python多线程扫描端口(线程池)

扫描服务器ip开放端口，用线程池ThreadPoolExecutor，i7的cpu可以开到600个左右现成,大概20s左右

扫描服务器ip开放端口，用线程池ThreadPoolExecutor，i7的cpu可以开到600个左右现成,大概20s左右扫描完65535个端口，根据电脑配置适当降低线程数

#!/usr/local/python3.6.3/bin/python3.6
# coding = utf-8

import socket
import datetime
import re
from concurrent.futures import ThreadPoolExecutor, wait

DEBUG = False

# 判断ip地址输入是否符合规范
def check_ip(ipAddr):
 compile_ip = re.compile('^(1\d{2}|2[0-4]\d|25[0-5]|[1-9]\d|[1-9])\.(1\d{2}|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.(1\d{2}|2[0-4]\d|25[0-5]|[1-9]\d|\d)\.(1\d{2}|2[0-4]\d|25[0-5]|[1-9]\d|\d)$')
 if compile_ip.match(ipAddr):
 return True
 else:
 return False

# 扫描端口程序
def portscan(ip, port):
 try:
 s = socket.socket()
 s.settimeout(0.2)
 s.connect((ip, port))
 openstr = f'[+] {ip} port:{port} open'
 print(openstr)
 except Exception as e:
 if DEBUG is True:
 print(ip + str(port) + str(e))
 else:
 return f'[+] {ip} port:{port} error'
 finally:
 s.close

#主程序,利用ThreadPoolExecutor创建600个线程同时扫描端口
def main():
 while True:
 ip = input("请输入ip地址:")
 if check_ip(ip):
 start_time = datetime.datetime.now()
 executor = ThreadPoolExecutor(max_workers=600)
 t = [executor.submit(portscan, ip, n) for n in range(1, 65536)]
 if wait(t, return_when='ALL_COMPLETED'):
 end_time = datetime.datetime.now()
 print("扫描完成,用时:", (end_time - start_time).seconds)
 break


if __name__ == '__main__':
 main()

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