I believe you are right. I think I have found the issue in the Asterisk code.
Thanks! Carl
On 05/25/2011 01:01 PM, Iñaki Baz Castillo wrote:
2011/5/25 Carl Wagnercarl.wagner@verbalworld.com:
I am sorry, you are right. I was looking at rfc3665 Page 71, F10 and it did not have a To: tag in the 200 OK to the cancel. (I know that rfc3665 is just examples, and when in doubt I should use rfc3261)
The last paragraph of rfc3261, section 9.2 says to use section 8.2.6 to construct the 200 (OK).
Not sure why Asterisk is not liking the 200 Canceling. Does anyone see anything wrong with the Cancel or the 200 Canceling in the log below?
Because Asterisk is buggy and expects (wrongly) that the Totag of the CANCEL must match the Totag of a previously received 1XX response. This is of course a wrong assumption as there could be diferent 1XX responses with different Totag (when forking).
I remember that it just occurs if you set Asterisk sip.conf with pendantic-mode enabled.
Asterisk is buggy.