如何在 scapy 中创建自定义 top-level 层 2 header？

Question

假设我有以下内容：

class Delimiter(Packet):
    name = "Delimiter"
    fields_desc = [
        ByteField("val", 0)
    ]

class OutHeader(Packet):
    name = "Out Header"
    fields_desc = [
        ShortField("index", 0)
    ]

bind_layers(Delimiter, OutHeader, val=0)
bind_layers(OutHeader, Ether)

我想将 Delimeter 设为第 2 层 header，这样数据包顶部就没有以太币 header。我怎样才能做到这一点？仅使用这段代码，Scapy 就会改为读取：

###[ 802.3 ]###
  dst       = 00:51:99:ff:ff:ff
  src       = ff:ff:ff:00:00:00
  len       = 0
###[ Padding ]###

Answer 1

我最终通过手动切掉 headers 解决了这个问题，没有自定义数据包 objects:

s = str(pkt).encode("hex")
delim = int(s[:2])
index = int(s[2:6], 16)
rest = Ether(s[6:].decode("hex"))

如何在 scapy 中创建自定义 top-level 层 2 header？

How to create a custom top-level layer 2 header in scapy?

networking

scapy

packet

packet-sniffers