#ifndef ICMP_INTERNAL_H
#define ICMP_INTERNAL_H

/* Internal handle structure */
struct icmp_handle {
	int fd;
	int last_error;
	char error_msg[256];
};

/* Error codes */
#define ICMP_OK				0
#define ICMP_ERR_PERMISSION	-1
#define ICMP_ERR_SOCKET		-2
#define ICMP_ERR_SEND		-3
#define ICMP_ERR_RECV		-4
#define ICMP_ERR_INVALID	-5
#define ICMP_ERR_ENOMEM		-6
#define ICMP_ERR_AGAIN		-7

/* Internal error handling functions */
void icmp_set_error(struct icmp_handle *h, int code, const char *msg);

#endif