[SR-Users] HEP siptrace HEPv3 truncated and ignored by heplify-server (Homer 7)

[Daniel-Constantin Mierla]

Hello,

thanks for updating here, good to know large packets were truncated by
heplify.

Cheers,
Daniel

On 23.07.20 16:18, José Lopes wrote:
> Hello all,
>
> I figured it out.
>
> The heplify-server truncates the packets above 8192 bytes, I changed
> the code of heplify-server and it is working.
> This question is not related to kamailio, so I will open an issue on
> heplify-server.
>
> Thanks.
>
>
> On Wed, Jul 22, 2020 at 8:06 PM José Lopes <jose.lopes at itcenter.com
> <mailto:jose.lopes at itcenter.com>> wrote:
>
>     Hello all,
>
>     I am using the siptrace module on Kamailio 5.3.5 and I am trying
>     to monitor the SIP over websockets traffic with Homer 7.8.1
>     (heplify-server).
>
>     I notice a strange behavior, some packets are not presented on Homer.
>     I checked heplify-server and i notice the next warning:
>     heplify-server: 2020/07/22 18:41:09.425513 decoder.go:103: WARN
>     HEP packet length is 8192 but should be 11663
>
>     So I think the packets are truncated by 8192 (packet size), so
>     they are ignored by heplify-server.
>
>     I have done a tcpdump on the Homer machine and have the next
>     output, where I can see some packets with size greater than 8192.
>
>     19:58:29.788927 IP X.X.X.X.6666 > Y.Y.Y.Y.9060: UDP, bad length
>     11658 > 1472
>     19:58:29.793539 IP X.X.X.X.6666 > Y.Y.Y.Y.9060: UDP, length 626
>     19:58:29.810733 IP X.X.X.X.6666 > Y.Y.Y.Y.9060: UDP, length 579
>     19:58:29.811121 IP X.X.X.X.6666 > Y.Y.Y.Y.9060: UDP, length 579
>     19:58:29.838824 IP X.X.X.X.6666 > Y.Y.Y.Y.9060: UDP, bad length
>     11953 > 1472
>     19:58:29.852286 IP X.X.X.X.6666 > Y.Y.Y.Y.9060: UDP, length 473
>     19:58:29.865388 IP X.X.X.X.6666 > Y.Y.Y.Y.9060: UDP, bad length
>     3521 > 1472
>     19:58:29.875311 IP X.X.X.X.6666 > Y.Y.Y.Y.9060: UDP, length 562
>
>     Can you guide me to identify where the packets are truncated?
>
>
>     Os melhores cumprimentos / Best regards,
>
>     *José Lopes*
>     Research and Development Technician
>
>     Phone: +351 256 370 980
>     Email: jose.lopes at itcenter.com <mailto:jose.lopes at itcenter.com>
>
>
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-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Funding: https://www.paypal.me/dcmierla

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