From fe4050e26c15592ae8112bedbb3822028b67b87c Mon Sep 17 00:00:00 2001 From: dnomd343 Date: Wed, 6 Jul 2022 11:21:44 +0800 Subject: [PATCH] feat: basic function module --- Basis/Functions.py | 68 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 Basis/Functions.py diff --git a/Basis/Functions.py b/Basis/Functions.py new file mode 100644 index 0000000..31bb79e --- /dev/null +++ b/Basis/Functions.py @@ -0,0 +1,68 @@ +#!/usr/bin/env python3 +# -*- coding: utf-8 -*- + +import time +import random +import socket +from Basis.Logger import logging + + +def genFlag(length: int = 12) -> str: # generate random task flag + flag = '' + for i in range(0, length): + tmp = random.randint(0, 15) + if tmp >= 10: + flag += chr(tmp + 87) # a ~ f + else: + flag += str(tmp) # 0 ~ 9 + logging.debug('generate new flag -> ' + flag) + return flag + + +def getAvailablePort(rangeStart: int = 41952, rangeEnd: int = 65535) -> int: # get a available port + if rangeStart > rangeEnd or rangeStart < 1 or rangeEnd > 65535: + raise RuntimeError('invalid port range') + while True: + port = random.randint(rangeStart, rangeEnd) # choose randomly + if checkPortStatus(port): + logging.debug('get new port -> %i' % port) + return port + time.sleep(0.1) # wait for 100ms + + +def checkPortStatus(port: int) -> bool: # check if the port is occupied + ipv4Tcp = None + ipv4Udp = None + ipv6Tcp = None + ipv6Udp = None + try: + ipv4Tcp = socket.socket(socket.AF_INET, socket.SOCK_STREAM) + ipv4Udp = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) + ipv4Tcp.bind(('0.0.0.0', port)) + ipv4Udp.bind(('0.0.0.0', port)) + ipv4Tcp.close() + ipv4Udp.close() + ipv6Tcp = socket.socket(socket.AF_INET6, socket.SOCK_STREAM) + ipv6Udp = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM) + ipv6Tcp.bind(('::', port)) + ipv6Udp.bind(('::', port)) + ipv6Tcp.close() + ipv6Udp.close() + logging.debug('check status of port %i -> available' % port) + return True # IPv4 TCP / IPv4 UDP / IPv6 TCP / IPv6 UDP are normal + except: + logging.debug('check status of port %i -> occupied' % port) + return False + finally: # close socket + try: + ipv4Tcp.close() + except: pass + try: + ipv4Udp.close() + except: pass + try: + ipv6Tcp.close() + except: pass + try: + ipv6Udp.close() + except: pass