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Added max burst setting for SCTP

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This commit is contained in:
Paul-Louis Ageneau
2021-04-20 19:18:06 +02:00
parent 48a275f830
commit 282ca48b12
4 changed files with 11 additions and 0 deletions
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2
include/rtc/global.hpp
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@ -46,10 +46,12 @@ RTC_EXPORT void Preload();
RTC_EXPORT void Cleanup();
struct SctpSettings {
// For the following settings, not set means optimized default
optional<size_t> recvBufferSize;
optional<size_t> sendBufferSize;
optional<size_t> maxChunksOnQueue;
optional<size_t> initialCongestionWindow;
optional<size_t> maxBurst;
optional<unsigned int> congestionControlModule;
optional<std::chrono::milliseconds> delayedSackTime;
};

1
include/rtc/rtc.h
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@ -226,6 +226,7 @@ typedef struct {
int sendBufferSize; // <= 0 means optimized default
int maxChunksOnQueue; // <= 0 means optimized default
int initialCongestionWindow; // <= 0 means optimized default
int maxBurst; // 0 means optimized default, < 0 means disabled
int congestionControlModule; // <= 0 means default (0: RFC2581, 1: HSTCP, 2: H-TCP, 3: RTCC)
int delayedSackTimeMs; // <= 0 means optimized default
} rtcSctpSettings;

5
src/capi.cpp
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@ -683,6 +683,11 @@ int rtcSetSctpSettings(const rtcSctpSettings *settings) {
if (settings->initialCongestionWindow > 0)
s.initialCongestionWindow = size_t(settings->initialCongestionWindow);
if (settings->maxBurst > 0)
s.maxBurst = size_t(settings->maxBurst);
else if (settings->maxBurst < 0)
s.maxBurst = size_t(0); // setting to 0 disables, not setting chooses optimized default
if (settings->congestionControlModule >= 0)
s.congestionControlModule = unsigned(settings->congestionControlModule);

3
src/impl/sctptransport.cpp
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@ -115,6 +115,9 @@ void SctpTransport::SetSettings(const SctpSettings &s) {
// Increase initial congestion window size to 10 MTUs (RFC 6928) by default
usrsctp_sysctl_set_sctp_initial_cwnd(to_uint32(s.initialCongestionWindow.value_or(10)));
// Set max burst to 10 MTUs by default (max burst is initially 0, meaning disabled)
usrsctp_sysctl_set_sctp_max_burst_default(to_uint32(s.maxBurst.value_or(10)));
// Use standard SCTP congestion control (RFC 4960) by default
// See https://github.com/paullouisageneau/libdatachannel/issues/354
usrsctp_sysctl_set_sctp_default_cc_module(to_uint32(s.congestionControlModule.value_or(0)));