Diameter codec - encoder & decoder

• codec is based on RFC https://datatracker.ietf.org/doc/html/rfc6733
• no third party py libs dependencies
• very simple and straightforward to use
• python support: >= 3.6

How to setup dev env

• apt install python3.6
• apt install python3.6-venv
• source venv/bin/activate
• pip install -r requirements.txt
• pylint src/main/python/codec/diameter/ --ignored-classes=_socketobject *.py

How to build project

• pyb -v
• pyb -Q

How to upload project to test.pypi with twine

• python -m twine upload --repository-url https://test.pypi.org/legacy/ target/dist/diameter-codec-<x.y.z>/dist/*

How to upload project to pypi with twine (production)

• python -m twine upload target/dist/diameter-codec-<x.y.z>/dist/*

How to push git tag

• git push origin v<x.y.z>

How to encode and decode Capabilities-Exchange message

import os  
import typing    
from codec.diameter.diameter import DiameterHeader, Diameter, Avp  
from codec.diameter.dictionary import DictionaryLayout, DefaultDictionaryLayout	
cer_request: typing.Tuple = (  
  Avp("Product-Name", "hello"),  
  Avp("Origin-Realm", "zte.com.cn"),  
  Avp("Origin-Host", "dmtsrv001.zte.com.cn"),  
  Avp("Host-IP-Address", "192.168.0.1"),  
  Avp("Vendor-Id", 10415),  
  Avp("Product-Name", "dummy-product"),  
  Avp("Inband-Security-Id", 1),  
  Avp("Vendor-Specific-Application-Id", (  
     Avp("Vendor-Id", 10415),  
     Avp("Acct-Application-Id", 1),  
     Avp("Auth-Application-Id", 1),  
  )),  
  Avp("Vendor-Specific-Application-Id", (  
     Avp("Auth-Application-Id", 2),  
     Avp("Acct-Application-Id", 2),  
     Avp("Vendor-Id", 10415),  
  )),  
)
header: DiameterHeader = DiameterHeader(application_id=0, command_code=257, avp_set=cer_request)
xml_dict_path: str = <path to diameter xml file>  
dictionary_layout: DictionaryLayout = DefaultDictionaryLayout(xml_dict_path)  
diameter: Diameter = Diameter(dictionary_layout)
encoded_header: bytes = self.diameter.encode(header) #	send to TCP server     
decoded_header: DiameterHeader = diameter.decode(encoded_header) # decoded on TCP server