nis/ypclnt.c

   1 /* Copyright (C) 1996-2015 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <string.h>
  22 #include <unistd.h>
  23 #include <libintl.h>
  24 #include <rpc/rpc.h>
  25 #include <rpcsvc/nis.h>
  26 #include <rpcsvc/yp.h>
  27 #include <rpcsvc/ypclnt.h>
  28 #include <rpcsvc/ypupd.h>
  29 #include <sys/socket.h>
  30 #include <sys/uio.h>
  31 #include <bits/libc-lock.h>
  32
  33 /* This should only be defined on systems with a BSD compatible ypbind */
  34 #ifndef BINDINGDIR
  35 # define BINDINGDIR "/var/yp/binding"
  36 #endif
  37
  38 struct dom_binding
  39   {
  40     struct dom_binding *dom_pnext;
  41     char dom_domain[YPMAXDOMAIN + 1];
  42     struct sockaddr_in dom_server_addr;
  43     int dom_socket;
  44     CLIENT *dom_client;
  45   };
  46 typedef struct dom_binding dom_binding;
  47
  48 static const struct timeval RPCTIMEOUT = {25, 0};
  49 static const struct timeval UDPTIMEOUT = {5, 0};
  50 static int const MAXTRIES = 2;
  51 static char ypdomainname[NIS_MAXNAMELEN + 1];
  52 __libc_lock_define_initialized (static, ypbindlist_lock)
  53 static dom_binding *ypbindlist = NULL;
  54
  55
  56 static void
  57 yp_bind_client_create (const char *domain, dom_binding *ysd,
  58                        struct ypbind_resp *ypbr)
  59 {
  60   ysd->dom_server_addr.sin_family = AF_INET;
  61   memcpy (&ysd->dom_server_addr.sin_port,
  62           ypbr->ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
  63           sizeof (ysd->dom_server_addr.sin_port));
  64   memcpy (&ysd->dom_server_addr.sin_addr.s_addr,
  65           ypbr->ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
  66           sizeof (ysd->dom_server_addr.sin_addr.s_addr));
  67   strncpy (ysd->dom_domain, domain, YPMAXDOMAIN);
  68   ysd->dom_domain[YPMAXDOMAIN] = '\0';
  69
  70   ysd->dom_socket = RPC_ANYSOCK;
  71 #ifdef SOCK_CLOEXEC
  72 # define xflags SOCK_CLOEXEC
  73 #else
  74 # define xflags 0
  75 #endif
  76   ysd->dom_client = __libc_clntudp_bufcreate (&ysd->dom_server_addr, YPPROG,
  77                                               YPVERS, UDPTIMEOUT,
  78                                               &ysd->dom_socket,
  79                                               UDPMSGSIZE, UDPMSGSIZE,
  80                                               xflags);
  81
  82   if (ysd->dom_client != NULL)
  83     {
  84 #ifndef SOCK_CLOEXEC
  85       /* If the program exits, close the socket */
  86       if (fcntl (ysd->dom_socket, F_SETFD, FD_CLOEXEC) == -1)
  87         perror ("fcntl: F_SETFD");
  88 #endif
  89     }
  90 }
  91
  92 #if USE_BINDINGDIR
  93 static void
  94 yp_bind_file (const char *domain, dom_binding *ysd)
  95 {
  96   char path[sizeof (BINDINGDIR) + strlen (domain) + 3 * sizeof (unsigned) + 3];
  97
  98   snprintf (path, sizeof (path), "%s/%s.%u", BINDINGDIR, domain, YPBINDVERS);
  99   int fd = open (path, O_RDONLY);
 100   if (fd >= 0)
 101     {
 102       /* We have a binding file and could save a RPC call.  The file
 103          contains a port number and the YPBIND_RESP record.  The port
 104          number (16 bits) can be ignored.  */
 105       struct ypbind_resp ypbr;
 106
 107       if (pread (fd, &ypbr, sizeof (ypbr), 2) == sizeof (ypbr))
 108         yp_bind_client_create (domain, ysd, &ypbr);
 109
 110       close (fd);
 111     }
 112 }
 113 #endif
 114
 115 static int
 116 yp_bind_ypbindprog (const char *domain, dom_binding *ysd)
 117 {
 118   struct sockaddr_in clnt_saddr;
 119   struct ypbind_resp ypbr;
 120   int clnt_sock;
 121   CLIENT *client;
 122
 123   clnt_saddr.sin_family = AF_INET;
 124   clnt_saddr.sin_port = 0;
 125   clnt_saddr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
 126   clnt_sock = RPC_ANYSOCK;
 127   client = clnttcp_create (&clnt_saddr, YPBINDPROG, YPBINDVERS,
 128                            &clnt_sock, 0, 0);
 129   if (client == NULL)
 130     return YPERR_YPBIND;
 131
 132   /* Check the port number -- should be < IPPORT_RESERVED.
 133      If not, it's possible someone has registered a bogus
 134      ypbind with the portmapper and is trying to trick us. */
 135   if (ntohs (clnt_saddr.sin_port) >= IPPORT_RESERVED)
 136     {
 137       clnt_destroy (client);
 138       return YPERR_YPBIND;
 139     }
 140
 141   if (clnt_call (client, YPBINDPROC_DOMAIN,
 142                  (xdrproc_t) xdr_domainname, (caddr_t) &domain,
 143                  (xdrproc_t) xdr_ypbind_resp,
 144                  (caddr_t) &ypbr, RPCTIMEOUT) != RPC_SUCCESS)
 145     {
 146       clnt_destroy (client);
 147       return YPERR_YPBIND;
 148     }
 149
 150   clnt_destroy (client);
 151
 152   if (ypbr.ypbind_status != YPBIND_SUCC_VAL)
 153     {
 154       fprintf (stderr, "YPBINDPROC_DOMAIN: %s\n",
 155                ypbinderr_string (ypbr.ypbind_resp_u.ypbind_error));
 156       return YPERR_DOMAIN;
 157     }
 158   memset (&ysd->dom_server_addr, '\0', sizeof ysd->dom_server_addr);
 159
 160   yp_bind_client_create (domain, ysd, &ypbr);
 161
 162   return YPERR_SUCCESS;
 163 }
 164
 165 static int
 166 __yp_bind (const char *domain, dom_binding **ypdb)
 167 {
 168   dom_binding *ysd = NULL;
 169   int is_new = 0;
 170
 171   if (domain == NULL || domain[0] == '\0')
 172     return YPERR_BADARGS;
 173
 174   ysd = *ypdb;
 175   while (ysd != NULL)
 176     {
 177       if (strcmp (domain, ysd->dom_domain) == 0)
 178         break;
 179       ysd = ysd->dom_pnext;
 180     }
 181
 182   if (ysd == NULL)
 183     {
 184       is_new = 1;
 185       ysd = (dom_binding *) calloc (1, sizeof *ysd);
 186       if (__glibc_unlikely (ysd == NULL))
 187         return YPERR_RESRC;
 188     }
 189
 190 #if USE_BINDINGDIR
 191   /* Try binding dir at first if we have no binding */
 192   if (ysd->dom_client == NULL)
 193     yp_bind_file (domain, ysd);
 194 #endif /* USE_BINDINGDIR */
 195
 196   if (ysd->dom_client == NULL)
 197     {
 198       int retval = yp_bind_ypbindprog (domain, ysd);
 199       if (retval != YPERR_SUCCESS)
 200         {
 201           if (is_new)
 202             free (ysd);
 203           return retval;
 204         }
 205     }
 206
 207   if (ysd->dom_client == NULL)
 208     {
 209       if (is_new)
 210         free (ysd);
 211       return YPERR_YPSERV;
 212     }
 213
 214   if (is_new)
 215     {
 216       ysd->dom_pnext = *ypdb;
 217       *ypdb = ysd;
 218     }
 219
 220   return YPERR_SUCCESS;
 221 }
 222
 223 static void
 224 __yp_unbind (dom_binding *ydb)
 225 {
 226   clnt_destroy (ydb->dom_client);
 227   free (ydb);
 228 }
 229
 230 int
 231 yp_bind (const char *indomain)
 232 {
 233   int status;
 234
 235   __libc_lock_lock (ypbindlist_lock);
 236
 237   status = __yp_bind (indomain, &ypbindlist);
 238
 239   __libc_lock_unlock (ypbindlist_lock);
 240
 241   return status;
 242 }
 243 libnsl_hidden_def (yp_bind)
 244
 245 static void
 246 yp_unbind_locked (const char *indomain)
 247 {
 248   dom_binding *ydbptr, *ydbptr2;
 249
 250   ydbptr2 = NULL;
 251   ydbptr = ypbindlist;
 252
 253   while (ydbptr != NULL)
 254     {
 255       if (strcmp (ydbptr->dom_domain, indomain) == 0)
 256         {
 257           dom_binding *work;
 258
 259           work = ydbptr;
 260           if (ydbptr2 == NULL)
 261             ypbindlist = ypbindlist->dom_pnext;
 262           else
 263             ydbptr2 = ydbptr->dom_pnext;
 264           __yp_unbind (work);
 265           break;
 266         }
 267       ydbptr2 = ydbptr;
 268       ydbptr = ydbptr->dom_pnext;
 269     }
 270 }
 271
 272 void
 273 yp_unbind (const char *indomain)
 274 {
 275   __libc_lock_lock (ypbindlist_lock);
 276
 277   yp_unbind_locked (indomain);
 278
 279   __libc_lock_unlock (ypbindlist_lock);
 280
 281   return;
 282 }
 283
 284 static int
 285 __ypclnt_call (const char *domain, u_long prog, xdrproc_t xargs,
 286                caddr_t req, xdrproc_t xres, caddr_t resp, dom_binding **ydb,
 287                int print_error)
 288 {
 289   enum clnt_stat result;
 290
 291   result = clnt_call ((*ydb)->dom_client, prog,
 292                       xargs, req, xres, resp, RPCTIMEOUT);
 293
 294   if (result != RPC_SUCCESS)
 295     {
 296       /* We don't print an error message, if we try our old,
 297          cached data. Only print this for data, which should work.  */
 298       if (print_error)
 299         clnt_perror ((*ydb)->dom_client, "do_ypcall: clnt_call");
 300
 301       return YPERR_RPC;
 302     }
 303
 304   return YPERR_SUCCESS;
 305 }
 306
 307 static int
 308 do_ypcall (const char *domain, u_long prog, xdrproc_t xargs,
 309            caddr_t req, xdrproc_t xres, caddr_t resp)
 310 {
 311   dom_binding *ydb;
 312   int status;
 313   int saved_errno = errno;
 314
 315   status = YPERR_YPERR;
 316
 317   __libc_lock_lock (ypbindlist_lock);
 318   ydb = ypbindlist;
 319   while (ydb != NULL)
 320     {
 321       if (strcmp (domain, ydb->dom_domain) == 0)
 322         {
 323           if (__yp_bind (domain, &ydb) == 0)
 324             {
 325               /* Call server, print no error message, do not unbind.  */
 326               status = __ypclnt_call (domain, prog, xargs, req, xres,
 327                                       resp, &ydb, 0);
 328               if (status == YPERR_SUCCESS)
 329                 {
 330                   __libc_lock_unlock (ypbindlist_lock);
 331                   __set_errno (saved_errno);
 332                   return status;
 333                 }
 334             }
 335           /* We use ypbindlist, and the old cached data is
 336              invalid. unbind now and create a new binding */
 337           yp_unbind_locked (domain);
 338
 339           break;
 340         }
 341       ydb = ydb->dom_pnext;
 342     }
 343   __libc_lock_unlock (ypbindlist_lock);
 344
 345   /* First try with cached data failed. Now try to get
 346      current data from the system.  */
 347   ydb = NULL;
 348   if (__yp_bind (domain, &ydb) == 0)
 349     {
 350       status = __ypclnt_call (domain, prog, xargs, req, xres,
 351                               resp, &ydb, 1);
 352       __yp_unbind (ydb);
 353     }
 354
 355 #if USE_BINDINGDIR
 356   /* If we support binding dir data, we have a third chance:
 357      Ask ypbind.  */
 358   if (status != YPERR_SUCCESS)
 359     {
 360       ydb = calloc (1, sizeof (dom_binding));
 361       if (ydb != NULL && yp_bind_ypbindprog (domain, ydb) == YPERR_SUCCESS)
 362         {
 363           status = __ypclnt_call (domain, prog, xargs, req, xres,
 364                                   resp, &ydb, 1);
 365           __yp_unbind (ydb);
 366         }
 367       else
 368         free (ydb);
 369     }
 370 #endif
 371
 372   __set_errno (saved_errno);
 373
 374   return status;
 375 }
 376
 377 /* Like do_ypcall, but translate the status value if necessary.  */
 378 static int
 379 do_ypcall_tr (const char *domain, u_long prog, xdrproc_t xargs,
 380               caddr_t req, xdrproc_t xres, caddr_t resp)
 381 {
 382   int status = do_ypcall (domain, prog, xargs, req, xres, resp);
 383   if (status == YPERR_SUCCESS)
 384     /* We cast to ypresp_val although the pointer could also be of
 385        type ypresp_key_val or ypresp_master or ypresp_order or
 386        ypresp_maplist.  But the stat element is in a common prefix so
 387        this does not matter.  */
 388     status = ypprot_err (((struct ypresp_val *) resp)->stat);
 389   return status;
 390 }
 391
 392
 393 __libc_lock_define_initialized (static, domainname_lock)
 394
 395 int
 396 yp_get_default_domain (char **outdomain)
 397 {
 398   int result = YPERR_SUCCESS;;
 399   *outdomain = NULL;
 400
 401   __libc_lock_lock (domainname_lock);
 402
 403   if (ypdomainname[0] == '\0')
 404     {
 405       if (getdomainname (ypdomainname, NIS_MAXNAMELEN))
 406         result = YPERR_NODOM;
 407       else if (strcmp (ypdomainname, "(none)") == 0)
 408         {
 409           /* If domainname is not set, some systems will return "(none)" */
 410           ypdomainname[0] = '\0';
 411           result = YPERR_NODOM;
 412         }
 413       else
 414         *outdomain = ypdomainname;
 415     }
 416   else
 417     *outdomain = ypdomainname;
 418
 419   __libc_lock_unlock (domainname_lock);
 420
 421   return result;
 422 }
 423 libnsl_hidden_def (yp_get_default_domain)
 424
 425 int
 426 __yp_check (char **domain)
 427 {
 428   char *unused;
 429
 430   if (ypdomainname[0] == '\0')
 431     if (yp_get_default_domain (&unused))
 432       return 0;
 433
 434   if (domain)
 435     *domain = ypdomainname;
 436
 437   if (yp_bind (ypdomainname) == 0)
 438     return 1;
 439   return 0;
 440 }
 441
 442 int
 443 yp_match (const char *indomain, const char *inmap, const char *inkey,
 444           const int inkeylen, char **outval, int *outvallen)
 445 {
 446   ypreq_key req;
 447   ypresp_val resp;
 448   enum clnt_stat result;
 449
 450   if (indomain == NULL || indomain[0] == '\0' ||
 451       inmap == NULL || inmap[0] == '\0' ||
 452       inkey == NULL || inkey[0] == '\0' || inkeylen <= 0)
 453     return YPERR_BADARGS;
 454
 455   req.domain = (char *) indomain;
 456   req.map = (char *) inmap;
 457   req.key.keydat_val = (char *) inkey;
 458   req.key.keydat_len = inkeylen;
 459
 460   *outval = NULL;
 461   *outvallen = 0;
 462   memset (&resp, '\0', sizeof (resp));
 463
 464   result = do_ypcall_tr (indomain, YPPROC_MATCH, (xdrproc_t) xdr_ypreq_key,
 465                          (caddr_t) &req, (xdrproc_t) xdr_ypresp_val,
 466                          (caddr_t) &resp);
 467
 468   if (result != YPERR_SUCCESS)
 469     return result;
 470
 471   *outvallen = resp.val.valdat_len;
 472   *outval = malloc (*outvallen + 1);
 473   int status = YPERR_RESRC;
 474   if (__glibc_likely (*outval != NULL))
 475     {
 476       memcpy (*outval, resp.val.valdat_val, *outvallen);
 477       (*outval)[*outvallen] = '\0';
 478       status = YPERR_SUCCESS;
 479     }
 480
 481   xdr_free ((xdrproc_t) xdr_ypresp_val, (char *) &resp);
 482
 483   return status;
 484 }
 485
 486 int
 487 yp_first (const char *indomain, const char *inmap, char **outkey,
 488           int *outkeylen, char **outval, int *outvallen)
 489 {
 490   ypreq_nokey req;
 491   ypresp_key_val resp;
 492   enum clnt_stat result;
 493
 494   if (indomain == NULL || indomain[0] == '\0' ||
 495       inmap == NULL || inmap[0] == '\0')
 496     return YPERR_BADARGS;
 497
 498   req.domain = (char *) indomain;
 499   req.map = (char *) inmap;
 500
 501   *outkey = *outval = NULL;
 502   *outkeylen = *outvallen = 0;
 503   memset (&resp, '\0', sizeof (resp));
 504
 505   result = do_ypcall (indomain, YPPROC_FIRST, (xdrproc_t) xdr_ypreq_nokey,
 506                       (caddr_t) &req, (xdrproc_t) xdr_ypresp_key_val,
 507                       (caddr_t) &resp);
 508
 509   if (result != RPC_SUCCESS)
 510     return YPERR_RPC;
 511   if (resp.stat != YP_TRUE)
 512     return ypprot_err (resp.stat);
 513
 514   int status;
 515   if (__builtin_expect ((*outkey  = malloc (resp.key.keydat_len + 1)) != NULL
 516                         && (*outval = malloc (resp.val.valdat_len
 517                                               + 1)) != NULL, 1))
 518     {
 519       *outkeylen = resp.key.keydat_len;
 520       memcpy (*outkey, resp.key.keydat_val, *outkeylen);
 521       (*outkey)[*outkeylen] = '\0';
 522
 523       *outvallen = resp.val.valdat_len;
 524       memcpy (*outval, resp.val.valdat_val, *outvallen);
 525       (*outval)[*outvallen] = '\0';
 526
 527       status = YPERR_SUCCESS;
 528     }
 529   else
 530     {
 531       free (*outkey);
 532       status = YPERR_RESRC;
 533     }
 534
 535   xdr_free ((xdrproc_t) xdr_ypresp_key_val, (char *) &resp);
 536
 537   return status;
 538 }
 539
 540 int
 541 yp_next (const char *indomain, const char *inmap, const char *inkey,
 542          const int inkeylen, char **outkey, int *outkeylen, char **outval,
 543          int *outvallen)
 544 {
 545   ypreq_key req;
 546   ypresp_key_val resp;
 547   enum clnt_stat result;
 548
 549   if (indomain == NULL || indomain[0] == '\0' ||
 550       inmap == NULL || inmap[0] == '\0' ||
 551       inkeylen <= 0 || inkey == NULL || inkey[0] == '\0')
 552     return YPERR_BADARGS;
 553
 554   req.domain = (char *) indomain;
 555   req.map = (char *) inmap;
 556   req.key.keydat_val = (char *) inkey;
 557   req.key.keydat_len = inkeylen;
 558
 559   *outkey = *outval = NULL;
 560   *outkeylen = *outvallen = 0;
 561   memset (&resp, '\0', sizeof (resp));
 562
 563   result = do_ypcall_tr (indomain, YPPROC_NEXT, (xdrproc_t) xdr_ypreq_key,
 564                          (caddr_t) &req, (xdrproc_t) xdr_ypresp_key_val,
 565                          (caddr_t) &resp);
 566
 567   if (result != YPERR_SUCCESS)
 568     return result;
 569
 570   int status;
 571   if (__builtin_expect ((*outkey  = malloc (resp.key.keydat_len + 1)) != NULL
 572                         && (*outval = malloc (resp.val.valdat_len
 573                                               + 1)) != NULL, 1))
 574     {
 575       *outkeylen = resp.key.keydat_len;
 576       memcpy (*outkey, resp.key.keydat_val, *outkeylen);
 577       (*outkey)[*outkeylen] = '\0';
 578
 579       *outvallen = resp.val.valdat_len;
 580       memcpy (*outval, resp.val.valdat_val, *outvallen);
 581       (*outval)[*outvallen] = '\0';
 582
 583       status = YPERR_SUCCESS;
 584     }
 585   else
 586     {
 587       free (*outkey);
 588       status = YPERR_RESRC;
 589     }
 590
 591   xdr_free ((xdrproc_t) xdr_ypresp_key_val, (char *) &resp);
 592
 593   return status;
 594 }
 595
 596 int
 597 yp_master (const char *indomain, const char *inmap, char **outname)
 598 {
 599   ypreq_nokey req;
 600   ypresp_master resp;
 601   enum clnt_stat result;
 602
 603   if (indomain == NULL || indomain[0] == '\0' ||
 604       inmap == NULL || inmap[0] == '\0')
 605     return YPERR_BADARGS;
 606
 607   req.domain = (char *) indomain;
 608   req.map = (char *) inmap;
 609
 610   memset (&resp, '\0', sizeof (ypresp_master));
 611
 612   result = do_ypcall_tr (indomain, YPPROC_MASTER, (xdrproc_t) xdr_ypreq_nokey,
 613                          (caddr_t) &req, (xdrproc_t) xdr_ypresp_master,
 614                          (caddr_t) &resp);
 615
 616   if (result != YPERR_SUCCESS)
 617     return result;
 618
 619   *outname = strdup (resp.peer);
 620   xdr_free ((xdrproc_t) xdr_ypresp_master, (char *) &resp);
 621
 622   return *outname == NULL ? YPERR_YPERR : YPERR_SUCCESS;
 623 }
 624 libnsl_hidden_def (yp_master)
 625
 626 int
 627 yp_order (const char *indomain, const char *inmap, unsigned int *outorder)
 628 {
 629   struct ypreq_nokey req;
 630   struct ypresp_order resp;
 631   enum clnt_stat result;
 632
 633   if (indomain == NULL || indomain[0] == '\0' ||
 634       inmap == NULL || inmap[0] == '\0')
 635     return YPERR_BADARGS;
 636
 637   req.domain = (char *) indomain;
 638   req.map = (char *) inmap;
 639
 640   memset (&resp, '\0', sizeof (resp));
 641
 642   result = do_ypcall_tr (indomain, YPPROC_ORDER, (xdrproc_t) xdr_ypreq_nokey,
 643                          (caddr_t) &req, (xdrproc_t) xdr_ypresp_order,
 644                          (caddr_t) &resp);
 645
 646   if (result != YPERR_SUCCESS)
 647     return result;
 648
 649   *outorder = resp.ordernum;
 650   xdr_free ((xdrproc_t) xdr_ypresp_order, (char *) &resp);
 651
 652   return result;
 653 }
 654
 655 struct ypresp_all_data
 656 {
 657   unsigned long status;
 658   void *data;
 659   int (*foreach) (int status, char *key, int keylen,
 660                   char *val, int vallen, char *data);
 661 };
 662
 663 static bool_t
 664 __xdr_ypresp_all (XDR *xdrs, struct ypresp_all_data *objp)
 665 {
 666   while (1)
 667     {
 668       struct ypresp_all resp;
 669
 670       memset (&resp, '\0', sizeof (struct ypresp_all));
 671       if (!xdr_ypresp_all (xdrs, &resp))
 672         {
 673           xdr_free ((xdrproc_t) xdr_ypresp_all, (char *) &resp);
 674           objp->status = YP_YPERR;
 675           return FALSE;
 676         }
 677       if (resp.more == 0)
 678         {
 679           xdr_free ((xdrproc_t) xdr_ypresp_all, (char *) &resp);
 680           objp->status = YP_NOMORE;
 681           return TRUE;
 682         }
 683
 684       switch (resp.ypresp_all_u.val.stat)
 685         {
 686         case YP_TRUE:
 687           {
 688             char key[resp.ypresp_all_u.val.key.keydat_len + 1];
 689             char val[resp.ypresp_all_u.val.val.valdat_len + 1];
 690             int keylen = resp.ypresp_all_u.val.key.keydat_len;
 691             int vallen = resp.ypresp_all_u.val.val.valdat_len;
 692
 693             /* We are not allowed to modify the key and val data.
 694                But we are allowed to add data behind the buffer,
 695                if we don't modify the length. So add an extra NUL
 696                character to avoid trouble with broken code. */
 697             objp->status = YP_TRUE;
 698             *((char *) __mempcpy (key, resp.ypresp_all_u.val.key.keydat_val,
 699                                   keylen)) = '\0';
 700             *((char *) __mempcpy (val, resp.ypresp_all_u.val.val.valdat_val,
 701                                   vallen)) = '\0';
 702             xdr_free ((xdrproc_t) xdr_ypresp_all, (char *) &resp);
 703             if ((*objp->foreach) (objp->status, key, keylen,
 704                                   val, vallen, objp->data))
 705               return TRUE;
 706           }
 707           break;
 708         default:
 709           objp->status = resp.ypresp_all_u.val.stat;
 710           xdr_free ((xdrproc_t) xdr_ypresp_all, (char *) &resp);
 711           /* Sun says we don't need to make this call, but must return
 712              immediately. Since Solaris makes this call, we will call
 713              the callback function, too. */
 714           (*objp->foreach) (objp->status, NULL, 0, NULL, 0, objp->data);
 715           return TRUE;
 716         }
 717     }
 718 }
 719
 720 int
 721 yp_all (const char *indomain, const char *inmap,
 722         const struct ypall_callback *incallback)
 723 {
 724   struct ypreq_nokey req;
 725   dom_binding *ydb = NULL;
 726   int try, res;
 727   enum clnt_stat result;
 728   struct sockaddr_in clnt_sin;
 729   CLIENT *clnt;
 730   struct ypresp_all_data data;
 731   int clnt_sock;
 732   int saved_errno = errno;
 733
 734   if (indomain == NULL || indomain[0] == '\0'
 735       || inmap == NULL || inmap[0] == '\0')
 736     return YPERR_BADARGS;
 737
 738   try = 0;
 739   res = YPERR_YPERR;
 740
 741   while (try < MAXTRIES && res != YPERR_SUCCESS)
 742     {
 743       if (__yp_bind (indomain, &ydb) != 0)
 744         {
 745           __set_errno (saved_errno);
 746           return YPERR_DOMAIN;
 747         }
 748
 749       clnt_sock = RPC_ANYSOCK;
 750       clnt_sin = ydb->dom_server_addr;
 751       clnt_sin.sin_port = 0;
 752
 753       /* We don't need the UDP connection anymore.  */
 754       __yp_unbind (ydb);
 755       ydb = NULL;
 756
 757       clnt = clnttcp_create (&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
 758       if (clnt == NULL)
 759         {
 760           __set_errno (saved_errno);
 761           return YPERR_PMAP;
 762         }
 763       req.domain = (char *) indomain;
 764       req.map = (char *) inmap;
 765
 766       data.foreach = incallback->foreach;
 767       data.data = (void *) incallback->data;
 768
 769       result = clnt_call (clnt, YPPROC_ALL, (xdrproc_t) xdr_ypreq_nokey,
 770                           (caddr_t) &req, (xdrproc_t) __xdr_ypresp_all,
 771                           (caddr_t) &data, RPCTIMEOUT);
 772
 773       if (__glibc_unlikely (result != RPC_SUCCESS))
 774         {
 775           /* Print the error message only on the last try.  */
 776           if (try == MAXTRIES - 1)
 777             clnt_perror (clnt, "yp_all: clnt_call");
 778           res = YPERR_RPC;
 779         }
 780       else
 781         res = YPERR_SUCCESS;
 782
 783       clnt_destroy (clnt);
 784
 785       if (res == YPERR_SUCCESS && data.status != YP_NOMORE)
 786         {
 787           __set_errno (saved_errno);
 788           return ypprot_err (data.status);
 789         }
 790       ++try;
 791     }
 792
 793   __set_errno (saved_errno);
 794
 795   return res;
 796 }
 797
 798 int
 799
 800 yp_maplist (const char *indomain, struct ypmaplist **outmaplist)
 801 {
 802   struct ypresp_maplist resp;
 803   enum clnt_stat result;
 804
 805   if (indomain == NULL || indomain[0] == '\0')
 806     return YPERR_BADARGS;
 807
 808   memset (&resp, '\0', sizeof (resp));
 809
 810   result = do_ypcall_tr (indomain, YPPROC_MAPLIST, (xdrproc_t) xdr_domainname,
 811                          (caddr_t) &indomain, (xdrproc_t) xdr_ypresp_maplist,
 812                          (caddr_t) &resp);
 813
 814   if (__glibc_likely (result == YPERR_SUCCESS))
 815     {
 816       *outmaplist = resp.maps;
 817       /* We don't free the list, this will be done by ypserv
 818          xdr_free((xdrproc_t)xdr_ypresp_maplist, (char *)&resp); */
 819     }
 820
 821   return result;
 822 }
 823
 824 const char *
 825 yperr_string (const int error)
 826 {
 827   const char *str;
 828   switch (error)
 829     {
 830     case YPERR_SUCCESS:
 831       str = N_("Success");
 832       break;
 833     case YPERR_BADARGS:
 834       str = N_("Request arguments bad");
 835       break;
 836     case YPERR_RPC:
 837       str = N_("RPC failure on NIS operation");
 838       break;
 839     case YPERR_DOMAIN:
 840       str = N_("Can't bind to server which serves this domain");
 841       break;
 842     case YPERR_MAP:
 843       str = N_("No such map in server's domain");
 844       break;
 845     case YPERR_KEY:
 846       str = N_("No such key in map");
 847       break;
 848     case YPERR_YPERR:
 849       str = N_("Internal NIS error");
 850       break;
 851     case YPERR_RESRC:
 852       str = N_("Local resource allocation failure");
 853       break;
 854     case YPERR_NOMORE:
 855       str = N_("No more records in map database");
 856       break;
 857     case YPERR_PMAP:
 858       str = N_("Can't communicate with portmapper");
 859       break;
 860     case YPERR_YPBIND:
 861       str = N_("Can't communicate with ypbind");
 862       break;
 863     case YPERR_YPSERV:
 864       str = N_("Can't communicate with ypserv");
 865       break;
 866     case YPERR_NODOM:
 867       str = N_("Local domain name not set");
 868       break;
 869     case YPERR_BADDB:
 870       str = N_("NIS map database is bad");
 871       break;
 872     case YPERR_VERS:
 873       str = N_("NIS client/server version mismatch - can't supply service");
 874       break;
 875     case YPERR_ACCESS:
 876       str = N_("Permission denied");
 877       break;
 878     case YPERR_BUSY:
 879       str = N_("Database is busy");
 880       break;
 881     default:
 882       str = N_("Unknown NIS error code");
 883       break;
 884     }
 885   return _(str);
 886 }
 887
 888 static const int8_t yp_2_yperr[] =
 889   {
 890 #define YP2YPERR(yp, yperr)  [YP_##yp - YP_VERS] = YPERR_##yperr
 891     YP2YPERR (TRUE, SUCCESS),
 892     YP2YPERR (NOMORE, NOMORE),
 893     YP2YPERR (FALSE, YPERR),
 894     YP2YPERR (NOMAP, MAP),
 895     YP2YPERR (NODOM, DOMAIN),
 896     YP2YPERR (NOKEY, KEY),
 897     YP2YPERR (BADOP, YPERR),
 898     YP2YPERR (BADDB, BADDB),
 899     YP2YPERR (YPERR, YPERR),
 900     YP2YPERR (BADARGS, BADARGS),
 901     YP2YPERR (VERS, VERS)
 902   };
 903 int
 904 ypprot_err (const int code)
 905 {
 906   if (code < YP_VERS || code > YP_NOMORE)
 907     return YPERR_YPERR;
 908   return yp_2_yperr[code - YP_VERS];
 909 }
 910 libnsl_hidden_def (ypprot_err)
 911
 912 const char *
 913 ypbinderr_string (const int error)
 914 {
 915   const char *str;
 916   switch (error)
 917     {
 918     case 0:
 919       str = N_("Success");
 920       break;
 921     case YPBIND_ERR_ERR:
 922       str = N_("Internal ypbind error");
 923       break;
 924     case YPBIND_ERR_NOSERV:
 925       str = N_("Domain not bound");
 926       break;
 927     case YPBIND_ERR_RESC:
 928       str = N_("System resource allocation failure");
 929       break;
 930     default:
 931       str = N_("Unknown ypbind error");
 932       break;
 933     }
 934   return _(str);
 935 }
 936 libnsl_hidden_def (ypbinderr_string)
 937
 938 #define WINDOW 60
 939
 940 int
 941 yp_update (char *domain, char *map, unsigned ypop,
 942            char *key, int keylen, char *data, int datalen)
 943 {
 944   union
 945     {
 946       ypupdate_args update_args;
 947       ypdelete_args delete_args;
 948     }
 949   args;
 950   xdrproc_t xdr_argument;
 951   unsigned res = 0;
 952   CLIENT *clnt;
 953   char *master;
 954   struct sockaddr saddr;
 955   char servername[MAXNETNAMELEN + 1];
 956   int r;
 957
 958   if (!domain || !map || !key || (ypop != YPOP_DELETE && !data))
 959     return YPERR_BADARGS;
 960
 961   args.update_args.mapname = map;
 962   args.update_args.key.yp_buf_len = keylen;
 963   args.update_args.key.yp_buf_val = key;
 964   args.update_args.datum.yp_buf_len = datalen;
 965   args.update_args.datum.yp_buf_val = data;
 966
 967   if ((r = yp_master (domain, map, &master)) != YPERR_SUCCESS)
 968     return r;
 969
 970   if (!host2netname (servername, master, domain))
 971     {
 972       fputs (_("yp_update: cannot convert host to netname\n"), stderr);
 973       free (master);
 974       return YPERR_YPERR;
 975     }
 976
 977   clnt = clnt_create (master, YPU_PROG, YPU_VERS, "tcp");
 978
 979   /* We do not need the string anymore.  */
 980   free (master);
 981
 982   if (clnt == NULL)
 983     {
 984       clnt_pcreateerror ("yp_update: clnt_create");
 985       return YPERR_RPC;
 986     }
 987
 988   if (!clnt_control (clnt, CLGET_SERVER_ADDR, (char *) &saddr))
 989     {
 990       fputs (_("yp_update: cannot get server address\n"), stderr);
 991       return YPERR_RPC;
 992     }
 993
 994   switch (ypop)
 995     {
 996     case YPOP_CHANGE:
 997     case YPOP_INSERT:
 998     case YPOP_STORE:
 999       xdr_argument = (xdrproc_t) xdr_ypupdate_args;
1000       break;
1001     case YPOP_DELETE:
1002       xdr_argument = (xdrproc_t) xdr_ypdelete_args;
1003       break;
1004     default:
1005       return YPERR_BADARGS;
1006       break;
1007     }
1008
1009   clnt->cl_auth = authdes_create (servername, WINDOW, &saddr, NULL);
1010
1011   if (clnt->cl_auth == NULL)
1012     clnt->cl_auth = authunix_create_default ();
1013
1014 again:
1015   r = clnt_call (clnt, ypop, xdr_argument, (caddr_t) &args,
1016                  (xdrproc_t) xdr_u_int, (caddr_t) &res, RPCTIMEOUT);
1017
1018   if (r == RPC_AUTHERROR)
1019     {
1020       if (clnt->cl_auth->ah_cred.oa_flavor == AUTH_DES)
1021         {
1022           auth_destroy (clnt->cl_auth);
1023           clnt->cl_auth = authunix_create_default ();
1024           goto again;
1025         }
1026       else
1027         return YPERR_ACCESS;
1028     }
1029   if (r != RPC_SUCCESS)
1030     {
1031       clnt_perror (clnt, "yp_update: clnt_call");
1032       return YPERR_RPC;
1033     }
1034   return res;
1035 }