104 lines
3.1 KiB
Python
104 lines
3.1 KiB
Python
import queue
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from multiprocessing import Process, Queue
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import socket
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import traceback
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def _start_tcp_server(port, server_queue: Queue, ipv6, verbose):
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sock = socket.socket(
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socket.AF_INET6 if ipv6 else socket.AF_INET, socket.SOCK_STREAM
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)
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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sock.bind(("::1" if ipv6 else "127.0.0.1", port))
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sock.listen(8)
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while True:
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connection, address = sock.accept()
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while True:
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try:
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buf = connection.recv(4096)
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if buf == b"":
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break
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reply = buf # Default to echo
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try:
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# See if there is a custom reply, but don't block
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custom_reply = server_queue.get(block=False)
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reply = custom_reply
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except queue.Empty:
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pass # No custom reply, just echo
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if verbose:
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print("SERVER: ", reply)
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connection.sendall(reply)
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except (ConnectionResetError, BrokenPipeError):
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break # Client closed connection
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except Exception:
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if verbose:
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traceback.print_exc()
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break # Exit on other errors
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connection.close()
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class TcpServer:
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def __init__(self, port, ipv6, proxy_port=None, verbose=False):
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self.proxy_port = proxy_port
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self.ipv6 = ipv6
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self.port = port
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self.verbose = verbose
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self._server_data_queue = Queue()
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self._regen_process()
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def _regen_process(self):
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self.server = Process(
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target=_start_tcp_server,
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args=[self.port, self._server_data_queue, self.ipv6, self.verbose],
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)
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def start(self):
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self.server.start()
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def stop(self):
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self.server.terminate()
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self.server.join()
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self._regen_process()
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def connect_client(self):
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self.client_sock = socket.socket(
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socket.AF_INET6 if self.ipv6 else socket.AF_INET, socket.SOCK_STREAM
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)
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self.client_sock.settimeout(1)
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self.client_sock.connect(
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(
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"::1" if self.ipv6 else "127.0.0.1",
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self.proxy_port if self.proxy_port else self.port,
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)
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)
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def close_client(self):
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if self.client_sock:
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self.client_sock.close()
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def send_packet(self, packet, server_reply=None):
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if self.verbose:
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print("CLIENT: ", packet)
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if server_reply:
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self._server_data_queue.put(server_reply)
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self.client_sock.sendall(packet)
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def recv_packet(self):
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try:
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return self.client_sock.recv(4096)
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except (TimeoutError, ConnectionResetError):
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if self.verbose:
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traceback.print_exc()
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return False
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def sendCheckData(self, data, get_data=False):
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self.connect_client()
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self.send_packet(data)
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received_data = self.recv_packet()
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self.close_client()
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if get_data:
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return received_data
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return received_data == data
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