Add debug udp offload info

conn/bind_std.go

@@ -298,6 +298,11 @@ func (s *StdNetBind) BatchSize() int {
 	return 1
 }
 
+func (s *StdNetBind) GetOffloadInfo() string {
+	return fmt.Sprintf("ipv4TxOffload: %v, ipv4RxOffload: %v\nipv6TxOffload: %v, ipv6RxOffload: %v",
+		s.ipv4TxOffload, s.ipv4RxOffload, s.ipv6TxOffload, s.ipv6RxOffload)
+}
+
 func (s *StdNetBind) Close() error {
 	s.mu.Lock()
 	defer s.mu.Unlock()

conn/bind_windows.go

@@ -328,6 +328,10 @@ func (bind *WinRingBind) BatchSize() int {
 	return 1
 }
 
+func (bind *WinRingBind) GetOffloadInfo() string {
+	return ""
+}
+
 func (bind *WinRingBind) SetMark(mark uint32) error {
 	return nil
 }

conn/bindtest/bindtest.go

@@ -91,6 +91,8 @@ func (c *ChannelBind) Close() error {
 
 func (c *ChannelBind) BatchSize() int { return 1 }
 
+func (c *ChannelBind) GetOffloadInfo() string { return "" }
+
 func (c *ChannelBind) SetMark(mark uint32) error { return nil }
 
 func (c *ChannelBind) makeReceiveFunc(ch chan []byte) conn.ReceiveFunc {

conn/conn.go

@@ -55,6 +55,8 @@ type Bind interface {
 	// BatchSize is the number of buffers expected to be passed to
 	// the ReceiveFuncs, and the maximum expected to be passed to SendBatch.
 	BatchSize() int
+
+	GetOffloadInfo() string
 }
 
 // BindSocketToInterface is implemented by Bind objects that support being

device/device.go

@@ -545,6 +545,7 @@ func (device *Device) BindUpdate() error {
 	}
 
 	device.log.Verbosef("UDP bind has been updated")
+	device.log.Verbosef(netc.bind.GetOffloadInfo())
 	return nil
 }