lib/libc/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
  31 #ifndef LINT
  32 static char *rcsid = "$FreeBSD: src/lib/libc/yp/yplib.c,v 1.34.2.2 2002/02/15 00:46:53 des Exp $";
  33 #endif
  34
  35 #include <sys/param.h>
  36 #include <sys/types.h>
  37 #include <sys/socket.h>
  38 #include <sys/file.h>
  39 #include <sys/uio.h>
  40 #include <errno.h>
  41 #include <stdio.h>
  42 #include <string.h>
  43 #include <stdlib.h>
  44 #include <unistd.h>
  45 #include <rpc/rpc.h>
  46 #include <rpc/xdr.h>
  47 #include <rpcsvc/yp.h>
  48
  49 /*
  50  * We have to define these here due to clashes between yp_prot.h and
  51  * yp.h.
  52  */
  53
  54 #define YPMATCHCACHE
  55
  56 #ifdef YPMATCHCACHE
  57 struct ypmatch_ent {
  58         char                    *ypc_map;
  59         keydat                  ypc_key;
  60         valdat                  ypc_val;
  61         time_t                  ypc_expire_t;
  62         struct ypmatch_ent      *ypc_next;
  63 };
  64 #define YPLIB_MAXCACHE  5       /* At most 5 entries */
  65 #define YPLIB_EXPIRE    5       /* Expire after 5 seconds */
  66 #endif
  67
  68 struct dom_binding {
  69         struct dom_binding *dom_pnext;
  70         char dom_domain[YPMAXDOMAIN + 1];
  71         struct sockaddr_in dom_server_addr;
  72         u_short dom_server_port;
  73         int dom_socket;
  74         CLIENT *dom_client;
  75         u_short dom_local_port; /* now I finally know what this is for. */
  76         long dom_vers;
  77 #ifdef YPMATCHCACHE
  78         struct ypmatch_ent *cache;
  79         int ypmatch_cachecnt;
  80 #endif
  81 };
  82
  83 #include <rpcsvc/ypclnt.h>
  84
  85 #ifndef BINDINGDIR
  86 #define BINDINGDIR "/var/yp/binding"
  87 #endif
  88 #define MAX_RETRIES 20
  89
  90 extern bool_t xdr_domainname(), xdr_ypbind_resp();
  91 extern bool_t xdr_ypreq_key(), xdr_ypresp_val();
  92 extern bool_t xdr_ypreq_nokey(), xdr_ypresp_key_val();
  93 extern bool_t xdr_ypresp_all(), xdr_ypresp_all_seq();
  94 extern bool_t xdr_ypresp_master();
  95
  96 int (*ypresp_allfn)();
  97 void *ypresp_data;
  98
  99 static void _yp_unbind(struct dom_binding *);
 100 struct dom_binding *_ypbindlist;
 101 static char _yp_domain[MAXHOSTNAMELEN];
 102 int _yplib_timeout = 10;
 103
 104 #ifdef YPMATCHCACHE
 105 static void ypmatch_cache_delete(ypdb, prev, cur)
 106         struct dom_binding      *ypdb;
 107         struct ypmatch_ent      *prev;
 108         struct ypmatch_ent      *cur;
 109 {
 110         if (prev == NULL)
 111                 ypdb->cache = cur->ypc_next;
 112         else
 113                 prev->ypc_next = cur->ypc_next;
 114
 115         free(cur->ypc_map);
 116         free(cur->ypc_key.keydat_val);
 117         free(cur->ypc_val.valdat_val);
 118         free(cur);
 119
 120         ypdb->ypmatch_cachecnt--;
 121
 122         return;
 123 }
 124
 125 static void ypmatch_cache_flush(ypdb)
 126         struct dom_binding      *ypdb;
 127 {
 128         struct ypmatch_ent      *n, *c = ypdb->cache;
 129
 130         while (c != NULL) {
 131                 n = c->ypc_next;
 132                 ypmatch_cache_delete(ypdb, NULL, c);
 133                 c = n;
 134         }
 135
 136         return;
 137 }
 138
 139 static void ypmatch_cache_expire(ypdb)
 140         struct dom_binding      *ypdb;
 141 {
 142         struct ypmatch_ent      *c = ypdb->cache;
 143         struct ypmatch_ent      *n, *p = NULL;
 144         time_t                  t;
 145
 146         time(&t);
 147
 148         while (c != NULL) {
 149                 if (t >= c->ypc_expire_t) {
 150                         n = c->ypc_next;
 151                         ypmatch_cache_delete(ypdb, p, c);
 152                         c = n;
 153                 } else {
 154                         p = c;
 155                         c = c->ypc_next;
 156                 }
 157         }
 158
 159         return;
 160 }
 161
 162 static void ypmatch_cache_insert(ypdb, map, key, val)
 163         struct dom_binding      *ypdb;
 164         char                    *map;
 165         keydat                  *key;
 166         valdat                  *val;
 167 {
 168         struct ypmatch_ent      *new;
 169
 170         /* Do an expire run to maybe open up a slot. */
 171         if (ypdb->ypmatch_cachecnt)
 172                 ypmatch_cache_expire(ypdb);
 173
 174         /*
 175          * If there are no slots free, then force an expire of
 176          * the least recently used entry.
 177          */
 178         if (ypdb->ypmatch_cachecnt >= YPLIB_MAXCACHE) {
 179                 struct ypmatch_ent      *o = NULL, *c = ypdb->cache;
 180                 time_t                  oldest = 0;
 181
 182                 oldest = ~oldest;
 183
 184                 while (c != NULL) {
 185                         if (c->ypc_expire_t < oldest) {
 186                                 oldest = c->ypc_expire_t;
 187                                 o = c;
 188                         }
 189                         c = c->ypc_next;
 190                 }
 191
 192                 if (o == NULL)
 193                         return;
 194                 o->ypc_expire_t = 0;
 195                 ypmatch_cache_expire(ypdb);
 196         }
 197
 198         new = malloc(sizeof(struct ypmatch_ent));
 199         if (new == NULL)
 200                 return;
 201
 202         new->ypc_map = strdup(map);
 203         if (new->ypc_map == NULL) {
 204                 free(new);
 205                 return;
 206         }
 207         new->ypc_key.keydat_val = malloc(key->keydat_len);
 208         if (new->ypc_key.keydat_val == NULL) {
 209                 free(new->ypc_map);
 210                 free(new);
 211                 return;
 212         }
 213         new->ypc_val.valdat_val = malloc(val->valdat_len);
 214         if (new->ypc_val.valdat_val == NULL) {
 215                 free(new->ypc_val.valdat_val);
 216                 free(new->ypc_map);
 217                 free(new);
 218                 return;
 219         }
 220
 221         new->ypc_expire_t = time(NULL) + YPLIB_EXPIRE;
 222         new->ypc_key.keydat_len = key->keydat_len;
 223         new->ypc_val.valdat_len = val->valdat_len;
 224         bcopy(key->keydat_val, new->ypc_key.keydat_val, key->keydat_len);
 225         bcopy(val->valdat_val, new->ypc_val.valdat_val, val->valdat_len);
 226
 227         new->ypc_next = ypdb->cache;
 228         ypdb->cache = new;
 229
 230         ypdb->ypmatch_cachecnt++;
 231
 232         return;
 233 }
 234
 235 static bool_t ypmatch_cache_lookup(ypdb, map, key, val)
 236         struct dom_binding      *ypdb;
 237         char                    *map;
 238         keydat                  *key;
 239         valdat                  *val;
 240 {
 241         struct ypmatch_ent      *c = ypdb->cache;
 242
 243         ypmatch_cache_expire(ypdb);
 244
 245         for (c = ypdb->cache; c != NULL; c = c->ypc_next) {
 246                 if (strcmp(map, c->ypc_map))
 247                         continue;
 248                 if (key->keydat_len != c->ypc_key.keydat_len)
 249                         continue;
 250                 if (bcmp(key->keydat_val, c->ypc_key.keydat_val,
 251                                 key->keydat_len))
 252                         continue;
 253         }
 254
 255         if (c == NULL)
 256                 return(FALSE);
 257
 258         val->valdat_len = c->ypc_val.valdat_len;
 259         val->valdat_val = c->ypc_val.valdat_val;
 260
 261         return(TRUE);
 262 }
 263 #endif
 264
 265 char *
 266 ypbinderr_string(incode)
 267         int incode;
 268 {
 269         static char err[80];
 270         switch (incode) {
 271         case 0:
 272                 return ("Success");
 273         case YPBIND_ERR_ERR:
 274                 return ("Internal ypbind error");
 275         case YPBIND_ERR_NOSERV:
 276                 return ("Domain not bound");
 277         case YPBIND_ERR_RESC:
 278                 return ("System resource allocation failure");
 279         }
 280         sprintf(err, "Unknown ypbind error: #%d\n", incode);
 281         return (err);
 282 }
 283
 284 int
 285 _yp_dobind(dom, ypdb)
 286         char *dom;
 287         struct dom_binding **ypdb;
 288 {
 289         static pid_t pid = -1;
 290         char path[MAXPATHLEN];
 291         struct dom_binding *ysd, *ysd2;
 292         struct ypbind_resp ypbr;
 293         struct timeval tv;
 294         struct sockaddr_in clnt_sin;
 295         int clnt_sock, fd;
 296         pid_t gpid;
 297         CLIENT *client;
 298         int new = 0, r;
 299         int retries = 0;
 300         struct sockaddr_in check;
 301         int checklen = sizeof(struct sockaddr_in);
 302
 303         /* Not allowed; bad doggie. Bad. */
 304         if (strchr(dom, '/') != NULL)
 305                 return(YPERR_BADARGS);
 306
 307         gpid = getpid();
 308         if (!(pid == -1 || pid == gpid)) {
 309                 ysd = _ypbindlist;
 310                 while (ysd) {
 311                         if (ysd->dom_client != NULL)
 312                                 _yp_unbind(ysd);
 313                         ysd2 = ysd->dom_pnext;
 314                         free(ysd);
 315                         ysd = ysd2;
 316                 }
 317                 _ypbindlist = NULL;
 318         }
 319         pid = gpid;
 320
 321         if (ypdb != NULL)
 322                 *ypdb = NULL;
 323
 324         if (dom == NULL || strlen(dom) == 0)
 325                 return (YPERR_BADARGS);
 326
 327         for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
 328                 if (strcmp(dom, ysd->dom_domain) == 0)
 329                         break;
 330
 331
 332         if (ysd == NULL) {
 333                 ysd = (struct dom_binding *)malloc(sizeof *ysd);
 334                 bzero((char *)ysd, sizeof *ysd);
 335                 ysd->dom_socket = -1;
 336                 ysd->dom_vers = 0;
 337                 new = 1;
 338         } else {
 339         /* Check the socket -- may have been hosed by the caller. */
 340                 if (getsockname(ysd->dom_socket, (struct sockaddr *)&check,
 341                     &checklen) == -1 || check.sin_family != AF_INET ||
 342                     check.sin_port != ysd->dom_local_port) {
 343                 /* Socket became bogus somehow... need to rebind. */
 344                         int save, sock;
 345
 346                         sock = ysd->dom_socket;
 347                         save = dup(ysd->dom_socket);
 348                         if (ysd->dom_client != NULL)
 349                                 clnt_destroy(ysd->dom_client);
 350                         ysd->dom_vers = 0;
 351                         ysd->dom_client = NULL;
 352                         sock = dup2(save, sock);
 353                         _close(save);
 354                 }
 355         }
 356
 357 again:
 358         retries++;
 359         if (retries > MAX_RETRIES) {
 360                 if (new)
 361                         free(ysd);
 362                 return(YPERR_YPBIND);
 363         }
 364 #ifdef BINDINGDIR
 365         if (ysd->dom_vers == 0) {
 366                 /*
 367                  * We're trying to make a new binding: zorch the
 368                  * existing handle now (if any).
 369                  */
 370                 if (ysd->dom_client != NULL) {
 371                         clnt_destroy(ysd->dom_client);
 372                         ysd->dom_client = NULL;
 373                         ysd->dom_socket = -1;
 374                 }
 375                 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2);
 376                 if ((fd = _open(path, O_RDONLY)) == -1) {
 377                         /* no binding file, YP is dead. */
 378                         /* Try to bring it back to life. */
 379                         _close(fd);
 380                         goto skipit;
 381                 }
 382                 if (flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
 383                         struct iovec iov[2];
 384                         struct ypbind_resp ybr;
 385                         u_short ypb_port;
 386
 387                         iov[0].iov_base = (caddr_t)&ypb_port;
 388                         iov[0].iov_len = sizeof ypb_port;
 389                         iov[1].iov_base = (caddr_t)&ybr;
 390                         iov[1].iov_len = sizeof ybr;
 391
 392                         r = readv(fd, iov, 2);
 393                         if (r != iov[0].iov_len + iov[1].iov_len) {
 394                                 _close(fd);
 395                                 ysd->dom_vers = -1;
 396                                 goto again;
 397                         }
 398
 399                         bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
 400                         ysd->dom_server_addr.sin_family = AF_INET;
 401                         ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
 402                         ysd->dom_server_addr.sin_addr.s_addr =
 403                             *(u_long *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
 404                         ysd->dom_server_addr.sin_port =
 405                             *(u_short *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 406
 407                         ysd->dom_server_port = ysd->dom_server_addr.sin_port;
 408                         _close(fd);
 409                         goto gotit;
 410                 } else {
 411                         /* no lock on binding file, YP is dead. */
 412                         /* Try to bring it back to life. */
 413                         _close(fd);
 414                         goto skipit;
 415                 }
 416         }
 417 skipit:
 418 #endif
 419         if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
 420                 /*
 421                  * We're trying to make a new binding: zorch the
 422                  * existing handle now (if any).
 423                  */
 424                 if (ysd->dom_client != NULL) {
 425                         clnt_destroy(ysd->dom_client);
 426                         ysd->dom_client = NULL;
 427                         ysd->dom_socket = -1;
 428                 }
 429                 bzero((char *)&clnt_sin, sizeof clnt_sin);
 430                 clnt_sin.sin_family = AF_INET;
 431                 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 432
 433                 clnt_sock = RPC_ANYSOCK;
 434                 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
 435                         0, 0);
 436                 if (client == NULL) {
 437                         /*
 438                          * These conditions indicate ypbind just isn't
 439                          * alive -- we probably don't want to shoot our
 440                          * mouth off in this case; instead generate error
 441                          * messages only for really exotic problems.
 442                          */
 443                         if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED &&
 444                            (rpc_createerr.cf_stat != RPC_SYSTEMERROR &&
 445                            rpc_createerr.cf_error.re_errno == ECONNREFUSED))
 446                                 clnt_pcreateerror("clnttcp_create");
 447                         if (new)
 448                                 free(ysd);
 449                         return (YPERR_YPBIND);
 450                 }
 451
 452                 /*
 453                  * Check the port number -- should be < IPPORT_RESERVED.
 454                  * If not, it's possible someone has registered a bogus
 455                  * ypbind with the portmapper and is trying to trick us.
 456                  */
 457                 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) {
 458                         if (client != NULL)
 459                                 clnt_destroy(client);
 460                         if (new)
 461                                 free(ysd);
 462                         return(YPERR_YPBIND);
 463                 }
 464                 tv.tv_sec = _yplib_timeout/2;
 465                 tv.tv_usec = 0;
 466                 r = clnt_call(client, YPBINDPROC_DOMAIN,
 467                         xdr_domainname, (char *)&dom, xdr_ypbind_resp, &ypbr, tv);
 468                 if (r != RPC_SUCCESS) {
 469                         clnt_destroy(client);
 470                         ysd->dom_vers = -1;
 471                         if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) {
 472                                 if (new)
 473                                         free(ysd);
 474                                 return(YPERR_YPBIND);
 475                         }
 476                         fprintf(stderr,
 477                         "YP: server for domain %s not responding, retrying\n", dom);
 478                         goto again;
 479                 } else {
 480                         if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
 481                                 struct timespec time_to_sleep, time_remaining;
 482
 483                                 clnt_destroy(client);
 484                                 ysd->dom_vers = -1;
 485
 486                                 time_to_sleep.tv_sec = _yplib_timeout/2;
 487                                 time_to_sleep.tv_nsec = 0;
 488                                 _nanosleep(&time_to_sleep,
 489                                     &time_remaining);
 490                                 goto again;
 491                         }
 492                 }
 493                 clnt_destroy(client);
 494
 495                 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
 496                 ysd->dom_server_addr.sin_family = AF_INET;
 497                 ysd->dom_server_addr.sin_port =
 498                         *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 499                 ysd->dom_server_addr.sin_addr.s_addr =
 500                         *(u_long *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
 501
 502                 /*
 503                  * We could do a reserved port check here too, but this
 504                  * could pose compatibility problems. The local ypbind is
 505                  * supposed to decide whether or not to trust yp servers
 506                  * on insecure ports. For now, we trust its judgement.
 507                  */
 508                 ysd->dom_server_port =
 509                         *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 510 gotit:
 511                 ysd->dom_vers = YPVERS;
 512                 strlcpy(ysd->dom_domain, dom, sizeof(ysd->dom_domain));
 513         }
 514
 515         /* Don't rebuild the connection to the server unless we have to. */
 516         if (ysd->dom_client == NULL) {
 517                 tv.tv_sec = _yplib_timeout/2;
 518                 tv.tv_usec = 0;
 519                 ysd->dom_socket = RPC_ANYSOCK;
 520                 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr,
 521                         YPPROG, YPVERS, tv, &ysd->dom_socket, 1280, 2304);
 522                 if (ysd->dom_client == NULL) {
 523                         clnt_pcreateerror("clntudp_create");
 524                         ysd->dom_vers = -1;
 525                         goto again;
 526                 }
 527                 if (_fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
 528                         perror("fcntl: F_SETFD");
 529                 /*
 530                  * We want a port number associated with this socket
 531                  * so that we can check its authenticity later.
 532                  */
 533                 checklen = sizeof(struct sockaddr_in);
 534                 bzero((char *)&check, checklen);
 535                 bind(ysd->dom_socket, (struct sockaddr *)&check, checklen);
 536                 check.sin_family = AF_INET;
 537                 if (!getsockname(ysd->dom_socket,
 538                     (struct sockaddr *)&check, &checklen)) {
 539                         ysd->dom_local_port = check.sin_port;
 540                 } else {
 541                         clnt_destroy(ysd->dom_client);
 542                         if (new)
 543                                 free(ysd);
 544                         return(YPERR_YPBIND);
 545                 }
 546         }
 547
 548         if (new) {
 549                 ysd->dom_pnext = _ypbindlist;
 550                 _ypbindlist = ysd;
 551         }
 552
 553         if (ypdb != NULL)
 554                 *ypdb = ysd;
 555         return (0);
 556 }
 557
 558 static void
 559 _yp_unbind(ypb)
 560         struct dom_binding *ypb;
 561 {
 562         struct sockaddr_in check;
 563         int checklen = sizeof(struct sockaddr_in);
 564
 565         if (ypb->dom_client != NULL) {
 566                 /* Check the socket -- may have been hosed by the caller. */
 567                 if (getsockname(ypb->dom_socket, (struct sockaddr *)&check,
 568                 &checklen) == -1 || check.sin_family != AF_INET ||
 569                 check.sin_port != ypb->dom_local_port) {
 570                         int save, sock;
 571
 572                         sock = ypb->dom_socket;
 573                         save = dup(ypb->dom_socket);
 574                         clnt_destroy(ypb->dom_client);
 575                         sock = dup2(save, sock);
 576                         _close(save);
 577                 } else
 578                         clnt_destroy(ypb->dom_client);
 579         }
 580
 581         ypb->dom_client = NULL;
 582         ypb->dom_socket = -1;
 583         ypb->dom_vers = -1;
 584 #ifdef YPMATCHCACHE
 585         ypmatch_cache_flush(ypb);
 586 #endif
 587 }
 588
 589 int
 590 yp_bind(dom)
 591         char *dom;
 592 {
 593         return (_yp_dobind(dom, NULL));
 594 }
 595
 596 void
 597 yp_unbind(dom)
 598         char *dom;
 599 {
 600         struct dom_binding *ypb, *ypbp;
 601
 602         ypbp = NULL;
 603         for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
 604                 if (strcmp(dom, ypb->dom_domain) == 0) {
 605                         _yp_unbind(ypb);
 606                         if (ypbp)
 607                                 ypbp->dom_pnext = ypb->dom_pnext;
 608                         else
 609                                 _ypbindlist = ypb->dom_pnext;
 610                         free(ypb);
 611                         return;
 612                 }
 613                 ypbp = ypb;
 614         }
 615         return;
 616 }
 617
 618 int
 619 yp_match(indomain, inmap, inkey, inkeylen, outval, outvallen)
 620         char *indomain;
 621         char *inmap;
 622         const char *inkey;
 623         int inkeylen;
 624         char **outval;
 625         int *outvallen;
 626 {
 627         struct dom_binding *ysd;
 628         struct ypresp_val yprv;
 629         struct timeval tv;
 630         struct ypreq_key yprk;
 631         int r;
 632
 633         *outval = NULL;
 634         *outvallen = 0;
 635
 636         /* Sanity check */
 637
 638         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
 639             inmap == NULL || !strlen(inmap) ||
 640             indomain == NULL || !strlen(indomain))
 641                 return (YPERR_BADARGS);
 642
 643         if (_yp_dobind(indomain, &ysd) != 0)
 644                 return(YPERR_DOMAIN);
 645
 646         yprk.domain = indomain;
 647         yprk.map = inmap;
 648         yprk.key.keydat_val = (char *)inkey;
 649         yprk.key.keydat_len = inkeylen;
 650
 651 #ifdef YPMATCHCACHE
 652         if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) {
 653 /*
 654         if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
 655             inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) {
 656 */
 657                 *outvallen = yprv.val.valdat_len;
 658                 *outval = (char *)malloc(*outvallen+1);
 659                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
 660                 (*outval)[*outvallen] = '\0';
 661                 return (0);
 662         }
 663 #endif
 664
 665 again:
 666         if (_yp_dobind(indomain, &ysd) != 0)
 667                 return (YPERR_DOMAIN);
 668
 669         tv.tv_sec = _yplib_timeout;
 670         tv.tv_usec = 0;
 671
 672         bzero((char *)&yprv, sizeof yprv);
 673
 674         r = clnt_call(ysd->dom_client, YPPROC_MATCH,
 675                 xdr_ypreq_key, &yprk, xdr_ypresp_val, &yprv, tv);
 676         if (r != RPC_SUCCESS) {
 677                 clnt_perror(ysd->dom_client, "yp_match: clnt_call");
 678                 _yp_unbind(ysd);
 679                 goto again;
 680         }
 681
 682         if (!(r = ypprot_err(yprv.stat))) {
 683                 *outvallen = yprv.val.valdat_len;
 684                 *outval = (char *)malloc(*outvallen+1);
 685                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
 686                 (*outval)[*outvallen] = '\0';
 687 #ifdef YPMATCHCACHE
 688                 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val);
 689 #endif
 690         }
 691
 692         xdr_free(xdr_ypresp_val, (char *)&yprv);
 693         return (r);
 694 }
 695
 696 int
 697 yp_get_default_domain(domp)
 698 char **domp;
 699 {
 700         *domp = NULL;
 701         if (_yp_domain[0] == '\0')
 702                 if (getdomainname(_yp_domain, sizeof _yp_domain))
 703                         return (YPERR_NODOM);
 704         *domp = _yp_domain;
 705         return (0);
 706 }
 707
 708 int
 709 yp_first(indomain, inmap, outkey, outkeylen, outval, outvallen)
 710         char *indomain;
 711         char *inmap;
 712         char **outkey;
 713         int *outkeylen;
 714         char **outval;
 715         int *outvallen;
 716 {
 717         struct ypresp_key_val yprkv;
 718         struct ypreq_nokey yprnk;
 719         struct dom_binding *ysd;
 720         struct timeval tv;
 721         int r;
 722
 723         /* Sanity check */
 724
 725         if (indomain == NULL || !strlen(indomain) ||
 726             inmap == NULL || !strlen(inmap))
 727                 return (YPERR_BADARGS);
 728
 729         *outkey = *outval = NULL;
 730         *outkeylen = *outvallen = 0;
 731
 732 again:
 733         if (_yp_dobind(indomain, &ysd) != 0)
 734                 return (YPERR_DOMAIN);
 735
 736         tv.tv_sec = _yplib_timeout;
 737         tv.tv_usec = 0;
 738
 739         yprnk.domain = indomain;
 740         yprnk.map = inmap;
 741         bzero((char *)&yprkv, sizeof yprkv);
 742
 743         r = clnt_call(ysd->dom_client, YPPROC_FIRST,
 744                 xdr_ypreq_nokey, &yprnk, xdr_ypresp_key_val, &yprkv, tv);
 745         if (r != RPC_SUCCESS) {
 746                 clnt_perror(ysd->dom_client, "yp_first: clnt_call");
 747                 _yp_unbind(ysd);
 748                 goto again;
 749         }
 750         if (!(r = ypprot_err(yprkv.stat))) {
 751                 *outkeylen = yprkv.key.keydat_len;
 752                 *outkey = (char *)malloc(*outkeylen+1);
 753                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
 754                 (*outkey)[*outkeylen] = '\0';
 755                 *outvallen = yprkv.val.valdat_len;
 756                 *outval = (char *)malloc(*outvallen+1);
 757                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
 758                 (*outval)[*outvallen] = '\0';
 759         }
 760
 761         xdr_free(xdr_ypresp_key_val, (char *)&yprkv);
 762         return (r);
 763 }
 764
 765 int
 766 yp_next(indomain, inmap, inkey, inkeylen, outkey, outkeylen, outval, outvallen)
 767         char *indomain;
 768         char *inmap;
 769         char *inkey;
 770         int inkeylen;
 771         char **outkey;
 772         int *outkeylen;
 773         char **outval;
 774         int *outvallen;
 775 {
 776         struct ypresp_key_val yprkv;
 777         struct ypreq_key yprk;
 778         struct dom_binding *ysd;
 779         struct timeval tv;
 780         int r;
 781
 782         /* Sanity check */
 783
 784         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
 785             inmap == NULL || !strlen(inmap) ||
 786             indomain == NULL || !strlen(indomain))
 787                 return (YPERR_BADARGS);
 788
 789         *outkey = *outval = NULL;
 790         *outkeylen = *outvallen = 0;
 791
 792 again:
 793         if (_yp_dobind(indomain, &ysd) != 0)
 794                 return (YPERR_DOMAIN);
 795
 796         tv.tv_sec = _yplib_timeout;
 797         tv.tv_usec = 0;
 798
 799         yprk.domain = indomain;
 800         yprk.map = inmap;
 801         yprk.key.keydat_val = inkey;
 802         yprk.key.keydat_len = inkeylen;
 803         bzero((char *)&yprkv, sizeof yprkv);
 804
 805         r = clnt_call(ysd->dom_client, YPPROC_NEXT,
 806                 xdr_ypreq_key, &yprk, xdr_ypresp_key_val, &yprkv, tv);
 807         if (r != RPC_SUCCESS) {
 808                 clnt_perror(ysd->dom_client, "yp_next: clnt_call");
 809                 _yp_unbind(ysd);
 810                 goto again;
 811         }
 812         if (!(r = ypprot_err(yprkv.stat))) {
 813                 *outkeylen = yprkv.key.keydat_len;
 814                 *outkey = (char *)malloc(*outkeylen+1);
 815                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
 816                 (*outkey)[*outkeylen] = '\0';
 817                 *outvallen = yprkv.val.valdat_len;
 818                 *outval = (char *)malloc(*outvallen+1);
 819                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
 820                 (*outval)[*outvallen] = '\0';
 821         }
 822
 823         xdr_free(xdr_ypresp_key_val, (char *)&yprkv);
 824         return (r);
 825 }
 826
 827 int
 828 yp_all(indomain, inmap, incallback)
 829         char *indomain;
 830         char *inmap;
 831         struct ypall_callback *incallback;
 832 {
 833         struct ypreq_nokey yprnk;
 834         struct dom_binding *ysd;
 835         struct timeval tv;
 836         struct sockaddr_in clnt_sin;
 837         CLIENT *clnt;
 838         u_long status, savstat;
 839         int clnt_sock;
 840
 841         /* Sanity check */
 842
 843         if (indomain == NULL || !strlen(indomain) ||
 844             inmap == NULL || !strlen(inmap))
 845                 return (YPERR_BADARGS);
 846
 847 again:
 848
 849         if (_yp_dobind(indomain, &ysd) != 0)
 850                 return (YPERR_DOMAIN);
 851
 852         tv.tv_sec = _yplib_timeout;
 853         tv.tv_usec = 0;
 854
 855         /* YPPROC_ALL manufactures its own channel to ypserv using TCP */
 856
 857         clnt_sock = RPC_ANYSOCK;
 858         clnt_sin = ysd->dom_server_addr;
 859         clnt_sin.sin_port = 0;
 860         clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
 861         if (clnt == NULL) {
 862                 printf("clnttcp_create failed\n");
 863                 return (YPERR_PMAP);
 864         }
 865
 866         yprnk.domain = indomain;
 867         yprnk.map = inmap;
 868         ypresp_allfn = incallback->foreach;
 869         ypresp_data = (void *)incallback->data;
 870
 871         if (clnt_call(clnt, YPPROC_ALL,
 872                 xdr_ypreq_nokey, &yprnk,
 873                 xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) {
 874                         clnt_perror(ysd->dom_client, "yp_all: clnt_call");
 875                         clnt_destroy(clnt);
 876                         _yp_unbind(ysd);
 877                         goto again;
 878         }
 879
 880         clnt_destroy(clnt);
 881         savstat = status;
 882         xdr_free(xdr_ypresp_all_seq, (char *)&status);  /* not really needed... */
 883         if (savstat != YP_NOMORE)
 884                 return (ypprot_err(savstat));
 885         return (0);
 886 }
 887
 888 int
 889 yp_order(indomain, inmap, outorder)
 890         char *indomain;
 891         char *inmap;
 892         int *outorder;
 893 {
 894         struct dom_binding *ysd;
 895         struct ypresp_order ypro;
 896         struct ypreq_nokey yprnk;
 897         struct timeval tv;
 898         int r;
 899
 900         /* Sanity check */
 901
 902         if (indomain == NULL || !strlen(indomain) ||
 903             inmap == NULL || !strlen(inmap))
 904                 return (YPERR_BADARGS);
 905
 906 again:
 907         if (_yp_dobind(indomain, &ysd) != 0)
 908                 return (YPERR_DOMAIN);
 909
 910         tv.tv_sec = _yplib_timeout;
 911         tv.tv_usec = 0;
 912
 913         yprnk.domain = indomain;
 914         yprnk.map = inmap;
 915
 916         bzero((char *)(char *)&ypro, sizeof ypro);
 917
 918         r = clnt_call(ysd->dom_client, YPPROC_ORDER,
 919                 xdr_ypreq_nokey, &yprnk, xdr_ypresp_order, &ypro, tv);
 920
 921         /*
 922          * NIS+ in YP compat mode doesn't support the YPPROC_ORDER
 923          * procedure.
 924          */
 925         if (r == RPC_PROCUNAVAIL) {
 926                 return(YPERR_YPERR);
 927         }
 928
 929         if (r != RPC_SUCCESS) {
 930                 clnt_perror(ysd->dom_client, "yp_order: clnt_call");
 931                 _yp_unbind(ysd);
 932                 goto again;
 933         }
 934
 935         if (!(r = ypprot_err(ypro.stat))) {
 936                 *outorder = ypro.ordernum;
 937         }
 938
 939         xdr_free(xdr_ypresp_order, (char *)&ypro);
 940         return (r);
 941 }
 942
 943 int
 944 yp_master(indomain, inmap, outname)
 945         char *indomain;
 946         char *inmap;
 947         char **outname;
 948 {
 949         struct dom_binding *ysd;
 950         struct ypresp_master yprm;
 951         struct ypreq_nokey yprnk;
 952         struct timeval tv;
 953         int r;
 954
 955         /* Sanity check */
 956
 957         if (indomain == NULL || !strlen(indomain) ||
 958             inmap == NULL || !strlen(inmap))
 959                 return (YPERR_BADARGS);
 960 again:
 961         if (_yp_dobind(indomain, &ysd) != 0)
 962                 return (YPERR_DOMAIN);
 963
 964         tv.tv_sec = _yplib_timeout;
 965         tv.tv_usec = 0;
 966
 967         yprnk.domain = indomain;
 968         yprnk.map = inmap;
 969
 970         bzero((char *)&yprm, sizeof yprm);
 971
 972         r = clnt_call(ysd->dom_client, YPPROC_MASTER,
 973                 xdr_ypreq_nokey, &yprnk, xdr_ypresp_master, &yprm, tv);
 974         if (r != RPC_SUCCESS) {
 975                 clnt_perror(ysd->dom_client, "yp_master: clnt_call");
 976                 _yp_unbind(ysd);
 977                 goto again;
 978         }
 979
 980         if (!(r = ypprot_err(yprm.stat))) {
 981                 *outname = (char *)strdup(yprm.peer);
 982         }
 983
 984         xdr_free(xdr_ypresp_master, (char *)&yprm);
 985         return (r);
 986 }
 987 int
 988 yp_maplist(indomain, outmaplist)
 989         char *indomain;
 990         struct ypmaplist **outmaplist;
 991 {
 992         struct dom_binding *ysd;
 993         struct ypresp_maplist ypml;
 994         struct timeval tv;
 995         int r;
 996
 997         /* Sanity check */
 998
 999         if (indomain == NULL || !strlen(indomain))
1000                 return (YPERR_BADARGS);
1001
1002 again:
1003         if (_yp_dobind(indomain, &ysd) != 0)
1004                 return (YPERR_DOMAIN);
1005
1006         tv.tv_sec = _yplib_timeout;
1007         tv.tv_usec = 0;
1008
1009         bzero((char *)&ypml, sizeof ypml);
1010
1011         r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
1012                 xdr_domainname,(char *)&indomain,xdr_ypresp_maplist,&ypml,tv);
1013         if (r != RPC_SUCCESS) {
1014                 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
1015                 _yp_unbind(ysd);
1016                 goto again;
1017         }
1018         if (!(r = ypprot_err(ypml.stat))) {
1019                 *outmaplist = ypml.maps;
1020         }
1021
1022         /* NO: xdr_free(xdr_ypresp_maplist, &ypml);*/
1023         return (r);
1024 }
1025
1026 char *
1027 yperr_string(incode)
1028         int incode;
1029 {
1030         static char err[80];
1031
1032         switch (incode) {
1033         case 0:
1034                 return ("Success");
1035         case YPERR_BADARGS:
1036                 return ("Request arguments bad");
1037         case YPERR_RPC:
1038                 return ("RPC failure");
1039         case YPERR_DOMAIN:
1040                 return ("Can't bind to server which serves this domain");
1041         case YPERR_MAP:
1042                 return ("No such map in server's domain");
1043         case YPERR_KEY:
1044                 return ("No such key in map");
1045         case YPERR_YPERR:
1046                 return ("YP server error");
1047         case YPERR_RESRC:
1048                 return ("Local resource allocation failure");
1049         case YPERR_NOMORE:
1050                 return ("No more records in map database");
1051         case YPERR_PMAP:
1052                 return ("Can't communicate with portmapper");
1053         case YPERR_YPBIND:
1054                 return ("Can't communicate with ypbind");
1055         case YPERR_YPSERV:
1056                 return ("Can't communicate with ypserv");
1057         case YPERR_NODOM:
1058                 return ("Local domain name not set");
1059         case YPERR_BADDB:
1060                 return ("Server data base is bad");
1061         case YPERR_VERS:
1062                 return ("YP server version mismatch - server can't supply service.");
1063         case YPERR_ACCESS:
1064                 return ("Access violation");
1065         case YPERR_BUSY:
1066                 return ("Database is busy");
1067         }
1068         sprintf(err, "YP unknown error %d\n", incode);
1069         return (err);
1070 }
1071
1072 int
1073 ypprot_err(incode)
1074         unsigned int incode;
1075 {
1076         switch (incode) {
1077         case YP_TRUE:
1078                 return (0);
1079         case YP_FALSE:
1080                 return (YPERR_YPBIND);
1081         case YP_NOMORE:
1082                 return (YPERR_NOMORE);
1083         case YP_NOMAP:
1084                 return (YPERR_MAP);
1085         case YP_NODOM:
1086                 return (YPERR_DOMAIN);
1087         case YP_NOKEY:
1088                 return (YPERR_KEY);
1089         case YP_BADOP:
1090                 return (YPERR_YPERR);
1091         case YP_BADDB:
1092                 return (YPERR_BADDB);
1093         case YP_YPERR:
1094                 return (YPERR_YPERR);
1095         case YP_BADARGS:
1096                 return (YPERR_BADARGS);
1097         case YP_VERS:
1098                 return (YPERR_VERS);
1099         }
1100         return (YPERR_YPERR);
1101 }
1102
1103 int
1104 _yp_check(dom)
1105         char **dom;
1106 {
1107         char *unused;
1108
1109         if (_yp_domain[0]=='\0')
1110                 if (yp_get_default_domain(&unused))
1111                         return (0);
1112
1113         if (dom)
1114                 *dom = _yp_domain;
1115
1116         if (yp_bind(_yp_domain) == 0) {
1117                 yp_unbind(_yp_domain);
1118                 return (1);
1119         }
1120         return (0);
1121 }