From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm1-x343.google.com (mail-wm1-x343.google.com [IPv6:2a00:1450:4864:20::343]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 5A74B3B2A4 for ; Sat, 7 Sep 2019 09:09:55 -0400 (EDT) Received: by mail-wm1-x343.google.com with SMTP id q19so9106335wmc.3 for ; Sat, 07 Sep 2019 06:09:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=heistp.net; s=google; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=TmUARQxIvFvc8FqNspoHnFyFO6SodT7m/Tm68jY28qM=; b=iEkJzCRU/7sMemeR9rWVjCyIfREGiP9bNJ7oZKdhLHadzq0fIFJrck47DyYZzCt+tQ q+xCNiM8QXvGO9JckJ21k7l7fOZD8C2X13W+P8oMkuv2IlnUAnxQAEdzZy95SequtA5i PbLu/Na0fbSWfa1KrAtP8wD45wpHksrwT7coMsUKVMKBSRMYP42PcOZlChvKV28KTVrf CxF2DrQJ9THxDjHXZ+SL+nHuNYRpMLfX+mvhHebao3KeXSM2nt4nidLsKTYL755KQB5l 7wEffG2kEnykKCSpLIviM84UevlxhK57geBFpjiJh5c6SoDBB79epyJ5YwmCg0qm7p++ bN0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=TmUARQxIvFvc8FqNspoHnFyFO6SodT7m/Tm68jY28qM=; b=fnf9QwoK8O5YHsmLKrN6Bm88ZMsQw5LO++uEZrQbaNT7X8IXib1Wk4hVktSA7A0rpt mScrrZ8+VtlnhhutaNNLgKecu3hFMciLa16NZvQOpufsMejHNAKQ8Cshd3HOTPRwg0pK z2qLHQmHj0wxdCtIJ14SFpoE/KUt/xfr5svhVnMwjwQghOCHr3hZZohIvjjs7bmBQhyc 9UjfNiks2BWTkJ8/QswIFwSS9TM9z5lDDglQMeVT82V/Pugm+DnfPeUg8Pbci3/mVhxu n2NXC8U5/kL59ElsCQPfNw/KaE+1IjwFYiHUTKNybHDr+7ejBVYFAGyG6nKU9ZcxUj6t d6fg== X-Gm-Message-State: APjAAAWg1dWKvXh3SkEAQD+h+C8blzGUI/9rAk8re9yjEFsK3ZHKrMma wm7KdHMt6nDAYmuEbVpictfDZA== X-Google-Smtp-Source: APXvYqzucqi3b18YYrW9nMPqaVW4/QaFvlZzzd0CsN58RViVEOuog+kolSSfpWcit7pQ8NHdabZU0w== X-Received: by 2002:a1c:a8cb:: with SMTP id r194mr11205945wme.156.1567861794570; Sat, 07 Sep 2019 06:09:54 -0700 (PDT) Received: from yoda.luk.heistp.net (h-1169.lbcfree.net. [185.193.85.130]) by smtp.gmail.com with ESMTPSA id p4sm6405451wrs.6.2019.09.07.06.09.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 07 Sep 2019 06:09:54 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) From: Pete Heist In-Reply-To: <182F72BE-7448-4F59-AD4D-64267D0721ED@gmx.de> Cc: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= , bloat@lists.bufferbloat.net, Matt Taggart , cerowrt-devel Content-Transfer-Encoding: quoted-printable Message-Id: <9DEC00AC-CE2B-400A-AF78-FCAD6F14E47C@heistp.net> References: <874l1p25ka.fsf@toke.dk> <63E4F227-7BC3-4238-B3F2-8B57118AAFD1@gmx.de> <87ef0tz4p2.fsf@toke.dk> <875zm5yr8m.fsf@toke.dk> <87lfv1xbmk.fsf@toke.dk> <5D47BF2C-025A-46F0-857C-B2EB673ED798@heistp.net> <182F72BE-7448-4F59-AD4D-64267D0721ED@gmx.de> To: Sebastian Moeller X-Mailer: Apple Mail (2.3445.9.1) X-Mailman-Approved-At: Mon, 30 Mar 2020 07:21:14 -0400 Subject: Re: [Cerowrt-devel] [Bloat] Ubiquiti Launches a Speed Test Network X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Date: Sat, 07 Sep 2019 13:09:55 -0000 X-Original-Date: Sat, 7 Sep 2019 15:09:52 +0200 X-List-Received-Date: Sat, 07 Sep 2019 13:09:55 -0000 > On Sep 7, 2019, at 2:02 PM, Sebastian Moeller wrote: >=20 > Hi Pete, >=20 > If the PayPal ad of an irtt packet would contain the requested DSCP as = ascci string (maybe starting with a string like "DSCP: 46: 101110 (EF)" = in the first few bytes of the payload would make confirming = bleaching/remapping from packetdumps relatively convenient, say just by = looking at a packet in Wireshark and comparing the IP headers DSCP value = with the string in the payload. Sure that is not automated, but would be = great in at least allowing to test for bleaching in the packets received = from a irtt server.... >=20 > But, as much as I would like that feature, I believe the total = audience will be quite small.... >=20 > Best Regards > Sebastian You probably noticed, but it=E2=80=99s possible to fill the whole = payload with the dscp byte, although the server has to allow that to put = it in replies (requests can always contain it), for example: irtt server --allow-fills=3D=E2=80=9C*" irtt client --dscp=3D0x10 -l 256 --fill=3Dpattern:10 --sfill=3Dpattern:10 = localhost If you still want the payload to be mostly random, I could potentially = add a new fill mode which fills first with some arbitrary bytes (or a = string) then the rest is random. I think in the case of flent, the irtt = runner fills with random, but this only applies when there=E2=80=99s = actually a payload (i.e. for the voip tests).=