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 "system/filesys.h"
  25 #include "nmbd/nmbd.h"
  26
  27 uint16 samba_nb_type = 0; /* samba's NetBIOS name type */
  28
  29
  30 /**************************************************************************
  31  Set Samba's NetBIOS name type.
  32 ***************************************************************************/
  33
  34 void set_samba_nb_type(void)
  35 {
  36         if( lp_we_are_a_wins_server() || wins_srv_count() ) {
  37                 samba_nb_type = NB_HFLAG;               /* samba is a 'hybrid' node type. */
  38         } else {
  39                 samba_nb_type = NB_BFLAG;           /* samba is broadcast-only node type. */
  40         }
  41 }
  42
  43 /***************************************************************************
  44  Convert a NetBIOS name to upper case.
  45 ***************************************************************************/
  46
  47 static void upcase_name( struct nmb_name *target, const struct nmb_name *source )
  48 {
  49         int i;
  50         unstring targ;
  51         fstring scope;
  52
  53         if( NULL != source ) {
  54                 memcpy( target, source, sizeof( struct nmb_name ) );
  55         }
  56
  57         pull_ascii_nstring(targ, sizeof(targ), target->name);
  58         strupper_m( targ );
  59         push_ascii_nstring( target->name, targ);
  60
  61         pull_ascii(scope, target->scope, 64, -1, STR_TERMINATE);
  62         strupper_m( scope );
  63         push_ascii(target->scope, scope, 64, STR_TERMINATE);
  64
  65         /* fudge... We're using a byte-by-byte compare, so we must be sure that
  66          * unused space doesn't have garbage in it.
  67          */
  68
  69         for( i = strlen( target->name ); i < sizeof( target->name ); i++ ) {
  70                 target->name[i] = '\0';
  71         }
  72         for( i = strlen( target->scope ); i < sizeof( target->scope ); i++ ) {
  73                 target->scope[i] = '\0';
  74         }
  75 }
  76
  77 /**************************************************************************
  78  Remove a name from the namelist.
  79 ***************************************************************************/
  80
  81 void remove_name_from_namelist(struct subnet_record *subrec,
  82                                 struct name_record *namerec )
  83 {
  84         if (subrec == wins_server_subnet)
  85                 remove_name_from_wins_namelist(namerec);
  86         else {
  87                 subrec->namelist_changed = True;
  88                 DLIST_REMOVE(subrec->namelist, namerec);
  89         }
  90
  91         SAFE_FREE(namerec->data.ip);
  92         ZERO_STRUCTP(namerec);
  93         SAFE_FREE(namerec);
  94 }
  95
  96 /**************************************************************************
  97  Find a name in a subnet.
  98 **************************************************************************/
  99
 100 struct name_record *find_name_on_subnet(struct subnet_record *subrec,
 101                                 const struct nmb_name *nmbname,
 102                                 bool self_only)
 103 {
 104         struct nmb_name uc_name;
 105         struct name_record *name_ret;
 106
 107         upcase_name( &uc_name, nmbname );
 108
 109         if (subrec == wins_server_subnet) {
 110                 return find_name_on_wins_subnet(&uc_name, self_only);
 111         }
 112
 113         for( name_ret = subrec->namelist; name_ret; name_ret = name_ret->next) {
 114                 if (memcmp(&uc_name, &name_ret->name, sizeof(struct nmb_name)) == 0) {
 115                         break;
 116                 }
 117         }
 118
 119         if( name_ret ) {
 120                 /* Self names only - these include permanent names. */
 121                 if( self_only && (name_ret->data.source != SELF_NAME) && (name_ret->data.source != PERMANENT_NAME) ) {
 122                         DEBUG( 9, ( "find_name_on_subnet: on subnet %s - self name %s NOT FOUND\n",
 123                                                 subrec->subnet_name, nmb_namestr(nmbname) ) );
 124                         return NULL;
 125                 }
 126
 127                 DEBUG( 9, ("find_name_on_subnet: on subnet %s - found name %s source=%d\n",
 128                         subrec->subnet_name, nmb_namestr(nmbname), name_ret->data.source) );
 129
 130                 return name_ret;
 131         }
 132
 133         DEBUG( 9, ( "find_name_on_subnet: on subnet %s - name %s NOT FOUND\n",
 134                 subrec->subnet_name, nmb_namestr(nmbname) ) );
 135
 136         return NULL;
 137 }
 138
 139 /**************************************************************************
 140  Find a name over all known broadcast subnets.
 141 ************************************************************************/
 142
 143 struct name_record *find_name_for_remote_broadcast_subnet(struct nmb_name *nmbname,
 144                                                 bool self_only)
 145 {
 146         struct subnet_record *subrec;
 147         struct name_record *namerec;
 148
 149         for( subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec) ) {
 150                 namerec = find_name_on_subnet(subrec, nmbname, self_only);
 151                 if (namerec) {
 152                         return namerec;
 153                 }
 154         }
 155
 156         return NULL;
 157 }
 158
 159 /**************************************************************************
 160  Update the ttl of an entry in a subnet name list.
 161 ***************************************************************************/
 162
 163 void update_name_ttl( struct name_record *namerec, int ttl )
 164 {
 165         time_t time_now = time(NULL);
 166
 167         if( namerec->data.death_time != PERMANENT_TTL) {
 168                 namerec->data.death_time = time_now + ttl;
 169         }
 170
 171         namerec->data.refresh_time = time_now + MIN((ttl/2), MAX_REFRESH_TIME);
 172
 173         if (namerec->subnet == wins_server_subnet) {
 174                 wins_store_changed_namerec(namerec);
 175         } else {
 176                 namerec->subnet->namelist_changed = True;
 177         }
 178 }
 179
 180 /**************************************************************************
 181  Add an entry to a subnet name list.
 182 ***********************************************************************/
 183
 184 bool add_name_to_subnet( struct subnet_record *subrec,
 185                         const char *name,
 186                         int type,
 187                         uint16 nb_flags,
 188                         int ttl,
 189                         enum name_source source,
 190                         int num_ips,
 191                         struct in_addr *iplist)
 192 {
 193         bool ret = False;
 194         struct name_record *namerec;
 195         time_t time_now = time(NULL);
 196
 197         if (num_ips == 0) {
 198                 return false;
 199         }
 200
 201         namerec = SMB_MALLOC_P(struct name_record);
 202         if( NULL == namerec ) {
 203                 DEBUG( 0, ( "add_name_to_subnet: malloc fail.\n" ) );
 204                 return False;
 205         }
 206
 207         memset( (char *)namerec, '\0', sizeof(*namerec) );
 208         namerec->data.ip = SMB_MALLOC_ARRAY( struct in_addr, num_ips );
 209         if( NULL == namerec->data.ip ) {
 210                 DEBUG( 0, ( "add_name_to_subnet: malloc fail when creating ip_flgs.\n" ) );
 211                 ZERO_STRUCTP(namerec);
 212                 SAFE_FREE(namerec);
 213                 return False;
 214         }
 215
 216         namerec->subnet = subrec;
 217
 218         make_nmb_name(&namerec->name, name, type);
 219         upcase_name(&namerec->name, NULL );
 220
 221         /* Enter the name as active. */
 222         namerec->data.nb_flags = nb_flags | NB_ACTIVE;
 223         namerec->data.wins_flags = WINS_ACTIVE;
 224
 225         /* If it's our primary name, flag it as so. */
 226         if (strequal( my_netbios_names(0), name )) {
 227                 namerec->data.nb_flags |= NB_PERM;
 228         }
 229
 230         /* Copy the IPs. */
 231         namerec->data.num_ips = num_ips;
 232         memcpy( (namerec->data.ip), iplist, num_ips * sizeof(struct in_addr) );
 233
 234         /* Data source. */
 235         namerec->data.source = source;
 236
 237         /* Setup the death_time and refresh_time. */
 238         if (ttl == PERMANENT_TTL) {
 239                 namerec->data.death_time = PERMANENT_TTL;
 240         } else {
 241                 namerec->data.death_time = time_now + ttl;
 242         }
 243
 244         namerec->data.refresh_time = time_now + MIN((ttl/2), MAX_REFRESH_TIME);
 245
 246         DEBUG( 3, ( "add_name_to_subnet: Added netbios name %s with first IP %s \
 247 ttl=%d nb_flags=%2x to subnet %s\n",
 248                 nmb_namestr( &namerec->name ),
 249                 inet_ntoa( *iplist ),
 250                 ttl,
 251                 (unsigned int)nb_flags,
 252                 subrec->subnet_name ) );
 253
 254         /* Now add the record to the name list. */
 255
 256         if (subrec == wins_server_subnet) {
 257                 ret = add_name_to_wins_subnet(namerec);
 258                 /* Free namerec - it's stored in the tdb. */
 259                 SAFE_FREE(namerec->data.ip);
 260                 SAFE_FREE(namerec);
 261         } else {
 262                 DLIST_ADD(subrec->namelist, namerec);
 263                 subrec->namelist_changed = True;
 264                 ret = True;
 265         }
 266
 267         return ret;
 268 }
 269
 270 /*******************************************************************
 271  Utility function automatically called when a name refresh or register
 272  succeeds. By definition this is a SELF_NAME (or we wouldn't be registering
 273  it).
 274  ******************************************************************/
 275
 276 void standard_success_register(struct subnet_record *subrec,
 277                              struct userdata_struct *userdata,
 278                              struct nmb_name *nmbname, uint16 nb_flags, int ttl,
 279                              struct in_addr registered_ip)
 280 {
 281         struct name_record *namerec;
 282
 283         namerec = find_name_on_subnet( subrec, nmbname, FIND_SELF_NAME);
 284         if (namerec == NULL) {
 285                 unstring name;
 286                 pull_ascii_nstring(name, sizeof(name), nmbname->name);
 287                 add_name_to_subnet( subrec, name, nmbname->name_type,
 288                         nb_flags, ttl, SELF_NAME, 1, &registered_ip );
 289         } else {
 290                 update_name_ttl( namerec, ttl );
 291         }
 292 }
 293
 294 /*******************************************************************
 295  Utility function automatically called when a name refresh or register
 296  fails. Note that this is only ever called on a broadcast subnet with
 297  one IP address per name. This is why it can just delete the name
 298  without enumerating the IP adresses. JRA.
 299  ******************************************************************/
 300
 301 void standard_fail_register( struct subnet_record   *subrec,
 302                              struct nmb_name        *nmbname )
 303 {
 304         struct name_record *namerec;
 305
 306         namerec = find_name_on_subnet( subrec, nmbname, FIND_SELF_NAME);
 307
 308         DEBUG( 0, ( "standard_fail_register: Failed to register/refresh name %s \
 309 on subnet %s\n", nmb_namestr(nmbname), subrec->subnet_name) );
 310
 311         /* Remove the name from the subnet. */
 312         if( namerec ) {
 313                 remove_name_from_namelist(subrec, namerec);
 314         }
 315 }
 316
 317 /*******************************************************************
 318  Utility function to remove an IP address from a name record.
 319  ******************************************************************/
 320
 321 static void remove_nth_ip_in_record( struct name_record *namerec, int ind)
 322 {
 323         if( ind != namerec->data.num_ips ) {
 324                 memmove( (char *)(&namerec->data.ip[ind]),
 325                                 (char *)(&namerec->data.ip[ind+1]),
 326                                 ( namerec->data.num_ips - ind - 1) * sizeof(struct in_addr) );
 327         }
 328
 329         namerec->data.num_ips--;
 330         if (namerec->subnet == wins_server_subnet) {
 331                 wins_store_changed_namerec(namerec);
 332         } else {
 333                 namerec->subnet->namelist_changed = True;
 334         }
 335 }
 336
 337 /*******************************************************************
 338  Utility function to check if an IP address exists in a name record.
 339  ******************************************************************/
 340
 341 bool find_ip_in_name_record( struct name_record *namerec, struct in_addr ip )
 342 {
 343         int i;
 344
 345         for(i = 0; i < namerec->data.num_ips; i++) {
 346                 if(ip_equal_v4( namerec->data.ip[i], ip)) {
 347                         return True;
 348                 }
 349         }
 350
 351         return False;
 352 }
 353
 354 /*******************************************************************
 355  Utility function to add an IP address to a name record.
 356  ******************************************************************/
 357
 358 void add_ip_to_name_record( struct name_record *namerec, struct in_addr new_ip )
 359 {
 360         struct in_addr *new_list;
 361
 362         /* Don't add one we already have. */
 363         if( find_ip_in_name_record( namerec, new_ip )) {
 364                 return;
 365         }
 366
 367         new_list = SMB_MALLOC_ARRAY( struct in_addr, namerec->data.num_ips + 1);
 368         if( NULL == new_list ) {
 369                 DEBUG(0,("add_ip_to_name_record: Malloc fail !\n"));
 370                 return;
 371         }
 372
 373         memcpy( (char *)new_list, (char *)namerec->data.ip, namerec->data.num_ips * sizeof(struct in_addr) );
 374         new_list[namerec->data.num_ips] = new_ip;
 375
 376         SAFE_FREE(namerec->data.ip);
 377         namerec->data.ip = new_list;
 378         namerec->data.num_ips += 1;
 379
 380         if (namerec->subnet == wins_server_subnet) {
 381                 wins_store_changed_namerec(namerec);
 382         } else {
 383                 namerec->subnet->namelist_changed = True;
 384         }
 385 }
 386
 387 /*******************************************************************
 388  Utility function to remove an IP address from a name record.
 389  ******************************************************************/
 390
 391 void remove_ip_from_name_record( struct name_record *namerec,
 392                                  struct in_addr      remove_ip )
 393 {
 394         /* Try and find the requested ip address - remove it. */
 395         int i;
 396         int orig_num = namerec->data.num_ips;
 397
 398         for(i = 0; i < orig_num; i++) {
 399                 if( ip_equal_v4( remove_ip, namerec->data.ip[i]) ) {
 400                         remove_nth_ip_in_record( namerec, i);
 401                         break;
 402                 }
 403         }
 404 }
 405
 406 /*******************************************************************
 407  Utility function that release_name callers can plug into as the
 408  success function when a name release is successful. Used to save
 409  duplication of success_function code.
 410  ******************************************************************/
 411
 412 void standard_success_release( struct subnet_record   *subrec,
 413                                struct userdata_struct *userdata,
 414                                struct nmb_name        *nmbname,
 415                                struct in_addr          released_ip )
 416 {
 417         struct name_record *namerec;
 418
 419         namerec = find_name_on_subnet( subrec, nmbname, FIND_ANY_NAME );
 420         if( namerec == NULL ) {
 421                 DEBUG( 0, ( "standard_success_release: Name release for name %s IP %s \
 422 on subnet %s. Name was not found on subnet.\n", nmb_namestr(nmbname), inet_ntoa(released_ip),
 423                                 subrec->subnet_name) );
 424                 return;
 425         } else {
 426                 int orig_num = namerec->data.num_ips;
 427
 428                 remove_ip_from_name_record( namerec, released_ip );
 429
 430                 if( namerec->data.num_ips == orig_num ) {
 431                         DEBUG( 0, ( "standard_success_release: Name release for name %s IP %s \
 432 on subnet %s. This ip is not known for this name.\n", nmb_namestr(nmbname), inet_ntoa(released_ip), subrec->subnet_name ) );
 433                 }
 434         }
 435
 436         if( namerec->data.num_ips == 0 ) {
 437                 remove_name_from_namelist( subrec, namerec );
 438         }
 439 }
 440
 441 /*******************************************************************
 442  Expires old names in a subnet namelist.
 443  NB. Does not touch the wins_subnet - no wins specific processing here.
 444 ******************************************************************/
 445
 446 static void expire_names_on_subnet(struct subnet_record *subrec, time_t t)
 447 {
 448         struct name_record *namerec;
 449         struct name_record *next_namerec;
 450
 451         for( namerec = subrec->namelist; namerec; namerec = next_namerec ) {
 452                 next_namerec = namerec->next;
 453                 if( (namerec->data.death_time != PERMANENT_TTL) && (namerec->data.death_time < t) ) {
 454                         if( namerec->data.source == SELF_NAME ) {
 455                                 DEBUG( 3, ( "expire_names_on_subnet: Subnet %s not expiring SELF \
 456 name %s\n", subrec->subnet_name, nmb_namestr(&namerec->name) ) );
 457                                 namerec->data.death_time += 300;
 458                                 namerec->subnet->namelist_changed = True;
 459                                 continue;
 460                         }
 461
 462                         DEBUG(3,("expire_names_on_subnet: Subnet %s - removing expired name %s\n",
 463                                 subrec->subnet_name, nmb_namestr(&namerec->name)));
 464
 465                         remove_name_from_namelist(subrec, namerec );
 466                 }
 467         }
 468 }
 469
 470 /*******************************************************************
 471  Expires old names in all subnet namelists.
 472  NB. Does not touch the wins_subnet.
 473 ******************************************************************/
 474
 475 void expire_names(time_t t)
 476 {
 477         struct subnet_record *subrec;
 478
 479         for( subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec) ) {
 480                 expire_names_on_subnet( subrec, t );
 481         }
 482 }
 483
 484 /****************************************************************************
 485   Add the magic samba names, useful for finding samba servers.
 486   These go directly into the name list for a particular subnet,
 487   without going through the normal registration process.
 488   When adding them to the unicast subnet, add them as a list of
 489   all broadcast subnet IP addresses.
 490 **************************************************************************/
 491
 492 void add_samba_names_to_subnet( struct subnet_record *subrec )
 493 {
 494         struct in_addr *iplist = &subrec->myip;
 495         int num_ips = 1;
 496
 497         /* These names are added permanently (ttl of zero) and will NOT be refreshed.  */
 498
 499         if( (subrec == unicast_subnet) || (subrec == wins_server_subnet) || (subrec == remote_broadcast_subnet) ) {
 500                 struct subnet_record *bcast_subrecs;
 501                 int i;
 502
 503                 /* Create an IP list containing all our known subnets. */
 504
 505                 num_ips = iface_count();
 506                 iplist = SMB_MALLOC_ARRAY( struct in_addr, num_ips);
 507                 if( NULL == iplist ) {
 508                         DEBUG(0,("add_samba_names_to_subnet: Malloc fail !\n"));
 509                         return;
 510                 }
 511
 512                 for( bcast_subrecs = FIRST_SUBNET, i = 0; bcast_subrecs &&
 513                                 i < num_ips;
 514                                 bcast_subrecs = NEXT_SUBNET_EXCLUDING_UNICAST(bcast_subrecs), i++ ) {
 515                         iplist[i] = bcast_subrecs->myip;
 516                 }
 517                 num_ips = i;
 518         }
 519
 520         add_name_to_subnet(subrec,"*",0x0,samba_nb_type, PERMANENT_TTL,
 521                                 PERMANENT_NAME, num_ips, iplist);
 522         add_name_to_subnet(subrec,"*",0x20,samba_nb_type,PERMANENT_TTL,
 523                                 PERMANENT_NAME, num_ips, iplist);
 524         add_name_to_subnet(subrec,"__SAMBA__",0x20,samba_nb_type,PERMANENT_TTL,
 525                                 PERMANENT_NAME, num_ips, iplist);
 526         add_name_to_subnet(subrec,"__SAMBA__",0x00,samba_nb_type,PERMANENT_TTL,
 527                                 PERMANENT_NAME, num_ips, iplist);
 528
 529         if(iplist != &subrec->myip) {
 530                 SAFE_FREE(iplist);
 531         }
 532 }
 533
 534 /****************************************************************************
 535  Dump a name_record struct.
 536 **************************************************************************/
 537
 538 void dump_name_record( struct name_record *namerec, XFILE *fp)
 539 {
 540         const char *src_type;
 541         struct tm *tm;
 542         int i;
 543
 544         x_fprintf(fp,"\tName = %s\t", nmb_namestr(&namerec->name));
 545         switch(namerec->data.source) {
 546                 case LMHOSTS_NAME:
 547                         src_type = "LMHOSTS_NAME";
 548                         break;
 549                 case WINS_PROXY_NAME:
 550                         src_type = "WINS_PROXY_NAME";
 551                         break;
 552                 case REGISTER_NAME:
 553                         src_type = "REGISTER_NAME";
 554                         break;
 555                 case SELF_NAME:
 556                         src_type = "SELF_NAME";
 557                         break;
 558                 case DNS_NAME:
 559                         src_type = "DNS_NAME";
 560                         break;
 561                 case DNSFAIL_NAME:
 562                         src_type = "DNSFAIL_NAME";
 563                         break;
 564                 case PERMANENT_NAME:
 565                         src_type = "PERMANENT_NAME";
 566                         break;
 567                 default:
 568                         src_type = "unknown!";
 569                         break;
 570         }
 571
 572         x_fprintf(fp,"Source = %s\nb_flags = %x\t", src_type, namerec->data.nb_flags);
 573
 574         if(namerec->data.death_time != PERMANENT_TTL) {
 575                 const char *asct;
 576                 tm = localtime(&namerec->data.death_time);
 577                 if (!tm) {
 578                         return;
 579                 }
 580                 asct = asctime(tm);
 581                 if (!asct) {
 582                         return;
 583                 }
 584                 x_fprintf(fp, "death_time = %s\t", asct);
 585         } else {
 586                 x_fprintf(fp, "death_time = PERMANENT\t");
 587         }
 588
 589         if(namerec->data.refresh_time != PERMANENT_TTL) {
 590                 const char *asct;
 591                 tm = localtime(&namerec->data.refresh_time);
 592                 if (!tm) {
 593                         return;
 594                 }
 595                 asct = asctime(tm);
 596                 if (!asct) {
 597                         return;
 598                 }
 599                 x_fprintf(fp, "refresh_time = %s\n", asct);
 600         } else {
 601                 x_fprintf(fp, "refresh_time = PERMANENT\n");
 602         }
 603
 604         x_fprintf(fp, "\t\tnumber of IPS = %d", namerec->data.num_ips);
 605         for(i = 0; i < namerec->data.num_ips; i++) {
 606                 x_fprintf(fp, "\t%s", inet_ntoa(namerec->data.ip[i]));
 607         }
 608
 609         x_fprintf(fp, "\n\n");
 610
 611 }
 612
 613 /****************************************************************************
 614  Dump the contents of the namelists on all the subnets (including unicast)
 615  into a file. Initiated by SIGHUP - used to debug the state of the namelists.
 616 **************************************************************************/
 617
 618 static void dump_subnet_namelist( struct subnet_record *subrec, XFILE *fp)
 619 {
 620         struct name_record *namerec;
 621         x_fprintf(fp, "Subnet %s\n----------------------\n", subrec->subnet_name);
 622         for( namerec = subrec->namelist; namerec; namerec = namerec->next) {
 623                 dump_name_record(namerec, fp);
 624         }
 625 }
 626
 627 /****************************************************************************
 628  Dump the contents of the namelists on all the subnets (including unicast)
 629  into a file. Initiated by SIGHUP - used to debug the state of the namelists.
 630 **************************************************************************/
 631
 632 void dump_all_namelists(void)
 633 {
 634         XFILE *fp;
 635         struct subnet_record *subrec;
 636
 637         fp = x_fopen(lock_path("namelist.debug"),O_WRONLY|O_CREAT|O_TRUNC, 0644);
 638
 639         if (!fp) {
 640                 DEBUG(0,("dump_all_namelists: Can't open file %s. Error was %s\n",
 641                         "namelist.debug",strerror(errno)));
 642                 return;
 643         }
 644
 645         for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
 646                 dump_subnet_namelist( subrec, fp );
 647         }
 648
 649         if (!we_are_a_wins_client()) {
 650                 dump_subnet_namelist( unicast_subnet, fp );
 651         }
 652
 653         if (remote_broadcast_subnet->namelist != NULL) {
 654                 dump_subnet_namelist( remote_broadcast_subnet, fp );
 655         }
 656
 657         if (wins_server_subnet != NULL) {
 658                 dump_wins_subnet_namelist(fp );
 659         }
 660
 661         x_fclose( fp );
 662 }