ifconfig.c revision 194871
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: head/sbin/ifconfig/ifconfig.c 194871 2009-06-24 18:21:37Z jamie $"; 42#endif /* not lint */ 43 44#include <sys/param.h> 45#include <sys/ioctl.h> 46#include <sys/socket.h> 47#include <sys/sysctl.h> 48#include <sys/time.h> 49#include <sys/module.h> 50#include <sys/linker.h> 51 52#include <net/ethernet.h> 53#include <net/if.h> 54#include <net/if_var.h> 55#include <net/if_dl.h> 56#include <net/if_types.h> 57#include <net/route.h> 58 59/* IP */ 60#include <netinet/in.h> 61#include <netinet/in_var.h> 62#include <arpa/inet.h> 63#include <netdb.h> 64 65#include <ifaddrs.h> 66#include <ctype.h> 67#include <err.h> 68#include <errno.h> 69#include <fcntl.h> 70#include <jail.h> 71#include <stdio.h> 72#include <stdlib.h> 73#include <string.h> 74#include <unistd.h> 75 76#include "ifconfig.h" 77 78/* 79 * Since "struct ifreq" is composed of various union members, callers 80 * should pay special attention to interprete the value. 81 * (.e.g. little/big endian difference in the structure.) 82 */ 83struct ifreq ifr; 84 85char name[IFNAMSIZ]; 86int setaddr; 87int setmask; 88int doalias; 89int clearaddr; 90int newaddr = 1; 91int verbose; 92int noload; 93 94int supmedia = 0; 95int printkeys = 0; /* Print keying material for interfaces. */ 96 97static int ifconfig(int argc, char *const *argv, int iscreate, 98 const struct afswtch *afp); 99static void status(const struct afswtch *afp, const struct sockaddr_dl *sdl, 100 struct ifaddrs *ifa); 101static void tunnel_status(int s); 102static void usage(void); 103 104static struct afswtch *af_getbyname(const char *name); 105static struct afswtch *af_getbyfamily(int af); 106static void af_other_status(int); 107 108static struct option *opts = NULL; 109 110void 111opt_register(struct option *p) 112{ 113 p->next = opts; 114 opts = p; 115} 116 117static void 118usage(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 141int 142main(int argc, char *argv[]) 143{ 144 int c, all, namesonly, downonly, uponly; 145 const struct afswtch *afp = NULL; 146 int ifindex; 147 struct ifaddrs *ifap, *ifa; 148 struct ifreq paifr; 149 const struct sockaddr_dl *sdl; 150 char options[1024], *cp; 151 const char *ifname; 152 struct option *p; 153 size_t iflen; 154 155 all = downonly = uponly = namesonly = noload = verbose = 0; 156 157 /* Parse leading line options */ 158 strlcpy(options, "adklmnuv", sizeof(options)); 159 for (p = opts; p != NULL; p = p->next) 160 strlcat(options, p->opt, sizeof(options)); 161 while ((c = getopt(argc, argv, options)) != -1) { 162 switch (c) { 163 case 'a': /* scan all interfaces */ 164 all++; 165 break; 166 case 'd': /* restrict scan to "down" interfaces */ 167 downonly++; 168 break; 169 case 'k': 170 printkeys++; 171 break; 172 case 'l': /* scan interface names only */ 173 namesonly++; 174 break; 175 case 'm': /* show media choices in status */ 176 supmedia = 1; 177 break; 178 case 'n': /* suppress module loading */ 179 noload++; 180 break; 181 case 'u': /* restrict scan to "up" interfaces */ 182 uponly++; 183 break; 184 case 'v': 185 verbose++; 186 break; 187 default: 188 for (p = opts; p != NULL; p = p->next) 189 if (p->opt[0] == c) { 190 p->cb(optarg); 191 break; 192 } 193 if (p == NULL) 194 usage(); 195 break; 196 } 197 } 198 argc -= optind; 199 argv += optind; 200 201 /* -l cannot be used with -a or -m */ 202 if (namesonly && (all || supmedia)) 203 usage(); 204 205 /* nonsense.. */ 206 if (uponly && downonly) 207 usage(); 208 209 /* no arguments is equivalent to '-a' */ 210 if (!namesonly && argc < 1) 211 all = 1; 212 213 /* -a and -l allow an address family arg to limit the output */ 214 if (all || namesonly) { 215 if (argc > 1) 216 usage(); 217 218 ifname = NULL; 219 ifindex = 0; 220 if (argc == 1) { 221 afp = af_getbyname(*argv); 222 if (afp == NULL) 223 usage(); 224 if (afp->af_name != NULL) 225 argc--, argv++; 226 /* leave with afp non-zero */ 227 } 228 } else { 229 /* not listing, need an argument */ 230 if (argc < 1) 231 usage(); 232 233 ifname = *argv; 234 argc--, argv++; 235 236 /* check and maybe load support for this interface */ 237 ifmaybeload(ifname); 238 239 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 if (getifaddrs(&ifap) != 0) 267 err(EXIT_FAILURE, "getifaddrs"); 268 cp = NULL; 269 ifindex = 0; 270 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 271 memset(&paifr, 0, sizeof(paifr)); 272 strncpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name)); 273 if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) { 274 memcpy(&paifr.ifr_addr, ifa->ifa_addr, 275 ifa->ifa_addr->sa_len); 276 } 277 278 if (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0) 279 continue; 280 if (ifa->ifa_addr->sa_family == AF_LINK) 281 sdl = (const struct sockaddr_dl *) ifa->ifa_addr; 282 else 283 sdl = NULL; 284 if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0) 285 continue; 286 iflen = strlcpy(name, ifa->ifa_name, sizeof(name)); 287 if (iflen >= sizeof(name)) { 288 warnx("%s: interface name too long, skipping", 289 ifa->ifa_name); 290 continue; 291 } 292 cp = ifa->ifa_name; 293 294 if (downonly && (ifa->ifa_flags & IFF_UP) != 0) 295 continue; 296 if (uponly && (ifa->ifa_flags & IFF_UP) == 0) 297 continue; 298 ifindex++; 299 /* 300 * Are we just listing the interfaces? 301 */ 302 if (namesonly) { 303 if (ifindex > 1) 304 printf(" "); 305 fputs(name, stdout); 306 continue; 307 } 308 309 if (argc > 0) 310 ifconfig(argc, argv, 0, afp); 311 else 312 status(afp, sdl, ifa); 313 } 314 if (namesonly) 315 printf("\n"); 316 freeifaddrs(ifap); 317 318 exit(0); 319} 320 321static struct afswtch *afs = NULL; 322 323void 324af_register(struct afswtch *p) 325{ 326 p->af_next = afs; 327 afs = p; 328} 329 330static struct afswtch * 331af_getbyname(const char *name) 332{ 333 struct afswtch *afp; 334 335 for (afp = afs; afp != NULL; afp = afp->af_next) 336 if (strcmp(afp->af_name, name) == 0) 337 return afp; 338 return NULL; 339} 340 341static struct afswtch * 342af_getbyfamily(int af) 343{ 344 struct afswtch *afp; 345 346 for (afp = afs; afp != NULL; afp = afp->af_next) 347 if (afp->af_af == af) 348 return afp; 349 return NULL; 350} 351 352static void 353af_other_status(int s) 354{ 355 struct afswtch *afp; 356 uint8_t afmask[howmany(AF_MAX, NBBY)]; 357 358 memset(afmask, 0, sizeof(afmask)); 359 for (afp = afs; afp != NULL; afp = afp->af_next) { 360 if (afp->af_other_status == NULL) 361 continue; 362 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 363 continue; 364 afp->af_other_status(s); 365 setbit(afmask, afp->af_af); 366 } 367} 368 369static void 370af_all_tunnel_status(int s) 371{ 372 struct afswtch *afp; 373 uint8_t afmask[howmany(AF_MAX, NBBY)]; 374 375 memset(afmask, 0, sizeof(afmask)); 376 for (afp = afs; afp != NULL; afp = afp->af_next) { 377 if (afp->af_status_tunnel == NULL) 378 continue; 379 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 380 continue; 381 afp->af_status_tunnel(s); 382 setbit(afmask, afp->af_af); 383 } 384} 385 386static struct cmd *cmds = NULL; 387 388void 389cmd_register(struct cmd *p) 390{ 391 p->c_next = cmds; 392 cmds = p; 393} 394 395static const struct cmd * 396cmd_lookup(const char *name, int iscreate) 397{ 398#define N(a) (sizeof(a)/sizeof(a[0])) 399 const struct cmd *p; 400 401 for (p = cmds; p != NULL; p = p->c_next) 402 if (strcmp(name, p->c_name) == 0) { 403 if (iscreate) { 404 if (p->c_iscloneop) 405 return p; 406 } else { 407 if (!p->c_iscloneop) 408 return p; 409 } 410 } 411 return NULL; 412#undef N 413} 414 415struct callback { 416 callback_func *cb_func; 417 void *cb_arg; 418 struct callback *cb_next; 419}; 420static struct callback *callbacks = NULL; 421 422void 423callback_register(callback_func *func, void *arg) 424{ 425 struct callback *cb; 426 427 cb = malloc(sizeof(struct callback)); 428 if (cb == NULL) 429 errx(1, "unable to allocate memory for callback"); 430 cb->cb_func = func; 431 cb->cb_arg = arg; 432 cb->cb_next = callbacks; 433 callbacks = cb; 434} 435 436/* specially-handled commands */ 437static void setifaddr(const char *, int, int, const struct afswtch *); 438static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr); 439 440static void setifdstaddr(const char *, int, int, const struct afswtch *); 441static const struct cmd setifdstaddr_cmd = 442 DEF_CMD("ifdstaddr", 0, setifdstaddr); 443 444static int 445ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *uafp) 446{ 447 const struct afswtch *afp, *nafp; 448 const struct cmd *p; 449 struct callback *cb; 450 int s; 451 452 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name); 453 afp = uafp != NULL ? uafp : af_getbyname("inet"); 454top: 455 ifr.ifr_addr.sa_family = 456 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ? 457 AF_LOCAL : afp->af_af; 458 459 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 && 460 (uafp != NULL || errno != EPROTONOSUPPORT || 461 (s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0)) 462 err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family); 463 464 while (argc > 0) { 465 p = cmd_lookup(*argv, iscreate); 466 if (iscreate && p == NULL) { 467 /* 468 * Push the clone create callback so the new 469 * device is created and can be used for any 470 * remaining arguments. 471 */ 472 cb = callbacks; 473 if (cb == NULL) 474 errx(1, "internal error, no callback"); 475 callbacks = cb->cb_next; 476 cb->cb_func(s, cb->cb_arg); 477 iscreate = 0; 478 /* 479 * Handle any address family spec that 480 * immediately follows and potentially 481 * recreate the socket. 482 */ 483 nafp = af_getbyname(*argv); 484 if (nafp != NULL) { 485 argc--, argv++; 486 if (nafp != afp) { 487 close(s); 488 afp = nafp; 489 goto top; 490 } 491 } 492 /* 493 * Look for a normal parameter. 494 */ 495 continue; 496 } 497 if (p == NULL) { 498 /* 499 * Not a recognized command, choose between setting 500 * the interface address and the dst address. 501 */ 502 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd); 503 } 504 if (p->c_u.c_func || p->c_u.c_func2) { 505 if (p->c_parameter == NEXTARG) { 506 if (argv[1] == NULL) 507 errx(1, "'%s' requires argument", 508 p->c_name); 509 p->c_u.c_func(argv[1], 0, s, afp); 510 argc--, argv++; 511 } else if (p->c_parameter == OPTARG) { 512 p->c_u.c_func(argv[1], 0, s, afp); 513 if (argv[1] != NULL) 514 argc--, argv++; 515 } else if (p->c_parameter == NEXTARG2) { 516 if (argc < 3) 517 errx(1, "'%s' requires 2 arguments", 518 p->c_name); 519 p->c_u.c_func2(argv[1], argv[2], s, afp); 520 argc -= 2, argv += 2; 521 } else 522 p->c_u.c_func(*argv, p->c_parameter, s, afp); 523 } 524 argc--, argv++; 525 } 526 527 /* 528 * Do any post argument processing required by the address family. 529 */ 530 if (afp->af_postproc != NULL) 531 afp->af_postproc(s, afp); 532 /* 533 * Do deferred callbacks registered while processing 534 * command-line arguments. 535 */ 536 for (cb = callbacks; cb != NULL; cb = cb->cb_next) 537 cb->cb_func(s, cb->cb_arg); 538 /* 539 * Do deferred operations. 540 */ 541 if (clearaddr) { 542 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) { 543 warnx("interface %s cannot change %s addresses!", 544 name, afp->af_name); 545 clearaddr = 0; 546 } 547 } 548 if (clearaddr) { 549 int ret; 550 strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name); 551 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq); 552 if (ret < 0) { 553 if (errno == EADDRNOTAVAIL && (doalias >= 0)) { 554 /* means no previous address for interface */ 555 } else 556 Perror("ioctl (SIOCDIFADDR)"); 557 } 558 } 559 if (newaddr) { 560 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) { 561 warnx("interface %s cannot change %s addresses!", 562 name, afp->af_name); 563 newaddr = 0; 564 } 565 } 566 if (newaddr && (setaddr || setmask)) { 567 strncpy(afp->af_addreq, name, sizeof ifr.ifr_name); 568 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0) 569 Perror("ioctl (SIOCAIFADDR)"); 570 } 571 572 close(s); 573 return(0); 574} 575 576/*ARGSUSED*/ 577static void 578setifaddr(const char *addr, int param, int s, const struct afswtch *afp) 579{ 580 if (afp->af_getaddr == NULL) 581 return; 582 /* 583 * Delay the ioctl to set the interface addr until flags are all set. 584 * The address interpretation may depend on the flags, 585 * and the flags may change when the address is set. 586 */ 587 setaddr++; 588 if (doalias == 0 && afp->af_af != AF_LINK) 589 clearaddr = 1; 590 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); 591} 592 593static void 594settunnel(const char *src, const char *dst, int s, const struct afswtch *afp) 595{ 596 struct addrinfo *srcres, *dstres; 597 int ecode; 598 599 if (afp->af_settunnel == NULL) { 600 warn("address family %s does not support tunnel setup", 601 afp->af_name); 602 return; 603 } 604 605 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) 606 errx(1, "error in parsing address string: %s", 607 gai_strerror(ecode)); 608 609 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) 610 errx(1, "error in parsing address string: %s", 611 gai_strerror(ecode)); 612 613 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 614 errx(1, 615 "source and destination address families do not match"); 616 617 afp->af_settunnel(s, srcres, dstres); 618 619 freeaddrinfo(srcres); 620 freeaddrinfo(dstres); 621} 622 623/* ARGSUSED */ 624static void 625deletetunnel(const char *vname, int param, int s, const struct afswtch *afp) 626{ 627 628 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0) 629 err(1, "SIOCDIFPHYADDR"); 630} 631 632static void 633setifvnet(const char *jname, int dummy __unused, int s, 634 const struct afswtch *afp) 635{ 636 struct ifreq my_ifr; 637 638 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 639 ifr.ifr_jid = jail_getid(jname); 640 if (ifr.ifr_jid < 0) 641 errx(1, "%s", jail_errmsg); 642 if (ioctl(s, SIOCSIFVNET, &ifr) < 0) 643 err(1, "SIOCSIFVNET"); 644} 645 646static void 647setifrvnet(const char *jname, int dummy __unused, int s, 648 const struct afswtch *afp) 649{ 650 struct ifreq my_ifr; 651 652 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 653 ifr.ifr_jid = jail_getid(jname); 654 if (ifr.ifr_jid < 0) 655 errx(1, "%s", jail_errmsg); 656 if (ioctl(s, SIOCSIFRVNET, &ifr) < 0) 657 err(1, "SIOCSIFRVNET"); 658} 659 660static void 661setifnetmask(const char *addr, int dummy __unused, int s, 662 const struct afswtch *afp) 663{ 664 if (afp->af_getaddr != NULL) { 665 setmask++; 666 afp->af_getaddr(addr, MASK); 667 } 668} 669 670static void 671setifbroadaddr(const char *addr, int dummy __unused, int s, 672 const struct afswtch *afp) 673{ 674 if (afp->af_getaddr != NULL) 675 afp->af_getaddr(addr, DSTADDR); 676} 677 678static void 679setifipdst(const char *addr, int dummy __unused, int s, 680 const struct afswtch *afp) 681{ 682 const struct afswtch *inet; 683 684 inet = af_getbyname("inet"); 685 if (inet == NULL) 686 return; 687 inet->af_getaddr(addr, DSTADDR); 688 clearaddr = 0; 689 newaddr = 0; 690} 691 692static void 693notealias(const char *addr, int param, int s, const struct afswtch *afp) 694{ 695#define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr)) 696 if (setaddr && doalias == 0 && param < 0) 697 if (afp->af_addreq != NULL && afp->af_ridreq != NULL) 698 bcopy((caddr_t)rqtosa(af_addreq), 699 (caddr_t)rqtosa(af_ridreq), 700 rqtosa(af_addreq)->sa_len); 701 doalias = param; 702 if (param < 0) { 703 clearaddr = 1; 704 newaddr = 0; 705 } else 706 clearaddr = 0; 707#undef rqtosa 708} 709 710/*ARGSUSED*/ 711static void 712setifdstaddr(const char *addr, int param __unused, int s, 713 const struct afswtch *afp) 714{ 715 if (afp->af_getaddr != NULL) 716 afp->af_getaddr(addr, DSTADDR); 717} 718 719/* 720 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion 721 * of the ifreq structure, which may confuse other parts of ifconfig. 722 * Make a private copy so we can avoid that. 723 */ 724static void 725setifflags(const char *vname, int value, int s, const struct afswtch *afp) 726{ 727 struct ifreq my_ifr; 728 int flags; 729 730 memset(&my_ifr, 0, sizeof(my_ifr)); 731 (void) strlcpy(my_ifr.ifr_name, name, sizeof(my_ifr.ifr_name)); 732 733 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) { 734 Perror("ioctl (SIOCGIFFLAGS)"); 735 exit(1); 736 } 737 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16); 738 739 if (value < 0) { 740 value = -value; 741 flags &= ~value; 742 } else 743 flags |= value; 744 my_ifr.ifr_flags = flags & 0xffff; 745 my_ifr.ifr_flagshigh = flags >> 16; 746 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0) 747 Perror(vname); 748} 749 750void 751setifcap(const char *vname, int value, int s, const struct afswtch *afp) 752{ 753 int flags; 754 755 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) { 756 Perror("ioctl (SIOCGIFCAP)"); 757 exit(1); 758 } 759 flags = ifr.ifr_curcap; 760 if (value < 0) { 761 value = -value; 762 flags &= ~value; 763 } else 764 flags |= value; 765 flags &= ifr.ifr_reqcap; 766 ifr.ifr_reqcap = flags; 767 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0) 768 Perror(vname); 769} 770 771static void 772setifmetric(const char *val, int dummy __unused, int s, 773 const struct afswtch *afp) 774{ 775 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 776 ifr.ifr_metric = atoi(val); 777 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0) 778 warn("ioctl (set metric)"); 779} 780 781static void 782setifmtu(const char *val, int dummy __unused, int s, 783 const struct afswtch *afp) 784{ 785 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 786 ifr.ifr_mtu = atoi(val); 787 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0) 788 warn("ioctl (set mtu)"); 789} 790 791static void 792setifname(const char *val, int dummy __unused, int s, 793 const struct afswtch *afp) 794{ 795 char *newname; 796 797 newname = strdup(val); 798 if (newname == NULL) { 799 warn("no memory to set ifname"); 800 return; 801 } 802 ifr.ifr_data = newname; 803 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 804 warn("ioctl (set name)"); 805 free(newname); 806 return; 807 } 808 strlcpy(name, newname, sizeof(name)); 809 free(newname); 810} 811 812#define IFFBITS \ 813"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \ 814"\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ 815"\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP" 816 817#define IFCAPBITS \ 818"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \ 819"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \ 820"\21VLAN_HWFILTER" 821 822/* 823 * Print the status of the interface. If an address family was 824 * specified, show only it; otherwise, show them all. 825 */ 826static void 827status(const struct afswtch *afp, const struct sockaddr_dl *sdl, 828 struct ifaddrs *ifa) 829{ 830 struct ifaddrs *ift; 831 int allfamilies, s; 832 struct ifstat ifs; 833 834 if (afp == NULL) { 835 allfamilies = 1; 836 ifr.ifr_addr.sa_family = AF_LOCAL; 837 } else { 838 allfamilies = 0; 839 ifr.ifr_addr.sa_family = 840 afp->af_af == AF_LINK ? AF_LOCAL : afp->af_af; 841 } 842 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 843 844 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0); 845 if (s < 0) 846 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 847 848 printf("%s: ", name); 849 printb("flags", ifa->ifa_flags, IFFBITS); 850 if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1) 851 printf(" metric %d", ifr.ifr_metric); 852 if (ioctl(s, SIOCGIFMTU, &ifr) != -1) 853 printf(" mtu %d", ifr.ifr_mtu); 854 putchar('\n'); 855 856 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) { 857 if (ifr.ifr_curcap != 0) { 858 printb("\toptions", ifr.ifr_curcap, IFCAPBITS); 859 putchar('\n'); 860 } 861 if (supmedia && ifr.ifr_reqcap != 0) { 862 printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS); 863 putchar('\n'); 864 } 865 } 866 867 tunnel_status(s); 868 869 for (ift = ifa; ift != NULL; ift = ift->ifa_next) { 870 if (ift->ifa_addr == NULL) 871 continue; 872 if (strcmp(ifa->ifa_name, ift->ifa_name) != 0) 873 continue; 874 if (allfamilies) { 875 const struct afswtch *p; 876 p = af_getbyfamily(ift->ifa_addr->sa_family); 877 if (p != NULL && p->af_status != NULL) 878 p->af_status(s, ift); 879 } else if (afp->af_af == ift->ifa_addr->sa_family) 880 afp->af_status(s, ift); 881 } 882#if 0 883 if (allfamilies || afp->af_af == AF_LINK) { 884 const struct afswtch *lafp; 885 886 /* 887 * Hack; the link level address is received separately 888 * from the routing information so any address is not 889 * handled above. Cobble together an entry and invoke 890 * the status method specially. 891 */ 892 lafp = af_getbyname("lladdr"); 893 if (lafp != NULL) { 894 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; 895 lafp->af_status(s, &info); 896 } 897 } 898#endif 899 if (allfamilies) 900 af_other_status(s); 901 else if (afp->af_other_status != NULL) 902 afp->af_other_status(s); 903 904 strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name); 905 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0) 906 printf("%s", ifs.ascii); 907 908 close(s); 909 return; 910} 911 912static void 913tunnel_status(int s) 914{ 915 af_all_tunnel_status(s); 916} 917 918void 919Perror(const char *cmd) 920{ 921 switch (errno) { 922 923 case ENXIO: 924 errx(1, "%s: no such interface", cmd); 925 break; 926 927 case EPERM: 928 errx(1, "%s: permission denied", cmd); 929 break; 930 931 default: 932 err(1, "%s", cmd); 933 } 934} 935 936/* 937 * Print a value a la the %b format of the kernel's printf 938 */ 939void 940printb(const char *s, unsigned v, const char *bits) 941{ 942 int i, any = 0; 943 char c; 944 945 if (bits && *bits == 8) 946 printf("%s=%o", s, v); 947 else 948 printf("%s=%x", s, v); 949 bits++; 950 if (bits) { 951 putchar('<'); 952 while ((i = *bits++) != '\0') { 953 if (v & (1 << (i-1))) { 954 if (any) 955 putchar(','); 956 any = 1; 957 for (; (c = *bits) > 32; bits++) 958 putchar(c); 959 } else 960 for (; *bits > 32; bits++) 961 ; 962 } 963 putchar('>'); 964 } 965} 966 967void 968ifmaybeload(const char *name) 969{ 970#define MOD_PREFIX_LEN 3 /* "if_" */ 971 struct module_stat mstat; 972 int fileid, modid; 973 char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp; 974 const char *cp; 975 976 /* loading suppressed by the user */ 977 if (noload) 978 return; 979 980 /* trim the interface number off the end */ 981 strlcpy(ifname, name, sizeof(ifname)); 982 for (dp = ifname; *dp != 0; dp++) 983 if (isdigit(*dp)) { 984 *dp = 0; 985 break; 986 } 987 988 /* turn interface and unit into module name */ 989 strcpy(ifkind, "if_"); 990 strlcpy(ifkind + MOD_PREFIX_LEN, ifname, 991 sizeof(ifkind) - MOD_PREFIX_LEN); 992 993 /* scan files in kernel */ 994 mstat.version = sizeof(struct module_stat); 995 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { 996 /* scan modules in file */ 997 for (modid = kldfirstmod(fileid); modid > 0; 998 modid = modfnext(modid)) { 999 if (modstat(modid, &mstat) < 0) 1000 continue; 1001 /* strip bus name if present */ 1002 if ((cp = strchr(mstat.name, '/')) != NULL) { 1003 cp++; 1004 } else { 1005 cp = mstat.name; 1006 } 1007 /* already loaded? */ 1008 if (strncmp(ifname, cp, strlen(ifname) + 1) == 0 || 1009 strncmp(ifkind, cp, strlen(ifkind) + 1) == 0) 1010 return; 1011 } 1012 } 1013 1014 /* not present, we should try to load it */ 1015 kldload(ifkind); 1016} 1017 1018static struct cmd basic_cmds[] = { 1019 DEF_CMD("up", IFF_UP, setifflags), 1020 DEF_CMD("down", -IFF_UP, setifflags), 1021 DEF_CMD("arp", -IFF_NOARP, setifflags), 1022 DEF_CMD("-arp", IFF_NOARP, setifflags), 1023 DEF_CMD("debug", IFF_DEBUG, setifflags), 1024 DEF_CMD("-debug", -IFF_DEBUG, setifflags), 1025 DEF_CMD("promisc", IFF_PPROMISC, setifflags), 1026 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags), 1027 DEF_CMD("add", IFF_UP, notealias), 1028 DEF_CMD("alias", IFF_UP, notealias), 1029 DEF_CMD("-alias", -IFF_UP, notealias), 1030 DEF_CMD("delete", -IFF_UP, notealias), 1031 DEF_CMD("remove", -IFF_UP, notealias), 1032#ifdef notdef 1033#define EN_SWABIPS 0x1000 1034 DEF_CMD("swabips", EN_SWABIPS, setifflags), 1035 DEF_CMD("-swabips", -EN_SWABIPS, setifflags), 1036#endif 1037 DEF_CMD_ARG("netmask", setifnetmask), 1038 DEF_CMD_ARG("metric", setifmetric), 1039 DEF_CMD_ARG("broadcast", setifbroadaddr), 1040 DEF_CMD_ARG("ipdst", setifipdst), 1041 DEF_CMD_ARG2("tunnel", settunnel), 1042 DEF_CMD("-tunnel", 0, deletetunnel), 1043 DEF_CMD("deletetunnel", 0, deletetunnel), 1044 DEF_CMD_ARG("vnet", setifvnet), 1045 DEF_CMD_ARG("-vnet", setifrvnet), 1046 DEF_CMD("link0", IFF_LINK0, setifflags), 1047 DEF_CMD("-link0", -IFF_LINK0, setifflags), 1048 DEF_CMD("link1", IFF_LINK1, setifflags), 1049 DEF_CMD("-link1", -IFF_LINK1, setifflags), 1050 DEF_CMD("link2", IFF_LINK2, setifflags), 1051 DEF_CMD("-link2", -IFF_LINK2, setifflags), 1052 DEF_CMD("monitor", IFF_MONITOR, setifflags), 1053 DEF_CMD("-monitor", -IFF_MONITOR, setifflags), 1054 DEF_CMD("staticarp", IFF_STATICARP, setifflags), 1055 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), 1056 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), 1057 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), 1058 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), 1059 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), 1060 DEF_CMD("netcons", IFCAP_NETCONS, setifcap), 1061 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), 1062 DEF_CMD("polling", IFCAP_POLLING, setifcap), 1063 DEF_CMD("-polling", -IFCAP_POLLING, setifcap), 1064 DEF_CMD("tso", IFCAP_TSO, setifcap), 1065 DEF_CMD("-tso", -IFCAP_TSO, setifcap), 1066 DEF_CMD("lro", IFCAP_LRO, setifcap), 1067 DEF_CMD("-lro", -IFCAP_LRO, setifcap), 1068 DEF_CMD("wol", IFCAP_WOL, setifcap), 1069 DEF_CMD("-wol", -IFCAP_WOL, setifcap), 1070 DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap), 1071 DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap), 1072 DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap), 1073 DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap), 1074 DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap), 1075 DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap), 1076 DEF_CMD("normal", -IFF_LINK0, setifflags), 1077 DEF_CMD("compress", IFF_LINK0, setifflags), 1078 DEF_CMD("noicmp", IFF_LINK1, setifflags), 1079 DEF_CMD_ARG("mtu", setifmtu), 1080 DEF_CMD_ARG("name", setifname), 1081}; 1082 1083static __constructor void 1084ifconfig_ctor(void) 1085{ 1086#define N(a) (sizeof(a) / sizeof(a[0])) 1087 size_t i; 1088 1089 for (i = 0; i < N(basic_cmds); i++) 1090 cmd_register(&basic_cmds[i]); 1091#undef N 1092} 1093