From: Regis Aubarede <regis.aubarede@...>
Date: 2009-12-10T20:50:26+09:00
Subject: Re: multicast and windows

Roger Pack wrote:
> 
>> Were any VM's successful?
>> Did you try it with BasicSocket.do_not_reverse_lookup = true?
yes
>Have you tried it with linux at all? how does it work there?
now, yes
> 
> Did you try 1.9.1 on doze?
now, yes
> -r


Some other test :
Linux : ok with ruby 1.8 (ubuntu 9.10 and "route add 224.0.0.0..." )
windows : ruby 1.9.1 : Nok (no receive)
                     (TCP/IP on ruby 1.9/windows  is realy broken !)
jruby 1.4.0 : error on socket.bind

by


==========================================================
here i my test code (working file in attachement) :

Thread.abort_on_exception = true
Socket.do_not_reverse_lookup = true

class MulticastSender
 def initialize(ip,port)
    @ip,@port=[ip,port]
  @addr = IPAddr.new(@ip).hton + IPAddr.new("0.0.0.0").hton
  @version=0
  puts "Emitter mutlticast in " + ip + "/" + port.to_s + " ..."
  Thread.new { loop { run ; sleep(3) } }
 end

 def run
  @version+=1
  @version = @version % 1000
  socket = UDPSocket.open
  #socket.setsockopt(Socket::IPPROTO_IP, Socket::IP_TTL, [10].pack('i'))
  max=1+rand(3)
  0.upto(max) { |no|
    mess = Time.now.to_f.to_s
  puts "sending mc " + mess
    socket.send(mess, 0, @ip , @port)
  sleep(0.01)
  }
 ensure
  socket.close rescue puts $!.to_s
 end
end

class MulticastReceiver
 def initialize(ip,port)
    @sip,@port=[ip,port]
  @version=0
  host =  IPAddr.new(@sip).hton +  IPAddr.new("0.0.0.0").hton
    sock = UDPSocket.new
    sock.bind(Socket::INADDR_ANY, port) if isWindows()

    sock.setsockopt(Socket::IPPROTO_IP, Socket::IP_ADD_MEMBERSHIP, host)
    sock.setsockopt(Socket::IPPROTO_IP, Socket::IP_MULTICAST_LOOP, 
"\000")  if defined?(Socket::IP_MULTICAST_LOOP)
  sock.setsockopt(Socket::IPPROTO_IP, Socket::IP_MULTICAST_TTL, 3) 
if defined?(Socket::IP_MULTICAST_TTL)
    sock.setsockopt(Socket::IPPROTO_IP, Socket::IP_TTL, 3) 
if defined?(Socket::IP_TTL)

    sock.bind(Socket::INADDR_ANY, port) unless isWindows()

  puts "Wait receiving mutlticast in " + @sip + "/" + port.to_s + " ..."
  Thread.new { loop { run(sock) } }
 end
 def run(sock)
   msg, (family, port, hostname, address) = sock.recvfrom(1024)
   d=Time.now
   puts "MSG: from #{address} (#{hostname})/#{family} len #{msg.size} == 
#{msg.inspect }"
 end
end



Attachments:
http://www.ruby-forum.com/attachment/4310/test_mc.rb

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