[sr-dev] problem with locally generated ACKs

[Juha Heinanen]

Daniel-Constantin Mierla writes:

 > ack and cancel are generated by other part of tm, where event_route is 
 > not executed. However, afaik, tm should automatically send the such ack 
 > and cancel where the invite was sent.

daniel,

thanks for your response.  see wireshark output below.  ack is NOT sent
to the same ip/port as invite.

-- juha

------------------------------------------------------------------------

No.     Time            Source                Destination           Protocol Info
      4 15:48:23.012034 192.98.101.10         192.98.101.132        SIP/SDP  Request: INVITE sip:jh_tutpro_com at 192.168.0.169:5074;transport=udp, with session description

Frame 4 (624 bytes on wire, 624 bytes captured)
Linux cooked capture
Internet Protocol, Src: 192.98.101.10 (192.98.101.10), Dst: 192.98.101.132 (192.98.101.132)
User Datagram Protocol, Src Port: sip (5060), Dst Port: 60705 (60705)
Session Initiation Protocol
    Request-Line: INVITE sip:jh_tutpro_com at 192.168.0.169:5074;transport=udp SIP/2.0
    Message Header
        Via: SIP/2.0/UDP 192.98.101.10;branch=z9hG4bKfb.dfd399d1.0
        To: <sip:jh at tutpro.com>
        From: <sip:click2dial at tutpro.com>;tag=4b2a36a70277f
        CSeq: 1 INVITE
        Call-ID: 4b2a36a70277f at tutpro.com
        Content-Length: 131
        User-Agent: SIP Proxy  (2.99.99-pre3 (i386/linux))
        Contact: <sip:click2dial at 192.98.101.10:5060>
        Reject-Contact: *;automata="YES"
        Content-Type: application/sdp
    Message Body
        Session Description Protocol
            Session Description Protocol Version (v): 0
            Owner/Creator, Session Id (o): click-to-dial 0 0 IN IP4 0.0.0.0
            Session Name (s): session
            Connection Information (c): IN IP4 0.0.0.0
            Bandwidth Information (b): CT:1000
            Time Description, active time (t): 0 0
            Media Description, name and address (m): audio 9 RTP/AVP 0
            Media Attribute (a): rtpmap:0 PCMU/8000

No.     Time            Source                Destination           Protocol Info
      8 15:48:25.439877 192.98.101.132        192.98.101.10         SIP/SDP  Status: 200 OK, with session description

Frame 8 (719 bytes on wire, 719 bytes captured)
Linux cooked capture
Internet Protocol, Src: 192.98.101.132 (192.98.101.132), Dst: 192.98.101.10 (192.98.101.10)
User Datagram Protocol, Src Port: 60705 (60705), Dst Port: sip (5060)
Session Initiation Protocol
    Status-Line: SIP/2.0 200 OK
    Message Header
        Via: SIP/2.0/UDP 192.98.101.10;branch=z9hG4bKfb.dfd399d1.0
        To: <sip:jh at tutpro.com>;tag=qpgxk
        From: <sip:click2dial at tutpro.com>;tag=4b2a36a70277f
        Call-ID: 4b2a36a70277f at tutpro.com
        CSeq: 1 INVITE
        Contact: <sip:jh_tutpro_com at 192.168.0.169:5074;transport=udp>
        Content-Type: application/sdp
        Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,PRACK,REFER,NOTIFY,SUBSCRIBE,INFO,MESSAGE
        Server: Twinkle/1.3.2
        Supported: replaces,norefersub
        Content-Length: 208
    Message Body
        Session Description Protocol
            Session Description Protocol Version (v): 0
            Owner/Creator, Session Id (o): twinkle 1232785010 225740651 IN IP4 192.168.0.169
            Session Name (s): -
            Connection Information (c): IN IP4 192.168.0.169
            Time Description, active time (t): 0 0
            Media Description, name and address (m): audio 8000 RTP/AVP 0 101
            Media Attribute (a): rtpmap:0 PCMU/8000
            Media Attribute (a): rtpmap:101 telephone-event/8000
            Media Attribute (a): fmtp:101 0-15
            Media Attribute (a): ptime:20

No.     Time            Source                Destination           Protocol Info
      9 15:48:25.440175 192.98.101.10         192.168.0.169         SIP      Request: ACK sip:jh_tutpro_com at 192.168.0.169:5074;transport=udp

Frame 9 (384 bytes on wire, 384 bytes captured)
Linux cooked capture
Internet Protocol, Src: 192.98.101.10 (192.98.101.10), Dst: 192.168.0.169 (192.168.0.169)
User Datagram Protocol, Src Port: sip (5060), Dst Port: alesquery (5074)
Session Initiation Protocol
    Request-Line: ACK sip:jh_tutpro_com at 192.168.0.169:5074;transport=udp SIP/2.0
    Message Header
        Via: SIP/2.0/UDP 192.98.101.10;branch=z9hG4bKfb.dfd399d1.0
        From: <sip:click2dial at tutpro.com>;tag=4b2a36a70277f
        Call-ID: 4b2a36a70277f at tutpro.com
        To: <sip:jh at tutpro.com>;tag=qpgxk
        CSeq: 1 ACK
        User-Agent: SIP Proxy  (2.99.99-pre3 (i386/linux))
        Content-Length: 0