Do you have an SBC or switch that already measures this and outputs it with the CDR? Do you want to report on all PDD long-term? Or just one or two specific calls? Regards, Richard From: "Calvin E." <calvine at gmail.com> Date: Monday, April 20, 2015 at 4:07 PM To: VoiceOps <voiceops at voiceops.org>, <beckman at angryox.com> Subject: Re: [VoiceOps] Easy ways to measure PDD
Since you can already parse the pcap, here's a napkin sketch assuming something like php, bash, tcsh, etc. Were you looking for something more specific?
Find all INVITEs, store (as in-memory temp data) timestamps, Call-ID, and CSeq Find first matching non-100 response for each INVITE based on Call-ID and Cseq (in case there are later reinvites) Calculate difference in timestamp ... Profit!
On Mon, Apr 20, 2015 at 11:35 AM, Peter Beckman <beckman at angryox.com> wrote:
Thanks Matthew... but...
"I don't want to manage yet another server or metrics repository in order to hold all of this call data..."
This requires a whole pile of new software to be installed AND MySQL to be run somewhere. http://www.voipmonitor.org/doc/Architecture
I have .pcap files from tcpdump with the call data. sngrep can parse it very fast and very well, but it is a curses-GUI and I need something I can automate.
Dream workflow:
sipgrep --packet-type-start INVITE --report pdd --direction outbound \ --input-packet-capture sip07.pcap \ | shell-script-mangle \ | xargs -n1 push-metrics
This way I can have a graph of PDD per termination partner (the shell-script-mangle would translate IP addresses into service provider tags/names) and push the metrics to my existing metrics system (statsd + graphite + grafana) and alert when things pass a threshold.
Beckman
On Mon, 20 Apr 2015, Matthew Crocker wrote:
www.voipmonitor.org <http://www.voipmonitor.org>
PDD charts and so, so much more.
On Apr 20, 2015, at 5:11 PM, Peter Beckman <beckman at angryox.com> wrote:
So after a recent discussion about how to quickly diagnose SIP calls from packets (tcpdump + sngrep for the win!), I'm now wondering if there is a tool I don't know about that would be able to parse the same .pcap file that contains all of my port 5060 traffic and output the PDD time for each call found within. Bonus points if I can specify a time/date range.
I don't want to manage yet another server or metrics repository in order to hold all of this call data, so some of the larger (and pricier) tools mentioned before are out for me.
I've contacted the author of sngrep and though the packet capture code is already there, he reasonably doesn't want to turn sngrep into sipawk or sipsed.
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