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#pragma once
#include <cstdint>
#include <optional>
#include <span>
#include "wireframe/byteio.hpp"
namespace wireframe::net {
inline constexpr std::size_t kUdpHeaderLen = 8;
struct UdpHeader {
std::uint16_t src_port;
std::uint16_t dst_port;
std::uint16_t length;
};
struct UdpDatagram {
UdpHeader header;
std::span<const unsigned char> payload;
};
inline std::optional<UdpDatagram> parse_udp(std::span<const unsigned char> bytes) {
if (bytes.size() < kUdpHeaderLen) return std::nullopt;
UdpHeader header{};
header.src_port = read_be16(bytes, 0);
header.dst_port = read_be16(bytes, 2);
header.length = read_be16(bytes, 4);
return UdpDatagram{header, bytes.subspan(kUdpHeaderLen)};
}
} // namespace wireframe::net
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