Как разобрать rtp пакеты python

rtp 0.0.3

This python library provides a means to decode, encode, and interact with RTP packets. It is intended to be used together with other libraries that decode, encode, and interact with the payload bitstreams. This library does not provide any network functionality.

Installation

Example usage

Contributing

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RTP (Real-time Transport Protocol): Python parsing library

The Real-time Transport Protocol (RTP) is a widely used network protocol for transmitting audio or video. It usually works with the RTP Control Protocol (RTCP). The transmission can be based on Transmission Control Protocol (TCP) or User Datagram Protocol (UDP).

KS implementation details

References

This page hosts a formal specification of RTP (Real-time Transport Protocol) using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.

Overview
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Usage

Runtime library

All parsing code for Python generated by Kaitai Struct depends on the Python runtime library. You have to install it before you can parse data.

The Python runtime library can be installed from PyPI:

Parse a local file and get structure in memory:

Or parse structure from a bytes:

After that, one can get various attributes from the structure by invoking getter methods like:

How to use scapy to analyze sip/rtp packet?

I am trying to write a python script using scapy(not pyshark) library to live capture the packet and extract the information. Any idea how to use scapy(jython/python) to analyze sip/rtp packet?

To make it more clearly, I had a sample code to analyse the rtp packet which use Pyshark as following:

cap = pyshark.LiveCapture(interface=’en0′, display_filter=’sip’)

Can this code be transferred to Scapy instead of Pyshark with the same function?

1 Answer 1

Kenneth, To start with you need some packet capture — you can do this in scapy — or using Wireshark etc. I now assume that you have a file in PCAP (or PCAPNG) format. I have also assumed that in Wireshark you are not filtering — but recording everything.

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Audioodg exe что такое

So inside Scapy you will write something like this.

But I can not see a Layer definition for SIP inside Scapy — which means you will need to develop it yourself.