xref: /netbsd-src/usr.sbin/ndp/ndp.c (revision d909946ca08dceb44d7d0f22ec9488679695d976)
1 /*	$NetBSD: ndp.c,v 1.47 2016/04/04 07:37:08 ozaki-r Exp $	*/
2 /*	$KAME: ndp.c,v 1.121 2005/07/13 11:30:13 keiichi Exp $	*/
3 
4 /*
5  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
6  * 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 project 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 PROJECT 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 PROJECT 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  * Copyright (c) 1984, 1993
34  *	The Regents of the University of California.  All rights reserved.
35  *
36  * This code is derived from software contributed to Berkeley by
37  * Sun Microsystems, Inc.
38  *
39  * Redistribution and use in source and binary forms, with or without
40  * modification, are permitted provided that the following conditions
41  * are met:
42  * 1. Redistributions of source code must retain the above copyright
43  *    notice, this list of conditions and the following disclaimer.
44  * 2. Redistributions in binary form must reproduce the above copyright
45  *    notice, this list of conditions and the following disclaimer in the
46  *    documentation and/or other materials provided with the distribution.
47  * 3. Neither the name of the University nor the names of its contributors
48  *    may be used to endorse or promote products derived from this software
49  *    without specific prior written permission.
50  *
51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61  * SUCH DAMAGE.
62  */
63 
64 /*
65  * Based on:
66  * "@(#) Copyright (c) 1984, 1993\n\
67  *	The Regents of the University of California.  All rights reserved.\n";
68  *
69  * "@(#)arp.c	8.2 (Berkeley) 1/2/94";
70  */
71 
72 /*
73  * ndp - display, set, delete and flush neighbor cache
74  */
75 
76 
77 #include <sys/param.h>
78 #include <sys/file.h>
79 #include <sys/ioctl.h>
80 #include <sys/socket.h>
81 #include <sys/sysctl.h>
82 #include <sys/time.h>
83 
84 #include <net/if.h>
85 #include <net/if_dl.h>
86 #include <net/if_types.h>
87 #include <net/route.h>
88 
89 #include <netinet/in.h>
90 
91 #include <netinet/icmp6.h>
92 #include <netinet6/in6_var.h>
93 #include <netinet6/nd6.h>
94 
95 #include <arpa/inet.h>
96 
97 #include <netdb.h>
98 #include <errno.h>
99 #include <nlist.h>
100 #include <stdio.h>
101 #include <string.h>
102 #include <paths.h>
103 #include <err.h>
104 #include <stdlib.h>
105 #include <fcntl.h>
106 #include <unistd.h>
107 
108 #include "gmt2local.h"
109 #include "prog_ops.h"
110 
111 static pid_t pid;
112 static int nflag;
113 static int tflag;
114 static int32_t thiszone;	/* time difference with gmt */
115 static int my_s = -1;
116 static unsigned int repeat = 0;
117 
118 
119 static char host_buf[NI_MAXHOST];		/* getnameinfo() */
120 static char ifix_buf[IFNAMSIZ];		/* if_indextoname() */
121 
122 static void getsocket(void);
123 static int set(int, char **);
124 static void get(char *);
125 static int delete(char *);
126 static void dump(struct in6_addr *, int);
127 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, unsigned int, int);
128 static char *ether_str(struct sockaddr_dl *);
129 static int ndp_ether_aton(char *, u_char *);
130 __dead static void usage(void);
131 static int rtmsg(int);
132 static void ifinfo(char *, int, char **);
133 static void rtrlist(void);
134 static void plist(void);
135 static void pfx_flush(void);
136 static void rtrlist(void);
137 static void rtr_flush(void);
138 static void harmonize_rtr(void);
139 #ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
140 static void getdefif(void);
141 static void setdefif(char *);
142 #endif
143 static const char *sec2str(time_t);
144 static char *ether_str(struct sockaddr_dl *);
145 static void ts_print(const struct timeval *);
146 
147 #ifdef ICMPV6CTL_ND6_DRLIST
148 static const char *rtpref_str[] = {
149 	"medium",		/* 00 */
150 	"high",			/* 01 */
151 	"rsv",			/* 10 */
152 	"low"			/* 11 */
153 };
154 #endif
155 
156 static int mode = 0;
157 static char *arg = NULL;
158 
159 int
160 main(int argc, char **argv)
161 {
162 	int ch;
163 
164 	while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
165 		switch (ch) {
166 		case 'a':
167 		case 'c':
168 		case 'p':
169 		case 'r':
170 		case 'H':
171 		case 'P':
172 		case 'R':
173 		case 's':
174 		case 'I':
175 			if (mode) {
176 				usage();
177 				/*NOTREACHED*/
178 			}
179 			mode = ch;
180 			arg = NULL;
181 			break;
182 		case 'd':
183 		case 'f':
184 		case 'i' :
185 			if (mode) {
186 				usage();
187 				/*NOTREACHED*/
188 			}
189 			mode = ch;
190 			arg = optarg;
191 			break;
192 		case 'n':
193 			nflag = 1;
194 			break;
195 		case 't':
196 			tflag = 1;
197 			break;
198 		case 'A':
199 			if (mode) {
200 				usage();
201 				/*NOTREACHED*/
202 			}
203 			mode = 'a';
204 			repeat = atoi(optarg);
205 			break;
206 		default:
207 			usage();
208 		}
209 
210 	argc -= optind;
211 	argv += optind;
212 
213 	if (prog_init && prog_init() == -1)
214 		err(1, "init failed");
215 
216 	pid = prog_getpid();
217 	thiszone = gmt2local(0L);
218 
219 	switch (mode) {
220 	case 'a':
221 	case 'c':
222 		if (argc != 0) {
223 			usage();
224 			/*NOTREACHED*/
225 		}
226 		dump(0, mode == 'c');
227 		break;
228 	case 'd':
229 		if (argc != 0) {
230 			usage();
231 			/*NOTREACHED*/
232 		}
233 		(void)delete(arg);
234 		break;
235 	case 'I':
236 #ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
237 		if (argc > 1) {
238 			usage();
239 			/*NOTREACHED*/
240 		} else if (argc == 1) {
241 			if (strcmp(*argv, "delete") == 0 ||
242 			    if_nametoindex(*argv))
243 				setdefif(*argv);
244 			else
245 				errx(1, "invalid interface %s", *argv);
246 		}
247 		getdefif(); /* always call it to print the result */
248 		break;
249 #else
250 		errx(1, "not supported yet");
251 		/*NOTREACHED*/
252 #endif
253 	case 'p':
254 		if (argc != 0) {
255 			usage();
256 			/*NOTREACHED*/
257 		}
258 		plist();
259 		break;
260 	case 'i':
261 		ifinfo(arg, argc, argv);
262 		break;
263 	case 'r':
264 		if (argc != 0) {
265 			usage();
266 			/*NOTREACHED*/
267 		}
268 		rtrlist();
269 		break;
270 	case 's':
271 		if (argc < 2 || argc > 4)
272 			usage();
273 		return(set(argc, argv) ? 1 : 0);
274 	case 'H':
275 		if (argc != 0) {
276 			usage();
277 			/*NOTREACHED*/
278 		}
279 		harmonize_rtr();
280 		break;
281 	case 'P':
282 		if (argc != 0) {
283 			usage();
284 			/*NOTREACHED*/
285 		}
286 		pfx_flush();
287 		break;
288 	case 'R':
289 		if (argc != 0) {
290 			usage();
291 			/*NOTREACHED*/
292 		}
293 		rtr_flush();
294 		break;
295 	case 0:
296 		if (argc != 1) {
297 			usage();
298 			/*NOTREACHED*/
299 		}
300 		get(argv[0]);
301 		break;
302 	}
303 	return(0);
304 }
305 
306 static void
307 makeaddr(struct sockaddr_in6 *mysin, const void *resp)
308 {
309 	const struct sockaddr_in6 *res = resp;
310 	mysin->sin6_addr = res->sin6_addr;
311 	mysin->sin6_scope_id = res->sin6_scope_id;
312 	inet6_putscopeid(mysin, INET6_IS_ADDR_LINKLOCAL);
313 }
314 
315 static void
316 getsocket(void)
317 {
318 	if (my_s < 0) {
319 		my_s = prog_socket(PF_ROUTE, SOCK_RAW, 0);
320 		if (my_s < 0)
321 			err(1, "socket");
322 	}
323 }
324 
325 #ifdef notdef
326 static struct sockaddr_in6 so_mask = {
327 	.sin6_len = sizeof(so_mask),
328 	.sin6_family = AF_INET6
329 };
330 #endif
331 static struct sockaddr_in6 blank_sin = {
332 	.sin6_len = sizeof(blank_sin),
333 	.sin6_family = AF_INET6
334 };
335 static struct sockaddr_in6 sin_m;
336 static struct sockaddr_dl blank_sdl = {
337 	.sdl_len = sizeof(blank_sdl),
338 	.sdl_family = AF_LINK,
339 };
340 static struct sockaddr_dl sdl_m;
341 static int expire_time, flags, found_entry;
342 static struct {
343 	struct	rt_msghdr m_rtm;
344 	char	m_space[512];
345 } m_rtmsg;
346 
347 /*
348  * Set an individual neighbor cache entry
349  */
350 static int
351 set(int argc, char **argv)
352 {
353 	register struct sockaddr_in6 *mysin = &sin_m;
354 	register struct sockaddr_dl *sdl;
355 	register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
356 	struct addrinfo hints, *res;
357 	int gai_error;
358 	u_char *ea;
359 	char *host = argv[0], *eaddr = argv[1];
360 
361 	getsocket();
362 	argc -= 2;
363 	argv += 2;
364 	sdl_m = blank_sdl;
365 	sin_m = blank_sin;
366 
367 	(void)memset(&hints, 0, sizeof(hints));
368 	hints.ai_family = AF_INET6;
369 	gai_error = getaddrinfo(host, NULL, &hints, &res);
370 	if (gai_error) {
371 		warnx("%s: %s", host, gai_strerror(gai_error));
372 		return 1;
373 	}
374 	makeaddr(mysin, res->ai_addr);
375 	ea = (u_char *)LLADDR(&sdl_m);
376 	if (ndp_ether_aton(eaddr, ea) == 0)
377 		sdl_m.sdl_alen = 6;
378 	flags = expire_time = 0;
379 	while (argc-- > 0) {
380 		if (strncmp(argv[0], "temp", 4) == 0) {
381 			struct timeval tim;
382 
383 			(void)gettimeofday(&tim, 0);
384 			expire_time = tim.tv_sec + 20 * 60;
385 		} else if (strncmp(argv[0], "proxy", 5) == 0)
386 			flags |= RTF_ANNOUNCE;
387 		argv++;
388 	}
389 	if (rtmsg(RTM_GET) < 0) {
390 		errx(1, "RTM_GET(%s) failed", host);
391 		/* NOTREACHED */
392 	}
393 	mysin = (struct sockaddr_in6 *)(void *)(rtm + 1);
394 	sdl = (struct sockaddr_dl *)(void *)(RT_ROUNDUP(mysin->sin6_len) + (char *)(void *)mysin);
395 	if (IN6_ARE_ADDR_EQUAL(&mysin->sin6_addr, &sin_m.sin6_addr)) {
396 		if (sdl->sdl_family == AF_LINK &&
397 		    !(rtm->rtm_flags & RTF_GATEWAY)) {
398 			switch (sdl->sdl_type) {
399 			case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
400 			case IFT_ISO88024: case IFT_ISO88025:
401 				goto overwrite;
402 			}
403 		}
404 		/*
405 		 * IPv4 arp command retries with sin_other = SIN_PROXY here.
406 		 */
407 		(void)fprintf(stderr, "set: cannot configure a new entry\n");
408 		return 1;
409 	}
410 
411 overwrite:
412 	if (sdl->sdl_family != AF_LINK) {
413 		warnx("cannot intuit interface index and type for %s", host);
414 		return (1);
415 	}
416 	sdl_m.sdl_type = sdl->sdl_type;
417 	sdl_m.sdl_index = sdl->sdl_index;
418 	return (rtmsg(RTM_ADD));
419 }
420 
421 /*
422  * Display an individual neighbor cache entry
423  */
424 static void
425 get(char *host)
426 {
427 	struct sockaddr_in6 *mysin = &sin_m;
428 	struct addrinfo hints, *res;
429 	int gai_error;
430 
431 	sin_m = blank_sin;
432 	(void)memset(&hints, 0, sizeof(hints));
433 	hints.ai_family = AF_INET6;
434 	gai_error = getaddrinfo(host, NULL, &hints, &res);
435 	if (gai_error) {
436 		warnx("%s: %s", host, gai_strerror(gai_error));
437 		return;
438 	}
439 	makeaddr(mysin, res->ai_addr);
440 	dump(&mysin->sin6_addr, 0);
441 	if (found_entry == 0) {
442 		(void)getnameinfo((struct sockaddr *)(void *)mysin,
443 		    (socklen_t)mysin->sin6_len,
444 		    host_buf, sizeof(host_buf), NULL ,0,
445 		    (nflag ? NI_NUMERICHOST : 0));
446 		errx(1, "%s (%s) -- no entry", host, host_buf);
447 	}
448 }
449 
450 /*
451  * Delete a neighbor cache entry
452  */
453 static int
454 delete(char *host)
455 {
456 	struct sockaddr_in6 *mysin = &sin_m;
457 	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
458 	struct sockaddr_dl *sdl;
459 	struct addrinfo hints, *res;
460 	int gai_error;
461 
462 	getsocket();
463 	sin_m = blank_sin;
464 
465 	bzero(&hints, sizeof(hints));
466 	hints.ai_family = AF_INET6;
467 	gai_error = getaddrinfo(host, NULL, &hints, &res);
468 	if (gai_error) {
469 		warnx("%s: %s", host, gai_strerror(gai_error));
470 		return 1;
471 	}
472 	makeaddr(mysin, res->ai_addr);
473 	if (rtmsg(RTM_GET) < 0)
474 		errx(1, "RTM_GET(%s) failed", host);
475 	mysin = (struct sockaddr_in6 *)(void *)(rtm + 1);
476 	sdl = (struct sockaddr_dl *)(void *)(RT_ROUNDUP(mysin->sin6_len) +
477 	    (char *)(void *)mysin);
478 	if (IN6_ARE_ADDR_EQUAL(&mysin->sin6_addr, &sin_m.sin6_addr)) {
479 		if (sdl->sdl_family == AF_LINK &&
480 		    !(rtm->rtm_flags & RTF_GATEWAY)) {
481 			goto delete;
482 		}
483 		/*
484 		 * IPv4 arp command retries with sin_other = SIN_PROXY here.
485 		 */
486 		warnx("delete: cannot delete non-NDP entry");
487 		return 1;
488 	}
489 
490 delete:
491 	if (sdl->sdl_family != AF_LINK) {
492 		(void)printf("cannot locate %s\n", host);
493 		return (1);
494 	}
495 	if (rtmsg(RTM_DELETE) == 0) {
496 		struct sockaddr_in6 s6 = *mysin; /* XXX: for safety */
497 
498 		mysin->sin6_scope_id = 0;
499 		inet6_putscopeid(mysin, INET6_IS_ADDR_LINKLOCAL);
500 		(void)getnameinfo((struct sockaddr *)(void *)&s6,
501 		    (socklen_t)s6.sin6_len, host_buf,
502 		    sizeof(host_buf), NULL, 0,
503 		    (nflag ? NI_NUMERICHOST : 0));
504 		(void)printf("%s (%s) deleted\n", host, host_buf);
505 	}
506 
507 	return 0;
508 }
509 
510 #define W_ADDR	36
511 #define W_LL	17
512 #define W_IF	6
513 
514 /*
515  * Dump the entire neighbor cache
516  */
517 static void
518 dump(struct in6_addr *addr, int cflag)
519 {
520 	int mib[6];
521 	size_t needed;
522 	char *lim, *buf, *next;
523 	struct rt_msghdr *rtm;
524 	struct sockaddr_in6 *mysin;
525 	struct sockaddr_dl *sdl;
526 	struct in6_nbrinfo *nbi;
527 	struct timeval tim;
528 	int addrwidth;
529 	int llwidth;
530 	int ifwidth;
531 	char flgbuf[8];
532 	const char *ifname;
533 
534 	/* Print header */
535 	if (!tflag && !cflag)
536 		(void)printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
537 		    W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
538 		    W_IF, W_IF, "Netif", "Expire", "S", "Flags");
539 
540 again:;
541 	mib[0] = CTL_NET;
542 	mib[1] = PF_ROUTE;
543 	mib[2] = 0;
544 	mib[3] = AF_INET6;
545 	mib[4] = NET_RT_FLAGS;
546 	mib[5] = 0;
547 	if (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
548 		err(1, "sysctl(PF_ROUTE estimate)");
549 	if (needed > 0) {
550 		if ((buf = malloc(needed)) == NULL)
551 			err(1, "malloc");
552 		if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
553 			err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
554 		lim = buf + needed;
555 	} else
556 		buf = lim = NULL;
557 
558 	for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
559 		int isrouter = 0, prbs = 0;
560 
561 		rtm = (struct rt_msghdr *)(void *)next;
562 		mysin = (struct sockaddr_in6 *)(void *)(rtm + 1);
563 		sdl = (struct sockaddr_dl *)(void *)((char *)(void *)mysin + RT_ROUNDUP(mysin->sin6_len));
564 
565 		/*
566 		 * Some OSes can produce a route that has the LINK flag but
567 		 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
568 		 * and BSD/OS, where xx is not the interface identifier on
569 		 * lo0).  Such routes entry would annoy getnbrinfo() below,
570 		 * so we skip them.
571 		 * XXX: such routes should have the GATEWAY flag, not the
572 		 * LINK flag.  However, there is rotten routing software
573 		 * that advertises all routes that have the GATEWAY flag.
574 		 * Thus, KAME kernel intentionally does not set the LINK flag.
575 		 * What is to be fixed is not ndp, but such routing software
576 		 * (and the kernel workaround)...
577 		 */
578 		if (sdl->sdl_family != AF_LINK)
579 			continue;
580 
581 		if (!(rtm->rtm_flags & RTF_HOST))
582 			continue;
583 
584 		if (addr) {
585 			if (!IN6_ARE_ADDR_EQUAL(addr, &mysin->sin6_addr))
586 				continue;
587 			found_entry = 1;
588 		} else if (IN6_IS_ADDR_MULTICAST(&mysin->sin6_addr))
589 			continue;
590 		if (IN6_IS_ADDR_LINKLOCAL(&mysin->sin6_addr) ||
591 		    IN6_IS_ADDR_MC_LINKLOCAL(&mysin->sin6_addr)) {
592 			uint16_t scopeid = mysin->sin6_scope_id;
593 			inet6_getscopeid(mysin, INET6_IS_ADDR_LINKLOCAL|
594 			    INET6_IS_ADDR_MC_LINKLOCAL);
595 			if (scopeid == 0)
596 				mysin->sin6_scope_id = sdl->sdl_index;
597 		}
598 		(void)getnameinfo((struct sockaddr *)(void *)mysin,
599 		    (socklen_t)mysin->sin6_len,
600 		    host_buf, sizeof(host_buf), NULL, 0,
601 		    (nflag ? NI_NUMERICHOST : 0));
602 		if (cflag) {
603 			if ((rtm->rtm_flags & RTF_STATIC) == 0)
604 				(void)delete(host_buf);
605 			continue;
606 		}
607 		(void)gettimeofday(&tim, 0);
608 		if (tflag)
609 			ts_print(&tim);
610 
611 		addrwidth = strlen(host_buf);
612 		if (addrwidth < W_ADDR)
613 			addrwidth = W_ADDR;
614 		llwidth = strlen(ether_str(sdl));
615 		if (W_ADDR + W_LL - addrwidth > llwidth)
616 			llwidth = W_ADDR + W_LL - addrwidth;
617 		ifname = if_indextoname((unsigned int)sdl->sdl_index, ifix_buf);
618 		if (!ifname)
619 			ifname = "?";
620 		ifwidth = strlen(ifname);
621 		if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
622 			ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
623 
624 		(void)printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth,
625 		    host_buf, llwidth, llwidth, ether_str(sdl), ifwidth,
626 		    ifwidth, ifname);
627 
628 		/* Print neighbor discovery specific informations */
629 		nbi = getnbrinfo(&mysin->sin6_addr,
630 		    (unsigned int)sdl->sdl_index, 1);
631 		if (nbi) {
632 			if (nbi->expire > tim.tv_sec) {
633 				(void)printf(" %-9.9s",
634 				    sec2str(nbi->expire - tim.tv_sec));
635 			} else if (nbi->expire == 0)
636 				(void)printf(" %-9.9s", "permanent");
637 			else
638 				(void)printf(" %-9.9s", "expired");
639 
640 			switch (nbi->state) {
641 			case ND6_LLINFO_NOSTATE:
642 				 (void)printf(" N");
643 				 break;
644 #ifdef ND6_LLINFO_WAITDELETE
645 			case ND6_LLINFO_WAITDELETE:
646 				 (void)printf(" W");
647 				 break;
648 #endif
649 			case ND6_LLINFO_INCOMPLETE:
650 				 (void)printf(" I");
651 				 break;
652 			case ND6_LLINFO_REACHABLE:
653 				 (void)printf(" R");
654 				 break;
655 			case ND6_LLINFO_STALE:
656 				 (void)printf(" S");
657 				 break;
658 			case ND6_LLINFO_DELAY:
659 				 (void)printf(" D");
660 				 break;
661 			case ND6_LLINFO_PROBE:
662 				 (void)printf(" P");
663 				 break;
664 			default:
665 				 (void)printf(" ?");
666 				 break;
667 			}
668 
669 			isrouter = nbi->isrouter;
670 			prbs = nbi->asked;
671 		} else {
672 			warnx("failed to get neighbor information");
673 			(void)printf("  ");
674 		}
675 
676 		/*
677 		 * other flags. R: router, P: proxy, W: ??
678 		 */
679 		if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
680 			(void)snprintf(flgbuf, sizeof(flgbuf), "%s%s",
681 			    isrouter ? "R" : "",
682 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
683 		} else {
684 			mysin = (struct sockaddr_in6 *)(void *)
685 			    (sdl->sdl_len + (char *)(void *)sdl);
686 #if 0	/* W and P are mystery even for us */
687 			(void)snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
688 			    isrouter ? "R" : "",
689 			    !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
690 			    (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
691 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
692 #else
693 			(void)snprintf(flgbuf, sizeof(flgbuf), "%s%s",
694 			    isrouter ? "R" : "",
695 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
696 #endif
697 		}
698 		(void)printf(" %s", flgbuf);
699 
700 		if (prbs)
701 			(void)printf(" %d", prbs);
702 
703 		(void)printf("\n");
704 	}
705 	if (buf != NULL)
706 		free(buf);
707 
708 	if (repeat) {
709 		(void)printf("\n");
710 		(void)fflush(stdout);
711 		(void)sleep(repeat);
712 		goto again;
713 	}
714 }
715 
716 static struct in6_nbrinfo *
717 getnbrinfo(struct in6_addr *addr, unsigned int ifindex, int warning)
718 {
719 	static struct in6_nbrinfo nbi;
720 	int s;
721 
722 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
723 		err(1, "socket");
724 
725 	(void)memset(&nbi, 0, sizeof(nbi));
726 	(void)if_indextoname(ifindex, nbi.ifname);
727 	nbi.addr = *addr;
728 	if (prog_ioctl(s, SIOCGNBRINFO_IN6, &nbi) < 0) {
729 		if (warning)
730 			warn("ioctl(SIOCGNBRINFO_IN6)");
731 		(void)prog_close(s);
732 		return(NULL);
733 	}
734 
735 	(void)prog_close(s);
736 	return(&nbi);
737 }
738 
739 static char *
740 ether_str(struct sockaddr_dl *sdl)
741 {
742 	static char hbuf[NI_MAXHOST];
743 
744 	if (sdl->sdl_alen) {
745 		if (getnameinfo((struct sockaddr *)(void *)sdl,
746 		    (socklen_t)sdl->sdl_len,
747 		    hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
748 			(void)snprintf(hbuf, sizeof(hbuf), "<invalid>");
749 	} else
750 		(void)snprintf(hbuf, sizeof(hbuf), "(incomplete)");
751 
752 	return(hbuf);
753 }
754 
755 static int
756 ndp_ether_aton(char *a, u_char *n)
757 {
758 	int i, o[6];
759 
760 	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
761 	    &o[3], &o[4], &o[5]);
762 	if (i != 6) {
763 		warnx("invalid Ethernet address '%s'", a);
764 		return (1);
765 	}
766 	for (i = 0; i < 6; i++)
767 		n[i] = o[i];
768 	return (0);
769 }
770 
771 static void
772 usage(void)
773 {
774 	const char *pn = getprogname();
775 
776 	(void)fprintf(stderr, "Usage: %s [-nt] hostname\n", pn);
777 	(void)fprintf(stderr,
778 	    "       %s [-nt] -a | -c | -p | -r | -H | -P | -R\n", pn);
779 	(void)fprintf(stderr, "       %s [-nt] -A wait\n", pn);
780 	(void)fprintf(stderr, "       %s [-nt] -d hostname\n", pn);
781 	(void)fprintf(stderr, "       %s [-nt] -f filename\n", pn);
782 	(void)fprintf(stderr, "       %s [-nt] -i interface [flags...]\n", pn);
783 #ifdef SIOCSDEFIFACE_IN6
784 	(void)fprintf(stderr, "       %s [-nt] -I [interface|delete]\n", pn);
785 #endif
786 	(void)fprintf(stderr,
787 	    "       %s [-nt] -s nodename etheraddr [temp] [proxy]\n", pn);
788 	exit(1);
789 }
790 
791 static int
792 rtmsg(int cmd)
793 {
794 	static int seq;
795 	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
796 	register char *cp = m_rtmsg.m_space;
797 	register int l;
798 
799 	errno = 0;
800 	if (cmd == RTM_DELETE) {
801 		rtm->rtm_flags |= RTF_LLDATA;
802 		goto doit;
803 	}
804 	(void)memset(&m_rtmsg, 0, sizeof(m_rtmsg));
805 	rtm->rtm_flags = flags;
806 	rtm->rtm_version = RTM_VERSION;
807 
808 	switch (cmd) {
809 	default:
810 		errx(1, "internal wrong cmd");
811 		/*NOTREACHED*/
812 	case RTM_ADD:
813 		rtm->rtm_addrs |= RTA_GATEWAY;
814 		if (expire_time) {
815 			rtm->rtm_rmx.rmx_expire = expire_time;
816 			rtm->rtm_inits = RTV_EXPIRE;
817 		}
818 		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
819 #ifdef notdef	/* we don't support ipv6addr/128 type proxying. */
820 		if (rtm->rtm_flags & RTF_ANNOUNCE) {
821 			rtm->rtm_flags &= ~RTF_HOST;
822 			rtm->rtm_addrs |= RTA_NETMASK;
823 		}
824 #endif
825 		rtm->rtm_addrs |= RTA_DST;
826 		break;
827 	case RTM_GET:
828 		rtm->rtm_flags |= RTF_LLDATA;
829 		rtm->rtm_addrs |= RTA_DST | RTA_IFP;
830 	}
831 #define NEXTADDR(w, s) \
832 	if (rtm->rtm_addrs & (w)) { \
833 		(void)memcpy(cp, &s, sizeof(s)); \
834 		RT_ADVANCE(cp, (struct sockaddr *)(void *)&s); \
835 	}
836 
837 	NEXTADDR(RTA_DST, sin_m);
838 	NEXTADDR(RTA_GATEWAY, sdl_m);
839 #ifdef notdef	/* we don't support ipv6addr/128 type proxying. */
840 	(void)memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
841 	NEXTADDR(RTA_NETMASK, so_mask);
842 #endif
843 
844 	rtm->rtm_msglen = cp - (char *)(void *)&m_rtmsg;
845 doit:
846 	l = rtm->rtm_msglen;
847 	rtm->rtm_seq = ++seq;
848 	rtm->rtm_type = cmd;
849 	if (prog_write(my_s, &m_rtmsg, (size_t)l) == -1) {
850 		if (errno != ESRCH || cmd != RTM_DELETE)
851 			err(1, "writing to routing socket");
852 	}
853 	do {
854 		l = prog_read(my_s, &m_rtmsg, sizeof(m_rtmsg));
855 	} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
856 	if (l < 0)
857 		warn("read from routing socket");
858 	return (0);
859 }
860 
861 static void
862 ifinfo(char *ifname, int argc, char **argv)
863 {
864 	struct in6_ndireq nd;
865 	int i, s;
866 	u_int32_t newflags;
867 #ifdef IPV6CTL_USETEMPADDR
868 	u_int8_t nullbuf[8];
869 #endif
870 
871 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
872 		err(1, "socket");
873 	(void)memset(&nd, 0, sizeof(nd));
874 	(void)strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
875 	if (prog_ioctl(s, SIOCGIFINFO_IN6, &nd) < 0)
876 		err(1, "ioctl(SIOCGIFINFO_IN6)");
877 #define ND nd.ndi
878 	newflags = ND.flags;
879 	for (i = 0; i < argc; i++) {
880 		int clear = 0;
881 		char *cp = argv[i];
882 
883 		if (*cp == '-') {
884 			clear = 1;
885 			cp++;
886 		}
887 
888 #define SETFLAG(s, f) \
889 	do {\
890 		if (strcmp(cp, (s)) == 0) {\
891 			if (clear)\
892 				newflags &= ~(f);\
893 			else\
894 				newflags |= (f);\
895 		}\
896 	} while (/*CONSTCOND*/0)
897 /*
898  * XXX: this macro is not 100% correct, in that it matches "nud" against
899  *      "nudbogus".  But we just let it go since this is minor.
900  */
901 #define SETVALUE(f, v) \
902 	do { \
903 		char *valptr; \
904 		unsigned long newval; \
905 		v = 0; /* unspecified */ \
906 		if (strncmp(cp, f, strlen(f)) == 0) { \
907 			valptr = strchr(cp, '='); \
908 			if (valptr == NULL) \
909 				err(1, "syntax error in %s field", (f)); \
910 			errno = 0; \
911 			newval = strtoul(++valptr, NULL, 0); \
912 			if (errno) \
913 				err(1, "syntax error in %s's value", (f)); \
914 			v = newval; \
915 		} \
916 	} while (/*CONSTCOND*/0)
917 
918 #ifdef ND6_IFF_IFDISABLED
919 		SETFLAG("disabled", ND6_IFF_IFDISABLED);
920 #endif
921 		SETFLAG("nud", ND6_IFF_PERFORMNUD);
922 #ifdef ND6_IFF_ACCEPT_RTADV
923 		SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
924 #endif
925 #ifdef ND6_IFF_OVERRIDE_RTADV
926 		SETFLAG("override_rtadv", ND6_IFF_OVERRIDE_RTADV);
927 #endif
928 #ifdef ND6_IFF_AUTO_LINKLOCAL
929 		SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
930 #endif
931 #ifdef ND6_IFF_PREFER_SOURCE
932 		SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE);
933 #endif
934 #ifdef ND6_IFF_DONT_SET_IFROUTE
935 		SETFLAG("dont_set_ifroute", ND6_IFF_DONT_SET_IFROUTE);
936 #endif
937 		SETVALUE("basereachable", ND.basereachable);
938 		SETVALUE("retrans", ND.retrans);
939 		SETVALUE("curhlim", ND.chlim);
940 
941 		ND.flags = newflags;
942 #ifdef SIOCSIFINFO_IN6
943 		if (prog_ioctl(s, SIOCSIFINFO_IN6, &nd) < 0)
944 			err(1, "ioctl(SIOCSIFINFO_IN6)");
945 #else
946 		if (prog_ioctl(s, SIOCSIFINFO_FLAGS, &nd) < 0)
947 			err(1, "ioctl(SIOCSIFINFO_FLAGS)");
948 #endif
949 #undef SETFLAG
950 #undef SETVALUE
951 	}
952 
953 	if (!ND.initialized)
954 		errx(1, "%s: not initialized yet", ifname);
955 
956 	if (prog_ioctl(s, SIOCGIFINFO_IN6, &nd) < 0)
957 		err(1, "ioctl(SIOCGIFINFO_IN6)");
958 	(void)printf("linkmtu=%d", ND.linkmtu);
959 	(void)printf(", maxmtu=%d", ND.maxmtu);
960 	(void)printf(", curhlim=%d", ND.chlim);
961 	(void)printf(", basereachable=%ds%dms",
962 	    ND.basereachable / 1000, ND.basereachable % 1000);
963 	(void)printf(", reachable=%ds", ND.reachable);
964 	(void)printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
965 #ifdef IPV6CTL_USETEMPADDR
966 	(void)memset(nullbuf, 0, sizeof(nullbuf));
967 	if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
968 		int j;
969 		u_int8_t *rbuf;
970 
971 		for (i = 0; i < 3; i++) {
972 			switch (i) {
973 			case 0:
974 				(void)printf("\nRandom seed(0): ");
975 				rbuf = ND.randomseed0;
976 				break;
977 			case 1:
978 				(void)printf("\nRandom seed(1): ");
979 				rbuf = ND.randomseed1;
980 				break;
981 			case 2:
982 				(void)printf("\nRandom ID:      ");
983 				rbuf = ND.randomid;
984 				break;
985 			default:
986 				errx(1, "impossible case for tempaddr display");
987 			}
988 			for (j = 0; j < 8; j++)
989 				(void)printf("%02x", rbuf[j]);
990 		}
991 	}
992 #endif
993 	if (ND.flags) {
994 		(void)printf("\nFlags: ");
995 		if ((ND.flags & ND6_IFF_PERFORMNUD))
996 			(void)printf("nud ");
997 #ifdef ND6_IFF_IFDISABLED
998 		if ((ND.flags & ND6_IFF_IFDISABLED))
999 			(void)printf("disabled ");
1000 #endif
1001 #ifdef ND6_IFF_ACCEPT_RTADV
1002 		if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1003 			(void)printf("accept_rtadv ");
1004 #endif
1005 #ifdef ND6_IFF_OVERRIDE_RTADV
1006 		if ((ND.flags & ND6_IFF_OVERRIDE_RTADV))
1007 			(void)printf("override_rtadv ");
1008 #endif
1009 #ifdef ND6_IFF_AUTO_LINKLOCAL
1010 		if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1011 			(void)printf("auto_linklocal ");
1012 #endif
1013 #ifdef ND6_IFF_PREFER_SOURCE
1014 		if ((ND.flags & ND6_IFF_PREFER_SOURCE))
1015 			(void)printf("prefer_source ");
1016 #endif
1017 	}
1018 	(void)putc('\n', stdout);
1019 #undef ND
1020 
1021 	(void)prog_close(s);
1022 }
1023 
1024 #ifndef ND_RA_FLAG_RTPREF_MASK	/* XXX: just for compilation on *BSD release */
1025 #define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
1026 #endif
1027 
1028 static void
1029 rtrlist(void)
1030 {
1031 #ifdef ICMPV6CTL_ND6_DRLIST
1032 	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1033 	char *buf;
1034 	struct in6_defrouter *p, *ep;
1035 	size_t l;
1036 	struct timeval tim;
1037 
1038 	if (prog_sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1039 		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1040 		/*NOTREACHED*/
1041 	}
1042 	if (l == 0)
1043 		return;
1044 	buf = malloc(l);
1045 	if (!buf) {
1046 		err(1, "malloc");
1047 		/*NOTREACHED*/
1048 	}
1049 	if (prog_sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1050 		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1051 		/*NOTREACHED*/
1052 	}
1053 
1054 	ep = (struct in6_defrouter *)(void *)(buf + l);
1055 	for (p = (struct in6_defrouter *)(void *)buf; p < ep; p++) {
1056 		int rtpref;
1057 
1058 		if (getnameinfo((struct sockaddr *)(void *)&p->rtaddr,
1059 		    (socklen_t)p->rtaddr.sin6_len, host_buf, sizeof(host_buf),
1060 		    NULL, 0, (nflag ? NI_NUMERICHOST : 0)) != 0)
1061 			(void)strlcpy(host_buf, "?", sizeof(host_buf));
1062 
1063 		(void)printf("%s if=%s", host_buf,
1064 		    if_indextoname((unsigned int)p->if_index, ifix_buf));
1065 		(void)printf(", flags=%s%s",
1066 		    p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1067 		    p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1068 		rtpref = ((uint32_t)(p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1069 		(void)printf(", pref=%s", rtpref_str[rtpref]);
1070 
1071 		(void)gettimeofday(&tim, 0);
1072 		if (p->expire == 0)
1073 			(void)printf(", expire=Never\n");
1074 		else
1075 			(void)printf(", expire=%s\n",
1076 			    sec2str((time_t)(p->expire - tim.tv_sec)));
1077 	}
1078 	free(buf);
1079 #else
1080 	struct in6_drlist dr;
1081 	int s, i;
1082 	struct timeval time;
1083 
1084 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1085 		err(1, "socket");
1086 		/* NOTREACHED */
1087 	}
1088 	(void)memset(&dr, 0, sizeof(dr));
1089 	(void)strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1090 	if (prog_ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1091 		err(1, "ioctl(SIOCGDRLST_IN6)");
1092 		/* NOTREACHED */
1093 	}
1094 #define DR dr.defrouter[i]
1095 	for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1096 		struct sockaddr_in6 sin6;
1097 
1098 		(void)memset(&sin6, 0, sizeof(sin6));
1099 		sin6.sin6_family = AF_INET6;
1100 		sin6.sin6_len = sizeof(sin6);
1101 		sin6.sin6_addr = DR.rtaddr;
1102 		(void)getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
1103 		    host_buf, sizeof(host_buf), NULL, 0,
1104 		    (nflag ? NI_NUMERICHOST : 0));
1105 
1106 		(void)printf("%s if=%s", host_buf,
1107 		    if_indextoname(DR.if_index, ifix_buf));
1108 		(void)printf(", flags=%s%s",
1109 		    DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1110 		    DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1111 		gettimeofday(&time, 0);
1112 		if (DR.expire == 0)
1113 			(void)printf(", expire=Never\n");
1114 		else
1115 			(void)printf(", expire=%s\n",
1116 			    sec2str(DR.expire - time.tv_sec));
1117 	}
1118 #undef DR
1119 	(void)prog_close(s);
1120 #endif
1121 }
1122 
1123 static void
1124 plist(void)
1125 {
1126 #ifdef ICMPV6CTL_ND6_PRLIST
1127 	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1128 	char *buf, *p, *ep;
1129 	struct in6_prefix pfx;
1130 	size_t l;
1131 	struct timeval tim;
1132 	const int niflags = NI_NUMERICHOST;
1133 	int ninflags = nflag ? NI_NUMERICHOST : 0;
1134 	char namebuf[NI_MAXHOST];
1135 
1136 	if (prog_sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1137 		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1138 		/*NOTREACHED*/
1139 	}
1140 	buf = malloc(l);
1141 	if (!buf) {
1142 		err(1, "malloc");
1143 		/*NOTREACHED*/
1144 	}
1145 	if (prog_sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1146 		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1147 		/*NOTREACHED*/
1148 	}
1149 
1150 	ep = buf + l;
1151 	for (p = buf; p < ep; ) {
1152 		memcpy(&pfx, p, sizeof(pfx));
1153 		p += sizeof(pfx);
1154 
1155 		if (getnameinfo((struct sockaddr*)&pfx.prefix,
1156 		    (socklen_t)pfx.prefix.sin6_len, namebuf, sizeof(namebuf),
1157 		    NULL, 0, niflags) != 0)
1158 			(void)strlcpy(namebuf, "?", sizeof(namebuf));
1159 		(void)printf("%s/%d if=%s\n", namebuf, pfx.prefixlen,
1160 		    if_indextoname((unsigned int)pfx.if_index, ifix_buf));
1161 
1162 		(void)gettimeofday(&tim, 0);
1163 		/*
1164 		 * meaning of fields, especially flags, is very different
1165 		 * by origin.  notify the difference to the users.
1166 		 */
1167 		(void)printf("flags=%s%s%s%s%s",
1168 		    pfx.raflags.onlink ? "L" : "",
1169 		    pfx.raflags.autonomous ? "A" : "",
1170 		    (pfx.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1171 		    (pfx.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1172 #ifdef NDPRF_HOME
1173 		    (pfx.flags & NDPRF_HOME) != 0 ? "H" : ""
1174 #else
1175 		    ""
1176 #endif
1177 		    );
1178 		if (pfx.vltime == ND6_INFINITE_LIFETIME)
1179 			(void)printf(" vltime=infinity");
1180 		else
1181 			(void)printf(" vltime=%lu", (unsigned long)pfx.vltime);
1182 		if (pfx.pltime == ND6_INFINITE_LIFETIME)
1183 			(void)printf(", pltime=infinity");
1184 		else
1185 			(void)printf(", pltime=%lu", (unsigned long)pfx.pltime);
1186 		if (pfx.expire == 0)
1187 			(void)printf(", expire=Never");
1188 		else if (pfx.expire >= tim.tv_sec)
1189 			(void)printf(", expire=%s",
1190 			    sec2str(pfx.expire - tim.tv_sec));
1191 		else
1192 			(void)printf(", expired");
1193 		(void)printf(", ref=%d", pfx.refcnt);
1194 		(void)printf("\n");
1195 		/*
1196 		 * "advertising router" list is meaningful only if the prefix
1197 		 * information is from RA.
1198 		 */
1199 		if (pfx.advrtrs) {
1200 			int j;
1201 			struct sockaddr_in6 sin6;
1202 
1203 			(void)printf("  advertised by\n");
1204 			for (j = 0; j < pfx.advrtrs && p <= ep; j++) {
1205 				struct in6_nbrinfo *nbi;
1206 
1207 				memcpy(&sin6, p, sizeof(sin6));
1208 				p += sizeof(sin6);
1209 
1210 				if (getnameinfo((struct sockaddr *)&sin6,
1211 				    (socklen_t)sin6.sin6_len, namebuf,
1212 				    sizeof(namebuf), NULL, 0, ninflags) != 0)
1213 					(void)strlcpy(namebuf, "?", sizeof(namebuf));
1214 				(void)printf("    %s", namebuf);
1215 
1216 				nbi = getnbrinfo(&sin6.sin6_addr,
1217 				    (unsigned int)pfx.if_index, 0);
1218 				if (nbi) {
1219 					switch (nbi->state) {
1220 					case ND6_LLINFO_REACHABLE:
1221 					case ND6_LLINFO_STALE:
1222 					case ND6_LLINFO_DELAY:
1223 					case ND6_LLINFO_PROBE:
1224 						(void)printf(" (reachable)\n");
1225 						break;
1226 					default:
1227 						(void)printf(" (unreachable)\n");
1228 					}
1229 				} else
1230 					(void)printf(" (no neighbor state)\n");
1231 			}
1232 		} else
1233 			(void)printf("  No advertising router\n");
1234 	}
1235 	free(buf);
1236 #else
1237 	struct in6_prlist pr;
1238 	int s, i;
1239 	struct timeval time;
1240 
1241 	(void)gettimeofday(&time, 0);
1242 
1243 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1244 		err(1, "socket");
1245 		/* NOTREACHED */
1246 	}
1247 	(void)memset(&pr, 0, sizeof(pr));
1248 	(void)strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1249 	if (prog_ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1250 		err(1, "ioctl(SIOCGPRLST_IN6)");
1251 		/* NOTREACHED */
1252 	}
1253 #define PR pr.prefix[i]
1254 	for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1255 		struct sockaddr_in6 p6;
1256 		char namebuf[NI_MAXHOST];
1257 		int niflags;
1258 
1259 #ifdef NDPRF_ONLINK
1260 		p6 = PR.prefix;
1261 #else
1262 		(void)memset(&p6, 0, sizeof(p6));
1263 		p6.sin6_family = AF_INET6;
1264 		p6.sin6_len = sizeof(p6);
1265 		p6.sin6_addr = PR.prefix;
1266 #endif
1267 
1268 		niflags = NI_NUMERICHOST;
1269 		if (getnameinfo((struct sockaddr *)&p6,
1270 		    sizeof(p6), namebuf, sizeof(namebuf),
1271 		    NULL, 0, niflags)) {
1272 			warnx("getnameinfo failed");
1273 			continue;
1274 		}
1275 		(void)printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1276 		    if_indextoname(PR.if_index, ifix_buf));
1277 
1278 		(void)gettimeofday(&time, 0);
1279 		/*
1280 		 * meaning of fields, especially flags, is very different
1281 		 * by origin.  notify the difference to the users.
1282 		 */
1283 #if 0
1284 		(void)printf("  %s",
1285 		    PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1286 #endif
1287 #ifdef NDPRF_ONLINK
1288 		(void)printf("flags=%s%s%s%s%s",
1289 		    PR.raflags.onlink ? "L" : "",
1290 		    PR.raflags.autonomous ? "A" : "",
1291 		    (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1292 		    (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1293 #ifdef NDPRF_HOME
1294 		    (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1295 #else
1296 		    ""
1297 #endif
1298 		    );
1299 #else
1300 		(void)printf("flags=%s%s",
1301 		    PR.raflags.onlink ? "L" : "",
1302 		    PR.raflags.autonomous ? "A" : "");
1303 #endif
1304 		if (PR.vltime == ND6_INFINITE_LIFETIME)
1305 			(void)printf(" vltime=infinity");
1306 		else
1307 			(void)printf(" vltime=%lu", PR.vltime);
1308 		if (PR.pltime == ND6_INFINITE_LIFETIME)
1309 			(void)printf(", pltime=infinity");
1310 		else
1311 			(void)printf(", pltime=%lu", PR.pltime);
1312 		if (PR.expire == 0)
1313 			(void)printf(", expire=Never");
1314 		else if (PR.expire >= time.tv_sec)
1315 			(void)printf(", expire=%s",
1316 			    sec2str(PR.expire - time.tv_sec));
1317 		else
1318 			(void)printf(", expired");
1319 #ifdef NDPRF_ONLINK
1320 		(void)printf(", ref=%d", PR.refcnt);
1321 #endif
1322 #if 0
1323 		switch (PR.origin) {
1324 		case PR_ORIG_RA:
1325 			(void)printf(", origin=RA");
1326 			break;
1327 		case PR_ORIG_RR:
1328 			(void)printf(", origin=RR");
1329 			break;
1330 		case PR_ORIG_STATIC:
1331 			(void)printf(", origin=static");
1332 			break;
1333 		case PR_ORIG_KERNEL:
1334 			(void)printf(", origin=kernel");
1335 			break;
1336 		default:
1337 			(void)printf(", origin=?");
1338 			break;
1339 		}
1340 #endif
1341 		(void)printf("\n");
1342 		/*
1343 		 * "advertising router" list is meaningful only if the prefix
1344 		 * information is from RA.
1345 		 */
1346 		if (0 &&	/* prefix origin is almost obsolted */
1347 		    PR.origin != PR_ORIG_RA)
1348 			;
1349 		else if (PR.advrtrs) {
1350 			int j;
1351 			(void)printf("  advertised by\n");
1352 			for (j = 0; j < PR.advrtrs; j++) {
1353 				struct sockaddr_in6 sin6;
1354 				struct in6_nbrinfo *nbi;
1355 
1356 				bzero(&sin6, sizeof(sin6));
1357 				sin6.sin6_family = AF_INET6;
1358 				sin6.sin6_len = sizeof(sin6);
1359 				sin6.sin6_addr = PR.advrtr[j];
1360 				sin6.sin6_scope_id = PR.if_index; /* XXX */
1361 				(void)getnameinfo((struct sockaddr *)&sin6,
1362 				    sin6.sin6_len, host_buf,
1363 				    sizeof(host_buf), NULL, 0,
1364 				    (nflag ? NI_NUMERICHOST : 0));
1365 				(void)printf("    %s", host_buf);
1366 
1367 				nbi = getnbrinfo(&sin6.sin6_addr,
1368 				    PR.if_index, 0);
1369 				if (nbi) {
1370 					switch (nbi->state) {
1371 					case ND6_LLINFO_REACHABLE:
1372 					case ND6_LLINFO_STALE:
1373 					case ND6_LLINFO_DELAY:
1374 					case ND6_LLINFO_PROBE:
1375 						 (void)printf(" (reachable)\n");
1376 						 break;
1377 					default:
1378 						 (void)printf(" (unreachable)\n");
1379 					}
1380 				} else
1381 					(void)printf(" (no neighbor state)\n");
1382 			}
1383 			if (PR.advrtrs > DRLSTSIZ)
1384 				(void)printf("    and %d routers\n",
1385 				    PR.advrtrs - DRLSTSIZ);
1386 		} else
1387 			(void)printf("  No advertising router\n");
1388 	}
1389 #undef PR
1390 	(void)prog_close(s);
1391 #endif
1392 }
1393 
1394 static void
1395 pfx_flush(void)
1396 {
1397 	char dummyif[IFNAMSIZ+8];
1398 	int s;
1399 
1400 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1401 		err(1, "socket");
1402 	(void)strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1403 	if (prog_ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1404 		err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1405 	(void)prog_close(s);
1406 }
1407 
1408 static void
1409 rtr_flush(void)
1410 {
1411 	char dummyif[IFNAMSIZ+8];
1412 	int s;
1413 
1414 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1415 		err(1, "socket");
1416 	(void)strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1417 	if (prog_ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1418 		err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1419 
1420 	(void)prog_close(s);
1421 }
1422 
1423 static void
1424 harmonize_rtr(void)
1425 {
1426 	char dummyif[IFNAMSIZ+8];
1427 	int s;
1428 
1429 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1430 		err(1, "socket");
1431 	(void)strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1432 	if (prog_ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1433 		err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1434 
1435 	(void)prog_close(s);
1436 }
1437 
1438 #ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
1439 static void
1440 setdefif(char *ifname)
1441 {
1442 	struct in6_ndifreq ndifreq;
1443 	unsigned int ifindex;
1444 	int s;
1445 
1446 	if (strcasecmp(ifname, "delete") == 0)
1447 		ifindex = 0;
1448 	else {
1449 		if ((ifindex = if_nametoindex(ifname)) == 0)
1450 			err(1, "failed to resolve i/f index for %s", ifname);
1451 	}
1452 
1453 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1454 		err(1, "socket");
1455 
1456 	(void)strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1457 	ndifreq.ifindex = ifindex;
1458 
1459 	if (prog_ioctl(s, SIOCSDEFIFACE_IN6, &ndifreq) < 0)
1460 		err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1461 
1462 	(void)prog_close(s);
1463 }
1464 
1465 static void
1466 getdefif(void)
1467 {
1468 	struct in6_ndifreq ndifreq;
1469 	char ifname[IFNAMSIZ+8];
1470 	int s;
1471 
1472 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1473 		err(1, "socket");
1474 
1475 	(void)memset(&ndifreq, 0, sizeof(ndifreq));
1476 	(void)strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1477 
1478 	if (prog_ioctl(s, SIOCGDEFIFACE_IN6, &ndifreq) < 0)
1479 		err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1480 
1481 	if (ndifreq.ifindex == 0)
1482 		(void)printf("No default interface.\n");
1483 	else {
1484 		if ((if_indextoname((unsigned int)ndifreq.ifindex, ifname)) == NULL)
1485 			err(1, "failed to resolve ifname for index %lu",
1486 			    ndifreq.ifindex);
1487 		(void)printf("ND default interface = %s\n", ifname);
1488 	}
1489 
1490 	(void)prog_close(s);
1491 }
1492 #endif
1493 
1494 static const char *
1495 sec2str(time_t total)
1496 {
1497 	static char result[256];
1498 	int days, hours, mins, secs;
1499 	int first = 1;
1500 	char *p = result;
1501 	char *ep = &result[sizeof(result)];
1502 	int n;
1503 
1504 	days = total / 3600 / 24;
1505 	hours = (total / 3600) % 24;
1506 	mins = (total / 60) % 60;
1507 	secs = total % 60;
1508 
1509 	if (days) {
1510 		first = 0;
1511 		n = snprintf(p, (size_t)(ep - p), "%dd", days);
1512 		if (n < 0 || n >= ep - p)
1513 			return "?";
1514 		p += n;
1515 	}
1516 	if (!first || hours) {
1517 		first = 0;
1518 		n = snprintf(p, (size_t)(ep - p), "%dh", hours);
1519 		if (n < 0 || n >= ep - p)
1520 			return "?";
1521 		p += n;
1522 	}
1523 	if (!first || mins) {
1524 		first = 0;
1525 		n = snprintf(p, (size_t)(ep - p), "%dm", mins);
1526 		if (n < 0 || n >= ep - p)
1527 			return "?";
1528 		p += n;
1529 	}
1530 	(void)snprintf(p, (size_t)(ep - p), "%ds", secs);
1531 
1532 	return(result);
1533 }
1534 
1535 /*
1536  * Print the timestamp
1537  * from tcpdump/util.c
1538  */
1539 static void
1540 ts_print(const struct timeval *tvp)
1541 {
1542 	int s;
1543 
1544 	/* Default */
1545 	s = (tvp->tv_sec + thiszone) % 86400;
1546 	(void)printf("%02d:%02d:%02d.%06u ",
1547 	    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1548 }
1549