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