turboladen · August 1, 2013 17:36 · Aug 1, 2013
diff --git a/porty.rb b/porty.rb
@@ -0,0 +1,47 @@
+# Thanks to http://rubysource.com/build-a-port-scanner-in-ruby
+
+require 'celluloid'
+require 'socket'
+
+class ScanPort
+  include Celluloid
+
+  def initialize(start_port, end_port, host)
+    @start_port = start_port
+    @end_port = end_port
+    @host = host
+  end
+
+  def run
+    until @start_port == @end_port do
+      scan @start_port
+      @start_port += 1
+    end
+  end
+
+  def scan(port)
+    begin
+      sock = TCPSocket.new(@host, port)
+      puts "#{port} open." if sock
+    rescue => ex
+      p ex unless ex.is_a?(Errno::ECONNREFUSED)
+    ensure
+      sock.close if sock
+    end
+  end
+end
+
+def main
+  host = ARGV[0]
+  start_port = ARGV[1].to_i
+  end_port = ARGV[2].to_i
+  segment_size = 100
+
+  until start_port >= end_port do
+    sp = ScanPort.new start_port, start_port + segment_size, host
+    sp.async.run
+    start_port += segment_size
+  end
+end
+
+main
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