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