+- Python Forum (https://python-forum.io)
+-- Forum: Python Coding (https://python-forum.io/forum-7.html)
+--- Forum: General Coding Help (https://python-forum.io/forum-8.html)
+--- Thread: How to extract MSS (maximum size segment) from a pcap file ? (/thread-27958.html)
How to extract MSS (maximum size segment) from a pcap file ? - salwa17 - Jun-29-2020
I want to extract the MSS (Maximum Size Segment)from a pcap file but I got only 0 while I have Not NULL values in this field:
def is_tcp_options(packet):
if packet.haslayer(TCP):
if packet[TCP].options:
return True
return False
def get_tcp_options(packet, option=None):
if is_tcp_options(packet):
for opt in packet[TCP].options:
if opt[0] == option:
return opt
return None
def get_tcp_options_s(s, s_ip, c_ip, opt):
sOptions = []
cOptions = []
for p in s:
if p.haslayer(TCP) and p.haslayer(IP):
if (p[IP].src == s_ip):
o = get_tcp_options(p, opt)
if o:
sOptions.append(o[1])
if (p[IP].src == c_ip):
o = get_tcp_options(p, opt)
if o:
cOptions.append(o[1])
return sOptions, cOptionsThen I call the last function in my main.py file.Any Idea about why I got only 0 as value ?