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/*
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;
}
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