source/nmbd/nmbd_lmhosts.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    NBT netbios routines and daemon - version 2
   5    Copyright (C) Jeremy Allison 1994-1998
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21    Revision History:
  22
  23    Handle lmhosts file reading.
  24
  25 */
  26
  27 #include "includes.h"
  28
  29 /****************************************************************************
  30 Load a lmhosts file.
  31 ****************************************************************************/
  32 void load_lmhosts_file(char *fname)
  33 {
  34   pstring name;
  35   int name_type;
  36   struct in_addr ipaddr;
  37   FILE *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   {
  47     struct subnet_record *subrec = NULL;
  48     enum name_source source = LMHOSTS_NAME;
  49
  50     /* We find a relevent subnet to put this entry on, then add it. */
  51     /* Go through all the broadcast subnets and see if the mask matches. */
  52     for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec))
  53     {
  54       if(same_net(ipaddr, subrec->bcast_ip, subrec->mask_ip))
  55         break;
  56     }
  57
  58     /* If none match add the name to the remote_broadcast_subnet. */
  59     if(subrec == NULL)
  60       subrec = remote_broadcast_subnet;
  61
  62     if(name_type == -1)
  63     {
  64       /* Add the (0) and (0x20) names directly into the namelist for this subnet. */
  65       (void)add_name_to_subnet(subrec,name,0x00,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
  66       (void)add_name_to_subnet(subrec,name,0x20,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
  67     }
  68     else
  69     {
  70       /* Add the given name type to the subnet namelist. */
  71       (void)add_name_to_subnet(subrec,name,name_type,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
  72     }
  73   }
  74
  75   endlmhosts(fp);
  76 }
  77
  78 /****************************************************************************
  79   Find a name read from the lmhosts file. We secretly check the names on
  80   the remote_broadcast_subnet as if the name was added to a regular broadcast
  81   subnet it will be found by normal name query processing.
  82 ****************************************************************************/
  83
  84 BOOL find_name_in_lmhosts(struct nmb_name *nmbname, struct name_record **namerecp)
  85 {
  86   struct name_record *namerec;
  87
  88   *namerecp = NULL;
  89
  90   if((namerec = find_name_on_subnet(remote_broadcast_subnet, nmbname,
  91                                  FIND_ANY_NAME))==NULL)
  92     return False;
  93
  94   if(!NAME_IS_ACTIVE(namerec) || (namerec->data.source != LMHOSTS_NAME))
  95     return False;
  96
  97   *namerecp = namerec;
  98   return True;
  99 }