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