feat(dns): replace unbound with qdm12/dns@v2.0.0-beta-rc6 (#1742)

- Faster start up
- Clearer error messages
- Allow for more Gluetun-specific customization
- DNSSEC validation is dropped for now (it's sort of unneeded)
- Fix #137

internal/dns/update.go

@@ -1,35 +1,46 @@
 package dns
 
-import "context"
+import (
+	"context"
+	"fmt"
+
+	"github.com/qdm12/dns/v2/pkg/blockbuilder"
+	"github.com/qdm12/dns/v2/pkg/middlewares/filter/update"
+)
 
 func (l *Loop) updateFiles(ctx context.Context) (err error) {
-	l.logger.Info("downloading DNS over TLS cryptographic files")
-	if err := l.conf.SetupFiles(ctx); err != nil {
-		return err
-	}
 	settings := l.GetSettings()
 
-	unboundSettings, err := settings.DoT.Unbound.ToUnboundFormat()
-	if err != nil {
-		return err
-	}
-
 	l.logger.Info("downloading hostnames and IP block lists")
-	blacklistSettings, err := settings.DoT.Blacklist.ToBlacklistFormat()
+	blacklistSettings := settings.DoT.Blacklist.ToBlockBuilderSettings(l.client)
+
+	blockBuilder, err := blockbuilder.New(blacklistSettings)
+	if err != nil {
+		return fmt.Errorf("creating block builder: %w", err)
+	}
+
+	result := blockBuilder.BuildAll(ctx)
+	for _, resultErr := range result.Errors {
+		if err != nil {
+			err = fmt.Errorf("%w, %w", err, resultErr)
+			continue
+		}
+		err = resultErr
+	}
+
 	if err != nil {
 		return err
 	}
 
-	blockedHostnames, blockedIPs, blockedIPPrefixes, errs :=
-		l.blockBuilder.All(ctx, blacklistSettings)
-	for _, err := range errs {
-		l.logger.Warn(err.Error())
+	updateSettings := update.Settings{
+		IPs:        result.BlockedIPs,
+		IPPrefixes: result.BlockedIPPrefixes,
+	}
+	updateSettings.BlockHostnames(result.BlockedHostnames)
+	err = l.filter.Update(updateSettings)
+	if err != nil {
+		return fmt.Errorf("updating filter: %w", err)
 	}
 
-	// TODO change to BlockHostnames() when migrating to qdm12/dns v2
-	unboundSettings.Blacklist.FqdnHostnames = blockedHostnames
-	unboundSettings.Blacklist.IPs = blockedIPs
-	unboundSettings.Blacklist.IPPrefixes = blockedIPPrefixes
-
-	return l.conf.MakeUnboundConf(unboundSettings)
+	return nil
 }