Adding support SNMPv3

[kh0mka]

📑 I have found these related issues/pull requests

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🏷️ Feature Request Type

Change to existing monitor

🔖 Feature description

Current supported SNMP versions: v1, v2c. SMNPv3 support is required. Enable all possible authentication methods: noAuthNoPriv, authNoPriv, and authPriv.

✔️ Solution

Adding support SNMPv3

❓ Alternatives

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📝 Additional Context

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[CommanderStorm]

Shure, adding v3 should be as simple as adding it to the frontend and maybe updating the snmp-net dependency.
I would love your contribution on this

For the auth methods, you will need to look into how hard this is.
Please put them in a separate PR with tests that this works, unless it is very trivial.

[querysmith-sys]

Hi, @CommanderStorm I’m interested in contributing as well.
I plan to start with backend support for SNMPv3 noAuthNoPriv, and then handle auth methods in a separate PR as suggested.
I’ll post progress here to avoid duplication.
Please let me know if this approach sounds reasonable.

[CommanderStorm]

Sounds resonable.
Please consider adding a testcase for this, as I don't know enough about snmpv3 to test if this works correctly.

[querysmith-sys]

Thanks!
I hav verified the UI changes locally (SNMPv3 selectable, correct fields shown).
I’ll add a mocked test to ensure the SNMPv3 noAuthNoPriv code path uses createV3Session with the correct security level, since real SNMPv3 devices aren’t practical to test locally.