#ifndef ICMP_PACKET_INTERNAL_H
#define ICMP_PACKET_INTERNAL_H

#include <stdint.h>
#include <stddef.h>
#include <netinet/in.h>

int icmp_build_packet(void *buffer, size_t buffer_len, uint8_t type,
						uint8_t code, uint32_t header_rest,
						const void *payload, size_t payload_len);

int icmp_parse_ip_header(const void *buffer, size_t buffer_len,
						uint8_t *ttl, struct in_addr *src_addr,
						size_t *ip_hdr_len, struct in_addr *dst_addr,
						uint8_t *protocol);

int icmp_parse_icmp_payload(const void *buffer, size_t buffer_len,
							size_t ip_hdr_len, uint8_t *type, uint8_t *code,
							const void **payload, size_t *payload_len);

#endif