nis/ypclnt.c

   1 /* Copyright (C) 1996-2001, 2002, 2003, 2004, 2005, 2006
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <errno.h>
  22 #include <fcntl.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <libintl.h>
  26 #include <rpc/rpc.h>
  27 #include <rpcsvc/nis.h>
  28 #include <rpcsvc/yp.h>
  29 #include <rpcsvc/ypclnt.h>
  30 #include <rpcsvc/ypupd.h>
  31 #include <sys/uio.h>
  32 #include <bits/libc-lock.h>
  33
  34 /* This should only be defined on systems with a BSD compatible ypbind */
  35 #ifndef BINDINGDIR
  36 # define BINDINGDIR "/var/yp/binding"
  37 #endif
  38
  39 struct dom_binding
  40   {
  41     struct dom_binding *dom_pnext;
  42     char dom_domain[YPMAXDOMAIN + 1];
  43     struct sockaddr_in dom_server_addr;
  44     int dom_socket;
  45     CLIENT *dom_client;
  46   };
  47 typedef struct dom_binding dom_binding;
  48
  49 static const struct timeval RPCTIMEOUT = {25, 0};
  50 static const struct timeval UDPTIMEOUT = {5, 0};
  51 static int const MAXTRIES = 2;
  52 static char ypdomainname[NIS_MAXNAMELEN + 1];
  53 __libc_lock_define_initialized (static, ypbindlist_lock)
  54 static dom_binding *ypbindlist = NULL;
  55
  56
  57 static void
  58 yp_bind_client_create (const char *domain, dom_binding *ysd,
  59                        struct ypbind_resp *ypbr)
  60 {
  61   ysd->dom_server_addr.sin_family = AF_INET;
  62   memcpy (&ysd->dom_server_addr.sin_port,
  63           ypbr->ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port,
  64           sizeof (ysd->dom_server_addr.sin_port));
  65   memcpy (&ysd->dom_server_addr.sin_addr.s_addr,
  66           ypbr->ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr,
  67           sizeof (ysd->dom_server_addr.sin_addr.s_addr));
  68   strncpy (ysd->dom_domain, domain, YPMAXDOMAIN);
  69   ysd->dom_domain[YPMAXDOMAIN] = '\0';
  70
  71   ysd->dom_socket = RPC_ANYSOCK;
  72   ysd->dom_client = clntudp_create (&ysd->dom_server_addr, YPPROG, YPVERS,
  73                                     UDPTIMEOUT, &ysd->dom_socket);
  74
  75   if (ysd->dom_client != NULL)
  76     {
  77       /* If the program exits, close the socket */
  78       if (fcntl (ysd->dom_socket, F_SETFD, FD_CLOEXEC) == -1)
  79         perror ("fcntl: F_SETFD");
  80     }
  81 }
  82
  83 #if USE_BINDINGDIR
  84 static void
  85 yp_bind_file (const char *domain, dom_binding *ysd)
  86 {
  87   char path[sizeof (BINDINGDIR) + strlen (domain) + 3 * sizeof (unsigned) + 3];
  88
  89   snprintf (path, sizeof (path), "%s/%s.%u", BINDINGDIR, domain, YPBINDVERS);
  90   int fd = open (path, O_RDONLY);
  91   if (fd >= 0)
  92     {
  93       /* We have a binding file and could save a RPC call.  The file
  94          contains a port number and the YPBIND_RESP record.  The port
  95          number (16 bits) can be ignored.  */
  96       struct ypbind_resp ypbr;
  97
  98       if (pread (fd, &ypbr, sizeof (ypbr), 2) == sizeof (ypbr))
  99         yp_bind_client_create (domain, ysd, &ypbr);
 100
 101       close (fd);
 102     }
 103 }
 104 #endif
 105
 106 static int
 107 yp_bind_ypbindprog (const char *domain, dom_binding *ysd)
 108 {
 109   struct sockaddr_in clnt_saddr;
 110   struct ypbind_resp ypbr;
 111   int clnt_sock;
 112   CLIENT *client;
 113
 114   clnt_saddr.sin_family = AF_INET;
 115   clnt_saddr.sin_port = 0;
 116   clnt_saddr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
 117   clnt_sock = RPC_ANYSOCK;
 118   client = clnttcp_create (&clnt_saddr, YPBINDPROG, YPBINDVERS,
 119                            &clnt_sock, 0, 0);
 120   if (client == NULL)
 121     return YPERR_YPBIND;
 122
 123   /* Check the port number -- should be < IPPORT_RESERVED.
 124      If not, it's possible someone has registered a bogus
 125      ypbind with the portmapper and is trying to trick us. */
 126   if (ntohs (clnt_saddr.sin_port) >= IPPORT_RESERVED)
 127     {
 128       clnt_destroy (client);
 129       return YPERR_YPBIND;
 130     }
 131
 132   if (clnt_call (client, YPBINDPROC_DOMAIN,
 133                  (xdrproc_t) xdr_domainname, (caddr_t) &domain,
 134                  (xdrproc_t) xdr_ypbind_resp,
 135                  (caddr_t) &ypbr, RPCTIMEOUT) != RPC_SUCCESS)
 136     {
 137       clnt_destroy (client);
 138       return YPERR_YPBIND;
 139     }
 140
 141   clnt_destroy (client);
 142
 143   if (ypbr.ypbind_status != YPBIND_SUCC_VAL)
 144     {
 145       fprintf (stderr, "YPBINDPROC_DOMAIN: %s\n",
 146                ypbinderr_string (ypbr.ypbind_resp_u.ypbind_error));
 147       return YPERR_DOMAIN;
 148     }
 149   memset (&ysd->dom_server_addr, '\0', sizeof ysd->dom_server_addr);
 150
 151   yp_bind_client_create (domain, ysd, &ypbr);
 152
 153   return YPERR_SUCCESS;
 154 }
 155
 156 static int
 157 __yp_bind (const char *domain, dom_binding **ypdb)
 158 {
 159   dom_binding *ysd = NULL;
 160   int is_new = 0;
 161
 162   if (domain == NULL || domain[0] == '\0')
 163     return YPERR_BADARGS;
 164
 165   ysd = *ypdb;
 166   while (ysd != NULL)
 167     {
 168       if (strcmp (domain, ysd->dom_domain) == 0)
 169         break;
 170       ysd = ysd->dom_pnext;
 171     }
 172
 173   if (ysd == NULL)
 174     {
 175       is_new = 1;
 176       ysd = (dom_binding *) calloc (1, sizeof *ysd);
 177       if (__builtin_expect (ysd == NULL, 0))
 178         return YPERR_RESRC;
 179     }
 180
 181 #if USE_BINDINGDIR
 182   /* Try binding dir at first if we have no binding */
 183   if (ysd->dom_client == NULL)
 184     yp_bind_file (domain, ysd);
 185 #endif /* USE_BINDINGDIR */
 186
 187   if (ysd->dom_client == NULL)
 188     {
 189       int retval = yp_bind_ypbindprog (domain, ysd);
 190       if (retval != YPERR_SUCCESS)
 191         {
 192           if (is_new)
 193             free (ysd);
 194           return retval;
 195         }
 196     }
 197
 198   if (ysd->dom_client == NULL)
 199     {
 200       if (is_new)
 201         free (ysd);
 202       return YPERR_YPSERV;
 203     }
 204
 205   if (is_new)
 206     {
 207       ysd->dom_pnext = *ypdb;
 208       *ypdb = ysd;
 209     }
 210
 211   return YPERR_SUCCESS;
 212 }
 213
 214 static void
 215 __yp_unbind (dom_binding *ydb)
 216 {
 217   clnt_destroy (ydb->dom_client);
 218   free (ydb);
 219 }
 220
 221 int
 222 yp_bind (const char *indomain)
 223 {
 224   int status;
 225
 226   __libc_lock_lock (ypbindlist_lock);
 227
 228   status = __yp_bind (indomain, &ypbindlist);
 229
 230   __libc_lock_unlock (ypbindlist_lock);
 231
 232   return status;
 233 }
 234 libnsl_hidden_def (yp_bind)
 235
 236 static void
 237 yp_unbind_locked (const char *indomain)
 238 {
 239   dom_binding *ydbptr, *ydbptr2;
 240
 241   ydbptr2 = NULL;
 242   ydbptr = ypbindlist;
 243
 244   while (ydbptr != NULL)
 245     {
 246       if (strcmp (ydbptr->dom_domain, indomain) == 0)
 247         {
 248           dom_binding *work;
 249
 250           work = ydbptr;
 251           if (ydbptr2 == NULL)
 252             ypbindlist = ypbindlist->dom_pnext;
 253           else
 254             ydbptr2 = ydbptr->dom_pnext;
 255           __yp_unbind (work);
 256           break;
 257         }
 258       ydbptr2 = ydbptr;
 259       ydbptr = ydbptr->dom_pnext;
 260     }
 261 }
 262
 263 void
 264 yp_unbind (const char *indomain)
 265 {
 266   __libc_lock_lock (ypbindlist_lock);
 267
 268   yp_unbind_locked (indomain);
 269
 270   __libc_lock_unlock (ypbindlist_lock);
 271
 272   return;
 273 }
 274
 275 static int
 276 __ypclnt_call (const char *domain, u_long prog, xdrproc_t xargs,
 277                caddr_t req, xdrproc_t xres, caddr_t resp, dom_binding **ydb,
 278                int print_error)
 279 {
 280   enum clnt_stat result;
 281
 282   result = clnt_call ((*ydb)->dom_client, prog,
 283                       xargs, req, xres, resp, RPCTIMEOUT);
 284
 285   if (result != RPC_SUCCESS)
 286     {
 287       /* We don't print an error message, if we try our old,
 288          cached data. Only print this for data, which should work.  */
 289       if (print_error)
 290         clnt_perror ((*ydb)->dom_client, "do_ypcall: clnt_call");
 291
 292       return YPERR_RPC;
 293     }
 294
 295   return YPERR_SUCCESS;
 296 }
 297
 298 static int
 299 do_ypcall (const char *domain, u_long prog, xdrproc_t xargs,
 300            caddr_t req, xdrproc_t xres, caddr_t resp)
 301 {
 302   dom_binding *ydb;
 303   int status;
 304   int saved_errno = errno;
 305
 306   status = YPERR_YPERR;
 307
 308   __libc_lock_lock (ypbindlist_lock);
 309   ydb = ypbindlist;
 310   while (ydb != NULL)
 311     {
 312       if (strcmp (domain, ydb->dom_domain) == 0)
 313         {
 314           if (__yp_bind (domain, &ydb) == 0)
 315             {
 316               /* Call server, print no error message, do not unbind.  */
 317               status = __ypclnt_call (domain, prog, xargs, req, xres,
 318                                       resp, &ydb, 0);
 319               if (status == YPERR_SUCCESS)
 320                 {
 321                   __libc_lock_unlock (ypbindlist_lock);
 322                   __set_errno (saved_errno);
 323                   return status;
 324                 }
 325             }
 326           /* We use ypbindlist, and the old cached data is
 327              invalid. unbind now and create a new binding */
 328           yp_unbind_locked (domain);
 329
 330           break;
 331         }
 332       ydb = ydb->dom_pnext;
 333     }
 334   __libc_lock_unlock (ypbindlist_lock);
 335
 336   /* First try with cached data failed. Now try to get
 337      current data from the system.  */
 338   ydb = NULL;
 339   if (__yp_bind (domain, &ydb) == 0)
 340     {
 341       status = __ypclnt_call (domain, prog, xargs, req, xres,
 342                               resp, &ydb, 1);
 343       __yp_unbind (ydb);
 344     }
 345
 346 #if USE_BINDINGDIR
 347   /* If we support binding dir data, we have a third chance:
 348      Ask ypbind.  */
 349   if (status != YPERR_SUCCESS)
 350     {
 351       ydb = calloc (1, sizeof (dom_binding));
 352       if (ydb != NULL && yp_bind_ypbindprog (domain, ydb) == YPERR_SUCCESS)
 353         {
 354           status = __ypclnt_call (domain, prog, xargs, req, xres,
 355                                   resp, &ydb, 1);
 356           __yp_unbind (ydb);
 357         }
 358       else
 359         free (ydb);
 360     }
 361 #endif
 362
 363   __set_errno (saved_errno);
 364
 365   return status;
 366 }
 367
 368 /* Like do_ypcall, but translate the status value if necessary.  */
 369 static int
 370 do_ypcall_tr (const char *domain, u_long prog, xdrproc_t xargs,
 371               caddr_t req, xdrproc_t xres, caddr_t resp)
 372 {
 373   int status = do_ypcall (domain, prog, xargs, req, xres, resp);
 374   if (status == YPERR_SUCCESS)
 375     /* We cast to ypresp_val although the pointer could also be of
 376        type ypresp_key_val or ypresp_master or ypresp_order or
 377        ypresp_maplist.  But the stat element is in a common prefix so
 378        this does not matter.  */
 379     status = ypprot_err (((struct ypresp_val *) resp)->stat);
 380   return status;
 381 }
 382
 383
 384 __libc_lock_define_initialized (static, domainname_lock)
 385
 386 int
 387 yp_get_default_domain (char **outdomain)
 388 {
 389   int result = YPERR_SUCCESS;;
 390   *outdomain = NULL;
 391
 392   __libc_lock_lock (domainname_lock);
 393
 394   if (ypdomainname[0] == '\0')
 395     {
 396       if (getdomainname (ypdomainname, NIS_MAXNAMELEN))
 397         result = YPERR_NODOM;
 398       else if (strcmp (ypdomainname, "(none)") == 0)
 399         {
 400           /* If domainname is not set, some systems will return "(none)" */
 401           ypdomainname[0] = '\0';
 402           result = YPERR_NODOM;
 403         }
 404       else
 405         *outdomain = ypdomainname;
 406     }
 407   else
 408     *outdomain = ypdomainname;
 409
 410   __libc_lock_unlock (domainname_lock);
 411
 412   return result;
 413 }
 414 libnsl_hidden_def (yp_get_default_domain)
 415
 416 int
 417 __yp_check (char **domain)
 418 {
 419   char *unused;
 420
 421   if (ypdomainname[0] == '\0')
 422     if (yp_get_default_domain (&unused))
 423       return 0;
 424
 425   if (domain)
 426     *domain = ypdomainname;
 427
 428   if (yp_bind (ypdomainname) == 0)
 429     return 1;
 430   return 0;
 431 }
 432
 433 int
 434 yp_match (const char *indomain, const char *inmap, const char *inkey,
 435           const int inkeylen, char **outval, int *outvallen)
 436 {
 437   ypreq_key req;
 438   ypresp_val resp;
 439   enum clnt_stat result;
 440
 441   if (indomain == NULL || indomain[0] == '\0' ||
 442       inmap == NULL || inmap[0] == '\0' ||
 443       inkey == NULL || inkey[0] == '\0' || inkeylen <= 0)
 444     return YPERR_BADARGS;
 445
 446   req.domain = (char *) indomain;
 447   req.map = (char *) inmap;
 448   req.key.keydat_val = (char *) inkey;
 449   req.key.keydat_len = inkeylen;
 450
 451   *outval = NULL;
 452   *outvallen = 0;
 453   memset (&resp, '\0', sizeof (resp));
 454
 455   result = do_ypcall_tr (indomain, YPPROC_MATCH, (xdrproc_t) xdr_ypreq_key,
 456                          (caddr_t) &req, (xdrproc_t) xdr_ypresp_val,
 457                          (caddr_t) &resp);
 458
 459   if (result != YPERR_SUCCESS)
 460     return result;
 461
 462   *outvallen = resp.val.valdat_len;
 463   *outval = malloc (*outvallen + 1);
 464   int status = YPERR_RESRC;
 465   if (__builtin_expect (*outval != NULL, 1))
 466     {
 467       memcpy (*outval, resp.val.valdat_val, *outvallen);
 468       (*outval)[*outvallen] = '\0';
 469       status = YPERR_SUCCESS;
 470     }
 471
 472   xdr_free ((xdrproc_t) xdr_ypresp_val, (char *) &resp);
 473
 474   return status;
 475 }
 476
 477 int
 478 yp_first (const char *indomain, const char *inmap, char **outkey,
 479           int *outkeylen, char **outval, int *outvallen)
 480 {
 481   ypreq_nokey req;
 482   ypresp_key_val resp;
 483   enum clnt_stat result;
 484
 485   if (indomain == NULL || indomain[0] == '\0' ||
 486       inmap == NULL || inmap[0] == '\0')
 487     return YPERR_BADARGS;
 488
 489   req.domain = (char *) indomain;
 490   req.map = (char *) inmap;
 491
 492   *outkey = *outval = NULL;
 493   *outkeylen = *outvallen = 0;
 494   memset (&resp, '\0', sizeof (resp));
 495
 496   result = do_ypcall (indomain, YPPROC_FIRST, (xdrproc_t) xdr_ypreq_nokey,
 497                       (caddr_t) &req, (xdrproc_t) xdr_ypresp_key_val,
 498                       (caddr_t) &resp);
 499
 500   if (result != RPC_SUCCESS)
 501     return YPERR_RPC;
 502   if (resp.stat != YP_TRUE)
 503     return ypprot_err (resp.stat);
 504
 505   int status;
 506   if (__builtin_expect ((*outkey  = malloc (resp.key.keydat_len + 1)) != NULL
 507                         && (*outval = malloc (resp.val.valdat_len
 508                                               + 1)) != NULL, 1))
 509     {
 510       *outkeylen = resp.key.keydat_len;
 511       memcpy (*outkey, resp.key.keydat_val, *outkeylen);
 512       (*outkey)[*outkeylen] = '\0';
 513
 514       *outvallen = resp.val.valdat_len;
 515       memcpy (*outval, resp.val.valdat_val, *outvallen);
 516       (*outval)[*outvallen] = '\0';
 517
 518       status = YPERR_SUCCESS;
 519     }
 520   else
 521     {
 522       free (*outkey);
 523       status = YPERR_RESRC;
 524     }
 525
 526   xdr_free ((xdrproc_t) xdr_ypresp_key_val, (char *) &resp);
 527
 528   return status;
 529 }
 530
 531 int
 532 yp_next (const char *indomain, const char *inmap, const char *inkey,
 533          const int inkeylen, char **outkey, int *outkeylen, char **outval,
 534          int *outvallen)
 535 {
 536   ypreq_key req;
 537   ypresp_key_val resp;
 538   enum clnt_stat result;
 539
 540   if (indomain == NULL || indomain[0] == '\0' ||
 541       inmap == NULL || inmap[0] == '\0' ||
 542       inkeylen <= 0 || inkey == NULL || inkey[0] == '\0')
 543     return YPERR_BADARGS;
 544
 545   req.domain = (char *) indomain;
 546   req.map = (char *) inmap;
 547   req.key.keydat_val = (char *) inkey;
 548   req.key.keydat_len = inkeylen;
 549
 550   *outkey = *outval = NULL;
 551   *outkeylen = *outvallen = 0;
 552   memset (&resp, '\0', sizeof (resp));
 553
 554   result = do_ypcall_tr (indomain, YPPROC_NEXT, (xdrproc_t) xdr_ypreq_key,
 555                          (caddr_t) &req, (xdrproc_t) xdr_ypresp_key_val,
 556                          (caddr_t) &resp);
 557
 558   if (result != YPERR_SUCCESS)
 559     return result;
 560
 561   int status;
 562   if (__builtin_expect ((*outkey  = malloc (resp.key.keydat_len + 1)) != NULL
 563                         && (*outval = malloc (resp.val.valdat_len
 564                                               + 1)) != NULL, 1))
 565     {
 566       *outkeylen = resp.key.keydat_len;
 567       memcpy (*outkey, resp.key.keydat_val, *outkeylen);
 568       (*outkey)[*outkeylen] = '\0';
 569
 570       *outvallen = resp.val.valdat_len;
 571       memcpy (*outval, resp.val.valdat_val, *outvallen);
 572       (*outval)[*outvallen] = '\0';
 573
 574       status = YPERR_SUCCESS;
 575     }
 576   else
 577     {
 578       free (*outkey);
 579       status = YPERR_RESRC;
 580     }
 581
 582   xdr_free ((xdrproc_t) xdr_ypresp_key_val, (char *) &resp);
 583
 584   return status;
 585 }
 586
 587 int
 588 yp_master (const char *indomain, const char *inmap, char **outname)
 589 {
 590   ypreq_nokey req;
 591   ypresp_master resp;
 592   enum clnt_stat result;
 593
 594   if (indomain == NULL || indomain[0] == '\0' ||
 595       inmap == NULL || inmap[0] == '\0')
 596     return YPERR_BADARGS;
 597
 598   req.domain = (char *) indomain;
 599   req.map = (char *) inmap;
 600
 601   memset (&resp, '\0', sizeof (ypresp_master));
 602
 603   result = do_ypcall_tr (indomain, YPPROC_MASTER, (xdrproc_t) xdr_ypreq_nokey,
 604                          (caddr_t) &req, (xdrproc_t) xdr_ypresp_master,
 605                          (caddr_t) &resp);
 606
 607   if (result != YPERR_SUCCESS)
 608     return result;
 609
 610   *outname = strdup (resp.peer);
 611   xdr_free ((xdrproc_t) xdr_ypresp_master, (char *) &resp);
 612
 613   return *outname == NULL ? YPERR_YPERR : YPERR_SUCCESS;
 614 }
 615 libnsl_hidden_def (yp_master)
 616
 617 int
 618 yp_order (const char *indomain, const char *inmap, unsigned int *outorder)
 619 {
 620   struct ypreq_nokey req;
 621   struct ypresp_order resp;
 622   enum clnt_stat result;
 623
 624   if (indomain == NULL || indomain[0] == '\0' ||
 625       inmap == NULL || inmap[0] == '\0')
 626     return YPERR_BADARGS;
 627
 628   req.domain = (char *) indomain;
 629   req.map = (char *) inmap;
 630
 631   memset (&resp, '\0', sizeof (resp));
 632
 633   result = do_ypcall_tr (indomain, YPPROC_ORDER, (xdrproc_t) xdr_ypreq_nokey,
 634                          (caddr_t) &req, (xdrproc_t) xdr_ypresp_order,
 635                          (caddr_t) &resp);
 636
 637   if (result != YPERR_SUCCESS)
 638     return result;
 639
 640   *outorder = resp.ordernum;
 641   xdr_free ((xdrproc_t) xdr_ypresp_order, (char *) &resp);
 642
 643   return result;
 644 }
 645
 646 struct ypresp_all_data
 647 {
 648   unsigned long status;
 649   void *data;
 650   int (*foreach) (int status, char *key, int keylen,
 651                   char *val, int vallen, char *data);
 652 };
 653
 654 static bool_t
 655 __xdr_ypresp_all (XDR *xdrs, struct ypresp_all_data *objp)
 656 {
 657   while (1)
 658     {
 659       struct ypresp_all resp;
 660
 661       memset (&resp, '\0', sizeof (struct ypresp_all));
 662       if (!xdr_ypresp_all (xdrs, &resp))
 663         {
 664           xdr_free ((xdrproc_t) xdr_ypresp_all, (char *) &resp);
 665           objp->status = YP_YPERR;
 666           return FALSE;
 667         }
 668       if (resp.more == 0)
 669         {
 670           xdr_free ((xdrproc_t) xdr_ypresp_all, (char *) &resp);
 671           objp->status = YP_NOMORE;
 672           return TRUE;
 673         }
 674
 675       switch (resp.ypresp_all_u.val.stat)
 676         {
 677         case YP_TRUE:
 678           {
 679             char key[resp.ypresp_all_u.val.key.keydat_len + 1];
 680             char val[resp.ypresp_all_u.val.val.valdat_len + 1];
 681             int keylen = resp.ypresp_all_u.val.key.keydat_len;
 682             int vallen = resp.ypresp_all_u.val.val.valdat_len;
 683
 684             /* We are not allowed to modify the key and val data.
 685                But we are allowed to add data behind the buffer,
 686                if we don't modify the length. So add an extra NUL
 687                character to avoid trouble with broken code. */
 688             objp->status = YP_TRUE;
 689             *((char *) __mempcpy (key, resp.ypresp_all_u.val.key.keydat_val,
 690                                   keylen)) = '\0';
 691             *((char *) __mempcpy (val, resp.ypresp_all_u.val.val.valdat_val,
 692                                   vallen)) = '\0';
 693             xdr_free ((xdrproc_t) xdr_ypresp_all, (char *) &resp);
 694             if ((*objp->foreach) (objp->status, key, keylen,
 695                                   val, vallen, objp->data))
 696               return TRUE;
 697           }
 698           break;
 699         default:
 700           objp->status = resp.ypresp_all_u.val.stat;
 701           xdr_free ((xdrproc_t) xdr_ypresp_all, (char *) &resp);
 702           /* Sun says we don't need to make this call, but must return
 703              immediately. Since Solaris makes this call, we will call
 704              the callback function, too. */
 705           (*objp->foreach) (objp->status, NULL, 0, NULL, 0, objp->data);
 706           return TRUE;
 707         }
 708     }
 709 }
 710
 711 int
 712 yp_all (const char *indomain, const char *inmap,
 713         const struct ypall_callback *incallback)
 714 {
 715   struct ypreq_nokey req;
 716   dom_binding *ydb = NULL;
 717   int try, res;
 718   enum clnt_stat result;
 719   struct sockaddr_in clnt_sin;
 720   CLIENT *clnt;
 721   struct ypresp_all_data data;
 722   int clnt_sock;
 723   int saved_errno = errno;
 724
 725   if (indomain == NULL || indomain[0] == '\0'
 726       || inmap == NULL || inmap[0] == '\0')
 727     return YPERR_BADARGS;
 728
 729   try = 0;
 730   res = YPERR_YPERR;
 731
 732   while (try < MAXTRIES && res != YPERR_SUCCESS)
 733     {
 734       if (__yp_bind (indomain, &ydb) != 0)
 735         {
 736           __set_errno (saved_errno);
 737           return YPERR_DOMAIN;
 738         }
 739
 740       clnt_sock = RPC_ANYSOCK;
 741       clnt_sin = ydb->dom_server_addr;
 742       clnt_sin.sin_port = 0;
 743
 744       /* We don't need the UDP connection anymore.  */
 745       __yp_unbind (ydb);
 746       ydb = NULL;
 747
 748       clnt = clnttcp_create (&clnt_sin, YPPROG, YPVERS, &clnt_sock, 0, 0);
 749       if (clnt == NULL)
 750         {
 751           __set_errno (saved_errno);
 752           return YPERR_PMAP;
 753         }
 754       req.domain = (char *) indomain;
 755       req.map = (char *) inmap;
 756
 757       data.foreach = incallback->foreach;
 758       data.data = (void *) incallback->data;
 759
 760       result = clnt_call (clnt, YPPROC_ALL, (xdrproc_t) xdr_ypreq_nokey,
 761                           (caddr_t) &req, (xdrproc_t) __xdr_ypresp_all,
 762                           (caddr_t) &data, RPCTIMEOUT);
 763
 764       if (__builtin_expect (result != RPC_SUCCESS, 0))
 765         {
 766           /* Print the error message only on the last try.  */
 767           if (try == MAXTRIES - 1)
 768             clnt_perror (clnt, "yp_all: clnt_call");
 769           res = YPERR_RPC;
 770         }
 771       else
 772         res = YPERR_SUCCESS;
 773
 774       clnt_destroy (clnt);
 775
 776       if (res == YPERR_SUCCESS && data.status != YP_NOMORE)
 777         {
 778           __set_errno (saved_errno);
 779           return ypprot_err (data.status);
 780         }
 781       ++try;
 782     }
 783
 784   __set_errno (saved_errno);
 785
 786   return res;
 787 }
 788
 789 int
 790
 791 yp_maplist (const char *indomain, struct ypmaplist **outmaplist)
 792 {
 793   struct ypresp_maplist resp;
 794   enum clnt_stat result;
 795
 796   if (indomain == NULL || indomain[0] == '\0')
 797     return YPERR_BADARGS;
 798
 799   memset (&resp, '\0', sizeof (resp));
 800
 801   result = do_ypcall_tr (indomain, YPPROC_MAPLIST, (xdrproc_t) xdr_domainname,
 802                          (caddr_t) &indomain, (xdrproc_t) xdr_ypresp_maplist,
 803                          (caddr_t) &resp);
 804
 805   if (__builtin_expect (result == YPERR_SUCCESS, 1))
 806     {
 807       *outmaplist = resp.maps;
 808       /* We don't free the list, this will be done by ypserv
 809          xdr_free((xdrproc_t)xdr_ypresp_maplist, (char *)&resp); */
 810     }
 811
 812   return result;
 813 }
 814
 815 const char *
 816 yperr_string (const int error)
 817 {
 818   const char *str;
 819   switch (error)
 820     {
 821     case YPERR_SUCCESS:
 822       str = N_("Success");
 823       break;
 824     case YPERR_BADARGS:
 825       str = N_("Request arguments bad");
 826       break;
 827     case YPERR_RPC:
 828       str = N_("RPC failure on NIS operation");
 829       break;
 830     case YPERR_DOMAIN:
 831       str = N_("Can't bind to server which serves this domain");
 832       break;
 833     case YPERR_MAP:
 834       str = N_("No such map in server's domain");
 835       break;
 836     case YPERR_KEY:
 837       str = N_("No such key in map");
 838       break;
 839     case YPERR_YPERR:
 840       str = N_("Internal NIS error");
 841       break;
 842     case YPERR_RESRC:
 843       str = N_("Local resource allocation failure");
 844       break;
 845     case YPERR_NOMORE:
 846       str = N_("No more records in map database");
 847       break;
 848     case YPERR_PMAP:
 849       str = N_("Can't communicate with portmapper");
 850       break;
 851     case YPERR_YPBIND:
 852       str = N_("Can't communicate with ypbind");
 853       break;
 854     case YPERR_YPSERV:
 855       str = N_("Can't communicate with ypserv");
 856       break;
 857     case YPERR_NODOM:
 858       str = N_("Local domain name not set");
 859       break;
 860     case YPERR_BADDB:
 861       str = N_("NIS map database is bad");
 862       break;
 863     case YPERR_VERS:
 864       str = N_("NIS client/server version mismatch - can't supply service");
 865       break;
 866     case YPERR_ACCESS:
 867       str = N_("Permission denied");
 868       break;
 869     case YPERR_BUSY:
 870       str = N_("Database is busy");
 871       break;
 872     default:
 873       str = N_("Unknown NIS error code");
 874       break;
 875     }
 876   return _(str);
 877 }
 878
 879 static const int8_t yp_2_yperr[] =
 880   {
 881 #define YP2YPERR(yp, yperr)  [YP_##yp - YP_VERS] = YPERR_##yperr
 882     YP2YPERR (TRUE, SUCCESS),
 883     YP2YPERR (NOMORE, NOMORE),
 884     YP2YPERR (FALSE, YPERR),
 885     YP2YPERR (NOMAP, MAP),
 886     YP2YPERR (NODOM, DOMAIN),
 887     YP2YPERR (NOKEY, KEY),
 888     YP2YPERR (BADOP, YPERR),
 889     YP2YPERR (BADDB, BADDB),
 890     YP2YPERR (YPERR, YPERR),
 891     YP2YPERR (BADARGS, BADARGS),
 892     YP2YPERR (VERS, VERS)
 893   };
 894 int
 895 ypprot_err (const int code)
 896 {
 897   if (code < YP_VERS || code > YP_NOMORE)
 898     return YPERR_YPERR;
 899   return yp_2_yperr[code - YP_VERS];
 900 }
 901 libnsl_hidden_def (ypprot_err)
 902
 903 const char *
 904 ypbinderr_string (const int error)
 905 {
 906   const char *str;
 907   switch (error)
 908     {
 909     case 0:
 910       str = N_("Success");
 911       break;
 912     case YPBIND_ERR_ERR:
 913       str = N_("Internal ypbind error");
 914       break;
 915     case YPBIND_ERR_NOSERV:
 916       str = N_("Domain not bound");
 917       break;
 918     case YPBIND_ERR_RESC:
 919       str = N_("System resource allocation failure");
 920       break;
 921     default:
 922       str = N_("Unknown ypbind error");
 923       break;
 924     }
 925   return _(str);
 926 }
 927 libnsl_hidden_def (ypbinderr_string)
 928
 929 #define WINDOW 60
 930
 931 int
 932 yp_update (char *domain, char *map, unsigned ypop,
 933            char *key, int keylen, char *data, int datalen)
 934 {
 935   union
 936     {
 937       ypupdate_args update_args;
 938       ypdelete_args delete_args;
 939     }
 940   args;
 941   xdrproc_t xdr_argument;
 942   unsigned res = 0;
 943   CLIENT *clnt;
 944   char *master;
 945   struct sockaddr saddr;
 946   char servername[MAXNETNAMELEN + 1];
 947   int r;
 948
 949   if (!domain || !map || !key || (ypop != YPOP_DELETE && !data))
 950     return YPERR_BADARGS;
 951
 952   args.update_args.mapname = map;
 953   args.update_args.key.yp_buf_len = keylen;
 954   args.update_args.key.yp_buf_val = key;
 955   args.update_args.datum.yp_buf_len = datalen;
 956   args.update_args.datum.yp_buf_val = data;
 957
 958   if ((r = yp_master (domain, map, &master)) != YPERR_SUCCESS)
 959     return r;
 960
 961   if (!host2netname (servername, master, domain))
 962     {
 963       fputs (_("yp_update: cannot convert host to netname\n"), stderr);
 964       free (master);
 965       return YPERR_YPERR;
 966     }
 967
 968   clnt = clnt_create (master, YPU_PROG, YPU_VERS, "tcp");
 969
 970   /* We do not need the string anymore.  */
 971   free (master);
 972
 973   if (clnt == NULL)
 974     {
 975       clnt_pcreateerror ("yp_update: clnt_create");
 976       return YPERR_RPC;
 977     }
 978
 979   if (!clnt_control (clnt, CLGET_SERVER_ADDR, (char *) &saddr))
 980     {
 981       fputs (_("yp_update: cannot get server address\n"), stderr);
 982       return YPERR_RPC;
 983     }
 984
 985   switch (ypop)
 986     {
 987     case YPOP_CHANGE:
 988     case YPOP_INSERT:
 989     case YPOP_STORE:
 990       xdr_argument = (xdrproc_t) xdr_ypupdate_args;
 991       break;
 992     case YPOP_DELETE:
 993       xdr_argument = (xdrproc_t) xdr_ypdelete_args;
 994       break;
 995     default:
 996       return YPERR_BADARGS;
 997       break;
 998     }
 999
1000   clnt->cl_auth = authdes_create (servername, WINDOW, &saddr, NULL);
1001
1002   if (clnt->cl_auth == NULL)
1003     clnt->cl_auth = authunix_create_default ();
1004
1005 again:
1006   r = clnt_call (clnt, ypop, xdr_argument, (caddr_t) &args,
1007                  (xdrproc_t) xdr_u_int, (caddr_t) &res, RPCTIMEOUT);
1008
1009   if (r == RPC_AUTHERROR)
1010     {
1011       if (clnt->cl_auth->ah_cred.oa_flavor == AUTH_DES)
1012         {
1013           auth_destroy (clnt->cl_auth);
1014           clnt->cl_auth = authunix_create_default ();
1015           goto again;
1016         }
1017       else
1018         return YPERR_ACCESS;
1019     }
1020   if (r != RPC_SUCCESS)
1021     {
1022       clnt_perror (clnt, "yp_update: clnt_call");
1023       return YPERR_RPC;
1024     }
1025   return res;
1026 }