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Add crc32 validation of received frames

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This commit is contained in:
Fred Sundvik 2016-02-14 21:13:16 +02:00
parent a3ec3bbef8
commit 62058329ff
2 changed files with 43 additions and 1 deletions
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9
serial_link/protocol/frame_validator.c
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@ -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);
}
}
}