git: openjdk/mobile: 8237890: DatagramPacket::getSocketAddress doesn't specify what happens if address or port are not set

[duke]

Changeset: 8e21a2a1
Author:    Patrick Concannon <pconcannon at openjdk.org>
Date:      2020-04-22 12:34:09 +0000
URL:       https://git.openjdk.java.net/mobile/commit/8e21a2a1

8237890: DatagramPacket::getSocketAddress doesn't specify what happens if address or port are not set

This fix changes the default port of a DatagramPacket from -1 to 0, which changes the behaviour of calling getSocketAddress with no port set from throwing an IAE to returning an InetSocketAddress representing any local address with port 0.

Reviewed-by: alanb, chegar, dfuchs

! src/java.base/share/classes/java/net/DatagramPacket.java
! src/java.base/share/classes/sun/nio/ch/DatagramSocketAdaptor.java
! test/jdk/java/net/DatagramPacket/Constructor.java
+ test/jdk/java/net/DatagramPacket/Getters.java
! test/jdk/java/net/DatagramSocket/SendCheck.java