我试图在Scapy中编写一个简单的嗅探器,它只使用GET方法打印HTTP数据包.这是代码:
#!/usr/bin/python
from scapy.all import *
def http_header(packet):
http_packet=str(packet)
if http_packet.find('GET'):
print GET_print(packet)
print packet
def GET_print(packet1):
print "***************************************GET PACKET****************************************************"
print packet1
print "*****************************************************************************************************"
sniff(iface='eth0',prn=http_header)
这是输出:
*****************************************************************************************************
None
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XuW�F=���-�k=X:�
***************************************GET PACKET****************************************************
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$��J�k-�9����}�Ϡf�27��QKԛ�`�GY�8��Sh���Y@8�E9�Rϔ�&a�/vkф��6�DF`�/9�I�d( ��-��[A
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*****************************************************************************************************
我期待的是:
GET / HTTP/1.1
Host: google.com
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20140722 Firefox/24.0 Iceweasel/24.7.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip,deflate
Cookie: PREF=ID=758a20b5fbd4eac9:U=2b2dedf6c84b001f:FF=0:TM=1412150291:LM=1415430021:S=Q-QemmrLqsSsEA9i; NID=67=mRdkPVhtImrOTLi5I1e5JM22J7g26jAcdiDEjj9C5q0H5jj0DWRX27hCM7gLJBeiowW-8omSv-1ycH595SW2InWX2n1JMMNh6b6ZrRsZ9zOCC2a-vstOQnBDSJu6K9LO
Connection: keep-alive
我该怎么做才能获得预期的产量?
最佳答案
您需要使用数据包的
sprintf
function而不是打印数据包本身.您还需要拆分从它返回的字符串并将其与换行符一起连接在一起,否则它会在一行中将其全部吐出:
#!/usr/bin/python
from scapy.all import *
def http_header(packet):
http_packet=str(packet)
if http_packet.find('GET'):
return GET_print(packet)
def GET_print(packet1):
ret = "***************************************GET PACKET****************************************************\n"
ret += "\n".join(packet1.sprintf("{Raw:%Raw.load%}\n").split(r"\r\n"))
ret += "*****************************************************************************************************\n"
return ret
sniff(iface='eth0',prn=http_header,filter="tcp port 80")
我还为TCP端口80添加了一个过滤器,但如果需要,可以将其删除.
示例输出:
***************************************GET PACKET****************************************************
'GET /projects/scapy/doc/usage.html HTTP/1.1
Host: www.secdev.org
Connection: keep-alive
Cache-Control: max-age=0
Accept: text/html,image/webp,*/*;q=0.8
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML,like Gecko) Chrome/39.0.2171.65 Safari/537.36
Referer: https://www.google.co.uk/
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-GB,en;q=0.8,en-US;q=0.6
If-None-Match: "28c84-48498d5654df67640-gzip"
If-Modified-Since: Mon,19 Apr 2010 15:44:17 GMT
'
*****************************************************************************************************
Pierre指出你可以通过使用sniff()的lfilter参数完全取消http_header函数.我冒昧地在同一时间使代码更简洁:
#!/usr/bin/python
from scapy.all import *
stars = lambda n: "*" * n
def GET_print(packet):
return "\n".join((
stars(40) + "GET PACKET" + stars(40),"\n".join(packet.sprintf("{Raw:%Raw.load%}").split(r"\r\n")),stars(90)))
sniff(
iface='eth0',prn=GET_print,lfilter=lambda p: "GET" in str(p),filter="tcp port 80")