Also switch to the correct casing style for local address variables. PiperOrigin-RevId: 233161128 Change-Id: Ibc4a10a5d3ab04c40907aa885e8237b255c65a79
Also includes a few fixes for IPv4 multicast support. IPv6 support is coming in a followup CL. PiperOrigin-RevId: 233008638 Change-Id: If7dae6222fef43fda48033f0292af77832d95e82