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#if 0
33#ifndef lint
34static char sccsid[] = "From: @(#)route.c	8.6 (Berkeley) 4/28/95";
35#endif /* not lint */
36#endif
37
38#include <sys/cdefs.h>
39__FBSDID("$FreeBSD$");
40
41#include <sys/param.h>
42#include <sys/protosw.h>
43#include <sys/socket.h>
44#include <sys/socketvar.h>
45#include <sys/sysctl.h>
46#include <sys/time.h>
47
48#include <net/ethernet.h>
49#include <net/if.h>
50#include <net/if_dl.h>
51#include <net/if_types.h>
52#include <net/route.h>
53
54#include <netinet/in.h>
55#include <netgraph/ng_socket.h>
56
57#include <arpa/inet.h>
58#include <ifaddrs.h>
59#include <libutil.h>
60#include <netdb.h>
61#include <stdbool.h>
62#include <stdint.h>
63#include <stdio.h>
64#include <stdlib.h>
65#include <stdbool.h>
66#include <string.h>
67#include <sysexits.h>
68#include <unistd.h>
69#include <err.h>
70#include <libxo/xo.h>
71#include "netstat.h"
72#include "nl_defs.h"
73
74/*
75 * Definitions for showing gateway flags.
76 */
77static struct bits {
78	u_long	b_mask;
79	char	b_val;
80	const char *b_name;
81} bits[] = {
82	{ RTF_UP,	'U', "up" },
83	{ RTF_GATEWAY,	'G', "gateway" },
84	{ RTF_HOST,	'H', "host" },
85	{ RTF_REJECT,	'R', "reject" },
86	{ RTF_DYNAMIC,	'D', "dynamic" },
87	{ RTF_MODIFIED,	'M', "modified" },
88	{ RTF_DONE,	'd', "done" }, /* Completed -- for routing msgs only */
89	{ RTF_XRESOLVE,	'X', "xresolve" },
90	{ RTF_STATIC,	'S', "static" },
91	{ RTF_PROTO1,	'1', "proto1" },
92	{ RTF_PROTO2,	'2', "proto2" },
93	{ RTF_PROTO3,	'3', "proto3" },
94	{ RTF_BLACKHOLE,'B', "blackhole" },
95	{ RTF_BROADCAST,'b', "broadcast" },
96#ifdef RTF_LLINFO
97	{ RTF_LLINFO,	'L', "llinfo" },
98#endif
99	{ 0 , 0, NULL }
100};
101
102struct ifmap_entry {
103	char ifname[IFNAMSIZ];
104};
105static struct ifmap_entry *ifmap;
106static int ifmap_size;
107static struct timespec uptime;
108
109static const char *netname4(in_addr_t, in_addr_t);
110#ifdef INET6
111static const char *netname6(struct sockaddr_in6 *, struct sockaddr_in6 *);
112#endif
113static void p_rtable_sysctl(int, int);
114static void p_rtentry_sysctl(const char *name, struct rt_msghdr *);
115static int p_sockaddr(const char *name, struct sockaddr *, struct sockaddr *,
116    int, int);
117static const char *fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask,
118    int flags);
119static void p_flags(int, const char *);
120static const char *fmt_flags(int f);
121static void domask(char *, size_t, u_long);
122
123
124/*
125 * Print routing tables.
126 */
127void
128routepr(int fibnum, int af)
129{
130	size_t intsize;
131	int numfibs;
132
133	if (live == 0)
134		return;
135
136	intsize = sizeof(int);
137	if (fibnum == -1 &&
138	    sysctlbyname("net.my_fibnum", &fibnum, &intsize, NULL, 0) == -1)
139		fibnum = 0;
140	if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
141		numfibs = 1;
142	if (fibnum < 0 || fibnum > numfibs - 1)
143		errx(EX_USAGE, "%d: invalid fib", fibnum);
144	/*
145	 * Since kernel & userland use different timebase
146	 * (time_uptime vs time_second) and we are reading kernel memory
147	 * directly we should do rt_expire --> expire_time conversion.
148	 */
149	if (clock_gettime(CLOCK_UPTIME, &uptime) < 0)
150		err(EX_OSERR, "clock_gettime() failed");
151
152	xo_open_container("route-information");
153	xo_emit("{T:Routing tables}");
154	if (fibnum)
155		xo_emit(" ({L:fib}: {:fib/%d})", fibnum);
156	xo_emit("\n");
157	p_rtable_sysctl(fibnum, af);
158	xo_close_container("route-information");
159}
160
161
162/*
163 * Print address family header before a section of the routing table.
164 */
165void
166pr_family(int af1)
167{
168	const char *afname;
169
170	switch (af1) {
171	case AF_INET:
172		afname = "Internet";
173		break;
174#ifdef INET6
175	case AF_INET6:
176		afname = "Internet6";
177		break;
178#endif /*INET6*/
179	case AF_ISO:
180		afname = "ISO";
181		break;
182	case AF_CCITT:
183		afname = "X.25";
184		break;
185	case AF_NETGRAPH:
186		afname = "Netgraph";
187		break;
188	default:
189		afname = NULL;
190		break;
191	}
192	if (afname)
193		xo_emit("\n{k:address-family/%s}:\n", afname);
194	else
195		xo_emit("\n{L:Protocol Family} {k:address-family/%d}:\n", af1);
196}
197
198/* column widths; each followed by one space */
199#ifndef INET6
200#define	WID_DST_DEFAULT(af) 	18	/* width of destination column */
201#define	WID_GW_DEFAULT(af)	18	/* width of gateway column */
202#define	WID_IF_DEFAULT(af)	(Wflag ? 10 : 8) /* width of netif column */
203#else
204#define	WID_DST_DEFAULT(af) \
205	((af) == AF_INET6 ? (numeric_addr ? 33: 18) : 18)
206#define	WID_GW_DEFAULT(af) \
207	((af) == AF_INET6 ? (numeric_addr ? 29 : 18) : 18)
208#define	WID_IF_DEFAULT(af)	((af) == AF_INET6 ? 8 : (Wflag ? 10 : 8))
209#endif /*INET6*/
210
211static int wid_dst;
212static int wid_gw;
213static int wid_flags;
214static int wid_pksent;
215static int wid_mtu;
216static int wid_if;
217static int wid_expire;
218
219/*
220 * Print header for routing table columns.
221 */
222static void
223pr_rthdr(int af1 __unused)
224{
225
226	if (Wflag) {
227		xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
228		    "{T:/%*.*s} {T:/%*.*s} {T:/%*s}\n",
229			wid_dst,	wid_dst,	"Destination",
230			wid_gw,		wid_gw,		"Gateway",
231			wid_flags,	wid_flags,	"Flags",
232			wid_pksent,	wid_pksent,	"Use",
233			wid_mtu,	wid_mtu,	"Mtu",
234			wid_if,		wid_if,		"Netif",
235			wid_expire,			"Expire");
236	} else {
237		xo_emit("{T:/%-*.*s} {T:/%-*.*s} {T:/%-*.*s} {T:/%*.*s} "
238		    "{T:/%*s}\n",
239			wid_dst,	wid_dst,	"Destination",
240			wid_gw,		wid_gw,		"Gateway",
241			wid_flags,	wid_flags,	"Flags",
242			wid_if,		wid_if,		"Netif",
243			wid_expire,			"Expire");
244	}
245}
246
247static void
248p_rtable_sysctl(int fibnum, int af)
249{
250	size_t needed;
251	int mib[7];
252	char *buf, *next, *lim;
253	struct rt_msghdr *rtm;
254	struct sockaddr *sa;
255	int fam = AF_UNSPEC, ifindex = 0, size;
256	int need_table_close = false;
257
258	struct ifaddrs *ifap, *ifa;
259	struct sockaddr_dl *sdl;
260
261	/*
262	 * Retrieve interface list at first
263	 * since we need #ifindex -> if_xname match
264	 */
265	if (getifaddrs(&ifap) != 0)
266		err(EX_OSERR, "getifaddrs");
267
268	for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
269
270		if (ifa->ifa_addr->sa_family != AF_LINK)
271			continue;
272
273		sdl = (struct sockaddr_dl *)ifa->ifa_addr;
274		ifindex = sdl->sdl_index;
275
276		if (ifindex >= ifmap_size) {
277			size = roundup(ifindex + 1, 32) *
278			    sizeof(struct ifmap_entry);
279			if ((ifmap = realloc(ifmap, size)) == NULL)
280				errx(2, "realloc(%d) failed", size);
281			memset(&ifmap[ifmap_size], 0,
282			    size - ifmap_size *
283			    sizeof(struct ifmap_entry));
284
285			ifmap_size = roundup(ifindex + 1, 32);
286		}
287
288		if (*ifmap[ifindex].ifname != '\0')
289			continue;
290
291		strlcpy(ifmap[ifindex].ifname, ifa->ifa_name, IFNAMSIZ);
292	}
293
294	freeifaddrs(ifap);
295
296	mib[0] = CTL_NET;
297	mib[1] = PF_ROUTE;
298	mib[2] = 0;
299	mib[3] = af;
300	mib[4] = NET_RT_DUMP;
301	mib[5] = 0;
302	mib[6] = fibnum;
303	if (sysctl(mib, nitems(mib), NULL, &needed, NULL, 0) < 0)
304		err(EX_OSERR, "sysctl: net.route.0.%d.dump.%d estimate", af,
305		    fibnum);
306	if ((buf = malloc(needed)) == NULL)
307		errx(2, "malloc(%lu)", (unsigned long)needed);
308	if (sysctl(mib, nitems(mib), buf, &needed, NULL, 0) < 0)
309		err(1, "sysctl: net.route.0.%d.dump.%d", af, fibnum);
310	lim  = buf + needed;
311	xo_open_container("route-table");
312	xo_open_list("rt-family");
313	for (next = buf; next < lim; next += rtm->rtm_msglen) {
314		rtm = (struct rt_msghdr *)next;
315		if (rtm->rtm_version != RTM_VERSION)
316			continue;
317		/*
318		 * Peek inside header to determine AF
319		 */
320		sa = (struct sockaddr *)(rtm + 1);
321		/* Only print family first time. */
322		if (fam != sa->sa_family) {
323			if (need_table_close) {
324				xo_close_list("rt-entry");
325				xo_close_instance("rt-family");
326			}
327			need_table_close = true;
328
329			fam = sa->sa_family;
330			wid_dst = WID_DST_DEFAULT(fam);
331			wid_gw = WID_GW_DEFAULT(fam);
332			wid_flags = 6;
333			wid_pksent = 8;
334			wid_mtu = 6;
335			wid_if = WID_IF_DEFAULT(fam);
336			wid_expire = 6;
337			xo_open_instance("rt-family");
338			pr_family(fam);
339			xo_open_list("rt-entry");
340
341			pr_rthdr(fam);
342		}
343		p_rtentry_sysctl("rt-entry", rtm);
344	}
345	if (need_table_close) {
346		xo_close_list("rt-entry");
347		xo_close_instance("rt-family");
348	}
349	xo_close_list("rt-family");
350	xo_close_container("route-table");
351	free(buf);
352}
353
354static void
355p_rtentry_sysctl(const char *name, struct rt_msghdr *rtm)
356{
357	struct sockaddr *sa, *addr[RTAX_MAX];
358	char buffer[128];
359	char prettyname[128];
360	int i, protrusion;
361
362	xo_open_instance(name);
363	sa = (struct sockaddr *)(rtm + 1);
364	for (i = 0; i < RTAX_MAX; i++) {
365		if (rtm->rtm_addrs & (1 << i)) {
366			addr[i] = sa;
367			sa = (struct sockaddr *)((char *)sa + SA_SIZE(sa));
368		}
369	}
370
371	protrusion = p_sockaddr("destination", addr[RTAX_DST],
372	    addr[RTAX_NETMASK],
373	    rtm->rtm_flags, wid_dst);
374	protrusion = p_sockaddr("gateway", addr[RTAX_GATEWAY], NULL, RTF_HOST,
375	    wid_gw - protrusion);
376	snprintf(buffer, sizeof(buffer), "{[:-%d}{:flags/%%s}{]:} ",
377	    wid_flags - protrusion);
378	p_flags(rtm->rtm_flags, buffer);
379	if (Wflag) {
380		xo_emit("{t:use/%*lu} ", wid_pksent, rtm->rtm_rmx.rmx_pksent);
381
382		if (rtm->rtm_rmx.rmx_mtu != 0)
383			xo_emit("{t:mtu/%*lu} ", wid_mtu, rtm->rtm_rmx.rmx_mtu);
384		else
385			xo_emit("{P:/%*s} ", wid_mtu, "");
386	}
387
388	memset(prettyname, 0, sizeof(prettyname));
389	if (rtm->rtm_index < ifmap_size) {
390		strlcpy(prettyname, ifmap[rtm->rtm_index].ifname,
391		    sizeof(prettyname));
392		if (*prettyname == '\0')
393			strlcpy(prettyname, "---", sizeof(prettyname));
394	}
395
396	if (Wflag)
397		xo_emit("{t:interface-name/%*s}", wid_if, prettyname);
398	else
399		xo_emit("{t:interface-name/%*.*s}", wid_if, wid_if,
400		    prettyname);
401	if (rtm->rtm_rmx.rmx_expire) {
402		time_t expire_time;
403
404		if ((expire_time = rtm->rtm_rmx.rmx_expire - uptime.tv_sec) > 0)
405			xo_emit(" {:expire-time/%*d}", wid_expire,
406			    (int)expire_time);
407	}
408
409	xo_emit("\n");
410	xo_close_instance(name);
411}
412
413static int
414p_sockaddr(const char *name, struct sockaddr *sa, struct sockaddr *mask,
415    int flags, int width)
416{
417	const char *cp;
418	char buf[128];
419	int protrusion;
420
421	cp = fmt_sockaddr(sa, mask, flags);
422
423	if (width < 0) {
424		snprintf(buf, sizeof(buf), "{:%s/%%s} ", name);
425		xo_emit(buf, cp);
426		protrusion = 0;
427	} else {
428		if (Wflag != 0 || numeric_addr) {
429			snprintf(buf, sizeof(buf), "{[:%d}{:%s/%%s}{]:} ",
430			    -width, name);
431			xo_emit(buf, cp);
432			protrusion = strlen(cp) - width;
433			if (protrusion < 0)
434				protrusion = 0;
435		} else {
436			snprintf(buf, sizeof(buf), "{[:%d}{:%s/%%-.*s}{]:} ",
437			    -width, name);
438			xo_emit(buf, width, cp);
439			protrusion = 0;
440		}
441	}
442	return (protrusion);
443}
444
445static const char *
446fmt_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags)
447{
448	static char buf[128];
449	const char *cp;
450
451	if (sa == NULL)
452		return ("null");
453
454	switch(sa->sa_family) {
455#ifdef INET6
456	case AF_INET6:
457		/*
458		 * The sa6->sin6_scope_id must be filled here because
459		 * this sockaddr is extracted from kmem(4) directly
460		 * and has KAME-specific embedded scope id in
461		 * sa6->sin6_addr.s6_addr[2].
462		 */
463		in6_fillscopeid(satosin6(sa));
464		/* FALLTHROUGH */
465#endif /*INET6*/
466	case AF_INET:
467		if (flags & RTF_HOST)
468			cp = routename(sa, numeric_addr);
469		else if (mask)
470			cp = netname(sa, mask);
471		else
472			cp = netname(sa, NULL);
473		break;
474	case AF_NETGRAPH:
475	    {
476		strlcpy(buf, ((struct sockaddr_ng *)sa)->sg_data,
477		    sizeof(buf));
478		cp = buf;
479		break;
480	    }
481	case AF_LINK:
482	    {
483#if 0
484		struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
485
486		/* Interface route. */
487		if (sdl->sdl_nlen)
488			cp = sdl->sdl_data;
489		else
490#endif
491			cp = routename(sa, 1);
492		break;
493	    }
494	default:
495	    {
496		u_char *s = (u_char *)sa->sa_data, *slim;
497		char *cq, *cqlim;
498
499		cq = buf;
500		slim =  sa->sa_len + (u_char *) sa;
501		cqlim = cq + sizeof(buf) - sizeof(" ffff");
502		snprintf(cq, sizeof(buf), "(%d)", sa->sa_family);
503		cq += strlen(cq);
504		while (s < slim && cq < cqlim) {
505			snprintf(cq, sizeof(" ff"), " %02x", *s++);
506			cq += strlen(cq);
507			if (s < slim) {
508			    snprintf(cq, sizeof("ff"), "%02x", *s++);
509			    cq += strlen(cq);
510			}
511		}
512		cp = buf;
513	    }
514	}
515
516	return (cp);
517}
518
519static void
520p_flags(int f, const char *format)
521{
522	struct bits *p;
523
524	xo_emit(format, fmt_flags(f));
525
526	xo_open_list("flags_pretty");
527	for (p = bits; p->b_mask; p++)
528		if (p->b_mask & f)
529			xo_emit("{le:flags_pretty/%s}", p->b_name);
530	xo_close_list("flags_pretty");
531}
532
533static const char *
534fmt_flags(int f)
535{
536	static char name[33];
537	char *flags;
538	struct bits *p = bits;
539
540	for (flags = name; p->b_mask; p++)
541		if (p->b_mask & f)
542			*flags++ = p->b_val;
543	*flags = '\0';
544	return (name);
545}
546
547char *
548routename(struct sockaddr *sa, int flags)
549{
550	static char line[NI_MAXHOST];
551	int error, f;
552
553	f = (flags) ? NI_NUMERICHOST : 0;
554	error = getnameinfo(sa, sa->sa_len, line, sizeof(line),
555	    NULL, 0, f);
556	if (error) {
557		const void *src;
558		switch (sa->sa_family) {
559#ifdef INET
560		case AF_INET:
561			src = &satosin(sa)->sin_addr;
562			break;
563#endif /* INET */
564#ifdef INET6
565		case AF_INET6:
566			src = &satosin6(sa)->sin6_addr;
567			break;
568#endif /* INET6 */
569		default:
570			return(line);
571		}
572		inet_ntop(sa->sa_family, src, line, sizeof(line) - 1);
573		return (line);
574	}
575	trimdomain(line, strlen(line));
576
577	return (line);
578}
579
580#define	NSHIFT(m) (							\
581	(m) == IN_CLASSA_NET ? IN_CLASSA_NSHIFT :			\
582	(m) == IN_CLASSB_NET ? IN_CLASSB_NSHIFT :			\
583	(m) == IN_CLASSC_NET ? IN_CLASSC_NSHIFT :			\
584	0)
585
586static void
587domask(char *dst, size_t buflen, u_long mask)
588{
589	int b, i;
590
591	if (mask == 0) {
592		*dst = '\0';
593		return;
594	}
595	i = 0;
596	for (b = 0; b < 32; b++)
597		if (mask & (1 << b)) {
598			int bb;
599
600			i = b;
601			for (bb = b+1; bb < 32; bb++)
602				if (!(mask & (1 << bb))) {
603					i = -1;	/* noncontig */
604					break;
605				}
606			break;
607		}
608	if (i == -1)
609		snprintf(dst, buflen, "&0x%lx", mask);
610	else
611		snprintf(dst, buflen, "/%d", 32-i);
612}
613
614/*
615 * Return the name of the network whose address is given.
616 */
617const char *
618netname(struct sockaddr *sa, struct sockaddr *mask)
619{
620	switch (sa->sa_family) {
621	case AF_INET:
622		if (mask != NULL)
623			return (netname4(satosin(sa)->sin_addr.s_addr,
624			    satosin(mask)->sin_addr.s_addr));
625		else
626			return (netname4(satosin(sa)->sin_addr.s_addr,
627			    INADDR_ANY));
628		break;
629#ifdef INET6
630	case AF_INET6:
631		return (netname6(satosin6(sa), satosin6(mask)));
632#endif /* INET6 */
633	default:
634		return (NULL);
635	}
636}
637
638static const char *
639netname4(in_addr_t in, in_addr_t mask)
640{
641	char *cp = 0;
642	static char line[MAXHOSTNAMELEN + sizeof("&0xffffffff")];
643	char nline[INET_ADDRSTRLEN];
644	struct netent *np = 0;
645	in_addr_t i;
646
647	if (in == INADDR_ANY && mask == 0) {
648		strlcpy(line, "default", sizeof(line));
649		return (line);
650	}
651
652	/* It is ok to supply host address. */
653	in &= mask;
654
655	i = ntohl(in);
656	if (!numeric_addr && i) {
657		np = getnetbyaddr(i >> NSHIFT(ntohl(mask)), AF_INET);
658		if (np != NULL) {
659			cp = np->n_name;
660			trimdomain(cp, strlen(cp));
661		}
662	}
663	if (cp != NULL)
664		strlcpy(line, cp, sizeof(line));
665	else {
666		inet_ntop(AF_INET, &in, nline, sizeof(nline));
667		strlcpy(line, nline, sizeof(line));
668		domask(line + strlen(line), sizeof(line) - strlen(line), ntohl(mask));
669	}
670
671	return (line);
672}
673
674#undef NSHIFT
675
676#ifdef INET6
677void
678in6_fillscopeid(struct sockaddr_in6 *sa6)
679{
680#if defined(__KAME__)
681	/*
682	 * XXX: This is a special workaround for KAME kernels.
683	 * sin6_scope_id field of SA should be set in the future.
684	 */
685	if (IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr) ||
686	    IN6_IS_ADDR_MC_NODELOCAL(&sa6->sin6_addr) ||
687	    IN6_IS_ADDR_MC_LINKLOCAL(&sa6->sin6_addr)) {
688		if (sa6->sin6_scope_id == 0)
689			sa6->sin6_scope_id =
690			    ntohs(*(u_int16_t *)&sa6->sin6_addr.s6_addr[2]);
691		sa6->sin6_addr.s6_addr[2] = sa6->sin6_addr.s6_addr[3] = 0;
692	}
693#endif
694}
695
696/* Mask to length table.  To check an invalid value, (length + 1) is used. */
697static const u_char masktolen[256] = {
698	[0xff] = 8 + 1,
699	[0xfe] = 7 + 1,
700	[0xfc] = 6 + 1,
701	[0xf8] = 5 + 1,
702	[0xf0] = 4 + 1,
703	[0xe0] = 3 + 1,
704	[0xc0] = 2 + 1,
705	[0x80] = 1 + 1,
706	[0x00] = 0 + 1,
707};
708
709static const char *
710netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask)
711{
712	static char line[NI_MAXHOST + sizeof("/xxx") - 1];
713	struct sockaddr_in6 addr;
714	char nline[NI_MAXHOST];
715	char maskbuf[sizeof("/xxx")];
716	u_char *p, *lim;
717	u_char masklen;
718	int i;
719	bool illegal = false;
720
721	if (mask) {
722		p = (u_char *)&mask->sin6_addr;
723		for (masklen = 0, lim = p + 16; p < lim; p++) {
724			if (masktolen[*p] > 0) {
725				/* -1 is required. */
726				masklen += (masktolen[*p] - 1);
727			} else
728				illegal = true;
729		}
730		if (illegal)
731			xo_error("illegal prefixlen\n");
732
733		memcpy(&addr, sa6, sizeof(addr));
734		for (i = 0; i < 16; ++i)
735			addr.sin6_addr.s6_addr[i] &=
736			    mask->sin6_addr.s6_addr[i];
737		sa6 = &addr;
738	}
739	else
740		masklen = 128;
741
742	if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sa6->sin6_addr))
743		return("default");
744
745	getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, nline, sizeof(nline),
746	    NULL, 0, NI_NUMERICHOST);
747	if (numeric_addr)
748		strlcpy(line, nline, sizeof(line));
749	else
750		getnameinfo((struct sockaddr *)sa6, sa6->sin6_len, line,
751		    sizeof(line), NULL, 0, 0);
752	if (numeric_addr || strcmp(line, nline) == 0) {
753		snprintf(maskbuf, sizeof(maskbuf), "/%d", masklen);
754		strlcat(line, maskbuf, sizeof(line));
755	}
756
757	return (line);
758}
759#endif /*INET6*/
760
761/*
762 * Print routing statistics
763 */
764void
765rt_stats(void)
766{
767	struct rtstat rtstat;
768	u_long rtsaddr, rttaddr;
769	int rttrash;
770
771	if ((rtsaddr = nl[N_RTSTAT].n_value) == 0) {
772		xo_emit("{W:rtstat: symbol not in namelist}\n");
773		return;
774	}
775	if ((rttaddr = nl[N_RTTRASH].n_value) == 0) {
776		xo_emit("{W:rttrash: symbol not in namelist}\n");
777		return;
778	}
779	kread_counters(rtsaddr, (char *)&rtstat, sizeof (rtstat));
780	kread(rttaddr, (char *)&rttrash, sizeof (rttrash));
781	xo_emit("{T:routing}:\n");
782
783#define	p(f, m) if (rtstat.f || sflag <= 1) \
784	xo_emit(m, rtstat.f, plural(rtstat.f))
785
786	p(rts_badredirect, "\t{:bad-redirects/%ju} "
787	    "{N:/bad routing redirect%s}\n");
788	p(rts_dynamic, "\t{:dynamically-created/%ju} "
789	    "{N:/dynamically created route%s}\n");
790	p(rts_newgateway, "\t{:new-gateways/%ju} "
791	    "{N:/new gateway%s due to redirects}\n");
792	p(rts_unreach, "\t{:unreachable-destination/%ju} "
793	    "{N:/destination%s found unreachable}\n");
794	p(rts_wildcard, "\t{:wildcard-uses/%ju} "
795	    "{N:/use%s of a wildcard route}\n");
796#undef p
797
798	if (rttrash || sflag <= 1)
799		xo_emit("\t{:unused-but-not-freed/%u} "
800		    "{N:/route%s not in table but not freed}\n",
801		    rttrash, plural(rttrash));
802}
803