1 /* $KAME: ndp.c,v 1.104 2003/06/27 07:48:39 itojun Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-3-Clause
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. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
63 */
64
65 /*
66 * Based on:
67 * The Regents of the University of California. All rights reserved.\n";
68 */
69
70 /*
71 * ndp - display, set, delete and flush neighbor cache
72 */
73
74
75 #include <sys/param.h>
76 #include <sys/file.h>
77 #include <sys/ioctl.h>
78 #include <sys/socket.h>
79 #include <sys/sysctl.h>
80 #include <sys/time.h>
81 #include <sys/queue.h>
82
83 #include <net/if.h>
84 #include <net/if_dl.h>
85 #include <net/if_types.h>
86 #include <net/route.h>
87
88 #include <netinet/in.h>
89 #include <netinet/if_ether.h>
90
91 #include <netinet/icmp6.h>
92 #include <netinet6/in6_var.h>
93 #include <netinet6/nd6.h>
94
95 #include <arpa/inet.h>
96
97 #include <assert.h>
98 #include <ctype.h>
99 #include <netdb.h>
100 #include <errno.h>
101 #include <nlist.h>
102 #include <stdbool.h>
103 #include <stdio.h>
104 #include <string.h>
105 #include <paths.h>
106 #include <err.h>
107 #include <stdint.h>
108 #include <stdlib.h>
109 #include <fcntl.h>
110 #include <unistd.h>
111 #include <libxo/xo.h>
112 #include <time.h>
113
114 #include "ndp.h"
115
116 #define NEXTADDR(w, s) \
117 if (rtm->rtm_addrs & (w)) { \
118 bcopy((char *)&s, cp, sizeof(s)); \
119 cp += SA_SIZE(&s); \
120 }
121
122 static pid_t pid;
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 int set(int, char **);
132 static void get(char *);
133 static int delete(char *);
134 static int dump(struct sockaddr_in6 *, int);
135 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
136 static int ndp_ether_aton(char *, u_char *);
137 static void usage(void) __dead2;
138 static void ifinfo(char *, int, char **);
139 static void rtrlist(void);
140 static void plist(void);
141 static void pfx_flush(void);
142 static void rtr_flush(void);
143 static void harmonize_rtr(void);
144 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */
145 static void getdefif(void);
146 static void setdefif(char *);
147 #endif
148
149 #ifdef WITHOUT_NETLINK
150 static void getsocket(void);
151 static int rtmsg(int);
152 #endif
153
154 static const char *rtpref_str[] = {
155 "medium", /* 00 */
156 "high", /* 01 */
157 "rsv", /* 10 */
158 "low" /* 11 */
159 };
160
161 struct ndp_opts opts = {};
162
163 #define NDP_XO_VERSION "1"
164
165 bool
valid_type(int if_type)166 valid_type(int if_type)
167 {
168 switch (if_type) {
169 case IFT_ETHER:
170 case IFT_FDDI:
171 case IFT_ISO88023:
172 case IFT_ISO88024:
173 case IFT_ISO88025:
174 case IFT_L2VLAN:
175 case IFT_BRIDGE:
176 return (true);
177 break;
178 }
179 return (false);
180 }
181
182 static int32_t
utc_offset(void)183 utc_offset(void)
184 {
185 time_t t;
186 struct tm *tm;
187
188 t = time(NULL);
189 tm = localtime(&t);
190
191 assert(tm->tm_gmtoff > INT32_MIN && tm->tm_gmtoff < INT32_MAX);
192
193 return (tm->tm_gmtoff);
194 }
195
196 int
main(int argc,char ** argv)197 main(int argc, char **argv)
198 {
199 int ch, mode = 0;
200 char *arg = NULL;
201 int ret = 0;
202
203 pid = getpid();
204 thiszone = utc_offset();
205
206 argc = xo_parse_args(argc, argv);
207 if (argc < 0)
208 exit(1);
209 xo_set_version(NDP_XO_VERSION);
210 xo_open_container("ndp");
211
212 while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
213 switch (ch) {
214 case 'a':
215 case 'c':
216 case 'p':
217 case 'r':
218 case 'H':
219 case 'P':
220 case 'R':
221 case 's':
222 case 'I':
223 if (mode) {
224 usage();
225 /*NOTREACHED*/
226 }
227 mode = ch;
228 arg = NULL;
229 break;
230 case 'f':
231 exit(file(optarg) ? 1 : 0);
232 case 'd':
233 case 'i':
234 if (mode) {
235 usage();
236 /*NOTREACHED*/
237 }
238 mode = ch;
239 arg = optarg;
240 break;
241 case 'n':
242 opts.nflag = true;
243 break;
244 case 't':
245 opts.tflag = true;
246 break;
247 case 'A':
248 if (mode) {
249 usage();
250 /*NOTREACHED*/
251 }
252 mode = 'a';
253 repeat = atoi(optarg);
254 if (repeat < 0) {
255 usage();
256 /*NOTREACHED*/
257 }
258 break;
259 default:
260 usage();
261 }
262
263 argc -= optind;
264 argv += optind;
265
266 switch (mode) {
267 case 'a':
268 case 'c':
269 if (argc != 0) {
270 usage();
271 /*NOTREACHED*/
272 }
273 dump(0, mode == 'c');
274 break;
275 case 'd':
276 if (argc != 0) {
277 usage();
278 /*NOTREACHED*/
279 }
280 xo_open_list("neighbor-cache");
281 ret = delete(arg);
282 xo_close_list("neighbor-cache");
283 break;
284 case 'I':
285 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */
286 if (argc > 1) {
287 usage();
288 /*NOTREACHED*/
289 } else if (argc == 1) {
290 if (strcmp(*argv, "delete") == 0 ||
291 if_nametoindex(*argv))
292 setdefif(*argv);
293 else
294 xo_errx(1, "invalid interface %s", *argv);
295 }
296 getdefif(); /* always call it to print the result */
297 break;
298 #else
299 xo_errx(1, "not supported yet");
300 /*NOTREACHED*/
301 #endif
302 case 'p':
303 if (argc != 0) {
304 usage();
305 /*NOTREACHED*/
306 }
307 plist();
308 break;
309 case 'i':
310 ifinfo(arg, argc, argv);
311 break;
312 case 'r':
313 if (argc != 0) {
314 usage();
315 /*NOTREACHED*/
316 }
317 rtrlist();
318 break;
319 case 's':
320 if (argc < 2 || argc > 4)
321 usage();
322 exit(set(argc, argv) ? 1 : 0);
323 case 'H':
324 if (argc != 0) {
325 usage();
326 /*NOTREACHED*/
327 }
328 harmonize_rtr();
329 break;
330 case 'P':
331 if (argc != 0) {
332 usage();
333 /*NOTREACHED*/
334 }
335 pfx_flush();
336 break;
337 case 'R':
338 if (argc != 0) {
339 usage();
340 /*NOTREACHED*/
341 }
342 rtr_flush();
343 break;
344 case 0:
345 if (argc != 1) {
346 usage();
347 /*NOTREACHED*/
348 }
349 get(argv[0]);
350 break;
351 }
352 xo_close_container("ndp");
353 xo_finish();
354
355 return (ret);
356 }
357
358 /*
359 * Process a file to set standard ndp entries
360 */
361 static int
file(char * name)362 file(char *name)
363 {
364 FILE *fp;
365 int i, retval;
366 char line[100], arg[5][50], *args[5], *p;
367
368 if ((fp = fopen(name, "r")) == NULL)
369 xo_err(1, "cannot open %s", name);
370 args[0] = &arg[0][0];
371 args[1] = &arg[1][0];
372 args[2] = &arg[2][0];
373 args[3] = &arg[3][0];
374 args[4] = &arg[4][0];
375 retval = 0;
376 while (fgets(line, sizeof(line), fp) != NULL) {
377 if ((p = strchr(line, '#')) != NULL)
378 *p = '\0';
379 for (p = line; isblank(*p); p++);
380 if (*p == '\n' || *p == '\0')
381 continue;
382 i = sscanf(line, "%49s %49s %49s %49s %49s",
383 arg[0], arg[1], arg[2], arg[3], arg[4]);
384 if (i < 2) {
385 xo_warnx("bad line: %s", line);
386 retval = 1;
387 continue;
388 }
389 if (set(i, args))
390 retval = 1;
391 }
392 fclose(fp);
393 return (retval);
394 }
395
396 static void
getsocket(void)397 getsocket(void)
398 {
399 if (s < 0) {
400 s = socket(PF_ROUTE, SOCK_RAW, 0);
401 if (s < 0) {
402 xo_err(1, "socket");
403 /* NOTREACHED */
404 }
405 }
406 }
407
408 static struct sockaddr_in6 so_mask = {
409 .sin6_len = sizeof(so_mask),
410 .sin6_family = AF_INET6
411 };
412 static struct sockaddr_in6 blank_sin = {
413 .sin6_len = sizeof(blank_sin),
414 .sin6_family = AF_INET6
415 };
416 static struct sockaddr_in6 sin_m;
417 static struct sockaddr_dl blank_sdl = {
418 .sdl_len = sizeof(blank_sdl),
419 .sdl_family = AF_LINK
420 };
421 static struct sockaddr_dl sdl_m;
422 #ifdef WITHOUT_NETLINK
423 static struct {
424 struct rt_msghdr m_rtm;
425 char m_space[512];
426 } m_rtmsg;
427 #endif
428
429 /*
430 * Set an individual neighbor cache entry
431 */
432 static int
set(int argc,char ** argv)433 set(int argc, char **argv)
434 {
435 struct sockaddr_in6 *sin = &sin_m;
436 int gai_error;
437 u_char *ea;
438 char *host = argv[0], *eaddr = argv[1];
439
440 argc -= 2;
441 argv += 2;
442 sdl_m = blank_sdl;
443 sin_m = blank_sin;
444
445 gai_error = getaddr(host, sin);
446 if (gai_error) {
447 xo_warnx("%s: %s", host, gai_strerror(gai_error));
448 return 1;
449 }
450
451 ea = (u_char *)LLADDR(&sdl_m);
452 if (ndp_ether_aton(eaddr, ea) == 0)
453 sdl_m.sdl_alen = 6;
454 while (argc-- > 0) {
455 if (strncmp(argv[0], "temp", 4) == 0) {
456 struct timeval now;
457
458 gettimeofday(&now, 0);
459 opts.expire_time = now.tv_sec + 20 * 60;
460 } else if (strncmp(argv[0], "proxy", 5) == 0)
461 opts.flags |= RTF_ANNOUNCE;
462 argv++;
463 }
464
465 #ifndef WITHOUT_NETLINK
466 return (set_nl(0, sin, &sdl_m, host));
467 #else
468 struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
469 struct sockaddr_dl *sdl;
470
471 getsocket();
472
473 if (rtmsg(RTM_GET) < 0) {
474 xo_errx(1, "RTM_GET(%s) failed", host);
475 /* NOTREACHED */
476 }
477 sin = (struct sockaddr_in6 *)(rtm + 1);
478 sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
479 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
480 if (sdl->sdl_family == AF_LINK &&
481 !(rtm->rtm_flags & RTF_GATEWAY)) {
482 if (valid_type(sdl->sdl_type))
483 goto overwrite;
484 }
485 xo_warnx("cannot configure a new entry");
486 return 1;
487 }
488
489 overwrite:
490 if (sdl->sdl_family != AF_LINK) {
491 xo_warnx("cannot intuit interface index and type for %s", host);
492 return (1);
493 }
494 sdl_m.sdl_type = sdl->sdl_type;
495 sdl_m.sdl_index = sdl->sdl_index;
496 return (rtmsg(RTM_ADD));
497 #endif
498 }
499
500 int
getaddr(char * host,struct sockaddr_in6 * sin6)501 getaddr(char *host, struct sockaddr_in6 *sin6)
502 {
503 struct addrinfo hints = { .ai_family = AF_INET6 };
504 struct addrinfo *res;
505
506 int gai_error = getaddrinfo(host, NULL, &hints, &res);
507 if (gai_error != 0)
508 return (gai_error);
509 sin6->sin6_family = AF_INET6;
510 sin6->sin6_len = sizeof(*sin6);
511 sin6->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
512 sin6->sin6_scope_id =
513 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
514 return (0);
515 }
516
517 /*
518 * Display an individual neighbor cache entry
519 */
520 static void
get(char * host)521 get(char *host)
522 {
523 struct sockaddr_in6 *sin = &sin_m;
524 int gai_error;
525
526 sin_m = blank_sin;
527
528 gai_error = getaddr(host, sin);
529 if (gai_error) {
530 xo_warnx("%s: %s", host, gai_strerror(gai_error));
531 return;
532 }
533 if (dump(sin, 0) == 0) {
534 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
535 sizeof(host_buf), NULL ,0,
536 (opts.nflag ? NI_NUMERICHOST : 0));
537 xo_errx(1, "%s (%s) -- no entry", host, host_buf);
538 }
539 }
540
541 #ifdef WITHOUT_NETLINK
542 /*
543 * Delete a neighbor cache entry
544 */
545 static int
delete_rtsock(char * host)546 delete_rtsock(char *host)
547 {
548 struct sockaddr_in6 *sin = &sin_m;
549 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
550 register char *cp = m_rtmsg.m_space;
551 struct sockaddr_dl *sdl;
552 int gai_error;
553
554 getsocket();
555 sin_m = blank_sin;
556
557 gai_error = getaddr(host, sin);
558 if (gai_error) {
559 xo_warnx("%s: %s", host, gai_strerror(gai_error));
560 return 1;
561 }
562
563 if (rtmsg(RTM_GET) < 0) {
564 xo_errx(1, "RTM_GET(%s) failed", host);
565 /* NOTREACHED */
566 }
567 sin = (struct sockaddr_in6 *)(rtm + 1);
568 sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
569 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
570 if (sdl->sdl_family == AF_LINK &&
571 !(rtm->rtm_flags & RTF_GATEWAY)) {
572 goto delete;
573 }
574 xo_warnx("delete: cannot delete non-NDP entry");
575 return 1;
576 }
577
578 delete:
579 if (sdl->sdl_family != AF_LINK) {
580 xo_warnx("cannot locate %s", host);
581 return (1);
582 }
583 /*
584 * need to reinit the field because it has rt_key
585 * but we want the actual address
586 */
587 NEXTADDR(RTA_DST, sin_m);
588 rtm->rtm_flags |= RTF_LLDATA;
589 if (rtmsg(RTM_DELETE) == 0) {
590 getnameinfo((struct sockaddr *)sin,
591 sin->sin6_len, host_buf,
592 sizeof(host_buf), NULL, 0,
593 (opts.nflag ? NI_NUMERICHOST : 0));
594 xo_open_instance("neighbor-cache");
595
596 char *ifname = if_indextoname(sdl->sdl_index, ifix_buf);
597 if (ifname == NULL) {
598 strlcpy(ifix_buf, "?", sizeof(ifix_buf));
599 ifname = ifix_buf;
600 }
601 char abuf[INET6_ADDRSTRLEN];
602 inet_ntop(AF_INET6, &sin->sin6_addr, abuf, sizeof(abuf));
603
604 xo_emit("{:hostname/%s}{d:/ (%s) deleted\n}", host, host_buf);
605 xo_emit("{e:address/%s}{e:interface/%s}", abuf, ifname);
606 xo_close_instance("neighbor-cache");
607 }
608
609 return 0;
610 }
611
612 /*
613 * Dump the entire neighbor cache
614 */
615 static int
dump_rtsock(struct sockaddr_in6 * addr,int cflag)616 dump_rtsock(struct sockaddr_in6 *addr, int cflag)
617 {
618 int mib[6];
619 size_t needed;
620 char *lim, *buf, *next;
621 struct rt_msghdr *rtm;
622 struct sockaddr_in6 *sin;
623 struct sockaddr_dl *sdl;
624 struct timeval now;
625 time_t expire;
626 int addrwidth;
627 int llwidth;
628 int ifwidth;
629 char flgbuf[8];
630 char *ifname;
631
632 /* Print header */
633 if (!opts.tflag && !cflag) {
634 char xobuf[200];
635 snprintf(xobuf, sizeof(xobuf),
636 "{T:/%%-%d.%ds} {T:/%%-%d.%ds} {T:/%%%d.%ds} {T:/%%-9.9s} {T:%%1s} {T:%%5s}\n",
637 W_ADDR, W_ADDR, W_LL, W_LL, W_IF, W_IF);
638 xo_emit(xobuf, "Neighbor", "Linklayer Address", "Netif", "Expire", "S", "Flags");
639 }
640 xo_open_list("neighbor-cache");
641 again:;
642 mib[0] = CTL_NET;
643 mib[1] = PF_ROUTE;
644 mib[2] = 0;
645 mib[3] = AF_INET6;
646 mib[4] = NET_RT_FLAGS;
647 #ifdef RTF_LLINFO
648 mib[5] = RTF_LLINFO;
649 #else
650 mib[5] = 0;
651 #endif
652 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
653 xo_err(1, "sysctl(PF_ROUTE estimate)");
654 if (needed > 0) {
655 /*
656 * Add ~2% additional space in case some records
657 * will appear between sysctl() calls.
658 * Round it up so it can fit 4 additional messages at least.
659 */
660 needed += ((needed >> 6) | (sizeof(m_rtmsg) * 4));
661 if ((buf = malloc(needed)) == NULL)
662 xo_err(1, "malloc");
663 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
664 xo_err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
665 lim = buf + needed;
666 } else
667 buf = lim = NULL;
668
669 int count = 0;
670 for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
671 int isrouter = 0, prbs = 0;
672
673 rtm = (struct rt_msghdr *)next;
674 sin = (struct sockaddr_in6 *)(rtm + 1);
675 sdl = (struct sockaddr_dl *)((char *)sin +
676 ALIGN(sin->sin6_len));
677
678 /*
679 * Some OSes can produce a route that has the LINK flag but
680 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
681 * and BSD/OS, where xx is not the interface identifier on
682 * lo0). Such routes entry would annoy getnbrinfo() below,
683 * so we skip them.
684 * XXX: such routes should have the GATEWAY flag, not the
685 * LINK flag. However, there is rotten routing software
686 * that advertises all routes that have the GATEWAY flag.
687 * Thus, KAME kernel intentionally does not set the LINK flag.
688 * What is to be fixed is not ndp, but such routing software
689 * (and the kernel workaround)...
690 */
691 if (sdl->sdl_family != AF_LINK)
692 continue;
693
694 if (!(rtm->rtm_flags & RTF_HOST))
695 continue;
696
697 if (addr) {
698 if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr,
699 &sin->sin6_addr) == 0 ||
700 addr->sin6_scope_id != sin->sin6_scope_id)
701 continue;
702 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
703 continue;
704 count++;
705 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
706 IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
707 /* XXX: should scope id be filled in the kernel? */
708 if (sin->sin6_scope_id == 0)
709 sin->sin6_scope_id = sdl->sdl_index;
710 }
711 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
712 sizeof(host_buf), NULL, 0, (opts.nflag ? NI_NUMERICHOST : 0));
713 if (cflag) {
714 #ifdef RTF_WASCLONED
715 if (rtm->rtm_flags & RTF_WASCLONED)
716 delete(host_buf);
717 #elif defined(RTF_CLONED)
718 if (rtm->rtm_flags & RTF_CLONED)
719 delete(host_buf);
720 #else
721 if (rtm->rtm_flags & RTF_PINNED)
722 continue;
723 delete(host_buf);
724 #endif
725 continue;
726 }
727 gettimeofday(&now, 0);
728 if (opts.tflag)
729 ts_print(&now);
730
731 addrwidth = strlen(host_buf);
732 if (addrwidth < W_ADDR)
733 addrwidth = W_ADDR;
734 llwidth = strlen(ether_str(sdl));
735 if (W_ADDR + W_LL - addrwidth > llwidth)
736 llwidth = W_ADDR + W_LL - addrwidth;
737 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
738 if (ifname == NULL) {
739 strlcpy(ifix_buf, "?", sizeof(ifix_buf));
740 ifname = ifix_buf;
741 }
742 ifwidth = strlen(ifname);
743 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
744 ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
745
746 xo_open_instance("neighbor-cache");
747 /* Compose format string for libxo, as it doesn't support *.* */
748 char xobuf[200];
749 snprintf(xobuf, sizeof(xobuf),
750 "{:address/%%-%d.%ds/%%s} {:mac-address/%%-%d.%ds/%%s} {:interface/%%%d.%ds/%%s}",
751 addrwidth, addrwidth, llwidth, llwidth, ifwidth, ifwidth);
752 xo_emit(xobuf, host_buf, ether_str(sdl), ifname);
753
754 /* Print neighbor discovery specific information */
755 expire = rtm->rtm_rmx.rmx_expire;
756 int expire_in = expire - now.tv_sec;
757 if (expire > now.tv_sec)
758 xo_emit("{d:/ %-9.9s}{e:expires_sec/%d}", sec2str(expire_in), expire_in);
759 else if (expire == 0)
760 xo_emit("{d:/ %-9.9s}{en:permanent/true}", "permanent");
761 else
762 xo_emit("{d:/ %-9.9s}{e:expires_sec/%d}", "expired", expire_in);
763
764 char *lle_state = "";
765 switch (rtm->rtm_rmx.rmx_state) {
766 case ND6_LLINFO_NOSTATE:
767 lle_state = "N";
768 break;
769 #ifdef ND6_LLINFO_WAITDELETE
770 case ND6_LLINFO_WAITDELETE:
771 lle_state = "W";
772 break;
773 #endif
774 case ND6_LLINFO_INCOMPLETE:
775 lle_state = "I";
776 break;
777 case ND6_LLINFO_REACHABLE:
778 lle_state = "R";
779 break;
780 case ND6_LLINFO_STALE:
781 lle_state = "S";
782 break;
783 case ND6_LLINFO_DELAY:
784 lle_state = "D";
785 break;
786 case ND6_LLINFO_PROBE:
787 lle_state = "P";
788 break;
789 default:
790 lle_state = "?";
791 break;
792 }
793 xo_emit(" {:neighbor-state/%s}", lle_state);
794
795 isrouter = rtm->rtm_flags & RTF_GATEWAY;
796 prbs = rtm->rtm_rmx.rmx_pksent;
797
798 /*
799 * other flags. R: router, P: proxy, W: ??
800 */
801 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
802 snprintf(flgbuf, sizeof(flgbuf), "%s%s",
803 isrouter ? "R" : "",
804 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
805 } else {
806 #if 0 /* W and P are mystery even for us */
807 sin = (struct sockaddr_in6 *)
808 (sdl->sdl_len + (char *)sdl);
809 snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
810 isrouter ? "R" : "",
811 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
812 (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
813 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
814 #else
815 snprintf(flgbuf, sizeof(flgbuf), "%s%s",
816 isrouter ? "R" : "",
817 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
818 #endif
819 }
820 xo_emit(" {:nd-flags/%s}", flgbuf);
821
822 if (prbs)
823 xo_emit("{d:/ %d}", prbs);
824
825 xo_emit("\n");
826 xo_close_instance("neighbor-cache");
827 }
828 if (buf != NULL)
829 free(buf);
830
831 if (repeat) {
832 xo_emit("\n");
833 xo_flush();
834 sleep(repeat);
835 goto again;
836 }
837
838 xo_close_list("neighbor-cache");
839
840 return (count);
841 }
842 #endif
843
844
845 static int
delete(char * host)846 delete(char *host)
847 {
848 #ifndef WITHOUT_NETLINK
849 return (delete_nl(0, host, true)); /* do warn */
850 #else
851 return (delete_rtsock(host));
852 #endif
853 }
854
855 static int
dump(struct sockaddr_in6 * addr,int cflag)856 dump(struct sockaddr_in6 *addr, int cflag)
857 {
858 #ifndef WITHOUT_NETLINK
859 return (print_entries_nl(0, addr, cflag));
860 #else
861 return (dump_rtsock(addr, cflag));
862 #endif
863 }
864
865 static struct in6_nbrinfo *
getnbrinfo(struct in6_addr * addr,int ifindex,int warning)866 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
867 {
868 static struct in6_nbrinfo nbi;
869 int sock;
870
871 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
872 xo_err(1, "socket");
873
874 bzero(&nbi, sizeof(nbi));
875 if_indextoname(ifindex, nbi.ifname);
876 nbi.addr = *addr;
877 if (ioctl(sock, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
878 if (warning)
879 xo_warn("ioctl(SIOCGNBRINFO_IN6)");
880 close(sock);
881 return(NULL);
882 }
883
884 close(sock);
885 return(&nbi);
886 }
887
888 char *
ether_str(struct sockaddr_dl * sdl)889 ether_str(struct sockaddr_dl *sdl)
890 {
891 static char hbuf[NI_MAXHOST];
892
893 if (sdl->sdl_alen == ETHER_ADDR_LEN) {
894 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
895 sizeof(hbuf));
896 } else if (sdl->sdl_alen) {
897 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
898 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
899 } else
900 snprintf(hbuf, sizeof(hbuf), "(incomplete)");
901
902 return(hbuf);
903 }
904
905 static int
ndp_ether_aton(char * a,u_char * n)906 ndp_ether_aton(char *a, u_char *n)
907 {
908 int i, o[6];
909
910 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
911 &o[3], &o[4], &o[5]);
912 if (i != 6) {
913 xo_warnx("invalid Ethernet address '%s'", a);
914 return (1);
915 }
916 for (i = 0; i < 6; i++)
917 n[i] = o[i];
918 return (0);
919 }
920
921 static void
usage(void)922 usage(void)
923 {
924 printf("usage: ndp [-nt] hostname\n");
925 printf(" ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
926 printf(" ndp [-nt] -A wait\n");
927 printf(" ndp [-nt] -d hostname\n");
928 printf(" ndp [-nt] -f filename\n");
929 printf(" ndp [-nt] -i interface [flags...]\n");
930 #ifdef SIOCSDEFIFACE_IN6
931 printf(" ndp [-nt] -I [interface|delete]\n");
932 #endif
933 printf(" ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
934 exit(1);
935 }
936
937 #ifdef WITHOUT_NETLINK
938 static int
rtmsg(int cmd)939 rtmsg(int cmd)
940 {
941 static int seq;
942 int rlen;
943 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
944 register char *cp = m_rtmsg.m_space;
945 register int l;
946
947 errno = 0;
948 if (cmd == RTM_DELETE)
949 goto doit;
950 bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
951 rtm->rtm_flags = opts.flags;
952 rtm->rtm_version = RTM_VERSION;
953
954 switch (cmd) {
955 default:
956 xo_errx(1, "internal wrong cmd");
957 case RTM_ADD:
958 rtm->rtm_addrs |= RTA_GATEWAY;
959 if (opts.expire_time) {
960 rtm->rtm_rmx.rmx_expire = opts.expire_time;
961 rtm->rtm_inits = RTV_EXPIRE;
962 }
963 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
964 /* FALLTHROUGH */
965 case RTM_GET:
966 rtm->rtm_addrs |= RTA_DST;
967 }
968
969 NEXTADDR(RTA_DST, sin_m);
970 NEXTADDR(RTA_GATEWAY, sdl_m);
971
972 rtm->rtm_msglen = cp - (char *)&m_rtmsg;
973 doit:
974 l = rtm->rtm_msglen;
975 rtm->rtm_seq = ++seq;
976 rtm->rtm_type = cmd;
977 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
978 if (errno != ESRCH || cmd != RTM_DELETE) {
979 xo_err(1, "writing to routing socket");
980 /* NOTREACHED */
981 }
982 }
983 do {
984 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
985 } while (l > 0 && (rtm->rtm_type != cmd || rtm->rtm_seq != seq ||
986 rtm->rtm_pid != pid));
987 if (l < 0)
988 xo_warn("read from routing socket");
989 return (0);
990 }
991 #endif
992
993 static void
ifinfo(char * ifname,int argc,char ** argv)994 ifinfo(char *ifname, int argc, char **argv)
995 {
996 struct in6_ndireq nd;
997 int i, sock;
998 u_int32_t newflags;
999 #ifdef IPV6CTL_USETEMPADDR
1000 u_int8_t nullbuf[8];
1001 #endif
1002
1003 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1004 xo_err(1, "socket");
1005 /* NOTREACHED */
1006 }
1007 bzero(&nd, sizeof(nd));
1008 strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
1009 if (ioctl(sock, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1010 xo_err(1, "ioctl(SIOCGIFINFO_IN6)");
1011 /* NOTREACHED */
1012 }
1013 #define ND nd.ndi
1014 newflags = ND.flags;
1015 for (i = 0; i < argc; i++) {
1016 int clear = 0;
1017 char *cp = argv[i];
1018
1019 if (*cp == '-') {
1020 clear = 1;
1021 cp++;
1022 }
1023
1024 #define SETFLAG(s, f) do { \
1025 if (strcmp(cp, (s)) == 0) { \
1026 if (clear) \
1027 newflags &= ~(f); \
1028 else \
1029 newflags |= (f); \
1030 } \
1031 } while (0)
1032 /*
1033 * XXX: this macro is not 100% correct, in that it matches "nud" against
1034 * "nudbogus". But we just let it go since this is minor.
1035 */
1036 #define SETVALUE(f, v) do { \
1037 char *valptr; \
1038 unsigned long newval; \
1039 v = 0; /* unspecified */ \
1040 if (strncmp(cp, f, strlen(f)) == 0) { \
1041 valptr = strchr(cp, '='); \
1042 if (valptr == NULL) \
1043 xo_err(1, "syntax error in %s field", (f)); \
1044 errno = 0; \
1045 newval = strtoul(++valptr, NULL, 0); \
1046 if (errno) \
1047 xo_err(1, "syntax error in %s's value", (f)); \
1048 v = newval; \
1049 } \
1050 } while (0)
1051
1052 SETFLAG("disabled", ND6_IFF_IFDISABLED);
1053 SETFLAG("nud", ND6_IFF_PERFORMNUD);
1054 #ifdef ND6_IFF_ACCEPT_RTADV
1055 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
1056 #endif
1057 #ifdef ND6_IFF_AUTO_LINKLOCAL
1058 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
1059 #endif
1060 #ifdef ND6_IFF_NO_PREFER_IFACE
1061 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
1062 #endif
1063 SETVALUE("basereachable", ND.basereachable);
1064 SETVALUE("retrans", ND.retrans);
1065 SETVALUE("curhlim", ND.chlim);
1066
1067 ND.flags = newflags;
1068 if (ioctl(sock, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
1069 xo_err(1, "ioctl(SIOCSIFINFO_IN6)");
1070 /* NOTREACHED */
1071 }
1072 #undef SETFLAG
1073 #undef SETVALUE
1074 }
1075
1076 if (!ND.initialized) {
1077 xo_errx(1, "%s: not initialized yet", ifname);
1078 /* NOTREACHED */
1079 }
1080
1081 if (ioctl(sock, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1082 xo_err(1, "ioctl(SIOCGIFINFO_IN6)");
1083 /* NOTREACHED */
1084 }
1085 xo_open_container("ifinfo");
1086
1087 xo_emit("{e:interface/%s}", ifname);
1088 xo_emit("linkmtu={:linkmtu/%d}", ND.linkmtu);
1089 xo_emit(", maxmtu={:maxmtu/%d}", ND.maxmtu);
1090 xo_emit(", curhlim={:curhlim/%d}", ND.chlim);
1091 xo_emit("{d:/, basereachable=%ds%dms}{e:basereachable_ms/%u}",
1092 ND.basereachable / 1000, ND.basereachable % 1000, ND.basereachable);
1093 xo_emit("{d:/, reachable=%ds}{e:reachable_ms/%u}", ND.reachable, ND.reachable * 1000);
1094 xo_emit("{d:/, retrans=%ds%dms}{e:retrans_ms/%u}", ND.retrans / 1000, ND.retrans % 1000,
1095 ND.retrans);
1096 #ifdef IPV6CTL_USETEMPADDR
1097 memset(nullbuf, 0, sizeof(nullbuf));
1098 if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1099 int j;
1100 u_int8_t *rbuf;
1101
1102 for (i = 0; i < 3; i++) {
1103 const char *txt, *field;
1104 switch (i) {
1105 case 0:
1106 txt = "\nRandom seed(0): ";
1107 field = "seed_0";
1108 rbuf = ND.randomseed0;
1109 break;
1110 case 1:
1111 txt = "\nRandom seed(1): ";
1112 field = "seed_1";
1113 rbuf = ND.randomseed1;
1114 break;
1115 case 2:
1116 txt = "\nRandom ID: ";
1117 field = "random_id";
1118 rbuf = ND.randomid;
1119 break;
1120 default:
1121 xo_errx(1, "impossible case for tempaddr display");
1122 }
1123 char abuf[20], xobuf[200];
1124 for (j = 0; j < 8; j++)
1125 snprintf(&abuf[j * 2], sizeof(abuf), "%02X", rbuf[j]);
1126 snprintf(xobuf, sizeof(xobuf), "%s{:%s/%%s}", txt, field);
1127 xo_emit(xobuf, abuf);
1128 }
1129 }
1130 #endif /* IPV6CTL_USETEMPADDR */
1131 if (ND.flags) {
1132 xo_emit("\nFlags: {e:flags/%u}", ND.flags);
1133 xo_open_list("flags_pretty");
1134 #ifdef ND6_IFF_IFDISABLED
1135 if ((ND.flags & ND6_IFF_IFDISABLED))
1136 xo_emit("{l:%s} ", "disabled");
1137 #endif
1138 if ((ND.flags & ND6_IFF_PERFORMNUD))
1139 xo_emit("{l:%s} ", "nud");
1140 #ifdef ND6_IFF_ACCEPT_RTADV
1141 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1142 xo_emit("{l:%s} ", "accept_rtadv");
1143 #endif
1144 #ifdef ND6_IFF_AUTO_LINKLOCAL
1145 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1146 xo_emit("{l:%s} ", "auto_linklocal");
1147 #endif
1148 #ifdef ND6_IFF_NO_PREFER_IFACE
1149 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1150 xo_emit("{l:%s} ", "no_prefer_iface");
1151 #endif
1152 xo_close_list("flags");
1153 }
1154 xo_emit("\n");
1155 #undef ND
1156 xo_close_container("ifinfo");
1157
1158 close(sock);
1159 }
1160
1161 #ifndef ND_RA_FLAG_RTPREF_MASK /* XXX: just for compilation on *BSD release */
1162 #define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
1163 #endif
1164
1165 static void
rtrlist(void)1166 rtrlist(void)
1167 {
1168 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1169 char *buf;
1170 struct in6_defrouter *p, *ep;
1171 size_t l;
1172 struct timeval now;
1173
1174 if (sysctl(mib, nitems(mib), NULL, &l, NULL, 0) < 0) {
1175 xo_err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1176 /*NOTREACHED*/
1177 }
1178 if (l == 0)
1179 return;
1180 buf = malloc(l);
1181 if (!buf) {
1182 xo_err(1, "malloc");
1183 /*NOTREACHED*/
1184 }
1185 if (sysctl(mib, nitems(mib), buf, &l, NULL, 0) < 0) {
1186 xo_err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1187 /*NOTREACHED*/
1188 }
1189
1190 xo_open_list("router-list");
1191
1192 ep = (struct in6_defrouter *)(buf + l);
1193 for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1194 int rtpref;
1195 char abuf[INET6_ADDRSTRLEN], *paddr;
1196
1197 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1198 p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1199 (opts.nflag ? NI_NUMERICHOST : 0)) != 0)
1200 strlcpy(host_buf, "?", sizeof(host_buf));
1201 if (opts.nflag)
1202 paddr = host_buf;
1203 else {
1204 inet_ntop(AF_INET6, &p->rtaddr.sin6_addr, abuf, sizeof(abuf));
1205 paddr = abuf;
1206 }
1207
1208 xo_open_instance("router-list");
1209 xo_emit("{:hostname/%s}{e:address/%s} if={:interface/%s}",
1210 host_buf, paddr,
1211 if_indextoname(p->if_index, ifix_buf));
1212 xo_open_list("flags_pretty");
1213 char rflags[6] = {}, *pflags = rflags;
1214 if (p->flags & ND_RA_FLAG_MANAGED) {
1215 *pflags++ = 'M';
1216 xo_emit("{el:%s}", "managed");
1217 }
1218 if (p->flags & ND_RA_FLAG_OTHER) {
1219 *pflags++ = 'O';
1220 xo_emit("{el:%s}", "other");
1221 }
1222 #ifdef DRAFT_IETF_6MAN_IPV6ONLY_FLAG
1223 if (p->flags & ND_RA_FLAG_IPV6_ONLY) {
1224 *pflags++ = 'S';
1225 xo_emit("{el:%s}", "ipv6only");
1226 }
1227 #endif
1228 xo_close_list("flags_pretty");
1229 xo_emit(", flags={:flags/%s}", rflags);
1230
1231 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1232 xo_emit(", pref={:preference/%s}", rtpref_str[rtpref]);
1233
1234 gettimeofday(&now, 0);
1235 if (p->expire == 0)
1236 xo_emit(", expire=Never\n{en:permanent/true}");
1237 else
1238 xo_emit("{d:/, expire=%s\n}{e:expires_sec/%ld}",
1239 sec2str(p->expire - now.tv_sec),
1240 (long)p->expire - now.tv_sec);
1241 xo_close_instance("router-list");
1242 }
1243 free(buf);
1244 xo_close_list("router-list");
1245 }
1246
1247 static void
plist(void)1248 plist(void)
1249 {
1250 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1251 char *buf;
1252 struct in6_prefix *p, *ep, *n;
1253 struct sockaddr_in6 *advrtr;
1254 size_t l;
1255 struct timeval now;
1256 const int niflags = NI_NUMERICHOST;
1257 int ninflags = opts.nflag ? NI_NUMERICHOST : 0;
1258 char namebuf[NI_MAXHOST];
1259
1260 if (sysctl(mib, nitems(mib), NULL, &l, NULL, 0) < 0) {
1261 xo_err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1262 /*NOTREACHED*/
1263 }
1264 buf = malloc(l);
1265 if (!buf) {
1266 xo_err(1, "malloc");
1267 /*NOTREACHED*/
1268 }
1269 if (sysctl(mib, nitems(mib), buf, &l, NULL, 0) < 0) {
1270 xo_err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1271 /*NOTREACHED*/
1272 }
1273
1274 xo_open_list("prefix-list");
1275
1276 ep = (struct in6_prefix *)(buf + l);
1277 for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1278 advrtr = (struct sockaddr_in6 *)(p + 1);
1279 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1280
1281 xo_open_instance("prefix-list");
1282 if (getnameinfo((struct sockaddr *)&p->prefix,
1283 p->prefix.sin6_len, namebuf, sizeof(namebuf),
1284 NULL, 0, niflags) != 0)
1285 strlcpy(namebuf, "?", sizeof(namebuf));
1286 xo_emit("{:prefix/%s%s%d} if={:interface/%s}\n", namebuf, "/",
1287 p->prefixlen, if_indextoname(p->if_index, ifix_buf));
1288
1289 gettimeofday(&now, 0);
1290 /*
1291 * meaning of fields, especially flags, is very different
1292 * by origin. notify the difference to the users.
1293 */
1294 char flags[10] = {}, *pflags = flags;
1295 xo_open_list("flags_pretty");
1296 if (p->raflags.onlink) {
1297 *pflags++ = 'L';
1298 xo_emit("{el:%s}", "ra_onlink");
1299 }
1300 if (p->raflags.autonomous) {
1301 *pflags++ = 'A';
1302 xo_emit("{el:%s}", "ra_autonomous");
1303 }
1304 if (p->flags & NDPRF_ONLINK) {
1305 *pflags++ = 'O';
1306 xo_emit("{el:%s}", "is_onlink");
1307 }
1308 if (p->flags & NDPRF_DETACHED) {
1309 *pflags++ = 'D';
1310 xo_emit("{el:%s}", "is_detached");
1311 }
1312 #ifdef NDPRF_HOME
1313 if (p->flags & NDPRF_HOME) {
1314 *pflags++ = 'H';
1315 xo_emit("{el:%s}", "is_home");
1316 }
1317 #endif
1318 xo_close_list("flags_pretty");
1319 xo_emit("flags={:flags/%s}", flags);
1320 int expire_in = p->expire - now.tv_sec;
1321
1322 if (p->vltime == ND6_INFINITE_LIFETIME)
1323 xo_emit(" vltime=infinity{e:valid-lifetime/%lu}",
1324 (unsigned long)p->vltime);
1325 else
1326 xo_emit(" vltime={:valid-lifetime/%lu}",
1327 (unsigned long)p->vltime);
1328 if (p->pltime == ND6_INFINITE_LIFETIME)
1329 xo_emit(", pltime=infinity{e:preferred-lifetime/%lu}",
1330 (unsigned long)p->pltime);
1331 else
1332 xo_emit(", pltime={:preferred-lifetime/%lu}",
1333 (unsigned long)p->pltime);
1334 if (p->expire == 0)
1335 xo_emit(", expire=Never{en:permanent/true}");
1336 else if (p->expire >= now.tv_sec)
1337 xo_emit(", expire=%s{e:expires_sec/%d}",
1338 sec2str(expire_in), expire_in);
1339 else
1340 xo_emit(", expired{e:expires_sec/%d}", expire_in);
1341 xo_emit(", ref={:refcount/%d}", p->refcnt);
1342 xo_emit("\n");
1343 /*
1344 * "advertising router" list is meaningful only if the prefix
1345 * information is from RA.
1346 */
1347 if (p->advrtrs) {
1348 int j;
1349 struct sockaddr_in6 *sin6;
1350
1351 sin6 = advrtr;
1352 xo_emit(" advertised by\n");
1353 xo_open_list("advertising-routers");
1354 for (j = 0; j < p->advrtrs; j++) {
1355 struct in6_nbrinfo *nbi;
1356
1357 xo_open_instance("advertising-routers");
1358 if (getnameinfo((struct sockaddr *)sin6,
1359 sin6->sin6_len, namebuf, sizeof(namebuf),
1360 NULL, 0, ninflags) != 0)
1361 strlcpy(namebuf, "?", sizeof(namebuf));
1362 char abuf[INET6_ADDRSTRLEN];
1363 inet_ntop(AF_INET6, &sin6->sin6_addr, abuf,
1364 sizeof(abuf));
1365
1366 xo_emit(" {:hostname/%s}{e:address/%s}",
1367 namebuf, abuf);
1368
1369 nbi = getnbrinfo(&sin6->sin6_addr,
1370 p->if_index, 0);
1371 const char *state = "";
1372 if (nbi) {
1373 switch (nbi->state) {
1374 case ND6_LLINFO_REACHABLE:
1375 case ND6_LLINFO_STALE:
1376 case ND6_LLINFO_DELAY:
1377 case ND6_LLINFO_PROBE:
1378 state = "reachable";
1379 break;
1380 default:
1381 state = "unreachable";
1382 }
1383 } else
1384 state = "no neighbor state";
1385 xo_emit(" ({:state/%s})\n", state);
1386 sin6++;
1387 xo_close_instance("advertising-routers");
1388 }
1389 xo_close_list("advertising-routers");
1390 } else
1391 xo_emit(" No advertising router\n");
1392 xo_close_instance("prefix-list");
1393 }
1394 free(buf);
1395
1396 xo_close_list("prefix-list");
1397 }
1398
1399 static void
pfx_flush(void)1400 pfx_flush(void)
1401 {
1402 char dummyif[IFNAMSIZ+8];
1403 int sock;
1404
1405 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1406 xo_err(1, "socket");
1407 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1408 if (ioctl(sock, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1409 xo_err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1410
1411 close(sock);
1412 }
1413
1414 static void
rtr_flush(void)1415 rtr_flush(void)
1416 {
1417 char dummyif[IFNAMSIZ+8];
1418 int sock;
1419
1420 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1421 xo_err(1, "socket");
1422 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1423 if (ioctl(sock, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1424 xo_err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1425
1426 close(sock);
1427 }
1428
1429 static void
harmonize_rtr(void)1430 harmonize_rtr(void)
1431 {
1432 char dummyif[IFNAMSIZ+8];
1433 int sock;
1434
1435 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1436 xo_err(1, "socket");
1437 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1438 if (ioctl(sock, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1439 xo_err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1440
1441 close(sock);
1442 }
1443
1444 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1445 static void
setdefif(char * ifname)1446 setdefif(char *ifname)
1447 {
1448 struct in6_ndifreq ndifreq;
1449 unsigned int ifindex;
1450 int sock;
1451
1452 if (strcasecmp(ifname, "delete") == 0)
1453 ifindex = 0;
1454 else {
1455 if ((ifindex = if_nametoindex(ifname)) == 0)
1456 xo_err(1, "failed to resolve i/f index for %s", ifname);
1457 }
1458
1459 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1460 xo_err(1, "socket");
1461
1462 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1463 ndifreq.ifindex = ifindex;
1464
1465 if (ioctl(sock, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1466 xo_err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1467
1468 close(sock);
1469 }
1470
1471 static void
getdefif(void)1472 getdefif(void)
1473 {
1474 struct in6_ndifreq ndifreq;
1475 char ifname[IFNAMSIZ+8];
1476 int sock;
1477
1478 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1479 xo_err(1, "socket");
1480
1481 memset(&ndifreq, 0, sizeof(ndifreq));
1482 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1483
1484 if (ioctl(sock, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1485 xo_err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1486
1487 if (ndifreq.ifindex == 0)
1488 xo_emit("No default interface.\n");
1489 else {
1490 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1491 xo_err(1, "failed to resolve ifname for index %lu",
1492 ndifreq.ifindex);
1493 xo_emit("ND default interface = {:default-interface/%s}\n", ifname);
1494 }
1495
1496 close(sock);
1497 }
1498 #endif /* SIOCSDEFIFACE_IN6 */
1499
1500 char *
sec2str(time_t total)1501 sec2str(time_t total)
1502 {
1503 static char result[256];
1504 int days, hours, mins, secs;
1505 int first = 1;
1506 char *p = result;
1507 char *ep = &result[sizeof(result)];
1508 int n;
1509
1510 days = total / 3600 / 24;
1511 hours = (total / 3600) % 24;
1512 mins = (total / 60) % 60;
1513 secs = total % 60;
1514
1515 if (days) {
1516 first = 0;
1517 n = snprintf(p, ep - p, "%dd", days);
1518 if (n < 0 || n >= ep - p)
1519 return "?";
1520 p += n;
1521 }
1522 if (!first || hours) {
1523 first = 0;
1524 n = snprintf(p, ep - p, "%dh", hours);
1525 if (n < 0 || n >= ep - p)
1526 return "?";
1527 p += n;
1528 }
1529 if (!first || mins) {
1530 first = 0;
1531 n = snprintf(p, ep - p, "%dm", mins);
1532 if (n < 0 || n >= ep - p)
1533 return "?";
1534 p += n;
1535 }
1536 snprintf(p, ep - p, "%ds", secs);
1537
1538 return(result);
1539 }
1540
1541 /*
1542 * Print the timestamp
1543 * from tcpdump/util.c
1544 */
1545 void
ts_print(const struct timeval * tvp)1546 ts_print(const struct timeval *tvp)
1547 {
1548 int sec;
1549
1550 /* Default */
1551 sec = (tvp->tv_sec + thiszone) % 86400;
1552 xo_emit("{e:tv_sec/%lld}{e:tv_usec/%lld}{d:/%02d:%02d:%02d.%06u} ",
1553 tvp->tv_sec, tvp->tv_usec,
1554 sec / 3600, (sec % 3600) / 60, sec % 60, (u_int32_t)tvp->tv_usec);
1555 }
1556
1557 #undef NEXTADDR
1558