[OpenSIPS-Users] Validate dialog confusion

[John Nash]

OK got it. I also have a situation where I receive BYE from callee which
has "To" tag but no route header. As per default script this request should
not be allowed to go further. Would fix_route_dialog(); work or I should
just relay it?

On Wed, Dec 31, 2014 at 1:37 AM, Bogdan-Andrei Iancu <bogdan at opensips.org>
wrote:

>  Hi John,
>
> 1) if the request does not match any dialog it will go on the "else"
> branch where it simply logs the "valid request" - this is a simple example,
> but the idea is that without dialog state you cannot check if valid or not;
> and you maybe do not create dialogs for all your calls and maybe not all
> your sequential request are part of a INVITE dialog (you may have
> re-SUBSCRIBE or NOTIFYs)
>
> 2) the function just fixes, you need to send it out as usual via the
> t_relay(),
>
> Regards,
>
> Bogdan-Andrei Iancu
> OpenSIPS Founder and Developerhttp://www.opensips-solutions.com
>
> On 30.12.2014 12:16, John Nash wrote:
>
>  I was looking at usage of validate_dialog() and saw the following
> snippet from module documentation page. If you check the else part... as
> per my understanding if a dialog is not found ($DLG_status) will be NULL)
> it will go to else part which indicates a message has To tag but dialog not
> found. How can it be a valid in-dialog request.
>
>     if (has_totag()) {
>         loose_route();
>         if ($DLG_status!=NULL && !validate_dialog() ) {
>             xlog(" in-dialog bogus request \n");
>         } else {
>             xlog(" in-dialog valid request - $DLG_dir !\n");
>         }
>     }
>
> Also there is one more code
>
>    if (has_totag()) {
>         loose_route();
>         if ($DLG_status!=NULL)
>             if (!validate_dialog())
>                 fix_route_dialog();
>     }
>
>
>  After calling fix_route_dialog() do I need to just relay the message? I
> mean this function will "fix" the message and send?....I was trying to look
> for some security check where someone can inject a route header and a to
> tag (Bogus of course) to reach to my gateways through my proxy.
>
>
>
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>
>
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