rtsock.c revision 1.238
1 /* $NetBSD: rtsock.c,v 1.238 2018/01/25 03:09:05 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 1.238 2018/01/25 03:09:05 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 #include "opt_net_mpsafe.h" 72 #endif 73 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/proc.h> 77 #include <sys/socket.h> 78 #include <sys/socketvar.h> 79 #include <sys/domain.h> 80 #include <sys/protosw.h> 81 #include <sys/sysctl.h> 82 #include <sys/kauth.h> 83 #include <sys/kmem.h> 84 #include <sys/intr.h> 85 #include <sys/condvar.h> 86 87 #include <net/if.h> 88 #include <net/if_llatbl.h> 89 #include <net/if_types.h> 90 #include <net/route.h> 91 #include <net/raw_cb.h> 92 93 #include <netinet/in_var.h> 94 #include <netinet/if_inarp.h> 95 96 #include <netmpls/mpls.h> 97 98 #ifdef SCTP 99 extern void sctp_add_ip_address(struct ifaddr *); 100 extern void sctp_delete_ip_address(struct ifaddr *); 101 #endif 102 103 #if defined(COMPAT_14) || defined(COMPAT_50) || defined(COMPAT_70) 104 #include <compat/net/if.h> 105 #include <compat/net/route.h> 106 #endif 107 #ifdef COMPAT_RTSOCK 108 #define RTM_XVERSION RTM_OVERSION 109 #define RTM_XNEWADDR RTM_ONEWADDR 110 #define RTM_XDELADDR RTM_ODELADDR 111 #define RTM_XCHGADDR RTM_OCHGADDR 112 #define RT_XADVANCE(a,b) RT_OADVANCE(a,b) 113 #define RT_XROUNDUP(n) RT_OROUNDUP(n) 114 #define PF_XROUTE PF_OROUTE 115 #define rt_xmsghdr rt_msghdr50 116 #define if_xmsghdr if_msghdr /* if_msghdr50 is for RTM_OIFINFO */ 117 #define ifa_xmsghdr ifa_msghdr50 118 #define if_xannouncemsghdr if_announcemsghdr50 119 #define COMPATNAME(x) compat_50_ ## x 120 #define DOMAINNAME "oroute" 121 CTASSERT(sizeof(struct ifa_xmsghdr) == 20); 122 DOMAIN_DEFINE(compat_50_routedomain); /* forward declare and add to link set */ 123 #undef COMPAT_70 124 #else /* COMPAT_RTSOCK */ 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 CTASSERT(sizeof(struct ifa_xmsghdr) == 32); 139 #ifdef COMPAT_50 140 #define COMPATCALL(name, args) compat_50_ ## name args 141 #endif 142 DOMAIN_DEFINE(routedomain); /* forward declare and add to link set */ 143 #undef COMPAT_50 144 #undef COMPAT_14 145 #endif /* COMPAT_RTSOCK */ 146 147 #ifndef COMPATCALL 148 #define COMPATCALL(name, args) do { } while (/*CONSTCOND*/ 0) 149 #endif 150 151 #ifdef RTSOCK_DEBUG 152 #define RT_IN_PRINT(info, b, a) (in_print((b), sizeof(b), \ 153 &((const struct sockaddr_in *)(info)->rti_info[(a)])->sin_addr), (b)) 154 #endif /* RTSOCK_DEBUG */ 155 156 struct route_info COMPATNAME(route_info) = { 157 .ri_dst = { .sa_len = 2, .sa_family = PF_XROUTE, }, 158 .ri_src = { .sa_len = 2, .sa_family = PF_XROUTE, }, 159 .ri_maxqlen = IFQ_MAXLEN, 160 }; 161 162 #define PRESERVED_RTF (RTF_UP | RTF_GATEWAY | RTF_HOST | RTF_DONE | RTF_MASK) 163 164 static void COMPATNAME(route_init)(void); 165 static int COMPATNAME(route_output)(struct mbuf *, struct socket *); 166 167 static int rt_xaddrs(u_char, const char *, const char *, struct rt_addrinfo *); 168 static struct mbuf *rt_makeifannouncemsg(struct ifnet *, int, int, 169 struct rt_addrinfo *); 170 static int rt_msg2(int, struct rt_addrinfo *, void *, struct rt_walkarg *, int *); 171 static void rt_setmetrics(int, const struct rt_xmsghdr *, struct rtentry *); 172 static void rtm_setmetrics(const struct rtentry *, struct rt_xmsghdr *); 173 static void sysctl_net_route_setup(struct sysctllog **); 174 static int sysctl_dumpentry(struct rtentry *, void *); 175 static int sysctl_iflist(int, struct rt_walkarg *, int); 176 static int sysctl_rtable(SYSCTLFN_PROTO); 177 static void rt_adjustcount(int, int); 178 179 static const struct protosw COMPATNAME(route_protosw)[]; 180 181 struct routecb { 182 struct rawcb rocb_rcb; 183 unsigned int rocb_msgfilter; 184 #define RTMSGFILTER(m) (1U << (m)) 185 }; 186 #define sotoroutecb(so) ((struct routecb *)(so)->so_pcb) 187 188 static struct rawcbhead rt_rawcb; 189 #ifdef NET_MPSAFE 190 static kmutex_t *rt_so_mtx; 191 192 static bool rt_updating = false; 193 static kcondvar_t rt_update_cv; 194 #endif 195 196 static void 197 rt_adjustcount(int af, int cnt) 198 { 199 struct route_cb * const cb = &COMPATNAME(route_info).ri_cb; 200 201 cb->any_count += cnt; 202 203 switch (af) { 204 case AF_INET: 205 cb->ip_count += cnt; 206 return; 207 #ifdef INET6 208 case AF_INET6: 209 cb->ip6_count += cnt; 210 return; 211 #endif 212 case AF_MPLS: 213 cb->mpls_count += cnt; 214 return; 215 } 216 } 217 218 static int 219 COMPATNAME(route_filter)(struct mbuf *m, struct sockproto *proto, 220 struct rawcb *rp) 221 { 222 struct routecb *rop = (struct routecb *)rp; 223 struct rt_xmsghdr *rtm; 224 225 KASSERT(m != NULL); 226 KASSERT(proto != NULL); 227 KASSERT(rp != NULL); 228 229 /* Wrong family for this socket. */ 230 if (proto->sp_family != PF_ROUTE) 231 return ENOPROTOOPT; 232 233 /* If no filter set, just return. */ 234 if (rop->rocb_msgfilter == 0) 235 return 0; 236 237 /* Ensure we can access rtm_type */ 238 if (m->m_len < 239 offsetof(struct rt_xmsghdr, rtm_type) + sizeof(rtm->rtm_type)) 240 return EINVAL; 241 242 rtm = mtod(m, struct rt_xmsghdr *); 243 /* If the rtm type is filtered out, return a positive. */ 244 if (!(rop->rocb_msgfilter & RTMSGFILTER(rtm->rtm_type))) 245 return EEXIST; 246 247 /* Passed the filter. */ 248 return 0; 249 } 250 251 static void 252 rt_pr_init(void) 253 { 254 255 LIST_INIT(&rt_rawcb); 256 } 257 258 static int 259 COMPATNAME(route_attach)(struct socket *so, int proto) 260 { 261 struct rawcb *rp; 262 struct routecb *rop; 263 int s, error; 264 265 KASSERT(sotorawcb(so) == NULL); 266 rop = kmem_zalloc(sizeof(*rop), KM_SLEEP); 267 rp = &rop->rocb_rcb; 268 rp->rcb_len = sizeof(*rop); 269 so->so_pcb = rp; 270 271 s = splsoftnet(); 272 273 #ifdef NET_MPSAFE 274 KASSERT(so->so_lock == NULL); 275 mutex_obj_hold(rt_so_mtx); 276 so->so_lock = rt_so_mtx; 277 solock(so); 278 #endif 279 280 if ((error = raw_attach(so, proto, &rt_rawcb)) == 0) { 281 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 282 rp->rcb_laddr = &COMPATNAME(route_info).ri_src; 283 rp->rcb_faddr = &COMPATNAME(route_info).ri_dst; 284 rp->rcb_filter = COMPATNAME(route_filter); 285 } 286 splx(s); 287 288 if (error) { 289 kmem_free(rop, sizeof(*rop)); 290 so->so_pcb = NULL; 291 return error; 292 } 293 294 soisconnected(so); 295 so->so_options |= SO_USELOOPBACK; 296 KASSERT(solocked(so)); 297 298 return error; 299 } 300 301 static void 302 COMPATNAME(route_detach)(struct socket *so) 303 { 304 struct rawcb *rp = sotorawcb(so); 305 int s; 306 307 KASSERT(rp != NULL); 308 KASSERT(solocked(so)); 309 310 s = splsoftnet(); 311 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 312 raw_detach(so); 313 splx(s); 314 } 315 316 static int 317 COMPATNAME(route_accept)(struct socket *so, struct sockaddr *nam) 318 { 319 KASSERT(solocked(so)); 320 321 panic("route_accept"); 322 323 return EOPNOTSUPP; 324 } 325 326 static int 327 COMPATNAME(route_bind)(struct socket *so, struct sockaddr *nam, struct lwp *l) 328 { 329 KASSERT(solocked(so)); 330 331 return EOPNOTSUPP; 332 } 333 334 static int 335 COMPATNAME(route_listen)(struct socket *so, struct lwp *l) 336 { 337 KASSERT(solocked(so)); 338 339 return EOPNOTSUPP; 340 } 341 342 static int 343 COMPATNAME(route_connect)(struct socket *so, struct sockaddr *nam, struct lwp *l) 344 { 345 KASSERT(solocked(so)); 346 347 return EOPNOTSUPP; 348 } 349 350 static int 351 COMPATNAME(route_connect2)(struct socket *so, struct socket *so2) 352 { 353 KASSERT(solocked(so)); 354 355 return EOPNOTSUPP; 356 } 357 358 static int 359 COMPATNAME(route_disconnect)(struct socket *so) 360 { 361 struct rawcb *rp = sotorawcb(so); 362 int s; 363 364 KASSERT(solocked(so)); 365 KASSERT(rp != NULL); 366 367 s = splsoftnet(); 368 soisdisconnected(so); 369 raw_disconnect(rp); 370 splx(s); 371 372 return 0; 373 } 374 375 static int 376 COMPATNAME(route_shutdown)(struct socket *so) 377 { 378 int s; 379 380 KASSERT(solocked(so)); 381 382 /* 383 * Mark the connection as being incapable of further input. 384 */ 385 s = splsoftnet(); 386 socantsendmore(so); 387 splx(s); 388 return 0; 389 } 390 391 static int 392 COMPATNAME(route_abort)(struct socket *so) 393 { 394 KASSERT(solocked(so)); 395 396 panic("route_abort"); 397 398 return EOPNOTSUPP; 399 } 400 401 static int 402 COMPATNAME(route_ioctl)(struct socket *so, u_long cmd, void *nam, 403 struct ifnet * ifp) 404 { 405 return EOPNOTSUPP; 406 } 407 408 static int 409 COMPATNAME(route_stat)(struct socket *so, struct stat *ub) 410 { 411 KASSERT(solocked(so)); 412 413 return 0; 414 } 415 416 static int 417 COMPATNAME(route_peeraddr)(struct socket *so, struct sockaddr *nam) 418 { 419 struct rawcb *rp = sotorawcb(so); 420 421 KASSERT(solocked(so)); 422 KASSERT(rp != NULL); 423 KASSERT(nam != NULL); 424 425 if (rp->rcb_faddr == NULL) 426 return ENOTCONN; 427 428 raw_setpeeraddr(rp, nam); 429 return 0; 430 } 431 432 static int 433 COMPATNAME(route_sockaddr)(struct socket *so, struct sockaddr *nam) 434 { 435 struct rawcb *rp = sotorawcb(so); 436 437 KASSERT(solocked(so)); 438 KASSERT(rp != NULL); 439 KASSERT(nam != NULL); 440 441 if (rp->rcb_faddr == NULL) 442 return ENOTCONN; 443 444 raw_setsockaddr(rp, nam); 445 return 0; 446 } 447 448 static int 449 COMPATNAME(route_rcvd)(struct socket *so, int flags, struct lwp *l) 450 { 451 KASSERT(solocked(so)); 452 453 return EOPNOTSUPP; 454 } 455 456 static int 457 COMPATNAME(route_recvoob)(struct socket *so, struct mbuf *m, int flags) 458 { 459 KASSERT(solocked(so)); 460 461 return EOPNOTSUPP; 462 } 463 464 static int 465 COMPATNAME(route_send)(struct socket *so, struct mbuf *m, 466 struct sockaddr *nam, struct mbuf *control, struct lwp *l) 467 { 468 int error = 0; 469 int s; 470 471 KASSERT(solocked(so)); 472 KASSERT(so->so_proto == &COMPATNAME(route_protosw)[0]); 473 474 s = splsoftnet(); 475 error = raw_send(so, m, nam, control, l, &COMPATNAME(route_output)); 476 splx(s); 477 478 return error; 479 } 480 481 static int 482 COMPATNAME(route_sendoob)(struct socket *so, struct mbuf *m, 483 struct mbuf *control) 484 { 485 KASSERT(solocked(so)); 486 487 m_freem(m); 488 m_freem(control); 489 490 return EOPNOTSUPP; 491 } 492 static int 493 COMPATNAME(route_purgeif)(struct socket *so, struct ifnet *ifp) 494 { 495 496 panic("route_purgeif"); 497 498 return EOPNOTSUPP; 499 } 500 501 #if defined(INET) || defined(INET6) 502 static int 503 route_get_sdl_index(struct rt_addrinfo *info, int *sdl_index) 504 { 505 struct rtentry *nrt; 506 int error; 507 508 error = rtrequest1(RTM_GET, info, &nrt); 509 if (error != 0) 510 return error; 511 /* 512 * nrt->rt_ifp->if_index may not be correct 513 * due to changing to ifplo0. 514 */ 515 *sdl_index = satosdl(nrt->rt_gateway)->sdl_index; 516 rt_unref(nrt); 517 518 return 0; 519 } 520 #endif 521 522 static void 523 route_get_sdl(const struct ifnet *ifp, const struct sockaddr *dst, 524 struct sockaddr_dl *sdl, int *flags) 525 { 526 struct llentry *la; 527 528 KASSERT(ifp != NULL); 529 530 IF_AFDATA_RLOCK(ifp); 531 switch (dst->sa_family) { 532 case AF_INET: 533 la = lla_lookup(LLTABLE(ifp), 0, dst); 534 break; 535 case AF_INET6: 536 la = lla_lookup(LLTABLE6(ifp), 0, dst); 537 break; 538 default: 539 la = NULL; 540 KASSERTMSG(0, "Invalid AF=%d\n", dst->sa_family); 541 break; 542 } 543 IF_AFDATA_RUNLOCK(ifp); 544 545 void *a = (LLE_IS_VALID(la) && (la->la_flags & LLE_VALID) == LLE_VALID) 546 ? &la->ll_addr : NULL; 547 548 a = sockaddr_dl_init(sdl, sizeof(*sdl), ifp->if_index, ifp->if_type, 549 NULL, 0, a, ifp->if_addrlen); 550 KASSERT(a != NULL); 551 552 if (la != NULL) { 553 *flags = la->la_flags; 554 LLE_RUNLOCK(la); 555 } 556 } 557 558 static int 559 route_output_report(struct rtentry *rt, struct rt_addrinfo *info, 560 struct rt_xmsghdr *rtm, struct rt_xmsghdr **new_rtm) 561 { 562 int len; 563 564 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 565 const struct ifaddr *rtifa; 566 const struct ifnet *ifp = rt->rt_ifp; 567 568 info->rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 569 /* rtifa used to be simply rt->rt_ifa. 570 * If rt->rt_ifa != NULL, then 571 * rt_get_ifa() != NULL. So this 572 * ought to still be safe. --dyoung 573 */ 574 rtifa = rt_get_ifa(rt); 575 info->rti_info[RTAX_IFA] = rtifa->ifa_addr; 576 #ifdef RTSOCK_DEBUG 577 if (info->rti_info[RTAX_IFA]->sa_family == AF_INET) { 578 char ibuf[INET_ADDRSTRLEN]; 579 char abuf[INET_ADDRSTRLEN]; 580 printf("%s: copying out RTAX_IFA %s " 581 "for info->rti_info[RTAX_DST] %s " 582 "ifa_getifa %p ifa_seqno %p\n", 583 __func__, 584 RT_IN_PRINT(info, ibuf, RTAX_IFA), 585 RT_IN_PRINT(info, abuf, RTAX_DST), 586 (void *)rtifa->ifa_getifa, 587 rtifa->ifa_seqno); 588 } 589 #endif /* RTSOCK_DEBUG */ 590 if (ifp->if_flags & IFF_POINTOPOINT) 591 info->rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 592 else 593 info->rti_info[RTAX_BRD] = NULL; 594 rtm->rtm_index = ifp->if_index; 595 } 596 (void)rt_msg2(rtm->rtm_type, info, NULL, NULL, &len); 597 if (len > rtm->rtm_msglen) { 598 struct rt_xmsghdr *old_rtm = rtm; 599 R_Malloc(*new_rtm, struct rt_xmsghdr *, len); 600 if (*new_rtm == NULL) 601 return ENOBUFS; 602 (void)memcpy(*new_rtm, old_rtm, old_rtm->rtm_msglen); 603 rtm = *new_rtm; 604 } 605 (void)rt_msg2(rtm->rtm_type, info, rtm, NULL, 0); 606 rtm->rtm_flags = rt->rt_flags; 607 rtm_setmetrics(rt, rtm); 608 rtm->rtm_addrs = info->rti_addrs; 609 610 return 0; 611 } 612 613 static struct ifaddr * 614 route_output_get_ifa(const struct rt_addrinfo info, const struct rtentry *rt, 615 struct ifnet **ifp, struct psref *psref_ifp, struct psref *psref) 616 { 617 struct ifaddr *ifa = NULL; 618 619 *ifp = NULL; 620 if (info.rti_info[RTAX_IFP] != NULL) { 621 ifa = ifa_ifwithnet_psref(info.rti_info[RTAX_IFP], psref); 622 if (ifa == NULL) 623 goto next; 624 *ifp = ifa->ifa_ifp; 625 if_acquire(*ifp, psref_ifp); 626 if (info.rti_info[RTAX_IFA] == NULL && 627 info.rti_info[RTAX_GATEWAY] == NULL) 628 goto next; 629 ifa_release(ifa, psref); 630 if (info.rti_info[RTAX_IFA] == NULL) { 631 /* route change <dst> <gw> -ifp <if> */ 632 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_GATEWAY], 633 *ifp, psref); 634 } else { 635 /* route change <dst> -ifp <if> -ifa <addr> */ 636 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 637 if (ifa != NULL) 638 goto out; 639 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_IFA], 640 *ifp, psref); 641 } 642 goto out; 643 } 644 next: 645 if (info.rti_info[RTAX_IFA] != NULL) { 646 /* route change <dst> <gw> -ifa <addr> */ 647 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 648 if (ifa != NULL) 649 goto out; 650 } 651 if (info.rti_info[RTAX_GATEWAY] != NULL) { 652 /* route change <dst> <gw> */ 653 ifa = ifa_ifwithroute_psref(rt->rt_flags, rt_getkey(rt), 654 info.rti_info[RTAX_GATEWAY], psref); 655 } 656 out: 657 if (ifa != NULL && *ifp == NULL) { 658 *ifp = ifa->ifa_ifp; 659 if_acquire(*ifp, psref_ifp); 660 } 661 if (ifa == NULL && *ifp != NULL) { 662 if_put(*ifp, psref_ifp); 663 *ifp = NULL; 664 } 665 return ifa; 666 } 667 668 static int 669 route_output_change(struct rtentry *rt, struct rt_addrinfo *info, 670 struct rt_xmsghdr *rtm) 671 { 672 int error = 0; 673 struct ifnet *ifp = NULL, *new_ifp = NULL; 674 struct ifaddr *ifa = NULL, *new_ifa; 675 struct psref psref_ifa, psref_new_ifa, psref_ifp, psref_new_ifp; 676 bool newgw, ifp_changed = false; 677 678 /* 679 * New gateway could require new ifaddr, ifp; 680 * flags may also be different; ifp may be specified 681 * by ll sockaddr when protocol address is ambiguous 682 */ 683 newgw = info->rti_info[RTAX_GATEWAY] != NULL && 684 sockaddr_cmp(info->rti_info[RTAX_GATEWAY], rt->rt_gateway) != 0; 685 686 if (newgw || info->rti_info[RTAX_IFP] != NULL || 687 info->rti_info[RTAX_IFA] != NULL) { 688 ifp = rt_getifp(info, &psref_ifp); 689 /* info refers ifp so we need to keep a reference */ 690 ifa = rt_getifa(info, &psref_ifa); 691 if (ifa == NULL) { 692 error = ENETUNREACH; 693 goto out; 694 } 695 } 696 if (newgw) { 697 error = rt_setgate(rt, info->rti_info[RTAX_GATEWAY]); 698 if (error != 0) 699 goto out; 700 } 701 if (info->rti_info[RTAX_TAG]) { 702 const struct sockaddr *tag; 703 tag = rt_settag(rt, info->rti_info[RTAX_TAG]); 704 if (tag == NULL) { 705 error = ENOBUFS; 706 goto out; 707 } 708 } 709 /* 710 * New gateway could require new ifaddr, ifp; 711 * flags may also be different; ifp may be specified 712 * by ll sockaddr when protocol address is ambiguous 713 */ 714 new_ifa = route_output_get_ifa(*info, rt, &new_ifp, &psref_new_ifp, 715 &psref_new_ifa); 716 if (new_ifa != NULL) { 717 ifa_release(ifa, &psref_ifa); 718 ifa = new_ifa; 719 } 720 if (ifa) { 721 struct ifaddr *oifa = rt->rt_ifa; 722 if (oifa != ifa && !ifa_is_destroying(ifa) && 723 new_ifp != NULL && !if_is_deactivated(new_ifp)) { 724 if (oifa && oifa->ifa_rtrequest) 725 oifa->ifa_rtrequest(RTM_DELETE, rt, info); 726 rt_replace_ifa(rt, ifa); 727 rt->rt_ifp = new_ifp; 728 ifp_changed = true; 729 } 730 if (new_ifa == NULL) 731 ifa_release(ifa, &psref_ifa); 732 } 733 ifa_release(new_ifa, &psref_new_ifa); 734 if (new_ifp && rt->rt_ifp != new_ifp && !if_is_deactivated(new_ifp)) { 735 rt->rt_ifp = new_ifp; 736 ifp_changed = true; 737 } 738 rt_setmetrics(rtm->rtm_inits, rtm, rt); 739 if (rt->rt_flags != info->rti_flags) { 740 rt->rt_flags = (info->rti_flags & ~PRESERVED_RTF) | 741 (rt->rt_flags & PRESERVED_RTF); 742 } 743 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 744 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info); 745 #if defined(INET) || defined(INET6) 746 if (ifp_changed && rt_mask(rt) != NULL) 747 lltable_prefix_free(rt_getkey(rt)->sa_family, rt_getkey(rt), 748 rt_mask(rt), 0); 749 #else 750 (void)ifp_changed; /* XXX gcc */ 751 #endif 752 out: 753 if_put(new_ifp, &psref_new_ifp); 754 if_put(ifp, &psref_ifp); 755 756 return error; 757 } 758 759 /*ARGSUSED*/ 760 int 761 COMPATNAME(route_output)(struct mbuf *m, struct socket *so) 762 { 763 struct sockproto proto = { .sp_family = PF_XROUTE, }; 764 struct rt_xmsghdr *rtm = NULL; 765 struct rt_xmsghdr *old_rtm = NULL, *new_rtm = NULL; 766 struct rtentry *rt = NULL; 767 struct rtentry *saved_nrt = NULL; 768 struct rt_addrinfo info; 769 int len, error = 0; 770 sa_family_t family; 771 struct sockaddr_dl sdl; 772 int bound = curlwp_bind(); 773 bool do_rt_free = false; 774 struct sockaddr_storage netmask; 775 776 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 777 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 778 (m = m_pullup(m, sizeof(int32_t))) == NULL)) { 779 error = ENOBUFS; 780 goto out; 781 } 782 if ((m->m_flags & M_PKTHDR) == 0) 783 panic("%s", __func__); 784 len = m->m_pkthdr.len; 785 if (len < sizeof(*rtm) || 786 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 787 info.rti_info[RTAX_DST] = NULL; 788 senderr(EINVAL); 789 } 790 R_Malloc(rtm, struct rt_xmsghdr *, len); 791 if (rtm == NULL) { 792 info.rti_info[RTAX_DST] = NULL; 793 senderr(ENOBUFS); 794 } 795 m_copydata(m, 0, len, rtm); 796 if (rtm->rtm_version != RTM_XVERSION) { 797 info.rti_info[RTAX_DST] = NULL; 798 senderr(EPROTONOSUPPORT); 799 } 800 rtm->rtm_pid = curproc->p_pid; 801 memset(&info, 0, sizeof(info)); 802 info.rti_addrs = rtm->rtm_addrs; 803 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 804 &info)) { 805 senderr(EINVAL); 806 } 807 info.rti_flags = rtm->rtm_flags; 808 #ifdef RTSOCK_DEBUG 809 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 810 char abuf[INET_ADDRSTRLEN]; 811 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 812 RT_IN_PRINT(&info, abuf, RTAX_DST)); 813 } 814 #endif /* RTSOCK_DEBUG */ 815 if (info.rti_info[RTAX_DST] == NULL || 816 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 817 senderr(EINVAL); 818 } 819 if (info.rti_info[RTAX_GATEWAY] != NULL && 820 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 821 senderr(EINVAL); 822 } 823 824 /* 825 * Verify that the caller has the appropriate privilege; RTM_GET 826 * is the only operation the non-superuser is allowed. 827 */ 828 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 829 0, rtm, NULL, NULL) != 0) 830 senderr(EACCES); 831 832 /* 833 * route(8) passes a sockaddr truncated with prefixlen. 834 * The kernel doesn't expect such sockaddr and need to 835 * use a buffer that is big enough for the sockaddr expected 836 * (padded with 0's). We keep the original length of the sockaddr. 837 */ 838 if (info.rti_info[RTAX_NETMASK]) { 839 /* 840 * Use the family of RTAX_DST, because RTAX_NETMASK 841 * can have a zero family if it comes from the radix 842 * tree via rt_mask(). 843 */ 844 socklen_t sa_len = sockaddr_getsize_by_family( 845 info.rti_info[RTAX_DST]->sa_family); 846 socklen_t masklen = sockaddr_getlen( 847 info.rti_info[RTAX_NETMASK]); 848 if (sa_len != 0 && sa_len > masklen) { 849 KASSERT(sa_len <= sizeof(netmask)); 850 memcpy(&netmask, info.rti_info[RTAX_NETMASK], masklen); 851 memset((char *)&netmask + masklen, 0, sa_len - masklen); 852 info.rti_info[RTAX_NETMASK] = sstocsa(&netmask); 853 } 854 } 855 856 switch (rtm->rtm_type) { 857 858 case RTM_ADD: 859 if (info.rti_info[RTAX_GATEWAY] == NULL) { 860 senderr(EINVAL); 861 } 862 #if defined(INET) || defined(INET6) 863 /* support for new ARP/NDP code with keeping backcompat */ 864 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { 865 const struct sockaddr_dl *sdlp = 866 satocsdl(info.rti_info[RTAX_GATEWAY]); 867 868 /* Allow routing requests by interface index */ 869 if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 870 && sdlp->sdl_slen == 0) 871 goto fallback; 872 /* 873 * Old arp binaries don't set the sdl_index 874 * so we have to complement it. 875 */ 876 int sdl_index = sdlp->sdl_index; 877 if (sdl_index == 0) { 878 error = route_get_sdl_index(&info, &sdl_index); 879 if (error != 0) 880 goto fallback; 881 } else if ( 882 info.rti_info[RTAX_DST]->sa_family == AF_INET) { 883 /* 884 * XXX workaround for SIN_PROXY case; proxy arp 885 * entry should be in an interface that has 886 * a network route including the destination, 887 * not a local (link) route that may not be a 888 * desired place, for example a tap. 889 */ 890 const struct sockaddr_inarp *sina = 891 (const struct sockaddr_inarp *) 892 info.rti_info[RTAX_DST]; 893 if (sina->sin_other & SIN_PROXY) { 894 error = route_get_sdl_index(&info, 895 &sdl_index); 896 if (error != 0) 897 goto fallback; 898 } 899 } 900 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 901 rtm->rtm_rmx.rmx_expire, &info, sdl_index); 902 break; 903 } 904 fallback: 905 #endif /* defined(INET) || defined(INET6) */ 906 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 907 if (error == 0) { 908 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 909 rt_unref(saved_nrt); 910 } 911 break; 912 913 case RTM_DELETE: 914 #if defined(INET) || defined(INET6) 915 /* support for new ARP/NDP code */ 916 if (info.rti_info[RTAX_GATEWAY] && 917 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 918 (rtm->rtm_flags & RTF_LLDATA) != 0) { 919 const struct sockaddr_dl *sdlp = 920 satocsdl(info.rti_info[RTAX_GATEWAY]); 921 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 922 rtm->rtm_rmx.rmx_expire, &info, sdlp->sdl_index); 923 rtm->rtm_flags &= ~RTF_UP; 924 break; 925 } 926 #endif 927 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 928 if (error != 0) 929 break; 930 931 rt = saved_nrt; 932 do_rt_free = true; 933 info.rti_info[RTAX_DST] = rt_getkey(rt); 934 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 935 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 936 info.rti_info[RTAX_TAG] = rt_gettag(rt); 937 error = route_output_report(rt, &info, rtm, &new_rtm); 938 if (error) 939 senderr(error); 940 if (new_rtm != NULL) { 941 old_rtm = rtm; 942 rtm = new_rtm; 943 } 944 break; 945 946 case RTM_GET: 947 case RTM_CHANGE: 948 case RTM_LOCK: 949 /* XXX This will mask info.rti_info[RTAX_DST] with 950 * info.rti_info[RTAX_NETMASK] before 951 * searching. It did not used to do that. --dyoung 952 */ 953 rt = NULL; 954 error = rtrequest1(RTM_GET, &info, &rt); 955 if (error != 0) 956 senderr(error); 957 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 958 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 959 info.rti_info[RTAX_DST]->sa_len) != 0) 960 senderr(ESRCH); 961 if (info.rti_info[RTAX_NETMASK] == NULL && 962 rt_mask(rt) != NULL) 963 senderr(ETOOMANYREFS); 964 } 965 966 /* 967 * XXX if arp/ndp requests an L2 entry, we have to obtain 968 * it from lltable while for the route command we have to 969 * return a route as it is. How to distinguish them? 970 * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp 971 * indicates an L2 entry is requested. For old arp/ndp 972 * binaries, we check RTF_UP flag is NOT set; it works 973 * by the fact that arp/ndp don't set it while the route 974 * command sets it. 975 */ 976 if (((rtm->rtm_flags & RTF_LLDATA) != 0 || 977 (rtm->rtm_flags & RTF_UP) == 0) && 978 rtm->rtm_type == RTM_GET && 979 sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { 980 int ll_flags = 0; 981 route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, 982 &ll_flags); 983 info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); 984 error = route_output_report(rt, &info, rtm, &new_rtm); 985 if (error) 986 senderr(error); 987 if (new_rtm != NULL) { 988 old_rtm = rtm; 989 rtm = new_rtm; 990 } 991 rtm->rtm_flags |= RTF_LLDATA; 992 rtm->rtm_flags &= ~RTF_CONNECTED; 993 rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; 994 break; 995 } 996 997 switch (rtm->rtm_type) { 998 case RTM_GET: 999 info.rti_info[RTAX_DST] = rt_getkey(rt); 1000 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1001 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1002 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1003 error = route_output_report(rt, &info, rtm, &new_rtm); 1004 if (error) 1005 senderr(error); 1006 if (new_rtm != NULL) { 1007 old_rtm = rtm; 1008 rtm = new_rtm; 1009 } 1010 break; 1011 1012 case RTM_CHANGE: 1013 #ifdef NET_MPSAFE 1014 /* 1015 * Release rt_so_mtx to avoid a deadlock with route_intr 1016 * and also serialize updating routes to avoid another. 1017 */ 1018 if (rt_updating) { 1019 /* Release to allow the updater to proceed */ 1020 rt_unref(rt); 1021 rt = NULL; 1022 } 1023 while (rt_updating) { 1024 error = cv_wait_sig(&rt_update_cv, rt_so_mtx); 1025 if (error != 0) 1026 goto flush; 1027 } 1028 if (rt == NULL) { 1029 error = rtrequest1(RTM_GET, &info, &rt); 1030 if (error != 0) 1031 goto flush; 1032 } 1033 rt_updating = true; 1034 mutex_exit(rt_so_mtx); 1035 1036 error = rt_update_prepare(rt); 1037 if (error == 0) { 1038 error = route_output_change(rt, &info, rtm); 1039 rt_update_finish(rt); 1040 } 1041 1042 mutex_enter(rt_so_mtx); 1043 rt_updating = false; 1044 cv_broadcast(&rt_update_cv); 1045 #else 1046 error = route_output_change(rt, &info, rtm); 1047 #endif 1048 if (error != 0) 1049 goto flush; 1050 /*FALLTHROUGH*/ 1051 case RTM_LOCK: 1052 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 1053 rt->rt_rmx.rmx_locks |= 1054 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 1055 break; 1056 } 1057 break; 1058 1059 default: 1060 senderr(EOPNOTSUPP); 1061 } 1062 1063 flush: 1064 if (rtm) { 1065 if (error) 1066 rtm->rtm_errno = error; 1067 else 1068 rtm->rtm_flags |= RTF_DONE; 1069 } 1070 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 1071 0; 1072 /* We cannot free old_rtm until we have stopped using the 1073 * pointers in info, some of which may point to sockaddrs 1074 * in old_rtm. 1075 */ 1076 if (old_rtm != NULL) 1077 Free(old_rtm); 1078 if (rt) { 1079 if (do_rt_free) 1080 rt_free(rt); 1081 else 1082 rt_unref(rt); 1083 } 1084 { 1085 struct rawcb *rp = NULL; 1086 /* 1087 * Check to see if we don't want our own messages. 1088 */ 1089 if ((so->so_options & SO_USELOOPBACK) == 0) { 1090 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 1091 if (rtm) 1092 Free(rtm); 1093 m_freem(m); 1094 goto out; 1095 } 1096 /* There is another listener, so construct message */ 1097 rp = sotorawcb(so); 1098 } 1099 if (rtm) { 1100 m_copyback(m, 0, rtm->rtm_msglen, rtm); 1101 if (m->m_pkthdr.len < rtm->rtm_msglen) { 1102 m_freem(m); 1103 m = NULL; 1104 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 1105 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 1106 Free(rtm); 1107 } 1108 if (rp) 1109 rp->rcb_proto.sp_family = 0; /* Avoid us */ 1110 if (family) 1111 proto.sp_protocol = family; 1112 if (m) 1113 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 1114 &COMPATNAME(route_info).ri_dst, &rt_rawcb); 1115 if (rp) 1116 rp->rcb_proto.sp_family = PF_XROUTE; 1117 } 1118 out: 1119 curlwp_bindx(bound); 1120 return error; 1121 } 1122 1123 static int 1124 route_ctloutput(int op, struct socket *so, struct sockopt *sopt) 1125 { 1126 struct routecb *rop = sotoroutecb(so); 1127 int error = 0; 1128 unsigned char *rtm_type; 1129 size_t len; 1130 unsigned int msgfilter; 1131 1132 KASSERT(solocked(so)); 1133 1134 if (sopt->sopt_level != AF_ROUTE) { 1135 error = ENOPROTOOPT; 1136 } else switch (op) { 1137 case PRCO_SETOPT: 1138 switch (sopt->sopt_name) { 1139 case RO_MSGFILTER: 1140 msgfilter = 0; 1141 for (rtm_type = sopt->sopt_data, len = sopt->sopt_size; 1142 len != 0; 1143 rtm_type++, len -= sizeof(*rtm_type)) 1144 { 1145 /* Guard against overflowing our storage. */ 1146 if (*rtm_type >= sizeof(msgfilter) * CHAR_BIT) { 1147 error = EOVERFLOW; 1148 break; 1149 } 1150 msgfilter |= RTMSGFILTER(*rtm_type); 1151 } 1152 if (error == 0) 1153 rop->rocb_msgfilter = msgfilter; 1154 break; 1155 default: 1156 error = ENOPROTOOPT; 1157 break; 1158 } 1159 break; 1160 case PRCO_GETOPT: 1161 switch (sopt->sopt_name) { 1162 case RO_MSGFILTER: 1163 error = ENOTSUP; 1164 break; 1165 default: 1166 error = ENOPROTOOPT; 1167 break; 1168 } 1169 } 1170 return error; 1171 } 1172 1173 static void 1174 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 1175 { 1176 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 1177 metric(RTV_RPIPE, rmx_recvpipe); 1178 metric(RTV_SPIPE, rmx_sendpipe); 1179 metric(RTV_SSTHRESH, rmx_ssthresh); 1180 metric(RTV_RTT, rmx_rtt); 1181 metric(RTV_RTTVAR, rmx_rttvar); 1182 metric(RTV_HOPCOUNT, rmx_hopcount); 1183 metric(RTV_MTU, rmx_mtu); 1184 #undef metric 1185 if (which & RTV_EXPIRE) { 1186 out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? 1187 time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; 1188 } 1189 } 1190 1191 static void 1192 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 1193 { 1194 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 1195 metric(rmx_recvpipe); 1196 metric(rmx_sendpipe); 1197 metric(rmx_ssthresh); 1198 metric(rmx_rtt); 1199 metric(rmx_rttvar); 1200 metric(rmx_hopcount); 1201 metric(rmx_mtu); 1202 metric(rmx_locks); 1203 #undef metric 1204 out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? 1205 time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; 1206 } 1207 1208 static int 1209 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 1210 struct rt_addrinfo *rtinfo) 1211 { 1212 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 1213 int i; 1214 1215 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 1216 if ((rtinfo->rti_addrs & (1 << i)) == 0) 1217 continue; 1218 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 1219 RT_XADVANCE(cp, sa); 1220 } 1221 1222 /* 1223 * Check for extra addresses specified, except RTM_GET asking 1224 * for interface info. 1225 */ 1226 if (rtmtype == RTM_GET) { 1227 if (((rtinfo->rti_addrs & 1228 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0U << i)) != 0) 1229 return 1; 1230 } else if ((rtinfo->rti_addrs & (~0U << i)) != 0) 1231 return 1; 1232 /* Check for bad data length. */ 1233 if (cp != cplim) { 1234 if (i == RTAX_NETMASK + 1 && sa != NULL && 1235 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 1236 /* 1237 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 1238 * We accept this for now for the sake of old 1239 * binaries or third party softwares. 1240 */ 1241 ; 1242 else 1243 return 1; 1244 } 1245 return 0; 1246 } 1247 1248 static int 1249 rt_getlen(int type) 1250 { 1251 #ifndef COMPAT_RTSOCK 1252 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 1253 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 1254 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 1255 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 1256 #endif 1257 1258 switch (type) { 1259 case RTM_ODELADDR: 1260 case RTM_ONEWADDR: 1261 case RTM_OCHGADDR: 1262 #ifdef COMPAT_70 1263 return sizeof(struct ifa_msghdr70); 1264 #else 1265 #ifdef RTSOCK_DEBUG 1266 printf("%s: unsupported RTM type %d\n", __func__, type); 1267 #endif 1268 return -1; 1269 #endif 1270 case RTM_DELADDR: 1271 case RTM_NEWADDR: 1272 case RTM_CHGADDR: 1273 return sizeof(struct ifa_xmsghdr); 1274 1275 case RTM_OOIFINFO: 1276 #ifdef COMPAT_14 1277 return sizeof(struct if_msghdr14); 1278 #else 1279 #ifdef RTSOCK_DEBUG 1280 printf("%s: unsupported RTM type RTM_OOIFINFO\n", __func__); 1281 #endif 1282 return -1; 1283 #endif 1284 case RTM_OIFINFO: 1285 #ifdef COMPAT_50 1286 return sizeof(struct if_msghdr50); 1287 #else 1288 #ifdef RTSOCK_DEBUG 1289 printf("%s: unsupported RTM type RTM_OIFINFO\n", __func__); 1290 #endif 1291 return -1; 1292 #endif 1293 1294 case RTM_IFINFO: 1295 return sizeof(struct if_xmsghdr); 1296 1297 case RTM_IFANNOUNCE: 1298 case RTM_IEEE80211: 1299 return sizeof(struct if_xannouncemsghdr); 1300 1301 default: 1302 return sizeof(struct rt_xmsghdr); 1303 } 1304 } 1305 1306 1307 struct mbuf * 1308 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 1309 { 1310 struct rt_xmsghdr *rtm; 1311 struct mbuf *m; 1312 int i; 1313 const struct sockaddr *sa; 1314 int len, dlen; 1315 1316 m = m_gethdr(M_DONTWAIT, MT_DATA); 1317 if (m == NULL) 1318 return m; 1319 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 1320 1321 if ((len = rt_getlen(type)) == -1) 1322 goto out; 1323 if (len > MHLEN + MLEN) 1324 panic("%s: message too long", __func__); 1325 else if (len > MHLEN) { 1326 m->m_next = m_get(M_DONTWAIT, MT_DATA); 1327 if (m->m_next == NULL) 1328 goto out; 1329 MCLAIM(m->m_next, m->m_owner); 1330 m->m_pkthdr.len = len; 1331 m->m_len = MHLEN; 1332 m->m_next->m_len = len - MHLEN; 1333 } else { 1334 m->m_pkthdr.len = m->m_len = len; 1335 } 1336 m_reset_rcvif(m); 1337 m_copyback(m, 0, datalen, data); 1338 if (len > datalen) 1339 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 1340 rtm = mtod(m, struct rt_xmsghdr *); 1341 for (i = 0; i < RTAX_MAX; i++) { 1342 if ((sa = rtinfo->rti_info[i]) == NULL) 1343 continue; 1344 rtinfo->rti_addrs |= (1 << i); 1345 dlen = RT_XROUNDUP(sa->sa_len); 1346 m_copyback(m, len, sa->sa_len, sa); 1347 if (dlen != sa->sa_len) { 1348 /* 1349 * Up to 6 + 1 nul's since roundup is to 1350 * sizeof(uint64_t) (8 bytes) 1351 */ 1352 m_copyback(m, len + sa->sa_len, 1353 dlen - sa->sa_len, "\0\0\0\0\0\0"); 1354 } 1355 len += dlen; 1356 } 1357 if (m->m_pkthdr.len != len) 1358 goto out; 1359 rtm->rtm_msglen = len; 1360 rtm->rtm_version = RTM_XVERSION; 1361 rtm->rtm_type = type; 1362 return m; 1363 out: 1364 m_freem(m); 1365 return NULL; 1366 } 1367 1368 /* 1369 * rt_msg2 1370 * 1371 * fills 'cp' or 'w'.w_tmem with the routing socket message and 1372 * returns the length of the message in 'lenp'. 1373 * 1374 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 1375 * the message 1376 * otherwise walkarg's w_needed is updated and if the user buffer is 1377 * specified and w_needed indicates space exists the information is copied 1378 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 1379 * if the allocation fails ENOBUFS is returned. 1380 */ 1381 static int 1382 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1383 int *lenp) 1384 { 1385 int i; 1386 int len, dlen, second_time = 0; 1387 char *cp0, *cp = cpv; 1388 1389 rtinfo->rti_addrs = 0; 1390 again: 1391 if ((len = rt_getlen(type)) == -1) 1392 return EINVAL; 1393 1394 if ((cp0 = cp) != NULL) 1395 cp += len; 1396 for (i = 0; i < RTAX_MAX; i++) { 1397 const struct sockaddr *sa; 1398 1399 if ((sa = rtinfo->rti_info[i]) == NULL) 1400 continue; 1401 rtinfo->rti_addrs |= (1 << i); 1402 dlen = RT_XROUNDUP(sa->sa_len); 1403 if (cp) { 1404 int diff = dlen - sa->sa_len; 1405 (void)memcpy(cp, sa, (size_t)sa->sa_len); 1406 cp += sa->sa_len; 1407 if (diff > 0) { 1408 (void)memset(cp, 0, (size_t)diff); 1409 cp += diff; 1410 } 1411 } 1412 len += dlen; 1413 } 1414 if (cp == NULL && w != NULL && !second_time) { 1415 struct rt_walkarg *rw = w; 1416 1417 rw->w_needed += len; 1418 if (rw->w_needed <= 0 && rw->w_where) { 1419 if (rw->w_tmemsize < len) { 1420 if (rw->w_tmem) 1421 kmem_free(rw->w_tmem, rw->w_tmemsize); 1422 rw->w_tmem = kmem_alloc(len, KM_SLEEP); 1423 rw->w_tmemsize = len; 1424 } 1425 if (rw->w_tmem) { 1426 cp = rw->w_tmem; 1427 second_time = 1; 1428 goto again; 1429 } else { 1430 rw->w_tmemneeded = len; 1431 return ENOBUFS; 1432 } 1433 } 1434 } 1435 if (cp) { 1436 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 1437 1438 rtm->rtm_version = RTM_XVERSION; 1439 rtm->rtm_type = type; 1440 rtm->rtm_msglen = len; 1441 } 1442 if (lenp) 1443 *lenp = len; 1444 return 0; 1445 } 1446 1447 #ifndef COMPAT_RTSOCK 1448 int 1449 rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1450 int *lenp) 1451 { 1452 return rt_msg2(type, rtinfo, cpv, w, lenp); 1453 } 1454 #endif 1455 1456 /* 1457 * This routine is called to generate a message from the routing 1458 * socket indicating that a redirect has occurred, a routing lookup 1459 * has failed, or that a protocol has detected timeouts to a particular 1460 * destination. 1461 */ 1462 void 1463 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 1464 int error) 1465 { 1466 struct rt_xmsghdr rtm; 1467 struct mbuf *m; 1468 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1469 struct rt_addrinfo info = *rtinfo; 1470 1471 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 1472 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1473 return; 1474 memset(&rtm, 0, sizeof(rtm)); 1475 rtm.rtm_pid = curproc->p_pid; 1476 rtm.rtm_flags = RTF_DONE | flags; 1477 rtm.rtm_errno = error; 1478 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 1479 if (m == NULL) 1480 return; 1481 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1482 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1483 } 1484 1485 /* 1486 * This routine is called to generate a message from the routing 1487 * socket indicating that the status of a network interface has changed. 1488 */ 1489 void 1490 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1491 { 1492 struct if_xmsghdr ifm; 1493 struct mbuf *m; 1494 struct rt_addrinfo info; 1495 1496 COMPATCALL(rt_ifmsg, (ifp)); 1497 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1498 return; 1499 (void)memset(&info, 0, sizeof(info)); 1500 (void)memset(&ifm, 0, sizeof(ifm)); 1501 ifm.ifm_index = ifp->if_index; 1502 ifm.ifm_flags = ifp->if_flags; 1503 ifm.ifm_data = ifp->if_data; 1504 ifm.ifm_addrs = 0; 1505 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1506 if (m == NULL) 1507 return; 1508 COMPATNAME(route_enqueue)(m, 0); 1509 #ifdef COMPAT_14 1510 compat_14_rt_oifmsg(ifp); 1511 #endif 1512 #ifdef COMPAT_50 1513 compat_50_rt_oifmsg(ifp); 1514 #endif 1515 } 1516 1517 #ifndef COMPAT_RTSOCK 1518 static int 1519 if_addrflags(struct ifaddr *ifa) 1520 { 1521 1522 switch (ifa->ifa_addr->sa_family) { 1523 #ifdef INET 1524 case AF_INET: 1525 return ((struct in_ifaddr *)ifa)->ia4_flags; 1526 #endif 1527 #ifdef INET6 1528 case AF_INET6: 1529 return ((struct in6_ifaddr *)ifa)->ia6_flags; 1530 #endif 1531 default: 1532 return 0; 1533 } 1534 } 1535 #endif 1536 1537 /* 1538 * This is called to generate messages from the routing socket 1539 * indicating a network interface has had addresses associated with it. 1540 * if we ever reverse the logic and replace messages TO the routing 1541 * socket indicate a request to configure interfaces, then it will 1542 * be unnecessary as the routing socket will automatically generate 1543 * copies of it. 1544 */ 1545 void 1546 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1547 struct rtentry *rt) 1548 { 1549 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1550 struct rt_addrinfo info; 1551 const struct sockaddr *sa; 1552 int pass; 1553 struct mbuf *m; 1554 struct ifnet *ifp; 1555 struct rt_xmsghdr rtm; 1556 struct ifa_xmsghdr ifam; 1557 int ncmd; 1558 1559 KASSERT(ifa != NULL); 1560 KASSERT(ifa->ifa_addr != NULL); 1561 ifp = ifa->ifa_ifp; 1562 #ifdef SCTP 1563 if (cmd == RTM_ADD) { 1564 sctp_add_ip_address(ifa); 1565 } else if (cmd == RTM_DELETE) { 1566 sctp_delete_ip_address(ifa); 1567 } 1568 #endif 1569 1570 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1571 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1572 return; 1573 for (pass = 1; pass < 3; pass++) { 1574 memset(&info, 0, sizeof(info)); 1575 switch (cmdpass(cmd, pass)) { 1576 case cmdpass(RTM_ADD, 1): 1577 case cmdpass(RTM_CHANGE, 1): 1578 case cmdpass(RTM_DELETE, 2): 1579 case cmdpass(RTM_NEWADDR, 1): 1580 case cmdpass(RTM_DELADDR, 1): 1581 case cmdpass(RTM_CHGADDR, 1): 1582 switch (cmd) { 1583 case RTM_ADD: 1584 ncmd = RTM_XNEWADDR; 1585 break; 1586 case RTM_DELETE: 1587 ncmd = RTM_XDELADDR; 1588 break; 1589 case RTM_CHANGE: 1590 ncmd = RTM_XCHGADDR; 1591 break; 1592 case RTM_NEWADDR: 1593 ncmd = RTM_XNEWADDR; 1594 break; 1595 case RTM_DELADDR: 1596 ncmd = RTM_XDELADDR; 1597 break; 1598 case RTM_CHGADDR: 1599 ncmd = RTM_XCHGADDR; 1600 break; 1601 default: 1602 panic("%s: unknown command %d", __func__, cmd); 1603 } 1604 #ifdef COMPAT_70 1605 compat_70_rt_newaddrmsg1(ncmd, ifa); 1606 #endif 1607 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1608 KASSERT(ifp->if_dl != NULL); 1609 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1610 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1611 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1612 memset(&ifam, 0, sizeof(ifam)); 1613 ifam.ifam_index = ifp->if_index; 1614 ifam.ifam_metric = ifa->ifa_metric; 1615 ifam.ifam_flags = ifa->ifa_flags; 1616 #ifndef COMPAT_RTSOCK 1617 ifam.ifam_pid = curproc->p_pid; 1618 ifam.ifam_addrflags = if_addrflags(ifa); 1619 #endif 1620 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1621 if (m == NULL) 1622 continue; 1623 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1624 info.rti_addrs; 1625 break; 1626 case cmdpass(RTM_ADD, 2): 1627 case cmdpass(RTM_CHANGE, 2): 1628 case cmdpass(RTM_DELETE, 1): 1629 if (rt == NULL) 1630 continue; 1631 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1632 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1633 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1634 memset(&rtm, 0, sizeof(rtm)); 1635 rtm.rtm_pid = curproc->p_pid; 1636 rtm.rtm_index = ifp->if_index; 1637 rtm.rtm_flags |= rt->rt_flags; 1638 rtm.rtm_errno = error; 1639 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1640 if (m == NULL) 1641 continue; 1642 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1643 break; 1644 default: 1645 continue; 1646 } 1647 KASSERTMSG(m != NULL, "called with wrong command"); 1648 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1649 } 1650 #undef cmdpass 1651 1652 } 1653 1654 static struct mbuf * 1655 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1656 struct rt_addrinfo *info) 1657 { 1658 struct if_xannouncemsghdr ifan; 1659 1660 memset(info, 0, sizeof(*info)); 1661 memset(&ifan, 0, sizeof(ifan)); 1662 ifan.ifan_index = ifp->if_index; 1663 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1664 ifan.ifan_what = what; 1665 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1666 } 1667 1668 /* 1669 * This is called to generate routing socket messages indicating 1670 * network interface arrival and departure. 1671 */ 1672 void 1673 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1674 { 1675 struct mbuf *m; 1676 struct rt_addrinfo info; 1677 1678 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1679 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1680 return; 1681 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1682 if (m == NULL) 1683 return; 1684 COMPATNAME(route_enqueue)(m, 0); 1685 } 1686 1687 /* 1688 * This is called to generate routing socket messages indicating 1689 * IEEE80211 wireless events. 1690 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1691 */ 1692 void 1693 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1694 size_t data_len) 1695 { 1696 struct mbuf *m; 1697 struct rt_addrinfo info; 1698 1699 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1700 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1701 return; 1702 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1703 if (m == NULL) 1704 return; 1705 /* 1706 * Append the ieee80211 data. Try to stick it in the 1707 * mbuf containing the ifannounce msg; otherwise allocate 1708 * a new mbuf and append. 1709 * 1710 * NB: we assume m is a single mbuf. 1711 */ 1712 if (data_len > M_TRAILINGSPACE(m)) { 1713 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1714 if (n == NULL) { 1715 m_freem(m); 1716 return; 1717 } 1718 (void)memcpy(mtod(n, void *), data, data_len); 1719 n->m_len = data_len; 1720 m->m_next = n; 1721 } else if (data_len > 0) { 1722 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1723 m->m_len += data_len; 1724 } 1725 if (m->m_flags & M_PKTHDR) 1726 m->m_pkthdr.len += data_len; 1727 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1728 COMPATNAME(route_enqueue)(m, 0); 1729 } 1730 1731 #ifndef COMPAT_RTSOCK 1732 /* 1733 * Send a routing message as mimicing that a cloned route is added. 1734 */ 1735 void 1736 rt_clonedmsg(const struct sockaddr *dst, const struct ifnet *ifp, 1737 const struct rtentry *rt) 1738 { 1739 struct rt_addrinfo info; 1740 /* Mimic flags exactly */ 1741 #define RTF_LLINFO 0x400 1742 #define RTF_CLONED 0x2000 1743 int flags = RTF_UP | RTF_HOST | RTF_DONE | RTF_LLINFO | RTF_CLONED; 1744 union { 1745 struct sockaddr sa; 1746 struct sockaddr_storage ss; 1747 struct sockaddr_dl sdl; 1748 } u; 1749 uint8_t namelen = strlen(ifp->if_xname); 1750 uint8_t addrlen = ifp->if_addrlen; 1751 1752 if (rt == NULL) 1753 return; /* XXX */ 1754 1755 memset(&info, 0, sizeof(info)); 1756 info.rti_info[RTAX_DST] = dst; 1757 sockaddr_dl_init(&u.sdl, sizeof(u.ss), ifp->if_index, ifp->if_type, 1758 NULL, namelen, NULL, addrlen); 1759 info.rti_info[RTAX_GATEWAY] = &u.sa; 1760 1761 rt_missmsg(RTM_ADD, &info, flags, 0); 1762 #undef RTF_LLINFO 1763 #undef RTF_CLONED 1764 } 1765 #endif /* COMPAT_RTSOCK */ 1766 1767 /* 1768 * This is used in dumping the kernel table via sysctl(). 1769 */ 1770 static int 1771 sysctl_dumpentry(struct rtentry *rt, void *v) 1772 { 1773 struct rt_walkarg *w = v; 1774 int error = 0, size; 1775 struct rt_addrinfo info; 1776 1777 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1778 return 0; 1779 memset(&info, 0, sizeof(info)); 1780 info.rti_info[RTAX_DST] = rt_getkey(rt); 1781 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1782 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1783 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1784 if (rt->rt_ifp) { 1785 const struct ifaddr *rtifa; 1786 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1787 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1788 * then rt_get_ifa() != NULL. So this ought to still be safe. 1789 * --dyoung 1790 */ 1791 rtifa = rt_get_ifa(rt); 1792 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1793 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1794 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1795 } 1796 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1797 return error; 1798 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1799 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1800 1801 rtm->rtm_flags = rt->rt_flags; 1802 rtm->rtm_use = rt->rt_use; 1803 rtm_setmetrics(rt, rtm); 1804 KASSERT(rt->rt_ifp != NULL); 1805 rtm->rtm_index = rt->rt_ifp->if_index; 1806 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1807 rtm->rtm_addrs = info.rti_addrs; 1808 if ((error = copyout(rtm, w->w_where, size)) != 0) 1809 w->w_where = NULL; 1810 else 1811 w->w_where = (char *)w->w_where + size; 1812 } 1813 return error; 1814 } 1815 1816 static int 1817 sysctl_iflist_if(struct ifnet *ifp, struct rt_walkarg *w, 1818 struct rt_addrinfo *info, size_t len) 1819 { 1820 struct if_xmsghdr *ifm; 1821 int error; 1822 1823 ifm = (struct if_xmsghdr *)w->w_tmem; 1824 ifm->ifm_index = ifp->if_index; 1825 ifm->ifm_flags = ifp->if_flags; 1826 ifm->ifm_data = ifp->if_data; 1827 ifm->ifm_addrs = info->rti_addrs; 1828 if ((error = copyout(ifm, w->w_where, len)) == 0) 1829 w->w_where = (char *)w->w_where + len; 1830 return error; 1831 } 1832 1833 static int 1834 sysctl_iflist_addr(struct rt_walkarg *w, struct ifaddr *ifa, 1835 struct rt_addrinfo *info) 1836 { 1837 int len, error; 1838 1839 if ((error = rt_msg2(RTM_XNEWADDR, info, 0, w, &len))) 1840 return error; 1841 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1842 struct ifa_xmsghdr *ifam; 1843 1844 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1845 ifam->ifam_index = ifa->ifa_ifp->if_index; 1846 ifam->ifam_flags = ifa->ifa_flags; 1847 ifam->ifam_metric = ifa->ifa_metric; 1848 ifam->ifam_addrs = info->rti_addrs; 1849 #ifndef COMPAT_RTSOCK 1850 ifam->ifam_pid = 0; 1851 ifam->ifam_addrflags = if_addrflags(ifa); 1852 #endif 1853 if ((error = copyout(w->w_tmem, w->w_where, len)) == 0) 1854 w->w_where = (char *)w->w_where + len; 1855 } 1856 return error; 1857 } 1858 1859 static int 1860 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1861 { 1862 struct ifnet *ifp; 1863 struct ifaddr *ifa; 1864 struct rt_addrinfo info; 1865 int cmd, len, error = 0; 1866 int (*iflist_if)(struct ifnet *, struct rt_walkarg *, 1867 struct rt_addrinfo *, size_t); 1868 int (*iflist_addr)(struct rt_walkarg *, struct ifaddr *, 1869 struct rt_addrinfo *); 1870 int s; 1871 struct psref psref; 1872 int bound; 1873 1874 switch (type) { 1875 case NET_RT_IFLIST: 1876 cmd = RTM_IFINFO; 1877 iflist_if = sysctl_iflist_if; 1878 iflist_addr = sysctl_iflist_addr; 1879 break; 1880 #ifdef COMPAT_14 1881 case NET_RT_OOOIFLIST: 1882 cmd = RTM_OOIFINFO; 1883 iflist_if = compat_14_iflist; 1884 iflist_addr = compat_70_iflist_addr; 1885 break; 1886 #endif 1887 #ifdef COMPAT_50 1888 case NET_RT_OOIFLIST: 1889 cmd = RTM_OIFINFO; 1890 iflist_if = compat_50_iflist; 1891 iflist_addr = compat_70_iflist_addr; 1892 break; 1893 #endif 1894 #ifdef COMPAT_70 1895 case NET_RT_OIFLIST: 1896 cmd = RTM_IFINFO; 1897 iflist_if = sysctl_iflist_if; 1898 iflist_addr = compat_70_iflist_addr; 1899 break; 1900 #endif 1901 default: 1902 #ifdef RTSOCK_DEBUG 1903 printf("%s: unsupported IFLIST type %d\n", __func__, type); 1904 #endif 1905 return EINVAL; 1906 } 1907 1908 memset(&info, 0, sizeof(info)); 1909 1910 bound = curlwp_bind(); 1911 s = pserialize_read_enter(); 1912 IFNET_READER_FOREACH(ifp) { 1913 int _s; 1914 if (w->w_arg && w->w_arg != ifp->if_index) 1915 continue; 1916 if (IFADDR_READER_EMPTY(ifp)) 1917 continue; 1918 1919 if_acquire(ifp, &psref); 1920 pserialize_read_exit(s); 1921 1922 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1923 if ((error = rt_msg2(cmd, &info, NULL, w, &len)) != 0) 1924 goto release_exit; 1925 info.rti_info[RTAX_IFP] = NULL; 1926 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1927 if ((error = iflist_if(ifp, w, &info, len)) != 0) 1928 goto release_exit; 1929 } 1930 _s = pserialize_read_enter(); 1931 IFADDR_READER_FOREACH(ifa, ifp) { 1932 struct psref _psref; 1933 if (af && af != ifa->ifa_addr->sa_family) 1934 continue; 1935 ifa_acquire(ifa, &_psref); 1936 pserialize_read_exit(_s); 1937 1938 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1939 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1940 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1941 error = iflist_addr(w, ifa, &info); 1942 1943 _s = pserialize_read_enter(); 1944 ifa_release(ifa, &_psref); 1945 if (error != 0) { 1946 pserialize_read_exit(_s); 1947 goto release_exit; 1948 } 1949 } 1950 pserialize_read_exit(_s); 1951 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1952 info.rti_info[RTAX_BRD] = NULL; 1953 1954 s = pserialize_read_enter(); 1955 if_release(ifp, &psref); 1956 } 1957 pserialize_read_exit(s); 1958 curlwp_bindx(bound); 1959 1960 return 0; 1961 1962 release_exit: 1963 if_release(ifp, &psref); 1964 curlwp_bindx(bound); 1965 return error; 1966 } 1967 1968 static int 1969 sysctl_rtable(SYSCTLFN_ARGS) 1970 { 1971 void *where = oldp; 1972 size_t *given = oldlenp; 1973 int i, s, error = EINVAL; 1974 u_char af; 1975 struct rt_walkarg w; 1976 1977 if (namelen == 1 && name[0] == CTL_QUERY) 1978 return sysctl_query(SYSCTLFN_CALL(rnode)); 1979 1980 if (newp) 1981 return EPERM; 1982 if (namelen != 3) 1983 return EINVAL; 1984 af = name[0]; 1985 w.w_tmemneeded = 0; 1986 w.w_tmemsize = 0; 1987 w.w_tmem = NULL; 1988 again: 1989 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1990 if (w.w_tmemneeded) { 1991 w.w_tmem = kmem_alloc(w.w_tmemneeded, KM_SLEEP); 1992 w.w_tmemsize = w.w_tmemneeded; 1993 w.w_tmemneeded = 0; 1994 } 1995 w.w_op = name[1]; 1996 w.w_arg = name[2]; 1997 w.w_given = *given; 1998 w.w_needed = 0 - w.w_given; 1999 w.w_where = where; 2000 2001 s = splsoftnet(); 2002 switch (w.w_op) { 2003 2004 case NET_RT_DUMP: 2005 case NET_RT_FLAGS: 2006 #if defined(INET) || defined(INET6) 2007 /* 2008 * take care of llinfo entries, the caller must 2009 * specify an AF 2010 */ 2011 if (w.w_op == NET_RT_FLAGS && 2012 (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { 2013 if (af != 0) 2014 error = lltable_sysctl_dump(af, &w); 2015 else 2016 error = EINVAL; 2017 break; 2018 } 2019 #endif 2020 2021 for (i = 1; i <= AF_MAX; i++) { 2022 if (af == 0 || af == i) { 2023 error = rt_walktree(i, sysctl_dumpentry, &w); 2024 if (error != 0) 2025 break; 2026 #if defined(INET) || defined(INET6) 2027 /* 2028 * Return ARP/NDP entries too for 2029 * backward compatibility. 2030 */ 2031 error = lltable_sysctl_dump(i, &w); 2032 if (error != 0) 2033 break; 2034 #endif 2035 } 2036 } 2037 break; 2038 2039 #ifdef COMPAT_14 2040 case NET_RT_OOOIFLIST: 2041 error = sysctl_iflist(af, &w, w.w_op); 2042 break; 2043 #endif 2044 #ifdef COMPAT_50 2045 case NET_RT_OOIFLIST: 2046 error = sysctl_iflist(af, &w, w.w_op); 2047 break; 2048 #endif 2049 #ifdef COMPAT_70 2050 case NET_RT_OIFLIST: 2051 error = sysctl_iflist(af, &w, w.w_op); 2052 break; 2053 #endif 2054 case NET_RT_IFLIST: 2055 error = sysctl_iflist(af, &w, w.w_op); 2056 break; 2057 } 2058 splx(s); 2059 2060 /* check to see if we couldn't allocate memory with NOWAIT */ 2061 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 2062 goto again; 2063 2064 if (w.w_tmem) 2065 kmem_free(w.w_tmem, w.w_tmemsize); 2066 w.w_needed += w.w_given; 2067 if (where) { 2068 *given = (char *)w.w_where - (char *)where; 2069 if (*given < w.w_needed) 2070 return ENOMEM; 2071 } else { 2072 *given = (11 * w.w_needed) / 10; 2073 } 2074 return error; 2075 } 2076 2077 /* 2078 * Routing message software interrupt routine 2079 */ 2080 static void 2081 COMPATNAME(route_intr)(void *cookie) 2082 { 2083 struct sockproto proto = { .sp_family = PF_XROUTE, }; 2084 struct route_info * const ri = &COMPATNAME(route_info); 2085 struct mbuf *m; 2086 2087 SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE(); 2088 for (;;) { 2089 IFQ_LOCK(&ri->ri_intrq); 2090 IF_DEQUEUE(&ri->ri_intrq, m); 2091 IFQ_UNLOCK(&ri->ri_intrq); 2092 if (m == NULL) 2093 break; 2094 proto.sp_protocol = M_GETCTX(m, uintptr_t); 2095 #ifdef NET_MPSAFE 2096 mutex_enter(rt_so_mtx); 2097 #endif 2098 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst, &rt_rawcb); 2099 #ifdef NET_MPSAFE 2100 mutex_exit(rt_so_mtx); 2101 #endif 2102 } 2103 SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); 2104 } 2105 2106 /* 2107 * Enqueue a message to the software interrupt routine. 2108 */ 2109 void 2110 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 2111 { 2112 struct route_info * const ri = &COMPATNAME(route_info); 2113 int wasempty; 2114 2115 IFQ_LOCK(&ri->ri_intrq); 2116 if (IF_QFULL(&ri->ri_intrq)) { 2117 IF_DROP(&ri->ri_intrq); 2118 IFQ_UNLOCK(&ri->ri_intrq); 2119 m_freem(m); 2120 } else { 2121 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 2122 M_SETCTX(m, (uintptr_t)family); 2123 IF_ENQUEUE(&ri->ri_intrq, m); 2124 IFQ_UNLOCK(&ri->ri_intrq); 2125 if (wasempty) { 2126 kpreempt_disable(); 2127 softint_schedule(ri->ri_sih); 2128 kpreempt_enable(); 2129 } 2130 } 2131 } 2132 2133 static void 2134 COMPATNAME(route_init)(void) 2135 { 2136 struct route_info * const ri = &COMPATNAME(route_info); 2137 2138 #ifndef COMPAT_RTSOCK 2139 rt_init(); 2140 #endif 2141 #ifdef NET_MPSAFE 2142 rt_so_mtx = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE); 2143 2144 cv_init(&rt_update_cv, "rtsock_cv"); 2145 #endif 2146 2147 sysctl_net_route_setup(NULL); 2148 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 2149 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 2150 COMPATNAME(route_intr), NULL); 2151 IFQ_LOCK_INIT(&ri->ri_intrq); 2152 } 2153 2154 /* 2155 * Definitions of protocols supported in the ROUTE domain. 2156 */ 2157 #ifndef COMPAT_RTSOCK 2158 PR_WRAP_USRREQS(route); 2159 #else 2160 PR_WRAP_USRREQS(compat_50_route); 2161 #endif 2162 2163 static const struct pr_usrreqs route_usrreqs = { 2164 .pr_attach = COMPATNAME(route_attach_wrapper), 2165 .pr_detach = COMPATNAME(route_detach_wrapper), 2166 .pr_accept = COMPATNAME(route_accept_wrapper), 2167 .pr_bind = COMPATNAME(route_bind_wrapper), 2168 .pr_listen = COMPATNAME(route_listen_wrapper), 2169 .pr_connect = COMPATNAME(route_connect_wrapper), 2170 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 2171 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 2172 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 2173 .pr_abort = COMPATNAME(route_abort_wrapper), 2174 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 2175 .pr_stat = COMPATNAME(route_stat_wrapper), 2176 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 2177 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 2178 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 2179 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 2180 .pr_send = COMPATNAME(route_send_wrapper), 2181 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 2182 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 2183 }; 2184 2185 static const struct protosw COMPATNAME(route_protosw)[] = { 2186 { 2187 .pr_type = SOCK_RAW, 2188 .pr_domain = &COMPATNAME(routedomain), 2189 .pr_flags = PR_ATOMIC|PR_ADDR, 2190 .pr_input = raw_input, 2191 .pr_ctlinput = raw_ctlinput, 2192 .pr_ctloutput = route_ctloutput, 2193 .pr_usrreqs = &route_usrreqs, 2194 .pr_init = rt_pr_init, 2195 }, 2196 }; 2197 2198 struct domain COMPATNAME(routedomain) = { 2199 .dom_family = PF_XROUTE, 2200 .dom_name = DOMAINNAME, 2201 .dom_init = COMPATNAME(route_init), 2202 .dom_protosw = COMPATNAME(route_protosw), 2203 .dom_protoswNPROTOSW = 2204 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 2205 }; 2206 2207 static void 2208 sysctl_net_route_setup(struct sysctllog **clog) 2209 { 2210 const struct sysctlnode *rnode = NULL; 2211 2212 sysctl_createv(clog, 0, NULL, &rnode, 2213 CTLFLAG_PERMANENT, 2214 CTLTYPE_NODE, DOMAINNAME, 2215 SYSCTL_DESCR("PF_ROUTE information"), 2216 NULL, 0, NULL, 0, 2217 CTL_NET, PF_XROUTE, CTL_EOL); 2218 2219 sysctl_createv(clog, 0, NULL, NULL, 2220 CTLFLAG_PERMANENT, 2221 CTLTYPE_NODE, "rtable", 2222 SYSCTL_DESCR("Routing table information"), 2223 sysctl_rtable, 0, NULL, 0, 2224 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 2225 2226 sysctl_createv(clog, 0, &rnode, NULL, 2227 CTLFLAG_PERMANENT, 2228 CTLTYPE_STRUCT, "stats", 2229 SYSCTL_DESCR("Routing statistics"), 2230 NULL, 0, &rtstat, sizeof(rtstat), 2231 CTL_CREATE, CTL_EOL); 2232 } 2233
Indexes created Wed Sep 24 05:09:52 GMT 2025