From 6edf4113a44298928bb570a111b1a1bc16d64d5e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A1szl=C3=B3=20Monda?= <laci@monda.hu>
Date: Sun, 1 Oct 2017 22:05:20 +0200
Subject: [PATCH] Make the slave check message integrity and only process if
 it's valid.

---
 left/src/slave_protocol_handler.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/left/src/slave_protocol_handler.c b/left/src/slave_protocol_handler.c
index b3afc24..fabb74a 100644
--- a/left/src/slave_protocol_handler.c
+++ b/left/src/slave_protocol_handler.c
@@ -35,6 +35,11 @@ void SetResponseByte(uint8_t response)
 
 void SlaveRxHandler(void)
 {
+    if (!CRC16_IsMessageValid(&RxMessage)) {
+        TxMessage.length = 0;
+        return;
+    }
+
     uint8_t commandId = RxMessage.data[0];
     switch (commandId) {
         case SlaveCommand_SetTestLed: