Hi,

Thanks for the reply,

When I was testing, I found the below log.

Log  ====   DEBUG: sl [sl_funcs.c:462]: sl_filter_ACK(): SL local ACK found -> dropping it!

On Wed, Oct 25, 2023 at 12:44 PM Henning Westerholt <hw@gilawa.com> wrote:

Hello,

the sanity module can be used for request and reply checks, as e.g. visible in the default configuration.
It might be a bit too short documented in the module readme.

Cheers,

Henning Westerholt

--
Henning Westerholt - https://skalatan.de/blog/
Kamailio services - https://gilawa.com



> -----Original Message-----
> From: James Browne via sr-users <sr-users@lists.kamailio.org>
> Sent: Dienstag, 24. Oktober 2023 17:55
> To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
> Cc: satyaprakash ch <chiramchetty.satyaprakash@gmail.com>; James Browne
> <james@frideo.com>
> Subject: [SR-Users] Re: Inquiry Regarding Kamailio Behavior and Drop
> Requests
>
> I expect that it's not related, because the documentation is clear that the
> function relates to requests, not responses.
>
> https://kamailio.org/docs/modules/5.5.x/modules/sanity.html#sanity.f.sanit
> y_check
> - 4.1.  sanity_check([msg_checks [, uri_checks]])
> - This function makes a row of sanity checks over the given SIP request...
>
> It seems simple: check the logs from the xlog command and see what you find.
> If it's not clear enough, add the Call-ID to the log message, and then also
> capture (tshark/tcpdump) traffic for subsequent analysis.
>
> James
>
> On Mon, 16 Oct 2023 at 16:52, satyaprakash ch via sr-users <sr-
> users@lists.kamailio.org> wrote:
> >
> > Hi,
> >
> > We possess a code within Kamailio, which specifically handles malformed SIP
> responses. Below is the code snippet:
> >
> > reply_route
> > Copy code
> > if(!sanity_check("17604", "6")) {
> > xlog("Malformed SIP response from $si:$sp\n"); drop;
> >
> > Additionally, we have Kamailio drop request statistics as follows:
> >
> > Command: kamctl stats | grep core:drop_requests Output of the command:
> > core:drop_requests = 5
> >
> > My queries are:
> >
> > 1. Is the aforementioned "reply_route" related to the drop requests we are
> experiencing?
> > 2. If it is not related, what could be the cause of the drop requests?
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