Re: How to detect originating and terminating?

Hello,

I usually look at where the call is originating from, that tells me where
it’s going. If it’s coming from a user then it’s originating. Later on, if
it’s going to a user it’s terminating.

Regards,

David Villasmil
email: [email protected]



On Sat, Jun 7, 2025 at 4:20 PM James Morrison via sr-users <
[email protected]> wrote:

> I'm trying to find a way to differentiate between originating and
> terminating legs. Currently in kex module, in core_stats.c I'm adding new
> counters for more response codes, I want to have two sets of counters, one
> for originating and one for terminating.
>
> In ims_getters.c file, I found a function called cscf_has_originating,
> which by description "Finds if the message contains the orig parameter in
> the first Route header"
>
> I'm calling it like the following:
> static int km_cb_rpl_stats_by_method(struct sip_msg *msg, unsigned int
> flags, void *param)
> {
>     int  originating = cscf_has_originating(msg);
> ....
>
> However it always returns CSCF_RETURN_FALSE (or -1).
>
> I added a log message and increased log level for core module:
> DEBUG: <core> [ims_getters.c:561]: cscf_has_originating(): I_originating:
> Header Route not found
> ERROR: kex [core_stats.c:424]: km_cb_rpl_stats_by_method(): In kex module
> received rpls, the return value of cscf_has_originating is: -1
>
> That's because cscf_has_originating function is calling parse_headers
> function, trying to get msg->route
> but that route property is not set correctly in the previous step:
>         if(parse_headers(msg, HDR_ROUTE_F, 0) < 0) {
>                 LM_DBG("I_originating: error parsing headers\n");
>                 return CSCF_RETURN_FALSE;
>         }
> so it returns -1 after checking msg->route value.
>
> Do you know any alternative solution? or do you know why msg->route value
> is 0 or NULL?
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