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 40 #include <net/ethernet.h> 41 #include <net/if.h> 42 #include <net/if_var.h> 43 #include <net/if_dl.h> 44 #include <net/if_types.h> 45 #include <net/route.h> 46 47 /* IP */ 48 #include <netinet/in.h> 49 #include <netinet/in_var.h> 50 #include <arpa/inet.h> 51 #include <netdb.h> 52 53 #include <ctype.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 62 #include "ifconfig.h" 63 64 /* 65 * This macro returns the size of a struct sockaddr when passed 66 * through a routing socket. Basically we round up sa_len to 67 * a multiple of sizeof(long), with a minimum of sizeof(long). 68 * The check for a NULL pointer is just a convenience, probably never used. 69 * The case sa_len == 0 should only apply to empty structures. 70 */ 71 #define SA_SIZE(sa) \ 72 ( (!(sa) || ((struct sockaddr *)(sa))->sa_len == 0) ? \ 73 sizeof(long) : \ 74 1 + ( (((struct sockaddr *)(sa))->sa_len - 1) | (sizeof(long) - 1) ) ) 75 76 /* 77 * Since "struct ifreq" is composed of various union members, callers 78 * should pay special attention to interprete the value. 79 * (.e.g. little/big endian difference in the structure.) 80 */ 81 struct ifreq ifr; 82 83 char name[IFNAMSIZ]; 84 int flags; 85 int setaddr; 86 int setipdst; 87 int setmask; 88 int doalias; 89 int clearaddr; 90 int newaddr = 1; 91 int verbose; 92 93 int supmedia = 0; 94 int printkeys = 0; /* Print keying material for interfaces. */ 95 int printname = 0; /* Print the name of the created interface. */ 96 97 static int ifconfig(int argc, char *const *argv, int, const struct afswtch *afp); 98 static void status(const struct afswtch *afp, int addrcount, 99 struct sockaddr_dl *sdl, struct if_msghdr *ifm, 100 struct ifa_msghdr *ifam); 101 static void tunnel_status(int s); 102 static void usage(void) __dead2; 103 104 static struct afswtch *af_getbyname(const char *name); 105 static struct afswtch *af_getbyfamily(int af); 106 static void af_other_status(int); 107 108 static struct option *opts = NULL; 109 110 void 111 opt_register(struct option *p) 112 { 113 p->next = opts; 114 opts = p; 115 } 116 117 static void 118 usage(void) 119 { 120 char options[1024]; 121 struct option *p; 122 123 /* XXX not right but close enough for now */ 124 options[0] = '\0'; 125 for (p = opts; p != NULL; p = p->next) { 126 strlcat(options, p->opt_usage, sizeof(options)); 127 strlcat(options, " ", sizeof(options)); 128 } 129 130 fprintf(stderr, 131 "usage: ifconfig %sinterface address_family [address [dest_address]]\n" 132 " [parameters]\n" 133 " ifconfig interface create\n" 134 " ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n" 135 " ifconfig -l [-d] [-u] [address_family]\n" 136 " ifconfig %s[-d] [-m] [-u] [-v]\n", 137 options, options, options); 138 exit(1); 139 } 140 141 int 142 main(int argc, char *argv[]) 143 { 144 int c, all, namesonly, downonly, uponly; 145 int need_nl = 0, count = 0; 146 const struct afswtch *afp = NULL; 147 int addrcount, ifindex; 148 struct if_msghdr *ifm, *nextifm; 149 struct ifa_msghdr *ifam; 150 struct sockaddr_dl *sdl; 151 char *buf, *lim, *next; 152 size_t needed; 153 int mib[6]; 154 char options[1024]; 155 const char *ifname; 156 struct option *p; 157 size_t iflen; 158 159 all = downonly = uponly = namesonly = verbose = 0; 160 161 /* Parse leading line options */ 162 strlcpy(options, "adklmuv", sizeof(options)); 163 for (p = opts; p != NULL; p = p->next) 164 strlcat(options, p->opt, sizeof(options)); 165 while ((c = getopt(argc, argv, options)) != -1) { 166 switch (c) { 167 case 'a': /* scan all interfaces */ 168 all++; 169 break; 170 case 'd': /* restrict scan to "down" interfaces */ 171 downonly++; 172 break; 173 case 'k': 174 printkeys++; 175 break; 176 case 'l': /* scan interface names only */ 177 namesonly++; 178 break; 179 case 'm': /* show media choices in status */ 180 supmedia = 1; 181 break; 182 case 'u': /* restrict scan to "up" interfaces */ 183 uponly++; 184 break; 185 case 'v': 186 verbose++; 187 break; 188 default: 189 for (p = opts; p != NULL; p = p->next) 190 if (p->opt[0] == c) { 191 p->cb(optarg); 192 break; 193 } 194 if (p == NULL) 195 usage(); 196 break; 197 } 198 } 199 argc -= optind; 200 argv += optind; 201 202 /* -l cannot be used with -a or -m */ 203 if (namesonly && (all || supmedia)) 204 usage(); 205 206 /* nonsense.. */ 207 if (uponly && downonly) 208 usage(); 209 210 /* no arguments is equivalent to '-a' */ 211 if (!namesonly && argc < 1) 212 all = 1; 213 214 /* -a and -l allow an address family arg to limit the output */ 215 if (all || namesonly) { 216 if (argc > 1) 217 usage(); 218 219 ifname = NULL; 220 ifindex = 0; 221 if (argc == 1) { 222 afp = af_getbyname(*argv); 223 if (afp == NULL) 224 usage(); 225 if (afp->af_name != NULL) 226 argc--, argv++; 227 /* leave with afp non-zero */ 228 } 229 } else { 230 /* not listing, need an argument */ 231 if (argc < 1) 232 usage(); 233 234 ifname = *argv; 235 argc--, argv++; 236 237 /* check and maybe load support for this interface */ 238 ifmaybeload(ifname); 239 ifindex = if_nametoindex(ifname); 240 if (ifindex == 0) { 241 /* 242 * NOTE: We must special-case the `create' command 243 * right here as we would otherwise fail when trying 244 * to find the interface. 245 */ 246 if (argc > 0 && (strcmp(argv[0], "create") == 0 || 247 strcmp(argv[0], "plumb") == 0)) { 248 iflen = strlcpy(name, ifname, sizeof(name)); 249 if (iflen >= sizeof(name)) 250 errx(1, "%s: cloning name too long", 251 ifname); 252 ifconfig(argc, argv, 1, NULL); 253 exit(0); 254 } 255 errx(1, "interface %s does not exist", ifname); 256 } 257 } 258 259 /* Check for address family */ 260 if (argc > 0) { 261 afp = af_getbyname(*argv); 262 if (afp != NULL) 263 argc--, argv++; 264 } 265 266 retry: 267 mib[0] = CTL_NET; 268 mib[1] = PF_ROUTE; 269 mib[2] = 0; 270 mib[3] = 0; /* address family */ 271 mib[4] = NET_RT_IFLIST; 272 mib[5] = ifindex; /* interface index */ 273 274 /* if particular family specified, only ask about it */ 275 if (afp != NULL) 276 mib[3] = afp->af_af; 277 278 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) 279 errx(1, "iflist-sysctl-estimate"); 280 if ((buf = malloc(needed)) == NULL) 281 errx(1, "malloc"); 282 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 283 if (errno == ENOMEM && count++ < 10) { 284 warnx("Routing table grew, retrying"); 285 free(buf); 286 sleep(1); 287 goto retry; 288 } 289 errx(1, "actual retrieval of interface table"); 290 } 291 lim = buf + needed; 292 293 next = buf; 294 while (next < lim) { 295 int name_len; 296 297 ifm = (struct if_msghdr *)next; 298 299 if (ifm->ifm_type == RTM_IFINFO) { 300 #ifdef notyet 301 if (ifm->ifm_data.ifi_datalen == 0) 302 ifm->ifm_data.ifi_datalen = sizeof(struct if_data); 303 sdl = (struct sockaddr_dl *)((char *)ifm + sizeof(struct if_msghdr) - 304 sizeof(struct if_data) + ifm->ifm_data.ifi_datalen); 305 #else 306 sdl = (struct sockaddr_dl *)(ifm + 1); 307 #endif 308 flags = ifm->ifm_flags; 309 } else { 310 fprintf(stderr, "out of sync parsing NET_RT_IFLIST\n"); 311 fprintf(stderr, "expected %d, got %d\n", RTM_IFINFO, 312 ifm->ifm_type); 313 fprintf(stderr, "msglen = %d\n", ifm->ifm_msglen); 314 fprintf(stderr, "buf:%p, next:%p, lim:%p\n", buf, next, 315 lim); 316 exit (1); 317 } 318 319 next += ifm->ifm_msglen; 320 ifam = NULL; 321 addrcount = 0; 322 while (next < lim) { 323 324 nextifm = (struct if_msghdr *)next; 325 326 if (nextifm->ifm_type != RTM_NEWADDR) 327 break; 328 329 if (ifam == NULL) 330 ifam = (struct ifa_msghdr *)nextifm; 331 332 addrcount++; 333 next += nextifm->ifm_msglen; 334 } 335 336 if (sizeof(name) <= sdl->sdl_nlen) 337 name_len = sizeof(name) - 1; 338 else 339 name_len = sdl->sdl_nlen; 340 341 memcpy(name, sdl->sdl_data, name_len); 342 name[name_len] = '\0'; 343 344 if (all || namesonly) { 345 if (uponly) 346 if ((flags & IFF_UP) == 0) 347 continue; /* not up */ 348 if (downonly) 349 if (flags & IFF_UP) 350 continue; /* not down */ 351 if (namesonly) { 352 if (afp == NULL || afp->af_af != AF_LINK || 353 sdl->sdl_type == IFT_ETHER) { 354 if (need_nl) 355 putchar(' '); 356 fputs(name, stdout); 357 need_nl++; 358 } 359 continue; 360 } 361 } 362 363 if (argc > 0) 364 ifconfig(argc, argv, 0, afp); 365 else 366 status(afp, addrcount, sdl, ifm, ifam); 367 } 368 free(buf); 369 370 if (namesonly && need_nl > 0) 371 putchar('\n'); 372 if (printname) 373 printf("%s\n", name); 374 375 exit (0); 376 } 377 378 static struct afswtch *afs = NULL; 379 380 void 381 af_register(struct afswtch *p) 382 { 383 p->af_next = afs; 384 afs = p; 385 } 386 387 static struct afswtch * 388 af_getbyname(const char *name) 389 { 390 struct afswtch *afp; 391 392 for (afp = afs; afp != NULL; afp = afp->af_next) 393 if (strcmp(afp->af_name, name) == 0) 394 return afp; 395 return NULL; 396 } 397 398 static struct afswtch * 399 af_getbyfamily(int af) 400 { 401 struct afswtch *afp; 402 403 for (afp = afs; afp != NULL; afp = afp->af_next) 404 if (afp->af_af == af) 405 return afp; 406 return NULL; 407 } 408 409 static void 410 af_other_status(int s) 411 { 412 struct afswtch *afp; 413 uint8_t afmask[howmany(AF_MAX, NBBY)]; 414 415 memset(afmask, 0, sizeof(afmask)); 416 for (afp = afs; afp != NULL; afp = afp->af_next) { 417 if (afp->af_other_status == NULL) 418 continue; 419 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 420 continue; 421 afp->af_other_status(s); 422 setbit(afmask, afp->af_af); 423 } 424 } 425 426 static void 427 af_all_tunnel_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_status_tunnel == NULL) 435 continue; 436 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 437 continue; 438 afp->af_status_tunnel(s); 439 setbit(afmask, afp->af_af); 440 } 441 } 442 443 static struct cmd *cmds = NULL; 444 445 void 446 cmd_register(struct cmd *p) 447 { 448 p->c_next = cmds; 449 cmds = p; 450 } 451 452 static const struct cmd * 453 cmd_lookup(const char *name, int iscreate) 454 { 455 #define N(a) (sizeof(a)/sizeof(a[0])) 456 const struct cmd *p; 457 458 for (p = cmds; p != NULL; p = p->c_next) 459 if (strcmp(name, p->c_name) == 0) { 460 if (iscreate) { 461 if (p->c_iscloneop) 462 return p; 463 } else { 464 if (!p->c_iscloneop) 465 return p; 466 } 467 } 468 return NULL; 469 #undef N 470 } 471 472 struct callback { 473 callback_func *cb_func; 474 void *cb_arg; 475 struct callback *cb_next; 476 }; 477 static struct callback *callbacks = NULL; 478 479 void 480 callback_register(callback_func *func, void *arg) 481 { 482 struct callback *cb; 483 484 cb = malloc(sizeof(struct callback)); 485 if (cb == NULL) 486 errx(1, "unable to allocate memory for callback"); 487 cb->cb_func = func; 488 cb->cb_arg = arg; 489 cb->cb_next = callbacks; 490 callbacks = cb; 491 } 492 493 /* specially-handled commands */ 494 static void setifaddr(const char *, int, int, const struct afswtch *); 495 static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr); 496 497 static void setifdstaddr(const char *, int, int, const struct afswtch *); 498 static const struct cmd setifdstaddr_cmd = 499 DEF_CMD("ifdstaddr", 0, setifdstaddr); 500 501 static int 502 ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *uafp) 503 { 504 const struct afswtch *afp, *nafp; 505 struct callback *cb; 506 int s; 507 508 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name); 509 afp = uafp != NULL ? uafp : af_getbyname("inet"); 510 top: 511 ifr.ifr_addr.sa_family = 512 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ? 513 AF_INET : afp->af_af; 514 515 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0) 516 err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family); 517 518 while (argc > 0) { 519 const struct cmd *p; 520 521 p = cmd_lookup(*argv, iscreate); 522 523 if (iscreate && p == NULL) { 524 /* 525 * Push the clone create callback so the new 526 * device is created and can be used for any 527 * remaining arguments. 528 */ 529 cb = callbacks; 530 if (cb == NULL) 531 errx(1, "internal error, no callback"); 532 callbacks = cb->cb_next; 533 cb->cb_func(s, cb->cb_arg); 534 iscreate = 0; 535 /* 536 * Handle any address family spec that 537 * immediately follows and potentially 538 * recreate the socket. 539 */ 540 nafp = af_getbyname(*argv); 541 if (nafp != NULL) { 542 argc--, argv++; 543 if (nafp != afp) { 544 close(s); 545 afp = nafp; 546 goto top; 547 } 548 } 549 /* 550 * Look for a normal parameter. 551 */ 552 continue; 553 } 554 if (p == NULL) { 555 /* 556 * Not a recognized command, choose between setting 557 * the interface address and the dst address. 558 */ 559 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd); 560 } 561 if (p->c_u.c_func || p->c_u.c_func2) { 562 if (p->c_parameter == NEXTARG) { 563 if (argv[1] == NULL) 564 errx(1, "'%s' requires argument", 565 p->c_name); 566 p->c_u.c_func(argv[1], 0, s, afp); 567 argc--, argv++; 568 } else if (p->c_parameter == OPTARG) { 569 p->c_u.c_func(argv[1], 0, s, afp); 570 if (argv[1] != NULL) 571 argc--, argv++; 572 } else if (p->c_parameter == NEXTARG2) { 573 if (argc < 3) 574 errx(1, "'%s' requires 2 arguments", 575 p->c_name); 576 p->c_u.c_func2(argv[1], argv[2], s, afp); 577 argc -= 2, argv += 2; 578 } else 579 p->c_u.c_func(*argv, p->c_parameter, s, afp); 580 } 581 argc--, argv++; 582 } 583 584 /* 585 * Do any post argument processing required by the address family. 586 */ 587 if (afp->af_postproc != NULL) 588 afp->af_postproc(s, afp); 589 /* 590 * Do deferred callbacks registered while processing 591 * command-line arguments. 592 */ 593 for (cb = callbacks; cb != NULL; cb = cb->cb_next) 594 cb->cb_func(s, cb->cb_arg); 595 /* 596 * Do deferred operations. 597 */ 598 if (clearaddr) { 599 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) { 600 warnx("interface %s cannot change %s addresses!", 601 name, afp->af_name); 602 clearaddr = 0; 603 } 604 } 605 if (clearaddr) { 606 int ret; 607 strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name); 608 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq); 609 if (ret < 0) { 610 if (errno == EADDRNOTAVAIL && (doalias >= 0)) { 611 /* means no previous address for interface */ 612 } else 613 Perror("ioctl (SIOCDIFADDR)"); 614 } 615 } 616 if (newaddr) { 617 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) { 618 warnx("interface %s cannot change %s addresses!", 619 name, afp->af_name); 620 newaddr = 0; 621 } 622 } 623 if (newaddr && (setaddr || setmask)) { 624 strncpy(afp->af_addreq, name, sizeof ifr.ifr_name); 625 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0) 626 Perror("ioctl (SIOCAIFADDR)"); 627 } 628 629 close(s); 630 return(0); 631 } 632 633 /*ARGSUSED*/ 634 static void 635 setifaddr(const char *addr, int param, int s, const struct afswtch *afp) 636 { 637 if (afp->af_getaddr == NULL) 638 return; 639 /* 640 * Delay the ioctl to set the interface addr until flags are all set. 641 * The address interpretation may depend on the flags, 642 * and the flags may change when the address is set. 643 */ 644 setaddr++; 645 if (doalias == 0 && afp->af_af != AF_LINK) 646 clearaddr = 1; 647 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); 648 } 649 650 static void 651 settunnel(const char *src, const char *dst, int s, const struct afswtch *afp) 652 { 653 struct addrinfo *srcres, *dstres; 654 int ecode; 655 656 if (afp->af_settunnel == NULL) { 657 warn("address family %s does not support tunnel setup", 658 afp->af_name); 659 return; 660 } 661 662 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) 663 errx(1, "error in parsing address string: %s", 664 gai_strerror(ecode)); 665 666 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) 667 errx(1, "error in parsing address string: %s", 668 gai_strerror(ecode)); 669 670 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 671 errx(1, 672 "source and destination address families do not match"); 673 674 afp->af_settunnel(s, srcres, dstres); 675 676 freeaddrinfo(srcres); 677 freeaddrinfo(dstres); 678 } 679 680 /* ARGSUSED */ 681 static void 682 deletetunnel(const char *vname, int param, int s, const struct afswtch *afp) 683 { 684 685 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0) 686 err(1, "SIOCDIFPHYADDR"); 687 } 688 689 static void 690 setifnetmask(const char *addr, int dummy __unused, int s, 691 const struct afswtch *afp) 692 { 693 if (afp->af_getaddr != NULL) { 694 setmask++; 695 afp->af_getaddr(addr, MASK); 696 } 697 } 698 699 static void 700 setifbroadaddr(const char *addr, int dummy __unused, int s, 701 const struct afswtch *afp) 702 { 703 if (afp->af_getaddr != NULL) 704 afp->af_getaddr(addr, DSTADDR); 705 } 706 707 static void 708 setifipdst(const char *addr, int dummy __unused, int s, 709 const struct afswtch *afp) 710 { 711 const struct afswtch *inet; 712 713 inet = af_getbyname("inet"); 714 if (inet == NULL) 715 return; 716 inet->af_getaddr(addr, DSTADDR); 717 setipdst++; 718 clearaddr = 0; 719 newaddr = 0; 720 } 721 722 static void 723 notealias(const char *addr, int param, int s, const struct afswtch *afp) 724 { 725 #define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr)) 726 if (setaddr && doalias == 0 && param < 0) 727 if (afp->af_addreq != NULL && afp->af_ridreq != NULL) 728 bcopy((caddr_t)rqtosa(af_addreq), 729 (caddr_t)rqtosa(af_ridreq), 730 rqtosa(af_addreq)->sa_len); 731 doalias = param; 732 if (param < 0) { 733 clearaddr = 1; 734 newaddr = 0; 735 } else 736 clearaddr = 0; 737 #undef rqtosa 738 } 739 740 /*ARGSUSED*/ 741 static void 742 setifdstaddr(const char *addr, int param __unused, int s, 743 const struct afswtch *afp) 744 { 745 if (afp->af_getaddr != NULL) 746 afp->af_getaddr(addr, DSTADDR); 747 } 748 749 /* 750 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion 751 * of the ifreq structure, which may confuse other parts of ifconfig. 752 * Make a private copy so we can avoid that. 753 */ 754 static void 755 setifflags(const char *vname, int value, int s, const struct afswtch *afp) 756 { 757 struct ifreq my_ifr; 758 759 bcopy((char *)&ifr, (char *)&my_ifr, sizeof(struct ifreq)); 760 761 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) { 762 Perror("ioctl (SIOCGIFFLAGS)"); 763 exit(1); 764 } 765 strncpy(my_ifr.ifr_name, name, sizeof (my_ifr.ifr_name)); 766 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16); 767 768 if (value < 0) { 769 value = -value; 770 flags &= ~value; 771 } else 772 flags |= value; 773 my_ifr.ifr_flags = flags & 0xffff; 774 my_ifr.ifr_flagshigh = flags >> 16; 775 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0) 776 Perror(vname); 777 } 778 779 void 780 setifcap(const char *vname, int value, int s, const struct afswtch *afp) 781 { 782 783 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) { 784 Perror("ioctl (SIOCGIFCAP)"); 785 exit(1); 786 } 787 flags = ifr.ifr_curcap; 788 if (value < 0) { 789 value = -value; 790 flags &= ~value; 791 } else 792 flags |= value; 793 ifr.ifr_reqcap = flags; 794 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0) 795 Perror(vname); 796 } 797 798 static void 799 setifmetric(const char *val, int dummy __unused, int s, 800 const struct afswtch *afp) 801 { 802 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 803 ifr.ifr_metric = atoi(val); 804 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0) 805 warn("ioctl (set metric)"); 806 } 807 808 static void 809 setifmtu(const char *val, int dummy __unused, int s, 810 const struct afswtch *afp) 811 { 812 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 813 ifr.ifr_mtu = atoi(val); 814 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0) 815 warn("ioctl (set mtu)"); 816 } 817 818 static void 819 setifname(const char *val, int dummy __unused, int s, 820 const struct afswtch *afp) 821 { 822 char *newname; 823 824 newname = strdup(val); 825 if (newname == NULL) { 826 warn("no memory to set ifname"); 827 return; 828 } 829 ifr.ifr_data = newname; 830 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 831 warn("ioctl (set name)"); 832 free(newname); 833 return; 834 } 835 strlcpy(name, newname, sizeof(name)); 836 free(newname); 837 838 /* 839 * Even if we just created the interface, we don't need to print 840 * its name because we just nailed it down separately. 841 */ 842 printname = 0; 843 } 844 845 static void 846 setifpollcpu(const char *val, int dummy __unused, int s, 847 const struct afswtch *afp) 848 { 849 int pollcpu; 850 851 pollcpu = atoi(val); 852 if (pollcpu < 0) { 853 warn("pollcpu < 0"); 854 return; 855 } 856 857 setifflags("-polling", -IFF_POLLING, s, afp); 858 859 ifr.ifr_pollcpu = pollcpu; 860 if (ioctl(s, SIOCSIFPOLLCPU, (caddr_t)&ifr) < 0) { 861 warn("ioctl (set pollcpu)"); 862 return; 863 } 864 } 865 866 /* 867 * Expand the compacted form of addresses as returned via the 868 * configuration read via sysctl(). 869 */ 870 static void 871 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) 872 { 873 struct sockaddr *sa; 874 int i; 875 876 memset(rtinfo->rti_info, 0, sizeof(rtinfo->rti_info)); 877 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 878 if ((rtinfo->rti_addrs & (1 << i)) == 0) 879 continue; 880 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 881 cp += SA_SIZE(sa); 882 } 883 } 884 885 #define IFFBITS \ 886 "\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \ 887 "\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ 888 "\20MULTICAST\21POLLING\22PPROMISC\23MONITOR\24STATICARP\25NPOLLING" 889 890 #define IFCAPBITS \ 891 "\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7RSS" 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 afp = af_getbyname("inet"); 908 } else 909 allfamilies = 0; 910 911 ifr.ifr_addr.sa_family = afp->af_af == AF_LINK ? AF_INET : afp->af_af; 912 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 913 914 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0); 915 if (s < 0) 916 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 917 918 printf("%s: ", name); 919 printb("flags", flags, IFFBITS); 920 if (ifm->ifm_data.ifi_metric) 921 printf(" metric %ld", ifm->ifm_data.ifi_metric); 922 if (ifm->ifm_data.ifi_mtu) 923 printf(" mtu %ld", ifm->ifm_data.ifi_mtu); 924 putchar('\n'); 925 926 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) { 927 if (ifr.ifr_curcap != 0) { 928 printb("\toptions", ifr.ifr_curcap, IFCAPBITS); 929 putchar('\n'); 930 } 931 if (supmedia && ifr.ifr_reqcap != 0) { 932 printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS); 933 putchar('\n'); 934 } 935 } 936 937 tunnel_status(s); 938 939 while (addrcount > 0) { 940 info.rti_addrs = ifam->ifam_addrs; 941 /* Expand the compacted addresses */ 942 rt_xaddrs((char *)(ifam + 1), ifam->ifam_msglen + (char *)ifam, 943 &info); 944 945 if (allfamilies) { 946 const struct afswtch *p; 947 p = af_getbyfamily(info.rti_info[RTAX_IFA]->sa_family); 948 if (p != NULL && p->af_status != NULL) 949 p->af_status(s, &info); 950 } else if (afp->af_af == info.rti_info[RTAX_IFA]->sa_family) 951 afp->af_status(s, &info); 952 addrcount--; 953 ifam = (struct ifa_msghdr *)((char *)ifam + ifam->ifam_msglen); 954 } 955 if (allfamilies || afp->af_af == AF_LINK) { 956 const struct afswtch *lafp; 957 958 /* 959 * Hack; the link level address is received separately 960 * from the routing information so any address is not 961 * handled above. Cobble together an entry and invoke 962 * the status method specially. 963 */ 964 lafp = af_getbyname("lladdr"); 965 if (lafp != NULL) { 966 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; 967 lafp->af_status(s, &info); 968 } 969 } 970 if (allfamilies) 971 af_other_status(s); 972 else if (afp->af_other_status != NULL) 973 afp->af_other_status(s); 974 975 strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name); 976 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0) 977 printf("%s", ifs.ascii); 978 979 if (flags & IFF_POLLING) { 980 if (ioctl(s, SIOCGIFPOLLCPU, &ifr) == 0 && ifr.ifr_pollcpu >= 0) 981 printf("\tpollcpu: %d\n", ifr.ifr_pollcpu); 982 } 983 984 close(s); 985 return; 986 } 987 988 static void 989 tunnel_status(int s) 990 { 991 af_all_tunnel_status(s); 992 } 993 994 void 995 Perror(const char *cmd) 996 { 997 switch (errno) { 998 999 case ENXIO: 1000 errx(1, "%s: no such interface", cmd); 1001 break; 1002 1003 case EPERM: 1004 errx(1, "%s: permission denied", cmd); 1005 break; 1006 1007 default: 1008 err(1, "%s", cmd); 1009 } 1010 } 1011 1012 /* 1013 * Print a value a la the %b format of the kernel's printf 1014 */ 1015 void 1016 printb(const char *s, unsigned v, const char *bits) 1017 { 1018 int i, any = 0; 1019 char c; 1020 1021 if (bits && *bits == 8) 1022 printf("%s=%o", s, v); 1023 else 1024 printf("%s=%x", s, v); 1025 bits++; 1026 if (bits) { 1027 putchar('<'); 1028 while ((i = *bits++) != '\0') { 1029 if (v & (1 << (i-1))) { 1030 if (any) 1031 putchar(','); 1032 any = 1; 1033 for (; (c = *bits) > 32; bits++) 1034 putchar(c); 1035 } else 1036 for (; *bits > 32; bits++) 1037 ; 1038 } 1039 putchar('>'); 1040 } 1041 } 1042 1043 void 1044 ifmaybeload(const char *name) 1045 { 1046 struct module_stat mstat; 1047 int fileid, modid; 1048 char ifkind[35], *dp; 1049 const char *cp; 1050 1051 /* turn interface and unit into module name */ 1052 strcpy(ifkind, "if_"); 1053 for (cp = name, dp = ifkind + 3; 1054 (*cp != 0) && !isdigit(*cp); cp++, dp++) 1055 *dp = *cp; 1056 *dp = 0; 1057 1058 /* scan files in kernel */ 1059 mstat.version = sizeof(struct module_stat); 1060 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { 1061 /* scan modules in file */ 1062 for (modid = kldfirstmod(fileid); modid > 0; 1063 modid = modfnext(modid)) { 1064 if (modstat(modid, &mstat) < 0) 1065 continue; 1066 /* strip bus name if present */ 1067 if ((cp = strchr(mstat.name, '/')) != NULL) { 1068 cp++; 1069 } else { 1070 cp = mstat.name; 1071 } 1072 /* already loaded? */ 1073 if (strncmp(name, cp, strlen(cp)) == 0 || 1074 strncmp(ifkind, cp, strlen(cp)) == 0) 1075 return; 1076 } 1077 } 1078 1079 /* not present, we should try to load it */ 1080 kldload(ifkind); 1081 } 1082 1083 static struct cmd basic_cmds[] = { 1084 DEF_CMD("up", IFF_UP, setifflags), 1085 DEF_CMD("down", -IFF_UP, setifflags), 1086 DEF_CMD("arp", -IFF_NOARP, setifflags), 1087 DEF_CMD("-arp", IFF_NOARP, setifflags), 1088 DEF_CMD("debug", IFF_DEBUG, setifflags), 1089 DEF_CMD("-debug", -IFF_DEBUG, setifflags), 1090 DEF_CMD("promisc", IFF_PPROMISC, setifflags), 1091 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags), 1092 DEF_CMD("add", IFF_UP, notealias), 1093 DEF_CMD("alias", IFF_UP, notealias), 1094 DEF_CMD("-alias", -IFF_UP, notealias), 1095 DEF_CMD("delete", -IFF_UP, notealias), 1096 DEF_CMD("remove", -IFF_UP, notealias), 1097 #ifdef notdef 1098 #define EN_SWABIPS 0x1000 1099 DEF_CMD("swabips", EN_SWABIPS, setifflags), 1100 DEF_CMD("-swabips", -EN_SWABIPS, setifflags), 1101 #endif 1102 DEF_CMD_ARG("netmask", setifnetmask), 1103 DEF_CMD_ARG("metric", setifmetric), 1104 DEF_CMD_ARG("broadcast", setifbroadaddr), 1105 #ifndef NO_IPX 1106 DEF_CMD_ARG("ipdst", setifipdst), 1107 #endif 1108 DEF_CMD_ARG2("tunnel", settunnel), 1109 DEF_CMD("-tunnel", 0, deletetunnel), 1110 DEF_CMD("deletetunnel", 0, deletetunnel), 1111 DEF_CMD("link0", IFF_LINK0, setifflags), 1112 DEF_CMD("-link0", -IFF_LINK0, setifflags), 1113 DEF_CMD("link1", IFF_LINK1, setifflags), 1114 DEF_CMD("-link1", -IFF_LINK1, setifflags), 1115 DEF_CMD("link2", IFF_LINK2, setifflags), 1116 DEF_CMD("-link2", -IFF_LINK2, setifflags), 1117 DEF_CMD("monitor", IFF_MONITOR, setifflags), 1118 DEF_CMD("-monitor", -IFF_MONITOR, setifflags), 1119 DEF_CMD("staticarp", IFF_STATICARP, setifflags), 1120 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), 1121 DEF_CMD("polling", IFF_POLLING, setifflags), 1122 DEF_CMD("-polling", -IFF_POLLING, setifflags), 1123 DEF_CMD("npolling", IFF_NPOLLING, setifflags), 1124 DEF_CMD("-npolling", -IFF_NPOLLING, setifflags), 1125 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), 1126 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), 1127 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), 1128 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), 1129 DEF_CMD("netcons", IFCAP_NETCONS, setifcap), 1130 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), 1131 DEF_CMD("rss", IFCAP_RSS, setifcap), 1132 DEF_CMD("-rss", -IFCAP_RSS, 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 }; 1140 1141 static __constructor void 1142 ifconfig_ctor(void) 1143 { 1144 #define N(a) (sizeof(a) / sizeof(a[0])) 1145 int i; 1146 1147 for (i = 0; i < N(basic_cmds); i++) 1148 cmd_register(&basic_cmds[i]); 1149 #undef N 1150 } 1151