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/*
Unix SMB/CIFS implementation.
smb2 lib
Copyright (C) Volker Lendecke 2011
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 "system/network.h"
#include "lib/util/tevent_ntstatus.h"
#include "smb_common.h"
#include "smbXcli_base.h"
struct smb2cli_write_state {
uint8_t fixed[48];
uint8_t dyn_pad[1];
uint32_t written;
};
static void smb2cli_write_done(struct tevent_req *subreq);
struct tevent_req *smb2cli_write_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbXcli_conn *conn,
uint32_t timeout_msec,
struct smbXcli_session *session,
struct smbXcli_tcon *tcon,
uint32_t length,
uint64_t offset,
uint64_t fid_persistent,
uint64_t fid_volatile,
uint32_t remaining_bytes,
uint32_t flags,
const uint8_t *data)
{
struct tevent_req *req, *subreq;
struct smb2cli_write_state *state;
uint8_t *fixed;
const uint8_t *dyn;
size_t dyn_len;
req = tevent_req_create(mem_ctx, &state,
struct smb2cli_write_state);
if (req == NULL) {
return NULL;
}
fixed = state->fixed;
SSVAL(fixed, 0, 49);
SSVAL(fixed, 2, SMB2_HDR_BODY + 48);
SIVAL(fixed, 4, length);
SBVAL(fixed, 8, offset);
SBVAL(fixed, 16, fid_persistent);
SBVAL(fixed, 24, fid_volatile);
SIVAL(fixed, 36, remaining_bytes);
SIVAL(fixed, 44, flags);
if (length > 0) {
dyn = data;
dyn_len = length;
} else {
dyn = state->dyn_pad;;
dyn_len = sizeof(state->dyn_pad);
}
subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_WRITE,
0, 0, /* flags */
timeout_msec,
tcon,
session,
state->fixed, sizeof(state->fixed),
dyn, dyn_len,
0); /* max_dyn_len */
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, smb2cli_write_done, req);
return req;
}
static void smb2cli_write_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
struct smb2cli_write_state *state =
tevent_req_data(req,
struct smb2cli_write_state);
NTSTATUS status;
struct iovec *iov;
static const struct smb2cli_req_expected_response expected[] = {
{
.status = NT_STATUS_OK,
.body_size = 0x11
}
};
status = smb2cli_req_recv(subreq, state, &iov,
expected, ARRAY_SIZE(expected));
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
state->written = IVAL(iov[1].iov_base, 4);
tevent_req_done(req);
}
NTSTATUS smb2cli_write_recv(struct tevent_req *req, uint32_t *written)
{
struct smb2cli_write_state *state =
tevent_req_data(req,
struct smb2cli_write_state);
NTSTATUS status;
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
if (written) {
*written = state->written;
}
tevent_req_received(req);
return NT_STATUS_OK;
}
NTSTATUS smb2cli_write(struct smbXcli_conn *conn,
uint32_t timeout_msec,
struct smbXcli_session *session,
struct smbXcli_tcon *tcon,
uint32_t length,
uint64_t offset,
uint64_t fid_persistent,
uint64_t fid_volatile,
uint32_t remaining_bytes,
uint32_t flags,
const uint8_t *data,
uint32_t *written)
{
TALLOC_CTX *frame = talloc_stackframe();
struct tevent_context *ev;
struct tevent_req *req;
NTSTATUS status = NT_STATUS_NO_MEMORY;
if (smbXcli_conn_has_async_calls(conn)) {
/*
* Can't use sync call while an async call is in flight
*/
status = NT_STATUS_INVALID_PARAMETER;
goto fail;
}
ev = samba_tevent_context_init(frame);
if (ev == NULL) {
goto fail;
}
req = smb2cli_write_send(frame, ev, conn, timeout_msec,
session, tcon,
length, offset,
fid_persistent, fid_volatile,
remaining_bytes, flags, data);
if (req == NULL) {
goto fail;
}
if (!tevent_req_poll_ntstatus(req, ev, &status)) {
goto fail;
}
status = smb2cli_write_recv(req, written);
fail:
TALLOC_FREE(frame);
return status;
}
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