Does anyone have an idea about a software for Linux that uses COTP (ISO 8073) protocol ? note : software that runs COTP over TCP , doesn't matter what is the functionality of the software i just need to analyze the traffic of the protocol .

1 Answer 1


ISO 8073 is commonly known-as TP4. One possible open implementation for linux is the ATN project on sourceforge. Quoting their README:


CLNP stands for connectionless network protocol, whereas TP4 stands for transport protocol type 4, which is a connection-oriented transport protocol. They are networking protocols defined respectively in the network layer and the transport layer of the Open Systems Interconnection (OSI) framework of the International Organization for Standardization (ISO). CLNP is standardized in ISO/IEC 8473-1, whereas COTP (TP4) is standardized in ISO/IEC 8073. As an analogy to the Internet networking protocol suite, CLNP is just like IP, whereas TP4 is just like TCP. They are used as the communication protocols in the digital data communication systems of the ATN because the ATN follows the ISO OSI standards.


Because the ICAO requires the use of communication protocols based on the ISO OSI standards in the ATN as stated in Annex X to the Convention on International Civil Aviation. Specifically, the second edition of Annex X Volume III Part I, which is titled Digital Data Communication Systems, in July 2007 states:

 3.2.1 The aeronautical telecommunication network (ATN) comprises application
entities and communication services which allow ground, air-to-ground and
avionics data subnetworks to interoperate by adopting common interface
services and protocols based on the International Organization for
Standardization (ISO) open systems interconnection (OSI) reference model.


To provide the implementation of the ATN TP4/CLNP Networking Suite for the Linux kernel in the spirit of the free software movement so that you are free to:

  • run the program for any purpose (freedom 0)
  • study how the program works, and adapt it to your needs (freedom 1)
  • redistribute copies so you can help your neighbor (freedom 2)
  • improve the program, and release your improvements to the public, so that the whole community benefits (freedom 3)

Note, someone might be quick to point out this question on SO; however, that project seems to require a password to see their SVN repo, and the blog is gone.

  • ill try it and get back to u, thanks. Commented Aug 1, 2014 at 8:15
  • i can't get it to compile although i did what they say in the readme . Commented Aug 3, 2014 at 9:47

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