Line data    Source code

       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 3 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, see <http://www.gnu.org/licenses/>.
      18             : 
      19             :    Revision History:
      20             : 
      21             :    Handle lmhosts file reading.
      22             : 
      23             : */
      24             : 
      25             : #include "includes.h"
      26             : #include "../libcli/nbt/libnbt.h"
      27             : #include "nmbd/nmbd.h"
      28             : 
      29             : /****************************************************************************
      30             : Load a lmhosts file.
      31             : ****************************************************************************/
      32             : 
      33          39 : void load_lmhosts_file(const char *fname)
      34             : {
      35          39 :         char *name = NULL;
      36             :         int name_type;
      37             :         struct sockaddr_storage ss;
      38          39 :         TALLOC_CTX *ctx = talloc_init("load_lmhosts_file");
      39          39 :         FILE *fp = startlmhosts( fname );
      40             : 
      41          39 :         if (!fp) {
      42          39 :                 DEBUG(2,("load_lmhosts_file: Can't open lmhosts file %s. Error was %s\n",
      43             :                         fname, strerror(errno)));
      44          39 :                 TALLOC_FREE(ctx);
      45          39 :                 return;
      46             :         }
      47             : 
      48           0 :         while (getlmhostsent(ctx, fp, &name, &name_type, &ss) ) {
      49             :                 struct in_addr ipaddr;
      50           0 :                 struct subnet_record *subrec = NULL;
      51           0 :                 enum name_source source = LMHOSTS_NAME;
      52             : 
      53           0 :                 if (ss.ss_family != AF_INET) {
      54           0 :                         TALLOC_FREE(name);
      55           0 :                         continue;
      56             :                 }
      57             : 
      58           0 :                 ipaddr = ((struct sockaddr_in *)&ss)->sin_addr;
      59             : 
      60             :                 /* We find a relevant subnet to put this entry on, then add it. */
      61             :                 /* Go through all the broadcast subnets and see if the mask matches. */
      62           0 :                 for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
      63           0 :                         if(same_net_v4(ipaddr, subrec->bcast_ip, subrec->mask_ip))
      64           0 :                                 break;
      65             :                 }
      66             : 
      67             :                 /* If none match add the name to the remote_broadcast_subnet. */
      68           0 :                 if(subrec == NULL)
      69           0 :                         subrec = remote_broadcast_subnet;
      70             : 
      71           0 :                 if(name_type == -1) {
      72             :                         /* Add the (0) and (0x20) names directly into the namelist for this subnet. */
      73           0 :                         (void)add_name_to_subnet(subrec,name,0x00,(uint16_t)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
      74           0 :                         (void)add_name_to_subnet(subrec,name,0x20,(uint16_t)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
      75             :                 } else {
      76             :                         /* Add the given name type to the subnet namelist. */
      77           0 :                         (void)add_name_to_subnet(subrec,name,name_type,(uint16_t)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
      78             :                 }
      79             :         }
      80             : 
      81           0 :         TALLOC_FREE(ctx);
      82           0 :         endlmhosts(fp);
      83             : }
      84             : 
      85             : /****************************************************************************
      86             :   Find a name read from the lmhosts file. We secretly check the names on
      87             :   the remote_broadcast_subnet as if the name was added to a regular broadcast
      88             :   subnet it will be found by normal name query processing.
      89             : ****************************************************************************/
      90             : 
      91          96 : bool find_name_in_lmhosts(struct nmb_name *nmbname, struct name_record **namerecp)
      92             : {
      93             :         struct name_record *namerec;
      94             : 
      95          96 :         *namerecp = NULL;
      96             : 
      97          96 :         if((namerec = find_name_on_subnet(remote_broadcast_subnet, nmbname, FIND_ANY_NAME))==NULL)
      98          96 :                 return False;
      99             : 
     100           0 :         if(!NAME_IS_ACTIVE(namerec) || (namerec->data.source != LMHOSTS_NAME))
     101           0 :                 return False;
     102             : 
     103           0 :         *namerecp = namerec;
     104           0 :         return True;
     105             : }