Scapy BitField 和 type() 问题 [英] Scapy BitField and type() question

问题描述

我正在为 scapy 编写插件，但遇到了问题.我不得不稍微修改原始的 scapy 代码(每个类都继承自对象)修改后的代码可以在这里找到:http://pastebin.com/pjcL1KJv

I'm writing an addon for scapy, and encountered a problem. I had to slightly modify the original scapy code (every class is inheriting from object) The modified code can be found here: http://pastebin.com/pjcL1KJv

我写的代码如下:

class Foo():
   array=[ BitField("foo",0x0,2),
           BitField("foo1",0x0,2),
           BitField("bar",0x0,2),
           BitField("blub",None,2)
 ]
def returnArr(a):  
      for i in a.array:
           print type(i.default)


if __name__ == "__main__":
    a=Foo()
    a.blub=0x23
    returnArr(a)

输出:

<输入'int'>

<输入'int'>

<输入'int'>

<输入无类型">

我的问题:是否可以检测 BitField("foo",0x0,2) 的第二个参数是 0x0 还是其他什么?如果可能，我会怎么做?如果没有，为什么?

My question: Is it possible to detect if the second paremeter of BitField("foo",0x0,2) is 0x0 or something else? If it is possible, how would I do that? If not, why?

推荐答案

第二个参数称为 default，它作为属性存储，也称为 default.

The second parameter is called default, and it's stored as an attribute also called default.

b = BitField("foo",0x0,2)
b.default   # 0

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