1 /* $FreeBSD$ */
2 /* $KAME: ndp.c,v 1.104 2003/06/27 07:48:39 itojun Exp $ */
3
4 /*-
5 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the project nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34 /*
35 * Copyright (c) 1984, 1993
36 * The Regents of the University of California. All rights reserved.
37 *
38 * This code is derived from software contributed to Berkeley by
39 * Sun Microsystems, Inc.
40 *
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
43 * are met:
44 * 1. Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in the
48 * documentation and/or other materials provided with the distribution.
49 * 3. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * SUCH DAMAGE.
64 */
65
66 /*
67 * Based on:
68 * "@(#) Copyright (c) 1984, 1993\n\
69 * The Regents of the University of California. All rights reserved.\n";
70 *
71 * "@(#)arp.c 8.2 (Berkeley) 1/2/94";
72 */
73
74 /*
75 * ndp - display, set, delete and flush neighbor cache
76 */
77
78
79 #include <sys/param.h>
80 #include <sys/file.h>
81 #include <sys/ioctl.h>
82 #include <sys/socket.h>
83 #include <sys/sysctl.h>
84 #include <sys/time.h>
85 #include <sys/queue.h>
86
87 #include <net/if.h>
88 #include <net/if_dl.h>
89 #include <net/if_types.h>
90 #include <net/route.h>
91
92 #include <netinet/in.h>
93 #include <netinet/if_ether.h>
94
95 #include <netinet/icmp6.h>
96 #include <netinet6/in6_var.h>
97 #include <netinet6/nd6.h>
98
99 #include <arpa/inet.h>
100
101 #include <ctype.h>
102 #include <netdb.h>
103 #include <errno.h>
104 #include <nlist.h>
105 #include <stdio.h>
106 #include <string.h>
107 #include <paths.h>
108 #include <err.h>
109 #include <stdlib.h>
110 #include <fcntl.h>
111 #include <unistd.h>
112 #include "gmt2local.h"
113
114 #define NEXTADDR(w, s) \
115 if (rtm->rtm_addrs & (w)) { \
116 bcopy((char *)&s, cp, sizeof(s)); \
117 cp += SA_SIZE(&s); \
118 }
119
120 static pid_t pid;
121 static int nflag;
122 static int tflag;
123 static int32_t thiszone; /* time difference with gmt */
124 static int s = -1;
125 static int repeat = 0;
126
127 static char host_buf[NI_MAXHOST]; /* getnameinfo() */
128 static char ifix_buf[IFNAMSIZ]; /* if_indextoname() */
129
130 static int file(char *);
131 static void getsocket(void);
132 static int set(int, char **);
133 static void get(char *);
134 static int delete(char *);
135 static void dump(struct sockaddr_in6 *, int);
136 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
137 static char *ether_str(struct sockaddr_dl *);
138 static int ndp_ether_aton(char *, u_char *);
139 static void usage(void);
140 static int rtmsg(int);
141 static void ifinfo(char *, int, char **);
142 static void rtrlist(void);
143 static void plist(void);
144 static void pfx_flush(void);
145 static void rtr_flush(void);
146 static void harmonize_rtr(void);
147 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */
148 static void getdefif(void);
149 static void setdefif(char *);
150 #endif
151 static char *sec2str(time_t);
152 static void ts_print(const struct timeval *);
153
154 static const char *rtpref_str[] = {
155 "medium", /* 00 */
156 "high", /* 01 */
157 "rsv", /* 10 */
158 "low" /* 11 */
159 };
160
161 int
main(int argc,char ** argv)162 main(int argc, char **argv)
163 {
164 int ch, mode = 0;
165 char *arg = NULL;
166
167 pid = getpid();
168 thiszone = gmt2local(0);
169 while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
170 switch (ch) {
171 case 'a':
172 case 'c':
173 case 'p':
174 case 'r':
175 case 'H':
176 case 'P':
177 case 'R':
178 case 's':
179 case 'I':
180 if (mode) {
181 usage();
182 /*NOTREACHED*/
183 }
184 mode = ch;
185 arg = NULL;
186 break;
187 case 'f':
188 exit(file(optarg) ? 1 : 0);
189 case 'd':
190 case 'i':
191 if (mode) {
192 usage();
193 /*NOTREACHED*/
194 }
195 mode = ch;
196 arg = optarg;
197 break;
198 case 'n':
199 nflag = 1;
200 break;
201 case 't':
202 tflag = 1;
203 break;
204 case 'A':
205 if (mode) {
206 usage();
207 /*NOTREACHED*/
208 }
209 mode = 'a';
210 repeat = atoi(optarg);
211 if (repeat < 0) {
212 usage();
213 /*NOTREACHED*/
214 }
215 break;
216 default:
217 usage();
218 }
219
220 argc -= optind;
221 argv += optind;
222
223 switch (mode) {
224 case 'a':
225 case 'c':
226 if (argc != 0) {
227 usage();
228 /*NOTREACHED*/
229 }
230 dump(0, mode == 'c');
231 break;
232 case 'd':
233 if (argc != 0) {
234 usage();
235 /*NOTREACHED*/
236 }
237 delete(arg);
238 break;
239 case 'I':
240 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */
241 if (argc > 1) {
242 usage();
243 /*NOTREACHED*/
244 } else if (argc == 1) {
245 if (strcmp(*argv, "delete") == 0 ||
246 if_nametoindex(*argv))
247 setdefif(*argv);
248 else
249 errx(1, "invalid interface %s", *argv);
250 }
251 getdefif(); /* always call it to print the result */
252 break;
253 #else
254 errx(1, "not supported yet");
255 /*NOTREACHED*/
256 #endif
257 case 'p':
258 if (argc != 0) {
259 usage();
260 /*NOTREACHED*/
261 }
262 plist();
263 break;
264 case 'i':
265 ifinfo(arg, argc, argv);
266 break;
267 case 'r':
268 if (argc != 0) {
269 usage();
270 /*NOTREACHED*/
271 }
272 rtrlist();
273 break;
274 case 's':
275 if (argc < 2 || argc > 4)
276 usage();
277 exit(set(argc, argv) ? 1 : 0);
278 case 'H':
279 if (argc != 0) {
280 usage();
281 /*NOTREACHED*/
282 }
283 harmonize_rtr();
284 break;
285 case 'P':
286 if (argc != 0) {
287 usage();
288 /*NOTREACHED*/
289 }
290 pfx_flush();
291 break;
292 case 'R':
293 if (argc != 0) {
294 usage();
295 /*NOTREACHED*/
296 }
297 rtr_flush();
298 break;
299 case 0:
300 if (argc != 1) {
301 usage();
302 /*NOTREACHED*/
303 }
304 get(argv[0]);
305 break;
306 }
307 exit(0);
308 }
309
310 /*
311 * Process a file to set standard ndp entries
312 */
313 static int
file(char * name)314 file(char *name)
315 {
316 FILE *fp;
317 int i, retval;
318 char line[100], arg[5][50], *args[5], *p;
319
320 if ((fp = fopen(name, "r")) == NULL)
321 err(1, "cannot open %s", name);
322 args[0] = &arg[0][0];
323 args[1] = &arg[1][0];
324 args[2] = &arg[2][0];
325 args[3] = &arg[3][0];
326 args[4] = &arg[4][0];
327 retval = 0;
328 while (fgets(line, sizeof(line), fp) != NULL) {
329 if ((p = strchr(line, '#')) != NULL)
330 *p = '\0';
331 for (p = line; isblank(*p); p++);
332 if (*p == '\n' || *p == '\0')
333 continue;
334 i = sscanf(line, "%49s %49s %49s %49s %49s",
335 arg[0], arg[1], arg[2], arg[3], arg[4]);
336 if (i < 2) {
337 warnx("bad line: %s", line);
338 retval = 1;
339 continue;
340 }
341 if (set(i, args))
342 retval = 1;
343 }
344 fclose(fp);
345 return (retval);
346 }
347
348 static void
getsocket()349 getsocket()
350 {
351 if (s < 0) {
352 s = socket(PF_ROUTE, SOCK_RAW, 0);
353 if (s < 0) {
354 err(1, "socket");
355 /* NOTREACHED */
356 }
357 }
358 }
359
360 static struct sockaddr_in6 so_mask = {
361 .sin6_len = sizeof(so_mask),
362 .sin6_family = AF_INET6
363 };
364 static struct sockaddr_in6 blank_sin = {
365 .sin6_len = sizeof(blank_sin),
366 .sin6_family = AF_INET6
367 };
368 static struct sockaddr_in6 sin_m;
369 static struct sockaddr_dl blank_sdl = {
370 .sdl_len = sizeof(blank_sdl),
371 .sdl_family = AF_LINK
372 };
373 static struct sockaddr_dl sdl_m;
374 static time_t expire_time;
375 static int flags, found_entry;
376 static struct {
377 struct rt_msghdr m_rtm;
378 char m_space[512];
379 } m_rtmsg;
380
381 /*
382 * Set an individual neighbor cache entry
383 */
384 static int
set(int argc,char ** argv)385 set(int argc, char **argv)
386 {
387 register struct sockaddr_in6 *sin = &sin_m;
388 register struct sockaddr_dl *sdl;
389 register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
390 struct addrinfo hints, *res;
391 int gai_error;
392 u_char *ea;
393 char *host = argv[0], *eaddr = argv[1];
394
395 getsocket();
396 argc -= 2;
397 argv += 2;
398 sdl_m = blank_sdl;
399 sin_m = blank_sin;
400
401 bzero(&hints, sizeof(hints));
402 hints.ai_family = AF_INET6;
403 gai_error = getaddrinfo(host, NULL, &hints, &res);
404 if (gai_error) {
405 fprintf(stderr, "ndp: %s: %s\n", host,
406 gai_strerror(gai_error));
407 return 1;
408 }
409 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
410 sin->sin6_scope_id =
411 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
412 ea = (u_char *)LLADDR(&sdl_m);
413 if (ndp_ether_aton(eaddr, ea) == 0)
414 sdl_m.sdl_alen = 6;
415 flags = expire_time = 0;
416 while (argc-- > 0) {
417 if (strncmp(argv[0], "temp", 4) == 0) {
418 struct timeval now;
419
420 gettimeofday(&now, 0);
421 expire_time = now.tv_sec + 20 * 60;
422 } else if (strncmp(argv[0], "proxy", 5) == 0)
423 flags |= RTF_ANNOUNCE;
424 argv++;
425 }
426 if (rtmsg(RTM_GET) < 0) {
427 errx(1, "RTM_GET(%s) failed", host);
428 /* NOTREACHED */
429 }
430 sin = (struct sockaddr_in6 *)(rtm + 1);
431 sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
432 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
433 if (sdl->sdl_family == AF_LINK &&
434 !(rtm->rtm_flags & RTF_GATEWAY)) {
435 switch (sdl->sdl_type) {
436 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
437 case IFT_ISO88024: case IFT_ISO88025:
438 case IFT_L2VLAN: case IFT_BRIDGE:
439 goto overwrite;
440 }
441 }
442 fprintf(stderr, "set: cannot configure a new entry\n");
443 return 1;
444 }
445
446 overwrite:
447 if (sdl->sdl_family != AF_LINK) {
448 printf("cannot intuit interface index and type for %s\n", host);
449 return (1);
450 }
451 sdl_m.sdl_type = sdl->sdl_type;
452 sdl_m.sdl_index = sdl->sdl_index;
453 return (rtmsg(RTM_ADD));
454 }
455
456 /*
457 * Display an individual neighbor cache entry
458 */
459 static void
get(char * host)460 get(char *host)
461 {
462 struct sockaddr_in6 *sin = &sin_m;
463 struct addrinfo hints, *res;
464 int gai_error;
465
466 sin_m = blank_sin;
467 bzero(&hints, sizeof(hints));
468 hints.ai_family = AF_INET6;
469 gai_error = getaddrinfo(host, NULL, &hints, &res);
470 if (gai_error) {
471 fprintf(stderr, "ndp: %s: %s\n", host,
472 gai_strerror(gai_error));
473 return;
474 }
475 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
476 sin->sin6_scope_id =
477 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
478 dump(sin, 0);
479 if (found_entry == 0) {
480 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
481 sizeof(host_buf), NULL ,0,
482 (nflag ? NI_NUMERICHOST : 0));
483 printf("%s (%s) -- no entry\n", host, host_buf);
484 exit(1);
485 }
486 }
487
488 /*
489 * Delete a neighbor cache entry
490 */
491 static int
delete(char * host)492 delete(char *host)
493 {
494 struct sockaddr_in6 *sin = &sin_m;
495 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
496 register char *cp = m_rtmsg.m_space;
497 struct sockaddr_dl *sdl;
498 struct addrinfo hints, *res;
499 int gai_error;
500
501 getsocket();
502 sin_m = blank_sin;
503
504 bzero(&hints, sizeof(hints));
505 hints.ai_family = AF_INET6;
506 gai_error = getaddrinfo(host, NULL, &hints, &res);
507 if (gai_error) {
508 fprintf(stderr, "ndp: %s: %s\n", host,
509 gai_strerror(gai_error));
510 return 1;
511 }
512 sin->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
513 sin->sin6_scope_id =
514 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
515 if (rtmsg(RTM_GET) < 0) {
516 errx(1, "RTM_GET(%s) failed", host);
517 /* NOTREACHED */
518 }
519 sin = (struct sockaddr_in6 *)(rtm + 1);
520 sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
521 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
522 if (sdl->sdl_family == AF_LINK &&
523 !(rtm->rtm_flags & RTF_GATEWAY)) {
524 goto delete;
525 }
526 fprintf(stderr, "delete: cannot delete non-NDP entry\n");
527 return 1;
528 }
529
530 delete:
531 if (sdl->sdl_family != AF_LINK) {
532 printf("cannot locate %s\n", host);
533 return (1);
534 }
535 /*
536 * need to reinit the field because it has rt_key
537 * but we want the actual address
538 */
539 NEXTADDR(RTA_DST, sin_m);
540 rtm->rtm_flags |= RTF_LLDATA;
541 if (rtmsg(RTM_DELETE) == 0) {
542 getnameinfo((struct sockaddr *)sin,
543 sin->sin6_len, host_buf,
544 sizeof(host_buf), NULL, 0,
545 (nflag ? NI_NUMERICHOST : 0));
546 printf("%s (%s) deleted\n", host, host_buf);
547 }
548
549 return 0;
550 }
551
552 #define W_ADDR 36
553 #define W_LL 17
554 #define W_IF 6
555
556 /*
557 * Dump the entire neighbor cache
558 */
559 static void
dump(struct sockaddr_in6 * addr,int cflag)560 dump(struct sockaddr_in6 *addr, int cflag)
561 {
562 int mib[6];
563 size_t needed;
564 char *lim, *buf, *next;
565 struct rt_msghdr *rtm;
566 struct sockaddr_in6 *sin;
567 struct sockaddr_dl *sdl;
568 struct timeval now;
569 time_t expire;
570 int addrwidth;
571 int llwidth;
572 int ifwidth;
573 char flgbuf[8];
574 char *ifname;
575
576 /* Print header */
577 if (!tflag && !cflag)
578 printf("%-*.*s %-*.*s %*.*s %-9.9s %1s %5s\n",
579 W_ADDR, W_ADDR, "Neighbor", W_LL, W_LL, "Linklayer Address",
580 W_IF, W_IF, "Netif", "Expire", "S", "Flags");
581
582 again:;
583 mib[0] = CTL_NET;
584 mib[1] = PF_ROUTE;
585 mib[2] = 0;
586 mib[3] = AF_INET6;
587 mib[4] = NET_RT_FLAGS;
588 #ifdef RTF_LLINFO
589 mib[5] = RTF_LLINFO;
590 #else
591 mib[5] = 0;
592 #endif
593 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
594 err(1, "sysctl(PF_ROUTE estimate)");
595 if (needed > 0) {
596 if ((buf = malloc(needed)) == NULL)
597 err(1, "malloc");
598 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
599 err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
600 lim = buf + needed;
601 } else
602 buf = lim = NULL;
603
604 for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
605 int isrouter = 0, prbs = 0;
606
607 rtm = (struct rt_msghdr *)next;
608 sin = (struct sockaddr_in6 *)(rtm + 1);
609 sdl = (struct sockaddr_dl *)((char *)sin +
610 ALIGN(sin->sin6_len));
611
612 /*
613 * Some OSes can produce a route that has the LINK flag but
614 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
615 * and BSD/OS, where xx is not the interface identifier on
616 * lo0). Such routes entry would annoy getnbrinfo() below,
617 * so we skip them.
618 * XXX: such routes should have the GATEWAY flag, not the
619 * LINK flag. However, there is rotten routing software
620 * that advertises all routes that have the GATEWAY flag.
621 * Thus, KAME kernel intentionally does not set the LINK flag.
622 * What is to be fixed is not ndp, but such routing software
623 * (and the kernel workaround)...
624 */
625 if (sdl->sdl_family != AF_LINK)
626 continue;
627
628 if (!(rtm->rtm_flags & RTF_HOST))
629 continue;
630
631 if (addr) {
632 if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr,
633 &sin->sin6_addr) == 0 ||
634 addr->sin6_scope_id != sin->sin6_scope_id)
635 continue;
636 found_entry = 1;
637 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
638 continue;
639 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
640 IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
641 /* XXX: should scope id be filled in the kernel? */
642 if (sin->sin6_scope_id == 0)
643 sin->sin6_scope_id = sdl->sdl_index;
644 }
645 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
646 sizeof(host_buf), NULL, 0, (nflag ? NI_NUMERICHOST : 0));
647 if (cflag) {
648 #ifdef RTF_WASCLONED
649 if (rtm->rtm_flags & RTF_WASCLONED)
650 delete(host_buf);
651 #elif defined(RTF_CLONED)
652 if (rtm->rtm_flags & RTF_CLONED)
653 delete(host_buf);
654 #else
655 if (rtm->rtm_flags & RTF_PINNED)
656 continue;
657 delete(host_buf);
658 #endif
659 continue;
660 }
661 gettimeofday(&now, 0);
662 if (tflag)
663 ts_print(&now);
664
665 addrwidth = strlen(host_buf);
666 if (addrwidth < W_ADDR)
667 addrwidth = W_ADDR;
668 llwidth = strlen(ether_str(sdl));
669 if (W_ADDR + W_LL - addrwidth > llwidth)
670 llwidth = W_ADDR + W_LL - addrwidth;
671 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
672 if (ifname == NULL) {
673 strlcpy(ifix_buf, "?", sizeof(ifix_buf));
674 ifname = ifix_buf;
675 }
676 ifwidth = strlen(ifname);
677 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
678 ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
679
680 printf("%-*.*s %-*.*s %*.*s", addrwidth, addrwidth, host_buf,
681 llwidth, llwidth, ether_str(sdl), ifwidth, ifwidth, ifname);
682
683 /* Print neighbor discovery specific information */
684 expire = rtm->rtm_rmx.rmx_expire;
685 if (expire > now.tv_sec)
686 printf(" %-9.9s", sec2str(expire - now.tv_sec));
687 else if (expire == 0)
688 printf(" %-9.9s", "permanent");
689 else
690 printf(" %-9.9s", "expired");
691
692 switch (rtm->rtm_rmx.rmx_state) {
693 case ND6_LLINFO_NOSTATE:
694 printf(" N");
695 break;
696 #ifdef ND6_LLINFO_WAITDELETE
697 case ND6_LLINFO_WAITDELETE:
698 printf(" W");
699 break;
700 #endif
701 case ND6_LLINFO_INCOMPLETE:
702 printf(" I");
703 break;
704 case ND6_LLINFO_REACHABLE:
705 printf(" R");
706 break;
707 case ND6_LLINFO_STALE:
708 printf(" S");
709 break;
710 case ND6_LLINFO_DELAY:
711 printf(" D");
712 break;
713 case ND6_LLINFO_PROBE:
714 printf(" P");
715 break;
716 default:
717 printf(" ?");
718 break;
719 }
720
721 isrouter = rtm->rtm_flags & RTF_GATEWAY;
722 prbs = rtm->rtm_rmx.rmx_pksent;
723
724 /*
725 * other flags. R: router, P: proxy, W: ??
726 */
727 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
728 snprintf(flgbuf, sizeof(flgbuf), "%s%s",
729 isrouter ? "R" : "",
730 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
731 } else {
732 #if 0 /* W and P are mystery even for us */
733 sin = (struct sockaddr_in6 *)
734 (sdl->sdl_len + (char *)sdl);
735 snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
736 isrouter ? "R" : "",
737 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
738 (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
739 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
740 #else
741 snprintf(flgbuf, sizeof(flgbuf), "%s%s",
742 isrouter ? "R" : "",
743 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
744 #endif
745 }
746 printf(" %s", flgbuf);
747
748 if (prbs)
749 printf(" %d", prbs);
750
751 printf("\n");
752 }
753 if (buf != NULL)
754 free(buf);
755
756 if (repeat) {
757 printf("\n");
758 fflush(stdout);
759 sleep(repeat);
760 goto again;
761 }
762 }
763
764 static struct in6_nbrinfo *
getnbrinfo(struct in6_addr * addr,int ifindex,int warning)765 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
766 {
767 static struct in6_nbrinfo nbi;
768 int sock;
769
770 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
771 err(1, "socket");
772
773 bzero(&nbi, sizeof(nbi));
774 if_indextoname(ifindex, nbi.ifname);
775 nbi.addr = *addr;
776 if (ioctl(sock, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
777 if (warning)
778 warn("ioctl(SIOCGNBRINFO_IN6)");
779 close(sock);
780 return(NULL);
781 }
782
783 close(sock);
784 return(&nbi);
785 }
786
787 static char *
ether_str(struct sockaddr_dl * sdl)788 ether_str(struct sockaddr_dl *sdl)
789 {
790 static char hbuf[NI_MAXHOST];
791
792 if (sdl->sdl_alen == ETHER_ADDR_LEN) {
793 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
794 sizeof(hbuf));
795 } else if (sdl->sdl_alen) {
796 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
797 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
798 } else
799 snprintf(hbuf, sizeof(hbuf), "(incomplete)");
800
801 return(hbuf);
802 }
803
804 static int
ndp_ether_aton(char * a,u_char * n)805 ndp_ether_aton(char *a, u_char *n)
806 {
807 int i, o[6];
808
809 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
810 &o[3], &o[4], &o[5]);
811 if (i != 6) {
812 fprintf(stderr, "ndp: invalid Ethernet address '%s'\n", a);
813 return (1);
814 }
815 for (i = 0; i < 6; i++)
816 n[i] = o[i];
817 return (0);
818 }
819
820 static void
usage()821 usage()
822 {
823 printf("usage: ndp [-nt] hostname\n");
824 printf(" ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
825 printf(" ndp [-nt] -A wait\n");
826 printf(" ndp [-nt] -d hostname\n");
827 printf(" ndp [-nt] -f filename\n");
828 printf(" ndp [-nt] -i interface [flags...]\n");
829 #ifdef SIOCSDEFIFACE_IN6
830 printf(" ndp [-nt] -I [interface|delete]\n");
831 #endif
832 printf(" ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
833 exit(1);
834 }
835
836 static int
rtmsg(int cmd)837 rtmsg(int cmd)
838 {
839 static int seq;
840 int rlen;
841 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
842 register char *cp = m_rtmsg.m_space;
843 register int l;
844
845 errno = 0;
846 if (cmd == RTM_DELETE)
847 goto doit;
848 bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
849 rtm->rtm_flags = flags;
850 rtm->rtm_version = RTM_VERSION;
851
852 switch (cmd) {
853 default:
854 fprintf(stderr, "ndp: internal wrong cmd\n");
855 exit(1);
856 case RTM_ADD:
857 rtm->rtm_addrs |= RTA_GATEWAY;
858 if (expire_time) {
859 rtm->rtm_rmx.rmx_expire = expire_time;
860 rtm->rtm_inits = RTV_EXPIRE;
861 }
862 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
863 /* FALLTHROUGH */
864 case RTM_GET:
865 rtm->rtm_addrs |= RTA_DST;
866 }
867
868 NEXTADDR(RTA_DST, sin_m);
869 NEXTADDR(RTA_GATEWAY, sdl_m);
870
871 rtm->rtm_msglen = cp - (char *)&m_rtmsg;
872 doit:
873 l = rtm->rtm_msglen;
874 rtm->rtm_seq = ++seq;
875 rtm->rtm_type = cmd;
876 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
877 if (errno != ESRCH || cmd != RTM_DELETE) {
878 err(1, "writing to routing socket");
879 /* NOTREACHED */
880 }
881 }
882 do {
883 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
884 } while (l > 0 && (rtm->rtm_type != cmd || rtm->rtm_seq != seq ||
885 rtm->rtm_pid != pid));
886 if (l < 0)
887 (void) fprintf(stderr, "ndp: read from routing socket: %s\n",
888 strerror(errno));
889 return (0);
890 }
891
892 static void
ifinfo(char * ifname,int argc,char ** argv)893 ifinfo(char *ifname, int argc, char **argv)
894 {
895 struct in6_ndireq nd;
896 int i, sock;
897 u_int32_t newflags;
898 #ifdef IPV6CTL_USETEMPADDR
899 u_int8_t nullbuf[8];
900 #endif
901
902 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
903 err(1, "socket");
904 /* NOTREACHED */
905 }
906 bzero(&nd, sizeof(nd));
907 strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
908 if (ioctl(sock, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
909 err(1, "ioctl(SIOCGIFINFO_IN6)");
910 /* NOTREACHED */
911 }
912 #define ND nd.ndi
913 newflags = ND.flags;
914 for (i = 0; i < argc; i++) {
915 int clear = 0;
916 char *cp = argv[i];
917
918 if (*cp == '-') {
919 clear = 1;
920 cp++;
921 }
922
923 #define SETFLAG(s, f) do { \
924 if (strcmp(cp, (s)) == 0) { \
925 if (clear) \
926 newflags &= ~(f); \
927 else \
928 newflags |= (f); \
929 } \
930 } while (0)
931 /*
932 * XXX: this macro is not 100% correct, in that it matches "nud" against
933 * "nudbogus". But we just let it go since this is minor.
934 */
935 #define SETVALUE(f, v) do { \
936 char *valptr; \
937 unsigned long newval; \
938 v = 0; /* unspecified */ \
939 if (strncmp(cp, f, strlen(f)) == 0) { \
940 valptr = strchr(cp, '='); \
941 if (valptr == NULL) \
942 err(1, "syntax error in %s field", (f)); \
943 errno = 0; \
944 newval = strtoul(++valptr, NULL, 0); \
945 if (errno) \
946 err(1, "syntax error in %s's value", (f)); \
947 v = newval; \
948 } \
949 } while (0)
950
951 SETFLAG("disabled", ND6_IFF_IFDISABLED);
952 SETFLAG("nud", ND6_IFF_PERFORMNUD);
953 #ifdef ND6_IFF_ACCEPT_RTADV
954 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
955 #endif
956 #ifdef ND6_IFF_AUTO_LINKLOCAL
957 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
958 #endif
959 #ifdef ND6_IFF_NO_PREFER_IFACE
960 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
961 #endif
962 SETVALUE("basereachable", ND.basereachable);
963 SETVALUE("retrans", ND.retrans);
964 SETVALUE("curhlim", ND.chlim);
965
966 ND.flags = newflags;
967 if (ioctl(sock, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
968 err(1, "ioctl(SIOCSIFINFO_IN6)");
969 /* NOTREACHED */
970 }
971 #undef SETFLAG
972 #undef SETVALUE
973 }
974
975 if (!ND.initialized) {
976 errx(1, "%s: not initialized yet", ifname);
977 /* NOTREACHED */
978 }
979
980 if (ioctl(sock, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
981 err(1, "ioctl(SIOCGIFINFO_IN6)");
982 /* NOTREACHED */
983 }
984 printf("linkmtu=%d", ND.linkmtu);
985 printf(", maxmtu=%d", ND.maxmtu);
986 printf(", curhlim=%d", ND.chlim);
987 printf(", basereachable=%ds%dms",
988 ND.basereachable / 1000, ND.basereachable % 1000);
989 printf(", reachable=%ds", ND.reachable);
990 printf(", retrans=%ds%dms", ND.retrans / 1000, ND.retrans % 1000);
991 #ifdef IPV6CTL_USETEMPADDR
992 memset(nullbuf, 0, sizeof(nullbuf));
993 if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
994 int j;
995 u_int8_t *rbuf;
996
997 for (i = 0; i < 3; i++) {
998 switch (i) {
999 case 0:
1000 printf("\nRandom seed(0): ");
1001 rbuf = ND.randomseed0;
1002 break;
1003 case 1:
1004 printf("\nRandom seed(1): ");
1005 rbuf = ND.randomseed1;
1006 break;
1007 case 2:
1008 printf("\nRandom ID: ");
1009 rbuf = ND.randomid;
1010 break;
1011 default:
1012 errx(1, "impossible case for tempaddr display");
1013 }
1014 for (j = 0; j < 8; j++)
1015 printf("%02x", rbuf[j]);
1016 }
1017 }
1018 #endif /* IPV6CTL_USETEMPADDR */
1019 if (ND.flags) {
1020 printf("\nFlags: ");
1021 #ifdef ND6_IFF_IFDISABLED
1022 if ((ND.flags & ND6_IFF_IFDISABLED))
1023 printf("disabled ");
1024 #endif
1025 if ((ND.flags & ND6_IFF_PERFORMNUD))
1026 printf("nud ");
1027 #ifdef ND6_IFF_ACCEPT_RTADV
1028 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1029 printf("accept_rtadv ");
1030 #endif
1031 #ifdef ND6_IFF_AUTO_LINKLOCAL
1032 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1033 printf("auto_linklocal ");
1034 #endif
1035 #ifdef ND6_IFF_NO_PREFER_IFACE
1036 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1037 printf("no_prefer_iface ");
1038 #endif
1039 }
1040 putc('\n', stdout);
1041 #undef ND
1042
1043 close(sock);
1044 }
1045
1046 #ifndef ND_RA_FLAG_RTPREF_MASK /* XXX: just for compilation on *BSD release */
1047 #define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
1048 #endif
1049
1050 static void
rtrlist()1051 rtrlist()
1052 {
1053 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1054 char *buf;
1055 struct in6_defrouter *p, *ep;
1056 size_t l;
1057 struct timeval now;
1058
1059 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1060 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1061 /*NOTREACHED*/
1062 }
1063 if (l == 0)
1064 return;
1065 buf = malloc(l);
1066 if (!buf) {
1067 err(1, "malloc");
1068 /*NOTREACHED*/
1069 }
1070 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1071 err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1072 /*NOTREACHED*/
1073 }
1074
1075 ep = (struct in6_defrouter *)(buf + l);
1076 for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1077 int rtpref;
1078
1079 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1080 p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1081 (nflag ? NI_NUMERICHOST : 0)) != 0)
1082 strlcpy(host_buf, "?", sizeof(host_buf));
1083
1084 printf("%s if=%s", host_buf,
1085 if_indextoname(p->if_index, ifix_buf));
1086 printf(", flags=%s%s",
1087 p->flags & ND_RA_FLAG_MANAGED ? "M" : "",
1088 p->flags & ND_RA_FLAG_OTHER ? "O" : "");
1089 #ifdef DRAFT_IETF_6MAN_IPV6ONLY_FLAG
1090 printf("%s", p->flags & ND_RA_FLAG_IPV6_ONLY ? "S" : "");
1091 #endif
1092 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1093 printf(", pref=%s", rtpref_str[rtpref]);
1094
1095 gettimeofday(&now, 0);
1096 if (p->expire == 0)
1097 printf(", expire=Never\n");
1098 else
1099 printf(", expire=%s\n",
1100 sec2str(p->expire - now.tv_sec));
1101 }
1102 free(buf);
1103 }
1104
1105 static void
plist()1106 plist()
1107 {
1108 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1109 char *buf;
1110 struct in6_prefix *p, *ep, *n;
1111 struct sockaddr_in6 *advrtr;
1112 size_t l;
1113 struct timeval now;
1114 const int niflags = NI_NUMERICHOST;
1115 int ninflags = nflag ? NI_NUMERICHOST : 0;
1116 char namebuf[NI_MAXHOST];
1117
1118 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &l, NULL, 0) < 0) {
1119 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1120 /*NOTREACHED*/
1121 }
1122 buf = malloc(l);
1123 if (!buf) {
1124 err(1, "malloc");
1125 /*NOTREACHED*/
1126 }
1127 if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &l, NULL, 0) < 0) {
1128 err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1129 /*NOTREACHED*/
1130 }
1131
1132 ep = (struct in6_prefix *)(buf + l);
1133 for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1134 advrtr = (struct sockaddr_in6 *)(p + 1);
1135 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1136
1137 if (getnameinfo((struct sockaddr *)&p->prefix,
1138 p->prefix.sin6_len, namebuf, sizeof(namebuf),
1139 NULL, 0, niflags) != 0)
1140 strlcpy(namebuf, "?", sizeof(namebuf));
1141 printf("%s/%d if=%s\n", namebuf, p->prefixlen,
1142 if_indextoname(p->if_index, ifix_buf));
1143
1144 gettimeofday(&now, 0);
1145 /*
1146 * meaning of fields, especially flags, is very different
1147 * by origin. notify the difference to the users.
1148 */
1149 printf("flags=%s%s%s%s%s",
1150 p->raflags.onlink ? "L" : "",
1151 p->raflags.autonomous ? "A" : "",
1152 (p->flags & NDPRF_ONLINK) != 0 ? "O" : "",
1153 (p->flags & NDPRF_DETACHED) != 0 ? "D" : "",
1154 #ifdef NDPRF_HOME
1155 (p->flags & NDPRF_HOME) != 0 ? "H" : ""
1156 #else
1157 ""
1158 #endif
1159 );
1160 if (p->vltime == ND6_INFINITE_LIFETIME)
1161 printf(" vltime=infinity");
1162 else
1163 printf(" vltime=%lu", (unsigned long)p->vltime);
1164 if (p->pltime == ND6_INFINITE_LIFETIME)
1165 printf(", pltime=infinity");
1166 else
1167 printf(", pltime=%lu", (unsigned long)p->pltime);
1168 if (p->expire == 0)
1169 printf(", expire=Never");
1170 else if (p->expire >= now.tv_sec)
1171 printf(", expire=%s",
1172 sec2str(p->expire - now.tv_sec));
1173 else
1174 printf(", expired");
1175 printf(", ref=%d", p->refcnt);
1176 printf("\n");
1177 /*
1178 * "advertising router" list is meaningful only if the prefix
1179 * information is from RA.
1180 */
1181 if (p->advrtrs) {
1182 int j;
1183 struct sockaddr_in6 *sin6;
1184
1185 sin6 = advrtr;
1186 printf(" advertised by\n");
1187 for (j = 0; j < p->advrtrs; j++) {
1188 struct in6_nbrinfo *nbi;
1189
1190 if (getnameinfo((struct sockaddr *)sin6,
1191 sin6->sin6_len, namebuf, sizeof(namebuf),
1192 NULL, 0, ninflags) != 0)
1193 strlcpy(namebuf, "?", sizeof(namebuf));
1194 printf(" %s", namebuf);
1195
1196 nbi = getnbrinfo(&sin6->sin6_addr,
1197 p->if_index, 0);
1198 if (nbi) {
1199 switch (nbi->state) {
1200 case ND6_LLINFO_REACHABLE:
1201 case ND6_LLINFO_STALE:
1202 case ND6_LLINFO_DELAY:
1203 case ND6_LLINFO_PROBE:
1204 printf(" (reachable)\n");
1205 break;
1206 default:
1207 printf(" (unreachable)\n");
1208 }
1209 } else
1210 printf(" (no neighbor state)\n");
1211 sin6++;
1212 }
1213 } else
1214 printf(" No advertising router\n");
1215 }
1216 free(buf);
1217 }
1218
1219 static void
pfx_flush()1220 pfx_flush()
1221 {
1222 char dummyif[IFNAMSIZ+8];
1223 int sock;
1224
1225 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1226 err(1, "socket");
1227 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1228 if (ioctl(sock, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1229 err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1230
1231 close(sock);
1232 }
1233
1234 static void
rtr_flush()1235 rtr_flush()
1236 {
1237 char dummyif[IFNAMSIZ+8];
1238 int sock;
1239
1240 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1241 err(1, "socket");
1242 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1243 if (ioctl(sock, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1244 err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1245
1246 close(sock);
1247 }
1248
1249 static void
harmonize_rtr()1250 harmonize_rtr()
1251 {
1252 char dummyif[IFNAMSIZ+8];
1253 int sock;
1254
1255 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1256 err(1, "socket");
1257 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1258 if (ioctl(sock, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1259 err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1260
1261 close(sock);
1262 }
1263
1264 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1265 static void
setdefif(char * ifname)1266 setdefif(char *ifname)
1267 {
1268 struct in6_ndifreq ndifreq;
1269 unsigned int ifindex;
1270 int sock;
1271
1272 if (strcasecmp(ifname, "delete") == 0)
1273 ifindex = 0;
1274 else {
1275 if ((ifindex = if_nametoindex(ifname)) == 0)
1276 err(1, "failed to resolve i/f index for %s", ifname);
1277 }
1278
1279 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1280 err(1, "socket");
1281
1282 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1283 ndifreq.ifindex = ifindex;
1284
1285 if (ioctl(sock, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1286 err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1287
1288 close(sock);
1289 }
1290
1291 static void
getdefif()1292 getdefif()
1293 {
1294 struct in6_ndifreq ndifreq;
1295 char ifname[IFNAMSIZ+8];
1296 int sock;
1297
1298 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1299 err(1, "socket");
1300
1301 memset(&ndifreq, 0, sizeof(ndifreq));
1302 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1303
1304 if (ioctl(sock, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1305 err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1306
1307 if (ndifreq.ifindex == 0)
1308 printf("No default interface.\n");
1309 else {
1310 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1311 err(1, "failed to resolve ifname for index %lu",
1312 ndifreq.ifindex);
1313 printf("ND default interface = %s\n", ifname);
1314 }
1315
1316 close(sock);
1317 }
1318 #endif /* SIOCSDEFIFACE_IN6 */
1319
1320 static char *
sec2str(time_t total)1321 sec2str(time_t total)
1322 {
1323 static char result[256];
1324 int days, hours, mins, secs;
1325 int first = 1;
1326 char *p = result;
1327 char *ep = &result[sizeof(result)];
1328 int n;
1329
1330 days = total / 3600 / 24;
1331 hours = (total / 3600) % 24;
1332 mins = (total / 60) % 60;
1333 secs = total % 60;
1334
1335 if (days) {
1336 first = 0;
1337 n = snprintf(p, ep - p, "%dd", days);
1338 if (n < 0 || n >= ep - p)
1339 return "?";
1340 p += n;
1341 }
1342 if (!first || hours) {
1343 first = 0;
1344 n = snprintf(p, ep - p, "%dh", hours);
1345 if (n < 0 || n >= ep - p)
1346 return "?";
1347 p += n;
1348 }
1349 if (!first || mins) {
1350 first = 0;
1351 n = snprintf(p, ep - p, "%dm", mins);
1352 if (n < 0 || n >= ep - p)
1353 return "?";
1354 p += n;
1355 }
1356 snprintf(p, ep - p, "%ds", secs);
1357
1358 return(result);
1359 }
1360
1361 /*
1362 * Print the timestamp
1363 * from tcpdump/util.c
1364 */
1365 static void
ts_print(const struct timeval * tvp)1366 ts_print(const struct timeval *tvp)
1367 {
1368 int sec;
1369
1370 /* Default */
1371 sec = (tvp->tv_sec + thiszone) % 86400;
1372 (void)printf("%02d:%02d:%02d.%06u ",
1373 sec / 3600, (sec % 3600) / 60, sec % 60, (u_int32_t)tvp->tv_usec);
1374 }
1375
1376 #undef NEXTADDR
1377