Re: [DNSOP] I-D Action: draft-ietf-dnsop-dns-capture-format-01.txt

Bob Harold <rharolde@umich.edu> Thu, 23 February 2017 18:58 UTC

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From: Bob Harold <rharolde@umich.edu>
Date: Thu, 23 Feb 2017 13:58:18 -0500
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To: Sara Dickinson <sara@sinodun.com>
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Subject: Re: [DNSOP] I-D Action: draft-ietf-dnsop-dns-capture-format-01.txt
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On Tue, Feb 21, 2017 at 6:39 AM, Sara Dickinson <sara@sinodun.com> wrote:

> Hi All,
>
> This update to the draft tries to address the recent comments:
>
> * Many editorial improvements by Paul Hoffman
>
> * Included discussion of malformed packet handling
>
> * Improved Appendix C on Comparison of Binary Formats
>
> * Now using C-DNS field names in the tables in section 8
>
> * A handful of new fields included (CDDL updated)
>
> * Timestamps now include optional picoseconds
>
> * Added details of block statistics
>
> Regards
>
> Sara.
>
> > On 21 Feb 2017, at 11:36, internet-drafts@ietf.org wrote:
> >
> >
> > A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> > This draft is a work item of the Domain Name System Operations of the
> IETF.
> >
> >        Title           : C-DNS: A DNS Packet Capture Format
> >        Authors         : John Dickinson
> >                          Jim Hague
> >                          Sara Dickinson
> >                          Terry Manderson
> >                          John Bond
> >       Filename        : draft-ietf-dnsop-dns-capture-format-01.txt
> >       Pages           : 48
> >       Date            : 2017-02-21
> >
> > Abstract:
> >   This document describes a data representation for collections of DNS
> >   messages.  The format is designed for efficient storage and
> >   transmission of large packet captures of DNS traffic; it attempts to
> >   minimize the size of such packet capture files but retain the full
> >   DNS message contents along with the most useful transport metadata.
> >   It is intended to assist with the development of DNS traffic
> >   monitoring applications.
> >
> >
> > The IETF datatracker status page for this draft is:
> > https://datatracker.ietf.org/doc/draft-ietf-dnsop-dns-capture-format/
> >
> > There's also a htmlized version available at:
> > https://tools.ietf.org/html/draft-ietf-dnsop-dns-capture-format-01
> >
> > A diff from the previous version is available at:
> > https://www.ietf.org/rfcdiff?url2=draft-ietf-dnsop-dns-capture-format-01
> >
> >
> > 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/
> >
>
>
Is it possible to have a case where the software does not know if
promiscuous mode was enabled ?  If so, we should allow for an "unspecified"
or "unknown" code for "promisc"

Perhaps a pcap to C-DNS converter would have this issue, if the pcap format
does not include "promisc" info?

-- 
Bob Harold