Module: David::Server::Multicast

Included in:
David::Server
Defined in:
lib/david/server/multicast.rb

Overview

See tools.ietf.org/html/rfc7252#section-12.8

Instance Method Summary collapse

Instance Method Details

#multicast_initialize! ⇒ Object 



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# File 'lib/david/server/multicast.rb', line 5

def multicast_initialize!
  @socket.to_io.setsockopt(Socket::SOL_SOCKET, Socket::SO_REUSEADDR, 1)

  if ipv6?
    maddrs = ['ff02::fd', 'ff05::fd']
    maddrs << 'ff02::1' if OS.osx? # OSX needs ff02::1 explicitly joined.
    maddrs.each { |maddr| multicast_listen_ipv6(maddr) }

    setsockopts_ipv6
  else
    maddrs = ['224.0.1.187']
    multicast_listen_ipv4(maddrs.first)

    setsockopts_ipv4
  end

  log.debug("Joined multicast groups: #{maddrs.join(', ')}")
rescue Errno::ENODEV, Errno::EADDRNOTAVAIL
  log.warn('Multicast initialization failure: Device not found.')
  @options[:Multicast] = false
end