GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: sbin/route/show.c Lines: 203 330 61.5 %
Date: 2017-11-13 Branches: 120 239 50.2 %

Line Branch Exec Source
1
/*	$OpenBSD: show.c,v 1.108 2016/12/13 08:40:54 mpi Exp $	*/
2
/*	$NetBSD: show.c,v 1.1 1996/11/15 18:01:41 gwr Exp $	*/
3
4
/*
5
 * Copyright (c) 1983, 1988, 1993
6
 *	The Regents of the University of California.  All rights reserved.
7
 *
8
 * Redistribution and use in source and binary forms, with or without
9
 * modification, are permitted provided that the following conditions
10
 * are met:
11
 * 1. Redistributions of source code must retain the above copyright
12
 *    notice, this list of conditions and the following disclaimer.
13
 * 2. Redistributions in binary form must reproduce the above copyright
14
 *    notice, this list of conditions and the following disclaimer in the
15
 *    documentation and/or other materials provided with the distribution.
16
 * 3. Neither the name of the University nor the names of its contributors
17
 *    may be used to endorse or promote products derived from this software
18
 *    without specific prior written permission.
19
 *
20
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30
 * SUCH DAMAGE.
31
 */
32
33
#include <sys/socket.h>
34
#include <sys/sysctl.h>
35
36
#include <net/if.h>
37
#include <net/if_dl.h>
38
#include <net/if_types.h>
39
#include <net/route.h>
40
#include <netinet/in.h>
41
#include <netinet/if_ether.h>
42
#include <netmpls/mpls.h>
43
#include <arpa/inet.h>
44
45
#include <err.h>
46
#include <errno.h>
47
#include <netdb.h>
48
#include <stdio.h>
49
#include <stddef.h>
50
#include <stdlib.h>
51
#include <string.h>
52
#include <unistd.h>
53
#include <limits.h>
54
55
#include "show.h"
56
57
char	*any_ntoa(const struct sockaddr *);
58
char	*link_print(struct sockaddr *);
59
char	*label_print(struct sockaddr *);
60
61
#define ROUNDUP(a) \
62
	((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
63
#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
64
65
/*
66
 * Definitions for showing gateway flags.
67
 */
68
struct bits {
69
	int	b_mask;
70
	char	b_val;
71
};
72
static const struct bits bits[] = {
73
	{ RTF_UP,	'U' },
74
	{ RTF_GATEWAY,	'G' },
75
	{ RTF_HOST,	'H' },
76
	{ RTF_REJECT,	'R' },
77
	{ RTF_DYNAMIC,	'D' },
78
	{ RTF_MODIFIED,	'M' },
79
	{ RTF_DONE,	'd' }, /* Completed -- for routing messages only */
80
	{ RTF_CLONING,	'C' },
81
	{ RTF_MULTICAST,'m' },
82
	{ RTF_LLINFO,	'L' },
83
	{ RTF_STATIC,	'S' },
84
	{ RTF_BLACKHOLE,'B' },
85
	{ RTF_PROTO3,	'3' },
86
	{ RTF_PROTO2,	'2' },
87
	{ RTF_PROTO1,	'1' },
88
	{ RTF_CLONED,	'c' },
89
	{ RTF_CACHED,	'h' },
90
	{ RTF_MPATH,	'P' },
91
	{ RTF_MPLS,	'T' },
92
	{ RTF_LOCAL,	'l' },
93
	{ RTF_BFD,	'F' },
94
	{ RTF_BROADCAST,'b' },
95
	{ RTF_CONNECTED,'n' },
96
	{ 0 }
97
};
98
99
int	 WID_DST(int);
100
void	 pr_rthdr(int);
101
void	 p_rtentry(struct rt_msghdr *);
102
void	 pr_family(int);
103
void	 p_sockaddr_mpls(struct sockaddr *, struct sockaddr *, int, int);
104
void	 p_flags(int, char *);
105
char	*routename4(in_addr_t);
106
char	*routename6(struct sockaddr_in6 *);
107
char	*netname4(in_addr_t, struct sockaddr_in *);
108
char	*netname6(struct sockaddr_in6 *, struct sockaddr_in6 *);
109
110
/*
111
 * Print routing tables.
112
 */
113
void
114
p_rttables(int af, u_int tableid, int hastable, char prio)
115
{
116
	struct rt_msghdr *rtm;
117
	char *buf = NULL, *next, *lim = NULL;
118
300
	size_t needed;
119
150
	int mib[7], mcnt;
120
	struct sockaddr *sa;
121
122
150
	mib[0] = CTL_NET;
123
150
	mib[1] = PF_ROUTE;
124
150
	mib[2] = 0;
125
150
	mib[3] = af;
126
150
	mib[4] = NET_RT_DUMP;
127
150
	mib[5] = prio;
128
150
	if (hastable) {
129
150
		mib[6] = tableid;
130
		mcnt = 7;
131
150
	} else
132
		mcnt = 6;
133
134
150
	while (1) {
135
150
		if (sysctl(mib, mcnt, NULL, &needed, NULL, 0) == -1)
136
			err(1, "route-sysctl-estimate");
137
150
		if (needed == 0)
138
			break;
139
150
		if ((buf = realloc(buf, needed)) == NULL)
140
			err(1, NULL);
141
150
		if (sysctl(mib, mcnt, buf, &needed, NULL, 0) == -1) {
142
			if (errno == ENOMEM)
143
				continue;
144
			err(1, "sysctl of routing table");
145
		}
146
150
		lim = buf + needed;
147
150
		break;
148
	}
149
150
150
	if (pledge("stdio rpath dns flock cpath wpath", NULL) == -1)
151
		err(1, "pledge");
152
153
150
	printf("Routing tables\n");
154
155
150
	if (buf) {
156
2496
		for (next = buf; next < lim; next += rtm->rtm_msglen) {
157
1098
			rtm = (struct rt_msghdr *)next;
158
1098
			if (rtm->rtm_version != RTM_VERSION)
159
				continue;
160
1098
			sa = (struct sockaddr *)(next + rtm->rtm_hdrlen);
161
1098
			p_rtentry(rtm);
162
1098
		}
163
150
		free(buf);
164
		buf = NULL;
165
150
	}
166
150
}
167
168
/*
169
 * column widths; each followed by one space
170
 * width of destination/gateway column
171
 * strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4
172
 */
173
#define	WID_GW(af)	((af) == AF_INET6 ? (nflag ? 30 : 18) : 18)
174
175
int
176
WID_DST(int af)
177
{
178
179
4992
	if (nflag)
180
2496
		switch (af) {
181
		case AF_MPLS:
182
			return 9;
183
		case AF_INET6:
184
336
			return 34;
185
		default:
186
2160
			return 18;
187
		}
188
	else
189
		switch (af) {
190
		case AF_MPLS:
191
			return 9;
192
 		default:
193
			return 18;
194
		}
195
2496
}
196
197
/*
198
 * Print header for routing table columns.
199
 */
200
void
201
pr_rthdr(int af)
202
{
203
300
	switch (af) {
204
	case PF_KEY:
205
		printf("%-18s %-5s %-18s %-5s %-5s %-22s\n",
206
		    "Source", "Port", "Destination",
207
		    "Port", "Proto", "SA(Address/Proto/Type/Direction)");
208
		break;
209
	case PF_MPLS:
210
		printf("%-9s %-9s %-6s %-18s %-6.6s %5.5s %8.8s %5.5s  %4.4s %s\n",
211
		    "In label", "Out label", "Op", "Gateway",
212
		    "Flags", "Refs", "Use", "Mtu", "Prio", "Interface");
213
		break;
214
	default:
215
150
		printf("%-*.*s %-*.*s %-6.6s %5.5s %8.8s %5.5s  %4.4s %s",
216
150
		    WID_DST(af), WID_DST(af), "Destination",
217

474
		    WID_GW(af), WID_GW(af), "Gateway",
218
		    "Flags", "Refs", "Use", "Mtu", "Prio", "Iface");
219
150
		if (verbose)
220
			printf(" %s", "Label");
221
300
		putchar('\n');
222
		break;
223
	}
224
150
}
225
226
void
227
get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
228
{
229
	int	i;
230
231
36234
	for (i = 0; i < RTAX_MAX; i++) {
232
16470
		if (addrs & (1 << i)) {
233
5490
			rti_info[i] = sa;
234
10980
			sa = (struct sockaddr *)((char *)(sa) +
235
16470
			    ROUNDUP(sa->sa_len));
236
5490
		} else
237
10980
			rti_info[i] = NULL;
238
	}
239
1098
}
240
241
/*
242
 * Print a routing table entry.
243
 */
244
void
245
p_rtentry(struct rt_msghdr *rtm)
246
{
247
	static int	 old_af = -1;
248
2196
	struct sockaddr	*sa = (struct sockaddr *)((char *)rtm + rtm->rtm_hdrlen);
249
1098
	struct sockaddr	*mask, *rti_info[RTAX_MAX];
250
1098
	char		 ifbuf[IF_NAMESIZE];
251
	char		*label;
252
253
1098
	if (sa->sa_family == AF_KEY)
254
		return;
255
256
1098
	get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
257
258

1200
	if (Fflag && rti_info[RTAX_GATEWAY]->sa_family != sa->sa_family) {
259
		return;
260
	}
261
262
1098
	if (strlen(so_label.rtlabel.sr_label)) {
263
		if (!rti_info[RTAX_LABEL])
264
			return;
265
		label = ((struct sockaddr_rtlabel *)rti_info[RTAX_LABEL])->
266
		    sr_label;
267
		if (strcmp(label, so_label.rtlabel.sr_label))
268
			return;
269
	}
270
271
1098
	if (old_af != sa->sa_family) {
272
150
		old_af = sa->sa_family;
273
150
		pr_family(sa->sa_family);
274
150
		pr_rthdr(sa->sa_family);
275
150
	}
276
277
1098
	mask = rti_info[RTAX_NETMASK];
278
1098
	if ((sa = rti_info[RTAX_DST]) == NULL)
279
		return;
280
281
1098
	p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family));
282
2196
	p_sockaddr_mpls(sa, rti_info[RTAX_SRC], rtm->rtm_mpls,
283
1098
	    WID_DST(sa->sa_family));
284
285
2196
	p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST,
286
2352
	    WID_GW(sa->sa_family));
287
288
1098
	p_flags(rtm->rtm_flags, "%-6.6s ");
289
2196
	printf("%5u %8llu ", rtm->rtm_rmx.rmx_refcnt,
290
1098
	    rtm->rtm_rmx.rmx_pksent);
291
1098
	if (rtm->rtm_rmx.rmx_mtu)
292
1026
		printf("%5u ", rtm->rtm_rmx.rmx_mtu);
293
	else
294
72
		printf("%5s ", "-");
295
2196
	putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' ');
296
2196
	printf("  %2d %-5.16s", rtm->rtm_priority,
297
1098
	    if_indextoname(rtm->rtm_index, ifbuf));
298

1098
	if (verbose && rti_info[RTAX_LABEL])
299
		printf(" %s", routename(rti_info[RTAX_LABEL]));
300
2196
	putchar('\n');
301
2196
}
302
303
/*
304
 * Print address family header before a section of the routing table.
305
 */
306
void
307
pr_family(int af)
308
{
309
	char *afname;
310
311

300
	switch (af) {
312
	case AF_INET:
313
		afname = "Internet";
314
138
		break;
315
	case AF_INET6:
316
		afname = "Internet6";
317
12
		break;
318
	case PF_KEY:
319
		afname = "Encap";
320
		break;
321
	case AF_MPLS:
322
		afname = "MPLS";
323
		break;
324
	default:
325
		afname = NULL;
326
		break;
327
	}
328
150
	if (afname)
329
150
		printf("\n%s:\n", afname);
330
	else
331
		printf("\nProtocol Family %d:\n", af);
332
150
}
333
334
void
335
p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width)
336
{
337
	char *cp;
338
339
4392
	switch (sa->sa_family) {
340
	case AF_INET6:
341
	    {
342
312
		struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
343
312
		struct in6_addr *in6 = &sa6->sin6_addr;
344
345
		/*
346
		 * XXX: This is a special workaround for KAME kernels.
347
		 * sin6_scope_id field of SA should be set in the future.
348
		 */
349

420
		if (IN6_IS_ADDR_LINKLOCAL(in6) ||
350

312
		    IN6_IS_ADDR_MC_LINKLOCAL(in6) ||
351
240
		    IN6_IS_ADDR_MC_INTFACELOCAL(in6)) {
352
			/* XXX: override is ok? */
353
144
			sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)
354
			    &in6->s6_addr[2]);
355
144
			*(u_short *)&in6->s6_addr[2] = 0;
356
144
		}
357
312
		if (flags & RTF_HOST)
358
240
			cp = routename((struct sockaddr *)sa6);
359
		else
360
72
			cp = netname((struct sockaddr *)sa6, mask);
361
		break;
362
	    }
363
	case AF_MPLS:
364
		return;
365
	default:
366
1884
		if ((flags & RTF_HOST) || mask == NULL)
367
1542
			cp = routename(sa);
368
		else
369
342
			cp = netname(sa, mask);
370
		break;
371
	}
372
2196
	if (width < 0)
373
		printf("%s", cp);
374
	else {
375
2196
		if (nflag)
376
2196
			printf("%-*s ", width, cp);
377
		else
378
			printf("%-*.*s ", width, width, cp);
379
	}
380
4392
}
381
382
static char line[HOST_NAME_MAX+1];
383
static char domain[HOST_NAME_MAX+1];
384
385
void
386
p_sockaddr_mpls(struct sockaddr *in, struct sockaddr *out, int flags, int width)
387
{
388
2196
	if (in->sa_family != AF_MPLS)
389
		return;
390
391
	if (flags & MPLS_OP_POP || flags == MPLS_OP_LOCAL) {
392
		printf("%-*s ", width, label_print(in));
393
		printf("%-*s ", width, label_print(NULL));
394
	} else {
395
		printf("%-*s ", width, label_print(in));
396
		printf("%-*s ", width, label_print(out));
397
	}
398
399
	printf("%-6s ", mpls_op(flags));
400
1098
}
401
402
void
403
p_flags(int f, char *format)
404
{
405
2196
	char name[33], *flags;
406
	const struct bits *p = bits;
407
408
52704
	for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++)
409
25254
		if (p->b_mask & f)
410
3570
			*flags++ = p->b_val;
411
1098
	*flags = '\0';
412
1098
	printf(format, name);
413
1098
}
414
415
char *
416
routename(struct sockaddr *sa)
417
{
418
	char *cp = NULL;
419
	static int first = 1;
420
421
3624
	if (first) {
422
156
		first = 0;
423

312
		if (gethostname(domain, sizeof(domain)) == 0 &&
424
156
		    (cp = strchr(domain, '.')))
425
156
			(void)strlcpy(domain, cp + 1, sizeof(domain));
426
		else
427
			domain[0] = '\0';
428
		cp = NULL;
429
156
	}
430
431
1812
	if (sa->sa_len == 0) {
432
		(void)strlcpy(line, "default", sizeof(line));
433
		return (line);
434
	}
435
436

1812
	switch (sa->sa_family) {
437
	case AF_INET:
438
1518
		return
439
1518
		    (routename4(((struct sockaddr_in *)sa)->sin_addr.s_addr));
440
441
	case AF_INET6:
442
	    {
443
270
		struct sockaddr_in6 sin6;
444
445
270
		memset(&sin6, 0, sizeof(sin6));
446
270
		memcpy(&sin6, sa, sa->sa_len);
447
270
		sin6.sin6_len = sizeof(struct sockaddr_in6);
448
270
		sin6.sin6_family = AF_INET6;
449

342
		if (sa->sa_len == sizeof(struct sockaddr_in6) &&
450

342
		    (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
451

204
		     IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) ||
452

204
		     IN6_IS_ADDR_MC_INTFACELOCAL(&sin6.sin6_addr)) &&
453
72
		    sin6.sin6_scope_id == 0) {
454
			sin6.sin6_scope_id =
455
			    ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
456
			sin6.sin6_addr.s6_addr[2] = 0;
457
			sin6.sin6_addr.s6_addr[3] = 0;
458
		}
459
270
		return (routename6(&sin6));
460
270
	    }
461
462
	case AF_LINK:
463
24
		return (link_print(sa));
464
	case AF_MPLS:
465
		return (label_print(sa));
466
	case AF_UNSPEC:
467
		if (sa->sa_len == sizeof(struct sockaddr_rtlabel)) {
468
			static char name[RTLABEL_LEN + 2];
469
			struct sockaddr_rtlabel *sr;
470
471
			sr = (struct sockaddr_rtlabel *)sa;
472
			snprintf(name, sizeof(name), "\"%s\"", sr->sr_label);
473
			return (name);
474
		}
475
		/* FALLTHROUGH */
476
	default:
477
		(void)snprintf(line, sizeof(line), "(%d) %s",
478
		    sa->sa_family, any_ntoa(sa));
479
		break;
480
	}
481
	return (line);
482
1812
}
483
484
char *
485
routename4(in_addr_t in)
486
{
487
	char		*cp = NULL;
488
	struct in_addr	 ina;
489
	struct hostent	*hp;
490
491
1518
	if (in == INADDR_ANY)
492
		cp = "default";
493
1518
	if (!cp && !nflag) {
494
		if ((hp = gethostbyaddr((char *)&in,
495
		    sizeof(in), AF_INET)) != NULL) {
496
			if ((cp = strchr(hp->h_name, '.')) &&
497
			    !strcmp(cp + 1, domain))
498
				*cp = '\0';
499
			cp = hp->h_name;
500
		}
501
	}
502
1518
	ina.s_addr = in;
503
4554
	strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line));
504
505
1518
	return (line);
506
}
507
508
char *
509
routename6(struct sockaddr_in6 *sin6)
510
{
511
	int	 niflags = 0;
512
513
540
	if (nflag)
514
270
		niflags |= NI_NUMERICHOST;
515
	else
516
		niflags |= NI_NOFQDN;
517
518
540
	if (getnameinfo((struct sockaddr *)sin6, sin6->sin6_len,
519
270
	    line, sizeof(line), NULL, 0, niflags) != 0)
520
		strncpy(line, "invalid", sizeof(line));
521
522
270
	return (line);
523
}
524
525
/*
526
 * Return the name of the network whose address is given.
527
 * The address is assumed to be that of a net or subnet, not a host.
528
 */
529
char *
530
netname4(in_addr_t in, struct sockaddr_in *maskp)
531
{
532
	char *cp = NULL;
533
	struct netent *np = NULL;
534
	in_addr_t mask;
535
	int mbits;
536
537
684
	in = ntohl(in);
538

1368
	mask = maskp && maskp->sin_len != 0 ? ntohl(maskp->sin_addr.s_addr) : 0;
539
342
	if (!nflag && in != INADDR_ANY) {
540
		if ((np = getnetbyaddr(in, AF_INET)) != NULL)
541
			cp = np->n_name;
542
	}
543
342
	if (in == INADDR_ANY && mask == INADDR_ANY)
544
		cp = "default";
545
1026
	mbits = mask ? 33 - ffs(mask) : 0;
546
342
	if (cp)
547
		strlcpy(line, cp, sizeof(line));
548
#define C(x)	((x) & 0xff)
549
342
	else if (mbits < 9)
550
6
		snprintf(line, sizeof(line), "%u/%d", C(in >> 24), mbits);
551
336
	else if (mbits < 17)
552
48
		snprintf(line, sizeof(line), "%u.%u/%d",
553
48
		    C(in >> 24) , C(in >> 16), mbits);
554
288
	else if (mbits < 25)
555
276
		snprintf(line, sizeof(line), "%u.%u.%u/%d",
556
		    C(in >> 24), C(in >> 16), C(in >> 8), mbits);
557
	else
558
12
		snprintf(line, sizeof(line), "%u.%u.%u.%u/%d", C(in >> 24),
559
12
		    C(in >> 16), C(in >> 8), C(in), mbits);
560
#undef C
561
342
	return (line);
562
}
563
564
char *
565
netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask)
566
{
567
144
	struct sockaddr_in6 sin6;
568
	u_char *p;
569
	int masklen, final = 0, illegal = 0;
570
	int i, lim, flag, error;
571
72
	char hbuf[NI_MAXHOST];
572
573
72
	sin6 = *sa6;
574
575
	flag = 0;
576
	masklen = 0;
577
72
	if (mask) {
578
72
		lim = mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr);
579
72
		lim = lim < (int)sizeof(struct in6_addr) ?
580
		    lim : (int)sizeof(struct in6_addr);
581
2448
		for (p = (u_char *)&mask->sin6_addr, i = 0; i < lim; p++) {
582

1944
			if (final && *p) {
583
				illegal++;
584
				sin6.sin6_addr.s6_addr[i++] = 0x00;
585
				continue;
586
			}
587
588


1152
			switch (*p & 0xff) {
589
			case 0xff:
590
288
				masklen += 8;
591
288
				break;
592
			case 0xfe:
593
				masklen += 7;
594
				final++;
595
				break;
596
			case 0xfc:
597
				masklen += 6;
598
				final++;
599
				break;
600
			case 0xf8:
601
				masklen += 5;
602
				final++;
603
				break;
604
			case 0xf0:
605
				masklen += 4;
606
				final++;
607
				break;
608
			case 0xe0:
609
				masklen += 3;
610
				final++;
611
				break;
612
			case 0xc0:
613
				masklen += 2;
614
				final++;
615
				break;
616
			case 0x80:
617
				masklen += 1;
618
				final++;
619
				break;
620
			case 0x00:
621
864
				final++;
622
864
				break;
623
			default:
624
				final++;
625
				illegal++;
626
				break;
627
			}
628
629
1152
			if (!illegal)
630
1152
				sin6.sin6_addr.s6_addr[i++] &= *p;
631
			else
632
				sin6.sin6_addr.s6_addr[i++] = 0x00;
633
		}
634
144
		while (i < (int)sizeof(struct in6_addr))
635
			sin6.sin6_addr.s6_addr[i++] = 0x00;
636
	} else
637
		masklen = 128;
638
639


72
	if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr))
640
		return ("default");
641
642
72
	if (illegal)
643
		warnx("illegal prefixlen");
644
645
72
	if (nflag)
646
72
		flag |= NI_NUMERICHOST;
647
144
	error = getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
648
72
	    hbuf, sizeof(hbuf), NULL, 0, flag);
649
72
	if (error)
650
		snprintf(hbuf, sizeof(hbuf), "invalid");
651
652
72
	snprintf(line, sizeof(line), "%s/%d", hbuf, masklen);
653
72
	return (line);
654
72
}
655
656
/*
657
 * Return the name of the network whose address is given.
658
 * The address is assumed to be that of a net or subnet, not a host.
659
 */
660
char *
661
netname(struct sockaddr *sa, struct sockaddr *mask)
662
{
663

828
	switch (sa->sa_family) {
664
	case AF_INET:
665
684
		return netname4(((struct sockaddr_in *)sa)->sin_addr.s_addr,
666
342
		    (struct sockaddr_in *)mask);
667
	case AF_INET6:
668
144
		return netname6((struct sockaddr_in6 *)sa,
669
72
		    (struct sockaddr_in6 *)mask);
670
	case AF_LINK:
671
		return (link_print(sa));
672
	case AF_MPLS:
673
		return (label_print(sa));
674
	default:
675
		snprintf(line, sizeof(line), "af %d: %s",
676
		    sa->sa_family, any_ntoa(sa));
677
		break;
678
	}
679
	return (line);
680
414
}
681
682
static const char hexlist[] = "0123456789abcdef";
683
684
char *
685
any_ntoa(const struct sockaddr *sa)
686
{
687
	static char obuf[240];
688
	const char *in = sa->sa_data;
689
	char *out = obuf;
690
	int len = sa->sa_len - offsetof(struct sockaddr, sa_data);
691
692
	*out++ = 'Q';
693
	do {
694
		*out++ = hexlist[(*in >> 4) & 15];
695
		*out++ = hexlist[(*in++)    & 15];
696
		*out++ = '.';
697
	} while (--len > 0 && (out + 3) < &obuf[sizeof(obuf) - 1]);
698
	out[-1] = '\0';
699
	return (obuf);
700
}
701
702
char *
703
link_print(struct sockaddr *sa)
704
{
705
48
	struct sockaddr_dl	*sdl = (struct sockaddr_dl *)sa;
706
24
	u_char			*lla = (u_char *)sdl->sdl_data + sdl->sdl_nlen;
707
708

24
	if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
709
	    sdl->sdl_slen == 0) {
710
		(void)snprintf(line, sizeof(line), "link#%d", sdl->sdl_index);
711
		return (line);
712
	}
713
24
	switch (sdl->sdl_type) {
714
	case IFT_ETHER:
715
	case IFT_CARP:
716
24
		return (ether_ntoa((struct ether_addr *)lla));
717
	default:
718
		return (link_ntoa(sdl));
719
	}
720
24
}
721
722
char *
723
mpls_op(u_int32_t type)
724
{
725
	switch (type & (MPLS_OP_PUSH | MPLS_OP_POP | MPLS_OP_SWAP)) {
726
	case MPLS_OP_LOCAL:
727
		return ("LOCAL");
728
	case MPLS_OP_POP:
729
		return ("POP");
730
	case MPLS_OP_SWAP:
731
		return ("SWAP");
732
	case MPLS_OP_PUSH:
733
		return ("PUSH");
734
	default:
735
		return ("?");
736
	}
737
}
738
739
char *
740
label_print(struct sockaddr *sa)
741
{
742
	struct sockaddr_mpls	*smpls = (struct sockaddr_mpls *)sa;
743
744
	if (smpls)
745
		(void)snprintf(line, sizeof(line), "%u",
746
		    ntohl(smpls->smpls_label) >> MPLS_LABEL_OFFSET);
747
	else
748
		(void)snprintf(line, sizeof(line), "-");
749
750
	return (line);
751
}