#ifndef ICMP_UTILS_H
#define ICMP_UTILS_H

#include <stdint.h>
#include <stddef.h>
#include <time.h>

/* Checksum calculation (RFC 1071) */
uint16_t icmp_checksum(const void *data, size_t len);

/* Time helpers - return 0 on success, -1 on error */
int icmp_get_time(struct timespec *ts);
int64_t icmp_time_diff_ns(const struct timespec *start,
                          const struct timespec *end);

#endif