jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#pragma once
8
9#include <AK/MACAddress.h>
10#include <Kernel/Net/IPv4.h>
11
12struct ICMPType {
13 enum {
14 EchoReply = 0,
15 EchoRequest = 8,
16 };
17};
18
19class [[gnu::packed]] ICMPHeader {
20public:
21 ICMPHeader() = default;
22 ~ICMPHeader() = default;
23
24 u8 type() const { return m_type; }
25 void set_type(u8 b) { m_type = b; }
26
27 u8 code() const { return m_code; }
28 void set_code(u8 b) { m_code = b; }
29
30 u16 checksum() const { return m_checksum; }
31 void set_checksum(u16 w) { m_checksum = w; }
32
33 void const* payload() const { return this + 1; }
34 void* payload() { return this + 1; }
35
36private:
37 u8 m_type { 0 };
38 u8 m_code { 0 };
39 NetworkOrdered<u16> m_checksum { 0 };
40 // NOTE: The rest of the header is 4 bytes
41};
42
43static_assert(AssertSize<ICMPHeader, 4>());
44
45struct [[gnu::packed]] ICMPEchoPacket {
46 ICMPHeader header;
47 NetworkOrdered<u16> identifier;
48 NetworkOrdered<u16> sequence_number;
49 void* payload() { return this + 1; }
50 void const* payload() const { return this + 1; }
51};