[Ecn-sane] [Cake] The two SCE tests I have in mind

[Dave Taht]

On Mon, Apr 1, 2019 at 6:03 PM Stephen Hemminger
<stephen at networkplumber.org> wrote:
>
> On Sun, 24 Mar 2019 13:32:03 +0100
> Michael Richardson <mcr at sandelman.ca> wrote:
>
> > Jonathan Morton <chromatix99 at gmail.com> wrote:
> >     >> On 24 Mar, 2019, at 12:05 pm, Pete Heist <pete at 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 :-)

Well, I still have nothing better than tcptrace + xplot.

> >
> > 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.
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Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-205-9740