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-rw-r--r--source4/libcli/clireadwrite.c167
1 files changed, 167 insertions, 0 deletions
diff --git a/source4/libcli/clireadwrite.c b/source4/libcli/clireadwrite.c
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+++ b/source4/libcli/clireadwrite.c
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+/*
+ Unix SMB/CIFS implementation.
+ client file read/write routines
+ Copyright (C) Andrew Tridgell 1994-1998
+ Copyright (C) James Myers 2003
+
+ 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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "libcli/raw/libcliraw.h"
+#include "libcli/raw/raw_proto.h"
+#include "libcli/libcli.h"
+
+/****************************************************************************
+ Read size bytes at offset offset using SMBreadX.
+****************************************************************************/
+ssize_t smbcli_read(struct smbcli_tree *tree, int fnum, void *_buf, off_t offset,
+ size_t size)
+{
+ uint8_t *buf = (uint8_t *)_buf;
+ union smb_read parms;
+ int readsize;
+ ssize_t total = 0;
+
+ if (size == 0) {
+ return 0;
+ }
+
+ parms.readx.level = RAW_READ_READX;
+ parms.readx.in.file.fnum = fnum;
+
+ /*
+ * Set readsize to the maximum size we can handle in one readX,
+ * rounded down to a multiple of 1024.
+ */
+ readsize = (tree->session->transport->negotiate.max_xmit - (MIN_SMB_SIZE+32));
+ if (readsize > 0xFFFF) readsize = 0xFFFF;
+
+ while (total < size) {
+ NTSTATUS status;
+
+ readsize = MIN(readsize, size-total);
+
+ parms.readx.in.offset = offset;
+ parms.readx.in.mincnt = readsize;
+ parms.readx.in.maxcnt = readsize;
+ parms.readx.in.remaining = size - total;
+ parms.readx.in.read_for_execute = false;
+ parms.readx.out.data = buf + total;
+
+ status = smb_raw_read(tree, &parms);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ return -1;
+ }
+
+ total += parms.readx.out.nread;
+ offset += parms.readx.out.nread;
+
+ /* If the server returned less than we asked for we're at EOF */
+ if (parms.readx.out.nread < readsize)
+ break;
+ }
+
+ return total;
+}
+
+
+/****************************************************************************
+ write to a file
+ write_mode: 0x0001 disallow write caching
+ 0x0002 return bytes remaining
+ 0x0004 use raw named pipe protocol
+ 0x0008 start of message mode named pipe protocol
+****************************************************************************/
+ssize_t smbcli_write(struct smbcli_tree *tree,
+ int fnum, uint16_t write_mode,
+ const void *_buf, off_t offset, size_t size)
+{
+ const uint8_t *buf = (const uint8_t *)_buf;
+ union smb_write parms;
+ int block = (tree->session->transport->negotiate.max_xmit - (MIN_SMB_SIZE+32));
+ ssize_t total = 0;
+
+ if (size == 0) {
+ return 0;
+ }
+
+ if (block > 0xFFFF) block = 0xFFFF;
+
+
+ parms.writex.level = RAW_WRITE_WRITEX;
+ parms.writex.in.file.fnum = fnum;
+ parms.writex.in.wmode = write_mode;
+ parms.writex.in.remaining = 0;
+
+ do {
+ NTSTATUS status;
+
+ block = MIN(block, size - total);
+
+ parms.writex.in.offset = offset;
+ parms.writex.in.count = block;
+ parms.writex.in.data = buf;
+
+ status = smb_raw_write(tree, &parms);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ return -1;
+ }
+
+ offset += parms.writex.out.nwritten;
+ total += parms.writex.out.nwritten;
+ buf += parms.writex.out.nwritten;
+ } while (total < size);
+
+ return total;
+}
+
+/****************************************************************************
+ write to a file using a SMBwrite and not bypassing 0 byte writes
+****************************************************************************/
+ssize_t smbcli_smbwrite(struct smbcli_tree *tree,
+ int fnum, const void *_buf, off_t offset, size_t size1)
+{
+ const uint8_t *buf = (const uint8_t *)_buf;
+ union smb_write parms;
+ ssize_t total = 0;
+
+ parms.write.level = RAW_WRITE_WRITE;
+ parms.write.in.remaining = 0;
+
+ do {
+ size_t size = MIN(size1, tree->session->transport->negotiate.max_xmit - 48);
+ if (size > 0xFFFF) size = 0xFFFF;
+
+ parms.write.in.file.fnum = fnum;
+ parms.write.in.offset = offset;
+ parms.write.in.count = size;
+ parms.write.in.data = buf + total;
+
+ if (NT_STATUS_IS_ERR(smb_raw_write(tree, &parms)))
+ return -1;
+
+ size = parms.write.out.nwritten;
+ if (size == 0)
+ break;
+
+ size1 -= size;
+ total += size;
+ offset += size;
+ } while (size1);
+
+ return total;
+}