1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1983, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)ifconfig.c 8.2 (Berkeley) 2/16/94"; 39 #endif 40 static const char rcsid[] = 41 "$FreeBSD$"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/ioctl.h> 46 #include <sys/socket.h> 47 #include <sys/time.h> 48 #include <sys/module.h> 49 #include <sys/linker.h> 50 51 #include <net/ethernet.h> 52 #include <net/if.h> 53 #include <net/if_var.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 <ifaddrs.h> 65 #include <ctype.h> 66 #include <err.h> 67 #include <errno.h> 68 #include <fcntl.h> 69 #ifdef JAIL 70 #include <jail.h> 71 #endif 72 #include <stdio.h> 73 #include <stdlib.h> 74 #include <string.h> 75 #include <unistd.h> 76 77 #include "ifconfig.h" 78 79 /* 80 * Since "struct ifreq" is composed of various union members, callers 81 * should pay special attention to interprete the value. 82 * (.e.g. little/big endian difference in the structure.) 83 */ 84 struct ifreq ifr; 85 86 char name[IFNAMSIZ]; 87 char *descr = NULL; 88 size_t descrlen = 64; 89 int setaddr; 90 int setmask; 91 int doalias; 92 int clearaddr; 93 int newaddr = 1; 94 int verbose; 95 int noload; 96 97 int supmedia = 0; 98 int printkeys = 0; /* Print keying material for interfaces. */ 99 100 static int ifconfig(int argc, char *const *argv, int iscreate, 101 const struct afswtch *afp); 102 static void status(const struct afswtch *afp, const struct sockaddr_dl *sdl, 103 struct ifaddrs *ifa); 104 static void tunnel_status(int s); 105 static void usage(void); 106 107 static struct afswtch *af_getbyname(const char *name); 108 static struct afswtch *af_getbyfamily(int af); 109 static void af_other_status(int); 110 111 static struct option *opts = NULL; 112 113 void 114 opt_register(struct option *p) 115 { 116 p->next = opts; 117 opts = p; 118 } 119 120 static void 121 usage(void) 122 { 123 char options[1024]; 124 struct option *p; 125 126 /* XXX not right but close enough for now */ 127 options[0] = '\0'; 128 for (p = opts; p != NULL; p = p->next) { 129 strlcat(options, p->opt_usage, sizeof(options)); 130 strlcat(options, " ", sizeof(options)); 131 } 132 133 fprintf(stderr, 134 "usage: ifconfig %sinterface address_family [address [dest_address]]\n" 135 " [parameters]\n" 136 " ifconfig interface create\n" 137 " ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n" 138 " ifconfig -l [-d] [-u] [address_family]\n" 139 " ifconfig %s[-d] [-m] [-u] [-v]\n", 140 options, options, options); 141 exit(1); 142 } 143 144 int 145 main(int argc, char *argv[]) 146 { 147 int c, all, namesonly, downonly, uponly; 148 const struct afswtch *afp = NULL; 149 int ifindex; 150 struct ifaddrs *ifap, *ifa; 151 struct ifreq paifr; 152 const struct sockaddr_dl *sdl; 153 char options[1024], *cp, *namecp = NULL; 154 const char *ifname; 155 struct option *p; 156 size_t iflen; 157 158 all = downonly = uponly = namesonly = noload = verbose = 0; 159 160 /* Parse leading line options */ 161 strlcpy(options, "adklmnuv", sizeof(options)); 162 for (p = opts; p != NULL; p = p->next) 163 strlcat(options, p->opt, sizeof(options)); 164 while ((c = getopt(argc, argv, options)) != -1) { 165 switch (c) { 166 case 'a': /* scan all interfaces */ 167 all++; 168 break; 169 case 'd': /* restrict scan to "down" interfaces */ 170 downonly++; 171 break; 172 case 'k': 173 printkeys++; 174 break; 175 case 'l': /* scan interface names only */ 176 namesonly++; 177 break; 178 case 'm': /* show media choices in status */ 179 supmedia = 1; 180 break; 181 case 'n': /* suppress module loading */ 182 noload++; 183 break; 184 case 'u': /* restrict scan to "up" interfaces */ 185 uponly++; 186 break; 187 case 'v': 188 verbose++; 189 break; 190 default: 191 for (p = opts; p != NULL; p = p->next) 192 if (p->opt[0] == c) { 193 p->cb(optarg); 194 break; 195 } 196 if (p == NULL) 197 usage(); 198 break; 199 } 200 } 201 argc -= optind; 202 argv += optind; 203 204 /* -l cannot be used with -a or -m */ 205 if (namesonly && (all || supmedia)) 206 usage(); 207 208 /* nonsense.. */ 209 if (uponly && downonly) 210 usage(); 211 212 /* no arguments is equivalent to '-a' */ 213 if (!namesonly && argc < 1) 214 all = 1; 215 216 /* -a and -l allow an address family arg to limit the output */ 217 if (all || namesonly) { 218 if (argc > 1) 219 usage(); 220 221 ifname = NULL; 222 ifindex = 0; 223 if (argc == 1) { 224 afp = af_getbyname(*argv); 225 if (afp == NULL) { 226 warnx("Address family '%s' unknown.", *argv); 227 usage(); 228 } 229 if (afp->af_name != NULL) 230 argc--, argv++; 231 /* leave with afp non-zero */ 232 } 233 } else { 234 /* not listing, need an argument */ 235 if (argc < 1) 236 usage(); 237 238 ifname = *argv; 239 argc--, argv++; 240 241 /* check and maybe load support for this interface */ 242 ifmaybeload(ifname); 243 244 ifindex = if_nametoindex(ifname); 245 if (ifindex == 0) { 246 /* 247 * NOTE: We must special-case the `create' command 248 * right here as we would otherwise fail when trying 249 * to find the interface. 250 */ 251 if (argc > 0 && (strcmp(argv[0], "create") == 0 || 252 strcmp(argv[0], "plumb") == 0)) { 253 iflen = strlcpy(name, ifname, sizeof(name)); 254 if (iflen >= sizeof(name)) 255 errx(1, "%s: cloning name too long", 256 ifname); 257 ifconfig(argc, argv, 1, NULL); 258 exit(0); 259 } 260 #ifdef JAIL 261 /* 262 * NOTE: We have to special-case the `-vnet' command 263 * right here as we would otherwise fail when trying 264 * to find the interface as it lives in another vnet. 265 */ 266 if (argc > 0 && (strcmp(argv[0], "-vnet") == 0)) { 267 iflen = strlcpy(name, ifname, sizeof(name)); 268 if (iflen >= sizeof(name)) 269 errx(1, "%s: interface name too long", 270 ifname); 271 ifconfig(argc, argv, 0, NULL); 272 exit(0); 273 } 274 #endif 275 errx(1, "interface %s does not exist", ifname); 276 } 277 } 278 279 /* Check for address family */ 280 if (argc > 0) { 281 afp = af_getbyname(*argv); 282 if (afp != NULL) 283 argc--, argv++; 284 } 285 286 if (getifaddrs(&ifap) != 0) 287 err(EXIT_FAILURE, "getifaddrs"); 288 cp = NULL; 289 ifindex = 0; 290 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 291 memset(&paifr, 0, sizeof(paifr)); 292 strncpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name)); 293 if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) { 294 memcpy(&paifr.ifr_addr, ifa->ifa_addr, 295 ifa->ifa_addr->sa_len); 296 } 297 298 if (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0) 299 continue; 300 if (ifa->ifa_addr->sa_family == AF_LINK) 301 sdl = (const struct sockaddr_dl *) ifa->ifa_addr; 302 else 303 sdl = NULL; 304 if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0 && !namesonly) 305 continue; 306 iflen = strlcpy(name, ifa->ifa_name, sizeof(name)); 307 if (iflen >= sizeof(name)) { 308 warnx("%s: interface name too long, skipping", 309 ifa->ifa_name); 310 continue; 311 } 312 cp = ifa->ifa_name; 313 314 if ((ifa->ifa_flags & IFF_CANTCONFIG) != 0) 315 continue; 316 if (downonly && (ifa->ifa_flags & IFF_UP) != 0) 317 continue; 318 if (uponly && (ifa->ifa_flags & IFF_UP) == 0) 319 continue; 320 /* 321 * Are we just listing the interfaces? 322 */ 323 if (namesonly) { 324 if (namecp == cp) 325 continue; 326 if (afp != NULL) { 327 /* special case for "ether" address family */ 328 if (!strcmp(afp->af_name, "ether")) { 329 if (sdl == NULL || 330 (sdl->sdl_type != IFT_ETHER && 331 sdl->sdl_type != IFT_L2VLAN && 332 sdl->sdl_type != IFT_BRIDGE) || 333 sdl->sdl_alen != ETHER_ADDR_LEN) 334 continue; 335 } else { 336 if (ifa->ifa_addr->sa_family != afp->af_af) 337 continue; 338 } 339 } 340 namecp = cp; 341 ifindex++; 342 if (ifindex > 1) 343 printf(" "); 344 fputs(name, stdout); 345 continue; 346 } 347 ifindex++; 348 349 if (argc > 0) 350 ifconfig(argc, argv, 0, afp); 351 else 352 status(afp, sdl, ifa); 353 } 354 if (namesonly) 355 printf("\n"); 356 freeifaddrs(ifap); 357 358 exit(0); 359 } 360 361 static struct afswtch *afs = NULL; 362 363 void 364 af_register(struct afswtch *p) 365 { 366 p->af_next = afs; 367 afs = p; 368 } 369 370 static struct afswtch * 371 af_getbyname(const char *name) 372 { 373 struct afswtch *afp; 374 375 for (afp = afs; afp != NULL; afp = afp->af_next) 376 if (strcmp(afp->af_name, name) == 0) 377 return afp; 378 return NULL; 379 } 380 381 static struct afswtch * 382 af_getbyfamily(int af) 383 { 384 struct afswtch *afp; 385 386 for (afp = afs; afp != NULL; afp = afp->af_next) 387 if (afp->af_af == af) 388 return afp; 389 return NULL; 390 } 391 392 static void 393 af_other_status(int s) 394 { 395 struct afswtch *afp; 396 uint8_t afmask[howmany(AF_MAX, NBBY)]; 397 398 memset(afmask, 0, sizeof(afmask)); 399 for (afp = afs; afp != NULL; afp = afp->af_next) { 400 if (afp->af_other_status == NULL) 401 continue; 402 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 403 continue; 404 afp->af_other_status(s); 405 setbit(afmask, afp->af_af); 406 } 407 } 408 409 static void 410 af_all_tunnel_status(int s) 411 { 412 struct afswtch *afp; 413 uint8_t afmask[howmany(AF_MAX, NBBY)]; 414 415 memset(afmask, 0, sizeof(afmask)); 416 for (afp = afs; afp != NULL; afp = afp->af_next) { 417 if (afp->af_status_tunnel == NULL) 418 continue; 419 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 420 continue; 421 afp->af_status_tunnel(s); 422 setbit(afmask, afp->af_af); 423 } 424 } 425 426 static struct cmd *cmds = NULL; 427 428 void 429 cmd_register(struct cmd *p) 430 { 431 p->c_next = cmds; 432 cmds = p; 433 } 434 435 static const struct cmd * 436 cmd_lookup(const char *name, int iscreate) 437 { 438 #define N(a) (sizeof(a)/sizeof(a[0])) 439 const struct cmd *p; 440 441 for (p = cmds; p != NULL; p = p->c_next) 442 if (strcmp(name, p->c_name) == 0) { 443 if (iscreate) { 444 if (p->c_iscloneop) 445 return p; 446 } else { 447 if (!p->c_iscloneop) 448 return p; 449 } 450 } 451 return NULL; 452 #undef N 453 } 454 455 struct callback { 456 callback_func *cb_func; 457 void *cb_arg; 458 struct callback *cb_next; 459 }; 460 static struct callback *callbacks = NULL; 461 462 void 463 callback_register(callback_func *func, void *arg) 464 { 465 struct callback *cb; 466 467 cb = malloc(sizeof(struct callback)); 468 if (cb == NULL) 469 errx(1, "unable to allocate memory for callback"); 470 cb->cb_func = func; 471 cb->cb_arg = arg; 472 cb->cb_next = callbacks; 473 callbacks = cb; 474 } 475 476 /* specially-handled commands */ 477 static void setifaddr(const char *, int, int, const struct afswtch *); 478 static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr); 479 480 static void setifdstaddr(const char *, int, int, const struct afswtch *); 481 static const struct cmd setifdstaddr_cmd = 482 DEF_CMD("ifdstaddr", 0, setifdstaddr); 483 484 static int 485 ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *uafp) 486 { 487 const struct afswtch *afp, *nafp; 488 const struct cmd *p; 489 struct callback *cb; 490 int s; 491 492 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name); 493 afp = NULL; 494 if (uafp != NULL) 495 afp = uafp; 496 /* 497 * This is the historical "accident" allowing users to configure IPv4 498 * addresses without the "inet" keyword which while a nice feature has 499 * proven to complicate other things. We cannot remove this but only 500 * make sure we will never have a similar implicit default for IPv6 or 501 * any other address familiy. We need a fallback though for 502 * ifconfig IF up/down etc. to work without INET support as people 503 * never used ifconfig IF link up/down, etc. either. 504 */ 505 #ifndef RESCUE 506 #ifdef INET 507 if (afp == NULL && feature_present("inet")) 508 afp = af_getbyname("inet"); 509 #endif 510 #endif 511 if (afp == NULL) 512 afp = af_getbyname("link"); 513 if (afp == NULL) { 514 warnx("Please specify an address_family."); 515 usage(); 516 } 517 top: 518 ifr.ifr_addr.sa_family = 519 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ? 520 AF_LOCAL : afp->af_af; 521 522 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 && 523 (uafp != NULL || errno != EAFNOSUPPORT || 524 (s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0)) 525 err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family); 526 527 while (argc > 0) { 528 p = cmd_lookup(*argv, iscreate); 529 if (iscreate && p == NULL) { 530 /* 531 * Push the clone create callback so the new 532 * device is created and can be used for any 533 * remaining arguments. 534 */ 535 cb = callbacks; 536 if (cb == NULL) 537 errx(1, "internal error, no callback"); 538 callbacks = cb->cb_next; 539 cb->cb_func(s, cb->cb_arg); 540 iscreate = 0; 541 /* 542 * Handle any address family spec that 543 * immediately follows and potentially 544 * recreate the socket. 545 */ 546 nafp = af_getbyname(*argv); 547 if (nafp != NULL) { 548 argc--, argv++; 549 if (nafp != afp) { 550 close(s); 551 afp = nafp; 552 goto top; 553 } 554 } 555 /* 556 * Look for a normal parameter. 557 */ 558 continue; 559 } 560 if (p == NULL) { 561 /* 562 * Not a recognized command, choose between setting 563 * the interface address and the dst address. 564 */ 565 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd); 566 } 567 if (p->c_u.c_func || p->c_u.c_func2) { 568 if (p->c_parameter == NEXTARG) { 569 if (argv[1] == NULL) 570 errx(1, "'%s' requires argument", 571 p->c_name); 572 p->c_u.c_func(argv[1], 0, s, afp); 573 argc--, argv++; 574 } else if (p->c_parameter == OPTARG) { 575 p->c_u.c_func(argv[1], 0, s, afp); 576 if (argv[1] != NULL) 577 argc--, argv++; 578 } else if (p->c_parameter == NEXTARG2) { 579 if (argc < 3) 580 errx(1, "'%s' requires 2 arguments", 581 p->c_name); 582 p->c_u.c_func2(argv[1], argv[2], s, afp); 583 argc -= 2, argv += 2; 584 } else 585 p->c_u.c_func(*argv, p->c_parameter, s, afp); 586 } 587 argc--, argv++; 588 } 589 590 /* 591 * Do any post argument processing required by the address family. 592 */ 593 if (afp->af_postproc != NULL) 594 afp->af_postproc(s, afp); 595 /* 596 * Do deferred callbacks registered while processing 597 * command-line arguments. 598 */ 599 for (cb = callbacks; cb != NULL; cb = cb->cb_next) 600 cb->cb_func(s, cb->cb_arg); 601 /* 602 * Do deferred operations. 603 */ 604 if (clearaddr) { 605 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) { 606 warnx("interface %s cannot change %s addresses!", 607 name, afp->af_name); 608 clearaddr = 0; 609 } 610 } 611 if (clearaddr) { 612 int ret; 613 strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name); 614 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq); 615 if (ret < 0) { 616 if (errno == EADDRNOTAVAIL && (doalias >= 0)) { 617 /* means no previous address for interface */ 618 } else 619 Perror("ioctl (SIOCDIFADDR)"); 620 } 621 } 622 if (newaddr) { 623 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) { 624 warnx("interface %s cannot change %s addresses!", 625 name, afp->af_name); 626 newaddr = 0; 627 } 628 } 629 if (newaddr && (setaddr || setmask)) { 630 strncpy(afp->af_addreq, name, sizeof ifr.ifr_name); 631 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0) 632 Perror("ioctl (SIOCAIFADDR)"); 633 } 634 635 close(s); 636 return(0); 637 } 638 639 /*ARGSUSED*/ 640 static void 641 setifaddr(const char *addr, int param, int s, const struct afswtch *afp) 642 { 643 if (afp->af_getaddr == NULL) 644 return; 645 /* 646 * Delay the ioctl to set the interface addr until flags are all set. 647 * The address interpretation may depend on the flags, 648 * and the flags may change when the address is set. 649 */ 650 setaddr++; 651 if (doalias == 0 && afp->af_af != AF_LINK) 652 clearaddr = 1; 653 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); 654 } 655 656 static void 657 settunnel(const char *src, const char *dst, int s, const struct afswtch *afp) 658 { 659 struct addrinfo *srcres, *dstres; 660 int ecode; 661 662 if (afp->af_settunnel == NULL) { 663 warn("address family %s does not support tunnel setup", 664 afp->af_name); 665 return; 666 } 667 668 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) 669 errx(1, "error in parsing address string: %s", 670 gai_strerror(ecode)); 671 672 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) 673 errx(1, "error in parsing address string: %s", 674 gai_strerror(ecode)); 675 676 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 677 errx(1, 678 "source and destination address families do not match"); 679 680 afp->af_settunnel(s, srcres, dstres); 681 682 freeaddrinfo(srcres); 683 freeaddrinfo(dstres); 684 } 685 686 /* ARGSUSED */ 687 static void 688 deletetunnel(const char *vname, int param, int s, const struct afswtch *afp) 689 { 690 691 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0) 692 err(1, "SIOCDIFPHYADDR"); 693 } 694 695 #ifdef JAIL 696 static void 697 setifvnet(const char *jname, int dummy __unused, int s, 698 const struct afswtch *afp) 699 { 700 struct ifreq my_ifr; 701 702 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 703 my_ifr.ifr_jid = jail_getid(jname); 704 if (my_ifr.ifr_jid < 0) 705 errx(1, "%s", jail_errmsg); 706 if (ioctl(s, SIOCSIFVNET, &my_ifr) < 0) 707 err(1, "SIOCSIFVNET"); 708 } 709 710 static void 711 setifrvnet(const char *jname, int dummy __unused, int s, 712 const struct afswtch *afp) 713 { 714 struct ifreq my_ifr; 715 716 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 717 my_ifr.ifr_jid = jail_getid(jname); 718 if (my_ifr.ifr_jid < 0) 719 errx(1, "%s", jail_errmsg); 720 if (ioctl(s, SIOCSIFRVNET, &my_ifr) < 0) 721 err(1, "SIOCSIFRVNET(%d, %s)", my_ifr.ifr_jid, my_ifr.ifr_name); 722 } 723 #endif 724 725 static void 726 setifnetmask(const char *addr, int dummy __unused, int s, 727 const struct afswtch *afp) 728 { 729 if (afp->af_getaddr != NULL) { 730 setmask++; 731 afp->af_getaddr(addr, MASK); 732 } 733 } 734 735 static void 736 setifbroadaddr(const char *addr, int dummy __unused, int s, 737 const struct afswtch *afp) 738 { 739 if (afp->af_getaddr != NULL) 740 afp->af_getaddr(addr, DSTADDR); 741 } 742 743 static void 744 setifipdst(const char *addr, int dummy __unused, int s, 745 const struct afswtch *afp) 746 { 747 const struct afswtch *inet; 748 749 inet = af_getbyname("inet"); 750 if (inet == NULL) 751 return; 752 inet->af_getaddr(addr, DSTADDR); 753 clearaddr = 0; 754 newaddr = 0; 755 } 756 757 static void 758 notealias(const char *addr, int param, int s, const struct afswtch *afp) 759 { 760 #define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr)) 761 if (setaddr && doalias == 0 && param < 0) 762 if (afp->af_addreq != NULL && afp->af_ridreq != NULL) 763 bcopy((caddr_t)rqtosa(af_addreq), 764 (caddr_t)rqtosa(af_ridreq), 765 rqtosa(af_addreq)->sa_len); 766 doalias = param; 767 if (param < 0) { 768 clearaddr = 1; 769 newaddr = 0; 770 } else 771 clearaddr = 0; 772 #undef rqtosa 773 } 774 775 /*ARGSUSED*/ 776 static void 777 setifdstaddr(const char *addr, int param __unused, int s, 778 const struct afswtch *afp) 779 { 780 if (afp->af_getaddr != NULL) 781 afp->af_getaddr(addr, DSTADDR); 782 } 783 784 /* 785 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion 786 * of the ifreq structure, which may confuse other parts of ifconfig. 787 * Make a private copy so we can avoid that. 788 */ 789 static void 790 setifflags(const char *vname, int value, int s, const struct afswtch *afp) 791 { 792 struct ifreq my_ifr; 793 int flags; 794 795 memset(&my_ifr, 0, sizeof(my_ifr)); 796 (void) strlcpy(my_ifr.ifr_name, name, sizeof(my_ifr.ifr_name)); 797 798 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) { 799 Perror("ioctl (SIOCGIFFLAGS)"); 800 exit(1); 801 } 802 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16); 803 804 if (value < 0) { 805 value = -value; 806 flags &= ~value; 807 } else 808 flags |= value; 809 my_ifr.ifr_flags = flags & 0xffff; 810 my_ifr.ifr_flagshigh = flags >> 16; 811 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0) 812 Perror(vname); 813 } 814 815 void 816 setifcap(const char *vname, int value, int s, const struct afswtch *afp) 817 { 818 int flags; 819 820 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) { 821 Perror("ioctl (SIOCGIFCAP)"); 822 exit(1); 823 } 824 flags = ifr.ifr_curcap; 825 if (value < 0) { 826 value = -value; 827 flags &= ~value; 828 } else 829 flags |= value; 830 flags &= ifr.ifr_reqcap; 831 ifr.ifr_reqcap = flags; 832 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0) 833 Perror(vname); 834 } 835 836 static void 837 setifmetric(const char *val, int dummy __unused, int s, 838 const struct afswtch *afp) 839 { 840 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 841 ifr.ifr_metric = atoi(val); 842 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0) 843 warn("ioctl (set metric)"); 844 } 845 846 static void 847 setifmtu(const char *val, int dummy __unused, int s, 848 const struct afswtch *afp) 849 { 850 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 851 ifr.ifr_mtu = atoi(val); 852 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0) 853 warn("ioctl (set mtu)"); 854 } 855 856 static void 857 setifname(const char *val, int dummy __unused, int s, 858 const struct afswtch *afp) 859 { 860 char *newname; 861 862 newname = strdup(val); 863 if (newname == NULL) { 864 warn("no memory to set ifname"); 865 return; 866 } 867 ifr.ifr_data = newname; 868 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 869 warn("ioctl (set name)"); 870 free(newname); 871 return; 872 } 873 strlcpy(name, newname, sizeof(name)); 874 free(newname); 875 } 876 877 /* ARGSUSED */ 878 static void 879 setifdescr(const char *val, int dummy __unused, int s, 880 const struct afswtch *afp) 881 { 882 char *newdescr; 883 884 ifr.ifr_buffer.length = strlen(val) + 1; 885 if (ifr.ifr_buffer.length == 1) { 886 ifr.ifr_buffer.buffer = newdescr = NULL; 887 ifr.ifr_buffer.length = 0; 888 } else { 889 newdescr = strdup(val); 890 ifr.ifr_buffer.buffer = newdescr; 891 if (newdescr == NULL) { 892 warn("no memory to set ifdescr"); 893 return; 894 } 895 } 896 897 if (ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) 898 warn("ioctl (set descr)"); 899 900 free(newdescr); 901 } 902 903 /* ARGSUSED */ 904 static void 905 unsetifdescr(const char *val, int value, int s, const struct afswtch *afp) 906 { 907 908 setifdescr("", 0, s, 0); 909 } 910 911 #define IFFBITS \ 912 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \ 913 "\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ 914 "\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP" 915 916 #define IFCAPBITS \ 917 "\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \ 918 "\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \ 919 "\17TOE4\20TOE6\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE\25NETMAP" \ 920 "\26RXCSUM_IPV6\27TXCSUM_IPV6" 921 922 /* 923 * Print the status of the interface. If an address family was 924 * specified, show only it; otherwise, show them all. 925 */ 926 static void 927 status(const struct afswtch *afp, const struct sockaddr_dl *sdl, 928 struct ifaddrs *ifa) 929 { 930 struct ifaddrs *ift; 931 int allfamilies, s; 932 struct ifstat ifs; 933 934 if (afp == NULL) { 935 allfamilies = 1; 936 ifr.ifr_addr.sa_family = AF_LOCAL; 937 } else { 938 allfamilies = 0; 939 ifr.ifr_addr.sa_family = 940 afp->af_af == AF_LINK ? AF_LOCAL : afp->af_af; 941 } 942 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 943 944 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0); 945 if (s < 0) 946 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 947 948 printf("%s: ", name); 949 printb("flags", ifa->ifa_flags, IFFBITS); 950 if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1) 951 printf(" metric %d", ifr.ifr_metric); 952 if (ioctl(s, SIOCGIFMTU, &ifr) != -1) 953 printf(" mtu %d", ifr.ifr_mtu); 954 putchar('\n'); 955 956 for (;;) { 957 if ((descr = reallocf(descr, descrlen)) != NULL) { 958 ifr.ifr_buffer.buffer = descr; 959 ifr.ifr_buffer.length = descrlen; 960 if (ioctl(s, SIOCGIFDESCR, &ifr) == 0) { 961 if (ifr.ifr_buffer.buffer == descr) { 962 if (strlen(descr) > 0) 963 printf("\tdescription: %s\n", 964 descr); 965 } else if (ifr.ifr_buffer.length > descrlen) { 966 descrlen = ifr.ifr_buffer.length; 967 continue; 968 } 969 } 970 } else 971 warn("unable to allocate memory for interface" 972 "description"); 973 break; 974 } 975 976 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) { 977 if (ifr.ifr_curcap != 0) { 978 printb("\toptions", ifr.ifr_curcap, IFCAPBITS); 979 putchar('\n'); 980 } 981 if (supmedia && ifr.ifr_reqcap != 0) { 982 printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS); 983 putchar('\n'); 984 } 985 } 986 987 tunnel_status(s); 988 989 for (ift = ifa; ift != NULL; ift = ift->ifa_next) { 990 if (ift->ifa_addr == NULL) 991 continue; 992 if (strcmp(ifa->ifa_name, ift->ifa_name) != 0) 993 continue; 994 if (allfamilies) { 995 const struct afswtch *p; 996 p = af_getbyfamily(ift->ifa_addr->sa_family); 997 if (p != NULL && p->af_status != NULL) 998 p->af_status(s, ift); 999 } else if (afp->af_af == ift->ifa_addr->sa_family) 1000 afp->af_status(s, ift); 1001 } 1002 #if 0 1003 if (allfamilies || afp->af_af == AF_LINK) { 1004 const struct afswtch *lafp; 1005 1006 /* 1007 * Hack; the link level address is received separately 1008 * from the routing information so any address is not 1009 * handled above. Cobble together an entry and invoke 1010 * the status method specially. 1011 */ 1012 lafp = af_getbyname("lladdr"); 1013 if (lafp != NULL) { 1014 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; 1015 lafp->af_status(s, &info); 1016 } 1017 } 1018 #endif 1019 if (allfamilies) 1020 af_other_status(s); 1021 else if (afp->af_other_status != NULL) 1022 afp->af_other_status(s); 1023 1024 strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name); 1025 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0) 1026 printf("%s", ifs.ascii); 1027 1028 close(s); 1029 return; 1030 } 1031 1032 static void 1033 tunnel_status(int s) 1034 { 1035 af_all_tunnel_status(s); 1036 } 1037 1038 void 1039 Perror(const char *cmd) 1040 { 1041 switch (errno) { 1042 1043 case ENXIO: 1044 errx(1, "%s: no such interface", cmd); 1045 break; 1046 1047 case EPERM: 1048 errx(1, "%s: permission denied", cmd); 1049 break; 1050 1051 default: 1052 err(1, "%s", cmd); 1053 } 1054 } 1055 1056 /* 1057 * Print a value a la the %b format of the kernel's printf 1058 */ 1059 void 1060 printb(const char *s, unsigned v, const char *bits) 1061 { 1062 int i, any = 0; 1063 char c; 1064 1065 if (bits && *bits == 8) 1066 printf("%s=%o", s, v); 1067 else 1068 printf("%s=%x", s, v); 1069 bits++; 1070 if (bits) { 1071 putchar('<'); 1072 while ((i = *bits++) != '\0') { 1073 if (v & (1 << (i-1))) { 1074 if (any) 1075 putchar(','); 1076 any = 1; 1077 for (; (c = *bits) > 32; bits++) 1078 putchar(c); 1079 } else 1080 for (; *bits > 32; bits++) 1081 ; 1082 } 1083 putchar('>'); 1084 } 1085 } 1086 1087 void 1088 print_vhid(const struct ifaddrs *ifa, const char *s) 1089 { 1090 struct if_data *ifd; 1091 1092 if (ifa->ifa_data == NULL) 1093 return; 1094 1095 ifd = ifa->ifa_data; 1096 if (ifd->ifi_vhid == 0) 1097 return; 1098 1099 printf("vhid %d ", ifd->ifi_vhid); 1100 } 1101 1102 void 1103 ifmaybeload(const char *name) 1104 { 1105 #define MOD_PREFIX_LEN 3 /* "if_" */ 1106 struct module_stat mstat; 1107 int fileid, modid; 1108 char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp; 1109 const char *cp; 1110 1111 /* loading suppressed by the user */ 1112 if (noload) 1113 return; 1114 1115 /* trim the interface number off the end */ 1116 strlcpy(ifname, name, sizeof(ifname)); 1117 for (dp = ifname; *dp != 0; dp++) 1118 if (isdigit(*dp)) { 1119 *dp = 0; 1120 break; 1121 } 1122 1123 /* turn interface and unit into module name */ 1124 strcpy(ifkind, "if_"); 1125 strlcpy(ifkind + MOD_PREFIX_LEN, ifname, 1126 sizeof(ifkind) - MOD_PREFIX_LEN); 1127 1128 /* scan files in kernel */ 1129 mstat.version = sizeof(struct module_stat); 1130 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { 1131 /* scan modules in file */ 1132 for (modid = kldfirstmod(fileid); modid > 0; 1133 modid = modfnext(modid)) { 1134 if (modstat(modid, &mstat) < 0) 1135 continue; 1136 /* strip bus name if present */ 1137 if ((cp = strchr(mstat.name, '/')) != NULL) { 1138 cp++; 1139 } else { 1140 cp = mstat.name; 1141 } 1142 /* already loaded? */ 1143 if (strncmp(ifname, cp, strlen(ifname) + 1) == 0 || 1144 strncmp(ifkind, cp, strlen(ifkind) + 1) == 0) 1145 return; 1146 } 1147 } 1148 1149 /* not present, we should try to load it */ 1150 kldload(ifkind); 1151 } 1152 1153 static struct cmd basic_cmds[] = { 1154 DEF_CMD("up", IFF_UP, setifflags), 1155 DEF_CMD("down", -IFF_UP, setifflags), 1156 DEF_CMD("arp", -IFF_NOARP, setifflags), 1157 DEF_CMD("-arp", IFF_NOARP, setifflags), 1158 DEF_CMD("debug", IFF_DEBUG, setifflags), 1159 DEF_CMD("-debug", -IFF_DEBUG, setifflags), 1160 DEF_CMD_ARG("description", setifdescr), 1161 DEF_CMD_ARG("descr", setifdescr), 1162 DEF_CMD("-description", 0, unsetifdescr), 1163 DEF_CMD("-descr", 0, unsetifdescr), 1164 DEF_CMD("promisc", IFF_PPROMISC, setifflags), 1165 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags), 1166 DEF_CMD("add", IFF_UP, notealias), 1167 DEF_CMD("alias", IFF_UP, notealias), 1168 DEF_CMD("-alias", -IFF_UP, notealias), 1169 DEF_CMD("delete", -IFF_UP, notealias), 1170 DEF_CMD("remove", -IFF_UP, notealias), 1171 #ifdef notdef 1172 #define EN_SWABIPS 0x1000 1173 DEF_CMD("swabips", EN_SWABIPS, setifflags), 1174 DEF_CMD("-swabips", -EN_SWABIPS, setifflags), 1175 #endif 1176 DEF_CMD_ARG("netmask", setifnetmask), 1177 DEF_CMD_ARG("metric", setifmetric), 1178 DEF_CMD_ARG("broadcast", setifbroadaddr), 1179 DEF_CMD_ARG("ipdst", setifipdst), 1180 DEF_CMD_ARG2("tunnel", settunnel), 1181 DEF_CMD("-tunnel", 0, deletetunnel), 1182 DEF_CMD("deletetunnel", 0, deletetunnel), 1183 #ifdef JAIL 1184 DEF_CMD_ARG("vnet", setifvnet), 1185 DEF_CMD_ARG("-vnet", setifrvnet), 1186 #endif 1187 DEF_CMD("link0", IFF_LINK0, setifflags), 1188 DEF_CMD("-link0", -IFF_LINK0, setifflags), 1189 DEF_CMD("link1", IFF_LINK1, setifflags), 1190 DEF_CMD("-link1", -IFF_LINK1, setifflags), 1191 DEF_CMD("link2", IFF_LINK2, setifflags), 1192 DEF_CMD("-link2", -IFF_LINK2, setifflags), 1193 DEF_CMD("monitor", IFF_MONITOR, setifflags), 1194 DEF_CMD("-monitor", -IFF_MONITOR, setifflags), 1195 DEF_CMD("staticarp", IFF_STATICARP, setifflags), 1196 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), 1197 DEF_CMD("rxcsum6", IFCAP_RXCSUM_IPV6, setifcap), 1198 DEF_CMD("-rxcsum6", -IFCAP_RXCSUM_IPV6, setifcap), 1199 DEF_CMD("txcsum6", IFCAP_TXCSUM_IPV6, setifcap), 1200 DEF_CMD("-txcsum6", -IFCAP_TXCSUM_IPV6, setifcap), 1201 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), 1202 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), 1203 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), 1204 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), 1205 DEF_CMD("netcons", IFCAP_NETCONS, setifcap), 1206 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), 1207 DEF_CMD("polling", IFCAP_POLLING, setifcap), 1208 DEF_CMD("-polling", -IFCAP_POLLING, setifcap), 1209 DEF_CMD("tso6", IFCAP_TSO6, setifcap), 1210 DEF_CMD("-tso6", -IFCAP_TSO6, setifcap), 1211 DEF_CMD("tso4", IFCAP_TSO4, setifcap), 1212 DEF_CMD("-tso4", -IFCAP_TSO4, setifcap), 1213 DEF_CMD("tso", IFCAP_TSO, setifcap), 1214 DEF_CMD("-tso", -IFCAP_TSO, setifcap), 1215 DEF_CMD("toe", IFCAP_TOE, setifcap), 1216 DEF_CMD("-toe", -IFCAP_TOE, setifcap), 1217 DEF_CMD("lro", IFCAP_LRO, setifcap), 1218 DEF_CMD("-lro", -IFCAP_LRO, setifcap), 1219 DEF_CMD("wol", IFCAP_WOL, setifcap), 1220 DEF_CMD("-wol", -IFCAP_WOL, setifcap), 1221 DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap), 1222 DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap), 1223 DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap), 1224 DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap), 1225 DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap), 1226 DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap), 1227 DEF_CMD("normal", -IFF_LINK0, setifflags), 1228 DEF_CMD("compress", IFF_LINK0, setifflags), 1229 DEF_CMD("noicmp", IFF_LINK1, setifflags), 1230 DEF_CMD_ARG("mtu", setifmtu), 1231 DEF_CMD_ARG("name", setifname), 1232 }; 1233 1234 static __constructor void 1235 ifconfig_ctor(void) 1236 { 1237 #define N(a) (sizeof(a) / sizeof(a[0])) 1238 size_t i; 1239 1240 for (i = 0; i < N(basic_cmds); i++) 1241 cmd_register(&basic_cmds[i]); 1242 #undef N 1243 } 1244