小编use*_*124的帖子

我正在尝试编写一个Python脚本,该脚本使用Scapy模块ping内部IP范围以确定哪些IP在线.到目前为止我有这个:

#!/usr/bin/python
from scapy.all import *
conf.verb = 0
for ip in range(0, 256):
    packet = IP(dst="192.168.0." + str(ip), ttl=20)/ICMP()
    reply = sr1(packet)
    if "192.168." in reply.src:
         print reply.src, "is online"

该程序将暂时无所事事,然后如果我用CTRL + CI杀死它会得到一条错误消息:

Traceback (most recent call last):
File "sweep.py", line 7, in <module>
if "192.168." in reply.src:
AttributeError: 'NoneType' object has no attribute 'src'

但是,如果我尝试使用单个IP地址而不是范围,它可以工作.像这样:

#!/usr/bin/python
from scapy.all import *
conf.verb = 0
packet = IP(dst="192.168.0.195", ttl=20)/ICMP()
reply = sr1(packet)
if "192.168." in reply.src:
    print reply.src, "is online" …