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Retransmit only on last message from prev flight

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Be a good network citizen, try to avoid causing congestion by causing a
retransmission explosion.
This commit is contained in:
Manuel Pégourié-Gonnard 2014-10-09 17:56:57 +02:00 committed by Paul Bakker
parent 8a7cf2543a
commit fc572dd4f6
1 changed files with 4 additions and 2 deletions
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6
library/ssl_tls.c
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@ -2753,8 +2753,10 @@ static int ssl_prepare_handshake_record( ssl_context *ssl )
if( ssl->handshake != NULL &&
recv_msg_seq != ssl->handshake->in_msg_seq )
{
/* No sane server ever retransmits HelloVerifyRequest */
if( recv_msg_seq < ssl->handshake->in_flight_start_seq &&
/* Retransmit only on last message from previous flight, to avoid
* too many retransmissions.
* Besides, No sane server ever retransmits HelloVerifyRequest */
if( recv_msg_seq == ssl->handshake->in_flight_start_seq - 1 &&
ssl->in_msg[0] != SSL_HS_HELLO_VERIFY_REQUEST )
{
SSL_DEBUG_MSG( 2, ( "received message from last flight, "