feat(client): persist virtual MAC identity

Remote clients need a stable locally administered MAC address so the relay,
gateway, DHCP lease, and LAN peers keep seeing the same tunnel identity across
runs. Requiring users to pass `--virtual-mac` made that responsibility manual.

Add a platform-neutral client identity store that loads a JSON identity file or
generates a new valid virtual MAC with OS randomness and persists it. The file
stores the MAC in the same string form shown by the CLI. The Windows client now
uses `lanparty-client-identity.json` by default while keeping `--virtual-mac` as
a manual test override.

TAP binding still remains future work; this slice only owns the client identity
that will be assigned to the TAP adapter.

Test Plan:
- cargo fmt --check
- cargo test --workspace
- cargo clippy --workspace --all-targets -- -D warnings
- git diff --check

Refs: PLAN.md MAC identity

This commit is contained in:

ddidderr

2026-05-21 18:35:20 +02:00

parent 25157ad1a6

commit a3d24a1173

6 changed files with 196 additions and 10 deletions

									
										Cargo.toml
									
		+1
		
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				@@ -18,6 +18,7 @@ edition = "2024"

				anyhow = "1"

				bytes = "1"

				clap = { version = "4.6.1", features = ["derive"] }

				getrandom = "0.3.4"

				libc = "0.2"

				quinn = "0.11.9"

				rcgen = "0.14.8"