pyPLC/demo_socket.py

43 lines
1.3 KiB
Python
Raw Normal View History

2022-10-21 19:27:39 +00:00
# explanation of socket handling:
# https://realpython.com/python-sockets/
#
import socket
import select
print("Press Ctrl-Break for aborting")
TCP_IP = 'fe80::e0ad:99ac:52eb:85d3'
TCP_PORT = 15118 # The port for CCS
BUFFER_SIZE = 1024 # Normally 1024
ourSocket = socket.socket(socket.AF_INET6, socket.SOCK_STREAM, 0)
ourSocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
ourSocket.bind((TCP_IP, TCP_PORT))
ourSocket.listen(1)
print("listening on port " + str(TCP_PORT))
# example from https://stackoverflow.com/questions/5308080/python-socket-accept-nonblocking
read_list = [ourSocket]
while True:
# The select() function will block until one of the socket states has changed.
# We specify a timeout, to be able to run it in the main loop.
print("before select")
readable, writable, errored = select.select(read_list, [], [], 0.5)
for s in readable:
if s is ourSocket:
client_socket, address = ourSocket.accept()
read_list.append(client_socket)
print("Connection from", address)
else:
data = s.recv(1024)
if data:
print("received data:", data)
else:
print("connection closed")
s.close()
read_list.remove(s)