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 } else { 265 /* 266 * Do not allow to use `create` command as hostname 267 * if address family is not specified. 268 */ 269 if (argc > 0 && (strcmp(argv[0], "create") == 0 || 270 strcmp(argv[0], "plumb") == 0)) { 271 if (argc == 1) 272 errx(1, "interface %s alreay exists", 273 ifname); 274 argc--, argv++; 275 } 276 } 277 } 278 279 /* Check for address family */ 280 if (argc > 0) { 281 afp = af_getbyname(*argv); 282 if (afp != NULL) 283 argc--, argv++; 284 } 285 286 retry: 287 mib[0] = CTL_NET; 288 mib[1] = PF_ROUTE; 289 mib[2] = 0; 290 mib[3] = 0; /* address family */ 291 mib[4] = NET_RT_IFLIST; 292 mib[5] = ifindex; /* interface index */ 293 294 /* if particular family specified, only ask about it */ 295 if (afp != NULL) 296 mib[3] = afp->af_af; 297 298 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 299 errx(1, "iflist-sysctl-estimate"); 300 if ((buf = malloc(needed)) == NULL) 301 errx(1, "malloc"); 302 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 303 if (errno == ENOMEM && count++ < 10) { 304 warnx("Routing table grew, retrying"); 305 free(buf); 306 sleep(1); 307 goto retry; 308 } 309 errx(1, "actual retrieval of interface table"); 310 } 311 lim = buf + needed; 312 313 next = buf; 314 while (next < lim) { 315 int name_len; 316 317 ifm = (struct if_msghdr *)next; 318 319 if (ifm->ifm_type == RTM_IFINFO) { 320 #ifdef notyet 321 if (ifm->ifm_data.ifi_datalen == 0) 322 ifm->ifm_data.ifi_datalen = sizeof(struct if_data); 323 sdl = (struct sockaddr_dl *)((char *)ifm + sizeof(struct if_msghdr) - 324 sizeof(struct if_data) + ifm->ifm_data.ifi_datalen); 325 #else 326 sdl = (struct sockaddr_dl *)(ifm + 1); 327 #endif 328 flags = ifm->ifm_flags; 329 } else { 330 fprintf(stderr, "out of sync parsing NET_RT_IFLIST\n"); 331 fprintf(stderr, "expected %d, got %d\n", RTM_IFINFO, 332 ifm->ifm_type); 333 fprintf(stderr, "msglen = %d\n", ifm->ifm_msglen); 334 fprintf(stderr, "buf:%p, next:%p, lim:%p\n", buf, next, 335 lim); 336 exit(1); 337 } 338 339 next += ifm->ifm_msglen; 340 ifam = NULL; 341 addrcount = 0; 342 while (next < lim) { 343 nextifm = (struct if_msghdr *)next; 344 345 if (nextifm->ifm_type != RTM_NEWADDR) 346 break; 347 348 if (ifam == NULL) 349 ifam = (struct ifa_msghdr *)nextifm; 350 351 addrcount++; 352 next += nextifm->ifm_msglen; 353 } 354 355 if (sizeof(name) <= sdl->sdl_nlen) 356 name_len = sizeof(name) - 1; 357 else 358 name_len = sdl->sdl_nlen; 359 360 memcpy(name, sdl->sdl_data, name_len); 361 name[name_len] = '\0'; 362 363 if (all || namesonly) { 364 if (uponly) 365 if ((flags & IFF_UP) == 0) 366 continue; /* not up */ 367 if (downonly) 368 if (flags & IFF_UP) 369 continue; /* not down */ 370 if (namesonly) { 371 if (afp == NULL || afp->af_af != AF_LINK || 372 sdl->sdl_type == IFT_ETHER) { 373 if (need_nl) 374 putchar(' '); 375 fputs(name, stdout); 376 need_nl++; 377 } 378 continue; 379 } 380 } 381 382 if (argc > 0) 383 ifconfig(argc, argv, 0, afp); 384 else 385 status(afp, addrcount, sdl, ifm, ifam); 386 } 387 free(buf); 388 389 if (namesonly && need_nl > 0) 390 putchar('\n'); 391 392 return (0); 393 } 394 395 static struct afswtch *afs = NULL; 396 397 void 398 af_register(struct afswtch *p) 399 { 400 p->af_next = afs; 401 afs = p; 402 } 403 404 static struct afswtch * 405 af_getbyname(const char *name) 406 { 407 struct afswtch *afp; 408 409 for (afp = afs; afp != NULL; afp = afp->af_next) 410 if (strcmp(afp->af_name, name) == 0) 411 return afp; 412 return NULL; 413 } 414 415 static struct afswtch * 416 af_getbyfamily(int af) 417 { 418 struct afswtch *afp; 419 420 for (afp = afs; afp != NULL; afp = afp->af_next) 421 if (afp->af_af == af) 422 return afp; 423 return NULL; 424 } 425 426 static void 427 af_other_status(int s) 428 { 429 struct afswtch *afp; 430 uint8_t afmask[howmany(AF_MAX, NBBY)]; 431 432 memset(afmask, 0, sizeof(afmask)); 433 for (afp = afs; afp != NULL; afp = afp->af_next) { 434 if (afp->af_other_status == NULL) 435 continue; 436 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 437 continue; 438 afp->af_other_status(s); 439 setbit(afmask, afp->af_af); 440 } 441 } 442 443 static void 444 af_all_tunnel_status(int s) 445 { 446 struct afswtch *afp; 447 uint8_t afmask[howmany(AF_MAX, NBBY)]; 448 449 memset(afmask, 0, sizeof(afmask)); 450 for (afp = afs; afp != NULL; afp = afp->af_next) { 451 if (afp->af_status_tunnel == NULL) 452 continue; 453 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 454 continue; 455 afp->af_status_tunnel(s); 456 setbit(afmask, afp->af_af); 457 } 458 } 459 460 static struct cmd *cmds = NULL; 461 462 void 463 cmd_register(struct cmd *p) 464 { 465 p->c_next = cmds; 466 cmds = p; 467 } 468 469 static const struct cmd * 470 cmd_lookup(const char *name, int iscreate) 471 { 472 const struct cmd *p; 473 474 for (p = cmds; p != NULL; p = p->c_next) 475 if (strcmp(name, p->c_name) == 0) { 476 if (iscreate) { 477 if (p->c_iscloneop) 478 return p; 479 } else { 480 if (!p->c_iscloneop) 481 return p; 482 } 483 } 484 return NULL; 485 } 486 487 struct callback { 488 callback_func *cb_func; 489 void *cb_arg; 490 struct callback *cb_next; 491 }; 492 static struct callback *callbacks = NULL; 493 494 void 495 callback_register(callback_func *func, void *arg) 496 { 497 struct callback *cb; 498 499 cb = malloc(sizeof(struct callback)); 500 if (cb == NULL) 501 errx(1, "unable to allocate memory for callback"); 502 cb->cb_func = func; 503 cb->cb_arg = arg; 504 cb->cb_next = callbacks; 505 callbacks = cb; 506 } 507 508 /* specially-handled commands */ 509 static void setifaddr(const char *, int, int, const struct afswtch *); 510 static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr); 511 512 static void setifdstaddr(const char *, int, int, const struct afswtch *); 513 static const struct cmd setifdstaddr_cmd = 514 DEF_CMD("ifdstaddr", 0, setifdstaddr); 515 516 static int 517 ifconfig(int argc, char *const *argv, int iscreate, 518 const struct afswtch *uafp) 519 { 520 const struct afswtch *afp, *nafp; 521 struct callback *cb; 522 int s; 523 524 strlcpy(ifr.ifr_name, name, sizeof ifr.ifr_name); 525 afp = uafp != NULL ? uafp : af_getbyname("inet"); 526 top: 527 ifr.ifr_addr.sa_family = 528 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ? 529 AF_LOCAL : afp->af_af; 530 531 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 && 532 (uafp != NULL || errno != EAFNOSUPPORT || 533 (s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0)) 534 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 535 536 while (argc > 0) { 537 const struct cmd *p; 538 539 p = cmd_lookup(*argv, iscreate); 540 541 if (iscreate && p == NULL) { 542 /* 543 * Push the clone create callback so the new 544 * device is created and can be used for any 545 * remaining arguments. 546 */ 547 cb = callbacks; 548 if (cb == NULL) 549 errx(1, "internal error, no callback"); 550 callbacks = cb->cb_next; 551 cb->cb_func(s, cb->cb_arg); 552 iscreate = 0; 553 554 /* 555 * After cloning, make sure we have an up-to-date name 556 * in ifr_name. 557 */ 558 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 559 560 /* 561 * Handle any address family spec that 562 * immediately follows and potentially 563 * recreate the socket. 564 */ 565 nafp = af_getbyname(*argv); 566 if (nafp != NULL) { 567 argc--, argv++; 568 if (nafp != afp) { 569 close(s); 570 afp = nafp; 571 goto top; 572 } 573 } 574 /* 575 * Look for a normal parameter. 576 */ 577 continue; 578 } 579 if (p == NULL) { 580 /* 581 * Not a recognized command, choose between setting 582 * the interface address and the dst address. 583 */ 584 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd); 585 } 586 if (p->c_u.c_func || p->c_u.c_func2) { 587 if (p->c_parameter == NEXTARG) { 588 if (argv[1] == NULL) 589 errx(1, "'%s' requires argument", 590 p->c_name); 591 p->c_u.c_func(argv[1], 0, s, afp); 592 argc--, argv++; 593 } else if (p->c_parameter == OPTARG) { 594 p->c_u.c_func(argv[1], 0, s, afp); 595 if (argv[1] != NULL) 596 argc--, argv++; 597 } else if (p->c_parameter == NEXTARG2) { 598 if (argc < 3) 599 errx(1, "'%s' requires 2 arguments", 600 p->c_name); 601 p->c_u.c_func2(argv[1], argv[2], s, afp); 602 argc -= 2, argv += 2; 603 } else 604 p->c_u.c_func(*argv, p->c_parameter, s, afp); 605 } 606 argc--, argv++; 607 } 608 609 /* 610 * Do any post argument processing required by the address family. 611 */ 612 if (afp->af_postproc != NULL) 613 afp->af_postproc(s, afp); 614 /* 615 * Do deferred callbacks registered while processing 616 * command-line arguments. 617 */ 618 for (cb = callbacks; cb != NULL; cb = cb->cb_next) 619 cb->cb_func(s, cb->cb_arg); 620 /* 621 * Do deferred operations. 622 */ 623 if (clearaddr) { 624 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) { 625 warnx("interface %s cannot change %s addresses!", 626 name, afp->af_name); 627 clearaddr = 0; 628 } 629 } 630 if (clearaddr) { 631 int ret; 632 strlcpy(afp->af_ridreq, name, sizeof ifr.ifr_name); 633 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq); 634 if (ret < 0) { 635 if (errno == EADDRNOTAVAIL && (doalias >= 0)) { 636 /* means no previous address for interface */ 637 } else 638 Perror("ioctl (SIOCDIFADDR)"); 639 } 640 } 641 if (newaddr) { 642 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) { 643 warnx("interface %s cannot change %s addresses!", 644 name, afp->af_name); 645 newaddr = 0; 646 } 647 } 648 if (newaddr && (setaddr || setmask)) { 649 strlcpy(afp->af_addreq, name, sizeof ifr.ifr_name); 650 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0) 651 Perror("ioctl (SIOCAIFADDR)"); 652 } 653 654 close(s); 655 return (0); 656 } 657 658 /*ARGSUSED*/ 659 static void 660 setifaddr(const char *addr, int param, int s, const struct afswtch *afp) 661 { 662 if (afp->af_getaddr == NULL) 663 return; 664 /* 665 * Delay the ioctl to set the interface addr until flags are all set. 666 * The address interpretation may depend on the flags, 667 * and the flags may change when the address is set. 668 */ 669 setaddr++; 670 if (doalias == 0 && afp->af_af != AF_LINK) 671 clearaddr = 1; 672 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); 673 } 674 675 static void 676 settunnel(const char *src, const char *dst, int s, const struct afswtch *afp) 677 { 678 struct addrinfo *srcres, *dstres; 679 int ecode; 680 681 if (afp->af_settunnel == NULL) { 682 warn("address family %s does not support tunnel setup", 683 afp->af_name); 684 return; 685 } 686 687 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) 688 errx(1, "error in parsing address string: %s", 689 gai_strerror(ecode)); 690 691 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) 692 errx(1, "error in parsing address string: %s", 693 gai_strerror(ecode)); 694 695 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 696 errx(1, 697 "source and destination address families do not match"); 698 699 afp->af_settunnel(s, srcres, dstres); 700 701 freeaddrinfo(srcres); 702 freeaddrinfo(dstres); 703 } 704 705 /* ARGSUSED */ 706 static void 707 deletetunnel(const char *vname, int param, int s, const struct afswtch *afp) 708 { 709 710 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0) 711 err(1, "SIOCDIFPHYADDR"); 712 } 713 714 static void 715 setifnetmask(const char *addr, int dummy __unused, int s, 716 const struct afswtch *afp) 717 { 718 if (afp->af_getaddr != NULL) { 719 setmask++; 720 afp->af_getaddr(addr, MASK); 721 } 722 } 723 724 static void 725 setifbroadaddr(const char *addr, int dummy __unused, int s, 726 const struct afswtch *afp) 727 { 728 if (afp->af_getaddr != NULL) 729 afp->af_getaddr(addr, DSTADDR); 730 } 731 732 static void 733 notealias(const char *addr, int param, int s, const struct afswtch *afp) 734 { 735 #define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr)) 736 if (setaddr && doalias == 0 && param < 0) 737 if (afp->af_addreq != NULL && afp->af_ridreq != NULL) 738 bcopy((caddr_t)rqtosa(af_addreq), 739 (caddr_t)rqtosa(af_ridreq), 740 rqtosa(af_addreq)->sa_len); 741 doalias = param; 742 if (param < 0) { 743 clearaddr = 1; 744 newaddr = 0; 745 } else 746 clearaddr = 0; 747 #undef rqtosa 748 } 749 750 /*ARGSUSED*/ 751 static void 752 setifdstaddr(const char *addr, int param __unused, int s, 753 const struct afswtch *afp) 754 { 755 if (afp->af_getaddr != NULL) 756 afp->af_getaddr(addr, DSTADDR); 757 } 758 759 /* 760 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion 761 * of the ifreq structure, which may confuse other parts of ifconfig. 762 * Make a private copy so we can avoid that. 763 */ 764 static void 765 setifflags(const char *vname, int value, int s, const struct afswtch *afp) 766 { 767 struct ifreq my_ifr; 768 769 bcopy((char *)&ifr, (char *)&my_ifr, sizeof(struct ifreq)); 770 771 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) { 772 Perror("ioctl (SIOCGIFFLAGS)"); 773 } 774 strlcpy(my_ifr.ifr_name, name, sizeof (my_ifr.ifr_name)); 775 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16); 776 777 if (value < 0) { 778 value = -value; 779 flags &= ~value; 780 } else 781 flags |= value; 782 my_ifr.ifr_flags = flags & 0xffff; 783 my_ifr.ifr_flagshigh = flags >> 16; 784 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0) 785 Perror(vname); 786 } 787 788 void 789 setifcap(const char *vname, int value, int s, const struct afswtch *afp) 790 { 791 792 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) { 793 Perror("ioctl (SIOCGIFCAP)"); 794 } 795 flags = ifr.ifr_curcap; 796 if (value < 0) { 797 value = -value; 798 flags &= ~value; 799 } else 800 flags |= value; 801 ifr.ifr_reqcap = flags; 802 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0) 803 Perror(vname); 804 } 805 806 static void 807 setifmetric(const char *val, int dummy __unused, int s, 808 const struct afswtch *afp) 809 { 810 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 811 ifr.ifr_metric = atoi(val); 812 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0) 813 err(1, "ioctl SIOCSIFMETRIC (set metric)"); 814 } 815 816 static void 817 setifmtu(const char *val, int dummy __unused, int s, 818 const struct afswtch *afp) 819 { 820 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 821 ifr.ifr_mtu = atoi(val); 822 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0) 823 err(1, "ioctl SIOCSIFMTU (set mtu)"); 824 } 825 826 static void 827 setiftsolen(const char *val, int dummy __unused, int s, 828 const struct afswtch *afp) 829 { 830 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 831 ifr.ifr_tsolen = atoi(val); 832 if (ioctl(s, SIOCSIFTSOLEN, (caddr_t)&ifr) < 0) 833 err(1, "ioctl SIOCSIFTSOLEN (set tsolen)"); 834 } 835 836 static void 837 setifname(const char *val, int dummy __unused, int s, 838 const struct afswtch *afp) 839 { 840 char *newname; 841 842 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 843 844 newname = strdup(val); 845 if (newname == NULL) 846 err(1, "no memory to set ifname"); 847 ifr.ifr_data = newname; 848 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 849 free(newname); 850 err(1, "ioctl SIOCSIFNAME (set name)"); 851 } 852 printifname = 1; 853 strlcpy(name, newname, sizeof(name)); 854 free(newname); 855 } 856 857 static void 858 setifpollcpu(const char *val, int dummy __unused, int s, 859 const struct afswtch *afp) 860 { 861 warnx("pollcpu is deprecated, use polling or npolling instead"); 862 setifflags("npolling", IFF_NPOLLING, s, afp); 863 } 864 865 /* 866 * Expand the compacted form of addresses as returned via the 867 * configuration read via sysctl(). 868 */ 869 static void 870 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) 871 { 872 struct sockaddr *sa; 873 int i; 874 875 memset(rtinfo->rti_info, 0, sizeof(rtinfo->rti_info)); 876 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 877 if ((rtinfo->rti_addrs & (1 << i)) == 0) 878 continue; 879 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 880 RT_ADVANCE(cp, sa); 881 } 882 } 883 884 #define IFFBITS \ 885 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \ 886 "\10NOARP\11PROMISC\12ALLMULTI\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ 887 "\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP\25NPOLLING\26IDIRECT" 888 889 #define IFCAPBITS \ 890 "\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7RSS" \ 891 "\10VLAN_HWCSUM\11TSO" 892 893 /* 894 * Print the status of the interface. If an address family was 895 * specified, show only it; otherwise, show them all. 896 */ 897 static void 898 status(const struct afswtch *afp, int addrcount, struct sockaddr_dl *sdl, 899 struct if_msghdr *ifm, struct ifa_msghdr *ifam) 900 { 901 struct rt_addrinfo info; 902 int allfamilies, s; 903 struct ifstat ifs; 904 905 if (afp == NULL) { 906 allfamilies = 1; 907 ifr.ifr_addr.sa_family = AF_LOCAL; 908 } else { 909 allfamilies = 0; 910 ifr.ifr_addr.sa_family = 911 afp->af_af == AF_LINK ? AF_LOCAL : afp->af_af; 912 } 913 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 914 915 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0); 916 if (s < 0) 917 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 918 919 printf("%s: ", name); 920 printb("flags", flags, IFFBITS); 921 if (ifm->ifm_data.ifi_metric) 922 printf(" metric %ld", ifm->ifm_data.ifi_metric); 923 if (ifm->ifm_data.ifi_mtu) 924 printf(" mtu %ld", ifm->ifm_data.ifi_mtu); 925 putchar('\n'); 926 927 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) { 928 if (ifr.ifr_curcap != 0) { 929 printb("\toptions", ifr.ifr_curcap, IFCAPBITS); 930 putchar('\n'); 931 } 932 if (supmedia && ifr.ifr_reqcap != 0) { 933 printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS); 934 putchar('\n'); 935 if (ifr.ifr_reqcap & IFCAP_TSO) { 936 if (ioctl(s, SIOCGIFTSOLEN, 937 (caddr_t)&ifr) == 0) { 938 printf("\ttsolen %d", ifr.ifr_tsolen); 939 putchar('\n'); 940 } 941 } 942 } 943 } 944 945 tunnel_status(s); 946 947 while (addrcount > 0) { 948 info.rti_addrs = ifam->ifam_addrs; 949 /* Expand the compacted addresses */ 950 rt_xaddrs((char *)(ifam + 1), ifam->ifam_msglen + (char *)ifam, 951 &info); 952 953 if (allfamilies) { 954 const struct afswtch *p; 955 p = af_getbyfamily(info.rti_info[RTAX_IFA]->sa_family); 956 if (p != NULL && p->af_status != NULL) 957 p->af_status(s, &info); 958 } else if (afp->af_af == info.rti_info[RTAX_IFA]->sa_family) 959 afp->af_status(s, &info); 960 addrcount--; 961 ifam = (struct ifa_msghdr *)((char *)ifam + ifam->ifam_msglen); 962 } 963 if (allfamilies || afp->af_af == AF_LINK) { 964 const struct afswtch *lafp; 965 966 /* 967 * Hack; the link level address is received separately 968 * from the routing information so any address is not 969 * handled above. Cobble together an entry and invoke 970 * the status method specially. 971 */ 972 lafp = af_getbyname("lladdr"); 973 if (lafp != NULL) { 974 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; 975 lafp->af_status(s, &info); 976 } 977 } 978 if (allfamilies) 979 af_other_status(s); 980 else if (afp->af_other_status != NULL) 981 afp->af_other_status(s); 982 983 strlcpy(ifs.ifs_name, name, sizeof ifs.ifs_name); 984 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0) 985 printf("%s", ifs.ascii); 986 987 close(s); 988 return; 989 } 990 991 static void 992 tunnel_status(int s) 993 { 994 af_all_tunnel_status(s); 995 } 996 997 void 998 Perror(const char *cmd) 999 { 1000 switch (errno) { 1001 1002 case ENXIO: 1003 errx(1, "%s: no such interface", cmd); 1004 break; 1005 1006 case EPERM: 1007 errx(1, "%s: permission denied", cmd); 1008 break; 1009 1010 default: 1011 err(1, "%s", cmd); 1012 } 1013 } 1014 1015 /* 1016 * Print a value a la the %pb%i format of the kernel's kprintf() 1017 */ 1018 void 1019 printb(const char *s, unsigned v, const char *bits) 1020 { 1021 int i, any = 0; 1022 char c; 1023 1024 if (bits && *bits == 8) 1025 printf("%s=%o", s, v); 1026 else 1027 printf("%s=%x", s, v); 1028 bits++; 1029 if (bits) { 1030 putchar('<'); 1031 while ((i = *bits++) != '\0') { 1032 if (v & (1 << (i-1))) { 1033 if (any) 1034 putchar(','); 1035 any = 1; 1036 for (; (c = *bits) > 32; bits++) 1037 putchar(c); 1038 } else 1039 for (; *bits > 32; bits++) 1040 ; 1041 } 1042 putchar('>'); 1043 } 1044 } 1045 1046 void 1047 ifmaybeload(const char *name) 1048 { 1049 #define MOD_PREFIX_LEN 3 /* "if_" */ 1050 struct module_stat mstat; 1051 int fileid, modid; 1052 char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp; 1053 const char *cp; 1054 1055 /* loading suppressed by the user */ 1056 if (noload) 1057 return; 1058 1059 /* trim the interface number off the end */ 1060 strlcpy(ifname, name, sizeof(ifname)); 1061 for (dp = ifname; *dp != 0; dp++) 1062 if (isdigit(*dp)) { 1063 *dp = 0; 1064 break; 1065 } 1066 1067 /* turn interface and unit into module name */ 1068 strlcpy(ifkind, "if_", sizeof(ifkind)); 1069 strlcat(ifkind, ifname, sizeof(ifkind)); 1070 1071 /* scan files in kernel */ 1072 mstat.version = sizeof(struct module_stat); 1073 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { 1074 /* scan modules in file */ 1075 for (modid = kldfirstmod(fileid); modid > 0; 1076 modid = modfnext(modid)) { 1077 if (modstat(modid, &mstat) < 0) 1078 continue; 1079 /* strip bus name if present */ 1080 if ((cp = strchr(mstat.name, '/')) != NULL) { 1081 cp++; 1082 } else { 1083 cp = mstat.name; 1084 } 1085 /* already loaded? */ 1086 if (strcmp(ifname, cp) == 0 || 1087 strcmp(ifkind, cp) == 0) 1088 return; 1089 } 1090 } 1091 1092 /* not present, we should try to load it */ 1093 kldload(ifkind); 1094 } 1095 1096 static struct cmd basic_cmds[] = { 1097 DEF_CMD("up", IFF_UP, setifflags), 1098 DEF_CMD("down", -IFF_UP, setifflags), 1099 DEF_CMD("arp", -IFF_NOARP, setifflags), 1100 DEF_CMD("-arp", IFF_NOARP, setifflags), 1101 DEF_CMD("debug", IFF_DEBUG, setifflags), 1102 DEF_CMD("-debug", -IFF_DEBUG, setifflags), 1103 DEF_CMD("promisc", IFF_PPROMISC, setifflags), 1104 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags), 1105 DEF_CMD("add", IFF_UP, notealias), 1106 DEF_CMD("alias", IFF_UP, notealias), 1107 DEF_CMD("-alias", -IFF_UP, notealias), 1108 DEF_CMD("delete", -IFF_UP, notealias), 1109 DEF_CMD("remove", -IFF_UP, notealias), 1110 #ifdef notdef 1111 #define EN_SWABIPS 0x1000 1112 DEF_CMD("swabips", EN_SWABIPS, setifflags), 1113 DEF_CMD("-swabips", -EN_SWABIPS, setifflags), 1114 #endif 1115 DEF_CMD_ARG("netmask", setifnetmask), 1116 DEF_CMD_ARG("metric", setifmetric), 1117 DEF_CMD_ARG("broadcast", setifbroadaddr), 1118 DEF_CMD_ARG2("tunnel", settunnel), 1119 DEF_CMD("-tunnel", 0, deletetunnel), 1120 DEF_CMD("deletetunnel", 0, deletetunnel), 1121 DEF_CMD("link0", IFF_LINK0, setifflags), 1122 DEF_CMD("-link0", -IFF_LINK0, setifflags), 1123 DEF_CMD("link1", IFF_LINK1, setifflags), 1124 DEF_CMD("-link1", -IFF_LINK1, setifflags), 1125 DEF_CMD("link2", IFF_LINK2, setifflags), 1126 DEF_CMD("-link2", -IFF_LINK2, setifflags), 1127 DEF_CMD("monitor", IFF_MONITOR, setifflags), 1128 DEF_CMD("-monitor", -IFF_MONITOR, setifflags), 1129 DEF_CMD("staticarp", IFF_STATICARP, setifflags), 1130 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), 1131 DEF_CMD("polling", IFF_NPOLLING, setifflags), 1132 DEF_CMD("-polling", -IFF_NPOLLING, setifflags), 1133 DEF_CMD("npolling", IFF_NPOLLING, setifflags), 1134 DEF_CMD("-npolling", -IFF_NPOLLING, setifflags), 1135 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), 1136 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), 1137 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), 1138 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), 1139 DEF_CMD("netcons", IFCAP_NETCONS, setifcap), 1140 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), 1141 DEF_CMD("rss", IFCAP_RSS, setifcap), 1142 DEF_CMD("-rss", -IFCAP_RSS, setifcap), 1143 DEF_CMD("tso", IFCAP_TSO, setifcap), 1144 DEF_CMD("-tso", -IFCAP_TSO, setifcap), 1145 DEF_CMD("normal", -IFF_LINK0, setifflags), 1146 DEF_CMD("compress", IFF_LINK0, setifflags), 1147 DEF_CMD("noicmp", IFF_LINK1, setifflags), 1148 DEF_CMD_ARG("mtu", setifmtu), 1149 DEF_CMD_ARG("name", setifname), 1150 DEF_CMD_ARG("pollcpu", setifpollcpu), 1151 DEF_CMD_ARG("tsolen", setiftsolen) 1152 }; 1153 1154 static __constructor(101) void 1155 ifconfig_ctor(void) 1156 { 1157 size_t i; 1158 1159 for (i = 0; i < nitems(basic_cmds); i++) 1160 cmd_register(&basic_cmds[i]); 1161 } 1162