On 2/26/08, Helmut Wolf <HelmutWolf1 at gmx.de> wrote:
> Hi Benny,
>
> I've got a problem with stateful_proxy: A Cancel request sometimes causes a software abortion because assertion failed:
> ../src/pjsip/sip_util.c:556: pjsip_endpt_create_cancel: Assertion `req_tdata->msg->type == PJSIP_REQUEST_MSG &&
> req_tdata->msg->line.req.method.id == PJSIP_INVITE_METHOD' failed.
>
> The call flow for this example was:
>
> UA pjsip stateful_proxy SIP Server
> -- -------------------- ----------
>
> Invite ->
> Invite ->
> <- trying
> <- trying
> <- 407
> ACK ->
> <- 407
> CANCEL ->
> <- 200 Ok
>
> --> Assertion failed
>
> The assertion failed because in stateful_proxy.c: proxy_on_rx_request: pjsip_endpt_create_cancel: uas_data->uac_tsx->last_tx the ACK
> message is saved, not the INVITE message.
>
I think there's a bug in the code, that we shouldn't create CANCEL if
the UAC INVITE transaction has been completed. I've updated the code
in stateful_proxy.c:272 to this:
if (uas_data->uac_tsx && uas_data->uac_tsx->status_code < 200) {
.. create and send CANCEL
cheers,
-benny
