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/*
Unix SMB/CIFS implementation.
NT transaction handling
Copyright (C) Andrew Tridgell 2003
Copyright (C) James J Myers 2003 <myersjj@samba.org>
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.
*/
/*
This file handles the parsing of transact2 requests
*/
#include "includes.h"
#define CHECK_MIN_BLOB_SIZE(blob, size) do { \
if ((blob)->length < (size)) { \
return NT_STATUS_INFO_LENGTH_MISMATCH; \
}} while (0)
/* setup a nttrans reply, given the data and params sizes */
static void nttrans_setup_reply(struct smbsrv_request *req,
struct smb_nttrans *trans,
uint16_t param_size, uint16_t data_size,
uint16_t setup_count)
{
trans->out.setup_count = setup_count;
if (setup_count != 0) {
trans->out.setup = talloc_zero(req, sizeof(uint16_t) * setup_count);
}
trans->out.params = data_blob_talloc(req, NULL, param_size);
trans->out.data = data_blob_talloc(req, NULL, data_size);
}
/* parse NTTRANS_CREATE request
*/
static NTSTATUS nttrans_create(struct smbsrv_request *req,
struct smb_nttrans *trans)
{
return NT_STATUS_FOOBAR;
}
/* parse NTTRANS_RENAME request
*/
static NTSTATUS nttrans_rename(struct smbsrv_request *req,
struct smb_nttrans *trans)
{
return NT_STATUS_FOOBAR;
}
/* parse NTTRANS_IOCTL request
*/
static NTSTATUS nttrans_ioctl(struct smbsrv_request *req,
struct smb_nttrans *trans)
{
union smb_ioctl nt;
uint32_t function;
uint16_t fnum;
uint8_t filter;
BOOL fsctl;
DATA_BLOB *blob;
/* should have at least 4 setup words */
if (trans->in.setup_count != 4) {
return NT_STATUS_INVALID_PARAMETER;
}
function = IVAL(trans->in.setup, 0);
fnum = SVAL(trans->in.setup, 4);
fsctl = CVAL(trans->in.setup, 6);
filter = CVAL(trans->in.setup, 7);
blob = &trans->in.data;
nt.ntioctl.level = RAW_IOCTL_NTIOCTL;
nt.ntioctl.in.fnum = fnum;
nt.ntioctl.in.function = function;
nt.ntioctl.in.fsctl = fsctl;
nt.ntioctl.in.filter = filter;
nttrans_setup_reply(req, trans, 0, 0, 1);
trans->out.setup[0] = 0;
return req->tcon->ntvfs_ops->ioctl(req, &nt);
}
/*
backend for nttrans requests
*/
static NTSTATUS nttrans_backend(struct smbsrv_request *req,
struct smb_nttrans *trans)
{
DEBUG(9,("nttrans_backend: setup_count=%d function=%d\n",
trans->in.setup_count, trans->in.function));
/* must have at least one setup word */
if (trans->in.setup_count < 1) {
return NT_STATUS_FOOBAR;
}
/* the nttrans command is in function */
switch (trans->in.function) {
case NT_TRANSACT_CREATE:
return nttrans_create(req, trans);
case NT_TRANSACT_IOCTL:
return nttrans_ioctl(req, trans);
case NT_TRANSACT_RENAME:
return nttrans_rename(req, trans);
}
/* an unknown nttrans command */
return NT_STATUS_FOOBAR;
}
/****************************************************************************
Reply to an SMBnttrans request
****************************************************************************/
void reply_nttrans(struct smbsrv_request *req)
{
struct smb_nttrans trans;
int i;
uint16_t param_ofs, data_ofs;
uint16_t param_count, data_count;
uint16_t params_left, data_left;
uint16_t param_total, data_total;
char *params, *data;
NTSTATUS status;
/* parse request */
if (req->in.wct < 19) {
req_reply_error(req, NT_STATUS_FOOBAR);
return;
}
trans.in.max_setup = CVAL(req->in.vwv, 0);
param_total = IVAL(req->in.vwv, 3);
data_total = IVAL(req->in.vwv, 7);
trans.in.max_param = IVAL(req->in.vwv, 11);
trans.in.max_data = IVAL(req->in.vwv, 15);
param_count = IVAL(req->in.vwv, 19);
param_ofs = IVAL(req->in.vwv, 23);
data_count = IVAL(req->in.vwv, 27);
data_ofs = IVAL(req->in.vwv, 31);
trans.in.setup_count = CVAL(req->in.vwv, 35);
trans.in.function = SVAL(req->in.vwv, 36);
if (req->in.wct != 19 + trans.in.setup_count) {
req_reply_dos_error(req, ERRSRV, ERRerror);
return;
}
/* parse out the setup words */
trans.in.setup = talloc(req, trans.in.setup_count * sizeof(uint16_t));
if (!trans.in.setup) {
req_reply_error(req, NT_STATUS_NO_MEMORY);
return;
}
for (i=0;i<trans.in.setup_count;i++) {
trans.in.setup[i] = SVAL(req->in.vwv, VWV(19+i));
}
if (!req_pull_blob(req, req->in.hdr + param_ofs, param_count, &trans.in.params) ||
!req_pull_blob(req, req->in.hdr + data_ofs, data_count, &trans.in.data)) {
req_reply_error(req, NT_STATUS_FOOBAR);
return;
}
/* is it a partial request? if so, then send a 'send more' message */
if (param_total > param_count ||
data_total > data_count) {
DEBUG(0,("REWRITE: not handling partial nttrans requests!\n"));
return;
}
/* its a full request, give it to the backend */
status = nttrans_backend(req, &trans);
if (!NT_STATUS_IS_OK(status)) {
req_reply_error(req, status);
return;
}
params_left = trans.out.params.length;
data_left = trans.out.data.length;
params = trans.out.params.data;
data = trans.out.data.data;
/* we need to divide up the reply into chunks that fit into
the negotiated buffer size */
do {
uint16_t this_data, this_param, max_bytes;
uint_t align1 = 1, align2 = (params_left ? 2 : 0);
req_setup_reply(req, 18 + trans.out.setup_count, 0);
max_bytes = req_max_data(req) - (align1 + align2);
this_param = params_left;
if (this_param > max_bytes) {
this_param = max_bytes;
}
max_bytes -= this_param;
this_data = data_left;
if (this_data > max_bytes) {
this_data = max_bytes;
}
req_grow_data(req, this_param + this_data + (align1 + align2));
SIVAL(req->out.vwv, 3, trans.out.params.length);
SIVAL(req->out.vwv, 7, trans.out.data.length);
SIVAL(req->out.vwv, 11, this_param);
SIVAL(req->out.vwv, 15, align1 + PTR_DIFF(req->out.data, req->out.hdr));
SIVAL(req->out.vwv, 19, PTR_DIFF(params, trans.out.params.data));
SIVAL(req->out.vwv, 23, this_data);
SIVAL(req->out.vwv, 27, align1 + align2 +
PTR_DIFF(req->out.data + this_param, req->out.hdr));
SIVAL(req->out.vwv, 31, PTR_DIFF(data, trans.out.data.data));
SCVAL(req->out.vwv, 35, trans.out.setup_count);
for (i=0;i<trans.out.setup_count;i++) {
SSVAL(req->out.vwv, VWV(18+i)+1, trans.out.setup[i]);
}
memset(req->out.data, 0, align1);
if (this_param != 0) {
memcpy(req->out.data + align1, params, this_param);
}
memset(req->out.data+this_param+align1, 0, align2);
if (this_data != 0) {
memcpy(req->out.data+this_param+align1+align2, data, this_data);
}
params_left -= this_param;
data_left -= this_data;
params += this_param;
data += this_data;
/* don't destroy unless this is the last segment */
if (params_left != 0 || data_left != 0) {
talloc_increase_ref_count(req);
}
req_send_reply(req);
} while (params_left != 0 || data_left != 0);
}
/****************************************************************************
Reply to an SMBnttranss request
****************************************************************************/
void reply_nttranss(struct smbsrv_request *req)
{
req_reply_error(req, NT_STATUS_FOOBAR);
}
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