PacketFilter does not need to implement net.PacketConn

conn.go

@@ -22,7 +22,7 @@ type FilteredConn struct {
 
 // LocalAddr returns the local address
 func (r *FilteredConn) LocalAddr() net.Addr {
-	return r.source.LocalAddr()
+	return r.source.conn.LocalAddr()
 }
 
 // SetReadDeadline sets a read deadline
@@ -33,7 +33,7 @@ func (r *FilteredConn) SetReadDeadline(t time.Time) error {
 
 // SetWriteDeadline sets a write deadline
 func (r *FilteredConn) SetWriteDeadline(t time.Time) error {
-	return r.source.SetWriteDeadline(t)
+	return r.source.conn.SetWriteDeadline(t)
 }
 
 // SetDeadline sets a read and a write deadline
@@ -53,7 +53,7 @@ func (r *FilteredConn) WriteTo(b []byte, addr net.Addr) (n int, err error) {
 	if r.filter != nil {
 		r.filter.Outgoing(b, addr)
 	}
-	return r.source.WriteTo(b, addr)
+	return r.source.conn.WriteTo(b, addr)
 }
 
 // ReadFrom reads from the filtered connection

filter.go

@@ -19,7 +19,7 @@ type Filter interface {
 // connection.
 func NewPacketFilter(conn net.PacketConn) *PacketFilter {
 	d := &PacketFilter{
-		PacketConn: conn,
+		conn: conn,
 	}
 	return d
 }
@@ -30,7 +30,7 @@ type PacketFilter struct {
 	dropped  uint64
 	overflow uint64
 
-	net.PacketConn
+	conn net.PacketConn
 
 	conns []*FilteredConn
 	mut   sync.Mutex
@@ -96,7 +96,7 @@ func (d *PacketFilter) loop() {
 next:
 	for {
 		buf = bufPool.Get().([]byte)
-		n, addr, err := d.ReadFrom(buf)
+		n, addr, err := d.conn.ReadFrom(buf)
 		pkt := packet{
 			n:    n,
 			addr: addr,