#pragma once

#include "icmp.h"


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

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

// Only actual IPv4 addresses allowed. Sends data in 'data' with length 'length'.
int icmp_client_send(
		int sock, uint32_t addr,
		int seqnum,
		const void *data, size_t length);

// Only actual IPv4 addresses allowed. Sends data in 'data' with length 'length', and
// returns pointer to internal buffer with reply data. Buffer is invalidated on next
// call to the function.
// Returns {.data=NULL} on error with errno.
struct icmp_incoming icmp_client_communicate(
		int sock, uint32_t addr,
		int seqnum,
		const void *data, size_t length);