From c283d7a108ee06ae1e8694c86987175aaa9bdd06 Mon Sep 17 00:00:00 2001
From: Niklas <niklas@kapelle.org>
Date: Wed, 23 Dec 2020 13:10:58 +0100
Subject: [PATCH] added error check on parse ip

---
 coolDns.go | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/coolDns.go b/coolDns.go
index 3bfb0da..09f281e 100644
--- a/coolDns.go
+++ b/coolDns.go
@@ -137,8 +137,16 @@ func createServer(zones []zone, config config, aclList map[string]*net.IPNet) *d
 	for _, z := range zones {
 		srv.HandleFunc(z.zone, func(w dns.ResponseWriter, r *dns.Msg) {
 
-			remoteIP, _, _ := net.SplitHostPort(w.RemoteAddr().String())
+			// Parse IP
+			remoteIP, _, err := net.SplitHostPort(w.RemoteAddr().String())
+			if err != nil {
+				log.Printf("Faild to parse remote IP WTF? :%s", err.Error())
+				return
+			}
+
 			ip := net.ParseIP(remoteIP)
+
+			// Check ACL rules
 			if len(z.acl) != 0 {
 				passed := false
 				for _, rule := range z.acl {