[OpenSIPS-Users] Validate dialog confusion

[Bogdan-Andrei Iancu]

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 Developer
http://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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