[OpenSER-Users] automatically generated aliases with usrloc and ldap

[Daniel-Constantin Mierla]

Hello,

On 03/26/08 22:19, Lukasz Stelmach wrote:
> Greetings All.
>
> I have managed to set up OpenSER with LDAP authentication. Now I would
> like it to create memory cached aliases each time a user registers. I
> do not wan to use any persistent storage because I have it already it
> is my LDAP directory. However, I would like OpenSER to cache those
> aliases as doing ldap lookup for every message does not look too apealing
> to me.
>
> Let me explain how I see it:
>
> if (is_method("REGISTER"))
> {
>   if(is_present_hf("Proxy-Authorization"))
>   {
>     if (!ldap_search("ldap://sipaccounts/ou=dept,o=TELMARK,c=PL?uid,mail,uidNumber,userPassword?one?(uid=$f))
>       { #error handling }
>
>     ldap_result("uid/$avp(s:username)");
>     ldap_result("userPassword/$avp(s:password)");
>     ldap_result("mail/$avp(s:longalias)");
>     ldap_result("uidNumber/$avp(s:numalias)");
>
>     if(pv_proxy_authorize("telmark"))
>     {
>       proxy_challenge("telmark", "1");
>       exit;
>     }
>   } else {
>     proxy_challenge("telmark", "1");
>     exit;
>   }
>
>   if(!save("location"))
>     sl_reply_error();
>
>   # And here the big thing!
> }
>
> What to do to make
>
>   save("aliases");
>
> (called twice) save uidNumber and mail (without @domain, these are
> transformations, I know) as aliases in usrloc?
>   
save() function is exported by registrar module and it saves the contact 
address from REGISTER message along with several other attributes to 
usrloc, in a table mentioned by the parameter. There is no clean 
solution for what you want with registrar/usrloc modules now. AFAIK ldap 
is very fast for search operations, but, of course, there could be other 
delays from the network.

However, you can try a hack:
- after save() replace the contact address and other headers (e.g., To) 
with what you need using text/header operations exported by textops module
- send the REGISTER to server itself
- don't authenticate REGISTERs coming via loopback (from server iself)
- use save_noreply() to save to aliases table

Should work.

Cheers,
Daniel


>   
>
> PS.  Please cc answers I am not a subscriber.
>