1))) == NULL)
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return YPERR_YPERR;
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(void)memcpy(*outval, yprv.valdat.dptr, (size_t)*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 = __UNCONST(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, (rpcproc_t)YPPROC_MATCH,
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(xdrproc_t)xdr_ypreq_key, &yprk,
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(xdrproc_t)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((size_t)(*outvallen + 1))) == NULL)
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return YPERR_YPERR;
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(void)memcpy(*outval, yprv.valdat.dptr, (size_t)*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((xdrproc_t)xdr_ypresp_val, (char *)(void *)&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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