NSE Composition: Translation client for the passthrough NSE

[Bolodya1997]

Overview

Translation client for the passthrough NSE should set new ConnectionContext as it is done for { Mechanism, MechanismPreferences } in mechanismtranslation.

References

• mechanism translation client - https://github.com/networkservicemesh/sdk/blob/main/pkg/networkservice/common/mechanismtranslation/client.go

Tests

1. Unit tests for the new client.
2. (?) Sandbox tests.

[edwarnicke]

I'm a little confused here... why is this needed? Current behavior simply passes through the ConnectionContext, which is the correct behavior for NSMgr, Forwarder, and PassThrough NSEs...

[Bolodya1997]

@edwarnicke
I suppose that for the simple IP forwarder passthrough NSE we will have one of these schemes:


Where yellow highlight means IP context specific for NSC -> NSE-1 IP connection and green highlight means IP context specific for NSE-1 -> NSE-2 IP connection.
So we have different src/dst IP, different src/dst Routes for these connections and it probably should mean that we want to switch ConnectionContext when we are switching the connection on NSE-1.