IpAddress.hashCode() not unique per ip/port

Current implementation produces hashcode where ip/port combos "1.2.3.4:2" and "1.2.3.5:1" result in the same hash code.

Existing code:
public final int hashCode()

{ return ip_addr != null ? ip_addr.hashCode() + port : port; }

Manual test code:
InetAddress ip1 = InetAddress.getByAddress( new byte[]

{1,2,3,4}

);
int port1 = 2;
int hash1 = ip1.hashCode() + port1;
System.out.println( "hash1 = " + hash1 );

InetAddress ip2 = InetAddress.getByAddress( new byte[]

{1,2,3,5}

);
int port2 = 1;
int hash2 = ip2.hashCode() + port2;
System.out.println( "hash2 = " + hash2 );