1 /* $NetBSD: rtsock_shared.c,v 1.9 2019/05/03 02:10:58 pgoyette 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_shared.c,v 1.9 2019/05/03 02:10:58 pgoyette Exp $"); 65 66 #ifdef _KERNEL_OPT 67 #include "opt_inet.h" 68 #include "opt_net_mpsafe.h" 69 #endif 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/proc.h> 74 #include <sys/socket.h> 75 #include <sys/socketvar.h> 76 #include <sys/domain.h> 77 #include <sys/protosw.h> 78 #include <sys/sysctl.h> 79 #include <sys/kauth.h> 80 #include <sys/kmem.h> 81 #include <sys/intr.h> 82 #include <sys/condvar.h> 83 #include <sys/compat_stub.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 #include <compat/net/if.h> 97 #include <compat/net/route.h> 98 99 #ifdef COMPAT_RTSOCK 100 /* 101 * These are used when #include-d from compat/common/rtsock_50.c 102 */ 103 #define RTM_XVERSION RTM_OVERSION 104 #define RTM_XNEWADDR RTM_ONEWADDR 105 #define RTM_XDELADDR RTM_ODELADDR 106 #define RTM_XCHGADDR RTM_OCHGADDR 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 #define COMPATCALL(name, args) \ 117 MODULE_HOOK_CALL_VOID(rtsock_ ## name ## _50_hook, args, __nothing); 118 #define RTS_CTASSERT(x) __nothing 119 CTASSERT(sizeof(struct ifa_xmsghdr) == 20); 120 DOMAIN_DEFINE(compat_50_routedomain); /* forward declare and add to link set */ 121 #else /* COMPAT_RTSOCK */ 122 /* 123 * These are used when #include-d from compat/common/rtsock_50.c 124 */ 125 #define RTM_XVERSION RTM_VERSION 126 #define RTM_XNEWADDR RTM_NEWADDR 127 #define RTM_XDELADDR RTM_DELADDR 128 #define RTM_XCHGADDR RTM_CHGADDR 129 #define RT_XADVANCE(a,b) RT_ADVANCE(a,b) 130 #define RT_XROUNDUP(n) RT_ROUNDUP(n) 131 #define PF_XROUTE PF_ROUTE 132 #define rt_xmsghdr rt_msghdr 133 #define if_xmsghdr if_msghdr 134 #define ifa_xmsghdr ifa_msghdr 135 #define if_xannouncemsghdr if_announcemsghdr 136 #define COMPATNAME(x) x 137 #define DOMAINNAME "route" 138 #define COMPATCALL(name, args) __nothing; 139 #define RTS_CTASSERT(x) CTASSERT(x) 140 CTASSERT(sizeof(struct ifa_xmsghdr) == 32); 141 DOMAIN_DEFINE(routedomain); /* forward declare and add to link set */ 142 #endif /* COMPAT_RTSOCK */ 143 144 #ifdef RTSOCK_DEBUG 145 #define RT_IN_PRINT(info, b, a) (in_print((b), sizeof(b), \ 146 &((const struct sockaddr_in *)(info)->rti_info[(a)])->sin_addr), (b)) 147 #endif /* RTSOCK_DEBUG */ 148 149 struct route_info COMPATNAME(route_info) = { 150 .ri_dst = { .sa_len = 2, .sa_family = PF_XROUTE, }, 151 .ri_src = { .sa_len = 2, .sa_family = PF_XROUTE, }, 152 .ri_maxqlen = IFQ_MAXLEN, 153 }; 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 rt_adjustcount(int, int); 165 166 static const struct protosw COMPATNAME(route_protosw)[]; 167 168 struct routecb { 169 struct rawcb rocb_rcb; 170 unsigned int rocb_msgfilter; 171 #define RTMSGFILTER(m) (1U << (m)) 172 }; 173 #define sotoroutecb(so) ((struct routecb *)(so)->so_pcb) 174 175 static struct rawcbhead rt_rawcb; 176 #ifdef NET_MPSAFE 177 static kmutex_t *rt_so_mtx; 178 179 static bool rt_updating = false; 180 static kcondvar_t rt_update_cv; 181 #endif 182 183 static void 184 rt_adjustcount(int af, int cnt) 185 { 186 struct route_cb * const cb = &COMPATNAME(route_info).ri_cb; 187 188 cb->any_count += cnt; 189 190 switch (af) { 191 case AF_INET: 192 cb->ip_count += cnt; 193 return; 194 #ifdef INET6 195 case AF_INET6: 196 cb->ip6_count += cnt; 197 return; 198 #endif 199 case AF_MPLS: 200 cb->mpls_count += cnt; 201 return; 202 } 203 } 204 205 static int 206 COMPATNAME(route_filter)(struct mbuf *m, struct sockproto *proto, 207 struct rawcb *rp) 208 { 209 struct routecb *rop = (struct routecb *)rp; 210 struct rt_xmsghdr *rtm; 211 212 KASSERT(m != NULL); 213 KASSERT(proto != NULL); 214 KASSERT(rp != NULL); 215 216 /* Wrong family for this socket. */ 217 if (proto->sp_family != PF_ROUTE) 218 return ENOPROTOOPT; 219 220 /* If no filter set, just return. */ 221 if (rop->rocb_msgfilter == 0) 222 return 0; 223 224 /* Ensure we can access rtm_type */ 225 if (m->m_len < 226 offsetof(struct rt_xmsghdr, rtm_type) + sizeof(rtm->rtm_type)) 227 return EINVAL; 228 229 rtm = mtod(m, struct rt_xmsghdr *); 230 /* If the rtm type is filtered out, return a positive. */ 231 if (!(rop->rocb_msgfilter & RTMSGFILTER(rtm->rtm_type))) 232 return EEXIST; 233 234 /* Passed the filter. */ 235 return 0; 236 } 237 238 static void 239 rt_pr_init(void) 240 { 241 242 LIST_INIT(&rt_rawcb); 243 } 244 245 static int 246 COMPATNAME(route_attach)(struct socket *so, int proto) 247 { 248 struct rawcb *rp; 249 struct routecb *rop; 250 int s, error; 251 252 KASSERT(sotorawcb(so) == NULL); 253 rop = kmem_zalloc(sizeof(*rop), KM_SLEEP); 254 rp = &rop->rocb_rcb; 255 rp->rcb_len = sizeof(*rop); 256 so->so_pcb = rp; 257 258 s = splsoftnet(); 259 260 #ifdef NET_MPSAFE 261 KASSERT(so->so_lock == NULL); 262 mutex_obj_hold(rt_so_mtx); 263 so->so_lock = rt_so_mtx; 264 solock(so); 265 #endif 266 267 if ((error = raw_attach(so, proto, &rt_rawcb)) == 0) { 268 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 269 rp->rcb_laddr = &COMPATNAME(route_info).ri_src; 270 rp->rcb_faddr = &COMPATNAME(route_info).ri_dst; 271 rp->rcb_filter = COMPATNAME(route_filter); 272 } 273 splx(s); 274 275 if (error) { 276 kmem_free(rop, sizeof(*rop)); 277 so->so_pcb = NULL; 278 return error; 279 } 280 281 soisconnected(so); 282 so->so_options |= SO_USELOOPBACK; 283 KASSERT(solocked(so)); 284 285 return error; 286 } 287 288 static void 289 COMPATNAME(route_detach)(struct socket *so) 290 { 291 struct rawcb *rp = sotorawcb(so); 292 int s; 293 294 KASSERT(rp != NULL); 295 KASSERT(solocked(so)); 296 297 s = splsoftnet(); 298 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 299 raw_detach(so); 300 splx(s); 301 } 302 303 static int 304 COMPATNAME(route_accept)(struct socket *so, struct sockaddr *nam) 305 { 306 KASSERT(solocked(so)); 307 308 panic("route_accept"); 309 310 return EOPNOTSUPP; 311 } 312 313 static int 314 COMPATNAME(route_bind)(struct socket *so, struct sockaddr *nam, struct lwp *l) 315 { 316 KASSERT(solocked(so)); 317 318 return EOPNOTSUPP; 319 } 320 321 static int 322 COMPATNAME(route_listen)(struct socket *so, struct lwp *l) 323 { 324 KASSERT(solocked(so)); 325 326 return EOPNOTSUPP; 327 } 328 329 static int 330 COMPATNAME(route_connect)(struct socket *so, struct sockaddr *nam, struct lwp *l) 331 { 332 KASSERT(solocked(so)); 333 334 return EOPNOTSUPP; 335 } 336 337 static int 338 COMPATNAME(route_connect2)(struct socket *so, struct socket *so2) 339 { 340 KASSERT(solocked(so)); 341 342 return EOPNOTSUPP; 343 } 344 345 static int 346 COMPATNAME(route_disconnect)(struct socket *so) 347 { 348 struct rawcb *rp = sotorawcb(so); 349 int s; 350 351 KASSERT(solocked(so)); 352 KASSERT(rp != NULL); 353 354 s = splsoftnet(); 355 soisdisconnected(so); 356 raw_disconnect(rp); 357 splx(s); 358 359 return 0; 360 } 361 362 static int 363 COMPATNAME(route_shutdown)(struct socket *so) 364 { 365 int s; 366 367 KASSERT(solocked(so)); 368 369 /* 370 * Mark the connection as being incapable of further input. 371 */ 372 s = splsoftnet(); 373 socantsendmore(so); 374 splx(s); 375 return 0; 376 } 377 378 static int 379 COMPATNAME(route_abort)(struct socket *so) 380 { 381 KASSERT(solocked(so)); 382 383 panic("route_abort"); 384 385 return EOPNOTSUPP; 386 } 387 388 static int 389 COMPATNAME(route_ioctl)(struct socket *so, u_long cmd, void *nam, 390 struct ifnet * ifp) 391 { 392 return EOPNOTSUPP; 393 } 394 395 static int 396 COMPATNAME(route_stat)(struct socket *so, struct stat *ub) 397 { 398 KASSERT(solocked(so)); 399 400 return 0; 401 } 402 403 static int 404 COMPATNAME(route_peeraddr)(struct socket *so, struct sockaddr *nam) 405 { 406 struct rawcb *rp = sotorawcb(so); 407 408 KASSERT(solocked(so)); 409 KASSERT(rp != NULL); 410 KASSERT(nam != NULL); 411 412 if (rp->rcb_faddr == NULL) 413 return ENOTCONN; 414 415 raw_setpeeraddr(rp, nam); 416 return 0; 417 } 418 419 static int 420 COMPATNAME(route_sockaddr)(struct socket *so, struct sockaddr *nam) 421 { 422 struct rawcb *rp = sotorawcb(so); 423 424 KASSERT(solocked(so)); 425 KASSERT(rp != NULL); 426 KASSERT(nam != NULL); 427 428 if (rp->rcb_faddr == NULL) 429 return ENOTCONN; 430 431 raw_setsockaddr(rp, nam); 432 return 0; 433 } 434 435 static int 436 COMPATNAME(route_rcvd)(struct socket *so, int flags, struct lwp *l) 437 { 438 KASSERT(solocked(so)); 439 440 return EOPNOTSUPP; 441 } 442 443 static int 444 COMPATNAME(route_recvoob)(struct socket *so, struct mbuf *m, int flags) 445 { 446 KASSERT(solocked(so)); 447 448 return EOPNOTSUPP; 449 } 450 451 static int 452 COMPATNAME(route_send)(struct socket *so, struct mbuf *m, 453 struct sockaddr *nam, struct mbuf *control, struct lwp *l) 454 { 455 int error = 0; 456 int s; 457 458 KASSERT(solocked(so)); 459 KASSERT(so->so_proto == &COMPATNAME(route_protosw)[0]); 460 461 s = splsoftnet(); 462 error = raw_send(so, m, nam, control, l, &COMPATNAME(route_output)); 463 splx(s); 464 465 return error; 466 } 467 468 static int 469 COMPATNAME(route_sendoob)(struct socket *so, struct mbuf *m, 470 struct mbuf *control) 471 { 472 KASSERT(solocked(so)); 473 474 m_freem(m); 475 m_freem(control); 476 477 return EOPNOTSUPP; 478 } 479 static int 480 COMPATNAME(route_purgeif)(struct socket *so, struct ifnet *ifp) 481 { 482 483 panic("route_purgeif"); 484 485 return EOPNOTSUPP; 486 } 487 488 #if defined(INET) || defined(INET6) 489 static int 490 route_get_sdl_index(struct rt_addrinfo *info, int *sdl_index) 491 { 492 struct rtentry *nrt; 493 int error; 494 495 error = rtrequest1(RTM_GET, info, &nrt); 496 if (error != 0) 497 return error; 498 /* 499 * nrt->rt_ifp->if_index may not be correct 500 * due to changing to ifplo0. 501 */ 502 *sdl_index = satosdl(nrt->rt_gateway)->sdl_index; 503 rt_unref(nrt); 504 505 return 0; 506 } 507 #endif 508 509 static void 510 route_get_sdl(const struct ifnet *ifp, const struct sockaddr *dst, 511 struct sockaddr_dl *sdl, int *flags) 512 { 513 struct llentry *la; 514 515 KASSERT(ifp != NULL); 516 517 IF_AFDATA_RLOCK(ifp); 518 switch (dst->sa_family) { 519 case AF_INET: 520 la = lla_lookup(LLTABLE(ifp), 0, dst); 521 break; 522 case AF_INET6: 523 la = lla_lookup(LLTABLE6(ifp), 0, dst); 524 break; 525 default: 526 la = NULL; 527 KASSERTMSG(0, "Invalid AF=%d\n", dst->sa_family); 528 break; 529 } 530 IF_AFDATA_RUNLOCK(ifp); 531 532 void *a = (LLE_IS_VALID(la) && (la->la_flags & LLE_VALID) == LLE_VALID) 533 ? &la->ll_addr : NULL; 534 535 a = sockaddr_dl_init(sdl, sizeof(*sdl), ifp->if_index, ifp->if_type, 536 NULL, 0, a, ifp->if_addrlen); 537 KASSERT(a != NULL); 538 539 if (la != NULL) { 540 *flags = la->la_flags; 541 LLE_RUNLOCK(la); 542 } 543 } 544 545 static int 546 route_output_report(struct rtentry *rt, struct rt_addrinfo *info, 547 struct rt_xmsghdr *rtm, struct rt_xmsghdr **new_rtm) 548 { 549 int len, error; 550 551 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 552 const struct ifaddr *rtifa; 553 const struct ifnet *ifp = rt->rt_ifp; 554 555 info->rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 556 /* rtifa used to be simply rt->rt_ifa. 557 * If rt->rt_ifa != NULL, then 558 * rt_get_ifa() != NULL. So this 559 * ought to still be safe. --dyoung 560 */ 561 rtifa = rt_get_ifa(rt); 562 info->rti_info[RTAX_IFA] = rtifa->ifa_addr; 563 #ifdef RTSOCK_DEBUG 564 if (info->rti_info[RTAX_IFA]->sa_family == AF_INET) { 565 char ibuf[INET_ADDRSTRLEN]; 566 char abuf[INET_ADDRSTRLEN]; 567 printf("%s: copying out RTAX_IFA %s " 568 "for info->rti_info[RTAX_DST] %s " 569 "ifa_getifa %p ifa_seqno %p\n", 570 __func__, 571 RT_IN_PRINT(info, ibuf, RTAX_IFA), 572 RT_IN_PRINT(info, abuf, RTAX_DST), 573 (void *)rtifa->ifa_getifa, 574 rtifa->ifa_seqno); 575 } 576 #endif /* RTSOCK_DEBUG */ 577 if (ifp->if_flags & IFF_POINTOPOINT) 578 info->rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 579 else 580 info->rti_info[RTAX_BRD] = NULL; 581 rtm->rtm_index = ifp->if_index; 582 } 583 error = rt_msg2(rtm->rtm_type, info, NULL, NULL, &len); 584 if (error) 585 return error; 586 if (len > rtm->rtm_msglen) { 587 struct rt_xmsghdr *old_rtm = rtm; 588 R_Malloc(*new_rtm, struct rt_xmsghdr *, len); 589 if (*new_rtm == NULL) 590 return ENOBUFS; 591 (void)memcpy(*new_rtm, old_rtm, old_rtm->rtm_msglen); 592 rtm = *new_rtm; 593 } 594 (void)rt_msg2(rtm->rtm_type, info, rtm, NULL, 0); 595 rtm->rtm_flags = rt->rt_flags; 596 rtm_setmetrics(rt, rtm); 597 rtm->rtm_addrs = info->rti_addrs; 598 599 return 0; 600 } 601 602 /*ARGSUSED*/ 603 int 604 COMPATNAME(route_output)(struct mbuf *m, struct socket *so) 605 { 606 struct sockproto proto = { .sp_family = PF_XROUTE, }; 607 struct rt_xmsghdr *rtm = NULL; 608 struct rt_xmsghdr *old_rtm = NULL, *new_rtm = NULL; 609 struct rtentry *rt = NULL; 610 struct rtentry *saved_nrt = NULL; 611 struct rt_addrinfo info; 612 int len, error = 0; 613 sa_family_t family; 614 struct sockaddr_dl sdl; 615 int bound = curlwp_bind(); 616 bool do_rt_free = false; 617 struct sockaddr_storage netmask; 618 619 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 620 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 621 (m = m_pullup(m, sizeof(int32_t))) == NULL)) { 622 error = ENOBUFS; 623 goto out; 624 } 625 if ((m->m_flags & M_PKTHDR) == 0) 626 panic("%s", __func__); 627 len = m->m_pkthdr.len; 628 if (len < sizeof(*rtm) || 629 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 630 info.rti_info[RTAX_DST] = NULL; 631 senderr(EINVAL); 632 } 633 R_Malloc(rtm, struct rt_xmsghdr *, len); 634 if (rtm == NULL) { 635 info.rti_info[RTAX_DST] = NULL; 636 senderr(ENOBUFS); 637 } 638 m_copydata(m, 0, len, rtm); 639 if (rtm->rtm_version != RTM_XVERSION) { 640 info.rti_info[RTAX_DST] = NULL; 641 senderr(EPROTONOSUPPORT); 642 } 643 rtm->rtm_pid = curproc->p_pid; 644 memset(&info, 0, sizeof(info)); 645 info.rti_addrs = rtm->rtm_addrs; 646 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 647 &info)) { 648 senderr(EINVAL); 649 } 650 info.rti_flags = rtm->rtm_flags; 651 #ifdef RTSOCK_DEBUG 652 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 653 char abuf[INET_ADDRSTRLEN]; 654 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 655 RT_IN_PRINT(&info, abuf, RTAX_DST)); 656 } 657 #endif /* RTSOCK_DEBUG */ 658 if (info.rti_info[RTAX_DST] == NULL || 659 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 660 senderr(EINVAL); 661 } 662 if (info.rti_info[RTAX_GATEWAY] != NULL && 663 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 664 senderr(EINVAL); 665 } 666 667 /* 668 * Verify that the caller has the appropriate privilege; RTM_GET 669 * is the only operation the non-superuser is allowed. 670 */ 671 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 672 0, rtm, NULL, NULL) != 0) 673 senderr(EACCES); 674 675 /* 676 * route(8) passes a sockaddr truncated with prefixlen. 677 * The kernel doesn't expect such sockaddr and need to 678 * use a buffer that is big enough for the sockaddr expected 679 * (padded with 0's). We keep the original length of the sockaddr. 680 */ 681 if (info.rti_info[RTAX_NETMASK]) { 682 /* 683 * Use the family of RTAX_DST, because RTAX_NETMASK 684 * can have a zero family if it comes from the radix 685 * tree via rt_mask(). 686 */ 687 socklen_t sa_len = sockaddr_getsize_by_family( 688 info.rti_info[RTAX_DST]->sa_family); 689 socklen_t masklen = sockaddr_getlen( 690 info.rti_info[RTAX_NETMASK]); 691 if (sa_len != 0 && sa_len > masklen) { 692 KASSERT(sa_len <= sizeof(netmask)); 693 memcpy(&netmask, info.rti_info[RTAX_NETMASK], masklen); 694 memset((char *)&netmask + masklen, 0, sa_len - masklen); 695 info.rti_info[RTAX_NETMASK] = sstocsa(&netmask); 696 } 697 } 698 699 switch (rtm->rtm_type) { 700 701 case RTM_ADD: 702 if (info.rti_info[RTAX_GATEWAY] == NULL) { 703 senderr(EINVAL); 704 } 705 #if defined(INET) || defined(INET6) 706 /* support for new ARP/NDP code with keeping backcompat */ 707 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { 708 const struct sockaddr_dl *sdlp = 709 satocsdl(info.rti_info[RTAX_GATEWAY]); 710 711 /* Allow routing requests by interface index */ 712 if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 713 && sdlp->sdl_slen == 0) 714 goto fallback; 715 /* 716 * Old arp binaries don't set the sdl_index 717 * so we have to complement it. 718 */ 719 int sdl_index = sdlp->sdl_index; 720 if (sdl_index == 0) { 721 error = route_get_sdl_index(&info, &sdl_index); 722 if (error != 0) 723 goto fallback; 724 } else if ( 725 info.rti_info[RTAX_DST]->sa_family == AF_INET) { 726 /* 727 * XXX workaround for SIN_PROXY case; proxy arp 728 * entry should be in an interface that has 729 * a network route including the destination, 730 * not a local (link) route that may not be a 731 * desired place, for example a tap. 732 */ 733 const struct sockaddr_inarp *sina = 734 (const struct sockaddr_inarp *) 735 info.rti_info[RTAX_DST]; 736 if (sina->sin_other & SIN_PROXY) { 737 error = route_get_sdl_index(&info, 738 &sdl_index); 739 if (error != 0) 740 goto fallback; 741 } 742 } 743 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 744 rtm->rtm_rmx.rmx_expire, &info, sdl_index); 745 break; 746 } 747 fallback: 748 #endif /* defined(INET) || defined(INET6) */ 749 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 750 if (error == 0) { 751 _rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 752 rt_unref(saved_nrt); 753 } 754 break; 755 756 case RTM_DELETE: 757 #if defined(INET) || defined(INET6) 758 /* support for new ARP/NDP code */ 759 if (info.rti_info[RTAX_GATEWAY] && 760 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 761 (rtm->rtm_flags & RTF_LLDATA) != 0) { 762 const struct sockaddr_dl *sdlp = 763 satocsdl(info.rti_info[RTAX_GATEWAY]); 764 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 765 rtm->rtm_rmx.rmx_expire, &info, sdlp->sdl_index); 766 rtm->rtm_flags &= ~RTF_UP; 767 break; 768 } 769 #endif 770 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 771 if (error != 0) 772 break; 773 774 rt = saved_nrt; 775 do_rt_free = true; 776 info.rti_info[RTAX_DST] = rt_getkey(rt); 777 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 778 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 779 info.rti_info[RTAX_TAG] = rt_gettag(rt); 780 error = route_output_report(rt, &info, rtm, &new_rtm); 781 if (error) 782 senderr(error); 783 if (new_rtm != NULL) { 784 old_rtm = rtm; 785 rtm = new_rtm; 786 } 787 break; 788 789 case RTM_GET: 790 case RTM_CHANGE: 791 case RTM_LOCK: 792 /* XXX This will mask info.rti_info[RTAX_DST] with 793 * info.rti_info[RTAX_NETMASK] before 794 * searching. It did not used to do that. --dyoung 795 */ 796 rt = NULL; 797 error = rtrequest1(RTM_GET, &info, &rt); 798 if (error != 0) 799 senderr(error); 800 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 801 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 802 info.rti_info[RTAX_DST]->sa_len) != 0) 803 senderr(ESRCH); 804 if (info.rti_info[RTAX_NETMASK] == NULL && 805 rt_mask(rt) != NULL) 806 senderr(ETOOMANYREFS); 807 } 808 809 /* 810 * XXX if arp/ndp requests an L2 entry, we have to obtain 811 * it from lltable while for the route command we have to 812 * return a route as it is. How to distinguish them? 813 * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp 814 * indicates an L2 entry is requested. For old arp/ndp 815 * binaries, we check RTF_UP flag is NOT set; it works 816 * by the fact that arp/ndp don't set it while the route 817 * command sets it. 818 */ 819 if (((rtm->rtm_flags & RTF_LLDATA) != 0 || 820 (rtm->rtm_flags & RTF_UP) == 0) && 821 rtm->rtm_type == RTM_GET && 822 sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { 823 int ll_flags = 0; 824 route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, 825 &ll_flags); 826 info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); 827 error = route_output_report(rt, &info, rtm, &new_rtm); 828 if (error) 829 senderr(error); 830 if (new_rtm != NULL) { 831 old_rtm = rtm; 832 rtm = new_rtm; 833 } 834 rtm->rtm_flags |= RTF_LLDATA; 835 rtm->rtm_flags &= ~RTF_CONNECTED; 836 rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; 837 break; 838 } 839 840 switch (rtm->rtm_type) { 841 case RTM_GET: 842 info.rti_info[RTAX_DST] = rt_getkey(rt); 843 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 844 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 845 info.rti_info[RTAX_TAG] = rt_gettag(rt); 846 error = route_output_report(rt, &info, rtm, &new_rtm); 847 if (error) 848 senderr(error); 849 if (new_rtm != NULL) { 850 old_rtm = rtm; 851 rtm = new_rtm; 852 } 853 break; 854 855 case RTM_CHANGE: 856 #ifdef NET_MPSAFE 857 /* 858 * Release rt_so_mtx to avoid a deadlock with route_intr 859 * and also serialize updating routes to avoid another. 860 */ 861 if (rt_updating) { 862 /* Release to allow the updater to proceed */ 863 rt_unref(rt); 864 rt = NULL; 865 } 866 while (rt_updating) { 867 error = cv_wait_sig(&rt_update_cv, rt_so_mtx); 868 if (error != 0) 869 goto flush; 870 } 871 if (rt == NULL) { 872 error = rtrequest1(RTM_GET, &info, &rt); 873 if (error != 0) 874 goto flush; 875 } 876 rt_updating = true; 877 mutex_exit(rt_so_mtx); 878 879 error = rt_update_prepare(rt); 880 if (error == 0) { 881 error = rt_update(rt, &info, rtm); 882 rt_update_finish(rt); 883 } 884 885 mutex_enter(rt_so_mtx); 886 rt_updating = false; 887 cv_broadcast(&rt_update_cv); 888 #else 889 error = rt_update(rt, &info, rtm); 890 #endif 891 if (error != 0) 892 goto flush; 893 /*FALLTHROUGH*/ 894 case RTM_LOCK: 895 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 896 rt->rt_rmx.rmx_locks |= 897 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 898 break; 899 } 900 break; 901 902 default: 903 senderr(EOPNOTSUPP); 904 } 905 906 flush: 907 if (rtm) { 908 if (error) 909 rtm->rtm_errno = error; 910 else 911 rtm->rtm_flags |= RTF_DONE; 912 } 913 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 914 0; 915 /* We cannot free old_rtm until we have stopped using the 916 * pointers in info, some of which may point to sockaddrs 917 * in old_rtm. 918 */ 919 if (old_rtm != NULL) 920 Free(old_rtm); 921 if (rt) { 922 if (do_rt_free) { 923 #ifdef NET_MPSAFE 924 /* 925 * Release rt_so_mtx to avoid a deadlock with 926 * route_intr. 927 */ 928 mutex_exit(rt_so_mtx); 929 rt_free(rt); 930 mutex_enter(rt_so_mtx); 931 #else 932 rt_free(rt); 933 #endif 934 } else 935 rt_unref(rt); 936 } 937 { 938 struct rawcb *rp = NULL; 939 /* 940 * Check to see if we don't want our own messages. 941 */ 942 if ((so->so_options & SO_USELOOPBACK) == 0) { 943 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 944 if (rtm) 945 Free(rtm); 946 m_freem(m); 947 goto out; 948 } 949 /* There is another listener, so construct message */ 950 rp = sotorawcb(so); 951 } 952 if (rtm) { 953 m_copyback(m, 0, rtm->rtm_msglen, rtm); 954 if (m->m_pkthdr.len < rtm->rtm_msglen) { 955 m_freem(m); 956 m = NULL; 957 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 958 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 959 Free(rtm); 960 } 961 if (rp) 962 rp->rcb_proto.sp_family = 0; /* Avoid us */ 963 if (family) 964 proto.sp_protocol = family; 965 if (m) 966 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 967 &COMPATNAME(route_info).ri_dst, &rt_rawcb); 968 if (rp) 969 rp->rcb_proto.sp_family = PF_XROUTE; 970 } 971 out: 972 curlwp_bindx(bound); 973 return error; 974 } 975 976 static int 977 route_ctloutput(int op, struct socket *so, struct sockopt *sopt) 978 { 979 struct routecb *rop = sotoroutecb(so); 980 int error = 0; 981 unsigned char *rtm_type; 982 size_t len; 983 unsigned int msgfilter; 984 985 KASSERT(solocked(so)); 986 987 if (sopt->sopt_level != AF_ROUTE) { 988 error = ENOPROTOOPT; 989 } else switch (op) { 990 case PRCO_SETOPT: 991 switch (sopt->sopt_name) { 992 case RO_MSGFILTER: 993 msgfilter = 0; 994 for (rtm_type = sopt->sopt_data, len = sopt->sopt_size; 995 len != 0; 996 rtm_type++, len -= sizeof(*rtm_type)) 997 { 998 /* Guard against overflowing our storage. */ 999 if (*rtm_type >= sizeof(msgfilter) * CHAR_BIT) { 1000 error = EOVERFLOW; 1001 break; 1002 } 1003 msgfilter |= RTMSGFILTER(*rtm_type); 1004 } 1005 if (error == 0) 1006 rop->rocb_msgfilter = msgfilter; 1007 break; 1008 default: 1009 error = ENOPROTOOPT; 1010 break; 1011 } 1012 break; 1013 case PRCO_GETOPT: 1014 switch (sopt->sopt_name) { 1015 case RO_MSGFILTER: 1016 error = ENOTSUP; 1017 break; 1018 default: 1019 error = ENOPROTOOPT; 1020 break; 1021 } 1022 } 1023 return error; 1024 } 1025 1026 static void 1027 _rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 1028 { 1029 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 1030 metric(RTV_RPIPE, rmx_recvpipe); 1031 metric(RTV_SPIPE, rmx_sendpipe); 1032 metric(RTV_SSTHRESH, rmx_ssthresh); 1033 metric(RTV_RTT, rmx_rtt); 1034 metric(RTV_RTTVAR, rmx_rttvar); 1035 metric(RTV_HOPCOUNT, rmx_hopcount); 1036 metric(RTV_MTU, rmx_mtu); 1037 #undef metric 1038 if (which & RTV_EXPIRE) { 1039 out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? 1040 time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; 1041 } 1042 } 1043 1044 static void 1045 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 1046 { 1047 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 1048 metric(rmx_recvpipe); 1049 metric(rmx_sendpipe); 1050 metric(rmx_ssthresh); 1051 metric(rmx_rtt); 1052 metric(rmx_rttvar); 1053 metric(rmx_hopcount); 1054 metric(rmx_mtu); 1055 metric(rmx_locks); 1056 #undef metric 1057 out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? 1058 time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; 1059 } 1060 1061 static int 1062 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 1063 struct rt_addrinfo *rtinfo) 1064 { 1065 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 1066 int i; 1067 1068 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 1069 if ((rtinfo->rti_addrs & (1 << i)) == 0) 1070 continue; 1071 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 1072 RT_XADVANCE(cp, sa); 1073 } 1074 1075 /* 1076 * Check for extra addresses specified, except RTM_GET asking 1077 * for interface info. 1078 */ 1079 if (rtmtype == RTM_GET) { 1080 if (((rtinfo->rti_addrs & 1081 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0U << i)) != 0) 1082 return 1; 1083 } else if ((rtinfo->rti_addrs & (~0U << i)) != 0) 1084 return 1; 1085 /* Check for bad data length. */ 1086 if (cp != cplim) { 1087 if (i == RTAX_NETMASK + 1 && sa != NULL && 1088 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 1089 /* 1090 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 1091 * We accept this for now for the sake of old 1092 * binaries or third party softwares. 1093 */ 1094 ; 1095 else 1096 return 1; 1097 } 1098 return 0; 1099 } 1100 1101 static int 1102 rt_getlen(int type) 1103 { 1104 RTS_CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 1105 RTS_CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 1106 RTS_CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 1107 RTS_CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 1108 1109 switch (type) { 1110 case RTM_ODELADDR: 1111 case RTM_ONEWADDR: 1112 case RTM_OCHGADDR: 1113 if (rtsock_iflist_70_hook.hooked) 1114 return sizeof(struct ifa_msghdr70); 1115 else { 1116 #ifdef RTSOCK_DEBUG 1117 printf("%s: unsupported RTM type %d\n", __func__, type); 1118 #endif 1119 return -1; 1120 } 1121 1122 case RTM_DELADDR: 1123 case RTM_NEWADDR: 1124 case RTM_CHGADDR: 1125 return sizeof(struct ifa_xmsghdr); 1126 1127 case RTM_OOIFINFO: 1128 if (rtsock_iflist_14_hook.hooked) 1129 return sizeof(struct if_msghdr14); 1130 else { 1131 #ifdef RTSOCK_DEBUG 1132 printf("%s: unsupported RTM type RTM_OOIFINFO\n", 1133 __func__); 1134 #endif 1135 return -1; 1136 } 1137 1138 case RTM_OIFINFO: 1139 if (rtsock_iflist_50_hook.hooked) 1140 return sizeof(struct if_msghdr50); 1141 else { 1142 #ifdef RTSOCK_DEBUG 1143 printf("%s: unsupported RTM type RTM_OIFINFO\n", 1144 __func__); 1145 #endif 1146 return -1; 1147 } 1148 1149 case RTM_IFINFO: 1150 return sizeof(struct if_xmsghdr); 1151 1152 case RTM_IFANNOUNCE: 1153 case RTM_IEEE80211: 1154 return sizeof(struct if_xannouncemsghdr); 1155 1156 default: 1157 return sizeof(struct rt_xmsghdr); 1158 } 1159 } 1160 1161 1162 struct mbuf * 1163 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 1164 { 1165 struct rt_xmsghdr *rtm; 1166 struct mbuf *m; 1167 int i; 1168 const struct sockaddr *sa; 1169 int len, dlen; 1170 1171 m = m_gethdr(M_DONTWAIT, MT_DATA); 1172 if (m == NULL) 1173 return m; 1174 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 1175 1176 if ((len = rt_getlen(type)) == -1) 1177 goto out; 1178 if (len > MHLEN + MLEN) 1179 panic("%s: message too long", __func__); 1180 else if (len > MHLEN) { 1181 m->m_next = m_get(M_DONTWAIT, MT_DATA); 1182 if (m->m_next == NULL) 1183 goto out; 1184 MCLAIM(m->m_next, m->m_owner); 1185 m->m_pkthdr.len = len; 1186 m->m_len = MHLEN; 1187 m->m_next->m_len = len - MHLEN; 1188 } else { 1189 m->m_pkthdr.len = m->m_len = len; 1190 } 1191 m_reset_rcvif(m); 1192 m_copyback(m, 0, datalen, data); 1193 if (len > datalen) 1194 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 1195 rtm = mtod(m, struct rt_xmsghdr *); 1196 for (i = 0; i < RTAX_MAX; i++) { 1197 if ((sa = rtinfo->rti_info[i]) == NULL) 1198 continue; 1199 rtinfo->rti_addrs |= (1 << i); 1200 dlen = RT_XROUNDUP(sa->sa_len); 1201 m_copyback(m, len, sa->sa_len, sa); 1202 if (dlen != sa->sa_len) { 1203 /* 1204 * Up to 7 + 1 nul's since roundup is to 1205 * sizeof(uint64_t) (8 bytes) 1206 */ 1207 m_copyback(m, len + sa->sa_len, 1208 dlen - sa->sa_len, "\0\0\0\0\0\0\0"); 1209 } 1210 len += dlen; 1211 } 1212 if (m->m_pkthdr.len != len) 1213 goto out; 1214 rtm->rtm_msglen = len; 1215 rtm->rtm_version = RTM_XVERSION; 1216 rtm->rtm_type = type; 1217 return m; 1218 out: 1219 m_freem(m); 1220 return NULL; 1221 } 1222 1223 /* 1224 * rt_msg2 1225 * 1226 * fills 'cp' or 'w'.w_tmem with the routing socket message and 1227 * returns the length of the message in 'lenp'. 1228 * 1229 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 1230 * the message 1231 * otherwise walkarg's w_needed is updated and if the user buffer is 1232 * specified and w_needed indicates space exists the information is copied 1233 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 1234 * if the allocation fails ENOBUFS is returned. 1235 */ 1236 static int 1237 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1238 int *lenp) 1239 { 1240 int i; 1241 int len, dlen, second_time = 0; 1242 char *cp0, *cp = cpv; 1243 1244 rtinfo->rti_addrs = 0; 1245 again: 1246 if ((len = rt_getlen(type)) == -1) 1247 return EINVAL; 1248 1249 if ((cp0 = cp) != NULL) 1250 cp += len; 1251 for (i = 0; i < RTAX_MAX; i++) { 1252 const struct sockaddr *sa; 1253 1254 if ((sa = rtinfo->rti_info[i]) == NULL) 1255 continue; 1256 rtinfo->rti_addrs |= (1 << i); 1257 dlen = RT_XROUNDUP(sa->sa_len); 1258 if (cp) { 1259 int diff = dlen - sa->sa_len; 1260 (void)memcpy(cp, sa, (size_t)sa->sa_len); 1261 cp += sa->sa_len; 1262 if (diff > 0) { 1263 (void)memset(cp, 0, (size_t)diff); 1264 cp += diff; 1265 } 1266 } 1267 len += dlen; 1268 } 1269 if (cp == NULL && w != NULL && !second_time) { 1270 struct rt_walkarg *rw = w; 1271 1272 rw->w_needed += len; 1273 if (rw->w_needed <= 0 && rw->w_where) { 1274 if (rw->w_tmemsize < len) { 1275 if (rw->w_tmem) 1276 kmem_free(rw->w_tmem, rw->w_tmemsize); 1277 rw->w_tmem = kmem_zalloc(len, KM_SLEEP); 1278 rw->w_tmemsize = len; 1279 } 1280 if (rw->w_tmem) { 1281 cp = rw->w_tmem; 1282 second_time = 1; 1283 goto again; 1284 } else { 1285 rw->w_tmemneeded = len; 1286 return ENOBUFS; 1287 } 1288 } 1289 } 1290 if (cp) { 1291 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 1292 1293 rtm->rtm_version = RTM_XVERSION; 1294 rtm->rtm_type = type; 1295 rtm->rtm_msglen = len; 1296 } 1297 if (lenp) 1298 *lenp = len; 1299 return 0; 1300 } 1301 1302 /* 1303 * This routine is called to generate a message from the routing 1304 * socket indicating that a redirect has occurred, a routing lookup 1305 * has failed, or that a protocol has detected timeouts to a particular 1306 * destination. 1307 */ 1308 void 1309 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 1310 int error) 1311 { 1312 struct rt_xmsghdr rtm; 1313 struct mbuf *m; 1314 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1315 struct rt_addrinfo info = *rtinfo; 1316 1317 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 1318 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1319 return; 1320 memset(&rtm, 0, sizeof(rtm)); 1321 rtm.rtm_pid = curproc->p_pid; 1322 rtm.rtm_flags = RTF_DONE | flags; 1323 rtm.rtm_errno = error; 1324 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 1325 if (m == NULL) 1326 return; 1327 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1328 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1329 } 1330 1331 /* 1332 * This routine is called to generate a message from the routing 1333 * socket indicating that the status of a network interface has changed. 1334 */ 1335 void 1336 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1337 { 1338 struct if_xmsghdr ifm; 1339 struct mbuf *m; 1340 struct rt_addrinfo info; 1341 1342 COMPATCALL(rt_ifmsg, (ifp)); 1343 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1344 return; 1345 (void)memset(&info, 0, sizeof(info)); 1346 (void)memset(&ifm, 0, sizeof(ifm)); 1347 ifm.ifm_index = ifp->if_index; 1348 ifm.ifm_flags = ifp->if_flags; 1349 ifm.ifm_data = ifp->if_data; 1350 ifm.ifm_addrs = 0; 1351 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1352 if (m == NULL) 1353 return; 1354 COMPATNAME(route_enqueue)(m, 0); 1355 MODULE_HOOK_CALL_VOID(rtsock_oifmsg_14_hook, (ifp), __nothing); 1356 MODULE_HOOK_CALL_VOID(rtsock_oifmsg_50_hook, (ifp), __nothing); 1357 } 1358 1359 /* 1360 * This is called to generate messages from the routing socket 1361 * indicating a network interface has had addresses associated with it. 1362 * if we ever reverse the logic and replace messages TO the routing 1363 * socket indicate a request to configure interfaces, then it will 1364 * be unnecessary as the routing socket will automatically generate 1365 * copies of it. 1366 */ 1367 static void 1368 COMPATNAME(rt_addrmsg0)(int cmd, struct ifaddr *ifa, int error, 1369 struct rtentry *rt, const struct sockaddr *src) 1370 { 1371 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1372 struct rt_addrinfo info; 1373 const struct sockaddr *sa; 1374 int pass; 1375 struct mbuf *m; 1376 struct ifnet *ifp; 1377 struct rt_xmsghdr rtm; 1378 struct ifa_xmsghdr ifam; 1379 int ncmd; 1380 1381 KASSERT(ifa != NULL); 1382 KASSERT(ifa->ifa_addr != NULL); 1383 ifp = ifa->ifa_ifp; 1384 if (cmd == RTM_ADD && vec_sctp_add_ip_address != NULL) { 1385 (*vec_sctp_add_ip_address)(ifa); 1386 } else if (cmd == RTM_DELETE && vec_sctp_delete_ip_address != NULL) { 1387 (*vec_sctp_delete_ip_address)(ifa); 1388 } 1389 1390 COMPATCALL(rt_addrmsg_rt, (cmd, ifa, error, rt)); 1391 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1392 return; 1393 for (pass = 1; pass < 3; pass++) { 1394 memset(&info, 0, sizeof(info)); 1395 switch (cmdpass(cmd, pass)) { 1396 case cmdpass(RTM_ADD, 1): 1397 case cmdpass(RTM_CHANGE, 1): 1398 case cmdpass(RTM_DELETE, 2): 1399 case cmdpass(RTM_NEWADDR, 1): 1400 case cmdpass(RTM_DELADDR, 1): 1401 case cmdpass(RTM_CHGADDR, 1): 1402 switch (cmd) { 1403 case RTM_ADD: 1404 ncmd = RTM_XNEWADDR; 1405 break; 1406 case RTM_DELETE: 1407 ncmd = RTM_XDELADDR; 1408 break; 1409 case RTM_CHANGE: 1410 ncmd = RTM_XCHGADDR; 1411 break; 1412 case RTM_NEWADDR: 1413 ncmd = RTM_XNEWADDR; 1414 break; 1415 case RTM_DELADDR: 1416 ncmd = RTM_XDELADDR; 1417 break; 1418 case RTM_CHGADDR: 1419 ncmd = RTM_XCHGADDR; 1420 break; 1421 default: 1422 panic("%s: unknown command %d", __func__, cmd); 1423 } 1424 MODULE_HOOK_CALL_VOID(rtsock_newaddr_70_hook, 1425 (ncmd, ifa), __nothing); 1426 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1427 KASSERT(ifp->if_dl != NULL); 1428 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1429 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1430 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1431 info.rti_info[RTAX_AUTHOR] = src; 1432 memset(&ifam, 0, sizeof(ifam)); 1433 ifam.ifam_index = ifp->if_index; 1434 ifam.ifam_metric = ifa->ifa_metric; 1435 ifam.ifam_flags = ifa->ifa_flags; 1436 #ifndef COMPAT_RTSOCK 1437 ifam.ifam_pid = curproc->p_pid; 1438 ifam.ifam_addrflags = if_addrflags(ifa); 1439 #endif 1440 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1441 if (m == NULL) 1442 continue; 1443 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1444 info.rti_addrs; 1445 break; 1446 case cmdpass(RTM_ADD, 2): 1447 case cmdpass(RTM_CHANGE, 2): 1448 case cmdpass(RTM_DELETE, 1): 1449 if (rt == NULL) 1450 continue; 1451 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1452 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1453 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1454 memset(&rtm, 0, sizeof(rtm)); 1455 rtm.rtm_pid = curproc->p_pid; 1456 rtm.rtm_index = ifp->if_index; 1457 rtm.rtm_flags |= rt->rt_flags; 1458 rtm.rtm_errno = error; 1459 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1460 if (m == NULL) 1461 continue; 1462 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1463 break; 1464 default: 1465 continue; 1466 } 1467 KASSERTMSG(m != NULL, "called with wrong command"); 1468 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1469 } 1470 #undef cmdpass 1471 } 1472 1473 void 1474 COMPATNAME(rt_addrmsg)(int cmd, struct ifaddr *ifa) 1475 { 1476 1477 COMPATNAME(rt_addrmsg0)(cmd, ifa, 0, NULL, NULL); 1478 } 1479 1480 void 1481 COMPATNAME(rt_addrmsg_rt)(int cmd, struct ifaddr *ifa, int error, 1482 struct rtentry *rt) 1483 { 1484 1485 COMPATNAME(rt_addrmsg0)(cmd, ifa, error, rt, NULL); 1486 } 1487 1488 void 1489 COMPATNAME(rt_addrmsg_src)(int cmd, struct ifaddr *ifa, 1490 const struct sockaddr *src) 1491 { 1492 1493 COMPATNAME(rt_addrmsg0)(cmd, ifa, 0, NULL, src); 1494 } 1495 1496 static struct mbuf * 1497 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1498 struct rt_addrinfo *info) 1499 { 1500 struct if_xannouncemsghdr ifan; 1501 1502 memset(info, 0, sizeof(*info)); 1503 memset(&ifan, 0, sizeof(ifan)); 1504 ifan.ifan_index = ifp->if_index; 1505 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1506 ifan.ifan_what = what; 1507 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1508 } 1509 1510 /* 1511 * This is called to generate routing socket messages indicating 1512 * network interface arrival and departure. 1513 */ 1514 void 1515 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1516 { 1517 struct mbuf *m; 1518 struct rt_addrinfo info; 1519 1520 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1521 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1522 return; 1523 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1524 if (m == NULL) 1525 return; 1526 COMPATNAME(route_enqueue)(m, 0); 1527 } 1528 1529 /* 1530 * This is called to generate routing socket messages indicating 1531 * IEEE80211 wireless events. 1532 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1533 */ 1534 void 1535 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1536 size_t data_len) 1537 { 1538 struct mbuf *m; 1539 struct rt_addrinfo info; 1540 1541 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1542 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1543 return; 1544 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1545 if (m == NULL) 1546 return; 1547 /* 1548 * Append the ieee80211 data. Try to stick it in the 1549 * mbuf containing the ifannounce msg; otherwise allocate 1550 * a new mbuf and append. 1551 * 1552 * NB: we assume m is a single mbuf. 1553 */ 1554 if (data_len > M_TRAILINGSPACE(m)) { 1555 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1556 if (n == NULL) { 1557 m_freem(m); 1558 return; 1559 } 1560 (void)memcpy(mtod(n, void *), data, data_len); 1561 n->m_len = data_len; 1562 m->m_next = n; 1563 } else if (data_len > 0) { 1564 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1565 m->m_len += data_len; 1566 } 1567 if (m->m_flags & M_PKTHDR) 1568 m->m_pkthdr.len += data_len; 1569 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1570 COMPATNAME(route_enqueue)(m, 0); 1571 } 1572 1573 /* 1574 * Routing message software interrupt routine 1575 */ 1576 static void 1577 COMPATNAME(route_intr)(void *cookie) 1578 { 1579 struct sockproto proto = { .sp_family = PF_XROUTE, }; 1580 struct route_info * const ri = &COMPATNAME(route_info); 1581 struct mbuf *m; 1582 1583 SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE(); 1584 for (;;) { 1585 IFQ_LOCK(&ri->ri_intrq); 1586 IF_DEQUEUE(&ri->ri_intrq, m); 1587 IFQ_UNLOCK(&ri->ri_intrq); 1588 if (m == NULL) 1589 break; 1590 proto.sp_protocol = M_GETCTX(m, uintptr_t); 1591 #ifdef NET_MPSAFE 1592 mutex_enter(rt_so_mtx); 1593 #endif 1594 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst, &rt_rawcb); 1595 #ifdef NET_MPSAFE 1596 mutex_exit(rt_so_mtx); 1597 #endif 1598 } 1599 SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); 1600 } 1601 1602 /* 1603 * Enqueue a message to the software interrupt routine. 1604 */ 1605 void 1606 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 1607 { 1608 struct route_info * const ri = &COMPATNAME(route_info); 1609 int wasempty; 1610 1611 IFQ_LOCK(&ri->ri_intrq); 1612 if (IF_QFULL(&ri->ri_intrq)) { 1613 printf("%s: queue full, dropped message\n", __func__); 1614 IF_DROP(&ri->ri_intrq); 1615 IFQ_UNLOCK(&ri->ri_intrq); 1616 m_freem(m); 1617 } else { 1618 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 1619 M_SETCTX(m, (uintptr_t)family); 1620 IF_ENQUEUE(&ri->ri_intrq, m); 1621 IFQ_UNLOCK(&ri->ri_intrq); 1622 if (wasempty) { 1623 kpreempt_disable(); 1624 softint_schedule(ri->ri_sih); 1625 kpreempt_enable(); 1626 } 1627 } 1628 } 1629 1630 static void 1631 COMPATNAME(route_init)(void) 1632 { 1633 struct route_info * const ri = &COMPATNAME(route_info); 1634 1635 #ifndef COMPAT_RTSOCK 1636 rt_init(); 1637 #ifdef NET_MPSAFE 1638 rt_so_mtx = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE); 1639 1640 cv_init(&rt_update_cv, "rtsock_cv"); 1641 #endif 1642 1643 sysctl_net_route_setup(NULL, PF_ROUTE, "rtable"); 1644 #endif 1645 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 1646 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 1647 COMPATNAME(route_intr), NULL); 1648 IFQ_LOCK_INIT(&ri->ri_intrq); 1649 } 1650 1651 /* 1652 * Definitions of protocols supported in the ROUTE domain. 1653 */ 1654 #ifndef COMPAT_RTSOCK 1655 PR_WRAP_USRREQS(route); 1656 #else 1657 PR_WRAP_USRREQS(compat_50_route); 1658 #endif 1659 1660 static const struct pr_usrreqs route_usrreqs = { 1661 .pr_attach = COMPATNAME(route_attach_wrapper), 1662 .pr_detach = COMPATNAME(route_detach_wrapper), 1663 .pr_accept = COMPATNAME(route_accept_wrapper), 1664 .pr_bind = COMPATNAME(route_bind_wrapper), 1665 .pr_listen = COMPATNAME(route_listen_wrapper), 1666 .pr_connect = COMPATNAME(route_connect_wrapper), 1667 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 1668 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 1669 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 1670 .pr_abort = COMPATNAME(route_abort_wrapper), 1671 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 1672 .pr_stat = COMPATNAME(route_stat_wrapper), 1673 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 1674 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 1675 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 1676 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 1677 .pr_send = COMPATNAME(route_send_wrapper), 1678 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 1679 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 1680 }; 1681 1682 static const struct protosw COMPATNAME(route_protosw)[] = { 1683 { 1684 .pr_type = SOCK_RAW, 1685 .pr_domain = &COMPATNAME(routedomain), 1686 .pr_flags = PR_ATOMIC|PR_ADDR, 1687 .pr_ctlinput = raw_ctlinput, 1688 .pr_ctloutput = route_ctloutput, 1689 .pr_usrreqs = &route_usrreqs, 1690 .pr_init = rt_pr_init, 1691 }, 1692 }; 1693 1694 struct domain COMPATNAME(routedomain) = { 1695 .dom_family = PF_XROUTE, 1696 .dom_name = DOMAINNAME, 1697 .dom_init = COMPATNAME(route_init), 1698 .dom_protosw = COMPATNAME(route_protosw), 1699 .dom_protoswNPROTOSW = 1700 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 1701 }; 1702