[Serusers] avpops - how to fake a registration

[Greger V. Teigre]

So you have tested using avp_pushto() and it doesn't work with stateless 
replies? That's one of the things I have never tested. I'm not sure how 
sl_send_reply() builds a message, but it is probably likely that it copies 
fields and thus ignores (or changes) Contact.  BTW, have you tried 
responding to the REGISTER using t_relay() ?  I have no clue what will 
happen, certainly not a 200 OK, maybe an error...  If not,  maybe you'll get 
a message you can tweak with avp_*?!

But to your "real" problem: Why not create a new table called 697_location 
and use save("697_location"); ?  Or maybe even better: you can create a 
bypass when handling INVITEs and not authenticate if the caller is 697 and 
just rewrite the ruri directly to your voiceprompt.
g-)

Java Rockx wrote:
> Greg,
>
> I wish it were that easy. If you receive a REGISTER message, it does
> contain the <Contact> header.
>
> But by doing the following a 200 OK is retured __without__ a <Contact>
> header and therefore the SIP client must ignore the response. So I
> really need to find a way to "copy" the Contact header from the
> REGISTER message to the 200OK response.
>
> if (method=="REGISTER") {
>     sl_send_reply("200", "OK");
>     break;
> };
>
> FYI, if you're wondering why such a silly thing is needed it is
> because we use a UTstarcom iAN-02EX ATA which is two phone ports on
> the back. We only configure Line 1 and in the past this caused
> customers problems because they assume the Line 1 is the "left" port
> and Line 2 is the "right" port.
>
> So the just plug in to the left port (Line 2) and realize the get no
> dial tone. Then they call for support and blah blah blah.
>
> So we now configure Line 2 as extension 697. If they attempt to dial
> __any__ number from Line 2 we route them to the Asterisk server and
> play a "please reconfigure your ATA" message to prevent a support
> call.
>
> The only problem is that in order for the ATA to give dial tone it
> must successfully REGISTER.
>
> And from a SIP proxy point of view, there is no reason to ever fully
> process these REGISTER messages.
>
> Regards,
> Paul
>
> On Apr 2, 2005 3:50 AM, Greger V. Teigre <greger at teigre.com> wrote:
>> No guarantees that this works, just a quick attempt:
>> You already have a Contact header in the reply (I believe), you just
>> need to manipulate it. (If not, you can use
>> avp_pushto("Contact/reply","avpair") to create one)
>>
>> Use subst to get:
>> Contact: <sip:username at ipaddress:port>;q=0.00;expires=3600.
>>
>> Here is a regex I put together as an example:
>> /^Contact:(.*)sip:([a-zA-Z0-9_-]+)@([0-9.]+):([0-9]*)(.*)$/Contact:\1sip:\2@\3:\4>;q=0.00;expires=3600/
>>
>> Good luck! ;-)
>> g-)
>>
>> Java Rockx wrote:
>>> Hi All.
>>>
>>> I'm using ser-0.9.1 with auth_db enabled for user registration
>>> stuff.
>>>
>>> I need to fake a REGISTRATION under certain circumstances. What I
>>> want to do is sl_send_reply("200", "OK") when I get a REGISTER
>>> message from user 697.
>>>
>>> I don't want to actually call the save("location") method because I
>>> do not want to store 697 in the database or in ser's cache.
>>>
>>> So how can I sl_send_reply() and include the <Contact> header which
>>> the save() function would normally insert in to the response?
>>>
>>> I'm thinking I could use AVPOPs somehow, but I'm not sure.
>>>
>>> Can this be done?
>>>
>>> Regards,
>>> Paul
>>>
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