#include <stdbool.h>
#include "udp_packet.h"
#include "etherlib/utils.h"

#define ETH_UDP_HEADER_SIZE (8)

int parse_udp(const uint8_t *hdr, uint32_t size, PcktProps * props) {
    UDPProps * udpProps = (UDPProps *)props;
    COPY_WORD_H2N_ADVANCE(&udpProps->SourcePort, hdr);
    COPY_WORD_H2N_ADVANCE(&udpProps->DestinationPort, hdr);
    COPY_WORD_H2N_ADVANCE(&udpProps->Length, hdr);
    COPY_WORD_H2N_ADVANCE(&udpProps->Checksum, hdr);

    // common fields...
    udpProps->headerSize = ETH_UDP_HEADER_SIZE;
    udpProps->validityOK = size == udpProps->Length; // TODO UDP checksum validation!
    udpProps->containedPacketClass = 0;

    return udpProps->validityOK ? 0 : -1;
}