From b0fed73236f74bbaf031437aedead5dde824f18b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?YuSaki=E4=B8=B6Kanade?=
 <53483352+Nep-Timeline@users.noreply.github.com>
Date: Tue, 1 Aug 2023 17:30:57 +0800
Subject: [PATCH] Fix: mapping dns should not stale (#675)

* Fix: mapping dns should not stale

* Update enhancer.go
---
 dns/enhancer.go   | 2 +-
 dns/middleware.go | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/dns/enhancer.go b/dns/enhancer.go
index 76d4460e29..ab144fd32e 100644
--- a/dns/enhancer.go
+++ b/dns/enhancer.go
@@ -109,7 +109,7 @@ func NewEnhancer(cfg Config) *ResolverEnhancer {
 
 	if cfg.EnhancedMode != C.DNSNormal {
 		fakePool = cfg.Pool
-		mapping = cache.New(cache.WithSize[netip.Addr, string](4096), cache.WithStale[netip.Addr, string](true))
+		mapping = cache.New(cache.WithSize[netip.Addr, string](4096))
 	}
 
 	return &ResolverEnhancer{
diff --git a/dns/middleware.go b/dns/middleware.go
index f2dd9c96f1..695432da40 100644
--- a/dns/middleware.go
+++ b/dns/middleware.go
@@ -129,6 +129,10 @@ func withMapping(mapping *cache.LruCache[netip.Addr, string]) middleware {
 					continue
 				}
 
+				if ttl < 1 {
+					ttl = 1
+				}
+
 				mapping.SetWithExpire(ip, host, time.Now().Add(time.Second*time.Duration(ttl)))
 			}