usr.sbin/mtest/mtest.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause
   3  *
   4  * Copyright (c) 2007-2009 Bruce Simpson.
   5  * Copyright (c) 2000 Wilbert De Graaf.
   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  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  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 /*
  34  * Diagnostic and test utility for multicast sockets.
  35  * XXX: This file currently assumes INET support in the base system.
  36  * TODO: Support embedded KAME Scope ID in IPv6 group addresses.
  37  * TODO: Use IPv4 link-local address when source address selection
  38  * is implemented; use MCAST_JOIN_SOURCE for IPv4.
  39  */
  40
  41 #include <sys/types.h>
  42 #include <sys/param.h>
  43 #include <sys/errno.h>
  44 #include <sys/socket.h>
  45 #include <sys/time.h>
  46 #include <sys/ioctl.h>
  47
  48 #include <net/if.h>
  49 #include <net/if_dl.h>
  50 #include <net/ethernet.h>
  51 #ifdef INET
  52 #include <netinet/in.h>
  53 #include <netinet/in_systm.h>
  54 #include <netinet/ip.h>
  55 #include <netinet/ip_var.h>
  56 #endif
  57 #ifdef INET6
  58 #include <netinet/in.h>
  59 #include <netinet/ip6.h>
  60 #endif
  61
  62 #include <assert.h>
  63 #include <stdlib.h>
  64 #include <stdio.h>
  65 #include <string.h>
  66 #include <ctype.h>
  67 #include <errno.h>
  68 #include <err.h>
  69 #include <unistd.h>
  70
  71 #include <arpa/inet.h>
  72 #include <netdb.h>
  73 #include <ifaddrs.h>
  74
  75 union sockunion {
  76         struct sockaddr_storage ss;
  77         struct sockaddr         sa;
  78         struct sockaddr_dl      sdl;
  79 #ifdef INET
  80         struct sockaddr_in      sin;
  81 #endif
  82 #ifdef INET6
  83         struct sockaddr_in6     sin6;
  84 #endif
  85 };
  86 typedef union sockunion sockunion_t;
  87
  88 union mrequnion {
  89 #ifdef INET
  90         struct ip_mreq           mr;
  91         struct ip_mreq_source    mrs;
  92 #endif
  93 #ifdef INET6
  94         struct ipv6_mreq         mr6;
  95         struct group_source_req  gr;
  96 #endif
  97 };
  98 typedef union mrequnion mrequnion_t;
  99
 100 #define MAX_ADDRS       20
 101 #define STR_SIZE        20
 102 #define LINE_LENGTH     80
 103
 104 #ifdef INET
 105 static int      __ifindex_to_primary_ip(const uint32_t, struct in_addr *);
 106 #endif
 107 static uint32_t parse_cmd_args(sockunion_t *, sockunion_t *,
 108                     const char *, const char *, const char *);
 109 static void     process_file(char *, int, int);
 110 static void     process_cmd(char*, int, int, FILE *);
 111 static int      su_cmp(const void *, const void *);
 112 static void     usage(void);
 113
 114 /*
 115  * Ordering predicate for qsort().
 116  */
 117 static int
 118 su_cmp(const void *a, const void *b)
 119 {
 120         const sockunion_t       *sua = (const sockunion_t *)a;
 121         const sockunion_t       *sub = (const sockunion_t *)b;
 122
 123         assert(sua->sa.sa_family == sub->sa.sa_family);
 124
 125         switch (sua->sa.sa_family) {
 126 #ifdef INET
 127         case AF_INET:
 128                 return ((int)(sua->sin.sin_addr.s_addr -
 129                     sub->sin.sin_addr.s_addr));
 130                 break;
 131 #endif
 132 #ifdef INET6
 133         case AF_INET6:
 134                 return (memcmp(&sua->sin6.sin6_addr, &sub->sin6.sin6_addr,
 135                     sizeof(struct in6_addr)));
 136                 break;
 137 #endif
 138         default:
 139                 break;
 140         }
 141
 142         assert(sua->sa.sa_len == sub->sa.sa_len);
 143         return (memcmp(sua, sub, sua->sa.sa_len));
 144 }
 145
 146 #ifdef INET
 147 /*
 148  * Internal: Map an interface index to primary IPv4 address.
 149  * This is somewhat inefficient. This is a useful enough operation
 150  * that it probably belongs in the C library.
 151  * Return zero if found, -1 on error, 1 on not found.
 152  */
 153 static int
 154 __ifindex_to_primary_ip(const uint32_t ifindex, struct in_addr *pina)
 155 {
 156         char             ifname[IFNAMSIZ];
 157         struct ifaddrs  *ifa;
 158         struct ifaddrs  *ifaddrs;
 159         sockunion_t     *psu;
 160         int              retval;
 161
 162         assert(ifindex != 0);
 163
 164         retval = -1;
 165         if (if_indextoname(ifindex, ifname) == NULL)
 166                 return (retval);
 167         if (getifaddrs(&ifaddrs) < 0)
 168                 return (retval);
 169
 170         /*
 171          * Find the ifaddr entry corresponding to the interface name,
 172          * and return the first matching IPv4 address.
 173          */
 174         retval = 1;
 175         for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next) {
 176                 if (strcmp(ifa->ifa_name, ifname) != 0)
 177                         continue;
 178                 psu = (sockunion_t *)ifa->ifa_addr;
 179                 if (psu && psu->sa.sa_family == AF_INET) {
 180                         retval = 0;
 181                         memcpy(pina, &psu->sin.sin_addr,
 182                             sizeof(struct in_addr));
 183                         break;
 184                 }
 185         }
 186
 187         if (retval != 0)
 188                 errno = EADDRNOTAVAIL;  /* XXX */
 189
 190         freeifaddrs(ifaddrs);
 191         return (retval);
 192 }
 193 #endif /* INET */
 194
 195 int
 196 main(int argc, char **argv)
 197 {
 198         char     line[LINE_LENGTH];
 199         char    *p;
 200         int      i, s, s6;
 201
 202         s = -1;
 203         s6 = -1;
 204 #ifdef INET
 205         s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 206         if (s == -1 && errno != EAFNOSUPPORT)
 207                 err(1, "can't open IPv4 socket");
 208 #endif
 209 #ifdef INET6
 210         s6 = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP);
 211         if (s6 == -1 && errno != EAFNOSUPPORT)
 212                 err(1, "can't open IPv6 socket");
 213 #endif
 214         if (s == -1 && s6 == -1)
 215                 errc(1, EPROTONOSUPPORT, "can't open socket");
 216
 217         if (argc < 2) {
 218                 if (isatty(STDIN_FILENO)) {
 219                         printf("multicast membership test program; "
 220                             "enter ? for list of commands\n");
 221                 }
 222                 do {
 223                         if (fgets(line, sizeof(line), stdin) != NULL) {
 224                                 if (line[0] != 'f')
 225                                         process_cmd(line, s, s6, stdin);
 226                                 else {
 227                                         /* Get the filename */
 228                                         for (i = 1; isblank(line[i]); i++);
 229                                         if ((p = (char*)strchr(line, '\n'))
 230                                             != NULL)
 231                                                 *p = '\0';
 232                                         process_file(&line[i], s, s6);
 233                                 }
 234                         }
 235                 } while (!feof(stdin));
 236         } else {
 237                 for (i = 1; i < argc; i++) {
 238                         process_file(argv[i], s, s6);
 239                 }
 240         }
 241
 242         if (s != -1)
 243                 close(s);
 244         if (s6 != -1)
 245                 close(s6);
 246
 247         exit (0);
 248 }
 249
 250 static void
 251 process_file(char *fname, int s, int s6)
 252 {
 253         char line[80];
 254         FILE *fp;
 255         char *lineptr;
 256
 257         fp = fopen(fname, "r");
 258         if (fp == NULL) {
 259                 warn("fopen");
 260                 return;
 261         }
 262
 263         /* Skip comments and empty lines. */
 264         while (fgets(line, sizeof(line), fp) != NULL) {
 265                 lineptr = line;
 266                 while (isblank(*lineptr))
 267                         lineptr++;
 268                 if (*lineptr != '#' && *lineptr != '\n')
 269                         process_cmd(lineptr, s, s6, fp);
 270         }
 271
 272         fclose(fp);
 273 }
 274
 275 /*
 276  * Parse join/leave/allow/block arguments, given:
 277  *  str1: group (as AF_INET or AF_INET6 printable)
 278  *  str2: ifname
 279  *  str3: optional source address (may be NULL).
 280  *   This argument must have the same parsed address family as str1.
 281  * Return the ifindex of ifname, or 0 if any parse element failed.
 282  */
 283 static uint32_t
 284 parse_cmd_args(sockunion_t *psu, sockunion_t *psu2,
 285     const char *str1, const char *str2, const char *str3)
 286 {
 287         struct addrinfo          hints;
 288         struct addrinfo         *res;
 289         uint32_t                 ifindex;
 290         int                      af, error;
 291
 292         assert(psu != NULL);
 293         assert(str1 != NULL);
 294         assert(str2 != NULL);
 295
 296         af = AF_UNSPEC;
 297
 298         ifindex = if_nametoindex(str2);
 299         if (ifindex == 0)
 300                 return (0);
 301
 302         memset(&hints, 0, sizeof(struct addrinfo));
 303         hints.ai_flags = AI_NUMERICHOST;
 304         hints.ai_family = PF_UNSPEC;
 305         hints.ai_socktype = SOCK_DGRAM;
 306
 307         memset(psu, 0, sizeof(sockunion_t));
 308         psu->sa.sa_family = AF_UNSPEC;
 309
 310         error = getaddrinfo(str1, "0", &hints, &res);
 311         if (error) {
 312                 warnx("getaddrinfo: %s", gai_strerror(error));
 313                 return (0);
 314         }
 315         assert(res != NULL);
 316         af = res->ai_family;
 317         memcpy(psu, res->ai_addr, res->ai_addrlen);
 318         freeaddrinfo(res);
 319
 320         /* sscanf() may pass the empty string. */
 321         if (psu2 != NULL && str3 != NULL && *str3 != '\0') {
 322                 memset(psu2, 0, sizeof(sockunion_t));
 323                 psu2->sa.sa_family = AF_UNSPEC;
 324
 325                 /* look for following address family; str3 is *optional*. */
 326                 hints.ai_family = af;
 327                 error = getaddrinfo(str3, "0", &hints, &res);
 328                 if (error) {
 329                         warnx("getaddrinfo: %s", gai_strerror(error));
 330                         ifindex = 0;
 331                 } else {
 332                         if (af != res->ai_family) {
 333                                 errno = EINVAL; /* XXX */
 334                                 ifindex = 0;
 335                         }
 336                         memcpy(psu2, res->ai_addr, res->ai_addrlen);
 337                         freeaddrinfo(res);
 338                 }
 339         }
 340
 341         return (ifindex);
 342 }
 343
 344 static __inline int
 345 af2sock(const int af, int s, int s6)
 346 {
 347
 348 #ifdef INET
 349         if (af == AF_INET)
 350                 return (s);
 351 #endif
 352 #ifdef INET6
 353         if (af == AF_INET6)
 354                 return (s6);
 355 #endif
 356         return (-1);
 357 }
 358
 359 static __inline int
 360 af2socklen(const int af)
 361 {
 362
 363 #ifdef INET
 364         if (af == AF_INET)
 365                 return (sizeof(struct sockaddr_in));
 366 #endif
 367 #ifdef INET6
 368         if (af == AF_INET6)
 369                 return (sizeof(struct sockaddr_in6));
 370 #endif
 371         return (-1);
 372 }
 373
 374 static void
 375 process_cmd(char *cmd, int s, int s6, FILE *fp __unused)
 376 {
 377         char                     str1[STR_SIZE];
 378         char                     str2[STR_SIZE];
 379         char                     str3[STR_SIZE];
 380         mrequnion_t              mr;
 381         sockunion_t              su, su2;
 382         struct ifreq             ifr;
 383         char                    *line;
 384         char                    *toptname;
 385         void                    *optval;
 386         uint32_t                 fmode, ifindex;
 387         socklen_t                optlen;
 388         size_t                   j;
 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         n = 0;
 400         switch (*cmd) {
 401         case '?':
 402                 usage();
 403                 break;
 404
 405         case 'q':
 406                 close(s);
 407                 exit(0);
 408
 409         case 's':
 410                 if ((sscanf(line, "%d", &n) != 1) || (n < 1)) {
 411                         printf("-1\n");
 412                         break;
 413                 }
 414                 sleep(n);
 415                 printf("ok\n");
 416                 break;
 417
 418         case 'j':
 419         case 'l':
 420                 str3[0] = '\0';
 421                 toptname = "";
 422                 sscanf(line, "%s %s %s", str1, str2, str3);
 423                 ifindex = parse_cmd_args(&su, &su2, str1, str2, str3);
 424                 if (ifindex == 0) {
 425                         printf("-1\n");
 426                         break;
 427                 }
 428                 af = su.sa.sa_family;
 429 #ifdef INET
 430                 if (af == AF_INET) {
 431                         struct in_addr ina;
 432
 433                         error = __ifindex_to_primary_ip(ifindex, &ina);
 434                         if (error != 0) {
 435                                 warn("primary_ip_lookup %s", str2);
 436                                 printf("-1\n");
 437                                 break;
 438                         }
 439                         level = IPPROTO_IP;
 440
 441                         if (su2.sa.sa_family != AF_UNSPEC) {
 442                                 mr.mrs.imr_multiaddr = su.sin.sin_addr;
 443                                 mr.mrs.imr_sourceaddr = su2.sin.sin_addr;
 444                                 mr.mrs.imr_interface = ina;
 445                                 optname = (*cmd == 'j') ?
 446                                     IP_ADD_SOURCE_MEMBERSHIP :
 447                                     IP_DROP_SOURCE_MEMBERSHIP;
 448                                 toptname = (*cmd == 'j') ?
 449                                     "IP_ADD_SOURCE_MEMBERSHIP" :
 450                                     "IP_DROP_SOURCE_MEMBERSHIP";
 451                                 optval = (void *)&mr.mrs;
 452                                 optlen = sizeof(mr.mrs);
 453                         } else {
 454                                 mr.mr.imr_multiaddr = su.sin.sin_addr;
 455                                 mr.mr.imr_interface = ina;
 456                                 optname = (*cmd == 'j') ?
 457                                     IP_ADD_MEMBERSHIP : IP_DROP_MEMBERSHIP;
 458                                 toptname = (*cmd == 'j') ?
 459                                     "IP_ADD_MEMBERSHIP" : "IP_DROP_MEMBERSHIP";
 460                                 optval = (void *)&mr.mr;
 461                                 optlen = sizeof(mr.mr);
 462                         }
 463                         if (s < 0) {
 464                                 warnc(EPROTONOSUPPORT, "setsockopt %s",
 465                                     toptname);
 466                         } else if (setsockopt(s, level, optname, optval,
 467                             optlen) == 0) {
 468                                 printf("ok\n");
 469                                 break;
 470                         } else {
 471                                 warn("setsockopt %s", toptname);
 472                         }
 473                 }
 474 #ifdef INET6
 475                 else
 476 #endif /* INET with INET6 */
 477 #endif /* INET */
 478 #ifdef INET6
 479                 if (af == AF_INET6) {
 480                         level = IPPROTO_IPV6;
 481                         if (su2.sa.sa_family != AF_UNSPEC) {
 482                                 mr.gr.gsr_interface = ifindex;
 483                                 mr.gr.gsr_group = su.ss;
 484                                 mr.gr.gsr_source = su2.ss;
 485                                 optname = (*cmd == 'j') ?
 486                                     MCAST_JOIN_SOURCE_GROUP:
 487                                     MCAST_LEAVE_SOURCE_GROUP;
 488                                 toptname = (*cmd == 'j') ?
 489                                     "MCAST_JOIN_SOURCE_GROUP":
 490                                     "MCAST_LEAVE_SOURCE_GROUP";
 491                                 optval = (void *)&mr.gr;
 492                                 optlen = sizeof(mr.gr);
 493                         } else {
 494                                 mr.mr6.ipv6mr_multiaddr = su.sin6.sin6_addr;
 495                                 mr.mr6.ipv6mr_interface = ifindex;
 496                                 optname = (*cmd == 'j') ?
 497                                     IPV6_JOIN_GROUP :
 498                                     IPV6_LEAVE_GROUP;
 499                                 toptname = (*cmd == 'j') ?
 500                                     "IPV6_JOIN_GROUP" :
 501                                     "IPV6_LEAVE_GROUP";
 502                                 optval = (void *)&mr.mr6;
 503                                 optlen = sizeof(mr.mr6);
 504                         }
 505                         if (s6 < 0) {
 506                                 warnc(EPROTONOSUPPORT, "setsockopt %s",
 507                                     toptname);
 508                         } else if (setsockopt(s6, level, optname, optval,
 509                             optlen) == 0) {
 510                                 printf("ok\n");
 511                                 break;
 512                         } else {
 513                                 warn("setsockopt %s", toptname);
 514                         }
 515                 }
 516 #endif /* INET6 */
 517                 /* FALLTHROUGH */
 518                 printf("-1\n");
 519                 break;
 520
 521         /*
 522          * Set the socket to include or exclude filter mode, and
 523          * add some sources to the filterlist, using the full-state API.
 524          */
 525         case 'i':
 526         case 'e': {
 527                 sockunion_t      sources[MAX_ADDRS];
 528                 struct addrinfo  hints;
 529                 struct addrinfo *res;
 530                 char            *cp;
 531                 int              af1;
 532
 533                 n = 0;
 534                 fmode = (*cmd == 'i') ? MCAST_INCLUDE : MCAST_EXCLUDE;
 535                 if ((sscanf(line, "%s %s %d", str1, str2, &n)) != 3) {
 536                         printf("-1\n");
 537                         break;
 538                 }
 539
 540                 ifindex = parse_cmd_args(&su, NULL, str1, str2, NULL);
 541                 if (ifindex == 0 || n < 0 || n > MAX_ADDRS) {
 542                         printf("-1\n");
 543                         break;
 544                 }
 545                 af = su.sa.sa_family;
 546                 if (af2sock(af, s, s6) == -1) {
 547                         warnc(EPROTONOSUPPORT, "setsourcefilter");
 548                         break;
 549                 }
 550
 551                 memset(&hints, 0, sizeof(struct addrinfo));
 552                 hints.ai_flags = AI_NUMERICHOST;
 553                 hints.ai_family = af;
 554                 hints.ai_socktype = SOCK_DGRAM;
 555
 556                 for (i = 0; i < n; i++) {
 557                         sockunion_t *psu = (sockunion_t *)&sources[i];
 558                         /*
 559                          * Trim trailing whitespace, as getaddrinfo()
 560                          * can't cope with it.
 561                          */
 562                         fgets(str1, sizeof(str1), fp);
 563                         cp = strchr(str1, '\n');
 564                         if (cp != NULL)
 565                                 *cp = '\0';
 566
 567                         res = NULL;
 568                         error = getaddrinfo(str1, "0", &hints, &res);
 569                         if (error)
 570                                 break;
 571                         assert(res != NULL);
 572
 573                         memset(psu, 0, sizeof(sockunion_t));
 574                         af1 = res->ai_family;
 575                         if (af1 == af)
 576                                 memcpy(psu, res->ai_addr, res->ai_addrlen);
 577                         freeaddrinfo(res);
 578                         if (af1 != af)
 579                                 break;
 580                 }
 581                 if (i < n) {
 582                         if (error)
 583                                 warnx("getaddrinfo: %s", gai_strerror(error));
 584                         printf("-1\n");
 585                         break;
 586                 }
 587                 if (setsourcefilter(af2sock(af, s, s6), ifindex,
 588                     &su.sa, su.sa.sa_len, fmode, n, &sources[0].ss) != 0)
 589                         warn("setsourcefilter");
 590                 else
 591                         printf("ok\n");
 592         } break;
 593
 594         /*
 595          * Allow or block traffic from a source, using the
 596          * delta based api.
 597          */
 598         case 't':
 599         case 'b': {
 600                 str3[0] = '\0';
 601                 toptname = "";
 602                 sscanf(line, "%s %s %s", str1, str2, str3);
 603                 ifindex = parse_cmd_args(&su, &su2, str1, str2, str3);
 604                 if (ifindex == 0 || su2.sa.sa_family == AF_UNSPEC) {
 605                         printf("-1\n");
 606                         break;
 607                 }
 608                 af = su.sa.sa_family;
 609                 if (af2sock(af, s, s6) == -1) {
 610                         warnc(EPROTONOSUPPORT, "getsourcefilter");
 611                         break;
 612                 }
 613
 614                 /* First determine our current filter mode. */
 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 (j = 0; j < (nsrc * sizeof(sources[0])); j++) {
 738                         fprintf(stderr, "%02x", bp[j]);
 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