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
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/*
Unix SMB/CIFS implementation.
smb2 lib
Copyright (C) Volker Lendecke 2017
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 "system/network.h"
#include "lib/util/tevent_ntstatus.h"
#include "smb_common.h"
#include "smbXcli_base.h"
#include "librpc/gen_ndr/ndr_notify.h"
struct smb2cli_notify_state {
uint8_t fixed[32];
struct iovec *recv_iov;
uint8_t *data;
uint32_t data_length;
struct tevent_req *subreq;
struct tevent_req *timeout_subreq;
};
static void smb2cli_notify_done(struct tevent_req *subreq);
static void smb2cli_notify_timedout(struct tevent_req *subreq);
static bool smb2cli_notify_cancel(struct tevent_req *req);
struct tevent_req *smb2cli_notify_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbXcli_conn *conn,
uint32_t timeout_msec,
struct smbXcli_session *session,
struct smbXcli_tcon *tcon,
uint32_t output_buffer_length,
uint64_t fid_persistent,
uint64_t fid_volatile,
uint32_t completion_filter,
bool recursive)
{
struct tevent_req *req;
struct smb2cli_notify_state *state;
uint8_t *fixed;
uint16_t watch_tree;
req = tevent_req_create(mem_ctx, &state,
struct smb2cli_notify_state);
if (req == NULL) {
return NULL;
}
watch_tree = recursive ? SMB2_WATCH_TREE : 0;
fixed = state->fixed;
SSVAL(fixed, 0, 32);
SSVAL(fixed, 2, watch_tree);
SIVAL(fixed, 4, output_buffer_length);
SBVAL(fixed, 8, fid_persistent);
SBVAL(fixed, 16, fid_volatile);
SIVAL(fixed, 24, completion_filter);
SIVAL(fixed, 28, 0); /* reserved */
state->subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_NOTIFY,
0, 0, /* flags */
0, /* timeout_msec */
tcon,
session,
state->fixed, sizeof(state->fixed),
NULL, 0, /* dyn* */
0); /* max_dyn_len */
if (tevent_req_nomem(state->subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(state->subreq, smb2cli_notify_done, req);
if (timeout_msec != 0) {
state->timeout_subreq = tevent_wakeup_send(
state, ev, timeval_current_ofs_msec(timeout_msec));
if (tevent_req_nomem(state->timeout_subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(
state->timeout_subreq, smb2cli_notify_timedout, req);
}
tevent_req_set_cancel_fn(req, smb2cli_notify_cancel);
return req;
}
static bool smb2cli_notify_cancel(struct tevent_req *req)
{
struct smb2cli_notify_state *state = tevent_req_data(
req, struct smb2cli_notify_state);
bool ok;
TALLOC_FREE(state->timeout_subreq);
ok = tevent_req_cancel(state->subreq);
return ok;
}
static void smb2cli_notify_timedout(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct smb2cli_notify_state *state = tevent_req_data(
req, struct smb2cli_notify_state);
bool ok;
ok = tevent_wakeup_recv(subreq);
if (!ok) {
tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
return;
}
ok = tevent_req_cancel(state->subreq);
if (!ok) {
tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
return;
}
}
static void smb2cli_notify_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(
subreq, struct tevent_req);
struct smb2cli_notify_state *state = tevent_req_data(
req, struct smb2cli_notify_state);
NTSTATUS status;
struct iovec *iov;
uint16_t data_offset;
static const struct smb2cli_req_expected_response expected[] = {
{
.status = NT_STATUS_OK,
.body_size = 0x09
}
};
status = smb2cli_req_recv(subreq, state, &iov,
expected, ARRAY_SIZE(expected));
TALLOC_FREE(subreq);
if (NT_STATUS_EQUAL(status, NT_STATUS_CANCELLED)) {
status = NT_STATUS_IO_TIMEOUT;
}
if (tevent_req_nterror(req, status)) {
return;
}
data_offset = SVAL(iov[1].iov_base, 2);
state->data_length = IVAL(iov[1].iov_base, 4);
if ((data_offset != SMB2_HDR_BODY + 8) ||
(state->data_length > iov[2].iov_len)) {
tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
return;
}
state->recv_iov = iov;
state->data = (uint8_t *)iov[2].iov_base;
tevent_req_done(req);
}
NTSTATUS smb2cli_notify_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
uint8_t **data, uint32_t *data_length)
{
struct smb2cli_notify_state *state = tevent_req_data(
req, struct smb2cli_notify_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
return status;
}
talloc_steal(mem_ctx, state->recv_iov);
*data_length = state->data_length;
*data = state->data;
return NT_STATUS_OK;
}
NTSTATUS smb2cli_notify(struct smbXcli_conn *conn,
uint32_t timeout_msec,
struct smbXcli_session *session,
struct smbXcli_tcon *tcon,
uint32_t output_buffer_length,
uint64_t fid_persistent,
uint64_t fid_volatile,
uint32_t completion_filter,
bool recursive,
TALLOC_CTX *mem_ctx,
uint8_t **data,
uint32_t *data_length)
{
TALLOC_CTX *frame = talloc_stackframe();
struct tevent_context *ev;
struct tevent_req *req;
NTSTATUS status = NT_STATUS_NO_MEMORY;
if (smbXcli_conn_has_async_calls(conn)) {
/*
* Can't use sync call while an async call is in flight
*/
status = NT_STATUS_INVALID_PARAMETER;
goto fail;
}
ev = samba_tevent_context_init(frame);
if (ev == NULL) {
goto fail;
}
req = smb2cli_notify_send(frame, ev, conn, timeout_msec,
session, tcon, output_buffer_length,
fid_persistent, fid_volatile,
completion_filter, recursive);
if (req == NULL) {
goto fail;
}
if (!tevent_req_poll_ntstatus(req, ev, &status)) {
goto fail;
}
status = smb2cli_notify_recv(req, mem_ctx, data, data_length);
fail:
TALLOC_FREE(frame);
return status;
}
|
