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Configure maximum fragment length extension. (#350)

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This commit is contained in:
Carl Lundin
2020-10-18 16:57:47 -07:00
committed by GitHub
parent 60ac51d7f1
commit 2eed409577
2 changed files with 42 additions and 0 deletions
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21
FreeRTOS-Plus/Source/Application-Protocols/platform/freertos/transport/src/tls_freertos.c
View File

@ -402,6 +402,27 @@ static void setOptionalConfigurations( SSLContext_t * pSslContext,
mbedtlsLowLevelCodeOrDefault( mbedtlsError ) ) );
}
}
/* Set Maximum Fragment Length if enabled. */
#ifdef MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
if( 0 == mbedtlsError )
{
/* Enable the max fragment extension. 4096 bytes is currently the largest fragment size permitted.
* See RFC 8449 https://tools.ietf.org/html/rfc8449 for more information.
*
* Smaller values can be found in "mbedtls/include/ssl.h".
*/
mbedtlsError = mbedtls_ssl_conf_max_frag_len( &( pSslContext->config ), MBEDTLS_SSL_MAX_FRAG_LEN_4096 );
if( mbedtlsError != 0 )
{
LogError( ( "Failed to maximum fragment length extension: mbedTLSError= %s : %s.",
mbedtlsHighLevelCodeOrDefault( mbedtlsError ),
mbedtlsLowLevelCodeOrDefault( mbedtlsError ) ) );
}
}
#endif
}
/*-----------------------------------------------------------*/

21
FreeRTOS-Plus/Source/Application-Protocols/platform/freertos/transport/src/tls_freertos_pkcs11.c
View File

@ -393,6 +393,27 @@ static TlsTransportStatus_t tlsSetup( NetworkContext_t * pNetworkContext,
}
}
/* Set Maximum Fragment Length if enabled. */
#ifdef MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
if( returnStatus == TLS_TRANSPORT_SUCCESS )
{
/* Enable the max fragment extension. 4096 bytes is currently the largest fragment size permitted.
* See RFC 8449 https://tools.ietf.org/html/rfc8449 for more information.
*
* Smaller values can be found in "mbedtls/include/ssl.h".
*/
mbedtlsError = mbedtls_ssl_conf_max_frag_len( &( pNetworkContext->sslContext.config ), MBEDTLS_SSL_MAX_FRAG_LEN_4096 );
if( mbedtlsError != 0 )
{
LogError( ( "Failed to maximum fragment length extension: mbedTLSError= %s : %s.",
mbedtlsHighLevelCodeOrDefault( mbedtlsError ),
mbedtlsLowLevelCodeOrDefault( mbedtlsError ) ) );
returnStatus = TLS_TRANSPORT_INTERNAL_ERROR;
}
}
#endif
if( returnStatus == TLS_TRANSPORT_SUCCESS )
{
/* Perform the TLS handshake. */