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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