[SR-Users] ACK problem with FreeSwitch-Kamailio SBC implementation.

[Ricardo Martinez]

Hello.

I was wondering if someone can help me with some problem that I’m having
with the combination of FreeSwitch and Kamailio as SBC.

I’m having and ACK not routed by kamailio and dropped.

Here is the debug.



100.100.100.211:5060 : Kamailio

100.100.100.211:5090 : FreeSwitch

100.100.100.108 : Caller

100.100.100.212 : Calle



    Request-Line: INVITE
sip:02131234 at 100.100.100.211<sip%3A02131234 at 100.100.100.211>SIP/2.0

        Method: INVITE

        [Resent Packet: False]

    Message Header

        Via: SIP/2.0/UDP 64.76.148.108:42772
;branch=z9hG4bK-d8754z-da0b2e4b1b5d0843-1---d8754z-;rport

        Max-Forwards: 70

        Contact: <sip:1234 at 64.76.148.108:42772>

        To: <sip:02131234 at 100.100.100.211 <sip%3A02131234 at 100.100.100.211>>

        From: "camila"<sip:1234 at 100.100.100.211 <sip%3A1234 at 100.100.100.211>
>;tag=8422566b

        Call-ID: MjY2NDY5NTE3OTk4MzdmMjE0YWQxNWQ4MWFmY2JhMWQ.

        CSeq: 1 INVITE

        Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
SUBSCRIBE, INFO

        Content-Type: application/sdp

        User-Agent: Bria release 2.2 stamp 45414

        Content-Length: 388

    Message Body

        Session Description Protocol



    Status-Line: SIP/2.0 100 trying -- your call is important to us

        Status-Code: 100

        [Resent Packet: False]

    Message Header

        Via: SIP/2.0/UDP 64.76.148.108:42772
;branch=z9hG4bK-d8754z-da0b2e4b1b5d0843-1---d8754z-;rport=42772

        To: <sip:02131234 at 100.100.100.211 <sip%3A02131234 at 100.100.100.211>>

        From: "camila"<sip:1234 at 100.100.100.211 <sip%3A1234 at 100.100.100.211>
>;tag=8422566b

        Call-ID: MjY2NDY5NTE3OTk4MzdmMjE0YWQxNWQ4MWFmY2JhMWQ.

        CSeq: 1 INVITE

        Server: kamailio (3.1.1 (i386/linux))

        Content-Length: 0



    Status-Line: SIP/2.0 200 OK

        Status-Code: 200

        [Resent Packet: False]

    Message Header

        Via: SIP/2.0/UDP 64.76.148.108:42772
;branch=z9hG4bK-d8754z-da0b2e4b1b5d0843-1---d8754z-;rport=42772

       Record-Route: <sip:100.100.100.211;lr=on>

        From: "camila" <sip:1234 at 100.100.100.211<sip%3A1234 at 100.100.100.211>
>;tag=8422566b

        To: <sip:02131234 at 100.100.100.211 <sip%3A02131234 at 100.100.100.211>
>;tag=pBZjZayFUeDSp

        Call-ID: MjY2NDY5NTE3OTk4MzdmMjE0YWQxNWQ4MWFmY2JhMWQ.

        CSeq: 1 INVITE

        Contact: <sip:02131234 at 100.100.100.211:5090;transport=udp>

        User-Agent: FreeSWITCH-mod_sofia/1.0.head-git-d41e649 2011-01-11
12-25-55 -0600

        Accept: application/sdp

    Message Body

        Session Description Protocol





    Request-Line: ACK sip:02131234 at 100.100.100.211:5090;transport=udp
SIP/2.0

        Method: ACK

        [Resent Packet: False]

    Message Header

        Via: SIP/2.0/UDP 64.76.148.108:42772
;branch=z9hG4bK-d8754z-182d537bcb534165-1---d8754z-;rport

        Max-Forwards: 70

        Route: <sip:100.100.100.211;lr>

        Contact: <sip:1234 at 64.76.148.108:42772>

        To: <sip:02131234 at 100.100.100.211 <sip%3A02131234 at 100.100.100.211>
>;tag=pBZjZayFUeDSp

        From: "camila"<sip:1234 at 100.100.100.211 <sip%3A1234 at 100.100.100.211>
>;tag=8422566b

        Call-ID: MjY2NDY5NTE3OTk4MzdmMjE0YWQxNWQ4MWFmY2JhMWQ.

        CSeq: 1 ACK

        User-Agent: Bria release 2.2 stamp 45414

        Content-Length: 0



    Status-Line: SIP/2.0 200 OK

        Status-Code: 200

        [Resent Packet: True]

        [Suspected resend of frame: 7]

    Message Header

        Via: SIP/2.0/UDP 64.76.148.108:42772
;branch=z9hG4bK-d8754z-da0b2e4b1b5d0843-1---d8754z-;rport=42772

        Record-Route: <sip:100.100.100.211;lr=on>

        From: "camila" <sip:1234 at 100.100.100.211<sip%3A1234 at 100.100.100.211>
>;tag=8422566b

        To: <sip:02131234 at 100.100.100.211 <sip%3A02131234 at 100.100.100.211>
>;tag=pBZjZayFUeDSp

        Call-ID: MjY2NDY5NTE3OTk4MzdmMjE0YWQxNWQ4MWFmY2JhMWQ.

        CSeq: 1 INVITE

        Contact: <sip:02131234 at 100.100.100.211:5090;transport=udp>

        User-Agent: FreeSWITCH-mod_sofia/1.0.head-git-d41e649 2011-01-11
12-25-55 -0600

        Accept: application/sdp

    Message Body

        Session Description Protocol





When I removed Freeswitch from the path the ACK is routed ok.

The ACK is routed by loose_route, but then it fails because the



if ( t_check_trans() ) {





What could be happening?



Regards,

Ricardo.-



*Ricardo Martínez **|* Ingeniero de Desarrollo
RedVoiss *|* rmartinez at redvoiss.net

Santiago - Chile *|* +56 2 2408196
www.redvoiss.net
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