gistfile1.txt

#-*- coding:utf-8 -*-
require "socket"

def telnet_proc(cmd, isrc, idst)
  begin
    fmt = "#{Time.new}, #{isrc}, #{idst}, #{cmd.chomp!}"
    `echo #{fmt} >> ~/Desktop/telnet_out.txt`
    `echo '#{cmd}' | hexdump -C >> ~/Desktop/telnet_out.txt`  
    return "CONNECTION SUCCESS"
  rescue
    return "CONNECTION SUCCESS"
  end
end
ts = TCPServer.open(23235)
# SYN(A) -> SYN+ACK(S) -> RST(A) / SYN+ACK or RST+ACK.
sock = ts.accept
while buf = sock.gets
 puts telnet_proc(buf, sock.peeraddr[1], sock.peeraddr[2])
end
sock.close
ts.close