[jboss-jira] [JBoss JIRA] (JGRP-1970) UDP: use MulticastSocket to send messages

UDP: use MulticastSocket to send messages ----------------------------------------- Key: JGRP-1970 URL: https://issues.jboss.org/browse/JGRP-1970 Project: JGroups Issue Type: Task Reporter: Bela Ban Assignee: Bela Ban Fix For: 3.6.7 Currently, due to [1], we use a {{MulticastSocket}} to _receive_ multicast packets, but a {{DatagramSocket}} to _send_ multicast packets (and send and receive unicast packets). The reason was that we needed to get the IP address and port of the sender of a message. Due to a programming error, this was not the case earlier. Now, I changed the code to use a {{MulticastSocket}} instead of a {{DatagramSocket}} to send multicasts (and send/receive unicasts). Works perfectly and performance (4 nodes) is about the same. In addition, we can now call {{MulticastSocket.setTimeToLive()}}, even on Windows, preventing the exception trying to set {{ip_ttl}} on Windows (java.net.DualStackPlainDatagramSocketImpl.setTimeToLive()). [1] https://issues.jboss.org/browse/JGRP-1765 [2] https://github.com/belaban/JGroups/wiki/FAQ