--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ Core SMB2 server
+
+ Copyright (C) Stefan Metzmacher 2009
+
+ 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 "smbd/globals.h"
+#include "../source4/libcli/smb2/smb2_constants.h"
+
+static NTSTATUS smbd_smb2_write(struct smbd_smb2_request *req,
+ uint32_t in_smbpid,
+ uint64_t in_file_id_volatile,
+ DATA_BLOB in_data,
+ uint64_t in_offset,
+ uint32_t in_flags,
+ uint32_t *out_count);
+
+NTSTATUS smbd_smb2_request_process_write(struct smbd_smb2_request *req)
+{
+ const uint8_t *inhdr;
+ const uint8_t *inbody;
+ int i = req->current_idx;
+ uint8_t *outhdr;
+ DATA_BLOB outbody;
+ DATA_BLOB outdyn;
+ size_t expected_body_size = 0x31;
+ size_t body_size;
+ uint32_t in_smbpid;
+ uint16_t in_data_offset;
+ uint32_t in_data_length;
+ DATA_BLOB in_data_buffer;
+ uint64_t in_offset;
+ uint64_t in_file_id_persistent;
+ uint64_t in_file_id_volatile;
+ uint32_t in_flags;
+ uint32_t out_count;
+ NTSTATUS status;
+
+ inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
+ if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
+
+ body_size = SVAL(inbody, 0x00);
+ if (body_size != expected_body_size) {
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ in_smbpid = IVAL(inhdr, SMB2_HDR_PID);
+
+ in_data_offset = SVAL(inbody, 0x02);
+ in_data_length = IVAL(inbody, 0x04);
+ in_offset = BVAL(inbody, 0x08);
+ in_file_id_persistent = BVAL(inbody, 0x10);
+ in_file_id_volatile = BVAL(inbody, 0x18);
+ in_flags = IVAL(inbody, 0x2C);
+
+ if (in_data_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ if (in_data_length > req->in.vector[i+2].iov_len) {
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ /* check the max write size */
+ if (in_data_length > 0x00010000) {
+ DEBUG(0,("here:%s: 0x%08X: 0x%08X\n",
+ __location__, in_data_length, 0x00010000));
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ in_data_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
+ in_data_buffer.length = in_data_length;
+
+ if (in_file_id_persistent != 0) {
+ return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
+ }
+
+ status = smbd_smb2_write(req,
+ in_smbpid,
+ in_file_id_volatile,
+ in_data_buffer,
+ in_offset,
+ in_flags,
+ &out_count);
+ if (!NT_STATUS_IS_OK(status)) {
+ return smbd_smb2_request_error(req, status);
+ }
+
+ outhdr = (uint8_t *)req->out.vector[i].iov_base;
+
+ outbody = data_blob_talloc(req->out.vector, NULL, 0x10);
+ if (outbody.data == NULL) {
+ return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+ }
+
+ SSVAL(outbody.data, 0x00, 0x10 + 1); /* struct size */
+ SSVAL(outbody.data, 0x02, 0); /* reserved */
+ SIVAL(outbody.data, 0x04, out_count); /* count */
+ SIVAL(outbody.data, 0x08, 0); /* remaining */
+ SSVAL(outbody.data, 0x0C, 0); /* write channel info offset */
+ SSVAL(outbody.data, 0x0E, 0); /* write channel info length */
+
+ outdyn = data_blob_const(NULL, 0);
+
+ return smbd_smb2_request_done(req, outbody, &outdyn);
+}
+
+static NTSTATUS smbd_smb2_write(struct smbd_smb2_request *req,
+ uint32_t in_smbpid,
+ uint64_t in_file_id_volatile,
+ DATA_BLOB in_data,
+ uint64_t in_offset,
+ uint32_t in_flags,
+ uint32_t *out_count)
+{
+ NTSTATUS status;
+ struct smb_request *smbreq;
+ connection_struct *conn = req->tcon->compat_conn;
+ files_struct *fsp;
+ ssize_t nwritten;
+ bool write_through = false;
+ struct lock_struct lock;
+
+ DEBUG(10,("smbd_smb2_write: file_id[0x%016llX]\n",
+ (unsigned long long)in_file_id_volatile));
+
+ smbreq = smbd_smb2_fake_smb_request(req);
+ if (smbreq == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* If it's an IPC, pass off the pipe handler. */
+ if (IS_IPC(conn)) {
+ return NT_STATUS_NOT_IMPLEMENTED;
+ }
+
+ fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
+ if (fsp == NULL) {
+ return NT_STATUS_FILE_CLOSED;
+ }
+ if (conn != fsp->conn) {
+ return NT_STATUS_FILE_CLOSED;
+ }
+ if (req->session->vuid != fsp->vuid) {
+ return NT_STATUS_FILE_CLOSED;
+ }
+
+ if (!CHECK_WRITE(fsp)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ init_strict_lock_struct(fsp,
+ in_smbpid,
+ in_offset,
+ in_data.length,
+ WRITE_LOCK,
+ &lock);
+
+ if (!SMB_VFS_STRICT_LOCK(conn, fsp, &lock)) {
+ return NT_STATUS_FILE_LOCK_CONFLICT;
+ }
+
+ nwritten = write_file(smbreq, fsp,
+ (const char *)in_data.data,
+ in_offset,
+ in_data.length);
+
+ if (((nwritten == 0) && (in_data.length != 0)) || (nwritten < 0)) {
+ DEBUG(5,("smbd_smb2_write: write_file[%s] disk full\n",
+ fsp->fsp_name));
+ SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
+ return NT_STATUS_DISK_FULL;
+ }
+
+ DEBUG(3,("smbd_smb2_write: fnum=[%d/%s] length=%d offset=%d wrote=%d\n",
+ fsp->fnum, fsp->fsp_name, (int)in_data.length,
+ (int)in_offset, (int)nwritten));
+
+ if (in_flags & 0x00000001) {
+ write_through = true;
+ }
+
+ status = sync_file(conn, fsp, write_through);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(5,("smbd_smb2_write: sync_file for %s returned %s\n",
+ fsp->fsp_name, nt_errstr(status)));
+ SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
+ return status;
+ }
+
+ SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
+
+ return NT_STATUS_OK;
+}
git.samba.org / metze / samba / wip.git / commitdiff