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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/*
Unix SMB/CIFS implementation.
nbt list of addresses name resolution module
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/>.
*/
/*
TODO: we should lower the timeout, and add retries for each name
*/
#include "includes.h"
#include "libcli/composite/composite.h"
#include "system/network.h"
#include "lib/socket/socket.h"
#include "lib/socket/netif.h"
#include "librpc/gen_ndr/ndr_nbt.h"
#include "../libcli/nbt/libnbt.h"
#include "param/param.h"
#include "libcli/resolve/resolve.h"
struct nbtlist_state {
struct nbt_name name;
struct nbt_name_socket *nbtsock;
int num_queries;
struct nbt_name_request **queries;
struct nbt_name_query *io_queries;
struct socket_address **addrs;
struct interface *ifaces;
};
/*
handle events during nbtlist name resolution
*/
static void nbtlist_handler(struct nbt_name_request *req)
{
struct composite_context *c = talloc_get_type(req->async.private_data,
struct composite_context);
struct nbtlist_state *state = talloc_get_type(c->private_data, struct nbtlist_state);
struct nbt_name_query *q;
int i;
for (i=0;i<state->num_queries;i++) {
if (req == state->queries[i]) break;
}
if (i == state->num_queries) {
/* not for us?! */
composite_error(c, NT_STATUS_INTERNAL_ERROR);
return;
}
q = &state->io_queries[i];
c->status = nbt_name_query_recv(req, state, q);
/* free the network resource directly */
talloc_free(state->nbtsock);
if (!composite_is_ok(c)) return;
if (q->out.num_addrs < 1) {
composite_error(c, NT_STATUS_UNEXPECTED_NETWORK_ERROR);
return;
}
state->addrs = talloc_array(state, struct socket_address *,
q->out.num_addrs + 1);
if (composite_nomem(state->addrs, c)) return;
for (i=0;i<q->out.num_addrs;i++) {
state->addrs[i] = socket_address_from_strings(state->addrs,
"ipv4",
q->out.reply_addrs[i],
0);
if (composite_nomem(state->addrs[i], c)) return;
}
state->addrs[i] = NULL;
composite_done(c);
}
/*
nbtlist name resolution method - async send
*/
struct composite_context *resolve_name_nbtlist_send(TALLOC_CTX *mem_ctx,
struct event_context *event_ctx,
struct nbt_name *name,
const char **address_list,
struct interface *ifaces,
uint16_t nbt_port,
int nbt_timeout,
bool broadcast,
bool wins_lookup)
{
struct composite_context *c;
struct nbtlist_state *state;
int i;
c = composite_create(mem_ctx, event_ctx);
if (c == NULL) return NULL;
if (composite_nomem(c->event_ctx, c)) return c;
state = talloc(c, struct nbtlist_state);
if (composite_nomem(state, c)) return c;
c->private_data = state;
c->status = nbt_name_dup(state, name, &state->name);
if (!composite_is_ok(c)) return c;
state->name.name = strupper_talloc(state, state->name.name);
if (composite_nomem(state->name.name, c)) return c;
if (state->name.scope) {
state->name.scope = strupper_talloc(state, state->name.scope);
if (composite_nomem(state->name.scope, c)) return c;
}
state->ifaces = talloc_reference(state, ifaces);
/*
* we can't push long names on the wire,
* so bail out here to give a useful error message
*/
if (strlen(state->name.name) > 15) {
composite_error(c, NT_STATUS_OBJECT_NAME_NOT_FOUND);
return c;
}
state->nbtsock = nbt_name_socket_init(state, event_ctx,
global_iconv_convenience);
if (composite_nomem(state->nbtsock, c)) return c;
/* count the address_list size */
for (i=0;address_list[i];i++) /* noop */ ;
state->num_queries = i;
state->io_queries = talloc_array(state, struct nbt_name_query, state->num_queries);
if (composite_nomem(state->io_queries, c)) return c;
state->queries = talloc_array(state, struct nbt_name_request *, state->num_queries);
if (composite_nomem(state->queries, c)) return c;
for (i=0;i<state->num_queries;i++) {
state->io_queries[i].in.name = state->name;
state->io_queries[i].in.dest_addr = talloc_strdup(state->io_queries, address_list[i]);
state->io_queries[i].in.dest_port = nbt_port;
if (composite_nomem(state->io_queries[i].in.dest_addr, c)) return c;
state->io_queries[i].in.broadcast = broadcast;
state->io_queries[i].in.wins_lookup = wins_lookup;
state->io_queries[i].in.timeout = nbt_timeout;
state->io_queries[i].in.retries = 2;
state->queries[i] = nbt_name_query_send(state->nbtsock, &state->io_queries[i]);
if (composite_nomem(state->queries[i], c)) return c;
state->queries[i]->async.fn = nbtlist_handler;
state->queries[i]->async.private_data = c;
}
return c;
}
/*
nbt list of addresses name resolution method - recv side
*/
NTSTATUS resolve_name_nbtlist_recv(struct composite_context *c,
TALLOC_CTX *mem_ctx,
struct socket_address ***addrs)
{
NTSTATUS status;
status = composite_wait(c);
if (NT_STATUS_IS_OK(status)) {
struct nbtlist_state *state = talloc_get_type(c->private_data, struct nbtlist_state);
*addrs = talloc_steal(mem_ctx, state->addrs);
}
talloc_free(c);
return status;
}
/*
nbt list of addresses name resolution method - sync call
*/
NTSTATUS resolve_name_nbtlist(struct nbt_name *name,
TALLOC_CTX *mem_ctx,
const char **address_list,
struct interface *ifaces,
uint16_t nbt_port,
int nbt_timeout,
bool broadcast, bool wins_lookup,
struct socket_address ***addrs)
{
struct composite_context *c = resolve_name_nbtlist_send(mem_ctx, NULL,
name, address_list,
ifaces, nbt_port,
nbt_timeout,
broadcast, wins_lookup);
return resolve_name_nbtlist_recv(c, mem_ctx, addrs);
}
|
