xref: /netbsd-src/usr.sbin/ndp/ndp.c (revision e89934bbf778a6d6d6894877c4da59d0c7835b0f)
1 /*	$NetBSD: ndp.c,v 1.48 2016/09/19 19:13:14 christos 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	(8 * 4 + 7)
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], *fl;
532 	const char *ifname;
533 
534 	/* Print header */
535 	if (!tflag && !cflag)
536 		(void)printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %2s\n",
537 		    W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
538 		    W_IF, W_IF, "Netif", "Expire", "S", "Fl");
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 		fl = flgbuf;
680 		if (isrouter)
681 			*fl++ = 'R';
682 		if (rtm->rtm_flags & RTF_ANNOUNCE)
683 			*fl++ = 'p';
684 		*fl++ = '\0';
685 		(void)printf(" %s", flgbuf);
686 
687 		if (prbs)
688 			(void)printf(" %d", prbs);
689 
690 		(void)printf("\n");
691 	}
692 	if (buf != NULL)
693 		free(buf);
694 
695 	if (repeat) {
696 		(void)printf("\n");
697 		(void)fflush(stdout);
698 		(void)sleep(repeat);
699 		goto again;
700 	}
701 }
702 
703 static struct in6_nbrinfo *
704 getnbrinfo(struct in6_addr *addr, unsigned int ifindex, int warning)
705 {
706 	static struct in6_nbrinfo nbi;
707 	int s;
708 
709 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
710 		err(1, "socket");
711 
712 	(void)memset(&nbi, 0, sizeof(nbi));
713 	(void)if_indextoname(ifindex, nbi.ifname);
714 	nbi.addr = *addr;
715 	if (prog_ioctl(s, SIOCGNBRINFO_IN6, &nbi) < 0) {
716 		if (warning)
717 			warn("ioctl(SIOCGNBRINFO_IN6)");
718 		(void)prog_close(s);
719 		return(NULL);
720 	}
721 
722 	(void)prog_close(s);
723 	return(&nbi);
724 }
725 
726 static char *
727 ether_str(struct sockaddr_dl *sdl)
728 {
729 	static char hbuf[NI_MAXHOST];
730 
731 	if (sdl->sdl_alen) {
732 		if (getnameinfo((struct sockaddr *)(void *)sdl,
733 		    (socklen_t)sdl->sdl_len,
734 		    hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
735 			(void)snprintf(hbuf, sizeof(hbuf), "<invalid>");
736 	} else
737 		(void)snprintf(hbuf, sizeof(hbuf), "(incomplete)");
738 
739 	return(hbuf);
740 }
741 
742 static int
743 ndp_ether_aton(char *a, u_char *n)
744 {
745 	int i, o[6];
746 
747 	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
748 	    &o[3], &o[4], &o[5]);
749 	if (i != 6) {
750 		warnx("invalid Ethernet address '%s'", a);
751 		return (1);
752 	}
753 	for (i = 0; i < 6; i++)
754 		n[i] = o[i];
755 	return (0);
756 }
757 
758 static void
759 usage(void)
760 {
761 	const char *pn = getprogname();
762 
763 	(void)fprintf(stderr, "Usage: %s [-nt] hostname\n", pn);
764 	(void)fprintf(stderr,
765 	    "       %s [-nt] -a | -c | -p | -r | -H | -P | -R\n", pn);
766 	(void)fprintf(stderr, "       %s [-nt] -A wait\n", pn);
767 	(void)fprintf(stderr, "       %s [-nt] -d hostname\n", pn);
768 	(void)fprintf(stderr, "       %s [-nt] -f filename\n", pn);
769 	(void)fprintf(stderr, "       %s [-nt] -i interface [flags...]\n", pn);
770 #ifdef SIOCSDEFIFACE_IN6
771 	(void)fprintf(stderr, "       %s [-nt] -I [interface|delete]\n", pn);
772 #endif
773 	(void)fprintf(stderr,
774 	    "       %s [-nt] -s nodename etheraddr [temp] [proxy]\n", pn);
775 	exit(1);
776 }
777 
778 static int
779 rtmsg(int cmd)
780 {
781 	static int seq;
782 	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
783 	register char *cp = m_rtmsg.m_space;
784 	register int l;
785 
786 	errno = 0;
787 	if (cmd == RTM_DELETE) {
788 		rtm->rtm_flags |= RTF_LLDATA;
789 		goto doit;
790 	}
791 	(void)memset(&m_rtmsg, 0, sizeof(m_rtmsg));
792 	rtm->rtm_flags = flags;
793 	rtm->rtm_version = RTM_VERSION;
794 
795 	switch (cmd) {
796 	default:
797 		errx(1, "internal wrong cmd");
798 		/*NOTREACHED*/
799 	case RTM_ADD:
800 		rtm->rtm_addrs |= RTA_GATEWAY;
801 		if (expire_time) {
802 			rtm->rtm_rmx.rmx_expire = expire_time;
803 			rtm->rtm_inits = RTV_EXPIRE;
804 		}
805 		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
806 #ifdef notdef	/* we don't support ipv6addr/128 type proxying. */
807 		if (rtm->rtm_flags & RTF_ANNOUNCE) {
808 			rtm->rtm_flags &= ~RTF_HOST;
809 			rtm->rtm_addrs |= RTA_NETMASK;
810 		}
811 #endif
812 		rtm->rtm_addrs |= RTA_DST;
813 		break;
814 	case RTM_GET:
815 		rtm->rtm_flags |= RTF_LLDATA;
816 		rtm->rtm_addrs |= RTA_DST | RTA_IFP;
817 	}
818 #define NEXTADDR(w, s) \
819 	if (rtm->rtm_addrs & (w)) { \
820 		(void)memcpy(cp, &s, sizeof(s)); \
821 		RT_ADVANCE(cp, (struct sockaddr *)(void *)&s); \
822 	}
823 
824 	NEXTADDR(RTA_DST, sin_m);
825 	NEXTADDR(RTA_GATEWAY, sdl_m);
826 #ifdef notdef	/* we don't support ipv6addr/128 type proxying. */
827 	(void)memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
828 	NEXTADDR(RTA_NETMASK, so_mask);
829 #endif
830 
831 	rtm->rtm_msglen = cp - (char *)(void *)&m_rtmsg;
832 doit:
833 	l = rtm->rtm_msglen;
834 	rtm->rtm_seq = ++seq;
835 	rtm->rtm_type = cmd;
836 	if (prog_write(my_s, &m_rtmsg, (size_t)l) == -1) {
837 		if (errno != ESRCH || cmd != RTM_DELETE)
838 			err(1, "writing to routing socket");
839 	}
840 	do {
841 		l = prog_read(my_s, &m_rtmsg, sizeof(m_rtmsg));
842 	} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
843 	if (l < 0)
844 		warn("read from routing socket");
845 	return (0);
846 }
847 
848 static void
849 ifinfo(char *ifname, int argc, char **argv)
850 {
851 	struct in6_ndireq nd;
852 	int i, s;
853 	u_int32_t newflags;
854 #ifdef IPV6CTL_USETEMPADDR
855 	u_int8_t nullbuf[8];
856 #endif
857 
858 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
859 		err(1, "socket");
860 	(void)memset(&nd, 0, sizeof(nd));
861 	(void)strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
862 	if (prog_ioctl(s, SIOCGIFINFO_IN6, &nd) < 0)
863 		err(1, "ioctl(SIOCGIFINFO_IN6)");
864 #define ND nd.ndi
865 	newflags = ND.flags;
866 	for (i = 0; i < argc; i++) {
867 		int clear = 0;
868 		char *cp = argv[i];
869 
870 		if (*cp == '-') {
871 			clear = 1;
872 			cp++;
873 		}
874 
875 #define SETFLAG(s, f) \
876 	do {\
877 		if (strcmp(cp, (s)) == 0) {\
878 			if (clear)\
879 				newflags &= ~(f);\
880 			else\
881 				newflags |= (f);\
882 		}\
883 	} while (/*CONSTCOND*/0)
884 /*
885  * XXX: this macro is not 100% correct, in that it matches "nud" against
886  *      "nudbogus".  But we just let it go since this is minor.
887  */
888 #define SETVALUE(f, v) \
889 	do { \
890 		char *valptr; \
891 		unsigned long newval; \
892 		v = 0; /* unspecified */ \
893 		if (strncmp(cp, f, strlen(f)) == 0) { \
894 			valptr = strchr(cp, '='); \
895 			if (valptr == NULL) \
896 				err(1, "syntax error in %s field", (f)); \
897 			errno = 0; \
898 			newval = strtoul(++valptr, NULL, 0); \
899 			if (errno) \
900 				err(1, "syntax error in %s's value", (f)); \
901 			v = newval; \
902 		} \
903 	} while (/*CONSTCOND*/0)
904 
905 #ifdef ND6_IFF_IFDISABLED
906 		SETFLAG("disabled", ND6_IFF_IFDISABLED);
907 #endif
908 		SETFLAG("nud", ND6_IFF_PERFORMNUD);
909 #ifdef ND6_IFF_ACCEPT_RTADV
910 		SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
911 #endif
912 #ifdef ND6_IFF_OVERRIDE_RTADV
913 		SETFLAG("override_rtadv", ND6_IFF_OVERRIDE_RTADV);
914 #endif
915 #ifdef ND6_IFF_AUTO_LINKLOCAL
916 		SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
917 #endif
918 #ifdef ND6_IFF_PREFER_SOURCE
919 		SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE);
920 #endif
921 #ifdef ND6_IFF_DONT_SET_IFROUTE
922 		SETFLAG("dont_set_ifroute", ND6_IFF_DONT_SET_IFROUTE);
923 #endif
924 		SETVALUE("basereachable", ND.basereachable);
925 		SETVALUE("retrans", ND.retrans);
926 		SETVALUE("curhlim", ND.chlim);
927 
928 		ND.flags = newflags;
929 #ifdef SIOCSIFINFO_IN6
930 		if (prog_ioctl(s, SIOCSIFINFO_IN6, &nd) < 0)
931 			err(1, "ioctl(SIOCSIFINFO_IN6)");
932 #else
933 		if (prog_ioctl(s, SIOCSIFINFO_FLAGS, &nd) < 0)
934 			err(1, "ioctl(SIOCSIFINFO_FLAGS)");
935 #endif
936 #undef SETFLAG
937 #undef SETVALUE
938 	}
939 
940 	if (!ND.initialized)
941 		errx(1, "%s: not initialized yet", ifname);
942 
943 	if (prog_ioctl(s, SIOCGIFINFO_IN6, &nd) < 0)
944 		err(1, "ioctl(SIOCGIFINFO_IN6)");
945 	(void)printf("linkmtu=%d", ND.linkmtu);
946 	(void)printf(", maxmtu=%d", ND.maxmtu);
947 	(void)printf(", curhlim=%d", ND.chlim);
948 	(void)printf(", basereachable=%ds%dms",
949 	    ND.basereachable / 1000, ND.basereachable % 1000);
950 	(void)printf(", reachable=%ds", ND.reachable);
951 	(void)printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
952 #ifdef IPV6CTL_USETEMPADDR
953 	(void)memset(nullbuf, 0, sizeof(nullbuf));
954 	if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
955 		int j;
956 		u_int8_t *rbuf;
957 
958 		for (i = 0; i < 3; i++) {
959 			switch (i) {
960 			case 0:
961 				(void)printf("\nRandom seed(0): ");
962 				rbuf = ND.randomseed0;
963 				break;
964 			case 1:
965 				(void)printf("\nRandom seed(1): ");
966 				rbuf = ND.randomseed1;
967 				break;
968 			case 2:
969 				(void)printf("\nRandom ID:      ");
970 				rbuf = ND.randomid;
971 				break;
972 			default:
973 				errx(1, "impossible case for tempaddr display");
974 			}
975 			for (j = 0; j < 8; j++)
976 				(void)printf("%02x", rbuf[j]);
977 		}
978 	}
979 #endif
980 	if (ND.flags) {
981 		(void)printf("\nFlags: ");
982 		if ((ND.flags & ND6_IFF_PERFORMNUD))
983 			(void)printf("nud ");
984 #ifdef ND6_IFF_IFDISABLED
985 		if ((ND.flags & ND6_IFF_IFDISABLED))
986 			(void)printf("disabled ");
987 #endif
988 #ifdef ND6_IFF_ACCEPT_RTADV
989 		if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
990 			(void)printf("accept_rtadv ");
991 #endif
992 #ifdef ND6_IFF_OVERRIDE_RTADV
993 		if ((ND.flags & ND6_IFF_OVERRIDE_RTADV))
994 			(void)printf("override_rtadv ");
995 #endif
996 #ifdef ND6_IFF_AUTO_LINKLOCAL
997 		if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
998 			(void)printf("auto_linklocal ");
999 #endif
1000 #ifdef ND6_IFF_PREFER_SOURCE
1001 		if ((ND.flags & ND6_IFF_PREFER_SOURCE))
1002 			(void)printf("prefer_source ");
1003 #endif
1004 	}
1005 	(void)putc('\n', stdout);
1006 #undef ND
1007 
1008 	(void)prog_close(s);
1009 }
1010 
1011 #ifndef ND_RA_FLAG_RTPREF_MASK	/* XXX: just for compilation on *BSD release */
1012 #define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
1013 #endif
1014 
1015 static void
1016 rtrlist(void)
1017 {
1018 #ifdef ICMPV6CTL_ND6_DRLIST
1019 	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1020 	char *buf;
1021 	struct in6_defrouter *p, *ep;
1022 	size_t l;
1023 	struct timeval tim;
1024 
1025 	if (prog_sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1026 		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1027 		/*NOTREACHED*/
1028 	}
1029 	if (l == 0)
1030 		return;
1031 	buf = malloc(l);
1032 	if (!buf) {
1033 		err(1, "malloc");
1034 		/*NOTREACHED*/
1035 	}
1036 	if (prog_sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1037 		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1038 		/*NOTREACHED*/
1039 	}
1040 
1041 	ep = (struct in6_defrouter *)(void *)(buf + l);
1042 	for (p = (struct in6_defrouter *)(void *)buf; p < ep; p++) {
1043 		int rtpref;
1044 
1045 		if (getnameinfo((struct sockaddr *)(void *)&p->rtaddr,
1046 		    (socklen_t)p->rtaddr.sin6_len, host_buf, sizeof(host_buf),
1047 		    NULL, 0, (nflag ? NI_NUMERICHOST : 0)) != 0)
1048 			(void)strlcpy(host_buf, "?", sizeof(host_buf));
1049 
1050 		(void)printf("%s if=%s", host_buf,
1051 		    if_indextoname((unsigned int)p->if_index, ifix_buf));
1052 		(void)printf(", flags=%s%s",
1053 		    p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1054 		    p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1055 		rtpref = ((uint32_t)(p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1056 		(void)printf(", pref=%s", rtpref_str[rtpref]);
1057 
1058 		(void)gettimeofday(&tim, 0);
1059 		if (p->expire == 0)
1060 			(void)printf(", expire=Never\n");
1061 		else
1062 			(void)printf(", expire=%s\n",
1063 			    sec2str((time_t)(p->expire - tim.tv_sec)));
1064 	}
1065 	free(buf);
1066 #else
1067 	struct in6_drlist dr;
1068 	int s, i;
1069 	struct timeval time;
1070 
1071 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1072 		err(1, "socket");
1073 		/* NOTREACHED */
1074 	}
1075 	(void)memset(&dr, 0, sizeof(dr));
1076 	(void)strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1077 	if (prog_ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1078 		err(1, "ioctl(SIOCGDRLST_IN6)");
1079 		/* NOTREACHED */
1080 	}
1081 #define DR dr.defrouter[i]
1082 	for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1083 		struct sockaddr_in6 sin6;
1084 
1085 		(void)memset(&sin6, 0, sizeof(sin6));
1086 		sin6.sin6_family = AF_INET6;
1087 		sin6.sin6_len = sizeof(sin6);
1088 		sin6.sin6_addr = DR.rtaddr;
1089 		(void)getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
1090 		    host_buf, sizeof(host_buf), NULL, 0,
1091 		    (nflag ? NI_NUMERICHOST : 0));
1092 
1093 		(void)printf("%s if=%s", host_buf,
1094 		    if_indextoname(DR.if_index, ifix_buf));
1095 		(void)printf(", flags=%s%s",
1096 		    DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1097 		    DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1098 		gettimeofday(&time, 0);
1099 		if (DR.expire == 0)
1100 			(void)printf(", expire=Never\n");
1101 		else
1102 			(void)printf(", expire=%s\n",
1103 			    sec2str(DR.expire - time.tv_sec));
1104 	}
1105 #undef DR
1106 	(void)prog_close(s);
1107 #endif
1108 }
1109 
1110 static void
1111 plist(void)
1112 {
1113 #ifdef ICMPV6CTL_ND6_PRLIST
1114 	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1115 	char *buf, *p, *ep;
1116 	struct in6_prefix pfx;
1117 	size_t l;
1118 	struct timeval tim;
1119 	const int niflags = NI_NUMERICHOST;
1120 	int ninflags = nflag ? NI_NUMERICHOST : 0;
1121 	char namebuf[NI_MAXHOST];
1122 
1123 	if (prog_sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1124 		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1125 		/*NOTREACHED*/
1126 	}
1127 	buf = malloc(l);
1128 	if (!buf) {
1129 		err(1, "malloc");
1130 		/*NOTREACHED*/
1131 	}
1132 	if (prog_sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1133 		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1134 		/*NOTREACHED*/
1135 	}
1136 
1137 	ep = buf + l;
1138 	for (p = buf; p < ep; ) {
1139 		memcpy(&pfx, p, sizeof(pfx));
1140 		p += sizeof(pfx);
1141 
1142 		if (getnameinfo((struct sockaddr*)&pfx.prefix,
1143 		    (socklen_t)pfx.prefix.sin6_len, namebuf, sizeof(namebuf),
1144 		    NULL, 0, niflags) != 0)
1145 			(void)strlcpy(namebuf, "?", sizeof(namebuf));
1146 		(void)printf("%s/%d if=%s\n", namebuf, pfx.prefixlen,
1147 		    if_indextoname((unsigned int)pfx.if_index, ifix_buf));
1148 
1149 		(void)gettimeofday(&tim, 0);
1150 		/*
1151 		 * meaning of fields, especially flags, is very different
1152 		 * by origin.  notify the difference to the users.
1153 		 */
1154 		(void)printf("flags=%s%s%s%s%s",
1155 		    pfx.raflags.onlink ? "L" : "",
1156 		    pfx.raflags.autonomous ? "A" : "",
1157 		    (pfx.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1158 		    (pfx.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1159 #ifdef NDPRF_HOME
1160 		    (pfx.flags & NDPRF_HOME) != 0 ? "H" : ""
1161 #else
1162 		    ""
1163 #endif
1164 		    );
1165 		if (pfx.vltime == ND6_INFINITE_LIFETIME)
1166 			(void)printf(" vltime=infinity");
1167 		else
1168 			(void)printf(" vltime=%lu", (unsigned long)pfx.vltime);
1169 		if (pfx.pltime == ND6_INFINITE_LIFETIME)
1170 			(void)printf(", pltime=infinity");
1171 		else
1172 			(void)printf(", pltime=%lu", (unsigned long)pfx.pltime);
1173 		if (pfx.expire == 0)
1174 			(void)printf(", expire=Never");
1175 		else if (pfx.expire >= tim.tv_sec)
1176 			(void)printf(", expire=%s",
1177 			    sec2str(pfx.expire - tim.tv_sec));
1178 		else
1179 			(void)printf(", expired");
1180 		(void)printf(", ref=%d", pfx.refcnt);
1181 		(void)printf("\n");
1182 		/*
1183 		 * "advertising router" list is meaningful only if the prefix
1184 		 * information is from RA.
1185 		 */
1186 		if (pfx.advrtrs) {
1187 			int j;
1188 			struct sockaddr_in6 sin6;
1189 
1190 			(void)printf("  advertised by\n");
1191 			for (j = 0; j < pfx.advrtrs && p <= ep; j++) {
1192 				struct in6_nbrinfo *nbi;
1193 
1194 				memcpy(&sin6, p, sizeof(sin6));
1195 				p += sizeof(sin6);
1196 
1197 				if (getnameinfo((struct sockaddr *)&sin6,
1198 				    (socklen_t)sin6.sin6_len, namebuf,
1199 				    sizeof(namebuf), NULL, 0, ninflags) != 0)
1200 					(void)strlcpy(namebuf, "?", sizeof(namebuf));
1201 				(void)printf("    %s", namebuf);
1202 
1203 				nbi = getnbrinfo(&sin6.sin6_addr,
1204 				    (unsigned int)pfx.if_index, 0);
1205 				if (nbi) {
1206 					switch (nbi->state) {
1207 					case ND6_LLINFO_REACHABLE:
1208 					case ND6_LLINFO_STALE:
1209 					case ND6_LLINFO_DELAY:
1210 					case ND6_LLINFO_PROBE:
1211 						(void)printf(" (reachable)\n");
1212 						break;
1213 					default:
1214 						(void)printf(" (unreachable)\n");
1215 					}
1216 				} else
1217 					(void)printf(" (no neighbor state)\n");
1218 			}
1219 		} else
1220 			(void)printf("  No advertising router\n");
1221 	}
1222 	free(buf);
1223 #else
1224 	struct in6_prlist pr;
1225 	int s, i;
1226 	struct timeval time;
1227 
1228 	(void)gettimeofday(&time, 0);
1229 
1230 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1231 		err(1, "socket");
1232 		/* NOTREACHED */
1233 	}
1234 	(void)memset(&pr, 0, sizeof(pr));
1235 	(void)strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1236 	if (prog_ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1237 		err(1, "ioctl(SIOCGPRLST_IN6)");
1238 		/* NOTREACHED */
1239 	}
1240 #define PR pr.prefix[i]
1241 	for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1242 		struct sockaddr_in6 p6;
1243 		char namebuf[NI_MAXHOST];
1244 		int niflags;
1245 
1246 #ifdef NDPRF_ONLINK
1247 		p6 = PR.prefix;
1248 #else
1249 		(void)memset(&p6, 0, sizeof(p6));
1250 		p6.sin6_family = AF_INET6;
1251 		p6.sin6_len = sizeof(p6);
1252 		p6.sin6_addr = PR.prefix;
1253 #endif
1254 
1255 		niflags = NI_NUMERICHOST;
1256 		if (getnameinfo((struct sockaddr *)&p6,
1257 		    sizeof(p6), namebuf, sizeof(namebuf),
1258 		    NULL, 0, niflags)) {
1259 			warnx("getnameinfo failed");
1260 			continue;
1261 		}
1262 		(void)printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1263 		    if_indextoname(PR.if_index, ifix_buf));
1264 
1265 		(void)gettimeofday(&time, 0);
1266 		/*
1267 		 * meaning of fields, especially flags, is very different
1268 		 * by origin.  notify the difference to the users.
1269 		 */
1270 #if 0
1271 		(void)printf("  %s",
1272 		    PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1273 #endif
1274 #ifdef NDPRF_ONLINK
1275 		(void)printf("flags=%s%s%s%s%s",
1276 		    PR.raflags.onlink ? "L" : "",
1277 		    PR.raflags.autonomous ? "A" : "",
1278 		    (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1279 		    (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1280 #ifdef NDPRF_HOME
1281 		    (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1282 #else
1283 		    ""
1284 #endif
1285 		    );
1286 #else
1287 		(void)printf("flags=%s%s",
1288 		    PR.raflags.onlink ? "L" : "",
1289 		    PR.raflags.autonomous ? "A" : "");
1290 #endif
1291 		if (PR.vltime == ND6_INFINITE_LIFETIME)
1292 			(void)printf(" vltime=infinity");
1293 		else
1294 			(void)printf(" vltime=%lu", PR.vltime);
1295 		if (PR.pltime == ND6_INFINITE_LIFETIME)
1296 			(void)printf(", pltime=infinity");
1297 		else
1298 			(void)printf(", pltime=%lu", PR.pltime);
1299 		if (PR.expire == 0)
1300 			(void)printf(", expire=Never");
1301 		else if (PR.expire >= time.tv_sec)
1302 			(void)printf(", expire=%s",
1303 			    sec2str(PR.expire - time.tv_sec));
1304 		else
1305 			(void)printf(", expired");
1306 #ifdef NDPRF_ONLINK
1307 		(void)printf(", ref=%d", PR.refcnt);
1308 #endif
1309 #if 0
1310 		switch (PR.origin) {
1311 		case PR_ORIG_RA:
1312 			(void)printf(", origin=RA");
1313 			break;
1314 		case PR_ORIG_RR:
1315 			(void)printf(", origin=RR");
1316 			break;
1317 		case PR_ORIG_STATIC:
1318 			(void)printf(", origin=static");
1319 			break;
1320 		case PR_ORIG_KERNEL:
1321 			(void)printf(", origin=kernel");
1322 			break;
1323 		default:
1324 			(void)printf(", origin=?");
1325 			break;
1326 		}
1327 #endif
1328 		(void)printf("\n");
1329 		/*
1330 		 * "advertising router" list is meaningful only if the prefix
1331 		 * information is from RA.
1332 		 */
1333 		if (0 &&	/* prefix origin is almost obsolted */
1334 		    PR.origin != PR_ORIG_RA)
1335 			;
1336 		else if (PR.advrtrs) {
1337 			int j;
1338 			(void)printf("  advertised by\n");
1339 			for (j = 0; j < PR.advrtrs; j++) {
1340 				struct sockaddr_in6 sin6;
1341 				struct in6_nbrinfo *nbi;
1342 
1343 				bzero(&sin6, sizeof(sin6));
1344 				sin6.sin6_family = AF_INET6;
1345 				sin6.sin6_len = sizeof(sin6);
1346 				sin6.sin6_addr = PR.advrtr[j];
1347 				sin6.sin6_scope_id = PR.if_index; /* XXX */
1348 				(void)getnameinfo((struct sockaddr *)&sin6,
1349 				    sin6.sin6_len, host_buf,
1350 				    sizeof(host_buf), NULL, 0,
1351 				    (nflag ? NI_NUMERICHOST : 0));
1352 				(void)printf("    %s", host_buf);
1353 
1354 				nbi = getnbrinfo(&sin6.sin6_addr,
1355 				    PR.if_index, 0);
1356 				if (nbi) {
1357 					switch (nbi->state) {
1358 					case ND6_LLINFO_REACHABLE:
1359 					case ND6_LLINFO_STALE:
1360 					case ND6_LLINFO_DELAY:
1361 					case ND6_LLINFO_PROBE:
1362 						 (void)printf(" (reachable)\n");
1363 						 break;
1364 					default:
1365 						 (void)printf(" (unreachable)\n");
1366 					}
1367 				} else
1368 					(void)printf(" (no neighbor state)\n");
1369 			}
1370 			if (PR.advrtrs > DRLSTSIZ)
1371 				(void)printf("    and %d routers\n",
1372 				    PR.advrtrs - DRLSTSIZ);
1373 		} else
1374 			(void)printf("  No advertising router\n");
1375 	}
1376 #undef PR
1377 	(void)prog_close(s);
1378 #endif
1379 }
1380 
1381 static void
1382 pfx_flush(void)
1383 {
1384 	char dummyif[IFNAMSIZ+8];
1385 	int s;
1386 
1387 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1388 		err(1, "socket");
1389 	(void)strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1390 	if (prog_ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1391 		err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1392 	(void)prog_close(s);
1393 }
1394 
1395 static void
1396 rtr_flush(void)
1397 {
1398 	char dummyif[IFNAMSIZ+8];
1399 	int s;
1400 
1401 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1402 		err(1, "socket");
1403 	(void)strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1404 	if (prog_ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1405 		err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1406 
1407 	(void)prog_close(s);
1408 }
1409 
1410 static void
1411 harmonize_rtr(void)
1412 {
1413 	char dummyif[IFNAMSIZ+8];
1414 	int s;
1415 
1416 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1417 		err(1, "socket");
1418 	(void)strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1419 	if (prog_ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1420 		err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1421 
1422 	(void)prog_close(s);
1423 }
1424 
1425 #ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
1426 static void
1427 setdefif(char *ifname)
1428 {
1429 	struct in6_ndifreq ndifreq;
1430 	unsigned int ifindex;
1431 	int s;
1432 
1433 	if (strcasecmp(ifname, "delete") == 0)
1434 		ifindex = 0;
1435 	else {
1436 		if ((ifindex = if_nametoindex(ifname)) == 0)
1437 			err(1, "failed to resolve i/f index for %s", ifname);
1438 	}
1439 
1440 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1441 		err(1, "socket");
1442 
1443 	(void)strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1444 	ndifreq.ifindex = ifindex;
1445 
1446 	if (prog_ioctl(s, SIOCSDEFIFACE_IN6, &ndifreq) < 0)
1447 		err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1448 
1449 	(void)prog_close(s);
1450 }
1451 
1452 static void
1453 getdefif(void)
1454 {
1455 	struct in6_ndifreq ndifreq;
1456 	char ifname[IFNAMSIZ+8];
1457 	int s;
1458 
1459 	if ((s = prog_socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1460 		err(1, "socket");
1461 
1462 	(void)memset(&ndifreq, 0, sizeof(ndifreq));
1463 	(void)strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1464 
1465 	if (prog_ioctl(s, SIOCGDEFIFACE_IN6, &ndifreq) < 0)
1466 		err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1467 
1468 	if (ndifreq.ifindex == 0)
1469 		(void)printf("No default interface.\n");
1470 	else {
1471 		if ((if_indextoname((unsigned int)ndifreq.ifindex, ifname)) == NULL)
1472 			err(1, "failed to resolve ifname for index %lu",
1473 			    ndifreq.ifindex);
1474 		(void)printf("ND default interface = %s\n", ifname);
1475 	}
1476 
1477 	(void)prog_close(s);
1478 }
1479 #endif
1480 
1481 static const char *
1482 sec2str(time_t total)
1483 {
1484 	static char result[256];
1485 	int days, hours, mins, secs;
1486 	int first = 1;
1487 	char *p = result;
1488 	char *ep = &result[sizeof(result)];
1489 	int n;
1490 
1491 	days = total / 3600 / 24;
1492 	hours = (total / 3600) % 24;
1493 	mins = (total / 60) % 60;
1494 	secs = total % 60;
1495 
1496 	if (days) {
1497 		first = 0;
1498 		n = snprintf(p, (size_t)(ep - p), "%dd", days);
1499 		if (n < 0 || n >= ep - p)
1500 			return "?";
1501 		p += n;
1502 	}
1503 	if (!first || hours) {
1504 		first = 0;
1505 		n = snprintf(p, (size_t)(ep - p), "%dh", hours);
1506 		if (n < 0 || n >= ep - p)
1507 			return "?";
1508 		p += n;
1509 	}
1510 	if (!first || mins) {
1511 		first = 0;
1512 		n = snprintf(p, (size_t)(ep - p), "%dm", mins);
1513 		if (n < 0 || n >= ep - p)
1514 			return "?";
1515 		p += n;
1516 	}
1517 	(void)snprintf(p, (size_t)(ep - p), "%ds", secs);
1518 
1519 	return(result);
1520 }
1521 
1522 /*
1523  * Print the timestamp
1524  * from tcpdump/util.c
1525  */
1526 static void
1527 ts_print(const struct timeval *tvp)
1528 {
1529 	int s;
1530 
1531 	/* Default */
1532 	s = (tvp->tv_sec + thiszone) % 86400;
1533 	(void)printf("%02d:%02d:%02d.%06u ",
1534 	    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1535 }
1536