diff options
Diffstat (limited to 'source3/nmbd/nmbd_lmhosts.c')
| -rw-r--r-- | source3/nmbd/nmbd_lmhosts.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/source3/nmbd/nmbd_lmhosts.c b/source3/nmbd/nmbd_lmhosts.c new file mode 100644 index 0000000000..2dd1db81cd --- /dev/null +++ b/source3/nmbd/nmbd_lmhosts.c @@ -0,0 +1,168 @@ +/* + Unix SMB/Netbios implementation. + Version 1.9. + NBT netbios routines and daemon - version 2 + Copyright (C) Jeremy Allison 1994-1997 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + Revision History: + + Handle lmhosts file reading. + +*/ + +#include "includes.h" + +extern int DEBUGLEVEL; + +/**************************************************************************** +Load a lmhosts file. +****************************************************************************/ +void load_lmhosts_file(char *fname) +{ + FILE *fp = fopen(fname,"r"); + pstring line; + if (!fp) { + DEBUG(2,("load_lmhosts_file: Can't open lmhosts file %s. Error was %s\n", + fname, strerror(errno))); + return; + } + + while (!feof(fp)) + { + pstring ip,name,flags,extra; + struct subnet_record *subrec = NULL; + char *ptr; + int count = 0; + struct in_addr ipaddr; + enum name_source source = LMHOSTS_NAME; + int name_type = -1; + + if (!fgets_slash(line,sizeof(pstring),fp)) + continue; + + if (*line == '#') + continue; + + strcpy(ip,""); + strcpy(name,""); + strcpy(flags,""); + + ptr = line; + + if (next_token(&ptr,ip ,NULL)) + ++count; + if (next_token(&ptr,name ,NULL)) + ++count; + if (next_token(&ptr,flags,NULL)) + ++count; + if (next_token(&ptr,extra,NULL)) + ++count; + + if (count <= 0) + continue; + + if (count > 0 && count < 2) + { + DEBUG(0,("load_lmhosts_file: Ill formed hosts line [%s]\n",line)); + continue; + } + + if (count >= 4) + { + DEBUG(0,("load_lmhosts_file: too many columns in lmhosts file %s (obsolete syntax)\n", + fname)); + continue; + } + + DEBUG(4, ("load_lmhosts_file: lmhost entry: %s %s %s\n", ip, name, flags)); + + if (strchr(flags,'G') || strchr(flags,'S')) + { + DEBUG(0,("load_lmhosts_file: group flag in %s ignored (obsolete)\n",fname)); + continue; + } + + ipaddr = *interpret_addr2(ip); + + /* Extra feature. If the name ends in '#XX', where XX is a hex number, + then only add that name type. */ + if((ptr = strchr(name, '#')) != NULL) + { + char *endptr; + + ptr++; + name_type = (int)strtol(ptr, &endptr,0); + + if(!*ptr || (endptr == ptr)) + { + DEBUG(0,("load_lmhosts_file: invalid name %s containing '#'.\n", name)); + continue; + } + + *(--ptr) = '\0'; /* Truncate at the '#' */ + } + + /* We find a relevent subnet to put this entry on, then add it. */ + /* Go through all the broadcast subnets and see if the mask matches. */ + for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) + { + if(same_net(ipaddr, subrec->bcast_ip, subrec->mask_ip)) + break; + } + + /* If none match add the name to the remote_broadcast_subnet. */ + if(subrec == NULL) + subrec = remote_broadcast_subnet; + + if(name_type == -1) + { + /* Add the (0) and (0x20) names directly into the namelist for this subnet. */ + add_name_to_subnet(subrec,name,0x00,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr); + add_name_to_subnet(subrec,name,0x20,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr); + } + else + { + /* Add the given name type to the subnet namelist. */ + add_name_to_subnet(subrec,name,name_type,(uint16)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr); + } + } + + fclose(fp); +} + +/**************************************************************************** + Find a name read from the lmhosts file. We secretly check the names on + the remote_broadcast_subnet as if the name was added to a regular broadcast + subnet it will be found by normal name query processing. +****************************************************************************/ + +BOOL find_name_in_lmhosts(struct nmb_name *nmbname, struct name_record **namerecp) +{ + struct name_record *namerec; + + *namerecp = NULL; + + if((namerec = find_name_on_subnet(remote_broadcast_subnet, nmbname, + FIND_ANY_NAME))==NULL) + return False; + + if(!NAME_IS_ACTIVE(namerec) || (namerec->source != LMHOSTS_NAME)) + return False; + + *namerecp = namerec; + return True; +} |