使用python套接字獲取udp數據包的流量類

Question

我想使用python套接字檢索udp數據包的流量類（TOS）。以下代碼在python中生成套接字，並且我想要檢索類似於（java套接字中的getTrafficClass方法）的流量類。

UDP_IP = '127.0.0.1' 
 
UDP_PORT = 8080 
 
BUFFER_SIZE = 20 
 

 
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) 
 

 
s.bind((UDP_IP, UDP_PORT)) 
 
data, address = s.recvfrom(BUFFER_SIZE) 
 
if data: 
 
    print "received data:", data 
 
    //I need to get the traffic class here.

Answer 1

我認爲象Java getTrafficClass()沒有現成的方法。可以讀取IP層報頭（一個UDP層標題下方），並分析它，例如代碼在Sniffy.pyhttps://github.com/OffensivePython/Sniffy/blob/master/Sniffy.py或https://codingsec.net/2016/05/decoding-ip-layer-python/

[...] 
def sniff(sock): 
""" sniff a packet, parse its header and dump the sniffed data """ 
packet, address = sock.recvfrom(65565) 
ipheader=ip(packet[:20]) 
ipheader.parse() 
[...]