UDP broadcast quick playground

Dockerfile

FROM alpine:3.6
RUN apk --update add python3
CMD ["python3"]

recv

#!/usr/bin/env python3

import socket

PORT = 8888

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind(('', PORT))
print('Bound to {}'.format(PORT))
while True:
    data, addr = s.recvfrom(1024)
    int_val = int.from_bytes(data, byteorder='big')
    print('Recv {} from {}'.format(int_val, addr))

send

#!/usr/bin/env python3

import socket
import time

PORT = 8888

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.bind(('', PORT))
s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
print('Bound to {}'.format(PORT))
for i in range(256):
    data = bytes([i])
    s.sendto(data, ('<broadcast>', PORT))
    print('Sent value: {}'.format(i))
    time.sleep(2)

Build & run:

docker build -t test .
docker run -it -v $PWD:/opt -w /opt test ./recv