1 files changed, 43 insertions, 0 deletions
diff --git a/features/support/helpers/sniffing_helper.rb b/features/support/helpers/sniffing_helper.rb
new file mode 100644
index 00000000..213411eb
--- /dev/null
+++ b/features/support/helpers/sniffing_helper.rb
@@ -0,0 +1,43 @@
+#
+# Sniffer is a very dumb wrapper to start and stop tcpdumps instances, possibly
+# with customized filters. Captured traffic is stored in files whose name
+# depends on the sniffer name. The resulting captured packets for each sniffers
+# can be accessed as an array through its `packets` method.
+#
+# Use of more rubyish internal ways to sniff a network like with pcap-able gems
+# is waaay to much resource consumming, notmuch reliable and soooo slow. Let's
+# not bother too much with that. :)
+#
+# Should put all that in a Module.
+
+class Sniffer
+
+  attr_reader :name, :pcap_file, :pid
+
+  def initialize(name, vmnet)
+    @name = name
+    @vmnet = vmnet
+    pcap_name = sanitize_filename("#{name}.pcap")
+    @pcap_file = "#{$config["TMPDIR"]}/#{pcap_name}"
+  end
+
+  def capture(filter="not ether src host #{@vmnet.bridge_mac} and not ether proto \\arp and not ether proto \\rarp")
+    job = IO.popen(["/usr/sbin/tcpdump", "-n", "-i", @vmnet.bridge_name, "-w",
+                    @pcap_file, "-U", filter, :err => ["/dev/null", "w"]])
+    @pid = job.pid
+  end
+
+  def stop
+    begin
+      Process.kill("TERM", @pid)
+    rescue
+      # noop
+    end
+  end
+
+  def clear
+    if File.exist?(@pcap_file)
+      File.delete(@pcap_file)
+    end
+  end
+end