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 1.9 2006/08/03 16:40:46 swildner 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 bool_t  xdr_ypresp_all_seq(XDR *, u_long *);
  51 int     _yp_check(char **);
  52
  53 int (*ypresp_allfn)(unsigned long, char *, int, char *, int, void *);
  54
  55 /*
  56  * We have to define these here due to clashes between yp_prot.h and
  57  * yp.h.
  58  */
  59
  60 #define YPMATCHCACHE
  61
  62 #ifdef YPMATCHCACHE
  63 struct ypmatch_ent {
  64         char                    *ypc_map;
  65         keydat                  ypc_key;
  66         valdat                  ypc_val;
  67         time_t                  ypc_expire_t;
  68         struct ypmatch_ent      *ypc_next;
  69 };
  70 #define YPLIB_MAXCACHE  5       /* At most 5 entries */
  71 #define YPLIB_EXPIRE    5       /* Expire after 5 seconds */
  72 #endif
  73
  74 struct dom_binding {
  75         struct dom_binding *dom_pnext;
  76         char dom_domain[YPMAXDOMAIN + 1];
  77         struct sockaddr_in dom_server_addr;
  78         u_short dom_server_port;
  79         int dom_socket;
  80         CLIENT *dom_client;
  81         u_short dom_local_port; /* now I finally know what this is for. */
  82         long dom_vers;
  83 #ifdef YPMATCHCACHE
  84         struct ypmatch_ent *cache;
  85         int ypmatch_cachecnt;
  86 #endif
  87 };
  88
  89 #include <rpcsvc/yp.h>
  90 #include <rpcsvc/ypclnt.h>
  91
  92 #ifndef BINDINGDIR
  93 #define BINDINGDIR "/var/yp/binding"
  94 #endif
  95 #define MAX_RETRIES 20
  96
  97 void *ypresp_data;
  98
  99 static void _yp_unbind(struct dom_binding *);
 100 struct dom_binding *_ypbindlist;
 101 static char _yp_domain[MAXHOSTNAMELEN];
 102 int _yplib_timeout = 10;
 103
 104 #ifdef YPMATCHCACHE
 105 static void
 106 ypmatch_cache_delete(struct dom_binding *ypdb, struct ypmatch_ent *prev,
 107     struct ypmatch_ent *cur)
 108 {
 109         if (prev == NULL)
 110                 ypdb->cache = cur->ypc_next;
 111         else
 112                 prev->ypc_next = cur->ypc_next;
 113
 114         free(cur->ypc_map);
 115         free(cur->ypc_key.keydat_val);
 116         free(cur->ypc_val.valdat_val);
 117         free(cur);
 118
 119         ypdb->ypmatch_cachecnt--;
 120
 121         return;
 122 }
 123
 124 static void
 125 ypmatch_cache_flush(struct dom_binding *ypdb)
 126 {
 127         struct ypmatch_ent      *n, *c = ypdb->cache;
 128
 129         while (c != NULL) {
 130                 n = c->ypc_next;
 131                 ypmatch_cache_delete(ypdb, NULL, c);
 132                 c = n;
 133         }
 134
 135         return;
 136 }
 137
 138 static void
 139 ypmatch_cache_expire(struct dom_binding *ypdb)
 140 {
 141         struct ypmatch_ent      *c = ypdb->cache;
 142         struct ypmatch_ent      *n, *p = NULL;
 143         time_t                  t;
 144
 145         time(&t);
 146
 147         while (c != NULL) {
 148                 if (t >= c->ypc_expire_t) {
 149                         n = c->ypc_next;
 150                         ypmatch_cache_delete(ypdb, p, c);
 151                         c = n;
 152                 } else {
 153                         p = c;
 154                         c = c->ypc_next;
 155                 }
 156         }
 157
 158         return;
 159 }
 160
 161 static void
 162 ypmatch_cache_insert(struct dom_binding *ypdb, char *map, keydat *key,
 163     valdat *val)
 164 {
 165         struct ypmatch_ent      *new;
 166
 167         /* Do an expire run to maybe open up a slot. */
 168         if (ypdb->ypmatch_cachecnt)
 169                 ypmatch_cache_expire(ypdb);
 170
 171         /*
 172          * If there are no slots free, then force an expire of
 173          * the least recently used entry.
 174          */
 175         if (ypdb->ypmatch_cachecnt >= YPLIB_MAXCACHE) {
 176                 struct ypmatch_ent      *o = NULL, *c = ypdb->cache;
 177                 time_t                  oldest = 0;
 178
 179                 oldest = ~oldest;
 180
 181                 while (c != NULL) {
 182                         if (c->ypc_expire_t < oldest) {
 183                                 oldest = c->ypc_expire_t;
 184                                 o = c;
 185                         }
 186                         c = c->ypc_next;
 187                 }
 188
 189                 if (o == NULL)
 190                         return;
 191                 o->ypc_expire_t = 0;
 192                 ypmatch_cache_expire(ypdb);
 193         }
 194
 195         new = malloc(sizeof(struct ypmatch_ent));
 196         if (new == NULL)
 197                 return;
 198
 199         new->ypc_map = strdup(map);
 200         if (new->ypc_map == NULL) {
 201                 free(new);
 202                 return;
 203         }
 204         new->ypc_key.keydat_val = malloc(key->keydat_len);
 205         if (new->ypc_key.keydat_val == NULL) {
 206                 free(new->ypc_map);
 207                 free(new);
 208                 return;
 209         }
 210         new->ypc_val.valdat_val = malloc(val->valdat_len);
 211         if (new->ypc_val.valdat_val == NULL) {
 212                 free(new->ypc_val.valdat_val);
 213                 free(new->ypc_map);
 214                 free(new);
 215                 return;
 216         }
 217
 218         new->ypc_expire_t = time(NULL) + YPLIB_EXPIRE;
 219         new->ypc_key.keydat_len = key->keydat_len;
 220         new->ypc_val.valdat_len = val->valdat_len;
 221         bcopy(key->keydat_val, new->ypc_key.keydat_val, key->keydat_len);
 222         bcopy(val->valdat_val, new->ypc_val.valdat_val, val->valdat_len);
 223
 224         new->ypc_next = ypdb->cache;
 225         ypdb->cache = new;
 226
 227         ypdb->ypmatch_cachecnt++;
 228
 229         return;
 230 }
 231
 232 static bool_t
 233 ypmatch_cache_lookup(struct dom_binding *ypdb, char *map, keydat *key,
 234     valdat *val)
 235 {
 236         struct ypmatch_ent      *c = ypdb->cache;
 237
 238         ypmatch_cache_expire(ypdb);
 239
 240         for (c = ypdb->cache; c != NULL; c = c->ypc_next) {
 241                 if (strcmp(map, c->ypc_map))
 242                         continue;
 243                 if (key->keydat_len != c->ypc_key.keydat_len)
 244                         continue;
 245                 if (bcmp(key->keydat_val, c->ypc_key.keydat_val,
 246                                 key->keydat_len))
 247                         continue;
 248         }
 249
 250         if (c == NULL)
 251                 return(FALSE);
 252
 253         val->valdat_len = c->ypc_val.valdat_len;
 254         val->valdat_val = c->ypc_val.valdat_val;
 255
 256         return(TRUE);
 257 }
 258 #endif
 259
 260 char *
 261 ypbinderr_string(int incode)
 262 {
 263         const char *errstr;
 264         static char err[80];
 265         switch (incode) {
 266         case 0:
 267                 errstr = "Success";
 268                 break;
 269         case YPBIND_ERR_ERR:
 270                 errstr = "Internal ypbind error";
 271                 break;
 272         case YPBIND_ERR_NOSERV:
 273                 errstr = "Domain not bound";
 274                 break;
 275         case YPBIND_ERR_RESC:
 276                 errstr = "System resource allocation failure";
 277                 break;
 278         default:
 279                 errstr = NULL;
 280                 break;
 281         }
 282         if (errstr != NULL)
 283                 strlcpy(err, errstr, sizeof(err));
 284         else
 285                 snprintf(err, sizeof(err), "Unknown ypbind error: #%d\n", incode);
 286         return (err);
 287 }
 288
 289 int
 290 _yp_dobind(const char *dom, struct dom_binding **ypdb)
 291 {
 292         static pid_t pid = -1;
 293         char path[MAXPATHLEN];
 294         struct dom_binding *ysd, *ysd2;
 295         struct ypbind_resp ypbr;
 296         struct timeval tv;
 297         struct sockaddr_in clnt_sin;
 298         int clnt_sock, fd;
 299         pid_t gpid;
 300         CLIENT *client;
 301         int new = 0;
 302         ssize_t r;
 303         int retries = 0;
 304         struct sockaddr_in check;
 305         int checklen = sizeof(struct sockaddr_in);
 306
 307         /* Not allowed; bad doggie. Bad. */
 308         if (strchr(dom, '/') != NULL)
 309                 return(YPERR_BADARGS);
 310
 311         gpid = getpid();
 312         if (!(pid == -1 || pid == gpid)) {
 313                 ysd = _ypbindlist;
 314                 while (ysd) {
 315                         if (ysd->dom_client != NULL)
 316                                 _yp_unbind(ysd);
 317                         ysd2 = ysd->dom_pnext;
 318                         free(ysd);
 319                         ysd = ysd2;
 320                 }
 321                 _ypbindlist = NULL;
 322         }
 323         pid = gpid;
 324
 325         if (ypdb != NULL)
 326                 *ypdb = NULL;
 327
 328         if (dom == NULL || strlen(dom) == 0)
 329                 return (YPERR_BADARGS);
 330
 331         for (ysd = _ypbindlist; ysd; ysd = ysd->dom_pnext)
 332                 if (strcmp(dom, ysd->dom_domain) == 0)
 333                         break;
 334
 335
 336         if (ysd == NULL) {
 337                 ysd = (struct dom_binding *)malloc(sizeof *ysd);
 338                 bzero((char *)ysd, sizeof *ysd);
 339                 ysd->dom_socket = -1;
 340                 ysd->dom_vers = 0;
 341                 new = 1;
 342         } else {
 343         /* Check the socket -- may have been hosed by the caller. */
 344                 if (_getsockname(ysd->dom_socket, (struct sockaddr *)&check,
 345                     &checklen) == -1 || check.sin_family != AF_INET ||
 346                     check.sin_port != ysd->dom_local_port) {
 347                 /* Socket became bogus somehow... need to rebind. */
 348                         int save, sock;
 349
 350                         sock = ysd->dom_socket;
 351                         save = _dup(ysd->dom_socket);
 352                         if (ysd->dom_client != NULL)
 353                                 clnt_destroy(ysd->dom_client);
 354                         ysd->dom_vers = 0;
 355                         ysd->dom_client = NULL;
 356                         sock = _dup2(save, sock);
 357                         _close(save);
 358                 }
 359         }
 360
 361 again:
 362         retries++;
 363         if (retries > MAX_RETRIES) {
 364                 if (new)
 365                         free(ysd);
 366                 return(YPERR_YPBIND);
 367         }
 368 #ifdef BINDINGDIR
 369         if (ysd->dom_vers == 0) {
 370                 /*
 371                  * We're trying to make a new binding: zorch the
 372                  * existing handle now (if any).
 373                  */
 374                 if (ysd->dom_client != NULL) {
 375                         clnt_destroy(ysd->dom_client);
 376                         ysd->dom_client = NULL;
 377                         ysd->dom_socket = -1;
 378                 }
 379                 snprintf(path, sizeof(path), "%s/%s.%d", BINDINGDIR, dom, 2);
 380                 if ((fd = _open(path, O_RDONLY)) == -1) {
 381                         /* no binding file, YP is dead. */
 382                         /* Try to bring it back to life. */
 383                         _close(fd);
 384                         goto skipit;
 385                 }
 386                 if (_flock(fd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) {
 387                         struct iovec iov[2];
 388                         struct ypbind_resp ybr;
 389                         u_short ypb_port;
 390
 391                         iov[0].iov_base = (caddr_t)&ypb_port;
 392                         iov[0].iov_len = sizeof ypb_port;
 393                         iov[1].iov_base = (caddr_t)&ybr;
 394                         iov[1].iov_len = sizeof ybr;
 395
 396                         r = _readv(fd, iov, 2);
 397                         if (r != (ssize_t)(iov[0].iov_len + iov[1].iov_len)) {
 398                                 _close(fd);
 399                                 ysd->dom_vers = -1;
 400                                 goto again;
 401                         }
 402
 403                         bzero(&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
 404                         ysd->dom_server_addr.sin_family = AF_INET;
 405                         ysd->dom_server_addr.sin_len = sizeof(struct sockaddr_in);
 406                         ysd->dom_server_addr.sin_addr.s_addr =
 407                             *(u_long *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
 408                         ysd->dom_server_addr.sin_port =
 409                             *(u_short *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 410
 411                         ysd->dom_server_port = ysd->dom_server_addr.sin_port;
 412                         _close(fd);
 413                         goto gotit;
 414                 } else {
 415                         /* no lock on binding file, YP is dead. */
 416                         /* Try to bring it back to life. */
 417                         _close(fd);
 418                         goto skipit;
 419                 }
 420         }
 421 skipit:
 422 #endif
 423         if (ysd->dom_vers == -1 || ysd->dom_vers == 0) {
 424                 /*
 425                  * We're trying to make a new binding: zorch the
 426                  * existing handle now (if any).
 427                  */
 428                 if (ysd->dom_client != NULL) {
 429                         clnt_destroy(ysd->dom_client);
 430                         ysd->dom_client = NULL;
 431                         ysd->dom_socket = -1;
 432                 }
 433                 bzero((char *)&clnt_sin, sizeof clnt_sin);
 434                 clnt_sin.sin_family = AF_INET;
 435                 clnt_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 436
 437                 clnt_sock = RPC_ANYSOCK;
 438                 client = clnttcp_create(&clnt_sin, YPBINDPROG, YPBINDVERS, &clnt_sock,
 439                         0, 0);
 440                 if (client == NULL) {
 441                         /*
 442                          * These conditions indicate ypbind just isn't
 443                          * alive -- we probably don't want to shoot our
 444                          * mouth off in this case; instead generate error
 445                          * messages only for really exotic problems.
 446                          */
 447                         if (rpc_createerr.cf_stat != RPC_PROGNOTREGISTERED &&
 448                            (rpc_createerr.cf_stat != RPC_SYSTEMERROR &&
 449                            rpc_createerr.cf_error.re_errno == ECONNREFUSED))
 450                                 clnt_pcreateerror("clnttcp_create");
 451                         if (new)
 452                                 free(ysd);
 453                         return (YPERR_YPBIND);
 454                 }
 455
 456                 /*
 457                  * Check the port number -- should be < IPPORT_RESERVED.
 458                  * If not, it's possible someone has registered a bogus
 459                  * ypbind with the portmapper and is trying to trick us.
 460                  */
 461                 if (ntohs(clnt_sin.sin_port) >= IPPORT_RESERVED) {
 462                         if (client != NULL)
 463                                 clnt_destroy(client);
 464                         if (new)
 465                                 free(ysd);
 466                         return(YPERR_YPBIND);
 467                 }
 468                 tv.tv_sec = _yplib_timeout/2;
 469                 tv.tv_usec = 0;
 470                 r = clnt_call(client, YPBINDPROC_DOMAIN,
 471                     (xdrproc_t)xdr_domainname, (char *)&dom,
 472                     (xdrproc_t)xdr_ypbind_resp, &ypbr, tv);
 473                 if (r != RPC_SUCCESS) {
 474                         clnt_destroy(client);
 475                         ysd->dom_vers = -1;
 476                         if (r == RPC_PROGUNAVAIL || r == RPC_PROCUNAVAIL) {
 477                                 if (new)
 478                                         free(ysd);
 479                                 return(YPERR_YPBIND);
 480                         }
 481                         fprintf(stderr,
 482                         "YP: server for domain %s not responding, retrying\n", dom);
 483                         goto again;
 484                 } else {
 485                         if (ypbr.ypbind_status != YPBIND_SUCC_VAL) {
 486                                 struct timespec time_to_sleep, time_remaining;
 487
 488                                 clnt_destroy(client);
 489                                 ysd->dom_vers = -1;
 490
 491                                 time_to_sleep.tv_sec = _yplib_timeout/2;
 492                                 time_to_sleep.tv_nsec = 0;
 493                                 _nanosleep(&time_to_sleep,
 494                                     &time_remaining);
 495                                 goto again;
 496                         }
 497                 }
 498                 clnt_destroy(client);
 499
 500                 bzero((char *)&ysd->dom_server_addr, sizeof ysd->dom_server_addr);
 501                 ysd->dom_server_addr.sin_family = AF_INET;
 502                 ysd->dom_server_addr.sin_port =
 503                         *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 504                 ysd->dom_server_addr.sin_addr.s_addr =
 505                         *(u_long *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr;
 506
 507                 /*
 508                  * We could do a reserved port check here too, but this
 509                  * could pose compatibility problems. The local ypbind is
 510                  * supposed to decide whether or not to trust yp servers
 511                  * on insecure ports. For now, we trust its judgement.
 512                  */
 513                 ysd->dom_server_port =
 514                         *(u_short *)&ypbr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port;
 515 gotit:
 516                 ysd->dom_vers = YPVERS;
 517                 strlcpy(ysd->dom_domain, dom, sizeof(ysd->dom_domain));
 518         }
 519
 520         /* Don't rebuild the connection to the server unless we have to. */
 521         if (ysd->dom_client == NULL) {
 522                 tv.tv_sec = _yplib_timeout/2;
 523                 tv.tv_usec = 0;
 524                 ysd->dom_socket = RPC_ANYSOCK;
 525                 ysd->dom_client = clntudp_bufcreate(&ysd->dom_server_addr,
 526                         YPPROG, YPVERS, tv, &ysd->dom_socket, 1280, 2304);
 527                 if (ysd->dom_client == NULL) {
 528                         clnt_pcreateerror("clntudp_create");
 529                         ysd->dom_vers = -1;
 530                         goto again;
 531                 }
 532                 if (_fcntl(ysd->dom_socket, F_SETFD, 1) == -1)
 533                         perror("fcntl: F_SETFD");
 534                 /*
 535                  * We want a port number associated with this socket
 536                  * so that we can check its authenticity later.
 537                  */
 538                 checklen = sizeof(struct sockaddr_in);
 539                 bzero((char *)&check, checklen);
 540                 _bind(ysd->dom_socket, (struct sockaddr *)&check, checklen);
 541                 check.sin_family = AF_INET;
 542                 if (!_getsockname(ysd->dom_socket,
 543                     (struct sockaddr *)&check, &checklen)) {
 544                         ysd->dom_local_port = check.sin_port;
 545                 } else {
 546                         clnt_destroy(ysd->dom_client);
 547                         if (new)
 548                                 free(ysd);
 549                         return(YPERR_YPBIND);
 550                 }
 551         }
 552
 553         if (new) {
 554                 ysd->dom_pnext = _ypbindlist;
 555                 _ypbindlist = ysd;
 556         }
 557
 558         if (ypdb != NULL)
 559                 *ypdb = ysd;
 560         return (0);
 561 }
 562
 563 static void
 564 _yp_unbind(struct dom_binding *ypb)
 565 {
 566         struct sockaddr_in check;
 567         int checklen = sizeof(struct sockaddr_in);
 568
 569         if (ypb->dom_client != NULL) {
 570                 /* Check the socket -- may have been hosed by the caller. */
 571                 if (_getsockname(ypb->dom_socket, (struct sockaddr *)&check,
 572                 &checklen) == -1 || check.sin_family != AF_INET ||
 573                 check.sin_port != ypb->dom_local_port) {
 574                         int save, sock;
 575
 576                         sock = ypb->dom_socket;
 577                         save = _dup(ypb->dom_socket);
 578                         clnt_destroy(ypb->dom_client);
 579                         sock = _dup2(save, sock);
 580                         _close(save);
 581                 } else
 582                         clnt_destroy(ypb->dom_client);
 583         }
 584
 585         ypb->dom_client = NULL;
 586         ypb->dom_socket = -1;
 587         ypb->dom_vers = -1;
 588 #ifdef YPMATCHCACHE
 589         ypmatch_cache_flush(ypb);
 590 #endif
 591 }
 592
 593 int
 594 yp_bind(char *dom)
 595 {
 596         return (_yp_dobind(dom, NULL));
 597 }
 598
 599 void
 600 yp_unbind(char *dom)
 601 {
 602         struct dom_binding *ypb, *ypbp;
 603
 604         ypbp = NULL;
 605         for (ypb = _ypbindlist; ypb; ypb = ypb->dom_pnext) {
 606                 if (strcmp(dom, ypb->dom_domain) == 0) {
 607                         _yp_unbind(ypb);
 608                         if (ypbp)
 609                                 ypbp->dom_pnext = ypb->dom_pnext;
 610                         else
 611                                 _ypbindlist = ypb->dom_pnext;
 612                         free(ypb);
 613                         return;
 614                 }
 615                 ypbp = ypb;
 616         }
 617         return;
 618 }
 619
 620 int
 621 yp_match(char *indomain, char *inmap, const char *inkey, int inkeylen,
 622     char **outval, int *outvallen)
 623 {
 624         struct dom_binding *ysd;
 625         struct ypresp_val yprv;
 626         struct timeval tv;
 627         struct ypreq_key yprk;
 628         int r;
 629
 630         *outval = NULL;
 631         *outvallen = 0;
 632
 633         /* Sanity check */
 634
 635         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
 636             inmap == NULL || !strlen(inmap) ||
 637             indomain == NULL || !strlen(indomain))
 638                 return (YPERR_BADARGS);
 639
 640         if (_yp_dobind(indomain, &ysd) != 0)
 641                 return(YPERR_DOMAIN);
 642
 643         yprk.domain = indomain;
 644         yprk.map = inmap;
 645         yprk.key.keydat_val = (char *)inkey;
 646         yprk.key.keydat_len = inkeylen;
 647
 648 #ifdef YPMATCHCACHE
 649         if (ypmatch_cache_lookup(ysd, yprk.map, &yprk.key, &yprv.val) == TRUE) {
 650 /*
 651         if (!strcmp(_yp_domain, indomain) && ypmatch_find(inmap, inkey,
 652             inkeylen, &yprv.val.valdat_val, &yprv.val.valdat_len)) {
 653 */
 654                 *outvallen = yprv.val.valdat_len;
 655                 *outval = (char *)malloc(*outvallen+1);
 656                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
 657                 (*outval)[*outvallen] = '\0';
 658                 return (0);
 659         }
 660 #endif
 661
 662 again:
 663         if (_yp_dobind(indomain, &ysd) != 0)
 664                 return (YPERR_DOMAIN);
 665
 666         tv.tv_sec = _yplib_timeout;
 667         tv.tv_usec = 0;
 668
 669         bzero((char *)&yprv, sizeof yprv);
 670
 671         r = clnt_call(ysd->dom_client, YPPROC_MATCH,
 672             (xdrproc_t)xdr_ypreq_key, &yprk,
 673             (xdrproc_t)xdr_ypresp_val, &yprv, tv);
 674         if (r != RPC_SUCCESS) {
 675                 clnt_perror(ysd->dom_client, "yp_match: clnt_call");
 676                 _yp_unbind(ysd);
 677                 goto again;
 678         }
 679
 680         if (!(r = ypprot_err(yprv.stat))) {
 681                 *outvallen = yprv.val.valdat_len;
 682                 *outval = (char *)malloc(*outvallen+1);
 683                 bcopy(yprv.val.valdat_val, *outval, *outvallen);
 684                 (*outval)[*outvallen] = '\0';
 685 #ifdef YPMATCHCACHE
 686                 ypmatch_cache_insert(ysd, yprk.map, &yprk.key, &yprv.val);
 687 #endif
 688         }
 689
 690         xdr_free((xdrproc_t)xdr_ypresp_val, &yprv);
 691         return (r);
 692 }
 693
 694 int
 695 yp_get_default_domain(char **domp)
 696 {
 697         *domp = NULL;
 698         if (_yp_domain[0] == '\0')
 699                 if (getdomainname(_yp_domain, sizeof _yp_domain))
 700                         return (YPERR_NODOM);
 701         *domp = _yp_domain;
 702         return (0);
 703 }
 704
 705 int
 706 yp_first(char *indomain, char *inmap, char **outkey, size_t *outkeylen,
 707     char **outval, size_t *outvallen)
 708 {
 709         struct ypresp_key_val yprkv;
 710         struct ypreq_nokey yprnk;
 711         struct dom_binding *ysd;
 712         struct timeval tv;
 713         int r;
 714
 715         /* Sanity check */
 716
 717         if (indomain == NULL || !strlen(indomain) ||
 718             inmap == NULL || !strlen(inmap))
 719                 return (YPERR_BADARGS);
 720
 721         *outkey = *outval = NULL;
 722         *outkeylen = *outvallen = 0;
 723
 724 again:
 725         if (_yp_dobind(indomain, &ysd) != 0)
 726                 return (YPERR_DOMAIN);
 727
 728         tv.tv_sec = _yplib_timeout;
 729         tv.tv_usec = 0;
 730
 731         yprnk.domain = indomain;
 732         yprnk.map = inmap;
 733         bzero((char *)&yprkv, sizeof yprkv);
 734
 735         r = clnt_call(ysd->dom_client, YPPROC_FIRST,
 736             (xdrproc_t)xdr_ypreq_nokey, &yprnk,
 737             (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
 738         if (r != RPC_SUCCESS) {
 739                 clnt_perror(ysd->dom_client, "yp_first: clnt_call");
 740                 _yp_unbind(ysd);
 741                 goto again;
 742         }
 743         if (!(r = ypprot_err(yprkv.stat))) {
 744                 *outkeylen = yprkv.key.keydat_len;
 745                 *outkey = (char *)malloc(*outkeylen+1);
 746                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
 747                 (*outkey)[*outkeylen] = '\0';
 748                 *outvallen = yprkv.val.valdat_len;
 749                 *outval = (char *)malloc(*outvallen+1);
 750                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
 751                 (*outval)[*outvallen] = '\0';
 752         }
 753
 754         xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
 755         return (r);
 756 }
 757
 758 int
 759 yp_next(char *indomain, char *inmap, char *inkey, size_t inkeylen,
 760     char **outkey, size_t *outkeylen, char **outval, size_t *outvallen)
 761 {
 762         struct ypresp_key_val yprkv;
 763         struct ypreq_key yprk;
 764         struct dom_binding *ysd;
 765         struct timeval tv;
 766         int r;
 767
 768         /* Sanity check */
 769
 770         if (inkey == NULL || !strlen(inkey) || inkeylen <= 0 ||
 771             inmap == NULL || !strlen(inmap) ||
 772             indomain == NULL || !strlen(indomain))
 773                 return (YPERR_BADARGS);
 774
 775         *outkey = *outval = NULL;
 776         *outkeylen = *outvallen = 0;
 777
 778 again:
 779         if (_yp_dobind(indomain, &ysd) != 0)
 780                 return (YPERR_DOMAIN);
 781
 782         tv.tv_sec = _yplib_timeout;
 783         tv.tv_usec = 0;
 784
 785         yprk.domain = indomain;
 786         yprk.map = inmap;
 787         yprk.key.keydat_val = inkey;
 788         yprk.key.keydat_len = inkeylen;
 789         bzero((char *)&yprkv, sizeof yprkv);
 790
 791         r = clnt_call(ysd->dom_client, YPPROC_NEXT,
 792             (xdrproc_t)xdr_ypreq_key, &yprk,
 793             (xdrproc_t)xdr_ypresp_key_val, &yprkv, tv);
 794         if (r != RPC_SUCCESS) {
 795                 clnt_perror(ysd->dom_client, "yp_next: clnt_call");
 796                 _yp_unbind(ysd);
 797                 goto again;
 798         }
 799         if (!(r = ypprot_err(yprkv.stat))) {
 800                 *outkeylen = yprkv.key.keydat_len;
 801                 *outkey = (char *)malloc(*outkeylen+1);
 802                 bcopy(yprkv.key.keydat_val, *outkey, *outkeylen);
 803                 (*outkey)[*outkeylen] = '\0';
 804                 *outvallen = yprkv.val.valdat_len;
 805                 *outval = (char *)malloc(*outvallen+1);
 806                 bcopy(yprkv.val.valdat_val, *outval, *outvallen);
 807                 (*outval)[*outvallen] = '\0';
 808         }
 809
 810         xdr_free((xdrproc_t)xdr_ypresp_key_val, &yprkv);
 811         return (r);
 812 }
 813
 814 int
 815 yp_all(char *indomain, char *inmap, struct ypall_callback *incallback)
 816 {
 817         struct ypreq_nokey yprnk;
 818         struct dom_binding *ysd;
 819         struct timeval tv;
 820         struct sockaddr_in clnt_sin;
 821         CLIENT *clnt;
 822         u_long status, savstat;
 823         int clnt_sock;
 824
 825         /* Sanity check */
 826
 827         if (indomain == NULL || !strlen(indomain) ||
 828             inmap == NULL || !strlen(inmap))
 829                 return (YPERR_BADARGS);
 830
 831 again:
 832
 833         if (_yp_dobind(indomain, &ysd) != 0)
 834                 return (YPERR_DOMAIN);
 835
 836         tv.tv_sec = _yplib_timeout;
 837         tv.tv_usec = 0;
 838
 839         /* YPPROC_ALL manufactures its own channel to ypserv using TCP */
 840
 841         clnt_sock = RPC_ANYSOCK;
 842         clnt_sin = ysd->dom_server_addr;
 843         clnt_sin.sin_port = 0;
 844         clnt = clnttcp_create(&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
 845         if (clnt == NULL) {
 846                 printf("clnttcp_create failed\n");
 847                 return (YPERR_PMAP);
 848         }
 849
 850         yprnk.domain = indomain;
 851         yprnk.map = inmap;
 852         ypresp_allfn = incallback->foreach;
 853         ypresp_data = (void *)incallback->data;
 854
 855         if (clnt_call(clnt, YPPROC_ALL,
 856                 (xdrproc_t)xdr_ypreq_nokey, &yprnk,
 857                 (xdrproc_t)xdr_ypresp_all_seq, &status, tv) != RPC_SUCCESS) {
 858                         clnt_perror(ysd->dom_client, "yp_all: clnt_call");
 859                         clnt_destroy(clnt);
 860                         _yp_unbind(ysd);
 861                         goto again;
 862         }
 863
 864         clnt_destroy(clnt);
 865         savstat = status;
 866         xdr_free((xdrproc_t)xdr_ypresp_all_seq, &status);       /* not really needed... */
 867         if (savstat != YP_NOMORE)
 868                 return (ypprot_err(savstat));
 869         return (0);
 870 }
 871
 872 int
 873 yp_order(char *indomain, char *inmap, int *outorder)
 874 {
 875         struct dom_binding *ysd;
 876         struct ypresp_order ypro;
 877         struct ypreq_nokey yprnk;
 878         struct timeval tv;
 879         int r;
 880
 881         /* Sanity check */
 882
 883         if (indomain == NULL || !strlen(indomain) ||
 884             inmap == NULL || !strlen(inmap))
 885                 return (YPERR_BADARGS);
 886
 887 again:
 888         if (_yp_dobind(indomain, &ysd) != 0)
 889                 return (YPERR_DOMAIN);
 890
 891         tv.tv_sec = _yplib_timeout;
 892         tv.tv_usec = 0;
 893
 894         yprnk.domain = indomain;
 895         yprnk.map = inmap;
 896
 897         bzero((char *)(char *)&ypro, sizeof ypro);
 898
 899         r = clnt_call(ysd->dom_client, YPPROC_ORDER,
 900             (xdrproc_t)xdr_ypreq_nokey, &yprnk,
 901             (xdrproc_t)xdr_ypresp_order, &ypro, tv);
 902
 903         /*
 904          * NIS+ in YP compat mode doesn't support the YPPROC_ORDER
 905          * procedure.
 906          */
 907         if (r == RPC_PROCUNAVAIL) {
 908                 return(YPERR_YPERR);
 909         }
 910
 911         if (r != RPC_SUCCESS) {
 912                 clnt_perror(ysd->dom_client, "yp_order: clnt_call");
 913                 _yp_unbind(ysd);
 914                 goto again;
 915         }
 916
 917         if (!(r = ypprot_err(ypro.stat))) {
 918                 *outorder = ypro.ordernum;
 919         }
 920
 921         xdr_free((xdrproc_t)xdr_ypresp_order, &ypro);
 922         return (r);
 923 }
 924
 925 int
 926 yp_master(char *indomain, char *inmap, char **outname)
 927 {
 928         struct dom_binding *ysd;
 929         struct ypresp_master yprm;
 930         struct ypreq_nokey yprnk;
 931         struct timeval tv;
 932         int r;
 933
 934         /* Sanity check */
 935
 936         if (indomain == NULL || !strlen(indomain) ||
 937             inmap == NULL || !strlen(inmap))
 938                 return (YPERR_BADARGS);
 939 again:
 940         if (_yp_dobind(indomain, &ysd) != 0)
 941                 return (YPERR_DOMAIN);
 942
 943         tv.tv_sec = _yplib_timeout;
 944         tv.tv_usec = 0;
 945
 946         yprnk.domain = indomain;
 947         yprnk.map = inmap;
 948
 949         bzero((char *)&yprm, sizeof yprm);
 950
 951         r = clnt_call(ysd->dom_client, YPPROC_MASTER,
 952             (xdrproc_t)xdr_ypreq_nokey, &yprnk,
 953             (xdrproc_t)xdr_ypresp_master, &yprm, tv);
 954         if (r != RPC_SUCCESS) {
 955                 clnt_perror(ysd->dom_client, "yp_master: clnt_call");
 956                 _yp_unbind(ysd);
 957                 goto again;
 958         }
 959
 960         if (!(r = ypprot_err(yprm.stat))) {
 961                 *outname = (char *)strdup(yprm.peer);
 962         }
 963
 964         xdr_free((xdrproc_t)xdr_ypresp_master, &yprm);
 965         return (r);
 966 }
 967
 968 int
 969 yp_maplist(char *indomain, struct ypmaplist **outmaplist)
 970 {
 971         struct dom_binding *ysd;
 972         struct ypresp_maplist ypml;
 973         struct timeval tv;
 974         int r;
 975
 976         /* Sanity check */
 977
 978         if (indomain == NULL || !strlen(indomain))
 979                 return (YPERR_BADARGS);
 980
 981 again:
 982         if (_yp_dobind(indomain, &ysd) != 0)
 983                 return (YPERR_DOMAIN);
 984
 985         tv.tv_sec = _yplib_timeout;
 986         tv.tv_usec = 0;
 987
 988         bzero((char *)&ypml, sizeof ypml);
 989
 990         r = clnt_call(ysd->dom_client, YPPROC_MAPLIST,
 991             (xdrproc_t)xdr_domainname, (char *)&indomain,
 992             (xdrproc_t)xdr_ypresp_maplist, &ypml, tv);
 993         if (r != RPC_SUCCESS) {
 994                 clnt_perror(ysd->dom_client, "yp_maplist: clnt_call");
 995                 _yp_unbind(ysd);
 996                 goto again;
 997         }
 998         if (!(r = ypprot_err(ypml.stat))) {
 999                 *outmaplist = ypml.maps;
1000         }
1001
1002         /* NO: xdr_free(xdr_ypresp_maplist, &ypml);*/
1003         return (r);
1004 }
1005
1006 char *
1007 yperr_string(int incode)
1008 {
1009         const char *errstr;
1010         static char err[80];
1011
1012         switch (incode) {
1013         case 0:
1014                 errstr = "Success";
1015                 break;
1016         case YPERR_BADARGS:
1017                 errstr = "Request arguments bad";
1018                 break;
1019         case YPERR_RPC:
1020                 errstr = "RPC failure";
1021                 break;
1022         case YPERR_DOMAIN:
1023                 errstr = "Can't bind to server which serves this domain";
1024                 break;
1025         case YPERR_MAP:
1026                 errstr = "No such map in server's domain";
1027                 break;
1028         case YPERR_KEY:
1029                 errstr = "No such key in map";
1030                 break;
1031         case YPERR_YPERR:
1032                 errstr = "YP server error";
1033                 break;
1034         case YPERR_RESRC:
1035                 errstr = "Local resource allocation failure";
1036                 break;
1037         case YPERR_NOMORE:
1038                 errstr = "No more records in map database";
1039                 break;
1040         case YPERR_PMAP:
1041                 errstr = "Can't communicate with portmapper";
1042                 break;
1043         case YPERR_YPBIND:
1044                 errstr = "Can't communicate with ypbind";
1045                 break;
1046         case YPERR_YPSERV:
1047                 errstr = "Can't communicate with ypserv";
1048                 break;
1049         case YPERR_NODOM:
1050                 errstr = "Local domain name not set";
1051                 break;
1052         case YPERR_BADDB:
1053                 errstr = "Server data base is bad";
1054                 break;
1055         case YPERR_VERS:
1056                 errstr = "YP server version mismatch - server can't supply service.";
1057                 break;
1058         case YPERR_ACCESS:
1059                 errstr = "Access violation";
1060                 break;
1061         case YPERR_BUSY:
1062                 errstr = "Database is busy";
1063                 break;
1064         default:
1065                 errstr = NULL;
1066                 break;
1067         }
1068         if (errstr != NULL)
1069                 strlcpy(err, errstr, sizeof(err));
1070         else
1071                 snprintf(err, sizeof(err), "YP unknown error %d\n", incode);
1072         return (err);
1073 }
1074
1075 int
1076 ypprot_err(unsigned int incode)
1077 {
1078         switch (incode) {
1079         case YP_TRUE:
1080                 return (0);
1081         case YP_FALSE:
1082                 return (YPERR_YPBIND);
1083         case YP_NOMORE:
1084                 return (YPERR_NOMORE);
1085         case YP_NOMAP:
1086                 return (YPERR_MAP);
1087         case YP_NODOM:
1088                 return (YPERR_DOMAIN);
1089         case YP_NOKEY:
1090                 return (YPERR_KEY);
1091         case YP_BADOP:
1092                 return (YPERR_YPERR);
1093         case YP_BADDB:
1094                 return (YPERR_BADDB);
1095         case YP_YPERR:
1096                 return (YPERR_YPERR);
1097         case YP_BADARGS:
1098                 return (YPERR_BADARGS);
1099         case YP_VERS:
1100                 return (YPERR_VERS);
1101         }
1102         return (YPERR_YPERR);
1103 }
1104
1105 int
1106 _yp_check(char **dom)
1107 {
1108         char *unused;
1109
1110         if (_yp_domain[0]=='\0')
1111                 if (yp_get_default_domain(&unused))
1112                         return (0);
1113
1114         if (dom)
1115                 *dom = _yp_domain;
1116
1117         if (yp_bind(_yp_domain) == 0) {
1118                 yp_unbind(_yp_domain);
1119                 return (1);
1120         }
1121         return (0);
1122 }