Pyshark Decode_as - Python

Pyshark is a Python wrapper for the popular packet parsing tool Wireshark. It allows easy access to captured network packet data and provides a simple interface for packet analysis.

One useful feature of Pyshark is the ability to decode packets using custom protocols. This is done using the decode_as() method, which allows you to specify the protocol and port to decode the packet as.

Example

Here is an example of using the decode_as() method to decode a packet as a custom protocol:

import pyshark

cap = pyshark.FileCapture('example.pcap')

# Decode all packets on port 1234 as MyCustomProtocol
cap.decode_as('udp.port==1234', 'MyCustomProtocol')

for packet in cap:
    # Access packet data as normal
    print(packet)

In this example, we are decoding all packets on UDP port 1234 as MyCustomProtocol. The decode_as() method is called before iterating over the packet capture using a for loop.

Conclusion

Pyshark provides an easy-to-use interface for decoding network packet data using custom protocols. The decode_as() method can be used to specify the desired protocol and port, allowing for easy analysis of captured packet data.