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| author | Nayana Bidari <nybidari@google.com> | 2020-08-04 20:57:28 -0700 |
|---|---|---|
| committer | gVisor bot <gvisor-bot@google.com> | 2020-08-04 20:59:34 -0700 |
| commit | 0e6f7a12c29efa52581c38ca30637b133556a6cf (patch) | |
| tree | 27f8e6dcb01c371314eab96423f98a3d88d442b1 /pkg/tcpip/stack/stack.go | |
| parent | 87ee3898f78cb7d520281ead600036052d6a2049 (diff) | |
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
Diffstat (limited to 'pkg/tcpip/stack/stack.go')
| -rw-r--r-- | pkg/tcpip/stack/stack.go | 13 |
1 files changed, 13 insertions, 0 deletions
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. |