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 27/**************************************************************************** 28Load a lmhosts file. 29****************************************************************************/ 30 31void load_lmhosts_file(const char *fname) 32{ 33 char *name = NULL; 34 int name_type; 35 struct sockaddr_storage ss; 36 TALLOC_CTX *ctx = talloc_init("load_lmhosts_file"); 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 TALLOC_FREE(ctx); 43 return; 44 } 45 46 while (getlmhostsent(ctx, fp, &name, &name_type, &ss) ) { 47 struct in_addr ipaddr; 48 struct subnet_record *subrec = NULL; 49 enum name_source source = LMHOSTS_NAME; 50 51 if (ss.ss_family != AF_INET) { 52 TALLOC_FREE(name); 53 continue; 54 } 55 56 ipaddr = ((struct sockaddr_in *)&ss)->sin_addr; 57 58 /* We find a relevent subnet to put this entry on, then add it. */ 59 /* Go through all the broadcast subnets and see if the mask matches. */ 60 for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) { 61 if(same_net_v4(ipaddr, subrec->bcast_ip, subrec->mask_ip)) 62 break; 63 } 64 65 /* If none match add the name to the remote_broadcast_subnet. */ 66 if(subrec == NULL) 67 subrec = remote_broadcast_subnet; 68 69 if(name_type == -1) { 70 /* Add the (0) and (0x20) names directly into the namelist for this subnet. */ 71 (void)add_name_to_subnet(subrec,name,0x00,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr); 72 (void)add_name_to_subnet(subrec,name,0x20,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr); 73 } else { 74 /* Add the given name type to the subnet namelist. */ 75 (void)add_name_to_subnet(subrec,name,name_type,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr); 76 } 77 } 78 79 TALLOC_FREE(ctx); 80 endlmhosts(fp); 81} 82 83/**************************************************************************** 84 Find a name read from the lmhosts file. We secretly check the names on 85 the remote_broadcast_subnet as if the name was added to a regular broadcast 86 subnet it will be found by normal name query processing. 87****************************************************************************/ 88 89bool find_name_in_lmhosts(struct nmb_name *nmbname, struct name_record **namerecp) 90{ 91 struct name_record *namerec; 92 93 *namerecp = NULL; 94 95 if((namerec = find_name_on_subnet(remote_broadcast_subnet, nmbname, FIND_ANY_NAME))==NULL) 96 return False; 97 98 if(!NAME_IS_ACTIVE(namerec) || (namerec->data.source != LMHOSTS_NAME)) 99 return False; 100 101 *namerecp = namerec; 102 return True; 103} 104