From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1UJLuD-0006wi-8B for bitcoin-development@lists.sourceforge.net; Sat, 23 Mar 2013 10:42:33 +0000 X-ACL-Warn: Received: from nm21.bullet.mail.bf1.yahoo.com ([98.139.212.180]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1UJLuC-0002QU-1Q for bitcoin-development@lists.sourceforge.net; Sat, 23 Mar 2013 10:42:33 +0000 Received: from [98.139.212.150] by nm21.bullet.mail.bf1.yahoo.com with NNFMP; 23 Mar 2013 10:42:26 -0000 Received: from [98.139.212.209] by tm7.bullet.mail.bf1.yahoo.com with NNFMP; 23 Mar 2013 10:42:26 -0000 Received: from [127.0.0.1] by omp1018.mail.bf1.yahoo.com with NNFMP; 23 Mar 2013 10:42:26 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 560021.31951.bm@omp1018.mail.bf1.yahoo.com Received: (qmail 31306 invoked by uid 60001); 23 Mar 2013 10:42:26 -0000 X-YMail-OSG: QIxf.w4VM1lxwdu44VFTr5OvytMiOU24tf7Gny8zZL3ksXv 1jCRdIh5DA0G7CiOjxkYbrHyAkWqC94xUvH8LF0nmOuEy6LjWM1IgkPdBrFC fMLGy3a14Vjki3VGnVXCd9UqSdRuV37VtT4tUzFNdjZbzO8ME.jqm4Fdeqt6 WlWS0Ragrgoa90V8x6E4usGXbFaZ3dOUS3_fnRHVwBofEVZy.nWsD4zVNCnf LFpWnf6D8zDrItQ.gtKRYZZNInv3agzTwNsNplSgMcN7Q1k1YU7G_AVKjScc ruX9HHh6RtEXe5G2vmptBeA9jROCpi60ow.l9QRoQMI3Q02dg_OfLUXGhaWS V0Xvsr2Dvrl1vmOFpqYAsoHaSYDCbJZi57iDli5hRBNzhwfYYtLcluWyVjAZ VCJ2wL2myPWfOy28SKWPMVHjdagu_fE3t7pKbFJ1pBmaVxBPbD8.lQr2GP5i mTI3FqUCHJ6gdmRN3Azcq7TqThaFMxngsJxHAksO830jPftleJF.jptjA.rv HwoZA_UOVS2byjSfqQenWawWI.Ia1tOvPaly8uKqqLGZp24P4rwp3tNVyE_4 x.9xf7mKgobxUzvfDVDF.m2aLOEOE_2TVHJII5Erm8S30vPUdRcA5NOZNLz4 ShAVA4_CQr3gijJ4RreQvh0_AdcsBaTqb4E5D32hKtMapEbQ_iXJrxjii0EA v7b1FigrdNAPqQ.Ha Received: from [213.144.148.243] by web161601.mail.bf1.yahoo.com via HTTP; Sat, 23 Mar 2013 03:42:26 PDT X-Rocket-MIMEInfo: 002.001, Tm90IGxvb2tlZCBhdCBjb2RlIHlldCwgc29tZSB0aG91Z2h0czoKCjEpIEluIElQdjQgbWF4IFVEUCBkYXRhIHNpemUgaXMgNjU1MDcgYnl0ZXMuCjIpIFdoYXQgYWJvdXQgYmlnIG1lc3NhZ2VzIChibG9jayk_CjMpIEkgdGhpbmsgcmVsYXkgc3BlZWQgY2FuIGJlIGluY3JlYXNlZCBvbmx5IGJ5IHJlZHVjaW5nIG5ldHdvcmsgZGlhbWV0ZXIuIAoKSW50cm9kdWNpbmcgc3VwZXItbm9kZXMgd2l0aCB0aG91c2FuZHMgb2YgY29ubmVjdGVkIHBlZXJzIGNhbiBncmVhdGx5IGhlbHAgaGVyZS4KNCkgVGhlIG9ubHkBMAEBAQE- X-Mailer: YahooMailWebService/0.8.138.524 References: Message-ID: <1364035346.19716.YahooMailNeo@web161601.mail.bf1.yahoo.com> Date: Sat, 23 Mar 2013 03:42:26 -0700 (PDT) From: Randy Willis To: Bitcoin Development In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable X-Spam-Score: -0.1 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (willis.randy[at]ymail.com) -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [98.139.212.180 listed in list.dnswl.org] -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-Headers-End: 1UJLuC-0002QU-1Q Subject: Re: [Bitcoin-development] A bitcoin UDP P2P protocol extension X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list Reply-To: Randy Willis List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 23 Mar 2013 10:42:33 -0000 Not looked at code yet, some thoughts:=0A=0A1) In IPv4 max UDP data size is= 65507 bytes.=0A2) What about big messages (block)?=0A3) I think relay spee= d can be increased only by reducing network diameter. =0A=0AIntroducing sup= er-nodes with thousands of connected peers can greatly help here.=0A4) The = only (IMO) UDP advantage: hole punching. But requirement of active =0A=0ATC= P connection defies it. And hole punching will need protocol extension.=0A5= ) unsolicited tx broadcast will increase traffic of nodes (especially well-= connected)=0Aand less people will run them.=0A=0A=0A---- Original Message -= ----=0A=0AFrom: Jeff Garzik =0ATo: Bitcoin Development= =0ACc: =0ASent: Saturday, March= 23, 2013 7:17 AM=0ASubject: [Bitcoin-development] A bitcoin UDP P2P protoc= ol extension=0A=0AHere is a rough draft implementation of a UDP P2P protoco= l extension=0Afor bitcoin:=0A=0A=A0 =A0 https://github.com/jgarzik/bitcoin/= tree/udp=0A=A0 =A0 http://yyz.us/bitcoin/udp-v0.patch=0A=0AProtocol specif= ication (such that it is):=0A=0A- UDP, bound to same port as TCP P2P (norma= lly 8333)=0A- Active, simultaneous TCP P2P connection required (useful agai= nst DoS=0Aand other attacks)=0A- Same message format as TCP P2P, same pchMe= ssageStart conventions,=0Aetc. (my CNetMessage pull req would be helpful he= re)=0A- Multiple P2P messages per UDP packet permitted=0A- Max UDP packet s= ize 100*1024 bytes=0A- Advertises NODE_UDP in nServices=0A- New "getudpcook= " TCP P2P command returns a "udpcook" message,=0Acontaining a yummy cookie= =0A- UDP P2P commands "inv", "tx" and "addr" are handled as if received via= TCP=0A- UDP P2P command "udpsub" sets a mask, that subscribes to one or mo= re=0Adata broadcasts.=0A- When USM_INV_BCAST mask bit is set, receive "inv"= messages via UDP=0Arather than TCP.=0A=0AProject and design goals (or, why= do this?):=0A=0A- It is theorized that UDP may be useful for some messages= we=0Abroadcast throughout the network=0A- A productive discussion STARTS w= ith code, otherwise discussion=0Acontinues forever.=0A- Investigate improvi= ng "inv" relay speed=0A- Investigate unconditional "tx" broadcasting via UD= P, as "inv"=0Aalternative, for small tx's.=0A- Investigate improving block = relay speed (or perhaps block header relay speed)=0A- Open up new design av= enues, for P2P patterns more suited to UDP than=0ATCP in general.=0A=0A-- = =0AJeff Garzik=0AexMULTI, Inc.=0Ajgarzik@exmulti.com=0A=0A-----------------= -------------------------------------------------------------=0AEveryone ha= tes slow websites. So do we.=0AMake your web apps faster with AppDynamics= =0ADownload AppDynamics Lite for free today:=0Ahttp://p.sf.net/sfu/appdyn_d= 2d_mar=0A_______________________________________________=0ABitcoin-developm= ent mailing list=0ABitcoin-development@lists.sourceforge.net=0Ahttps://list= s.sourceforge.net/lists/listinfo/bitcoin-development=0A