xref: /freebsd/usr.sbin/ndp/ndp.c (revision 39beb93c3f8bdbf72a61fda42300b5ebed7390c8)
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 /* packing rule for routing socket */
113 #define ROUNDUP(a) \
114 	((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
115 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
116 
117 #define NEXTADDR(w, s) \
118 	if (rtm->rtm_addrs & (w)) { \
119 		bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);}
120 
121 
122 static pid_t pid;
123 static int nflag;
124 static int tflag;
125 static int32_t thiszone;	/* time difference with gmt */
126 static int s = -1;
127 static int repeat = 0;
128 
129 char ntop_buf[INET6_ADDRSTRLEN];	/* inet_ntop() */
130 char host_buf[NI_MAXHOST];		/* getnameinfo() */
131 char ifix_buf[IFNAMSIZ];		/* if_indextoname() */
132 
133 int main(int, char **);
134 int file(char *);
135 void getsocket(void);
136 int set(int, char **);
137 void get(char *);
138 int delete(char *);
139 void dump(struct in6_addr *, int);
140 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
141 static char *ether_str(struct sockaddr_dl *);
142 int ndp_ether_aton(char *, u_char *);
143 void usage(void);
144 int rtmsg(int);
145 void ifinfo(char *, int, char **);
146 void rtrlist(void);
147 void plist(void);
148 void pfx_flush(void);
149 void rtr_flush(void);
150 void harmonize_rtr(void);
151 #ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
152 static void getdefif(void);
153 static void setdefif(char *);
154 #endif
155 static char *sec2str(time_t);
156 static char *ether_str(struct sockaddr_dl *);
157 static void ts_print(const struct timeval *);
158 
159 #ifdef ICMPV6CTL_ND6_DRLIST
160 static char *rtpref_str[] = {
161 	"medium",		/* 00 */
162 	"high",			/* 01 */
163 	"rsv",			/* 10 */
164 	"low"			/* 11 */
165 };
166 #endif
167 
168 int mode = 0;
169 char *arg = NULL;
170 
171 int
172 main(argc, argv)
173 	int argc;
174 	char **argv;
175 {
176 	int ch;
177 
178 	pid = getpid();
179 	thiszone = gmt2local(0);
180 	while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
181 		switch (ch) {
182 		case 'a':
183 		case 'c':
184 		case 'p':
185 		case 'r':
186 		case 'H':
187 		case 'P':
188 		case 'R':
189 		case 's':
190 		case 'I':
191 			if (mode) {
192 				usage();
193 				/*NOTREACHED*/
194 			}
195 			mode = ch;
196 			arg = NULL;
197 			break;
198 		case 'd':
199 		case 'f':
200 		case 'i' :
201 			if (mode) {
202 				usage();
203 				/*NOTREACHED*/
204 			}
205 			mode = ch;
206 			arg = optarg;
207 			break;
208 		case 'n':
209 			nflag = 1;
210 			break;
211 		case 't':
212 			tflag = 1;
213 			break;
214 		case 'A':
215 			if (mode) {
216 				usage();
217 				/*NOTREACHED*/
218 			}
219 			mode = 'a';
220 			repeat = atoi(optarg);
221 			if (repeat < 0) {
222 				usage();
223 				/*NOTREACHED*/
224 			}
225 			break;
226 		default:
227 			usage();
228 		}
229 
230 	argc -= optind;
231 	argv += optind;
232 
233 	switch (mode) {
234 	case 'a':
235 	case 'c':
236 		if (argc != 0) {
237 			usage();
238 			/*NOTREACHED*/
239 		}
240 		dump(0, mode == 'c');
241 		break;
242 	case 'd':
243 		if (argc != 0) {
244 			usage();
245 			/*NOTREACHED*/
246 		}
247 		delete(arg);
248 		break;
249 	case 'I':
250 #ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
251 		if (argc > 1) {
252 			usage();
253 			/*NOTREACHED*/
254 		} else if (argc == 1) {
255 			if (strcmp(*argv, "delete") == 0 ||
256 			    if_nametoindex(*argv))
257 				setdefif(*argv);
258 			else
259 				errx(1, "invalid interface %s", *argv);
260 		}
261 		getdefif(); /* always call it to print the result */
262 		break;
263 #else
264 		errx(1, "not supported yet");
265 		/*NOTREACHED*/
266 #endif
267 	case 'p':
268 		if (argc != 0) {
269 			usage();
270 			/*NOTREACHED*/
271 		}
272 		plist();
273 		break;
274 	case 'i':
275 		ifinfo(arg, argc, argv);
276 		break;
277 	case 'r':
278 		if (argc != 0) {
279 			usage();
280 			/*NOTREACHED*/
281 		}
282 		rtrlist();
283 		break;
284 	case 's':
285 		if (argc < 2 || argc > 4)
286 			usage();
287 		exit(set(argc, argv) ? 1 : 0);
288 	case 'H':
289 		if (argc != 0) {
290 			usage();
291 			/*NOTREACHED*/
292 		}
293 		harmonize_rtr();
294 		break;
295 	case 'P':
296 		if (argc != 0) {
297 			usage();
298 			/*NOTREACHED*/
299 		}
300 		pfx_flush();
301 		break;
302 	case 'R':
303 		if (argc != 0) {
304 			usage();
305 			/*NOTREACHED*/
306 		}
307 		rtr_flush();
308 		break;
309 	case 0:
310 		if (argc != 1) {
311 			usage();
312 			/*NOTREACHED*/
313 		}
314 		get(argv[0]);
315 		break;
316 	}
317 	exit(0);
318 }
319 
320 /*
321  * Process a file to set standard ndp entries
322  */
323 int
324 file(name)
325 	char *name;
326 {
327 	FILE *fp;
328 	int i, retval;
329 	char line[100], arg[5][50], *args[5];
330 
331 	if ((fp = fopen(name, "r")) == NULL) {
332 		fprintf(stderr, "ndp: cannot open %s\n", name);
333 		exit(1);
334 	}
335 	args[0] = &arg[0][0];
336 	args[1] = &arg[1][0];
337 	args[2] = &arg[2][0];
338 	args[3] = &arg[3][0];
339 	args[4] = &arg[4][0];
340 	retval = 0;
341 	while (fgets(line, sizeof(line), fp) != NULL) {
342 		i = sscanf(line, "%49s %49s %49s %49s %49s",
343 		    arg[0], arg[1], arg[2], arg[3], arg[4]);
344 		if (i < 2) {
345 			fprintf(stderr, "ndp: bad line: %s\n", line);
346 			retval = 1;
347 			continue;
348 		}
349 		if (set(i, args))
350 			retval = 1;
351 	}
352 	fclose(fp);
353 	return (retval);
354 }
355 
356 void
357 getsocket()
358 {
359 	if (s < 0) {
360 		s = socket(PF_ROUTE, SOCK_RAW, 0);
361 		if (s < 0) {
362 			err(1, "socket");
363 			/* NOTREACHED */
364 		}
365 	}
366 }
367 
368 struct	sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
369 struct	sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
370 struct	sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
371 int	expire_time, flags, found_entry;
372 struct	{
373 	struct	rt_msghdr m_rtm;
374 	char	m_space[512];
375 }	m_rtmsg;
376 
377 /*
378  * Set an individual neighbor cache entry
379  */
380 int
381 set(argc, argv)
382 	int argc;
383 	char **argv;
384 {
385 	register struct sockaddr_in6 *sin = &sin_m;
386 	register struct sockaddr_dl *sdl;
387 	register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
388 	struct addrinfo hints, *res;
389 	int gai_error;
390 	u_char *ea;
391 	char *host = argv[0], *eaddr = argv[1];
392 
393 	getsocket();
394 	argc -= 2;
395 	argv += 2;
396 	sdl_m = blank_sdl;
397 	sin_m = blank_sin;
398 
399 	bzero(&hints, sizeof(hints));
400 	hints.ai_family = AF_INET6;
401 	gai_error = getaddrinfo(host, NULL, &hints, &res);
402 	if (gai_error) {
403 		fprintf(stderr, "ndp: %s: %s\n", host,
404 			gai_strerror(gai_error));
405 		return 1;
406 	}
407 	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
408 #ifdef __KAME__
409 	if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
410 		*(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
411 		    htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
412 	}
413 #endif
414 	ea = (u_char *)LLADDR(&sdl_m);
415 	if (ndp_ether_aton(eaddr, ea) == 0)
416 		sdl_m.sdl_alen = 6;
417 	flags = expire_time = 0;
418 	while (argc-- > 0) {
419 		if (strncmp(argv[0], "temp", 4) == 0) {
420 			struct timeval time;
421 
422 			gettimeofday(&time, 0);
423 			expire_time = time.tv_sec + 20 * 60;
424 		} else if (strncmp(argv[0], "proxy", 5) == 0)
425 			flags |= RTF_ANNOUNCE;
426 		argv++;
427 	}
428 	if (rtmsg(RTM_GET) < 0) {
429 		errx(1, "RTM_GET(%s) failed", host);
430 		/* NOTREACHED */
431 	}
432 	sin = (struct sockaddr_in6 *)(rtm + 1);
433 	sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
434 	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
435 		if (sdl->sdl_family == AF_LINK &&
436 		    !(rtm->rtm_flags & RTF_GATEWAY)) {
437 			switch (sdl->sdl_type) {
438 			case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
439 			case IFT_ISO88024: case IFT_ISO88025:
440 				goto overwrite;
441 			}
442 		}
443 		/*
444 		 * IPv4 arp command retries with sin_other = SIN_PROXY here.
445 		 */
446 		fprintf(stderr, "set: cannot configure a new entry\n");
447 		return 1;
448 	}
449 
450 overwrite:
451 	if (sdl->sdl_family != AF_LINK) {
452 		printf("cannot intuit interface index and type for %s\n", host);
453 		return (1);
454 	}
455 	sdl_m.sdl_type = sdl->sdl_type;
456 	sdl_m.sdl_index = sdl->sdl_index;
457 	return (rtmsg(RTM_ADD));
458 }
459 
460 /*
461  * Display an individual neighbor cache entry
462  */
463 void
464 get(host)
465 	char *host;
466 {
467 	struct sockaddr_in6 *sin = &sin_m;
468 	struct addrinfo hints, *res;
469 	int gai_error;
470 
471 	sin_m = blank_sin;
472 	bzero(&hints, sizeof(hints));
473 	hints.ai_family = AF_INET6;
474 	gai_error = getaddrinfo(host, NULL, &hints, &res);
475 	if (gai_error) {
476 		fprintf(stderr, "ndp: %s: %s\n", host,
477 		    gai_strerror(gai_error));
478 		return;
479 	}
480 	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
481 #ifdef __KAME__
482 	if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
483 		*(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
484 		    htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
485 	}
486 #endif
487 	dump(&sin->sin6_addr, 0);
488 	if (found_entry == 0) {
489 		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
490 		    sizeof(host_buf), NULL ,0,
491 		    (nflag ? NI_NUMERICHOST : 0));
492 		printf("%s (%s) -- no entry\n", host, host_buf);
493 		exit(1);
494 	}
495 }
496 
497 /*
498  * Delete a neighbor cache entry
499  */
500 int
501 delete(host)
502 	char *host;
503 {
504 	struct sockaddr_in6 *sin = &sin_m;
505 	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
506 	register char *cp = m_rtmsg.m_space;
507 	struct sockaddr_dl *sdl;
508 	struct addrinfo hints, *res;
509 	int gai_error;
510 
511 	getsocket();
512 	sin_m = blank_sin;
513 
514 	bzero(&hints, sizeof(hints));
515 	hints.ai_family = AF_INET6;
516 	gai_error = getaddrinfo(host, NULL, &hints, &res);
517 	if (gai_error) {
518 		fprintf(stderr, "ndp: %s: %s\n", host,
519 		    gai_strerror(gai_error));
520 		return 1;
521 	}
522 	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
523 #ifdef __KAME__
524 	if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
525 		*(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
526 		    htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
527 	}
528 #endif
529 	if (rtmsg(RTM_GET) < 0) {
530 		errx(1, "RTM_GET(%s) failed", host);
531 		/* NOTREACHED */
532 	}
533 	sin = (struct sockaddr_in6 *)(rtm + 1);
534 	sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
535 	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
536 		if (sdl->sdl_family == AF_LINK &&
537 		    !(rtm->rtm_flags & RTF_GATEWAY)) {
538 			goto delete;
539 		}
540 		/*
541 		 * IPv4 arp command retries with sin_other = SIN_PROXY here.
542 		 */
543 		fprintf(stderr, "delete: cannot delete non-NDP entry\n");
544 		return 1;
545 	}
546 
547 delete:
548 	if (sdl->sdl_family != AF_LINK) {
549 		printf("cannot locate %s\n", host);
550 		return (1);
551 	}
552         /*
553          * need to reinit the field because it has rt_key
554          * but we want the actual address
555          */
556 	NEXTADDR(RTA_DST, sin_m);
557 	rtm->rtm_flags |= RTF_LLDATA;
558 	if (rtmsg(RTM_DELETE) == 0) {
559 		struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
560 
561 #ifdef __KAME__
562 		if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
563 			s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
564 			*(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
565 		}
566 #endif
567 		getnameinfo((struct sockaddr *)&s6,
568 		    s6.sin6_len, host_buf,
569 		    sizeof(host_buf), NULL, 0,
570 		    (nflag ? NI_NUMERICHOST : 0));
571 		printf("%s (%s) deleted\n", host, host_buf);
572 	}
573 
574 	return 0;
575 }
576 
577 #define W_ADDR	36
578 #define W_LL	17
579 #define W_IF	6
580 
581 /*
582  * Dump the entire neighbor cache
583  */
584 void
585 dump(addr, cflag)
586 	struct in6_addr *addr;
587 	int cflag;
588 {
589 	int mib[6];
590 	size_t needed;
591 	char *lim, *buf, *next;
592 	struct rt_msghdr *rtm;
593 	struct sockaddr_in6 *sin;
594 	struct sockaddr_dl *sdl;
595 	extern int h_errno;
596 	struct in6_nbrinfo *nbi;
597 	struct timeval time;
598 	int addrwidth;
599 	int llwidth;
600 	int ifwidth;
601 	char flgbuf[8];
602 	char *ifname;
603 
604 	/* Print header */
605 	if (!tflag && !cflag)
606 		printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
607 		    W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
608 		    W_IF, W_IF, "Netif", "Expire", "S", "Flags");
609 
610 again:;
611 	mib[0] = CTL_NET;
612 	mib[1] = PF_ROUTE;
613 	mib[2] = 0;
614 	mib[3] = AF_INET6;
615 	mib[4] = NET_RT_FLAGS;
616 #ifdef RTF_LLINFO
617 	mib[5] = RTF_LLINFO;
618 #else
619 	mib[5] = 0;
620 #endif
621 	if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
622 		err(1, "sysctl(PF_ROUTE estimate)");
623 	if (needed > 0) {
624 		if ((buf = malloc(needed)) == NULL)
625 			err(1, "malloc");
626 		if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
627 			err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
628 		lim = buf + needed;
629 	} else
630 		buf = lim = NULL;
631 
632 	for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
633 		int isrouter = 0, prbs = 0;
634 
635 		rtm = (struct rt_msghdr *)next;
636 		sin = (struct sockaddr_in6 *)(rtm + 1);
637 		sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
638 
639 		/*
640 		 * Some OSes can produce a route that has the LINK flag but
641 		 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
642 		 * and BSD/OS, where xx is not the interface identifier on
643 		 * lo0).  Such routes entry would annoy getnbrinfo() below,
644 		 * so we skip them.
645 		 * XXX: such routes should have the GATEWAY flag, not the
646 		 * LINK flag.  However, there is rotten routing software
647 		 * that advertises all routes that have the GATEWAY flag.
648 		 * Thus, KAME kernel intentionally does not set the LINK flag.
649 		 * What is to be fixed is not ndp, but such routing software
650 		 * (and the kernel workaround)...
651 		 */
652 		if (sdl->sdl_family != AF_LINK)
653 			continue;
654 
655 		if (!(rtm->rtm_flags & RTF_HOST))
656 			continue;
657 
658 		if (addr) {
659 			if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
660 				continue;
661 			found_entry = 1;
662 		} else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
663 			continue;
664 		if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
665 		    IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
666 			/* XXX: should scope id be filled in the kernel? */
667 			if (sin->sin6_scope_id == 0)
668 				sin->sin6_scope_id = sdl->sdl_index;
669 #ifdef __KAME__
670 			/* KAME specific hack; removed the embedded id */
671 			*(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
672 #endif
673 		}
674 		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
675 		    sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
676 		if (cflag) {
677 #ifdef RTF_WASCLONED
678 			if (rtm->rtm_flags & RTF_WASCLONED)
679 				delete(host_buf);
680 #elif defined(RTF_CLONED)
681 			if (rtm->rtm_flags & RTF_CLONED)
682 				delete(host_buf);
683 #else
684 			delete(host_buf);
685 #endif
686 			continue;
687 		}
688 		gettimeofday(&time, 0);
689 		if (tflag)
690 			ts_print(&time);
691 
692 		addrwidth = strlen(host_buf);
693 		if (addrwidth < W_ADDR)
694 			addrwidth = W_ADDR;
695 		llwidth = strlen(ether_str(sdl));
696 		if (W_ADDR + W_LL - addrwidth > llwidth)
697 			llwidth = W_ADDR + W_LL - addrwidth;
698 		ifname = if_indextoname(sdl->sdl_index, ifix_buf);
699 		if (!ifname)
700 			ifname = "?";
701 		ifwidth = strlen(ifname);
702 		if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
703 			ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
704 
705 		printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
706 		    llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
707 
708 		/* Print neighbor discovery specific informations */
709 		nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
710 		if (nbi) {
711 			if (nbi->expire > time.tv_sec) {
712 				printf(" %-9.9s",
713 				    sec2str(nbi->expire - time.tv_sec));
714 			} else if (nbi->expire == 0)
715 				printf(" %-9.9s", "permanent");
716 			else
717 				printf(" %-9.9s", "expired");
718 
719 			switch (nbi->state) {
720 			case ND6_LLINFO_NOSTATE:
721 				 printf(" N");
722 				 break;
723 #ifdef ND6_LLINFO_WAITDELETE
724 			case ND6_LLINFO_WAITDELETE:
725 				 printf(" W");
726 				 break;
727 #endif
728 			case ND6_LLINFO_INCOMPLETE:
729 				 printf(" I");
730 				 break;
731 			case ND6_LLINFO_REACHABLE:
732 				 printf(" R");
733 				 break;
734 			case ND6_LLINFO_STALE:
735 				 printf(" S");
736 				 break;
737 			case ND6_LLINFO_DELAY:
738 				 printf(" D");
739 				 break;
740 			case ND6_LLINFO_PROBE:
741 				 printf(" P");
742 				 break;
743 			default:
744 				 printf(" ?");
745 				 break;
746 			}
747 
748 			isrouter = nbi->isrouter;
749 			prbs = nbi->asked;
750 		} else {
751 			warnx("failed to get neighbor information");
752 			printf("  ");
753 		}
754 
755 		/*
756 		 * other flags. R: router, P: proxy, W: ??
757 		 */
758 		if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
759 			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
760 			    isrouter ? "R" : "",
761 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
762 		} else {
763 			sin = (struct sockaddr_in6 *)
764 			    (sdl->sdl_len + (char *)sdl);
765 #if 0	/* W and P are mystery even for us */
766 			snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
767 			    isrouter ? "R" : "",
768 			    !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
769 			    (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
770 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
771 #else
772 			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
773 			    isrouter ? "R" : "",
774 			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
775 #endif
776 		}
777 		printf(" %s", flgbuf);
778 
779 		if (prbs)
780 			printf(" %d", prbs);
781 
782 		printf("\n");
783 	}
784 	if (buf != NULL)
785 		free(buf);
786 
787 	if (repeat) {
788 		printf("\n");
789 		fflush(stdout);
790 		sleep(repeat);
791 		goto again;
792 	}
793 }
794 
795 static struct in6_nbrinfo *
796 getnbrinfo(addr, ifindex, warning)
797 	struct in6_addr *addr;
798 	int ifindex;
799 	int warning;
800 {
801 	static struct in6_nbrinfo nbi;
802 	int s;
803 
804 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
805 		err(1, "socket");
806 
807 	bzero(&nbi, sizeof(nbi));
808 	if_indextoname(ifindex, nbi.ifname);
809 	nbi.addr = *addr;
810 	if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
811 		if (warning)
812 			warn("ioctl(SIOCGNBRINFO_IN6)");
813 		close(s);
814 		return(NULL);
815 	}
816 
817 	close(s);
818 	return(&nbi);
819 }
820 
821 static char *
822 ether_str(sdl)
823 	struct sockaddr_dl *sdl;
824 {
825 	static char hbuf[NI_MAXHOST];
826 	u_char *cp;
827 
828 	if (sdl->sdl_alen) {
829 		cp = (u_char *)LLADDR(sdl);
830 		snprintf(hbuf, sizeof(hbuf), "%x:%x:%x:%x:%x:%x",
831 		    cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
832 	} else
833 		snprintf(hbuf, sizeof(hbuf), "(incomplete)");
834 
835 	return(hbuf);
836 }
837 
838 int
839 ndp_ether_aton(a, n)
840 	char *a;
841 	u_char *n;
842 {
843 	int i, o[6];
844 
845 	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
846 	    &o[3], &o[4], &o[5]);
847 	if (i != 6) {
848 		fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
849 		return (1);
850 	}
851 	for (i = 0; i < 6; i++)
852 		n[i] = o[i];
853 	return (0);
854 }
855 
856 void
857 usage()
858 {
859 	printf("usage: ndp [-nt] hostname\n");
860 	printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
861 	printf("       ndp [-nt] -A wait\n");
862 	printf("       ndp [-nt] -d hostname\n");
863 	printf("       ndp [-nt] -f filename\n");
864 	printf("       ndp [-nt] -i interface [flags...]\n");
865 #ifdef SIOCSDEFIFACE_IN6
866 	printf("       ndp [-nt] -I [interface|delete]\n");
867 #endif
868 	printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
869 	exit(1);
870 }
871 
872 int
873 rtmsg(cmd)
874 	int cmd;
875 {
876 	static int seq;
877 	int rlen;
878 	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
879 	register char *cp = m_rtmsg.m_space;
880 	register int l;
881 
882 	errno = 0;
883 	if (cmd == RTM_DELETE)
884 		goto doit;
885 	bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
886 	rtm->rtm_flags = flags;
887 	rtm->rtm_version = RTM_VERSION;
888 
889 	switch (cmd) {
890 	default:
891 		fprintf(stderr, "ndp: internal wrong cmd\n");
892 		exit(1);
893 	case RTM_ADD:
894 		rtm->rtm_addrs |= RTA_GATEWAY;
895 		if (expire_time) {
896 			rtm->rtm_rmx.rmx_expire = expire_time;
897 			rtm->rtm_inits = RTV_EXPIRE;
898 		}
899 		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
900 #if 0 /* we don't support ipv6addr/128 type proxying */
901 		if (rtm->rtm_flags & RTF_ANNOUNCE) {
902 			rtm->rtm_flags &= ~RTF_HOST;
903 			rtm->rtm_addrs |= RTA_NETMASK;
904 		}
905 #endif
906 		/* FALLTHROUGH */
907 	case RTM_GET:
908 		rtm->rtm_addrs |= RTA_DST;
909 	}
910 
911 	NEXTADDR(RTA_DST, sin_m);
912 	NEXTADDR(RTA_GATEWAY, sdl_m);
913 #if 0 /* we don't support ipv6addr/128 type proxying */
914 	memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
915 	NEXTADDR(RTA_NETMASK, so_mask);
916 #endif
917 
918 	rtm->rtm_msglen = cp - (char *)&m_rtmsg;
919 doit:
920 	l = rtm->rtm_msglen;
921 	rtm->rtm_seq = ++seq;
922 	rtm->rtm_type = cmd;
923 	if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
924 		if (errno != ESRCH || cmd != RTM_DELETE) {
925 			err(1, "writing to routing socket");
926 			/* NOTREACHED */
927 		}
928 	}
929 	do {
930 		l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
931 	} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
932 	if (l < 0)
933 		(void) fprintf(stderr, "ndp: read from routing socket: %s\n",
934 		    strerror(errno));
935 	return (0);
936 }
937 
938 void
939 ifinfo(ifname, argc, argv)
940 	char *ifname;
941 	int argc;
942 	char **argv;
943 {
944 	struct in6_ndireq nd;
945 	int i, s;
946 	u_int32_t newflags;
947 #ifdef IPV6CTL_USETEMPADDR
948 	u_int8_t nullbuf[8];
949 #endif
950 
951 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
952 		err(1, "socket");
953 		/* NOTREACHED */
954 	}
955 	bzero(&nd, sizeof(nd));
956 	strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
957 	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
958 		err(1, "ioctl(SIOCGIFINFO_IN6)");
959 		/* NOTREACHED */
960 	}
961 #define ND nd.ndi
962 	newflags = ND.flags;
963 	for (i = 0; i < argc; i++) {
964 		int clear = 0;
965 		char *cp = argv[i];
966 
967 		if (*cp == '-') {
968 			clear = 1;
969 			cp++;
970 		}
971 
972 #define SETFLAG(s, f) \
973 	do {\
974 		if (strcmp(cp, (s)) == 0) {\
975 			if (clear)\
976 				newflags &= ~(f);\
977 			else\
978 				newflags |= (f);\
979 		}\
980 	} while (0)
981 /*
982  * XXX: this macro is not 100% correct, in that it matches "nud" against
983  *      "nudbogus".  But we just let it go since this is minor.
984  */
985 #define SETVALUE(f, v) \
986 	do { \
987 		char *valptr; \
988 		unsigned long newval; \
989 		v = 0; /* unspecified */ \
990 		if (strncmp(cp, f, strlen(f)) == 0) { \
991 			valptr = strchr(cp, '='); \
992 			if (valptr == NULL) \
993 				err(1, "syntax error in %s field", (f)); \
994 			errno = 0; \
995 			newval = strtoul(++valptr, NULL, 0); \
996 			if (errno) \
997 				err(1, "syntax error in %s's value", (f)); \
998 			v = newval; \
999 		} \
1000 	} while (0)
1001 
1002 		SETFLAG("disabled", ND6_IFF_IFDISABLED);
1003 		SETFLAG("nud", ND6_IFF_PERFORMNUD);
1004 #ifdef ND6_IFF_ACCEPT_RTADV
1005 		SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
1006 #endif
1007 #ifdef ND6_IFF_PREFER_SOURCE
1008 		SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE);
1009 #endif
1010 		SETVALUE("basereachable", ND.basereachable);
1011 		SETVALUE("retrans", ND.retrans);
1012 		SETVALUE("curhlim", ND.chlim);
1013 
1014 		ND.flags = newflags;
1015 		if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
1016 			err(1, "ioctl(SIOCSIFINFO_IN6)");
1017 			/* NOTREACHED */
1018 		}
1019 #undef SETFLAG
1020 #undef SETVALUE
1021 	}
1022 
1023 	if (!ND.initialized) {
1024 		errx(1, "%s: not initialized yet", ifname);
1025 		/* NOTREACHED */
1026 	}
1027 
1028 	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1029 		err(1, "ioctl(SIOCGIFINFO_IN6)");
1030 		/* NOTREACHED */
1031 	}
1032 	printf("linkmtu=%d", ND.linkmtu);
1033 	printf(", maxmtu=%d", ND.maxmtu);
1034 	printf(", curhlim=%d", ND.chlim);
1035 	printf(", basereachable=%ds%dms",
1036 	    ND.basereachable / 1000, ND.basereachable % 1000);
1037 	printf(", reachable=%ds", ND.reachable);
1038 	printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
1039 #ifdef IPV6CTL_USETEMPADDR
1040 	memset(nullbuf, 0, sizeof(nullbuf));
1041 	if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1042 		int j;
1043 		u_int8_t *rbuf;
1044 
1045 		for (i = 0; i < 3; i++) {
1046 			switch (i) {
1047 			case 0:
1048 				printf("\nRandom seed(0): ");
1049 				rbuf = ND.randomseed0;
1050 				break;
1051 			case 1:
1052 				printf("\nRandom seed(1): ");
1053 				rbuf = ND.randomseed1;
1054 				break;
1055 			case 2:
1056 				printf("\nRandom ID:      ");
1057 				rbuf = ND.randomid;
1058 				break;
1059 			default:
1060 				errx(1, "impossible case for tempaddr display");
1061 			}
1062 			for (j = 0; j < 8; j++)
1063 				printf("%02x", rbuf[j]);
1064 		}
1065 	}
1066 #endif
1067 	if (ND.flags) {
1068 		printf("\nFlags: ");
1069 #ifdef ND6_IFF_IFDISABLED
1070 		if ((ND.flags & ND6_IFF_IFDISABLED))
1071 			printf("disabled ");
1072 #endif
1073 		if ((ND.flags & ND6_IFF_PERFORMNUD))
1074 			printf("nud ");
1075 #ifdef ND6_IFF_ACCEPT_RTADV
1076 		if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1077 			printf("accept_rtadv ");
1078 #endif
1079 #ifdef ND6_IFF_PREFER_SOURCE
1080 		if ((ND.flags & ND6_IFF_PREFER_SOURCE))
1081 			printf("prefer_source ");
1082 #endif
1083 	}
1084 	putc('\n', stdout);
1085 #undef ND
1086 
1087 	close(s);
1088 }
1089 
1090 #ifndef ND_RA_FLAG_RTPREF_MASK	/* XXX: just for compilation on *BSD release */
1091 #define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
1092 #endif
1093 
1094 void
1095 rtrlist()
1096 {
1097 #ifdef ICMPV6CTL_ND6_DRLIST
1098 	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1099 	char *buf;
1100 	struct in6_defrouter *p, *ep;
1101 	size_t l;
1102 	struct timeval time;
1103 
1104 	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1105 		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1106 		/*NOTREACHED*/
1107 	}
1108 	if (l == 0)
1109 		return;
1110 	buf = malloc(l);
1111 	if (!buf) {
1112 		err(1, "malloc");
1113 		/*NOTREACHED*/
1114 	}
1115 	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1116 		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1117 		/*NOTREACHED*/
1118 	}
1119 
1120 	ep = (struct in6_defrouter *)(buf + l);
1121 	for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1122 		int rtpref;
1123 
1124 		if (getnameinfo((struct sockaddr *)&p->rtaddr,
1125 		    p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1126 		    (nflag ? NI_NUMERICHOST : 0)) != 0)
1127 			strlcpy(host_buf, "?", sizeof(host_buf));
1128 
1129 		printf("%s if=%s", host_buf,
1130 		    if_indextoname(p->if_index, ifix_buf));
1131 		printf(", flags=%s%s",
1132 		    p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1133 		    p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1134 		rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1135 		printf(", pref=%s", rtpref_str[rtpref]);
1136 
1137 		gettimeofday(&time, 0);
1138 		if (p->expire == 0)
1139 			printf(", expire=Never\n");
1140 		else
1141 			printf(", expire=%s\n",
1142 			    sec2str(p->expire - time.tv_sec));
1143 	}
1144 	free(buf);
1145 #else
1146 	struct in6_drlist dr;
1147 	int s, i;
1148 	struct timeval time;
1149 
1150 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1151 		err(1, "socket");
1152 		/* NOTREACHED */
1153 	}
1154 	bzero(&dr, sizeof(dr));
1155 	strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1156 	if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1157 		err(1, "ioctl(SIOCGDRLST_IN6)");
1158 		/* NOTREACHED */
1159 	}
1160 #define DR dr.defrouter[i]
1161 	for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1162 		struct sockaddr_in6 sin6;
1163 
1164 		bzero(&sin6, sizeof(sin6));
1165 		sin6.sin6_family = AF_INET6;
1166 		sin6.sin6_len = sizeof(sin6);
1167 		sin6.sin6_addr = DR.rtaddr;
1168 		getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1169 		    sizeof(host_buf), NULL, 0,
1170 		    (nflag ? NI_NUMERICHOST : 0));
1171 
1172 		printf("%s if=%s", host_buf,
1173 		    if_indextoname(DR.if_index, ifix_buf));
1174 		printf(", flags=%s%s",
1175 		    DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1176 		    DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1177 		gettimeofday(&time, 0);
1178 		if (DR.expire == 0)
1179 			printf(", expire=Never\n");
1180 		else
1181 			printf(", expire=%s\n",
1182 			    sec2str(DR.expire - time.tv_sec));
1183 	}
1184 #undef DR
1185 	close(s);
1186 #endif
1187 }
1188 
1189 void
1190 plist()
1191 {
1192 #ifdef ICMPV6CTL_ND6_PRLIST
1193 	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1194 	char *buf;
1195 	struct in6_prefix *p, *ep, *n;
1196 	struct sockaddr_in6 *advrtr;
1197 	size_t l;
1198 	struct timeval time;
1199 	const int niflags = NI_NUMERICHOST;
1200 	int ninflags = nflag ? NI_NUMERICHOST : 0;
1201 	char namebuf[NI_MAXHOST];
1202 
1203 	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1204 		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1205 		/*NOTREACHED*/
1206 	}
1207 	buf = malloc(l);
1208 	if (!buf) {
1209 		err(1, "malloc");
1210 		/*NOTREACHED*/
1211 	}
1212 	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1213 		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1214 		/*NOTREACHED*/
1215 	}
1216 
1217 	ep = (struct in6_prefix *)(buf + l);
1218 	for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1219 		advrtr = (struct sockaddr_in6 *)(p + 1);
1220 		n = (struct in6_prefix *)&advrtr[p->advrtrs];
1221 
1222 		if (getnameinfo((struct sockaddr *)&p->prefix,
1223 		    p->prefix.sin6_len, namebuf, sizeof(namebuf),
1224 		    NULL, 0, niflags) != 0)
1225 			strlcpy(namebuf, "?", sizeof(namebuf));
1226 		printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1227 		    if_indextoname(p->if_index, ifix_buf));
1228 
1229 		gettimeofday(&time, 0);
1230 		/*
1231 		 * meaning of fields, especially flags, is very different
1232 		 * by origin.  notify the difference to the users.
1233 		 */
1234 		printf("flags=%s%s%s%s%s",
1235 		    p->raflags.onlink ? "L" : "",
1236 		    p->raflags.autonomous ? "A" : "",
1237 		    (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1238 		    (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1239 #ifdef NDPRF_HOME
1240 		    (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1241 #else
1242 		    ""
1243 #endif
1244 		    );
1245 		if (p->vltime == ND6_INFINITE_LIFETIME)
1246 			printf(" vltime=infinity");
1247 		else
1248 			printf(" vltime=%lu", (unsigned long)p->vltime);
1249 		if (p->pltime == ND6_INFINITE_LIFETIME)
1250 			printf(", pltime=infinity");
1251 		else
1252 			printf(", pltime=%lu", (unsigned long)p->pltime);
1253 		if (p->expire == 0)
1254 			printf(", expire=Never");
1255 		else if (p->expire >= time.tv_sec)
1256 			printf(", expire=%s",
1257 			    sec2str(p->expire - time.tv_sec));
1258 		else
1259 			printf(", expired");
1260 		printf(", ref=%d", p->refcnt);
1261 		printf("\n");
1262 		/*
1263 		 * "advertising router" list is meaningful only if the prefix
1264 		 * information is from RA.
1265 		 */
1266 		if (p->advrtrs) {
1267 			int j;
1268 			struct sockaddr_in6 *sin6;
1269 
1270 			sin6 = advrtr;
1271 			printf("  advertised by\n");
1272 			for (j = 0; j < p->advrtrs; j++) {
1273 				struct in6_nbrinfo *nbi;
1274 
1275 				if (getnameinfo((struct sockaddr *)sin6,
1276 				    sin6->sin6_len, namebuf, sizeof(namebuf),
1277 				    NULL, 0, ninflags) != 0)
1278 					strlcpy(namebuf, "?", sizeof(namebuf));
1279 				printf("    %s", namebuf);
1280 
1281 				nbi = getnbrinfo(&sin6->sin6_addr,
1282 				    p->if_index, 0);
1283 				if (nbi) {
1284 					switch (nbi->state) {
1285 					case ND6_LLINFO_REACHABLE:
1286 					case ND6_LLINFO_STALE:
1287 					case ND6_LLINFO_DELAY:
1288 					case ND6_LLINFO_PROBE:
1289 						printf(" (reachable)\n");
1290 						break;
1291 					default:
1292 						printf(" (unreachable)\n");
1293 					}
1294 				} else
1295 					printf(" (no neighbor state)\n");
1296 				sin6++;
1297 			}
1298 		} else
1299 			printf("  No advertising router\n");
1300 	}
1301 	free(buf);
1302 #else
1303 	struct in6_prlist pr;
1304 	int s, i;
1305 	struct timeval time;
1306 
1307 	gettimeofday(&time, 0);
1308 
1309 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1310 		err(1, "socket");
1311 		/* NOTREACHED */
1312 	}
1313 	bzero(&pr, sizeof(pr));
1314 	strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1315 	if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1316 		err(1, "ioctl(SIOCGPRLST_IN6)");
1317 		/* NOTREACHED */
1318 	}
1319 #define PR pr.prefix[i]
1320 	for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1321 		struct sockaddr_in6 p6;
1322 		char namebuf[NI_MAXHOST];
1323 		int niflags;
1324 
1325 #ifdef NDPRF_ONLINK
1326 		p6 = PR.prefix;
1327 #else
1328 		memset(&p6, 0, sizeof(p6));
1329 		p6.sin6_family = AF_INET6;
1330 		p6.sin6_len = sizeof(p6);
1331 		p6.sin6_addr = PR.prefix;
1332 #endif
1333 
1334 		/*
1335 		 * copy link index to sin6_scope_id field.
1336 		 * XXX: KAME specific.
1337 		 */
1338 		if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1339 			u_int16_t linkid;
1340 
1341 			memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1342 			    sizeof(linkid));
1343 			linkid = ntohs(linkid);
1344 			p6.sin6_scope_id = linkid;
1345 			p6.sin6_addr.s6_addr[2] = 0;
1346 			p6.sin6_addr.s6_addr[3] = 0;
1347 		}
1348 
1349 		niflags = NI_NUMERICHOST;
1350 		if (getnameinfo((struct sockaddr *)&p6,
1351 		    sizeof(p6), namebuf, sizeof(namebuf),
1352 		    NULL, 0, niflags)) {
1353 			warnx("getnameinfo failed");
1354 			continue;
1355 		}
1356 		printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1357 		    if_indextoname(PR.if_index, ifix_buf));
1358 
1359 		gettimeofday(&time, 0);
1360 		/*
1361 		 * meaning of fields, especially flags, is very different
1362 		 * by origin.  notify the difference to the users.
1363 		 */
1364 #if 0
1365 		printf("  %s",
1366 		    PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1367 #endif
1368 #ifdef NDPRF_ONLINK
1369 		printf("flags=%s%s%s%s%s",
1370 		    PR.raflags.onlink ? "L" : "",
1371 		    PR.raflags.autonomous ? "A" : "",
1372 		    (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1373 		    (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1374 #ifdef NDPRF_HOME
1375 		    (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1376 #else
1377 		    ""
1378 #endif
1379 		    );
1380 #else
1381 		printf("flags=%s%s",
1382 		    PR.raflags.onlink ? "L" : "",
1383 		    PR.raflags.autonomous ? "A" : "");
1384 #endif
1385 		if (PR.vltime == ND6_INFINITE_LIFETIME)
1386 			printf(" vltime=infinity");
1387 		else
1388 			printf(" vltime=%lu", PR.vltime);
1389 		if (PR.pltime == ND6_INFINITE_LIFETIME)
1390 			printf(", pltime=infinity");
1391 		else
1392 			printf(", pltime=%lu", PR.pltime);
1393 		if (PR.expire == 0)
1394 			printf(", expire=Never");
1395 		else if (PR.expire >= time.tv_sec)
1396 			printf(", expire=%s",
1397 			    sec2str(PR.expire - time.tv_sec));
1398 		else
1399 			printf(", expired");
1400 #ifdef NDPRF_ONLINK
1401 		printf(", ref=%d", PR.refcnt);
1402 #endif
1403 #if 0
1404 		switch (PR.origin) {
1405 		case PR_ORIG_RA:
1406 			printf(", origin=RA");
1407 			break;
1408 		case PR_ORIG_RR:
1409 			printf(", origin=RR");
1410 			break;
1411 		case PR_ORIG_STATIC:
1412 			printf(", origin=static");
1413 			break;
1414 		case PR_ORIG_KERNEL:
1415 			printf(", origin=kernel");
1416 			break;
1417 		default:
1418 			printf(", origin=?");
1419 			break;
1420 		}
1421 #endif
1422 		printf("\n");
1423 		/*
1424 		 * "advertising router" list is meaningful only if the prefix
1425 		 * information is from RA.
1426 		 */
1427 		if (0 &&	/* prefix origin is almost obsolted */
1428 		    PR.origin != PR_ORIG_RA)
1429 			;
1430 		else if (PR.advrtrs) {
1431 			int j;
1432 			printf("  advertised by\n");
1433 			for (j = 0; j < PR.advrtrs; j++) {
1434 				struct sockaddr_in6 sin6;
1435 				struct in6_nbrinfo *nbi;
1436 
1437 				bzero(&sin6, sizeof(sin6));
1438 				sin6.sin6_family = AF_INET6;
1439 				sin6.sin6_len = sizeof(sin6);
1440 				sin6.sin6_addr = PR.advrtr[j];
1441 				sin6.sin6_scope_id = PR.if_index; /* XXX */
1442 				getnameinfo((struct sockaddr *)&sin6,
1443 				    sin6.sin6_len, host_buf,
1444 				    sizeof(host_buf), NULL, 0,
1445 				    (nflag ? NI_NUMERICHOST : 0));
1446 				printf("    %s", host_buf);
1447 
1448 				nbi = getnbrinfo(&sin6.sin6_addr,
1449 				    PR.if_index, 0);
1450 				if (nbi) {
1451 					switch (nbi->state) {
1452 					case ND6_LLINFO_REACHABLE:
1453 					case ND6_LLINFO_STALE:
1454 					case ND6_LLINFO_DELAY:
1455 					case ND6_LLINFO_PROBE:
1456 						 printf(" (reachable)\n");
1457 						 break;
1458 					default:
1459 						 printf(" (unreachable)\n");
1460 					}
1461 				} else
1462 					printf(" (no neighbor state)\n");
1463 			}
1464 			if (PR.advrtrs > DRLSTSIZ)
1465 				printf("    and %d routers\n",
1466 				    PR.advrtrs - DRLSTSIZ);
1467 		} else
1468 			printf("  No advertising router\n");
1469 	}
1470 #undef PR
1471 	close(s);
1472 #endif
1473 }
1474 
1475 void
1476 pfx_flush()
1477 {
1478 	char dummyif[IFNAMSIZ+8];
1479 	int s;
1480 
1481 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1482 		err(1, "socket");
1483 	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1484 	if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1485 		err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1486 }
1487 
1488 void
1489 rtr_flush()
1490 {
1491 	char dummyif[IFNAMSIZ+8];
1492 	int s;
1493 
1494 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1495 		err(1, "socket");
1496 	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1497 	if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1498 		err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1499 
1500 	close(s);
1501 }
1502 
1503 void
1504 harmonize_rtr()
1505 {
1506 	char dummyif[IFNAMSIZ+8];
1507 	int s;
1508 
1509 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1510 		err(1, "socket");
1511 	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1512 	if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1513 		err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1514 
1515 	close(s);
1516 }
1517 
1518 #ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
1519 static void
1520 setdefif(ifname)
1521 	char *ifname;
1522 {
1523 	struct in6_ndifreq ndifreq;
1524 	unsigned int ifindex;
1525 
1526 	if (strcasecmp(ifname, "delete") == 0)
1527 		ifindex = 0;
1528 	else {
1529 		if ((ifindex = if_nametoindex(ifname)) == 0)
1530 			err(1, "failed to resolve i/f index for %s", ifname);
1531 	}
1532 
1533 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1534 		err(1, "socket");
1535 
1536 	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1537 	ndifreq.ifindex = ifindex;
1538 
1539 	if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1540 		err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1541 
1542 	close(s);
1543 }
1544 
1545 static void
1546 getdefif()
1547 {
1548 	struct in6_ndifreq ndifreq;
1549 	char ifname[IFNAMSIZ+8];
1550 
1551 	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1552 		err(1, "socket");
1553 
1554 	memset(&ndifreq, 0, sizeof(ndifreq));
1555 	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1556 
1557 	if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1558 		err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1559 
1560 	if (ndifreq.ifindex == 0)
1561 		printf("No default interface.\n");
1562 	else {
1563 		if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1564 			err(1, "failed to resolve ifname for index %lu",
1565 			    ndifreq.ifindex);
1566 		printf("ND default interface = %s\n", ifname);
1567 	}
1568 
1569 	close(s);
1570 }
1571 #endif
1572 
1573 static char *
1574 sec2str(total)
1575 	time_t total;
1576 {
1577 	static char result[256];
1578 	int days, hours, mins, secs;
1579 	int first = 1;
1580 	char *p = result;
1581 	char *ep = &result[sizeof(result)];
1582 	int n;
1583 
1584 	days = total / 3600 / 24;
1585 	hours = (total / 3600) % 24;
1586 	mins = (total / 60) % 60;
1587 	secs = total % 60;
1588 
1589 	if (days) {
1590 		first = 0;
1591 		n = snprintf(p, ep - p, "%dd", days);
1592 		if (n < 0 || n >= ep - p)
1593 			return "?";
1594 		p += n;
1595 	}
1596 	if (!first || hours) {
1597 		first = 0;
1598 		n = snprintf(p, ep - p, "%dh", hours);
1599 		if (n < 0 || n >= ep - p)
1600 			return "?";
1601 		p += n;
1602 	}
1603 	if (!first || mins) {
1604 		first = 0;
1605 		n = snprintf(p, ep - p, "%dm", mins);
1606 		if (n < 0 || n >= ep - p)
1607 			return "?";
1608 		p += n;
1609 	}
1610 	snprintf(p, ep - p, "%ds", secs);
1611 
1612 	return(result);
1613 }
1614 
1615 /*
1616  * Print the timestamp
1617  * from tcpdump/util.c
1618  */
1619 static void
1620 ts_print(tvp)
1621 	const struct timeval *tvp;
1622 {
1623 	int s;
1624 
1625 	/* Default */
1626 	s = (tvp->tv_sec + thiszone) % 86400;
1627 	(void)printf("%02d:%02d:%02d.%06u ",
1628 	    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1629 }
1630 
1631 #undef NEXTADDR
1632