add InetSocketAddress::IsMatchingType and use it

src/internet-node/udp-socket.cc

@@ -91,6 +91,10 @@ UdpSocket::Bind (void)
 int 
 UdpSocket::Bind (const Address &address)
 {
+  if (!InetSocketAddress::IsMatchingType (address))
+    {
+      return ERROR_INVAL;
+    }
   InetSocketAddress transport = InetSocketAddress::ConvertFrom (address);
   Ipv4Address ipv4 = transport.GetIpv4 ();
   uint16_t port = transport.GetPort ();

src/node/inet-socket-address.cc

@@ -45,6 +45,12 @@ InetSocketAddress::SetIpv4 (Ipv4Address address)
   m_ipv4 = address;
 }
 
+bool 
+InetSocketAddress::IsMatchingType (const Address &address)
+{
+  return address.CheckCompatible (GetType (), 6);
+}
+
 Address 
 InetSocketAddress::ConvertTo (void) const
 {

src/node/inet-socket-address.h

@@ -64,6 +64,8 @@ public:
    */
   void SetIpv4 (Ipv4Address address);
 
+  static bool IsMatchingType (const Address &address);
+
   /**
    * \returns an Address instance which represents this
    * InetSocketAddress instance.

src/node/socket.h

@@ -52,6 +52,7 @@ public:
     ERROR_AGAIN,
     ERROR_SHUTDOWN,
     ERROR_OPNOTSUPP,
+    ERROR_INVAL,
     SOCKET_ERRNO_LAST
   };