free5gc-fsm-sample
This repository aims to understand how free5gc works
According to following diagram ...
When receiving NAS message from RAN, AMF on free5gc needs to handle proper procedures
I wish it will be useful for understanding it
How to Run
You can confirm how FSM works as following
% go run main.go
... Send Event: [GmmMessageEvent], after receiving [NAS-PDU: Registration request]
Receiving Event: [Gmm Message] on DeRegistered
... Send Event: StartAuthEvent
Receiving Event: [Exit event] on DeRegistered
Receiving Event: [Start Authentication] on DeRegistered
Receiving Event: [Entry event] on Authentication
(Receiving Event: AuthRestartEvent on Authentication)
... Send Event: [GmmMessageEvent], after receiving [NAS-PDU: Authentication Response]
Receiving Event: [Gmm Message] on Authentication
... Send Event: AuthSuccessEvent
Receiving Event: [Exit event] on Authentication
Receiving Event: [Authentication Success] on Authentication
Receiving Event: [Entry event] on SecurityMode
... Send Event: [GmmMessageEvent], after receiving [NAS-PDU: Security mode complete]
Receiving Event: [Gmm Message] on SecurityMode
... Send Event: SecurityModeSuccessEvent
Receiving Event: [Exit event] on SecurityMode
Receiving Event: [SecurityMode Success] on SecurityMode
Receiving Event: [Entry event] on ContextSetup
... Send Event: [GmmMessageEvent], after receiving [NAS-PDU: Registration complete]
Receiving Event: [Gmm Message] on ContextSetup
... Send Event: ContextSetupSuccessEvent
Receiving Event: [Exit event] on ContextSetup
Receiving Event: [ContextSetup Success] on ContextSetup
Receiving Event: [Entry event] on Registered