D-LAN

h1. Home

* [[Study of bittorent protocol]]

* [[Study of UPNP]]

* [[Protocol]]

h2. Description

A bit brainstormed for the moment ;)

* Designed for LAN usage (full trusted peers)

* Efficient (very low cpu usage)

* Distributed download (multi peer downloading and no central server)

** Quicker seed first. The speed of a peer is an average over a period of time say 5 min. A speed of a peer can be unknown. If a downloading is too slow (like three time slower than the best known peer) then it can switch from a quicker free seed.

** Rarest parts first.

** A part can be resumed from any peer.

** Fixed part size (2^24 B = 16 MB) hashed with SHA-1. Used to control the integrity of parts and to identify a file. A file is identified by the concatenation of all the SHA1 of all its parts. If the SHA-1 of a part does not match with the given SHA-1 then it will be re-downloaded entirely.

** Recursive folder downloading

* There is a general chat

* Multicast UDP for services discovering (maybe UPNP)

* MDI GUI with GTK2HS

** A panel to view the current peers

** A window to view the current downloads (leechage) and one for the current uploads (seedage)

** A window for the chat

** A window for searching

** Some windows for each file browsing

** A modal window for the settings

*** The shared folders

*** The incoming folder

*** Bandwidth limitation

* File list with name+size

* Non blocking search

* Using of systray (optional)

* Free space management

* Graphic of the transfert rate over time