2 Unix SMB/Netbios implementation.
4 client file read/write routines
5 Copyright (C) Andrew Tridgell 1994-1998
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.
26 /****************************************************************************
27 Issue a single SMBread and don't wait for a reply.
28 ****************************************************************************/
30 static BOOL
cli_issue_read(struct cli_state
*cli
, int fnum
, off_t offset
,
33 memset(cli
->outbuf
,'\0',smb_size
);
34 memset(cli
->inbuf
,'\0',smb_size
);
36 set_message(cli
->outbuf
,10,0,True
);
38 SCVAL(cli
->outbuf
,smb_com
,SMBreadX
);
39 SSVAL(cli
->outbuf
,smb_tid
,cli
->cnum
);
40 cli_setup_packet(cli
);
42 SCVAL(cli
->outbuf
,smb_vwv0
,0xFF);
43 SSVAL(cli
->outbuf
,smb_vwv2
,fnum
);
44 SIVAL(cli
->outbuf
,smb_vwv3
,offset
);
45 SSVAL(cli
->outbuf
,smb_vwv5
,size
);
46 SSVAL(cli
->outbuf
,smb_vwv6
,size
);
47 SSVAL(cli
->outbuf
,smb_mid
,cli
->mid
+ i
);
49 return cli_send_smb(cli
);
52 /****************************************************************************
53 Issue a single SMBreadraw and don't wait for a reply.
54 ****************************************************************************/
56 static BOOL
cli_issue_readraw(struct cli_state
*cli
, int fnum
, off_t offset
,
59 memset(cli
->outbuf
,'\0',smb_size
);
60 memset(cli
->inbuf
,'\0',smb_size
);
62 set_message(cli
->outbuf
,10,0,True
);
64 SCVAL(cli
->outbuf
,smb_com
,SMBreadbraw
);
65 SSVAL(cli
->outbuf
,smb_tid
,cli
->cnum
);
66 cli_setup_packet(cli
);
68 SSVAL(cli
->outbuf
,smb_vwv0
,fnum
);
69 SIVAL(cli
->outbuf
,smb_vwv1
,offset
);
70 SSVAL(cli
->outbuf
,smb_vwv2
,size
);
71 SSVAL(cli
->outbuf
,smb_vwv3
,size
);
72 SSVAL(cli
->outbuf
,smb_mid
,cli
->mid
+ i
);
74 return cli_send_smb(cli
);
77 /****************************************************************************
78 Read size bytes at offset offset using SMBreadX.
79 ****************************************************************************/
81 ssize_t
cli_read(struct cli_state
*cli
, int fnum
, char *buf
, off_t offset
, size_t size
)
92 * Set readsize to the maximum size we can handle in one readX,
93 * rounded down to a multiple of 1024.
96 readsize
= (cli
->max_xmit
- (smb_size
+32)) & ~1023;
98 while (total
< size
) {
99 readsize
= MIN(readsize
, size
-total
);
101 /* Issue a read and receive a reply */
103 if (!cli_issue_read(cli
, fnum
, offset
, readsize
, 0))
106 if (!cli_receive_smb(cli
))
109 /* Check for error. Make sure to check for DOS and NT
112 if (cli_is_error(cli
)) {
113 NTSTATUS status
= NT_STATUS_OK
;
117 if (cli_is_nt_error(cli
))
118 status
= cli_nt_error(cli
);
120 cli_dos_error(cli
, &eclass
, &ecode
);
122 if ((eclass
== ERRDOS
&& ecode
== ERRmoredata
) ||
123 NT_STATUS_V(status
) == NT_STATUS_V(STATUS_MORE_ENTRIES
))
127 size2
= SVAL(cli
->inbuf
, smb_vwv5
);
129 if (size2
> readsize
) {
130 DEBUG(5,("server returned more than we wanted!\n"));
132 } else if (size2
< 0) {
133 DEBUG(5,("read return < 0!\n"));
137 /* Copy data into buffer */
139 p
= smb_base(cli
->inbuf
) + SVAL(cli
->inbuf
,smb_vwv6
);
140 memcpy(buf
+ total
, p
, size2
);
146 * If the server returned less than we asked for we're at EOF.
149 if (size2
< readsize
)
156 /****************************************************************************
157 Tester for the readraw call.
158 ****************************************************************************/
160 ssize_t
cli_readraw(struct cli_state
*cli
, int fnum
, char *buf
, off_t offset
, size_t size
)
171 * Set readsize to the maximum size we can handle in one readraw.
176 while (total
< size
) {
177 readsize
= MIN(readsize
, size
-total
);
179 /* Issue a read and receive a reply */
181 if (!cli_issue_readraw(cli
, fnum
, offset
, readsize
, 0))
184 if (!client_receive_smb(cli
->fd
, cli
->inbuf
, cli
->timeout
))
187 size2
= smb_len(cli
->inbuf
);
189 if (size2
> readsize
) {
190 DEBUG(5,("server returned more than we wanted!\n"));
192 } else if (size2
< 0) {
193 DEBUG(5,("read return < 0!\n"));
197 /* Copy data into buffer */
201 memcpy(buf
+ total
, p
, size2
);
208 * If the server returned less than we asked for we're at EOF.
211 if (size2
< readsize
)
218 /****************************************************************************
219 issue a single SMBwrite and don't wait for a reply
220 ****************************************************************************/
222 static BOOL
cli_issue_write(struct cli_state
*cli
, int fnum
, off_t offset
, uint16 mode
, char *buf
,
227 if (size
> cli
->bufsize
) {
228 cli
->outbuf
= realloc(cli
->outbuf
, size
+ 1024);
229 cli
->inbuf
= realloc(cli
->inbuf
, size
+ 1024);
230 if (cli
->outbuf
== NULL
|| cli
->inbuf
== NULL
)
232 cli
->bufsize
= size
+ 1024;
235 memset(cli
->outbuf
,'\0',smb_size
);
236 memset(cli
->inbuf
,'\0',smb_size
);
239 set_message(cli
->outbuf
,14,0,True
);
241 set_message(cli
->outbuf
,12,0,True
);
243 SCVAL(cli
->outbuf
,smb_com
,SMBwriteX
);
244 SSVAL(cli
->outbuf
,smb_tid
,cli
->cnum
);
245 cli_setup_packet(cli
);
247 SCVAL(cli
->outbuf
,smb_vwv0
,0xFF);
248 SSVAL(cli
->outbuf
,smb_vwv2
,fnum
);
250 SIVAL(cli
->outbuf
,smb_vwv3
,offset
);
251 SIVAL(cli
->outbuf
,smb_vwv5
,(mode
& 0x0008) ? 0xFFFFFFFF : 0);
252 SSVAL(cli
->outbuf
,smb_vwv7
,mode
);
254 SSVAL(cli
->outbuf
,smb_vwv8
,(mode
& 0x0008) ? size
: 0);
255 SSVAL(cli
->outbuf
,smb_vwv9
,((size
>>16)&1));
256 SSVAL(cli
->outbuf
,smb_vwv10
,size
);
257 SSVAL(cli
->outbuf
,smb_vwv11
,
258 smb_buf(cli
->outbuf
) - smb_base(cli
->outbuf
));
260 p
= smb_base(cli
->outbuf
) + SVAL(cli
->outbuf
,smb_vwv11
);
261 memcpy(p
, buf
, size
);
262 cli_setup_bcc(cli
, p
+size
);
264 SSVAL(cli
->outbuf
,smb_mid
,cli
->mid
+ i
);
266 show_msg(cli
->outbuf
);
267 return cli_send_smb(cli
);
270 /****************************************************************************
272 write_mode: 0x0001 disallow write cacheing
273 0x0002 return bytes remaining
274 0x0004 use raw named pipe protocol
275 0x0008 start of message mode named pipe protocol
276 ****************************************************************************/
278 ssize_t
cli_write(struct cli_state
*cli
,
279 int fnum
, uint16 write_mode
,
280 char *buf
, off_t offset
, size_t size
)
285 int mpx
= MAX(cli
->max_mux
-1, 1);
286 int block
= (cli
->max_xmit
- (smb_size
+32)) & ~1023;
287 int blocks
= (size
+ (block
-1)) / block
;
289 while (received
< blocks
) {
291 while ((issued
- received
< mpx
) && (issued
< blocks
)) {
292 int bsent
= issued
* block
;
293 int size1
= MIN(block
, size
- bsent
);
295 if (!cli_issue_write(cli
, fnum
, offset
+ bsent
,
303 if (!cli_receive_smb(cli
))
308 if (cli_is_error(cli
))
311 bwritten
+= SVAL(cli
->inbuf
, smb_vwv2
);
312 bwritten
+= (((int)(SVAL(cli
->inbuf
, smb_vwv4
)))>>16);
315 while (received
< issued
&& cli_receive_smb(cli
))
321 /****************************************************************************
322 write to a file using a SMBwrite and not bypassing 0 byte writes
323 ****************************************************************************/
325 ssize_t
cli_smbwrite(struct cli_state
*cli
,
326 int fnum
, char *buf
, off_t offset
, size_t size1
)
332 size_t size
= MIN(size1
, cli
->max_xmit
- 48);
334 memset(cli
->outbuf
,'\0',smb_size
);
335 memset(cli
->inbuf
,'\0',smb_size
);
337 set_message(cli
->outbuf
,5, 0,True
);
339 SCVAL(cli
->outbuf
,smb_com
,SMBwrite
);
340 SSVAL(cli
->outbuf
,smb_tid
,cli
->cnum
);
341 cli_setup_packet(cli
);
343 SSVAL(cli
->outbuf
,smb_vwv0
,fnum
);
344 SSVAL(cli
->outbuf
,smb_vwv1
,size
);
345 SIVAL(cli
->outbuf
,smb_vwv2
,offset
);
346 SSVAL(cli
->outbuf
,smb_vwv4
,0);
348 p
= smb_buf(cli
->outbuf
);
350 SSVAL(p
, 0, size
); p
+= 2;
351 memcpy(p
, buf
, size
); p
+= size
;
353 cli_setup_bcc(cli
, p
);
355 if (!cli_send_smb(cli
))
358 if (!cli_receive_smb(cli
))
361 if (cli_is_error(cli
))
364 size
= SVAL(cli
->inbuf
,smb_vwv0
);