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#pragma once
#include <stdint.h>
#define IP_HEADER_SIZE 40
#define MIN_MTU 576
#define MAX_IP_PACKET_SIZE 65535
#define MAX_DATAGRAM_SIZE (MAX_IP_PACKET_SIZE - IP_HEADER_SIZE)
#define ICMP_PAYLOAD_OFFSET 8
struct __attribute__((packed)) icmp_echo {
uint8_t type;
uint8_t code;
uint16_t checksum;
uint16_t id;
uint16_t seqnum;
uint8_t payload[MAX_DATAGRAM_SIZE - ICMP_PAYLOAD_OFFSET];
};
#define ICMP_MAX_PAYLOAD_LENGTH (MAX_DATAGRAM_SIZE - ICMP_PAYLOAD_OFFSET)
#define ICMP_SAFE_PAYLOAD_LENGTH (MIN_MTU - IP_HEADER_SIZE - ICMP_PAYLOAD_OFFSET)
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