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Andy,<br>
I'm still not sure what you mean when referring to the "username" and
I'm not sure what you are trying to accomplish. If you are referring to
the Request-URI, you need to lookup based on your current Request-URI
(whatever that is at the point in your ser.cfg you want to change
RURI). However, if you are looking at getting a correct caller-id, you
should rather use Remote-Party-Id.<br>
The RURI should be the callee, so setting the ruri to the caller
doesn't make sense to me. Maybe you can tell what you are trying to
accomplish?<br>
g-)<br>
<br>
Andy Thomas wrote:
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Greger,<o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Im already
doing this for calls coming
into my SER installation.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">However I
want to do it the other way
around, i.e. from SER/UA to PSTN<o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Therefore I
want to rewrite the username if
the outgoing INVITE message to be the alias, not the location, when
sending to
the PSTN.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Andy<o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"><o:p> </o:p></span></font></p>
<div>
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<hr tabindex="-1" align="center" size="2" width="100%"></span></font></div>
<p class="MsoNormal"><b><font color="black" face="Tahoma" size="2"><span
style="font-size: 10pt; font-family: Tahoma; color: windowtext; font-weight: bold;">From:</span></font></b><font
color="black" face="Tahoma" size="2"><span
style="font-size: 10pt; font-family: Tahoma; color: windowtext;">
Greger V. Teigre [<a class="moz-txt-link-freetext" href="mailto:greger@teigre.com">mailto:greger@teigre.com</a>] <br>
<b><span style="font-weight: bold;">Sent:</span></b> 12 June 2006
09:33<br>
<b><span style="font-weight: bold;">To:</span></b> Andy Thomas<br>
<b><span style="font-weight: bold;">Cc:</span></b> <st1:PersonName
w:st="on"><a class="moz-txt-link-abbreviated" href="mailto:serusers@lists.iptel.org">serusers@lists.iptel.org</a></st1:PersonName><br>
<b><span style="font-weight: bold;">Subject:</span></b> Re:
[Serusers] rewriting the
outgoing URI to its alias</span></font><font color="black"><span
style="color: windowtext;"><o:p></o:p></span></font></p>
</div>
<p class="MsoNormal"><font color="black" face="Times New Roman"
size="3"><span style="font-size: 12pt;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font color="black" face="Times New Roman"
size="3"><span style="font-size: 12pt;">I see a lot of confusion on
the different user related
ids in SIP. Let me try to explain (and answer your question, Andy, at
the end
of the post...)<br>
<br>
Let's start at the user agent(UA) side:<br>
--------------------<br>
AOR: Address of record is the <a href="mailto:sip:myuser@domain.com">sip:myuser@domain.com</a>
address that you are known as, just like your email address. Many user
agents don't ask for AOR, but builds it from other parameters you need
to set<br>
Username: The username is normally the user (before @) of AOR)<br>
Realm: Often the domain portion of the AOR, thus AOR =
sip:username@realm<br>
Friendly name/displayname: "My name"<br>
<br>
Out of this info, the From header is constructed:<br>
From: "My name" <sip:username@realm><br>
---<br>
Entirely separate (but sometimes confused in user agents):<br>
Authentication username: The user used for authentication<br>
Authentication realm: The realm to authenticate within<br>
Very often the authentication realm is implicitly assumed to be the
same as the
AOR realm<br>
---<br>
Then, the user agent will create the Contact header. The Contact header
should
be the public contact address of your current location. Thus: Contact:
sip:username@mypublicip:5060<br>
If the user agent is behind a NAT, the mypublicip will be a private
address.<br>
---<br>
A sidenote: Unless registration server is explicitly specified, the
realm in
the AOR will be used for looking up the SIP registration server using
DNS SRV
or A lookups. You should avoid putting the FQDN of your SIP server in
the
realm. <br>
Also, you may in some user agents specify outbound proxy. This is the
proxy
where the user agent will send INVITEs (and other outbound messages).<br>
-------------------<br>
<br>
And on the SER side:<br>
-------------------<br>
Authentication user/realm are used to do Digest authentication, but are
then
forgotten (i.e. not stored).<br>
The AOR is registered in the location table, together with the Contact
header,
as well as the source ip and port (if different from Contact). The
fix_nated_register() function handles this setting of the so-called
received
parameter.<br>
<br>
So, to the routing: <br>
- Messages that need to be routed (i.e. do not have Route headers) will
have a
Request URI; the first line and the part after the message type: INVITE
<a href="mailto:sip:username@domain.com">sip:username@domain.com</a><br>
- It is by changing this request URI, you do routing. The t_relay()
command uses the URI to forward the message correctly<br>
- Before forwarding to a user agent, you want the request uri to be the
same as
the stored Contact header for the AOR you are looking up. If not, the
user
agent may reply with a 404 User not found<br>
- The From header is NOT used for routing, and for backwards RFC
compatibility,
you should not change the From header as some UAs will use the content
of the
>From header to match a dialog (however, if your UAs from experience
still work,
there should not be a problem doing it, it's just not RFC-compliant and
may pop
up and kick your butt later ;-)<br>
- The AOR in location table is used for looking up incoming messages if
you can
find a direct match between the Request-URI in the incoming message and
the
stored AOR. If not, you can use the aliases table (and
lookup("aliases")) to match the Request-URI with something in the
aliases table, that again will map to the AOR in the location table<br>
---<br>
So keeping this (fairly simple) concept in focus: Routing (regardless
of LCR,
avps or whatever) should focus on finding the correct Request-URI
before you
call t_relay().<br>
<br>
BUT, there are ways of "messing" up this...<br>
---<br>
- There are several commands in SER you can use to override the
Request-URI
(forward_*). They should be avoided, unless you have a valid reason for
having
a Request-URI in the message you are forwarding that is NOT resolvable
(either
IP address or DNS name or DNS SRV/A resolvable) to the party you are
forwarding
to. The reason can be if you want the R-URI to contain the AOR and then
forward
the message to a server handling voicemail<br>
- The dst_uri parameter (implicitly set by lookup) will tell t_relay()
to send
the message to dst_uri instead of the Request-URI. lookup() will set
this when
it finds that the Contact stored for the AOR also has an associated
received
ip:port (because the user agent was NATed)<br>
<br>
In general trying all sorts of tricks o fix-up things the way you need
it may
not be so smart. Stick to the basics and question yourself: Is this
something I
really want to do?<br>
----------------------<br>
<br>
To Andy, you want the aliases table to map to the AOR (as registered by
the UA
in the REGISTER command). You do lookup("aliases") to resolve your
DID into an AOR. Then, later you can do lookup("location") to map the
AOR to the location of the UA (i.e. Contact/dst_uri). Then your
Request-URI
will be correct.<br>
<br>
g-)<br>
<br>
Andy Thomas wrote: <o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="black" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">Does anyone know how I
would do this-<u1:p></u1:p></span></font><o:p></o:p></p>
<p class="MsoNormal"><font color="black" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;"><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class="MsoNormal"><font color="black" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">For all users who have
PSTN access, they are assigned
a number in the MySQL alias table which matches a PSTN DDI number.<u1:p></u1:p></span></font><o:p></o:p></p>
<p class="MsoNormal"><font color="black" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">e.g. user 8000 has an
alias of 2071231234, so on an
incoming call the lookup(“aliases”) function correctly matches the
DDI to the user.<u1:p></u1:p></span></font><o:p></o:p></p>
<p class="MsoNormal"><font color="black" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;"><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class="MsoNormal"><font color="black" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">I want my ser.cfg to
rewrite the user on an outgoing
call, if a number exists in the alias table for that user<u1:p></u1:p></span></font><o:p></o:p></p>
<p class="MsoNormal"><font color="black" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">Obviously, the
rewriteuser function will be used, but
what do I put in after that?<u1:p></u1:p></span></font><o:p></o:p></p>
<p class="MsoNormal"><font color="black" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">I have tried rewriteuser
(lookup
(”aliases”)) but that doesn’t work<u1:p></u1:p></span></font><o:p></o:p></p>
<p class="MsoNormal"><font color="black" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;"><u1:p> </u1:p></span></font><o:p></o:p></p>
<p class="MsoNormal"><font color="black" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;">Can anyone help?<u1:p></u1:p></span></font><o:p></o:p></p>
<p class="MsoNormal"><font color="black" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial;"><u1:p> </u1:p></span></font><o:p></o:p></p>
<pre wrap=""><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;"><o:p> </o:p></span></font></pre>
<pre style="text-align: center;"><font color="black"
face="Courier New" size="2"><span style="font-size: 10pt;"><o:p> </o:p></span></font></pre>
<pre style="text-align: center;"><font color="black"
face="Courier New" size="2"><span style="font-size: 10pt;"><o:p> </o:p></span></font></pre>
<pre style="text-align: center;"><font color="black"
face="Courier New" size="2"><span style="font-size: 10pt;">
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<pre style="text-align: center;"><font color="black"
face="Courier New" size="2"><span style="font-size: 10pt;"><o:p> </o:p></span></font></pre>
<pre style="text-align: center;"><font color="black"
face="Courier New" size="2"><span style="font-size: 10pt;"><o:p> </o:p></span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;"><o:p> </o:p></span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;">_______________________________________________<o:p></o:p></span></font></pre>
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