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 *, uint32_t); 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; 390 391 if (af && af != AF_LINK) 392 return; 393 394 ifap0 = ifap; 395 while (ifap) { 396 KREAD(ifap, &ifa, struct ifaddr); 397 if (ifa.ifa_addr == NULL) 398 goto nextifap; 399 KREAD(ifa.ifa_addr, &sa, struct sockaddr); 400 if (sa.sa_family != PF_LINK) 401 goto nextifap; 402 KREAD(ifa.ifa_addr, &sdl, struct sockaddr_dl); 403 if (sdl.sdl_alen == 0) 404 goto nextifap; 405 addrbuf[0] = '\0'; 406 getnameinfo((struct sockaddr *)&sdl, sdl.sdl_len, 407 addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST); 408 printf("\tlink %s\n", addrbuf); 409 nextifap: 410 ifap = ifa.ifa_link.tqe_next; 411 } 412 if (ifap0) { 413 struct ifnet ifnet; 414 struct ifmultiaddr ifm, *ifmp = 0; 415 416 KREAD(ifap0, &ifa, struct ifaddr); 417 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet); 418 if (TAILQ_FIRST(&ifnet.if_multiaddrs)) 419 ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs); 420 while (ifmp) { 421 KREAD(ifmp, &ifm, struct ifmultiaddr); 422 if (ifm.ifma_addr == NULL) 423 goto nextmulti; 424 KREAD(ifm.ifma_addr, &sa, struct sockaddr); 425 if (sa.sa_family != AF_LINK) 426 goto nextmulti; 427 KREAD(ifm.ifma_addr, &sdl, struct sockaddr_dl); 428 addrbuf[0] = '\0'; 429 getnameinfo((struct sockaddr *)&sdl, 430 sdl.sdl_len, addrbuf, sizeof(addrbuf), 431 NULL, 0, NI_NUMERICHOST); 432 printf("\t\tgroup %s refcnt %d\n", 433 addrbuf, ifm.ifma_refcount); 434 nextmulti: 435 ifmp = TAILQ_NEXT(&ifm, ifma_link); 436 } 437 } 438 } 439 440 #ifdef INET6 441 442 static void 443 if6_addrlist(struct ifaddr *ifap) 444 { 445 struct ifnet ifnet; 446 struct ifaddr ifa; 447 struct sockaddr sa; 448 struct in6_ifaddr if6a; 449 struct ifaddr *ifap0; 450 451 if (af && af != AF_INET6) 452 return; 453 ifap0 = ifap; 454 while (ifap) { 455 KREAD(ifap, &ifa, struct ifaddr); 456 if (ifa.ifa_addr == NULL) 457 goto nextifap; 458 KREAD(ifa.ifa_addr, &sa, struct sockaddr); 459 if (sa.sa_family != PF_INET6) 460 goto nextifap; 461 KREAD(ifap, &if6a, struct in6_ifaddr); 462 printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr, 463 if6a.ia_addr.sin6_scope_id)); 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, 0)); 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\2USEALLOW"); 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, uint32_t scope_id) 769 { 770 static char buf[NI_MAXHOST]; 771 struct sockaddr_in6 sin6; 772 const int niflags = NI_NUMERICHOST; 773 774 memset(&sin6, 0, sizeof(sin6)); 775 sin6.sin6_family = AF_INET6; 776 sin6.sin6_len = sizeof(struct sockaddr_in6); 777 sin6.sin6_addr = *p; 778 sin6.sin6_scope_id = scope_id; 779 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, 780 buf, sizeof(buf), NULL, 0, niflags) == 0) { 781 return (buf); 782 } else { 783 return ("(invalid)"); 784 } 785 } 786 #endif /* INET6 */ 787 788 #ifdef INET 789 /* 790 * Retrieve per-group source filter mode and lists via sysctl. 791 */ 792 static void 793 inm_print_sources_sysctl(uint32_t ifindex, struct in_addr gina) 794 { 795 #define MAX_SYSCTL_TRY 5 796 int mib[7]; 797 int ntry = 0; 798 size_t mibsize; 799 size_t len; 800 size_t needed; 801 size_t cnt; 802 int i; 803 char *buf; 804 struct in_addr *pina; 805 uint32_t *p; 806 uint32_t fmode; 807 const char *modestr; 808 809 mibsize = sizeof(mib) / sizeof(mib[0]); 810 if (sysctlnametomib("net.inet.ip.mcast.filters", mib, &mibsize) == -1) { 811 perror("sysctlnametomib"); 812 return; 813 } 814 815 needed = 0; 816 mib[5] = ifindex; 817 mib[6] = gina.s_addr; /* 32 bits wide */ 818 mibsize = sizeof(mib) / sizeof(mib[0]); 819 do { 820 if (sysctl(mib, mibsize, NULL, &needed, NULL, 0) == -1) { 821 perror("sysctl net.inet.ip.mcast.filters"); 822 return; 823 } 824 if ((buf = malloc(needed)) == NULL) { 825 perror("malloc"); 826 return; 827 } 828 if (sysctl(mib, mibsize, buf, &needed, NULL, 0) == -1) { 829 if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) { 830 perror("sysctl"); 831 goto out_free; 832 } 833 free(buf); 834 buf = NULL; 835 } 836 } while (buf == NULL); 837 838 len = needed; 839 if (len < sizeof(uint32_t)) { 840 perror("sysctl"); 841 goto out_free; 842 } 843 844 p = (uint32_t *)buf; 845 fmode = *p++; 846 len -= sizeof(uint32_t); 847 848 modestr = inm_mode(fmode); 849 if (modestr) 850 printf(" mode %s", modestr); 851 else 852 printf(" mode (%u)", fmode); 853 854 if (vflag == 0) 855 goto out_free; 856 857 cnt = len / sizeof(struct in_addr); 858 pina = (struct in_addr *)p; 859 860 for (i = 0; i < cnt; i++) { 861 if (i == 0) 862 printf(" srcs "); 863 fprintf(stdout, "%s%s", (i == 0 ? "" : ","), 864 inet_ntoa(*pina++)); 865 len -= sizeof(struct in_addr); 866 } 867 if (len > 0) { 868 fprintf(stderr, "warning: %u trailing bytes from %s\n", 869 (unsigned int)len, "net.inet.ip.mcast.filters"); 870 } 871 872 out_free: 873 free(buf); 874 #undef MAX_SYSCTL_TRY 875 } 876 877 #endif /* INET */ 878 879 #ifdef INET6 880 /* 881 * Retrieve MLD per-group source filter mode and lists via sysctl. 882 * 883 * Note: The 128-bit IPv6 group address needs to be segmented into 884 * 32-bit pieces for marshaling to sysctl. So the MIB name ends 885 * up looking like this: 886 * a.b.c.d.e.ifindex.g[0].g[1].g[2].g[3] 887 * Assumes that pgroup originated from the kernel, so its components 888 * are already in network-byte order. 889 */ 890 static void 891 in6m_print_sources_sysctl(uint32_t ifindex, struct in6_addr *pgroup) 892 { 893 #define MAX_SYSCTL_TRY 5 894 char addrbuf[INET6_ADDRSTRLEN]; 895 int mib[10]; 896 int ntry = 0; 897 int *pi; 898 size_t mibsize; 899 size_t len; 900 size_t needed; 901 size_t cnt; 902 int i; 903 char *buf; 904 struct in6_addr *pina; 905 uint32_t *p; 906 uint32_t fmode; 907 const char *modestr; 908 909 mibsize = sizeof(mib) / sizeof(mib[0]); 910 if (sysctlnametomib("net.inet6.ip6.mcast.filters", mib, 911 &mibsize) == -1) { 912 perror("sysctlnametomib"); 913 return; 914 } 915 916 needed = 0; 917 mib[5] = ifindex; 918 pi = (int *)pgroup; 919 for (i = 0; i < 4; i++) 920 mib[6 + i] = *pi++; 921 922 mibsize = sizeof(mib) / sizeof(mib[0]); 923 do { 924 if (sysctl(mib, mibsize, NULL, &needed, NULL, 0) == -1) { 925 perror("sysctl net.inet6.ip6.mcast.filters"); 926 return; 927 } 928 if ((buf = malloc(needed)) == NULL) { 929 perror("malloc"); 930 return; 931 } 932 if (sysctl(mib, mibsize, buf, &needed, NULL, 0) == -1) { 933 if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) { 934 perror("sysctl"); 935 goto out_free; 936 } 937 free(buf); 938 buf = NULL; 939 } 940 } while (buf == NULL); 941 942 len = needed; 943 if (len < sizeof(uint32_t)) { 944 perror("sysctl"); 945 goto out_free; 946 } 947 948 p = (uint32_t *)buf; 949 fmode = *p++; 950 len -= sizeof(uint32_t); 951 952 modestr = inm_mode(fmode); 953 if (modestr) 954 printf(" mode %s", modestr); 955 else 956 printf(" mode (%u)", fmode); 957 958 if (vflag == 0) 959 goto out_free; 960 961 cnt = len / sizeof(struct in6_addr); 962 pina = (struct in6_addr *)p; 963 964 for (i = 0; i < cnt; i++) { 965 if (i == 0) 966 printf(" srcs "); 967 inet_ntop(AF_INET6, (const char *)pina++, addrbuf, 968 INET6_ADDRSTRLEN); 969 fprintf(stdout, "%s%s", (i == 0 ? "" : ","), addrbuf); 970 len -= sizeof(struct in6_addr); 971 } 972 if (len > 0) { 973 fprintf(stderr, "warning: %u trailing bytes from %s\n", 974 (unsigned int)len, "net.inet6.ip6.mcast.filters"); 975 } 976 977 out_free: 978 free(buf); 979 #undef MAX_SYSCTL_TRY 980 } 981 #endif /* INET6 */ 982 983 static int 984 ifmcstat_getifmaddrs(void) 985 { 986 char thisifname[IFNAMSIZ]; 987 char addrbuf[NI_MAXHOST]; 988 struct ifaddrs *ifap, *ifa; 989 struct ifmaddrs *ifmap, *ifma; 990 sockunion_t lastifasa; 991 sockunion_t *psa, *pgsa, *pllsa, *pifasa; 992 char *pcolon; 993 char *pafname; 994 uint32_t lastifindex, thisifindex; 995 int error; 996 997 error = 0; 998 ifap = NULL; 999 ifmap = NULL; 1000 lastifindex = 0; 1001 thisifindex = 0; 1002 lastifasa.ss.ss_family = AF_UNSPEC; 1003 1004 if (getifaddrs(&ifap) != 0) { 1005 warn("getifmaddrs"); 1006 return (-1); 1007 } 1008 1009 if (getifmaddrs(&ifmap) != 0) { 1010 warn("getifmaddrs"); 1011 error = -1; 1012 goto out; 1013 } 1014 1015 for (ifma = ifmap; ifma; ifma = ifma->ifma_next) { 1016 error = 0; 1017 if (ifma->ifma_name == NULL || ifma->ifma_addr == NULL) 1018 continue; 1019 1020 psa = (sockunion_t *)ifma->ifma_name; 1021 if (psa->sa.sa_family != AF_LINK) { 1022 fprintf(stderr, 1023 "WARNING: Kernel returned invalid data.\n"); 1024 error = -1; 1025 break; 1026 } 1027 1028 /* Filter on interface name. */ 1029 thisifindex = psa->sdl.sdl_index; 1030 if (ifindex != 0 && thisifindex != ifindex) 1031 continue; 1032 1033 /* Filter on address family. */ 1034 pgsa = (sockunion_t *)ifma->ifma_addr; 1035 if (af != 0 && pgsa->sa.sa_family != af) 1036 continue; 1037 1038 strlcpy(thisifname, link_ntoa(&psa->sdl), IFNAMSIZ); 1039 pcolon = strchr(thisifname, ':'); 1040 if (pcolon) 1041 *pcolon = '\0'; 1042 1043 /* Only print the banner for the first ifmaddrs entry. */ 1044 if (lastifindex == 0 || lastifindex != thisifindex) { 1045 lastifindex = thisifindex; 1046 fprintf(stdout, "%s:\n", thisifname); 1047 } 1048 1049 /* 1050 * Currently, multicast joins only take place on the 1051 * primary IPv4 address, and only on the link-local IPv6 1052 * address, as per IGMPv2/3 and MLDv1/2 semantics. 1053 * Therefore, we only look up the primary address on 1054 * the first pass. 1055 */ 1056 pifasa = NULL; 1057 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 1058 if ((strcmp(ifa->ifa_name, thisifname) != 0) || 1059 (ifa->ifa_addr == NULL) || 1060 (ifa->ifa_addr->sa_family != pgsa->sa.sa_family)) 1061 continue; 1062 /* 1063 * For AF_INET6 only the link-local address should 1064 * be returned. If built without IPv6 support, 1065 * skip this address entirely. 1066 */ 1067 pifasa = (sockunion_t *)ifa->ifa_addr; 1068 if (pifasa->sa.sa_family == AF_INET6 1069 #ifdef INET6 1070 && !IN6_IS_ADDR_LINKLOCAL(&pifasa->sin6.sin6_addr) 1071 #endif 1072 ) { 1073 pifasa = NULL; 1074 continue; 1075 } 1076 break; 1077 } 1078 if (pifasa == NULL) 1079 continue; /* primary address not found */ 1080 1081 if (!vflag && pifasa->sa.sa_family == AF_LINK) 1082 continue; 1083 1084 /* Parse and print primary address, if not already printed. */ 1085 if (lastifasa.ss.ss_family == AF_UNSPEC || 1086 ((lastifasa.ss.ss_family == AF_LINK && 1087 !sa_dl_equal(&lastifasa.sa, &pifasa->sa)) || 1088 !sa_equal(&lastifasa.sa, &pifasa->sa))) { 1089 1090 switch (pifasa->sa.sa_family) { 1091 case AF_INET: 1092 pafname = "inet"; 1093 break; 1094 case AF_INET6: 1095 pafname = "inet6"; 1096 break; 1097 case AF_LINK: 1098 pafname = "link"; 1099 break; 1100 default: 1101 pafname = "unknown"; 1102 break; 1103 } 1104 1105 switch (pifasa->sa.sa_family) { 1106 case AF_INET6: 1107 #ifdef INET6 1108 { 1109 const char *p = 1110 inet6_n2a(&pifasa->sin6.sin6_addr, 1111 pifasa->sin6.sin6_scope_id); 1112 strlcpy(addrbuf, p, sizeof(addrbuf)); 1113 break; 1114 } 1115 #else 1116 /* FALLTHROUGH */ 1117 #endif 1118 case AF_INET: 1119 case AF_LINK: 1120 error = getnameinfo(&pifasa->sa, 1121 pifasa->sa.sa_len, 1122 addrbuf, sizeof(addrbuf), NULL, 0, 1123 NI_NUMERICHOST); 1124 if (error) 1125 perror("getnameinfo"); 1126 break; 1127 default: 1128 addrbuf[0] = '\0'; 1129 break; 1130 } 1131 1132 fprintf(stdout, "\t%s %s\n", pafname, addrbuf); 1133 #ifdef INET 1134 /* 1135 * Print per-link IGMP information, if available. 1136 */ 1137 if (pifasa->sa.sa_family == AF_INET) { 1138 struct igmp_ifinfo igi; 1139 size_t mibsize, len; 1140 int mib[5]; 1141 1142 mibsize = sizeof(mib) / sizeof(mib[0]); 1143 if (sysctlnametomib("net.inet.igmp.ifinfo", 1144 mib, &mibsize) == -1) { 1145 perror("sysctlnametomib"); 1146 goto next_ifnet; 1147 } 1148 mib[mibsize] = thisifindex; 1149 len = sizeof(struct igmp_ifinfo); 1150 if (sysctl(mib, mibsize + 1, &igi, &len, NULL, 1151 0) == -1) { 1152 perror("sysctl net.inet.igmp.ifinfo"); 1153 goto next_ifnet; 1154 } 1155 in_ifinfo(&igi); 1156 } 1157 #endif /* INET */ 1158 #ifdef INET6 1159 /* 1160 * Print per-link MLD information, if available. 1161 */ 1162 if (pifasa->sa.sa_family == AF_INET6) { 1163 struct mld_ifinfo mli; 1164 size_t mibsize, len; 1165 int mib[5]; 1166 1167 mibsize = sizeof(mib) / sizeof(mib[0]); 1168 if (sysctlnametomib("net.inet6.mld.ifinfo", 1169 mib, &mibsize) == -1) { 1170 perror("sysctlnametomib"); 1171 goto next_ifnet; 1172 } 1173 mib[mibsize] = thisifindex; 1174 len = sizeof(struct mld_ifinfo); 1175 if (sysctl(mib, mibsize + 1, &mli, &len, NULL, 1176 0) == -1) { 1177 perror("sysctl net.inet6.mld.ifinfo"); 1178 goto next_ifnet; 1179 } 1180 in6_ifinfo(&mli); 1181 } 1182 #endif /* INET6 */ 1183 #if defined(INET) || defined(INET6) 1184 next_ifnet: 1185 #endif 1186 lastifasa = *pifasa; 1187 } 1188 1189 /* Print this group address. */ 1190 #ifdef INET6 1191 if (pgsa->sa.sa_family == AF_INET6) { 1192 const char *p = inet6_n2a(&pgsa->sin6.sin6_addr, 1193 pgsa->sin6.sin6_scope_id); 1194 strlcpy(addrbuf, p, sizeof(addrbuf)); 1195 } else 1196 #endif 1197 { 1198 error = getnameinfo(&pgsa->sa, pgsa->sa.sa_len, 1199 addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST); 1200 if (error) 1201 perror("getnameinfo"); 1202 } 1203 1204 fprintf(stdout, "\t\tgroup %s", addrbuf); 1205 #ifdef INET 1206 if (pgsa->sa.sa_family == AF_INET) { 1207 inm_print_sources_sysctl(thisifindex, 1208 pgsa->sin.sin_addr); 1209 } 1210 #endif 1211 #ifdef INET6 1212 if (pgsa->sa.sa_family == AF_INET6) { 1213 in6m_print_sources_sysctl(thisifindex, 1214 &pgsa->sin6.sin6_addr); 1215 } 1216 #endif 1217 fprintf(stdout, "\n"); 1218 1219 /* Link-layer mapping, if present. */ 1220 pllsa = (sockunion_t *)ifma->ifma_lladdr; 1221 if (pllsa != NULL) { 1222 error = getnameinfo(&pllsa->sa, pllsa->sa.sa_len, 1223 addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST); 1224 fprintf(stdout, "\t\t\tmcast-macaddr %s\n", addrbuf); 1225 } 1226 } 1227 out: 1228 if (ifmap != NULL) 1229 freeifmaddrs(ifmap); 1230 if (ifap != NULL) 1231 freeifaddrs(ifap); 1232 1233 return (error); 1234 } 1235