usr.sbin/ypserv/yp_server.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/usr.sbin/ypserv/yp_server.c,v 1.40 2006/06/09 14:01:07 maxim Exp $
  33  */
  34
  35 #include "yp.h"
  36 #include "yp_extern.h"
  37 #include <dirent.h>
  38 #include <errno.h>
  39 #include <stdlib.h>
  40 #include <sys/stat.h>
  41 #include <sys/param.h>
  42 #include <sys/types.h>
  43 #include <sys/socket.h>
  44 #include <netinet/in.h>
  45 #include <arpa/inet.h>
  46 #include <rpc/rpc.h>
  47
  48 int children = 0;
  49
  50 #define MASTER_STRING   "YP_MASTER_NAME"
  51 #define MASTER_SZ       sizeof(MASTER_STRING) - 1
  52 #define ORDER_STRING    "YP_LAST_MODIFIED"
  53 #define ORDER_SZ        sizeof(ORDER_STRING) - 1
  54
  55 static pid_t
  56 yp_fork(void)
  57 {
  58         if (yp_pid != getpid()) {
  59                 yp_error("child %d trying to fork!", getpid());
  60                 errno = EEXIST;
  61                 return(-1);
  62         }
  63
  64         return(fork());
  65 }
  66
  67 /*
  68  * NIS v2 support. This is where most of the action happens.
  69  */
  70
  71 void *
  72 ypproc_null_2_svc(void *argp, struct svc_req *rqstp)
  73 {
  74         static char * result;
  75         static char rval = 0;
  76
  77 #ifdef DB_CACHE
  78         if (yp_access(NULL, NULL, (struct svc_req *)rqstp))
  79 #else
  80         if (yp_access(NULL, (struct svc_req *)rqstp))
  81 #endif
  82                 return(NULL);
  83
  84         result = &rval;
  85
  86         return((void *) &result);
  87 }
  88
  89 bool_t *
  90 ypproc_domain_2_svc(domainname *argp, struct svc_req *rqstp)
  91 {
  92         static bool_t  result;
  93
  94 #ifdef DB_CACHE
  95         if (yp_access(NULL, NULL, (struct svc_req *)rqstp)) {
  96 #else
  97         if (yp_access(NULL, (struct svc_req *)rqstp)) {
  98 #endif
  99                 result = FALSE;
 100                 return (&result);
 101         }
 102
 103         if (argp == NULL || yp_validdomain(*argp))
 104                 result = FALSE;
 105         else
 106                 result = TRUE;
 107
 108         return (&result);
 109 }
 110
 111 bool_t *
 112 ypproc_domain_nonack_2_svc(domainname *argp, struct svc_req *rqstp)
 113 {
 114         static bool_t  result;
 115
 116 #ifdef DB_CACHE
 117         if (yp_access(NULL, NULL, (struct svc_req *)rqstp))
 118 #else
 119         if (yp_access(NULL, (struct svc_req *)rqstp))
 120 #endif
 121                 return (NULL);
 122
 123         if (argp == NULL || yp_validdomain(*argp))
 124                 return (NULL);
 125         else
 126                 result = TRUE;
 127
 128         return (&result);
 129 }
 130
 131 ypresp_val *
 132 ypproc_match_2_svc(ypreq_key *argp, struct svc_req *rqstp)
 133 {
 134         static ypresp_val  result;
 135
 136         result.val.valdat_val = "";
 137         result.val.valdat_len = 0;
 138
 139 #ifdef DB_CACHE
 140         if (yp_access(argp->map, argp->domain, (struct svc_req *)rqstp)) {
 141 #else
 142         if (yp_access(argp->map, (struct svc_req *)rqstp)) {
 143 #endif
 144                 result.stat = YP_YPERR;
 145                 return (&result);
 146         }
 147
 148         if (argp->domain == NULL || argp->map == NULL) {
 149                 result.stat = YP_BADARGS;
 150                 return (&result);
 151         }
 152
 153         if (yp_select_map(argp->map, argp->domain, NULL, 1) != YP_TRUE) {
 154                 result.stat = yp_errno;
 155                 return(&result);
 156         }
 157
 158         result.stat = yp_getbykey(&argp->key, &result.val);
 159
 160         /*
 161          * Do DNS lookups for hosts maps if database lookup failed.
 162          */
 163
 164 #ifdef DB_CACHE
 165         if (do_dns && result.stat != YP_TRUE &&
 166             (yp_testflag(argp->map, argp->domain, YP_INTERDOMAIN) ||
 167             (strstr(argp->map, "hosts") || strstr(argp->map, "ipnodes")))) {
 168 #else
 169         if (do_dns && result.stat != YP_TRUE &&
 170             (strstr(argp->map, "hosts") || strstr(argp->map, "ipnodes"))) {
 171 #endif
 172                 char                    nbuf[YPMAXRECORD];
 173
 174                 /* NUL terminate! NUL terminate!! NUL TERMINATE!!! */
 175                 bcopy(argp->key.keydat_val, nbuf, argp->key.keydat_len);
 176                 nbuf[argp->key.keydat_len] = '\0';
 177
 178                 if (debug)
 179                         yp_error("doing DNS lookup of %s", nbuf);
 180
 181                 if (!strcmp(argp->map, "hosts.byname"))
 182                         result.stat = yp_async_lookup_name(rqstp, nbuf,
 183                             AF_INET);
 184                 else if (!strcmp(argp->map, "hosts.byaddr"))
 185                         result.stat = yp_async_lookup_addr(rqstp, nbuf,
 186                             AF_INET);
 187                 else if (!strcmp(argp->map, "ipnodes.byname"))
 188                         result.stat = yp_async_lookup_name(rqstp, nbuf,
 189                             AF_INET6);
 190                 else if (!strcmp(argp->map, "ipnodes.byaddr"))
 191                         result.stat = yp_async_lookup_addr(rqstp, nbuf,
 192                             AF_INET6);
 193
 194                 if (result.stat == YP_TRUE)
 195                         return(NULL);
 196         }
 197
 198         return (&result);
 199 }
 200
 201 ypresp_key_val *
 202 ypproc_first_2_svc(ypreq_nokey *argp, struct svc_req *rqstp)
 203 {
 204         static ypresp_key_val  result;
 205
 206         result.val.valdat_val = result.key.keydat_val = "";
 207         result.val.valdat_len = result.key.keydat_len = 0;
 208
 209 #ifdef DB_CACHE
 210         if (yp_access(argp->map, argp->domain, (struct svc_req *)rqstp)) {
 211 #else
 212         if (yp_access(argp->map, (struct svc_req *)rqstp)) {
 213 #endif
 214                 result.stat = YP_YPERR;
 215                 return (&result);
 216         }
 217
 218         if (argp->domain == NULL) {
 219                 result.stat = YP_BADARGS;
 220                 return (&result);
 221         }
 222
 223         if (yp_select_map(argp->map, argp->domain, NULL, 0) != YP_TRUE) {
 224                 result.stat = yp_errno;
 225                 return(&result);
 226         }
 227
 228         result.stat = yp_firstbykey(&result.key, &result.val);
 229
 230         return (&result);
 231 }
 232
 233 ypresp_key_val *
 234 ypproc_next_2_svc(ypreq_key *argp, struct svc_req *rqstp)
 235 {
 236         static ypresp_key_val  result;
 237
 238         result.val.valdat_val = result.key.keydat_val = "";
 239         result.val.valdat_len = result.key.keydat_len = 0;
 240
 241 #ifdef DB_CACHE
 242         if (yp_access(argp->map, argp->domain, (struct svc_req *)rqstp)) {
 243 #else
 244         if (yp_access(argp->map, (struct svc_req *)rqstp)) {
 245 #endif
 246                 result.stat = YP_YPERR;
 247                 return (&result);
 248         }
 249
 250         if (argp->domain == NULL || argp->map == NULL) {
 251                 result.stat = YP_BADARGS;
 252                 return (&result);
 253         }
 254
 255         if (yp_select_map(argp->map, argp->domain, &argp->key, 0) != YP_TRUE) {
 256                 result.stat = yp_errno;
 257                 return(&result);
 258         }
 259
 260         result.key.keydat_len = argp->key.keydat_len;
 261         result.key.keydat_val = argp->key.keydat_val;
 262
 263         result.stat = yp_nextbykey(&result.key, &result.val);
 264
 265         return (&result);
 266 }
 267
 268 static void
 269 ypxfr_callback(ypxfrstat rval, struct sockaddr_in *addr, unsigned int transid,
 270                unsigned int prognum, unsigned long port)
 271 {
 272         CLIENT *clnt;
 273         int sock = RPC_ANYSOCK;
 274         struct timeval timeout;
 275         yppushresp_xfr ypxfr_resp;
 276         struct rpc_err err;
 277
 278         timeout.tv_sec = 5;
 279         timeout.tv_usec = 0;
 280         addr->sin_port = htons(port);
 281
 282         if ((clnt = clntudp_create(addr,prognum,1,timeout,&sock)) == NULL) {
 283                 yp_error("%s: %s", inet_ntoa(addr->sin_addr),
 284                   clnt_spcreateerror("failed to establish callback handle"));
 285                 return;
 286         }
 287
 288         ypxfr_resp.status = rval;
 289         ypxfr_resp.transid = transid;
 290
 291         /* Turn the timeout off -- we don't want to block. */
 292         timeout.tv_sec = 0;
 293         if (clnt_control(clnt, CLSET_TIMEOUT, &timeout) == FALSE)
 294                 yp_error("failed to set timeout on ypproc_xfr callback");
 295
 296         if (yppushproc_xfrresp_1(&ypxfr_resp, clnt) == NULL) {
 297                 clnt_geterr(clnt, &err);
 298                 if (err.re_status != RPC_SUCCESS &&
 299                     err.re_status != RPC_TIMEDOUT)
 300                         yp_error("%s", clnt_sperror(clnt,
 301                                 "ypxfr callback failed"));
 302         }
 303
 304         clnt_destroy(clnt);
 305         return;
 306 }
 307
 308 #define YPXFR_RETURN(CODE)                                              \
 309         /* Order is important: send regular RPC reply, then callback */ \
 310         result.xfrstat = CODE;                                          \
 311         svc_sendreply(rqstp->rq_xprt, (xdrproc_t)xdr_ypresp_xfr, &result); \
 312         ypxfr_callback(CODE,rqhost,argp->transid,                       \
 313                                         argp->prog,argp->port);         \
 314         return(NULL);
 315
 316 ypresp_xfr *
 317 ypproc_xfr_2_svc(ypreq_xfr *argp, struct svc_req *rqstp)
 318 {
 319         static ypresp_xfr  result;
 320         struct sockaddr_in *rqhost;
 321         ypresp_master *mres;
 322         ypreq_nokey mreq;
 323
 324         result.transid = argp->transid;
 325         rqhost = svc_getcaller(rqstp->rq_xprt);
 326
 327 #ifdef DB_CACHE
 328         if (yp_access(argp->map_parms.map,
 329                         argp->map_parms.domain, (struct svc_req *)rqstp)) {
 330 #else
 331         if (yp_access(argp->map_parms.map, (struct svc_req *)rqstp)) {
 332 #endif
 333                 YPXFR_RETURN(YPXFR_REFUSED)
 334         }
 335
 336
 337         if (argp->map_parms.domain == NULL) {
 338                 YPXFR_RETURN(YPXFR_BADARGS)
 339         }
 340
 341         if (yp_validdomain(argp->map_parms.domain)) {
 342                 YPXFR_RETURN(YPXFR_NODOM)
 343         }
 344
 345         /*
 346          * Determine the master host ourselves. The caller may
 347          * be up to no good. This has the side effect of verifying
 348          * that the requested map and domain actually exist.
 349          */
 350
 351         mreq.domain = argp->map_parms.domain;
 352         mreq.map = argp->map_parms.map;
 353
 354         mres = ypproc_master_2_svc(&mreq, rqstp);
 355
 356         if (mres->stat != YP_TRUE) {
 357                 yp_error("couldn't find master for map %s@%s",
 358                                                 argp->map_parms.map,
 359                                                 argp->map_parms.domain);
 360                 yp_error("host at %s (%s) may be pulling my leg",
 361                                                 argp->map_parms.peer,
 362                                                 inet_ntoa(rqhost->sin_addr));
 363                 YPXFR_RETURN(YPXFR_REFUSED)
 364         }
 365
 366         switch (yp_fork()) {
 367         case 0:
 368         {
 369                 char g[11], t[11], p[11];
 370                 char ypxfr_command[MAXPATHLEN + 2];
 371
 372                 snprintf (ypxfr_command, sizeof(ypxfr_command), "%sypxfr", _PATH_LIBEXEC);
 373                 snprintf (t, sizeof(t), "%u", argp->transid);
 374                 snprintf (g, sizeof(g), "%u", argp->prog);
 375                 snprintf (p, sizeof(p), "%u", argp->port);
 376                 if (debug) {
 377                         close(0); close(1); close(2);
 378                 }
 379                 if (strcmp(yp_dir, _PATH_YP)) {
 380                         execl(ypxfr_command, "ypxfr",
 381                         "-d", argp->map_parms.domain,
 382                         "-h", mres->peer,
 383                         "-p", yp_dir, "-C", t,
 384                         g, inet_ntoa(rqhost->sin_addr),
 385                         p, argp->map_parms.map,
 386                         NULL);
 387                 } else {
 388                         execl(ypxfr_command, "ypxfr",
 389                         "-d", argp->map_parms.domain,
 390                         "-h", mres->peer,
 391                         "-C", t,
 392                         g, inet_ntoa(rqhost->sin_addr),
 393                         p, argp->map_parms.map,
 394                         NULL);
 395                 }
 396                 yp_error("ypxfr execl(%s): %s", ypxfr_command, strerror(errno));
 397                 YPXFR_RETURN(YPXFR_XFRERR)
 398                 /*
 399                  * Just to safe, prevent PR #10970 from biting us in
 400                  * the unlikely case that execing ypxfr fails. We don't
 401                  * want to have any child processes spawned from this
 402                  * child process.
 403                  */
 404                 _exit(0);
 405                 break;
 406         }
 407         case -1:
 408                 yp_error("ypxfr fork(): %s", strerror(errno));
 409                 YPXFR_RETURN(YPXFR_XFRERR)
 410                 break;
 411         default:
 412                 result.xfrstat = YPXFR_SUCC;
 413                 children++;
 414                 break;
 415         }
 416
 417         return (&result);
 418 }
 419 #undef YPXFR_RETURN
 420
 421 void *
 422 ypproc_clear_2_svc(void *argp, struct svc_req *rqstp)
 423 {
 424         static char * result;
 425         static char rval = 0;
 426
 427 #ifdef DB_CACHE
 428         if (yp_access(NULL, NULL, (struct svc_req *)rqstp))
 429 #else
 430         if (yp_access(NULL, (struct svc_req *)rqstp))
 431 #endif
 432                 return (NULL);
 433 #ifdef DB_CACHE
 434         /* clear out the database cache */
 435         yp_flush_all();
 436 #endif
 437         /* Re-read the securenets database for the hell of it. */
 438         load_securenets();
 439
 440         result = &rval;
 441         return((void *) &result);
 442 }
 443
 444 /*
 445  * For ypproc_all, we have to send a stream of ypresp_all structures
 446  * via TCP, but the XDR filter generated from the yp.x protocol
 447  * definition file only serializes one such structure. This means that
 448  * to send the whole stream, you need a wrapper which feeds all the
 449  * records into the underlying XDR routine until it hits an 'EOF.'
 450  * But to use the wrapper, you have to violate the boundaries between
 451  * RPC layers by calling svc_sendreply() directly from the ypproc_all
 452  * service routine instead of letting the RPC dispatcher do it.
 453  *
 454  * Bleah.
 455  */
 456
 457 /*
 458  * Custom XDR routine for serialzing results of ypproc_all: keep
 459  * reading from the database and spew until we run out of records
 460  * or encounter an error.
 461  */
 462 static bool_t
 463 xdr_my_ypresp_all(XDR *xdrs, ypresp_all *objp)
 464 {
 465         while (1) {
 466                 /* Get a record. */
 467                 if ((objp->ypresp_all_u.val.stat =
 468                         yp_nextbykey(&objp->ypresp_all_u.val.key,
 469                                      &objp->ypresp_all_u.val.val)) == YP_TRUE) {
 470                         objp->more = TRUE;
 471                 } else {
 472                         objp->more = FALSE;
 473                 }
 474
 475                 /* Serialize. */
 476                 if (!xdr_ypresp_all(xdrs, objp))
 477                         return(FALSE);
 478                 if (objp->more == FALSE)
 479                         return(TRUE);
 480         }
 481 }
 482
 483 ypresp_all *
 484 ypproc_all_2_svc(ypreq_nokey *argp, struct svc_req *rqstp)
 485 {
 486         static ypresp_all  result;
 487
 488         /*
 489          * Set this here so that the client will be forced to make
 490          * at least one attempt to read from us even if all we're
 491          * doing is returning an error.
 492          */
 493         result.more = TRUE;
 494         result.ypresp_all_u.val.key.keydat_len = 0;
 495         result.ypresp_all_u.val.key.keydat_val = "";
 496
 497 #ifdef DB_CACHE
 498         if (yp_access(argp->map, argp->domain, (struct svc_req *)rqstp)) {
 499 #else
 500         if (yp_access(argp->map, (struct svc_req *)rqstp)) {
 501 #endif
 502                 result.ypresp_all_u.val.stat = YP_YPERR;
 503                 return (&result);
 504         }
 505
 506         if (argp->domain == NULL || argp->map == NULL) {
 507                 result.ypresp_all_u.val.stat = YP_BADARGS;
 508                 return (&result);
 509         }
 510
 511         /*
 512          * XXX If we hit the child limit, fail the request.
 513          * If we don't, and the map is large, we could block for
 514          * a long time in the parent.
 515          */
 516         if (children >= MAX_CHILDREN) {
 517                 result.ypresp_all_u.val.stat = YP_YPERR;
 518                 return(&result);
 519         }
 520
 521         /*
 522          * The ypproc_all procedure can take a while to complete.
 523          * Best to handle it in a subprocess so the parent doesn't
 524          * block. (Is there a better way to do this? Maybe with
 525          * async socket I/O?)
 526          */
 527         if (!debug) {
 528                 switch (yp_fork()) {
 529                 case 0:
 530                         break;
 531                 case -1:
 532                         yp_error("ypall fork(): %s", strerror(errno));
 533                         result.ypresp_all_u.val.stat = YP_YPERR;
 534                         return(&result);
 535                         break;
 536                 default:
 537                         children++;
 538                         return (NULL);
 539                         break;
 540                 }
 541         }
 542
 543         /*
 544          * Fix for PR #10971: don't let the child ypserv share
 545          * DB handles with the parent process.
 546          */
 547 #ifdef DB_CACHE
 548         yp_flush_all();
 549 #endif
 550
 551         if (yp_select_map(argp->map, argp->domain,
 552                                 &result.ypresp_all_u.val.key, 0) != YP_TRUE) {
 553                 result.ypresp_all_u.val.stat = yp_errno;
 554                 return(&result);
 555         }
 556
 557         /* Kick off the actual data transfer. */
 558         svc_sendreply(rqstp->rq_xprt, (xdrproc_t)xdr_my_ypresp_all, &result);
 559
 560         /*
 561          * Proper fix for PR #10970: exit here so that we don't risk
 562          * having a child spawned from this sub-process.
 563          */
 564         _exit(0);
 565 }
 566
 567 ypresp_master *
 568 ypproc_master_2_svc(ypreq_nokey *argp, struct svc_req *rqstp)
 569 {
 570         static ypresp_master  result;
 571         static char ypvalbuf[YPMAXRECORD];
 572         keydat key = { MASTER_SZ, MASTER_STRING };
 573         valdat val;
 574
 575         result.peer = "";
 576
 577 #ifdef DB_CACHE
 578         if (yp_access(argp->map, argp->domain, (struct svc_req *)rqstp)) {
 579 #else
 580         if (yp_access(argp->map, (struct svc_req *)rqstp)) {
 581 #endif
 582                 result.stat = YP_YPERR;
 583                 return(&result);
 584         }
 585
 586         if (argp->domain == NULL) {
 587                 result.stat = YP_BADARGS;
 588                 return (&result);
 589         }
 590
 591         if (yp_select_map(argp->map, argp->domain, &key, 1) != YP_TRUE) {
 592                 result.stat = yp_errno;
 593                 return(&result);
 594         }
 595
 596         /*
 597          * Note that we copy the data retrieved from the database to
 598          * a private buffer and NUL terminate the buffer rather than
 599          * terminating the data in place. We do this because by stuffing
 600          * a '\0' into data.data, we will actually be corrupting memory
 601          * allocated by the DB package. This is a bad thing now that we
 602          * cache DB handles rather than closing the database immediately.
 603          */
 604         result.stat = yp_getbykey(&key, &val);
 605         if (result.stat == YP_TRUE) {
 606                 bcopy(val.valdat_val, &ypvalbuf, val.valdat_len);
 607                 ypvalbuf[val.valdat_len] = '\0';
 608                 result.peer = ypvalbuf;
 609         } else
 610                 result.peer = "";
 611
 612         return (&result);
 613 }
 614
 615 ypresp_order *
 616 ypproc_order_2_svc(ypreq_nokey *argp, struct svc_req *rqstp)
 617 {
 618         static ypresp_order  result;
 619         keydat key = { ORDER_SZ, ORDER_STRING };
 620         valdat val;
 621
 622         result.ordernum = 0;
 623
 624 #ifdef DB_CACHE
 625         if (yp_access(argp->map, argp->domain, (struct svc_req *)rqstp)) {
 626 #else
 627         if (yp_access(argp->map, (struct svc_req *)rqstp)) {
 628 #endif
 629                 result.stat = YP_YPERR;
 630                 return(&result);
 631         }
 632
 633         if (argp->domain == NULL) {
 634                 result.stat = YP_BADARGS;
 635                 return (&result);
 636         }
 637
 638         /*
 639          * We could just check the timestamp on the map file,
 640          * but that's a hack: we'll only know the last time the file
 641          * was touched, not the last time the database contents were
 642          * updated.
 643          */
 644
 645         if (yp_select_map(argp->map, argp->domain, &key, 1) != YP_TRUE) {
 646                 result.stat = yp_errno;
 647                 return(&result);
 648         }
 649
 650         result.stat = yp_getbykey(&key, &val);
 651
 652         if (result.stat == YP_TRUE)
 653                 result.ordernum = atoi(val.valdat_val);
 654         else
 655                 result.ordernum = 0;
 656
 657         return (&result);
 658 }
 659
 660 static void
 661 yp_maplist_free(struct ypmaplist *yp_maplist)
 662 {
 663         struct ypmaplist *next;
 664
 665         while (yp_maplist) {
 666                 next = yp_maplist->next;
 667                 free(yp_maplist->map);
 668                 free(yp_maplist);
 669                 yp_maplist = next;
 670         }
 671         return;
 672 }
 673
 674 static struct ypmaplist *
 675 yp_maplist_create(const char *domain)
 676 {
 677         char yp_mapdir[MAXPATHLEN + 2];
 678         char yp_mapname[MAXPATHLEN + 2];
 679         struct ypmaplist *cur = NULL;
 680         struct ypmaplist *yp_maplist = NULL;
 681         DIR *dird;
 682         struct dirent *dirp;
 683         struct stat statbuf;
 684
 685         snprintf(yp_mapdir, sizeof(yp_mapdir), "%s/%s", yp_dir, domain);
 686
 687         if ((dird = opendir(yp_mapdir)) == NULL) {
 688                 yp_error("opendir(%s) failed: %s", yp_mapdir, strerror(errno));
 689                 return(NULL);
 690         }
 691
 692         while ((dirp = readdir(dird)) != NULL) {
 693                 if (strcmp(dirp->d_name, ".") && strcmp(dirp->d_name, "..")) {
 694                         snprintf(yp_mapname, sizeof(yp_mapname), "%s/%s",
 695                                                         yp_mapdir,dirp->d_name);
 696                         if (stat(yp_mapname, &statbuf) < 0 ||
 697                                                 !S_ISREG(statbuf.st_mode))
 698                                 continue;
 699                         if ((cur = (struct ypmaplist *)
 700                                 malloc(sizeof(struct ypmaplist))) == NULL) {
 701                                 yp_error("malloc() failed");
 702                                 closedir(dird);
 703                                 yp_maplist_free(yp_maplist);
 704                                 return(NULL);
 705                         }
 706                         if ((cur->map = strdup(dirp->d_name)) == NULL) {
 707                                 yp_error("strdup() failed: %s",strerror(errno));
 708                                 closedir(dird);
 709                                 yp_maplist_free(yp_maplist);
 710                                 free(cur);
 711                                 return(NULL);
 712                         }
 713                         cur->next = yp_maplist;
 714                         yp_maplist = cur;
 715                         if (debug)
 716                                 yp_error("map: %s", yp_maplist->map);
 717                 }
 718
 719         }
 720         closedir(dird);
 721         return(yp_maplist);
 722 }
 723
 724 ypresp_maplist *
 725 ypproc_maplist_2_svc(domainname *argp, struct svc_req *rqstp)
 726 {
 727         static ypresp_maplist  result = { 0, NULL };
 728
 729 #ifdef DB_CACHE
 730         if (yp_access(NULL, NULL, (struct svc_req *)rqstp)) {
 731 #else
 732         if (yp_access(NULL, (struct svc_req *)rqstp)) {
 733 #endif
 734                 result.stat = YP_YPERR;
 735                 return(&result);
 736         }
 737
 738         if (argp == NULL) {
 739                 result.stat = YP_BADARGS;
 740                 return (&result);
 741         }
 742
 743         if (yp_validdomain(*argp)) {
 744                 result.stat = YP_NODOM;
 745                 return (&result);
 746         }
 747
 748         /*
 749          * We have to construct a linked list for the ypproc_maplist
 750          * procedure using dynamically allocated memory. Since the XDR
 751          * layer won't free this list for us, we have to deal with it
 752          * ourselves. We call yp_maplist_free() first to free any
 753          * previously allocated data we may have accumulated to insure
 754          * that we have only one linked list in memory at any given
 755          * time.
 756          */
 757
 758         yp_maplist_free(result.maps);
 759
 760         if ((result.maps = yp_maplist_create(*argp)) == NULL) {
 761                 yp_error("yp_maplist_create failed");
 762                 result.stat = YP_YPERR;
 763                 return(&result);
 764         } else
 765                 result.stat = YP_TRUE;
 766
 767         return (&result);
 768 }
 769
 770 /*
 771  * NIS v1 support. The nullproc, domain and domain_nonack
 772  * functions from v1 are identical to those in v2, so all
 773  * we have to do is hand off to them.
 774  *
 775  * The other functions are mostly just wrappers around their v2
 776  * counterparts. For example, for the v1 'match' procedure, we
 777  * crack open the argument structure, make a request to the v2
 778  * 'match' function, repackage the data into a v1 response and
 779  * then send it on its way.
 780  *
 781  * Note that we don't support the pull, push and get procedures.
 782  * There's little documentation available to show what they
 783  * do, and I suspect they're meant largely for map transfers
 784  * between master and slave servers.
 785  */
 786
 787 void *
 788 ypoldproc_null_1_svc(void *argp, struct svc_req *rqstp)
 789 {
 790         return(ypproc_null_2_svc(argp, rqstp));
 791 }
 792
 793 bool_t *
 794 ypoldproc_domain_1_svc(domainname *argp, struct svc_req *rqstp)
 795 {
 796         return(ypproc_domain_2_svc(argp, rqstp));
 797 }
 798
 799 bool_t *
 800 ypoldproc_domain_nonack_1_svc(domainname *argp, struct svc_req *rqstp)
 801 {
 802         return (ypproc_domain_nonack_2_svc(argp, rqstp));
 803 }
 804
 805 /*
 806  * the 'match' procedure sends a response of type YPRESP_VAL
 807  */
 808 ypresponse *
 809 ypoldproc_match_1_svc(yprequest *argp, struct svc_req *rqstp)
 810 {
 811         static ypresponse  result;
 812         ypresp_val *v2_result;
 813
 814         result.yp_resptype = YPRESP_VAL;
 815         result.ypresponse_u.yp_resp_valtype.val.valdat_val = "";
 816         result.ypresponse_u.yp_resp_valtype.val.valdat_len = 0;
 817
 818         if (argp->yp_reqtype != YPREQ_KEY) {
 819                 result.ypresponse_u.yp_resp_valtype.stat = YP_BADARGS;
 820                 return(&result);
 821         }
 822
 823         v2_result = ypproc_match_2_svc(&argp->yprequest_u.yp_req_keytype,rqstp);
 824         if (v2_result == NULL)
 825                 return(NULL);
 826
 827         bcopy(v2_result, &result.ypresponse_u.yp_resp_valtype,
 828               sizeof(ypresp_val));
 829
 830         return (&result);
 831 }
 832
 833 /*
 834  * the 'first' procedure sends a response of type YPRESP_KEY_VAL
 835  */
 836 ypresponse *
 837 ypoldproc_first_1_svc(yprequest *argp, struct svc_req *rqstp)
 838 {
 839         static ypresponse  result;
 840         ypresp_key_val *v2_result;
 841
 842         result.yp_resptype = YPRESP_KEY_VAL;
 843         result.ypresponse_u.yp_resp_key_valtype.val.valdat_val =
 844         result.ypresponse_u.yp_resp_key_valtype.key.keydat_val = "";
 845         result.ypresponse_u.yp_resp_key_valtype.val.valdat_len =
 846         result.ypresponse_u.yp_resp_key_valtype.key.keydat_len = 0;
 847
 848         if (argp->yp_reqtype != YPREQ_NOKEY) {
 849                 result.ypresponse_u.yp_resp_key_valtype.stat = YP_BADARGS;
 850                 return(&result);
 851         }
 852
 853         v2_result = ypproc_first_2_svc(&argp->yprequest_u.yp_req_nokeytype,
 854                                                                         rqstp);
 855         if (v2_result == NULL)
 856                 return(NULL);
 857
 858         bcopy(v2_result, &result.ypresponse_u.yp_resp_key_valtype,
 859               sizeof(ypresp_key_val));
 860
 861         return (&result);
 862 }
 863
 864 /*
 865  * the 'next' procedure sends a response of type YPRESP_KEY_VAL
 866  */
 867 ypresponse *
 868 ypoldproc_next_1_svc(yprequest *argp, struct svc_req *rqstp)
 869 {
 870         static ypresponse  result;
 871         ypresp_key_val *v2_result;
 872
 873         result.yp_resptype = YPRESP_KEY_VAL;
 874         result.ypresponse_u.yp_resp_key_valtype.val.valdat_val =
 875         result.ypresponse_u.yp_resp_key_valtype.key.keydat_val = "";
 876         result.ypresponse_u.yp_resp_key_valtype.val.valdat_len =
 877         result.ypresponse_u.yp_resp_key_valtype.key.keydat_len = 0;
 878
 879         if (argp->yp_reqtype != YPREQ_KEY) {
 880                 result.ypresponse_u.yp_resp_key_valtype.stat = YP_BADARGS;
 881                 return(&result);
 882         }
 883
 884         v2_result = ypproc_next_2_svc(&argp->yprequest_u.yp_req_keytype,rqstp);
 885         if (v2_result == NULL)
 886                 return(NULL);
 887
 888         bcopy(v2_result, &result.ypresponse_u.yp_resp_key_valtype,
 889               sizeof(ypresp_key_val));
 890
 891         return (&result);
 892 }
 893
 894 /*
 895  * the 'poll' procedure sends a response of type YPRESP_MAP_PARMS
 896  */
 897 ypresponse *
 898 ypoldproc_poll_1_svc(yprequest *argp, struct svc_req *rqstp)
 899 {
 900         static ypresponse  result;
 901         ypresp_master *v2_result1;
 902         ypresp_order *v2_result2;
 903
 904         result.yp_resptype = YPRESP_MAP_PARMS;
 905         result.ypresponse_u.yp_resp_map_parmstype.domain =
 906                 argp->yprequest_u.yp_req_nokeytype.domain;
 907         result.ypresponse_u.yp_resp_map_parmstype.map =
 908                 argp->yprequest_u.yp_req_nokeytype.map;
 909         /*
 910          * Hmm... there is no 'status' value in the
 911          * yp_resp_map_parmstype structure, so I have to
 912          * guess at what to do to indicate a failure.
 913          * I hope this is right.
 914          */
 915         result.ypresponse_u.yp_resp_map_parmstype.ordernum = 0;
 916         result.ypresponse_u.yp_resp_map_parmstype.peer = "";
 917
 918         if (argp->yp_reqtype != YPREQ_MAP_PARMS) {
 919                 return(&result);
 920         }
 921
 922         v2_result1 = ypproc_master_2_svc(&argp->yprequest_u.yp_req_nokeytype,
 923                                                                         rqstp);
 924         if (v2_result1 == NULL)
 925                 return(NULL);
 926
 927         if (v2_result1->stat != YP_TRUE) {
 928                 return(&result);
 929         }
 930
 931         v2_result2 = ypproc_order_2_svc(&argp->yprequest_u.yp_req_nokeytype,
 932                                                                         rqstp);
 933         if (v2_result2 == NULL)
 934                 return(NULL);
 935
 936         if (v2_result2->stat != YP_TRUE) {
 937                 return(&result);
 938         }
 939
 940         result.ypresponse_u.yp_resp_map_parmstype.peer =
 941                 v2_result1->peer;
 942         result.ypresponse_u.yp_resp_map_parmstype.ordernum =
 943                 v2_result2->ordernum;
 944
 945         return (&result);
 946 }
 947
 948 ypresponse *
 949 ypoldproc_push_1_svc(yprequest *argp, struct svc_req *rqstp)
 950 {
 951         static ypresponse  result;
 952
 953         /*
 954          * Not implemented.
 955          */
 956
 957         return (&result);
 958 }
 959
 960 ypresponse *
 961 ypoldproc_pull_1_svc(yprequest *argp, struct svc_req *rqstp)
 962 {
 963         static ypresponse  result;
 964
 965         /*
 966          * Not implemented.
 967          */
 968
 969         return (&result);
 970 }
 971
 972 ypresponse *
 973 ypoldproc_get_1_svc(yprequest *argp, struct svc_req *rqstp)
 974 {
 975         static ypresponse  result;
 976
 977         /*
 978          * Not implemented.
 979          */
 980
 981         return (&result);
 982 }