New subject: [Serusers] prevent INVITE without REGISTERing

12 Jul 2006

Thanks Miklos,

I think this is just what I'm looking for.
But I get some errors for this line:
if ((src_ip != @ruri.host) || (src_port != @ruri.port)) {

 0(30074) parse error (175,16-17): syntax error
 0(30074) parse error (175,16-17): ip address or hostname expected
 0(30074) parse error (175,16-17): bad command
 0(30074) parse error (175,21-22): bad command
 0(30074) parse error (175,21-22): bad command
 0(30074) parse error (175,26-27): bad command
 0(30074) parse error (175,26-27): bad command
 0(30074) parse error (175,28-30): bad command
 0(30074) parse error (175,31-32): bad command
 0(30074) parse error (175,32-40): bad command
 0(30074) parse error (175,41-43): bad command
 0(30074) parse error (175,44-45): bad command
 0(30074) parse error (175,49-50): bad command
 0(30074) parse error (175,49-50): bad command
 0(30074) parse error (175,54-55): bad command
 0(30074) parse error (175,54-55): bad command
 0(30074) parse error (175,55-56): bad command
 0(30074) parse error (175,57-58): bad command

Any idea why ?

Thanks,
ilker

-----Original Message-----
From: Miklos Tirpak [mailto:miklos@iptel.org]
Sent: Wednesday, July 12, 2006 11:58 AM
To: İlker Aktuna (Koç.net)
Cc: serusers(a)iptel.org
Subject: Re: [Serusers] prevent INVITE without REGISTERing

Hi Ilker,

just my first idea, not tested:

1. lookup the From HF

if (!lookup_user("From")) {
        # reject the INVITE
        ...
}

2. save original To UID and Request URI

$orig_to_uid = $tu.uid;
$orig_req_uri = @ruri;

3. set To UID -- registrar module will use this in the lookup

$tu.uid = $fu.uid;

4. lookup From HF and compare the source address of the INVITE with the source address of
the REGISTER message

if (lookup("location")) {
        if ((src_ip != @ruri.host) || (src_port != @ruri.port)) {
                # reject the INVITE
                ...
        }
        # restore original To UID and Request URI
        $tu.uid = $orig_to_uid;
        attr2uri("$orig_req_uri");
} else {
        # reject the INVITE
        ...
}

Note, that the above solution is a bit ugly, you can get into troubles when the user
registers multiple contact addresses. It is better to disable branches (see
append_branches parameter in registrar module), but you loose some functionality.

Regards,
Miklos

İlker Aktuna (Koç.net) wrote:
...

 Hi everyone,

 I am still trying to find a solution to this problem. (but couldn't
 find
 yet)
 Victor was trying to help me but I think he's not able to reply these days.

 Is there any idea to achieve what I need.

 Thanks,
 ilker

 ----------------------------------------------------------------------
 --
 *From:* serusers-bounces(a)lists.iptel.org
 [mailto:serusers-bounces@lists.iptel.org] *On Behalf Of *İlker Aktuna
 (Koç.net)
 *Sent:* Tuesday, July 11, 2006 1:41 PM
 *To:* Victor Stanescu
 *Cc:* serusers(a)iptel.org
 *Subject:* RE: [Serusers] prevent INVITE without REGISTERing

 Hi,

 What if my proxy does not handle authenticating INVITE messages ?

 In that case I think the best way is to lookup location table for the
 source URI.
 If the source URI location matches the location in that table then we
 must permit INVITE message.
 How can I configure this ?

 Thanks,
 ilker

 -----Original Message-----
 From: serusers-bounces(a)lists.iptel.org
 [mailto:serusers-bounces@lists.iptel.org] On Behalf Of Victor Stanescu
 Sent: Monday, July 10, 2006 1:49 PM
 Cc: serusers(a)iptel.org
 Subject: Re: [Serusers] prevent INVITE without REGISTERing

 Please read "domain" instead of "gtstelecom.ro":
 www_authorize("domain",
 "subscriber") and proxy_authorize("domain", "subscriber"),
otherwise
 the code fragment will not be correct. I forgot to replace with a generic name.

 Victor Stanescu wrote:
  I think it is easier to force him to authenticate
the INVITE. If he  is  > able to authenticate the INVITE, why do you care if he
is
 registered  > or not?

 if (method=="REGISTER") {
     if(!src_ip=="other") {
         if (!www_authorize("gtstelecom.ro", "subscriber")) {
             www_challenge("domain", "0");
             break;
         };
         save("location");
         log("Replicating REGISTER\n");
         t_replicate("other", "5060");
     } else {
         save("location");
     };
     break;
 } else {
     # this is an INVITE
     if (!proxy_authorize("gtstelecom.ro", "subscriber")) {
         proxy_challenge("domain", "1");
         break;
     };
     # route the call
     ...
 };

 İlker Aktuna (Koç.net) wrote:
>
> Hi all,
>
> Is it possible to prevent any user calling without registering ?  What 
>> is the best way to do this ?
 > I guess I'll have to check if the source
URI exists in location table.
> What is the easiest way to do this ?
>
> If there is a more robust way to do it, please suggest...
>
> Thanks,
> ilker
>
> 

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