[SR-Users] siptrace: methods blacklist modparam

[Federico Cabiddu]

Hi Nuno,
I think it's a good and useful addition, I had a quick look on the PR and
it looks good, but I'll have a deeper look as soon as possible.

Cheers,

Federico

On Thu, Jun 25, 2020 at 11:30 AM Nuno Ferreira <nferreira at fuze.com> wrote:

> Hello,
>
> We are a heavy Homer/Hepic (tks QXIP team) users and on our setup, there
> are some SIP methods we don’t want to get into the database or send to the
> capture server because there’s no value-added for call troubleshooting
> purposes (OPTIONS, KDMQ, HTTP (from JSONRPC)…)
>
> Typically we achieve the message filtering using siptrace in “manual” mode
> and control what to send from the script. This works fine for some
> situations, but there are a few we need to have the automatic mode on:
>
>    -
>
>    topos enabled: using manual mode we don’t get the “wire” version of
>    the signaling
>    -
>
>    TCP connections: there are a few situations where the destination port
>    is traced with 0 - I believe this is due to the fact the TCP socket not
>    established when the message is collected
>
>
> There are other technics to filter like using a HEP relay proxy dropping
> unwanted traffic, but having a native kamailio functionality would make
> things much easier. With that in mind, I’ve created a PR (#2374
> <https://github.com/kamailio/kamailio/pull/2374>) that allows to
> blacklist methods we don’t want to send to the capture server when using
> automatic trace mode. I believe this is a very helpful change for the
> community as well.
>
> To block SIP OPTIONS and KDMQ we just need to declare a new modparam:
>
> modparam("siptrace", "trace_on", 1)
>
> modparam("siptrace", "methods_blacklist_auto", 16896)
>
> Let me know what you think about it.
>
> Nuno
>
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