Hello,
The next figure describes my problem.
openSIPS
+------+
-- INVITE(1) -->| |--- INVITE(1) -->
| |
-- INVITE(2) -->| |--- INVITE(2) -->
<-- 180(2) ------| |<-- 180(2) ------
<-- 200(2) ------| |<-- 200(2) ------
| |
-- CANCEL(1) -->| |
<-- 200(CANCEL) -| |
<-- 487(1) ------| |
-- ACK(1) ----->| |
| |
-- ACK(2) ----->| |--- ACK(2) ----->
| |
+------+
|
|
+------+
| |
| |
+------+
RTP proxy
I use RTP proxy to relay media streams.
INVITE (1) and (2) have been forked from an upstream proxy, thus they have
the same Call-ID and From tag, and a different branch ID.
INVITE (2) is accepted, but INVITE (1) has no response.
The upstream proxy cancels INVITE (1).
In my script, on CANCEL(1) request I close the RTP session, but I should not
dot that since INVITE(2) has been accepted.
My questions are:
How can I know when I received CANCEL(1) that INVITE(2) has been accepted?
Do I need to use flags? Which ones ?
Thanks for any help,
Yannick
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