zorrent

Experimental Zig torrent library and client example program.

Requires the lastest (HEAD) zig version.

$ git pull --recurse-submodules https://github.com/gaultier/zorrent.git
# Requires libcurl
$ zig build
$ ./zig-cache/bin/zorrent zig-bencode/input/OpenBSD_6.6_alpha_install66.iso-2019-10-16-1254.torrent
OpenBSD_6.6_alpha_install66.iso [1043/1043 260.70MiB/260.70MiB] 100.00%

# Run all tests
$ zig build test

ROADMAP

• BEP-0003:
  • Download one file
  • Smart piece request based on the bitfield/have peer messages
  • Check pieces SHA1 hashes
  • Re-fetch piece if hash fails
  • Request pipelining
  • Support torrent with multiple files
  • Upload files (serve)
  • Save want state to continue downloading a file after a restart
  • Check hashes in parallel
  • Get peers from trackers in parallel
  • Pick up new peers while downloading from other peers
  • Notify tracker of events
  • Retry connecting to peers when disconnected
• Multi-tracker (BEP-0012)
• Compact peer list from tracker (BEP-0023)
• Better download algorithm: get rarest pieces first
• Fast extension (BEP-0006)
• UDP
• Extension messages
• Local Service Discovery (BEP-0014)