The service level tracing allows to enable message tracing for specific users and conditions.

littleIMS support the P-debug-ID defined in:

• draft-dawes-sipping-debug-00
• draft-dawes-sipping-debug-event-01
• draft-dawes-sipping-debug-id-01

Configuration

1. Open the provisionning page for the public user identity which requires debug. For instance, for sip:alice@cipango.org, it is:
     http://hss.cipango.voip:8080/littleims-hss/wicket/public-user-identity/edit/sip:alice@cipango.org
2. Click on "Add debug session"
   
3. Fill the start and stop triggers. For instance, in this case, logging will be start when Alice calls Carol and stops on call end.
   
4. If the S-CSCF has already loaded the user profile, update the profile by sending a Diameter PPR request:
   
5. the logs are available in the logs directory of the P-CSCF, I-CSCF and S-CSCF. The log file is constructed with the debug-ID + ".log".
   For instance, this is the log file generated on the I-CSCF.
   I-CSCF/logs/4a5112.log

   2009-08-17 12:08:16 IN  UDP 192.168.2.10:5080 < 192.168.2.10:5070
   
   INVITE sip:carol@cipango.org SIP/2.0
   Via: SIP/2.0/UDP 192.168.2.10:5070;branch=z9hG4bK6c75491079e7
   Via: SIP/2.0/UDP 192.168.2.10:5060;branch=z9hG4bK0f38f2c3c824
   Via: SIP/2.0/UDP 127.0.0.1:3023;received=192.168.2.10;branch=z9hG4bK4966;rport=3023
   Content-Type: application/sdp
   Privacy: none
   P-Access-Network-Info: ADSL;utran-cell-id-3gpp=00000000
   Content-Length: 252
   Allow-Events: presence,presence.winfo
   Allow: INVITE,ACK,CANCEL,BYE,MESSAGE,OPTIONS,NOTIFY,PRACK,REFER
   Max-Forwards: 68
   Supported: sdp-anat
   From: <sip:alice@cipango.org>;tag=14526
   Call-ID: 1250501801910@127.0.0.1
   P-Debug-ID: 4a5112
   Route: <sip:icscf@i-cscf.cipango.voip:5080;lr>
   Contact: <sip:alice@127.0.0.1:3023;transport=udp>;expires=1000
   P-Preferred-Service: urn:urn-xxx:3gpp-service.ims.icsi.mmtel
   User-Agent: Mercuro IMS Client Bronze 4.0.1178.0
   To: <sip:carol@cipango.org>
   P-Asserted-Identity: <sip:alice@cipango.org>
   CSeq: 601 INVITE
   P-Charging-Vector: icid-value=AyretyU0dm+6O2IrT5tAFrbHLso=023551024
   Record-Route: <sip:aid!8c3b3f57@s-cscf.cipango.voip:5070;lr>,<sip:aid!984b34f3@p-cscf.cipango.voip:5060;lr>
   
   v=0
   o=- 3344 3344 IN IP4 127.0.0.1
   s=Mercuro IMS Client Session
   t=0 0
   m=audio 34500 RTP/AVP 0 8 101
   c=IN IP4 127.0.0.1
   a=rtpmap:0 PCMU/8000/1
   a=rtpmap:8 PCMA/8000/1
   a=rtpmap:101 telephone-event/8000
   a=fmtp:101 0-15
   a=silenceSupp:off - - - -
   
   2009-08-17 12:08:16 OUT UDP 192.168.2.10:5080 > 192.168.2.10:5070
   
   SIP/2.0 100 Trying
   Via: SIP/2.0/UDP 192.168.2.10:5070;branch=z9hG4bK6c75491079e7
   Via: SIP/2.0/UDP 192.168.2.10:5060;branch=z9hG4bK0f38f2c3c824
   Via: SIP/2.0/UDP 127.0.0.1:3023;received=192.168.2.10;branch=z9hG4bK4966;rport=3023
   From: <sip:alice@cipango.org>;tag=14526
   To: <sip:carol@cipango.org>
   Call-ID: 1250501801910@127.0.0.1
   CSeq: 601 INVITE
   Record-Route: <sip:aid!8c3b3f57@s-cscf.cipango.voip:5070;lr>,<sip:aid!984b34f3@p-cscf.cipango.voip:5060;lr>
   Content-Length: 0
   
   
   2009-08-17 12:08:16 OUT UDP 192.168.2.10:5080 > 192.168.2.10:5070
   
   SIP/2.0 480 Temporarily Unavailable
   Via: SIP/2.0/UDP 192.168.2.10:5070;branch=z9hG4bK6c75491079e7
   Via: SIP/2.0/UDP 192.168.2.10:5060;branch=z9hG4bK0f38f2c3c824
   Via: SIP/2.0/UDP 127.0.0.1:3023;received=192.168.2.10;branch=z9hG4bK4966;rport=3023
   From: <sip:alice@cipango.org>;tag=14526
   To: <sip:carol@cipango.org>;tag=f6407148
   Call-ID: 1250501801910@127.0.0.1
   CSeq: 601 INVITE
   Content-Length: 0