ndp.c revision 265778 
1/*	$FreeBSD: head/usr.sbin/ndp/ndp.c 265778 2014-05-09 14:24:02Z melifaro $	*/
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 <ctype.h>
101#include <netdb.h>
102#include <errno.h>
103#include <nlist.h>
104#include <stdio.h>
105#include <string.h>
106#include <paths.h>
107#include <err.h>
108#include <stdlib.h>
109#include <fcntl.h>
110#include <unistd.h>
111#include "gmt2local.h"
112
113#define NEXTADDR(w, s) \
114	if (rtm->rtm_addrs & (w)) { \
115		bcopy((char *)&s, cp, sizeof(s)); cp += SA_SIZE(&s);}
116
117
118static pid_t pid;
119static int nflag;
120static int tflag;
121static int32_t thiszone;	/* time difference with gmt */
122static int s = -1;
123static int repeat = 0;
124
125char ntop_buf[INET6_ADDRSTRLEN];	/* inet_ntop() */
126char host_buf[NI_MAXHOST];		/* getnameinfo() */
127char ifix_buf[IFNAMSIZ];		/* if_indextoname() */
128
129int main(int, char **);
130static int file(char *);
131void getsocket(void);
132int set(int, char **);
133void get(char *);
134int delete(char *);
135void dump(struct sockaddr_in6 *, int);
136static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
137static char *ether_str(struct sockaddr_dl *);
138int ndp_ether_aton(char *, u_char *);
139void usage(void);
140int rtmsg(int);
141void ifinfo(char *, int, char **);
142void rtrlist(void);
143void plist(void);
144void pfx_flush(void);
145void rtr_flush(void);
146void harmonize_rtr(void);
147#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
148static void getdefif(void);
149static void setdefif(char *);
150#endif
151static char *sec2str(time_t);
152static void ts_print(const struct timeval *);
153
154#ifdef ICMPV6CTL_ND6_DRLIST
155static char *rtpref_str[] = {
156	"medium",		/* 00 */
157	"high",			/* 01 */
158	"rsv",			/* 10 */
159	"low"			/* 11 */
160};
161#endif
162
163int mode = 0;
164char *arg = NULL;
165
166int
167main(int argc, char **argv)
168{
169	int ch;
170
171	pid = getpid();
172	thiszone = gmt2local(0);
173	while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
174		switch (ch) {
175		case 'a':
176		case 'c':
177		case 'p':
178		case 'r':
179		case 'H':
180		case 'P':
181		case 'R':
182		case 's':
183		case 'I':
184			if (mode) {
185				usage();
186				/*NOTREACHED*/
187			}
188			mode = ch;
189			arg = NULL;
190			break;
191		case 'd':
192		case 'f':
193			exit(file(optarg) ? 1 : 0);
194		case 'i':
195			if (mode) {
196				usage();
197				/*NOTREACHED*/
198			}
199			mode = ch;
200			arg = optarg;
201			break;
202		case 'n':
203			nflag = 1;
204			break;
205		case 't':
206			tflag = 1;
207			break;
208		case 'A':
209			if (mode) {
210				usage();
211				/*NOTREACHED*/
212			}
213			mode = 'a';
214			repeat = atoi(optarg);
215			if (repeat < 0) {
216				usage();
217				/*NOTREACHED*/
218			}
219			break;
220		default:
221			usage();
222		}
223
224	argc -= optind;
225	argv += optind;
226
227	switch (mode) {
228	case 'a':
229	case 'c':
230		if (argc != 0) {
231			usage();
232			/*NOTREACHED*/
233		}
234		dump(0, mode == 'c');
235		break;
236	case 'd':
237		if (argc != 0) {
238			usage();
239			/*NOTREACHED*/
240		}
241		delete(arg);
242		break;
243	case 'I':
244#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
245		if (argc > 1) {
246			usage();
247			/*NOTREACHED*/
248		} else if (argc == 1) {
249			if (strcmp(*argv, "delete") == 0 ||
250			    if_nametoindex(*argv))
251				setdefif(*argv);
252			else
253				errx(1, "invalid interface %s", *argv);
254		}
255		getdefif(); /* always call it to print the result */
256		break;
257#else
258		errx(1, "not supported yet");
259		/*NOTREACHED*/
260#endif
261	case 'p':
262		if (argc != 0) {
263			usage();
264			/*NOTREACHED*/
265		}
266		plist();
267		break;
268	case 'i':
269		ifinfo(arg, argc, argv);
270		break;
271	case 'r':
272		if (argc != 0) {
273			usage();
274			/*NOTREACHED*/
275		}
276		rtrlist();
277		break;
278	case 's':
279		if (argc < 2 || argc > 4)
280			usage();
281		exit(set(argc, argv) ? 1 : 0);
282	case 'H':
283		if (argc != 0) {
284			usage();
285			/*NOTREACHED*/
286		}
287		harmonize_rtr();
288		break;
289	case 'P':
290		if (argc != 0) {
291			usage();
292			/*NOTREACHED*/
293		}
294		pfx_flush();
295		break;
296	case 'R':
297		if (argc != 0) {
298			usage();
299			/*NOTREACHED*/
300		}
301		rtr_flush();
302		break;
303	case 0:
304		if (argc != 1) {
305			usage();
306			/*NOTREACHED*/
307		}
308		get(argv[0]);
309		break;
310	}
311	exit(0);
312}
313
314/*
315 * Process a file to set standard ndp entries
316 */
317static int
318file(char *name)
319{
320	FILE *fp;
321	int i, retval;
322	char line[100], arg[5][50], *args[5], *p;
323
324	if ((fp = fopen(name, "r")) == NULL)
325		err(1, "cannot open %s", name);
326	args[0] = &arg[0][0];
327	args[1] = &arg[1][0];
328	args[2] = &arg[2][0];
329	args[3] = &arg[3][0];
330	args[4] = &arg[4][0];
331	retval = 0;
332	while (fgets(line, sizeof(line), fp) != NULL) {
333		if ((p = strchr(line, '#')) != NULL)
334			*p = '\0';
335		for (p = line; isblank(*p); p++);
336		if (*p == '\n' || *p == '\0')
337			continue;
338		i = sscanf(line, "%49s %49s %49s %49s %49s",
339		    arg[0], arg[1], arg[2], arg[3], arg[4]);
340		if (i < 2) {
341			warnx("bad line: %s", line);
342			retval = 1;
343			continue;
344		}
345		if (set(i, args))
346			retval = 1;
347	}
348	fclose(fp);
349	return (retval);
350}
351
352void
353getsocket()
354{
355	if (s < 0) {
356		s = socket(PF_ROUTE, SOCK_RAW, 0);
357		if (s < 0) {
358			err(1, "socket");
359			/* NOTREACHED */
360		}
361	}
362}
363
364struct	sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
365struct	sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
366struct	sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
367time_t	expire_time;
368int	flags, found_entry;
369struct	{
370	struct	rt_msghdr m_rtm;
371	char	m_space[512];
372}	m_rtmsg;
373
374/*
375 * Set an individual neighbor cache entry
376 */
377int
378set(int argc, char **argv)
379{
380	register struct sockaddr_in6 *sin = &sin_m;
381	register struct sockaddr_dl *sdl;
382	register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
383	struct addrinfo hints, *res;
384	int gai_error;
385	u_char *ea;
386	char *host = argv[0], *eaddr = argv[1];
387
388	getsocket();
389	argc -= 2;
390	argv += 2;
391	sdl_m = blank_sdl;
392	sin_m = blank_sin;
393
394	bzero(&hints, sizeof(hints));
395	hints.ai_family = AF_INET6;
396	gai_error = getaddrinfo(host, NULL, &hints, &res);
397	if (gai_error) {
398		fprintf(stderr, "ndp: %s: %s\n", host,
399			gai_strerror(gai_error));
400		return 1;
401	}
402	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
403	sin->sin6_scope_id =
404	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
405	ea = (u_char *)LLADDR(&sdl_m);
406	if (ndp_ether_aton(eaddr, ea) == 0)
407		sdl_m.sdl_alen = 6;
408	flags = expire_time = 0;
409	while (argc-- > 0) {
410		if (strncmp(argv[0], "temp", 4) == 0) {
411			struct timeval now;
412
413			gettimeofday(&now, 0);
414			expire_time = now.tv_sec + 20 * 60;
415		} else if (strncmp(argv[0], "proxy", 5) == 0)
416			flags |= RTF_ANNOUNCE;
417		argv++;
418	}
419	if (rtmsg(RTM_GET) < 0) {
420		errx(1, "RTM_GET(%s) failed", host);
421		/* NOTREACHED */
422	}
423	sin = (struct sockaddr_in6 *)(rtm + 1);
424	sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
425	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
426		if (sdl->sdl_family == AF_LINK &&
427		    !(rtm->rtm_flags & RTF_GATEWAY)) {
428			switch (sdl->sdl_type) {
429			case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
430			case IFT_ISO88024: case IFT_ISO88025:
431			case IFT_L2VLAN: case IFT_BRIDGE:
432				goto overwrite;
433			}
434		}
435		fprintf(stderr, "set: cannot configure a new entry\n");
436		return 1;
437	}
438
439overwrite:
440	if (sdl->sdl_family != AF_LINK) {
441		printf("cannot intuit interface index and type for %s\n", host);
442		return (1);
443	}
444	sdl_m.sdl_type = sdl->sdl_type;
445	sdl_m.sdl_index = sdl->sdl_index;
446	return (rtmsg(RTM_ADD));
447}
448
449/*
450 * Display an individual neighbor cache entry
451 */
452void
453get(char *host)
454{
455	struct sockaddr_in6 *sin = &sin_m;
456	struct addrinfo hints, *res;
457	int gai_error;
458
459	sin_m = blank_sin;
460	bzero(&hints, sizeof(hints));
461	hints.ai_family = AF_INET6;
462	gai_error = getaddrinfo(host, NULL, &hints, &res);
463	if (gai_error) {
464		fprintf(stderr, "ndp: %s: %s\n", host,
465		    gai_strerror(gai_error));
466		return;
467	}
468	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
469	sin->sin6_scope_id =
470	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
471	dump(sin, 0);
472	if (found_entry == 0) {
473		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
474		    sizeof(host_buf), NULL ,0,
475		    (nflag ? NI_NUMERICHOST : 0));
476		printf("%s (%s) -- no entry\n", host, host_buf);
477		exit(1);
478	}
479}
480
481/*
482 * Delete a neighbor cache entry
483 */
484int
485delete(char *host)
486{
487	struct sockaddr_in6 *sin = &sin_m;
488	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
489	register char *cp = m_rtmsg.m_space;
490	struct sockaddr_dl *sdl;
491	struct addrinfo hints, *res;
492	int gai_error;
493
494	getsocket();
495	sin_m = blank_sin;
496
497	bzero(&hints, sizeof(hints));
498	hints.ai_family = AF_INET6;
499	gai_error = getaddrinfo(host, NULL, &hints, &res);
500	if (gai_error) {
501		fprintf(stderr, "ndp: %s: %s\n", host,
502		    gai_strerror(gai_error));
503		return 1;
504	}
505	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
506	sin->sin6_scope_id =
507	    ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
508	if (rtmsg(RTM_GET) < 0) {
509		errx(1, "RTM_GET(%s) failed", host);
510		/* NOTREACHED */
511	}
512	sin = (struct sockaddr_in6 *)(rtm + 1);
513	sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
514	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
515		if (sdl->sdl_family == AF_LINK &&
516		    !(rtm->rtm_flags & RTF_GATEWAY)) {
517			goto delete;
518		}
519		fprintf(stderr, "delete: cannot delete non-NDP entry\n");
520		return 1;
521	}
522
523delete:
524	if (sdl->sdl_family != AF_LINK) {
525		printf("cannot locate %s\n", host);
526		return (1);
527	}
528        /*
529         * need to reinit the field because it has rt_key
530         * but we want the actual address
531         */
532	NEXTADDR(RTA_DST, sin_m);
533	rtm->rtm_flags |= RTF_LLDATA;
534	if (rtmsg(RTM_DELETE) == 0) {
535		getnameinfo((struct sockaddr *)sin,
536		    sin->sin6_len, host_buf,
537		    sizeof(host_buf), NULL, 0,
538		    (nflag ? NI_NUMERICHOST : 0));
539		printf("%s (%s) deleted\n", host, host_buf);
540	}
541
542	return 0;
543}
544
545#define W_ADDR	36
546#define W_LL	17
547#define W_IF	6
548
549/*
550 * Dump the entire neighbor cache
551 */
552void
553dump(struct sockaddr_in6 *addr, int cflag)
554{
555	int mib[6];
556	size_t needed;
557	char *lim, *buf, *next;
558	struct rt_msghdr *rtm;
559	struct sockaddr_in6 *sin;
560	struct sockaddr_dl *sdl;
561	extern int h_errno;
562	struct in6_nbrinfo *nbi;
563	struct timeval now;
564	int addrwidth;
565	int llwidth;
566	int ifwidth;
567	char flgbuf[8];
568	char *ifname;
569
570	/* Print header */
571	if (!tflag && !cflag)
572		printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
573		    W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
574		    W_IF, W_IF, "Netif", "Expire", "S", "Flags");
575
576again:;
577	mib[0] = CTL_NET;
578	mib[1] = PF_ROUTE;
579	mib[2] = 0;
580	mib[3] = AF_INET6;
581	mib[4] = NET_RT_FLAGS;
582#ifdef RTF_LLINFO
583	mib[5] = RTF_LLINFO;
584#else
585	mib[5] = 0;
586#endif
587	if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
588		err(1, "sysctl(PF_ROUTE estimate)");
589	if (needed > 0) {
590		if ((buf = malloc(needed)) == NULL)
591			err(1, "malloc");
592		if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
593			err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
594		lim = buf + needed;
595	} else
596		buf = lim = NULL;
597
598	for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
599		int isrouter = 0, prbs = 0;
600
601		rtm = (struct rt_msghdr *)next;
602		sin = (struct sockaddr_in6 *)(rtm + 1);
603		sdl = (struct sockaddr_dl *)((char *)sin + ALIGN(sin->sin6_len));
604
605		/*
606		 * Some OSes can produce a route that has the LINK flag but
607		 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
608		 * and BSD/OS, where xx is not the interface identifier on
609		 * lo0).  Such routes entry would annoy getnbrinfo() below,
610		 * so we skip them.
611		 * XXX: such routes should have the GATEWAY flag, not the
612		 * LINK flag.  However, there is rotten routing software
613		 * that advertises all routes that have the GATEWAY flag.
614		 * Thus, KAME kernel intentionally does not set the LINK flag.
615		 * What is to be fixed is not ndp, but such routing software
616		 * (and the kernel workaround)...
617		 */
618		if (sdl->sdl_family != AF_LINK)
619			continue;
620
621		if (!(rtm->rtm_flags & RTF_HOST))
622			continue;
623
624		if (addr) {
625			if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr,
626			    &sin->sin6_addr) == 0 ||
627			    addr->sin6_scope_id != sin->sin6_scope_id)
628				continue;
629			found_entry = 1;
630		} else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
631			continue;
632		if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
633		    IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
634			/* XXX: should scope id be filled in the kernel? */
635			if (sin->sin6_scope_id == 0)
636				sin->sin6_scope_id = sdl->sdl_index;
637		}
638		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
639		    sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
640		if (cflag) {
641#ifdef RTF_WASCLONED
642			if (rtm->rtm_flags & RTF_WASCLONED)
643				delete(host_buf);
644#elif defined(RTF_CLONED)
645			if (rtm->rtm_flags & RTF_CLONED)
646				delete(host_buf);
647#else
648			delete(host_buf);
649#endif
650			continue;
651		}
652		gettimeofday(&now, 0);
653		if (tflag)
654			ts_print(&now);
655
656		addrwidth = strlen(host_buf);
657		if (addrwidth < W_ADDR)
658			addrwidth = W_ADDR;
659		llwidth = strlen(ether_str(sdl));
660		if (W_ADDR + W_LL - addrwidth > llwidth)
661			llwidth = W_ADDR + W_LL - addrwidth;
662		ifname = if_indextoname(sdl->sdl_index, ifix_buf);
663		if (!ifname)
664			ifname = "?";
665		ifwidth = strlen(ifname);
666		if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
667			ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
668
669		printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
670		    llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
671
672		/* Print neighbor discovery specific informations */
673		nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
674		if (nbi) {
675			if (nbi->expire > now.tv_sec) {
676				printf(" %-9.9s",
677				    sec2str(nbi->expire - now.tv_sec));
678			} else if (nbi->expire == 0)
679				printf(" %-9.9s", "permanent");
680			else
681				printf(" %-9.9s", "expired");
682
683			switch (nbi->state) {
684			case ND6_LLINFO_NOSTATE:
685				 printf(" N");
686				 break;
687#ifdef ND6_LLINFO_WAITDELETE
688			case ND6_LLINFO_WAITDELETE:
689				 printf(" W");
690				 break;
691#endif
692			case ND6_LLINFO_INCOMPLETE:
693				 printf(" I");
694				 break;
695			case ND6_LLINFO_REACHABLE:
696				 printf(" R");
697				 break;
698			case ND6_LLINFO_STALE:
699				 printf(" S");
700				 break;
701			case ND6_LLINFO_DELAY:
702				 printf(" D");
703				 break;
704			case ND6_LLINFO_PROBE:
705				 printf(" P");
706				 break;
707			default:
708				 printf(" ?");
709				 break;
710			}
711
712			isrouter = nbi->isrouter;
713			prbs = nbi->asked;
714		} else {
715			warnx("failed to get neighbor information");
716			printf("  ");
717		}
718
719		/*
720		 * other flags. R: router, P: proxy, W: ??
721		 */
722		if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
723			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
724			    isrouter ? "R" : "",
725			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
726		} else {
727			sin = (struct sockaddr_in6 *)
728			    (sdl->sdl_len + (char *)sdl);
729#if 0	/* W and P are mystery even for us */
730			snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
731			    isrouter ? "R" : "",
732			    !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
733			    (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
734			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
735#else
736			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
737			    isrouter ? "R" : "",
738			    (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
739#endif
740		}
741		printf(" %s", flgbuf);
742
743		if (prbs)
744			printf(" %d", prbs);
745
746		printf("\n");
747	}
748	if (buf != NULL)
749		free(buf);
750
751	if (repeat) {
752		printf("\n");
753		fflush(stdout);
754		sleep(repeat);
755		goto again;
756	}
757}
758
759static struct in6_nbrinfo *
760getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
761{
762	static struct in6_nbrinfo nbi;
763	int s;
764
765	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
766		err(1, "socket");
767
768	bzero(&nbi, sizeof(nbi));
769	if_indextoname(ifindex, nbi.ifname);
770	nbi.addr = *addr;
771	if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
772		if (warning)
773			warn("ioctl(SIOCGNBRINFO_IN6)");
774		close(s);
775		return(NULL);
776	}
777
778	close(s);
779	return(&nbi);
780}
781
782static char *
783ether_str(struct sockaddr_dl *sdl)
784{
785	static char hbuf[NI_MAXHOST];
786	char *cp;
787
788	if (sdl->sdl_alen == ETHER_ADDR_LEN) {
789		strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
790		    sizeof(hbuf));
791	} else if (sdl->sdl_alen) {
792		int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
793		snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
794	} else
795		snprintf(hbuf, sizeof(hbuf), "(incomplete)");
796
797	return(hbuf);
798}
799
800int
801ndp_ether_aton(char *a, u_char *n)
802{
803	int i, o[6];
804
805	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
806	    &o[3], &o[4], &o[5]);
807	if (i != 6) {
808		fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
809		return (1);
810	}
811	for (i = 0; i < 6; i++)
812		n[i] = o[i];
813	return (0);
814}
815
816void
817usage()
818{
819	printf("usage: ndp [-nt] hostname\n");
820	printf("       ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
821	printf("       ndp [-nt] -A wait\n");
822	printf("       ndp [-nt] -d hostname\n");
823	printf("       ndp [-nt] -f filename\n");
824	printf("       ndp [-nt] -i interface [flags...]\n");
825#ifdef SIOCSDEFIFACE_IN6
826	printf("       ndp [-nt] -I [interface|delete]\n");
827#endif
828	printf("       ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
829	exit(1);
830}
831
832int
833rtmsg(int cmd)
834{
835	static int seq;
836	int rlen;
837	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
838	register char *cp = m_rtmsg.m_space;
839	register int l;
840
841	errno = 0;
842	if (cmd == RTM_DELETE)
843		goto doit;
844	bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
845	rtm->rtm_flags = flags;
846	rtm->rtm_version = RTM_VERSION;
847
848	switch (cmd) {
849	default:
850		fprintf(stderr, "ndp: internal wrong cmd\n");
851		exit(1);
852	case RTM_ADD:
853		rtm->rtm_addrs |= RTA_GATEWAY;
854		if (expire_time) {
855			rtm->rtm_rmx.rmx_expire = expire_time;
856			rtm->rtm_inits = RTV_EXPIRE;
857		}
858		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
859#if 0 /* we don't support ipv6addr/128 type proxying */
860		if (rtm->rtm_flags & RTF_ANNOUNCE) {
861			rtm->rtm_flags &= ~RTF_HOST;
862			rtm->rtm_addrs |= RTA_NETMASK;
863		}
864#endif
865		/* FALLTHROUGH */
866	case RTM_GET:
867		rtm->rtm_addrs |= RTA_DST;
868	}
869
870	NEXTADDR(RTA_DST, sin_m);
871	NEXTADDR(RTA_GATEWAY, sdl_m);
872#if 0 /* we don't support ipv6addr/128 type proxying */
873	memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
874	NEXTADDR(RTA_NETMASK, so_mask);
875#endif
876
877	rtm->rtm_msglen = cp - (char *)&m_rtmsg;
878doit:
879	l = rtm->rtm_msglen;
880	rtm->rtm_seq = ++seq;
881	rtm->rtm_type = cmd;
882	if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
883		if (errno != ESRCH || cmd != RTM_DELETE) {
884			err(1, "writing to routing socket");
885			/* NOTREACHED */
886		}
887	}
888	do {
889		l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
890	} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
891	if (l < 0)
892		(void) fprintf(stderr, "ndp: read from routing socket: %s\n",
893		    strerror(errno));
894	return (0);
895}
896
897void
898ifinfo(char *ifname, int argc, char **argv)
899{
900	struct in6_ndireq nd;
901	int i, s;
902	u_int32_t newflags;
903#ifdef IPV6CTL_USETEMPADDR
904	u_int8_t nullbuf[8];
905#endif
906
907	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
908		err(1, "socket");
909		/* NOTREACHED */
910	}
911	bzero(&nd, sizeof(nd));
912	strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
913	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
914		err(1, "ioctl(SIOCGIFINFO_IN6)");
915		/* NOTREACHED */
916	}
917#define ND nd.ndi
918	newflags = ND.flags;
919	for (i = 0; i < argc; i++) {
920		int clear = 0;
921		char *cp = argv[i];
922
923		if (*cp == '-') {
924			clear = 1;
925			cp++;
926		}
927
928#define SETFLAG(s, f) \
929	do {\
930		if (strcmp(cp, (s)) == 0) {\
931			if (clear)\
932				newflags &= ~(f);\
933			else\
934				newflags |= (f);\
935		}\
936	} while (0)
937/*
938 * XXX: this macro is not 100% correct, in that it matches "nud" against
939 *      "nudbogus".  But we just let it go since this is minor.
940 */
941#define SETVALUE(f, v) \
942	do { \
943		char *valptr; \
944		unsigned long newval; \
945		v = 0; /* unspecified */ \
946		if (strncmp(cp, f, strlen(f)) == 0) { \
947			valptr = strchr(cp, '='); \
948			if (valptr == NULL) \
949				err(1, "syntax error in %s field", (f)); \
950			errno = 0; \
951			newval = strtoul(++valptr, NULL, 0); \
952			if (errno) \
953				err(1, "syntax error in %s's value", (f)); \
954			v = newval; \
955		} \
956	} while (0)
957
958		SETFLAG("disabled", ND6_IFF_IFDISABLED);
959		SETFLAG("nud", ND6_IFF_PERFORMNUD);
960#ifdef ND6_IFF_ACCEPT_RTADV
961		SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
962#endif
963#ifdef ND6_IFF_AUTO_LINKLOCAL
964		SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
965#endif
966#ifdef ND6_IFF_NO_PREFER_IFACE
967		SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
968#endif
969		SETVALUE("basereachable", ND.basereachable);
970		SETVALUE("retrans", ND.retrans);
971		SETVALUE("curhlim", ND.chlim);
972
973		ND.flags = newflags;
974		if (ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
975			err(1, "ioctl(SIOCSIFINFO_IN6)");
976			/* NOTREACHED */
977		}
978#undef SETFLAG
979#undef SETVALUE
980	}
981
982	if (!ND.initialized) {
983		errx(1, "%s: not initialized yet", ifname);
984		/* NOTREACHED */
985	}
986
987	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
988		err(1, "ioctl(SIOCGIFINFO_IN6)");
989		/* NOTREACHED */
990	}
991	printf("linkmtu=%d", ND.linkmtu);
992	printf(", maxmtu=%d", ND.maxmtu);
993	printf(", curhlim=%d", ND.chlim);
994	printf(", basereachable=%ds%dms",
995	    ND.basereachable / 1000, ND.basereachable % 1000);
996	printf(", reachable=%ds", ND.reachable);
997	printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
998#ifdef IPV6CTL_USETEMPADDR
999	memset(nullbuf, 0, sizeof(nullbuf));
1000	if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1001		int j;
1002		u_int8_t *rbuf;
1003
1004		for (i = 0; i < 3; i++) {
1005			switch (i) {
1006			case 0:
1007				printf("\nRandom seed(0): ");
1008				rbuf = ND.randomseed0;
1009				break;
1010			case 1:
1011				printf("\nRandom seed(1): ");
1012				rbuf = ND.randomseed1;
1013				break;
1014			case 2:
1015				printf("\nRandom ID:      ");
1016				rbuf = ND.randomid;
1017				break;
1018			default:
1019				errx(1, "impossible case for tempaddr display");
1020			}
1021			for (j = 0; j < 8; j++)
1022				printf("%02x", rbuf[j]);
1023		}
1024	}
1025#endif
1026	if (ND.flags) {
1027		printf("\nFlags: ");
1028#ifdef ND6_IFF_IFDISABLED
1029		if ((ND.flags & ND6_IFF_IFDISABLED))
1030			printf("disabled ");
1031#endif
1032		if ((ND.flags & ND6_IFF_PERFORMNUD))
1033			printf("nud ");
1034#ifdef ND6_IFF_ACCEPT_RTADV
1035		if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1036			printf("accept_rtadv ");
1037#endif
1038#ifdef ND6_IFF_AUTO_LINKLOCAL
1039		if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1040			printf("auto_linklocal ");
1041#endif
1042#ifdef ND6_IFF_NO_PREFER_IFACE
1043		if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1044			printf("no_prefer_iface ");
1045#endif
1046	}
1047	putc('\n', stdout);
1048#undef ND
1049
1050	close(s);
1051}
1052
1053#ifndef ND_RA_FLAG_RTPREF_MASK	/* XXX: just for compilation on *BSD release */
1054#define ND_RA_FLAG_RTPREF_MASK	0x18 /* 00011000 */
1055#endif
1056
1057void
1058rtrlist()
1059{
1060#ifdef ICMPV6CTL_ND6_DRLIST
1061	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1062	char *buf;
1063	struct in6_defrouter *p, *ep;
1064	size_t l;
1065	struct timeval now;
1066
1067	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1068		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1069		/*NOTREACHED*/
1070	}
1071	if (l == 0)
1072		return;
1073	buf = malloc(l);
1074	if (!buf) {
1075		err(1, "malloc");
1076		/*NOTREACHED*/
1077	}
1078	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1079		err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1080		/*NOTREACHED*/
1081	}
1082
1083	ep = (struct in6_defrouter *)(buf + l);
1084	for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1085		int rtpref;
1086
1087		if (getnameinfo((struct sockaddr *)&p->rtaddr,
1088		    p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1089		    (nflag ? NI_NUMERICHOST : 0)) != 0)
1090			strlcpy(host_buf, "?", sizeof(host_buf));
1091
1092		printf("%s if=%s", host_buf,
1093		    if_indextoname(p->if_index, ifix_buf));
1094		printf(", flags=%s%s",
1095		    p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1096		    p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1097		rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1098		printf(", pref=%s", rtpref_str[rtpref]);
1099
1100		gettimeofday(&now, 0);
1101		if (p->expire == 0)
1102			printf(", expire=Never\n");
1103		else
1104			printf(", expire=%s\n",
1105			    sec2str(p->expire - now.tv_sec));
1106	}
1107	free(buf);
1108#else
1109	struct in6_drlist dr;
1110	int s, i;
1111	struct timeval now;
1112
1113	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1114		err(1, "socket");
1115		/* NOTREACHED */
1116	}
1117	bzero(&dr, sizeof(dr));
1118	strlcpy(dr.ifname, "lo0", sizeof(dr.ifname)); /* dummy */
1119	if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1120		err(1, "ioctl(SIOCGDRLST_IN6)");
1121		/* NOTREACHED */
1122	}
1123#define DR dr.defrouter[i]
1124	for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1125		struct sockaddr_in6 sin6;
1126
1127		bzero(&sin6, sizeof(sin6));
1128		sin6.sin6_family = AF_INET6;
1129		sin6.sin6_len = sizeof(sin6);
1130		sin6.sin6_addr = DR.rtaddr;
1131		getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1132		    sizeof(host_buf), NULL, 0,
1133		    (nflag ? NI_NUMERICHOST : 0));
1134
1135		printf("%s if=%s", host_buf,
1136		    if_indextoname(DR.if_index, ifix_buf));
1137		printf(", flags=%s%s",
1138		    DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1139		    DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1140		gettimeofday(&now, 0);
1141		if (DR.expire == 0)
1142			printf(", expire=Never\n");
1143		else
1144			printf(", expire=%s\n",
1145			    sec2str(DR.expire - now.tv_sec));
1146	}
1147#undef DR
1148	close(s);
1149#endif
1150}
1151
1152void
1153plist()
1154{
1155#ifdef ICMPV6CTL_ND6_PRLIST
1156	int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1157	char *buf;
1158	struct in6_prefix *p, *ep, *n;
1159	struct sockaddr_in6 *advrtr;
1160	size_t l;
1161	struct timeval now;
1162	const int niflags = NI_NUMERICHOST;
1163	int ninflags = nflag ? NI_NUMERICHOST : 0;
1164	char namebuf[NI_MAXHOST];
1165
1166	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1167		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1168		/*NOTREACHED*/
1169	}
1170	buf = malloc(l);
1171	if (!buf) {
1172		err(1, "malloc");
1173		/*NOTREACHED*/
1174	}
1175	if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1176		err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1177		/*NOTREACHED*/
1178	}
1179
1180	ep = (struct in6_prefix *)(buf + l);
1181	for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1182		advrtr = (struct sockaddr_in6 *)(p + 1);
1183		n = (struct in6_prefix *)&advrtr[p->advrtrs];
1184
1185		if (getnameinfo((struct sockaddr *)&p->prefix,
1186		    p->prefix.sin6_len, namebuf, sizeof(namebuf),
1187		    NULL, 0, niflags) != 0)
1188			strlcpy(namebuf, "?", sizeof(namebuf));
1189		printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1190		    if_indextoname(p->if_index, ifix_buf));
1191
1192		gettimeofday(&now, 0);
1193		/*
1194		 * meaning of fields, especially flags, is very different
1195		 * by origin.  notify the difference to the users.
1196		 */
1197		printf("flags=%s%s%s%s%s",
1198		    p->raflags.onlink ? "L" : "",
1199		    p->raflags.autonomous ? "A" : "",
1200		    (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1201		    (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1202#ifdef NDPRF_HOME
1203		    (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1204#else
1205		    ""
1206#endif
1207		    );
1208		if (p->vltime == ND6_INFINITE_LIFETIME)
1209			printf(" vltime=infinity");
1210		else
1211			printf(" vltime=%lu", (unsigned long)p->vltime);
1212		if (p->pltime == ND6_INFINITE_LIFETIME)
1213			printf(", pltime=infinity");
1214		else
1215			printf(", pltime=%lu", (unsigned long)p->pltime);
1216		if (p->expire == 0)
1217			printf(", expire=Never");
1218		else if (p->expire >= now.tv_sec)
1219			printf(", expire=%s",
1220			    sec2str(p->expire - now.tv_sec));
1221		else
1222			printf(", expired");
1223		printf(", ref=%d", p->refcnt);
1224		printf("\n");
1225		/*
1226		 * "advertising router" list is meaningful only if the prefix
1227		 * information is from RA.
1228		 */
1229		if (p->advrtrs) {
1230			int j;
1231			struct sockaddr_in6 *sin6;
1232
1233			sin6 = advrtr;
1234			printf("  advertised by\n");
1235			for (j = 0; j < p->advrtrs; j++) {
1236				struct in6_nbrinfo *nbi;
1237
1238				if (getnameinfo((struct sockaddr *)sin6,
1239				    sin6->sin6_len, namebuf, sizeof(namebuf),
1240				    NULL, 0, ninflags) != 0)
1241					strlcpy(namebuf, "?", sizeof(namebuf));
1242				printf("    %s", namebuf);
1243
1244				nbi = getnbrinfo(&sin6->sin6_addr,
1245				    p->if_index, 0);
1246				if (nbi) {
1247					switch (nbi->state) {
1248					case ND6_LLINFO_REACHABLE:
1249					case ND6_LLINFO_STALE:
1250					case ND6_LLINFO_DELAY:
1251					case ND6_LLINFO_PROBE:
1252						printf(" (reachable)\n");
1253						break;
1254					default:
1255						printf(" (unreachable)\n");
1256					}
1257				} else
1258					printf(" (no neighbor state)\n");
1259				sin6++;
1260			}
1261		} else
1262			printf("  No advertising router\n");
1263	}
1264	free(buf);
1265#else
1266	struct in6_prlist pr;
1267	int s, i;
1268	struct timeval now;
1269
1270	gettimeofday(&now, 0);
1271
1272	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1273		err(1, "socket");
1274		/* NOTREACHED */
1275	}
1276	bzero(&pr, sizeof(pr));
1277	strlcpy(pr.ifname, "lo0", sizeof(pr.ifname)); /* dummy */
1278	if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1279		err(1, "ioctl(SIOCGPRLST_IN6)");
1280		/* NOTREACHED */
1281	}
1282#define PR pr.prefix[i]
1283	for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1284		struct sockaddr_in6 p6;
1285		char namebuf[NI_MAXHOST];
1286		int niflags;
1287
1288#ifdef NDPRF_ONLINK
1289		p6 = PR.prefix;
1290#else
1291		memset(&p6, 0, sizeof(p6));
1292		p6.sin6_family = AF_INET6;
1293		p6.sin6_len = sizeof(p6);
1294		p6.sin6_addr = PR.prefix;
1295#endif
1296		niflags = NI_NUMERICHOST;
1297		if (getnameinfo((struct sockaddr *)&p6,
1298		    sizeof(p6), namebuf, sizeof(namebuf),
1299		    NULL, 0, niflags)) {
1300			warnx("getnameinfo failed");
1301			continue;
1302		}
1303		printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1304		    if_indextoname(PR.if_index, ifix_buf));
1305
1306		gettimeofday(&now, 0);
1307		/*
1308		 * meaning of fields, especially flags, is very different
1309		 * by origin.  notify the difference to the users.
1310		 */
1311#if 0
1312		printf("  %s",
1313		    PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1314#endif
1315#ifdef NDPRF_ONLINK
1316		printf("flags=%s%s%s%s%s",
1317		    PR.raflags.onlink ? "L" : "",
1318		    PR.raflags.autonomous ? "A" : "",
1319		    (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1320		    (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1321#ifdef NDPRF_HOME
1322		    (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1323#else
1324		    ""
1325#endif
1326		    );
1327#else
1328		printf("flags=%s%s",
1329		    PR.raflags.onlink ? "L" : "",
1330		    PR.raflags.autonomous ? "A" : "");
1331#endif
1332		if (PR.vltime == ND6_INFINITE_LIFETIME)
1333			printf(" vltime=infinity");
1334		else
1335			printf(" vltime=%lu", PR.vltime);
1336		if (PR.pltime == ND6_INFINITE_LIFETIME)
1337			printf(", pltime=infinity");
1338		else
1339			printf(", pltime=%lu", PR.pltime);
1340		if (PR.expire == 0)
1341			printf(", expire=Never");
1342		else if (PR.expire >= now.tv_sec)
1343			printf(", expire=%s",
1344			    sec2str(PR.expire - now.tv_sec));
1345		else
1346			printf(", expired");
1347#ifdef NDPRF_ONLINK
1348		printf(", ref=%d", PR.refcnt);
1349#endif
1350#if 0
1351		switch (PR.origin) {
1352		case PR_ORIG_RA:
1353			printf(", origin=RA");
1354			break;
1355		case PR_ORIG_RR:
1356			printf(", origin=RR");
1357			break;
1358		case PR_ORIG_STATIC:
1359			printf(", origin=static");
1360			break;
1361		case PR_ORIG_KERNEL:
1362			printf(", origin=kernel");
1363			break;
1364		default:
1365			printf(", origin=?");
1366			break;
1367		}
1368#endif
1369		printf("\n");
1370		/*
1371		 * "advertising router" list is meaningful only if the prefix
1372		 * information is from RA.
1373		 */
1374		if (0 &&	/* prefix origin is almost obsolted */
1375		    PR.origin != PR_ORIG_RA)
1376			;
1377		else if (PR.advrtrs) {
1378			int j;
1379			printf("  advertised by\n");
1380			for (j = 0; j < PR.advrtrs; j++) {
1381				struct sockaddr_in6 sin6;
1382				struct in6_nbrinfo *nbi;
1383
1384				bzero(&sin6, sizeof(sin6));
1385				sin6.sin6_family = AF_INET6;
1386				sin6.sin6_len = sizeof(sin6);
1387				sin6.sin6_addr = PR.advrtr[j];
1388				sin6.sin6_scope_id = PR.if_index; /* XXX */
1389				getnameinfo((struct sockaddr *)&sin6,
1390				    sin6.sin6_len, host_buf,
1391				    sizeof(host_buf), NULL, 0,
1392				    (nflag ? NI_NUMERICHOST : 0));
1393				printf("    %s", host_buf);
1394
1395				nbi = getnbrinfo(&sin6.sin6_addr,
1396				    PR.if_index, 0);
1397				if (nbi) {
1398					switch (nbi->state) {
1399					case ND6_LLINFO_REACHABLE:
1400					case ND6_LLINFO_STALE:
1401					case ND6_LLINFO_DELAY:
1402					case ND6_LLINFO_PROBE:
1403						 printf(" (reachable)\n");
1404						 break;
1405					default:
1406						 printf(" (unreachable)\n");
1407					}
1408				} else
1409					printf(" (no neighbor state)\n");
1410			}
1411			if (PR.advrtrs > DRLSTSIZ)
1412				printf("    and %d routers\n",
1413				    PR.advrtrs - DRLSTSIZ);
1414		} else
1415			printf("  No advertising router\n");
1416	}
1417#undef PR
1418	close(s);
1419#endif
1420}
1421
1422void
1423pfx_flush()
1424{
1425	char dummyif[IFNAMSIZ+8];
1426	int s;
1427
1428	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1429		err(1, "socket");
1430	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1431	if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1432		err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1433}
1434
1435void
1436rtr_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, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1445		err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1446
1447	close(s);
1448}
1449
1450void
1451harmonize_rtr()
1452{
1453	char dummyif[IFNAMSIZ+8];
1454	int s;
1455
1456	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1457		err(1, "socket");
1458	strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1459	if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1460		err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1461
1462	close(s);
1463}
1464
1465#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
1466static void
1467setdefif(char *ifname)
1468{
1469	struct in6_ndifreq ndifreq;
1470	unsigned int ifindex;
1471
1472	if (strcasecmp(ifname, "delete") == 0)
1473		ifindex = 0;
1474	else {
1475		if ((ifindex = if_nametoindex(ifname)) == 0)
1476			err(1, "failed to resolve i/f index for %s", ifname);
1477	}
1478
1479	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1480		err(1, "socket");
1481
1482	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1483	ndifreq.ifindex = ifindex;
1484
1485	if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1486		err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1487
1488	close(s);
1489}
1490
1491static void
1492getdefif()
1493{
1494	struct in6_ndifreq ndifreq;
1495	char ifname[IFNAMSIZ+8];
1496
1497	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1498		err(1, "socket");
1499
1500	memset(&ndifreq, 0, sizeof(ndifreq));
1501	strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1502
1503	if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1504		err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1505
1506	if (ndifreq.ifindex == 0)
1507		printf("No default interface.\n");
1508	else {
1509		if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1510			err(1, "failed to resolve ifname for index %lu",
1511			    ndifreq.ifindex);
1512		printf("ND default interface = %s\n", ifname);
1513	}
1514
1515	close(s);
1516}
1517#endif
1518
1519static char *
1520sec2str(time_t total)
1521{
1522	static char result[256];
1523	int days, hours, mins, secs;
1524	int first = 1;
1525	char *p = result;
1526	char *ep = &result[sizeof(result)];
1527	int n;
1528
1529	days = total / 3600 / 24;
1530	hours = (total / 3600) % 24;
1531	mins = (total / 60) % 60;
1532	secs = total % 60;
1533
1534	if (days) {
1535		first = 0;
1536		n = snprintf(p, ep - p, "%dd", days);
1537		if (n < 0 || n >= ep - p)
1538			return "?";
1539		p += n;
1540	}
1541	if (!first || hours) {
1542		first = 0;
1543		n = snprintf(p, ep - p, "%dh", hours);
1544		if (n < 0 || n >= ep - p)
1545			return "?";
1546		p += n;
1547	}
1548	if (!first || mins) {
1549		first = 0;
1550		n = snprintf(p, ep - p, "%dm", mins);
1551		if (n < 0 || n >= ep - p)
1552			return "?";
1553		p += n;
1554	}
1555	snprintf(p, ep - p, "%ds", secs);
1556
1557	return(result);
1558}
1559
1560/*
1561 * Print the timestamp
1562 * from tcpdump/util.c
1563 */
1564static void
1565ts_print(const struct timeval *tvp)
1566{
1567	int s;
1568
1569	/* Default */
1570	s = (tvp->tv_sec + thiszone) % 86400;
1571	(void)printf("%02d:%02d:%02d.%06u ",
1572	    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1573}
1574
1575#undef NEXTADDR
1576