ndp.c revision 253999 
1/*	$FreeBSD: head/usr.sbin/ndp/ndp.c 253999 2013-08-06 17:10:52Z hrs $	*/
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 += SA_SIZE(&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 void ts_print(const struct timeval *);
157
158#ifdef ICMPV6CTL_ND6_DRLIST
159static char *rtpref_str[] = {
160	"medium",		/* 00 */
161	"high",			/* 01 */
162	"rsv",			/* 10 */
163	"low"			/* 11 */
164};
165#endif
166
167int mode = 0;
168char *arg = NULL;
169
170int
171main(argc, argv)
172	int argc;
173	char **argv;
174{
175	int ch;
176
177	pid = getpid();
178	thiszone = gmt2local(0);
179	while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
180		switch (ch) {
181		case 'a':
182		case 'c':
183		case 'p':
184		case 'r':
185		case 'H':
186		case 'P':
187		case 'R':
188		case 's':
189		case 'I':
190			if (mode) {
191				usage();
192				/*NOTREACHED*/
193			}
194			mode = ch;
195			arg = NULL;
196			break;
197		case 'd':
198		case 'f':
199		case 'i' :
200			if (mode) {
201				usage();
202				/*NOTREACHED*/
203			}
204			mode = ch;
205			arg = optarg;
206			break;
207		case 'n':
208			nflag = 1;
209			break;
210		case 't':
211			tflag = 1;
212			break;
213		case 'A':
214			if (mode) {
215				usage();
216				/*NOTREACHED*/
217			}
218			mode = 'a';
219			repeat = atoi(optarg);
220			if (repeat < 0) {
221				usage();
222				/*NOTREACHED*/
223			}
224			break;
225		default:
226			usage();
227		}
228
229	argc -= optind;
230	argv += optind;
231
232	switch (mode) {
233	case 'a':
234	case 'c':
235		if (argc != 0) {
236			usage();
237			/*NOTREACHED*/
238		}
239		dump(0, mode == 'c');
240		break;
241	case 'd':
242		if (argc != 0) {
243			usage();
244			/*NOTREACHED*/
245		}
246		delete(arg);
247		break;
248	case 'I':
249#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
250		if (argc > 1) {
251			usage();
252			/*NOTREACHED*/
253		} else if (argc == 1) {
254			if (strcmp(*argv, "delete") == 0 ||
255			    if_nametoindex(*argv))
256				setdefif(*argv);
257			else
258				errx(1, "invalid interface %s", *argv);
259		}
260		getdefif(); /* always call it to print the result */
261		break;
262#else
263		errx(1, "not supported yet");
264		/*NOTREACHED*/
265#endif
266	case 'p':
267		if (argc != 0) {
268			usage();
269			/*NOTREACHED*/
270		}
271		plist();
272		break;
273	case 'i':
274		ifinfo(arg, argc, argv);
275		break;
276	case 'r':
277		if (argc != 0) {
278			usage();
279			/*NOTREACHED*/
280		}
281		rtrlist();
282		break;
283	case 's':
284		if (argc < 2 || argc > 4)
285			usage();
286		exit(set(argc, argv) ? 1 : 0);
287	case 'H':
288		if (argc != 0) {
289			usage();
290			/*NOTREACHED*/
291		}
292		harmonize_rtr();
293		break;
294	case 'P':
295		if (argc != 0) {
296			usage();
297			/*NOTREACHED*/
298		}
299		pfx_flush();
300		break;
301	case 'R':
302		if (argc != 0) {
303			usage();
304			/*NOTREACHED*/
305		}
306		rtr_flush();
307		break;
308	case 0:
309		if (argc != 1) {
310			usage();
311			/*NOTREACHED*/
312		}
313		get(argv[0]);
314		break;
315	}
316	exit(0);
317}
318
319/*
320 * Process a file to set standard ndp entries
321 */
322int
323file(name)
324	char *name;
325{
326	FILE *fp;
327	int i, retval;
328	char line[100], arg[5][50], *args[5];
329
330	if ((fp = fopen(name, "r")) == NULL) {
331		fprintf(stderr, "ndp: cannot open %s\n", name);
332		exit(1);
333	}
334	args[0] = &arg[0][0];
335	args[1] = &arg[1][0];
336	args[2] = &arg[2][0];
337	args[3] = &arg[3][0];
338	args[4] = &arg[4][0];
339	retval = 0;
340	while (fgets(line, sizeof(line), fp) != NULL) {
341		i = sscanf(line, "%49s %49s %49s %49s %49s",
342		    arg[0], arg[1], arg[2], arg[3], arg[4]);
343		if (i < 2) {
344			fprintf(stderr, "ndp: bad line: %s\n", line);
345			retval = 1;
346			continue;
347		}
348		if (set(i, args))
349			retval = 1;
350	}
351	fclose(fp);
352	return (retval);
353}
354
355void
356getsocket()
357{
358	if (s < 0) {
359		s = socket(PF_ROUTE, SOCK_RAW, 0);
360		if (s < 0) {
361			err(1, "socket");
362			/* NOTREACHED */
363		}
364	}
365}
366
367struct	sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
368struct	sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
369struct	sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
370time_t	expire_time;
371int	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	sin->sin6_scope_id =
409	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
410	ea = (u_char *)LLADDR(&sdl_m);
411	if (ndp_ether_aton(eaddr, ea) == 0)
412		sdl_m.sdl_alen = 6;
413	flags = expire_time = 0;
414	while (argc-- > 0) {
415		if (strncmp(argv[0], "temp", 4) == 0) {
416			struct timeval now;
417
418			gettimeofday(&now, 0);
419			expire_time = now.tv_sec + 20 * 60;
420		} else if (strncmp(argv[0], "proxy", 5) == 0)
421			flags |= RTF_ANNOUNCE;
422		argv++;
423	}
424	if (rtmsg(RTM_GET) < 0) {
425		errx(1, "RTM_GET(%s) failed", host);
426		/* NOTREACHED */
427	}
428	sin = (struct sockaddr_in6 *)(rtm + 1);
429	sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
430	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
431		if (sdl->sdl_family == AF_LINK &&
432		    !(rtm->rtm_flags & RTF_GATEWAY)) {
433			switch (sdl->sdl_type) {
434			case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
435			case IFT_ISO88024: case IFT_ISO88025:
436			case IFT_L2VLAN: case IFT_BRIDGE:
437				goto overwrite;
438			}
439		}
440		fprintf(stderr, "set: cannot configure a new entry\n");
441		return 1;
442	}
443
444overwrite:
445	if (sdl->sdl_family != AF_LINK) {
446		printf("cannot intuit interface index and type for %s\n", host);
447		return (1);
448	}
449	sdl_m.sdl_type = sdl->sdl_type;
450	sdl_m.sdl_index = sdl->sdl_index;
451	return (rtmsg(RTM_ADD));
452}
453
454/*
455 * Display an individual neighbor cache entry
456 */
457void
458get(host)
459	char *host;
460{
461	struct sockaddr_in6 *sin = &sin_m;
462	struct addrinfo hints, *res;
463	int gai_error;
464
465	sin_m = blank_sin;
466	bzero(&hints, sizeof(hints));
467	hints.ai_family = AF_INET6;
468	gai_error = getaddrinfo(host, NULL, &hints, &res);
469	if (gai_error) {
470		fprintf(stderr, "ndp: %s: %s\n", host,
471		    gai_strerror(gai_error));
472		return;
473	}
474	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
475	dump(&sin->sin6_addr, 0);
476	if (found_entry == 0) {
477		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
478		    sizeof(host_buf), NULL ,0,
479		    (nflag ? NI_NUMERICHOST : 0));
480		printf("%s (%s) -- no entry\n", host, host_buf);
481		exit(1);
482	}
483}
484
485/*
486 * Delete a neighbor cache entry
487 */
488int
489delete(host)
490	char *host;
491{
492	struct sockaddr_in6 *sin = &sin_m;
493	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
494	register char *cp = m_rtmsg.m_space;
495	struct sockaddr_dl *sdl;
496	struct addrinfo hints, *res;
497	int gai_error;
498
499	getsocket();
500	sin_m = blank_sin;
501
502	bzero(&hints, sizeof(hints));
503	hints.ai_family = AF_INET6;
504	gai_error = getaddrinfo(host, NULL, &hints, &res);
505	if (gai_error) {
506		fprintf(stderr, "ndp: %s: %s\n", host,
507		    gai_strerror(gai_error));
508		return 1;
509	}
510	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
511	sin->sin6_scope_id =
512	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
513	if (rtmsg(RTM_GET) < 0) {
514		errx(1, "RTM_GET(%s) failed", host);
515		/* NOTREACHED */
516	}
517	sin = (struct sockaddr_in6 *)(rtm + 1);
518	sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
519	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
520		if (sdl->sdl_family == AF_LINK &&
521		    !(rtm->rtm_flags & RTF_GATEWAY)) {
522			goto delete;
523		}
524		fprintf(stderr, "delete: cannot delete non-NDP entry\n");
525		return 1;
526	}
527
528delete:
529	if (sdl->sdl_family != AF_LINK) {
530		printf("cannot locate %s\n", host);
531		return (1);
532	}
533        /*
534         * need to reinit the field because it has rt_key
535         * but we want the actual address
536         */
537	NEXTADDR(RTA_DST, sin_m);
538	rtm->rtm_flags |= RTF_LLDATA;
539	if (rtmsg(RTM_DELETE) == 0) {
540		getnameinfo((struct sockaddr *)sin,
541		    sin->sin6_len, host_buf,
542		    sizeof(host_buf), NULL, 0,
543		    (nflag ? NI_NUMERICHOST : 0));
544		printf("%s (%s) deleted\n", host, host_buf);
545	}
546
547	return 0;
548}
549
550#define W_ADDR	36
551#define W_LL	17
552#define W_IF	6
553
554/*
555 * Dump the entire neighbor cache
556 */
557void
558dump(addr, cflag)
559	struct in6_addr *addr;
560	int cflag;
561{
562	int mib[6];
563	size_t needed;
564	char *lim, *buf, *next;
565	struct rt_msghdr *rtm;
566	struct sockaddr_in6 *sin;
567	struct sockaddr_dl *sdl;
568	extern int h_errno;
569	struct in6_nbrinfo *nbi;
570	struct timeval now;
571	int addrwidth;
572	int llwidth;
573	int ifwidth;
574	char flgbuf[8];
575	char *ifname;
576
577	/* Print header */
578	if (!tflag && !cflag)
579		printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
580		    W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
581		    W_IF, W_IF, "Netif", "Expire", "S", "Flags");
582
583again:;
584	mib[0] = CTL_NET;
585	mib[1] = PF_ROUTE;
586	mib[2] = 0;
587	mib[3] = AF_INET6;
588	mib[4] = NET_RT_FLAGS;
589#ifdef RTF_LLINFO
590	mib[5] = RTF_LLINFO;
591#else
592	mib[5] = 0;
593#endif
594	if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
595		err(1, "sysctl(PF_ROUTE estimate)");
596	if (needed > 0) {
597		if ((buf = malloc(needed)) == NULL)
598			err(1, "malloc");
599		if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
600			err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
601		lim = buf + needed;
602	} else
603		buf = lim = NULL;
604
605	for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
606		int isrouter = 0, prbs = 0;
607
608		rtm = (struct rt_msghdr *)next;
609		sin = (struct sockaddr_in6 *)(rtm + 1);
610		sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
611
612		/*
613		 * Some OSes can produce a route that has the LINK flag but
614		 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
615		 * and BSD/OS, where xx is not the interface identifier on
616		 * lo0).  Such routes entry would annoy getnbrinfo() below,
617		 * so we skip them.
618		 * XXX: such routes should have the GATEWAY flag, not the
619		 * LINK flag.  However, there is rotten routing software
620		 * that advertises all routes that have the GATEWAY flag.
621		 * Thus, KAME kernel intentionally does not set the LINK flag.
622		 * What is to be fixed is not ndp, but such routing software
623		 * (and the kernel workaround)...
624		 */
625		if (sdl->sdl_family != AF_LINK)
626			continue;
627
628		if (!(rtm->rtm_flags & RTF_HOST))
629			continue;
630
631		if (addr) {
632			if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
633				continue;
634			found_entry = 1;
635		} else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
636			continue;
637		if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
638		    IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
639			/* XXX: should scope id be filled in the kernel? */
640			if (sin->sin6_scope_id == 0)
641				sin->sin6_scope_id = sdl->sdl_index;
642		}
643		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
644		    sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
645		if (cflag) {
646#ifdef RTF_WASCLONED
647			if (rtm->rtm_flags & RTF_WASCLONED)
648				delete(host_buf);
649#elif defined(RTF_CLONED)
650			if (rtm->rtm_flags & RTF_CLONED)
651				delete(host_buf);
652#else
653			delete(host_buf);
654#endif
655			continue;
656		}
657		gettimeofday(&now, 0);
658		if (tflag)
659			ts_print(&now);
660
661		addrwidth = strlen(host_buf);
662		if (addrwidth < W_ADDR)
663			addrwidth = W_ADDR;
664		llwidth = strlen(ether_str(sdl));
665		if (W_ADDR + W_LL - addrwidth > llwidth)
666			llwidth = W_ADDR + W_LL - addrwidth;
667		ifname = if_indextoname(sdl->sdl_index, ifix_buf);
668		if (!ifname)
669			ifname = "?";
670		ifwidth = strlen(ifname);
671		if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
672			ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
673
674		printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
675		    llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
676
677		/* Print neighbor discovery specific informations */
678		nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
679		if (nbi) {
680			if (nbi->expire > now.tv_sec) {
681				printf(" %-9.9s",
682				    sec2str(nbi->expire - now.tv_sec));
683			} else if (nbi->expire == 0)
684				printf(" %-9.9s", "permanent");
685			else
686				printf(" %-9.9s", "expired");
687
688			switch (nbi->state) {
689			case ND6_LLINFO_NOSTATE:
690				 printf(" N");
691				 break;
692#ifdef ND6_LLINFO_WAITDELETE
693			case ND6_LLINFO_WAITDELETE:
694				 printf(" W");
695				 break;
696#endif
697			case ND6_LLINFO_INCOMPLETE:
698				 printf(" I");
699				 break;
700			case ND6_LLINFO_REACHABLE:
701				 printf(" R");
702				 break;
703			case ND6_LLINFO_STALE:
704				 printf(" S");
705				 break;
706			case ND6_LLINFO_DELAY:
707				 printf(" D");
708				 break;
709			case ND6_LLINFO_PROBE:
710				 printf(" P");
711				 break;
712			default:
713				 printf(" ?");
714				 break;
715			}
716
717			isrouter = nbi->isrouter;
718			prbs = nbi->asked;
719		} else {
720			warnx("failed to get neighbor information");
721			printf("  ");
722		}
723
724		/*
725		 * other flags. R: router, P: proxy, W: ??
726		 */
727		if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
728			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
729			    isrouter ? "R" : "",
730			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
731		} else {
732			sin = (struct sockaddr_in6 *)
733			    (sdl->sdl_len + (char *)sdl);
734#if 0	/* W and P are mystery even for us */
735			snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
736			    isrouter ? "R" : "",
737			    !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
738			    (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
739			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
740#else
741			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
742			    isrouter ? "R" : "",
743			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
744#endif
745		}
746		printf(" %s", flgbuf);
747
748		if (prbs)
749			printf(" %d", prbs);
750
751		printf("\n");
752	}
753	if (buf != NULL)
754		free(buf);
755
756	if (repeat) {
757		printf("\n");
758		fflush(stdout);
759		sleep(repeat);
760		goto again;
761	}
762}
763
764static struct in6_nbrinfo *
765getnbrinfo(addr, ifindex, warning)
766	struct in6_addr *addr;
767	int ifindex;
768	int warning;
769{
770	static struct in6_nbrinfo nbi;
771	int s;
772
773	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
774		err(1, "socket");
775
776	bzero(&nbi, sizeof(nbi));
777	if_indextoname(ifindex, nbi.ifname);
778	nbi.addr = *addr;
779	if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
780		if (warning)
781			warn("ioctl(SIOCGNBRINFO_IN6)");
782		close(s);
783		return(NULL);
784	}
785
786	close(s);
787	return(&nbi);
788}
789
790static char *
791ether_str(struct sockaddr_dl *sdl)
792{
793	static char hbuf[NI_MAXHOST];
794	char *cp;
795
796	if (sdl->sdl_alen == ETHER_ADDR_LEN) {
797		strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
798		    sizeof(hbuf));
799	} else if (sdl->sdl_alen) {
800		int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
801		snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
802	} else
803		snprintf(hbuf, sizeof(hbuf), "(incomplete)");
804
805	return(hbuf);
806}
807
808int
809ndp_ether_aton(a, n)
810	char *a;
811	u_char *n;
812{
813	int i, o[6];
814
815	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
816	    &o[3], &o[4], &o[5]);
817	if (i != 6) {
818		fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
819		return (1);
820	}
821	for (i = 0; i < 6; i++)
822		n[i] = o[i];
823	return (0);
824}
825
826void
827usage()
828{
829	printf("usage: ndp [-nt] hostname\n");
830	printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
831	printf("       ndp [-nt] -A wait\n");
832	printf("       ndp [-nt] -d hostname\n");
833	printf("       ndp [-nt] -f filename\n");
834	printf("       ndp [-nt] -i interface [flags...]\n");
835#ifdef SIOCSDEFIFACE_IN6
836	printf("       ndp [-nt] -I [interface|delete]\n");
837#endif
838	printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
839	exit(1);
840}
841
842int
843rtmsg(cmd)
844	int cmd;
845{
846	static int seq;
847	int rlen;
848	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
849	register char *cp = m_rtmsg.m_space;
850	register int l;
851
852	errno = 0;
853	if (cmd == RTM_DELETE)
854		goto doit;
855	bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
856	rtm->rtm_flags = flags;
857	rtm->rtm_version = RTM_VERSION;
858
859	switch (cmd) {
860	default:
861		fprintf(stderr, "ndp: internal wrong cmd\n");
862		exit(1);
863	case RTM_ADD:
864		rtm->rtm_addrs |= RTA_GATEWAY;
865		if (expire_time) {
866			rtm->rtm_rmx.rmx_expire = expire_time;
867			rtm->rtm_inits = RTV_EXPIRE;
868		}
869		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
870#if 0 /* we don't support ipv6addr/128 type proxying */
871		if (rtm->rtm_flags & RTF_ANNOUNCE) {
872			rtm->rtm_flags &= ~RTF_HOST;
873			rtm->rtm_addrs |= RTA_NETMASK;
874		}
875#endif
876		/* FALLTHROUGH */
877	case RTM_GET:
878		rtm->rtm_addrs |= RTA_DST;
879	}
880
881	NEXTADDR(RTA_DST, sin_m);
882	NEXTADDR(RTA_GATEWAY, sdl_m);
883#if 0 /* we don't support ipv6addr/128 type proxying */
884	memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
885	NEXTADDR(RTA_NETMASK, so_mask);
886#endif
887
888	rtm->rtm_msglen = cp - (char *)&m_rtmsg;
889doit:
890	l = rtm->rtm_msglen;
891	rtm->rtm_seq = ++seq;
892	rtm->rtm_type = cmd;
893	if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
894		if (errno != ESRCH || cmd != RTM_DELETE) {
895			err(1, "writing to routing socket");
896			/* NOTREACHED */
897		}
898	}
899	do {
900		l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
901	} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
902	if (l < 0)
903		(void) fprintf(stderr, "ndp: read from routing socket: %s\n",
904		    strerror(errno));
905	return (0);
906}
907
908void
909ifinfo(ifname, argc, argv)
910	char *ifname;
911	int argc;
912	char **argv;
913{
914	struct in6_ndireq nd;
915	int i, s;
916	u_int32_t newflags;
917#ifdef IPV6CTL_USETEMPADDR
918	u_int8_t nullbuf[8];
919#endif
920
921	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
922		err(1, "socket");
923		/* NOTREACHED */
924	}
925	bzero(&nd, sizeof(nd));
926	strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
927	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
928		err(1, "ioctl(SIOCGIFINFO_IN6)");
929		/* NOTREACHED */
930	}
931#define ND nd.ndi
932	newflags = ND.flags;
933	for (i = 0; i < argc; i++) {
934		int clear = 0;
935		char *cp = argv[i];
936
937		if (*cp == '-') {
938			clear = 1;
939			cp++;
940		}
941
942#define SETFLAG(s, f) \
943	do {\
944		if (strcmp(cp, (s)) == 0) {\
945			if (clear)\
946				newflags &= ~(f);\
947			else\
948				newflags |= (f);\
949		}\
950	} while (0)
951/*
952 * XXX: this macro is not 100% correct, in that it matches "nud" against
953 *      "nudbogus".  But we just let it go since this is minor.
954 */
955#define SETVALUE(f, v) \
956	do { \
957		char *valptr; \
958		unsigned long newval; \
959		v = 0; /* unspecified */ \
960		if (strncmp(cp, f, strlen(f)) == 0) { \
961			valptr = strchr(cp, '='); \
962			if (valptr == NULL) \
963				err(1, "syntax error in %s field", (f)); \
964			errno = 0; \
965			newval = strtoul(++valptr, NULL, 0); \
966			if (errno) \
967				err(1, "syntax error in %s's value", (f)); \
968			v = newval; \
969		} \
970	} while (0)
971
972		SETFLAG("disabled", ND6_IFF_IFDISABLED);
973		SETFLAG("nud", ND6_IFF_PERFORMNUD);
974#ifdef ND6_IFF_ACCEPT_RTADV
975		SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
976#endif
977#ifdef ND6_IFF_AUTO_LINKLOCAL
978		SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
979#endif
980#ifdef ND6_IFF_NO_PREFER_IFACE
981		SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
982#endif
983		SETVALUE("basereachable", ND.basereachable);
984		SETVALUE("retrans", ND.retrans);
985		SETVALUE("curhlim", ND.chlim);
986
987		ND.flags = newflags;
988		if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
989			err(1, "ioctl(SIOCSIFINFO_IN6)");
990			/* NOTREACHED */
991		}
992#undef SETFLAG
993#undef SETVALUE
994	}
995
996	if (!ND.initialized) {
997		errx(1, "%s: not initialized yet", ifname);
998		/* NOTREACHED */
999	}
1000
1001	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1002		err(1, "ioctl(SIOCGIFINFO_IN6)");
1003		/* NOTREACHED */
1004	}
1005	printf("linkmtu=%d", ND.linkmtu);
1006	printf(", maxmtu=%d", ND.maxmtu);
1007	printf(", curhlim=%d", ND.chlim);
1008	printf(", basereachable=%ds%dms",
1009	    ND.basereachable / 1000, ND.basereachable % 1000);
1010	printf(", reachable=%ds", ND.reachable);
1011	printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
1012#ifdef IPV6CTL_USETEMPADDR
1013	memset(nullbuf, 0, sizeof(nullbuf));
1014	if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1015		int j;
1016		u_int8_t *rbuf;
1017
1018		for (i = 0; i < 3; i++) {
1019			switch (i) {
1020			case 0:
1021				printf("\nRandom seed(0): ");
1022				rbuf = ND.randomseed0;
1023				break;
1024			case 1:
1025				printf("\nRandom seed(1): ");
1026				rbuf = ND.randomseed1;
1027				break;
1028			case 2:
1029				printf("\nRandom ID:      ");
1030				rbuf = ND.randomid;
1031				break;
1032			default:
1033				errx(1, "impossible case for tempaddr display");
1034			}
1035			for (j = 0; j < 8; j++)
1036				printf("%02x", rbuf[j]);
1037		}
1038	}
1039#endif
1040	if (ND.flags) {
1041		printf("\nFlags: ");
1042#ifdef ND6_IFF_IFDISABLED
1043		if ((ND.flags & ND6_IFF_IFDISABLED))
1044			printf("disabled ");
1045#endif
1046		if ((ND.flags & ND6_IFF_PERFORMNUD))
1047			printf("nud ");
1048#ifdef ND6_IFF_ACCEPT_RTADV
1049		if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1050			printf("accept_rtadv ");
1051#endif
1052#ifdef ND6_IFF_AUTO_LINKLOCAL
1053		if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1054			printf("auto_linklocal ");
1055#endif
1056#ifdef ND6_IFF_NO_PREFER_IFACE
1057		if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1058			printf("no_prefer_iface ");
1059#endif
1060	}
1061	putc('\n', stdout);
1062#undef ND
1063
1064	close(s);
1065}
1066
1067#ifndef ND_RA_FLAG_RTPREF_MASK	/* XXX: just for compilation on *BSD release */
1068#define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
1069#endif
1070
1071void
1072rtrlist()
1073{
1074#ifdef ICMPV6CTL_ND6_DRLIST
1075	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1076	char *buf;
1077	struct in6_defrouter *p, *ep;
1078	size_t l;
1079	struct timeval now;
1080
1081	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1082		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1083		/*NOTREACHED*/
1084	}
1085	if (l == 0)
1086		return;
1087	buf = malloc(l);
1088	if (!buf) {
1089		err(1, "malloc");
1090		/*NOTREACHED*/
1091	}
1092	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1093		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1094		/*NOTREACHED*/
1095	}
1096
1097	ep = (struct in6_defrouter *)(buf + l);
1098	for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1099		int rtpref;
1100
1101		if (getnameinfo((struct sockaddr *)&p->rtaddr,
1102		    p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1103		    (nflag ? NI_NUMERICHOST : 0)) != 0)
1104			strlcpy(host_buf, "?", sizeof(host_buf));
1105
1106		printf("%s if=%s", host_buf,
1107		    if_indextoname(p->if_index, ifix_buf));
1108		printf(", flags=%s%s",
1109		    p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1110		    p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1111		rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1112		printf(", pref=%s", rtpref_str[rtpref]);
1113
1114		gettimeofday(&now, 0);
1115		if (p->expire == 0)
1116			printf(", expire=Never\n");
1117		else
1118			printf(", expire=%s\n",
1119			    sec2str(p->expire - now.tv_sec));
1120	}
1121	free(buf);
1122#else
1123	struct in6_drlist dr;
1124	int s, i;
1125	struct timeval now;
1126
1127	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1128		err(1, "socket");
1129		/* NOTREACHED */
1130	}
1131	bzero(&dr, sizeof(dr));
1132	strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1133	if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1134		err(1, "ioctl(SIOCGDRLST_IN6)");
1135		/* NOTREACHED */
1136	}
1137#define DR dr.defrouter[i]
1138	for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1139		struct sockaddr_in6 sin6;
1140
1141		bzero(&sin6, sizeof(sin6));
1142		sin6.sin6_family = AF_INET6;
1143		sin6.sin6_len = sizeof(sin6);
1144		sin6.sin6_addr = DR.rtaddr;
1145		getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1146		    sizeof(host_buf), NULL, 0,
1147		    (nflag ? NI_NUMERICHOST : 0));
1148
1149		printf("%s if=%s", host_buf,
1150		    if_indextoname(DR.if_index, ifix_buf));
1151		printf(", flags=%s%s",
1152		    DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1153		    DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1154		gettimeofday(&now, 0);
1155		if (DR.expire == 0)
1156			printf(", expire=Never\n");
1157		else
1158			printf(", expire=%s\n",
1159			    sec2str(DR.expire - now.tv_sec));
1160	}
1161#undef DR
1162	close(s);
1163#endif
1164}
1165
1166void
1167plist()
1168{
1169#ifdef ICMPV6CTL_ND6_PRLIST
1170	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1171	char *buf;
1172	struct in6_prefix *p, *ep, *n;
1173	struct sockaddr_in6 *advrtr;
1174	size_t l;
1175	struct timeval now;
1176	const int niflags = NI_NUMERICHOST;
1177	int ninflags = nflag ? NI_NUMERICHOST : 0;
1178	char namebuf[NI_MAXHOST];
1179
1180	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1181		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1182		/*NOTREACHED*/
1183	}
1184	buf = malloc(l);
1185	if (!buf) {
1186		err(1, "malloc");
1187		/*NOTREACHED*/
1188	}
1189	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1190		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1191		/*NOTREACHED*/
1192	}
1193
1194	ep = (struct in6_prefix *)(buf + l);
1195	for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1196		advrtr = (struct sockaddr_in6 *)(p + 1);
1197		n = (struct in6_prefix *)&advrtr[p->advrtrs];
1198
1199		if (getnameinfo((struct sockaddr *)&p->prefix,
1200		    p->prefix.sin6_len, namebuf, sizeof(namebuf),
1201		    NULL, 0, niflags) != 0)
1202			strlcpy(namebuf, "?", sizeof(namebuf));
1203		printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1204		    if_indextoname(p->if_index, ifix_buf));
1205
1206		gettimeofday(&now, 0);
1207		/*
1208		 * meaning of fields, especially flags, is very different
1209		 * by origin.  notify the difference to the users.
1210		 */
1211		printf("flags=%s%s%s%s%s",
1212		    p->raflags.onlink ? "L" : "",
1213		    p->raflags.autonomous ? "A" : "",
1214		    (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1215		    (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1216#ifdef NDPRF_HOME
1217		    (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1218#else
1219		    ""
1220#endif
1221		    );
1222		if (p->vltime == ND6_INFINITE_LIFETIME)
1223			printf(" vltime=infinity");
1224		else
1225			printf(" vltime=%lu", (unsigned long)p->vltime);
1226		if (p->pltime == ND6_INFINITE_LIFETIME)
1227			printf(", pltime=infinity");
1228		else
1229			printf(", pltime=%lu", (unsigned long)p->pltime);
1230		if (p->expire == 0)
1231			printf(", expire=Never");
1232		else if (p->expire >= now.tv_sec)
1233			printf(", expire=%s",
1234			    sec2str(p->expire - now.tv_sec));
1235		else
1236			printf(", expired");
1237		printf(", ref=%d", p->refcnt);
1238		printf("\n");
1239		/*
1240		 * "advertising router" list is meaningful only if the prefix
1241		 * information is from RA.
1242		 */
1243		if (p->advrtrs) {
1244			int j;
1245			struct sockaddr_in6 *sin6;
1246
1247			sin6 = advrtr;
1248			printf("  advertised by\n");
1249			for (j = 0; j < p->advrtrs; j++) {
1250				struct in6_nbrinfo *nbi;
1251
1252				if (getnameinfo((struct sockaddr *)sin6,
1253				    sin6->sin6_len, namebuf, sizeof(namebuf),
1254				    NULL, 0, ninflags) != 0)
1255					strlcpy(namebuf, "?", sizeof(namebuf));
1256				printf("    %s", namebuf);
1257
1258				nbi = getnbrinfo(&sin6->sin6_addr,
1259				    p->if_index, 0);
1260				if (nbi) {
1261					switch (nbi->state) {
1262					case ND6_LLINFO_REACHABLE:
1263					case ND6_LLINFO_STALE:
1264					case ND6_LLINFO_DELAY:
1265					case ND6_LLINFO_PROBE:
1266						printf(" (reachable)\n");
1267						break;
1268					default:
1269						printf(" (unreachable)\n");
1270					}
1271				} else
1272					printf(" (no neighbor state)\n");
1273				sin6++;
1274			}
1275		} else
1276			printf("  No advertising router\n");
1277	}
1278	free(buf);
1279#else
1280	struct in6_prlist pr;
1281	int s, i;
1282	struct timeval now;
1283
1284	gettimeofday(&now, 0);
1285
1286	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1287		err(1, "socket");
1288		/* NOTREACHED */
1289	}
1290	bzero(&pr, sizeof(pr));
1291	strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1292	if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1293		err(1, "ioctl(SIOCGPRLST_IN6)");
1294		/* NOTREACHED */
1295	}
1296#define PR pr.prefix[i]
1297	for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1298		struct sockaddr_in6 p6;
1299		char namebuf[NI_MAXHOST];
1300		int niflags;
1301
1302#ifdef NDPRF_ONLINK
1303		p6 = PR.prefix;
1304#else
1305		memset(&p6, 0, sizeof(p6));
1306		p6.sin6_family = AF_INET6;
1307		p6.sin6_len = sizeof(p6);
1308		p6.sin6_addr = PR.prefix;
1309#endif
1310		niflags = NI_NUMERICHOST;
1311		if (getnameinfo((struct sockaddr *)&p6,
1312		    sizeof(p6), namebuf, sizeof(namebuf),
1313		    NULL, 0, niflags)) {
1314			warnx("getnameinfo failed");
1315			continue;
1316		}
1317		printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1318		    if_indextoname(PR.if_index, ifix_buf));
1319
1320		gettimeofday(&now, 0);
1321		/*
1322		 * meaning of fields, especially flags, is very different
1323		 * by origin.  notify the difference to the users.
1324		 */
1325#if 0
1326		printf("  %s",
1327		    PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1328#endif
1329#ifdef NDPRF_ONLINK
1330		printf("flags=%s%s%s%s%s",
1331		    PR.raflags.onlink ? "L" : "",
1332		    PR.raflags.autonomous ? "A" : "",
1333		    (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1334		    (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1335#ifdef NDPRF_HOME
1336		    (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1337#else
1338		    ""
1339#endif
1340		    );
1341#else
1342		printf("flags=%s%s",
1343		    PR.raflags.onlink ? "L" : "",
1344		    PR.raflags.autonomous ? "A" : "");
1345#endif
1346		if (PR.vltime == ND6_INFINITE_LIFETIME)
1347			printf(" vltime=infinity");
1348		else
1349			printf(" vltime=%lu", PR.vltime);
1350		if (PR.pltime == ND6_INFINITE_LIFETIME)
1351			printf(", pltime=infinity");
1352		else
1353			printf(", pltime=%lu", PR.pltime);
1354		if (PR.expire == 0)
1355			printf(", expire=Never");
1356		else if (PR.expire >= now.tv_sec)
1357			printf(", expire=%s",
1358			    sec2str(PR.expire - now.tv_sec));
1359		else
1360			printf(", expired");
1361#ifdef NDPRF_ONLINK
1362		printf(", ref=%d", PR.refcnt);
1363#endif
1364#if 0
1365		switch (PR.origin) {
1366		case PR_ORIG_RA:
1367			printf(", origin=RA");
1368			break;
1369		case PR_ORIG_RR:
1370			printf(", origin=RR");
1371			break;
1372		case PR_ORIG_STATIC:
1373			printf(", origin=static");
1374			break;
1375		case PR_ORIG_KERNEL:
1376			printf(", origin=kernel");
1377			break;
1378		default:
1379			printf(", origin=?");
1380			break;
1381		}
1382#endif
1383		printf("\n");
1384		/*
1385		 * "advertising router" list is meaningful only if the prefix
1386		 * information is from RA.
1387		 */
1388		if (0 &&	/* prefix origin is almost obsolted */
1389		    PR.origin != PR_ORIG_RA)
1390			;
1391		else if (PR.advrtrs) {
1392			int j;
1393			printf("  advertised by\n");
1394			for (j = 0; j < PR.advrtrs; j++) {
1395				struct sockaddr_in6 sin6;
1396				struct in6_nbrinfo *nbi;
1397
1398				bzero(&sin6, sizeof(sin6));
1399				sin6.sin6_family = AF_INET6;
1400				sin6.sin6_len = sizeof(sin6);
1401				sin6.sin6_addr = PR.advrtr[j];
1402				sin6.sin6_scope_id = PR.if_index; /* XXX */
1403				getnameinfo((struct sockaddr *)&sin6,
1404				    sin6.sin6_len, host_buf,
1405				    sizeof(host_buf), NULL, 0,
1406				    (nflag ? NI_NUMERICHOST : 0));
1407				printf("    %s", host_buf);
1408
1409				nbi = getnbrinfo(&sin6.sin6_addr,
1410				    PR.if_index, 0);
1411				if (nbi) {
1412					switch (nbi->state) {
1413					case ND6_LLINFO_REACHABLE:
1414					case ND6_LLINFO_STALE:
1415					case ND6_LLINFO_DELAY:
1416					case ND6_LLINFO_PROBE:
1417						 printf(" (reachable)\n");
1418						 break;
1419					default:
1420						 printf(" (unreachable)\n");
1421					}
1422				} else
1423					printf(" (no neighbor state)\n");
1424			}
1425			if (PR.advrtrs > DRLSTSIZ)
1426				printf("    and %d routers\n",
1427				    PR.advrtrs - DRLSTSIZ);
1428		} else
1429			printf("  No advertising router\n");
1430	}
1431#undef PR
1432	close(s);
1433#endif
1434}
1435
1436void
1437pfx_flush()
1438{
1439	char dummyif[IFNAMSIZ+8];
1440	int s;
1441
1442	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1443		err(1, "socket");
1444	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1445	if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1446		err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1447}
1448
1449void
1450rtr_flush()
1451{
1452	char dummyif[IFNAMSIZ+8];
1453	int s;
1454
1455	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1456		err(1, "socket");
1457	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1458	if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1459		err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1460
1461	close(s);
1462}
1463
1464void
1465harmonize_rtr()
1466{
1467	char dummyif[IFNAMSIZ+8];
1468	int s;
1469
1470	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1471		err(1, "socket");
1472	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1473	if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1474		err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1475
1476	close(s);
1477}
1478
1479#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
1480static void
1481setdefif(ifname)
1482	char *ifname;
1483{
1484	struct in6_ndifreq ndifreq;
1485	unsigned int ifindex;
1486
1487	if (strcasecmp(ifname, "delete") == 0)
1488		ifindex = 0;
1489	else {
1490		if ((ifindex = if_nametoindex(ifname)) == 0)
1491			err(1, "failed to resolve i/f index for %s", ifname);
1492	}
1493
1494	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1495		err(1, "socket");
1496
1497	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1498	ndifreq.ifindex = ifindex;
1499
1500	if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1501		err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1502
1503	close(s);
1504}
1505
1506static void
1507getdefif()
1508{
1509	struct in6_ndifreq ndifreq;
1510	char ifname[IFNAMSIZ+8];
1511
1512	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1513		err(1, "socket");
1514
1515	memset(&ndifreq, 0, sizeof(ndifreq));
1516	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1517
1518	if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1519		err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1520
1521	if (ndifreq.ifindex == 0)
1522		printf("No default interface.\n");
1523	else {
1524		if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1525			err(1, "failed to resolve ifname for index %lu",
1526			    ndifreq.ifindex);
1527		printf("ND default interface = %s\n", ifname);
1528	}
1529
1530	close(s);
1531}
1532#endif
1533
1534static char *
1535sec2str(total)
1536	time_t total;
1537{
1538	static char result[256];
1539	int days, hours, mins, secs;
1540	int first = 1;
1541	char *p = result;
1542	char *ep = &result[sizeof(result)];
1543	int n;
1544
1545	days = total / 3600 / 24;
1546	hours = (total / 3600) % 24;
1547	mins = (total / 60) % 60;
1548	secs = total % 60;
1549
1550	if (days) {
1551		first = 0;
1552		n = snprintf(p, ep - p, "%dd", days);
1553		if (n < 0 || n >= ep - p)
1554			return "?";
1555		p += n;
1556	}
1557	if (!first || hours) {
1558		first = 0;
1559		n = snprintf(p, ep - p, "%dh", hours);
1560		if (n < 0 || n >= ep - p)
1561			return "?";
1562		p += n;
1563	}
1564	if (!first || mins) {
1565		first = 0;
1566		n = snprintf(p, ep - p, "%dm", mins);
1567		if (n < 0 || n >= ep - p)
1568			return "?";
1569		p += n;
1570	}
1571	snprintf(p, ep - p, "%ds", secs);
1572
1573	return(result);
1574}
1575
1576/*
1577 * Print the timestamp
1578 * from tcpdump/util.c
1579 */
1580static void
1581ts_print(tvp)
1582	const struct timeval *tvp;
1583{
1584	int s;
1585
1586	/* Default */
1587	s = (tvp->tv_sec + thiszone) % 86400;
1588	(void)printf("%02d:%02d:%02d.%06u ",
1589	    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1590}
1591
1592#undef NEXTADDR
1593