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 * $FreeBSD: src/sbin/ifconfig/ifconfig.c,v 1.113.2.4 2006/02/09 10:48:43 yar Exp $ 30 * $DragonFly: src/sbin/ifconfig/ifconfig.c,v 1.27 2006/05/05 14:53:41 sephe Exp $ 31 */ 32 33 #include <sys/param.h> 34 #include <sys/ioctl.h> 35 #include <sys/socket.h> 36 #include <sys/sysctl.h> 37 #include <sys/time.h> 38 #include <sys/module.h> 39 #include <sys/linker.h> 40 41 #include <net/ethernet.h> 42 #include <net/if.h> 43 #include <net/if_var.h> 44 #include <net/if_dl.h> 45 #include <net/if_types.h> 46 #include <net/route.h> 47 48 /* IP */ 49 #include <netinet/in.h> 50 #include <netinet/in_var.h> 51 #include <arpa/inet.h> 52 #include <netdb.h> 53 54 #include <ctype.h> 55 #include <err.h> 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 #include "ifconfig.h" 64 65 /* 66 * This macro returns the size of a struct sockaddr when passed 67 * through a routing socket. Basically we round up sa_len to 68 * a multiple of sizeof(long), with a minimum of sizeof(long). 69 * The check for a NULL pointer is just a convenience, probably never used. 70 * The case sa_len == 0 should only apply to empty structures. 71 */ 72 #define SA_SIZE(sa) \ 73 ( (!(sa) || ((struct sockaddr *)(sa))->sa_len == 0) ? \ 74 sizeof(long) : \ 75 1 + ( (((struct sockaddr *)(sa))->sa_len - 1) | (sizeof(long) - 1) ) ) 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 int flags; 86 int setaddr; 87 int setipdst; 88 int setmask; 89 int doalias; 90 int clearaddr; 91 int newaddr = 1; 92 int verbose; 93 94 int supmedia = 0; 95 int printkeys = 0; /* Print keying material for interfaces. */ 96 int printname = 0; /* Print the name of the created interface. */ 97 98 static int ifconfig(int argc, char *const *argv, const struct afswtch *afp); 99 static void status(const struct afswtch *afp, int addrcount, 100 struct sockaddr_dl *sdl, struct if_msghdr *ifm, 101 struct ifa_msghdr *ifam); 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 int need_nl = 0, count = 0; 147 const struct afswtch *afp = NULL; 148 int addrcount, ifindex; 149 struct if_msghdr *ifm, *nextifm; 150 struct ifa_msghdr *ifam; 151 struct sockaddr_dl *sdl; 152 char *buf, *lim, *next; 153 size_t needed; 154 int mib[6]; 155 char options[1024]; 156 struct option *p; 157 158 all = downonly = uponly = namesonly = verbose = 0; 159 160 /* Parse leading line options */ 161 strlcpy(options, "adklmuv", 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 'u': /* restrict scan to "up" interfaces */ 182 uponly++; 183 break; 184 case 'v': 185 verbose++; 186 break; 187 default: 188 for (p = opts; p != NULL; p = p->next) 189 if (p->opt[0] == c) { 190 p->cb(optarg); 191 break; 192 } 193 if (p == NULL) 194 usage(); 195 break; 196 } 197 } 198 argc -= optind; 199 argv += optind; 200 201 /* -l cannot be used with -a or -m */ 202 if (namesonly && (all || supmedia)) 203 usage(); 204 205 /* nonsense.. */ 206 if (uponly && downonly) 207 usage(); 208 209 /* no arguments is equivalent to '-a' */ 210 if (!namesonly && argc < 1) 211 all = 1; 212 213 /* -a and -l allow an address family arg to limit the output */ 214 if (all || namesonly) { 215 if (argc > 1) 216 usage(); 217 218 ifindex = 0; 219 if (argc == 1) { 220 afp = af_getbyname(*argv); 221 if (afp == NULL) 222 usage(); 223 if (afp->af_name != NULL) 224 argc--, argv++; 225 /* leave with afp non-zero */ 226 } 227 } else { 228 /* not listing, need an argument */ 229 if (argc < 1) 230 usage(); 231 232 strncpy(name, *argv, sizeof(name)); 233 argc--, argv++; 234 235 /* check and maybe load support for this interface */ 236 ifmaybeload(name); 237 238 /* 239 * NOTE: We must special-case the `create' command right 240 * here as we would otherwise fail when trying to find 241 * the interface. 242 */ 243 if (argc > 0 && (strcmp(argv[0], "create") == 0 || 244 strcmp(argv[0], "plumb") == 0)) { 245 clone_create(); 246 argc--, argv++; 247 if (argc == 0) 248 goto end; 249 } 250 ifindex = if_nametoindex(name); 251 if (ifindex == 0) 252 errx(1, "interface %s does not exist", name); 253 } 254 255 /* Check for address family */ 256 if (argc > 0) { 257 afp = af_getbyname(*argv); 258 if (afp != NULL) 259 argc--, argv++; 260 } 261 262 retry: 263 mib[0] = CTL_NET; 264 mib[1] = PF_ROUTE; 265 mib[2] = 0; 266 mib[3] = 0; /* address family */ 267 mib[4] = NET_RT_IFLIST; 268 mib[5] = ifindex; /* interface index */ 269 270 /* if particular family specified, only ask about it */ 271 if (afp != NULL) 272 mib[3] = afp->af_af; 273 274 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 275 errx(1, "iflist-sysctl-estimate"); 276 if ((buf = malloc(needed)) == NULL) 277 errx(1, "malloc"); 278 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 279 if (errno == ENOMEM && count++ < 10) { 280 warnx("Routing table grew, retrying"); 281 free(buf); 282 sleep(1); 283 goto retry; 284 } 285 errx(1, "actual retrieval of interface table"); 286 } 287 lim = buf + needed; 288 289 next = buf; 290 while (next < lim) { 291 292 ifm = (struct if_msghdr *)next; 293 294 if (ifm->ifm_type == RTM_IFINFO) { 295 #ifdef notyet 296 if (ifm->ifm_data.ifi_datalen == 0) 297 ifm->ifm_data.ifi_datalen = sizeof(struct if_data); 298 sdl = (struct sockaddr_dl *)((char *)ifm + sizeof(struct if_msghdr) - 299 sizeof(struct if_data) + ifm->ifm_data.ifi_datalen); 300 #else 301 sdl = (struct sockaddr_dl *)(ifm + 1); 302 #endif 303 flags = ifm->ifm_flags; 304 } else { 305 fprintf(stderr, "out of sync parsing NET_RT_IFLIST\n"); 306 fprintf(stderr, "expected %d, got %d\n", RTM_IFINFO, 307 ifm->ifm_type); 308 fprintf(stderr, "msglen = %d\n", ifm->ifm_msglen); 309 fprintf(stderr, "buf:%p, next:%p, lim:%p\n", buf, next, 310 lim); 311 exit (1); 312 } 313 314 next += ifm->ifm_msglen; 315 ifam = NULL; 316 addrcount = 0; 317 while (next < lim) { 318 319 nextifm = (struct if_msghdr *)next; 320 321 if (nextifm->ifm_type != RTM_NEWADDR) 322 break; 323 324 if (ifam == NULL) 325 ifam = (struct ifa_msghdr *)nextifm; 326 327 addrcount++; 328 next += nextifm->ifm_msglen; 329 } 330 memcpy(name, sdl->sdl_data, 331 sizeof(name) < sdl->sdl_nlen ? 332 sizeof(name)-1 : sdl->sdl_nlen); 333 name[sizeof(name) < sdl->sdl_nlen ? 334 sizeof(name)-1 : sdl->sdl_nlen] = '\0'; 335 336 if (all || namesonly) { 337 if (uponly) 338 if ((flags & IFF_UP) == 0) 339 continue; /* not up */ 340 if (downonly) 341 if (flags & IFF_UP) 342 continue; /* not down */ 343 if (namesonly) { 344 if (afp == NULL || afp->af_af != AF_LINK || 345 sdl->sdl_type == IFT_ETHER) { 346 if (need_nl) 347 putchar(' '); 348 fputs(name, stdout); 349 need_nl++; 350 } 351 continue; 352 } 353 } 354 355 if (argc > 0) 356 ifconfig(argc, argv, afp); 357 else 358 status(afp, addrcount, sdl, ifm, ifam); 359 } 360 free(buf); 361 362 if (namesonly && need_nl > 0) 363 putchar('\n'); 364 end: 365 if (printname) 366 printf("%s\n", name); 367 368 exit (0); 369 } 370 371 static struct afswtch *afs = NULL; 372 373 void 374 af_register(struct afswtch *p) 375 { 376 p->af_next = afs; 377 afs = p; 378 } 379 380 static struct afswtch * 381 af_getbyname(const char *name) 382 { 383 struct afswtch *afp; 384 385 for (afp = afs; afp != NULL; afp = afp->af_next) 386 if (strcmp(afp->af_name, name) == 0) 387 return afp; 388 return NULL; 389 } 390 391 static struct afswtch * 392 af_getbyfamily(int af) 393 { 394 struct afswtch *afp; 395 396 for (afp = afs; afp != NULL; afp = afp->af_next) 397 if (afp->af_af == af) 398 return afp; 399 return NULL; 400 } 401 402 static void 403 af_other_status(int s) 404 { 405 struct afswtch *afp; 406 uint8_t afmask[howmany(AF_MAX, NBBY)]; 407 408 memset(afmask, 0, sizeof(afmask)); 409 for (afp = afs; afp != NULL; afp = afp->af_next) { 410 if (afp->af_other_status == NULL) 411 continue; 412 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 413 continue; 414 afp->af_other_status(s); 415 setbit(afmask, afp->af_af); 416 } 417 } 418 419 static void 420 af_all_tunnel_status(int s) 421 { 422 struct afswtch *afp; 423 uint8_t afmask[howmany(AF_MAX, NBBY)]; 424 425 memset(afmask, 0, sizeof(afmask)); 426 for (afp = afs; afp != NULL; afp = afp->af_next) { 427 if (afp->af_status_tunnel == NULL) 428 continue; 429 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 430 continue; 431 afp->af_status_tunnel(s); 432 setbit(afmask, afp->af_af); 433 } 434 } 435 436 static struct cmd *cmds = NULL; 437 438 void 439 cmd_register(struct cmd *p) 440 { 441 p->c_next = cmds; 442 cmds = p; 443 } 444 445 static const struct cmd * 446 cmd_lookup(const char *name) 447 { 448 #define N(a) (sizeof(a)/sizeof(a[0])) 449 const struct cmd *p; 450 451 for (p = cmds; p != NULL; p = p->c_next) 452 if (strcmp(name, p->c_name) == 0) 453 return p; 454 return NULL; 455 #undef N 456 } 457 458 struct callback { 459 callback_func *cb_func; 460 void *cb_arg; 461 struct callback *cb_next; 462 }; 463 static struct callback *callbacks = NULL; 464 465 void 466 callback_register(callback_func *func, void *arg) 467 { 468 struct callback *cb; 469 470 cb = malloc(sizeof(struct callback)); 471 if (cb == NULL) 472 errx(1, "unable to allocate memory for callback"); 473 cb->cb_func = func; 474 cb->cb_arg = arg; 475 cb->cb_next = callbacks; 476 callbacks = cb; 477 } 478 479 /* specially-handled commands */ 480 static void setifaddr(const char *, int, int, const struct afswtch *); 481 static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr); 482 483 static void setifdstaddr(const char *, int, int, const struct afswtch *); 484 static const struct cmd setifdstaddr_cmd = 485 DEF_CMD("ifdstaddr", 0, setifdstaddr); 486 487 static int 488 ifconfig(int argc, char *const *argv, const struct afswtch *afp) 489 { 490 struct callback *cb; 491 int s; 492 493 if (afp == NULL) 494 afp = af_getbyname("inet"); 495 ifr.ifr_addr.sa_family = 496 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ? 497 AF_INET : afp->af_af; 498 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name); 499 500 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0) 501 err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family); 502 503 while (argc > 0) { 504 const struct cmd *p; 505 506 p = cmd_lookup(*argv); 507 if (p == NULL) { 508 /* 509 * Not a recognized command, choose between setting 510 * the interface address and the dst address. 511 */ 512 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd); 513 } 514 if (p->c_u.c_func || p->c_u.c_func2) { 515 if (p->c_parameter == NEXTARG) { 516 if (argv[1] == NULL) 517 errx(1, "'%s' requires argument", 518 p->c_name); 519 p->c_u.c_func(argv[1], 0, s, afp); 520 argc--, argv++; 521 } else if (p->c_parameter == OPTARG) { 522 p->c_u.c_func(argv[1], 0, s, afp); 523 if (argv[1] != NULL) 524 argc--, argv++; 525 } else if (p->c_parameter == NEXTARG2) { 526 if (argc < 3) 527 errx(1, "'%s' requires 2 arguments", 528 p->c_name); 529 p->c_u.c_func2(argv[1], argv[2], s, afp); 530 argc -= 2, argv += 2; 531 } else 532 p->c_u.c_func(*argv, p->c_parameter, s, afp); 533 } 534 argc--, argv++; 535 } 536 537 /* 538 * Do any post argument processing required by the address family. 539 */ 540 if (afp->af_postproc != NULL) 541 afp->af_postproc(s, afp); 542 /* 543 * Do deferred callbacks registered while processing 544 * command-line arguments. 545 */ 546 for (cb = callbacks; cb != NULL; cb = cb->cb_next) 547 cb->cb_func(s, cb->cb_arg); 548 /* 549 * Do deferred operations. 550 */ 551 if (clearaddr) { 552 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) { 553 warnx("interface %s cannot change %s addresses!", 554 name, afp->af_name); 555 clearaddr = 0; 556 } 557 } 558 if (clearaddr) { 559 int ret; 560 strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name); 561 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq); 562 if (ret < 0) { 563 if (errno == EADDRNOTAVAIL && (doalias >= 0)) { 564 /* means no previous address for interface */ 565 } else 566 Perror("ioctl (SIOCDIFADDR)"); 567 } 568 } 569 if (newaddr) { 570 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) { 571 warnx("interface %s cannot change %s addresses!", 572 name, afp->af_name); 573 newaddr = 0; 574 } 575 } 576 if (newaddr && (setaddr || setmask)) { 577 strncpy(afp->af_addreq, name, sizeof ifr.ifr_name); 578 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0) 579 Perror("ioctl (SIOCAIFADDR)"); 580 } 581 582 close(s); 583 return(0); 584 } 585 586 /*ARGSUSED*/ 587 static void 588 setifaddr(const char *addr, int param, int s, const struct afswtch *afp) 589 { 590 if (afp->af_getaddr == NULL) 591 return; 592 /* 593 * Delay the ioctl to set the interface addr until flags are all set. 594 * The address interpretation may depend on the flags, 595 * and the flags may change when the address is set. 596 */ 597 setaddr++; 598 if (doalias == 0 && afp->af_af != AF_LINK) 599 clearaddr = 1; 600 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); 601 } 602 603 static void 604 settunnel(const char *src, const char *dst, int s, const struct afswtch *afp) 605 { 606 struct addrinfo *srcres, *dstres; 607 int ecode; 608 609 if (afp->af_settunnel == NULL) { 610 warn("address family %s does not support tunnel setup", 611 afp->af_name); 612 return; 613 } 614 615 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) 616 errx(1, "error in parsing address string: %s", 617 gai_strerror(ecode)); 618 619 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) 620 errx(1, "error in parsing address string: %s", 621 gai_strerror(ecode)); 622 623 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 624 errx(1, 625 "source and destination address families do not match"); 626 627 afp->af_settunnel(s, srcres, dstres); 628 629 freeaddrinfo(srcres); 630 freeaddrinfo(dstres); 631 } 632 633 /* ARGSUSED */ 634 static void 635 deletetunnel(const char *vname, int param, int s, const struct afswtch *afp) 636 { 637 638 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0) 639 err(1, "SIOCDIFPHYADDR"); 640 } 641 642 static void 643 setifnetmask(const char *addr, int dummy __unused, int s, 644 const struct afswtch *afp) 645 { 646 if (afp->af_getaddr != NULL) { 647 setmask++; 648 afp->af_getaddr(addr, MASK); 649 } 650 } 651 652 static void 653 setifbroadaddr(const char *addr, int dummy __unused, int s, 654 const struct afswtch *afp) 655 { 656 if (afp->af_getaddr != NULL) 657 afp->af_getaddr(addr, DSTADDR); 658 } 659 660 static void 661 setifipdst(const char *addr, int dummy __unused, int s, 662 const struct afswtch *afp) 663 { 664 const struct afswtch *inet; 665 666 inet = af_getbyname("inet"); 667 if (inet == NULL) 668 return; 669 inet->af_getaddr(addr, DSTADDR); 670 setipdst++; 671 clearaddr = 0; 672 newaddr = 0; 673 } 674 675 static void 676 notealias(const char *addr, int param, int s, const struct afswtch *afp) 677 { 678 #define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr)) 679 if (setaddr && doalias == 0 && param < 0) 680 if (afp->af_addreq != NULL && afp->af_ridreq != NULL) 681 bcopy((caddr_t)rqtosa(af_addreq), 682 (caddr_t)rqtosa(af_ridreq), 683 rqtosa(af_addreq)->sa_len); 684 doalias = param; 685 if (param < 0) { 686 clearaddr = 1; 687 newaddr = 0; 688 } else 689 clearaddr = 0; 690 #undef rqtosa 691 } 692 693 /*ARGSUSED*/ 694 static void 695 setifdstaddr(const char *addr, int param __unused, int s, 696 const struct afswtch *afp) 697 { 698 if (afp->af_getaddr != NULL) 699 afp->af_getaddr(addr, DSTADDR); 700 } 701 702 /* 703 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion 704 * of the ifreq structure, which may confuse other parts of ifconfig. 705 * Make a private copy so we can avoid that. 706 */ 707 static void 708 setifflags(const char *vname, int value, int s, const struct afswtch *afp) 709 { 710 struct ifreq my_ifr; 711 712 bcopy((char *)&ifr, (char *)&my_ifr, sizeof(struct ifreq)); 713 714 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) { 715 Perror("ioctl (SIOCGIFFLAGS)"); 716 exit(1); 717 } 718 strncpy(my_ifr.ifr_name, name, sizeof (my_ifr.ifr_name)); 719 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16); 720 721 if (value < 0) { 722 value = -value; 723 flags &= ~value; 724 } else 725 flags |= value; 726 my_ifr.ifr_flags = flags & 0xffff; 727 my_ifr.ifr_flagshigh = flags >> 16; 728 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0) 729 Perror(vname); 730 } 731 732 void 733 setifcap(const char *vname, int value, int s, const struct afswtch *afp) 734 { 735 736 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) { 737 Perror("ioctl (SIOCGIFCAP)"); 738 exit(1); 739 } 740 flags = ifr.ifr_curcap; 741 if (value < 0) { 742 value = -value; 743 flags &= ~value; 744 } else 745 flags |= value; 746 ifr.ifr_reqcap = flags; 747 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0) 748 Perror(vname); 749 } 750 751 static void 752 setifmetric(const char *val, int dummy __unused, int s, 753 const struct afswtch *afp) 754 { 755 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 756 ifr.ifr_metric = atoi(val); 757 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0) 758 warn("ioctl (set metric)"); 759 } 760 761 static void 762 setifmtu(const char *val, int dummy __unused, int s, 763 const struct afswtch *afp) 764 { 765 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 766 ifr.ifr_mtu = atoi(val); 767 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0) 768 warn("ioctl (set mtu)"); 769 } 770 771 static void 772 setifname(const char *val, int dummy __unused, int s, 773 const struct afswtch *afp) 774 { 775 char *newname; 776 777 newname = strdup(val); 778 if (newname == NULL) { 779 warn("no memory to set ifname"); 780 return; 781 } 782 ifr.ifr_data = newname; 783 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 784 warn("ioctl (set name)"); 785 free(newname); 786 return; 787 } 788 strlcpy(name, newname, sizeof(name)); 789 free(newname); 790 791 /* 792 * Even if we just created the interface, we don't need to print 793 * its name because we just nailed it down separately. 794 */ 795 printname = 0; 796 } 797 798 /* 799 * Expand the compacted form of addresses as returned via the 800 * configuration read via sysctl(). 801 */ 802 static void 803 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) 804 { 805 struct sockaddr *sa; 806 int i; 807 808 memset(rtinfo->rti_info, 0, sizeof(rtinfo->rti_info)); 809 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 810 if ((rtinfo->rti_addrs & (1 << i)) == 0) 811 continue; 812 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 813 cp += SA_SIZE(sa); 814 } 815 } 816 817 #define IFFBITS \ 818 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \ 819 "\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ 820 "\20MULTICAST\21POLLING\22PPROMISC\23MONITOR\24STATICARP\25NEEDSGIANT" 821 822 #define IFCAPBITS \ 823 "\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" 824 825 /* 826 * Print the status of the interface. If an address family was 827 * specified, show only it; otherwise, show them all. 828 */ 829 static void 830 status(const struct afswtch *afp, int addrcount, struct sockaddr_dl *sdl, 831 struct if_msghdr *ifm, struct ifa_msghdr *ifam) 832 { 833 struct rt_addrinfo info; 834 int allfamilies, s; 835 struct ifstat ifs; 836 837 if (afp == NULL) { 838 allfamilies = 1; 839 afp = af_getbyname("inet"); 840 } else 841 allfamilies = 0; 842 843 ifr.ifr_addr.sa_family = afp->af_af == AF_LINK ? AF_INET : afp->af_af; 844 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 845 846 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0); 847 if (s < 0) 848 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 849 850 printf("%s: ", name); 851 printb("flags", flags, IFFBITS); 852 if (ifm->ifm_data.ifi_metric) 853 printf(" metric %ld", ifm->ifm_data.ifi_metric); 854 if (ifm->ifm_data.ifi_mtu) 855 printf(" mtu %ld", ifm->ifm_data.ifi_mtu); 856 putchar('\n'); 857 858 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) { 859 if (ifr.ifr_curcap != 0) { 860 printb("\toptions", ifr.ifr_curcap, IFCAPBITS); 861 putchar('\n'); 862 } 863 if (supmedia && ifr.ifr_reqcap != 0) { 864 printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS); 865 putchar('\n'); 866 } 867 } 868 869 tunnel_status(s); 870 871 while (addrcount > 0) { 872 info.rti_addrs = ifam->ifam_addrs; 873 /* Expand the compacted addresses */ 874 rt_xaddrs((char *)(ifam + 1), ifam->ifam_msglen + (char *)ifam, 875 &info); 876 877 if (allfamilies) { 878 const struct afswtch *p; 879 p = af_getbyfamily(info.rti_info[RTAX_IFA]->sa_family); 880 if (p != NULL && p->af_status != NULL) 881 p->af_status(s, &info); 882 } else if (afp->af_af == info.rti_info[RTAX_IFA]->sa_family) 883 afp->af_status(s, &info); 884 addrcount--; 885 ifam = (struct ifa_msghdr *)((char *)ifam + ifam->ifam_msglen); 886 } 887 if (allfamilies || afp->af_af == AF_LINK) { 888 const struct afswtch *lafp; 889 890 /* 891 * Hack; the link level address is received separately 892 * from the routing information so any address is not 893 * handled above. Cobble together an entry and invoke 894 * the status method specially. 895 */ 896 lafp = af_getbyname("lladdr"); 897 if (lafp != NULL) { 898 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; 899 lafp->af_status(s, &info); 900 } 901 } 902 if (allfamilies) 903 af_other_status(s); 904 else if (afp->af_other_status != NULL) 905 afp->af_other_status(s); 906 907 strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name); 908 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0) 909 printf("%s", ifs.ascii); 910 911 close(s); 912 return; 913 } 914 915 static void 916 tunnel_status(int s) 917 { 918 af_all_tunnel_status(s); 919 } 920 921 void 922 Perror(const char *cmd) 923 { 924 switch (errno) { 925 926 case ENXIO: 927 errx(1, "%s: no such interface", cmd); 928 break; 929 930 case EPERM: 931 errx(1, "%s: permission denied", cmd); 932 break; 933 934 default: 935 err(1, "%s", cmd); 936 } 937 } 938 939 /* 940 * Print a value a la the %b format of the kernel's printf 941 */ 942 void 943 printb(const char *s, unsigned v, const char *bits) 944 { 945 int i, any = 0; 946 char c; 947 948 if (bits && *bits == 8) 949 printf("%s=%o", s, v); 950 else 951 printf("%s=%x", s, v); 952 bits++; 953 if (bits) { 954 putchar('<'); 955 while ((i = *bits++) != '\0') { 956 if (v & (1 << (i-1))) { 957 if (any) 958 putchar(','); 959 any = 1; 960 for (; (c = *bits) > 32; bits++) 961 putchar(c); 962 } else 963 for (; *bits > 32; bits++) 964 ; 965 } 966 putchar('>'); 967 } 968 } 969 970 void 971 ifmaybeload(char *name) 972 { 973 struct module_stat mstat; 974 int fileid, modid; 975 char ifkind[35], *cp, *dp; 976 977 /* turn interface and unit into module name */ 978 strcpy(ifkind, "if_"); 979 for (cp = name, dp = ifkind + 3; 980 (*cp != 0) && !isdigit(*cp); cp++, dp++) 981 *dp = *cp; 982 *dp = 0; 983 984 /* scan files in kernel */ 985 mstat.version = sizeof(struct module_stat); 986 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { 987 /* scan modules in file */ 988 for (modid = kldfirstmod(fileid); modid > 0; 989 modid = modfnext(modid)) { 990 if (modstat(modid, &mstat) < 0) 991 continue; 992 /* strip bus name if present */ 993 if ((cp = strchr(mstat.name, '/')) != NULL) { 994 cp++; 995 } else { 996 cp = mstat.name; 997 } 998 /* already loaded? */ 999 if (strncmp(name, cp, strlen(cp)) == 0 || 1000 strncmp(ifkind, cp, strlen(cp)) == 0) 1001 return; 1002 } 1003 } 1004 1005 /* not present, we should try to load it */ 1006 kldload(ifkind); 1007 } 1008 1009 static struct cmd basic_cmds[] = { 1010 DEF_CMD("up", IFF_UP, setifflags), 1011 DEF_CMD("down", -IFF_UP, setifflags), 1012 DEF_CMD("arp", -IFF_NOARP, setifflags), 1013 DEF_CMD("-arp", IFF_NOARP, setifflags), 1014 DEF_CMD("debug", IFF_DEBUG, setifflags), 1015 DEF_CMD("-debug", -IFF_DEBUG, setifflags), 1016 DEF_CMD("promisc", IFF_PPROMISC, setifflags), 1017 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags), 1018 DEF_CMD("add", IFF_UP, notealias), 1019 DEF_CMD("alias", IFF_UP, notealias), 1020 DEF_CMD("-alias", -IFF_UP, notealias), 1021 DEF_CMD("delete", -IFF_UP, notealias), 1022 DEF_CMD("remove", -IFF_UP, notealias), 1023 #ifdef notdef 1024 #define EN_SWABIPS 0x1000 1025 DEF_CMD("swabips", EN_SWABIPS, setifflags), 1026 DEF_CMD("-swabips", -EN_SWABIPS, setifflags), 1027 #endif 1028 DEF_CMD_ARG("netmask", setifnetmask), 1029 DEF_CMD_ARG("metric", setifmetric), 1030 DEF_CMD_ARG("broadcast", setifbroadaddr), 1031 #ifndef NO_IPX 1032 DEF_CMD_ARG("ipdst", setifipdst), 1033 #endif 1034 DEF_CMD_ARG2("tunnel", settunnel), 1035 DEF_CMD("-tunnel", 0, deletetunnel), 1036 DEF_CMD("deletetunnel", 0, deletetunnel), 1037 DEF_CMD("link0", IFF_LINK0, setifflags), 1038 DEF_CMD("-link0", -IFF_LINK0, setifflags), 1039 DEF_CMD("link1", IFF_LINK1, setifflags), 1040 DEF_CMD("-link1", -IFF_LINK1, setifflags), 1041 DEF_CMD("link2", IFF_LINK2, setifflags), 1042 DEF_CMD("-link2", -IFF_LINK2, setifflags), 1043 #ifdef notyet 1044 DEF_CMD("monitor", IFF_MONITOR, setifflags), 1045 DEF_CMD("-monitor", -IFF_MONITOR, setifflags), 1046 DEF_CMD("staticarp", IFF_STATICARP, setifflags), 1047 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), 1048 #endif 1049 DEF_CMD("polling", IFF_POLLING, setifflags), 1050 DEF_CMD("-polling", -IFF_POLLING, setifflags), 1051 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), 1052 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), 1053 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), 1054 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), 1055 DEF_CMD("netcons", IFCAP_NETCONS, setifcap), 1056 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), 1057 DEF_CMD("normal", -IFF_LINK0, setifflags), 1058 DEF_CMD("compress", IFF_LINK0, setifflags), 1059 DEF_CMD("noicmp", IFF_LINK1, setifflags), 1060 DEF_CMD_ARG("mtu", setifmtu), 1061 DEF_CMD_ARG("name", setifname), 1062 }; 1063 1064 static __constructor void 1065 ifconfig_ctor(void) 1066 { 1067 #define N(a) (sizeof(a) / sizeof(a[0])) 1068 int i; 1069 1070 for (i = 0; i < N(basic_cmds); i++) 1071 cmd_register(&basic_cmds[i]); 1072 #undef N 1073 } 1074