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 1.3 2004/07/05 17:31:02 eirikn 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
 105 ypmatch_cache_delete(struct dom_binding *ypdb, struct ypmatch_ent *prev,
 106     struct ypmatch_ent *cur)
 107 {
 108         if (prev == NULL)
 109                 ypdb->cache = cur->ypc_next;
 110         else
 111                 prev->ypc_next = cur->ypc_next;
 112
 113         free(cur->ypc_map);
 114         free(cur->ypc_key.keydat_val);
 115         free(cur->ypc_val.valdat_val);
 116         free(cur);
 117
 118         ypdb->ypmatch_cachecnt--;
 119
 120         return;
 121 }
 122
 123 static void
 124 ypmatch_cache_flush(struct dom_binding *ypdb)
 125 {
 126         struct ypmatch_ent      *n, *c = ypdb->cache;
 127
 128         while (c != NULL) {
 129                 n = c->ypc_next;
 130                 ypmatch_cache_delete(ypdb, NULL, c);
 131                 c = n;
 132         }
 133
 134         return;
 135 }
 136
 137 static void
 138 ypmatch_cache_expire(struct dom_binding *ypdb)
 139 {
 140         struct ypmatch_ent      *c = ypdb->cache;
 141         struct ypmatch_ent      *n, *p = NULL;
 142         time_t                  t;
 143
 144         time(&t);
 145
 146         while (c != NULL) {
 147                 if (t >= c->ypc_expire_t) {
 148                         n = c->ypc_next;
 149                         ypmatch_cache_delete(ypdb, p, c);
 150                         c = n;
 151                 } else {
 152                         p = c;
 153                         c = c->ypc_next;
 154                 }
 155         }
 156
 157         return;
 158 }
 159
 160 static void
 161 ypmatch_cache_insert(struct dom_binding *ypdb, char *map, keydat *key,
 162     valdat *val)
 163 {
 164         struct ypmatch_ent      *new;
 165
 166         /* Do an expire run to maybe open up a slot. */
 167         if (ypdb->ypmatch_cachecnt)
 168                 ypmatch_cache_expire(ypdb);
 169
 170         /*
 171          * If there are no slots free, then force an expire of
 172          * the least recently used entry.
 173          */
 174         if (ypdb->ypmatch_cachecnt >= YPLIB_MAXCACHE) {
 175                 struct ypmatch_ent      *o = NULL, *c = ypdb->cache;
 176                 time_t                  oldest = 0;
 177
 178                 oldest = ~oldest;
 179
 180                 while (c != NULL) {
 181                         if (c->ypc_expire_t < oldest) {
 182                                 oldest = c->ypc_expire_t;
 183                                 o = c;
 184                         }
 185                         c = c->ypc_next;
 186                 }
 187
 188                 if (o == NULL)
 189                         return;
 190                 o->ypc_expire_t = 0;
 191                 ypmatch_cache_expire(ypdb);
 192         }
 193
 194         new = malloc(sizeof(struct ypmatch_ent));
 195         if (new == NULL)
 196                 return;
 197
 198         new->ypc_map = strdup(map);
 199         if (new->ypc_map == NULL) {
 200                 free(new);
 201                 return;
 202         }
 203         new->ypc_key.keydat_val = malloc(key->keydat_len);
 204         if (new->ypc_key.keydat_val == NULL) {
 205                 free(new->ypc_map);
 206                 free(new);
 207                 return;
 208         }
 209         new->ypc_val.valdat_val = malloc(val->valdat_len);
 210         if (new->ypc_val.valdat_val == NULL) {
 211                 free(new->ypc_val.valdat_val);
 212                 free(new->ypc_map);
 213                 free(new);
 214                 return;
 215         }
 216
 217         new->ypc_expire_t = time(NULL) + YPLIB_EXPIRE;
 218         new->ypc_key.keydat_len = key->keydat_len;
 219         new->ypc_val.valdat_len = val->valdat_len;
 220         bcopy(key->keydat_val, new->ypc_key.keydat_val, key->keydat_len);
 221         bcopy(val->valdat_val, new->ypc_val.valdat_val, val->valdat_len);
 222
 223         new->ypc_next = ypdb->cache;
 224         ypdb->cache = new;
 225
 226         ypdb->ypmatch_cachecnt++;
 227
 228         return;
 229 }
 230
 231 static bool_t
 232 ypmatch_cache_lookup(struct dom_binding *ypdb, char *map, keydat *key,
 233     valdat *val)
 234 {
 235         struct ypmatch_ent      *c = ypdb->cache;
 236
 237         ypmatch_cache_expire(ypdb);
 238
 239         for (c = ypdb->cache; c != NULL; c = c->ypc_next) {
 240                 if (strcmp(map, c->ypc_map))
 241                         continue;
 242                 if (key->keydat_len != c->ypc_key.keydat_len)
 243                         continue;
 244                 if (bcmp(key->keydat_val, c->ypc_key.keydat_val,
 245                                 key->keydat_len))
 246                         continue;
 247         }
 248
 249         if (c == NULL)
 250                 return(FALSE);
 251
 252         val->valdat_len = c->ypc_val.valdat_len;
 253         val->valdat_val = c->ypc_val.valdat_val;
 254
 255         return(TRUE);
 256 }
 257 #endif
 258
 259 char *
 260 ypbinderr_string(int incode)
 261 {
 262         static char err[80];
 263         switch (incode) {
 264         case 0:
 265                 return ("Success");
 266         case YPBIND_ERR_ERR:
 267                 return ("Internal ypbind error");
 268         case YPBIND_ERR_NOSERV:
 269                 return ("Domain not bound");
 270         case YPBIND_ERR_RESC:
 271                 return ("System resource allocation failure");
 272         }
 273         sprintf(err, "Unknown ypbind error: #%d\n", incode);
 274         return (err);
 275 }
 276
 277 int
 278 _yp_dobind(char *dom, struct dom_binding **ypdb)
 279 {
 280         static pid_t pid = -1;
 281         char path[MAXPATHLEN];
 282         struct dom_binding *ysd, *ysd2;
 283         struct ypbind_resp ypbr;
 284         struct timeval tv;
 285         struct sockaddr_in clnt_sin;
 286         int clnt_sock, fd;
 287         pid_t gpid;
 288         CLIENT *client;
 289         int new = 0, r;
 290         int retries = 0;
 291         struct sockaddr_in check;
 292         int checklen = sizeof(struct sockaddr_in);
 293
 294         /* Not allowed; bad doggie. Bad. */
 295         if (strchr(dom, '/') != NULL)
 296                 return(YPERR_BADARGS);
 297
 298         gpid = getpid();
 299         if (!(pid == -1 || pid == gpid)) {
 300                 ysd = _ypbindlist;
 301                 while (ysd) {
 302                         if (ysd->dom_client != NULL)
 303                                 _yp_unbind(ysd);
 304                         ysd2 = ysd->dom_pnext;
 305                         free(ysd);
 306                         ysd = ysd2;
 307                 }
 308                 _ypbindlist = NULL;
 309         }
 310         pid = gpid;
 311
 312         if (ypdb != NULL)
 313                 *ypdb = NULL;
 314
 315         if (dom == NULL || strlen(dom) == 0)
 316                 return (YPERR_BADARGS);
 317
 318         for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
 319                 if (strcmp(dom, ysd->dom_domain) == 0)
 320                         break;
 321
 322
 323         if (ysd == NULL) {
 324                 ysd = (struct dom_binding *)malloc(sizeof *ysd);
 325                 bzero((char *)ysd, sizeof *ysd);
 326                 ysd->dom_socket = -1;
 327                 ysd->dom_vers = 0;
 328                 new = 1;
 329         } else {
 330         /* Check the socket -- may have been hosed by the caller. */
 331                 if (getsockname(ysd->dom_socket, (struct sockaddr *)&check,
 332                     &checklen) == -1 || check.sin_family != AF_INET ||
 333                     check.sin_port != ysd->dom_local_port) {
 334                 /* Socket became bogus somehow... need to rebind. */
 335                         int save, sock;
 336
 337                         sock = ysd->dom_socket;
 338                         save = dup(ysd->dom_socket);
 339                         if (ysd->dom_client != NULL)
 340                                 clnt_destroy(ysd->dom_client);
 341                         ysd->dom_vers = 0;
 342                         ysd->dom_client = NULL;
 343                         sock = dup2(save, sock);
 344                         _close(save);
 345                 }
 346         }
 347
 348 again:
 349         retries++;
 350         if (retries > MAX_RETRIES) {
 351                 if (new)
 352                         free(ysd);
 353                 return(YPERR_YPBIND);
 354         }
 355 #ifdef BINDINGDIR
 356         if (ysd->dom_vers == 0) {
 357                 /*
 358                  * We're trying to make a new binding: zorch the
 359                  * existing handle now (if any).
 360                  */
 361                 if (ysd->dom_client != NULL) {
 362                         clnt_destroy(ysd->dom_client);
 363                         ysd->dom_client = NULL;
 364                         ysd->dom_socket = -1;
 365                 }
 366                 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2);
 367                 if ((fd = _open(path, O_RDONLY)) == -1) {
 368                         /* no binding file, YP is dead. */
 369                         /* Try to bring it back to life. */
 370                         _close(fd);
 371                         goto skipit;
 372                 }
 373                 if (flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
 374                         struct iovec iov[2];
 375                         struct ypbind_resp ybr;
 376                         u_short ypb_port;
 377
 378                         iov[0].iov_base = (caddr_t)&ypb_port;
 379                         iov[0].iov_len = sizeof ypb_port;
 380                         iov[1].iov_base = (caddr_t)&ybr;
 381                         iov[1].iov_len = sizeof ybr;
 382
 383                         r = readv(fd, iov, 2);
 384                         if (r != iov[0].iov_len + iov[1].iov_len) {
 385                                 _close(fd);
 386                                 ysd->dom_vers = -1;
 387                                 goto again;
 388                         }
 389
 390                         bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
 391                         ysd->dom_server_addr.sin_family = AF_INET;
 392                         ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
 393                         ysd->dom_server_addr.sin_addr.s_addr =
 394                             *(u_long *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
 395                         ysd->dom_server_addr.sin_port =
 396                             *(u_short *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 397
 398                         ysd->dom_server_port = ysd->dom_server_addr.sin_port;
 399                         _close(fd);
 400                         goto gotit;
 401                 } else {
 402                         /* no lock on binding file, YP is dead. */
 403                         /* Try to bring it back to life. */
 404                         _close(fd);
 405                         goto skipit;
 406                 }
 407         }
 408 skipit:
 409 #endif
 410         if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
 411                 /*
 412                  * We're trying to make a new binding: zorch the
 413                  * existing handle now (if any).
 414                  */
 415                 if (ysd->dom_client != NULL) {
 416                         clnt_destroy(ysd->dom_client);
 417                         ysd->dom_client = NULL;
 418                         ysd->dom_socket = -1;
 419                 }
 420                 bzero((char *)&clnt_sin, sizeof clnt_sin);
 421                 clnt_sin.sin_family = AF_INET;
 422                 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 423
 424                 clnt_sock = RPC_ANYSOCK;
 425                 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
 426                         0, 0);
 427                 if (client == NULL) {
 428                         /*
 429                          * These conditions indicate ypbind just isn't
 430                          * alive -- we probably don't want to shoot our
 431                          * mouth off in this case; instead generate error
 432                          * messages only for really exotic problems.
 433                          */
 434                         if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED &&
 435                            (rpc_createerr.cf_stat != RPC_SYSTEMERROR &&
 436                            rpc_createerr.cf_error.re_errno == ECONNREFUSED))
 437                                 clnt_pcreateerror("clnttcp_create");
 438                         if (new)
 439                                 free(ysd);
 440                         return (YPERR_YPBIND);
 441                 }
 442
 443                 /*
 444                  * Check the port number -- should be < IPPORT_RESERVED.
 445                  * If not, it's possible someone has registered a bogus
 446                  * ypbind with the portmapper and is trying to trick us.
 447                  */
 448                 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) {
 449                         if (client != NULL)
 450                                 clnt_destroy(client);
 451                         if (new)
 452                                 free(ysd);
 453                         return(YPERR_YPBIND);
 454                 }
 455                 tv.tv_sec = _yplib_timeout/2;
 456                 tv.tv_usec = 0;
 457                 r = clnt_call(client, YPBINDPROC_DOMAIN,
 458                         xdr_domainname, (char *)&dom, xdr_ypbind_resp, &ypbr, tv);
 459                 if (r != RPC_SUCCESS) {
 460                         clnt_destroy(client);
 461                         ysd->dom_vers = -1;
 462                         if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) {
 463                                 if (new)
 464                                         free(ysd);
 465                                 return(YPERR_YPBIND);
 466                         }
 467                         fprintf(stderr,
 468                         "YP: server for domain %s not responding, retrying\n", dom);
 469                         goto again;
 470                 } else {
 471                         if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
 472                                 struct timespec time_to_sleep, time_remaining;
 473
 474                                 clnt_destroy(client);
 475                                 ysd->dom_vers = -1;
 476
 477                                 time_to_sleep.tv_sec = _yplib_timeout/2;
 478                                 time_to_sleep.tv_nsec = 0;
 479                                 _nanosleep(&time_to_sleep,
 480                                     &time_remaining);
 481                                 goto again;
 482                         }
 483                 }
 484                 clnt_destroy(client);
 485
 486                 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
 487                 ysd->dom_server_addr.sin_family = AF_INET;
 488                 ysd->dom_server_addr.sin_port =
 489                         *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 490                 ysd->dom_server_addr.sin_addr.s_addr =
 491                         *(u_long *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
 492
 493                 /*
 494                  * We could do a reserved port check here too, but this
 495                  * could pose compatibility problems. The local ypbind is
 496                  * supposed to decide whether or not to trust yp servers
 497                  * on insecure ports. For now, we trust its judgement.
 498                  */
 499                 ysd->dom_server_port =
 500                         *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 501 gotit:
 502                 ysd->dom_vers = YPVERS;
 503                 strlcpy(ysd->dom_domain, dom, sizeof(ysd->dom_domain));
 504         }
 505
 506         /* Don't rebuild the connection to the server unless we have to. */
 507         if (ysd->dom_client == NULL) {
 508                 tv.tv_sec = _yplib_timeout/2;
 509                 tv.tv_usec = 0;
 510                 ysd->dom_socket = RPC_ANYSOCK;
 511                 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr,
 512                         YPPROG, YPVERS, tv, &ysd->dom_socket, 1280, 2304);
 513                 if (ysd->dom_client == NULL) {
 514                         clnt_pcreateerror("clntudp_create");
 515                         ysd->dom_vers = -1;
 516                         goto again;
 517                 }
 518                 if (_fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
 519                         perror("fcntl: F_SETFD");
 520                 /*
 521                  * We want a port number associated with this socket
 522                  * so that we can check its authenticity later.
 523                  */
 524                 checklen = sizeof(struct sockaddr_in);
 525                 bzero((char *)&check, checklen);
 526                 bind(ysd->dom_socket, (struct sockaddr *)&check, checklen);
 527                 check.sin_family = AF_INET;
 528                 if (!getsockname(ysd->dom_socket,
 529                     (struct sockaddr *)&check, &checklen)) {
 530                         ysd->dom_local_port = check.sin_port;
 531                 } else {
 532                         clnt_destroy(ysd->dom_client);
 533                         if (new)
 534                                 free(ysd);
 535                         return(YPERR_YPBIND);
 536                 }
 537         }
 538
 539         if (new) {
 540                 ysd->dom_pnext = _ypbindlist;
 541                 _ypbindlist = ysd;
 542         }
 543
 544         if (ypdb != NULL)
 545                 *ypdb = ysd;
 546         return (0);
 547 }
 548
 549 static void
 550 _yp_unbind(struct dom_binding *ypb)
 551 {
 552         struct sockaddr_in check;
 553         int checklen = sizeof(struct sockaddr_in);
 554
 555         if (ypb->dom_client != NULL) {
 556                 /* Check the socket -- may have been hosed by the caller. */
 557                 if (getsockname(ypb->dom_socket, (struct sockaddr *)&check,
 558                 &checklen) == -1 || check.sin_family != AF_INET ||
 559                 check.sin_port != ypb->dom_local_port) {
 560                         int save, sock;
 561
 562                         sock = ypb->dom_socket;
 563                         save = dup(ypb->dom_socket);
 564                         clnt_destroy(ypb->dom_client);
 565                         sock = dup2(save, sock);
 566                         _close(save);
 567                 } else
 568                         clnt_destroy(ypb->dom_client);
 569         }
 570
 571         ypb->dom_client = NULL;
 572         ypb->dom_socket = -1;
 573         ypb->dom_vers = -1;
 574 #ifdef YPMATCHCACHE
 575         ypmatch_cache_flush(ypb);
 576 #endif
 577 }
 578
 579 int
 580 yp_bind(char *dom)
 581 {
 582         return (_yp_dobind(dom, NULL));
 583 }
 584
 585 void
 586 yp_unbind(char *dom)
 587 {
 588         struct dom_binding *ypb, *ypbp;
 589
 590         ypbp = NULL;
 591         for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
 592                 if (strcmp(dom, ypb->dom_domain) == 0) {
 593                         _yp_unbind(ypb);
 594                         if (ypbp)
 595                                 ypbp->dom_pnext = ypb->dom_pnext;
 596                         else
 597                                 _ypbindlist = ypb->dom_pnext;
 598                         free(ypb);
 599                         return;
 600                 }
 601                 ypbp = ypb;
 602         }
 603         return;
 604 }
 605
 606 int
 607 yp_match(char *indomain, char *inmap, const char *inkey, int inkeylen,
 608     char **outval, int *outvallen)
 609 {
 610         struct dom_binding *ysd;
 611         struct ypresp_val yprv;
 612         struct timeval tv;
 613         struct ypreq_key yprk;
 614         int r;
 615
 616         *outval = NULL;
 617         *outvallen = 0;
 618
 619         /* Sanity check */
 620
 621         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
 622             inmap == NULL || !strlen(inmap) ||
 623             indomain == NULL || !strlen(indomain))
 624                 return (YPERR_BADARGS);
 625
 626         if (_yp_dobind(indomain, &ysd) != 0)
 627                 return(YPERR_DOMAIN);
 628
 629         yprk.domain = indomain;
 630         yprk.map = inmap;
 631         yprk.key.keydat_val = (char *)inkey;
 632         yprk.key.keydat_len = inkeylen;
 633
 634 #ifdef YPMATCHCACHE
 635         if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) {
 636 /*
 637         if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
 638             inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) {
 639 */
 640                 *outvallen = yprv.val.valdat_len;
 641                 *outval = (char *)malloc(*outvallen+1);
 642                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
 643                 (*outval)[*outvallen] = '\0';
 644                 return (0);
 645         }
 646 #endif
 647
 648 again:
 649         if (_yp_dobind(indomain, &ysd) != 0)
 650                 return (YPERR_DOMAIN);
 651
 652         tv.tv_sec = _yplib_timeout;
 653         tv.tv_usec = 0;
 654
 655         bzero((char *)&yprv, sizeof yprv);
 656
 657         r = clnt_call(ysd->dom_client, YPPROC_MATCH,
 658                 xdr_ypreq_key, &yprk, xdr_ypresp_val, &yprv, tv);
 659         if (r != RPC_SUCCESS) {
 660                 clnt_perror(ysd->dom_client, "yp_match: clnt_call");
 661                 _yp_unbind(ysd);
 662                 goto again;
 663         }
 664
 665         if (!(r = ypprot_err(yprv.stat))) {
 666                 *outvallen = yprv.val.valdat_len;
 667                 *outval = (char *)malloc(*outvallen+1);
 668                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
 669                 (*outval)[*outvallen] = '\0';
 670 #ifdef YPMATCHCACHE
 671                 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val);
 672 #endif
 673         }
 674
 675         xdr_free(xdr_ypresp_val, (char *)&yprv);
 676         return (r);
 677 }
 678
 679 int
 680 yp_get_default_domain(char **domp)
 681 {
 682         *domp = NULL;
 683         if (_yp_domain[0] == '\0')
 684                 if (getdomainname(_yp_domain, sizeof _yp_domain))
 685                         return (YPERR_NODOM);
 686         *domp = _yp_domain;
 687         return (0);
 688 }
 689
 690 int
 691 yp_first(char *indomain, char *inmap, char **outkey, int *outkeylen,
 692     char **outval, int *outvallen)
 693 {
 694         struct ypresp_key_val yprkv;
 695         struct ypreq_nokey yprnk;
 696         struct dom_binding *ysd;
 697         struct timeval tv;
 698         int r;
 699
 700         /* Sanity check */
 701
 702         if (indomain == NULL || !strlen(indomain) ||
 703             inmap == NULL || !strlen(inmap))
 704                 return (YPERR_BADARGS);
 705
 706         *outkey = *outval = NULL;
 707         *outkeylen = *outvallen = 0;
 708
 709 again:
 710         if (_yp_dobind(indomain, &ysd) != 0)
 711                 return (YPERR_DOMAIN);
 712
 713         tv.tv_sec = _yplib_timeout;
 714         tv.tv_usec = 0;
 715
 716         yprnk.domain = indomain;
 717         yprnk.map = inmap;
 718         bzero((char *)&yprkv, sizeof yprkv);
 719
 720         r = clnt_call(ysd->dom_client, YPPROC_FIRST,
 721                 xdr_ypreq_nokey, &yprnk, xdr_ypresp_key_val, &yprkv, tv);
 722         if (r != RPC_SUCCESS) {
 723                 clnt_perror(ysd->dom_client, "yp_first: clnt_call");
 724                 _yp_unbind(ysd);
 725                 goto again;
 726         }
 727         if (!(r = ypprot_err(yprkv.stat))) {
 728                 *outkeylen = yprkv.key.keydat_len;
 729                 *outkey = (char *)malloc(*outkeylen+1);
 730                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
 731                 (*outkey)[*outkeylen] = '\0';
 732                 *outvallen = yprkv.val.valdat_len;
 733                 *outval = (char *)malloc(*outvallen+1);
 734                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
 735                 (*outval)[*outvallen] = '\0';
 736         }
 737
 738         xdr_free(xdr_ypresp_key_val, (char *)&yprkv);
 739         return (r);
 740 }
 741
 742 int
 743 yp_next(char *indomain, char *inmap, char *inkey, int inkeylen,
 744     char **outkey, int *outkeylen, char **outval, int *outvallen)
 745 {
 746         struct ypresp_key_val yprkv;
 747         struct ypreq_key yprk;
 748         struct dom_binding *ysd;
 749         struct timeval tv;
 750         int r;
 751
 752         /* Sanity check */
 753
 754         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
 755             inmap == NULL || !strlen(inmap) ||
 756             indomain == NULL || !strlen(indomain))
 757                 return (YPERR_BADARGS);
 758
 759         *outkey = *outval = NULL;
 760         *outkeylen = *outvallen = 0;
 761
 762 again:
 763         if (_yp_dobind(indomain, &ysd) != 0)
 764                 return (YPERR_DOMAIN);
 765
 766         tv.tv_sec = _yplib_timeout;
 767         tv.tv_usec = 0;
 768
 769         yprk.domain = indomain;
 770         yprk.map = inmap;
 771         yprk.key.keydat_val = inkey;
 772         yprk.key.keydat_len = inkeylen;
 773         bzero((char *)&yprkv, sizeof yprkv);
 774
 775         r = clnt_call(ysd->dom_client, YPPROC_NEXT,
 776                 xdr_ypreq_key, &yprk, xdr_ypresp_key_val, &yprkv, tv);
 777         if (r != RPC_SUCCESS) {
 778                 clnt_perror(ysd->dom_client, "yp_next: clnt_call");
 779                 _yp_unbind(ysd);
 780                 goto again;
 781         }
 782         if (!(r = ypprot_err(yprkv.stat))) {
 783                 *outkeylen = yprkv.key.keydat_len;
 784                 *outkey = (char *)malloc(*outkeylen+1);
 785                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
 786                 (*outkey)[*outkeylen] = '\0';
 787                 *outvallen = yprkv.val.valdat_len;
 788                 *outval = (char *)malloc(*outvallen+1);
 789                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
 790                 (*outval)[*outvallen] = '\0';
 791         }
 792
 793         xdr_free(xdr_ypresp_key_val, (char *)&yprkv);
 794         return (r);
 795 }
 796
 797 int
 798 yp_all(char *indomain, char *inmap, struct ypall_callback *incallback)
 799 {
 800         struct ypreq_nokey yprnk;
 801         struct dom_binding *ysd;
 802         struct timeval tv;
 803         struct sockaddr_in clnt_sin;
 804         CLIENT *clnt;
 805         u_long status, savstat;
 806         int clnt_sock;
 807
 808         /* Sanity check */
 809
 810         if (indomain == NULL || !strlen(indomain) ||
 811             inmap == NULL || !strlen(inmap))
 812                 return (YPERR_BADARGS);
 813
 814 again:
 815
 816         if (_yp_dobind(indomain, &ysd) != 0)
 817                 return (YPERR_DOMAIN);
 818
 819         tv.tv_sec = _yplib_timeout;
 820         tv.tv_usec = 0;
 821
 822         /* YPPROC_ALL manufactures its own channel to ypserv using TCP */
 823
 824         clnt_sock = RPC_ANYSOCK;
 825         clnt_sin = ysd->dom_server_addr;
 826         clnt_sin.sin_port = 0;
 827         clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
 828         if (clnt == NULL) {
 829                 printf("clnttcp_create failed\n");
 830                 return (YPERR_PMAP);
 831         }
 832
 833         yprnk.domain = indomain;
 834         yprnk.map = inmap;
 835         ypresp_allfn = incallback->foreach;
 836         ypresp_data = (void *)incallback->data;
 837
 838         if (clnt_call(clnt, YPPROC_ALL,
 839                 xdr_ypreq_nokey, &yprnk,
 840                 xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) {
 841                         clnt_perror(ysd->dom_client, "yp_all: clnt_call");
 842                         clnt_destroy(clnt);
 843                         _yp_unbind(ysd);
 844                         goto again;
 845         }
 846
 847         clnt_destroy(clnt);
 848         savstat = status;
 849         xdr_free(xdr_ypresp_all_seq, (char *)&status);  /* not really needed... */
 850         if (savstat != YP_NOMORE)
 851                 return (ypprot_err(savstat));
 852         return (0);
 853 }
 854
 855 int
 856 yp_order(char *indomain, char *inmap, int *outorder)
 857 {
 858         struct dom_binding *ysd;
 859         struct ypresp_order ypro;
 860         struct ypreq_nokey yprnk;
 861         struct timeval tv;
 862         int r;
 863
 864         /* Sanity check */
 865
 866         if (indomain == NULL || !strlen(indomain) ||
 867             inmap == NULL || !strlen(inmap))
 868                 return (YPERR_BADARGS);
 869
 870 again:
 871         if (_yp_dobind(indomain, &ysd) != 0)
 872                 return (YPERR_DOMAIN);
 873
 874         tv.tv_sec = _yplib_timeout;
 875         tv.tv_usec = 0;
 876
 877         yprnk.domain = indomain;
 878         yprnk.map = inmap;
 879
 880         bzero((char *)(char *)&ypro, sizeof ypro);
 881
 882         r = clnt_call(ysd->dom_client, YPPROC_ORDER,
 883                 xdr_ypreq_nokey, &yprnk, xdr_ypresp_order, &ypro, tv);
 884
 885         /*
 886          * NIS+ in YP compat mode doesn't support the YPPROC_ORDER
 887          * procedure.
 888          */
 889         if (r == RPC_PROCUNAVAIL) {
 890                 return(YPERR_YPERR);
 891         }
 892
 893         if (r != RPC_SUCCESS) {
 894                 clnt_perror(ysd->dom_client, "yp_order: clnt_call");
 895                 _yp_unbind(ysd);
 896                 goto again;
 897         }
 898
 899         if (!(r = ypprot_err(ypro.stat))) {
 900                 *outorder = ypro.ordernum;
 901         }
 902
 903         xdr_free(xdr_ypresp_order, (char *)&ypro);
 904         return (r);
 905 }
 906
 907 int
 908 yp_master(char *indomain, char *inmap, char **outname)
 909 {
 910         struct dom_binding *ysd;
 911         struct ypresp_master yprm;
 912         struct ypreq_nokey yprnk;
 913         struct timeval tv;
 914         int r;
 915
 916         /* Sanity check */
 917
 918         if (indomain == NULL || !strlen(indomain) ||
 919             inmap == NULL || !strlen(inmap))
 920                 return (YPERR_BADARGS);
 921 again:
 922         if (_yp_dobind(indomain, &ysd) != 0)
 923                 return (YPERR_DOMAIN);
 924
 925         tv.tv_sec = _yplib_timeout;
 926         tv.tv_usec = 0;
 927
 928         yprnk.domain = indomain;
 929         yprnk.map = inmap;
 930
 931         bzero((char *)&yprm, sizeof yprm);
 932
 933         r = clnt_call(ysd->dom_client, YPPROC_MASTER,
 934                 xdr_ypreq_nokey, &yprnk, xdr_ypresp_master, &yprm, tv);
 935         if (r != RPC_SUCCESS) {
 936                 clnt_perror(ysd->dom_client, "yp_master: clnt_call");
 937                 _yp_unbind(ysd);
 938                 goto again;
 939         }
 940
 941         if (!(r = ypprot_err(yprm.stat))) {
 942                 *outname = (char *)strdup(yprm.peer);
 943         }
 944
 945         xdr_free(xdr_ypresp_master, (char *)&yprm);
 946         return (r);
 947 }
 948
 949 int
 950 yp_maplist(char *indomain, struct ypmaplist **outmaplist)
 951 {
 952         struct dom_binding *ysd;
 953         struct ypresp_maplist ypml;
 954         struct timeval tv;
 955         int r;
 956
 957         /* Sanity check */
 958
 959         if (indomain == NULL || !strlen(indomain))
 960                 return (YPERR_BADARGS);
 961
 962 again:
 963         if (_yp_dobind(indomain, &ysd) != 0)
 964                 return (YPERR_DOMAIN);
 965
 966         tv.tv_sec = _yplib_timeout;
 967         tv.tv_usec = 0;
 968
 969         bzero((char *)&ypml, sizeof ypml);
 970
 971         r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
 972                 xdr_domainname,(char *)&indomain,xdr_ypresp_maplist,&ypml,tv);
 973         if (r != RPC_SUCCESS) {
 974                 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
 975                 _yp_unbind(ysd);
 976                 goto again;
 977         }
 978         if (!(r = ypprot_err(ypml.stat))) {
 979                 *outmaplist = ypml.maps;
 980         }
 981
 982         /* NO: xdr_free(xdr_ypresp_maplist, &ypml);*/
 983         return (r);
 984 }
 985
 986 char *
 987 yperr_string(int incode)
 988 {
 989         static char err[80];
 990
 991         switch (incode) {
 992         case 0:
 993                 return ("Success");
 994         case YPERR_BADARGS:
 995                 return ("Request arguments bad");
 996         case YPERR_RPC:
 997                 return ("RPC failure");
 998         case YPERR_DOMAIN:
 999                 return ("Can't bind to server which serves this domain");
1000         case YPERR_MAP:
1001                 return ("No such map in server's domain");
1002         case YPERR_KEY:
1003                 return ("No such key in map");
1004         case YPERR_YPERR:
1005                 return ("YP server error");
1006         case YPERR_RESRC:
1007                 return ("Local resource allocation failure");
1008         case YPERR_NOMORE:
1009                 return ("No more records in map database");
1010         case YPERR_PMAP:
1011                 return ("Can't communicate with portmapper");
1012         case YPERR_YPBIND:
1013                 return ("Can't communicate with ypbind");
1014         case YPERR_YPSERV:
1015                 return ("Can't communicate with ypserv");
1016         case YPERR_NODOM:
1017                 return ("Local domain name not set");
1018         case YPERR_BADDB:
1019                 return ("Server data base is bad");
1020         case YPERR_VERS:
1021                 return ("YP server version mismatch - server can't supply service.");
1022         case YPERR_ACCESS:
1023                 return ("Access violation");
1024         case YPERR_BUSY:
1025                 return ("Database is busy");
1026         }
1027         sprintf(err, "YP unknown error %d\n", incode);
1028         return (err);
1029 }
1030
1031 int
1032 ypprot_err(unsigned int incode)
1033 {
1034         switch (incode) {
1035         case YP_TRUE:
1036                 return (0);
1037         case YP_FALSE:
1038                 return (YPERR_YPBIND);
1039         case YP_NOMORE:
1040                 return (YPERR_NOMORE);
1041         case YP_NOMAP:
1042                 return (YPERR_MAP);
1043         case YP_NODOM:
1044                 return (YPERR_DOMAIN);
1045         case YP_NOKEY:
1046                 return (YPERR_KEY);
1047         case YP_BADOP:
1048                 return (YPERR_YPERR);
1049         case YP_BADDB:
1050                 return (YPERR_BADDB);
1051         case YP_YPERR:
1052                 return (YPERR_YPERR);
1053         case YP_BADARGS:
1054                 return (YPERR_BADARGS);
1055         case YP_VERS:
1056                 return (YPERR_VERS);
1057         }
1058         return (YPERR_YPERR);
1059 }
1060
1061 int
1062 _yp_check(char **dom)
1063 {
1064         char *unused;
1065
1066         if (_yp_domain[0]=='\0')
1067                 if (yp_get_default_domain(&unused))
1068                         return (0);
1069
1070         if (dom)
1071                 *dom = _yp_domain;
1072
1073         if (yp_bind(_yp_domain) == 0) {
1074                 yp_unbind(_yp_domain);
1075                 return (1);
1076         }
1077         return (0);
1078 }