Fix and improve TTL handling

2020-07-20 16:40:47 +02:00
parent 813346e829
commit 8dea8e6c46
4 changed files with 15 additions and 6 deletions
--- a/resolver/rrcache.go
+++ b/resolver/rrcache.go
@@ -72,9 +72,12 @@ func (rrCache *RRCache) Clean(minExpires uint32) {
 		header.Ttl = 17
 	}

-	// TTL must be at least minExpires
-	if lowestTTL < minExpires {
+	// TTL range limits
+	switch {
+	case lowestTTL < minExpires:
 		lowestTTL = minExpires
+	case lowestTTL > maxTTL:
+		lowestTTL = maxTTL
 	}

 	// shorten caching