# Task 1 Report: Cached OUI Identity Resolution

## Status

Implemented and verified cached local OUI identity resolution while preserving the existing `oui_vendor()` behavior and unrelated unstaged HTML report changes.

## Checklist

- [x] Added failing resolver tests before production changes.
- [x] Verified the tests failed because `OUI_DATA_PATHS` and `oui_identity()` were absent.
- [x] Added Nmap and macchanger data paths.
- [x] Added a lazy process-level identity cache.
- [x] Added local database parsing for plain and separated OUI prefixes.
- [x] Preserved Nmap precedence over macchanger and built-in fallback.
- [x] Added local/randomized and unknown identities.
- [x] Returned JSON-safe dictionaries with `manufacturer`, `model`, `oui`, and `source`.
- [x] Kept `model` as `None` for every source.
- [x] Preserved `oui_vendor()` behavior.
- [x] Ran focused and regression tests.
- [x] Self-reviewed the diff and checked whitespace.

## TDD Evidence

Initial command:

```text
python3 -m unittest tests.test_recon.OuiVendorTest -v
```

Initial result before implementation:

```text
Ran 8 tests in 0.005s

FAILED (errors=3)
```

All three new identity tests errored at `mock.patch.object(server, 'OUI_DATA_PATHS', ...)` with:

```text
AttributeError: <module 'server' ...> does not have the attribute 'OUI_DATA_PATHS'
```

After the minimal implementation, the focused resolver test result was:

```text
python3 -m unittest tests.test_recon.OuiVendorTest -v

Ran 9 tests in 0.005s

OK
```

## Final Verification

Command:

```text
python3 -m unittest tests.test_recon.DecodersTest -v
```

Output:

```text
test_decode_encryption_cases (tests.test_recon.DecodersTest.test_decode_encryption_cases) ... ok
test_decode_ssid_bytes_and_str (tests.test_recon.DecodersTest.test_decode_ssid_bytes_and_str) ... ok
test_decode_ssid_cli_escapes (tests.test_recon.DecodersTest.test_decode_ssid_cli_escapes) ... ok
test_fmt_mac_colon_form (tests.test_recon.DecodersTest.test_fmt_mac_colon_form) ... ok
test_fmt_mac_noop (tests.test_recon.DecodersTest.test_fmt_mac_noop) ... ok
test_norm_mac_12hex (tests.test_recon.DecodersTest.test_norm_mac_12hex) ... ok

----------------------------------------------------------------------
Ran 6 tests in 0.005s

OK
```

Command:

```text
python3 -m unittest tests.test_recon -v
```

Output summary:

```text
----------------------------------------------------------------------
Ran 119 tests in 0.681s

OK
```

All 119 individual tests printed `... ok`; there were no failures, errors, or warnings.

Command:

```text
git diff --check
```

Output: no output; exit status 0.

## Self-Review

- Local/randomized detection occurs before cache loading, avoiding unnecessary file access.
- Cache precedence follows path order and never overwrites an earlier prefix.
- Missing files are skipped without masking parsing or programming errors.
- Unknown and invalid MACs return JSON-safe values.
- `AA` was not used as the unknown global test prefix because its locally administered bit is set; `AC` correctly represents a globally administered unknown prefix.
- Existing unstaged HTML signal-ordering changes in `server.py` and `tests/test_recon.py` are intentionally excluded from the Task 1 commit.

## Concerns

None. Database source labels rely on the specified two-entry `OUI_DATA_PATHS` ordering.

## Live Path Correction

The committed Task 1 diff used `/usr/share/macchanger/OUI.list`, but the design
specification and live macchanger package use
`/usr/share/macchanger/wireless.list`. Updated `OUI_DATA_PATHS` to the required
live path. Resolver tests patch `OUI_DATA_PATHS`, so no test changes were needed.

Verification after the correction:

```text
python3 -m unittest tests.test_recon.OuiVendorTest -v

Ran 9 tests in 0.005s

OK
```

```text
python3 -m unittest tests.test_recon -v

Ran 119 tests in 0.498s

OK
```

The unrelated unstaged HTML signal-ordering changes in `server.py` and
`tests/test_recon.py`, plus untracked loot and certificate files, remain
excluded from this correction.