python编写简单端口扫描器

from socket import *
from threading import Thread
import optparse
Port = [80,21,23,22,25,110,443,1080,3306,3389,1521,1433]
Server = ['HTTP','FTP','TELNET','SSH','SMTP','POP3','HTTPS','SOCKS','MYSQL','Misrosoft RDP','Oracle','Sql Server']
def Scan(tghost,tgport,Server):
  try:
    s=socket()
    s.connect((tghost,tgport))
    print(tghost+'____>'+str(tgport)+' open',end='||||| ')
    print(str(tgport)+'---->'+Server)
    s.close()
  except:
    print(str(tgport)+'----> '+'not open')

def hostToaddr(host):#将域名转成ip
  try:
    return gethostbyname(host)
  except:
    return 
def main():
  parser=optparse.OptionParser()
  parser.add_option('-t', dest='dname')
  #parser.add_option('-p',dest='pname')
  (options,args)=parser.parse_args()


  if(options.dname==None):
    print('[-] You must specify a target host and port')
    exit(0)
  else:
    tgname=options.dname
  ip=hostToaddr(tgname)
  #Scan(ip)
  for i,j in zip(Port,Server):#用线程提高速度
    t=Thread(target=Scan,args=(ip,i,j))
    t.start()
  input()#cmd界面如果快速闪退，请加入这条代码
if __name__=='__main__':
  main()