Diameter Processing with Kamailio
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This document discusses using Kamailio to process Diameter requests. It begins by introducing Diameter and its role in IMS and mobile networks. It then addresses using Kamailio as a Diameter router, noting that Kamailio has a good Diameter stack and interfaces to other systems. The document describes an IMS Diameter server based on Kamailio that allows processing Diameter requests and responses in the Kamailio script. Examples are given of building an HSS, PCRF, DRA, or OCS using this approach. The history of the author's HSS servers is discussed, moving from OpenHSS to JBoss to a faster Kamailio-based solution. Future plans include adding TLS,
![Doing Diameter in Kamailio Script
• Requests go to an Event-Route:
– event_route[diameter:request]
• We‘ve got the following Variables:
– $diameter_application – the application ID
– $diameter_command – the Command Code
– $diameter_request – the Diameter-Payload
– $diameter_response – here goes the answer
• Send a request:
– diameter_request(<appid>, <command>, <diameter-
payload>)](https://image.slidesharecdn.com/diameterprocessingwithkamailio-170713122401/85/Diameter-Processing-with-Kamailio-9-320.jpg)
Diameter Processing with Kamailio
- 1. Diameter Processing with Kamailio Kamailio World 2017
- 2. Let‘s make Kamailio great again! …let‘s add Diameter!
- 3. What is Diameter? • Diameter is the double of the RADIUS • Diameter is the evolution of RADIUS • In IMS and Mobile Networks, Diameter is everywhere: – Home Subscriber Server – the central provisioning database (Cx-/Dx-Interfaces) – Policy & Charging (Rx, Ro, Rf-Interfaces) – Applications (Sh-Interfaces)
- 4. Wtf? Do you really want to do everything with Kamailio?
- 5. Kamailio is a SIP-Router… …why do you want to do Diameter?
- 6. Kamailio is much more than SIP • Kamailio has a very good Diameter Stack • Kamailio has various Interfaces to other Systems, e.g. – RabbitMQ – Databases – No-SQL-Databases – REST – HTTP Server – …
- 7. Let‘s look at Diameter
- 8. Introducing the IMS-Diameter-Server • Based on Kamailio • You define in the Kamailio-Script what to do with the Request – it‘s up to you! • Diameter is translated to JSON and back • It allows you to: – Process Requests and generate answer – Send Requests to a Diameter Peer
- 9. Doing Diameter in Kamailio Script • Requests go to an Event-Route: – event_route[diameter:request] • We‘ve got the following Variables: – $diameter_application – the application ID – $diameter_command – the Command Code – $diameter_request – the Diameter-Payload – $diameter_response – here goes the answer • Send a request: – diameter_request(<appid>, <command>, <diameter- payload>)
- 10. What can you build with it? • A Home-Subscriber Server (HSS) • A Policy & Charging Rules Function (PCRF) • Diameter Routing-Agent (DRA) • Online- or Offline Charging Server (OCS) • Sh-Client – for Applications Any Diameter Application!
- 11. History on our HSS-Servers • Initially we used the OpenHSS from Fraunhofer – This works, but it‘s not the fastest solution • Later we replaced it with Jboss / Mobicents / JDiameter – This was much faster – Install and forget, don‘t touch the system – Never open-source, it had too many „Todos“
- 12. The Kamailio HSS Server • Diamer-Gateway – of course Kamailio! • Worker Processes – Implemented in PHP – Flexible and easy to adapt – Scale up? Add more workers – Extremely fast
- 13. Roadmap IMS_diameter_server: • Add native TLS • Add native SCTP • Homer Integration Applications: • Add Sh to the HSS • Implement a PCRF Simulator (Rx-Testing) • Deep Integration into our Amarisoft Lab Femto-Cell (HSS) Mid-Term: • Migrate OCS to the IMS_diameter_server Architecture
- 14. It‘s all open-source! • You‘ll find all components on GitHub*: • https://github.com/ngvoice *) Shortly: We will push it later this week.