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 CVAL(cli->outbuf,smb_com) = SMBreadX;
39 SSVAL(cli->outbuf,smb_tid,cli->cnum);
40 cli_setup_packet(cli);
42 CVAL(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 CVAL(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 memset(cli->outbuf,'\0',smb_size);
228 memset(cli->inbuf,'\0',smb_size);
231 set_message(cli->outbuf,14,0,True);
233 set_message(cli->outbuf,12,0,True);
235 CVAL(cli->outbuf,smb_com) = SMBwriteX;
236 SSVAL(cli->outbuf,smb_tid,cli->cnum);
237 cli_setup_packet(cli);
239 CVAL(cli->outbuf,smb_vwv0) = 0xFF;
240 SSVAL(cli->outbuf,smb_vwv2,fnum);
242 SIVAL(cli->outbuf,smb_vwv3,offset);
243 SIVAL(cli->outbuf,smb_vwv5,(mode & 0x0008) ? 0xFFFFFFFF : 0);
244 SSVAL(cli->outbuf,smb_vwv7,mode);
246 SSVAL(cli->outbuf,smb_vwv8,(mode & 0x0008) ? size : 0);
247 SSVAL(cli->outbuf,smb_vwv9,((size>>16)&1));
248 SSVAL(cli->outbuf,smb_vwv10,size);
249 SSVAL(cli->outbuf,smb_vwv11,
250 smb_buf(cli->outbuf) - smb_base(cli->outbuf));
252 p = smb_base(cli->outbuf) + SVAL(cli->outbuf,smb_vwv11);
253 memcpy(p, buf, size);
254 cli_setup_bcc(cli, p+size);
256 SSVAL(cli->outbuf,smb_mid,cli->mid + i);
258 show_msg(cli->outbuf);
259 return cli_send_smb(cli);
262 /****************************************************************************
264 write_mode: 0x0001 disallow write cacheing
265 0x0002 return bytes remaining
266 0x0004 use raw named pipe protocol
267 0x0008 start of message mode named pipe protocol
268 ****************************************************************************/
270 ssize_t cli_write(struct cli_state *cli,
271 int fnum, uint16 write_mode,
272 char *buf, off_t offset, size_t size)
277 int mpx = MAX(cli->max_mux-1, 1);
278 int block = (cli->max_xmit - (smb_size+32)) & ~1023;
279 int blocks = (size + (block-1)) / block;
281 while (received < blocks) {
283 while ((issued - received < mpx) && (issued < blocks)) {
284 int bsent = issued * block;
285 int size1 = MIN(block, size - bsent);
287 if (!cli_issue_write(cli, fnum, offset + bsent,
295 if (!cli_receive_smb(cli))
300 if (cli_is_error(cli))
303 bwritten += SVAL(cli->inbuf, smb_vwv2);
306 while (received < issued && cli_receive_smb(cli))
312 /****************************************************************************
313 write to a file using a SMBwrite and not bypassing 0 byte writes
314 ****************************************************************************/
316 ssize_t cli_smbwrite(struct cli_state *cli,
317 int fnum, char *buf, off_t offset, size_t size1)
323 size_t size = MIN(size1, cli->max_xmit - 48);
325 memset(cli->outbuf,'\0',smb_size);
326 memset(cli->inbuf,'\0',smb_size);
328 set_message(cli->outbuf,5, 0,True);
330 CVAL(cli->outbuf,smb_com) = SMBwrite;
331 SSVAL(cli->outbuf,smb_tid,cli->cnum);
332 cli_setup_packet(cli);
334 SSVAL(cli->outbuf,smb_vwv0,fnum);
335 SSVAL(cli->outbuf,smb_vwv1,size);
336 SIVAL(cli->outbuf,smb_vwv2,offset);
337 SSVAL(cli->outbuf,smb_vwv4,0);
339 p = smb_buf(cli->outbuf);
341 SSVAL(p, 0, size); p += 2;
342 memcpy(p, buf, size); p += size;
344 cli_setup_bcc(cli, p);
346 if (!cli_send_smb(cli))
349 if (!cli_receive_smb(cli))
352 if (cli_is_error(cli))
355 size = SVAL(cli->inbuf,smb_vwv0);