Add crc32 validation of received frames

2016-02-14 21:13:16 +02:00
parent a3ec3bbef8
commit 62058329ff
2 changed files with 43 additions and 1 deletions
--- a/serial_link/protocol/frame_validator.c
+++ b/serial_link/protocol/frame_validator.c
@@ -23,6 +23,7 @@ SOFTWARE.
 */

 #include "protocol/frame_validator.h"
+#include "protocol/frame_router.h"

 const uint32_t poly8_lookup[256] =
 {
@@ -101,5 +102,11 @@ static uint32_t crc32_byte(uint8_t *p, uint32_t bytelength)
 }

 void recv_frame(uint8_t* data, uint16_t size) {
-
+    if (size > 4) {
+        uint32_t frame_crc = *(uint32_t*)(data + size - 4);
+        uint32_t expected_crc = crc32_byte(data, size - 4);
+        if (frame_crc == expected_crc) {
+            route_frame(data, size-4);
+        }
+    }
 }