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-rw-r--r--pkg/tcpip/stack/stack.go3
1 files changed, 3 insertions, 0 deletions
diff --git a/pkg/tcpip/stack/stack.go b/pkg/tcpip/stack/stack.go
index dc4f5b3e7..026d330c4 100644
--- a/pkg/tcpip/stack/stack.go
+++ b/pkg/tcpip/stack/stack.go
@@ -171,6 +171,9 @@ type TCPSenderState struct {
// Outstanding is the number of packets in flight.
Outstanding int
+ // SackedOut is the number of packets which have been selectively acked.
+ SackedOut int
+
// SndWnd is the send window size in bytes.
SndWnd seqnum.Size