ifconfig.c revision 300285
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 30#ifndef lint 31static const char copyright[] = 32"@(#) Copyright (c) 1983, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34#endif /* not lint */ 35 36#ifndef lint 37#if 0 38static char sccsid[] = "@(#)ifconfig.c 8.2 (Berkeley) 2/16/94"; 39#endif 40static const char rcsid[] = 41 "$FreeBSD: stable/10/sbin/ifconfig/ifconfig.c 300285 2016-05-20 07:14:03Z truckman $"; 42#endif /* not lint */ 43 44#include <sys/param.h> 45#include <sys/ioctl.h> 46#include <sys/module.h> 47#include <sys/linker.h> 48#include <sys/socket.h> 49#include <sys/time.h> 50 51#include <net/ethernet.h> 52#include <net/if.h> 53#include <net/if_var.h> 54#include <net/if_dl.h> 55#include <net/if_types.h> 56#include <net/route.h> 57 58/* IP */ 59#include <netinet/in.h> 60#include <netinet/in_var.h> 61#include <arpa/inet.h> 62#include <netdb.h> 63 64#include <ifaddrs.h> 65#include <ctype.h> 66#include <err.h> 67#include <errno.h> 68#include <fcntl.h> 69#ifdef JAIL 70#include <jail.h> 71#endif 72#include <stdio.h> 73#include <stdlib.h> 74#include <string.h> 75#include <unistd.h> 76 77#include "ifconfig.h" 78 79/* 80 * Since "struct ifreq" is composed of various union members, callers 81 * should pay special attention to interpret the value. 82 * (.e.g. little/big endian difference in the structure.) 83 */ 84struct ifreq ifr; 85 86char name[IFNAMSIZ]; 87char *descr = NULL; 88size_t descrlen = 64; 89int setaddr; 90int setmask; 91int doalias; 92int clearaddr; 93int newaddr = 1; 94int verbose; 95int noload; 96int printifname = 0; 97 98int supmedia = 0; 99int printkeys = 0; /* Print keying material for interfaces. */ 100 101static int ifconfig(int argc, char *const *argv, int iscreate, 102 const struct afswtch *afp); 103static void status(const struct afswtch *afp, const struct sockaddr_dl *sdl, 104 struct ifaddrs *ifa); 105static void tunnel_status(int s); 106static void usage(void); 107 108static struct afswtch *af_getbyname(const char *name); 109static struct afswtch *af_getbyfamily(int af); 110static void af_other_status(int); 111 112void printifnamemaybe(void); 113 114static struct option *opts = NULL; 115 116void 117opt_register(struct option *p) 118{ 119 p->next = opts; 120 opts = p; 121} 122 123static void 124usage(void) 125{ 126 char options[1024]; 127 struct option *p; 128 129 /* XXX not right but close enough for now */ 130 options[0] = '\0'; 131 for (p = opts; p != NULL; p = p->next) { 132 strlcat(options, p->opt_usage, sizeof(options)); 133 strlcat(options, " ", sizeof(options)); 134 } 135 136 fprintf(stderr, 137 "usage: ifconfig %sinterface address_family [address [dest_address]]\n" 138 " [parameters]\n" 139 " ifconfig interface create\n" 140 " ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n" 141 " ifconfig -l [-d] [-u] [address_family]\n" 142 " ifconfig %s[-d] [-m] [-u] [-v]\n", 143 options, options, options); 144 exit(1); 145} 146 147void printifnamemaybe() 148{ 149 if (printifname) 150 printf("%s\n", name); 151} 152 153int 154main(int argc, char *argv[]) 155{ 156 int c, all, namesonly, downonly, uponly; 157 const struct afswtch *afp = NULL; 158 int ifindex; 159 struct ifaddrs *ifap, *ifa; 160 struct ifreq paifr; 161 const struct sockaddr_dl *sdl; 162 char options[1024], *cp, *namecp = NULL; 163 const char *ifname; 164 struct option *p; 165 size_t iflen; 166 167 all = downonly = uponly = namesonly = noload = verbose = 0; 168 169 /* 170 * Ensure we print interface name when expected to, 171 * even if we terminate early due to error. 172 */ 173 atexit(printifnamemaybe); 174 175 /* Parse leading line options */ 176 strlcpy(options, "adklmnuv", sizeof(options)); 177 for (p = opts; p != NULL; p = p->next) 178 strlcat(options, p->opt, sizeof(options)); 179 while ((c = getopt(argc, argv, options)) != -1) { 180 switch (c) { 181 case 'a': /* scan all interfaces */ 182 all++; 183 break; 184 case 'd': /* restrict scan to "down" interfaces */ 185 downonly++; 186 break; 187 case 'k': 188 printkeys++; 189 break; 190 case 'l': /* scan interface names only */ 191 namesonly++; 192 break; 193 case 'm': /* show media choices in status */ 194 supmedia = 1; 195 break; 196 case 'n': /* suppress module loading */ 197 noload++; 198 break; 199 case 'u': /* restrict scan to "up" interfaces */ 200 uponly++; 201 break; 202 case 'v': 203 verbose++; 204 break; 205 default: 206 for (p = opts; p != NULL; p = p->next) 207 if (p->opt[0] == c) { 208 p->cb(optarg); 209 break; 210 } 211 if (p == NULL) 212 usage(); 213 break; 214 } 215 } 216 argc -= optind; 217 argv += optind; 218 219 /* -l cannot be used with -a or -m */ 220 if (namesonly && (all || supmedia)) 221 usage(); 222 223 /* nonsense.. */ 224 if (uponly && downonly) 225 usage(); 226 227 /* no arguments is equivalent to '-a' */ 228 if (!namesonly && argc < 1) 229 all = 1; 230 231 /* -a and -l allow an address family arg to limit the output */ 232 if (all || namesonly) { 233 if (argc > 1) 234 usage(); 235 236 ifname = NULL; 237 ifindex = 0; 238 if (argc == 1) { 239 afp = af_getbyname(*argv); 240 if (afp == NULL) { 241 warnx("Address family '%s' unknown.", *argv); 242 usage(); 243 } 244 if (afp->af_name != NULL) 245 argc--, argv++; 246 /* leave with afp non-zero */ 247 } 248 } else { 249 /* not listing, need an argument */ 250 if (argc < 1) 251 usage(); 252 253 ifname = *argv; 254 argc--, argv++; 255 256 /* check and maybe load support for this interface */ 257 ifmaybeload(ifname); 258 259 ifindex = if_nametoindex(ifname); 260 if (ifindex == 0) { 261 /* 262 * NOTE: We must special-case the `create' command 263 * right here as we would otherwise fail when trying 264 * to find the interface. 265 */ 266 if (argc > 0 && (strcmp(argv[0], "create") == 0 || 267 strcmp(argv[0], "plumb") == 0)) { 268 iflen = strlcpy(name, ifname, sizeof(name)); 269 if (iflen >= sizeof(name)) 270 errx(1, "%s: cloning name too long", 271 ifname); 272 ifconfig(argc, argv, 1, NULL); 273 exit(0); 274 } 275#ifdef JAIL 276 /* 277 * NOTE: We have to special-case the `-vnet' command 278 * right here as we would otherwise fail when trying 279 * to find the interface as it lives in another vnet. 280 */ 281 if (argc > 0 && (strcmp(argv[0], "-vnet") == 0)) { 282 iflen = strlcpy(name, ifname, sizeof(name)); 283 if (iflen >= sizeof(name)) 284 errx(1, "%s: interface name too long", 285 ifname); 286 ifconfig(argc, argv, 0, NULL); 287 exit(0); 288 } 289#endif 290 errx(1, "interface %s does not exist", ifname); 291 } 292 } 293 294 /* Check for address family */ 295 if (argc > 0) { 296 afp = af_getbyname(*argv); 297 if (afp != NULL) 298 argc--, argv++; 299 } 300 301 if (getifaddrs(&ifap) != 0) 302 err(EXIT_FAILURE, "getifaddrs"); 303 cp = NULL; 304 ifindex = 0; 305 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 306 memset(&paifr, 0, sizeof(paifr)); 307 strlcpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name)); 308 if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) { 309 memcpy(&paifr.ifr_addr, ifa->ifa_addr, 310 ifa->ifa_addr->sa_len); 311 } 312 313 if (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0) 314 continue; 315 if (ifa->ifa_addr->sa_family == AF_LINK) 316 sdl = (const struct sockaddr_dl *) ifa->ifa_addr; 317 else 318 sdl = NULL; 319 if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0 && !namesonly) 320 continue; 321 iflen = strlcpy(name, ifa->ifa_name, sizeof(name)); 322 if (iflen >= sizeof(name)) { 323 warnx("%s: interface name too long, skipping", 324 ifa->ifa_name); 325 continue; 326 } 327 cp = ifa->ifa_name; 328 329 if ((ifa->ifa_flags & IFF_CANTCONFIG) != 0) 330 continue; 331 if (downonly && (ifa->ifa_flags & IFF_UP) != 0) 332 continue; 333 if (uponly && (ifa->ifa_flags & IFF_UP) == 0) 334 continue; 335 /* 336 * Are we just listing the interfaces? 337 */ 338 if (namesonly) { 339 if (namecp == cp) 340 continue; 341 if (afp != NULL) { 342 /* special case for "ether" address family */ 343 if (!strcmp(afp->af_name, "ether")) { 344 if (sdl == NULL || 345 (sdl->sdl_type != IFT_ETHER && 346 sdl->sdl_type != IFT_L2VLAN && 347 sdl->sdl_type != IFT_BRIDGE) || 348 sdl->sdl_alen != ETHER_ADDR_LEN) 349 continue; 350 } else { 351 if (ifa->ifa_addr->sa_family != afp->af_af) 352 continue; 353 } 354 } 355 namecp = cp; 356 ifindex++; 357 if (ifindex > 1) 358 printf(" "); 359 fputs(name, stdout); 360 continue; 361 } 362 ifindex++; 363 364 if (argc > 0) 365 ifconfig(argc, argv, 0, afp); 366 else 367 status(afp, sdl, ifa); 368 } 369 if (namesonly) 370 printf("\n"); 371 freeifaddrs(ifap); 372 373 exit(0); 374} 375 376static struct afswtch *afs = NULL; 377 378void 379af_register(struct afswtch *p) 380{ 381 p->af_next = afs; 382 afs = p; 383} 384 385static struct afswtch * 386af_getbyname(const char *name) 387{ 388 struct afswtch *afp; 389 390 for (afp = afs; afp != NULL; afp = afp->af_next) 391 if (strcmp(afp->af_name, name) == 0) 392 return afp; 393 return NULL; 394} 395 396static struct afswtch * 397af_getbyfamily(int af) 398{ 399 struct afswtch *afp; 400 401 for (afp = afs; afp != NULL; afp = afp->af_next) 402 if (afp->af_af == af) 403 return afp; 404 return NULL; 405} 406 407static void 408af_other_status(int s) 409{ 410 struct afswtch *afp; 411 uint8_t afmask[howmany(AF_MAX, NBBY)]; 412 413 memset(afmask, 0, sizeof(afmask)); 414 for (afp = afs; afp != NULL; afp = afp->af_next) { 415 if (afp->af_other_status == NULL) 416 continue; 417 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 418 continue; 419 afp->af_other_status(s); 420 setbit(afmask, afp->af_af); 421 } 422} 423 424static void 425af_all_tunnel_status(int s) 426{ 427 struct afswtch *afp; 428 uint8_t afmask[howmany(AF_MAX, NBBY)]; 429 430 memset(afmask, 0, sizeof(afmask)); 431 for (afp = afs; afp != NULL; afp = afp->af_next) { 432 if (afp->af_status_tunnel == NULL) 433 continue; 434 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 435 continue; 436 afp->af_status_tunnel(s); 437 setbit(afmask, afp->af_af); 438 } 439} 440 441static struct cmd *cmds = NULL; 442 443void 444cmd_register(struct cmd *p) 445{ 446 p->c_next = cmds; 447 cmds = p; 448} 449 450static const struct cmd * 451cmd_lookup(const char *name, int iscreate) 452{ 453 const struct cmd *p; 454 455 for (p = cmds; p != NULL; p = p->c_next) 456 if (strcmp(name, p->c_name) == 0) { 457 if (iscreate) { 458 if (p->c_iscloneop) 459 return p; 460 } else { 461 if (!p->c_iscloneop) 462 return p; 463 } 464 } 465 return NULL; 466} 467 468struct callback { 469 callback_func *cb_func; 470 void *cb_arg; 471 struct callback *cb_next; 472}; 473static struct callback *callbacks = NULL; 474 475void 476callback_register(callback_func *func, void *arg) 477{ 478 struct callback *cb; 479 480 cb = malloc(sizeof(struct callback)); 481 if (cb == NULL) 482 errx(1, "unable to allocate memory for callback"); 483 cb->cb_func = func; 484 cb->cb_arg = arg; 485 cb->cb_next = callbacks; 486 callbacks = cb; 487} 488 489/* specially-handled commands */ 490static void setifaddr(const char *, int, int, const struct afswtch *); 491static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr); 492 493static void setifdstaddr(const char *, int, int, const struct afswtch *); 494static const struct cmd setifdstaddr_cmd = 495 DEF_CMD("ifdstaddr", 0, setifdstaddr); 496 497static int 498ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *uafp) 499{ 500 const struct afswtch *afp, *nafp; 501 const struct cmd *p; 502 struct callback *cb; 503 int s; 504 505 strlcpy(ifr.ifr_name, name, sizeof ifr.ifr_name); 506 afp = NULL; 507 if (uafp != NULL) 508 afp = uafp; 509 /* 510 * This is the historical "accident" allowing users to configure IPv4 511 * addresses without the "inet" keyword which while a nice feature has 512 * proven to complicate other things. We cannot remove this but only 513 * make sure we will never have a similar implicit default for IPv6 or 514 * any other address familiy. We need a fallback though for 515 * ifconfig IF up/down etc. to work without INET support as people 516 * never used ifconfig IF link up/down, etc. either. 517 */ 518#ifndef RESCUE 519#ifdef INET 520 if (afp == NULL && feature_present("inet")) 521 afp = af_getbyname("inet"); 522#endif 523#endif 524 if (afp == NULL) 525 afp = af_getbyname("link"); 526 if (afp == NULL) { 527 warnx("Please specify an address_family."); 528 usage(); 529 } 530top: 531 ifr.ifr_addr.sa_family = 532 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ? 533 AF_LOCAL : afp->af_af; 534 535 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 && 536 (uafp != NULL || errno != EAFNOSUPPORT || 537 (s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0)) 538 err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family); 539 540 while (argc > 0) { 541 p = cmd_lookup(*argv, iscreate); 542 if (iscreate && p == NULL) { 543 /* 544 * Push the clone create callback so the new 545 * device is created and can be used for any 546 * remaining arguments. 547 */ 548 cb = callbacks; 549 if (cb == NULL) 550 errx(1, "internal error, no callback"); 551 callbacks = cb->cb_next; 552 cb->cb_func(s, cb->cb_arg); 553 iscreate = 0; 554 /* 555 * Handle any address family spec that 556 * immediately follows and potentially 557 * recreate the socket. 558 */ 559 nafp = af_getbyname(*argv); 560 if (nafp != NULL) { 561 argc--, argv++; 562 if (nafp != afp) { 563 close(s); 564 afp = nafp; 565 goto top; 566 } 567 } 568 /* 569 * Look for a normal parameter. 570 */ 571 continue; 572 } 573 if (p == NULL) { 574 /* 575 * Not a recognized command, choose between setting 576 * the interface address and the dst address. 577 */ 578 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd); 579 } 580 if (p->c_u.c_func || p->c_u.c_func2) { 581 if (p->c_parameter == NEXTARG) { 582 if (argv[1] == NULL) 583 errx(1, "'%s' requires argument", 584 p->c_name); 585 p->c_u.c_func(argv[1], 0, s, afp); 586 argc--, argv++; 587 } else if (p->c_parameter == OPTARG) { 588 p->c_u.c_func(argv[1], 0, s, afp); 589 if (argv[1] != NULL) 590 argc--, argv++; 591 } else if (p->c_parameter == NEXTARG2) { 592 if (argc < 3) 593 errx(1, "'%s' requires 2 arguments", 594 p->c_name); 595 p->c_u.c_func2(argv[1], argv[2], s, afp); 596 argc -= 2, argv += 2; 597 } else 598 p->c_u.c_func(*argv, p->c_parameter, s, afp); 599 } 600 argc--, argv++; 601 } 602 603 /* 604 * Do any post argument processing required by the address family. 605 */ 606 if (afp->af_postproc != NULL) 607 afp->af_postproc(s, afp); 608 /* 609 * Do deferred callbacks registered while processing 610 * command-line arguments. 611 */ 612 for (cb = callbacks; cb != NULL; cb = cb->cb_next) 613 cb->cb_func(s, cb->cb_arg); 614 /* 615 * Do deferred operations. 616 */ 617 if (clearaddr) { 618 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) { 619 warnx("interface %s cannot change %s addresses!", 620 name, afp->af_name); 621 clearaddr = 0; 622 } 623 } 624 if (clearaddr) { 625 int ret; 626 strlcpy(((struct ifreq *)afp->af_ridreq)->ifr_name, name, 627 sizeof ifr.ifr_name); 628 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq); 629 if (ret < 0) { 630 if (errno == EADDRNOTAVAIL && (doalias >= 0)) { 631 /* means no previous address for interface */ 632 } else 633 Perror("ioctl (SIOCDIFADDR)"); 634 } 635 } 636 if (newaddr) { 637 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) { 638 warnx("interface %s cannot change %s addresses!", 639 name, afp->af_name); 640 newaddr = 0; 641 } 642 } 643 if (newaddr && (setaddr || setmask)) { 644 strlcpy(((struct ifreq *)afp->af_addreq)->ifr_name, name, 645 sizeof ifr.ifr_name); 646 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0) 647 Perror("ioctl (SIOCAIFADDR)"); 648 } 649 650 close(s); 651 return(0); 652} 653 654/*ARGSUSED*/ 655static void 656setifaddr(const char *addr, int param, int s, const struct afswtch *afp) 657{ 658 if (afp->af_getaddr == NULL) 659 return; 660 /* 661 * Delay the ioctl to set the interface addr until flags are all set. 662 * The address interpretation may depend on the flags, 663 * and the flags may change when the address is set. 664 */ 665 setaddr++; 666 if (doalias == 0 && afp->af_af != AF_LINK) 667 clearaddr = 1; 668 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); 669} 670 671static void 672settunnel(const char *src, const char *dst, int s, const struct afswtch *afp) 673{ 674 struct addrinfo *srcres, *dstres; 675 int ecode; 676 677 if (afp->af_settunnel == NULL) { 678 warn("address family %s does not support tunnel setup", 679 afp->af_name); 680 return; 681 } 682 683 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) 684 errx(1, "error in parsing address string: %s", 685 gai_strerror(ecode)); 686 687 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) 688 errx(1, "error in parsing address string: %s", 689 gai_strerror(ecode)); 690 691 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 692 errx(1, 693 "source and destination address families do not match"); 694 695 afp->af_settunnel(s, srcres, dstres); 696 697 freeaddrinfo(srcres); 698 freeaddrinfo(dstres); 699} 700 701/* ARGSUSED */ 702static void 703deletetunnel(const char *vname, int param, int s, const struct afswtch *afp) 704{ 705 706 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0) 707 err(1, "SIOCDIFPHYADDR"); 708} 709 710#ifdef JAIL 711static void 712setifvnet(const char *jname, int dummy __unused, int s, 713 const struct afswtch *afp) 714{ 715 struct ifreq my_ifr; 716 717 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 718 my_ifr.ifr_jid = jail_getid(jname); 719 if (my_ifr.ifr_jid < 0) 720 errx(1, "%s", jail_errmsg); 721 if (ioctl(s, SIOCSIFVNET, &my_ifr) < 0) 722 err(1, "SIOCSIFVNET"); 723} 724 725static void 726setifrvnet(const char *jname, int dummy __unused, int s, 727 const struct afswtch *afp) 728{ 729 struct ifreq my_ifr; 730 731 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 732 my_ifr.ifr_jid = jail_getid(jname); 733 if (my_ifr.ifr_jid < 0) 734 errx(1, "%s", jail_errmsg); 735 if (ioctl(s, SIOCSIFRVNET, &my_ifr) < 0) 736 err(1, "SIOCSIFRVNET(%d, %s)", my_ifr.ifr_jid, my_ifr.ifr_name); 737} 738#endif 739 740static void 741setifnetmask(const char *addr, int dummy __unused, int s, 742 const struct afswtch *afp) 743{ 744 if (afp->af_getaddr != NULL) { 745 setmask++; 746 afp->af_getaddr(addr, MASK); 747 } 748} 749 750static void 751setifbroadaddr(const char *addr, int dummy __unused, int s, 752 const struct afswtch *afp) 753{ 754 if (afp->af_getaddr != NULL) 755 afp->af_getaddr(addr, DSTADDR); 756} 757 758static void 759setifipdst(const char *addr, int dummy __unused, int s, 760 const struct afswtch *afp) 761{ 762 const struct afswtch *inet; 763 764 inet = af_getbyname("inet"); 765 if (inet == NULL) 766 return; 767 inet->af_getaddr(addr, DSTADDR); 768 clearaddr = 0; 769 newaddr = 0; 770} 771 772static void 773notealias(const char *addr, int param, int s, const struct afswtch *afp) 774{ 775#define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr)) 776 if (setaddr && doalias == 0 && param < 0) 777 if (afp->af_addreq != NULL && afp->af_ridreq != NULL) 778 bcopy((caddr_t)rqtosa(af_addreq), 779 (caddr_t)rqtosa(af_ridreq), 780 rqtosa(af_addreq)->sa_len); 781 doalias = param; 782 if (param < 0) { 783 clearaddr = 1; 784 newaddr = 0; 785 } else 786 clearaddr = 0; 787#undef rqtosa 788} 789 790/*ARGSUSED*/ 791static void 792setifdstaddr(const char *addr, int param __unused, int s, 793 const struct afswtch *afp) 794{ 795 if (afp->af_getaddr != NULL) 796 afp->af_getaddr(addr, DSTADDR); 797} 798 799/* 800 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion 801 * of the ifreq structure, which may confuse other parts of ifconfig. 802 * Make a private copy so we can avoid that. 803 */ 804static void 805setifflags(const char *vname, int value, int s, const struct afswtch *afp) 806{ 807 struct ifreq my_ifr; 808 int flags; 809 810 memset(&my_ifr, 0, sizeof(my_ifr)); 811 (void) strlcpy(my_ifr.ifr_name, name, sizeof(my_ifr.ifr_name)); 812 813 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) { 814 Perror("ioctl (SIOCGIFFLAGS)"); 815 exit(1); 816 } 817 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16); 818 819 if (value < 0) { 820 value = -value; 821 flags &= ~value; 822 } else 823 flags |= value; 824 my_ifr.ifr_flags = flags & 0xffff; 825 my_ifr.ifr_flagshigh = flags >> 16; 826 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0) 827 Perror(vname); 828} 829 830void 831setifcap(const char *vname, int value, int s, const struct afswtch *afp) 832{ 833 int flags; 834 835 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) { 836 Perror("ioctl (SIOCGIFCAP)"); 837 exit(1); 838 } 839 flags = ifr.ifr_curcap; 840 if (value < 0) { 841 value = -value; 842 flags &= ~value; 843 } else 844 flags |= value; 845 flags &= ifr.ifr_reqcap; 846 ifr.ifr_reqcap = flags; 847 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0) 848 Perror(vname); 849} 850 851static void 852setifmetric(const char *val, int dummy __unused, int s, 853 const struct afswtch *afp) 854{ 855 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 856 ifr.ifr_metric = atoi(val); 857 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0) 858 err(1, "ioctl SIOCSIFMETRIC (set metric)"); 859} 860 861static void 862setifmtu(const char *val, int dummy __unused, int s, 863 const struct afswtch *afp) 864{ 865 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 866 ifr.ifr_mtu = atoi(val); 867 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0) 868 err(1, "ioctl SIOCSIFMTU (set mtu)"); 869} 870 871static void 872setifname(const char *val, int dummy __unused, int s, 873 const struct afswtch *afp) 874{ 875 char *newname; 876 877 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 878 879 newname = strdup(val); 880 if (newname == NULL) 881 err(1, "no memory to set ifname"); 882 ifr.ifr_data = newname; 883 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 884 free(newname); 885 err(1, "ioctl SIOCSIFNAME (set name)"); 886 } 887 printifname = 1; 888 strlcpy(name, newname, sizeof(name)); 889 free(newname); 890} 891 892/* ARGSUSED */ 893static void 894setifdescr(const char *val, int dummy __unused, int s, 895 const struct afswtch *afp) 896{ 897 char *newdescr; 898 899 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 900 901 ifr.ifr_buffer.length = strlen(val) + 1; 902 if (ifr.ifr_buffer.length == 1) { 903 ifr.ifr_buffer.buffer = newdescr = NULL; 904 ifr.ifr_buffer.length = 0; 905 } else { 906 newdescr = strdup(val); 907 ifr.ifr_buffer.buffer = newdescr; 908 if (newdescr == NULL) { 909 warn("no memory to set ifdescr"); 910 return; 911 } 912 } 913 914 if (ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) 915 err(1, "ioctl SIOCSIFDESCR (set descr)"); 916 917 free(newdescr); 918} 919 920/* ARGSUSED */ 921static void 922unsetifdescr(const char *val, int value, int s, const struct afswtch *afp) 923{ 924 925 setifdescr("", 0, s, 0); 926} 927 928#define IFFBITS \ 929"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \ 930"\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ 931"\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP" 932 933#define IFCAPBITS \ 934"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \ 935"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \ 936"\17TOE4\20TOE6\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE\25NETMAP" \ 937"\26RXCSUM_IPV6\27TXCSUM_IPV6" 938 939/* 940 * Print the status of the interface. If an address family was 941 * specified, show only it; otherwise, show them all. 942 */ 943static void 944status(const struct afswtch *afp, const struct sockaddr_dl *sdl, 945 struct ifaddrs *ifa) 946{ 947 struct ifaddrs *ift; 948 int allfamilies, s; 949 struct ifstat ifs; 950 951 if (afp == NULL) { 952 allfamilies = 1; 953 ifr.ifr_addr.sa_family = AF_LOCAL; 954 } else { 955 allfamilies = 0; 956 ifr.ifr_addr.sa_family = 957 afp->af_af == AF_LINK ? AF_LOCAL : afp->af_af; 958 } 959 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 960 961 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0); 962 if (s < 0) 963 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 964 965 printf("%s: ", name); 966 printb("flags", ifa->ifa_flags, IFFBITS); 967 if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1) 968 printf(" metric %d", ifr.ifr_metric); 969 if (ioctl(s, SIOCGIFMTU, &ifr) != -1) 970 printf(" mtu %d", ifr.ifr_mtu); 971 putchar('\n'); 972 973 for (;;) { 974 if ((descr = reallocf(descr, descrlen)) != NULL) { 975 ifr.ifr_buffer.buffer = descr; 976 ifr.ifr_buffer.length = descrlen; 977 if (ioctl(s, SIOCGIFDESCR, &ifr) == 0) { 978 if (ifr.ifr_buffer.buffer == descr) { 979 if (strlen(descr) > 0) 980 printf("\tdescription: %s\n", 981 descr); 982 } else if (ifr.ifr_buffer.length > descrlen) { 983 descrlen = ifr.ifr_buffer.length; 984 continue; 985 } 986 } 987 } else 988 warn("unable to allocate memory for interface" 989 "description"); 990 break; 991 } 992 993 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) { 994 if (ifr.ifr_curcap != 0) { 995 printb("\toptions", ifr.ifr_curcap, IFCAPBITS); 996 putchar('\n'); 997 } 998 if (supmedia && ifr.ifr_reqcap != 0) { 999 printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS); 1000 putchar('\n'); 1001 } 1002 } 1003 1004 tunnel_status(s); 1005 1006 for (ift = ifa; ift != NULL; ift = ift->ifa_next) { 1007 if (ift->ifa_addr == NULL) 1008 continue; 1009 if (strcmp(ifa->ifa_name, ift->ifa_name) != 0) 1010 continue; 1011 if (allfamilies) { 1012 const struct afswtch *p; 1013 p = af_getbyfamily(ift->ifa_addr->sa_family); 1014 if (p != NULL && p->af_status != NULL) 1015 p->af_status(s, ift); 1016 } else if (afp->af_af == ift->ifa_addr->sa_family) 1017 afp->af_status(s, ift); 1018 } 1019#if 0 1020 if (allfamilies || afp->af_af == AF_LINK) { 1021 const struct afswtch *lafp; 1022 1023 /* 1024 * Hack; the link level address is received separately 1025 * from the routing information so any address is not 1026 * handled above. Cobble together an entry and invoke 1027 * the status method specially. 1028 */ 1029 lafp = af_getbyname("lladdr"); 1030 if (lafp != NULL) { 1031 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; 1032 lafp->af_status(s, &info); 1033 } 1034 } 1035#endif 1036 if (allfamilies) 1037 af_other_status(s); 1038 else if (afp->af_other_status != NULL) 1039 afp->af_other_status(s); 1040 1041 strlcpy(ifs.ifs_name, name, sizeof ifs.ifs_name); 1042 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0) 1043 printf("%s", ifs.ascii); 1044 1045 if (verbose > 0) 1046 sfp_status(s, &ifr, verbose); 1047 1048 close(s); 1049 return; 1050} 1051 1052static void 1053tunnel_status(int s) 1054{ 1055 af_all_tunnel_status(s); 1056} 1057 1058void 1059Perror(const char *cmd) 1060{ 1061 switch (errno) { 1062 1063 case ENXIO: 1064 errx(1, "%s: no such interface", cmd); 1065 break; 1066 1067 case EPERM: 1068 errx(1, "%s: permission denied", cmd); 1069 break; 1070 1071 default: 1072 err(1, "%s", cmd); 1073 } 1074} 1075 1076/* 1077 * Print a value a la the %b format of the kernel's printf 1078 */ 1079void 1080printb(const char *s, unsigned v, const char *bits) 1081{ 1082 int i, any = 0; 1083 char c; 1084 1085 if (bits && *bits == 8) 1086 printf("%s=%o", s, v); 1087 else 1088 printf("%s=%x", s, v); 1089 bits++; 1090 if (bits) { 1091 putchar('<'); 1092 while ((i = *bits++) != '\0') { 1093 if (v & (1 << (i-1))) { 1094 if (any) 1095 putchar(','); 1096 any = 1; 1097 for (; (c = *bits) > 32; bits++) 1098 putchar(c); 1099 } else 1100 for (; *bits > 32; bits++) 1101 ; 1102 } 1103 putchar('>'); 1104 } 1105} 1106 1107void 1108print_vhid(const struct ifaddrs *ifa, const char *s) 1109{ 1110 struct if_data *ifd; 1111 1112 if (ifa->ifa_data == NULL) 1113 return; 1114 1115 ifd = ifa->ifa_data; 1116 if (ifd->ifi_vhid == 0) 1117 return; 1118 1119 printf("vhid %d ", ifd->ifi_vhid); 1120} 1121 1122void 1123ifmaybeload(const char *name) 1124{ 1125#define MOD_PREFIX_LEN 3 /* "if_" */ 1126 struct module_stat mstat; 1127 int fileid, modid; 1128 char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp; 1129 const char *cp; 1130 1131 /* loading suppressed by the user */ 1132 if (noload) 1133 return; 1134 1135 /* trim the interface number off the end */ 1136 strlcpy(ifname, name, sizeof(ifname)); 1137 for (dp = ifname; *dp != 0; dp++) 1138 if (isdigit(*dp)) { 1139 *dp = 0; 1140 break; 1141 } 1142 1143 /* turn interface and unit into module name */ 1144 strlcpy(ifkind, "if_", sizeof(ifkind)); 1145 strlcat(ifkind, ifname, sizeof(ifkind)); 1146 1147 /* scan files in kernel */ 1148 mstat.version = sizeof(struct module_stat); 1149 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { 1150 /* scan modules in file */ 1151 for (modid = kldfirstmod(fileid); modid > 0; 1152 modid = modfnext(modid)) { 1153 if (modstat(modid, &mstat) < 0) 1154 continue; 1155 /* strip bus name if present */ 1156 if ((cp = strchr(mstat.name, '/')) != NULL) { 1157 cp++; 1158 } else { 1159 cp = mstat.name; 1160 } 1161 /* already loaded? */ 1162 if (strcmp(ifname, cp) == 0 || 1163 strcmp(ifkind, cp) == 0) 1164 return; 1165 } 1166 } 1167 1168 /* not present, we should try to load it */ 1169 kldload(ifkind); 1170} 1171 1172static struct cmd basic_cmds[] = { 1173 DEF_CMD("up", IFF_UP, setifflags), 1174 DEF_CMD("down", -IFF_UP, setifflags), 1175 DEF_CMD("arp", -IFF_NOARP, setifflags), 1176 DEF_CMD("-arp", IFF_NOARP, setifflags), 1177 DEF_CMD("debug", IFF_DEBUG, setifflags), 1178 DEF_CMD("-debug", -IFF_DEBUG, setifflags), 1179 DEF_CMD_ARG("description", setifdescr), 1180 DEF_CMD_ARG("descr", setifdescr), 1181 DEF_CMD("-description", 0, unsetifdescr), 1182 DEF_CMD("-descr", 0, unsetifdescr), 1183 DEF_CMD("promisc", IFF_PPROMISC, setifflags), 1184 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags), 1185 DEF_CMD("add", IFF_UP, notealias), 1186 DEF_CMD("alias", IFF_UP, notealias), 1187 DEF_CMD("-alias", -IFF_UP, notealias), 1188 DEF_CMD("delete", -IFF_UP, notealias), 1189 DEF_CMD("remove", -IFF_UP, notealias), 1190#ifdef notdef 1191#define EN_SWABIPS 0x1000 1192 DEF_CMD("swabips", EN_SWABIPS, setifflags), 1193 DEF_CMD("-swabips", -EN_SWABIPS, setifflags), 1194#endif 1195 DEF_CMD_ARG("netmask", setifnetmask), 1196 DEF_CMD_ARG("metric", setifmetric), 1197 DEF_CMD_ARG("broadcast", setifbroadaddr), 1198 DEF_CMD_ARG("ipdst", setifipdst), 1199 DEF_CMD_ARG2("tunnel", settunnel), 1200 DEF_CMD("-tunnel", 0, deletetunnel), 1201 DEF_CMD("deletetunnel", 0, deletetunnel), 1202#ifdef JAIL 1203 DEF_CMD_ARG("vnet", setifvnet), 1204 DEF_CMD_ARG("-vnet", setifrvnet), 1205#endif 1206 DEF_CMD("link0", IFF_LINK0, setifflags), 1207 DEF_CMD("-link0", -IFF_LINK0, setifflags), 1208 DEF_CMD("link1", IFF_LINK1, setifflags), 1209 DEF_CMD("-link1", -IFF_LINK1, setifflags), 1210 DEF_CMD("link2", IFF_LINK2, setifflags), 1211 DEF_CMD("-link2", -IFF_LINK2, setifflags), 1212 DEF_CMD("monitor", IFF_MONITOR, setifflags), 1213 DEF_CMD("-monitor", -IFF_MONITOR, setifflags), 1214 DEF_CMD("staticarp", IFF_STATICARP, setifflags), 1215 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), 1216 DEF_CMD("rxcsum6", IFCAP_RXCSUM_IPV6, setifcap), 1217 DEF_CMD("-rxcsum6", -IFCAP_RXCSUM_IPV6, setifcap), 1218 DEF_CMD("txcsum6", IFCAP_TXCSUM_IPV6, setifcap), 1219 DEF_CMD("-txcsum6", -IFCAP_TXCSUM_IPV6, setifcap), 1220 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), 1221 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), 1222 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), 1223 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), 1224 DEF_CMD("netcons", IFCAP_NETCONS, setifcap), 1225 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), 1226 DEF_CMD("polling", IFCAP_POLLING, setifcap), 1227 DEF_CMD("-polling", -IFCAP_POLLING, setifcap), 1228 DEF_CMD("tso6", IFCAP_TSO6, setifcap), 1229 DEF_CMD("-tso6", -IFCAP_TSO6, setifcap), 1230 DEF_CMD("tso4", IFCAP_TSO4, setifcap), 1231 DEF_CMD("-tso4", -IFCAP_TSO4, setifcap), 1232 DEF_CMD("tso", IFCAP_TSO, setifcap), 1233 DEF_CMD("-tso", -IFCAP_TSO, setifcap), 1234 DEF_CMD("toe", IFCAP_TOE, setifcap), 1235 DEF_CMD("-toe", -IFCAP_TOE, setifcap), 1236 DEF_CMD("lro", IFCAP_LRO, setifcap), 1237 DEF_CMD("-lro", -IFCAP_LRO, setifcap), 1238 DEF_CMD("wol", IFCAP_WOL, setifcap), 1239 DEF_CMD("-wol", -IFCAP_WOL, setifcap), 1240 DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap), 1241 DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap), 1242 DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap), 1243 DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap), 1244 DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap), 1245 DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap), 1246 DEF_CMD("normal", -IFF_LINK0, setifflags), 1247 DEF_CMD("compress", IFF_LINK0, setifflags), 1248 DEF_CMD("noicmp", IFF_LINK1, setifflags), 1249 DEF_CMD_ARG("mtu", setifmtu), 1250 DEF_CMD_ARG("name", setifname), 1251}; 1252 1253static __constructor void 1254ifconfig_ctor(void) 1255{ 1256 size_t i; 1257 1258 for (i = 0; i < nitems(basic_cmds); i++) 1259 cmd_register(&basic_cmds[i]); 1260} 1261