On 01 Nov (07:31:50), Ian Goldberg wrote: > On Wed, Nov 01, 2017 at 02:28:03PM +1100, teor wrote: > > > > > On 31 Oct 2017, at 06:57, David Goulet <dgoulet@xxxxxxxxx> wrote: > > > > > > * I believe now that we should seriously discuss the relevance of channels. > > > Originally, the idea was good that is providing an abstraction layer for the > > > relay to relay handshake and send/process cells related to the protocol. But, > > > as of now, they are half doing it. > > > > > > There is an important cost in code and maintanance of something that is not > > > properly implemented/finished (channel abstraction) and also something that > > > is unused. An abstraction implemented only for one thing is not really useful > > > except maybe to offer an example for others? But we aren't providing a good > > > example right now imo... > > > > > > That being said, we can spend time fixing the channel subsystem, trying to > > > turn it in a nicer interface, fixing all the issues I've described above (and > > > I suspect there might be more) so the cell scheduler can play nicely with > > > channels. Or, we could rip them off eliminating lots of code and reducing our > > > technical debt. I would like us to think about what we want seriously because > > > that channel subsystem is _complicated_ and very few of us fully understands > > > it afaict. > > > > It depends what the goal of the channel layer is. > > > > Do we seriously think we will use another protocol in place of TLS? > > The channel layer has certainly been used fruitfully in the past for > experiments with other transports, such as UDP-based ones, QUIC-Tor, > etc. I would be a little sad to see it disappear completely. So after Montreal meeting, I got access to QUIC-Tor code. And, as a misconception of channels, they aren't about "transport" but "protocol". Thus the QUIC-Tor code didn't even *touch* channels ;). Everything they did had to be done mostly at the connection layer. For some reasearch to experiement with channels, it would be basically a research based on _removing_ TLS between relays. I'm not aware of such a thing right now but I'm sure someone did poked at it for sure! Cheers! David > -- > Ian Goldberg > Professor and University Research Chair > Cheriton School of Computer Science > University of Waterloo > _______________________________________________ > tor-dev mailing list > tor-dev@xxxxxxxxxxxxxxxxxxxx > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev -- UPl9eGJV+i+xjpXGu3Z4MvZvCwpXqUVr4EtQNSNE19w=
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