remove nil check

component/fakedns/middleware.go

@@ -11,7 +11,7 @@ import (
 )
 
 var (
-	BackendDNS = []string{}
+	BackendDNS []string
 )
 
 func dnsExchange(r *D.Msg) (msg *D.Msg) {

proxy/proxy.go

@@ -43,9 +43,6 @@ func RegisterFakeDNS(d D.FakeDNS, h string) {
 
 // Check target if is hijacked address.
 func isHijacked(target *net.UDPAddr) bool {
-	if hijackDNS == nil || len(hijackDNS) == 0 {
-		return false
-	}
 	for _, addr := range hijackDNS {
 		host, port, err := net.SplitHostPort(addr)
 		if err != nil {