[Serusers] possible rr bug

[Ramin Nikaeen]

Hi Everyone,

 

I am really stuck here. I really need help!

 

I receive the following ACK request in SER from a Linksys/PAP user agent

that SER should forward to the destination User Agent: 1234560133.

 

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

ACK sip:10.1.10.65;ftag=cff8d63370ff3ed5o0 SIP/2.0


Via: SIP/2.0/UDP 172.16.15.51:5060;branch=z9hG4bK-5b186b5;rport


From: 1234560133
<sip:2224440133 at host.domain.name>;tag=cff8d63370ff3ed5o0


To: <sip:1234560131 at host.domain.name>;tag=26001139010904


Call-ID: 9b54d80b-81b366dd at 172.16.15.51


CSeq: 101 ACK


Max-Forwards: 70


Route: <sip:1234569999 at 10.1.10.65:5060>


Contact: 1234560133 <sip:1234560133 at 172.16.15.51:5060>


User-Agent: Linksys/PAP2-3.1.5(LS)


Content-Length: 0


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

                       

But the loose_route function transforms it to the following and as a
result it is routed 

back to SER and therefore falls into an infinite loop as shown by the
couple of ACKs

that get looped through SER:

 

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

ACK sip:10.1.10.65;ftag=cff8d63370ff3ed5o0 SIP/2.0


Record-Route: <sip:10.1.10.65;ftag=cff8d63370ff3ed5o0;lr=on>


Via: SIP/2.0/UDP 10.1.10.65;branch=0


Via: SIP/2.0/UDP 172.16.15.51:5060;branch=z9hG4bK-5b186b5;rport=5060


From: 2224440133 <sip:2224440133 at cl1.glphone.com>;tag=cff8d63370ff3ed5o0


To: <sip:2224440131 at cl1.glphone.com>;tag=26001139010904


Call-ID: 9b54d80b-81b366dd at 172.16.15.51


CSeq: 101 ACK


Max-Forwards: 16


Contact: 2224440133 <sip:2224440133 at 172.16.15.51:5060>


User-Agent: Linksys/PAP2-3.1.5(LS)


Content-Length: 0


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

 

ACK sip:10.1.10.65;ftag=cff8d63370ff3ed5o0 SIP/2.0

Record-Route: <sip:10.1.10.65;ftag=cff8d63370ff3ed5o0;lr=on>

Record-Route: <sip:10.1.10.65;ftag=cff8d63370ff3ed5o0;lr=on>


Via: SIP/2.0/UDP 10.1.10.65;branch=0


Via: SIP/2.0/UDP 10.1.10.65;branch=0


Via: SIP/2.0/UDP 172.16.15.51:5060;branch=z9hG4bK-5b186b5;rport=5060


From: 2224440133 <sip:2224440133 at cl1.glphone.com>;tag=cff8d63370ff3ed5o0


To: <sip:2224440131 at cl1.glphone.com>;tag=26001139010904


Call-ID: 9b54d80b-81b366dd at 172.16.15.51


CSeq: 101 ACK


Max-Forwards: 15


Contact: 2224440133 <sip:2224440133 at 172.16.15.51:5060>


User-Agent: Linksys/PAP2-3.1.5(LS)


Content-Length: 0


                            

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

 

ACK sip:10.1.10.65;ftag=cff8d63370ff3ed5o0 SIP/2.0

Record-Route: <sip:10.1.10.65;ftag=cff8d63370ff3ed5o0;lr=on>

Record-Route: <sip:10.1.10.65;ftag=cff8d63370ff3ed5o0;lr=on>

Record-Route: <sip:10.1.10.65;ftag=cff8d63370ff3ed5o0;lr=on>

Via: SIP/2.0/UDP 10.1.10.65;branch=0

Via: SIP/2.0/UDP 10.1.10.65;branch=0

Via: SIP/2.0/UDP 10.1.10.65;branch=0

Via: SIP/2.0/UDP 172.16.15.51:5060;branch=z9hG4bK-5b186b5;rport=5060

From: 2224440133 <sip:2224440133 at cl1.glphone.com>;tag=cff8d63370ff3ed5o0

To: <sip:2224440131 at cl1.glphone.com>;tag=26001139010904

Call-ID: 9b54d80b-81b366dd at 172.16.15.51

CSeq: 101 ACK

Max-Forwards: 14

Contact: 2224440133 <sip:2224440133 at 172.16.15.51:5060>

User-Agent: Linksys/PAP2-3.1.5(LS)

Content-Length: 0

 

I put some debug messages in rr and this is what I get:

 

DEBUG: -ramin- modules/rr/loose_route: jumping to after_strict

after_strict: No next URI found  

 

It seems as if the after_strict is invoked and it can not find the next
URI!

 

Can you please tell me why SER can not route this properly!

 

Thank you so much for your kind help

 

ramin

 

 

 

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