ladybird/Kernel/Net/ICMP.h

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/MACAddress.h>
#include <Kernel/Net/IPv4.h>
struct ICMPType {
enum {
EchoReply = 0,
EchoRequest = 8,
};
};
class [[gnu::packed]] ICMPHeader {
public:
ICMPHeader() = default;
~ICMPHeader() = default;
u8 type() const { return m_type; }
void set_type(u8 b) { m_type = b; }
u8 code() const { return m_code; }
void set_code(u8 b) { m_code = b; }
u16 checksum() const { return m_checksum; }
void set_checksum(u16 w) { m_checksum = w; }
const void* payload() const { return this + 1; }
void* payload() { return this + 1; }
private:
u8 m_type { 0 };
u8 m_code { 0 };
NetworkOrdered<u16> m_checksum { 0 };
// NOTE: The rest of the header is 4 bytes
};
static_assert(sizeof(ICMPHeader) == 4);
struct [[gnu::packed]] ICMPEchoPacket {
ICMPHeader header;
NetworkOrdered<u16> identifier;
NetworkOrdered<u16> sequence_number;
void* payload() { return this + 1; }
const void* payload() const { return this + 1; }
};