#include "message.h"
#include "crc.h"

enum MESSAGEERR
message_validate(const union Message* message) {

    uint16_t length = message->header.length & 0x1FFF & ~0x400;

    if(message->header.crc != crc8(message, 3))
        return MESSAGEERR_HEADERCRC;

    struct Footer* footer = (void*)message + length - sizeof(struct Footer);
    if(footer->crc != crc16(message, length - sizeof(struct Footer)))
        return MESSAGEERR_FOOTERCRC;

    return MESSAGEERR_NONE;
}