Commits on Nov 19, 2024

1. Support IPV6_ADDR_PREFERENCES until Java 24 and beyond …

   While reflection on Java's internals is slowly being crippled, Unsafe
   access is still possible (at least until JEP 417 [0] reaches phase 3 in
   Java 26 or later).
   
   This requires moving from DatagramSocket to DatagramChannel as the
   former is substantially rewritten in Java 15 (JEP 373, see [1]) as a
   wrapper around the latter. The channel-based socket cannot be used in
   Java versions prior to 14 due to Java bug JDK-8232673 [2] which prevents
   read/write concurrency, effectively stalling the node.
   
   Tested on OpenJDK 8, 11, 17, 21, 23, and 24.
   Fixes bug 07217.
   
   [0] https://openjdk.org/jeps/471
   [1] https://openjdk.org/jeps/373
   [2] https://bugs.openjdk.org/browse/JDK-8232673

   

   bertm committed Nov 19, 2024
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