rtsock.c revision 1.186
1 /* $NetBSD: rtsock.c,v 1.186 2016/05/12 02:24:16 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 1.186 2016/05/12 02:24:16 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; 452 453 KASSERT(ifp != NULL); 454 455 IF_AFDATA_RLOCK(ifp); 456 switch (dst->sa_family) { 457 case AF_INET: 458 la = lla_lookup(LLTABLE(ifp), 0, dst); 459 break; 460 case AF_INET6: 461 la = lla_lookup(LLTABLE6(ifp), 0, dst); 462 break; 463 default: 464 la = NULL; 465 KASSERTMSG(0, "Invalid AF=%d\n", dst->sa_family); 466 break; 467 } 468 IF_AFDATA_RUNLOCK(ifp); 469 470 void *a = (LLE_IS_VALID(la) && (la->la_flags & LLE_VALID) == LLE_VALID) 471 ? &la->ll_addr : NULL; 472 473 a = sockaddr_dl_init(sdl, sizeof(*sdl), ifp->if_index, ifp->if_type, 474 NULL, 0, a, ifp->if_addrlen); 475 KASSERT(a != NULL); 476 477 if (la != NULL) { 478 *flags = la->la_flags; 479 LLE_RUNLOCK(la); 480 } 481 } 482 483 /*ARGSUSED*/ 484 int 485 COMPATNAME(route_output)(struct mbuf *m, struct socket *so) 486 { 487 struct sockproto proto = { .sp_family = PF_XROUTE, }; 488 struct rt_xmsghdr *rtm = NULL; 489 struct rt_xmsghdr *old_rtm = NULL; 490 struct rtentry *rt = NULL; 491 struct rtentry *saved_nrt = NULL; 492 struct rt_addrinfo info; 493 int len, error = 0; 494 struct ifnet *ifp = NULL; 495 struct ifaddr *ifa = NULL; 496 sa_family_t family; 497 bool is_ll = false; 498 int ll_flags = 0; 499 struct sockaddr_dl sdl; 500 501 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 502 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 503 (m = m_pullup(m, sizeof(int32_t))) == NULL)) 504 return ENOBUFS; 505 if ((m->m_flags & M_PKTHDR) == 0) 506 panic("%s", __func__); 507 len = m->m_pkthdr.len; 508 if (len < sizeof(*rtm) || 509 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 510 info.rti_info[RTAX_DST] = NULL; 511 senderr(EINVAL); 512 } 513 R_Malloc(rtm, struct rt_xmsghdr *, len); 514 if (rtm == NULL) { 515 info.rti_info[RTAX_DST] = NULL; 516 senderr(ENOBUFS); 517 } 518 m_copydata(m, 0, len, rtm); 519 if (rtm->rtm_version != RTM_XVERSION) { 520 info.rti_info[RTAX_DST] = NULL; 521 senderr(EPROTONOSUPPORT); 522 } 523 rtm->rtm_pid = curproc->p_pid; 524 memset(&info, 0, sizeof(info)); 525 info.rti_addrs = rtm->rtm_addrs; 526 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 527 &info)) { 528 senderr(EINVAL); 529 } 530 info.rti_flags = rtm->rtm_flags; 531 #ifdef RTSOCK_DEBUG 532 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 533 char abuf[INET_ADDRSTRLEN]; 534 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 535 RT_IN_PRINT(abuf, RTAX_DST)); 536 } 537 #endif /* RTSOCK_DEBUG */ 538 if (info.rti_info[RTAX_DST] == NULL || 539 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 540 senderr(EINVAL); 541 } 542 if (info.rti_info[RTAX_GATEWAY] != NULL && 543 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 544 senderr(EINVAL); 545 } 546 547 /* 548 * Verify that the caller has the appropriate privilege; RTM_GET 549 * is the only operation the non-superuser is allowed. 550 */ 551 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 552 0, rtm, NULL, NULL) != 0) 553 senderr(EACCES); 554 555 switch (rtm->rtm_type) { 556 557 case RTM_ADD: 558 if (info.rti_info[RTAX_GATEWAY] == NULL) { 559 senderr(EINVAL); 560 } 561 #ifdef INET 562 /* support for new ARP code with keeping backcompat */ 563 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { 564 const struct sockaddr_dl *sdlp = 565 satocsdl(info.rti_info[RTAX_GATEWAY]); 566 567 /* Allow routing requests by interface index */ 568 if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 569 && sdlp->sdl_slen == 0) 570 goto fallback; 571 /* 572 * Old arp binaries don't set the sdl_index 573 * so we have to complement it. 574 */ 575 int sdl_index = sdlp->sdl_index; 576 if (sdl_index == 0) { 577 error = route_get_sdl_index(&info, &sdl_index); 578 if (error != 0) 579 goto fallback; 580 } else if ( 581 info.rti_info[RTAX_DST]->sa_family == AF_INET) { 582 /* 583 * XXX workaround for SIN_PROXY case; proxy arp 584 * entry should be in an interface that has 585 * a network route including the destination, 586 * not a local (link) route that may not be a 587 * desired place, for example a tap. 588 */ 589 const struct sockaddr_inarp *sina = 590 (const struct sockaddr_inarp *) 591 info.rti_info[RTAX_DST]; 592 if (sina->sin_other & SIN_PROXY) { 593 error = route_get_sdl_index(&info, 594 &sdl_index); 595 if (error != 0) 596 goto fallback; 597 } 598 } 599 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 600 rtm->rtm_rmx.rmx_expire, &info, sdl_index); 601 break; 602 } 603 fallback: 604 #endif /* INET */ 605 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 606 if (error == 0) { 607 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 608 rtfree(saved_nrt); 609 } 610 break; 611 612 case RTM_DELETE: 613 #ifdef INET 614 /* support for new ARP code */ 615 if (info.rti_info[RTAX_GATEWAY] && 616 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 617 (rtm->rtm_flags & RTF_LLDATA) != 0) { 618 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 619 rtm->rtm_rmx.rmx_expire, &info, 0); 620 break; 621 } 622 #endif /* INET */ 623 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 624 if (error == 0) { 625 rt = saved_nrt; 626 goto report; 627 } 628 break; 629 630 case RTM_GET: 631 case RTM_CHANGE: 632 case RTM_LOCK: 633 /* XXX This will mask info.rti_info[RTAX_DST] with 634 * info.rti_info[RTAX_NETMASK] before 635 * searching. It did not used to do that. --dyoung 636 */ 637 rt = NULL; 638 error = rtrequest1(RTM_GET, &info, &rt); 639 if (error != 0) 640 senderr(error); 641 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 642 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 643 info.rti_info[RTAX_DST]->sa_len) != 0) 644 senderr(ESRCH); 645 if (info.rti_info[RTAX_NETMASK] == NULL && 646 rt_mask(rt) != NULL) 647 senderr(ETOOMANYREFS); 648 } 649 650 /* 651 * XXX if arp/ndp requests an L2 entry, we have to obtain 652 * it from lltable while for the route command we have to 653 * return a route as it is. How to distinguish them? 654 * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp 655 * indicates an L2 entry is requested. For old arp/ndp 656 * binaries, we check RTF_UP flag is NOT set; it works 657 * by the fact that arp/ndp don't set it while the route 658 * command sets it. 659 */ 660 if (((rtm->rtm_flags & RTF_LLDATA) != 0 || 661 (rtm->rtm_flags & RTF_UP) == 0) && 662 rtm->rtm_type == RTM_GET && 663 sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { 664 route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, 665 &ll_flags); 666 info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); 667 is_ll = true; 668 goto skip; 669 } 670 671 switch (rtm->rtm_type) { 672 case RTM_GET: 673 report: 674 info.rti_info[RTAX_DST] = rt_getkey(rt); 675 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 676 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 677 info.rti_info[RTAX_TAG] = rt_gettag(rt); 678 skip: 679 if ((rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) == 0) 680 ; 681 else if ((ifp = rt->rt_ifp) != NULL) { 682 const struct ifaddr *rtifa; 683 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 684 /* rtifa used to be simply rt->rt_ifa. 685 * If rt->rt_ifa != NULL, then 686 * rt_get_ifa() != NULL. So this 687 * ought to still be safe. --dyoung 688 */ 689 rtifa = rt_get_ifa(rt); 690 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 691 #ifdef RTSOCK_DEBUG 692 if (info.rti_info[RTAX_IFA]->sa_family == 693 AF_INET) { 694 char ibuf[INET_ADDRSTRLEN]; 695 char abuf[INET_ADDRSTRLEN]; 696 printf("%s: copying out RTAX_IFA %s " 697 "for info.rti_info[RTAX_DST] %s " 698 "ifa_getifa %p ifa_seqno %p\n", 699 __func__, 700 RT_IN_PRINT(ibuf, RTAX_IFA), 701 RT_IN_PRINT(abuf, RTAX_DST), 702 (void *)rtifa->ifa_getifa, 703 rtifa->ifa_seqno); 704 } 705 #endif /* RTSOCK_DEBUG */ 706 if (ifp->if_flags & IFF_POINTOPOINT) { 707 info.rti_info[RTAX_BRD] = 708 rtifa->ifa_dstaddr; 709 } else 710 info.rti_info[RTAX_BRD] = NULL; 711 rtm->rtm_index = ifp->if_index; 712 } else { 713 info.rti_info[RTAX_IFP] = NULL; 714 info.rti_info[RTAX_IFA] = NULL; 715 } 716 (void)rt_msg2(rtm->rtm_type, &info, NULL, NULL, &len); 717 if (len > rtm->rtm_msglen) { 718 old_rtm = rtm; 719 R_Malloc(rtm, struct rt_xmsghdr *, len); 720 if (rtm == NULL) 721 senderr(ENOBUFS); 722 (void)memcpy(rtm, old_rtm, old_rtm->rtm_msglen); 723 } 724 (void)rt_msg2(rtm->rtm_type, &info, rtm, NULL, 0); 725 rtm->rtm_flags = rt->rt_flags; 726 rtm_setmetrics(rt, rtm); 727 rtm->rtm_addrs = info.rti_addrs; 728 if (is_ll) { 729 rtm->rtm_flags |= RTF_LLDATA; 730 rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; 731 } 732 break; 733 734 case RTM_CHANGE: 735 /* 736 * new gateway could require new ifaddr, ifp; 737 * flags may also be different; ifp may be specified 738 * by ll sockaddr when protocol address is ambiguous 739 */ 740 if ((error = rt_getifa(&info)) != 0) 741 senderr(error); 742 if (info.rti_info[RTAX_GATEWAY]) { 743 error = rt_setgate(rt, 744 info.rti_info[RTAX_GATEWAY]); 745 if (error != 0) 746 senderr(error); 747 } 748 if (info.rti_info[RTAX_TAG]) { 749 const struct sockaddr *tag; 750 tag = rt_settag(rt, info.rti_info[RTAX_TAG]); 751 if (tag == NULL) 752 senderr(ENOBUFS); 753 } 754 /* new gateway could require new ifaddr, ifp; 755 flags may also be different; ifp may be specified 756 by ll sockaddr when protocol address is ambiguous */ 757 if (info.rti_info[RTAX_IFP] && 758 (ifa = ifa_ifwithnet(info.rti_info[RTAX_IFP])) && 759 (ifp = ifa->ifa_ifp) && (info.rti_info[RTAX_IFA] || 760 info.rti_info[RTAX_GATEWAY])) { 761 if (info.rti_info[RTAX_IFA] == NULL || 762 (ifa = ifa_ifwithaddr( 763 info.rti_info[RTAX_IFA])) == NULL) 764 ifa = ifaof_ifpforaddr( 765 info.rti_info[RTAX_IFA] ? 766 info.rti_info[RTAX_IFA] : 767 info.rti_info[RTAX_GATEWAY], ifp); 768 } else if ((info.rti_info[RTAX_IFA] && 769 (ifa = ifa_ifwithaddr(info.rti_info[RTAX_IFA]))) || 770 (info.rti_info[RTAX_GATEWAY] && 771 (ifa = ifa_ifwithroute(rt->rt_flags, 772 rt_getkey(rt), info.rti_info[RTAX_GATEWAY])))) { 773 ifp = ifa->ifa_ifp; 774 } 775 if (ifa) { 776 struct ifaddr *oifa = rt->rt_ifa; 777 if (oifa != ifa) { 778 if (oifa && oifa->ifa_rtrequest) { 779 oifa->ifa_rtrequest(RTM_DELETE, 780 rt, &info); 781 } 782 rt_replace_ifa(rt, ifa); 783 rt->rt_ifp = ifp; 784 } 785 } 786 if (ifp && rt->rt_ifp != ifp) 787 rt->rt_ifp = ifp; 788 rt_setmetrics(rtm->rtm_inits, rtm, rt); 789 if (rt->rt_flags != info.rti_flags) 790 rt->rt_flags = (info.rti_flags & ~PRESERVED_RTF) 791 | (rt->rt_flags & PRESERVED_RTF); 792 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 793 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 794 /*FALLTHROUGH*/ 795 case RTM_LOCK: 796 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 797 rt->rt_rmx.rmx_locks |= 798 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 799 break; 800 } 801 break; 802 803 default: 804 senderr(EOPNOTSUPP); 805 } 806 807 flush: 808 if (rtm) { 809 if (error) 810 rtm->rtm_errno = error; 811 else 812 rtm->rtm_flags |= RTF_DONE; 813 } 814 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 815 0; 816 /* We cannot free old_rtm until we have stopped using the 817 * pointers in info, some of which may point to sockaddrs 818 * in old_rtm. 819 */ 820 if (old_rtm != NULL) 821 Free(old_rtm); 822 if (rt) 823 rtfree(rt); 824 { 825 struct rawcb *rp = NULL; 826 /* 827 * Check to see if we don't want our own messages. 828 */ 829 if ((so->so_options & SO_USELOOPBACK) == 0) { 830 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 831 if (rtm) 832 Free(rtm); 833 m_freem(m); 834 return error; 835 } 836 /* There is another listener, so construct message */ 837 rp = sotorawcb(so); 838 } 839 if (rtm) { 840 m_copyback(m, 0, rtm->rtm_msglen, rtm); 841 if (m->m_pkthdr.len < rtm->rtm_msglen) { 842 m_freem(m); 843 m = NULL; 844 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 845 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 846 Free(rtm); 847 } 848 if (rp) 849 rp->rcb_proto.sp_family = 0; /* Avoid us */ 850 if (family) 851 proto.sp_protocol = family; 852 if (m) 853 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 854 &COMPATNAME(route_info).ri_dst); 855 if (rp) 856 rp->rcb_proto.sp_family = PF_XROUTE; 857 } 858 return error; 859 } 860 861 static void 862 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 863 { 864 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 865 metric(RTV_RPIPE, rmx_recvpipe); 866 metric(RTV_SPIPE, rmx_sendpipe); 867 metric(RTV_SSTHRESH, rmx_ssthresh); 868 metric(RTV_RTT, rmx_rtt); 869 metric(RTV_RTTVAR, rmx_rttvar); 870 metric(RTV_HOPCOUNT, rmx_hopcount); 871 metric(RTV_MTU, rmx_mtu); 872 #undef metric 873 if (which & RTV_EXPIRE) { 874 out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? 875 time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; 876 } 877 } 878 879 static void 880 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 881 { 882 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 883 metric(rmx_recvpipe); 884 metric(rmx_sendpipe); 885 metric(rmx_ssthresh); 886 metric(rmx_rtt); 887 metric(rmx_rttvar); 888 metric(rmx_hopcount); 889 metric(rmx_mtu); 890 #undef metric 891 out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? 892 time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; 893 } 894 895 static int 896 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 897 struct rt_addrinfo *rtinfo) 898 { 899 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 900 int i; 901 902 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 903 if ((rtinfo->rti_addrs & (1 << i)) == 0) 904 continue; 905 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 906 RT_XADVANCE(cp, sa); 907 } 908 909 /* 910 * Check for extra addresses specified, except RTM_GET asking 911 * for interface info. 912 */ 913 if (rtmtype == RTM_GET) { 914 if (((rtinfo->rti_addrs & 915 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0 << i)) != 0) 916 return 1; 917 } else if ((rtinfo->rti_addrs & (~0 << i)) != 0) 918 return 1; 919 /* Check for bad data length. */ 920 if (cp != cplim) { 921 if (i == RTAX_NETMASK + 1 && sa != NULL && 922 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 923 /* 924 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 925 * We accept this for now for the sake of old 926 * binaries or third party softwares. 927 */ 928 ; 929 else 930 return 1; 931 } 932 return 0; 933 } 934 935 static int 936 rt_getlen(int type) 937 { 938 #ifndef COMPAT_RTSOCK 939 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 940 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 941 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 942 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 943 #endif 944 945 switch (type) { 946 case RTM_DELADDR: 947 case RTM_NEWADDR: 948 case RTM_CHGADDR: 949 return sizeof(struct ifa_xmsghdr); 950 951 case RTM_OOIFINFO: 952 #ifdef COMPAT_14 953 return sizeof(struct if_msghdr14); 954 #else 955 #ifdef DIAGNOSTIC 956 printf("RTM_OOIFINFO\n"); 957 #endif 958 return -1; 959 #endif 960 case RTM_OIFINFO: 961 #ifdef COMPAT_50 962 return sizeof(struct if_msghdr50); 963 #else 964 #ifdef DIAGNOSTIC 965 printf("RTM_OIFINFO\n"); 966 #endif 967 return -1; 968 #endif 969 970 case RTM_IFINFO: 971 return sizeof(struct if_xmsghdr); 972 973 case RTM_IFANNOUNCE: 974 case RTM_IEEE80211: 975 return sizeof(struct if_xannouncemsghdr); 976 977 default: 978 return sizeof(struct rt_xmsghdr); 979 } 980 } 981 982 983 struct mbuf * 984 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 985 { 986 struct rt_xmsghdr *rtm; 987 struct mbuf *m; 988 int i; 989 const struct sockaddr *sa; 990 int len, dlen; 991 992 m = m_gethdr(M_DONTWAIT, MT_DATA); 993 if (m == NULL) 994 return m; 995 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 996 997 if ((len = rt_getlen(type)) == -1) 998 goto out; 999 if (len > MHLEN + MLEN) 1000 panic("%s: message too long", __func__); 1001 else if (len > MHLEN) { 1002 m->m_next = m_get(M_DONTWAIT, MT_DATA); 1003 if (m->m_next == NULL) 1004 goto out; 1005 MCLAIM(m->m_next, m->m_owner); 1006 m->m_pkthdr.len = len; 1007 m->m_len = MHLEN; 1008 m->m_next->m_len = len - MHLEN; 1009 } else { 1010 m->m_pkthdr.len = m->m_len = len; 1011 } 1012 m->m_pkthdr.rcvif = NULL; 1013 m_copyback(m, 0, datalen, data); 1014 if (len > datalen) 1015 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 1016 rtm = mtod(m, struct rt_xmsghdr *); 1017 for (i = 0; i < RTAX_MAX; i++) { 1018 if ((sa = rtinfo->rti_info[i]) == NULL) 1019 continue; 1020 rtinfo->rti_addrs |= (1 << i); 1021 dlen = RT_XROUNDUP(sa->sa_len); 1022 m_copyback(m, len, sa->sa_len, sa); 1023 if (dlen != sa->sa_len) { 1024 /* 1025 * Up to 6 + 1 nul's since roundup is to 1026 * sizeof(uint64_t) (8 bytes) 1027 */ 1028 m_copyback(m, len + sa->sa_len, 1029 dlen - sa->sa_len, "\0\0\0\0\0\0"); 1030 } 1031 len += dlen; 1032 } 1033 if (m->m_pkthdr.len != len) 1034 goto out; 1035 rtm->rtm_msglen = len; 1036 rtm->rtm_version = RTM_XVERSION; 1037 rtm->rtm_type = type; 1038 return m; 1039 out: 1040 m_freem(m); 1041 return NULL; 1042 } 1043 1044 /* 1045 * rt_msg2 1046 * 1047 * fills 'cp' or 'w'.w_tmem with the routing socket message and 1048 * returns the length of the message in 'lenp'. 1049 * 1050 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 1051 * the message 1052 * otherwise walkarg's w_needed is updated and if the user buffer is 1053 * specified and w_needed indicates space exists the information is copied 1054 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 1055 * if the allocation fails ENOBUFS is returned. 1056 */ 1057 static int 1058 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1059 int *lenp) 1060 { 1061 int i; 1062 int len, dlen, second_time = 0; 1063 char *cp0, *cp = cpv; 1064 1065 rtinfo->rti_addrs = 0; 1066 again: 1067 if ((len = rt_getlen(type)) == -1) 1068 return EINVAL; 1069 1070 if ((cp0 = cp) != NULL) 1071 cp += len; 1072 for (i = 0; i < RTAX_MAX; i++) { 1073 const struct sockaddr *sa; 1074 1075 if ((sa = rtinfo->rti_info[i]) == NULL) 1076 continue; 1077 rtinfo->rti_addrs |= (1 << i); 1078 dlen = RT_XROUNDUP(sa->sa_len); 1079 if (cp) { 1080 int diff = dlen - sa->sa_len; 1081 (void)memcpy(cp, sa, (size_t)sa->sa_len); 1082 cp += sa->sa_len; 1083 if (diff > 0) { 1084 (void)memset(cp, 0, (size_t)diff); 1085 cp += diff; 1086 } 1087 } 1088 len += dlen; 1089 } 1090 if (cp == NULL && w != NULL && !second_time) { 1091 struct rt_walkarg *rw = w; 1092 1093 rw->w_needed += len; 1094 if (rw->w_needed <= 0 && rw->w_where) { 1095 if (rw->w_tmemsize < len) { 1096 if (rw->w_tmem) 1097 free(rw->w_tmem, M_RTABLE); 1098 rw->w_tmem = malloc(len, M_RTABLE, M_NOWAIT); 1099 if (rw->w_tmem) 1100 rw->w_tmemsize = len; 1101 else 1102 rw->w_tmemsize = 0; 1103 } 1104 if (rw->w_tmem) { 1105 cp = rw->w_tmem; 1106 second_time = 1; 1107 goto again; 1108 } else { 1109 rw->w_tmemneeded = len; 1110 return ENOBUFS; 1111 } 1112 } 1113 } 1114 if (cp) { 1115 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 1116 1117 rtm->rtm_version = RTM_XVERSION; 1118 rtm->rtm_type = type; 1119 rtm->rtm_msglen = len; 1120 } 1121 if (lenp) 1122 *lenp = len; 1123 return 0; 1124 } 1125 1126 #ifndef COMPAT_RTSOCK 1127 int 1128 rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1129 int *lenp) 1130 { 1131 return rt_msg2(type, rtinfo, cpv, w, lenp); 1132 } 1133 #endif 1134 1135 /* 1136 * This routine is called to generate a message from the routing 1137 * socket indicating that a redirect has occurred, a routing lookup 1138 * has failed, or that a protocol has detected timeouts to a particular 1139 * destination. 1140 */ 1141 void 1142 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 1143 int error) 1144 { 1145 struct rt_xmsghdr rtm; 1146 struct mbuf *m; 1147 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1148 struct rt_addrinfo info = *rtinfo; 1149 1150 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 1151 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1152 return; 1153 memset(&rtm, 0, sizeof(rtm)); 1154 rtm.rtm_pid = curproc->p_pid; 1155 rtm.rtm_flags = RTF_DONE | flags; 1156 rtm.rtm_errno = error; 1157 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 1158 if (m == NULL) 1159 return; 1160 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1161 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1162 } 1163 1164 /* 1165 * This routine is called to generate a message from the routing 1166 * socket indicating that the status of a network interface has changed. 1167 */ 1168 void 1169 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1170 { 1171 struct if_xmsghdr ifm; 1172 struct mbuf *m; 1173 struct rt_addrinfo info; 1174 1175 COMPATCALL(rt_ifmsg, (ifp)); 1176 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1177 return; 1178 (void)memset(&info, 0, sizeof(info)); 1179 (void)memset(&ifm, 0, sizeof(ifm)); 1180 ifm.ifm_index = ifp->if_index; 1181 ifm.ifm_flags = ifp->if_flags; 1182 ifm.ifm_data = ifp->if_data; 1183 ifm.ifm_addrs = 0; 1184 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1185 if (m == NULL) 1186 return; 1187 COMPATNAME(route_enqueue)(m, 0); 1188 #ifdef COMPAT_14 1189 compat_14_rt_oifmsg(ifp); 1190 #endif 1191 #ifdef COMPAT_50 1192 compat_50_rt_oifmsg(ifp); 1193 #endif 1194 } 1195 1196 1197 /* 1198 * This is called to generate messages from the routing socket 1199 * indicating a network interface has had addresses associated with it. 1200 * if we ever reverse the logic and replace messages TO the routing 1201 * socket indicate a request to configure interfaces, then it will 1202 * be unnecessary as the routing socket will automatically generate 1203 * copies of it. 1204 */ 1205 void 1206 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1207 struct rtentry *rt) 1208 { 1209 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1210 struct rt_addrinfo info; 1211 const struct sockaddr *sa; 1212 int pass; 1213 struct mbuf *m; 1214 struct ifnet *ifp; 1215 struct rt_xmsghdr rtm; 1216 struct ifa_xmsghdr ifam; 1217 int ncmd; 1218 1219 KASSERT(ifa != NULL); 1220 ifp = ifa->ifa_ifp; 1221 #ifdef SCTP 1222 if (cmd == RTM_ADD) { 1223 sctp_add_ip_address(ifa); 1224 } else if (cmd == RTM_DELETE) { 1225 sctp_delete_ip_address(ifa); 1226 } 1227 #endif 1228 1229 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1230 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1231 return; 1232 for (pass = 1; pass < 3; pass++) { 1233 memset(&info, 0, sizeof(info)); 1234 switch (cmdpass(cmd, pass)) { 1235 case cmdpass(RTM_ADD, 1): 1236 case cmdpass(RTM_CHANGE, 1): 1237 case cmdpass(RTM_DELETE, 2): 1238 case cmdpass(RTM_NEWADDR, 1): 1239 case cmdpass(RTM_DELADDR, 1): 1240 case cmdpass(RTM_CHGADDR, 1): 1241 switch (cmd) { 1242 case RTM_ADD: 1243 ncmd = RTM_NEWADDR; 1244 break; 1245 case RTM_DELETE: 1246 ncmd = RTM_DELADDR; 1247 break; 1248 case RTM_CHANGE: 1249 ncmd = RTM_CHGADDR; 1250 break; 1251 default: 1252 ncmd = cmd; 1253 } 1254 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1255 KASSERT(ifp->if_dl != NULL); 1256 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1257 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1258 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1259 memset(&ifam, 0, sizeof(ifam)); 1260 ifam.ifam_index = ifp->if_index; 1261 ifam.ifam_metric = ifa->ifa_metric; 1262 ifam.ifam_flags = ifa->ifa_flags; 1263 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1264 if (m == NULL) 1265 continue; 1266 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1267 info.rti_addrs; 1268 break; 1269 case cmdpass(RTM_ADD, 2): 1270 case cmdpass(RTM_CHANGE, 2): 1271 case cmdpass(RTM_DELETE, 1): 1272 if (rt == NULL) 1273 continue; 1274 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1275 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1276 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1277 memset(&rtm, 0, sizeof(rtm)); 1278 rtm.rtm_pid = curproc->p_pid; 1279 rtm.rtm_index = ifp->if_index; 1280 rtm.rtm_flags |= rt->rt_flags; 1281 rtm.rtm_errno = error; 1282 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1283 if (m == NULL) 1284 continue; 1285 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1286 break; 1287 default: 1288 continue; 1289 } 1290 #ifdef DIAGNOSTIC 1291 if (m == NULL) 1292 panic("%s: called with wrong command", __func__); 1293 #endif 1294 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1295 } 1296 #undef cmdpass 1297 } 1298 1299 static struct mbuf * 1300 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1301 struct rt_addrinfo *info) 1302 { 1303 struct if_xannouncemsghdr ifan; 1304 1305 memset(info, 0, sizeof(*info)); 1306 memset(&ifan, 0, sizeof(ifan)); 1307 ifan.ifan_index = ifp->if_index; 1308 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1309 ifan.ifan_what = what; 1310 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1311 } 1312 1313 /* 1314 * This is called to generate routing socket messages indicating 1315 * network interface arrival and departure. 1316 */ 1317 void 1318 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1319 { 1320 struct mbuf *m; 1321 struct rt_addrinfo info; 1322 1323 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1324 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1325 return; 1326 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1327 if (m == NULL) 1328 return; 1329 COMPATNAME(route_enqueue)(m, 0); 1330 } 1331 1332 /* 1333 * This is called to generate routing socket messages indicating 1334 * IEEE80211 wireless events. 1335 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1336 */ 1337 void 1338 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1339 size_t data_len) 1340 { 1341 struct mbuf *m; 1342 struct rt_addrinfo info; 1343 1344 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1345 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1346 return; 1347 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1348 if (m == NULL) 1349 return; 1350 /* 1351 * Append the ieee80211 data. Try to stick it in the 1352 * mbuf containing the ifannounce msg; otherwise allocate 1353 * a new mbuf and append. 1354 * 1355 * NB: we assume m is a single mbuf. 1356 */ 1357 if (data_len > M_TRAILINGSPACE(m)) { 1358 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1359 if (n == NULL) { 1360 m_freem(m); 1361 return; 1362 } 1363 (void)memcpy(mtod(n, void *), data, data_len); 1364 n->m_len = data_len; 1365 m->m_next = n; 1366 } else if (data_len > 0) { 1367 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1368 m->m_len += data_len; 1369 } 1370 if (m->m_flags & M_PKTHDR) 1371 m->m_pkthdr.len += data_len; 1372 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1373 COMPATNAME(route_enqueue)(m, 0); 1374 } 1375 1376 /* 1377 * This is used in dumping the kernel table via sysctl(). 1378 */ 1379 static int 1380 sysctl_dumpentry(struct rtentry *rt, void *v) 1381 { 1382 struct rt_walkarg *w = v; 1383 int error = 0, size; 1384 struct rt_addrinfo info; 1385 1386 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1387 return 0; 1388 memset(&info, 0, sizeof(info)); 1389 info.rti_info[RTAX_DST] = rt_getkey(rt); 1390 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1391 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1392 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1393 if (rt->rt_ifp) { 1394 const struct ifaddr *rtifa; 1395 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1396 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1397 * then rt_get_ifa() != NULL. So this ought to still be safe. 1398 * --dyoung 1399 */ 1400 rtifa = rt_get_ifa(rt); 1401 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1402 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1403 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1404 } 1405 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1406 return error; 1407 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1408 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1409 1410 rtm->rtm_flags = rt->rt_flags; 1411 rtm->rtm_use = rt->rt_use; 1412 rtm_setmetrics(rt, rtm); 1413 KASSERT(rt->rt_ifp != NULL); 1414 rtm->rtm_index = rt->rt_ifp->if_index; 1415 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1416 rtm->rtm_addrs = info.rti_addrs; 1417 if ((error = copyout(rtm, w->w_where, size)) != 0) 1418 w->w_where = NULL; 1419 else 1420 w->w_where = (char *)w->w_where + size; 1421 } 1422 return error; 1423 } 1424 1425 static int 1426 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1427 { 1428 struct ifnet *ifp; 1429 struct ifaddr *ifa; 1430 struct rt_addrinfo info; 1431 int len, error = 0; 1432 int s; 1433 struct psref psref; 1434 int bound = curlwp->l_pflag & LP_BOUND; 1435 1436 memset(&info, 0, sizeof(info)); 1437 1438 curlwp->l_pflag |= LP_BOUND; 1439 s = pserialize_read_enter(); 1440 IFNET_READER_FOREACH(ifp) { 1441 if (w->w_arg && w->w_arg != ifp->if_index) 1442 continue; 1443 if (IFADDR_EMPTY(ifp)) 1444 continue; 1445 1446 psref_acquire(&psref, &ifp->if_psref, ifnet_psref_class); 1447 pserialize_read_exit(s); 1448 1449 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1450 switch (type) { 1451 case NET_RT_IFLIST: 1452 error = rt_msg2(RTM_IFINFO, &info, NULL, w, &len); 1453 break; 1454 #ifdef COMPAT_14 1455 case NET_RT_OOIFLIST: 1456 error = rt_msg2(RTM_OOIFINFO, &info, NULL, w, &len); 1457 break; 1458 #endif 1459 #ifdef COMPAT_50 1460 case NET_RT_OIFLIST: 1461 error = rt_msg2(RTM_OIFINFO, &info, NULL, w, &len); 1462 break; 1463 #endif 1464 default: 1465 panic("sysctl_iflist(1)"); 1466 } 1467 if (error) 1468 goto release_exit; 1469 info.rti_info[RTAX_IFP] = NULL; 1470 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1471 switch (type) { 1472 case NET_RT_IFLIST: { 1473 struct if_xmsghdr *ifm; 1474 1475 ifm = (struct if_xmsghdr *)w->w_tmem; 1476 ifm->ifm_index = ifp->if_index; 1477 ifm->ifm_flags = ifp->if_flags; 1478 ifm->ifm_data = ifp->if_data; 1479 ifm->ifm_addrs = info.rti_addrs; 1480 error = copyout(ifm, w->w_where, len); 1481 if (error) 1482 goto release_exit; 1483 w->w_where = (char *)w->w_where + len; 1484 break; 1485 } 1486 1487 #ifdef COMPAT_14 1488 case NET_RT_OOIFLIST: 1489 error = compat_14_iflist(ifp, w, &info, len); 1490 if (error) 1491 goto release_exit; 1492 break; 1493 #endif 1494 #ifdef COMPAT_50 1495 case NET_RT_OIFLIST: 1496 error = compat_50_iflist(ifp, w, &info, len); 1497 if (error) 1498 goto release_exit; 1499 break; 1500 #endif 1501 default: 1502 panic("sysctl_iflist(2)"); 1503 } 1504 } 1505 IFADDR_FOREACH(ifa, ifp) { 1506 if (af && af != ifa->ifa_addr->sa_family) 1507 continue; 1508 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1509 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1510 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1511 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 1512 goto release_exit; 1513 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1514 struct ifa_xmsghdr *ifam; 1515 1516 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1517 ifam->ifam_index = ifa->ifa_ifp->if_index; 1518 ifam->ifam_flags = ifa->ifa_flags; 1519 ifam->ifam_metric = ifa->ifa_metric; 1520 ifam->ifam_addrs = info.rti_addrs; 1521 error = copyout(w->w_tmem, w->w_where, len); 1522 if (error) 1523 goto release_exit; 1524 w->w_where = (char *)w->w_where + len; 1525 } 1526 } 1527 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1528 info.rti_info[RTAX_BRD] = NULL; 1529 1530 s = pserialize_read_enter(); 1531 psref_release(&psref, &ifp->if_psref, ifnet_psref_class); 1532 } 1533 pserialize_read_exit(s); 1534 curlwp->l_pflag ^= bound ^ LP_BOUND; 1535 1536 return 0; 1537 1538 release_exit: 1539 psref_release(&psref, &ifp->if_psref, ifnet_psref_class); 1540 curlwp->l_pflag ^= bound ^ LP_BOUND; 1541 return error; 1542 } 1543 1544 static int 1545 sysctl_rtable(SYSCTLFN_ARGS) 1546 { 1547 void *where = oldp; 1548 size_t *given = oldlenp; 1549 int i, s, error = EINVAL; 1550 u_char af; 1551 struct rt_walkarg w; 1552 1553 if (namelen == 1 && name[0] == CTL_QUERY) 1554 return sysctl_query(SYSCTLFN_CALL(rnode)); 1555 1556 if (newp) 1557 return EPERM; 1558 if (namelen != 3) 1559 return EINVAL; 1560 af = name[0]; 1561 w.w_tmemneeded = 0; 1562 w.w_tmemsize = 0; 1563 w.w_tmem = NULL; 1564 again: 1565 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1566 if (w.w_tmemneeded) { 1567 w.w_tmem = malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1568 w.w_tmemsize = w.w_tmemneeded; 1569 w.w_tmemneeded = 0; 1570 } 1571 w.w_op = name[1]; 1572 w.w_arg = name[2]; 1573 w.w_given = *given; 1574 w.w_needed = 0 - w.w_given; 1575 w.w_where = where; 1576 1577 s = splsoftnet(); 1578 switch (w.w_op) { 1579 1580 case NET_RT_DUMP: 1581 case NET_RT_FLAGS: 1582 #ifdef INET 1583 /* 1584 * take care of llinfo entries, the caller must 1585 * specify an AF 1586 */ 1587 if (w.w_op == NET_RT_FLAGS && 1588 (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { 1589 if (af != 0) 1590 error = lltable_sysctl_dumparp(af, &w); 1591 else 1592 error = EINVAL; 1593 break; 1594 } 1595 #endif /* INET */ 1596 1597 for (i = 1; i <= AF_MAX; i++) 1598 if ((af == 0 || af == i) && 1599 (error = rt_walktree(i, sysctl_dumpentry, &w))) 1600 break; 1601 break; 1602 1603 #ifdef COMPAT_14 1604 case NET_RT_OOIFLIST: 1605 error = sysctl_iflist(af, &w, w.w_op); 1606 break; 1607 #endif 1608 #ifdef COMPAT_50 1609 case NET_RT_OIFLIST: 1610 error = sysctl_iflist(af, &w, w.w_op); 1611 break; 1612 #endif 1613 case NET_RT_IFLIST: 1614 error = sysctl_iflist(af, &w, w.w_op); 1615 break; 1616 } 1617 splx(s); 1618 1619 /* check to see if we couldn't allocate memory with NOWAIT */ 1620 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1621 goto again; 1622 1623 if (w.w_tmem) 1624 free(w.w_tmem, M_RTABLE); 1625 w.w_needed += w.w_given; 1626 if (where) { 1627 *given = (char *)w.w_where - (char *)where; 1628 if (*given < w.w_needed) 1629 return ENOMEM; 1630 } else { 1631 *given = (11 * w.w_needed) / 10; 1632 } 1633 return error; 1634 } 1635 1636 /* 1637 * Routing message software interrupt routine 1638 */ 1639 static void 1640 COMPATNAME(route_intr)(void *cookie) 1641 { 1642 struct sockproto proto = { .sp_family = PF_XROUTE, }; 1643 struct route_info * const ri = &COMPATNAME(route_info); 1644 struct mbuf *m; 1645 int s; 1646 1647 mutex_enter(softnet_lock); 1648 KERNEL_LOCK(1, NULL); 1649 while (!IF_IS_EMPTY(&ri->ri_intrq)) { 1650 s = splnet(); 1651 IF_DEQUEUE(&ri->ri_intrq, m); 1652 splx(s); 1653 if (m == NULL) 1654 break; 1655 proto.sp_protocol = M_GETCTX(m, uintptr_t); 1656 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); 1657 } 1658 KERNEL_UNLOCK_ONE(NULL); 1659 mutex_exit(softnet_lock); 1660 } 1661 1662 /* 1663 * Enqueue a message to the software interrupt routine. 1664 */ 1665 void 1666 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 1667 { 1668 struct route_info * const ri = &COMPATNAME(route_info); 1669 int s, wasempty; 1670 1671 s = splnet(); 1672 if (IF_QFULL(&ri->ri_intrq)) { 1673 IF_DROP(&ri->ri_intrq); 1674 m_freem(m); 1675 } else { 1676 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 1677 M_SETCTX(m, (uintptr_t)family); 1678 IF_ENQUEUE(&ri->ri_intrq, m); 1679 if (wasempty) 1680 softint_schedule(ri->ri_sih); 1681 } 1682 splx(s); 1683 } 1684 1685 static void 1686 COMPATNAME(route_init)(void) 1687 { 1688 struct route_info * const ri = &COMPATNAME(route_info); 1689 1690 #ifndef COMPAT_RTSOCK 1691 rt_init(); 1692 #endif 1693 1694 sysctl_net_route_setup(NULL); 1695 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 1696 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 1697 COMPATNAME(route_intr), NULL); 1698 } 1699 1700 /* 1701 * Definitions of protocols supported in the ROUTE domain. 1702 */ 1703 #ifndef COMPAT_RTSOCK 1704 PR_WRAP_USRREQS(route); 1705 #else 1706 PR_WRAP_USRREQS(compat_50_route); 1707 #endif 1708 1709 static const struct pr_usrreqs route_usrreqs = { 1710 .pr_attach = COMPATNAME(route_attach_wrapper), 1711 .pr_detach = COMPATNAME(route_detach_wrapper), 1712 .pr_accept = COMPATNAME(route_accept_wrapper), 1713 .pr_bind = COMPATNAME(route_bind_wrapper), 1714 .pr_listen = COMPATNAME(route_listen_wrapper), 1715 .pr_connect = COMPATNAME(route_connect_wrapper), 1716 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 1717 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 1718 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 1719 .pr_abort = COMPATNAME(route_abort_wrapper), 1720 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 1721 .pr_stat = COMPATNAME(route_stat_wrapper), 1722 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 1723 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 1724 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 1725 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 1726 .pr_send = COMPATNAME(route_send_wrapper), 1727 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 1728 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 1729 }; 1730 1731 static const struct protosw COMPATNAME(route_protosw)[] = { 1732 { 1733 .pr_type = SOCK_RAW, 1734 .pr_domain = &COMPATNAME(routedomain), 1735 .pr_flags = PR_ATOMIC|PR_ADDR, 1736 .pr_input = raw_input, 1737 .pr_ctlinput = raw_ctlinput, 1738 .pr_usrreqs = &route_usrreqs, 1739 .pr_init = raw_init, 1740 }, 1741 }; 1742 1743 struct domain COMPATNAME(routedomain) = { 1744 .dom_family = PF_XROUTE, 1745 .dom_name = DOMAINNAME, 1746 .dom_init = COMPATNAME(route_init), 1747 .dom_protosw = COMPATNAME(route_protosw), 1748 .dom_protoswNPROTOSW = 1749 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 1750 }; 1751 1752 static void 1753 sysctl_net_route_setup(struct sysctllog **clog) 1754 { 1755 const struct sysctlnode *rnode = NULL; 1756 1757 sysctl_createv(clog, 0, NULL, &rnode, 1758 CTLFLAG_PERMANENT, 1759 CTLTYPE_NODE, DOMAINNAME, 1760 SYSCTL_DESCR("PF_ROUTE information"), 1761 NULL, 0, NULL, 0, 1762 CTL_NET, PF_XROUTE, CTL_EOL); 1763 1764 sysctl_createv(clog, 0, NULL, NULL, 1765 CTLFLAG_PERMANENT, 1766 CTLTYPE_NODE, "rtable", 1767 SYSCTL_DESCR("Routing table information"), 1768 sysctl_rtable, 0, NULL, 0, 1769 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 1770 1771 sysctl_createv(clog, 0, &rnode, NULL, 1772 CTLFLAG_PERMANENT, 1773 CTLTYPE_STRUCT, "stats", 1774 SYSCTL_DESCR("Routing statistics"), 1775 NULL, 0, &rtstat, sizeof(rtstat), 1776 CTL_CREATE, CTL_EOL); 1777 } 1778
Indexes created Mon Sep 22 13:09:51 GMT 2025