From 0e6f7a12c29efa52581c38ca30637b133556a6cf Mon Sep 17 00:00:00 2001 From: Nayana Bidari Date: Tue, 4 Aug 2020 20:57:28 -0700 Subject: Update variables for implementation of RACK in TCP RACK (Recent Acknowledgement) is a new loss detection algorithm in TCP. These are the fields which should be stored on connections to implement RACK algorithm. PiperOrigin-RevId: 324948703 --- pkg/tcpip/stack/stack.go | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'pkg/tcpip/stack') diff --git a/pkg/tcpip/stack/stack.go b/pkg/tcpip/stack/stack.go index 3f07e4159..7189e8e7e 100644 --- a/pkg/tcpip/stack/stack.go +++ b/pkg/tcpip/stack/stack.go @@ -73,6 +73,16 @@ type TCPCubicState struct { WEst float64 } +// TCPRACKState is used to hold a copy of the internal RACK state when the +// TCPProbeFunc is invoked. +type TCPRACKState struct { + XmitTime time.Time + EndSequence seqnum.Value + FACK seqnum.Value + RTT time.Duration + Reord bool +} + // TCPEndpointID is the unique 4 tuple that identifies a given endpoint. type TCPEndpointID struct { // LocalPort is the local port associated with the endpoint. @@ -212,6 +222,9 @@ type TCPSenderState struct { // Cubic holds the state related to CUBIC congestion control. Cubic TCPCubicState + + // RACKState holds the state related to RACK loss detection algorithm. + RACKState TCPRACKState } // TCPSACKInfo holds TCP SACK related information for a given TCP endpoint. -- cgit v1.2.3