1. Data

import pyshark

# 打开存储的捕获文件
caps = pyshark.FileCapture('icmp_data.pcap', display_filter="icmp")

result = ''

for cap in caps:
    if(cap.ip.addr == '30.0.250.11'):
        hex_string = str(cap.icmp.data)[16:18]
        bytes_object = bytes.fromhex(hex_string) 
        ascii_String = bytes_object.decode("ASCII") 
        result+=ascii_String

print(result)

2. Length

import pyshark

# 打开存储的捕获文件
caps = pyshark.FileCapture('icmp_len.pcap', display_filter="icmp")

result = ''

for cap in caps:
    if(cap.ip.addr == '30.0.250.11'):
        result+=chr(int(cap.icmp.data_len))

print(result)

3. LengthBinary

import pyshark
import binascii

# 打开存储的捕获文件
caps = pyshark.FileCapture('icmp_len_binary.pcap',
                           display_filter="icmp && icmp.type == 8")

result = ''

for cap in caps:
    if(cap.icmp.data_len == '32'):
        result += '0'
    else:
        result += '1'

binary_string = result
result = binascii.unhexlify('%x' % int(binary_string, 2))

print(result)