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
 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 in6_ifinfo(struct mld_ifinfo *mli)
 444 {
 445
 446         printf("\t");
 447         switch (mli->mli_version) {
 448         case MLD_VERSION_1:
 449         case MLD_VERSION_2:
 450                 printf("mldv%d", mli->mli_version);
 451                 break;
 452         default:
 453                 printf("mldv?(%d)", mli->mli_version);
 454                 break;
 455         }
 456         printb(" flags", mli->mli_flags, "\020\1SILENT");
 457         if (mli->mli_version == MLD_VERSION_2) {
 458                 printf(" rv %u qi %u qri %u uri %u",
 459                     mli->mli_rv, mli->mli_qi, mli->mli_qri, mli->mli_uri);
 460         }
 461         if (vflag >= 2) {
 462                 printf(" v1timer %u v2timer %u", mli->mli_v1_timer,
 463                    mli->mli_v2_timer);
 464         }
 465         printf("\n");
 466 }
 467
 468 static void
 469 if6_addrlist(struct ifaddr *ifap)
 470 {
 471         struct ifnet ifnet;
 472         struct ifaddr ifa;
 473         struct sockaddr sa;
 474         struct in6_ifaddr if6a;
 475         struct ifaddr *ifap0;
 476
 477         if (af && af != AF_INET6)
 478                 return;
 479         ifap0 = ifap;
 480         while (ifap) {
 481                 KREAD(ifap, &ifa, struct ifaddr);
 482                 if (ifa.ifa_addr == NULL)
 483                         goto nextifap;
 484                 KREAD(ifa.ifa_addr, &sa, struct sockaddr);
 485                 if (sa.sa_family != PF_INET6)
 486                         goto nextifap;
 487                 KREAD(ifap, &if6a, struct in6_ifaddr);
 488                 printf("\tinet6 %s\n", inet6_n2a(&if6a.ia_addr.sin6_addr));
 489                 /*
 490                  * Print per-link MLD information, if available.
 491                  */
 492                 if (ifa.ifa_ifp != NULL) {
 493                         struct in6_ifextra ie;
 494                         struct mld_ifinfo mli;
 495
 496                         KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
 497                         KREAD(ifnet.if_afdata[AF_INET6], &ie,
 498                             struct in6_ifextra);
 499                         if (ie.mld_ifinfo != NULL) {
 500                                 KREAD(ie.mld_ifinfo, &mli, struct mld_ifinfo);
 501                                 in6_ifinfo(&mli);
 502                         }
 503                 }
 504         nextifap:
 505                 ifap = ifa.ifa_link.tqe_next;
 506         }
 507         if (ifap0) {
 508                 struct ifnet ifnet;
 509                 struct ifmultiaddr ifm, *ifmp = 0;
 510                 struct sockaddr_dl sdl;
 511
 512                 KREAD(ifap0, &ifa, struct ifaddr);
 513                 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
 514                 if (TAILQ_FIRST(&ifnet.if_multiaddrs))
 515                         ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs);
 516                 while (ifmp) {
 517                         KREAD(ifmp, &ifm, struct ifmultiaddr);
 518                         if (ifm.ifma_addr == NULL)
 519                                 goto nextmulti;
 520                         KREAD(ifm.ifma_addr, &sa, struct sockaddr);
 521                         if (sa.sa_family != AF_INET6)
 522                                 goto nextmulti;
 523                         (void)in6_multientry((struct in6_multi *)
 524                                              ifm.ifma_protospec);
 525                         if (ifm.ifma_lladdr == 0)
 526                                 goto nextmulti;
 527                         KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl);
 528                         printf("\t\t\tmcast-macaddr %s refcnt %d\n",
 529                                ether_ntoa((struct ether_addr *)LLADDR(&sdl)),
 530                                ifm.ifma_refcount);
 531                     nextmulti:
 532                         ifmp = TAILQ_NEXT(&ifm, ifma_link);
 533                 }
 534         }
 535 }
 536
 537 static struct in6_multi *
 538 in6_multientry(struct in6_multi *mc)
 539 {
 540         struct in6_multi multi;
 541
 542         KREAD(mc, &multi, struct in6_multi);
 543         printf("\t\tgroup %s", inet6_n2a(&multi.in6m_addr));
 544         printf(" refcnt %u\n", multi.in6m_refcount);
 545
 546         return (multi.in6m_entry.le_next);
 547 }
 548
 549 #endif /* INET6 */
 550
 551 #ifdef INET
 552
 553 static void
 554 if_addrlist(struct ifaddr *ifap)
 555 {
 556         struct ifaddr ifa;
 557         struct ifnet ifnet;
 558         struct sockaddr sa;
 559         struct in_ifaddr ia;
 560         struct ifaddr *ifap0;
 561
 562         if (af && af != AF_INET)
 563                 return;
 564         ifap0 = ifap;
 565         while (ifap) {
 566                 KREAD(ifap, &ifa, struct ifaddr);
 567                 if (ifa.ifa_addr == NULL)
 568                         goto nextifap;
 569                 KREAD(ifa.ifa_addr, &sa, struct sockaddr);
 570                 if (sa.sa_family != PF_INET)
 571                         goto nextifap;
 572                 KREAD(ifap, &ia, struct in_ifaddr);
 573                 printf("\tinet %s\n", inet_ntoa(ia.ia_addr.sin_addr));
 574                 /*
 575                  * Print per-link IGMP information, if available.
 576                  */
 577                 if (ifa.ifa_ifp != NULL) {
 578                         struct in_ifinfo ii;
 579                         struct igmp_ifinfo igi;
 580
 581                         KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
 582                         KREAD(ifnet.if_afdata[AF_INET], &ii, struct in_ifinfo);
 583                         if (ii.ii_igmp != NULL) {
 584                                 KREAD(ii.ii_igmp, &igi, struct igmp_ifinfo);
 585                                 in_ifinfo(&igi);
 586                         }
 587                 }
 588         nextifap:
 589                 ifap = ifa.ifa_link.tqe_next;
 590         }
 591         if (ifap0) {
 592                 struct ifmultiaddr ifm, *ifmp = 0;
 593                 struct sockaddr_dl sdl;
 594
 595                 KREAD(ifap0, &ifa, struct ifaddr);
 596                 KREAD(ifa.ifa_ifp, &ifnet, struct ifnet);
 597                 if (TAILQ_FIRST(&ifnet.if_multiaddrs))
 598                         ifmp = TAILQ_FIRST(&ifnet.if_multiaddrs);
 599                 while (ifmp) {
 600                         KREAD(ifmp, &ifm, struct ifmultiaddr);
 601                         if (ifm.ifma_addr == NULL)
 602                                 goto nextmulti;
 603                         KREAD(ifm.ifma_addr, &sa, struct sockaddr);
 604                         if (sa.sa_family != AF_INET)
 605                                 goto nextmulti;
 606                         (void)in_multientry((struct in_multi *)
 607                                             ifm.ifma_protospec);
 608                         if (ifm.ifma_lladdr == 0)
 609                                 goto nextmulti;
 610                         KREAD(ifm.ifma_lladdr, &sdl, struct sockaddr_dl);
 611                         printf("\t\t\tmcast-macaddr %s refcnt %d\n",
 612                                ether_ntoa((struct ether_addr *)LLADDR(&sdl)),
 613                                ifm.ifma_refcount);
 614                     nextmulti:
 615                         ifmp = TAILQ_NEXT(&ifm, ifma_link);
 616                 }
 617         }
 618 }
 619
 620 static const char *inm_states[] = {
 621         "not-member",
 622         "silent",
 623         "idle",
 624         "lazy",
 625         "sleeping",
 626         "awakening",
 627         "query-pending",
 628         "sg-query-pending",
 629         "leaving"
 630 };
 631
 632 static const char *
 633 inm_state(u_int state)
 634 {
 635
 636         if (state >= IGMP_NOT_MEMBER && state <= IGMP_LEAVING_MEMBER)
 637                 return (inm_states[state]);
 638         return (NULL);
 639 }
 640
 641 #if 0
 642 static struct ip_msource *
 643 ims_min_kvm(struct in_multi *pinm)
 644 {
 645         struct ip_msource ims0;
 646         struct ip_msource *tmp, *parent;
 647
 648         parent = NULL;
 649         tmp = RB_ROOT(&pinm->inm_srcs);
 650         while (tmp) {
 651                 parent = tmp;
 652                 KREAD(tmp, &ims0, struct ip_msource);
 653                 tmp = RB_LEFT(&ims0, ims_link);
 654         }
 655         return (parent); /* kva */
 656 }
 657
 658 /* XXX This routine is buggy. See RB_NEXT in sys/tree.h. */
 659 static struct ip_msource *
 660 ims_next_kvm(struct ip_msource *ims)
 661 {
 662         struct ip_msource ims0, ims1;
 663         struct ip_msource *tmp;
 664
 665         KREAD(ims, &ims0, struct ip_msource);
 666         if (RB_RIGHT(&ims0, ims_link)) {
 667                 ims = RB_RIGHT(&ims0, ims_link);
 668                 KREAD(ims, &ims1, struct ip_msource);
 669                 while ((tmp = RB_LEFT(&ims1, ims_link))) {
 670                         KREAD(tmp, &ims0, struct ip_msource);
 671                         ims = RB_LEFT(&ims0, ims_link);
 672                 }
 673         } else {
 674                 tmp = RB_PARENT(&ims0, ims_link);
 675                 if (tmp) {
 676                         KREAD(tmp, &ims1, struct ip_msource);
 677                         if (ims == RB_LEFT(&ims1, ims_link))
 678                                 ims = tmp;
 679                 } else {
 680                         while ((tmp = RB_PARENT(&ims0, ims_link))) {
 681                                 KREAD(tmp, &ims1, struct ip_msource);
 682                                 if (ims == RB_RIGHT(&ims1, ims_link)) {
 683                                         ims = tmp;
 684                                         KREAD(ims, &ims0, struct ip_msource);
 685                                 } else
 686                                         break;
 687                         }
 688                         ims = RB_PARENT(&ims0, ims_link);
 689                 }
 690         }
 691         return (ims); /* kva */
 692 }
 693
 694 static void
 695 inm_print_sources_kvm(struct in_multi *pinm)
 696 {
 697         struct ip_msource ims0;
 698         struct ip_msource *ims;
 699         struct in_addr src;
 700         int cnt;
 701         uint8_t fmode;
 702
 703         cnt = 0;
 704         fmode = pinm->inm_st[1].iss_fmode;
 705         if (fmode == MCAST_UNDEFINED)
 706                 return;
 707         for (ims = ims_min_kvm(pinm); ims != NULL; ims = ims_next_kvm(ims)) {
 708                 if (cnt == 0)
 709                         printf(" srcs ");
 710                 KREAD(ims, &ims0, struct ip_msource);
 711                 /* Only print sources in-mode at t1. */
 712                 if (fmode != ims_get_mode(pinm, ims, 1))
 713                         continue;
 714                 src.s_addr = htonl(ims0.ims_haddr);
 715                 printf("%s%s", (cnt++ == 0 ? "" : ","), inet_ntoa(src));
 716         }
 717 }
 718 #endif
 719
 720 static struct in_multi *
 721 in_multientry(struct in_multi *pinm)
 722 {
 723         struct in_multi inm;
 724         const char *state, *mode;
 725
 726         KREAD(pinm, &inm, struct in_multi);
 727         printf("\t\tgroup %s", inet_ntoa(inm.inm_addr));
 728         printf(" refcnt %u", inm.inm_refcount);
 729
 730         state = inm_state(inm.inm_state);
 731         if (state)
 732                 printf(" state %s", state);
 733         else
 734                 printf(" state (%d)", inm.inm_state);
 735
 736         mode = inm_mode(inm.inm_st[1].iss_fmode);
 737         if (mode)
 738                 printf(" mode %s", mode);
 739         else
 740                 printf(" mode (%d)", inm.inm_st[1].iss_fmode);
 741
 742         if (vflag >= 2) {
 743                 printf(" asm %u ex %u in %u rec %u",
 744                     (u_int)inm.inm_st[1].iss_asm,
 745                     (u_int)inm.inm_st[1].iss_ex,
 746                     (u_int)inm.inm_st[1].iss_in,
 747                     (u_int)inm.inm_st[1].iss_rec);
 748         }
 749
 750 #if 0
 751         /* Buggy. */
 752         if (vflag)
 753                 inm_print_sources_kvm(&inm);
 754 #endif
 755
 756         printf("\n");
 757         return (NULL);
 758 }
 759
 760 #endif /* INET */
 761
 762 #endif /* WITH_KVM */
 763
 764 #ifdef INET6
 765 static const char *
 766 inet6_n2a(struct in6_addr *p)
 767 {
 768         static char buf[NI_MAXHOST];
 769         struct sockaddr_in6 sin6;
 770         u_int32_t scopeid;
 771         const int niflags = NI_NUMERICHOST;
 772
 773         memset(&sin6, 0, sizeof(sin6));
 774         sin6.sin6_family = AF_INET6;
 775         sin6.sin6_len = sizeof(struct sockaddr_in6);
 776         sin6.sin6_addr = *p;
 777         if (IN6_IS_ADDR_LINKLOCAL(p) || IN6_IS_ADDR_MC_LINKLOCAL(p) ||
 778             IN6_IS_ADDR_MC_NODELOCAL(p)) {
 779                 scopeid = ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 780                 if (scopeid) {
 781                         sin6.sin6_scope_id = scopeid;
 782                         sin6.sin6_addr.s6_addr[2] = 0;
 783                         sin6.sin6_addr.s6_addr[3] = 0;
 784                 }
 785         }
 786         if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 787             buf, sizeof(buf), NULL, 0, niflags) == 0) {
 788                 return (buf);
 789         } else {
 790                 return ("(invalid)");
 791         }
 792 }
 793 #endif /* INET6 */
 794
 795 #ifdef INET
 796 /*
 797  * Retrieve per-group source filter mode and lists via sysctl.
 798  */
 799 static void
 800 inm_print_sources_sysctl(uint32_t ifindex, struct in_addr gina)
 801 {
 802 #define MAX_SYSCTL_TRY  5
 803         int mib[7];
 804         int ntry = 0;
 805         size_t mibsize;
 806         size_t len;
 807         size_t needed;
 808         size_t cnt;
 809         int i;
 810         char *buf;
 811         struct in_addr *pina;
 812         uint32_t *p;
 813         uint32_t fmode;
 814         const char *modestr;
 815
 816         mibsize = sizeof(mib) / sizeof(mib[0]);
 817         if (sysctlnametomib("net.inet.ip.mcast.filters", mib, &mibsize) == -1) {
 818                 perror("sysctlnametomib");
 819                 return;
 820         }
 821
 822         needed = 0;
 823         mib[5] = ifindex;
 824         mib[6] = gina.s_addr;   /* 32 bits wide */
 825         mibsize = sizeof(mib) / sizeof(mib[0]);
 826         do {
 827                 if (sysctl(mib, mibsize, NULL, &needed, NULL, 0) == -1) {
 828                         perror("sysctl net.inet.ip.mcast.filters");
 829                         return;
 830                 }
 831                 if ((buf = malloc(needed)) == NULL) {
 832                         perror("malloc");
 833                         return;
 834                 }
 835                 if (sysctl(mib, mibsize, buf, &needed, NULL, 0) == -1) {
 836                         if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) {
 837                                 perror("sysctl");
 838                                 goto out_free;
 839                         }
 840                         free(buf);
 841                         buf = NULL;
 842                 }
 843         } while (buf == NULL);
 844
 845         len = needed;
 846         if (len < sizeof(uint32_t)) {
 847                 perror("sysctl");
 848                 goto out_free;
 849         }
 850
 851         p = (uint32_t *)buf;
 852         fmode = *p++;
 853         len -= sizeof(uint32_t);
 854
 855         modestr = inm_mode(fmode);
 856         if (modestr)
 857                 printf(" mode %s", modestr);
 858         else
 859                 printf(" mode (%u)", fmode);
 860
 861         if (vflag == 0)
 862                 goto out_free;
 863
 864         cnt = len / sizeof(struct in_addr);
 865         pina = (struct in_addr *)p;
 866
 867         for (i = 0; i < cnt; i++) {
 868                 if (i == 0)
 869                         printf(" srcs ");
 870                 fprintf(stdout, "%s%s", (i == 0 ? "" : ","),
 871                     inet_ntoa(*pina++));
 872                 len -= sizeof(struct in_addr);
 873         }
 874         if (len > 0) {
 875                 fprintf(stderr, "warning: %u trailing bytes from %s\n",
 876                     (unsigned int)len, "net.inet.ip.mcast.filters");
 877         }
 878
 879 out_free:
 880         free(buf);
 881 #undef  MAX_SYSCTL_TRY
 882 }
 883
 884 #endif /* INET */
 885
 886 #ifdef INET6
 887 /*
 888  * Retrieve MLD per-group source filter mode and lists via sysctl.
 889  *
 890  * Note: The 128-bit IPv6 group addres needs to be segmented into
 891  * 32-bit pieces for marshaling to sysctl. So the MIB name ends
 892  * up looking like this:
 893  *  a.b.c.d.e.ifindex.g[0].g[1].g[2].g[3]
 894  * Assumes that pgroup originated from the kernel, so its components
 895  * are already in network-byte order.
 896  */
 897 static void
 898 in6m_print_sources_sysctl(uint32_t ifindex, struct in6_addr *pgroup)
 899 {
 900 #define MAX_SYSCTL_TRY  5
 901         char addrbuf[INET6_ADDRSTRLEN];
 902         int mib[10];
 903         int ntry = 0;
 904         int *pi;
 905         size_t mibsize;
 906         size_t len;
 907         size_t needed;
 908         size_t cnt;
 909         int i;
 910         char *buf;
 911         struct in6_addr *pina;
 912         uint32_t *p;
 913         uint32_t fmode;
 914         const char *modestr;
 915
 916         mibsize = sizeof(mib) / sizeof(mib[0]);
 917         if (sysctlnametomib("net.inet6.ip6.mcast.filters", mib,
 918             &mibsize) == -1) {
 919                 perror("sysctlnametomib");
 920                 return;
 921         }
 922
 923         needed = 0;
 924         mib[5] = ifindex;
 925         pi = (int *)pgroup;
 926         for (i = 0; i < 4; i++)
 927                 mib[6 + i] = *pi++;
 928
 929         mibsize = sizeof(mib) / sizeof(mib[0]);
 930         do {
 931                 if (sysctl(mib, mibsize, NULL, &needed, NULL, 0) == -1) {
 932                         perror("sysctl net.inet6.ip6.mcast.filters");
 933                         return;
 934                 }
 935                 if ((buf = malloc(needed)) == NULL) {
 936                         perror("malloc");
 937                         return;
 938                 }
 939                 if (sysctl(mib, mibsize, buf, &needed, NULL, 0) == -1) {
 940                         if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) {
 941                                 perror("sysctl");
 942                                 goto out_free;
 943                         }
 944                         free(buf);
 945                         buf = NULL;
 946                 }
 947         } while (buf == NULL);
 948
 949         len = needed;
 950         if (len < sizeof(uint32_t)) {
 951                 perror("sysctl");
 952                 goto out_free;
 953         }
 954
 955         p = (uint32_t *)buf;
 956         fmode = *p++;
 957         len -= sizeof(uint32_t);
 958
 959         modestr = inm_mode(fmode);
 960         if (modestr)
 961                 printf(" mode %s", modestr);
 962         else
 963                 printf(" mode (%u)", fmode);
 964
 965         if (vflag == 0)
 966                 goto out_free;
 967
 968         cnt = len / sizeof(struct in6_addr);
 969         pina = (struct in6_addr *)p;
 970
 971         for (i = 0; i < cnt; i++) {
 972                 if (i == 0)
 973                         printf(" srcs ");
 974                 inet_ntop(AF_INET6, (const char *)pina++, addrbuf,
 975                     INET6_ADDRSTRLEN);
 976                 fprintf(stdout, "%s%s", (i == 0 ? "" : ","), addrbuf);
 977                 len -= sizeof(struct in6_addr);
 978         }
 979         if (len > 0) {
 980                 fprintf(stderr, "warning: %u trailing bytes from %s\n",
 981                     (unsigned int)len, "net.inet6.ip6.mcast.filters");
 982         }
 983
 984 out_free:
 985         free(buf);
 986 #undef  MAX_SYSCTL_TRY
 987 }
 988 #endif /* INET6 */
 989
 990 static int
 991 ifmcstat_getifmaddrs(void)
 992 {
 993         char                     thisifname[IFNAMSIZ];
 994         char                     addrbuf[NI_MAXHOST];
 995         struct ifaddrs          *ifap, *ifa;
 996         struct ifmaddrs         *ifmap, *ifma;
 997         sockunion_t              lastifasa;
 998         sockunion_t             *psa, *pgsa, *pllsa, *pifasa;
 999         char                    *pcolon;
1000         char                    *pafname;
1001         uint32_t                 lastifindex, thisifindex;
1002         int                      error;
1003
1004         error = 0;
1005         ifap = NULL;
1006         ifmap = NULL;
1007         lastifindex = 0;
1008         thisifindex = 0;
1009         lastifasa.ss.ss_family = AF_UNSPEC;
1010
1011         if (getifaddrs(&ifap) != 0) {
1012                 warn("getifmaddrs");
1013                 return (-1);
1014         }
1015
1016         if (getifmaddrs(&ifmap) != 0) {
1017                 warn("getifmaddrs");
1018                 error = -1;
1019                 goto out;
1020         }
1021
1022         for (ifma = ifmap; ifma; ifma = ifma->ifma_next) {
1023                 error = 0;
1024                 if (ifma->ifma_name == NULL || ifma->ifma_addr == NULL)
1025                         continue;
1026
1027                 psa = (sockunion_t *)ifma->ifma_name;
1028                 if (psa->sa.sa_family != AF_LINK) {
1029                         fprintf(stderr,
1030                             "WARNING: Kernel returned invalid data.\n");
1031                         error = -1;
1032                         break;
1033                 }
1034
1035                 /* Filter on interface name. */
1036                 thisifindex = psa->sdl.sdl_index;
1037                 if (ifindex != 0 && thisifindex != ifindex)
1038                         continue;
1039
1040                 /* Filter on address family. */
1041                 pgsa = (sockunion_t *)ifma->ifma_addr;
1042                 if (af != 0 && pgsa->sa.sa_family != af)
1043                         continue;
1044
1045                 strlcpy(thisifname, link_ntoa(&psa->sdl), IFNAMSIZ);
1046                 pcolon = strchr(thisifname, ':');
1047                 if (pcolon)
1048                         *pcolon = '\0';
1049
1050                 /* Only print the banner for the first ifmaddrs entry. */
1051                 if (lastifindex == 0 || lastifindex != thisifindex) {
1052                         lastifindex = thisifindex;
1053                         fprintf(stdout, "%s:\n", thisifname);
1054                 }
1055
1056                 /*
1057                  * Currently, multicast joins only take place on the
1058                  * primary IPv4 address, and only on the link-local IPv6
1059                  * address, as per IGMPv2/3 and MLDv1/2 semantics.
1060                  * Therefore, we only look up the primary address on
1061                  * the first pass.
1062                  */
1063                 pifasa = NULL;
1064                 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1065                         if ((strcmp(ifa->ifa_name, thisifname) != 0) ||
1066                             (ifa->ifa_addr == NULL) ||
1067                             (ifa->ifa_addr->sa_family != pgsa->sa.sa_family))
1068                                 continue;
1069                         /*
1070                          * For AF_INET6 only the link-local address should
1071                          * be returned. If built without IPv6 support,
1072                          * skip this address entirely.
1073                          */
1074                         pifasa = (sockunion_t *)ifa->ifa_addr;
1075                         if (pifasa->sa.sa_family == AF_INET6
1076 #ifdef INET6
1077                             && !IN6_IS_ADDR_LINKLOCAL(&pifasa->sin6.sin6_addr)
1078 #endif
1079                         ) {
1080                                 pifasa = NULL;
1081                                 continue;
1082                         }
1083                         break;
1084                 }
1085                 if (pifasa == NULL)
1086                         continue;       /* primary address not found */
1087
1088                 if (!vflag && pifasa->sa.sa_family == AF_LINK)
1089                         continue;
1090
1091                 /* Parse and print primary address, if not already printed. */
1092                 if (lastifasa.ss.ss_family == AF_UNSPEC ||
1093                     ((lastifasa.ss.ss_family == AF_LINK &&
1094                       !sa_dl_equal(&lastifasa.sa, &pifasa->sa)) ||
1095                      !sa_equal(&lastifasa.sa, &pifasa->sa))) {
1096
1097                         switch (pifasa->sa.sa_family) {
1098                         case AF_INET:
1099                                 pafname = "inet";
1100                                 break;
1101                         case AF_INET6:
1102                                 pafname = "inet6";
1103                                 break;
1104                         case AF_LINK:
1105                                 pafname = "link";
1106                                 break;
1107                         default:
1108                                 pafname = "unknown";
1109                                 break;
1110                         }
1111
1112                         switch (pifasa->sa.sa_family) {
1113                         case AF_INET6:
1114 #ifdef INET6
1115                         {
1116                                 const char *p =
1117                                     inet6_n2a(&pifasa->sin6.sin6_addr);
1118                                 strlcpy(addrbuf, p, sizeof(addrbuf));
1119                                 break;
1120                         }
1121 #else
1122                         /* FALLTHROUGH */
1123 #endif
1124                         case AF_INET:
1125                         case AF_LINK:
1126                                 error = getnameinfo(&pifasa->sa,
1127                                     pifasa->sa.sa_len,
1128                                     addrbuf, sizeof(addrbuf), NULL, 0,
1129                                     NI_NUMERICHOST);
1130                                 if (error)
1131                                         perror("getnameinfo");
1132                                 break;
1133                         default:
1134                                 addrbuf[0] = '\0';
1135                                 break;
1136                         }
1137
1138                         fprintf(stdout, "\t%s %s\n", pafname, addrbuf);
1139 #ifdef INET
1140                         /*
1141                          * Print per-link IGMP information, if available.
1142                          */
1143                         if (pifasa->sa.sa_family == AF_INET) {
1144                                 struct igmp_ifinfo igi;
1145                                 size_t mibsize, len;
1146                                 int mib[5];
1147
1148                                 mibsize = sizeof(mib) / sizeof(mib[0]);
1149                                 if (sysctlnametomib("net.inet.igmp.ifinfo",
1150                                     mib, &mibsize) == -1) {
1151                                         perror("sysctlnametomib");
1152                                         goto next_ifnet;
1153                                 }
1154                                 mib[mibsize] = thisifindex;
1155                                 len = sizeof(struct igmp_ifinfo);
1156                                 if (sysctl(mib, mibsize + 1, &igi, &len, NULL,
1157                                     0) == -1) {
1158                                         perror("sysctl net.inet.igmp.ifinfo");
1159                                         goto next_ifnet;
1160                                 }
1161                                 in_ifinfo(&igi);
1162                         }
1163 #endif /* INET */
1164 #ifdef INET6
1165                         /*
1166                          * Print per-link MLD information, if available.
1167                          */
1168                         if (pifasa->sa.sa_family == AF_INET6) {
1169                                 struct mld_ifinfo mli;
1170                                 size_t mibsize, len;
1171                                 int mib[5];
1172
1173                                 mibsize = sizeof(mib) / sizeof(mib[0]);
1174                                 if (sysctlnametomib("net.inet6.mld.ifinfo",
1175                                     mib, &mibsize) == -1) {
1176                                         perror("sysctlnametomib");
1177                                         goto next_ifnet;
1178                                 }
1179                                 mib[mibsize] = thisifindex;
1180                                 len = sizeof(struct mld_ifinfo);
1181                                 if (sysctl(mib, mibsize + 1, &mli, &len, NULL,
1182                                     0) == -1) {
1183                                         perror("sysctl net.inet6.mld.ifinfo");
1184                                         goto next_ifnet;
1185                                 }
1186                                 in6_ifinfo(&mli);
1187                         }
1188 #endif /* INET6 */
1189 #if defined(INET) || defined(INET6)
1190 next_ifnet:
1191 #endif
1192                         lastifasa = *pifasa;
1193                 }
1194
1195                 /* Print this group address. */
1196 #ifdef INET6
1197                 if (pgsa->sa.sa_family == AF_INET6) {
1198                         const char *p = inet6_n2a(&pgsa->sin6.sin6_addr);
1199                         strlcpy(addrbuf, p, sizeof(addrbuf));
1200                 } else
1201 #endif
1202                 {
1203                         error = getnameinfo(&pgsa->sa, pgsa->sa.sa_len,
1204                             addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST);
1205                         if (error)
1206                                 perror("getnameinfo");
1207                 }
1208
1209                 fprintf(stdout, "\t\tgroup %s", addrbuf);
1210 #ifdef INET
1211                 if (pgsa->sa.sa_family == AF_INET) {
1212                         inm_print_sources_sysctl(thisifindex,
1213                             pgsa->sin.sin_addr);
1214                 }
1215 #endif
1216 #ifdef INET6
1217                 if (pgsa->sa.sa_family == AF_INET6) {
1218                         in6m_print_sources_sysctl(thisifindex,
1219                             &pgsa->sin6.sin6_addr);
1220                 }
1221 #endif
1222                 fprintf(stdout, "\n");
1223
1224                 /* Link-layer mapping, if present. */
1225                 pllsa = (sockunion_t *)ifma->ifma_lladdr;
1226                 if (pllsa != NULL) {
1227                         error = getnameinfo(&pllsa->sa, pllsa->sa.sa_len,
1228                             addrbuf, sizeof(addrbuf), NULL, 0, NI_NUMERICHOST);
1229                         fprintf(stdout, "\t\t\tmcast-macaddr %s\n", addrbuf);
1230                 }
1231         }
1232 out:
1233         if (ifmap != NULL)
1234                 freeifmaddrs(ifmap);
1235         if (ifap != NULL)
1236                 freeifaddrs(ifap);
1237
1238         return (error);
1239 }