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 337757 2018-08-14 14:19:57Z markj $"; 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 _Noreturn 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_parameter == NEXTARG && p->c_u.c_func) { 581 if (argv[1] == NULL) 582 errx(1, "'%s' requires argument", 583 p->c_name); 584 p->c_u.c_func(argv[1], 0, s, afp); 585 argc--, argv++; 586 } else if (p->c_parameter == OPTARG && p->c_u.c_func) { 587 p->c_u.c_func(argv[1], 0, s, afp); 588 if (argv[1] != NULL) 589 argc--, argv++; 590 } else if (p->c_parameter == NEXTARG2 && p->c_u.c_func2) { 591 if (argc < 3) 592 errx(1, "'%s' requires 2 arguments", 593 p->c_name); 594 p->c_u.c_func2(argv[1], argv[2], s, afp); 595 argc -= 2, argv += 2; 596 } else if (p->c_u.c_func) 597 p->c_u.c_func(*argv, p->c_parameter, s, afp); 598 argc--, argv++; 599 } 600 601 /* 602 * Do any post argument processing required by the address family. 603 */ 604 if (afp->af_postproc != NULL) 605 afp->af_postproc(s, afp); 606 /* 607 * Do deferred callbacks registered while processing 608 * command-line arguments. 609 */ 610 for (cb = callbacks; cb != NULL; cb = cb->cb_next) 611 cb->cb_func(s, cb->cb_arg); 612 /* 613 * Do deferred operations. 614 */ 615 if (clearaddr) { 616 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) { 617 warnx("interface %s cannot change %s addresses!", 618 name, afp->af_name); 619 clearaddr = 0; 620 } 621 } 622 if (clearaddr) { 623 int ret; 624 strlcpy(((struct ifreq *)afp->af_ridreq)->ifr_name, name, 625 sizeof ifr.ifr_name); 626 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq); 627 if (ret < 0) { 628 if (errno == EADDRNOTAVAIL && (doalias >= 0)) { 629 /* means no previous address for interface */ 630 } else 631 Perror("ioctl (SIOCDIFADDR)"); 632 } 633 } 634 if (newaddr) { 635 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) { 636 warnx("interface %s cannot change %s addresses!", 637 name, afp->af_name); 638 newaddr = 0; 639 } 640 } 641 if (newaddr && (setaddr || setmask)) { 642 strlcpy(((struct ifreq *)afp->af_addreq)->ifr_name, name, 643 sizeof ifr.ifr_name); 644 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0) 645 Perror("ioctl (SIOCAIFADDR)"); 646 } 647 648 close(s); 649 return(0); 650} 651 652/*ARGSUSED*/ 653static void 654setifaddr(const char *addr, int param, int s, const struct afswtch *afp) 655{ 656 if (afp->af_getaddr == NULL) 657 return; 658 /* 659 * Delay the ioctl to set the interface addr until flags are all set. 660 * The address interpretation may depend on the flags, 661 * and the flags may change when the address is set. 662 */ 663 setaddr++; 664 if (doalias == 0 && afp->af_af != AF_LINK) 665 clearaddr = 1; 666 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); 667} 668 669static void 670settunnel(const char *src, const char *dst, int s, const struct afswtch *afp) 671{ 672 struct addrinfo *srcres, *dstres; 673 int ecode; 674 675 if (afp->af_settunnel == NULL) { 676 warn("address family %s does not support tunnel setup", 677 afp->af_name); 678 return; 679 } 680 681 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) 682 errx(1, "error in parsing address string: %s", 683 gai_strerror(ecode)); 684 685 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) 686 errx(1, "error in parsing address string: %s", 687 gai_strerror(ecode)); 688 689 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 690 errx(1, 691 "source and destination address families do not match"); 692 693 afp->af_settunnel(s, srcres, dstres); 694 695 freeaddrinfo(srcres); 696 freeaddrinfo(dstres); 697} 698 699/* ARGSUSED */ 700static void 701deletetunnel(const char *vname, int param, int s, const struct afswtch *afp) 702{ 703 704 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0) 705 err(1, "SIOCDIFPHYADDR"); 706} 707 708#ifdef JAIL 709static void 710setifvnet(const char *jname, int dummy __unused, int s, 711 const struct afswtch *afp) 712{ 713 struct ifreq my_ifr; 714 715 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 716 my_ifr.ifr_jid = jail_getid(jname); 717 if (my_ifr.ifr_jid < 0) 718 errx(1, "%s", jail_errmsg); 719 if (ioctl(s, SIOCSIFVNET, &my_ifr) < 0) 720 err(1, "SIOCSIFVNET"); 721} 722 723static void 724setifrvnet(const char *jname, int dummy __unused, int s, 725 const struct afswtch *afp) 726{ 727 struct ifreq my_ifr; 728 729 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 730 my_ifr.ifr_jid = jail_getid(jname); 731 if (my_ifr.ifr_jid < 0) 732 errx(1, "%s", jail_errmsg); 733 if (ioctl(s, SIOCSIFRVNET, &my_ifr) < 0) 734 err(1, "SIOCSIFRVNET(%d, %s)", my_ifr.ifr_jid, my_ifr.ifr_name); 735} 736#endif 737 738static void 739setifnetmask(const char *addr, int dummy __unused, int s, 740 const struct afswtch *afp) 741{ 742 if (afp->af_getaddr != NULL) { 743 setmask++; 744 afp->af_getaddr(addr, MASK); 745 } 746} 747 748static void 749setifbroadaddr(const char *addr, int dummy __unused, int s, 750 const struct afswtch *afp) 751{ 752 if (afp->af_getaddr != NULL) 753 afp->af_getaddr(addr, DSTADDR); 754} 755 756static void 757setifipdst(const char *addr, int dummy __unused, int s, 758 const struct afswtch *afp) 759{ 760 const struct afswtch *inet; 761 762 inet = af_getbyname("inet"); 763 if (inet == NULL) 764 return; 765 inet->af_getaddr(addr, DSTADDR); 766 clearaddr = 0; 767 newaddr = 0; 768} 769 770static void 771notealias(const char *addr, int param, int s, const struct afswtch *afp) 772{ 773#define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr)) 774 if (setaddr && doalias == 0 && param < 0) 775 if (afp->af_addreq != NULL && afp->af_ridreq != NULL) 776 bcopy((caddr_t)rqtosa(af_addreq), 777 (caddr_t)rqtosa(af_ridreq), 778 rqtosa(af_addreq)->sa_len); 779 doalias = param; 780 if (param < 0) { 781 clearaddr = 1; 782 newaddr = 0; 783 } else 784 clearaddr = 0; 785#undef rqtosa 786} 787 788/*ARGSUSED*/ 789static void 790setifdstaddr(const char *addr, int param __unused, int s, 791 const struct afswtch *afp) 792{ 793 if (afp->af_getaddr != NULL) 794 afp->af_getaddr(addr, DSTADDR); 795} 796 797/* 798 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion 799 * of the ifreq structure, which may confuse other parts of ifconfig. 800 * Make a private copy so we can avoid that. 801 */ 802static void 803setifflags(const char *vname, int value, int s, const struct afswtch *afp) 804{ 805 struct ifreq my_ifr; 806 int flags; 807 808 memset(&my_ifr, 0, sizeof(my_ifr)); 809 (void) strlcpy(my_ifr.ifr_name, name, sizeof(my_ifr.ifr_name)); 810 811 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) { 812 Perror("ioctl (SIOCGIFFLAGS)"); 813 exit(1); 814 } 815 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16); 816 817 if (value < 0) { 818 value = -value; 819 flags &= ~value; 820 } else 821 flags |= value; 822 my_ifr.ifr_flags = flags & 0xffff; 823 my_ifr.ifr_flagshigh = flags >> 16; 824 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0) 825 Perror(vname); 826} 827 828void 829setifcap(const char *vname, int value, int s, const struct afswtch *afp) 830{ 831 int flags; 832 833 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) { 834 Perror("ioctl (SIOCGIFCAP)"); 835 exit(1); 836 } 837 flags = ifr.ifr_curcap; 838 if (value < 0) { 839 value = -value; 840 flags &= ~value; 841 } else 842 flags |= value; 843 flags &= ifr.ifr_reqcap; 844 ifr.ifr_reqcap = flags; 845 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0) 846 Perror(vname); 847} 848 849static void 850setifmetric(const char *val, int dummy __unused, int s, 851 const struct afswtch *afp) 852{ 853 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 854 ifr.ifr_metric = atoi(val); 855 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0) 856 err(1, "ioctl SIOCSIFMETRIC (set metric)"); 857} 858 859static void 860setifmtu(const char *val, int dummy __unused, int s, 861 const struct afswtch *afp) 862{ 863 strlcpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 864 ifr.ifr_mtu = atoi(val); 865 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0) 866 err(1, "ioctl SIOCSIFMTU (set mtu)"); 867} 868 869static void 870setifname(const char *val, int dummy __unused, int s, 871 const struct afswtch *afp) 872{ 873 char *newname; 874 875 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 876 877 newname = strdup(val); 878 if (newname == NULL) 879 err(1, "no memory to set ifname"); 880 ifr.ifr_data = newname; 881 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 882 free(newname); 883 err(1, "ioctl SIOCSIFNAME (set name)"); 884 } 885 printifname = 1; 886 strlcpy(name, newname, sizeof(name)); 887 free(newname); 888} 889 890/* ARGSUSED */ 891static void 892setifdescr(const char *val, int dummy __unused, int s, 893 const struct afswtch *afp) 894{ 895 char *newdescr; 896 897 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 898 899 ifr.ifr_buffer.length = strlen(val) + 1; 900 if (ifr.ifr_buffer.length == 1) { 901 ifr.ifr_buffer.buffer = newdescr = NULL; 902 ifr.ifr_buffer.length = 0; 903 } else { 904 newdescr = strdup(val); 905 ifr.ifr_buffer.buffer = newdescr; 906 if (newdescr == NULL) { 907 warn("no memory to set ifdescr"); 908 return; 909 } 910 } 911 912 if (ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) 913 err(1, "ioctl SIOCSIFDESCR (set descr)"); 914 915 free(newdescr); 916} 917 918/* ARGSUSED */ 919static void 920unsetifdescr(const char *val, int value, int s, const struct afswtch *afp) 921{ 922 923 setifdescr("", 0, s, 0); 924} 925 926#define IFFBITS \ 927"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \ 928"\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ 929"\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP" 930 931#define IFCAPBITS \ 932"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \ 933"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \ 934"\17TOE4\20TOE6\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE\25NETMAP" \ 935"\26RXCSUM_IPV6\27TXCSUM_IPV6" 936 937/* 938 * Print the status of the interface. If an address family was 939 * specified, show only it; otherwise, show them all. 940 */ 941static void 942status(const struct afswtch *afp, const struct sockaddr_dl *sdl, 943 struct ifaddrs *ifa) 944{ 945 struct ifaddrs *ift; 946 int allfamilies, s; 947 struct ifstat ifs; 948 949 if (afp == NULL) { 950 allfamilies = 1; 951 ifr.ifr_addr.sa_family = AF_LOCAL; 952 } else { 953 allfamilies = 0; 954 ifr.ifr_addr.sa_family = 955 afp->af_af == AF_LINK ? AF_LOCAL : afp->af_af; 956 } 957 strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 958 959 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0); 960 if (s < 0) 961 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 962 963 printf("%s: ", name); 964 printb("flags", ifa->ifa_flags, IFFBITS); 965 if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1) 966 printf(" metric %d", ifr.ifr_metric); 967 if (ioctl(s, SIOCGIFMTU, &ifr) != -1) 968 printf(" mtu %d", ifr.ifr_mtu); 969 putchar('\n'); 970 971 for (;;) { 972 if ((descr = reallocf(descr, descrlen)) != NULL) { 973 ifr.ifr_buffer.buffer = descr; 974 ifr.ifr_buffer.length = descrlen; 975 if (ioctl(s, SIOCGIFDESCR, &ifr) == 0) { 976 if (ifr.ifr_buffer.buffer == descr) { 977 if (strlen(descr) > 0) 978 printf("\tdescription: %s\n", 979 descr); 980 } else if (ifr.ifr_buffer.length > descrlen) { 981 descrlen = ifr.ifr_buffer.length; 982 continue; 983 } 984 } 985 } else 986 warn("unable to allocate memory for interface" 987 "description"); 988 break; 989 } 990 991 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) { 992 if (ifr.ifr_curcap != 0) { 993 printb("\toptions", ifr.ifr_curcap, IFCAPBITS); 994 putchar('\n'); 995 } 996 if (supmedia && ifr.ifr_reqcap != 0) { 997 printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS); 998 putchar('\n'); 999 } 1000 } 1001 1002 tunnel_status(s); 1003 1004 for (ift = ifa; ift != NULL; ift = ift->ifa_next) { 1005 if (ift->ifa_addr == NULL) 1006 continue; 1007 if (strcmp(ifa->ifa_name, ift->ifa_name) != 0) 1008 continue; 1009 if (allfamilies) { 1010 const struct afswtch *p; 1011 p = af_getbyfamily(ift->ifa_addr->sa_family); 1012 if (p != NULL && p->af_status != NULL) 1013 p->af_status(s, ift); 1014 } else if (afp->af_af == ift->ifa_addr->sa_family) 1015 afp->af_status(s, ift); 1016 } 1017#if 0 1018 if (allfamilies || afp->af_af == AF_LINK) { 1019 const struct afswtch *lafp; 1020 1021 /* 1022 * Hack; the link level address is received separately 1023 * from the routing information so any address is not 1024 * handled above. Cobble together an entry and invoke 1025 * the status method specially. 1026 */ 1027 lafp = af_getbyname("lladdr"); 1028 if (lafp != NULL) { 1029 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; 1030 lafp->af_status(s, &info); 1031 } 1032 } 1033#endif 1034 if (allfamilies) 1035 af_other_status(s); 1036 else if (afp->af_other_status != NULL) 1037 afp->af_other_status(s); 1038 1039 strlcpy(ifs.ifs_name, name, sizeof ifs.ifs_name); 1040 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0) 1041 printf("%s", ifs.ascii); 1042 1043 if (verbose > 0) 1044 sfp_status(s, &ifr, verbose); 1045 1046 close(s); 1047 return; 1048} 1049 1050static void 1051tunnel_status(int s) 1052{ 1053 af_all_tunnel_status(s); 1054} 1055 1056void 1057Perror(const char *cmd) 1058{ 1059 switch (errno) { 1060 1061 case ENXIO: 1062 errx(1, "%s: no such interface", cmd); 1063 break; 1064 1065 case EPERM: 1066 errx(1, "%s: permission denied", cmd); 1067 break; 1068 1069 default: 1070 err(1, "%s", cmd); 1071 } 1072} 1073 1074/* 1075 * Print a value a la the %b format of the kernel's printf 1076 */ 1077void 1078printb(const char *s, unsigned v, const char *bits) 1079{ 1080 int i, any = 0; 1081 char c; 1082 1083 if (bits && *bits == 8) 1084 printf("%s=%o", s, v); 1085 else 1086 printf("%s=%x", s, v); 1087 if (bits) { 1088 bits++; 1089 putchar('<'); 1090 while ((i = *bits++) != '\0') { 1091 if (v & (1 << (i-1))) { 1092 if (any) 1093 putchar(','); 1094 any = 1; 1095 for (; (c = *bits) > 32; bits++) 1096 putchar(c); 1097 } else 1098 for (; *bits > 32; bits++) 1099 ; 1100 } 1101 putchar('>'); 1102 } 1103} 1104 1105void 1106print_vhid(const struct ifaddrs *ifa, const char *s) 1107{ 1108 struct if_data *ifd; 1109 1110 if (ifa->ifa_data == NULL) 1111 return; 1112 1113 ifd = ifa->ifa_data; 1114 if (ifd->ifi_vhid == 0) 1115 return; 1116 1117 printf("vhid %d ", ifd->ifi_vhid); 1118} 1119 1120void 1121ifmaybeload(const char *name) 1122{ 1123#define MOD_PREFIX_LEN 3 /* "if_" */ 1124 struct module_stat mstat; 1125 int fileid, modid; 1126 char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp; 1127 const char *cp; 1128 1129 /* loading suppressed by the user */ 1130 if (noload) 1131 return; 1132 1133 /* trim the interface number off the end */ 1134 strlcpy(ifname, name, sizeof(ifname)); 1135 for (dp = ifname; *dp != 0; dp++) 1136 if (isdigit(*dp)) { 1137 *dp = 0; 1138 break; 1139 } 1140 1141 /* turn interface and unit into module name */ 1142 strlcpy(ifkind, "if_", sizeof(ifkind)); 1143 strlcat(ifkind, ifname, sizeof(ifkind)); 1144 1145 /* scan files in kernel */ 1146 mstat.version = sizeof(struct module_stat); 1147 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { 1148 /* scan modules in file */ 1149 for (modid = kldfirstmod(fileid); modid > 0; 1150 modid = modfnext(modid)) { 1151 if (modstat(modid, &mstat) < 0) 1152 continue; 1153 /* strip bus name if present */ 1154 if ((cp = strchr(mstat.name, '/')) != NULL) { 1155 cp++; 1156 } else { 1157 cp = mstat.name; 1158 } 1159 /* already loaded? */ 1160 if (strcmp(ifname, cp) == 0 || 1161 strcmp(ifkind, cp) == 0) 1162 return; 1163 } 1164 } 1165 1166 /* 1167 * Try to load the module. But ignore failures, because ifconfig can't 1168 * infer the names of all drivers (eg mlx4en(4)). 1169 */ 1170 (void) kldload(ifkind); 1171} 1172 1173static struct cmd basic_cmds[] = { 1174 DEF_CMD("up", IFF_UP, setifflags), 1175 DEF_CMD("down", -IFF_UP, setifflags), 1176 DEF_CMD("arp", -IFF_NOARP, setifflags), 1177 DEF_CMD("-arp", IFF_NOARP, setifflags), 1178 DEF_CMD("debug", IFF_DEBUG, setifflags), 1179 DEF_CMD("-debug", -IFF_DEBUG, setifflags), 1180 DEF_CMD_ARG("description", setifdescr), 1181 DEF_CMD_ARG("descr", setifdescr), 1182 DEF_CMD("-description", 0, unsetifdescr), 1183 DEF_CMD("-descr", 0, unsetifdescr), 1184 DEF_CMD("promisc", IFF_PPROMISC, setifflags), 1185 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags), 1186 DEF_CMD("add", IFF_UP, notealias), 1187 DEF_CMD("alias", IFF_UP, notealias), 1188 DEF_CMD("-alias", -IFF_UP, notealias), 1189 DEF_CMD("delete", -IFF_UP, notealias), 1190 DEF_CMD("remove", -IFF_UP, notealias), 1191#ifdef notdef 1192#define EN_SWABIPS 0x1000 1193 DEF_CMD("swabips", EN_SWABIPS, setifflags), 1194 DEF_CMD("-swabips", -EN_SWABIPS, setifflags), 1195#endif 1196 DEF_CMD_ARG("netmask", setifnetmask), 1197 DEF_CMD_ARG("metric", setifmetric), 1198 DEF_CMD_ARG("broadcast", setifbroadaddr), 1199 DEF_CMD_ARG("ipdst", setifipdst), 1200 DEF_CMD_ARG2("tunnel", settunnel), 1201 DEF_CMD("-tunnel", 0, deletetunnel), 1202 DEF_CMD("deletetunnel", 0, deletetunnel), 1203#ifdef JAIL 1204 DEF_CMD_ARG("vnet", setifvnet), 1205 DEF_CMD_ARG("-vnet", setifrvnet), 1206#endif 1207 DEF_CMD("link0", IFF_LINK0, setifflags), 1208 DEF_CMD("-link0", -IFF_LINK0, setifflags), 1209 DEF_CMD("link1", IFF_LINK1, setifflags), 1210 DEF_CMD("-link1", -IFF_LINK1, setifflags), 1211 DEF_CMD("link2", IFF_LINK2, setifflags), 1212 DEF_CMD("-link2", -IFF_LINK2, setifflags), 1213 DEF_CMD("monitor", IFF_MONITOR, setifflags), 1214 DEF_CMD("-monitor", -IFF_MONITOR, setifflags), 1215 DEF_CMD("staticarp", IFF_STATICARP, setifflags), 1216 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), 1217 DEF_CMD("rxcsum6", IFCAP_RXCSUM_IPV6, setifcap), 1218 DEF_CMD("-rxcsum6", -IFCAP_RXCSUM_IPV6, setifcap), 1219 DEF_CMD("txcsum6", IFCAP_TXCSUM_IPV6, setifcap), 1220 DEF_CMD("-txcsum6", -IFCAP_TXCSUM_IPV6, setifcap), 1221 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), 1222 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), 1223 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), 1224 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), 1225 DEF_CMD("netcons", IFCAP_NETCONS, setifcap), 1226 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), 1227 DEF_CMD("polling", IFCAP_POLLING, setifcap), 1228 DEF_CMD("-polling", -IFCAP_POLLING, setifcap), 1229 DEF_CMD("tso6", IFCAP_TSO6, setifcap), 1230 DEF_CMD("-tso6", -IFCAP_TSO6, setifcap), 1231 DEF_CMD("tso4", IFCAP_TSO4, setifcap), 1232 DEF_CMD("-tso4", -IFCAP_TSO4, setifcap), 1233 DEF_CMD("tso", IFCAP_TSO, setifcap), 1234 DEF_CMD("-tso", -IFCAP_TSO, setifcap), 1235 DEF_CMD("toe", IFCAP_TOE, setifcap), 1236 DEF_CMD("-toe", -IFCAP_TOE, setifcap), 1237 DEF_CMD("lro", IFCAP_LRO, setifcap), 1238 DEF_CMD("-lro", -IFCAP_LRO, setifcap), 1239 DEF_CMD("wol", IFCAP_WOL, setifcap), 1240 DEF_CMD("-wol", -IFCAP_WOL, setifcap), 1241 DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap), 1242 DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap), 1243 DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap), 1244 DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap), 1245 DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap), 1246 DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap), 1247 DEF_CMD("normal", -IFF_LINK0, setifflags), 1248 DEF_CMD("compress", IFF_LINK0, setifflags), 1249 DEF_CMD("noicmp", IFF_LINK1, setifflags), 1250 DEF_CMD_ARG("mtu", setifmtu), 1251 DEF_CMD_ARG("name", setifname), 1252}; 1253 1254static __constructor void 1255ifconfig_ctor(void) 1256{ 1257 size_t i; 1258 1259 for (i = 0; i < nitems(basic_cmds); i++) 1260 cmd_register(&basic_cmds[i]); 1261} 1262