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Refactor the immediate transmission feature

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The original way or handling it did not cover
message fragmentation or retransmission.
Now, the messages are always appended
to the flight and sent immediately, using 
the same function as normal flight 
transmission.
Moreover, epoch handling is different for this feature,
with a possibility to perform the usual retransmission
using previous methods. 
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
This commit is contained in:
Andrzej Kurek 2020-12-15 05:46:54 -05:00
parent d886d9f93c
commit 38c7f2d32f
4 changed files with 205 additions and 147 deletions
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28
library/ssl_srv.c
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@ -2743,11 +2743,17 @@ static int ssl_write_hello_verify_request( mbedtls_ssl_context *ssl )
}
#if defined(MBEDTLS_SSL_PROTO_DTLS)
if( MBEDTLS_SSL_TRANSPORT_IS_DTLS( ssl->conf->transport ) &&
( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
if( MBEDTLS_SSL_TRANSPORT_IS_DTLS( ssl->conf->transport ) )
{
MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flight_transmit", ret );
return( ret );
#if defined(MBEDTLS_IMMEDIATE_TRANSMISSION)
mbedtls_ssl_immediate_flight_done( ssl );
#else
if( ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flight_transmit", ret );
return( ret );
}
#endif
}
#endif /* MBEDTLS_SSL_PROTO_DTLS */
@ -3802,11 +3808,17 @@ static int ssl_write_server_hello_done( mbedtls_ssl_context *ssl )
}
#if defined(MBEDTLS_SSL_PROTO_DTLS)
if( MBEDTLS_SSL_TRANSPORT_IS_DTLS( ssl->conf->transport ) &&
( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
if( MBEDTLS_SSL_TRANSPORT_IS_DTLS( ssl->conf->transport ) )
{
MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flight_transmit", ret );
return( ret );
#if defined(MBEDTLS_IMMEDIATE_TRANSMISSION)
mbedtls_ssl_immediate_flight_done( ssl );
#else
if( ( ret = mbedtls_ssl_flight_transmit( ssl ) ) != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_flight_transmit", ret );
return( ret );
}
#endif
}
#endif /* MBEDTLS_SSL_PROTO_DTLS */