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 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  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 <arpa/inet.h>
  41 #include <errno.h>
  42 #include <stdio.h>
  43 #include <string.h>
  44 #include <stdlib.h>
  45 #include <unistd.h>
  46 #include <rpc/rpc.h>
  47 #include <rpc/xdr.h>
  48 #include <rpcsvc/yp.h>
  49 #include "un-namespace.h"
  50 #include "libc_private.h"
  51
  52 /*
  53  * We have to define these here due to clashes between yp_prot.h and
  54  * yp.h.
  55  */
  56
  57 #define YPMATCHCACHE
  58
  59 #ifdef YPMATCHCACHE
  60 struct ypmatch_ent {
  61         char                    *ypc_map;
  62         keydat                  ypc_key;
  63         valdat                  ypc_val;
  64         time_t                  ypc_expire_t;
  65         struct ypmatch_ent      *ypc_next;
  66 };
  67 #define YPLIB_MAXCACHE  5       /* At most 5 entries */
  68 #define YPLIB_EXPIRE    5       /* Expire after 5 seconds */
  69 #endif
  70
  71 struct dom_binding {
  72         struct dom_binding *dom_pnext;
  73         char dom_domain[YPMAXDOMAIN + 1];
  74         struct sockaddr_in dom_server_addr;
  75         u_short dom_server_port;
  76         int dom_socket;
  77         CLIENT *dom_client;
  78         u_short dom_local_port; /* now I finally know what this is for. */
  79         long dom_vers;
  80 #ifdef YPMATCHCACHE
  81         struct ypmatch_ent *cache;
  82         int ypmatch_cachecnt;
  83 #endif
  84 };
  85
  86 #include <rpcsvc/ypclnt.h>
  87
  88 #ifndef BINDINGDIR
  89 #define BINDINGDIR "/var/yp/binding"
  90 #endif
  91 #define MAX_RETRIES 20
  92
  93 extern bool_t xdr_domainname(), xdr_ypbind_resp();
  94 extern bool_t xdr_ypreq_key(), xdr_ypresp_val();
  95 extern bool_t xdr_ypreq_nokey(), xdr_ypresp_key_val();
  96 extern bool_t xdr_ypresp_all(), xdr_ypresp_all_seq();
  97 extern bool_t xdr_ypresp_master();
  98
  99 int (*ypresp_allfn)();
 100 void *ypresp_data;
 101
 102 static void _yp_unbind(struct dom_binding *);
 103 struct dom_binding *_ypbindlist;
 104 static char _yp_domain[MAXHOSTNAMELEN];
 105 int _yplib_timeout = 10;
 106
 107 #ifdef YPMATCHCACHE
 108 static void
 109 ypmatch_cache_delete(struct dom_binding *ypdb, struct ypmatch_ent *prev,
 110     struct ypmatch_ent *cur)
 111 {
 112         if (prev == NULL)
 113                 ypdb->cache = cur->ypc_next;
 114         else
 115                 prev->ypc_next = cur->ypc_next;
 116
 117         free(cur->ypc_map);
 118         free(cur->ypc_key.keydat_val);
 119         free(cur->ypc_val.valdat_val);
 120         free(cur);
 121
 122         ypdb->ypmatch_cachecnt--;
 123
 124         return;
 125 }
 126
 127 static void
 128 ypmatch_cache_flush(struct dom_binding *ypdb)
 129 {
 130         struct ypmatch_ent      *n, *c = ypdb->cache;
 131
 132         while (c != NULL) {
 133                 n = c->ypc_next;
 134                 ypmatch_cache_delete(ypdb, NULL, c);
 135                 c = n;
 136         }
 137
 138         return;
 139 }
 140
 141 static void
 142 ypmatch_cache_expire(struct dom_binding *ypdb)
 143 {
 144         struct ypmatch_ent      *c = ypdb->cache;
 145         struct ypmatch_ent      *n, *p = NULL;
 146         time_t                  t;
 147
 148         time(&t);
 149
 150         while (c != NULL) {
 151                 if (t >= c->ypc_expire_t) {
 152                         n = c->ypc_next;
 153                         ypmatch_cache_delete(ypdb, p, c);
 154                         c = n;
 155                 } else {
 156                         p = c;
 157                         c = c->ypc_next;
 158                 }
 159         }
 160
 161         return;
 162 }
 163
 164 static void
 165 ypmatch_cache_insert(struct dom_binding *ypdb, char *map, 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
 236 ypmatch_cache_lookup(struct dom_binding *ypdb, char *map, keydat *key,
 237     valdat *val)
 238 {
 239         struct ypmatch_ent      *c = ypdb->cache;
 240
 241         ypmatch_cache_expire(ypdb);
 242
 243         for (c = ypdb->cache; c != NULL; c = c->ypc_next) {
 244                 if (strcmp(map, c->ypc_map))
 245                         continue;
 246                 if (key->keydat_len != c->ypc_key.keydat_len)
 247                         continue;
 248                 if (bcmp(key->keydat_val, c->ypc_key.keydat_val,
 249                                 key->keydat_len))
 250                         continue;
 251         }
 252
 253         if (c == NULL)
 254                 return(FALSE);
 255
 256         val->valdat_len = c->ypc_val.valdat_len;
 257         val->valdat_val = c->ypc_val.valdat_val;
 258
 259         return(TRUE);
 260 }
 261 #endif
 262
 263 const char *
 264 ypbinderr_string(int incode)
 265 {
 266         static char err[80];
 267         switch (incode) {
 268         case 0:
 269                 return ("Success");
 270         case YPBIND_ERR_ERR:
 271                 return ("Internal ypbind error");
 272         case YPBIND_ERR_NOSERV:
 273                 return ("Domain not bound");
 274         case YPBIND_ERR_RESC:
 275                 return ("System resource allocation failure");
 276         }
 277         sprintf(err, "Unknown ypbind error: #%d\n", incode);
 278         return (err);
 279 }
 280
 281 int
 282 _yp_dobind(char *dom, struct dom_binding **ypdb)
 283 {
 284         static pid_t pid = -1;
 285         char path[MAXPATHLEN];
 286         struct dom_binding *ysd, *ysd2;
 287         struct ypbind_resp ypbr;
 288         struct timeval tv;
 289         struct sockaddr_in clnt_sin;
 290         int clnt_sock, fd;
 291         pid_t gpid;
 292         CLIENT *client;
 293         int new = 0, r;
 294         int retries = 0;
 295         struct sockaddr_in check;
 296         int checklen = sizeof(struct sockaddr_in);
 297
 298         /* Not allowed; bad doggie. Bad. */
 299         if (strchr(dom, '/') != NULL)
 300                 return(YPERR_BADARGS);
 301
 302         gpid = getpid();
 303         if (!(pid == -1 || pid == gpid)) {
 304                 ysd = _ypbindlist;
 305                 while (ysd) {
 306                         if (ysd->dom_client != NULL)
 307                                 _yp_unbind(ysd);
 308                         ysd2 = ysd->dom_pnext;
 309                         free(ysd);
 310                         ysd = ysd2;
 311                 }
 312                 _ypbindlist = NULL;
 313         }
 314         pid = gpid;
 315
 316         if (ypdb != NULL)
 317                 *ypdb = NULL;
 318
 319         if (dom == NULL || strlen(dom) == 0)
 320                 return (YPERR_BADARGS);
 321
 322         for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
 323                 if (strcmp(dom, ysd->dom_domain) == 0)
 324                         break;
 325
 326
 327         if (ysd == NULL) {
 328                 ysd = (struct dom_binding *)malloc(sizeof *ysd);
 329                 bzero((char *)ysd, sizeof *ysd);
 330                 ysd->dom_socket = -1;
 331                 ysd->dom_vers = 0;
 332                 new = 1;
 333         } else {
 334         /* Check the socket -- may have been hosed by the caller. */
 335                 if (_getsockname(ysd->dom_socket, (struct sockaddr *)&check,
 336                     &checklen) == -1 || check.sin_family != AF_INET ||
 337                     check.sin_port != ysd->dom_local_port) {
 338                 /* Socket became bogus somehow... need to rebind. */
 339                         int save, sock;
 340
 341                         sock = ysd->dom_socket;
 342                         save = _dup(ysd->dom_socket);
 343                         if (ysd->dom_client != NULL)
 344                                 clnt_destroy(ysd->dom_client);
 345                         ysd->dom_vers = 0;
 346                         ysd->dom_client = NULL;
 347                         sock = _dup2(save, sock);
 348                         _close(save);
 349                 }
 350         }
 351
 352 again:
 353         retries++;
 354         if (retries > MAX_RETRIES) {
 355                 if (new)
 356                         free(ysd);
 357                 return(YPERR_YPBIND);
 358         }
 359 #ifdef BINDINGDIR
 360         if (ysd->dom_vers == 0) {
 361                 /*
 362                  * We're trying to make a new binding: zorch the
 363                  * existing handle now (if any).
 364                  */
 365                 if (ysd->dom_client != NULL) {
 366                         clnt_destroy(ysd->dom_client);
 367                         ysd->dom_client = NULL;
 368                         ysd->dom_socket = -1;
 369                 }
 370                 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2);
 371                 if ((fd = _open(path, O_RDONLY)) == -1) {
 372                         /* no binding file, YP is dead. */
 373                         /* Try to bring it back to life. */
 374                         _close(fd);
 375                         goto skipit;
 376                 }
 377                 if (_flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
 378                         struct iovec iov[2];
 379                         struct ypbind_resp ybr;
 380                         u_short ypb_port;
 381
 382                         iov[0].iov_base = (caddr_t)&ypb_port;
 383                         iov[0].iov_len = sizeof ypb_port;
 384                         iov[1].iov_base = (caddr_t)&ybr;
 385                         iov[1].iov_len = sizeof ybr;
 386
 387                         r = _readv(fd, iov, 2);
 388                         if (r != iov[0].iov_len + iov[1].iov_len) {
 389                                 _close(fd);
 390                                 ysd->dom_vers = -1;
 391                                 goto again;
 392                         }
 393
 394                         bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
 395                         ysd->dom_server_addr.sin_family = AF_INET;
 396                         ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
 397                         bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
 398                             &ysd->dom_server_addr.sin_addr.s_addr,
 399                             sizeof(ysd->dom_server_addr.sin_addr.s_addr));
 400                         bcopy(&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
 401                             &ysd->dom_server_addr.sin_port,
 402                             sizeof(ysd->dom_server_addr.sin_port));
 403
 404                         ysd->dom_server_port = ysd->dom_server_addr.sin_port;
 405                         _close(fd);
 406                         goto gotit;
 407                 } else {
 408                         /* no lock on binding file, YP is dead. */
 409                         /* Try to bring it back to life. */
 410                         _close(fd);
 411                         goto skipit;
 412                 }
 413         }
 414 skipit:
 415 #endif
 416         if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
 417                 /*
 418                  * We're trying to make a new binding: zorch the
 419                  * existing handle now (if any).
 420                  */
 421                 if (ysd->dom_client != NULL) {
 422                         clnt_destroy(ysd->dom_client);
 423                         ysd->dom_client = NULL;
 424                         ysd->dom_socket = -1;
 425                 }
 426                 bzero((char *)&clnt_sin, sizeof clnt_sin);
 427                 clnt_sin.sin_family = AF_INET;
 428                 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 429
 430                 clnt_sock = RPC_ANYSOCK;
 431                 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
 432                         0, 0);
 433                 if (client == NULL) {
 434                         /*
 435                          * These conditions indicate ypbind just isn't
 436                          * alive -- we probably don't want to shoot our
 437                          * mouth off in this case; instead generate error
 438                          * messages only for really exotic problems.
 439                          */
 440                         if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED &&
 441                            (rpc_createerr.cf_stat != RPC_SYSTEMERROR &&
 442                            rpc_createerr.cf_error.re_errno == ECONNREFUSED))
 443                                 clnt_pcreateerror("clnttcp_create");
 444                         if (new)
 445                                 free(ysd);
 446                         return (YPERR_YPBIND);
 447                 }
 448
 449                 /*
 450                  * Check the port number -- should be < IPPORT_RESERVED.
 451                  * If not, it's possible someone has registered a bogus
 452                  * ypbind with the portmapper and is trying to trick us.
 453                  */
 454                 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) {
 455                         if (client != NULL)
 456                                 clnt_destroy(client);
 457                         if (new)
 458                                 free(ysd);
 459                         return(YPERR_YPBIND);
 460                 }
 461                 tv.tv_sec = _yplib_timeout/2;
 462                 tv.tv_usec = 0;
 463                 r = clnt_call(client, YPBINDPROC_DOMAIN,
 464                         (xdrproc_t)xdr_domainname, &dom,
 465                         (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
 466                 if (r != RPC_SUCCESS) {
 467                         clnt_destroy(client);
 468                         ysd->dom_vers = -1;
 469                         if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) {
 470                                 if (new)
 471                                         free(ysd);
 472                                 return(YPERR_YPBIND);
 473                         }
 474                         fprintf(stderr,
 475                         "YP: server for domain %s not responding, retrying\n", dom);
 476                         goto again;
 477                 } else {
 478                         if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
 479                                 struct timespec time_to_sleep, time_remaining;
 480
 481                                 clnt_destroy(client);
 482                                 ysd->dom_vers = -1;
 483
 484                                 time_to_sleep.tv_sec = _yplib_timeout/2;
 485                                 time_to_sleep.tv_nsec = 0;
 486                                 _nanosleep(&time_to_sleep,
 487                                     &time_remaining);
 488                                 goto again;
 489                         }
 490                 }
 491                 clnt_destroy(client);
 492
 493                 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
 494                 ysd->dom_server_addr.sin_family = AF_INET;
 495                 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
 496                     &ysd->dom_server_addr.sin_port,
 497                     sizeof(ysd->dom_server_addr.sin_port));
 498                 bcopy(&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
 499                     &ysd->dom_server_addr.sin_addr.s_addr,
 500                     sizeof(ysd->dom_server_addr.sin_addr.s_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(struct dom_binding *ypb)
 560 {
 561         struct sockaddr_in check;
 562         int checklen = sizeof(struct sockaddr_in);
 563
 564         if (ypb->dom_client != NULL) {
 565                 /* Check the socket -- may have been hosed by the caller. */
 566                 if (_getsockname(ypb->dom_socket, (struct sockaddr *)&check,
 567                 &checklen) == -1 || check.sin_family != AF_INET ||
 568                 check.sin_port != ypb->dom_local_port) {
 569                         int save, sock;
 570
 571                         sock = ypb->dom_socket;
 572                         save = _dup(ypb->dom_socket);
 573                         clnt_destroy(ypb->dom_client);
 574                         sock = _dup2(save, sock);
 575                         _close(save);
 576                 } else
 577                         clnt_destroy(ypb->dom_client);
 578         }
 579
 580         ypb->dom_client = NULL;
 581         ypb->dom_socket = -1;
 582         ypb->dom_vers = -1;
 583 #ifdef YPMATCHCACHE
 584         ypmatch_cache_flush(ypb);
 585 #endif
 586 }
 587
 588 int
 589 yp_bind(char *dom)
 590 {
 591         return (_yp_dobind(dom, NULL));
 592 }
 593
 594 void
 595 yp_unbind(char *dom)
 596 {
 597         struct dom_binding *ypb, *ypbp;
 598
 599         ypbp = NULL;
 600         for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
 601                 if (strcmp(dom, ypb->dom_domain) == 0) {
 602                         _yp_unbind(ypb);
 603                         if (ypbp)
 604                                 ypbp->dom_pnext = ypb->dom_pnext;
 605                         else
 606                                 _ypbindlist = ypb->dom_pnext;
 607                         free(ypb);
 608                         return;
 609                 }
 610                 ypbp = ypb;
 611         }
 612         return;
 613 }
 614
 615 int
 616 yp_match(char *indomain, char *inmap, const char *inkey, int inkeylen,
 617     char **outval, int *outvallen)
 618 {
 619         struct dom_binding *ysd;
 620         struct ypresp_val yprv;
 621         struct timeval tv;
 622         struct ypreq_key yprk;
 623         int r;
 624
 625         *outval = NULL;
 626         *outvallen = 0;
 627
 628         /* Sanity check */
 629
 630         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
 631             inmap == NULL || !strlen(inmap) ||
 632             indomain == NULL || !strlen(indomain))
 633                 return (YPERR_BADARGS);
 634
 635         if (_yp_dobind(indomain, &ysd) != 0)
 636                 return(YPERR_DOMAIN);
 637
 638         yprk.domain = indomain;
 639         yprk.map = inmap;
 640         yprk.key.keydat_val = (char *)inkey;
 641         yprk.key.keydat_len = inkeylen;
 642
 643 #ifdef YPMATCHCACHE
 644         if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) {
 645 /*
 646         if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
 647             inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) {
 648 */
 649                 *outvallen = yprv.val.valdat_len;
 650                 *outval = (char *)malloc(*outvallen+1);
 651                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
 652                 (*outval)[*outvallen] = '\0';
 653                 return (0);
 654         }
 655 #endif
 656
 657 again:
 658         if (_yp_dobind(indomain, &ysd) != 0)
 659                 return (YPERR_DOMAIN);
 660
 661         tv.tv_sec = _yplib_timeout;
 662         tv.tv_usec = 0;
 663
 664         bzero((char *)&yprv, sizeof yprv);
 665
 666         r = clnt_call(ysd->dom_client, YPPROC_MATCH,
 667                 (xdrproc_t)xdr_ypreq_key, &yprk,
 668                 (xdrproc_t)xdr_ypresp_val, &yprv, tv);
 669         if (r != RPC_SUCCESS) {
 670                 clnt_perror(ysd->dom_client, "yp_match: clnt_call");
 671                 _yp_unbind(ysd);
 672                 goto again;
 673         }
 674
 675         if (!(r = ypprot_err(yprv.stat))) {
 676                 *outvallen = yprv.val.valdat_len;
 677                 *outval = (char *)malloc(*outvallen+1);
 678                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
 679                 (*outval)[*outvallen] = '\0';
 680 #ifdef YPMATCHCACHE
 681                 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val);
 682 #endif
 683         }
 684
 685         xdr_free((xdrproc_t)xdr_ypresp_val, &yprv);
 686         return (r);
 687 }
 688
 689 int
 690 yp_get_default_domain(char **domp)
 691 {
 692         *domp = NULL;
 693         if (_yp_domain[0] == '\0')
 694                 if (getdomainname(_yp_domain, sizeof _yp_domain))
 695                         return (YPERR_NODOM);
 696         *domp = _yp_domain;
 697         return (0);
 698 }
 699
 700 int
 701 yp_first(char *indomain, char *inmap, char **outkey, int *outkeylen,
 702     char **outval, int *outvallen)
 703 {
 704         struct ypresp_key_val yprkv;
 705         struct ypreq_nokey yprnk;
 706         struct dom_binding *ysd;
 707         struct timeval tv;
 708         int r;
 709
 710         /* Sanity check */
 711
 712         if (indomain == NULL || !strlen(indomain) ||
 713             inmap == NULL || !strlen(inmap))
 714                 return (YPERR_BADARGS);
 715
 716         *outkey = *outval = NULL;
 717         *outkeylen = *outvallen = 0;
 718
 719 again:
 720         if (_yp_dobind(indomain, &ysd) != 0)
 721                 return (YPERR_DOMAIN);
 722
 723         tv.tv_sec = _yplib_timeout;
 724         tv.tv_usec = 0;
 725
 726         yprnk.domain = indomain;
 727         yprnk.map = inmap;
 728         bzero((char *)&yprkv, sizeof yprkv);
 729
 730         r = clnt_call(ysd->dom_client, YPPROC_FIRST,
 731                 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
 732                 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
 733         if (r != RPC_SUCCESS) {
 734                 clnt_perror(ysd->dom_client, "yp_first: clnt_call");
 735                 _yp_unbind(ysd);
 736                 goto again;
 737         }
 738         if (!(r = ypprot_err(yprkv.stat))) {
 739                 *outkeylen = yprkv.key.keydat_len;
 740                 *outkey = (char *)malloc(*outkeylen+1);
 741                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
 742                 (*outkey)[*outkeylen] = '\0';
 743                 *outvallen = yprkv.val.valdat_len;
 744                 *outval = (char *)malloc(*outvallen+1);
 745                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
 746                 (*outval)[*outvallen] = '\0';
 747         }
 748
 749         xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
 750         return (r);
 751 }
 752
 753 int
 754 yp_next(char *indomain, char *inmap, char *inkey, int inkeylen,
 755     char **outkey, int *outkeylen, char **outval, int *outvallen)
 756 {
 757         struct ypresp_key_val yprkv;
 758         struct ypreq_key yprk;
 759         struct dom_binding *ysd;
 760         struct timeval tv;
 761         int r;
 762
 763         /* Sanity check */
 764
 765         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
 766             inmap == NULL || !strlen(inmap) ||
 767             indomain == NULL || !strlen(indomain))
 768                 return (YPERR_BADARGS);
 769
 770         *outkey = *outval = NULL;
 771         *outkeylen = *outvallen = 0;
 772
 773 again:
 774         if (_yp_dobind(indomain, &ysd) != 0)
 775                 return (YPERR_DOMAIN);
 776
 777         tv.tv_sec = _yplib_timeout;
 778         tv.tv_usec = 0;
 779
 780         yprk.domain = indomain;
 781         yprk.map = inmap;
 782         yprk.key.keydat_val = inkey;
 783         yprk.key.keydat_len = inkeylen;
 784         bzero((char *)&yprkv, sizeof yprkv);
 785
 786         r = clnt_call(ysd->dom_client, YPPROC_NEXT,
 787                 (xdrproc_t)xdr_ypreq_key, &yprk,
 788                 (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
 789         if (r != RPC_SUCCESS) {
 790                 clnt_perror(ysd->dom_client, "yp_next: clnt_call");
 791                 _yp_unbind(ysd);
 792                 goto again;
 793         }
 794         if (!(r = ypprot_err(yprkv.stat))) {
 795                 *outkeylen = yprkv.key.keydat_len;
 796                 *outkey = (char *)malloc(*outkeylen+1);
 797                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
 798                 (*outkey)[*outkeylen] = '\0';
 799                 *outvallen = yprkv.val.valdat_len;
 800                 *outval = (char *)malloc(*outvallen+1);
 801                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
 802                 (*outval)[*outvallen] = '\0';
 803         }
 804
 805         xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
 806         return (r);
 807 }
 808
 809 int
 810 yp_all(char *indomain, char *inmap, struct ypall_callback *incallback)
 811 {
 812         struct ypreq_nokey yprnk;
 813         struct dom_binding *ysd;
 814         struct timeval tv;
 815         struct sockaddr_in clnt_sin;
 816         CLIENT *clnt;
 817         u_long status, savstat;
 818         int clnt_sock;
 819
 820         /* Sanity check */
 821
 822         if (indomain == NULL || !strlen(indomain) ||
 823             inmap == NULL || !strlen(inmap))
 824                 return (YPERR_BADARGS);
 825
 826 again:
 827
 828         if (_yp_dobind(indomain, &ysd) != 0)
 829                 return (YPERR_DOMAIN);
 830
 831         tv.tv_sec = _yplib_timeout;
 832         tv.tv_usec = 0;
 833
 834         /* YPPROC_ALL manufactures its own channel to ypserv using TCP */
 835
 836         clnt_sock = RPC_ANYSOCK;
 837         clnt_sin = ysd->dom_server_addr;
 838         clnt_sin.sin_port = 0;
 839         clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
 840         if (clnt == NULL) {
 841                 printf("clnttcp_create failed\n");
 842                 return (YPERR_PMAP);
 843         }
 844
 845         yprnk.domain = indomain;
 846         yprnk.map = inmap;
 847         ypresp_allfn = incallback->foreach;
 848         ypresp_data = (void *)incallback->data;
 849
 850         if (clnt_call(clnt, YPPROC_ALL,
 851                 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
 852                 (xdrproc_t)xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) {
 853                         clnt_perror(ysd->dom_client, "yp_all: clnt_call");
 854                         clnt_destroy(clnt);
 855                         _yp_unbind(ysd);
 856                         goto again;
 857         }
 858
 859         clnt_destroy(clnt);
 860         savstat = status;
 861         xdr_free((xdrproc_t)xdr_ypresp_all_seq, &status);       /* not really needed... */
 862         if (savstat != YP_NOMORE)
 863                 return (ypprot_err(savstat));
 864         return (0);
 865 }
 866
 867 int
 868 yp_order(char *indomain, char *inmap, int *outorder)
 869 {
 870         struct dom_binding *ysd;
 871         struct ypresp_order ypro;
 872         struct ypreq_nokey yprnk;
 873         struct timeval tv;
 874         int r;
 875
 876         /* Sanity check */
 877
 878         if (indomain == NULL || !strlen(indomain) ||
 879             inmap == NULL || !strlen(inmap))
 880                 return (YPERR_BADARGS);
 881
 882 again:
 883         if (_yp_dobind(indomain, &ysd) != 0)
 884                 return (YPERR_DOMAIN);
 885
 886         tv.tv_sec = _yplib_timeout;
 887         tv.tv_usec = 0;
 888
 889         yprnk.domain = indomain;
 890         yprnk.map = inmap;
 891
 892         bzero((char *)(char *)&ypro, sizeof ypro);
 893
 894         r = clnt_call(ysd->dom_client, YPPROC_ORDER,
 895                 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
 896                 (xdrproc_t)xdr_ypresp_order, &ypro, tv);
 897
 898         /*
 899          * NIS+ in YP compat mode doesn't support the YPPROC_ORDER
 900          * procedure.
 901          */
 902         if (r == RPC_PROCUNAVAIL) {
 903                 return(YPERR_YPERR);
 904         }
 905
 906         if (r != RPC_SUCCESS) {
 907                 clnt_perror(ysd->dom_client, "yp_order: clnt_call");
 908                 _yp_unbind(ysd);
 909                 goto again;
 910         }
 911
 912         if (!(r = ypprot_err(ypro.stat))) {
 913                 *outorder = ypro.ordernum;
 914         }
 915
 916         xdr_free((xdrproc_t)xdr_ypresp_order, &ypro);
 917         return (r);
 918 }
 919
 920 int
 921 yp_master(char *indomain, char *inmap, char **outname)
 922 {
 923         struct dom_binding *ysd;
 924         struct ypresp_master yprm;
 925         struct ypreq_nokey yprnk;
 926         struct timeval tv;
 927         int r;
 928
 929         /* Sanity check */
 930
 931         if (indomain == NULL || !strlen(indomain) ||
 932             inmap == NULL || !strlen(inmap))
 933                 return (YPERR_BADARGS);
 934 again:
 935         if (_yp_dobind(indomain, &ysd) != 0)
 936                 return (YPERR_DOMAIN);
 937
 938         tv.tv_sec = _yplib_timeout;
 939         tv.tv_usec = 0;
 940
 941         yprnk.domain = indomain;
 942         yprnk.map = inmap;
 943
 944         bzero((char *)&yprm, sizeof yprm);
 945
 946         r = clnt_call(ysd->dom_client, YPPROC_MASTER,
 947                 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
 948                 (xdrproc_t)xdr_ypresp_master, &yprm, tv);
 949         if (r != RPC_SUCCESS) {
 950                 clnt_perror(ysd->dom_client, "yp_master: clnt_call");
 951                 _yp_unbind(ysd);
 952                 goto again;
 953         }
 954
 955         if (!(r = ypprot_err(yprm.stat))) {
 956                 *outname = (char *)strdup(yprm.peer);
 957         }
 958
 959         xdr_free((xdrproc_t)xdr_ypresp_master, &yprm);
 960         return (r);
 961 }
 962
 963 int
 964 yp_maplist(char *indomain, struct ypmaplist **outmaplist)
 965 {
 966         struct dom_binding *ysd;
 967         struct ypresp_maplist ypml;
 968         struct timeval tv;
 969         int r;
 970
 971         /* Sanity check */
 972
 973         if (indomain == NULL || !strlen(indomain))
 974                 return (YPERR_BADARGS);
 975
 976 again:
 977         if (_yp_dobind(indomain, &ysd) != 0)
 978                 return (YPERR_DOMAIN);
 979
 980         tv.tv_sec = _yplib_timeout;
 981         tv.tv_usec = 0;
 982
 983         bzero((char *)&ypml, sizeof ypml);
 984
 985         r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
 986                 (xdrproc_t)xdr_domainname, &indomain,
 987                 (xdrproc_t)xdr_ypresp_maplist, &ypml,tv);
 988         if (r != RPC_SUCCESS) {
 989                 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
 990                 _yp_unbind(ysd);
 991                 goto again;
 992         }
 993         if (!(r = ypprot_err(ypml.stat))) {
 994                 *outmaplist = ypml.maps;
 995         }
 996
 997         /* NO: xdr_free((xdrproc_t)xdr_ypresp_maplist, &ypml);*/
 998         return (r);
 999 }
1000
1001 const char *
1002 yperr_string(int incode)
1003 {
1004         static char err[80];
1005
1006         switch (incode) {
1007         case 0:
1008                 return ("Success");
1009         case YPERR_BADARGS:
1010                 return ("Request arguments bad");
1011         case YPERR_RPC:
1012                 return ("RPC failure");
1013         case YPERR_DOMAIN:
1014                 return ("Can't bind to server which serves this domain");
1015         case YPERR_MAP:
1016                 return ("No such map in server's domain");
1017         case YPERR_KEY:
1018                 return ("No such key in map");
1019         case YPERR_YPERR:
1020                 return ("YP server error");
1021         case YPERR_RESRC:
1022                 return ("Local resource allocation failure");
1023         case YPERR_NOMORE:
1024                 return ("No more records in map database");
1025         case YPERR_PMAP:
1026                 return ("Can't communicate with portmapper");
1027         case YPERR_YPBIND:
1028                 return ("Can't communicate with ypbind");
1029         case YPERR_YPSERV:
1030                 return ("Can't communicate with ypserv");
1031         case YPERR_NODOM:
1032                 return ("Local domain name not set");
1033         case YPERR_BADDB:
1034                 return ("Server data base is bad");
1035         case YPERR_VERS:
1036                 return ("YP server version mismatch - server can't supply service.");
1037         case YPERR_ACCESS:
1038                 return ("Access violation");
1039         case YPERR_BUSY:
1040                 return ("Database is busy");
1041         }
1042         sprintf(err, "YP unknown error %d\n", incode);
1043         return (err);
1044 }
1045
1046 int
1047 ypprot_err(unsigned int incode)
1048 {
1049         switch (incode) {
1050         case YP_TRUE:
1051                 return (0);
1052         case YP_FALSE:
1053                 return (YPERR_YPBIND);
1054         case YP_NOMORE:
1055                 return (YPERR_NOMORE);
1056         case YP_NOMAP:
1057                 return (YPERR_MAP);
1058         case YP_NODOM:
1059                 return (YPERR_DOMAIN);
1060         case YP_NOKEY:
1061                 return (YPERR_KEY);
1062         case YP_BADOP:
1063                 return (YPERR_YPERR);
1064         case YP_BADDB:
1065                 return (YPERR_BADDB);
1066         case YP_YPERR:
1067                 return (YPERR_YPERR);
1068         case YP_BADARGS:
1069                 return (YPERR_BADARGS);
1070         case YP_VERS:
1071                 return (YPERR_VERS);
1072         }
1073         return (YPERR_YPERR);
1074 }
1075
1076 int
1077 _yp_check(char **dom)
1078 {
1079         char *unused;
1080
1081         if (_yp_domain[0]=='\0')
1082                 if (yp_get_default_domain(&unused))
1083                         return (0);
1084
1085         if (dom)
1086                 *dom = _yp_domain;
1087
1088         if (yp_bind(_yp_domain) == 0) {
1089                 yp_unbind(_yp_domain);
1090                 return (1);
1091         }
1092         return (0);
1093 }