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-rw-r--r--source/libsmb/clireadwrite.c364
1 files changed, 364 insertions, 0 deletions
diff --git a/source/libsmb/clireadwrite.c b/source/libsmb/clireadwrite.c
new file mode 100644
index 00000000000..f141a208bf9
--- /dev/null
+++ b/source/libsmb/clireadwrite.c
@@ -0,0 +1,364 @@
+/*
+ Unix SMB/Netbios implementation.
+ Version 3.0
+ client file read/write routines
+ Copyright (C) Andrew Tridgell 1994-1998
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#define NO_SYSLOG
+
+#include "includes.h"
+
+/****************************************************************************
+Issue a single SMBread and don't wait for a reply.
+****************************************************************************/
+
+static BOOL cli_issue_read(struct cli_state *cli, int fnum, off_t offset,
+ size_t size, int i)
+{
+ memset(cli->outbuf,'\0',smb_size);
+ memset(cli->inbuf,'\0',smb_size);
+
+ set_message(cli->outbuf,10,0,True);
+
+ CVAL(cli->outbuf,smb_com) = SMBreadX;
+ SSVAL(cli->outbuf,smb_tid,cli->cnum);
+ cli_setup_packet(cli);
+
+ CVAL(cli->outbuf,smb_vwv0) = 0xFF;
+ SSVAL(cli->outbuf,smb_vwv2,fnum);
+ SIVAL(cli->outbuf,smb_vwv3,offset);
+ SSVAL(cli->outbuf,smb_vwv5,size);
+ SSVAL(cli->outbuf,smb_vwv6,size);
+ SSVAL(cli->outbuf,smb_mid,cli->mid + i);
+
+ return cli_send_smb(cli);
+}
+
+/****************************************************************************
+Issue a single SMBreadraw and don't wait for a reply.
+****************************************************************************/
+
+static BOOL cli_issue_readraw(struct cli_state *cli, int fnum, off_t offset,
+ size_t size, int i)
+{
+ memset(cli->outbuf,'\0',smb_size);
+ memset(cli->inbuf,'\0',smb_size);
+
+ set_message(cli->outbuf,10,0,True);
+
+ CVAL(cli->outbuf,smb_com) = SMBreadbraw;
+ SSVAL(cli->outbuf,smb_tid,cli->cnum);
+ cli_setup_packet(cli);
+
+ SSVAL(cli->outbuf,smb_vwv0,fnum);
+ SIVAL(cli->outbuf,smb_vwv1,offset);
+ SSVAL(cli->outbuf,smb_vwv2,size);
+ SSVAL(cli->outbuf,smb_vwv3,size);
+ SSVAL(cli->outbuf,smb_mid,cli->mid + i);
+
+ return cli_send_smb(cli);
+}
+
+/****************************************************************************
+ Read size bytes at offset offset using SMBreadX.
+****************************************************************************/
+
+ssize_t cli_read(struct cli_state *cli, int fnum, char *buf, off_t offset, size_t size)
+{
+ char *p;
+ int size2;
+ int readsize;
+ ssize_t total = 0;
+
+ if (size == 0)
+ return 0;
+
+ /*
+ * Set readsize to the maximum size we can handle in one readX,
+ * rounded down to a multiple of 1024.
+ */
+
+ readsize = (cli->max_xmit - (smb_size+32)) & ~1023;
+
+ while (total < size) {
+ readsize = MIN(readsize, size-total);
+
+ /* Issue a read and receive a reply */
+
+ if (!cli_issue_read(cli, fnum, offset, readsize, 0))
+ return -1;
+
+ if (!cli_receive_smb(cli))
+ return -1;
+
+ /* Check for error. Make sure to check for DOS and NT
+ errors. */
+
+ if (cli_is_error(cli)) {
+ NTSTATUS status = NT_STATUS_OK;
+ uint8 eclass = 0;
+ uint32 ecode = 0;
+
+ if (cli_is_nt_error(cli))
+ status = cli_nt_error(cli);
+ else
+ cli_dos_error(cli, &eclass, &ecode);
+
+ if ((eclass == ERRDOS && ecode == ERRmoredata) ||
+ NT_STATUS_V(status) == NT_STATUS_V(STATUS_MORE_ENTRIES))
+ return -1;
+ }
+
+ size2 = SVAL(cli->inbuf, smb_vwv5);
+
+ if (size2 > readsize) {
+ DEBUG(5,("server returned more than we wanted!\n"));
+ return -1;
+ } else if (size2 < 0) {
+ DEBUG(5,("read return < 0!\n"));
+ return -1;
+ }
+
+ /* Copy data into buffer */
+
+ p = smb_base(cli->inbuf) + SVAL(cli->inbuf,smb_vwv6);
+ memcpy(buf + total, p, size2);
+
+ total += size2;
+ offset += size2;
+
+ /*
+ * If the server returned less than we asked for we're at EOF.
+ */
+
+ if (size2 < readsize)
+ break;
+ }
+
+ return total;
+}
+
+/****************************************************************************
+ Tester for the readraw call.
+****************************************************************************/
+
+ssize_t cli_readraw(struct cli_state *cli, int fnum, char *buf, off_t offset, size_t size)
+{
+ char *p;
+ int size2;
+ size_t readsize;
+ ssize_t total = 0;
+
+ if (size == 0)
+ return 0;
+
+ /*
+ * Set readsize to the maximum size we can handle in one readraw.
+ */
+
+ readsize = 0xFFFF;
+
+ while (total < size) {
+ readsize = MIN(readsize, size-total);
+
+ /* Issue a read and receive a reply */
+
+ if (!cli_issue_readraw(cli, fnum, offset, readsize, 0))
+ return -1;
+
+ if (!client_receive_smb(cli->fd, cli->inbuf, cli->timeout))
+ return -1;
+
+ size2 = smb_len(cli->inbuf);
+
+ if (size2 > readsize) {
+ DEBUG(5,("server returned more than we wanted!\n"));
+ return -1;
+ } else if (size2 < 0) {
+ DEBUG(5,("read return < 0!\n"));
+ return -1;
+ }
+
+ /* Copy data into buffer */
+
+ if (size2) {
+ p = cli->inbuf + 4;
+ memcpy(buf + total, p, size2);
+ }
+
+ total += size2;
+ offset += size2;
+
+ /*
+ * If the server returned less than we asked for we're at EOF.
+ */
+
+ if (size2 < readsize)
+ break;
+ }
+
+ return total;
+}
+
+/****************************************************************************
+issue a single SMBwrite and don't wait for a reply
+****************************************************************************/
+
+static BOOL cli_issue_write(struct cli_state *cli, int fnum, off_t offset, uint16 mode, char *buf,
+ size_t size, int i)
+{
+ char *p;
+
+ memset(cli->outbuf,'\0',smb_size);
+ memset(cli->inbuf,'\0',smb_size);
+
+ if (size > 0xFFFF)
+ set_message(cli->outbuf,14,0,True);
+ else
+ set_message(cli->outbuf,12,0,True);
+
+ CVAL(cli->outbuf,smb_com) = SMBwriteX;
+ SSVAL(cli->outbuf,smb_tid,cli->cnum);
+ cli_setup_packet(cli);
+
+ CVAL(cli->outbuf,smb_vwv0) = 0xFF;
+ SSVAL(cli->outbuf,smb_vwv2,fnum);
+
+ SIVAL(cli->outbuf,smb_vwv3,offset);
+ SIVAL(cli->outbuf,smb_vwv5,(mode & 0x0008) ? 0xFFFFFFFF : 0);
+ SSVAL(cli->outbuf,smb_vwv7,mode);
+
+ SSVAL(cli->outbuf,smb_vwv8,(mode & 0x0008) ? size : 0);
+ SSVAL(cli->outbuf,smb_vwv9,((size>>16)&1));
+ SSVAL(cli->outbuf,smb_vwv10,size);
+ SSVAL(cli->outbuf,smb_vwv11,
+ smb_buf(cli->outbuf) - smb_base(cli->outbuf));
+
+ p = smb_base(cli->outbuf) + SVAL(cli->outbuf,smb_vwv11);
+ memcpy(p, buf, size);
+ cli_setup_bcc(cli, p+size);
+
+ SSVAL(cli->outbuf,smb_mid,cli->mid + i);
+
+ show_msg(cli->outbuf);
+ return cli_send_smb(cli);
+}
+
+/****************************************************************************
+ write to a file
+ write_mode: 0x0001 disallow write cacheing
+ 0x0002 return bytes remaining
+ 0x0004 use raw named pipe protocol
+ 0x0008 start of message mode named pipe protocol
+****************************************************************************/
+
+ssize_t cli_write(struct cli_state *cli,
+ int fnum, uint16 write_mode,
+ char *buf, off_t offset, size_t size)
+{
+ int bwritten = 0;
+ int issued = 0;
+ int received = 0;
+ int mpx = MAX(cli->max_mux-1, 1);
+ int block = (cli->max_xmit - (smb_size+32)) & ~1023;
+ int blocks = (size + (block-1)) / block;
+
+ while (received < blocks) {
+
+ while ((issued - received < mpx) && (issued < blocks)) {
+ int bsent = issued * block;
+ int size1 = MIN(block, size - bsent);
+
+ if (!cli_issue_write(cli, fnum, offset + bsent,
+ write_mode,
+ buf + bsent,
+ size1, issued))
+ return -1;
+ issued++;
+ }
+
+ if (!cli_receive_smb(cli))
+ return bwritten;
+
+ received++;
+
+ if (cli_is_error(cli))
+ break;
+
+ bwritten += SVAL(cli->inbuf, smb_vwv2);
+ }
+
+ while (received < issued && cli_receive_smb(cli))
+ received++;
+
+ return bwritten;
+}
+
+/****************************************************************************
+ write to a file using a SMBwrite and not bypassing 0 byte writes
+****************************************************************************/
+
+ssize_t cli_smbwrite(struct cli_state *cli,
+ int fnum, char *buf, off_t offset, size_t size1)
+{
+ char *p;
+ ssize_t total = 0;
+
+ do {
+ size_t size = MIN(size1, cli->max_xmit - 48);
+
+ memset(cli->outbuf,'\0',smb_size);
+ memset(cli->inbuf,'\0',smb_size);
+
+ set_message(cli->outbuf,5, 0,True);
+
+ CVAL(cli->outbuf,smb_com) = SMBwrite;
+ SSVAL(cli->outbuf,smb_tid,cli->cnum);
+ cli_setup_packet(cli);
+
+ SSVAL(cli->outbuf,smb_vwv0,fnum);
+ SSVAL(cli->outbuf,smb_vwv1,size);
+ SIVAL(cli->outbuf,smb_vwv2,offset);
+ SSVAL(cli->outbuf,smb_vwv4,0);
+
+ p = smb_buf(cli->outbuf);
+ *p++ = 1;
+ SSVAL(p, 0, size); p += 2;
+ memcpy(p, buf, size); p += size;
+
+ cli_setup_bcc(cli, p);
+
+ if (!cli_send_smb(cli))
+ return -1;
+
+ if (!cli_receive_smb(cli))
+ return -1;
+
+ if (cli_is_error(cli))
+ return -1;
+
+ size = SVAL(cli->inbuf,smb_vwv0);
+ if (size == 0)
+ break;
+
+ size1 -= size;
+ total += size;
+ } while (size1);
+
+ return total;
+}
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