From ac131923a2eb3b249477761b3d85e103cff51b4d Mon Sep 17 00:00:00 2001
From: Aleksey Dmitrevskiy <ad@adguard.com>
Date: Wed, 6 Mar 2019 18:36:31 +0300
Subject: [PATCH] [change] control: add upstreams validation before dns config
 test

---
 control.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/control.go b/control.go
index d6e5cbe0..4ca0f023 100644
--- a/control.go
+++ b/control.go
@@ -418,6 +418,10 @@ func handleTestUpstreamDNS(w http.ResponseWriter, r *http.Request) {
 }
 
 func checkDNS(input string, bootstrap []string) error {
+	if err := validateUpstream(input); err != nil {
+		return fmt.Errorf("wrong upstream format: %s", err)
+	}
+
 	if len(bootstrap) == 0 {
 		bootstrap = defaultBootstrap
 	}