/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

#include <bits/stdint.h>
#include <sys/cdefs.h>

__BEGIN_DECLS

struct icmphdr {
    uint8_t type;
    uint8_t code;
    uint16_t checksum;
    union {
        struct {
            uint16_t id;
            uint16_t sequence;
        } echo;
        uint32_t gateway;
    } un;
};

#define ICMP_ECHOREPLY 0       // Echo Reply
#define ICMP_DEST_UNREACH 3    // Destination Unreachable
#define ICMP_SOURCE_QUENCH 4   // Source Quench
#define ICMP_REDIRECT 5        // Redirect
#define ICMP_ECHO 8            // Echo Request
#define ICMP_TIME_EXCEEDED 11  // Time Exceeded
#define ICMP_PARAMETERPROB 12  // Parameter Problem
#define ICMP_TIMESTAMP 13      // Timestamp Request
#define ICMP_TIMESTAMPREPLY 14 // Timestamp Reply
#define ICMP_INFO_REQUEST 15   // Information Request
#define ICMP_INFO_REPLY 16     // Information Reply
#define ICMP_ADDRESS 17        // Address Mask Request
#define ICMP_ADDRESSREPLY 18   // Address Mask Reply
#define NR_ICMP_TYPES 18

__END_DECLS