nis/ypclnt.c

   1 /* Copyright (C) 1996-2022 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <fcntl.h>
  20 #include <string.h>
  21 #include <unistd.h>
  22 #include <libintl.h>
  23 #include <rpc/rpc.h>
  24 #include <rpcsvc/nis.h>
  25 #include <rpcsvc/yp.h>
  26 #include <rpcsvc/ypclnt.h>
  27 #include <rpcsvc/ypupd.h>
  28 #include <sys/socket.h>
  29 #include <sys/uio.h>
  30 #include <libc-lock.h>
  31 #include <shlib-compat.h>
  32 #include <libc-diag.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 = __libc_clntudp_bufcreate (&ysd->dom_server_addr, YPPROG,
  73                                               YPVERS, UDPTIMEOUT,
  74                                               &ysd->dom_socket,
  75                                               UDPMSGSIZE, UDPMSGSIZE,
  76                                               SOCK_CLOEXEC);
  77 }
  78
  79 #if USE_BINDINGDIR
  80 static void
  81 yp_bind_file (const char *domain, dom_binding *ysd)
  82 {
  83   char path[sizeof (BINDINGDIR) + strlen (domain) + 3 * sizeof (unsigned) + 3];
  84
  85   snprintf (path, sizeof (path), "%s/%s.%u", BINDINGDIR, domain, YPBINDVERS);
  86   int fd = open (path, O_RDONLY);
  87   if (fd >= 0)
  88     {
  89       /* We have a binding file and could save a RPC call.  The file
  90          contains a port number and the YPBIND_RESP record.  The port
  91          number (16 bits) can be ignored.  */
  92       struct ypbind_resp ypbr;
  93
  94       if (pread (fd, &ypbr, sizeof (ypbr), 2) == sizeof (ypbr))
  95         yp_bind_client_create (domain, ysd, &ypbr);
  96
  97       close (fd);
  98     }
  99 }
 100 #endif
 101
 102 static int
 103 yp_bind_ypbindprog (const char *domain, dom_binding *ysd)
 104 {
 105   struct sockaddr_in clnt_saddr;
 106   struct ypbind_resp ypbr;
 107   int clnt_sock;
 108   CLIENT *client;
 109
 110   clnt_saddr.sin_family = AF_INET;
 111   clnt_saddr.sin_port = 0;
 112   clnt_saddr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
 113   clnt_sock = RPC_ANYSOCK;
 114   client = clnttcp_create (&clnt_saddr, YPBINDPROG, YPBINDVERS,
 115                            &clnt_sock, 0, 0);
 116   if (client == NULL)
 117     return YPERR_YPBIND;
 118
 119   /* Check the port number -- should be < IPPORT_RESERVED.
 120      If not, it's possible someone has registered a bogus
 121      ypbind with the portmapper and is trying to trick us. */
 122   if (ntohs (clnt_saddr.sin_port) >= IPPORT_RESERVED)
 123     {
 124       clnt_destroy (client);
 125       return YPERR_YPBIND;
 126     }
 127
 128   if (clnt_call (client, YPBINDPROC_DOMAIN,
 129                  (xdrproc_t) xdr_domainname, (caddr_t) &domain,
 130                  (xdrproc_t) xdr_ypbind_resp,
 131                  (caddr_t) &ypbr, RPCTIMEOUT) != RPC_SUCCESS)
 132     {
 133       clnt_destroy (client);
 134       return YPERR_YPBIND;
 135     }
 136
 137   clnt_destroy (client);
 138
 139   if (ypbr.ypbind_status != YPBIND_SUCC_VAL)
 140     {
 141       fprintf (stderr, "YPBINDPROC_DOMAIN: %s\n",
 142                ypbinderr_string (ypbr.ypbind_resp_u.ypbind_error));
 143       return YPERR_DOMAIN;
 144     }
 145   memset (&ysd->dom_server_addr, '\0', sizeof ysd->dom_server_addr);
 146
 147   yp_bind_client_create (domain, ysd, &ypbr);
 148
 149   return YPERR_SUCCESS;
 150 }
 151
 152 static int
 153 __yp_bind (const char *domain, dom_binding **ypdb)
 154 {
 155   dom_binding *ysd = NULL;
 156   int is_new = 0;
 157
 158   if (domain == NULL || domain[0] == '\0')
 159     return YPERR_BADARGS;
 160
 161   ysd = *ypdb;
 162   while (ysd != NULL)
 163     {
 164       if (strcmp (domain, ysd->dom_domain) == 0)
 165         break;
 166       ysd = ysd->dom_pnext;
 167     }
 168
 169   if (ysd == NULL)
 170     {
 171       is_new = 1;
 172       ysd = (dom_binding *) calloc (1, sizeof *ysd);
 173       if (__glibc_unlikely (ysd == NULL))
 174         return YPERR_RESRC;
 175     }
 176
 177 #if USE_BINDINGDIR
 178   /* Try binding dir at first if we have no binding */
 179   if (ysd->dom_client == NULL)
 180     yp_bind_file (domain, ysd);
 181 #endif /* USE_BINDINGDIR */
 182
 183   if (ysd->dom_client == NULL)
 184     {
 185       int retval = yp_bind_ypbindprog (domain, ysd);
 186       if (retval != YPERR_SUCCESS)
 187         {
 188           if (is_new)
 189             free (ysd);
 190           return retval;
 191         }
 192     }
 193
 194   if (ysd->dom_client == NULL)
 195     {
 196       if (is_new)
 197         free (ysd);
 198       return YPERR_YPSERV;
 199     }
 200
 201   if (is_new)
 202     {
 203       ysd->dom_pnext = *ypdb;
 204       *ypdb = ysd;
 205     }
 206
 207   return YPERR_SUCCESS;
 208 }
 209
 210 static void
 211 __yp_unbind (dom_binding *ydb)
 212 {
 213   clnt_destroy (ydb->dom_client);
 214   free (ydb);
 215 }
 216
 217 int
 218 yp_bind (const char *indomain)
 219 {
 220   int status;
 221
 222   __libc_lock_lock (ypbindlist_lock);
 223
 224   status = __yp_bind (indomain, &ypbindlist);
 225
 226   __libc_lock_unlock (ypbindlist_lock);
 227
 228   return status;
 229 }
 230 libnsl_hidden_nolink_def (yp_bind, GLIBC_2_0)
 231
 232 static void
 233 yp_unbind_locked (const char *indomain)
 234 {
 235   dom_binding *ydbptr, *ydbptr2;
 236
 237   ydbptr2 = NULL;
 238   ydbptr = ypbindlist;
 239
 240   while (ydbptr != NULL)
 241     {
 242       if (strcmp (ydbptr->dom_domain, indomain) == 0)
 243         {
 244           dom_binding *work;
 245
 246           work = ydbptr;
 247           if (ydbptr2 == NULL)
 248             ypbindlist = ypbindlist->dom_pnext;
 249           else
 250             ydbptr2 = ydbptr->dom_pnext;
 251           __yp_unbind (work);
 252           break;
 253         }
 254       ydbptr2 = ydbptr;
 255       ydbptr = ydbptr->dom_pnext;
 256     }
 257 }
 258
 259 void
 260 yp_unbind (const char *indomain)
 261 {
 262   __libc_lock_lock (ypbindlist_lock);
 263
 264   yp_unbind_locked (indomain);
 265
 266   __libc_lock_unlock (ypbindlist_lock);
 267
 268   return;
 269 }
 270 libnsl_hidden_nolink_def(yp_unbind, GLIBC_2_0)
 271
 272 static int
 273 __ypclnt_call (const char *domain, u_long prog, xdrproc_t xargs,
 274                caddr_t req, xdrproc_t xres, caddr_t resp, dom_binding **ydb,
 275                int print_error)
 276 {
 277   enum clnt_stat result;
 278
 279   result = clnt_call ((*ydb)->dom_client, prog,
 280                       xargs, req, xres, resp, RPCTIMEOUT);
 281
 282   if (result != RPC_SUCCESS)
 283     {
 284       /* We don't print an error message, if we try our old,
 285          cached data. Only print this for data, which should work.  */
 286       if (print_error)
 287         clnt_perror ((*ydb)->dom_client, "do_ypcall: clnt_call");
 288
 289       return YPERR_RPC;
 290     }
 291
 292   return YPERR_SUCCESS;
 293 }
 294
 295 static int
 296 do_ypcall (const char *domain, u_long prog, xdrproc_t xargs,
 297            caddr_t req, xdrproc_t xres, caddr_t resp)
 298 {
 299   dom_binding *ydb;
 300   int status;
 301   int saved_errno = errno;
 302
 303   status = YPERR_YPERR;
 304
 305   __libc_lock_lock (ypbindlist_lock);
 306   ydb = ypbindlist;
 307   while (ydb != NULL)
 308     {
 309       if (strcmp (domain, ydb->dom_domain) == 0)
 310         {
 311           if (__yp_bind (domain, &ydb) == 0)
 312             {
 313               /* Call server, print no error message, do not unbind.  */
 314               status = __ypclnt_call (domain, prog, xargs, req, xres,
 315                                       resp, &ydb, 0);
 316               if (status == YPERR_SUCCESS)
 317                 {
 318                   __libc_lock_unlock (ypbindlist_lock);
 319                   __set_errno (saved_errno);
 320                   return status;
 321                 }
 322             }
 323           /* We use ypbindlist, and the old cached data is
 324              invalid. unbind now and create a new binding */
 325           yp_unbind_locked (domain);
 326
 327           break;
 328         }
 329       ydb = ydb->dom_pnext;
 330     }
 331   __libc_lock_unlock (ypbindlist_lock);
 332
 333   /* First try with cached data failed. Now try to get
 334      current data from the system.  */
 335   ydb = NULL;
 336   if (__yp_bind (domain, &ydb) == 0)
 337     {
 338       status = __ypclnt_call (domain, prog, xargs, req, xres,
 339                               resp, &ydb, 1);
 340       __yp_unbind (ydb);
 341     }
 342
 343 #if USE_BINDINGDIR
 344   /* If we support binding dir data, we have a third chance:
 345      Ask ypbind.  */
 346   if (status != YPERR_SUCCESS)
 347     {
 348       ydb = calloc (1, sizeof (dom_binding));
 349       if (ydb != NULL && yp_bind_ypbindprog (domain, ydb) == YPERR_SUCCESS)
 350         {
 351           status = __ypclnt_call (domain, prog, xargs, req, xres,
 352                                   resp, &ydb, 1);
 353           __yp_unbind (ydb);
 354         }
 355       else
 356         free (ydb);
 357     }
 358 #endif
 359
 360   __set_errno (saved_errno);
 361
 362   return status;
 363 }
 364
 365 /* Like do_ypcall, but translate the status value if necessary.  */
 366 static int
 367 do_ypcall_tr (const char *domain, u_long prog, xdrproc_t xargs,
 368               caddr_t req, xdrproc_t xres, caddr_t resp)
 369 {
 370   int status = do_ypcall (domain, prog, xargs, req, xres, resp);
 371   DIAG_PUSH_NEEDS_COMMENT;
 372   /* This cast results in a warning that a ypresp_val is partly
 373      outside the bounds of the actual object referenced, but as
 374      explained below only the stat element (in a common prefix) is
 375      accessed.  */
 376   DIAG_IGNORE_NEEDS_COMMENT (11, "-Warray-bounds");
 377   if (status == YPERR_SUCCESS)
 378     /* We cast to ypresp_val although the pointer could also be of
 379        type ypresp_key_val or ypresp_master or ypresp_order or
 380        ypresp_maplist.  But the stat element is in a common prefix so
 381        this does not matter.  */
 382     status = ypprot_err (((struct ypresp_val *) resp)->stat);
 383   DIAG_POP_NEEDS_COMMENT;
 384   return status;
 385 }
 386
 387
 388 __libc_lock_define_initialized (static, domainname_lock)
 389
 390 int
 391 yp_get_default_domain (char **outdomain)
 392 {
 393   int result = YPERR_SUCCESS;;
 394   *outdomain = NULL;
 395
 396   __libc_lock_lock (domainname_lock);
 397
 398   if (ypdomainname[0] == '\0')
 399     {
 400       if (getdomainname (ypdomainname, NIS_MAXNAMELEN))
 401         result = YPERR_NODOM;
 402       else if (strcmp (ypdomainname, "(none)") == 0)
 403         {
 404           /* If domainname is not set, some systems will return "(none)" */
 405           ypdomainname[0] = '\0';
 406           result = YPERR_NODOM;
 407         }
 408       else
 409         *outdomain = ypdomainname;
 410     }
 411   else
 412     *outdomain = ypdomainname;
 413
 414   __libc_lock_unlock (domainname_lock);
 415
 416   return result;
 417 }
 418 libnsl_hidden_nolink_def (yp_get_default_domain, GLIBC_2_0)
 419
 420 int
 421 __yp_check (char **domain)
 422 {
 423   char *unused;
 424
 425   if (ypdomainname[0] == '\0')
 426     if (yp_get_default_domain (&unused))
 427       return 0;
 428
 429   if (domain)
 430     *domain = ypdomainname;
 431
 432   if (yp_bind (ypdomainname) == 0)
 433     return 1;
 434   return 0;
 435 }
 436 libnsl_hidden_nolink_def(__yp_check, GLIBC_2_0)
 437
 438 int
 439 yp_match (const char *indomain, const char *inmap, const char *inkey,
 440           const int inkeylen, char **outval, int *outvallen)
 441 {
 442   ypreq_key req;
 443   ypresp_val resp;
 444   enum clnt_stat result;
 445
 446   if (indomain == NULL || indomain[0] == '\0'
 447       || inmap == NULL || inmap[0] == '\0'
 448       || inkey == NULL || inkey[0] == '\0' || inkeylen <= 0)
 449     return YPERR_BADARGS;
 450
 451   req.domain = (char *) indomain;
 452   req.map = (char *) inmap;
 453   req.key.keydat_val = (char *) inkey;
 454   req.key.keydat_len = inkeylen;
 455
 456   *outval = NULL;
 457   *outvallen = 0;
 458   memset (&resp, '\0', sizeof (resp));
 459
 460   result = do_ypcall_tr (indomain, YPPROC_MATCH, (xdrproc_t) xdr_ypreq_key,
 461                          (caddr_t) &req, (xdrproc_t) xdr_ypresp_val,
 462                          (caddr_t) &resp);
 463
 464   if (result != YPERR_SUCCESS)
 465     return result;
 466
 467   *outvallen = resp.val.valdat_len;
 468   *outval = malloc (*outvallen + 1);
 469   int status = YPERR_RESRC;
 470   if (__glibc_likely (*outval != NULL))
 471     {
 472       memcpy (*outval, resp.val.valdat_val, *outvallen);
 473       (*outval)[*outvallen] = '\0';
 474       status = YPERR_SUCCESS;
 475     }
 476
 477   xdr_free ((xdrproc_t) xdr_ypresp_val, (char *) &resp);
 478
 479   return status;
 480 }
 481 libnsl_hidden_nolink_def(yp_match, GLIBC_2_0)
 482
 483 int
 484 yp_first (const char *indomain, const char *inmap, char **outkey,
 485           int *outkeylen, char **outval, int *outvallen)
 486 {
 487   ypreq_nokey req;
 488   ypresp_key_val resp;
 489   enum clnt_stat result;
 490
 491   if (indomain == NULL || indomain[0] == '\0'
 492       || inmap == NULL || inmap[0] == '\0')
 493     return YPERR_BADARGS;
 494
 495   req.domain = (char *) indomain;
 496   req.map = (char *) inmap;
 497
 498   *outkey = *outval = NULL;
 499   *outkeylen = *outvallen = 0;
 500   memset (&resp, '\0', sizeof (resp));
 501
 502   result = do_ypcall (indomain, YPPROC_FIRST, (xdrproc_t) xdr_ypreq_nokey,
 503                       (caddr_t) &req, (xdrproc_t) xdr_ypresp_key_val,
 504                       (caddr_t) &resp);
 505
 506   if (result != RPC_SUCCESS)
 507     return YPERR_RPC;
 508   if (resp.stat != YP_TRUE)
 509     return ypprot_err (resp.stat);
 510
 511   int status;
 512   if (__builtin_expect ((*outkey  = malloc (resp.key.keydat_len + 1)) != NULL
 513                         && (*outval = malloc (resp.val.valdat_len
 514                                               + 1)) != NULL, 1))
 515     {
 516       *outkeylen = resp.key.keydat_len;
 517       memcpy (*outkey, resp.key.keydat_val, *outkeylen);
 518       (*outkey)[*outkeylen] = '\0';
 519
 520       *outvallen = resp.val.valdat_len;
 521       memcpy (*outval, resp.val.valdat_val, *outvallen);
 522       (*outval)[*outvallen] = '\0';
 523
 524       status = YPERR_SUCCESS;
 525     }
 526   else
 527     {
 528       free (*outkey);
 529       status = YPERR_RESRC;
 530     }
 531
 532   xdr_free ((xdrproc_t) xdr_ypresp_key_val, (char *) &resp);
 533
 534   return status;
 535 }
 536 libnsl_hidden_nolink_def(yp_first, GLIBC_2_0)
 537
 538 int
 539 yp_next (const char *indomain, const char *inmap, const char *inkey,
 540          const int inkeylen, char **outkey, int *outkeylen, char **outval,
 541          int *outvallen)
 542 {
 543   ypreq_key req;
 544   ypresp_key_val resp;
 545   enum clnt_stat result;
 546
 547   if (indomain == NULL || indomain[0] == '\0'
 548       || inmap == NULL || inmap[0] == '\0'
 549       || inkeylen <= 0 || inkey == NULL || inkey[0] == '\0')
 550     return YPERR_BADARGS;
 551
 552   req.domain = (char *) indomain;
 553   req.map = (char *) inmap;
 554   req.key.keydat_val = (char *) inkey;
 555   req.key.keydat_len = inkeylen;
 556
 557   *outkey = *outval = NULL;
 558   *outkeylen = *outvallen = 0;
 559   memset (&resp, '\0', sizeof (resp));
 560
 561   result = do_ypcall_tr (indomain, YPPROC_NEXT, (xdrproc_t) xdr_ypreq_key,
 562                          (caddr_t) &req, (xdrproc_t) xdr_ypresp_key_val,
 563                          (caddr_t) &resp);
 564
 565   if (result != YPERR_SUCCESS)
 566     return result;
 567
 568   int status;
 569   if (__builtin_expect ((*outkey  = malloc (resp.key.keydat_len + 1)) != NULL
 570                         && (*outval = malloc (resp.val.valdat_len
 571                                               + 1)) != NULL, 1))
 572     {
 573       *outkeylen = resp.key.keydat_len;
 574       memcpy (*outkey, resp.key.keydat_val, *outkeylen);
 575       (*outkey)[*outkeylen] = '\0';
 576
 577       *outvallen = resp.val.valdat_len;
 578       memcpy (*outval, resp.val.valdat_val, *outvallen);
 579       (*outval)[*outvallen] = '\0';
 580
 581       status = YPERR_SUCCESS;
 582     }
 583   else
 584     {
 585       free (*outkey);
 586       status = YPERR_RESRC;
 587     }
 588
 589   xdr_free ((xdrproc_t) xdr_ypresp_key_val, (char *) &resp);
 590
 591   return status;
 592 }
 593 libnsl_hidden_nolink_def(yp_next, GLIBC_2_0)
 594
 595 int
 596 yp_master (const char *indomain, const char *inmap, char **outname)
 597 {
 598   ypreq_nokey req;
 599   ypresp_master resp;
 600   enum clnt_stat result;
 601
 602   if (indomain == NULL || indomain[0] == '\0'
 603       || inmap == NULL || inmap[0] == '\0')
 604     return YPERR_BADARGS;
 605
 606   req.domain = (char *) indomain;
 607   req.map = (char *) inmap;
 608
 609   memset (&resp, '\0', sizeof (ypresp_master));
 610
 611   result = do_ypcall_tr (indomain, YPPROC_MASTER, (xdrproc_t) xdr_ypreq_nokey,
 612                          (caddr_t) &req, (xdrproc_t) xdr_ypresp_master,
 613                          (caddr_t) &resp);
 614
 615   if (result != YPERR_SUCCESS)
 616     return result;
 617
 618   *outname = strdup (resp.peer);
 619   xdr_free ((xdrproc_t) xdr_ypresp_master, (char *) &resp);
 620
 621   return *outname == NULL ? YPERR_YPERR : YPERR_SUCCESS;
 622 }
 623 libnsl_hidden_nolink_def (yp_master, GLIBC_2_0)
 624
 625 int
 626 yp_order (const char *indomain, const char *inmap, unsigned int *outorder)
 627 {
 628   struct ypreq_nokey req;
 629   struct ypresp_order resp;
 630   enum clnt_stat result;
 631
 632   if (indomain == NULL || indomain[0] == '\0'
 633       || inmap == NULL || inmap[0] == '\0')
 634     return YPERR_BADARGS;
 635
 636   req.domain = (char *) indomain;
 637   req.map = (char *) inmap;
 638
 639   memset (&resp, '\0', sizeof (resp));
 640
 641   result = do_ypcall_tr (indomain, YPPROC_ORDER, (xdrproc_t) xdr_ypreq_nokey,
 642                          (caddr_t) &req, (xdrproc_t) xdr_ypresp_order,
 643                          (caddr_t) &resp);
 644
 645   if (result != YPERR_SUCCESS)
 646     return result;
 647
 648   *outorder = resp.ordernum;
 649   xdr_free ((xdrproc_t) xdr_ypresp_order, (char *) &resp);
 650
 651   return result;
 652 }
 653 libnsl_hidden_nolink_def(yp_order, GLIBC_2_0)
 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 libnsl_hidden_nolink_def (yp_all, GLIBC_2_0)
 798
 799 int
 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 libnsl_hidden_nolink_def (yp_maplist, GLIBC_2_0)
 824
 825 const char *
 826 yperr_string (const int error)
 827 {
 828   const char *str;
 829   switch (error)
 830     {
 831     case YPERR_SUCCESS:
 832       str = N_("Success");
 833       break;
 834     case YPERR_BADARGS:
 835       str = N_("Request arguments bad");
 836       break;
 837     case YPERR_RPC:
 838       str = N_("RPC failure on NIS operation");
 839       break;
 840     case YPERR_DOMAIN:
 841       str = N_("Can't bind to server which serves this domain");
 842       break;
 843     case YPERR_MAP:
 844       str = N_("No such map in server's domain");
 845       break;
 846     case YPERR_KEY:
 847       str = N_("No such key in map");
 848       break;
 849     case YPERR_YPERR:
 850       str = N_("Internal NIS error");
 851       break;
 852     case YPERR_RESRC:
 853       str = N_("Local resource allocation failure");
 854       break;
 855     case YPERR_NOMORE:
 856       str = N_("No more records in map database");
 857       break;
 858     case YPERR_PMAP:
 859       str = N_("Can't communicate with portmapper");
 860       break;
 861     case YPERR_YPBIND:
 862       str = N_("Can't communicate with ypbind");
 863       break;
 864     case YPERR_YPSERV:
 865       str = N_("Can't communicate with ypserv");
 866       break;
 867     case YPERR_NODOM:
 868       str = N_("Local domain name not set");
 869       break;
 870     case YPERR_BADDB:
 871       str = N_("NIS map database is bad");
 872       break;
 873     case YPERR_VERS:
 874       str = N_("NIS client/server version mismatch - can't supply service");
 875       break;
 876     case YPERR_ACCESS:
 877       str = N_("Permission denied");
 878       break;
 879     case YPERR_BUSY:
 880       str = N_("Database is busy");
 881       break;
 882     default:
 883       str = N_("Unknown NIS error code");
 884       break;
 885     }
 886   return _(str);
 887 }
 888 libnsl_hidden_nolink_def(yperr_string, GLIBC_2_0)
 889
 890 static const int8_t yp_2_yperr[] =
 891   {
 892 #define YP2YPERR(yp, yperr)  [YP_##yp - YP_VERS] = YPERR_##yperr
 893     YP2YPERR (TRUE, SUCCESS),
 894     YP2YPERR (NOMORE, NOMORE),
 895     YP2YPERR (FALSE, YPERR),
 896     YP2YPERR (NOMAP, MAP),
 897     YP2YPERR (NODOM, DOMAIN),
 898     YP2YPERR (NOKEY, KEY),
 899     YP2YPERR (BADOP, YPERR),
 900     YP2YPERR (BADDB, BADDB),
 901     YP2YPERR (YPERR, YPERR),
 902     YP2YPERR (BADARGS, BADARGS),
 903     YP2YPERR (VERS, VERS)
 904   };
 905 int
 906 ypprot_err (const int code)
 907 {
 908   if (code < YP_VERS || code > YP_NOMORE)
 909     return YPERR_YPERR;
 910   return yp_2_yperr[code - YP_VERS];
 911 }
 912 libnsl_hidden_nolink_def (ypprot_err, GLIBC_2_0)
 913
 914 const char *
 915 ypbinderr_string (const int error)
 916 {
 917   const char *str;
 918   switch (error)
 919     {
 920     case 0:
 921       str = N_("Success");
 922       break;
 923     case YPBIND_ERR_ERR:
 924       str = N_("Internal ypbind error");
 925       break;
 926     case YPBIND_ERR_NOSERV:
 927       str = N_("Domain not bound");
 928       break;
 929     case YPBIND_ERR_RESC:
 930       str = N_("System resource allocation failure");
 931       break;
 932     default:
 933       str = N_("Unknown ypbind error");
 934       break;
 935     }
 936   return _(str);
 937 }
 938 libnsl_hidden_nolink_def (ypbinderr_string, GLIBC_2_0)
 939
 940 #define WINDOW 60
 941
 942 int
 943 yp_update (char *domain, char *map, unsigned ypop,
 944            char *key, int keylen, char *data, int datalen)
 945 {
 946   union
 947     {
 948       ypupdate_args update_args;
 949       ypdelete_args delete_args;
 950     }
 951   args;
 952   xdrproc_t xdr_argument;
 953   unsigned res = 0;
 954   CLIENT *clnt;
 955   char *master;
 956   struct sockaddr saddr;
 957   char servername[MAXNETNAMELEN + 1];
 958   int r;
 959
 960   if (!domain || !map || !key || (ypop != YPOP_DELETE && !data))
 961     return YPERR_BADARGS;
 962
 963   args.update_args.mapname = map;
 964   args.update_args.key.yp_buf_len = keylen;
 965   args.update_args.key.yp_buf_val = key;
 966   args.update_args.datum.yp_buf_len = datalen;
 967   args.update_args.datum.yp_buf_val = data;
 968
 969   if ((r = yp_master (domain, map, &master)) != YPERR_SUCCESS)
 970     return r;
 971
 972   if (!host2netname (servername, master, domain))
 973     {
 974       fputs (_("yp_update: cannot convert host to netname\n"), stderr);
 975       free (master);
 976       return YPERR_YPERR;
 977     }
 978
 979   clnt = clnt_create (master, YPU_PROG, YPU_VERS, "tcp");
 980
 981   /* We do not need the string anymore.  */
 982   free (master);
 983
 984   if (clnt == NULL)
 985     {
 986       clnt_pcreateerror ("yp_update: clnt_create");
 987       return YPERR_RPC;
 988     }
 989
 990   if (!clnt_control (clnt, CLGET_SERVER_ADDR, (char *) &saddr))
 991     {
 992       fputs (_("yp_update: cannot get server address\n"), stderr);
 993       return YPERR_RPC;
 994     }
 995
 996   switch (ypop)
 997     {
 998     case YPOP_CHANGE:
 999     case YPOP_INSERT:
1000     case YPOP_STORE:
1001       xdr_argument = (xdrproc_t) xdr_ypupdate_args;
1002       break;
1003     case YPOP_DELETE:
1004       xdr_argument = (xdrproc_t) xdr_ypdelete_args;
1005       break;
1006     default:
1007       return YPERR_BADARGS;
1008       break;
1009     }
1010
1011   clnt->cl_auth = authdes_create (servername, WINDOW, &saddr, NULL);
1012
1013   if (clnt->cl_auth == NULL)
1014     clnt->cl_auth = authunix_create_default ();
1015
1016 again:
1017   r = clnt_call (clnt, ypop, xdr_argument, (caddr_t) &args,
1018                  (xdrproc_t) xdr_u_int, (caddr_t) &res, RPCTIMEOUT);
1019
1020   if (r == RPC_AUTHERROR)
1021     {
1022       if (clnt->cl_auth->ah_cred.oa_flavor == AUTH_DES)
1023         {
1024           auth_destroy (clnt->cl_auth);
1025           clnt->cl_auth = authunix_create_default ();
1026           goto again;
1027         }
1028       else
1029         return YPERR_ACCESS;
1030     }
1031   if (r != RPC_SUCCESS)
1032     {
1033       clnt_perror (clnt, "yp_update: clnt_call");
1034       return YPERR_RPC;
1035     }
1036   return res;
1037 }
1038 libnsl_hidden_nolink_def(yp_update, GLIBC_2_0)