ndp.c revision 246143 
1/*	$FreeBSD: head/usr.sbin/ndp/ndp.c 246143 2013-01-31 08:55:21Z glebius $	*/
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;
370int	expire_time, flags, found_entry;
371struct	{
372	struct	rt_msghdr m_rtm;
373	char	m_space[512];
374}	m_rtmsg;
375
376/*
377 * Set an individual neighbor cache entry
378 */
379int
380set(argc, argv)
381	int argc;
382	char **argv;
383{
384	register struct sockaddr_in6 *sin = &sin_m;
385	register struct sockaddr_dl *sdl;
386	register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
387	struct addrinfo hints, *res;
388	int gai_error;
389	u_char *ea;
390	char *host = argv[0], *eaddr = argv[1];
391
392	getsocket();
393	argc -= 2;
394	argv += 2;
395	sdl_m = blank_sdl;
396	sin_m = blank_sin;
397
398	bzero(&hints, sizeof(hints));
399	hints.ai_family = AF_INET6;
400	gai_error = getaddrinfo(host, NULL, &hints, &res);
401	if (gai_error) {
402		fprintf(stderr, "ndp: %s: %s\n", host,
403			gai_strerror(gai_error));
404		return 1;
405	}
406	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
407	sin->sin6_scope_id =
408	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
409	ea = (u_char *)LLADDR(&sdl_m);
410	if (ndp_ether_aton(eaddr, ea) == 0)
411		sdl_m.sdl_alen = 6;
412	flags = expire_time = 0;
413	while (argc-- > 0) {
414		if (strncmp(argv[0], "temp", 4) == 0) {
415			struct timeval time;
416
417			gettimeofday(&time, 0);
418			expire_time = time.tv_sec + 20 * 60;
419		} else if (strncmp(argv[0], "proxy", 5) == 0)
420			flags |= RTF_ANNOUNCE;
421		argv++;
422	}
423	if (rtmsg(RTM_GET) < 0) {
424		errx(1, "RTM_GET(%s) failed", host);
425		/* NOTREACHED */
426	}
427	sin = (struct sockaddr_in6 *)(rtm + 1);
428	sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
429	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
430		if (sdl->sdl_family == AF_LINK &&
431		    !(rtm->rtm_flags & RTF_GATEWAY)) {
432			switch (sdl->sdl_type) {
433			case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
434			case IFT_ISO88024: case IFT_ISO88025:
435			case IFT_L2VLAN: case IFT_BRIDGE:
436				goto overwrite;
437			}
438		}
439		fprintf(stderr, "set: cannot configure a new entry\n");
440		return 1;
441	}
442
443overwrite:
444	if (sdl->sdl_family != AF_LINK) {
445		printf("cannot intuit interface index and type for %s\n", host);
446		return (1);
447	}
448	sdl_m.sdl_type = sdl->sdl_type;
449	sdl_m.sdl_index = sdl->sdl_index;
450	return (rtmsg(RTM_ADD));
451}
452
453/*
454 * Display an individual neighbor cache entry
455 */
456void
457get(host)
458	char *host;
459{
460	struct sockaddr_in6 *sin = &sin_m;
461	struct addrinfo hints, *res;
462	int gai_error;
463
464	sin_m = blank_sin;
465	bzero(&hints, sizeof(hints));
466	hints.ai_family = AF_INET6;
467	gai_error = getaddrinfo(host, NULL, &hints, &res);
468	if (gai_error) {
469		fprintf(stderr, "ndp: %s: %s\n", host,
470		    gai_strerror(gai_error));
471		return;
472	}
473	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
474	dump(&sin->sin6_addr, 0);
475	if (found_entry == 0) {
476		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
477		    sizeof(host_buf), NULL ,0,
478		    (nflag ? NI_NUMERICHOST : 0));
479		printf("%s (%s) -- no entry\n", host, host_buf);
480		exit(1);
481	}
482}
483
484/*
485 * Delete a neighbor cache entry
486 */
487int
488delete(host)
489	char *host;
490{
491	struct sockaddr_in6 *sin = &sin_m;
492	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
493	register char *cp = m_rtmsg.m_space;
494	struct sockaddr_dl *sdl;
495	struct addrinfo hints, *res;
496	int gai_error;
497
498	getsocket();
499	sin_m = blank_sin;
500
501	bzero(&hints, sizeof(hints));
502	hints.ai_family = AF_INET6;
503	gai_error = getaddrinfo(host, NULL, &hints, &res);
504	if (gai_error) {
505		fprintf(stderr, "ndp: %s: %s\n", host,
506		    gai_strerror(gai_error));
507		return 1;
508	}
509	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
510	sin->sin6_scope_id =
511	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
512	if (rtmsg(RTM_GET) < 0) {
513		errx(1, "RTM_GET(%s) failed", host);
514		/* NOTREACHED */
515	}
516	sin = (struct sockaddr_in6 *)(rtm + 1);
517	sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
518	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
519		if (sdl->sdl_family == AF_LINK &&
520		    !(rtm->rtm_flags & RTF_GATEWAY)) {
521			goto delete;
522		}
523		fprintf(stderr, "delete: cannot delete non-NDP entry\n");
524		return 1;
525	}
526
527delete:
528	if (sdl->sdl_family != AF_LINK) {
529		printf("cannot locate %s\n", host);
530		return (1);
531	}
532        /*
533         * need to reinit the field because it has rt_key
534         * but we want the actual address
535         */
536	NEXTADDR(RTA_DST, sin_m);
537	rtm->rtm_flags |= RTF_LLDATA;
538	if (rtmsg(RTM_DELETE) == 0) {
539		getnameinfo((struct sockaddr *)sin,
540		    sin->sin6_len, host_buf,
541		    sizeof(host_buf), NULL, 0,
542		    (nflag ? NI_NUMERICHOST : 0));
543		printf("%s (%s) deleted\n", host, host_buf);
544	}
545
546	return 0;
547}
548
549#define W_ADDR	36
550#define W_LL	17
551#define W_IF	6
552
553/*
554 * Dump the entire neighbor cache
555 */
556void
557dump(addr, cflag)
558	struct in6_addr *addr;
559	int cflag;
560{
561	int mib[6];
562	size_t needed;
563	char *lim, *buf, *next;
564	struct rt_msghdr *rtm;
565	struct sockaddr_in6 *sin;
566	struct sockaddr_dl *sdl;
567	extern int h_errno;
568	struct in6_nbrinfo *nbi;
569	struct timeval time;
570	int addrwidth;
571	int llwidth;
572	int ifwidth;
573	char flgbuf[8];
574	char *ifname;
575
576	/* Print header */
577	if (!tflag && !cflag)
578		printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
579		    W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
580		    W_IF, W_IF, "Netif", "Expire", "S", "Flags");
581
582again:;
583	mib[0] = CTL_NET;
584	mib[1] = PF_ROUTE;
585	mib[2] = 0;
586	mib[3] = AF_INET6;
587	mib[4] = NET_RT_FLAGS;
588#ifdef RTF_LLINFO
589	mib[5] = RTF_LLINFO;
590#else
591	mib[5] = 0;
592#endif
593	if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
594		err(1, "sysctl(PF_ROUTE estimate)");
595	if (needed > 0) {
596		if ((buf = malloc(needed)) == NULL)
597			err(1, "malloc");
598		if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
599			err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
600		lim = buf + needed;
601	} else
602		buf = lim = NULL;
603
604	for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
605		int isrouter = 0, prbs = 0;
606
607		rtm = (struct rt_msghdr *)next;
608		sin = (struct sockaddr_in6 *)(rtm + 1);
609		sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
610
611		/*
612		 * Some OSes can produce a route that has the LINK flag but
613		 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
614		 * and BSD/OS, where xx is not the interface identifier on
615		 * lo0).  Such routes entry would annoy getnbrinfo() below,
616		 * so we skip them.
617		 * XXX: such routes should have the GATEWAY flag, not the
618		 * LINK flag.  However, there is rotten routing software
619		 * that advertises all routes that have the GATEWAY flag.
620		 * Thus, KAME kernel intentionally does not set the LINK flag.
621		 * What is to be fixed is not ndp, but such routing software
622		 * (and the kernel workaround)...
623		 */
624		if (sdl->sdl_family != AF_LINK)
625			continue;
626
627		if (!(rtm->rtm_flags & RTF_HOST))
628			continue;
629
630		if (addr) {
631			if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
632				continue;
633			found_entry = 1;
634		} else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
635			continue;
636		if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
637		    IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
638			/* XXX: should scope id be filled in the kernel? */
639			if (sin->sin6_scope_id == 0)
640				sin->sin6_scope_id = sdl->sdl_index;
641		}
642		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
643		    sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
644		if (cflag) {
645#ifdef RTF_WASCLONED
646			if (rtm->rtm_flags & RTF_WASCLONED)
647				delete(host_buf);
648#elif defined(RTF_CLONED)
649			if (rtm->rtm_flags & RTF_CLONED)
650				delete(host_buf);
651#else
652			delete(host_buf);
653#endif
654			continue;
655		}
656		gettimeofday(&time, 0);
657		if (tflag)
658			ts_print(&time);
659
660		addrwidth = strlen(host_buf);
661		if (addrwidth < W_ADDR)
662			addrwidth = W_ADDR;
663		llwidth = strlen(ether_str(sdl));
664		if (W_ADDR + W_LL - addrwidth > llwidth)
665			llwidth = W_ADDR + W_LL - addrwidth;
666		ifname = if_indextoname(sdl->sdl_index, ifix_buf);
667		if (!ifname)
668			ifname = "?";
669		ifwidth = strlen(ifname);
670		if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
671			ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
672
673		printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
674		    llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
675
676		/* Print neighbor discovery specific informations */
677		nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
678		if (nbi) {
679			if (nbi->expire > time.tv_sec) {
680				printf(" %-9.9s",
681				    sec2str(nbi->expire - time.tv_sec));
682			} else if (nbi->expire == 0)
683				printf(" %-9.9s", "permanent");
684			else
685				printf(" %-9.9s", "expired");
686
687			switch (nbi->state) {
688			case ND6_LLINFO_NOSTATE:
689				 printf(" N");
690				 break;
691#ifdef ND6_LLINFO_WAITDELETE
692			case ND6_LLINFO_WAITDELETE:
693				 printf(" W");
694				 break;
695#endif
696			case ND6_LLINFO_INCOMPLETE:
697				 printf(" I");
698				 break;
699			case ND6_LLINFO_REACHABLE:
700				 printf(" R");
701				 break;
702			case ND6_LLINFO_STALE:
703				 printf(" S");
704				 break;
705			case ND6_LLINFO_DELAY:
706				 printf(" D");
707				 break;
708			case ND6_LLINFO_PROBE:
709				 printf(" P");
710				 break;
711			default:
712				 printf(" ?");
713				 break;
714			}
715
716			isrouter = nbi->isrouter;
717			prbs = nbi->asked;
718		} else {
719			warnx("failed to get neighbor information");
720			printf("  ");
721		}
722
723		/*
724		 * other flags. R: router, P: proxy, W: ??
725		 */
726		if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
727			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
728			    isrouter ? "R" : "",
729			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
730		} else {
731			sin = (struct sockaddr_in6 *)
732			    (sdl->sdl_len + (char *)sdl);
733#if 0	/* W and P are mystery even for us */
734			snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
735			    isrouter ? "R" : "",
736			    !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
737			    (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
738			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
739#else
740			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
741			    isrouter ? "R" : "",
742			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
743#endif
744		}
745		printf(" %s", flgbuf);
746
747		if (prbs)
748			printf(" %d", prbs);
749
750		printf("\n");
751	}
752	if (buf != NULL)
753		free(buf);
754
755	if (repeat) {
756		printf("\n");
757		fflush(stdout);
758		sleep(repeat);
759		goto again;
760	}
761}
762
763static struct in6_nbrinfo *
764getnbrinfo(addr, ifindex, warning)
765	struct in6_addr *addr;
766	int ifindex;
767	int warning;
768{
769	static struct in6_nbrinfo nbi;
770	int s;
771
772	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
773		err(1, "socket");
774
775	bzero(&nbi, sizeof(nbi));
776	if_indextoname(ifindex, nbi.ifname);
777	nbi.addr = *addr;
778	if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
779		if (warning)
780			warn("ioctl(SIOCGNBRINFO_IN6)");
781		close(s);
782		return(NULL);
783	}
784
785	close(s);
786	return(&nbi);
787}
788
789static char *
790ether_str(struct sockaddr_dl *sdl)
791{
792	static char hbuf[NI_MAXHOST];
793	char *cp;
794
795	if (sdl->sdl_alen == ETHER_ADDR_LEN) {
796		strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
797		    sizeof(hbuf));
798	} else if (sdl->sdl_alen) {
799		int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
800		snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
801	} else
802		snprintf(hbuf, sizeof(hbuf), "(incomplete)");
803
804	return(hbuf);
805}
806
807int
808ndp_ether_aton(a, n)
809	char *a;
810	u_char *n;
811{
812	int i, o[6];
813
814	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
815	    &o[3], &o[4], &o[5]);
816	if (i != 6) {
817		fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
818		return (1);
819	}
820	for (i = 0; i < 6; i++)
821		n[i] = o[i];
822	return (0);
823}
824
825void
826usage()
827{
828	printf("usage: ndp [-nt] hostname\n");
829	printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
830	printf("       ndp [-nt] -A wait\n");
831	printf("       ndp [-nt] -d hostname\n");
832	printf("       ndp [-nt] -f filename\n");
833	printf("       ndp [-nt] -i interface [flags...]\n");
834#ifdef SIOCSDEFIFACE_IN6
835	printf("       ndp [-nt] -I [interface|delete]\n");
836#endif
837	printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
838	exit(1);
839}
840
841int
842rtmsg(cmd)
843	int cmd;
844{
845	static int seq;
846	int rlen;
847	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
848	register char *cp = m_rtmsg.m_space;
849	register int l;
850
851	errno = 0;
852	if (cmd == RTM_DELETE)
853		goto doit;
854	bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
855	rtm->rtm_flags = flags;
856	rtm->rtm_version = RTM_VERSION;
857
858	switch (cmd) {
859	default:
860		fprintf(stderr, "ndp: internal wrong cmd\n");
861		exit(1);
862	case RTM_ADD:
863		rtm->rtm_addrs |= RTA_GATEWAY;
864		if (expire_time) {
865			rtm->rtm_rmx.rmx_expire = expire_time;
866			rtm->rtm_inits = RTV_EXPIRE;
867		}
868		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
869#if 0 /* we don't support ipv6addr/128 type proxying */
870		if (rtm->rtm_flags & RTF_ANNOUNCE) {
871			rtm->rtm_flags &= ~RTF_HOST;
872			rtm->rtm_addrs |= RTA_NETMASK;
873		}
874#endif
875		/* FALLTHROUGH */
876	case RTM_GET:
877		rtm->rtm_addrs |= RTA_DST;
878	}
879
880	NEXTADDR(RTA_DST, sin_m);
881	NEXTADDR(RTA_GATEWAY, sdl_m);
882#if 0 /* we don't support ipv6addr/128 type proxying */
883	memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
884	NEXTADDR(RTA_NETMASK, so_mask);
885#endif
886
887	rtm->rtm_msglen = cp - (char *)&m_rtmsg;
888doit:
889	l = rtm->rtm_msglen;
890	rtm->rtm_seq = ++seq;
891	rtm->rtm_type = cmd;
892	if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
893		if (errno != ESRCH || cmd != RTM_DELETE) {
894			err(1, "writing to routing socket");
895			/* NOTREACHED */
896		}
897	}
898	do {
899		l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
900	} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
901	if (l < 0)
902		(void) fprintf(stderr, "ndp: read from routing socket: %s\n",
903		    strerror(errno));
904	return (0);
905}
906
907void
908ifinfo(ifname, argc, argv)
909	char *ifname;
910	int argc;
911	char **argv;
912{
913	struct in6_ndireq nd;
914	int i, s;
915	u_int32_t newflags;
916#ifdef IPV6CTL_USETEMPADDR
917	u_int8_t nullbuf[8];
918#endif
919
920	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
921		err(1, "socket");
922		/* NOTREACHED */
923	}
924	bzero(&nd, sizeof(nd));
925	strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
926	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
927		err(1, "ioctl(SIOCGIFINFO_IN6)");
928		/* NOTREACHED */
929	}
930#define ND nd.ndi
931	newflags = ND.flags;
932	for (i = 0; i < argc; i++) {
933		int clear = 0;
934		char *cp = argv[i];
935
936		if (*cp == '-') {
937			clear = 1;
938			cp++;
939		}
940
941#define SETFLAG(s, f) \
942	do {\
943		if (strcmp(cp, (s)) == 0) {\
944			if (clear)\
945				newflags &= ~(f);\
946			else\
947				newflags |= (f);\
948		}\
949	} while (0)
950/*
951 * XXX: this macro is not 100% correct, in that it matches "nud" against
952 *      "nudbogus".  But we just let it go since this is minor.
953 */
954#define SETVALUE(f, v) \
955	do { \
956		char *valptr; \
957		unsigned long newval; \
958		v = 0; /* unspecified */ \
959		if (strncmp(cp, f, strlen(f)) == 0) { \
960			valptr = strchr(cp, '='); \
961			if (valptr == NULL) \
962				err(1, "syntax error in %s field", (f)); \
963			errno = 0; \
964			newval = strtoul(++valptr, NULL, 0); \
965			if (errno) \
966				err(1, "syntax error in %s's value", (f)); \
967			v = newval; \
968		} \
969	} while (0)
970
971		SETFLAG("disabled", ND6_IFF_IFDISABLED);
972		SETFLAG("nud", ND6_IFF_PERFORMNUD);
973#ifdef ND6_IFF_ACCEPT_RTADV
974		SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
975#endif
976#ifdef ND6_IFF_AUTO_LINKLOCAL
977		SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
978#endif
979#ifdef ND6_IFF_NO_PREFER_IFACE
980		SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
981#endif
982		SETVALUE("basereachable", ND.basereachable);
983		SETVALUE("retrans", ND.retrans);
984		SETVALUE("curhlim", ND.chlim);
985
986		ND.flags = newflags;
987		if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
988			err(1, "ioctl(SIOCSIFINFO_IN6)");
989			/* NOTREACHED */
990		}
991#undef SETFLAG
992#undef SETVALUE
993	}
994
995	if (!ND.initialized) {
996		errx(1, "%s: not initialized yet", ifname);
997		/* NOTREACHED */
998	}
999
1000	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1001		err(1, "ioctl(SIOCGIFINFO_IN6)");
1002		/* NOTREACHED */
1003	}
1004	printf("linkmtu=%d", ND.linkmtu);
1005	printf(", maxmtu=%d", ND.maxmtu);
1006	printf(", curhlim=%d", ND.chlim);
1007	printf(", basereachable=%ds%dms",
1008	    ND.basereachable / 1000, ND.basereachable % 1000);
1009	printf(", reachable=%ds", ND.reachable);
1010	printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
1011#ifdef IPV6CTL_USETEMPADDR
1012	memset(nullbuf, 0, sizeof(nullbuf));
1013	if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1014		int j;
1015		u_int8_t *rbuf;
1016
1017		for (i = 0; i < 3; i++) {
1018			switch (i) {
1019			case 0:
1020				printf("\nRandom seed(0): ");
1021				rbuf = ND.randomseed0;
1022				break;
1023			case 1:
1024				printf("\nRandom seed(1): ");
1025				rbuf = ND.randomseed1;
1026				break;
1027			case 2:
1028				printf("\nRandom ID:      ");
1029				rbuf = ND.randomid;
1030				break;
1031			default:
1032				errx(1, "impossible case for tempaddr display");
1033			}
1034			for (j = 0; j < 8; j++)
1035				printf("%02x", rbuf[j]);
1036		}
1037	}
1038#endif
1039	if (ND.flags) {
1040		printf("\nFlags: ");
1041#ifdef ND6_IFF_IFDISABLED
1042		if ((ND.flags & ND6_IFF_IFDISABLED))
1043			printf("disabled ");
1044#endif
1045		if ((ND.flags & ND6_IFF_PERFORMNUD))
1046			printf("nud ");
1047#ifdef ND6_IFF_ACCEPT_RTADV
1048		if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1049			printf("accept_rtadv ");
1050#endif
1051#ifdef ND6_IFF_AUTO_LINKLOCAL
1052		if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1053			printf("auto_linklocal ");
1054#endif
1055#ifdef ND6_IFF_NO_PREFER_IFACE
1056		if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1057			printf("no_prefer_iface ");
1058#endif
1059	}
1060	putc('\n', stdout);
1061#undef ND
1062
1063	close(s);
1064}
1065
1066#ifndef ND_RA_FLAG_RTPREF_MASK	/* XXX: just for compilation on *BSD release */
1067#define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
1068#endif
1069
1070void
1071rtrlist()
1072{
1073#ifdef ICMPV6CTL_ND6_DRLIST
1074	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1075	char *buf;
1076	struct in6_defrouter *p, *ep;
1077	size_t l;
1078	struct timeval time;
1079
1080	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1081		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1082		/*NOTREACHED*/
1083	}
1084	if (l == 0)
1085		return;
1086	buf = malloc(l);
1087	if (!buf) {
1088		err(1, "malloc");
1089		/*NOTREACHED*/
1090	}
1091	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1092		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1093		/*NOTREACHED*/
1094	}
1095
1096	ep = (struct in6_defrouter *)(buf + l);
1097	for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1098		int rtpref;
1099
1100		if (getnameinfo((struct sockaddr *)&p->rtaddr,
1101		    p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1102		    (nflag ? NI_NUMERICHOST : 0)) != 0)
1103			strlcpy(host_buf, "?", sizeof(host_buf));
1104
1105		printf("%s if=%s", host_buf,
1106		    if_indextoname(p->if_index, ifix_buf));
1107		printf(", flags=%s%s",
1108		    p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1109		    p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1110		rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1111		printf(", pref=%s", rtpref_str[rtpref]);
1112
1113		gettimeofday(&time, 0);
1114		if (p->expire == 0)
1115			printf(", expire=Never\n");
1116		else
1117			printf(", expire=%s\n",
1118			    sec2str(p->expire - time.tv_sec));
1119	}
1120	free(buf);
1121#else
1122	struct in6_drlist dr;
1123	int s, i;
1124	struct timeval time;
1125
1126	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1127		err(1, "socket");
1128		/* NOTREACHED */
1129	}
1130	bzero(&dr, sizeof(dr));
1131	strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1132	if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1133		err(1, "ioctl(SIOCGDRLST_IN6)");
1134		/* NOTREACHED */
1135	}
1136#define DR dr.defrouter[i]
1137	for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1138		struct sockaddr_in6 sin6;
1139
1140		bzero(&sin6, sizeof(sin6));
1141		sin6.sin6_family = AF_INET6;
1142		sin6.sin6_len = sizeof(sin6);
1143		sin6.sin6_addr = DR.rtaddr;
1144		getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1145		    sizeof(host_buf), NULL, 0,
1146		    (nflag ? NI_NUMERICHOST : 0));
1147
1148		printf("%s if=%s", host_buf,
1149		    if_indextoname(DR.if_index, ifix_buf));
1150		printf(", flags=%s%s",
1151		    DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1152		    DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1153		gettimeofday(&time, 0);
1154		if (DR.expire == 0)
1155			printf(", expire=Never\n");
1156		else
1157			printf(", expire=%s\n",
1158			    sec2str(DR.expire - time.tv_sec));
1159	}
1160#undef DR
1161	close(s);
1162#endif
1163}
1164
1165void
1166plist()
1167{
1168#ifdef ICMPV6CTL_ND6_PRLIST
1169	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1170	char *buf;
1171	struct in6_prefix *p, *ep, *n;
1172	struct sockaddr_in6 *advrtr;
1173	size_t l;
1174	struct timeval time;
1175	const int niflags = NI_NUMERICHOST;
1176	int ninflags = nflag ? NI_NUMERICHOST : 0;
1177	char namebuf[NI_MAXHOST];
1178
1179	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1180		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1181		/*NOTREACHED*/
1182	}
1183	buf = malloc(l);
1184	if (!buf) {
1185		err(1, "malloc");
1186		/*NOTREACHED*/
1187	}
1188	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1189		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1190		/*NOTREACHED*/
1191	}
1192
1193	ep = (struct in6_prefix *)(buf + l);
1194	for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1195		advrtr = (struct sockaddr_in6 *)(p + 1);
1196		n = (struct in6_prefix *)&advrtr[p->advrtrs];
1197
1198		if (getnameinfo((struct sockaddr *)&p->prefix,
1199		    p->prefix.sin6_len, namebuf, sizeof(namebuf),
1200		    NULL, 0, niflags) != 0)
1201			strlcpy(namebuf, "?", sizeof(namebuf));
1202		printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1203		    if_indextoname(p->if_index, ifix_buf));
1204
1205		gettimeofday(&time, 0);
1206		/*
1207		 * meaning of fields, especially flags, is very different
1208		 * by origin.  notify the difference to the users.
1209		 */
1210		printf("flags=%s%s%s%s%s",
1211		    p->raflags.onlink ? "L" : "",
1212		    p->raflags.autonomous ? "A" : "",
1213		    (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1214		    (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1215#ifdef NDPRF_HOME
1216		    (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1217#else
1218		    ""
1219#endif
1220		    );
1221		if (p->vltime == ND6_INFINITE_LIFETIME)
1222			printf(" vltime=infinity");
1223		else
1224			printf(" vltime=%lu", (unsigned long)p->vltime);
1225		if (p->pltime == ND6_INFINITE_LIFETIME)
1226			printf(", pltime=infinity");
1227		else
1228			printf(", pltime=%lu", (unsigned long)p->pltime);
1229		if (p->expire == 0)
1230			printf(", expire=Never");
1231		else if (p->expire >= time.tv_sec)
1232			printf(", expire=%s",
1233			    sec2str(p->expire - time.tv_sec));
1234		else
1235			printf(", expired");
1236		printf(", ref=%d", p->refcnt);
1237		printf("\n");
1238		/*
1239		 * "advertising router" list is meaningful only if the prefix
1240		 * information is from RA.
1241		 */
1242		if (p->advrtrs) {
1243			int j;
1244			struct sockaddr_in6 *sin6;
1245
1246			sin6 = advrtr;
1247			printf("  advertised by\n");
1248			for (j = 0; j < p->advrtrs; j++) {
1249				struct in6_nbrinfo *nbi;
1250
1251				if (getnameinfo((struct sockaddr *)sin6,
1252				    sin6->sin6_len, namebuf, sizeof(namebuf),
1253				    NULL, 0, ninflags) != 0)
1254					strlcpy(namebuf, "?", sizeof(namebuf));
1255				printf("    %s", namebuf);
1256
1257				nbi = getnbrinfo(&sin6->sin6_addr,
1258				    p->if_index, 0);
1259				if (nbi) {
1260					switch (nbi->state) {
1261					case ND6_LLINFO_REACHABLE:
1262					case ND6_LLINFO_STALE:
1263					case ND6_LLINFO_DELAY:
1264					case ND6_LLINFO_PROBE:
1265						printf(" (reachable)\n");
1266						break;
1267					default:
1268						printf(" (unreachable)\n");
1269					}
1270				} else
1271					printf(" (no neighbor state)\n");
1272				sin6++;
1273			}
1274		} else
1275			printf("  No advertising router\n");
1276	}
1277	free(buf);
1278#else
1279	struct in6_prlist pr;
1280	int s, i;
1281	struct timeval time;
1282
1283	gettimeofday(&time, 0);
1284
1285	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1286		err(1, "socket");
1287		/* NOTREACHED */
1288	}
1289	bzero(&pr, sizeof(pr));
1290	strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1291	if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1292		err(1, "ioctl(SIOCGPRLST_IN6)");
1293		/* NOTREACHED */
1294	}
1295#define PR pr.prefix[i]
1296	for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1297		struct sockaddr_in6 p6;
1298		char namebuf[NI_MAXHOST];
1299		int niflags;
1300
1301#ifdef NDPRF_ONLINK
1302		p6 = PR.prefix;
1303#else
1304		memset(&p6, 0, sizeof(p6));
1305		p6.sin6_family = AF_INET6;
1306		p6.sin6_len = sizeof(p6);
1307		p6.sin6_addr = PR.prefix;
1308#endif
1309		niflags = NI_NUMERICHOST;
1310		if (getnameinfo((struct sockaddr *)&p6,
1311		    sizeof(p6), namebuf, sizeof(namebuf),
1312		    NULL, 0, niflags)) {
1313			warnx("getnameinfo failed");
1314			continue;
1315		}
1316		printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1317		    if_indextoname(PR.if_index, ifix_buf));
1318
1319		gettimeofday(&time, 0);
1320		/*
1321		 * meaning of fields, especially flags, is very different
1322		 * by origin.  notify the difference to the users.
1323		 */
1324#if 0
1325		printf("  %s",
1326		    PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1327#endif
1328#ifdef NDPRF_ONLINK
1329		printf("flags=%s%s%s%s%s",
1330		    PR.raflags.onlink ? "L" : "",
1331		    PR.raflags.autonomous ? "A" : "",
1332		    (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1333		    (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1334#ifdef NDPRF_HOME
1335		    (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1336#else
1337		    ""
1338#endif
1339		    );
1340#else
1341		printf("flags=%s%s",
1342		    PR.raflags.onlink ? "L" : "",
1343		    PR.raflags.autonomous ? "A" : "");
1344#endif
1345		if (PR.vltime == ND6_INFINITE_LIFETIME)
1346			printf(" vltime=infinity");
1347		else
1348			printf(" vltime=%lu", PR.vltime);
1349		if (PR.pltime == ND6_INFINITE_LIFETIME)
1350			printf(", pltime=infinity");
1351		else
1352			printf(", pltime=%lu", PR.pltime);
1353		if (PR.expire == 0)
1354			printf(", expire=Never");
1355		else if (PR.expire >= time.tv_sec)
1356			printf(", expire=%s",
1357			    sec2str(PR.expire - time.tv_sec));
1358		else
1359			printf(", expired");
1360#ifdef NDPRF_ONLINK
1361		printf(", ref=%d", PR.refcnt);
1362#endif
1363#if 0
1364		switch (PR.origin) {
1365		case PR_ORIG_RA:
1366			printf(", origin=RA");
1367			break;
1368		case PR_ORIG_RR:
1369			printf(", origin=RR");
1370			break;
1371		case PR_ORIG_STATIC:
1372			printf(", origin=static");
1373			break;
1374		case PR_ORIG_KERNEL:
1375			printf(", origin=kernel");
1376			break;
1377		default:
1378			printf(", origin=?");
1379			break;
1380		}
1381#endif
1382		printf("\n");
1383		/*
1384		 * "advertising router" list is meaningful only if the prefix
1385		 * information is from RA.
1386		 */
1387		if (0 &&	/* prefix origin is almost obsolted */
1388		    PR.origin != PR_ORIG_RA)
1389			;
1390		else if (PR.advrtrs) {
1391			int j;
1392			printf("  advertised by\n");
1393			for (j = 0; j < PR.advrtrs; j++) {
1394				struct sockaddr_in6 sin6;
1395				struct in6_nbrinfo *nbi;
1396
1397				bzero(&sin6, sizeof(sin6));
1398				sin6.sin6_family = AF_INET6;
1399				sin6.sin6_len = sizeof(sin6);
1400				sin6.sin6_addr = PR.advrtr[j];
1401				sin6.sin6_scope_id = PR.if_index; /* XXX */
1402				getnameinfo((struct sockaddr *)&sin6,
1403				    sin6.sin6_len, host_buf,
1404				    sizeof(host_buf), NULL, 0,
1405				    (nflag ? NI_NUMERICHOST : 0));
1406				printf("    %s", host_buf);
1407
1408				nbi = getnbrinfo(&sin6.sin6_addr,
1409				    PR.if_index, 0);
1410				if (nbi) {
1411					switch (nbi->state) {
1412					case ND6_LLINFO_REACHABLE:
1413					case ND6_LLINFO_STALE:
1414					case ND6_LLINFO_DELAY:
1415					case ND6_LLINFO_PROBE:
1416						 printf(" (reachable)\n");
1417						 break;
1418					default:
1419						 printf(" (unreachable)\n");
1420					}
1421				} else
1422					printf(" (no neighbor state)\n");
1423			}
1424			if (PR.advrtrs > DRLSTSIZ)
1425				printf("    and %d routers\n",
1426				    PR.advrtrs - DRLSTSIZ);
1427		} else
1428			printf("  No advertising router\n");
1429	}
1430#undef PR
1431	close(s);
1432#endif
1433}
1434
1435void
1436pfx_flush()
1437{
1438	char dummyif[IFNAMSIZ+8];
1439	int s;
1440
1441	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1442		err(1, "socket");
1443	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1444	if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1445		err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1446}
1447
1448void
1449rtr_flush()
1450{
1451	char dummyif[IFNAMSIZ+8];
1452	int s;
1453
1454	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1455		err(1, "socket");
1456	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1457	if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1458		err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1459
1460	close(s);
1461}
1462
1463void
1464harmonize_rtr()
1465{
1466	char dummyif[IFNAMSIZ+8];
1467	int s;
1468
1469	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1470		err(1, "socket");
1471	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1472	if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1473		err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1474
1475	close(s);
1476}
1477
1478#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
1479static void
1480setdefif(ifname)
1481	char *ifname;
1482{
1483	struct in6_ndifreq ndifreq;
1484	unsigned int ifindex;
1485
1486	if (strcasecmp(ifname, "delete") == 0)
1487		ifindex = 0;
1488	else {
1489		if ((ifindex = if_nametoindex(ifname)) == 0)
1490			err(1, "failed to resolve i/f index for %s", ifname);
1491	}
1492
1493	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1494		err(1, "socket");
1495
1496	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1497	ndifreq.ifindex = ifindex;
1498
1499	if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1500		err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1501
1502	close(s);
1503}
1504
1505static void
1506getdefif()
1507{
1508	struct in6_ndifreq ndifreq;
1509	char ifname[IFNAMSIZ+8];
1510
1511	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1512		err(1, "socket");
1513
1514	memset(&ndifreq, 0, sizeof(ndifreq));
1515	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1516
1517	if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1518		err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1519
1520	if (ndifreq.ifindex == 0)
1521		printf("No default interface.\n");
1522	else {
1523		if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1524			err(1, "failed to resolve ifname for index %lu",
1525			    ndifreq.ifindex);
1526		printf("ND default interface = %s\n", ifname);
1527	}
1528
1529	close(s);
1530}
1531#endif
1532
1533static char *
1534sec2str(total)
1535	time_t total;
1536{
1537	static char result[256];
1538	int days, hours, mins, secs;
1539	int first = 1;
1540	char *p = result;
1541	char *ep = &result[sizeof(result)];
1542	int n;
1543
1544	days = total / 3600 / 24;
1545	hours = (total / 3600) % 24;
1546	mins = (total / 60) % 60;
1547	secs = total % 60;
1548
1549	if (days) {
1550		first = 0;
1551		n = snprintf(p, ep - p, "%dd", days);
1552		if (n < 0 || n >= ep - p)
1553			return "?";
1554		p += n;
1555	}
1556	if (!first || hours) {
1557		first = 0;
1558		n = snprintf(p, ep - p, "%dh", hours);
1559		if (n < 0 || n >= ep - p)
1560			return "?";
1561		p += n;
1562	}
1563	if (!first || mins) {
1564		first = 0;
1565		n = snprintf(p, ep - p, "%dm", mins);
1566		if (n < 0 || n >= ep - p)
1567			return "?";
1568		p += n;
1569	}
1570	snprintf(p, ep - p, "%ds", secs);
1571
1572	return(result);
1573}
1574
1575/*
1576 * Print the timestamp
1577 * from tcpdump/util.c
1578 */
1579static void
1580ts_print(tvp)
1581	const struct timeval *tvp;
1582{
1583	int s;
1584
1585	/* Default */
1586	s = (tvp->tv_sec + thiszone) % 86400;
1587	(void)printf("%02d:%02d:%02d.%06u ",
1588	    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1589}
1590
1591#undef NEXTADDR
1592