From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-x22c.google.com (mail-lf0-x22c.google.com [IPv6:2a00:1450:4010:c07::22c]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id BEDCD21F60F for ; Fri, 23 Oct 2015 06:29:54 -0700 (PDT) Received: by lffz202 with SMTP id z202so83711969lff.3 for ; Fri, 23 Oct 2015 06:29:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=sY3IU0oAcWi6s0OlknWBP8EQgbdC4LmXFKtuQX/54ps=; b=vVconhNWXh0bBxZ2keCfMBFoZ8DZd2a79ANoKrn9NsXLx5g7Xa3S0EjQUOlWqC5c+r d85uS5xBqEDs3xUmNnvL+7DITclL9XAVslc02X0e1qBIjHymkXFEAP1WPO5d5V5Anqpa sCZHjJ8+T+OxDrQFsqRUiTbNBYRG0GpYPDeZc2DtuTAoggEtcjruaZS9YBYYoJNR9gYZ rINjsVse5twlqJIgPWelhshhhNTWFf9tQ6ak8UGxqyDPPBTi3B9USXPAlcN5PTEsVov+ xZKb0tlG9cz6QQ7ydMGr1I+/NDWam+YxPLXYKzuN1P6QwMTuZbaJeyhWlFrUd0zFwQ5I bkFg== X-Received: by 10.25.208.141 with SMTP id h135mr7469155lfg.81.1445606992178; Fri, 23 Oct 2015 06:29:52 -0700 (PDT) Received: from bass.home.chromatix.fi (87-95-20-216.bb.dnainternet.fi. [87.95.20.216]) by smtp.gmail.com with ESMTPSA id o137sm3305922lfe.31.2015.10.23.06.29.46 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 23 Oct 2015 06:29:51 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: Jonathan Morton In-Reply-To: Date: Fri, 23 Oct 2015 16:29:28 +0300 Content-Transfer-Encoding: quoted-printable Message-Id: References: <5627B90D.8070106@alvestrand.no> <43B59C2F-4B64-4318-8339-04903AF2A6AC@cisco.com> <34EEB0FF-1922-42B5-A778-9BB66B7C4FDC@csperkins.org> To: Justin Uberti X-Mailer: Apple Mail (2.2104) Cc: "Pal Martinsen \(palmarti\)" , "aqm@ietf.org" , "cake@lists.bufferbloat.net" , "rmcat@ietf.org" , "rtcweb@ietf.org" , Colin Perkins Subject: Re: [Cake] [rmcat] [rtcweb] Catching up on diffserv markings X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Oct 2015 13:30:17 -0000 > On 22 Oct, 2015, at 22:54, Justin Uberti wrote: >=20 > At present I'm not aware of any widely-deployed OS where an app can = read the received ECN markings.=20 I have personally verified that this is possible (for UDP) on Linux - we = were investigating the feasibility of adding ECN to uTP (ie. = BitTorrent). The code looks horrid, but what raw sockets code = doesn=E2=80=99t? - Jonathan Morton