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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi All,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I would like to know a little bit more about how to use ‘flowvar’ within signatures. Based on Victor’s blog post, I think it’s clear to me how to get/set flowvar values from Lua:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><a href="http://blog.inliniac.net/2013/04/18/suricata-lua-scripting-flowvar-access/">http://blog.inliniac.net/2013/04/18/suricata-lua-scripting-flowvar-access/</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>But I’ve seen very little documentation about using them within the signatures themselves. The blog post seems to indicate that it is possible.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This is what I would like to do:<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>In one signature, extract a string using pcre, and set the extracted string to a flowvar – The syntax for doing this is not clear to me<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>In a separate signature, invoke a luajit script to access the flowvar and append it to some output – I think I am clear on this per Victor’s blog post<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I realize I could accomplish the first item (extracting/setting the flowvar) in a lua script, but I wanted to see if it was possible to do it in the signature, and figured this would be a good opportunity to learn.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Also, I’m happy to update the wiki/documentation once I get this figured out.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks in advance!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Zach<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Franklin Gothic Book",sans-serif'>________________________<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Book",sans-serif'>Zach Rasmor<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Franklin Gothic Book",sans-serif'>Senior Software Engineer<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Franklin Gothic Book",sans-serif'>Lockheed Martin CIRT<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Franklin Gothic Book",sans-serif'>700 N Frederick Ave | Gaithersburg, MD 20879<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Franklin Gothic Book",sans-serif'>Email: <a href="mailto:zachary.r.rasmor@lmco.com"><span style='color:blue'>zachary.r.rasmor@lmco.com</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Franklin Gothic Book",sans-serif'>Office: 301.240.6116<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>