source: vendor/current/source4/libcli/raw/rawreadwrite.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: 11.8 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3 client file read/write routines
4 Copyright (C) Andrew Tridgell 1994-1998
5 Copyright (C) James Myers 2003
6
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.
11
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.
16
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/>.
19*/
20
21#include "includes.h"
22#include "libcli/raw/libcliraw.h"
23#include "libcli/raw/raw_proto.h"
24
25#define SETUP_REQUEST(cmd, wct, buflen) do { \
26 req = smbcli_request_setup(tree, cmd, wct, buflen); \
27 if (!req) return NULL; \
28} while (0)
29
30/****************************************************************************
31 low level read operation (async send)
32****************************************************************************/
33_PUBLIC_ struct smbcli_request *smb_raw_read_send(struct smbcli_tree *tree, union smb_read *parms)
34{
35 bool bigoffset = false;
36 struct smbcli_request *req = NULL;
37
38 switch (parms->generic.level) {
39 case RAW_READ_READBRAW:
40 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
41 bigoffset = true;
42 }
43 SETUP_REQUEST(SMBreadbraw, bigoffset? 10:8, 0);
44 SSVAL(req->out.vwv, VWV(0), parms->readbraw.in.file.fnum);
45 SIVAL(req->out.vwv, VWV(1), parms->readbraw.in.offset);
46 SSVAL(req->out.vwv, VWV(3), parms->readbraw.in.maxcnt);
47 SSVAL(req->out.vwv, VWV(4), parms->readbraw.in.mincnt);
48 SIVAL(req->out.vwv, VWV(5), parms->readbraw.in.timeout);
49 SSVAL(req->out.vwv, VWV(7), 0); /* reserved */
50 if (bigoffset) {
51 SIVAL(req->out.vwv, VWV(8),parms->readbraw.in.offset>>32);
52 }
53 break;
54
55 case RAW_READ_LOCKREAD:
56 SETUP_REQUEST(SMBlockread, 5, 0);
57 SSVAL(req->out.vwv, VWV(0), parms->lockread.in.file.fnum);
58 SSVAL(req->out.vwv, VWV(1), parms->lockread.in.count);
59 SIVAL(req->out.vwv, VWV(2), parms->lockread.in.offset);
60 SSVAL(req->out.vwv, VWV(4), parms->lockread.in.remaining);
61 break;
62
63 case RAW_READ_READ:
64 SETUP_REQUEST(SMBread, 5, 0);
65 SSVAL(req->out.vwv, VWV(0), parms->read.in.file.fnum);
66 SSVAL(req->out.vwv, VWV(1), parms->read.in.count);
67 SIVAL(req->out.vwv, VWV(2), parms->read.in.offset);
68 SSVAL(req->out.vwv, VWV(4), parms->read.in.remaining);
69 break;
70
71 case RAW_READ_READX:
72 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
73 bigoffset = true;
74 }
75 SETUP_REQUEST(SMBreadX, bigoffset ? 12 : 10, 0);
76 SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
77 SSVAL(req->out.vwv, VWV(1), 0);
78 SSVAL(req->out.vwv, VWV(2), parms->readx.in.file.fnum);
79 SIVAL(req->out.vwv, VWV(3), parms->readx.in.offset);
80 SSVAL(req->out.vwv, VWV(5), parms->readx.in.maxcnt & 0xFFFF);
81 SSVAL(req->out.vwv, VWV(6), parms->readx.in.mincnt);
82 SIVAL(req->out.vwv, VWV(7), parms->readx.in.maxcnt >> 16);
83 SSVAL(req->out.vwv, VWV(9), parms->readx.in.remaining);
84 /*
85 * TODO: give an error when the offset is 64 bit
86 * and the server doesn't support it
87 */
88 if (bigoffset) {
89 SIVAL(req->out.vwv, VWV(10),parms->readx.in.offset>>32);
90 }
91 if (parms->readx.in.read_for_execute) {
92 uint16_t flags2 = SVAL(req->out.hdr, HDR_FLG2);
93 flags2 |= FLAGS2_READ_PERMIT_EXECUTE;
94 SSVAL(req->out.hdr, HDR_FLG2, flags2);
95 }
96 break;
97
98 case RAW_READ_SMB2:
99 return NULL;
100 }
101
102 if (!smbcli_request_send(req)) {
103 smbcli_request_destroy(req);
104 return NULL;
105 }
106
107 return req;
108}
109
110/****************************************************************************
111 low level read operation (async recv)
112****************************************************************************/
113_PUBLIC_ NTSTATUS smb_raw_read_recv(struct smbcli_request *req, union smb_read *parms)
114{
115 if (!smbcli_request_receive(req) ||
116 smbcli_request_is_error(req)) {
117 goto failed;
118 }
119
120 switch (parms->generic.level) {
121 case RAW_READ_READBRAW:
122 parms->readbraw.out.nread = req->in.size - NBT_HDR_SIZE;
123 if (parms->readbraw.out.nread >
124 MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt)) {
125 req->status = NT_STATUS_BUFFER_TOO_SMALL;
126 goto failed;
127 }
128 memcpy(parms->readbraw.out.data, req->in.buffer + NBT_HDR_SIZE, parms->readbraw.out.nread);
129 break;
130
131 case RAW_READ_LOCKREAD:
132 SMBCLI_CHECK_WCT(req, 5);
133 parms->lockread.out.nread = SVAL(req->in.vwv, VWV(0));
134 if (parms->lockread.out.nread > parms->lockread.in.count ||
135 !smbcli_raw_pull_data(&req->in.bufinfo, req->in.data+3,
136 parms->lockread.out.nread, parms->lockread.out.data)) {
137 req->status = NT_STATUS_BUFFER_TOO_SMALL;
138 }
139 break;
140
141 case RAW_READ_READ:
142 /* there are 4 reserved words in the reply */
143 SMBCLI_CHECK_WCT(req, 5);
144 parms->read.out.nread = SVAL(req->in.vwv, VWV(0));
145 if (parms->read.out.nread > parms->read.in.count ||
146 !smbcli_raw_pull_data(&req->in.bufinfo, req->in.data+3,
147 parms->read.out.nread, parms->read.out.data)) {
148 req->status = NT_STATUS_BUFFER_TOO_SMALL;
149 }
150 break;
151
152 case RAW_READ_READX:
153 /* there are 5 reserved words in the reply */
154 SMBCLI_CHECK_WCT(req, 12);
155 parms->readx.out.remaining = SVAL(req->in.vwv, VWV(2));
156 parms->readx.out.compaction_mode = SVAL(req->in.vwv, VWV(3));
157 parms->readx.out.nread = SVAL(req->in.vwv, VWV(5));
158 parms->readx.out.flags2 = req->flags2;
159 parms->readx.out.data_offset = SVAL(req->in.vwv, VWV(6));
160
161 /* handle oversize replies for non-chained readx replies with
162 CAP_LARGE_READX. The snia spec has must to answer for. */
163 if ((req->tree->session->transport->negotiate.capabilities & CAP_LARGE_READX)
164 && CVAL(req->in.vwv, VWV(0)) == SMB_CHAIN_NONE &&
165 req->in.size >= 0x10000) {
166 parms->readx.out.nread += (SVAL(req->in.vwv, VWV(7)) << 16);
167 if (req->in.hdr + SVAL(req->in.vwv, VWV(6)) +
168 parms->readx.out.nread <=
169 req->in.buffer + req->in.size) {
170 req->in.data_size += (SVAL(req->in.vwv, VWV(7)) << 16);
171
172 /* update the bufinfo with the new size */
173 smb_setup_bufinfo(req);
174 }
175 }
176
177 if (parms->readx.out.nread > MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt) ||
178 !smbcli_raw_pull_data(&req->in.bufinfo, req->in.hdr + SVAL(req->in.vwv, VWV(6)),
179 parms->readx.out.nread,
180 parms->readx.out.data)) {
181 req->status = NT_STATUS_BUFFER_TOO_SMALL;
182 }
183 break;
184
185 case RAW_READ_SMB2:
186 req->status = NT_STATUS_INTERNAL_ERROR;
187 break;
188 }
189
190failed:
191 return smbcli_request_destroy(req);
192}
193
194/****************************************************************************
195 low level read operation (sync interface)
196****************************************************************************/
197_PUBLIC_ NTSTATUS smb_raw_read(struct smbcli_tree *tree, union smb_read *parms)
198{
199 struct smbcli_request *req = smb_raw_read_send(tree, parms);
200 return smb_raw_read_recv(req, parms);
201}
202
203
204/****************************************************************************
205 raw write interface (async send)
206****************************************************************************/
207_PUBLIC_ struct smbcli_request *smb_raw_write_send(struct smbcli_tree *tree, union smb_write *parms)
208{
209 bool bigoffset = false;
210 struct smbcli_request *req = NULL;
211
212 switch (parms->generic.level) {
213 case RAW_WRITE_WRITEUNLOCK:
214 SETUP_REQUEST(SMBwriteunlock, 5, 3 + parms->writeunlock.in.count);
215 SSVAL(req->out.vwv, VWV(0), parms->writeunlock.in.file.fnum);
216 SSVAL(req->out.vwv, VWV(1), parms->writeunlock.in.count);
217 SIVAL(req->out.vwv, VWV(2), parms->writeunlock.in.offset);
218 SSVAL(req->out.vwv, VWV(4), parms->writeunlock.in.remaining);
219 SCVAL(req->out.data, 0, SMB_DATA_BLOCK);
220 SSVAL(req->out.data, 1, parms->writeunlock.in.count);
221 if (parms->writeunlock.in.count > 0) {
222 memcpy(req->out.data+3, parms->writeunlock.in.data,
223 parms->writeunlock.in.count);
224 }
225 break;
226
227 case RAW_WRITE_WRITE:
228 SETUP_REQUEST(SMBwrite, 5, 3 + parms->write.in.count);
229 SSVAL(req->out.vwv, VWV(0), parms->write.in.file.fnum);
230 SSVAL(req->out.vwv, VWV(1), parms->write.in.count);
231 SIVAL(req->out.vwv, VWV(2), parms->write.in.offset);
232 SSVAL(req->out.vwv, VWV(4), parms->write.in.remaining);
233 SCVAL(req->out.data, 0, SMB_DATA_BLOCK);
234 SSVAL(req->out.data, 1, parms->write.in.count);
235 if (parms->write.in.count > 0) {
236 memcpy(req->out.data+3, parms->write.in.data, parms->write.in.count);
237 }
238 break;
239
240 case RAW_WRITE_WRITECLOSE:
241 SETUP_REQUEST(SMBwriteclose, 6, 1 + parms->writeclose.in.count);
242 SSVAL(req->out.vwv, VWV(0), parms->writeclose.in.file.fnum);
243 SSVAL(req->out.vwv, VWV(1), parms->writeclose.in.count);
244 SIVAL(req->out.vwv, VWV(2), parms->writeclose.in.offset);
245 raw_push_dos_date3(tree->session->transport,
246 req->out.vwv, VWV(4), parms->writeclose.in.mtime);
247 SCVAL(req->out.data, 0, 0);
248 if (parms->writeclose.in.count > 0) {
249 memcpy(req->out.data+1, parms->writeclose.in.data,
250 parms->writeclose.in.count);
251 }
252 break;
253
254 case RAW_WRITE_WRITEX:
255 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
256 bigoffset = true;
257 }
258 SETUP_REQUEST(SMBwriteX, bigoffset ? 14 : 12, parms->writex.in.count);
259 SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
260 SSVAL(req->out.vwv, VWV(1), 0);
261 SSVAL(req->out.vwv, VWV(2), parms->writex.in.file.fnum);
262 SIVAL(req->out.vwv, VWV(3), parms->writex.in.offset);
263 SIVAL(req->out.vwv, VWV(5), 0); /* reserved */
264 SSVAL(req->out.vwv, VWV(7), parms->writex.in.wmode);
265 SSVAL(req->out.vwv, VWV(8), parms->writex.in.remaining);
266 SSVAL(req->out.vwv, VWV(9), parms->writex.in.count>>16);
267 SSVAL(req->out.vwv, VWV(10), parms->writex.in.count);
268 SSVAL(req->out.vwv, VWV(11), PTR_DIFF(req->out.data, req->out.hdr));
269 if (bigoffset) {
270 SIVAL(req->out.vwv,VWV(12),parms->writex.in.offset>>32);
271 }
272 if (parms->writex.in.count > 0) {
273 memcpy(req->out.data, parms->writex.in.data, parms->writex.in.count);
274 }
275 break;
276
277 case RAW_WRITE_SPLWRITE:
278 SETUP_REQUEST(SMBsplwr, 1, parms->splwrite.in.count);
279 SSVAL(req->out.vwv, VWV(0), parms->splwrite.in.file.fnum);
280 if (parms->splwrite.in.count > 0) {
281 memcpy(req->out.data, parms->splwrite.in.data, parms->splwrite.in.count);
282 }
283 break;
284
285 case RAW_WRITE_SMB2:
286 return NULL;
287 }
288
289 if (!smbcli_request_send(req)) {
290 smbcli_request_destroy(req);
291 return NULL;
292 }
293
294 return req;
295}
296
297
298/****************************************************************************
299 raw write interface (async recv)
300****************************************************************************/
301_PUBLIC_ NTSTATUS smb_raw_write_recv(struct smbcli_request *req, union smb_write *parms)
302{
303 if (!smbcli_request_receive(req) ||
304 !NT_STATUS_IS_OK(req->status)) {
305 goto failed;
306 }
307
308 switch (parms->generic.level) {
309 case RAW_WRITE_WRITEUNLOCK:
310 SMBCLI_CHECK_WCT(req, 1);
311 parms->writeunlock.out.nwritten = SVAL(req->in.vwv, VWV(0));
312 break;
313 case RAW_WRITE_WRITE:
314 SMBCLI_CHECK_WCT(req, 1);
315 parms->write.out.nwritten = SVAL(req->in.vwv, VWV(0));
316 break;
317 case RAW_WRITE_WRITECLOSE:
318 SMBCLI_CHECK_WCT(req, 1);
319 parms->writeclose.out.nwritten = SVAL(req->in.vwv, VWV(0));
320 break;
321 case RAW_WRITE_WRITEX:
322 SMBCLI_CHECK_WCT(req, 6);
323 parms->writex.out.nwritten = SVAL(req->in.vwv, VWV(2));
324 parms->writex.out.nwritten += (CVAL(req->in.vwv, VWV(4)) << 16);
325 parms->writex.out.remaining = SVAL(req->in.vwv, VWV(3));
326 break;
327 case RAW_WRITE_SPLWRITE:
328 break;
329 case RAW_WRITE_SMB2:
330 req->status = NT_STATUS_INTERNAL_ERROR;
331 break;
332 }
333
334failed:
335 return smbcli_request_destroy(req);
336}
337
338/****************************************************************************
339 raw write interface (sync interface)
340****************************************************************************/
341_PUBLIC_ NTSTATUS smb_raw_write(struct smbcli_tree *tree, union smb_write *parms)
342{
343 struct smbcli_request *req = smb_raw_write_send(tree, parms);
344 return smb_raw_write_recv(req, parms);
345}
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