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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.
*/
#pragma once
/*
* Linux doesn't expose kTLS headers in its uapi. Its possible to get these headers
* via glibc but support can vary depending on the version of glibc on the host.
* Instead we define linux specific values inline.
*
* - https://elixir.bootlin.com/linux/v6.3.8/A/ident/TCP_ULP
* - https://elixir.bootlin.com/linux/v6.3.8/A/ident/SOL_TCP
*/
#if defined(S2N_KTLS_SUPPORTED)
#include <linux/tls.h>
/* socket definitions */
#define S2N_TCP_ULP 31 /* Attach a ULP to a TCP connection. */
#define S2N_SOL_TCP 6 /* TCP level */
#define S2N_SOL_TLS 282
/* We typically only define values not available in the linux uapi. However,
* only TLS_TX is defined in the first version of kTLS. Since calling setsockopt
* with TLS_RX fails and is non destructive, define both TX and RX to keep the
* definitions co-located and avoid extra ifdefs.
* https://github.com/torvalds/linux/blob/3c4d7559159bfe1e3b94df3a657b2cda3a34e218/include/uapi/linux/tls.h#L43
*/
#define S2N_TLS_TX 1
#define S2N_TLS_RX 2
#define S2N_TLS_SET_RECORD_TYPE TLS_SET_RECORD_TYPE
#define S2N_TLS_GET_RECORD_TYPE TLS_GET_RECORD_TYPE
#else
/* For unsupported platforms 0-init (array of size 1) all values. */
/* socket definitions */
#define S2N_TCP_ULP 0
#define S2N_SOL_TCP 0
#define S2N_SOL_TLS 0
#define S2N_TLS_TX 0
#define S2N_TLS_RX 0
#define S2N_TLS_SET_RECORD_TYPE 0
#define S2N_TLS_GET_RECORD_TYPE 0
#endif
/* Common */
#define S2N_TLS_ULP_NAME "tls"
#define S2N_TLS_ULP_NAME_SIZE sizeof(S2N_TLS_ULP_NAME)
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