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 #ifdef JAIL 46 #include <sys/jail.h> 47 #endif 48 #include <sys/module.h> 49 #include <sys/linker.h> 50 #include <sys/nv.h> 51 #include <sys/queue.h> 52 #include <sys/socket.h> 53 #include <sys/time.h> 54 55 #include <net/ethernet.h> 56 #include <net/if.h> 57 #include <net/if_dl.h> 58 #include <net/if_types.h> 59 #include <net/route.h> 60 61 /* IP */ 62 #include <netinet/in.h> 63 #include <netinet/in_var.h> 64 #include <arpa/inet.h> 65 #include <netdb.h> 66 67 #include <fnmatch.h> 68 #include <ifaddrs.h> 69 #include <ctype.h> 70 #include <err.h> 71 #include <errno.h> 72 #include <fcntl.h> 73 #ifdef JAIL 74 #include <jail.h> 75 #endif 76 #include <stdbool.h> 77 #include <stdio.h> 78 #include <stdlib.h> 79 #include <string.h> 80 #include <unistd.h> 81 82 #include <libifconfig.h> 83 84 #include "ifconfig.h" 85 86 ifconfig_handle_t *lifh; 87 88 /* 89 * Since "struct ifreq" is composed of various union members, callers 90 * should pay special attention to interpret the value. 91 * (.e.g. little/big endian difference in the structure.) 92 */ 93 struct ifreq ifr; 94 95 //char name[IFNAMSIZ]; 96 #ifdef WITHOUT_NETLINK 97 static char *descr = NULL; 98 static size_t descrlen = 64; 99 #endif 100 static int setaddr; 101 static int setmask; 102 static int doalias; 103 static int clearaddr; 104 int newaddr = 1; 105 106 int exit_code = 0; 107 108 static char ifname_to_print[IFNAMSIZ]; /* Helper for printifnamemaybe() */ 109 110 /* Formatter Strings */ 111 char *f_inet, *f_inet6, *f_ether, *f_addr; 112 113 #ifdef WITHOUT_NETLINK 114 static void list_interfaces_ioctl(struct ifconfig_args *args); 115 static void status(struct ifconfig_args *args, const struct sockaddr_dl *sdl, 116 struct ifaddrs *ifa); 117 #endif 118 static _Noreturn void usage(void); 119 static void Perrorc(const char *cmd, int error); 120 121 static int getifflags(const char *ifname, int us, bool err_ok); 122 123 static struct afswtch *af_getbyname(const char *name); 124 125 static struct option *opts = NULL; 126 127 struct ifa_order_elt { 128 int if_order; 129 int af_orders[255]; 130 struct ifaddrs *ifa; 131 TAILQ_ENTRY(ifa_order_elt) link; 132 }; 133 134 TAILQ_HEAD(ifa_queue, ifa_order_elt); 135 136 static struct module_map_entry { 137 const char *ifname; 138 const char *kldname; 139 } module_map[] = { 140 { 141 .ifname = "tun", 142 .kldname = "if_tuntap", 143 }, 144 { 145 .ifname = "tap", 146 .kldname = "if_tuntap", 147 }, 148 { 149 .ifname = "vmnet", 150 .kldname = "if_tuntap", 151 }, 152 { 153 .ifname = "ipsec", 154 .kldname = "ipsec", 155 }, 156 { 157 /* 158 * This mapping exists because there is a conflicting enc module 159 * in CAM. ifconfig's guessing behavior will attempt to match 160 * the ifname to a module as well as if_${ifname} and clash with 161 * CAM enc. This is an assertion of the correct module to load. 162 */ 163 .ifname = "enc", 164 .kldname = "if_enc", 165 }, 166 }; 167 168 169 void 170 opt_register(struct option *p) 171 { 172 p->next = opts; 173 opts = p; 174 } 175 176 static void 177 usage(void) 178 { 179 char options[1024]; 180 struct option *p; 181 182 /* XXX not right but close enough for now */ 183 options[0] = '\0'; 184 for (p = opts; p != NULL; p = p->next) { 185 strlcat(options, p->opt_usage, sizeof(options)); 186 strlcat(options, " ", sizeof(options)); 187 } 188 189 fprintf(stderr, 190 "usage: ifconfig [-j jail] [-f type:format] %sinterface address_family\n" 191 " [address [dest_address]] [parameters]\n" 192 " ifconfig [-j jail] interface create\n" 193 " ifconfig [-j jail] -a %s[-d] [-m] [-u] [-v] [address_family]\n" 194 " ifconfig [-j jail] -l [-d] [-u] [address_family]\n" 195 " ifconfig [-j jail] %s[-d] [-m] [-u] [-v]\n", 196 options, options, options); 197 exit(1); 198 } 199 200 static void 201 ifname_update(if_ctx *ctx, const char *name) 202 { 203 strlcpy(ctx->_ifname_storage_ioctl, name, sizeof(ctx->_ifname_storage_ioctl)); 204 ctx->ifname = ctx->_ifname_storage_ioctl; 205 206 strlcpy(ifname_to_print, name, sizeof(ifname_to_print)); 207 } 208 209 void 210 ifcreate_ioctl(if_ctx *ctx, struct ifreq *ifr) 211 { 212 char ifname_orig[IFNAMSIZ]; 213 214 strlcpy(ifname_orig, ifr->ifr_name, sizeof(ifname_orig)); 215 216 if (ioctl(ctx->io_s, SIOCIFCREATE2, ifr) < 0) { 217 switch (errno) { 218 case EEXIST: 219 errx(1, "interface %s already exists", ifr->ifr_name); 220 default: 221 err(1, "SIOCIFCREATE2 (%s)", ifr->ifr_name); 222 } 223 } 224 225 if (strncmp(ifname_orig, ifr->ifr_name, sizeof(ifname_orig)) != 0) 226 ifname_update(ctx, ifr->ifr_name); 227 } 228 229 #ifdef WITHOUT_NETLINK 230 static int 231 calcorders(struct ifaddrs *ifa, struct ifa_queue *q) 232 { 233 struct ifaddrs *prev; 234 struct ifa_order_elt *cur; 235 unsigned int ord, af, ifa_ord; 236 237 prev = NULL; 238 cur = NULL; 239 ord = 0; 240 ifa_ord = 0; 241 242 while (ifa != NULL) { 243 if (prev == NULL || 244 strcmp(ifa->ifa_name, prev->ifa_name) != 0) { 245 cur = calloc(1, sizeof(*cur)); 246 247 if (cur == NULL) 248 return (-1); 249 250 TAILQ_INSERT_TAIL(q, cur, link); 251 cur->if_order = ifa_ord ++; 252 cur->ifa = ifa; 253 ord = 0; 254 } 255 256 if (ifa->ifa_addr) { 257 af = ifa->ifa_addr->sa_family; 258 259 if (af < nitems(cur->af_orders) && 260 cur->af_orders[af] == 0) 261 cur->af_orders[af] = ++ord; 262 } 263 prev = ifa; 264 ifa = ifa->ifa_next; 265 } 266 267 return (0); 268 } 269 270 static int 271 cmpifaddrs(struct ifaddrs *a, struct ifaddrs *b, struct ifa_queue *q) 272 { 273 struct ifa_order_elt *cur, *e1, *e2; 274 unsigned int af1, af2; 275 int ret; 276 277 e1 = e2 = NULL; 278 279 ret = strcmp(a->ifa_name, b->ifa_name); 280 if (ret != 0) { 281 TAILQ_FOREACH(cur, q, link) { 282 if (e1 && e2) 283 break; 284 285 if (strcmp(cur->ifa->ifa_name, a->ifa_name) == 0) 286 e1 = cur; 287 else if (strcmp(cur->ifa->ifa_name, b->ifa_name) == 0) 288 e2 = cur; 289 } 290 291 if (!e1 || !e2) 292 return (0); 293 else 294 return (e1->if_order - e2->if_order); 295 296 } else if (a->ifa_addr != NULL && b->ifa_addr != NULL) { 297 TAILQ_FOREACH(cur, q, link) { 298 if (strcmp(cur->ifa->ifa_name, a->ifa_name) == 0) { 299 e1 = cur; 300 break; 301 } 302 } 303 304 if (!e1) 305 return (0); 306 307 af1 = a->ifa_addr->sa_family; 308 af2 = b->ifa_addr->sa_family; 309 310 if (af1 < nitems(e1->af_orders) && af2 < nitems(e1->af_orders)) 311 return (e1->af_orders[af1] - e1->af_orders[af2]); 312 } 313 314 return (0); 315 } 316 #endif 317 318 static void freeformat(void) 319 { 320 321 if (f_inet != NULL) 322 free(f_inet); 323 if (f_inet6 != NULL) 324 free(f_inet6); 325 if (f_ether != NULL) 326 free(f_ether); 327 if (f_addr != NULL) 328 free(f_addr); 329 } 330 331 static void setformat(char *input) 332 { 333 char *formatstr, *category, *modifier; 334 335 formatstr = strdup(input); 336 while ((category = strsep(&formatstr, ",")) != NULL) { 337 modifier = strchr(category, ':'); 338 if (modifier == NULL || modifier[1] == '\0') { 339 warnx("Skipping invalid format specification: %s\n", 340 category); 341 continue; 342 } 343 344 /* Split the string on the separator, then seek past it */ 345 modifier[0] = '\0'; 346 modifier++; 347 348 if (strcmp(category, "addr") == 0) 349 f_addr = strdup(modifier); 350 else if (strcmp(category, "ether") == 0) 351 f_ether = strdup(modifier); 352 else if (strcmp(category, "inet") == 0) 353 f_inet = strdup(modifier); 354 else if (strcmp(category, "inet6") == 0) 355 f_inet6 = strdup(modifier); 356 } 357 free(formatstr); 358 } 359 360 #ifdef WITHOUT_NETLINK 361 static struct ifaddrs * 362 sortifaddrs(struct ifaddrs *list, 363 int (*compare)(struct ifaddrs *, struct ifaddrs *, struct ifa_queue *), 364 struct ifa_queue *q) 365 { 366 struct ifaddrs *right, *temp, *last, *result, *next, *tail; 367 368 right = list; 369 temp = list; 370 last = list; 371 result = NULL; 372 next = NULL; 373 tail = NULL; 374 375 if (!list || !list->ifa_next) 376 return (list); 377 378 while (temp && temp->ifa_next) { 379 last = right; 380 right = right->ifa_next; 381 temp = temp->ifa_next->ifa_next; 382 } 383 384 last->ifa_next = NULL; 385 386 list = sortifaddrs(list, compare, q); 387 right = sortifaddrs(right, compare, q); 388 389 while (list || right) { 390 391 if (!right) { 392 next = list; 393 list = list->ifa_next; 394 } else if (!list) { 395 next = right; 396 right = right->ifa_next; 397 } else if (compare(list, right, q) <= 0) { 398 next = list; 399 list = list->ifa_next; 400 } else { 401 next = right; 402 right = right->ifa_next; 403 } 404 405 if (!result) 406 result = next; 407 else 408 tail->ifa_next = next; 409 410 tail = next; 411 } 412 413 return (result); 414 } 415 #endif 416 417 static void 418 printifnamemaybe(void) 419 { 420 if (ifname_to_print[0] != '\0') 421 printf("%s\n", ifname_to_print); 422 } 423 424 static void 425 list_interfaces(struct ifconfig_args *args) 426 { 427 #ifdef WITHOUT_NETLINK 428 list_interfaces_ioctl(args); 429 #else 430 list_interfaces_nl(args); 431 #endif 432 } 433 434 static char * 435 args_peek(struct ifconfig_args *args) 436 { 437 if (args->argc > 0) 438 return (args->argv[0]); 439 return (NULL); 440 } 441 442 static char * 443 args_pop(struct ifconfig_args *args) 444 { 445 if (args->argc == 0) 446 return (NULL); 447 448 char *arg = args->argv[0]; 449 450 args->argc--; 451 args->argv++; 452 453 return (arg); 454 } 455 456 static void 457 args_parse(struct ifconfig_args *args, int argc, char *argv[]) 458 { 459 char options[1024]; 460 struct option *p; 461 int c; 462 463 /* Parse leading line options */ 464 strlcpy(options, "G:adf:j:klmnuv", sizeof(options)); 465 for (p = opts; p != NULL; p = p->next) 466 strlcat(options, p->opt, sizeof(options)); 467 while ((c = getopt(argc, argv, options)) != -1) { 468 switch (c) { 469 case 'a': /* scan all interfaces */ 470 args->all = true; 471 break; 472 case 'd': /* restrict scan to "down" interfaces */ 473 args->downonly = true; 474 break; 475 case 'f': 476 if (optarg == NULL) 477 usage(); 478 setformat(optarg); 479 break; 480 case 'G': 481 if (optarg == NULL || args->all == 0) 482 usage(); 483 args->nogroup = optarg; 484 break; 485 case 'j': 486 #ifdef JAIL 487 if (optarg == NULL) 488 usage(); 489 args->jail_name = optarg; 490 #else 491 Perror("not built with jail support"); 492 #endif 493 break; 494 case 'k': 495 args->printkeys = true; 496 break; 497 case 'l': /* scan interface names only */ 498 args->namesonly++; 499 break; 500 case 'm': /* show media choices in status */ 501 args->supmedia = true; 502 break; 503 case 'n': /* suppress module loading */ 504 args->noload = true; 505 break; 506 case 'u': /* restrict scan to "up" interfaces */ 507 args->uponly = true; 508 break; 509 case 'v': 510 args->verbose++; 511 break; 512 case 'g': 513 if (args->all) { 514 if (optarg == NULL) 515 usage(); 516 args->matchgroup = optarg; 517 break; 518 } 519 /* FALLTHROUGH */ 520 default: 521 for (p = opts; p != NULL; p = p->next) 522 if (p->opt[0] == c) { 523 p->cb(optarg); 524 break; 525 } 526 if (p == NULL) 527 usage(); 528 break; 529 } 530 } 531 argc -= optind; 532 argv += optind; 533 534 /* -l cannot be used with -a or -m */ 535 if (args->namesonly && (args->all || args->supmedia)) 536 usage(); 537 538 /* nonsense.. */ 539 if (args->uponly && args->downonly) 540 usage(); 541 542 /* no arguments is equivalent to '-a' */ 543 if (!args->namesonly && argc < 1) 544 args->all = 1; 545 546 /* -a and -l allow an address family arg to limit the output */ 547 if (args->all || args->namesonly) { 548 if (argc > 1) 549 usage(); 550 551 if (argc == 1) { 552 const struct afswtch *afp = af_getbyname(*argv); 553 554 if (afp == NULL) { 555 warnx("Address family '%s' unknown.", *argv); 556 usage(); 557 } 558 if (afp->af_name != NULL) 559 argc--, argv++; 560 /* leave with afp non-zero */ 561 args->afp = afp; 562 } 563 } else { 564 /* not listing, need an argument */ 565 if (argc < 1) 566 usage(); 567 } 568 569 args->argc = argc; 570 args->argv = argv; 571 } 572 573 static int 574 ifconfig_wrapper(struct ifconfig_args *args, int iscreate, 575 const struct afswtch *uafp) 576 { 577 struct ifconfig_context ctx = { 578 .args = args, 579 .io_s = -1, 580 .ifname = args->ifname, 581 }; 582 583 #ifdef WITHOUT_NETLINK 584 return (ifconfig(&ctx, iscreate, uafp)); 585 #else 586 return (ifconfig_wrapper_nl(&ctx, iscreate, uafp)); 587 #endif 588 } 589 590 static bool 591 isargcreate(const char *arg) 592 { 593 if (arg == NULL) 594 return (false); 595 596 if (strcmp(arg, "create") == 0 || strcmp(arg, "plumb") == 0) 597 return (true); 598 599 return (false); 600 } 601 602 static bool 603 isnametoolong(const char *ifname) 604 { 605 return (strlen(ifname) >= IFNAMSIZ); 606 } 607 608 int 609 main(int ac, char *av[]) 610 { 611 char *envformat; 612 int flags; 613 #ifdef JAIL 614 int jid; 615 #endif 616 struct ifconfig_args _args = {}; 617 struct ifconfig_args *args = &_args; 618 619 f_inet = f_inet6 = f_ether = f_addr = NULL; 620 621 lifh = ifconfig_open(); 622 if (lifh == NULL) 623 err(EXIT_FAILURE, "ifconfig_open"); 624 625 envformat = getenv("IFCONFIG_FORMAT"); 626 if (envformat != NULL) 627 setformat(envformat); 628 629 /* 630 * Ensure we print interface name when expected to, 631 * even if we terminate early due to error. 632 */ 633 atexit(printifnamemaybe); 634 635 args_parse(args, ac, av); 636 637 #ifdef JAIL 638 if (args->jail_name) { 639 jid = jail_getid(args->jail_name); 640 if (jid == -1) 641 Perror("jail not found"); 642 if (jail_attach(jid) != 0) 643 Perror("cannot attach to jail"); 644 } 645 #endif 646 647 if (!args->all && !args->namesonly) { 648 /* not listing, need an argument */ 649 args->ifname = args_pop(args); 650 651 /* check and maybe load support for this interface */ 652 ifmaybeload(args, args->ifname); 653 654 char *arg = args_peek(args); 655 if (if_nametoindex(args->ifname) == 0) { 656 /* 657 * NOTE: We must special-case the `create' command 658 * right here as we would otherwise fail when trying 659 * to find the interface. 660 */ 661 if (isargcreate(arg)) { 662 if (isnametoolong(args->ifname)) 663 errx(1, "%s: cloning name too long", 664 args->ifname); 665 ifconfig_wrapper(args, 1, NULL); 666 exit(exit_code); 667 } 668 #ifdef JAIL 669 /* 670 * NOTE: We have to special-case the `-vnet' command 671 * right here as we would otherwise fail when trying 672 * to find the interface as it lives in another vnet. 673 */ 674 if (arg != NULL && (strcmp(arg, "-vnet") == 0)) { 675 if (isnametoolong(args->ifname)) 676 errx(1, "%s: interface name too long", 677 args->ifname); 678 ifconfig_wrapper(args, 0, NULL); 679 exit(exit_code); 680 } 681 #endif 682 errx(1, "interface %s does not exist", args->ifname); 683 } else { 684 /* 685 * Do not allow use `create` command as hostname if 686 * address family is not specified. 687 */ 688 if (isargcreate(arg)) { 689 if (args->argc == 1) 690 errx(1, "interface %s already exists", 691 args->ifname); 692 args_pop(args); 693 } 694 } 695 } 696 697 /* Check for address family */ 698 if (args->argc > 0) { 699 args->afp = af_getbyname(args_peek(args)); 700 if (args->afp != NULL) 701 args_pop(args); 702 } 703 704 /* 705 * Check for a requested configuration action on a single interface, 706 * which doesn't require building, sorting, and searching the entire 707 * system address list 708 */ 709 if ((args->argc > 0) && (args->ifname != NULL)) { 710 if (isnametoolong(args->ifname)) 711 warnx("%s: interface name too long, skipping", args->ifname); 712 else { 713 flags = getifflags(args->ifname, -1, false); 714 if (!(((flags & IFF_CANTCONFIG) != 0) || 715 (args->downonly && (flags & IFF_UP) != 0) || 716 (args->uponly && (flags & IFF_UP) == 0))) 717 ifconfig_wrapper(args, 0, args->afp); 718 } 719 goto done; 720 } 721 722 args->allfamilies = args->afp == NULL; 723 724 list_interfaces(args); 725 726 done: 727 freeformat(); 728 ifconfig_close(lifh); 729 exit(exit_code); 730 } 731 732 bool 733 match_ether(const struct sockaddr_dl *sdl) 734 { 735 switch (sdl->sdl_type) { 736 case IFT_ETHER: 737 case IFT_L2VLAN: 738 case IFT_BRIDGE: 739 if (sdl->sdl_alen == ETHER_ADDR_LEN) 740 return (true); 741 default: 742 return (false); 743 } 744 } 745 746 bool 747 match_if_flags(struct ifconfig_args *args, int if_flags) 748 { 749 if ((if_flags & IFF_CANTCONFIG) != 0) 750 return (false); 751 if (args->downonly && (if_flags & IFF_UP) != 0) 752 return (false); 753 if (args->uponly && (if_flags & IFF_UP) == 0) 754 return (false); 755 return (true); 756 } 757 758 #ifdef WITHOUT_NETLINK 759 static bool 760 match_afp(const struct afswtch *afp, int sa_family, const struct sockaddr_dl *sdl) 761 { 762 if (afp == NULL) 763 return (true); 764 /* special case for "ether" address family */ 765 if (!strcmp(afp->af_name, "ether")) { 766 if (sdl == NULL && !match_ether(sdl)) 767 return (false); 768 return (true); 769 } 770 return (afp->af_af == sa_family); 771 } 772 773 static void 774 list_interfaces_ioctl(struct ifconfig_args *args) 775 { 776 struct ifa_queue q = TAILQ_HEAD_INITIALIZER(q); 777 struct ifaddrs *ifap, *sifap, *ifa; 778 struct ifa_order_elt *cur, *tmp; 779 char *namecp = NULL; 780 int ifindex; 781 782 if (getifaddrs(&ifap) != 0) 783 err(EXIT_FAILURE, "getifaddrs"); 784 785 char *cp = NULL; 786 787 if (calcorders(ifap, &q) != 0) 788 err(EXIT_FAILURE, "calcorders"); 789 790 sifap = sortifaddrs(ifap, cmpifaddrs, &q); 791 792 TAILQ_FOREACH_SAFE(cur, &q, link, tmp) 793 free(cur); 794 795 ifindex = 0; 796 for (ifa = sifap; ifa; ifa = ifa->ifa_next) { 797 struct ifreq paifr = {}; 798 const struct sockaddr_dl *sdl; 799 800 strlcpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name)); 801 if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) { 802 memcpy(&paifr.ifr_addr, ifa->ifa_addr, 803 ifa->ifa_addr->sa_len); 804 } 805 806 if (args->ifname != NULL && strcmp(args->ifname, ifa->ifa_name) != 0) 807 continue; 808 if (ifa->ifa_addr->sa_family == AF_LINK) 809 sdl = (const struct sockaddr_dl *) ifa->ifa_addr; 810 else 811 sdl = NULL; 812 if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0 && !args->namesonly) 813 continue; 814 if (isnametoolong(ifa->ifa_name)) { 815 warnx("%s: interface name too long, skipping", 816 ifa->ifa_name); 817 continue; 818 } 819 cp = ifa->ifa_name; 820 821 if (!match_if_flags(args, ifa->ifa_flags)) 822 continue; 823 if (!group_member(ifa->ifa_name, args->matchgroup, args->nogroup)) 824 continue; 825 /* 826 * Are we just listing the interfaces? 827 */ 828 if (args->namesonly) { 829 if (namecp == cp) 830 continue; 831 if (!match_afp(args->afp, ifa->ifa_addr->sa_family, sdl)) 832 continue; 833 namecp = cp; 834 ifindex++; 835 if (ifindex > 1) 836 printf(" "); 837 fputs(cp, stdout); 838 continue; 839 } 840 ifindex++; 841 842 if (args->argc > 0) 843 ifconfig_wrapper(args, 0, args->afp); 844 else 845 status(args, sdl, ifa); 846 } 847 if (args->namesonly) 848 printf("\n"); 849 freeifaddrs(ifap); 850 } 851 #endif 852 853 /* 854 * Returns true if an interface should be listed because any its groups 855 * matches shell pattern "match" and none of groups matches pattern "nomatch". 856 * If any pattern is NULL, corresponding condition is skipped. 857 */ 858 bool 859 group_member(const char *ifname, const char *match, const char *nomatch) 860 { 861 static int sock = -1; 862 863 struct ifgroupreq ifgr; 864 struct ifg_req *ifg; 865 unsigned int len; 866 bool matched, nomatched; 867 868 /* Sanity checks. */ 869 if (match == NULL && nomatch == NULL) 870 return (true); 871 if (ifname == NULL) 872 return (false); 873 874 memset(&ifgr, 0, sizeof(ifgr)); 875 strlcpy(ifgr.ifgr_name, ifname, IFNAMSIZ); 876 877 /* The socket is opened once. Let _exit() close it. */ 878 if (sock == -1) { 879 sock = socket(AF_LOCAL, SOCK_DGRAM, 0); 880 if (sock == -1) 881 errx(1, "%s: socket(AF_LOCAL,SOCK_DGRAM)", __func__); 882 } 883 884 /* Determine amount of memory for the list of groups. */ 885 if (ioctl(sock, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) { 886 if (errno == EINVAL || errno == ENOTTY) 887 return (false); 888 else 889 errx(1, "%s: SIOCGIFGROUP", __func__); 890 } 891 892 /* Obtain the list of groups. */ 893 len = ifgr.ifgr_len; 894 ifgr.ifgr_groups = 895 (struct ifg_req *)calloc(len / sizeof(*ifg), sizeof(*ifg)); 896 897 if (ifgr.ifgr_groups == NULL) 898 errx(1, "%s: no memory", __func__); 899 if (ioctl(sock, SIOCGIFGROUP, (caddr_t)&ifgr) == -1) 900 errx(1, "%s: SIOCGIFGROUP", __func__); 901 902 /* Perform matching. */ 903 matched = false; 904 nomatched = true; 905 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(*ifg); ifg++) { 906 len -= sizeof(struct ifg_req); 907 if (match) 908 matched |= !fnmatch(match, ifg->ifgrq_group, 0); 909 if (nomatch) 910 nomatched &= fnmatch(nomatch, ifg->ifgrq_group, 0); 911 } 912 free(ifgr.ifgr_groups); 913 914 if (match && !nomatch) 915 return (matched); 916 if (!match && nomatch) 917 return (nomatched); 918 return (matched && nomatched); 919 } 920 921 static struct afswtch *afs = NULL; 922 923 void 924 af_register(struct afswtch *p) 925 { 926 p->af_next = afs; 927 afs = p; 928 } 929 930 static struct afswtch * 931 af_getbyname(const char *name) 932 { 933 struct afswtch *afp; 934 935 for (afp = afs; afp != NULL; afp = afp->af_next) 936 if (strcmp(afp->af_name, name) == 0) 937 return afp; 938 return NULL; 939 } 940 941 struct afswtch * 942 af_getbyfamily(int af) 943 { 944 struct afswtch *afp; 945 946 for (afp = afs; afp != NULL; afp = afp->af_next) 947 if (afp->af_af == af) 948 return afp; 949 return NULL; 950 } 951 952 void 953 af_other_status(if_ctx *ctx) 954 { 955 struct afswtch *afp; 956 uint8_t afmask[howmany(AF_MAX, NBBY)]; 957 958 memset(afmask, 0, sizeof(afmask)); 959 for (afp = afs; afp != NULL; afp = afp->af_next) { 960 if (afp->af_other_status == NULL) 961 continue; 962 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 963 continue; 964 afp->af_other_status(ctx); 965 setbit(afmask, afp->af_af); 966 } 967 } 968 969 static void 970 af_all_tunnel_status(if_ctx *ctx) 971 { 972 struct afswtch *afp; 973 uint8_t afmask[howmany(AF_MAX, NBBY)]; 974 975 memset(afmask, 0, sizeof(afmask)); 976 for (afp = afs; afp != NULL; afp = afp->af_next) { 977 if (afp->af_status_tunnel == NULL) 978 continue; 979 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 980 continue; 981 afp->af_status_tunnel(ctx); 982 setbit(afmask, afp->af_af); 983 } 984 } 985 986 static struct cmd *cmds = NULL; 987 988 void 989 cmd_register(struct cmd *p) 990 { 991 p->c_next = cmds; 992 cmds = p; 993 } 994 995 static const struct cmd * 996 cmd_lookup(const char *name, int iscreate) 997 { 998 const struct cmd *p; 999 1000 for (p = cmds; p != NULL; p = p->c_next) 1001 if (strcmp(name, p->c_name) == 0) { 1002 if (iscreate) { 1003 if (p->c_iscloneop) 1004 return p; 1005 } else { 1006 if (!p->c_iscloneop) 1007 return p; 1008 } 1009 } 1010 return NULL; 1011 } 1012 1013 struct callback { 1014 callback_func *cb_func; 1015 void *cb_arg; 1016 struct callback *cb_next; 1017 }; 1018 static struct callback *callbacks = NULL; 1019 1020 void 1021 callback_register(callback_func *func, void *arg) 1022 { 1023 struct callback *cb; 1024 1025 cb = malloc(sizeof(struct callback)); 1026 if (cb == NULL) 1027 errx(1, "unable to allocate memory for callback"); 1028 cb->cb_func = func; 1029 cb->cb_arg = arg; 1030 cb->cb_next = callbacks; 1031 callbacks = cb; 1032 } 1033 1034 /* specially-handled commands */ 1035 static void setifaddr(if_ctx *ctx, const char *addr, int param); 1036 static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr); 1037 1038 static void setifdstaddr(if_ctx *ctx, const char *addr, int param __unused); 1039 static const struct cmd setifdstaddr_cmd = 1040 DEF_CMD("ifdstaddr", 0, setifdstaddr); 1041 1042 int 1043 af_exec_ioctl(if_ctx *ctx, unsigned long action, void *data) 1044 { 1045 struct ifreq *req = (struct ifreq *)data; 1046 1047 strlcpy(req->ifr_name, ctx->ifname, sizeof(req->ifr_name)); 1048 if (ioctl_ctx(ctx, action, req) == 0) 1049 return (0); 1050 return (errno); 1051 } 1052 1053 static void 1054 delifaddr(if_ctx *ctx, const struct afswtch *afp) 1055 { 1056 int error; 1057 1058 if (afp->af_exec == NULL) { 1059 warnx("interface %s cannot change %s addresses!", 1060 ctx->ifname, afp->af_name); 1061 clearaddr = 0; 1062 return; 1063 } 1064 1065 error = afp->af_exec(ctx, afp->af_difaddr, afp->af_ridreq); 1066 if (error != 0) { 1067 if (error == EADDRNOTAVAIL && (doalias >= 0)) { 1068 /* means no previous address for interface */ 1069 } else 1070 Perrorc("ioctl (SIOCDIFADDR)", error); 1071 } 1072 } 1073 1074 static void 1075 addifaddr(if_ctx *ctx, const struct afswtch *afp) 1076 { 1077 if (afp->af_exec == NULL) { 1078 warnx("interface %s cannot change %s addresses!", 1079 ctx->ifname, afp->af_name); 1080 newaddr = 0; 1081 return; 1082 } 1083 1084 if (setaddr || setmask) { 1085 int error = afp->af_exec(ctx, afp->af_aifaddr, afp->af_addreq); 1086 if (error != 0) 1087 Perrorc("ioctl (SIOCAIFADDR)", error); 1088 } 1089 } 1090 1091 int 1092 ifconfig(if_ctx *orig_ctx, int iscreate, const struct afswtch *uafp) 1093 { 1094 const struct afswtch *afp, *nafp; 1095 const struct cmd *p; 1096 struct callback *cb; 1097 int s; 1098 int argc = orig_ctx->args->argc; 1099 char *const *argv = orig_ctx->args->argv; 1100 struct ifconfig_context _ctx = { 1101 .args = orig_ctx->args, 1102 .io_ss = orig_ctx->io_ss, 1103 .ifname = orig_ctx->ifname, 1104 }; 1105 struct ifconfig_context *ctx = &_ctx; 1106 1107 strlcpy(ifr.ifr_name, ctx->ifname, sizeof ifr.ifr_name); 1108 afp = NULL; 1109 if (uafp != NULL) 1110 afp = uafp; 1111 /* 1112 * This is the historical "accident" allowing users to configure IPv4 1113 * addresses without the "inet" keyword which while a nice feature has 1114 * proven to complicate other things. We cannot remove this but only 1115 * make sure we will never have a similar implicit default for IPv6 or 1116 * any other address familiy. We need a fallback though for 1117 * ifconfig IF up/down etc. to work without INET support as people 1118 * never used ifconfig IF link up/down, etc. either. 1119 */ 1120 #ifndef RESCUE 1121 #ifdef INET 1122 if (afp == NULL && feature_present("inet")) 1123 afp = af_getbyname("inet"); 1124 #endif 1125 #endif 1126 if (afp == NULL) 1127 afp = af_getbyname("link"); 1128 if (afp == NULL) { 1129 warnx("Please specify an address_family."); 1130 usage(); 1131 } 1132 1133 top: 1134 ifr.ifr_addr.sa_family = 1135 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ? 1136 AF_LOCAL : afp->af_af; 1137 1138 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 && 1139 (uafp != NULL || errno != EAFNOSUPPORT || 1140 (s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0)) 1141 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 1142 1143 ctx->io_s = s; 1144 ctx->afp = afp; 1145 1146 while (argc > 0) { 1147 p = cmd_lookup(*argv, iscreate); 1148 if (iscreate && p == NULL) { 1149 /* 1150 * Push the clone create callback so the new 1151 * device is created and can be used for any 1152 * remaining arguments. 1153 */ 1154 cb = callbacks; 1155 if (cb == NULL) 1156 errx(1, "internal error, no callback"); 1157 callbacks = cb->cb_next; 1158 cb->cb_func(ctx, cb->cb_arg); 1159 iscreate = 0; 1160 /* 1161 * Handle any address family spec that 1162 * immediately follows and potentially 1163 * recreate the socket. 1164 */ 1165 nafp = af_getbyname(*argv); 1166 if (nafp != NULL) { 1167 argc--, argv++; 1168 if (nafp != afp) { 1169 close(s); 1170 afp = nafp; 1171 goto top; 1172 } 1173 } 1174 /* 1175 * Look for a normal parameter. 1176 */ 1177 continue; 1178 } 1179 if (p == NULL) { 1180 /* 1181 * Not a recognized command, choose between setting 1182 * the interface address and the dst address. 1183 */ 1184 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd); 1185 } 1186 if (p->c_parameter == NEXTARG && p->c_u.c_func) { 1187 if (argv[1] == NULL) 1188 errx(1, "'%s' requires argument", 1189 p->c_name); 1190 p->c_u.c_func(ctx, argv[1], 0); 1191 argc--, argv++; 1192 } else if (p->c_parameter == OPTARG && p->c_u.c_func) { 1193 p->c_u.c_func(ctx, argv[1], 0); 1194 if (argv[1] != NULL) 1195 argc--, argv++; 1196 } else if (p->c_parameter == NEXTARG2 && p->c_u.c_func2) { 1197 if (argc < 3) 1198 errx(1, "'%s' requires 2 arguments", 1199 p->c_name); 1200 p->c_u.c_func2(ctx, argv[1], argv[2]); 1201 argc -= 2, argv += 2; 1202 } else if (p->c_parameter == SPARAM && p->c_u.c_func3) { 1203 p->c_u.c_func3(ctx, *argv, p->c_sparameter); 1204 } else if (p->c_u.c_func) 1205 p->c_u.c_func(ctx, *argv, p->c_parameter); 1206 argc--, argv++; 1207 } 1208 1209 /* 1210 * Do any post argument processing required by the address family. 1211 */ 1212 if (afp->af_postproc != NULL) 1213 afp->af_postproc(ctx, newaddr, getifflags(ctx->ifname, s, true)); 1214 /* 1215 * Do deferred callbacks registered while processing 1216 * command-line arguments. 1217 */ 1218 for (cb = callbacks; cb != NULL; cb = cb->cb_next) 1219 cb->cb_func(ctx, cb->cb_arg); 1220 /* 1221 * Do deferred operations. 1222 */ 1223 if (clearaddr) 1224 delifaddr(ctx, afp); 1225 if (newaddr) 1226 addifaddr(ctx, afp); 1227 1228 close(s); 1229 return(0); 1230 } 1231 1232 static void 1233 setifaddr(if_ctx *ctx, const char *addr, int param) 1234 { 1235 const struct afswtch *afp = ctx->afp; 1236 1237 if (afp->af_getaddr == NULL) 1238 return; 1239 /* 1240 * Delay the ioctl to set the interface addr until flags are all set. 1241 * The address interpretation may depend on the flags, 1242 * and the flags may change when the address is set. 1243 */ 1244 setaddr++; 1245 if (doalias == 0 && afp->af_af != AF_LINK) 1246 clearaddr = 1; 1247 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); 1248 } 1249 1250 static void 1251 settunnel(if_ctx *ctx, const char *src, const char *dst) 1252 { 1253 const struct afswtch *afp = ctx->afp; 1254 struct addrinfo *srcres, *dstres; 1255 int ecode; 1256 1257 if (afp->af_settunnel == NULL) { 1258 warn("address family %s does not support tunnel setup", 1259 afp->af_name); 1260 return; 1261 } 1262 1263 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) 1264 errx(1, "error in parsing address string: %s", 1265 gai_strerror(ecode)); 1266 1267 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) 1268 errx(1, "error in parsing address string: %s", 1269 gai_strerror(ecode)); 1270 1271 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 1272 errx(1, 1273 "source and destination address families do not match"); 1274 1275 afp->af_settunnel(ctx, srcres, dstres); 1276 1277 freeaddrinfo(srcres); 1278 freeaddrinfo(dstres); 1279 } 1280 1281 static void 1282 deletetunnel(if_ctx *ctx, const char *vname, int param) 1283 { 1284 1285 if (ioctl(ctx->io_s, SIOCDIFPHYADDR, &ifr) < 0) 1286 err(1, "SIOCDIFPHYADDR"); 1287 } 1288 1289 #ifdef JAIL 1290 static void 1291 setifvnet(if_ctx *ctx, const char *jname, int dummy __unused) 1292 { 1293 struct ifreq my_ifr; 1294 1295 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 1296 my_ifr.ifr_jid = jail_getid(jname); 1297 if (my_ifr.ifr_jid < 0) 1298 errx(1, "%s", jail_errmsg); 1299 if (ioctl(ctx->io_s, SIOCSIFVNET, &my_ifr) < 0) 1300 err(1, "SIOCSIFVNET"); 1301 } 1302 1303 static void 1304 setifrvnet(if_ctx *ctx, const char *jname, int dummy __unused) 1305 { 1306 struct ifreq my_ifr; 1307 1308 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 1309 my_ifr.ifr_jid = jail_getid(jname); 1310 if (my_ifr.ifr_jid < 0) 1311 errx(1, "%s", jail_errmsg); 1312 if (ioctl(ctx->io_s, SIOCSIFRVNET, &my_ifr) < 0) 1313 err(1, "SIOCSIFRVNET(%d, %s)", my_ifr.ifr_jid, my_ifr.ifr_name); 1314 } 1315 #endif 1316 1317 static void 1318 setifnetmask(if_ctx *ctx, const char *addr, int dummy __unused) 1319 { 1320 const struct afswtch *afp = ctx->afp; 1321 1322 if (afp->af_getaddr != NULL) { 1323 setmask++; 1324 afp->af_getaddr(addr, MASK); 1325 } 1326 } 1327 1328 static void 1329 setifbroadaddr(if_ctx *ctx, const char *addr, int dummy __unused) 1330 { 1331 const struct afswtch *afp = ctx->afp; 1332 1333 if (afp->af_getaddr != NULL) 1334 afp->af_getaddr(addr, BRDADDR); 1335 } 1336 1337 static void 1338 notealias(if_ctx *ctx, const char *addr, int param) 1339 { 1340 const struct afswtch *afp = ctx->afp; 1341 1342 if (setaddr && doalias == 0 && param < 0) { 1343 if (afp->af_copyaddr != NULL) 1344 afp->af_copyaddr(ctx, RIDADDR, ADDR); 1345 } 1346 doalias = param; 1347 if (param < 0) { 1348 clearaddr = 1; 1349 newaddr = 0; 1350 } else 1351 clearaddr = 0; 1352 } 1353 1354 static void 1355 setifdstaddr(if_ctx *ctx, const char *addr, int param __unused) 1356 { 1357 const struct afswtch *afp = ctx->afp; 1358 1359 if (afp->af_getaddr != NULL) 1360 afp->af_getaddr(addr, DSTADDR); 1361 } 1362 1363 static int 1364 getifflags(const char *ifname, int us, bool err_ok) 1365 { 1366 struct ifreq my_ifr; 1367 int s; 1368 1369 memset(&my_ifr, 0, sizeof(my_ifr)); 1370 (void) strlcpy(my_ifr.ifr_name, ifname, sizeof(my_ifr.ifr_name)); 1371 if (us < 0) { 1372 if ((s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0) 1373 err(1, "socket(family AF_LOCAL,SOCK_DGRAM"); 1374 } else 1375 s = us; 1376 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) { 1377 if (!err_ok) { 1378 Perror("ioctl (SIOCGIFFLAGS)"); 1379 exit(1); 1380 } 1381 } 1382 if (us < 0) 1383 close(s); 1384 return ((my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16)); 1385 } 1386 1387 /* 1388 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion 1389 * of the ifreq structure, which may confuse other parts of ifconfig. 1390 * Make a private copy so we can avoid that. 1391 */ 1392 static void 1393 setifflags(if_ctx *ctx, const char *vname, int value) 1394 { 1395 struct ifreq my_ifr; 1396 int flags; 1397 1398 flags = getifflags(ctx->ifname, ctx->io_s, false); 1399 if (value < 0) { 1400 value = -value; 1401 flags &= ~value; 1402 } else 1403 flags |= value; 1404 memset(&my_ifr, 0, sizeof(my_ifr)); 1405 strlcpy(my_ifr.ifr_name, ctx->ifname, sizeof(my_ifr.ifr_name)); 1406 my_ifr.ifr_flags = flags & 0xffff; 1407 my_ifr.ifr_flagshigh = flags >> 16; 1408 if (ioctl(ctx->io_s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0) 1409 Perror(vname); 1410 } 1411 1412 void 1413 setifcap(if_ctx *ctx, const char *vname, int value) 1414 { 1415 int flags; 1416 1417 if (ioctl(ctx->io_s, SIOCGIFCAP, (caddr_t)&ifr) < 0) { 1418 Perror("ioctl (SIOCGIFCAP)"); 1419 exit(1); 1420 } 1421 flags = ifr.ifr_curcap; 1422 if (value < 0) { 1423 value = -value; 1424 flags &= ~value; 1425 } else 1426 flags |= value; 1427 flags &= ifr.ifr_reqcap; 1428 /* Check for no change in capabilities. */ 1429 if (ifr.ifr_curcap == flags) 1430 return; 1431 ifr.ifr_reqcap = flags; 1432 if (ioctl(ctx->io_s, SIOCSIFCAP, (caddr_t)&ifr) < 0) 1433 Perror(vname); 1434 } 1435 1436 void 1437 setifcapnv(if_ctx *ctx, const char *vname, const char *arg) 1438 { 1439 nvlist_t *nvcap; 1440 void *buf; 1441 char *marg, *mopt; 1442 size_t nvbuflen; 1443 bool neg; 1444 1445 if (ioctl(ctx->io_s, SIOCGIFCAP, (caddr_t)&ifr) < 0) 1446 Perror("ioctl (SIOCGIFCAP)"); 1447 if ((ifr.ifr_curcap & IFCAP_NV) == 0) { 1448 warnx("IFCAP_NV not supported"); 1449 return; /* Not exit() */ 1450 } 1451 1452 marg = strdup(arg); 1453 if (marg == NULL) 1454 Perror("strdup"); 1455 nvcap = nvlist_create(0); 1456 if (nvcap == NULL) 1457 Perror("nvlist_create"); 1458 while ((mopt = strsep(&marg, ",")) != NULL) { 1459 neg = *mopt == '-'; 1460 if (neg) 1461 mopt++; 1462 if (strcmp(mopt, "rxtls") == 0) { 1463 nvlist_add_bool(nvcap, "rxtls4", !neg); 1464 nvlist_add_bool(nvcap, "rxtls6", !neg); 1465 } else { 1466 nvlist_add_bool(nvcap, mopt, !neg); 1467 } 1468 } 1469 buf = nvlist_pack(nvcap, &nvbuflen); 1470 if (buf == NULL) { 1471 errx(1, "nvlist_pack error"); 1472 exit(1); 1473 } 1474 ifr.ifr_cap_nv.buf_length = ifr.ifr_cap_nv.length = nvbuflen; 1475 ifr.ifr_cap_nv.buffer = buf; 1476 if (ioctl(ctx->io_s, SIOCSIFCAPNV, (caddr_t)&ifr) < 0) 1477 Perror(vname); 1478 free(buf); 1479 nvlist_destroy(nvcap); 1480 free(marg); 1481 } 1482 1483 static void 1484 setifmetric(if_ctx *ctx, const char *val, int dummy __unused) 1485 { 1486 strlcpy(ifr.ifr_name, ctx->ifname, sizeof (ifr.ifr_name)); 1487 ifr.ifr_metric = atoi(val); 1488 if (ioctl(ctx->io_s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0) 1489 err(1, "ioctl SIOCSIFMETRIC (set metric)"); 1490 } 1491 1492 static void 1493 setifmtu(if_ctx *ctx, const char *val, int dummy __unused) 1494 { 1495 strlcpy(ifr.ifr_name, ctx->ifname, sizeof (ifr.ifr_name)); 1496 ifr.ifr_mtu = atoi(val); 1497 if (ioctl(ctx->io_s, SIOCSIFMTU, (caddr_t)&ifr) < 0) 1498 err(1, "ioctl SIOCSIFMTU (set mtu)"); 1499 } 1500 1501 static void 1502 setifpcp(if_ctx *ctx, const char *val, int arg __unused) 1503 { 1504 u_long ul; 1505 char *endp; 1506 1507 ul = strtoul(val, &endp, 0); 1508 if (*endp != '\0') 1509 errx(1, "invalid value for pcp"); 1510 if (ul > 7) 1511 errx(1, "value for pcp out of range"); 1512 ifr.ifr_lan_pcp = ul; 1513 if (ioctl(ctx->io_s, SIOCSLANPCP, (caddr_t)&ifr) == -1) 1514 err(1, "SIOCSLANPCP"); 1515 } 1516 1517 static void 1518 disableifpcp(if_ctx *ctx, const char *val, int arg __unused) 1519 { 1520 1521 ifr.ifr_lan_pcp = IFNET_PCP_NONE; 1522 if (ioctl(ctx->io_s, SIOCSLANPCP, (caddr_t)&ifr) == -1) 1523 err(1, "SIOCSLANPCP"); 1524 } 1525 1526 static void 1527 setifname(if_ctx *ctx, const char *val, int dummy __unused) 1528 { 1529 char *newname; 1530 1531 strlcpy(ifr.ifr_name, ctx->ifname, sizeof(ifr.ifr_name)); 1532 1533 newname = strdup(val); 1534 if (newname == NULL) 1535 err(1, "no memory to set ifname"); 1536 ifr.ifr_data = newname; 1537 if (ioctl(ctx->io_s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 1538 free(newname); 1539 err(1, "ioctl SIOCSIFNAME (set name)"); 1540 } 1541 ifname_update(ctx, newname); 1542 free(newname); 1543 } 1544 1545 static void 1546 setifdescr(if_ctx *ctx, const char *val, int dummy __unused) 1547 { 1548 char *newdescr; 1549 1550 strlcpy(ifr.ifr_name, ctx->ifname, sizeof(ifr.ifr_name)); 1551 1552 ifr.ifr_buffer.length = strlen(val) + 1; 1553 if (ifr.ifr_buffer.length == 1) { 1554 ifr.ifr_buffer.buffer = newdescr = NULL; 1555 ifr.ifr_buffer.length = 0; 1556 } else { 1557 newdescr = strdup(val); 1558 ifr.ifr_buffer.buffer = newdescr; 1559 if (newdescr == NULL) { 1560 warn("no memory to set ifdescr"); 1561 return; 1562 } 1563 } 1564 1565 if (ioctl(ctx->io_s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) 1566 err(1, "ioctl SIOCSIFDESCR (set descr)"); 1567 1568 free(newdescr); 1569 } 1570 1571 static void 1572 unsetifdescr(if_ctx *ctx, const char *val, int value) 1573 { 1574 setifdescr(ctx, "", 0); 1575 } 1576 1577 #define IFFBITS \ 1578 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\7RUNNING" \ 1579 "\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ 1580 "\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP\25STICKYARP" 1581 1582 #define IFCAPBITS \ 1583 "\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \ 1584 "\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \ 1585 "\17TOE4\20TOE6\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE\25NETMAP" \ 1586 "\26RXCSUM_IPV6\27TXCSUM_IPV6\31TXRTLMT\32HWRXTSTMP\33NOMAP\34TXTLS4\35TXTLS6" \ 1587 "\36VXLAN_HWCSUM\37VXLAN_HWTSO\40TXTLS_RTLMT" 1588 1589 static void 1590 print_ifcap_nv(struct ifconfig_args *args, int s) 1591 { 1592 nvlist_t *nvcap; 1593 const char *nvname; 1594 void *buf, *cookie; 1595 bool first, val; 1596 int type; 1597 1598 buf = malloc(IFR_CAP_NV_MAXBUFSIZE); 1599 if (buf == NULL) 1600 Perror("malloc"); 1601 ifr.ifr_cap_nv.buffer = buf; 1602 ifr.ifr_cap_nv.buf_length = IFR_CAP_NV_MAXBUFSIZE; 1603 if (ioctl(s, SIOCGIFCAPNV, (caddr_t)&ifr) != 0) 1604 Perror("ioctl (SIOCGIFCAPNV)"); 1605 nvcap = nvlist_unpack(ifr.ifr_cap_nv.buffer, 1606 ifr.ifr_cap_nv.length, 0); 1607 if (nvcap == NULL) 1608 Perror("nvlist_unpack"); 1609 printf("\toptions"); 1610 cookie = NULL; 1611 for (first = true;; first = false) { 1612 nvname = nvlist_next(nvcap, &type, &cookie); 1613 if (nvname == NULL) { 1614 printf("\n"); 1615 break; 1616 } 1617 if (type == NV_TYPE_BOOL) { 1618 val = nvlist_get_bool(nvcap, nvname); 1619 if (val) { 1620 printf("%c%s", 1621 first ? ' ' : ',', nvname); 1622 } 1623 } 1624 } 1625 if (args->supmedia) { 1626 printf("\tcapabilities"); 1627 cookie = NULL; 1628 for (first = true;; first = false) { 1629 nvname = nvlist_next(nvcap, &type, 1630 &cookie); 1631 if (nvname == NULL) { 1632 printf("\n"); 1633 break; 1634 } 1635 if (type == NV_TYPE_BOOL) 1636 printf("%c%s", first ? ' ' : 1637 ',', nvname); 1638 } 1639 } 1640 nvlist_destroy(nvcap); 1641 free(buf); 1642 1643 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) != 0) 1644 Perror("ioctl (SIOCGIFCAP)"); 1645 } 1646 1647 void 1648 print_ifcap(struct ifconfig_args *args, int s) 1649 { 1650 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) != 0) 1651 return; 1652 1653 if ((ifr.ifr_curcap & IFCAP_NV) != 0) 1654 print_ifcap_nv(args, s); 1655 else { 1656 printb("\toptions", ifr.ifr_curcap, IFCAPBITS); 1657 putchar('\n'); 1658 if (args->supmedia && ifr.ifr_reqcap != 0) { 1659 printb("\tcapabilities", ifr.ifr_reqcap, 1660 IFCAPBITS); 1661 putchar('\n'); 1662 } 1663 } 1664 } 1665 1666 void 1667 print_ifstatus(if_ctx *ctx) 1668 { 1669 struct ifstat ifs; 1670 1671 strlcpy(ifs.ifs_name, ctx->ifname, sizeof ifs.ifs_name); 1672 if (ioctl_ctx(ctx, SIOCGIFSTATUS, &ifs) == 0) 1673 printf("%s", ifs.ascii); 1674 } 1675 1676 void 1677 print_metric(int s) 1678 { 1679 if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1) 1680 printf(" metric %d", ifr.ifr_metric); 1681 } 1682 1683 #ifdef WITHOUT_NETLINK 1684 static void 1685 print_mtu(int s) 1686 { 1687 if (ioctl(s, SIOCGIFMTU, &ifr) != -1) 1688 printf(" mtu %d", ifr.ifr_mtu); 1689 } 1690 1691 static void 1692 print_description(int s) 1693 { 1694 for (;;) { 1695 if ((descr = reallocf(descr, descrlen)) != NULL) { 1696 ifr.ifr_buffer.buffer = descr; 1697 ifr.ifr_buffer.length = descrlen; 1698 if (ioctl(s, SIOCGIFDESCR, &ifr) == 0) { 1699 if (ifr.ifr_buffer.buffer == descr) { 1700 if (strlen(descr) > 0) 1701 printf("\tdescription: %s\n", 1702 descr); 1703 } else if (ifr.ifr_buffer.length > descrlen) { 1704 descrlen = ifr.ifr_buffer.length; 1705 continue; 1706 } 1707 } 1708 } else 1709 warn("unable to allocate memory for interface" 1710 "description"); 1711 break; 1712 } 1713 } 1714 1715 /* 1716 * Print the status of the interface. If an address family was 1717 * specified, show only it; otherwise, show them all. 1718 */ 1719 static void 1720 status(struct ifconfig_args *args, const struct sockaddr_dl *sdl, 1721 struct ifaddrs *ifa) 1722 { 1723 struct ifaddrs *ift; 1724 int s; 1725 bool allfamilies = args->afp == NULL; 1726 char *ifname = ifa->ifa_name; 1727 1728 if (args->afp == NULL) 1729 ifr.ifr_addr.sa_family = AF_LOCAL; 1730 else 1731 ifr.ifr_addr.sa_family = 1732 args->afp->af_af == AF_LINK ? AF_LOCAL : args->afp->af_af; 1733 strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); 1734 1735 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0); 1736 if (s < 0) 1737 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 1738 1739 struct ifconfig_context _ctx = { 1740 .io_s = s, 1741 .ifname = ifname, 1742 }; 1743 struct ifconfig_context *ctx = &_ctx; 1744 1745 printf("%s: ", ifname); 1746 printb("flags", ifa->ifa_flags, IFFBITS); 1747 print_metric(s); 1748 print_mtu(s); 1749 putchar('\n'); 1750 1751 print_description(s); 1752 1753 print_ifcap(args, s); 1754 1755 tunnel_status(ctx); 1756 1757 for (ift = ifa; ift != NULL; ift = ift->ifa_next) { 1758 if (ift->ifa_addr == NULL) 1759 continue; 1760 if (strcmp(ifa->ifa_name, ift->ifa_name) != 0) 1761 continue; 1762 if (allfamilies) { 1763 const struct afswtch *p; 1764 p = af_getbyfamily(ift->ifa_addr->sa_family); 1765 if (p != NULL && p->af_status != NULL) 1766 p->af_status(ctx, ift); 1767 } else if (args->afp->af_af == ift->ifa_addr->sa_family) 1768 args->afp->af_status(ctx, ift); 1769 } 1770 #if 0 1771 if (allfamilies || afp->af_af == AF_LINK) { 1772 const struct afswtch *lafp; 1773 1774 /* 1775 * Hack; the link level address is received separately 1776 * from the routing information so any address is not 1777 * handled above. Cobble together an entry and invoke 1778 * the status method specially. 1779 */ 1780 lafp = af_getbyname("lladdr"); 1781 if (lafp != NULL) { 1782 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; 1783 lafp->af_status(s, &info); 1784 } 1785 } 1786 #endif 1787 if (allfamilies) 1788 af_other_status(ctx); 1789 else if (args->afp->af_other_status != NULL) 1790 args->afp->af_other_status(ctx); 1791 1792 print_ifstatus(ctx); 1793 if (args->verbose > 0) 1794 sfp_status(ctx); 1795 1796 close(s); 1797 return; 1798 } 1799 #endif 1800 1801 void 1802 tunnel_status(if_ctx *ctx) 1803 { 1804 af_all_tunnel_status(ctx); 1805 } 1806 1807 static void 1808 Perrorc(const char *cmd, int error) 1809 { 1810 switch (errno) { 1811 1812 case ENXIO: 1813 errx(1, "%s: no such interface", cmd); 1814 break; 1815 1816 case EPERM: 1817 errx(1, "%s: permission denied", cmd); 1818 break; 1819 1820 default: 1821 errc(1, error, "%s", cmd); 1822 } 1823 } 1824 1825 void 1826 Perror(const char *cmd) 1827 { 1828 Perrorc(cmd, errno); 1829 } 1830 1831 /* 1832 * Print a value a la the %b format of the kernel's printf 1833 */ 1834 void 1835 printb(const char *s, unsigned v, const char *bits) 1836 { 1837 int i, any = 0; 1838 char c; 1839 1840 if (bits && *bits == 8) 1841 printf("%s=%o", s, v); 1842 else 1843 printf("%s=%x", s, v); 1844 if (bits) { 1845 bits++; 1846 putchar('<'); 1847 while ((i = *bits++) != '\0') { 1848 if (v & (1u << (i-1))) { 1849 if (any) 1850 putchar(','); 1851 any = 1; 1852 for (; (c = *bits) > 32; bits++) 1853 putchar(c); 1854 } else 1855 for (; *bits > 32; bits++) 1856 ; 1857 } 1858 putchar('>'); 1859 } 1860 } 1861 1862 void 1863 print_vhid(const struct ifaddrs *ifa, const char *s) 1864 { 1865 struct if_data *ifd; 1866 1867 if (ifa->ifa_data == NULL) 1868 return; 1869 1870 ifd = ifa->ifa_data; 1871 if (ifd->ifi_vhid == 0) 1872 return; 1873 1874 printf(" vhid %d", ifd->ifi_vhid); 1875 } 1876 1877 void 1878 ifmaybeload(struct ifconfig_args *args, const char *name) 1879 { 1880 #define MOD_PREFIX_LEN 3 /* "if_" */ 1881 struct module_stat mstat; 1882 int fileid, modid; 1883 char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp; 1884 const char *cp; 1885 struct module_map_entry *mme; 1886 bool found; 1887 1888 /* loading suppressed by the user */ 1889 if (args->noload) 1890 return; 1891 1892 /* trim the interface number off the end */ 1893 strlcpy(ifname, name, sizeof(ifname)); 1894 dp = ifname + strlen(ifname) - 1; 1895 for (; dp > ifname; dp--) { 1896 if (isdigit(*dp)) 1897 *dp = '\0'; 1898 else 1899 break; 1900 } 1901 1902 /* Either derive it from the map or guess otherwise */ 1903 *ifkind = '\0'; 1904 found = false; 1905 for (unsigned i = 0; i < nitems(module_map); ++i) { 1906 mme = &module_map[i]; 1907 if (strcmp(mme->ifname, ifname) == 0) { 1908 strlcpy(ifkind, mme->kldname, sizeof(ifkind)); 1909 found = true; 1910 break; 1911 } 1912 } 1913 1914 /* We didn't have an alias for it... we'll guess. */ 1915 if (!found) { 1916 /* turn interface and unit into module name */ 1917 strlcpy(ifkind, "if_", sizeof(ifkind)); 1918 strlcat(ifkind, ifname, sizeof(ifkind)); 1919 } 1920 1921 /* scan files in kernel */ 1922 mstat.version = sizeof(struct module_stat); 1923 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { 1924 /* scan modules in file */ 1925 for (modid = kldfirstmod(fileid); modid > 0; 1926 modid = modfnext(modid)) { 1927 if (modstat(modid, &mstat) < 0) 1928 continue; 1929 /* strip bus name if present */ 1930 if ((cp = strchr(mstat.name, '/')) != NULL) { 1931 cp++; 1932 } else { 1933 cp = mstat.name; 1934 } 1935 /* 1936 * Is it already loaded? Don't compare with ifname if 1937 * we were specifically told which kld to use. Doing 1938 * so could lead to conflicts not trivially solved. 1939 */ 1940 if ((!found && strcmp(ifname, cp) == 0) || 1941 strcmp(ifkind, cp) == 0) 1942 return; 1943 } 1944 } 1945 1946 /* 1947 * Try to load the module. But ignore failures, because ifconfig can't 1948 * infer the names of all drivers (eg mlx4en(4)). 1949 */ 1950 (void) kldload(ifkind); 1951 } 1952 1953 static struct cmd basic_cmds[] = { 1954 DEF_CMD("up", IFF_UP, setifflags), 1955 DEF_CMD("down", -IFF_UP, setifflags), 1956 DEF_CMD("arp", -IFF_NOARP, setifflags), 1957 DEF_CMD("-arp", IFF_NOARP, setifflags), 1958 DEF_CMD("debug", IFF_DEBUG, setifflags), 1959 DEF_CMD("-debug", -IFF_DEBUG, setifflags), 1960 DEF_CMD_ARG("description", setifdescr), 1961 DEF_CMD_ARG("descr", setifdescr), 1962 DEF_CMD("-description", 0, unsetifdescr), 1963 DEF_CMD("-descr", 0, unsetifdescr), 1964 DEF_CMD("promisc", IFF_PPROMISC, setifflags), 1965 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags), 1966 DEF_CMD("add", IFF_UP, notealias), 1967 DEF_CMD("alias", IFF_UP, notealias), 1968 DEF_CMD("-alias", -IFF_UP, notealias), 1969 DEF_CMD("delete", -IFF_UP, notealias), 1970 DEF_CMD("remove", -IFF_UP, notealias), 1971 #ifdef notdef 1972 #define EN_SWABIPS 0x1000 1973 DEF_CMD("swabips", EN_SWABIPS, setifflags), 1974 DEF_CMD("-swabips", -EN_SWABIPS, setifflags), 1975 #endif 1976 DEF_CMD_ARG("netmask", setifnetmask), 1977 DEF_CMD_ARG("metric", setifmetric), 1978 DEF_CMD_ARG("broadcast", setifbroadaddr), 1979 DEF_CMD_ARG2("tunnel", settunnel), 1980 DEF_CMD("-tunnel", 0, deletetunnel), 1981 DEF_CMD("deletetunnel", 0, deletetunnel), 1982 #ifdef JAIL 1983 DEF_CMD_ARG("vnet", setifvnet), 1984 DEF_CMD_ARG("-vnet", setifrvnet), 1985 #endif 1986 DEF_CMD("link0", IFF_LINK0, setifflags), 1987 DEF_CMD("-link0", -IFF_LINK0, setifflags), 1988 DEF_CMD("link1", IFF_LINK1, setifflags), 1989 DEF_CMD("-link1", -IFF_LINK1, setifflags), 1990 DEF_CMD("link2", IFF_LINK2, setifflags), 1991 DEF_CMD("-link2", -IFF_LINK2, setifflags), 1992 DEF_CMD("monitor", IFF_MONITOR, setifflags), 1993 DEF_CMD("-monitor", -IFF_MONITOR, setifflags), 1994 DEF_CMD("mextpg", IFCAP_MEXTPG, setifcap), 1995 DEF_CMD("-mextpg", -IFCAP_MEXTPG, setifcap), 1996 DEF_CMD("staticarp", IFF_STATICARP, setifflags), 1997 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), 1998 DEF_CMD("stickyarp", IFF_STICKYARP, setifflags), 1999 DEF_CMD("-stickyarp", -IFF_STICKYARP, setifflags), 2000 DEF_CMD("rxcsum6", IFCAP_RXCSUM_IPV6, setifcap), 2001 DEF_CMD("-rxcsum6", -IFCAP_RXCSUM_IPV6, setifcap), 2002 DEF_CMD("txcsum6", IFCAP_TXCSUM_IPV6, setifcap), 2003 DEF_CMD("-txcsum6", -IFCAP_TXCSUM_IPV6, setifcap), 2004 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), 2005 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), 2006 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), 2007 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), 2008 DEF_CMD("netcons", IFCAP_NETCONS, setifcap), 2009 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), 2010 DEF_CMD_ARG("pcp", setifpcp), 2011 DEF_CMD("-pcp", 0, disableifpcp), 2012 DEF_CMD("polling", IFCAP_POLLING, setifcap), 2013 DEF_CMD("-polling", -IFCAP_POLLING, setifcap), 2014 DEF_CMD("tso6", IFCAP_TSO6, setifcap), 2015 DEF_CMD("-tso6", -IFCAP_TSO6, setifcap), 2016 DEF_CMD("tso4", IFCAP_TSO4, setifcap), 2017 DEF_CMD("-tso4", -IFCAP_TSO4, setifcap), 2018 DEF_CMD("tso", IFCAP_TSO, setifcap), 2019 DEF_CMD("-tso", -IFCAP_TSO, setifcap), 2020 DEF_CMD("toe", IFCAP_TOE, setifcap), 2021 DEF_CMD("-toe", -IFCAP_TOE, setifcap), 2022 DEF_CMD("lro", IFCAP_LRO, setifcap), 2023 DEF_CMD("-lro", -IFCAP_LRO, setifcap), 2024 DEF_CMD("txtls", IFCAP_TXTLS, setifcap), 2025 DEF_CMD("-txtls", -IFCAP_TXTLS, setifcap), 2026 DEF_CMD_SARG("rxtls", IFCAP2_RXTLS4_NAME "," IFCAP2_RXTLS6_NAME, 2027 setifcapnv), 2028 DEF_CMD_SARG("-rxtls", "-"IFCAP2_RXTLS4_NAME ",-" IFCAP2_RXTLS6_NAME, 2029 setifcapnv), 2030 DEF_CMD("wol", IFCAP_WOL, setifcap), 2031 DEF_CMD("-wol", -IFCAP_WOL, setifcap), 2032 DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap), 2033 DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap), 2034 DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap), 2035 DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap), 2036 DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap), 2037 DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap), 2038 DEF_CMD("txrtlmt", IFCAP_TXRTLMT, setifcap), 2039 DEF_CMD("-txrtlmt", -IFCAP_TXRTLMT, setifcap), 2040 DEF_CMD("txtlsrtlmt", IFCAP_TXTLS_RTLMT, setifcap), 2041 DEF_CMD("-txtlsrtlmt", -IFCAP_TXTLS_RTLMT, setifcap), 2042 DEF_CMD("hwrxtstmp", IFCAP_HWRXTSTMP, setifcap), 2043 DEF_CMD("-hwrxtstmp", -IFCAP_HWRXTSTMP, setifcap), 2044 DEF_CMD("normal", -IFF_LINK0, setifflags), 2045 DEF_CMD("compress", IFF_LINK0, setifflags), 2046 DEF_CMD("noicmp", IFF_LINK1, setifflags), 2047 DEF_CMD_ARG("mtu", setifmtu), 2048 DEF_CMD_ARG("name", setifname), 2049 }; 2050 2051 static __constructor void 2052 ifconfig_ctor(void) 2053 { 2054 size_t i; 2055 2056 for (i = 0; i < nitems(basic_cmds); i++) 2057 cmd_register(&basic_cmds[i]); 2058 } 2059