[asterisk-dev] SIP race condition with directmedia and sendrpid?

[Kevin P. Fleming]

On 08/06/2011 06:40 AM, Henning Holtschneider wrote:

> - - it's acceptable for Asterisk to send the second re-INVITE without waiting for the first to be OK'd be the phone,

No, it's not. This is probably being caused by the lack of a full 
transaction layer in chan_sip.

> - - it's acceptable for the phone to send a 500 Internal Server Error. From my understanding, a 491 Request Pending would be more appropriate *if* the second re-INVITE is valid.

'491 Request Pending' would be the appropriate response, although 
there's nothing particularly wrong with the phone sending a 500 response 
if the session is completely broken because of the overlapping INVITE 
requests.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
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