python 多线程 实现端口扫描

# -*- coding: utf-8 -*- #!/usr/bin/python2 from socket import * import threading lock = threading.Lock() openNum = 0 def portScanner(host,port): global openNum try: s = socket(AF_INET,SOCK_STREAM) s.connect((host,port)) lock.acquire() openNum+=1 print('[+] %d open' % port) lock.release() s.close() except: pass def main(): setdefaulttimeout(1) for n in range(1,76): threads = [] #print (n-1)*880,n*880 for p in range((n-1)*880,n*880): t = threading.Thread(target=portScanner,args=('127.0.0.1',p)) threads.append(t) t.start() for t in threads: pass t.join()#在子线程完成运行之前，这个子线程的父线程将一直被阻塞。 print('[*] The scan is complete!') print('[*] A total of %d open port ' % (openNum)) if __name__ == '__main__': main()

执行结果：

[+] 135 open [+] 443 open [+] 903 open [+] 913 open [+] 1536 open [+] 1537 open [+] 1538 open [+] 1542 open [+] 1548 open [+] 1556 open [+] 2869 open [+] 4000 open [+] 4300 open [+] 4301 open [+] 5939 open [+] 7680 open [+] 8307 open [+] 8363 open [+] 8382 open [+] 8911 open [+] 8912 open [+] 12037 open [+] 12056 open [+] 13790 open [+] 14979 open [+] 23405 open [+] 28317 open [+] 29917 open [+] 49152 open [+] 61078 open [*] The scan is complete! [*] A total of 30 open port 

for p in range(1,1024):       t = threading.Thread(target=portScanner,args=('127.0.0.1',p))       threads.append(t)       t.start()

出错：thread.error: can't start new thread

本人计算机的最大并发线程是866，这里有1024，超过最大线程数导致出错

TCP/IP协议中的端口，端口号的范围从0到65535，扫描65535个端口的状况.

for n in range(1,76):     threads = []     #print (n-1)*880,n*880     for p in range((n-1)*880,n*880):       t = threading.Thread(target=portScanner,args=('127.0.0.1',p))       threads.append(t)       t.start()       for t in threads:       pass     t.join()#在子线程完成运行之前，这个子线程的父线程将一直被阻塞。