source: vendor/3.5.5/source4/libcli/raw/rawreadwrite.c

Last change on this file was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 11.9 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 /* the transport layer needs to know that a readbraw is pending
108 and handle receives a little differently */
109 if (parms->generic.level == RAW_READ_READBRAW) {
110 tree->session->transport->readbraw_pending = 1;
111 }
112
113 return req;
114}
115
116/****************************************************************************
117 low level read operation (async recv)
118****************************************************************************/
119_PUBLIC_ NTSTATUS smb_raw_read_recv(struct smbcli_request *req, union smb_read *parms)
120{
121 if (!smbcli_request_receive(req) ||
122 smbcli_request_is_error(req)) {
123 goto failed;
124 }
125
126 switch (parms->generic.level) {
127 case RAW_READ_READBRAW:
128 parms->readbraw.out.nread = req->in.size - NBT_HDR_SIZE;
129 if (parms->readbraw.out.nread >
130 MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt)) {
131 req->status = NT_STATUS_BUFFER_TOO_SMALL;
132 goto failed;
133 }
134 memcpy(parms->readbraw.out.data, req->in.buffer + NBT_HDR_SIZE, parms->readbraw.out.nread);
135 break;
136
137 case RAW_READ_LOCKREAD:
138 SMBCLI_CHECK_WCT(req, 5);
139 parms->lockread.out.nread = SVAL(req->in.vwv, VWV(0));
140 if (parms->lockread.out.nread > parms->lockread.in.count ||
141 !smbcli_raw_pull_data(&req->in.bufinfo, req->in.data+3,
142 parms->lockread.out.nread, parms->lockread.out.data)) {
143 req->status = NT_STATUS_BUFFER_TOO_SMALL;
144 }
145 break;
146
147 case RAW_READ_READ:
148 /* there are 4 reserved words in the reply */
149 SMBCLI_CHECK_WCT(req, 5);
150 parms->read.out.nread = SVAL(req->in.vwv, VWV(0));
151 if (parms->read.out.nread > parms->read.in.count ||
152 !smbcli_raw_pull_data(&req->in.bufinfo, req->in.data+3,
153 parms->read.out.nread, parms->read.out.data)) {
154 req->status = NT_STATUS_BUFFER_TOO_SMALL;
155 }
156 break;
157
158 case RAW_READ_READX:
159 /* there are 5 reserved words in the reply */
160 SMBCLI_CHECK_WCT(req, 12);
161 parms->readx.out.remaining = SVAL(req->in.vwv, VWV(2));
162 parms->readx.out.compaction_mode = SVAL(req->in.vwv, VWV(3));
163 parms->readx.out.nread = SVAL(req->in.vwv, VWV(5));
164
165 /* handle oversize replies for non-chained readx replies with
166 CAP_LARGE_READX. The snia spec has must to answer for. */
167 if ((req->tree->session->transport->negotiate.capabilities & CAP_LARGE_READX)
168 && CVAL(req->in.vwv, VWV(0)) == SMB_CHAIN_NONE &&
169 req->in.size >= 0x10000) {
170 parms->readx.out.nread += (SVAL(req->in.vwv, VWV(7)) << 16);
171 if (req->in.hdr + SVAL(req->in.vwv, VWV(6)) +
172 parms->readx.out.nread <=
173 req->in.buffer + req->in.size) {
174 req->in.data_size += (SVAL(req->in.vwv, VWV(7)) << 16);
175
176 /* update the bufinfo with the new size */
177 smb_setup_bufinfo(req);
178 }
179 }
180
181 if (parms->readx.out.nread > MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt) ||
182 !smbcli_raw_pull_data(&req->in.bufinfo, req->in.hdr + SVAL(req->in.vwv, VWV(6)),
183 parms->readx.out.nread,
184 parms->readx.out.data)) {
185 req->status = NT_STATUS_BUFFER_TOO_SMALL;
186 }
187 break;
188
189 case RAW_READ_SMB2:
190 req->status = NT_STATUS_INTERNAL_ERROR;
191 break;
192 }
193
194failed:
195 return smbcli_request_destroy(req);
196}
197
198/****************************************************************************
199 low level read operation (sync interface)
200****************************************************************************/
201_PUBLIC_ NTSTATUS smb_raw_read(struct smbcli_tree *tree, union smb_read *parms)
202{
203 struct smbcli_request *req = smb_raw_read_send(tree, parms);
204 return smb_raw_read_recv(req, parms);
205}
206
207
208/****************************************************************************
209 raw write interface (async send)
210****************************************************************************/
211_PUBLIC_ struct smbcli_request *smb_raw_write_send(struct smbcli_tree *tree, union smb_write *parms)
212{
213 bool bigoffset = false;
214 struct smbcli_request *req = NULL;
215
216 switch (parms->generic.level) {
217 case RAW_WRITE_WRITEUNLOCK:
218 SETUP_REQUEST(SMBwriteunlock, 5, 3 + parms->writeunlock.in.count);
219 SSVAL(req->out.vwv, VWV(0), parms->writeunlock.in.file.fnum);
220 SSVAL(req->out.vwv, VWV(1), parms->writeunlock.in.count);
221 SIVAL(req->out.vwv, VWV(2), parms->writeunlock.in.offset);
222 SSVAL(req->out.vwv, VWV(4), parms->writeunlock.in.remaining);
223 SCVAL(req->out.data, 0, SMB_DATA_BLOCK);
224 SSVAL(req->out.data, 1, parms->writeunlock.in.count);
225 if (parms->writeunlock.in.count > 0) {
226 memcpy(req->out.data+3, parms->writeunlock.in.data,
227 parms->writeunlock.in.count);
228 }
229 break;
230
231 case RAW_WRITE_WRITE:
232 SETUP_REQUEST(SMBwrite, 5, 3 + parms->write.in.count);
233 SSVAL(req->out.vwv, VWV(0), parms->write.in.file.fnum);
234 SSVAL(req->out.vwv, VWV(1), parms->write.in.count);
235 SIVAL(req->out.vwv, VWV(2), parms->write.in.offset);
236 SSVAL(req->out.vwv, VWV(4), parms->write.in.remaining);
237 SCVAL(req->out.data, 0, SMB_DATA_BLOCK);
238 SSVAL(req->out.data, 1, parms->write.in.count);
239 if (parms->write.in.count > 0) {
240 memcpy(req->out.data+3, parms->write.in.data, parms->write.in.count);
241 }
242 break;
243
244 case RAW_WRITE_WRITECLOSE:
245 SETUP_REQUEST(SMBwriteclose, 6, 1 + parms->writeclose.in.count);
246 SSVAL(req->out.vwv, VWV(0), parms->writeclose.in.file.fnum);
247 SSVAL(req->out.vwv, VWV(1), parms->writeclose.in.count);
248 SIVAL(req->out.vwv, VWV(2), parms->writeclose.in.offset);
249 raw_push_dos_date3(tree->session->transport,
250 req->out.vwv, VWV(4), parms->writeclose.in.mtime);
251 SCVAL(req->out.data, 0, 0);
252 if (parms->writeclose.in.count > 0) {
253 memcpy(req->out.data+1, parms->writeclose.in.data,
254 parms->writeclose.in.count);
255 }
256 break;
257
258 case RAW_WRITE_WRITEX:
259 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
260 bigoffset = true;
261 }
262 SETUP_REQUEST(SMBwriteX, bigoffset ? 14 : 12, parms->writex.in.count);
263 SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
264 SSVAL(req->out.vwv, VWV(1), 0);
265 SSVAL(req->out.vwv, VWV(2), parms->writex.in.file.fnum);
266 SIVAL(req->out.vwv, VWV(3), parms->writex.in.offset);
267 SIVAL(req->out.vwv, VWV(5), 0); /* reserved */
268 SSVAL(req->out.vwv, VWV(7), parms->writex.in.wmode);
269 SSVAL(req->out.vwv, VWV(8), parms->writex.in.remaining);
270 SSVAL(req->out.vwv, VWV(9), parms->writex.in.count>>16);
271 SSVAL(req->out.vwv, VWV(10), parms->writex.in.count);
272 SSVAL(req->out.vwv, VWV(11), PTR_DIFF(req->out.data, req->out.hdr));
273 if (bigoffset) {
274 SIVAL(req->out.vwv,VWV(12),parms->writex.in.offset>>32);
275 }
276 if (parms->writex.in.count > 0) {
277 memcpy(req->out.data, parms->writex.in.data, parms->writex.in.count);
278 }
279 break;
280
281 case RAW_WRITE_SPLWRITE:
282 SETUP_REQUEST(SMBsplwr, 1, parms->splwrite.in.count);
283 SSVAL(req->out.vwv, VWV(0), parms->splwrite.in.file.fnum);
284 if (parms->splwrite.in.count > 0) {
285 memcpy(req->out.data, parms->splwrite.in.data, parms->splwrite.in.count);
286 }
287 break;
288
289 case RAW_WRITE_SMB2:
290 return NULL;
291 }
292
293 if (!smbcli_request_send(req)) {
294 smbcli_request_destroy(req);
295 return NULL;
296 }
297
298 return req;
299}
300
301
302/****************************************************************************
303 raw write interface (async recv)
304****************************************************************************/
305NTSTATUS smb_raw_write_recv(struct smbcli_request *req, union smb_write *parms)
306{
307 if (!smbcli_request_receive(req) ||
308 !NT_STATUS_IS_OK(req->status)) {
309 goto failed;
310 }
311
312 switch (parms->generic.level) {
313 case RAW_WRITE_WRITEUNLOCK:
314 SMBCLI_CHECK_WCT(req, 1);
315 parms->writeunlock.out.nwritten = SVAL(req->in.vwv, VWV(0));
316 break;
317 case RAW_WRITE_WRITE:
318 SMBCLI_CHECK_WCT(req, 1);
319 parms->write.out.nwritten = SVAL(req->in.vwv, VWV(0));
320 break;
321 case RAW_WRITE_WRITECLOSE:
322 SMBCLI_CHECK_WCT(req, 1);
323 parms->writeclose.out.nwritten = SVAL(req->in.vwv, VWV(0));
324 break;
325 case RAW_WRITE_WRITEX:
326 SMBCLI_CHECK_WCT(req, 6);
327 parms->writex.out.nwritten = SVAL(req->in.vwv, VWV(2));
328 parms->writex.out.nwritten += (CVAL(req->in.vwv, VWV(4)) << 16);
329 parms->writex.out.remaining = SVAL(req->in.vwv, VWV(3));
330 break;
331 case RAW_WRITE_SPLWRITE:
332 break;
333 case RAW_WRITE_SMB2:
334 req->status = NT_STATUS_INTERNAL_ERROR;
335 break;
336 }
337
338failed:
339 return smbcli_request_destroy(req);
340}
341
342/****************************************************************************
343 raw write interface (sync interface)
344****************************************************************************/
345_PUBLIC_ NTSTATUS smb_raw_write(struct smbcli_tree *tree, union smb_write *parms)
346{
347 struct smbcli_request *req = smb_raw_write_send(tree, parms);
348 return smb_raw_write_recv(req, parms);
349}
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