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/malloc.h> 47#include <sys/mbuf.h> 48#include <sys/socket.h> 49#include <sys/sysctl.h> 50#include <sys/syslog.h> 51#include <sys/sysproto.h> 52#include <sys/proc.h> 53#include <sys/domain.h> 54#include <sys/eventhandler.h> 55#include <sys/kernel.h> 56#include <sys/lock.h> 57#include <sys/rmlock.h> 58 59#include <net/if.h> 60#include <net/if_var.h> 61#include <net/if_dl.h> 62#include <net/route.h> 63#include <net/route/route_ctl.h> 64#include <net/route/route_var.h> 65#include <net/route/nhop.h> 66#include <net/vnet.h> 67 68#include <netinet/in.h> 69#include <netinet/ip_mroute.h> 70 71VNET_PCPUSTAT_DEFINE(struct rtstat, rtstat); 72 73VNET_PCPUSTAT_SYSINIT(rtstat); 74#ifdef VIMAGE 75VNET_PCPUSTAT_SYSUNINIT(rtstat); 76#endif 77 78EVENTHANDLER_LIST_DEFINE(rt_addrmsg); 79 80static int rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *, 81 void *arg); 82static int rt_exportinfo(struct rtentry *rt, struct nhop_object *nh, 83 struct rt_addrinfo *info, int flags); 84 85/* 86 * route initialization must occur before ip6_init2(), which happenas at 87 * SI_ORDER_MIDDLE. 88 */ 89static void 90route_init(void) 91{ 92 93 nhops_init(); 94} 95SYSINIT(route_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, route_init, NULL); 96 97struct rib_head * 98rt_table_init(int offset, int family, u_int fibnum) 99{ 100 struct rib_head *rh; 101 102 rh = malloc(sizeof(struct rib_head), M_RTABLE, M_WAITOK | M_ZERO); 103 104 /* TODO: These details should be hidded inside radix.c */ 105 /* Init masks tree */ 106 rn_inithead_internal(&rh->head, rh->rnh_nodes, offset); 107 rn_inithead_internal(&rh->rmhead.head, rh->rmhead.mask_nodes, 0); 108 rh->head.rnh_masks = &rh->rmhead; 109 110 /* Save metadata associated with this routing table. */ 111 rh->rib_family = family; 112 rh->rib_fibnum = fibnum; 113#ifdef VIMAGE 114 rh->rib_vnet = curvnet; 115#endif 116 117 tmproutes_init(rh); 118 119 /* Init locks */ 120 RIB_LOCK_INIT(rh); 121 122 nhops_init_rib(rh); 123 124 /* Init subscription system */ 125 rib_init_subscriptions(rh); 126 127 /* Finally, set base callbacks */ 128 rh->rnh_addaddr = rn_addroute; 129 rh->rnh_deladdr = rn_delete; 130 rh->rnh_matchaddr = rn_match; 131 rh->rnh_lookup = rn_lookup; 132 rh->rnh_walktree = rn_walktree; 133 rh->rnh_walktree_from = rn_walktree_from; 134 135 return (rh); 136} 137 138static int 139rt_freeentry(struct radix_node *rn, void *arg) 140{ 141 struct radix_head * const rnh = arg; 142 struct radix_node *x; 143 144 x = (struct radix_node *)rn_delete(rn + 2, NULL, rnh); 145 if (x != NULL) 146 R_Free(x); 147 return (0); 148} 149 150void 151rt_table_destroy(struct rib_head *rh) 152{ 153 154 RIB_WLOCK(rh); 155 rh->rib_dying = true; 156 RIB_WUNLOCK(rh); 157 158#ifdef FIB_ALGO 159 fib_destroy_rib(rh); 160#endif 161 162 tmproutes_destroy(rh); 163 164 rn_walktree(&rh->rmhead.head, rt_freeentry, &rh->rmhead.head); 165 166 nhops_destroy_rib(rh); 167 168 rib_destroy_subscriptions(rh); 169 170 /* Assume table is already empty */ 171 RIB_LOCK_DESTROY(rh); 172 free(rh, M_RTABLE); 173} 174 175/* 176 * Adds a temporal redirect entry to the routing table. 177 * @fibnum: fib number 178 * @dst: destination to install redirect to 179 * @gateway: gateway to go via 180 * @author: sockaddr of originating router, can be NULL 181 * @ifp: interface to use for the redirected route 182 * @flags: set of flags to add. Allowed: RTF_GATEWAY 183 * @lifetime_sec: time in seconds to expire this redirect. 184 * 185 * Retuns 0 on success, errno otherwise. 186 */ 187int 188rib_add_redirect(u_int fibnum, struct sockaddr *dst, struct sockaddr *gateway, 189 struct sockaddr *author, struct ifnet *ifp, int flags, int lifetime_sec) 190{ 191 struct rib_cmd_info rc; 192 int error; 193 struct rt_addrinfo info; 194 struct rt_metrics rti_rmx; 195 struct ifaddr *ifa; 196 197 NET_EPOCH_ASSERT(); 198 199 if (rt_tables_get_rnh(fibnum, dst->sa_family) == NULL) 200 return (EAFNOSUPPORT); 201 202 /* Verify the allowed flag mask. */ 203 KASSERT(((flags & ~(RTF_GATEWAY)) == 0), 204 ("invalid redirect flags: %x", flags)); 205 flags |= RTF_HOST | RTF_DYNAMIC; 206 207 /* Get the best ifa for the given interface and gateway. */ 208 if ((ifa = ifaof_ifpforaddr(gateway, ifp)) == NULL) 209 return (ENETUNREACH); 210 ifa_ref(ifa); 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 ifa_free(ifa); 228 229 if (error != 0) { 230 /* TODO: add per-fib redirect stats. */ 231 return (error); 232 } 233 234 RTSTAT_INC(rts_dynamic); 235 236 /* Send notification of a route addition to userland. */ 237 bzero(&info, sizeof(info)); 238 info.rti_info[RTAX_DST] = dst; 239 info.rti_info[RTAX_GATEWAY] = gateway; 240 info.rti_info[RTAX_AUTHOR] = author; 241 rt_missmsg_fib(RTM_REDIRECT, &info, flags | RTF_UP, error, fibnum); 242 243 return (0); 244} 245 246/* 247 * Routing table ioctl interface. 248 */ 249int 250rtioctl_fib(u_long req, caddr_t data, u_int fibnum) 251{ 252 253 /* 254 * If more ioctl commands are added here, make sure the proper 255 * super-user checks are being performed because it is possible for 256 * prison-root to make it this far if raw sockets have been enabled 257 * in jails. 258 */ 259#ifdef INET 260 /* Multicast goop, grrr... */ 261 return mrt_ioctl ? mrt_ioctl(req, data, fibnum) : EOPNOTSUPP; 262#else /* INET */ 263 return ENXIO; 264#endif /* INET */ 265} 266 267struct ifaddr * 268ifa_ifwithroute(int flags, const struct sockaddr *dst, 269 const struct sockaddr *gateway, u_int fibnum) 270{ 271 struct ifaddr *ifa; 272 273 NET_EPOCH_ASSERT(); 274 if ((flags & RTF_GATEWAY) == 0) { 275 /* 276 * If we are adding a route to an interface, 277 * and the interface is a pt to pt link 278 * we should search for the destination 279 * as our clue to the interface. Otherwise 280 * we can use the local address. 281 */ 282 ifa = NULL; 283 if (flags & RTF_HOST) 284 ifa = ifa_ifwithdstaddr(dst, fibnum); 285 if (ifa == NULL) 286 ifa = ifa_ifwithaddr(gateway); 287 } else { 288 /* 289 * If we are adding a route to a remote net 290 * or host, the gateway may still be on the 291 * other end of a pt to pt link. 292 */ 293 ifa = ifa_ifwithdstaddr(gateway, fibnum); 294 } 295 if (ifa == NULL) 296 ifa = ifa_ifwithnet(gateway, 0, fibnum); 297 if (ifa == NULL) { 298 struct nhop_object *nh; 299 300 nh = rib_lookup(fibnum, gateway, NHR_NONE, 0); 301 302 /* 303 * dismiss a gateway that is reachable only 304 * through the default router 305 */ 306 if ((nh == NULL) || (nh->nh_flags & NHF_DEFAULT)) 307 return (NULL); 308 ifa = nh->nh_ifa; 309 } 310 if (ifa->ifa_addr->sa_family != dst->sa_family) { 311 struct ifaddr *oifa = ifa; 312 ifa = ifaof_ifpforaddr(dst, ifa->ifa_ifp); 313 if (ifa == NULL) 314 ifa = oifa; 315 } 316 317 return (ifa); 318} 319 320/* 321 * Copy most of @rt data into @info. 322 * 323 * If @flags contains NHR_COPY, copies dst,netmask and gw to the 324 * pointers specified by @info structure. Assume such pointers 325 * are zeroed sockaddr-like structures with sa_len field initialized 326 * to reflect size of the provided buffer. if no NHR_COPY is specified, 327 * point dst,netmask and gw @info fields to appropriate @rt values. 328 * 329 * if @flags contains NHR_REF, do refcouting on rt_ifp and rt_ifa. 330 * 331 * Returns 0 on success. 332 */ 333static int 334rt_exportinfo(struct rtentry *rt, struct nhop_object *nh, 335 struct rt_addrinfo *info, int flags) 336{ 337 struct rt_metrics *rmx; 338 struct sockaddr *src, *dst; 339 int sa_len; 340 341 if (flags & NHR_COPY) { 342 /* Copy destination if dst is non-zero */ 343 src = rt_key(rt); 344 dst = info->rti_info[RTAX_DST]; 345 sa_len = src->sa_len; 346 if (dst != NULL) { 347 if (src->sa_len > dst->sa_len) 348 return (ENOMEM); 349 memcpy(dst, src, src->sa_len); 350 info->rti_addrs |= RTA_DST; 351 } 352 353 /* Copy mask if set && dst is non-zero */ 354 src = rt_mask(rt); 355 dst = info->rti_info[RTAX_NETMASK]; 356 if (src != NULL && dst != NULL) { 357 /* 358 * Radix stores different value in sa_len, 359 * assume rt_mask() to have the same length 360 * as rt_key() 361 */ 362 if (sa_len > dst->sa_len) 363 return (ENOMEM); 364 memcpy(dst, src, src->sa_len); 365 info->rti_addrs |= RTA_NETMASK; 366 } 367 368 /* Copy gateway is set && dst is non-zero */ 369 src = &nh->gw_sa; 370 dst = info->rti_info[RTAX_GATEWAY]; 371 if ((nhop_get_rtflags(nh) & RTF_GATEWAY) && 372 src != NULL && dst != NULL) { 373 if (src->sa_len > dst->sa_len) 374 return (ENOMEM); 375 memcpy(dst, src, src->sa_len); 376 info->rti_addrs |= RTA_GATEWAY; 377 } 378 } else { 379 info->rti_info[RTAX_DST] = rt_key(rt); 380 info->rti_addrs |= RTA_DST; 381 if (rt_mask(rt) != NULL) { 382 info->rti_info[RTAX_NETMASK] = rt_mask(rt); 383 info->rti_addrs |= RTA_NETMASK; 384 } 385 if (nhop_get_rtflags(nh) & RTF_GATEWAY) { 386 info->rti_info[RTAX_GATEWAY] = &nh->gw_sa; 387 info->rti_addrs |= RTA_GATEWAY; 388 } 389 } 390 391 rmx = info->rti_rmx; 392 if (rmx != NULL) { 393 info->rti_mflags |= RTV_MTU; 394 rmx->rmx_mtu = nh->nh_mtu; 395 } 396 397 info->rti_flags = rt->rte_flags | nhop_get_rtflags(nh); 398 info->rti_ifp = nh->nh_ifp; 399 info->rti_ifa = nh->nh_ifa; 400 if (flags & NHR_REF) { 401 if_ref(info->rti_ifp); 402 ifa_ref(info->rti_ifa); 403 } 404 405 return (0); 406} 407 408/* 409 * Lookups up route entry for @dst in RIB database for fib @fibnum. 410 * Exports entry data to @info using rt_exportinfo(). 411 * 412 * If @flags contains NHR_REF, refcouting is performed on rt_ifp and rt_ifa. 413 * All references can be released later by calling rib_free_info(). 414 * 415 * Returns 0 on success. 416 * Returns ENOENT for lookup failure, ENOMEM for export failure. 417 */ 418int 419rib_lookup_info(uint32_t fibnum, const struct sockaddr *dst, uint32_t flags, 420 uint32_t flowid, struct rt_addrinfo *info) 421{ 422 RIB_RLOCK_TRACKER; 423 struct rib_head *rh; 424 struct radix_node *rn; 425 struct rtentry *rt; 426 struct nhop_object *nh; 427 int error; 428 429 KASSERT((fibnum < rt_numfibs), ("rib_lookup_rte: bad fibnum")); 430 rh = rt_tables_get_rnh(fibnum, dst->sa_family); 431 if (rh == NULL) 432 return (ENOENT); 433 434 RIB_RLOCK(rh); 435 rn = rh->rnh_matchaddr(__DECONST(void *, dst), &rh->head); 436 if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) { 437 rt = RNTORT(rn); 438 nh = nhop_select(rt->rt_nhop, flowid); 439 /* Ensure route & ifp is UP */ 440 if (RT_LINK_IS_UP(nh->nh_ifp)) { 441 flags = (flags & NHR_REF) | NHR_COPY; 442 error = rt_exportinfo(rt, nh, info, flags); 443 RIB_RUNLOCK(rh); 444 445 return (error); 446 } 447 } 448 RIB_RUNLOCK(rh); 449 450 return (ENOENT); 451} 452 453/* 454 * Releases all references acquired by rib_lookup_info() when 455 * called with NHR_REF flags. 456 */ 457void 458rib_free_info(struct rt_addrinfo *info) 459{ 460 461 ifa_free(info->rti_ifa); 462 if_rele(info->rti_ifp); 463} 464 465/* 466 * Delete Routes for a Network Interface 467 * 468 * Called for each routing entry via the rnh->rnh_walktree() call above 469 * to delete all route entries referencing a detaching network interface. 470 * 471 * Arguments: 472 * rt pointer to rtentry 473 * nh pointer to nhop 474 * arg argument passed to rnh->rnh_walktree() - detaching interface 475 * 476 * Returns: 477 * 0 successful 478 * errno failed - reason indicated 479 */ 480static int 481rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *nh, void *arg) 482{ 483 struct ifnet *ifp = arg; 484 485 if (nh->nh_ifp != ifp) 486 return (0); 487 488 /* 489 * Protect (sorta) against walktree recursion problems 490 * with cloned routes 491 */ 492 if ((rt->rte_flags & RTF_UP) == 0) 493 return (0); 494 495 return (1); 496} 497 498void 499rt_flushifroutes(struct ifnet *ifp) 500{ 501 502 rib_foreach_table_walk_del(AF_UNSPEC, rt_ifdelroute, ifp); 503} 504 505/* 506 * Look up rt_addrinfo for a specific fib. Note that if rti_ifa is defined, 507 * it will be referenced so the caller must free it. 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 */ 512int 513rt_getifa_fib(struct rt_addrinfo *info, u_int fibnum) 514{ 515 const struct sockaddr *dst, *gateway, *ifpaddr, *ifaaddr; 516 struct epoch_tracker et; 517 int needref, error, flags; 518 519 dst = info->rti_info[RTAX_DST]; 520 gateway = info->rti_info[RTAX_GATEWAY]; 521 ifpaddr = info->rti_info[RTAX_IFP]; 522 ifaaddr = info->rti_info[RTAX_IFA]; 523 flags = info->rti_flags; 524 525 /* 526 * ifp may be specified by sockaddr_dl 527 * when protocol address is ambiguous. 528 */ 529 error = 0; 530 needref = (info->rti_ifa == NULL); 531 NET_EPOCH_ENTER(et); 532 533 /* If we have interface specified by the ifindex in the address, use it */ 534 if (info->rti_ifp == NULL && ifpaddr != NULL && 535 ifpaddr->sa_family == AF_LINK) { 536 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)ifpaddr; 537 if (sdl->sdl_index != 0) 538 info->rti_ifp = ifnet_byindex(sdl->sdl_index); 539 } 540 /* 541 * If we have source address specified, try to find it 542 * TODO: avoid enumerating all ifas on all interfaces. 543 */ 544 if (info->rti_ifa == NULL && ifaaddr != NULL) 545 info->rti_ifa = ifa_ifwithaddr(ifaaddr); 546 if (info->rti_ifa == NULL) { 547 const struct sockaddr *sa; 548 549 /* 550 * Most common use case for the userland-supplied routes. 551 * 552 * Choose sockaddr to select ifa. 553 * -- if ifp is set -- 554 * Order of preference: 555 * 1) IFA address 556 * 2) gateway address 557 * Note: for interface routes link-level gateway address 558 * is specified to indicate the interface index without 559 * specifying RTF_GATEWAY. In this case, ignore gateway 560 * Note: gateway AF may be different from dst AF. In this case, 561 * ignore gateway 562 * 3) final destination. 563 * 4) if all of these fails, try to get at least link-level ifa. 564 * -- else -- 565 * try to lookup gateway or dst in the routing table to get ifa 566 */ 567 if (info->rti_info[RTAX_IFA] != NULL) 568 sa = info->rti_info[RTAX_IFA]; 569 else if ((info->rti_flags & RTF_GATEWAY) != 0 && 570 gateway->sa_family == dst->sa_family) 571 sa = gateway; 572 else 573 sa = dst; 574 if (info->rti_ifp != NULL) { 575 info->rti_ifa = ifaof_ifpforaddr(sa, info->rti_ifp); 576 /* Case 4 */ 577 if (info->rti_ifa == NULL && gateway != NULL) 578 info->rti_ifa = ifaof_ifpforaddr(gateway, info->rti_ifp); 579 } else if (dst != NULL && gateway != NULL) 580 info->rti_ifa = ifa_ifwithroute(flags, dst, gateway, 581 fibnum); 582 else if (sa != NULL) 583 info->rti_ifa = ifa_ifwithroute(flags, sa, sa, 584 fibnum); 585 } 586 if (needref && info->rti_ifa != NULL) { 587 if (info->rti_ifp == NULL) 588 info->rti_ifp = info->rti_ifa->ifa_ifp; 589 ifa_ref(info->rti_ifa); 590 } else 591 error = ENETUNREACH; 592 NET_EPOCH_EXIT(et); 593 return (error); 594} 595 596void 597rt_updatemtu(struct ifnet *ifp) 598{ 599 struct rib_head *rnh; 600 int mtu; 601 int i, j; 602 603 /* 604 * Try to update rt_mtu for all routes using this interface 605 * Unfortunately the only way to do this is to traverse all 606 * routing tables in all fibs/domains. 607 */ 608 for (i = 1; i <= AF_MAX; i++) { 609 mtu = if_getmtu_family(ifp, i); 610 for (j = 0; j < rt_numfibs; j++) { 611 rnh = rt_tables_get_rnh(j, i); 612 if (rnh == NULL) 613 continue; 614 nhops_update_ifmtu(rnh, ifp, mtu); 615 } 616 } 617} 618 619#if 0 620int p_sockaddr(char *buf, int buflen, struct sockaddr *s); 621int rt_print(char *buf, int buflen, struct rtentry *rt); 622 623int 624p_sockaddr(char *buf, int buflen, struct sockaddr *s) 625{ 626 void *paddr = NULL; 627 628 switch (s->sa_family) { 629 case AF_INET: 630 paddr = &((struct sockaddr_in *)s)->sin_addr; 631 break; 632 case AF_INET6: 633 paddr = &((struct sockaddr_in6 *)s)->sin6_addr; 634 break; 635 } 636 637 if (paddr == NULL) 638 return (0); 639 640 if (inet_ntop(s->sa_family, paddr, buf, buflen) == NULL) 641 return (0); 642 643 return (strlen(buf)); 644} 645 646int 647rt_print(char *buf, int buflen, struct rtentry *rt) 648{ 649 struct sockaddr *addr, *mask; 650 int i = 0; 651 652 addr = rt_key(rt); 653 mask = rt_mask(rt); 654 655 i = p_sockaddr(buf, buflen, addr); 656 if (!(rt->rt_flags & RTF_HOST)) { 657 buf[i++] = '/'; 658 i += p_sockaddr(buf + i, buflen - i, mask); 659 } 660 661 if (rt->rt_flags & RTF_GATEWAY) { 662 buf[i++] = '>'; 663 i += p_sockaddr(buf + i, buflen - i, &rt->rt_nhop->gw_sa); 664 } 665 666 return (i); 667} 668#endif 669 670void 671rt_maskedcopy(struct sockaddr *src, struct sockaddr *dst, struct sockaddr *netmask) 672{ 673 u_char *cp1 = (u_char *)src; 674 u_char *cp2 = (u_char *)dst; 675 u_char *cp3 = (u_char *)netmask; 676 u_char *cplim = cp2 + *cp3; 677 u_char *cplim2 = cp2 + *cp1; 678 679 *cp2++ = *cp1++; *cp2++ = *cp1++; /* copies sa_len & sa_family */ 680 cp3 += 2; 681 if (cplim > cplim2) 682 cplim = cplim2; 683 while (cp2 < cplim) 684 *cp2++ = *cp1++ & *cp3++; 685 if (cp2 < cplim2) 686 bzero((caddr_t)cp2, (unsigned)(cplim2 - cp2)); 687} 688 689/* 690 * Announce interface address arrival/withdraw 691 * Returns 0 on success. 692 */ 693int 694rt_addrmsg(int cmd, struct ifaddr *ifa, int fibnum) 695{ 696 697 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE, 698 ("unexpected cmd %d", cmd)); 699 KASSERT((fibnum >= 0 && fibnum < rt_numfibs), 700 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs)); 701 702 EVENTHANDLER_DIRECT_INVOKE(rt_addrmsg, ifa, cmd); 703 704 if (V_rt_add_addr_allfibs) 705 fibnum = RT_ALL_FIBS; 706 return (rtsock_addrmsg(cmd, ifa, fibnum)); 707} 708 709/* 710 * Announce kernel-originated route addition/removal to rtsock based on @rt data. 711 * cmd: RTM_ cmd 712 * @rt: valid rtentry 713 * @nh: nhop object to announce 714 * @fibnum: fib id or RT_ALL_FIBS 715 * 716 * Returns 0 on success. 717 */ 718int 719rt_routemsg(int cmd, struct rtentry *rt, struct nhop_object *nh, 720 int fibnum) 721{ 722 723 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE, 724 ("unexpected cmd %d", cmd)); 725 726 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs), 727 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs)); 728 729 KASSERT(rt_key(rt) != NULL, (":%s: rt_key must be supplied", __func__)); 730 731 return (rtsock_routemsg(cmd, rt, nh, fibnum)); 732} 733 734/* 735 * Announce kernel-originated route addition/removal to rtsock based on @rt data. 736 * cmd: RTM_ cmd 737 * @info: addrinfo structure with valid data. 738 * @fibnum: fib id or RT_ALL_FIBS 739 * 740 * Returns 0 on success. 741 */ 742int 743rt_routemsg_info(int cmd, struct rt_addrinfo *info, int fibnum) 744{ 745 746 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE || cmd == RTM_CHANGE, 747 ("unexpected cmd %d", cmd)); 748 749 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs), 750 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs)); 751 752 KASSERT(info->rti_info[RTAX_DST] != NULL, (":%s: RTAX_DST must be supplied", __func__)); 753 754 return (rtsock_routemsg_info(cmd, info, fibnum)); 755} 756