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 2 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, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include "libcli/raw/libcliraw.h"
25 #define SETUP_REQUEST(cmd, wct, buflen) do { \
26 req = smbcli_request_setup(tree, cmd, wct, buflen); \
27 if (!req) return NULL; \
30 /****************************************************************************
31 low level read operation (async send)
32 ****************************************************************************/
33 struct smbcli_request *smb_raw_read_send(struct smbcli_tree *tree, union smb_read *parms)
35 BOOL bigoffset = False;
36 struct smbcli_request *req = NULL;
38 switch (parms->generic.level) {
39 case RAW_READ_READBRAW:
40 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
43 SETUP_REQUEST(SMBreadbraw, bigoffset? 10:8, 0);
44 SSVAL(req->out.vwv, VWV(0), parms->readbraw.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 */
51 SIVAL(req->out.vwv, VWV(8),parms->readbraw.in.offset>>32);
55 case RAW_READ_LOCKREAD:
56 SETUP_REQUEST(SMBlockread, 5, 0);
57 SSVAL(req->out.vwv, VWV(0), parms->lockread.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);
64 SETUP_REQUEST(SMBread, 5, 0);
65 SSVAL(req->out.vwv, VWV(0), parms->read.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);
72 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
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.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);
85 SIVAL(req->out.vwv, VWV(10),parms->readx.in.offset>>32);
90 if (!smbcli_request_send(req)) {
91 smbcli_request_destroy(req);
95 /* the transport layer needs to know that a readbraw is pending
96 and handle receives a little differently */
97 if (parms->generic.level == RAW_READ_READBRAW) {
98 tree->session->transport->readbraw_pending = 1;
104 /****************************************************************************
105 low level read operation (async recv)
106 ****************************************************************************/
107 NTSTATUS smb_raw_read_recv(struct smbcli_request *req, union smb_read *parms)
109 if (!smbcli_request_receive(req) ||
110 smbcli_request_is_error(req)) {
114 switch (parms->generic.level) {
115 case RAW_READ_READBRAW:
116 parms->readbraw.out.nread = req->in.size - NBT_HDR_SIZE;
117 if (parms->readbraw.out.nread >
118 MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt)) {
119 req->status = NT_STATUS_BUFFER_TOO_SMALL;
122 memcpy(parms->readbraw.out.data, req->in.buffer + NBT_HDR_SIZE, parms->readbraw.out.nread);
125 case RAW_READ_LOCKREAD:
126 SMBCLI_CHECK_WCT(req, 5);
127 parms->lockread.out.nread = SVAL(req->in.vwv, VWV(0));
128 if (parms->lockread.out.nread > parms->lockread.in.count ||
129 !smbcli_raw_pull_data(req, req->in.data+3,
130 parms->lockread.out.nread, parms->lockread.out.data)) {
131 req->status = NT_STATUS_BUFFER_TOO_SMALL;
136 /* there are 4 reserved words in the reply */
137 SMBCLI_CHECK_WCT(req, 5);
138 parms->read.out.nread = SVAL(req->in.vwv, VWV(0));
139 if (parms->read.out.nread > parms->read.in.count ||
140 !smbcli_raw_pull_data(req, req->in.data+3,
141 parms->read.out.nread, parms->read.out.data)) {
142 req->status = NT_STATUS_BUFFER_TOO_SMALL;
147 /* there are 5 reserved words in the reply */
148 SMBCLI_CHECK_WCT(req, 12);
149 parms->readx.out.remaining = SVAL(req->in.vwv, VWV(2));
150 parms->readx.out.compaction_mode = SVAL(req->in.vwv, VWV(3));
151 parms->readx.out.nread = SVAL(req->in.vwv, VWV(5));
152 if (parms->readx.out.nread > MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt) ||
153 !smbcli_raw_pull_data(req, req->in.hdr + SVAL(req->in.vwv, VWV(6)),
154 parms->readx.out.nread,
155 parms->readx.out.data)) {
156 req->status = NT_STATUS_BUFFER_TOO_SMALL;
162 return smbcli_request_destroy(req);
165 /****************************************************************************
166 low level read operation (sync interface)
167 ****************************************************************************/
168 NTSTATUS smb_raw_read(struct smbcli_tree *tree, union smb_read *parms)
170 struct smbcli_request *req = smb_raw_read_send(tree, parms);
171 return smb_raw_read_recv(req, parms);
175 /****************************************************************************
176 raw write interface (async send)
177 ****************************************************************************/
178 struct smbcli_request *smb_raw_write_send(struct smbcli_tree *tree, union smb_write *parms)
180 BOOL bigoffset = False;
181 struct smbcli_request *req = NULL;
183 switch (parms->generic.level) {
184 case RAW_WRITE_WRITEUNLOCK:
185 SETUP_REQUEST(SMBwriteunlock, 5, 3 + parms->writeunlock.in.count);
186 SSVAL(req->out.vwv, VWV(0), parms->writeunlock.file.fnum);
187 SSVAL(req->out.vwv, VWV(1), parms->writeunlock.in.count);
188 SIVAL(req->out.vwv, VWV(2), parms->writeunlock.in.offset);
189 SSVAL(req->out.vwv, VWV(4), parms->writeunlock.in.remaining);
190 SCVAL(req->out.data, 0, SMB_DATA_BLOCK);
191 SSVAL(req->out.data, 1, parms->writeunlock.in.count);
192 if (parms->writeunlock.in.count > 0) {
193 memcpy(req->out.data+3, parms->writeunlock.in.data,
194 parms->writeunlock.in.count);
198 case RAW_WRITE_WRITE:
199 SETUP_REQUEST(SMBwrite, 5, 3 + parms->write.in.count);
200 SSVAL(req->out.vwv, VWV(0), parms->write.file.fnum);
201 SSVAL(req->out.vwv, VWV(1), parms->write.in.count);
202 SIVAL(req->out.vwv, VWV(2), parms->write.in.offset);
203 SSVAL(req->out.vwv, VWV(4), parms->write.in.remaining);
204 SCVAL(req->out.data, 0, SMB_DATA_BLOCK);
205 SSVAL(req->out.data, 1, parms->write.in.count);
206 if (parms->write.in.count > 0) {
207 memcpy(req->out.data+3, parms->write.in.data, parms->write.in.count);
211 case RAW_WRITE_WRITECLOSE:
212 SETUP_REQUEST(SMBwriteclose, 6, 1 + parms->writeclose.in.count);
213 SSVAL(req->out.vwv, VWV(0), parms->writeclose.file.fnum);
214 SSVAL(req->out.vwv, VWV(1), parms->writeclose.in.count);
215 SIVAL(req->out.vwv, VWV(2), parms->writeclose.in.offset);
216 raw_push_dos_date3(tree->session->transport,
217 req->out.vwv, VWV(4), parms->writeclose.in.mtime);
218 SCVAL(req->out.data, 0, 0);
219 if (parms->writeclose.in.count > 0) {
220 memcpy(req->out.data+1, parms->writeclose.in.data,
221 parms->writeclose.in.count);
225 case RAW_WRITE_WRITEX:
226 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
229 SETUP_REQUEST(SMBwriteX, bigoffset ? 14 : 12, parms->writex.in.count);
230 SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
231 SSVAL(req->out.vwv, VWV(1), 0);
232 SSVAL(req->out.vwv, VWV(2), parms->writex.file.fnum);
233 SIVAL(req->out.vwv, VWV(3), parms->writex.in.offset);
234 SIVAL(req->out.vwv, VWV(5), 0); /* reserved */
235 SSVAL(req->out.vwv, VWV(7), parms->writex.in.wmode);
236 SSVAL(req->out.vwv, VWV(8), parms->writex.in.remaining);
237 SSVAL(req->out.vwv, VWV(9), parms->writex.in.count>>16);
238 SSVAL(req->out.vwv, VWV(10), parms->writex.in.count);
239 SSVAL(req->out.vwv, VWV(11), PTR_DIFF(req->out.data, req->out.hdr));
241 SIVAL(req->out.vwv,VWV(12),parms->writex.in.offset>>32);
243 if (parms->writex.in.count > 0) {
244 memcpy(req->out.data, parms->writex.in.data, parms->writex.in.count);
248 case RAW_WRITE_SPLWRITE:
249 SETUP_REQUEST(SMBsplwr, 1, parms->splwrite.in.count);
250 SSVAL(req->out.vwv, VWV(0), parms->splwrite.file.fnum);
251 if (parms->splwrite.in.count > 0) {
252 memcpy(req->out.data, parms->splwrite.in.data, parms->splwrite.in.count);
257 if (!smbcli_request_send(req)) {
258 smbcli_request_destroy(req);
266 /****************************************************************************
267 raw write interface (async recv)
268 ****************************************************************************/
269 NTSTATUS smb_raw_write_recv(struct smbcli_request *req, union smb_write *parms)
271 if (!smbcli_request_receive(req) ||
272 smbcli_request_is_error(req)) {
276 switch (parms->generic.level) {
277 case RAW_WRITE_WRITEUNLOCK:
278 SMBCLI_CHECK_WCT(req, 1);
279 parms->writeunlock.out.nwritten = SVAL(req->in.vwv, VWV(0));
281 case RAW_WRITE_WRITE:
282 SMBCLI_CHECK_WCT(req, 1);
283 parms->write.out.nwritten = SVAL(req->in.vwv, VWV(0));
285 case RAW_WRITE_WRITECLOSE:
286 SMBCLI_CHECK_WCT(req, 1);
287 parms->writeclose.out.nwritten = SVAL(req->in.vwv, VWV(0));
289 case RAW_WRITE_WRITEX:
290 SMBCLI_CHECK_WCT(req, 6);
291 parms->writex.out.nwritten = SVAL(req->in.vwv, VWV(2));
292 parms->writex.out.nwritten += (CVAL(req->in.vwv, VWV(4)) << 16);
293 parms->writex.out.remaining = SVAL(req->in.vwv, VWV(3));
295 case RAW_WRITE_SPLWRITE:
300 return smbcli_request_destroy(req);
303 /****************************************************************************
304 raw write interface (sync interface)
305 ****************************************************************************/
306 NTSTATUS smb_raw_write(struct smbcli_tree *tree, union smb_write *parms)
308 struct smbcli_request *req = smb_raw_write_send(tree, parms);
309 return smb_raw_write_recv(req, parms);