68 lines
1.7 KiB
Python
68 lines
1.7 KiB
Python
import socket, os, sys, json
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from threading import Thread, Lock
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NETTRACE = str(os.environ.get("NETTRACE", "0")) == "1"
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class Sock:
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def __init__(self):
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
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self.queue = []
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self.queue_lock = Lock()
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self.sock_thread = None
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def send_raw(self, message, address):
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if type(message) == str:
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message = message.encode()
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if NETTRACE:
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print("Send to", tuple(address), ":", message, file=sys.stderr)
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self.sock.sendto(message, tuple(address))
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def send(self, message, address):
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message = json.dumps(message)
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if NETTRACE:
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print("Send to", tuple(address), ":", message, file=sys.stderr)
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self.sock.sendto(message.encode(), tuple(address))
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def listen(self, address, length=65535):
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self.sock_thread = SockThread(self, tuple(address), length)
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self.sock_thread.setDaemon(True)
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self.sock_thread.start()
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def get_raw(self):
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if len(self.queue) == 0:
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return []
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with self.queue_lock:
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queue = self.queue
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self.queue = []
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return queue
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def get(self):
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if len(self.queue) == 0:
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return []
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queue = []
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with self.queue_lock:
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for r in self.queue:
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try:
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queue.append([json.loads(r[0].decode()), r[1]])
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except:
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pass
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self.queue.clear()
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return queue
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class SockThread(Thread):
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def __init__(self, sock, address, length):
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Thread.__init__(self)
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self.sock = sock
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self.length = length
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self.sock.sock.bind(tuple(address))
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def run(self):
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while True:
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r = self.sock.sock.recvfrom(self.length)
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if NETTRACE:
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print("Rec from", r[1], ":", r[0], file=sys.stderr)
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with self.sock.queue_lock:
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self.sock.queue.append(r)
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