lib/libcr/yp/yplib.c

   1 /*
   2  * Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca>
   3  * Copyright (c) 1998 Bill Paul <wpaul@ctr.columbia.edu>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote
  15  *    products derived from this software without specific prior written
  16  *    permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  19  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  * $FreeBSD: src/lib/libc/yp/yplib.c,v 1.34.2.2 2002/02/15 00:46:53 des Exp $
  31  * $DragonFly: src/lib/libcr/yp/Attic/yplib.c,v 1.2 2003/06/17 04:26:47 dillon Exp $
  32  */
  33
  34 #include <sys/param.h>
  35 #include <sys/types.h>
  36 #include <sys/socket.h>
  37 #include <sys/file.h>
  38 #include <sys/uio.h>
  39 #include <errno.h>
  40 #include <stdio.h>
  41 #include <string.h>
  42 #include <stdlib.h>
  43 #include <unistd.h>
  44 #include <rpc/rpc.h>
  45 #include <rpc/xdr.h>
  46 #include <rpcsvc/yp.h>
  47
  48 /*
  49  * We have to define these here due to clashes between yp_prot.h and
  50  * yp.h.
  51  */
  52
  53 #define YPMATCHCACHE
  54
  55 #ifdef YPMATCHCACHE
  56 struct ypmatch_ent {
  57         char                    *ypc_map;
  58         keydat                  ypc_key;
  59         valdat                  ypc_val;
  60         time_t                  ypc_expire_t;
  61         struct ypmatch_ent      *ypc_next;
  62 };
  63 #define YPLIB_MAXCACHE  5       /* At most 5 entries */
  64 #define YPLIB_EXPIRE    5       /* Expire after 5 seconds */
  65 #endif
  66
  67 struct dom_binding {
  68         struct dom_binding *dom_pnext;
  69         char dom_domain[YPMAXDOMAIN + 1];
  70         struct sockaddr_in dom_server_addr;
  71         u_short dom_server_port;
  72         int dom_socket;
  73         CLIENT *dom_client;
  74         u_short dom_local_port; /* now I finally know what this is for. */
  75         long dom_vers;
  76 #ifdef YPMATCHCACHE
  77         struct ypmatch_ent *cache;
  78         int ypmatch_cachecnt;
  79 #endif
  80 };
  81
  82 #include <rpcsvc/ypclnt.h>
  83
  84 #ifndef BINDINGDIR
  85 #define BINDINGDIR "/var/yp/binding"
  86 #endif
  87 #define MAX_RETRIES 20
  88
  89 extern bool_t xdr_domainname(), xdr_ypbind_resp();
  90 extern bool_t xdr_ypreq_key(), xdr_ypresp_val();
  91 extern bool_t xdr_ypreq_nokey(), xdr_ypresp_key_val();
  92 extern bool_t xdr_ypresp_all(), xdr_ypresp_all_seq();
  93 extern bool_t xdr_ypresp_master();
  94
  95 int (*ypresp_allfn)();
  96 void *ypresp_data;
  97
  98 static void _yp_unbind(struct dom_binding *);
  99 struct dom_binding *_ypbindlist;
 100 static char _yp_domain[MAXHOSTNAMELEN];
 101 int _yplib_timeout = 10;
 102
 103 #ifdef YPMATCHCACHE
 104 static void ypmatch_cache_delete(ypdb, prev, cur)
 105         struct dom_binding      *ypdb;
 106         struct ypmatch_ent      *prev;
 107         struct ypmatch_ent      *cur;
 108 {
 109         if (prev == NULL)
 110                 ypdb->cache = cur->ypc_next;
 111         else
 112                 prev->ypc_next = cur->ypc_next;
 113
 114         free(cur->ypc_map);
 115         free(cur->ypc_key.keydat_val);
 116         free(cur->ypc_val.valdat_val);
 117         free(cur);
 118
 119         ypdb->ypmatch_cachecnt--;
 120
 121         return;
 122 }
 123
 124 static void ypmatch_cache_flush(ypdb)
 125         struct dom_binding      *ypdb;
 126 {
 127         struct ypmatch_ent      *n, *c = ypdb->cache;
 128
 129         while (c != NULL) {
 130                 n = c->ypc_next;
 131                 ypmatch_cache_delete(ypdb, NULL, c);
 132                 c = n;
 133         }
 134
 135         return;
 136 }
 137
 138 static void ypmatch_cache_expire(ypdb)
 139         struct dom_binding      *ypdb;
 140 {
 141         struct ypmatch_ent      *c = ypdb->cache;
 142         struct ypmatch_ent      *n, *p = NULL;
 143         time_t                  t;
 144
 145         time(&t);
 146
 147         while (c != NULL) {
 148                 if (t >= c->ypc_expire_t) {
 149                         n = c->ypc_next;
 150                         ypmatch_cache_delete(ypdb, p, c);
 151                         c = n;
 152                 } else {
 153                         p = c;
 154                         c = c->ypc_next;
 155                 }
 156         }
 157
 158         return;
 159 }
 160
 161 static void ypmatch_cache_insert(ypdb, map, key, val)
 162         struct dom_binding      *ypdb;
 163         char                    *map;
 164         keydat                  *key;
 165         valdat                  *val;
 166 {
 167         struct ypmatch_ent      *new;
 168
 169         /* Do an expire run to maybe open up a slot. */
 170         if (ypdb->ypmatch_cachecnt)
 171                 ypmatch_cache_expire(ypdb);
 172
 173         /*
 174          * If there are no slots free, then force an expire of
 175          * the least recently used entry.
 176          */
 177         if (ypdb->ypmatch_cachecnt >= YPLIB_MAXCACHE) {
 178                 struct ypmatch_ent      *o = NULL, *c = ypdb->cache;
 179                 time_t                  oldest = 0;
 180
 181                 oldest = ~oldest;
 182
 183                 while (c != NULL) {
 184                         if (c->ypc_expire_t < oldest) {
 185                                 oldest = c->ypc_expire_t;
 186                                 o = c;
 187                         }
 188                         c = c->ypc_next;
 189                 }
 190
 191                 if (o == NULL)
 192                         return;
 193                 o->ypc_expire_t = 0;
 194                 ypmatch_cache_expire(ypdb);
 195         }
 196
 197         new = malloc(sizeof(struct ypmatch_ent));
 198         if (new == NULL)
 199                 return;
 200
 201         new->ypc_map = strdup(map);
 202         if (new->ypc_map == NULL) {
 203                 free(new);
 204                 return;
 205         }
 206         new->ypc_key.keydat_val = malloc(key->keydat_len);
 207         if (new->ypc_key.keydat_val == NULL) {
 208                 free(new->ypc_map);
 209                 free(new);
 210                 return;
 211         }
 212         new->ypc_val.valdat_val = malloc(val->valdat_len);
 213         if (new->ypc_val.valdat_val == NULL) {
 214                 free(new->ypc_val.valdat_val);
 215                 free(new->ypc_map);
 216                 free(new);
 217                 return;
 218         }
 219
 220         new->ypc_expire_t = time(NULL) + YPLIB_EXPIRE;
 221         new->ypc_key.keydat_len = key->keydat_len;
 222         new->ypc_val.valdat_len = val->valdat_len;
 223         bcopy(key->keydat_val, new->ypc_key.keydat_val, key->keydat_len);
 224         bcopy(val->valdat_val, new->ypc_val.valdat_val, val->valdat_len);
 225
 226         new->ypc_next = ypdb->cache;
 227         ypdb->cache = new;
 228
 229         ypdb->ypmatch_cachecnt++;
 230
 231         return;
 232 }
 233
 234 static bool_t ypmatch_cache_lookup(ypdb, map, key, val)
 235         struct dom_binding      *ypdb;
 236         char                    *map;
 237         keydat                  *key;
 238         valdat                  *val;
 239 {
 240         struct ypmatch_ent      *c = ypdb->cache;
 241
 242         ypmatch_cache_expire(ypdb);
 243
 244         for (c = ypdb->cache; c != NULL; c = c->ypc_next) {
 245                 if (strcmp(map, c->ypc_map))
 246                         continue;
 247                 if (key->keydat_len != c->ypc_key.keydat_len)
 248                         continue;
 249                 if (bcmp(key->keydat_val, c->ypc_key.keydat_val,
 250                                 key->keydat_len))
 251                         continue;
 252         }
 253
 254         if (c == NULL)
 255                 return(FALSE);
 256
 257         val->valdat_len = c->ypc_val.valdat_len;
 258         val->valdat_val = c->ypc_val.valdat_val;
 259
 260         return(TRUE);
 261 }
 262 #endif
 263
 264 char *
 265 ypbinderr_string(incode)
 266         int incode;
 267 {
 268         static char err[80];
 269         switch (incode) {
 270         case 0:
 271                 return ("Success");
 272         case YPBIND_ERR_ERR:
 273                 return ("Internal ypbind error");
 274         case YPBIND_ERR_NOSERV:
 275                 return ("Domain not bound");
 276         case YPBIND_ERR_RESC:
 277                 return ("System resource allocation failure");
 278         }
 279         sprintf(err, "Unknown ypbind error: #%d\n", incode);
 280         return (err);
 281 }
 282
 283 int
 284 _yp_dobind(dom, ypdb)
 285         char *dom;
 286         struct dom_binding **ypdb;
 287 {
 288         static pid_t pid = -1;
 289         char path[MAXPATHLEN];
 290         struct dom_binding *ysd, *ysd2;
 291         struct ypbind_resp ypbr;
 292         struct timeval tv;
 293         struct sockaddr_in clnt_sin;
 294         int clnt_sock, fd;
 295         pid_t gpid;
 296         CLIENT *client;
 297         int new = 0, r;
 298         int retries = 0;
 299         struct sockaddr_in check;
 300         int checklen = sizeof(struct sockaddr_in);
 301
 302         /* Not allowed; bad doggie. Bad. */
 303         if (strchr(dom, '/') != NULL)
 304                 return(YPERR_BADARGS);
 305
 306         gpid = getpid();
 307         if (!(pid == -1 || pid == gpid)) {
 308                 ysd = _ypbindlist;
 309                 while (ysd) {
 310                         if (ysd->dom_client != NULL)
 311                                 _yp_unbind(ysd);
 312                         ysd2 = ysd->dom_pnext;
 313                         free(ysd);
 314                         ysd = ysd2;
 315                 }
 316                 _ypbindlist = NULL;
 317         }
 318         pid = gpid;
 319
 320         if (ypdb != NULL)
 321                 *ypdb = NULL;
 322
 323         if (dom == NULL || strlen(dom) == 0)
 324                 return (YPERR_BADARGS);
 325
 326         for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
 327                 if (strcmp(dom, ysd->dom_domain) == 0)
 328                         break;
 329
 330
 331         if (ysd == NULL) {
 332                 ysd = (struct dom_binding *)malloc(sizeof *ysd);
 333                 bzero((char *)ysd, sizeof *ysd);
 334                 ysd->dom_socket = -1;
 335                 ysd->dom_vers = 0;
 336                 new = 1;
 337         } else {
 338         /* Check the socket -- may have been hosed by the caller. */
 339                 if (getsockname(ysd->dom_socket, (struct sockaddr *)&check,
 340                     &checklen) == -1 || check.sin_family != AF_INET ||
 341                     check.sin_port != ysd->dom_local_port) {
 342                 /* Socket became bogus somehow... need to rebind. */
 343                         int save, sock;
 344
 345                         sock = ysd->dom_socket;
 346                         save = dup(ysd->dom_socket);
 347                         if (ysd->dom_client != NULL)
 348                                 clnt_destroy(ysd->dom_client);
 349                         ysd->dom_vers = 0;
 350                         ysd->dom_client = NULL;
 351                         sock = dup2(save, sock);
 352                         _close(save);
 353                 }
 354         }
 355
 356 again:
 357         retries++;
 358         if (retries > MAX_RETRIES) {
 359                 if (new)
 360                         free(ysd);
 361                 return(YPERR_YPBIND);
 362         }
 363 #ifdef BINDINGDIR
 364         if (ysd->dom_vers == 0) {
 365                 /*
 366                  * We're trying to make a new binding: zorch the
 367                  * existing handle now (if any).
 368                  */
 369                 if (ysd->dom_client != NULL) {
 370                         clnt_destroy(ysd->dom_client);
 371                         ysd->dom_client = NULL;
 372                         ysd->dom_socket = -1;
 373                 }
 374                 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2);
 375                 if ((fd = _open(path, O_RDONLY)) == -1) {
 376                         /* no binding file, YP is dead. */
 377                         /* Try to bring it back to life. */
 378                         _close(fd);
 379                         goto skipit;
 380                 }
 381                 if (flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
 382                         struct iovec iov[2];
 383                         struct ypbind_resp ybr;
 384                         u_short ypb_port;
 385
 386                         iov[0].iov_base = (caddr_t)&ypb_port;
 387                         iov[0].iov_len = sizeof ypb_port;
 388                         iov[1].iov_base = (caddr_t)&ybr;
 389                         iov[1].iov_len = sizeof ybr;
 390
 391                         r = readv(fd, iov, 2);
 392                         if (r != iov[0].iov_len + iov[1].iov_len) {
 393                                 _close(fd);
 394                                 ysd->dom_vers = -1;
 395                                 goto again;
 396                         }
 397
 398                         bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
 399                         ysd->dom_server_addr.sin_family = AF_INET;
 400                         ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
 401                         ysd->dom_server_addr.sin_addr.s_addr =
 402                             *(u_long *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
 403                         ysd->dom_server_addr.sin_port =
 404                             *(u_short *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 405
 406                         ysd->dom_server_port = ysd->dom_server_addr.sin_port;
 407                         _close(fd);
 408                         goto gotit;
 409                 } else {
 410                         /* no lock on binding file, YP is dead. */
 411                         /* Try to bring it back to life. */
 412                         _close(fd);
 413                         goto skipit;
 414                 }
 415         }
 416 skipit:
 417 #endif
 418         if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
 419                 /*
 420                  * We're trying to make a new binding: zorch the
 421                  * existing handle now (if any).
 422                  */
 423                 if (ysd->dom_client != NULL) {
 424                         clnt_destroy(ysd->dom_client);
 425                         ysd->dom_client = NULL;
 426                         ysd->dom_socket = -1;
 427                 }
 428                 bzero((char *)&clnt_sin, sizeof clnt_sin);
 429                 clnt_sin.sin_family = AF_INET;
 430                 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 431
 432                 clnt_sock = RPC_ANYSOCK;
 433                 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
 434                         0, 0);
 435                 if (client == NULL) {
 436                         /*
 437                          * These conditions indicate ypbind just isn't
 438                          * alive -- we probably don't want to shoot our
 439                          * mouth off in this case; instead generate error
 440                          * messages only for really exotic problems.
 441                          */
 442                         if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED &&
 443                            (rpc_createerr.cf_stat != RPC_SYSTEMERROR &&
 444                            rpc_createerr.cf_error.re_errno == ECONNREFUSED))
 445                                 clnt_pcreateerror("clnttcp_create");
 446                         if (new)
 447                                 free(ysd);
 448                         return (YPERR_YPBIND);
 449                 }
 450
 451                 /*
 452                  * Check the port number -- should be < IPPORT_RESERVED.
 453                  * If not, it's possible someone has registered a bogus
 454                  * ypbind with the portmapper and is trying to trick us.
 455                  */
 456                 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) {
 457                         if (client != NULL)
 458                                 clnt_destroy(client);
 459                         if (new)
 460                                 free(ysd);
 461                         return(YPERR_YPBIND);
 462                 }
 463                 tv.tv_sec = _yplib_timeout/2;
 464                 tv.tv_usec = 0;
 465                 r = clnt_call(client, YPBINDPROC_DOMAIN,
 466                         xdr_domainname, (char *)&dom, xdr_ypbind_resp, &ypbr, tv);
 467                 if (r != RPC_SUCCESS) {
 468                         clnt_destroy(client);
 469                         ysd->dom_vers = -1;
 470                         if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) {
 471                                 if (new)
 472                                         free(ysd);
 473                                 return(YPERR_YPBIND);
 474                         }
 475                         fprintf(stderr,
 476                         "YP: server for domain %s not responding, retrying\n", dom);
 477                         goto again;
 478                 } else {
 479                         if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
 480                                 struct timespec time_to_sleep, time_remaining;
 481
 482                                 clnt_destroy(client);
 483                                 ysd->dom_vers = -1;
 484
 485                                 time_to_sleep.tv_sec = _yplib_timeout/2;
 486                                 time_to_sleep.tv_nsec = 0;
 487                                 _nanosleep(&time_to_sleep,
 488                                     &time_remaining);
 489                                 goto again;
 490                         }
 491                 }
 492                 clnt_destroy(client);
 493
 494                 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
 495                 ysd->dom_server_addr.sin_family = AF_INET;
 496                 ysd->dom_server_addr.sin_port =
 497                         *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 498                 ysd->dom_server_addr.sin_addr.s_addr =
 499                         *(u_long *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
 500
 501                 /*
 502                  * We could do a reserved port check here too, but this
 503                  * could pose compatibility problems. The local ypbind is
 504                  * supposed to decide whether or not to trust yp servers
 505                  * on insecure ports. For now, we trust its judgement.
 506                  */
 507                 ysd->dom_server_port =
 508                         *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 509 gotit:
 510                 ysd->dom_vers = YPVERS;
 511                 strlcpy(ysd->dom_domain, dom, sizeof(ysd->dom_domain));
 512         }
 513
 514         /* Don't rebuild the connection to the server unless we have to. */
 515         if (ysd->dom_client == NULL) {
 516                 tv.tv_sec = _yplib_timeout/2;
 517                 tv.tv_usec = 0;
 518                 ysd->dom_socket = RPC_ANYSOCK;
 519                 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr,
 520                         YPPROG, YPVERS, tv, &ysd->dom_socket, 1280, 2304);
 521                 if (ysd->dom_client == NULL) {
 522                         clnt_pcreateerror("clntudp_create");
 523                         ysd->dom_vers = -1;
 524                         goto again;
 525                 }
 526                 if (_fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
 527                         perror("fcntl: F_SETFD");
 528                 /*
 529                  * We want a port number associated with this socket
 530                  * so that we can check its authenticity later.
 531                  */
 532                 checklen = sizeof(struct sockaddr_in);
 533                 bzero((char *)&check, checklen);
 534                 bind(ysd->dom_socket, (struct sockaddr *)&check, checklen);
 535                 check.sin_family = AF_INET;
 536                 if (!getsockname(ysd->dom_socket,
 537                     (struct sockaddr *)&check, &checklen)) {
 538                         ysd->dom_local_port = check.sin_port;
 539                 } else {
 540                         clnt_destroy(ysd->dom_client);
 541                         if (new)
 542                                 free(ysd);
 543                         return(YPERR_YPBIND);
 544                 }
 545         }
 546
 547         if (new) {
 548                 ysd->dom_pnext = _ypbindlist;
 549                 _ypbindlist = ysd;
 550         }
 551
 552         if (ypdb != NULL)
 553                 *ypdb = ysd;
 554         return (0);
 555 }
 556
 557 static void
 558 _yp_unbind(ypb)
 559         struct dom_binding *ypb;
 560 {
 561         struct sockaddr_in check;
 562         int checklen = sizeof(struct sockaddr_in);
 563
 564         if (ypb->dom_client != NULL) {
 565                 /* Check the socket -- may have been hosed by the caller. */
 566                 if (getsockname(ypb->dom_socket, (struct sockaddr *)&check,
 567                 &checklen) == -1 || check.sin_family != AF_INET ||
 568                 check.sin_port != ypb->dom_local_port) {
 569                         int save, sock;
 570
 571                         sock = ypb->dom_socket;
 572                         save = dup(ypb->dom_socket);
 573                         clnt_destroy(ypb->dom_client);
 574                         sock = dup2(save, sock);
 575                         _close(save);
 576                 } else
 577                         clnt_destroy(ypb->dom_client);
 578         }
 579
 580         ypb->dom_client = NULL;
 581         ypb->dom_socket = -1;
 582         ypb->dom_vers = -1;
 583 #ifdef YPMATCHCACHE
 584         ypmatch_cache_flush(ypb);
 585 #endif
 586 }
 587
 588 int
 589 yp_bind(dom)
 590         char *dom;
 591 {
 592         return (_yp_dobind(dom, NULL));
 593 }
 594
 595 void
 596 yp_unbind(dom)
 597         char *dom;
 598 {
 599         struct dom_binding *ypb, *ypbp;
 600
 601         ypbp = NULL;
 602         for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
 603                 if (strcmp(dom, ypb->dom_domain) == 0) {
 604                         _yp_unbind(ypb);
 605                         if (ypbp)
 606                                 ypbp->dom_pnext = ypb->dom_pnext;
 607                         else
 608                                 _ypbindlist = ypb->dom_pnext;
 609                         free(ypb);
 610                         return;
 611                 }
 612                 ypbp = ypb;
 613         }
 614         return;
 615 }
 616
 617 int
 618 yp_match(indomain, inmap, inkey, inkeylen, outval, outvallen)
 619         char *indomain;
 620         char *inmap;
 621         const char *inkey;
 622         int inkeylen;
 623         char **outval;
 624         int *outvallen;
 625 {
 626         struct dom_binding *ysd;
 627         struct ypresp_val yprv;
 628         struct timeval tv;
 629         struct ypreq_key yprk;
 630         int r;
 631
 632         *outval = NULL;
 633         *outvallen = 0;
 634
 635         /* Sanity check */
 636
 637         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
 638             inmap == NULL || !strlen(inmap) ||
 639             indomain == NULL || !strlen(indomain))
 640                 return (YPERR_BADARGS);
 641
 642         if (_yp_dobind(indomain, &ysd) != 0)
 643                 return(YPERR_DOMAIN);
 644
 645         yprk.domain = indomain;
 646         yprk.map = inmap;
 647         yprk.key.keydat_val = (char *)inkey;
 648         yprk.key.keydat_len = inkeylen;
 649
 650 #ifdef YPMATCHCACHE
 651         if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) {
 652 /*
 653         if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
 654             inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) {
 655 */
 656                 *outvallen = yprv.val.valdat_len;
 657                 *outval = (char *)malloc(*outvallen+1);
 658                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
 659                 (*outval)[*outvallen] = '\0';
 660                 return (0);
 661         }
 662 #endif
 663
 664 again:
 665         if (_yp_dobind(indomain, &ysd) != 0)
 666                 return (YPERR_DOMAIN);
 667
 668         tv.tv_sec = _yplib_timeout;
 669         tv.tv_usec = 0;
 670
 671         bzero((char *)&yprv, sizeof yprv);
 672
 673         r = clnt_call(ysd->dom_client, YPPROC_MATCH,
 674                 xdr_ypreq_key, &yprk, xdr_ypresp_val, &yprv, tv);
 675         if (r != RPC_SUCCESS) {
 676                 clnt_perror(ysd->dom_client, "yp_match: clnt_call");
 677                 _yp_unbind(ysd);
 678                 goto again;
 679         }
 680
 681         if (!(r = ypprot_err(yprv.stat))) {
 682                 *outvallen = yprv.val.valdat_len;
 683                 *outval = (char *)malloc(*outvallen+1);
 684                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
 685                 (*outval)[*outvallen] = '\0';
 686 #ifdef YPMATCHCACHE
 687                 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val);
 688 #endif
 689         }
 690
 691         xdr_free(xdr_ypresp_val, (char *)&yprv);
 692         return (r);
 693 }
 694
 695 int
 696 yp_get_default_domain(domp)
 697 char **domp;
 698 {
 699         *domp = NULL;
 700         if (_yp_domain[0] == '\0')
 701                 if (getdomainname(_yp_domain, sizeof _yp_domain))
 702                         return (YPERR_NODOM);
 703         *domp = _yp_domain;
 704         return (0);
 705 }
 706
 707 int
 708 yp_first(indomain, inmap, outkey, outkeylen, outval, outvallen)
 709         char *indomain;
 710         char *inmap;
 711         char **outkey;
 712         int *outkeylen;
 713         char **outval;
 714         int *outvallen;
 715 {
 716         struct ypresp_key_val yprkv;
 717         struct ypreq_nokey yprnk;
 718         struct dom_binding *ysd;
 719         struct timeval tv;
 720         int r;
 721
 722         /* Sanity check */
 723
 724         if (indomain == NULL || !strlen(indomain) ||
 725             inmap == NULL || !strlen(inmap))
 726                 return (YPERR_BADARGS);
 727
 728         *outkey = *outval = NULL;
 729         *outkeylen = *outvallen = 0;
 730
 731 again:
 732         if (_yp_dobind(indomain, &ysd) != 0)
 733                 return (YPERR_DOMAIN);
 734
 735         tv.tv_sec = _yplib_timeout;
 736         tv.tv_usec = 0;
 737
 738         yprnk.domain = indomain;
 739         yprnk.map = inmap;
 740         bzero((char *)&yprkv, sizeof yprkv);
 741
 742         r = clnt_call(ysd->dom_client, YPPROC_FIRST,
 743                 xdr_ypreq_nokey, &yprnk, xdr_ypresp_key_val, &yprkv, tv);
 744         if (r != RPC_SUCCESS) {
 745                 clnt_perror(ysd->dom_client, "yp_first: clnt_call");
 746                 _yp_unbind(ysd);
 747                 goto again;
 748         }
 749         if (!(r = ypprot_err(yprkv.stat))) {
 750                 *outkeylen = yprkv.key.keydat_len;
 751                 *outkey = (char *)malloc(*outkeylen+1);
 752                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
 753                 (*outkey)[*outkeylen] = '\0';
 754                 *outvallen = yprkv.val.valdat_len;
 755                 *outval = (char *)malloc(*outvallen+1);
 756                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
 757                 (*outval)[*outvallen] = '\0';
 758         }
 759
 760         xdr_free(xdr_ypresp_key_val, (char *)&yprkv);
 761         return (r);
 762 }
 763
 764 int
 765 yp_next(indomain, inmap, inkey, inkeylen, outkey, outkeylen, outval, outvallen)
 766         char *indomain;
 767         char *inmap;
 768         char *inkey;
 769         int inkeylen;
 770         char **outkey;
 771         int *outkeylen;
 772         char **outval;
 773         int *outvallen;
 774 {
 775         struct ypresp_key_val yprkv;
 776         struct ypreq_key yprk;
 777         struct dom_binding *ysd;
 778         struct timeval tv;
 779         int r;
 780
 781         /* Sanity check */
 782
 783         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
 784             inmap == NULL || !strlen(inmap) ||
 785             indomain == NULL || !strlen(indomain))
 786                 return (YPERR_BADARGS);
 787
 788         *outkey = *outval = NULL;
 789         *outkeylen = *outvallen = 0;
 790
 791 again:
 792         if (_yp_dobind(indomain, &ysd) != 0)
 793                 return (YPERR_DOMAIN);
 794
 795         tv.tv_sec = _yplib_timeout;
 796         tv.tv_usec = 0;
 797
 798         yprk.domain = indomain;
 799         yprk.map = inmap;
 800         yprk.key.keydat_val = inkey;
 801         yprk.key.keydat_len = inkeylen;
 802         bzero((char *)&yprkv, sizeof yprkv);
 803
 804         r = clnt_call(ysd->dom_client, YPPROC_NEXT,
 805                 xdr_ypreq_key, &yprk, xdr_ypresp_key_val, &yprkv, tv);
 806         if (r != RPC_SUCCESS) {
 807                 clnt_perror(ysd->dom_client, "yp_next: clnt_call");
 808                 _yp_unbind(ysd);
 809                 goto again;
 810         }
 811         if (!(r = ypprot_err(yprkv.stat))) {
 812                 *outkeylen = yprkv.key.keydat_len;
 813                 *outkey = (char *)malloc(*outkeylen+1);
 814                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
 815                 (*outkey)[*outkeylen] = '\0';
 816                 *outvallen = yprkv.val.valdat_len;
 817                 *outval = (char *)malloc(*outvallen+1);
 818                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
 819                 (*outval)[*outvallen] = '\0';
 820         }
 821
 822         xdr_free(xdr_ypresp_key_val, (char *)&yprkv);
 823         return (r);
 824 }
 825
 826 int
 827 yp_all(indomain, inmap, incallback)
 828         char *indomain;
 829         char *inmap;
 830         struct ypall_callback *incallback;
 831 {
 832         struct ypreq_nokey yprnk;
 833         struct dom_binding *ysd;
 834         struct timeval tv;
 835         struct sockaddr_in clnt_sin;
 836         CLIENT *clnt;
 837         u_long status, savstat;
 838         int clnt_sock;
 839
 840         /* Sanity check */
 841
 842         if (indomain == NULL || !strlen(indomain) ||
 843             inmap == NULL || !strlen(inmap))
 844                 return (YPERR_BADARGS);
 845
 846 again:
 847
 848         if (_yp_dobind(indomain, &ysd) != 0)
 849                 return (YPERR_DOMAIN);
 850
 851         tv.tv_sec = _yplib_timeout;
 852         tv.tv_usec = 0;
 853
 854         /* YPPROC_ALL manufactures its own channel to ypserv using TCP */
 855
 856         clnt_sock = RPC_ANYSOCK;
 857         clnt_sin = ysd->dom_server_addr;
 858         clnt_sin.sin_port = 0;
 859         clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
 860         if (clnt == NULL) {
 861                 printf("clnttcp_create failed\n");
 862                 return (YPERR_PMAP);
 863         }
 864
 865         yprnk.domain = indomain;
 866         yprnk.map = inmap;
 867         ypresp_allfn = incallback->foreach;
 868         ypresp_data = (void *)incallback->data;
 869
 870         if (clnt_call(clnt, YPPROC_ALL,
 871                 xdr_ypreq_nokey, &yprnk,
 872                 xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) {
 873                         clnt_perror(ysd->dom_client, "yp_all: clnt_call");
 874                         clnt_destroy(clnt);
 875                         _yp_unbind(ysd);
 876                         goto again;
 877         }
 878
 879         clnt_destroy(clnt);
 880         savstat = status;
 881         xdr_free(xdr_ypresp_all_seq, (char *)&status);  /* not really needed... */
 882         if (savstat != YP_NOMORE)
 883                 return (ypprot_err(savstat));
 884         return (0);
 885 }
 886
 887 int
 888 yp_order(indomain, inmap, outorder)
 889         char *indomain;
 890         char *inmap;
 891         int *outorder;
 892 {
 893         struct dom_binding *ysd;
 894         struct ypresp_order ypro;
 895         struct ypreq_nokey yprnk;
 896         struct timeval tv;
 897         int r;
 898
 899         /* Sanity check */
 900
 901         if (indomain == NULL || !strlen(indomain) ||
 902             inmap == NULL || !strlen(inmap))
 903                 return (YPERR_BADARGS);
 904
 905 again:
 906         if (_yp_dobind(indomain, &ysd) != 0)
 907                 return (YPERR_DOMAIN);
 908
 909         tv.tv_sec = _yplib_timeout;
 910         tv.tv_usec = 0;
 911
 912         yprnk.domain = indomain;
 913         yprnk.map = inmap;
 914
 915         bzero((char *)(char *)&ypro, sizeof ypro);
 916
 917         r = clnt_call(ysd->dom_client, YPPROC_ORDER,
 918                 xdr_ypreq_nokey, &yprnk, xdr_ypresp_order, &ypro, tv);
 919
 920         /*
 921          * NIS+ in YP compat mode doesn't support the YPPROC_ORDER
 922          * procedure.
 923          */
 924         if (r == RPC_PROCUNAVAIL) {
 925                 return(YPERR_YPERR);
 926         }
 927
 928         if (r != RPC_SUCCESS) {
 929                 clnt_perror(ysd->dom_client, "yp_order: clnt_call");
 930                 _yp_unbind(ysd);
 931                 goto again;
 932         }
 933
 934         if (!(r = ypprot_err(ypro.stat))) {
 935                 *outorder = ypro.ordernum;
 936         }
 937
 938         xdr_free(xdr_ypresp_order, (char *)&ypro);
 939         return (r);
 940 }
 941
 942 int
 943 yp_master(indomain, inmap, outname)
 944         char *indomain;
 945         char *inmap;
 946         char **outname;
 947 {
 948         struct dom_binding *ysd;
 949         struct ypresp_master yprm;
 950         struct ypreq_nokey yprnk;
 951         struct timeval tv;
 952         int r;
 953
 954         /* Sanity check */
 955
 956         if (indomain == NULL || !strlen(indomain) ||
 957             inmap == NULL || !strlen(inmap))
 958                 return (YPERR_BADARGS);
 959 again:
 960         if (_yp_dobind(indomain, &ysd) != 0)
 961                 return (YPERR_DOMAIN);
 962
 963         tv.tv_sec = _yplib_timeout;
 964         tv.tv_usec = 0;
 965
 966         yprnk.domain = indomain;
 967         yprnk.map = inmap;
 968
 969         bzero((char *)&yprm, sizeof yprm);
 970
 971         r = clnt_call(ysd->dom_client, YPPROC_MASTER,
 972                 xdr_ypreq_nokey, &yprnk, xdr_ypresp_master, &yprm, tv);
 973         if (r != RPC_SUCCESS) {
 974                 clnt_perror(ysd->dom_client, "yp_master: clnt_call");
 975                 _yp_unbind(ysd);
 976                 goto again;
 977         }
 978
 979         if (!(r = ypprot_err(yprm.stat))) {
 980                 *outname = (char *)strdup(yprm.peer);
 981         }
 982
 983         xdr_free(xdr_ypresp_master, (char *)&yprm);
 984         return (r);
 985 }
 986 int
 987 yp_maplist(indomain, outmaplist)
 988         char *indomain;
 989         struct ypmaplist **outmaplist;
 990 {
 991         struct dom_binding *ysd;
 992         struct ypresp_maplist ypml;
 993         struct timeval tv;
 994         int r;
 995
 996         /* Sanity check */
 997
 998         if (indomain == NULL || !strlen(indomain))
 999                 return (YPERR_BADARGS);
1000
1001 again:
1002         if (_yp_dobind(indomain, &ysd) != 0)
1003                 return (YPERR_DOMAIN);
1004
1005         tv.tv_sec = _yplib_timeout;
1006         tv.tv_usec = 0;
1007
1008         bzero((char *)&ypml, sizeof ypml);
1009
1010         r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
1011                 xdr_domainname,(char *)&indomain,xdr_ypresp_maplist,&ypml,tv);
1012         if (r != RPC_SUCCESS) {
1013                 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
1014                 _yp_unbind(ysd);
1015                 goto again;
1016         }
1017         if (!(r = ypprot_err(ypml.stat))) {
1018                 *outmaplist = ypml.maps;
1019         }
1020
1021         /* NO: xdr_free(xdr_ypresp_maplist, &ypml);*/
1022         return (r);
1023 }
1024
1025 char *
1026 yperr_string(incode)
1027         int incode;
1028 {
1029         static char err[80];
1030
1031         switch (incode) {
1032         case 0:
1033                 return ("Success");
1034         case YPERR_BADARGS:
1035                 return ("Request arguments bad");
1036         case YPERR_RPC:
1037                 return ("RPC failure");
1038         case YPERR_DOMAIN:
1039                 return ("Can't bind to server which serves this domain");
1040         case YPERR_MAP:
1041                 return ("No such map in server's domain");
1042         case YPERR_KEY:
1043                 return ("No such key in map");
1044         case YPERR_YPERR:
1045                 return ("YP server error");
1046         case YPERR_RESRC:
1047                 return ("Local resource allocation failure");
1048         case YPERR_NOMORE:
1049                 return ("No more records in map database");
1050         case YPERR_PMAP:
1051                 return ("Can't communicate with portmapper");
1052         case YPERR_YPBIND:
1053                 return ("Can't communicate with ypbind");
1054         case YPERR_YPSERV:
1055                 return ("Can't communicate with ypserv");
1056         case YPERR_NODOM:
1057                 return ("Local domain name not set");
1058         case YPERR_BADDB:
1059                 return ("Server data base is bad");
1060         case YPERR_VERS:
1061                 return ("YP server version mismatch - server can't supply service.");
1062         case YPERR_ACCESS:
1063                 return ("Access violation");
1064         case YPERR_BUSY:
1065                 return ("Database is busy");
1066         }
1067         sprintf(err, "YP unknown error %d\n", incode);
1068         return (err);
1069 }
1070
1071 int
1072 ypprot_err(incode)
1073         unsigned int incode;
1074 {
1075         switch (incode) {
1076         case YP_TRUE:
1077                 return (0);
1078         case YP_FALSE:
1079                 return (YPERR_YPBIND);
1080         case YP_NOMORE:
1081                 return (YPERR_NOMORE);
1082         case YP_NOMAP:
1083                 return (YPERR_MAP);
1084         case YP_NODOM:
1085                 return (YPERR_DOMAIN);
1086         case YP_NOKEY:
1087                 return (YPERR_KEY);
1088         case YP_BADOP:
1089                 return (YPERR_YPERR);
1090         case YP_BADDB:
1091                 return (YPERR_BADDB);
1092         case YP_YPERR:
1093                 return (YPERR_YPERR);
1094         case YP_BADARGS:
1095                 return (YPERR_BADARGS);
1096         case YP_VERS:
1097                 return (YPERR_VERS);
1098         }
1099         return (YPERR_YPERR);
1100 }
1101
1102 int
1103 _yp_check(dom)
1104         char **dom;
1105 {
1106         char *unused;
1107
1108         if (_yp_domain[0]=='\0')
1109                 if (yp_get_default_domain(&unused))
1110                         return (0);
1111
1112         if (dom)
1113                 *dom = _yp_domain;
1114
1115         if (yp_bind(_yp_domain) == 0) {
1116                 yp_unbind(_yp_domain);
1117                 return (1);
1118         }
1119         return (0);
1120 }