实现高效端口扫描

#!/usr/bin/env python
#coding=utf-8

'''
探测端口连通性, 需要安装nmap命令
'''
import sys
import nmap

data = raw_input('Please input hosts and port: ')
scan_row = data.split(" ")
if len(scan_row) != 2:
  print("Input error, example: 192.168.1.0/24 80,443,22")
  sys.exit()

hosts = scan_row[0]
port = scan_row[1]

try:
  nm = nmap.PortScanner()
except nmap.PortScannerError:
  print('Nmap not found', sys.exc_info()[0])
  sys.exit()
except:
  print("Unexpected error：", sys.exc_info()[0])
  sys.exit()

try:
  # 调用扫描方法, 参数指定扫描主机hosts, nmap扫描命令行参数arguments
  nm.scan(hosts=hosts, arguments=' -v -sS -p ' + port)
except Exception, e:
  print("Scan error: " + str(e))

for host in nm.all_hosts():
  print('----------------------------------------------------')
  print('Host: %s (%s)' % (host, nm[host].hostname()))
  print('State: %s' % nm[host].state())  # 输出主机状态, 如up、down
  for proto in nm[host].all_protocols(): # 遍历扫描协议, 如tcp、udp
    print('----------')
    print('Protocol: %s' % proto)  # 输入协议名
    lport = nm[host][proto].keys()  # 获取协议的所有扫描端口
    lport.sort()  # 端口列表排序
    for port in lport:  # 遍历端口及输出端口与状态
      print('port: %s\tstate: %s' % (port, nm[host][proto][port]['state']))