1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1983, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #if 0 37 static char sccsid[] = "@(#)ifconfig.c 8.2 (Berkeley) 2/16/94"; 38 #endif 39 static const char rcsid[] = 40 "$FreeBSD$"; 41 #endif /* not lint */ 42 43 #include <sys/param.h> 44 #include <sys/ioctl.h> 45 #include <sys/module.h> 46 #include <sys/linker.h> 47 #include <sys/nv.h> 48 #include <sys/queue.h> 49 #include <sys/socket.h> 50 #include <sys/time.h> 51 52 #include <net/ethernet.h> 53 #include <net/if.h> 54 #include <net/if_dl.h> 55 #include <net/if_types.h> 56 #include <net/route.h> 57 58 /* IP */ 59 #include <netinet/in.h> 60 #include <netinet/in_var.h> 61 #include <arpa/inet.h> 62 #include <netdb.h> 63 64 #include <fnmatch.h> 65 #include <ifaddrs.h> 66 #include <ctype.h> 67 #include <err.h> 68 #include <errno.h> 69 #include <fcntl.h> 70 #ifdef JAIL 71 #include <jail.h> 72 #endif 73 #include <stdbool.h> 74 #include <stdio.h> 75 #include <stdlib.h> 76 #include <string.h> 77 #include <unistd.h> 78 79 #include <libifconfig.h> 80 81 #include "ifconfig.h" 82 83 ifconfig_handle_t *lifh; 84 85 /* 86 * Since "struct ifreq" is composed of various union members, callers 87 * should pay special attention to interpret the value. 88 * (.e.g. little/big endian difference in the structure.) 89 */ 90 struct ifreq ifr; 91 92 char name[IFNAMSIZ]; 93 char *descr = NULL; 94 size_t descrlen = 64; 95 int setaddr; 96 int setmask; 97 int doalias; 98 int clearaddr; 99 int newaddr = 1; 100 int verbose; 101 int printifname = 0; 102 103 struct ifconfig_args args; 104 105 int printkeys = 0; /* Print keying material for interfaces. */ 106 int exit_code = 0; 107 108 /* Formatter Strings */ 109 char *f_inet, *f_inet6, *f_ether, *f_addr; 110 111 static void list_interfaces_ioctl(struct ifconfig_args *args); 112 static void status(struct ifconfig_args *args, const struct sockaddr_dl *sdl, 113 struct ifaddrs *ifa); 114 static _Noreturn void usage(void); 115 116 static int getifflags(const char *ifname, int us, bool err_ok); 117 118 static struct afswtch *af_getbyname(const char *name); 119 120 void printifnamemaybe(void); 121 122 static struct option *opts = NULL; 123 124 struct ifa_order_elt { 125 int if_order; 126 int af_orders[255]; 127 struct ifaddrs *ifa; 128 TAILQ_ENTRY(ifa_order_elt) link; 129 }; 130 131 TAILQ_HEAD(ifa_queue, ifa_order_elt); 132 133 static struct module_map_entry { 134 const char *ifname; 135 const char *kldname; 136 } module_map[] = { 137 { 138 .ifname = "tun", 139 .kldname = "if_tuntap", 140 }, 141 { 142 .ifname = "tap", 143 .kldname = "if_tuntap", 144 }, 145 { 146 .ifname = "vmnet", 147 .kldname = "if_tuntap", 148 }, 149 { 150 .ifname = "ipsec", 151 .kldname = "ipsec", 152 }, 153 { 154 /* 155 * This mapping exists because there is a conflicting enc module 156 * in CAM. ifconfig's guessing behavior will attempt to match 157 * the ifname to a module as well as if_${ifname} and clash with 158 * CAM enc. This is an assertion of the correct module to load. 159 */ 160 .ifname = "enc", 161 .kldname = "if_enc", 162 }, 163 }; 164 165 166 void 167 opt_register(struct option *p) 168 { 169 p->next = opts; 170 opts = p; 171 } 172 173 static void 174 usage(void) 175 { 176 char options[1024]; 177 struct option *p; 178 179 /* XXX not right but close enough for now */ 180 options[0] = '\0'; 181 for (p = opts; p != NULL; p = p->next) { 182 strlcat(options, p->opt_usage, sizeof(options)); 183 strlcat(options, " ", sizeof(options)); 184 } 185 186 fprintf(stderr, 187 "usage: ifconfig [-f type:format] %sinterface address_family\n" 188 " [address [dest_address]] [parameters]\n" 189 " ifconfig interface create\n" 190 " ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n" 191 " ifconfig -l [-d] [-u] [address_family]\n" 192 " ifconfig %s[-d] [-m] [-u] [-v]\n", 193 options, options, options); 194 exit(1); 195 } 196 197 void 198 ioctl_ifcreate(int s, struct ifreq *ifr) 199 { 200 if (ioctl(s, SIOCIFCREATE2, ifr) < 0) { 201 switch (errno) { 202 case EEXIST: 203 errx(1, "interface %s already exists", ifr->ifr_name); 204 default: 205 err(1, "SIOCIFCREATE2 (%s)", ifr->ifr_name); 206 } 207 } 208 } 209 210 static int 211 calcorders(struct ifaddrs *ifa, struct ifa_queue *q) 212 { 213 struct ifaddrs *prev; 214 struct ifa_order_elt *cur; 215 unsigned int ord, af, ifa_ord; 216 217 prev = NULL; 218 cur = NULL; 219 ord = 0; 220 ifa_ord = 0; 221 222 while (ifa != NULL) { 223 if (prev == NULL || 224 strcmp(ifa->ifa_name, prev->ifa_name) != 0) { 225 cur = calloc(1, sizeof(*cur)); 226 227 if (cur == NULL) 228 return (-1); 229 230 TAILQ_INSERT_TAIL(q, cur, link); 231 cur->if_order = ifa_ord ++; 232 cur->ifa = ifa; 233 ord = 0; 234 } 235 236 if (ifa->ifa_addr) { 237 af = ifa->ifa_addr->sa_family; 238 239 if (af < nitems(cur->af_orders) && 240 cur->af_orders[af] == 0) 241 cur->af_orders[af] = ++ord; 242 } 243 prev = ifa; 244 ifa = ifa->ifa_next; 245 } 246 247 return (0); 248 } 249 250 static int 251 cmpifaddrs(struct ifaddrs *a, struct ifaddrs *b, struct ifa_queue *q) 252 { 253 struct ifa_order_elt *cur, *e1, *e2; 254 unsigned int af1, af2; 255 int ret; 256 257 e1 = e2 = NULL; 258 259 ret = strcmp(a->ifa_name, b->ifa_name); 260 if (ret != 0) { 261 TAILQ_FOREACH(cur, q, link) { 262 if (e1 && e2) 263 break; 264 265 if (strcmp(cur->ifa->ifa_name, a->ifa_name) == 0) 266 e1 = cur; 267 else if (strcmp(cur->ifa->ifa_name, b->ifa_name) == 0) 268 e2 = cur; 269 } 270 271 if (!e1 || !e2) 272 return (0); 273 else 274 return (e1->if_order - e2->if_order); 275 276 } else if (a->ifa_addr != NULL && b->ifa_addr != NULL) { 277 TAILQ_FOREACH(cur, q, link) { 278 if (strcmp(cur->ifa->ifa_name, a->ifa_name) == 0) { 279 e1 = cur; 280 break; 281 } 282 } 283 284 if (!e1) 285 return (0); 286 287 af1 = a->ifa_addr->sa_family; 288 af2 = b->ifa_addr->sa_family; 289 290 if (af1 < nitems(e1->af_orders) && af2 < nitems(e1->af_orders)) 291 return (e1->af_orders[af1] - e1->af_orders[af2]); 292 } 293 294 return (0); 295 } 296 297 static void freeformat(void) 298 { 299 300 if (f_inet != NULL) 301 free(f_inet); 302 if (f_inet6 != NULL) 303 free(f_inet6); 304 if (f_ether != NULL) 305 free(f_ether); 306 if (f_addr != NULL) 307 free(f_addr); 308 } 309 310 static void setformat(char *input) 311 { 312 char *formatstr, *category, *modifier; 313 314 formatstr = strdup(input); 315 while ((category = strsep(&formatstr, ",")) != NULL) { 316 modifier = strchr(category, ':'); 317 if (modifier == NULL || modifier[1] == '\0') { 318 warnx("Skipping invalid format specification: %s\n", 319 category); 320 continue; 321 } 322 323 /* Split the string on the separator, then seek past it */ 324 modifier[0] = '\0'; 325 modifier++; 326 327 if (strcmp(category, "addr") == 0) 328 f_addr = strdup(modifier); 329 else if (strcmp(category, "ether") == 0) 330 f_ether = strdup(modifier); 331 else if (strcmp(category, "inet") == 0) 332 f_inet = strdup(modifier); 333 else if (strcmp(category, "inet6") == 0) 334 f_inet6 = strdup(modifier); 335 } 336 free(formatstr); 337 } 338 339 static struct ifaddrs * 340 sortifaddrs(struct ifaddrs *list, 341 int (*compare)(struct ifaddrs *, struct ifaddrs *, struct ifa_queue *), 342 struct ifa_queue *q) 343 { 344 struct ifaddrs *right, *temp, *last, *result, *next, *tail; 345 346 right = list; 347 temp = list; 348 last = list; 349 result = NULL; 350 next = NULL; 351 tail = NULL; 352 353 if (!list || !list->ifa_next) 354 return (list); 355 356 while (temp && temp->ifa_next) { 357 last = right; 358 right = right->ifa_next; 359 temp = temp->ifa_next->ifa_next; 360 } 361 362 last->ifa_next = NULL; 363 364 list = sortifaddrs(list, compare, q); 365 right = sortifaddrs(right, compare, q); 366 367 while (list || right) { 368 369 if (!right) { 370 next = list; 371 list = list->ifa_next; 372 } else if (!list) { 373 next = right; 374 right = right->ifa_next; 375 } else if (compare(list, right, q) <= 0) { 376 next = list; 377 list = list->ifa_next; 378 } else { 379 next = right; 380 right = right->ifa_next; 381 } 382 383 if (!result) 384 result = next; 385 else 386 tail->ifa_next = next; 387 388 tail = next; 389 } 390 391 return (result); 392 } 393 394 void printifnamemaybe() 395 { 396 if (printifname) 397 printf("%s\n", name); 398 } 399 400 static void 401 list_interfaces(struct ifconfig_args *args) 402 { 403 #ifdef WITHOUT_NETLINK 404 list_interfaces_ioctl(args); 405 #else 406 list_interfaces_nl(args); 407 #endif 408 } 409 410 int 411 main(int argc, char *argv[]) 412 { 413 int c; 414 const struct afswtch *afp = NULL; 415 int ifindex; 416 char options[1024], *envformat; 417 struct option *p; 418 size_t iflen; 419 int flags; 420 421 f_inet = f_inet6 = f_ether = f_addr = NULL; 422 423 lifh = ifconfig_open(); 424 if (lifh == NULL) 425 err(EXIT_FAILURE, "ifconfig_open"); 426 427 envformat = getenv("IFCONFIG_FORMAT"); 428 if (envformat != NULL) 429 setformat(envformat); 430 431 /* 432 * Ensure we print interface name when expected to, 433 * even if we terminate early due to error. 434 */ 435 atexit(printifnamemaybe); 436 437 /* Parse leading line options */ 438 strlcpy(options, "G:adf:klmnuv", sizeof(options)); 439 for (p = opts; p != NULL; p = p->next) 440 strlcat(options, p->opt, sizeof(options)); 441 while ((c = getopt(argc, argv, options)) != -1) { 442 switch (c) { 443 case 'a': /* scan all interfaces */ 444 args.all = true; 445 break; 446 case 'd': /* restrict scan to "down" interfaces */ 447 args.downonly = true; 448 break; 449 case 'f': 450 if (optarg == NULL) 451 usage(); 452 setformat(optarg); 453 break; 454 case 'G': 455 if (optarg == NULL || args.all == 0) 456 usage(); 457 args.nogroup = optarg; 458 break; 459 case 'k': 460 args.printkeys = true; 461 break; 462 case 'l': /* scan interface names only */ 463 args.namesonly++; 464 break; 465 case 'm': /* show media choices in status */ 466 args.supmedia = true; 467 break; 468 case 'n': /* suppress module loading */ 469 args.noload = true; 470 break; 471 case 'u': /* restrict scan to "up" interfaces */ 472 args.uponly = true; 473 break; 474 case 'v': 475 args.verbose++; 476 break; 477 case 'g': 478 if (args.all) { 479 if (optarg == NULL) 480 usage(); 481 args.matchgroup = optarg; 482 break; 483 } 484 /* FALLTHROUGH */ 485 default: 486 for (p = opts; p != NULL; p = p->next) 487 if (p->opt[0] == c) { 488 p->cb(optarg); 489 break; 490 } 491 if (p == NULL) 492 usage(); 493 break; 494 } 495 } 496 argc -= optind; 497 argv += optind; 498 499 /* Sync global variables */ 500 printkeys = args.printkeys; 501 verbose = args.verbose; 502 503 /* -l cannot be used with -a or -m */ 504 if (args.namesonly && (args.all || args.supmedia)) 505 usage(); 506 507 /* nonsense.. */ 508 if (args.uponly && args.downonly) 509 usage(); 510 511 /* no arguments is equivalent to '-a' */ 512 if (!args.namesonly && argc < 1) 513 args.all = 1; 514 515 /* -a and -l allow an address family arg to limit the output */ 516 if (args.all || args.namesonly) { 517 if (argc > 1) 518 usage(); 519 520 ifindex = 0; 521 if (argc == 1) { 522 afp = af_getbyname(*argv); 523 if (afp == NULL) { 524 warnx("Address family '%s' unknown.", *argv); 525 usage(); 526 } 527 if (afp->af_name != NULL) 528 argc--, argv++; 529 /* leave with afp non-zero */ 530 } 531 } else { 532 /* not listing, need an argument */ 533 if (argc < 1) 534 usage(); 535 536 args.ifname = *argv; 537 argc--, argv++; 538 539 /* check and maybe load support for this interface */ 540 ifmaybeload(&args, args.ifname); 541 542 ifindex = if_nametoindex(args.ifname); 543 if (ifindex == 0) { 544 /* 545 * NOTE: We must special-case the `create' command 546 * right here as we would otherwise fail when trying 547 * to find the interface. 548 */ 549 if (argc > 0 && (strcmp(argv[0], "create") == 0 || 550 strcmp(argv[0], "plumb") == 0)) { 551 iflen = strlcpy(name, args.ifname, sizeof(name)); 552 if (iflen >= sizeof(name)) 553 errx(1, "%s: cloning name too long", 554 args.ifname); 555 ifconfig(argc, argv, 1, NULL); 556 exit(exit_code); 557 } 558 #ifdef JAIL 559 /* 560 * NOTE: We have to special-case the `-vnet' command 561 * right here as we would otherwise fail when trying 562 * to find the interface as it lives in another vnet. 563 */ 564 if (argc > 0 && (strcmp(argv[0], "-vnet") == 0)) { 565 iflen = strlcpy(name, args.ifname, sizeof(name)); 566 if (iflen >= sizeof(name)) 567 errx(1, "%s: interface name too long", 568 args.ifname); 569 ifconfig(argc, argv, 0, NULL); 570 exit(exit_code); 571 } 572 #endif 573 errx(1, "interface %s does not exist", args.ifname); 574 } else { 575 /* 576 * Do not allow use `create` command as hostname if 577 * address family is not specified. 578 */ 579 if (argc > 0 && (strcmp(argv[0], "create") == 0 || 580 strcmp(argv[0], "plumb") == 0)) { 581 if (argc == 1) 582 errx(1, "interface %s already exists", 583 args.ifname); 584 argc--, argv++; 585 } 586 } 587 } 588 589 /* Check for address family */ 590 if (argc > 0) { 591 afp = af_getbyname(*argv); 592 if (afp != NULL) 593 argc--, argv++; 594 } 595 596 /* 597 * Check for a requested configuration action on a single interface, 598 * which doesn't require building, sorting, and searching the entire 599 * system address list 600 */ 601 if ((argc > 0) && (args.ifname != NULL)) { 602 iflen = strlcpy(name, args.ifname, sizeof(name)); 603 if (iflen >= sizeof(name)) { 604 warnx("%s: interface name too long, skipping", args.ifname); 605 } else { 606 flags = getifflags(name, -1, false); 607 if (!(((flags & IFF_CANTCONFIG) != 0) || 608 (args.downonly && (flags & IFF_UP) != 0) || 609 (args.uponly && (flags & IFF_UP) == 0))) 610 ifconfig(argc, argv, 0, afp); 611 } 612 goto done; 613 } 614 615 args.afp = afp; 616 args.allfamilies = afp == NULL; 617 args.argc = argc; 618 args.argv = argv; 619 620 list_interfaces(&args); 621 622 done: 623 freeformat(); 624 ifconfig_close(lifh); 625 exit(exit_code); 626 } 627 628 bool 629 match_ether(const struct sockaddr_dl *sdl) 630 { 631 switch (sdl->sdl_type) { 632 case IFT_ETHER: 633 case IFT_L2VLAN: 634 case IFT_BRIDGE: 635 if (sdl->sdl_alen == ETHER_ADDR_LEN) 636 return (true); 637 default: 638 return (false); 639 } 640 } 641 642 static bool 643 match_afp(const struct afswtch *afp, int sa_family, const struct sockaddr_dl *sdl) 644 { 645 if (afp == NULL) 646 return (true); 647 /* special case for "ether" address family */ 648 if (!strcmp(afp->af_name, "ether")) { 649 if (sdl == NULL && !match_ether(sdl)) 650 return (false); 651 return (true); 652 } 653 return (afp->af_af == sa_family); 654 } 655 656 bool 657 match_if_flags(struct ifconfig_args *args, int if_flags) 658 { 659 if ((if_flags & IFF_CANTCONFIG) != 0) 660 return (false); 661 if (args->downonly && (if_flags & IFF_UP) != 0) 662 return (false); 663 if (args->uponly && (if_flags & IFF_UP) == 0) 664 return (false); 665 return (true); 666 } 667 668 #ifdef WITHOUT_NETLINK 669 static void 670 list_interfaces_ioctl(struct ifconfig_args *args) 671 { 672 struct ifa_queue q = TAILQ_HEAD_INITIALIZER(q); 673 struct ifaddrs *ifap, *sifap, *ifa; 674 struct ifa_order_elt *cur, *tmp; 675 char *namecp = NULL; 676 int ifindex; 677 size_t iflen; 678 679 if (getifaddrs(&ifap) != 0) 680 err(EXIT_FAILURE, "getifaddrs"); 681 682 char *cp = NULL; 683 684 if (calcorders(ifap, &q) != 0) 685 err(EXIT_FAILURE, "calcorders"); 686 687 sifap = sortifaddrs(ifap, cmpifaddrs, &q); 688 689 TAILQ_FOREACH_SAFE(cur, &q, link, tmp) 690 free(cur); 691 692 ifindex = 0; 693 for (ifa = sifap; ifa; ifa = ifa->ifa_next) { 694 struct ifreq paifr = {}; 695 const struct sockaddr_dl *sdl; 696 697 strlcpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name)); 698 if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) { 699 memcpy(&paifr.ifr_addr, ifa->ifa_addr, 700 ifa->ifa_addr->sa_len); 701 } 702 703 if (args->ifname != NULL && strcmp(args->ifname, ifa->ifa_name) != 0) 704 continue; 705 if (ifa->ifa_addr->sa_family == AF_LINK) 706 sdl = (const struct sockaddr_dl *) ifa->ifa_addr; 707 else 708 sdl = NULL; 709 if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0 && !args->namesonly) 710 continue; 711 iflen = strlcpy(name, ifa->ifa_name, sizeof(name)); 712 if (iflen >= sizeof(name)) { 713 warnx("%s: interface name too long, skipping", 714 ifa->ifa_name); 715 continue; 716 } 717 cp = ifa->ifa_name; 718 719 if (!match_if_flags(args, ifa->ifa_flags)) 720 continue; 721 if (!group_member(ifa->ifa_name, args->matchgroup, args->nogroup)) 722 continue; 723 /* 724 * Are we just listing the interfaces? 725 */ 726 if (args->namesonly) { 727 if (namecp == cp) 728 continue; 729 if (!match_afp(args->afp, ifa->ifa_addr->sa_family, sdl)) 730 continue; 731 namecp = cp; 732 ifindex++; 733 if (ifindex > 1) 734 printf(" "); 735 fputs(name, stdout); 736 continue; 737 } 738 ifindex++; 739 740 if (args->argc > 0) 741 ifconfig(args->argc, args->argv, 0, args->afp); 742 else 743 status(args, sdl, ifa); 744 } 745 if (args->namesonly) 746 printf("\n"); 747 freeifaddrs(ifap); 748 } 749 #endif 750 751 /* 752 * Returns true if an interface should be listed because any its groups 753 * matches shell pattern "match" and none of groups matches pattern "nomatch". 754 * If any pattern is NULL, corresponding condition is skipped. 755 */ 756 bool 757 group_member(const char *ifname, const char *match, const char *nomatch) 758 { 759 static int sock = -1; 760 761 struct ifgroupreq ifgr; 762 struct ifg_req *ifg; 763 int len; 764 bool matched, nomatched; 765 766 /* Sanity checks. */ 767 if (match == NULL && nomatch == NULL) 768 return (true); 769 if (ifname == NULL) 770 return (false); 771 772 memset(&ifgr, 0, sizeof(ifgr)); 773 strlcpy(ifgr.ifgr_name, ifname, IFNAMSIZ); 774 775 /* The socket is opened once. Let _exit() close it. */ 776 if (sock == -1) { 777 sock = socket(AF_LOCAL, SOCK_DGRAM, 0); 778 if (sock == -1) 779 errx(1, "%s: socket(AF_LOCAL,SOCK_DGRAM)", __func__); 780 } 781 782 /* Determine amount of memory for the list of groups. */ 783 if (ioctl(sock, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) { 784 if (errno == EINVAL || errno == ENOTTY) 785 return (false); 786 else 787 errx(1, "%s: SIOCGIFGROUP", __func__); 788 } 789 790 /* Obtain the list of groups. */ 791 len = ifgr.ifgr_len; 792 ifgr.ifgr_groups = 793 (struct ifg_req *)calloc(len / sizeof(*ifg), sizeof(*ifg)); 794 795 if (ifgr.ifgr_groups == NULL) 796 errx(1, "%s: no memory", __func__); 797 if (ioctl(sock, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) 798 errx(1, "%s: SIOCGIFGROUP", __func__); 799 800 /* Perform matching. */ 801 matched = false; 802 nomatched = true; 803 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(*ifg); ifg++) { 804 len -= sizeof(struct ifg_req); 805 if (match) 806 matched |= !fnmatch(match, ifg->ifgrq_group, 0); 807 if (nomatch) 808 nomatched &= fnmatch(nomatch, ifg->ifgrq_group, 0); 809 } 810 free(ifgr.ifgr_groups); 811 812 if (match && !nomatch) 813 return (matched); 814 if (!match && nomatch) 815 return (nomatched); 816 return (matched && nomatched); 817 } 818 819 static struct afswtch *afs = NULL; 820 821 void 822 af_register(struct afswtch *p) 823 { 824 p->af_next = afs; 825 afs = p; 826 } 827 828 static struct afswtch * 829 af_getbyname(const char *name) 830 { 831 struct afswtch *afp; 832 833 for (afp = afs; afp != NULL; afp = afp->af_next) 834 if (strcmp(afp->af_name, name) == 0) 835 return afp; 836 return NULL; 837 } 838 839 struct afswtch * 840 af_getbyfamily(int af) 841 { 842 struct afswtch *afp; 843 844 for (afp = afs; afp != NULL; afp = afp->af_next) 845 if (afp->af_af == af) 846 return afp; 847 return NULL; 848 } 849 850 void 851 af_other_status(int s) 852 { 853 struct afswtch *afp; 854 uint8_t afmask[howmany(AF_MAX, NBBY)]; 855 856 memset(afmask, 0, sizeof(afmask)); 857 for (afp = afs; afp != NULL; afp = afp->af_next) { 858 if (afp->af_other_status == NULL) 859 continue; 860 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 861 continue; 862 afp->af_other_status(s); 863 setbit(afmask, afp->af_af); 864 } 865 } 866 867 static void 868 af_all_tunnel_status(int s) 869 { 870 struct afswtch *afp; 871 uint8_t afmask[howmany(AF_MAX, NBBY)]; 872 873 memset(afmask, 0, sizeof(afmask)); 874 for (afp = afs; afp != NULL; afp = afp->af_next) { 875 if (afp->af_status_tunnel == NULL) 876 continue; 877 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 878 continue; 879 afp->af_status_tunnel(s); 880 setbit(afmask, afp->af_af); 881 } 882 } 883 884 static struct cmd *cmds = NULL; 885 886 void 887 cmd_register(struct cmd *p) 888 { 889 p->c_next = cmds; 890 cmds = p; 891 } 892 893 static const struct cmd * 894 cmd_lookup(const char *name, int iscreate) 895 { 896 const struct cmd *p; 897 898 for (p = cmds; p != NULL; p = p->c_next) 899 if (strcmp(name, p->c_name) == 0) { 900 if (iscreate) { 901 if (p->c_iscloneop) 902 return p; 903 } else { 904 if (!p->c_iscloneop) 905 return p; 906 } 907 } 908 return NULL; 909 } 910 911 struct callback { 912 callback_func *cb_func; 913 void *cb_arg; 914 struct callback *cb_next; 915 }; 916 static struct callback *callbacks = NULL; 917 918 void 919 callback_register(callback_func *func, void *arg) 920 { 921 struct callback *cb; 922 923 cb = malloc(sizeof(struct callback)); 924 if (cb == NULL) 925 errx(1, "unable to allocate memory for callback"); 926 cb->cb_func = func; 927 cb->cb_arg = arg; 928 cb->cb_next = callbacks; 929 callbacks = cb; 930 } 931 932 /* specially-handled commands */ 933 static void setifaddr(const char *, int, int, const struct afswtch *); 934 static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr); 935 936 static void setifdstaddr(const char *, int, int, const struct afswtch *); 937 static const struct cmd setifdstaddr_cmd = 938 DEF_CMD("ifdstaddr", 0, setifdstaddr); 939 940 int 941 ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *uafp) 942 { 943 const struct afswtch *afp, *nafp; 944 const struct cmd *p; 945 struct callback *cb; 946 int s; 947 948 strlcpy(ifr.ifr_name, name, sizeof ifr.ifr_name); 949 afp = NULL; 950 if (uafp != NULL) 951 afp = uafp; 952 /* 953 * This is the historical "accident" allowing users to configure IPv4 954 * addresses without the "inet" keyword which while a nice feature has 955 * proven to complicate other things. We cannot remove this but only 956 * make sure we will never have a similar implicit default for IPv6 or 957 * any other address familiy. We need a fallback though for 958 * ifconfig IF up/down etc. to work without INET support as people 959 * never used ifconfig IF link up/down, etc. either. 960 */ 961 #ifndef RESCUE 962 #ifdef INET 963 if (afp == NULL && feature_present("inet")) 964 afp = af_getbyname("inet"); 965 #endif 966 #endif 967 if (afp == NULL) 968 afp = af_getbyname("link"); 969 if (afp == NULL) { 970 warnx("Please specify an address_family."); 971 usage(); 972 } 973 top: 974 ifr.ifr_addr.sa_family = 975 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ? 976 AF_LOCAL : afp->af_af; 977 978 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 && 979 (uafp != NULL || errno != EAFNOSUPPORT || 980 (s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0)) 981 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 982 983 while (argc > 0) { 984 p = cmd_lookup(*argv, iscreate); 985 if (iscreate && p == NULL) { 986 /* 987 * Push the clone create callback so the new 988 * device is created and can be used for any 989 * remaining arguments. 990 */ 991 cb = callbacks; 992 if (cb == NULL) 993 errx(1, "internal error, no callback"); 994 callbacks = cb->cb_next; 995 cb->cb_func(s, cb->cb_arg); 996 iscreate = 0; 997 /* 998 * Handle any address family spec that 999 * immediately follows and potentially 1000 * recreate the socket. 1001 */ 1002 nafp = af_getbyname(*argv); 1003 if (nafp != NULL) { 1004 argc--, argv++; 1005 if (nafp != afp) { 1006 close(s); 1007 afp = nafp; 1008 goto top; 1009 } 1010 } 1011 /* 1012 * Look for a normal parameter. 1013 */ 1014 continue; 1015 } 1016 if (p == NULL) { 1017 /* 1018 * Not a recognized command, choose between setting 1019 * the interface address and the dst address. 1020 */ 1021 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd); 1022 } 1023 if (p->c_parameter == NEXTARG && p->c_u.c_func) { 1024 if (argv[1] == NULL) 1025 errx(1, "'%s' requires argument", 1026 p->c_name); 1027 p->c_u.c_func(argv[1], 0, s, afp); 1028 argc--, argv++; 1029 } else if (p->c_parameter == OPTARG && p->c_u.c_func) { 1030 p->c_u.c_func(argv[1], 0, s, afp); 1031 if (argv[1] != NULL) 1032 argc--, argv++; 1033 } else if (p->c_parameter == NEXTARG2 && p->c_u.c_func2) { 1034 if (argc < 3) 1035 errx(1, "'%s' requires 2 arguments", 1036 p->c_name); 1037 p->c_u.c_func2(argv[1], argv[2], s, afp); 1038 argc -= 2, argv += 2; 1039 } else if (p->c_parameter == SPARAM && p->c_u.c_func3) { 1040 p->c_u.c_func3(*argv, p->c_sparameter, s, afp); 1041 } else if (p->c_u.c_func) 1042 p->c_u.c_func(*argv, p->c_parameter, s, afp); 1043 argc--, argv++; 1044 } 1045 1046 /* 1047 * Do any post argument processing required by the address family. 1048 */ 1049 if (afp->af_postproc != NULL) 1050 afp->af_postproc(s, afp, newaddr, getifflags(name, s, true)); 1051 /* 1052 * Do deferred callbacks registered while processing 1053 * command-line arguments. 1054 */ 1055 for (cb = callbacks; cb != NULL; cb = cb->cb_next) 1056 cb->cb_func(s, cb->cb_arg); 1057 /* 1058 * Do deferred operations. 1059 */ 1060 if (clearaddr) { 1061 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) { 1062 warnx("interface %s cannot change %s addresses!", 1063 name, afp->af_name); 1064 clearaddr = 0; 1065 } 1066 } 1067 if (clearaddr) { 1068 int ret; 1069 strlcpy(((struct ifreq *)afp->af_ridreq)->ifr_name, name, 1070 sizeof ifr.ifr_name); 1071 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq); 1072 if (ret < 0) { 1073 if (errno == EADDRNOTAVAIL && (doalias >= 0)) { 1074 /* means no previous address for interface */ 1075 } else 1076 Perror("ioctl (SIOCDIFADDR)"); 1077 } 1078 } 1079 if (newaddr) { 1080 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) { 1081 warnx("interface %s cannot change %s addresses!", 1082 name, afp->af_name); 1083 newaddr = 0; 1084 } 1085 } 1086 if (newaddr && (setaddr || setmask)) { 1087 strlcpy(((struct ifreq *)afp->af_addreq)->ifr_name, name, 1088 sizeof ifr.ifr_name); 1089 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0) 1090 Perror("ioctl (SIOCAIFADDR)"); 1091 } 1092 1093 close(s); 1094 return(0); 1095 } 1096 1097 /*ARGSUSED*/ 1098 static void 1099 setifaddr(const char *addr, int param, int s, const struct afswtch *afp) 1100 { 1101 if (afp->af_getaddr == NULL) 1102 return; 1103 /* 1104 * Delay the ioctl to set the interface addr until flags are all set. 1105 * The address interpretation may depend on the flags, 1106 * and the flags may change when the address is set. 1107 */ 1108 setaddr++; 1109 if (doalias == 0 && afp->af_af != AF_LINK) 1110 clearaddr = 1; 1111 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); 1112 } 1113 1114 static void 1115 settunnel(const char *src, const char *dst, int s, const struct afswtch *afp) 1116 { 1117 struct addrinfo *srcres, *dstres; 1118 int ecode; 1119 1120 if (afp->af_settunnel == NULL) { 1121 warn("address family %s does not support tunnel setup", 1122 afp->af_name); 1123 return; 1124 } 1125 1126 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) 1127 errx(1, "error in parsing address string: %s", 1128 gai_strerror(ecode)); 1129 1130 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) 1131 errx(1, "error in parsing address string: %s", 1132 gai_strerror(ecode)); 1133 1134 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 1135 errx(1, 1136 "source and destination address families do not match"); 1137 1138 afp->af_settunnel(s, srcres, dstres); 1139 1140 freeaddrinfo(srcres); 1141 freeaddrinfo(dstres); 1142 } 1143 1144 /* ARGSUSED */ 1145 static void 1146 deletetunnel(const char *vname, int param, int s, const struct afswtch *afp) 1147 { 1148 1149 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0) 1150 err(1, "SIOCDIFPHYADDR"); 1151 } 1152 1153 #ifdef JAIL 1154 static void 1155 setifvnet(const char *jname, int dummy __unused, int s, 1156 const struct afswtch *afp) 1157 { 1158 struct ifreq my_ifr; 1159 1160 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 1161 my_ifr.ifr_jid = jail_getid(jname); 1162 if (my_ifr.ifr_jid < 0) 1163 errx(1, "%s", jail_errmsg); 1164 if (ioctl(s, SIOCSIFVNET, &my_ifr) < 0) 1165 err(1, "SIOCSIFVNET"); 1166 } 1167 1168 static void 1169 setifrvnet(const char *jname, int dummy __unused, int s, 1170 const struct afswtch *afp) 1171 { 1172 struct ifreq my_ifr; 1173 1174 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 1175 my_ifr.ifr_jid = jail_getid(jname); 1176 if (my_ifr.ifr_jid < 0) 1177 errx(1, "%s", jail_errmsg); 1178 if (ioctl(s, SIOCSIFRVNET, &my_ifr) < 0) 1179 err(1, "SIOCSIFRVNET(%d, %s)", my_ifr.ifr_jid, my_ifr.ifr_name); 1180 } 1181 #endif 1182 1183 static void 1184 setifnetmask(const char *addr, int dummy __unused, int s, 1185 const struct afswtch *afp) 1186 { 1187 if (afp->af_getaddr != NULL) { 1188 setmask++; 1189 afp->af_getaddr(addr, MASK); 1190 } 1191 } 1192 1193 static void 1194 setifbroadaddr(const char *addr, int dummy __unused, int s, 1195 const struct afswtch *afp) 1196 { 1197 if (afp->af_getaddr != NULL) 1198 afp->af_getaddr(addr, DSTADDR); 1199 } 1200 1201 static void 1202 notealias(const char *addr, int param, int s, const struct afswtch *afp) 1203 { 1204 #define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr)) 1205 if (setaddr && doalias == 0 && param < 0) 1206 if (afp->af_addreq != NULL && afp->af_ridreq != NULL) 1207 bcopy((caddr_t)rqtosa(af_addreq), 1208 (caddr_t)rqtosa(af_ridreq), 1209 rqtosa(af_addreq)->sa_len); 1210 doalias = param; 1211 if (param < 0) { 1212 clearaddr = 1; 1213 newaddr = 0; 1214 } else 1215 clearaddr = 0; 1216 #undef rqtosa 1217 } 1218 1219 /*ARGSUSED*/ 1220 static void 1221 setifdstaddr(const char *addr, int param __unused, int s, 1222 const struct afswtch *afp) 1223 { 1224 if (afp->af_getaddr != NULL) 1225 afp->af_getaddr(addr, DSTADDR); 1226 } 1227 1228 static int 1229 getifflags(const char *ifname, int us, bool err_ok) 1230 { 1231 struct ifreq my_ifr; 1232 int s; 1233 1234 memset(&my_ifr, 0, sizeof(my_ifr)); 1235 (void) strlcpy(my_ifr.ifr_name, ifname, sizeof(my_ifr.ifr_name)); 1236 if (us < 0) { 1237 if ((s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0) 1238 err(1, "socket(family AF_LOCAL,SOCK_DGRAM"); 1239 } else 1240 s = us; 1241 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) { 1242 if (!err_ok) { 1243 Perror("ioctl (SIOCGIFFLAGS)"); 1244 exit(1); 1245 } 1246 } 1247 if (us < 0) 1248 close(s); 1249 return ((my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16)); 1250 } 1251 1252 /* 1253 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion 1254 * of the ifreq structure, which may confuse other parts of ifconfig. 1255 * Make a private copy so we can avoid that. 1256 */ 1257 static void 1258 setifflags(const char *vname, int value, int s, const struct afswtch *afp) 1259 { 1260 struct ifreq my_ifr; 1261 int flags; 1262 1263 flags = getifflags(name, s, false); 1264 if (value < 0) { 1265 value = -value; 1266 flags &= ~value; 1267 } else 1268 flags |= value; 1269 memset(&my_ifr, 0, sizeof(my_ifr)); 1270 (void) strlcpy(my_ifr.ifr_name, name, sizeof(my_ifr.ifr_name)); 1271 my_ifr.ifr_flags = flags & 0xffff; 1272 my_ifr.ifr_flagshigh = flags >> 16; 1273 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0) 1274 Perror(vname); 1275 } 1276 1277 void 1278 setifcap(const char *vname, int value, int s, const struct afswtch *afp) 1279 { 1280 int flags; 1281 1282 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) { 1283 Perror("ioctl (SIOCGIFCAP)"); 1284 exit(1); 1285 } 1286 flags = ifr.ifr_curcap; 1287 if (value < 0) { 1288 value = -value; 1289 flags &= ~value; 1290 } else 1291 flags |= value; 1292 flags &= ifr.ifr_reqcap; 1293 /* Check for no change in capabilities. */ 1294 if (ifr.ifr_curcap == flags) 1295 return; 1296 ifr.ifr_reqcap = flags; 1297 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0) 1298 Perror(vname); 1299 } 1300 1301 void 1302 setifcapnv(const char *vname, const char *arg, int s, const struct afswtch *afp) 1303 { 1304 nvlist_t *nvcap; 1305 void *buf; 1306 char *marg, *mopt; 1307 size_t nvbuflen; 1308 bool neg; 1309 1310 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) 1311 Perror("ioctl (SIOCGIFCAP)"); 1312 if ((ifr.ifr_curcap & IFCAP_NV) == 0) { 1313 warnx("IFCAP_NV not supported"); 1314 return; /* Not exit() */ 1315 } 1316 1317 marg = strdup(arg); 1318 if (marg == NULL) 1319 Perror("strdup"); 1320 nvcap = nvlist_create(0); 1321 if (nvcap == NULL) 1322 Perror("nvlist_create"); 1323 while ((mopt = strsep(&marg, ",")) != NULL) { 1324 neg = *mopt == '-'; 1325 if (neg) 1326 mopt++; 1327 if (strcmp(mopt, "rxtls") == 0) { 1328 nvlist_add_bool(nvcap, "rxtls4", !neg); 1329 nvlist_add_bool(nvcap, "rxtls6", !neg); 1330 } else { 1331 nvlist_add_bool(nvcap, mopt, !neg); 1332 } 1333 } 1334 buf = nvlist_pack(nvcap, &nvbuflen); 1335 if (buf == NULL) { 1336 errx(1, "nvlist_pack error"); 1337 exit(1); 1338 } 1339 ifr.ifr_cap_nv.buf_length = ifr.ifr_cap_nv.length = nvbuflen; 1340 ifr.ifr_cap_nv.buffer = buf; 1341 if (ioctl(s, SIOCSIFCAPNV, (caddr_t)&ifr) < 0) 1342 Perror(vname); 1343 free(buf); 1344 nvlist_destroy(nvcap); 1345 free(marg); 1346 } 1347 1348 static void 1349 setifmetric(const char *val, int dummy __unused, int s, 1350 const struct afswtch *afp) 1351 { 1352 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 1353 ifr.ifr_metric = atoi(val); 1354 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0) 1355 err(1, "ioctl SIOCSIFMETRIC (set metric)"); 1356 } 1357 1358 static void 1359 setifmtu(const char *val, int dummy __unused, int s, 1360 const struct afswtch *afp) 1361 { 1362 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 1363 ifr.ifr_mtu = atoi(val); 1364 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0) 1365 err(1, "ioctl SIOCSIFMTU (set mtu)"); 1366 } 1367 1368 static void 1369 setifpcp(const char *val, int arg __unused, int s, const struct afswtch *afp) 1370 { 1371 u_long ul; 1372 char *endp; 1373 1374 ul = strtoul(val, &endp, 0); 1375 if (*endp != '\0') 1376 errx(1, "invalid value for pcp"); 1377 if (ul > 7) 1378 errx(1, "value for pcp out of range"); 1379 ifr.ifr_lan_pcp = ul; 1380 if (ioctl(s, SIOCSLANPCP, (caddr_t)&ifr) == -1) 1381 err(1, "SIOCSLANPCP"); 1382 } 1383 1384 static void 1385 disableifpcp(const char *val, int arg __unused, int s, 1386 const struct afswtch *afp) 1387 { 1388 1389 ifr.ifr_lan_pcp = IFNET_PCP_NONE; 1390 if (ioctl(s, SIOCSLANPCP, (caddr_t)&ifr) == -1) 1391 err(1, "SIOCSLANPCP"); 1392 } 1393 1394 static void 1395 setifname(const char *val, int dummy __unused, int s, 1396 const struct afswtch *afp) 1397 { 1398 char *newname; 1399 1400 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 1401 1402 newname = strdup(val); 1403 if (newname == NULL) 1404 err(1, "no memory to set ifname"); 1405 ifr.ifr_data = newname; 1406 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 1407 free(newname); 1408 err(1, "ioctl SIOCSIFNAME (set name)"); 1409 } 1410 printifname = 1; 1411 strlcpy(name, newname, sizeof(name)); 1412 free(newname); 1413 } 1414 1415 /* ARGSUSED */ 1416 static void 1417 setifdescr(const char *val, int dummy __unused, int s, 1418 const struct afswtch *afp) 1419 { 1420 char *newdescr; 1421 1422 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 1423 1424 ifr.ifr_buffer.length = strlen(val) + 1; 1425 if (ifr.ifr_buffer.length == 1) { 1426 ifr.ifr_buffer.buffer = newdescr = NULL; 1427 ifr.ifr_buffer.length = 0; 1428 } else { 1429 newdescr = strdup(val); 1430 ifr.ifr_buffer.buffer = newdescr; 1431 if (newdescr == NULL) { 1432 warn("no memory to set ifdescr"); 1433 return; 1434 } 1435 } 1436 1437 if (ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) 1438 err(1, "ioctl SIOCSIFDESCR (set descr)"); 1439 1440 free(newdescr); 1441 } 1442 1443 /* ARGSUSED */ 1444 static void 1445 unsetifdescr(const char *val, int value, int s, const struct afswtch *afp) 1446 { 1447 1448 setifdescr("", 0, s, 0); 1449 } 1450 1451 #define IFFBITS \ 1452 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\7RUNNING" \ 1453 "\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ 1454 "\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP\25STICKYARP" 1455 1456 #define IFCAPBITS \ 1457 "\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \ 1458 "\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \ 1459 "\17TOE4\20TOE6\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE\25NETMAP" \ 1460 "\26RXCSUM_IPV6\27TXCSUM_IPV6\31TXRTLMT\32HWRXTSTMP\33NOMAP\34TXTLS4\35TXTLS6" \ 1461 "\36VXLAN_HWCSUM\37VXLAN_HWTSO\40TXTLS_RTLMT" 1462 1463 static void 1464 print_ifcap_nv(struct ifconfig_args *args, int s) 1465 { 1466 nvlist_t *nvcap; 1467 const char *nvname; 1468 void *buf, *cookie; 1469 bool first, val; 1470 int type; 1471 1472 buf = malloc(IFR_CAP_NV_MAXBUFSIZE); 1473 if (buf == NULL) 1474 Perror("malloc"); 1475 ifr.ifr_cap_nv.buffer = buf; 1476 ifr.ifr_cap_nv.buf_length = IFR_CAP_NV_MAXBUFSIZE; 1477 if (ioctl(s, SIOCGIFCAPNV, (caddr_t)&ifr) != 0) 1478 Perror("ioctl (SIOCGIFCAPNV)"); 1479 nvcap = nvlist_unpack(ifr.ifr_cap_nv.buffer, 1480 ifr.ifr_cap_nv.length, 0); 1481 if (nvcap == NULL) 1482 Perror("nvlist_unpack"); 1483 printf("\toptions"); 1484 cookie = NULL; 1485 for (first = true;; first = false) { 1486 nvname = nvlist_next(nvcap, &type, &cookie); 1487 if (nvname == NULL) { 1488 printf("\n"); 1489 break; 1490 } 1491 if (type == NV_TYPE_BOOL) { 1492 val = nvlist_get_bool(nvcap, nvname); 1493 if (val) { 1494 printf("%c%s", 1495 first ? ' ' : ',', nvname); 1496 } 1497 } 1498 } 1499 if (args->supmedia) { 1500 printf("\tcapabilities"); 1501 cookie = NULL; 1502 for (first = true;; first = false) { 1503 nvname = nvlist_next(nvcap, &type, 1504 &cookie); 1505 if (nvname == NULL) { 1506 printf("\n"); 1507 break; 1508 } 1509 if (type == NV_TYPE_BOOL) 1510 printf("%c%s", first ? ' ' : 1511 ',', nvname); 1512 } 1513 } 1514 nvlist_destroy(nvcap); 1515 free(buf); 1516 1517 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) != 0) 1518 Perror("ioctl (SIOCGIFCAP)"); 1519 } 1520 1521 void 1522 print_ifcap(struct ifconfig_args *args, int s) 1523 { 1524 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) != 0) 1525 return; 1526 1527 if ((ifr.ifr_curcap & IFCAP_NV) != 0) 1528 print_ifcap_nv(args, s); 1529 else { 1530 printb("\toptions", ifr.ifr_curcap, IFCAPBITS); 1531 putchar('\n'); 1532 if (args->supmedia && ifr.ifr_reqcap != 0) { 1533 printb("\tcapabilities", ifr.ifr_reqcap, 1534 IFCAPBITS); 1535 putchar('\n'); 1536 } 1537 } 1538 } 1539 1540 void 1541 print_ifstatus(int s) 1542 { 1543 struct ifstat ifs; 1544 1545 strlcpy(ifs.ifs_name, name, sizeof ifs.ifs_name); 1546 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0) 1547 printf("%s", ifs.ascii); 1548 } 1549 1550 void 1551 print_metric(int s) 1552 { 1553 if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1) 1554 printf(" metric %d", ifr.ifr_metric); 1555 } 1556 1557 #ifdef WITHOUT_NETLINK 1558 static void 1559 print_mtu(int s) 1560 { 1561 if (ioctl(s, SIOCGIFMTU, &ifr) != -1) 1562 printf(" mtu %d", ifr.ifr_mtu); 1563 } 1564 1565 static void 1566 print_description(int s) 1567 { 1568 for (;;) { 1569 if ((descr = reallocf(descr, descrlen)) != NULL) { 1570 ifr.ifr_buffer.buffer = descr; 1571 ifr.ifr_buffer.length = descrlen; 1572 if (ioctl(s, SIOCGIFDESCR, &ifr) == 0) { 1573 if (ifr.ifr_buffer.buffer == descr) { 1574 if (strlen(descr) > 0) 1575 printf("\tdescription: %s\n", 1576 descr); 1577 } else if (ifr.ifr_buffer.length > descrlen) { 1578 descrlen = ifr.ifr_buffer.length; 1579 continue; 1580 } 1581 } 1582 } else 1583 warn("unable to allocate memory for interface" 1584 "description"); 1585 break; 1586 } 1587 } 1588 1589 /* 1590 * Print the status of the interface. If an address family was 1591 * specified, show only it; otherwise, show them all. 1592 */ 1593 static void 1594 status(struct ifconfig_args *args, const struct sockaddr_dl *sdl, 1595 struct ifaddrs *ifa) 1596 { 1597 struct ifaddrs *ift; 1598 int s; 1599 bool allfamilies = args->afp == NULL; 1600 1601 if (args->afp == NULL) 1602 ifr.ifr_addr.sa_family = AF_LOCAL; 1603 else 1604 ifr.ifr_addr.sa_family = 1605 args->afp->af_af == AF_LINK ? AF_LOCAL : args->afp->af_af; 1606 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 1607 1608 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0); 1609 if (s < 0) 1610 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 1611 1612 printf("%s: ", name); 1613 printb("flags", ifa->ifa_flags, IFFBITS); 1614 print_metric(s); 1615 print_mtu(s); 1616 putchar('\n'); 1617 1618 print_description(s); 1619 1620 print_ifcap(args, s); 1621 1622 tunnel_status(s); 1623 1624 for (ift = ifa; ift != NULL; ift = ift->ifa_next) { 1625 if (ift->ifa_addr == NULL) 1626 continue; 1627 if (strcmp(ifa->ifa_name, ift->ifa_name) != 0) 1628 continue; 1629 if (allfamilies) { 1630 const struct afswtch *p; 1631 p = af_getbyfamily(ift->ifa_addr->sa_family); 1632 if (p != NULL && p->af_status != NULL) 1633 p->af_status(s, ift); 1634 } else if (args->afp->af_af == ift->ifa_addr->sa_family) 1635 args->afp->af_status(s, ift); 1636 } 1637 #if 0 1638 if (allfamilies || afp->af_af == AF_LINK) { 1639 const struct afswtch *lafp; 1640 1641 /* 1642 * Hack; the link level address is received separately 1643 * from the routing information so any address is not 1644 * handled above. Cobble together an entry and invoke 1645 * the status method specially. 1646 */ 1647 lafp = af_getbyname("lladdr"); 1648 if (lafp != NULL) { 1649 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; 1650 lafp->af_status(s, &info); 1651 } 1652 } 1653 #endif 1654 if (allfamilies) 1655 af_other_status(s); 1656 else if (args->afp->af_other_status != NULL) 1657 args->afp->af_other_status(s); 1658 1659 print_ifstatus(s); 1660 if (args->verbose > 0) 1661 sfp_status(s, &ifr, args->verbose); 1662 1663 close(s); 1664 return; 1665 } 1666 #endif 1667 1668 void 1669 tunnel_status(int s) 1670 { 1671 af_all_tunnel_status(s); 1672 } 1673 1674 void 1675 Perror(const char *cmd) 1676 { 1677 switch (errno) { 1678 1679 case ENXIO: 1680 errx(1, "%s: no such interface", cmd); 1681 break; 1682 1683 case EPERM: 1684 errx(1, "%s: permission denied", cmd); 1685 break; 1686 1687 default: 1688 err(1, "%s", cmd); 1689 } 1690 } 1691 1692 /* 1693 * Print a value a la the %b format of the kernel's printf 1694 */ 1695 void 1696 printb(const char *s, unsigned v, const char *bits) 1697 { 1698 int i, any = 0; 1699 char c; 1700 1701 if (bits && *bits == 8) 1702 printf("%s=%o", s, v); 1703 else 1704 printf("%s=%x", s, v); 1705 if (bits) { 1706 bits++; 1707 putchar('<'); 1708 while ((i = *bits++) != '\0') { 1709 if (v & (1u << (i-1))) { 1710 if (any) 1711 putchar(','); 1712 any = 1; 1713 for (; (c = *bits) > 32; bits++) 1714 putchar(c); 1715 } else 1716 for (; *bits > 32; bits++) 1717 ; 1718 } 1719 putchar('>'); 1720 } 1721 } 1722 1723 void 1724 print_vhid(const struct ifaddrs *ifa, const char *s) 1725 { 1726 struct if_data *ifd; 1727 1728 if (ifa->ifa_data == NULL) 1729 return; 1730 1731 ifd = ifa->ifa_data; 1732 if (ifd->ifi_vhid == 0) 1733 return; 1734 1735 printf(" vhid %d", ifd->ifi_vhid); 1736 } 1737 1738 void 1739 ifmaybeload(struct ifconfig_args *args, const char *name) 1740 { 1741 #define MOD_PREFIX_LEN 3 /* "if_" */ 1742 struct module_stat mstat; 1743 int i, fileid, modid; 1744 char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp; 1745 const char *cp; 1746 struct module_map_entry *mme; 1747 bool found; 1748 1749 /* loading suppressed by the user */ 1750 if (args->noload) 1751 return; 1752 1753 /* trim the interface number off the end */ 1754 strlcpy(ifname, name, sizeof(ifname)); 1755 dp = ifname + strlen(ifname) - 1; 1756 for (; dp > ifname; dp--) { 1757 if (isdigit(*dp)) 1758 *dp = '\0'; 1759 else 1760 break; 1761 } 1762 1763 /* Either derive it from the map or guess otherwise */ 1764 *ifkind = '\0'; 1765 found = false; 1766 for (i = 0; i < nitems(module_map); ++i) { 1767 mme = &module_map[i]; 1768 if (strcmp(mme->ifname, ifname) == 0) { 1769 strlcpy(ifkind, mme->kldname, sizeof(ifkind)); 1770 found = true; 1771 break; 1772 } 1773 } 1774 1775 /* We didn't have an alias for it... we'll guess. */ 1776 if (!found) { 1777 /* turn interface and unit into module name */ 1778 strlcpy(ifkind, "if_", sizeof(ifkind)); 1779 strlcat(ifkind, ifname, sizeof(ifkind)); 1780 } 1781 1782 /* scan files in kernel */ 1783 mstat.version = sizeof(struct module_stat); 1784 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { 1785 /* scan modules in file */ 1786 for (modid = kldfirstmod(fileid); modid > 0; 1787 modid = modfnext(modid)) { 1788 if (modstat(modid, &mstat) < 0) 1789 continue; 1790 /* strip bus name if present */ 1791 if ((cp = strchr(mstat.name, '/')) != NULL) { 1792 cp++; 1793 } else { 1794 cp = mstat.name; 1795 } 1796 /* 1797 * Is it already loaded? Don't compare with ifname if 1798 * we were specifically told which kld to use. Doing 1799 * so could lead to conflicts not trivially solved. 1800 */ 1801 if ((!found && strcmp(ifname, cp) == 0) || 1802 strcmp(ifkind, cp) == 0) 1803 return; 1804 } 1805 } 1806 1807 /* 1808 * Try to load the module. But ignore failures, because ifconfig can't 1809 * infer the names of all drivers (eg mlx4en(4)). 1810 */ 1811 (void) kldload(ifkind); 1812 } 1813 1814 static struct cmd basic_cmds[] = { 1815 DEF_CMD("up", IFF_UP, setifflags), 1816 DEF_CMD("down", -IFF_UP, setifflags), 1817 DEF_CMD("arp", -IFF_NOARP, setifflags), 1818 DEF_CMD("-arp", IFF_NOARP, setifflags), 1819 DEF_CMD("debug", IFF_DEBUG, setifflags), 1820 DEF_CMD("-debug", -IFF_DEBUG, setifflags), 1821 DEF_CMD_ARG("description", setifdescr), 1822 DEF_CMD_ARG("descr", setifdescr), 1823 DEF_CMD("-description", 0, unsetifdescr), 1824 DEF_CMD("-descr", 0, unsetifdescr), 1825 DEF_CMD("promisc", IFF_PPROMISC, setifflags), 1826 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags), 1827 DEF_CMD("add", IFF_UP, notealias), 1828 DEF_CMD("alias", IFF_UP, notealias), 1829 DEF_CMD("-alias", -IFF_UP, notealias), 1830 DEF_CMD("delete", -IFF_UP, notealias), 1831 DEF_CMD("remove", -IFF_UP, notealias), 1832 #ifdef notdef 1833 #define EN_SWABIPS 0x1000 1834 DEF_CMD("swabips", EN_SWABIPS, setifflags), 1835 DEF_CMD("-swabips", -EN_SWABIPS, setifflags), 1836 #endif 1837 DEF_CMD_ARG("netmask", setifnetmask), 1838 DEF_CMD_ARG("metric", setifmetric), 1839 DEF_CMD_ARG("broadcast", setifbroadaddr), 1840 DEF_CMD_ARG2("tunnel", settunnel), 1841 DEF_CMD("-tunnel", 0, deletetunnel), 1842 DEF_CMD("deletetunnel", 0, deletetunnel), 1843 #ifdef JAIL 1844 DEF_CMD_ARG("vnet", setifvnet), 1845 DEF_CMD_ARG("-vnet", setifrvnet), 1846 #endif 1847 DEF_CMD("link0", IFF_LINK0, setifflags), 1848 DEF_CMD("-link0", -IFF_LINK0, setifflags), 1849 DEF_CMD("link1", IFF_LINK1, setifflags), 1850 DEF_CMD("-link1", -IFF_LINK1, setifflags), 1851 DEF_CMD("link2", IFF_LINK2, setifflags), 1852 DEF_CMD("-link2", -IFF_LINK2, setifflags), 1853 DEF_CMD("monitor", IFF_MONITOR, setifflags), 1854 DEF_CMD("-monitor", -IFF_MONITOR, setifflags), 1855 DEF_CMD("mextpg", IFCAP_MEXTPG, setifcap), 1856 DEF_CMD("-mextpg", -IFCAP_MEXTPG, setifcap), 1857 DEF_CMD("staticarp", IFF_STATICARP, setifflags), 1858 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), 1859 DEF_CMD("stickyarp", IFF_STICKYARP, setifflags), 1860 DEF_CMD("-stickyarp", -IFF_STICKYARP, setifflags), 1861 DEF_CMD("rxcsum6", IFCAP_RXCSUM_IPV6, setifcap), 1862 DEF_CMD("-rxcsum6", -IFCAP_RXCSUM_IPV6, setifcap), 1863 DEF_CMD("txcsum6", IFCAP_TXCSUM_IPV6, setifcap), 1864 DEF_CMD("-txcsum6", -IFCAP_TXCSUM_IPV6, setifcap), 1865 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), 1866 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), 1867 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), 1868 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), 1869 DEF_CMD("netcons", IFCAP_NETCONS, setifcap), 1870 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), 1871 DEF_CMD_ARG("pcp", setifpcp), 1872 DEF_CMD("-pcp", 0, disableifpcp), 1873 DEF_CMD("polling", IFCAP_POLLING, setifcap), 1874 DEF_CMD("-polling", -IFCAP_POLLING, setifcap), 1875 DEF_CMD("tso6", IFCAP_TSO6, setifcap), 1876 DEF_CMD("-tso6", -IFCAP_TSO6, setifcap), 1877 DEF_CMD("tso4", IFCAP_TSO4, setifcap), 1878 DEF_CMD("-tso4", -IFCAP_TSO4, setifcap), 1879 DEF_CMD("tso", IFCAP_TSO, setifcap), 1880 DEF_CMD("-tso", -IFCAP_TSO, setifcap), 1881 DEF_CMD("toe", IFCAP_TOE, setifcap), 1882 DEF_CMD("-toe", -IFCAP_TOE, setifcap), 1883 DEF_CMD("lro", IFCAP_LRO, setifcap), 1884 DEF_CMD("-lro", -IFCAP_LRO, setifcap), 1885 DEF_CMD("txtls", IFCAP_TXTLS, setifcap), 1886 DEF_CMD("-txtls", -IFCAP_TXTLS, setifcap), 1887 DEF_CMD_SARG("rxtls", IFCAP2_RXTLS4_NAME "," IFCAP2_RXTLS6_NAME, 1888 setifcapnv), 1889 DEF_CMD_SARG("-rxtls", "-"IFCAP2_RXTLS4_NAME ",-" IFCAP2_RXTLS6_NAME, 1890 setifcapnv), 1891 DEF_CMD("wol", IFCAP_WOL, setifcap), 1892 DEF_CMD("-wol", -IFCAP_WOL, setifcap), 1893 DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap), 1894 DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap), 1895 DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap), 1896 DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap), 1897 DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap), 1898 DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap), 1899 DEF_CMD("txrtlmt", IFCAP_TXRTLMT, setifcap), 1900 DEF_CMD("-txrtlmt", -IFCAP_TXRTLMT, setifcap), 1901 DEF_CMD("txtlsrtlmt", IFCAP_TXTLS_RTLMT, setifcap), 1902 DEF_CMD("-txtlsrtlmt", -IFCAP_TXTLS_RTLMT, setifcap), 1903 DEF_CMD("hwrxtstmp", IFCAP_HWRXTSTMP, setifcap), 1904 DEF_CMD("-hwrxtstmp", -IFCAP_HWRXTSTMP, setifcap), 1905 DEF_CMD("normal", -IFF_LINK0, setifflags), 1906 DEF_CMD("compress", IFF_LINK0, setifflags), 1907 DEF_CMD("noicmp", IFF_LINK1, setifflags), 1908 DEF_CMD_ARG("mtu", setifmtu), 1909 DEF_CMD_ARG("name", setifname), 1910 }; 1911 1912 static __constructor void 1913 ifconfig_ctor(void) 1914 { 1915 size_t i; 1916 1917 for (i = 0; i < nitems(basic_cmds); i++) 1918 cmd_register(&basic_cmds[i]); 1919 } 1920