[Serusers] Arbitrarily altering the "Contact:" field

[Klaus Darilion]

Hi Tavis!

I did similar things when a patched ser to work as outbound proxy (e.g. 
like a jasomi peer point). It's a bad hack but it works fine with me. 
The regexps are attached (to avoid line breaks in the email).

These regexp works following:
user at domain ==> user_domain at proxyIPaddress

in the reply_route, it works the other way round
user_domain at proxyIPaddress ==> user at domain

To use it as outbound proxy, I also had to modify the save() function to 
use user_domain at proxyIPaddress as AOR instead of the real AOR.

regards,
klaus



reticent wrote:

> I've got a situation where i need to replicate registrations to an 
> outside proxy, a simple replicate wont work because i need the 
> registration on the outside proxy to reference the SER proxy and not the 
> client directly.
> 
> The one requirement is that i know (in a scripting context) what the 
> username of the registration is so i can construct a Contact that 
> contains it.
> 
> The only function i've found that could do this is the subst(///) 
> function in the textops.so module, however its acting very strangely.
> 
> Ex.
> 
> subst('/^Contact:.*sip:([0-9]+)@.*$/Contact: <sip:\1@!OUTSIDE_PROXY!>/');
> 
> Seems to match properly, but inspecting the packet as its routed out 
> (using ngrep) shows the following contact field
> 
> "<sip:200010001000@!OUTSIDE_PROXY!>sip:200010001000@!ORIGINAL_IP!:5070."
> 
> My understanding is that "sip:200010001000@!ORIGINAL_IP!:5070" should 
> have been replaced with <sip:200010001000@!OUTSIDE_PROXY!> instead of 
> being prepended.
> 
> Perhaps there is a module that provides a function that would allow me 
> to manipulate the contact more easily (i'm aware that the regex in the 
> subst in inadequate and would not match the full range of RFC3261 valid 
> Contact strings, i'm just testing right now)
> 
> Would anyone be able to offer any advice?
> 
> tavis
> 
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> 

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