usr/src/cmd/cmd-inet/usr.bin/netstat/netstat.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright (c) 1990  Mentat Inc.
 * netstat.c 2.2, last change 9/9/91
 * MROUTING Revision 3.5
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*
 * simple netstat based on snmp/mib-2 interface to the TCP/IP stack
 *
 * NOTES:
 * 1. A comment "LINTED: (note 1)" appears before certain lines where
 *    lint would have complained, "pointer cast may result in improper
 *    alignment". These are lines where lint had suspected potential
 *    improper alignment of a data structure; in each such situation
 *    we have relied on the kernel guaranteeing proper alignment.
 * 2. Some 'for' loops have been commented as "'for' loop 1", etc
 *    because they have 'continue' or 'break' statements in their
 *    bodies. 'continue' statements have been used inside some loops
 *    where avoiding them would have led to deep levels of indentation.
 *
 * TODO:
 *	Add ability to request subsets from kernel (with level = MIB2_IP;
 *	name = 0 meaning everything for compatibility)
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <strings.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <kstat.h>
#include <assert.h>

#include <sys/types.h>
#include <sys/stream.h>
#include <stropts.h>
#include <sys/strstat.h>
#include <sys/tihdr.h>

#include <sys/socket.h>
#include <sys/sockio.h>
#include <netinet/in.h>
#include <net/if.h>
#include <net/route.h>

#include <inet/common.h>
#include <inet/mib2.h>
#include <inet/ip.h>
#include <inet/arp.h>
#include <inet/tcp.h>
#include <netinet/igmp_var.h>
#include <netinet/ip_mroute.h>

#include <arpa/inet.h>
#include <netdb.h>
#include <fcntl.h>
#include <sys/systeminfo.h>
#include <arpa/inet.h>

#include <netinet/dhcp.h>
#include <dhcpagent_ipc.h>
#include <dhcpagent_util.h>
#include <compat.h>

#include <libtsnet.h>
#include <tsol/label.h>

extern void	unixpr(kstat_ctl_t *kc);

#define	STR_EXPAND	4

#define	V4MASK_TO_V6(v4, v6)	((v6)._S6_un._S6_u32[0] = 0xfffffffful, \
				(v6)._S6_un._S6_u32[1] = 0xfffffffful, \
				(v6)._S6_un._S6_u32[2] = 0xfffffffful, \
				(v6)._S6_un._S6_u32[3] = (v4))

#define	IN6_IS_V4MASK(v6)	((v6)._S6_un._S6_u32[0] == 0xfffffffful && \
				(v6)._S6_un._S6_u32[1] == 0xfffffffful && \
				(v6)._S6_un._S6_u32[2] == 0xfffffffful)

typedef struct mib_item_s {
	struct mib_item_s	*next_item;
	int			group;
	int			mib_id;
	int			length;
	void			*valp;
} mib_item_t;

struct	ifstat {
	uint64_t	ipackets;
	uint64_t	ierrors;
	uint64_t	opackets;
	uint64_t	oerrors;
	uint64_t	collisions;
};

struct iflist {
	struct iflist	*next_if;
	char		ifname[LIFNAMSIZ];
	struct ifstat	tot;
};

static	mib_item_t	*mibget(int sd);
static	void		mibfree(mib_item_t *firstitem);
static	int		mibopen(void);
static void		mib_get_constants(mib_item_t *item);
static mib_item_t	*mib_item_dup(mib_item_t *item);
static mib_item_t	*mib_item_diff(mib_item_t *item1,
    mib_item_t *item2);
static void		mib_item_destroy(mib_item_t **item);

static boolean_t	octetstrmatch(const Octet_t *a, const Octet_t *b);
static char		*octetstr(const Octet_t *op, int code,
			    char *dst, uint_t dstlen);
static char		*pr_addr(uint_t addr,
			    char *dst, uint_t dstlen);
static char		*pr_addrnz(ipaddr_t addr, char *dst, uint_t dstlen);
static char		*pr_addr6(const in6_addr_t *addr,
			    char *dst, uint_t dstlen);
static char		*pr_mask(uint_t addr,
			    char *dst, uint_t dstlen);
static char		*pr_prefix6(const struct in6_addr *addr,
			    uint_t prefixlen, char *dst, uint_t dstlen);
static char		*pr_ap(uint_t addr, uint_t port,
			    char *proto, char *dst, uint_t dstlen);
static char		*pr_ap6(const in6_addr_t *addr, uint_t port,
			    char *proto, char *dst, uint_t dstlen);
static char		*pr_net(uint_t addr, uint_t mask,
			    char *dst, uint_t dstlen);
static char		*pr_netaddr(uint_t addr, uint_t mask,
			    char *dst, uint_t dstlen);
static char		*pr_netclassless(ipaddr_t addr, ipaddr_t mask,
			    char *dst, size_t dstlen);
static char		*fmodestr(uint_t fmode);
static char		*portname(uint_t port, char *proto,
			    char *dst, uint_t dstlen);

static const char	*mitcp_state(int code,
			    const mib2_transportMLPEntry_t *attr);
static const char	*miudp_state(int code,
			    const mib2_transportMLPEntry_t *attr);

static void		stat_report(mib_item_t *item);
static void		mrt_stat_report(mib_item_t *item);
static void		arp_report(mib_item_t *item);
static void		ndp_report(mib_item_t *item);
static void		mrt_report(mib_item_t *item);
static void		if_stat_total(struct ifstat *oldstats,
			    struct ifstat *newstats, struct ifstat *sumstats);
static void		if_report(mib_item_t *item, char *ifname,
			    int Iflag_only, boolean_t once_only);
static void		if_report_ip4(mib2_ipAddrEntry_t *ap,
			    char ifname[], char logintname[],
			    struct ifstat *statptr, boolean_t ksp_not_null);
static void		if_report_ip6(mib2_ipv6AddrEntry_t *ap6,
			    char ifname[], char logintname[],
			    struct ifstat *statptr, boolean_t ksp_not_null);
static void		ire_report(const mib_item_t *item);
static void		tcp_report(const mib_item_t *item);
static void		udp_report(const mib_item_t *item);
static void		group_report(mib_item_t *item);
static void		print_ip_stats(mib2_ip_t *ip);
static void		print_icmp_stats(mib2_icmp_t *icmp);
static void		print_ip6_stats(mib2_ipv6IfStatsEntry_t *ip6);
static void		print_icmp6_stats(mib2_ipv6IfIcmpEntry_t *icmp6);
static void		print_sctp_stats(mib2_sctp_t *tcp);
static void		print_tcp_stats(mib2_tcp_t *tcp);
static void		print_udp_stats(mib2_udp_t *udp);
static void		print_rawip_stats(mib2_rawip_t *rawip);
static void		print_igmp_stats(struct igmpstat *igps);
static void		print_mrt_stats(struct mrtstat *mrts);
static void		sctp_report(const mib_item_t *item);
static void		sum_ip6_stats(mib2_ipv6IfStatsEntry_t *ip6,
			    mib2_ipv6IfStatsEntry_t *sum6);
static void		sum_icmp6_stats(mib2_ipv6IfIcmpEntry_t *icmp6,
			    mib2_ipv6IfIcmpEntry_t *sum6);
static void		m_report(void);
static void		dhcp_report(char *);

	void		fail(int, char *, ...);
static	uint64_t	kstat_named_value(kstat_t *, char *);
static	kid_t		safe_kstat_read(kstat_ctl_t *, kstat_t *, void *);
static int		isnum(char *);
static char		*plural(int n);
static char		*pluraly(int n);
static char		*plurales(int n);
static void		process_filter(char *arg);
static boolean_t	family_selected(int family);

static void		usage(char *);
static void 		fatal(int errcode, char *str1, ...);

#define	PLURAL(n) plural((int)n)
#define	PLURALY(n) pluraly((int)n)
#define	PLURALES(n) plurales((int)n)
#define	IFLAGMOD(flg, val1, val2)	if (flg == val1) flg = val2
#define	MDIFF(diff, elem2, elem1, member)	(diff)->member = \
	(elem2)->member - (elem1)->member


static	boolean_t	Aflag = B_FALSE;	/* All sockets/ifs/rtng-tbls */
static	boolean_t	Dflag = B_FALSE;	/* Debug Info */
static	boolean_t	Iflag = B_FALSE;	/* IP Traffic Interfaces */
static	boolean_t	Mflag = B_FALSE;	/* STREAMS Memory Statistics */
static	boolean_t	Nflag = B_FALSE;	/* Numeric Network Addresses */
static	boolean_t	Rflag = B_FALSE;	/* Routing Tables */
static	boolean_t	RSECflag = B_FALSE;	/* Security attributes */
static	boolean_t	Sflag = B_FALSE;	/* Per-protocol Statistics */
static	boolean_t	Vflag = B_FALSE;	/* Verbose */
static	boolean_t	Pflag = B_FALSE;	/* Net to Media Tables */
static	boolean_t	Gflag = B_FALSE;	/* Multicast group membership */
static	boolean_t	MMflag = B_FALSE;	/* Multicast routing table */
static	boolean_t	DHCPflag = B_FALSE;	/* DHCP statistics */

static	int	v4compat = 0;	/* Compatible printing format for status */

static int	proto = IPPROTO_MAX;	/* all protocols */
kstat_ctl_t	*kc = NULL;

/*
 * Sizes of data structures extracted from the base mib.
 * This allows the size of the tables entries to grow while preserving
 * binary compatibility.
 */
static int ipAddrEntrySize;
static int ipRouteEntrySize;
static int ipNetToMediaEntrySize;
static int ipMemberEntrySize;
static int ipGroupSourceEntrySize;
static int ipRouteAttributeSize;
static int vifctlSize;
static int mfcctlSize;

static int ipv6IfStatsEntrySize;
static int ipv6IfIcmpEntrySize;
static int ipv6AddrEntrySize;
static int ipv6RouteEntrySize;
static int ipv6NetToMediaEntrySize;
static int ipv6MemberEntrySize;
static int ipv6GroupSourceEntrySize;

static int transportMLPSize;
static int tcpConnEntrySize;
static int tcp6ConnEntrySize;
static int udpEntrySize;
static int udp6EntrySize;
static int sctpEntrySize;
static int sctpLocalEntrySize;
static int sctpRemoteEntrySize;

#define	protocol_selected(p)	(proto == IPPROTO_MAX || proto == (p))

/* Machinery used for -f (filter) option */
#define	FK_AF		0
#define	FK_INIF		1
#define	FK_OUTIF	2
#define	FK_SRC		3
#define	FK_DST		4
#define	FK_FLAGS	5
#define	NFILTERKEYS	6

static const char *filter_keys[NFILTERKEYS] = {
	"af", "inif", "outif", "src", "dst", "flags"
};

/* Flags on routes */
#define	FLF_A		0x00000001
#define	FLF_B		0x00000002
#define	FLF_D		0x00000004
#define	FLF_G		0x00000008
#define	FLF_H		0x00000010
#define	FLF_L		0x00000020
#define	FLF_U		0x00000040
#define	FLF_M		0x00000080
#define	FLF_S		0x00000100
static const char flag_list[] = "ABDGHLUMS";

typedef struct filter_rule filter_t;

struct filter_rule {
	filter_t *f_next;
	union {
		int f_family;
		const char *f_ifname;
		struct {
			struct hostent *f_address;
			in6_addr_t f_mask;
		} a;
		struct {
			uint_t f_flagset;
			uint_t f_flagclear;
		} f;
	} u;
};

/*
 * The user-specified filters are linked into lists separated by
 * keyword (type of filter).  Thus, the matching algorithm is:
 *	For each non-empty filter list
 *		If no filters in the list match
 *			then stop here; route doesn't match
 *	If loop above completes, then route does match and will be
 *	displayed.
 */
static filter_t *filters[NFILTERKEYS];

int
main(int argc, char **argv)
{
	char		*name;
	mib_item_t	*item = NULL;
	mib_item_t	*previtem = NULL;
	int		sd = -1;
	char	*ifname = NULL;
	int	interval = 0;	/* Single time by default */
	int	count = -1;	/* Forever */
	int	c;
	int	d;
	/*
	 * Possible values of 'Iflag_only':
	 * -1, no feature-flags;
	 *  0, IFlag and other feature-flags enabled
	 *  1, IFlag is the only feature-flag enabled
	 * : trinary variable, modified using IFLAGMOD()
	 */
	int Iflag_only = -1;
	boolean_t once_only = B_FALSE; /* '-i' with count > 1 */
	extern char	*optarg;
	extern int	optind;
	char *default_ip_str = NULL;

	name = argv[0];

	v4compat = get_compat_flag(&default_ip_str);
	if (v4compat == DEFAULT_PROT_BAD_VALUE)
		fatal(2, "%s: %s: Bad value for %s in %s\n", name,
		    default_ip_str, DEFAULT_IP, INET_DEFAULT_FILE);
	free(default_ip_str);

	while ((c = getopt(argc, argv, "adimnrspMgvf:P:I:DR")) != -1) {
		switch ((char)c) {
		case 'a':		/* all connections */
			Aflag = B_TRUE;
			break;

		case 'd':		/* turn on debugging */
			Dflag = B_TRUE;
			break;

		case 'i':		/* interface (ill/ipif report) */
			Iflag = B_TRUE;
			IFLAGMOD(Iflag_only, -1, 1); /* '-i' exists */
			break;

		case 'm':		/* streams msg report */
			Mflag = B_TRUE;
			IFLAGMOD(Iflag_only, 1, 0); /* see macro def'n */
			break;

		case 'n':		/* numeric format */
			Nflag = B_TRUE;
			break;

		case 'r':		/* route tables */
			Rflag = B_TRUE;
			IFLAGMOD(Iflag_only, 1, 0); /* see macro def'n */
			break;

		case 'R':		/* security attributes */
			RSECflag = B_TRUE;
			IFLAGMOD(Iflag_only, 1, 0); /* see macro def'n */
			break;

		case 's':		/* per-protocol statistics */
			Sflag = B_TRUE;
			IFLAGMOD(Iflag_only, 1, 0); /* see macro def'n */
			break;

		case 'p':		/* arp/ndp table */
			Pflag = B_TRUE;
			IFLAGMOD(Iflag_only, 1, 0); /* see macro def'n */
			break;

		case 'M':		/* multicast routing tables */
			MMflag = B_TRUE;
			IFLAGMOD(Iflag_only, 1, 0); /* see macro def'n */
			break;

		case 'g':		/* multicast group membership */
			Gflag = B_TRUE;
			IFLAGMOD(Iflag_only, 1, 0); /* see macro def'n */
			break;

		case 'v':		/* verbose output format */
			Vflag = B_TRUE;
			IFLAGMOD(Iflag_only, 1, 0); /* see macro def'n */
			break;

		case 'f':
			process_filter(optarg);
			break;

		case 'P':
			if (strcmp(optarg, "ip") == 0) {
				proto = IPPROTO_IP;
			} else if (strcmp(optarg, "ipv6") == 0 ||
			    strcmp(optarg, "ip6") == 0) {
				v4compat = 0;	/* Overridden */
				proto = IPPROTO_IPV6;
			} else if (strcmp(optarg, "icmp") == 0) {
				proto = IPPROTO_ICMP;
			} else if (strcmp(optarg, "icmpv6") == 0 ||
			    strcmp(optarg, "icmp6") == 0) {
				v4compat = 0;	/* Overridden */
				proto = IPPROTO_ICMPV6;
			} else if (strcmp(optarg, "igmp") == 0) {
				proto = IPPROTO_IGMP;
			} else if (strcmp(optarg, "udp") == 0) {
				proto = IPPROTO_UDP;
			} else if (strcmp(optarg, "tcp") == 0) {
				proto = IPPROTO_TCP;
			} else if (strcmp(optarg, "sctp") == 0) {
				proto = IPPROTO_SCTP;
			} else if (strcmp(optarg, "raw") == 0 ||
			    strcmp(optarg, "rawip") == 0) {
				proto = IPPROTO_RAW;
			} else {
				fatal(1, "%s: unknown protocol.\n", optarg);
			}
			break;

		case 'I':
			ifname = optarg;
			Iflag = B_TRUE;
			IFLAGMOD(Iflag_only, -1, 1); /* see macro def'n */
			break;

		case 'D':
			DHCPflag = B_TRUE;
			Iflag_only = 0;
			break;

		case '?':
		default:
			usage(name);
		}
	}

	/*
	 * Make sure -R option is set only on a labeled system.
	 */
	if (RSECflag && !is_system_labeled()) {
		(void) fprintf(stderr, "-R set but labeling is not enabled\n");
		usage(name);
	}

	/*
	 * Handle other arguments: find interval, count; the
	 * flags that accept 'interval' and 'count' are OR'd
	 * in the outermost 'if'; more flags may be added as
	 * required
	 */
	if (Iflag || Sflag || Mflag) {
		for (d = optind; d < argc; d++) {
			if (isnum(argv[d])) {
				interval = atoi(argv[d]);
				if (d + 1 < argc &&
				    isnum(argv[d + 1])) {
					count = atoi(argv[d + 1]);
					optind++;
				}
				optind++;
				if (interval == 0 || count == 0)
					usage(name);
				break;
			}
		}
	}
	if (optind < argc) {
		if (Iflag && isnum(argv[optind])) {
			count = atoi(argv[optind]);
			if (count == 0)
				usage(name);
			optind++;
		}
	}
	if (optind < argc) {
		(void) fprintf(stderr,
		    "%s: extra arguments\n", name);
		usage(name);
	}
	if (interval)
		setbuf(stdout, NULL);

	if (DHCPflag) {
		dhcp_report(Iflag ? ifname : NULL);
		exit(0);
	}

	/* Get data structures: priming before iteration */
	if (family_selected(AF_INET) || family_selected(AF_INET6)) {
		sd = mibopen();
		if (sd == -1)
			fatal(1, "can't open mib stream\n");
		if ((item = mibget(sd)) == NULL) {
			(void) close(sd);
			fatal(1, "mibget() failed\n");
		}
		/* Extract constant sizes - need do once only */
		mib_get_constants(item);
	}
	if ((kc = kstat_open()) == NULL) {
		mibfree(item);
		(void) close(sd);
		fail(1, "kstat_open(): can't open /dev/kstat");
	}

	if (interval <= 0) {
		count = 1;
		once_only = B_TRUE;
	}
	/* 'for' loop 1: */
	for (;;) {
		mib_item_t *curritem = NULL; /* only for -[M]s */

		/* netstat: AF_INET[6] behaviour */
		if (family_selected(AF_INET) || family_selected(AF_INET6)) {
			if (Sflag) {
				curritem = mib_item_diff(previtem, item);
				if (curritem == NULL)
					fatal(1, "can't process mib data, "
					    "out of memory\n");
				mib_item_destroy(&previtem);
			}

			if (!(Iflag || Rflag || Sflag || Mflag ||
			    MMflag || Pflag || Gflag || DHCPflag)) {
				if (protocol_selected(IPPROTO_UDP))
					udp_report(item);
				if (protocol_selected(IPPROTO_TCP))
					tcp_report(item);
				if (protocol_selected(IPPROTO_SCTP))
					sctp_report(item);
			}
			if (Iflag)
				if_report(item, ifname, Iflag_only, once_only);
			if (Mflag)
				m_report();
			if (Rflag)
				ire_report(item);
			if (Sflag && MMflag) {
				mrt_stat_report(curritem);
			} else {
				if (Sflag)
					stat_report(curritem);
				if (MMflag)
					mrt_report(item);
			}
			if (Gflag)
				group_report(item);
			if (Pflag) {
				if (family_selected(AF_INET))
					arp_report(item);
				if (family_selected(AF_INET6))
					ndp_report(item);
			}
			mib_item_destroy(&curritem);
		}

		/* netstat: AF_UNIX behaviour */
		if (family_selected(AF_UNIX) &&
		    (!(Iflag || Rflag || Sflag || Mflag ||
		    MMflag || Pflag || Gflag)))
			unixpr(kc);
		(void) kstat_close(kc);

		/* iteration handling code */
		if (count > 0 && --count == 0)
			break;
		(void) sleep(interval);

		/* re-populating of data structures */
		if (family_selected(AF_INET) || family_selected(AF_INET6)) {
			if (Sflag) {
				/* previtem is a cut-down list */
				previtem = mib_item_dup(item);
				if (previtem == NULL)
					fatal(1, "can't process mib data, "
					    "out of memory\n");
			}
			mibfree(item);
			(void) close(sd);
			if ((sd = mibopen()) == -1)
				fatal(1, "can't open mib stream anymore\n");
			if ((item = mibget(sd)) == NULL) {
				(void) close(sd);
				fatal(1, "mibget() failed\n");
			}
		}
		if ((kc = kstat_open()) == NULL)
			fail(1, "kstat_open(): can't open /dev/kstat");

	} /* 'for' loop 1 ends */
	mibfree(item);
	(void) close(sd);

	return (0);
}


static int
isnum(char *p)
{
	int	len;
	int	i;

	len = strlen(p);
	for (i = 0; i < len; i++)
		if (!isdigit(p[i]))
			return (0);
	return (1);
}


/* --------------------------------- MIBGET -------------------------------- */

static mib_item_t *
mibget(int sd)
{
	/*
	 * buf is an automatic for this function, so the
	 * compiler has complete control over its alignment;
	 * it is assumed this alignment is satisfactory for
	 * it to be casted to certain other struct pointers
	 * here, such as struct T_optmgmt_ack * .
	 */
	uintptr_t		buf[512 / sizeof (uintptr_t)];
	int			flags;
	int			i, j, getcode;
	struct strbuf		ctlbuf, databuf;
	struct T_optmgmt_req	*tor = (struct T_optmgmt_req *)buf;
	struct T_optmgmt_ack	*toa = (struct T_optmgmt_ack *)buf;
	struct T_error_ack	*tea = (struct T_error_ack *)buf;
	struct opthdr		*req;
	mib_item_t		*first_item = NULL;
	mib_item_t		*last_item  = NULL;
	mib_item_t		*temp;

	tor->PRIM_type = T_SVR4_OPTMGMT_REQ;
	tor->OPT_offset = sizeof (struct T_optmgmt_req);
	tor->OPT_length = sizeof (struct opthdr);
	tor->MGMT_flags = T_CURRENT;
	req = (struct opthdr *)&tor[1];
	req->level = MIB2_IP;		/* any MIB2_xxx value ok here */
	req->name  = 0;
	req->len   = 0;

	ctlbuf.buf = (char *)buf;
	ctlbuf.len = tor->OPT_length + tor->OPT_offset;
	flags = 0;
	if (putmsg(sd, &ctlbuf, (struct strbuf *)0, flags) == -1) {
		perror("mibget: putmsg(ctl) failed");
		goto error_exit;
	}

	/*
	 * Each reply consists of a ctl part for one fixed structure
	 * or table, as defined in mib2.h.  The format is a T_OPTMGMT_ACK,
	 * containing an opthdr structure.  level/name identify the entry,
	 * len is the size of the data part of the message.
	 */
	req = (struct opthdr *)&toa[1];
	ctlbuf.maxlen = sizeof (buf);
	j = 1;
	for (;;) {
		flags = 0;
		getcode = getmsg(sd, &ctlbuf, (struct strbuf *)0, &flags);
		if (getcode == -1) {
			perror("mibget getmsg(ctl) failed");
			if (Dflag) {
				(void) fputs("#   level   name    len\n",
				    stderr);
				i = 0;
				for (last_item = first_item; last_item;
					last_item = last_item->next_item)
					(void) printf("%d  %4d   %5d   %d\n",
					    ++i,
					    last_item->group,
					    last_item->mib_id,
					    last_item->length);
			}
			goto error_exit;
		}
		if (getcode == 0 &&
		    ctlbuf.len >= sizeof (struct T_optmgmt_ack) &&
		    toa->PRIM_type == T_OPTMGMT_ACK &&
		    toa->MGMT_flags == T_SUCCESS &&
		    req->len == 0) {
			if (Dflag)
				(void) printf("mibget getmsg() %d returned "
				    "EOD (level %ld, name %ld)\n",
				    j, req->level, req->name);
			return (first_item);		/* this is EOD msg */
		}

		if (ctlbuf.len >= sizeof (struct T_error_ack) &&
		    tea->PRIM_type == T_ERROR_ACK) {
			(void) fprintf(stderr,
			    "mibget %d gives T_ERROR_ACK: TLI_error = 0x%lx, "
			    "UNIX_error = 0x%lx\n",
			    j, tea->TLI_error, tea->UNIX_error);

			errno = (tea->TLI_error == TSYSERR) ?
			    tea->UNIX_error : EPROTO;
			goto error_exit;
		}

		if (getcode != MOREDATA ||
		    ctlbuf.len < sizeof (struct T_optmgmt_ack) ||
		    toa->PRIM_type != T_OPTMGMT_ACK ||
		    toa->MGMT_flags != T_SUCCESS) {
			(void) printf("mibget getmsg(ctl) %d returned %d, "
			    "ctlbuf.len = %d, PRIM_type = %ld\n",
			    j, getcode, ctlbuf.len, toa->PRIM_type);

			if (toa->PRIM_type == T_OPTMGMT_ACK)
				(void) printf("T_OPTMGMT_ACK: "
				    "MGMT_flags = 0x%lx, req->len = %ld\n",
				    toa->MGMT_flags, req->len);
			errno = ENOMSG;
			goto error_exit;
		}

		temp = (mib_item_t *)malloc(sizeof (mib_item_t));
		if (temp == NULL) {
			perror("mibget malloc failed");
			goto error_exit;
		}
		if (last_item != NULL)
			last_item->next_item = temp;
		else
			first_item = temp;
		last_item = temp;
		last_item->next_item = NULL;
		last_item->group = req->level;
		last_item->mib_id = req->name;
		last_item->length = req->len;
		last_item->valp = malloc((int)req->len);
		if (last_item->valp == NULL)
			goto error_exit;
		if (Dflag)
			(void) printf("msg %d: group = %4d   mib_id = %5d"
			    "length = %d\n",
			    j, last_item->group, last_item->mib_id,
			    last_item->length);

		databuf.maxlen = last_item->length;
		databuf.buf    = (char *)last_item->valp;
		databuf.len    = 0;
		flags = 0;
		getcode = getmsg(sd, (struct strbuf *)0, &databuf, &flags);
		if (getcode == -1) {
			perror("mibget getmsg(data) failed");
			goto error_exit;
		} else if (getcode != 0) {
			(void) printf("mibget getmsg(data) returned %d, "
			    "databuf.maxlen = %d, databuf.len = %d\n",
			    getcode, databuf.maxlen, databuf.len);
			goto error_exit;
		}
		j++;
	}
	/* NOTREACHED */

error_exit:;
	mibfree(first_item);
	return (NULL);
}

/*
 * mibfree: frees a linked list of type (mib_item_t *)
 * returned by mibget(); this is NOT THE SAME AS
 * mib_item_destroy(), so should be used for objects
 * returned by mibget() only
 */
static void
mibfree(mib_item_t *firstitem)
{
	mib_item_t *lastitem;

	while (firstitem != NULL) {
		lastitem = firstitem;
		firstitem = firstitem->next_item;
		if (lastitem->valp != NULL)
			free(lastitem->valp);
		free(lastitem);
	}
}

static int
mibopen(void)
{
	int	sd;

	sd = open("/dev/arp", O_RDWR);
	if (sd == -1) {
		perror("arp open");
		return (-1);
	}
	if (ioctl(sd, I_PUSH, "tcp") == -1) {
		perror("tcp I_PUSH");
		(void) close(sd);
		return (-1);
	}
	if (ioctl(sd, I_PUSH, "udp") == -1) {
		perror("udp I_PUSH");
		(void) close(sd);
		return (-1);
	}
	if (ioctl(sd, I_PUSH, "icmp") == -1) {
		perror("icmp I_PUSH");
		(void) close(sd);
		return (-1);
	}
	return (sd);
}

/*
 * mib_item_dup: returns a clean mib_item_t * linked
 * list, so that for every element item->mib_id is 0;
 * to deallocate this linked list, use mib_item_destroy
 */
static mib_item_t *
mib_item_dup(mib_item_t *item)
{
	int	c = 0;
	mib_item_t *localp;
	mib_item_t *tempp;

	for (tempp = item; tempp; tempp = tempp->next_item)
		if (tempp->mib_id == 0)
			c++;
	tempp = NULL;

	localp = (mib_item_t *)malloc(c * sizeof (mib_item_t));
	if (localp == NULL)
		return (NULL);
	c = 0;
	for (; item; item = item->next_item) {
		if (item->mib_id == 0) {
			/* Replicate item in localp */
			(localp[c]).next_item = NULL;
			(localp[c]).group = item->group;
			(localp[c]).mib_id = item->mib_id;
			(localp[c]).length = item->length;
			(localp[c]).valp = (uintptr_t *)malloc(
			    item->length);
			if ((localp[c]).valp == NULL) {
				mib_item_destroy(&localp);
				return (NULL);
			}
			(void *) memcpy((localp[c]).valp,
			    item->valp,
			    item->length);
			tempp = &(localp[c]);
			if (c > 0)
				(localp[c - 1]).next_item = tempp;
			c++;
		}
	}
	return (localp);
}

/*
 * mib_item_diff: takes two (mib_item_t *) linked lists
 * item1 and item2 and computes the difference between
 * differentiable values in item2 against item1 for every
 * given member of item2; returns an mib_item_t * linked
 * list of diff's, or a copy of item2 if item1 is NULL;
 * will return NULL if system out of memory; works only
 * for item->mib_id == 0
 */
static mib_item_t *
mib_item_diff(mib_item_t *item1, mib_item_t *item2) {
	int	nitems	= 0; /* no. of items in item2 */
	mib_item_t *tempp2;  /* walking copy of item2 */
	mib_item_t *tempp1;  /* walking copy of item1 */
	mib_item_t *diffp;
	mib_item_t *diffptr; /* walking copy of diffp */
	mib_item_t *prevp = NULL;

	if (item1 == NULL) {
		diffp = mib_item_dup(item2);
		return (diffp);
	}

	for (tempp2 = item2;
	    tempp2;
	    tempp2 = tempp2->next_item) {
		if (tempp2->mib_id == 0)
			switch (tempp2->group) {
			/*
			 * upon adding a case here, the same
			 * must also be added in the next
			 * switch statement, alongwith
			 * appropriate code
			 */
			case MIB2_IP:
			case MIB2_IP6:
			case EXPER_DVMRP:
			case EXPER_IGMP:
			case MIB2_ICMP:
			case MIB2_ICMP6:
			case MIB2_TCP:
			case MIB2_UDP:
			case MIB2_SCTP:
			case EXPER_RAWIP:
				nitems++;
			}
	}
	tempp2 = NULL;
	if (nitems == 0) {
		diffp = mib_item_dup(item2);
		return (diffp);
	}

	diffp = (mib_item_t *)calloc(nitems, sizeof (mib_item_t));
	if (diffp == NULL)
		return (NULL);
	diffptr = diffp;
	/* 'for' loop 1: */
	for (tempp2 = item2; tempp2 != NULL; tempp2 = tempp2->next_item) {
		if (tempp2->mib_id != 0)
			continue; /* 'for' loop 1 */
		/* 'for' loop 2: */
		for (tempp1 = item1; tempp1 != NULL;
		    tempp1 = tempp1->next_item) {
			if (!(tempp1->mib_id == 0 &&
			    tempp1->group == tempp2->group &&
			    tempp1->mib_id == tempp2->mib_id))
				continue; /* 'for' loop 2 */
			/* found comparable data sets */
			if (prevp != NULL)
				prevp->next_item = diffptr;
			switch (tempp2->group) {
			/*
			 * Indenting note: Because of long variable names
			 * in cases MIB2_IP6 and MIB2_ICMP6, their contents
			 * have been indented by one tab space only
			 */
			case MIB2_IP: {
				mib2_ip_t *i2 = (mib2_ip_t *)tempp2->valp;
				mib2_ip_t *i1 = (mib2_ip_t *)tempp1->valp;
				mib2_ip_t *d;

				diffptr->group = tempp2->group;
				diffptr->mib_id = tempp2->mib_id;
				diffptr->length = tempp2->length;
				d = (mib2_ip_t *)calloc(tempp2->length, 1);
				if (d == NULL)
					goto mibdiff_out_of_memory;
				diffptr->valp = d;
				d->ipForwarding = i2->ipForwarding;
				d->ipDefaultTTL = i2->ipDefaultTTL;
				MDIFF(d, i2, i1, ipInReceives);
				MDIFF(d, i2, i1, ipInHdrErrors);
				MDIFF(d, i2, i1, ipInAddrErrors);
				MDIFF(d, i2, i1, ipInCksumErrs);
				MDIFF(d, i2, i1, ipForwDatagrams);
				MDIFF(d, i2, i1, ipForwProhibits);
				MDIFF(d, i2, i1, ipInUnknownProtos);
				MDIFF(d, i2, i1, ipInDiscards);
				MDIFF(d, i2, i1, ipInDelivers);
				MDIFF(d, i2, i1, ipOutRequests);
				MDIFF(d, i2, i1, ipOutDiscards);
				MDIFF(d, i2, i1, ipOutNoRoutes);
				MDIFF(d, i2, i1, ipReasmTimeout);
				MDIFF(d, i2, i1, ipReasmReqds);
				MDIFF(d, i2, i1, ipReasmOKs);
				MDIFF(d, i2, i1, ipReasmFails);
				MDIFF(d, i2, i1, ipReasmDuplicates);
				MDIFF(d, i2, i1, ipReasmPartDups);
				MDIFF(d, i2, i1, ipFragOKs);
				MDIFF(d, i2, i1, ipFragFails);
				MDIFF(d, i2, i1, ipFragCreates);
				MDIFF(d, i2, i1, ipRoutingDiscards);
				MDIFF(d, i2, i1, tcpInErrs);
				MDIFF(d, i2, i1, udpNoPorts);
				MDIFF(d, i2, i1, udpInCksumErrs);
				MDIFF(d, i2, i1, udpInOverflows);
				MDIFF(d, i2, i1, rawipInOverflows);
				MDIFF(d, i2, i1, ipsecInSucceeded);
				MDIFF(d, i2, i1, ipsecInFailed);
				MDIFF(d, i2, i1, ipInIPv6);
				MDIFF(d, i2, i1, ipOutIPv6);
				MDIFF(d, i2, i1, ipOutSwitchIPv6);
				prevp = diffptr++;
				break;
			}
			case MIB2_IP6: {
			mib2_ipv6IfStatsEntry_t *i2;
			mib2_ipv6IfStatsEntry_t *i1;
			mib2_ipv6IfStatsEntry_t *d;

			i2 = (mib2_ipv6IfStatsEntry_t *)tempp2->valp;
			i1 = (mib2_ipv6IfStatsEntry_t *)tempp1->valp;
			diffptr->group = tempp2->group;
			diffptr->mib_id = tempp2->mib_id;
			diffptr->length = tempp2->length;
			d = (mib2_ipv6IfStatsEntry_t *)calloc(
			    tempp2->length, 1);
			if (d == NULL)
				goto mibdiff_out_of_memory;
			diffptr->valp = d;
			d->ipv6Forwarding = i2->ipv6Forwarding;
			d->ipv6DefaultHopLimit =
			    i2->ipv6DefaultHopLimit;

			MDIFF(d, i2, i1, ipv6InReceives);
			MDIFF(d, i2, i1, ipv6InHdrErrors);
			MDIFF(d, i2, i1, ipv6InTooBigErrors);
			MDIFF(d, i2, i1, ipv6InNoRoutes);
			MDIFF(d, i2, i1, ipv6InAddrErrors);
			MDIFF(d, i2, i1, ipv6InUnknownProtos);
			MDIFF(d, i2, i1, ipv6InTruncatedPkts);
			MDIFF(d, i2, i1, ipv6InDiscards);
			MDIFF(d, i2, i1, ipv6InDelivers);
			MDIFF(d, i2, i1, ipv6OutForwDatagrams);
			MDIFF(d, i2, i1, ipv6OutRequests);
			MDIFF(d, i2, i1, ipv6OutDiscards);
			MDIFF(d, i2, i1, ipv6OutNoRoutes);
			MDIFF(d, i2, i1, ipv6OutFragOKs);
			MDIFF(d, i2, i1, ipv6OutFragFails);
			MDIFF(d, i2, i1, ipv6OutFragCreates);
			MDIFF(d, i2, i1, ipv6ReasmReqds);
			MDIFF(d, i2, i1, ipv6ReasmOKs);
			MDIFF(d, i2, i1, ipv6ReasmFails);
			MDIFF(d, i2, i1, ipv6InMcastPkts);
			MDIFF(d, i2, i1, ipv6OutMcastPkts);
			MDIFF(d, i2, i1, ipv6ReasmDuplicates);
			MDIFF(d, i2, i1, ipv6ReasmPartDups);
			MDIFF(d, i2, i1, ipv6ForwProhibits);
			MDIFF(d, i2, i1, udpInCksumErrs);
			MDIFF(d, i2, i1, udpInOverflows);
			MDIFF(d, i2, i1, rawipInOverflows);
			MDIFF(d, i2, i1, ipv6InIPv4);
			MDIFF(d, i2, i1, ipv6OutIPv4);
			MDIFF(d, i2, i1, ipv6OutSwitchIPv4);
			prevp = diffptr++;
			break;
			}
			case EXPER_DVMRP: {
				struct mrtstat *m2;
				struct mrtstat *m1;
				struct mrtstat *d;

				m2 = (struct mrtstat *)tempp2->valp;
				m1 = (struct mrtstat *)tempp1->valp;
				diffptr->group = tempp2->group;
				diffptr->mib_id = tempp2->mib_id;
				diffptr->length = tempp2->length;
				d = (struct mrtstat *)calloc(tempp2->length, 1);
				if (d == NULL)
					goto mibdiff_out_of_memory;
				diffptr->valp = d;
				MDIFF(d, m2, m1, mrts_mfc_hits);
				MDIFF(d, m2, m1, mrts_mfc_misses);
				MDIFF(d, m2, m1, mrts_fwd_in);
				MDIFF(d, m2, m1, mrts_fwd_out);
				d->mrts_upcalls = m2->mrts_upcalls;
				MDIFF(d, m2, m1, mrts_fwd_drop);
				MDIFF(d, m2, m1, mrts_bad_tunnel);
				MDIFF(d, m2, m1, mrts_cant_tunnel);
				MDIFF(d, m2, m1, mrts_wrong_if);
				MDIFF(d, m2, m1, mrts_upq_ovflw);
				MDIFF(d, m2, m1, mrts_cache_cleanups);
				MDIFF(d, m2, m1, mrts_drop_sel);
				MDIFF(d, m2, m1, mrts_q_overflow);
				MDIFF(d, m2, m1, mrts_pkt2large);
				MDIFF(d, m2, m1, mrts_pim_badversion);
				MDIFF(d, m2, m1, mrts_pim_rcv_badcsum);
				MDIFF(d, m2, m1, mrts_pim_badregisters);
				MDIFF(d, m2, m1, mrts_pim_regforwards);
				MDIFF(d, m2, m1, mrts_pim_regsend_drops);
				MDIFF(d, m2, m1, mrts_pim_malformed);
				MDIFF(d, m2, m1, mrts_pim_nomemory);
				prevp = diffptr++;
				break;
			}
			case EXPER_IGMP: {
				struct igmpstat *i2;
				struct igmpstat *i1;
				struct igmpstat *d;

				i2 = (struct igmpstat *)tempp2->valp;
				i1 = (struct igmpstat *)tempp1->valp;
				diffptr->group = tempp2->group;
				diffptr->mib_id = tempp2->mib_id;
				diffptr->length = tempp2->length;
				d = (struct igmpstat *)calloc(
				    tempp2->length, 1);
				if (d == NULL)
					goto mibdiff_out_of_memory;
				diffptr->valp = d;
				MDIFF(d, i2, i1, igps_rcv_total);
				MDIFF(d, i2, i1, igps_rcv_tooshort);
				MDIFF(d, i2, i1, igps_rcv_badsum);
				MDIFF(d, i2, i1, igps_rcv_queries);
				MDIFF(d, i2, i1, igps_rcv_badqueries);
				MDIFF(d, i2, i1, igps_rcv_reports);
				MDIFF(d, i2, i1, igps_rcv_badreports);
				MDIFF(d, i2, i1, igps_rcv_ourreports);
				MDIFF(d, i2, i1, igps_snd_reports);
				prevp = diffptr++;
				break;
			}
			case MIB2_ICMP: {
				mib2_icmp_t *i2;
				mib2_icmp_t *i1;
				mib2_icmp_t *d;

				i2 = (mib2_icmp_t *)tempp2->valp;
				i1 = (mib2_icmp_t *)tempp1->valp;
				diffptr->group = tempp2->group;
				diffptr->mib_id = tempp2->mib_id;
				diffptr->length = tempp2->length;
				d = (mib2_icmp_t *)calloc(tempp2->length, 1);
				if (d == NULL)
					goto mibdiff_out_of_memory;
				diffptr->valp = d;
				MDIFF(d, i2, i1, icmpInMsgs);
				MDIFF(d, i2, i1, icmpInErrors);
				MDIFF(d, i2, i1, icmpInCksumErrs);
				MDIFF(d, i2, i1, icmpInUnknowns);
				MDIFF(d, i2, i1, icmpInDestUnreachs);
				MDIFF(d, i2, i1, icmpInTimeExcds);
				MDIFF(d, i2, i1, icmpInParmProbs);
				MDIFF(d, i2, i1, icmpInSrcQuenchs);
				MDIFF(d, i2, i1, icmpInRedirects);
				MDIFF(d, i2, i1, icmpInBadRedirects);
				MDIFF(d, i2, i1, icmpInEchos);
				MDIFF(d, i2, i1, icmpInEchoReps);
				MDIFF(d, i2, i1, icmpInTimestamps);
				MDIFF(d, i2, i1, icmpInAddrMasks);
				MDIFF(d, i2, i1, icmpInAddrMaskReps);
				MDIFF(d, i2, i1, icmpInFragNeeded);
				MDIFF(d, i2, i1, icmpOutMsgs);
				MDIFF(d, i2, i1, icmpOutDrops);
				MDIFF(d, i2, i1, icmpOutErrors);
				MDIFF(d, i2, i1, icmpOutDestUnreachs);
				MDIFF(d, i2, i1, icmpOutTimeExcds);
				MDIFF(d, i2, i1, icmpOutParmProbs);
				MDIFF(d, i2, i1, icmpOutSrcQuenchs);
				MDIFF(d, i2, i1, icmpOutRedirects);
				MDIFF(d, i2, i1, icmpOutEchos);
				MDIFF(d, i2, i1, icmpOutEchoReps);
				MDIFF(d, i2, i1, icmpOutTimestamps);
				MDIFF(d, i2, i1, icmpOutTimestampReps);
				MDIFF(d, i2, i1, icmpOutAddrMasks);
				MDIFF(d, i2, i1, icmpOutAddrMaskReps);
				MDIFF(d, i2, i1, icmpOutFragNeeded);
				MDIFF(d, i2, i1, icmpInOverflows);
				prevp = diffptr++;
				break;
			}
			case MIB2_ICMP6: {
	mib2_ipv6IfIcmpEntry_t *i2;
	mib2_ipv6IfIcmpEntry_t *i1;
	mib2_ipv6IfIcmpEntry_t *d;

	i2 = (mib2_ipv6IfIcmpEntry_t *)tempp2->valp;
	i1 = (mib2_ipv6IfIcmpEntry_t *)tempp1->valp;
	diffptr->group = tempp2->group;
	diffptr->mib_id = tempp2->mib_id;
	diffptr->length = tempp2->length;
	d = (mib2_ipv6IfIcmpEntry_t *)calloc(tempp2->length, 1);
	if (d == NULL)
		goto mibdiff_out_of_memory;
	diffptr->valp = d;
	MDIFF(d, i2, i1, ipv6IfIcmpInMsgs);
	MDIFF(d, i2, i1, ipv6IfIcmpInErrors);
	MDIFF(d, i2, i1, ipv6IfIcmpInDestUnreachs);
	MDIFF(d, i2, i1, ipv6IfIcmpInAdminProhibs);
	MDIFF(d, i2, i1, ipv6IfIcmpInTimeExcds);
	MDIFF(d, i2, i1, ipv6IfIcmpInParmProblems);
	MDIFF(d, i2, i1, ipv6IfIcmpInPktTooBigs);
	MDIFF(d, i2, i1, ipv6IfIcmpInEchos);
	MDIFF(d, i2, i1, ipv6IfIcmpInEchoReplies);
	MDIFF(d, i2, i1, ipv6IfIcmpInRouterSolicits);
	MDIFF(d, i2, i1, ipv6IfIcmpInRouterAdvertisements);
	MDIFF(d, i2, i1, ipv6IfIcmpInNeighborSolicits);
	MDIFF(d, i2, i1, ipv6IfIcmpInNeighborAdvertisements);
	MDIFF(d, i2, i1, ipv6IfIcmpInRedirects);
	MDIFF(d, i2, i1, ipv6IfIcmpInBadRedirects);
	MDIFF(d, i2, i1, ipv6IfIcmpInGroupMembQueries);
	MDIFF(d, i2, i1, ipv6IfIcmpInGroupMembResponses);
	MDIFF(d, i2, i1, ipv6IfIcmpInGroupMembReductions);
	MDIFF(d, i2, i1, ipv6IfIcmpInOverflows);
	MDIFF(d, i2, i1, ipv6IfIcmpOutMsgs);
	MDIFF(d, i2, i1, ipv6IfIcmpOutErrors);
	MDIFF(d, i2, i1, ipv6IfIcmpOutDestUnreachs);
	MDIFF(d, i2, i1, ipv6IfIcmpOutAdminProhibs);
	MDIFF(d, i2, i1, ipv6IfIcmpOutTimeExcds);
	MDIFF(d, i2, i1, ipv6IfIcmpOutParmProblems);
	MDIFF(d, i2, i1, ipv6IfIcmpOutPktTooBigs);
	MDIFF(d, i2, i1, ipv6IfIcmpOutEchos);
	MDIFF(d, i2, i1, ipv6IfIcmpOutEchoReplies);
	MDIFF(d, i2, i1, ipv6IfIcmpOutRouterSolicits);
	MDIFF(d, i2, i1, ipv6IfIcmpOutRouterAdvertisements);
	MDIFF(d, i2, i1, ipv6IfIcmpOutNeighborSolicits);
	MDIFF(d, i2, i1, ipv6IfIcmpOutNeighborAdvertisements);
	MDIFF(d, i2, i1, ipv6IfIcmpOutRedirects);
	MDIFF(d, i2, i1, ipv6IfIcmpOutGroupMembQueries);
	MDIFF(d, i2, i1, ipv6IfIcmpOutGroupMembResponses);
	MDIFF(d, i2, i1, ipv6IfIcmpOutGroupMembReductions);
	prevp = diffptr++;
	break;
			}
			case MIB2_TCP: {
				mib2_tcp_t *t2;
				mib2_tcp_t *t1;
				mib2_tcp_t *d;

				t2 = (mib2_tcp_t *)tempp2->valp;
				t1 = (mib2_tcp_t *)tempp1->valp;
				diffptr->group = tempp2->group;
				diffptr->mib_id = tempp2->mib_id;
				diffptr->length = tempp2->length;
				d = (mib2_tcp_t *)calloc(tempp2->length, 1);
				if (d == NULL)
					goto mibdiff_out_of_memory;
				diffptr->valp = d;
				d->tcpRtoMin = t2->tcpRtoMin;
				d->tcpRtoMax = t2->tcpRtoMax;
				d->tcpMaxConn = t2->tcpMaxConn;
				MDIFF(d, t2, t1, tcpActiveOpens);
				MDIFF(d, t2, t1, tcpPassiveOpens);
				MDIFF(d, t2, t1, tcpAttemptFails);
				MDIFF(d, t2, t1, tcpEstabResets);
				d->tcpCurrEstab = t2->tcpCurrEstab;
				MDIFF(d, t2, t1, tcpOutSegs);
				MDIFF(d, t2, t1, tcpOutDataSegs);
				MDIFF(d, t2, t1, tcpOutDataBytes);
				MDIFF(d, t2, t1, tcpRetransSegs);
				MDIFF(d, t2, t1, tcpRetransBytes);
				MDIFF(d, t2, t1, tcpOutAck);
				MDIFF(d, t2, t1, tcpOutAckDelayed);
				MDIFF(d, t2, t1, tcpOutUrg);
				MDIFF(d, t2, t1, tcpOutWinUpdate);
				MDIFF(d, t2, t1, tcpOutWinProbe);
				MDIFF(d, t2, t1, tcpOutControl);
				MDIFF(d, t2, t1, tcpOutRsts);
				MDIFF(d, t2, t1, tcpOutFastRetrans);
				MDIFF(d, t2, t1, tcpInSegs);
				MDIFF(d, t2, t1, tcpInAckSegs);
				MDIFF(d, t2, t1, tcpInAckBytes);
				MDIFF(d, t2, t1, tcpInDupAck);
				MDIFF(d, t2, t1, tcpInAckUnsent);
				MDIFF(d, t2, t1, tcpInDataInorderSegs);
				MDIFF(d, t2, t1, tcpInDataInorderBytes);
				MDIFF(d, t2, t1, tcpInDataUnorderSegs);
				MDIFF(d, t2, t1, tcpInDataUnorderBytes);
				MDIFF(d, t2, t1, tcpInDataDupSegs);
				MDIFF(d, t2, t1, tcpInDataDupBytes);
				MDIFF(d, t2, t1, tcpInDataPartDupSegs);
				MDIFF(d, t2, t1, tcpInDataPartDupBytes);
				MDIFF(d, t2, t1, tcpInDataPastWinSegs);
				MDIFF(d, t2, t1, tcpInDataPastWinBytes);
				MDIFF(d, t2, t1, tcpInWinProbe);
				MDIFF(d, t2, t1, tcpInWinUpdate);
				MDIFF(d, t2, t1, tcpInClosed);
				MDIFF(d, t2, t1, tcpRttNoUpdate);
				MDIFF(d, t2, t1, tcpRttUpdate);
				MDIFF(d, t2, t1, tcpTimRetrans);
				MDIFF(d, t2, t1, tcpTimRetransDrop);
				MDIFF(d, t2, t1, tcpTimKeepalive);
				MDIFF(d, t2, t1, tcpTimKeepaliveProbe);
				MDIFF(d, t2, t1, tcpTimKeepaliveDrop);
				MDIFF(d, t2, t1, tcpListenDrop);
				MDIFF(d, t2, t1, tcpListenDropQ0);
				MDIFF(d, t2, t1, tcpHalfOpenDrop);
				MDIFF(d, t2, t1, tcpOutSackRetransSegs);
				prevp = diffptr++;
				break;
			}
			case MIB2_UDP: {
				mib2_udp_t *u2;
				mib2_udp_t *u1;
				mib2_udp_t *d;

				u2 = (mib2_udp_t *)tempp2->valp;
				u1 = (mib2_udp_t *)tempp1->valp;
				diffptr->group = tempp2->group;
				diffptr->mib_id = tempp2->mib_id;
				diffptr->length = tempp2->length;
				d = (mib2_udp_t *)calloc(tempp2->length, 1);
				if (d == NULL)
					goto mibdiff_out_of_memory;
				diffptr->valp = d;
				MDIFF(d, u2, u1, udpInDatagrams);
				MDIFF(d, u2, u1, udpInErrors);
				MDIFF(d, u2, u1, udpOutDatagrams);
				MDIFF(d, u2, u1, udpOutErrors);
				prevp = diffptr++;
				break;
			}
			case MIB2_SCTP: {
				mib2_sctp_t *s2;
				mib2_sctp_t *s1;
				mib2_sctp_t *d;

				s2 = (mib2_sctp_t *)tempp2->valp;
				s1 = (mib2_sctp_t *)tempp1->valp;
				diffptr->group = tempp2->group;
				diffptr->mib_id = tempp2->mib_id;
				diffptr->length = tempp2->length;
				d = (mib2_sctp_t *)calloc(tempp2->length, 1);
				if (d == NULL)
					goto mibdiff_out_of_memory;
				diffptr->valp = d;
				d->sctpRtoAlgorithm = s2->sctpRtoAlgorithm;
				d->sctpRtoMin = s2->sctpRtoMin;
				d->sctpRtoMax = s2->sctpRtoMax;
				d->sctpRtoInitial = s2->sctpRtoInitial;
				d->sctpMaxAssocs = s2->sctpMaxAssocs;
				d->sctpValCookieLife = s2->sctpValCookieLife;
				d->sctpMaxInitRetr = s2->sctpMaxInitRetr;
				d->sctpCurrEstab = s2->sctpCurrEstab;
				MDIFF(d, s2, s1, sctpActiveEstab);
				MDIFF(d, s2, s1, sctpPassiveEstab);
				MDIFF(d, s2, s1, sctpAborted);
				MDIFF(d, s2, s1, sctpShutdowns);
				MDIFF(d, s2, s1, sctpOutOfBlue);
				MDIFF(d, s2, s1, sctpChecksumError);
				MDIFF(d, s2, s1, sctpOutCtrlChunks);
				MDIFF(d, s2, s1, sctpOutOrderChunks);
				MDIFF(d, s2, s1, sctpOutUnorderChunks);
				MDIFF(d, s2, s1, sctpRetransChunks);
				MDIFF(d, s2, s1, sctpOutAck);
				MDIFF(d, s2, s1, sctpOutAckDelayed);
				MDIFF(d, s2, s1, sctpOutWinUpdate);
				MDIFF(d, s2, s1, sctpOutFastRetrans);
				MDIFF(d, s2, s1, sctpOutWinProbe);
				MDIFF(d, s2, s1, sctpInCtrlChunks);
				MDIFF(d, s2, s1, sctpInOrderChunks);
				MDIFF(d, s2, s1, sctpInUnorderChunks);
				MDIFF(d, s2, s1, sctpInAck);
				MDIFF(d, s2, s1, sctpInDupAck);
				MDIFF(d, s2, s1, sctpInAckUnsent);
				MDIFF(d, s2, s1, sctpFragUsrMsgs);
				MDIFF(d, s2, s1, sctpReasmUsrMsgs);
				MDIFF(d, s2, s1, sctpOutSCTPPkts);
				MDIFF(d, s2, s1, sctpInSCTPPkts);
				MDIFF(d, s2, s1, sctpInInvalidCookie);
				MDIFF(d, s2, s1, sctpTimRetrans);
				MDIFF(d, s2, s1, sctpTimRetransDrop);
				MDIFF(d, s2, s1, sctpTimHeartBeatProbe);
				MDIFF(d, s2, s1, sctpTimHeartBeatDrop);
				MDIFF(d, s2, s1, sctpListenDrop);
				MDIFF(d, s2, s1, sctpInClosed);
				prevp = diffptr++;
				break;
			}
			case EXPER_RAWIP: {
				mib2_rawip_t *r2;
				mib2_rawip_t *r1;
				mib2_rawip_t *d;

				r2 = (mib2_rawip_t *)tempp2->valp;
				r1 = (mib2_rawip_t *)tempp1->valp;
				diffptr->group = tempp2->group;
				diffptr->mib_id = tempp2->mib_id;
				diffptr->length = tempp2->length;
				d = (mib2_rawip_t *)calloc(tempp2->length, 1);
				if (d == NULL)
					goto mibdiff_out_of_memory;
				diffptr->valp = d;
				MDIFF(d, r2, r1, rawipInDatagrams);
				MDIFF(d, r2, r1, rawipInErrors);
				MDIFF(d, r2, r1, rawipInCksumErrs);
				MDIFF(d, r2, r1, rawipOutDatagrams);
				MDIFF(d, r2, r1, rawipOutErrors);
				prevp = diffptr++;
				break;
			}
			/*
			 * there are more "group" types but they aren't
			 * required for the -s and -Ms options
			 */
			}
		} /* 'for' loop 2 ends */
		tempp1 = NULL;
	} /* 'for' loop 1 ends */
	tempp2 = NULL;
	diffptr--;
	diffptr->next_item = NULL;
	return (diffp);

mibdiff_out_of_memory:;
	mib_item_destroy(&diffp);
	return (NULL);
}

/*
 * mib_item_destroy: cleans up a mib_item_t *
 * that was created by calling mib_item_dup or
 * mib_item_diff
 */
static void
mib_item_destroy(mib_item_t **itemp) {
	int	nitems = 0;
	int	c = 0;
	mib_item_t *tempp;

	if (itemp == NULL || *itemp == NULL)
		return;

	for (tempp = *itemp; tempp != NULL; tempp = tempp->next_item)
		if (tempp->mib_id == 0)
			nitems++;
		else
			return;	/* cannot destroy! */

	if (nitems == 0)
		return;		/* cannot destroy! */

	for (c = nitems - 1; c >= 0; c--) {
		if ((itemp[0][c]).valp != NULL)
			free((itemp[0][c]).valp);
	}
	free(*itemp);

	*itemp = NULL;
}

/* Compare two Octet_ts.  Return B_TRUE if they match, B_FALSE if not. */
static boolean_t
octetstrmatch(const Octet_t *a, const Octet_t *b)
{
	if (a == NULL || b == NULL)
		return (B_FALSE);

	if (a->o_length != b->o_length)
		return (B_FALSE);

	return (memcmp(a->o_bytes, b->o_bytes, a->o_length) == 0);
}

/* If octetstr() changes make an appropriate change to STR_EXPAND */
static char *
octetstr(const Octet_t *op, int code, char *dst, uint_t dstlen)
{
	int	i;
	char	*cp;

	cp = dst;
	if (op) {
		for (i = 0; i < op->o_length; i++) {
			switch (code) {
			case 'd':
				if (cp - dst + 4 > dstlen) {
					*cp = '\0';
					return (dst);
				}
				(void) snprintf(cp, 5, "%d.",
				    0xff & op->o_bytes[i]);
				cp = strchr(cp, '\0');
				break;
			case 'a':
				if (cp - dst + 1 > dstlen) {
					*cp = '\0';
					return (dst);
				}
				*cp++ = op->o_bytes[i];
				break;
			case 'h':
			default:
				if (cp - dst + 3 > dstlen) {
					*cp = '\0';
					return (dst);
				}
				(void) snprintf(cp, 4, "%02x:",
				    0xff & op->o_bytes[i]);
				cp += 3;
				break;
			}
		}
	}
	if (code != 'a' && cp != dst)
		cp--;
	*cp = '\0';
	return (dst);
}

static const char *
mitcp_state(int state, const mib2_transportMLPEntry_t *attr)
{
	static char tcpsbuf[50];
	const char *cp;

	switch (state) {
	case TCPS_CLOSED:
		cp = "CLOSED";
		break;
	case TCPS_IDLE:
		cp = "IDLE";
		break;
	case TCPS_BOUND:
		cp = "BOUND";
		break;
	case TCPS_LISTEN:
		cp = "LISTEN";
		break;
	case TCPS_SYN_SENT:
		cp = "SYN_SENT";
		break;
	case TCPS_SYN_RCVD:
		cp = "SYN_RCVD";
		break;
	case TCPS_ESTABLISHED:
		cp = "ESTABLISHED";
		break;
	case TCPS_CLOSE_WAIT:
		cp = "CLOSE_WAIT";
		break;
	case TCPS_FIN_WAIT_1:
		cp = "FIN_WAIT_1";
		break;
	case TCPS_CLOSING:
		cp = "CLOSING";
		break;
	case TCPS_LAST_ACK:
		cp = "LAST_ACK";
		break;
	case TCPS_FIN_WAIT_2:
		cp = "FIN_WAIT_2";
		break;
	case TCPS_TIME_WAIT:
		cp = "TIME_WAIT";
		break;
	default:
		(void) snprintf(tcpsbuf, sizeof (tcpsbuf),
		    "UnknownState(%d)", state);
		cp = tcpsbuf;
		break;
	}

	if (RSECflag && attr != NULL && attr->tme_flags != 0) {
		if (cp != tcpsbuf) {
			(void) strlcpy(tcpsbuf, cp, sizeof (tcpsbuf));
			cp = tcpsbuf;
		}
		if (attr->tme_flags & MIB2_TMEF_PRIVATE)
			(void) strlcat(tcpsbuf, " P", sizeof (tcpsbuf));
		if (attr->tme_flags & MIB2_TMEF_SHARED)
			(void) strlcat(tcpsbuf, " S", sizeof (tcpsbuf));
	}

	return (cp);
}

static const char *
miudp_state(int state, const mib2_transportMLPEntry_t *attr)
{
	static char udpsbuf[50];
	const char *cp;

	switch (state) {
	case MIB2_UDP_unbound:
		cp = "Unbound";
		break;
	case MIB2_UDP_idle:
		cp = "Idle";
		break;
	case MIB2_UDP_connected:
		cp = "Connected";
		break;
	default:
		(void) snprintf(udpsbuf, sizeof (udpsbuf),
		    "Unknown State(%d)", state);
		cp = udpsbuf;
		break;
	}

	if (RSECflag && attr != NULL && attr->tme_flags != 0) {
		if (cp != udpsbuf) {
			(void) strlcpy(udpsbuf, cp, sizeof (udpsbuf));
			cp = udpsbuf;
		}
		if (attr->tme_flags & MIB2_TMEF_PRIVATE)
			(void) strlcat(udpsbuf, " P", sizeof (udpsbuf));
		if (attr->tme_flags & MIB2_TMEF_SHARED)
			(void) strlcat(udpsbuf, " S", sizeof (udpsbuf));
	}

	return (cp);
}

static int odd;

static void
prval_init(void)
{
	odd = 0;
}

static void
prval(char *str, Counter val)
{
	(void) printf("\t%-20s=%6u", str, val);
	if (odd++ & 1)
		(void) putchar('\n');
}

static void
prval64(char *str, Counter64 val)
{
	(void) printf("\t%-20s=%6llu", str, val);
	if (odd++ & 1)
		(void) putchar('\n');
}

static void
pr_int_val(char *str, int val)
{
	(void) printf("\t%-20s=%6d", str, val);
	if (odd++ & 1)
		(void) putchar('\n');
}

static void
pr_sctp_rtoalgo(char *str, int val)
{
	(void) printf("\t%-20s=", str);
	switch (val) {
		case MIB2_SCTP_RTOALGO_OTHER:
			(void) printf("%6.6s", "other");
			break;

		case MIB2_SCTP_RTOALGO_VANJ:
			(void) printf("%6.6s", "vanj");
			break;

		default:
			(void) printf("%6d", val);
			break;
	}
	if (odd++ & 1)
		(void) putchar('\n');
}

static void
prval_end(void)
{
	if (odd++ & 1)
		(void) putchar('\n');
}

/* Extract constant sizes */
static void
mib_get_constants(mib_item_t *item)
{
	/* 'for' loop 1: */
	for (; item; item = item->next_item) {
		if (item->mib_id != 0)
			continue; /* 'for' loop 1 */

		switch (item->group) {
		case MIB2_IP: {
			mib2_ip_t	*ip = (mib2_ip_t *)item->valp;

			ipAddrEntrySize = ip->ipAddrEntrySize;
			ipRouteEntrySize = ip->ipRouteEntrySize;
			ipNetToMediaEntrySize = ip->ipNetToMediaEntrySize;
			ipMemberEntrySize = ip->ipMemberEntrySize;
			ipGroupSourceEntrySize = ip->ipGroupSourceEntrySize;
			ipRouteAttributeSize = ip->ipRouteAttributeSize;
			transportMLPSize = ip->transportMLPSize;
			assert(IS_P2ALIGNED(ipAddrEntrySize,
			    sizeof (mib2_ipAddrEntry_t *)) &&
			    IS_P2ALIGNED(ipRouteEntrySize,
				sizeof (mib2_ipRouteEntry_t *)) &&
			    IS_P2ALIGNED(ipNetToMediaEntrySize,
				sizeof (mib2_ipNetToMediaEntry_t *)) &&
			    IS_P2ALIGNED(ipMemberEntrySize,
				sizeof (ip_member_t *)) &&
			    IS_P2ALIGNED(ipGroupSourceEntrySize,
				sizeof (ip_grpsrc_t *)) &&
			    IS_P2ALIGNED(ipRouteAttributeSize,
				sizeof (mib2_ipAttributeEntry_t *)) &&
			    IS_P2ALIGNED(transportMLPSize,
				sizeof (mib2_transportMLPEntry_t *)));
			break;
		}
		case EXPER_DVMRP: {
			struct mrtstat	*mrts = (struct mrtstat *)item->valp;

			vifctlSize = mrts->mrts_vifctlSize;
			mfcctlSize = mrts->mrts_mfcctlSize;
			assert(IS_P2ALIGNED(vifctlSize,
			    sizeof (struct vifclt *)) &&
			    IS_P2ALIGNED(mfcctlSize, sizeof (struct mfcctl *)));
			break;
		}
		case MIB2_IP6: {
			mib2_ipv6IfStatsEntry_t *ip6;
			/* Just use the first entry */

			ip6 = (mib2_ipv6IfStatsEntry_t *)item->valp;
			ipv6IfStatsEntrySize = ip6->ipv6IfStatsEntrySize;
			ipv6AddrEntrySize = ip6->ipv6AddrEntrySize;
			ipv6RouteEntrySize = ip6->ipv6RouteEntrySize;
			ipv6NetToMediaEntrySize = ip6->ipv6NetToMediaEntrySize;
			ipv6MemberEntrySize = ip6->ipv6MemberEntrySize;
			ipv6GroupSourceEntrySize =
			    ip6->ipv6GroupSourceEntrySize;
			assert(IS_P2ALIGNED(ipv6IfStatsEntrySize,
			    sizeof (mib2_ipv6IfStatsEntry_t *)) &&
			    IS_P2ALIGNED(ipv6AddrEntrySize,
				sizeof (mib2_ipv6AddrEntry_t *)) &&
			    IS_P2ALIGNED(ipv6RouteEntrySize,
				sizeof (mib2_ipv6RouteEntry_t *)) &&
			    IS_P2ALIGNED(ipv6NetToMediaEntrySize,
				sizeof (mib2_ipv6NetToMediaEntry_t *)) &&
			    IS_P2ALIGNED(ipv6MemberEntrySize,
				sizeof (ipv6_member_t *)) &&
			    IS_P2ALIGNED(ipv6GroupSourceEntrySize,
				sizeof (ipv6_grpsrc_t *)));
			break;
		}
		case MIB2_ICMP6: {
			mib2_ipv6IfIcmpEntry_t *icmp6;
			/* Just use the first entry */

			icmp6 = (mib2_ipv6IfIcmpEntry_t *)item->valp;
			ipv6IfIcmpEntrySize = icmp6->ipv6IfIcmpEntrySize;
			assert(IS_P2ALIGNED(ipv6IfIcmpEntrySize,
			    sizeof (mib2_ipv6IfIcmpEntry_t *)));
			break;
		}
		case MIB2_TCP: {
			mib2_tcp_t	*tcp = (mib2_tcp_t *)item->valp;

			tcpConnEntrySize = tcp->tcpConnTableSize;
			tcp6ConnEntrySize = tcp->tcp6ConnTableSize;
			assert(IS_P2ALIGNED(tcpConnEntrySize,
			    sizeof (mib2_tcpConnEntry_t *)) &&
			    IS_P2ALIGNED(tcp6ConnEntrySize,
				sizeof (mib2_tcp6ConnEntry_t *)));
			break;
		}
		case MIB2_UDP: {
			mib2_udp_t	*udp = (mib2_udp_t *)item->valp;

			udpEntrySize = udp->udpEntrySize;
			udp6EntrySize = udp->udp6EntrySize;
			assert(IS_P2ALIGNED(udpEntrySize,
			    sizeof (mib2_udpEntry_t *)) &&
			    IS_P2ALIGNED(udp6EntrySize,
				sizeof (mib2_udp6Entry_t *)));
			break;
		}
		case MIB2_SCTP: {
			mib2_sctp_t	*sctp = (mib2_sctp_t *)item->valp;

			sctpEntrySize = sctp->sctpEntrySize;
			sctpLocalEntrySize = sctp->sctpLocalEntrySize;
			sctpRemoteEntrySize = sctp->sctpRemoteEntrySize;
			break;
		}
		}
	} /* 'for' loop 1 ends */

	if (Dflag) {
		(void) puts("mib_get_constants:");
		(void) printf("\tipv6IfStatsEntrySize %d\n",
		    ipv6IfStatsEntrySize);
		(void) printf("\tipAddrEntrySize %d\n", ipAddrEntrySize);
		(void) printf("\tipRouteEntrySize %d\n", ipRouteEntrySize);
		(void) printf("\tipNetToMediaEntrySize %d\n",
		    ipNetToMediaEntrySize);
		(void) printf("\tipMemberEntrySize %d\n", ipMemberEntrySize);
		(void) printf("\tipRouteAttributeSize %d\n",
		    ipRouteAttributeSize);
		(void) printf("\tvifctlSize %d\n", vifctlSize);
		(void) printf("\tmfcctlSize %d\n", mfcctlSize);

		(void) printf("\tipv6AddrEntrySize %d\n", ipv6AddrEntrySize);
		(void) printf("\tipv6RouteEntrySize %d\n", ipv6RouteEntrySize);
		(void) printf("\tipv6NetToMediaEntrySize %d\n",
		    ipv6NetToMediaEntrySize);
		(void) printf("\tipv6MemberEntrySize %d\n",
		    ipv6MemberEntrySize);
		(void) printf("\tipv6IfIcmpEntrySize %d\n",
		    ipv6IfIcmpEntrySize);
		(void) printf("\ttransportMLPSize %d\n", transportMLPSize);
		(void) printf("\ttcpConnEntrySize %d\n", tcpConnEntrySize);
		(void) printf("\ttcp6ConnEntrySize %d\n", tcp6ConnEntrySize);
		(void) printf("\tudpEntrySize %d\n", udpEntrySize);
		(void) printf("\tudp6EntrySize %d\n", udp6EntrySize);
		(void) printf("\tsctpEntrySize %d\n", sctpEntrySize);
		(void) printf("\tsctpLocalEntrySize %d\n", sctpLocalEntrySize);
		(void) printf("\tsctpRemoteEntrySize %d\n",
		    sctpRemoteEntrySize);
	}
}


/* ----------------------------- STAT_REPORT ------------------------------- */

static void
stat_report(mib_item_t *item)
{
	int	jtemp = 0;
	char	ifname[LIFNAMSIZ + 1];
	char	*ifnamep;

	/* 'for' loop 1: */
	for (; item; item = item->next_item) {
		if (Dflag) {
			(void) printf("\n--- Entry %d ---\n", ++jtemp);
			(void) printf("Group = %d, mib_id = %d, "
			    "length = %d, valp = 0x%p\n",
			    item->group, item->mib_id,
			    item->length, item->valp);
		}
		if (item->mib_id != 0)
			continue; /* 'for' loop 1 */

		switch (item->group) {
		case MIB2_IP: {
			mib2_ip_t	*ip = (mib2_ip_t *)item->valp;

			if (protocol_selected(IPPROTO_IP) &&
			    family_selected(AF_INET)) {
				(void) fputs(v4compat ? "\nIP" : "\nIPv4",
				    stdout);
				print_ip_stats(ip);
			}
			break;
		}
		case MIB2_ICMP: {
			mib2_icmp_t	*icmp =
			    (mib2_icmp_t *)item->valp;

			if (protocol_selected(IPPROTO_ICMP) &&
			    family_selected(AF_INET)) {
				(void) fputs(v4compat ? "\nICMP" : "\nICMPv4",
				    stdout);
				print_icmp_stats(icmp);
			}
			break;
		}
		case MIB2_IP6: {
			mib2_ipv6IfStatsEntry_t *ip6;
			mib2_ipv6IfStatsEntry_t sum6;

			if (!(protocol_selected(IPPROTO_IPV6)) ||
			    !(family_selected(AF_INET6)))
				break;
			bzero(&sum6, sizeof (sum6));
			/* 'for' loop 2a: */
			for (ip6 = (mib2_ipv6IfStatsEntry_t *)item->valp;
			    (char *)ip6 < (char *)item->valp
			    + item->length;
			    /* LINTED: (note 1) */
			    ip6 = (mib2_ipv6IfStatsEntry_t *)((char *)ip6 +
			    ipv6IfStatsEntrySize)) {

				if (ip6->ipv6IfIndex == 0) {
					/*
					 * The "unknown interface" ip6
					 * mib. Just add to the sum.
					 */
					sum_ip6_stats(ip6, &sum6);
					continue; /* 'for' loop 2a */
				}
				ifnamep = if_indextoname(
				    ip6->ipv6IfIndex,
				    ifname);
				if (ifnamep == NULL) {
					(void) printf(
					    "Invalid ifindex %d\n",
					    ip6->ipv6IfIndex);
					continue; /* 'for' loop 2a */
				}

				if (Aflag) {
					(void) printf("\nIPv6 for %s\n",
					    ifnamep);
					print_ip6_stats(ip6);
				}
				sum_ip6_stats(ip6, &sum6);
			} /* 'for' loop 2a ends */
			(void) fputs("\nIPv6", stdout);
			print_ip6_stats(&sum6);
			break;
		}
		case MIB2_ICMP6: {
			mib2_ipv6IfIcmpEntry_t *icmp6;
			mib2_ipv6IfIcmpEntry_t sum6;

			if (!(protocol_selected(IPPROTO_ICMPV6)) ||
			    !(family_selected(AF_INET6)))
				break;
			bzero(&sum6, sizeof (sum6));
			/* 'for' loop 2b: */
			for (icmp6 =
			    (mib2_ipv6IfIcmpEntry_t *)item->valp;
			    (char *)icmp6 < (char *)item->valp
				+ item->length;
			    icmp6 =
				/* LINTED: (note 1) */
				(mib2_ipv6IfIcmpEntry_t *)((char *)icmp6
			    + ipv6IfIcmpEntrySize)) {

				if (icmp6->ipv6IfIcmpIfIndex == 0) {
					/*
					 * The "unknown interface" icmp6
					 * mib. Just add to the sum.
					 */
					sum_icmp6_stats(icmp6, &sum6);
					continue; /* 'for' loop 2b: */
				}
				ifnamep = if_indextoname(
				    icmp6->ipv6IfIcmpIfIndex, ifname);
				if (ifnamep == NULL) {
					(void) printf(
					    "Invalid ifindex %d\n",
					    icmp6->ipv6IfIcmpIfIndex);
					continue; /* 'for' loop 2b: */
				}

				if (Aflag) {
					(void) printf(
					    "\nICMPv6 for %s\n",
					    ifnamep);
					print_icmp6_stats(icmp6);
				}
				sum_icmp6_stats(icmp6, &sum6);
			} /* 'for' loop 2b ends */
			(void) fputs("\nICMPv6", stdout);
			print_icmp6_stats(&sum6);
			break;
		}
		case MIB2_TCP: {
			mib2_tcp_t	*tcp = (mib2_tcp_t *)item->valp;

			if (protocol_selected(IPPROTO_TCP) &&
			    (family_selected(AF_INET) ||
			    family_selected(AF_INET6))) {
				(void) fputs("\nTCP", stdout);
				print_tcp_stats(tcp);
			}
			break;
		}
		case MIB2_UDP: {
			mib2_udp_t	*udp = (mib2_udp_t *)item->valp;

			if (protocol_selected(IPPROTO_UDP) &&
			    (family_selected(AF_INET) ||
			    family_selected(AF_INET6))) {
				(void) fputs("\nUDP", stdout);
				print_udp_stats(udp);
			}
			break;
		}
		case MIB2_SCTP: {
			mib2_sctp_t	*sctp = (mib2_sctp_t *)item->valp;

			if (protocol_selected(IPPROTO_SCTP) &&
			    (family_selected(AF_INET) ||
			    family_selected(AF_INET6))) {
				(void) fputs("\nSCTP", stdout);
				print_sctp_stats(sctp);
			}
			break;
		}
		case EXPER_RAWIP: {
			mib2_rawip_t	*rawip =
			    (mib2_rawip_t *)item->valp;

			if (protocol_selected(IPPROTO_RAW) &&
			    (family_selected(AF_INET) ||
			    family_selected(AF_INET6))) {
				(void) fputs("\nRAWIP", stdout);
				print_rawip_stats(rawip);
			}
			break;
		}
		case EXPER_IGMP: {
			struct igmpstat	*igps =
			    (struct igmpstat *)item->valp;

			if (protocol_selected(IPPROTO_IGMP) &&
			    (family_selected(AF_INET))) {
				(void) fputs("\nIGMP:\n", stdout);
				print_igmp_stats(igps);
			}
			break;
		}
		}
	} /* 'for' loop 1 ends */
	(void) putchar('\n');
	(void) fflush(stdout);
}

static void
print_ip_stats(mib2_ip_t *ip)
{
	prval_init();
	pr_int_val("ipForwarding",	ip->ipForwarding);
	pr_int_val("ipDefaultTTL",	ip->ipDefaultTTL);
	prval("ipInReceives",		ip->ipInReceives);
	prval("ipInHdrErrors",		ip->ipInHdrErrors);
	prval("ipInAddrErrors",		ip->ipInAddrErrors);
	prval("ipInCksumErrs",		ip->ipInCksumErrs);
	prval("ipForwDatagrams",	ip->ipForwDatagrams);
	prval("ipForwProhibits",	ip->ipForwProhibits);
	prval("ipInUnknownProtos",	ip->ipInUnknownProtos);
	prval("ipInDiscards",		ip->ipInDiscards);
	prval("ipInDelivers",		ip->ipInDelivers);
	prval("ipOutRequests",		ip->ipOutRequests);
	prval("ipOutDiscards",		ip->ipOutDiscards);
	prval("ipOutNoRoutes",		ip->ipOutNoRoutes);
	pr_int_val("ipReasmTimeout",	ip->ipReasmTimeout);
	prval("ipReasmReqds",		ip->ipReasmReqds);
	prval("ipReasmOKs",		ip->ipReasmOKs);
	prval("ipReasmFails",		ip->ipReasmFails);
	prval("ipReasmDuplicates",	ip->ipReasmDuplicates);
	prval("ipReasmPartDups",	ip->ipReasmPartDups);
	prval("ipFragOKs",		ip->ipFragOKs);
	prval("ipFragFails",		ip->ipFragFails);
	prval("ipFragCreates",		ip->ipFragCreates);
	prval("ipRoutingDiscards",	ip->ipRoutingDiscards);

	prval("tcpInErrs",		ip->tcpInErrs);
	prval("udpNoPorts",		ip->udpNoPorts);
	prval("udpInCksumErrs",		ip->udpInCksumErrs);
	prval("udpInOverflows",		ip->udpInOverflows);
	prval("rawipInOverflows",	ip->rawipInOverflows);
	prval("ipsecInSucceeded",	ip->ipsecInSucceeded);
	prval("ipsecInFailed",		ip->ipsecInFailed);
	prval("ipInIPv6",		ip->ipInIPv6);
	prval("ipOutIPv6",		ip->ipOutIPv6);
	prval("ipOutSwitchIPv6",	ip->ipOutSwitchIPv6);
	prval_end();
}

static void
print_icmp_stats(mib2_icmp_t *icmp)
{
	prval_init();
	prval("icmpInMsgs",		icmp->icmpInMsgs);
	prval("icmpInErrors",		icmp->icmpInErrors);
	prval("icmpInCksumErrs",	icmp->icmpInCksumErrs);
	prval("icmpInUnknowns",		icmp->icmpInUnknowns);
	prval("icmpInDestUnreachs",	icmp->icmpInDestUnreachs);
	prval("icmpInTimeExcds",	icmp->icmpInTimeExcds);
	prval("icmpInParmProbs",	icmp->icmpInParmProbs);
	prval("icmpInSrcQuenchs",	icmp->icmpInSrcQuenchs);
	prval("icmpInRedirects",	icmp->icmpInRedirects);
	prval("icmpInBadRedirects",	icmp->icmpInBadRedirects);
	prval("icmpInEchos",		icmp->icmpInEchos);
	prval("icmpInEchoReps",		icmp->icmpInEchoReps);
	prval("icmpInTimestamps",	icmp->icmpInTimestamps);
	prval("icmpInTimestampReps",	icmp->icmpInTimestampReps);
	prval("icmpInAddrMasks",	icmp->icmpInAddrMasks);
	prval("icmpInAddrMaskReps",	icmp->icmpInAddrMaskReps);
	prval("icmpInFragNeeded",	icmp->icmpInFragNeeded);
	prval("icmpOutMsgs",		icmp->icmpOutMsgs);
	prval("icmpOutDrops",		icmp->icmpOutDrops);
	prval("icmpOutErrors",		icmp->icmpOutErrors);
	prval("icmpOutDestUnreachs",	icmp->icmpOutDestUnreachs);
	prval("icmpOutTimeExcds",	icmp->icmpOutTimeExcds);
	prval("icmpOutParmProbs",	icmp->icmpOutParmProbs);
	prval("icmpOutSrcQuenchs",	icmp->icmpOutSrcQuenchs);
	prval("icmpOutRedirects",	icmp->icmpOutRedirects);
	prval("icmpOutEchos",		icmp->icmpOutEchos);
	prval("icmpOutEchoReps",	icmp->icmpOutEchoReps);
	prval("icmpOutTimestamps",	icmp->icmpOutTimestamps);
	prval("icmpOutTimestampReps",	icmp->icmpOutTimestampReps);
	prval("icmpOutAddrMasks",	icmp->icmpOutAddrMasks);
	prval("icmpOutAddrMaskReps",	icmp->icmpOutAddrMaskReps);
	prval("icmpOutFragNeeded",	icmp->icmpOutFragNeeded);
	prval("icmpInOverflows",	icmp->icmpInOverflows);
	prval_end();
}

static void
print_ip6_stats(mib2_ipv6IfStatsEntry_t *ip6)
{
	prval_init();
	prval("ipv6Forwarding",		ip6->ipv6Forwarding);
	prval("ipv6DefaultHopLimit",	ip6->ipv6DefaultHopLimit);

	prval("ipv6InReceives",		ip6->ipv6InReceives);
	prval("ipv6InHdrErrors",	ip6->ipv6InHdrErrors);
	prval("ipv6InTooBigErrors",	ip6->ipv6InTooBigErrors);
	prval("ipv6InNoRoutes",		ip6->ipv6InNoRoutes);
	prval("ipv6InAddrErrors",	ip6->ipv6InAddrErrors);
	prval("ipv6InUnknownProtos",	ip6->ipv6InUnknownProtos);
	prval("ipv6InTruncatedPkts",	ip6->ipv6InTruncatedPkts);
	prval("ipv6InDiscards",		ip6->ipv6InDiscards);
	prval("ipv6InDelivers",		ip6->ipv6InDelivers);
	prval("ipv6OutForwDatagrams",	ip6->ipv6OutForwDatagrams);
	prval("ipv6OutRequests",	ip6->ipv6OutRequests);
	prval("ipv6OutDiscards",	ip6->ipv6OutDiscards);
	prval("ipv6OutNoRoutes",	ip6->ipv6OutNoRoutes);
	prval("ipv6OutFragOKs",		ip6->ipv6OutFragOKs);
	prval("ipv6OutFragFails",	ip6->ipv6OutFragFails);
	prval("ipv6OutFragCreates",	ip6->ipv6OutFragCreates);
	prval("ipv6ReasmReqds",		ip6->ipv6ReasmReqds);
	prval("ipv6ReasmOKs",		ip6->ipv6ReasmOKs);
	prval("ipv6ReasmFails",		ip6->ipv6ReasmFails);
	prval("ipv6InMcastPkts",	ip6->ipv6InMcastPkts);
	prval("ipv6OutMcastPkts",	ip6->ipv6OutMcastPkts);
	prval("ipv6ReasmDuplicates",	ip6->ipv6ReasmDuplicates);
	prval("ipv6ReasmPartDups",	ip6->ipv6ReasmPartDups);
	prval("ipv6ForwProhibits",	ip6->ipv6ForwProhibits);
	prval("udpInCksumErrs",		ip6->udpInCksumErrs);
	prval("udpInOverflows",		ip6->udpInOverflows);
	prval("rawipInOverflows",	ip6->rawipInOverflows);
	prval("ipv6InIPv4",		ip6->ipv6InIPv4);
	prval("ipv6OutIPv4",		ip6->ipv6OutIPv4);
	prval("ipv6OutSwitchIPv4",	ip6->ipv6OutSwitchIPv4);
	prval_end();
}

static void
print_icmp6_stats(mib2_ipv6IfIcmpEntry_t *icmp6)
{
	prval_init();
	prval("icmp6InMsgs",		icmp6->ipv6IfIcmpInMsgs);
	prval("icmp6InErrors",		icmp6->ipv6IfIcmpInErrors);
	prval("icmp6InDestUnreachs",	icmp6->ipv6IfIcmpInDestUnreachs);
	prval("icmp6InAdminProhibs",	icmp6->ipv6IfIcmpInAdminProhibs);
	prval("icmp6InTimeExcds",	icmp6->ipv6IfIcmpInTimeExcds);
	prval("icmp6InParmProblems",	icmp6->ipv6IfIcmpInParmProblems);
	prval("icmp6InPktTooBigs",	icmp6->ipv6IfIcmpInPktTooBigs);
	prval("icmp6InEchos",		icmp6->ipv6IfIcmpInEchos);
	prval("icmp6InEchoReplies",	icmp6->ipv6IfIcmpInEchoReplies);
	prval("icmp6InRouterSols",	icmp6->ipv6IfIcmpInRouterSolicits);
	prval("icmp6InRouterAds",
	    icmp6->ipv6IfIcmpInRouterAdvertisements);
	prval("icmp6InNeighborSols",	icmp6->ipv6IfIcmpInNeighborSolicits);
	prval("icmp6InNeighborAds",
	    icmp6->ipv6IfIcmpInNeighborAdvertisements);
	prval("icmp6InRedirects",	icmp6->ipv6IfIcmpInRedirects);
	prval("icmp6InBadRedirects",	icmp6->ipv6IfIcmpInBadRedirects);
	prval("icmp6InGroupQueries",	icmp6->ipv6IfIcmpInGroupMembQueries);
	prval("icmp6InGroupResps",	icmp6->ipv6IfIcmpInGroupMembResponses);
	prval("icmp6InGroupReds",	icmp6->ipv6IfIcmpInGroupMembReductions);
	prval("icmp6InOverflows",	icmp6->ipv6IfIcmpInOverflows);
	prval_end();
	prval_init();
	prval("icmp6OutMsgs",		icmp6->ipv6IfIcmpOutMsgs);
	prval("icmp6OutErrors",		icmp6->ipv6IfIcmpOutErrors);
	prval("icmp6OutDestUnreachs",	icmp6->ipv6IfIcmpOutDestUnreachs);
	prval("icmp6OutAdminProhibs",	icmp6->ipv6IfIcmpOutAdminProhibs);
	prval("icmp6OutTimeExcds",	icmp6->ipv6IfIcmpOutTimeExcds);
	prval("icmp6OutParmProblems",	icmp6->ipv6IfIcmpOutParmProblems);
	prval("icmp6OutPktTooBigs",	icmp6->ipv6IfIcmpOutPktTooBigs);
	prval("icmp6OutEchos",		icmp6->ipv6IfIcmpOutEchos);
	prval("icmp6OutEchoReplies",	icmp6->ipv6IfIcmpOutEchoReplies);
	prval("icmp6OutRouterSols",	icmp6->ipv6IfIcmpOutRouterSolicits);
	prval("icmp6OutRouterAds",
	    icmp6->ipv6IfIcmpOutRouterAdvertisements);
	prval("icmp6OutNeighborSols",	icmp6->ipv6IfIcmpOutNeighborSolicits);
	prval("icmp6OutNeighborAds",
	    icmp6->ipv6IfIcmpOutNeighborAdvertisements);
	prval("icmp6OutRedirects",	icmp6->ipv6IfIcmpOutRedirects);
	prval("icmp6OutGroupQueries",	icmp6->ipv6IfIcmpOutGroupMembQueries);
	prval("icmp6OutGroupResps",
	    icmp6->ipv6IfIcmpOutGroupMembResponses);
	prval("icmp6OutGroupReds",
	    icmp6->ipv6IfIcmpOutGroupMembReductions);
	prval_end();
}

static void
print_sctp_stats(mib2_sctp_t *sctp)
{
	prval_init();
	pr_sctp_rtoalgo("sctpRtoAlgorithm", sctp->sctpRtoAlgorithm);
	prval("sctpRtoMin",		sctp->sctpRtoMin);
	prval("sctpRtoMax",		sctp->sctpRtoMax);
	prval("sctpRtoInitial",		sctp->sctpRtoInitial);
	pr_int_val("sctpMaxAssocs",	sctp->sctpMaxAssocs);
	prval("sctpValCookieLife",	sctp->sctpValCookieLife);
	prval("sctpMaxInitRetr",	sctp->sctpMaxInitRetr);
	prval("sctpCurrEstab",		sctp->sctpCurrEstab);
	prval("sctpActiveEstab",	sctp->sctpActiveEstab);
	prval("sctpPassiveEstab",	sctp->sctpPassiveEstab);
	prval("sctpAborted",		sctp->sctpAborted);
	prval("sctpShutdowns",		sctp->sctpShutdowns);
	prval("sctpOutOfBlue",		sctp->sctpOutOfBlue);
	prval("sctpChecksumError",	sctp->sctpChecksumError);
	prval64("sctpOutCtrlChunks",	sctp->sctpOutCtrlChunks);
	prval64("sctpOutOrderChunks",	sctp->sctpOutOrderChunks);
	prval64("sctpOutUnorderChunks",	sctp->sctpOutUnorderChunks);
	prval64("sctpRetransChunks",	sctp->sctpRetransChunks);
	prval("sctpOutAck",		sctp->sctpOutAck);
	prval("sctpOutAckDelayed",	sctp->sctpOutAckDelayed);
	prval("sctpOutWinUpdate",	sctp->sctpOutWinUpdate);
	prval("sctpOutFastRetrans",	sctp->sctpOutFastRetrans);
	prval("sctpOutWinProbe",	sctp->sctpOutWinProbe);
	prval64("sctpInCtrlChunks",	sctp->sctpInCtrlChunks);
	prval64("sctpInOrderChunks",	sctp->sctpInOrderChunks);
	prval64("sctpInUnorderChunks",	sctp->sctpInUnorderChunks);
	prval("sctpInAck",		sctp->sctpInAck);
	prval("sctpInDupAck",		sctp->sctpInDupAck);
	prval("sctpInAckUnsent",	sctp->sctpInAckUnsent);
	prval64("sctpFragUsrMsgs",	sctp->sctpFragUsrMsgs);
	prval64("sctpReasmUsrMsgs",	sctp->sctpReasmUsrMsgs);
	prval64("sctpOutSCTPPkts",	sctp->sctpOutSCTPPkts);
	prval64("sctpInSCTPPkts",	sctp->sctpInSCTPPkts);
	prval("sctpInInvalidCookie",	sctp->sctpInInvalidCookie);
	prval("sctpTimRetrans",		sctp->sctpTimRetrans);
	prval("sctpTimRetransDrop",	sctp->sctpTimRetransDrop);
	prval("sctpTimHearBeatProbe",	sctp->sctpTimHeartBeatProbe);
	prval("sctpTimHearBeatDrop",	sctp->sctpTimHeartBeatDrop);
	prval("sctpListenDrop",		sctp->sctpListenDrop);
	prval("sctpInClosed",		sctp->sctpInClosed);
	prval_end();
}

static void
print_tcp_stats(mib2_tcp_t *tcp)
{
	prval_init();
	pr_int_val("tcpRtoAlgorithm",	tcp->tcpRtoAlgorithm);
	pr_int_val("tcpRtoMin",		tcp->tcpRtoMin);
	pr_int_val("tcpRtoMax",		tcp->tcpRtoMax);
	pr_int_val("tcpMaxConn",	tcp->tcpMaxConn);
	prval("tcpActiveOpens",		tcp->tcpActiveOpens);
	prval("tcpPassiveOpens",	tcp->tcpPassiveOpens);
	prval("tcpAttemptFails",	tcp->tcpAttemptFails);
	prval("tcpEstabResets",		tcp->tcpEstabResets);
	prval("tcpCurrEstab",		tcp->tcpCurrEstab);
	prval("tcpOutSegs",		tcp->tcpOutSegs);
	prval("tcpOutDataSegs",		tcp->tcpOutDataSegs);
	prval("tcpOutDataBytes",	tcp->tcpOutDataBytes);
	prval("tcpRetransSegs",		tcp->tcpRetransSegs);
	prval("tcpRetransBytes",	tcp->tcpRetransBytes);
	prval("tcpOutAck",		tcp->tcpOutAck);
	prval("tcpOutAckDelayed",	tcp->tcpOutAckDelayed);
	prval("tcpOutUrg",		tcp->tcpOutUrg);
	prval("tcpOutWinUpdate",	tcp->tcpOutWinUpdate);
	prval("tcpOutWinProbe",		tcp->tcpOutWinProbe);
	prval("tcpOutControl",		tcp->tcpOutControl);
	prval("tcpOutRsts",		tcp->tcpOutRsts);
	prval("tcpOutFastRetrans",	tcp->tcpOutFastRetrans);
	prval("tcpInSegs",		tcp->tcpInSegs);
	prval_end();
	prval("tcpInAckSegs",		tcp->tcpInAckSegs);
	prval("tcpInAckBytes",		tcp->tcpInAckBytes);
	prval("tcpInDupAck",		tcp->tcpInDupAck);
	prval("tcpInAckUnsent",		tcp->tcpInAckUnsent);
	prval("tcpInInorderSegs",	tcp->tcpInDataInorderSegs);
	prval("tcpInInorderBytes",	tcp->tcpInDataInorderBytes);
	prval("tcpInUnorderSegs",	tcp->tcpInDataUnorderSegs);
	prval("tcpInUnorderBytes",	tcp->tcpInDataUnorderBytes);
	prval("tcpInDupSegs",		tcp->tcpInDataDupSegs);
	prval("tcpInDupBytes",		tcp->tcpInDataDupBytes);
	prval("tcpInPartDupSegs",	tcp->tcpInDataPartDupSegs);
	prval("tcpInPartDupBytes",	tcp->tcpInDataPartDupBytes);
	prval("tcpInPastWinSegs",	tcp->tcpInDataPastWinSegs);
	prval("tcpInPastWinBytes",	tcp->tcpInDataPastWinBytes);
	prval("tcpInWinProbe",		tcp->tcpInWinProbe);
	prval("tcpInWinUpdate",		tcp->tcpInWinUpdate);
	prval("tcpInClosed",		tcp->tcpInClosed);
	prval("tcpRttNoUpdate",		tcp->tcpRttNoUpdate);
	prval("tcpRttUpdate",		tcp->tcpRttUpdate);
	prval("tcpTimRetrans",		tcp->tcpTimRetrans);
	prval("tcpTimRetransDrop",	tcp->tcpTimRetransDrop);
	prval("tcpTimKeepalive",	tcp->tcpTimKeepalive);
	prval("tcpTimKeepaliveProbe",	tcp->tcpTimKeepaliveProbe);
	prval("tcpTimKeepaliveDrop",	tcp->tcpTimKeepaliveDrop);
	prval("tcpListenDrop",		tcp->tcpListenDrop);
	prval("tcpListenDropQ0",	tcp->tcpListenDropQ0);
	prval("tcpHalfOpenDrop",	tcp->tcpHalfOpenDrop);
	prval("tcpOutSackRetrans",	tcp->tcpOutSackRetransSegs);
	prval_end();

}

static void
print_udp_stats(mib2_udp_t *udp)
{
	prval_init();
	prval("udpInDatagrams",		udp->udpInDatagrams);
	prval("udpInErrors",		udp->udpInErrors);
	prval("udpOutDatagrams",	udp->udpOutDatagrams);
	prval("udpOutErrors",		udp->udpOutErrors);
	prval_end();
}

static void
print_rawip_stats(mib2_rawip_t *rawip)
{
	prval_init();
	prval("rawipInDatagrams",	rawip->rawipInDatagrams);
	prval("rawipInErrors",		rawip->rawipInErrors);
	prval("rawipInCksumErrs",	rawip->rawipInCksumErrs);
	prval("rawipOutDatagrams",	rawip->rawipOutDatagrams);
	prval("rawipOutErrors",		rawip->rawipOutErrors);
	prval_end();
}

void
print_igmp_stats(struct igmpstat *igps)
{
	(void) printf(" %10u message%s received\n",
	    igps->igps_rcv_total, PLURAL(igps->igps_rcv_total));
	(void) printf(" %10u message%s received with too few bytes\n",
	    igps->igps_rcv_tooshort, PLURAL(igps->igps_rcv_tooshort));
	(void) printf(" %10u message%s received with bad checksum\n",
	    igps->igps_rcv_badsum, PLURAL(igps->igps_rcv_badsum));
	(void) printf(" %10u membership quer%s received\n",
	    igps->igps_rcv_queries, PLURALY(igps->igps_rcv_queries));
	(void) printf(" %10u membership quer%s received with invalid "
	    "field(s)\n",
	    igps->igps_rcv_badqueries, PLURALY(igps->igps_rcv_badqueries));
	(void) printf(" %10u membership report%s received\n",
	    igps->igps_rcv_reports, PLURAL(igps->igps_rcv_reports));
	(void) printf(" %10u membership report%s received with invalid "
	    "field(s)\n",
	    igps->igps_rcv_badreports, PLURAL(igps->igps_rcv_badreports));
	(void) printf(" %10u membership report%s received for groups to "
	    "which we belong\n",
	    igps->igps_rcv_ourreports, PLURAL(igps->igps_rcv_ourreports));
	(void) printf(" %10u membership report%s sent\n",
	    igps->igps_snd_reports, PLURAL(igps->igps_snd_reports));
}

static void
print_mrt_stats(struct mrtstat *mrts)
{
	(void) puts("DVMRP multicast routing:");
	(void) printf(" %10u hit%s - kernel forwarding cache hits\n",
		mrts->mrts_mfc_hits, PLURAL(mrts->mrts_mfc_hits));
	(void) printf(" %10u miss%s - kernel forwarding cache misses\n",
		mrts->mrts_mfc_misses, PLURALES(mrts->mrts_mfc_misses));
	(void) printf(" %10u packet%s potentially forwarded\n",
		mrts->mrts_fwd_in, PLURAL(mrts->mrts_fwd_in));
	(void) printf(" %10u packet%s actually sent out\n",
		mrts->mrts_fwd_out, PLURAL(mrts->mrts_fwd_out));
	(void) printf(" %10u upcall%s - upcalls made to mrouted\n",
		mrts->mrts_upcalls, PLURAL(mrts->mrts_upcalls));
	(void) printf(" %10u packet%s not sent out due to lack of resources\n",
		mrts->mrts_fwd_drop, PLURAL(mrts->mrts_fwd_drop));
	(void) printf(" %10u datagram%s with malformed tunnel options\n",
		mrts->mrts_bad_tunnel, PLURAL(mrts->mrts_bad_tunnel));
	(void) printf(" %10u datagram%s with no room for tunnel options\n",
		mrts->mrts_cant_tunnel, PLURAL(mrts->mrts_cant_tunnel));
	(void) printf(" %10u datagram%s arrived on wrong interface\n",
		mrts->mrts_wrong_if, PLURAL(mrts->mrts_wrong_if));
	(void) printf(" %10u datagram%s dropped due to upcall Q overflow\n",
		mrts->mrts_upq_ovflw, PLURAL(mrts->mrts_upq_ovflw));
	(void) printf(" %10u datagram%s cleaned up by the cache\n",
		mrts->mrts_cache_cleanups, PLURAL(mrts->mrts_cache_cleanups));
	(void) printf(" %10u datagram%s dropped selectively by ratelimiter\n",
		mrts->mrts_drop_sel, PLURAL(mrts->mrts_drop_sel));
	(void) printf(" %10u datagram%s dropped - bucket Q overflow\n",
		mrts->mrts_q_overflow, PLURAL(mrts->mrts_q_overflow));
	(void) printf(" %10u datagram%s dropped - larger than bkt size\n",
		mrts->mrts_pkt2large, PLURAL(mrts->mrts_pkt2large));
	(void) printf("\nPIM multicast routing:\n");
	(void) printf(" %10u datagram%s dropped - bad version number\n",
		mrts->mrts_pim_badversion, PLURAL(mrts->mrts_pim_badversion));
	(void) printf(" %10u datagram%s dropped - bad checksum\n",
		mrts->mrts_pim_rcv_badcsum, PLURAL(mrts->mrts_pim_rcv_badcsum));
	(void) printf(" %10u datagram%s dropped - bad register packets\n",
		mrts->mrts_pim_badregisters,
		PLURAL(mrts->mrts_pim_badregisters));
	(void) printf(
		" %10u datagram%s potentially forwarded - register packets\n",
		mrts->mrts_pim_regforwards, PLURAL(mrts->mrts_pim_regforwards));
	(void) printf(" %10u datagram%s dropped - register send drops\n",
		mrts->mrts_pim_regsend_drops,
		PLURAL(mrts->mrts_pim_regsend_drops));
	(void) printf(" %10u datagram%s dropped - packet malformed\n",
		mrts->mrts_pim_malformed, PLURAL(mrts->mrts_pim_malformed));
	(void) printf(" %10u datagram%s dropped - no memory to forward\n",
		mrts->mrts_pim_nomemory, PLURAL(mrts->mrts_pim_nomemory));
}

static void
sum_ip6_stats(mib2_ipv6IfStatsEntry_t *ip6, mib2_ipv6IfStatsEntry_t *sum6)
{
	/* First few are not additive */
	sum6->ipv6Forwarding = ip6->ipv6Forwarding;
	sum6->ipv6DefaultHopLimit = ip6->ipv6DefaultHopLimit;

	sum6->ipv6InReceives += ip6->ipv6InReceives;
	sum6->ipv6InHdrErrors += ip6->ipv6InHdrErrors;
	sum6->ipv6InTooBigErrors += ip6->ipv6InTooBigErrors;
	sum6->ipv6InNoRoutes += ip6->ipv6InNoRoutes;
	sum6->ipv6InAddrErrors += ip6->ipv6InAddrErrors;
	sum6->ipv6InUnknownProtos += ip6->ipv6InUnknownProtos;
	sum6->ipv6InTruncatedPkts += ip6->ipv6InTruncatedPkts;
	sum6->ipv6InDiscards += ip6->ipv6InDiscards;
	sum6->ipv6InDelivers += ip6->ipv6InDelivers;
	sum6->ipv6OutForwDatagrams += ip6->ipv6OutForwDatagrams;
	sum6->ipv6OutRequests += ip6->ipv6OutRequests;
	sum6->ipv6OutDiscards += ip6->ipv6OutDiscards;
	sum6->ipv6OutFragOKs += ip6->ipv6OutFragOKs;
	sum6->ipv6OutFragFails += ip6->ipv6OutFragFails;
	sum6->ipv6OutFragCreates += ip6->ipv6OutFragCreates;
	sum6->ipv6ReasmReqds += ip6->ipv6ReasmReqds;
	sum6->ipv6ReasmOKs += ip6->ipv6ReasmOKs;
	sum6->ipv6ReasmFails += ip6->ipv6ReasmFails;
	sum6->ipv6InMcastPkts += ip6->ipv6InMcastPkts;
	sum6->ipv6OutMcastPkts += ip6->ipv6OutMcastPkts;
	sum6->ipv6OutNoRoutes += ip6->ipv6OutNoRoutes;
	sum6->ipv6ReasmDuplicates += ip6->ipv6ReasmDuplicates;
	sum6->ipv6ReasmPartDups += ip6->ipv6ReasmPartDups;
	sum6->ipv6ForwProhibits += ip6->ipv6ForwProhibits;
	sum6->udpInCksumErrs += ip6->udpInCksumErrs;
	sum6->udpInOverflows += ip6->udpInOverflows;
	sum6->rawipInOverflows += ip6->rawipInOverflows;
}

static void
sum_icmp6_stats(mib2_ipv6IfIcmpEntry_t *icmp6, mib2_ipv6IfIcmpEntry_t *sum6)
{
	sum6->ipv6IfIcmpInMsgs += icmp6->ipv6IfIcmpInMsgs;
	sum6->ipv6IfIcmpInErrors += icmp6->ipv6IfIcmpInErrors;
	sum6->ipv6IfIcmpInDestUnreachs += icmp6->ipv6IfIcmpInDestUnreachs;
	sum6->ipv6IfIcmpInAdminProhibs += icmp6->ipv6IfIcmpInAdminProhibs;
	sum6->ipv6IfIcmpInTimeExcds += icmp6->ipv6IfIcmpInTimeExcds;
	sum6->ipv6IfIcmpInParmProblems += icmp6->ipv6IfIcmpInParmProblems;
	sum6->ipv6IfIcmpInPktTooBigs += icmp6->ipv6IfIcmpInPktTooBigs;
	sum6->ipv6IfIcmpInEchos += icmp6->ipv6IfIcmpInEchos;
	sum6->ipv6IfIcmpInEchoReplies += icmp6->ipv6IfIcmpInEchoReplies;
	sum6->ipv6IfIcmpInRouterSolicits += icmp6->ipv6IfIcmpInRouterSolicits;
	sum6->ipv6IfIcmpInRouterAdvertisements +=
	    icmp6->ipv6IfIcmpInRouterAdvertisements;
	sum6->ipv6IfIcmpInNeighborSolicits +=
	    icmp6->ipv6IfIcmpInNeighborSolicits;
	sum6->ipv6IfIcmpInNeighborAdvertisements +=
	    icmp6->ipv6IfIcmpInNeighborAdvertisements;
	sum6->ipv6IfIcmpInRedirects += icmp6->ipv6IfIcmpInRedirects;
	sum6->ipv6IfIcmpInGroupMembQueries +=
	    icmp6->ipv6IfIcmpInGroupMembQueries;
	sum6->ipv6IfIcmpInGroupMembResponses +=
	    icmp6->ipv6IfIcmpInGroupMembResponses;
	sum6->ipv6IfIcmpInGroupMembReductions +=
	    icmp6->ipv6IfIcmpInGroupMembReductions;
	sum6->ipv6IfIcmpOutMsgs += icmp6->ipv6IfIcmpOutMsgs;
	sum6->ipv6IfIcmpOutErrors += icmp6->ipv6IfIcmpOutErrors;
	sum6->ipv6IfIcmpOutDestUnreachs += icmp6->ipv6IfIcmpOutDestUnreachs;
	sum6->ipv6IfIcmpOutAdminProhibs += icmp6->ipv6IfIcmpOutAdminProhibs;
	sum6->ipv6IfIcmpOutTimeExcds += icmp6->ipv6IfIcmpOutTimeExcds;
	sum6->ipv6IfIcmpOutParmProblems += icmp6->ipv6IfIcmpOutParmProblems;
	sum6->ipv6IfIcmpOutPktTooBigs += icmp6->ipv6IfIcmpOutPktTooBigs;
	sum6->ipv6IfIcmpOutEchos += icmp6->ipv6IfIcmpOutEchos;
	sum6->ipv6IfIcmpOutEchoReplies += icmp6->ipv6IfIcmpOutEchoReplies;
	sum6->ipv6IfIcmpOutRouterSolicits +=
	    icmp6->ipv6IfIcmpOutRouterSolicits;
	sum6->ipv6IfIcmpOutRouterAdvertisements +=
	    icmp6->ipv6IfIcmpOutRouterAdvertisements;
	sum6->ipv6IfIcmpOutNeighborSolicits +=
	    icmp6->ipv6IfIcmpOutNeighborSolicits;
	sum6->ipv6IfIcmpOutNeighborAdvertisements +=
	    icmp6->ipv6IfIcmpOutNeighborAdvertisements;
	sum6->ipv6IfIcmpOutRedirects += icmp6->ipv6IfIcmpOutRedirects;
	sum6->ipv6IfIcmpOutGroupMembQueries +=
	    icmp6->ipv6IfIcmpOutGroupMembQueries;