/*	$NetBSD: icmp.c,v 1.9 2006/10/22 16:43:24 christos Exp $	*/

/*
 * Copyright (c) 1999, 2000 Andrew Doran <ad@NetBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: icmp.c,v 1.9 2006/10/22 16:43:24 christos Exp $");
#endif /* not lint */

#include <sys/param.h>

#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netinet/icmp_var.h>

#include <string.h>

#include "systat.h"
#include "extern.h"

#define LHD(row, str) mvwprintw(wnd, row, 10, str)
#define RHD(row, str) mvwprintw(wnd, row, 45, str);
#define BD(row, str) LHD(row, str); RHD(row, str)
#define SHOW(stat, row, col) \
    mvwprintw(wnd, row, col, "%9llu", (unsigned long long)curstat.stat)
#define SHOW2(type, row) SHOW(icps_inhist[type], row, 0); \
    SHOW(icps_outhist[type], row, 35)

enum update {
	UPDATE_TIME,
	UPDATE_BOOT,
	UPDATE_RUN,
};

static enum update update = UPDATE_TIME;
static struct icmpstat curstat;
static struct icmpstat newstat;
static struct icmpstat oldstat;

static struct nlist namelist[] = {
	{ .n_name = "_icmpstat" },
	{ .n_name = NULL }
};

WINDOW *
openicmp(void)
{

	return (subwin(stdscr, -1, 0, 5, 0));
}

void
closeicmp(WINDOW *w)
{

	if (w != NULL) {
		wclear(w);
		wrefresh(w);
		delwin(w);
	}
}

void
labelicmp(void)
{

	wmove(wnd, 0, 0); wclrtoeol(wnd);

	mvwprintw(wnd, 1, 0,  "------------ ICMP input -----------");
	mvwprintw(wnd, 1, 36, "------------- ICMP output ---------------");

	mvwprintw(wnd, 8, 0,  "---------- Input histogram --------");
	mvwprintw(wnd, 8, 36, "---------- Output histogram -------------");
	
	LHD(3, "with bad code");
	LHD(4, "with bad length");
	LHD(5, "with bad checksum");
	LHD(6, "with insufficient data");
	
	RHD(3, "errors generated");
	RHD(4, "suppressed - original too short");
	RHD(5, "suppressed - original was ICMP");
	RHD(6, "responses sent");

	BD(2, "total messages");
	BD(9, "echo response");
	BD(10, "echo request");
	BD(11, "destination unreachable");
	BD(12, "redirect");
	BD(13, "time-to-live exceeded");
	BD(14, "parameter problem");
	LHD(15, "router advertisement");	
	RHD(15, "router solicitation");
}

void
showicmp(void)
{
	u_long tin, tout;
	int i;

	for (i = tin = tout = 0; i <= ICMP_MAXTYPE; i++) {
		tin += curstat.icps_inhist[i];
		tout += curstat.icps_outhist[i];
	}

	tin += curstat.icps_badcode + curstat.icps_badlen + 
	    curstat.icps_checksum + curstat.icps_tooshort;
	mvwprintw(wnd, 2, 0, "%9lu", tin);
	mvwprintw(wnd, 2, 35, "%9lu", tout);

	SHOW(icps_badcode, 3, 0);
	SHOW(icps_badlen, 4, 0);
	SHOW(icps_checksum, 5, 0);
	SHOW(icps_tooshort, 6, 0);
	SHOW(icps_error, 3, 35);
	SHOW(icps_oldshort, 4, 35);
	SHOW(icps_oldicmp, 5, 35);
	SHOW(icps_reflect, 6, 35);

	SHOW2(ICMP_ECHOREPLY, 9);
	SHOW2(ICMP_ECHO, 10);
	SHOW2(ICMP_UNREACH, 11);
	SHOW2(ICMP_REDIRECT, 12);
	SHOW2(ICMP_TIMXCEED, 13);
	SHOW2(ICMP_PARAMPROB, 14);
	SHOW(icps_inhist[ICMP_ROUTERADVERT], 15, 0);
	SHOW(icps_outhist[ICMP_ROUTERSOLICIT], 15, 35);
}

int
initicmp(void)
{

	if (namelist[0].n_type == 0) {
		if (kvm_nlist(kd, namelist)) {
			nlisterr(namelist);
			return(0);
		}
		if (namelist[0].n_type == 0) {
			error("No namelist");
			return(0);
		}
	}
	
	return (1);
}

void
fetchicmp(void)
{
	int i;

	KREAD((void *)namelist[0].n_value, &newstat, sizeof(newstat));

	ADJINETCTR(curstat, oldstat, newstat, icps_badcode);
	ADJINETCTR(curstat, oldstat, newstat, icps_badlen);
	ADJINETCTR(curstat, oldstat, newstat, icps_checksum);
	ADJINETCTR(curstat, oldstat, newstat, icps_tooshort);
	ADJINETCTR(curstat, oldstat, newstat, icps_error);
	ADJINETCTR(curstat, oldstat, newstat, icps_oldshort);
	ADJINETCTR(curstat, oldstat, newstat, icps_oldicmp);
	ADJINETCTR(curstat, oldstat, newstat, icps_reflect);

	for (i = 0; i <= ICMP_MAXTYPE; i++) {
		ADJINETCTR(curstat, oldstat, newstat, icps_inhist[i]);
		ADJINETCTR(curstat, oldstat, newstat, icps_outhist[i]);
	}

	if (update == UPDATE_TIME)
		memcpy(&oldstat, &newstat, sizeof(oldstat));
}

void
icmp_boot(char *args)
{

	memset(&oldstat, 0, sizeof(oldstat));
	update = UPDATE_BOOT;
}

void
icmp_run(char *args)
{

	if (update != UPDATE_RUN) {
		memcpy(&oldstat, &newstat, sizeof(oldstat));
		update = UPDATE_RUN;
	}
}

void
icmp_time(char *args)
{

	if (update != UPDATE_TIME) {
		memcpy(&oldstat, &newstat, sizeof(oldstat));
		update = UPDATE_TIME;
	}
}

void
icmp_zero(char *args)
{

	if (update == UPDATE_RUN)
		memcpy(&oldstat, &newstat, sizeof(oldstat));
}