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authorPhilip Hands <phil@hands.com>2016-03-14 15:36:16 +0100
committerHolger Levsen <holger@layer-acht.org>2016-04-28 21:52:10 +0200
commitda080c472fc415b0ce918f4dd4a1ab143bb1bca4 (patch)
treebf63179f32f0eda0c2d5796e3e31c18c3c1185cf /features/support/helpers/sniffing_helper.rb
parent26a9e8ec2bcae03db4d663d87b44d8708d64fdc2 (diff)
downloadjenkins.debian.net-da080c472fc415b0ce918f4dd4a1ab143bb1bca4.tar.xz
rough attempt to grab the good cucumber bits from recent tails
Diffstat (limited to 'features/support/helpers/sniffing_helper.rb')
-rw-r--r--features/support/helpers/sniffing_helper.rb43
1 files changed, 43 insertions, 0 deletions
diff --git a/features/support/helpers/sniffing_helper.rb b/features/support/helpers/sniffing_helper.rb
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+++ b/features/support/helpers/sniffing_helper.rb
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+#
+# 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