rtsock.c revision 1.234
1 /* $NetBSD: rtsock.c,v 1.234 2017/12/14 05:48:59 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 1.234 2017/12/14 05:48:59 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 86 #include <net/if.h> 87 #include <net/if_llatbl.h> 88 #include <net/if_types.h> 89 #include <net/route.h> 90 #include <net/raw_cb.h> 91 92 #include <netinet/in_var.h> 93 #include <netinet/if_inarp.h> 94 95 #include <netmpls/mpls.h> 96 97 #ifdef SCTP 98 extern void sctp_add_ip_address(struct ifaddr *); 99 extern void sctp_delete_ip_address(struct ifaddr *); 100 #endif 101 102 #if defined(COMPAT_14) || defined(COMPAT_50) || defined(COMPAT_70) 103 #include <compat/net/if.h> 104 #include <compat/net/route.h> 105 #endif 106 #ifdef COMPAT_RTSOCK 107 #define RTM_XVERSION RTM_OVERSION 108 #define RTM_XNEWADDR RTM_ONEWADDR 109 #define RTM_XDELADDR RTM_ODELADDR 110 #define RTM_XCHGADDR RTM_OCHGADDR 111 #define RT_XADVANCE(a,b) RT_OADVANCE(a,b) 112 #define RT_XROUNDUP(n) RT_OROUNDUP(n) 113 #define PF_XROUTE PF_OROUTE 114 #define rt_xmsghdr rt_msghdr50 115 #define if_xmsghdr if_msghdr /* if_msghdr50 is for RTM_OIFINFO */ 116 #define ifa_xmsghdr ifa_msghdr50 117 #define if_xannouncemsghdr if_announcemsghdr50 118 #define COMPATNAME(x) compat_50_ ## x 119 #define DOMAINNAME "oroute" 120 CTASSERT(sizeof(struct ifa_xmsghdr) == 20); 121 DOMAIN_DEFINE(compat_50_routedomain); /* forward declare and add to link set */ 122 #undef COMPAT_70 123 #else /* COMPAT_RTSOCK */ 124 #define RTM_XVERSION RTM_VERSION 125 #define RTM_XNEWADDR RTM_NEWADDR 126 #define RTM_XDELADDR RTM_DELADDR 127 #define RTM_XCHGADDR RTM_CHGADDR 128 #define RT_XADVANCE(a,b) RT_ADVANCE(a,b) 129 #define RT_XROUNDUP(n) RT_ROUNDUP(n) 130 #define PF_XROUTE PF_ROUTE 131 #define rt_xmsghdr rt_msghdr 132 #define if_xmsghdr if_msghdr 133 #define ifa_xmsghdr ifa_msghdr 134 #define if_xannouncemsghdr if_announcemsghdr 135 #define COMPATNAME(x) x 136 #define DOMAINNAME "route" 137 CTASSERT(sizeof(struct ifa_xmsghdr) == 32); 138 #ifdef COMPAT_50 139 #define COMPATCALL(name, args) compat_50_ ## name args 140 #endif 141 DOMAIN_DEFINE(routedomain); /* forward declare and add to link set */ 142 #undef COMPAT_50 143 #undef COMPAT_14 144 #endif /* COMPAT_RTSOCK */ 145 146 #ifndef COMPATCALL 147 #define COMPATCALL(name, args) do { } while (/*CONSTCOND*/ 0) 148 #endif 149 150 #ifdef RTSOCK_DEBUG 151 #define RT_IN_PRINT(info, b, a) (in_print((b), sizeof(b), \ 152 &((const struct sockaddr_in *)(info)->rti_info[(a)])->sin_addr), (b)) 153 #endif /* RTSOCK_DEBUG */ 154 155 struct route_info COMPATNAME(route_info) = { 156 .ri_dst = { .sa_len = 2, .sa_family = PF_XROUTE, }, 157 .ri_src = { .sa_len = 2, .sa_family = PF_XROUTE, }, 158 .ri_maxqlen = IFQ_MAXLEN, 159 }; 160 161 #define PRESERVED_RTF (RTF_UP | RTF_GATEWAY | RTF_HOST | RTF_DONE | RTF_MASK) 162 163 static void COMPATNAME(route_init)(void); 164 static int COMPATNAME(route_output)(struct mbuf *, struct socket *); 165 166 static int rt_xaddrs(u_char, const char *, const char *, struct rt_addrinfo *); 167 static struct mbuf *rt_makeifannouncemsg(struct ifnet *, int, int, 168 struct rt_addrinfo *); 169 static int rt_msg2(int, struct rt_addrinfo *, void *, struct rt_walkarg *, int *); 170 static void rt_setmetrics(int, const struct rt_xmsghdr *, struct rtentry *); 171 static void rtm_setmetrics(const struct rtentry *, struct rt_xmsghdr *); 172 static void sysctl_net_route_setup(struct sysctllog **); 173 static int sysctl_dumpentry(struct rtentry *, void *); 174 static int sysctl_iflist(int, struct rt_walkarg *, int); 175 static int sysctl_rtable(SYSCTLFN_PROTO); 176 static void rt_adjustcount(int, int); 177 178 static const struct protosw COMPATNAME(route_protosw)[]; 179 180 struct routecb { 181 struct rawcb rocb_rcb; 182 unsigned int rocb_msgfilter; 183 #define RTMSGFILTER(m) (1U << (m)) 184 }; 185 #define sotoroutecb(so) ((struct routecb *)(so)->so_pcb) 186 187 static struct rawcbhead rt_rawcb; 188 #ifdef NET_MPSAFE 189 static kmutex_t *rt_so_mtx; 190 #endif 191 192 static void 193 rt_adjustcount(int af, int cnt) 194 { 195 struct route_cb * const cb = &COMPATNAME(route_info).ri_cb; 196 197 cb->any_count += cnt; 198 199 switch (af) { 200 case AF_INET: 201 cb->ip_count += cnt; 202 return; 203 #ifdef INET6 204 case AF_INET6: 205 cb->ip6_count += cnt; 206 return; 207 #endif 208 case AF_MPLS: 209 cb->mpls_count += cnt; 210 return; 211 } 212 } 213 214 static int 215 COMPATNAME(route_filter)(struct mbuf *m, struct sockproto *proto, 216 struct rawcb *rp) 217 { 218 struct routecb *rop = (struct routecb *)rp; 219 struct rt_xmsghdr *rtm; 220 221 KASSERT(m != NULL); 222 KASSERT(proto != NULL); 223 KASSERT(rp != NULL); 224 225 /* Wrong family for this socket. */ 226 if (proto->sp_family != PF_ROUTE) 227 return ENOPROTOOPT; 228 229 /* If no filter set, just return. */ 230 if (rop->rocb_msgfilter == 0) 231 return 0; 232 233 /* Ensure we can access rtm_type */ 234 if (m->m_len < 235 offsetof(struct rt_xmsghdr, rtm_type) + sizeof(rtm->rtm_type)) 236 return EINVAL; 237 238 rtm = mtod(m, struct rt_xmsghdr *); 239 /* If the rtm type is filtered out, return a positive. */ 240 if (!(rop->rocb_msgfilter & RTMSGFILTER(rtm->rtm_type))) 241 return EEXIST; 242 243 /* Passed the filter. */ 244 return 0; 245 } 246 247 static void 248 rt_pr_init(void) 249 { 250 251 LIST_INIT(&rt_rawcb); 252 } 253 254 static int 255 COMPATNAME(route_attach)(struct socket *so, int proto) 256 { 257 struct rawcb *rp; 258 struct routecb *rop; 259 int s, error; 260 261 KASSERT(sotorawcb(so) == NULL); 262 rop = kmem_zalloc(sizeof(*rop), KM_SLEEP); 263 rp = &rop->rocb_rcb; 264 rp->rcb_len = sizeof(*rop); 265 so->so_pcb = rp; 266 267 s = splsoftnet(); 268 269 #ifdef NET_MPSAFE 270 KASSERT(so->so_lock == NULL); 271 mutex_obj_hold(rt_so_mtx); 272 so->so_lock = rt_so_mtx; 273 solock(so); 274 #endif 275 276 if ((error = raw_attach(so, proto, &rt_rawcb)) == 0) { 277 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 278 rp->rcb_laddr = &COMPATNAME(route_info).ri_src; 279 rp->rcb_faddr = &COMPATNAME(route_info).ri_dst; 280 rp->rcb_filter = COMPATNAME(route_filter); 281 } 282 splx(s); 283 284 if (error) { 285 kmem_free(rop, sizeof(*rop)); 286 so->so_pcb = NULL; 287 return error; 288 } 289 290 soisconnected(so); 291 so->so_options |= SO_USELOOPBACK; 292 KASSERT(solocked(so)); 293 294 return error; 295 } 296 297 static void 298 COMPATNAME(route_detach)(struct socket *so) 299 { 300 struct rawcb *rp = sotorawcb(so); 301 int s; 302 303 KASSERT(rp != NULL); 304 KASSERT(solocked(so)); 305 306 s = splsoftnet(); 307 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 308 raw_detach(so); 309 splx(s); 310 } 311 312 static int 313 COMPATNAME(route_accept)(struct socket *so, struct sockaddr *nam) 314 { 315 KASSERT(solocked(so)); 316 317 panic("route_accept"); 318 319 return EOPNOTSUPP; 320 } 321 322 static int 323 COMPATNAME(route_bind)(struct socket *so, struct sockaddr *nam, struct lwp *l) 324 { 325 KASSERT(solocked(so)); 326 327 return EOPNOTSUPP; 328 } 329 330 static int 331 COMPATNAME(route_listen)(struct socket *so, struct lwp *l) 332 { 333 KASSERT(solocked(so)); 334 335 return EOPNOTSUPP; 336 } 337 338 static int 339 COMPATNAME(route_connect)(struct socket *so, struct sockaddr *nam, struct lwp *l) 340 { 341 KASSERT(solocked(so)); 342 343 return EOPNOTSUPP; 344 } 345 346 static int 347 COMPATNAME(route_connect2)(struct socket *so, struct socket *so2) 348 { 349 KASSERT(solocked(so)); 350 351 return EOPNOTSUPP; 352 } 353 354 static int 355 COMPATNAME(route_disconnect)(struct socket *so) 356 { 357 struct rawcb *rp = sotorawcb(so); 358 int s; 359 360 KASSERT(solocked(so)); 361 KASSERT(rp != NULL); 362 363 s = splsoftnet(); 364 soisdisconnected(so); 365 raw_disconnect(rp); 366 splx(s); 367 368 return 0; 369 } 370 371 static int 372 COMPATNAME(route_shutdown)(struct socket *so) 373 { 374 int s; 375 376 KASSERT(solocked(so)); 377 378 /* 379 * Mark the connection as being incapable of further input. 380 */ 381 s = splsoftnet(); 382 socantsendmore(so); 383 splx(s); 384 return 0; 385 } 386 387 static int 388 COMPATNAME(route_abort)(struct socket *so) 389 { 390 KASSERT(solocked(so)); 391 392 panic("route_abort"); 393 394 return EOPNOTSUPP; 395 } 396 397 static int 398 COMPATNAME(route_ioctl)(struct socket *so, u_long cmd, void *nam, 399 struct ifnet * ifp) 400 { 401 return EOPNOTSUPP; 402 } 403 404 static int 405 COMPATNAME(route_stat)(struct socket *so, struct stat *ub) 406 { 407 KASSERT(solocked(so)); 408 409 return 0; 410 } 411 412 static int 413 COMPATNAME(route_peeraddr)(struct socket *so, struct sockaddr *nam) 414 { 415 struct rawcb *rp = sotorawcb(so); 416 417 KASSERT(solocked(so)); 418 KASSERT(rp != NULL); 419 KASSERT(nam != NULL); 420 421 if (rp->rcb_faddr == NULL) 422 return ENOTCONN; 423 424 raw_setpeeraddr(rp, nam); 425 return 0; 426 } 427 428 static int 429 COMPATNAME(route_sockaddr)(struct socket *so, struct sockaddr *nam) 430 { 431 struct rawcb *rp = sotorawcb(so); 432 433 KASSERT(solocked(so)); 434 KASSERT(rp != NULL); 435 KASSERT(nam != NULL); 436 437 if (rp->rcb_faddr == NULL) 438 return ENOTCONN; 439 440 raw_setsockaddr(rp, nam); 441 return 0; 442 } 443 444 static int 445 COMPATNAME(route_rcvd)(struct socket *so, int flags, struct lwp *l) 446 { 447 KASSERT(solocked(so)); 448 449 return EOPNOTSUPP; 450 } 451 452 static int 453 COMPATNAME(route_recvoob)(struct socket *so, struct mbuf *m, int flags) 454 { 455 KASSERT(solocked(so)); 456 457 return EOPNOTSUPP; 458 } 459 460 static int 461 COMPATNAME(route_send)(struct socket *so, struct mbuf *m, 462 struct sockaddr *nam, struct mbuf *control, struct lwp *l) 463 { 464 int error = 0; 465 int s; 466 467 KASSERT(solocked(so)); 468 KASSERT(so->so_proto == &COMPATNAME(route_protosw)[0]); 469 470 s = splsoftnet(); 471 error = raw_send(so, m, nam, control, l, &COMPATNAME(route_output)); 472 splx(s); 473 474 return error; 475 } 476 477 static int 478 COMPATNAME(route_sendoob)(struct socket *so, struct mbuf *m, 479 struct mbuf *control) 480 { 481 KASSERT(solocked(so)); 482 483 m_freem(m); 484 m_freem(control); 485 486 return EOPNOTSUPP; 487 } 488 static int 489 COMPATNAME(route_purgeif)(struct socket *so, struct ifnet *ifp) 490 { 491 492 panic("route_purgeif"); 493 494 return EOPNOTSUPP; 495 } 496 497 #if defined(INET) || defined(INET6) 498 static int __noinline 499 route_get_sdl_index(struct rt_addrinfo *info, int *sdl_index) 500 { 501 struct rtentry *nrt; 502 int error; 503 504 error = rtrequest1(RTM_GET, info, &nrt); 505 if (error != 0) 506 return error; 507 /* 508 * nrt->rt_ifp->if_index may not be correct 509 * due to changing to ifplo0. 510 */ 511 *sdl_index = satosdl(nrt->rt_gateway)->sdl_index; 512 rt_unref(nrt); 513 514 return 0; 515 } 516 #endif 517 518 static void __noinline 519 route_get_sdl(const struct ifnet *ifp, const struct sockaddr *dst, 520 struct sockaddr_dl *sdl, int *flags) 521 { 522 struct llentry *la; 523 524 KASSERT(ifp != NULL); 525 526 IF_AFDATA_RLOCK(ifp); 527 switch (dst->sa_family) { 528 case AF_INET: 529 la = lla_lookup(LLTABLE(ifp), 0, dst); 530 break; 531 case AF_INET6: 532 la = lla_lookup(LLTABLE6(ifp), 0, dst); 533 break; 534 default: 535 la = NULL; 536 KASSERTMSG(0, "Invalid AF=%d\n", dst->sa_family); 537 break; 538 } 539 IF_AFDATA_RUNLOCK(ifp); 540 541 void *a = (LLE_IS_VALID(la) && (la->la_flags & LLE_VALID) == LLE_VALID) 542 ? &la->ll_addr : NULL; 543 544 a = sockaddr_dl_init(sdl, sizeof(*sdl), ifp->if_index, ifp->if_type, 545 NULL, 0, a, ifp->if_addrlen); 546 KASSERT(a != NULL); 547 548 if (la != NULL) { 549 *flags = la->la_flags; 550 LLE_RUNLOCK(la); 551 } 552 } 553 554 static int __noinline 555 route_output_report(struct rtentry *rt, struct rt_addrinfo *info, 556 struct rt_xmsghdr *rtm, struct rt_xmsghdr **new_rtm) 557 { 558 int len; 559 560 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 561 const struct ifaddr *rtifa; 562 const struct ifnet *ifp = rt->rt_ifp; 563 564 info->rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 565 /* rtifa used to be simply rt->rt_ifa. 566 * If rt->rt_ifa != NULL, then 567 * rt_get_ifa() != NULL. So this 568 * ought to still be safe. --dyoung 569 */ 570 rtifa = rt_get_ifa(rt); 571 info->rti_info[RTAX_IFA] = rtifa->ifa_addr; 572 #ifdef RTSOCK_DEBUG 573 if (info->rti_info[RTAX_IFA]->sa_family == AF_INET) { 574 char ibuf[INET_ADDRSTRLEN]; 575 char abuf[INET_ADDRSTRLEN]; 576 printf("%s: copying out RTAX_IFA %s " 577 "for info->rti_info[RTAX_DST] %s " 578 "ifa_getifa %p ifa_seqno %p\n", 579 __func__, 580 RT_IN_PRINT(info, ibuf, RTAX_IFA), 581 RT_IN_PRINT(info, abuf, RTAX_DST), 582 (void *)rtifa->ifa_getifa, 583 rtifa->ifa_seqno); 584 } 585 #endif /* RTSOCK_DEBUG */ 586 if (ifp->if_flags & IFF_POINTOPOINT) 587 info->rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 588 else 589 info->rti_info[RTAX_BRD] = NULL; 590 rtm->rtm_index = ifp->if_index; 591 } 592 (void)rt_msg2(rtm->rtm_type, info, NULL, NULL, &len); 593 if (len > rtm->rtm_msglen) { 594 struct rt_xmsghdr *old_rtm = rtm; 595 R_Malloc(*new_rtm, struct rt_xmsghdr *, len); 596 if (*new_rtm == NULL) 597 return ENOBUFS; 598 (void)memcpy(*new_rtm, old_rtm, old_rtm->rtm_msglen); 599 rtm = *new_rtm; 600 } 601 (void)rt_msg2(rtm->rtm_type, info, rtm, NULL, 0); 602 rtm->rtm_flags = rt->rt_flags; 603 rtm_setmetrics(rt, rtm); 604 rtm->rtm_addrs = info->rti_addrs; 605 606 return 0; 607 } 608 609 static struct ifaddr * __noinline 610 route_output_get_ifa(const struct rt_addrinfo info, const struct rtentry *rt, 611 struct ifnet **ifp, struct psref *psref_ifp, struct psref *psref) 612 { 613 struct ifaddr *ifa = NULL; 614 615 *ifp = NULL; 616 if (info.rti_info[RTAX_IFP] != NULL) { 617 ifa = ifa_ifwithnet_psref(info.rti_info[RTAX_IFP], psref); 618 if (ifa == NULL) 619 goto next; 620 *ifp = ifa->ifa_ifp; 621 if_acquire(*ifp, psref_ifp); 622 if (info.rti_info[RTAX_IFA] == NULL && 623 info.rti_info[RTAX_GATEWAY] == NULL) 624 goto next; 625 ifa_release(ifa, psref); 626 if (info.rti_info[RTAX_IFA] == NULL) { 627 /* route change <dst> <gw> -ifp <if> */ 628 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_GATEWAY], 629 *ifp, psref); 630 } else { 631 /* route change <dst> -ifp <if> -ifa <addr> */ 632 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 633 if (ifa != NULL) 634 goto out; 635 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_IFA], 636 *ifp, psref); 637 } 638 goto out; 639 } 640 next: 641 if (info.rti_info[RTAX_IFA] != NULL) { 642 /* route change <dst> <gw> -ifa <addr> */ 643 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 644 if (ifa != NULL) 645 goto out; 646 } 647 if (info.rti_info[RTAX_GATEWAY] != NULL) { 648 /* route change <dst> <gw> */ 649 ifa = ifa_ifwithroute_psref(rt->rt_flags, rt_getkey(rt), 650 info.rti_info[RTAX_GATEWAY], psref); 651 } 652 out: 653 if (ifa != NULL && *ifp == NULL) { 654 *ifp = ifa->ifa_ifp; 655 if_acquire(*ifp, psref_ifp); 656 } 657 if (ifa == NULL && *ifp != NULL) { 658 if_put(*ifp, psref_ifp); 659 *ifp = NULL; 660 } 661 return ifa; 662 } 663 664 static int __noinline 665 route_output_change(struct rtentry *rt, struct rt_addrinfo *info, 666 struct rt_xmsghdr *rtm) 667 { 668 int error = 0; 669 struct ifnet *ifp = NULL, *new_ifp; 670 struct ifaddr *ifa = NULL, *new_ifa; 671 struct psref psref_ifa, psref_new_ifa, psref_ifp, psref_new_ifp; 672 bool newgw, ifp_changed = false; 673 674 /* 675 * New gateway could require new ifaddr, ifp; 676 * flags may also be different; ifp may be specified 677 * by ll sockaddr when protocol address is ambiguous 678 */ 679 newgw = info->rti_info[RTAX_GATEWAY] != NULL && 680 sockaddr_cmp(info->rti_info[RTAX_GATEWAY], rt->rt_gateway) != 0; 681 682 if (newgw || info->rti_info[RTAX_IFP] != NULL || 683 info->rti_info[RTAX_IFA] != NULL) { 684 ifp = rt_getifp(info, &psref_ifp); 685 /* info refers ifp so we need to keep a reference */ 686 ifa = rt_getifa(info, &psref_ifa); 687 if (ifa == NULL) { 688 error = ENETUNREACH; 689 goto out; 690 } 691 } 692 if (newgw) { 693 error = rt_setgate(rt, info->rti_info[RTAX_GATEWAY]); 694 if (error != 0) 695 goto out; 696 } 697 if (info->rti_info[RTAX_TAG]) { 698 const struct sockaddr *tag; 699 tag = rt_settag(rt, info->rti_info[RTAX_TAG]); 700 if (tag == NULL) { 701 error = ENOBUFS; 702 goto out; 703 } 704 } 705 /* 706 * New gateway could require new ifaddr, ifp; 707 * flags may also be different; ifp may be specified 708 * by ll sockaddr when protocol address is ambiguous 709 */ 710 new_ifa = route_output_get_ifa(*info, rt, &new_ifp, &psref_new_ifp, 711 &psref_new_ifa); 712 if (new_ifa != NULL) { 713 ifa_release(ifa, &psref_ifa); 714 ifa = new_ifa; 715 } 716 if (ifa) { 717 struct ifaddr *oifa = rt->rt_ifa; 718 if (oifa != ifa && !ifa_is_destroying(ifa) && 719 new_ifp != NULL && !if_is_deactivated(new_ifp)) { 720 if (oifa && oifa->ifa_rtrequest) 721 oifa->ifa_rtrequest(RTM_DELETE, rt, info); 722 rt_replace_ifa(rt, ifa); 723 rt->rt_ifp = new_ifp; 724 ifp_changed = true; 725 } 726 if (new_ifa == NULL) 727 ifa_release(ifa, &psref_ifa); 728 } 729 ifa_release(new_ifa, &psref_new_ifa); 730 if (new_ifp && rt->rt_ifp != new_ifp && !if_is_deactivated(new_ifp)) { 731 rt->rt_ifp = new_ifp; 732 ifp_changed = true; 733 } 734 rt_setmetrics(rtm->rtm_inits, rtm, rt); 735 if (rt->rt_flags != info->rti_flags) { 736 rt->rt_flags = (info->rti_flags & ~PRESERVED_RTF) | 737 (rt->rt_flags & PRESERVED_RTF); 738 } 739 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 740 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info); 741 #if defined(INET) || defined(INET6) 742 if (ifp_changed && rt_mask(rt) != NULL) 743 lltable_prefix_free(rt_getkey(rt)->sa_family, rt_getkey(rt), 744 rt_mask(rt), 0); 745 #else 746 (void)ifp_changed; /* XXX gcc */ 747 #endif 748 out: 749 if_put(new_ifp, &psref_new_ifp); 750 if_put(ifp, &psref_ifp); 751 752 return error; 753 } 754 755 /*ARGSUSED*/ 756 int 757 COMPATNAME(route_output)(struct mbuf *m, struct socket *so) 758 { 759 struct sockproto proto = { .sp_family = PF_XROUTE, }; 760 struct rt_xmsghdr *rtm = NULL; 761 struct rt_xmsghdr *old_rtm = NULL, *new_rtm = NULL; 762 struct rtentry *rt = NULL; 763 struct rtentry *saved_nrt = NULL; 764 struct rt_addrinfo info; 765 int len, error = 0; 766 sa_family_t family; 767 struct sockaddr_dl sdl; 768 int bound = curlwp_bind(); 769 bool do_rt_free = false; 770 struct sockaddr_storage netmask; 771 772 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 773 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 774 (m = m_pullup(m, sizeof(int32_t))) == NULL)) { 775 error = ENOBUFS; 776 goto out; 777 } 778 if ((m->m_flags & M_PKTHDR) == 0) 779 panic("%s", __func__); 780 len = m->m_pkthdr.len; 781 if (len < sizeof(*rtm) || 782 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 783 info.rti_info[RTAX_DST] = NULL; 784 senderr(EINVAL); 785 } 786 R_Malloc(rtm, struct rt_xmsghdr *, len); 787 if (rtm == NULL) { 788 info.rti_info[RTAX_DST] = NULL; 789 senderr(ENOBUFS); 790 } 791 m_copydata(m, 0, len, rtm); 792 if (rtm->rtm_version != RTM_XVERSION) { 793 info.rti_info[RTAX_DST] = NULL; 794 senderr(EPROTONOSUPPORT); 795 } 796 rtm->rtm_pid = curproc->p_pid; 797 memset(&info, 0, sizeof(info)); 798 info.rti_addrs = rtm->rtm_addrs; 799 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 800 &info)) { 801 senderr(EINVAL); 802 } 803 info.rti_flags = rtm->rtm_flags; 804 #ifdef RTSOCK_DEBUG 805 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 806 char abuf[INET_ADDRSTRLEN]; 807 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 808 RT_IN_PRINT(&info, abuf, RTAX_DST)); 809 } 810 #endif /* RTSOCK_DEBUG */ 811 if (info.rti_info[RTAX_DST] == NULL || 812 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 813 senderr(EINVAL); 814 } 815 if (info.rti_info[RTAX_GATEWAY] != NULL && 816 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 817 senderr(EINVAL); 818 } 819 820 /* 821 * Verify that the caller has the appropriate privilege; RTM_GET 822 * is the only operation the non-superuser is allowed. 823 */ 824 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 825 0, rtm, NULL, NULL) != 0) 826 senderr(EACCES); 827 828 /* 829 * route(8) passes a sockaddr truncated with prefixlen. 830 * The kernel doesn't expect such sockaddr and need to 831 * use a buffer that is big enough for the sockaddr expected 832 * (padded with 0's). We keep the original length of the sockaddr. 833 */ 834 if (info.rti_info[RTAX_NETMASK]) { 835 /* 836 * Use the family of RTAX_DST, because RTAX_NETMASK 837 * can have a zero family if it comes from the radix 838 * tree via rt_mask(). 839 */ 840 socklen_t sa_len = sockaddr_getsize_by_family( 841 info.rti_info[RTAX_DST]->sa_family); 842 socklen_t masklen = sockaddr_getlen( 843 info.rti_info[RTAX_NETMASK]); 844 if (sa_len != 0 && sa_len > masklen) { 845 KASSERT(sa_len <= sizeof(netmask)); 846 memcpy(&netmask, info.rti_info[RTAX_NETMASK], masklen); 847 memset((char *)&netmask + masklen, 0, sa_len - masklen); 848 info.rti_info[RTAX_NETMASK] = sstocsa(&netmask); 849 } 850 } 851 852 switch (rtm->rtm_type) { 853 854 case RTM_ADD: 855 if (info.rti_info[RTAX_GATEWAY] == NULL) { 856 senderr(EINVAL); 857 } 858 #if defined(INET) || defined(INET6) 859 /* support for new ARP/NDP code with keeping backcompat */ 860 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { 861 const struct sockaddr_dl *sdlp = 862 satocsdl(info.rti_info[RTAX_GATEWAY]); 863 864 /* Allow routing requests by interface index */ 865 if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 866 && sdlp->sdl_slen == 0) 867 goto fallback; 868 /* 869 * Old arp binaries don't set the sdl_index 870 * so we have to complement it. 871 */ 872 int sdl_index = sdlp->sdl_index; 873 if (sdl_index == 0) { 874 error = route_get_sdl_index(&info, &sdl_index); 875 if (error != 0) 876 goto fallback; 877 } else if ( 878 info.rti_info[RTAX_DST]->sa_family == AF_INET) { 879 /* 880 * XXX workaround for SIN_PROXY case; proxy arp 881 * entry should be in an interface that has 882 * a network route including the destination, 883 * not a local (link) route that may not be a 884 * desired place, for example a tap. 885 */ 886 const struct sockaddr_inarp *sina = 887 (const struct sockaddr_inarp *) 888 info.rti_info[RTAX_DST]; 889 if (sina->sin_other & SIN_PROXY) { 890 error = route_get_sdl_index(&info, 891 &sdl_index); 892 if (error != 0) 893 goto fallback; 894 } 895 } 896 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 897 rtm->rtm_rmx.rmx_expire, &info, sdl_index); 898 break; 899 } 900 fallback: 901 #endif /* defined(INET) || defined(INET6) */ 902 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 903 if (error == 0) { 904 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 905 rt_unref(saved_nrt); 906 } 907 break; 908 909 case RTM_DELETE: 910 #if defined(INET) || defined(INET6) 911 /* support for new ARP/NDP code */ 912 if (info.rti_info[RTAX_GATEWAY] && 913 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 914 (rtm->rtm_flags & RTF_LLDATA) != 0) { 915 const struct sockaddr_dl *sdlp = 916 satocsdl(info.rti_info[RTAX_GATEWAY]); 917 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 918 rtm->rtm_rmx.rmx_expire, &info, sdlp->sdl_index); 919 rtm->rtm_flags &= ~RTF_UP; 920 break; 921 } 922 #endif 923 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 924 if (error != 0) 925 break; 926 927 rt = saved_nrt; 928 do_rt_free = true; 929 info.rti_info[RTAX_DST] = rt_getkey(rt); 930 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 931 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 932 info.rti_info[RTAX_TAG] = rt_gettag(rt); 933 error = route_output_report(rt, &info, rtm, &new_rtm); 934 if (error) 935 senderr(error); 936 if (new_rtm != NULL) { 937 old_rtm = rtm; 938 rtm = new_rtm; 939 } 940 break; 941 942 case RTM_GET: 943 case RTM_CHANGE: 944 case RTM_LOCK: 945 /* XXX This will mask info.rti_info[RTAX_DST] with 946 * info.rti_info[RTAX_NETMASK] before 947 * searching. It did not used to do that. --dyoung 948 */ 949 rt = NULL; 950 error = rtrequest1(RTM_GET, &info, &rt); 951 if (error != 0) 952 senderr(error); 953 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 954 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 955 info.rti_info[RTAX_DST]->sa_len) != 0) 956 senderr(ESRCH); 957 if (info.rti_info[RTAX_NETMASK] == NULL && 958 rt_mask(rt) != NULL) 959 senderr(ETOOMANYREFS); 960 } 961 962 /* 963 * XXX if arp/ndp requests an L2 entry, we have to obtain 964 * it from lltable while for the route command we have to 965 * return a route as it is. How to distinguish them? 966 * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp 967 * indicates an L2 entry is requested. For old arp/ndp 968 * binaries, we check RTF_UP flag is NOT set; it works 969 * by the fact that arp/ndp don't set it while the route 970 * command sets it. 971 */ 972 if (((rtm->rtm_flags & RTF_LLDATA) != 0 || 973 (rtm->rtm_flags & RTF_UP) == 0) && 974 rtm->rtm_type == RTM_GET && 975 sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { 976 int ll_flags = 0; 977 route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, 978 &ll_flags); 979 info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); 980 error = route_output_report(rt, &info, rtm, &new_rtm); 981 if (error) 982 senderr(error); 983 if (new_rtm != NULL) { 984 old_rtm = rtm; 985 rtm = new_rtm; 986 } 987 rtm->rtm_flags |= RTF_LLDATA; 988 rtm->rtm_flags &= ~RTF_CONNECTED; 989 rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; 990 break; 991 } 992 993 switch (rtm->rtm_type) { 994 case RTM_GET: 995 info.rti_info[RTAX_DST] = rt_getkey(rt); 996 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 997 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 998 info.rti_info[RTAX_TAG] = rt_gettag(rt); 999 error = route_output_report(rt, &info, rtm, &new_rtm); 1000 if (error) 1001 senderr(error); 1002 if (new_rtm != NULL) { 1003 old_rtm = rtm; 1004 rtm = new_rtm; 1005 } 1006 break; 1007 1008 case RTM_CHANGE: 1009 #ifdef NET_MPSAFE 1010 error = rt_update_prepare(rt); 1011 if (error == 0) { 1012 error = route_output_change(rt, &info, rtm); 1013 rt_update_finish(rt); 1014 } 1015 #else 1016 error = route_output_change(rt, &info, rtm); 1017 #endif 1018 if (error != 0) 1019 goto flush; 1020 /*FALLTHROUGH*/ 1021 case RTM_LOCK: 1022 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 1023 rt->rt_rmx.rmx_locks |= 1024 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 1025 break; 1026 } 1027 break; 1028 1029 default: 1030 senderr(EOPNOTSUPP); 1031 } 1032 1033 flush: 1034 if (rtm) { 1035 if (error) 1036 rtm->rtm_errno = error; 1037 else 1038 rtm->rtm_flags |= RTF_DONE; 1039 } 1040 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 1041 0; 1042 /* We cannot free old_rtm until we have stopped using the 1043 * pointers in info, some of which may point to sockaddrs 1044 * in old_rtm. 1045 */ 1046 if (old_rtm != NULL) 1047 Free(old_rtm); 1048 if (rt) { 1049 if (do_rt_free) 1050 rt_free(rt); 1051 else 1052 rt_unref(rt); 1053 } 1054 { 1055 struct rawcb *rp = NULL; 1056 /* 1057 * Check to see if we don't want our own messages. 1058 */ 1059 if ((so->so_options & SO_USELOOPBACK) == 0) { 1060 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 1061 if (rtm) 1062 Free(rtm); 1063 m_freem(m); 1064 goto out; 1065 } 1066 /* There is another listener, so construct message */ 1067 rp = sotorawcb(so); 1068 } 1069 if (rtm) { 1070 m_copyback(m, 0, rtm->rtm_msglen, rtm); 1071 if (m->m_pkthdr.len < rtm->rtm_msglen) { 1072 m_freem(m); 1073 m = NULL; 1074 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 1075 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 1076 Free(rtm); 1077 } 1078 if (rp) 1079 rp->rcb_proto.sp_family = 0; /* Avoid us */ 1080 if (family) 1081 proto.sp_protocol = family; 1082 if (m) 1083 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 1084 &COMPATNAME(route_info).ri_dst, &rt_rawcb); 1085 if (rp) 1086 rp->rcb_proto.sp_family = PF_XROUTE; 1087 } 1088 out: 1089 curlwp_bindx(bound); 1090 return error; 1091 } 1092 1093 static int 1094 route_ctloutput(int op, struct socket *so, struct sockopt *sopt) 1095 { 1096 struct routecb *rop = sotoroutecb(so); 1097 int error = 0; 1098 unsigned char *rtm_type; 1099 size_t len; 1100 unsigned int msgfilter; 1101 1102 KASSERT(solocked(so)); 1103 1104 if (sopt->sopt_level != AF_ROUTE) { 1105 error = ENOPROTOOPT; 1106 } else switch (op) { 1107 case PRCO_SETOPT: 1108 switch (sopt->sopt_name) { 1109 case RO_MSGFILTER: 1110 msgfilter = 0; 1111 for (rtm_type = sopt->sopt_data, len = sopt->sopt_size; 1112 len != 0; 1113 rtm_type++, len -= sizeof(*rtm_type)) 1114 { 1115 /* Guard against overflowing our storage. */ 1116 if (*rtm_type >= sizeof(msgfilter) * CHAR_BIT) { 1117 error = EOVERFLOW; 1118 break; 1119 } 1120 msgfilter |= RTMSGFILTER(*rtm_type); 1121 } 1122 if (error == 0) 1123 rop->rocb_msgfilter = msgfilter; 1124 break; 1125 default: 1126 error = ENOPROTOOPT; 1127 break; 1128 } 1129 break; 1130 case PRCO_GETOPT: 1131 switch (sopt->sopt_name) { 1132 case RO_MSGFILTER: 1133 error = ENOTSUP; 1134 break; 1135 default: 1136 error = ENOPROTOOPT; 1137 break; 1138 } 1139 } 1140 return error; 1141 } 1142 1143 static void 1144 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 1145 { 1146 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 1147 metric(RTV_RPIPE, rmx_recvpipe); 1148 metric(RTV_SPIPE, rmx_sendpipe); 1149 metric(RTV_SSTHRESH, rmx_ssthresh); 1150 metric(RTV_RTT, rmx_rtt); 1151 metric(RTV_RTTVAR, rmx_rttvar); 1152 metric(RTV_HOPCOUNT, rmx_hopcount); 1153 metric(RTV_MTU, rmx_mtu); 1154 #undef metric 1155 if (which & RTV_EXPIRE) { 1156 out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? 1157 time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; 1158 } 1159 } 1160 1161 static void 1162 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 1163 { 1164 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 1165 metric(rmx_recvpipe); 1166 metric(rmx_sendpipe); 1167 metric(rmx_ssthresh); 1168 metric(rmx_rtt); 1169 metric(rmx_rttvar); 1170 metric(rmx_hopcount); 1171 metric(rmx_mtu); 1172 metric(rmx_locks); 1173 #undef metric 1174 out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? 1175 time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; 1176 } 1177 1178 static int 1179 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 1180 struct rt_addrinfo *rtinfo) 1181 { 1182 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 1183 int i; 1184 1185 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 1186 if ((rtinfo->rti_addrs & (1 << i)) == 0) 1187 continue; 1188 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 1189 RT_XADVANCE(cp, sa); 1190 } 1191 1192 /* 1193 * Check for extra addresses specified, except RTM_GET asking 1194 * for interface info. 1195 */ 1196 if (rtmtype == RTM_GET) { 1197 if (((rtinfo->rti_addrs & 1198 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0U << i)) != 0) 1199 return 1; 1200 } else if ((rtinfo->rti_addrs & (~0U << i)) != 0) 1201 return 1; 1202 /* Check for bad data length. */ 1203 if (cp != cplim) { 1204 if (i == RTAX_NETMASK + 1 && sa != NULL && 1205 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 1206 /* 1207 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 1208 * We accept this for now for the sake of old 1209 * binaries or third party softwares. 1210 */ 1211 ; 1212 else 1213 return 1; 1214 } 1215 return 0; 1216 } 1217 1218 static int 1219 rt_getlen(int type) 1220 { 1221 #ifndef COMPAT_RTSOCK 1222 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 1223 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 1224 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 1225 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 1226 #endif 1227 1228 switch (type) { 1229 case RTM_ODELADDR: 1230 case RTM_ONEWADDR: 1231 case RTM_OCHGADDR: 1232 #ifdef COMPAT_70 1233 return sizeof(struct ifa_msghdr70); 1234 #else 1235 #ifdef RTSOCK_DEBUG 1236 printf("%s: unsupported RTM type %d\n", __func__, type); 1237 #endif 1238 return -1; 1239 #endif 1240 case RTM_DELADDR: 1241 case RTM_NEWADDR: 1242 case RTM_CHGADDR: 1243 return sizeof(struct ifa_xmsghdr); 1244 1245 case RTM_OOIFINFO: 1246 #ifdef COMPAT_14 1247 return sizeof(struct if_msghdr14); 1248 #else 1249 #ifdef RTSOCK_DEBUG 1250 printf("%s: unsupported RTM type RTM_OOIFINFO\n", __func__); 1251 #endif 1252 return -1; 1253 #endif 1254 case RTM_OIFINFO: 1255 #ifdef COMPAT_50 1256 return sizeof(struct if_msghdr50); 1257 #else 1258 #ifdef RTSOCK_DEBUG 1259 printf("%s: unsupported RTM type RTM_OIFINFO\n", __func__); 1260 #endif 1261 return -1; 1262 #endif 1263 1264 case RTM_IFINFO: 1265 return sizeof(struct if_xmsghdr); 1266 1267 case RTM_IFANNOUNCE: 1268 case RTM_IEEE80211: 1269 return sizeof(struct if_xannouncemsghdr); 1270 1271 default: 1272 return sizeof(struct rt_xmsghdr); 1273 } 1274 } 1275 1276 1277 struct mbuf * 1278 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 1279 { 1280 struct rt_xmsghdr *rtm; 1281 struct mbuf *m; 1282 int i; 1283 const struct sockaddr *sa; 1284 int len, dlen; 1285 1286 m = m_gethdr(M_DONTWAIT, MT_DATA); 1287 if (m == NULL) 1288 return m; 1289 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 1290 1291 if ((len = rt_getlen(type)) == -1) 1292 goto out; 1293 if (len > MHLEN + MLEN) 1294 panic("%s: message too long", __func__); 1295 else if (len > MHLEN) { 1296 m->m_next = m_get(M_DONTWAIT, MT_DATA); 1297 if (m->m_next == NULL) 1298 goto out; 1299 MCLAIM(m->m_next, m->m_owner); 1300 m->m_pkthdr.len = len; 1301 m->m_len = MHLEN; 1302 m->m_next->m_len = len - MHLEN; 1303 } else { 1304 m->m_pkthdr.len = m->m_len = len; 1305 } 1306 m_reset_rcvif(m); 1307 m_copyback(m, 0, datalen, data); 1308 if (len > datalen) 1309 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 1310 rtm = mtod(m, struct rt_xmsghdr *); 1311 for (i = 0; i < RTAX_MAX; i++) { 1312 if ((sa = rtinfo->rti_info[i]) == NULL) 1313 continue; 1314 rtinfo->rti_addrs |= (1 << i); 1315 dlen = RT_XROUNDUP(sa->sa_len); 1316 m_copyback(m, len, sa->sa_len, sa); 1317 if (dlen != sa->sa_len) { 1318 /* 1319 * Up to 6 + 1 nul's since roundup is to 1320 * sizeof(uint64_t) (8 bytes) 1321 */ 1322 m_copyback(m, len + sa->sa_len, 1323 dlen - sa->sa_len, "\0\0\0\0\0\0"); 1324 } 1325 len += dlen; 1326 } 1327 if (m->m_pkthdr.len != len) 1328 goto out; 1329 rtm->rtm_msglen = len; 1330 rtm->rtm_version = RTM_XVERSION; 1331 rtm->rtm_type = type; 1332 return m; 1333 out: 1334 m_freem(m); 1335 return NULL; 1336 } 1337 1338 /* 1339 * rt_msg2 1340 * 1341 * fills 'cp' or 'w'.w_tmem with the routing socket message and 1342 * returns the length of the message in 'lenp'. 1343 * 1344 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 1345 * the message 1346 * otherwise walkarg's w_needed is updated and if the user buffer is 1347 * specified and w_needed indicates space exists the information is copied 1348 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 1349 * if the allocation fails ENOBUFS is returned. 1350 */ 1351 static int 1352 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1353 int *lenp) 1354 { 1355 int i; 1356 int len, dlen, second_time = 0; 1357 char *cp0, *cp = cpv; 1358 1359 rtinfo->rti_addrs = 0; 1360 again: 1361 if ((len = rt_getlen(type)) == -1) 1362 return EINVAL; 1363 1364 if ((cp0 = cp) != NULL) 1365 cp += len; 1366 for (i = 0; i < RTAX_MAX; i++) { 1367 const struct sockaddr *sa; 1368 1369 if ((sa = rtinfo->rti_info[i]) == NULL) 1370 continue; 1371 rtinfo->rti_addrs |= (1 << i); 1372 dlen = RT_XROUNDUP(sa->sa_len); 1373 if (cp) { 1374 int diff = dlen - sa->sa_len; 1375 (void)memcpy(cp, sa, (size_t)sa->sa_len); 1376 cp += sa->sa_len; 1377 if (diff > 0) { 1378 (void)memset(cp, 0, (size_t)diff); 1379 cp += diff; 1380 } 1381 } 1382 len += dlen; 1383 } 1384 if (cp == NULL && w != NULL && !second_time) { 1385 struct rt_walkarg *rw = w; 1386 1387 rw->w_needed += len; 1388 if (rw->w_needed <= 0 && rw->w_where) { 1389 if (rw->w_tmemsize < len) { 1390 if (rw->w_tmem) 1391 kmem_free(rw->w_tmem, rw->w_tmemsize); 1392 rw->w_tmem = kmem_alloc(len, KM_SLEEP); 1393 rw->w_tmemsize = len; 1394 } 1395 if (rw->w_tmem) { 1396 cp = rw->w_tmem; 1397 second_time = 1; 1398 goto again; 1399 } else { 1400 rw->w_tmemneeded = len; 1401 return ENOBUFS; 1402 } 1403 } 1404 } 1405 if (cp) { 1406 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 1407 1408 rtm->rtm_version = RTM_XVERSION; 1409 rtm->rtm_type = type; 1410 rtm->rtm_msglen = len; 1411 } 1412 if (lenp) 1413 *lenp = len; 1414 return 0; 1415 } 1416 1417 #ifndef COMPAT_RTSOCK 1418 int 1419 rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1420 int *lenp) 1421 { 1422 return rt_msg2(type, rtinfo, cpv, w, lenp); 1423 } 1424 #endif 1425 1426 /* 1427 * This routine is called to generate a message from the routing 1428 * socket indicating that a redirect has occurred, a routing lookup 1429 * has failed, or that a protocol has detected timeouts to a particular 1430 * destination. 1431 */ 1432 void 1433 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 1434 int error) 1435 { 1436 struct rt_xmsghdr rtm; 1437 struct mbuf *m; 1438 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1439 struct rt_addrinfo info = *rtinfo; 1440 1441 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 1442 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1443 return; 1444 memset(&rtm, 0, sizeof(rtm)); 1445 rtm.rtm_pid = curproc->p_pid; 1446 rtm.rtm_flags = RTF_DONE | flags; 1447 rtm.rtm_errno = error; 1448 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 1449 if (m == NULL) 1450 return; 1451 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1452 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1453 } 1454 1455 /* 1456 * This routine is called to generate a message from the routing 1457 * socket indicating that the status of a network interface has changed. 1458 */ 1459 void 1460 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1461 { 1462 struct if_xmsghdr ifm; 1463 struct mbuf *m; 1464 struct rt_addrinfo info; 1465 1466 COMPATCALL(rt_ifmsg, (ifp)); 1467 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1468 return; 1469 (void)memset(&info, 0, sizeof(info)); 1470 (void)memset(&ifm, 0, sizeof(ifm)); 1471 ifm.ifm_index = ifp->if_index; 1472 ifm.ifm_flags = ifp->if_flags; 1473 ifm.ifm_data = ifp->if_data; 1474 ifm.ifm_addrs = 0; 1475 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1476 if (m == NULL) 1477 return; 1478 COMPATNAME(route_enqueue)(m, 0); 1479 #ifdef COMPAT_14 1480 compat_14_rt_oifmsg(ifp); 1481 #endif 1482 #ifdef COMPAT_50 1483 compat_50_rt_oifmsg(ifp); 1484 #endif 1485 } 1486 1487 #ifndef COMPAT_RTSOCK 1488 static int 1489 if_addrflags(struct ifaddr *ifa) 1490 { 1491 1492 switch (ifa->ifa_addr->sa_family) { 1493 #ifdef INET 1494 case AF_INET: 1495 return ((struct in_ifaddr *)ifa)->ia4_flags; 1496 #endif 1497 #ifdef INET6 1498 case AF_INET6: 1499 return ((struct in6_ifaddr *)ifa)->ia6_flags; 1500 #endif 1501 default: 1502 return 0; 1503 } 1504 } 1505 #endif 1506 1507 /* 1508 * This is called to generate messages from the routing socket 1509 * indicating a network interface has had addresses associated with it. 1510 * if we ever reverse the logic and replace messages TO the routing 1511 * socket indicate a request to configure interfaces, then it will 1512 * be unnecessary as the routing socket will automatically generate 1513 * copies of it. 1514 */ 1515 void 1516 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1517 struct rtentry *rt) 1518 { 1519 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1520 struct rt_addrinfo info; 1521 const struct sockaddr *sa; 1522 int pass; 1523 struct mbuf *m; 1524 struct ifnet *ifp; 1525 struct rt_xmsghdr rtm; 1526 struct ifa_xmsghdr ifam; 1527 int ncmd; 1528 1529 KASSERT(ifa != NULL); 1530 KASSERT(ifa->ifa_addr != NULL); 1531 ifp = ifa->ifa_ifp; 1532 #ifdef SCTP 1533 if (cmd == RTM_ADD) { 1534 sctp_add_ip_address(ifa); 1535 } else if (cmd == RTM_DELETE) { 1536 sctp_delete_ip_address(ifa); 1537 } 1538 #endif 1539 1540 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1541 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1542 return; 1543 for (pass = 1; pass < 3; pass++) { 1544 memset(&info, 0, sizeof(info)); 1545 switch (cmdpass(cmd, pass)) { 1546 case cmdpass(RTM_ADD, 1): 1547 case cmdpass(RTM_CHANGE, 1): 1548 case cmdpass(RTM_DELETE, 2): 1549 case cmdpass(RTM_NEWADDR, 1): 1550 case cmdpass(RTM_DELADDR, 1): 1551 case cmdpass(RTM_CHGADDR, 1): 1552 switch (cmd) { 1553 case RTM_ADD: 1554 ncmd = RTM_XNEWADDR; 1555 break; 1556 case RTM_DELETE: 1557 ncmd = RTM_XDELADDR; 1558 break; 1559 case RTM_CHANGE: 1560 ncmd = RTM_XCHGADDR; 1561 break; 1562 case RTM_NEWADDR: 1563 ncmd = RTM_XNEWADDR; 1564 break; 1565 case RTM_DELADDR: 1566 ncmd = RTM_XDELADDR; 1567 break; 1568 case RTM_CHGADDR: 1569 ncmd = RTM_XCHGADDR; 1570 break; 1571 default: 1572 panic("%s: unknown command %d", __func__, cmd); 1573 } 1574 #ifdef COMPAT_70 1575 compat_70_rt_newaddrmsg1(ncmd, ifa); 1576 #endif 1577 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1578 KASSERT(ifp->if_dl != NULL); 1579 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1580 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1581 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1582 memset(&ifam, 0, sizeof(ifam)); 1583 ifam.ifam_index = ifp->if_index; 1584 ifam.ifam_metric = ifa->ifa_metric; 1585 ifam.ifam_flags = ifa->ifa_flags; 1586 #ifndef COMPAT_RTSOCK 1587 ifam.ifam_pid = curproc->p_pid; 1588 ifam.ifam_addrflags = if_addrflags(ifa); 1589 #endif 1590 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1591 if (m == NULL) 1592 continue; 1593 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1594 info.rti_addrs; 1595 break; 1596 case cmdpass(RTM_ADD, 2): 1597 case cmdpass(RTM_CHANGE, 2): 1598 case cmdpass(RTM_DELETE, 1): 1599 if (rt == NULL) 1600 continue; 1601 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1602 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1603 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1604 memset(&rtm, 0, sizeof(rtm)); 1605 rtm.rtm_pid = curproc->p_pid; 1606 rtm.rtm_index = ifp->if_index; 1607 rtm.rtm_flags |= rt->rt_flags; 1608 rtm.rtm_errno = error; 1609 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1610 if (m == NULL) 1611 continue; 1612 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1613 break; 1614 default: 1615 continue; 1616 } 1617 KASSERTMSG(m != NULL, "called with wrong command"); 1618 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1619 } 1620 #undef cmdpass 1621 1622 } 1623 1624 static struct mbuf * 1625 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1626 struct rt_addrinfo *info) 1627 { 1628 struct if_xannouncemsghdr ifan; 1629 1630 memset(info, 0, sizeof(*info)); 1631 memset(&ifan, 0, sizeof(ifan)); 1632 ifan.ifan_index = ifp->if_index; 1633 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1634 ifan.ifan_what = what; 1635 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1636 } 1637 1638 /* 1639 * This is called to generate routing socket messages indicating 1640 * network interface arrival and departure. 1641 */ 1642 void 1643 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1644 { 1645 struct mbuf *m; 1646 struct rt_addrinfo info; 1647 1648 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1649 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1650 return; 1651 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1652 if (m == NULL) 1653 return; 1654 COMPATNAME(route_enqueue)(m, 0); 1655 } 1656 1657 /* 1658 * This is called to generate routing socket messages indicating 1659 * IEEE80211 wireless events. 1660 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1661 */ 1662 void 1663 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1664 size_t data_len) 1665 { 1666 struct mbuf *m; 1667 struct rt_addrinfo info; 1668 1669 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1670 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1671 return; 1672 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1673 if (m == NULL) 1674 return; 1675 /* 1676 * Append the ieee80211 data. Try to stick it in the 1677 * mbuf containing the ifannounce msg; otherwise allocate 1678 * a new mbuf and append. 1679 * 1680 * NB: we assume m is a single mbuf. 1681 */ 1682 if (data_len > M_TRAILINGSPACE(m)) { 1683 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1684 if (n == NULL) { 1685 m_freem(m); 1686 return; 1687 } 1688 (void)memcpy(mtod(n, void *), data, data_len); 1689 n->m_len = data_len; 1690 m->m_next = n; 1691 } else if (data_len > 0) { 1692 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1693 m->m_len += data_len; 1694 } 1695 if (m->m_flags & M_PKTHDR) 1696 m->m_pkthdr.len += data_len; 1697 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1698 COMPATNAME(route_enqueue)(m, 0); 1699 } 1700 1701 #ifndef COMPAT_RTSOCK 1702 /* 1703 * Send a routing message as mimicing that a cloned route is added. 1704 */ 1705 void 1706 rt_clonedmsg(const struct sockaddr *dst, const struct ifnet *ifp, 1707 const struct rtentry *rt) 1708 { 1709 struct rt_addrinfo info; 1710 /* Mimic flags exactly */ 1711 #define RTF_LLINFO 0x400 1712 #define RTF_CLONED 0x2000 1713 int flags = RTF_UP | RTF_HOST | RTF_DONE | RTF_LLINFO | RTF_CLONED; 1714 union { 1715 struct sockaddr sa; 1716 struct sockaddr_storage ss; 1717 struct sockaddr_dl sdl; 1718 } u; 1719 uint8_t namelen = strlen(ifp->if_xname); 1720 uint8_t addrlen = ifp->if_addrlen; 1721 1722 if (rt == NULL) 1723 return; /* XXX */ 1724 1725 memset(&info, 0, sizeof(info)); 1726 info.rti_info[RTAX_DST] = dst; 1727 sockaddr_dl_init(&u.sdl, sizeof(u.ss), ifp->if_index, ifp->if_type, 1728 NULL, namelen, NULL, addrlen); 1729 info.rti_info[RTAX_GATEWAY] = &u.sa; 1730 1731 rt_missmsg(RTM_ADD, &info, flags, 0); 1732 #undef RTF_LLINFO 1733 #undef RTF_CLONED 1734 } 1735 #endif /* COMPAT_RTSOCK */ 1736 1737 /* 1738 * This is used in dumping the kernel table via sysctl(). 1739 */ 1740 static int 1741 sysctl_dumpentry(struct rtentry *rt, void *v) 1742 { 1743 struct rt_walkarg *w = v; 1744 int error = 0, size; 1745 struct rt_addrinfo info; 1746 1747 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1748 return 0; 1749 memset(&info, 0, sizeof(info)); 1750 info.rti_info[RTAX_DST] = rt_getkey(rt); 1751 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1752 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1753 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1754 if (rt->rt_ifp) { 1755 const struct ifaddr *rtifa; 1756 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1757 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1758 * then rt_get_ifa() != NULL. So this ought to still be safe. 1759 * --dyoung 1760 */ 1761 rtifa = rt_get_ifa(rt); 1762 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1763 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1764 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1765 } 1766 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1767 return error; 1768 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1769 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1770 1771 rtm->rtm_flags = rt->rt_flags; 1772 rtm->rtm_use = rt->rt_use; 1773 rtm_setmetrics(rt, rtm); 1774 KASSERT(rt->rt_ifp != NULL); 1775 rtm->rtm_index = rt->rt_ifp->if_index; 1776 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1777 rtm->rtm_addrs = info.rti_addrs; 1778 if ((error = copyout(rtm, w->w_where, size)) != 0) 1779 w->w_where = NULL; 1780 else 1781 w->w_where = (char *)w->w_where + size; 1782 } 1783 return error; 1784 } 1785 1786 static int 1787 sysctl_iflist_if(struct ifnet *ifp, struct rt_walkarg *w, 1788 struct rt_addrinfo *info, size_t len) 1789 { 1790 struct if_xmsghdr *ifm; 1791 int error; 1792 1793 ifm = (struct if_xmsghdr *)w->w_tmem; 1794 ifm->ifm_index = ifp->if_index; 1795 ifm->ifm_flags = ifp->if_flags; 1796 ifm->ifm_data = ifp->if_data; 1797 ifm->ifm_addrs = info->rti_addrs; 1798 if ((error = copyout(ifm, w->w_where, len)) == 0) 1799 w->w_where = (char *)w->w_where + len; 1800 return error; 1801 } 1802 1803 static int 1804 sysctl_iflist_addr(struct rt_walkarg *w, struct ifaddr *ifa, 1805 struct rt_addrinfo *info) 1806 { 1807 int len, error; 1808 1809 if ((error = rt_msg2(RTM_XNEWADDR, info, 0, w, &len))) 1810 return error; 1811 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1812 struct ifa_xmsghdr *ifam; 1813 1814 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1815 ifam->ifam_index = ifa->ifa_ifp->if_index; 1816 ifam->ifam_flags = ifa->ifa_flags; 1817 ifam->ifam_metric = ifa->ifa_metric; 1818 ifam->ifam_addrs = info->rti_addrs; 1819 #ifndef COMPAT_RTSOCK 1820 ifam->ifam_pid = 0; 1821 ifam->ifam_addrflags = if_addrflags(ifa); 1822 #endif 1823 if ((error = copyout(w->w_tmem, w->w_where, len)) == 0) 1824 w->w_where = (char *)w->w_where + len; 1825 } 1826 return error; 1827 } 1828 1829 static int 1830 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1831 { 1832 struct ifnet *ifp; 1833 struct ifaddr *ifa; 1834 struct rt_addrinfo info; 1835 int cmd, len, error = 0; 1836 int (*iflist_if)(struct ifnet *, struct rt_walkarg *, 1837 struct rt_addrinfo *, size_t); 1838 int (*iflist_addr)(struct rt_walkarg *, struct ifaddr *, 1839 struct rt_addrinfo *); 1840 int s; 1841 struct psref psref; 1842 int bound; 1843 1844 switch (type) { 1845 case NET_RT_IFLIST: 1846 cmd = RTM_IFINFO; 1847 iflist_if = sysctl_iflist_if; 1848 iflist_addr = sysctl_iflist_addr; 1849 break; 1850 #ifdef COMPAT_14 1851 case NET_RT_OOOIFLIST: 1852 cmd = RTM_OOIFINFO; 1853 iflist_if = compat_14_iflist; 1854 iflist_addr = compat_70_iflist_addr; 1855 break; 1856 #endif 1857 #ifdef COMPAT_50 1858 case NET_RT_OOIFLIST: 1859 cmd = RTM_OIFINFO; 1860 iflist_if = compat_50_iflist; 1861 iflist_addr = compat_70_iflist_addr; 1862 break; 1863 #endif 1864 #ifdef COMPAT_70 1865 case NET_RT_OIFLIST: 1866 cmd = RTM_IFINFO; 1867 iflist_if = sysctl_iflist_if; 1868 iflist_addr = compat_70_iflist_addr; 1869 break; 1870 #endif 1871 default: 1872 #ifdef RTSOCK_DEBUG 1873 printf("%s: unsupported IFLIST type %d\n", __func__, type); 1874 #endif 1875 return EINVAL; 1876 } 1877 1878 memset(&info, 0, sizeof(info)); 1879 1880 bound = curlwp_bind(); 1881 s = pserialize_read_enter(); 1882 IFNET_READER_FOREACH(ifp) { 1883 int _s; 1884 if (w->w_arg && w->w_arg != ifp->if_index) 1885 continue; 1886 if (IFADDR_READER_EMPTY(ifp)) 1887 continue; 1888 1889 if_acquire(ifp, &psref); 1890 pserialize_read_exit(s); 1891 1892 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1893 if ((error = rt_msg2(cmd, &info, NULL, w, &len)) != 0) 1894 goto release_exit; 1895 info.rti_info[RTAX_IFP] = NULL; 1896 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1897 if ((error = iflist_if(ifp, w, &info, len)) != 0) 1898 goto release_exit; 1899 } 1900 _s = pserialize_read_enter(); 1901 IFADDR_READER_FOREACH(ifa, ifp) { 1902 struct psref _psref; 1903 if (af && af != ifa->ifa_addr->sa_family) 1904 continue; 1905 ifa_acquire(ifa, &_psref); 1906 pserialize_read_exit(_s); 1907 1908 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1909 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1910 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1911 error = iflist_addr(w, ifa, &info); 1912 1913 _s = pserialize_read_enter(); 1914 ifa_release(ifa, &_psref); 1915 if (error != 0) { 1916 pserialize_read_exit(_s); 1917 goto release_exit; 1918 } 1919 } 1920 pserialize_read_exit(_s); 1921 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1922 info.rti_info[RTAX_BRD] = NULL; 1923 1924 s = pserialize_read_enter(); 1925 if_release(ifp, &psref); 1926 } 1927 pserialize_read_exit(s); 1928 curlwp_bindx(bound); 1929 1930 return 0; 1931 1932 release_exit: 1933 if_release(ifp, &psref); 1934 curlwp_bindx(bound); 1935 return error; 1936 } 1937 1938 static int 1939 sysctl_rtable(SYSCTLFN_ARGS) 1940 { 1941 void *where = oldp; 1942 size_t *given = oldlenp; 1943 int i, s, error = EINVAL; 1944 u_char af; 1945 struct rt_walkarg w; 1946 1947 if (namelen == 1 && name[0] == CTL_QUERY) 1948 return sysctl_query(SYSCTLFN_CALL(rnode)); 1949 1950 if (newp) 1951 return EPERM; 1952 if (namelen != 3) 1953 return EINVAL; 1954 af = name[0]; 1955 w.w_tmemneeded = 0; 1956 w.w_tmemsize = 0; 1957 w.w_tmem = NULL; 1958 again: 1959 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1960 if (w.w_tmemneeded) { 1961 w.w_tmem = kmem_alloc(w.w_tmemneeded, KM_SLEEP); 1962 w.w_tmemsize = w.w_tmemneeded; 1963 w.w_tmemneeded = 0; 1964 } 1965 w.w_op = name[1]; 1966 w.w_arg = name[2]; 1967 w.w_given = *given; 1968 w.w_needed = 0 - w.w_given; 1969 w.w_where = where; 1970 1971 s = splsoftnet(); 1972 switch (w.w_op) { 1973 1974 case NET_RT_DUMP: 1975 case NET_RT_FLAGS: 1976 #if defined(INET) || defined(INET6) 1977 /* 1978 * take care of llinfo entries, the caller must 1979 * specify an AF 1980 */ 1981 if (w.w_op == NET_RT_FLAGS && 1982 (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { 1983 if (af != 0) 1984 error = lltable_sysctl_dump(af, &w); 1985 else 1986 error = EINVAL; 1987 break; 1988 } 1989 #endif 1990 1991 for (i = 1; i <= AF_MAX; i++) { 1992 if (af == 0 || af == i) { 1993 error = rt_walktree(i, sysctl_dumpentry, &w); 1994 if (error != 0) 1995 break; 1996 #if defined(INET) || defined(INET6) 1997 /* 1998 * Return ARP/NDP entries too for 1999 * backward compatibility. 2000 */ 2001 error = lltable_sysctl_dump(i, &w); 2002 if (error != 0) 2003 break; 2004 #endif 2005 } 2006 } 2007 break; 2008 2009 #ifdef COMPAT_14 2010 case NET_RT_OOOIFLIST: 2011 error = sysctl_iflist(af, &w, w.w_op); 2012 break; 2013 #endif 2014 #ifdef COMPAT_50 2015 case NET_RT_OOIFLIST: 2016 error = sysctl_iflist(af, &w, w.w_op); 2017 break; 2018 #endif 2019 #ifdef COMPAT_70 2020 case NET_RT_OIFLIST: 2021 error = sysctl_iflist(af, &w, w.w_op); 2022 break; 2023 #endif 2024 case NET_RT_IFLIST: 2025 error = sysctl_iflist(af, &w, w.w_op); 2026 break; 2027 } 2028 splx(s); 2029 2030 /* check to see if we couldn't allocate memory with NOWAIT */ 2031 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 2032 goto again; 2033 2034 if (w.w_tmem) 2035 kmem_free(w.w_tmem, w.w_tmemsize); 2036 w.w_needed += w.w_given; 2037 if (where) { 2038 *given = (char *)w.w_where - (char *)where; 2039 if (*given < w.w_needed) 2040 return ENOMEM; 2041 } else { 2042 *given = (11 * w.w_needed) / 10; 2043 } 2044 return error; 2045 } 2046 2047 /* 2048 * Routing message software interrupt routine 2049 */ 2050 static void 2051 COMPATNAME(route_intr)(void *cookie) 2052 { 2053 struct sockproto proto = { .sp_family = PF_XROUTE, }; 2054 struct route_info * const ri = &COMPATNAME(route_info); 2055 struct mbuf *m; 2056 2057 SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE(); 2058 for (;;) { 2059 IFQ_LOCK(&ri->ri_intrq); 2060 IF_DEQUEUE(&ri->ri_intrq, m); 2061 IFQ_UNLOCK(&ri->ri_intrq); 2062 if (m == NULL) 2063 break; 2064 proto.sp_protocol = M_GETCTX(m, uintptr_t); 2065 #ifdef NET_MPSAFE 2066 mutex_enter(rt_so_mtx); 2067 #endif 2068 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst, &rt_rawcb); 2069 #ifdef NET_MPSAFE 2070 mutex_exit(rt_so_mtx); 2071 #endif 2072 } 2073 SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); 2074 } 2075 2076 /* 2077 * Enqueue a message to the software interrupt routine. 2078 */ 2079 void 2080 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 2081 { 2082 struct route_info * const ri = &COMPATNAME(route_info); 2083 int wasempty; 2084 2085 IFQ_LOCK(&ri->ri_intrq); 2086 if (IF_QFULL(&ri->ri_intrq)) { 2087 IF_DROP(&ri->ri_intrq); 2088 IFQ_UNLOCK(&ri->ri_intrq); 2089 m_freem(m); 2090 } else { 2091 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 2092 M_SETCTX(m, (uintptr_t)family); 2093 IF_ENQUEUE(&ri->ri_intrq, m); 2094 IFQ_UNLOCK(&ri->ri_intrq); 2095 if (wasempty) { 2096 kpreempt_disable(); 2097 softint_schedule(ri->ri_sih); 2098 kpreempt_enable(); 2099 } 2100 } 2101 } 2102 2103 static void 2104 COMPATNAME(route_init)(void) 2105 { 2106 struct route_info * const ri = &COMPATNAME(route_info); 2107 2108 #ifndef COMPAT_RTSOCK 2109 rt_init(); 2110 #endif 2111 #ifdef NET_MPSAFE 2112 rt_so_mtx = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE); 2113 #endif 2114 2115 sysctl_net_route_setup(NULL); 2116 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 2117 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 2118 COMPATNAME(route_intr), NULL); 2119 IFQ_LOCK_INIT(&ri->ri_intrq); 2120 } 2121 2122 /* 2123 * Definitions of protocols supported in the ROUTE domain. 2124 */ 2125 #ifndef COMPAT_RTSOCK 2126 PR_WRAP_USRREQS(route); 2127 #else 2128 PR_WRAP_USRREQS(compat_50_route); 2129 #endif 2130 2131 static const struct pr_usrreqs route_usrreqs = { 2132 .pr_attach = COMPATNAME(route_attach_wrapper), 2133 .pr_detach = COMPATNAME(route_detach_wrapper), 2134 .pr_accept = COMPATNAME(route_accept_wrapper), 2135 .pr_bind = COMPATNAME(route_bind_wrapper), 2136 .pr_listen = COMPATNAME(route_listen_wrapper), 2137 .pr_connect = COMPATNAME(route_connect_wrapper), 2138 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 2139 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 2140 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 2141 .pr_abort = COMPATNAME(route_abort_wrapper), 2142 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 2143 .pr_stat = COMPATNAME(route_stat_wrapper), 2144 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 2145 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 2146 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 2147 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 2148 .pr_send = COMPATNAME(route_send_wrapper), 2149 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 2150 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 2151 }; 2152 2153 static const struct protosw COMPATNAME(route_protosw)[] = { 2154 { 2155 .pr_type = SOCK_RAW, 2156 .pr_domain = &COMPATNAME(routedomain), 2157 .pr_flags = PR_ATOMIC|PR_ADDR, 2158 .pr_input = raw_input, 2159 .pr_ctlinput = raw_ctlinput, 2160 .pr_ctloutput = route_ctloutput, 2161 .pr_usrreqs = &route_usrreqs, 2162 .pr_init = rt_pr_init, 2163 }, 2164 }; 2165 2166 struct domain COMPATNAME(routedomain) = { 2167 .dom_family = PF_XROUTE, 2168 .dom_name = DOMAINNAME, 2169 .dom_init = COMPATNAME(route_init), 2170 .dom_protosw = COMPATNAME(route_protosw), 2171 .dom_protoswNPROTOSW = 2172 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 2173 }; 2174 2175 static void 2176 sysctl_net_route_setup(struct sysctllog **clog) 2177 { 2178 const struct sysctlnode *rnode = NULL; 2179 2180 sysctl_createv(clog, 0, NULL, &rnode, 2181 CTLFLAG_PERMANENT, 2182 CTLTYPE_NODE, DOMAINNAME, 2183 SYSCTL_DESCR("PF_ROUTE information"), 2184 NULL, 0, NULL, 0, 2185 CTL_NET, PF_XROUTE, CTL_EOL); 2186 2187 sysctl_createv(clog, 0, NULL, NULL, 2188 CTLFLAG_PERMANENT, 2189 CTLTYPE_NODE, "rtable", 2190 SYSCTL_DESCR("Routing table information"), 2191 sysctl_rtable, 0, NULL, 0, 2192 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 2193 2194 sysctl_createv(clog, 0, &rnode, NULL, 2195 CTLFLAG_PERMANENT, 2196 CTLTYPE_STRUCT, "stats", 2197 SYSCTL_DESCR("Routing statistics"), 2198 NULL, 0, &rtstat, sizeof(rtstat), 2199 CTL_CREATE, CTL_EOL); 2200 } 2201
Indexes created Tue Sep 23 07:09:52 GMT 2025