akka/akka — pull request #15507 by tdanielwallace (2014-07-07 13:47:34+00:00)
Title: added protocol family argument to Bind message

added new socket option to join a multicast group

This commit provides the means to specify the protocol family (e.g., IPv4 or IPv6) when an actor attempts to bind to a socket using IO(Udp). On systems that are dual stacked, the current implementation will prefer IPv6; preventing a socket from joining an IPv4 multicast group.