2 Unix SMB/CIFS implementation.
4 defend our names against name registration requests
6 Copyright (C) Andrew Tridgell 2005
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include "dlinklist.h"
25 #include "system/network.h"
26 #include "nbt_server/nbt_server.h"
30 defend our registered names against registration or name refresh
33 void nbtd_request_defense(struct nbt_name_socket
*nbtsock
,
34 struct nbt_name_packet
*packet
,
35 const char *src_address
, int src_port
)
37 struct nbtd_iface_name
*iname
;
38 struct nbt_name
*name
;
39 struct nbtd_interface
*iface
= talloc_get_type(nbtsock
->incoming
.private,
40 struct nbtd_interface
);
42 NBTD_ASSERT_PACKET(packet
, src_address
, packet
->qdcount
== 1);
43 NBTD_ASSERT_PACKET(packet
, src_address
, packet
->arcount
== 1);
44 NBTD_ASSERT_PACKET(packet
, src_address
,
45 packet
->questions
[0].question_type
== NBT_QTYPE_NETBIOS
);
46 NBTD_ASSERT_PACKET(packet
, src_address
,
47 packet
->questions
[0].question_class
== NBT_QCLASS_IP
);
48 NBTD_ASSERT_PACKET(packet
, src_address
,
49 packet
->additional
[0].rr_type
== NBT_QTYPE_NETBIOS
);
50 NBTD_ASSERT_PACKET(packet
, src_address
,
51 packet
->additional
[0].rr_class
== NBT_QCLASS_IP
);
52 NBTD_ASSERT_PACKET(packet
, src_address
,
53 packet
->additional
[0].rdata
.netbios
.length
== 6);
55 /* see if we have the requested name on this interface */
56 name
= &packet
->questions
[0].name
;
58 iname
= nbtd_find_iname(iface
, name
, NBT_NM_ACTIVE
);
60 !IS_GROUP_NAME(name
, iname
->nb_flags
)) {
61 DEBUG(2,("Defending name %s on %s against %s\n",
62 nbt_name_string(packet
, name
),
63 iface
->bcast_address
, src_address
));
64 nbtd_name_registration_reply(nbtsock
, packet
,
65 src_address
, src_port
, NBT_RCODE_ACT
);
67 nbtd_winsserver_request(nbtsock
, packet
, src_address
, src_port
);