ifconfig.c revision 289986
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 289986 2015-10-26 03:43:28Z ngie $"; 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; 96 97int supmedia = 0; 98int printkeys = 0; /* Print keying material for interfaces. */ 99 100static int ifconfig(int argc, char *const *argv, int iscreate, 101 const struct afswtch *afp); 102static void status(const struct afswtch *afp, const struct sockaddr_dl *sdl, 103 struct ifaddrs *ifa); 104static void tunnel_status(int s); 105static void usage(void); 106 107static struct afswtch *af_getbyname(const char *name); 108static struct afswtch *af_getbyfamily(int af); 109static void af_other_status(int); 110 111static struct option *opts = NULL; 112 113void 114opt_register(struct option *p) 115{ 116 p->next = opts; 117 opts = p; 118} 119 120static void 121usage(void) 122{ 123 char options[1024]; 124 struct option *p; 125 126 /* XXX not right but close enough for now */ 127 options[0] = '\0'; 128 for (p = opts; p != NULL; p = p->next) { 129 strlcat(options, p->opt_usage, sizeof(options)); 130 strlcat(options, " ", sizeof(options)); 131 } 132 133 fprintf(stderr, 134 "usage: ifconfig %sinterface address_family [address [dest_address]]\n" 135 " [parameters]\n" 136 " ifconfig interface create\n" 137 " ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n" 138 " ifconfig -l [-d] [-u] [address_family]\n" 139 " ifconfig %s[-d] [-m] [-u] [-v]\n", 140 options, options, options); 141 exit(1); 142} 143 144int 145main(int argc, char *argv[]) 146{ 147 int c, all, namesonly, downonly, uponly; 148 const struct afswtch *afp = NULL; 149 int ifindex; 150 struct ifaddrs *ifap, *ifa; 151 struct ifreq paifr; 152 const struct sockaddr_dl *sdl; 153 char options[1024], *cp, *namecp = NULL; 154 const char *ifname; 155 struct option *p; 156 size_t iflen; 157 158 all = downonly = uponly = namesonly = noload = verbose = 0; 159 160 /* Parse leading line options */ 161 strlcpy(options, "adklmnuv", sizeof(options)); 162 for (p = opts; p != NULL; p = p->next) 163 strlcat(options, p->opt, sizeof(options)); 164 while ((c = getopt(argc, argv, options)) != -1) { 165 switch (c) { 166 case 'a': /* scan all interfaces */ 167 all++; 168 break; 169 case 'd': /* restrict scan to "down" interfaces */ 170 downonly++; 171 break; 172 case 'k': 173 printkeys++; 174 break; 175 case 'l': /* scan interface names only */ 176 namesonly++; 177 break; 178 case 'm': /* show media choices in status */ 179 supmedia = 1; 180 break; 181 case 'n': /* suppress module loading */ 182 noload++; 183 break; 184 case 'u': /* restrict scan to "up" interfaces */ 185 uponly++; 186 break; 187 case 'v': 188 verbose++; 189 break; 190 default: 191 for (p = opts; p != NULL; p = p->next) 192 if (p->opt[0] == c) { 193 p->cb(optarg); 194 break; 195 } 196 if (p == NULL) 197 usage(); 198 break; 199 } 200 } 201 argc -= optind; 202 argv += optind; 203 204 /* -l cannot be used with -a or -m */ 205 if (namesonly && (all || supmedia)) 206 usage(); 207 208 /* nonsense.. */ 209 if (uponly && downonly) 210 usage(); 211 212 /* no arguments is equivalent to '-a' */ 213 if (!namesonly && argc < 1) 214 all = 1; 215 216 /* -a and -l allow an address family arg to limit the output */ 217 if (all || namesonly) { 218 if (argc > 1) 219 usage(); 220 221 ifname = NULL; 222 ifindex = 0; 223 if (argc == 1) { 224 afp = af_getbyname(*argv); 225 if (afp == NULL) { 226 warnx("Address family '%s' unknown.", *argv); 227 usage(); 228 } 229 if (afp->af_name != NULL) 230 argc--, argv++; 231 /* leave with afp non-zero */ 232 } 233 } else { 234 /* not listing, need an argument */ 235 if (argc < 1) 236 usage(); 237 238 ifname = *argv; 239 argc--, argv++; 240 241 /* check and maybe load support for this interface */ 242 ifmaybeload(ifname); 243 244 ifindex = if_nametoindex(ifname); 245 if (ifindex == 0) { 246 /* 247 * NOTE: We must special-case the `create' command 248 * right here as we would otherwise fail when trying 249 * to find the interface. 250 */ 251 if (argc > 0 && (strcmp(argv[0], "create") == 0 || 252 strcmp(argv[0], "plumb") == 0)) { 253 iflen = strlcpy(name, ifname, sizeof(name)); 254 if (iflen >= sizeof(name)) 255 errx(1, "%s: cloning name too long", 256 ifname); 257 ifconfig(argc, argv, 1, NULL); 258 exit(0); 259 } 260#ifdef JAIL 261 /* 262 * NOTE: We have to special-case the `-vnet' command 263 * right here as we would otherwise fail when trying 264 * to find the interface as it lives in another vnet. 265 */ 266 if (argc > 0 && (strcmp(argv[0], "-vnet") == 0)) { 267 iflen = strlcpy(name, ifname, sizeof(name)); 268 if (iflen >= sizeof(name)) 269 errx(1, "%s: interface name too long", 270 ifname); 271 ifconfig(argc, argv, 0, NULL); 272 exit(0); 273 } 274#endif 275 errx(1, "interface %s does not exist", ifname); 276 } 277 } 278 279 /* Check for address family */ 280 if (argc > 0) { 281 afp = af_getbyname(*argv); 282 if (afp != NULL) 283 argc--, argv++; 284 } 285 286 if (getifaddrs(&ifap) != 0) 287 err(EXIT_FAILURE, "getifaddrs"); 288 cp = NULL; 289 ifindex = 0; 290 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 291 memset(&paifr, 0, sizeof(paifr)); 292 strncpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name)); 293 if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) { 294 memcpy(&paifr.ifr_addr, ifa->ifa_addr, 295 ifa->ifa_addr->sa_len); 296 } 297 298 if (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0) 299 continue; 300 if (ifa->ifa_addr->sa_family == AF_LINK) 301 sdl = (const struct sockaddr_dl *) ifa->ifa_addr; 302 else 303 sdl = NULL; 304 if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0 && !namesonly) 305 continue; 306 iflen = strlcpy(name, ifa->ifa_name, sizeof(name)); 307 if (iflen >= sizeof(name)) { 308 warnx("%s: interface name too long, skipping", 309 ifa->ifa_name); 310 continue; 311 } 312 cp = ifa->ifa_name; 313 314 if ((ifa->ifa_flags & IFF_CANTCONFIG) != 0) 315 continue; 316 if (downonly && (ifa->ifa_flags & IFF_UP) != 0) 317 continue; 318 if (uponly && (ifa->ifa_flags & IFF_UP) == 0) 319 continue; 320 /* 321 * Are we just listing the interfaces? 322 */ 323 if (namesonly) { 324 if (namecp == cp) 325 continue; 326 if (afp != NULL) { 327 /* special case for "ether" address family */ 328 if (!strcmp(afp->af_name, "ether")) { 329 if (sdl == NULL || 330 (sdl->sdl_type != IFT_ETHER && 331 sdl->sdl_type != IFT_L2VLAN && 332 sdl->sdl_type != IFT_BRIDGE) || 333 sdl->sdl_alen != ETHER_ADDR_LEN) 334 continue; 335 } else { 336 if (ifa->ifa_addr->sa_family != afp->af_af) 337 continue; 338 } 339 } 340 namecp = cp; 341 ifindex++; 342 if (ifindex > 1) 343 printf(" "); 344 fputs(name, stdout); 345 continue; 346 } 347 ifindex++; 348 349 if (argc > 0) 350 ifconfig(argc, argv, 0, afp); 351 else 352 status(afp, sdl, ifa); 353 } 354 if (namesonly) 355 printf("\n"); 356 freeifaddrs(ifap); 357 358 exit(0); 359} 360 361static struct afswtch *afs = NULL; 362 363void 364af_register(struct afswtch *p) 365{ 366 p->af_next = afs; 367 afs = p; 368} 369 370static struct afswtch * 371af_getbyname(const char *name) 372{ 373 struct afswtch *afp; 374 375 for (afp = afs; afp != NULL; afp = afp->af_next) 376 if (strcmp(afp->af_name, name) == 0) 377 return afp; 378 return NULL; 379} 380 381static struct afswtch * 382af_getbyfamily(int af) 383{ 384 struct afswtch *afp; 385 386 for (afp = afs; afp != NULL; afp = afp->af_next) 387 if (afp->af_af == af) 388 return afp; 389 return NULL; 390} 391 392static void 393af_other_status(int s) 394{ 395 struct afswtch *afp; 396 uint8_t afmask[howmany(AF_MAX, NBBY)]; 397 398 memset(afmask, 0, sizeof(afmask)); 399 for (afp = afs; afp != NULL; afp = afp->af_next) { 400 if (afp->af_other_status == NULL) 401 continue; 402 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 403 continue; 404 afp->af_other_status(s); 405 setbit(afmask, afp->af_af); 406 } 407} 408 409static void 410af_all_tunnel_status(int s) 411{ 412 struct afswtch *afp; 413 uint8_t afmask[howmany(AF_MAX, NBBY)]; 414 415 memset(afmask, 0, sizeof(afmask)); 416 for (afp = afs; afp != NULL; afp = afp->af_next) { 417 if (afp->af_status_tunnel == NULL) 418 continue; 419 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af)) 420 continue; 421 afp->af_status_tunnel(s); 422 setbit(afmask, afp->af_af); 423 } 424} 425 426static struct cmd *cmds = NULL; 427 428void 429cmd_register(struct cmd *p) 430{ 431 p->c_next = cmds; 432 cmds = p; 433} 434 435static const struct cmd * 436cmd_lookup(const char *name, int iscreate) 437{ 438 const struct cmd *p; 439 440 for (p = cmds; p != NULL; p = p->c_next) 441 if (strcmp(name, p->c_name) == 0) { 442 if (iscreate) { 443 if (p->c_iscloneop) 444 return p; 445 } else { 446 if (!p->c_iscloneop) 447 return p; 448 } 449 } 450 return NULL; 451} 452 453struct callback { 454 callback_func *cb_func; 455 void *cb_arg; 456 struct callback *cb_next; 457}; 458static struct callback *callbacks = NULL; 459 460void 461callback_register(callback_func *func, void *arg) 462{ 463 struct callback *cb; 464 465 cb = malloc(sizeof(struct callback)); 466 if (cb == NULL) 467 errx(1, "unable to allocate memory for callback"); 468 cb->cb_func = func; 469 cb->cb_arg = arg; 470 cb->cb_next = callbacks; 471 callbacks = cb; 472} 473 474/* specially-handled commands */ 475static void setifaddr(const char *, int, int, const struct afswtch *); 476static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr); 477 478static void setifdstaddr(const char *, int, int, const struct afswtch *); 479static const struct cmd setifdstaddr_cmd = 480 DEF_CMD("ifdstaddr", 0, setifdstaddr); 481 482static int 483ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *uafp) 484{ 485 const struct afswtch *afp, *nafp; 486 const struct cmd *p; 487 struct callback *cb; 488 int s; 489 490 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name); 491 afp = NULL; 492 if (uafp != NULL) 493 afp = uafp; 494 /* 495 * This is the historical "accident" allowing users to configure IPv4 496 * addresses without the "inet" keyword which while a nice feature has 497 * proven to complicate other things. We cannot remove this but only 498 * make sure we will never have a similar implicit default for IPv6 or 499 * any other address familiy. We need a fallback though for 500 * ifconfig IF up/down etc. to work without INET support as people 501 * never used ifconfig IF link up/down, etc. either. 502 */ 503#ifndef RESCUE 504#ifdef INET 505 if (afp == NULL && feature_present("inet")) 506 afp = af_getbyname("inet"); 507#endif 508#endif 509 if (afp == NULL) 510 afp = af_getbyname("link"); 511 if (afp == NULL) { 512 warnx("Please specify an address_family."); 513 usage(); 514 } 515top: 516 ifr.ifr_addr.sa_family = 517 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ? 518 AF_LOCAL : afp->af_af; 519 520 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 && 521 (uafp != NULL || errno != EAFNOSUPPORT || 522 (s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0)) 523 err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family); 524 525 while (argc > 0) { 526 p = cmd_lookup(*argv, iscreate); 527 if (iscreate && p == NULL) { 528 /* 529 * Push the clone create callback so the new 530 * device is created and can be used for any 531 * remaining arguments. 532 */ 533 cb = callbacks; 534 if (cb == NULL) 535 errx(1, "internal error, no callback"); 536 callbacks = cb->cb_next; 537 cb->cb_func(s, cb->cb_arg); 538 iscreate = 0; 539 /* 540 * Handle any address family spec that 541 * immediately follows and potentially 542 * recreate the socket. 543 */ 544 nafp = af_getbyname(*argv); 545 if (nafp != NULL) { 546 argc--, argv++; 547 if (nafp != afp) { 548 close(s); 549 afp = nafp; 550 goto top; 551 } 552 } 553 /* 554 * Look for a normal parameter. 555 */ 556 continue; 557 } 558 if (p == NULL) { 559 /* 560 * Not a recognized command, choose between setting 561 * the interface address and the dst address. 562 */ 563 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd); 564 } 565 if (p->c_u.c_func || p->c_u.c_func2) { 566 if (p->c_parameter == NEXTARG) { 567 if (argv[1] == NULL) 568 errx(1, "'%s' requires argument", 569 p->c_name); 570 p->c_u.c_func(argv[1], 0, s, afp); 571 argc--, argv++; 572 } else if (p->c_parameter == OPTARG) { 573 p->c_u.c_func(argv[1], 0, s, afp); 574 if (argv[1] != NULL) 575 argc--, argv++; 576 } else if (p->c_parameter == NEXTARG2) { 577 if (argc < 3) 578 errx(1, "'%s' requires 2 arguments", 579 p->c_name); 580 p->c_u.c_func2(argv[1], argv[2], s, afp); 581 argc -= 2, argv += 2; 582 } else 583 p->c_u.c_func(*argv, p->c_parameter, s, afp); 584 } 585 argc--, argv++; 586 } 587 588 /* 589 * Do any post argument processing required by the address family. 590 */ 591 if (afp->af_postproc != NULL) 592 afp->af_postproc(s, afp); 593 /* 594 * Do deferred callbacks registered while processing 595 * command-line arguments. 596 */ 597 for (cb = callbacks; cb != NULL; cb = cb->cb_next) 598 cb->cb_func(s, cb->cb_arg); 599 /* 600 * Do deferred operations. 601 */ 602 if (clearaddr) { 603 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) { 604 warnx("interface %s cannot change %s addresses!", 605 name, afp->af_name); 606 clearaddr = 0; 607 } 608 } 609 if (clearaddr) { 610 int ret; 611 strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name); 612 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq); 613 if (ret < 0) { 614 if (errno == EADDRNOTAVAIL && (doalias >= 0)) { 615 /* means no previous address for interface */ 616 } else 617 Perror("ioctl (SIOCDIFADDR)"); 618 } 619 } 620 if (newaddr) { 621 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) { 622 warnx("interface %s cannot change %s addresses!", 623 name, afp->af_name); 624 newaddr = 0; 625 } 626 } 627 if (newaddr && (setaddr || setmask)) { 628 strncpy(afp->af_addreq, name, sizeof ifr.ifr_name); 629 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0) 630 Perror("ioctl (SIOCAIFADDR)"); 631 } 632 633 close(s); 634 return(0); 635} 636 637/*ARGSUSED*/ 638static void 639setifaddr(const char *addr, int param, int s, const struct afswtch *afp) 640{ 641 if (afp->af_getaddr == NULL) 642 return; 643 /* 644 * Delay the ioctl to set the interface addr until flags are all set. 645 * The address interpretation may depend on the flags, 646 * and the flags may change when the address is set. 647 */ 648 setaddr++; 649 if (doalias == 0 && afp->af_af != AF_LINK) 650 clearaddr = 1; 651 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR)); 652} 653 654static void 655settunnel(const char *src, const char *dst, int s, const struct afswtch *afp) 656{ 657 struct addrinfo *srcres, *dstres; 658 int ecode; 659 660 if (afp->af_settunnel == NULL) { 661 warn("address family %s does not support tunnel setup", 662 afp->af_name); 663 return; 664 } 665 666 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0) 667 errx(1, "error in parsing address string: %s", 668 gai_strerror(ecode)); 669 670 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0) 671 errx(1, "error in parsing address string: %s", 672 gai_strerror(ecode)); 673 674 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family) 675 errx(1, 676 "source and destination address families do not match"); 677 678 afp->af_settunnel(s, srcres, dstres); 679 680 freeaddrinfo(srcres); 681 freeaddrinfo(dstres); 682} 683 684/* ARGSUSED */ 685static void 686deletetunnel(const char *vname, int param, int s, const struct afswtch *afp) 687{ 688 689 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0) 690 err(1, "SIOCDIFPHYADDR"); 691} 692 693#ifdef JAIL 694static void 695setifvnet(const char *jname, int dummy __unused, int s, 696 const struct afswtch *afp) 697{ 698 struct ifreq my_ifr; 699 700 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 701 my_ifr.ifr_jid = jail_getid(jname); 702 if (my_ifr.ifr_jid < 0) 703 errx(1, "%s", jail_errmsg); 704 if (ioctl(s, SIOCSIFVNET, &my_ifr) < 0) 705 err(1, "SIOCSIFVNET"); 706} 707 708static void 709setifrvnet(const char *jname, int dummy __unused, int s, 710 const struct afswtch *afp) 711{ 712 struct ifreq my_ifr; 713 714 memcpy(&my_ifr, &ifr, sizeof(my_ifr)); 715 my_ifr.ifr_jid = jail_getid(jname); 716 if (my_ifr.ifr_jid < 0) 717 errx(1, "%s", jail_errmsg); 718 if (ioctl(s, SIOCSIFRVNET, &my_ifr) < 0) 719 err(1, "SIOCSIFRVNET(%d, %s)", my_ifr.ifr_jid, my_ifr.ifr_name); 720} 721#endif 722 723static void 724setifnetmask(const char *addr, int dummy __unused, int s, 725 const struct afswtch *afp) 726{ 727 if (afp->af_getaddr != NULL) { 728 setmask++; 729 afp->af_getaddr(addr, MASK); 730 } 731} 732 733static void 734setifbroadaddr(const char *addr, int dummy __unused, int s, 735 const struct afswtch *afp) 736{ 737 if (afp->af_getaddr != NULL) 738 afp->af_getaddr(addr, DSTADDR); 739} 740 741static void 742setifipdst(const char *addr, int dummy __unused, int s, 743 const struct afswtch *afp) 744{ 745 const struct afswtch *inet; 746 747 inet = af_getbyname("inet"); 748 if (inet == NULL) 749 return; 750 inet->af_getaddr(addr, DSTADDR); 751 clearaddr = 0; 752 newaddr = 0; 753} 754 755static void 756notealias(const char *addr, int param, int s, const struct afswtch *afp) 757{ 758#define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr)) 759 if (setaddr && doalias == 0 && param < 0) 760 if (afp->af_addreq != NULL && afp->af_ridreq != NULL) 761 bcopy((caddr_t)rqtosa(af_addreq), 762 (caddr_t)rqtosa(af_ridreq), 763 rqtosa(af_addreq)->sa_len); 764 doalias = param; 765 if (param < 0) { 766 clearaddr = 1; 767 newaddr = 0; 768 } else 769 clearaddr = 0; 770#undef rqtosa 771} 772 773/*ARGSUSED*/ 774static void 775setifdstaddr(const char *addr, int param __unused, int s, 776 const struct afswtch *afp) 777{ 778 if (afp->af_getaddr != NULL) 779 afp->af_getaddr(addr, DSTADDR); 780} 781 782/* 783 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion 784 * of the ifreq structure, which may confuse other parts of ifconfig. 785 * Make a private copy so we can avoid that. 786 */ 787static void 788setifflags(const char *vname, int value, int s, const struct afswtch *afp) 789{ 790 struct ifreq my_ifr; 791 int flags; 792 793 memset(&my_ifr, 0, sizeof(my_ifr)); 794 (void) strlcpy(my_ifr.ifr_name, name, sizeof(my_ifr.ifr_name)); 795 796 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) { 797 Perror("ioctl (SIOCGIFFLAGS)"); 798 exit(1); 799 } 800 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16); 801 802 if (value < 0) { 803 value = -value; 804 flags &= ~value; 805 } else 806 flags |= value; 807 my_ifr.ifr_flags = flags & 0xffff; 808 my_ifr.ifr_flagshigh = flags >> 16; 809 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0) 810 Perror(vname); 811} 812 813void 814setifcap(const char *vname, int value, int s, const struct afswtch *afp) 815{ 816 int flags; 817 818 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) { 819 Perror("ioctl (SIOCGIFCAP)"); 820 exit(1); 821 } 822 flags = ifr.ifr_curcap; 823 if (value < 0) { 824 value = -value; 825 flags &= ~value; 826 } else 827 flags |= value; 828 flags &= ifr.ifr_reqcap; 829 ifr.ifr_reqcap = flags; 830 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0) 831 Perror(vname); 832} 833 834static void 835setifmetric(const char *val, int dummy __unused, int s, 836 const struct afswtch *afp) 837{ 838 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 839 ifr.ifr_metric = atoi(val); 840 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0) 841 warn("ioctl (set metric)"); 842} 843 844static void 845setifmtu(const char *val, int dummy __unused, int s, 846 const struct afswtch *afp) 847{ 848 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name)); 849 ifr.ifr_mtu = atoi(val); 850 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0) 851 warn("ioctl (set mtu)"); 852} 853 854static void 855setifname(const char *val, int dummy __unused, int s, 856 const struct afswtch *afp) 857{ 858 char *newname; 859 860 newname = strdup(val); 861 if (newname == NULL) { 862 warn("no memory to set ifname"); 863 return; 864 } 865 ifr.ifr_data = newname; 866 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) { 867 warn("ioctl (set name)"); 868 free(newname); 869 return; 870 } 871 strlcpy(name, newname, sizeof(name)); 872 free(newname); 873} 874 875/* ARGSUSED */ 876static void 877setifdescr(const char *val, int dummy __unused, int s, 878 const struct afswtch *afp) 879{ 880 char *newdescr; 881 882 ifr.ifr_buffer.length = strlen(val) + 1; 883 if (ifr.ifr_buffer.length == 1) { 884 ifr.ifr_buffer.buffer = newdescr = NULL; 885 ifr.ifr_buffer.length = 0; 886 } else { 887 newdescr = strdup(val); 888 ifr.ifr_buffer.buffer = newdescr; 889 if (newdescr == NULL) { 890 warn("no memory to set ifdescr"); 891 return; 892 } 893 } 894 895 if (ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0) 896 warn("ioctl (set descr)"); 897 898 free(newdescr); 899} 900 901/* ARGSUSED */ 902static void 903unsetifdescr(const char *val, int value, int s, const struct afswtch *afp) 904{ 905 906 setifdescr("", 0, s, 0); 907} 908 909#define IFFBITS \ 910"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \ 911"\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \ 912"\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP" 913 914#define IFCAPBITS \ 915"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \ 916"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \ 917"\17TOE4\20TOE6\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE\25NETMAP" \ 918"\26RXCSUM_IPV6\27TXCSUM_IPV6" 919 920/* 921 * Print the status of the interface. If an address family was 922 * specified, show only it; otherwise, show them all. 923 */ 924static void 925status(const struct afswtch *afp, const struct sockaddr_dl *sdl, 926 struct ifaddrs *ifa) 927{ 928 struct ifaddrs *ift; 929 int allfamilies, s; 930 struct ifstat ifs; 931 932 if (afp == NULL) { 933 allfamilies = 1; 934 ifr.ifr_addr.sa_family = AF_LOCAL; 935 } else { 936 allfamilies = 0; 937 ifr.ifr_addr.sa_family = 938 afp->af_af == AF_LINK ? AF_LOCAL : afp->af_af; 939 } 940 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); 941 942 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0); 943 if (s < 0) 944 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family); 945 946 printf("%s: ", name); 947 printb("flags", ifa->ifa_flags, IFFBITS); 948 if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1) 949 printf(" metric %d", ifr.ifr_metric); 950 if (ioctl(s, SIOCGIFMTU, &ifr) != -1) 951 printf(" mtu %d", ifr.ifr_mtu); 952 putchar('\n'); 953 954 for (;;) { 955 if ((descr = reallocf(descr, descrlen)) != NULL) { 956 ifr.ifr_buffer.buffer = descr; 957 ifr.ifr_buffer.length = descrlen; 958 if (ioctl(s, SIOCGIFDESCR, &ifr) == 0) { 959 if (ifr.ifr_buffer.buffer == descr) { 960 if (strlen(descr) > 0) 961 printf("\tdescription: %s\n", 962 descr); 963 } else if (ifr.ifr_buffer.length > descrlen) { 964 descrlen = ifr.ifr_buffer.length; 965 continue; 966 } 967 } 968 } else 969 warn("unable to allocate memory for interface" 970 "description"); 971 break; 972 } 973 974 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) { 975 if (ifr.ifr_curcap != 0) { 976 printb("\toptions", ifr.ifr_curcap, IFCAPBITS); 977 putchar('\n'); 978 } 979 if (supmedia && ifr.ifr_reqcap != 0) { 980 printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS); 981 putchar('\n'); 982 } 983 } 984 985 tunnel_status(s); 986 987 for (ift = ifa; ift != NULL; ift = ift->ifa_next) { 988 if (ift->ifa_addr == NULL) 989 continue; 990 if (strcmp(ifa->ifa_name, ift->ifa_name) != 0) 991 continue; 992 if (allfamilies) { 993 const struct afswtch *p; 994 p = af_getbyfamily(ift->ifa_addr->sa_family); 995 if (p != NULL && p->af_status != NULL) 996 p->af_status(s, ift); 997 } else if (afp->af_af == ift->ifa_addr->sa_family) 998 afp->af_status(s, ift); 999 } 1000#if 0 1001 if (allfamilies || afp->af_af == AF_LINK) { 1002 const struct afswtch *lafp; 1003 1004 /* 1005 * Hack; the link level address is received separately 1006 * from the routing information so any address is not 1007 * handled above. Cobble together an entry and invoke 1008 * the status method specially. 1009 */ 1010 lafp = af_getbyname("lladdr"); 1011 if (lafp != NULL) { 1012 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl; 1013 lafp->af_status(s, &info); 1014 } 1015 } 1016#endif 1017 if (allfamilies) 1018 af_other_status(s); 1019 else if (afp->af_other_status != NULL) 1020 afp->af_other_status(s); 1021 1022 strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name); 1023 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0) 1024 printf("%s", ifs.ascii); 1025 1026 if (verbose > 0) 1027 sfp_status(s, &ifr, verbose); 1028 1029 close(s); 1030 return; 1031} 1032 1033static void 1034tunnel_status(int s) 1035{ 1036 af_all_tunnel_status(s); 1037} 1038 1039void 1040Perror(const char *cmd) 1041{ 1042 switch (errno) { 1043 1044 case ENXIO: 1045 errx(1, "%s: no such interface", cmd); 1046 break; 1047 1048 case EPERM: 1049 errx(1, "%s: permission denied", cmd); 1050 break; 1051 1052 default: 1053 err(1, "%s", cmd); 1054 } 1055} 1056 1057/* 1058 * Print a value a la the %b format of the kernel's printf 1059 */ 1060void 1061printb(const char *s, unsigned v, const char *bits) 1062{ 1063 int i, any = 0; 1064 char c; 1065 1066 if (bits && *bits == 8) 1067 printf("%s=%o", s, v); 1068 else 1069 printf("%s=%x", s, v); 1070 bits++; 1071 if (bits) { 1072 putchar('<'); 1073 while ((i = *bits++) != '\0') { 1074 if (v & (1 << (i-1))) { 1075 if (any) 1076 putchar(','); 1077 any = 1; 1078 for (; (c = *bits) > 32; bits++) 1079 putchar(c); 1080 } else 1081 for (; *bits > 32; bits++) 1082 ; 1083 } 1084 putchar('>'); 1085 } 1086} 1087 1088void 1089print_vhid(const struct ifaddrs *ifa, const char *s) 1090{ 1091 struct if_data *ifd; 1092 1093 if (ifa->ifa_data == NULL) 1094 return; 1095 1096 ifd = ifa->ifa_data; 1097 if (ifd->ifi_vhid == 0) 1098 return; 1099 1100 printf("vhid %d ", ifd->ifi_vhid); 1101} 1102 1103void 1104ifmaybeload(const char *name) 1105{ 1106#define MOD_PREFIX_LEN 3 /* "if_" */ 1107 struct module_stat mstat; 1108 int fileid, modid; 1109 char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp; 1110 const char *cp; 1111 1112 /* loading suppressed by the user */ 1113 if (noload) 1114 return; 1115 1116 /* trim the interface number off the end */ 1117 strlcpy(ifname, name, sizeof(ifname)); 1118 for (dp = ifname; *dp != 0; dp++) 1119 if (isdigit(*dp)) { 1120 *dp = 0; 1121 break; 1122 } 1123 1124 /* turn interface and unit into module name */ 1125 strlcpy(ifkind, "if_", sizeof(ifkind)); 1126 strlcat(ifkind, ifname, sizeof(ifkind)); 1127 1128 /* scan files in kernel */ 1129 mstat.version = sizeof(struct module_stat); 1130 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) { 1131 /* scan modules in file */ 1132 for (modid = kldfirstmod(fileid); modid > 0; 1133 modid = modfnext(modid)) { 1134 if (modstat(modid, &mstat) < 0) 1135 continue; 1136 /* strip bus name if present */ 1137 if ((cp = strchr(mstat.name, '/')) != NULL) { 1138 cp++; 1139 } else { 1140 cp = mstat.name; 1141 } 1142 /* already loaded? */ 1143 if (strcmp(ifname, cp) == 0 || 1144 strcmp(ifkind, cp) == 0) 1145 return; 1146 } 1147 } 1148 1149 /* not present, we should try to load it */ 1150 kldload(ifkind); 1151} 1152 1153static struct cmd basic_cmds[] = { 1154 DEF_CMD("up", IFF_UP, setifflags), 1155 DEF_CMD("down", -IFF_UP, setifflags), 1156 DEF_CMD("arp", -IFF_NOARP, setifflags), 1157 DEF_CMD("-arp", IFF_NOARP, setifflags), 1158 DEF_CMD("debug", IFF_DEBUG, setifflags), 1159 DEF_CMD("-debug", -IFF_DEBUG, setifflags), 1160 DEF_CMD_ARG("description", setifdescr), 1161 DEF_CMD_ARG("descr", setifdescr), 1162 DEF_CMD("-description", 0, unsetifdescr), 1163 DEF_CMD("-descr", 0, unsetifdescr), 1164 DEF_CMD("promisc", IFF_PPROMISC, setifflags), 1165 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags), 1166 DEF_CMD("add", IFF_UP, notealias), 1167 DEF_CMD("alias", IFF_UP, notealias), 1168 DEF_CMD("-alias", -IFF_UP, notealias), 1169 DEF_CMD("delete", -IFF_UP, notealias), 1170 DEF_CMD("remove", -IFF_UP, notealias), 1171#ifdef notdef 1172#define EN_SWABIPS 0x1000 1173 DEF_CMD("swabips", EN_SWABIPS, setifflags), 1174 DEF_CMD("-swabips", -EN_SWABIPS, setifflags), 1175#endif 1176 DEF_CMD_ARG("netmask", setifnetmask), 1177 DEF_CMD_ARG("metric", setifmetric), 1178 DEF_CMD_ARG("broadcast", setifbroadaddr), 1179 DEF_CMD_ARG("ipdst", setifipdst), 1180 DEF_CMD_ARG2("tunnel", settunnel), 1181 DEF_CMD("-tunnel", 0, deletetunnel), 1182 DEF_CMD("deletetunnel", 0, deletetunnel), 1183#ifdef JAIL 1184 DEF_CMD_ARG("vnet", setifvnet), 1185 DEF_CMD_ARG("-vnet", setifrvnet), 1186#endif 1187 DEF_CMD("link0", IFF_LINK0, setifflags), 1188 DEF_CMD("-link0", -IFF_LINK0, setifflags), 1189 DEF_CMD("link1", IFF_LINK1, setifflags), 1190 DEF_CMD("-link1", -IFF_LINK1, setifflags), 1191 DEF_CMD("link2", IFF_LINK2, setifflags), 1192 DEF_CMD("-link2", -IFF_LINK2, setifflags), 1193 DEF_CMD("monitor", IFF_MONITOR, setifflags), 1194 DEF_CMD("-monitor", -IFF_MONITOR, setifflags), 1195 DEF_CMD("staticarp", IFF_STATICARP, setifflags), 1196 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags), 1197 DEF_CMD("rxcsum6", IFCAP_RXCSUM_IPV6, setifcap), 1198 DEF_CMD("-rxcsum6", -IFCAP_RXCSUM_IPV6, setifcap), 1199 DEF_CMD("txcsum6", IFCAP_TXCSUM_IPV6, setifcap), 1200 DEF_CMD("-txcsum6", -IFCAP_TXCSUM_IPV6, setifcap), 1201 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap), 1202 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap), 1203 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap), 1204 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap), 1205 DEF_CMD("netcons", IFCAP_NETCONS, setifcap), 1206 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap), 1207 DEF_CMD("polling", IFCAP_POLLING, setifcap), 1208 DEF_CMD("-polling", -IFCAP_POLLING, setifcap), 1209 DEF_CMD("tso6", IFCAP_TSO6, setifcap), 1210 DEF_CMD("-tso6", -IFCAP_TSO6, setifcap), 1211 DEF_CMD("tso4", IFCAP_TSO4, setifcap), 1212 DEF_CMD("-tso4", -IFCAP_TSO4, setifcap), 1213 DEF_CMD("tso", IFCAP_TSO, setifcap), 1214 DEF_CMD("-tso", -IFCAP_TSO, setifcap), 1215 DEF_CMD("toe", IFCAP_TOE, setifcap), 1216 DEF_CMD("-toe", -IFCAP_TOE, setifcap), 1217 DEF_CMD("lro", IFCAP_LRO, setifcap), 1218 DEF_CMD("-lro", -IFCAP_LRO, setifcap), 1219 DEF_CMD("wol", IFCAP_WOL, setifcap), 1220 DEF_CMD("-wol", -IFCAP_WOL, setifcap), 1221 DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap), 1222 DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap), 1223 DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap), 1224 DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap), 1225 DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap), 1226 DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap), 1227 DEF_CMD("normal", -IFF_LINK0, setifflags), 1228 DEF_CMD("compress", IFF_LINK0, setifflags), 1229 DEF_CMD("noicmp", IFF_LINK1, setifflags), 1230 DEF_CMD_ARG("mtu", setifmtu), 1231 DEF_CMD_ARG("name", setifname), 1232}; 1233 1234static __constructor void 1235ifconfig_ctor(void) 1236{ 1237 size_t i; 1238 1239 for (i = 0; i < nitems(basic_cmds); i++) 1240 cmd_register(&basic_cmds[i]); 1241} 1242