Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/net/route.c
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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/devctl.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_private.h> 63 #include <net/if_dl.h> 64 #include <net/route.h> 65 #include <net/route/route_ctl.h> 66 #include <net/route/route_var.h> 67 #include <net/route/nhop.h> 68 #include <net/vnet.h> 69 70 #include <netinet/in.h> 71 #include <netinet/ip_mroute.h> 72 #include <netinet6/in6_var.h> 73 74 VNET_PCPUSTAT_DEFINE(struct rtstat, rtstat); 75 76 VNET_PCPUSTAT_SYSINIT(rtstat); 77 #ifdef VIMAGE 78 VNET_PCPUSTAT_SYSUNINIT(rtstat); 79 #endif 80 81 EVENTHANDLER_LIST_DEFINE(rt_addrmsg); 82 83 static int rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *, 84 void *arg); 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 route_nhop_data rnd = { .rnd_weight = RT_DEFAULT_WEIGHT }; 193 struct rib_cmd_info rc; 194 struct ifaddr *ifa; 195 int error; 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); 210 211 struct nhop_object *nh = nhop_alloc(fibnum, dst->sa_family); 212 if (nh == NULL) 213 return (ENOMEM); 214 215 nhop_set_gw(nh, gateway, flags & RTF_GATEWAY); 216 nhop_set_transmit_ifp(nh, ifp); 217 nhop_set_src(nh, ifa); 218 nhop_set_pxtype_flag(nh, NHF_HOST); 219 nhop_set_expire(nh, lifetime_sec + time_uptime); 220 nhop_set_redirect(nh, true); 221 nhop_set_origin(nh, NH_ORIGIN_REDIRECT); 222 rnd.rnd_nhop = nhop_get_nhop(nh, &error); 223 if (error == 0) { 224 error = rib_add_route_px(fibnum, dst, -1, 225 &rnd, RTM_F_CREATE, &rc); 226 } 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 struct rt_addrinfo info = { 237 .rti_info[RTAX_DST] = dst, 238 .rti_info[RTAX_GATEWAY] = gateway, 239 .rti_info[RTAX_AUTHOR] = author, 240 }; 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 */ 249 int 250 rtioctl_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 } 266 267 struct ifaddr * 268 ifa_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 * Delete Routes for a Network Interface 322 * 323 * Called for each routing entry via the rnh->rnh_walktree() call above 324 * to delete all route entries referencing a detaching network interface. 325 * 326 * Arguments: 327 * rt pointer to rtentry 328 * nh pointer to nhop 329 * arg argument passed to rnh->rnh_walktree() - detaching interface 330 * 331 * Returns: 332 * 0 successful 333 * errno failed - reason indicated 334 */ 335 static int 336 rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *nh, void *arg) 337 { 338 struct ifnet *ifp = arg; 339 340 if (nh->nh_ifp != ifp) 341 return (0); 342 343 /* 344 * Protect (sorta) against walktree recursion problems 345 * with cloned routes 346 */ 347 if ((rt->rte_flags & RTF_UP) == 0) 348 return (0); 349 350 return (1); 351 } 352 353 void 354 rt_flushifroutes(struct ifnet *ifp) 355 { 356 357 rib_foreach_table_walk_del(AF_UNSPEC, rt_ifdelroute, ifp); 358 } 359 360 /* 361 * Tries to extract interface from RTAX_IFP passed in rt_addrinfo. 362 * Interface can be specified ether as interface index (sdl_index) or 363 * the interface name (sdl_data). 364 * 365 * Returns found ifp or NULL 366 */ 367 static struct ifnet * 368 info_get_ifp(struct rt_addrinfo *info) 369 { 370 const struct sockaddr_dl *sdl; 371 372 sdl = (const struct sockaddr_dl *)info->rti_info[RTAX_IFP]; 373 if (sdl->sdl_family != AF_LINK) 374 return (NULL); 375 376 if (sdl->sdl_index != 0) 377 return (ifnet_byindex(sdl->sdl_index)); 378 if (sdl->sdl_nlen > 0) { 379 char if_name[IF_NAMESIZE]; 380 if (sdl->sdl_nlen + offsetof(struct sockaddr_dl, sdl_data) > sdl->sdl_len) 381 return (NULL); 382 if (sdl->sdl_nlen >= IF_NAMESIZE) 383 return (NULL); 384 bzero(if_name, sizeof(if_name)); 385 memcpy(if_name, sdl->sdl_data, sdl->sdl_nlen); 386 return (ifunit(if_name)); 387 } 388 389 return (NULL); 390 } 391 392 /* 393 * Calculates proper ifa/ifp for the cases when gateway AF is different 394 * from dst AF. 395 * 396 * Returns 0 on success. 397 */ 398 __noinline static int 399 rt_getifa_family(struct rt_addrinfo *info, uint32_t fibnum) 400 { 401 if (info->rti_ifp == NULL) { 402 struct ifaddr *ifa = NULL; 403 /* 404 * No transmit interface specified. Guess it by checking gw sa. 405 */ 406 const struct sockaddr *gw = info->rti_info[RTAX_GATEWAY]; 407 ifa = ifa_ifwithroute(RTF_GATEWAY, gw, gw, fibnum); 408 if (ifa == NULL) 409 return (ENETUNREACH); 410 info->rti_ifp = ifa->ifa_ifp; 411 } 412 413 /* Prefer address from outgoing interface */ 414 info->rti_ifa = ifaof_ifpforaddr(info->rti_info[RTAX_DST], info->rti_ifp); 415 #ifdef INET 416 if (info->rti_ifa == NULL) { 417 /* Use first found IPv4 address */ 418 bool loopback_ok = info->rti_ifp->if_flags & IFF_LOOPBACK; 419 info->rti_ifa = (struct ifaddr *)in_findlocal(fibnum, loopback_ok); 420 } 421 #endif 422 if (info->rti_ifa == NULL) 423 return (ENETUNREACH); 424 return (0); 425 } 426 427 /* 428 * Fills in rti_ifp and rti_ifa for the provided fib. 429 * 430 * Assume basic consistency checks are executed by callers: 431 * RTAX_DST exists, if RTF_GATEWAY is set, RTAX_GATEWAY exists as well. 432 */ 433 int 434 rt_getifa_fib(struct rt_addrinfo *info, u_int fibnum) 435 { 436 const struct sockaddr *dst, *gateway, *ifaaddr; 437 int error, flags; 438 439 dst = info->rti_info[RTAX_DST]; 440 gateway = info->rti_info[RTAX_GATEWAY]; 441 ifaaddr = info->rti_info[RTAX_IFA]; 442 flags = info->rti_flags; 443 444 /* 445 * ifp may be specified by sockaddr_dl 446 * when protocol address is ambiguous. 447 */ 448 error = 0; 449 450 /* If we have interface specified by RTAX_IFP address, try to use it */ 451 if ((info->rti_ifp == NULL) && (info->rti_info[RTAX_IFP] != NULL)) 452 info->rti_ifp = info_get_ifp(info); 453 /* 454 * If we have source address specified, try to find it 455 * TODO: avoid enumerating all ifas on all interfaces. 456 */ 457 if (info->rti_ifa == NULL && ifaaddr != NULL) 458 info->rti_ifa = ifa_ifwithaddr(ifaaddr); 459 if ((info->rti_ifa == NULL) && ((info->rti_flags & RTF_GATEWAY) != 0) && 460 (gateway->sa_family != dst->sa_family)) 461 return (rt_getifa_family(info, fibnum)); 462 if (info->rti_ifa == NULL) { 463 const struct sockaddr *sa; 464 465 /* 466 * Most common use case for the userland-supplied routes. 467 * 468 * Choose sockaddr to select ifa. 469 * -- if ifp is set -- 470 * Order of preference: 471 * 1) IFA address 472 * 2) gateway address 473 * Note: for interface routes link-level gateway address 474 * is specified to indicate the interface index without 475 * specifying RTF_GATEWAY. In this case, ignore gateway 476 * Note: gateway AF may be different from dst AF. In this case, 477 * ignore gateway 478 * 3) final destination. 479 * 4) if all of these fails, try to get at least link-level ifa. 480 * -- else -- 481 * try to lookup gateway or dst in the routing table to get ifa 482 */ 483 if (info->rti_info[RTAX_IFA] != NULL) 484 sa = info->rti_info[RTAX_IFA]; 485 else if ((info->rti_flags & RTF_GATEWAY) != 0 && 486 gateway->sa_family == dst->sa_family) 487 sa = gateway; 488 else 489 sa = dst; 490 if (info->rti_ifp != NULL) { 491 info->rti_ifa = ifaof_ifpforaddr(sa, info->rti_ifp); 492 /* Case 4 */ 493 if (info->rti_ifa == NULL && gateway != NULL) 494 info->rti_ifa = ifaof_ifpforaddr(gateway, info->rti_ifp); 495 } else if (dst != NULL && gateway != NULL) 496 info->rti_ifa = ifa_ifwithroute(flags, dst, gateway, 497 fibnum); 498 else if (sa != NULL) 499 info->rti_ifa = ifa_ifwithroute(flags, sa, sa, 500 fibnum); 501 } 502 if (info->rti_ifa != NULL) { 503 if (info->rti_ifp == NULL) 504 info->rti_ifp = info->rti_ifa->ifa_ifp; 505 } else 506 error = ENETUNREACH; 507 return (error); 508 } 509 510 void 511 rt_updatemtu(struct ifnet *ifp) 512 { 513 struct rib_head *rnh; 514 int mtu; 515 int i, j; 516 517 /* 518 * Try to update rt_mtu for all routes using this interface 519 * Unfortunately the only way to do this is to traverse all 520 * routing tables in all fibs/domains. 521 */ 522 for (i = 1; i <= AF_MAX; i++) { 523 mtu = if_getmtu_family(ifp, i); 524 for (j = 0; j < rt_numfibs; j++) { 525 rnh = rt_tables_get_rnh(j, i); 526 if (rnh == NULL) 527 continue; 528 nhops_update_ifmtu(rnh, ifp, mtu); 529 } 530 } 531 } 532 533 #if 0 534 int p_sockaddr(char *buf, int buflen, struct sockaddr *s); 535 int rt_print(char *buf, int buflen, struct rtentry *rt); 536 537 int 538 p_sockaddr(char *buf, int buflen, struct sockaddr *s) 539 { 540 void *paddr = NULL; 541 542 switch (s->sa_family) { 543 case AF_INET: 544 paddr = &((struct sockaddr_in *)s)->sin_addr; 545 break; 546 case AF_INET6: 547 paddr = &((struct sockaddr_in6 *)s)->sin6_addr; 548 break; 549 } 550 551 if (paddr == NULL) 552 return (0); 553 554 if (inet_ntop(s->sa_family, paddr, buf, buflen) == NULL) 555 return (0); 556 557 return (strlen(buf)); 558 } 559 560 int 561 rt_print(char *buf, int buflen, struct rtentry *rt) 562 { 563 struct sockaddr *addr, *mask; 564 int i = 0; 565 566 addr = rt_key(rt); 567 mask = rt_mask(rt); 568 569 i = p_sockaddr(buf, buflen, addr); 570 if (!(rt->rt_flags & RTF_HOST)) { 571 buf[i++] = '/'; 572 i += p_sockaddr(buf + i, buflen - i, mask); 573 } 574 575 if (rt->rt_flags & RTF_GATEWAY) { 576 buf[i++] = '>'; 577 i += p_sockaddr(buf + i, buflen - i, &rt->rt_nhop->gw_sa); 578 } 579 580 return (i); 581 } 582 #endif 583 584 void 585 rt_maskedcopy(const struct sockaddr *src, struct sockaddr *dst, 586 const struct sockaddr *netmask) 587 { 588 const u_char *cp1 = (const u_char *)src; 589 u_char *cp2 = (u_char *)dst; 590 const u_char *cp3 = (const u_char *)netmask; 591 u_char *cplim = cp2 + *cp3; 592 u_char *cplim2 = cp2 + *cp1; 593 594 *cp2++ = *cp1++; *cp2++ = *cp1++; /* copies sa_len & sa_family */ 595 cp3 += 2; 596 if (cplim > cplim2) 597 cplim = cplim2; 598 while (cp2 < cplim) 599 *cp2++ = *cp1++ & *cp3++; 600 if (cp2 < cplim2) 601 bzero((caddr_t)cp2, (unsigned)(cplim2 - cp2)); 602 } 603 604 /* 605 * Announce interface address arrival/withdraw 606 * Returns 0 on success. 607 */ 608 int 609 rt_addrmsg(int cmd, struct ifaddr *ifa, int fibnum) 610 { 611 #if defined(INET) || defined(INET6) 612 struct sockaddr *sa = ifa->ifa_addr; 613 struct ifnet *ifp = ifa->ifa_ifp; 614 #endif 615 616 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE, 617 ("unexpected cmd %d", cmd)); 618 KASSERT((fibnum >= 0 && fibnum < rt_numfibs), 619 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs)); 620 621 EVENTHANDLER_DIRECT_INVOKE(rt_addrmsg, ifa, cmd); 622 623 #ifdef INET 624 if (sa->sa_family == AF_INET) { 625 char addrstr[INET_ADDRSTRLEN]; 626 char strbuf[INET_ADDRSTRLEN + 12]; 627 628 inet_ntoa_r(((struct sockaddr_in *)sa)->sin_addr, addrstr); 629 snprintf(strbuf, sizeof(strbuf), "address=%s", addrstr); 630 devctl_notify("IFNET", ifp->if_xname, 631 (cmd == RTM_ADD) ? "ADDR_ADD" : "ADDR_DEL", strbuf); 632 } 633 #endif 634 #ifdef INET6 635 if (sa->sa_family == AF_INET6) { 636 char addrstr[INET6_ADDRSTRLEN]; 637 char strbuf[INET6_ADDRSTRLEN + 12]; 638 639 ip6_sprintf(addrstr, IFA_IN6(ifa)); 640 snprintf(strbuf, sizeof(strbuf), "address=%s", addrstr); 641 devctl_notify("IFNET", ifp->if_xname, 642 (cmd == RTM_ADD) ? "ADDR_ADD" : "ADDR_DEL", strbuf); 643 } 644 #endif 645 646 if (V_rt_add_addr_allfibs) 647 fibnum = RT_ALL_FIBS; 648 return (rtsock_addrmsg(cmd, ifa, fibnum)); 649 } 650 651 /* 652 * Announce kernel-originated route addition/removal to rtsock based on @rt data. 653 * cmd: RTM_ cmd 654 * @rt: valid rtentry 655 * @nh: nhop object to announce 656 * @fibnum: fib id or RT_ALL_FIBS 657 * 658 * Returns 0 on success. 659 */ 660 int 661 rt_routemsg(int cmd, struct rtentry *rt, struct nhop_object *nh, 662 int fibnum) 663 { 664 665 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE || cmd == RTM_CHANGE, 666 ("unexpected cmd %d", cmd)); 667 668 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs), 669 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs)); 670 671 KASSERT(rt_key(rt) != NULL, (":%s: rt_key must be supplied", __func__)); 672 673 return (rtsock_routemsg(cmd, rt, nh, fibnum)); 674 } 675 676 /* 677 * Announce kernel-originated route addition/removal to rtsock based on @rt data. 678 * cmd: RTM_ cmd 679 * @info: addrinfo structure with valid data. 680 * @fibnum: fib id or RT_ALL_FIBS 681 * 682 * Returns 0 on success. 683 */ 684 int 685 rt_routemsg_info(int cmd, struct rt_addrinfo *info, int fibnum) 686 { 687 688 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE || cmd == RTM_CHANGE, 689 ("unexpected cmd %d", cmd)); 690 691 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs), 692 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs)); 693 694 KASSERT(info->rti_info[RTAX_DST] != NULL, (":%s: RTAX_DST must be supplied", __func__)); 695 696 return (rtsock_routemsg_info(cmd, info, fibnum)); 697 } 698 699 void 700 rt_ifmsg(struct ifnet *ifp, int if_flags_mask) 701 { 702 rtsock_callback_p->ifmsg_f(ifp, if_flags_mask); 703 netlink_callback_p->ifmsg_f(ifp, if_flags_mask); 704 } 705 706 /* Netlink-related callbacks needed to glue rtsock, netlink and linuxolator */ 707 static void 708 ignore_route_event(uint32_t fibnum, const struct rib_cmd_info *rc) 709 { 710 } 711 712 static void 713 ignore_ifmsg_event(struct ifnet *ifp, int if_flags_mask) 714 { 715 } 716 717 static struct rtbridge ignore_cb = { 718 .route_f = ignore_route_event, 719 .ifmsg_f = ignore_ifmsg_event, 720 }; 721 722 void *linux_netlink_p = NULL; /* Callback pointer for Linux translator functions */ 723 struct rtbridge *rtsock_callback_p = &ignore_cb; 724 struct rtbridge *netlink_callback_p = &ignore_cb;
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