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