1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1983, 1988, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/param.h>
33#include <sys/protosw.h>
34#include <sys/socket.h>
35#include <sys/socketvar.h>
36#include <sys/sysctl.h>
37#include <sys/time.h>
38
39#include <net/ethernet.h>
40#include <net/if.h>
41#include <net/if_dl.h>
42#include <net/if_types.h>
43#include <net/route.h>
44
45#include <netinet/in.h>
46#include <netgraph/ng_socket.h>
47
48#include <arpa/inet.h>
49#include <ifaddrs.h>
50#include <libutil.h>
51#include <netdb.h>
52#include <stdbool.h>
53#include <stdint.h>
54#include <stdio.h>
55#include <stdlib.h>
56#include <stdbool.h>
57#include <string.h>
58#include <sysexits.h>
59#include <unistd.h>
60#include <err.h>
61#include <libxo/xo.h>
62#include "netstat.h"
63#include "common.h"
64#include "nl_defs.h"
65
66/*
67 * Definitions for showing gateway flags.
68 */
69struct bits rt_bits[] = {
70	{ RTF_UP,	'U', "up" },
71	{ RTF_GATEWAY,	'G', "gateway" },
72	{ RTF_HOST,	'H', "host" },
73	{ RTF_REJECT,	'R', "reject" },
74	{ RTF_DYNAMIC,	'D', "dynamic" },
75	{ RTF_MODIFIED,	'M', "modified" },
76	{ RTF_DONE,	'd', "done" }, /* Completed -- for routing msgs only */
77	{ RTF_XRESOLVE,	'X', "xresolve" },
78	{ RTF_STATIC,	'S', "static" },
79	{ RTF_PROTO1,	'1', "proto1" },
80	{ RTF_PROTO2,	'2', "proto2" },
81	{ RTF_PROTO3,	'3', "proto3" },
82	{ RTF_BLACKHOLE,'B', "blackhole" },
83	{ RTF_BROADCAST,'b', "broadcast" },
84#ifdef RTF_LLINFO
85	{ RTF_LLINFO,	'L', "llinfo" },
86#endif
87	{ 0 , 0, NULL }
88};
89
90#ifdef WITHOUT_NETLINK
91static struct ifmap_entry *ifmap;
92static size_t ifmap_size;
93#endif
94static struct timespec uptime;
95
96static const char *netname4(in_addr_t, in_addr_t);
97#ifdef INET6
98static const char *netname6(struct sockaddr_in6 *, struct sockaddr_in6 *);
99#endif
100#ifdef WITHOUT_NETLINK
101static void p_rtable_sysctl(int, int);
102static void p_rtentry_sysctl(const char *name, struct rt_msghdr *);
103#endif
104static void domask(char *, size_t, u_long);
105
106const uint32_t rt_default_weight = RT_DEFAULT_WEIGHT;
107
108/*
109 * Print routing tables.
110 */
111void
112routepr(int fibnum, int af)
113{
114	size_t intsize;
115	int numfibs;
116
117	if (live == 0)
118		return;
119
120	intsize = sizeof(int);
121	if (fibnum == -1 &&
122	    sysctlbyname("net.my_fibnum", &fibnum, &intsize, NULL, 0) == -1)
123		fibnum = 0;
124	if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
125		numfibs = 1;
126	if (fibnum < 0 || fibnum > numfibs - 1)
127		errx(EX_USAGE, "%d: invalid fib", fibnum);
128	/*
129	 * Since kernel & userland use different timebase
130	 * (time_uptime vs time_second) and we are reading kernel memory
131	 * directly we should do rt_expire --> expire_time conversion.
132	 */
133	if (clock_gettime(CLOCK_UPTIME, &uptime) < 0)
134		err(EX_OSERR, "clock_gettime() failed");
135
136	xo_open_container("route-information");
137	xo_emit("{T:Routing tables}");
138	if (fibnum)
139		xo_emit(" ({L:fib}: {:fib/%d})", fibnum);
140	xo_emit("\n");
141#ifdef WITHOUT_NETLINK
142	p_rtable_sysctl(fibnum, af);
143#else
144	p_rtable_netlink(fibnum, af);
145#endif
146	xo_close_container("route-information");
147}
148
149
150/*
151 * Print address family header before a section of the routing table.
152 */
153void
154pr_family(int af1)
155{
156	const char *afname;
157
158	switch (af1) {
159	case AF_INET:
160		afname = "Internet";
161		break;
162#ifdef INET6
163	case AF_INET6:
164		afname = "Internet6";
165		break;
166#endif /*INET6*/
167	case AF_ISO:
168		afname = "ISO";
169		break;
170	case AF_CCITT:
171		afname = "X.25";
172		break;
173	case AF_NETGRAPH:
174		afname = "Netgraph";
175		break;
176	default:
177		afname = NULL;
178		break;
179	}
180	if (afname)
181		xo_emit("\n{k:address-family/%s}:\n", afname);
182	else
183		xo_emit("\n{L:Protocol Family} {k:address-family/%d}:\n", af1);
184}
185
186/* column widths; each followed by one space */
187#define WID_IF_DEFAULT		(Wflag ? IFNAMSIZ : 12)	/* width of netif column */
188#ifndef INET6
189#define	WID_DST_DEFAULT(af) 	18	/* width of destination column */
190#define	WID_GW_DEFAULT(af)	18	/* width of gateway column */
191#else
192#define	WID_DST_DEFAULT(af) \
193	((af) == AF_INET6 ? (numeric_addr ? 33: 18) : 18)
194#define	WID_GW_DEFAULT(af) \
195	((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18)
196#endif /*INET6*/
197
198struct _wid wid;
199
200/*
201 * Print header for routing table columns.
202 */
203void
204pr_rthdr(int af1 __unused)
205{
206
207	if (Wflag) {
208		xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
209		    "{T:/%*.*s} {T:/%*.*s} {T:/%*s}\n",
210			wid.dst,	wid.dst,	"Destination",
211			wid.gw,		wid.gw,		"Gateway",
212			wid.flags,	wid.flags,	"Flags",
213			wid.mtu,	wid.mtu,	"Nhop#",
214			wid.mtu,	wid.mtu,	"Mtu",
215			wid.iface,	wid.iface,	"Netif",
216			wid.expire,			"Expire");
217	} else {
218		xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
219		    "{T:/%*s}\n",
220			wid.dst,	wid.dst,	"Destination",
221			wid.gw,		wid.gw,		"Gateway",
222			wid.flags,	wid.flags,	"Flags",
223			wid.iface,	wid.iface,	"Netif",
224			wid.expire,			"Expire");
225	}
226}
227
228void
229set_wid(int fam)
230{
231	wid.dst = WID_DST_DEFAULT(fam);
232	wid.gw = WID_GW_DEFAULT(fam);
233	wid.flags = 6;
234	wid.pksent = 8;
235	wid.mtu = 6;
236	wid.iface = WID_IF_DEFAULT;
237	wid.expire = 6;
238}
239
240#ifdef WITHOUT_NETLINK
241static void
242p_rtable_sysctl(int fibnum, int af)
243{
244	size_t needed;
245	int mib[7];
246	char *buf, *next, *lim;
247	struct rt_msghdr *rtm;
248	struct sockaddr *sa;
249	int fam = AF_UNSPEC;
250	int need_table_close = false;
251
252	ifmap = prepare_ifmap(&ifmap_size);
253
254	mib[0] = CTL_NET;
255	mib[1] = PF_ROUTE;
256	mib[2] = 0;
257	mib[3] = af;
258	mib[4] = NET_RT_DUMP;
259	mib[5] = 0;
260	mib[6] = fibnum;
261	if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
262		err(EX_OSERR, "sysctl: net.route.0.%d.dump.%d estimate", af,
263		    fibnum);
264	if ((buf = malloc(needed)) == NULL)
265		errx(2, "malloc(%lu)", (unsigned long)needed);
266	if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0)
267		err(1, "sysctl: net.route.0.%d.dump.%d", af, fibnum);
268	lim  = buf + needed;
269	xo_open_container("route-table");
270	xo_open_list("rt-family");
271	for (next = buf; next < lim; next += rtm->rtm_msglen) {
272		rtm = (struct rt_msghdr *)next;
273		if (rtm->rtm_version != RTM_VERSION)
274			continue;
275		/*
276		 * Peek inside header to determine AF
277		 */
278		sa = (struct sockaddr *)(rtm + 1);
279		/* Only print family first time. */
280		if (fam != sa->sa_family) {
281			if (need_table_close) {
282				xo_close_list("rt-entry");
283				xo_close_instance("rt-family");
284			}
285			need_table_close = true;
286			fam = sa->sa_family;
287			set_wid(fam);
288			xo_open_instance("rt-family");
289			pr_family(fam);
290			xo_open_list("rt-entry");
291
292			pr_rthdr(fam);
293		}
294		p_rtentry_sysctl("rt-entry", rtm);
295	}
296	if (need_table_close) {
297		xo_close_list("rt-entry");
298		xo_close_instance("rt-family");
299	}
300	xo_close_list("rt-family");
301	xo_close_container("route-table");
302	free(buf);
303}
304
305static void
306p_rtentry_sysctl(const char *name, struct rt_msghdr *rtm)
307{
308	struct sockaddr *sa, *addr[RTAX_MAX];
309	char buffer[128];
310	char prettyname[128];
311	int i, protrusion;
312
313	xo_open_instance(name);
314	sa = (struct sockaddr *)(rtm + 1);
315	for (i = 0; i < RTAX_MAX; i++) {
316		if (rtm->rtm_addrs & (1 << i)) {
317			addr[i] = sa;
318			sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa));
319		}
320	}
321
322	protrusion = p_sockaddr("destination", addr[RTAX_DST],
323	    addr[RTAX_NETMASK],
324	    rtm->rtm_flags, wid.dst);
325	protrusion = p_sockaddr("gateway", addr[RTAX_GATEWAY], NULL, RTF_HOST,
326	    wid.gw - protrusion);
327	snprintf(buffer, sizeof(buffer), "{[:-%d}{:flags/%%s}{]:} ",
328	    wid.flags - protrusion);
329	p_flags(rtm->rtm_flags, buffer);
330	/* Output path weight as non-visual property */
331	xo_emit("{e:weight/%u}", rtm->rtm_rmx.rmx_weight);
332	if (Wflag) {
333		/* XXX: use=0? */
334		xo_emit("{t:nhop/%*lu} ", wid.mtu, rtm->rtm_rmx.rmx_nhidx);
335
336		if (rtm->rtm_rmx.rmx_mtu != 0)
337			xo_emit("{t:mtu/%*lu} ", wid.mtu, rtm->rtm_rmx.rmx_mtu);
338		else
339			xo_emit("{P:/%*s} ", wid.mtu, "");
340	}
341
342	memset(prettyname, 0, sizeof(prettyname));
343	if (rtm->rtm_index < ifmap_size) {
344		strlcpy(prettyname, ifmap[rtm->rtm_index].ifname,
345		    sizeof(prettyname));
346		if (*prettyname == '\0')
347			strlcpy(prettyname, "---", sizeof(prettyname));
348	}
349
350	if (Wflag)
351		xo_emit("{t:interface-name/%*s}", wid.iface, prettyname);
352	else
353		xo_emit("{t:interface-name/%*.*s}", wid.iface, wid.iface,
354		    prettyname);
355	if (rtm->rtm_rmx.rmx_expire) {
356		time_t expire_time;
357
358		if ((expire_time = rtm->rtm_rmx.rmx_expire - uptime.tv_sec) > 0)
359			xo_emit(" {:expire-time/%*d}", wid.expire,
360			    (int)expire_time);
361	}
362
363	xo_emit("\n");
364	xo_close_instance(name);
365}
366#endif
367
368int
369p_sockaddr(const char *name, struct sockaddr *sa, struct sockaddr *mask,
370    int flags, int width)
371{
372	const char *cp;
373	char buf[128];
374	int protrusion;
375
376	cp = fmt_sockaddr(sa, mask, flags);
377
378	if (width < 0) {
379		snprintf(buf, sizeof(buf), "{:%s/%%s} ", name);
380		xo_emit(buf, cp);
381		protrusion = 0;
382	} else {
383		if (Wflag != 0 || numeric_addr) {
384			snprintf(buf, sizeof(buf), "{[:%d}{:%s/%%s}{]:} ",
385			    -width, name);
386			xo_emit(buf, cp);
387			protrusion = strlen(cp) - width;
388			if (protrusion < 0)
389				protrusion = 0;
390		} else {
391			snprintf(buf, sizeof(buf), "{[:%d}{:%s/%%-.*s}{]:} ",
392			    -width, name);
393			xo_emit(buf, width, cp);
394			protrusion = 0;
395		}
396	}
397	return (protrusion);
398}
399
400const char *
401fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags)
402{
403	static char buf[128];
404	const char *cp;
405
406	if (sa == NULL)
407		return ("null");
408
409	switch(sa->sa_family) {
410#ifdef INET6
411	case AF_INET6:
412		/*
413		 * The sa6->sin6_scope_id must be filled here because
414		 * this sockaddr is extracted from kmem(4) directly
415		 * and has KAME-specific embedded scope id in
416		 * sa6->sin6_addr.s6_addr[2].
417		 */
418		in6_fillscopeid(satosin6(sa));
419		/* FALLTHROUGH */
420#endif /*INET6*/
421	case AF_INET:
422		if (flags & RTF_HOST)
423			cp = routename(sa, numeric_addr);
424		else if (mask)
425			cp = netname(sa, mask);
426		else
427			cp = netname(sa, NULL);
428		break;
429	case AF_NETGRAPH:
430	    {
431		strlcpy(buf, ((struct sockaddr_ng *)sa)->sg_data,
432		    sizeof(buf));
433		cp = buf;
434		break;
435	    }
436	case AF_LINK:
437	    {
438#if 0
439		struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
440
441		/* Interface route. */
442		if (sdl->sdl_nlen)
443			cp = sdl->sdl_data;
444		else
445#endif
446			cp = routename(sa, 1);
447		break;
448	    }
449	default:
450	    {
451		u_char *s = (u_char *)sa->sa_data, *slim;
452		char *cq, *cqlim;
453
454		cq = buf;
455		slim =  sa->sa_len + (u_char *) sa;
456		cqlim = cq + sizeof(buf) - sizeof(" ffff");
457		snprintf(cq, sizeof(buf), "(%d)", sa->sa_family);
458		cq += strlen(cq);
459		while (s < slim && cq < cqlim) {
460			snprintf(cq, sizeof(" ff"), " %02x", *s++);
461			cq += strlen(cq);
462			if (s < slim) {
463			    snprintf(cq, sizeof("ff"), "%02x", *s++);
464			    cq += strlen(cq);
465			}
466		}
467		cp = buf;
468	    }
469	}
470
471	return (cp);
472}
473
474void
475p_flags(int f, const char *format)
476{
477
478	print_flags_generic(f, rt_bits, format, "flags_pretty");
479}
480
481
482char *
483routename(struct sockaddr *sa, int flags)
484{
485	static char line[NI_MAXHOST];
486	int error, f;
487
488	f = (flags) ? NI_NUMERICHOST : 0;
489	error = getnameinfo(sa, sa->sa_len, line, sizeof(line),
490	    NULL, 0, f);
491	if (error) {
492		const void *src;
493		switch (sa->sa_family) {
494#ifdef INET
495		case AF_INET:
496			src = &satosin(sa)->sin_addr;
497			break;
498#endif /* INET */
499#ifdef INET6
500		case AF_INET6:
501			src = &satosin6(sa)->sin6_addr;
502			break;
503#endif /* INET6 */
504		default:
505			return(line);
506		}
507		inet_ntop(sa->sa_family, src, line, sizeof(line) - 1);
508		return (line);
509	}
510	trimdomain(line, strlen(line));
511
512	return (line);
513}
514
515#define	NSHIFT(m) (							\
516	(m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT :			\
517	(m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT :			\
518	(m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT :			\
519	0)
520
521static void
522domask(char *dst, size_t buflen, u_long mask)
523{
524	int b, i;
525
526	if (mask == 0) {
527		*dst = '\0';
528		return;
529	}
530	i = 0;
531	for (b = 0; b < 32; b++)
532		if (mask & (1 << b)) {
533			int bb;
534
535			i = b;
536			for (bb = b+1; bb < 32; bb++)
537				if (!(mask & (1 << bb))) {
538					i = -1;	/* noncontig */
539					break;
540				}
541			break;
542		}
543	if (i == -1)
544		snprintf(dst, buflen, "&0x%lx", mask);
545	else
546		snprintf(dst, buflen, "/%d", 32-i);
547}
548
549/*
550 * Return the name of the network whose address is given.
551 */
552const char *
553netname(struct sockaddr *sa, struct sockaddr *mask)
554{
555	switch (sa->sa_family) {
556	case AF_INET:
557		if (mask != NULL)
558			return (netname4(satosin(sa)->sin_addr.s_addr,
559			    satosin(mask)->sin_addr.s_addr));
560		else
561			return (netname4(satosin(sa)->sin_addr.s_addr,
562			    INADDR_ANY));
563		break;
564#ifdef INET6
565	case AF_INET6:
566		return (netname6(satosin6(sa), satosin6(mask)));
567#endif /* INET6 */
568	default:
569		return (NULL);
570	}
571}
572
573static const char *
574netname4(in_addr_t in, in_addr_t mask)
575{
576	char *cp = 0;
577	static char line[MAXHOSTNAMELEN + sizeof("&0xffffffff")];
578	char nline[INET_ADDRSTRLEN];
579	struct netent *np = 0;
580	in_addr_t i;
581
582	if (in == INADDR_ANY && mask == 0) {
583		strlcpy(line, "default", sizeof(line));
584		return (line);
585	}
586
587	/* It is ok to supply host address. */
588	in &= mask;
589
590	i = ntohl(in);
591	if (!numeric_addr && i) {
592		np = getnetbyaddr(i >> NSHIFT(ntohl(mask)), AF_INET);
593		if (np != NULL) {
594			cp = np->n_name;
595			trimdomain(cp, strlen(cp));
596		}
597	}
598	if (cp != NULL)
599		strlcpy(line, cp, sizeof(line));
600	else {
601		inet_ntop(AF_INET, &in, nline, sizeof(nline));
602		strlcpy(line, nline, sizeof(line));
603		domask(line + strlen(line), sizeof(line) - strlen(line), ntohl(mask));
604	}
605
606	return (line);
607}
608
609#undef NSHIFT
610
611#ifdef INET6
612void
613in6_fillscopeid(struct sockaddr_in6 *sa6)
614{
615#if defined(__KAME__)
616	/*
617	 * XXX: This is a special workaround for KAME kernels.
618	 * sin6_scope_id field of SA should be set in the future.
619	 */
620	if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr) ||
621	    IN6_IS_ADDR_MC_NODELOCAL(&sa6->sin6_addr) ||
622	    IN6_IS_ADDR_MC_LINKLOCAL(&sa6->sin6_addr)) {
623		if (sa6->sin6_scope_id == 0)
624			sa6->sin6_scope_id =
625			    ntohs(*(u_int16_t *)&sa6->sin6_addr.s6_addr[2]);
626		sa6->sin6_addr.s6_addr[2] = sa6->sin6_addr.s6_addr[3] = 0;
627	}
628#endif
629}
630
631/* Mask to length table.  To check an invalid value, (length + 1) is used. */
632static const u_char masktolen[256] = {
633	[0xff] = 8 + 1,
634	[0xfe] = 7 + 1,
635	[0xfc] = 6 + 1,
636	[0xf8] = 5 + 1,
637	[0xf0] = 4 + 1,
638	[0xe0] = 3 + 1,
639	[0xc0] = 2 + 1,
640	[0x80] = 1 + 1,
641	[0x00] = 0 + 1,
642};
643
644static const char *
645netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask)
646{
647	static char line[NI_MAXHOST + sizeof("/xxx") - 1];
648	struct sockaddr_in6 addr;
649	char nline[NI_MAXHOST];
650	char maskbuf[sizeof("/xxx")];
651	u_char *p, *lim;
652	u_char masklen;
653	int i;
654	bool illegal = false;
655
656	if (mask) {
657		p = (u_char *)&mask->sin6_addr;
658		for (masklen = 0, lim = p + 16; p < lim; p++) {
659			if (masktolen[*p] > 0) {
660				/* -1 is required. */
661				masklen += (masktolen[*p] - 1);
662			} else
663				illegal = true;
664		}
665		if (illegal)
666			xo_error("illegal prefixlen\n");
667
668		memcpy(&addr, sa6, sizeof(addr));
669		for (i = 0; i < 16; ++i)
670			addr.sin6_addr.s6_addr[i] &=
671			    mask->sin6_addr.s6_addr[i];
672		sa6 = &addr;
673	}
674	else
675		masklen = 128;
676
677	if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
678		return("default");
679
680	getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, nline, sizeof(nline),
681	    NULL, 0, NI_NUMERICHOST);
682	if (numeric_addr)
683		strlcpy(line, nline, sizeof(line));
684	else
685		getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line,
686		    sizeof(line), NULL, 0, 0);
687	if (numeric_addr || strcmp(line, nline) == 0) {
688		snprintf(maskbuf, sizeof(maskbuf), "/%d", masklen);
689		strlcat(line, maskbuf, sizeof(line));
690	}
691
692	return (line);
693}
694#endif /*INET6*/
695
696/*
697 * Print routing statistics
698 */
699void
700rt_stats(void)
701{
702	struct rtstat rtstat;
703	u_long rtsaddr;
704
705	if ((rtsaddr = nl[N_RTSTAT].n_value) == 0) {
706		xo_emit("{W:rtstat: symbol not in namelist}\n");
707		return;
708	}
709	kread_counters(rtsaddr, (char *)&rtstat, sizeof (rtstat));
710	xo_emit("{T:routing}:\n");
711
712#define	p(f, m) if (rtstat.f || sflag <= 1) \
713	xo_emit(m, rtstat.f, plural(rtstat.f))
714
715	p(rts_badredirect, "\t{:bad-redirects/%ju} "
716	    "{N:/bad routing redirect%s}\n");
717	p(rts_dynamic, "\t{:dynamically-created/%ju} "
718	    "{N:/dynamically created route%s}\n");
719	p(rts_newgateway, "\t{:new-gateways/%ju} "
720	    "{N:/new gateway%s due to redirects}\n");
721	p(rts_unreach, "\t{:unreachable-destination/%ju} "
722	    "{N:/destination%s found unreachable}\n");
723	p(rts_wildcard, "\t{:wildcard-uses/%ju} "
724	    "{N:/use%s of a wildcard route}\n");
725#undef p
726}
727