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 * 3. 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 */ 31 32 #include <sys/param.h> 33 #include <sys/ioctl.h> 34 #include <sys/socket.h> 35 #include <sys/sysctl.h> 36 #include <sys/time.h> 37 #include <sys/module.h> 38 #include <sys/linker.h> 39 #include <sys/cdefs.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 * Since "struct ifreq" is composed of various union members, callers 67 * should pay special attention to interpret the value. 68 * (.e.g. little/big endian difference in the structure.) 69 */ 70 struct ifreq ifr; 71 72 char name[IFNAMSIZ]; 73 int flags; 74 int setaddr; 75 int setmask; 76 int doalias; 77 int clearaddr; 78 int newaddr = 1; 79 int verbose; 80 int noload; 81 82 int supmedia = 0; 83 int printkeys = 0; /* Print keying material for interfaces. */ 84 int printifname = 0; /* Print the name of the created interface. */ 85 86 static int ifconfig(int argc, char *const *argv, int iscreate, 87 const struct afswtch *afp); 88 static void status(const struct afswtch *afp, int addrcount, 89 struct sockaddr_dl *sdl, struct if_msghdr *ifm, 90 struct ifa_msghdr *ifam); 91 static void tunnel_status(int s); 92 static void usage(void) __dead2; 93 94 static struct afswtch *af_getbyname(const char *name); 95 static struct afswtch *af_getbyfamily(int af); 96 static void af_other_status(int); 97 static void printifnamemaybe(void); 98 99 static struct option *opts = NULL; 100 101 void 102 opt_register(struct option *p) 103 { 104 p->next = opts; 105 opts = p; 106 } 107 108 static void 109 usage(void) 110 { 111 char options[1024]; 112 struct option *p; 113 114 /* XXX not right but close enough for now */ 115 options[0] = '\0'; 116 for (p = opts; p != NULL; p = p->next) { 117 strlcat(options, p->opt_usage, sizeof(options)); 118 strlcat(options, " ", sizeof(options)); 119 } 120 121 fprintf(stderr, 122 "usage: ifconfig %s[-n] interface address_family [address [dest_address]]\n" 123 " [parameters]\n" 124 " ifconfig [-n] interface create\n" 125 " ifconfig [-n] interface destroy\n" 126 " ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n" 127 " ifconfig -l [-d] [-u] [address_family]\n" 128 " ifconfig %s[-d] [-m] [-u] [-v]\n", 129 options, options, options); 130 exit(1); 131 } 132 133 static void printifnamemaybe(void) 134 { 135 if (printifname) 136 printf("%s\n", name); 137 } 138 139 int 140 main(int argc, char *argv[]) 141 { 142 int c, all, namesonly, downonly, uponly; 143 int need_nl = 0, count = 0; 144 const struct afswtch *afp = NULL; 145 int addrcount, ifindex; 146 struct if_msghdr *ifm, *nextifm; 147 struct ifa_msghdr *ifam; 148 struct sockaddr_dl *sdl; 149 char *buf, *lim, *next; 150 size_t needed; 151 int mib[6]; 152 char options[1024]; 153 const char *ifname; 154 struct option *p; 155 size_t iflen; 156 157 all = downonly = uponly = namesonly = verbose = noload = 0; 158 159 /* 160 * Ensure we print interface name when expected to, 161 * even if we terminate early due to error. 162 */ 163 atexit(printifnamemaybe); 164 165 /* Parse leading line options */ 166 strlcpy(options, "adklmnuv", sizeof(options)); 167 for (p = opts; p != NULL; p = p->next) 168 strlcat(options, p->opt, sizeof(options)); 169 while ((c = getopt(argc, argv, options)) != -1) { 170 switch (c) { 171 case 'a': /* scan all interfaces */ 172 all++; 173 break; 174 case 'd': /* restrict scan to "down" interfaces */ 175 downonly++; 176 break; 177 case 'k': 178 printkeys++; 179 break; 180 case 'l': /* scan interface names only */ 181 namesonly++; 182 break; 183 case 'm': /* show media choices in status */ 184 supmedia = 1; 185 break; 186 case 'n': /* suppress module loading */ 187 noload++; 188 break; 189 case 'u': /* restrict scan to "up" interfaces */ 190 uponly++; 191 break; 192 case 'v': 193 verbose++; 194 break; 195 default: 196 for (p = opts; p != NULL; p = p->next) 197 if (p->opt[0] == c) { 198 p->cb(optarg); 199 break; 200 } 201 if (p == NULL) 202 usage(); 203 break; 204 } 205 } 206 argc -= optind; 207 argv += optind; 208 209 /* -l cannot be used with -a or -m */ 210 if (namesonly && (all || supmedia)) 211 usage(); 212 213 /* nonsense.. */ 214 if (uponly && downonly) 215 usage(); 216 217 /* no arguments is equivalent to '-a' */ 218 if (!namesonly && argc < 1) 219 all = 1; 220 221 /* -a and -l allow an address family arg to limit the output */ 222 if (all || namesonly) { 223 if (argc > 1) 224 usage(); 225 226 ifname = NULL; 227 ifindex = 0; 228 if (argc == 1) { 229 afp = af_getbyname(*argv); 230 if (afp == NULL) 231 usage(); 232 if (afp->af_name != NULL) 233 argc--, argv++; 234 /* leave with afp non-zero */ 235 } 236 } else { 237 /* not listing, need an argument */ 238 if (argc < 1) 239 usage(); 240 241 ifname = *argv; 242 argc--, argv++; 243 244 /* check and maybe load support for this interface */ 245 ifmaybeload(ifname); 246 247 ifindex = if_nametoindex(ifname); 248 if (ifindex == 0) { 249 /* 250 * NOTE: We must special-case the `create' command 251 * right here as we would otherwise fail when trying 252 * to find the interface. 253 */ 254 if (argc > 0 && (strcmp(argv[0], "create") == 0 || 255 strcmp(argv[0], "plumb") == 0)) { 256 iflen = strlcpy(name, ifname, sizeof(name)); 257 if (iflen >= sizeof(name)) 258 errx(1, "%s: cloning name too long", 259 ifname); 260 ifconfig(argc, argv, 1, NULL); 261 return (0); 262 } 263 errx(1, "interface %s does not exist", ifname); 264 } 265 } 266 267 /* Check for address family */ 268 if (argc > 0) { 269 afp = af_getbyname(*argv); 270 if (afp != NULL) 271 argc--, argv++; 272 } 273 274 retry: 275 mib[0] = CTL_NET; 276 mib[1] = PF_ROUTE; 277 mib[2] = 0; 278 mib[3] = 0; /* address family */ 279 mib[4] = NET_RT_IFLIST; 280 mib[5] = ifindex; /* interface index */ 281 282 /* if particular family specified, only ask about it */ 283 if (afp != NULL) 284 mib[3] = afp->af_af; 285 286 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 287 errx(1, "iflist-sysctl-estimate"); 288 if ((buf = malloc(needed)) == NULL) 289 errx(1, "malloc"); 290 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 291 if (errno == ENOMEM && count++ < 10) { 292 warnx("Routing table grew, retrying"); 293 free(buf); 294 sleep(1); 295 goto retry; 296 } 297 errx(1, "actual retrieval of interface table"); 298 } 299 lim = buf + needed; 300 301 next = buf; 302 while (next < lim) { 303 int name_len; 304 305 ifm = (struct if_msghdr *)next; 306 307 if (ifm->ifm_type == RTM_IFINFO) { 308 #ifdef notyet 309 if (ifm->ifm_data.ifi_datalen == 0) 310 ifm->ifm_data.ifi_datalen = sizeof(struct if_data); 311 sdl = (struct sockaddr_dl *)((char *)ifm + sizeof(struct if_msghdr) - 312 sizeof(struct if_data) + ifm->ifm_data.ifi_datalen); 313 #else 314 sdl = (struct sockaddr_dl *)(ifm + 1); 315 #endif 316 flags = ifm->ifm_flags; 317 } else { 318 fprintf(stderr, "out of sync parsing NET_RT_IFLIST\n"); 319 fprintf(stderr, "expected %d, got %d\n", RTM_IFINFO, 320 ifm->ifm_type); 321 fprintf(stderr, "msglen = %d\n", ifm->ifm_msglen); 322 fprintf(stderr, "buf:%p, next:%p, lim:%p\n", buf, next, 323 lim); 324 exit(1); 325 } 326 327 next += ifm->ifm_msglen; 328 ifam = NULL; 329 addrcount = 0; 330 while (next < lim) { 331 nextifm = (struct if_msghdr *)next; 332 333 if (nextifm->ifm_type != RTM_NEWADDR) 334 break; 335 336 if (ifam == NULL) 337 ifam = (struct ifa_msghdr *)nextifm; 338 339 addrcount++; 340 next += nextifm->ifm_msglen; 341 } 342 343 if (sizeof(name) <= sdl->sdl_nlen) 344 name_len = sizeof(name) - 1; 345 else 346 name_len = sdl->sdl_nlen; 347 348 memcpy(name, sdl->sdl_data, name_len); 349 name[name_len] = '\0'; 350 351 if (all || namesonly) { 352 if (uponly) 353 if ((flags & IFF_UP) == 0) 354 continue; /* not up */ 355 if (downonly) 356 if (flags & IFF_UP) 357 continue; /* not down */ 358 if (namesonly) { 359 if (afp == NULL || afp->af_af != AF_LINK || 360 sdl->sdl_type == IFT_ETHER) { 361 if (need_nl) 362 putchar(' '); 363 fputs(name, stdout); 364 need_nl++; 365 } 366 continue; 367 } 368 } 369 370 if (argc > 0) 371 ifconfig(argc, argv, 0, afp); 372 else 373 status(afp, addrcount, sdl, ifm, ifam); 374 } 375 free(buf); 376 377 if (namesonly && need_nl > 0) 378 putchar('\n'); 379 380 return (0); 381 } 382 383 static struct afswtch *afs = NULL; 384 385 void 386 af_register(struct afswtch *p) 387 { 388 p->af_next = afs; 389 afs = p; 390 } 391 392 static struct afswtch * 393 af_getbyname(const char *name) 394 { 395 struct afswtch *afp; 396 397 for (afp = afs; afp != NULL; afp = afp->af_next) 398 if (strcmp(afp->af_name, name) == 0) 399 return afp; 400 return NULL; 401 } 402 403 static struct afswtch * 404 af_getbyfamily(int af) 405 { 406 struct afswtch *afp; 407 408 for (afp = afs; afp != NULL; afp = afp->af_next) 409 if (afp->af_af == af) 410 return afp; 411 return NULL; 412 } 413 414 static void 415 af_other_status(int s) 416 { 417 struct afswtch *afp; 418 uint8_t afmask[howmany(AF_MAX, NBBY)]; 419 420 memset(afmask, 0, sizeof(afmask)); 421 for (afp = afs; afp != NULL; afp = afp->af_next) { 422 if (afp->af_other_status == NULL) 423 continue; 424 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 425 continue; 426 afp->af_other_status(s); 427 setbit(afmask, afp->af_af); 428 } 429 } 430 431 static void 432 af_all_tunnel_status(int s) 433 { 434 struct afswtch *afp; 435 uint8_t afmask[howmany(AF_MAX, NBBY)]; 436 437 memset(afmask, 0, sizeof(afmask)); 438 for (afp = afs; afp != NULL; afp = afp->af_next) { 439 if (afp->af_status_tunnel == NULL) 440 continue; 441 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 442 continue; 443 afp->af_status_tunnel(s); 444 setbit(afmask, afp->af_af); 445 } 446 } 447 448 static struct cmd *cmds = NULL; 449 450 void 451 cmd_register(struct cmd *p) 452 { 453 p->c_next = cmds; 454 cmds = p; 455 } 456 457 static const struct cmd * 458 cmd_lookup(const char *name, int iscreate) 459 { 460 const struct cmd *p; 461 462 for (p = cmds; p != NULL; p = p->c_next) 463 if (strcmp(name, p->c_name) == 0) { 464 if (iscreate) { 465 if (p->c_iscloneop) 466 return p; 467 } else { 468 if (!p->c_iscloneop) 469 return p; 470 } 471 } 472 return NULL; 473 } 474 475 struct callback { 476 callback_func *cb_func; 477 void *cb_arg; 478 struct callback *cb_next; 479 }; 480 static struct callback *callbacks = NULL; 481 482 void 483 callback_register(callback_func *func, void *arg) 484 { 485 struct callback *cb; 486 487 cb = malloc(sizeof(struct callback)); 488 if (cb == NULL) 489 errx(1, "unable to allocate memory for callback"); 490 cb->cb_func = func; 491 cb->cb_arg = arg; 492 cb->cb_next = callbacks; 493 callbacks = cb; 494 } 495 496 /* specially-handled commands */ 497 static void setifaddr(const char *, int, int, const struct afswtch *); 498 static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr); 499 500 static void setifdstaddr(const char *, int, int, const struct afswtch *); 501 static const struct cmd setifdstaddr_cmd = 502 DEF_CMD("ifdstaddr", 0, setifdstaddr); 503 504 static int 505 ifconfig(int argc, char *const *argv, int iscreate, 506 const struct afswtch *uafp) 507 { 508 const struct afswtch *afp, *nafp; 509 struct callback *cb; 510 int s; 511 512 strlcpy(ifr.ifr_name, name, sizeof ifr.ifr_name); 513 afp = uafp != NULL ? uafp : af_getbyname("inet"); 514 top: 515 ifr.ifr_addr.sa_family = 516 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ? 517 AF_LOCAL : afp->af_af; 518 519 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 && 520 (uafp != NULL || errno != EAFNOSUPPORT || 521 (s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0)) 522 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 523 524 while (argc > 0) { 525 const struct cmd *p; 526 527 p = cmd_lookup(*argv, iscreate); 528 529 if (iscreate && p == NULL) { 530 /* 531 * Push the clone create callback so the new 532 * device is created and can be used for any 533 * remaining arguments. 534 */ 535 cb = callbacks; 536 if (cb == NULL) 537 errx(1, "internal error, no callback"); 538 callbacks = cb->cb_next; 539 cb->cb_func(s, cb->cb_arg); 540 iscreate = 0; 541 542 /* 543 * After cloning, make sure we have an up-to-date name 544 * in ifr_name. 545 */ 546 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 547 548 /* 549 * Handle any address family spec that 550 * immediately follows and potentially 551 * recreate the socket. 552 */ 553 nafp = af_getbyname(*argv); 554 if (nafp != NULL) { 555 argc--, argv++; 556 if (nafp != afp) { 557 close(s); 558 afp = nafp; 559 goto top; 560 } 561 } 562 /* 563 * Look for a normal parameter. 564 */ 565 continue; 566 } 567 if (p == NULL) { 568 /* 569 * Not a recognized command, choose between setting 570 * the interface address and the dst address. 571 */ 572 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd); 573 } 574 if (p->c_u.c_func || p->c_u.c_func2) { 575 if (p->c_parameter == NEXTARG) { 576 if (argv[1] == NULL) 577 errx(1, "'%s' requires argument", 578 p->c_name); 579 p->c_u.c_func(argv[1], 0, s, afp); 580 argc--, argv++; 581 } else if (p->c_parameter == OPTARG) { 582 p->c_u.c_func(argv[1], 0, s, afp); 583 if (argv[1] != NULL) 584 argc--, argv++; 585 } else if (p->c_parameter == NEXTARG2) { 586 if (argc < 3) 587 errx(1, "'%s' requires 2 arguments", 588 p->c_name); 589 p->c_u.c_func2(argv[1], argv[2], s, afp); 590 argc -= 2, argv += 2; 591 } else 592 p->c_u.c_func(*argv, p->c_parameter, s, afp); 593 } 594 argc--, argv++; 595 } 596 597 /* 598 * Do any post argument processing required by the address family. 599 */ 600 if (afp->af_postproc != NULL) 601 afp->af_postproc(s, afp); 602 /* 603 * Do deferred callbacks registered while processing 604 * command-line arguments. 605 */ 606 for (cb = callbacks; cb != NULL; cb = cb->cb_next) 607 cb->cb_func(s, cb->cb_arg); 608 /* 609 * Do deferred operations. 610 */ 611 if (clearaddr) { 612 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) { 613 warnx("interface %s cannot change %s addresses!", 614 name, afp->af_name); 615 clearaddr = 0; 616 } 617 } 618 if (clearaddr) { 619 int ret; 620 strlcpy(afp->af_ridreq, name, sizeof ifr.ifr_name); 621 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq); 622 if (ret < 0) { 623 if (errno == EADDRNOTAVAIL && (doalias >= 0)) { 624 /* means no previous address for interface */ 625 } else 626 Perror("ioctl (SIOCDIFADDR)"); 627 } 628 } 629 if (newaddr) { 630 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) { 631 warnx("interface %s cannot change %s addresses!", 632 name, afp->af_name); 633 newaddr = 0; 634 } 635 } 636 if (newaddr && (setaddr || setmask)) { 637 strlcpy(afp->af_addreq, name, sizeof ifr.ifr_name); 638 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0) 639 Perror("ioctl (SIOCAIFADDR)"); 640 } 641 642 close(s); 643 return (0); 644 } 645 646 /*ARGSUSED*/ 647 static void 648 setifaddr(const char *addr, int param, int s, const struct afswtch *afp) 649 { 650 if (afp->af_getaddr == NULL) 651 return; 652 /* 653 * Delay the ioctl to set the interface addr until flags are all set. 654 * The address interpretation may depend on the flags, 655 * and the flags may change when the address is set. 656 */ 657 setaddr++; 658 if (doalias == 0 && afp->af_af != AF_LINK) 659 clearaddr = 1; 660 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); 661 } 662 663 static void 664 settunnel(const char *src, const char *dst, int s, const struct afswtch *afp) 665 { 666 struct addrinfo *srcres, *dstres; 667 int ecode; 668 669 if (afp->af_settunnel == NULL) { 670 warn("address family %s does not support tunnel setup", 671 afp->af_name); 672 return; 673 } 674 675 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) 676 errx(1, "error in parsing address string: %s", 677 gai_strerror(ecode)); 678 679 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) 680 errx(1, "error in parsing address string: %s", 681 gai_strerror(ecode)); 682 683 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 684 errx(1, 685 "source and destination address families do not match"); 686 687 afp->af_settunnel(s, srcres, dstres); 688 689 freeaddrinfo(srcres); 690 freeaddrinfo(dstres); 691 } 692 693 /* ARGSUSED */ 694 static void 695 deletetunnel(const char *vname, int param, int s, const struct afswtch *afp) 696 { 697 698 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0) 699 err(1, "SIOCDIFPHYADDR"); 700 } 701 702 static void 703 setifnetmask(const char *addr, int dummy __unused, int s, 704 const struct afswtch *afp) 705 { 706 if (afp->af_getaddr != NULL) { 707 setmask++; 708 afp->af_getaddr(addr, MASK); 709 } 710 } 711 712 static void 713 setifbroadaddr(const char *addr, int dummy __unused, int s, 714 const struct afswtch *afp) 715 { 716 if (afp->af_getaddr != NULL) 717 afp->af_getaddr(addr, DSTADDR); 718 } 719 720 static void 721 notealias(const char *addr, int param, int s, const struct afswtch *afp) 722 { 723 #define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr)) 724 if (setaddr && doalias == 0 && param < 0) 725 if (afp->af_addreq != NULL && afp->af_ridreq != NULL) 726 bcopy((caddr_t)rqtosa(af_addreq), 727 (caddr_t)rqtosa(af_ridreq), 728 rqtosa(af_addreq)->sa_len); 729 doalias = param; 730 if (param < 0) { 731 clearaddr = 1; 732 newaddr = 0; 733 } else 734 clearaddr = 0; 735 #undef rqtosa 736 } 737 738 /*ARGSUSED*/ 739 static void 740 setifdstaddr(const char *addr, int param __unused, int s, 741 const struct afswtch *afp) 742 { 743 if (afp->af_getaddr != NULL) 744 afp->af_getaddr(addr, DSTADDR); 745 } 746 747 /* 748 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion 749 * of the ifreq structure, which may confuse other parts of ifconfig. 750 * Make a private copy so we can avoid that. 751 */ 752 static void 753 setifflags(const char *vname, int value, int s, const struct afswtch *afp) 754 { 755 struct ifreq my_ifr; 756 757 bcopy((char *)&ifr, (char *)&my_ifr, sizeof(struct ifreq)); 758 759 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) { 760 Perror("ioctl (SIOCGIFFLAGS)"); 761 } 762 strlcpy(my_ifr.ifr_name, name, sizeof (my_ifr.ifr_name)); 763 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16); 764 765 if (value < 0) { 766 value = -value; 767 flags &= ~value; 768 } else 769 flags |= value; 770 my_ifr.ifr_flags = flags & 0xffff; 771 my_ifr.ifr_flagshigh = flags >> 16; 772 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0) 773 Perror(vname); 774 } 775 776 void 777 setifcap(const char *vname, int value, int s, const struct afswtch *afp) 778 { 779 780 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) { 781 Perror("ioctl (SIOCGIFCAP)"); 782 } 783 flags = ifr.ifr_curcap; 784 if (value < 0) { 785 value = -value; 786 flags &= ~value; 787 } else 788 flags |= value; 789 ifr.ifr_reqcap = flags; 790 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0) 791 Perror(vname); 792 } 793 794 static void 795 setifmetric(const char *val, int dummy __unused, int s, 796 const struct afswtch *afp) 797 { 798 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 799 ifr.ifr_metric = atoi(val); 800 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0) 801 err(1, "ioctl SIOCSIFMETRIC (set metric)"); 802 } 803 804 static void 805 setifmtu(const char *val, int dummy __unused, int s, 806 const struct afswtch *afp) 807 { 808 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 809 ifr.ifr_mtu = atoi(val); 810 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0) 811 err(1, "ioctl SIOCSIFMTU (set mtu)"); 812 } 813 814 static void 815 setiftsolen(const char *val, int dummy __unused, int s, 816 const struct afswtch *afp) 817 { 818 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 819 ifr.ifr_tsolen = atoi(val); 820 if (ioctl(s, SIOCSIFTSOLEN, (caddr_t)&ifr) < 0) 821 err(1, "ioctl SIOCSIFTSOLEN (set tsolen)"); 822 } 823 824 static void 825 setifname(const char *val, int dummy __unused, int s, 826 const struct afswtch *afp) 827 { 828 char *newname; 829 830 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 831 832 newname = strdup(val); 833 if (newname == NULL) 834 err(1, "no memory to set ifname"); 835 ifr.ifr_data = newname; 836 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 837 free(newname); 838 err(1, "ioctl SIOCSIFNAME (set name)"); 839 } 840 printifname = 1; 841 strlcpy(name, newname, sizeof(name)); 842 free(newname); 843 } 844 845 static void 846 setifpollcpu(const char *val, int dummy __unused, int s, 847 const struct afswtch *afp) 848 { 849 warnx("pollcpu is deprecated, use polling or npolling instead"); 850 setifflags("npolling", IFF_NPOLLING, s, afp); 851 } 852 853 /* 854 * Expand the compacted form of addresses as returned via the 855 * configuration read via sysctl(). 856 */ 857 static void 858 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) 859 { 860 struct sockaddr *sa; 861 int i; 862 863 memset(rtinfo->rti_info, 0, sizeof(rtinfo->rti_info)); 864 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 865 if ((rtinfo->rti_addrs & (1 << i)) == 0) 866 continue; 867 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 868 RT_ADVANCE(cp, sa); 869 } 870 } 871 872 #define IFFBITS \ 873 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \ 874 "\10NOARP\11PROMISC\12ALLMULTI\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ 875 "\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP\25NPOLLING\26IDIRECT" 876 877 #define IFCAPBITS \ 878 "\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7RSS" \ 879 "\10VLAN_HWCSUM\11TSO" 880 881 /* 882 * Print the status of the interface. If an address family was 883 * specified, show only it; otherwise, show them all. 884 */ 885 static void 886 status(const struct afswtch *afp, int addrcount, struct sockaddr_dl *sdl, 887 struct if_msghdr *ifm, struct ifa_msghdr *ifam) 888 { 889 struct rt_addrinfo info; 890 int allfamilies, s; 891 struct ifstat ifs; 892 893 if (afp == NULL) { 894 allfamilies = 1; 895 ifr.ifr_addr.sa_family = AF_LOCAL; 896 } else { 897 allfamilies = 0; 898 ifr.ifr_addr.sa_family = 899 afp->af_af == AF_LINK ? AF_LOCAL : afp->af_af; 900 } 901 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 902 903 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0); 904 if (s < 0) 905 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 906 907 printf("%s: ", name); 908 printb("flags", flags, IFFBITS); 909 if (ifm->ifm_data.ifi_metric) 910 printf(" metric %ld", ifm->ifm_data.ifi_metric); 911 if (ifm->ifm_data.ifi_mtu) 912 printf(" mtu %ld", ifm->ifm_data.ifi_mtu); 913 putchar('\n'); 914 915 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) { 916 if (ifr.ifr_curcap != 0) { 917 printb("\toptions", ifr.ifr_curcap, IFCAPBITS); 918 putchar('\n'); 919 } 920 if (supmedia && ifr.ifr_reqcap != 0) { 921 printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS); 922 putchar('\n'); 923 if (ifr.ifr_reqcap & IFCAP_TSO) { 924 if (ioctl(s, SIOCGIFTSOLEN, 925 (caddr_t)&ifr) == 0) { 926 printf("\ttsolen %d", ifr.ifr_tsolen); 927 putchar('\n'); 928 } 929 } 930 } 931 } 932 933 tunnel_status(s); 934 935 while (addrcount > 0) { 936 info.rti_addrs = ifam->ifam_addrs; 937 /* Expand the compacted addresses */ 938 rt_xaddrs((char *)(ifam + 1), ifam->ifam_msglen + (char *)ifam, 939 &info); 940 941 if (allfamilies) { 942 const struct afswtch *p; 943 p = af_getbyfamily(info.rti_info[RTAX_IFA]->sa_family); 944 if (p != NULL && p->af_status != NULL) 945 p->af_status(s, &info); 946 } else if (afp->af_af == info.rti_info[RTAX_IFA]->sa_family) 947 afp->af_status(s, &info); 948 addrcount--; 949 ifam = (struct ifa_msghdr *)((char *)ifam + ifam->ifam_msglen); 950 } 951 if (allfamilies || afp->af_af == AF_LINK) { 952 const struct afswtch *lafp; 953 954 /* 955 * Hack; the link level address is received separately 956 * from the routing information so any address is not 957 * handled above. Cobble together an entry and invoke 958 * the status method specially. 959 */ 960 lafp = af_getbyname("lladdr"); 961 if (lafp != NULL) { 962 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; 963 lafp->af_status(s, &info); 964 } 965 } 966 if (allfamilies) 967 af_other_status(s); 968 else if (afp->af_other_status != NULL) 969 afp->af_other_status(s); 970 971 strlcpy(ifs.ifs_name, name, sizeof ifs.ifs_name); 972 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0) 973 printf("%s", ifs.ascii); 974 975 close(s); 976 return; 977 } 978 979 static void 980 tunnel_status(int s) 981 { 982 af_all_tunnel_status(s); 983 } 984 985 void 986 Perror(const char *cmd) 987 { 988 switch (errno) { 989 990 case ENXIO: 991 errx(1, "%s: no such interface", cmd); 992 break; 993 994 case EPERM: 995 errx(1, "%s: permission denied", cmd); 996 break; 997 998 default: 999 err(1, "%s", cmd); 1000 } 1001 } 1002 1003 /* 1004 * Print a value a la the %pb%i format of the kernel's kprintf() 1005 */ 1006 void 1007 printb(const char *s, unsigned v, const char *bits) 1008 { 1009 int i, any = 0; 1010 char c; 1011 1012 if (bits && *bits == 8) 1013 printf("%s=%o", s, v); 1014 else 1015 printf("%s=%x", s, v); 1016 bits++; 1017 if (bits) { 1018 putchar('<'); 1019 while ((i = *bits++) != '\0') { 1020 if (v & (1 << (i-1))) { 1021 if (any) 1022 putchar(','); 1023 any = 1; 1024 for (; (c = *bits) > 32; bits++) 1025 putchar(c); 1026 } else 1027 for (; *bits > 32; bits++) 1028 ; 1029 } 1030 putchar('>'); 1031 } 1032 } 1033 1034 void 1035 ifmaybeload(const char *name) 1036 { 1037 #define MOD_PREFIX_LEN 3 /* "if_" */ 1038 struct module_stat mstat; 1039 int fileid, modid; 1040 char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp; 1041 const char *cp; 1042 1043 /* loading suppressed by the user */ 1044 if (noload) 1045 return; 1046 1047 /* trim the interface number off the end */ 1048 strlcpy(ifname, name, sizeof(ifname)); 1049 for (dp = ifname; *dp != 0; dp++) 1050 if (isdigit(*dp)) { 1051 *dp = 0; 1052 break; 1053 } 1054 1055 /* turn interface and unit into module name */ 1056 strlcpy(ifkind, "if_", sizeof(ifkind)); 1057 strlcat(ifkind, ifname, sizeof(ifkind)); 1058 1059 /* scan files in kernel */ 1060 mstat.version = sizeof(struct module_stat); 1061 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { 1062 /* scan modules in file */ 1063 for (modid = kldfirstmod(fileid); modid > 0; 1064 modid = modfnext(modid)) { 1065 if (modstat(modid, &mstat) < 0) 1066 continue; 1067 /* strip bus name if present */ 1068 if ((cp = strchr(mstat.name, '/')) != NULL) { 1069 cp++; 1070 } else { 1071 cp = mstat.name; 1072 } 1073 /* already loaded? */ 1074 if (strcmp(ifname, cp) == 0 || 1075 strcmp(ifkind, cp) == 0) 1076 return; 1077 } 1078 } 1079 1080 /* not present, we should try to load it */ 1081 kldload(ifkind); 1082 } 1083 1084 static struct cmd basic_cmds[] = { 1085 DEF_CMD("up", IFF_UP, setifflags), 1086 DEF_CMD("down", -IFF_UP, setifflags), 1087 DEF_CMD("arp", -IFF_NOARP, setifflags), 1088 DEF_CMD("-arp", IFF_NOARP, setifflags), 1089 DEF_CMD("debug", IFF_DEBUG, setifflags), 1090 DEF_CMD("-debug", -IFF_DEBUG, setifflags), 1091 DEF_CMD("promisc", IFF_PPROMISC, setifflags), 1092 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags), 1093 DEF_CMD("add", IFF_UP, notealias), 1094 DEF_CMD("alias", IFF_UP, notealias), 1095 DEF_CMD("-alias", -IFF_UP, notealias), 1096 DEF_CMD("delete", -IFF_UP, notealias), 1097 DEF_CMD("remove", -IFF_UP, notealias), 1098 #ifdef notdef 1099 #define EN_SWABIPS 0x1000 1100 DEF_CMD("swabips", EN_SWABIPS, setifflags), 1101 DEF_CMD("-swabips", -EN_SWABIPS, setifflags), 1102 #endif 1103 DEF_CMD_ARG("netmask", setifnetmask), 1104 DEF_CMD_ARG("metric", setifmetric), 1105 DEF_CMD_ARG("broadcast", setifbroadaddr), 1106 DEF_CMD_ARG2("tunnel", settunnel), 1107 DEF_CMD("-tunnel", 0, deletetunnel), 1108 DEF_CMD("deletetunnel", 0, deletetunnel), 1109 DEF_CMD("link0", IFF_LINK0, setifflags), 1110 DEF_CMD("-link0", -IFF_LINK0, setifflags), 1111 DEF_CMD("link1", IFF_LINK1, setifflags), 1112 DEF_CMD("-link1", -IFF_LINK1, setifflags), 1113 DEF_CMD("link2", IFF_LINK2, setifflags), 1114 DEF_CMD("-link2", -IFF_LINK2, setifflags), 1115 DEF_CMD("monitor", IFF_MONITOR, setifflags), 1116 DEF_CMD("-monitor", -IFF_MONITOR, setifflags), 1117 DEF_CMD("staticarp", IFF_STATICARP, setifflags), 1118 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), 1119 DEF_CMD("polling", IFF_NPOLLING, setifflags), 1120 DEF_CMD("-polling", -IFF_NPOLLING, setifflags), 1121 DEF_CMD("npolling", IFF_NPOLLING, setifflags), 1122 DEF_CMD("-npolling", -IFF_NPOLLING, setifflags), 1123 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), 1124 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), 1125 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), 1126 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), 1127 DEF_CMD("netcons", IFCAP_NETCONS, setifcap), 1128 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), 1129 DEF_CMD("rss", IFCAP_RSS, setifcap), 1130 DEF_CMD("-rss", -IFCAP_RSS, setifcap), 1131 DEF_CMD("tso", IFCAP_TSO, setifcap), 1132 DEF_CMD("-tso", -IFCAP_TSO, setifcap), 1133 DEF_CMD("normal", -IFF_LINK0, setifflags), 1134 DEF_CMD("compress", IFF_LINK0, setifflags), 1135 DEF_CMD("noicmp", IFF_LINK1, setifflags), 1136 DEF_CMD_ARG("mtu", setifmtu), 1137 DEF_CMD_ARG("name", setifname), 1138 DEF_CMD_ARG("pollcpu", setifpollcpu), 1139 DEF_CMD_ARG("tsolen", setiftsolen) 1140 }; 1141 1142 static __constructor(101) void 1143 ifconfig_ctor(void) 1144 { 1145 size_t i; 1146 1147 for (i = 0; i < nitems(basic_cmds); i++) 1148 cmd_register(&basic_cmds[i]); 1149 } 1150