1 Dec
2009
1 Dec
'09
4:56 p.m.
Hi Florian!
1. As Asterisk detects the "spiral" and handles it internally, there is
nothing you can do in Kamailio.
2. Just a warning: In general, Remote-Party-ID is used for CLI
indication, not for billing purposes. In your setup it might be possibly
to use RPID for billing to, but it would be better to use the proper
headers, like the obsolete (as you are using RPID I suspect you like
obsolete headers ;-) Diversion header, or the History-Info header.
(another warning: make sure that your system ignores/removes these
headers when sent by your customers - otherwise they can fool your
billing system and signal arbitrary CLIs)
3. You can for example easily bypass the problem by making the DB lookup
also in Asterisk. Use e.g. func_odbc to query your call-forwarding table
from within Asterisk, set the CDR(whatever) variables to fulfill you
billing requirements, and then send the call to the PSTN again.
regards
Klaus
Florian Meister wrote:
Hi,
basically I'm using this structure at the moment:
SIP Users <----> Kamailio <-----> Asterisk <-----> PSTN
I have to add a diversion-functionality at kamailio-level, so to simply rewrite $ru with
something else defined in the database. That's working without problems. For billing
issues, I also have to add a Remote-Party-ID header, set to the SIP user, which initiated
the redirect in the database.
Now to the problem:
When a call is coming from PSTN, it's passing the asterisk server, then at kamailio
level $ru is rewritten and sent back to asterisk (I'm talking about a redirect to a
number in PSTN here)
What I've seen from the logs is, that asterisk is seeing that it gets an invite back
with the same call-id, and therefore it cancels the original invite and handles the whole
call internally via the Local Channel. The Problem is, that in the invite sent from
kamailio back to asterisk, I've set a Remote-Party-ID header to tell asterisk to set
the Callerid correctly for billing purposes. Now it seems that asterisk is _ignoring_ this
header from the second invite.
So is this an expected behavior ? If yes, how to do it correctly ?
Below you can see the verbose output of asterisk. Since the call is handled at
"Local" Channels the function to read sip headers does not work. The only
message I get is "thanks to SIP/tpsiptestproxyu01-00d0a0b8".
-- Called tpsiptestproxyu01/+435572949012
-- Now forwarding DAHDI/2-1 to 'Local/066480588134@from-internal' (thanks to
SIP/tpsiptestproxyu01-00d0a0b8)
-- Executing [066480588134@from-internal:1]
NoOp("Local/066480588134@from-internal-d69e;2", "435572501134") in new
stack
[Dec 1 15:14:50] WARNING[20506]: chan_sip.c:15797 func_header_read: This function can
only be used on SIP channels.
-- Executing [066480588134@from-internal:2]
NoOp("Local/066480588134@from-internal-d69e;2", "") in new stack
-- Executing [066480588134@from-internal:3]
Dial("Local/066480588134@from-internal-d69e;2",
"DAHDI/G0/066480588134") in new stack
-- Requested transfer capability: 0x00 - SPEECH
-- Called G0/066480588134
-- DAHDI/124-1 is proceeding passing it to Local/066480588134@from-internal-d69e;2
-- Local/066480588134@from-internal-d69e;1 is proceeding passing it to DAHDI/2-1
In the SIP debug you can see that asterisk is cancelling the dialog with kamailio and
doing it itself:
13:49:30.589054 IP [--ASTERISK--].5060 > [--KAMAILIO--].5060: SIP, length: 938
E.......@..L..,L..,N........INVITE sip:+435572949012@[--KAMAILIO--] SIP/2.0
Via: SIP/2.0/UDP [--ASTERISK--]:5060;branch=z9hG4bK5629d66b;rport
Max-Forwards: 70
From: "435572501134" <sip:435572501134@[--ASTERISK--]>;tag=as27658014
To: <sip:+435572949012@[--KAMAILIO--]>
Contact: <sip:435572501134@[--ASTERISK--]>
Call-ID: 4bbee84339a9e2d30850185317983625@[--ASTERISK--]
CSeq: 102 INVITE
User-Agent: Asterisk PBX 1.6.1.5
Remote-Party-ID: "435572501134"
<sip:435572501134@[--ASTERISK--]>;privacy=off;screen=yes
Date: Tue, 01 Dec 2009 12:49:30 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 263
v=0
o=root 930830518 930830518 IN IP4 [--ASTERISK--]
s=Asterisk PBX 1.6.1.5
c=IN IP4 [--ASTERISK--]
t=0 0
m=audio 16924 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSupp:off - - - -
a=ptime:20
a=sendrecv
13:49:30.591037 IP [--KAMAILIO--].5060 > [--ASTERISK--].5060: SIP, length: 342
E..r..@.@.[0..,N..,L.....^.aSIP/2.0 100 Trying
Via: SIP/2.0/UDP [--ASTERISK--]:5060;branch=z9hG4bK5629d66b;rport=5060
From: "435572501134" <sip:435572501134@[--ASTERISK--]>;tag=as27658014
To: <sip:+435572949012@[--KAMAILIO--]>
Call-ID: 4bbee84339a9e2d30850185317983625@[--ASTERISK--]
CSeq: 102 INVITE
Server: OpenSER (1.3.2-notls (x86_64/linux))
Content-Length: 0
13:49:30.594345 IP [--KAMAILIO--].5060 > [--ASTERISK--].5060: SIP, length: 1093
E..a..@.@.XA..,N..,L.....M+LINVITE sip:066480588134@[--ASTERISK--]:5060;transport=udp
SIP/2.0
Record-Route: <sip:[--KAMAILIO--];lr;ftag=as27658014>
Via: SIP/2.0/UDP [--KAMAILIO--];branch=z9hG4bK06.05390227.0
Via: SIP/2.0/UDP [--ASTERISK--]:5060;branch=z9hG4bK5629d66b;rport=5060
Max-Forwards: 69
From: "435572501134" <sip:435572501134@[--ASTERISK--]>;tag=as27658014
To: <sip:+435572949012@[--KAMAILIO--]>
Contact: <sip:435572501134@[--ASTERISK--]>
Call-ID: 4bbee84339a9e2d30850185317983625@[--ASTERISK--]
CSeq: 102 INVITE
User-Agent: Asterisk PBX 1.6.1.5
Date: Tue, 01 Dec 2009 12:49:30 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 263
Remote-Party-ID: "435572949012"
<sip:435572949012@tpseru01.tele.net>;party=caller;privacy=none;screen=yes
v=0
o=root 930830518 930830518 IN IP4 [--ASTERISK--]
s=Asterisk PBX 1.6.1.5
c=IN IP4 [--ASTERISK--]
t=0 0
m=audio 16924 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSupp:off - - - -
a=ptime:20
a=sendrecv
13:49:30.594605 IP [--ASTERISK--].5060 > [--KAMAILIO--].5060: SIP, length: 460
E.......@..)..,L..,N....... CANCEL sip:+435572949012@[--KAMAILIO--] SIP/2.0
Via: SIP/2.0/UDP [--ASTERISK--]:5060;branch=z9hG4bK5629d66b;rport
Max-Forwards: 70
From: "435572501134" <sip:435572501134@[--ASTERISK--]>;tag=as27658014
To: <sip:+435572949012@[--KAMAILIO--]>
Call-ID: 4bbee84339a9e2d30850185317983625@[--ASTERISK--]
CSeq: 102 CANCEL
User-Agent: Asterisk PBX 1.6.1.5
Remote-Party-ID: "435572501134"
<sip:435572501134@[--ASTERISK--]>;privacy=off;screen=yes
Content-Length: 0
13:49:30.596307 IP [--KAMAILIO--].5060 > [--ASTERISK--].5060: SIP, length: 387
E.....@.@.[...,N..,L.......KSIP/2.0 200 canceling
Via: SIP/2.0/UDP [--ASTERISK--]:5060;branch=z9hG4bK5629d66b;rport=5060
From: "435572501134" <sip:435572501134@[--ASTERISK--]>;tag=as27658014
To: <sip:+435572949012@[--KAMAILIO--]>;tag=45db18648893e7acabf725621374d382-4ddb
Call-ID: 4bbee84339a9e2d30850185317983625@[--ASTERISK--]
CSeq: 102 CANCEL
Server: OpenSER (1.3.2-notls (x86_64/linux))
Content-Length: 0
13:49:30.596801 IP [--KAMAILIO--].5060 > [--ASTERISK--].5060: SIP, length: 396
E.....@.@.Z...,N..,L.......kSIP/2.0 487 Request Terminated
Via: SIP/2.0/UDP [--ASTERISK--]:5060;branch=z9hG4bK5629d66b;rport=5060
From: "435572501134" <sip:435572501134@[--ASTERISK--]>;tag=as27658014
To: <sip:+435572949012@[--KAMAILIO--]>;tag=45db18648893e7acabf725621374d382-4ddb
Call-ID: 4bbee84339a9e2d30850185317983625@[--ASTERISK--]
CSeq: 102 INVITE
Server: OpenSER (1.3.2-notls (x86_64/linux))
Content-Length: 0
13:49:30.596842 IP [--ASTERISK--].5060 > [--KAMAILIO--].5060: SIP, length: 539
E..7....@.....,L..,N.....#.oACK sip:+435572949012@[--KAMAILIO--] SIP/2.0
Via: SIP/2.0/UDP [--ASTERISK--]:5060;branch=z9hG4bK5629d66b;rport
Max-Forwards: 70
From: "435572501134" <sip:435572501134@[--ASTERISK--]>;tag=as27658014
To: <sip:+435572949012@[--KAMAILIO--]>;tag=45db18648893e7acabf725621374d382-4ddb
Contact: <sip:435572501134@[--ASTERISK--]>
Call-ID: 4bbee84339a9e2d30850185317983625@[--ASTERISK--]
CSeq: 102 ACK
User-Agent: Asterisk PBX 1.6.1.5
Remote-Party-ID: "435572501134"
<sip:435572501134@[--ASTERISK--]>;privacy=off;screen=yes
Content-Length: 0
Thanks,
Florian
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