lib/dns: remove DebugLevelDNS

The DebugLevelDNS log the error on DNS level, for example empty answer,
error on name, class not implemented, refused; which is now on by
default.

3 files changed, 13 insertions, 15 deletions

diff --git a/CHANGELOG.adoc b/CHANGELOG.adoc
index 805fd45f..dc6d0ccb 100644
--- a/CHANGELOG.adoc
+++ b/CHANGELOG.adoc
@@ -38,6 +38,12 @@ Legend,
 [#v0_61_0]
 == pakakeh.go v0.61.0 (2026-xx-xx)
 
+**🌼 lib/dns: remove DebugLevelDNS**
+
+The DebugLevelDNS log the error on DNS level, for example empty answer,
+error on name, class not implemented, refused; which is now on by
+default.
+
 **🌼 lib/dns: add option to set hook on server when receiving answer**
 
 The hook function, OnAnswerReceived, will be triggered when server
diff --git a/lib/dns/server.go b/lib/dns/server.go
index f834a38b..e4dcbac5 100644
--- a/lib/dns/server.go
+++ b/lib/dns/server.go
@@ -557,9 +557,7 @@ func (srv *Server) serveTCPClient(logp string, cl *TCPClient, kind string) {
 func (srv *Server) isImplemented(msg *Message) bool {
 	switch msg.Question.Class {
 	case RecordClassCH, RecordClassHS:
-		if srv.opts.Debug&DebugLevelDNS != 0 {
-			log.Printf(`dns: class %d is not implemented`, msg.Question.Class)
-		}
+		log.Printf(`dns: class %d is not implemented`, msg.Question.Class)
 		return false
 	}
 
diff --git a/lib/dns/server_options.go b/lib/dns/server_options.go
index 9c042b5a..d53b1abd 100644
--- a/lib/dns/server_options.go
+++ b/lib/dns/server_options.go
@@ -14,21 +14,15 @@ import (
 	libnet "git.sr.ht/~shulhan/pakakeh.go/lib/net"
 )
 
-// List of [ServerOptions] Debug mode.
-// For example, to log DNS error and cache operations, set the Debug value
-// to 3 or (DebugLevelDNS|DebugLevelCache).
+// List of [ServerOptions.Debug] mode.
 const (
-	// Log error on DNS level, in example EMPTY answer, ERR_NAME,
-	// ERR_NOT_IMPLEMENTED, ERR_REFUSED.
-	DebugLevelDNS = 1
-
-	// Log cache operations, including new record, updating records,
-	// and pruning record in caches.
-	DebugLevelCache = 2
+	// Log cache operations, including insert, update, and deleting
+	// record into/from caches.
+	DebugLevelCache = 1
 
 	// Log low level DNS connection and packet, including request and
 	// response.
-	DebugLevelConnPacket = 4
+	DebugLevelConnPacket = 2
 )
 
 // HookFunc define type function that will be triggered on specific event.
@@ -109,7 +103,7 @@ type ServerOptions struct {
 	// accessed in the last 1 minute will be removed from cache.
 	PruneThreshold time.Duration `ini:"dns:server:cache.prune_threshold"`
 
-	// Debug level for server, accept value [DebugLevelDNS],
+	// Debug level for server, accept value
 	// [DebugLevelCache], [DebugLevelConnPacket], or any combination of
 	// it.
 	Debug int `ini:"dns:server:debug"`