From 5debf2cd3c35821a925435563611ae53999fd4be Mon Sep 17 00:00:00 2001
From: "Dolf Schimmel (Freeaqingme)" <dolf@dolfschimmel.nl>
Date: Sun, 27 Mar 2016 19:06:36 +0200
Subject: [PATCH] Error on invalid proxyprotocol prefix

---
 protocol.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/protocol.go b/protocol.go
index 2fc1dfc..9e21e31 100644
--- a/protocol.go
+++ b/protocol.go
@@ -134,7 +134,7 @@ func (p *Conn) checkPrefix() error {
 
 		// Check for a prefix mis-match, quit early
 		if !bytes.Equal(inp, prefix[:i]) {
-			return nil
+			return fmt.Errorf("Invalid Proxy Protocol Header")
 		}
 	}