fix: should correctly set dialer alive property

control/connectivity.go

@@ -5,10 +5,20 @@
 
 package control
 
-import "github.com/cilium/ebpf"
+import (
+	"github.com/cilium/ebpf"
+	"github.com/sirupsen/logrus"
+)
 
 func (c *ControlPlaneCore) OutboundAliveChangeCallback(outbound uint8) func(alive bool, l4proto uint8, ipversion uint8) {
 	return func(alive bool, l4proto uint8, ipversion uint8) {
+		c.log.WithFields(logrus.Fields{
+			"alive":       alive,
+			"l4proto":     l4proto,
+			"ipversion":   ipversion,
+			"outbound_id": outbound,
+		}).Tracef("outbound alive state changed")
+
 		value := uint32(0)
 		if alive {
 			value = 1

control/udp.go

@@ -206,6 +206,12 @@ getNew:
 	}
 	// If the udp endpoint has been not alive, remove it from pool and get a new one.
 	if !isNew && !ue.Dialer.MustGetAlive(l4proto, ipversion) {
+		c.log.WithFields(logrus.Fields{
+			"src":       src.String(),
+			"l4proto":   l4proto,
+			"ipversion": ipversion,
+			"dialer":    ue.Dialer.Name(),
+		}).Debugln("Old udp endpoint is not alive and removed")
 		_ = DefaultUdpEndpointPool.Remove(src, ue)
 		goto getNew
 	}