2 Unix SMB/CIFS implementation.
4 answer node status queries
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 "lib/socket/socket.h"
27 #include "librpc/gen_ndr/ndr_nbt.h"
30 send a name status reply
32 static void nbtd_node_status_reply(struct nbt_name_socket
*nbtsock
,
33 struct nbt_name_packet
*request_packet
,
34 struct socket_address
*src
,
35 struct nbt_name
*name
,
36 struct nbtd_interface
*iface
)
38 struct nbt_name_packet
*packet
;
40 struct nbtd_iface_name
*iname
;
41 struct nbtd_server
*nbtsrv
= iface
->nbtsrv
;
43 /* work out how many names to send */
45 for (iname
=iface
->names
;iname
;iname
=iname
->next
) {
46 if ((iname
->nb_flags
& NBT_NM_ACTIVE
) &&
47 strcmp(iname
->name
.name
, "*") != 0) {
52 packet
= talloc_zero(nbtsock
, struct nbt_name_packet
);
53 if (packet
== NULL
) return;
55 packet
->name_trn_id
= request_packet
->name_trn_id
;
57 packet
->operation
= NBT_OPCODE_QUERY
| NBT_FLAG_REPLY
| NBT_FLAG_AUTHORITATIVE
;
59 packet
->answers
= talloc_array(packet
, struct nbt_res_rec
, 1);
60 if (packet
->answers
== NULL
) goto failed
;
62 packet
->answers
[0].name
= *name
;
63 packet
->answers
[0].rr_type
= NBT_QTYPE_STATUS
;
64 packet
->answers
[0].rr_class
= NBT_QCLASS_IP
;
65 packet
->answers
[0].ttl
= 0;
66 packet
->answers
[0].rdata
.status
.num_names
= name_count
;
67 packet
->answers
[0].rdata
.status
.names
= talloc_array(packet
->answers
,
68 struct nbt_status_name
, name_count
);
69 if (packet
->answers
[0].rdata
.status
.names
== NULL
) goto failed
;
72 for (iname
=iface
->names
;iname
;iname
=iname
->next
) {
73 if ((iname
->nb_flags
& NBT_NM_ACTIVE
) &&
74 strcmp(iname
->name
.name
, "*") != 0) {
75 struct nbt_status_name
*n
= &packet
->answers
[0].rdata
.status
.names
[name_count
];
76 n
->name
= talloc_asprintf(packet
->answers
, "%-15s", iname
->name
.name
);
77 if (n
->name
== NULL
) goto failed
;
78 n
->type
= iname
->name
.type
;
79 n
->nb_flags
= iname
->nb_flags
;
83 /* we deliberately don't fill in the statistics structure as
84 it could lead to giving attackers too much information */
85 ZERO_STRUCT(packet
->answers
[0].rdata
.status
.statistics
);
87 DEBUG(7,("Sending node status reply for %s to %s:%d\n",
88 nbt_name_string(packet
, name
), src
->addr
, src
->port
));
90 nbtsrv
->stats
.total_sent
++;
91 nbt_name_reply_send(nbtsock
, src
, packet
);
99 answer a node status query
101 void nbtd_query_status(struct nbt_name_socket
*nbtsock
,
102 struct nbt_name_packet
*packet
,
103 struct socket_address
*src
)
105 struct nbt_name
*name
;
106 struct nbtd_iface_name
*iname
;
107 struct nbtd_interface
*iface
= talloc_get_type(nbtsock
->incoming
.private_data
,
108 struct nbtd_interface
);
110 NBTD_ASSERT_PACKET(packet
, src
, packet
->qdcount
== 1);
111 NBTD_ASSERT_PACKET(packet
, src
, packet
->questions
[0].question_type
== NBT_QTYPE_STATUS
);
112 NBTD_ASSERT_PACKET(packet
, src
, packet
->questions
[0].question_class
== NBT_QCLASS_IP
);
114 /* see if we have the requested name on this interface */
115 name
= &packet
->questions
[0].name
;
117 iname
= nbtd_find_iname(iface
, name
, NBT_NM_ACTIVE
);
119 DEBUG(7,("Node status query for %s from %s - not found on %s\n",
120 nbt_name_string(packet
, name
), src
->addr
, iface
->ip_address
));
124 nbtd_node_status_reply(nbtsock
, packet
, src
,
125 &iname
->name
, iface
);