/*      $NetBSD: ip6.c,v 1.16 2014/06/03 22:22:41 joerg 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: ip6.c,v 1.16 2014/06/03 22:22:41 joerg Exp $");
#endif /* not lint */

#include <sys/param.h>
#include <sys/sysctl.h>

#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_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 SHOW(stat, row, col) \
    mvwprintw(wnd, row, col, "%9llu", (unsigned long long)curstat[stat])

enum update {
        UPDATE_TIME,
        UPDATE_BOOT,
        UPDATE_RUN,
};

static enum update update = UPDATE_TIME;
static uint64_t curstat[IP6_NSTATS];
static uint64_t newstat[IP6_NSTATS];
static uint64_t oldstat[IP6_NSTATS];

WINDOW *
openip6(void)
{

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

void
closeip6(WINDOW *w)
{

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

void
labelip6(void)
{

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

        LHD(0,  "total packet received");
        LHD(1,  "  smaller than minimum");
        LHD(2,  "  data size < data length");
        LHD(3,  "  bad options");
        LHD(4,  "  incorrect version no");
        LHD(5,  "  headers not continuous");
        LHD(6,  "  packet for this host");
        LHD(7,  "  multicast we don't join");
        LHD(8,  "  too many headers");
        LHD(9,  "  tunneled packet w/o gif");

        LHD(11, "  fragment received");
        LHD(12, "  fragment dropped");
        LHD(13, "  fragment timeout");
        LHD(14, "  fragment exceeded limit");
        LHD(15, "  packet reassembled ok");

#if 0
        LHD(17, "one mbuf");
        LHD(18, "one ext mbuf");
        LHD(19, "two or more ext mbuf");
        LHD(20, "two or more mbuf");
#endif

        RHD(0,  "packet forwarded");
        RHD(1,  "  packet not forwardable");
        RHD(2,  "  redirect sent");

        RHD(4,  "packet sent from this host");
        RHD(5,  "  fabricated ip header");
        RHD(6,  "  dropped output (no bufs)");
        RHD(7,  "  dropped output (no route)");
        RHD(8,  "  output datagram fragmented");
        RHD(9,  "  fragment created");
        RHD(10, "  can't be fragmented");

        RHD(12, "violated scope rules");
}
        
void
showip6(void)
{
#if 0
        u_quad_t m2m;
        int i;

        m2m = 0;
        for (i = 0; i < 32; i++) {
                m2m += curstat[IP6_STAT_M2M + i];
        }
#endif

        SHOW(IP6_STAT_TOTAL, 0, 0);
        SHOW(IP6_STAT_TOOSMALL, 1, 0);
        SHOW(IP6_STAT_TOOSHORT, 2, 0);
        SHOW(IP6_STAT_BADOPTIONS, 3, 0);
        SHOW(IP6_STAT_BADVERS, 4, 0);
        SHOW(IP6_STAT_EXTHDRTOOLONG, 5, 0);
        SHOW(IP6_STAT_DELIVERED, 6, 0);
        SHOW(IP6_STAT_NOTMEMBER, 7, 0);
        SHOW(IP6_STAT_TOOMANYHDR, 8, 0);
        SHOW(IP6_STAT_NOGIF, 9, 0);

        SHOW(IP6_STAT_FRAGMENTS, 11, 0);
        SHOW(IP6_STAT_FRAGDROPPED, 12, 0);
        SHOW(IP6_STAT_FRAGTIMEOUT, 13, 0);
        SHOW(IP6_STAT_FRAGOVERFLOW, 14, 0);
        SHOW(IP6_STAT_REASSEMBLED, 15, 0);

#if 0
        SHOW(IP6_STAT_M1, 17, 0);
        SHOW(IP6_STAT_MEXT1, 18, 0);
        SHOW(IP6_STAT_MEXT2M, 19, 0);
        mvwprintw(wnd, 20, 0, "%9llu", (unsigned long long)m2m);
#endif

        SHOW(IP6_STAT_FORWARD, 0, 35);
        SHOW(IP6_STAT_CANTFORWARD, 1, 35);
        SHOW(IP6_STAT_REDIRECTSENT, 2, 35);

        SHOW(IP6_STAT_LOCALOUT, 4, 35);
        SHOW(IP6_STAT_RAWOUT, 5, 35);
        SHOW(IP6_STAT_ODROPPED, 6, 35);
        SHOW(IP6_STAT_NOROUTE, 7, 35);
        SHOW(IP6_STAT_FRAGMENTED, 8, 35);
        SHOW(IP6_STAT_OFRAGMENTS, 9, 35);
        SHOW(IP6_STAT_CANTFRAG, 10, 35);

        SHOW(IP6_STAT_BADSCOPE, 12, 35);
}

int
initip6(void)
{

        return 1;
}

void
fetchip6(void)
{
        size_t i, size = sizeof(newstat);

        if (sysctlbyname("net.inet6.ip6.stats", newstat, &size, NULL, 0) == -1)
                return;

        for (i = 0; i < IP6_NSTATS; i++)
                xADJINETCTR(curstat, oldstat, newstat, i);

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

void
ip6_boot(char *args)
{

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

void
ip6_run(char *args)
{

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

void
ip6_time(char *args)
{

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

void
ip6_zero(char *args)
{

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