source/nmbd/nmbd_lmhosts.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    NBT netbios routines and daemon - version 2
   4    Copyright (C) Jeremy Allison 1994-1998
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program 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
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19
  20    Revision History:
  21
  22    Handle lmhosts file reading.
  23
  24 */
  25
  26 #include "includes.h"
  27
  28 /****************************************************************************
  29 Load a lmhosts file.
  30 ****************************************************************************/
  31
  32 void load_lmhosts_file(char *fname)
  33 {
  34         pstring name;
  35         int name_type;
  36         struct in_addr ipaddr;
  37         XFILE *fp = startlmhosts( fname );
  38
  39         if (!fp) {
  40                 DEBUG(2,("load_lmhosts_file: Can't open lmhosts file %s. Error was %s\n",
  41                         fname, strerror(errno)));
  42                 return;
  43         }
  44
  45         while (getlmhostsent(fp, name, &name_type, &ipaddr) ) {
  46                 struct subnet_record *subrec = NULL;
  47                 enum name_source source = LMHOSTS_NAME;
  48
  49                 /* We find a relevent subnet to put this entry on, then add it. */
  50                 /* Go through all the broadcast subnets and see if the mask matches. */
  51                 for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
  52                         if(same_net(ipaddr, subrec->bcast_ip, subrec->mask_ip))
  53                                 break;
  54                 }
  55
  56                 /* If none match add the name to the remote_broadcast_subnet. */
  57                 if(subrec == NULL)
  58                         subrec = remote_broadcast_subnet;
  59
  60                 if(name_type == -1) {
  61                         /* Add the (0) and (0x20) names directly into the namelist for this subnet. */
  62                         (void)add_name_to_subnet(subrec,name,0x00,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
  63                         (void)add_name_to_subnet(subrec,name,0x20,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
  64                 } else {
  65                         /* Add the given name type to the subnet namelist. */
  66                         (void)add_name_to_subnet(subrec,name,name_type,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
  67                 }
  68         }
  69
  70         endlmhosts(fp);
  71 }
  72
  73 /****************************************************************************
  74   Find a name read from the lmhosts file. We secretly check the names on
  75   the remote_broadcast_subnet as if the name was added to a regular broadcast
  76   subnet it will be found by normal name query processing.
  77 ****************************************************************************/
  78
  79 BOOL find_name_in_lmhosts(struct nmb_name *nmbname, struct name_record **namerecp)
  80 {
  81         struct name_record *namerec;
  82
  83         *namerecp = NULL;
  84
  85         if((namerec = find_name_on_subnet(remote_broadcast_subnet, nmbname, FIND_ANY_NAME))==NULL)
  86                 return False;
  87
  88         if(!NAME_IS_ACTIVE(namerec) || (namerec->data.source != LMHOSTS_NAME))
  89                 return False;
  90
  91         *namerecp = namerec;
  92         return True;
  93 }