- Fix ReadTimeout/WriteTimeout to use 5*time.Second instead of 5 (nanoseconds)
- Add RootHints fallback in DiscoverRoots() when queryResolver fails
- Validate --dns-upstream is a valid host:port in Config.Validate()
- Update systemResolver() comment to note it is Unix-only (/etc/resolv.conf)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: multica-agent <github@multica.ai>
- Replace hardcoded 127.0.0.1:53 in systemResolver() with actual system
DNS from /etc/resolv.conf (falls back to 127.0.0.1:53 if unavailable)
- Add Resolver field to RootDiscoveryConfig so callers can override the
upstream resolver used during root server discovery
- Add --dns-upstream flag (e.g. --dns-upstream 8.8.8.8:53) to exploredns
CLI and DNSUpstream field to Config
- Add internal/dns/hints.go with all 13 IANA root server IPv4/IPv6
addresses as embedded constants (RootHints []RootServer)
- Update tests: fix real_exchange_test.go call site; add hints_test.go
covering RootHints correctness and resolver helper functions
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: multica-agent <github@multica.ai>
Add text and JSON formatters with real-time progress via traverser hooks,
summary statistics, and CLI integration for --show-* and --json flags.
Co-authored-by: multica-agent <github@multica.ai>
Add Resolver interface, BasicResolver, and CachingResolver to internal/dns.
CachingResolver wraps any Resolver with an in-memory cache keyed by
(server IP, name, type, class). Cache entries respect DNS TTL from
responses, falling back to a configurable default TTL. Thread-safe
using sync.RWMutex. Includes Len, Clear, and PurgeExpired methods
for cache management.
Closes HAN-379 (Phase 2.2).
Co-authored-by: multica-agent <github@multica.ai>
Add RootServer struct and DiscoverRoots function that queries the local
resolver for NS records of the root zone, resolves each root name to
A/AAAA addresses, and returns a list of RootServer structs.
Supports:
- Default: discovers a single root server from local resolver
- --root-server override to target a specific root server
- --all-root-servers to discover all 13 root servers
- --root-aaaa flag to include IPv6 addresses
Includes unit tests for all helper functions and integration tests
that skip gracefully when no resolver is available.
Co-authored-by: multica-agent <github@multica.ai>
multica-agent
gary