From: Stephen Hemminger <stephen@networkplumber.org>
To: Michael Richardson <mcr@sandelman.ca>
Cc: Jonathan Morton <chromatix99@gmail.com>,
Cake List <cake@lists.bufferbloat.net>,
ecn-sane@lists.bufferbloat.net
Subject: Re: [Ecn-sane] [Cake] The two SCE tests I have in mind
Date: Mon, 1 Apr 2019 09:02:58 -0700 [thread overview]
Message-ID: <20190401090258.144ff939@shemminger-XPS-13-9360> (raw)
In-Reply-To: <11555.1553430723@dooku.sandelman.ca>
On Sun, 24 Mar 2019 13:32:03 +0100
Michael Richardson <mcr@sandelman.ca> wrote:
> Jonathan Morton <chromatix99@gmail.com> wrote:
> >> On 24 Mar, 2019, at 12:05 pm, Pete Heist <pete@heistp.net> wrote:
> >>
> >> tcpdump -r file.pcap udp port 2112 and greater 80 and "ip[1] != 0x1”
> >>
> >> “greater 80” ignores the handshake packets and 0x1 is whatever TOS
> >> value we want to make sure the packets contain. We can use different
> >> filters for other traffic.
>
> > Bear in mind that the TOS byte contains ECN as well as DSCP fields, and
> > the latter is left-justified.
>
> libpcap should probably learn about DSCN bits to avoid people having to
> think so much :-)
>
> Send patches to me/github.
>
Libpcap is ancient history by now. It is like ifconfig, everyone still can't reprogram
their brain; but the tool is on life support.
All development is happening on wireshark/tshark.
next prev parent reply other threads:[~2019-04-01 16:03 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAA93jw5bsQLo0QJbE0cke-mgr9DwEYM0F9E-RYmGqSTWFe+qrA@mail.gmail.com>
[not found] ` <CAB6BA96-AF64-4A16-A5D2-2EAD065F303A@darbyshire-bryant.me.uk>
[not found] ` <3F3F78F9-8F97-42F2-9005-F8449489BECF@gmail.com>
[not found] ` <CAA93jw6BMggHXcYoqfFS2e0iuB54iMr+q+BWv720Z4zfaMb5gw@mail.gmail.com>
[not found] ` <42B7B2FB-94FC-4CA6-B75E-CADB61FE3173@gmail.com>
[not found] ` <6047E899-078F-4E08-A29C-B87D268A4E5E@heistp.net>
[not found] ` <69EA569B-4AD2-4C4B-937B-9ABDD563B120@gmail.com>
2019-03-24 8:55 ` [Ecn-sane] " Dave Taht
2019-03-24 9:30 ` [Ecn-sane] [Cake] " Luca Muscariello
2019-03-24 10:30 ` Dave Taht
2019-03-24 12:33 ` Dave Taht
2019-03-24 22:31 ` Sebastian Moeller
2019-03-24 11:05 ` [Ecn-sane] " Pete Heist
2019-03-24 11:08 ` Jonathan Morton
2019-03-24 11:21 ` Pete Heist
2019-03-24 12:32 ` Michael Richardson
2019-04-01 16:02 ` Stephen Hemminger [this message]
2019-04-01 17:21 ` [Ecn-sane] [Cake] " Dave Taht
2019-04-02 13:36 ` Rodney W. Grimes
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