Add the "accept_rtadv" interface option to specifiy whether to accept
[dragonfly.git] / usr.sbin / ndp / ndp.c
1 /*      $FreeBSD: src/usr.sbin/ndp/ndp.c,v 1.2.2.6 2003/08/12 16:27:57 ume Exp $        */
2 /*      $DragonFly: src/usr.sbin/ndp/ndp.c,v 1.6 2004/12/30 02:35:24 hsu Exp $  */
3 /*      $KAME: ndp.c,v 1.65 2001/05/08 04:36:34 itojun Exp $    */
4
5 /*
6  * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 3. Neither the name of the project nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 /*
34  * Copyright (c) 1984, 1993
35  *      The Regents of the University of California.  All rights reserved.
36  *
37  * This code is derived from software contributed to Berkeley by
38  * Sun Microsystems, Inc.
39  *
40  * Redistribution and use in source and binary forms, with or without
41  * modification, are permitted provided that the following conditions
42  * are met:
43  * 1. Redistributions of source code must retain the above copyright
44  *    notice, this list of conditions and the following disclaimer.
45  * 2. Redistributions in binary form must reproduce the above copyright
46  *    notice, this list of conditions and the following disclaimer in the
47  *    documentation and/or other materials provided with the distribution.
48  * 3. All advertising materials mentioning features or use of this software
49  *    must display the following acknowledgement:
50  *      This product includes software developed by the University of
51  *      California, Berkeley and its contributors.
52  * 4. Neither the name of the University nor the names of its contributors
53  *    may be used to endorse or promote products derived from this software
54  *    without specific prior written permission.
55  *
56  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
57  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
58  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
59  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
60  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
61  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
62  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
63  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
64  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
65  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
66  * SUCH DAMAGE.
67  */
68
69 /*
70  * Based on:
71  * "@(#) Copyright (c) 1984, 1993\n\
72  *      The Regents of the University of California.  All rights reserved.\n";
73  *
74  * "@(#)arp.c   8.2 (Berkeley) 1/2/94";
75  */
76
77 /*
78  * ndp - display, set, delete and flush neighbor cache
79  */
80
81
82 #include <sys/param.h>
83 #include <sys/file.h>
84 #include <sys/ioctl.h>
85 #include <sys/socket.h>
86 #include <sys/sysctl.h>
87 #include <sys/time.h>
88 #include <sys/queue.h>
89
90 #include <net/if.h>
91 #include <net/if_var.h>
92 #include <net/if_dl.h>
93 #include <net/if_types.h>
94 #include <net/route.h>
95
96 #include <netinet/in.h>
97 #include <netinet/if_ether.h>
98
99 #include <netinet/icmp6.h>
100 #include <netinet6/in6_var.h>
101 #include <netinet6/nd6.h>
102
103 #include <arpa/inet.h>
104
105 #include <netdb.h>
106 #include <errno.h>
107 #include <nlist.h>
108 #include <stdio.h>
109 #include <string.h>
110 #include <paths.h>
111 #include <err.h>
112 #include <stdlib.h>
113 #include <fcntl.h>
114 #include <unistd.h>
115 #include "gmt2local.h"
116
117 #ifndef NI_WITHSCOPEID
118 #define NI_WITHSCOPEID  0
119 #endif
120
121 /* packing rule for routing socket */
122 #define ROUNDUP(a) \
123         ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
124 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
125
126 static int pid;
127 static int cflag;
128 static int nflag;
129 static int tflag;
130 static int32_t thiszone;        /* time difference with gmt */
131 static int s = -1;
132 static int repeat = 0;
133
134 char ntop_buf[INET6_ADDRSTRLEN];        /* inet_ntop() */
135 char host_buf[NI_MAXHOST];              /* getnameinfo() */
136 char ifix_buf[IFNAMSIZ];                /* if_indextoname() */
137
138 int main(int, char **);
139 int file(char *);
140 void getsocket(void);
141 int set(int, char **);
142 void get(char *);
143 int delete(char *);
144 void dump(struct in6_addr *);
145 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *addr,
146                                            int ifindex, int);
147 static char *ether_str(struct sockaddr_dl *);
148 int ndp_ether_aton(char *, u_char *);
149 void usage(void);
150 int rtmsg(int);
151 void ifinfo(int, char **);
152 void rtrlist(void);
153 void plist(void);
154 void pfx_flush(void);
155 void rtrlist(void);
156 void rtr_flush(void);
157 void harmonize_rtr(void);
158 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
159 static void getdefif(void);
160 static void setdefif(char *);
161 #endif
162 static char *sec2str(time_t t);
163 static char *ether_str(struct sockaddr_dl *sdl);
164 static void ts_print(const struct timeval *);
165
166 static char *rtpref_str[] = {
167         "medium",               /* 00 */
168         "high",                 /* 01 */
169         "rsv",                  /* 10 */
170         "low"                   /* 11 */
171 };
172
173 int
174 main(int argc, char **argv)
175 {
176         int ch;
177         int aflag = 0, dflag = 0, sflag = 0, Hflag = 0,
178                 pflag = 0, rflag = 0, Pflag = 0, Rflag = 0;
179
180         pid = getpid();
181         thiszone = gmt2local(0);
182         while ((ch = getopt(argc, argv, "acndfIilprstA:HPR")) != -1)
183                 switch ((char)ch) {
184                 case 'a':
185                         aflag = 1;
186                         break;
187                 case 'c':
188                         cflag = 1;
189                         break;
190                 case 'd':
191                         dflag = 1;
192                         break;
193                 case 'I':
194 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
195                         if (argc > 2)
196                                 setdefif(argv[2]);
197                         getdefif(); /* always call it to print the result */
198                         exit(0);
199 #else
200                         errx(1, "not supported yet");
201                         /*NOTREACHED*/
202 #endif
203                 case 'i' :
204                         argc -= optind;
205                         argv += optind;
206                         if (argc < 1)
207                                 usage();
208                         ifinfo(argc, argv);
209                         exit(0);
210                 case 'n':
211                         nflag = 1;
212                         continue;
213                 case 'p':
214                         pflag = 1;
215                         break;
216                 case 'f' :
217                         if (argc != 3)
218                                 usage();
219                         file(argv[2]);
220                         exit(0);
221                 case 'l' :
222                         /* obsolete, ignored */
223                         break;
224                 case 'r' :
225                         rflag = 1;
226                         break;
227                 case 's':
228                         sflag = 1;
229                         break;
230                 case 't':
231                         tflag = 1;
232                         break;
233                 case 'A':
234                         aflag = 1;
235                         repeat = atoi(optarg);
236                         if (repeat < 0)
237                                 usage();
238                         break;
239                 case 'H' :
240                         Hflag = 1;
241                         break;
242                 case 'P':
243                         Pflag = 1;
244                         break;
245                 case 'R':
246                         Rflag = 1;
247                         break;
248                 default:
249                         usage();
250                 }
251
252         argc -= optind;
253         argv += optind;
254
255         if (aflag || cflag) {
256                 dump(0);
257                 exit(0);
258         }
259         if (dflag) {
260                 if (argc != 1)
261                         usage();
262                 delete(argv[0]);
263                 exit(0);
264         }
265         if (pflag) {
266                 plist();
267                 exit(0);
268         }
269         if (rflag) {
270                 rtrlist();
271                 exit(0);
272         }
273         if (sflag) {
274                 if (argc < 2 || argc > 4)
275                         usage();
276                 exit(set(argc, argv) ? 1 : 0);
277         }
278         if (Hflag) {
279                 harmonize_rtr();
280                 exit(0);
281         }
282         if (Pflag) {
283                 pfx_flush();
284                 exit(0);
285         }
286         if (Rflag) {
287                 rtr_flush();
288                 exit(0);
289         }
290
291         if (argc != 1)
292                 usage();
293         get(argv[0]);
294         exit(0);
295 }
296
297 /*
298  * Process a file to set standard ndp entries
299  */
300 int
301 file(char *name)
302 {
303         FILE *fp;
304         int i, retval;
305         char line[100], arg[5][50], *args[5];
306
307         if ((fp = fopen(name, "r")) == NULL) {
308                 fprintf(stderr, "ndp: cannot open %s\n", name);
309                 exit(1);
310         }
311         args[0] = &arg[0][0];
312         args[1] = &arg[1][0];
313         args[2] = &arg[2][0];
314         args[3] = &arg[3][0];
315         args[4] = &arg[4][0];
316         retval = 0;
317         while(fgets(line, 100, fp) != NULL) {
318                 i = sscanf(line, "%s %s %s %s %s", arg[0], arg[1], arg[2],
319                     arg[3], arg[4]);
320                 if (i < 2) {
321                         fprintf(stderr, "ndp: bad line: %s\n", line);
322                         retval = 1;
323                         continue;
324                 }
325                 if (set(i, args))
326                         retval = 1;
327         }
328         fclose(fp);
329         return (retval);
330 }
331
332 void
333 getsocket(void)
334 {
335         if (s < 0) {
336                 s = socket(PF_ROUTE, SOCK_RAW, 0);
337                 if (s < 0) {
338                         perror("ndp: socket");
339                         exit(1);
340                 }
341         }
342 }
343
344 struct  sockaddr_in6 so_mask = {sizeof(so_mask), AF_INET6 };
345 struct  sockaddr_in6 blank_sin = {sizeof(blank_sin), AF_INET6 }, sin_m;
346 struct  sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
347 int     expire_time, flags, found_entry;
348 struct  {
349         struct  rt_msghdr m_rtm;
350         char    m_space[512];
351 }       m_rtmsg;
352
353 /*
354  * Set an individual neighbor cache entry
355  */
356 int
357 set(int argc, char **argv)
358 {
359         struct sockaddr_in6 *sin = &sin_m;
360         struct sockaddr_dl *sdl;
361         struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
362         struct addrinfo hints, *res;
363         int gai_error;
364         u_char *ea;
365         char *host = argv[0], *eaddr = argv[1];
366
367         getsocket();
368         argc -= 2;
369         argv += 2;
370         sdl_m = blank_sdl;
371         sin_m = blank_sin;
372
373         bzero(&hints, sizeof(hints));
374         hints.ai_family = AF_INET6;
375         gai_error = getaddrinfo(host, NULL, &hints, &res);
376         if (gai_error) {
377                 fprintf(stderr, "ndp: %s: %s\n", host,
378                         gai_strerror(gai_error));
379                 return 1;
380         }
381         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
382 #ifdef __KAME__
383         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
384                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
385                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
386         }
387 #endif
388         ea = (u_char *)LLADDR(&sdl_m);
389         if (ndp_ether_aton(eaddr, ea) == 0)
390                 sdl_m.sdl_alen = 6;
391         flags = expire_time = 0;
392         while (argc-- > 0) {
393                 if (strncmp(argv[0], "temp", 4) == 0) {
394                         struct timeval time;
395                         gettimeofday(&time, 0);
396                         expire_time = time.tv_sec + 20 * 60;
397                 } else if (strncmp(argv[0], "proxy", 5) == 0)
398                         flags |= RTF_ANNOUNCE;
399                 argv++;
400         }
401         if (rtmsg(RTM_GET) < 0) {
402                 perror(host);
403                 return (1);
404         }
405         sin = (struct sockaddr_in6 *)(rtm + 1);
406         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
407         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
408                 if (sdl->sdl_family == AF_LINK &&
409                     (rtm->rtm_flags & RTF_LLINFO) &&
410                     !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
411                 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
412                 case IFT_ISO88024: case IFT_ISO88025:
413                         goto overwrite;
414                 }
415                 /*
416                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
417                  */
418                 fprintf(stderr, "set: cannot configure a new entry\n");
419                 return 1;
420         }
421
422 overwrite:
423         if (sdl->sdl_family != AF_LINK) {
424                 printf("cannot intuit interface index and type for %s\n", host);
425                 return (1);
426         }
427         sdl_m.sdl_type = sdl->sdl_type;
428         sdl_m.sdl_index = sdl->sdl_index;
429         return (rtmsg(RTM_ADD));
430 }
431
432 /*
433  * Display an individual neighbor cache entry
434  */
435 void
436 get(char *host)
437 {
438         struct sockaddr_in6 *sin = &sin_m;
439         struct addrinfo hints, *res;
440         int gai_error;
441
442         sin_m = blank_sin;
443         bzero(&hints, sizeof(hints));
444         hints.ai_family = AF_INET6;
445         gai_error = getaddrinfo(host, NULL, &hints, &res);
446         if (gai_error) {
447                 fprintf(stderr, "ndp: %s: %s\n", host,
448                         gai_strerror(gai_error));
449                 return;
450         }
451         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
452 #ifdef __KAME__
453         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
454                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
455                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
456         }
457 #endif
458         dump(&sin->sin6_addr);
459         if (found_entry == 0) {
460                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
461                             sizeof(host_buf), NULL ,0,
462                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
463                 printf("%s (%s) -- no entry\n", host, host_buf);
464                 exit(1);
465         }
466 }
467
468 /*
469  * Delete a neighbor cache entry
470  */
471 int
472 delete(char *host)
473 {
474         struct sockaddr_in6 *sin = &sin_m;
475         struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
476         struct sockaddr_dl *sdl;
477         struct addrinfo hints, *res;
478         int gai_error;
479
480         getsocket();
481         sin_m = blank_sin;
482
483         bzero(&hints, sizeof(hints));
484         hints.ai_family = AF_INET6;
485         gai_error = getaddrinfo(host, NULL, &hints, &res);
486         if (gai_error) {
487                 fprintf(stderr, "ndp: %s: %s\n", host,
488                         gai_strerror(gai_error));
489                 return 1;
490         }
491         sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
492 #ifdef __KAME__
493         if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr)) {
494                 *(u_int16_t *)&sin->sin6_addr.s6_addr[2] =
495                         htons(((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id);
496         }
497 #endif
498         if (rtmsg(RTM_GET) < 0) {
499                 perror(host);
500                 return (1);
501         }
502         sin = (struct sockaddr_in6 *)(rtm + 1);
503         sdl = (struct sockaddr_dl *)(ROUNDUP(sin->sin6_len) + (char *)sin);
504         if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
505                 if (sdl->sdl_family == AF_LINK &&
506                     (rtm->rtm_flags & RTF_LLINFO) &&
507                     !(rtm->rtm_flags & RTF_GATEWAY)) {
508                         goto delete;
509                 }
510                 /*
511                  * IPv4 arp command retries with sin_other = SIN_PROXY here.
512                  */
513                 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
514                 return 1;
515         }
516
517 delete:
518         if (sdl->sdl_family != AF_LINK) {
519                 printf("cannot locate %s\n", host);
520                 return (1);
521         }
522         if (rtmsg(RTM_DELETE) == 0) {
523                 struct sockaddr_in6 s6 = *sin; /* XXX: for safety */
524
525 #ifdef __KAME__
526                 if (IN6_IS_ADDR_LINKLOCAL(&s6.sin6_addr)) {
527                         s6.sin6_scope_id = ntohs(*(u_int16_t *)&s6.sin6_addr.s6_addr[2]);
528                         *(u_int16_t *)&s6.sin6_addr.s6_addr[2] = 0;
529                 }
530 #endif
531                 getnameinfo((struct sockaddr *)&s6,
532                             s6.sin6_len, host_buf,
533                             sizeof(host_buf), NULL, 0,
534                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
535                 printf("%s (%s) deleted\n", host, host_buf);
536         }
537
538         return 0;
539 }
540
541 #define W_ADDR  31
542 #define W_LL    17
543 #define W_IF    6
544
545 /*
546  * Dump the entire neighbor cache
547  */
548 void
549 dump(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         int llwidth;
562         int ifwidth;
563         char flgbuf[8];
564         char *ifname;
565
566         /* Print header */
567         if (!tflag && !cflag)
568                 printf("%-*.*s %-*.*s %*.*s %-9.9s %2s %4s %4s\n",
569                     W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
570                     W_IF, W_IF, "Netif", "Expire", "St", "Flgs", "Prbs");
571
572 again:;
573         mib[0] = CTL_NET;
574         mib[1] = PF_ROUTE;
575         mib[2] = 0;
576         mib[3] = AF_INET6;
577         mib[4] = NET_RT_FLAGS;
578         mib[5] = RTF_LLINFO;
579         if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
580                 err(1, "sysctl(PF_ROUTE estimate)");
581         if (needed > 0) {
582                 if ((buf = malloc(needed)) == NULL)
583                         errx(1, "malloc");
584                 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
585                         err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
586                 lim = buf + needed;
587         } else
588                 buf = lim = NULL;
589
590         for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
591                 int isrouter = 0, prbs = 0;
592
593                 rtm = (struct rt_msghdr *)next;
594                 sin = (struct sockaddr_in6 *)(rtm + 1);
595                 sdl = (struct sockaddr_dl *)((char *)sin + ROUNDUP(sin->sin6_len));
596
597                 /*
598                  * Some OSes can produce a route that has the LINK flag but
599                  * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
600                  * and BSD/OS, where xx is not the interface identifier on
601                  * lo0).  Such routes entry would annoy getnbrinfo() below,
602                  * so we skip them.
603                  * XXX: such routes should have the GATEWAY flag, not the
604                  * LINK flag.  However, there are rotten routing software
605                  * that advertises all routes that have the GATEWAY flag.
606                  * Thus, KAME kernel intentionally does not set the LINK flag.
607                  * What is to be fixed is not ndp, but such routing software
608                  * (and the kernel workaround)...
609                  */
610                 if (sdl->sdl_family != AF_LINK)
611                         continue;
612
613                 if (addr) {
614                         if (!IN6_ARE_ADDR_EQUAL(addr, &sin->sin6_addr))
615                                 continue;
616                         found_entry = 1;
617                 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
618                         continue;
619                 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
620                     IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
621                         /* XXX: should scope id be filled in the kernel? */
622                         if (sin->sin6_scope_id == 0)
623                                 sin->sin6_scope_id = sdl->sdl_index;
624 #ifdef __KAME__
625                         /* KAME specific hack; removed the embedded id */
626                         *(u_int16_t *)&sin->sin6_addr.s6_addr[2] = 0;
627 #endif
628                 }
629                 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
630                             sizeof(host_buf), NULL, 0,
631                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
632                 if (cflag == 1) {
633 #ifdef RTF_WASCLONED
634                         if (rtm->rtm_flags & RTF_WASCLONED)
635                                 delete(host_buf);
636 #else
637                         delete(host_buf);
638 #endif
639                         continue;
640                 }
641                 gettimeofday(&time, 0);
642                 if (tflag)
643                         ts_print(&time);
644
645                 addrwidth = strlen(host_buf);
646                 if (addrwidth < W_ADDR)
647                         addrwidth = W_ADDR;
648                 llwidth = strlen(ether_str(sdl));
649                 if (W_ADDR + W_LL - addrwidth > llwidth)
650                         llwidth = W_ADDR + W_LL - addrwidth;
651                 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
652                 if (!ifname)
653                         ifname = "?";
654                 ifwidth = strlen(ifname);
655                 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
656                         ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
657
658                 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
659                     llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
660
661                 /* Print neighbor discovery specific informations */
662                 nbi = getnbrinfo(&sin->sin6_addr, sdl->sdl_index, 1);
663                 if (nbi) {
664                         if (nbi->expire > time.tv_sec) {
665                                 printf(" %-9.9s",
666                                        sec2str(nbi->expire - time.tv_sec));
667                         } else if (nbi->expire == 0)
668                                 printf(" %-9.9s", "permanent");
669                         else
670                                 printf(" %-9.9s", "expired");
671
672                         switch(nbi->state) {
673                          case ND6_LLINFO_NOSTATE:
674                                  printf(" N");
675                                  break;
676 #ifdef ND6_LLINFO_WAITDELETE
677                          case ND6_LLINFO_WAITDELETE:
678                                  printf(" W");
679                                  break;
680 #endif
681                          case ND6_LLINFO_INCOMPLETE:
682                                  printf(" I");
683                                  break;
684                          case ND6_LLINFO_REACHABLE:
685                                  printf(" R");
686                                  break;
687                          case ND6_LLINFO_STALE:
688                                  printf(" S");
689                                  break;
690                          case ND6_LLINFO_DELAY:
691                                  printf(" D");
692                                  break;
693                          case ND6_LLINFO_PROBE:
694                                  printf(" P");
695                                  break;
696                          default:
697                                  printf(" ?");
698                                  break;
699                         }
700
701                         isrouter = nbi->isrouter;
702                         prbs = nbi->asked;
703                 } else {
704                         warnx("failed to get neighbor information");
705                         printf("  ");
706                 }
707                 putchar(' ');
708
709                 /*
710                  * other flags. R: router, P: proxy, W: ??
711                  */
712                 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
713                         snprintf(flgbuf, sizeof(flgbuf), "%s%s",
714                                 isrouter ? "R" : "",
715                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
716                 } else {
717                         sin = (struct sockaddr_in6 *)
718                                 (sdl->sdl_len + (char *)sdl);
719                         snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
720                                 isrouter ? "R" : "",
721                                 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr)
722                                         ? "P" : "",
723                                 (sin->sin6_len != sizeof(struct sockaddr_in6))
724                                         ? "W" : "",
725                                 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
726                 }
727                 printf(" %-4.4s", flgbuf);
728
729                 if (prbs)
730                         printf(" %4d", prbs);
731
732                 printf("\n");
733         }
734         if (buf != NULL)
735                 free(buf);
736
737         if (repeat) {
738                 printf("\n");
739                 sleep(repeat);
740                 goto again;
741         }
742 }
743
744 static struct in6_nbrinfo *
745 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
746 {
747         static struct in6_nbrinfo nbi;
748         int s;
749
750         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
751                 err(1, "socket");
752
753         bzero(&nbi, sizeof(nbi));
754         if_indextoname(ifindex, nbi.ifname);
755         nbi.addr = *addr;
756         if (ioctl(s, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
757                 if (warning)
758                         warn("ioctl(SIOCGNBRINFO_IN6)");
759                 close(s);
760                 return(NULL);
761         }
762
763         close(s);
764         return(&nbi);
765 }
766
767 static char *
768 ether_str(struct sockaddr_dl *sdl)
769 {
770         static char ebuf[32];
771         u_char *cp;
772
773         if (sdl->sdl_alen) {
774                 cp = (u_char *)LLADDR(sdl);
775                 sprintf(ebuf, "%x:%x:%x:%x:%x:%x",
776                         cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]);
777         } else {
778                 sprintf(ebuf, "(incomplete)");
779         }
780
781         return(ebuf);
782 }
783
784 int
785 ndp_ether_aton(char *a, u_char *n)
786 {
787         int i, o[6];
788
789         i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
790                                            &o[3], &o[4], &o[5]);
791         if (i != 6) {
792                 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
793                 return (1);
794         }
795         for (i=0; i<6; i++)
796                 n[i] = o[i];
797         return (0);
798 }
799
800 void
801 usage(void)
802 {
803         printf("usage: ndp hostname\n");
804         printf("       ndp -a[nt]\n");
805         printf("       ndp [-nt] -A wait\n");
806         printf("       ndp -c[nt]\n");
807         printf("       ndp -d[nt] hostname\n");
808         printf("       ndp -f[nt] filename\n");
809         printf("       ndp -i interface [flags...]\n");
810 #ifdef SIOCSDEFIFACE_IN6
811         printf("       ndp -I [interface|delete]\n");
812 #endif
813         printf("       ndp -p\n");
814         printf("       ndp -r\n");
815         printf("       ndp -s hostname ether_addr [temp] [proxy]\n");
816         printf("       ndp -H\n");
817         printf("       ndp -P\n");
818         printf("       ndp -R\n");
819         exit(1);
820 }
821
822 int
823 rtmsg(int cmd)
824 {
825         static int seq;
826         int rlen;
827         struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
828         char *cp = m_rtmsg.m_space;
829         int l;
830
831         errno = 0;
832         if (cmd == RTM_DELETE)
833                 goto doit;
834         bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
835         rtm->rtm_flags = flags;
836         rtm->rtm_version = RTM_VERSION;
837
838         switch (cmd) {
839         default:
840                 fprintf(stderr, "ndp: internal wrong cmd\n");
841                 exit(1);
842         case RTM_ADD:
843                 rtm->rtm_addrs |= RTA_GATEWAY;
844                 rtm->rtm_rmx.rmx_expire = expire_time;
845                 rtm->rtm_inits = RTV_EXPIRE;
846                 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC);
847                 if (rtm->rtm_flags & RTF_ANNOUNCE) {
848                         rtm->rtm_flags &= ~RTF_HOST;
849                         rtm->rtm_flags |= RTA_NETMASK;
850                 }
851                 /* FALLTHROUGH */
852         case RTM_GET:
853                 rtm->rtm_addrs |= RTA_DST;
854         }
855 #define NEXTADDR(w, s) \
856         if (rtm->rtm_addrs & (w)) { \
857                 bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);}
858
859         NEXTADDR(RTA_DST, sin_m);
860         NEXTADDR(RTA_GATEWAY, sdl_m);
861         memset(&so_mask.sin6_addr, 0xff, sizeof(so_mask.sin6_addr));
862         NEXTADDR(RTA_NETMASK, so_mask);
863
864         rtm->rtm_msglen = cp - (char *)&m_rtmsg;
865 doit:
866         l = rtm->rtm_msglen;
867         rtm->rtm_seq = ++seq;
868         rtm->rtm_type = cmd;
869         if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
870                 if (errno != ESRCH || cmd != RTM_DELETE) {
871                         perror("writing to routing socket");
872                         return (-1);
873                 }
874         }
875         do {
876                 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
877         } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid));
878         if (l < 0)
879                 fprintf(stderr, "ndp: read from routing socket: %s\n",
880                     strerror(errno));
881         return (0);
882 }
883
884 void
885 ifinfo(int argc, char **argv)
886 {
887         struct in6_ndireq nd;
888         int i, s;
889         char *ifname = argv[0];
890         u_int32_t newflags;
891 #ifdef IPV6CTL_USETEMPADDR
892         u_int8_t nullbuf[8];
893 #endif
894
895         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
896                 perror("ndp: socket");
897                 exit(1);
898         }
899         bzero(&nd, sizeof(nd));
900         strcpy(nd.ifname, ifname);
901         if (ioctl(s, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
902                 perror("ioctl (SIOCGIFINFO_IN6)");
903                 exit(1);
904         }
905 #define ND nd.ndi
906         newflags = ND.flags;
907         for (i = 1; i < argc; i++) {
908                 int clear = 0;
909                 char *cp = argv[i];
910
911                 if (*cp == '-') {
912                         clear = 1;
913                         cp++;
914                 }
915
916 #define SETFLAG(s, f) \
917         do {\
918                 if (strcmp(cp, (s)) == 0) {\
919                         if (clear)\
920                                 newflags &= ~(f);\
921                         else\
922                                 newflags |= (f);\
923                 }\
924         } while (0)
925                 SETFLAG("nud", ND6_IFF_PERFORMNUD);
926 #ifdef ND6_IFF_ACCEPT_RTADV
927                 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
928 #endif
929                 ND.flags = newflags;
930                 if (ioctl(s, SIOCSIFINFO_FLAGS, (caddr_t)&nd) < 0) {
931                         perror("ioctl(SIOCSIFINFO_FLAGS)");
932                         exit(1);
933                 }
934 #undef SETFLAG
935         }
936
937         printf("linkmtu=%d", ND.linkmtu);
938         printf(", curhlim=%d", ND.chlim);
939         printf(", basereachable=%ds%dms",
940                ND.basereachable / 1000, ND.basereachable % 1000);
941         printf(", reachable=%ds", ND.reachable);
942         printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
943 #ifdef IPV6CTL_USETEMPADDR
944         memset(nullbuf, 0, sizeof(nullbuf));
945         if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
946                 int j;
947                 u_int8_t *rbuf;
948
949                 for (i = 0; i < 3; i++) {
950                         switch(i) {
951                         case 0:
952                                 printf("\nRandom seed(0): ");
953                                 rbuf = ND.randomseed0;
954                                 break;
955                         case 1:
956                                 printf("\nRandom seed(1): ");
957                                 rbuf = ND.randomseed1;
958                                 break;
959                         case 2:
960                                 printf("\nRandom ID:      ");
961                                 rbuf = ND.randomid;
962                                 break;
963                         }
964                         for (j = 0; j < 8; j++)
965                                 printf("%02x", rbuf[j]);
966                 }
967         }
968 #endif
969         if (ND.flags) {
970                 printf("\nFlags: ");
971                 if ((ND.flags & ND6_IFF_PERFORMNUD))
972                         printf("nud ");
973 #ifdef ND6_IFF_ACCEPT_RTADV
974                 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
975                         printf("accept_rtadv ");
976 #endif
977         }
978         putc('\n', stdout);
979 #undef ND
980         
981         close(s);
982 }
983
984 #ifndef ND_RA_FLAG_RTPREF_MASK  /* XXX: just for compilation on *BSD release */
985 #define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
986 #endif
987
988 void
989 rtrlist(void)
990 {
991 #ifdef ICMPV6CTL_ND6_DRLIST
992         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
993         char *buf;
994         struct in6_defrouter *p, *ep;
995         size_t l;
996         struct timeval time;
997
998         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
999                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1000                 /*NOTREACHED*/
1001         }
1002         buf = malloc(l);
1003         if (!buf) {
1004                 errx(1, "not enough core");
1005                 /*NOTREACHED*/
1006         }
1007         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1008                 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1009                 /*NOTREACHED*/
1010         }
1011
1012         ep = (struct in6_defrouter *)(buf + l);
1013         for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1014                 int rtpref;
1015
1016                 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1017                     p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1018                     NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0)) != 0)
1019                         strlcpy(host_buf, "?", sizeof(host_buf));
1020                 
1021                 printf("%s if=%s", host_buf,
1022                        if_indextoname(p->if_index, ifix_buf));
1023                 printf(", flags=%s%s",
1024                        p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1025                        p->flags & ND_RA_FLAG_OTHER   ? "O" : "");
1026                 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1027                 printf(", pref=%s", rtpref_str[rtpref]);
1028                 
1029                 gettimeofday(&time, 0);
1030                 if (p->expire == 0)
1031                         printf(", expire=Never\n");
1032                 else
1033                         printf(", expire=%s\n",
1034                                 sec2str(p->expire - time.tv_sec));
1035         }
1036         free(buf);
1037 #else
1038         struct in6_drlist dr;
1039         int s, i;
1040         struct timeval time;
1041
1042         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1043                 perror("ndp: socket");
1044                 exit(1);
1045         }
1046         bzero(&dr, sizeof(dr));
1047         strcpy(dr.ifname, "lo0"); /* dummy */
1048         if (ioctl(s, SIOCGDRLST_IN6, (caddr_t)&dr) < 0) {
1049                 perror("ioctl (SIOCGDRLST_IN6)");
1050                 exit(1);
1051         }
1052 #define DR dr.defrouter[i]
1053         for (i = 0 ; DR.if_index && i < DRLSTSIZ ; i++) {
1054                 struct sockaddr_in6 sin6;
1055
1056                 bzero(&sin6, sizeof(sin6));
1057                 sin6.sin6_family = AF_INET6;
1058                 sin6.sin6_len = sizeof(sin6);
1059                 sin6.sin6_addr = DR.rtaddr;
1060                 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, host_buf,
1061                             sizeof(host_buf), NULL, 0,
1062                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1063                 
1064                 printf("%s if=%s", host_buf,
1065                        if_indextoname(DR.if_index, ifix_buf));
1066                 printf(", flags=%s%s",
1067                        DR.flags & ND_RA_FLAG_MANAGED ? "M" : "",
1068                        DR.flags & ND_RA_FLAG_OTHER   ? "O" : "");
1069                 gettimeofday(&time, 0);
1070                 if (DR.expire == 0)
1071                         printf(", expire=Never\n");
1072                 else
1073                         printf(", expire=%s\n",
1074                                 sec2str(DR.expire - time.tv_sec));
1075         }
1076 #undef DR
1077         close(s);
1078 #endif
1079 }
1080
1081 void
1082 plist(void)
1083 {
1084 #ifdef ICMPV6CTL_ND6_PRLIST
1085         int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1086         char *buf;
1087         struct in6_prefix *p, *ep, *n;
1088         struct sockaddr_in6 *advrtr;
1089         size_t l;
1090         struct timeval time;
1091 #ifdef NI_WITHSCOPEID
1092         const int niflags = NI_NUMERICHOST | NI_WITHSCOPEID;
1093         int ninflags = (nflag ? NI_NUMERICHOST : 0) | NI_WITHSCOPEID;
1094 #else
1095         const int niflags = NI_NUMERICHOST;
1096         int ninflags = nflag ? NI_NUMERICHOST : 0;
1097 #endif
1098         char namebuf[NI_MAXHOST];
1099
1100         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1101                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1102                 /*NOTREACHED*/
1103         }
1104         buf = malloc(l);
1105         if (!buf) {
1106                 errx(1, "not enough core");
1107                 /*NOTREACHED*/
1108         }
1109         if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1110                 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1111                 /*NOTREACHED*/
1112         }
1113
1114         ep = (struct in6_prefix *)(buf + l);
1115         for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1116                 advrtr = (struct sockaddr_in6 *)(p + 1);
1117                 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1118
1119                 if (getnameinfo((struct sockaddr *)&p->prefix,
1120                     p->prefix.sin6_len, namebuf, sizeof(namebuf),
1121                     NULL, 0, niflags) != 0)
1122                         strlcpy(namebuf, "?", sizeof(namebuf));
1123                 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1124                        if_indextoname(p->if_index, ifix_buf));
1125
1126                 gettimeofday(&time, 0);
1127                 /*
1128                  * meaning of fields, especially flags, is very different
1129                  * by origin.  notify the difference to the users.
1130                  */
1131                 printf("flags=%s%s%s%s%s",
1132                        p->raflags.onlink ? "L" : "",
1133                        p->raflags.autonomous ? "A" : "",
1134                        (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1135                        (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1136 #ifdef NDPRF_HOME
1137                        (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1138 #else
1139                        ""
1140 #endif
1141                        );
1142                 if (p->vltime == ND6_INFINITE_LIFETIME)
1143                         printf(" vltime=infinity");
1144                 else
1145                         printf(" vltime=%ld", (long)p->vltime);
1146                 if (p->pltime == ND6_INFINITE_LIFETIME)
1147                         printf(", pltime=infinity");
1148                 else
1149                         printf(", pltime=%ld", (long)p->pltime);
1150                 if (p->expire == 0)
1151                         printf(", expire=Never");
1152                 else if (p->expire >= time.tv_sec)
1153                         printf(", expire=%s",
1154                                 sec2str(p->expire - time.tv_sec));
1155                 else
1156                         printf(", expired");
1157                 printf(", ref=%d", p->refcnt);
1158                 printf("\n");
1159                 /*
1160                  * "advertising router" list is meaningful only if the prefix
1161                  * information is from RA.
1162                  */
1163                 if (p->advrtrs) {
1164                         int j;
1165                         struct sockaddr_in6 *sin6;
1166
1167                         sin6 = (struct sockaddr_in6 *)(p + 1);
1168                         printf("  advertised by\n");
1169                         for (j = 0; j < p->advrtrs; j++) {
1170                                 struct in6_nbrinfo *nbi;
1171
1172                                 if (getnameinfo((struct sockaddr *)sin6,
1173                                     sin6->sin6_len, namebuf, sizeof(namebuf),
1174                                     NULL, 0, ninflags) != 0)
1175                                         strlcpy(namebuf, "?", sizeof(namebuf));
1176                                 printf("    %s", namebuf);
1177
1178                                 nbi = getnbrinfo(&sin6->sin6_addr, p->if_index,
1179                                                  0);
1180                                 if (nbi) {
1181                                         switch(nbi->state) {
1182                                         case ND6_LLINFO_REACHABLE:
1183                                         case ND6_LLINFO_STALE:
1184                                         case ND6_LLINFO_DELAY:
1185                                         case ND6_LLINFO_PROBE:
1186                                                 printf(" (reachable)\n");
1187                                                 break;
1188                                         default:
1189                                                 printf(" (unreachable)\n");
1190                                         }
1191                                 } else
1192                                         printf(" (no neighbor state)\n");
1193                                 sin6++;
1194                         }
1195                 } else
1196                         printf("  No advertising router\n");
1197         }
1198         free(buf);
1199 #else
1200         struct in6_prlist pr;
1201         int s, i;
1202         struct timeval time;
1203
1204         gettimeofday(&time, 0);
1205
1206         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1207                 perror("ndp: socket");
1208                 exit(1);
1209         }
1210         bzero(&pr, sizeof(pr));
1211         strcpy(pr.ifname, "lo0"); /* dummy */
1212         if (ioctl(s, SIOCGPRLST_IN6, (caddr_t)&pr) < 0) {
1213                 perror("ioctl (SIOCGPRLST_IN6)");
1214                 exit(1);
1215         }
1216 #define PR pr.prefix[i]
1217         for (i = 0; PR.if_index && i < PRLSTSIZ ; i++) {
1218                 struct sockaddr_in6 p6;
1219                 char namebuf[NI_MAXHOST];
1220                 int niflags;
1221
1222 #ifdef NDPRF_ONLINK
1223                 p6 = PR.prefix;
1224 #else
1225                 memset(&p6, 0, sizeof(p6));
1226                 p6.sin6_family = AF_INET6;
1227                 p6.sin6_len = sizeof(p6);
1228                 p6.sin6_addr = PR.prefix;
1229 #endif
1230
1231                 /*
1232                  * copy link index to sin6_scope_id field.
1233                  * XXX: KAME specific.
1234                  */
1235                 if (IN6_IS_ADDR_LINKLOCAL(&p6.sin6_addr)) {
1236                         u_int16_t linkid;
1237
1238                         memcpy(&linkid, &p6.sin6_addr.s6_addr[2],
1239                                sizeof(linkid));
1240                         linkid = ntohs(linkid);
1241                         p6.sin6_scope_id = linkid;
1242                         p6.sin6_addr.s6_addr[2] = 0;
1243                         p6.sin6_addr.s6_addr[3] = 0;
1244                 }
1245
1246                 niflags = NI_NUMERICHOST;
1247 #ifdef __KAME__
1248                 niflags |= NI_WITHSCOPEID;
1249 #endif
1250                 if (getnameinfo((struct sockaddr *)&p6,
1251                                 sizeof(p6), namebuf, sizeof(namebuf),
1252                                 NULL, 0, niflags)) {
1253                         warnx("getnameinfo failed");
1254                         continue;
1255                 }
1256                 printf("%s/%d if=%s\n", namebuf, PR.prefixlen,
1257                        if_indextoname(PR.if_index, ifix_buf));
1258
1259                 gettimeofday(&time, 0);
1260                 /*
1261                  * meaning of fields, especially flags, is very different
1262                  * by origin.  notify the difference to the users.
1263                  */
1264 #if 0
1265                 printf("  %s",
1266                        PR.origin == PR_ORIG_RA ? "" : "advertise: ");
1267 #endif
1268 #ifdef NDPRF_ONLINK
1269                 printf("flags=%s%s%s%s%s",
1270                        PR.raflags.onlink ? "L" : "",
1271                        PR.raflags.autonomous ? "A" : "",
1272                        (PR.flags & NDPRF_ONLINK) != 0 ? "O" : "",
1273                        (PR.flags & NDPRF_DETACHED) != 0 ? "D" : "",
1274 #ifdef NDPRF_HOME
1275                        (PR.flags & NDPRF_HOME) != 0 ? "H" : ""
1276 #else
1277                        ""
1278 #endif
1279                        );
1280 #else
1281                 printf("flags=%s%s",
1282                        PR.raflags.onlink ? "L" : "",
1283                        PR.raflags.autonomous ? "A" : "");
1284 #endif
1285                 if (PR.vltime == ND6_INFINITE_LIFETIME)
1286                         printf(" vltime=infinity");
1287                 else
1288                         printf(" vltime=%ld", (long)PR.vltime);
1289                 if (PR.pltime == ND6_INFINITE_LIFETIME)
1290                         printf(", pltime=infinity");
1291                 else
1292                         printf(", pltime=%ld", (long)PR.pltime);
1293                 if (PR.expire == 0)
1294                         printf(", expire=Never");
1295                 else if (PR.expire >= time.tv_sec)
1296                         printf(", expire=%s",
1297                                 sec2str(PR.expire - time.tv_sec));
1298                 else
1299                         printf(", expired");
1300 #ifdef NDPRF_ONLINK
1301                 printf(", ref=%d", PR.refcnt);
1302 #endif
1303 #if 0
1304                 switch (PR.origin) {
1305                 case PR_ORIG_RA:
1306                         printf(", origin=RA");
1307                         break;
1308                 case PR_ORIG_RR:
1309                         printf(", origin=RR");
1310                         break;
1311                 case PR_ORIG_STATIC:
1312                         printf(", origin=static");
1313                         break;
1314                 case PR_ORIG_KERNEL:
1315                         printf(", origin=kernel");
1316                         break;
1317                 default:
1318                         printf(", origin=?");
1319                         break;
1320                 }
1321 #endif
1322                 printf("\n");
1323                 /*
1324                  * "advertising router" list is meaningful only if the prefix
1325                  * information is from RA.
1326                  */
1327                 if (0 &&        /* prefix origin is almost obsolted */
1328                     PR.origin != PR_ORIG_RA)
1329                         ;
1330                 else if (PR.advrtrs) {
1331                         int j;
1332                         printf("  advertised by\n");
1333                         for (j = 0; j < PR.advrtrs; j++) {
1334                                 struct sockaddr_in6 sin6;
1335                                 struct in6_nbrinfo *nbi;
1336
1337                                 bzero(&sin6, sizeof(sin6));
1338                                 sin6.sin6_family = AF_INET6;
1339                                 sin6.sin6_len = sizeof(sin6);
1340                                 sin6.sin6_addr = PR.advrtr[j];
1341                                 sin6.sin6_scope_id = PR.if_index; /* XXX */
1342                                 getnameinfo((struct sockaddr *)&sin6,
1343                                             sin6.sin6_len, host_buf,
1344                                             sizeof(host_buf), NULL, 0,
1345                                             NI_WITHSCOPEID | (nflag ? NI_NUMERICHOST : 0));
1346                                 printf("    %s", host_buf);
1347
1348                                 nbi = getnbrinfo(&sin6.sin6_addr, PR.if_index,
1349                                                  0);
1350                                 if (nbi) {
1351                                         switch(nbi->state) {
1352                                          case ND6_LLINFO_REACHABLE:
1353                                          case ND6_LLINFO_STALE:
1354                                          case ND6_LLINFO_DELAY:
1355                                          case ND6_LLINFO_PROBE:
1356                                                  printf(" (reachable)\n");
1357                                                  break;
1358                                          default:
1359                                                  printf(" (unreachable)\n");
1360                                         }
1361                                 } else
1362                                         printf(" (no neighbor state)\n");
1363                         }
1364                         if (PR.advrtrs > DRLSTSIZ)
1365                                 printf("    and %d routers\n",
1366                                        PR.advrtrs - DRLSTSIZ);
1367                 } else
1368                         printf("  No advertising router\n");
1369         }
1370 #undef PR
1371         close(s);
1372 #endif
1373 }
1374
1375 void
1376 pfx_flush(void)
1377 {
1378         char dummyif[IFNAMSIZ+8];
1379         int s;
1380
1381         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1382                 err(1, "socket");
1383         strcpy(dummyif, "lo0"); /* dummy */
1384         if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1385                 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1386 }
1387
1388 void
1389 rtr_flush(void)
1390 {
1391         char dummyif[IFNAMSIZ+8];
1392         int s;
1393
1394         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1395                 err(1, "socket");
1396         strcpy(dummyif, "lo0"); /* dummy */
1397         if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1398                 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1399
1400         close(s);
1401 }
1402
1403 void
1404 harmonize_rtr(void)
1405 {
1406         char dummyif[IFNAMSIZ+8];
1407         int s;
1408
1409         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1410                 err(1, "socket");
1411         strcpy(dummyif, "lo0"); /* dummy */
1412         if (ioctl(s, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1413                 err(1, "ioctl (SIOCSNDFLUSH_IN6)");
1414
1415         close(s);
1416 }
1417
1418 #ifdef SIOCSDEFIFACE_IN6        /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1419 static void
1420 setdefif(char *ifname)
1421 {
1422         struct in6_ndifreq ndifreq;
1423         unsigned int ifindex;
1424
1425         if (strcasecmp(ifname, "delete") == 0)
1426                 ifindex = 0;
1427         else {
1428                 if ((ifindex = if_nametoindex(ifname)) == 0)
1429                         err(1, "failed to resolve i/f index for %s", ifname);
1430         }
1431
1432         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1433                 err(1, "socket");
1434
1435         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1436         ndifreq.ifindex = ifindex;
1437
1438         if (ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1439                 err(1, "ioctl (SIOCSDEFIFACE_IN6)");
1440
1441         close(s);
1442 }
1443
1444 static void
1445 getdefif(void)
1446 {
1447         struct in6_ndifreq ndifreq;
1448         char ifname[IFNAMSIZ+8];
1449
1450         if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1451                 err(1, "socket");
1452
1453         memset(&ndifreq, 0, sizeof(ndifreq));
1454         strcpy(ndifreq.ifname, "lo0"); /* dummy */
1455
1456         if (ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1457                 err(1, "ioctl (SIOCGDEFIFACE_IN6)");
1458
1459         if (ndifreq.ifindex == 0)
1460                 printf("No default interface.\n");
1461         else {
1462                 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1463                         err(1, "failed to resolve ifname for index %lu",
1464                             ndifreq.ifindex);
1465                 printf("ND default interface = %s\n", ifname);
1466         }
1467
1468         close(s);
1469 }
1470 #endif
1471
1472 static char *
1473 sec2str(time_t total)
1474 {
1475         static char result[256];
1476         int days, hours, mins, secs;
1477         int first = 1;
1478         char *p = result;
1479
1480         days = total / 3600 / 24;
1481         hours = (total / 3600) % 24;
1482         mins = (total / 60) % 60;
1483         secs = total % 60;
1484
1485         if (days) {
1486                 first = 0;
1487                 p += sprintf(p, "%dd", days);
1488         }
1489         if (!first || hours) {
1490                 first = 0;
1491                 p += sprintf(p, "%dh", hours);
1492         }
1493         if (!first || mins) {
1494                 first = 0;
1495                 p += sprintf(p, "%dm", mins);
1496         }
1497         sprintf(p, "%ds", secs);
1498
1499         return(result);
1500 }
1501
1502 /*
1503  * Print the timestamp
1504  * from tcpdump/util.c
1505  */
1506 static void
1507 ts_print(const struct timeval *tvp)
1508 {
1509         int s;
1510
1511         /* Default */
1512         s = (tvp->tv_sec + thiszone) % 86400;
1513         printf("%02d:%02d:%02d.%06u ",
1514             s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tvp->tv_usec);
1515 }