Re: [tram] I-D Action: draft-ietf-tram-turnbis-15.txt

"Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com> Tue, 27 March 2018 14:30 UTC

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From: "Konda, Tirumaleswar Reddy" <TirumaleswarReddy_Konda@McAfee.com>
To: Noriyuki Torii <torii0573@gmail.com>
CC: "tram@ietf.org" <tram@ietf.org>
Thread-Topic: [tram] I-D Action: draft-ietf-tram-turnbis-15.txt
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Date: Tue, 27 Mar 2018 14:29:54 +0000
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Subject: Re: [tram] I-D Action: draft-ietf-tram-turnbis-15.txt
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Thanks Noriyuki Torii, addressed the comments in the new revision.

Cheers,
-Tiru

> -----Original Message-----
> From: Noriyuki Torii [mailto:torii0573@gmail.com]
> Sent: Monday, March 19, 2018 6:29 AM
> To: Konda, Tirumaleswar Reddy <TirumaleswarReddy_Konda@McAfee.com>
> Cc: tram@ietf.org
> Subject: Re: [tram] I-D Action: draft-ietf-tram-turnbis-15.txt
> 
> Hi Tiru,
> 
> I checked updated I-D and found some more points in section 12 below.
> 
> >      0x4000 through 0x4FFF: These values are the allowed channel
> >      numbers (16,384 possible values).
>                 ~~~~~~
> This value also need to be amended to 4,096.
> 
> >      0x8000 through 0xFFFF: These values are reserved for future use.
> 
> This line can be removed now because the previous sentence imply it, too.
> 
> And also, I think it may be preferable if the following paragraph is updated so as
> to alignment to RFC 7983.
> 
> >   Because of this division, ChannelData messages can be distinguished
> >   from STUN-formatted messages (e.g., Allocate request, Send
> >   indication, etc.) by examining the first two bits of the message:
> >
> >      0b00: STUN-formatted message (since the first two bits of a STUN-
> >      formatted message are always zero).
> >
> >      0b01: ChannelData message (since the channel number is the first
> >      field in the ChannelData message and channel numbers fall in the
> >      range 0x4000 - 0x7FFF).
> >
> >      0b10: Reserved
> >
> >      0b11: Reserved
> >
> >   The reserved values may be used in the future to extend the range of
> >   channel numbers.  Thus, an implementation MUST NOT assume that a TURN
> >   message always starts with a 0 bit.
> 
> I guess it could be
> 
>     According to RFC 7983, ChannelData messages can be distinguished
>     from other multiplexed protocols by examining the first byte of the
>     message:
> 
>           [0..3]  STUN
>         [16..19]  ZRTP
>         [20..63]  DTLS
>         [64..79]  TURN Channel
>       [128..191]  RTP/RTCP
>           others  reserved, MUST be dropped and an alert MAY be logged
> 
>     Reserved values may be used in the future by other protocols.
>     Thus, an implementation MUST comply the discrimination above.
> 
> 
> Finally, in section 18, the example Refresh request in the diagram of the page 67
> doesn't have the PASSWORD-ALGORITHMS attribute nevertheless it has the
> PASSWORD-ALGORITHM attributes, also need to be fixed.
> 
> Regards,
> Noriyuki Torii
> 
> ----------------
> 
> 2018-03-18 17:50 GMT+09:00 Konda, Tirumaleswar Reddy
> <TirumaleswarReddy_Konda@mcafee.com>:
> > This revision addresses comments from Mark, Karl and Noriyuki Torii.
> >
> > -Tiru
> >
> >> -----Original Message-----
> >> From: tram [mailto:tram-bounces@ietf.org] On Behalf Of internet-
> >> drafts@ietf.org
> >> Sent: Sunday, March 18, 2018 8:43 AM
> >> To: i-d-announce@ietf.org
> >> Cc: tram@ietf.org
> >> Subject: [tram] I-D Action: draft-ietf-tram-turnbis-15.txt
> >>
> >>
> >> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> >> This draft is a work item of the TURN Revised and Modernized WG of
> >> the IETF.
> >>
> >>         Title           : Traversal Using Relays around NAT (TURN): Relay Extensions
> >> to Session Traversal Utilities for NAT (STUN)
> >>         Authors         : Tirumaleswar Reddy
> >>                           Alan Johnston
> >>                           Philip Matthews
> >>                           Jonathan Rosenberg
> >>       Filename        : draft-ietf-tram-turnbis-15.txt
> >>       Pages           : 84
> >>       Date            : 2018-03-18
> >>
> >> Abstract:
> >>    If a host is located behind a NAT, then in certain situations it can
> >>    be impossible for that host to communicate directly with other hosts
> >>    (peers).  In these situations, it is necessary for the host to use
> >>    the services of an intermediate node that acts as a communication
> >>    relay.  This specification defines a protocol, called TURN (Traversal
> >>    Using Relays around NAT), that allows the host to control the
> >>    operation of the relay and to exchange packets with its peers using
> >>    the relay.  TURN differs from some other relay control protocols in
> >>    that it allows a client to communicate with multiple peers using a
> >>    single relay address.
> >>
> >>    The TURN protocol was designed to be used as part of the ICE
> >>    (Interactive Connectivity Establishment) approach to NAT traversal,
> >>    though it also can be used without ICE.
> >>
> >>    This document obsoletes RFC 5766 and RFC 6156.
> >>
> >>
> >> The IETF datatracker status page for this draft is:
> >> https://datatracker.ietf.org/doc/draft-ietf-tram-turnbis/
> >>
> >> There are also htmlized versions available at:
> >> https://tools.ietf.org/html/draft-ietf-tram-turnbis-15
> >> https://datatracker.ietf.org/doc/html/draft-ietf-tram-turnbis-15
> >>
> >> A diff from the previous version is available at:
> >> https://www.ietf.org/rfcdiff?url2=draft-ietf-tram-turnbis-15
> >>
> >>
> >> Please note that it may take a couple of minutes from the time of
> >> submission until the htmlized version and diff are available at tools.ietf.org.
> >>
> >> Internet-Drafts are also available by anonymous FTP at:
> >> ftp://ftp.ietf.org/internet-drafts/
> >>
> >> _______________________________________________
> >> tram mailing list
> >> tram@ietf.org
> >> https://www.ietf.org/mailman/listinfo/tram
> >
> > _______________________________________________
> > tram mailing list
> > tram@ietf.org
> > https://www.ietf.org/mailman/listinfo/tram