xref: /freebsd/usr.sbin/ndp/ndp.c (revision 952364486a4b9d135e4b28f7f88a8703a74eae6f)
1 /*	$FreeBSD$	*/
2 /*	$KAME: ndp.c,v 1.104 2003/06/27 07:48:39 itojun 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  * 4. 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 #include <sys/queue.h>
84 
85 #include <net/if.h>
86 #include <net/if_dl.h>
87 #include <net/if_types.h>
88 #include <net/route.h>
89 
90 #include <netinet/in.h>
91 #include <netinet/if_ether.h>
92 
93 #include <netinet/icmp6.h>
94 #include <netinet6/in6_var.h>
95 #include <netinet6/nd6.h>
96 
97 #include <arpa/inet.h>
98 
99 #include <ctype.h>
100 #include <netdb.h>
101 #include <errno.h>
102 #include <nlist.h>
103 #include <stdio.h>
104 #include <string.h>
105 #include <paths.h>
106 #include <err.h>
107 #include <stdlib.h>
108 #include <fcntl.h>
109 #include <unistd.h>
110 #include "gmt2local.h"
111 
112 #define NEXTADDR(w, s) \
113 	if (rtm->rtm_addrs & (w)) { \
114 		bcopy((char *)&s, cp, sizeof(s)); cp += SA_SIZE(&s);}
115 
116 
117 static pid_t pid;
118 static int nflag;
119 static int tflag;
120 static int32_t thiszone;	/* time difference with gmt */
121 static int s = -1;
122 static int repeat = 0;
123 
124 char ntop_buf[INET6_ADDRSTRLEN];	/* inet_ntop() */
125 char host_buf[NI_MAXHOST];		/* getnameinfo() */
126 char ifix_buf[IFNAMSIZ];		/* if_indextoname() */
127 
128 int main(int, char **);
129 static int file(char *);
130 void getsocket(void);
131 int set(int, char **);
132 void get(char *);
133 int delete(char *);
134 void dump(struct sockaddr_in6 *, int);
135 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
136 static char *ether_str(struct sockaddr_dl *);
137 int ndp_ether_aton(char *, u_char *);
138 void usage(void);
139 int rtmsg(int);
140 void ifinfo(char *, int, char **);
141 void rtrlist(void);
142 void plist(void);
143 void pfx_flush(void);
144 void rtr_flush(void);
145 void harmonize_rtr(void);
146 #ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
147 static void getdefif(void);
148 static void setdefif(char *);
149 #endif
150 static char *sec2str(time_t);
151 static void ts_print(const struct timeval *);
152 
153 #ifdef ICMPV6CTL_ND6_DRLIST
154 static char *rtpref_str[] = {
155 	"medium",		/* 00 */
156 	"high",			/* 01 */
157 	"rsv",			/* 10 */
158 	"low"			/* 11 */
159 };
160 #endif
161 
162 int mode = 0;
163 char *arg = NULL;
164 
165 int
166 main(int argc, char **argv)
167 {
168 	int ch;
169 
170 	pid = getpid();
171 	thiszone = gmt2local(0);
172 	while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
173 		switch (ch) {
174 		case 'a':
175 		case 'c':
176 		case 'p':
177 		case 'r':
178 		case 'H':
179 		case 'P':
180 		case 'R':
181 		case 's':
182 		case 'I':
183 			if (mode) {
184 				usage();
185 				/*NOTREACHED*/
186 			}
187 			mode = ch;
188 			arg = NULL;
189 			break;
190 		case 'f':
191 			exit(file(optarg) ? 1 : 0);
192 		case 'd':
193 		case 'i':
194 			if (mode) {
195 				usage();
196 				/*NOTREACHED*/
197 			}
198 			mode = ch;
199 			arg = optarg;
200 			break;
201 		case 'n':
202 			nflag = 1;
203 			break;
204 		case 't':
205 			tflag = 1;
206 			break;
207 		case 'A':
208 			if (mode) {
209 				usage();
210 				/*NOTREACHED*/
211 			}
212 			mode = 'a';
213 			repeat = atoi(optarg);
214 			if (repeat < 0) {
215 				usage();
216 				/*NOTREACHED*/
217 			}
218 			break;
219 		default:
220 			usage();
221 		}
222 
223 	argc -= optind;
224 	argv += optind;
225 
226 	switch (mode) {
227 	case 'a':
228 	case 'c':
229 		if (argc != 0) {
230 			usage();
231 			/*NOTREACHED*/
232 		}
233 		dump(0, mode == 'c');
234 		break;
235 	case 'd':
236 		if (argc != 0) {
237 			usage();
238 			/*NOTREACHED*/
239 		}
240 		delete(arg);
241 		break;
242 	case 'I':
243 #ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
244 		if (argc > 1) {
245 			usage();
246 			/*NOTREACHED*/
247 		} else if (argc == 1) {
248 			if (strcmp(*argv, "delete") == 0 ||
249 			    if_nametoindex(*argv))
250 				setdefif(*argv);
251 			else
252 				errx(1, "invalid interface %s", *argv);
253 		}
254 		getdefif(); /* always call it to print the result */
255 		break;
256 #else
257 		errx(1, "not supported yet");
258 		/*NOTREACHED*/
259 #endif
260 	case 'p':
261 		if (argc != 0) {
262 			usage();
263 			/*NOTREACHED*/
264 		}
265 		plist();
266 		break;
267 	case 'i':
268 		ifinfo(arg, argc, argv);
269 		break;
270 	case 'r':
271 		if (argc != 0) {
272 			usage();
273 			/*NOTREACHED*/
274 		}
275 		rtrlist();
276 		break;
277 	case 's':
278 		if (argc < 2 || argc > 4)
279 			usage();
280 		exit(set(argc, argv) ? 1 : 0);
281 	case 'H':
282 		if (argc != 0) {
283 			usage();
284 			/*NOTREACHED*/
285 		}
286 		harmonize_rtr();
287 		break;
288 	case 'P':
289 		if (argc != 0) {
290 			usage();
291 			/*NOTREACHED*/
292 		}
293 		pfx_flush();
294 		break;
295 	case 'R':
296 		if (argc != 0) {
297 			usage();
298 			/*NOTREACHED*/
299 		}
300 		rtr_flush();
301 		break;
302 	case 0:
303 		if (argc != 1) {
304 			usage();
305 			/*NOTREACHED*/
306 		}
307 		get(argv[0]);
308 		break;
309 	}
310 	exit(0);
311 }
312 
313 /*
314  * Process a file to set standard ndp entries
315  */
316 static int
317 file(char *name)
318 {
319 	FILE *fp;
320 	int i, retval;
321 	char line[100], arg[5][50], *args[5], *p;
322 
323 	if ((fp = fopen(name, "r")) == NULL)
324 		err(1, "cannot open %s", name);
325 	args[0] = &arg[0][0];
326 	args[1] = &arg[1][0];
327 	args[2] = &arg[2][0];
328 	args[3] = &arg[3][0];
329 	args[4] = &arg[4][0];
330 	retval = 0;
331 	while (fgets(line, sizeof(line), fp) != NULL) {
332 		if ((p = strchr(line, '#')) != NULL)
333 			*p = '\0';
334 		for (p = line; isblank(*p); p++);
335 		if (*p == '\n' || *p == '\0')
336 			continue;
337 		i = sscanf(line, "%49s %49s %49s %49s %49s",
338 		    arg[0], arg[1], arg[2], arg[3], arg[4]);
339 		if (i < 2) {
340 			warnx("bad line: %s", line);
341 			retval = 1;
342 			continue;
343 		}
344 		if (set(i, args))
345 			retval = 1;
346 	}
347 	fclose(fp);
348 	return (retval);
349 }
350 
351 void
352 getsocket()
353 {
354 	if (s < 0) {
355 		s = socket(PF_ROUTE, SOCK_RAW, 0);
356 		if (s < 0) {
357 			err(1, "socket");
358 			/* NOTREACHED */
359 		}
360 	}
361 }
362 
363 struct	sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
364 struct	sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
365 struct	sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
366 time_t	expire_time;
367 int	flags, found_entry;
368 struct	{
369 	struct	rt_msghdr m_rtm;
370 	char	m_space[512];
371 }	m_rtmsg;
372 
373 /*
374  * Set an individual neighbor cache entry
375  */
376 int
377 set(int argc, char **argv)
378 {
379 	register struct sockaddr_in6 *sin = &sin_m;
380 	register struct sockaddr_dl *sdl;
381 	register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
382 	struct addrinfo hints, *res;
383 	int gai_error;
384 	u_char *ea;
385 	char *host = argv[0], *eaddr = argv[1];
386 
387 	getsocket();
388 	argc -= 2;
389 	argv += 2;
390 	sdl_m = blank_sdl;
391 	sin_m = blank_sin;
392 
393 	bzero(&hints, sizeof(hints));
394 	hints.ai_family = AF_INET6;
395 	gai_error = getaddrinfo(host, NULL, &hints, &res);
396 	if (gai_error) {
397 		fprintf(stderr, "ndp: %s: %s\n", host,
398 			gai_strerror(gai_error));
399 		return 1;
400 	}
401 	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
402 	sin->sin6_scope_id =
403 	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
404 	ea = (u_char *)LLADDR(&sdl_m);
405 	if (ndp_ether_aton(eaddr, ea) == 0)
406 		sdl_m.sdl_alen = 6;
407 	flags = expire_time = 0;
408 	while (argc-- > 0) {
409 		if (strncmp(argv[0], "temp", 4) == 0) {
410 			struct timeval now;
411 
412 			gettimeofday(&now, 0);
413 			expire_time = now.tv_sec + 20 * 60;
414 		} else if (strncmp(argv[0], "proxy", 5) == 0)
415 			flags |= RTF_ANNOUNCE;
416 		argv++;
417 	}
418 	if (rtmsg(RTM_GET) < 0) {
419 		errx(1, "RTM_GET(%s) failed", host);
420 		/* NOTREACHED */
421 	}
422 	sin = (struct sockaddr_in6 *)(rtm + 1);
423 	sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
424 	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
425 		if (sdl->sdl_family == AF_LINK &&
426 		    !(rtm->rtm_flags & RTF_GATEWAY)) {
427 			switch (sdl->sdl_type) {
428 			case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
429 			case IFT_ISO88024: case IFT_ISO88025:
430 			case IFT_L2VLAN: case IFT_BRIDGE:
431 				goto overwrite;
432 			}
433 		}
434 		fprintf(stderr, "set: cannot configure a new entry\n");
435 		return 1;
436 	}
437 
438 overwrite:
439 	if (sdl->sdl_family != AF_LINK) {
440 		printf("cannot intuit interface index and type for %s\n", host);
441 		return (1);
442 	}
443 	sdl_m.sdl_type = sdl->sdl_type;
444 	sdl_m.sdl_index = sdl->sdl_index;
445 	return (rtmsg(RTM_ADD));
446 }
447 
448 /*
449  * Display an individual neighbor cache entry
450  */
451 void
452 get(char *host)
453 {
454 	struct sockaddr_in6 *sin = &sin_m;
455 	struct addrinfo hints, *res;
456 	int gai_error;
457 
458 	sin_m = blank_sin;
459 	bzero(&hints, sizeof(hints));
460 	hints.ai_family = AF_INET6;
461 	gai_error = getaddrinfo(host, NULL, &hints, &res);
462 	if (gai_error) {
463 		fprintf(stderr, "ndp: %s: %s\n", host,
464 		    gai_strerror(gai_error));
465 		return;
466 	}
467 	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
468 	sin->sin6_scope_id =
469 	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
470 	dump(sin, 0);
471 	if (found_entry == 0) {
472 		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
473 		    sizeof(host_buf), NULL ,0,
474 		    (nflag ? NI_NUMERICHOST : 0));
475 		printf("%s (%s) -- no entry\n", host, host_buf);
476 		exit(1);
477 	}
478 }
479 
480 /*
481  * Delete a neighbor cache entry
482  */
483 int
484 delete(char *host)
485 {
486 	struct sockaddr_in6 *sin = &sin_m;
487 	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
488 	register char *cp = m_rtmsg.m_space;
489 	struct sockaddr_dl *sdl;
490 	struct addrinfo hints, *res;
491 	int gai_error;
492 
493 	getsocket();
494 	sin_m = blank_sin;
495 
496 	bzero(&hints, sizeof(hints));
497 	hints.ai_family = AF_INET6;
498 	gai_error = getaddrinfo(host, NULL, &hints, &res);
499 	if (gai_error) {
500 		fprintf(stderr, "ndp: %s: %s\n", host,
501 		    gai_strerror(gai_error));
502 		return 1;
503 	}
504 	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
505 	sin->sin6_scope_id =
506 	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
507 	if (rtmsg(RTM_GET) < 0) {
508 		errx(1, "RTM_GET(%s) failed", host);
509 		/* NOTREACHED */
510 	}
511 	sin = (struct sockaddr_in6 *)(rtm + 1);
512 	sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
513 	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
514 		if (sdl->sdl_family == AF_LINK &&
515 		    !(rtm->rtm_flags & RTF_GATEWAY)) {
516 			goto delete;
517 		}
518 		fprintf(stderr, "delete: cannot delete non-NDP entry\n");
519 		return 1;
520 	}
521 
522 delete:
523 	if (sdl->sdl_family != AF_LINK) {
524 		printf("cannot locate %s\n", host);
525 		return (1);
526 	}
527         /*
528          * need to reinit the field because it has rt_key
529          * but we want the actual address
530          */
531 	NEXTADDR(RTA_DST, sin_m);
532 	rtm->rtm_flags |= RTF_LLDATA;
533 	if (rtmsg(RTM_DELETE) == 0) {
534 		getnameinfo((struct sockaddr *)sin,
535 		    sin->sin6_len, host_buf,
536 		    sizeof(host_buf), NULL, 0,
537 		    (nflag ? NI_NUMERICHOST : 0));
538 		printf("%s (%s) deleted\n", host, host_buf);
539 	}
540 
541 	return 0;
542 }
543 
544 #define W_ADDR	36
545 #define W_LL	17
546 #define W_IF	6
547 
548 /*
549  * Dump the entire neighbor cache
550  */
551 void
552 dump(struct sockaddr_in6 *addr, int cflag)
553 {
554 	int mib[6];
555 	size_t needed;
556 	char *lim, *buf, *next;
557 	struct rt_msghdr *rtm;
558 	struct sockaddr_in6 *sin;
559 	struct sockaddr_dl *sdl;
560 	extern int h_errno;
561 	struct in6_nbrinfo *nbi;
562 	struct timeval now;
563 	int addrwidth;
564 	int llwidth;
565 	int ifwidth;
566 	char flgbuf[8];
567 	char *ifname;
568 
569 	/* Print header */
570 	if (!tflag && !cflag)
571 		printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
572 		    W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
573 		    W_IF, W_IF, "Netif", "Expire", "S", "Flags");
574 
575 again:;
576 	mib[0] = CTL_NET;
577 	mib[1] = PF_ROUTE;
578 	mib[2] = 0;
579 	mib[3] = AF_INET6;
580 	mib[4] = NET_RT_FLAGS;
581 #ifdef RTF_LLINFO
582 	mib[5] = RTF_LLINFO;
583 #else
584 	mib[5] = 0;
585 #endif
586 	if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
587 		err(1, "sysctl(PF_ROUTE estimate)");
588 	if (needed > 0) {
589 		if ((buf = malloc(needed)) == NULL)
590 			err(1, "malloc");
591 		if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
592 			err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
593 		lim = buf + needed;
594 	} else
595 		buf = lim = NULL;
596 
597 	for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
598 		int isrouter = 0, prbs = 0;
599 
600 		rtm = (struct rt_msghdr *)next;
601 		sin = (struct sockaddr_in6 *)(rtm + 1);
602 		sdl = (struct sockaddr_dl *)((char *)sin + ALIGN(sin->sin6_len));
603 
604 		/*
605 		 * Some OSes can produce a route that has the LINK flag but
606 		 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
607 		 * and BSD/OS, where xx is not the interface identifier on
608 		 * lo0).  Such routes entry would annoy getnbrinfo() below,
609 		 * so we skip them.
610 		 * XXX: such routes should have the GATEWAY flag, not the
611 		 * LINK flag.  However, there is rotten routing software
612 		 * that advertises all routes that have the GATEWAY flag.
613 		 * Thus, KAME kernel intentionally does not set the LINK flag.
614 		 * What is to be fixed is not ndp, but such routing software
615 		 * (and the kernel workaround)...
616 		 */
617 		if (sdl->sdl_family != AF_LINK)
618 			continue;
619 
620 		if (!(rtm->rtm_flags & RTF_HOST))
621 			continue;
622 
623 		if (addr) {
624 			if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr,
625 			    &sin->sin6_addr) == 0 ||
626 			    addr->sin6_scope_id != sin->sin6_scope_id)
627 				continue;
628 			found_entry = 1;
629 		} else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
630 			continue;
631 		if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
632 		    IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
633 			/* XXX: should scope id be filled in the kernel? */
634 			if (sin->sin6_scope_id == 0)
635 				sin->sin6_scope_id = sdl->sdl_index;
636 		}
637 		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
638 		    sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
639 		if (cflag) {
640 #ifdef RTF_WASCLONED
641 			if (rtm->rtm_flags & RTF_WASCLONED)
642 				delete(host_buf);
643 #elif defined(RTF_CLONED)
644 			if (rtm->rtm_flags & RTF_CLONED)
645 				delete(host_buf);
646 #else
647 			delete(host_buf);
648 #endif
649 			continue;
650 		}
651 		gettimeofday(&now, 0);
652 		if (tflag)
653 			ts_print(&now);
654 
655 		addrwidth = strlen(host_buf);
656 		if (addrwidth < W_ADDR)
657 			addrwidth = W_ADDR;
658 		llwidth = strlen(ether_str(sdl));
659 		if (W_ADDR + W_LL - addrwidth > llwidth)
660 			llwidth = W_ADDR + W_LL - addrwidth;
661 		ifname = if_indextoname(sdl->sdl_index, ifix_buf);
662 		if (!ifname)
663 			ifname = "?";
664 		ifwidth = strlen(ifname);
665 		if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
666 			ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
667 
668 		printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
669 		    llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
670 
671 		/* Print neighbor discovery specific informations */
672 		nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
673 		if (nbi) {
674 			if (nbi->expire > now.tv_sec) {
675 				printf(" %-9.9s",
676 				    sec2str(nbi->expire - now.tv_sec));
677 			} else if (nbi->expire == 0)
678 				printf(" %-9.9s", "permanent");
679 			else
680 				printf(" %-9.9s", "expired");
681 
682 			switch (nbi->state) {
683 			case ND6_LLINFO_NOSTATE:
684 				 printf(" N");
685 				 break;
686 #ifdef ND6_LLINFO_WAITDELETE
687 			case ND6_LLINFO_WAITDELETE:
688 				 printf(" W");
689 				 break;
690 #endif
691 			case ND6_LLINFO_INCOMPLETE:
692 				 printf(" I");
693 				 break;
694 			case ND6_LLINFO_REACHABLE:
695 				 printf(" R");
696 				 break;
697 			case ND6_LLINFO_STALE:
698 				 printf(" S");
699 				 break;
700 			case ND6_LLINFO_DELAY:
701 				 printf(" D");
702 				 break;
703 			case ND6_LLINFO_PROBE:
704 				 printf(" P");
705 				 break;
706 			default:
707 				 printf(" ?");
708 				 break;
709 			}
710 
711 			isrouter = nbi->isrouter;
712 			prbs = nbi->asked;
713 		} else {
714 			warnx("failed to get neighbor information");
715 			printf("  ");
716 		}
717 
718 		/*
719 		 * other flags. R: router, P: proxy, W: ??
720 		 */
721 		if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
722 			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
723 			    isrouter ? "R" : "",
724 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
725 		} else {
726 			sin = (struct sockaddr_in6 *)
727 			    (sdl->sdl_len + (char *)sdl);
728 #if 0	/* W and P are mystery even for us */
729 			snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
730 			    isrouter ? "R" : "",
731 			    !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
732 			    (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
733 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
734 #else
735 			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
736 			    isrouter ? "R" : "",
737 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
738 #endif
739 		}
740 		printf(" %s", flgbuf);
741 
742 		if (prbs)
743 			printf(" %d", prbs);
744 
745 		printf("\n");
746 	}
747 	if (buf != NULL)
748 		free(buf);
749 
750 	if (repeat) {
751 		printf("\n");
752 		fflush(stdout);
753 		sleep(repeat);
754 		goto again;
755 	}
756 }
757 
758 static struct in6_nbrinfo *
759 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
760 {
761 	static struct in6_nbrinfo nbi;
762 	int s;
763 
764 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
765 		err(1, "socket");
766 
767 	bzero(&nbi, sizeof(nbi));
768 	if_indextoname(ifindex, nbi.ifname);
769 	nbi.addr = *addr;
770 	if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
771 		if (warning)
772 			warn("ioctl(SIOCGNBRINFO_IN6)");
773 		close(s);
774 		return(NULL);
775 	}
776 
777 	close(s);
778 	return(&nbi);
779 }
780 
781 static char *
782 ether_str(struct sockaddr_dl *sdl)
783 {
784 	static char hbuf[NI_MAXHOST];
785 	char *cp;
786 
787 	if (sdl->sdl_alen == ETHER_ADDR_LEN) {
788 		strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
789 		    sizeof(hbuf));
790 	} else if (sdl->sdl_alen) {
791 		int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
792 		snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
793 	} else
794 		snprintf(hbuf, sizeof(hbuf), "(incomplete)");
795 
796 	return(hbuf);
797 }
798 
799 int
800 ndp_ether_aton(char *a, u_char *n)
801 {
802 	int i, o[6];
803 
804 	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
805 	    &o[3], &o[4], &o[5]);
806 	if (i != 6) {
807 		fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
808 		return (1);
809 	}
810 	for (i = 0; i < 6; i++)
811 		n[i] = o[i];
812 	return (0);
813 }
814 
815 void
816 usage()
817 {
818 	printf("usage: ndp [-nt] hostname\n");
819 	printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
820 	printf("       ndp [-nt] -A wait\n");
821 	printf("       ndp [-nt] -d hostname\n");
822 	printf("       ndp [-nt] -f filename\n");
823 	printf("       ndp [-nt] -i interface [flags...]\n");
824 #ifdef SIOCSDEFIFACE_IN6
825 	printf("       ndp [-nt] -I [interface|delete]\n");
826 #endif
827 	printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
828 	exit(1);
829 }
830 
831 int
832 rtmsg(int cmd)
833 {
834 	static int seq;
835 	int rlen;
836 	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
837 	register char *cp = m_rtmsg.m_space;
838 	register int l;
839 
840 	errno = 0;
841 	if (cmd == RTM_DELETE)
842 		goto doit;
843 	bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
844 	rtm->rtm_flags = flags;
845 	rtm->rtm_version = RTM_VERSION;
846 
847 	switch (cmd) {
848 	default:
849 		fprintf(stderr, "ndp: internal wrong cmd\n");
850 		exit(1);
851 	case RTM_ADD:
852 		rtm->rtm_addrs |= RTA_GATEWAY;
853 		if (expire_time) {
854 			rtm->rtm_rmx.rmx_expire = expire_time;
855 			rtm->rtm_inits = RTV_EXPIRE;
856 		}
857 		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
858 #if 0 /* we don't support ipv6addr/128 type proxying */
859 		if (rtm->rtm_flags & RTF_ANNOUNCE) {
860 			rtm->rtm_flags &= ~RTF_HOST;
861 			rtm->rtm_addrs |= RTA_NETMASK;
862 		}
863 #endif
864 		/* FALLTHROUGH */
865 	case RTM_GET:
866 		rtm->rtm_addrs |= RTA_DST;
867 	}
868 
869 	NEXTADDR(RTA_DST, sin_m);
870 	NEXTADDR(RTA_GATEWAY, sdl_m);
871 #if 0 /* we don't support ipv6addr/128 type proxying */
872 	memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
873 	NEXTADDR(RTA_NETMASK, so_mask);
874 #endif
875 
876 	rtm->rtm_msglen = cp - (char *)&m_rtmsg;
877 doit:
878 	l = rtm->rtm_msglen;
879 	rtm->rtm_seq = ++seq;
880 	rtm->rtm_type = cmd;
881 	if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
882 		if (errno != ESRCH || cmd != RTM_DELETE) {
883 			err(1, "writing to routing socket");
884 			/* NOTREACHED */
885 		}
886 	}
887 	do {
888 		l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
889 	} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
890 	if (l < 0)
891 		(void) fprintf(stderr, "ndp: read from routing socket: %s\n",
892 		    strerror(errno));
893 	return (0);
894 }
895 
896 void
897 ifinfo(char *ifname, int argc, char **argv)
898 {
899 	struct in6_ndireq nd;
900 	int i, s;
901 	u_int32_t newflags;
902 #ifdef IPV6CTL_USETEMPADDR
903 	u_int8_t nullbuf[8];
904 #endif
905 
906 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
907 		err(1, "socket");
908 		/* NOTREACHED */
909 	}
910 	bzero(&nd, sizeof(nd));
911 	strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
912 	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
913 		err(1, "ioctl(SIOCGIFINFO_IN6)");
914 		/* NOTREACHED */
915 	}
916 #define ND nd.ndi
917 	newflags = ND.flags;
918 	for (i = 0; i < argc; i++) {
919 		int clear = 0;
920 		char *cp = argv[i];
921 
922 		if (*cp == '-') {
923 			clear = 1;
924 			cp++;
925 		}
926 
927 #define SETFLAG(s, f) \
928 	do {\
929 		if (strcmp(cp, (s)) == 0) {\
930 			if (clear)\
931 				newflags &= ~(f);\
932 			else\
933 				newflags |= (f);\
934 		}\
935 	} while (0)
936 /*
937  * XXX: this macro is not 100% correct, in that it matches "nud" against
938  *      "nudbogus".  But we just let it go since this is minor.
939  */
940 #define SETVALUE(f, v) \
941 	do { \
942 		char *valptr; \
943 		unsigned long newval; \
944 		v = 0; /* unspecified */ \
945 		if (strncmp(cp, f, strlen(f)) == 0) { \
946 			valptr = strchr(cp, '='); \
947 			if (valptr == NULL) \
948 				err(1, "syntax error in %s field", (f)); \
949 			errno = 0; \
950 			newval = strtoul(++valptr, NULL, 0); \
951 			if (errno) \
952 				err(1, "syntax error in %s's value", (f)); \
953 			v = newval; \
954 		} \
955 	} while (0)
956 
957 		SETFLAG("disabled", ND6_IFF_IFDISABLED);
958 		SETFLAG("nud", ND6_IFF_PERFORMNUD);
959 #ifdef ND6_IFF_ACCEPT_RTADV
960 		SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
961 #endif
962 #ifdef ND6_IFF_AUTO_LINKLOCAL
963 		SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
964 #endif
965 #ifdef ND6_IFF_NO_PREFER_IFACE
966 		SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
967 #endif
968 		SETVALUE("basereachable", ND.basereachable);
969 		SETVALUE("retrans", ND.retrans);
970 		SETVALUE("curhlim", ND.chlim);
971 
972 		ND.flags = newflags;
973 		if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
974 			err(1, "ioctl(SIOCSIFINFO_IN6)");
975 			/* NOTREACHED */
976 		}
977 #undef SETFLAG
978 #undef SETVALUE
979 	}
980 
981 	if (!ND.initialized) {
982 		errx(1, "%s: not initialized yet", ifname);
983 		/* NOTREACHED */
984 	}
985 
986 	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
987 		err(1, "ioctl(SIOCGIFINFO_IN6)");
988 		/* NOTREACHED */
989 	}
990 	printf("linkmtu=%d", ND.linkmtu);
991 	printf(", maxmtu=%d", ND.maxmtu);
992 	printf(", curhlim=%d", ND.chlim);
993 	printf(", basereachable=%ds%dms",
994 	    ND.basereachable / 1000, ND.basereachable % 1000);
995 	printf(", reachable=%ds", ND.reachable);
996 	printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
997 #ifdef IPV6CTL_USETEMPADDR
998 	memset(nullbuf, 0, sizeof(nullbuf));
999 	if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1000 		int j;
1001 		u_int8_t *rbuf;
1002 
1003 		for (i = 0; i < 3; i++) {
1004 			switch (i) {
1005 			case 0:
1006 				printf("\nRandom seed(0): ");
1007 				rbuf = ND.randomseed0;
1008 				break;
1009 			case 1:
1010 				printf("\nRandom seed(1): ");
1011 				rbuf = ND.randomseed1;
1012 				break;
1013 			case 2:
1014 				printf("\nRandom ID:      ");
1015 				rbuf = ND.randomid;
1016 				break;
1017 			default:
1018 				errx(1, "impossible case for tempaddr display");
1019 			}
1020 			for (j = 0; j < 8; j++)
1021 				printf("%02x", rbuf[j]);
1022 		}
1023 	}
1024 #endif
1025 	if (ND.flags) {
1026 		printf("\nFlags: ");
1027 #ifdef ND6_IFF_IFDISABLED
1028 		if ((ND.flags & ND6_IFF_IFDISABLED))
1029 			printf("disabled ");
1030 #endif
1031 		if ((ND.flags & ND6_IFF_PERFORMNUD))
1032 			printf("nud ");
1033 #ifdef ND6_IFF_ACCEPT_RTADV
1034 		if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1035 			printf("accept_rtadv ");
1036 #endif
1037 #ifdef ND6_IFF_AUTO_LINKLOCAL
1038 		if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1039 			printf("auto_linklocal ");
1040 #endif
1041 #ifdef ND6_IFF_NO_PREFER_IFACE
1042 		if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1043 			printf("no_prefer_iface ");
1044 #endif
1045 	}
1046 	putc('\n', stdout);
1047 #undef ND
1048 
1049 	close(s);
1050 }
1051 
1052 #ifndef ND_RA_FLAG_RTPREF_MASK	/* XXX: just for compilation on *BSD release */
1053 #define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
1054 #endif
1055 
1056 void
1057 rtrlist()
1058 {
1059 #ifdef ICMPV6CTL_ND6_DRLIST
1060 	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1061 	char *buf;
1062 	struct in6_defrouter *p, *ep;
1063 	size_t l;
1064 	struct timeval now;
1065 
1066 	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1067 		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1068 		/*NOTREACHED*/
1069 	}
1070 	if (l == 0)
1071 		return;
1072 	buf = malloc(l);
1073 	if (!buf) {
1074 		err(1, "malloc");
1075 		/*NOTREACHED*/
1076 	}
1077 	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1078 		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1079 		/*NOTREACHED*/
1080 	}
1081 
1082 	ep = (struct in6_defrouter *)(buf + l);
1083 	for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1084 		int rtpref;
1085 
1086 		if (getnameinfo((struct sockaddr *)&p->rtaddr,
1087 		    p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1088 		    (nflag ? NI_NUMERICHOST : 0)) != 0)
1089 			strlcpy(host_buf, "?", sizeof(host_buf));
1090 
1091 		printf("%s if=%s", host_buf,
1092 		    if_indextoname(p->if_index, ifix_buf));
1093 		printf(", flags=%s%s",
1094 		    p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1095 		    p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1096 		rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1097 		printf(", pref=%s", rtpref_str[rtpref]);
1098 
1099 		gettimeofday(&now, 0);
1100 		if (p->expire == 0)
1101 			printf(", expire=Never\n");
1102 		else
1103 			printf(", expire=%s\n",
1104 			    sec2str(p->expire - now.tv_sec));
1105 	}
1106 	free(buf);
1107 #else
1108 	struct in6_drlist dr;
1109 	int s, i;
1110 	struct timeval now;
1111 
1112 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1113 		err(1, "socket");
1114 		/* NOTREACHED */
1115 	}
1116 	bzero(&dr, sizeof(dr));
1117 	strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1118 	if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1119 		err(1, "ioctl(SIOCGDRLST_IN6)");
1120 		/* NOTREACHED */
1121 	}
1122 #define DR dr.defrouter[i]
1123 	for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1124 		struct sockaddr_in6 sin6;
1125 
1126 		bzero(&sin6, sizeof(sin6));
1127 		sin6.sin6_family = AF_INET6;
1128 		sin6.sin6_len = sizeof(sin6);
1129 		sin6.sin6_addr = DR.rtaddr;
1130 		getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1131 		    sizeof(host_buf), NULL, 0,
1132 		    (nflag ? NI_NUMERICHOST : 0));
1133 
1134 		printf("%s if=%s", host_buf,
1135 		    if_indextoname(DR.if_index, ifix_buf));
1136 		printf(", flags=%s%s",
1137 		    DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1138 		    DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1139 		gettimeofday(&now, 0);
1140 		if (DR.expire == 0)
1141 			printf(", expire=Never\n");
1142 		else
1143 			printf(", expire=%s\n",
1144 			    sec2str(DR.expire - now.tv_sec));
1145 	}
1146 #undef DR
1147 	close(s);
1148 #endif
1149 }
1150 
1151 void
1152 plist()
1153 {
1154 #ifdef ICMPV6CTL_ND6_PRLIST
1155 	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1156 	char *buf;
1157 	struct in6_prefix *p, *ep, *n;
1158 	struct sockaddr_in6 *advrtr;
1159 	size_t l;
1160 	struct timeval now;
1161 	const int niflags = NI_NUMERICHOST;
1162 	int ninflags = nflag ? NI_NUMERICHOST : 0;
1163 	char namebuf[NI_MAXHOST];
1164 
1165 	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1166 		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1167 		/*NOTREACHED*/
1168 	}
1169 	buf = malloc(l);
1170 	if (!buf) {
1171 		err(1, "malloc");
1172 		/*NOTREACHED*/
1173 	}
1174 	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1175 		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1176 		/*NOTREACHED*/
1177 	}
1178 
1179 	ep = (struct in6_prefix *)(buf + l);
1180 	for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1181 		advrtr = (struct sockaddr_in6 *)(p + 1);
1182 		n = (struct in6_prefix *)&advrtr[p->advrtrs];
1183 
1184 		if (getnameinfo((struct sockaddr *)&p->prefix,
1185 		    p->prefix.sin6_len, namebuf, sizeof(namebuf),
1186 		    NULL, 0, niflags) != 0)
1187 			strlcpy(namebuf, "?", sizeof(namebuf));
1188 		printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1189 		    if_indextoname(p->if_index, ifix_buf));
1190 
1191 		gettimeofday(&now, 0);
1192 		/*
1193 		 * meaning of fields, especially flags, is very different
1194 		 * by origin.  notify the difference to the users.
1195 		 */
1196 		printf("flags=%s%s%s%s%s",
1197 		    p->raflags.onlink ? "L" : "",
1198 		    p->raflags.autonomous ? "A" : "",
1199 		    (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1200 		    (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1201 #ifdef NDPRF_HOME
1202 		    (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1203 #else
1204 		    ""
1205 #endif
1206 		    );
1207 		if (p->vltime == ND6_INFINITE_LIFETIME)
1208 			printf(" vltime=infinity");
1209 		else
1210 			printf(" vltime=%lu", (unsigned long)p->vltime);
1211 		if (p->pltime == ND6_INFINITE_LIFETIME)
1212 			printf(", pltime=infinity");
1213 		else
1214 			printf(", pltime=%lu", (unsigned long)p->pltime);
1215 		if (p->expire == 0)
1216 			printf(", expire=Never");
1217 		else if (p->expire >= now.tv_sec)
1218 			printf(", expire=%s",
1219 			    sec2str(p->expire - now.tv_sec));
1220 		else
1221 			printf(", expired");
1222 		printf(", ref=%d", p->refcnt);
1223 		printf("\n");
1224 		/*
1225 		 * "advertising router" list is meaningful only if the prefix
1226 		 * information is from RA.
1227 		 */
1228 		if (p->advrtrs) {
1229 			int j;
1230 			struct sockaddr_in6 *sin6;
1231 
1232 			sin6 = advrtr;
1233 			printf("  advertised by\n");
1234 			for (j = 0; j < p->advrtrs; j++) {
1235 				struct in6_nbrinfo *nbi;
1236 
1237 				if (getnameinfo((struct sockaddr *)sin6,
1238 				    sin6->sin6_len, namebuf, sizeof(namebuf),
1239 				    NULL, 0, ninflags) != 0)
1240 					strlcpy(namebuf, "?", sizeof(namebuf));
1241 				printf("    %s", namebuf);
1242 
1243 				nbi = getnbrinfo(&sin6->sin6_addr,
1244 				    p->if_index, 0);
1245 				if (nbi) {
1246 					switch (nbi->state) {
1247 					case ND6_LLINFO_REACHABLE:
1248 					case ND6_LLINFO_STALE:
1249 					case ND6_LLINFO_DELAY:
1250 					case ND6_LLINFO_PROBE:
1251 						printf(" (reachable)\n");
1252 						break;
1253 					default:
1254 						printf(" (unreachable)\n");
1255 					}
1256 				} else
1257 					printf(" (no neighbor state)\n");
1258 				sin6++;
1259 			}
1260 		} else
1261 			printf("  No advertising router\n");
1262 	}
1263 	free(buf);
1264 #else
1265 	struct in6_prlist pr;
1266 	int s, i;
1267 	struct timeval now;
1268 
1269 	gettimeofday(&now, 0);
1270 
1271 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1272 		err(1, "socket");
1273 		/* NOTREACHED */
1274 	}
1275 	bzero(&pr, sizeof(pr));
1276 	strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1277 	if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1278 		err(1, "ioctl(SIOCGPRLST_IN6)");
1279 		/* NOTREACHED */
1280 	}
1281 #define PR pr.prefix[i]
1282 	for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1283 		struct sockaddr_in6 p6;
1284 		char namebuf[NI_MAXHOST];
1285 		int niflags;
1286 
1287 #ifdef NDPRF_ONLINK
1288 		p6 = PR.prefix;
1289 #else
1290 		memset(&p6, 0, sizeof(p6));
1291 		p6.sin6_family = AF_INET6;
1292 		p6.sin6_len = sizeof(p6);
1293 		p6.sin6_addr = PR.prefix;
1294 #endif
1295 		niflags = NI_NUMERICHOST;
1296 		if (getnameinfo((struct sockaddr *)&p6,
1297 		    sizeof(p6), namebuf, sizeof(namebuf),
1298 		    NULL, 0, niflags)) {
1299 			warnx("getnameinfo failed");
1300 			continue;
1301 		}
1302 		printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1303 		    if_indextoname(PR.if_index, ifix_buf));
1304 
1305 		gettimeofday(&now, 0);
1306 		/*
1307 		 * meaning of fields, especially flags, is very different
1308 		 * by origin.  notify the difference to the users.
1309 		 */
1310 #if 0
1311 		printf("  %s",
1312 		    PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1313 #endif
1314 #ifdef NDPRF_ONLINK
1315 		printf("flags=%s%s%s%s%s",
1316 		    PR.raflags.onlink ? "L" : "",
1317 		    PR.raflags.autonomous ? "A" : "",
1318 		    (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1319 		    (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1320 #ifdef NDPRF_HOME
1321 		    (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1322 #else
1323 		    ""
1324 #endif
1325 		    );
1326 #else
1327 		printf("flags=%s%s",
1328 		    PR.raflags.onlink ? "L" : "",
1329 		    PR.raflags.autonomous ? "A" : "");
1330 #endif
1331 		if (PR.vltime == ND6_INFINITE_LIFETIME)
1332 			printf(" vltime=infinity");
1333 		else
1334 			printf(" vltime=%lu", PR.vltime);
1335 		if (PR.pltime == ND6_INFINITE_LIFETIME)
1336 			printf(", pltime=infinity");
1337 		else
1338 			printf(", pltime=%lu", PR.pltime);
1339 		if (PR.expire == 0)
1340 			printf(", expire=Never");
1341 		else if (PR.expire >= now.tv_sec)
1342 			printf(", expire=%s",
1343 			    sec2str(PR.expire - now.tv_sec));
1344 		else
1345 			printf(", expired");
1346 #ifdef NDPRF_ONLINK
1347 		printf(", ref=%d", PR.refcnt);
1348 #endif
1349 #if 0
1350 		switch (PR.origin) {
1351 		case PR_ORIG_RA:
1352 			printf(", origin=RA");
1353 			break;
1354 		case PR_ORIG_RR:
1355 			printf(", origin=RR");
1356 			break;
1357 		case PR_ORIG_STATIC:
1358 			printf(", origin=static");
1359 			break;
1360 		case PR_ORIG_KERNEL:
1361 			printf(", origin=kernel");
1362 			break;
1363 		default:
1364 			printf(", origin=?");
1365 			break;
1366 		}
1367 #endif
1368 		printf("\n");
1369 		/*
1370 		 * "advertising router" list is meaningful only if the prefix
1371 		 * information is from RA.
1372 		 */
1373 		if (0 &&	/* prefix origin is almost obsolted */
1374 		    PR.origin != PR_ORIG_RA)
1375 			;
1376 		else if (PR.advrtrs) {
1377 			int j;
1378 			printf("  advertised by\n");
1379 			for (j = 0; j < PR.advrtrs; j++) {
1380 				struct sockaddr_in6 sin6;
1381 				struct in6_nbrinfo *nbi;
1382 
1383 				bzero(&sin6, sizeof(sin6));
1384 				sin6.sin6_family = AF_INET6;
1385 				sin6.sin6_len = sizeof(sin6);
1386 				sin6.sin6_addr = PR.advrtr[j];
1387 				sin6.sin6_scope_id = PR.if_index; /* XXX */
1388 				getnameinfo((struct sockaddr *)&sin6,
1389 				    sin6.sin6_len, host_buf,
1390 				    sizeof(host_buf), NULL, 0,
1391 				    (nflag ? NI_NUMERICHOST : 0));
1392 				printf("    %s", host_buf);
1393 
1394 				nbi = getnbrinfo(&sin6.sin6_addr,
1395 				    PR.if_index, 0);
1396 				if (nbi) {
1397 					switch (nbi->state) {
1398 					case ND6_LLINFO_REACHABLE:
1399 					case ND6_LLINFO_STALE:
1400 					case ND6_LLINFO_DELAY:
1401 					case ND6_LLINFO_PROBE:
1402 						 printf(" (reachable)\n");
1403 						 break;
1404 					default:
1405 						 printf(" (unreachable)\n");
1406 					}
1407 				} else
1408 					printf(" (no neighbor state)\n");
1409 			}
1410 			if (PR.advrtrs > DRLSTSIZ)
1411 				printf("    and %d routers\n",
1412 				    PR.advrtrs - DRLSTSIZ);
1413 		} else
1414 			printf("  No advertising router\n");
1415 	}
1416 #undef PR
1417 	close(s);
1418 #endif
1419 }
1420 
1421 void
1422 pfx_flush()
1423 {
1424 	char dummyif[IFNAMSIZ+8];
1425 	int s;
1426 
1427 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1428 		err(1, "socket");
1429 	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1430 	if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1431 		err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1432 }
1433 
1434 void
1435 rtr_flush()
1436 {
1437 	char dummyif[IFNAMSIZ+8];
1438 	int s;
1439 
1440 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1441 		err(1, "socket");
1442 	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1443 	if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1444 		err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1445 
1446 	close(s);
1447 }
1448 
1449 void
1450 harmonize_rtr()
1451 {
1452 	char dummyif[IFNAMSIZ+8];
1453 	int s;
1454 
1455 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1456 		err(1, "socket");
1457 	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1458 	if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1459 		err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1460 
1461 	close(s);
1462 }
1463 
1464 #ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
1465 static void
1466 setdefif(char *ifname)
1467 {
1468 	struct in6_ndifreq ndifreq;
1469 	unsigned int ifindex;
1470 
1471 	if (strcasecmp(ifname, "delete") == 0)
1472 		ifindex = 0;
1473 	else {
1474 		if ((ifindex = if_nametoindex(ifname)) == 0)
1475 			err(1, "failed to resolve i/f index for %s", ifname);
1476 	}
1477 
1478 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1479 		err(1, "socket");
1480 
1481 	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1482 	ndifreq.ifindex = ifindex;
1483 
1484 	if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1485 		err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1486 
1487 	close(s);
1488 }
1489 
1490 static void
1491 getdefif()
1492 {
1493 	struct in6_ndifreq ndifreq;
1494 	char ifname[IFNAMSIZ+8];
1495 
1496 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1497 		err(1, "socket");
1498 
1499 	memset(&ndifreq, 0, sizeof(ndifreq));
1500 	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1501 
1502 	if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1503 		err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1504 
1505 	if (ndifreq.ifindex == 0)
1506 		printf("No default interface.\n");
1507 	else {
1508 		if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1509 			err(1, "failed to resolve ifname for index %lu",
1510 			    ndifreq.ifindex);
1511 		printf("ND default interface = %s\n", ifname);
1512 	}
1513 
1514 	close(s);
1515 }
1516 #endif
1517 
1518 static char *
1519 sec2str(time_t total)
1520 {
1521 	static char result[256];
1522 	int days, hours, mins, secs;
1523 	int first = 1;
1524 	char *p = result;
1525 	char *ep = &result[sizeof(result)];
1526 	int n;
1527 
1528 	days = total / 3600 / 24;
1529 	hours = (total / 3600) % 24;
1530 	mins = (total / 60) % 60;
1531 	secs = total % 60;
1532 
1533 	if (days) {
1534 		first = 0;
1535 		n = snprintf(p, ep - p, "%dd", days);
1536 		if (n < 0 || n >= ep - p)
1537 			return "?";
1538 		p += n;
1539 	}
1540 	if (!first || hours) {
1541 		first = 0;
1542 		n = snprintf(p, ep - p, "%dh", hours);
1543 		if (n < 0 || n >= ep - p)
1544 			return "?";
1545 		p += n;
1546 	}
1547 	if (!first || mins) {
1548 		first = 0;
1549 		n = snprintf(p, ep - p, "%dm", mins);
1550 		if (n < 0 || n >= ep - p)
1551 			return "?";
1552 		p += n;
1553 	}
1554 	snprintf(p, ep - p, "%ds", secs);
1555 
1556 	return(result);
1557 }
1558 
1559 /*
1560  * Print the timestamp
1561  * from tcpdump/util.c
1562  */
1563 static void
1564 ts_print(const struct timeval *tvp)
1565 {
1566 	int s;
1567 
1568 	/* Default */
1569 	s = (tvp->tv_sec + thiszone) % 86400;
1570 	(void)printf("%02d:%02d:%02d.%06u ",
1571 	    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1572 }
1573 
1574 #undef NEXTADDR
1575