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206 ligi 1
# mailto: ligi atttt ligi dotttt de
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require 'socket'
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require 'fcntl'
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class IPSocket
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  def portInfo(out = STDOUT)
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    out.puts "local:  #{addr[1]}\n" +
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      "remote: #{peeraddr[1]}"
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  end
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end
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if ARGV.length!=1 || !ARGV[0].include?(":")
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  puts "USAGE:"
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  puts "$> ruby messenger.rb [ip:port]"
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  puts ""
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  puts "using default address"
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  host="0"
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  port=9876
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else
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  host=ARGV[0].split(":").first
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  port=ARGV[0].split(":").last.to_i  
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end
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puts "starting server at ip " + host + " port:" + port.to_s
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serverSocket = TCPServer.new(host,port)
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slots={ }
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server = Thread.start {
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  while (clientSocket = serverSocket.accept)
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    Thread.start {
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      clientSocket_= clientSocket
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      clientSocket_.portInfo
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      while true
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      begin
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        command=clientSocket_.gets
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        puts command
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        case
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        when command =~ /new/
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          clientSocket_.puts "new"
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          if slots[command.delete("\r\n").split(":").last].nil?
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            slots[command.delete("\r\n").split(":").last]={:from=>clientSocket_ , :to=>nil}
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            break
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          else
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             clientSocket_.puts "slot exists"
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          end
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        when command =~ /conn/
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          case
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          when slots[command.delete("\r\n").split(":").last].nil?
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            clientSocket_.puts "slot not found"
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          when !slots[command.delete("\r\n").split(":").last][:to].nil?
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            clientSocket_.puts "slot has partner"
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          else
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            clientSocket_.puts "conn"
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            slots[command.delete("\r\n").split(":").last][:to]=clientSocket_
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            break
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          end
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        when command =~ /all/
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#          clientSocket_.puts slots.keys
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          if slots=={}
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              clientSocket_.puts "none"
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          else
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          slots.keys.each_with_index {|slot,i|
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              clientSocket_.puts i.to_s + " | " + slot + ((slots[slot][:to].nil?)?"| free":"| connected")
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            }
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          end
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        else
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          clientSocket_.puts "Unknown command"
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      end
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        rescue =>e
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        puts "err" + e
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      end
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      end
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    }
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end
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}
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while true
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slots.each { |slot_name,hash|
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#puts " processing " + slot_name
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if !hash[:to].nil?
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begin
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got=hash[:to].read_nonblock(3000)
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puts slot_name +"<"+ got
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hash[:from].write got
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hash[:to].flush
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rescue  Errno::EAGAIN => e
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rescue =>e
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 slots[slot_name][:to]=nil
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  p e
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end
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end
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begin
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got=hash[:from].read_nonblock(3000)
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puts slot_name +">"+ got
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hash[:to].write got if !hash[:to].nil?
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hash[:to].flush  if !hash[:to].nil?
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rescue  Errno::EAGAIN => e
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rescue =>e
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hash[:to].close if !hash[:to].nil?
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 slots.delete(slot_name)
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  p e
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end
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#
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}
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sleep 0.00005
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end