Add new retransmissions and recovery related metrics.

PiperOrigin-RevId: 236945145
Change-Id: I051760d95154ea5574c8bb6aea526f488af5e07b

1 files changed, 22 insertions, 0 deletions

diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go
index 49cc8705a..7010d1b68 100644
--- a/pkg/tcpip/tcpip.go
+++ b/pkg/tcpip/tcpip.go
@@ -628,6 +628,28 @@ type TCPStats struct {
 
 	// ResetsReceived is the number of TCP resets received.
 	ResetsReceived *StatCounter
+
+	// Retransmits is the number of TCP segments retransmitted.
+	Retransmits *StatCounter
+
+	// FastRecovery is the number of times Fast Recovery was used to
+	// recover from packet loss.
+	FastRecovery *StatCounter
+
+	// SACKRecovery is the number of times SACK Recovery was used to
+	// recover from packet loss.
+	SACKRecovery *StatCounter
+
+	// SlowStartRetransmits is the number of segments retransmitted in slow
+	// start.
+	SlowStartRetransmits *StatCounter
+
+	// FastRetransmit is the number of segments retransmitted in fast
+	// recovery.
+	FastRetransmit *StatCounter
+
+	// Timeouts is the number of times the RTO expired.
+	Timeouts *StatCounter
 }
 
 // UDPStats collects UDP-specific stats.