in.c revision 191476
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: head/sys/netinet/in.c 191476 2009-04-24 22:11:53Z rwatson $"); 35 36#include "opt_carp.h" 37 38#include <sys/param.h> 39#include <sys/systm.h> 40#include <sys/sockio.h> 41#include <sys/malloc.h> 42#include <sys/priv.h> 43#include <sys/socket.h> 44#include <sys/jail.h> 45#include <sys/kernel.h> 46#include <sys/proc.h> 47#include <sys/sysctl.h> 48#include <sys/vimage.h> 49 50#include <net/if.h> 51#include <net/if_llatbl.h> 52#include <net/if_types.h> 53#include <net/route.h> 54 55#include <netinet/in.h> 56#include <netinet/in_var.h> 57#include <netinet/in_pcb.h> 58#include <netinet/ip_var.h> 59#include <netinet/vinet.h> 60#include <netinet/igmp_var.h> 61 62static int in_mask2len(struct in_addr *); 63static void in_len2mask(struct in_addr *, int); 64static int in_lifaddr_ioctl(struct socket *, u_long, caddr_t, 65 struct ifnet *, struct thread *); 66 67static int in_addprefix(struct in_ifaddr *, int); 68static int in_scrubprefix(struct in_ifaddr *); 69static void in_socktrim(struct sockaddr_in *); 70static int in_ifinit(struct ifnet *, 71 struct in_ifaddr *, struct sockaddr_in *, int); 72static void in_purgemaddrs(struct ifnet *); 73 74#ifdef VIMAGE_GLOBALS 75static int subnetsarelocal; 76static int sameprefixcarponly; 77extern struct inpcbinfo ripcbinfo; 78#endif 79 80SYSCTL_V_INT(V_NET, vnet_inet, _net_inet_ip, OID_AUTO, subnets_are_local, 81 CTLFLAG_RW, subnetsarelocal, 0, 82 "Treat all subnets as directly connected"); 83SYSCTL_V_INT(V_NET, vnet_inet, _net_inet_ip, OID_AUTO, same_prefix_carp_only, 84 CTLFLAG_RW, sameprefixcarponly, 0, 85 "Refuse to create same prefixes on different interfaces"); 86 87/* 88 * Return 1 if an internet address is for a ``local'' host 89 * (one to which we have a connection). If subnetsarelocal 90 * is true, this includes other subnets of the local net. 91 * Otherwise, it includes only the directly-connected (sub)nets. 92 */ 93int 94in_localaddr(struct in_addr in) 95{ 96 INIT_VNET_INET(curvnet); 97 register u_long i = ntohl(in.s_addr); 98 register struct in_ifaddr *ia; 99 100 if (V_subnetsarelocal) { 101 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) 102 if ((i & ia->ia_netmask) == ia->ia_net) 103 return (1); 104 } else { 105 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) 106 if ((i & ia->ia_subnetmask) == ia->ia_subnet) 107 return (1); 108 } 109 return (0); 110} 111 112/* 113 * Return 1 if an internet address is for the local host and configured 114 * on one of its interfaces. 115 */ 116int 117in_localip(struct in_addr in) 118{ 119 INIT_VNET_INET(curvnet); 120 struct in_ifaddr *ia; 121 122 LIST_FOREACH(ia, INADDR_HASH(in.s_addr), ia_hash) { 123 if (IA_SIN(ia)->sin_addr.s_addr == in.s_addr) 124 return (1); 125 } 126 return (0); 127} 128 129/* 130 * Determine whether an IP address is in a reserved set of addresses 131 * that may not be forwarded, or whether datagrams to that destination 132 * may be forwarded. 133 */ 134int 135in_canforward(struct in_addr in) 136{ 137 register u_long i = ntohl(in.s_addr); 138 register u_long net; 139 140 if (IN_EXPERIMENTAL(i) || IN_MULTICAST(i) || IN_LINKLOCAL(i)) 141 return (0); 142 if (IN_CLASSA(i)) { 143 net = i & IN_CLASSA_NET; 144 if (net == 0 || net == (IN_LOOPBACKNET << IN_CLASSA_NSHIFT)) 145 return (0); 146 } 147 return (1); 148} 149 150/* 151 * Trim a mask in a sockaddr 152 */ 153static void 154in_socktrim(struct sockaddr_in *ap) 155{ 156 register char *cplim = (char *) &ap->sin_addr; 157 register char *cp = (char *) (&ap->sin_addr + 1); 158 159 ap->sin_len = 0; 160 while (--cp >= cplim) 161 if (*cp) { 162 (ap)->sin_len = cp - (char *) (ap) + 1; 163 break; 164 } 165} 166 167static int 168in_mask2len(mask) 169 struct in_addr *mask; 170{ 171 int x, y; 172 u_char *p; 173 174 p = (u_char *)mask; 175 for (x = 0; x < sizeof(*mask); x++) { 176 if (p[x] != 0xff) 177 break; 178 } 179 y = 0; 180 if (x < sizeof(*mask)) { 181 for (y = 0; y < 8; y++) { 182 if ((p[x] & (0x80 >> y)) == 0) 183 break; 184 } 185 } 186 return (x * 8 + y); 187} 188 189static void 190in_len2mask(struct in_addr *mask, int len) 191{ 192 int i; 193 u_char *p; 194 195 p = (u_char *)mask; 196 bzero(mask, sizeof(*mask)); 197 for (i = 0; i < len / 8; i++) 198 p[i] = 0xff; 199 if (len % 8) 200 p[i] = (0xff00 >> (len % 8)) & 0xff; 201} 202 203/* 204 * Generic internet control operations (ioctl's). 205 * 206 * ifp is NULL if not an interface-specific ioctl. 207 */ 208/* ARGSUSED */ 209int 210in_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp, 211 struct thread *td) 212{ 213 INIT_VNET_INET(curvnet); /* both so and ifp can be NULL here! */ 214 register struct ifreq *ifr = (struct ifreq *)data; 215 register struct in_ifaddr *ia, *iap; 216 register struct ifaddr *ifa; 217 struct in_addr allhosts_addr; 218 struct in_addr dst; 219 struct in_ifaddr *oia; 220 struct in_ifinfo *ii; 221 struct in_aliasreq *ifra = (struct in_aliasreq *)data; 222 struct sockaddr_in oldaddr; 223 int error, hostIsNew, iaIsNew, maskIsNew, s; 224 int iaIsFirst; 225 226 ia = NULL; 227 iaIsFirst = 0; 228 iaIsNew = 0; 229 allhosts_addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP); 230 231 /* 232 * Filter out ioctls we implement directly; forward the rest on to 233 * in_lifaddr_ioctl() and ifp->if_ioctl(). 234 */ 235 switch (cmd) { 236 case SIOCAIFADDR: 237 case SIOCDIFADDR: 238 case SIOCGIFADDR: 239 case SIOCGIFBRDADDR: 240 case SIOCGIFDSTADDR: 241 case SIOCGIFNETMASK: 242 case SIOCSIFADDR: 243 case SIOCSIFBRDADDR: 244 case SIOCSIFDSTADDR: 245 case SIOCSIFNETMASK: 246 break; 247 248 case SIOCALIFADDR: 249 if (td != NULL) { 250 error = priv_check(td, PRIV_NET_ADDIFADDR); 251 if (error) 252 return (error); 253 } 254 if (ifp == NULL) 255 return (EINVAL); 256 return in_lifaddr_ioctl(so, cmd, data, ifp, td); 257 258 case SIOCDLIFADDR: 259 if (td != NULL) { 260 error = priv_check(td, PRIV_NET_DELIFADDR); 261 if (error) 262 return (error); 263 } 264 if (ifp == NULL) 265 return (EINVAL); 266 return in_lifaddr_ioctl(so, cmd, data, ifp, td); 267 268 case SIOCGLIFADDR: 269 if (ifp == NULL) 270 return (EINVAL); 271 return in_lifaddr_ioctl(so, cmd, data, ifp, td); 272 273 default: 274 if (ifp == NULL || ifp->if_ioctl == NULL) 275 return (EOPNOTSUPP); 276 return ((*ifp->if_ioctl)(ifp, cmd, data)); 277 } 278 279 if (ifp == NULL) 280 return (EADDRNOTAVAIL); 281 282 /* 283 * Security checks before we get involved in any work. 284 */ 285 switch (cmd) { 286 case SIOCAIFADDR: 287 case SIOCSIFADDR: 288 case SIOCSIFBRDADDR: 289 case SIOCSIFNETMASK: 290 case SIOCSIFDSTADDR: 291 if (td != NULL) { 292 error = priv_check(td, PRIV_NET_ADDIFADDR); 293 if (error) 294 return (error); 295 } 296 break; 297 298 case SIOCDIFADDR: 299 if (td != NULL) { 300 error = priv_check(td, PRIV_NET_DELIFADDR); 301 if (error) 302 return (error); 303 } 304 break; 305 } 306 307 /* 308 * Find address for this interface, if it exists. 309 * 310 * If an alias address was specified, find that one instead of the 311 * first one on the interface, if possible. 312 */ 313 dst = ((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr; 314 LIST_FOREACH(iap, INADDR_HASH(dst.s_addr), ia_hash) { 315 if (iap->ia_ifp == ifp && 316 iap->ia_addr.sin_addr.s_addr == dst.s_addr) { 317 if (td == NULL || prison_check_ip4(td->td_ucred, 318 &dst) == 0) 319 ia = iap; 320 break; 321 } 322 } 323 if (ia == NULL) { 324 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 325 iap = ifatoia(ifa); 326 if (iap->ia_addr.sin_family == AF_INET) { 327 if (td != NULL && 328 prison_check_ip4(td->td_ucred, 329 &iap->ia_addr.sin_addr) != 0) 330 continue; 331 ia = iap; 332 break; 333 } 334 } 335 } 336 if (ia == NULL) 337 iaIsFirst = 1; 338 339 switch (cmd) { 340 case SIOCAIFADDR: 341 case SIOCDIFADDR: 342 if (ifra->ifra_addr.sin_family == AF_INET) { 343 for (oia = ia; ia; ia = TAILQ_NEXT(ia, ia_link)) { 344 if (ia->ia_ifp == ifp && 345 ia->ia_addr.sin_addr.s_addr == 346 ifra->ifra_addr.sin_addr.s_addr) 347 break; 348 } 349 if ((ifp->if_flags & IFF_POINTOPOINT) 350 && (cmd == SIOCAIFADDR) 351 && (ifra->ifra_dstaddr.sin_addr.s_addr 352 == INADDR_ANY)) { 353 return (EDESTADDRREQ); 354 } 355 } 356 if (cmd == SIOCDIFADDR && ia == NULL) 357 return (EADDRNOTAVAIL); 358 /* FALLTHROUGH */ 359 case SIOCSIFADDR: 360 case SIOCSIFNETMASK: 361 case SIOCSIFDSTADDR: 362 if (ia == NULL) { 363 ia = (struct in_ifaddr *) 364 malloc(sizeof *ia, M_IFADDR, M_WAITOK | M_ZERO); 365 if (ia == NULL) 366 return (ENOBUFS); 367 /* 368 * Protect from ipintr() traversing address list 369 * while we're modifying it. 370 */ 371 ifa = &ia->ia_ifa; 372 IFA_LOCK_INIT(ifa); 373 ifa->ifa_addr = (struct sockaddr *)&ia->ia_addr; 374 ifa->ifa_dstaddr = (struct sockaddr *)&ia->ia_dstaddr; 375 ifa->ifa_netmask = (struct sockaddr *)&ia->ia_sockmask; 376 ifa->ifa_refcnt = 1; 377 378 ia->ia_sockmask.sin_len = 8; 379 ia->ia_sockmask.sin_family = AF_INET; 380 if (ifp->if_flags & IFF_BROADCAST) { 381 ia->ia_broadaddr.sin_len = sizeof(ia->ia_addr); 382 ia->ia_broadaddr.sin_family = AF_INET; 383 } 384 ia->ia_ifp = ifp; 385 386 IF_ADDR_LOCK(ifp); 387 TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link); 388 IF_ADDR_UNLOCK(ifp); 389 s = splnet(); 390 TAILQ_INSERT_TAIL(&V_in_ifaddrhead, ia, ia_link); 391 splx(s); 392 iaIsNew = 1; 393 } 394 break; 395 396 case SIOCSIFBRDADDR: 397 case SIOCGIFADDR: 398 case SIOCGIFNETMASK: 399 case SIOCGIFDSTADDR: 400 case SIOCGIFBRDADDR: 401 if (ia == NULL) 402 return (EADDRNOTAVAIL); 403 break; 404 } 405 switch (cmd) { 406 407 case SIOCGIFADDR: 408 *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_addr; 409 return (0); 410 411 case SIOCGIFBRDADDR: 412 if ((ifp->if_flags & IFF_BROADCAST) == 0) 413 return (EINVAL); 414 *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_broadaddr; 415 return (0); 416 417 case SIOCGIFDSTADDR: 418 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 419 return (EINVAL); 420 *((struct sockaddr_in *)&ifr->ifr_dstaddr) = ia->ia_dstaddr; 421 return (0); 422 423 case SIOCGIFNETMASK: 424 *((struct sockaddr_in *)&ifr->ifr_addr) = ia->ia_sockmask; 425 return (0); 426 427 case SIOCSIFDSTADDR: 428 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 429 return (EINVAL); 430 oldaddr = ia->ia_dstaddr; 431 ia->ia_dstaddr = *(struct sockaddr_in *)&ifr->ifr_dstaddr; 432 if (ifp->if_ioctl != NULL) { 433 error = (*ifp->if_ioctl)(ifp, SIOCSIFDSTADDR, 434 (caddr_t)ia); 435 if (error) { 436 ia->ia_dstaddr = oldaddr; 437 return (error); 438 } 439 } 440 if (ia->ia_flags & IFA_ROUTE) { 441 ia->ia_ifa.ifa_dstaddr = (struct sockaddr *)&oldaddr; 442 rtinit(&(ia->ia_ifa), (int)RTM_DELETE, RTF_HOST); 443 ia->ia_ifa.ifa_dstaddr = 444 (struct sockaddr *)&ia->ia_dstaddr; 445 rtinit(&(ia->ia_ifa), (int)RTM_ADD, RTF_HOST|RTF_UP); 446 } 447 return (0); 448 449 case SIOCSIFBRDADDR: 450 if ((ifp->if_flags & IFF_BROADCAST) == 0) 451 return (EINVAL); 452 ia->ia_broadaddr = *(struct sockaddr_in *)&ifr->ifr_broadaddr; 453 return (0); 454 455 case SIOCSIFADDR: 456 error = in_ifinit(ifp, ia, 457 (struct sockaddr_in *) &ifr->ifr_addr, 1); 458 if (error != 0 && iaIsNew) 459 break; 460 if (error == 0) { 461 ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 462 if (iaIsFirst && 463 (ifp->if_flags & IFF_MULTICAST) != 0) { 464 error = in_joingroup(ifp, &allhosts_addr, 465 NULL, &ii->ii_allhosts); 466 } 467 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 468 } 469 return (0); 470 471 case SIOCSIFNETMASK: 472 ia->ia_sockmask.sin_addr = ifra->ifra_addr.sin_addr; 473 ia->ia_subnetmask = ntohl(ia->ia_sockmask.sin_addr.s_addr); 474 return (0); 475 476 case SIOCAIFADDR: 477 maskIsNew = 0; 478 hostIsNew = 1; 479 error = 0; 480 if (ia->ia_addr.sin_family == AF_INET) { 481 if (ifra->ifra_addr.sin_len == 0) { 482 ifra->ifra_addr = ia->ia_addr; 483 hostIsNew = 0; 484 } else if (ifra->ifra_addr.sin_addr.s_addr == 485 ia->ia_addr.sin_addr.s_addr) 486 hostIsNew = 0; 487 } 488 if (ifra->ifra_mask.sin_len) { 489 in_ifscrub(ifp, ia); 490 ia->ia_sockmask = ifra->ifra_mask; 491 ia->ia_sockmask.sin_family = AF_INET; 492 ia->ia_subnetmask = 493 ntohl(ia->ia_sockmask.sin_addr.s_addr); 494 maskIsNew = 1; 495 } 496 if ((ifp->if_flags & IFF_POINTOPOINT) && 497 (ifra->ifra_dstaddr.sin_family == AF_INET)) { 498 in_ifscrub(ifp, ia); 499 ia->ia_dstaddr = ifra->ifra_dstaddr; 500 maskIsNew = 1; /* We lie; but the effect's the same */ 501 } 502 if (ifra->ifra_addr.sin_family == AF_INET && 503 (hostIsNew || maskIsNew)) 504 error = in_ifinit(ifp, ia, &ifra->ifra_addr, 0); 505 if (error != 0 && iaIsNew) 506 break; 507 508 if ((ifp->if_flags & IFF_BROADCAST) && 509 (ifra->ifra_broadaddr.sin_family == AF_INET)) 510 ia->ia_broadaddr = ifra->ifra_broadaddr; 511 if (error == 0) { 512 ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 513 if (iaIsFirst && 514 (ifp->if_flags & IFF_MULTICAST) != 0) { 515 error = in_joingroup(ifp, &allhosts_addr, 516 NULL, &ii->ii_allhosts); 517 } 518 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 519 } 520 return (error); 521 522 case SIOCDIFADDR: 523 /* 524 * in_ifscrub kills the interface route. 525 */ 526 in_ifscrub(ifp, ia); 527 /* 528 * in_ifadown gets rid of all the rest of 529 * the routes. This is not quite the right 530 * thing to do, but at least if we are running 531 * a routing process they will come back. 532 */ 533 in_ifadown(&ia->ia_ifa, 1); 534 EVENTHANDLER_INVOKE(ifaddr_event, ifp); 535 error = 0; 536 break; 537 538 default: 539 panic("in_control: unsupported ioctl"); 540 } 541 542 /* 543 * Protect from ipintr() traversing address list while we're modifying 544 * it. 545 */ 546 IF_ADDR_LOCK(ifp); 547 TAILQ_REMOVE(&ifp->if_addrhead, &ia->ia_ifa, ifa_link); 548 IF_ADDR_UNLOCK(ifp); 549 s = splnet(); 550 TAILQ_REMOVE(&V_in_ifaddrhead, ia, ia_link); 551 if (ia->ia_addr.sin_family == AF_INET) { 552 LIST_REMOVE(ia, ia_hash); 553 /* 554 * If this is the last IPv4 address configured on this 555 * interface, leave the all-hosts group. 556 * No state-change report need be transmitted. 557 */ 558 oia = NULL; 559 IFP_TO_IA(ifp, oia); 560 if (oia == NULL) { 561 ii = ((struct in_ifinfo *)ifp->if_afdata[AF_INET]); 562 IN_MULTI_LOCK(); 563 if (ii->ii_allhosts) { 564 (void)in_leavegroup_locked(ii->ii_allhosts, 565 NULL); 566 ii->ii_allhosts = NULL; 567 } 568 IN_MULTI_UNLOCK(); 569 } 570 } 571 IFAFREE(&ia->ia_ifa); 572 splx(s); 573 574 return (error); 575} 576 577/* 578 * SIOC[GAD]LIFADDR. 579 * SIOCGLIFADDR: get first address. (?!?) 580 * SIOCGLIFADDR with IFLR_PREFIX: 581 * get first address that matches the specified prefix. 582 * SIOCALIFADDR: add the specified address. 583 * SIOCALIFADDR with IFLR_PREFIX: 584 * EINVAL since we can't deduce hostid part of the address. 585 * SIOCDLIFADDR: delete the specified address. 586 * SIOCDLIFADDR with IFLR_PREFIX: 587 * delete the first address that matches the specified prefix. 588 * return values: 589 * EINVAL on invalid parameters 590 * EADDRNOTAVAIL on prefix match failed/specified address not found 591 * other values may be returned from in_ioctl() 592 */ 593static int 594in_lifaddr_ioctl(struct socket *so, u_long cmd, caddr_t data, 595 struct ifnet *ifp, struct thread *td) 596{ 597 struct if_laddrreq *iflr = (struct if_laddrreq *)data; 598 struct ifaddr *ifa; 599 600 /* sanity checks */ 601 if (data == NULL || ifp == NULL) { 602 panic("invalid argument to in_lifaddr_ioctl"); 603 /*NOTRECHED*/ 604 } 605 606 switch (cmd) { 607 case SIOCGLIFADDR: 608 /* address must be specified on GET with IFLR_PREFIX */ 609 if ((iflr->flags & IFLR_PREFIX) == 0) 610 break; 611 /*FALLTHROUGH*/ 612 case SIOCALIFADDR: 613 case SIOCDLIFADDR: 614 /* address must be specified on ADD and DELETE */ 615 if (iflr->addr.ss_family != AF_INET) 616 return (EINVAL); 617 if (iflr->addr.ss_len != sizeof(struct sockaddr_in)) 618 return (EINVAL); 619 /* XXX need improvement */ 620 if (iflr->dstaddr.ss_family 621 && iflr->dstaddr.ss_family != AF_INET) 622 return (EINVAL); 623 if (iflr->dstaddr.ss_family 624 && iflr->dstaddr.ss_len != sizeof(struct sockaddr_in)) 625 return (EINVAL); 626 break; 627 default: /*shouldn't happen*/ 628 return (EOPNOTSUPP); 629 } 630 if (sizeof(struct in_addr) * 8 < iflr->prefixlen) 631 return (EINVAL); 632 633 switch (cmd) { 634 case SIOCALIFADDR: 635 { 636 struct in_aliasreq ifra; 637 638 if (iflr->flags & IFLR_PREFIX) 639 return (EINVAL); 640 641 /* copy args to in_aliasreq, perform ioctl(SIOCAIFADDR_IN6). */ 642 bzero(&ifra, sizeof(ifra)); 643 bcopy(iflr->iflr_name, ifra.ifra_name, 644 sizeof(ifra.ifra_name)); 645 646 bcopy(&iflr->addr, &ifra.ifra_addr, iflr->addr.ss_len); 647 648 if (iflr->dstaddr.ss_family) { /*XXX*/ 649 bcopy(&iflr->dstaddr, &ifra.ifra_dstaddr, 650 iflr->dstaddr.ss_len); 651 } 652 653 ifra.ifra_mask.sin_family = AF_INET; 654 ifra.ifra_mask.sin_len = sizeof(struct sockaddr_in); 655 in_len2mask(&ifra.ifra_mask.sin_addr, iflr->prefixlen); 656 657 return (in_control(so, SIOCAIFADDR, (caddr_t)&ifra, ifp, td)); 658 } 659 case SIOCGLIFADDR: 660 case SIOCDLIFADDR: 661 { 662 struct in_ifaddr *ia; 663 struct in_addr mask, candidate, match; 664 struct sockaddr_in *sin; 665 666 bzero(&mask, sizeof(mask)); 667 bzero(&match, sizeof(match)); 668 if (iflr->flags & IFLR_PREFIX) { 669 /* lookup a prefix rather than address. */ 670 in_len2mask(&mask, iflr->prefixlen); 671 672 sin = (struct sockaddr_in *)&iflr->addr; 673 match.s_addr = sin->sin_addr.s_addr; 674 match.s_addr &= mask.s_addr; 675 676 /* if you set extra bits, that's wrong */ 677 if (match.s_addr != sin->sin_addr.s_addr) 678 return (EINVAL); 679 680 } else { 681 /* on getting an address, take the 1st match */ 682 /* on deleting an address, do exact match */ 683 if (cmd != SIOCGLIFADDR) { 684 in_len2mask(&mask, 32); 685 sin = (struct sockaddr_in *)&iflr->addr; 686 match.s_addr = sin->sin_addr.s_addr; 687 } 688 } 689 690 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 691 if (ifa->ifa_addr->sa_family != AF_INET6) 692 continue; 693 if (match.s_addr == 0) 694 break; 695 candidate.s_addr = ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr; 696 candidate.s_addr &= mask.s_addr; 697 if (candidate.s_addr == match.s_addr) 698 break; 699 } 700 if (ifa == NULL) 701 return (EADDRNOTAVAIL); 702 ia = (struct in_ifaddr *)ifa; 703 704 if (cmd == SIOCGLIFADDR) { 705 /* fill in the if_laddrreq structure */ 706 bcopy(&ia->ia_addr, &iflr->addr, ia->ia_addr.sin_len); 707 708 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 709 bcopy(&ia->ia_dstaddr, &iflr->dstaddr, 710 ia->ia_dstaddr.sin_len); 711 } else 712 bzero(&iflr->dstaddr, sizeof(iflr->dstaddr)); 713 714 iflr->prefixlen = 715 in_mask2len(&ia->ia_sockmask.sin_addr); 716 717 iflr->flags = 0; /*XXX*/ 718 719 return (0); 720 } else { 721 struct in_aliasreq ifra; 722 723 /* fill in_aliasreq and do ioctl(SIOCDIFADDR_IN6) */ 724 bzero(&ifra, sizeof(ifra)); 725 bcopy(iflr->iflr_name, ifra.ifra_name, 726 sizeof(ifra.ifra_name)); 727 728 bcopy(&ia->ia_addr, &ifra.ifra_addr, 729 ia->ia_addr.sin_len); 730 if ((ifp->if_flags & IFF_POINTOPOINT) != 0) { 731 bcopy(&ia->ia_dstaddr, &ifra.ifra_dstaddr, 732 ia->ia_dstaddr.sin_len); 733 } 734 bcopy(&ia->ia_sockmask, &ifra.ifra_dstaddr, 735 ia->ia_sockmask.sin_len); 736 737 return (in_control(so, SIOCDIFADDR, (caddr_t)&ifra, 738 ifp, td)); 739 } 740 } 741 } 742 743 return (EOPNOTSUPP); /*just for safety*/ 744} 745 746/* 747 * Delete any existing route for an interface. 748 */ 749void 750in_ifscrub(struct ifnet *ifp, struct in_ifaddr *ia) 751{ 752 753 in_scrubprefix(ia); 754} 755 756/* 757 * Initialize an interface's internet address 758 * and routing table entry. 759 */ 760static int 761in_ifinit(struct ifnet *ifp, struct in_ifaddr *ia, struct sockaddr_in *sin, 762 int scrub) 763{ 764 INIT_VNET_INET(ifp->if_vnet); 765 register u_long i = ntohl(sin->sin_addr.s_addr); 766 struct sockaddr_in oldaddr; 767 int s = splimp(), flags = RTF_UP, error = 0; 768 769 oldaddr = ia->ia_addr; 770 if (oldaddr.sin_family == AF_INET) 771 LIST_REMOVE(ia, ia_hash); 772 ia->ia_addr = *sin; 773 if (ia->ia_addr.sin_family == AF_INET) 774 LIST_INSERT_HEAD(INADDR_HASH(ia->ia_addr.sin_addr.s_addr), 775 ia, ia_hash); 776 /* 777 * Give the interface a chance to initialize 778 * if this is its first address, 779 * and to validate the address if necessary. 780 */ 781 if (ifp->if_ioctl != NULL) { 782 error = (*ifp->if_ioctl)(ifp, SIOCSIFADDR, (caddr_t)ia); 783 if (error) { 784 splx(s); 785 /* LIST_REMOVE(ia, ia_hash) is done in in_control */ 786 ia->ia_addr = oldaddr; 787 if (ia->ia_addr.sin_family == AF_INET) 788 LIST_INSERT_HEAD(INADDR_HASH( 789 ia->ia_addr.sin_addr.s_addr), ia, ia_hash); 790 else 791 /* 792 * If oldaddr family is not AF_INET (e.g. 793 * interface has been just created) in_control 794 * does not call LIST_REMOVE, and we end up 795 * with bogus ia entries in hash 796 */ 797 LIST_REMOVE(ia, ia_hash); 798 return (error); 799 } 800 } 801 splx(s); 802 if (scrub) { 803 ia->ia_ifa.ifa_addr = (struct sockaddr *)&oldaddr; 804 in_ifscrub(ifp, ia); 805 ia->ia_ifa.ifa_addr = (struct sockaddr *)&ia->ia_addr; 806 } 807 if (IN_CLASSA(i)) 808 ia->ia_netmask = IN_CLASSA_NET; 809 else if (IN_CLASSB(i)) 810 ia->ia_netmask = IN_CLASSB_NET; 811 else 812 ia->ia_netmask = IN_CLASSC_NET; 813 /* 814 * The subnet mask usually includes at least the standard network part, 815 * but may may be smaller in the case of supernetting. 816 * If it is set, we believe it. 817 */ 818 if (ia->ia_subnetmask == 0) { 819 ia->ia_subnetmask = ia->ia_netmask; 820 ia->ia_sockmask.sin_addr.s_addr = htonl(ia->ia_subnetmask); 821 } else 822 ia->ia_netmask &= ia->ia_subnetmask; 823 ia->ia_net = i & ia->ia_netmask; 824 ia->ia_subnet = i & ia->ia_subnetmask; 825 in_socktrim(&ia->ia_sockmask); 826#ifdef DEV_CARP 827 /* 828 * XXX: carp(4) does not have interface route 829 */ 830 if (ifp->if_type == IFT_CARP) 831 return (0); 832#endif 833 /* 834 * Add route for the network. 835 */ 836 ia->ia_ifa.ifa_metric = ifp->if_metric; 837 if (ifp->if_flags & IFF_BROADCAST) { 838 ia->ia_broadaddr.sin_addr.s_addr = 839 htonl(ia->ia_subnet | ~ia->ia_subnetmask); 840 ia->ia_netbroadcast.s_addr = 841 htonl(ia->ia_net | ~ ia->ia_netmask); 842 } else if (ifp->if_flags & IFF_LOOPBACK) { 843 ia->ia_dstaddr = ia->ia_addr; 844 flags |= RTF_HOST; 845 } else if (ifp->if_flags & IFF_POINTOPOINT) { 846 if (ia->ia_dstaddr.sin_family != AF_INET) 847 return (0); 848 flags |= RTF_HOST; 849 } 850 if ((error = in_addprefix(ia, flags)) != 0) 851 return (error); 852 853 return (error); 854} 855 856#define rtinitflags(x) \ 857 ((((x)->ia_ifp->if_flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) != 0) \ 858 ? RTF_HOST : 0) 859/* 860 * Check if we have a route for the given prefix already or add one accordingly. 861 */ 862static int 863in_addprefix(struct in_ifaddr *target, int flags) 864{ 865 INIT_VNET_INET(curvnet); 866 struct in_ifaddr *ia; 867 struct in_addr prefix, mask, p, m; 868 int error; 869 870 if ((flags & RTF_HOST) != 0) { 871 prefix = target->ia_dstaddr.sin_addr; 872 mask.s_addr = 0; 873 } else { 874 prefix = target->ia_addr.sin_addr; 875 mask = target->ia_sockmask.sin_addr; 876 prefix.s_addr &= mask.s_addr; 877 } 878 879 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 880 if (rtinitflags(ia)) { 881 p = ia->ia_addr.sin_addr; 882 883 if (prefix.s_addr != p.s_addr) 884 continue; 885 } else { 886 p = ia->ia_addr.sin_addr; 887 m = ia->ia_sockmask.sin_addr; 888 p.s_addr &= m.s_addr; 889 890 if (prefix.s_addr != p.s_addr || 891 mask.s_addr != m.s_addr) 892 continue; 893 } 894 895 /* 896 * If we got a matching prefix route inserted by other 897 * interface address, we are done here. 898 */ 899 if (ia->ia_flags & IFA_ROUTE) { 900 if (V_sameprefixcarponly && 901 target->ia_ifp->if_type != IFT_CARP && 902 ia->ia_ifp->if_type != IFT_CARP) 903 return (EEXIST); 904 else 905 return (0); 906 } 907 } 908 909 /* 910 * No-one seem to have this prefix route, so we try to insert it. 911 */ 912 error = rtinit(&target->ia_ifa, (int)RTM_ADD, flags); 913 if (!error) 914 target->ia_flags |= IFA_ROUTE; 915 return (error); 916} 917 918extern void arp_ifscrub(struct ifnet *ifp, uint32_t addr); 919 920/* 921 * If there is no other address in the system that can serve a route to the 922 * same prefix, remove the route. Hand over the route to the new address 923 * otherwise. 924 */ 925static int 926in_scrubprefix(struct in_ifaddr *target) 927{ 928 INIT_VNET_INET(curvnet); 929 struct in_ifaddr *ia; 930 struct in_addr prefix, mask, p; 931 int error; 932 933 if ((target->ia_flags & IFA_ROUTE) == 0) 934 return (0); 935 936 if (rtinitflags(target)) 937 prefix = target->ia_dstaddr.sin_addr; 938 else { 939 prefix = target->ia_addr.sin_addr; 940 mask = target->ia_sockmask.sin_addr; 941 prefix.s_addr &= mask.s_addr; 942 /* remove arp cache */ 943 arp_ifscrub(target->ia_ifp, IA_SIN(target)->sin_addr.s_addr); 944 } 945 946 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) { 947 if (rtinitflags(ia)) 948 p = ia->ia_dstaddr.sin_addr; 949 else { 950 p = ia->ia_addr.sin_addr; 951 p.s_addr &= ia->ia_sockmask.sin_addr.s_addr; 952 } 953 954 if (prefix.s_addr != p.s_addr) 955 continue; 956 957 /* 958 * If we got a matching prefix address, move IFA_ROUTE and 959 * the route itself to it. Make sure that routing daemons 960 * get a heads-up. 961 * 962 * XXX: a special case for carp(4) interface 963 */ 964 if ((ia->ia_flags & IFA_ROUTE) == 0 965#ifdef DEV_CARP 966 && (ia->ia_ifp->if_type != IFT_CARP) 967#endif 968 ) { 969 rtinit(&(target->ia_ifa), (int)RTM_DELETE, 970 rtinitflags(target)); 971 target->ia_flags &= ~IFA_ROUTE; 972 973 error = rtinit(&ia->ia_ifa, (int)RTM_ADD, 974 rtinitflags(ia) | RTF_UP); 975 if (error == 0) 976 ia->ia_flags |= IFA_ROUTE; 977 return (error); 978 } 979 } 980 981 /* 982 * As no-one seem to have this prefix, we can remove the route. 983 */ 984 rtinit(&(target->ia_ifa), (int)RTM_DELETE, rtinitflags(target)); 985 target->ia_flags &= ~IFA_ROUTE; 986 return (0); 987} 988 989#undef rtinitflags 990 991/* 992 * Return 1 if the address might be a local broadcast address. 993 */ 994int 995in_broadcast(struct in_addr in, struct ifnet *ifp) 996{ 997 register struct ifaddr *ifa; 998 u_long t; 999 1000 if (in.s_addr == INADDR_BROADCAST || 1001 in.s_addr == INADDR_ANY) 1002 return (1); 1003 if ((ifp->if_flags & IFF_BROADCAST) == 0) 1004 return (0); 1005 t = ntohl(in.s_addr); 1006 /* 1007 * Look through the list of addresses for a match 1008 * with a broadcast address. 1009 */ 1010#define ia ((struct in_ifaddr *)ifa) 1011 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 1012 if (ifa->ifa_addr->sa_family == AF_INET && 1013 (in.s_addr == ia->ia_broadaddr.sin_addr.s_addr || 1014 in.s_addr == ia->ia_netbroadcast.s_addr || 1015 /* 1016 * Check for old-style (host 0) broadcast. 1017 */ 1018 t == ia->ia_subnet || t == ia->ia_net) && 1019 /* 1020 * Check for an all one subnetmask. These 1021 * only exist when an interface gets a secondary 1022 * address. 1023 */ 1024 ia->ia_subnetmask != (u_long)0xffffffff) 1025 return (1); 1026 return (0); 1027#undef ia 1028} 1029 1030/* 1031 * On interface removal, clean up IPv4 data structures hung off of the ifnet. 1032 */ 1033void 1034in_ifdetach(struct ifnet *ifp) 1035{ 1036 INIT_VNET_INET(ifp->if_vnet); 1037 1038 in_pcbpurgeif0(&V_ripcbinfo, ifp); 1039 in_pcbpurgeif0(&V_udbinfo, ifp); 1040 in_purgemaddrs(ifp); 1041} 1042 1043/* 1044 * Delete all IPv4 multicast address records, and associated link-layer 1045 * multicast address records, associated with ifp. 1046 * XXX It looks like domifdetach runs AFTER the link layer cleanup. 1047 * XXX This should not race with ifma_protospec being set during 1048 * a new allocation, if it does, we have bigger problems. 1049 */ 1050static void 1051in_purgemaddrs(struct ifnet *ifp) 1052{ 1053 INIT_VNET_INET(ifp->if_vnet); 1054 LIST_HEAD(,in_multi) purgeinms; 1055 struct in_multi *inm, *tinm; 1056 struct ifmultiaddr *ifma; 1057 1058 LIST_INIT(&purgeinms); 1059 IN_MULTI_LOCK(); 1060 1061 /* 1062 * Extract list of in_multi associated with the detaching ifp 1063 * which the PF_INET layer is about to release. 1064 * We need to do this as IF_ADDR_LOCK() may be re-acquired 1065 * by code further down. 1066 */ 1067 IF_ADDR_LOCK(ifp); 1068 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1069 if (ifma->ifma_addr->sa_family != AF_INET || 1070 ifma->ifma_protospec == NULL) 1071 continue; 1072#if 0 1073 KASSERT(ifma->ifma_protospec != NULL, 1074 ("%s: ifma_protospec is NULL", __func__)); 1075#endif 1076 inm = (struct in_multi *)ifma->ifma_protospec; 1077 LIST_INSERT_HEAD(&purgeinms, inm, inm_link); 1078 } 1079 IF_ADDR_UNLOCK(ifp); 1080 1081 LIST_FOREACH_SAFE(inm, &purgeinms, inm_link, tinm) { 1082 LIST_REMOVE(inm, inm_link); 1083 inm_release_locked(inm); 1084 } 1085 igmp_ifdetach(ifp); 1086 1087 IN_MULTI_UNLOCK(); 1088} 1089 1090#include <sys/syslog.h> 1091#include <net/if_dl.h> 1092#include <netinet/if_ether.h> 1093 1094struct in_llentry { 1095 struct llentry base; 1096 struct sockaddr_in l3_addr4; 1097}; 1098 1099static struct llentry * 1100in_lltable_new(const struct sockaddr *l3addr, u_int flags) 1101{ 1102 struct in_llentry *lle; 1103 1104 lle = malloc(sizeof(struct in_llentry), M_LLTABLE, M_DONTWAIT | M_ZERO); 1105 if (lle == NULL) /* NB: caller generates msg */ 1106 return NULL; 1107 1108 callout_init(&lle->base.la_timer, CALLOUT_MPSAFE); 1109 /* 1110 * For IPv4 this will trigger "arpresolve" to generate 1111 * an ARP request. 1112 */ 1113 lle->base.la_expire = time_second; /* mark expired */ 1114 lle->l3_addr4 = *(const struct sockaddr_in *)l3addr; 1115 lle->base.lle_refcnt = 1; 1116 LLE_LOCK_INIT(&lle->base); 1117 return &lle->base; 1118} 1119 1120/* 1121 * Deletes an address from the address table. 1122 * This function is called by the timer functions 1123 * such as arptimer() and nd6_llinfo_timer(), and 1124 * the caller does the locking. 1125 */ 1126static void 1127in_lltable_free(struct lltable *llt, struct llentry *lle) 1128{ 1129 LLE_WUNLOCK(lle); 1130 LLE_LOCK_DESTROY(lle); 1131 free(lle, M_LLTABLE); 1132} 1133 1134static int 1135in_lltable_rtcheck(struct ifnet *ifp, const struct sockaddr *l3addr) 1136{ 1137 struct rtentry *rt; 1138 1139 KASSERT(l3addr->sa_family == AF_INET, 1140 ("sin_family %d", l3addr->sa_family)); 1141 1142 /* XXX rtalloc1 should take a const param */ 1143 rt = rtalloc1(__DECONST(struct sockaddr *, l3addr), 0, 0); 1144 if (rt == NULL || (rt->rt_flags & RTF_GATEWAY) || rt->rt_ifp != ifp) { 1145 log(LOG_INFO, "IPv4 address: \"%s\" is not on the network\n", 1146 inet_ntoa(((const struct sockaddr_in *)l3addr)->sin_addr)); 1147 if (rt != NULL) 1148 RTFREE_LOCKED(rt); 1149 return (EINVAL); 1150 } 1151 RTFREE_LOCKED(rt); 1152 return 0; 1153} 1154 1155/* 1156 * Return NULL if not found or marked for deletion. 1157 * If found return lle read locked. 1158 */ 1159static struct llentry * 1160in_lltable_lookup(struct lltable *llt, u_int flags, const struct sockaddr *l3addr) 1161{ 1162 const struct sockaddr_in *sin = (const struct sockaddr_in *)l3addr; 1163 struct ifnet *ifp = llt->llt_ifp; 1164 struct llentry *lle; 1165 struct llentries *lleh; 1166 u_int hashkey; 1167 1168 IF_AFDATA_LOCK_ASSERT(ifp); 1169 KASSERT(l3addr->sa_family == AF_INET, 1170 ("sin_family %d", l3addr->sa_family)); 1171 1172 hashkey = sin->sin_addr.s_addr; 1173 lleh = &llt->lle_head[LLATBL_HASH(hashkey, LLTBL_HASHMASK)]; 1174 LIST_FOREACH(lle, lleh, lle_next) { 1175 struct sockaddr_in *sa2 = (struct sockaddr_in *)L3_ADDR(lle); 1176 if (lle->la_flags & LLE_DELETED) 1177 continue; 1178 if (sa2->sin_addr.s_addr == sin->sin_addr.s_addr) 1179 break; 1180 } 1181 if (lle == NULL) { 1182#ifdef DIAGNOSTICS 1183 if (flags & LLE_DELETE) 1184 log(LOG_INFO, "interface address is missing from cache = %p in delete\n", lle); 1185#endif 1186 if (!(flags & LLE_CREATE)) 1187 return (NULL); 1188 /* 1189 * A route that covers the given address must have 1190 * been installed 1st because we are doing a resolution, 1191 * verify this. 1192 */ 1193 if (!(flags & LLE_IFADDR) && 1194 in_lltable_rtcheck(ifp, l3addr) != 0) 1195 goto done; 1196 1197 lle = in_lltable_new(l3addr, flags); 1198 if (lle == NULL) { 1199 log(LOG_INFO, "lla_lookup: new lle malloc failed\n"); 1200 goto done; 1201 } 1202 lle->la_flags = flags & ~LLE_CREATE; 1203 if ((flags & (LLE_CREATE | LLE_IFADDR)) == (LLE_CREATE | LLE_IFADDR)) { 1204 bcopy(IF_LLADDR(ifp), &lle->ll_addr, ifp->if_addrlen); 1205 lle->la_flags |= (LLE_VALID | LLE_STATIC); 1206 } 1207 1208 lle->lle_tbl = llt; 1209 lle->lle_head = lleh; 1210 LIST_INSERT_HEAD(lleh, lle, lle_next); 1211 } else if (flags & LLE_DELETE) { 1212 if (!(lle->la_flags & LLE_IFADDR) || (flags & LLE_IFADDR)) { 1213 LLE_WLOCK(lle); 1214 lle->la_flags = LLE_DELETED; 1215 LLE_WUNLOCK(lle); 1216#ifdef DIAGNOSTICS 1217 log(LOG_INFO, "ifaddr cache = %p is deleted\n", lle); 1218#endif 1219 } 1220 lle = (void *)-1; 1221 1222 } 1223 if (LLE_IS_VALID(lle)) { 1224 if (flags & LLE_EXCLUSIVE) 1225 LLE_WLOCK(lle); 1226 else 1227 LLE_RLOCK(lle); 1228 } 1229done: 1230 return (lle); 1231} 1232 1233static int 1234in_lltable_dump(struct lltable *llt, struct sysctl_req *wr) 1235{ 1236#define SIN(lle) ((struct sockaddr_in *) L3_ADDR(lle)) 1237 struct ifnet *ifp = llt->llt_ifp; 1238 struct llentry *lle; 1239 /* XXX stack use */ 1240 struct { 1241 struct rt_msghdr rtm; 1242 struct sockaddr_inarp sin; 1243 struct sockaddr_dl sdl; 1244 } arpc; 1245 int error, i; 1246 1247 /* XXXXX 1248 * current IFNET_RLOCK() is mapped to IFNET_WLOCK() 1249 * so it is okay to use this ASSERT, change it when 1250 * IFNET lock is finalized 1251 */ 1252 IFNET_WLOCK_ASSERT(); 1253 1254 error = 0; 1255 for (i = 0; i < LLTBL_HASHTBL_SIZE; i++) { 1256 LIST_FOREACH(lle, &llt->lle_head[i], lle_next) { 1257 struct sockaddr_dl *sdl; 1258 1259 /* skip deleted entries */ 1260 if ((lle->la_flags & (LLE_DELETED|LLE_VALID)) != LLE_VALID) 1261 continue; 1262 /* Skip if jailed and not a valid IP of the prison. */ 1263 if (prison_if(wr->td->td_ucred, L3_ADDR(lle)) != 0) 1264 continue; 1265 /* 1266 * produce a msg made of: 1267 * struct rt_msghdr; 1268 * struct sockaddr_inarp; (IPv4) 1269 * struct sockaddr_dl; 1270 */ 1271 bzero(&arpc, sizeof(arpc)); 1272 arpc.rtm.rtm_msglen = sizeof(arpc); 1273 arpc.rtm.rtm_version = RTM_VERSION; 1274 arpc.rtm.rtm_type = RTM_GET; 1275 arpc.rtm.rtm_flags = RTF_UP; 1276 arpc.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY; 1277 arpc.sin.sin_family = AF_INET; 1278 arpc.sin.sin_len = sizeof(arpc.sin); 1279 arpc.sin.sin_addr.s_addr = SIN(lle)->sin_addr.s_addr; 1280 1281 /* publish */ 1282 if (lle->la_flags & LLE_PUB) { 1283 arpc.rtm.rtm_flags |= RTF_ANNOUNCE; 1284 /* proxy only */ 1285 if (lle->la_flags & LLE_PROXY) 1286 arpc.sin.sin_other = SIN_PROXY; 1287 } 1288 1289 sdl = &arpc.sdl; 1290 sdl->sdl_family = AF_LINK; 1291 sdl->sdl_len = sizeof(*sdl); 1292 sdl->sdl_alen = ifp->if_addrlen; 1293 sdl->sdl_index = ifp->if_index; 1294 sdl->sdl_type = ifp->if_type; 1295 bcopy(&lle->ll_addr, LLADDR(sdl), ifp->if_addrlen); 1296 1297 arpc.rtm.rtm_rmx.rmx_expire = 1298 lle->la_flags & LLE_STATIC ? 0 : lle->la_expire; 1299 arpc.rtm.rtm_flags |= (RTF_HOST | RTF_LLDATA); 1300 if (lle->la_flags & LLE_STATIC) 1301 arpc.rtm.rtm_flags |= RTF_STATIC; 1302 arpc.rtm.rtm_index = ifp->if_index; 1303 error = SYSCTL_OUT(wr, &arpc, sizeof(arpc)); 1304 if (error) 1305 break; 1306 } 1307 } 1308 return error; 1309#undef SIN 1310} 1311 1312void * 1313in_domifattach(struct ifnet *ifp) 1314{ 1315 struct in_ifinfo *ii; 1316 struct lltable *llt; 1317 1318 ii = malloc(sizeof(struct in_ifinfo), M_IFADDR, M_WAITOK|M_ZERO); 1319 1320 llt = lltable_init(ifp, AF_INET); 1321 if (llt != NULL) { 1322 llt->llt_new = in_lltable_new; 1323 llt->llt_free = in_lltable_free; 1324 llt->llt_rtcheck = in_lltable_rtcheck; 1325 llt->llt_lookup = in_lltable_lookup; 1326 llt->llt_dump = in_lltable_dump; 1327 } 1328 ii->ii_llt = llt; 1329 1330 ii->ii_igmp = igmp_domifattach(ifp); 1331 1332 return ii; 1333} 1334 1335void 1336in_domifdetach(struct ifnet *ifp, void *aux) 1337{ 1338 struct in_ifinfo *ii = (struct in_ifinfo *)aux; 1339 1340 igmp_domifdetach(ifp); 1341 lltable_free(ii->ii_llt); 1342 free(ii, M_IFADDR); 1343} 1344