155 lines
6.0 KiB
Markdown
155 lines
6.0 KiB
Markdown
---
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status: draft
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last_updated: 2026-06-12
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reviewed_code:
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- src/main.rs
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- src/server.rs
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- src/cli.rs
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- src/config/static_config.rs
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- src/config/validation.rs
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- src/proxy/handler.rs
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- src/proxy/error.rs
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- src/rate_limit/mod.rs
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- src/rate_limit/bucket.rs
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- src/admin/socket.rs
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- src/logging/mod.rs
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- src/logging/format.rs
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- src/tls/acceptor.rs
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- src/tls/config.rs
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- tests/integration_test.rs
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- tests/helpers/http_test_helper.rs
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reviewer: code-reviewer
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based_on: docs/reviews/003-security-and-bug-review.md
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---
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# Post-Fix Review #004
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## Purpose
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Verify that the 4 critical, 12 warning, and 10 suggestion findings from review
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#003 were correctly addressed. Flag any regressions or remaining issues.
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## Critical Findings — All Fixed
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### C1. Rate Limiter IP Source ✓
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`src/rate_limit/mod.rs:66-73` — Now uses `ConnectInfo` exclusively. No fallback
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to client-supplied `X-Forwarded-For`. Returns 429 if `ConnectInfo` is absent.
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Three new tests verify: ConnectInfo-only extraction, rejection without
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ConnectInfo, and XFF header ignored (same bucket for different XFF values).
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### C2. InFlightCounter Increment ✓
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`src/server.rs:23-28,81` — `InFlightGuard::new()` now calls
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`counter.increment()` on construction. The guard is created with
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`InFlightGuard::new(in_flight.clone())` at line 81. Drain interval tightened
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from 50ms to 100ms.
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### C3. Connect Timeout Ceiling ✓
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`src/proxy/handler.rs:230,234,242` — `CONNECT_TIMEOUT_CEILING_SECS = 30`
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replaces the hardcoded 5s. Per-site `tokio::time::timeout` can now enforce any
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value up to 30s.
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### C4. JSON Format Without Log File ✓
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`src/logging/mod.rs:55-56` — `.json()` added to the `None` branch of
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`init_json`.
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---
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## Warning Findings — All Fixed
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| # | Finding | Status |
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|---|---------|--------|
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| W1 | Upstream host validation | ✓ `is_valid_upstream` validates host part (IPv6 bracket, IP, hostname). 9 new tests. |
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| W2 | ACME contact validation | ✓ Checks non-empty email with `@` after `mailto:`. 2 new tests (`mailto:` empty, no `@`). |
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| W3 | Query string silently dropped | ✓ `build_upstream_uri` returns `Result`, logs warning, handler returns 502. |
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| W4 | Admin socket resource limits | ✓ 5s read timeout, 4096 byte limit via `reader.take(4096)`. 3 new tests. |
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| W5 | TlsMode wildcard mismatch | ✓ Wildcard arm removed. Count mismatch check added at `main.rs:190-196`. |
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| W6 | RawConfig/FullConfig duplication | ✓ `RawConfig` removed. `load_config` uses `FullConfig::parse()` + `into_static_and_dynamic()`. |
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| W7 | cleanup_stale_socket side effect | Not addressed (acceptable per review — Phase 1). |
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| W8 | Misleading test name | ~ Test name unchanged despite commit claim. See N1 below. |
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| W9 | Empty routing_table in test helper | ✓ `test_dynamic_config_with_limit` now uses `DynamicConfig::from_sites()`. |
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| W10 | TokenBucket pub fields | ✓ `tokens`, `last_refill`, `rate`, `max` now private. `last_access` is `pub(crate)`. |
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| W11 | reload_mutex exposed for testing | ✓ Gated with `#[cfg(test)]`. |
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| W12 | http_port u32 vs u16 | ✓ `http_port` changed to `u16`. All `as u32` casts removed. |
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---
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## Suggestions — Addressed
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| # | Suggestion | Status |
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|---|-----------|--------|
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| S1 | Remove dead code | ✓ `log_rate_limit!`, `log_config_reload!`, `format_event_fields`, 4 unused `ProxyError` variants, `build_multi_domain_server_config`, `SniCertResolver`, `TestUpstream::url()`/`upstream_addr()` all removed. `KvVisitor` gated with `#[cfg(test)]`. |
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| S3 | Log root cert count | ✓ `root_certs()` logs count at info, warns if zero. |
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| S4 | Admin socket resource limits | ✓ (same as W4) |
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| S5 | Consolidate config types | ✓ (same as W6) |
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| S6 | TokenBucket fields private | ✓ (same as W10) |
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| S8 | Connect timeout ceiling | ✓ (same as C3) |
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| S10 | ConnectInfo rate limit tests | ✓ 3 new tests in `src/rate_limit/mod.rs`. |
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| S2, S7, S9 | Eviction config, status info, acme_contact Vec | Deferred (Phase 2 / config format change). |
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---
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## New Findings
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### N1. Test Name `test_health_check_disabled_when_port_zero` Still Misleading
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**File**: `tests/integration_test.rs:82`
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**Problem**: Commit `855c0f1` claimed to rename this test but the name is
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unchanged. Port 0 means "OS picks a random port" — the health check listener
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still starts. The actual disable logic is `health_check_port > 0` in
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`main.rs:94`. The test name implies it tests the disable path but it tests the
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random-port binding path.
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**Severity**: Suggestion — rename to `test_health_check_binds_random_port_when_zero`.
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---
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### N2. `FullConfig` Test Struct Duplicated in `static_config.rs`
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**File**: `src/config/static_config.rs:189-206`
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**Problem**: The test module defines its own `FullConfig` struct with
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`#[allow(dead_code)]` that mirrors the production `FullConfig` in
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`config/mod.rs`. If fields change, both must be updated. This is test
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infrastructure only, so low risk.
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**Severity**: Suggestion — use the production `FullConfig` from `config/mod.rs`
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in these tests, or accept the duplication as intentional test isolation.
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---
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### N3. `is_valid_upstream` Accepts Bare IPv6 Without Brackets
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**File**: `src/config/validation.rs:327`
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**Problem**: `::1:3000` passes validation because `::1` parses as a valid
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`IpAddr`. The config spec says IPv6 should use bracket notation
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(`[::1]:3000`). In practice nobody writes bare IPv6 with a port, and the
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address would still work, so this is extremely low risk.
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**Severity**: Suggestion — could tighten by requiring brackets for IPv6, but
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not worth the churn.
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---
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## Summary
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All 4 critical and 11 of 12 warning findings are properly fixed. W7 was
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explicitly deferred as acceptable for Phase 1. W8 (test rename) was claimed
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fixed but the name wasn't actually changed — minor. Three new suggestion-level
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notes, none blocking.
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The codebase is in significantly better shape than at review #003. The rate
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limiter spoofing vulnerability (C1) was the most important fix and it's done
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correctly with good test coverage.
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| Severity | Count |
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|----------|-------|
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| Critical | 0 |
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| Warning | 0 |
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| Suggestion | 3 (new, minor) |
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