#pragma once

#include "icmp.h"


// Returns -1 on error with errno.
int icmp_server_open_socket(void);

// Returns {.data=NULL} on error with errno.
// Receives only ECHO.
struct icmp_incoming icmp_server_receive(int sock);

// Returns -1 on error with errno.
int icmp_server_send_reply(
		int sock, uint32_t addr,
		int id, int seqnum,
		const void *data, size_t length);