[Serusers] Need help with -> sl_filter_ACK: to late to be a local ACK!

[Dustin Goodwin]

I am running into a problem where SER does not recognize a ua trying to 
ACK a INVITE 200 OK response. It seems to be the result of pairing of 
certain SIP ua Mfg. Not all UA's exhibit the problem.

1. Destination UA sends 200 OK to ser
2. SER forwards to origin UA
3. Origin ua sends ACK to SER
4. SER declares "sl_filter_ACK: to late to be a local ACK!"
5. destination UA resends 200 OK and does not open talk path, origin 
device believes call is connected

The ACK seems to arrive just at the right time so I am not sure what the 
"to late" debug means.

Greetings from the Interop+Networld SIP ilabs hotstage in Santa Clara 
California. http://www.interop.com/lasvegas2004/interopnet/

- Dustin -

Apr  5 23:06:22 ser /usr/local/sbin/ser[6282]: SIP Request:
Apr  5 23:06:22 ser /usr/local/sbin/ser[6282]:  method:  <ACK>
Apr  5 23:06:22 ser /usr/local/sbin/ser[6282]:  uri: 
<sip:4991 at 45.210.3.91:5060>
Apr  5 23:06:22 ser /usr/local/sbin/ser[6282]:  version: <SIP/2.0>
Apr  5 23:06:22 ser /usr/local/sbin/ser[6282]: parse_headers: flags=1
Apr  5 23:06:22 ser /usr/local/sbin/ser[6282]: Found param type 232, 
<branch> = <z9hG4bK8872b9128>; state=16
Apr  5 23:06:22 ser /usr/local/sbin/ser[6282]: end of header reached, 
state=5
Apr  5 23:06:22 ser /usr/local/sbin/ser[6282]: parse_headers: Via found, 
flags=1
Apr  5 23:06:22 ser /usr/local/sbin/ser[6282]: parse_headers: this is 
the first via
Apr  5 23:06:22 ser /usr/local/sbin/ser[6282]: After parse_msg...
Apr  5 23:06:22 ser /usr/local/sbin/ser[6282]: DEBUG : sl_filter_ACK: to 
late to be a local ACK!

Origin UA 45.210.9.83
SER 45.210.9.21
Dest UA 45.210.3.91

     No. Time        Source                Destination 
Protocol Info
      33 15.496582   45.210.9.83 45.210.9.21 SIP/SDP  Request: INVITE 
sip:4991 at 45.210.9.21:5060, with session description
      34 15.513769   45.210.9.21 45.210.9.83 SIP      Status: 100 trying 
-- your call is important to us
      35 15.515818   45.210.9.21 45.210.3.91 SIP/SDP  Request: INVITE 
sip:4991 at 45.210.3.91:5060, with session description
      36 15.850049   45.210.9.21 45.210.3.91 SIP/SDP  Request: INVITE 
sip:4991 at 45.210.3.91:5060, with session description
      37 16.108079   45.210.3.91 45.210.9.21 SIP      Status: 100 Trying
      38 16.108576   45.210.3.91 45.210.9.21 SIP      Status: 180 Ringing
      41 16.140632   45.210.9.21 45.210.9.83 SIP      Status: 180 Ringing
      48 19.346818   45.210.3.91 45.210.9.21 SIP/SDP  Status: 200 OK, 
with session description
      49 19.355727   45.210.9.21 45.210.9.83 SIP/SDP  Status: 200 OK, 
with session description
      50 19.377798   45.210.9.83 45.210.9.21 SIP      Request: ACK 
sip:4991 at 45.210.3.91:5060
      51 19.843133   45.210.3.91 45.210.9.21 SIP/SDP  Status: 200 OK, 
with session description
      52 19.855180   45.210.9.21 45.210.9.83 SIP/SDP  Status: 200 OK, 
with session description
      53 19.867245   45.210.9.83 45.210.9.21 SIP      Request: ACK 
sip:4991 at 45.210.3.91:5060
      56 20.844637   45.210.3.91 45.210.9.21 SIP/SDP  Status: 200 OK, 
with session description
      57 20.855263   45.210.9.21 45.210.9.83 SIP/SDP  Status: 200 OK, 
with session description
      58 20.867249   45.210.9.83 45.210.9.21 SIP      Request: ACK 
sip:4991 at 45.210.3.91:5060
      63 22.843774   45.210.3.91 45.210.9.21 SIP/SDP  Status: 200 OK, 
with session description
      64 22.855381   45.210.9.21 45.210.9.83 SIP/SDP  Status: 200 OK, 
with session description
      69 25.012302   45.210.3.91 45.210.9.21 SIP      Request: BYE 
sip:4991 at 45.210.9.21:5060;ftag=1B1B70-179F;lr=on
      70 25.026340   45.210.9.21 45.210.9.83 SIP      Request: BYE 
sip:45.210.9.83:5060
      71 25.057274   45.210.9.83 45.210.9.21 SIP      Status: 200 OK
      72 25.067464   45.210.9.21 45.210.3.91 SIP      Status: 200 OK