xref: /openbsd/usr.bin/netstat/show.c (revision 6f40fd34) 
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 	size_t needed;
112 
113 	while (1) {
114 		if (sysctl(mib, mcnt, NULL, &needed, NULL, 0) == -1)
115 			err(1, "sysctl-estimate");
116 		if (needed == 0)
117 			break;
118 		if ((*buf = realloc(*buf, needed)) == NULL)
119 			err(1, NULL);
120 		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 	return needed;
129 }
130 
131 /*
132  * Print routing tables.
133  */
134 void
135 p_rttables(int af, u_int tableid)
136 {
137 	struct rt_msghdr *rtm;
138 	char *buf = NULL, *next, *lim = NULL;
139 	size_t needed;
140 	int mib[7], mcnt;
141 	struct sockaddr *sa;
142 
143 	mib[0] = CTL_NET;
144 	mib[1] = PF_ROUTE;
145 	mib[2] = 0;
146 	mib[3] = af;
147 	mib[4] = NET_RT_DUMP;
148 	mib[5] = 0;
149 	mib[6] = tableid;
150 	mcnt = 7;
151 
152 	needed = get_sysctl(mib, mcnt, &buf);
153 	lim = buf + needed;
154 
155 	printf("Routing tables\n");
156 
157 	if (buf) {
158 		for (next = buf; next < lim; next += rtm->rtm_msglen) {
159 			rtm = (struct rt_msghdr *)next;
160 			if (rtm->rtm_version != RTM_VERSION)
161 				continue;
162 			sa = (struct sockaddr *)(next + rtm->rtm_hdrlen);
163 			p_rtentry(rtm);
164 		}
165 	}
166 	free(buf);
167 }
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 	if (nflag)
181 		switch (af) {
182 		case AF_MPLS:
183 			return 9;
184 		case AF_INET6:
185 			return 34;
186 		default:
187 			return 18;
188 		}
189 	else
190 		switch (af) {
191 		case AF_MPLS:
192 			return 9;
193  		default:
194 			return 18;
195 		}
196 }
197 
198 /*
199  * Print header for routing table columns.
200  */
201 void
202 pr_rthdr(int af, int Aflag)
203 {
204 	if (Aflag)
205 		printf("%-*.*s ", PLEN, PLEN, "Address");
206 	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 		printf("%-*.*s %-*.*s %-6.6s %5.5s %8.8s %5.5s  %4.4s %s",
219 		    WID_DST(af), WID_DST(af), "Destination",
220 		    WID_GW(af), WID_GW(af), "Gateway",
221 		    "Flags", "Refs", "Use", "Mtu", "Prio", "Iface");
222 		if (vflag && !Aflag)
223 			printf(" %s", "Label");
224 		putchar('\n');
225 		break;
226 	}
227 }
228 
229 static void
230 get_rtaddrs(int addrs, struct sockaddr *sa, struct sockaddr **rti_info)
231 {
232 	int	i;
233 
234 	for (i = 0; i < RTAX_MAX; i++) {
235 		if (addrs & (1 << i)) {
236 			rti_info[i] = sa;
237 			sa = (struct sockaddr *)((char *)(sa) +
238 			    ROUNDUP(sa->sa_len));
239 		} else
240 			rti_info[i] = NULL;
241 	}
242 }
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 	struct sockaddr	*sa = (struct sockaddr *)((char *)rtm + rtm->rtm_hdrlen);
252 	struct sockaddr	*mask, *rti_info[RTAX_MAX];
253 	char		 ifbuf[IF_NAMESIZE];
254 
255 	if (sa->sa_family == AF_KEY)
256 		return;
257 
258 	get_rtaddrs(rtm->rtm_addrs, sa, rti_info);
259 
260 	if (Fflag && rti_info[RTAX_GATEWAY]->sa_family != sa->sa_family) {
261 		return;
262 	}
263 	if (old_af != sa->sa_family) {
264 		old_af = sa->sa_family;
265 		pr_family(sa->sa_family);
266 		pr_rthdr(sa->sa_family, 0);
267 	}
268 
269 	mask = rti_info[RTAX_NETMASK];
270 	if ((sa = rti_info[RTAX_DST]) == NULL)
271 		return;
272 
273 	p_sockaddr(sa, mask, rtm->rtm_flags, WID_DST(sa->sa_family));
274 	p_sockaddr_mpls(sa, rti_info[RTAX_SRC], rtm->rtm_mpls,
275 	    WID_DST(sa->sa_family));
276 
277 	p_sockaddr(rti_info[RTAX_GATEWAY], NULL, RTF_HOST,
278 	    WID_GW(sa->sa_family));
279 
280 	p_flags(rtm->rtm_flags, "%-6.6s ");
281 	printf("%5u %8llu ", rtm->rtm_rmx.rmx_refcnt,
282 	    rtm->rtm_rmx.rmx_pksent);
283 	if (rtm->rtm_rmx.rmx_mtu)
284 		printf("%5u ", rtm->rtm_rmx.rmx_mtu);
285 	else
286 		printf("%5s ", "-");
287 	putchar((rtm->rtm_rmx.rmx_locks & RTV_MTU) ? 'L' : ' ');
288 	printf("  %2d %-5.16s", rtm->rtm_priority,
289 	    if_indextoname(rtm->rtm_index, ifbuf));
290 	if (vflag && rti_info[RTAX_LABEL])
291 		printf(" %s", ((struct sockaddr_rtlabel *)
292 		    rti_info[RTAX_LABEL])->sr_label);
293 	putchar('\n');
294 }
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 	switch (af) {
305 	case AF_INET:
306 		afname = "Internet";
307 		break;
308 	case AF_INET6:
309 		afname = "Internet6";
310 		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 	if (afname)
322 		printf("\n%s:\n", afname);
323 	else
324 		printf("\nProtocol Family %d:\n", af);
325 }
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 	switch (sa->sa_family) {
345 	case AF_INET6:
346 	    {
347 		struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
348 		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 		if (IN6_IS_ADDR_LINKLOCAL(in6) ||
355 		    IN6_IS_ADDR_MC_LINKLOCAL(in6) ||
356 		    IN6_IS_ADDR_MC_INTFACELOCAL(in6)) {
357 			/* XXX: override is ok? */
358 			sa6->sin6_scope_id = (u_int32_t)ntohs(*(u_short *)
359 			    &in6->s6_addr[2]);
360 			*(u_short *)&in6->s6_addr[2] = 0;
361 		}
362 		if (flags & RTF_HOST)
363 			cp = routename((struct sockaddr *)sa6);
364 		else
365 			cp = netname((struct sockaddr *)sa6, mask);
366 		break;
367 	    }
368 	case AF_MPLS:
369 		return;
370 	default:
371 		if ((flags & RTF_HOST) || mask == NULL)
372 			cp = routename(sa);
373 		else
374 			cp = netname(sa, mask);
375 		break;
376 	}
377 	if (width < 0)
378 		printf("%s", cp);
379 	else {
380 		if (nflag)
381 			printf("%-*s ", width, cp);
382 		else
383 			printf("%-*.*s ", width, width, cp);
384 	}
385 }
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 	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 }
406 
407 void
408 p_flags(int f, char *format)
409 {
410 	char name[33], *flags;
411 	const struct bits *p = bits;
412 
413 	for (flags = name; p->b_mask && flags < &name[sizeof(name) - 2]; p++)
414 		if (p->b_mask & f)
415 			*flags++ = p->b_val;
416 	*flags = '\0';
417 	printf(format, name);
418 }
419 
420 char *
421 routename(struct sockaddr *sa)
422 {
423 	char *cp = NULL;
424 	static int first = 1;
425 
426 	if (first) {
427 		first = 0;
428 		if (gethostname(domain, sizeof(domain)) == 0 &&
429 		    (cp = strchr(domain, '.')))
430 			(void)strlcpy(domain, cp + 1, sizeof(domain));
431 		else
432 			domain[0] = '\0';
433 		cp = NULL;
434 	}
435 
436 	if (sa->sa_len == 0) {
437 		(void)strlcpy(line, "default", sizeof(line));
438 		return (line);
439 	}
440 
441 	switch (sa->sa_family) {
442 	case AF_INET:
443 		return
444 		    (routename4(((struct sockaddr_in *)sa)->sin_addr.s_addr));
445 
446 	case AF_INET6:
447 	    {
448 		struct sockaddr_in6 sin6;
449 
450 		memset(&sin6, 0, sizeof(sin6));
451 		memcpy(&sin6, sa, sa->sa_len);
452 		sin6.sin6_family = AF_INET6;
453 		if (sa->sa_len == sizeof(struct sockaddr_in6) &&
454 		    (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
455 		     IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr) ||
456 		     IN6_IS_ADDR_MC_INTFACELOCAL(&sin6.sin6_addr)) &&
457 		    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 		return (routename6(&sin6));
464 	    }
465 
466 	case AF_LINK:
467 		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 }
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 	if (in == INADDR_ANY)
496 		cp = "default";
497 	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 	ina.s_addr = in;
507 	strlcpy(line, cp ? cp : inet_ntoa(ina), sizeof(line));
508 
509 	return (line);
510 }
511 
512 char *
513 routename6(struct sockaddr_in6 *sin6)
514 {
515 	int	 niflags = 0;
516 
517 	if (nflag)
518 		niflags |= NI_NUMERICHOST;
519 	else
520 		niflags |= NI_NOFQDN;
521 
522 	if (getnameinfo((struct sockaddr *)sin6, sizeof(*sin6),
523 	    line, sizeof(line), NULL, 0, niflags) != 0)
524 		strncpy(line, "invalid", sizeof(line));
525 
526 	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 	in = ntohl(in);
539 	mask = ntohl(mask);
540 	mbits = mask ? 33 - ffs(mask) : 0;
541 	if (in == INADDR_ANY && mask == INADDR_ANY)
542 		strlcpy(line, "default", sizeof(line));
543 #define C(x)	((x) & 0xff)
544 	else if (mbits < 9)
545 		snprintf(line, sizeof(line), "%u/%d", C(in >> 24), mbits);
546 	else if (mbits < 17)
547 		snprintf(line, sizeof(line), "%u.%u/%d",
548 		    C(in >> 24) , C(in >> 16), mbits);
549 	else if (mbits < 25)
550 		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 	return (line);
557 }
558 
559 char *
560 netname6(struct sockaddr_in6 *sa6, struct sockaddr_in6 *mask)
561 {
562 	struct sockaddr_in6 sin6;
563 	u_char *p;
564 	int masklen, final = 0, illegal = 0;
565 	int i, lim, flag, error;
566 	char hbuf[NI_MAXHOST];
567 
568 	sin6 = *sa6;
569 
570 	flag = 0;
571 	masklen = 0;
572 	if (mask) {
573 		lim = mask->sin6_len - offsetof(struct sockaddr_in6, sin6_addr);
574 		lim = lim < (int)sizeof(struct in6_addr) ?
575 		    lim : (int)sizeof(struct in6_addr);
576 		for (p = (u_char *)&mask->sin6_addr, i = 0; i < lim; p++) {
577 			if (final && *p) {
578 				illegal++;
579 				sin6.sin6_addr.s6_addr[i++] = 0x00;
580 				continue;
581 			}
582 
583 			switch (*p & 0xff) {
584 			case 0xff:
585 				masklen += 8;
586 				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 				masklen += 4;
601 				final++;
602 				break;
603 			case 0xe0:
604 				masklen += 3;
605 				final++;
606 				break;
607 			case 0xc0:
608 				masklen += 2;
609 				final++;
610 				break;
611 			case 0x80:
612 				masklen += 1;
613 				final++;
614 				break;
615 			case 0x00:
616 				final++;
617 				break;
618 			default:
619 				final++;
620 				illegal++;
621 				break;
622 			}
623 
624 			if (!illegal)
625 				sin6.sin6_addr.s6_addr[i++] &= *p;
626 			else
627 				sin6.sin6_addr.s6_addr[i++] = 0x00;
628 		}
629 		while (i < (int)sizeof(struct in6_addr))
630 			sin6.sin6_addr.s6_addr[i++] = 0x00;
631 	} else
632 		masklen = 128;
633 
634 	if (masklen == 0 && IN6_IS_ADDR_UNSPECIFIED(&sin6.sin6_addr))
635 		return ("default");
636 
637 	if (illegal)
638 		warnx("illegal prefixlen");
639 
640 	if (nflag)
641 		flag |= NI_NUMERICHOST;
642 	error = getnameinfo((struct sockaddr *)&sin6, sizeof(sin6),
643 	    hbuf, sizeof(hbuf), NULL, 0, flag);
644 	if (error)
645 		snprintf(hbuf, sizeof(hbuf), "invalid");
646 
647 	snprintf(line, sizeof(line), "%s/%d", hbuf, masklen);
648 	return (line);
649 }
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 	switch (sa->sa_family) {
659 	case AF_INET:
660 		return netname4(((struct sockaddr_in *)sa)->sin_addr.s_addr,
661 		    mask->sa_len == 0 ? 0 :
662 		    ((struct sockaddr_in *)mask)->sin_addr.s_addr);
663 	case AF_INET6:
664 		return netname6((struct sockaddr_in6 *)sa,
665 		    (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 }
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 	struct sockaddr_dl	*sdl = (struct sockaddr_dl *)sa;
702 	u_char			*lla = (u_char *)sdl->sdl_data + sdl->sdl_nlen;
703 
704 	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 	switch (sdl->sdl_type) {
710 	case IFT_ETHER:
711 	case IFT_CARP:
712 		return (ether_ntoa((struct ether_addr *)lla));
713 	default:
714 		return (link_ntoa(sdl));
715 	}
716 }
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 }
748