libexec/ypxfr/ypxfr_misc.c

   1 /*
   2  * Copyright (c) 1995
   3  *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Bill Paul.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $FreeBSD: src/libexec/ypxfr/ypxfr_misc.c,v 1.9.2.2 2002/02/15 00:46:54 des Exp $
  33  */
  34
  35 #include <stdio.h>
  36 #include <string.h>
  37 #include <stdlib.h>
  38 #include <unistd.h>
  39 #include <sys/param.h>
  40 #include <rpc/rpc.h>
  41 #include <rpcsvc/yp.h>
  42 struct dom_binding {};
  43 #include <rpcsvc/ypclnt.h>
  44 #include "ypxfr_extern.h"
  45
  46 const char *
  47 ypxfrerr_string(ypxfrstat code)
  48 {
  49         switch (code) {
  50         case YPXFR_SUCC:
  51                 return ("Map successfully transferred");
  52                 break;
  53         case YPXFR_AGE:
  54                 return ("Master's version not newer");
  55                 break;
  56         case YPXFR_NOMAP:
  57                 return ("No such map in server's domain");
  58                 break;
  59         case YPXFR_NODOM:
  60                 return ("Domain not supported by server");
  61                 break;
  62         case YPXFR_RSRC:
  63                 return ("Local resource allocation failure");
  64                 break;
  65         case YPXFR_RPC:
  66                 return ("RPC failure talking to server");
  67                 break;
  68         case YPXFR_MADDR:
  69                 return ("Could not get master server address");
  70                 break;
  71         case YPXFR_YPERR:
  72                 return ("NIS server/map database error");
  73                 break;
  74         case YPXFR_BADARGS:
  75                 return ("Request arguments bad");
  76                 break;
  77         case YPXFR_DBM:
  78                 return ("Local database operation failed");
  79                 break;
  80         case YPXFR_FILE:
  81                 return ("Local file I/O operation failed");
  82                 break;
  83         case YPXFR_SKEW:
  84                 return ("Map version skew during transfer");
  85                 break;
  86         case YPXFR_CLEAR:
  87                 return ("Couldn't send \"clear\" request to local ypserv");
  88                 break;
  89         case YPXFR_FORCE:
  90                 return ("No local order number in map -- use -f flag");
  91                 break;
  92         case YPXFR_XFRERR:
  93                 return ("General ypxfr error");
  94                 break;
  95         case YPXFR_REFUSED:
  96                 return ("Transfer request refused by ypserv");
  97                 break;
  98         default:
  99                 return ("Unknown error code");
 100                 break;
 101         }
 102 }
 103
 104 /*
 105  * These are wrappers for the usual yp_master() and yp_order() functions.
 106  * They can use either local yplib functions (the real yp_master() and
 107  * yp_order()) or do direct RPCs to a specified server. The latter is
 108  * necessary if ypxfr is run on a machine that isn't configured as an
 109  * NIS client (this can happen very easily: a given machine need not be
 110  * an NIS client in order to be an NIS server).
 111  */
 112
 113 /*
 114  * Careful: yp_master() returns a pointer to a dynamically allocated
 115  * buffer. Calling ypproc_master_2() ourselves also returns a pointer
 116  * to dynamically allocated memory, though this time it's memory
 117  * allocated by the XDR routines. We have to rememver to free() or
 118  * xdr_free() the memory as required to avoid leaking memory.
 119  */
 120 char *
 121 ypxfr_get_master(char *domain, char *map, char *source, const int yplib)
 122 {
 123         static char mastername[MAXPATHLEN + 2];
 124
 125         bzero((char *)&mastername, sizeof(mastername));
 126
 127         if (yplib) {
 128                 int res;
 129                 char *master;
 130                 if ((res = yp_master(domain, map, &master))) {
 131                         switch (res) {
 132                         case YPERR_DOMAIN:
 133                                 yp_errno = YPXFR_NODOM;
 134                                 break;
 135                         case YPERR_MAP:
 136                                 yp_errno = YPXFR_NOMAP;
 137                                 break;
 138                         case YPERR_YPERR:
 139                         default:
 140                                 yp_errno = YPXFR_YPERR;
 141                                 break;
 142                         }
 143                         return(NULL);
 144                 } else {
 145                         snprintf(mastername, sizeof(mastername), "%s", master);
 146                         free(master);
 147                         return((char *)&mastername);
 148                 }
 149         } else {
 150                 CLIENT *clnt;
 151                 ypresp_master *resp;
 152                 ypreq_nokey req;
 153
 154                 if ((clnt = clnt_create(source,YPPROG,YPVERS,"udp")) == NULL) {
 155                         yp_error("%s",clnt_spcreateerror("failed to \
 156 create udp handle to ypserv"));
 157                         yp_errno = YPXFR_RPC;
 158                         return(NULL);
 159                 }
 160
 161                 req.map = map;
 162                 req.domain = domain;
 163                 if ((resp = ypproc_master_2(&req, clnt)) == NULL) {
 164                         yp_error("%s",clnt_sperror(clnt,"YPPROC_MASTER \
 165 failed"));
 166                         clnt_destroy(clnt);
 167                         yp_errno = YPXFR_RPC;
 168                         return(NULL);
 169                 }
 170                 clnt_destroy(clnt);
 171                 if (resp->stat != YP_TRUE) {
 172                         switch (resp->stat) {
 173                         case YP_NODOM:
 174                                 yp_errno = YPXFR_NODOM;
 175                                 break;
 176                         case YP_NOMAP:
 177                                 yp_errno = YPXFR_NOMAP;
 178                                 break;
 179                         case YP_YPERR:
 180                         default:
 181                                 yp_errno = YPXFR_YPERR;
 182                                 break;
 183                         }
 184                         return(NULL);
 185                 }
 186                 snprintf(mastername, sizeof(mastername), "%s", resp->peer);
 187 /*              xdr_free(xdr_ypresp_master, (char *)&resp); */
 188                 return((char *)&mastername);
 189         }
 190 }
 191
 192 unsigned long
 193 ypxfr_get_order(char *domain, char *map, char *source, const int yplib)
 194 {
 195         if (yplib) {
 196                 unsigned long order;
 197                 int res;
 198                 if ((res = yp_order(domain, map, (int *)&order))) {
 199                         switch (res) {
 200                         case YPERR_DOMAIN:
 201                                 yp_errno = YPXFR_NODOM;
 202                                 break;
 203                         case YPERR_MAP:
 204                                 yp_errno = YPXFR_NOMAP;
 205                                 break;
 206                         case YPERR_YPERR:
 207                         default:
 208                                 yp_errno = YPXFR_YPERR;
 209                                 break;
 210                         }
 211                         return(0);
 212                 } else
 213                         return(order);
 214         } else {
 215                 CLIENT *clnt;
 216                 ypresp_order *resp;
 217                 ypreq_nokey req;
 218
 219                 if ((clnt = clnt_create(source,YPPROG,YPVERS,"udp")) == NULL) {
 220                         yp_error("%s",clnt_spcreateerror("couldn't create \
 221 udp handle to ypserv"));
 222                         yp_errno = YPXFR_RPC;
 223                         return(0);
 224                 }
 225                 req.map = map;
 226                 req.domain = domain;
 227                 if ((resp = ypproc_order_2(&req, clnt)) == NULL) {
 228                         yp_error("%s", clnt_sperror(clnt, "YPPROC_ORDER \
 229 failed"));
 230                         clnt_destroy(clnt);
 231                         yp_errno = YPXFR_RPC;
 232                         return(0);
 233                 }
 234                 clnt_destroy(clnt);
 235                 if (resp->stat != YP_TRUE) {
 236                         switch (resp->stat) {
 237                         case YP_NODOM:
 238                                 yp_errno = YPXFR_NODOM;
 239                                 break;
 240                         case YP_NOMAP:
 241                                 yp_errno = YPXFR_NOMAP;
 242                                 break;
 243                         case YP_YPERR:
 244                         default:
 245                                 yp_errno = YPXFR_YPERR;
 246                                 break;
 247                         }
 248                         return(0);
 249                 }
 250                 return(resp->ordernum);
 251         }
 252 }
 253
 254 int
 255 ypxfr_match(char *server, char *domain, char *map, char *key,
 256     unsigned long keylen)
 257 {
 258         ypreq_key ypkey;
 259         ypresp_val *ypval;
 260         CLIENT *clnt;
 261         static char buf[YPMAXRECORD + 2];
 262
 263         bzero((char *)buf, sizeof(buf));
 264
 265         if ((clnt = clnt_create(server, YPPROG,YPVERS,"udp")) == NULL) {
 266                 yp_error("failed to create UDP handle: %s",
 267                                         clnt_spcreateerror(server));
 268                 return(0);
 269         }
 270
 271         ypkey.domain = domain;
 272         ypkey.map = map;
 273         ypkey.key.keydat_len = keylen;
 274         ypkey.key.keydat_val = key;
 275
 276         if ((ypval = ypproc_match_2(&ypkey, clnt)) == NULL) {
 277                 clnt_destroy(clnt);
 278                 yp_error("%s: %s", server,
 279                                 clnt_sperror(clnt,"YPPROC_MATCH failed"));
 280                 return(0);
 281         }
 282
 283         clnt_destroy(clnt);
 284
 285         if (ypval->stat != YP_TRUE) {
 286                 xdr_free((xdrproc_t)xdr_ypresp_val, ypval);
 287                 return(0);
 288         }
 289
 290         xdr_free((xdrproc_t)xdr_ypresp_val, ypval);
 291
 292         return(1);
 293 }