Iñaki Baz Castillo wrote:
> El Miércoles, 4 de Marzo de 2009, alexander merkulov escribió:
>> thats work for invite nice, but not work fro cancel
>> even this (very simple form) not change cancel
>>
>> if (method == "BYE" || method == "CANCEL") {
>> # xlog("bye\n");a
>> xlog("L_INFO", "CANCEL - M=$rm RURI=$ru F=$fu T=$tu
>> IP=$si ID=$ci\n");
>> if(t_check_trans()){
>> xlog("triing to rewrite");
>> if ( subst('/192/aaa/ig') ) {};
>> t_relay();
>> exit;
>> }else{
>> xlog("no trans");
>> exit;
>> }
>
> CANCEL is hop-by-hop. This means that when a proxy receives a CANCEL it
> *doesn't* forward it. Instead it "eats" that CANCEL and *generates* a new
> one. This is how SIP defines the behaviour of a CANCEL.
>
> But again I ask you, why do you need rewritting the To header? It shouldn't
> be
> required, neither in a CANCEL. In fact when a UAS receives a CANCEL it just
> should inspect the Via "branch" parameter to match it against a current
> INVITE server transaction.
>
>
Looking at the change he is attempting to make, it appears that he is
trying to force Kamailio to act more like an SBC doing NAT transversal
through a B2BUA scenario, than a proxy.
Tim
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