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Diffstat (limited to 'features/support/helpers/sniffing_helper.rb')
-rw-r--r-- | features/support/helpers/sniffing_helper.rb | 43 |
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 |