summaryrefslogtreecommitdiffstats
path: root/libcli/smb/smb2cli_query_info.c
blob: d4996116dc70a2ba6bff24ee9c9d959a9fc73ddd (plain)
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
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
/*
   Unix SMB/CIFS implementation.
   smb2 lib
   Copyright (C) Stefan Metzmacher 2012

   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"

struct smb2cli_query_info_state {
	uint8_t fixed[0x28];
	uint8_t dyn_pad[1];
	uint32_t max_output_length;
	struct iovec *recv_iov;
	DATA_BLOB out_output_buffer;
	bool out_valid;
};

static void smb2cli_query_info_done(struct tevent_req *subreq);

struct tevent_req *smb2cli_query_info_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,
					   uint8_t in_info_type,
					   uint8_t in_file_info_class,
					   uint32_t in_max_output_length,
					   const DATA_BLOB *in_input_buffer,
					   uint32_t in_additional_info,
					   uint32_t in_flags,
					   uint64_t in_fid_persistent,
					   uint64_t in_fid_volatile)
{
	struct tevent_req *req, *subreq;
	struct smb2cli_query_info_state *state;
	uint8_t *fixed;
	uint8_t *dyn;
	size_t dyn_len;
	uint16_t input_buffer_offset = 0;
	uint32_t input_buffer_length = 0;

	req = tevent_req_create(mem_ctx, &state,
				struct smb2cli_query_info_state);
	if (req == NULL) {
		return NULL;
	}
	state->max_output_length = in_max_output_length;

	if (in_input_buffer) {
		input_buffer_offset = SMB2_HDR_BODY+0x28;
		input_buffer_length = in_input_buffer->length;
	}

	fixed = state->fixed;

	SSVAL(fixed, 0x00, 0x29);
	SCVAL(fixed, 0x02, in_info_type);
	SCVAL(fixed, 0x03, in_file_info_class); /* reserved */
	SIVAL(fixed, 0x04, in_max_output_length);
	SSVAL(fixed, 0x08, input_buffer_offset);
	SSVAL(fixed, 0x0A, 0); /* reserved */
	SIVAL(fixed, 0x0C, input_buffer_length);
	SIVAL(fixed, 0x10, in_additional_info);
	SIVAL(fixed, 0x14, in_flags);
	SBVAL(fixed, 0x18, in_fid_persistent);
	SBVAL(fixed, 0x20, in_fid_volatile);

	if (input_buffer_length > 0) {
		dyn = in_input_buffer->data;
		dyn_len = in_input_buffer->length;
	} else {
		dyn = state->dyn_pad;
		dyn_len = sizeof(state->dyn_pad);
	}

	subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_GETINFO,
				  0, 0, /* flags */
				  timeout_msec,
				  tcon,
				  session,
				  state->fixed, sizeof(state->fixed),
				  dyn, dyn_len,
				  in_max_output_length); /* max_dyn_len */
	if (tevent_req_nomem(subreq, req)) {
		return tevent_req_post(req, ev);
	}
	tevent_req_set_callback(subreq, smb2cli_query_info_done, req);
	return req;
}

static void smb2cli_query_info_done(struct tevent_req *subreq)
{
	struct tevent_req *req =
		tevent_req_callback_data(subreq,
		struct tevent_req);
	struct smb2cli_query_info_state *state =
		tevent_req_data(req,
		struct smb2cli_query_info_state);
	NTSTATUS status;
	struct iovec *iov;
	uint8_t *fixed;
	uint8_t *dyn;
	size_t dyn_len;
	uint32_t dyn_ofs = SMB2_HDR_BODY + 0x08;
	uint32_t output_buffer_offset;
	uint32_t output_buffer_length;
	static const struct smb2cli_req_expected_response expected[] = {
	{
		.status = NT_STATUS_OK,
		.body_size = 0x09
	},
	{
		.status = STATUS_BUFFER_OVERFLOW,
		.body_size = 0x09
	}
	};

	status = smb2cli_req_recv(subreq, state, &iov,
				  expected, ARRAY_SIZE(expected));
	TALLOC_FREE(subreq);
	if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
		/* no error */
	} else {
		if (tevent_req_nterror(req, status)) {
			return;
		}
	}

	state->recv_iov = iov;
	fixed = (uint8_t *)iov[1].iov_base;
	dyn = (uint8_t *)iov[2].iov_base;
	dyn_len = iov[2].iov_len;

	output_buffer_offset = SVAL(fixed, 0x02);
	output_buffer_length = IVAL(fixed, 0x04);

	if ((output_buffer_offset > 0) && (output_buffer_length > 0)) {
		if (output_buffer_offset != dyn_ofs) {
			tevent_req_nterror(
				req, NT_STATUS_INVALID_NETWORK_RESPONSE);
			return;
		}

		if (output_buffer_length > dyn_len) {
			tevent_req_nterror(
				req, NT_STATUS_INVALID_NETWORK_RESPONSE);
			return;
		}

		if (output_buffer_length > state->max_output_length) {
			tevent_req_nterror(
				req, NT_STATUS_INVALID_NETWORK_RESPONSE);
			return;
		}

		state->out_output_buffer.data = dyn;
		state->out_output_buffer.length = output_buffer_length;
	}

	state->out_valid = true;

	if (tevent_req_nterror(req, status)) {
		return;
	}

	tevent_req_done(req);
}

NTSTATUS smb2cli_query_info_recv(struct tevent_req *req,
				 TALLOC_CTX *mem_ctx,
				 DATA_BLOB *out_output_buffer)
{
	struct smb2cli_query_info_state *state =
		tevent_req_data(req,
		struct smb2cli_query_info_state);
	NTSTATUS status = NT_STATUS_OK;

	if (tevent_req_is_nterror(req, &status) && !state->out_valid) {
		if (out_output_buffer) {
			*out_output_buffer = data_blob_null;
		}
		tevent_req_received(req);
		return status;
	}

	talloc_steal(mem_ctx, state->recv_iov);
	if (out_output_buffer) {
		*out_output_buffer = state->out_output_buffer;
	}

	tevent_req_received(req);
	return status;
}

NTSTATUS smb2cli_query_info(struct smbXcli_conn *conn,
			    uint32_t timeout_msec,
			    struct smbXcli_session *session,
			    struct smbXcli_tcon *tcon,
			    uint8_t in_info_type,
			    uint8_t in_file_info_class,
			    uint32_t in_max_output_length,
			    const DATA_BLOB *in_input_buffer,
			    uint32_t in_additional_info,
			    uint32_t in_flags,
			    uint64_t in_fid_persistent,
			    uint64_t in_fid_volatile,
			    TALLOC_CTX *mem_ctx,
			    DATA_BLOB *out_output_buffer)
{
	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_MIX;
		goto fail;
	}
	ev = samba_tevent_context_init(frame);
	if (ev == NULL) {
		goto fail;
	}
	req = smb2cli_query_info_send(frame, ev,
				      conn, timeout_msec,
				      session, tcon,
				      in_info_type,
				      in_file_info_class,
				      in_max_output_length,
				      in_input_buffer,
				      in_additional_info,
				      in_flags,
				      in_fid_persistent,
				      in_fid_volatile);
	if (req == NULL) {
		goto fail;
	}
	if (!tevent_req_poll_ntstatus(req, ev, &status)) {
		goto fail;
	}
	status = smb2cli_query_info_recv(req, mem_ctx,
					 out_output_buffer);
 fail:
	TALLOC_FREE(frame);
	return status;
}