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/*
Unix SMB/CIFS implementation.
smb2 lib
Copyright (C) Stefan Metzmacher 2012
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_echo_state {
uint8_t fixed[0x4];
};
static void smb2cli_echo_done(struct tevent_req *subreq);
struct tevent_req *smb2cli_echo_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbXcli_conn *conn,
uint32_t timeout_msec)
{
struct tevent_req *req, *subreq;
struct smb2cli_echo_state *state;
uint8_t *fixed;
req = tevent_req_create(mem_ctx, &state,
struct smb2cli_echo_state);
if (req == NULL) {
return NULL;
}
fixed = state->fixed;
SSVAL(fixed, 0, 4);
SSVAL(fixed, 2, 0);
subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_KEEPALIVE,
0, 0, /* flags */
timeout_msec,
NULL, /* tcon */
NULL, /* session */
state->fixed, sizeof(state->fixed),
NULL, 0, /* dyn* */
0); /* max_dyn_len */
if (tevent_req_nomem(subreq, req)) {
return tevent_req_post(req, ev);
}
tevent_req_set_callback(subreq, smb2cli_echo_done, req);
return req;
}
static void smb2cli_echo_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
struct tevent_req);
NTSTATUS status;
static const struct smb2cli_req_expected_response expected[] = {
{
.status = NT_STATUS_OK,
.body_size = 0x04
}
};
status = smb2cli_req_recv(subreq, NULL, NULL,
expected, ARRAY_SIZE(expected));
TALLOC_FREE(subreq);
if (tevent_req_nterror(req, status)) {
return;
}
tevent_req_done(req);
}
NTSTATUS smb2cli_echo_recv(struct tevent_req *req)
{
return tevent_req_simple_recv_ntstatus(req);
}
NTSTATUS smb2cli_echo(struct smbXcli_conn *conn,
uint32_t timeout_msec)
{
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_echo_send(frame, ev, conn, timeout_msec);
if (req == NULL) {
goto fail;
}
if (!tevent_req_poll_ntstatus(req, ev, &status)) {
goto fail;
}
status = smb2cli_echo_recv(req);
fail:
TALLOC_FREE(frame);
return status;
}
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