Hi,
I am faced with this dilema of asterisk not sending an ACK after it receives
200 OK from OpenSER (which is a response to a reinvite request sent by
asterisk. Here is my setup
Carrier<->OpenSER<->Asterisk1<->Asterisk2
A user is connected with Asterisk1 (through the carrier and OpenSER). On
certain dtmf events the call is forwarded to Asterisk2 using the Dial
command. Canreinvite is set to "yes" in Asterisk1's sip.conf, therefore it
sends reinvites to both Asterisk2 and OpenSER to release RTP.
OpenSER forwards the reinvite to the carrier and relays the 200 OK received
back to Asterisk1 but Asterisk1 never responds back with an ACK. Finally the
transaction on OpenSER times out and a bye message is sent to Asterisk1,
causing both legs to be hungup. If I reset canreinite to no the scenario
works.
The Invite message sent to OpenSER and 200 OK received are shown below:
INVITE sent
-----------
Session Initiation Protocol
Request-Line: INVITE sip:[EMAIL PROTECTED];transport=udp SIP/2.0
Method: INVITE
Resent Packet: False
Message Header
Via: SIP/2.0/UDP 192.168.0.3:5060;branch=z9hG4bK67156992;rport
Route: <sip:192.168.0.2;ftag=as04d1d0dc;lr=on>
From: "16477239819" <sip:[EMAIL PROTECTED]>;tag=as04d1d0dc
To: <sip:[EMAIL PROTECTED]>;tag=d12f2182-140a6d
Contact: <sip:[EMAIL PROTECTED]>
Call-ID: [EMAIL PROTECTED]
CSeq: 104 INVITE
User-Agent: Asterisk
Max-Forwards: 70
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Content-Type: application/sdp
Content-Length: 245
"SDP not shown"
200 OK received
---------------
Session Initiation Protocol
Status-Line: SIP/2.0 200 OK
Message Header
Call-ID: [EMAIL PROTECTED]
Contact: <sip:[EMAIL PROTECTED];transport=udp>
Content-Length: 232
Content-Type: application/sdp
CSeq: 103 INVITE
From: "16477239819"<sip:[EMAIL PROTECTED]>;tag=as04d1d0dc
Record-Route: <sip:192.168.0.2;ftag=as04d1d0dc;lr=on>
To: <sip:[EMAIL PROTECTED]>;tag=d12f2182-140a6d
User-Agent: Quintum/1.0.0
Via: SIP/2.0/UDP 192.186.0.3:5060;branch=z9hG4bK0f664853;rport=5060
"SDP not shown"
Now the interesting thing is that if I take out OpenSER and forward directly
to the carrier then it works fine. The 200 OK received from the carrier is
shown below
Session Initiation Protocol
Status-Line: SIP/2.0 200 OK
Status-Code: 200
Resent Packet: False
Message Header
Call-ID: [EMAIL PROTECTED]
Contact: <sip:[EMAIL PROTECTED]>
Content-Length: 232
Content-Type: application/sdp
CSeq: 103 INVITE
From: "16477239819"<sip:[EMAIL PROTECTED]>;tag=as41da20f1
To: <sip:[EMAIL PROTECTED]>;tag=d12f2182-140d2e
User-Agent: Quintum/1.0.0
Via: SIP/2.0/UDP 192.168.0.3:5060;branch=z9hG4bK0e1703c7;rport
The differences I notice are
1. OpenSER modifies "rport" at the end of Via to "rport=5060".
2. Openser appending "transport=udp" in Contact.
I am using Asterisk 1.2-18, canreinvite is set to yes and nat is set to no.
I will really appreciate if someone can shed some light on this issue and
help me fix it.
Regards,
Danish
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