Hi Daniel

No, replies are not dropped.

I looked into source code, particularly tmx_mod.c::t_cancel_callid() function.
It alter the global pointer T (pointing to the transaction currently processed), but do not restore original value at the end:
- at the beginning of t_cancel_callid(), T is NULL
- then t_lookup_callid() make it point to the transaction we want to cancel
- and the pointer is not cleanup before exiting t_cancel_callid

Here is a patch that fix this issue (it may not be the correct way to do it)

Regards,
Guillaume

On 20/11/2013 22:57, Daniel-Constantin Mierla wrote:

Hello,

are you dropping replies? I don't see the 'SIP/2.0 487 Request Terminated' being sent to caller, it looks ok and has two Via headers.

Cheers,
Daniel

On 11/20/13 4:06 PM, Guillaume Bour wrote:
On 20/11/2013 12:01, Daniel-Constantin Mierla wrote:

Hello,

On 11/20/13 11:50 AM, Guillaume Bour wrote:

Hi All

We wan't to prevent our users to make more than one call at time, so we choose to disconnect the previous call.
When the previous call is established, we use dlg_bye(), and its ok.
But when it is in early state, we use t_cancel_callid() to cancel its INVITE transaction.

We face 2 issues:
    1) we use local-request event route to account calls on timeout. Sometimes this route is called for the cancelled call (after default timeout of 1 hour)

what is in the local-request in this case? Is it a BYE?

    2) t_cancel_callid() cancel previous call, but also make current dialog disappear: call is still ongoing and we can answer and talk to each other, but the dialog does not appear in 'kamctl stats dialog' and 'kamctl mi dlg_list' commands

Is there a known limitation, or do we misuse t_cancel_callid() ?

Can you send the log with debug=3 in kamailio.cfg? It will help to see what happens. Otherwise, if the call id is different for current dialog, it should not happen. The ngrep output in this situation (for both first and second invite) will help.

Cheers,
Daniel

Hi Daniel,

local-request is triggered by a BYE
I have attached sample log and trace

There is some kind of dialogs mixing. Here is the 1st call dialog as reported by "kamctl mi dlg_list" before and after the 2d call is answered:

# kamctl mi dlg_list
dialog:: hash=2790:3231
        state:: 2
        ref_count:: 1
        timestart:: 0
        timeout:: 0
        callid:: GoXhk8GfkIEEqFyFNcySEjSOOpVKg4Uq
        from_uri:: sip:15909901@staging.voip
        from_tag:: swYh88AkicGbSHpK.D1z7uo3EX9Q-.AZ
        caller_contact:: sip:37984520-gch2kindtioq8@10.0.1.10:5060;transport=udp
        caller_cseq:: 24899
        caller_route_set::
        caller_bind_addr:: udp:10.0.1.10:5060
        callee_bind_addr::
        to_uri:: sip:+3360000011@staging.voip
        to_tag::
        callee_contact::
        callee_cseq::
        callee_route_set::

# kamctl mi dlg_list
dialog:: hash=2790:3231
        state:: 3
        ref_count:: 2
        timestart:: 1384952191
        timeout:: 20242152
        callid:: GoXhk8GfkIEEqFyFNcySEjSOOpVKg4Uq
        from_uri:: sip:15909901@staging.voip
        from_tag:: swYh88AkicGbSHpK.D1z7uo3EX9Q-.AZ
        caller_contact:: sip:37984520-gch2kindtioq8@10.0.1.20:5060;transport=udp
        caller_cseq:: 24899
        caller_route_set::
        caller_bind_addr:: udp:10.0.1.10:5060
        callee_bind_addr:: udp:10.0.1.10:5060
        to_uri:: sip:+3360000011@staging.voip
        to_tag:: as6c8b935a
        callee_contact:: sip:+3360000022@10.0.1.11:5060
        callee_cseq::
        callee_route_set::
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