add nc

添加了nc工具包，现在对nc脚本题可以在python里直接批处理啦

Author: Thaumaturge2020

test_netcat.py

@@ -0,0 +1,54 @@
+import argparse
+import socket
+import sys
+import threading
+
+def handle_input(client_socket):
+    while True:
+        data = sys.stdin.readline()
+        client_socket.sendall(data.encode())
+
+def handle_output(client_socket):
+    while True:
+        data = client_socket.recv(1024)
+        if not data:
+            break
+        sys.stdout.write(data.decode())
+
+def netcat(host, port):
+    client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    client_socket.connect((host, port))
+
+    input_thread = threading.Thread(target=handle_input, args=(client_socket,))
+    output_thread = threading.Thread(target=handle_output, args=(client_socket,))
+
+    input_thread.start()
+    output_thread.start()
+
+    input_thread.join()
+    output_thread.join()
+
+    client_socket.close()
+
+def main():
+    parser = argparse.ArgumentParser(description='Python Netcat Tool')
+    parser.add_argument('-l', '--listen', action='store_true', help='Listen mode')
+    parser.add_argument('-p', '--port', type=int, default=8080, help='Port to connect or listen')
+    parser.add_argument('host', type=str, help='Host to connect')
+
+    args = parser.parse_args()
+
+    if args.listen:
+        server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        server_socket.bind(('0.0.0.0', args.port))
+        server_socket.listen(1)
+        client_socket, _ = server_socket.accept()
+        handle_input(client_socket)
+        handle_output(client_socket)
+        server_socket.close()
+    else:
+        netcat(args.host, args.port)
+
+if __name__ == '__main__':
+    main()
+