[Serusers] Anonymization/uac-module questions

[Andreas Granig]

Hi all,

First of all two common anonymization questions:

Is it save for anonymization to alter the Contact-Header in SER if 
record_route() is used to strip the username/IP? If not, how do you 
accomplish this correctly?

And is there a way to modify the SDP body to change the o-Field to 
change/remove the IP of the owner/creator?

Then an uac issue:

The uac module (backported to ser-0.9 with "MANUAL RESTORE" mode) works 
well for me in this scenario:

The group "clir" indicates anonymization, and the config looks like this:

modparam("uac", "from_restore_mode", 2)
route {
   # ...
   if(is_user_in("From", "clir")) {
     setflag(7);
     uac_replace_from("Anonymous", "sip:anonymous at my.domain");
   }
   t_on_reply("1");
   t_relay();
}

onreply_route[1] {
   if(isflagset(7))
     uac_restore_from();
}

When A calls B and A is in group "clir", the From-Header sent to B is 
anonymized, and responses to A are restored correctly.

But when B hangs up, the UAC of B (Cisco-ATA186 or Mediatrix 2102) 
changes From and To in the BYE message, so A receives the anonymized 
From-Header as To-Header.

This is because uac_restore_from() only restores the From-Header (as the 
name of the function says ;o) ), not the To-Header if there is a 
vsf-Parameter available. This isn't correct behaviour, is it?

Also the Cisco-ATA strips off the vsf-Parameter in the BYE-Message so it 
isn't available anyhow, but this seems to be a Cisco-Bug!?


Any Comments/Ideas?

Andy