From 0d4479a72ab615bafcbf61a22fd87c30851a0fab Mon Sep 17 00:00:00 2001
From: Loyalsoldier <10487845+Loyalsoldier@users.noreply.github.com>
Date: Sat, 1 May 2021 21:44:12 +0800
Subject: [PATCH] Fix: FakeDNS prints error with empty config (#955)

---
 app/dns/fakedns/fake.go | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/app/dns/fakedns/fake.go b/app/dns/fakedns/fake.go
index 8aa6624a2..e74ec76bd 100644
--- a/app/dns/fakedns/fake.go
+++ b/app/dns/fakedns/fake.go
@@ -43,7 +43,10 @@ func (*Holder) Type() interface{} {
 }
 
 func (fkdns *Holder) Start() error {
-	return fkdns.initializeFromConfig()
+	if fkdns.config != nil && fkdns.config.IpPool != "" && fkdns.config.LruSize != 0 {
+		return fkdns.initializeFromConfig()
+	}
+	return nil
 }
 
 func (fkdns *Holder) Close() error {
@@ -184,9 +187,10 @@ func (h *HolderMulti) Type() interface{} {
 
 func (h *HolderMulti) Start() error {
 	for _, v := range h.holders {
-		err := v.Start()
-		if err != nil {
-			return newError("Cannot start all fake dns pools").Base(err)
+		if v.config != nil && v.config.IpPool != "" && v.config.LruSize != 0 {
+			if err := v.Start(); err != nil {
+				return newError("Cannot start all fake dns pools").Base(err)
+			}
 		}
 	}
 	return nil