1 /* $KAME: ifmcstat.c,v 1.48 2006/11/15 05:13:59 itojun Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (c) 2007-2009 Bruce Simpson.
7 * Copyright (C) 1995, 1996, 1997, and 1998 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 #include <sys/types.h>
36 #include <sys/param.h>
37 #include <sys/sysctl.h>
38 #include <sys/socket.h>
39 #include <sys/queue.h>
40 #include <sys/tree.h>
41
42 #include <net/if.h>
43 #include <net/if_types.h>
44 #include <net/if_dl.h>
45 #include <net/route.h>
46
47 #include <netinet/in.h>
48 #include <netinet/in_var.h>
49 #include <netinet/in_systm.h>
50 #include <netinet/ip.h>
51 #include <netinet/igmp.h>
52 #include <netinet/if_ether.h>
53 #include <netinet/igmp_var.h>
54
55 #ifdef INET6
56 #include <netinet/icmp6.h>
57 #include <netinet6/mld6_var.h>
58 #endif /* INET6 */
59
60 #include <arpa/inet.h>
61 #include <netdb.h>
62
63 #include <stddef.h>
64 #include <stdarg.h>
65 #include <stdint.h>
66 #include <stdio.h>
67 #include <stdlib.h>
68 #include <string.h>
69
70 #include <ctype.h>
71 #include <err.h>
72 #include <errno.h>
73 #include <fcntl.h>
74 #include <limits.h>
75 #include <ifaddrs.h>
76 #include <sysexits.h>
77 #include <unistd.h>
78
79 #ifdef KVM
80 /*
81 * Currently the KVM build is broken. To be fixed it requires uncovering
82 * large amount of _KERNEL code in include files, and it is also very
83 * tentative to internal kernel ABI changes. If anyone wishes to restore
84 * it, please move it out of src/usr.sbin to src/tools/tools.
85 */
86 #include <kvm.h>
87 #include <nlist.h>
88 #endif
89
90 /* XXX: This file currently assumes INET support in the base system. */
91 #ifndef INET
92 #define INET
93 #endif
94
95 extern void printb(const char *, unsigned int, const char *);
96
97 union sockunion {
98 struct sockaddr_storage ss;
99 struct sockaddr sa;
100 struct sockaddr_dl sdl;
101 #ifdef INET
102 struct sockaddr_in sin;
103 #endif
104 #ifdef INET6
105 struct sockaddr_in6 sin6;
106 #endif
107 };
108 typedef union sockunion sockunion_t;
109
110 uint32_t ifindex = 0;
111 int af = AF_UNSPEC;
112 #ifdef WITH_KVM
113 int Kflag = 0;
114 #endif
115 int vflag = 0;
116
117 #define sa_dl_equal(a1, a2) \
118 ((((struct sockaddr_dl *)(a1))->sdl_len == \
119 ((struct sockaddr_dl *)(a2))->sdl_len) && \
120 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \
121 LLADDR((struct sockaddr_dl *)(a2)), \
122 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0))
123
124 /*
125 * Most of the code in this utility is to support the use of KVM for
126 * post-mortem debugging of the multicast code.
127 */
128 #ifdef WITH_KVM
129
130 #ifdef INET
131 static void if_addrlist(struct ifaddr *);
132 static struct in_multi *
133 in_multientry(struct in_multi *);
134 #endif /* INET */
135
136 #ifdef INET6
137 static void if6_addrlist(struct ifaddr *);
138 static struct in6_multi *
139 in6_multientry(struct in6_multi *);
140 #endif /* INET6 */
141
142 static void kread(u_long, void *, int);
143 static void ll_addrlist(struct ifaddr *);
144
145 static int ifmcstat_kvm(const char *kernel, const char *core);
146
147 #define KREAD(addr, buf, type) \
148 kread((u_long)addr, (void *)buf, sizeof(type))
149
150 kvm_t *kvmd;
151 struct nlist nl[] = {
152 { "_ifnet", 0, 0, 0, 0, },
153 { "", 0, 0, 0, 0, },
154 };
155 #define N_IFNET 0
156
157 #endif /* WITH_KVM */
158
159 static int ifmcstat_getifmaddrs(void);
160 #ifdef INET
161 static void in_ifinfo(struct igmp_ifinfo *);
162 static const char * inm_mode(u_int mode);
163 #endif
164 #ifdef INET6
165 static void in6_ifinfo(struct mld_ifinfo *);
166 static const char * inet6_n2a(struct in6_addr *, uint32_t);
167 #endif
168 int main(int, char **);
169
170 static void
usage()171 usage()
172 {
173
174 fprintf(stderr,
175 "usage: ifmcstat [-i interface] [-f address family]"
176 " [-v]"
177 #ifdef WITH_KVM
178 " [-K] [-M core] [-N system]"
179 #endif
180 "\n");
181 exit(EX_USAGE);
182 }
183
184 static const char *options = "i:f:vM:N:"
185 #ifdef WITH_KVM
186 "K"
187 #endif
188 ;
189
190 int
main(int argc,char ** argv)191 main(int argc, char **argv)
192 {
193 int c, error;
194 #ifdef WITH_KVM
195 const char *kernel = NULL;
196 const char *core = NULL;
197 #endif
198
199 while ((c = getopt(argc, argv, options)) != -1) {
200 switch (c) {
201 case 'i':
202 if ((ifindex = if_nametoindex(optarg)) == 0) {
203 fprintf(stderr, "%s: unknown interface\n",
204 optarg);
205 exit(EX_NOHOST);
206 }
207 break;
208
209 case 'f':
210 #ifdef INET
211 if (strcmp(optarg, "inet") == 0) {
212 af = AF_INET;
213 break;
214 }
215 #endif
216 #ifdef INET6
217 if (strcmp(optarg, "inet6") == 0) {
218 af = AF_INET6;
219 break;
220 }
221 #endif
222 if (strcmp(optarg, "link") == 0) {
223 af = AF_LINK;
224 break;
225 }
226 fprintf(stderr, "%s: unknown address family\n", optarg);
227 exit(EX_USAGE);
228 /*NOTREACHED*/
229 break;
230
231 #ifdef WITH_KVM
232 case 'K':
233 ++Kflag;
234 break;
235 #endif
236
237 case 'v':
238 ++vflag;
239 break;
240
241 #ifdef WITH_KVM
242 case 'M':
243 core = strdup(optarg);
244 break;
245
246 case 'N':
247 kernel = strdup(optarg);
248 break;
249 #endif
250
251 default:
252 usage();
253 break;
254 /*NOTREACHED*/
255 }
256 }
257
258 if (af == AF_LINK && vflag)
259 usage();
260
261 #ifdef WITH_KVM
262 if (Kflag)
263 error = ifmcstat_kvm(kernel, core);
264 /*
265 * If KVM failed, and user did not explicitly specify a core file,
266 * or force KVM backend to be disabled, try the sysctl backend.
267 */
268 if (!Kflag || (error != 0 && (core == NULL && kernel == NULL)))
269 #endif
270 error = ifmcstat_getifmaddrs();
271 if (error != 0)
272 exit(EX_OSERR);
273
274 exit(EX_OK);
275 /*NOTREACHED*/
276 }
277
278 #ifdef INET
279
280 static void
in_ifinfo(struct igmp_ifinfo * igi)281 in_ifinfo(struct igmp_ifinfo *igi)
282 {
283
284 printf("\t");
285 switch (igi->igi_version) {
286 case IGMP_VERSION_1:
287 case IGMP_VERSION_2:
288 case IGMP_VERSION_3:
289 printf("igmpv%d", igi->igi_version);
290 break;
291 default:
292 printf("igmpv?(%d)", igi->igi_version);
293 break;
294 }
295 if (igi->igi_flags)
296 printb(" flags", igi->igi_flags, "\020\1SILENT\2LOOPBACK");
297 if (igi->igi_version == IGMP_VERSION_3) {
298 printf(" rv %u qi %u qri %u uri %u",
299 igi->igi_rv, igi->igi_qi, igi->igi_qri, igi->igi_uri);
300 }
301 if (vflag >= 2) {
302 printf(" v1timer %u v2timer %u v3timer %u",
303 igi->igi_v1_timer, igi->igi_v2_timer, igi->igi_v3_timer);
304 }
305 printf("\n");
306 }
307
308 static const char *inm_modes[] = {
309 "undefined",
310 "include",
311 "exclude",
312 };
313
314 static const char *
inm_mode(u_int mode)315 inm_mode(u_int mode)
316 {
317
318 if (mode >= MCAST_UNDEFINED && mode <= MCAST_EXCLUDE)
319 return (inm_modes[mode]);
320 return (NULL);
321 }
322
323 #endif /* INET */
324
325 #ifdef WITH_KVM
326
327 static int
ifmcstat_kvm(const char * kernel,const char * core)328 ifmcstat_kvm(const char *kernel, const char *core)
329 {
330 char buf[_POSIX2_LINE_MAX], ifname[IFNAMSIZ];
331 struct ifnet *ifp, *nifp, ifnet;
332
333 if ((kvmd = kvm_openfiles(kernel, core, NULL, O_RDONLY, buf)) ==
334 NULL) {
335 perror("kvm_openfiles");
336 return (-1);
337 }
338 if (kvm_nlist(kvmd, nl) < 0) {
339 perror("kvm_nlist");
340 return (-1);
341 }
342 if (nl[N_IFNET].n_value == 0) {
343 printf("symbol %s not found\n", nl[N_IFNET].n_name);
344 return (-1);
345 }
346 KREAD(nl[N_IFNET].n_value, &ifp, struct ifnet *);
347 while (ifp) {
348 KREAD(ifp, &ifnet, struct ifnet);
349 nifp = ifnet.if_link.tqe_next;
350 if (ifindex && ifindex != ifnet.if_index)
351 goto next;
352
353 printf("%s:\n", if_indextoname(ifnet.if_index, ifname));
354 #ifdef INET
355 if_addrlist(TAILQ_FIRST(&ifnet.if_addrhead));
356 #endif
357 #ifdef INET6
358 if6_addrlist(TAILQ_FIRST(&ifnet.if_addrhead));
359 #endif
360 if (vflag)
361 ll_addrlist(TAILQ_FIRST(&ifnet.if_addrhead));
362 next:
363 ifp = nifp;
364 }
365
366 return (0);
367 }
368
369 static void
kread(u_long addr,void * buf,int len)370 kread(u_long addr, void *buf, int len)
371 {
372
373 if (kvm_read(kvmd, addr, buf, len) != len) {
374 perror("kvm_read");
375 exit(EX_OSERR);
376 }
377 }
378
379 static void
ll_addrlist(struct ifaddr * ifap)380 ll_addrlist(struct ifaddr *ifap)
381 {
382 char addrbuf[NI_MAXHOST];
383 struct ifaddr ifa;
384 struct sockaddr sa;
385 struct sockaddr_dl sdl;
386 struct ifaddr *ifap0;
387
388 if (af && af != AF_LINK)
389 return;
390
391 ifap0 = ifap;
392 while (ifap) {
393 KREAD(ifap, &ifa, struct ifaddr);
394 if (ifa.ifa_addr == NULL)
395 goto nextifap;
396 KREAD(ifa.ifa_addr, &sa, struct sockaddr);
397 if (sa.sa_family != PF_LINK)
398 goto nextifap;
399 KREAD(ifa.ifa_addr, &sdl, struct sockaddr_dl);
400 if (sdl.sdl_alen == 0)
401 goto nextifap;
402 addrbuf[0] = '\0';
403 getnameinfo((struct sockaddr *)&sdl, sdl.sdl_len,
404 addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST);
405 printf("\tlink %s\n", addrbuf);
406 nextifap:
407 ifap = ifa.ifa_link.tqe_next;
408 }
409 if (ifap0) {
410 struct ifnet ifnet;
411 struct ifmultiaddr ifm, *ifmp = 0;
412
413 KREAD(ifap0, &ifa, struct ifaddr);
414 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
415 if (TAILQ_FIRST(&ifnet.if_multiaddrs))
416 ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs);
417 while (ifmp) {
418 KREAD(ifmp, &ifm, struct ifmultiaddr);
419 if (ifm.ifma_addr == NULL)
420 goto nextmulti;
421 KREAD(ifm.ifma_addr, &sa, struct sockaddr);
422 if (sa.sa_family != AF_LINK)
423 goto nextmulti;
424 KREAD(ifm.ifma_addr, &sdl, struct sockaddr_dl);
425 addrbuf[0] = '\0';
426 getnameinfo((struct sockaddr *)&sdl,
427 sdl.sdl_len, addrbuf, sizeof(addrbuf),
428 NULL, 0, NI_NUMERICHOST);
429 printf("\t\tgroup %s refcnt %d\n",
430 addrbuf, ifm.ifma_refcount);
431 nextmulti:
432 ifmp = TAILQ_NEXT(&ifm, ifma_link);
433 }
434 }
435 }
436
437 #ifdef INET6
438
439 static void
if6_addrlist(struct ifaddr * ifap)440 if6_addrlist(struct ifaddr *ifap)
441 {
442 struct ifnet ifnet;
443 struct ifaddr ifa;
444 struct sockaddr sa;
445 struct in6_ifaddr if6a;
446 struct ifaddr *ifap0;
447
448 if (af && af != AF_INET6)
449 return;
450 ifap0 = ifap;
451 while (ifap) {
452 KREAD(ifap, &ifa, struct ifaddr);
453 if (ifa.ifa_addr == NULL)
454 goto nextifap;
455 KREAD(ifa.ifa_addr, &sa, struct sockaddr);
456 if (sa.sa_family != PF_INET6)
457 goto nextifap;
458 KREAD(ifap, &if6a, struct in6_ifaddr);
459 printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr,
460 if6a.ia_addr.sin6_scope_id));
461 /*
462 * Print per-link MLD information, if available.
463 */
464 if (ifa.ifa_ifp != NULL) {
465 struct in6_ifextra ie;
466 struct mld_ifinfo mli;
467
468 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
469 KREAD(ifnet.if_afdata[AF_INET6], &ie,
470 struct in6_ifextra);
471 if (ie.mld_ifinfo != NULL) {
472 KREAD(ie.mld_ifinfo, &mli, struct mld_ifinfo);
473 in6_ifinfo(&mli);
474 }
475 }
476 nextifap:
477 ifap = ifa.ifa_link.tqe_next;
478 }
479 if (ifap0) {
480 struct ifnet ifnet;
481 struct ifmultiaddr ifm, *ifmp = 0;
482 struct sockaddr_dl sdl;
483
484 KREAD(ifap0, &ifa, struct ifaddr);
485 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
486 if (TAILQ_FIRST(&ifnet.if_multiaddrs))
487 ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs);
488 while (ifmp) {
489 KREAD(ifmp, &ifm, struct ifmultiaddr);
490 if (ifm.ifma_addr == NULL)
491 goto nextmulti;
492 KREAD(ifm.ifma_addr, &sa, struct sockaddr);
493 if (sa.sa_family != AF_INET6)
494 goto nextmulti;
495 (void)in6_multientry((struct in6_multi *)
496 ifm.ifma_protospec);
497 if (ifm.ifma_lladdr == 0)
498 goto nextmulti;
499 KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl);
500 printf("\t\t\tmcast-macaddr %s refcnt %d\n",
501 ether_ntoa((struct ether_addr *)LLADDR(&sdl)),
502 ifm.ifma_refcount);
503 nextmulti:
504 ifmp = TAILQ_NEXT(&ifm, ifma_link);
505 }
506 }
507 }
508
509 static struct in6_multi *
in6_multientry(struct in6_multi * mc)510 in6_multientry(struct in6_multi *mc)
511 {
512 struct in6_multi multi;
513
514 KREAD(mc, &multi, struct in6_multi);
515 printf("\t\tgroup %s", inet6_n2a(&multi.in6m_addr, 0));
516 printf(" refcnt %u\n", multi.in6m_refcount);
517
518 return (multi.in6m_entry.le_next);
519 }
520
521 #endif /* INET6 */
522
523 #ifdef INET
524
525 static void
if_addrlist(struct ifaddr * ifap)526 if_addrlist(struct ifaddr *ifap)
527 {
528 struct ifaddr ifa;
529 struct ifnet ifnet;
530 struct sockaddr sa;
531 struct in_ifaddr ia;
532 struct ifaddr *ifap0;
533
534 if (af && af != AF_INET)
535 return;
536 ifap0 = ifap;
537 while (ifap) {
538 KREAD(ifap, &ifa, struct ifaddr);
539 if (ifa.ifa_addr == NULL)
540 goto nextifap;
541 KREAD(ifa.ifa_addr, &sa, struct sockaddr);
542 if (sa.sa_family != PF_INET)
543 goto nextifap;
544 KREAD(ifap, &ia, struct in_ifaddr);
545 printf("\tinet %s\n", inet_ntoa(ia.ia_addr.sin_addr));
546 /*
547 * Print per-link IGMP information, if available.
548 */
549 if (ifa.ifa_ifp != NULL) {
550 struct in_ifinfo ii;
551 struct igmp_ifinfo igi;
552
553 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
554 KREAD(ifnet.if_afdata[AF_INET], &ii, struct in_ifinfo);
555 if (ii.ii_igmp != NULL) {
556 KREAD(ii.ii_igmp, &igi, struct igmp_ifinfo);
557 in_ifinfo(&igi);
558 }
559 }
560 nextifap:
561 ifap = ifa.ifa_link.tqe_next;
562 }
563 if (ifap0) {
564 struct ifmultiaddr ifm, *ifmp = 0;
565 struct sockaddr_dl sdl;
566
567 KREAD(ifap0, &ifa, struct ifaddr);
568 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
569 if (TAILQ_FIRST(&ifnet.if_multiaddrs))
570 ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs);
571 while (ifmp) {
572 KREAD(ifmp, &ifm, struct ifmultiaddr);
573 if (ifm.ifma_addr == NULL)
574 goto nextmulti;
575 KREAD(ifm.ifma_addr, &sa, struct sockaddr);
576 if (sa.sa_family != AF_INET)
577 goto nextmulti;
578 (void)in_multientry((struct in_multi *)
579 ifm.ifma_protospec);
580 if (ifm.ifma_lladdr == 0)
581 goto nextmulti;
582 KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl);
583 printf("\t\t\tmcast-macaddr %s refcnt %d\n",
584 ether_ntoa((struct ether_addr *)LLADDR(&sdl)),
585 ifm.ifma_refcount);
586 nextmulti:
587 ifmp = TAILQ_NEXT(&ifm, ifma_link);
588 }
589 }
590 }
591
592 static const char *inm_states[] = {
593 "not-member",
594 "silent",
595 "idle",
596 "lazy",
597 "sleeping",
598 "awakening",
599 "query-pending",
600 "sg-query-pending",
601 "leaving"
602 };
603
604 static const char *
inm_state(u_int state)605 inm_state(u_int state)
606 {
607
608 if (state >= IGMP_NOT_MEMBER && state <= IGMP_LEAVING_MEMBER)
609 return (inm_states[state]);
610 return (NULL);
611 }
612
613 #if 0
614 static struct ip_msource *
615 ims_min_kvm(struct in_multi *pinm)
616 {
617 struct ip_msource ims0;
618 struct ip_msource *tmp, *parent;
619
620 parent = NULL;
621 tmp = RB_ROOT(&pinm->inm_srcs);
622 while (tmp) {
623 parent = tmp;
624 KREAD(tmp, &ims0, struct ip_msource);
625 tmp = RB_LEFT(&ims0, ims_link);
626 }
627 return (parent); /* kva */
628 }
629
630 /* XXX This routine is buggy. See RB_NEXT in sys/tree.h. */
631 static struct ip_msource *
632 ims_next_kvm(struct ip_msource *ims)
633 {
634 struct ip_msource ims0, ims1;
635 struct ip_msource *tmp;
636
637 KREAD(ims, &ims0, struct ip_msource);
638 if (RB_RIGHT(&ims0, ims_link)) {
639 ims = RB_RIGHT(&ims0, ims_link);
640 KREAD(ims, &ims1, struct ip_msource);
641 while ((tmp = RB_LEFT(&ims1, ims_link))) {
642 KREAD(tmp, &ims0, struct ip_msource);
643 ims = RB_LEFT(&ims0, ims_link);
644 }
645 } else {
646 tmp = RB_PARENT(&ims0, ims_link);
647 if (tmp) {
648 KREAD(tmp, &ims1, struct ip_msource);
649 if (ims == RB_LEFT(&ims1, ims_link))
650 ims = tmp;
651 } else {
652 while ((tmp = RB_PARENT(&ims0, ims_link))) {
653 KREAD(tmp, &ims1, struct ip_msource);
654 if (ims == RB_RIGHT(&ims1, ims_link)) {
655 ims = tmp;
656 KREAD(ims, &ims0, struct ip_msource);
657 } else
658 break;
659 }
660 ims = RB_PARENT(&ims0, ims_link);
661 }
662 }
663 return (ims); /* kva */
664 }
665
666 static void
667 inm_print_sources_kvm(struct in_multi *pinm)
668 {
669 struct ip_msource ims0;
670 struct ip_msource *ims;
671 struct in_addr src;
672 int cnt;
673 uint8_t fmode;
674
675 cnt = 0;
676 fmode = pinm->inm_st[1].iss_fmode;
677 if (fmode == MCAST_UNDEFINED)
678 return;
679 for (ims = ims_min_kvm(pinm); ims != NULL; ims = ims_next_kvm(ims)) {
680 if (cnt == 0)
681 printf(" srcs ");
682 KREAD(ims, &ims0, struct ip_msource);
683 /* Only print sources in-mode at t1. */
684 if (fmode != ims_get_mode(pinm, ims, 1))
685 continue;
686 src.s_addr = htonl(ims0.ims_haddr);
687 printf("%s%s", (cnt++ == 0 ? "" : ","), inet_ntoa(src));
688 }
689 }
690 #endif
691
692 static struct in_multi *
in_multientry(struct in_multi * pinm)693 in_multientry(struct in_multi *pinm)
694 {
695 struct in_multi inm;
696 const char *state, *mode;
697
698 KREAD(pinm, &inm, struct in_multi);
699 printf("\t\tgroup %s", inet_ntoa(inm.inm_addr));
700 printf(" refcnt %u", inm.inm_refcount);
701
702 state = inm_state(inm.inm_state);
703 if (state)
704 printf(" state %s", state);
705 else
706 printf(" state (%d)", inm.inm_state);
707
708 mode = inm_mode(inm.inm_st[1].iss_fmode);
709 if (mode)
710 printf(" mode %s", mode);
711 else
712 printf(" mode (%d)", inm.inm_st[1].iss_fmode);
713
714 if (vflag >= 2) {
715 printf(" asm %u ex %u in %u rec %u",
716 (u_int)inm.inm_st[1].iss_asm,
717 (u_int)inm.inm_st[1].iss_ex,
718 (u_int)inm.inm_st[1].iss_in,
719 (u_int)inm.inm_st[1].iss_rec);
720 }
721
722 #if 0
723 /* Buggy. */
724 if (vflag)
725 inm_print_sources_kvm(&inm);
726 #endif
727
728 printf("\n");
729 return (NULL);
730 }
731
732 #endif /* INET */
733
734 #endif /* WITH_KVM */
735
736 #ifdef INET6
737
738 static void
in6_ifinfo(struct mld_ifinfo * mli)739 in6_ifinfo(struct mld_ifinfo *mli)
740 {
741
742 printf("\t");
743 switch (mli->mli_version) {
744 case MLD_VERSION_1:
745 case MLD_VERSION_2:
746 printf("mldv%d", mli->mli_version);
747 break;
748 default:
749 printf("mldv?(%d)", mli->mli_version);
750 break;
751 }
752 if (mli->mli_flags)
753 printb(" flags", mli->mli_flags, "\020\1SILENT\2USEALLOW");
754 if (mli->mli_version == MLD_VERSION_2) {
755 printf(" rv %u qi %u qri %u uri %u",
756 mli->mli_rv, mli->mli_qi, mli->mli_qri, mli->mli_uri);
757 }
758 if (vflag >= 2) {
759 printf(" v1timer %u v2timer %u", mli->mli_v1_timer,
760 mli->mli_v2_timer);
761 }
762 printf("\n");
763 }
764
765 static const char *
inet6_n2a(struct in6_addr * p,uint32_t scope_id)766 inet6_n2a(struct in6_addr *p, uint32_t scope_id)
767 {
768 static char buf[NI_MAXHOST];
769 struct sockaddr_in6 sin6;
770 const int niflags = NI_NUMERICHOST;
771
772 memset(&sin6, 0, sizeof(sin6));
773 sin6.sin6_family = AF_INET6;
774 sin6.sin6_len = sizeof(struct sockaddr_in6);
775 sin6.sin6_addr = *p;
776 sin6.sin6_scope_id = scope_id;
777 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
778 buf, sizeof(buf), NULL, 0, niflags) == 0) {
779 return (buf);
780 } else {
781 return ("(invalid)");
782 }
783 }
784 #endif /* INET6 */
785
786 #ifdef INET
787 /*
788 * Retrieve per-group source filter mode and lists via sysctl.
789 */
790 static void
inm_print_sources_sysctl(uint32_t ifindex,struct in_addr gina)791 inm_print_sources_sysctl(uint32_t ifindex, struct in_addr gina)
792 {
793 #define MAX_SYSCTL_TRY 5
794 int mib[7];
795 int ntry = 0;
796 size_t mibsize;
797 size_t len;
798 size_t needed;
799 size_t cnt;
800 int i;
801 char *buf;
802 struct in_addr *pina;
803 uint32_t *p;
804 uint32_t fmode;
805 const char *modestr;
806
807 mibsize = nitems(mib);
808 if (sysctlnametomib("net.inet.ip.mcast.filters", mib, &mibsize) == -1) {
809 perror("sysctlnametomib");
810 return;
811 }
812
813 needed = 0;
814 mib[5] = ifindex;
815 mib[6] = gina.s_addr; /* 32 bits wide */
816 mibsize = nitems(mib);
817 do {
818 if (sysctl(mib, mibsize, NULL, &needed, NULL, 0) == -1) {
819 perror("sysctl net.inet.ip.mcast.filters");
820 return;
821 }
822 if ((buf = malloc(needed)) == NULL) {
823 perror("malloc");
824 return;
825 }
826 if (sysctl(mib, mibsize, buf, &needed, NULL, 0) == -1) {
827 if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) {
828 perror("sysctl");
829 goto out_free;
830 }
831 free(buf);
832 buf = NULL;
833 }
834 } while (buf == NULL);
835
836 len = needed;
837 if (len < sizeof(uint32_t)) {
838 perror("sysctl");
839 goto out_free;
840 }
841
842 p = (uint32_t *)buf;
843 fmode = *p++;
844 len -= sizeof(uint32_t);
845
846 modestr = inm_mode(fmode);
847 if (modestr)
848 printf(" mode %s", modestr);
849 else
850 printf(" mode (%u)", fmode);
851
852 if (vflag == 0)
853 goto out_free;
854
855 cnt = len / sizeof(struct in_addr);
856 pina = (struct in_addr *)p;
857
858 for (i = 0; i < cnt; i++) {
859 if (i == 0)
860 printf(" srcs ");
861 fprintf(stdout, "%s%s", (i == 0 ? "" : ","),
862 inet_ntoa(*pina++));
863 len -= sizeof(struct in_addr);
864 }
865 if (len > 0) {
866 fprintf(stderr, "warning: %u trailing bytes from %s\n",
867 (unsigned int)len, "net.inet.ip.mcast.filters");
868 }
869
870 out_free:
871 free(buf);
872 #undef MAX_SYSCTL_TRY
873 }
874
875 #endif /* INET */
876
877 #ifdef INET6
878 /*
879 * Retrieve MLD per-group source filter mode and lists via sysctl.
880 *
881 * Note: The 128-bit IPv6 group address needs to be segmented into
882 * 32-bit pieces for marshaling to sysctl. So the MIB name ends
883 * up looking like this:
884 * a.b.c.d.e.ifindex.g[0].g[1].g[2].g[3]
885 * Assumes that pgroup originated from the kernel, so its components
886 * are already in network-byte order.
887 */
888 static void
in6m_print_sources_sysctl(uint32_t ifindex,struct in6_addr * pgroup)889 in6m_print_sources_sysctl(uint32_t ifindex, struct in6_addr *pgroup)
890 {
891 #define MAX_SYSCTL_TRY 5
892 char addrbuf[INET6_ADDRSTRLEN];
893 int mib[10];
894 int ntry = 0;
895 int *pi;
896 size_t mibsize;
897 size_t len;
898 size_t needed;
899 size_t cnt;
900 int i;
901 char *buf;
902 struct in6_addr *pina;
903 uint32_t *p;
904 uint32_t fmode;
905 const char *modestr;
906
907 mibsize = nitems(mib);
908 if (sysctlnametomib("net.inet6.ip6.mcast.filters", mib,
909 &mibsize) == -1) {
910 perror("sysctlnametomib");
911 return;
912 }
913
914 needed = 0;
915 mib[5] = ifindex;
916 pi = (int *)pgroup;
917 for (i = 0; i < 4; i++)
918 mib[6 + i] = *pi++;
919
920 mibsize = nitems(mib);
921 do {
922 if (sysctl(mib, mibsize, NULL, &needed, NULL, 0) == -1) {
923 perror("sysctl net.inet6.ip6.mcast.filters");
924 return;
925 }
926 if ((buf = malloc(needed)) == NULL) {
927 perror("malloc");
928 return;
929 }
930 if (sysctl(mib, mibsize, buf, &needed, NULL, 0) == -1) {
931 if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) {
932 perror("sysctl");
933 goto out_free;
934 }
935 free(buf);
936 buf = NULL;
937 }
938 } while (buf == NULL);
939
940 len = needed;
941 if (len < sizeof(uint32_t)) {
942 perror("sysctl");
943 goto out_free;
944 }
945
946 p = (uint32_t *)buf;
947 fmode = *p++;
948 len -= sizeof(uint32_t);
949
950 modestr = inm_mode(fmode);
951 if (modestr)
952 printf(" mode %s", modestr);
953 else
954 printf(" mode (%u)", fmode);
955
956 if (vflag == 0)
957 goto out_free;
958
959 cnt = len / sizeof(struct in6_addr);
960 pina = (struct in6_addr *)p;
961
962 for (i = 0; i < cnt; i++) {
963 if (i == 0)
964 printf(" srcs ");
965 inet_ntop(AF_INET6, (const char *)pina++, addrbuf,
966 INET6_ADDRSTRLEN);
967 fprintf(stdout, "%s%s", (i == 0 ? "" : ","), addrbuf);
968 len -= sizeof(struct in6_addr);
969 }
970 if (len > 0) {
971 fprintf(stderr, "warning: %u trailing bytes from %s\n",
972 (unsigned int)len, "net.inet6.ip6.mcast.filters");
973 }
974
975 out_free:
976 free(buf);
977 #undef MAX_SYSCTL_TRY
978 }
979 #endif /* INET6 */
980
981 static int
ifmcstat_getifmaddrs(void)982 ifmcstat_getifmaddrs(void)
983 {
984 char thisifname[IFNAMSIZ];
985 char addrbuf[NI_MAXHOST];
986 struct ifaddrs *ifap, *ifa;
987 struct ifmaddrs *ifmap, *ifma;
988 sockunion_t lastifasa;
989 sockunion_t *psa, *pgsa, *pllsa, *pifasa;
990 char *pcolon;
991 char *pafname;
992 uint32_t lastifindex, thisifindex;
993 int error;
994
995 error = 0;
996 ifap = NULL;
997 ifmap = NULL;
998 lastifindex = 0;
999 thisifindex = 0;
1000 lastifasa.ss.ss_family = AF_UNSPEC;
1001
1002 if (getifaddrs(&ifap) != 0) {
1003 warn("getifmaddrs");
1004 return (-1);
1005 }
1006
1007 if (getifmaddrs(&ifmap) != 0) {
1008 warn("getifmaddrs");
1009 error = -1;
1010 goto out;
1011 }
1012
1013 for (ifma = ifmap; ifma; ifma = ifma->ifma_next) {
1014 error = 0;
1015 if (ifma->ifma_name == NULL || ifma->ifma_addr == NULL)
1016 continue;
1017
1018 psa = (sockunion_t *)ifma->ifma_name;
1019 if (psa->sa.sa_family != AF_LINK) {
1020 fprintf(stderr,
1021 "WARNING: Kernel returned invalid data.\n");
1022 error = -1;
1023 break;
1024 }
1025
1026 /* Filter on interface name. */
1027 thisifindex = psa->sdl.sdl_index;
1028 if (ifindex != 0 && thisifindex != ifindex)
1029 continue;
1030
1031 /* Filter on address family. */
1032 pgsa = (sockunion_t *)ifma->ifma_addr;
1033 if (af != 0 && pgsa->sa.sa_family != af)
1034 continue;
1035
1036 strlcpy(thisifname, link_ntoa(&psa->sdl), IFNAMSIZ);
1037 pcolon = strchr(thisifname, ':');
1038 if (pcolon)
1039 *pcolon = '\0';
1040
1041 /* Only print the banner for the first ifmaddrs entry. */
1042 if (lastifindex == 0 || lastifindex != thisifindex) {
1043 lastifindex = thisifindex;
1044 fprintf(stdout, "%s:\n", thisifname);
1045 }
1046
1047 /*
1048 * Currently, multicast joins only take place on the
1049 * primary IPv4 address, and only on the link-local IPv6
1050 * address, as per IGMPv2/3 and MLDv1/2 semantics.
1051 * Therefore, we only look up the primary address on
1052 * the first pass.
1053 */
1054 pifasa = NULL;
1055 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1056 if ((strcmp(ifa->ifa_name, thisifname) != 0) ||
1057 (ifa->ifa_addr == NULL) ||
1058 (ifa->ifa_addr->sa_family != pgsa->sa.sa_family))
1059 continue;
1060 /*
1061 * For AF_INET6 only the link-local address should
1062 * be returned. If built without IPv6 support,
1063 * skip this address entirely.
1064 */
1065 pifasa = (sockunion_t *)ifa->ifa_addr;
1066 if (pifasa->sa.sa_family == AF_INET6
1067 #ifdef INET6
1068 && !IN6_IS_ADDR_LINKLOCAL(&pifasa->sin6.sin6_addr)
1069 #endif
1070 ) {
1071 pifasa = NULL;
1072 continue;
1073 }
1074 break;
1075 }
1076 if (pifasa == NULL)
1077 continue; /* primary address not found */
1078
1079 if (!vflag && pifasa->sa.sa_family == AF_LINK)
1080 continue;
1081
1082 /* Parse and print primary address, if not already printed. */
1083 if (lastifasa.ss.ss_family == AF_UNSPEC ||
1084 ((lastifasa.ss.ss_family == AF_LINK &&
1085 !sa_dl_equal(&lastifasa.sa, &pifasa->sa)) ||
1086 !sa_equal(&lastifasa.sa, &pifasa->sa))) {
1087
1088 switch (pifasa->sa.sa_family) {
1089 case AF_INET:
1090 pafname = "inet";
1091 break;
1092 case AF_INET6:
1093 pafname = "inet6";
1094 break;
1095 case AF_LINK:
1096 pafname = "link";
1097 break;
1098 default:
1099 pafname = "unknown";
1100 break;
1101 }
1102
1103 switch (pifasa->sa.sa_family) {
1104 case AF_INET6:
1105 #ifdef INET6
1106 {
1107 const char *p =
1108 inet6_n2a(&pifasa->sin6.sin6_addr,
1109 pifasa->sin6.sin6_scope_id);
1110 strlcpy(addrbuf, p, sizeof(addrbuf));
1111 break;
1112 }
1113 #else
1114 /* FALLTHROUGH */
1115 #endif
1116 case AF_INET:
1117 case AF_LINK:
1118 error = getnameinfo(&pifasa->sa,
1119 pifasa->sa.sa_len,
1120 addrbuf, sizeof(addrbuf), NULL, 0,
1121 NI_NUMERICHOST);
1122 if (error)
1123 perror("getnameinfo");
1124 break;
1125 default:
1126 addrbuf[0] = '\0';
1127 break;
1128 }
1129
1130 fprintf(stdout, "\t%s %s", pafname, addrbuf);
1131 #ifdef INET6
1132 if (pifasa->sa.sa_family == AF_INET6 &&
1133 pifasa->sin6.sin6_scope_id)
1134 fprintf(stdout, " scopeid 0x%x",
1135 pifasa->sin6.sin6_scope_id);
1136 #endif
1137 fprintf(stdout, "\n");
1138 #ifdef INET
1139 /*
1140 * Print per-link IGMP information, if available.
1141 */
1142 if (pifasa->sa.sa_family == AF_INET) {
1143 struct igmp_ifinfo igi;
1144 size_t mibsize, len;
1145 int mib[5];
1146
1147 mibsize = nitems(mib);
1148 if (sysctlnametomib("net.inet.igmp.ifinfo",
1149 mib, &mibsize) == -1) {
1150 perror("sysctlnametomib");
1151 goto next_ifnet;
1152 }
1153 mib[mibsize] = thisifindex;
1154 len = sizeof(struct igmp_ifinfo);
1155 if (sysctl(mib, mibsize + 1, &igi, &len, NULL,
1156 0) == -1) {
1157 perror("sysctl net.inet.igmp.ifinfo");
1158 goto next_ifnet;
1159 }
1160 in_ifinfo(&igi);
1161 }
1162 #endif /* INET */
1163 #ifdef INET6
1164 /*
1165 * Print per-link MLD information, if available.
1166 */
1167 if (pifasa->sa.sa_family == AF_INET6) {
1168 struct mld_ifinfo mli;
1169 size_t mibsize, len;
1170 int mib[5];
1171
1172 mibsize = nitems(mib);
1173 if (sysctlnametomib("net.inet6.mld.ifinfo",
1174 mib, &mibsize) == -1) {
1175 perror("sysctlnametomib");
1176 goto next_ifnet;
1177 }
1178 mib[mibsize] = thisifindex;
1179 len = sizeof(struct mld_ifinfo);
1180 if (sysctl(mib, mibsize + 1, &mli, &len, NULL,
1181 0) == -1) {
1182 perror("sysctl net.inet6.mld.ifinfo");
1183 goto next_ifnet;
1184 }
1185 in6_ifinfo(&mli);
1186 }
1187 #endif /* INET6 */
1188 #if defined(INET) || defined(INET6)
1189 next_ifnet:
1190 #endif
1191 lastifasa = *pifasa;
1192 }
1193
1194 /* Print this group address. */
1195 #ifdef INET6
1196 if (pgsa->sa.sa_family == AF_INET6) {
1197 const char *p = inet6_n2a(&pgsa->sin6.sin6_addr,
1198 pgsa->sin6.sin6_scope_id);
1199 strlcpy(addrbuf, p, sizeof(addrbuf));
1200 } else
1201 #endif
1202 {
1203 error = getnameinfo(&pgsa->sa, pgsa->sa.sa_len,
1204 addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST);
1205 if (error)
1206 perror("getnameinfo");
1207 }
1208
1209 fprintf(stdout, "\t\tgroup %s", addrbuf);
1210 #ifdef INET6
1211 if (pgsa->sa.sa_family == AF_INET6 &&
1212 pgsa->sin6.sin6_scope_id)
1213 fprintf(stdout, " scopeid 0x%x",
1214 pgsa->sin6.sin6_scope_id);
1215 #endif
1216 #ifdef INET
1217 if (pgsa->sa.sa_family == AF_INET) {
1218 inm_print_sources_sysctl(thisifindex,
1219 pgsa->sin.sin_addr);
1220 }
1221 #endif
1222 #ifdef INET6
1223 if (pgsa->sa.sa_family == AF_INET6) {
1224 in6m_print_sources_sysctl(thisifindex,
1225 &pgsa->sin6.sin6_addr);
1226 }
1227 #endif
1228 fprintf(stdout, "\n");
1229
1230 /* Link-layer mapping, if present. */
1231 pllsa = (sockunion_t *)ifma->ifma_lladdr;
1232 if (pllsa != NULL) {
1233 error = getnameinfo(&pllsa->sa, pllsa->sa.sa_len,
1234 addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST);
1235 fprintf(stdout, "\t\t\tmcast-macaddr %s\n", addrbuf);
1236 }
1237 }
1238 out:
1239 if (ifmap != NULL)
1240 freeifmaddrs(ifmap);
1241 if (ifap != NULL)
1242 freeifaddrs(ifap);
1243
1244 return (error);
1245 }
1246