/* $NetBSD: yp_match.c,v 1.13 1999/09/16 11:45:45 lukem Exp $ */ /* * Copyright (c) 1992, 1993 Theo de Raadt * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Theo de Raadt. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #if defined(LIBC_SCCS) && !defined(lint) __RCSID("$NetBSD: yp_match.c,v 1.13 1999/09/16 11:45:45 lukem Exp $"); #endif #include "namespace.h" #include #include #include #include #include #include #include #include "local.h" #define YPMATCHCACHE extern struct timeval _yplib_timeout; extern int _yplib_nerrs; extern char _yp_domain[]; #ifdef __weak_alias __weak_alias(yp_match,_yp_match); #endif #ifdef YPMATCHCACHE int _yplib_cache = 5; static struct ypmatch_ent { struct ypmatch_ent *next; char *map, *key; char *val; int keylen, vallen; time_t expire_t; } *ypmc; static bool_t ypmatch_add __P((const char *, const char *, int, char *, int)); static bool_t ypmatch_find __P((const char *, const char *, int, const char **, int *)); static bool_t ypmatch_add(map, key, keylen, val, vallen) const char *map; const char *key; int keylen; char *val; int vallen; { struct ypmatch_ent *ep; time_t t; _DIAGASSERT(map != NULL); _DIAGASSERT(key != NULL); _DIAGASSERT(val != NULL); (void)time(&t); for (ep = ypmc; ep; ep = ep->next) if (ep->expire_t < t) break; if (ep == NULL) { if ((ep = malloc(sizeof *ep)) == NULL) return 0; (void)memset(ep, 0, sizeof *ep); if (ypmc) ep->next = ypmc; ypmc = ep; } if (ep->key) { free(ep->key); ep->key = NULL; } if (ep->val) { free(ep->val); ep->val = NULL; } if ((ep->key = malloc((size_t)keylen)) == NULL) return 0; if ((ep->val = malloc((size_t)vallen)) == NULL) { free(ep->key); ep->key = NULL; return 0; } ep->keylen = keylen; ep->vallen = vallen; (void)memcpy(ep->key, key, (size_t)ep->keylen); (void)memcpy(ep->val, val, (size_t)ep->vallen); if (ep->map) { if (strcmp(ep->map, map)) { free(ep->map); if ((ep->map = strdup(map)) == NULL) return 0; } } else { if ((ep->map = strdup(map)) == NULL) return 0; } ep->expire_t = t + _yplib_cache; return 1; } static bool_t ypmatch_find(map, key, keylen, val, vallen) const char *map; const char *key; int keylen; const char **val; int *vallen; { struct ypmatch_ent *ep; time_t t; _DIAGASSERT(map != NULL); _DIAGASSERT(key != NULL); _DIAGASSERT(val != NULL); if (ypmc == NULL) return 0; (void) time(&t); for (ep = ypmc; ep; ep = ep->next) { if (ep->keylen != keylen) continue; if (strcmp(ep->map, map)) continue; if (memcmp(ep->key, key, (size_t)keylen)) continue; if (t > ep->expire_t) continue; *val = ep->val; *vallen = ep->vallen; return 1; } return 0; } #endif int yp_match(indomain, inmap, inkey, inkeylen, outval, outvallen) const char *indomain; const char *inmap; const char *inkey; int inkeylen; char **outval; int *outvallen; { struct dom_binding *ysd; struct ypresp_val yprv; struct ypreq_key yprk; int r, nerrs = 0; if (outval == NULL || outvallen == NULL) return YPERR_BADARGS; *outval = NULL; *outvallen = 0; if (_yp_invalid_domain(indomain)) return YPERR_BADARGS; if (inmap == NULL || *inmap == '\0' || strlen(inmap) > YPMAXMAP) return YPERR_BADARGS; if (inkey == NULL || inkeylen == 0) return YPERR_BADARGS; again: if (_yp_dobind(indomain, &ysd) != 0) return YPERR_DOMAIN; #ifdef YPMATCHCACHE if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey, inkeylen, &yprv.valdat.dptr, &yprv.valdat.dsize)) { *outvallen = yprv.valdat.dsize; if ((*outval = malloc((size_t)(*outvallen + 1))) == NULL) return YPERR_YPERR; (void)memcpy(*outval, yprv.valdat.dptr, (size_t)*outvallen); (*outval)[*outvallen] = '\0'; return 0; } #endif yprk.domain = indomain; yprk.map = inmap; /* LINTED const castaway */ yprk.keydat.dptr = (char *)(void *)inkey; yprk.keydat.dsize = inkeylen; memset(&yprv, 0, sizeof yprv); r = clnt_call(ysd->dom_client, YPPROC_MATCH, (xdrproc_t)xdr_ypreq_key, &yprk, (xdrproc_t)xdr_ypresp_val, &yprv, _yplib_timeout); if (r != RPC_SUCCESS) { if (++nerrs == _yplib_nerrs) { clnt_perror(ysd->dom_client, "yp_match: clnt_call"); nerrs = 0; } ysd->dom_vers = -1; goto again; } if (!(r = ypprot_err(yprv.status))) { *outvallen = yprv.valdat.dsize; if ((*outval = malloc((size_t)(*outvallen + 1))) == NULL) return YPERR_YPERR; (void)memcpy(*outval, yprv.valdat.dptr, (size_t)*outvallen); (*outval)[*outvallen] = '\0'; #ifdef YPMATCHCACHE if (strcmp(_yp_domain, indomain) == 0) if (!ypmatch_add(inmap, inkey, inkeylen, *outval, *outvallen)) r = YPERR_RESRC; #endif } xdr_free((xdrproc_t)xdr_ypresp_val, (char *)(void *)&yprv); __yp_unbind(ysd); if (r != 0) { if (*outval) { free(*outval); *outval = NULL; } } return r; }