Begin generic Bind implementation

src/conn_default.go

@@ -13,11 +13,68 @@ import (
  * See conn_linux.go for an implementation on the linux platform.
  */
 
-type Endpoint *net.UDPAddr
+type NativeBind struct {
+	ipv4 *net.UDPConn
+	ipv6 *net.UDPConn
+}
 
-type NativeBind *net.UDPConn
+type NativeEndpoint net.UDPAddr
 
-func CreateUDPBind(port uint16) (UDPBind, uint16, error) {
+var _ Bind = (*NativeBind)(nil)
+var _ Endpoint = (*NativeEndpoint)(nil)
+
+func CreateEndpoint(s string) (Endpoint, error) {
+	addr, err := parseEndpoint(s)
+	return (addr).(*NativeEndpoint), err
+}
+
+func (_ *NativeEndpoint) ClearSrc() {}
+
+func (e *NativeEndpoint) DstIP() net.IP {
+	return (*net.UDPAddr)(e).IP
+}
+
+func (e *NativeEndpoint) SrcIP() net.IP {
+	return nil // not supported
+}
+
+func (e *NativeEndpoint) DstToBytes() []byte {
+	addr := (*net.UDPAddr)(e)
+	out := addr.IP.([]byte)
+	out = append(out, byte(addr.Port&0xff))
+	out = append(out, byte((addr.Port>>8)&0xff))
+	return out
+}
+
+func (e *NativeEndpoint) DstToString() string {
+	return (*net.UDPAddr)(e).String()
+}
+
+func (e *NativeEndpoint) SrcToString() string {
+	return ""
+}
+
+func listenNet(net string, port int) (*net.UDPConn, int, error) {
+
+	// listen
+
+	conn, err := net.ListenUDP("udp", &UDPAddr{Port: port})
+	if err != nil {
+		return nil, 0, err
+	}
+
+	// retrieve port
+
+	laddr := conn.LocalAddr()
+	uaddr, _ = net.ResolveUDPAddr(
+		laddr.Network(),
+		laddr.String(),
+	)
+
+	return conn, uaddr.Port, nil
+}
+
+func CreateBind(port uint16) (Bind, uint16, error) {
 
 	// listen
 
@@ -38,9 +95,3 @@ func CreateUDPBind(port uint16) (UDPBind, uint16, error) {
 	)
 	return uaddr.Port
 }
-
-func (_ Endpoint) ClearSrc() {}
-
-func SetMark(conn *net.UDPConn, value uint32) error {
-	return nil
-}