1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/*
Unix SMB/CIFS implementation.
send out a name release request
Copyright (C) Andrew Tridgell 2005
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/>.
*/
#include "includes.h"
#include "libcli/nbt/libnbt.h"
#include "lib/socket/socket.h"
#include "param/param.h"
/*
send a nbt name release request
*/
struct nbt_name_request *nbt_name_release_send(struct nbt_name_socket *nbtsock,
struct nbt_name_release *io)
{
struct nbt_name_request *req;
struct nbt_name_packet *packet;
struct socket_address *dest;
packet = talloc_zero(nbtsock, struct nbt_name_packet);
if (packet == NULL) return NULL;
packet->qdcount = 1;
packet->arcount = 1;
packet->operation = NBT_OPCODE_RELEASE;
if (io->in.broadcast) {
packet->operation |= NBT_FLAG_BROADCAST;
}
packet->questions = talloc_array(packet, struct nbt_name_question, 1);
if (packet->questions == NULL) goto failed;
packet->questions[0].name = io->in.name;
packet->questions[0].question_type = NBT_QTYPE_NETBIOS;
packet->questions[0].question_class = NBT_QCLASS_IP;
packet->additional = talloc_array(packet, struct nbt_res_rec, 1);
if (packet->additional == NULL) goto failed;
packet->additional[0].name = io->in.name;
packet->additional[0].rr_type = NBT_QTYPE_NETBIOS;
packet->additional[0].rr_class = NBT_QCLASS_IP;
packet->additional[0].ttl = 0;
packet->additional[0].rdata.netbios.length = 6;
packet->additional[0].rdata.netbios.addresses = talloc_array(packet->additional,
struct nbt_rdata_address, 1);
if (packet->additional[0].rdata.netbios.addresses == NULL) goto failed;
packet->additional[0].rdata.netbios.addresses[0].nb_flags = io->in.nb_flags;
packet->additional[0].rdata.netbios.addresses[0].ipaddr =
talloc_strdup(packet->additional, io->in.address);
dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
io->in.dest_addr, lp_nbt_port(global_loadparm));
if (dest == NULL) goto failed;
req = nbt_name_request_send(nbtsock, dest, packet,
io->in.timeout, io->in.retries, false);
if (req == NULL) goto failed;
talloc_free(packet);
return req;
failed:
talloc_free(packet);
return NULL;
}
/*
wait for a release reply
*/
NTSTATUS nbt_name_release_recv(struct nbt_name_request *req,
TALLOC_CTX *mem_ctx, struct nbt_name_release *io)
{
NTSTATUS status;
struct nbt_name_packet *packet;
status = nbt_name_request_recv(req);
if (!NT_STATUS_IS_OK(status) ||
req->num_replies == 0) {
talloc_free(req);
return status;
}
packet = req->replies[0].packet;
io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
if (packet->ancount != 1 ||
packet->answers[0].rr_type != NBT_QTYPE_NETBIOS ||
packet->answers[0].rr_class != NBT_QCLASS_IP) {
talloc_free(req);
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
io->out.rcode = packet->operation & NBT_RCODE;
io->out.name = packet->answers[0].name;
if (packet->answers[0].rdata.netbios.length < 6) {
talloc_free(req);
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
io->out.reply_addr = talloc_steal(mem_ctx,
packet->answers[0].rdata.netbios.addresses[0].ipaddr);
talloc_steal(mem_ctx, io->out.name.name);
talloc_steal(mem_ctx, io->out.name.scope);
talloc_free(req);
return NT_STATUS_OK;
}
/*
synchronous name release request
*/
NTSTATUS nbt_name_release(struct nbt_name_socket *nbtsock,
TALLOC_CTX *mem_ctx, struct nbt_name_release *io)
{
struct nbt_name_request *req = nbt_name_release_send(nbtsock, io);
return nbt_name_release_recv(req, mem_ctx, io);
}
|
