#pragma once

#include <stdint.h>

#include "ipv4.h"

namespace udp4 {
  struct header {
    uint16_t source_port;
    uint16_t destination_port;
    uint16_t length;
    uint16_t checksum;
  };

  static_assert((sizeof (header)) == 8);

  struct ipv4_psuedo_header {
    uint32_t source_address;
    uint32_t destination_address;
    uint8_t zeros;
    uint8_t protocol;
    uint16_t udp_length;
  };

  header * make_header(void * buf,
                       uint32_t source_port,
                       uint32_t destination_port,
                       uint32_t source_address,
                       uint32_t destination_address,
                       void const * payload,
                       int payload_length);
}