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/*
Unix SMB/CIFS implementation.
NBT netbios routines and daemon - version 2
Copyright (C) Jeremy Allison 1994-1998
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 3 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, see <http://www.gnu.org/licenses/>.
Revision History:
Handle lmhosts file reading.
*/
#include "includes.h"
#include "../libcli/nbt/libnbt.h"
#include "nmbd/nmbd.h"
/****************************************************************************
Load a lmhosts file.
****************************************************************************/
void load_lmhosts_file(const char *fname)
{
char *name = NULL;
int name_type;
struct sockaddr_storage ss;
TALLOC_CTX *ctx = talloc_init("load_lmhosts_file");
FILE *fp = startlmhosts( fname );
if (!fp) {
DEBUG(2,("load_lmhosts_file: Can't open lmhosts file %s. Error was %s\n",
fname, strerror(errno)));
TALLOC_FREE(ctx);
return;
}
while (getlmhostsent(ctx, fp, &name, &name_type, &ss) ) {
struct in_addr ipaddr;
struct subnet_record *subrec = NULL;
enum name_source source = LMHOSTS_NAME;
if (ss.ss_family != AF_INET) {
TALLOC_FREE(name);
continue;
}
ipaddr = ((struct sockaddr_in *)&ss)->sin_addr;
/* We find a relevant 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_v4(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. */
(void)add_name_to_subnet(subrec,name,0x00,(uint16_t)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
(void)add_name_to_subnet(subrec,name,0x20,(uint16_t)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
} else {
/* Add the given name type to the subnet namelist. */
(void)add_name_to_subnet(subrec,name,name_type,(uint16_t)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr);
}
}
TALLOC_FREE(ctx);
endlmhosts(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->data.source != LMHOSTS_NAME))
return False;
*namerecp = namerec;
return True;
}
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