2 Unix SMB/CIFS implementation.
5 Copyright (C) Stefan Metzmacher 2009
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "smbd/globals.h"
23 #include "../libcli/smb/smb_common.h"
25 static struct tevent_req
*smbd_smb2_read_send(TALLOC_CTX
*mem_ctx
,
26 struct tevent_context
*ev
,
27 struct smbd_smb2_request
*smb2req
,
29 uint64_t in_file_id_volatile
,
33 uint32_t in_remaining
);
34 static NTSTATUS
smbd_smb2_read_recv(struct tevent_req
*req
,
37 uint32_t *out_remaining
);
39 static void smbd_smb2_request_read_done(struct tevent_req
*subreq
);
40 NTSTATUS
smbd_smb2_request_process_read(struct smbd_smb2_request
*req
)
43 const uint8_t *inbody
;
44 int i
= req
->current_idx
;
45 size_t expected_body_size
= 0x31;
50 uint64_t in_file_id_persistent
;
51 uint64_t in_file_id_volatile
;
52 uint32_t in_minimum_count
;
53 uint32_t in_remaining_bytes
;
54 struct tevent_req
*subreq
;
56 inhdr
= (const uint8_t *)req
->in
.vector
[i
+0].iov_base
;
57 if (req
->in
.vector
[i
+1].iov_len
!= (expected_body_size
& 0xFFFFFFFE)) {
58 return smbd_smb2_request_error(req
, NT_STATUS_INVALID_PARAMETER
);
61 inbody
= (const uint8_t *)req
->in
.vector
[i
+1].iov_base
;
63 body_size
= SVAL(inbody
, 0x00);
64 if (body_size
!= expected_body_size
) {
65 return smbd_smb2_request_error(req
, NT_STATUS_INVALID_PARAMETER
);
68 in_smbpid
= IVAL(inhdr
, SMB2_HDR_PID
);
70 in_length
= IVAL(inbody
, 0x04);
71 in_offset
= BVAL(inbody
, 0x08);
72 in_file_id_persistent
= BVAL(inbody
, 0x10);
73 in_file_id_volatile
= BVAL(inbody
, 0x18);
74 in_minimum_count
= IVAL(inbody
, 0x20);
75 in_remaining_bytes
= IVAL(inbody
, 0x28);
77 /* check the max read size */
78 if (in_length
> lp_smb2_max_read()) {
79 DEBUG(0,("here:%s: 0x%08X: 0x%08X\n",
80 __location__
, in_length
, lp_smb2_max_read()));
81 return smbd_smb2_request_error(req
, NT_STATUS_INVALID_PARAMETER
);
84 if (req
->compat_chain_fsp
) {
86 } else if (in_file_id_persistent
!= in_file_id_volatile
) {
87 return smbd_smb2_request_error(req
, NT_STATUS_FILE_CLOSED
);
90 subreq
= smbd_smb2_read_send(req
,
91 req
->sconn
->smb2
.event_ctx
,
100 return smbd_smb2_request_error(req
, NT_STATUS_NO_MEMORY
);
102 tevent_req_set_callback(subreq
, smbd_smb2_request_read_done
, req
);
104 return smbd_smb2_request_pending_queue(req
, subreq
);
107 static void smbd_smb2_request_read_done(struct tevent_req
*subreq
)
109 struct smbd_smb2_request
*req
= tevent_req_callback_data(subreq
,
110 struct smbd_smb2_request
);
111 int i
= req
->current_idx
;
115 uint8_t out_data_offset
;
116 DATA_BLOB out_data_buffer
= data_blob_null
;
117 uint32_t out_data_remaining
= 0;
119 NTSTATUS error
; /* transport error */
121 status
= smbd_smb2_read_recv(subreq
,
124 &out_data_remaining
);
126 if (!NT_STATUS_IS_OK(status
)) {
127 error
= smbd_smb2_request_error(req
, status
);
128 if (!NT_STATUS_IS_OK(error
)) {
129 smbd_server_connection_terminate(req
->sconn
,
136 out_data_offset
= SMB2_HDR_BODY
+ 0x10;
138 outhdr
= (uint8_t *)req
->out
.vector
[i
].iov_base
;
140 outbody
= data_blob_talloc(req
->out
.vector
, NULL
, 0x10);
141 if (outbody
.data
== NULL
) {
142 error
= smbd_smb2_request_error(req
, NT_STATUS_NO_MEMORY
);
143 if (!NT_STATUS_IS_OK(error
)) {
144 smbd_server_connection_terminate(req
->sconn
,
151 SSVAL(outbody
.data
, 0x00, 0x10 + 1); /* struct size */
152 SCVAL(outbody
.data
, 0x02,
153 out_data_offset
); /* data offset */
154 SCVAL(outbody
.data
, 0x03, 0); /* reserved */
155 SIVAL(outbody
.data
, 0x04,
156 out_data_buffer
.length
); /* data length */
157 SIVAL(outbody
.data
, 0x08,
158 out_data_remaining
); /* data remaining */
159 SIVAL(outbody
.data
, 0x0C, 0); /* reserved */
161 outdyn
= out_data_buffer
;
163 error
= smbd_smb2_request_done(req
, outbody
, &outdyn
);
164 if (!NT_STATUS_IS_OK(error
)) {
165 smbd_server_connection_terminate(req
->sconn
,
171 struct smbd_smb2_read_state
{
172 struct smbd_smb2_request
*smb2req
;
174 uint32_t out_remaining
;
177 static void smbd_smb2_read_pipe_done(struct tevent_req
*subreq
);
179 static struct tevent_req
*smbd_smb2_read_send(TALLOC_CTX
*mem_ctx
,
180 struct tevent_context
*ev
,
181 struct smbd_smb2_request
*smb2req
,
183 uint64_t in_file_id_volatile
,
187 uint32_t in_remaining
)
189 struct tevent_req
*req
;
190 struct smbd_smb2_read_state
*state
;
191 struct smb_request
*smbreq
;
192 connection_struct
*conn
= smb2req
->tcon
->compat_conn
;
195 struct lock_struct lock
;
197 req
= tevent_req_create(mem_ctx
, &state
,
198 struct smbd_smb2_read_state
);
202 state
->smb2req
= smb2req
;
203 state
->out_data
= data_blob_null
;
204 state
->out_remaining
= 0;
206 DEBUG(10,("smbd_smb2_read: file_id[0x%016llX]\n",
207 (unsigned long long)in_file_id_volatile
));
209 smbreq
= smbd_smb2_fake_smb_request(smb2req
);
210 if (tevent_req_nomem(smbreq
, req
)) {
211 return tevent_req_post(req
, ev
);
214 fsp
= file_fsp(smbreq
, (uint16_t)in_file_id_volatile
);
216 tevent_req_nterror(req
, NT_STATUS_FILE_CLOSED
);
217 return tevent_req_post(req
, ev
);
219 if (conn
!= fsp
->conn
) {
220 tevent_req_nterror(req
, NT_STATUS_FILE_CLOSED
);
221 return tevent_req_post(req
, ev
);
223 if (smb2req
->session
->vuid
!= fsp
->vuid
) {
224 tevent_req_nterror(req
, NT_STATUS_FILE_CLOSED
);
225 return tevent_req_post(req
, ev
);
227 if (fsp
->is_directory
) {
228 tevent_req_nterror(req
, NT_STATUS_INVALID_DEVICE_REQUEST
);
229 return tevent_req_post(req
, ev
);
232 state
->out_data
= data_blob_talloc(state
, NULL
, in_length
);
233 if (in_length
> 0 && tevent_req_nomem(state
->out_data
.data
, req
)) {
234 return tevent_req_post(req
, ev
);
237 if (IS_IPC(smbreq
->conn
)) {
238 struct tevent_req
*subreq
;
240 if (!fsp_is_np(fsp
)) {
241 tevent_req_nterror(req
, NT_STATUS_FILE_CLOSED
);
242 return tevent_req_post(req
, ev
);
245 subreq
= np_read_send(state
, smbd_event_context(),
246 fsp
->fake_file_handle
,
247 state
->out_data
.data
,
248 state
->out_data
.length
);
249 if (tevent_req_nomem(subreq
, req
)) {
250 return tevent_req_post(req
, ev
);
252 tevent_req_set_callback(subreq
,
253 smbd_smb2_read_pipe_done
,
258 if (!CHECK_READ(fsp
, smbreq
)) {
259 tevent_req_nterror(req
, NT_STATUS_ACCESS_DENIED
);
260 return tevent_req_post(req
, ev
);
263 init_strict_lock_struct(fsp
,
270 if (!SMB_VFS_STRICT_LOCK(conn
, fsp
, &lock
)) {
271 tevent_req_nterror(req
, NT_STATUS_FILE_LOCK_CONFLICT
);
272 return tevent_req_post(req
, ev
);
275 nread
= read_file(fsp
,
276 (char *)state
->out_data
.data
,
280 SMB_VFS_STRICT_UNLOCK(conn
, fsp
, &lock
);
282 DEBUG(10,("smbd_smb2_read: file %s handle [0x%016llX] offset=%llu "
283 "len=%llu returned %lld\n",
285 (unsigned long long)in_file_id_volatile
,
286 (unsigned long long)in_offset
,
287 (unsigned long long)in_length
,
291 DEBUG(5,("smbd_smb2_read: read_file[%s] nread[%lld]\n",
292 fsp_str_dbg(fsp
), (long long)nread
));
293 tevent_req_nterror(req
, NT_STATUS_ACCESS_DENIED
);
294 return tevent_req_post(req
, ev
);
296 if (nread
== 0 && in_length
!= 0) {
297 DEBUG(5,("smbd_smb2_read: read_file[%s] end of file\n",
299 tevent_req_nterror(req
, NT_STATUS_END_OF_FILE
);
300 return tevent_req_post(req
, ev
);
303 if (nread
< in_minimum
) {
304 DEBUG(5,("smbd_smb2_read: read_file[%s] read less %d than "
305 "minimum requested %u. Returning end of file\n",
308 (unsigned int)in_minimum
));
309 tevent_req_nterror(req
, NT_STATUS_END_OF_FILE
);
310 return tevent_req_post(req
, ev
);
313 DEBUG(3,("smbd_smb2_read: fnum=[%d/%s] length=%lu offset=%lu read=%lu\n",
314 fsp
->fnum
, fsp_str_dbg(fsp
),
315 (unsigned long)in_length
,
316 (unsigned long)in_offset
,
317 (unsigned long)nread
));
319 state
->out_data
.length
= nread
;
320 state
->out_remaining
= 0;
321 tevent_req_done(req
);
322 return tevent_req_post(req
, ev
);
325 static void smbd_smb2_read_pipe_done(struct tevent_req
*subreq
)
327 struct tevent_req
*req
= tevent_req_callback_data(subreq
,
329 struct smbd_smb2_read_state
*state
= tevent_req_data(req
,
330 struct smbd_smb2_read_state
);
333 bool is_data_outstanding
;
335 status
= np_read_recv(subreq
, &nread
, &is_data_outstanding
);
337 if (!NT_STATUS_IS_OK(status
)) {
338 tevent_req_nterror(req
, status
);
342 if (nread
== 0 && state
->out_data
.length
!= 0) {
343 tevent_req_nterror(req
, NT_STATUS_END_OF_FILE
);
347 state
->out_data
.length
= nread
;
348 state
->out_remaining
= 0;
350 tevent_req_done(req
);
353 static NTSTATUS
smbd_smb2_read_recv(struct tevent_req
*req
,
356 uint32_t *out_remaining
)
359 struct smbd_smb2_read_state
*state
= tevent_req_data(req
,
360 struct smbd_smb2_read_state
);
362 if (tevent_req_is_nterror(req
, &status
)) {
363 tevent_req_received(req
);
367 *out_data
= state
->out_data
;
368 talloc_steal(mem_ctx
, out_data
->data
);
369 *out_remaining
= state
->out_remaining
;
371 tevent_req_received(req
);