udp_header.hxx

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#pragma once
 
#include <cstdint>
 
#include "utils.hxx"
 
namespace vbvx {

struct [[gnu::packed]] UDPHeader {
  uint16_t src_port_be;
  uint16_t dst_port_be;
  uint16_t length_be;
  uint16_t checksum_be;
 
  constexpr auto src_port() const noexcept -> uint16_t {
    return autoswap(src_port_be);
  }
 
  constexpr auto dst_port() const noexcept -> uint16_t {
    return autoswap(dst_port_be);
  }
 
  constexpr auto length() const noexcept -> uint16_t {
    return autoswap(length_be);
  }
 
  constexpr auto checksum() const noexcept -> uint16_t {
    return autoswap(checksum_be);
  }
 
  constexpr void set_src_port(uint16_t v) noexcept {
    src_port_be = autoswap(v);
  }
 
  constexpr void set_dst_port(uint16_t v) noexcept {
    dst_port_be = autoswap(v);
  }
 
  constexpr void set_length(uint16_t v) noexcept { length_be = autoswap(v); }
 
  constexpr void set_checksum(uint16_t v) noexcept {
    checksum_be = autoswap(v);
  }
};
 
static_assert(sizeof(UDPHeader) == 8, "Wrong UDP header size");
static_assert(alignof(UDPHeader) == 1, "Wrong UDP header alignment");
 
} // namespace vbvx