Fapster

:books: Reti Peer To Peer - Università degli Studi di Ferrara :books:

A peer-to-peer server based on the Napster's approach:

Centralized Directory Service

1. Client contacts Napster (via TCP)

• Provides a list of files it will share
• ...and Napster’s central server updates the directory

2. Client searches on a title

• Napster identifies online clients with the file
• ...and provides IP addresses

3. Client requests the file from the chosen supplier

• Supplier transmits the file to the client
• Both client and supplier report status to Napster

Properties

1. Server’s directory continually updated

• Always know what files are currently available
• Point of vulnerability for legal action

2. Peer-to-peer file transfer

• No load on the server
• Plausible deniability for legal action (but not enough)

Usage

python3 fapster_server.py

Note: Python 3.6.x or above is required

The server is now listening on port 3000.

Once a peer begins the communication, the directory server won't keep the connection open for further requests, so keep in mind:

• 1 request = 1 connection

Client's supported commands:

[xxxB] = the parameter length in bytes

# Login the peer into the directory
LOGI[4B].IP_Peer[55B].Port_Peer[5B]
# Server response will be
ALGI[4B].SessionID[16B]

# Logout the peer from the directory
LOGO[4B].SessionID[16B]
# Server response will be
ALGO[4B].\#delete[3B]

# Add a file to the directory
ADDF[4B].SessionID[16B].Filemd5[32B].Filename[100B]
# Server response will be
AADD[4B].\#copy[3B]

# Delete a file from the directory
DELF[4B].SessionID[16B].Filemd5[32B]
# Server response will be
ADEL[4B].\#copy[3B]

# Find a file in the directory
FIND[4B].SessionID[16B].Ricerca[20B]
# Server response will be
AFIN[4B].\#idmd5[3B].{Filemd5_i[32B].Filename_i[100B].\#copy_i[3B].{IPP2P_i_j[55B].PP2P_i_j[5B]}}(j=1..\#copy_i)}(i=1..\#idmd5)

# Register a file download
DREG[4B].SessionID[16B].Filemd5[32B]
# Server response will be
ADRE[4B].\#download[5B]

To-Do

• [x] Directory Server implementation
• [ ] Peer implementation

Authors :rocket:

• Federico Frigo
• Niccolò Fontana
• Giovanni Fiorini
• Marco Rambaldi

Enjoy :sunglasses: