2 Unix SMB/CIFS implementation.
3 client file read/write routines
4 Copyright (C) Andrew Tridgell 1994-1998
5 Copyright (C) James Myers 2003
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 "libcli/raw/libcliraw.h"
24 #define SETUP_REQUEST(cmd, wct, buflen) do { \
25 req = smbcli_request_setup(tree, cmd, wct, buflen); \
26 if (!req) return NULL; \
29 /****************************************************************************
30 low level read operation (async send)
31 ****************************************************************************/
32 struct smbcli_request *smb_raw_read_send(struct smbcli_tree *tree, union smb_read *parms)
34 bool bigoffset = false;
35 struct smbcli_request *req = NULL;
37 switch (parms->generic.level) {
38 case RAW_READ_READBRAW:
39 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
42 SETUP_REQUEST(SMBreadbraw, bigoffset? 10:8, 0);
43 SSVAL(req->out.vwv, VWV(0), parms->readbraw.in.file.fnum);
44 SIVAL(req->out.vwv, VWV(1), parms->readbraw.in.offset);
45 SSVAL(req->out.vwv, VWV(3), parms->readbraw.in.maxcnt);
46 SSVAL(req->out.vwv, VWV(4), parms->readbraw.in.mincnt);
47 SIVAL(req->out.vwv, VWV(5), parms->readbraw.in.timeout);
48 SSVAL(req->out.vwv, VWV(7), 0); /* reserved */
50 SIVAL(req->out.vwv, VWV(8),parms->readbraw.in.offset>>32);
54 case RAW_READ_LOCKREAD:
55 SETUP_REQUEST(SMBlockread, 5, 0);
56 SSVAL(req->out.vwv, VWV(0), parms->lockread.in.file.fnum);
57 SSVAL(req->out.vwv, VWV(1), parms->lockread.in.count);
58 SIVAL(req->out.vwv, VWV(2), parms->lockread.in.offset);
59 SSVAL(req->out.vwv, VWV(4), parms->lockread.in.remaining);
63 SETUP_REQUEST(SMBread, 5, 0);
64 SSVAL(req->out.vwv, VWV(0), parms->read.in.file.fnum);
65 SSVAL(req->out.vwv, VWV(1), parms->read.in.count);
66 SIVAL(req->out.vwv, VWV(2), parms->read.in.offset);
67 SSVAL(req->out.vwv, VWV(4), parms->read.in.remaining);
71 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
74 SETUP_REQUEST(SMBreadX, bigoffset ? 12 : 10, 0);
75 SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
76 SSVAL(req->out.vwv, VWV(1), 0);
77 SSVAL(req->out.vwv, VWV(2), parms->readx.in.file.fnum);
78 SIVAL(req->out.vwv, VWV(3), parms->readx.in.offset);
79 SSVAL(req->out.vwv, VWV(5), parms->readx.in.maxcnt & 0xFFFF);
80 SSVAL(req->out.vwv, VWV(6), parms->readx.in.mincnt);
81 SIVAL(req->out.vwv, VWV(7), parms->readx.in.maxcnt >> 16);
82 SSVAL(req->out.vwv, VWV(9), parms->readx.in.remaining);
84 * TODO: give an error when the offset is 64 bit
85 * and the server doesn't support it
88 SIVAL(req->out.vwv, VWV(10),parms->readx.in.offset>>32);
90 if (parms->readx.in.read_for_execute) {
91 uint16_t flags2 = SVAL(req->out.hdr, HDR_FLG2);
92 flags2 |= FLAGS2_READ_PERMIT_EXECUTE;
93 SSVAL(req->out.hdr, HDR_FLG2, flags2);
101 if (!smbcli_request_send(req)) {
102 smbcli_request_destroy(req);
106 /* the transport layer needs to know that a readbraw is pending
107 and handle receives a little differently */
108 if (parms->generic.level == RAW_READ_READBRAW) {
109 tree->session->transport->readbraw_pending = 1;
115 /****************************************************************************
116 low level read operation (async recv)
117 ****************************************************************************/
118 NTSTATUS smb_raw_read_recv(struct smbcli_request *req, union smb_read *parms)
120 if (!smbcli_request_receive(req) ||
121 smbcli_request_is_error(req)) {
125 switch (parms->generic.level) {
126 case RAW_READ_READBRAW:
127 parms->readbraw.out.nread = req->in.size - NBT_HDR_SIZE;
128 if (parms->readbraw.out.nread >
129 MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt)) {
130 req->status = NT_STATUS_BUFFER_TOO_SMALL;
133 memcpy(parms->readbraw.out.data, req->in.buffer + NBT_HDR_SIZE, parms->readbraw.out.nread);
136 case RAW_READ_LOCKREAD:
137 SMBCLI_CHECK_WCT(req, 5);
138 parms->lockread.out.nread = SVAL(req->in.vwv, VWV(0));
139 if (parms->lockread.out.nread > parms->lockread.in.count ||
140 !smbcli_raw_pull_data(req, req->in.data+3,
141 parms->lockread.out.nread, parms->lockread.out.data)) {
142 req->status = NT_STATUS_BUFFER_TOO_SMALL;
147 /* there are 4 reserved words in the reply */
148 SMBCLI_CHECK_WCT(req, 5);
149 parms->read.out.nread = SVAL(req->in.vwv, VWV(0));
150 if (parms->read.out.nread > parms->read.in.count ||
151 !smbcli_raw_pull_data(req, req->in.data+3,
152 parms->read.out.nread, parms->read.out.data)) {
153 req->status = NT_STATUS_BUFFER_TOO_SMALL;
158 /* there are 5 reserved words in the reply */
159 SMBCLI_CHECK_WCT(req, 12);
160 parms->readx.out.remaining = SVAL(req->in.vwv, VWV(2));
161 parms->readx.out.compaction_mode = SVAL(req->in.vwv, VWV(3));
162 parms->readx.out.nread = SVAL(req->in.vwv, VWV(5));
164 /* handle oversize replies for non-chained readx replies with
165 CAP_LARGE_READX. The snia spec has must to answer for. */
166 if ((req->tree->session->transport->negotiate.capabilities & CAP_LARGE_READX)
167 && CVAL(req->in.vwv, VWV(0)) == SMB_CHAIN_NONE &&
168 req->in.size >= 0x10000) {
169 parms->readx.out.nread += (SVAL(req->in.vwv, VWV(7)) << 16);
170 if (req->in.hdr + SVAL(req->in.vwv, VWV(6)) +
171 parms->readx.out.nread <=
172 req->in.buffer + req->in.size) {
173 req->in.data_size += (SVAL(req->in.vwv, VWV(7)) << 16);
177 if (parms->readx.out.nread > MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt) ||
178 !smbcli_raw_pull_data(req, 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;
186 req->status = NT_STATUS_INTERNAL_ERROR;
191 return smbcli_request_destroy(req);
194 /****************************************************************************
195 low level read operation (sync interface)
196 ****************************************************************************/
197 NTSTATUS smb_raw_read(struct smbcli_tree *tree, union smb_read *parms)
199 struct smbcli_request *req = smb_raw_read_send(tree, parms);
200 return smb_raw_read_recv(req, parms);
204 /****************************************************************************
205 raw write interface (async send)
206 ****************************************************************************/
207 struct smbcli_request *smb_raw_write_send(struct smbcli_tree *tree, union smb_write *parms)
209 bool bigoffset = false;
210 struct smbcli_request *req = NULL;
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);
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);
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);
254 case RAW_WRITE_WRITEX:
255 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
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));
270 SIVAL(req->out.vwv,VWV(12),parms->writex.in.offset>>32);
272 if (parms->writex.in.count > 0) {
273 memcpy(req->out.data, parms->writex.in.data, parms->writex.in.count);
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);
289 if (!smbcli_request_send(req)) {
290 smbcli_request_destroy(req);
298 /****************************************************************************
299 raw write interface (async recv)
300 ****************************************************************************/
301 NTSTATUS smb_raw_write_recv(struct smbcli_request *req, union smb_write *parms)
303 if (!smbcli_request_receive(req) ||
304 smbcli_request_is_error(req)) {
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));
313 case RAW_WRITE_WRITE:
314 SMBCLI_CHECK_WCT(req, 1);
315 parms->write.out.nwritten = SVAL(req->in.vwv, VWV(0));
317 case RAW_WRITE_WRITECLOSE:
318 SMBCLI_CHECK_WCT(req, 1);
319 parms->writeclose.out.nwritten = SVAL(req->in.vwv, VWV(0));
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));
327 case RAW_WRITE_SPLWRITE:
330 req->status = NT_STATUS_INTERNAL_ERROR;
335 return smbcli_request_destroy(req);
338 /****************************************************************************
339 raw write interface (sync interface)
340 ****************************************************************************/
341 NTSTATUS smb_raw_write(struct smbcli_tree *tree, union smb_write *parms)
343 struct smbcli_request *req = smb_raw_write_send(tree, parms);
344 return smb_raw_write_recv(req, parms);