Hi All
Consider the following scenario:
UA 1 B2BUA UA2
Invite (From tag F1)
--------------------------------->
Invite (From tag F2)
---------------------------------->
200 OK (From tag F2, To tag F2)
<---------------------------------
200 OK (From tag F1,
To tag F3)
<-------------------------------
ACK (From tag F1,
To tag F3)
------------------------------->
ACK (From tag F2,
To tag F2)
---------------------------------->
RTP
<------------------------------------------------------------------>
BYE (From tag F2, To tag F2,
To and From headers reversed)
<----------------------------------
481
---------------------------------->
As per Section 19.3 of RFC 3261,
"When a tag is generated by a UA for insertion into a request or response, it
MUST be globally unique and
cryptographically random with at least 32 bits of randomness"
Now, is the B2BUA right in rejecting the BYE with a 481. Can the 200 ok from
UA2 have same To and From tags? What should the B2BUA do:
1. On receiving the 200 OK?
2. On receiving the BYE?
Regards,
Tarun Gupta
Aricent
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