1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1986, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)route.c 8.3.1.1 (Berkeley) 2/23/95 32 * $FreeBSD$ 33 */ 34 /************************************************************************ 35 * Note: In this file a 'fib' is a "forwarding information base" * 36 * Which is the new name for an in kernel routing (next hop) table. * 37 ***********************************************************************/ 38 39 #include "opt_inet.h" 40 #include "opt_inet6.h" 41 #include "opt_mrouting.h" 42 #include "opt_route.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/capsicum.h> 47 #include <sys/malloc.h> 48 #include <sys/mbuf.h> 49 #include <sys/socket.h> 50 #include <sys/sysctl.h> 51 #include <sys/syslog.h> 52 #include <sys/sysproto.h> 53 #include <sys/proc.h> 54 #include <sys/domain.h> 55 #include <sys/eventhandler.h> 56 #include <sys/kernel.h> 57 #include <sys/lock.h> 58 #include <sys/rmlock.h> 59 60 #include <net/if.h> 61 #include <net/if_var.h> 62 #include <net/if_dl.h> 63 #include <net/route.h> 64 #include <net/route/route_ctl.h> 65 #include <net/route/route_var.h> 66 #include <net/route/nhop.h> 67 #include <net/vnet.h> 68 69 #include <netinet/in.h> 70 #include <netinet/ip_mroute.h> 71 72 VNET_PCPUSTAT_DEFINE(struct rtstat, rtstat); 73 74 VNET_PCPUSTAT_SYSINIT(rtstat); 75 #ifdef VIMAGE 76 VNET_PCPUSTAT_SYSUNINIT(rtstat); 77 #endif 78 79 EVENTHANDLER_LIST_DEFINE(rt_addrmsg); 80 81 static int rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *, 82 void *arg); 83 static int rt_exportinfo(struct rtentry *rt, struct nhop_object *nh, 84 struct rt_addrinfo *info, int flags); 85 86 /* 87 * route initialization must occur before ip6_init2(), which happenas at 88 * SI_ORDER_MIDDLE. 89 */ 90 static void 91 route_init(void) 92 { 93 94 nhops_init(); 95 } 96 SYSINIT(route_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, route_init, NULL); 97 98 struct rib_head * 99 rt_table_init(int offset, int family, u_int fibnum) 100 { 101 struct rib_head *rh; 102 103 rh = malloc(sizeof(struct rib_head), M_RTABLE, M_WAITOK | M_ZERO); 104 105 /* TODO: These details should be hidded inside radix.c */ 106 /* Init masks tree */ 107 rn_inithead_internal(&rh->head, rh->rnh_nodes, offset); 108 rn_inithead_internal(&rh->rmhead.head, rh->rmhead.mask_nodes, 0); 109 rh->head.rnh_masks = &rh->rmhead; 110 111 /* Save metadata associated with this routing table. */ 112 rh->rib_family = family; 113 rh->rib_fibnum = fibnum; 114 #ifdef VIMAGE 115 rh->rib_vnet = curvnet; 116 #endif 117 118 tmproutes_init(rh); 119 120 /* Init locks */ 121 RIB_LOCK_INIT(rh); 122 123 nhops_init_rib(rh); 124 125 /* Init subscription system */ 126 rib_init_subscriptions(rh); 127 128 /* Finally, set base callbacks */ 129 rh->rnh_addaddr = rn_addroute; 130 rh->rnh_deladdr = rn_delete; 131 rh->rnh_matchaddr = rn_match; 132 rh->rnh_lookup = rn_lookup; 133 rh->rnh_walktree = rn_walktree; 134 rh->rnh_walktree_from = rn_walktree_from; 135 136 return (rh); 137 } 138 139 static int 140 rt_freeentry(struct radix_node *rn, void *arg) 141 { 142 struct radix_head * const rnh = arg; 143 struct radix_node *x; 144 145 x = (struct radix_node *)rn_delete(rn + 2, NULL, rnh); 146 if (x != NULL) 147 R_Free(x); 148 return (0); 149 } 150 151 void 152 rt_table_destroy(struct rib_head *rh) 153 { 154 155 RIB_WLOCK(rh); 156 rh->rib_dying = true; 157 RIB_WUNLOCK(rh); 158 159 #ifdef FIB_ALGO 160 fib_destroy_rib(rh); 161 #endif 162 163 tmproutes_destroy(rh); 164 165 rn_walktree(&rh->rmhead.head, rt_freeentry, &rh->rmhead.head); 166 167 nhops_destroy_rib(rh); 168 169 rib_destroy_subscriptions(rh); 170 171 /* Assume table is already empty */ 172 RIB_LOCK_DESTROY(rh); 173 free(rh, M_RTABLE); 174 } 175 176 /* 177 * Adds a temporal redirect entry to the routing table. 178 * @fibnum: fib number 179 * @dst: destination to install redirect to 180 * @gateway: gateway to go via 181 * @author: sockaddr of originating router, can be NULL 182 * @ifp: interface to use for the redirected route 183 * @flags: set of flags to add. Allowed: RTF_GATEWAY 184 * @lifetime_sec: time in seconds to expire this redirect. 185 * 186 * Retuns 0 on success, errno otherwise. 187 */ 188 int 189 rib_add_redirect(u_int fibnum, struct sockaddr *dst, struct sockaddr *gateway, 190 struct sockaddr *author, struct ifnet *ifp, int flags, int lifetime_sec) 191 { 192 struct rib_cmd_info rc; 193 int error; 194 struct rt_addrinfo info; 195 struct rt_metrics rti_rmx; 196 struct ifaddr *ifa; 197 198 NET_EPOCH_ASSERT(); 199 200 if (rt_tables_get_rnh(fibnum, dst->sa_family) == NULL) 201 return (EAFNOSUPPORT); 202 203 /* Verify the allowed flag mask. */ 204 KASSERT(((flags & ~(RTF_GATEWAY)) == 0), 205 ("invalid redirect flags: %x", flags)); 206 flags |= RTF_HOST | RTF_DYNAMIC; 207 208 /* Get the best ifa for the given interface and gateway. */ 209 if ((ifa = ifaof_ifpforaddr(gateway, ifp)) == NULL) 210 return (ENETUNREACH); 211 212 bzero(&info, sizeof(info)); 213 info.rti_info[RTAX_DST] = dst; 214 info.rti_info[RTAX_GATEWAY] = gateway; 215 info.rti_ifa = ifa; 216 info.rti_ifp = ifp; 217 info.rti_flags = flags; 218 219 /* Setup route metrics to define expire time. */ 220 bzero(&rti_rmx, sizeof(rti_rmx)); 221 /* Set expire time as absolute. */ 222 rti_rmx.rmx_expire = lifetime_sec + time_second; 223 info.rti_mflags |= RTV_EXPIRE; 224 info.rti_rmx = &rti_rmx; 225 226 error = rib_action(fibnum, RTM_ADD, &info, &rc); 227 228 if (error != 0) { 229 /* TODO: add per-fib redirect stats. */ 230 return (error); 231 } 232 233 RTSTAT_INC(rts_dynamic); 234 235 /* Send notification of a route addition to userland. */ 236 bzero(&info, sizeof(info)); 237 info.rti_info[RTAX_DST] = dst; 238 info.rti_info[RTAX_GATEWAY] = gateway; 239 info.rti_info[RTAX_AUTHOR] = author; 240 rt_missmsg_fib(RTM_REDIRECT, &info, flags | RTF_UP, error, fibnum); 241 242 return (0); 243 } 244 245 /* 246 * Routing table ioctl interface. 247 */ 248 int 249 rtioctl_fib(u_long req, caddr_t data, u_int fibnum, struct thread *td) 250 { 251 if (IN_CAPABILITY_MODE(td)) 252 return (ECAPMODE); 253 254 /* 255 * If more ioctl commands are added here, make sure the proper 256 * super-user checks are being performed because it is possible for 257 * prison-root to make it this far if raw sockets have been enabled 258 * in jails. 259 */ 260 #ifdef INET 261 /* Multicast goop, grrr... */ 262 return mrt_ioctl ? mrt_ioctl(req, data, fibnum) : EOPNOTSUPP; 263 #else /* INET */ 264 return ENXIO; 265 #endif /* INET */ 266 } 267 268 struct ifaddr * 269 ifa_ifwithroute(int flags, const struct sockaddr *dst, 270 const struct sockaddr *gateway, u_int fibnum) 271 { 272 struct ifaddr *ifa; 273 274 NET_EPOCH_ASSERT(); 275 if ((flags & RTF_GATEWAY) == 0) { 276 /* 277 * If we are adding a route to an interface, 278 * and the interface is a pt to pt link 279 * we should search for the destination 280 * as our clue to the interface. Otherwise 281 * we can use the local address. 282 */ 283 ifa = NULL; 284 if (flags & RTF_HOST) 285 ifa = ifa_ifwithdstaddr(dst, fibnum); 286 if (ifa == NULL) 287 ifa = ifa_ifwithaddr(gateway); 288 } else { 289 /* 290 * If we are adding a route to a remote net 291 * or host, the gateway may still be on the 292 * other end of a pt to pt link. 293 */ 294 ifa = ifa_ifwithdstaddr(gateway, fibnum); 295 } 296 if (ifa == NULL) 297 ifa = ifa_ifwithnet(gateway, 0, fibnum); 298 if (ifa == NULL) { 299 struct nhop_object *nh; 300 301 nh = rib_lookup(fibnum, gateway, NHR_NONE, 0); 302 303 /* 304 * dismiss a gateway that is reachable only 305 * through the default router 306 */ 307 if ((nh == NULL) || (nh->nh_flags & NHF_DEFAULT)) 308 return (NULL); 309 ifa = nh->nh_ifa; 310 } 311 if (ifa->ifa_addr->sa_family != dst->sa_family) { 312 struct ifaddr *oifa = ifa; 313 ifa = ifaof_ifpforaddr(dst, ifa->ifa_ifp); 314 if (ifa == NULL) 315 ifa = oifa; 316 } 317 318 return (ifa); 319 } 320 321 /* 322 * Copy most of @rt data into @info. 323 * 324 * If @flags contains NHR_COPY, copies dst,netmask and gw to the 325 * pointers specified by @info structure. Assume such pointers 326 * are zeroed sockaddr-like structures with sa_len field initialized 327 * to reflect size of the provided buffer. if no NHR_COPY is specified, 328 * point dst,netmask and gw @info fields to appropriate @rt values. 329 * 330 * if @flags contains NHR_REF, do refcouting on rt_ifp and rt_ifa. 331 * 332 * Returns 0 on success. 333 */ 334 static int 335 rt_exportinfo(struct rtentry *rt, struct nhop_object *nh, 336 struct rt_addrinfo *info, int flags) 337 { 338 struct rt_metrics *rmx; 339 struct sockaddr *src, *dst; 340 int sa_len; 341 342 if (flags & NHR_COPY) { 343 /* Copy destination if dst is non-zero */ 344 src = rt_key(rt); 345 dst = info->rti_info[RTAX_DST]; 346 sa_len = src->sa_len; 347 if (dst != NULL) { 348 if (src->sa_len > dst->sa_len) 349 return (ENOMEM); 350 memcpy(dst, src, src->sa_len); 351 info->rti_addrs |= RTA_DST; 352 } 353 354 /* Copy mask if set && dst is non-zero */ 355 src = rt_mask(rt); 356 dst = info->rti_info[RTAX_NETMASK]; 357 if (src != NULL && dst != NULL) { 358 /* 359 * Radix stores different value in sa_len, 360 * assume rt_mask() to have the same length 361 * as rt_key() 362 */ 363 if (sa_len > dst->sa_len) 364 return (ENOMEM); 365 memcpy(dst, src, src->sa_len); 366 info->rti_addrs |= RTA_NETMASK; 367 } 368 369 /* Copy gateway is set && dst is non-zero */ 370 src = &nh->gw_sa; 371 dst = info->rti_info[RTAX_GATEWAY]; 372 if ((nhop_get_rtflags(nh) & RTF_GATEWAY) && 373 src != NULL && dst != NULL) { 374 if (src->sa_len > dst->sa_len) 375 return (ENOMEM); 376 memcpy(dst, src, src->sa_len); 377 info->rti_addrs |= RTA_GATEWAY; 378 } 379 } else { 380 info->rti_info[RTAX_DST] = rt_key(rt); 381 info->rti_addrs |= RTA_DST; 382 if (rt_mask(rt) != NULL) { 383 info->rti_info[RTAX_NETMASK] = rt_mask(rt); 384 info->rti_addrs |= RTA_NETMASK; 385 } 386 if (nhop_get_rtflags(nh) & RTF_GATEWAY) { 387 info->rti_info[RTAX_GATEWAY] = &nh->gw_sa; 388 info->rti_addrs |= RTA_GATEWAY; 389 } 390 } 391 392 rmx = info->rti_rmx; 393 if (rmx != NULL) { 394 info->rti_mflags |= RTV_MTU; 395 rmx->rmx_mtu = nh->nh_mtu; 396 } 397 398 info->rti_flags = rt->rte_flags | nhop_get_rtflags(nh); 399 info->rti_ifp = nh->nh_ifp; 400 info->rti_ifa = nh->nh_ifa; 401 if (flags & NHR_REF) { 402 if_ref(info->rti_ifp); 403 ifa_ref(info->rti_ifa); 404 } 405 406 return (0); 407 } 408 409 /* 410 * Lookups up route entry for @dst in RIB database for fib @fibnum. 411 * Exports entry data to @info using rt_exportinfo(). 412 * 413 * If @flags contains NHR_REF, refcouting is performed on rt_ifp and rt_ifa. 414 * All references can be released later by calling rib_free_info(). 415 * 416 * Returns 0 on success. 417 * Returns ENOENT for lookup failure, ENOMEM for export failure. 418 */ 419 int 420 rib_lookup_info(uint32_t fibnum, const struct sockaddr *dst, uint32_t flags, 421 uint32_t flowid, struct rt_addrinfo *info) 422 { 423 RIB_RLOCK_TRACKER; 424 struct rib_head *rh; 425 struct radix_node *rn; 426 struct rtentry *rt; 427 struct nhop_object *nh; 428 int error; 429 430 KASSERT((fibnum < rt_numfibs), ("rib_lookup_rte: bad fibnum")); 431 rh = rt_tables_get_rnh(fibnum, dst->sa_family); 432 if (rh == NULL) 433 return (ENOENT); 434 435 RIB_RLOCK(rh); 436 rn = rh->rnh_matchaddr(__DECONST(void *, dst), &rh->head); 437 if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) { 438 rt = RNTORT(rn); 439 nh = nhop_select(rt->rt_nhop, flowid); 440 /* Ensure route & ifp is UP */ 441 if (RT_LINK_IS_UP(nh->nh_ifp)) { 442 flags = (flags & NHR_REF) | NHR_COPY; 443 error = rt_exportinfo(rt, nh, info, flags); 444 RIB_RUNLOCK(rh); 445 446 return (error); 447 } 448 } 449 RIB_RUNLOCK(rh); 450 451 return (ENOENT); 452 } 453 454 /* 455 * Releases all references acquired by rib_lookup_info() when 456 * called with NHR_REF flags. 457 */ 458 void 459 rib_free_info(struct rt_addrinfo *info) 460 { 461 462 ifa_free(info->rti_ifa); 463 if_rele(info->rti_ifp); 464 } 465 466 /* 467 * Delete Routes for a Network Interface 468 * 469 * Called for each routing entry via the rnh->rnh_walktree() call above 470 * to delete all route entries referencing a detaching network interface. 471 * 472 * Arguments: 473 * rt pointer to rtentry 474 * nh pointer to nhop 475 * arg argument passed to rnh->rnh_walktree() - detaching interface 476 * 477 * Returns: 478 * 0 successful 479 * errno failed - reason indicated 480 */ 481 static int 482 rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *nh, void *arg) 483 { 484 struct ifnet *ifp = arg; 485 486 if (nh->nh_ifp != ifp) 487 return (0); 488 489 /* 490 * Protect (sorta) against walktree recursion problems 491 * with cloned routes 492 */ 493 if ((rt->rte_flags & RTF_UP) == 0) 494 return (0); 495 496 return (1); 497 } 498 499 void 500 rt_flushifroutes(struct ifnet *ifp) 501 { 502 503 rib_foreach_table_walk_del(AF_UNSPEC, rt_ifdelroute, ifp); 504 } 505 506 /* 507 * Look up rt_addrinfo for a specific fib. 508 * 509 * Assume basic consistency checks are executed by callers: 510 * RTAX_DST exists, if RTF_GATEWAY is set, RTAX_GATEWAY exists as well. 511 */ 512 int 513 rt_getifa_fib(struct rt_addrinfo *info, u_int fibnum) 514 { 515 const struct sockaddr *dst, *gateway, *ifpaddr, *ifaaddr; 516 int error, flags; 517 518 dst = info->rti_info[RTAX_DST]; 519 gateway = info->rti_info[RTAX_GATEWAY]; 520 ifpaddr = info->rti_info[RTAX_IFP]; 521 ifaaddr = info->rti_info[RTAX_IFA]; 522 flags = info->rti_flags; 523 524 /* 525 * ifp may be specified by sockaddr_dl 526 * when protocol address is ambiguous. 527 */ 528 error = 0; 529 530 /* If we have interface specified by the ifindex in the address, use it */ 531 if (info->rti_ifp == NULL && ifpaddr != NULL && 532 ifpaddr->sa_family == AF_LINK) { 533 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)ifpaddr; 534 if (sdl->sdl_index != 0) 535 info->rti_ifp = ifnet_byindex(sdl->sdl_index); 536 } 537 /* 538 * If we have source address specified, try to find it 539 * TODO: avoid enumerating all ifas on all interfaces. 540 */ 541 if (info->rti_ifa == NULL && ifaaddr != NULL) 542 info->rti_ifa = ifa_ifwithaddr(ifaaddr); 543 if (info->rti_ifa == NULL) { 544 const struct sockaddr *sa; 545 546 /* 547 * Most common use case for the userland-supplied routes. 548 * 549 * Choose sockaddr to select ifa. 550 * -- if ifp is set -- 551 * Order of preference: 552 * 1) IFA address 553 * 2) gateway address 554 * Note: for interface routes link-level gateway address 555 * is specified to indicate the interface index without 556 * specifying RTF_GATEWAY. In this case, ignore gateway 557 * Note: gateway AF may be different from dst AF. In this case, 558 * ignore gateway 559 * 3) final destination. 560 * 4) if all of these fails, try to get at least link-level ifa. 561 * -- else -- 562 * try to lookup gateway or dst in the routing table to get ifa 563 */ 564 if (info->rti_info[RTAX_IFA] != NULL) 565 sa = info->rti_info[RTAX_IFA]; 566 else if ((info->rti_flags & RTF_GATEWAY) != 0 && 567 gateway->sa_family == dst->sa_family) 568 sa = gateway; 569 else 570 sa = dst; 571 if (info->rti_ifp != NULL) { 572 info->rti_ifa = ifaof_ifpforaddr(sa, info->rti_ifp); 573 /* Case 4 */ 574 if (info->rti_ifa == NULL && gateway != NULL) 575 info->rti_ifa = ifaof_ifpforaddr(gateway, info->rti_ifp); 576 } else if (dst != NULL && gateway != NULL) 577 info->rti_ifa = ifa_ifwithroute(flags, dst, gateway, 578 fibnum); 579 else if (sa != NULL) 580 info->rti_ifa = ifa_ifwithroute(flags, sa, sa, 581 fibnum); 582 } 583 if (info->rti_ifa != NULL) { 584 if (info->rti_ifp == NULL) 585 info->rti_ifp = info->rti_ifa->ifa_ifp; 586 } else 587 error = ENETUNREACH; 588 return (error); 589 } 590 591 void 592 rt_updatemtu(struct ifnet *ifp) 593 { 594 struct rib_head *rnh; 595 int mtu; 596 int i, j; 597 598 /* 599 * Try to update rt_mtu for all routes using this interface 600 * Unfortunately the only way to do this is to traverse all 601 * routing tables in all fibs/domains. 602 */ 603 for (i = 1; i <= AF_MAX; i++) { 604 mtu = if_getmtu_family(ifp, i); 605 for (j = 0; j < rt_numfibs; j++) { 606 rnh = rt_tables_get_rnh(j, i); 607 if (rnh == NULL) 608 continue; 609 nhops_update_ifmtu(rnh, ifp, mtu); 610 } 611 } 612 } 613 614 #if 0 615 int p_sockaddr(char *buf, int buflen, struct sockaddr *s); 616 int rt_print(char *buf, int buflen, struct rtentry *rt); 617 618 int 619 p_sockaddr(char *buf, int buflen, struct sockaddr *s) 620 { 621 void *paddr = NULL; 622 623 switch (s->sa_family) { 624 case AF_INET: 625 paddr = &((struct sockaddr_in *)s)->sin_addr; 626 break; 627 case AF_INET6: 628 paddr = &((struct sockaddr_in6 *)s)->sin6_addr; 629 break; 630 } 631 632 if (paddr == NULL) 633 return (0); 634 635 if (inet_ntop(s->sa_family, paddr, buf, buflen) == NULL) 636 return (0); 637 638 return (strlen(buf)); 639 } 640 641 int 642 rt_print(char *buf, int buflen, struct rtentry *rt) 643 { 644 struct sockaddr *addr, *mask; 645 int i = 0; 646 647 addr = rt_key(rt); 648 mask = rt_mask(rt); 649 650 i = p_sockaddr(buf, buflen, addr); 651 if (!(rt->rt_flags & RTF_HOST)) { 652 buf[i++] = '/'; 653 i += p_sockaddr(buf + i, buflen - i, mask); 654 } 655 656 if (rt->rt_flags & RTF_GATEWAY) { 657 buf[i++] = '>'; 658 i += p_sockaddr(buf + i, buflen - i, &rt->rt_nhop->gw_sa); 659 } 660 661 return (i); 662 } 663 #endif 664 665 void 666 rt_maskedcopy(struct sockaddr *src, struct sockaddr *dst, struct sockaddr *netmask) 667 { 668 u_char *cp1 = (u_char *)src; 669 u_char *cp2 = (u_char *)dst; 670 u_char *cp3 = (u_char *)netmask; 671 u_char *cplim = cp2 + *cp3; 672 u_char *cplim2 = cp2 + *cp1; 673 674 *cp2++ = *cp1++; *cp2++ = *cp1++; /* copies sa_len & sa_family */ 675 cp3 += 2; 676 if (cplim > cplim2) 677 cplim = cplim2; 678 while (cp2 < cplim) 679 *cp2++ = *cp1++ & *cp3++; 680 if (cp2 < cplim2) 681 bzero((caddr_t)cp2, (unsigned)(cplim2 - cp2)); 682 } 683 684 /* 685 * Announce interface address arrival/withdraw 686 * Returns 0 on success. 687 */ 688 int 689 rt_addrmsg(int cmd, struct ifaddr *ifa, int fibnum) 690 { 691 692 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE, 693 ("unexpected cmd %d", cmd)); 694 KASSERT((fibnum >= 0 && fibnum < rt_numfibs), 695 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs)); 696 697 EVENTHANDLER_DIRECT_INVOKE(rt_addrmsg, ifa, cmd); 698 699 if (V_rt_add_addr_allfibs) 700 fibnum = RT_ALL_FIBS; 701 return (rtsock_addrmsg(cmd, ifa, fibnum)); 702 } 703 704 /* 705 * Announce kernel-originated route addition/removal to rtsock based on @rt data. 706 * cmd: RTM_ cmd 707 * @rt: valid rtentry 708 * @nh: nhop object to announce 709 * @fibnum: fib id or RT_ALL_FIBS 710 * 711 * Returns 0 on success. 712 */ 713 int 714 rt_routemsg(int cmd, struct rtentry *rt, struct nhop_object *nh, 715 int fibnum) 716 { 717 718 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE, 719 ("unexpected cmd %d", cmd)); 720 721 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs), 722 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs)); 723 724 KASSERT(rt_key(rt) != NULL, (":%s: rt_key must be supplied", __func__)); 725 726 return (rtsock_routemsg(cmd, rt, nh, fibnum)); 727 } 728 729 /* 730 * Announce kernel-originated route addition/removal to rtsock based on @rt data. 731 * cmd: RTM_ cmd 732 * @info: addrinfo structure with valid data. 733 * @fibnum: fib id or RT_ALL_FIBS 734 * 735 * Returns 0 on success. 736 */ 737 int 738 rt_routemsg_info(int cmd, struct rt_addrinfo *info, int fibnum) 739 { 740 741 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE || cmd == RTM_CHANGE, 742 ("unexpected cmd %d", cmd)); 743 744 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs), 745 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs)); 746 747 KASSERT(info->rti_info[RTAX_DST] != NULL, (":%s: RTAX_DST must be supplied", __func__)); 748 749 return (rtsock_routemsg_info(cmd, info, fibnum)); 750 } 751