From bcf2eb0e69e3708ef8859e2f2fb9f028d30861b2 Mon Sep 17 00:00:00 2001
From: Luc <luc.lebosse@gmail.com>
Date: Sat, 25 Jul 2015 20:25:07 +0800
Subject: [PATCH] Add check to avoid buffer overflow on progmem2char

transfer is limited to 300 char string, if over, string is ignored
---
 esp8266/webinterface.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/esp8266/webinterface.cpp b/esp8266/webinterface.cpp
index 1ee80f13..88758a6b 100644
--- a/esp8266/webinterface.cpp
+++ b/esp8266/webinterface.cpp
@@ -332,7 +332,8 @@ const char POLLING_ID[]PROGMEM ="POLLING";
 char * progmem2char(const char* src)
 {
   static char buffer[300];
-  strcpy_P(buffer,src);
+  buffer[0]=0;
+  if(strlen_P(src)<299)strcpy_P(buffer,src);
   return buffer;
 }