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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 "tls/extensions/s2n_server_server_name.h"
#include "stuffer/s2n_stuffer.h"
#include "tls/s2n_connection.h"
static bool s2n_server_name_should_send(struct s2n_connection *conn);
static int s2n_server_name_send(struct s2n_connection *conn, struct s2n_stuffer *out);
static int s2n_server_name_recv(struct s2n_connection *conn, struct s2n_stuffer *extension);
const s2n_extension_type s2n_server_server_name_extension = {
.iana_value = TLS_EXTENSION_SERVER_NAME,
.is_response = true,
.send = s2n_server_name_send,
.recv = s2n_server_name_recv,
.should_send = s2n_server_name_should_send,
.if_missing = s2n_extension_noop_if_missing,
};
static bool s2n_server_name_should_send(struct s2n_connection *conn)
{
return conn && conn->server_name_used && !IS_RESUMPTION_HANDSHAKE(conn);
}
static int s2n_server_name_send(struct s2n_connection *conn, struct s2n_stuffer *out)
{
/* Write nothing. The extension just needs to exist. */
return S2N_SUCCESS;
}
static int s2n_server_name_recv(struct s2n_connection *conn, struct s2n_stuffer *extension)
{
POSIX_ENSURE_REF(conn);
/* Read nothing. The extension just needs to exist. */
conn->server_name_used = 1;
return S2N_SUCCESS;
}
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