From: ts <decoux@...>
Date: 2002-11-06T01:39:09+09:00
Subject: Re: UDPSocket - bidirectional communication through one socket?

>>>>> "W" == Wejn  <lists+rubytalk@box.cz> writes:

W> If there's no possibility to use it in the way:

W>      host1:X <---------------------> host2:X

W> i'll have to use the (bad) model:
    
W>       host1:X ----------------------> host2:Y
W>       host1:Y <---------------------- host2:X

W> but I'm still trying to avoid that, if possible.

 Well, I don't understand sorry

pigeon% cat b.rb
#!/usr/bin/ruby
require 'socket'
$count = 4

$sock = UDPSocket.new
m = Thread.new do
   $sock.bind('pigeon', 6666)
   mesg = 0
   while true
      if IO.select([$sock], nil, nil, 0)
         p $sock.recvfrom(1024)[0]
         mesg += 1
         break if mesg == $count
      else
         p "..."
         sleep 0.5
      end
   end
end

Thread.new do
   $count.times do |i|
      sleep 1
      $sock.send("pigeon ==> hello #{i}", 0, 'moulon', 6666)
   end
end.join

m.join
pigeon% 

moulon% cat b.rb
#!/usr/bin/ruby
require 'socket'
$count = 4

$sock = UDPSocket.new
m = Thread.new do
   $sock.bind('moulon', 6666)
   mesg = 0
   while true
      if IO.select([$sock], nil, nil, 0)
         p $sock.recvfrom(1024)[0]
         mesg += 1
         break if mesg == $count
      else
         p "..."
         sleep 0.5
      end
   end
end

sleep 3 # stupid synchronisation
Thread.new do
   $count.times do |i|
      sleep 1
      $sock.send("moulon => hello #{i}", 0, 'pigeon', 6666)
   end
end.join

m.join
moulon%
 
moulon% b.rb
"..."
"..."
"..."
"..."
"..."
"..."
"..."
"pigeon ==> hello 0"
"..."
"..."
"pigeon ==> hello 1"
"..."
"..."
"pigeon ==> hello 2"
"..."
"..."
"pigeon ==> hello 3"
moulon%

pigeon% b.rb
"..."
"..."
"..."
"..."
"moulon => hello 0"
"..."
"..."
"moulon => hello 1"
"..."
"..."
"moulon => hello 2"
"..."
"..."
"moulon => hello 3"
pigeon% 



Guy Decoux