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()