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 */ 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 * 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, int, 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) __dead2; 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 const char *ifname; 157 struct option *p; 158 size_t iflen; 159 160 all = downonly = uponly = namesonly = verbose = 0; 161 162 /* Parse leading line options */ 163 strlcpy(options, "adklmuv", sizeof(options)); 164 for (p = opts; p != NULL; p = p->next) 165 strlcat(options, p->opt, sizeof(options)); 166 while ((c = getopt(argc, argv, options)) != -1) { 167 switch (c) { 168 case 'a': /* scan all interfaces */ 169 all++; 170 break; 171 case 'd': /* restrict scan to "down" interfaces */ 172 downonly++; 173 break; 174 case 'k': 175 printkeys++; 176 break; 177 case 'l': /* scan interface names only */ 178 namesonly++; 179 break; 180 case 'm': /* show media choices in status */ 181 supmedia = 1; 182 break; 183 case 'u': /* restrict scan to "up" interfaces */ 184 uponly++; 185 break; 186 case 'v': 187 verbose++; 188 break; 189 default: 190 for (p = opts; p != NULL; p = p->next) 191 if (p->opt[0] == c) { 192 p->cb(optarg); 193 break; 194 } 195 if (p == NULL) 196 usage(); 197 break; 198 } 199 } 200 argc -= optind; 201 argv += optind; 202 203 /* -l cannot be used with -a or -m */ 204 if (namesonly && (all || supmedia)) 205 usage(); 206 207 /* nonsense.. */ 208 if (uponly && downonly) 209 usage(); 210 211 /* no arguments is equivalent to '-a' */ 212 if (!namesonly && argc < 1) 213 all = 1; 214 215 /* -a and -l allow an address family arg to limit the output */ 216 if (all || namesonly) { 217 if (argc > 1) 218 usage(); 219 220 ifname = NULL; 221 ifindex = 0; 222 if (argc == 1) { 223 afp = af_getbyname(*argv); 224 if (afp == NULL) 225 usage(); 226 if (afp->af_name != NULL) 227 argc--, argv++; 228 /* leave with afp non-zero */ 229 } 230 } else { 231 /* not listing, need an argument */ 232 if (argc < 1) 233 usage(); 234 235 ifname = *argv; 236 argc--, argv++; 237 238 /* check and maybe load support for this interface */ 239 ifmaybeload(ifname); 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 errx(1, "interface %s does not exist", ifname); 257 } 258 } 259 260 /* Check for address family */ 261 if (argc > 0) { 262 afp = af_getbyname(*argv); 263 if (afp != NULL) 264 argc--, argv++; 265 } 266 267 retry: 268 mib[0] = CTL_NET; 269 mib[1] = PF_ROUTE; 270 mib[2] = 0; 271 mib[3] = 0; /* address family */ 272 mib[4] = NET_RT_IFLIST; 273 mib[5] = ifindex; /* interface index */ 274 275 /* if particular family specified, only ask about it */ 276 if (afp != NULL) 277 mib[3] = afp->af_af; 278 279 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 280 errx(1, "iflist-sysctl-estimate"); 281 if ((buf = malloc(needed)) == NULL) 282 errx(1, "malloc"); 283 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 284 if (errno == ENOMEM && count++ < 10) { 285 warnx("Routing table grew, retrying"); 286 free(buf); 287 sleep(1); 288 goto retry; 289 } 290 errx(1, "actual retrieval of interface table"); 291 } 292 lim = buf + needed; 293 294 next = buf; 295 while (next < lim) { 296 int name_len; 297 298 ifm = (struct if_msghdr *)next; 299 300 if (ifm->ifm_type == RTM_IFINFO) { 301 #ifdef notyet 302 if (ifm->ifm_data.ifi_datalen == 0) 303 ifm->ifm_data.ifi_datalen = sizeof(struct if_data); 304 sdl = (struct sockaddr_dl *)((char *)ifm + sizeof(struct if_msghdr) - 305 sizeof(struct if_data) + ifm->ifm_data.ifi_datalen); 306 #else 307 sdl = (struct sockaddr_dl *)(ifm + 1); 308 #endif 309 flags = ifm->ifm_flags; 310 } else { 311 fprintf(stderr, "out of sync parsing NET_RT_IFLIST\n"); 312 fprintf(stderr, "expected %d, got %d\n", RTM_IFINFO, 313 ifm->ifm_type); 314 fprintf(stderr, "msglen = %d\n", ifm->ifm_msglen); 315 fprintf(stderr, "buf:%p, next:%p, lim:%p\n", buf, next, 316 lim); 317 exit (1); 318 } 319 320 next += ifm->ifm_msglen; 321 ifam = NULL; 322 addrcount = 0; 323 while (next < lim) { 324 325 nextifm = (struct if_msghdr *)next; 326 327 if (nextifm->ifm_type != RTM_NEWADDR) 328 break; 329 330 if (ifam == NULL) 331 ifam = (struct ifa_msghdr *)nextifm; 332 333 addrcount++; 334 next += nextifm->ifm_msglen; 335 } 336 337 if (sizeof(name) <= sdl->sdl_nlen) 338 name_len = sizeof(name) - 1; 339 else 340 name_len = sdl->sdl_nlen; 341 342 memcpy(name, sdl->sdl_data, name_len); 343 name[name_len] = '\0'; 344 345 if (all || namesonly) { 346 if (uponly) 347 if ((flags & IFF_UP) == 0) 348 continue; /* not up */ 349 if (downonly) 350 if (flags & IFF_UP) 351 continue; /* not down */ 352 if (namesonly) { 353 if (afp == NULL || afp->af_af != AF_LINK || 354 sdl->sdl_type == IFT_ETHER) { 355 if (need_nl) 356 putchar(' '); 357 fputs(name, stdout); 358 need_nl++; 359 } 360 continue; 361 } 362 } 363 364 if (argc > 0) 365 ifconfig(argc, argv, 0, afp); 366 else 367 status(afp, addrcount, sdl, ifm, ifam); 368 } 369 free(buf); 370 371 if (namesonly && need_nl > 0) 372 putchar('\n'); 373 if (printname) 374 printf("%s\n", name); 375 376 exit (0); 377 } 378 379 static struct afswtch *afs = NULL; 380 381 void 382 af_register(struct afswtch *p) 383 { 384 p->af_next = afs; 385 afs = p; 386 } 387 388 static struct afswtch * 389 af_getbyname(const char *name) 390 { 391 struct afswtch *afp; 392 393 for (afp = afs; afp != NULL; afp = afp->af_next) 394 if (strcmp(afp->af_name, name) == 0) 395 return afp; 396 return NULL; 397 } 398 399 static struct afswtch * 400 af_getbyfamily(int af) 401 { 402 struct afswtch *afp; 403 404 for (afp = afs; afp != NULL; afp = afp->af_next) 405 if (afp->af_af == af) 406 return afp; 407 return NULL; 408 } 409 410 static void 411 af_other_status(int s) 412 { 413 struct afswtch *afp; 414 uint8_t afmask[howmany(AF_MAX, NBBY)]; 415 416 memset(afmask, 0, sizeof(afmask)); 417 for (afp = afs; afp != NULL; afp = afp->af_next) { 418 if (afp->af_other_status == NULL) 419 continue; 420 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 421 continue; 422 afp->af_other_status(s); 423 setbit(afmask, afp->af_af); 424 } 425 } 426 427 static void 428 af_all_tunnel_status(int s) 429 { 430 struct afswtch *afp; 431 uint8_t afmask[howmany(AF_MAX, NBBY)]; 432 433 memset(afmask, 0, sizeof(afmask)); 434 for (afp = afs; afp != NULL; afp = afp->af_next) { 435 if (afp->af_status_tunnel == NULL) 436 continue; 437 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 438 continue; 439 afp->af_status_tunnel(s); 440 setbit(afmask, afp->af_af); 441 } 442 } 443 444 static struct cmd *cmds = NULL; 445 446 void 447 cmd_register(struct cmd *p) 448 { 449 p->c_next = cmds; 450 cmds = p; 451 } 452 453 static const struct cmd * 454 cmd_lookup(const char *name, int iscreate) 455 { 456 #define N(a) (sizeof(a)/sizeof(a[0])) 457 const struct cmd *p; 458 459 for (p = cmds; p != NULL; p = p->c_next) 460 if (strcmp(name, p->c_name) == 0) { 461 if (iscreate) { 462 if (p->c_iscloneop) 463 return p; 464 } else { 465 if (!p->c_iscloneop) 466 return p; 467 } 468 } 469 return NULL; 470 #undef N 471 } 472 473 struct callback { 474 callback_func *cb_func; 475 void *cb_arg; 476 struct callback *cb_next; 477 }; 478 static struct callback *callbacks = NULL; 479 480 void 481 callback_register(callback_func *func, void *arg) 482 { 483 struct callback *cb; 484 485 cb = malloc(sizeof(struct callback)); 486 if (cb == NULL) 487 errx(1, "unable to allocate memory for callback"); 488 cb->cb_func = func; 489 cb->cb_arg = arg; 490 cb->cb_next = callbacks; 491 callbacks = cb; 492 } 493 494 /* specially-handled commands */ 495 static void setifaddr(const char *, int, int, const struct afswtch *); 496 static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr); 497 498 static void setifdstaddr(const char *, int, int, const struct afswtch *); 499 static const struct cmd setifdstaddr_cmd = 500 DEF_CMD("ifdstaddr", 0, setifdstaddr); 501 502 static int 503 ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *uafp) 504 { 505 const struct afswtch *afp, *nafp; 506 struct callback *cb; 507 int s; 508 509 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name); 510 afp = uafp != NULL ? uafp : af_getbyname("inet"); 511 top: 512 ifr.ifr_addr.sa_family = 513 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ? 514 AF_INET : afp->af_af; 515 516 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0) 517 err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family); 518 519 while (argc > 0) { 520 const struct cmd *p; 521 522 p = cmd_lookup(*argv, iscreate); 523 524 if (iscreate && p == NULL) { 525 /* 526 * Push the clone create callback so the new 527 * device is created and can be used for any 528 * remaining arguments. 529 */ 530 cb = callbacks; 531 if (cb == NULL) 532 errx(1, "internal error, no callback"); 533 callbacks = cb->cb_next; 534 cb->cb_func(s, cb->cb_arg); 535 iscreate = 0; 536 /* 537 * Handle any address family spec that 538 * immediately follows and potentially 539 * recreate the socket. 540 */ 541 nafp = af_getbyname(*argv); 542 if (nafp != NULL) { 543 argc--, argv++; 544 if (nafp != afp) { 545 close(s); 546 afp = nafp; 547 goto top; 548 } 549 } 550 /* 551 * Look for a normal parameter. 552 */ 553 continue; 554 } 555 if (p == NULL) { 556 /* 557 * Not a recognized command, choose between setting 558 * the interface address and the dst address. 559 */ 560 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd); 561 } 562 if (p->c_u.c_func || p->c_u.c_func2) { 563 if (p->c_parameter == NEXTARG) { 564 if (argv[1] == NULL) 565 errx(1, "'%s' requires argument", 566 p->c_name); 567 p->c_u.c_func(argv[1], 0, s, afp); 568 argc--, argv++; 569 } else if (p->c_parameter == OPTARG) { 570 p->c_u.c_func(argv[1], 0, s, afp); 571 if (argv[1] != NULL) 572 argc--, argv++; 573 } else if (p->c_parameter == NEXTARG2) { 574 if (argc < 3) 575 errx(1, "'%s' requires 2 arguments", 576 p->c_name); 577 p->c_u.c_func2(argv[1], argv[2], s, afp); 578 argc -= 2, argv += 2; 579 } else 580 p->c_u.c_func(*argv, p->c_parameter, s, afp); 581 } 582 argc--, argv++; 583 } 584 585 /* 586 * Do any post argument processing required by the address family. 587 */ 588 if (afp->af_postproc != NULL) 589 afp->af_postproc(s, afp); 590 /* 591 * Do deferred callbacks registered while processing 592 * command-line arguments. 593 */ 594 for (cb = callbacks; cb != NULL; cb = cb->cb_next) 595 cb->cb_func(s, cb->cb_arg); 596 /* 597 * Do deferred operations. 598 */ 599 if (clearaddr) { 600 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) { 601 warnx("interface %s cannot change %s addresses!", 602 name, afp->af_name); 603 clearaddr = 0; 604 } 605 } 606 if (clearaddr) { 607 int ret; 608 strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name); 609 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq); 610 if (ret < 0) { 611 if (errno == EADDRNOTAVAIL && (doalias >= 0)) { 612 /* means no previous address for interface */ 613 } else 614 Perror("ioctl (SIOCDIFADDR)"); 615 } 616 } 617 if (newaddr) { 618 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) { 619 warnx("interface %s cannot change %s addresses!", 620 name, afp->af_name); 621 newaddr = 0; 622 } 623 } 624 if (newaddr && (setaddr || setmask)) { 625 strncpy(afp->af_addreq, name, sizeof ifr.ifr_name); 626 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0) 627 Perror("ioctl (SIOCAIFADDR)"); 628 } 629 630 close(s); 631 return(0); 632 } 633 634 /*ARGSUSED*/ 635 static void 636 setifaddr(const char *addr, int param, int s, const struct afswtch *afp) 637 { 638 if (afp->af_getaddr == NULL) 639 return; 640 /* 641 * Delay the ioctl to set the interface addr until flags are all set. 642 * The address interpretation may depend on the flags, 643 * and the flags may change when the address is set. 644 */ 645 setaddr++; 646 if (doalias == 0 && afp->af_af != AF_LINK) 647 clearaddr = 1; 648 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); 649 } 650 651 static void 652 settunnel(const char *src, const char *dst, int s, const struct afswtch *afp) 653 { 654 struct addrinfo *srcres, *dstres; 655 int ecode; 656 657 if (afp->af_settunnel == NULL) { 658 warn("address family %s does not support tunnel setup", 659 afp->af_name); 660 return; 661 } 662 663 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) 664 errx(1, "error in parsing address string: %s", 665 gai_strerror(ecode)); 666 667 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) 668 errx(1, "error in parsing address string: %s", 669 gai_strerror(ecode)); 670 671 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 672 errx(1, 673 "source and destination address families do not match"); 674 675 afp->af_settunnel(s, srcres, dstres); 676 677 freeaddrinfo(srcres); 678 freeaddrinfo(dstres); 679 } 680 681 /* ARGSUSED */ 682 static void 683 deletetunnel(const char *vname, int param, int s, const struct afswtch *afp) 684 { 685 686 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0) 687 err(1, "SIOCDIFPHYADDR"); 688 } 689 690 static void 691 setifnetmask(const char *addr, int dummy __unused, int s, 692 const struct afswtch *afp) 693 { 694 if (afp->af_getaddr != NULL) { 695 setmask++; 696 afp->af_getaddr(addr, MASK); 697 } 698 } 699 700 static void 701 setifbroadaddr(const char *addr, int dummy __unused, int s, 702 const struct afswtch *afp) 703 { 704 if (afp->af_getaddr != NULL) 705 afp->af_getaddr(addr, DSTADDR); 706 } 707 708 static void 709 setifipdst(const char *addr, int dummy __unused, int s, 710 const struct afswtch *afp) 711 { 712 const struct afswtch *inet; 713 714 inet = af_getbyname("inet"); 715 if (inet == NULL) 716 return; 717 inet->af_getaddr(addr, DSTADDR); 718 setipdst++; 719 clearaddr = 0; 720 newaddr = 0; 721 } 722 723 static void 724 notealias(const char *addr, int param, int s, const struct afswtch *afp) 725 { 726 #define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr)) 727 if (setaddr && doalias == 0 && param < 0) 728 if (afp->af_addreq != NULL && afp->af_ridreq != NULL) 729 bcopy((caddr_t)rqtosa(af_addreq), 730 (caddr_t)rqtosa(af_ridreq), 731 rqtosa(af_addreq)->sa_len); 732 doalias = param; 733 if (param < 0) { 734 clearaddr = 1; 735 newaddr = 0; 736 } else 737 clearaddr = 0; 738 #undef rqtosa 739 } 740 741 /*ARGSUSED*/ 742 static void 743 setifdstaddr(const char *addr, int param __unused, int s, 744 const struct afswtch *afp) 745 { 746 if (afp->af_getaddr != NULL) 747 afp->af_getaddr(addr, DSTADDR); 748 } 749 750 /* 751 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion 752 * of the ifreq structure, which may confuse other parts of ifconfig. 753 * Make a private copy so we can avoid that. 754 */ 755 static void 756 setifflags(const char *vname, int value, int s, const struct afswtch *afp) 757 { 758 struct ifreq my_ifr; 759 760 bcopy((char *)&ifr, (char *)&my_ifr, sizeof(struct ifreq)); 761 762 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) { 763 Perror("ioctl (SIOCGIFFLAGS)"); 764 exit(1); 765 } 766 strncpy(my_ifr.ifr_name, name, sizeof (my_ifr.ifr_name)); 767 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16); 768 769 if (value < 0) { 770 value = -value; 771 flags &= ~value; 772 } else 773 flags |= value; 774 my_ifr.ifr_flags = flags & 0xffff; 775 my_ifr.ifr_flagshigh = flags >> 16; 776 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0) 777 Perror(vname); 778 } 779 780 void 781 setifcap(const char *vname, int value, int s, const struct afswtch *afp) 782 { 783 784 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) { 785 Perror("ioctl (SIOCGIFCAP)"); 786 exit(1); 787 } 788 flags = ifr.ifr_curcap; 789 if (value < 0) { 790 value = -value; 791 flags &= ~value; 792 } else 793 flags |= value; 794 ifr.ifr_reqcap = flags; 795 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0) 796 Perror(vname); 797 } 798 799 static void 800 setifmetric(const char *val, int dummy __unused, int s, 801 const struct afswtch *afp) 802 { 803 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 804 ifr.ifr_metric = atoi(val); 805 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0) 806 warn("ioctl (set metric)"); 807 } 808 809 static void 810 setifmtu(const char *val, int dummy __unused, int s, 811 const struct afswtch *afp) 812 { 813 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 814 ifr.ifr_mtu = atoi(val); 815 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0) 816 warn("ioctl (set mtu)"); 817 } 818 819 static void 820 setifname(const char *val, int dummy __unused, int s, 821 const struct afswtch *afp) 822 { 823 char *newname; 824 825 newname = strdup(val); 826 if (newname == NULL) { 827 warn("no memory to set ifname"); 828 return; 829 } 830 ifr.ifr_data = newname; 831 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 832 warn("ioctl (set name)"); 833 free(newname); 834 return; 835 } 836 strlcpy(name, newname, sizeof(name)); 837 free(newname); 838 839 /* 840 * Even if we just created the interface, we don't need to print 841 * its name because we just nailed it down separately. 842 */ 843 printname = 0; 844 } 845 846 static void 847 setifpollcpu(const char *val, int dummy __unused, int s, 848 const struct afswtch *afp) 849 { 850 int pollcpu; 851 852 pollcpu = atoi(val); 853 if (pollcpu < 0) { 854 warn("pollcpu < 0"); 855 return; 856 } 857 858 setifflags("-polling", -IFF_POLLING, s, afp); 859 860 ifr.ifr_pollcpu = pollcpu; 861 if (ioctl(s, SIOCSIFPOLLCPU, (caddr_t)&ifr) < 0) { 862 warn("ioctl (set pollcpu)"); 863 return; 864 } 865 } 866 867 /* 868 * Expand the compacted form of addresses as returned via the 869 * configuration read via sysctl(). 870 */ 871 static void 872 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) 873 { 874 struct sockaddr *sa; 875 int i; 876 877 memset(rtinfo->rti_info, 0, sizeof(rtinfo->rti_info)); 878 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 879 if ((rtinfo->rti_addrs & (1 << i)) == 0) 880 continue; 881 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 882 cp += SA_SIZE(sa); 883 } 884 } 885 886 #define IFFBITS \ 887 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \ 888 "\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ 889 "\20MULTICAST\21POLLING\22PPROMISC\23MONITOR\24STATICARP\25NPOLLING" 890 891 #define IFCAPBITS \ 892 "\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7RSS" 893 894 /* 895 * Print the status of the interface. If an address family was 896 * specified, show only it; otherwise, show them all. 897 */ 898 static void 899 status(const struct afswtch *afp, int addrcount, struct sockaddr_dl *sdl, 900 struct if_msghdr *ifm, struct ifa_msghdr *ifam) 901 { 902 struct rt_addrinfo info; 903 int allfamilies, s; 904 struct ifstat ifs; 905 906 if (afp == NULL) { 907 allfamilies = 1; 908 afp = af_getbyname("inet"); 909 } else 910 allfamilies = 0; 911 912 ifr.ifr_addr.sa_family = afp->af_af == AF_LINK ? AF_INET : afp->af_af; 913 strncpy(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 } 936 } 937 938 tunnel_status(s); 939 940 while (addrcount > 0) { 941 info.rti_addrs = ifam->ifam_addrs; 942 /* Expand the compacted addresses */ 943 rt_xaddrs((char *)(ifam + 1), ifam->ifam_msglen + (char *)ifam, 944 &info); 945 946 if (allfamilies) { 947 const struct afswtch *p; 948 p = af_getbyfamily(info.rti_info[RTAX_IFA]->sa_family); 949 if (p != NULL && p->af_status != NULL) 950 p->af_status(s, &info); 951 } else if (afp->af_af == info.rti_info[RTAX_IFA]->sa_family) 952 afp->af_status(s, &info); 953 addrcount--; 954 ifam = (struct ifa_msghdr *)((char *)ifam + ifam->ifam_msglen); 955 } 956 if (allfamilies || afp->af_af == AF_LINK) { 957 const struct afswtch *lafp; 958 959 /* 960 * Hack; the link level address is received separately 961 * from the routing information so any address is not 962 * handled above. Cobble together an entry and invoke 963 * the status method specially. 964 */ 965 lafp = af_getbyname("lladdr"); 966 if (lafp != NULL) { 967 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; 968 lafp->af_status(s, &info); 969 } 970 } 971 if (allfamilies) 972 af_other_status(s); 973 else if (afp->af_other_status != NULL) 974 afp->af_other_status(s); 975 976 strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name); 977 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0) 978 printf("%s", ifs.ascii); 979 980 if (flags & IFF_POLLING) { 981 if (ioctl(s, SIOCGIFPOLLCPU, &ifr) == 0 && ifr.ifr_pollcpu >= 0) 982 printf("\tpollcpu: %d\n", ifr.ifr_pollcpu); 983 } 984 985 close(s); 986 return; 987 } 988 989 static void 990 tunnel_status(int s) 991 { 992 af_all_tunnel_status(s); 993 } 994 995 void 996 Perror(const char *cmd) 997 { 998 switch (errno) { 999 1000 case ENXIO: 1001 errx(1, "%s: no such interface", cmd); 1002 break; 1003 1004 case EPERM: 1005 errx(1, "%s: permission denied", cmd); 1006 break; 1007 1008 default: 1009 err(1, "%s", cmd); 1010 } 1011 } 1012 1013 /* 1014 * Print a value a la the %b format of the kernel's printf 1015 */ 1016 void 1017 printb(const char *s, unsigned v, const char *bits) 1018 { 1019 int i, any = 0; 1020 char c; 1021 1022 if (bits && *bits == 8) 1023 printf("%s=%o", s, v); 1024 else 1025 printf("%s=%x", s, v); 1026 bits++; 1027 if (bits) { 1028 putchar('<'); 1029 while ((i = *bits++) != '\0') { 1030 if (v & (1 << (i-1))) { 1031 if (any) 1032 putchar(','); 1033 any = 1; 1034 for (; (c = *bits) > 32; bits++) 1035 putchar(c); 1036 } else 1037 for (; *bits > 32; bits++) 1038 ; 1039 } 1040 putchar('>'); 1041 } 1042 } 1043 1044 void 1045 ifmaybeload(const char *name) 1046 { 1047 struct module_stat mstat; 1048 int fileid, modid; 1049 char ifkind[35], *dp; 1050 const char *cp; 1051 1052 /* turn interface and unit into module name */ 1053 strcpy(ifkind, "if_"); 1054 for (cp = name, dp = ifkind + 3; 1055 (*cp != 0) && !isdigit(*cp); cp++, dp++) 1056 *dp = *cp; 1057 *dp = 0; 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 (strncmp(name, cp, strlen(cp)) == 0 || 1075 strncmp(ifkind, cp, strlen(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 #ifndef NO_IPX 1107 DEF_CMD_ARG("ipdst", setifipdst), 1108 #endif 1109 DEF_CMD_ARG2("tunnel", settunnel), 1110 DEF_CMD("-tunnel", 0, deletetunnel), 1111 DEF_CMD("deletetunnel", 0, deletetunnel), 1112 DEF_CMD("link0", IFF_LINK0, setifflags), 1113 DEF_CMD("-link0", -IFF_LINK0, setifflags), 1114 DEF_CMD("link1", IFF_LINK1, setifflags), 1115 DEF_CMD("-link1", -IFF_LINK1, setifflags), 1116 DEF_CMD("link2", IFF_LINK2, setifflags), 1117 DEF_CMD("-link2", -IFF_LINK2, setifflags), 1118 DEF_CMD("monitor", IFF_MONITOR, setifflags), 1119 DEF_CMD("-monitor", -IFF_MONITOR, setifflags), 1120 DEF_CMD("staticarp", IFF_STATICARP, setifflags), 1121 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), 1122 DEF_CMD("polling", IFF_POLLING, setifflags), 1123 DEF_CMD("-polling", -IFF_POLLING, setifflags), 1124 DEF_CMD("npolling", IFF_NPOLLING, setifflags), 1125 DEF_CMD("-npolling", -IFF_NPOLLING, setifflags), 1126 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), 1127 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), 1128 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), 1129 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), 1130 DEF_CMD("netcons", IFCAP_NETCONS, setifcap), 1131 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), 1132 DEF_CMD("rss", IFCAP_RSS, setifcap), 1133 DEF_CMD("-rss", -IFCAP_RSS, setifcap), 1134 DEF_CMD("normal", -IFF_LINK0, setifflags), 1135 DEF_CMD("compress", IFF_LINK0, setifflags), 1136 DEF_CMD("noicmp", IFF_LINK1, setifflags), 1137 DEF_CMD_ARG("mtu", setifmtu), 1138 DEF_CMD_ARG("name", setifname), 1139 DEF_CMD_ARG("pollcpu", setifpollcpu) 1140 }; 1141 1142 static __constructor(101) void 1143 ifconfig_ctor(void) 1144 { 1145 #define N(a) (sizeof(a) / sizeof(a[0])) 1146 int i; 1147 1148 for (i = 0; i < N(basic_cmds); i++) 1149 cmd_register(&basic_cmds[i]); 1150 #undef N 1151 } 1152