xref: /freebsd/usr.sbin/ndp/ndp.c (revision 5dd76dd0cc19450133aa379ce0ce4a68ae07fb39)
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_var.h>
87 #include <net/if_dl.h>
88 #include <net/if_types.h>
89 #include <net/route.h>
90 
91 #include <netinet/in.h>
92 #include <netinet/if_ether.h>
93 
94 #include <netinet/icmp6.h>
95 #include <netinet6/in6_var.h>
96 #include <netinet6/nd6.h>
97 
98 #include <arpa/inet.h>
99 
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 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 'd':
191 		case 'f':
192 		case 'i' :
193 			if (mode) {
194 				usage();
195 				/*NOTREACHED*/
196 			}
197 			mode = ch;
198 			arg = optarg;
199 			break;
200 		case 'n':
201 			nflag = 1;
202 			break;
203 		case 't':
204 			tflag = 1;
205 			break;
206 		case 'A':
207 			if (mode) {
208 				usage();
209 				/*NOTREACHED*/
210 			}
211 			mode = 'a';
212 			repeat = atoi(optarg);
213 			if (repeat < 0) {
214 				usage();
215 				/*NOTREACHED*/
216 			}
217 			break;
218 		default:
219 			usage();
220 		}
221 
222 	argc -= optind;
223 	argv += optind;
224 
225 	switch (mode) {
226 	case 'a':
227 	case 'c':
228 		if (argc != 0) {
229 			usage();
230 			/*NOTREACHED*/
231 		}
232 		dump(0, mode == 'c');
233 		break;
234 	case 'd':
235 		if (argc != 0) {
236 			usage();
237 			/*NOTREACHED*/
238 		}
239 		delete(arg);
240 		break;
241 	case 'I':
242 #ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
243 		if (argc > 1) {
244 			usage();
245 			/*NOTREACHED*/
246 		} else if (argc == 1) {
247 			if (strcmp(*argv, "delete") == 0 ||
248 			    if_nametoindex(*argv))
249 				setdefif(*argv);
250 			else
251 				errx(1, "invalid interface %s", *argv);
252 		}
253 		getdefif(); /* always call it to print the result */
254 		break;
255 #else
256 		errx(1, "not supported yet");
257 		/*NOTREACHED*/
258 #endif
259 	case 'p':
260 		if (argc != 0) {
261 			usage();
262 			/*NOTREACHED*/
263 		}
264 		plist();
265 		break;
266 	case 'i':
267 		ifinfo(arg, argc, argv);
268 		break;
269 	case 'r':
270 		if (argc != 0) {
271 			usage();
272 			/*NOTREACHED*/
273 		}
274 		rtrlist();
275 		break;
276 	case 's':
277 		if (argc < 2 || argc > 4)
278 			usage();
279 		exit(set(argc, argv) ? 1 : 0);
280 	case 'H':
281 		if (argc != 0) {
282 			usage();
283 			/*NOTREACHED*/
284 		}
285 		harmonize_rtr();
286 		break;
287 	case 'P':
288 		if (argc != 0) {
289 			usage();
290 			/*NOTREACHED*/
291 		}
292 		pfx_flush();
293 		break;
294 	case 'R':
295 		if (argc != 0) {
296 			usage();
297 			/*NOTREACHED*/
298 		}
299 		rtr_flush();
300 		break;
301 	case 0:
302 		if (argc != 1) {
303 			usage();
304 			/*NOTREACHED*/
305 		}
306 		get(argv[0]);
307 		break;
308 	}
309 	exit(0);
310 }
311 
312 /*
313  * Process a file to set standard ndp entries
314  */
315 int
316 file(char *name)
317 {
318 	FILE *fp;
319 	int i, retval;
320 	char line[100], arg[5][50], *args[5];
321 
322 	if ((fp = fopen(name, "r")) == NULL) {
323 		fprintf(stderr, "ndp: cannot open %s\n", name);
324 		exit(1);
325 	}
326 	args[0] = &arg[0][0];
327 	args[1] = &arg[1][0];
328 	args[2] = &arg[2][0];
329 	args[3] = &arg[3][0];
330 	args[4] = &arg[4][0];
331 	retval = 0;
332 	while (fgets(line, sizeof(line), fp) != NULL) {
333 		i = sscanf(line, "%49s %49s %49s %49s %49s",
334 		    arg[0], arg[1], arg[2], arg[3], arg[4]);
335 		if (i < 2) {
336 			fprintf(stderr, "ndp: bad line: %s\n", line);
337 			retval = 1;
338 			continue;
339 		}
340 		if (set(i, args))
341 			retval = 1;
342 	}
343 	fclose(fp);
344 	return (retval);
345 }
346 
347 void
348 getsocket()
349 {
350 	if (s < 0) {
351 		s = socket(PF_ROUTE, SOCK_RAW, 0);
352 		if (s < 0) {
353 			err(1, "socket");
354 			/* NOTREACHED */
355 		}
356 	}
357 }
358 
359 struct	sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
360 struct	sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
361 struct	sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
362 time_t	expire_time;
363 int	flags, found_entry;
364 struct	{
365 	struct	rt_msghdr m_rtm;
366 	char	m_space[512];
367 }	m_rtmsg;
368 
369 /*
370  * Set an individual neighbor cache entry
371  */
372 int
373 set(int argc, char **argv)
374 {
375 	register struct sockaddr_in6 *sin = &sin_m;
376 	register struct sockaddr_dl *sdl;
377 	register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
378 	struct addrinfo hints, *res;
379 	int gai_error;
380 	u_char *ea;
381 	char *host = argv[0], *eaddr = argv[1];
382 
383 	getsocket();
384 	argc -= 2;
385 	argv += 2;
386 	sdl_m = blank_sdl;
387 	sin_m = blank_sin;
388 
389 	bzero(&hints, sizeof(hints));
390 	hints.ai_family = AF_INET6;
391 	gai_error = getaddrinfo(host, NULL, &hints, &res);
392 	if (gai_error) {
393 		fprintf(stderr, "ndp: %s: %s\n", host,
394 			gai_strerror(gai_error));
395 		return 1;
396 	}
397 	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
398 	sin->sin6_scope_id =
399 	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
400 	ea = (u_char *)LLADDR(&sdl_m);
401 	if (ndp_ether_aton(eaddr, ea) == 0)
402 		sdl_m.sdl_alen = 6;
403 	flags = expire_time = 0;
404 	while (argc-- > 0) {
405 		if (strncmp(argv[0], "temp", 4) == 0) {
406 			struct timeval now;
407 
408 			gettimeofday(&now, 0);
409 			expire_time = now.tv_sec + 20 * 60;
410 		} else if (strncmp(argv[0], "proxy", 5) == 0)
411 			flags |= RTF_ANNOUNCE;
412 		argv++;
413 	}
414 	if (rtmsg(RTM_GET) < 0) {
415 		errx(1, "RTM_GET(%s) failed", host);
416 		/* NOTREACHED */
417 	}
418 	sin = (struct sockaddr_in6 *)(rtm + 1);
419 	sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
420 	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
421 		if (sdl->sdl_family == AF_LINK &&
422 		    !(rtm->rtm_flags & RTF_GATEWAY)) {
423 			switch (sdl->sdl_type) {
424 			case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
425 			case IFT_ISO88024: case IFT_ISO88025:
426 			case IFT_L2VLAN: case IFT_BRIDGE:
427 				goto overwrite;
428 			}
429 		}
430 		fprintf(stderr, "set: cannot configure a new entry\n");
431 		return 1;
432 	}
433 
434 overwrite:
435 	if (sdl->sdl_family != AF_LINK) {
436 		printf("cannot intuit interface index and type for %s\n", host);
437 		return (1);
438 	}
439 	sdl_m.sdl_type = sdl->sdl_type;
440 	sdl_m.sdl_index = sdl->sdl_index;
441 	return (rtmsg(RTM_ADD));
442 }
443 
444 /*
445  * Display an individual neighbor cache entry
446  */
447 void
448 get(char *host)
449 {
450 	struct sockaddr_in6 *sin = &sin_m;
451 	struct addrinfo hints, *res;
452 	int gai_error;
453 
454 	sin_m = blank_sin;
455 	bzero(&hints, sizeof(hints));
456 	hints.ai_family = AF_INET6;
457 	gai_error = getaddrinfo(host, NULL, &hints, &res);
458 	if (gai_error) {
459 		fprintf(stderr, "ndp: %s: %s\n", host,
460 		    gai_strerror(gai_error));
461 		return;
462 	}
463 	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
464 	sin->sin6_scope_id =
465 	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
466 	dump(sin, 0);
467 	if (found_entry == 0) {
468 		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
469 		    sizeof(host_buf), NULL ,0,
470 		    (nflag ? NI_NUMERICHOST : 0));
471 		printf("%s (%s) -- no entry\n", host, host_buf);
472 		exit(1);
473 	}
474 }
475 
476 /*
477  * Delete a neighbor cache entry
478  */
479 int
480 delete(char *host)
481 {
482 	struct sockaddr_in6 *sin = &sin_m;
483 	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
484 	register char *cp = m_rtmsg.m_space;
485 	struct sockaddr_dl *sdl;
486 	struct addrinfo hints, *res;
487 	int gai_error;
488 
489 	getsocket();
490 	sin_m = blank_sin;
491 
492 	bzero(&hints, sizeof(hints));
493 	hints.ai_family = AF_INET6;
494 	gai_error = getaddrinfo(host, NULL, &hints, &res);
495 	if (gai_error) {
496 		fprintf(stderr, "ndp: %s: %s\n", host,
497 		    gai_strerror(gai_error));
498 		return 1;
499 	}
500 	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
501 	sin->sin6_scope_id =
502 	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
503 	if (rtmsg(RTM_GET) < 0) {
504 		errx(1, "RTM_GET(%s) failed", host);
505 		/* NOTREACHED */
506 	}
507 	sin = (struct sockaddr_in6 *)(rtm + 1);
508 	sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
509 	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
510 		if (sdl->sdl_family == AF_LINK &&
511 		    !(rtm->rtm_flags & RTF_GATEWAY)) {
512 			goto delete;
513 		}
514 		fprintf(stderr, "delete: cannot delete non-NDP entry\n");
515 		return 1;
516 	}
517 
518 delete:
519 	if (sdl->sdl_family != AF_LINK) {
520 		printf("cannot locate %s\n", host);
521 		return (1);
522 	}
523         /*
524          * need to reinit the field because it has rt_key
525          * but we want the actual address
526          */
527 	NEXTADDR(RTA_DST, sin_m);
528 	rtm->rtm_flags |= RTF_LLDATA;
529 	if (rtmsg(RTM_DELETE) == 0) {
530 		getnameinfo((struct sockaddr *)sin,
531 		    sin->sin6_len, host_buf,
532 		    sizeof(host_buf), NULL, 0,
533 		    (nflag ? NI_NUMERICHOST : 0));
534 		printf("%s (%s) deleted\n", host, host_buf);
535 	}
536 
537 	return 0;
538 }
539 
540 #define W_ADDR	36
541 #define W_LL	17
542 #define W_IF	6
543 
544 /*
545  * Dump the entire neighbor cache
546  */
547 void
548 dump(struct sockaddr_in6 *addr, int cflag)
549 {
550 	int mib[6];
551 	size_t needed;
552 	char *lim, *buf, *next;
553 	struct rt_msghdr *rtm;
554 	struct sockaddr_in6 *sin;
555 	struct sockaddr_dl *sdl;
556 	extern int h_errno;
557 	struct in6_nbrinfo *nbi;
558 	struct timeval now;
559 	int addrwidth;
560 	int llwidth;
561 	int ifwidth;
562 	char flgbuf[8];
563 	char *ifname;
564 
565 	/* Print header */
566 	if (!tflag && !cflag)
567 		printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
568 		    W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
569 		    W_IF, W_IF, "Netif", "Expire", "S", "Flags");
570 
571 again:;
572 	mib[0] = CTL_NET;
573 	mib[1] = PF_ROUTE;
574 	mib[2] = 0;
575 	mib[3] = AF_INET6;
576 	mib[4] = NET_RT_FLAGS;
577 #ifdef RTF_LLINFO
578 	mib[5] = RTF_LLINFO;
579 #else
580 	mib[5] = 0;
581 #endif
582 	if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
583 		err(1, "sysctl(PF_ROUTE estimate)");
584 	if (needed > 0) {
585 		if ((buf = malloc(needed)) == NULL)
586 			err(1, "malloc");
587 		if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
588 			err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
589 		lim = buf + needed;
590 	} else
591 		buf = lim = NULL;
592 
593 	for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
594 		int isrouter = 0, prbs = 0;
595 
596 		rtm = (struct rt_msghdr *)next;
597 		sin = (struct sockaddr_in6 *)(rtm + 1);
598 		sdl = (struct sockaddr_dl *)((char *)sin + ALIGN(sin->sin6_len));
599 
600 		/*
601 		 * Some OSes can produce a route that has the LINK flag but
602 		 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
603 		 * and BSD/OS, where xx is not the interface identifier on
604 		 * lo0).  Such routes entry would annoy getnbrinfo() below,
605 		 * so we skip them.
606 		 * XXX: such routes should have the GATEWAY flag, not the
607 		 * LINK flag.  However, there is rotten routing software
608 		 * that advertises all routes that have the GATEWAY flag.
609 		 * Thus, KAME kernel intentionally does not set the LINK flag.
610 		 * What is to be fixed is not ndp, but such routing software
611 		 * (and the kernel workaround)...
612 		 */
613 		if (sdl->sdl_family != AF_LINK)
614 			continue;
615 
616 		if (!(rtm->rtm_flags & RTF_HOST))
617 			continue;
618 
619 		if (addr) {
620 			if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr,
621 			    &sin->sin6_addr) == 0 ||
622 			    addr->sin6_scope_id != sin->sin6_scope_id)
623 				continue;
624 			found_entry = 1;
625 		} else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
626 			continue;
627 		if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
628 		    IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
629 			/* XXX: should scope id be filled in the kernel? */
630 			if (sin->sin6_scope_id == 0)
631 				sin->sin6_scope_id = sdl->sdl_index;
632 		}
633 		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
634 		    sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
635 		if (cflag) {
636 #ifdef RTF_WASCLONED
637 			if (rtm->rtm_flags & RTF_WASCLONED)
638 				delete(host_buf);
639 #elif defined(RTF_CLONED)
640 			if (rtm->rtm_flags & RTF_CLONED)
641 				delete(host_buf);
642 #else
643 			delete(host_buf);
644 #endif
645 			continue;
646 		}
647 		gettimeofday(&now, 0);
648 		if (tflag)
649 			ts_print(&now);
650 
651 		addrwidth = strlen(host_buf);
652 		if (addrwidth < W_ADDR)
653 			addrwidth = W_ADDR;
654 		llwidth = strlen(ether_str(sdl));
655 		if (W_ADDR + W_LL - addrwidth > llwidth)
656 			llwidth = W_ADDR + W_LL - addrwidth;
657 		ifname = if_indextoname(sdl->sdl_index, ifix_buf);
658 		if (!ifname)
659 			ifname = "?";
660 		ifwidth = strlen(ifname);
661 		if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
662 			ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
663 
664 		printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
665 		    llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
666 
667 		/* Print neighbor discovery specific informations */
668 		nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
669 		if (nbi) {
670 			if (nbi->expire > now.tv_sec) {
671 				printf(" %-9.9s",
672 				    sec2str(nbi->expire - now.tv_sec));
673 			} else if (nbi->expire == 0)
674 				printf(" %-9.9s", "permanent");
675 			else
676 				printf(" %-9.9s", "expired");
677 
678 			switch (nbi->state) {
679 			case ND6_LLINFO_NOSTATE:
680 				 printf(" N");
681 				 break;
682 #ifdef ND6_LLINFO_WAITDELETE
683 			case ND6_LLINFO_WAITDELETE:
684 				 printf(" W");
685 				 break;
686 #endif
687 			case ND6_LLINFO_INCOMPLETE:
688 				 printf(" I");
689 				 break;
690 			case ND6_LLINFO_REACHABLE:
691 				 printf(" R");
692 				 break;
693 			case ND6_LLINFO_STALE:
694 				 printf(" S");
695 				 break;
696 			case ND6_LLINFO_DELAY:
697 				 printf(" D");
698 				 break;
699 			case ND6_LLINFO_PROBE:
700 				 printf(" P");
701 				 break;
702 			default:
703 				 printf(" ?");
704 				 break;
705 			}
706 
707 			isrouter = nbi->isrouter;
708 			prbs = nbi->asked;
709 		} else {
710 			warnx("failed to get neighbor information");
711 			printf("  ");
712 		}
713 
714 		/*
715 		 * other flags. R: router, P: proxy, W: ??
716 		 */
717 		if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
718 			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
719 			    isrouter ? "R" : "",
720 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
721 		} else {
722 			sin = (struct sockaddr_in6 *)
723 			    (sdl->sdl_len + (char *)sdl);
724 #if 0	/* W and P are mystery even for us */
725 			snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
726 			    isrouter ? "R" : "",
727 			    !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
728 			    (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
729 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
730 #else
731 			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
732 			    isrouter ? "R" : "",
733 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
734 #endif
735 		}
736 		printf(" %s", flgbuf);
737 
738 		if (prbs)
739 			printf(" %d", prbs);
740 
741 		printf("\n");
742 	}
743 	if (buf != NULL)
744 		free(buf);
745 
746 	if (repeat) {
747 		printf("\n");
748 		fflush(stdout);
749 		sleep(repeat);
750 		goto again;
751 	}
752 }
753 
754 static struct in6_nbrinfo *
755 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
756 {
757 	static struct in6_nbrinfo nbi;
758 	int s;
759 
760 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
761 		err(1, "socket");
762 
763 	bzero(&nbi, sizeof(nbi));
764 	if_indextoname(ifindex, nbi.ifname);
765 	nbi.addr = *addr;
766 	if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
767 		if (warning)
768 			warn("ioctl(SIOCGNBRINFO_IN6)");
769 		close(s);
770 		return(NULL);
771 	}
772 
773 	close(s);
774 	return(&nbi);
775 }
776 
777 static char *
778 ether_str(struct sockaddr_dl *sdl)
779 {
780 	static char hbuf[NI_MAXHOST];
781 	char *cp;
782 
783 	if (sdl->sdl_alen == ETHER_ADDR_LEN) {
784 		strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
785 		    sizeof(hbuf));
786 	} else if (sdl->sdl_alen) {
787 		int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
788 		snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
789 	} else
790 		snprintf(hbuf, sizeof(hbuf), "(incomplete)");
791 
792 	return(hbuf);
793 }
794 
795 int
796 ndp_ether_aton(char *a, u_char *n)
797 {
798 	int i, o[6];
799 
800 	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
801 	    &o[3], &o[4], &o[5]);
802 	if (i != 6) {
803 		fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
804 		return (1);
805 	}
806 	for (i = 0; i < 6; i++)
807 		n[i] = o[i];
808 	return (0);
809 }
810 
811 void
812 usage()
813 {
814 	printf("usage: ndp [-nt] hostname\n");
815 	printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
816 	printf("       ndp [-nt] -A wait\n");
817 	printf("       ndp [-nt] -d hostname\n");
818 	printf("       ndp [-nt] -f filename\n");
819 	printf("       ndp [-nt] -i interface [flags...]\n");
820 #ifdef SIOCSDEFIFACE_IN6
821 	printf("       ndp [-nt] -I [interface|delete]\n");
822 #endif
823 	printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
824 	exit(1);
825 }
826 
827 int
828 rtmsg(int cmd)
829 {
830 	static int seq;
831 	int rlen;
832 	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
833 	register char *cp = m_rtmsg.m_space;
834 	register int l;
835 
836 	errno = 0;
837 	if (cmd == RTM_DELETE)
838 		goto doit;
839 	bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
840 	rtm->rtm_flags = flags;
841 	rtm->rtm_version = RTM_VERSION;
842 
843 	switch (cmd) {
844 	default:
845 		fprintf(stderr, "ndp: internal wrong cmd\n");
846 		exit(1);
847 	case RTM_ADD:
848 		rtm->rtm_addrs |= RTA_GATEWAY;
849 		if (expire_time) {
850 			rtm->rtm_rmx.rmx_expire = expire_time;
851 			rtm->rtm_inits = RTV_EXPIRE;
852 		}
853 		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
854 #if 0 /* we don't support ipv6addr/128 type proxying */
855 		if (rtm->rtm_flags & RTF_ANNOUNCE) {
856 			rtm->rtm_flags &= ~RTF_HOST;
857 			rtm->rtm_addrs |= RTA_NETMASK;
858 		}
859 #endif
860 		/* FALLTHROUGH */
861 	case RTM_GET:
862 		rtm->rtm_addrs |= RTA_DST;
863 	}
864 
865 	NEXTADDR(RTA_DST, sin_m);
866 	NEXTADDR(RTA_GATEWAY, sdl_m);
867 #if 0 /* we don't support ipv6addr/128 type proxying */
868 	memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
869 	NEXTADDR(RTA_NETMASK, so_mask);
870 #endif
871 
872 	rtm->rtm_msglen = cp - (char *)&m_rtmsg;
873 doit:
874 	l = rtm->rtm_msglen;
875 	rtm->rtm_seq = ++seq;
876 	rtm->rtm_type = cmd;
877 	if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
878 		if (errno != ESRCH || cmd != RTM_DELETE) {
879 			err(1, "writing to routing socket");
880 			/* NOTREACHED */
881 		}
882 	}
883 	do {
884 		l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
885 	} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
886 	if (l < 0)
887 		(void) fprintf(stderr, "ndp: read from routing socket: %s\n",
888 		    strerror(errno));
889 	return (0);
890 }
891 
892 void
893 ifinfo(char *ifname, int argc, char **argv)
894 {
895 	struct in6_ndireq nd;
896 	int i, s;
897 	u_int32_t newflags;
898 #ifdef IPV6CTL_USETEMPADDR
899 	u_int8_t nullbuf[8];
900 #endif
901 
902 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
903 		err(1, "socket");
904 		/* NOTREACHED */
905 	}
906 	bzero(&nd, sizeof(nd));
907 	strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
908 	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
909 		err(1, "ioctl(SIOCGIFINFO_IN6)");
910 		/* NOTREACHED */
911 	}
912 #define ND nd.ndi
913 	newflags = ND.flags;
914 	for (i = 0; i < argc; i++) {
915 		int clear = 0;
916 		char *cp = argv[i];
917 
918 		if (*cp == '-') {
919 			clear = 1;
920 			cp++;
921 		}
922 
923 #define SETFLAG(s, f) \
924 	do {\
925 		if (strcmp(cp, (s)) == 0) {\
926 			if (clear)\
927 				newflags &= ~(f);\
928 			else\
929 				newflags |= (f);\
930 		}\
931 	} while (0)
932 /*
933  * XXX: this macro is not 100% correct, in that it matches "nud" against
934  *      "nudbogus".  But we just let it go since this is minor.
935  */
936 #define SETVALUE(f, v) \
937 	do { \
938 		char *valptr; \
939 		unsigned long newval; \
940 		v = 0; /* unspecified */ \
941 		if (strncmp(cp, f, strlen(f)) == 0) { \
942 			valptr = strchr(cp, '='); \
943 			if (valptr == NULL) \
944 				err(1, "syntax error in %s field", (f)); \
945 			errno = 0; \
946 			newval = strtoul(++valptr, NULL, 0); \
947 			if (errno) \
948 				err(1, "syntax error in %s's value", (f)); \
949 			v = newval; \
950 		} \
951 	} while (0)
952 
953 		SETFLAG("disabled", ND6_IFF_IFDISABLED);
954 		SETFLAG("nud", ND6_IFF_PERFORMNUD);
955 #ifdef ND6_IFF_ACCEPT_RTADV
956 		SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
957 #endif
958 #ifdef ND6_IFF_AUTO_LINKLOCAL
959 		SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
960 #endif
961 #ifdef ND6_IFF_NO_PREFER_IFACE
962 		SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
963 #endif
964 		SETVALUE("basereachable", ND.basereachable);
965 		SETVALUE("retrans", ND.retrans);
966 		SETVALUE("curhlim", ND.chlim);
967 
968 		ND.flags = newflags;
969 		if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
970 			err(1, "ioctl(SIOCSIFINFO_IN6)");
971 			/* NOTREACHED */
972 		}
973 #undef SETFLAG
974 #undef SETVALUE
975 	}
976 
977 	if (!ND.initialized) {
978 		errx(1, "%s: not initialized yet", ifname);
979 		/* NOTREACHED */
980 	}
981 
982 	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
983 		err(1, "ioctl(SIOCGIFINFO_IN6)");
984 		/* NOTREACHED */
985 	}
986 	printf("linkmtu=%d", ND.linkmtu);
987 	printf(", maxmtu=%d", ND.maxmtu);
988 	printf(", curhlim=%d", ND.chlim);
989 	printf(", basereachable=%ds%dms",
990 	    ND.basereachable / 1000, ND.basereachable % 1000);
991 	printf(", reachable=%ds", ND.reachable);
992 	printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
993 #ifdef IPV6CTL_USETEMPADDR
994 	memset(nullbuf, 0, sizeof(nullbuf));
995 	if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
996 		int j;
997 		u_int8_t *rbuf;
998 
999 		for (i = 0; i < 3; i++) {
1000 			switch (i) {
1001 			case 0:
1002 				printf("\nRandom seed(0): ");
1003 				rbuf = ND.randomseed0;
1004 				break;
1005 			case 1:
1006 				printf("\nRandom seed(1): ");
1007 				rbuf = ND.randomseed1;
1008 				break;
1009 			case 2:
1010 				printf("\nRandom ID:      ");
1011 				rbuf = ND.randomid;
1012 				break;
1013 			default:
1014 				errx(1, "impossible case for tempaddr display");
1015 			}
1016 			for (j = 0; j < 8; j++)
1017 				printf("%02x", rbuf[j]);
1018 		}
1019 	}
1020 #endif
1021 	if (ND.flags) {
1022 		printf("\nFlags: ");
1023 #ifdef ND6_IFF_IFDISABLED
1024 		if ((ND.flags & ND6_IFF_IFDISABLED))
1025 			printf("disabled ");
1026 #endif
1027 		if ((ND.flags & ND6_IFF_PERFORMNUD))
1028 			printf("nud ");
1029 #ifdef ND6_IFF_ACCEPT_RTADV
1030 		if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1031 			printf("accept_rtadv ");
1032 #endif
1033 #ifdef ND6_IFF_AUTO_LINKLOCAL
1034 		if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1035 			printf("auto_linklocal ");
1036 #endif
1037 #ifdef ND6_IFF_NO_PREFER_IFACE
1038 		if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1039 			printf("no_prefer_iface ");
1040 #endif
1041 	}
1042 	putc('\n', stdout);
1043 #undef ND
1044 
1045 	close(s);
1046 }
1047 
1048 #ifndef ND_RA_FLAG_RTPREF_MASK	/* XXX: just for compilation on *BSD release */
1049 #define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
1050 #endif
1051 
1052 void
1053 rtrlist()
1054 {
1055 #ifdef ICMPV6CTL_ND6_DRLIST
1056 	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1057 	char *buf;
1058 	struct in6_defrouter *p, *ep;
1059 	size_t l;
1060 	struct timeval now;
1061 
1062 	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1063 		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1064 		/*NOTREACHED*/
1065 	}
1066 	if (l == 0)
1067 		return;
1068 	buf = malloc(l);
1069 	if (!buf) {
1070 		err(1, "malloc");
1071 		/*NOTREACHED*/
1072 	}
1073 	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1074 		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1075 		/*NOTREACHED*/
1076 	}
1077 
1078 	ep = (struct in6_defrouter *)(buf + l);
1079 	for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1080 		int rtpref;
1081 
1082 		if (getnameinfo((struct sockaddr *)&p->rtaddr,
1083 		    p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1084 		    (nflag ? NI_NUMERICHOST : 0)) != 0)
1085 			strlcpy(host_buf, "?", sizeof(host_buf));
1086 
1087 		printf("%s if=%s", host_buf,
1088 		    if_indextoname(p->if_index, ifix_buf));
1089 		printf(", flags=%s%s",
1090 		    p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1091 		    p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1092 		rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1093 		printf(", pref=%s", rtpref_str[rtpref]);
1094 
1095 		gettimeofday(&now, 0);
1096 		if (p->expire == 0)
1097 			printf(", expire=Never\n");
1098 		else
1099 			printf(", expire=%s\n",
1100 			    sec2str(p->expire - now.tv_sec));
1101 	}
1102 	free(buf);
1103 #else
1104 	struct in6_drlist dr;
1105 	int s, i;
1106 	struct timeval now;
1107 
1108 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1109 		err(1, "socket");
1110 		/* NOTREACHED */
1111 	}
1112 	bzero(&dr, sizeof(dr));
1113 	strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1114 	if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1115 		err(1, "ioctl(SIOCGDRLST_IN6)");
1116 		/* NOTREACHED */
1117 	}
1118 #define DR dr.defrouter[i]
1119 	for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1120 		struct sockaddr_in6 sin6;
1121 
1122 		bzero(&sin6, sizeof(sin6));
1123 		sin6.sin6_family = AF_INET6;
1124 		sin6.sin6_len = sizeof(sin6);
1125 		sin6.sin6_addr = DR.rtaddr;
1126 		getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1127 		    sizeof(host_buf), NULL, 0,
1128 		    (nflag ? NI_NUMERICHOST : 0));
1129 
1130 		printf("%s if=%s", host_buf,
1131 		    if_indextoname(DR.if_index, ifix_buf));
1132 		printf(", flags=%s%s",
1133 		    DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1134 		    DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1135 		gettimeofday(&now, 0);
1136 		if (DR.expire == 0)
1137 			printf(", expire=Never\n");
1138 		else
1139 			printf(", expire=%s\n",
1140 			    sec2str(DR.expire - now.tv_sec));
1141 	}
1142 #undef DR
1143 	close(s);
1144 #endif
1145 }
1146 
1147 void
1148 plist()
1149 {
1150 #ifdef ICMPV6CTL_ND6_PRLIST
1151 	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1152 	char *buf;
1153 	struct in6_prefix *p, *ep, *n;
1154 	struct sockaddr_in6 *advrtr;
1155 	size_t l;
1156 	struct timeval now;
1157 	const int niflags = NI_NUMERICHOST;
1158 	int ninflags = nflag ? NI_NUMERICHOST : 0;
1159 	char namebuf[NI_MAXHOST];
1160 
1161 	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1162 		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1163 		/*NOTREACHED*/
1164 	}
1165 	buf = malloc(l);
1166 	if (!buf) {
1167 		err(1, "malloc");
1168 		/*NOTREACHED*/
1169 	}
1170 	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1171 		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1172 		/*NOTREACHED*/
1173 	}
1174 
1175 	ep = (struct in6_prefix *)(buf + l);
1176 	for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1177 		advrtr = (struct sockaddr_in6 *)(p + 1);
1178 		n = (struct in6_prefix *)&advrtr[p->advrtrs];
1179 
1180 		if (getnameinfo((struct sockaddr *)&p->prefix,
1181 		    p->prefix.sin6_len, namebuf, sizeof(namebuf),
1182 		    NULL, 0, niflags) != 0)
1183 			strlcpy(namebuf, "?", sizeof(namebuf));
1184 		printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1185 		    if_indextoname(p->if_index, ifix_buf));
1186 
1187 		gettimeofday(&now, 0);
1188 		/*
1189 		 * meaning of fields, especially flags, is very different
1190 		 * by origin.  notify the difference to the users.
1191 		 */
1192 		printf("flags=%s%s%s%s%s",
1193 		    p->raflags.onlink ? "L" : "",
1194 		    p->raflags.autonomous ? "A" : "",
1195 		    (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1196 		    (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1197 #ifdef NDPRF_HOME
1198 		    (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1199 #else
1200 		    ""
1201 #endif
1202 		    );
1203 		if (p->vltime == ND6_INFINITE_LIFETIME)
1204 			printf(" vltime=infinity");
1205 		else
1206 			printf(" vltime=%lu", (unsigned long)p->vltime);
1207 		if (p->pltime == ND6_INFINITE_LIFETIME)
1208 			printf(", pltime=infinity");
1209 		else
1210 			printf(", pltime=%lu", (unsigned long)p->pltime);
1211 		if (p->expire == 0)
1212 			printf(", expire=Never");
1213 		else if (p->expire >= now.tv_sec)
1214 			printf(", expire=%s",
1215 			    sec2str(p->expire - now.tv_sec));
1216 		else
1217 			printf(", expired");
1218 		printf(", ref=%d", p->refcnt);
1219 		printf("\n");
1220 		/*
1221 		 * "advertising router" list is meaningful only if the prefix
1222 		 * information is from RA.
1223 		 */
1224 		if (p->advrtrs) {
1225 			int j;
1226 			struct sockaddr_in6 *sin6;
1227 
1228 			sin6 = advrtr;
1229 			printf("  advertised by\n");
1230 			for (j = 0; j < p->advrtrs; j++) {
1231 				struct in6_nbrinfo *nbi;
1232 
1233 				if (getnameinfo((struct sockaddr *)sin6,
1234 				    sin6->sin6_len, namebuf, sizeof(namebuf),
1235 				    NULL, 0, ninflags) != 0)
1236 					strlcpy(namebuf, "?", sizeof(namebuf));
1237 				printf("    %s", namebuf);
1238 
1239 				nbi = getnbrinfo(&sin6->sin6_addr,
1240 				    p->if_index, 0);
1241 				if (nbi) {
1242 					switch (nbi->state) {
1243 					case ND6_LLINFO_REACHABLE:
1244 					case ND6_LLINFO_STALE:
1245 					case ND6_LLINFO_DELAY:
1246 					case ND6_LLINFO_PROBE:
1247 						printf(" (reachable)\n");
1248 						break;
1249 					default:
1250 						printf(" (unreachable)\n");
1251 					}
1252 				} else
1253 					printf(" (no neighbor state)\n");
1254 				sin6++;
1255 			}
1256 		} else
1257 			printf("  No advertising router\n");
1258 	}
1259 	free(buf);
1260 #else
1261 	struct in6_prlist pr;
1262 	int s, i;
1263 	struct timeval now;
1264 
1265 	gettimeofday(&now, 0);
1266 
1267 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1268 		err(1, "socket");
1269 		/* NOTREACHED */
1270 	}
1271 	bzero(&pr, sizeof(pr));
1272 	strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1273 	if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1274 		err(1, "ioctl(SIOCGPRLST_IN6)");
1275 		/* NOTREACHED */
1276 	}
1277 #define PR pr.prefix[i]
1278 	for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1279 		struct sockaddr_in6 p6;
1280 		char namebuf[NI_MAXHOST];
1281 		int niflags;
1282 
1283 #ifdef NDPRF_ONLINK
1284 		p6 = PR.prefix;
1285 #else
1286 		memset(&p6, 0, sizeof(p6));
1287 		p6.sin6_family = AF_INET6;
1288 		p6.sin6_len = sizeof(p6);
1289 		p6.sin6_addr = PR.prefix;
1290 #endif
1291 		niflags = NI_NUMERICHOST;
1292 		if (getnameinfo((struct sockaddr *)&p6,
1293 		    sizeof(p6), namebuf, sizeof(namebuf),
1294 		    NULL, 0, niflags)) {
1295 			warnx("getnameinfo failed");
1296 			continue;
1297 		}
1298 		printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1299 		    if_indextoname(PR.if_index, ifix_buf));
1300 
1301 		gettimeofday(&now, 0);
1302 		/*
1303 		 * meaning of fields, especially flags, is very different
1304 		 * by origin.  notify the difference to the users.
1305 		 */
1306 #if 0
1307 		printf("  %s",
1308 		    PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1309 #endif
1310 #ifdef NDPRF_ONLINK
1311 		printf("flags=%s%s%s%s%s",
1312 		    PR.raflags.onlink ? "L" : "",
1313 		    PR.raflags.autonomous ? "A" : "",
1314 		    (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1315 		    (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1316 #ifdef NDPRF_HOME
1317 		    (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1318 #else
1319 		    ""
1320 #endif
1321 		    );
1322 #else
1323 		printf("flags=%s%s",
1324 		    PR.raflags.onlink ? "L" : "",
1325 		    PR.raflags.autonomous ? "A" : "");
1326 #endif
1327 		if (PR.vltime == ND6_INFINITE_LIFETIME)
1328 			printf(" vltime=infinity");
1329 		else
1330 			printf(" vltime=%lu", PR.vltime);
1331 		if (PR.pltime == ND6_INFINITE_LIFETIME)
1332 			printf(", pltime=infinity");
1333 		else
1334 			printf(", pltime=%lu", PR.pltime);
1335 		if (PR.expire == 0)
1336 			printf(", expire=Never");
1337 		else if (PR.expire >= now.tv_sec)
1338 			printf(", expire=%s",
1339 			    sec2str(PR.expire - now.tv_sec));
1340 		else
1341 			printf(", expired");
1342 #ifdef NDPRF_ONLINK
1343 		printf(", ref=%d", PR.refcnt);
1344 #endif
1345 #if 0
1346 		switch (PR.origin) {
1347 		case PR_ORIG_RA:
1348 			printf(", origin=RA");
1349 			break;
1350 		case PR_ORIG_RR:
1351 			printf(", origin=RR");
1352 			break;
1353 		case PR_ORIG_STATIC:
1354 			printf(", origin=static");
1355 			break;
1356 		case PR_ORIG_KERNEL:
1357 			printf(", origin=kernel");
1358 			break;
1359 		default:
1360 			printf(", origin=?");
1361 			break;
1362 		}
1363 #endif
1364 		printf("\n");
1365 		/*
1366 		 * "advertising router" list is meaningful only if the prefix
1367 		 * information is from RA.
1368 		 */
1369 		if (0 &&	/* prefix origin is almost obsolted */
1370 		    PR.origin != PR_ORIG_RA)
1371 			;
1372 		else if (PR.advrtrs) {
1373 			int j;
1374 			printf("  advertised by\n");
1375 			for (j = 0; j < PR.advrtrs; j++) {
1376 				struct sockaddr_in6 sin6;
1377 				struct in6_nbrinfo *nbi;
1378 
1379 				bzero(&sin6, sizeof(sin6));
1380 				sin6.sin6_family = AF_INET6;
1381 				sin6.sin6_len = sizeof(sin6);
1382 				sin6.sin6_addr = PR.advrtr[j];
1383 				sin6.sin6_scope_id = PR.if_index; /* XXX */
1384 				getnameinfo((struct sockaddr *)&sin6,
1385 				    sin6.sin6_len, host_buf,
1386 				    sizeof(host_buf), NULL, 0,
1387 				    (nflag ? NI_NUMERICHOST : 0));
1388 				printf("    %s", host_buf);
1389 
1390 				nbi = getnbrinfo(&sin6.sin6_addr,
1391 				    PR.if_index, 0);
1392 				if (nbi) {
1393 					switch (nbi->state) {
1394 					case ND6_LLINFO_REACHABLE:
1395 					case ND6_LLINFO_STALE:
1396 					case ND6_LLINFO_DELAY:
1397 					case ND6_LLINFO_PROBE:
1398 						 printf(" (reachable)\n");
1399 						 break;
1400 					default:
1401 						 printf(" (unreachable)\n");
1402 					}
1403 				} else
1404 					printf(" (no neighbor state)\n");
1405 			}
1406 			if (PR.advrtrs > DRLSTSIZ)
1407 				printf("    and %d routers\n",
1408 				    PR.advrtrs - DRLSTSIZ);
1409 		} else
1410 			printf("  No advertising router\n");
1411 	}
1412 #undef PR
1413 	close(s);
1414 #endif
1415 }
1416 
1417 void
1418 pfx_flush()
1419 {
1420 	char dummyif[IFNAMSIZ+8];
1421 	int s;
1422 
1423 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1424 		err(1, "socket");
1425 	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1426 	if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1427 		err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1428 }
1429 
1430 void
1431 rtr_flush()
1432 {
1433 	char dummyif[IFNAMSIZ+8];
1434 	int s;
1435 
1436 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1437 		err(1, "socket");
1438 	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1439 	if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1440 		err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1441 
1442 	close(s);
1443 }
1444 
1445 void
1446 harmonize_rtr()
1447 {
1448 	char dummyif[IFNAMSIZ+8];
1449 	int s;
1450 
1451 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1452 		err(1, "socket");
1453 	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1454 	if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1455 		err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1456 
1457 	close(s);
1458 }
1459 
1460 #ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
1461 static void
1462 setdefif(char *ifname)
1463 {
1464 	struct in6_ndifreq ndifreq;
1465 	unsigned int ifindex;
1466 
1467 	if (strcasecmp(ifname, "delete") == 0)
1468 		ifindex = 0;
1469 	else {
1470 		if ((ifindex = if_nametoindex(ifname)) == 0)
1471 			err(1, "failed to resolve i/f index for %s", ifname);
1472 	}
1473 
1474 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1475 		err(1, "socket");
1476 
1477 	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1478 	ndifreq.ifindex = ifindex;
1479 
1480 	if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1481 		err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1482 
1483 	close(s);
1484 }
1485 
1486 static void
1487 getdefif()
1488 {
1489 	struct in6_ndifreq ndifreq;
1490 	char ifname[IFNAMSIZ+8];
1491 
1492 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1493 		err(1, "socket");
1494 
1495 	memset(&ndifreq, 0, sizeof(ndifreq));
1496 	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1497 
1498 	if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1499 		err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1500 
1501 	if (ndifreq.ifindex == 0)
1502 		printf("No default interface.\n");
1503 	else {
1504 		if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1505 			err(1, "failed to resolve ifname for index %lu",
1506 			    ndifreq.ifindex);
1507 		printf("ND default interface = %s\n", ifname);
1508 	}
1509 
1510 	close(s);
1511 }
1512 #endif
1513 
1514 static char *
1515 sec2str(time_t total)
1516 {
1517 	static char result[256];
1518 	int days, hours, mins, secs;
1519 	int first = 1;
1520 	char *p = result;
1521 	char *ep = &result[sizeof(result)];
1522 	int n;
1523 
1524 	days = total / 3600 / 24;
1525 	hours = (total / 3600) % 24;
1526 	mins = (total / 60) % 60;
1527 	secs = total % 60;
1528 
1529 	if (days) {
1530 		first = 0;
1531 		n = snprintf(p, ep - p, "%dd", days);
1532 		if (n < 0 || n >= ep - p)
1533 			return "?";
1534 		p += n;
1535 	}
1536 	if (!first || hours) {
1537 		first = 0;
1538 		n = snprintf(p, ep - p, "%dh", hours);
1539 		if (n < 0 || n >= ep - p)
1540 			return "?";
1541 		p += n;
1542 	}
1543 	if (!first || mins) {
1544 		first = 0;
1545 		n = snprintf(p, ep - p, "%dm", mins);
1546 		if (n < 0 || n >= ep - p)
1547 			return "?";
1548 		p += n;
1549 	}
1550 	snprintf(p, ep - p, "%ds", secs);
1551 
1552 	return(result);
1553 }
1554 
1555 /*
1556  * Print the timestamp
1557  * from tcpdump/util.c
1558  */
1559 static void
1560 ts_print(const struct timeval *tvp)
1561 {
1562 	int s;
1563 
1564 	/* Default */
1565 	s = (tvp->tv_sec + thiszone) % 86400;
1566 	(void)printf("%02d:%02d:%02d.%06u ",
1567 	    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1568 }
1569 
1570 #undef NEXTADDR
1571