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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include "api/s2n.h"
#include "tls/s2n_alerts.h"
#include "tls/s2n_connection.h"
#include "tls/s2n_tls.h"
#include "utils/s2n_safety.h"
int s2n_shutdown(struct s2n_connection *conn, s2n_blocked_status * more)
{
POSIX_ENSURE_REF(conn);
POSIX_ENSURE_REF(more);
/* Treat this call as a no-op if already wiped */
if (conn->send == NULL && conn->recv == NULL) {
return 0;
}
uint64_t elapsed;
POSIX_GUARD_RESULT(s2n_timer_elapsed(conn->config, &conn->write_timer, &elapsed));
S2N_ERROR_IF(elapsed < conn->delay, S2N_ERR_SHUTDOWN_PAUSED);
/* Queue our close notify, once. Use warning level so clients don't give up */
POSIX_GUARD(s2n_queue_writer_close_alert_warning(conn));
/* Write it */
POSIX_GUARD(s2n_flush(conn, more));
/* Assume caller isn't interested in pending incoming data */
if (conn->in_status == PLAINTEXT) {
POSIX_GUARD(s2n_stuffer_wipe(&conn->header_in));
POSIX_GUARD(s2n_stuffer_wipe(&conn->in));
conn->in_status = ENCRYPTED;
}
/* Dont expect to receive another close notify alert if we have already received it */
if (!conn->close_notify_received) {
/* Fails with S2N_ERR_SHUTDOWN_RECORD_TYPE or S2N_ERR_ALERT on receipt of anything but a close_notify */
POSIX_GUARD(s2n_recv_close_notify(conn, more));
}
return 0;
}
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