1 /* $KAME: ifmcstat.c,v 1.48 2006/11/15 05:13:59 itojun Exp $ */ 2 3 /* 4 * Copyright (c) 2007-2009 Bruce Simpson. 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/types.h> 37 #include <sys/param.h> 38 #include <sys/sysctl.h> 39 #include <sys/socket.h> 40 #include <sys/queue.h> 41 #include <sys/tree.h> 42 43 #include <net/if.h> 44 #include <net/if_var.h> 45 #include <net/if_types.h> 46 #include <net/if_dl.h> 47 #include <net/route.h> 48 49 #include <netinet/in.h> 50 #include <netinet/in_var.h> 51 #include <netinet/in_systm.h> 52 #include <netinet/ip.h> 53 #include <netinet/igmp.h> 54 #define KERNEL 55 # include <netinet/if_ether.h> 56 #undef KERNEL 57 #define _KERNEL 58 #define SYSCTL_DECL(x) 59 # include <netinet/igmp_var.h> 60 #undef SYSCTL_DECL 61 #undef _KERNEL 62 63 #ifdef INET6 64 #include <netinet/icmp6.h> 65 #define _KERNEL 66 # include <netinet6/mld6_var.h> 67 #undef _KERNEL 68 #endif /* INET6 */ 69 70 #include <arpa/inet.h> 71 #include <netdb.h> 72 73 #include <stddef.h> 74 #include <stdarg.h> 75 #include <stdint.h> 76 #include <stdio.h> 77 #include <stdlib.h> 78 #include <string.h> 79 80 #include <ctype.h> 81 #include <err.h> 82 #include <errno.h> 83 #include <fcntl.h> 84 #include <kvm.h> 85 #include <limits.h> 86 #include <ifaddrs.h> 87 #include <nlist.h> 88 #include <sysexits.h> 89 #include <unistd.h> 90 91 /* XXX: This file currently assumes INET and KVM support in the base system. */ 92 #ifndef INET 93 #define INET 94 #endif 95 96 extern void printb(const char *, unsigned int, const char *); 97 98 union sockunion { 99 struct sockaddr_storage ss; 100 struct sockaddr sa; 101 struct sockaddr_dl sdl; 102 #ifdef INET 103 struct sockaddr_in sin; 104 #endif 105 #ifdef INET6 106 struct sockaddr_in6 sin6; 107 #endif 108 }; 109 typedef union sockunion sockunion_t; 110 111 uint32_t ifindex = 0; 112 int af = AF_UNSPEC; 113 #ifdef WITH_KVM 114 int Kflag = 0; 115 #endif 116 int vflag = 0; 117 118 #define sa_equal(a1, a2) \ 119 (bcmp((a1), (a2), ((a1))->sa_len) == 0) 120 121 #define sa_dl_equal(a1, a2) \ 122 ((((struct sockaddr_dl *)(a1))->sdl_len == \ 123 ((struct sockaddr_dl *)(a2))->sdl_len) && \ 124 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \ 125 LLADDR((struct sockaddr_dl *)(a2)), \ 126 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 127 128 /* 129 * Most of the code in this utility is to support the use of KVM for 130 * post-mortem debugging of the multicast code. 131 */ 132 #ifdef WITH_KVM 133 134 #ifdef INET 135 static void if_addrlist(struct ifaddr *); 136 static struct in_multi * 137 in_multientry(struct in_multi *); 138 #endif /* INET */ 139 140 #ifdef INET6 141 static void if6_addrlist(struct ifaddr *); 142 static struct in6_multi * 143 in6_multientry(struct in6_multi *); 144 #endif /* INET6 */ 145 146 static void kread(u_long, void *, int); 147 static void ll_addrlist(struct ifaddr *); 148 149 static int ifmcstat_kvm(const char *kernel, const char *core); 150 151 #define KREAD(addr, buf, type) \ 152 kread((u_long)addr, (void *)buf, sizeof(type)) 153 154 kvm_t *kvmd; 155 struct nlist nl[] = { 156 { "_ifnet", 0, 0, 0, 0, }, 157 { "", 0, 0, 0, 0, }, 158 }; 159 #define N_IFNET 0 160 161 #endif /* WITH_KVM */ 162 163 static int ifmcstat_getifmaddrs(void); 164 #ifdef INET 165 static void in_ifinfo(struct igmp_ifinfo *); 166 static const char * inm_mode(u_int mode); 167 #endif 168 #ifdef INET6 169 static void in6_ifinfo(struct mld_ifinfo *); 170 static const char * inet6_n2a(struct in6_addr *); 171 #endif 172 int main(int, char **); 173 174 static void 175 usage() 176 { 177 178 fprintf(stderr, 179 "usage: ifmcstat [-i interface] [-f address family]" 180 " [-v]" 181 #ifdef WITH_KVM 182 " [-K] [-M core] [-N system]" 183 #endif 184 "\n"); 185 exit(EX_USAGE); 186 } 187 188 static const char *options = "i:f:vM:N:" 189 #ifdef WITH_KVM 190 "K" 191 #endif 192 ; 193 194 int 195 main(int argc, char **argv) 196 { 197 int c, error; 198 #ifdef WITH_KVM 199 const char *kernel = NULL; 200 const char *core = NULL; 201 #endif 202 203 while ((c = getopt(argc, argv, options)) != -1) { 204 switch (c) { 205 case 'i': 206 if ((ifindex = if_nametoindex(optarg)) == 0) { 207 fprintf(stderr, "%s: unknown interface\n", 208 optarg); 209 exit(EX_NOHOST); 210 } 211 break; 212 213 case 'f': 214 #ifdef INET 215 if (strcmp(optarg, "inet") == 0) { 216 af = AF_INET; 217 break; 218 } 219 #endif 220 #ifdef INET6 221 if (strcmp(optarg, "inet6") == 0) { 222 af = AF_INET6; 223 break; 224 } 225 #endif 226 if (strcmp(optarg, "link") == 0) { 227 af = AF_LINK; 228 break; 229 } 230 fprintf(stderr, "%s: unknown address family\n", optarg); 231 exit(EX_USAGE); 232 /*NOTREACHED*/ 233 break; 234 235 #ifdef WITH_KVM 236 case 'K': 237 ++Kflag; 238 break; 239 #endif 240 241 case 'v': 242 ++vflag; 243 break; 244 245 #ifdef WITH_KVM 246 case 'M': 247 core = strdup(optarg); 248 break; 249 250 case 'N': 251 kernel = strdup(optarg); 252 break; 253 #endif 254 255 default: 256 usage(); 257 break; 258 /*NOTREACHED*/ 259 } 260 } 261 262 if (af == AF_LINK && vflag) 263 usage(); 264 265 #ifdef WITH_KVM 266 if (Kflag) 267 error = ifmcstat_kvm(kernel, core); 268 /* 269 * If KVM failed, and user did not explicitly specify a core file, 270 * or force KVM backend to be disabled, try the sysctl backend. 271 */ 272 if (!Kflag || (error != 0 && (core == NULL && kernel == NULL))) 273 #endif 274 error = ifmcstat_getifmaddrs(); 275 if (error != 0) 276 exit(EX_OSERR); 277 278 exit(EX_OK); 279 /*NOTREACHED*/ 280 } 281 282 #ifdef INET 283 284 static void 285 in_ifinfo(struct igmp_ifinfo *igi) 286 { 287 288 printf("\t"); 289 switch (igi->igi_version) { 290 case IGMP_VERSION_1: 291 case IGMP_VERSION_2: 292 case IGMP_VERSION_3: 293 printf("igmpv%d", igi->igi_version); 294 break; 295 default: 296 printf("igmpv?(%d)", igi->igi_version); 297 break; 298 } 299 printb(" flags", igi->igi_flags, "\020\1SILENT\2LOOPBACK"); 300 if (igi->igi_version == IGMP_VERSION_3) { 301 printf(" rv %u qi %u qri %u uri %u", 302 igi->igi_rv, igi->igi_qi, igi->igi_qri, igi->igi_uri); 303 } 304 if (vflag >= 2) { 305 printf(" v1timer %u v2timer %u v3timer %u", 306 igi->igi_v1_timer, igi->igi_v2_timer, igi->igi_v3_timer); 307 } 308 printf("\n"); 309 } 310 311 static const char *inm_modes[] = { 312 "undefined", 313 "include", 314 "exclude", 315 }; 316 317 static const char * 318 inm_mode(u_int mode) 319 { 320 321 if (mode >= MCAST_UNDEFINED && mode <= MCAST_EXCLUDE) 322 return (inm_modes[mode]); 323 return (NULL); 324 } 325 326 #endif /* INET */ 327 328 #ifdef WITH_KVM 329 330 static int 331 ifmcstat_kvm(const char *kernel, const char *core) 332 { 333 char buf[_POSIX2_LINE_MAX], ifname[IFNAMSIZ]; 334 struct ifnet *ifp, *nifp, ifnet; 335 336 if ((kvmd = kvm_openfiles(kernel, core, NULL, O_RDONLY, buf)) == 337 NULL) { 338 perror("kvm_openfiles"); 339 return (-1); 340 } 341 if (kvm_nlist(kvmd, nl) < 0) { 342 perror("kvm_nlist"); 343 return (-1); 344 } 345 if (nl[N_IFNET].n_value == 0) { 346 printf("symbol %s not found\n", nl[N_IFNET].n_name); 347 return (-1); 348 } 349 KREAD(nl[N_IFNET].n_value, &ifp, struct ifnet *); 350 while (ifp) { 351 KREAD(ifp, &ifnet, struct ifnet); 352 nifp = ifnet.if_link.tqe_next; 353 if (ifindex && ifindex != ifnet.if_index) 354 goto next; 355 356 printf("%s:\n", if_indextoname(ifnet.if_index, ifname)); 357 #ifdef INET 358 if_addrlist(TAILQ_FIRST(&ifnet.if_addrhead)); 359 #endif 360 #ifdef INET6 361 if6_addrlist(TAILQ_FIRST(&ifnet.if_addrhead)); 362 #endif 363 if (vflag) 364 ll_addrlist(TAILQ_FIRST(&ifnet.if_addrhead)); 365 next: 366 ifp = nifp; 367 } 368 369 return (0); 370 } 371 372 static void 373 kread(u_long addr, void *buf, int len) 374 { 375 376 if (kvm_read(kvmd, addr, buf, len) != len) { 377 perror("kvm_read"); 378 exit(EX_OSERR); 379 } 380 } 381 382 static void 383 ll_addrlist(struct ifaddr *ifap) 384 { 385 char addrbuf[NI_MAXHOST]; 386 struct ifaddr ifa; 387 struct sockaddr sa; 388 struct sockaddr_dl sdl; 389 struct ifaddr *ifap0; 390 int error; 391 392 if (af && af != AF_LINK) 393 return; 394 395 ifap0 = ifap; 396 while (ifap) { 397 KREAD(ifap, &ifa, struct ifaddr); 398 if (ifa.ifa_addr == NULL) 399 goto nextifap; 400 KREAD(ifa.ifa_addr, &sa, struct sockaddr); 401 if (sa.sa_family != PF_LINK) 402 goto nextifap; 403 KREAD(ifa.ifa_addr, &sdl, struct sockaddr_dl); 404 if (sdl.sdl_alen == 0) 405 goto nextifap; 406 addrbuf[0] = '\0'; 407 error = getnameinfo((struct sockaddr *)&sdl, sdl.sdl_len, 408 addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST); 409 printf("\tlink %s\n", addrbuf); 410 nextifap: 411 ifap = ifa.ifa_link.tqe_next; 412 } 413 if (ifap0) { 414 struct ifnet ifnet; 415 struct ifmultiaddr ifm, *ifmp = 0; 416 417 KREAD(ifap0, &ifa, struct ifaddr); 418 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet); 419 if (TAILQ_FIRST(&ifnet.if_multiaddrs)) 420 ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs); 421 while (ifmp) { 422 KREAD(ifmp, &ifm, struct ifmultiaddr); 423 if (ifm.ifma_addr == NULL) 424 goto nextmulti; 425 KREAD(ifm.ifma_addr, &sa, struct sockaddr); 426 if (sa.sa_family != AF_LINK) 427 goto nextmulti; 428 KREAD(ifm.ifma_addr, &sdl, struct sockaddr_dl); 429 addrbuf[0] = '\0'; 430 error = getnameinfo((struct sockaddr *)&sdl, 431 sdl.sdl_len, addrbuf, sizeof(addrbuf), 432 NULL, 0, NI_NUMERICHOST); 433 printf("\t\tgroup %s refcnt %d\n", 434 addrbuf, ifm.ifma_refcount); 435 nextmulti: 436 ifmp = TAILQ_NEXT(&ifm, ifma_link); 437 } 438 } 439 } 440 441 #ifdef INET6 442 443 static void 444 if6_addrlist(struct ifaddr *ifap) 445 { 446 struct ifnet ifnet; 447 struct ifaddr ifa; 448 struct sockaddr sa; 449 struct in6_ifaddr if6a; 450 struct ifaddr *ifap0; 451 452 if (af && af != AF_INET6) 453 return; 454 ifap0 = ifap; 455 while (ifap) { 456 KREAD(ifap, &ifa, struct ifaddr); 457 if (ifa.ifa_addr == NULL) 458 goto nextifap; 459 KREAD(ifa.ifa_addr, &sa, struct sockaddr); 460 if (sa.sa_family != PF_INET6) 461 goto nextifap; 462 KREAD(ifap, &if6a, struct in6_ifaddr); 463 printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr)); 464 /* 465 * Print per-link MLD information, if available. 466 */ 467 if (ifa.ifa_ifp != NULL) { 468 struct in6_ifextra ie; 469 struct mld_ifinfo mli; 470 471 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet); 472 KREAD(ifnet.if_afdata[AF_INET6], &ie, 473 struct in6_ifextra); 474 if (ie.mld_ifinfo != NULL) { 475 KREAD(ie.mld_ifinfo, &mli, struct mld_ifinfo); 476 in6_ifinfo(&mli); 477 } 478 } 479 nextifap: 480 ifap = ifa.ifa_link.tqe_next; 481 } 482 if (ifap0) { 483 struct ifnet ifnet; 484 struct ifmultiaddr ifm, *ifmp = 0; 485 struct sockaddr_dl sdl; 486 487 KREAD(ifap0, &ifa, struct ifaddr); 488 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet); 489 if (TAILQ_FIRST(&ifnet.if_multiaddrs)) 490 ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs); 491 while (ifmp) { 492 KREAD(ifmp, &ifm, struct ifmultiaddr); 493 if (ifm.ifma_addr == NULL) 494 goto nextmulti; 495 KREAD(ifm.ifma_addr, &sa, struct sockaddr); 496 if (sa.sa_family != AF_INET6) 497 goto nextmulti; 498 (void)in6_multientry((struct in6_multi *) 499 ifm.ifma_protospec); 500 if (ifm.ifma_lladdr == 0) 501 goto nextmulti; 502 KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl); 503 printf("\t\t\tmcast-macaddr %s refcnt %d\n", 504 ether_ntoa((struct ether_addr *)LLADDR(&sdl)), 505 ifm.ifma_refcount); 506 nextmulti: 507 ifmp = TAILQ_NEXT(&ifm, ifma_link); 508 } 509 } 510 } 511 512 static struct in6_multi * 513 in6_multientry(struct in6_multi *mc) 514 { 515 struct in6_multi multi; 516 517 KREAD(mc, &multi, struct in6_multi); 518 printf("\t\tgroup %s", inet6_n2a(&multi.in6m_addr)); 519 printf(" refcnt %u\n", multi.in6m_refcount); 520 521 return (multi.in6m_entry.le_next); 522 } 523 524 #endif /* INET6 */ 525 526 #ifdef INET 527 528 static void 529 if_addrlist(struct ifaddr *ifap) 530 { 531 struct ifaddr ifa; 532 struct ifnet ifnet; 533 struct sockaddr sa; 534 struct in_ifaddr ia; 535 struct ifaddr *ifap0; 536 537 if (af && af != AF_INET) 538 return; 539 ifap0 = ifap; 540 while (ifap) { 541 KREAD(ifap, &ifa, struct ifaddr); 542 if (ifa.ifa_addr == NULL) 543 goto nextifap; 544 KREAD(ifa.ifa_addr, &sa, struct sockaddr); 545 if (sa.sa_family != PF_INET) 546 goto nextifap; 547 KREAD(ifap, &ia, struct in_ifaddr); 548 printf("\tinet %s\n", inet_ntoa(ia.ia_addr.sin_addr)); 549 /* 550 * Print per-link IGMP information, if available. 551 */ 552 if (ifa.ifa_ifp != NULL) { 553 struct in_ifinfo ii; 554 struct igmp_ifinfo igi; 555 556 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet); 557 KREAD(ifnet.if_afdata[AF_INET], &ii, struct in_ifinfo); 558 if (ii.ii_igmp != NULL) { 559 KREAD(ii.ii_igmp, &igi, struct igmp_ifinfo); 560 in_ifinfo(&igi); 561 } 562 } 563 nextifap: 564 ifap = ifa.ifa_link.tqe_next; 565 } 566 if (ifap0) { 567 struct ifmultiaddr ifm, *ifmp = 0; 568 struct sockaddr_dl sdl; 569 570 KREAD(ifap0, &ifa, struct ifaddr); 571 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet); 572 if (TAILQ_FIRST(&ifnet.if_multiaddrs)) 573 ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs); 574 while (ifmp) { 575 KREAD(ifmp, &ifm, struct ifmultiaddr); 576 if (ifm.ifma_addr == NULL) 577 goto nextmulti; 578 KREAD(ifm.ifma_addr, &sa, struct sockaddr); 579 if (sa.sa_family != AF_INET) 580 goto nextmulti; 581 (void)in_multientry((struct in_multi *) 582 ifm.ifma_protospec); 583 if (ifm.ifma_lladdr == 0) 584 goto nextmulti; 585 KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl); 586 printf("\t\t\tmcast-macaddr %s refcnt %d\n", 587 ether_ntoa((struct ether_addr *)LLADDR(&sdl)), 588 ifm.ifma_refcount); 589 nextmulti: 590 ifmp = TAILQ_NEXT(&ifm, ifma_link); 591 } 592 } 593 } 594 595 static const char *inm_states[] = { 596 "not-member", 597 "silent", 598 "idle", 599 "lazy", 600 "sleeping", 601 "awakening", 602 "query-pending", 603 "sg-query-pending", 604 "leaving" 605 }; 606 607 static const char * 608 inm_state(u_int state) 609 { 610 611 if (state >= IGMP_NOT_MEMBER && state <= IGMP_LEAVING_MEMBER) 612 return (inm_states[state]); 613 return (NULL); 614 } 615 616 #if 0 617 static struct ip_msource * 618 ims_min_kvm(struct in_multi *pinm) 619 { 620 struct ip_msource ims0; 621 struct ip_msource *tmp, *parent; 622 623 parent = NULL; 624 tmp = RB_ROOT(&pinm->inm_srcs); 625 while (tmp) { 626 parent = tmp; 627 KREAD(tmp, &ims0, struct ip_msource); 628 tmp = RB_LEFT(&ims0, ims_link); 629 } 630 return (parent); /* kva */ 631 } 632 633 /* XXX This routine is buggy. See RB_NEXT in sys/tree.h. */ 634 static struct ip_msource * 635 ims_next_kvm(struct ip_msource *ims) 636 { 637 struct ip_msource ims0, ims1; 638 struct ip_msource *tmp; 639 640 KREAD(ims, &ims0, struct ip_msource); 641 if (RB_RIGHT(&ims0, ims_link)) { 642 ims = RB_RIGHT(&ims0, ims_link); 643 KREAD(ims, &ims1, struct ip_msource); 644 while ((tmp = RB_LEFT(&ims1, ims_link))) { 645 KREAD(tmp, &ims0, struct ip_msource); 646 ims = RB_LEFT(&ims0, ims_link); 647 } 648 } else { 649 tmp = RB_PARENT(&ims0, ims_link); 650 if (tmp) { 651 KREAD(tmp, &ims1, struct ip_msource); 652 if (ims == RB_LEFT(&ims1, ims_link)) 653 ims = tmp; 654 } else { 655 while ((tmp = RB_PARENT(&ims0, ims_link))) { 656 KREAD(tmp, &ims1, struct ip_msource); 657 if (ims == RB_RIGHT(&ims1, ims_link)) { 658 ims = tmp; 659 KREAD(ims, &ims0, struct ip_msource); 660 } else 661 break; 662 } 663 ims = RB_PARENT(&ims0, ims_link); 664 } 665 } 666 return (ims); /* kva */ 667 } 668 669 static void 670 inm_print_sources_kvm(struct in_multi *pinm) 671 { 672 struct ip_msource ims0; 673 struct ip_msource *ims; 674 struct in_addr src; 675 int cnt; 676 uint8_t fmode; 677 678 cnt = 0; 679 fmode = pinm->inm_st[1].iss_fmode; 680 if (fmode == MCAST_UNDEFINED) 681 return; 682 for (ims = ims_min_kvm(pinm); ims != NULL; ims = ims_next_kvm(ims)) { 683 if (cnt == 0) 684 printf(" srcs "); 685 KREAD(ims, &ims0, struct ip_msource); 686 /* Only print sources in-mode at t1. */ 687 if (fmode != ims_get_mode(pinm, ims, 1)) 688 continue; 689 src.s_addr = htonl(ims0.ims_haddr); 690 printf("%s%s", (cnt++ == 0 ? "" : ","), inet_ntoa(src)); 691 } 692 } 693 #endif 694 695 static struct in_multi * 696 in_multientry(struct in_multi *pinm) 697 { 698 struct in_multi inm; 699 const char *state, *mode; 700 701 KREAD(pinm, &inm, struct in_multi); 702 printf("\t\tgroup %s", inet_ntoa(inm.inm_addr)); 703 printf(" refcnt %u", inm.inm_refcount); 704 705 state = inm_state(inm.inm_state); 706 if (state) 707 printf(" state %s", state); 708 else 709 printf(" state (%d)", inm.inm_state); 710 711 mode = inm_mode(inm.inm_st[1].iss_fmode); 712 if (mode) 713 printf(" mode %s", mode); 714 else 715 printf(" mode (%d)", inm.inm_st[1].iss_fmode); 716 717 if (vflag >= 2) { 718 printf(" asm %u ex %u in %u rec %u", 719 (u_int)inm.inm_st[1].iss_asm, 720 (u_int)inm.inm_st[1].iss_ex, 721 (u_int)inm.inm_st[1].iss_in, 722 (u_int)inm.inm_st[1].iss_rec); 723 } 724 725 #if 0 726 /* Buggy. */ 727 if (vflag) 728 inm_print_sources_kvm(&inm); 729 #endif 730 731 printf("\n"); 732 return (NULL); 733 } 734 735 #endif /* INET */ 736 737 #endif /* WITH_KVM */ 738 739 #ifdef INET6 740 741 static void 742 in6_ifinfo(struct mld_ifinfo *mli) 743 { 744 745 printf("\t"); 746 switch (mli->mli_version) { 747 case MLD_VERSION_1: 748 case MLD_VERSION_2: 749 printf("mldv%d", mli->mli_version); 750 break; 751 default: 752 printf("mldv?(%d)", mli->mli_version); 753 break; 754 } 755 printb(" flags", mli->mli_flags, "\020\1SILENT"); 756 if (mli->mli_version == MLD_VERSION_2) { 757 printf(" rv %u qi %u qri %u uri %u", 758 mli->mli_rv, mli->mli_qi, mli->mli_qri, mli->mli_uri); 759 } 760 if (vflag >= 2) { 761 printf(" v1timer %u v2timer %u", mli->mli_v1_timer, 762 mli->mli_v2_timer); 763 } 764 printf("\n"); 765 } 766 767 static const char * 768 inet6_n2a(struct in6_addr *p) 769 { 770 static char buf[NI_MAXHOST]; 771 struct sockaddr_in6 sin6; 772 u_int32_t scopeid; 773 const int niflags = NI_NUMERICHOST; 774 775 memset(&sin6, 0, sizeof(sin6)); 776 sin6.sin6_family = AF_INET6; 777 sin6.sin6_len = sizeof(struct sockaddr_in6); 778 sin6.sin6_addr = *p; 779 if (IN6_IS_ADDR_LINKLOCAL(p) || IN6_IS_ADDR_MC_LINKLOCAL(p) || 780 IN6_IS_ADDR_MC_NODELOCAL(p)) { 781 scopeid = ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]); 782 if (scopeid) { 783 sin6.sin6_scope_id = scopeid; 784 sin6.sin6_addr.s6_addr[2] = 0; 785 sin6.sin6_addr.s6_addr[3] = 0; 786 } 787 } 788 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 789 buf, sizeof(buf), NULL, 0, niflags) == 0) { 790 return (buf); 791 } else { 792 return ("(invalid)"); 793 } 794 } 795 #endif /* INET6 */ 796 797 #ifdef INET 798 /* 799 * Retrieve per-group source filter mode and lists via sysctl. 800 */ 801 static void 802 inm_print_sources_sysctl(uint32_t ifindex, struct in_addr gina) 803 { 804 #define MAX_SYSCTL_TRY 5 805 int mib[7]; 806 int ntry = 0; 807 size_t mibsize; 808 size_t len; 809 size_t needed; 810 size_t cnt; 811 int i; 812 char *buf; 813 struct in_addr *pina; 814 uint32_t *p; 815 uint32_t fmode; 816 const char *modestr; 817 818 mibsize = sizeof(mib) / sizeof(mib[0]); 819 if (sysctlnametomib("net.inet.ip.mcast.filters", mib, &mibsize) == -1) { 820 perror("sysctlnametomib"); 821 return; 822 } 823 824 needed = 0; 825 mib[5] = ifindex; 826 mib[6] = gina.s_addr; /* 32 bits wide */ 827 mibsize = sizeof(mib) / sizeof(mib[0]); 828 do { 829 if (sysctl(mib, mibsize, NULL, &needed, NULL, 0) == -1) { 830 perror("sysctl net.inet.ip.mcast.filters"); 831 return; 832 } 833 if ((buf = malloc(needed)) == NULL) { 834 perror("malloc"); 835 return; 836 } 837 if (sysctl(mib, mibsize, buf, &needed, NULL, 0) == -1) { 838 if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) { 839 perror("sysctl"); 840 goto out_free; 841 } 842 free(buf); 843 buf = NULL; 844 } 845 } while (buf == NULL); 846 847 len = needed; 848 if (len < sizeof(uint32_t)) { 849 perror("sysctl"); 850 goto out_free; 851 } 852 853 p = (uint32_t *)buf; 854 fmode = *p++; 855 len -= sizeof(uint32_t); 856 857 modestr = inm_mode(fmode); 858 if (modestr) 859 printf(" mode %s", modestr); 860 else 861 printf(" mode (%u)", fmode); 862 863 if (vflag == 0) 864 goto out_free; 865 866 cnt = len / sizeof(struct in_addr); 867 pina = (struct in_addr *)p; 868 869 for (i = 0; i < cnt; i++) { 870 if (i == 0) 871 printf(" srcs "); 872 fprintf(stdout, "%s%s", (i == 0 ? "" : ","), 873 inet_ntoa(*pina++)); 874 len -= sizeof(struct in_addr); 875 } 876 if (len > 0) { 877 fprintf(stderr, "warning: %u trailing bytes from %s\n", 878 (unsigned int)len, "net.inet.ip.mcast.filters"); 879 } 880 881 out_free: 882 free(buf); 883 #undef MAX_SYSCTL_TRY 884 } 885 886 #endif /* INET */ 887 888 #ifdef INET6 889 /* 890 * Retrieve MLD per-group source filter mode and lists via sysctl. 891 * 892 * Note: The 128-bit IPv6 group address needs to be segmented into 893 * 32-bit pieces for marshaling to sysctl. So the MIB name ends 894 * up looking like this: 895 * a.b.c.d.e.ifindex.g[0].g[1].g[2].g[3] 896 * Assumes that pgroup originated from the kernel, so its components 897 * are already in network-byte order. 898 */ 899 static void 900 in6m_print_sources_sysctl(uint32_t ifindex, struct in6_addr *pgroup) 901 { 902 #define MAX_SYSCTL_TRY 5 903 char addrbuf[INET6_ADDRSTRLEN]; 904 int mib[10]; 905 int ntry = 0; 906 int *pi; 907 size_t mibsize; 908 size_t len; 909 size_t needed; 910 size_t cnt; 911 int i; 912 char *buf; 913 struct in6_addr *pina; 914 uint32_t *p; 915 uint32_t fmode; 916 const char *modestr; 917 918 mibsize = sizeof(mib) / sizeof(mib[0]); 919 if (sysctlnametomib("net.inet6.ip6.mcast.filters", mib, 920 &mibsize) == -1) { 921 perror("sysctlnametomib"); 922 return; 923 } 924 925 needed = 0; 926 mib[5] = ifindex; 927 pi = (int *)pgroup; 928 for (i = 0; i < 4; i++) 929 mib[6 + i] = *pi++; 930 931 mibsize = sizeof(mib) / sizeof(mib[0]); 932 do { 933 if (sysctl(mib, mibsize, NULL, &needed, NULL, 0) == -1) { 934 perror("sysctl net.inet6.ip6.mcast.filters"); 935 return; 936 } 937 if ((buf = malloc(needed)) == NULL) { 938 perror("malloc"); 939 return; 940 } 941 if (sysctl(mib, mibsize, buf, &needed, NULL, 0) == -1) { 942 if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) { 943 perror("sysctl"); 944 goto out_free; 945 } 946 free(buf); 947 buf = NULL; 948 } 949 } while (buf == NULL); 950 951 len = needed; 952 if (len < sizeof(uint32_t)) { 953 perror("sysctl"); 954 goto out_free; 955 } 956 957 p = (uint32_t *)buf; 958 fmode = *p++; 959 len -= sizeof(uint32_t); 960 961 modestr = inm_mode(fmode); 962 if (modestr) 963 printf(" mode %s", modestr); 964 else 965 printf(" mode (%u)", fmode); 966 967 if (vflag == 0) 968 goto out_free; 969 970 cnt = len / sizeof(struct in6_addr); 971 pina = (struct in6_addr *)p; 972 973 for (i = 0; i < cnt; i++) { 974 if (i == 0) 975 printf(" srcs "); 976 inet_ntop(AF_INET6, (const char *)pina++, addrbuf, 977 INET6_ADDRSTRLEN); 978 fprintf(stdout, "%s%s", (i == 0 ? "" : ","), addrbuf); 979 len -= sizeof(struct in6_addr); 980 } 981 if (len > 0) { 982 fprintf(stderr, "warning: %u trailing bytes from %s\n", 983 (unsigned int)len, "net.inet6.ip6.mcast.filters"); 984 } 985 986 out_free: 987 free(buf); 988 #undef MAX_SYSCTL_TRY 989 } 990 #endif /* INET6 */ 991 992 static int 993 ifmcstat_getifmaddrs(void) 994 { 995 char thisifname[IFNAMSIZ]; 996 char addrbuf[NI_MAXHOST]; 997 struct ifaddrs *ifap, *ifa; 998 struct ifmaddrs *ifmap, *ifma; 999 sockunion_t lastifasa; 1000 sockunion_t *psa, *pgsa, *pllsa, *pifasa; 1001 char *pcolon; 1002 char *pafname; 1003 uint32_t lastifindex, thisifindex; 1004 int error; 1005 1006 error = 0; 1007 ifap = NULL; 1008 ifmap = NULL; 1009 lastifindex = 0; 1010 thisifindex = 0; 1011 lastifasa.ss.ss_family = AF_UNSPEC; 1012 1013 if (getifaddrs(&ifap) != 0) { 1014 warn("getifmaddrs"); 1015 return (-1); 1016 } 1017 1018 if (getifmaddrs(&ifmap) != 0) { 1019 warn("getifmaddrs"); 1020 error = -1; 1021 goto out; 1022 } 1023 1024 for (ifma = ifmap; ifma; ifma = ifma->ifma_next) { 1025 error = 0; 1026 if (ifma->ifma_name == NULL || ifma->ifma_addr == NULL) 1027 continue; 1028 1029 psa = (sockunion_t *)ifma->ifma_name; 1030 if (psa->sa.sa_family != AF_LINK) { 1031 fprintf(stderr, 1032 "WARNING: Kernel returned invalid data.\n"); 1033 error = -1; 1034 break; 1035 } 1036 1037 /* Filter on interface name. */ 1038 thisifindex = psa->sdl.sdl_index; 1039 if (ifindex != 0 && thisifindex != ifindex) 1040 continue; 1041 1042 /* Filter on address family. */ 1043 pgsa = (sockunion_t *)ifma->ifma_addr; 1044 if (af != 0 && pgsa->sa.sa_family != af) 1045 continue; 1046 1047 strlcpy(thisifname, link_ntoa(&psa->sdl), IFNAMSIZ); 1048 pcolon = strchr(thisifname, ':'); 1049 if (pcolon) 1050 *pcolon = '\0'; 1051 1052 /* Only print the banner for the first ifmaddrs entry. */ 1053 if (lastifindex == 0 || lastifindex != thisifindex) { 1054 lastifindex = thisifindex; 1055 fprintf(stdout, "%s:\n", thisifname); 1056 } 1057 1058 /* 1059 * Currently, multicast joins only take place on the 1060 * primary IPv4 address, and only on the link-local IPv6 1061 * address, as per IGMPv2/3 and MLDv1/2 semantics. 1062 * Therefore, we only look up the primary address on 1063 * the first pass. 1064 */ 1065 pifasa = NULL; 1066 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1067 if ((strcmp(ifa->ifa_name, thisifname) != 0) || 1068 (ifa->ifa_addr == NULL) || 1069 (ifa->ifa_addr->sa_family != pgsa->sa.sa_family)) 1070 continue; 1071 /* 1072 * For AF_INET6 only the link-local address should 1073 * be returned. If built without IPv6 support, 1074 * skip this address entirely. 1075 */ 1076 pifasa = (sockunion_t *)ifa->ifa_addr; 1077 if (pifasa->sa.sa_family == AF_INET6 1078 #ifdef INET6 1079 && !IN6_IS_ADDR_LINKLOCAL(&pifasa->sin6.sin6_addr) 1080 #endif 1081 ) { 1082 pifasa = NULL; 1083 continue; 1084 } 1085 break; 1086 } 1087 if (pifasa == NULL) 1088 continue; /* primary address not found */ 1089 1090 if (!vflag && pifasa->sa.sa_family == AF_LINK) 1091 continue; 1092 1093 /* Parse and print primary address, if not already printed. */ 1094 if (lastifasa.ss.ss_family == AF_UNSPEC || 1095 ((lastifasa.ss.ss_family == AF_LINK && 1096 !sa_dl_equal(&lastifasa.sa, &pifasa->sa)) || 1097 !sa_equal(&lastifasa.sa, &pifasa->sa))) { 1098 1099 switch (pifasa->sa.sa_family) { 1100 case AF_INET: 1101 pafname = "inet"; 1102 break; 1103 case AF_INET6: 1104 pafname = "inet6"; 1105 break; 1106 case AF_LINK: 1107 pafname = "link"; 1108 break; 1109 default: 1110 pafname = "unknown"; 1111 break; 1112 } 1113 1114 switch (pifasa->sa.sa_family) { 1115 case AF_INET6: 1116 #ifdef INET6 1117 { 1118 const char *p = 1119 inet6_n2a(&pifasa->sin6.sin6_addr); 1120 strlcpy(addrbuf, p, sizeof(addrbuf)); 1121 break; 1122 } 1123 #else 1124 /* FALLTHROUGH */ 1125 #endif 1126 case AF_INET: 1127 case AF_LINK: 1128 error = getnameinfo(&pifasa->sa, 1129 pifasa->sa.sa_len, 1130 addrbuf, sizeof(addrbuf), NULL, 0, 1131 NI_NUMERICHOST); 1132 if (error) 1133 perror("getnameinfo"); 1134 break; 1135 default: 1136 addrbuf[0] = '\0'; 1137 break; 1138 } 1139 1140 fprintf(stdout, "\t%s %s\n", pafname, addrbuf); 1141 #ifdef INET 1142 /* 1143 * Print per-link IGMP information, if available. 1144 */ 1145 if (pifasa->sa.sa_family == AF_INET) { 1146 struct igmp_ifinfo igi; 1147 size_t mibsize, len; 1148 int mib[5]; 1149 1150 mibsize = sizeof(mib) / sizeof(mib[0]); 1151 if (sysctlnametomib("net.inet.igmp.ifinfo", 1152 mib, &mibsize) == -1) { 1153 perror("sysctlnametomib"); 1154 goto next_ifnet; 1155 } 1156 mib[mibsize] = thisifindex; 1157 len = sizeof(struct igmp_ifinfo); 1158 if (sysctl(mib, mibsize + 1, &igi, &len, NULL, 1159 0) == -1) { 1160 perror("sysctl net.inet.igmp.ifinfo"); 1161 goto next_ifnet; 1162 } 1163 in_ifinfo(&igi); 1164 } 1165 #endif /* INET */ 1166 #ifdef INET6 1167 /* 1168 * Print per-link MLD information, if available. 1169 */ 1170 if (pifasa->sa.sa_family == AF_INET6) { 1171 struct mld_ifinfo mli; 1172 size_t mibsize, len; 1173 int mib[5]; 1174 1175 mibsize = sizeof(mib) / sizeof(mib[0]); 1176 if (sysctlnametomib("net.inet6.mld.ifinfo", 1177 mib, &mibsize) == -1) { 1178 perror("sysctlnametomib"); 1179 goto next_ifnet; 1180 } 1181 mib[mibsize] = thisifindex; 1182 len = sizeof(struct mld_ifinfo); 1183 if (sysctl(mib, mibsize + 1, &mli, &len, NULL, 1184 0) == -1) { 1185 perror("sysctl net.inet6.mld.ifinfo"); 1186 goto next_ifnet; 1187 } 1188 in6_ifinfo(&mli); 1189 } 1190 #endif /* INET6 */ 1191 #if defined(INET) || defined(INET6) 1192 next_ifnet: 1193 #endif 1194 lastifasa = *pifasa; 1195 } 1196 1197 /* Print this group address. */ 1198 #ifdef INET6 1199 if (pgsa->sa.sa_family == AF_INET6) { 1200 const char *p = inet6_n2a(&pgsa->sin6.sin6_addr); 1201 strlcpy(addrbuf, p, sizeof(addrbuf)); 1202 } else 1203 #endif 1204 { 1205 error = getnameinfo(&pgsa->sa, pgsa->sa.sa_len, 1206 addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST); 1207 if (error) 1208 perror("getnameinfo"); 1209 } 1210 1211 fprintf(stdout, "\t\tgroup %s", addrbuf); 1212 #ifdef INET 1213 if (pgsa->sa.sa_family == AF_INET) { 1214 inm_print_sources_sysctl(thisifindex, 1215 pgsa->sin.sin_addr); 1216 } 1217 #endif 1218 #ifdef INET6 1219 if (pgsa->sa.sa_family == AF_INET6) { 1220 in6m_print_sources_sysctl(thisifindex, 1221 &pgsa->sin6.sin6_addr); 1222 } 1223 #endif 1224 fprintf(stdout, "\n"); 1225 1226 /* Link-layer mapping, if present. */ 1227 pllsa = (sockunion_t *)ifma->ifma_lladdr; 1228 if (pllsa != NULL) { 1229 error = getnameinfo(&pllsa->sa, pllsa->sa.sa_len, 1230 addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST); 1231 fprintf(stdout, "\t\t\tmcast-macaddr %s\n", addrbuf); 1232 } 1233 } 1234 out: 1235 if (ifmap != NULL) 1236 freeifmaddrs(ifmap); 1237 if (ifap != NULL) 1238 freeifaddrs(ifap); 1239 1240 return (error); 1241 } 1242