/*      $NetBSD: inet6.c,v 1.84 2022/10/28 05:27:17 ozaki-r Exp $       */
/*      BSDI inet.c,v 2.3 1995/10/24 02:19:29 prb Exp   */

/*
 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
 * 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.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
 */

/*
 * Copyright (c) 1983, 1988, 1993
 *      The Regents of the University of California.  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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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
#if 0
static char sccsid[] = "@(#)inet.c      8.4 (Berkeley) 4/20/94";
#else
__RCSID("$NetBSD: inet6.c,v 1.84 2022/10/28 05:27:17 ozaki-r Exp $");
#endif
#endif /* not lint */

#define _CALLOUT_PRIVATE

#include <sys/param.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/ioctl.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/sysctl.h>

#include <net/route.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
#include <netinet/icmp6.h>
#include <netinet/in_systm.h>
#ifndef TCP6
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#endif
#include <netinet6/ip6_var.h>
#include <netinet6/in6_pcb.h>
#include <netinet6/in6_var.h>
#ifdef TCP6
#include <netinet/tcp6.h>
#include <netinet/tcp6_seq.h>
#define TCP6STATES
#include <netinet/tcp6_fsm.h>
#define TCP6TIMERS
#include <netinet/tcp6_timer.h>
#include <netinet/tcp6_var.h>
#include <netinet/tcp6_debug.h>
#else
#define TCP6T_NTIMERS   TCPT_NTIMERS
#define tcp6timers tcptimers
#define tcp6states tcpstates
#define TCP6_NSTATES    TCP_NSTATES
#define tcp6cb tcpcb
#include <netinet/tcp.h>
#include <netinet/tcp_seq.h>
#include <netinet/tcp_fsm.h>
extern const char * const tcpstates[];
extern const char * const tcptimers[];
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/tcp_debug.h>
#endif /*TCP6*/
#include <netinet6/udp6.h>
#include <netinet6/udp6_var.h>
#include <netinet6/pim6_var.h>
#include <netinet6/raw_ip6.h>
#include <netinet/tcp_vtw.h>

#include <arpa/inet.h>
#if 0
#include "gethostbyname2.h"
#endif
#include <netdb.h>

#include <err.h>
#include <errno.h>
#include <kvm.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include "netstat.h"
#include "vtw.h"
#include "prog_ops.h"

#ifdef INET6

struct  in6pcb in6pcb;
#ifdef TCP6
struct  tcp6cb tcp6cb;
#else
struct  tcpcb tcpcb;
#endif

char    *inet6name(const struct in6_addr *);
void    inet6print(const struct in6_addr *, int, const char *);
void    print_vtw_v6(const vtw_t *);

/*
 * Print a summary of connections related to an Internet
 * protocol.  For TCP, also give state of connection.
 * Listening processes (aflag) are suppressed unless the
 * -a (all) flag is specified.
 */
static int width;
static int compact;

/* VTW-related variables. */
static struct timeval now;

static void
ip6protoprhdr(void)
{

        printf("Active Internet6 connections");

        if (aflag)
                printf(" (including servers)");
        putchar('\n');

        if (Aflag) {
                printf("%-8.8s ", "PCB");
                width = 18;
        }
        printf(
            Vflag ? "%-5.5s %-6.6s %-6.6s  %*.*s %*.*s %-13.13s Expires\n"
                  : "%-5.5s %-6.6s %-6.6s  %*.*s %*.*s %s\n",
            "Proto", "Recv-Q", "Send-Q",
            -width, width, "Local Address",
            -width, width, "Foreign Address", "(state)");
}

static void
ip6protopr0(intptr_t ppcb, u_long rcv_sb_cc, u_long snd_sb_cc,
        const struct in6_addr *laddr, uint16_t lport,
        const struct in6_addr *faddr, uint16_t fport,
        short t_state, const char *name, const struct timeval *expires)
{
        static const char *shorttcpstates[] = {
                "CLOSED",       "LISTEN",       "SYNSEN",       "SYSRCV",
                "ESTABL",       "CLWAIT",       "FWAIT1",       "CLOSNG",
                "LASTAK",       "FWAIT2",       "TMWAIT"
        };
        int istcp;

        istcp = strcmp(name, "tcp6") == 0;
        if (Aflag)
                printf("%8" PRIxPTR " ", ppcb);

        printf("%-5.5s %6ld %6ld%s", name, rcv_sb_cc, snd_sb_cc,
            compact ? "" : " ");

        inet6print(laddr, (int)lport, name);
        inet6print(faddr, (int)fport, name);
        if (istcp) {
#ifdef TCP6
                if (t_state < 0 || t_state >= TCP6_NSTATES)
                        printf(" %d", t_state);
                else
                        printf(" %s", tcp6states[t_state]);
#else
                if (t_state < 0 || t_state >= TCP_NSTATES)
                        printf(" %d", t_state);
                else
                        printf(" %s", compact ? shorttcpstates[t_state] :
                            tcpstates[t_state]);
#endif
        }
        if (Vflag && expires != NULL) {
                if (expires->tv_sec == 0 && expires->tv_usec == -1)
                        printf(" reclaimed");
                else {
                        struct timeval delta;

                        timersub(expires, &now, &delta);
                        printf(" %.3fms",
                            delta.tv_sec * 1000.0 + delta.tv_usec / 1000.0);
                }
        }
        putchar('\n');
}

static void
dbg_printf(const char *fmt, ...)
{

        return;
}

void
print_vtw_v6(const vtw_t *vtw)
{
        const vtw_v6_t *v6 = (const vtw_v6_t *)vtw;
        struct timeval delta;
        char buf[2][128];
        static const struct timeval zero = {.tv_sec = 0, .tv_usec = 0};

        inet_ntop(AF_INET6, &v6->laddr, buf[0], sizeof(buf[0]));
        inet_ntop(AF_INET6, &v6->faddr, buf[1], sizeof(buf[1]));

        timersub(&vtw->expire, &now, &delta);

        if (vtw->expire.tv_sec == 0 && vtw->expire.tv_usec == -1) {
                dbg_printf("%15.15s:%d %15.15s:%d reclaimed\n",
                    buf[0], ntohs(v6->lport),
                    buf[1], ntohs(v6->fport));
                if (!(Vflag && vflag))
                        return;
        } else if (vtw->expire.tv_sec == 0)
                return;
        else if (timercmp(&delta, &zero, <) && !(Vflag && vflag)) {
                dbg_printf("%15.15s:%d %15.15s:%d expired\n",
                    buf[0], ntohs(v6->lport),
                    buf[1], ntohs(v6->fport));
                return;
        } else {
                dbg_printf("%15.15s:%d %15.15s:%d expires in %.3fms\n",
                    buf[0], ntohs(v6->lport),
                    buf[1], ntohs(v6->fport),
                    delta.tv_sec * 1000.0 + delta.tv_usec / 1000.0);
        }
        ip6protopr0(0, 0, 0,
                 &v6->laddr, v6->lport,
                 &v6->faddr, v6->fport,
                 TCPS_TIME_WAIT, "tcp6", &vtw->expire);
}


static struct kinfo_pcb *
getpcblist_kmem(u_long off, const char *name, size_t *len)
{
        struct socket sockb;
        struct inpcbtable table;
        struct inpcb *next, *prev;
        struct inpcb *inp;
        int istcp = strcmp(name, "tcp6") == 0;
        struct kinfo_pcb *pcblist;
        size_t size = 100, i;
        struct sockaddr_in6 sin6;
        struct inpcbqueue *head;

        if (off == 0) {
                *len = 0;
                return NULL;
        }
        kread(off, (char *)&table, sizeof (table));
        head = &table.inpt_queue;
        next = TAILQ_FIRST(head);
        prev = TAILQ_END(head);

        pcblist = NULL;
        if (reallocarr(&pcblist, size, sizeof(*pcblist)) != 0)
                err(1, "reallocarr");

        i = 0;
        while (next != TAILQ_END(head)) {
                kread((u_long)next, (char *)&in6pcb, sizeof in6pcb);
                inp = (struct inpcb *)&in6pcb;
                next = TAILQ_NEXT(inp, inp_queue);
                prev = next;

                if (inp->inp_af != AF_INET6)
                        continue;

                kread((u_long)inp->inp_socket, (char *)&sockb,
                    sizeof (sockb));
                if (istcp) {
#ifdef TCP6
                        kread((u_long)inp->inp_ppcb,
                            (char *)&tcp6cb, sizeof (tcp6cb));
#else
                        kread((u_long)inp->inp_ppcb,
                            (char *)&tcpcb, sizeof (tcpcb));
#endif
                }
                pcblist[i].ki_ppcbaddr =
                    istcp ? (uintptr_t) inp->inp_ppcb : (uintptr_t) prev;
                pcblist[i].ki_rcvq = (uint64_t)sockb.so_rcv.sb_cc;
                pcblist[i].ki_sndq = (uint64_t)sockb.so_snd.sb_cc;
                sin6.sin6_addr = in6p_laddr(inp);
                sin6.sin6_port = inp->inp_lport;
                memcpy(&pcblist[i].ki_s, &sin6, sizeof(sin6));
                sin6.sin6_addr = in6p_faddr(inp);
                sin6.sin6_port = inp->inp_fport;
                memcpy(&pcblist[i].ki_d, &sin6, sizeof(sin6));
                pcblist[i].ki_tstate = tcpcb.t_state;
                if (i++ == size) {
                        size += 100;
                        if (reallocarr(&pcblist, size, sizeof(*pcblist)) != 0)
                                err(1, "reallocarr");
                }
        }
        *len = i;
        return pcblist;
}

void
ip6protopr(u_long off, const char *name)
{
        struct kinfo_pcb *pcblist;
        size_t i, len;
        static int first = 1;

        compact = 0;
        if (Aflag) {
                if (!numeric_addr)
                        width = 18;
                else {
                        width = 21;
                        compact = 1;
                }
        } else
                width = 22;

        if (use_sysctl)
                pcblist = getpcblist_sysctl(name, &len);
        else
                pcblist = getpcblist_kmem(off, name, &len);

        for (i = 0; i < len; i++) {
                struct sockaddr_in6 src, dst;

                memcpy(&src, &pcblist[i].ki_s, sizeof(src));
                memcpy(&dst, &pcblist[i].ki_d, sizeof(dst));

                if (!aflag && IN6_IS_ADDR_UNSPECIFIED(&dst.sin6_addr))
                        continue;

                if (first) {
                        ip6protoprhdr();
                        first = 0;
                }

                ip6protopr0((intptr_t) pcblist[i].ki_ppcbaddr,
                    pcblist[i].ki_rcvq, pcblist[i].ki_sndq,
                    &src.sin6_addr, src.sin6_port,
                    &dst.sin6_addr, dst.sin6_port,
                    pcblist[i].ki_tstate, name, NULL);
        }

        free(pcblist);

        if (strcmp(name, "tcp6") == 0) {
                struct timeval t;
                timebase(&t);
                gettimeofday(&now, NULL);
                timersub(&now, &t, &now);
                show_vtw_v6(print_vtw_v6);
        }
}

#ifdef TCP6
/*
 * Dump TCP6 statistics structure.
 */
void
tcp6_stats(u_long off, const char *name)
{
        struct tcp6stat tcp6stat;

        if (use_sysctl) {
                size_t size = sizeof(tcp6stat);

                if (prog_sysctlbyname("net.inet6.tcp6.stats", &tcp6stat, &size,
                    NULL, 0) == -1 && errno != ENOMEM)
                        return;
        } else {
                warnx("%s stats not available via KVM.", name);
                return;
        }

        printf ("%s:\n", name);

#define p(f, m) if (tcp6stat.f || sflag <= 1)                   \
                printf(m, tcp6stat.f, plural(tcp6stat.f))
#define p2(f1, f2, m) if (tcp6stat.f1 || tcp6stat.f2 || sflag <= 1)      \
                printf(m, tcp6stat.f1, plural(tcp6stat.f1), tcp6stat.f2, \
                    plural(tcp6stat.f2))
#define p3(f, m) if (tcp6stat.f || sflag <= 1)                  \
                printf(m, tcp6stat.f, plurales(tcp6stat.f))

        p(tcp6s_sndtotal, "\t%ld packet%s sent\n");
        p2(tcp6s_sndpack,tcp6s_sndbyte,
            "\t\t%ld data packet%s (%ld byte%s)\n");
        p2(tcp6s_sndrexmitpack, tcp6s_sndrexmitbyte,
            "\t\t%ld data packet%s (%ld byte%s) retransmitted\n");
        p2(tcp6s_sndacks, tcp6s_delack,
            "\t\t%ld ack-only packet%s (%ld packet%s delayed)\n");
        p(tcp6s_sndurg, "\t\t%ld URG only packet%s\n");
        p(tcp6s_sndprobe, "\t\t%ld window probe packet%s\n");
        p(tcp6s_sndwinup, "\t\t%ld window update packet%s\n");
        p(tcp6s_sndctrl, "\t\t%ld control packet%s\n");
        p(tcp6s_rcvtotal, "\t%ld packet%s received\n");
        p2(tcp6s_rcvackpack, tcp6s_rcvackbyte,
            "\t\t%ld ack%s (for %ld byte%s)\n");
        p(tcp6s_rcvdupack, "\t\t%ld duplicate ack%s\n");
        p(tcp6s_rcvacktoomuch, "\t\t%ld ack%s for unsent data\n");
        p2(tcp6s_rcvpack, tcp6s_rcvbyte,
            "\t\t%ld packet%s (%ld byte%s) received in-sequence\n");
        p2(tcp6s_rcvduppack, tcp6s_rcvdupbyte,
            "\t\t%ld completely duplicate packet%s (%ld byte%s)\n");
        p(tcp6s_pawsdrop, "\t\t%ld old duplicate packet%s\n");
        p2(tcp6s_rcvpartduppack, tcp6s_rcvpartdupbyte,
            "\t\t%ld packet%s with some dup. data (%ld byte%s duped)\n");
        p2(tcp6s_rcvoopack, tcp6s_rcvoobyte,
            "\t\t%ld out-of-order packet%s (%ld byte%s)\n");
        p2(tcp6s_rcvpackafterwin, tcp6s_rcvbyteafterwin,
            "\t\t%ld packet%s (%ld byte%s) of data after window\n");
        p(tcp6s_rcvwinprobe, "\t\t%ld window probe%s\n");
        p(tcp6s_rcvwinupd, "\t\t%ld window update packet%s\n");
        p(tcp6s_rcvafterclose, "\t\t%ld packet%s received after close\n");
        p(tcp6s_rcvbadsum, "\t\t%ld discarded for bad checksum%s\n");
        p(tcp6s_rcvbadoff,
            "\t\t%ld discarded for bad header offset field%s\n");
        p(tcp6s_rcvshort, "\t\t%ld discarded because packet%s too short\n");
        p(tcp6s_connattempt, "\t%ld connection request%s\n");
        p(tcp6s_accepts, "\t%ld connection accept%s\n");
        p(tcp6s_badsyn, "\t%ld bad connection attempt%s\n");
        p(tcp6s_connects,
            "\t%ld connection%s established (including accepts)\n");
        p2(tcp6s_closed, tcp6s_drops,
            "\t%ld connection%s closed (including %ld drop%s)\n");
        p(tcp6s_conndrops, "\t%ld embryonic connection%s dropped\n");
        p2(tcp6s_rttupdated, tcp6s_segstimed,
            "\t%ld segment%s updated rtt (of %ld attempt%s)\n");
        p(tcp6s_rexmttimeo, "\t%ld retransmit timeout%s\n");
        p(tcp6s_timeoutdrop,
            "\t\t%ld connection%s dropped by rexmit timeout\n");
        p(tcp6s_persisttimeo, "\t%ld persist timeout%s\n");
        p(tcp6s_persistdrop, "\t%ld connection%s timed out in persist\n");
        p(tcp6s_keeptimeo, "\t%ld keepalive timeout%s\n");
        p(tcp6s_keepprobe, "\t\t%ld keepalive probe%s sent\n");
        p(tcp6s_keepdrops, "\t\t%ld connection%s dropped by keepalive\n");
        p(tcp6s_predack, "\t%ld correct ACK header prediction%s\n");
        p(tcp6s_preddat, "\t%ld correct data packet header prediction%s\n");
        p3(tcp6s_pcbcachemiss, "\t%ld PCB cache miss%s\n");
#undef p
#undef p2
#undef p3
}
#endif

/*
 * Dump UDP6 statistics structure.
 */
void
udp6_stats(u_long off, const char *name)
{
        uint64_t udp6stat[UDP6_NSTATS];
        uint64_t delivered;

        if (use_sysctl) {
                size_t size = sizeof(udp6stat);

                if (prog_sysctlbyname("net.inet6.udp6.stats", udp6stat, &size,
                    NULL, 0) == -1 && errno != ENOMEM)
                        return;
        } else {
                warnx("%s stats not available via KVM.", name);
                return;
        }
        printf("%s:\n", name);
#define p(f, m) if (udp6stat[f] || sflag <= 1)                                \
                printf(m, (unsigned long long)udp6stat[f], plural(udp6stat[f]))
#define p1(f, m) if (udp6stat[f] || sflag <= 1)                 \
                printf(m, (unsigned long long)udp6stat[f])
        p(UDP6_STAT_IPACKETS, "\t%llu datagram%s received\n");
        p1(UDP6_STAT_HDROPS, "\t%llu with incomplete header\n");
        p1(UDP6_STAT_BADLEN, "\t%llu with bad data length field\n");
        p1(UDP6_STAT_BADSUM, "\t%llu with bad checksum\n");
        p1(UDP6_STAT_NOSUM, "\t%llu with no checksum\n");
        p1(UDP6_STAT_NOPORT, "\t%llu dropped due to no socket\n");
        p(UDP6_STAT_NOPORTMCAST,
            "\t%llu multicast datagram%s dropped due to no socket\n");
        p1(UDP6_STAT_FULLSOCK, "\t%llu dropped due to full socket buffers\n");
        delivered = udp6stat[UDP6_STAT_IPACKETS] -
                    udp6stat[UDP6_STAT_HDROPS] -
                    udp6stat[UDP6_STAT_BADLEN] -
                    udp6stat[UDP6_STAT_BADSUM] -
                    udp6stat[UDP6_STAT_NOPORT] -
                    udp6stat[UDP6_STAT_NOPORTMCAST] -
                    udp6stat[UDP6_STAT_FULLSOCK];
        if (delivered || sflag <= 1)
                printf("\t%llu delivered\n", (unsigned long long)delivered);
        p(UDP6_STAT_OPACKETS, "\t%llu datagram%s output\n");
#undef p
#undef p1
}

static  const char *ip6nh[] = {
/*0*/   "hop by hop",
        "ICMP",
        "IGMP",
        NULL,
        "IP",
/*5*/   NULL,
        "TCP",
        NULL,
        NULL,
        NULL,
/*10*/  NULL, NULL, NULL, NULL, NULL,
/*15*/  NULL,
        NULL,
        "UDP",
        NULL,
        NULL,
/*20*/  NULL,
        NULL,
        "IDP",
        NULL,
        NULL,
/*25*/  NULL,
        NULL,
        NULL,
        NULL,
        NULL,
/*30*/  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
/*40*/  NULL,
        "IP6",
        NULL,
        "routing",
        "fragment",
/*45*/  NULL, NULL, NULL, NULL, NULL,
/*50*/  "ESP",
        "AH",
        NULL,
        NULL,
        NULL,
/*55*/  NULL,
        NULL,
        NULL,
        "ICMP6",
        "no next header",
/*60*/  "destination option",
        NULL,
        NULL,
        NULL,
        NULL,
/*65*/  NULL, NULL, NULL, NULL, NULL,
/*70*/  NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
/*80*/  NULL,
        NULL,
        NULL,
        NULL,
        NULL,
        NULL,
        NULL,
        NULL,
        NULL,
        "OSPF",
/*90*/  NULL, NULL, NULL, NULL, NULL,
/*95*/  NULL,
        NULL,
        "Ethernet",
        NULL,
        NULL,
/*100*/ NULL,
        NULL,
        NULL,
        "PIM",
        NULL,
/*105*/ NULL, NULL, NULL, NULL, NULL,
/*110*/ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
/*120*/ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
/*130*/ NULL,
        NULL,
        "SCTP",
        NULL,
        NULL,
/*135*/ NULL, NULL, NULL, NULL, NULL,
/*140*/ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
        NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
/*160*/ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
        NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
/*180*/ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
        NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
/*200*/ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
        NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
/*220*/ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
        NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
/*240*/ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
        NULL, NULL, NULL, NULL, NULL, NULL
};

/*
 * Dump IP6 statistics structure.
 */
void
ip6_stats(u_long off, const char *name)
{
        uint64_t ip6stat[IP6_NSTATS];
        int first, i;
        struct protoent *ep;
        const char *n;

        if (use_sysctl) {
                size_t size = sizeof(ip6stat);

                if (prog_sysctlbyname("net.inet6.ip6.stats", ip6stat, &size,
                    NULL, 0) == -1 && errno != ENOMEM)
                        return;
        } else {
                warnx("%s stats not available via KVM.", name);
                return;
        }
        printf("%s:\n", name);

#define p(f, m) if (ip6stat[f] || sflag <= 1)                                \
                printf(m, (unsigned long long)ip6stat[f], plural(ip6stat[f]))
#define p1(f, m) if (ip6stat[f] || sflag <= 1)                  \
                printf(m, (unsigned long long)ip6stat[f])

        p(IP6_STAT_TOTAL, "\t%llu total packet%s received\n");
        p1(IP6_STAT_TOOSMALL, "\t%llu with size smaller than minimum\n");
        p1(IP6_STAT_TOOSHORT, "\t%llu with data size < data length\n");
        p1(IP6_STAT_BADOPTIONS, "\t%llu with bad options\n");
        p1(IP6_STAT_BADVERS, "\t%llu with incorrect version number\n");
        p(IP6_STAT_FRAGMENTS, "\t%llu fragment%s received\n");
        p(IP6_STAT_FRAGDROPPED,
            "\t%llu fragment%s dropped (dup or out of space)\n");
        p(IP6_STAT_FRAGTIMEOUT, "\t%llu fragment%s dropped after timeout\n");
        p(IP6_STAT_FRAGOVERFLOW, "\t%llu fragment%s that exceeded limit\n");
        p(IP6_STAT_REASSEMBLED, "\t%llu packet%s reassembled ok\n");
        p(IP6_STAT_DELIVERED, "\t%llu packet%s for this host\n");
        p(IP6_STAT_FORWARD, "\t%llu packet%s forwarded\n");
        p(IP6_STAT_FASTFORWARD, "\t%llu packet%s fast forwarded\n");
        p1(IP6_STAT_FASTFORWARDFLOWS, "\t%llu fast forward flows\n");
        p(IP6_STAT_CANTFORWARD, "\t%llu packet%s not forwardable\n");
        p(IP6_STAT_REDIRECTSENT, "\t%llu redirect%s sent\n");
        p(IP6_STAT_LOCALOUT, "\t%llu packet%s sent from this host\n");
        p(IP6_STAT_RAWOUT, "\t%llu packet%s sent with fabricated ip header\n");
        p(IP6_STAT_ODROPPED,
            "\t%llu output packet%s dropped due to no bufs, etc.\n");
        p(IP6_STAT_NOROUTE,
            "\t%llu output packet%s discarded due to no route\n");
        p(IP6_STAT_FRAGMENTED, "\t%llu output datagram%s fragmented\n");
        p(IP6_STAT_OFRAGMENTS, "\t%llu fragment%s created\n");
        p(IP6_STAT_CANTFRAG, "\t%llu datagram%s that can't be fragmented\n");
        p(IP6_STAT_BADSCOPE, "\t%llu packet%s that violated scope rules\n");
        p(IP6_STAT_NOTMEMBER, "\t%llu multicast packet%s which we don't join\n");
        for (first = 1, i = 0; i < 256; i++)
                if (ip6stat[IP6_STAT_NXTHIST + i] != 0) {
                        if (first) {
                                printf("\tInput packet histogram:\n");
                                first = 0;
                        }
                        n = NULL;
                        if (ip6nh[i])
                                n = ip6nh[i];
                        else if ((ep = getprotobynumber(i)) != NULL)
                                n = ep->p_name;
                        if (n)
                                printf("\t\t%s: %llu\n", n,
                                    (unsigned long long)ip6stat[IP6_STAT_NXTHIST + i]);
                        else
                                printf("\t\t#%d: %llu\n", i,
                                    (unsigned long long)ip6stat[IP6_STAT_NXTHIST + i]);
                }
        printf("\tMbuf statistics:\n");
        p(IP6_STAT_M1, "\t\t%llu one mbuf%s\n");
        for (first = 1, i = 0; i < 32; i++) {
                char ifbuf[IFNAMSIZ];
                if (ip6stat[IP6_STAT_M2M + i] != 0) {
                        if (first) {
                                printf("\t\ttwo or more mbuf:\n");
                                first = 0;
                        }
                        printf("\t\t\t%s = %llu\n",
                            if_indextoname(i, ifbuf),
                            (unsigned long long)ip6stat[IP6_STAT_M2M + i]);
                }
        }
        p(IP6_STAT_MEXT1, "\t\t%llu one ext mbuf%s\n");
        p(IP6_STAT_MEXT2M, "\t\t%llu two or more ext mbuf%s\n");
        p(IP6_STAT_EXTHDRTOOLONG,
            "\t%llu packet%s whose headers are not continuous\n");
        p(IP6_STAT_NOGIF, "\t%llu tunneling packet%s that can't find gif\n");
        p(IP6_STAT_NOIPSEC,
            "\t%llu tunneling packet%s that can't find ipsecif\n");
        p(IP6_STAT_TOOMANYHDR,
            "\t%llu packet%s discarded due to too many headers\n");

        /* for debugging source address selection */
#define PRINT_SCOPESTAT(s, i) do {                              \
                switch (i) { /* XXX hardcoding in each case */  \
                case 1:                                         \
                        p(s, "\t\t%llu node-local%s\n");        \
                        break;                                  \
                case 2:                                         \
                        p(s, "\t\t%llu link-local%s\n");        \
                        break;                                  \
                case 5:                                         \
                        p(s, "\t\t%llu site-local%s\n");        \
                        break;                                  \
                case 14:                                        \
                        p(s, "\t\t%llu global%s\n");            \
                        break;                                  \
                default:                                        \
                        printf("\t\t%llu addresses scope=%x\n", \
                            (unsigned long long)ip6stat[s], i); \
                }                                               \
        } while(0);

        p(IP6_STAT_SOURCES_NONE,
          "\t%llu failure%s of source address selection\n");
        for (first = 1, i = 0; i < 16; i++) {
                if (ip6stat[IP6_STAT_SOURCES_SAMEIF + i]) {
                        if (first) {
                                printf("\tsource addresses on an outgoing I/F\n");
                                first = 0;
                        }
                        PRINT_SCOPESTAT(IP6_STAT_SOURCES_SAMEIF + i, i);
                }
        }
        for (first = 1, i = 0; i < 16; i++) {
                if (ip6stat[IP6_STAT_SOURCES_OTHERIF + i]) {
                        if (first) {
                                printf("\tsource addresses on a non-outgoing I/F\n");
                                first = 0;
                        }
                        PRINT_SCOPESTAT(IP6_STAT_SOURCES_OTHERIF + i, i);
                }
        }
        for (first = 1, i = 0; i < 16; i++) {
                if (ip6stat[IP6_STAT_SOURCES_SAMESCOPE + i]) {
                        if (first) {
                                printf("\tsource addresses of same scope\n");
                                first = 0;
                        }
                        PRINT_SCOPESTAT(IP6_STAT_SOURCES_SAMESCOPE + i, i);
                }
        }
        for (first = 1, i = 0; i < 16; i++) {
                if (ip6stat[IP6_STAT_SOURCES_OTHERSCOPE + i]) {
                        if (first) {
                                printf("\tsource addresses of a different scope\n");
                                first = 0;
                        }
                        PRINT_SCOPESTAT(IP6_STAT_SOURCES_OTHERSCOPE + i, i);
                }
        }
        for (first = 1, i = 0; i < 16; i++) {
                if (ip6stat[IP6_STAT_SOURCES_DEPRECATED + i]) {
                        if (first) {
                                printf("\tdeprecated source addresses\n");
                                first = 0;
                        }
                        PRINT_SCOPESTAT(IP6_STAT_SOURCES_DEPRECATED + i, i);
                }
        }

        p1(IP6_STAT_FORWARD_CACHEHIT, "\t%llu forward cache hit\n");
        p1(IP6_STAT_FORWARD_CACHEMISS, "\t%llu forward cache miss\n");
        p(IP6_STAT_PFILDROP_IN, "\t%llu input packet%s dropped by pfil\n");
        p(IP6_STAT_PFILDROP_OUT, "\t%llu output packet%s dropped by pfil\n");
        p(IP6_STAT_IPSECDROP_IN, "\t%llu input packet%s dropped by IPsec\n");
        p(IP6_STAT_IPSECDROP_OUT, "\t%llu output packet%s dropped by IPsec\n");
        p(IP6_STAT_IFDROP,
            "\t%llu input packet%s dropped due to interface state\n");
        p(IP6_STAT_IDROPPED,
            "\t%llu input packet%s dropped due to no bufs, etc.\n");
        p(IP6_STAT_TIMXCEED,
            "\t%llu packet%s dropped due to hop limit exceeded\n");
        p(IP6_STAT_TOOBIG, "\t%llu packet%s dropped (too big)\n");
        p(IP6_STAT_RTREJECT,
            "\t%llu output packet%s discarded due to reject route\n");
#undef p
#undef p1
}

/*
 * Dump IPv6 per-interface statistics based on RFC 2465.
 */
void
ip6_ifstats(const char *ifname)
{
        struct in6_ifreq ifr;
        int s;
#define p(f, m) if (ifr.ifr_ifru.ifru_stat.f || sflag <= 1)             \
                printf(m, (unsigned long long)ifr.ifr_ifru.ifru_stat.f, \
                    plural(ifr.ifr_ifru.ifru_stat.f))
#define p_5(f, m) if (ifr.ifr_ifru.ifru_stat.f || sflag <= 1)   \
                printf(m, (unsigned long long)ip6stat.f)

        if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
                perror("Warning: socket(AF_INET6)");
                return;
        }

        strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
        printf("ip6 on %s:\n", ifname);

        if (ioctl(s, SIOCGIFSTAT_IN6, (char *)&ifr) < 0) {
                perror("Warning: ioctl(SIOCGIFSTAT_IN6)");
                goto end;
        }

        p(ifs6_in_receive, "\t%llu total input datagram%s\n");
        p(ifs6_in_hdrerr, "\t%llu datagram%s with invalid header received\n");
        p(ifs6_in_toobig, "\t%llu datagram%s exceeded MTU received\n");
        p(ifs6_in_noroute, "\t%llu datagram%s with no route received\n");
        p(ifs6_in_addrerr, "\t%llu datagram%s with invalid dst received\n");
        p(ifs6_in_truncated, "\t%llu truncated datagram%s received\n");
        p(ifs6_in_protounknown,
            "\t%llu datagram%s with unknown proto received\n");
        p(ifs6_in_discard, "\t%llu input datagram%s discarded\n");
        p(ifs6_in_deliver,
            "\t%llu datagram%s delivered to an upper layer protocol\n");
        p(ifs6_out_forward, "\t%llu datagram%s forwarded to this interface\n");
        p(ifs6_out_request,
            "\t%llu datagram%s sent from an upper layer protocol\n");
        p(ifs6_out_discard, "\t%llu total discarded output datagram%s\n");
        p(ifs6_out_fragok, "\t%llu output datagram%s fragmented\n");
        p(ifs6_out_fragfail, "\t%llu output datagram%s failed on fragment\n");
        p(ifs6_out_fragcreat,
            "\t%llu output datagram%s succeeded on fragment\n");
        p(ifs6_reass_reqd, "\t%llu incoming datagram%s fragmented\n");
        p(ifs6_reass_ok, "\t%llu datagram%s reassembled\n");
        p(ifs6_reass_fail, "\t%llu datagram%s failed on reassembling\n");
        p(ifs6_in_mcast, "\t%llu multicast datagram%s received\n");
        p(ifs6_out_mcast, "\t%llu multicast datagram%s sent\n");

  end:
        close(s);

#undef p
#undef p_5
}

static  const char *icmp6names[256] = {
        "#0",
        "unreach",
        "packet too big",
        "time exceed",
        "parameter problem",
        "#5",
        "#6",
        "#7",
        "#8",
        "#9",
        "#10",
        "#11",
        "#12",
        "#13",
        "#14",
        "#15",
        "#16",
        "#17",
        "#18",
        "#19",
        "#20",
        "#21",
        "#22",
        "#23",
        "#24",
        "#25",
        "#26",
        "#27",
        "#28",
        "#29",
        "#30",
        "#31",
        "#32",
        "#33",
        "#34",
        "#35",
        "#36",
        "#37",
        "#38",
        "#39",
        "#40",
        "#41",
        "#42",
        "#43",
        "#44",
        "#45",
        "#46",
        "#47",
        "#48",
        "#49",
        "#50",
        "#51",
        "#52",
        "#53",
        "#54",
        "#55",
        "#56",
        "#57",
        "#58",
        "#59",
        "#60",
        "#61",
        "#62",
        "#63",
        "#64",
        "#65",
        "#66",
        "#67",
        "#68",
        "#69",
        "#70",
        "#71",
        "#72",
        "#73",
        "#74",
        "#75",
        "#76",
        "#77",
        "#78",
        "#79",
        "#80",
        "#81",
        "#82",
        "#83",
        "#84",
        "#85",
        "#86",
        "#87",
        "#88",
        "#89",
        "#80",
        "#91",
        "#92",
        "#93",
        "#94",
        "#95",
        "#96",
        "#97",
        "#98",
        "#99",
        "#100",
        "#101",
        "#102",
        "#103",
        "#104",
        "#105",
        "#106",
        "#107",
        "#108",
        "#109",
        "#110",
        "#111",
        "#112",
        "#113",
        "#114",
        "#115",
        "#116",
        "#117",
        "#118",
        "#119",
        "#120",
        "#121",
        "#122",
        "#123",
        "#124",
        "#125",
        "#126",
        "#127",
        "echo",
        "echo reply",
        "multicast listener query",
        "multicast listener report",
        "multicast listener done",
        "router solicitation",
        "router advertisement",
        "neighbor solicitation",
        "neighbor advertisement",
        "redirect",
        "router renumbering",
        "node information request",
        "node information reply",
        "#141",
        "#142",
        "multicast listener report (v2)",
        "home agent discovery request",
        "home agent discovery reply",
        "mobile prefix solicitation",
        "mobile prefix advertisement",
        "#148",
        "#149",
        "#150",
        "multicast router advertisement",
        "multicast router solicitation",
        "multicast router termination",
        "#154",
        "#155",
        "#156",
        "#157",
        "#158",
        "#159",
        "#160",
        "#161",
        "#162",
        "#163",
        "#164",
        "#165",
        "#166",
        "#167",
        "#168",
        "#169",
        "#170",
        "#171",
        "#172",
        "#173",
        "#174",
        "#175",
        "#176",
        "#177",
        "#178",
        "#179",
        "#180",
        "#181",
        "#182",
        "#183",
        "#184",
        "#185",
        "#186",
        "#187",
        "#188",
        "#189",
        "#180",
        "#191",
        "#192",
        "#193",
        "#194",
        "#195",
        "#196",
        "#197",
        "#198",
        "#199",
        "#200",
        "#201",
        "#202",
        "#203",
        "#204",
        "#205",
        "#206",
        "#207",
        "#208",
        "#209",
        "#210",
        "#211",
        "#212",
        "#213",
        "#214",
        "#215",
        "#216",
        "#217",
        "#218",
        "#219",
        "#220",
        "#221",
        "#222",
        "#223",
        "#224",
        "#225",
        "#226",
        "#227",
        "#228",
        "#229",
        "#230",
        "#231",
        "#232",
        "#233",
        "#234",
        "#235",
        "#236",
        "#237",
        "#238",
        "#239",
        "#240",
        "#241",
        "#242",
        "#243",
        "#244",
        "#245",
        "#246",
        "#247",
        "#248",
        "#249",
        "#250",
        "#251",
        "#252",
        "#253",
        "#254",
        "#255"
};

/*
 * Dump ICMPv6 statistics.
 */
void
icmp6_stats(u_long off, const char *name)
{
        uint64_t icmp6stat[ICMP6_NSTATS];
        int i, first;

        if (use_sysctl) {
                size_t size = sizeof(icmp6stat);

                if (prog_sysctlbyname("net.inet6.icmp6.stats", icmp6stat,
                    &size, NULL, 0) == -1 && errno != ENOMEM)
                        return;
        } else {
                warnx("%s stats not available via KVM.", name);
                return;
        }

        printf("%s:\n", name);

#define p(f, m) if (icmp6stat[f] || sflag <= 1)                 \
                printf(m, (unsigned long long)icmp6stat[f],     \
                    plural(icmp6stat[f]))
#define p_oerr(f, m) if (icmp6stat[ICMP6_STAT_OUTERRHIST + f] || sflag <= 1) \
                printf(m,                                                    \
                    (unsigned long long)icmp6stat[ICMP6_STAT_OUTERRHIST + f])

        p(ICMP6_STAT_ERROR, "\t%llu call%s to icmp6_error\n");
        p(ICMP6_STAT_CANTERROR,
            "\t%llu error%s not generated because old message was icmp6 or so\n");
        p(ICMP6_STAT_TOOFREQ,
            "\t%llu error%s not generated because of rate limitation\n");
        for (first = 1, i = 0; i < 256; i++)
                if (icmp6stat[ICMP6_STAT_OUTHIST + i] != 0) {
                        if (first) {
                                printf("\tOutput packet histogram:\n");
                                first = 0;
                        }
                        printf("\t\t%s: %llu\n", icmp6names[i],
                         (unsigned long long)icmp6stat[ICMP6_STAT_OUTHIST + i]);
                }
        p(ICMP6_STAT_BADCODE, "\t%llu message%s with bad code fields\n");
        p(ICMP6_STAT_TOOSHORT, "\t%llu message%s < minimum length\n");
        p(ICMP6_STAT_CHECKSUM, "\t%llu bad checksum%s\n");
        p(ICMP6_STAT_BADLEN, "\t%llu message%s with bad length\n");
        for (first = 1, i = 0; i < ICMP6_MAXTYPE; i++)
                if (icmp6stat[ICMP6_STAT_INHIST + i] != 0) {
                        if (first) {
                                printf("\tInput packet histogram:\n");
                                first = 0;
                        }
                        printf("\t\t%s: %llu\n", icmp6names[i],
                          (unsigned long long)icmp6stat[ICMP6_STAT_INHIST + i]);
                }
        printf("\tHistogram of error messages to be generated:\n");
        p_oerr(ICMP6_ERRSTAT_DST_UNREACH_NOROUTE, "\t\t%llu no route\n");
        p_oerr(ICMP6_ERRSTAT_DST_UNREACH_ADMIN,
            "\t\t%llu administratively prohibited\n");
        p_oerr(ICMP6_ERRSTAT_DST_UNREACH_BEYONDSCOPE,
            "\t\t%llu beyond scope\n");
        p_oerr(ICMP6_ERRSTAT_DST_UNREACH_ADDR,
            "\t\t%llu address unreachable\n");
        p_oerr(ICMP6_ERRSTAT_DST_UNREACH_NOPORT,
            "\t\t%llu port unreachable\n");
        p_oerr(ICMP6_ERRSTAT_PACKET_TOO_BIG, "\t\t%llu packet too big\n");
        p_oerr(ICMP6_ERRSTAT_TIME_EXCEED_TRANSIT,
            "\t\t%llu time exceed transit\n");
        p_oerr(ICMP6_ERRSTAT_TIME_EXCEED_REASSEMBLY,
            "\t\t%llu time exceed reassembly\n");
        p_oerr(ICMP6_ERRSTAT_PARAMPROB_HEADER,
            "\t\t%llu erroneous header field\n");
        p_oerr(ICMP6_ERRSTAT_PARAMPROB_NEXTHEADER,
            "\t\t%llu unrecognized next header\n");
        p_oerr(ICMP6_ERRSTAT_PARAMPROB_OPTION,
            "\t\t%llu unrecognized option\n");
        p_oerr(ICMP6_ERRSTAT_REDIRECT, "\t\t%llu redirect\n");
        p_oerr(ICMP6_ERRSTAT_UNKNOWN, "\t\t%llu unknown\n");

        p(ICMP6_STAT_REFLECT, "\t%llu message response%s generated\n");
        p(ICMP6_STAT_ND_TOOMANYOPT,
            "\t%llu message%s with too many ND options\n");
        p(ICMP6_STAT_ND_BADOPT, "\t%llu message%s with bad ND options\n");
        p(ICMP6_STAT_BADNS, "\t%llu bad neighbor solicitation message%s\n");
        p(ICMP6_STAT_BADNA, "\t%llu bad neighbor advertisement message%s\n");
        p(ICMP6_STAT_BADRS, "\t%llu bad router solicitation message%s\n");
        p(ICMP6_STAT_BADRA, "\t%llu bad router advertisement message%s\n");
        p(ICMP6_STAT_DROPPED_RAROUTE,
            "\t%llu router advertisement route%s dropped\n");
        p(ICMP6_STAT_BADREDIRECT, "\t%llu bad redirect message%s\n");
        p(ICMP6_STAT_PMTUCHG, "\t%llu path MTU change%s\n");
#undef p
#undef p_oerr
}

/*
 * Dump ICMPv6 per-interface statistics based on RFC 2466.
 */
void
icmp6_ifstats(const char *ifname)
{
        struct in6_ifreq ifr;
        int s;
#define p(f, m) if (ifr.ifr_ifru.ifru_icmp6stat.f || sflag <= 1)              \
                printf(m, (unsigned long long)ifr.ifr_ifru.ifru_icmp6stat.f,  \
                    plural(ifr.ifr_ifru.ifru_icmp6stat.f))

        if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
                perror("Warning: socket(AF_INET6)");
                return;
        }

        strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
        printf("icmp6 on %s:\n", ifname);

        if (ioctl(s, SIOCGIFSTAT_ICMP6, (char *)&ifr) < 0) {
                perror("Warning: ioctl(SIOCGIFSTAT_ICMP6)");
                goto end;
        }

        p(ifs6_in_msg, "\t%llu total input message%s\n");
        p(ifs6_in_error, "\t%llu total input error message%s\n");
        p(ifs6_in_dstunreach,
            "\t%llu input destination unreachable error%s\n");
        p(ifs6_in_adminprohib,
            "\t%llu input administratively prohibited error%s\n");
        p(ifs6_in_timeexceed, "\t%llu input time exceeded error%s\n");
        p(ifs6_in_paramprob, "\t%llu input parameter problem error%s\n");
        p(ifs6_in_pkttoobig, "\t%llu input packet too big error%s\n");
        p(ifs6_in_echo, "\t%llu input echo request%s\n");
        p(ifs6_in_echoreply, "\t%llu input echo reply%s\n");
        p(ifs6_in_routersolicit, "\t%llu input router solicitation%s\n");
        p(ifs6_in_routeradvert, "\t%llu input router advertisement%s\n");
        p(ifs6_in_neighborsolicit, "\t%llu input neighbor solicitation%s\n");
        p(ifs6_in_neighboradvert, "\t%llu input neighbor advertisement%s\n");
        p(ifs6_in_redirect, "\t%llu input redirect%s\n");
        p(ifs6_in_mldquery, "\t%llu input MLD query%s\n");
        p(ifs6_in_mldreport, "\t%llu input MLD report%s\n");
        p(ifs6_in_mlddone, "\t%llu input MLD done%s\n");

        p(ifs6_out_msg, "\t%llu total output message%s\n");
        p(ifs6_out_error, "\t%llu total output error message%s\n");
        p(ifs6_out_dstunreach,
            "\t%llu output destination unreachable error%s\n");
        p(ifs6_out_adminprohib,
            "\t%llu output administratively prohibited error%s\n");
        p(ifs6_out_timeexceed, "\t%llu output time exceeded error%s\n");
        p(ifs6_out_paramprob, "\t%llu output parameter problem error%s\n");
        p(ifs6_out_pkttoobig, "\t%llu output packet too big error%s\n");
        p(ifs6_out_echo, "\t%llu output echo request%s\n");
        p(ifs6_out_echoreply, "\t%llu output echo reply%s\n");
        p(ifs6_out_routersolicit, "\t%llu output router solicitation%s\n");
        p(ifs6_out_routeradvert, "\t%llu output router advertisement%s\n");
        p(ifs6_out_neighborsolicit, "\t%llu output neighbor solicitation%s\n");
        p(ifs6_out_neighboradvert, "\t%llu output neighbor advertisement%s\n");
        p(ifs6_out_redirect, "\t%llu output redirect%s\n");
        p(ifs6_out_mldquery, "\t%llu output MLD query%s\n");
        p(ifs6_out_mldreport, "\t%llu output MLD report%s\n");
        p(ifs6_out_mlddone, "\t%llu output MLD done%s\n");

  end:
        close(s);
#undef p
}

/*
 * Dump PIM statistics structure.
 */
void
pim6_stats(u_long off, const char *name)
{
        uint64_t pim6stat[PIM6_NSTATS];

        if (use_sysctl) {
                size_t size = sizeof(pim6stat);

                if (prog_sysctlbyname("net.inet6.pim6.stats", pim6stat, &size,
                    NULL, 0) == -1 && errno != ENOMEM)
                        return;
        } else {
                warnx("%s stats not available via KVM.", name);
                return;
        }
        printf("%s:\n", name);

#define p(f, m) if (pim6stat[f] || sflag <= 1)                                \
                printf(m, (unsigned long long)pim6stat[f], plural(pim6stat[f]))

        p(PIM6_STAT_RCV_TOTAL, "\t%llu message%s received\n");
        p(PIM6_STAT_RCV_TOOSHORT,
            "\t%llu message%s received with too few bytes\n");
        p(PIM6_STAT_RCV_BADSUM,
            "\t%llu message%s received with bad checksum\n");
        p(PIM6_STAT_RCV_BADVERSION,
            "\t%llu message%s received with bad version\n");
        p(PIM6_STAT_RCV_REGISTERS, "\t%llu register%s received\n");
        p(PIM6_STAT_RCV_BADREGISTERS, "\t%llu bad register%s received\n");
        p(PIM6_STAT_SND_REGISTERS, "\t%llu register%s sent\n");
#undef p
}

/*
 * Dump raw ip6 statistics structure.
 */
void
rip6_stats(u_long off, const char *name)
{
        uint64_t rip6stat[RIP6_NSTATS];
        uint64_t delivered;

        if (use_sysctl) {
                size_t size = sizeof(rip6stat);

                if (prog_sysctlbyname("net.inet6.raw6.stats", rip6stat, &size,
                    NULL, 0) == -1 && errno != ENOMEM)
                        return;
        } else {
                warnx("%s stats not available via KVM.", name);
                return;
        }
        printf("%s:\n", name);

#define p(f, m) if (rip6stat[f] || sflag <= 1) \
    printf(m, (unsigned long long)rip6stat[f], plural(rip6stat[f]))
        p(RIP6_STAT_IPACKETS, "\t%llu message%s received\n");
        p(RIP6_STAT_ISUM, "\t%llu checksum calculation%s on inbound\n");
        p(RIP6_STAT_BADSUM, "\t%llu message%s with bad checksum\n");
        p(RIP6_STAT_NOSOCK, "\t%llu message%s dropped due to no socket\n");
        p(RIP6_STAT_NOSOCKMCAST,
            "\t%llu multicast message%s dropped due to no socket\n");
        p(RIP6_STAT_FULLSOCK,
            "\t%llu message%s dropped due to full socket buffers\n");
        delivered = rip6stat[RIP6_STAT_IPACKETS] -
                    rip6stat[RIP6_STAT_BADSUM] -
                    rip6stat[RIP6_STAT_NOSOCK] -
                    rip6stat[RIP6_STAT_NOSOCKMCAST] -
                    rip6stat[RIP6_STAT_FULLSOCK];
        if (delivered || sflag <= 1)
                printf("\t%llu delivered\n", (unsigned long long)delivered);
        p(RIP6_STAT_OPACKETS, "\t%llu datagram%s output\n");
#undef p
}

/*
 * Pretty print an Internet address (net address + port).
 * Take numeric_addr and numeric_port into consideration.
 */
void
inet6print(const struct in6_addr *in6, int port, const char *proto)
{
#define GETSERVBYPORT6(port, proto, ret)                                \
        do {                                                            \
                if (strcmp((proto), "tcp6") == 0)                       \
                        (ret) = getservbyport((int)(port), "tcp");      \
                else if (strcmp((proto), "udp6") == 0)                  \
                        (ret) = getservbyport((int)(port), "udp");      \
                else                                                    \
                        (ret) = getservbyport((int)(port), (proto));    \
        } while (0)

        struct servent *sp = 0;
        char line[80], *cp;
        int lwidth;

        lwidth = Aflag ? 12 : 16;
        if (vflag && lwidth < (int)strlen(inet6name(in6)))
                lwidth = strlen(inet6name(in6));
        snprintf(line, sizeof(line), "%.*s.", lwidth, inet6name(in6));
        cp = strchr(line, '\0');
        if (!numeric_port && port)
                GETSERVBYPORT6(port, proto, sp);
        if (sp || port == 0)
                snprintf(cp, sizeof(line) - (cp - line),
                    "%s", sp ? sp->s_name : "*");
        else
                snprintf(cp, sizeof(line) - (cp - line),
                    "%d", ntohs((u_short)port));
        lwidth = Aflag ? 18 : 22;
        if (vflag && lwidth < (int)strlen(line))
                lwidth = strlen(line);
        printf(" %-*.*s", lwidth, lwidth, line);
}

/*
 * Construct an Internet address representation.
 * If the numeric_addr has been supplied, give
 * numeric value, otherwise try for symbolic name.
 */

char *
inet6name(const struct in6_addr *inp)
{
        char *cp;
        static char line[NI_MAXHOST];
        struct hostent *hp;
        static char domain[MAXHOSTNAMELEN + 1];
        static int first = 1;
        char hbuf[NI_MAXHOST];
        struct sockaddr_in6 sin6;
        const int niflag = NI_NUMERICHOST;

        if (first && !numeric_addr) {
                first = 0;
                if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
                    (cp = strchr(domain, '.')))
                        (void) strlcpy(domain, cp + 1, sizeof(domain));
                else
                        domain[0] = 0;
        }
        cp = 0;
        if (!numeric_addr && !IN6_IS_ADDR_UNSPECIFIED(inp)) {
                hp = gethostbyaddr((const char *)inp, sizeof(*inp), AF_INET6);
                if (hp) {
                        if ((cp = strchr(hp->h_name, '.')) &&
                            !strcmp(cp + 1, domain))
                                *cp = 0;
                        cp = hp->h_name;
                }
        }
        if (IN6_IS_ADDR_UNSPECIFIED(inp))
                strlcpy(line, "*", sizeof(line));
        else if (cp)
                strlcpy(line, cp, sizeof(line));
        else {
                memset(&sin6, 0, sizeof(sin6));
                sin6.sin6_len = sizeof(sin6);
                sin6.sin6_family = AF_INET6;
                sin6.sin6_addr = *inp;
                inet6_getscopeid(&sin6,
                    INET6_IS_ADDR_LINKLOCAL | INET6_IS_ADDR_MC_LINKLOCAL);
                if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
                                hbuf, sizeof(hbuf), NULL, 0, niflag) != 0)
                        strlcpy(hbuf, "?", sizeof(hbuf));
                strlcpy(line, hbuf, sizeof(line));
        }
        return line;
}

/*
 * Dump the contents of a TCP6 PCB.
 */
void
tcp6_dump(u_long off, const char *name, u_long pcbaddr)
{
        callout_impl_t *ci;
        int i, hardticks;
        struct kinfo_pcb *pcblist;
#ifdef TCP6
#define mypcb tcp6cb
#else
#define mypcb tcpcb
#endif
        size_t j, len;

        if (use_sysctl)
                pcblist = getpcblist_sysctl(name, &len);
        else
                pcblist = getpcblist_kmem(off, name, &len);

        for (j = 0; j < len; j++)
                if (pcblist[j].ki_ppcbaddr == pcbaddr)
                        break;
        free(pcblist);

        if (j == len)
                errx(1, "0x%lx is not a valid pcb address", pcbaddr);

        kread(pcbaddr, (char *)&mypcb, sizeof(mypcb));
        hardticks = get_hardticks();

        printf("TCP Protocol Control Block at 0x%08lx:\n\n", pcbaddr);
        printf("Timers:\n");
        for (i = 0; i < TCP6T_NTIMERS; i++) {
                char buf[128];
                ci = (callout_impl_t *)&tcpcb.t_timer[i];
                snprintb(buf, sizeof(buf), CALLOUT_FMT, ci->c_flags);
                printf("\t%s\t%s", tcptimers[i], buf);
                if (ci->c_flags & CALLOUT_PENDING)
                        printf("\t%d\n", ci->c_time - hardticks);
                else
                        printf("\n");
        }
        printf("\n\n");

        if (mypcb.t_state < 0 || mypcb.t_state >= TCP6_NSTATES)
                printf("State: %d", mypcb.t_state);
        else
                printf("State: %s", tcp6states[mypcb.t_state]);
        printf(", flags 0x%x, inpcb 0x%lx\n\n", mypcb.t_flags,
            (u_long)mypcb.t_inpcb);

        printf("rxtshift %d, rxtcur %d, dupacks %d\n", mypcb.t_rxtshift,
            mypcb.t_rxtcur, mypcb.t_dupacks);
#ifdef TCP6
        printf("peermaxseg %u, maxseg %u, force %d\n\n", mypcb.t_peermaxseg,
            mypcb.t_maxseg, mypcb.t_force);
#else
        printf("peermss %u, ourmss %u, segsz %u, segqlen %u\n\n",
            tcpcb.t_peermss, tcpcb.t_ourmss, tcpcb.t_segsz, tcpcb.t_segqlen);
#endif

        printf("snd_una %u, snd_nxt %u, snd_up %u\n",
            mypcb.snd_una, mypcb.snd_nxt, mypcb.snd_up);
        printf("snd_wl1 %u, snd_wl2 %u, iss %u, snd_wnd %llu\n\n",
            mypcb.snd_wl1, mypcb.snd_wl2, mypcb.iss,
            (unsigned long long)mypcb.snd_wnd);

        printf("rcv_wnd %llu, rcv_nxt %u, rcv_up %u, irs %u\n\n",
            (unsigned long long)mypcb.rcv_wnd, mypcb.rcv_nxt,
            mypcb.rcv_up, mypcb.irs);

        printf("rcv_adv %u, snd_max %u, snd_cwnd %llu, snd_ssthresh %llu\n",
            mypcb.rcv_adv, mypcb.snd_max, (unsigned long long)mypcb.snd_cwnd,
            (unsigned long long)mypcb.snd_ssthresh);

#ifdef TCP6
        printf("idle %d, rtt %d, " mypcb.t_idle, mypcb.t_rtt);
#else
        printf("rcvtime %u, rtttime %u, ", tcpcb.t_rcvtime, tcpcb.t_rtttime);
#endif

        printf("rtseq %u, srtt %d, rttvar %d, rttmin %d, "
            "max_sndwnd %llu\n\n", mypcb.t_rtseq,
            mypcb.t_srtt, mypcb.t_rttvar, mypcb.t_rttmin,
            (unsigned long long)mypcb.max_sndwnd);

        printf("oobflags %d, iobc %d, softerror %d\n\n", mypcb.t_oobflags,
            mypcb.t_iobc, mypcb.t_softerror);

        printf("snd_scale %d, rcv_scale %d, req_r_scale %d, req_s_scale %d\n",
            mypcb.snd_scale, mypcb.rcv_scale, mypcb.request_r_scale,
            mypcb.requested_s_scale);
        printf("ts_recent %u, ts_regent_age %d, last_ack_sent %u\n",
            mypcb.ts_recent, mypcb.ts_recent_age, mypcb.last_ack_sent);
}

#endif /*INET6*/