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 <stdint.h>
107 #include <stdlib.h>
108 #include <fcntl.h>
109 #include <unistd.h>
110 #include <libxo/xo.h>
111 #include <time.h>
112
113 #include "ndp.h"
114
115 #define NEXTADDR(w, s) \
116 if (rtm->rtm_addrs & (w)) { \
117 bcopy((char *)&s, cp, sizeof(s)); \
118 cp += SA_SIZE(&s); \
119 }
120
121 static pid_t pid;
122 static int32_t thiszone; /* time difference with gmt */
123 static int s = -1;
124
125 static char host_buf[NI_MAXHOST]; /* getnameinfo() */
126 static char ifix_buf[IFNAMSIZ]; /* if_indextoname() */
127
128 static int file(char *);
129 static int set(int, char **);
130 static void get(char *);
131 static int delete(char *);
132 static int dump(struct sockaddr_in6 *, int);
133 static struct in6_nbrinfo *getnbrinfo(struct in6_addr *, int, int);
134 static int ndp_ether_aton(char *, u_char *);
135 static void usage(void) __dead2;
136 static void ifinfo(char *, int, char **);
137 static void rtrlist(void);
138 static void plist(void);
139 static void pfx_flush(void);
140 static void rtr_flush(void);
141 static void harmonize_rtr(void);
142 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */
143 static void getdefif(void);
144 static void setdefif(char *);
145 #endif
146
147 #ifdef WITHOUT_NETLINK
148 static void getsocket(void);
149 static int rtmsg(int);
150 #endif
151
152 static const char *rtpref_str[] = {
153 "medium", /* 00 */
154 "high", /* 01 */
155 "rsv", /* 10 */
156 "low" /* 11 */
157 };
158
159 struct ndp_opts opts = {};
160
161 #define NDP_XO_VERSION "1"
162
163 bool
valid_type(int if_type)164 valid_type(int if_type)
165 {
166 switch (if_type) {
167 case IFT_ETHER:
168 case IFT_FDDI:
169 case IFT_ISO88023:
170 case IFT_ISO88024:
171 case IFT_ISO88025:
172 case IFT_L2VLAN:
173 case IFT_BRIDGE:
174 return (true);
175 break;
176 }
177 return (false);
178 }
179
180 static int32_t
utc_offset(void)181 utc_offset(void)
182 {
183 time_t t;
184 struct tm *tm;
185
186 t = time(NULL);
187 tm = localtime(&t);
188
189 assert(tm->tm_gmtoff > INT32_MIN && tm->tm_gmtoff < INT32_MAX);
190
191 return (tm->tm_gmtoff);
192 }
193
194 int
main(int argc,char ** argv)195 main(int argc, char **argv)
196 {
197 int ch, mode = 0;
198 char *arg = NULL;
199 int ret = 0;
200
201 pid = getpid();
202 thiszone = utc_offset();
203
204 argc = xo_parse_args(argc, argv);
205 if (argc < 0)
206 exit(1);
207 xo_set_version(NDP_XO_VERSION);
208 xo_open_container("ndp");
209
210 while ((ch = getopt(argc, argv, "acd:f:Ii:nprstA:HPR")) != -1)
211 switch (ch) {
212 case 'a':
213 case 'c':
214 case 'p':
215 case 'r':
216 case 'H':
217 case 'P':
218 case 'R':
219 case 's':
220 case 'I':
221 if (mode) {
222 usage();
223 /*NOTREACHED*/
224 }
225 mode = ch;
226 arg = NULL;
227 break;
228 case 'f':
229 exit(file(optarg) ? 1 : 0);
230 case 'd':
231 case 'i':
232 if (mode) {
233 usage();
234 /*NOTREACHED*/
235 }
236 mode = ch;
237 arg = optarg;
238 break;
239 case 'n':
240 opts.nflag = true;
241 break;
242 case 't':
243 opts.tflag = true;
244 break;
245 case 'A':
246 if (mode) {
247 usage();
248 /*NOTREACHED*/
249 }
250 mode = 'a';
251 opts.repeat = atoi(optarg);
252 if (opts.repeat < 0) {
253 usage();
254 /*NOTREACHED*/
255 }
256 break;
257 default:
258 usage();
259 }
260
261 argc -= optind;
262 argv += optind;
263
264 switch (mode) {
265 case 'a':
266 case 'c':
267 if (argc != 0) {
268 usage();
269 /*NOTREACHED*/
270 }
271 dump(0, mode == 'c');
272 break;
273 case 'd':
274 if (argc != 0) {
275 usage();
276 /*NOTREACHED*/
277 }
278 xo_open_list("neighbor-cache");
279 ret = delete(arg);
280 xo_close_list("neighbor-cache");
281 break;
282 case 'I':
283 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */
284 if (argc > 1) {
285 usage();
286 /*NOTREACHED*/
287 } else if (argc == 1) {
288 if (strcmp(*argv, "delete") == 0 ||
289 if_nametoindex(*argv))
290 setdefif(*argv);
291 else
292 xo_errx(1, "invalid interface %s", *argv);
293 }
294 getdefif(); /* always call it to print the result */
295 break;
296 #else
297 xo_errx(1, "not supported yet");
298 /*NOTREACHED*/
299 #endif
300 case 'p':
301 if (argc != 0) {
302 usage();
303 /*NOTREACHED*/
304 }
305 plist();
306 break;
307 case 'i':
308 ifinfo(arg, argc, argv);
309 break;
310 case 'r':
311 if (argc != 0) {
312 usage();
313 /*NOTREACHED*/
314 }
315 rtrlist();
316 break;
317 case 's':
318 if (argc < 2 || argc > 4)
319 usage();
320 exit(set(argc, argv) ? 1 : 0);
321 case 'H':
322 if (argc != 0) {
323 usage();
324 /*NOTREACHED*/
325 }
326 harmonize_rtr();
327 break;
328 case 'P':
329 if (argc != 0) {
330 usage();
331 /*NOTREACHED*/
332 }
333 pfx_flush();
334 break;
335 case 'R':
336 if (argc != 0) {
337 usage();
338 /*NOTREACHED*/
339 }
340 rtr_flush();
341 break;
342 case 0:
343 if (argc != 1) {
344 usage();
345 /*NOTREACHED*/
346 }
347 get(argv[0]);
348 break;
349 }
350 xo_close_container("ndp");
351 if (xo_finish() < 0)
352 xo_err(1, "stdout");
353
354 return (ret);
355 }
356
357 /*
358 * Process a file to set standard ndp entries
359 */
360 static int
file(char * name)361 file(char *name)
362 {
363 FILE *fp;
364 int i, retval;
365 char line[100], arg[5][50], *args[5], *p;
366
367 if ((fp = fopen(name, "r")) == NULL)
368 xo_err(1, "cannot open %s", name);
369 args[0] = &arg[0][0];
370 args[1] = &arg[1][0];
371 args[2] = &arg[2][0];
372 args[3] = &arg[3][0];
373 args[4] = &arg[4][0];
374 retval = 0;
375 while (fgets(line, sizeof(line), fp) != NULL) {
376 if ((p = strchr(line, '#')) != NULL)
377 *p = '\0';
378 for (p = line; isblank(*p); p++);
379 if (*p == '\n' || *p == '\0')
380 continue;
381 i = sscanf(line, "%49s %49s %49s %49s %49s",
382 arg[0], arg[1], arg[2], arg[3], arg[4]);
383 if (i < 2) {
384 xo_warnx("bad line: %s", line);
385 retval = 1;
386 continue;
387 }
388 if (set(i, args))
389 retval = 1;
390 }
391 fclose(fp);
392 return (retval);
393 }
394
395 static void
getsocket(void)396 getsocket(void)
397 {
398 if (s < 0) {
399 s = socket(PF_ROUTE, SOCK_RAW, 0);
400 if (s < 0) {
401 xo_err(1, "socket");
402 /* NOTREACHED */
403 }
404 }
405 }
406
407 static struct sockaddr_in6 so_mask = {
408 .sin6_len = sizeof(so_mask),
409 .sin6_family = AF_INET6
410 };
411 static struct sockaddr_in6 blank_sin = {
412 .sin6_len = sizeof(blank_sin),
413 .sin6_family = AF_INET6
414 };
415 static struct sockaddr_in6 sin_m;
416 static struct sockaddr_dl blank_sdl = {
417 .sdl_len = sizeof(blank_sdl),
418 .sdl_family = AF_LINK
419 };
420 static struct sockaddr_dl sdl_m;
421 #ifdef WITHOUT_NETLINK
422 static struct {
423 struct rt_msghdr m_rtm;
424 char m_space[512];
425 } m_rtmsg;
426 #endif
427
428 /*
429 * Set an individual neighbor cache entry
430 */
431 static int
set(int argc,char ** argv)432 set(int argc, char **argv)
433 {
434 struct sockaddr_in6 *sin = &sin_m;
435 int gai_error;
436 u_char *ea;
437 char *host = argv[0], *eaddr = argv[1];
438
439 argc -= 2;
440 argv += 2;
441 sdl_m = blank_sdl;
442 sin_m = blank_sin;
443
444 gai_error = getaddr(host, sin);
445 if (gai_error) {
446 xo_warnx("%s: %s", host, gai_strerror(gai_error));
447 return 1;
448 }
449
450 ea = (u_char *)LLADDR(&sdl_m);
451 if (ndp_ether_aton(eaddr, ea) == 0)
452 sdl_m.sdl_alen = 6;
453 while (argc-- > 0) {
454 if (strncmp(argv[0], "temp", 4) == 0) {
455 struct timeval now;
456
457 gettimeofday(&now, 0);
458 opts.expire_time = now.tv_sec + 20 * 60;
459 } else if (strncmp(argv[0], "proxy", 5) == 0)
460 opts.flags |= RTF_ANNOUNCE;
461 argv++;
462 }
463
464 #ifndef WITHOUT_NETLINK
465 return (set_nl(0, sin, &sdl_m, host));
466 #else
467 struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
468 struct sockaddr_dl *sdl;
469
470 getsocket();
471
472 if (rtmsg(RTM_GET) < 0) {
473 xo_errx(1, "RTM_GET(%s) failed", host);
474 /* NOTREACHED */
475 }
476 sin = (struct sockaddr_in6 *)(rtm + 1);
477 sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
478 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
479 if (sdl->sdl_family == AF_LINK &&
480 !(rtm->rtm_flags & RTF_GATEWAY)) {
481 if (valid_type(sdl->sdl_type))
482 goto overwrite;
483 }
484 xo_warnx("cannot configure a new entry");
485 return 1;
486 }
487
488 overwrite:
489 if (sdl->sdl_family != AF_LINK) {
490 xo_warnx("cannot intuit interface index and type for %s", host);
491 return (1);
492 }
493 sdl_m.sdl_type = sdl->sdl_type;
494 sdl_m.sdl_index = sdl->sdl_index;
495 return (rtmsg(RTM_ADD));
496 #endif
497 }
498
499 int
getaddr(char * host,struct sockaddr_in6 * sin6)500 getaddr(char *host, struct sockaddr_in6 *sin6)
501 {
502 struct addrinfo hints = { .ai_family = AF_INET6 };
503 struct addrinfo *res;
504
505 int gai_error = getaddrinfo(host, NULL, &hints, &res);
506 if (gai_error != 0)
507 return (gai_error);
508 sin6->sin6_family = AF_INET6;
509 sin6->sin6_len = sizeof(*sin6);
510 sin6->sin6_addr = ((struct sockaddr_in6 *)res->ai_addr)->sin6_addr;
511 sin6->sin6_scope_id =
512 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
513 return (0);
514 }
515
516 /*
517 * Display an individual neighbor cache entry
518 */
519 static void
get(char * host)520 get(char *host)
521 {
522 struct sockaddr_in6 *sin = &sin_m;
523 int gai_error;
524
525 sin_m = blank_sin;
526
527 gai_error = getaddr(host, sin);
528 if (gai_error) {
529 xo_warnx("%s: %s", host, gai_strerror(gai_error));
530 return;
531 }
532 if (dump(sin, 0) == 0) {
533 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
534 sizeof(host_buf), NULL ,0,
535 (opts.nflag ? NI_NUMERICHOST : 0));
536 xo_errx(1, "%s (%s) -- no entry", host, host_buf);
537 }
538 }
539
540 #ifdef WITHOUT_NETLINK
541 /*
542 * Delete a neighbor cache entry
543 */
544 static int
delete_rtsock(char * host)545 delete_rtsock(char *host)
546 {
547 struct sockaddr_in6 *sin = &sin_m;
548 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
549 register char *cp = m_rtmsg.m_space;
550 struct sockaddr_dl *sdl;
551 int gai_error;
552
553 getsocket();
554 sin_m = blank_sin;
555
556 gai_error = getaddr(host, sin);
557 if (gai_error) {
558 xo_warnx("%s: %s", host, gai_strerror(gai_error));
559 return 1;
560 }
561
562 if (rtmsg(RTM_GET) < 0) {
563 xo_errx(1, "RTM_GET(%s) failed", host);
564 /* NOTREACHED */
565 }
566 sin = (struct sockaddr_in6 *)(rtm + 1);
567 sdl = (struct sockaddr_dl *)(ALIGN(sin->sin6_len) + (char *)sin);
568 if (IN6_ARE_ADDR_EQUAL(&sin->sin6_addr, &sin_m.sin6_addr)) {
569 if (sdl->sdl_family == AF_LINK &&
570 !(rtm->rtm_flags & RTF_GATEWAY)) {
571 goto delete;
572 }
573 xo_warnx("delete: cannot delete non-NDP entry");
574 return 1;
575 }
576
577 delete:
578 if (sdl->sdl_family != AF_LINK) {
579 xo_warnx("cannot locate %s", host);
580 return (1);
581 }
582 /*
583 * need to reinit the field because it has rt_key
584 * but we want the actual address
585 */
586 NEXTADDR(RTA_DST, sin_m);
587 rtm->rtm_flags |= RTF_LLDATA;
588 if (rtmsg(RTM_DELETE) == 0) {
589 getnameinfo((struct sockaddr *)sin,
590 sin->sin6_len, host_buf,
591 sizeof(host_buf), NULL, 0,
592 (opts.nflag ? NI_NUMERICHOST : 0));
593 xo_open_instance("neighbor-cache");
594
595 char *ifname = if_indextoname(sdl->sdl_index, ifix_buf);
596 if (ifname == NULL) {
597 strlcpy(ifix_buf, "?", sizeof(ifix_buf));
598 ifname = ifix_buf;
599 }
600 char abuf[INET6_ADDRSTRLEN];
601 inet_ntop(AF_INET6, &sin->sin6_addr, abuf, sizeof(abuf));
602
603 xo_emit("{:hostname/%s}{d:/ (%s) deleted\n}", host, host_buf);
604 xo_emit("{e:address/%s}{e:interface/%s}", abuf, ifname);
605 xo_close_instance("neighbor-cache");
606 }
607
608 return 0;
609 }
610
611 /*
612 * Dump the entire neighbor cache
613 */
614 static int
dump_rtsock(struct sockaddr_in6 * addr,int cflag)615 dump_rtsock(struct sockaddr_in6 *addr, int cflag)
616 {
617 int mib[6];
618 size_t needed;
619 char *lim, *buf, *next;
620 struct rt_msghdr *rtm;
621 struct sockaddr_in6 *sin;
622 struct sockaddr_dl *sdl;
623 struct timeval now;
624 time_t expire;
625 int addrwidth;
626 int llwidth;
627 int ifwidth;
628 char flgbuf[8];
629 char *ifname;
630
631 /* Print header */
632 if (!opts.tflag && !cflag) {
633 char xobuf[200];
634 snprintf(xobuf, sizeof(xobuf),
635 "{T:/%%-%d.%ds} {T:/%%-%d.%ds} {T:/%%%d.%ds} {T:/%%-9.9s} {T:/%%1s} {T:/%%5s}\n",
636 W_ADDR, W_ADDR, W_LL, W_LL, W_IF, W_IF);
637 xo_emit(xobuf, "Neighbor", "Linklayer Address", "Netif", "Expire", "S", "Flags");
638 }
639 xo_open_list("neighbor-cache");
640 again:
641 mib[0] = CTL_NET;
642 mib[1] = PF_ROUTE;
643 mib[2] = 0;
644 mib[3] = AF_INET6;
645 mib[4] = NET_RT_FLAGS;
646 #ifdef RTF_LLINFO
647 mib[5] = RTF_LLINFO;
648 #else
649 mib[5] = 0;
650 #endif
651 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
652 xo_err(1, "sysctl(PF_ROUTE estimate)");
653 if (needed > 0) {
654 /*
655 * Add ~2% additional space in case some records
656 * will appear between sysctl() calls.
657 * Round it up so it can fit 4 additional messages at least.
658 */
659 needed += ((needed >> 6) | (sizeof(m_rtmsg) * 4));
660 if ((buf = malloc(needed)) == NULL)
661 xo_err(1, "malloc");
662 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
663 xo_err(1, "sysctl(PF_ROUTE, NET_RT_FLAGS)");
664 lim = buf + needed;
665 } else
666 buf = lim = NULL;
667
668 int count = 0;
669 for (next = buf; next && next < lim; next += rtm->rtm_msglen) {
670 int isrouter = 0, prbs = 0;
671
672 rtm = (struct rt_msghdr *)next;
673 sin = (struct sockaddr_in6 *)(rtm + 1);
674 sdl = (struct sockaddr_dl *)((char *)sin +
675 ALIGN(sin->sin6_len));
676
677 /*
678 * Some OSes can produce a route that has the LINK flag but
679 * has a non-AF_LINK gateway (e.g. fe80::xx%lo0 on FreeBSD
680 * and BSD/OS, where xx is not the interface identifier on
681 * lo0). Such routes entry would annoy getnbrinfo() below,
682 * so we skip them.
683 * XXX: such routes should have the GATEWAY flag, not the
684 * LINK flag. However, there is rotten routing software
685 * that advertises all routes that have the GATEWAY flag.
686 * Thus, KAME kernel intentionally does not set the LINK flag.
687 * What is to be fixed is not ndp, but such routing software
688 * (and the kernel workaround)...
689 */
690 if (sdl->sdl_family != AF_LINK)
691 continue;
692
693 if (!(rtm->rtm_flags & RTF_HOST))
694 continue;
695
696 if (addr) {
697 if (IN6_ARE_ADDR_EQUAL(&addr->sin6_addr,
698 &sin->sin6_addr) == 0 ||
699 addr->sin6_scope_id != sin->sin6_scope_id)
700 continue;
701 } else if (IN6_IS_ADDR_MULTICAST(&sin->sin6_addr))
702 continue;
703 count++;
704 if (IN6_IS_ADDR_LINKLOCAL(&sin->sin6_addr) ||
705 IN6_IS_ADDR_MC_LINKLOCAL(&sin->sin6_addr)) {
706 /* XXX: should scope id be filled in the kernel? */
707 if (sin->sin6_scope_id == 0)
708 sin->sin6_scope_id = sdl->sdl_index;
709 }
710 getnameinfo((struct sockaddr *)sin, sin->sin6_len, host_buf,
711 sizeof(host_buf), NULL, 0, (opts.nflag ? NI_NUMERICHOST : 0));
712 if (cflag) {
713 #ifdef RTF_WASCLONED
714 if (rtm->rtm_flags & RTF_WASCLONED)
715 delete(host_buf);
716 #elif defined(RTF_CLONED)
717 if (rtm->rtm_flags & RTF_CLONED)
718 delete(host_buf);
719 #else
720 if (rtm->rtm_flags & RTF_PINNED)
721 continue;
722 delete(host_buf);
723 #endif
724 continue;
725 }
726 gettimeofday(&now, 0);
727 if (opts.tflag)
728 ts_print(&now);
729
730 addrwidth = strlen(host_buf);
731 if (addrwidth < W_ADDR)
732 addrwidth = W_ADDR;
733 llwidth = strlen(ether_str(sdl));
734 if (W_ADDR + W_LL - addrwidth > llwidth)
735 llwidth = W_ADDR + W_LL - addrwidth;
736 ifname = if_indextoname(sdl->sdl_index, ifix_buf);
737 if (ifname == NULL) {
738 strlcpy(ifix_buf, "?", sizeof(ifix_buf));
739 ifname = ifix_buf;
740 }
741 ifwidth = strlen(ifname);
742 if (W_ADDR + W_LL + W_IF - addrwidth - llwidth > ifwidth)
743 ifwidth = W_ADDR + W_LL + W_IF - addrwidth - llwidth;
744
745 xo_open_instance("neighbor-cache");
746 /* Compose format string for libxo, as it doesn't support *.* */
747 char xobuf[200];
748 snprintf(xobuf, sizeof(xobuf),
749 "{:address/%%-%d.%ds/%%s} {:mac-address/%%-%d.%ds/%%s} {:interface/%%%d.%ds/%%s}",
750 addrwidth, addrwidth, llwidth, llwidth, ifwidth, ifwidth);
751 xo_emit(xobuf, host_buf, ether_str(sdl), ifname);
752
753 /* Print neighbor discovery specific information */
754 expire = rtm->rtm_rmx.rmx_expire;
755 int expire_in = expire - now.tv_sec;
756 if (expire > now.tv_sec)
757 xo_emit("{d:/ %-9.9s}{e:expires_sec/%d}", sec2str(expire_in), expire_in);
758 else if (expire == 0)
759 xo_emit("{d:/ %-9.9s}{en:permanent/true}", "permanent");
760 else
761 xo_emit("{d:/ %-9.9s}{e:expires_sec/%d}", "expired", expire_in);
762
763 char *lle_state = "";
764 switch (rtm->rtm_rmx.rmx_state) {
765 case ND6_LLINFO_NOSTATE:
766 lle_state = "N";
767 break;
768 #ifdef ND6_LLINFO_WAITDELETE
769 case ND6_LLINFO_WAITDELETE:
770 lle_state = "W";
771 break;
772 #endif
773 case ND6_LLINFO_INCOMPLETE:
774 lle_state = "I";
775 break;
776 case ND6_LLINFO_REACHABLE:
777 lle_state = "R";
778 break;
779 case ND6_LLINFO_STALE:
780 lle_state = "S";
781 break;
782 case ND6_LLINFO_DELAY:
783 lle_state = "D";
784 break;
785 case ND6_LLINFO_PROBE:
786 lle_state = "P";
787 break;
788 default:
789 lle_state = "?";
790 break;
791 }
792 xo_emit(" {:neighbor-state/%s}", lle_state);
793
794 isrouter = rtm->rtm_flags & RTF_GATEWAY;
795 prbs = rtm->rtm_rmx.rmx_pksent;
796
797 /*
798 * other flags. R: router, P: proxy, W: ??
799 */
800 if ((rtm->rtm_addrs & RTA_NETMASK) == 0) {
801 snprintf(flgbuf, sizeof(flgbuf), "%s%s",
802 isrouter ? "R" : "",
803 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
804 } else {
805 #if 0 /* W and P are mystery even for us */
806 sin = (struct sockaddr_in6 *)
807 (sdl->sdl_len + (char *)sdl);
808 snprintf(flgbuf, sizeof(flgbuf), "%s%s%s%s",
809 isrouter ? "R" : "",
810 !IN6_IS_ADDR_UNSPECIFIED(&sin->sin6_addr) ? "P" : "",
811 (sin->sin6_len != sizeof(struct sockaddr_in6)) ? "W" : "",
812 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
813 #else
814 snprintf(flgbuf, sizeof(flgbuf), "%s%s",
815 isrouter ? "R" : "",
816 (rtm->rtm_flags & RTF_ANNOUNCE) ? "p" : "");
817 #endif
818 }
819 xo_emit(" {:nd-flags/%s}", flgbuf);
820
821 if (prbs)
822 xo_emit("{d:/ %d}", prbs);
823
824 xo_emit("\n");
825 xo_close_instance("neighbor-cache");
826 }
827 if (buf != NULL)
828 free(buf);
829
830 if (opts.repeat) {
831 xo_emit("\n");
832 xo_flush();
833 sleep(opts.repeat);
834 goto again;
835 }
836
837 xo_close_list("neighbor-cache");
838
839 return (count);
840 }
841 #endif
842
843
844 static int
delete(char * host)845 delete(char *host)
846 {
847 #ifndef WITHOUT_NETLINK
848 return (delete_nl(0, host, true)); /* do warn */
849 #else
850 return (delete_rtsock(host));
851 #endif
852 }
853
854 static int
dump(struct sockaddr_in6 * addr,int cflag)855 dump(struct sockaddr_in6 *addr, int cflag)
856 {
857 #ifndef WITHOUT_NETLINK
858 return (print_entries_nl(0, addr, cflag));
859 #else
860 return (dump_rtsock(addr, cflag));
861 #endif
862 }
863
864 static struct in6_nbrinfo *
getnbrinfo(struct in6_addr * addr,int ifindex,int warning)865 getnbrinfo(struct in6_addr *addr, int ifindex, int warning)
866 {
867 static struct in6_nbrinfo nbi;
868 int sock;
869
870 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
871 xo_err(1, "socket");
872
873 bzero(&nbi, sizeof(nbi));
874 if_indextoname(ifindex, nbi.ifname);
875 nbi.addr = *addr;
876 if (ioctl(sock, SIOCGNBRINFO_IN6, (caddr_t)&nbi) < 0) {
877 if (warning)
878 xo_warn("ioctl(SIOCGNBRINFO_IN6)");
879 close(sock);
880 return(NULL);
881 }
882
883 close(sock);
884 return(&nbi);
885 }
886
887 char *
ether_str(struct sockaddr_dl * sdl)888 ether_str(struct sockaddr_dl *sdl)
889 {
890 static char hbuf[NI_MAXHOST];
891
892 if (sdl->sdl_alen == ETHER_ADDR_LEN) {
893 strlcpy(hbuf, ether_ntoa((struct ether_addr *)LLADDR(sdl)),
894 sizeof(hbuf));
895 } else if (sdl->sdl_alen) {
896 int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;
897 snprintf(hbuf, sizeof(hbuf), "%s", link_ntoa(sdl) + n);
898 } else
899 snprintf(hbuf, sizeof(hbuf), "(incomplete)");
900
901 return(hbuf);
902 }
903
904 static int
ndp_ether_aton(char * a,u_char * n)905 ndp_ether_aton(char *a, u_char *n)
906 {
907 int i, o[6];
908
909 i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2],
910 &o[3], &o[4], &o[5]);
911 if (i != 6) {
912 xo_warnx("invalid Ethernet address '%s'", a);
913 return (1);
914 }
915 for (i = 0; i < 6; i++)
916 n[i] = o[i];
917 return (0);
918 }
919
920 static void
usage(void)921 usage(void)
922 {
923 xo_error("usage: ndp [-nt] hostname\n");
924 xo_error(" ndp [-nt] -a | -c | -p | -r | -H | -P | -R\n");
925 xo_error(" ndp [-nt] -A wait\n");
926 xo_error(" ndp [-nt] -d hostname\n");
927 xo_error(" ndp [-nt] -f filename\n");
928 xo_error(" ndp [-nt] -i interface [flags...]\n");
929 #ifdef SIOCSDEFIFACE_IN6
930 xo_error(" ndp [-nt] -I [interface|delete]\n");
931 #endif
932 xo_error(" ndp [-nt] -s nodename etheraddr [temp] [proxy]\n");
933 exit(1);
934 }
935
936 #ifdef WITHOUT_NETLINK
937 static int
rtmsg(int cmd)938 rtmsg(int cmd)
939 {
940 static int seq;
941 int rlen;
942 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
943 register char *cp = m_rtmsg.m_space;
944 register int l;
945
946 errno = 0;
947 if (cmd == RTM_DELETE)
948 goto doit;
949 bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
950 rtm->rtm_flags = opts.flags;
951 rtm->rtm_version = RTM_VERSION;
952
953 switch (cmd) {
954 default:
955 xo_errx(1, "internal wrong cmd");
956 case RTM_ADD:
957 rtm->rtm_addrs |= RTA_GATEWAY;
958 if (opts.expire_time) {
959 rtm->rtm_rmx.rmx_expire = opts.expire_time;
960 rtm->rtm_inits = RTV_EXPIRE;
961 }
962 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
963 /* FALLTHROUGH */
964 case RTM_GET:
965 rtm->rtm_addrs |= RTA_DST;
966 }
967
968 NEXTADDR(RTA_DST, sin_m);
969 NEXTADDR(RTA_GATEWAY, sdl_m);
970
971 rtm->rtm_msglen = cp - (char *)&m_rtmsg;
972 doit:
973 l = rtm->rtm_msglen;
974 rtm->rtm_seq = ++seq;
975 rtm->rtm_type = cmd;
976 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
977 if (errno != ESRCH || cmd != RTM_DELETE) {
978 xo_err(1, "writing to routing socket");
979 /* NOTREACHED */
980 }
981 }
982 do {
983 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
984 } while (l > 0 && (rtm->rtm_type != cmd || rtm->rtm_seq != seq ||
985 rtm->rtm_pid != pid));
986 if (l < 0)
987 xo_warn("read from routing socket");
988 return (0);
989 }
990 #endif
991
992 static void
ifinfo(char * ifname,int argc,char ** argv)993 ifinfo(char *ifname, int argc, char **argv)
994 {
995 struct in6_ndireq nd;
996 int i, sock;
997 u_int32_t newflags;
998 #ifdef IPV6CTL_USETEMPADDR
999 u_int8_t nullbuf[8];
1000 #endif
1001
1002 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
1003 xo_err(1, "socket");
1004 /* NOTREACHED */
1005 }
1006 bzero(&nd, sizeof(nd));
1007 strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
1008 if (ioctl(sock, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1009 xo_err(1, "ioctl(SIOCGIFINFO_IN6)");
1010 /* NOTREACHED */
1011 }
1012 #define ND nd.ndi
1013 newflags = ND.flags;
1014 for (i = 0; i < argc; i++) {
1015 int clear = 0;
1016 char *cp = argv[i];
1017
1018 if (*cp == '-') {
1019 clear = 1;
1020 cp++;
1021 }
1022
1023 #define SETFLAG(s, f) do { \
1024 if (strcmp(cp, (s)) == 0) { \
1025 if (clear) \
1026 newflags &= ~(f); \
1027 else \
1028 newflags |= (f); \
1029 } \
1030 } while (0)
1031 /*
1032 * XXX: this macro is not 100% correct, in that it matches "nud" against
1033 * "nudbogus". But we just let it go since this is minor.
1034 */
1035 #define SETVALUE(f, v) do { \
1036 char *valptr; \
1037 unsigned long newval; \
1038 v = 0; /* unspecified */ \
1039 if (strncmp(cp, f, strlen(f)) == 0) { \
1040 valptr = strchr(cp, '='); \
1041 if (valptr == NULL) \
1042 xo_err(1, "syntax error in %s field", (f)); \
1043 errno = 0; \
1044 newval = strtoul(++valptr, NULL, 0); \
1045 if (errno) \
1046 xo_err(1, "syntax error in %s's value", (f)); \
1047 v = newval; \
1048 } \
1049 } while (0)
1050
1051 SETFLAG("disabled", ND6_IFF_IFDISABLED);
1052 SETFLAG("nud", ND6_IFF_PERFORMNUD);
1053 #ifdef ND6_IFF_ACCEPT_RTADV
1054 SETFLAG("accept_rtadv", ND6_IFF_ACCEPT_RTADV);
1055 #endif
1056 #ifdef ND6_IFF_AUTO_LINKLOCAL
1057 SETFLAG("auto_linklocal", ND6_IFF_AUTO_LINKLOCAL);
1058 #endif
1059 #ifdef ND6_IFF_NO_PREFER_IFACE
1060 SETFLAG("no_prefer_iface", ND6_IFF_NO_PREFER_IFACE);
1061 #endif
1062 SETVALUE("basereachable", ND.basereachable);
1063 SETVALUE("retrans", ND.retrans);
1064 SETVALUE("curhlim", ND.chlim);
1065
1066 ND.flags = newflags;
1067 if (ioctl(sock, SIOCSIFINFO_IN6, (caddr_t)&nd) < 0) {
1068 xo_err(1, "ioctl(SIOCSIFINFO_IN6)");
1069 /* NOTREACHED */
1070 }
1071 #undef SETFLAG
1072 #undef SETVALUE
1073 }
1074
1075 if (!ND.initialized) {
1076 xo_errx(1, "%s: not initialized yet", ifname);
1077 /* NOTREACHED */
1078 }
1079
1080 if (ioctl(sock, SIOCGIFINFO_IN6, (caddr_t)&nd) < 0) {
1081 xo_err(1, "ioctl(SIOCGIFINFO_IN6)");
1082 /* NOTREACHED */
1083 }
1084 xo_open_container("ifinfo");
1085
1086 xo_emit("{e:interface/%s}", ifname);
1087 xo_emit("linkmtu={:linkmtu/%d}", ND.linkmtu);
1088 xo_emit(", maxmtu={:maxmtu/%d}", ND.maxmtu);
1089 xo_emit(", curhlim={:curhlim/%d}", ND.chlim);
1090 xo_emit("{d:/, basereachable=%ds%dms}{e:basereachable_ms/%u}",
1091 ND.basereachable / 1000, ND.basereachable % 1000, ND.basereachable);
1092 xo_emit("{d:/, reachable=%ds}{e:reachable_ms/%u}", ND.reachable, ND.reachable * 1000);
1093 xo_emit("{d:/, retrans=%ds%dms}{e:retrans_ms/%u}", ND.retrans / 1000, ND.retrans % 1000,
1094 ND.retrans);
1095 #ifdef IPV6CTL_USETEMPADDR
1096 memset(nullbuf, 0, sizeof(nullbuf));
1097 if (memcmp(nullbuf, ND.randomid, sizeof(nullbuf)) != 0) {
1098 int j;
1099 u_int8_t *rbuf;
1100
1101 for (i = 0; i < 3; i++) {
1102 const char *txt, *field;
1103 switch (i) {
1104 case 0:
1105 txt = "\nRandom seed(0): ";
1106 field = "seed_0";
1107 rbuf = ND.randomseed0;
1108 break;
1109 case 1:
1110 txt = "\nRandom seed(1): ";
1111 field = "seed_1";
1112 rbuf = ND.randomseed1;
1113 break;
1114 case 2:
1115 txt = "\nRandom ID: ";
1116 field = "random_id";
1117 rbuf = ND.randomid;
1118 break;
1119 default:
1120 xo_errx(1, "impossible case for tempaddr display");
1121 }
1122 char abuf[20], xobuf[200];
1123 for (j = 0; j < 8; j++)
1124 snprintf(&abuf[j * 2], sizeof(abuf), "%02X", rbuf[j]);
1125 snprintf(xobuf, sizeof(xobuf), "%s{:%s/%%s}", txt, field);
1126 xo_emit(xobuf, abuf);
1127 }
1128 }
1129 #endif /* IPV6CTL_USETEMPADDR */
1130 if (ND.flags) {
1131 xo_emit("\nFlags: {e:flags/%u}", ND.flags);
1132 xo_open_list("flags_pretty");
1133 #ifdef ND6_IFF_IFDISABLED
1134 if ((ND.flags & ND6_IFF_IFDISABLED))
1135 xo_emit("{l:%s} ", "disabled");
1136 #endif
1137 if ((ND.flags & ND6_IFF_PERFORMNUD))
1138 xo_emit("{l:%s} ", "nud");
1139 #ifdef ND6_IFF_ACCEPT_RTADV
1140 if ((ND.flags & ND6_IFF_ACCEPT_RTADV))
1141 xo_emit("{l:%s} ", "accept_rtadv");
1142 #endif
1143 #ifdef ND6_IFF_AUTO_LINKLOCAL
1144 if ((ND.flags & ND6_IFF_AUTO_LINKLOCAL))
1145 xo_emit("{l:%s} ", "auto_linklocal");
1146 #endif
1147 #ifdef ND6_IFF_NO_PREFER_IFACE
1148 if ((ND.flags & ND6_IFF_NO_PREFER_IFACE))
1149 xo_emit("{l:%s} ", "no_prefer_iface");
1150 #endif
1151 xo_close_list("flags");
1152 }
1153 xo_emit("\n");
1154 #undef ND
1155 xo_close_container("ifinfo");
1156
1157 close(sock);
1158 }
1159
1160 #ifndef ND_RA_FLAG_RTPREF_MASK /* XXX: just for compilation on *BSD release */
1161 #define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
1162 #endif
1163
1164 static void
rtrlist(void)1165 rtrlist(void)
1166 {
1167 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_DRLIST };
1168 char *buf;
1169 struct in6_defrouter *p, *ep;
1170 size_t l;
1171 struct timeval now;
1172
1173 if (sysctl(mib, nitems(mib), NULL, &l, NULL, 0) < 0) {
1174 xo_err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1175 /*NOTREACHED*/
1176 }
1177 if (l == 0)
1178 return;
1179 buf = malloc(l);
1180 if (!buf) {
1181 xo_err(1, "malloc");
1182 /*NOTREACHED*/
1183 }
1184 if (sysctl(mib, nitems(mib), buf, &l, NULL, 0) < 0) {
1185 xo_err(1, "sysctl(ICMPV6CTL_ND6_DRLIST)");
1186 /*NOTREACHED*/
1187 }
1188
1189 xo_open_list("router-list");
1190
1191 ep = (struct in6_defrouter *)(buf + l);
1192 for (p = (struct in6_defrouter *)buf; p < ep; p++) {
1193 int rtpref;
1194 char abuf[INET6_ADDRSTRLEN], *paddr;
1195
1196 if (getnameinfo((struct sockaddr *)&p->rtaddr,
1197 p->rtaddr.sin6_len, host_buf, sizeof(host_buf), NULL, 0,
1198 (opts.nflag ? NI_NUMERICHOST : 0)) != 0)
1199 strlcpy(host_buf, "?", sizeof(host_buf));
1200 if (opts.nflag)
1201 paddr = host_buf;
1202 else {
1203 inet_ntop(AF_INET6, &p->rtaddr.sin6_addr, abuf, sizeof(abuf));
1204 paddr = abuf;
1205 }
1206
1207 xo_open_instance("router-list");
1208 xo_emit("{:hostname/%s}{e:address/%s} if={:interface/%s}",
1209 host_buf, paddr,
1210 if_indextoname(p->if_index, ifix_buf));
1211 xo_open_list("flags_pretty");
1212 char rflags[6] = {}, *pflags = rflags;
1213 if (p->flags & ND_RA_FLAG_MANAGED) {
1214 *pflags++ = 'M';
1215 xo_emit("{el:%s}", "managed");
1216 }
1217 if (p->flags & ND_RA_FLAG_OTHER) {
1218 *pflags++ = 'O';
1219 xo_emit("{el:%s}", "other");
1220 }
1221 #ifdef DRAFT_IETF_6MAN_IPV6ONLY_FLAG
1222 if (p->flags & ND_RA_FLAG_IPV6_ONLY) {
1223 *pflags++ = 'S';
1224 xo_emit("{el:%s}", "ipv6only");
1225 }
1226 #endif
1227 xo_close_list("flags_pretty");
1228 xo_emit(", flags={:flags/%s}", rflags);
1229
1230 rtpref = ((p->flags & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff;
1231 xo_emit(", pref={:preference/%s}", rtpref_str[rtpref]);
1232
1233 gettimeofday(&now, 0);
1234 if (p->expire == 0)
1235 xo_emit(", expire=Never\n{en:permanent/true}");
1236 else
1237 xo_emit("{d:/, expire=%s\n}{e:expires_sec/%ld}",
1238 sec2str(p->expire - now.tv_sec),
1239 (long)p->expire - now.tv_sec);
1240 xo_close_instance("router-list");
1241 }
1242 free(buf);
1243 xo_close_list("router-list");
1244 }
1245
1246 static void
plist(void)1247 plist(void)
1248 {
1249 int mib[] = { CTL_NET, PF_INET6, IPPROTO_ICMPV6, ICMPV6CTL_ND6_PRLIST };
1250 char *buf;
1251 struct in6_prefix *p, *ep, *n;
1252 struct sockaddr_in6 *advrtr;
1253 size_t l;
1254 struct timeval now;
1255 const int niflags = NI_NUMERICHOST;
1256 int ninflags = opts.nflag ? NI_NUMERICHOST : 0;
1257 char namebuf[NI_MAXHOST];
1258
1259 if (sysctl(mib, nitems(mib), NULL, &l, NULL, 0) < 0) {
1260 xo_err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1261 /*NOTREACHED*/
1262 }
1263 buf = malloc(l);
1264 if (!buf) {
1265 xo_err(1, "malloc");
1266 /*NOTREACHED*/
1267 }
1268 if (sysctl(mib, nitems(mib), buf, &l, NULL, 0) < 0) {
1269 xo_err(1, "sysctl(ICMPV6CTL_ND6_PRLIST)");
1270 /*NOTREACHED*/
1271 }
1272
1273 xo_open_list("prefix-list");
1274
1275 ep = (struct in6_prefix *)(buf + l);
1276 for (p = (struct in6_prefix *)buf; p < ep; p = n) {
1277 advrtr = (struct sockaddr_in6 *)(p + 1);
1278 n = (struct in6_prefix *)&advrtr[p->advrtrs];
1279
1280 xo_open_instance("prefix-list");
1281 if (getnameinfo((struct sockaddr *)&p->prefix,
1282 p->prefix.sin6_len, namebuf, sizeof(namebuf),
1283 NULL, 0, niflags) != 0)
1284 strlcpy(namebuf, "?", sizeof(namebuf));
1285 xo_emit("{:prefix/%s%s%d} if={:interface/%s}\n", namebuf, "/",
1286 p->prefixlen, if_indextoname(p->if_index, ifix_buf));
1287
1288 gettimeofday(&now, 0);
1289 /*
1290 * meaning of fields, especially flags, is very different
1291 * by origin. notify the difference to the users.
1292 */
1293 char flags[10] = {}, *pflags = flags;
1294 xo_open_list("flags_pretty");
1295 if (p->raflags.onlink) {
1296 *pflags++ = 'L';
1297 xo_emit("{el:%s}", "ra_onlink");
1298 }
1299 if (p->raflags.autonomous) {
1300 *pflags++ = 'A';
1301 xo_emit("{el:%s}", "ra_autonomous");
1302 }
1303 if (p->flags & NDPRF_ONLINK) {
1304 *pflags++ = 'O';
1305 xo_emit("{el:%s}", "is_onlink");
1306 }
1307 if (p->flags & NDPRF_DETACHED) {
1308 *pflags++ = 'D';
1309 xo_emit("{el:%s}", "is_detached");
1310 }
1311 #ifdef NDPRF_HOME
1312 if (p->flags & NDPRF_HOME) {
1313 *pflags++ = 'H';
1314 xo_emit("{el:%s}", "is_home");
1315 }
1316 #endif
1317 xo_close_list("flags_pretty");
1318 xo_emit("flags={:flags/%s}", flags);
1319 int expire_in = p->expire - now.tv_sec;
1320
1321 if (p->vltime == ND6_INFINITE_LIFETIME)
1322 xo_emit(" vltime=infinity{e:valid-lifetime/%lu}",
1323 (unsigned long)p->vltime);
1324 else
1325 xo_emit(" vltime={:valid-lifetime/%lu}",
1326 (unsigned long)p->vltime);
1327 if (p->pltime == ND6_INFINITE_LIFETIME)
1328 xo_emit(", pltime=infinity{e:preferred-lifetime/%lu}",
1329 (unsigned long)p->pltime);
1330 else
1331 xo_emit(", pltime={:preferred-lifetime/%lu}",
1332 (unsigned long)p->pltime);
1333 if (p->expire == 0)
1334 xo_emit(", expire=Never{en:permanent/true}");
1335 else if (p->expire >= now.tv_sec)
1336 xo_emit(", expire={:expires/%s}{e:expires_sec/%d}",
1337 sec2str(expire_in), expire_in);
1338 else
1339 xo_emit(", expired{e:expires_sec/%d}", expire_in);
1340 xo_emit(", ref={:refcount/%d}", p->refcnt);
1341 xo_emit("\n");
1342 /*
1343 * "advertising router" list is meaningful only if the prefix
1344 * information is from RA.
1345 */
1346 if (p->advrtrs) {
1347 int j;
1348 struct sockaddr_in6 *sin6;
1349
1350 sin6 = advrtr;
1351 xo_emit(" advertised by\n");
1352 xo_open_list("advertising-routers");
1353 for (j = 0; j < p->advrtrs; j++) {
1354 struct in6_nbrinfo *nbi;
1355
1356 xo_open_instance("advertising-routers");
1357 if (getnameinfo((struct sockaddr *)sin6,
1358 sin6->sin6_len, namebuf, sizeof(namebuf),
1359 NULL, 0, ninflags) != 0)
1360 strlcpy(namebuf, "?", sizeof(namebuf));
1361 char abuf[INET6_ADDRSTRLEN];
1362 inet_ntop(AF_INET6, &sin6->sin6_addr, abuf,
1363 sizeof(abuf));
1364
1365 xo_emit(" {:hostname/%s}{e:address/%s}",
1366 namebuf, abuf);
1367
1368 nbi = getnbrinfo(&sin6->sin6_addr,
1369 p->if_index, 0);
1370 const char *state = "";
1371 if (nbi) {
1372 switch (nbi->state) {
1373 case ND6_LLINFO_REACHABLE:
1374 case ND6_LLINFO_STALE:
1375 case ND6_LLINFO_DELAY:
1376 case ND6_LLINFO_PROBE:
1377 state = "reachable";
1378 break;
1379 default:
1380 state = "unreachable";
1381 }
1382 } else
1383 state = "no neighbor state";
1384 xo_emit(" ({:state/%s})\n", state);
1385 sin6++;
1386 xo_close_instance("advertising-routers");
1387 }
1388 xo_close_list("advertising-routers");
1389 } else
1390 xo_emit(" No advertising router\n");
1391 xo_close_instance("prefix-list");
1392 }
1393 free(buf);
1394
1395 xo_close_list("prefix-list");
1396 }
1397
1398 static void
pfx_flush(void)1399 pfx_flush(void)
1400 {
1401 char dummyif[IFNAMSIZ+8];
1402 int sock;
1403
1404 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1405 xo_err(1, "socket");
1406 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1407 if (ioctl(sock, SIOCSPFXFLUSH_IN6, (caddr_t)&dummyif) < 0)
1408 xo_err(1, "ioctl(SIOCSPFXFLUSH_IN6)");
1409
1410 close(sock);
1411 }
1412
1413 static void
rtr_flush(void)1414 rtr_flush(void)
1415 {
1416 char dummyif[IFNAMSIZ+8];
1417 int sock;
1418
1419 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1420 xo_err(1, "socket");
1421 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1422 if (ioctl(sock, SIOCSRTRFLUSH_IN6, (caddr_t)&dummyif) < 0)
1423 xo_err(1, "ioctl(SIOCSRTRFLUSH_IN6)");
1424
1425 close(sock);
1426 }
1427
1428 static void
harmonize_rtr(void)1429 harmonize_rtr(void)
1430 {
1431 char dummyif[IFNAMSIZ+8];
1432 int sock;
1433
1434 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1435 xo_err(1, "socket");
1436 strlcpy(dummyif, "lo0", sizeof(dummyif)); /* dummy */
1437 if (ioctl(sock, SIOCSNDFLUSH_IN6, (caddr_t)&dummyif) < 0)
1438 xo_err(1, "ioctl(SIOCSNDFLUSH_IN6)");
1439
1440 close(sock);
1441 }
1442
1443 #ifdef SIOCSDEFIFACE_IN6 /* XXX: check SIOCGDEFIFACE_IN6 as well? */
1444 static void
setdefif(char * ifname)1445 setdefif(char *ifname)
1446 {
1447 struct in6_ndifreq ndifreq;
1448 unsigned int ifindex;
1449 int sock;
1450
1451 if (strcasecmp(ifname, "delete") == 0)
1452 ifindex = 0;
1453 else {
1454 if ((ifindex = if_nametoindex(ifname)) == 0)
1455 xo_err(1, "failed to resolve i/f index for %s", ifname);
1456 }
1457
1458 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1459 xo_err(1, "socket");
1460
1461 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1462 ndifreq.ifindex = ifindex;
1463
1464 if (ioctl(sock, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1465 xo_err(1, "ioctl(SIOCSDEFIFACE_IN6)");
1466
1467 close(sock);
1468 }
1469
1470 static void
getdefif(void)1471 getdefif(void)
1472 {
1473 struct in6_ndifreq ndifreq;
1474 char ifname[IFNAMSIZ+8];
1475 int sock;
1476
1477 if ((sock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
1478 xo_err(1, "socket");
1479
1480 memset(&ndifreq, 0, sizeof(ndifreq));
1481 strlcpy(ndifreq.ifname, "lo0", sizeof(ndifreq.ifname)); /* dummy */
1482
1483 if (ioctl(sock, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq) < 0)
1484 xo_err(1, "ioctl(SIOCGDEFIFACE_IN6)");
1485
1486 if (ndifreq.ifindex == 0)
1487 xo_emit("No default interface.\n");
1488 else {
1489 if ((if_indextoname(ndifreq.ifindex, ifname)) == NULL)
1490 xo_err(1, "failed to resolve ifname for index %lu",
1491 ndifreq.ifindex);
1492 xo_emit("ND default interface = {:default-interface/%s}\n", ifname);
1493 }
1494
1495 close(sock);
1496 }
1497 #endif /* SIOCSDEFIFACE_IN6 */
1498
1499 char *
sec2str(time_t total)1500 sec2str(time_t total)
1501 {
1502 static char result[256];
1503 int days, hours, mins, secs;
1504 int first = 1;
1505 char *p = result;
1506 char *ep = &result[sizeof(result)];
1507 int n;
1508
1509 days = total / 3600 / 24;
1510 hours = (total / 3600) % 24;
1511 mins = (total / 60) % 60;
1512 secs = total % 60;
1513
1514 if (days) {
1515 first = 0;
1516 n = snprintf(p, ep - p, "%dd", days);
1517 if (n < 0 || n >= ep - p)
1518 return "?";
1519 p += n;
1520 }
1521 if (!first || hours) {
1522 first = 0;
1523 n = snprintf(p, ep - p, "%dh", hours);
1524 if (n < 0 || n >= ep - p)
1525 return "?";
1526 p += n;
1527 }
1528 if (!first || mins) {
1529 first = 0;
1530 n = snprintf(p, ep - p, "%dm", mins);
1531 if (n < 0 || n >= ep - p)
1532 return "?";
1533 p += n;
1534 }
1535 snprintf(p, ep - p, "%ds", secs);
1536
1537 return(result);
1538 }
1539
1540 /*
1541 * Print the timestamp
1542 * from tcpdump/util.c
1543 */
1544 void
ts_print(const struct timeval * tvp)1545 ts_print(const struct timeval *tvp)
1546 {
1547 int sec;
1548
1549 /* Default */
1550 sec = (tvp->tv_sec + thiszone) % 86400;
1551 xo_emit("{e:tv_sec/%lld}{e:tv_usec/%lld}{d:/%02d:%02d:%02d.%06u} ",
1552 tvp->tv_sec, tvp->tv_usec,
1553 sec / 3600, (sec % 3600) / 60, sec % 60, (u_int32_t)tvp->tv_usec);
1554 }
1555
1556 #undef NEXTADDR
1557