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 3 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, see <http://www.gnu.org/licenses/>.
23 #include "lib/util/dlinklist.h"
24 #include "system/network.h"
25 #include "nbt_server/nbt_server.h"
26 #include "nbt_server/wins/winsserver.h"
27 #include "librpc/gen_ndr/ndr_nbt.h"
28 #include "lib/socket/socket.h"
32 defend our registered names against registration or name refresh
35 void nbtd_request_defense(struct nbt_name_socket
*nbtsock
,
36 struct nbt_name_packet
*packet
,
37 struct socket_address
*src
)
39 struct nbtd_iface_name
*iname
;
40 struct nbt_name
*name
;
41 struct nbtd_interface
*iface
= talloc_get_type(nbtsock
->incoming
.private_data
,
42 struct nbtd_interface
);
45 * if the packet comes from one of our interfaces
46 * it must be our winsclient trying to reach the winsserver
48 if (nbtd_self_packet(nbtsock
, packet
, src
)) {
49 nbtd_winsserver_request(nbtsock
, packet
, src
);
53 NBTD_ASSERT_PACKET(packet
, src
, packet
->qdcount
== 1);
54 NBTD_ASSERT_PACKET(packet
, src
, packet
->arcount
== 1);
55 NBTD_ASSERT_PACKET(packet
, src
,
56 packet
->questions
[0].question_type
== NBT_QTYPE_NETBIOS
);
57 NBTD_ASSERT_PACKET(packet
, src
,
58 packet
->questions
[0].question_class
== NBT_QCLASS_IP
);
59 NBTD_ASSERT_PACKET(packet
, src
,
60 packet
->additional
[0].rr_type
== NBT_QTYPE_NETBIOS
);
61 NBTD_ASSERT_PACKET(packet
, src
,
62 packet
->additional
[0].rr_class
== NBT_QCLASS_IP
);
63 NBTD_ASSERT_PACKET(packet
, src
,
64 packet
->additional
[0].rdata
.netbios
.length
== 6);
66 /* see if we have the requested name on this interface */
67 name
= &packet
->questions
[0].name
;
69 iname
= nbtd_find_iname(iface
, name
, NBT_NM_ACTIVE
);
71 !(name
->type
== NBT_NAME_LOGON
|| iname
->nb_flags
& NBT_NM_GROUP
)) {
72 DEBUG(2,("Defending name %s on %s against %s\n",
73 nbt_name_string(packet
, name
),
74 iface
->bcast_address
, src
->addr
));
75 nbtd_name_registration_reply(nbtsock
, packet
, src
, NBT_RCODE_ACT
);
77 nbtd_winsserver_request(nbtsock
, packet
, src
);