diff options
| author | Jeff Garzik <jgarzik@exmulti.com> | 2013-03-23 03:17:06 -0400 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2013-03-23 07:17:15 +0000 |
| commit | 81b36a0bfc4005d17a9fe1132c81593f35d62d16 (patch) | |
| tree | 895aa1ca6893bbde5b1dfcf8235a73ed8eb7df4f /8d/4aa992e8760775373b86c1b240fed95c04d06f | |
| parent | c3d58341cec64cf9d7efa0738ebc2398401c10a9 (diff) | |
| download | pi-bitcoindev-81b36a0bfc4005d17a9fe1132c81593f35d62d16.tar.gz pi-bitcoindev-81b36a0bfc4005d17a9fe1132c81593f35d62d16.zip | |
[Bitcoin-development] A bitcoin UDP P2P protocol extension
Diffstat (limited to '8d/4aa992e8760775373b86c1b240fed95c04d06f')
| -rw-r--r-- | 8d/4aa992e8760775373b86c1b240fed95c04d06f | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/8d/4aa992e8760775373b86c1b240fed95c04d06f b/8d/4aa992e8760775373b86c1b240fed95c04d06f new file mode 100644 index 000000000..380ba4e66 --- /dev/null +++ b/8d/4aa992e8760775373b86c1b240fed95c04d06f @@ -0,0 +1,98 @@ +Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] + helo=mx.sourceforge.net) + by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) + (envelope-from <jgarzik@exmulti.com>) id 1UJIhX-0003ep-K3 + for bitcoin-development@lists.sourceforge.net; + Sat, 23 Mar 2013 07:17:15 +0000 +X-ACL-Warn: +Received: from mail-pb0-f45.google.com ([209.85.160.45]) + by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) + (Exim 4.76) id 1UJIhU-0001O0-HX + for bitcoin-development@lists.sourceforge.net; + Sat, 23 Mar 2013 07:17:15 +0000 +Received: by mail-pb0-f45.google.com with SMTP id ro8so3401010pbb.32 + for <bitcoin-development@lists.sourceforge.net>; + Sat, 23 Mar 2013 00:17:06 -0700 (PDT) +X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; + d=google.com; s=20120113; + h=mime-version:x-received:x-originating-ip:date:message-id:subject + :from:to:content-type:x-gm-message-state; + bh=ho48kf0302A2NXFQJyfNXs9cML008JwuWcn6DFxXQwY=; + b=fkwo7nBHI6j3Jk+AG2mjWRyagCq3b/bfraleF/oy9RvBA1KtzDTIebCHdjrNSOhyVh + 3D1BiGkKjNXMAZWMJ317R58PFza4qcdBIWhM/aHrwcVMDr/0V/1mL3dmA9aX11XMA+6V + MHK9UVnik0EY+Xfj8DRdBJChlNURcRNsHSFmULU94gUSqdxzz0KQkVnFhDVuOkqBgANl + 49kOKxLXNJe0JIsG6vhWQu1Qr0d8Lual8EWyZ0sUNuwxYXEHZbRCfYxSrHBW6VwLcAnh + vktjXBBNa1433ZiIGVoSm9B4IRm+0Q0a9YL2PySGjZjAv44/n7f3d55olW25Q/HmJZLT + 9c7Q== +MIME-Version: 1.0 +X-Received: by 10.68.143.197 with SMTP id sg5mr6760418pbb.101.1364023026593; + Sat, 23 Mar 2013 00:17:06 -0700 (PDT) +Received: by 10.68.146.133 with HTTP; Sat, 23 Mar 2013 00:17:06 -0700 (PDT) +X-Originating-IP: [99.43.178.25] +Date: Sat, 23 Mar 2013 03:17:06 -0400 +Message-ID: <CA+8xBpe9D=poPyJ=soGdN3sovqdmvyGGij6FM8PHYGUB5aUkzQ@mail.gmail.com> +From: Jeff Garzik <jgarzik@exmulti.com> +To: Bitcoin Development <bitcoin-development@lists.sourceforge.net> +Content-Type: text/plain; charset=ISO-8859-1 +X-Gm-Message-State: ALoCoQn6ckseAtQcvf13oZiw0GtMIz+3RnRhCYQwM/JCkFGU1MQ7U5lFnqcOmJ1R2Zdqfm7lvSCH +X-Spam-Score: 0.0 (/) +X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. + See http://spamassassin.org/tag/ for more details. +X-Headers-End: 1UJIhU-0001O0-HX +Subject: [Bitcoin-development] A bitcoin UDP P2P protocol extension +X-BeenThere: bitcoin-development@lists.sourceforge.net +X-Mailman-Version: 2.1.9 +Precedence: list +List-Id: <bitcoin-development.lists.sourceforge.net> +List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>, + <mailto:bitcoin-development-request@lists.sourceforge.net?subject=unsubscribe> +List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=bitcoin-development> +List-Post: <mailto:bitcoin-development@lists.sourceforge.net> +List-Help: <mailto:bitcoin-development-request@lists.sourceforge.net?subject=help> +List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>, + <mailto:bitcoin-development-request@lists.sourceforge.net?subject=subscribe> +X-List-Received-Date: Sat, 23 Mar 2013 07:17:15 -0000 + +Here is a rough draft implementation of a UDP P2P protocol extension +for bitcoin: + + https://github.com/jgarzik/bitcoin/tree/udp + http://yyz.us/bitcoin/udp-v0.patch + +Protocol specification (such that it is): + +- UDP, bound to same port as TCP P2P (normally 8333) +- Active, simultaneous TCP P2P connection required (useful against DoS +and other attacks) +- Same message format as TCP P2P, same pchMessageStart conventions, +etc. (my CNetMessage pull req would be helpful here) +- Multiple P2P messages per UDP packet permitted +- Max UDP packet size 100*1024 bytes +- Advertises NODE_UDP in nServices +- New "getudpcook" TCP P2P command returns a "udpcook" message, +containing a yummy cookie +- UDP P2P commands "inv", "tx" and "addr" are handled as if received via TCP +- UDP P2P command "udpsub" sets a mask, that subscribes to one or more +data broadcasts. +- When USM_INV_BCAST mask bit is set, receive "inv" messages via UDP +rather than TCP. + +Project and design goals (or, why do this?): + +- It is theorized that UDP may be useful for some messages we +broadcast throughout the network +- A productive discussion STARTS with code, otherwise discussion +continues forever. +- Investigate improving "inv" relay speed +- Investigate unconditional "tx" broadcasting via UDP, as "inv" +alternative, for small tx's. +- Investigate improving block relay speed (or perhaps block header relay speed) +- Open up new design avenues, for P2P patterns more suited to UDP than +TCP in general. + +-- +Jeff Garzik +exMULTI, Inc. +jgarzik@exmulti.com + + |