Home¶

• Study of bittorent protocol
• Study of UPNP
• Study of UDP multicast
• Study of Thrift
• Study of Protocol Buffer
• Protocols

Brainstorming¶

• Core and GUI are independent. They communicate over TCP socket.
  • It is possible to launch the core without the GUI. The core does not depend of any kind of graphic library.
  • If the GUI crashes then the core remains.
• Designed for LAN usage (full trusted peers and very high speed transfers).
• Efficient (very low CPU usage).
• Distributed download (multi peer downloading and no central server).
  • Quicker peer first. The speed of a peer is an average over a period of time say 5 min. The speed of an unknown peer is maximum thus it will be take first. If a downloading is too slow (like three time slower than the best known peer) then it can switch to a quicker free peer.
  • Rarest parts first.
  • A part can be resumed from any peer which own a complete copy.
  • A file from a user is identified by its name and its folder.
  • Fixed part size (2^24 B = 16 MB) hashed with SHA-1. Used to control the integrity of parts and to identify each part. If the SHA-1 of a part does not match the given SHA-1 then it will be re-downloaded entirely.
  • The number of concurrent download is around 3 parts and the number of concurrent upload is unlimited.
  • Recursive folder downloading.
  • The paths of the files are recreated in the downloading peer.
• There is a general chat. There is no private chat. The chat uses UDP multicast (if possible).
• Multicast UDP for services discovering (maybe UPNP). Each peer announces periodically he is alive with a multicast message.
• MDI GUI with GTK2HS.
  • A panel to view the current peers and their amount of sharing.
  • A window to view the current downloads (leechage) and one for the current uploads (seedage). These windows are very similar.
  • A window for the chat.
  • Some windows for each file browsing. The files and folders are seen like a tree (like in the Finder of Mac OS X)
  • Some windows for each file searching. The displayed list is identical to the browsing list.
  • A modal window for the settings.
    • The shared folders.
    • The incoming folders (take the first if enough available space disk otherwise the second and so one..).
    • Bandwidth and CPU limitation with a single option (checkbox).
• Using of Thrift or Protocol Buffers for definition of the protocol between two peers and between the Core and the GUI.
• File list with name+size.
• Non blocking search, the list is dynamically filled for each peer answer.
• Using of systray (optional).

Secondary ideas¶

• Parse meta data like ID3tag when searching.
• Graphics of the transfer rate over time.
• Free space management.
• Private chat
• Automatically detect a running game and set the limitation flag.