source3/nmbd/nmbd_namelistdb.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    NBT netbios routines and daemon - version 2
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) Luke Kenneth Casson Leighton 1994-1998
   6    Copyright (C) Jeremy Allison 1994-2003
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 */
  22
  23 #include "includes.h"
  24 #include "nmbd/nmbd.h"
  25
  26 uint16 samba_nb_type = 0; /* samba's NetBIOS name type */
  27
  28
  29 /**************************************************************************
  30  Set Samba's NetBIOS name type.
  31 ***************************************************************************/
  32
  33 void set_samba_nb_type(void)
  34 {
  35         if( lp_wins_support() || wins_srv_count() ) {
  36                 samba_nb_type = NB_HFLAG;               /* samba is a 'hybrid' node type. */
  37         } else {
  38                 samba_nb_type = NB_BFLAG;           /* samba is broadcast-only node type. */
  39         }
  40 }
  41
  42 /***************************************************************************
  43  Convert a NetBIOS name to upper case.
  44 ***************************************************************************/
  45
  46 static void upcase_name( struct nmb_name *target, const struct nmb_name *source )
  47 {
  48         int i;
  49         unstring targ;
  50         fstring scope;
  51
  52         if( NULL != source ) {
  53                 memcpy( target, source, sizeof( struct nmb_name ) );
  54         }
  55
  56         pull_ascii_nstring(targ, sizeof(targ), target->name);
  57         strupper_m( targ );
  58         push_ascii_nstring( target->name, targ);
  59
  60         pull_ascii(scope, target->scope, 64, -1, STR_TERMINATE);
  61         strupper_m( scope );
  62         push_ascii(target->scope, scope, 64, STR_TERMINATE);
  63
  64         /* fudge... We're using a byte-by-byte compare, so we must be sure that
  65          * unused space doesn't have garbage in it.
  66          */
  67
  68         for( i = strlen( target->name ); i < sizeof( target->name ); i++ ) {
  69                 target->name[i] = '\0';
  70         }
  71         for( i = strlen( target->scope ); i < sizeof( target->scope ); i++ ) {
  72                 target->scope[i] = '\0';
  73         }
  74 }
  75
  76 /**************************************************************************
  77  Remove a name from the namelist.
  78 ***************************************************************************/
  79
  80 void remove_name_from_namelist(struct subnet_record *subrec,
  81                                 struct name_record *namerec )
  82 {
  83         if (subrec == wins_server_subnet)
  84                 remove_name_from_wins_namelist(namerec);
  85         else {
  86                 subrec->namelist_changed = True;
  87                 DLIST_REMOVE(subrec->namelist, namerec);
  88         }
  89
  90         SAFE_FREE(namerec->data.ip);
  91         ZERO_STRUCTP(namerec);
  92         SAFE_FREE(namerec);
  93 }
  94
  95 /**************************************************************************
  96  Find a name in a subnet.
  97 **************************************************************************/
  98
  99 struct name_record *find_name_on_subnet(struct subnet_record *subrec,
 100                                 const struct nmb_name *nmbname,
 101                                 bool self_only)
 102 {
 103         struct nmb_name uc_name;
 104         struct name_record *name_ret;
 105
 106         upcase_name( &uc_name, nmbname );
 107
 108         if (subrec == wins_server_subnet) {
 109                 return find_name_on_wins_subnet(&uc_name, self_only);
 110         }
 111
 112         for( name_ret = subrec->namelist; name_ret; name_ret = name_ret->next) {
 113                 if (memcmp(&uc_name, &name_ret->name, sizeof(struct nmb_name)) == 0) {
 114                         break;
 115                 }
 116         }
 117
 118         if( name_ret ) {
 119                 /* Self names only - these include permanent names. */
 120                 if( self_only && (name_ret->data.source != SELF_NAME) && (name_ret->data.source != PERMANENT_NAME) ) {
 121                         DEBUG( 9, ( "find_name_on_subnet: on subnet %s - self name %s NOT FOUND\n",
 122                                                 subrec->subnet_name, nmb_namestr(nmbname) ) );
 123                         return NULL;
 124                 }
 125
 126                 DEBUG( 9, ("find_name_on_subnet: on subnet %s - found name %s source=%d\n",
 127                         subrec->subnet_name, nmb_namestr(nmbname), name_ret->data.source) );
 128
 129                 return name_ret;
 130         }
 131
 132         DEBUG( 9, ( "find_name_on_subnet: on subnet %s - name %s NOT FOUND\n",
 133                 subrec->subnet_name, nmb_namestr(nmbname) ) );
 134
 135         return NULL;
 136 }
 137
 138 /**************************************************************************
 139  Find a name over all known broadcast subnets.
 140 ************************************************************************/
 141
 142 struct name_record *find_name_for_remote_broadcast_subnet(struct nmb_name *nmbname,
 143                                                 bool self_only)
 144 {
 145         struct subnet_record *subrec;
 146         struct name_record *namerec;
 147
 148         for( subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec) ) {
 149                 namerec = find_name_on_subnet(subrec, nmbname, self_only);
 150                 if (namerec) {
 151                         return namerec;
 152                 }
 153         }
 154
 155         return NULL;
 156 }
 157
 158 /**************************************************************************
 159  Update the ttl of an entry in a subnet name list.
 160 ***************************************************************************/
 161
 162 void update_name_ttl( struct name_record *namerec, int ttl )
 163 {
 164         time_t time_now = time(NULL);
 165
 166         if( namerec->data.death_time != PERMANENT_TTL) {
 167                 namerec->data.death_time = time_now + ttl;
 168         }
 169
 170         namerec->data.refresh_time = time_now + MIN((ttl/2), MAX_REFRESH_TIME);
 171
 172         if (namerec->subnet == wins_server_subnet) {
 173                 wins_store_changed_namerec(namerec);
 174         } else {
 175                 namerec->subnet->namelist_changed = True;
 176         }
 177 }
 178
 179 /**************************************************************************
 180  Add an entry to a subnet name list.
 181 ***********************************************************************/
 182
 183 bool add_name_to_subnet( struct subnet_record *subrec,
 184                         const char *name,
 185                         int type,
 186                         uint16 nb_flags,
 187                         int ttl,
 188                         enum name_source source,
 189                         int num_ips,
 190                         struct in_addr *iplist)
 191 {
 192         bool ret = False;
 193         struct name_record *namerec;
 194         time_t time_now = time(NULL);
 195
 196         if (num_ips == 0) {
 197                 return false;
 198         }
 199
 200         namerec = SMB_MALLOC_P(struct name_record);
 201         if( NULL == namerec ) {
 202                 DEBUG( 0, ( "add_name_to_subnet: malloc fail.\n" ) );
 203                 return False;
 204         }
 205
 206         memset( (char *)namerec, '\0', sizeof(*namerec) );
 207         namerec->data.ip = SMB_MALLOC_ARRAY( struct in_addr, num_ips );
 208         if( NULL == namerec->data.ip ) {
 209                 DEBUG( 0, ( "add_name_to_subnet: malloc fail when creating ip_flgs.\n" ) );
 210                 ZERO_STRUCTP(namerec);
 211                 SAFE_FREE(namerec);
 212                 return False;
 213         }
 214
 215         namerec->subnet = subrec;
 216
 217         make_nmb_name(&namerec->name, name, type);
 218         upcase_name(&namerec->name, NULL );
 219
 220         /* Enter the name as active. */
 221         namerec->data.nb_flags = nb_flags | NB_ACTIVE;
 222         namerec->data.wins_flags = WINS_ACTIVE;
 223
 224         /* If it's our primary name, flag it as so. */
 225         if (strequal( my_netbios_names(0), name )) {
 226                 namerec->data.nb_flags |= NB_PERM;
 227         }
 228
 229         /* Copy the IPs. */
 230         namerec->data.num_ips = num_ips;
 231         memcpy( (namerec->data.ip), iplist, num_ips * sizeof(struct in_addr) );
 232
 233         /* Data source. */
 234         namerec->data.source = source;
 235
 236         /* Setup the death_time and refresh_time. */
 237         if (ttl == PERMANENT_TTL) {
 238                 namerec->data.death_time = PERMANENT_TTL;
 239         } else {
 240                 namerec->data.death_time = time_now + ttl;
 241         }
 242
 243         namerec->data.refresh_time = time_now + MIN((ttl/2), MAX_REFRESH_TIME);
 244
 245         DEBUG( 3, ( "add_name_to_subnet: Added netbios name %s with first IP %s \
 246 ttl=%d nb_flags=%2x to subnet %s\n",
 247                 nmb_namestr( &namerec->name ),
 248                 inet_ntoa( *iplist ),
 249                 ttl,
 250                 (unsigned int)nb_flags,
 251                 subrec->subnet_name ) );
 252
 253         /* Now add the record to the name list. */
 254
 255         if (subrec == wins_server_subnet) {
 256                 ret = add_name_to_wins_subnet(namerec);
 257                 /* Free namerec - it's stored in the tdb. */
 258                 SAFE_FREE(namerec->data.ip);
 259                 SAFE_FREE(namerec);
 260         } else {
 261                 DLIST_ADD(subrec->namelist, namerec);
 262                 subrec->namelist_changed = True;
 263                 ret = True;
 264         }
 265
 266         return ret;
 267 }
 268
 269 /*******************************************************************
 270  Utility function automatically called when a name refresh or register
 271  succeeds. By definition this is a SELF_NAME (or we wouldn't be registering
 272  it).
 273  ******************************************************************/
 274
 275 void standard_success_register(struct subnet_record *subrec,
 276                              struct userdata_struct *userdata,
 277                              struct nmb_name *nmbname, uint16 nb_flags, int ttl,
 278                              struct in_addr registered_ip)
 279 {
 280         struct name_record *namerec;
 281
 282         namerec = find_name_on_subnet( subrec, nmbname, FIND_SELF_NAME);
 283         if (namerec == NULL) {
 284                 unstring name;
 285                 pull_ascii_nstring(name, sizeof(name), nmbname->name);
 286                 add_name_to_subnet( subrec, name, nmbname->name_type,
 287                         nb_flags, ttl, SELF_NAME, 1, &registered_ip );
 288         } else {
 289                 update_name_ttl( namerec, ttl );
 290         }
 291 }
 292
 293 /*******************************************************************
 294  Utility function automatically called when a name refresh or register
 295  fails. Note that this is only ever called on a broadcast subnet with
 296  one IP address per name. This is why it can just delete the name
 297  without enumerating the IP adresses. JRA.
 298  ******************************************************************/
 299
 300 void standard_fail_register( struct subnet_record   *subrec,
 301                              struct nmb_name        *nmbname )
 302 {
 303         struct name_record *namerec;
 304
 305         namerec = find_name_on_subnet( subrec, nmbname, FIND_SELF_NAME);
 306
 307         DEBUG( 0, ( "standard_fail_register: Failed to register/refresh name %s \
 308 on subnet %s\n", nmb_namestr(nmbname), subrec->subnet_name) );
 309
 310         /* Remove the name from the subnet. */
 311         if( namerec ) {
 312                 remove_name_from_namelist(subrec, namerec);
 313         }
 314 }
 315
 316 /*******************************************************************
 317  Utility function to remove an IP address from a name record.
 318  ******************************************************************/
 319
 320 static void remove_nth_ip_in_record( struct name_record *namerec, int ind)
 321 {
 322         if( ind != namerec->data.num_ips ) {
 323                 memmove( (char *)(&namerec->data.ip[ind]),
 324                                 (char *)(&namerec->data.ip[ind+1]),
 325                                 ( namerec->data.num_ips - ind - 1) * sizeof(struct in_addr) );
 326         }
 327
 328         namerec->data.num_ips--;
 329         if (namerec->subnet == wins_server_subnet) {
 330                 wins_store_changed_namerec(namerec);
 331         } else {
 332                 namerec->subnet->namelist_changed = True;
 333         }
 334 }
 335
 336 /*******************************************************************
 337  Utility function to check if an IP address exists in a name record.
 338  ******************************************************************/
 339
 340 bool find_ip_in_name_record( struct name_record *namerec, struct in_addr ip )
 341 {
 342         int i;
 343
 344         for(i = 0; i < namerec->data.num_ips; i++) {
 345                 if(ip_equal_v4( namerec->data.ip[i], ip)) {
 346                         return True;
 347                 }
 348         }
 349
 350         return False;
 351 }
 352
 353 /*******************************************************************
 354  Utility function to add an IP address to a name record.
 355  ******************************************************************/
 356
 357 void add_ip_to_name_record( struct name_record *namerec, struct in_addr new_ip )
 358 {
 359         struct in_addr *new_list;
 360
 361         /* Don't add one we already have. */
 362         if( find_ip_in_name_record( namerec, new_ip )) {
 363                 return;
 364         }
 365
 366         new_list = SMB_MALLOC_ARRAY( struct in_addr, namerec->data.num_ips + 1);
 367         if( NULL == new_list ) {
 368                 DEBUG(0,("add_ip_to_name_record: Malloc fail !\n"));
 369                 return;
 370         }
 371
 372         memcpy( (char *)new_list, (char *)namerec->data.ip, namerec->data.num_ips * sizeof(struct in_addr) );
 373         new_list[namerec->data.num_ips] = new_ip;
 374
 375         SAFE_FREE(namerec->data.ip);
 376         namerec->data.ip = new_list;
 377         namerec->data.num_ips += 1;
 378
 379         if (namerec->subnet == wins_server_subnet) {
 380                 wins_store_changed_namerec(namerec);
 381         } else {
 382                 namerec->subnet->namelist_changed = True;
 383         }
 384 }
 385
 386 /*******************************************************************
 387  Utility function to remove an IP address from a name record.
 388  ******************************************************************/
 389
 390 void remove_ip_from_name_record( struct name_record *namerec,
 391                                  struct in_addr      remove_ip )
 392 {
 393         /* Try and find the requested ip address - remove it. */
 394         int i;
 395         int orig_num = namerec->data.num_ips;
 396
 397         for(i = 0; i < orig_num; i++) {
 398                 if( ip_equal_v4( remove_ip, namerec->data.ip[i]) ) {
 399                         remove_nth_ip_in_record( namerec, i);
 400                         break;
 401                 }
 402         }
 403 }
 404
 405 /*******************************************************************
 406  Utility function that release_name callers can plug into as the
 407  success function when a name release is successful. Used to save
 408  duplication of success_function code.
 409  ******************************************************************/
 410
 411 void standard_success_release( struct subnet_record   *subrec,
 412                                struct userdata_struct *userdata,
 413                                struct nmb_name        *nmbname,
 414                                struct in_addr          released_ip )
 415 {
 416         struct name_record *namerec;
 417
 418         namerec = find_name_on_subnet( subrec, nmbname, FIND_ANY_NAME );
 419         if( namerec == NULL ) {
 420                 DEBUG( 0, ( "standard_success_release: Name release for name %s IP %s \
 421 on subnet %s. Name was not found on subnet.\n", nmb_namestr(nmbname), inet_ntoa(released_ip),
 422                                 subrec->subnet_name) );
 423                 return;
 424         } else {
 425                 int orig_num = namerec->data.num_ips;
 426
 427                 remove_ip_from_name_record( namerec, released_ip );
 428
 429                 if( namerec->data.num_ips == orig_num ) {
 430                         DEBUG( 0, ( "standard_success_release: Name release for name %s IP %s \
 431 on subnet %s. This ip is not known for this name.\n", nmb_namestr(nmbname), inet_ntoa(released_ip), subrec->subnet_name ) );
 432                 }
 433         }
 434
 435         if( namerec->data.num_ips == 0 ) {
 436                 remove_name_from_namelist( subrec, namerec );
 437         }
 438 }
 439
 440 /*******************************************************************
 441  Expires old names in a subnet namelist.
 442  NB. Does not touch the wins_subnet - no wins specific processing here.
 443 ******************************************************************/
 444
 445 static void expire_names_on_subnet(struct subnet_record *subrec, time_t t)
 446 {
 447         struct name_record *namerec;
 448         struct name_record *next_namerec;
 449
 450         for( namerec = subrec->namelist; namerec; namerec = next_namerec ) {
 451                 next_namerec = namerec->next;
 452                 if( (namerec->data.death_time != PERMANENT_TTL) && (namerec->data.death_time < t) ) {
 453                         if( namerec->data.source == SELF_NAME ) {
 454                                 DEBUG( 3, ( "expire_names_on_subnet: Subnet %s not expiring SELF \
 455 name %s\n", subrec->subnet_name, nmb_namestr(&namerec->name) ) );
 456                                 namerec->data.death_time += 300;
 457                                 namerec->subnet->namelist_changed = True;
 458                                 continue;
 459                         }
 460
 461                         DEBUG(3,("expire_names_on_subnet: Subnet %s - removing expired name %s\n",
 462                                 subrec->subnet_name, nmb_namestr(&namerec->name)));
 463
 464                         remove_name_from_namelist(subrec, namerec );
 465                 }
 466         }
 467 }
 468
 469 /*******************************************************************
 470  Expires old names in all subnet namelists.
 471  NB. Does not touch the wins_subnet.
 472 ******************************************************************/
 473
 474 void expire_names(time_t t)
 475 {
 476         struct subnet_record *subrec;
 477
 478         for( subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec) ) {
 479                 expire_names_on_subnet( subrec, t );
 480         }
 481 }
 482
 483 /****************************************************************************
 484   Add the magic samba names, useful for finding samba servers.
 485   These go directly into the name list for a particular subnet,
 486   without going through the normal registration process.
 487   When adding them to the unicast subnet, add them as a list of
 488   all broadcast subnet IP addresses.
 489 **************************************************************************/
 490
 491 void add_samba_names_to_subnet( struct subnet_record *subrec )
 492 {
 493         struct in_addr *iplist = &subrec->myip;
 494         int num_ips = 1;
 495
 496         /* These names are added permanently (ttl of zero) and will NOT be refreshed.  */
 497
 498         if( (subrec == unicast_subnet) || (subrec == wins_server_subnet) || (subrec == remote_broadcast_subnet) ) {
 499                 struct subnet_record *bcast_subrecs;
 500                 int i;
 501
 502                 /* Create an IP list containing all our known subnets. */
 503
 504                 num_ips = iface_count();
 505                 iplist = SMB_MALLOC_ARRAY( struct in_addr, num_ips);
 506                 if( NULL == iplist ) {
 507                         DEBUG(0,("add_samba_names_to_subnet: Malloc fail !\n"));
 508                         return;
 509                 }
 510
 511                 for( bcast_subrecs = FIRST_SUBNET, i = 0; bcast_subrecs &&
 512                                 i < num_ips;
 513                                 bcast_subrecs = NEXT_SUBNET_EXCLUDING_UNICAST(bcast_subrecs), i++ ) {
 514                         iplist[i] = bcast_subrecs->myip;
 515                 }
 516                 num_ips = i;
 517         }
 518
 519         add_name_to_subnet(subrec,"*",0x0,samba_nb_type, PERMANENT_TTL,
 520                                 PERMANENT_NAME, num_ips, iplist);
 521         add_name_to_subnet(subrec,"*",0x20,samba_nb_type,PERMANENT_TTL,
 522                                 PERMANENT_NAME, num_ips, iplist);
 523         add_name_to_subnet(subrec,"__SAMBA__",0x20,samba_nb_type,PERMANENT_TTL,
 524                                 PERMANENT_NAME, num_ips, iplist);
 525         add_name_to_subnet(subrec,"__SAMBA__",0x00,samba_nb_type,PERMANENT_TTL,
 526                                 PERMANENT_NAME, num_ips, iplist);
 527
 528         if(iplist != &subrec->myip) {
 529                 SAFE_FREE(iplist);
 530         }
 531 }
 532
 533 /****************************************************************************
 534  Dump a name_record struct.
 535 **************************************************************************/
 536
 537 void dump_name_record( struct name_record *namerec, XFILE *fp)
 538 {
 539         const char *src_type;
 540         struct tm *tm;
 541         int i;
 542
 543         x_fprintf(fp,"\tName = %s\t", nmb_namestr(&namerec->name));
 544         switch(namerec->data.source) {
 545                 case LMHOSTS_NAME:
 546                         src_type = "LMHOSTS_NAME";
 547                         break;
 548                 case WINS_PROXY_NAME:
 549                         src_type = "WINS_PROXY_NAME";
 550                         break;
 551                 case REGISTER_NAME:
 552                         src_type = "REGISTER_NAME";
 553                         break;
 554                 case SELF_NAME:
 555                         src_type = "SELF_NAME";
 556                         break;
 557                 case DNS_NAME:
 558                         src_type = "DNS_NAME";
 559                         break;
 560                 case DNSFAIL_NAME:
 561                         src_type = "DNSFAIL_NAME";
 562                         break;
 563                 case PERMANENT_NAME:
 564                         src_type = "PERMANENT_NAME";
 565                         break;
 566                 default:
 567                         src_type = "unknown!";
 568                         break;
 569         }
 570
 571         x_fprintf(fp,"Source = %s\nb_flags = %x\t", src_type, namerec->data.nb_flags);
 572
 573         if(namerec->data.death_time != PERMANENT_TTL) {
 574                 const char *asct;
 575                 tm = localtime(&namerec->data.death_time);
 576                 if (!tm) {
 577                         return;
 578                 }
 579                 asct = asctime(tm);
 580                 if (!asct) {
 581                         return;
 582                 }
 583                 x_fprintf(fp, "death_time = %s\t", asct);
 584         } else {
 585                 x_fprintf(fp, "death_time = PERMANENT\t");
 586         }
 587
 588         if(namerec->data.refresh_time != PERMANENT_TTL) {
 589                 const char *asct;
 590                 tm = localtime(&namerec->data.refresh_time);
 591                 if (!tm) {
 592                         return;
 593                 }
 594                 asct = asctime(tm);
 595                 if (!asct) {
 596                         return;
 597                 }
 598                 x_fprintf(fp, "refresh_time = %s\n", asct);
 599         } else {
 600                 x_fprintf(fp, "refresh_time = PERMANENT\n");
 601         }
 602
 603         x_fprintf(fp, "\t\tnumber of IPS = %d", namerec->data.num_ips);
 604         for(i = 0; i < namerec->data.num_ips; i++) {
 605                 x_fprintf(fp, "\t%s", inet_ntoa(namerec->data.ip[i]));
 606         }
 607
 608         x_fprintf(fp, "\n\n");
 609
 610 }
 611
 612 /****************************************************************************
 613  Dump the contents of the namelists on all the subnets (including unicast)
 614  into a file. Initiated by SIGHUP - used to debug the state of the namelists.
 615 **************************************************************************/
 616
 617 static void dump_subnet_namelist( struct subnet_record *subrec, XFILE *fp)
 618 {
 619         struct name_record *namerec;
 620         x_fprintf(fp, "Subnet %s\n----------------------\n", subrec->subnet_name);
 621         for( namerec = subrec->namelist; namerec; namerec = namerec->next) {
 622                 dump_name_record(namerec, fp);
 623         }
 624 }
 625
 626 /****************************************************************************
 627  Dump the contents of the namelists on all the subnets (including unicast)
 628  into a file. Initiated by SIGHUP - used to debug the state of the namelists.
 629 **************************************************************************/
 630
 631 void dump_all_namelists(void)
 632 {
 633         XFILE *fp;
 634         struct subnet_record *subrec;
 635
 636         fp = x_fopen(lock_path("namelist.debug"),O_WRONLY|O_CREAT|O_TRUNC, 0644);
 637
 638         if (!fp) {
 639                 DEBUG(0,("dump_all_namelists: Can't open file %s. Error was %s\n",
 640                         "namelist.debug",strerror(errno)));
 641                 return;
 642         }
 643
 644         for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
 645                 dump_subnet_namelist( subrec, fp );
 646         }
 647
 648         if (!we_are_a_wins_client()) {
 649                 dump_subnet_namelist( unicast_subnet, fp );
 650         }
 651
 652         if (remote_broadcast_subnet->namelist != NULL) {
 653                 dump_subnet_namelist( remote_broadcast_subnet, fp );
 654         }
 655
 656         if (wins_server_subnet != NULL) {
 657                 dump_wins_subnet_namelist(fp );
 658         }
 659
 660         x_fclose( fp );
 661 }