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wgengine/netstack: switch to cubic congestion control #24

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Merged
merged 1 commit into from
May 9, 2023
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wgengine/netstack: switch to cubic congestion control #24

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5 changes: 5 additions & 0 deletions wgengine/netstack/netstack.go
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Original file line number Diff line number Diff line change
Expand Up @@ -179,6 +179,11 @@ func Create(logf logger.Logf, tundev *tstun.Wrapper, e wgengine.Engine, mc *magi
if tcpipErr != nil {
return nil, fmt.Errorf("could not enable TCP SACK: %v", tcpipErr)
}
congestionOpt := tcpip.CongestionControlOption("cubic") // Reno is used by default
tcpipErr = ipstack.SetTransportProtocolOption(tcp.ProtocolNumber, &congestionOpt)
if tcpipErr != nil {
return nil, fmt.Errorf("could not set TCP congestion control: %v", tcpipErr)
}
linkEP := &protectedLinkEndpoint{Endpoint: channel.New(512, tstun.DefaultMTU(), "")}
if tcpipProblem := ipstack.CreateNIC(nicID, linkEP); tcpipProblem != nil {
return nil, fmt.Errorf("could not create netstack NIC: %v", tcpipProblem)
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