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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/MACAddress.h>
#include <Kernel/Net/IPv4.h>
struct ICMPType {
enum {
EchoReply = 0,
EchoRequest = 8,
};
};
class [[gnu::packed]] ICMPHeader
{
public:
ICMPHeader() {}
~ICMPHeader() {}
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; }
};
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