source: vendor/current/libcli/smb/smb2cli_create.c

Last change on this file was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 8.0 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 smb2 lib
4 Copyright (C) Volker Lendecke 2011
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
18*/
19
20#include "includes.h"
21#include "system/network.h"
22#include "lib/util/tevent_ntstatus.h"
23#include "smb_common.h"
24#include "smbXcli_base.h"
25#include "smb2_create_blob.h"
26
27struct smb2cli_create_state {
28 uint8_t fixed[56];
29
30 uint64_t fid_persistent;
31 uint64_t fid_volatile;
32 struct smb_create_returns cr;
33 struct smb2_create_blobs blobs;
34 struct tevent_req *subreq;
35};
36
37static void smb2cli_create_done(struct tevent_req *subreq);
38static bool smb2cli_create_cancel(struct tevent_req *req);
39
40struct tevent_req *smb2cli_create_send(
41 TALLOC_CTX *mem_ctx,
42 struct tevent_context *ev,
43 struct smbXcli_conn *conn,
44 uint32_t timeout_msec,
45 struct smbXcli_session *session,
46 struct smbXcli_tcon *tcon,
47 const char *filename,
48 uint8_t oplock_level, /* SMB2_OPLOCK_LEVEL_* */
49 uint32_t impersonation_level, /* SMB2_IMPERSONATION_* */
50 uint32_t desired_access,
51 uint32_t file_attributes,
52 uint32_t share_access,
53 uint32_t create_disposition,
54 uint32_t create_options,
55 struct smb2_create_blobs *blobs)
56{
57 struct tevent_req *req, *subreq;
58 struct smb2cli_create_state *state;
59 uint8_t *fixed;
60 uint8_t *name_utf16;
61 size_t name_utf16_len;
62 DATA_BLOB blob;
63 NTSTATUS status;
64 size_t blobs_offset;
65 uint8_t *dyn;
66 size_t dyn_len;
67 size_t max_dyn_len;
68 uint32_t additional_flags = 0;
69 uint32_t clear_flags = 0;
70
71 req = tevent_req_create(mem_ctx, &state,
72 struct smb2cli_create_state);
73 if (req == NULL) {
74 return NULL;
75 }
76
77 if (!convert_string_talloc(state, CH_UNIX, CH_UTF16,
78 filename, strlen(filename),
79 &name_utf16, &name_utf16_len)) {
80 tevent_req_oom(req);
81 return tevent_req_post(req, ev);
82 }
83
84 if (strlen(filename) == 0) {
85 TALLOC_FREE(name_utf16);
86 name_utf16_len = 0;
87 }
88
89 fixed = state->fixed;
90
91 SSVAL(fixed, 0, 57);
92 SCVAL(fixed, 3, oplock_level);
93 SIVAL(fixed, 4, impersonation_level);
94 SIVAL(fixed, 24, desired_access);
95 SIVAL(fixed, 28, file_attributes);
96 SIVAL(fixed, 32, share_access);
97 SIVAL(fixed, 36, create_disposition);
98 SIVAL(fixed, 40, create_options);
99
100 SSVAL(fixed, 44, SMB2_HDR_BODY + 56);
101 SSVAL(fixed, 46, name_utf16_len);
102
103 blob = data_blob_null;
104
105 if (blobs != NULL) {
106 status = smb2_create_blob_push(state, &blob, *blobs);
107 if (tevent_req_nterror(req, status)) {
108 return tevent_req_post(req, ev);
109 }
110 }
111
112 blobs_offset = name_utf16_len;
113 blobs_offset = ((blobs_offset + 3) & ~3);
114
115 if (blob.length > 0) {
116 SIVAL(fixed, 48, blobs_offset + SMB2_HDR_BODY + 56);
117 SIVAL(fixed, 52, blob.length);
118 }
119
120 dyn_len = MAX(1, blobs_offset + blob.length);
121 dyn = talloc_zero_array(state, uint8_t, dyn_len);
122 if (tevent_req_nomem(dyn, req)) {
123 return tevent_req_post(req, ev);
124 }
125
126 if (name_utf16) {
127 memcpy(dyn, name_utf16, name_utf16_len);
128 TALLOC_FREE(name_utf16);
129 }
130
131 if (blob.data != NULL) {
132 memcpy(dyn + blobs_offset,
133 blob.data, blob.length);
134 data_blob_free(&blob);
135 }
136
137 if (smbXcli_conn_dfs_supported(conn) &&
138 smbXcli_tcon_is_dfs_share(tcon))
139 {
140 additional_flags |= SMB2_HDR_FLAG_DFS;
141 }
142
143 /*
144 * We use max_dyn_len = 0
145 * as we don't explicitly ask for any output length.
146 *
147 * But it's still possible for the server to return
148 * large create blobs.
149 */
150 max_dyn_len = 0;
151
152 subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_CREATE,
153 additional_flags, clear_flags,
154 timeout_msec,
155 tcon,
156 session,
157 state->fixed, sizeof(state->fixed),
158 dyn, dyn_len,
159 max_dyn_len);
160 if (tevent_req_nomem(subreq, req)) {
161 return tevent_req_post(req, ev);
162 }
163 tevent_req_set_callback(subreq, smb2cli_create_done, req);
164
165 state->subreq = subreq;
166 tevent_req_set_cancel_fn(req, smb2cli_create_cancel);
167
168 return req;
169}
170
171static bool smb2cli_create_cancel(struct tevent_req *req)
172{
173 struct smb2cli_create_state *state = tevent_req_data(req,
174 struct smb2cli_create_state);
175 return tevent_req_cancel(state->subreq);
176}
177
178static void smb2cli_create_done(struct tevent_req *subreq)
179{
180 struct tevent_req *req =
181 tevent_req_callback_data(subreq,
182 struct tevent_req);
183 struct smb2cli_create_state *state =
184 tevent_req_data(req,
185 struct smb2cli_create_state);
186 NTSTATUS status;
187 struct iovec *iov;
188 uint8_t *body;
189 uint32_t offset, length;
190 static const struct smb2cli_req_expected_response expected[] = {
191 {
192 .status = NT_STATUS_OK,
193 .body_size = 0x59
194 }
195 };
196
197 status = smb2cli_req_recv(subreq, state, &iov,
198 expected, ARRAY_SIZE(expected));
199 TALLOC_FREE(subreq);
200 if (tevent_req_nterror(req, status)) {
201 return;
202 }
203
204 body = (uint8_t *)iov[1].iov_base;
205
206 state->cr.oplock_level = CVAL(body, 2);
207 state->cr.create_action = IVAL(body, 4);
208 state->cr.creation_time = BVAL(body, 8);
209 state->cr.last_access_time = BVAL(body, 16);
210 state->cr.last_write_time = BVAL(body, 24);
211 state->cr.change_time = BVAL(body, 32);
212 state->cr.allocation_size = BVAL(body, 40);
213 state->cr.end_of_file = BVAL(body, 48);
214 state->cr.file_attributes = IVAL(body, 56);
215 state->fid_persistent = BVAL(body, 64);
216 state->fid_volatile = BVAL(body, 72);
217
218 offset = IVAL(body, 80);
219 length = IVAL(body, 84);
220
221 if ((offset != 0) && (length != 0)) {
222 if ((offset != SMB2_HDR_BODY + 88) ||
223 (length > iov[2].iov_len)) {
224 tevent_req_nterror(
225 req, NT_STATUS_INVALID_NETWORK_RESPONSE);
226 return;
227 }
228 status = smb2_create_blob_parse(
229 state, data_blob_const(iov[2].iov_base, length),
230 &state->blobs);
231 if (tevent_req_nterror(req, status)) {
232 return;
233 }
234 }
235 tevent_req_done(req);
236}
237
238NTSTATUS smb2cli_create_recv(struct tevent_req *req,
239 uint64_t *fid_persistent,
240 uint64_t *fid_volatile,
241 struct smb_create_returns *cr,
242 TALLOC_CTX *mem_ctx,
243 struct smb2_create_blobs *blobs)
244{
245 struct smb2cli_create_state *state =
246 tevent_req_data(req,
247 struct smb2cli_create_state);
248 NTSTATUS status;
249
250 if (tevent_req_is_nterror(req, &status)) {
251 return status;
252 }
253 *fid_persistent = state->fid_persistent;
254 *fid_volatile = state->fid_volatile;
255 if (cr) {
256 *cr = state->cr;
257 }
258 if (blobs) {
259 blobs->num_blobs = state->blobs.num_blobs;
260 blobs->blobs = talloc_move(mem_ctx, &state->blobs.blobs);
261 }
262 return NT_STATUS_OK;
263}
264
265NTSTATUS smb2cli_create(struct smbXcli_conn *conn,
266 uint32_t timeout_msec,
267 struct smbXcli_session *session,
268 struct smbXcli_tcon *tcon,
269 const char *filename,
270 uint8_t oplock_level, /* SMB2_OPLOCK_LEVEL_* */
271 uint32_t impersonation_level, /* SMB2_IMPERSONATION_* */
272 uint32_t desired_access,
273 uint32_t file_attributes,
274 uint32_t share_access,
275 uint32_t create_disposition,
276 uint32_t create_options,
277 struct smb2_create_blobs *blobs,
278 uint64_t *fid_persistent,
279 uint64_t *fid_volatile,
280 struct smb_create_returns *cr,
281 TALLOC_CTX *mem_ctx,
282 struct smb2_create_blobs *ret_blobs)
283{
284 TALLOC_CTX *frame = talloc_stackframe();
285 struct tevent_context *ev;
286 struct tevent_req *req;
287 NTSTATUS status = NT_STATUS_NO_MEMORY;
288
289 if (smbXcli_conn_has_async_calls(conn)) {
290 /*
291 * Can't use sync call while an async call is in flight
292 */
293 status = NT_STATUS_INVALID_PARAMETER;
294 goto fail;
295 }
296 ev = samba_tevent_context_init(frame);
297 if (ev == NULL) {
298 goto fail;
299 }
300 req = smb2cli_create_send(frame, ev, conn, timeout_msec,
301 session, tcon,
302 filename, oplock_level,
303 impersonation_level, desired_access,
304 file_attributes, share_access,
305 create_disposition, create_options,
306 blobs);
307 if (req == NULL) {
308 goto fail;
309 }
310 if (!tevent_req_poll_ntstatus(req, ev, &status)) {
311 goto fail;
312 }
313 status = smb2cli_create_recv(req, fid_persistent, fid_volatile, cr,
314 mem_ctx, ret_blobs);
315 fail:
316 TALLOC_FREE(frame);
317 return status;
318}
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