ndp.c revision 281143 
1/*	$FreeBSD: head/usr.sbin/ndp/ndp.c 281143 2015-04-06 09:42:23Z 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_dl.h>
87#include <net/if_types.h>
88#include <net/route.h>
89
90#include <netinet/in.h>
91#include <netinet/if_ether.h>
92
93#include <netinet/icmp6.h>
94#include <netinet6/in6_var.h>
95#include <netinet6/nd6.h>
96
97#include <arpa/inet.h>
98
99#include <ctype.h>
100#include <netdb.h>
101#include <errno.h>
102#include <nlist.h>
103#include <stdio.h>
104#include <string.h>
105#include <paths.h>
106#include <err.h>
107#include <stdlib.h>
108#include <fcntl.h>
109#include <unistd.h>
110#include "gmt2local.h"
111
112#define NEXTADDR(w, s) \
113	if (rtm->rtm_addrs & (w)) { \
114		bcopy((char *)&s, cp, sizeof(s)); cp += SA_SIZE(&s);}
115
116
117static pid_t pid;
118static int nflag;
119static int tflag;
120static int32_t thiszone;	/* time difference with gmt */
121static int s = -1;
122static int repeat = 0;
123
124char ntop_buf[INET6_ADDRSTRLEN];	/* inet_ntop() */
125char host_buf[NI_MAXHOST];		/* getnameinfo() */
126char ifix_buf[IFNAMSIZ];		/* if_indextoname() */
127
128int main(int, char **);
129static int file(char *);
130void getsocket(void);
131int set(int, char **);
132void get(char *);
133int delete(char *);
134void dump(struct sockaddr_in6 *, int);
135static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
136static char *ether_str(struct sockaddr_dl *);
137int ndp_ether_aton(char *, u_char *);
138void usage(void);
139int rtmsg(int);
140void ifinfo(char *, int, char **);
141void rtrlist(void);
142void plist(void);
143void pfx_flush(void);
144void rtr_flush(void);
145void harmonize_rtr(void);
146#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
147static void getdefif(void);
148static void setdefif(char *);
149#endif
150static char *sec2str(time_t);
151static void ts_print(const struct timeval *);
152
153#ifdef ICMPV6CTL_ND6_DRLIST
154static char *rtpref_str[] = {
155	"medium",		/* 00 */
156	"high",			/* 01 */
157	"rsv",			/* 10 */
158	"low"			/* 11 */
159};
160#endif
161
162int mode = 0;
163char *arg = NULL;
164
165int
166main(int argc, char **argv)
167{
168	int ch;
169
170	pid = getpid();
171	thiszone = gmt2local(0);
172	while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
173		switch (ch) {
174		case 'a':
175		case 'c':
176		case 'p':
177		case 'r':
178		case 'H':
179		case 'P':
180		case 'R':
181		case 's':
182		case 'I':
183			if (mode) {
184				usage();
185				/*NOTREACHED*/
186			}
187			mode = ch;
188			arg = NULL;
189			break;
190		case 'f':
191			exit(file(optarg) ? 1 : 0);
192		case 'd':
193		case 'i':
194			if (mode) {
195				usage();
196				/*NOTREACHED*/
197			}
198			mode = ch;
199			arg = optarg;
200			break;
201		case 'n':
202			nflag = 1;
203			break;
204		case 't':
205			tflag = 1;
206			break;
207		case 'A':
208			if (mode) {
209				usage();
210				/*NOTREACHED*/
211			}
212			mode = 'a';
213			repeat = atoi(optarg);
214			if (repeat < 0) {
215				usage();
216				/*NOTREACHED*/
217			}
218			break;
219		default:
220			usage();
221		}
222
223	argc -= optind;
224	argv += optind;
225
226	switch (mode) {
227	case 'a':
228	case 'c':
229		if (argc != 0) {
230			usage();
231			/*NOTREACHED*/
232		}
233		dump(0, mode == 'c');
234		break;
235	case 'd':
236		if (argc != 0) {
237			usage();
238			/*NOTREACHED*/
239		}
240		delete(arg);
241		break;
242	case 'I':
243#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
244		if (argc > 1) {
245			usage();
246			/*NOTREACHED*/
247		} else if (argc == 1) {
248			if (strcmp(*argv, "delete") == 0 ||
249			    if_nametoindex(*argv))
250				setdefif(*argv);
251			else
252				errx(1, "invalid interface %s", *argv);
253		}
254		getdefif(); /* always call it to print the result */
255		break;
256#else
257		errx(1, "not supported yet");
258		/*NOTREACHED*/
259#endif
260	case 'p':
261		if (argc != 0) {
262			usage();
263			/*NOTREACHED*/
264		}
265		plist();
266		break;
267	case 'i':
268		ifinfo(arg, argc, argv);
269		break;
270	case 'r':
271		if (argc != 0) {
272			usage();
273			/*NOTREACHED*/
274		}
275		rtrlist();
276		break;
277	case 's':
278		if (argc < 2 || argc > 4)
279			usage();
280		exit(set(argc, argv) ? 1 : 0);
281	case 'H':
282		if (argc != 0) {
283			usage();
284			/*NOTREACHED*/
285		}
286		harmonize_rtr();
287		break;
288	case 'P':
289		if (argc != 0) {
290			usage();
291			/*NOTREACHED*/
292		}
293		pfx_flush();
294		break;
295	case 'R':
296		if (argc != 0) {
297			usage();
298			/*NOTREACHED*/
299		}
300		rtr_flush();
301		break;
302	case 0:
303		if (argc != 1) {
304			usage();
305			/*NOTREACHED*/
306		}
307		get(argv[0]);
308		break;
309	}
310	exit(0);
311}
312
313/*
314 * Process a file to set standard ndp entries
315 */
316static int
317file(char *name)
318{
319	FILE *fp;
320	int i, retval;
321	char line[100], arg[5][50], *args[5], *p;
322
323	if ((fp = fopen(name, "r")) == NULL)
324		err(1, "cannot open %s", name);
325	args[0] = &arg[0][0];
326	args[1] = &arg[1][0];
327	args[2] = &arg[2][0];
328	args[3] = &arg[3][0];
329	args[4] = &arg[4][0];
330	retval = 0;
331	while (fgets(line, sizeof(line), fp) != NULL) {
332		if ((p = strchr(line, '#')) != NULL)
333			*p = '\0';
334		for (p = line; isblank(*p); p++);
335		if (*p == '\n' || *p == '\0')
336			continue;
337		i = sscanf(line, "%49s %49s %49s %49s %49s",
338		    arg[0], arg[1], arg[2], arg[3], arg[4]);
339		if (i < 2) {
340			warnx("bad line: %s", line);
341			retval = 1;
342			continue;
343		}
344		if (set(i, args))
345			retval = 1;
346	}
347	fclose(fp);
348	return (retval);
349}
350
351void
352getsocket()
353{
354	if (s < 0) {
355		s = socket(PF_ROUTE, SOCK_RAW, 0);
356		if (s < 0) {
357			err(1, "socket");
358			/* NOTREACHED */
359		}
360	}
361}
362
363struct	sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
364struct	sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
365struct	sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
366time_t	expire_time;
367int	flags, found_entry;
368struct	{
369	struct	rt_msghdr m_rtm;
370	char	m_space[512];
371}	m_rtmsg;
372
373/*
374 * Set an individual neighbor cache entry
375 */
376int
377set(int argc, char **argv)
378{
379	register struct sockaddr_in6 *sin = &sin_m;
380	register struct sockaddr_dl *sdl;
381	register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
382	struct addrinfo hints, *res;
383	int gai_error;
384	u_char *ea;
385	char *host = argv[0], *eaddr = argv[1];
386
387	getsocket();
388	argc -= 2;
389	argv += 2;
390	sdl_m = blank_sdl;
391	sin_m = blank_sin;
392
393	bzero(&hints, sizeof(hints));
394	hints.ai_family = AF_INET6;
395	gai_error = getaddrinfo(host, NULL, &hints, &res);
396	if (gai_error) {
397		fprintf(stderr, "ndp: %s: %s\n", host,
398			gai_strerror(gai_error));
399		return 1;
400	}
401	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
402	sin->sin6_scope_id =
403	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
404	ea = (u_char *)LLADDR(&sdl_m);
405	if (ndp_ether_aton(eaddr, ea) == 0)
406		sdl_m.sdl_alen = 6;
407	flags = expire_time = 0;
408	while (argc-- > 0) {
409		if (strncmp(argv[0], "temp", 4) == 0) {
410			struct timeval now;
411
412			gettimeofday(&now, 0);
413			expire_time = now.tv_sec + 20 * 60;
414		} else if (strncmp(argv[0], "proxy", 5) == 0)
415			flags |= RTF_ANNOUNCE;
416		argv++;
417	}
418	if (rtmsg(RTM_GET) < 0) {
419		errx(1, "RTM_GET(%s) failed", host);
420		/* NOTREACHED */
421	}
422	sin = (struct sockaddr_in6 *)(rtm + 1);
423	sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
424	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
425		if (sdl->sdl_family == AF_LINK &&
426		    !(rtm->rtm_flags & RTF_GATEWAY)) {
427			switch (sdl->sdl_type) {
428			case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
429			case IFT_ISO88024: case IFT_ISO88025:
430			case IFT_L2VLAN: case IFT_BRIDGE:
431				goto overwrite;
432			}
433		}
434		fprintf(stderr, "set: cannot configure a new entry\n");
435		return 1;
436	}
437
438overwrite:
439	if (sdl->sdl_family != AF_LINK) {
440		printf("cannot intuit interface index and type for %s\n", host);
441		return (1);
442	}
443	sdl_m.sdl_type = sdl->sdl_type;
444	sdl_m.sdl_index = sdl->sdl_index;
445	return (rtmsg(RTM_ADD));
446}
447
448/*
449 * Display an individual neighbor cache entry
450 */
451void
452get(char *host)
453{
454	struct sockaddr_in6 *sin = &sin_m;
455	struct addrinfo hints, *res;
456	int gai_error;
457
458	sin_m = blank_sin;
459	bzero(&hints, sizeof(hints));
460	hints.ai_family = AF_INET6;
461	gai_error = getaddrinfo(host, NULL, &hints, &res);
462	if (gai_error) {
463		fprintf(stderr, "ndp: %s: %s\n", host,
464		    gai_strerror(gai_error));
465		return;
466	}
467	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
468	sin->sin6_scope_id =
469	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
470	dump(sin, 0);
471	if (found_entry == 0) {
472		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
473		    sizeof(host_buf), NULL ,0,
474		    (nflag ? NI_NUMERICHOST : 0));
475		printf("%s (%s) -- no entry\n", host, host_buf);
476		exit(1);
477	}
478}
479
480/*
481 * Delete a neighbor cache entry
482 */
483int
484delete(char *host)
485{
486	struct sockaddr_in6 *sin = &sin_m;
487	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
488	register char *cp = m_rtmsg.m_space;
489	struct sockaddr_dl *sdl;
490	struct addrinfo hints, *res;
491	int gai_error;
492
493	getsocket();
494	sin_m = blank_sin;
495
496	bzero(&hints, sizeof(hints));
497	hints.ai_family = AF_INET6;
498	gai_error = getaddrinfo(host, NULL, &hints, &res);
499	if (gai_error) {
500		fprintf(stderr, "ndp: %s: %s\n", host,
501		    gai_strerror(gai_error));
502		return 1;
503	}
504	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
505	sin->sin6_scope_id =
506	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
507	if (rtmsg(RTM_GET) < 0) {
508		errx(1, "RTM_GET(%s) failed", host);
509		/* NOTREACHED */
510	}
511	sin = (struct sockaddr_in6 *)(rtm + 1);
512	sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
513	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
514		if (sdl->sdl_family == AF_LINK &&
515		    !(rtm->rtm_flags & RTF_GATEWAY)) {
516			goto delete;
517		}
518		fprintf(stderr, "delete: cannot delete non-NDP entry\n");
519		return 1;
520	}
521
522delete:
523	if (sdl->sdl_family != AF_LINK) {
524		printf("cannot locate %s\n", host);
525		return (1);
526	}
527        /*
528         * need to reinit the field because it has rt_key
529         * but we want the actual address
530         */
531	NEXTADDR(RTA_DST, sin_m);
532	rtm->rtm_flags |= RTF_LLDATA;
533	if (rtmsg(RTM_DELETE) == 0) {
534		getnameinfo((struct sockaddr *)sin,
535		    sin->sin6_len, host_buf,
536		    sizeof(host_buf), NULL, 0,
537		    (nflag ? NI_NUMERICHOST : 0));
538		printf("%s (%s) deleted\n", host, host_buf);
539	}
540
541	return 0;
542}
543
544#define W_ADDR	36
545#define W_LL	17
546#define W_IF	6
547
548/*
549 * Dump the entire neighbor cache
550 */
551void
552dump(struct sockaddr_in6 *addr, int cflag)
553{
554	int mib[6];
555	size_t needed;
556	char *lim, *buf, *next;
557	struct rt_msghdr *rtm;
558	struct sockaddr_in6 *sin;
559	struct sockaddr_dl *sdl;
560	extern int h_errno;
561	struct in6_nbrinfo *nbi;
562	struct timeval now;
563	int addrwidth;
564	int llwidth;
565	int ifwidth;
566	char flgbuf[8];
567	char *ifname;
568
569	/* Print header */
570	if (!tflag && !cflag)
571		printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
572		    W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
573		    W_IF, W_IF, "Netif", "Expire", "S", "Flags");
574
575again:;
576	mib[0] = CTL_NET;
577	mib[1] = PF_ROUTE;
578	mib[2] = 0;
579	mib[3] = AF_INET6;
580	mib[4] = NET_RT_FLAGS;
581#ifdef RTF_LLINFO
582	mib[5] = RTF_LLINFO;
583#else
584	mib[5] = 0;
585#endif
586	if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
587		err(1, "sysctl(PF_ROUTE estimate)");
588	if (needed > 0) {
589		if ((buf = malloc(needed)) == NULL)
590			err(1, "malloc");
591		if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
592			err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
593		lim = buf + needed;
594	} else
595		buf = lim = NULL;
596
597	for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
598		int isrouter = 0, prbs = 0;
599
600		rtm = (struct rt_msghdr *)next;
601		sin = (struct sockaddr_in6 *)(rtm + 1);
602		sdl = (struct sockaddr_dl *)((char *)sin + ALIGN(sin->sin6_len));
603
604		/*
605		 * Some OSes can produce a route that has the LINK flag but
606		 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
607		 * and BSD/OS, where xx is not the interface identifier on
608		 * lo0).  Such routes entry would annoy getnbrinfo() below,
609		 * so we skip them.
610		 * XXX: such routes should have the GATEWAY flag, not the
611		 * LINK flag.  However, there is rotten routing software
612		 * that advertises all routes that have the GATEWAY flag.
613		 * Thus, KAME kernel intentionally does not set the LINK flag.
614		 * What is to be fixed is not ndp, but such routing software
615		 * (and the kernel workaround)...
616		 */
617		if (sdl->sdl_family != AF_LINK)
618			continue;
619
620		if (!(rtm->rtm_flags & RTF_HOST))
621			continue;
622
623		if (addr) {
624			if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr,
625			    &sin->sin6_addr) == 0 ||
626			    addr->sin6_scope_id != sin->sin6_scope_id)
627				continue;
628			found_entry = 1;
629		} else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
630			continue;
631		if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
632		    IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
633			/* XXX: should scope id be filled in the kernel? */
634			if (sin->sin6_scope_id == 0)
635				sin->sin6_scope_id = sdl->sdl_index;
636		}
637		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
638		    sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
639		if (cflag) {
640#ifdef RTF_WASCLONED
641			if (rtm->rtm_flags & RTF_WASCLONED)
642				delete(host_buf);
643#elif defined(RTF_CLONED)
644			if (rtm->rtm_flags & RTF_CLONED)
645				delete(host_buf);
646#else
647			delete(host_buf);
648#endif
649			continue;
650		}
651		gettimeofday(&now, 0);
652		if (tflag)
653			ts_print(&now);
654
655		addrwidth = strlen(host_buf);
656		if (addrwidth < W_ADDR)
657			addrwidth = W_ADDR;
658		llwidth = strlen(ether_str(sdl));
659		if (W_ADDR + W_LL - addrwidth > llwidth)
660			llwidth = W_ADDR + W_LL - addrwidth;
661		ifname = if_indextoname(sdl->sdl_index, ifix_buf);
662		if (!ifname)
663			ifname = "?";
664		ifwidth = strlen(ifname);
665		if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
666			ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
667
668		printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
669		    llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
670
671		/* Print neighbor discovery specific informations */
672		nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
673		if (nbi) {
674			if (nbi->expire > now.tv_sec) {
675				printf(" %-9.9s",
676				    sec2str(nbi->expire - now.tv_sec));
677			} else if (nbi->expire == 0)
678				printf(" %-9.9s", "permanent");
679			else
680				printf(" %-9.9s", "expired");
681
682			switch (nbi->state) {
683			case ND6_LLINFO_NOSTATE:
684				 printf(" N");
685				 break;
686#ifdef ND6_LLINFO_WAITDELETE
687			case ND6_LLINFO_WAITDELETE:
688				 printf(" W");
689				 break;
690#endif
691			case ND6_LLINFO_INCOMPLETE:
692				 printf(" I");
693				 break;
694			case ND6_LLINFO_REACHABLE:
695				 printf(" R");
696				 break;
697			case ND6_LLINFO_STALE:
698				 printf(" S");
699				 break;
700			case ND6_LLINFO_DELAY:
701				 printf(" D");
702				 break;
703			case ND6_LLINFO_PROBE:
704				 printf(" P");
705				 break;
706			default:
707				 printf(" ?");
708				 break;
709			}
710
711			isrouter = nbi->isrouter;
712			prbs = nbi->asked;
713		} else {
714			warnx("failed to get neighbor information");
715			printf("  ");
716		}
717
718		/*
719		 * other flags. R: router, P: proxy, W: ??
720		 */
721		if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
722			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
723			    isrouter ? "R" : "",
724			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
725		} else {
726			sin = (struct sockaddr_in6 *)
727			    (sdl->sdl_len + (char *)sdl);
728#if 0	/* W and P are mystery even for us */
729			snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
730			    isrouter ? "R" : "",
731			    !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
732			    (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
733			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
734#else
735			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
736			    isrouter ? "R" : "",
737			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
738#endif
739		}
740		printf(" %s", flgbuf);
741
742		if (prbs)
743			printf(" %d", prbs);
744
745		printf("\n");
746	}
747	if (buf != NULL)
748		free(buf);
749
750	if (repeat) {
751		printf("\n");
752		fflush(stdout);
753		sleep(repeat);
754		goto again;
755	}
756}
757
758static struct in6_nbrinfo *
759getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
760{
761	static struct in6_nbrinfo nbi;
762	int s;
763
764	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
765		err(1, "socket");
766
767	bzero(&nbi, sizeof(nbi));
768	if_indextoname(ifindex, nbi.ifname);
769	nbi.addr = *addr;
770	if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
771		if (warning)
772			warn("ioctl(SIOCGNBRINFO_IN6)");
773		close(s);
774		return(NULL);
775	}
776
777	close(s);
778	return(&nbi);
779}
780
781static char *
782ether_str(struct sockaddr_dl *sdl)
783{
784	static char hbuf[NI_MAXHOST];
785	char *cp;
786
787	if (sdl->sdl_alen == ETHER_ADDR_LEN) {
788		strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
789		    sizeof(hbuf));
790	} else if (sdl->sdl_alen) {
791		int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
792		snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
793	} else
794		snprintf(hbuf, sizeof(hbuf), "(incomplete)");
795
796	return(hbuf);
797}
798
799int
800ndp_ether_aton(char *a, u_char *n)
801{
802	int i, o[6];
803
804	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
805	    &o[3], &o[4], &o[5]);
806	if (i != 6) {
807		fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
808		return (1);
809	}
810	for (i = 0; i < 6; i++)
811		n[i] = o[i];
812	return (0);
813}
814
815void
816usage()
817{
818	printf("usage: ndp [-nt] hostname\n");
819	printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
820	printf("       ndp [-nt] -A wait\n");
821	printf("       ndp [-nt] -d hostname\n");
822	printf("       ndp [-nt] -f filename\n");
823	printf("       ndp [-nt] -i interface [flags...]\n");
824#ifdef SIOCSDEFIFACE_IN6
825	printf("       ndp [-nt] -I [interface|delete]\n");
826#endif
827	printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
828	exit(1);
829}
830
831int
832rtmsg(int cmd)
833{
834	static int seq;
835	int rlen;
836	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
837	register char *cp = m_rtmsg.m_space;
838	register int l;
839
840	errno = 0;
841	if (cmd == RTM_DELETE)
842		goto doit;
843	bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
844	rtm->rtm_flags = flags;
845	rtm->rtm_version = RTM_VERSION;
846
847	switch (cmd) {
848	default:
849		fprintf(stderr, "ndp: internal wrong cmd\n");
850		exit(1);
851	case RTM_ADD:
852		rtm->rtm_addrs |= RTA_GATEWAY;
853		if (expire_time) {
854			rtm->rtm_rmx.rmx_expire = expire_time;
855			rtm->rtm_inits = RTV_EXPIRE;
856		}
857		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
858#if 0 /* we don't support ipv6addr/128 type proxying */
859		if (rtm->rtm_flags & RTF_ANNOUNCE) {
860			rtm->rtm_flags &= ~RTF_HOST;
861			rtm->rtm_addrs |= RTA_NETMASK;
862		}
863#endif
864		/* FALLTHROUGH */
865	case RTM_GET:
866		rtm->rtm_addrs |= RTA_DST;
867	}
868
869	NEXTADDR(RTA_DST, sin_m);
870	NEXTADDR(RTA_GATEWAY, sdl_m);
871#if 0 /* we don't support ipv6addr/128 type proxying */
872	memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
873	NEXTADDR(RTA_NETMASK, so_mask);
874#endif
875
876	rtm->rtm_msglen = cp - (char *)&m_rtmsg;
877doit:
878	l = rtm->rtm_msglen;
879	rtm->rtm_seq = ++seq;
880	rtm->rtm_type = cmd;
881	if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
882		if (errno != ESRCH || cmd != RTM_DELETE) {
883			err(1, "writing to routing socket");
884			/* NOTREACHED */
885		}
886	}
887	do {
888		l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
889	} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
890	if (l < 0)
891		(void) fprintf(stderr, "ndp: read from routing socket: %s\n",
892		    strerror(errno));
893	return (0);
894}
895
896void
897ifinfo(char *ifname, int argc, char **argv)
898{
899	struct in6_ndireq nd;
900	int i, s;
901	u_int32_t newflags;
902#ifdef IPV6CTL_USETEMPADDR
903	u_int8_t nullbuf[8];
904#endif
905
906	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
907		err(1, "socket");
908		/* NOTREACHED */
909	}
910	bzero(&nd, sizeof(nd));
911	strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
912	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
913		err(1, "ioctl(SIOCGIFINFO_IN6)");
914		/* NOTREACHED */
915	}
916#define ND nd.ndi
917	newflags = ND.flags;
918	for (i = 0; i < argc; i++) {
919		int clear = 0;
920		char *cp = argv[i];
921
922		if (*cp == '-') {
923			clear = 1;
924			cp++;
925		}
926
927#define SETFLAG(s, f) \
928	do {\
929		if (strcmp(cp, (s)) == 0) {\
930			if (clear)\
931				newflags &= ~(f);\
932			else\
933				newflags |= (f);\
934		}\
935	} while (0)
936/*
937 * XXX: this macro is not 100% correct, in that it matches "nud" against
938 *      "nudbogus".  But we just let it go since this is minor.
939 */
940#define SETVALUE(f, v) \
941	do { \
942		char *valptr; \
943		unsigned long newval; \
944		v = 0; /* unspecified */ \
945		if (strncmp(cp, f, strlen(f)) == 0) { \
946			valptr = strchr(cp, '='); \
947			if (valptr == NULL) \
948				err(1, "syntax error in %s field", (f)); \
949			errno = 0; \
950			newval = strtoul(++valptr, NULL, 0); \
951			if (errno) \
952				err(1, "syntax error in %s's value", (f)); \
953			v = newval; \
954		} \
955	} while (0)
956
957		SETFLAG("disabled", ND6_IFF_IFDISABLED);
958		SETFLAG("nud", ND6_IFF_PERFORMNUD);
959#ifdef ND6_IFF_ACCEPT_RTADV
960		SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
961#endif
962#ifdef ND6_IFF_AUTO_LINKLOCAL
963		SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
964#endif
965#ifdef ND6_IFF_NO_PREFER_IFACE
966		SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
967#endif
968		SETVALUE("basereachable", ND.basereachable);
969		SETVALUE("retrans", ND.retrans);
970		SETVALUE("curhlim", ND.chlim);
971
972		ND.flags = newflags;
973		if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
974			err(1, "ioctl(SIOCSIFINFO_IN6)");
975			/* NOTREACHED */
976		}
977#undef SETFLAG
978#undef SETVALUE
979	}
980
981	if (!ND.initialized) {
982		errx(1, "%s: not initialized yet", ifname);
983		/* NOTREACHED */
984	}
985
986	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
987		err(1, "ioctl(SIOCGIFINFO_IN6)");
988		/* NOTREACHED */
989	}
990	printf("linkmtu=%d", ND.linkmtu);
991	printf(", maxmtu=%d", ND.maxmtu);
992	printf(", curhlim=%d", ND.chlim);
993	printf(", basereachable=%ds%dms",
994	    ND.basereachable / 1000, ND.basereachable % 1000);
995	printf(", reachable=%ds", ND.reachable);
996	printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
997#ifdef IPV6CTL_USETEMPADDR
998	memset(nullbuf, 0, sizeof(nullbuf));
999	if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1000		int j;
1001		u_int8_t *rbuf;
1002
1003		for (i = 0; i < 3; i++) {
1004			switch (i) {
1005			case 0:
1006				printf("\nRandom seed(0): ");
1007				rbuf = ND.randomseed0;
1008				break;
1009			case 1:
1010				printf("\nRandom seed(1): ");
1011				rbuf = ND.randomseed1;
1012				break;
1013			case 2:
1014				printf("\nRandom ID:      ");
1015				rbuf = ND.randomid;
1016				break;
1017			default:
1018				errx(1, "impossible case for tempaddr display");
1019			}
1020			for (j = 0; j < 8; j++)
1021				printf("%02x", rbuf[j]);
1022		}
1023	}
1024#endif
1025	if (ND.flags) {
1026		printf("\nFlags: ");
1027#ifdef ND6_IFF_IFDISABLED
1028		if ((ND.flags & ND6_IFF_IFDISABLED))
1029			printf("disabled ");
1030#endif
1031		if ((ND.flags & ND6_IFF_PERFORMNUD))
1032			printf("nud ");
1033#ifdef ND6_IFF_ACCEPT_RTADV
1034		if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1035			printf("accept_rtadv ");
1036#endif
1037#ifdef ND6_IFF_AUTO_LINKLOCAL
1038		if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1039			printf("auto_linklocal ");
1040#endif
1041#ifdef ND6_IFF_NO_PREFER_IFACE
1042		if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1043			printf("no_prefer_iface ");
1044#endif
1045	}
1046	putc('\n', stdout);
1047#undef ND
1048
1049	close(s);
1050}
1051
1052#ifndef ND_RA_FLAG_RTPREF_MASK	/* XXX: just for compilation on *BSD release */
1053#define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
1054#endif
1055
1056void
1057rtrlist()
1058{
1059#ifdef ICMPV6CTL_ND6_DRLIST
1060	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1061	char *buf;
1062	struct in6_defrouter *p, *ep;
1063	size_t l;
1064	struct timeval now;
1065
1066	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1067		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1068		/*NOTREACHED*/
1069	}
1070	if (l == 0)
1071		return;
1072	buf = malloc(l);
1073	if (!buf) {
1074		err(1, "malloc");
1075		/*NOTREACHED*/
1076	}
1077	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1078		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1079		/*NOTREACHED*/
1080	}
1081
1082	ep = (struct in6_defrouter *)(buf + l);
1083	for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1084		int rtpref;
1085
1086		if (getnameinfo((struct sockaddr *)&p->rtaddr,
1087		    p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1088		    (nflag ? NI_NUMERICHOST : 0)) != 0)
1089			strlcpy(host_buf, "?", sizeof(host_buf));
1090
1091		printf("%s if=%s", host_buf,
1092		    if_indextoname(p->if_index, ifix_buf));
1093		printf(", flags=%s%s",
1094		    p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1095		    p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1096		rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1097		printf(", pref=%s", rtpref_str[rtpref]);
1098
1099		gettimeofday(&now, 0);
1100		if (p->expire == 0)
1101			printf(", expire=Never\n");
1102		else
1103			printf(", expire=%s\n",
1104			    sec2str(p->expire - now.tv_sec));
1105	}
1106	free(buf);
1107#else
1108	struct in6_drlist dr;
1109	int s, i;
1110	struct timeval now;
1111
1112	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1113		err(1, "socket");
1114		/* NOTREACHED */
1115	}
1116	bzero(&dr, sizeof(dr));
1117	strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1118	if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1119		err(1, "ioctl(SIOCGDRLST_IN6)");
1120		/* NOTREACHED */
1121	}
1122#define DR dr.defrouter[i]
1123	for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1124		struct sockaddr_in6 sin6;
1125
1126		bzero(&sin6, sizeof(sin6));
1127		sin6.sin6_family = AF_INET6;
1128		sin6.sin6_len = sizeof(sin6);
1129		sin6.sin6_addr = DR.rtaddr;
1130		getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1131		    sizeof(host_buf), NULL, 0,
1132		    (nflag ? NI_NUMERICHOST : 0));
1133
1134		printf("%s if=%s", host_buf,
1135		    if_indextoname(DR.if_index, ifix_buf));
1136		printf(", flags=%s%s",
1137		    DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1138		    DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1139		gettimeofday(&now, 0);
1140		if (DR.expire == 0)
1141			printf(", expire=Never\n");
1142		else
1143			printf(", expire=%s\n",
1144			    sec2str(DR.expire - now.tv_sec));
1145	}
1146#undef DR
1147	close(s);
1148#endif
1149}
1150
1151void
1152plist()
1153{
1154#ifdef ICMPV6CTL_ND6_PRLIST
1155	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1156	char *buf;
1157	struct in6_prefix *p, *ep, *n;
1158	struct sockaddr_in6 *advrtr;
1159	size_t l;
1160	struct timeval now;
1161	const int niflags = NI_NUMERICHOST;
1162	int ninflags = nflag ? NI_NUMERICHOST : 0;
1163	char namebuf[NI_MAXHOST];
1164
1165	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1166		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1167		/*NOTREACHED*/
1168	}
1169	buf = malloc(l);
1170	if (!buf) {
1171		err(1, "malloc");
1172		/*NOTREACHED*/
1173	}
1174	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1175		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1176		/*NOTREACHED*/
1177	}
1178
1179	ep = (struct in6_prefix *)(buf + l);
1180	for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1181		advrtr = (struct sockaddr_in6 *)(p + 1);
1182		n = (struct in6_prefix *)&advrtr[p->advrtrs];
1183
1184		if (getnameinfo((struct sockaddr *)&p->prefix,
1185		    p->prefix.sin6_len, namebuf, sizeof(namebuf),
1186		    NULL, 0, niflags) != 0)
1187			strlcpy(namebuf, "?", sizeof(namebuf));
1188		printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1189		    if_indextoname(p->if_index, ifix_buf));
1190
1191		gettimeofday(&now, 0);
1192		/*
1193		 * meaning of fields, especially flags, is very different
1194		 * by origin.  notify the difference to the users.
1195		 */
1196		printf("flags=%s%s%s%s%s",
1197		    p->raflags.onlink ? "L" : "",
1198		    p->raflags.autonomous ? "A" : "",
1199		    (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1200		    (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1201#ifdef NDPRF_HOME
1202		    (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1203#else
1204		    ""
1205#endif
1206		    );
1207		if (p->vltime == ND6_INFINITE_LIFETIME)
1208			printf(" vltime=infinity");
1209		else
1210			printf(" vltime=%lu", (unsigned long)p->vltime);
1211		if (p->pltime == ND6_INFINITE_LIFETIME)
1212			printf(", pltime=infinity");
1213		else
1214			printf(", pltime=%lu", (unsigned long)p->pltime);
1215		if (p->expire == 0)
1216			printf(", expire=Never");
1217		else if (p->expire >= now.tv_sec)
1218			printf(", expire=%s",
1219			    sec2str(p->expire - now.tv_sec));
1220		else
1221			printf(", expired");
1222		printf(", ref=%d", p->refcnt);
1223		printf("\n");
1224		/*
1225		 * "advertising router" list is meaningful only if the prefix
1226		 * information is from RA.
1227		 */
1228		if (p->advrtrs) {
1229			int j;
1230			struct sockaddr_in6 *sin6;
1231
1232			sin6 = advrtr;
1233			printf("  advertised by\n");
1234			for (j = 0; j < p->advrtrs; j++) {
1235				struct in6_nbrinfo *nbi;
1236
1237				if (getnameinfo((struct sockaddr *)sin6,
1238				    sin6->sin6_len, namebuf, sizeof(namebuf),
1239				    NULL, 0, ninflags) != 0)
1240					strlcpy(namebuf, "?", sizeof(namebuf));
1241				printf("    %s", namebuf);
1242
1243				nbi = getnbrinfo(&sin6->sin6_addr,
1244				    p->if_index, 0);
1245				if (nbi) {
1246					switch (nbi->state) {
1247					case ND6_LLINFO_REACHABLE:
1248					case ND6_LLINFO_STALE:
1249					case ND6_LLINFO_DELAY:
1250					case ND6_LLINFO_PROBE:
1251						printf(" (reachable)\n");
1252						break;
1253					default:
1254						printf(" (unreachable)\n");
1255					}
1256				} else
1257					printf(" (no neighbor state)\n");
1258				sin6++;
1259			}
1260		} else
1261			printf("  No advertising router\n");
1262	}
1263	free(buf);
1264#else
1265	struct in6_prlist pr;
1266	int s, i;
1267	struct timeval now;
1268
1269	gettimeofday(&now, 0);
1270
1271	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1272		err(1, "socket");
1273		/* NOTREACHED */
1274	}
1275	bzero(&pr, sizeof(pr));
1276	strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1277	if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1278		err(1, "ioctl(SIOCGPRLST_IN6)");
1279		/* NOTREACHED */
1280	}
1281#define PR pr.prefix[i]
1282	for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1283		struct sockaddr_in6 p6;
1284		char namebuf[NI_MAXHOST];
1285		int niflags;
1286
1287#ifdef NDPRF_ONLINK
1288		p6 = PR.prefix;
1289#else
1290		memset(&p6, 0, sizeof(p6));
1291		p6.sin6_family = AF_INET6;
1292		p6.sin6_len = sizeof(p6);
1293		p6.sin6_addr = PR.prefix;
1294#endif
1295		niflags = NI_NUMERICHOST;
1296		if (getnameinfo((struct sockaddr *)&p6,
1297		    sizeof(p6), namebuf, sizeof(namebuf),
1298		    NULL, 0, niflags)) {
1299			warnx("getnameinfo failed");
1300			continue;
1301		}
1302		printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1303		    if_indextoname(PR.if_index, ifix_buf));
1304
1305		gettimeofday(&now, 0);
1306		/*
1307		 * meaning of fields, especially flags, is very different
1308		 * by origin.  notify the difference to the users.
1309		 */
1310#if 0
1311		printf("  %s",
1312		    PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1313#endif
1314#ifdef NDPRF_ONLINK
1315		printf("flags=%s%s%s%s%s",
1316		    PR.raflags.onlink ? "L" : "",
1317		    PR.raflags.autonomous ? "A" : "",
1318		    (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1319		    (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1320#ifdef NDPRF_HOME
1321		    (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1322#else
1323		    ""
1324#endif
1325		    );
1326#else
1327		printf("flags=%s%s",
1328		    PR.raflags.onlink ? "L" : "",
1329		    PR.raflags.autonomous ? "A" : "");
1330#endif
1331		if (PR.vltime == ND6_INFINITE_LIFETIME)
1332			printf(" vltime=infinity");
1333		else
1334			printf(" vltime=%lu", PR.vltime);
1335		if (PR.pltime == ND6_INFINITE_LIFETIME)
1336			printf(", pltime=infinity");
1337		else
1338			printf(", pltime=%lu", PR.pltime);
1339		if (PR.expire == 0)
1340			printf(", expire=Never");
1341		else if (PR.expire >= now.tv_sec)
1342			printf(", expire=%s",
1343			    sec2str(PR.expire - now.tv_sec));
1344		else
1345			printf(", expired");
1346#ifdef NDPRF_ONLINK
1347		printf(", ref=%d", PR.refcnt);
1348#endif
1349#if 0
1350		switch (PR.origin) {
1351		case PR_ORIG_RA:
1352			printf(", origin=RA");
1353			break;
1354		case PR_ORIG_RR:
1355			printf(", origin=RR");
1356			break;
1357		case PR_ORIG_STATIC:
1358			printf(", origin=static");
1359			break;
1360		case PR_ORIG_KERNEL:
1361			printf(", origin=kernel");
1362			break;
1363		default:
1364			printf(", origin=?");
1365			break;
1366		}
1367#endif
1368		printf("\n");
1369		/*
1370		 * "advertising router" list is meaningful only if the prefix
1371		 * information is from RA.
1372		 */
1373		if (0 &&	/* prefix origin is almost obsolted */
1374		    PR.origin != PR_ORIG_RA)
1375			;
1376		else if (PR.advrtrs) {
1377			int j;
1378			printf("  advertised by\n");
1379			for (j = 0; j < PR.advrtrs; j++) {
1380				struct sockaddr_in6 sin6;
1381				struct in6_nbrinfo *nbi;
1382
1383				bzero(&sin6, sizeof(sin6));
1384				sin6.sin6_family = AF_INET6;
1385				sin6.sin6_len = sizeof(sin6);
1386				sin6.sin6_addr = PR.advrtr[j];
1387				sin6.sin6_scope_id = PR.if_index; /* XXX */
1388				getnameinfo((struct sockaddr *)&sin6,
1389				    sin6.sin6_len, host_buf,
1390				    sizeof(host_buf), NULL, 0,
1391				    (nflag ? NI_NUMERICHOST : 0));
1392				printf("    %s", host_buf);
1393
1394				nbi = getnbrinfo(&sin6.sin6_addr,
1395				    PR.if_index, 0);
1396				if (nbi) {
1397					switch (nbi->state) {
1398					case ND6_LLINFO_REACHABLE:
1399					case ND6_LLINFO_STALE:
1400					case ND6_LLINFO_DELAY:
1401					case ND6_LLINFO_PROBE:
1402						 printf(" (reachable)\n");
1403						 break;
1404					default:
1405						 printf(" (unreachable)\n");
1406					}
1407				} else
1408					printf(" (no neighbor state)\n");
1409			}
1410			if (PR.advrtrs > DRLSTSIZ)
1411				printf("    and %d routers\n",
1412				    PR.advrtrs - DRLSTSIZ);
1413		} else
1414			printf("  No advertising router\n");
1415	}
1416#undef PR
1417	close(s);
1418#endif
1419}
1420
1421void
1422pfx_flush()
1423{
1424	char dummyif[IFNAMSIZ+8];
1425	int s;
1426
1427	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1428		err(1, "socket");
1429	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1430	if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1431		err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1432}
1433
1434void
1435rtr_flush()
1436{
1437	char dummyif[IFNAMSIZ+8];
1438	int s;
1439
1440	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1441		err(1, "socket");
1442	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1443	if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1444		err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1445
1446	close(s);
1447}
1448
1449void
1450harmonize_rtr()
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, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1459		err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1460
1461	close(s);
1462}
1463
1464#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
1465static void
1466setdefif(char *ifname)
1467{
1468	struct in6_ndifreq ndifreq;
1469	unsigned int ifindex;
1470
1471	if (strcasecmp(ifname, "delete") == 0)
1472		ifindex = 0;
1473	else {
1474		if ((ifindex = if_nametoindex(ifname)) == 0)
1475			err(1, "failed to resolve i/f index for %s", ifname);
1476	}
1477
1478	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1479		err(1, "socket");
1480
1481	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1482	ndifreq.ifindex = ifindex;
1483
1484	if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1485		err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1486
1487	close(s);
1488}
1489
1490static void
1491getdefif()
1492{
1493	struct in6_ndifreq ndifreq;
1494	char ifname[IFNAMSIZ+8];
1495
1496	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1497		err(1, "socket");
1498
1499	memset(&ndifreq, 0, sizeof(ndifreq));
1500	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1501
1502	if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1503		err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1504
1505	if (ndifreq.ifindex == 0)
1506		printf("No default interface.\n");
1507	else {
1508		if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1509			err(1, "failed to resolve ifname for index %lu",
1510			    ndifreq.ifindex);
1511		printf("ND default interface = %s\n", ifname);
1512	}
1513
1514	close(s);
1515}
1516#endif
1517
1518static char *
1519sec2str(time_t total)
1520{
1521	static char result[256];
1522	int days, hours, mins, secs;
1523	int first = 1;
1524	char *p = result;
1525	char *ep = &result[sizeof(result)];
1526	int n;
1527
1528	days = total / 3600 / 24;
1529	hours = (total / 3600) % 24;
1530	mins = (total / 60) % 60;
1531	secs = total % 60;
1532
1533	if (days) {
1534		first = 0;
1535		n = snprintf(p, ep - p, "%dd", days);
1536		if (n < 0 || n >= ep - p)
1537			return "?";
1538		p += n;
1539	}
1540	if (!first || hours) {
1541		first = 0;
1542		n = snprintf(p, ep - p, "%dh", hours);
1543		if (n < 0 || n >= ep - p)
1544			return "?";
1545		p += n;
1546	}
1547	if (!first || mins) {
1548		first = 0;
1549		n = snprintf(p, ep - p, "%dm", mins);
1550		if (n < 0 || n >= ep - p)
1551			return "?";
1552		p += n;
1553	}
1554	snprintf(p, ep - p, "%ds", secs);
1555
1556	return(result);
1557}
1558
1559/*
1560 * Print the timestamp
1561 * from tcpdump/util.c
1562 */
1563static void
1564ts_print(const struct timeval *tvp)
1565{
1566	int s;
1567
1568	/* Default */
1569	s = (tvp->tv_sec + thiszone) % 86400;
1570	(void)printf("%02d:%02d:%02d.%06u ",
1571	    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1572}
1573
1574#undef NEXTADDR
1575