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  * $FreeBSD: src/lib/libc/yp/yplib.c,v 1.34.2.2 2002/02/15 00:46:53 des Exp $
  31  * $DragonFly: src/lib/libc/yp/yplib.c,v 1.4 2005/01/31 22:29:47 dillon Exp $
  32  */
  33
  34 #include "namespace.h"
  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 #include "un-namespace.h"
  49
  50 /*
  51  * We have to define these here due to clashes between yp_prot.h and
  52  * yp.h.
  53  */
  54
  55 #define YPMATCHCACHE
  56
  57 #ifdef YPMATCHCACHE
  58 struct ypmatch_ent {
  59         char                    *ypc_map;
  60         keydat                  ypc_key;
  61         valdat                  ypc_val;
  62         time_t                  ypc_expire_t;
  63         struct ypmatch_ent      *ypc_next;
  64 };
  65 #define YPLIB_MAXCACHE  5       /* At most 5 entries */
  66 #define YPLIB_EXPIRE    5       /* Expire after 5 seconds */
  67 #endif
  68
  69 struct dom_binding {
  70         struct dom_binding *dom_pnext;
  71         char dom_domain[YPMAXDOMAIN + 1];
  72         struct sockaddr_in dom_server_addr;
  73         u_short dom_server_port;
  74         int dom_socket;
  75         CLIENT *dom_client;
  76         u_short dom_local_port; /* now I finally know what this is for. */
  77         long dom_vers;
  78 #ifdef YPMATCHCACHE
  79         struct ypmatch_ent *cache;
  80         int ypmatch_cachecnt;
  81 #endif
  82 };
  83
  84 #include <rpcsvc/ypclnt.h>
  85
  86 #ifndef BINDINGDIR
  87 #define BINDINGDIR "/var/yp/binding"
  88 #endif
  89 #define MAX_RETRIES 20
  90
  91 extern bool_t xdr_domainname(), xdr_ypbind_resp();
  92 extern bool_t xdr_ypreq_key(), xdr_ypresp_val();
  93 extern bool_t xdr_ypreq_nokey(), xdr_ypresp_key_val();
  94 extern bool_t xdr_ypresp_all(), xdr_ypresp_all_seq();
  95 extern bool_t xdr_ypresp_master();
  96
  97 int (*ypresp_allfn)();
  98 void *ypresp_data;
  99
 100 static void _yp_unbind(struct dom_binding *);
 101 struct dom_binding *_ypbindlist;
 102 static char _yp_domain[MAXHOSTNAMELEN];
 103 int _yplib_timeout = 10;
 104
 105 #ifdef YPMATCHCACHE
 106 static void
 107 ypmatch_cache_delete(struct dom_binding *ypdb, 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
 126 ypmatch_cache_flush(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
 140 ypmatch_cache_expire(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
 163 ypmatch_cache_insert(struct dom_binding *ypdb, char *map, keydat *key,
 164     valdat *val)
 165 {
 166         struct ypmatch_ent      *new;
 167
 168         /* Do an expire run to maybe open up a slot. */
 169         if (ypdb->ypmatch_cachecnt)
 170                 ypmatch_cache_expire(ypdb);
 171
 172         /*
 173          * If there are no slots free, then force an expire of
 174          * the least recently used entry.
 175          */
 176         if (ypdb->ypmatch_cachecnt >= YPLIB_MAXCACHE) {
 177                 struct ypmatch_ent      *o = NULL, *c = ypdb->cache;
 178                 time_t                  oldest = 0;
 179
 180                 oldest = ~oldest;
 181
 182                 while (c != NULL) {
 183                         if (c->ypc_expire_t < oldest) {
 184                                 oldest = c->ypc_expire_t;
 185                                 o = c;
 186                         }
 187                         c = c->ypc_next;
 188                 }
 189
 190                 if (o == NULL)
 191                         return;
 192                 o->ypc_expire_t = 0;
 193                 ypmatch_cache_expire(ypdb);
 194         }
 195
 196         new = malloc(sizeof(struct ypmatch_ent));
 197         if (new == NULL)
 198                 return;
 199
 200         new->ypc_map = strdup(map);
 201         if (new->ypc_map == NULL) {
 202                 free(new);
 203                 return;
 204         }
 205         new->ypc_key.keydat_val = malloc(key->keydat_len);
 206         if (new->ypc_key.keydat_val == NULL) {
 207                 free(new->ypc_map);
 208                 free(new);
 209                 return;
 210         }
 211         new->ypc_val.valdat_val = malloc(val->valdat_len);
 212         if (new->ypc_val.valdat_val == NULL) {
 213                 free(new->ypc_val.valdat_val);
 214                 free(new->ypc_map);
 215                 free(new);
 216                 return;
 217         }
 218
 219         new->ypc_expire_t = time(NULL) + YPLIB_EXPIRE;
 220         new->ypc_key.keydat_len = key->keydat_len;
 221         new->ypc_val.valdat_len = val->valdat_len;
 222         bcopy(key->keydat_val, new->ypc_key.keydat_val, key->keydat_len);
 223         bcopy(val->valdat_val, new->ypc_val.valdat_val, val->valdat_len);
 224
 225         new->ypc_next = ypdb->cache;
 226         ypdb->cache = new;
 227
 228         ypdb->ypmatch_cachecnt++;
 229
 230         return;
 231 }
 232
 233 static bool_t
 234 ypmatch_cache_lookup(struct dom_binding *ypdb, char *map, keydat *key,
 235     valdat *val)
 236 {
 237         struct ypmatch_ent      *c = ypdb->cache;
 238
 239         ypmatch_cache_expire(ypdb);
 240
 241         for (c = ypdb->cache; c != NULL; c = c->ypc_next) {
 242                 if (strcmp(map, c->ypc_map))
 243                         continue;
 244                 if (key->keydat_len != c->ypc_key.keydat_len)
 245                         continue;
 246                 if (bcmp(key->keydat_val, c->ypc_key.keydat_val,
 247                                 key->keydat_len))
 248                         continue;
 249         }
 250
 251         if (c == NULL)
 252                 return(FALSE);
 253
 254         val->valdat_len = c->ypc_val.valdat_len;
 255         val->valdat_val = c->ypc_val.valdat_val;
 256
 257         return(TRUE);
 258 }
 259 #endif
 260
 261 char *
 262 ypbinderr_string(int incode)
 263 {
 264         static char err[80];
 265         switch (incode) {
 266         case 0:
 267                 return ("Success");
 268         case YPBIND_ERR_ERR:
 269                 return ("Internal ypbind error");
 270         case YPBIND_ERR_NOSERV:
 271                 return ("Domain not bound");
 272         case YPBIND_ERR_RESC:
 273                 return ("System resource allocation failure");
 274         }
 275         sprintf(err, "Unknown ypbind error: #%d\n", incode);
 276         return (err);
 277 }
 278
 279 int
 280 _yp_dobind(char *dom, struct dom_binding **ypdb)
 281 {
 282         static pid_t pid = -1;
 283         char path[MAXPATHLEN];
 284         struct dom_binding *ysd, *ysd2;
 285         struct ypbind_resp ypbr;
 286         struct timeval tv;
 287         struct sockaddr_in clnt_sin;
 288         int clnt_sock, fd;
 289         pid_t gpid;
 290         CLIENT *client;
 291         int new = 0, r;
 292         int retries = 0;
 293         struct sockaddr_in check;
 294         int checklen = sizeof(struct sockaddr_in);
 295
 296         /* Not allowed; bad doggie. Bad. */
 297         if (strchr(dom, '/') != NULL)
 298                 return(YPERR_BADARGS);
 299
 300         gpid = getpid();
 301         if (!(pid == -1 || pid == gpid)) {
 302                 ysd = _ypbindlist;
 303                 while (ysd) {
 304                         if (ysd->dom_client != NULL)
 305                                 _yp_unbind(ysd);
 306                         ysd2 = ysd->dom_pnext;
 307                         free(ysd);
 308                         ysd = ysd2;
 309                 }
 310                 _ypbindlist = NULL;
 311         }
 312         pid = gpid;
 313
 314         if (ypdb != NULL)
 315                 *ypdb = NULL;
 316
 317         if (dom == NULL || strlen(dom) == 0)
 318                 return (YPERR_BADARGS);
 319
 320         for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
 321                 if (strcmp(dom, ysd->dom_domain) == 0)
 322                         break;
 323
 324
 325         if (ysd == NULL) {
 326                 ysd = (struct dom_binding *)malloc(sizeof *ysd);
 327                 bzero((char *)ysd, sizeof *ysd);
 328                 ysd->dom_socket = -1;
 329                 ysd->dom_vers = 0;
 330                 new = 1;
 331         } else {
 332         /* Check the socket -- may have been hosed by the caller. */
 333                 if (_getsockname(ysd->dom_socket, (struct sockaddr *)&check,
 334                     &checklen) == -1 || check.sin_family != AF_INET ||
 335                     check.sin_port != ysd->dom_local_port) {
 336                 /* Socket became bogus somehow... need to rebind. */
 337                         int save, sock;
 338
 339                         sock = ysd->dom_socket;
 340                         save = _dup(ysd->dom_socket);
 341                         if (ysd->dom_client != NULL)
 342                                 clnt_destroy(ysd->dom_client);
 343                         ysd->dom_vers = 0;
 344                         ysd->dom_client = NULL;
 345                         sock = _dup2(save, sock);
 346                         _close(save);
 347                 }
 348         }
 349
 350 again:
 351         retries++;
 352         if (retries > MAX_RETRIES) {
 353                 if (new)
 354                         free(ysd);
 355                 return(YPERR_YPBIND);
 356         }
 357 #ifdef BINDINGDIR
 358         if (ysd->dom_vers == 0) {
 359                 /*
 360                  * We're trying to make a new binding: zorch the
 361                  * existing handle now (if any).
 362                  */
 363                 if (ysd->dom_client != NULL) {
 364                         clnt_destroy(ysd->dom_client);
 365                         ysd->dom_client = NULL;
 366                         ysd->dom_socket = -1;
 367                 }
 368                 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2);
 369                 if ((fd = _open(path, O_RDONLY)) == -1) {
 370                         /* no binding file, YP is dead. */
 371                         /* Try to bring it back to life. */
 372                         _close(fd);
 373                         goto skipit;
 374                 }
 375                 if (_flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
 376                         struct iovec iov[2];
 377                         struct ypbind_resp ybr;
 378                         u_short ypb_port;
 379
 380                         iov[0].iov_base = (caddr_t)&ypb_port;
 381                         iov[0].iov_len = sizeof ypb_port;
 382                         iov[1].iov_base = (caddr_t)&ybr;
 383                         iov[1].iov_len = sizeof ybr;
 384
 385                         r = _readv(fd, iov, 2);
 386                         if (r != iov[0].iov_len + iov[1].iov_len) {
 387                                 _close(fd);
 388                                 ysd->dom_vers = -1;
 389                                 goto again;
 390                         }
 391
 392                         bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
 393                         ysd->dom_server_addr.sin_family = AF_INET;
 394                         ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
 395                         ysd->dom_server_addr.sin_addr.s_addr =
 396                             *(u_long *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
 397                         ysd->dom_server_addr.sin_port =
 398                             *(u_short *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 399
 400                         ysd->dom_server_port = ysd->dom_server_addr.sin_port;
 401                         _close(fd);
 402                         goto gotit;
 403                 } else {
 404                         /* no lock on binding file, YP is dead. */
 405                         /* Try to bring it back to life. */
 406                         _close(fd);
 407                         goto skipit;
 408                 }
 409         }
 410 skipit:
 411 #endif
 412         if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
 413                 /*
 414                  * We're trying to make a new binding: zorch the
 415                  * existing handle now (if any).
 416                  */
 417                 if (ysd->dom_client != NULL) {
 418                         clnt_destroy(ysd->dom_client);
 419                         ysd->dom_client = NULL;
 420                         ysd->dom_socket = -1;
 421                 }
 422                 bzero((char *)&clnt_sin, sizeof clnt_sin);
 423                 clnt_sin.sin_family = AF_INET;
 424                 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 425
 426                 clnt_sock = RPC_ANYSOCK;
 427                 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
 428                         0, 0);
 429                 if (client == NULL) {
 430                         /*
 431                          * These conditions indicate ypbind just isn't
 432                          * alive -- we probably don't want to shoot our
 433                          * mouth off in this case; instead generate error
 434                          * messages only for really exotic problems.
 435                          */
 436                         if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED &&
 437                            (rpc_createerr.cf_stat != RPC_SYSTEMERROR &&
 438                            rpc_createerr.cf_error.re_errno == ECONNREFUSED))
 439                                 clnt_pcreateerror("clnttcp_create");
 440                         if (new)
 441                                 free(ysd);
 442                         return (YPERR_YPBIND);
 443                 }
 444
 445                 /*
 446                  * Check the port number -- should be < IPPORT_RESERVED.
 447                  * If not, it's possible someone has registered a bogus
 448                  * ypbind with the portmapper and is trying to trick us.
 449                  */
 450                 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) {
 451                         if (client != NULL)
 452                                 clnt_destroy(client);
 453                         if (new)
 454                                 free(ysd);
 455                         return(YPERR_YPBIND);
 456                 }
 457                 tv.tv_sec = _yplib_timeout/2;
 458                 tv.tv_usec = 0;
 459                 r = clnt_call(client, YPBINDPROC_DOMAIN,
 460                         xdr_domainname, (char *)&dom, xdr_ypbind_resp, &ypbr, tv);
 461                 if (r != RPC_SUCCESS) {
 462                         clnt_destroy(client);
 463                         ysd->dom_vers = -1;
 464                         if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) {
 465                                 if (new)
 466                                         free(ysd);
 467                                 return(YPERR_YPBIND);
 468                         }
 469                         fprintf(stderr,
 470                         "YP: server for domain %s not responding, retrying\n", dom);
 471                         goto again;
 472                 } else {
 473                         if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
 474                                 struct timespec time_to_sleep, time_remaining;
 475
 476                                 clnt_destroy(client);
 477                                 ysd->dom_vers = -1;
 478
 479                                 time_to_sleep.tv_sec = _yplib_timeout/2;
 480                                 time_to_sleep.tv_nsec = 0;
 481                                 _nanosleep(&time_to_sleep,
 482                                     &time_remaining);
 483                                 goto again;
 484                         }
 485                 }
 486                 clnt_destroy(client);
 487
 488                 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
 489                 ysd->dom_server_addr.sin_family = AF_INET;
 490                 ysd->dom_server_addr.sin_port =
 491                         *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 492                 ysd->dom_server_addr.sin_addr.s_addr =
 493                         *(u_long *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
 494
 495                 /*
 496                  * We could do a reserved port check here too, but this
 497                  * could pose compatibility problems. The local ypbind is
 498                  * supposed to decide whether or not to trust yp servers
 499                  * on insecure ports. For now, we trust its judgement.
 500                  */
 501                 ysd->dom_server_port =
 502                         *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 503 gotit:
 504                 ysd->dom_vers = YPVERS;
 505                 strlcpy(ysd->dom_domain, dom, sizeof(ysd->dom_domain));
 506         }
 507
 508         /* Don't rebuild the connection to the server unless we have to. */
 509         if (ysd->dom_client == NULL) {
 510                 tv.tv_sec = _yplib_timeout/2;
 511                 tv.tv_usec = 0;
 512                 ysd->dom_socket = RPC_ANYSOCK;
 513                 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr,
 514                         YPPROG, YPVERS, tv, &ysd->dom_socket, 1280, 2304);
 515                 if (ysd->dom_client == NULL) {
 516                         clnt_pcreateerror("clntudp_create");
 517                         ysd->dom_vers = -1;
 518                         goto again;
 519                 }
 520                 if (_fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
 521                         perror("fcntl: F_SETFD");
 522                 /*
 523                  * We want a port number associated with this socket
 524                  * so that we can check its authenticity later.
 525                  */
 526                 checklen = sizeof(struct sockaddr_in);
 527                 bzero((char *)&check, checklen);
 528                 _bind(ysd->dom_socket, (struct sockaddr *)&check, checklen);
 529                 check.sin_family = AF_INET;
 530                 if (!_getsockname(ysd->dom_socket,
 531                     (struct sockaddr *)&check, &checklen)) {
 532                         ysd->dom_local_port = check.sin_port;
 533                 } else {
 534                         clnt_destroy(ysd->dom_client);
 535                         if (new)
 536                                 free(ysd);
 537                         return(YPERR_YPBIND);
 538                 }
 539         }
 540
 541         if (new) {
 542                 ysd->dom_pnext = _ypbindlist;
 543                 _ypbindlist = ysd;
 544         }
 545
 546         if (ypdb != NULL)
 547                 *ypdb = ysd;
 548         return (0);
 549 }
 550
 551 static void
 552 _yp_unbind(struct dom_binding *ypb)
 553 {
 554         struct sockaddr_in check;
 555         int checklen = sizeof(struct sockaddr_in);
 556
 557         if (ypb->dom_client != NULL) {
 558                 /* Check the socket -- may have been hosed by the caller. */
 559                 if (_getsockname(ypb->dom_socket, (struct sockaddr *)&check,
 560                 &checklen) == -1 || check.sin_family != AF_INET ||
 561                 check.sin_port != ypb->dom_local_port) {
 562                         int save, sock;
 563
 564                         sock = ypb->dom_socket;
 565                         save = _dup(ypb->dom_socket);
 566                         clnt_destroy(ypb->dom_client);
 567                         sock = _dup2(save, sock);
 568                         _close(save);
 569                 } else
 570                         clnt_destroy(ypb->dom_client);
 571         }
 572
 573         ypb->dom_client = NULL;
 574         ypb->dom_socket = -1;
 575         ypb->dom_vers = -1;
 576 #ifdef YPMATCHCACHE
 577         ypmatch_cache_flush(ypb);
 578 #endif
 579 }
 580
 581 int
 582 yp_bind(char *dom)
 583 {
 584         return (_yp_dobind(dom, NULL));
 585 }
 586
 587 void
 588 yp_unbind(char *dom)
 589 {
 590         struct dom_binding *ypb, *ypbp;
 591
 592         ypbp = NULL;
 593         for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
 594                 if (strcmp(dom, ypb->dom_domain) == 0) {
 595                         _yp_unbind(ypb);
 596                         if (ypbp)
 597                                 ypbp->dom_pnext = ypb->dom_pnext;
 598                         else
 599                                 _ypbindlist = ypb->dom_pnext;
 600                         free(ypb);
 601                         return;
 602                 }
 603                 ypbp = ypb;
 604         }
 605         return;
 606 }
 607
 608 int
 609 yp_match(char *indomain, char *inmap, const char *inkey, int inkeylen,
 610     char **outval, int *outvallen)
 611 {
 612         struct dom_binding *ysd;
 613         struct ypresp_val yprv;
 614         struct timeval tv;
 615         struct ypreq_key yprk;
 616         int r;
 617
 618         *outval = NULL;
 619         *outvallen = 0;
 620
 621         /* Sanity check */
 622
 623         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
 624             inmap == NULL || !strlen(inmap) ||
 625             indomain == NULL || !strlen(indomain))
 626                 return (YPERR_BADARGS);
 627
 628         if (_yp_dobind(indomain, &ysd) != 0)
 629                 return(YPERR_DOMAIN);
 630
 631         yprk.domain = indomain;
 632         yprk.map = inmap;
 633         yprk.key.keydat_val = (char *)inkey;
 634         yprk.key.keydat_len = inkeylen;
 635
 636 #ifdef YPMATCHCACHE
 637         if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) {
 638 /*
 639         if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
 640             inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) {
 641 */
 642                 *outvallen = yprv.val.valdat_len;
 643                 *outval = (char *)malloc(*outvallen+1);
 644                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
 645                 (*outval)[*outvallen] = '\0';
 646                 return (0);
 647         }
 648 #endif
 649
 650 again:
 651         if (_yp_dobind(indomain, &ysd) != 0)
 652                 return (YPERR_DOMAIN);
 653
 654         tv.tv_sec = _yplib_timeout;
 655         tv.tv_usec = 0;
 656
 657         bzero((char *)&yprv, sizeof yprv);
 658
 659         r = clnt_call(ysd->dom_client, YPPROC_MATCH,
 660                 xdr_ypreq_key, &yprk, xdr_ypresp_val, &yprv, tv);
 661         if (r != RPC_SUCCESS) {
 662                 clnt_perror(ysd->dom_client, "yp_match: clnt_call");
 663                 _yp_unbind(ysd);
 664                 goto again;
 665         }
 666
 667         if (!(r = ypprot_err(yprv.stat))) {
 668                 *outvallen = yprv.val.valdat_len;
 669                 *outval = (char *)malloc(*outvallen+1);
 670                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
 671                 (*outval)[*outvallen] = '\0';
 672 #ifdef YPMATCHCACHE
 673                 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val);
 674 #endif
 675         }
 676
 677         xdr_free(xdr_ypresp_val, (char *)&yprv);
 678         return (r);
 679 }
 680
 681 int
 682 yp_get_default_domain(char **domp)
 683 {
 684         *domp = NULL;
 685         if (_yp_domain[0] == '\0')
 686                 if (getdomainname(_yp_domain, sizeof _yp_domain))
 687                         return (YPERR_NODOM);
 688         *domp = _yp_domain;
 689         return (0);
 690 }
 691
 692 int
 693 yp_first(char *indomain, char *inmap, char **outkey, int *outkeylen,
 694     char **outval, int *outvallen)
 695 {
 696         struct ypresp_key_val yprkv;
 697         struct ypreq_nokey yprnk;
 698         struct dom_binding *ysd;
 699         struct timeval tv;
 700         int r;
 701
 702         /* Sanity check */
 703
 704         if (indomain == NULL || !strlen(indomain) ||
 705             inmap == NULL || !strlen(inmap))
 706                 return (YPERR_BADARGS);
 707
 708         *outkey = *outval = NULL;
 709         *outkeylen = *outvallen = 0;
 710
 711 again:
 712         if (_yp_dobind(indomain, &ysd) != 0)
 713                 return (YPERR_DOMAIN);
 714
 715         tv.tv_sec = _yplib_timeout;
 716         tv.tv_usec = 0;
 717
 718         yprnk.domain = indomain;
 719         yprnk.map = inmap;
 720         bzero((char *)&yprkv, sizeof yprkv);
 721
 722         r = clnt_call(ysd->dom_client, YPPROC_FIRST,
 723                 xdr_ypreq_nokey, &yprnk, xdr_ypresp_key_val, &yprkv, tv);
 724         if (r != RPC_SUCCESS) {
 725                 clnt_perror(ysd->dom_client, "yp_first: clnt_call");
 726                 _yp_unbind(ysd);
 727                 goto again;
 728         }
 729         if (!(r = ypprot_err(yprkv.stat))) {
 730                 *outkeylen = yprkv.key.keydat_len;
 731                 *outkey = (char *)malloc(*outkeylen+1);
 732                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
 733                 (*outkey)[*outkeylen] = '\0';
 734                 *outvallen = yprkv.val.valdat_len;
 735                 *outval = (char *)malloc(*outvallen+1);
 736                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
 737                 (*outval)[*outvallen] = '\0';
 738         }
 739
 740         xdr_free(xdr_ypresp_key_val, (char *)&yprkv);
 741         return (r);
 742 }
 743
 744 int
 745 yp_next(char *indomain, char *inmap, char *inkey, int inkeylen,
 746     char **outkey, int *outkeylen, char **outval, int *outvallen)
 747 {
 748         struct ypresp_key_val yprkv;
 749         struct ypreq_key yprk;
 750         struct dom_binding *ysd;
 751         struct timeval tv;
 752         int r;
 753
 754         /* Sanity check */
 755
 756         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
 757             inmap == NULL || !strlen(inmap) ||
 758             indomain == NULL || !strlen(indomain))
 759                 return (YPERR_BADARGS);
 760
 761         *outkey = *outval = NULL;
 762         *outkeylen = *outvallen = 0;
 763
 764 again:
 765         if (_yp_dobind(indomain, &ysd) != 0)
 766                 return (YPERR_DOMAIN);
 767
 768         tv.tv_sec = _yplib_timeout;
 769         tv.tv_usec = 0;
 770
 771         yprk.domain = indomain;
 772         yprk.map = inmap;
 773         yprk.key.keydat_val = inkey;
 774         yprk.key.keydat_len = inkeylen;
 775         bzero((char *)&yprkv, sizeof yprkv);
 776
 777         r = clnt_call(ysd->dom_client, YPPROC_NEXT,
 778                 xdr_ypreq_key, &yprk, xdr_ypresp_key_val, &yprkv, tv);
 779         if (r != RPC_SUCCESS) {
 780                 clnt_perror(ysd->dom_client, "yp_next: clnt_call");
 781                 _yp_unbind(ysd);
 782                 goto again;
 783         }
 784         if (!(r = ypprot_err(yprkv.stat))) {
 785                 *outkeylen = yprkv.key.keydat_len;
 786                 *outkey = (char *)malloc(*outkeylen+1);
 787                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
 788                 (*outkey)[*outkeylen] = '\0';
 789                 *outvallen = yprkv.val.valdat_len;
 790                 *outval = (char *)malloc(*outvallen+1);
 791                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
 792                 (*outval)[*outvallen] = '\0';
 793         }
 794
 795         xdr_free(xdr_ypresp_key_val, (char *)&yprkv);
 796         return (r);
 797 }
 798
 799 int
 800 yp_all(char *indomain, char *inmap, struct ypall_callback *incallback)
 801 {
 802         struct ypreq_nokey yprnk;
 803         struct dom_binding *ysd;
 804         struct timeval tv;
 805         struct sockaddr_in clnt_sin;
 806         CLIENT *clnt;
 807         u_long status, savstat;
 808         int clnt_sock;
 809
 810         /* Sanity check */
 811
 812         if (indomain == NULL || !strlen(indomain) ||
 813             inmap == NULL || !strlen(inmap))
 814                 return (YPERR_BADARGS);
 815
 816 again:
 817
 818         if (_yp_dobind(indomain, &ysd) != 0)
 819                 return (YPERR_DOMAIN);
 820
 821         tv.tv_sec = _yplib_timeout;
 822         tv.tv_usec = 0;
 823
 824         /* YPPROC_ALL manufactures its own channel to ypserv using TCP */
 825
 826         clnt_sock = RPC_ANYSOCK;
 827         clnt_sin = ysd->dom_server_addr;
 828         clnt_sin.sin_port = 0;
 829         clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
 830         if (clnt == NULL) {
 831                 printf("clnttcp_create failed\n");
 832                 return (YPERR_PMAP);
 833         }
 834
 835         yprnk.domain = indomain;
 836         yprnk.map = inmap;
 837         ypresp_allfn = incallback->foreach;
 838         ypresp_data = (void *)incallback->data;
 839
 840         if (clnt_call(clnt, YPPROC_ALL,
 841                 xdr_ypreq_nokey, &yprnk,
 842                 xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) {
 843                         clnt_perror(ysd->dom_client, "yp_all: clnt_call");
 844                         clnt_destroy(clnt);
 845                         _yp_unbind(ysd);
 846                         goto again;
 847         }
 848
 849         clnt_destroy(clnt);
 850         savstat = status;
 851         xdr_free(xdr_ypresp_all_seq, (char *)&status);  /* not really needed... */
 852         if (savstat != YP_NOMORE)
 853                 return (ypprot_err(savstat));
 854         return (0);
 855 }
 856
 857 int
 858 yp_order(char *indomain, char *inmap, int *outorder)
 859 {
 860         struct dom_binding *ysd;
 861         struct ypresp_order ypro;
 862         struct ypreq_nokey yprnk;
 863         struct timeval tv;
 864         int r;
 865
 866         /* Sanity check */
 867
 868         if (indomain == NULL || !strlen(indomain) ||
 869             inmap == NULL || !strlen(inmap))
 870                 return (YPERR_BADARGS);
 871
 872 again:
 873         if (_yp_dobind(indomain, &ysd) != 0)
 874                 return (YPERR_DOMAIN);
 875
 876         tv.tv_sec = _yplib_timeout;
 877         tv.tv_usec = 0;
 878
 879         yprnk.domain = indomain;
 880         yprnk.map = inmap;
 881
 882         bzero((char *)(char *)&ypro, sizeof ypro);
 883
 884         r = clnt_call(ysd->dom_client, YPPROC_ORDER,
 885                 xdr_ypreq_nokey, &yprnk, xdr_ypresp_order, &ypro, tv);
 886
 887         /*
 888          * NIS+ in YP compat mode doesn't support the YPPROC_ORDER
 889          * procedure.
 890          */
 891         if (r == RPC_PROCUNAVAIL) {
 892                 return(YPERR_YPERR);
 893         }
 894
 895         if (r != RPC_SUCCESS) {
 896                 clnt_perror(ysd->dom_client, "yp_order: clnt_call");
 897                 _yp_unbind(ysd);
 898                 goto again;
 899         }
 900
 901         if (!(r = ypprot_err(ypro.stat))) {
 902                 *outorder = ypro.ordernum;
 903         }
 904
 905         xdr_free(xdr_ypresp_order, (char *)&ypro);
 906         return (r);
 907 }
 908
 909 int
 910 yp_master(char *indomain, char *inmap, char **outname)
 911 {
 912         struct dom_binding *ysd;
 913         struct ypresp_master yprm;
 914         struct ypreq_nokey yprnk;
 915         struct timeval tv;
 916         int r;
 917
 918         /* Sanity check */
 919
 920         if (indomain == NULL || !strlen(indomain) ||
 921             inmap == NULL || !strlen(inmap))
 922                 return (YPERR_BADARGS);
 923 again:
 924         if (_yp_dobind(indomain, &ysd) != 0)
 925                 return (YPERR_DOMAIN);
 926
 927         tv.tv_sec = _yplib_timeout;
 928         tv.tv_usec = 0;
 929
 930         yprnk.domain = indomain;
 931         yprnk.map = inmap;
 932
 933         bzero((char *)&yprm, sizeof yprm);
 934
 935         r = clnt_call(ysd->dom_client, YPPROC_MASTER,
 936                 xdr_ypreq_nokey, &yprnk, xdr_ypresp_master, &yprm, tv);
 937         if (r != RPC_SUCCESS) {
 938                 clnt_perror(ysd->dom_client, "yp_master: clnt_call");
 939                 _yp_unbind(ysd);
 940                 goto again;
 941         }
 942
 943         if (!(r = ypprot_err(yprm.stat))) {
 944                 *outname = (char *)strdup(yprm.peer);
 945         }
 946
 947         xdr_free(xdr_ypresp_master, (char *)&yprm);
 948         return (r);
 949 }
 950
 951 int
 952 yp_maplist(char *indomain, struct ypmaplist **outmaplist)
 953 {
 954         struct dom_binding *ysd;
 955         struct ypresp_maplist ypml;
 956         struct timeval tv;
 957         int r;
 958
 959         /* Sanity check */
 960
 961         if (indomain == NULL || !strlen(indomain))
 962                 return (YPERR_BADARGS);
 963
 964 again:
 965         if (_yp_dobind(indomain, &ysd) != 0)
 966                 return (YPERR_DOMAIN);
 967
 968         tv.tv_sec = _yplib_timeout;
 969         tv.tv_usec = 0;
 970
 971         bzero((char *)&ypml, sizeof ypml);
 972
 973         r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
 974                 xdr_domainname,(char *)&indomain,xdr_ypresp_maplist,&ypml,tv);
 975         if (r != RPC_SUCCESS) {
 976                 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
 977                 _yp_unbind(ysd);
 978                 goto again;
 979         }
 980         if (!(r = ypprot_err(ypml.stat))) {
 981                 *outmaplist = ypml.maps;
 982         }
 983
 984         /* NO: xdr_free(xdr_ypresp_maplist, &ypml);*/
 985         return (r);
 986 }
 987
 988 char *
 989 yperr_string(int incode)
 990 {
 991         static char err[80];
 992
 993         switch (incode) {
 994         case 0:
 995                 return ("Success");
 996         case YPERR_BADARGS:
 997                 return ("Request arguments bad");
 998         case YPERR_RPC:
 999                 return ("RPC failure");
1000         case YPERR_DOMAIN:
1001                 return ("Can't bind to server which serves this domain");
1002         case YPERR_MAP:
1003                 return ("No such map in server's domain");
1004         case YPERR_KEY:
1005                 return ("No such key in map");
1006         case YPERR_YPERR:
1007                 return ("YP server error");
1008         case YPERR_RESRC:
1009                 return ("Local resource allocation failure");
1010         case YPERR_NOMORE:
1011                 return ("No more records in map database");
1012         case YPERR_PMAP:
1013                 return ("Can't communicate with portmapper");
1014         case YPERR_YPBIND:
1015                 return ("Can't communicate with ypbind");
1016         case YPERR_YPSERV:
1017                 return ("Can't communicate with ypserv");
1018         case YPERR_NODOM:
1019                 return ("Local domain name not set");
1020         case YPERR_BADDB:
1021                 return ("Server data base is bad");
1022         case YPERR_VERS:
1023                 return ("YP server version mismatch - server can't supply service.");
1024         case YPERR_ACCESS:
1025                 return ("Access violation");
1026         case YPERR_BUSY:
1027                 return ("Database is busy");
1028         }
1029         sprintf(err, "YP unknown error %d\n", incode);
1030         return (err);
1031 }
1032
1033 int
1034 ypprot_err(unsigned int incode)
1035 {
1036         switch (incode) {
1037         case YP_TRUE:
1038                 return (0);
1039         case YP_FALSE:
1040                 return (YPERR_YPBIND);
1041         case YP_NOMORE:
1042                 return (YPERR_NOMORE);
1043         case YP_NOMAP:
1044                 return (YPERR_MAP);
1045         case YP_NODOM:
1046                 return (YPERR_DOMAIN);
1047         case YP_NOKEY:
1048                 return (YPERR_KEY);
1049         case YP_BADOP:
1050                 return (YPERR_YPERR);
1051         case YP_BADDB:
1052                 return (YPERR_BADDB);
1053         case YP_YPERR:
1054                 return (YPERR_YPERR);
1055         case YP_BADARGS:
1056                 return (YPERR_BADARGS);
1057         case YP_VERS:
1058                 return (YPERR_VERS);
1059         }
1060         return (YPERR_YPERR);
1061 }
1062
1063 int
1064 _yp_check(char **dom)
1065 {
1066         char *unused;
1067
1068         if (_yp_domain[0]=='\0')
1069                 if (yp_get_default_domain(&unused))
1070                         return (0);
1071
1072         if (dom)
1073                 *dom = _yp_domain;
1074
1075         if (yp_bind(_yp_domain) == 0) {
1076                 yp_unbind(_yp_domain);
1077                 return (1);
1078         }
1079         return (0);
1080 }