[Serusers] call forwarding issue - attr_destination() error: Feb 12 14:37:53 rd ser[3979]: parse_nameaddr(): No < found - ottendorf

Michal Matyska michal at iptel.org
Mon Feb 12 20:40:36 UTC 2007


The difference is that there is the forwarded request visible...
#
U 2007/02/12 20:35:16.241648 192.168.1.2:5060 -> 192.168.1.2:5060
INVITE sip:hellboy at tezet.no-ip.org SIP/2.0.
Record-Route: <sip:192.168.1.2;ftag=1173592111;lr=on>.
Via: SIP/2.0/UDP 192.168.1.2;branch=z9hG4bKb946.ee8b4793.0.
Via: SIP/2.0/UDP
192.168.1.2:7061;rport=7061;branch=z9hG4bK7AF94D00BA07C6380C5EC3434F4EB592.
From: tomix <sip:tomix at tezet.no-ip.org:7061>;tag=1173592111.
To: <sip:tomix at tezet.no-ip.org>.
Contact: <sip:tomix at 192.168.1.2:7061>.
Call-ID: 0E6FCCFF-D661-0186-3392-977A4BBCDE86 at 192.168.1.2.
CSeq: 23808 INVITE.
Proxy-Authorization: Digest
username="tomix",realm="tezet.no-ip.org",nonce="45d0c2a0f928f22d790a5dfa17228b193d454c7e",response="0df094e8ea2808fa71d2fa28ccdfa8a4",uri="sip:tomix at tezet.no-ip.org",qop=auth,cnonce="67344073698582511BAA60061EBDA625",nc=00000001.
Max-Forwards: 16.
Content-Type: application/sdp.
User-Agent: X-Lite release 1105d.
Content-Length: 308.


If I understand it correctly you get this request being forwarded to the
contacs of tomix at tezet.no-ip.org and not hellboy at .... using usrloc
lookup (P-hint in the next INVITE).

Then you must have set the TO / USER avp name "uid" based on the To
header instead of request-uri. Check the lookup_user function calls, it
should be
for REGISTER 
lookup_user("To") or lookup_user("$tu.uid","@to.uri")

and for other requests
lookup_user("Request-uri") or lookup_user("$tu.uid","@ruri")


If you want to do some originating services, you can use
lookup_user("From") or lookup_user("$fu.uid", "@from.uri")

Michal



On Mon, 2007-02-12 at 20:41 +0100, tzieleniewski wrote:
> Ok I did it.
> There is no difference.
> Just to make sure I attached the file.
> 
> Because I left work I repeated the situation at home. I call to "myself" tomix at tezet.no-ip.org and I try to forward to hellboy at tezet.no-ip.org which is not registered.
> 
> I can also send my ser.cfg if it might help.
> 
> tomasz
> 
> > I see. Please capture the network on linux cooked interface "any", so
> > even the request sent over loopback will be visible.
> > 
> > Michal
> > 
> > On Mon, 2007-02-12 at 16:53 +0100, tzieleniewski wrote:
> > > Yes but this ruri sip:hellboy at 192.168.0.116:5060 is set after the invocation of lookup_contacts(). the function is invoked on the message which contains ruri changed by the forward_blind parameter.
> > > There is  first "round" when processing of the first INVITE reaches the checking of the forward_blind parameter after which I invoke the attr2uri and just after this make the t_relay. then there is second "round" with the changed ruri. before lookup_contacts I see the ruri as mm at voip.touk.pl and after sip:hellboy at 192.168.0.116:5060 which is in fact the location corresponding to sip:hellboy at voip.touk.pl.
> > > there is no message sending through the network but the message with the new ruri is processed which is visible in the log file I see it logged with the changed ruri??
> > > 
> > > So where is the problem??
> > > Is it the problem of attr2uri?
> > > I tried it by using rewriteuri() and it gave me the same result. changed ruri but lookup_contacts() returns value corresponding to the first ruri. Maybe 
> > > lookup_contacts() checks not the ruri??
> > >  
> > > 
> > > > Yes, your request-uri is sip:hellboy at 192.168.0.116:5060 which I think
> > > > will not be looked up in location (lookup_contact should fail), so it
> > > > does not rewrite the request-uri at all.
> > > > 
> > > > Michal
> > > > 
> > > > On Mon, 2007-02-12 at 16:05 +0100, tzieleniewski wrote:
> > > > > hmm
> > > > > it is strange because I can see that after attr2uri and t_relay() message again enters the main route block and goes through the whole processing but I can't see the message being send through the network. the recourd_route and via headers are being attached which is visible in the message send to unwanted (contained in the first invite - in this case myself because I try this by calling my self and setting forward_blind to another sip uri) destination:
> > > > > 
> > > > > U 2007/02/12 16:05:12.199566 192.168.0.74:5060 -> 192.168.0.116:5060
> > > > > INVITE sip:hellboy at 192.168.0.116:5060 SIP/2.0.
> > > > > Record-Route: <sip:192.168.0.74;ftag=218741881;lr=on>.
> > > > > Record-Route: <sip:192.168.0.74;ftag=218741881;lr=on>.
> > > > > Via: SIP/2.0/UDP 192.168.0.74;branch=z9hG4bK5141.91077cd7.0.
> > > > > Via: SIP/2.0/UDP 192.168.0.74;branch=z9hG4bK5141.81077cd7.0.
> > > > > Via: SIP/2.0/UDP 192.168.0.116:5060;rport=5060;branch=z9hG4bK0FCAE301A64EA5A82F9E7BE990AD76FB.
> > > > > From: hellboy <sip:hellboy at voip.touk.pl>;tag=218741881.
> > > > > To: <sip:hellboy at voip.touk.pl>.
> > > > > Contact: <sip:hellboy at 192.168.0.116:5060>.
> > > > > Call-ID: 4C739990-7D22-D9F2-72CE-D5F10A9BC99F at 192.168.0.116.
> > > > > CSeq: 54988 INVITE.
> > > > > Proxy-Authorization: Digest username="hellboy",realm="voip.touk.pl",nonce="45d08354b71cd0fddc45daa67447c271fd6b36db",response="054c2a5a43cb527ea70a8040dde9aaa0",uri="sip:hellboy at voip.touk.pl",qop=auth,cnonce="29546711E944E708A52A2122A1E71614",nc=00000001.
> > > > > Max-Forwards: 15.
> > > > > Content-Type: application/sdp.
> > > > > User-Agent: X-Lite release 1105d.
> > > > > Content-Length: 240.
> > > > > P-hint: usrloc applied.
> > > > > 
> > > > > I put the whole ngrep output in the attached file
> > > > > 
> > > > > Tomasz
> > > > > > Seems very strange to me, that incoming message would remember the
> > > > > > request uri as it was before rewrite.... do you really forward it?
> > > > > > 
> > > > > > Please attach network capture.
> > > > > > 
> > > > > > Michal
> > > > > > 
> > > > > > On Mon, 2007-02-12 at 15:23 +0100, tzieleniewski wrote:
> > > > > > > Thanks it worked but another thing appeared:)
> > > > > > > 
> > > > > > > Everything works fine, I see the message being routed again to ser with
> > > > > > > different ruri but at the end of the message processing when I invoke the 
> > > > > > > lookup_contacts("location") function the message is forwarded to the location which
> > > > > > > corresponds to the first ruri which was changed by attr2uri() function. 
> > > > > > > Please point me what do I miss.
> > > > > > > 
> > > > > > > Generally my procedure looks like this:
> > > > > > > 
> > > > > > > if inbound user then
> > > > > > >    check if user have forward_blind parameter
> > > > > > >      if yes 
> > > > > > >       rewrite ruri (attr2uri("$tr.forward_blind")) and forward with
> > > > > > > t_relay()
> > > > > > > 
> > > > > > > So for instance when I call myself and have the forward_blind set on the account on which user is not registered I get the 486 - busy response instead of the unavailable user.
> > > > > > > 
> > > > > > > 
> > > > > > > > On Mon, 2007-02-12 at 14:32 +0100, tzieleniewski wrote:
> > > > > > > > > Hi again 
> > > > > > > > > I found out that there appears the following error in the log:
> > > > > > > > > Feb 12 14:37:53 rd ser[3979]: parse_nameaddr(): No < found
> > > > > > > > 
> > > > > > > > The attr_destination uses the same uri parser as core, and is able to
> > > > > > > > accept event the nameaddr specification... so if you put uri without <>
> > > > > > > > you will get this "warning".
> > > > > > > > 
> > > > > > > > It just rewrites internal next hop, so the t_relay will send it as
> > > > > > > > appropriate. If you want to rewrite the request uri too use attr2uri
> > > > > > > > function call together with it.
> > > > > > > > 
> > > > > > > > Michal
> > > > > > > > 
> > > > > > > > > Please give me a hand with this issue:)
> > > > > > > > > 
> > > > > > > > > Thanks in advance
> > > > > > > > > -tomasz 
> > > > > > > > > 
> > > > > > > > > > Hi!!
> > > > > > > > > > 
> > > > > > > > > > I am trying to set up the blind call forwarding with the usage of attr_destination()
> > > > > > > > > > function.
> > > > > > > > > > I do the following I load the user attributes from user_attrs and uri_attrs table and then according to the loaded parameters I do:
> > > > > > > > > >    
> > > > > > > > > >    if ($tu.call_forward == "blind" && $tr.forward_blind)
> > > > > > > > > >    {
> > > > > > > > > >       xlog("L_INFO", " route[CALL_FORWARD]: fwd \n");
> > > > > > > > > >       attr_destination("$tr.forward_blind");
> > > > > > > > > >       xlog("L_INFO", " route[CALL_FORWARD]: route(FORWARD) \n");
> > > > > > > > > >       route(FORWARD);
> > > > > > > > > >       xlog("L_INFO", " route[CALL_FORWARD]: drop \n");
> > > > > > > > > >       drop;
> > > > > > > > > >    }
> > > > > > > > > > 
> > > > > > > > > > after the ser.cfg logic goes through this part I don't see any change in the request uri?? Please point me what do I miss?
> > > > > > > > > > 
> > > > > > > > > > here is my database contents:
> > > > > > > > > > mysql> select * from user_attrs where uid like 'hellboy%' and name like 'call_%';
> > > > > > > > > > +----------------------+--------------+-------+------+-------+
> > > > > > > > > > | uid                  | name         | value | type | flags |
> > > > > > > > > > +----------------------+--------------+-------+------+-------+
> > > > > > > > > > | hellboy at voip.touk.pl | call_forward | blind |    2 |     1 |
> > > > > > > > > > +----------------------+--------------+-------+------+-------+
> > > > > > > > > > 1 row in set (0.00 sec)
> > > > > > > > > > 
> > > > > > > > > > mysql> select * from uri_attrs where username like 'hellboy%';
> > > > > > > > > > +----------+--------------+---------------+----------------------+------+-------+--------+
> > > > > > > > > > | username | did          | name          | value                | type | flags | scheme |
> > > > > > > > > > +----------+--------------+---------------+----------------------+------+-------+--------+
> > > > > > > > > > | hellboy  | voip.touk.pl | forward_blind | sip:tzl at voip.touk.pl |    2 |     1 | sip    |
> > > > > > > > > > +----------+--------------+---------------+----------------------+------+-------+--------+
> > > > > > > > > > 1 row in set (0.00 sec)
> > > > > > > > > > 
> > > > > > > > > > Cheers
> > > > > > > > > > -tomasz
> > > > > > > > > > 
> > > > > > > > > > _______________________________________________
> > > > > > > > > > Serusers mailing list
> > > > > > > > > > Serusers at lists.iptel.org
> > > > > > > > > > http://lists.iptel.org/mailman/listinfo/serusers
> > > > > > > > > 
> > > > > > > > > _______________________________________________
> > > > > > > > > Serusers mailing list
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> > > > > > > > 
> > > > > > 
> > > > 
> > 



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