usr.sbin/ifmcstat/ifmcstat.c

   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 }