GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/netstat/show.c Lines: 203 321 63.2 %
Date: 2017-11-13 Branches: 114 225 50.7 %

Line Branch Exec Source
1
/*	$OpenBSD: show.c,v 1.53 2017/01/21 11:32:04 guenther 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 "netstat.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	 p_rtentry(struct rt_msghdr *);
101
void	 pr_family(int);
102
void	 p_sockaddr(struct sockaddr *, struct sockaddr *, int, 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
108
size_t
109
get_sysctl(const int *mib, u_int mcnt, char **buf)
110
{
111
160
	size_t needed;
112
113
80
	while (1) {
114
80
		if (sysctl(mib, mcnt, NULL, &needed, NULL, 0) == -1)
115
			err(1, "sysctl-estimate");
116
80
		if (needed == 0)
117
			break;
118
80
		if ((*buf = realloc(*buf, needed)) == NULL)
119
			err(1, NULL);
120
80
		if (sysctl(mib, mcnt, *buf, &needed, NULL, 0) == -1) {
121
			if (errno == ENOMEM)
122
				continue;
123
			err(1, "sysctl");
124
		}
125
		break;
126
	}
127
128
160
	return needed;
129
80
}
130
131
/*
132
 * Print routing tables.
133
 */
134
void
135
p_rttables(int af, u_int tableid)
136
{
137
	struct rt_msghdr *rtm;
138
160
	char *buf = NULL, *next, *lim = NULL;
139
	size_t needed;
140
80
	int mib[7], mcnt;
141
	struct sockaddr *sa;
142
143
80
	mib[0] = CTL_NET;
144
80
	mib[1] = PF_ROUTE;
145
80
	mib[2] = 0;
146
80
	mib[3] = af;
147
80
	mib[4] = NET_RT_DUMP;
148
80
	mib[5] = 0;
149
80
	mib[6] = tableid;
150
	mcnt = 7;
151
152
80
	needed = get_sysctl(mib, mcnt, &buf);
153
80
	lim = buf + needed;
154
155
80
	printf("Routing tables\n");
156
157
80
	if (buf) {
158
3392
		for (next = buf; next < lim; next += rtm->rtm_msglen) {
159
1616
			rtm = (struct rt_msghdr *)next;
160
1616
			if (rtm->rtm_version != RTM_VERSION)
161
				continue;
162
1616
			sa = (struct sockaddr *)(next + rtm->rtm_hdrlen);
163
1616
			p_rtentry(rtm);
164
1616
		}
165
	}
166
80
	free(buf);
167
80
}
168
169
/*
170
 * column widths; each followed by one space
171
 * width of destination/gateway column
172
 * strlen("fe80::aaaa:bbbb:cccc:dddd@gif0") == 30, strlen("/128") == 4
173
 */
174
#define	WID_GW(af)	((af) == AF_INET6 ? (nflag ? 30 : 18) : 18)
175
176
int
177
WID_DST(int af)
178
{
179
180
6944
	if (nflag)
181
3472
		switch (af) {
182
		case AF_MPLS:
183
			return 9;
184
		case AF_INET6:
185
2560
			return 34;
186
		default:
187
912
			return 18;
188
		}
189
	else
190
		switch (af) {
191
		case AF_MPLS:
192
			return 9;
193
 		default:
194
			return 18;
195
		}
196
3472
}
197
198
/*
199
 * Print header for routing table columns.
200
 */
201
void
202
pr_rthdr(int af, int Aflag)
203
{
204
240
	if (Aflag)
205
		printf("%-*.*s ", PLEN, PLEN, "Address");
206
120
	switch (af) {
207
	case PF_KEY:
208
		printf("%-18s %-5s %-18s %-5s %-5s %-22s\n",
209
		    "Source", "Port", "Destination",
210
		    "Port", "Proto", "SA(Address/Proto/Type/Direction)");
211
		break;
212
	case PF_MPLS:
213
		printf("%-9s %-9s %-6s %-18s %-6.6s %5.5s %8.8s %5.5s  %4.4s %s\n",
214
		    "In label", "Out label", "Op", "Gateway",
215
		    "Flags", "Refs", "Use", "Mtu", "Prio", "Interface");
216
		break;
217
	default:
218
120
		printf("%-*.*s %-*.*s %-6.6s %5.5s %8.8s %5.5s  %4.4s %s",
219
120
		    WID_DST(af), WID_DST(af), "Destination",
220

520
		    WID_GW(af), WID_GW(af), "Gateway",
221
		    "Flags", "Refs", "Use", "Mtu", "Prio", "Iface");
222
120
		if (vflag && !Aflag)
223
			printf(" %s", "Label");
224
240
		putchar('\n');
225
		break;
226
	}
227
120
}
228
229
static void
230
get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
231
{
232
	int	i;
233
234
53328
	for (i = 0; i < RTAX_MAX; i++) {
235
24240
		if (addrs & (1 << i)) {
236
8080
			rti_info[i] = sa;
237
16160
			sa = (struct sockaddr *)((char *)(sa) +
238
24240
			    ROUNDUP(sa->sa_len));
239
8080
		} else
240
16160
			rti_info[i] = NULL;
241
	}
242
1616
}
243
244
/*
245
 * Print a routing table entry.
246
 */
247
void
248
p_rtentry(struct rt_msghdr *rtm)
249
{
250
	static int	 old_af = -1;
251
3232
	struct sockaddr	*sa = (struct sockaddr *)((char *)rtm + rtm->rtm_hdrlen);
252
1616
	struct sockaddr	*mask, *rti_info[RTAX_MAX];
253
1616
	char		 ifbuf[IF_NAMESIZE];
254
255
1616
	if (sa->sa_family == AF_KEY)
256
		return;
257
258
1616
	get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
259
260

1616
	if (Fflag && rti_info[RTAX_GATEWAY]->sa_family != sa->sa_family) {
261
		return;
262
	}
263
1616
	if (old_af != sa->sa_family) {
264
120
		old_af = sa->sa_family;
265
120
		pr_family(sa->sa_family);
266
120
		pr_rthdr(sa->sa_family, 0);
267
120
	}
268
269
1616
	mask = rti_info[RTAX_NETMASK];
270
1616
	if ((sa = rti_info[RTAX_DST]) == NULL)
271
		return;
272
273
1616
	p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family));
274
3232
	p_sockaddr_mpls(sa, rti_info[RTAX_SRC], rtm->rtm_mpls,
275
1616
	    WID_DST(sa->sa_family));
276
277
3232
	p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST,
278
4432
	    WID_GW(sa->sa_family));
279
280
1616
	p_flags(rtm->rtm_flags, "%-6.6s ");
281
3232
	printf("%5u %8llu ", rtm->rtm_rmx.rmx_refcnt,
282
1616
	    rtm->rtm_rmx.rmx_pksent);
283
1616
	if (rtm->rtm_rmx.rmx_mtu)
284
1092
		printf("%5u ", rtm->rtm_rmx.rmx_mtu);
285
	else
286
524
		printf("%5s ", "-");
287
3232
	putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' ');
288
3232
	printf("  %2d %-5.16s", rtm->rtm_priority,
289
1616
	    if_indextoname(rtm->rtm_index, ifbuf));
290

1616
	if (vflag && rti_info[RTAX_LABEL])
291
		printf(" %s", ((struct sockaddr_rtlabel *)
292
		    rti_info[RTAX_LABEL])->sr_label);
293
3232
	putchar('\n');
294
3232
}
295
296
/*
297
 * Print address family header before a section of the routing table.
298
 */
299
void
300
pr_family(int af)
301
{
302
	char *afname;
303
304

240
	switch (af) {
305
	case AF_INET:
306
		afname = "Internet";
307
40
		break;
308
	case AF_INET6:
309
		afname = "Internet6";
310
80
		break;
311
	case PF_KEY:
312
		afname = "Encap";
313
		break;
314
	case AF_MPLS:
315
		afname = "MPLS";
316
		break;
317
	default:
318
		afname = NULL;
319
		break;
320
	}
321
120
	if (afname)
322
120
		printf("\n%s:\n", afname);
323
	else
324
		printf("\nProtocol Family %d:\n", af);
325
120
}
326
327
void
328
p_addr(struct sockaddr *sa, struct sockaddr *mask, int flags)
329
{
330
	p_sockaddr(sa, mask, flags, WID_DST(sa->sa_family));
331
}
332
333
void
334
p_gwaddr(struct sockaddr *sa, int af)
335
{
336
	p_sockaddr(sa, 0, RTF_HOST, WID_GW(af));
337
}
338
339
void
340
p_sockaddr(struct sockaddr *sa, struct sockaddr *mask, int flags, int width)
341
{
342
	char *cp;
343
344
6464
	switch (sa->sa_family) {
345
	case AF_INET6:
346
	    {
347
2352
		struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
348
2352
		struct in6_addr *in6 = &sa6->sin6_addr;
349
350
		/*
351
		 * XXX: This is a special workaround for KAME kernels.
352
		 * sin6_scope_id field of SA should be set in the future.
353
		 */
354

2976
		if (IN6_IS_ADDR_LINKLOCAL(in6) ||
355

2264
		    IN6_IS_ADDR_MC_LINKLOCAL(in6) ||
356
1944
		    IN6_IS_ADDR_MC_INTFACELOCAL(in6)) {
357
			/* XXX: override is ok? */
358
728
			sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)
359
			    &in6->s6_addr[2]);
360
728
			*(u_short *)&in6->s6_addr[2] = 0;
361
728
		}
362
2352
		if (flags & RTF_HOST)
363
1312
			cp = routename((struct sockaddr *)sa6);
364
		else
365
1040
			cp = netname((struct sockaddr *)sa6, mask);
366
		break;
367
	    }
368
	case AF_MPLS:
369
		return;
370
	default:
371
880
		if ((flags & RTF_HOST) || mask == NULL)
372
710
			cp = routename(sa);
373
		else
374
170
			cp = netname(sa, mask);
375
		break;
376
	}
377
3232
	if (width < 0)
378
		printf("%s", cp);
379
	else {
380
3232
		if (nflag)
381
3232
			printf("%-*s ", width, cp);
382
		else
383
			printf("%-*.*s ", width, width, cp);
384
	}
385
6464
}
386
387
static char line[HOST_NAME_MAX+1];
388
static char domain[HOST_NAME_MAX+1];
389
390
void
391
p_sockaddr_mpls(struct sockaddr *in, struct sockaddr *out, int flags, int width)
392
{
393
3232
	if (in->sa_family != AF_MPLS)
394
		return;
395
396
	if (flags & MPLS_OP_POP || flags == MPLS_OP_LOCAL) {
397
		printf("%-*s ", width, label_print(in));
398
		printf("%-*s ", width, label_print(NULL));
399
	} else {
400
		printf("%-*s ", width, label_print(in));
401
		printf("%-*s ", width, label_print(out));
402
	}
403
404
	printf("%-6s ", mpls_op(flags));
405
1616
}
406
407
void
408
p_flags(int f, char *format)
409
{
410
3232
	char name[33], *flags;
411
	const struct bits *p = bits;
412
413
77568
	for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++)
414
37168
		if (p->b_mask & f)
415
5784
			*flags++ = p->b_val;
416
1616
	*flags = '\0';
417
1616
	printf(format, name);
418
1616
}
419
420
char *
421
routename(struct sockaddr *sa)
422
{
423
	char *cp = NULL;
424
	static int first = 1;
425
426
4044
	if (first) {
427
80
		first = 0;
428

160
		if (gethostname(domain, sizeof(domain)) == 0 &&
429
80
		    (cp = strchr(domain, '.')))
430
80
			(void)strlcpy(domain, cp + 1, sizeof(domain));
431
		else
432
			domain[0] = '\0';
433
		cp = NULL;
434
80
	}
435
436
2022
	if (sa->sa_len == 0) {
437
		(void)strlcpy(line, "default", sizeof(line));
438
		return (line);
439
	}
440
441

2022
	switch (sa->sa_family) {
442
	case AF_INET:
443
518
		return
444
518
		    (routename4(((struct sockaddr_in *)sa)->sin_addr.s_addr));
445
446
	case AF_INET6:
447
	    {
448
1312
		struct sockaddr_in6 sin6;
449
450
1312
		memset(&sin6, 0, sizeof(sin6));
451
1312
		memcpy(&sin6, sa, sa->sa_len);
452
1312
		sin6.sin6_family = AF_INET6;
453

1616
		if (sa->sa_len == sizeof(struct sockaddr_in6) &&
454

1616
		    (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
455

1008
		     IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) ||
456

1008
		     IN6_IS_ADDR_MC_INTFACELOCAL(&sin6.sin6_addr)) &&
457
304
		    sin6.sin6_scope_id == 0) {
458
			sin6.sin6_scope_id =
459
			    ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
460
			sin6.sin6_addr.s6_addr[2] = 0;
461
			sin6.sin6_addr.s6_addr[3] = 0;
462
		}
463
1312
		return (routename6(&sin6));
464
1312
	    }
465
466
	case AF_LINK:
467
192
		return (link_print(sa));
468
	case AF_MPLS:
469
		return (label_print(sa));
470
	case AF_UNSPEC:
471
		if (sa->sa_len == sizeof(struct sockaddr_rtlabel)) {
472
			static char name[RTLABEL_LEN];
473
			struct sockaddr_rtlabel *sr;
474
475
			sr = (struct sockaddr_rtlabel *)sa;
476
			(void)strlcpy(name, sr->sr_label, sizeof(name));
477
			return (name);
478
		}
479
		/* FALLTHROUGH */
480
	default:
481
		(void)snprintf(line, sizeof(line), "(%d) %s",
482
		    sa->sa_family, any_ntoa(sa));
483
		break;
484
	}
485
	return (line);
486
2022
}
487
488
char *
489
routename4(in_addr_t in)
490
{
491
	char		*cp = NULL;
492
	struct in_addr	 ina;
493
	struct hostent	*hp;
494
495
518
	if (in == INADDR_ANY)
496
		cp = "default";
497
518
	if (!cp && !nflag) {
498
		if ((hp = gethostbyaddr((char *)&in,
499
		    sizeof(in), AF_INET)) != NULL) {
500
			if ((cp = strchr(hp->h_name, '.')) &&
501
			    !strcmp(cp + 1, domain))
502
				*cp = '\0';
503
			cp = hp->h_name;
504
		}
505
	}
506
518
	ina.s_addr = in;
507
1554
	strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line));
508
509
518
	return (line);
510
}
511
512
char *
513
routename6(struct sockaddr_in6 *sin6)
514
{
515
	int	 niflags = 0;
516
517
2624
	if (nflag)
518
1312
		niflags |= NI_NUMERICHOST;
519
	else
520
		niflags |= NI_NOFQDN;
521
522
2624
	if (getnameinfo((struct sockaddr *)sin6, sizeof(*sin6),
523
1312
	    line, sizeof(line), NULL, 0, niflags) != 0)
524
		strncpy(line, "invalid", sizeof(line));
525
526
1312
	return (line);
527
}
528
529
/*
530
 * Return the name of the network whose address is given.
531
 * The address is assumed to be that of a net or subnet, not a host.
532
 */
533
char *
534
netname4(in_addr_t in, in_addr_t mask)
535
{
536
	int mbits;
537
538
340
	in = ntohl(in);
539
170
	mask = ntohl(mask);
540
470
	mbits = mask ? 33 - ffs(mask) : 0;
541
170
	if (in == INADDR_ANY && mask == INADDR_ANY)
542
40
		strlcpy(line, "default", sizeof(line));
543
#define C(x)	((x) & 0xff)
544
130
	else if (mbits < 9)
545
56
		snprintf(line, sizeof(line), "%u/%d", C(in >> 24), mbits);
546
74
	else if (mbits < 17)
547
		snprintf(line, sizeof(line), "%u.%u/%d",
548
		    C(in >> 24) , C(in >> 16), mbits);
549
74
	else if (mbits < 25)
550
74
		snprintf(line, sizeof(line), "%u.%u.%u/%d",
551
		    C(in >> 24), C(in >> 16), C(in >> 8), mbits);
552
	else
553
		snprintf(line, sizeof(line), "%u.%u.%u.%u/%d", C(in >> 24),
554
		    C(in >> 16), C(in >> 8), C(in), mbits);
555
#undef C
556
170
	return (line);
557
}
558
559
char *
560
netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask)
561
{
562
2080
	struct sockaddr_in6 sin6;
563
	u_char *p;
564
	int masklen, final = 0, illegal = 0;
565
	int i, lim, flag, error;
566
1040
	char hbuf[NI_MAXHOST];
567
568
1040
	sin6 = *sa6;
569
570
	flag = 0;
571
	masklen = 0;
572
1040
	if (mask) {
573
1040
		lim = mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr);
574
1040
		lim = lim < (int)sizeof(struct in6_addr) ?
575
		    lim : (int)sizeof(struct in6_addr);
576
35360
		for (p = (u_char *)&mask->sin6_addr, i = 0; i < lim; p++) {
577

25872
			if (final && *p) {
578
				illegal++;
579
				sin6.sin6_addr.s6_addr[i++] = 0x00;
580
				continue;
581
			}
582
583


16640
			switch (*p & 0xff) {
584
			case 0xff:
585
6368
				masklen += 8;
586
6368
				break;
587
			case 0xfe:
588
				masklen += 7;
589
				final++;
590
				break;
591
			case 0xfc:
592
				masklen += 6;
593
				final++;
594
				break;
595
			case 0xf8:
596
				masklen += 5;
597
				final++;
598
				break;
599
			case 0xf0:
600
112
				masklen += 4;
601
112
				final++;
602
112
				break;
603
			case 0xe0:
604
				masklen += 3;
605
				final++;
606
				break;
607
			case 0xc0:
608
112
				masklen += 2;
609
112
				final++;
610
112
				break;
611
			case 0x80:
612
				masklen += 1;
613
				final++;
614
				break;
615
			case 0x00:
616
10048
				final++;
617
10048
				break;
618
			default:
619
				final++;
620
				illegal++;
621
				break;
622
			}
623
624
16640
			if (!illegal)
625
16640
				sin6.sin6_addr.s6_addr[i++] &= *p;
626
			else
627
				sin6.sin6_addr.s6_addr[i++] = 0x00;
628
		}
629
2080
		while (i < (int)sizeof(struct in6_addr))
630
			sin6.sin6_addr.s6_addr[i++] = 0x00;
631
	} else
632
		masklen = 128;
633
634


1040
	if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr))
635
		return ("default");
636
637
1040
	if (illegal)
638
		warnx("illegal prefixlen");
639
640
1040
	if (nflag)
641
1040
		flag |= NI_NUMERICHOST;
642
2080
	error = getnameinfo((struct sockaddr *)&sin6, sizeof(sin6),
643
1040
	    hbuf, sizeof(hbuf), NULL, 0, flag);
644
1040
	if (error)
645
		snprintf(hbuf, sizeof(hbuf), "invalid");
646
647
1040
	snprintf(line, sizeof(line), "%s/%d", hbuf, masklen);
648
1040
	return (line);
649
1040
}
650
651
/*
652
 * Return the name of the network whose address is given.
653
 * The address is assumed to be that of a net or subnet, not a host.
654
 */
655
char *
656
netname(struct sockaddr *sa, struct sockaddr *mask)
657
{
658

2420
	switch (sa->sa_family) {
659
	case AF_INET:
660
340
		return netname4(((struct sockaddr_in *)sa)->sin_addr.s_addr,
661
510
		    mask->sa_len == 0 ? 0 :
662
170
		    ((struct sockaddr_in *)mask)->sin_addr.s_addr);
663
	case AF_INET6:
664
2080
		return netname6((struct sockaddr_in6 *)sa,
665
1040
		    (struct sockaddr_in6 *)mask);
666
	case AF_LINK:
667
		return (link_print(sa));
668
	case AF_MPLS:
669
		return (label_print(sa));
670
	default:
671
		snprintf(line, sizeof(line), "af %d: %s",
672
		    sa->sa_family, any_ntoa(sa));
673
		break;
674
	}
675
	return (line);
676
1210
}
677
678
static const char hexlist[] = "0123456789abcdef";
679
680
char *
681
any_ntoa(const struct sockaddr *sa)
682
{
683
	static char obuf[240];
684
	const char *in = sa->sa_data;
685
	char *out = obuf;
686
	int len = sa->sa_len - offsetof(struct sockaddr, sa_data);
687
688
	*out++ = 'Q';
689
	do {
690
		*out++ = hexlist[(*in >> 4) & 15];
691
		*out++ = hexlist[(*in++)    & 15];
692
		*out++ = '.';
693
	} while (--len > 0 && (out + 3) < &obuf[sizeof(obuf) - 1]);
694
	out[-1] = '\0';
695
	return (obuf);
696
}
697
698
char *
699
link_print(struct sockaddr *sa)
700
{
701
384
	struct sockaddr_dl	*sdl = (struct sockaddr_dl *)sa;
702
192
	u_char			*lla = (u_char *)sdl->sdl_data + sdl->sdl_nlen;
703
704

262
	if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
705
	    sdl->sdl_slen == 0) {
706
		(void)snprintf(line, sizeof(line), "link#%d", sdl->sdl_index);
707
		return (line);
708
	}
709
192
	switch (sdl->sdl_type) {
710
	case IFT_ETHER:
711
	case IFT_CARP:
712
192
		return (ether_ntoa((struct ether_addr *)lla));
713
	default:
714
		return (link_ntoa(sdl));
715
	}
716
192
}
717
718
char *
719
mpls_op(u_int32_t type)
720
{
721
	switch (type & (MPLS_OP_PUSH | MPLS_OP_POP | MPLS_OP_SWAP)) {
722
	case MPLS_OP_LOCAL:
723
		return ("LOCAL");
724
	case MPLS_OP_POP:
725
		return ("POP");
726
	case MPLS_OP_SWAP:
727
		return ("SWAP");
728
	case MPLS_OP_PUSH:
729
		return ("PUSH");
730
	default:
731
		return ("?");
732
	}
733
}
734
735
char *
736
label_print(struct sockaddr *sa)
737
{
738
	struct sockaddr_mpls	*smpls = (struct sockaddr_mpls *)sa;
739
740
	if (smpls)
741
		(void)snprintf(line, sizeof(line), "%u",
742
		    ntohl(smpls->smpls_label) >> MPLS_LABEL_OFFSET);
743
	else
744
		(void)snprintf(line, sizeof(line), "-");
745
746
	return (line);
747
}