xref: /freebsd-11-stable/usr.bin/netstat/inet6.c

/*	BSDI inet.c,v 2.3 1995/10/24 02:19:29 prb Exp	*/
/*
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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.
 */

#if 0
#ifndef lint
static char sccsid[] = "@(#)inet6.c	8.4 (Berkeley) 4/20/94";
#endif /* not lint */
#endif

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: head/usr.bin/netstat/inet6.c 160373 2006-07-14 23:32:43Z julian $");

#ifdef INET6
#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 <net/if_var.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
#include <netinet/icmp6.h>
#include <netinet/in_systm.h>
#include <netinet6/in6_pcb.h>
#include <netinet6/in6_var.h>
#include <netinet6/ip6_var.h>
#include <netinet6/pim6_var.h>
#include <netinet6/raw_ip6.h>

#include <arpa/inet.h>
#include <netdb.h>

#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "netstat.h"

struct	socket sockb;

char	*inet6name(struct in6_addr *);
const char *pluralies(int);

static char ntop_buf[INET6_ADDRSTRLEN];

static	const char *ip6nh[] = {
	"hop by hop",
	"ICMP",
	"IGMP",
	"#3",
	"IP",
	"#5",
	"TCP",
	"#7",
	"#8",
	"#9",
	"#10",
	"#11",
	"#12",
	"#13",
	"#14",
	"#15",
	"#16",
	"UDP",
	"#18",
	"#19",
	"#20",
	"#21",
	"IDP",
	"#23",
	"#24",
	"#25",
	"#26",
	"#27",
	"#28",
	"TP",
	"#30",
	"#31",
	"#32",
	"#33",
	"#34",
	"#35",
	"#36",
	"#37",
	"#38",
	"#39",
	"#40",
	"IP6",
	"#42",
	"routing",
	"fragment",
	"#45",
	"#46",
	"#47",
	"#48",
	"#49",
	"ESP",
	"AH",
	"#52",
	"#53",
	"#54",
	"#55",
	"#56",
	"#57",
	"ICMP6",
	"no next header",
	"destination option",
	"#61",
	"mobility",
	"#63",
	"#64",
	"#65",
	"#66",
	"#67",
	"#68",
	"#69",
	"#70",
	"#71",
	"#72",
	"#73",
	"#74",
	"#75",
	"#76",
	"#77",
	"#78",
	"#79",
	"ISOIP",
	"#81",
	"#82",
	"#83",
	"#84",
	"#85",
	"#86",
	"#87",
	"#88",
	"OSPF",
	"#80",
	"#91",
	"#92",
	"#93",
	"#94",
	"#95",
	"#96",
	"Ethernet",
	"#98",
	"#99",
	"#100",
	"#101",
	"#102",
	"PIM",
	"#104",
	"#105",
	"#106",
	"#107",
	"#108",
	"#109",
	"#110",
	"#111",
	"#112",
	"#113",
	"#114",
	"#115",
	"#116",
	"#117",
	"#118",
	"#119",
	"#120",
	"#121",
	"#122",
	"#123",
	"#124",
	"#125",
	"#126",
	"#127",
	"#128",
	"#129",
	"#130",
	"#131",
	"#132",
	"#133",
	"#134",
	"#135",
	"#136",
	"#137",
	"#138",
	"#139",
	"#140",
	"#141",
	"#142",
	"#143",
	"#144",
	"#145",
	"#146",
	"#147",
	"#148",
	"#149",
	"#150",
	"#151",
	"#152",
	"#153",
	"#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",
};

static char *srcrule_str[] = {
	"first candidate",
	"same address",
	"appropriate scope",
	"deprecated address",
	"home address",
	"outgoing interface",
	"matching label",
	"public/temporary address",
	"alive interface",
	"preferred interface",
	"rule #10",
	"rule #11",
	"rule #12",
	"rule #13",
	"longest match",
	"rule #15",
};

/*
 * Dump IP6 statistics structure.
 */
void
ip6_stats(u_long off __unused, const char *name, int af1 __unused)
{
	struct ip6stat ip6stat;
	int first, i;
	int mib[4];
	size_t len;

	mib[0] = CTL_NET;
	mib[1] = PF_INET6;
	mib[2] = IPPROTO_IPV6;
	mib[3] = IPV6CTL_STATS;

	len = sizeof ip6stat;
	memset(&ip6stat, 0, len);
	if (sysctl(mib, 4, &ip6stat, &len, (void *)0, 0) < 0)
		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	p1a(f, m) if (ip6stat.f || sflag <= 1) \
    printf(m, (unsigned long long)ip6stat.f)

	p(ip6s_total, "\t%llu total packet%s received\n");
	p1a(ip6s_toosmall, "\t%llu with size smaller than minimum\n");
	p1a(ip6s_tooshort, "\t%llu with data size < data length\n");
	p1a(ip6s_badoptions, "\t%llu with bad options\n");
	p1a(ip6s_badvers, "\t%llu with incorrect version number\n");
	p(ip6s_fragments, "\t%llu fragment%s received\n");
	p(ip6s_fragdropped, "\t%llu fragment%s dropped (dup or out of space)\n");
	p(ip6s_fragtimeout, "\t%llu fragment%s dropped after timeout\n");
	p(ip6s_fragoverflow, "\t%llu fragment%s that exceeded limit\n");
	p(ip6s_reassembled, "\t%llu packet%s reassembled ok\n");
	p(ip6s_delivered, "\t%llu packet%s for this host\n");
	p(ip6s_forward, "\t%llu packet%s forwarded\n");
	p(ip6s_cantforward, "\t%llu packet%s not forwardable\n");
	p(ip6s_redirectsent, "\t%llu redirect%s sent\n");
	p(ip6s_localout, "\t%llu packet%s sent from this host\n");
	p(ip6s_rawout, "\t%llu packet%s sent with fabricated ip header\n");
	p(ip6s_odropped, "\t%llu output packet%s dropped due to no bufs, etc.\n");
	p(ip6s_noroute, "\t%llu output packet%s discarded due to no route\n");
	p(ip6s_fragmented, "\t%llu output datagram%s fragmented\n");
	p(ip6s_ofragments, "\t%llu fragment%s created\n");
	p(ip6s_cantfrag, "\t%llu datagram%s that can't be fragmented\n");
	p(ip6s_badscope, "\t%llu packet%s that violated scope rules\n");
	p(ip6s_notmember, "\t%llu multicast packet%s which we don't join\n");
	for (first = 1, i = 0; i < 256; i++)
		if (ip6stat.ip6s_nxthist[i] != 0) {
			if (first) {
				printf("\tInput histogram:\n");
				first = 0;
			}
			printf("\t\t%s: %llu\n", ip6nh[i],
			    (unsigned long long)ip6stat.ip6s_nxthist[i]);
		}
	printf("\tMbuf statistics:\n");
	printf("\t\t%llu one mbuf\n", (unsigned long long)ip6stat.ip6s_m1);
	for (first = 1, i = 0; i < 32; i++) {
		char ifbuf[IFNAMSIZ];
		if (ip6stat.ip6s_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.ip6s_m2m[i]);
		}
	}
	printf("\t\t%llu one ext mbuf\n",
	    (unsigned long long)ip6stat.ip6s_mext1);
	printf("\t\t%llu two or more ext mbuf\n",
	    (unsigned long long)ip6stat.ip6s_mext2m);
	p(ip6s_exthdrtoolong,
	    "\t%llu packet%s whose headers are not continuous\n");
	p(ip6s_nogif, "\t%llu tunneling packet%s that can't find gif\n");
	p(ip6s_toomanyhdr,
	    "\t%llu packet%s discarded because of 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(ip6s_sources_none,
	  "\t%llu failure%s of source address selection\n");
	for (first = 1, i = 0; i < 16; i++) {
		if (ip6stat.ip6s_sources_sameif[i]) {
			if (first) {
				printf("\tsource addresses on an outgoing I/F\n");
				first = 0;
			}
			PRINT_SCOPESTAT(ip6s_sources_sameif[i], i);
		}
	}
	for (first = 1, i = 0; i < 16; i++) {
		if (ip6stat.ip6s_sources_otherif[i]) {
			if (first) {
				printf("\tsource addresses on a non-outgoing I/F\n");
				first = 0;
			}
			PRINT_SCOPESTAT(ip6s_sources_otherif[i], i);
		}
	}
	for (first = 1, i = 0; i < 16; i++) {
		if (ip6stat.ip6s_sources_samescope[i]) {
			if (first) {
				printf("\tsource addresses of same scope\n");
				first = 0;
			}
			PRINT_SCOPESTAT(ip6s_sources_samescope[i], i);
		}
	}
	for (first = 1, i = 0; i < 16; i++) {
		if (ip6stat.ip6s_sources_otherscope[i]) {
			if (first) {
				printf("\tsource addresses of a different scope\n");
				first = 0;
			}
			PRINT_SCOPESTAT(ip6s_sources_otherscope[i], i);
		}
	}
	for (first = 1, i = 0; i < 16; i++) {
		if (ip6stat.ip6s_sources_deprecated[i]) {
			if (first) {
				printf("\tdeprecated source addresses\n");
				first = 0;
			}
			PRINT_SCOPESTAT(ip6s_sources_deprecated[i], i);
		}
	}

	p1a(ip6s_forward_cachehit, "\t%llu forward cache hit\n");
	p1a(ip6s_forward_cachemiss, "\t%llu forward cache miss\n");
	printf("\tSource addresses selection rule applied:\n");
	for (i = 0; i < 16; i++) {
		if (ip6stat.ip6s_sources_rule[i])
			printf("\t\t%llu %s\n", ip6stat.ip6s_sources_rule[i],
			       srcrule_str[i]);
	}
#undef p
#undef p1a
}

/*
 * Dump IPv6 per-interface statistics based on RFC 2465.
 */
void
ip6_ifstats(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;
	}

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

	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_protounknown, "\t%llu datagram%s with unknown proto received\n");
	p(ifs6_in_truncated, "\t%llu truncated datagram%s 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 reassembly\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[] = {
	"#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",
	"inverse neighbor solicitation",
	"inverse neighbor advertisement",
	"#143",
	"#144",
	"#145",
	"#146",
	"#147",
	"#148",
	"#149",
	"#150",
	"#151",
	"#152",
	"#153",
	"#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 ICMP6 statistics.
 */
void
icmp6_stats(u_long off __unused, const char *name, int af1 __unused)
{
	struct icmp6stat icmp6stat;
	int i, first;
	int mib[4];
	size_t len;

	mib[0] = CTL_NET;
	mib[1] = PF_INET6;
	mib[2] = IPPROTO_ICMPV6;
	mib[3] = ICMPV6CTL_STATS;

	len = sizeof icmp6stat;
	memset(&icmp6stat, 0, len);
	if (sysctl(mib, 4, &icmp6stat, &len, (void *)0, 0) < 0)
		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_5(f, m) printf(m, (unsigned long long)icmp6stat.f)

	p(icp6s_error, "\t%llu call%s to icmp6_error\n");
	p(icp6s_canterror,
	    "\t%llu error%s not generated in response to an icmp6 message\n");
	p(icp6s_toofreq,
	  "\t%llu error%s not generated because of rate limitation\n");
#define NELEM (int)(sizeof(icmp6stat.icp6s_outhist)/sizeof(icmp6stat.icp6s_outhist[0]))
	for (first = 1, i = 0; i < NELEM; i++)
		if (icmp6stat.icp6s_outhist[i] != 0) {
			if (first) {
				printf("\tOutput histogram:\n");
				first = 0;
			}
			printf("\t\t%s: %llu\n", icmp6names[i],
			    (unsigned long long)icmp6stat.icp6s_outhist[i]);
		}
#undef NELEM
	p(icp6s_badcode, "\t%llu message%s with bad code fields\n");
	p(icp6s_tooshort, "\t%llu message%s < minimum length\n");
	p(icp6s_checksum, "\t%llu bad checksum%s\n");
	p(icp6s_badlen, "\t%llu message%s with bad length\n");
#define NELEM (int)(sizeof(icmp6stat.icp6s_inhist)/sizeof(icmp6stat.icp6s_inhist[0]))
	for (first = 1, i = 0; i < NELEM; i++)
		if (icmp6stat.icp6s_inhist[i] != 0) {
			if (first) {
				printf("\tInput histogram:\n");
				first = 0;
			}
			printf("\t\t%s: %llu\n", icmp6names[i],
			    (unsigned long long)icmp6stat.icp6s_inhist[i]);
		}
#undef NELEM
	printf("\tHistogram of error messages to be generated:\n");
	p_5(icp6s_odst_unreach_noroute, "\t\t%llu no route\n");
	p_5(icp6s_odst_unreach_admin, "\t\t%llu administratively prohibited\n");
	p_5(icp6s_odst_unreach_beyondscope, "\t\t%llu beyond scope\n");
	p_5(icp6s_odst_unreach_addr, "\t\t%llu address unreachable\n");
	p_5(icp6s_odst_unreach_noport, "\t\t%llu port unreachable\n");
	p_5(icp6s_opacket_too_big, "\t\t%llu packet too big\n");
	p_5(icp6s_otime_exceed_transit, "\t\t%llu time exceed transit\n");
	p_5(icp6s_otime_exceed_reassembly, "\t\t%llu time exceed reassembly\n");
	p_5(icp6s_oparamprob_header, "\t\t%llu erroneous header field\n");
	p_5(icp6s_oparamprob_nextheader, "\t\t%llu unrecognized next header\n");
	p_5(icp6s_oparamprob_option, "\t\t%llu unrecognized option\n");
	p_5(icp6s_oredirect, "\t\t%llu redirect\n");
	p_5(icp6s_ounknown, "\t\t%llu unknown\n");

	p(icp6s_reflect, "\t%llu message response%s generated\n");
	p(icp6s_nd_toomanyopt, "\t%llu message%s with too many ND options\n");
	p(icp6s_nd_badopt, "\t%llu message%s with bad ND options\n");
	p(icp6s_badns, "\t%llu bad neighbor solicitation message%s\n");
	p(icp6s_badna, "\t%llu bad neighbor advertisement message%s\n");
	p(icp6s_badrs, "\t%llu bad router solicitation message%s\n");
	p(icp6s_badra, "\t%llu bad router advertisement message%s\n");
	p(icp6s_badredirect, "\t%llu bad redirect message%s\n");
	p(icp6s_pmtuchg, "\t%llu path MTU change%s\n");
#undef p
#undef p_5
}

/*
 * Dump ICMPv6 per-interface statistics based on RFC 2466.
 */
void
icmp6_ifstats(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))
#define	p2(f, m) if (ifr.ifr_ifru.ifru_icmp6stat.f || sflag <= 1) \
    printf(m, (unsigned long long)ifr.ifr_ifru.ifru_icmp6stat.f, pluralies(ifr.ifr_ifru.ifru_icmp6stat.f))

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

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

	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");
	p2(ifs6_in_echoreply, "\t%llu input echo repl%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");
	p2(ifs6_in_mldquery, "\t%llu input MLD quer%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");
	p2(ifs6_out_echoreply, "\t%llu output echo repl%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");
	p2(ifs6_out_mldquery, "\t%llu output MLD quer%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 __unused, const char *name, int af1 __unused)
{
	struct pim6stat pim6stat;

	if (off == 0)
		return;
	if (kread(off, (char *)&pim6stat, sizeof(pim6stat)))
		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(pim6s_rcv_total, "\t%llu message%s received\n");
	p(pim6s_rcv_tooshort, "\t%llu message%s received with too few bytes\n");
	p(pim6s_rcv_badsum, "\t%llu message%s received with bad checksum\n");
	p(pim6s_rcv_badversion, "\t%llu message%s received with bad version\n");
	p(pim6s_rcv_registers, "\t%llu register%s received\n");
	p(pim6s_rcv_badregisters, "\t%llu bad register%s received\n");
	p(pim6s_snd_registers, "\t%llu register%s sent\n");
#undef p
}

/*
 * Dump raw ip6 statistics structure.
 */
void
rip6_stats(u_long off __unused, const char *name, int af1 __unused)
{
	struct rip6stat rip6stat;
	u_quad_t delivered;
	int mib[4];
	size_t l;

	mib[0] = CTL_NET;
	mib[1] = PF_INET6;
	mib[2] = IPPROTO_IPV6;
	mib[3] = IPV6CTL_RIP6STATS;
	l = sizeof(rip6stat);
	if (sysctl(mib, 4, &rip6stat, &l, NULL, 0) < 0) {
		/* Just shut up if the kernel doesn't have ipv6. */
		if (errno != ENOENT)
			perror("Warning: sysctl(net.inet6.ip6.rip6stats)");
		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(rip6s_ipackets, "\t%llu message%s received\n");
	p(rip6s_isum, "\t%llu checksum calcuration%s on inbound\n");
	p(rip6s_badsum, "\t%llu message%s with bad checksum\n");
	p(rip6s_nosock, "\t%llu message%s dropped due to no socket\n");
	p(rip6s_nosockmcast,
	    "\t%llu multicast message%s dropped due to no socket\n");
	p(rip6s_fullsock,
	    "\t%llu message%s dropped due to full socket buffers\n");
	delivered = rip6stat.rip6s_ipackets -
		    rip6stat.rip6s_badsum -
		    rip6stat.rip6s_nosock -
		    rip6stat.rip6s_nosockmcast -
		    rip6stat.rip6s_fullsock;
	if (delivered || sflag <= 1)
		printf("\t%llu delivered\n", (unsigned long long)delivered);
	p(rip6s_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.
 */
#define GETSERVBYPORT6(port, proto, ret)\
{\
	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));\
};

void
inet6print(struct in6_addr *in6, int port, const char *proto, int numeric)
{
	struct servent *sp = 0;
	char line[80], *cp;
	int width;

	sprintf(line, "%.*s.", Wflag ? 39 :
		(Aflag && !numeric) ? 12 : 16, inet6name(in6));
	cp = index(line, '\0');
	if (!numeric && port)
		GETSERVBYPORT6(port, proto, sp);
	if (sp || port == 0)
		sprintf(cp, "%.8s", sp ? sp->s_name : "*");
	else
		sprintf(cp, "%d", ntohs((u_short)port));
	width = Wflag ? 45 : Aflag ? 18 : 22;
	printf("%-*.*s ", width, width, line);
}

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

char *
inet6name(struct in6_addr *in6p)
{
	char *cp;
	static char line[50];
	struct hostent *hp;
	static char domain[MAXHOSTNAMELEN];
	static int first = 1;

	if (first && !numeric_addr) {
		first = 0;
		if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
		    (cp = index(domain, '.')))
			(void) strcpy(domain, cp + 1);
		else
			domain[0] = 0;
	}
	cp = 0;
	if (!numeric_addr && !IN6_IS_ADDR_UNSPECIFIED(in6p)) {
		hp = gethostbyaddr((char *)in6p, sizeof(*in6p), AF_INET6);
		if (hp) {
			if ((cp = index(hp->h_name, '.')) &&
			    !strcmp(cp + 1, domain))
				*cp = 0;
			cp = hp->h_name;
		}
	}
	if (IN6_IS_ADDR_UNSPECIFIED(in6p))
		strcpy(line, "*");
	else if (cp)
		strcpy(line, cp);
	else
		sprintf(line, "%s",
			inet_ntop(AF_INET6, (void *)in6p, ntop_buf,
				sizeof(ntop_buf)));
	return (line);
}
#endif /*INET6*/