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Add basic first tests for MTU setting

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For now, just check that it causes us to fragment. More tests are coming in
follow-up commits to ensure we respect the exact value set, including when
renegotiating.
This commit is contained in:
Manuel Pégourié-Gonnard
2018-08-12 13:28:53 +02:00
parent 637e234d9f
commit b747c6cf9b
4 changed files with 103 additions and 6 deletions
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library/ssl_tls.c
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@@ -2905,6 +2905,9 @@ int mbedtls_ssl_flight_transmit( mbedtls_ssl_context *ssl )
const size_t frag_len = rem_len > max_hs_fragment_len
? max_hs_fragment_len : rem_len;
if( frag_off == 0 && frag_len != hs_len )
MBEDTLS_SSL_DEBUG_MSG( 2, ( "fragmenting handshake message" ) );
/* Messages are stored with handshake headers as if not fragmented,
* copy beginning of headers then fill fragmentation fields.
* Handshake headers: type(1) len(3) seq(2) f_off(3) f_len(3) */