From fb58749c58e07d819743e8cb1a31dce56423d91a Mon Sep 17 00:00:00 2001
From: bloved <bloved@fedibox.com>
Date: Sun, 24 Jan 2021 10:51:01 +0100
Subject: [PATCH] - network down is ignored if the selected configuration is
 local responder

---
 01.conf.go     | 7 +++++--
 dns_client.go  | 3 ++-
 dns_handler.go | 4 ++--
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/01.conf.go b/01.conf.go
index c0d788e..e3060d2 100644
--- a/01.conf.go
+++ b/01.conf.go
@@ -13,10 +13,13 @@ import (
 	"github.com/miekg/dns"
 )
 
+var localresponderConfigName string
+
 type stringarray []string
 type urlsMap map[string]stringarray
 
 func init() {
+	localresponderConfigName = "__localresponder__"
 	var MyConfRaw interface{}
 
 	file, err := ioutil.ReadFile("config.json")
@@ -248,7 +251,7 @@ func init() {
 	}
 
 	//************************
-	// Local responser section
+	// Local responder section
 	//************************
 	if MyConf["localresponder"] != nil {
 		localresponder := MyConf["localresponder"].(map[string]interface{})
@@ -258,7 +261,7 @@ func init() {
 				ZabovLocalResponder = localresponder["responder"].(string)
 				if len(ZabovLocalResponder) > 0 {
 					local := ZabovConfig{ZabovDNSArray: []string{ZabovLocalResponder}, references: 1}
-					ZabovConfigs["__localresponder__"] = &local
+					ZabovConfigs[localresponderConfigName] = &local
 					fmt.Println("ZabovLocalResponder:", ZabovLocalResponder)
 				}
 			}
diff --git a/dns_client.go b/dns_client.go
index a6c7849..a9707f4 100644
--- a/dns_client.go
+++ b/dns_client.go
@@ -42,7 +42,8 @@ func ForwardQuery(query *dns.Msg, config string, nocache bool) *dns.Msg {
 	for {
 		// round robin with retry
 
-		if !NetworkUp {
+		// local responder should always be available also if no internet connection
+		if !NetworkUp && localresponderConfigName != config {
 			time.Sleep(10 * time.Second)
 			go incrementStats("Network Problems ", 1)
 			continue
diff --git a/dns_handler.go b/dns_handler.go
index 12c6801..c7e0353 100644
--- a/dns_handler.go
+++ b/dns_handler.go
@@ -269,7 +269,7 @@ func (mydns *handler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 		if len(ZabovLocalResponder) > 0 {
 			if !strings.Contains(fqdn, ".") ||
 				(len(ZabovLocalDomain) > 0 && strings.HasSuffix(fqdn, ZabovLocalDomain)) {
-				config = "__localresponder__"
+				config = localresponderConfigName
 				ret := ForwardQuery(r, config, true)
 				w.WriteMsg(ret)
 				go logQuery(remIP, fqdn, QType, config, timetable, "localresponder")
@@ -297,7 +297,7 @@ func (mydns *handler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 
 		if len(ZabovLocalResponder) > 0 {
 			// if set use local responder for reverse lookup (suffix ".in-addr.arpa.")
-			config = "__localresponder__"
+			config = localresponderConfigName
 		}
 		ret := ForwardQuery(r, config, true)
 		w.WriteMsg(ret)