ndp.c revision 66865 
1/*	$FreeBSD: head/usr.sbin/ndp/ndp.c 66865 2000-10-09 09:28:49Z sumikawa $	*/
2/*	$KAME: ndp.c,v 1.46 2000/10/09 09:17:10 sumikawa 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 * 3. All advertising materials mentioning features or use of this software
48 *    must display the following acknowledgement:
49 *	This product includes software developed by the University of
50 *	California, Berkeley and its contributors.
51 * 4. Neither the name of the University nor the names of its contributors
52 *    may be used to endorse or promote products derived from this software
53 *    without specific prior written permission.
54 *
55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * SUCH DAMAGE.
66 */
67
68/*
69 * Based on:
70 * "@(#) Copyright (c) 1984, 1993\n\
71 *	The Regents of the University of California.  All rights reserved.\n";
72 *
73 * "@(#)arp.c	8.2 (Berkeley) 1/2/94";
74 */
75
76/*
77 * ndp - display, set, delete and flush neighbor cache
78 */
79
80
81#include <sys/param.h>
82#include <sys/file.h>
83#include <sys/ioctl.h>
84#include <sys/socket.h>
85#include <sys/sysctl.h>
86#include <sys/time.h>
87
88#include <net/if.h>
89#include <net/if_var.h>
90#include <net/if_dl.h>
91#include <net/if_types.h>
92#include <net/route.h>
93
94#include <netinet/in.h>
95#include <netinet/if_ether.h>
96
97#include <netinet/icmp6.h>
98#include <netinet6/in6_var.h>
99#include <netinet6/nd6.h>
100
101#include <arpa/inet.h>
102
103#include <netdb.h>
104#include <errno.h>
105#include <nlist.h>
106#include <stdio.h>
107#include <string.h>
108#include <paths.h>
109#include <err.h>
110#include <stdlib.h>
111#include <fcntl.h>
112#include <unistd.h>
113#include "gmt2local.h"
114
115#ifndef NI_WITHSCOPEID
116#define NI_WITHSCOPEID	0
117#endif
118
119/* packing rule for routing socket */
120#define ROUNDUP(a) \
121	((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
122#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
123
124static int pid;
125static int cflag;
126static int nflag;
127static int tflag;
128static int32_t thiszone;	/* time difference with gmt */
129static int s = -1;
130static int repeat = 0;
131static int lflag = 0;
132
133char ntop_buf[INET6_ADDRSTRLEN];	/* inet_ntop() */
134char host_buf[NI_MAXHOST];		/* getnameinfo() */
135char ifix_buf[IFNAMSIZ];		/* if_indextoname() */
136
137int main __P((int, char **));
138int file __P((char *));
139void getsocket __P((void));
140int set __P((int, char **));
141void get __P((char *));
142int delete __P((char *));
143void dump __P((struct in6_addr *));
144static struct in6_nbrinfo *getnbrinfo __P((struct in6_addr *addr,
145					   int ifindex, int));
146static char *ether_str __P((struct sockaddr_dl *));
147int ndp_ether_aton __P((char *, u_char *));
148void usage __P((void));
149int rtmsg __P((int));
150void ifinfo __P((int, char **));
151void rtrlist __P((void));
152void plist __P((void));
153void pfx_flush __P((void));
154void rtrlist __P((void));
155void rtr_flush __P((void));
156void harmonize_rtr __P((void));
157#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
158static void getdefif __P((void));
159static void setdefif __P((char *));
160#endif
161static char *sec2str __P((time_t t));
162static char *ether_str __P((struct sockaddr_dl *sdl));
163static void ts_print __P((const struct timeval *));
164
165int
166main(argc, argv)
167	int argc;
168	char **argv;
169{
170	int ch;
171	int aflag = 0, dflag = 0, sflag = 0, Hflag = 0,
172		pflag = 0, rflag = 0, Pflag = 0, Rflag = 0;
173
174	pid = getpid();
175	thiszone = gmt2local(0);
176	while ((ch = getopt(argc, argv, "acndfIilprstA:HPR")) != EOF)
177		switch ((char)ch) {
178		case 'a':
179			aflag = 1;
180			break;
181		case 'c':
182			cflag = 1;
183			break;
184		case 'd':
185			dflag = 1;
186			break;
187		case 'I':
188#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
189			if (argc > 2)
190				setdefif(argv[2]);
191			getdefif(); /* always call it to print the result */
192			exit(0);
193#else
194			errx(1, "not supported yet");
195			/*NOTREACHED*/
196#endif
197		case 'i' :
198			argc -= optind;
199			argv += optind;
200			if (argc < 1)
201				usage();
202			ifinfo(argc, argv);
203			exit(0);
204		case 'n':
205			nflag = 1;
206			continue;
207		case 'p':
208			pflag = 1;
209			break;
210		case 'f' :
211			if (argc != 3)
212				usage();
213			file(argv[2]);
214			exit(0);
215		case 'l' :
216			lflag = 1;
217			break;
218		case 'r' :
219			rflag = 1;
220			break;
221		case 's':
222			sflag = 1;
223			break;
224		case 't':
225			tflag = 1;
226			break;
227		case 'A':
228			aflag = 1;
229			repeat = atoi(optarg);
230			if (repeat < 0)
231				usage();
232			break;
233		case 'H' :
234			Hflag = 1;
235			break;
236		case 'P':
237			Pflag = 1;
238			break;
239		case 'R':
240			Rflag = 1;
241			break;
242		default:
243			usage();
244		}
245
246	argc -= optind;
247	argv += optind;
248
249	if (aflag || cflag) {
250		dump(0);
251		exit(0);
252	}
253	if (dflag) {
254		if (argc != 1)
255			usage();
256		delete(argv[0]);
257		exit(0);
258	}
259	if (pflag) {
260		plist();
261		exit(0);
262	}
263	if (rflag) {
264		rtrlist();
265		exit(0);
266	}
267	if (sflag) {
268		if (argc < 2 || argc > 4)
269			usage();
270		exit(set(argc, argv) ? 1 : 0);
271	}
272	if (Hflag) {
273		harmonize_rtr();
274		exit(0);
275	}
276	if (Pflag) {
277		pfx_flush();
278		exit(0);
279	}
280	if (Rflag) {
281		rtr_flush();
282		exit(0);
283	}
284
285	if (argc != 1)
286		usage();
287	get(argv[0]);
288	exit(0);
289}
290
291/*
292 * Process a file to set standard ndp entries
293 */
294int
295file(name)
296	char *name;
297{
298	FILE *fp;
299	int i, retval;
300	char line[100], arg[5][50], *args[5];
301
302	if ((fp = fopen(name, "r")) == NULL) {
303		fprintf(stderr, "ndp: cannot open %s\n", name);
304		exit(1);
305	}
306	args[0] = &arg[0][0];
307	args[1] = &arg[1][0];
308	args[2] = &arg[2][0];
309	args[3] = &arg[3][0];
310	args[4] = &arg[4][0];
311	retval = 0;
312	while(fgets(line, 100, fp) != NULL) {
313		i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2],
314		    arg[3], arg[4]);
315		if (i < 2) {
316			fprintf(stderr, "ndp: bad line: %s\n", line);
317			retval = 1;
318			continue;
319		}
320		if (set(i, args))
321			retval = 1;
322	}
323	fclose(fp);
324	return (retval);
325}
326
327void
328getsocket()
329{
330	if (s < 0) {
331		s = socket(PF_ROUTE, SOCK_RAW, 0);
332		if (s < 0) {
333			perror("ndp: socket");
334			exit(1);
335		}
336	}
337}
338
339struct	sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
340struct	sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
341struct	sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
342int	expire_time, flags, found_entry;
343struct	{
344	struct	rt_msghdr m_rtm;
345	char	m_space[512];
346}	m_rtmsg;
347
348/*
349 * Set an individual neighbor cache entry
350 */
351int
352set(argc, argv)
353	int argc;
354	char **argv;
355{
356	register struct sockaddr_in6 *sin = &sin_m;
357	register struct sockaddr_dl *sdl;
358	register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
359	struct addrinfo hints, *res;
360	int gai_error;
361	u_char *ea;
362	char *host = argv[0], *eaddr = argv[1];
363
364	getsocket();
365	argc -= 2;
366	argv += 2;
367	sdl_m = blank_sdl;
368	sin_m = blank_sin;
369
370	bzero(&hints, sizeof(hints));
371	hints.ai_family = AF_INET6;
372	gai_error = getaddrinfo(host, NULL, &hints, &res);
373	if (gai_error) {
374		fprintf(stderr, "ndp: %s: %s\n", host,
375			gai_strerror(gai_error));
376		return 1;
377	}
378	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
379#ifdef __KAME__
380	if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
381		*(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
382			htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
383	}
384#endif
385	ea = (u_char *)LLADDR(&sdl_m);
386	if (ndp_ether_aton(eaddr, ea) == 0)
387		sdl_m.sdl_alen = 6;
388	flags = expire_time = 0;
389	while (argc-- > 0) {
390		if (strncmp(argv[0], "temp", 4) == 0) {
391			struct timeval time;
392			gettimeofday(&time, 0);
393			expire_time = time.tv_sec + 20 * 60;
394		} else if (strncmp(argv[0], "proxy", 5) == 0)
395			flags |= RTF_ANNOUNCE;
396		argv++;
397	}
398	if (rtmsg(RTM_GET) < 0) {
399		perror(host);
400		return (1);
401	}
402	sin = (struct sockaddr_in6 *)(rtm + 1);
403	sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
404	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
405		if (sdl->sdl_family == AF_LINK &&
406		    (rtm->rtm_flags & RTF_LLINFO) &&
407		    !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
408		case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
409		case IFT_ISO88024: case IFT_ISO88025:
410			goto overwrite;
411		}
412		/*
413		 * IPv4 arp command retries with sin_other = SIN_PROXY here.
414		 */
415		fprintf(stderr, "set: cannot configure a new entry\n");
416		return 1;
417	}
418
419overwrite:
420	if (sdl->sdl_family != AF_LINK) {
421		printf("cannot intuit interface index and type for %s\n", host);
422		return (1);
423	}
424	sdl_m.sdl_type = sdl->sdl_type;
425	sdl_m.sdl_index = sdl->sdl_index;
426	return (rtmsg(RTM_ADD));
427}
428
429/*
430 * Display an individual neighbor cache entry
431 */
432void
433get(host)
434	char *host;
435{
436	struct sockaddr_in6 *sin = &sin_m;
437	struct addrinfo hints, *res;
438	int gai_error;
439
440	sin_m = blank_sin;
441	bzero(&hints, sizeof(hints));
442	hints.ai_family = AF_INET6;
443	gai_error = getaddrinfo(host, NULL, &hints, &res);
444	if (gai_error) {
445		fprintf(stderr, "ndp: %s: %s\n", host,
446			gai_strerror(gai_error));
447		return;
448	}
449	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
450#ifdef __KAME__
451	if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
452		*(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
453			htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
454	}
455#endif
456	dump(&sin->sin6_addr);
457	if (found_entry == 0) {
458		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
459			    sizeof(host_buf), NULL ,0,
460			    NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
461		printf("%s (%s) -- no entry\n", host, host_buf);
462		exit(1);
463	}
464}
465
466/*
467 * Delete a neighbor cache entry
468 */
469int
470delete(host)
471	char *host;
472{
473	struct sockaddr_in6 *sin = &sin_m;
474	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
475	struct sockaddr_dl *sdl;
476	struct addrinfo hints, *res;
477	int gai_error;
478
479	getsocket();
480	sin_m = blank_sin;
481
482	bzero(&hints, sizeof(hints));
483	hints.ai_family = AF_INET6;
484	gai_error = getaddrinfo(host, NULL, &hints, &res);
485	if (gai_error) {
486		fprintf(stderr, "ndp: %s: %s\n", host,
487			gai_strerror(gai_error));
488		return 1;
489	}
490	sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
491#ifdef __KAME__
492	if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
493		*(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
494			htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
495	}
496#endif
497	if (rtmsg(RTM_GET) < 0) {
498		perror(host);
499		return (1);
500	}
501	sin = (struct sockaddr_in6 *)(rtm + 1);
502	sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
503	if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
504		if (sdl->sdl_family == AF_LINK &&
505		    (rtm->rtm_flags & RTF_LLINFO) &&
506		    !(rtm->rtm_flags & RTF_GATEWAY)) {
507			switch (sdl->sdl_type) {
508			case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
509			case IFT_ISO88024: case IFT_ISO88025:
510				goto delete;
511			}
512		}
513		/*
514		 * IPv4 arp command retries with sin_other = SIN_PROXY here.
515		 */
516		fprintf(stderr, "delete: cannot delete non-NDP entry\n");
517		return 1;
518	}
519
520delete:
521	if (sdl->sdl_family != AF_LINK) {
522		printf("cannot locate %s\n", host);
523		return (1);
524	}
525	if (rtmsg(RTM_DELETE) == 0) {
526		struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
527
528#ifdef __KAME__
529		if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
530			s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
531			*(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
532		}
533#endif
534		getnameinfo((struct sockaddr *)&s6,
535			    s6.sin6_len, host_buf,
536			    sizeof(host_buf), NULL, 0,
537			    NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
538		printf("%s (%s) deleted\n", host, host_buf);
539	}
540
541	return 0;
542}
543
544/*
545 * Dump the entire neighbor cache
546 */
547void
548dump(addr)
549	struct in6_addr *addr;
550{
551	int mib[6];
552	size_t needed;
553	char *lim, *buf, *next;
554	struct rt_msghdr *rtm;
555	struct sockaddr_in6 *sin;
556	struct sockaddr_dl *sdl;
557	extern int h_errno;
558	struct in6_nbrinfo *nbi;
559	struct timeval time;
560	int addrwidth;
561	char flgbuf[8];
562
563	/* Print header */
564	if (!tflag && !cflag)
565		printf("%-31.31s %-17.17s %6.6s %-9.9s %2s %4s %4s\n",
566		       "Neighbor", "Linklayer Address", "Netif", "Expire",
567		       "St", "Flgs", "Prbs");
568
569again:;
570	mib[0] = CTL_NET;
571	mib[1] = PF_ROUTE;
572	mib[2] = 0;
573	mib[3] = AF_INET6;
574	mib[4] = NET_RT_FLAGS;
575	mib[5] = RTF_LLINFO;
576	if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
577		err(1, "sysctl(PF_ROUTE estimate)");
578	if (needed > 0) {
579		if ((buf = malloc(needed)) == NULL)
580			errx(1, "malloc");
581		if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
582			err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
583		lim = buf + needed;
584	} else
585		buf = lim = NULL;
586
587	for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
588		int isrouter = 0, prbs = 0;
589
590		rtm = (struct rt_msghdr *)next;
591		sin = (struct sockaddr_in6 *)(rtm + 1);
592		sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
593		if (addr) {
594			if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
595				continue;
596			found_entry = 1;
597		} else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
598			continue;
599		if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
600		    IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
601			/* XXX: should scope id be filled in the kernel? */
602			if (sin->sin6_scope_id == 0)
603				sin->sin6_scope_id = sdl->sdl_index;
604#ifdef __KAME__
605			/* KAME specific hack; removed the embedded id */
606			*(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
607#endif
608		}
609		getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
610			    sizeof(host_buf), NULL, 0,
611			    NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
612		if (cflag == 1) {
613			delete(host_buf);
614			continue;
615		}
616		gettimeofday(&time, 0);
617		if (tflag)
618			ts_print(&time);
619
620		if (lflag) {
621			addrwidth = strlen(host_buf);
622			if (addrwidth < 31)
623				addrwidth = 31;
624		} else
625			addrwidth = 31;
626
627		printf("%-*.*s %-17.17s %6.6s", addrwidth, addrwidth, host_buf,
628		       ether_str(sdl),
629		       if_indextoname(sdl->sdl_index, ifix_buf));
630
631		/* Print neighbor discovery specific informations */
632		nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
633		if (nbi) {
634			if (nbi->expire > time.tv_sec) {
635				printf(" %-9.9s",
636				       sec2str(nbi->expire - time.tv_sec));
637			}
638			else if (nbi->expire == 0)
639				printf(" %-9.9s", "permanent");
640			else
641				printf(" %-9.9s", "expired");
642
643			switch(nbi->state) {
644			 case ND6_LLINFO_NOSTATE:
645				 printf(" N");
646				 break;
647			 case ND6_LLINFO_WAITDELETE:
648				 printf(" W");
649				 break;
650			 case ND6_LLINFO_INCOMPLETE:
651				 printf(" I");
652				 break;
653			 case ND6_LLINFO_REACHABLE:
654				 printf(" R");
655				 break;
656			 case ND6_LLINFO_STALE:
657				 printf(" S");
658				 break;
659			 case ND6_LLINFO_DELAY:
660				 printf(" D");
661				 break;
662			 case ND6_LLINFO_PROBE:
663				 printf(" P");
664				 break;
665			 default:
666				 printf(" ?");
667				 break;
668			}
669
670			isrouter = nbi->isrouter;
671			prbs = nbi->asked;
672		}
673		else {
674			warnx("failed to get neighbor information");
675			printf("  ");
676		}
677		putchar(' ');
678
679		/*
680		 * other flags. R: router, P: proxy, W: ??
681		 */
682		if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
683			snprintf(flgbuf, sizeof(flgbuf), "%s%s",
684				isrouter ? "R" : "",
685				(rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
686		} else {
687			sin = (struct sockaddr_in6 *)
688				(sdl->sdl_len + (char *)sdl);
689			snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
690				isrouter ? "R" : "",
691				!IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr)
692					? "P" : "",
693				(sin->sin6_len != sizeof(struct sockaddr_in6))
694					? "W" : "",
695				(rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
696		}
697		printf(" %-4.4s", flgbuf);
698
699		if (prbs)
700			printf(" %4d", prbs);
701
702		printf("\n");
703	}
704
705	if (repeat) {
706		printf("\n");
707		sleep(repeat);
708		goto again;
709	}
710}
711
712static struct in6_nbrinfo *
713getnbrinfo(addr, ifindex, warning)
714	struct in6_addr *addr;
715	int ifindex;
716	int warning;
717{
718	static struct in6_nbrinfo nbi;
719	int s;
720
721	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
722		err(1, "socket");
723
724	bzero(&nbi, sizeof(nbi));
725	if_indextoname(ifindex, nbi.ifname);
726	nbi.addr = *addr;
727	if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
728		if (warning)
729			warn("ioctl(SIOCGNBRINFO_IN6)");
730		close(s);
731		return(NULL);
732	}
733
734	close(s);
735	return(&nbi);
736}
737
738static char *
739ether_str(sdl)
740	struct sockaddr_dl *sdl;
741{
742	static char ebuf[32];
743	u_char *cp;
744
745	if (sdl->sdl_alen) {
746		cp = (u_char *)LLADDR(sdl);
747		sprintf(ebuf, "%x:%x:%x:%x:%x:%x",
748			cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
749	}
750	else {
751		sprintf(ebuf, "(incomplete)");
752	}
753
754	return(ebuf);
755}
756
757int
758ndp_ether_aton(a, n)
759	char *a;
760	u_char *n;
761{
762	int i, o[6];
763
764	i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
765					   &o[3], &o[4], &o[5]);
766	if (i != 6) {
767		fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
768		return (1);
769	}
770	for (i=0; i<6; i++)
771		n[i] = o[i];
772	return (0);
773}
774
775void
776usage()
777{
778	printf("usage: ndp hostname\n");
779	printf("       ndp -a[ntl]\n");
780	printf("       ndp [-ntl] -A wait\n");
781	printf("       ndp -c[nt]\n");
782	printf("       ndp -d[nt] hostname\n");
783	printf("       ndp -f[nt] filename\n");
784	printf("       ndp -i interface [flags...]\n");
785#ifdef SIOCSDEFIFACE_IN6
786	printf("       ndp -I [interface|delete]\n");
787#endif
788	printf("       ndp -p\n");
789	printf("       ndp -r\n");
790	printf("       ndp -s hostname ether_addr [temp] [proxy]\n");
791	printf("       ndp -H\n");
792	printf("       ndp -P\n");
793	printf("       ndp -R\n");
794	exit(1);
795}
796
797int
798rtmsg(cmd)
799	int cmd;
800{
801	static int seq;
802	int rlen;
803	register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
804	register char *cp = m_rtmsg.m_space;
805	register int l;
806
807	errno = 0;
808	if (cmd == RTM_DELETE)
809		goto doit;
810	bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
811	rtm->rtm_flags = flags;
812	rtm->rtm_version = RTM_VERSION;
813
814	switch (cmd) {
815	default:
816		fprintf(stderr, "ndp: internal wrong cmd\n");
817		exit(1);
818	case RTM_ADD:
819		rtm->rtm_addrs |= RTA_GATEWAY;
820		rtm->rtm_rmx.rmx_expire = expire_time;
821		rtm->rtm_inits = RTV_EXPIRE;
822		rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
823		if (rtm->rtm_flags & RTF_ANNOUNCE) {
824			rtm->rtm_flags &= ~RTF_HOST;
825			rtm->rtm_flags |= RTA_NETMASK;
826		}
827		/* FALLTHROUGH */
828	case RTM_GET:
829		rtm->rtm_addrs |= RTA_DST;
830	}
831#define NEXTADDR(w, s) \
832	if (rtm->rtm_addrs & (w)) { \
833		bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);}
834
835	NEXTADDR(RTA_DST, sin_m);
836	NEXTADDR(RTA_GATEWAY, sdl_m);
837	memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
838	NEXTADDR(RTA_NETMASK, so_mask);
839
840	rtm->rtm_msglen = cp - (char *)&m_rtmsg;
841doit:
842	l = rtm->rtm_msglen;
843	rtm->rtm_seq = ++seq;
844	rtm->rtm_type = cmd;
845	if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
846		if (errno != ESRCH || cmd != RTM_DELETE) {
847			perror("writing to routing socket");
848			return (-1);
849		}
850	}
851	do {
852		l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
853	} while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
854	if (l < 0)
855		(void) fprintf(stderr, "ndp: read from routing socket: %s\n",
856		    strerror(errno));
857	return (0);
858}
859
860void
861ifinfo(argc, argv)
862	int argc;
863	char **argv;
864{
865	struct in6_ndireq nd;
866	int i, s;
867	char *ifname = argv[0];
868	u_int32_t newflags;
869
870	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
871		perror("ndp: socket");
872		exit(1);
873	}
874	bzero(&nd, sizeof(nd));
875	strcpy(nd.ifname, ifname);
876	if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
877 		perror("ioctl (SIOCGIFINFO_IN6)");
878 		exit(1);
879 	}
880#define ND nd.ndi
881	newflags = ND.flags;
882	for (i = 1; i < argc; i++) {
883		int clear = 0;
884		char *cp = argv[i];
885
886		if (*cp == '-') {
887			clear = 1;
888			cp++;
889		}
890
891#define SETFLAG(s, f) \
892	do {\
893		if (strcmp(cp, (s)) == 0) {\
894			if (clear)\
895				newflags &= ~(f);\
896			else\
897				newflags |= (f);\
898		}\
899	} while (0)
900		SETFLAG("nud", ND6_IFF_PERFORMNUD);
901
902		ND.flags = newflags;
903		if (ioctl(s, SIOCSIFINFO_FLAGS, (caddr_t)&nd) < 0) {
904			perror("ioctl(SIOCSIFINFO_FLAGS)");
905			exit(1);
906		}
907#undef SETFLAG
908	}
909
910	printf("linkmtu=%d", ND.linkmtu);
911	printf(", curhlim=%d", ND.chlim);
912	printf(", basereachable=%ds%dms",
913	       ND.basereachable / 1000, ND.basereachable % 1000);
914	printf(", reachable=%ds", ND.reachable);
915	printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
916	if (ND.flags) {
917		printf("\nFlags: ");
918		if ((ND.flags & ND6_IFF_PERFORMNUD) != 0)
919			printf("PERFORMNUD ");
920	}
921	putc('\n', stdout);
922#undef ND
923
924	close(s);
925}
926
927void
928rtrlist()
929{
930	struct in6_drlist dr;
931	int s, i;
932	struct timeval time;
933
934	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
935		perror("ndp: socket");
936		exit(1);
937	}
938	bzero(&dr, sizeof(dr));
939	strcpy(dr.ifname, "lo0"); /* dummy */
940	if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
941 		perror("ioctl (SIOCGDRLST_IN6)");
942 		exit(1);
943 	}
944#define DR dr.defrouter[i]
945	for (i = 0 ; DR.if_index && i < PRLSTSIZ ; i++) {
946		struct sockaddr_in6 sin6;
947
948		bzero(&sin6, sizeof(sin6));
949		sin6.sin6_family = AF_INET6;
950		sin6.sin6_len = sizeof(sin6);
951		sin6.sin6_addr = DR.rtaddr;
952		getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
953			    sizeof(host_buf), NULL, 0,
954			    NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
955
956		printf("%s if=%s", host_buf,
957		       if_indextoname(DR.if_index, ifix_buf));
958		printf(", flags=%s%s",
959		       DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
960		       DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
961		gettimeofday(&time, 0);
962		if (DR.expire == 0)
963			printf(", expire=Never\n");
964		else
965			printf(", expire=%s\n",
966				sec2str(DR.expire - time.tv_sec));
967	}
968#undef DR
969	close(s);
970}
971
972void
973plist()
974{
975	struct in6_prlist pr;
976	int s, i;
977	struct timeval time;
978
979	gettimeofday(&time, 0);
980
981	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
982		perror("ndp: socket");
983		exit(1);
984	}
985	bzero(&pr, sizeof(pr));
986	strcpy(pr.ifname, "lo0"); /* dummy */
987	if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
988 		perror("ioctl (SIOCGPRLST_IN6)");
989 		exit(1);
990 	}
991#define PR pr.prefix[i]
992	for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
993		printf("%s/%d if=%s\n",
994		       inet_ntop(AF_INET6, &PR.prefix, ntop_buf,
995				 sizeof(ntop_buf)), PR.prefixlen,
996		       if_indextoname(PR.if_index, ifix_buf));
997		gettimeofday(&time, 0);
998		/*
999		 * meaning of fields, especially flags, is very different
1000		 * by origin.  notify the difference to the users.
1001		 */
1002		printf("  %s", PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1003		printf("flags=%s%s",
1004		       PR.raflags.onlink ? "L" : "",
1005		       PR.raflags.autonomous ? "A" : "");
1006		if (PR.vltime == ND6_INFINITE_LIFETIME)
1007			printf(" vltime=infinity");
1008		else
1009			printf(" vltime=%ld", (long)PR.vltime);
1010		if (PR.pltime == ND6_INFINITE_LIFETIME)
1011			printf(", pltime=infinity");
1012		else
1013			printf(", pltime=%ld", (long)PR.pltime);
1014		if (PR.expire == 0)
1015			printf(", expire=Never");
1016		else if (PR.expire >= time.tv_sec)
1017			printf(", expire=%s",
1018				sec2str(PR.expire - time.tv_sec));
1019		else
1020			printf(", expired");
1021		switch (PR.origin) {
1022		case PR_ORIG_RA:
1023			printf(", origin=RA");
1024			break;
1025		case PR_ORIG_RR:
1026			printf(", origin=RR");
1027			break;
1028		case PR_ORIG_STATIC:
1029			printf(", origin=static");
1030			break;
1031		case PR_ORIG_KERNEL:
1032			printf(", origin=kernel");
1033			break;
1034		default:
1035			printf(", origin=?");
1036			break;
1037		}
1038		printf("\n");
1039		/*
1040		 * "advertising router" list is meaningful only if the prefix
1041		 * information is from RA.
1042		 */
1043		if (PR.origin != PR_ORIG_RA)
1044			;
1045		else if (PR.advrtrs) {
1046			int j;
1047			printf("  advertised by\n");
1048			for (j = 0; j < PR.advrtrs; j++) {
1049				struct sockaddr_in6 sin6;
1050				struct in6_nbrinfo *nbi;
1051
1052				bzero(&sin6, sizeof(sin6));
1053				sin6.sin6_family = AF_INET6;
1054				sin6.sin6_len = sizeof(sin6);
1055				sin6.sin6_addr = PR.advrtr[j];
1056				sin6.sin6_scope_id = PR.if_index; /* XXX */
1057				getnameinfo((struct sockaddr *)&sin6,
1058					    sin6.sin6_len, host_buf,
1059					    sizeof(host_buf), NULL, 0,
1060					    NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1061				printf("    %s", host_buf);
1062
1063				nbi = getnbrinfo(&sin6.sin6_addr, PR.if_index,
1064						 0);
1065				if (nbi) {
1066					switch(nbi->state) {
1067					 case ND6_LLINFO_REACHABLE:
1068					 case ND6_LLINFO_STALE:
1069					 case ND6_LLINFO_DELAY:
1070					 case ND6_LLINFO_PROBE:
1071						 printf(" (reachable)\n");
1072						 break;
1073					 default:
1074						 printf(" (unreachable)\n");
1075					}
1076				}
1077				else
1078					printf(" (no neighbor state)\n");
1079			}
1080			if (PR.advrtrs > DRLSTSIZ)
1081				printf("    and %d routers\n",
1082				       PR.advrtrs - DRLSTSIZ);
1083		} else
1084			printf("  No advertising router\n");
1085	}
1086#undef PR
1087	close(s);
1088}
1089
1090void
1091pfx_flush()
1092{
1093	char dummyif[IFNAMSIZ+8];
1094	int s;
1095
1096	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1097		err(1, "socket");
1098	strcpy(dummyif, "lo0"); /* dummy */
1099	if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1100 		err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1101}
1102
1103void
1104rtr_flush()
1105{
1106	char dummyif[IFNAMSIZ+8];
1107	int s;
1108
1109	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1110		err(1, "socket");
1111	strcpy(dummyif, "lo0"); /* dummy */
1112	if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1113 		err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1114
1115	close(s);
1116}
1117
1118void
1119harmonize_rtr()
1120{
1121	char dummyif[IFNAMSIZ+8];
1122	int s;
1123
1124	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1125		err(1, "socket");
1126	strcpy(dummyif, "lo0"); /* dummy */
1127	if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1128 		err(1, "ioctl (SIOCSNDFLUSH_IN6)");
1129
1130	close(s);
1131}
1132
1133#ifdef SIOCSDEFIFACE_IN6	/* XXX: check SIOCGDEFIFACE_IN6 as well? */
1134static void
1135setdefif(ifname)
1136	char *ifname;
1137{
1138	struct in6_ndifreq ndifreq;
1139	unsigned int ifindex;
1140
1141	if (strcasecmp(ifname, "delete") == 0)
1142		ifindex = 0;
1143	else {
1144		if ((ifindex = if_nametoindex(ifname)) == 0)
1145			err(1, "failed to resolve i/f index for %s", ifname);
1146	}
1147
1148	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1149		err(1, "socket");
1150
1151	strcpy(ndifreq.ifname, "lo0"); /* dummy */
1152	ndifreq.ifindex = ifindex;
1153
1154	if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1155 		err(1, "ioctl (SIOCSDEFIFACE_IN6)");
1156
1157	close(s);
1158}
1159
1160static void
1161getdefif()
1162{
1163	struct in6_ndifreq ndifreq;
1164	char ifname[IFNAMSIZ+8];
1165
1166	if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1167		err(1, "socket");
1168
1169	memset(&ndifreq, 0, sizeof(ndifreq));
1170	strcpy(ndifreq.ifname, "lo0"); /* dummy */
1171
1172	if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1173 		err(1, "ioctl (SIOCGDEFIFACE_IN6)");
1174
1175	if (ndifreq.ifindex == 0)
1176		printf("No default interface.\n");
1177	else {
1178		if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1179			err(1, "failed to resolve ifname for index %lu",
1180			    ndifreq.ifindex);
1181		printf("ND default interface = %s\n", ifname);
1182	}
1183
1184	close(s);
1185}
1186#endif
1187
1188static char *
1189sec2str(total)
1190	time_t total;
1191{
1192	static char result[256];
1193	int days, hours, mins, secs;
1194	int first = 1;
1195	char *p = result;
1196
1197	days = total / 3600 / 24;
1198	hours = (total / 3600) % 24;
1199	mins = (total / 60) % 60;
1200	secs = total % 60;
1201
1202	if (days) {
1203		first = 0;
1204		p += sprintf(p, "%dd", days);
1205	}
1206	if (!first || hours) {
1207		first = 0;
1208		p += sprintf(p, "%dh", hours);
1209	}
1210	if (!first || mins) {
1211		first = 0;
1212		p += sprintf(p, "%dm", mins);
1213	}
1214	sprintf(p, "%ds", secs);
1215
1216	return(result);
1217}
1218
1219/*
1220 * Print the timestamp
1221 * from tcpdump/util.c
1222 */
1223static void
1224ts_print(tvp)
1225	const struct timeval *tvp;
1226{
1227	int s;
1228
1229	/* Default */
1230	s = (tvp->tv_sec + thiszone) % 86400;
1231	(void)printf("%02d:%02d:%02d.%06u ",
1232	    s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1233}
1234