* refactor: extract resolve_coalesced, rewrite tests against real code
Extract Disposition enum, acquire_inflight(), and resolve_coalesced()
from handle_query so coalescing logic is independently testable. Rewrite
integration tests to call resolve_coalesced directly with mock futures
instead of fighting the iterative resolver's NS chain. All 12 coalescing
tests now exercise production code paths, not tokio primitives.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: SERVFAIL echoes question section, preserve error messages
resolve_coalesced now takes &DnsPacket instead of query_id so SERVFAIL
responses use response_from (echoing question section per RFC). Error
messages preserved via Option<String> return for upstream error logging.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
* feat: in-flight query coalescing for recursive resolver
When multiple queries for the same (domain, qtype) arrive concurrently
and all miss the cache, only the first triggers recursive resolution.
Subsequent queries wait on a broadcast channel for the result.
Prevents thundering herd where N concurrent cache misses each
independently walk the full NS chain, compounding timeouts.
Uses InflightGuard (Drop impl) to guarantee map cleanup on
panic/cancellation — prevents permanent SERVFAIL poisoning.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* style: add InflightMap type alias for clippy
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* feat: add COALESCED query path and coalescing tests
Followers in the inflight coalescing path now log as COALESCED instead
of RECURSIVE, making it visible in the dashboard when queries were
deduplicated vs independently resolved. Adds 10 tests covering
InflightGuard cleanup, broadcast mechanics, and concurrent handle_query
coalescing through a mock TCP DNS server.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* style: cargo fmt
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* refactor: extract acquire_inflight, rewrite tests against real code
Move Disposition enum and inflight acquisition logic into a standalone
acquire_inflight() function. Rewrite 4 tests that were exercising tokio
primitives to call the real coalescing code path instead.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- DNS-level ad blocking: 385K+ domains via Hagezi Pro blocklist, subdomain
matching, one-click allowlist, pause/toggle, background refresh every 24h
- Live dashboard at :5380 with real-time stats, query log, override
management (create/edit/delete), blocking controls
- System DNS auto-discovery: parses scutil --dns on macOS to find
conditional forwarding rules (Tailscale, VPN split-DNS)
- REST API expanded to 18 endpoints (blocking, overrides, diagnostics)
- Startup banner with colored system info
- Performance benchmarks (bench/dns-bench.sh)
- Landing page updated with new positioning and comparison table
- CI, Dockerfile, LICENSE, development plan docs
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
