1 /*- 2 * Copyright (c) 1982, 1986, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (C) 2001 WIDE Project. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 4. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#)in.c 8.4 (Berkeley) 1/9/95 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "opt_mpath.h" 37 38 #include <sys/param.h> 39 #include <sys/eventhandler.h> 40 #include <sys/systm.h> 41 #include <sys/sockio.h> 42 #include <sys/malloc.h> 43 #include <sys/priv.h> 44 #include <sys/socket.h> 45 #include <sys/jail.h> 46 #include <sys/kernel.h> 47 #include <sys/proc.h> 48 #include <sys/sysctl.h> 49 #include <sys/syslog.h> 50 #include <sys/sx.h> 51 52 #include <net/if.h> 53 #include <net/if_var.h> 54 #include <net/if_arp.h> 55 #include <net/if_dl.h> 56 #include <net/if_llatbl.h> 57 #include <net/if_types.h> 58 #include <net/route.h> 59 #include <net/vnet.h> 60 61 #include <netinet/if_ether.h> 62 #include <netinet/in.h> 63 #include <netinet/in_var.h> 64 #include <netinet/in_pcb.h> 65 #include <netinet/ip_var.h> 66 #include <netinet/ip_carp.h> 67 #include <netinet/igmp_var.h> 68 #include <netinet/udp.h> 69 #include <netinet/udp_var.h> 70 71 static int in_aifaddr_ioctl(u_long, caddr_t, struct ifnet *, struct thread *); 72 static int in_difaddr_ioctl(caddr_t, struct ifnet *, struct thread *); 73 74 static void in_socktrim(struct sockaddr_in *); 75 static void in_purgemaddrs(struct ifnet *); 76 77 static VNET_DEFINE(int, nosameprefix); 78 #define V_nosameprefix VNET(nosameprefix) 79 SYSCTL_VNET_INT(_net_inet_ip, OID_AUTO, no_same_prefix, CTLFLAG_RW, 80 &VNET_NAME(nosameprefix), 0, 81 "Refuse to create same prefixes on different interfaces"); 82 83 VNET_DECLARE(struct inpcbinfo, ripcbinfo); 84 #define V_ripcbinfo VNET(ripcbinfo) 85 86 static struct sx in_control_sx; 87 SX_SYSINIT(in_control_sx, &in_control_sx, "in_control"); 88 89 /* 90 * Return 1 if an internet address is for a ``local'' host 91 * (one to which we have a connection). 92 */ 93 int 94 in_localaddr(struct in_addr in) 95 { 96 register u_long i = ntohl(in.s_addr); 97 register struct in_ifaddr *ia; 98 99 IN_IFADDR_RLOCK(); 100 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 101 if ((i & ia->ia_subnetmask) == ia->ia_subnet) { 102 IN_IFADDR_RUNLOCK(); 103 return (1); 104 } 105 } 106 IN_IFADDR_RUNLOCK(); 107 return (0); 108 } 109 110 /* 111 * Return 1 if an internet address is for the local host and configured 112 * on one of its interfaces. 113 */ 114 int 115 in_localip(struct in_addr in) 116 { 117 struct in_ifaddr *ia; 118 119 IN_IFADDR_RLOCK(); 120 LIST_FOREACH(ia, INADDR_HASH(in.s_addr), ia_hash) { 121 if (IA_SIN(ia)->sin_addr.s_addr == in.s_addr) { 122 IN_IFADDR_RUNLOCK(); 123 return (1); 124 } 125 } 126 IN_IFADDR_RUNLOCK(); 127 return (0); 128 } 129 130 /* 131 * Return a reference to the interface address which is different to 132 * the supplied one but with same IP address value. 133 */ 134 static struct in_ifaddr * 135 in_localip_more(struct in_ifaddr *ia) 136 { 137 in_addr_t in = IA_SIN(ia)->sin_addr.s_addr; 138 struct in_ifaddr *it; 139 140 IN_IFADDR_RLOCK(); 141 LIST_FOREACH(it, INADDR_HASH(in), ia_hash) { 142 if (it != ia && IA_SIN(it)->sin_addr.s_addr == in) { 143 ifa_ref(&it->ia_ifa); 144 IN_IFADDR_RUNLOCK(); 145 return (it); 146 } 147 } 148 IN_IFADDR_RUNLOCK(); 149 150 return (NULL); 151 } 152 153 /* 154 * Determine whether an IP address is in a reserved set of addresses 155 * that may not be forwarded, or whether datagrams to that destination 156 * may be forwarded. 157 */ 158 int 159 in_canforward(struct in_addr in) 160 { 161 register u_long i = ntohl(in.s_addr); 162 register u_long net; 163 164 if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i) || IN_LINKLOCAL(i)) 165 return (0); 166 if (IN_CLASSA(i)) { 167 net = i & IN_CLASSA_NET; 168 if (net == 0 || net == (IN_LOOPBACKNET << IN_CLASSA_NSHIFT)) 169 return (0); 170 } 171 return (1); 172 } 173 174 /* 175 * Trim a mask in a sockaddr 176 */ 177 static void 178 in_socktrim(struct sockaddr_in *ap) 179 { 180 register char *cplim = (char *) &ap->sin_addr; 181 register char *cp = (char *) (&ap->sin_addr + 1); 182 183 ap->sin_len = 0; 184 while (--cp >= cplim) 185 if (*cp) { 186 (ap)->sin_len = cp - (char *) (ap) + 1; 187 break; 188 } 189 } 190 191 /* 192 * Generic internet control operations (ioctl's). 193 */ 194 int 195 in_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp, 196 struct thread *td) 197 { 198 struct ifreq *ifr = (struct ifreq *)data; 199 struct sockaddr_in *addr = (struct sockaddr_in *)&ifr->ifr_addr; 200 struct ifaddr *ifa; 201 struct in_ifaddr *ia; 202 int error; 203 204 if (ifp == NULL) 205 return (EADDRNOTAVAIL); 206 207 /* 208 * Filter out 4 ioctls we implement directly. Forward the rest 209 * to specific functions and ifp->if_ioctl(). 210 */ 211 switch (cmd) { 212 case SIOCGIFADDR: 213 case SIOCGIFBRDADDR: 214 case SIOCGIFDSTADDR: 215 case SIOCGIFNETMASK: 216 break; 217 case SIOCDIFADDR: 218 sx_xlock(&in_control_sx); 219 error = in_difaddr_ioctl(data, ifp, td); 220 sx_xunlock(&in_control_sx); 221 return (error); 222 case OSIOCAIFADDR: /* 9.x compat */ 223 case SIOCAIFADDR: 224 sx_xlock(&in_control_sx); 225 error = in_aifaddr_ioctl(cmd, data, ifp, td); 226 sx_xunlock(&in_control_sx); 227 return (error); 228 case SIOCSIFADDR: 229 case SIOCSIFBRDADDR: 230 case SIOCSIFDSTADDR: 231 case SIOCSIFNETMASK: 232 /* We no longer support that old commands. */ 233 return (EINVAL); 234 default: 235 if (ifp->if_ioctl == NULL) 236 return (EOPNOTSUPP); 237 return ((*ifp->if_ioctl)(ifp, cmd, data)); 238 } 239 240 if (addr->sin_addr.s_addr != INADDR_ANY && 241 prison_check_ip4(td->td_ucred, &addr->sin_addr) != 0) 242 return (EADDRNOTAVAIL); 243 244 /* 245 * For SIOCGIFADDR, pick the first address. For the rest of 246 * ioctls, try to find specified address. 247 */ 248 IF_ADDR_RLOCK(ifp); 249 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 250 if (ifa->ifa_addr->sa_family != AF_INET) 251 continue; 252 ia = (struct in_ifaddr *)ifa; 253 if (cmd == SIOCGIFADDR || addr->sin_addr.s_addr == INADDR_ANY) 254 break; 255 if (ia->ia_addr.sin_addr.s_addr == addr->sin_addr.s_addr) 256 break; 257 } 258 259 if (ifa == NULL) { 260 IF_ADDR_RUNLOCK(ifp); 261 return (EADDRNOTAVAIL); 262 } 263 264 error = 0; 265 switch (cmd) { 266 case SIOCGIFADDR: 267 *addr = ia->ia_addr; 268 break; 269 270 case SIOCGIFBRDADDR: 271 if ((ifp->if_flags & IFF_BROADCAST) == 0) { 272 error = EINVAL; 273 break; 274 } 275 *addr = ia->ia_broadaddr; 276 break; 277 278 case SIOCGIFDSTADDR: 279 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) { 280 error = EINVAL; 281 break; 282 } 283 *addr = ia->ia_dstaddr; 284 break; 285 286 case SIOCGIFNETMASK: 287 *addr = ia->ia_sockmask; 288 break; 289 } 290 291 IF_ADDR_RUNLOCK(ifp); 292 293 return (error); 294 } 295 296 static int 297 in_aifaddr_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp, struct thread *td) 298 { 299 const struct in_aliasreq *ifra = (struct in_aliasreq *)data; 300 const struct sockaddr_in *addr = &ifra->ifra_addr; 301 const struct sockaddr_in *broadaddr = &ifra->ifra_broadaddr; 302 const struct sockaddr_in *mask = &ifra->ifra_mask; 303 const struct sockaddr_in *dstaddr = &ifra->ifra_dstaddr; 304 const int vhid = (cmd == SIOCAIFADDR) ? ifra->ifra_vhid : 0; 305 struct ifaddr *ifa; 306 struct in_ifaddr *ia; 307 bool iaIsFirst; 308 int error = 0; 309 310 error = priv_check(td, PRIV_NET_ADDIFADDR); 311 if (error) 312 return (error); 313 314 /* 315 * ifra_addr must be present and be of INET family. 316 * ifra_broadaddr/ifra_dstaddr and ifra_mask are optional. 317 */ 318 if (addr->sin_len != sizeof(struct sockaddr_in) || 319 addr->sin_family != AF_INET) 320 return (EINVAL); 321 if (broadaddr->sin_len != 0 && 322 (broadaddr->sin_len != sizeof(struct sockaddr_in) || 323 broadaddr->sin_family != AF_INET)) 324 return (EINVAL); 325 if (mask->sin_len != 0 && 326 (mask->sin_len != sizeof(struct sockaddr_in) || 327 mask->sin_family != AF_INET)) 328 return (EINVAL); 329 if ((ifp->if_flags & IFF_POINTOPOINT) && 330 (dstaddr->sin_len != sizeof(struct sockaddr_in) || 331 dstaddr->sin_addr.s_addr == INADDR_ANY)) 332 return (EDESTADDRREQ); 333 if (vhid > 0 && carp_attach_p == NULL) 334 return (EPROTONOSUPPORT); 335 336 /* 337 * See whether address already exist. 338 */ 339 iaIsFirst = true; 340 ia = NULL; 341 IF_ADDR_RLOCK(ifp); 342 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 343 struct in_ifaddr *it; 344 345 if (ifa->ifa_addr->sa_family != AF_INET) 346 continue; 347 348 it = (struct in_ifaddr *)ifa; 349 iaIsFirst = false; 350 if (it->ia_addr.sin_addr.s_addr == addr->sin_addr.s_addr && 351 prison_check_ip4(td->td_ucred, &addr->sin_addr) == 0) 352 ia = it; 353 } 354 IF_ADDR_RUNLOCK(ifp); 355 356 if (ia != NULL) 357 (void )in_difaddr_ioctl(data, ifp, td); 358 359 ifa = ifa_alloc(sizeof(struct in_ifaddr), M_WAITOK); 360 ia = (struct in_ifaddr *)ifa; 361 ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr; 362 ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 363 ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask; 364 365 ia->ia_ifp = ifp; 366 ia->ia_ifa.ifa_metric = ifp->if_metric; 367 ia->ia_addr = *addr; 368 if (mask->sin_len != 0) { 369 ia->ia_sockmask = *mask; 370 ia->ia_subnetmask = ntohl(ia->ia_sockmask.sin_addr.s_addr); 371 } else { 372 in_addr_t i = ntohl(addr->sin_addr.s_addr); 373 374 /* 375 * Be compatible with network classes, if netmask isn't 376 * supplied, guess it based on classes. 377 */ 378 if (IN_CLASSA(i)) 379 ia->ia_subnetmask = IN_CLASSA_NET; 380 else if (IN_CLASSB(i)) 381 ia->ia_subnetmask = IN_CLASSB_NET; 382 else 383 ia->ia_subnetmask = IN_CLASSC_NET; 384 ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask); 385 } 386 ia->ia_subnet = ntohl(addr->sin_addr.s_addr) & ia->ia_subnetmask; 387 in_socktrim(&ia->ia_sockmask); 388 389 if (ifp->if_flags & IFF_BROADCAST) { 390 if (broadaddr->sin_len != 0) { 391 ia->ia_broadaddr = *broadaddr; 392 } else if (ia->ia_subnetmask == IN_RFC3021_MASK) { 393 ia->ia_broadaddr.sin_addr.s_addr = INADDR_BROADCAST; 394 ia->ia_broadaddr.sin_len = sizeof(struct sockaddr_in); 395 ia->ia_broadaddr.sin_family = AF_INET; 396 } else { 397 ia->ia_broadaddr.sin_addr.s_addr = 398 htonl(ia->ia_subnet | ~ia->ia_subnetmask); 399 ia->ia_broadaddr.sin_len = sizeof(struct sockaddr_in); 400 ia->ia_broadaddr.sin_family = AF_INET; 401 } 402 } 403 404 if (ifp->if_flags & IFF_POINTOPOINT) 405 ia->ia_dstaddr = *dstaddr; 406 407 /* XXXGL: rtinit() needs this strange assignment. */ 408 if (ifp->if_flags & IFF_LOOPBACK) 409 ia->ia_dstaddr = ia->ia_addr; 410 411 ifa_ref(ifa); /* if_addrhead */ 412 IF_ADDR_WLOCK(ifp); 413 TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link); 414 IF_ADDR_WUNLOCK(ifp); 415 416 ifa_ref(ifa); /* in_ifaddrhead */ 417 IN_IFADDR_WLOCK(); 418 TAILQ_INSERT_TAIL(&V_in_ifaddrhead, ia, ia_link); 419 LIST_INSERT_HEAD(INADDR_HASH(ia->ia_addr.sin_addr.s_addr), ia, ia_hash); 420 IN_IFADDR_WUNLOCK(); 421 422 if (vhid != 0) 423 error = (*carp_attach_p)(&ia->ia_ifa, vhid); 424 if (error) 425 goto fail1; 426 427 /* 428 * Give the interface a chance to initialize 429 * if this is its first address, 430 * and to validate the address if necessary. 431 */ 432 if (ifp->if_ioctl != NULL) 433 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 434 if (error) 435 goto fail2; 436 437 /* 438 * Add route for the network. 439 */ 440 if (vhid == 0) { 441 int flags = RTF_UP; 442 443 if (ifp->if_flags & (IFF_LOOPBACK|IFF_POINTOPOINT)) 444 flags |= RTF_HOST; 445 446 error = in_addprefix(ia, flags); 447 if (error) 448 goto fail2; 449 } 450 451 /* 452 * Add a loopback route to self. 453 */ 454 if (vhid == 0 && (ifp->if_flags & IFF_LOOPBACK) == 0 && 455 ia->ia_addr.sin_addr.s_addr != INADDR_ANY && 456 !((ifp->if_flags & IFF_POINTOPOINT) && 457 ia->ia_dstaddr.sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr)) { 458 struct in_ifaddr *eia; 459 460 eia = in_localip_more(ia); 461 462 if (eia == NULL) { 463 error = ifa_add_loopback_route((struct ifaddr *)ia, 464 (struct sockaddr *)&ia->ia_addr); 465 if (error) 466 goto fail3; 467 } else 468 ifa_free(&eia->ia_ifa); 469 } 470 471 if (iaIsFirst && (ifp->if_flags & IFF_MULTICAST)) { 472 struct in_addr allhosts_addr; 473 struct in_ifinfo *ii; 474 475 ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 476 allhosts_addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP); 477 478 error = in_joingroup(ifp, &allhosts_addr, NULL, 479 &ii->ii_allhosts); 480 } 481 482 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 483 484 return (error); 485 486 fail3: 487 if (vhid == 0) 488 (void )in_scrubprefix(ia, LLE_STATIC); 489 490 fail2: 491 if (ia->ia_ifa.ifa_carp) 492 (*carp_detach_p)(&ia->ia_ifa); 493 494 fail1: 495 IF_ADDR_WLOCK(ifp); 496 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 497 IF_ADDR_WUNLOCK(ifp); 498 ifa_free(&ia->ia_ifa); 499 500 IN_IFADDR_WLOCK(); 501 TAILQ_REMOVE(&V_in_ifaddrhead, ia, ia_link); 502 LIST_REMOVE(ia, ia_hash); 503 IN_IFADDR_WUNLOCK(); 504 ifa_free(&ia->ia_ifa); 505 506 return (error); 507 } 508 509 static int 510 in_difaddr_ioctl(caddr_t data, struct ifnet *ifp, struct thread *td) 511 { 512 const struct ifreq *ifr = (struct ifreq *)data; 513 const struct sockaddr_in *addr = (const struct sockaddr_in *) 514 &ifr->ifr_addr; 515 struct ifaddr *ifa; 516 struct in_ifaddr *ia; 517 bool deleteAny, iaIsLast; 518 int error; 519 520 if (td != NULL) { 521 error = priv_check(td, PRIV_NET_DELIFADDR); 522 if (error) 523 return (error); 524 } 525 526 if (addr->sin_len != sizeof(struct sockaddr_in) || 527 addr->sin_family != AF_INET) 528 deleteAny = true; 529 else 530 deleteAny = false; 531 532 iaIsLast = true; 533 ia = NULL; 534 IF_ADDR_WLOCK(ifp); 535 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 536 struct in_ifaddr *it; 537 538 if (ifa->ifa_addr->sa_family != AF_INET) 539 continue; 540 541 it = (struct in_ifaddr *)ifa; 542 if (deleteAny && ia == NULL && (td == NULL || 543 prison_check_ip4(td->td_ucred, &it->ia_addr.sin_addr) == 0)) 544 ia = it; 545 546 if (it->ia_addr.sin_addr.s_addr == addr->sin_addr.s_addr && 547 (td == NULL || prison_check_ip4(td->td_ucred, 548 &addr->sin_addr) == 0)) 549 ia = it; 550 551 if (it != ia) 552 iaIsLast = false; 553 } 554 555 if (ia == NULL) { 556 IF_ADDR_WUNLOCK(ifp); 557 return (EADDRNOTAVAIL); 558 } 559 560 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 561 IF_ADDR_WUNLOCK(ifp); 562 ifa_free(&ia->ia_ifa); /* if_addrhead */ 563 564 IN_IFADDR_WLOCK(); 565 TAILQ_REMOVE(&V_in_ifaddrhead, ia, ia_link); 566 LIST_REMOVE(ia, ia_hash); 567 IN_IFADDR_WUNLOCK(); 568 ifa_free(&ia->ia_ifa); /* in_ifaddrhead */ 569 570 /* 571 * in_scrubprefix() kills the interface route. 572 */ 573 in_scrubprefix(ia, LLE_STATIC); 574 575 /* 576 * in_ifadown gets rid of all the rest of 577 * the routes. This is not quite the right 578 * thing to do, but at least if we are running 579 * a routing process they will come back. 580 */ 581 in_ifadown(&ia->ia_ifa, 1); 582 583 if (ia->ia_ifa.ifa_carp) 584 (*carp_detach_p)(&ia->ia_ifa); 585 586 /* 587 * If this is the last IPv4 address configured on this 588 * interface, leave the all-hosts group. 589 * No state-change report need be transmitted. 590 */ 591 if (iaIsLast && (ifp->if_flags & IFF_MULTICAST)) { 592 struct in_ifinfo *ii; 593 594 ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 595 IN_MULTI_LOCK(); 596 if (ii->ii_allhosts) { 597 (void)in_leavegroup_locked(ii->ii_allhosts, NULL); 598 ii->ii_allhosts = NULL; 599 } 600 IN_MULTI_UNLOCK(); 601 } 602 603 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 604 605 return (0); 606 } 607 608 #define rtinitflags(x) \ 609 ((((x)->ia_ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) != 0) \ 610 ? RTF_HOST : 0) 611 612 /* 613 * Generate a routing message when inserting or deleting 614 * an interface address alias. 615 */ 616 static void in_addralias_rtmsg(int cmd, struct in_addr *prefix, 617 struct in_ifaddr *target) 618 { 619 struct route pfx_ro; 620 struct sockaddr_in *pfx_addr; 621 struct rtentry msg_rt; 622 623 /* QL: XXX 624 * This is a bit questionable because there is no 625 * additional route entry added/deleted for an address 626 * alias. Therefore this route report is inaccurate. 627 */ 628 bzero(&pfx_ro, sizeof(pfx_ro)); 629 pfx_addr = (struct sockaddr_in *)(&pfx_ro.ro_dst); 630 pfx_addr->sin_len = sizeof(*pfx_addr); 631 pfx_addr->sin_family = AF_INET; 632 pfx_addr->sin_addr = *prefix; 633 rtalloc_ign_fib(&pfx_ro, 0, 0); 634 if (pfx_ro.ro_rt != NULL) { 635 msg_rt = *pfx_ro.ro_rt; 636 637 /* QL: XXX 638 * Point the gateway to the new interface 639 * address as if a new prefix route entry has 640 * been added through the new address alias. 641 * All other parts of the rtentry is accurate, 642 * e.g., rt_key, rt_mask, rt_ifp etc. 643 */ 644 msg_rt.rt_gateway = (struct sockaddr *)&target->ia_addr; 645 rt_newaddrmsg(cmd, (struct ifaddr *)target, 0, &msg_rt); 646 RTFREE(pfx_ro.ro_rt); 647 } 648 return; 649 } 650 651 /* 652 * Check if we have a route for the given prefix already or add one accordingly. 653 */ 654 int 655 in_addprefix(struct in_ifaddr *target, int flags) 656 { 657 struct in_ifaddr *ia; 658 struct in_addr prefix, mask, p, m; 659 int error; 660 661 if ((flags & RTF_HOST) != 0) { 662 prefix = target->ia_dstaddr.sin_addr; 663 mask.s_addr = 0; 664 } else { 665 prefix = target->ia_addr.sin_addr; 666 mask = target->ia_sockmask.sin_addr; 667 prefix.s_addr &= mask.s_addr; 668 } 669 670 IN_IFADDR_RLOCK(); 671 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 672 if (rtinitflags(ia)) { 673 p = ia->ia_dstaddr.sin_addr; 674 675 if (prefix.s_addr != p.s_addr) 676 continue; 677 } else { 678 p = ia->ia_addr.sin_addr; 679 m = ia->ia_sockmask.sin_addr; 680 p.s_addr &= m.s_addr; 681 682 if (prefix.s_addr != p.s_addr || 683 mask.s_addr != m.s_addr) 684 continue; 685 } 686 687 /* 688 * If we got a matching prefix route inserted by other 689 * interface address, we are done here. 690 */ 691 if (ia->ia_flags & IFA_ROUTE) { 692 #ifdef RADIX_MPATH 693 if (ia->ia_addr.sin_addr.s_addr == 694 target->ia_addr.sin_addr.s_addr) { 695 IN_IFADDR_RUNLOCK(); 696 return (EEXIST); 697 } else 698 break; 699 #endif 700 if (V_nosameprefix) { 701 IN_IFADDR_RUNLOCK(); 702 return (EEXIST); 703 } else { 704 in_addralias_rtmsg(RTM_ADD, &prefix, target); 705 IN_IFADDR_RUNLOCK(); 706 return (0); 707 } 708 } 709 } 710 IN_IFADDR_RUNLOCK(); 711 712 /* 713 * No-one seem to have this prefix route, so we try to insert it. 714 */ 715 error = rtinit(&target->ia_ifa, (int)RTM_ADD, flags); 716 if (!error) 717 target->ia_flags |= IFA_ROUTE; 718 return (error); 719 } 720 721 /* 722 * If there is no other address in the system that can serve a route to the 723 * same prefix, remove the route. Hand over the route to the new address 724 * otherwise. 725 */ 726 int 727 in_scrubprefix(struct in_ifaddr *target, u_int flags) 728 { 729 struct in_ifaddr *ia; 730 struct in_addr prefix, mask, p, m; 731 int error = 0; 732 struct sockaddr_in prefix0, mask0; 733 734 /* 735 * Remove the loopback route to the interface address. 736 */ 737 if ((target->ia_addr.sin_addr.s_addr != INADDR_ANY) && 738 !(target->ia_ifp->if_flags & IFF_LOOPBACK) && 739 (flags & LLE_STATIC)) { 740 struct in_ifaddr *eia; 741 742 eia = in_localip_more(target); 743 744 if (eia != NULL) { 745 error = ifa_switch_loopback_route((struct ifaddr *)eia, 746 (struct sockaddr *)&target->ia_addr); 747 ifa_free(&eia->ia_ifa); 748 } else { 749 error = ifa_del_loopback_route((struct ifaddr *)target, 750 (struct sockaddr *)&target->ia_addr); 751 } 752 753 if (!(target->ia_ifp->if_flags & IFF_NOARP)) 754 /* remove arp cache */ 755 arp_ifscrub(target->ia_ifp, 756 IA_SIN(target)->sin_addr.s_addr); 757 } 758 759 if (rtinitflags(target)) { 760 prefix = target->ia_dstaddr.sin_addr; 761 mask.s_addr = 0; 762 } else { 763 prefix = target->ia_addr.sin_addr; 764 mask = target->ia_sockmask.sin_addr; 765 prefix.s_addr &= mask.s_addr; 766 } 767 768 if ((target->ia_flags & IFA_ROUTE) == 0) { 769 in_addralias_rtmsg(RTM_DELETE, &prefix, target); 770 return (0); 771 } 772 773 IN_IFADDR_RLOCK(); 774 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 775 if (rtinitflags(ia)) { 776 p = ia->ia_dstaddr.sin_addr; 777 778 if (prefix.s_addr != p.s_addr) 779 continue; 780 } else { 781 p = ia->ia_addr.sin_addr; 782 m = ia->ia_sockmask.sin_addr; 783 p.s_addr &= m.s_addr; 784 785 if (prefix.s_addr != p.s_addr || 786 mask.s_addr != m.s_addr) 787 continue; 788 } 789 790 if ((ia->ia_ifp->if_flags & IFF_UP) == 0) 791 continue; 792 793 /* 794 * If we got a matching prefix address, move IFA_ROUTE and 795 * the route itself to it. Make sure that routing daemons 796 * get a heads-up. 797 */ 798 if ((ia->ia_flags & IFA_ROUTE) == 0) { 799 ifa_ref(&ia->ia_ifa); 800 IN_IFADDR_RUNLOCK(); 801 error = rtinit(&(target->ia_ifa), (int)RTM_DELETE, 802 rtinitflags(target)); 803 if (error == 0) 804 target->ia_flags &= ~IFA_ROUTE; 805 else 806 log(LOG_INFO, "in_scrubprefix: err=%d, old prefix delete failed\n", 807 error); 808 error = rtinit(&ia->ia_ifa, (int)RTM_ADD, 809 rtinitflags(ia) | RTF_UP); 810 if (error == 0) 811 ia->ia_flags |= IFA_ROUTE; 812 else 813 log(LOG_INFO, "in_scrubprefix: err=%d, new prefix add failed\n", 814 error); 815 ifa_free(&ia->ia_ifa); 816 return (error); 817 } 818 } 819 IN_IFADDR_RUNLOCK(); 820 821 /* 822 * remove all L2 entries on the given prefix 823 */ 824 bzero(&prefix0, sizeof(prefix0)); 825 prefix0.sin_len = sizeof(prefix0); 826 prefix0.sin_family = AF_INET; 827 prefix0.sin_addr.s_addr = target->ia_subnet; 828 bzero(&mask0, sizeof(mask0)); 829 mask0.sin_len = sizeof(mask0); 830 mask0.sin_family = AF_INET; 831 mask0.sin_addr.s_addr = target->ia_subnetmask; 832 lltable_prefix_free(AF_INET, (struct sockaddr *)&prefix0, 833 (struct sockaddr *)&mask0, flags); 834 835 /* 836 * As no-one seem to have this prefix, we can remove the route. 837 */ 838 error = rtinit(&(target->ia_ifa), (int)RTM_DELETE, rtinitflags(target)); 839 if (error == 0) 840 target->ia_flags &= ~IFA_ROUTE; 841 else 842 log(LOG_INFO, "in_scrubprefix: err=%d, prefix delete failed\n", error); 843 return (error); 844 } 845 846 #undef rtinitflags 847 848 /* 849 * Return 1 if the address might be a local broadcast address. 850 */ 851 int 852 in_broadcast(struct in_addr in, struct ifnet *ifp) 853 { 854 register struct ifaddr *ifa; 855 u_long t; 856 857 if (in.s_addr == INADDR_BROADCAST || 858 in.s_addr == INADDR_ANY) 859 return (1); 860 if ((ifp->if_flags & IFF_BROADCAST) == 0) 861 return (0); 862 t = ntohl(in.s_addr); 863 /* 864 * Look through the list of addresses for a match 865 * with a broadcast address. 866 */ 867 #define ia ((struct in_ifaddr *)ifa) 868 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 869 if (ifa->ifa_addr->sa_family == AF_INET && 870 (in.s_addr == ia->ia_broadaddr.sin_addr.s_addr || 871 /* 872 * Check for old-style (host 0) broadcast, but 873 * taking into account that RFC 3021 obsoletes it. 874 */ 875 (ia->ia_subnetmask != IN_RFC3021_MASK && 876 t == ia->ia_subnet)) && 877 /* 878 * Check for an all one subnetmask. These 879 * only exist when an interface gets a secondary 880 * address. 881 */ 882 ia->ia_subnetmask != (u_long)0xffffffff) 883 return (1); 884 return (0); 885 #undef ia 886 } 887 888 /* 889 * On interface removal, clean up IPv4 data structures hung off of the ifnet. 890 */ 891 void 892 in_ifdetach(struct ifnet *ifp) 893 { 894 895 in_pcbpurgeif0(&V_ripcbinfo, ifp); 896 in_pcbpurgeif0(&V_udbinfo, ifp); 897 in_purgemaddrs(ifp); 898 } 899 900 /* 901 * Delete all IPv4 multicast address records, and associated link-layer 902 * multicast address records, associated with ifp. 903 * XXX It looks like domifdetach runs AFTER the link layer cleanup. 904 * XXX This should not race with ifma_protospec being set during 905 * a new allocation, if it does, we have bigger problems. 906 */ 907 static void 908 in_purgemaddrs(struct ifnet *ifp) 909 { 910 LIST_HEAD(,in_multi) purgeinms; 911 struct in_multi *inm, *tinm; 912 struct ifmultiaddr *ifma; 913 914 LIST_INIT(&purgeinms); 915 IN_MULTI_LOCK(); 916 917 /* 918 * Extract list of in_multi associated with the detaching ifp 919 * which the PF_INET layer is about to release. 920 * We need to do this as IF_ADDR_LOCK() may be re-acquired 921 * by code further down. 922 */ 923 IF_ADDR_RLOCK(ifp); 924 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 925 if (ifma->ifma_addr->sa_family != AF_INET || 926 ifma->ifma_protospec == NULL) 927 continue; 928 #if 0 929 KASSERT(ifma->ifma_protospec != NULL, 930 ("%s: ifma_protospec is NULL", __func__)); 931 #endif 932 inm = (struct in_multi *)ifma->ifma_protospec; 933 LIST_INSERT_HEAD(&purgeinms, inm, inm_link); 934 } 935 IF_ADDR_RUNLOCK(ifp); 936 937 LIST_FOREACH_SAFE(inm, &purgeinms, inm_link, tinm) { 938 LIST_REMOVE(inm, inm_link); 939 inm_release_locked(inm); 940 } 941 igmp_ifdetach(ifp); 942 943 IN_MULTI_UNLOCK(); 944 } 945 946 struct in_llentry { 947 struct llentry base; 948 struct sockaddr_in l3_addr4; 949 }; 950 951 /* 952 * Deletes an address from the address table. 953 * This function is called by the timer functions 954 * such as arptimer() and nd6_llinfo_timer(), and 955 * the caller does the locking. 956 */ 957 static void 958 in_lltable_free(struct lltable *llt, struct llentry *lle) 959 { 960 LLE_WUNLOCK(lle); 961 LLE_LOCK_DESTROY(lle); 962 free(lle, M_LLTABLE); 963 } 964 965 static struct llentry * 966 in_lltable_new(const struct sockaddr *l3addr, u_int flags) 967 { 968 struct in_llentry *lle; 969 970 lle = malloc(sizeof(struct in_llentry), M_LLTABLE, M_NOWAIT | M_ZERO); 971 if (lle == NULL) /* NB: caller generates msg */ 972 return NULL; 973 974 /* 975 * For IPv4 this will trigger "arpresolve" to generate 976 * an ARP request. 977 */ 978 lle->base.la_expire = time_uptime; /* mark expired */ 979 lle->l3_addr4 = *(const struct sockaddr_in *)l3addr; 980 lle->base.lle_refcnt = 1; 981 lle->base.lle_free = in_lltable_free; 982 LLE_LOCK_INIT(&lle->base); 983 callout_init_rw(&lle->base.la_timer, &lle->base.lle_lock, 984 CALLOUT_RETURNUNLOCKED); 985 986 return (&lle->base); 987 } 988 989 #define IN_ARE_MASKED_ADDR_EQUAL(d, a, m) ( \ 990 (((ntohl((d)->sin_addr.s_addr) ^ (a)->sin_addr.s_addr) & (m)->sin_addr.s_addr)) == 0 ) 991 992 static void 993 in_lltable_prefix_free(struct lltable *llt, const struct sockaddr *prefix, 994 const struct sockaddr *mask, u_int flags) 995 { 996 const struct sockaddr_in *pfx = (const struct sockaddr_in *)prefix; 997 const struct sockaddr_in *msk = (const struct sockaddr_in *)mask; 998 struct llentry *lle, *next; 999 int i; 1000 size_t pkts_dropped; 1001 1002 IF_AFDATA_WLOCK(llt->llt_ifp); 1003 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 1004 LIST_FOREACH_SAFE(lle, &llt->lle_head[i], lle_next, next) { 1005 /* 1006 * (flags & LLE_STATIC) means deleting all entries 1007 * including static ARP entries. 1008 */ 1009 if (IN_ARE_MASKED_ADDR_EQUAL(satosin(L3_ADDR(lle)), 1010 pfx, msk) && ((flags & LLE_STATIC) || 1011 !(lle->la_flags & LLE_STATIC))) { 1012 LLE_WLOCK(lle); 1013 if (callout_stop(&lle->la_timer)) 1014 LLE_REMREF(lle); 1015 pkts_dropped = llentry_free(lle); 1016 ARPSTAT_ADD(dropped, pkts_dropped); 1017 } 1018 } 1019 } 1020 IF_AFDATA_WUNLOCK(llt->llt_ifp); 1021 } 1022 1023 1024 static int 1025 in_lltable_rtcheck(struct ifnet *ifp, u_int flags, const struct sockaddr *l3addr) 1026 { 1027 struct rtentry *rt; 1028 1029 KASSERT(l3addr->sa_family == AF_INET, 1030 ("sin_family %d", l3addr->sa_family)); 1031 1032 /* XXX rtalloc1 should take a const param */ 1033 rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); 1034 1035 if (rt == NULL) 1036 return (EINVAL); 1037 1038 /* 1039 * If the gateway for an existing host route matches the target L3 1040 * address, which is a special route inserted by some implementation 1041 * such as MANET, and the interface is of the correct type, then 1042 * allow for ARP to proceed. 1043 */ 1044 if (rt->rt_flags & RTF_GATEWAY) { 1045 if (!(rt->rt_flags & RTF_HOST) || !rt->rt_ifp || 1046 rt->rt_ifp->if_type != IFT_ETHER || 1047 (rt->rt_ifp->if_flags & (IFF_NOARP | IFF_STATICARP)) != 0 || 1048 memcmp(rt->rt_gateway->sa_data, l3addr->sa_data, 1049 sizeof(in_addr_t)) != 0) { 1050 RTFREE_LOCKED(rt); 1051 return (EINVAL); 1052 } 1053 } 1054 1055 /* 1056 * Make sure that at least the destination address is covered 1057 * by the route. This is for handling the case where 2 or more 1058 * interfaces have the same prefix. An incoming packet arrives 1059 * on one interface and the corresponding outgoing packet leaves 1060 * another interface. 1061 */ 1062 if (!(rt->rt_flags & RTF_HOST) && rt->rt_ifp != ifp) { 1063 const char *sa, *mask, *addr, *lim; 1064 int len; 1065 1066 mask = (const char *)rt_mask(rt); 1067 /* 1068 * Just being extra cautious to avoid some custom 1069 * code getting into trouble. 1070 */ 1071 if (mask == NULL) { 1072 RTFREE_LOCKED(rt); 1073 return (EINVAL); 1074 } 1075 1076 sa = (const char *)rt_key(rt); 1077 addr = (const char *)l3addr; 1078 len = ((const struct sockaddr_in *)l3addr)->sin_len; 1079 lim = addr + len; 1080 1081 for ( ; addr < lim; sa++, mask++, addr++) { 1082 if ((*sa ^ *addr) & *mask) { 1083 #ifdef DIAGNOSTIC 1084 log(LOG_INFO, "IPv4 address: \"%s\" is not on the network\n", 1085 inet_ntoa(((const struct sockaddr_in *)l3addr)->sin_addr)); 1086 #endif 1087 RTFREE_LOCKED(rt); 1088 return (EINVAL); 1089 } 1090 } 1091 } 1092 1093 RTFREE_LOCKED(rt); 1094 return (0); 1095 } 1096 1097 /* 1098 * Return NULL if not found or marked for deletion. 1099 * If found return lle read locked. 1100 */ 1101 static struct llentry * 1102 in_lltable_lookup(struct lltable *llt, u_int flags, const struct sockaddr *l3addr) 1103 { 1104 const struct sockaddr_in *sin = (const struct sockaddr_in *)l3addr; 1105 struct ifnet *ifp = llt->llt_ifp; 1106 struct llentry *lle; 1107 struct llentries *lleh; 1108 u_int hashkey; 1109 1110 IF_AFDATA_LOCK_ASSERT(ifp); 1111 KASSERT(l3addr->sa_family == AF_INET, 1112 ("sin_family %d", l3addr->sa_family)); 1113 1114 hashkey = sin->sin_addr.s_addr; 1115 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 1116 LIST_FOREACH(lle, lleh, lle_next) { 1117 struct sockaddr_in *sa2 = satosin(L3_ADDR(lle)); 1118 if (lle->la_flags & LLE_DELETED) 1119 continue; 1120 if (sa2->sin_addr.s_addr == sin->sin_addr.s_addr) 1121 break; 1122 } 1123 if (lle == NULL) { 1124 #ifdef DIAGNOSTIC 1125 if (flags & LLE_DELETE) 1126 log(LOG_INFO, "interface address is missing from cache = %p in delete\n", lle); 1127 #endif 1128 if (!(flags & LLE_CREATE)) 1129 return (NULL); 1130 /* 1131 * A route that covers the given address must have 1132 * been installed 1st because we are doing a resolution, 1133 * verify this. 1134 */ 1135 if (!(flags & LLE_IFADDR) && 1136 in_lltable_rtcheck(ifp, flags, l3addr) != 0) 1137 goto done; 1138 1139 lle = in_lltable_new(l3addr, flags); 1140 if (lle == NULL) { 1141 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 1142 goto done; 1143 } 1144 lle->la_flags = flags & ~LLE_CREATE; 1145 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 1146 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 1147 lle->la_flags |= (LLE_VALID | LLE_STATIC); 1148 } 1149 1150 lle->lle_tbl = llt; 1151 lle->lle_head = lleh; 1152 lle->la_flags |= LLE_LINKED; 1153 LIST_INSERT_HEAD(lleh, lle, lle_next); 1154 } else if (flags & LLE_DELETE) { 1155 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 1156 LLE_WLOCK(lle); 1157 lle->la_flags |= LLE_DELETED; 1158 EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_DELETED); 1159 #ifdef DIAGNOSTIC 1160 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 1161 #endif 1162 if ((lle->la_flags & 1163 (LLE_STATIC | LLE_IFADDR)) == LLE_STATIC) 1164 llentry_free(lle); 1165 else 1166 LLE_WUNLOCK(lle); 1167 } 1168 lle = (void *)-1; 1169 1170 } 1171 if (LLE_IS_VALID(lle)) { 1172 if (flags & LLE_EXCLUSIVE) 1173 LLE_WLOCK(lle); 1174 else 1175 LLE_RLOCK(lle); 1176 } 1177 done: 1178 return (lle); 1179 } 1180 1181 static int 1182 in_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 1183 { 1184 #define SIN(lle) ((struct sockaddr_in *) L3_ADDR(lle)) 1185 struct ifnet *ifp = llt->llt_ifp; 1186 struct llentry *lle; 1187 /* XXX stack use */ 1188 struct { 1189 struct rt_msghdr rtm; 1190 struct sockaddr_in sin; 1191 struct sockaddr_dl sdl; 1192 } arpc; 1193 int error, i; 1194 1195 LLTABLE_LOCK_ASSERT(); 1196 1197 error = 0; 1198 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 1199 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 1200 struct sockaddr_dl *sdl; 1201 1202 /* skip deleted entries */ 1203 if ((lle->la_flags & LLE_DELETED) == LLE_DELETED) 1204 continue; 1205 /* Skip if jailed and not a valid IP of the prison. */ 1206 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 1207 continue; 1208 /* 1209 * produce a msg made of: 1210 * struct rt_msghdr; 1211 * struct sockaddr_in; (IPv4) 1212 * struct sockaddr_dl; 1213 */ 1214 bzero(&arpc, sizeof(arpc)); 1215 arpc.rtm.rtm_msglen = sizeof(arpc); 1216 arpc.rtm.rtm_version = RTM_VERSION; 1217 arpc.rtm.rtm_type = RTM_GET; 1218 arpc.rtm.rtm_flags = RTF_UP; 1219 arpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 1220 arpc.sin.sin_family = AF_INET; 1221 arpc.sin.sin_len = sizeof(arpc.sin); 1222 arpc.sin.sin_addr.s_addr = SIN(lle)->sin_addr.s_addr; 1223 1224 /* publish */ 1225 if (lle->la_flags & LLE_PUB) 1226 arpc.rtm.rtm_flags |= RTF_ANNOUNCE; 1227 1228 sdl = &arpc.sdl; 1229 sdl->sdl_family = AF_LINK; 1230 sdl->sdl_len = sizeof(*sdl); 1231 sdl->sdl_index = ifp->if_index; 1232 sdl->sdl_type = ifp->if_type; 1233 if ((lle->la_flags & LLE_VALID) == LLE_VALID) { 1234 sdl->sdl_alen = ifp->if_addrlen; 1235 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 1236 } else { 1237 sdl->sdl_alen = 0; 1238 bzero(LLADDR(sdl), ifp->if_addrlen); 1239 } 1240 1241 arpc.rtm.rtm_rmx.rmx_expire = 1242 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 1243 arpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 1244 if (lle->la_flags & LLE_STATIC) 1245 arpc.rtm.rtm_flags |= RTF_STATIC; 1246 arpc.rtm.rtm_index = ifp->if_index; 1247 error = SYSCTL_OUT(wr, &arpc, sizeof(arpc)); 1248 if (error) 1249 break; 1250 } 1251 } 1252 return error; 1253 #undef SIN 1254 } 1255 1256 void * 1257 in_domifattach(struct ifnet *ifp) 1258 { 1259 struct in_ifinfo *ii; 1260 struct lltable *llt; 1261 1262 ii = malloc(sizeof(struct in_ifinfo), M_IFADDR, M_WAITOK|M_ZERO); 1263 1264 llt = lltable_init(ifp, AF_INET); 1265 if (llt != NULL) { 1266 llt->llt_prefix_free = in_lltable_prefix_free; 1267 llt->llt_lookup = in_lltable_lookup; 1268 llt->llt_dump = in_lltable_dump; 1269 } 1270 ii->ii_llt = llt; 1271 1272 ii->ii_igmp = igmp_domifattach(ifp); 1273 1274 return ii; 1275 } 1276 1277 void 1278 in_domifdetach(struct ifnet *ifp, void *aux) 1279 { 1280 struct in_ifinfo *ii = (struct in_ifinfo *)aux; 1281 1282 igmp_domifdetach(ifp); 1283 lltable_free(ii->ii_llt); 1284 free(ii, M_IFADDR); 1285 } 1286