From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from korolev.univ-paris7.fr (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id F15ED21F310 for ; Mon, 22 Jun 2015 14:08:45 -0700 (PDT) Received: from potemkin.univ-paris7.fr (potemkin.univ-paris7.fr [IPv6:2001:660:3301:8000::1:1]) by korolev.univ-paris7.fr (8.14.4/8.14.4/relay1/56100) with ESMTP id t5ML8hF5028847 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 22 Jun 2015 23:08:43 +0200 Received: from mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [81.194.30.253]) by potemkin.univ-paris7.fr (8.14.4/8.14.4/relay2/56228) with ESMTP id t5ML8hDP005553; Mon, 22 Jun 2015 23:08:43 +0200 Received: from mailhub.math.univ-paris-diderot.fr (localhost [127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTP id 476A661FA2; Mon, 22 Jun 2015 23:08:43 +0200 (CEST) X-Virus-Scanned: amavisd-new at math.univ-paris-diderot.fr Received: from mailhub.math.univ-paris-diderot.fr ([127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id 3KVyAI9kdljJ; Mon, 22 Jun 2015 23:08:42 +0200 (CEST) Received: from pirx.pps.univ-paris-diderot.fr (unknown [78.194.40.74]) (Authenticated sender: jch) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTPSA id 1D1F761FA1; Mon, 22 Jun 2015 23:08:42 +0200 (CEST) Date: Mon, 22 Jun 2015 23:08:42 +0200 Message-ID: <87d20nmox1.wl-jch@pps.univ-paris-diderot.fr> From: Juliusz Chroboczek To: Dave Taht In-Reply-To: References: <87wpyx3wnc.wl-jch@pps.univ-paris-diderot.fr> User-Agent: Wanderlust/2.15.9 MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; format=flowed; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]); Mon, 22 Jun 2015 23:08:43 +0200 (CEST) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (potemkin.univ-paris7.fr [194.254.61.141]); Mon, 22 Jun 2015 23:08:43 +0200 (CEST) X-Miltered: at korolev with ID 5588795B.000 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-Miltered: at potemkin with ID 5588795B.000 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-j-chkmail-Enveloppe: 5588795B.000 from potemkin.univ-paris7.fr/potemkin.univ-paris7.fr/null/potemkin.univ-paris7.fr/ X-j-chkmail-Enveloppe: 5588795B.000 from mailhub.math.univ-paris-diderot.fr/mailhub.math.univ-paris-diderot.fr/null/mailhub.math.univ-paris-diderot.fr/ X-j-chkmail-Score: MSGID : 5588795B.000 on korolev.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Score: MSGID : 5588795B.000 on potemkin.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Status: Ham X-j-chkmail-Status: Ham Cc: bloat Subject: Re: [Bloat] BitTorrent and IPv6 [was: tackling torrent...] X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Jun 2015 21:09:14 -0000 > It also appeared to show that transmission chose one and only one > of the ipv6 addresses available on this box. Yes. My code explicitly binds the UDPv6 socket to a single address. Anything else, and the IPv6 DHT gets confused since Kademlia requires having a single address for all peers. We could in principle use the kernel's address selection for outgoing µTP connections. We could even announce multiple addresses over Kademlia, but that would require a fair amount of work. > This is me capturing the last 30 seconds of an ubuntu download: > http://snapon.lab.bufferbloat.net/~d/withtorrents/last30secondsoftorrentvs1upload.png Nice. (Interesting how the "endgame" algorithm causes the download throughput to explode.) > 6969 was the most common inbound port. It's the default, but aficionados tend to choose a random high port, in case 6969 is blocked or throttled. >> 4. Most importantly, I've implemented IPv6 support for the DHT (BEP-32) [1]. >> BEP-32 is now implemented by Transmission, Vuze, Tixati, KTorrent and >> Shareaza. > > In light of source specific routing, perhaps that BEP needs an addendum. I'm no longer actively working on BitTorrent, just maintaining libdht in my copious free time. Place aux jeunes. -- Juliusz