[OpenSIPS-Users] how to cancel an INVITE before the callee receive it?

[merlin.li at tsingch.com]

Hi Chircu,

I got an idea, and tested it, but the result confuse me. 
In the CANCEL processing block, i use  set_dlg_flag("1") to set a dialog flag,

if (is_method("CANCEL"))   # in the route block
        {
                if (t_check_trans()){
                        if(!is_dlg_flag_set("1")){
                            set_dlg_flag("1");
                            t_relay();
                            exit;
                        }
}
}

and in the while loop:
while( !lookup("location","m") ){
                            if(is_dlg_flag_set("1")){
                              t_reply("404","cancel the request!");
                              exit;
                             }
                .....
}

Sometimes , it works well, but sometimes, the CANCEL process is not executed until the loop finished.
What i said is i got two result, and i don't know why.
result 1:
when opensips received the CANCEL request , the dialog flag is set, then break the while loop.

result 2:
Caller issue a CANCEL request, but opensips didn't entering the CANCEL process until the while loop is finished.




merlin.li at tsingch.com

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