Re: I-D Action:draft-ietf-tsvwg-sctp-strrst-09.txt
Randy Stewart <randall@lakerest.net> Wed, 09 February 2011 16:18 UTC
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Subject: Re: I-D Action:draft-ietf-tsvwg-sctp-strrst-09.txt
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From: Randy Stewart <randall@lakerest.net>
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Date: Wed, 09 Feb 2011 11:18:35 -0500
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To: "t.petch" <ietfc@btconnect.com>
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Tom: Just to let you know I did NOT forget about this... Here is the text that is waiting in the xml for the -10 revision: *********************************************************** When a peer endpoint requests a Incoming SSN Reset Request it is possible that the local endpoint has just sent an Outgoing SSN Reset Request on the same stream and has not yet received a response. In such a case the local endpoint MUST do the following: 1) If the stream reset overlaps the outstanding request completely respond to the requestor with an acknowledgment indicating that there was 'Nothing to do'. 2) Otherwise process the stream reset request normally responding to the requestor with an acknowledgment. It is also possible that the Incoming request will arrive after the Outgoing SSN Reset Request just completed. In such a case the local endpoint MUST do the following: 1) If the stream reset overlaps the outstanding request completely all of the streams being requested will be already set to 0. If so, the local endpoint SHOULD send back a Stream Reset Response with the success code "Nothing to do". 2) Otherwise process the stream reset request normally responding to the requestor an acknowledgment. Note that in either race condition the local endpoint could optionally also perform the reset. This would result in streams that are already at sequence 0 being reset again to 0 which would cause no harm to the application but will add an extra message to the network. Note also that in any of the race conditions listed above the receiver MUST NOT send more than one response. In other words two responses MUST NOT be sent for the same request. ******************************************************************* When we get any other comments after LC I will issue the updated draft with the above... If you would like further changes or this does not satisfy your comments below let me know.. you can even send suggested text :-) Best wishes R On Jan 15, 2011, at 6:49 AM, t.petch wrote: > I like the change to 5.2.3 but think that it needs to go further. > > -08 split out two cases, > > Incoming SSN Reset Request received but no response yet to the Outgoing request > Incoming SSN Reset Request received after response to the Outgoing request > > assuming that the Incoming and Outgoing requests have overlapping stream > numbers. > > -09 subdivides the first case into overlaps completely and overlaps partially > but > I think that the second case is also in need of subdivision in the same way. > > And, a point of clarification, in any of the four cases, is it required to send > just > the one response, ie you cannot send two responses in the partial overlap case, > one saying no-op and the will do (or won't do!)? > > > Tom Petch > ----- Randall Stewart randall@lakerest.net
- I-D Action:draft-ietf-tsvwg-sctp-strrst-08.txt Internet-Drafts
- Re: I-D Action:draft-ietf-tsvwg-sctp-strrst-08.txt t.petch
- Re: I-D Action:draft-ietf-tsvwg-sctp-strrst-08.txt Randy Stewart
- Re: I-D Action:draft-ietf-tsvwg-sctp-strrst-08.txt t.petch
- Re: I-D Action:draft-ietf-tsvwg-sctp-strrst-08.txt Randy Stewart
- Re: I-D Action:draft-ietf-tsvwg-sctp-strrst-08.txt t.petch
- Re: I-D Action:draft-ietf-tsvwg-sctp-strrst-08.txt Randy Stewart
- I-D Action:draft-ietf-tsvwg-sctp-strrst-09.txt t.petch
- Re: I-D Action:draft-ietf-tsvwg-sctp-strrst-09.txt Randy Stewart