📚 Reti Peer To Peer - Università degli Studi di Ferrara 📚

A peer-to-peer server based on Gnutella's approach:

Query flooding

Fully distributed

• No central server
• Peers contact a few nodes to become neighbours
• Search: peers ask neighbors, who ask their neighbors
• Peers get files directly from other nodes

Advantages

• Fully decentralized
• Search cost distributed
• Processing per node permits powerful search semantics

Disadvantages

• Search scope may be quite large
• Search time may be quite long
• High overhead, and nodes come and go often

python3 R00tella.py

Files to be shared must be put in the 'shared' folder. Files must be present at app's startup, otherwise they won't be managed.

Note: Python 3.6 or above is required

[xxxB] = the parameter length in bytes

# Search a File
QUER[4B].Packet_Id[16B].IP_Peer[55B].Port_Peer[5B].TTL[2B].Research[20B]
# Server response will be
AQUE[4B].Packet_Id[16B].IP_Peer_j[55B].Port_Peer_j[5B].Filemd5[32B].Filename[100B]

# Search Neighbour
NEAR[4B].Packet_Id[16B].IP_Peer[55B].Port_Peer[5B].TTL[2B]
# Server response will be
ANEA[4B].Packet_Id[16B].IP_Peer_j[55B].Port_Peer_j[5B]

# Download a File
RETR[4B].Filemd5[32B]
# Server response will be
ARET[4B].\#chunk[3B].{Lenchunk_i[5B].data[LB]}(i=1..#chunk)

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

Enjoy 😎