├── .gitignore
├── requirements.txt
└── main.py


/.gitignore:
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1 | .idea


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/requirements.txt:
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1 | kademlia==2.2.2
2 | netifaces==0.11.0
3 | PyQt6==6.4.0
4 | PyQt6-Qt6==6.4.1
5 | PyQt6-sip==13.4.0
6 | pyzmq==24.0.1
7 | rpcudp==4.0.2
8 | u-msgpack-python==2.7.2
9 | 


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/main.py:
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 1 | """Decentralized chat example"""
 2 | try:
 3 |     raw_input
 4 | except NameError:
 5 |     raw_input = input
 6 | 
 7 | import argparse
 8 | import os
 9 | from threading import Thread
10 | 
11 | # dependency, not in stdlib
12 | from netifaces import interfaces, ifaddresses, AF_INET
13 | 
14 | import zmq
15 | 
16 | 
17 | def listen(masked):
18 |     """listen for messages
19 | 
20 |     masked is the first three parts of an IP address:
21 | 
22 |         192.168.1
23 | 
24 |     The socket will connect to all of X.Y.Z.{1-254}.
25 |     """
26 |     ctx = zmq.Context.instance()
27 |     listener = ctx.socket(zmq.SUB)
28 |     for last in range(1, 255):
29 |         listener.connect("tcp://{0}.{1}:9000".format(masked, last))
30 | 
31 |     listener.setsockopt(zmq.SUBSCRIBE, b'')
32 |     while True:
33 |         try:
34 |             print(listener.recv_string())
35 |         except (KeyboardInterrupt, zmq.ContextTerminated):
36 |             break
37 | 
38 | 
39 | def main():
40 |     parser = argparse.ArgumentParser()
41 |     parser.add_argument("interface", type=str, help="the network interface",
42 |                         choices=interfaces(),
43 |                         )
44 |     parser.add_argument("user", type=str, default=os.environ['USER'],
45 |                         nargs='?',
46 |                         help="Your username",
47 |                         )
48 |     args = parser.parse_args()
49 |     inet = ifaddresses(args.interface)[AF_INET]
50 |     addr = inet[0]['addr']
51 |     masked = addr.rsplit('.', 1)[0]
52 | 
53 |     ctx = zmq.Context.instance()
54 | 
55 |     listen_thread = Thread(target=listen, args=(masked,))
56 |     listen_thread.start()
57 | 
58 |     bcast = ctx.socket(zmq.PUB)
59 |     bcast.bind("tcp://%s:9000" % args.interface)
60 |     print("starting chat on %s:9000 (%s.*)" % (args.interface, masked))
61 |     while True:
62 |         try:
63 |             msg = raw_input()
64 |             bcast.send_string("%s: %s" % (args.user, msg))
65 |         except KeyboardInterrupt:
66 |             break
67 |     bcast.close(linger=0)
68 |     ctx.term()
69 | 
70 | 
71 | if __name__ == '__main__':
72 |     main()
73 | 


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