ndp.c revision 186119 
1/*	$FreeBSD: head/usr.sbin/ndp/ndp.c 186119 2008-12-15 06:10:57Z qingli $	*/
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
122static pid_t pid;
123static int nflag;
124static int tflag;
125static int32_t thiszone;	/* time difference with gmt */
126static int s = -1;
127static int repeat = 0;
128
129char ntop_buf[INET6_ADDRSTRLEN];	/* inet_ntop() */
130char host_buf[NI_MAXHOST];		/* getnameinfo() */
131char ifix_buf[IFNAMSIZ];		/* if_indextoname() */
132
133int main(int, char **);
134int file(char *);
135void getsocket(void);
136int set(int, char **);
137void get(char *);
138int delete(char *);
139void dump(struct in6_addr *, int);
140static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
141static char *ether_str(struct sockaddr_dl *);
142int ndp_ether_aton(char *, u_char *);
143void usage(void);
144int rtmsg(int);
145void ifinfo(char *, int, char **);
146void rtrlist(void);
147void plist(void);
148void pfx_flush(void);
149void rtr_flush(void);
150void harmonize_rtr(void);
151#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
152static void getdefif(void);
153static void setdefif(char *);
154#endif
155static char *sec2str(time_t);
156static char *ether_str(struct sockaddr_dl *);
157static void ts_print(const struct timeval *);
158
159#ifdef ICMPV6CTL_ND6_DRLIST
160static char *rtpref_str[] = {
161	"medium",		/* 00 */
162	"high",			/* 01 */
163	"rsv",			/* 10 */
164	"low"			/* 11 */
165};
166#endif
167
168int mode = 0;
169char *arg = NULL;
170
171int
172main(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 */
323int
324file(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
356void
357getsocket()
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
368struct	sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
369struct	sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
370struct	sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
371int	expire_time, flags, found_entry;
372struct	{
373	struct	rt_msghdr m_rtm;
374	char	m_space[512];
375}	m_rtmsg;
376
377/*
378 * Set an individual neighbor cache entry
379 */
380int
381set(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
450overwrite:
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 */
463void
464get(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 */
500int
501delete(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
547delete:
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	if (rtmsg(RTM_DELETE) == 0) {
558		struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
559
560#ifdef __KAME__
561		if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
562			s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
563			*(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
564		}
565#endif
566		getnameinfo((struct sockaddr *)&s6,
567		    s6.sin6_len, host_buf,
568		    sizeof(host_buf), NULL, 0,
569		    (nflag ? NI_NUMERICHOST : 0));
570		printf("%s (%s) deleted\n", host, host_buf);
571	}
572
573	return 0;
574}
575
576#define W_ADDR	36
577#define W_LL	17
578#define W_IF	6
579
580/*
581 * Dump the entire neighbor cache
582 */
583void
584dump(addr, cflag)
585	struct in6_addr *addr;
586	int cflag;
587{
588	int mib[6];
589	size_t needed;
590	char *lim, *buf, *next;
591	struct rt_msghdr *rtm;
592	struct sockaddr_in6 *sin;
593	struct sockaddr_dl *sdl;
594	extern int h_errno;
595	struct in6_nbrinfo *nbi;
596	struct timeval time;
597	int addrwidth;
598	int llwidth;
599	int ifwidth;
600	char flgbuf[8];
601	char *ifname;
602
603	/* Print header */
604	if (!tflag && !cflag)
605		printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
606		    W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
607		    W_IF, W_IF, "Netif", "Expire", "S", "Flags");
608
609again:;
610	mib[0] = CTL_NET;
611	mib[1] = PF_ROUTE;
612	mib[2] = 0;
613	mib[3] = AF_INET6;
614	mib[4] = NET_RT_FLAGS;
615#ifdef RTF_LLINFO
616	mib[5] = RTF_LLINFO;
617#else
618	mib[5] = 0;
619#endif
620	if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
621		err(1, "sysctl(PF_ROUTE estimate)");
622	if (needed > 0) {
623		if ((buf = malloc(needed)) == NULL)
624			err(1, "malloc");
625		if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
626			err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
627		lim = buf + needed;
628	} else
629		buf = lim = NULL;
630
631	for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
632		int isrouter = 0, prbs = 0;
633
634		rtm = (struct rt_msghdr *)next;
635		sin = (struct sockaddr_in6 *)(rtm + 1);
636		sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
637
638		/*
639		 * Some OSes can produce a route that has the LINK flag but
640		 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
641		 * and BSD/OS, where xx is not the interface identifier on
642		 * lo0).  Such routes entry would annoy getnbrinfo() below,
643		 * so we skip them.
644		 * XXX: such routes should have the GATEWAY flag, not the
645		 * LINK flag.  However, there is rotten routing software
646		 * that advertises all routes that have the GATEWAY flag.
647		 * Thus, KAME kernel intentionally does not set the LINK flag.
648		 * What is to be fixed is not ndp, but such routing software
649		 * (and the kernel workaround)...
650		 */
651		if (sdl->sdl_family != AF_LINK)
652			continue;
653
654		if (!(rtm->rtm_flags & RTF_HOST))
655			continue;
656
657		if (addr) {
658			if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
659				continue;
660			found_entry = 1;
661		} else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
662			continue;
663		if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
664		    IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
665			/* XXX: should scope id be filled in the kernel? */
666			if (sin->sin6_scope_id == 0)
667				sin->sin6_scope_id = sdl->sdl_index;
668#ifdef __KAME__
669			/* KAME specific hack; removed the embedded id */
670			*(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
671#endif
672		}
673		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
674		    sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
675		if (cflag) {
676#ifdef RTF_WASCLONED
677			if (rtm->rtm_flags & RTF_WASCLONED)
678				delete(host_buf);
679#elif defined(RTF_CLONED)
680			if (rtm->rtm_flags & RTF_CLONED)
681				delete(host_buf);
682#else
683			delete(host_buf);
684#endif
685			continue;
686		}
687		gettimeofday(&time, 0);
688		if (tflag)
689			ts_print(&time);
690
691		addrwidth = strlen(host_buf);
692		if (addrwidth < W_ADDR)
693			addrwidth = W_ADDR;
694		llwidth = strlen(ether_str(sdl));
695		if (W_ADDR + W_LL - addrwidth > llwidth)
696			llwidth = W_ADDR + W_LL - addrwidth;
697		ifname = if_indextoname(sdl->sdl_index, ifix_buf);
698		if (!ifname)
699			ifname = "?";
700		ifwidth = strlen(ifname);
701		if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
702			ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
703
704		printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
705		    llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
706
707		/* Print neighbor discovery specific informations */
708		nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
709		if (nbi) {
710			if (nbi->expire > time.tv_sec) {
711				printf(" %-9.9s",
712				    sec2str(nbi->expire - time.tv_sec));
713			} else if (nbi->expire == 0)
714				printf(" %-9.9s", "permanent");
715			else
716				printf(" %-9.9s", "expired");
717
718			switch (nbi->state) {
719			case ND6_LLINFO_NOSTATE:
720				 printf(" N");
721				 break;
722#ifdef ND6_LLINFO_WAITDELETE
723			case ND6_LLINFO_WAITDELETE:
724				 printf(" W");
725				 break;
726#endif
727			case ND6_LLINFO_INCOMPLETE:
728				 printf(" I");
729				 break;
730			case ND6_LLINFO_REACHABLE:
731				 printf(" R");
732				 break;
733			case ND6_LLINFO_STALE:
734				 printf(" S");
735				 break;
736			case ND6_LLINFO_DELAY:
737				 printf(" D");
738				 break;
739			case ND6_LLINFO_PROBE:
740				 printf(" P");
741				 break;
742			default:
743				 printf(" ?");
744				 break;
745			}
746
747			isrouter = nbi->isrouter;
748			prbs = nbi->asked;
749		} else {
750			warnx("failed to get neighbor information");
751			printf("  ");
752		}
753
754		/*
755		 * other flags. R: router, P: proxy, W: ??
756		 */
757		if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
758			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
759			    isrouter ? "R" : "",
760			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
761		} else {
762			sin = (struct sockaddr_in6 *)
763			    (sdl->sdl_len + (char *)sdl);
764#if 0	/* W and P are mystery even for us */
765			snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
766			    isrouter ? "R" : "",
767			    !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
768			    (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
769			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
770#else
771			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
772			    isrouter ? "R" : "",
773			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
774#endif
775		}
776		printf(" %s", flgbuf);
777
778		if (prbs)
779			printf(" %d", prbs);
780
781		printf("\n");
782	}
783	if (buf != NULL)
784		free(buf);
785
786	if (repeat) {
787		printf("\n");
788		fflush(stdout);
789		sleep(repeat);
790		goto again;
791	}
792}
793
794static struct in6_nbrinfo *
795getnbrinfo(addr, ifindex, warning)
796	struct in6_addr *addr;
797	int ifindex;
798	int warning;
799{
800	static struct in6_nbrinfo nbi;
801	int s;
802
803	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
804		err(1, "socket");
805
806	bzero(&nbi, sizeof(nbi));
807	if_indextoname(ifindex, nbi.ifname);
808	nbi.addr = *addr;
809	if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
810		if (warning)
811			warn("ioctl(SIOCGNBRINFO_IN6)");
812		close(s);
813		return(NULL);
814	}
815
816	close(s);
817	return(&nbi);
818}
819
820static char *
821ether_str(sdl)
822	struct sockaddr_dl *sdl;
823{
824	static char hbuf[NI_MAXHOST];
825	u_char *cp;
826
827	if (sdl->sdl_alen) {
828		cp = (u_char *)LLADDR(sdl);
829		snprintf(hbuf, sizeof(hbuf), "%x:%x:%x:%x:%x:%x",
830		    cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
831	} else
832		snprintf(hbuf, sizeof(hbuf), "(incomplete)");
833
834	return(hbuf);
835}
836
837int
838ndp_ether_aton(a, n)
839	char *a;
840	u_char *n;
841{
842	int i, o[6];
843
844	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
845	    &o[3], &o[4], &o[5]);
846	if (i != 6) {
847		fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
848		return (1);
849	}
850	for (i = 0; i < 6; i++)
851		n[i] = o[i];
852	return (0);
853}
854
855void
856usage()
857{
858	printf("usage: ndp [-nt] hostname\n");
859	printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
860	printf("       ndp [-nt] -A wait\n");
861	printf("       ndp [-nt] -d hostname\n");
862	printf("       ndp [-nt] -f filename\n");
863	printf("       ndp [-nt] -i interface [flags...]\n");
864#ifdef SIOCSDEFIFACE_IN6
865	printf("       ndp [-nt] -I [interface|delete]\n");
866#endif
867	printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
868	exit(1);
869}
870
871int
872rtmsg(cmd)
873	int cmd;
874{
875	static int seq;
876	int rlen;
877	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
878	register char *cp = m_rtmsg.m_space;
879	register int l;
880
881	errno = 0;
882	if (cmd == RTM_DELETE)
883		goto doit;
884	bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
885	rtm->rtm_flags = flags;
886	rtm->rtm_version = RTM_VERSION;
887
888	switch (cmd) {
889	default:
890		fprintf(stderr, "ndp: internal wrong cmd\n");
891		exit(1);
892	case RTM_ADD:
893		rtm->rtm_addrs |= RTA_GATEWAY;
894		if (expire_time) {
895			rtm->rtm_rmx.rmx_expire = expire_time;
896			rtm->rtm_inits = RTV_EXPIRE;
897		}
898		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
899#if 0 /* we don't support ipv6addr/128 type proxying */
900		if (rtm->rtm_flags & RTF_ANNOUNCE) {
901			rtm->rtm_flags &= ~RTF_HOST;
902			rtm->rtm_addrs |= RTA_NETMASK;
903		}
904#endif
905		/* FALLTHROUGH */
906	case RTM_GET:
907		rtm->rtm_addrs |= RTA_DST;
908	}
909
910	NEXTADDR(RTA_DST, sin_m);
911	NEXTADDR(RTA_GATEWAY, sdl_m);
912#if 0 /* we don't support ipv6addr/128 type proxying */
913	memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
914	NEXTADDR(RTA_NETMASK, so_mask);
915#endif
916
917	rtm->rtm_msglen = cp - (char *)&m_rtmsg;
918doit:
919	l = rtm->rtm_msglen;
920	rtm->rtm_seq = ++seq;
921	rtm->rtm_type = cmd;
922	if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
923		if (errno != ESRCH || cmd != RTM_DELETE) {
924			err(1, "writing to routing socket");
925			/* NOTREACHED */
926		}
927	}
928	do {
929		l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
930	} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
931	if (l < 0)
932		(void) fprintf(stderr, "ndp: read from routing socket: %s\n",
933		    strerror(errno));
934	return (0);
935}
936
937void
938ifinfo(ifname, argc, argv)
939	char *ifname;
940	int argc;
941	char **argv;
942{
943	struct in6_ndireq nd;
944	int i, s;
945	u_int32_t newflags;
946#ifdef IPV6CTL_USETEMPADDR
947	u_int8_t nullbuf[8];
948#endif
949
950	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
951		err(1, "socket");
952		/* NOTREACHED */
953	}
954	bzero(&nd, sizeof(nd));
955	strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
956	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
957		err(1, "ioctl(SIOCGIFINFO_IN6)");
958		/* NOTREACHED */
959	}
960#define ND nd.ndi
961	newflags = ND.flags;
962	for (i = 0; i < argc; i++) {
963		int clear = 0;
964		char *cp = argv[i];
965
966		if (*cp == '-') {
967			clear = 1;
968			cp++;
969		}
970
971#define SETFLAG(s, f) \
972	do {\
973		if (strcmp(cp, (s)) == 0) {\
974			if (clear)\
975				newflags &= ~(f);\
976			else\
977				newflags |= (f);\
978		}\
979	} while (0)
980/*
981 * XXX: this macro is not 100% correct, in that it matches "nud" against
982 *      "nudbogus".  But we just let it go since this is minor.
983 */
984#define SETVALUE(f, v) \
985	do { \
986		char *valptr; \
987		unsigned long newval; \
988		v = 0; /* unspecified */ \
989		if (strncmp(cp, f, strlen(f)) == 0) { \
990			valptr = strchr(cp, '='); \
991			if (valptr == NULL) \
992				err(1, "syntax error in %s field", (f)); \
993			errno = 0; \
994			newval = strtoul(++valptr, NULL, 0); \
995			if (errno) \
996				err(1, "syntax error in %s's value", (f)); \
997			v = newval; \
998		} \
999	} while (0)
1000
1001		SETFLAG("disabled", ND6_IFF_IFDISABLED);
1002		SETFLAG("nud", ND6_IFF_PERFORMNUD);
1003#ifdef ND6_IFF_ACCEPT_RTADV
1004		SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
1005#endif
1006#ifdef ND6_IFF_PREFER_SOURCE
1007		SETFLAG("prefer_source", ND6_IFF_PREFER_SOURCE);
1008#endif
1009		SETVALUE("basereachable", ND.basereachable);
1010		SETVALUE("retrans", ND.retrans);
1011		SETVALUE("curhlim", ND.chlim);
1012
1013		ND.flags = newflags;
1014		if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
1015			err(1, "ioctl(SIOCSIFINFO_IN6)");
1016			/* NOTREACHED */
1017		}
1018#undef SETFLAG
1019#undef SETVALUE
1020	}
1021
1022	if (!ND.initialized) {
1023		errx(1, "%s: not initialized yet", ifname);
1024		/* NOTREACHED */
1025	}
1026
1027	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1028		err(1, "ioctl(SIOCGIFINFO_IN6)");
1029		/* NOTREACHED */
1030	}
1031	printf("linkmtu=%d", ND.linkmtu);
1032	printf(", maxmtu=%d", ND.maxmtu);
1033	printf(", curhlim=%d", ND.chlim);
1034	printf(", basereachable=%ds%dms",
1035	    ND.basereachable / 1000, ND.basereachable % 1000);
1036	printf(", reachable=%ds", ND.reachable);
1037	printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
1038#ifdef IPV6CTL_USETEMPADDR
1039	memset(nullbuf, 0, sizeof(nullbuf));
1040	if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1041		int j;
1042		u_int8_t *rbuf;
1043
1044		for (i = 0; i < 3; i++) {
1045			switch (i) {
1046			case 0:
1047				printf("\nRandom seed(0): ");
1048				rbuf = ND.randomseed0;
1049				break;
1050			case 1:
1051				printf("\nRandom seed(1): ");
1052				rbuf = ND.randomseed1;
1053				break;
1054			case 2:
1055				printf("\nRandom ID:      ");
1056				rbuf = ND.randomid;
1057				break;
1058			default:
1059				errx(1, "impossible case for tempaddr display");
1060			}
1061			for (j = 0; j < 8; j++)
1062				printf("%02x", rbuf[j]);
1063		}
1064	}
1065#endif
1066	if (ND.flags) {
1067		printf("\nFlags: ");
1068#ifdef ND6_IFF_IFDISABLED
1069		if ((ND.flags & ND6_IFF_IFDISABLED))
1070			printf("disabled ");
1071#endif
1072		if ((ND.flags & ND6_IFF_PERFORMNUD))
1073			printf("nud ");
1074#ifdef ND6_IFF_ACCEPT_RTADV
1075		if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1076			printf("accept_rtadv ");
1077#endif
1078#ifdef ND6_IFF_PREFER_SOURCE
1079		if ((ND.flags & ND6_IFF_PREFER_SOURCE))
1080			printf("prefer_source ");
1081#endif
1082	}
1083	putc('\n', stdout);
1084#undef ND
1085
1086	close(s);
1087}
1088
1089#ifndef ND_RA_FLAG_RTPREF_MASK	/* XXX: just for compilation on *BSD release */
1090#define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
1091#endif
1092
1093void
1094rtrlist()
1095{
1096#ifdef ICMPV6CTL_ND6_DRLIST
1097	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1098	char *buf;
1099	struct in6_defrouter *p, *ep;
1100	size_t l;
1101	struct timeval time;
1102
1103	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1104		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1105		/*NOTREACHED*/
1106	}
1107	if (l == 0)
1108		return;
1109	buf = malloc(l);
1110	if (!buf) {
1111		err(1, "malloc");
1112		/*NOTREACHED*/
1113	}
1114	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1115		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1116		/*NOTREACHED*/
1117	}
1118
1119	ep = (struct in6_defrouter *)(buf + l);
1120	for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1121		int rtpref;
1122
1123		if (getnameinfo((struct sockaddr *)&p->rtaddr,
1124		    p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1125		    (nflag ? NI_NUMERICHOST : 0)) != 0)
1126			strlcpy(host_buf, "?", sizeof(host_buf));
1127
1128		printf("%s if=%s", host_buf,
1129		    if_indextoname(p->if_index, ifix_buf));
1130		printf(", flags=%s%s",
1131		    p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1132		    p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1133		rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1134		printf(", pref=%s", rtpref_str[rtpref]);
1135
1136		gettimeofday(&time, 0);
1137		if (p->expire == 0)
1138			printf(", expire=Never\n");
1139		else
1140			printf(", expire=%s\n",
1141			    sec2str(p->expire - time.tv_sec));
1142	}
1143	free(buf);
1144#else
1145	struct in6_drlist dr;
1146	int s, i;
1147	struct timeval time;
1148
1149	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1150		err(1, "socket");
1151		/* NOTREACHED */
1152	}
1153	bzero(&dr, sizeof(dr));
1154	strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1155	if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1156		err(1, "ioctl(SIOCGDRLST_IN6)");
1157		/* NOTREACHED */
1158	}
1159#define DR dr.defrouter[i]
1160	for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1161		struct sockaddr_in6 sin6;
1162
1163		bzero(&sin6, sizeof(sin6));
1164		sin6.sin6_family = AF_INET6;
1165		sin6.sin6_len = sizeof(sin6);
1166		sin6.sin6_addr = DR.rtaddr;
1167		getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1168		    sizeof(host_buf), NULL, 0,
1169		    (nflag ? NI_NUMERICHOST : 0));
1170
1171		printf("%s if=%s", host_buf,
1172		    if_indextoname(DR.if_index, ifix_buf));
1173		printf(", flags=%s%s",
1174		    DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1175		    DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1176		gettimeofday(&time, 0);
1177		if (DR.expire == 0)
1178			printf(", expire=Never\n");
1179		else
1180			printf(", expire=%s\n",
1181			    sec2str(DR.expire - time.tv_sec));
1182	}
1183#undef DR
1184	close(s);
1185#endif
1186}
1187
1188void
1189plist()
1190{
1191#ifdef ICMPV6CTL_ND6_PRLIST
1192	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1193	char *buf;
1194	struct in6_prefix *p, *ep, *n;
1195	struct sockaddr_in6 *advrtr;
1196	size_t l;
1197	struct timeval time;
1198	const int niflags = NI_NUMERICHOST;
1199	int ninflags = nflag ? NI_NUMERICHOST : 0;
1200	char namebuf[NI_MAXHOST];
1201
1202	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1203		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1204		/*NOTREACHED*/
1205	}
1206	buf = malloc(l);
1207	if (!buf) {
1208		err(1, "malloc");
1209		/*NOTREACHED*/
1210	}
1211	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1212		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1213		/*NOTREACHED*/
1214	}
1215
1216	ep = (struct in6_prefix *)(buf + l);
1217	for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1218		advrtr = (struct sockaddr_in6 *)(p + 1);
1219		n = (struct in6_prefix *)&advrtr[p->advrtrs];
1220
1221		if (getnameinfo((struct sockaddr *)&p->prefix,
1222		    p->prefix.sin6_len, namebuf, sizeof(namebuf),
1223		    NULL, 0, niflags) != 0)
1224			strlcpy(namebuf, "?", sizeof(namebuf));
1225		printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1226		    if_indextoname(p->if_index, ifix_buf));
1227
1228		gettimeofday(&time, 0);
1229		/*
1230		 * meaning of fields, especially flags, is very different
1231		 * by origin.  notify the difference to the users.
1232		 */
1233		printf("flags=%s%s%s%s%s",
1234		    p->raflags.onlink ? "L" : "",
1235		    p->raflags.autonomous ? "A" : "",
1236		    (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1237		    (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1238#ifdef NDPRF_HOME
1239		    (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1240#else
1241		    ""
1242#endif
1243		    );
1244		if (p->vltime == ND6_INFINITE_LIFETIME)
1245			printf(" vltime=infinity");
1246		else
1247			printf(" vltime=%lu", (unsigned long)p->vltime);
1248		if (p->pltime == ND6_INFINITE_LIFETIME)
1249			printf(", pltime=infinity");
1250		else
1251			printf(", pltime=%lu", (unsigned long)p->pltime);
1252		if (p->expire == 0)
1253			printf(", expire=Never");
1254		else if (p->expire >= time.tv_sec)
1255			printf(", expire=%s",
1256			    sec2str(p->expire - time.tv_sec));
1257		else
1258			printf(", expired");
1259		printf(", ref=%d", p->refcnt);
1260		printf("\n");
1261		/*
1262		 * "advertising router" list is meaningful only if the prefix
1263		 * information is from RA.
1264		 */
1265		if (p->advrtrs) {
1266			int j;
1267			struct sockaddr_in6 *sin6;
1268
1269			sin6 = advrtr;
1270			printf("  advertised by\n");
1271			for (j = 0; j < p->advrtrs; j++) {
1272				struct in6_nbrinfo *nbi;
1273
1274				if (getnameinfo((struct sockaddr *)sin6,
1275				    sin6->sin6_len, namebuf, sizeof(namebuf),
1276				    NULL, 0, ninflags) != 0)
1277					strlcpy(namebuf, "?", sizeof(namebuf));
1278				printf("    %s", namebuf);
1279
1280				nbi = getnbrinfo(&sin6->sin6_addr,
1281				    p->if_index, 0);
1282				if (nbi) {
1283					switch (nbi->state) {
1284					case ND6_LLINFO_REACHABLE:
1285					case ND6_LLINFO_STALE:
1286					case ND6_LLINFO_DELAY:
1287					case ND6_LLINFO_PROBE:
1288						printf(" (reachable)\n");
1289						break;
1290					default:
1291						printf(" (unreachable)\n");
1292					}
1293				} else
1294					printf(" (no neighbor state)\n");
1295				sin6++;
1296			}
1297		} else
1298			printf("  No advertising router\n");
1299	}
1300	free(buf);
1301#else
1302	struct in6_prlist pr;
1303	int s, i;
1304	struct timeval time;
1305
1306	gettimeofday(&time, 0);
1307
1308	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1309		err(1, "socket");
1310		/* NOTREACHED */
1311	}
1312	bzero(&pr, sizeof(pr));
1313	strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1314	if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1315		err(1, "ioctl(SIOCGPRLST_IN6)");
1316		/* NOTREACHED */
1317	}
1318#define PR pr.prefix[i]
1319	for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1320		struct sockaddr_in6 p6;
1321		char namebuf[NI_MAXHOST];
1322		int niflags;
1323
1324#ifdef NDPRF_ONLINK
1325		p6 = PR.prefix;
1326#else
1327		memset(&p6, 0, sizeof(p6));
1328		p6.sin6_family = AF_INET6;
1329		p6.sin6_len = sizeof(p6);
1330		p6.sin6_addr = PR.prefix;
1331#endif
1332
1333		/*
1334		 * copy link index to sin6_scope_id field.
1335		 * XXX: KAME specific.
1336		 */
1337		if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1338			u_int16_t linkid;
1339
1340			memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1341			    sizeof(linkid));
1342			linkid = ntohs(linkid);
1343			p6.sin6_scope_id = linkid;
1344			p6.sin6_addr.s6_addr[2] = 0;
1345			p6.sin6_addr.s6_addr[3] = 0;
1346		}
1347
1348		niflags = NI_NUMERICHOST;
1349		if (getnameinfo((struct sockaddr *)&p6,
1350		    sizeof(p6), namebuf, sizeof(namebuf),
1351		    NULL, 0, niflags)) {
1352			warnx("getnameinfo failed");
1353			continue;
1354		}
1355		printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1356		    if_indextoname(PR.if_index, ifix_buf));
1357
1358		gettimeofday(&time, 0);
1359		/*
1360		 * meaning of fields, especially flags, is very different
1361		 * by origin.  notify the difference to the users.
1362		 */
1363#if 0
1364		printf("  %s",
1365		    PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1366#endif
1367#ifdef NDPRF_ONLINK
1368		printf("flags=%s%s%s%s%s",
1369		    PR.raflags.onlink ? "L" : "",
1370		    PR.raflags.autonomous ? "A" : "",
1371		    (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1372		    (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1373#ifdef NDPRF_HOME
1374		    (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1375#else
1376		    ""
1377#endif
1378		    );
1379#else
1380		printf("flags=%s%s",
1381		    PR.raflags.onlink ? "L" : "",
1382		    PR.raflags.autonomous ? "A" : "");
1383#endif
1384		if (PR.vltime == ND6_INFINITE_LIFETIME)
1385			printf(" vltime=infinity");
1386		else
1387			printf(" vltime=%lu", PR.vltime);
1388		if (PR.pltime == ND6_INFINITE_LIFETIME)
1389			printf(", pltime=infinity");
1390		else
1391			printf(", pltime=%lu", PR.pltime);
1392		if (PR.expire == 0)
1393			printf(", expire=Never");
1394		else if (PR.expire >= time.tv_sec)
1395			printf(", expire=%s",
1396			    sec2str(PR.expire - time.tv_sec));
1397		else
1398			printf(", expired");
1399#ifdef NDPRF_ONLINK
1400		printf(", ref=%d", PR.refcnt);
1401#endif
1402#if 0
1403		switch (PR.origin) {
1404		case PR_ORIG_RA:
1405			printf(", origin=RA");
1406			break;
1407		case PR_ORIG_RR:
1408			printf(", origin=RR");
1409			break;
1410		case PR_ORIG_STATIC:
1411			printf(", origin=static");
1412			break;
1413		case PR_ORIG_KERNEL:
1414			printf(", origin=kernel");
1415			break;
1416		default:
1417			printf(", origin=?");
1418			break;
1419		}
1420#endif
1421		printf("\n");
1422		/*
1423		 * "advertising router" list is meaningful only if the prefix
1424		 * information is from RA.
1425		 */
1426		if (0 &&	/* prefix origin is almost obsolted */
1427		    PR.origin != PR_ORIG_RA)
1428			;
1429		else if (PR.advrtrs) {
1430			int j;
1431			printf("  advertised by\n");
1432			for (j = 0; j < PR.advrtrs; j++) {
1433				struct sockaddr_in6 sin6;
1434				struct in6_nbrinfo *nbi;
1435
1436				bzero(&sin6, sizeof(sin6));
1437				sin6.sin6_family = AF_INET6;
1438				sin6.sin6_len = sizeof(sin6);
1439				sin6.sin6_addr = PR.advrtr[j];
1440				sin6.sin6_scope_id = PR.if_index; /* XXX */
1441				getnameinfo((struct sockaddr *)&sin6,
1442				    sin6.sin6_len, host_buf,
1443				    sizeof(host_buf), NULL, 0,
1444				    (nflag ? NI_NUMERICHOST : 0));
1445				printf("    %s", host_buf);
1446
1447				nbi = getnbrinfo(&sin6.sin6_addr,
1448				    PR.if_index, 0);
1449				if (nbi) {
1450					switch (nbi->state) {
1451					case ND6_LLINFO_REACHABLE:
1452					case ND6_LLINFO_STALE:
1453					case ND6_LLINFO_DELAY:
1454					case ND6_LLINFO_PROBE:
1455						 printf(" (reachable)\n");
1456						 break;
1457					default:
1458						 printf(" (unreachable)\n");
1459					}
1460				} else
1461					printf(" (no neighbor state)\n");
1462			}
1463			if (PR.advrtrs > DRLSTSIZ)
1464				printf("    and %d routers\n",
1465				    PR.advrtrs - DRLSTSIZ);
1466		} else
1467			printf("  No advertising router\n");
1468	}
1469#undef PR
1470	close(s);
1471#endif
1472}
1473
1474void
1475pfx_flush()
1476{
1477	char dummyif[IFNAMSIZ+8];
1478	int s;
1479
1480	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1481		err(1, "socket");
1482	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1483	if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1484		err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1485}
1486
1487void
1488rtr_flush()
1489{
1490	char dummyif[IFNAMSIZ+8];
1491	int s;
1492
1493	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1494		err(1, "socket");
1495	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1496	if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1497		err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1498
1499	close(s);
1500}
1501
1502void
1503harmonize_rtr()
1504{
1505	char dummyif[IFNAMSIZ+8];
1506	int s;
1507
1508	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1509		err(1, "socket");
1510	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1511	if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1512		err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1513
1514	close(s);
1515}
1516
1517#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
1518static void
1519setdefif(ifname)
1520	char *ifname;
1521{
1522	struct in6_ndifreq ndifreq;
1523	unsigned int ifindex;
1524
1525	if (strcasecmp(ifname, "delete") == 0)
1526		ifindex = 0;
1527	else {
1528		if ((ifindex = if_nametoindex(ifname)) == 0)
1529			err(1, "failed to resolve i/f index for %s", ifname);
1530	}
1531
1532	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1533		err(1, "socket");
1534
1535	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1536	ndifreq.ifindex = ifindex;
1537
1538	if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1539		err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1540
1541	close(s);
1542}
1543
1544static void
1545getdefif()
1546{
1547	struct in6_ndifreq ndifreq;
1548	char ifname[IFNAMSIZ+8];
1549
1550	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1551		err(1, "socket");
1552
1553	memset(&ndifreq, 0, sizeof(ndifreq));
1554	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1555
1556	if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1557		err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1558
1559	if (ndifreq.ifindex == 0)
1560		printf("No default interface.\n");
1561	else {
1562		if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1563			err(1, "failed to resolve ifname for index %lu",
1564			    ndifreq.ifindex);
1565		printf("ND default interface = %s\n", ifname);
1566	}
1567
1568	close(s);
1569}
1570#endif
1571
1572static char *
1573sec2str(total)
1574	time_t total;
1575{
1576	static char result[256];
1577	int days, hours, mins, secs;
1578	int first = 1;
1579	char *p = result;
1580	char *ep = &result[sizeof(result)];
1581	int n;
1582
1583	days = total / 3600 / 24;
1584	hours = (total / 3600) % 24;
1585	mins = (total / 60) % 60;
1586	secs = total % 60;
1587
1588	if (days) {
1589		first = 0;
1590		n = snprintf(p, ep - p, "%dd", days);
1591		if (n < 0 || n >= ep - p)
1592			return "?";
1593		p += n;
1594	}
1595	if (!first || hours) {
1596		first = 0;
1597		n = snprintf(p, ep - p, "%dh", hours);
1598		if (n < 0 || n >= ep - p)
1599			return "?";
1600		p += n;
1601	}
1602	if (!first || mins) {
1603		first = 0;
1604		n = snprintf(p, ep - p, "%dm", mins);
1605		if (n < 0 || n >= ep - p)
1606			return "?";
1607		p += n;
1608	}
1609	snprintf(p, ep - p, "%ds", secs);
1610
1611	return(result);
1612}
1613
1614/*
1615 * Print the timestamp
1616 * from tcpdump/util.c
1617 */
1618static void
1619ts_print(tvp)
1620	const struct timeval *tvp;
1621{
1622	int s;
1623
1624	/* Default */
1625	s = (tvp->tv_sec + thiszone) % 86400;
1626	(void)printf("%02d:%02d:%02d.%06u ",
1627	    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1628}
1629
1630#undef NEXTADDR
1631