The IETF PPSP peer protocol reference implementation
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README.md

libswift

The multiparty transport protocol.

Description

This is Libswift (aka BitTorrent at the transport layer). Differently from TCP, the protocol does not use the ordered data stream abstraction. Effectively, it splits a file into 1KB packets and sends them around. The secret sauce is Merkle hash trees and binmaps.

Requires libevent-2.0.17 or higher.

See doc/index.html for marketing stuff, ideas and rants, doc/draft-ietf-ppsp-peer-protocol-00.txt for the drafr protocol specification, and *.cpp files for the actual code.

Usage

swift.cpp is the main exec file; it may be run as e.g.

$ ./swift -t node300.das2.ewi.tudelft.nl:20000 -h \
d1502706c46779d361a1d562a10da0a45c4c40e5 -f \
trailer.ogg

...to retrieve video and save it to a file.

Alternatively, you might play with the HTTP gateway, the preliminary version. First, run the seeder-tracker:

$ ./swift -f ~/Downloads/big_buck_bunny_480p_stereo.ogg -l 0.0.0.0:20000
Root hash: 7c462ad1d980ba44ab4b819e29004eb0bf6e6d5f

...then you may try running the swift-HTTP gateway...

$ ./swift -t 127.0.0.1:20000 -g 0.0.0.0:8080 -w

...and finally you may point your browser at the gateway...

http://127.0.0.1:8080/7c462ad1d980ba44ab4b819e29004eb0bf6e6d5f

If you use an HTML5 browser (Chrome preferred), you are likely to see the bunny trailer at this point...