Hi All, I have a query related to Spiral Scenario for CANCEL which is a hop by hop request.
Scenario: User Agent 1(UA1) Forward the INVITE to PROXY1. PROXY1 forked it to 2 locations UA2 and PROXY2. PROXY2 Forwards the INVITE to PROXY1 again (INVITE is a Spiral request on Proxy 1). Proxy1 forwards it to UA3. UA3 and UA2 ringing and 180 received by Proxy1. UA2 picks Up the call and sends 200 OK to Proxy1. Proxy1 Generates CANCEL for other Location (in our Case Proxy2) and forwards to Proxy2. Proxy2 responses with 200 OK (as CANCEL is hop by hop request) to Proxy1 and forwards the CANCEL to Proxy1 for forwarding CANCEL to UA3. Question: How will PROXY1 will come to know that CANCEL received from PROXY2 is for Spiral request and it should be forwarded to UA3. Thanks and Regards Ashish _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
