On 7/14/14 7:06 PM, NK wrote:
Hi Paul,
Thanks!!. Yes i checked 3264 and it says it should be increment by 1.
However i am more concerned that if there is re invite and in 200 OK
SDP(in the correspondence of re-invite) there is no change as compare to
previous SDP then also <session-version> should increment by 1?
In this case you certainly may use the same version.
It is less clear if it is valid to increase the version number when the
SDP is not changed. If you MUST NOT increment in this case then you are
obligated to keep track whether it is changed or not, and that may not
always be convenient.
IMO it is not an error to increment when there has been no change. But
others may not agree.
Frankly I think having version number indicate there has been no change
is silly. No experienced programmer will trust this to be correct.
Thanks,
Paul
Regards,
Nitin Kapoor
On Mon, Jul 14, 2014 at 7:02 PM, Paul Kyzivat <pkyzi...@alum.mit.edu
<mailto:pkyzi...@alum.mit.edu>> wrote:
On 7/14/14 6:14 PM, NK wrote:
Dear All,
I have query regarding the Session version in SDP. I know if we
are making
any changes in SDP then from 183 to 200OK with SDP then there
will be
increment in session version from 183 <session version = 1> to
200 OK
<session-version=2>. However i have 2 doubt as below. Can you
please help
me on this.
1) Is that Value should be increment by 1 only? I mean suppose
in 183
w/SDP we have Session Version =1 , then is that mandatory that
we should
have "session-version=2" or it can be 3 directly. OR
2) if in 183 w/SDP and 200 Ok we had the same value but when
"re-invite
happened then SDP was same but "session-version" value
incremented from 1
==>3 directly. I feel it should be 2 (i mean increment by 1
only). Please
advise if my understanding is correct.
RFC 3264 requires that it be incremented by 1. But if you are on the
receiving side I suggest you be lenient about this.
Thanks,
Paul
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