/**
 * PING header
 *
 * Copyright (C) 2001 Jeffrey Fulmer <jdfulmer@armstrong.com>
 * This file is part of LIBPING
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */
#ifndef PING_H
#define PING_H

#include "includes.h"

#if defined( __linux__ )

#define ICMP_ECHOREPLY          0
#define ICMP_ECHO               8
#define ICMP_MINLEN             8

struct ip {
#if (BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == PDP_ENDIAN)
	u_char ip_hl:4,				/* header length */
	 ip_v:4;					/* version */
#else
	u_char ip_v:4,				/* version */
	 ip_hl:4;					/* header length */
#endif
	u_char ip_tos;				/* type of service */
	short ip_len;				/* total length */
	u_short ip_id;				/* identification */
	short ip_off;				/* fragment offset field */
#define IP_DF 0x4000			/* dont fragment flag */
#define IP_MF 0x2000			/* more fragments flag */
	u_char ip_ttl;				/* time to live */
	u_char ip_p;				/* protocol */
	u_short ip_sum;				/* checksum */
	struct in_addr ip_src, ip_dst;	/* source and dest address */
};

#define n_short u_short			/* normally defined in in_systm.h */
#define n_long  u_int			/* redefine for 64-bit machines */
#define n_time  u_int			/* redefine for 64-bit machines */

struct icmp {
	u_char icmp_type;			/* type of message, see below */
	u_char icmp_code;			/* type sub code */
	u_short icmp_cksum;			/* ones complement cksum of struct */
	union {
		u_char ih_pptr;			/* ICMP_PARAMPROB */
		struct in_addr ih_gwaddr;	/* ICMP_REDIRECT */
		struct ih_idseq {
			n_short icd_id;
			n_short icd_seq;
		} ih_idseq;
		int ih_void;
	} icmp_hun;
#define icmp_pptr       icmp_hun.ih_pptr
#define icmp_gwaddr     icmp_hun.ih_gwaddr
#define icmp_id         icmp_hun.ih_idseq.icd_id
#define icmp_seq        icmp_hun.ih_idseq.icd_seq
#define icmp_void       icmp_hun.ih_void
	union {
		struct id_ts {
			n_time its_otime;
			n_time its_rtime;
			n_time its_ttime;
		} id_ts;
		struct id_ip {
			struct ip idi_ip;
			/* options and then 64 bits of data */
		} id_ip;
		n_long id_mask;
		char id_data[1];
	} icmp_dun;
#define icmp_otime      icmp_dun.id_ts.its_otime
#define icmp_rtime      icmp_dun.id_ts.its_rtime
#define icmp_ttime      icmp_dun.id_ts.its_ttime
#define icmp_ip         icmp_dun.id_ip.idi_ip
#define icmp_mask       icmp_dun.id_mask
#define icmp_data       icmp_dun.id_data
};

#else
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#endif							/* defined(__linux__) */

#define IDENT_DEFAULT 0
#define TIMO_DEFAULT 2

struct ping_priv {
	int ident;
	int timo;
	int rrt;
	int sock;
};

struct ping_priv ping_priv_default(void);

int pinghost(const char *hostname);
int pingthost(const char *hostname, int t);
int tpinghost(const char *hostname);
int tpingthost(const char *hostname, int t);

#endif							/*PING_H */