f676cc9458
Implements the full monitoring loop: - Immediate checks on startup, then periodic DNS+port and TLS cycles - Domain NS change detection with notifications - Per-nameserver hostname record tracking with change/failure/recovery and inconsistency detection - TCP port 80/443 monitoring with state change notifications - TLS certificate monitoring with change, expiry, and failure detection - State persistence after each cycle - First run establishes baseline without notifications - Graceful shutdown via context cancellation Defines DNSResolver, PortChecker, TLSChecker, and Notifier interfaces for dependency injection. Updates main.go fx wiring and resolver stub signature to match per-NS record format. Closes #2
65 lines
1.4 KiB
Go
65 lines
1.4 KiB
Go
// Package resolver provides iterative DNS resolution from root nameservers.
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package resolver
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import (
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"context"
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"errors"
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"log/slog"
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"go.uber.org/fx"
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"sneak.berlin/go/dnswatcher/internal/logger"
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)
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// ErrNotImplemented indicates the resolver is not yet implemented.
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var ErrNotImplemented = errors.New("resolver not yet implemented")
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// Params contains dependencies for Resolver.
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type Params struct {
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fx.In
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Logger *logger.Logger
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}
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// Resolver performs iterative DNS resolution from root servers.
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type Resolver struct {
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log *slog.Logger
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}
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// New creates a new Resolver instance.
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func New(
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_ fx.Lifecycle,
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params Params,
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) (*Resolver, error) {
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return &Resolver{
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log: params.Logger.Get(),
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}, nil
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}
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// LookupNS performs iterative resolution to find authoritative
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// nameservers for the given domain.
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func (r *Resolver) LookupNS(
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_ context.Context,
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_ string,
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) ([]string, error) {
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return nil, ErrNotImplemented
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}
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// LookupAllRecords performs iterative resolution to find all DNS
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// records for the given hostname, keyed by authoritative nameserver.
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func (r *Resolver) LookupAllRecords(
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_ context.Context,
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_ string,
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) (map[string]map[string][]string, error) {
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return nil, ErrNotImplemented
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}
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// ResolveIPAddresses resolves a hostname to all IPv4 and IPv6
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// addresses, following CNAME chains.
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func (r *Resolver) ResolveIPAddresses(
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_ context.Context,
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_ string,
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) ([]string, error) {
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return nil, ErrNotImplemented
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}
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