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Reduced SCTP min RTO to 200ms

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This commit is contained in:
Paul-Louis Ageneau
2021-05-20 14:29:15 +02:00
parent 05a37c8306
commit ddbd963e7e
1 changed files with 9 additions and 5 deletions
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14
src/impl/sctptransport.cpp
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@ -118,17 +118,21 @@ void SctpTransport::SetSettings(const SctpSettings &s) {
usrsctp_sysctl_set_sctp_delayed_sack_time_default(
to_uint32(s.delayedSackTime.value_or(20ms).count()));
// RTO
// RTO settings
// RFC 2988 recommends a 1s min RTO, which is very high, but TCP on Linux has a 200ms min RTO
usrsctp_sysctl_set_sctp_rto_min_default(
to_uint32(s.minRetransmitTimeout.value_or(1000ms).count()));
to_uint32(s.minRetransmitTimeout.value_or(200ms).count()));
// Set only 10s as max RTO instead of 60s for shorter connection timeout
usrsctp_sysctl_set_sctp_rto_max_default(
to_uint32(s.maxRetransmitTimeout.value_or(10000ms).count()));
usrsctp_sysctl_set_sctp_rto_initial_default(
to_uint32(s.initialRetransmitTimeout.value_or(1000ms).count()));
usrsctp_sysctl_set_sctp_init_rto_max_default(
to_uint32(s.maxRetransmitTimeout.value_or(10000ms).count()));
// Still set 1s as initial RTO
usrsctp_sysctl_set_sctp_rto_initial_default(
to_uint32(s.initialRetransmitTimeout.value_or(1000ms).count()));
// RTX
// RTX settings
// 5 retransmissions instead of 8 to shorten the backoff for shorter connection timeout
auto maxRtx = to_uint32(s.maxRetransmitAttempts.value_or(5));
usrsctp_sysctl_set_sctp_init_rtx_max_default(maxRtx);
usrsctp_sysctl_set_sctp_assoc_rtx_max_default(maxRtx);