1
我编写了这个程序来嗅探网络中的icmp数据包并打印出那里的源地址。代码如下:运行Scapy嗅探函数时出错
from scapy.all import *
def fun_callback(pkt):
print str(pkt.payload.src)
sniff(prn = fun_callback, filter = 'icmp', timeout =5)
运行此程序后,我收到此错误。
[[email protected] icmp]# python test.py
WARNING: Failed to execute tcpdump. Check it is installed and in the PATH
WARNING: No route found for IPv6 destination :: (no default route?)
192.168.134.131
192.168.134.131
192.168.134.2
192.168.134.2
fe80::20c:29ff:fee4:a130
134.160.38.1
192.168.134.131
Traceback (most recent call last):
File "test.py", line 5, in <module>
sniff(prn = fun_callback, filter = 'icmp', timeout =5)
File "/usr/lib/python2.7/site-packages/scapy/sendrecv.py", line 586, in sniff
r = prn(p)
File "test.py", line 4, in fun_callback
print str(pkt.payload.src)
File "/usr/lib/python2.7/site-packages/scapy/packet.py", line 176, in __getattr__
fld,v = self.getfield_and_val(attr)
File "/usr/lib/python2.7/site-packages/scapy/packet.py", line 172, in getfield_and_val
return self.payload.getfield_and_val(attr)
File "/usr/lib/python2.7/site-packages/scapy/packet.py", line 172, in getfield_and_val
return self.payload.getfield_and_val(attr)
File "/usr/lib/python2.7/site-packages/scapy/packet.py", line 1057, in getfield_and_val
raise AttributeError(attr)
AttributeError: src
[[email protected] icmp]#
为什么会发生这种例外情况?
似乎没有src属性。再次检查文档 – Moj
当数据包中的特定字段为空或不存在时,通常会发生这种情况。在这种情况下,你的数据包似乎没有源字段。 – TheCreator232