From 359f6a1cba3f2e281cefa727db34e3497dc15a2c Mon Sep 17 00:00:00 2001
From: radhitya <alif@radhitya.org>
Date: Thu, 18 Jun 2026 18:17:19 +0700
Subject: add custom forwarders

---
 internal/config/config.go | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'internal/config')

diff --git a/internal/config/config.go b/internal/config/config.go
index f2624c2..1fa8069 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -27,8 +27,10 @@ type CacheConfig struct {
 }
 
 type ResolverConfig struct {
+	Mode		string `toml:"mode"`
 	Timeout        string `toml:"timeout"`
 	MaxDelegations int    `toml:"max_delegations"`
+	Forwarders []string `toml:"forwarders"`
 }
 
 type BlocklistConfig struct {
@@ -71,6 +73,7 @@ func Default() Config{
 			MaxEntries: 100000,
 		},
 		Resolver: ResolverConfig{
+			Mode: "recursive",
 			Timeout: "2s",
 			MaxDelegations: 30,
 		},
@@ -111,6 +114,12 @@ func Merge(dst, src Config) Config {
 	if src.Resolver.MaxDelegations > 0 {
 		dst.Resolver.MaxDelegations = src.Resolver.MaxDelegations
 	}
+	if src.Resolver.Mode != "" {
+		dst.Resolver.Mode = src.Resolver.Mode
+	}
+	if len(src.Resolver.Forwarders) > 0 {
+		dst.Resolver.Forwarders = src.Resolver.Forwarders
+	}
 	if src.Blocklist.Response != "" {
 		dst.Blocklist.Response = src.Blocklist.Response
 	}
@@ -148,5 +157,15 @@ func (c Config) Validate() error {
 	default:
 		return fmt.Errorf("invalid blocklist response %q (want zero_ip or nxdomain)", c.Blocklist.Response)
 	}
+
+	switch c.Resolver.Mode {
+	case "recursive", "forward", "":
+		// nothing happened lol
+	default:
+		return fmt.Errorf("invalid resolver mode %q (recursive or forward)", c.Resolver.Mode)
+	}
+	if c.Resolver.Mode == "forward" && len(c.Resolver.Forwarders) == 0 {
+		return fmt.Errorf("resolver mode=forward requires at least one forwarder")
+	}
 	return nil
 }
-- 
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