Support for the Ruby 2.4 series has ended. See here for reference.
UDP/IP address information used by Socket.udp_server_loop.
remote_address is an Addrinfo object.
local_address is an Addrinfo object.
reply_proc is a Proc used to send reply back to the source.
 
               # File socket/lib/socket.rb, line 1023
def initialize(remote_address, local_address, &reply_proc)
  @remote_address = remote_address
  @local_address = local_address
  @reply_proc = reply_proc
end