rtsock.c revision 1.179
1 /* $NetBSD: rtsock.c,v 1.179 2016/04/05 10:03:33 ozaki-r Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * 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 project 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 PROJECT 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 PROJECT 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 32 /* 33 * Copyright (c) 1988, 1991, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: rtsock.c,v 1.179 2016/04/05 10:03:33 ozaki-r Exp $"); 65 66 #ifdef _KERNEL_OPT 67 #include "opt_inet.h" 68 #include "opt_mpls.h" 69 #include "opt_compat_netbsd.h" 70 #include "opt_sctp.h" 71 #endif 72 73 #include <sys/param.h> 74 #include <sys/systm.h> 75 #include <sys/proc.h> 76 #include <sys/socket.h> 77 #include <sys/socketvar.h> 78 #include <sys/domain.h> 79 #include <sys/protosw.h> 80 #include <sys/sysctl.h> 81 #include <sys/kauth.h> 82 #include <sys/kmem.h> 83 #include <sys/intr.h> 84 85 #include <net/if.h> 86 #include <net/if_llatbl.h> 87 #include <net/if_types.h> 88 #include <net/route.h> 89 #include <net/raw_cb.h> 90 91 #include <netinet/in_var.h> 92 #include <netinet/if_inarp.h> 93 94 #include <netmpls/mpls.h> 95 96 #ifdef SCTP 97 extern void sctp_add_ip_address(struct ifaddr *); 98 extern void sctp_delete_ip_address(struct ifaddr *); 99 #endif 100 101 #if defined(COMPAT_14) || defined(COMPAT_50) 102 #include <compat/net/if.h> 103 #include <compat/net/route.h> 104 #endif 105 #ifdef COMPAT_RTSOCK 106 #define RTM_XVERSION RTM_OVERSION 107 #define RT_XADVANCE(a,b) RT_OADVANCE(a,b) 108 #define RT_XROUNDUP(n) RT_OROUNDUP(n) 109 #define PF_XROUTE PF_OROUTE 110 #define rt_xmsghdr rt_msghdr50 111 #define if_xmsghdr if_msghdr /* if_msghdr50 is for RTM_OIFINFO */ 112 #define ifa_xmsghdr ifa_msghdr50 113 #define if_xannouncemsghdr if_announcemsghdr50 114 #define COMPATNAME(x) compat_50_ ## x 115 #define DOMAINNAME "oroute" 116 CTASSERT(sizeof(struct ifa_xmsghdr) == 20); 117 DOMAIN_DEFINE(compat_50_routedomain); /* forward declare and add to link set */ 118 #else /* COMPAT_RTSOCK */ 119 #define RTM_XVERSION RTM_VERSION 120 #define RT_XADVANCE(a,b) RT_ADVANCE(a,b) 121 #define RT_XROUNDUP(n) RT_ROUNDUP(n) 122 #define PF_XROUTE PF_ROUTE 123 #define rt_xmsghdr rt_msghdr 124 #define if_xmsghdr if_msghdr 125 #define ifa_xmsghdr ifa_msghdr 126 #define if_xannouncemsghdr if_announcemsghdr 127 #define COMPATNAME(x) x 128 #define DOMAINNAME "route" 129 CTASSERT(sizeof(struct ifa_xmsghdr) == 24); 130 #ifdef COMPAT_50 131 #define COMPATCALL(name, args) compat_50_ ## name args 132 #endif 133 DOMAIN_DEFINE(routedomain); /* forward declare and add to link set */ 134 #undef COMPAT_50 135 #undef COMPAT_14 136 #endif /* COMPAT_RTSOCK */ 137 138 #ifndef COMPATCALL 139 #define COMPATCALL(name, args) do { } while (/*CONSTCOND*/ 0) 140 #endif 141 142 #ifdef RTSOCK_DEBUG 143 #define RT_IN_PRINT(b, a) (in_print((b), sizeof(b), \ 144 &((const struct sockaddr_in *)info.rti_info[(a)])->sin_addr), (b)) 145 #endif /* RTSOCK_DEBUG */ 146 147 struct route_info COMPATNAME(route_info) = { 148 .ri_dst = { .sa_len = 2, .sa_family = PF_XROUTE, }, 149 .ri_src = { .sa_len = 2, .sa_family = PF_XROUTE, }, 150 .ri_maxqlen = IFQ_MAXLEN, 151 }; 152 153 #define PRESERVED_RTF (RTF_UP | RTF_GATEWAY | RTF_HOST | RTF_DONE | RTF_MASK) 154 155 static void COMPATNAME(route_init)(void); 156 static int COMPATNAME(route_output)(struct mbuf *, struct socket *); 157 158 static int rt_xaddrs(u_char, const char *, const char *, struct rt_addrinfo *); 159 static struct mbuf *rt_makeifannouncemsg(struct ifnet *, int, int, 160 struct rt_addrinfo *); 161 static int rt_msg2(int, struct rt_addrinfo *, void *, struct rt_walkarg *, int *); 162 static void rt_setmetrics(int, const struct rt_xmsghdr *, struct rtentry *); 163 static void rtm_setmetrics(const struct rtentry *, struct rt_xmsghdr *); 164 static void sysctl_net_route_setup(struct sysctllog **); 165 static int sysctl_dumpentry(struct rtentry *, void *); 166 static int sysctl_iflist(int, struct rt_walkarg *, int); 167 static int sysctl_rtable(SYSCTLFN_PROTO); 168 static void rt_adjustcount(int, int); 169 170 static const struct protosw COMPATNAME(route_protosw)[]; 171 172 static void 173 rt_adjustcount(int af, int cnt) 174 { 175 struct route_cb * const cb = &COMPATNAME(route_info).ri_cb; 176 177 cb->any_count += cnt; 178 179 switch (af) { 180 case AF_INET: 181 cb->ip_count += cnt; 182 return; 183 #ifdef INET6 184 case AF_INET6: 185 cb->ip6_count += cnt; 186 return; 187 #endif 188 case AF_MPLS: 189 cb->mpls_count += cnt; 190 return; 191 } 192 } 193 194 static int 195 COMPATNAME(route_attach)(struct socket *so, int proto) 196 { 197 struct rawcb *rp; 198 int s, error; 199 200 KASSERT(sotorawcb(so) == NULL); 201 rp = kmem_zalloc(sizeof(*rp), KM_SLEEP); 202 rp->rcb_len = sizeof(*rp); 203 so->so_pcb = rp; 204 205 s = splsoftnet(); 206 if ((error = raw_attach(so, proto)) == 0) { 207 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 208 rp->rcb_laddr = &COMPATNAME(route_info).ri_src; 209 rp->rcb_faddr = &COMPATNAME(route_info).ri_dst; 210 } 211 splx(s); 212 213 if (error) { 214 kmem_free(rp, sizeof(*rp)); 215 so->so_pcb = NULL; 216 return error; 217 } 218 219 soisconnected(so); 220 so->so_options |= SO_USELOOPBACK; 221 KASSERT(solocked(so)); 222 223 return error; 224 } 225 226 static void 227 COMPATNAME(route_detach)(struct socket *so) 228 { 229 struct rawcb *rp = sotorawcb(so); 230 int s; 231 232 KASSERT(rp != NULL); 233 KASSERT(solocked(so)); 234 235 s = splsoftnet(); 236 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 237 raw_detach(so); 238 splx(s); 239 } 240 241 static int 242 COMPATNAME(route_accept)(struct socket *so, struct sockaddr *nam) 243 { 244 KASSERT(solocked(so)); 245 246 panic("route_accept"); 247 248 return EOPNOTSUPP; 249 } 250 251 static int 252 COMPATNAME(route_bind)(struct socket *so, struct sockaddr *nam, struct lwp *l) 253 { 254 KASSERT(solocked(so)); 255 256 return EOPNOTSUPP; 257 } 258 259 static int 260 COMPATNAME(route_listen)(struct socket *so, struct lwp *l) 261 { 262 KASSERT(solocked(so)); 263 264 return EOPNOTSUPP; 265 } 266 267 static int 268 COMPATNAME(route_connect)(struct socket *so, struct sockaddr *nam, struct lwp *l) 269 { 270 KASSERT(solocked(so)); 271 272 return EOPNOTSUPP; 273 } 274 275 static int 276 COMPATNAME(route_connect2)(struct socket *so, struct socket *so2) 277 { 278 KASSERT(solocked(so)); 279 280 return EOPNOTSUPP; 281 } 282 283 static int 284 COMPATNAME(route_disconnect)(struct socket *so) 285 { 286 struct rawcb *rp = sotorawcb(so); 287 int s; 288 289 KASSERT(solocked(so)); 290 KASSERT(rp != NULL); 291 292 s = splsoftnet(); 293 soisdisconnected(so); 294 raw_disconnect(rp); 295 splx(s); 296 297 return 0; 298 } 299 300 static int 301 COMPATNAME(route_shutdown)(struct socket *so) 302 { 303 int s; 304 305 KASSERT(solocked(so)); 306 307 /* 308 * Mark the connection as being incapable of further input. 309 */ 310 s = splsoftnet(); 311 socantsendmore(so); 312 splx(s); 313 return 0; 314 } 315 316 static int 317 COMPATNAME(route_abort)(struct socket *so) 318 { 319 KASSERT(solocked(so)); 320 321 panic("route_abort"); 322 323 return EOPNOTSUPP; 324 } 325 326 static int 327 COMPATNAME(route_ioctl)(struct socket *so, u_long cmd, void *nam, 328 struct ifnet * ifp) 329 { 330 return EOPNOTSUPP; 331 } 332 333 static int 334 COMPATNAME(route_stat)(struct socket *so, struct stat *ub) 335 { 336 KASSERT(solocked(so)); 337 338 return 0; 339 } 340 341 static int 342 COMPATNAME(route_peeraddr)(struct socket *so, struct sockaddr *nam) 343 { 344 struct rawcb *rp = sotorawcb(so); 345 346 KASSERT(solocked(so)); 347 KASSERT(rp != NULL); 348 KASSERT(nam != NULL); 349 350 if (rp->rcb_faddr == NULL) 351 return ENOTCONN; 352 353 raw_setpeeraddr(rp, nam); 354 return 0; 355 } 356 357 static int 358 COMPATNAME(route_sockaddr)(struct socket *so, struct sockaddr *nam) 359 { 360 struct rawcb *rp = sotorawcb(so); 361 362 KASSERT(solocked(so)); 363 KASSERT(rp != NULL); 364 KASSERT(nam != NULL); 365 366 if (rp->rcb_faddr == NULL) 367 return ENOTCONN; 368 369 raw_setsockaddr(rp, nam); 370 return 0; 371 } 372 373 static int 374 COMPATNAME(route_rcvd)(struct socket *so, int flags, struct lwp *l) 375 { 376 KASSERT(solocked(so)); 377 378 return EOPNOTSUPP; 379 } 380 381 static int 382 COMPATNAME(route_recvoob)(struct socket *so, struct mbuf *m, int flags) 383 { 384 KASSERT(solocked(so)); 385 386 return EOPNOTSUPP; 387 } 388 389 static int 390 COMPATNAME(route_send)(struct socket *so, struct mbuf *m, 391 struct sockaddr *nam, struct mbuf *control, struct lwp *l) 392 { 393 int error = 0; 394 int s; 395 396 KASSERT(solocked(so)); 397 KASSERT(so->so_proto == &COMPATNAME(route_protosw)[0]); 398 399 s = splsoftnet(); 400 error = raw_send(so, m, nam, control, l, &COMPATNAME(route_output)); 401 splx(s); 402 403 return error; 404 } 405 406 static int 407 COMPATNAME(route_sendoob)(struct socket *so, struct mbuf *m, 408 struct mbuf *control) 409 { 410 KASSERT(solocked(so)); 411 412 m_freem(m); 413 m_freem(control); 414 415 return EOPNOTSUPP; 416 } 417 static int 418 COMPATNAME(route_purgeif)(struct socket *so, struct ifnet *ifp) 419 { 420 421 panic("route_purgeif"); 422 423 return EOPNOTSUPP; 424 } 425 426 #ifdef INET 427 static int 428 route_get_sdl_index(struct rt_addrinfo *info, int *sdl_index) 429 { 430 struct rtentry *nrt; 431 int error; 432 433 error = rtrequest1(RTM_GET, info, &nrt); 434 if (error != 0) 435 return error; 436 /* 437 * nrt->rt_ifp->if_index may not be correct 438 * due to changing to ifplo0. 439 */ 440 *sdl_index = satosdl(nrt->rt_gateway)->sdl_index; 441 rtfree(nrt); 442 443 return 0; 444 } 445 #endif /* INET */ 446 447 static void 448 route_get_sdl(const struct ifnet *ifp, const struct sockaddr *dst, 449 struct sockaddr_dl *sdl, int *flags) 450 { 451 struct llentry *la = NULL; 452 453 KASSERT(ifp != NULL); 454 455 memset(sdl, 0, sizeof(*sdl)); 456 sdl->sdl_family = AF_LINK; 457 sdl->sdl_len = sizeof(*sdl); 458 sdl->sdl_index = ifp->if_index; 459 sdl->sdl_type = ifp->if_type; 460 461 IF_AFDATA_RLOCK(ifp); 462 switch (dst->sa_family) { 463 case AF_INET: 464 la = lla_lookup(LLTABLE(ifp), 0, dst); 465 break; 466 case AF_INET6: 467 la = lla_lookup(LLTABLE6(ifp), 0, dst); 468 break; 469 default: 470 KASSERTMSG(0, "Invalid AF=%d\n", dst->sa_family); 471 break; 472 } 473 IF_AFDATA_RUNLOCK(ifp); 474 475 if (LLE_IS_VALID(la) && 476 (la->la_flags & LLE_VALID) == LLE_VALID) { 477 sdl->sdl_alen = ifp->if_addrlen; 478 memcpy(LLADDR(sdl), &la->ll_addr, ifp->if_addrlen); 479 } else { 480 sdl->sdl_alen = 0; 481 memset(LLADDR(sdl), 0, ifp->if_addrlen); 482 } 483 484 if (la != NULL) { 485 *flags = la->la_flags; 486 LLE_RUNLOCK(la); 487 } 488 } 489 490 /*ARGSUSED*/ 491 int 492 COMPATNAME(route_output)(struct mbuf *m, struct socket *so) 493 { 494 struct sockproto proto = { .sp_family = PF_XROUTE, }; 495 struct rt_xmsghdr *rtm = NULL; 496 struct rt_xmsghdr *old_rtm = NULL; 497 struct rtentry *rt = NULL; 498 struct rtentry *saved_nrt = NULL; 499 struct rt_addrinfo info; 500 int len, error = 0; 501 struct ifnet *ifp = NULL; 502 struct ifaddr *ifa = NULL; 503 sa_family_t family; 504 bool is_ll = false; 505 int ll_flags = 0; 506 struct sockaddr_dl sdl; 507 508 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 509 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 510 (m = m_pullup(m, sizeof(int32_t))) == NULL)) 511 return ENOBUFS; 512 if ((m->m_flags & M_PKTHDR) == 0) 513 panic("%s", __func__); 514 len = m->m_pkthdr.len; 515 if (len < sizeof(*rtm) || 516 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 517 info.rti_info[RTAX_DST] = NULL; 518 senderr(EINVAL); 519 } 520 R_Malloc(rtm, struct rt_xmsghdr *, len); 521 if (rtm == NULL) { 522 info.rti_info[RTAX_DST] = NULL; 523 senderr(ENOBUFS); 524 } 525 m_copydata(m, 0, len, rtm); 526 if (rtm->rtm_version != RTM_XVERSION) { 527 info.rti_info[RTAX_DST] = NULL; 528 senderr(EPROTONOSUPPORT); 529 } 530 rtm->rtm_pid = curproc->p_pid; 531 memset(&info, 0, sizeof(info)); 532 info.rti_addrs = rtm->rtm_addrs; 533 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 534 &info)) { 535 senderr(EINVAL); 536 } 537 info.rti_flags = rtm->rtm_flags; 538 #ifdef RTSOCK_DEBUG 539 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 540 char abuf[INET_ADDRSTRLEN]; 541 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 542 RT_IN_PRINT(abuf, RTAX_DST)); 543 } 544 #endif /* RTSOCK_DEBUG */ 545 if (info.rti_info[RTAX_DST] == NULL || 546 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 547 senderr(EINVAL); 548 } 549 if (info.rti_info[RTAX_GATEWAY] != NULL && 550 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 551 senderr(EINVAL); 552 } 553 554 /* 555 * Verify that the caller has the appropriate privilege; RTM_GET 556 * is the only operation the non-superuser is allowed. 557 */ 558 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 559 0, rtm, NULL, NULL) != 0) 560 senderr(EACCES); 561 562 switch (rtm->rtm_type) { 563 564 case RTM_ADD: 565 if (info.rti_info[RTAX_GATEWAY] == NULL) { 566 senderr(EINVAL); 567 } 568 #ifdef INET 569 /* support for new ARP code with keeping backcompat */ 570 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { 571 int sdl_index = 572 satocsdl(info.rti_info[RTAX_GATEWAY])->sdl_index; 573 574 /* 575 * Old arp binaries don't set the sdl_index 576 * so we have to complement it. 577 */ 578 if (sdl_index == 0) { 579 error = route_get_sdl_index(&info, &sdl_index); 580 if (error != 0) 581 goto fallback; 582 } else if ( 583 info.rti_info[RTAX_DST]->sa_family == AF_INET) { 584 /* 585 * XXX workaround for SIN_PROXY case; proxy arp 586 * entry should be in an interface that has 587 * a network route including the destination, 588 * not a local (link) route that may not be a 589 * desired place, for example a tap. 590 */ 591 const struct sockaddr_inarp *sina = 592 (const struct sockaddr_inarp *) 593 info.rti_info[RTAX_DST]; 594 if (sina->sin_other & SIN_PROXY) { 595 error = route_get_sdl_index(&info, 596 &sdl_index); 597 if (error != 0) 598 goto fallback; 599 } 600 } 601 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 602 rtm->rtm_rmx.rmx_expire, &info, sdl_index); 603 break; 604 } 605 fallback: 606 #endif /* INET */ 607 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 608 if (error == 0) { 609 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 610 rtfree(saved_nrt); 611 } 612 break; 613 614 case RTM_DELETE: 615 #ifdef INET 616 /* support for new ARP code */ 617 if (info.rti_info[RTAX_GATEWAY] && 618 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 619 (rtm->rtm_flags & RTF_LLDATA) != 0) { 620 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 621 rtm->rtm_rmx.rmx_expire, &info, 0); 622 break; 623 } 624 #endif /* INET */ 625 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 626 if (error == 0) { 627 rt = saved_nrt; 628 goto report; 629 } 630 break; 631 632 case RTM_GET: 633 case RTM_CHANGE: 634 case RTM_LOCK: 635 /* XXX This will mask info.rti_info[RTAX_DST] with 636 * info.rti_info[RTAX_NETMASK] before 637 * searching. It did not used to do that. --dyoung 638 */ 639 rt = NULL; 640 error = rtrequest1(RTM_GET, &info, &rt); 641 if (error != 0) 642 senderr(error); 643 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 644 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 645 info.rti_info[RTAX_DST]->sa_len) != 0) 646 senderr(ESRCH); 647 if (info.rti_info[RTAX_NETMASK] == NULL && 648 rt_mask(rt) != NULL) 649 senderr(ETOOMANYREFS); 650 } 651 652 /* 653 * XXX if arp/ndp requests an L2 entry, we have to obtain 654 * it from lltable while for the route command we have to 655 * return a route as it is. How to distinguish them? 656 * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp 657 * indicates an L2 entry is requested. For old arp/ndp 658 * binaries, we check RTF_UP flag is NOT set; it works 659 * by the fact that arp/ndp don't set it while the route 660 * command sets it. 661 */ 662 if (((rtm->rtm_flags & RTF_LLDATA) != 0 || 663 (rtm->rtm_flags & RTF_UP) == 0) && 664 rtm->rtm_type == RTM_GET && 665 sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { 666 route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, 667 &ll_flags); 668 info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); 669 is_ll = true; 670 goto skip; 671 } 672 673 switch (rtm->rtm_type) { 674 case RTM_GET: 675 report: 676 info.rti_info[RTAX_DST] = rt_getkey(rt); 677 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 678 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 679 info.rti_info[RTAX_TAG] = rt_gettag(rt); 680 skip: 681 if ((rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) == 0) 682 ; 683 else if ((ifp = rt->rt_ifp) != NULL) { 684 const struct ifaddr *rtifa; 685 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 686 /* rtifa used to be simply rt->rt_ifa. 687 * If rt->rt_ifa != NULL, then 688 * rt_get_ifa() != NULL. So this 689 * ought to still be safe. --dyoung 690 */ 691 rtifa = rt_get_ifa(rt); 692 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 693 #ifdef RTSOCK_DEBUG 694 if (info.rti_info[RTAX_IFA]->sa_family == 695 AF_INET) { 696 char ibuf[INET_ADDRSTRLEN]; 697 char abuf[INET_ADDRSTRLEN]; 698 printf("%s: copying out RTAX_IFA %s " 699 "for info.rti_info[RTAX_DST] %s " 700 "ifa_getifa %p ifa_seqno %p\n", 701 __func__, 702 RT_IN_PRINT(ibuf, RTAX_IFA), 703 RT_IN_PRINT(abuf, RTAX_DST), 704 (void *)rtifa->ifa_getifa, 705 rtifa->ifa_seqno); 706 } 707 #endif /* RTSOCK_DEBUG */ 708 if (ifp->if_flags & IFF_POINTOPOINT) { 709 info.rti_info[RTAX_BRD] = 710 rtifa->ifa_dstaddr; 711 } else 712 info.rti_info[RTAX_BRD] = NULL; 713 rtm->rtm_index = ifp->if_index; 714 } else { 715 info.rti_info[RTAX_IFP] = NULL; 716 info.rti_info[RTAX_IFA] = NULL; 717 } 718 (void)rt_msg2(rtm->rtm_type, &info, NULL, NULL, &len); 719 if (len > rtm->rtm_msglen) { 720 old_rtm = rtm; 721 R_Malloc(rtm, struct rt_xmsghdr *, len); 722 if (rtm == NULL) 723 senderr(ENOBUFS); 724 (void)memcpy(rtm, old_rtm, old_rtm->rtm_msglen); 725 } 726 (void)rt_msg2(rtm->rtm_type, &info, rtm, NULL, 0); 727 rtm->rtm_flags = rt->rt_flags; 728 rtm_setmetrics(rt, rtm); 729 rtm->rtm_addrs = info.rti_addrs; 730 if (is_ll) { 731 rtm->rtm_flags |= RTF_LLDATA; 732 rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; 733 } 734 break; 735 736 case RTM_CHANGE: 737 /* 738 * new gateway could require new ifaddr, ifp; 739 * flags may also be different; ifp may be specified 740 * by ll sockaddr when protocol address is ambiguous 741 */ 742 if ((error = rt_getifa(&info)) != 0) 743 senderr(error); 744 if (info.rti_info[RTAX_GATEWAY] && 745 rt_setgate(rt, info.rti_info[RTAX_GATEWAY])) 746 senderr(EDQUOT); 747 if (info.rti_info[RTAX_TAG]) 748 rt_settag(rt, info.rti_info[RTAX_TAG]); 749 /* new gateway could require new ifaddr, ifp; 750 flags may also be different; ifp may be specified 751 by ll sockaddr when protocol address is ambiguous */ 752 if (info.rti_info[RTAX_IFP] && 753 (ifa = ifa_ifwithnet(info.rti_info[RTAX_IFP])) && 754 (ifp = ifa->ifa_ifp) && (info.rti_info[RTAX_IFA] || 755 info.rti_info[RTAX_GATEWAY])) { 756 if (info.rti_info[RTAX_IFA] == NULL || 757 (ifa = ifa_ifwithaddr( 758 info.rti_info[RTAX_IFA])) == NULL) 759 ifa = ifaof_ifpforaddr( 760 info.rti_info[RTAX_IFA] ? 761 info.rti_info[RTAX_IFA] : 762 info.rti_info[RTAX_GATEWAY], ifp); 763 } else if ((info.rti_info[RTAX_IFA] && 764 (ifa = ifa_ifwithaddr(info.rti_info[RTAX_IFA]))) || 765 (info.rti_info[RTAX_GATEWAY] && 766 (ifa = ifa_ifwithroute(rt->rt_flags, 767 rt_getkey(rt), info.rti_info[RTAX_GATEWAY])))) { 768 ifp = ifa->ifa_ifp; 769 } 770 if (ifa) { 771 struct ifaddr *oifa = rt->rt_ifa; 772 if (oifa != ifa) { 773 if (oifa && oifa->ifa_rtrequest) { 774 oifa->ifa_rtrequest(RTM_DELETE, 775 rt, &info); 776 } 777 rt_replace_ifa(rt, ifa); 778 rt->rt_ifp = ifp; 779 } 780 } 781 if (ifp && rt->rt_ifp != ifp) 782 rt->rt_ifp = ifp; 783 rt_setmetrics(rtm->rtm_inits, rtm, rt); 784 if (rt->rt_flags != info.rti_flags) 785 rt->rt_flags = (info.rti_flags & ~PRESERVED_RTF) 786 | (rt->rt_flags & PRESERVED_RTF); 787 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 788 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 789 /*FALLTHROUGH*/ 790 case RTM_LOCK: 791 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 792 rt->rt_rmx.rmx_locks |= 793 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 794 break; 795 } 796 break; 797 798 default: 799 senderr(EOPNOTSUPP); 800 } 801 802 flush: 803 if (rtm) { 804 if (error) 805 rtm->rtm_errno = error; 806 else 807 rtm->rtm_flags |= RTF_DONE; 808 } 809 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 810 0; 811 /* We cannot free old_rtm until we have stopped using the 812 * pointers in info, some of which may point to sockaddrs 813 * in old_rtm. 814 */ 815 if (old_rtm != NULL) 816 Free(old_rtm); 817 if (rt) 818 rtfree(rt); 819 { 820 struct rawcb *rp = NULL; 821 /* 822 * Check to see if we don't want our own messages. 823 */ 824 if ((so->so_options & SO_USELOOPBACK) == 0) { 825 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 826 if (rtm) 827 Free(rtm); 828 m_freem(m); 829 return error; 830 } 831 /* There is another listener, so construct message */ 832 rp = sotorawcb(so); 833 } 834 if (rtm) { 835 m_copyback(m, 0, rtm->rtm_msglen, rtm); 836 if (m->m_pkthdr.len < rtm->rtm_msglen) { 837 m_freem(m); 838 m = NULL; 839 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 840 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 841 Free(rtm); 842 } 843 if (rp) 844 rp->rcb_proto.sp_family = 0; /* Avoid us */ 845 if (family) 846 proto.sp_protocol = family; 847 if (m) 848 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 849 &COMPATNAME(route_info).ri_dst); 850 if (rp) 851 rp->rcb_proto.sp_family = PF_XROUTE; 852 } 853 return error; 854 } 855 856 static void 857 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 858 { 859 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 860 metric(RTV_RPIPE, rmx_recvpipe); 861 metric(RTV_SPIPE, rmx_sendpipe); 862 metric(RTV_SSTHRESH, rmx_ssthresh); 863 metric(RTV_RTT, rmx_rtt); 864 metric(RTV_RTTVAR, rmx_rttvar); 865 metric(RTV_HOPCOUNT, rmx_hopcount); 866 metric(RTV_MTU, rmx_mtu); 867 #undef metric 868 if (which & RTV_EXPIRE) { 869 out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? 870 time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; 871 } 872 } 873 874 static void 875 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 876 { 877 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 878 metric(rmx_recvpipe); 879 metric(rmx_sendpipe); 880 metric(rmx_ssthresh); 881 metric(rmx_rtt); 882 metric(rmx_rttvar); 883 metric(rmx_hopcount); 884 metric(rmx_mtu); 885 #undef metric 886 out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? 887 time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; 888 } 889 890 static int 891 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 892 struct rt_addrinfo *rtinfo) 893 { 894 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 895 int i; 896 897 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 898 if ((rtinfo->rti_addrs & (1 << i)) == 0) 899 continue; 900 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 901 RT_XADVANCE(cp, sa); 902 } 903 904 /* 905 * Check for extra addresses specified, except RTM_GET asking 906 * for interface info. 907 */ 908 if (rtmtype == RTM_GET) { 909 if (((rtinfo->rti_addrs & 910 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0 << i)) != 0) 911 return 1; 912 } else if ((rtinfo->rti_addrs & (~0 << i)) != 0) 913 return 1; 914 /* Check for bad data length. */ 915 if (cp != cplim) { 916 if (i == RTAX_NETMASK + 1 && sa != NULL && 917 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 918 /* 919 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 920 * We accept this for now for the sake of old 921 * binaries or third party softwares. 922 */ 923 ; 924 else 925 return 1; 926 } 927 return 0; 928 } 929 930 static int 931 rt_getlen(int type) 932 { 933 #ifndef COMPAT_RTSOCK 934 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 935 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 936 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 937 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 938 #endif 939 940 switch (type) { 941 case RTM_DELADDR: 942 case RTM_NEWADDR: 943 case RTM_CHGADDR: 944 return sizeof(struct ifa_xmsghdr); 945 946 case RTM_OOIFINFO: 947 #ifdef COMPAT_14 948 return sizeof(struct if_msghdr14); 949 #else 950 #ifdef DIAGNOSTIC 951 printf("RTM_OOIFINFO\n"); 952 #endif 953 return -1; 954 #endif 955 case RTM_OIFINFO: 956 #ifdef COMPAT_50 957 return sizeof(struct if_msghdr50); 958 #else 959 #ifdef DIAGNOSTIC 960 printf("RTM_OIFINFO\n"); 961 #endif 962 return -1; 963 #endif 964 965 case RTM_IFINFO: 966 return sizeof(struct if_xmsghdr); 967 968 case RTM_IFANNOUNCE: 969 case RTM_IEEE80211: 970 return sizeof(struct if_xannouncemsghdr); 971 972 default: 973 return sizeof(struct rt_xmsghdr); 974 } 975 } 976 977 978 struct mbuf * 979 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 980 { 981 struct rt_xmsghdr *rtm; 982 struct mbuf *m; 983 int i; 984 const struct sockaddr *sa; 985 int len, dlen; 986 987 m = m_gethdr(M_DONTWAIT, MT_DATA); 988 if (m == NULL) 989 return m; 990 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 991 992 if ((len = rt_getlen(type)) == -1) 993 goto out; 994 if (len > MHLEN + MLEN) 995 panic("%s: message too long", __func__); 996 else if (len > MHLEN) { 997 m->m_next = m_get(M_DONTWAIT, MT_DATA); 998 if (m->m_next == NULL) 999 goto out; 1000 MCLAIM(m->m_next, m->m_owner); 1001 m->m_pkthdr.len = len; 1002 m->m_len = MHLEN; 1003 m->m_next->m_len = len - MHLEN; 1004 } else { 1005 m->m_pkthdr.len = m->m_len = len; 1006 } 1007 m->m_pkthdr.rcvif = NULL; 1008 m_copyback(m, 0, datalen, data); 1009 if (len > datalen) 1010 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 1011 rtm = mtod(m, struct rt_xmsghdr *); 1012 for (i = 0; i < RTAX_MAX; i++) { 1013 if ((sa = rtinfo->rti_info[i]) == NULL) 1014 continue; 1015 rtinfo->rti_addrs |= (1 << i); 1016 dlen = RT_XROUNDUP(sa->sa_len); 1017 m_copyback(m, len, sa->sa_len, sa); 1018 if (dlen != sa->sa_len) { 1019 /* 1020 * Up to 6 + 1 nul's since roundup is to 1021 * sizeof(uint64_t) (8 bytes) 1022 */ 1023 m_copyback(m, len + sa->sa_len, 1024 dlen - sa->sa_len, "\0\0\0\0\0\0"); 1025 } 1026 len += dlen; 1027 } 1028 if (m->m_pkthdr.len != len) 1029 goto out; 1030 rtm->rtm_msglen = len; 1031 rtm->rtm_version = RTM_XVERSION; 1032 rtm->rtm_type = type; 1033 return m; 1034 out: 1035 m_freem(m); 1036 return NULL; 1037 } 1038 1039 /* 1040 * rt_msg2 1041 * 1042 * fills 'cp' or 'w'.w_tmem with the routing socket message and 1043 * returns the length of the message in 'lenp'. 1044 * 1045 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 1046 * the message 1047 * otherwise walkarg's w_needed is updated and if the user buffer is 1048 * specified and w_needed indicates space exists the information is copied 1049 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 1050 * if the allocation fails ENOBUFS is returned. 1051 */ 1052 static int 1053 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1054 int *lenp) 1055 { 1056 int i; 1057 int len, dlen, second_time = 0; 1058 char *cp0, *cp = cpv; 1059 1060 rtinfo->rti_addrs = 0; 1061 again: 1062 if ((len = rt_getlen(type)) == -1) 1063 return EINVAL; 1064 1065 if ((cp0 = cp) != NULL) 1066 cp += len; 1067 for (i = 0; i < RTAX_MAX; i++) { 1068 const struct sockaddr *sa; 1069 1070 if ((sa = rtinfo->rti_info[i]) == NULL) 1071 continue; 1072 rtinfo->rti_addrs |= (1 << i); 1073 dlen = RT_XROUNDUP(sa->sa_len); 1074 if (cp) { 1075 int diff = dlen - sa->sa_len; 1076 (void)memcpy(cp, sa, (size_t)sa->sa_len); 1077 cp += sa->sa_len; 1078 if (diff > 0) { 1079 (void)memset(cp, 0, (size_t)diff); 1080 cp += diff; 1081 } 1082 } 1083 len += dlen; 1084 } 1085 if (cp == NULL && w != NULL && !second_time) { 1086 struct rt_walkarg *rw = w; 1087 1088 rw->w_needed += len; 1089 if (rw->w_needed <= 0 && rw->w_where) { 1090 if (rw->w_tmemsize < len) { 1091 if (rw->w_tmem) 1092 free(rw->w_tmem, M_RTABLE); 1093 rw->w_tmem = malloc(len, M_RTABLE, M_NOWAIT); 1094 if (rw->w_tmem) 1095 rw->w_tmemsize = len; 1096 else 1097 rw->w_tmemsize = 0; 1098 } 1099 if (rw->w_tmem) { 1100 cp = rw->w_tmem; 1101 second_time = 1; 1102 goto again; 1103 } else { 1104 rw->w_tmemneeded = len; 1105 return ENOBUFS; 1106 } 1107 } 1108 } 1109 if (cp) { 1110 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 1111 1112 rtm->rtm_version = RTM_XVERSION; 1113 rtm->rtm_type = type; 1114 rtm->rtm_msglen = len; 1115 } 1116 if (lenp) 1117 *lenp = len; 1118 return 0; 1119 } 1120 1121 #ifndef COMPAT_RTSOCK 1122 int 1123 rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1124 int *lenp) 1125 { 1126 return rt_msg2(type, rtinfo, cpv, w, lenp); 1127 } 1128 #endif 1129 1130 /* 1131 * This routine is called to generate a message from the routing 1132 * socket indicating that a redirect has occurred, a routing lookup 1133 * has failed, or that a protocol has detected timeouts to a particular 1134 * destination. 1135 */ 1136 void 1137 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 1138 int error) 1139 { 1140 struct rt_xmsghdr rtm; 1141 struct mbuf *m; 1142 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1143 struct rt_addrinfo info = *rtinfo; 1144 1145 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 1146 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1147 return; 1148 memset(&rtm, 0, sizeof(rtm)); 1149 rtm.rtm_flags = RTF_DONE | flags; 1150 rtm.rtm_errno = error; 1151 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 1152 if (m == NULL) 1153 return; 1154 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1155 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1156 } 1157 1158 /* 1159 * This routine is called to generate a message from the routing 1160 * socket indicating that the status of a network interface has changed. 1161 */ 1162 void 1163 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1164 { 1165 struct if_xmsghdr ifm; 1166 struct mbuf *m; 1167 struct rt_addrinfo info; 1168 1169 COMPATCALL(rt_ifmsg, (ifp)); 1170 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1171 return; 1172 (void)memset(&info, 0, sizeof(info)); 1173 (void)memset(&ifm, 0, sizeof(ifm)); 1174 ifm.ifm_index = ifp->if_index; 1175 ifm.ifm_flags = ifp->if_flags; 1176 ifm.ifm_data = ifp->if_data; 1177 ifm.ifm_addrs = 0; 1178 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1179 if (m == NULL) 1180 return; 1181 COMPATNAME(route_enqueue)(m, 0); 1182 #ifdef COMPAT_14 1183 compat_14_rt_oifmsg(ifp); 1184 #endif 1185 #ifdef COMPAT_50 1186 compat_50_rt_oifmsg(ifp); 1187 #endif 1188 } 1189 1190 1191 /* 1192 * This is called to generate messages from the routing socket 1193 * indicating a network interface has had addresses associated with it. 1194 * if we ever reverse the logic and replace messages TO the routing 1195 * socket indicate a request to configure interfaces, then it will 1196 * be unnecessary as the routing socket will automatically generate 1197 * copies of it. 1198 */ 1199 void 1200 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1201 struct rtentry *rt) 1202 { 1203 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1204 struct rt_addrinfo info; 1205 const struct sockaddr *sa; 1206 int pass; 1207 struct mbuf *m; 1208 struct ifnet *ifp; 1209 struct rt_xmsghdr rtm; 1210 struct ifa_xmsghdr ifam; 1211 int ncmd; 1212 1213 KASSERT(ifa != NULL); 1214 ifp = ifa->ifa_ifp; 1215 #ifdef SCTP 1216 if (cmd == RTM_ADD) { 1217 sctp_add_ip_address(ifa); 1218 } else if (cmd == RTM_DELETE) { 1219 sctp_delete_ip_address(ifa); 1220 } 1221 #endif 1222 1223 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1224 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1225 return; 1226 for (pass = 1; pass < 3; pass++) { 1227 memset(&info, 0, sizeof(info)); 1228 switch (cmdpass(cmd, pass)) { 1229 case cmdpass(RTM_ADD, 1): 1230 case cmdpass(RTM_CHANGE, 1): 1231 case cmdpass(RTM_DELETE, 2): 1232 case cmdpass(RTM_NEWADDR, 1): 1233 case cmdpass(RTM_DELADDR, 1): 1234 case cmdpass(RTM_CHGADDR, 1): 1235 switch (cmd) { 1236 case RTM_ADD: 1237 ncmd = RTM_NEWADDR; 1238 break; 1239 case RTM_DELETE: 1240 ncmd = RTM_DELADDR; 1241 break; 1242 case RTM_CHANGE: 1243 ncmd = RTM_CHGADDR; 1244 break; 1245 default: 1246 ncmd = cmd; 1247 } 1248 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1249 KASSERT(ifp->if_dl != NULL); 1250 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1251 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1252 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1253 memset(&ifam, 0, sizeof(ifam)); 1254 ifam.ifam_index = ifp->if_index; 1255 ifam.ifam_metric = ifa->ifa_metric; 1256 ifam.ifam_flags = ifa->ifa_flags; 1257 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1258 if (m == NULL) 1259 continue; 1260 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1261 info.rti_addrs; 1262 break; 1263 case cmdpass(RTM_ADD, 2): 1264 case cmdpass(RTM_CHANGE, 2): 1265 case cmdpass(RTM_DELETE, 1): 1266 if (rt == NULL) 1267 continue; 1268 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1269 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1270 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1271 memset(&rtm, 0, sizeof(rtm)); 1272 rtm.rtm_index = ifp->if_index; 1273 rtm.rtm_flags |= rt->rt_flags; 1274 rtm.rtm_errno = error; 1275 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1276 if (m == NULL) 1277 continue; 1278 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1279 break; 1280 default: 1281 continue; 1282 } 1283 #ifdef DIAGNOSTIC 1284 if (m == NULL) 1285 panic("%s: called with wrong command", __func__); 1286 #endif 1287 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1288 } 1289 #undef cmdpass 1290 } 1291 1292 static struct mbuf * 1293 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1294 struct rt_addrinfo *info) 1295 { 1296 struct if_xannouncemsghdr ifan; 1297 1298 memset(info, 0, sizeof(*info)); 1299 memset(&ifan, 0, sizeof(ifan)); 1300 ifan.ifan_index = ifp->if_index; 1301 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1302 ifan.ifan_what = what; 1303 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1304 } 1305 1306 /* 1307 * This is called to generate routing socket messages indicating 1308 * network interface arrival and departure. 1309 */ 1310 void 1311 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1312 { 1313 struct mbuf *m; 1314 struct rt_addrinfo info; 1315 1316 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1317 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1318 return; 1319 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1320 if (m == NULL) 1321 return; 1322 COMPATNAME(route_enqueue)(m, 0); 1323 } 1324 1325 /* 1326 * This is called to generate routing socket messages indicating 1327 * IEEE80211 wireless events. 1328 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1329 */ 1330 void 1331 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1332 size_t data_len) 1333 { 1334 struct mbuf *m; 1335 struct rt_addrinfo info; 1336 1337 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1338 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1339 return; 1340 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1341 if (m == NULL) 1342 return; 1343 /* 1344 * Append the ieee80211 data. Try to stick it in the 1345 * mbuf containing the ifannounce msg; otherwise allocate 1346 * a new mbuf and append. 1347 * 1348 * NB: we assume m is a single mbuf. 1349 */ 1350 if (data_len > M_TRAILINGSPACE(m)) { 1351 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1352 if (n == NULL) { 1353 m_freem(m); 1354 return; 1355 } 1356 (void)memcpy(mtod(n, void *), data, data_len); 1357 n->m_len = data_len; 1358 m->m_next = n; 1359 } else if (data_len > 0) { 1360 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1361 m->m_len += data_len; 1362 } 1363 if (m->m_flags & M_PKTHDR) 1364 m->m_pkthdr.len += data_len; 1365 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1366 COMPATNAME(route_enqueue)(m, 0); 1367 } 1368 1369 /* 1370 * This is used in dumping the kernel table via sysctl(). 1371 */ 1372 static int 1373 sysctl_dumpentry(struct rtentry *rt, void *v) 1374 { 1375 struct rt_walkarg *w = v; 1376 int error = 0, size; 1377 struct rt_addrinfo info; 1378 1379 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1380 return 0; 1381 memset(&info, 0, sizeof(info)); 1382 info.rti_info[RTAX_DST] = rt_getkey(rt); 1383 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1384 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1385 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1386 if (rt->rt_ifp) { 1387 const struct ifaddr *rtifa; 1388 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1389 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1390 * then rt_get_ifa() != NULL. So this ought to still be safe. 1391 * --dyoung 1392 */ 1393 rtifa = rt_get_ifa(rt); 1394 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1395 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1396 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1397 } 1398 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1399 return error; 1400 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1401 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1402 1403 rtm->rtm_flags = rt->rt_flags; 1404 rtm->rtm_use = rt->rt_use; 1405 rtm_setmetrics(rt, rtm); 1406 KASSERT(rt->rt_ifp != NULL); 1407 rtm->rtm_index = rt->rt_ifp->if_index; 1408 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1409 rtm->rtm_addrs = info.rti_addrs; 1410 if ((error = copyout(rtm, w->w_where, size)) != 0) 1411 w->w_where = NULL; 1412 else 1413 w->w_where = (char *)w->w_where + size; 1414 } 1415 return error; 1416 } 1417 1418 static int 1419 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1420 { 1421 struct ifnet *ifp; 1422 struct ifaddr *ifa; 1423 struct rt_addrinfo info; 1424 int len, error = 0; 1425 1426 memset(&info, 0, sizeof(info)); 1427 IFNET_FOREACH(ifp) { 1428 if (w->w_arg && w->w_arg != ifp->if_index) 1429 continue; 1430 if (IFADDR_EMPTY(ifp)) 1431 continue; 1432 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1433 switch (type) { 1434 case NET_RT_IFLIST: 1435 error = rt_msg2(RTM_IFINFO, &info, NULL, w, &len); 1436 break; 1437 #ifdef COMPAT_14 1438 case NET_RT_OOIFLIST: 1439 error = rt_msg2(RTM_OOIFINFO, &info, NULL, w, &len); 1440 break; 1441 #endif 1442 #ifdef COMPAT_50 1443 case NET_RT_OIFLIST: 1444 error = rt_msg2(RTM_OIFINFO, &info, NULL, w, &len); 1445 break; 1446 #endif 1447 default: 1448 panic("sysctl_iflist(1)"); 1449 } 1450 if (error) 1451 return error; 1452 info.rti_info[RTAX_IFP] = NULL; 1453 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1454 switch (type) { 1455 case NET_RT_IFLIST: { 1456 struct if_xmsghdr *ifm; 1457 1458 ifm = (struct if_xmsghdr *)w->w_tmem; 1459 ifm->ifm_index = ifp->if_index; 1460 ifm->ifm_flags = ifp->if_flags; 1461 ifm->ifm_data = ifp->if_data; 1462 ifm->ifm_addrs = info.rti_addrs; 1463 error = copyout(ifm, w->w_where, len); 1464 if (error) 1465 return error; 1466 w->w_where = (char *)w->w_where + len; 1467 break; 1468 } 1469 1470 #ifdef COMPAT_14 1471 case NET_RT_OOIFLIST: 1472 error = compat_14_iflist(ifp, w, &info, len); 1473 if (error) 1474 return error; 1475 break; 1476 #endif 1477 #ifdef COMPAT_50 1478 case NET_RT_OIFLIST: 1479 error = compat_50_iflist(ifp, w, &info, len); 1480 if (error) 1481 return error; 1482 break; 1483 #endif 1484 default: 1485 panic("sysctl_iflist(2)"); 1486 } 1487 } 1488 IFADDR_FOREACH(ifa, ifp) { 1489 if (af && af != ifa->ifa_addr->sa_family) 1490 continue; 1491 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1492 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1493 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1494 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 1495 return error; 1496 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1497 struct ifa_xmsghdr *ifam; 1498 1499 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1500 ifam->ifam_index = ifa->ifa_ifp->if_index; 1501 ifam->ifam_flags = ifa->ifa_flags; 1502 ifam->ifam_metric = ifa->ifa_metric; 1503 ifam->ifam_addrs = info.rti_addrs; 1504 error = copyout(w->w_tmem, w->w_where, len); 1505 if (error) 1506 return error; 1507 w->w_where = (char *)w->w_where + len; 1508 } 1509 } 1510 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1511 info.rti_info[RTAX_BRD] = NULL; 1512 } 1513 return 0; 1514 } 1515 1516 static int 1517 sysctl_rtable(SYSCTLFN_ARGS) 1518 { 1519 void *where = oldp; 1520 size_t *given = oldlenp; 1521 int i, s, error = EINVAL; 1522 u_char af; 1523 struct rt_walkarg w; 1524 1525 if (namelen == 1 && name[0] == CTL_QUERY) 1526 return sysctl_query(SYSCTLFN_CALL(rnode)); 1527 1528 if (newp) 1529 return EPERM; 1530 if (namelen != 3) 1531 return EINVAL; 1532 af = name[0]; 1533 w.w_tmemneeded = 0; 1534 w.w_tmemsize = 0; 1535 w.w_tmem = NULL; 1536 again: 1537 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1538 if (w.w_tmemneeded) { 1539 w.w_tmem = malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1540 w.w_tmemsize = w.w_tmemneeded; 1541 w.w_tmemneeded = 0; 1542 } 1543 w.w_op = name[1]; 1544 w.w_arg = name[2]; 1545 w.w_given = *given; 1546 w.w_needed = 0 - w.w_given; 1547 w.w_where = where; 1548 1549 s = splsoftnet(); 1550 switch (w.w_op) { 1551 1552 case NET_RT_DUMP: 1553 case NET_RT_FLAGS: 1554 #ifdef INET 1555 /* 1556 * take care of llinfo entries, the caller must 1557 * specify an AF 1558 */ 1559 if (w.w_op == NET_RT_FLAGS && 1560 (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { 1561 if (af != 0) 1562 error = lltable_sysctl_dumparp(af, &w); 1563 else 1564 error = EINVAL; 1565 break; 1566 } 1567 #endif /* INET */ 1568 1569 for (i = 1; i <= AF_MAX; i++) 1570 if ((af == 0 || af == i) && 1571 (error = rt_walktree(i, sysctl_dumpentry, &w))) 1572 break; 1573 break; 1574 1575 #ifdef COMPAT_14 1576 case NET_RT_OOIFLIST: 1577 error = sysctl_iflist(af, &w, w.w_op); 1578 break; 1579 #endif 1580 #ifdef COMPAT_50 1581 case NET_RT_OIFLIST: 1582 error = sysctl_iflist(af, &w, w.w_op); 1583 break; 1584 #endif 1585 case NET_RT_IFLIST: 1586 error = sysctl_iflist(af, &w, w.w_op); 1587 break; 1588 } 1589 splx(s); 1590 1591 /* check to see if we couldn't allocate memory with NOWAIT */ 1592 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1593 goto again; 1594 1595 if (w.w_tmem) 1596 free(w.w_tmem, M_RTABLE); 1597 w.w_needed += w.w_given; 1598 if (where) { 1599 *given = (char *)w.w_where - (char *)where; 1600 if (*given < w.w_needed) 1601 return ENOMEM; 1602 } else { 1603 *given = (11 * w.w_needed) / 10; 1604 } 1605 return error; 1606 } 1607 1608 /* 1609 * Routing message software interrupt routine 1610 */ 1611 static void 1612 COMPATNAME(route_intr)(void *cookie) 1613 { 1614 struct sockproto proto = { .sp_family = PF_XROUTE, }; 1615 struct route_info * const ri = &COMPATNAME(route_info); 1616 struct mbuf *m; 1617 int s; 1618 1619 mutex_enter(softnet_lock); 1620 KERNEL_LOCK(1, NULL); 1621 while (!IF_IS_EMPTY(&ri->ri_intrq)) { 1622 s = splnet(); 1623 IF_DEQUEUE(&ri->ri_intrq, m); 1624 splx(s); 1625 if (m == NULL) 1626 break; 1627 proto.sp_protocol = M_GETCTX(m, uintptr_t); 1628 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); 1629 } 1630 KERNEL_UNLOCK_ONE(NULL); 1631 mutex_exit(softnet_lock); 1632 } 1633 1634 /* 1635 * Enqueue a message to the software interrupt routine. 1636 */ 1637 void 1638 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 1639 { 1640 struct route_info * const ri = &COMPATNAME(route_info); 1641 int s, wasempty; 1642 1643 s = splnet(); 1644 if (IF_QFULL(&ri->ri_intrq)) { 1645 IF_DROP(&ri->ri_intrq); 1646 m_freem(m); 1647 } else { 1648 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 1649 M_SETCTX(m, (uintptr_t)family); 1650 IF_ENQUEUE(&ri->ri_intrq, m); 1651 if (wasempty) 1652 softint_schedule(ri->ri_sih); 1653 } 1654 splx(s); 1655 } 1656 1657 static void 1658 COMPATNAME(route_init)(void) 1659 { 1660 struct route_info * const ri = &COMPATNAME(route_info); 1661 1662 #ifndef COMPAT_RTSOCK 1663 rt_init(); 1664 #endif 1665 1666 sysctl_net_route_setup(NULL); 1667 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 1668 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 1669 COMPATNAME(route_intr), NULL); 1670 } 1671 1672 /* 1673 * Definitions of protocols supported in the ROUTE domain. 1674 */ 1675 #ifndef COMPAT_RTSOCK 1676 PR_WRAP_USRREQS(route); 1677 #else 1678 PR_WRAP_USRREQS(compat_50_route); 1679 #endif 1680 1681 static const struct pr_usrreqs route_usrreqs = { 1682 .pr_attach = COMPATNAME(route_attach_wrapper), 1683 .pr_detach = COMPATNAME(route_detach_wrapper), 1684 .pr_accept = COMPATNAME(route_accept_wrapper), 1685 .pr_bind = COMPATNAME(route_bind_wrapper), 1686 .pr_listen = COMPATNAME(route_listen_wrapper), 1687 .pr_connect = COMPATNAME(route_connect_wrapper), 1688 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 1689 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 1690 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 1691 .pr_abort = COMPATNAME(route_abort_wrapper), 1692 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 1693 .pr_stat = COMPATNAME(route_stat_wrapper), 1694 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 1695 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 1696 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 1697 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 1698 .pr_send = COMPATNAME(route_send_wrapper), 1699 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 1700 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 1701 }; 1702 1703 static const struct protosw COMPATNAME(route_protosw)[] = { 1704 { 1705 .pr_type = SOCK_RAW, 1706 .pr_domain = &COMPATNAME(routedomain), 1707 .pr_flags = PR_ATOMIC|PR_ADDR, 1708 .pr_input = raw_input, 1709 .pr_ctlinput = raw_ctlinput, 1710 .pr_usrreqs = &route_usrreqs, 1711 .pr_init = raw_init, 1712 }, 1713 }; 1714 1715 struct domain COMPATNAME(routedomain) = { 1716 .dom_family = PF_XROUTE, 1717 .dom_name = DOMAINNAME, 1718 .dom_init = COMPATNAME(route_init), 1719 .dom_protosw = COMPATNAME(route_protosw), 1720 .dom_protoswNPROTOSW = 1721 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 1722 }; 1723 1724 static void 1725 sysctl_net_route_setup(struct sysctllog **clog) 1726 { 1727 const struct sysctlnode *rnode = NULL; 1728 1729 sysctl_createv(clog, 0, NULL, &rnode, 1730 CTLFLAG_PERMANENT, 1731 CTLTYPE_NODE, DOMAINNAME, 1732 SYSCTL_DESCR("PF_ROUTE information"), 1733 NULL, 0, NULL, 0, 1734 CTL_NET, PF_XROUTE, CTL_EOL); 1735 1736 sysctl_createv(clog, 0, NULL, NULL, 1737 CTLFLAG_PERMANENT, 1738 CTLTYPE_NODE, "rtable", 1739 SYSCTL_DESCR("Routing table information"), 1740 sysctl_rtable, 0, NULL, 0, 1741 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 1742 1743 sysctl_createv(clog, 0, &rnode, NULL, 1744 CTLFLAG_PERMANENT, 1745 CTLTYPE_STRUCT, "stats", 1746 SYSCTL_DESCR("Routing statistics"), 1747 NULL, 0, &rtstat, sizeof(rtstat), 1748 CTL_CREATE, CTL_EOL); 1749 } 1750
Indexes created Sat Sep 27 21:09:56 GMT 2025