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path: root/source3/libsmb/smb2cli_session.c
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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 "client.h"
#include "async_smb.h"
#include "smb2cli.h"
#include "../libcli/smb/smbXcli_base.h"
#include "libsmb/proto.h"
#include "lib/util/tevent_ntstatus.h"
#include "../libcli/auth/spnego.h"
#include "../auth/ntlmssp/ntlmssp.h"

struct smb2cli_logoff_state {
	uint8_t fixed[4];
};

static void smb2cli_logoff_done(struct tevent_req *subreq);

struct tevent_req *smb2cli_logoff_send(TALLOC_CTX *mem_ctx,
				       struct tevent_context *ev,
				       struct smbXcli_conn *conn,
				       uint32_t timeout_msec,
				       struct smbXcli_session *session)
{
	struct tevent_req *req, *subreq;
	struct smb2cli_logoff_state *state;

	req = tevent_req_create(mem_ctx, &state,
				struct smb2cli_logoff_state);
	if (req == NULL) {
		return NULL;
	}
	SSVAL(state->fixed, 0, 4);

	subreq = smb2cli_req_send(state, ev,
				  conn, SMB2_OP_LOGOFF,
				  0, 0, /* flags */
				  timeout_msec,
				  0xFEFF, /* pid */
				  0, /* tid */
				  session,
				  state->fixed, sizeof(state->fixed),
				  NULL, 0);
	if (tevent_req_nomem(subreq, req)) {
		return tevent_req_post(req, ev);
	}
	tevent_req_set_callback(subreq, smb2cli_logoff_done, req);
	return req;
}

static void smb2cli_logoff_done(struct tevent_req *subreq)
{
	struct tevent_req *req =
		tevent_req_callback_data(subreq,
		struct tevent_req);
	struct smb2cli_logoff_state *state =
		tevent_req_data(req,
		struct smb2cli_logoff_state);
	NTSTATUS status;
	struct iovec *iov;
	static const struct smb2cli_req_expected_response expected[] = {
	{
		.status = NT_STATUS_OK,
		.body_size = 0x04
	}
	};

	status = smb2cli_req_recv(subreq, state, &iov,
				  expected, ARRAY_SIZE(expected));
	TALLOC_FREE(subreq);
	if (tevent_req_nterror(req, status)) {
		return;
	}
	tevent_req_done(req);
}

NTSTATUS smb2cli_logoff_recv(struct tevent_req *req)
{
	return tevent_req_simple_recv_ntstatus(req);
}

NTSTATUS smb2cli_logoff(struct smbXcli_conn *conn,
			uint32_t timeout_msec,
			struct smbXcli_session *session)
{
	TALLOC_CTX *frame = talloc_stackframe();
	struct event_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 = event_context_init(frame);
	if (ev == NULL) {
		goto fail;
	}
	req = smb2cli_logoff_send(frame, ev, conn, timeout_msec, session);
	if (req == NULL) {
		goto fail;
	}
	if (!tevent_req_poll_ntstatus(req, ev, &status)) {
		goto fail;
	}
	status = smb2cli_logoff_recv(req);
 fail:
	TALLOC_FREE(frame);
	return status;
}