lib/libc/yp/yp_first.c

   1 /*      $NetBSD: yp_first.c,v 1.16 2012/06/25 22:32:46 abs Exp $         */
   2
   3 /*
   4  * Copyright (c) 1992, 1993 Theo de Raadt <deraadt@fsa.ca>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  17  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 #if defined(LIBC_SCCS) && !defined(lint)
  31 __RCSID("$NetBSD: yp_first.c,v 1.16 2012/06/25 22:32:46 abs Exp $");
  32 #endif
  33
  34 #include "namespace.h"
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <rpc/rpc.h>
  38 #include <rpcsvc/yp_prot.h>
  39 #include <rpcsvc/ypclnt.h>
  40 #include "local.h"
  41
  42 extern struct timeval _yplib_timeout;
  43 extern int _yplib_nerrs;
  44 extern int _yplib_bindtries;
  45
  46 #ifdef __weak_alias
  47 __weak_alias(yp_first,_yp_first)
  48 __weak_alias(yp_next,_yp_next)
  49 #endif
  50
  51 int
  52 yp_first(const char *indomain, const char *inmap, char **outkey,
  53     int *outkeylen, char **outval, int *outvallen)
  54 {
  55         struct ypresp_key_val yprkv;
  56         struct ypreq_nokey yprnk;
  57         struct dom_binding *ysd;
  58         int r, nerrs = 0;
  59
  60         if (outkey == NULL || outkeylen == NULL || \
  61             outval == NULL || outvallen == NULL)
  62                 return YPERR_BADARGS;
  63         *outkey = *outval = NULL;
  64         *outkeylen = *outvallen = 0;
  65         if (_yp_invalid_domain(indomain))
  66                 return YPERR_BADARGS;
  67         if (inmap == NULL || *inmap == '\0'
  68             || strlen(inmap) > YPMAXMAP)
  69                 return YPERR_BADARGS;
  70
  71 again:
  72         if (_yp_dobind(indomain, &ysd) != 0)
  73                 return YPERR_DOMAIN;
  74
  75         yprnk.domain = indomain;
  76         yprnk.map = inmap;
  77         (void)memset(&yprkv, 0, sizeof yprkv);
  78
  79         r = clnt_call(ysd->dom_client, (rpcproc_t)YPPROC_FIRST,
  80             (xdrproc_t)xdr_ypreq_nokey,
  81             &yprnk, (xdrproc_t)xdr_ypresp_key_val, &yprkv, _yplib_timeout);
  82         if (r != RPC_SUCCESS) {
  83                 if (_yplib_bindtries <= 0 && ++nerrs == _yplib_nerrs) {
  84                         clnt_perror(ysd->dom_client, "yp_first: clnt_call");
  85                         nerrs = 0;
  86                 } else if (_yplib_bindtries > 0 && ++nerrs == _yplib_bindtries)
  87                         return YPERR_YPSERV;
  88                 ysd->dom_vers = -1;
  89                 goto again;
  90         }
  91         if (!(r = ypprot_err(yprkv.status))) {
  92                 *outkeylen = yprkv.keydat.dsize;
  93                 if ((*outkey = malloc((size_t)(*outkeylen + 1))) == NULL)
  94                         r = YPERR_RESRC;
  95                 else {
  96                         (void)memcpy(*outkey, yprkv.keydat.dptr,
  97                             (size_t)*outkeylen);
  98                         (*outkey)[*outkeylen] = '\0';
  99                 }
 100                 *outvallen = yprkv.valdat.dsize;
 101                 if ((*outval = malloc((size_t)(*outvallen + 1))) == NULL)
 102                         r = YPERR_RESRC;
 103                 else {
 104                         (void)memcpy(*outval, yprkv.valdat.dptr,
 105                             (size_t)*outvallen);
 106                         (*outval)[*outvallen] = '\0';
 107                 }
 108         }
 109         xdr_free((xdrproc_t)xdr_ypresp_key_val, (char *)(void *)&yprkv);
 110         __yp_unbind(ysd);
 111         if (r != 0) {
 112                 if (*outkey) {
 113                         free(*outkey);
 114                         *outkey = NULL;
 115                 }
 116                 if (*outval) {
 117                         free(*outval);
 118                         *outval = NULL;
 119                 }
 120         }
 121         return r;
 122 }
 123
 124 int
 125 yp_next(const char *indomain, const char *inmap, const char *inkey,
 126     int inkeylen, char **outkey, int *outkeylen, char **outval, int *outvallen)
 127 {
 128         struct ypresp_key_val yprkv;
 129         struct ypreq_key yprk;
 130         struct dom_binding *ysd;
 131         int r, nerrs = 0;
 132
 133         if (outkey == NULL || outkeylen == NULL || \
 134             outval == NULL || outvallen == NULL || \
 135             inkey == NULL)
 136                 return YPERR_BADARGS;
 137         *outkey = *outval = NULL;
 138         *outkeylen = *outvallen = 0;
 139
 140         if (_yp_invalid_domain(indomain))
 141                 return YPERR_BADARGS;
 142         if (inmap == NULL || *inmap == '\0'
 143             || strlen(inmap) > YPMAXMAP)
 144                 return YPERR_BADARGS;
 145
 146 again:
 147         if (_yp_dobind(indomain, &ysd) != 0)
 148                 return YPERR_DOMAIN;
 149
 150         yprk.domain = indomain;
 151         yprk.map = inmap;
 152         yprk.keydat.dptr = inkey;
 153         yprk.keydat.dsize = inkeylen;
 154         (void)memset(&yprkv, 0, sizeof yprkv);
 155
 156         r = clnt_call(ysd->dom_client, (rpcproc_t)YPPROC_NEXT,
 157             (xdrproc_t)xdr_ypreq_key,
 158             &yprk, (xdrproc_t)xdr_ypresp_key_val, &yprkv, _yplib_timeout);
 159         if (r != RPC_SUCCESS) {
 160                 if (_yplib_bindtries <= 0 && ++nerrs == _yplib_nerrs) {
 161                         clnt_perror(ysd->dom_client, "yp_next: clnt_call");
 162                         nerrs = 0;
 163                 } else if (_yplib_bindtries > 0 && ++nerrs == _yplib_bindtries)
 164                         return YPERR_YPSERV;
 165                 ysd->dom_vers = -1;
 166                 goto again;
 167         }
 168         if (!(r = ypprot_err(yprkv.status))) {
 169                 *outkeylen = yprkv.keydat.dsize;
 170                 if ((*outkey = malloc((size_t)(*outkeylen + 1))) == NULL)
 171                         r = YPERR_RESRC;
 172                 else {
 173                         (void)memcpy(*outkey, yprkv.keydat.dptr,
 174                             (size_t)*outkeylen);
 175                         (*outkey)[*outkeylen] = '\0';
 176                 }
 177                 *outvallen = yprkv.valdat.dsize;
 178                 if ((*outval = malloc((size_t)(*outvallen + 1))) == NULL)
 179                         r = YPERR_RESRC;
 180                 else {
 181                         (void)memcpy(*outval, yprkv.valdat.dptr,
 182                             (size_t)*outvallen);
 183                         (*outval)[*outvallen] = '\0';
 184                 }
 185         }
 186         xdr_free((xdrproc_t)xdr_ypresp_key_val, (char *)(void *)&yprkv);
 187         __yp_unbind(ysd);
 188         if (r != 0) {
 189                 if (*outkey) {
 190                         free(*outkey);
 191                         *outkey = NULL;
 192                 }
 193                 if (*outval) {
 194                         free(*outval);
 195                         *outval = NULL;
 196                 }
 197         }
 198         return r;
 199 }