[Users] Using uac_replace_from to munge username between ser and Asterisk?

Barry Flanagan barryf-lists at flanagan.ie
Mon Jan 30 19:40:40 CET 2006

Bogdan-Andrei Iancu wrote:
> Hi Barry,
> I've seen some time ago a similar post - a suggested solution was to 
> enable multidomain support into Asterisk in order to avoid user 
> overlapping.

Apparently it is not possible yet in Asterisk. Answer from the Asterisk 

> For authentication, we only look at
> 1) Whether the domain is a domain we host
> 2) If the user (regardless of domain) is a user we know
> The user namespace is common for all hosted domains, so you can't have barry at domain1 *and* barry at domain2. 

So, the only way around it that I can see is to somehow have OpenSER 
change the username to username_domain so that each will be unique.

It looks like uac_from_replace should handle this. I have tried it, and 
I can see that Asterisk does in fact get user_domain at domain in the first 
invite, but thereafter for some reason OpenSER changes it to just 
_ at domain for subsequent requests.



> regards,
> bogdan
> Barry Flanagan wrote:
>> Hi,
>> I am trying to get a multi-domain setup working between OpenSER and 
>> Asterisk (PSTN gateway and Voicemail).
>> It appears that I need to munge the username before it goes to 
>> Asterisk so that it includes the domain element, otherwise there is 
>> clashing in the username namespace on Asterisk.
>> It looks like I should be able to use uac_replace_from to change the 
>> From URI from user at domain.com to user_domain at domain.com so that then I 
>> can set up the users in Asterisk as [user_domain]
>> Does this sound sane, and could someone tell me how I can accomplish 
>> this in OpenSER? I have tried a few things but they all end up as bad 
>> headers.
>> Thanks in advance.


-Barry Flanagan

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