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Split the maximum fragment length into two - an input and output MFL

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Since the server might want to have a different maximum fragment length
for the outgoing messages than the negotiated one - introduce a new way of
computing it. This commit also adds additional ssl-opt.sh tests ensuring
that the maximum fragment lengths are set as expected. 
mbedtls_ssl_get_max_frag_len() is now a deprecated function,
being an alias to mbedtls_ssl_get_output_max_frag_len(). The behaviour
of this function is the same as before.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
This commit is contained in:
Andrzej Kurek
2020-04-03 05:25:29 -04:00
parent d4a720f541
commit 90c6e84a9c
8 changed files with 328 additions and 40 deletions
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6
programs/ssl/ssl_client2.c
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@@ -2553,8 +2553,10 @@ int main( int argc, char *argv[] )
mbedtls_printf( " [ Record expansion is unknown (compression) ]\n" );
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
mbedtls_printf( " [ Maximum fragment length is %u ]\n",
(unsigned int) mbedtls_ssl_get_max_frag_len( &ssl ) );
mbedtls_printf( " [ Maximum input fragment length is %u ]\n",
(unsigned int) mbedtls_ssl_get_input_max_frag_len( &ssl ) );
mbedtls_printf( " [ Maximum output fragment length is %u ]\n",
(unsigned int) mbedtls_ssl_get_output_max_frag_len( &ssl ) );
#endif
#if defined(MBEDTLS_SSL_ALPN)