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
  33 #ifndef lint
  34 static const char rcsid[] =
  35   "$FreeBSD$";
  36 #endif /* not lint */
  37
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include <stdlib.h>
  41 #include <unistd.h>
  42 #include <sys/param.h>
  43 #include <rpc/rpc.h>
  44 #include <rpcsvc/yp.h>
  45 struct dom_binding {};
  46 #include <rpcsvc/ypclnt.h>
  47 #include "ypxfr_extern.h"
  48
  49 const char *
  50 ypxfrerr_string(ypxfrstat code)
  51 {
  52         switch (code) {
  53         case YPXFR_SUCC:
  54                 return ("Map successfully transferred");
  55                 break;
  56         case YPXFR_AGE:
  57                 return ("Master's version not newer");
  58                 break;
  59         case YPXFR_NOMAP:
  60                 return ("No such map in server's domain");
  61                 break;
  62         case YPXFR_NODOM:
  63                 return ("Domain not supported by server");
  64                 break;
  65         case YPXFR_RSRC:
  66                 return ("Local resource allocation failure");
  67                 break;
  68         case YPXFR_RPC:
  69                 return ("RPC failure talking to server");
  70                 break;
  71         case YPXFR_MADDR:
  72                 return ("Could not get master server address");
  73                 break;
  74         case YPXFR_YPERR:
  75                 return ("NIS server/map database error");
  76                 break;
  77         case YPXFR_BADARGS:
  78                 return ("Request arguments bad");
  79                 break;
  80         case YPXFR_DBM:
  81                 return ("Local database operation failed");
  82                 break;
  83         case YPXFR_FILE:
  84                 return ("Local file I/O operation failed");
  85                 break;
  86         case YPXFR_SKEW:
  87                 return ("Map version skew during transfer");
  88                 break;
  89         case YPXFR_CLEAR:
  90                 return ("Couldn't send \"clear\" request to local ypserv");
  91                 break;
  92         case YPXFR_FORCE:
  93                 return ("No local order number in map -- use -f flag");
  94                 break;
  95         case YPXFR_XFRERR:
  96                 return ("General ypxfr error");
  97                 break;
  98         case YPXFR_REFUSED:
  99                 return ("Transfer request refused by ypserv");
 100                 break;
 101         default:
 102                 return ("Unknown error code");
 103                 break;
 104         }
 105 }
 106
 107 /*
 108  * These are wrappers for the usual yp_master() and yp_order() functions.
 109  * They can use either local yplib functions (the real yp_master() and
 110  * yp_order()) or do direct RPCs to a specified server. The latter is
 111  * necessary if ypxfr is run on a machine that isn't configured as an
 112  * NIS client (this can happen very easily: a given machine need not be
 113  * an NIS client in order to be an NIS server).
 114  */
 115
 116 /*
 117  * Careful: yp_master() returns a pointer to a dynamically allocated
 118  * buffer. Calling ypproc_master_2() ourselves also returns a pointer
 119  * to dynamically allocated memory, though this time it's memory
 120  * allocated by the XDR routines. We have to rememver to free() or
 121  * xdr_free() the memory as required to avoid leaking memory.
 122  */
 123 char *
 124 ypxfr_get_master(char *domain, char *map, char *source, const int yplib)
 125 {
 126         static char mastername[MAXPATHLEN + 2];
 127
 128         bzero((char *)&mastername, sizeof(mastername));
 129
 130         if (yplib) {
 131                 int res;
 132                 char *master;
 133                 if ((res = yp_master(domain, map, &master))) {
 134                         switch (res) {
 135                         case YPERR_DOMAIN:
 136                                 yp_errno = YPXFR_NODOM;
 137                                 break;
 138                         case YPERR_MAP:
 139                                 yp_errno = YPXFR_NOMAP;
 140                                 break;
 141                         case YPERR_YPERR:
 142                         default:
 143                                 yp_errno = YPXFR_YPERR;
 144                                 break;
 145                         }
 146                         return(NULL);
 147                 } else {
 148                         snprintf(mastername, sizeof(mastername), "%s", master);
 149                         free(master);
 150                         return((char *)&mastername);
 151                 }
 152         } else {
 153                 CLIENT *clnt;
 154                 ypresp_master *resp;
 155                 ypreq_nokey req;
 156
 157                 if ((clnt = clnt_create(source,YPPROG,YPVERS,"udp")) == NULL) {
 158                         yp_error("%s",clnt_spcreateerror("failed to \
 159 create udp handle to ypserv"));
 160                         yp_errno = YPXFR_RPC;
 161                         return(NULL);
 162                 }
 163
 164                 req.map = map;
 165                 req.domain = domain;
 166                 if ((resp = ypproc_master_2(&req, clnt)) == NULL) {
 167                         yp_error("%s",clnt_sperror(clnt,"YPPROC_MASTER \
 168 failed"));
 169                         clnt_destroy(clnt);
 170                         yp_errno = YPXFR_RPC;
 171                         return(NULL);
 172                 }
 173                 clnt_destroy(clnt);
 174                 if (resp->stat != YP_TRUE) {
 175                         switch (resp->stat) {
 176                         case YP_NODOM:
 177                                 yp_errno = YPXFR_NODOM;
 178                                 break;
 179                         case YP_NOMAP:
 180                                 yp_errno = YPXFR_NOMAP;
 181                                 break;
 182                         case YP_YPERR:
 183                         default:
 184                                 yp_errno = YPXFR_YPERR;
 185                                 break;
 186                         }
 187                         return(NULL);
 188                 }
 189                 snprintf(mastername, sizeof(mastername), "%s", resp->peer);
 190 /*              xdr_free(xdr_ypresp_master, (char *)&resp); */
 191                 return((char *)&mastername);
 192         }
 193 }
 194
 195 unsigned long
 196 ypxfr_get_order(char *domain, char *map, char *source, const int yplib)
 197 {
 198         if (yplib) {
 199                 unsigned long order;
 200                 int res;
 201                 if ((res = yp_order(domain, map, (int *)&order))) {
 202                         switch (res) {
 203                         case YPERR_DOMAIN:
 204                                 yp_errno = YPXFR_NODOM;
 205                                 break;
 206                         case YPERR_MAP:
 207                                 yp_errno = YPXFR_NOMAP;
 208                                 break;
 209                         case YPERR_YPERR:
 210                         default:
 211                                 yp_errno = YPXFR_YPERR;
 212                                 break;
 213                         }
 214                         return(0);
 215                 } else
 216                         return(order);
 217         } else {
 218                 CLIENT *clnt;
 219                 ypresp_order *resp;
 220                 ypreq_nokey req;
 221
 222                 if ((clnt = clnt_create(source,YPPROG,YPVERS,"udp")) == NULL) {
 223                         yp_error("%s",clnt_spcreateerror("couldn't create \
 224 udp handle to ypserv"));
 225                         yp_errno = YPXFR_RPC;
 226                         return(0);
 227                 }
 228                 req.map = map;
 229                 req.domain = domain;
 230                 if ((resp = ypproc_order_2(&req, clnt)) == NULL) {
 231                         yp_error("%s", clnt_sperror(clnt, "YPPROC_ORDER \
 232 failed"));
 233                         clnt_destroy(clnt);
 234                         yp_errno = YPXFR_RPC;
 235                         return(0);
 236                 }
 237                 clnt_destroy(clnt);
 238                 if (resp->stat != YP_TRUE) {
 239                         switch (resp->stat) {
 240                         case YP_NODOM:
 241                                 yp_errno = YPXFR_NODOM;
 242                                 break;
 243                         case YP_NOMAP:
 244                                 yp_errno = YPXFR_NOMAP;
 245                                 break;
 246                         case YP_YPERR:
 247                         default:
 248                                 yp_errno = YPXFR_YPERR;
 249                                 break;
 250                         }
 251                         return(0);
 252                 }
 253                 return(resp->ordernum);
 254         }
 255 }
 256
 257 int
 258 ypxfr_match(char *server, char *domain, char *map, char *key,
 259     unsigned long keylen)
 260 {
 261         ypreq_key ypkey;
 262         ypresp_val *ypval;
 263         CLIENT *clnt;
 264         static char buf[YPMAXRECORD + 2];
 265
 266         bzero(buf, sizeof(buf));
 267
 268         if ((clnt = clnt_create(server, YPPROG,YPVERS,"udp")) == NULL) {
 269                 yp_error("failed to create UDP handle: %s",
 270                                         clnt_spcreateerror(server));
 271                 return(0);
 272         }
 273
 274         ypkey.domain = domain;
 275         ypkey.map = map;
 276         ypkey.key.keydat_len = keylen;
 277         ypkey.key.keydat_val = key;
 278
 279         if ((ypval = ypproc_match_2(&ypkey, clnt)) == NULL) {
 280                 clnt_destroy(clnt);
 281                 yp_error("%s: %s", server,
 282                                 clnt_sperror(clnt,"YPPROC_MATCH failed"));
 283                 return(0);
 284         }
 285
 286         clnt_destroy(clnt);
 287
 288         if (ypval->stat != YP_TRUE) {
 289                 xdr_free((xdrproc_t)xdr_ypresp_val, ypval);
 290                 return(0);
 291         }
 292
 293         xdr_free((xdrproc_t)xdr_ypresp_val, ypval);
 294
 295         return(1);
 296 }