usr.sbin/mtest/mtest.c

   1 /*-
   2  * Copyright (c) 2007-2009 Bruce Simpson.
   3  * Copyright (c) 2000 Wilbert De Graaf.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 /*
  32  * Diagnostic and test utility for multicast sockets.
  33  * XXX: This file currently assumes INET support in the base system.
  34  * TODO: Support embedded KAME Scope ID in IPv6 group addresses.
  35  * TODO: Use IPv4 link-local address when source address selection
  36  * is implemented; use MCAST_JOIN_SOURCE for IPv4.
  37  */
  38
  39 #include <sys/cdefs.h>
  40 __FBSDID("$FreeBSD$");
  41
  42 #include <sys/types.h>
  43 #include <sys/param.h>
  44 #include <sys/errno.h>
  45 #include <sys/socket.h>
  46 #include <sys/time.h>
  47 #include <sys/ioctl.h>
  48
  49 #include <net/if.h>
  50 #include <net/if_dl.h>
  51 #include <net/ethernet.h>
  52 #ifdef INET
  53 #include <netinet/in.h>
  54 #include <netinet/in_systm.h>
  55 #include <netinet/ip.h>
  56 #include <netinet/ip_var.h>
  57 #endif
  58 #ifdef INET6
  59 #include <netinet/in.h>
  60 #include <netinet/ip6.h>
  61 #endif
  62
  63 #include <assert.h>
  64 #include <stdlib.h>
  65 #include <stdio.h>
  66 #include <string.h>
  67 #include <ctype.h>
  68 #include <errno.h>
  69 #include <err.h>
  70 #include <unistd.h>
  71
  72 #include <arpa/inet.h>
  73 #include <netdb.h>
  74 #include <ifaddrs.h>
  75
  76 union sockunion {
  77         struct sockaddr_storage ss;
  78         struct sockaddr         sa;
  79         struct sockaddr_dl      sdl;
  80 #ifdef INET
  81         struct sockaddr_in      sin;
  82 #endif
  83 #ifdef INET6
  84         struct sockaddr_in6     sin6;
  85 #endif
  86 };
  87 typedef union sockunion sockunion_t;
  88
  89 union mrequnion {
  90 #ifdef INET
  91         struct ip_mreq           mr;
  92         struct ip_mreq_source    mrs;
  93 #endif
  94 #ifdef INET6
  95         struct ipv6_mreq         mr6;
  96         struct group_source_req  gr;
  97 #endif
  98 };
  99 typedef union mrequnion mrequnion_t;
 100
 101 #define MAX_ADDRS       20
 102 #define STR_SIZE        20
 103 #define LINE_LENGTH     80
 104
 105 #ifdef INET
 106 static int      __ifindex_to_primary_ip(const uint32_t, struct in_addr *);
 107 #endif
 108 static uint32_t parse_cmd_args(sockunion_t *, sockunion_t *,
 109                     const char *, const char *, const char *);
 110 static void     process_file(char *, int, int);
 111 static void     process_cmd(char*, int, int, FILE *);
 112 static int      su_cmp(const void *, const void *);
 113 static void     usage(void);
 114
 115 /*
 116  * Ordering predicate for qsort().
 117  */
 118 static int
 119 su_cmp(const void *a, const void *b)
 120 {
 121         const sockunion_t       *sua = (const sockunion_t *)a;
 122         const sockunion_t       *sub = (const sockunion_t *)b;
 123
 124         assert(sua->sa.sa_family == sub->sa.sa_family);
 125
 126         switch (sua->sa.sa_family) {
 127 #ifdef INET
 128         case AF_INET:
 129                 return ((int)(sua->sin.sin_addr.s_addr -
 130                     sub->sin.sin_addr.s_addr));
 131                 break;
 132 #endif
 133 #ifdef INET6
 134         case AF_INET6:
 135                 return (memcmp(&sua->sin6.sin6_addr, &sub->sin6.sin6_addr,
 136                     sizeof(struct in6_addr)));
 137                 break;
 138 #endif
 139         default:
 140                 break;
 141         }
 142
 143         assert(sua->sa.sa_len == sub->sa.sa_len);
 144         return (memcmp(sua, sub, sua->sa.sa_len));
 145 }
 146
 147 #ifdef INET
 148 /*
 149  * Internal: Map an interface index to primary IPv4 address.
 150  * This is somewhat inefficient. This is a useful enough operation
 151  * that it probably belongs in the C library.
 152  * Return zero if found, -1 on error, 1 on not found.
 153  */
 154 static int
 155 __ifindex_to_primary_ip(const uint32_t ifindex, struct in_addr *pina)
 156 {
 157         char             ifname[IFNAMSIZ];
 158         struct ifaddrs  *ifa;
 159         struct ifaddrs  *ifaddrs;
 160         sockunion_t     *psu;
 161         int              retval;
 162
 163         assert(ifindex != 0);
 164
 165         retval = -1;
 166         if (if_indextoname(ifindex, ifname) == NULL)
 167                 return (retval);
 168         if (getifaddrs(&ifaddrs) < 0)
 169                 return (retval);
 170
 171         /*
 172          * Find the ifaddr entry corresponding to the interface name,
 173          * and return the first matching IPv4 address.
 174          */
 175         retval = 1;
 176         for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next) {
 177                 if (strcmp(ifa->ifa_name, ifname) != 0)
 178                         continue;
 179                 psu = (sockunion_t *)ifa->ifa_addr;
 180                 if (psu && psu->sa.sa_family == AF_INET) {
 181                         retval = 0;
 182                         memcpy(pina, &psu->sin.sin_addr,
 183                             sizeof(struct in_addr));
 184                         break;
 185                 }
 186         }
 187
 188         if (retval != 0)
 189                 errno = EADDRNOTAVAIL;  /* XXX */
 190
 191         freeifaddrs(ifaddrs);
 192         return (retval);
 193 }
 194 #endif /* INET */
 195
 196 int
 197 main(int argc, char **argv)
 198 {
 199         char     line[LINE_LENGTH];
 200         char    *p;
 201         int      i, s, s6;
 202
 203         s = -1;
 204         s6 = -1;
 205 #ifdef INET
 206         s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 207         if (s == -1 && errno != EAFNOSUPPORT)
 208                 err(1, "can't open IPv4 socket");
 209 #endif
 210 #ifdef INET6
 211         s6 = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
 212         if (s6 == -1 && errno != EAFNOSUPPORT)
 213                 err(1, "can't open IPv6 socket");
 214 #endif
 215         if (s == -1 && s6 == -1)
 216                 errc(1, EPROTONOSUPPORT, "can't open socket");
 217
 218         if (argc < 2) {
 219                 if (isatty(STDIN_FILENO)) {
 220                         printf("multicast membership test program; "
 221                             "enter ? for list of commands\n");
 222                 }
 223                 do {
 224                         if (fgets(line, sizeof(line), stdin) != NULL) {
 225                                 if (line[0] != 'f')
 226                                         process_cmd(line, s, s6, stdin);
 227                                 else {
 228                                         /* Get the filename */
 229                                         for (i = 1; isblank(line[i]); i++);
 230                                         if ((p = (char*)strchr(line, '\n'))
 231                                             != NULL)
 232                                                 *p = '\0';
 233                                         process_file(&line[i], s, s6);
 234                                 }
 235                         }
 236                 } while (!feof(stdin));
 237         } else {
 238                 for (i = 1; i < argc; i++) {
 239                         process_file(argv[i], s, s6);
 240                 }
 241         }
 242
 243         if (s != -1)
 244                 close(s);
 245         if (s6 != -1)
 246                 close(s6);
 247
 248         exit (0);
 249 }
 250
 251 static void
 252 process_file(char *fname, int s, int s6)
 253 {
 254         char line[80];
 255         FILE *fp;
 256         char *lineptr;
 257
 258         fp = fopen(fname, "r");
 259         if (fp == NULL) {
 260                 warn("fopen");
 261                 return;
 262         }
 263
 264         /* Skip comments and empty lines. */
 265         while (fgets(line, sizeof(line), fp) != NULL) {
 266                 lineptr = line;
 267                 while (isblank(*lineptr))
 268                         lineptr++;
 269                 if (*lineptr != '#' && *lineptr != '\n')
 270                         process_cmd(lineptr, s, s6, fp);
 271         }
 272
 273         fclose(fp);
 274 }
 275
 276 /*
 277  * Parse join/leave/allow/block arguments, given:
 278  *  str1: group (as AF_INET or AF_INET6 printable)
 279  *  str2: ifname
 280  *  str3: optional source address (may be NULL).
 281  *   This argument must have the same parsed address family as str1.
 282  * Return the ifindex of ifname, or 0 if any parse element failed.
 283  */
 284 static uint32_t
 285 parse_cmd_args(sockunion_t *psu, sockunion_t *psu2,
 286     const char *str1, const char *str2, const char *str3)
 287 {
 288         struct addrinfo          hints;
 289         struct addrinfo         *res;
 290         uint32_t                 ifindex;
 291         int                      af, error;
 292
 293         assert(psu != NULL);
 294         assert(str1 != NULL);
 295         assert(str2 != NULL);
 296
 297         af = AF_UNSPEC;
 298
 299         ifindex = if_nametoindex(str2);
 300         if (ifindex == 0)
 301                 return (0);
 302
 303         memset(&hints, 0, sizeof(struct addrinfo));
 304         hints.ai_flags = AI_NUMERICHOST;
 305         hints.ai_family = PF_UNSPEC;
 306         hints.ai_socktype = SOCK_DGRAM;
 307
 308         memset(psu, 0, sizeof(sockunion_t));
 309         psu->sa.sa_family = AF_UNSPEC;
 310
 311         error = getaddrinfo(str1, "0", &hints, &res);
 312         if (error) {
 313                 warnx("getaddrinfo: %s", gai_strerror(error));
 314                 return (0);
 315         }
 316         assert(res != NULL);
 317         af = res->ai_family;
 318         memcpy(psu, res->ai_addr, res->ai_addrlen);
 319         freeaddrinfo(res);
 320
 321         /* sscanf() may pass the empty string. */
 322         if (psu2 != NULL && str3 != NULL && *str3 != '\0') {
 323                 memset(psu2, 0, sizeof(sockunion_t));
 324                 psu2->sa.sa_family = AF_UNSPEC;
 325
 326                 /* look for following address family; str3 is *optional*. */
 327                 hints.ai_family = af;
 328                 error = getaddrinfo(str3, "0", &hints, &res);
 329                 if (error) {
 330                         warnx("getaddrinfo: %s", gai_strerror(error));
 331                         ifindex = 0;
 332                 } else {
 333                         if (af != res->ai_family) {
 334                                 errno = EINVAL; /* XXX */
 335                                 ifindex = 0;
 336                         }
 337                         memcpy(psu2, res->ai_addr, res->ai_addrlen);
 338                         freeaddrinfo(res);
 339                 }
 340         }
 341
 342         return (ifindex);
 343 }
 344
 345 static __inline int
 346 af2sock(const int af, int s, int s6)
 347 {
 348
 349 #ifdef INET
 350         if (af == AF_INET)
 351                 return (s);
 352 #endif
 353 #ifdef INET6
 354         if (af == AF_INET6)
 355                 return (s6);
 356 #endif
 357         return (-1);
 358 }
 359
 360 static __inline int
 361 af2socklen(const int af)
 362 {
 363
 364 #ifdef INET
 365         if (af == AF_INET)
 366                 return (sizeof(struct sockaddr_in));
 367 #endif
 368 #ifdef INET6
 369         if (af == AF_INET6)
 370                 return (sizeof(struct sockaddr_in6));
 371 #endif
 372         return (-1);
 373 }
 374
 375 static void
 376 process_cmd(char *cmd, int s, int s6, FILE *fp __unused)
 377 {
 378         char                     str1[STR_SIZE];
 379         char                     str2[STR_SIZE];
 380         char                     str3[STR_SIZE];
 381         mrequnion_t              mr;
 382         sockunion_t              su, su2;
 383         struct ifreq             ifr;
 384         char                    *line;
 385         char                    *toptname;
 386         void                    *optval;
 387         uint32_t                 fmode, ifindex;
 388         socklen_t                optlen;
 389         int                      af, error, f, flags, i, level, n, optname;
 390
 391         af = AF_UNSPEC;
 392         su.sa.sa_family = AF_UNSPEC;
 393         su2.sa.sa_family = AF_UNSPEC;
 394
 395         line = cmd;
 396         while (isblank(*++line))
 397                 ;       /* Skip whitespace. */
 398
 399         switch (*cmd) {
 400         case '?':
 401                 usage();
 402                 break;
 403
 404         case 'q':
 405                 close(s);
 406                 exit(0);
 407
 408         case 's':
 409                 if ((sscanf(line, "%d", &n) != 1) || (n < 1)) {
 410                         printf("-1\n");
 411                         break;
 412                 }
 413                 sleep(n);
 414                 printf("ok\n");
 415                 break;
 416
 417         case 'j':
 418         case 'l':
 419                 str3[0] = '\0';
 420                 toptname = "";
 421                 sscanf(line, "%s %s %s", str1, str2, str3);
 422                 ifindex = parse_cmd_args(&su, &su2, str1, str2, str3);
 423                 if (ifindex == 0) {
 424                         printf("-1\n");
 425                         break;
 426                 }
 427                 af = su.sa.sa_family;
 428 #ifdef INET
 429                 if (af == AF_INET) {
 430                         struct in_addr ina;
 431
 432                         error = __ifindex_to_primary_ip(ifindex, &ina);
 433                         if (error != 0) {
 434                                 warn("primary_ip_lookup %s", str2);
 435                                 printf("-1\n");
 436                                 break;
 437                         }
 438                         level = IPPROTO_IP;
 439
 440                         if (su2.sa.sa_family != AF_UNSPEC) {
 441                                 mr.mrs.imr_multiaddr = su.sin.sin_addr;
 442                                 mr.mrs.imr_sourceaddr = su2.sin.sin_addr;
 443                                 mr.mrs.imr_interface = ina;
 444                                 optname = (*cmd == 'j') ?
 445                                     IP_ADD_SOURCE_MEMBERSHIP :
 446                                     IP_DROP_SOURCE_MEMBERSHIP;
 447                                 toptname = (*cmd == 'j') ?
 448                                     "IP_ADD_SOURCE_MEMBERSHIP" :
 449                                     "IP_DROP_SOURCE_MEMBERSHIP";
 450                                 optval = (void *)&mr.mrs;
 451                                 optlen = sizeof(mr.mrs);
 452                         } else {
 453                                 mr.mr.imr_multiaddr = su.sin.sin_addr;
 454                                 mr.mr.imr_interface = ina;
 455                                 optname = (*cmd == 'j') ?
 456                                     IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP;
 457                                 toptname = (*cmd == 'j') ?
 458                                     "IP_ADD_MEMBERSHIP" : "IP_DROP_MEMBERSHIP";
 459                                 optval = (void *)&mr.mr;
 460                                 optlen = sizeof(mr.mr);
 461                         }
 462                         if (s < 0) {
 463                                 warnc(EPROTONOSUPPORT, "setsockopt %s",
 464                                     toptname);
 465                         } else if (setsockopt(s, level, optname, optval,
 466                             optlen) == 0) {
 467                                 printf("ok\n");
 468                                 break;
 469                         } else {
 470                                 warn("setsockopt %s", toptname);
 471                         }
 472                 }
 473 #ifdef INET6
 474                 else
 475 #endif /* INET with INET6 */
 476 #endif /* INET */
 477 #ifdef INET6
 478                 if (af == AF_INET6) {
 479                         level = IPPROTO_IPV6;
 480                         if (su2.sa.sa_family != AF_UNSPEC) {
 481                                 mr.gr.gsr_interface = ifindex;
 482                                 mr.gr.gsr_group = su.ss;
 483                                 mr.gr.gsr_source = su2.ss;
 484                                 optname = (*cmd == 'j') ?
 485                                     MCAST_JOIN_SOURCE_GROUP:
 486                                     MCAST_LEAVE_SOURCE_GROUP;
 487                                 toptname = (*cmd == 'j') ?
 488                                     "MCAST_JOIN_SOURCE_GROUP":
 489                                     "MCAST_LEAVE_SOURCE_GROUP";
 490                                 optval = (void *)&mr.gr;
 491                                 optlen = sizeof(mr.gr);
 492                         } else {
 493                                 mr.mr6.ipv6mr_multiaddr = su.sin6.sin6_addr;
 494                                 mr.mr6.ipv6mr_interface = ifindex;
 495                                 optname = (*cmd == 'j') ?
 496                                     IPV6_JOIN_GROUP :
 497                                     IPV6_LEAVE_GROUP;
 498                                 toptname = (*cmd == 'j') ?
 499                                     "IPV6_JOIN_GROUP" :
 500                                     "IPV6_LEAVE_GROUP";
 501                                 optval = (void *)&mr.mr6;
 502                                 optlen = sizeof(mr.mr6);
 503                         }
 504                         if (s6 < 0) {
 505                                 warnc(EPROTONOSUPPORT, "setsockopt %s",
 506                                     toptname);
 507                         } else if (setsockopt(s6, level, optname, optval,
 508                             optlen) == 0) {
 509                                 printf("ok\n");
 510                                 break;
 511                         } else {
 512                                 warn("setsockopt %s", toptname);
 513                         }
 514                 }
 515 #endif /* INET6 */
 516                 /* FALLTHROUGH */
 517                 printf("-1\n");
 518                 break;
 519
 520         /*
 521          * Set the socket to include or exclude filter mode, and
 522          * add some sources to the filterlist, using the full-state API.
 523          */
 524         case 'i':
 525         case 'e': {
 526                 sockunion_t      sources[MAX_ADDRS];
 527                 struct addrinfo  hints;
 528                 struct addrinfo *res;
 529                 char            *cp;
 530                 int              af1;
 531
 532                 n = 0;
 533                 fmode = (*cmd == 'i') ? MCAST_INCLUDE : MCAST_EXCLUDE;
 534                 if ((sscanf(line, "%s %s %d", str1, str2, &n)) != 3) {
 535                         printf("-1\n");
 536                         break;
 537                 }
 538
 539                 ifindex = parse_cmd_args(&su, NULL, str1, str2, NULL);
 540                 if (ifindex == 0 || n < 0 || n > MAX_ADDRS) {
 541                         printf("-1\n");
 542                         break;
 543                 }
 544                 af = su.sa.sa_family;
 545                 if (af2sock(af, s, s6) == -1) {
 546                         warnc(EPROTONOSUPPORT, "setsourcefilter");
 547                         break;
 548                 }
 549
 550                 memset(&hints, 0, sizeof(struct addrinfo));
 551                 hints.ai_flags = AI_NUMERICHOST;
 552                 hints.ai_family = af;
 553                 hints.ai_socktype = SOCK_DGRAM;
 554
 555                 for (i = 0; i < n; i++) {
 556                         sockunion_t *psu = (sockunion_t *)&sources[i];
 557                         /*
 558                          * Trim trailing whitespace, as getaddrinfo()
 559                          * can't cope with it.
 560                          */
 561                         fgets(str1, sizeof(str1), fp);
 562                         cp = strchr(str1, '\n');
 563                         if (cp != NULL)
 564                                 *cp = '\0';
 565
 566                         res = NULL;
 567                         error = getaddrinfo(str1, "0", &hints, &res);
 568                         if (error)
 569                                 break;
 570                         assert(res != NULL);
 571
 572                         memset(psu, 0, sizeof(sockunion_t));
 573                         af1 = res->ai_family;
 574                         if (af1 == af)
 575                                 memcpy(psu, res->ai_addr, res->ai_addrlen);
 576                         freeaddrinfo(res);
 577                         if (af1 != af)
 578                                 break;
 579                 }
 580                 if (i < n) {
 581                         if (error)
 582                                 warnx("getaddrinfo: %s", gai_strerror(error));
 583                         printf("-1\n");
 584                         break;
 585                 }
 586                 if (setsourcefilter(af2sock(af, s, s6), ifindex,
 587                     &su.sa, su.sa.sa_len, fmode, n, &sources[0].ss) != 0)
 588                         warn("setsourcefilter");
 589                 else
 590                         printf("ok\n");
 591         } break;
 592
 593         /*
 594          * Allow or block traffic from a source, using the
 595          * delta based api.
 596          */
 597         case 't':
 598         case 'b': {
 599                 str3[0] = '\0';
 600                 toptname = "";
 601                 sscanf(line, "%s %s %s", str1, str2, str3);
 602                 ifindex = parse_cmd_args(&su, &su2, str1, str2, str3);
 603                 if (ifindex == 0 || su2.sa.sa_family == AF_UNSPEC) {
 604                         printf("-1\n");
 605                         break;
 606                 }
 607                 af = su.sa.sa_family;
 608                 if (af2sock(af, s, s6) == -1) {
 609                         warnc(EPROTONOSUPPORT, "getsourcefilter");
 610                         break;
 611                 }
 612
 613                 /* First determine our current filter mode. */
 614                 n = 0;
 615                 if (getsourcefilter(af2sock(af, s, s6), ifindex,
 616                     &su.sa, su.sa.sa_len, &fmode, &n, NULL) != 0) {
 617                         warn("getsourcefilter");
 618                         break;
 619                 }
 620 #ifdef INET
 621                 if (af == AF_INET) {
 622                         struct in_addr ina;
 623
 624                         error = __ifindex_to_primary_ip(ifindex, &ina);
 625                         if (error != 0) {
 626                                 warn("primary_ip_lookup %s", str2);
 627                                 printf("-1\n");
 628                                 break;
 629                         }
 630                         level = IPPROTO_IP;
 631                         optval = (void *)&mr.mrs;
 632                         optlen = sizeof(mr.mrs);
 633                         mr.mrs.imr_multiaddr = su.sin.sin_addr;
 634                         mr.mrs.imr_sourceaddr = su2.sin.sin_addr;
 635                         mr.mrs.imr_interface = ina;
 636                         if (fmode == MCAST_EXCLUDE) {
 637                                 /* Any-source mode socket membership. */
 638                                 optname = (*cmd == 't') ?
 639                                     IP_UNBLOCK_SOURCE :
 640                                     IP_BLOCK_SOURCE;
 641                                 toptname = (*cmd == 't') ?
 642                                     "IP_UNBLOCK_SOURCE" :
 643                                     "IP_BLOCK_SOURCE";
 644                         } else {
 645                                 /* Source-specific mode socket membership. */
 646                                 optname = (*cmd == 't') ?
 647                                     IP_ADD_SOURCE_MEMBERSHIP :
 648                                     IP_DROP_SOURCE_MEMBERSHIP;
 649                                 toptname = (*cmd == 't') ?
 650                                     "IP_ADD_SOURCE_MEMBERSHIP" :
 651                                     "IP_DROP_SOURCE_MEMBERSHIP";
 652                         }
 653                         if (setsockopt(s, level, optname, optval,
 654                             optlen) == 0) {
 655                                 printf("ok\n");
 656                                 break;
 657                         } else {
 658                                 warn("setsockopt %s", toptname);
 659                         }
 660                 }
 661 #ifdef INET6
 662                 else
 663 #endif /* INET with INET6 */
 664 #endif /* INET */
 665 #ifdef INET6
 666                 if (af == AF_INET6) {
 667                         level = IPPROTO_IPV6;
 668                         mr.gr.gsr_interface = ifindex;
 669                         mr.gr.gsr_group = su.ss;
 670                         mr.gr.gsr_source = su2.ss;
 671                         if (fmode == MCAST_EXCLUDE) {
 672                                 /* Any-source mode socket membership. */
 673                                 optname = (*cmd == 't') ?
 674                                     MCAST_UNBLOCK_SOURCE :
 675                                     MCAST_BLOCK_SOURCE;
 676                                 toptname = (*cmd == 't') ?
 677                                     "MCAST_UNBLOCK_SOURCE" :
 678                                     "MCAST_BLOCK_SOURCE";
 679                         } else {
 680                                 /* Source-specific mode socket membership. */
 681                                 optname = (*cmd == 't') ?
 682                                     MCAST_JOIN_SOURCE_GROUP :
 683                                     MCAST_LEAVE_SOURCE_GROUP;
 684                                 toptname = (*cmd == 't') ?
 685                                     "MCAST_JOIN_SOURCE_GROUP":
 686                                     "MCAST_LEAVE_SOURCE_GROUP";
 687                         }
 688                         optval = (void *)&mr.gr;
 689                         optlen = sizeof(mr.gr);
 690                         if (setsockopt(s6, level, optname, optval,
 691                             optlen) == 0) {
 692                                 printf("ok\n");
 693                                 break;
 694                         } else {
 695                                 warn("setsockopt %s", toptname);
 696                         }
 697                 }
 698 #endif /* INET6 */
 699                 /* FALLTHROUGH */
 700                 printf("-1\n");
 701         } break;
 702
 703         case 'g': {
 704                 sockunion_t      sources[MAX_ADDRS];
 705                 char             addrbuf[NI_MAXHOST];
 706                 int              nreqsrc, nsrc;
 707
 708                 if ((sscanf(line, "%s %s %d", str1, str2, &nreqsrc)) != 3) {
 709                         printf("-1\n");
 710                         break;
 711                 }
 712                 ifindex = parse_cmd_args(&su, NULL, str1, str2, NULL);
 713                 if (ifindex == 0 || (n < 0 || n > MAX_ADDRS)) {
 714                         printf("-1\n");
 715                         break;
 716                 }
 717
 718                 af = su.sa.sa_family;
 719                 if (af2sock(af, s, s6) == -1) {
 720                         warnc(EPROTONOSUPPORT, "getsourcefilter");
 721                         break;
 722                 }
 723                 nsrc = nreqsrc;
 724                 if (getsourcefilter(af2sock(af, s, s6), ifindex, &su.sa,
 725                     su.sa.sa_len, &fmode, &nsrc, &sources[0].ss) != 0) {
 726                         warn("getsourcefilter");
 727                         printf("-1\n");
 728                         break;
 729                 }
 730                 printf("%s\n", (fmode == MCAST_INCLUDE) ? "include" :
 731                     "exclude");
 732                 printf("%d\n", nsrc);
 733
 734                 nsrc = MIN(nreqsrc, nsrc);
 735                 fprintf(stderr, "hexdump of sources:\n");
 736                 uint8_t *bp = (uint8_t *)&sources[0];
 737                 for (i = 0; i < (nsrc * sizeof(sources[0])); i++) {
 738                         fprintf(stderr, "%02x", bp[i]);
 739                 }
 740                 fprintf(stderr, "\nend hexdump\n");
 741
 742                 qsort(sources, nsrc, af2socklen(af), su_cmp);
 743                 for (i = 0; i < nsrc; i++) {
 744                         sockunion_t *psu = (sockunion_t *)&sources[i];
 745                         addrbuf[0] = '\0';
 746                         error = getnameinfo(&psu->sa, psu->sa.sa_len,
 747                             addrbuf, sizeof(addrbuf), NULL, 0,
 748                             NI_NUMERICHOST);
 749                         if (error)
 750                                 warnx("getnameinfo: %s", gai_strerror(error));
 751                         else
 752                                 printf("%s\n", addrbuf);
 753                 }
 754                 printf("ok\n");
 755         } break;
 756
 757         /* link-layer stuff follows. */
 758
 759         case 'a':
 760         case 'd': {
 761                 struct sockaddr_dl      *dlp;
 762                 struct ether_addr       *ep;
 763
 764                 memset(&ifr, 0, sizeof(struct ifreq));
 765                 dlp = (struct sockaddr_dl *)&ifr.ifr_addr;
 766                 dlp->sdl_len = sizeof(struct sockaddr_dl);
 767                 dlp->sdl_family = AF_LINK;
 768                 dlp->sdl_index = 0;
 769                 dlp->sdl_nlen = 0;
 770                 dlp->sdl_alen = ETHER_ADDR_LEN;
 771                 dlp->sdl_slen = 0;
 772                 if (sscanf(line, "%s %s", str1, str2) != 2) {
 773                         warnc(EINVAL, "sscanf");
 774                         break;
 775                 }
 776                 ep = ether_aton(str2);
 777                 if (ep == NULL) {
 778                         warnc(EINVAL, "ether_aton");
 779                         break;
 780                 }
 781                 strlcpy(ifr.ifr_name, str1, IF_NAMESIZE);
 782                 memcpy(LLADDR(dlp), ep, ETHER_ADDR_LEN);
 783                 if (ioctl(s, (*cmd == 'a') ? SIOCADDMULTI : SIOCDELMULTI,
 784                     &ifr) == -1) {
 785                         warn("ioctl SIOCADDMULTI/SIOCDELMULTI");
 786                         printf("-1\n");
 787                 } else
 788                         printf("ok\n");
 789                 break;
 790         }
 791
 792         case 'm':
 793                 fprintf(stderr,
 794                     "warning: IFF_ALLMULTI cannot be set from userland "
 795                     "in FreeBSD; command ignored.\n");
 796                 printf("-1\n");
 797                 break;
 798
 799         case 'p':
 800                 if (sscanf(line, "%s %u", ifr.ifr_name, &f) != 2) {
 801                         printf("-1\n");
 802                         break;
 803                 }
 804                 if (ioctl(s, SIOCGIFFLAGS, &ifr) == -1) {
 805                         warn("ioctl SIOCGIFFLAGS");
 806                         break;
 807                 }
 808                 flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
 809                 if (f == 0) {
 810                         flags &= ~IFF_PPROMISC;
 811                 } else {
 812                         flags |= IFF_PPROMISC;
 813                 }
 814                 ifr.ifr_flags = flags & 0xffff;
 815                 ifr.ifr_flagshigh = flags >> 16;
 816                 if (ioctl(s, SIOCSIFFLAGS, &ifr) == -1)
 817                         warn("ioctl SIOCGIFFLAGS");
 818                 else
 819                         printf( "changed to 0x%08x\n", flags );
 820                 break;
 821
 822         case '\n':
 823                 break;
 824         default:
 825                 printf("invalid command\n");
 826                 break;
 827         }
 828 }
 829
 830 static void
 831 usage(void)
 832 {
 833
 834         printf("j mcast-addr ifname [src-addr] - join IP multicast group\n");
 835         printf("l mcast-addr ifname [src-addr] - leave IP multicast group\n");
 836         printf(
 837 "i mcast-addr ifname n          - set n include mode src filter\n");
 838         printf(
 839 "e mcast-addr ifname n          - set n exclude mode src filter\n");
 840         printf("t mcast-addr ifname src-addr  - allow traffic from src\n");
 841         printf("b mcast-addr ifname src-addr  - block traffic from src\n");
 842         printf("g mcast-addr ifname n        - get and show n src filters\n");
 843         printf("a ifname mac-addr          - add link multicast filter\n");
 844         printf("d ifname mac-addr          - delete link multicast filter\n");
 845         printf("m ifname 1/0               - set/clear ether allmulti flag\n");
 846         printf("p ifname 1/0               - set/clear ether promisc flag\n");
 847         printf("f filename                 - read command(s) from file\n");
 848         printf("s seconds                  - sleep for some time\n");
 849         printf("q                          - quit\n");
 850 }
 851