rtsock.c revision 1.233
1 /* $NetBSD: rtsock.c,v 1.233 2017/12/14 05:47:45 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 1.233 2017/12/14 05:47:45 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 if (info.rti_info[RTAX_IFA] == NULL) { 626 /* route change <dst> <gw> -ifp <if> */ 627 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_GATEWAY], 628 *ifp, psref); 629 } else { 630 /* route change <dst> -ifp <if> -ifa <addr> */ 631 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 632 if (ifa != NULL) 633 goto out; 634 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_IFA], 635 *ifp, psref); 636 } 637 goto out; 638 } 639 next: 640 if (info.rti_info[RTAX_IFA] != NULL) { 641 /* route change <dst> <gw> -ifa <addr> */ 642 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 643 if (ifa != NULL) 644 goto out; 645 } 646 if (info.rti_info[RTAX_GATEWAY] != NULL) { 647 /* route change <dst> <gw> */ 648 ifa = ifa_ifwithroute_psref(rt->rt_flags, rt_getkey(rt), 649 info.rti_info[RTAX_GATEWAY], psref); 650 } 651 out: 652 if (ifa != NULL && *ifp == NULL) { 653 *ifp = ifa->ifa_ifp; 654 if_acquire(*ifp, psref_ifp); 655 } 656 if (ifa == NULL && *ifp != NULL) { 657 if_put(*ifp, psref_ifp); 658 *ifp = NULL; 659 } 660 return ifa; 661 } 662 663 static int __noinline 664 route_output_change(struct rtentry *rt, struct rt_addrinfo *info, 665 struct rt_xmsghdr *rtm) 666 { 667 int error = 0; 668 struct ifnet *ifp = NULL, *new_ifp; 669 struct ifaddr *ifa = NULL, *new_ifa; 670 struct psref psref_ifa, psref_new_ifa, psref_ifp, psref_new_ifp; 671 bool newgw, ifp_changed = false; 672 673 /* 674 * New gateway could require new ifaddr, ifp; 675 * flags may also be different; ifp may be specified 676 * by ll sockaddr when protocol address is ambiguous 677 */ 678 newgw = info->rti_info[RTAX_GATEWAY] != NULL && 679 sockaddr_cmp(info->rti_info[RTAX_GATEWAY], rt->rt_gateway) != 0; 680 681 if (newgw || info->rti_info[RTAX_IFP] != NULL || 682 info->rti_info[RTAX_IFA] != NULL) { 683 ifp = rt_getifp(info, &psref_ifp); 684 /* info refers ifp so we need to keep a reference */ 685 ifa = rt_getifa(info, &psref_ifa); 686 if (ifa == NULL) { 687 error = ENETUNREACH; 688 goto out; 689 } 690 } 691 if (newgw) { 692 error = rt_setgate(rt, info->rti_info[RTAX_GATEWAY]); 693 if (error != 0) 694 goto out; 695 } 696 if (info->rti_info[RTAX_TAG]) { 697 const struct sockaddr *tag; 698 tag = rt_settag(rt, info->rti_info[RTAX_TAG]); 699 if (tag == NULL) { 700 error = ENOBUFS; 701 goto out; 702 } 703 } 704 /* 705 * New gateway could require new ifaddr, ifp; 706 * flags may also be different; ifp may be specified 707 * by ll sockaddr when protocol address is ambiguous 708 */ 709 new_ifa = route_output_get_ifa(*info, rt, &new_ifp, &psref_new_ifp, 710 &psref_new_ifa); 711 if (new_ifa != NULL) { 712 ifa_release(ifa, &psref_ifa); 713 ifa = new_ifa; 714 } 715 if (ifa) { 716 struct ifaddr *oifa = rt->rt_ifa; 717 if (oifa != ifa && !ifa_is_destroying(ifa) && 718 new_ifp != NULL && !if_is_deactivated(new_ifp)) { 719 if (oifa && oifa->ifa_rtrequest) 720 oifa->ifa_rtrequest(RTM_DELETE, rt, info); 721 rt_replace_ifa(rt, ifa); 722 rt->rt_ifp = new_ifp; 723 ifp_changed = true; 724 } 725 if (new_ifa == NULL) 726 ifa_release(ifa, &psref_ifa); 727 } 728 ifa_release(new_ifa, &psref_new_ifa); 729 if (new_ifp && rt->rt_ifp != new_ifp && !if_is_deactivated(new_ifp)) { 730 rt->rt_ifp = new_ifp; 731 ifp_changed = true; 732 } 733 rt_setmetrics(rtm->rtm_inits, rtm, rt); 734 if (rt->rt_flags != info->rti_flags) { 735 rt->rt_flags = (info->rti_flags & ~PRESERVED_RTF) | 736 (rt->rt_flags & PRESERVED_RTF); 737 } 738 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 739 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info); 740 #if defined(INET) || defined(INET6) 741 if (ifp_changed && rt_mask(rt) != NULL) 742 lltable_prefix_free(rt_getkey(rt)->sa_family, rt_getkey(rt), 743 rt_mask(rt), 0); 744 #else 745 (void)ifp_changed; /* XXX gcc */ 746 #endif 747 out: 748 if_put(new_ifp, &psref_new_ifp); 749 if_put(ifp, &psref_ifp); 750 751 return error; 752 } 753 754 /*ARGSUSED*/ 755 int 756 COMPATNAME(route_output)(struct mbuf *m, struct socket *so) 757 { 758 struct sockproto proto = { .sp_family = PF_XROUTE, }; 759 struct rt_xmsghdr *rtm = NULL; 760 struct rt_xmsghdr *old_rtm = NULL, *new_rtm = NULL; 761 struct rtentry *rt = NULL; 762 struct rtentry *saved_nrt = NULL; 763 struct rt_addrinfo info; 764 int len, error = 0; 765 sa_family_t family; 766 struct sockaddr_dl sdl; 767 int bound = curlwp_bind(); 768 bool do_rt_free = false; 769 struct sockaddr_storage netmask; 770 771 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 772 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 773 (m = m_pullup(m, sizeof(int32_t))) == NULL)) { 774 error = ENOBUFS; 775 goto out; 776 } 777 if ((m->m_flags & M_PKTHDR) == 0) 778 panic("%s", __func__); 779 len = m->m_pkthdr.len; 780 if (len < sizeof(*rtm) || 781 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 782 info.rti_info[RTAX_DST] = NULL; 783 senderr(EINVAL); 784 } 785 R_Malloc(rtm, struct rt_xmsghdr *, len); 786 if (rtm == NULL) { 787 info.rti_info[RTAX_DST] = NULL; 788 senderr(ENOBUFS); 789 } 790 m_copydata(m, 0, len, rtm); 791 if (rtm->rtm_version != RTM_XVERSION) { 792 info.rti_info[RTAX_DST] = NULL; 793 senderr(EPROTONOSUPPORT); 794 } 795 rtm->rtm_pid = curproc->p_pid; 796 memset(&info, 0, sizeof(info)); 797 info.rti_addrs = rtm->rtm_addrs; 798 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 799 &info)) { 800 senderr(EINVAL); 801 } 802 info.rti_flags = rtm->rtm_flags; 803 #ifdef RTSOCK_DEBUG 804 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 805 char abuf[INET_ADDRSTRLEN]; 806 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 807 RT_IN_PRINT(&info, abuf, RTAX_DST)); 808 } 809 #endif /* RTSOCK_DEBUG */ 810 if (info.rti_info[RTAX_DST] == NULL || 811 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 812 senderr(EINVAL); 813 } 814 if (info.rti_info[RTAX_GATEWAY] != NULL && 815 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 816 senderr(EINVAL); 817 } 818 819 /* 820 * Verify that the caller has the appropriate privilege; RTM_GET 821 * is the only operation the non-superuser is allowed. 822 */ 823 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 824 0, rtm, NULL, NULL) != 0) 825 senderr(EACCES); 826 827 /* 828 * route(8) passes a sockaddr truncated with prefixlen. 829 * The kernel doesn't expect such sockaddr and need to 830 * use a buffer that is big enough for the sockaddr expected 831 * (padded with 0's). We keep the original length of the sockaddr. 832 */ 833 if (info.rti_info[RTAX_NETMASK]) { 834 /* 835 * Use the family of RTAX_DST, because RTAX_NETMASK 836 * can have a zero family if it comes from the radix 837 * tree via rt_mask(). 838 */ 839 socklen_t sa_len = sockaddr_getsize_by_family( 840 info.rti_info[RTAX_DST]->sa_family); 841 socklen_t masklen = sockaddr_getlen( 842 info.rti_info[RTAX_NETMASK]); 843 if (sa_len != 0 && sa_len > masklen) { 844 KASSERT(sa_len <= sizeof(netmask)); 845 memcpy(&netmask, info.rti_info[RTAX_NETMASK], masklen); 846 memset((char *)&netmask + masklen, 0, sa_len - masklen); 847 info.rti_info[RTAX_NETMASK] = sstocsa(&netmask); 848 } 849 } 850 851 switch (rtm->rtm_type) { 852 853 case RTM_ADD: 854 if (info.rti_info[RTAX_GATEWAY] == NULL) { 855 senderr(EINVAL); 856 } 857 #if defined(INET) || defined(INET6) 858 /* support for new ARP/NDP code with keeping backcompat */ 859 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { 860 const struct sockaddr_dl *sdlp = 861 satocsdl(info.rti_info[RTAX_GATEWAY]); 862 863 /* Allow routing requests by interface index */ 864 if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 865 && sdlp->sdl_slen == 0) 866 goto fallback; 867 /* 868 * Old arp binaries don't set the sdl_index 869 * so we have to complement it. 870 */ 871 int sdl_index = sdlp->sdl_index; 872 if (sdl_index == 0) { 873 error = route_get_sdl_index(&info, &sdl_index); 874 if (error != 0) 875 goto fallback; 876 } else if ( 877 info.rti_info[RTAX_DST]->sa_family == AF_INET) { 878 /* 879 * XXX workaround for SIN_PROXY case; proxy arp 880 * entry should be in an interface that has 881 * a network route including the destination, 882 * not a local (link) route that may not be a 883 * desired place, for example a tap. 884 */ 885 const struct sockaddr_inarp *sina = 886 (const struct sockaddr_inarp *) 887 info.rti_info[RTAX_DST]; 888 if (sina->sin_other & SIN_PROXY) { 889 error = route_get_sdl_index(&info, 890 &sdl_index); 891 if (error != 0) 892 goto fallback; 893 } 894 } 895 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 896 rtm->rtm_rmx.rmx_expire, &info, sdl_index); 897 break; 898 } 899 fallback: 900 #endif /* defined(INET) || defined(INET6) */ 901 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 902 if (error == 0) { 903 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 904 rt_unref(saved_nrt); 905 } 906 break; 907 908 case RTM_DELETE: 909 #if defined(INET) || defined(INET6) 910 /* support for new ARP/NDP code */ 911 if (info.rti_info[RTAX_GATEWAY] && 912 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 913 (rtm->rtm_flags & RTF_LLDATA) != 0) { 914 const struct sockaddr_dl *sdlp = 915 satocsdl(info.rti_info[RTAX_GATEWAY]); 916 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 917 rtm->rtm_rmx.rmx_expire, &info, sdlp->sdl_index); 918 rtm->rtm_flags &= ~RTF_UP; 919 break; 920 } 921 #endif 922 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 923 if (error != 0) 924 break; 925 926 rt = saved_nrt; 927 do_rt_free = true; 928 info.rti_info[RTAX_DST] = rt_getkey(rt); 929 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 930 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 931 info.rti_info[RTAX_TAG] = rt_gettag(rt); 932 error = route_output_report(rt, &info, rtm, &new_rtm); 933 if (error) 934 senderr(error); 935 if (new_rtm != NULL) { 936 old_rtm = rtm; 937 rtm = new_rtm; 938 } 939 break; 940 941 case RTM_GET: 942 case RTM_CHANGE: 943 case RTM_LOCK: 944 /* XXX This will mask info.rti_info[RTAX_DST] with 945 * info.rti_info[RTAX_NETMASK] before 946 * searching. It did not used to do that. --dyoung 947 */ 948 rt = NULL; 949 error = rtrequest1(RTM_GET, &info, &rt); 950 if (error != 0) 951 senderr(error); 952 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 953 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 954 info.rti_info[RTAX_DST]->sa_len) != 0) 955 senderr(ESRCH); 956 if (info.rti_info[RTAX_NETMASK] == NULL && 957 rt_mask(rt) != NULL) 958 senderr(ETOOMANYREFS); 959 } 960 961 /* 962 * XXX if arp/ndp requests an L2 entry, we have to obtain 963 * it from lltable while for the route command we have to 964 * return a route as it is. How to distinguish them? 965 * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp 966 * indicates an L2 entry is requested. For old arp/ndp 967 * binaries, we check RTF_UP flag is NOT set; it works 968 * by the fact that arp/ndp don't set it while the route 969 * command sets it. 970 */ 971 if (((rtm->rtm_flags & RTF_LLDATA) != 0 || 972 (rtm->rtm_flags & RTF_UP) == 0) && 973 rtm->rtm_type == RTM_GET && 974 sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { 975 int ll_flags = 0; 976 route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, 977 &ll_flags); 978 info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); 979 error = route_output_report(rt, &info, rtm, &new_rtm); 980 if (error) 981 senderr(error); 982 if (new_rtm != NULL) { 983 old_rtm = rtm; 984 rtm = new_rtm; 985 } 986 rtm->rtm_flags |= RTF_LLDATA; 987 rtm->rtm_flags &= ~RTF_CONNECTED; 988 rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; 989 break; 990 } 991 992 switch (rtm->rtm_type) { 993 case RTM_GET: 994 info.rti_info[RTAX_DST] = rt_getkey(rt); 995 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 996 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 997 info.rti_info[RTAX_TAG] = rt_gettag(rt); 998 error = route_output_report(rt, &info, rtm, &new_rtm); 999 if (error) 1000 senderr(error); 1001 if (new_rtm != NULL) { 1002 old_rtm = rtm; 1003 rtm = new_rtm; 1004 } 1005 break; 1006 1007 case RTM_CHANGE: 1008 #ifdef NET_MPSAFE 1009 error = rt_update_prepare(rt); 1010 if (error == 0) { 1011 error = route_output_change(rt, &info, rtm); 1012 rt_update_finish(rt); 1013 } 1014 #else 1015 error = route_output_change(rt, &info, rtm); 1016 #endif 1017 if (error != 0) 1018 goto flush; 1019 /*FALLTHROUGH*/ 1020 case RTM_LOCK: 1021 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 1022 rt->rt_rmx.rmx_locks |= 1023 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 1024 break; 1025 } 1026 break; 1027 1028 default: 1029 senderr(EOPNOTSUPP); 1030 } 1031 1032 flush: 1033 if (rtm) { 1034 if (error) 1035 rtm->rtm_errno = error; 1036 else 1037 rtm->rtm_flags |= RTF_DONE; 1038 } 1039 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 1040 0; 1041 /* We cannot free old_rtm until we have stopped using the 1042 * pointers in info, some of which may point to sockaddrs 1043 * in old_rtm. 1044 */ 1045 if (old_rtm != NULL) 1046 Free(old_rtm); 1047 if (rt) { 1048 if (do_rt_free) 1049 rt_free(rt); 1050 else 1051 rt_unref(rt); 1052 } 1053 { 1054 struct rawcb *rp = NULL; 1055 /* 1056 * Check to see if we don't want our own messages. 1057 */ 1058 if ((so->so_options & SO_USELOOPBACK) == 0) { 1059 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 1060 if (rtm) 1061 Free(rtm); 1062 m_freem(m); 1063 goto out; 1064 } 1065 /* There is another listener, so construct message */ 1066 rp = sotorawcb(so); 1067 } 1068 if (rtm) { 1069 m_copyback(m, 0, rtm->rtm_msglen, rtm); 1070 if (m->m_pkthdr.len < rtm->rtm_msglen) { 1071 m_freem(m); 1072 m = NULL; 1073 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 1074 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 1075 Free(rtm); 1076 } 1077 if (rp) 1078 rp->rcb_proto.sp_family = 0; /* Avoid us */ 1079 if (family) 1080 proto.sp_protocol = family; 1081 if (m) 1082 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 1083 &COMPATNAME(route_info).ri_dst, &rt_rawcb); 1084 if (rp) 1085 rp->rcb_proto.sp_family = PF_XROUTE; 1086 } 1087 out: 1088 curlwp_bindx(bound); 1089 return error; 1090 } 1091 1092 static int 1093 route_ctloutput(int op, struct socket *so, struct sockopt *sopt) 1094 { 1095 struct routecb *rop = sotoroutecb(so); 1096 int error = 0; 1097 unsigned char *rtm_type; 1098 size_t len; 1099 unsigned int msgfilter; 1100 1101 KASSERT(solocked(so)); 1102 1103 if (sopt->sopt_level != AF_ROUTE) { 1104 error = ENOPROTOOPT; 1105 } else switch (op) { 1106 case PRCO_SETOPT: 1107 switch (sopt->sopt_name) { 1108 case RO_MSGFILTER: 1109 msgfilter = 0; 1110 for (rtm_type = sopt->sopt_data, len = sopt->sopt_size; 1111 len != 0; 1112 rtm_type++, len -= sizeof(*rtm_type)) 1113 { 1114 /* Guard against overflowing our storage. */ 1115 if (*rtm_type >= sizeof(msgfilter) * CHAR_BIT) { 1116 error = EOVERFLOW; 1117 break; 1118 } 1119 msgfilter |= RTMSGFILTER(*rtm_type); 1120 } 1121 if (error == 0) 1122 rop->rocb_msgfilter = msgfilter; 1123 break; 1124 default: 1125 error = ENOPROTOOPT; 1126 break; 1127 } 1128 break; 1129 case PRCO_GETOPT: 1130 switch (sopt->sopt_name) { 1131 case RO_MSGFILTER: 1132 error = ENOTSUP; 1133 break; 1134 default: 1135 error = ENOPROTOOPT; 1136 break; 1137 } 1138 } 1139 return error; 1140 } 1141 1142 static void 1143 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 1144 { 1145 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 1146 metric(RTV_RPIPE, rmx_recvpipe); 1147 metric(RTV_SPIPE, rmx_sendpipe); 1148 metric(RTV_SSTHRESH, rmx_ssthresh); 1149 metric(RTV_RTT, rmx_rtt); 1150 metric(RTV_RTTVAR, rmx_rttvar); 1151 metric(RTV_HOPCOUNT, rmx_hopcount); 1152 metric(RTV_MTU, rmx_mtu); 1153 #undef metric 1154 if (which & RTV_EXPIRE) { 1155 out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? 1156 time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; 1157 } 1158 } 1159 1160 static void 1161 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 1162 { 1163 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 1164 metric(rmx_recvpipe); 1165 metric(rmx_sendpipe); 1166 metric(rmx_ssthresh); 1167 metric(rmx_rtt); 1168 metric(rmx_rttvar); 1169 metric(rmx_hopcount); 1170 metric(rmx_mtu); 1171 metric(rmx_locks); 1172 #undef metric 1173 out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? 1174 time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; 1175 } 1176 1177 static int 1178 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 1179 struct rt_addrinfo *rtinfo) 1180 { 1181 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 1182 int i; 1183 1184 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 1185 if ((rtinfo->rti_addrs & (1 << i)) == 0) 1186 continue; 1187 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 1188 RT_XADVANCE(cp, sa); 1189 } 1190 1191 /* 1192 * Check for extra addresses specified, except RTM_GET asking 1193 * for interface info. 1194 */ 1195 if (rtmtype == RTM_GET) { 1196 if (((rtinfo->rti_addrs & 1197 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0U << i)) != 0) 1198 return 1; 1199 } else if ((rtinfo->rti_addrs & (~0U << i)) != 0) 1200 return 1; 1201 /* Check for bad data length. */ 1202 if (cp != cplim) { 1203 if (i == RTAX_NETMASK + 1 && sa != NULL && 1204 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 1205 /* 1206 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 1207 * We accept this for now for the sake of old 1208 * binaries or third party softwares. 1209 */ 1210 ; 1211 else 1212 return 1; 1213 } 1214 return 0; 1215 } 1216 1217 static int 1218 rt_getlen(int type) 1219 { 1220 #ifndef COMPAT_RTSOCK 1221 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 1222 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 1223 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 1224 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 1225 #endif 1226 1227 switch (type) { 1228 case RTM_ODELADDR: 1229 case RTM_ONEWADDR: 1230 case RTM_OCHGADDR: 1231 #ifdef COMPAT_70 1232 return sizeof(struct ifa_msghdr70); 1233 #else 1234 #ifdef RTSOCK_DEBUG 1235 printf("%s: unsupported RTM type %d\n", __func__, type); 1236 #endif 1237 return -1; 1238 #endif 1239 case RTM_DELADDR: 1240 case RTM_NEWADDR: 1241 case RTM_CHGADDR: 1242 return sizeof(struct ifa_xmsghdr); 1243 1244 case RTM_OOIFINFO: 1245 #ifdef COMPAT_14 1246 return sizeof(struct if_msghdr14); 1247 #else 1248 #ifdef RTSOCK_DEBUG 1249 printf("%s: unsupported RTM type RTM_OOIFINFO\n", __func__); 1250 #endif 1251 return -1; 1252 #endif 1253 case RTM_OIFINFO: 1254 #ifdef COMPAT_50 1255 return sizeof(struct if_msghdr50); 1256 #else 1257 #ifdef RTSOCK_DEBUG 1258 printf("%s: unsupported RTM type RTM_OIFINFO\n", __func__); 1259 #endif 1260 return -1; 1261 #endif 1262 1263 case RTM_IFINFO: 1264 return sizeof(struct if_xmsghdr); 1265 1266 case RTM_IFANNOUNCE: 1267 case RTM_IEEE80211: 1268 return sizeof(struct if_xannouncemsghdr); 1269 1270 default: 1271 return sizeof(struct rt_xmsghdr); 1272 } 1273 } 1274 1275 1276 struct mbuf * 1277 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 1278 { 1279 struct rt_xmsghdr *rtm; 1280 struct mbuf *m; 1281 int i; 1282 const struct sockaddr *sa; 1283 int len, dlen; 1284 1285 m = m_gethdr(M_DONTWAIT, MT_DATA); 1286 if (m == NULL) 1287 return m; 1288 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 1289 1290 if ((len = rt_getlen(type)) == -1) 1291 goto out; 1292 if (len > MHLEN + MLEN) 1293 panic("%s: message too long", __func__); 1294 else if (len > MHLEN) { 1295 m->m_next = m_get(M_DONTWAIT, MT_DATA); 1296 if (m->m_next == NULL) 1297 goto out; 1298 MCLAIM(m->m_next, m->m_owner); 1299 m->m_pkthdr.len = len; 1300 m->m_len = MHLEN; 1301 m->m_next->m_len = len - MHLEN; 1302 } else { 1303 m->m_pkthdr.len = m->m_len = len; 1304 } 1305 m_reset_rcvif(m); 1306 m_copyback(m, 0, datalen, data); 1307 if (len > datalen) 1308 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 1309 rtm = mtod(m, struct rt_xmsghdr *); 1310 for (i = 0; i < RTAX_MAX; i++) { 1311 if ((sa = rtinfo->rti_info[i]) == NULL) 1312 continue; 1313 rtinfo->rti_addrs |= (1 << i); 1314 dlen = RT_XROUNDUP(sa->sa_len); 1315 m_copyback(m, len, sa->sa_len, sa); 1316 if (dlen != sa->sa_len) { 1317 /* 1318 * Up to 6 + 1 nul's since roundup is to 1319 * sizeof(uint64_t) (8 bytes) 1320 */ 1321 m_copyback(m, len + sa->sa_len, 1322 dlen - sa->sa_len, "\0\0\0\0\0\0"); 1323 } 1324 len += dlen; 1325 } 1326 if (m->m_pkthdr.len != len) 1327 goto out; 1328 rtm->rtm_msglen = len; 1329 rtm->rtm_version = RTM_XVERSION; 1330 rtm->rtm_type = type; 1331 return m; 1332 out: 1333 m_freem(m); 1334 return NULL; 1335 } 1336 1337 /* 1338 * rt_msg2 1339 * 1340 * fills 'cp' or 'w'.w_tmem with the routing socket message and 1341 * returns the length of the message in 'lenp'. 1342 * 1343 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 1344 * the message 1345 * otherwise walkarg's w_needed is updated and if the user buffer is 1346 * specified and w_needed indicates space exists the information is copied 1347 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 1348 * if the allocation fails ENOBUFS is returned. 1349 */ 1350 static int 1351 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1352 int *lenp) 1353 { 1354 int i; 1355 int len, dlen, second_time = 0; 1356 char *cp0, *cp = cpv; 1357 1358 rtinfo->rti_addrs = 0; 1359 again: 1360 if ((len = rt_getlen(type)) == -1) 1361 return EINVAL; 1362 1363 if ((cp0 = cp) != NULL) 1364 cp += len; 1365 for (i = 0; i < RTAX_MAX; i++) { 1366 const struct sockaddr *sa; 1367 1368 if ((sa = rtinfo->rti_info[i]) == NULL) 1369 continue; 1370 rtinfo->rti_addrs |= (1 << i); 1371 dlen = RT_XROUNDUP(sa->sa_len); 1372 if (cp) { 1373 int diff = dlen - sa->sa_len; 1374 (void)memcpy(cp, sa, (size_t)sa->sa_len); 1375 cp += sa->sa_len; 1376 if (diff > 0) { 1377 (void)memset(cp, 0, (size_t)diff); 1378 cp += diff; 1379 } 1380 } 1381 len += dlen; 1382 } 1383 if (cp == NULL && w != NULL && !second_time) { 1384 struct rt_walkarg *rw = w; 1385 1386 rw->w_needed += len; 1387 if (rw->w_needed <= 0 && rw->w_where) { 1388 if (rw->w_tmemsize < len) { 1389 if (rw->w_tmem) 1390 kmem_free(rw->w_tmem, rw->w_tmemsize); 1391 rw->w_tmem = kmem_alloc(len, KM_SLEEP); 1392 rw->w_tmemsize = len; 1393 } 1394 if (rw->w_tmem) { 1395 cp = rw->w_tmem; 1396 second_time = 1; 1397 goto again; 1398 } else { 1399 rw->w_tmemneeded = len; 1400 return ENOBUFS; 1401 } 1402 } 1403 } 1404 if (cp) { 1405 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 1406 1407 rtm->rtm_version = RTM_XVERSION; 1408 rtm->rtm_type = type; 1409 rtm->rtm_msglen = len; 1410 } 1411 if (lenp) 1412 *lenp = len; 1413 return 0; 1414 } 1415 1416 #ifndef COMPAT_RTSOCK 1417 int 1418 rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1419 int *lenp) 1420 { 1421 return rt_msg2(type, rtinfo, cpv, w, lenp); 1422 } 1423 #endif 1424 1425 /* 1426 * This routine is called to generate a message from the routing 1427 * socket indicating that a redirect has occurred, a routing lookup 1428 * has failed, or that a protocol has detected timeouts to a particular 1429 * destination. 1430 */ 1431 void 1432 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 1433 int error) 1434 { 1435 struct rt_xmsghdr rtm; 1436 struct mbuf *m; 1437 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1438 struct rt_addrinfo info = *rtinfo; 1439 1440 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 1441 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1442 return; 1443 memset(&rtm, 0, sizeof(rtm)); 1444 rtm.rtm_pid = curproc->p_pid; 1445 rtm.rtm_flags = RTF_DONE | flags; 1446 rtm.rtm_errno = error; 1447 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 1448 if (m == NULL) 1449 return; 1450 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1451 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1452 } 1453 1454 /* 1455 * This routine is called to generate a message from the routing 1456 * socket indicating that the status of a network interface has changed. 1457 */ 1458 void 1459 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1460 { 1461 struct if_xmsghdr ifm; 1462 struct mbuf *m; 1463 struct rt_addrinfo info; 1464 1465 COMPATCALL(rt_ifmsg, (ifp)); 1466 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1467 return; 1468 (void)memset(&info, 0, sizeof(info)); 1469 (void)memset(&ifm, 0, sizeof(ifm)); 1470 ifm.ifm_index = ifp->if_index; 1471 ifm.ifm_flags = ifp->if_flags; 1472 ifm.ifm_data = ifp->if_data; 1473 ifm.ifm_addrs = 0; 1474 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1475 if (m == NULL) 1476 return; 1477 COMPATNAME(route_enqueue)(m, 0); 1478 #ifdef COMPAT_14 1479 compat_14_rt_oifmsg(ifp); 1480 #endif 1481 #ifdef COMPAT_50 1482 compat_50_rt_oifmsg(ifp); 1483 #endif 1484 } 1485 1486 #ifndef COMPAT_RTSOCK 1487 static int 1488 if_addrflags(struct ifaddr *ifa) 1489 { 1490 1491 switch (ifa->ifa_addr->sa_family) { 1492 #ifdef INET 1493 case AF_INET: 1494 return ((struct in_ifaddr *)ifa)->ia4_flags; 1495 #endif 1496 #ifdef INET6 1497 case AF_INET6: 1498 return ((struct in6_ifaddr *)ifa)->ia6_flags; 1499 #endif 1500 default: 1501 return 0; 1502 } 1503 } 1504 #endif 1505 1506 /* 1507 * This is called to generate messages from the routing socket 1508 * indicating a network interface has had addresses associated with it. 1509 * if we ever reverse the logic and replace messages TO the routing 1510 * socket indicate a request to configure interfaces, then it will 1511 * be unnecessary as the routing socket will automatically generate 1512 * copies of it. 1513 */ 1514 void 1515 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1516 struct rtentry *rt) 1517 { 1518 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1519 struct rt_addrinfo info; 1520 const struct sockaddr *sa; 1521 int pass; 1522 struct mbuf *m; 1523 struct ifnet *ifp; 1524 struct rt_xmsghdr rtm; 1525 struct ifa_xmsghdr ifam; 1526 int ncmd; 1527 1528 KASSERT(ifa != NULL); 1529 KASSERT(ifa->ifa_addr != NULL); 1530 ifp = ifa->ifa_ifp; 1531 #ifdef SCTP 1532 if (cmd == RTM_ADD) { 1533 sctp_add_ip_address(ifa); 1534 } else if (cmd == RTM_DELETE) { 1535 sctp_delete_ip_address(ifa); 1536 } 1537 #endif 1538 1539 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1540 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1541 return; 1542 for (pass = 1; pass < 3; pass++) { 1543 memset(&info, 0, sizeof(info)); 1544 switch (cmdpass(cmd, pass)) { 1545 case cmdpass(RTM_ADD, 1): 1546 case cmdpass(RTM_CHANGE, 1): 1547 case cmdpass(RTM_DELETE, 2): 1548 case cmdpass(RTM_NEWADDR, 1): 1549 case cmdpass(RTM_DELADDR, 1): 1550 case cmdpass(RTM_CHGADDR, 1): 1551 switch (cmd) { 1552 case RTM_ADD: 1553 ncmd = RTM_XNEWADDR; 1554 break; 1555 case RTM_DELETE: 1556 ncmd = RTM_XDELADDR; 1557 break; 1558 case RTM_CHANGE: 1559 ncmd = RTM_XCHGADDR; 1560 break; 1561 case RTM_NEWADDR: 1562 ncmd = RTM_XNEWADDR; 1563 break; 1564 case RTM_DELADDR: 1565 ncmd = RTM_XDELADDR; 1566 break; 1567 case RTM_CHGADDR: 1568 ncmd = RTM_XCHGADDR; 1569 break; 1570 default: 1571 panic("%s: unknown command %d", __func__, cmd); 1572 } 1573 #ifdef COMPAT_70 1574 compat_70_rt_newaddrmsg1(ncmd, ifa); 1575 #endif 1576 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1577 KASSERT(ifp->if_dl != NULL); 1578 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1579 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1580 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1581 memset(&ifam, 0, sizeof(ifam)); 1582 ifam.ifam_index = ifp->if_index; 1583 ifam.ifam_metric = ifa->ifa_metric; 1584 ifam.ifam_flags = ifa->ifa_flags; 1585 #ifndef COMPAT_RTSOCK 1586 ifam.ifam_pid = curproc->p_pid; 1587 ifam.ifam_addrflags = if_addrflags(ifa); 1588 #endif 1589 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1590 if (m == NULL) 1591 continue; 1592 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1593 info.rti_addrs; 1594 break; 1595 case cmdpass(RTM_ADD, 2): 1596 case cmdpass(RTM_CHANGE, 2): 1597 case cmdpass(RTM_DELETE, 1): 1598 if (rt == NULL) 1599 continue; 1600 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1601 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1602 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1603 memset(&rtm, 0, sizeof(rtm)); 1604 rtm.rtm_pid = curproc->p_pid; 1605 rtm.rtm_index = ifp->if_index; 1606 rtm.rtm_flags |= rt->rt_flags; 1607 rtm.rtm_errno = error; 1608 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1609 if (m == NULL) 1610 continue; 1611 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1612 break; 1613 default: 1614 continue; 1615 } 1616 KASSERTMSG(m != NULL, "called with wrong command"); 1617 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1618 } 1619 #undef cmdpass 1620 1621 } 1622 1623 static struct mbuf * 1624 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1625 struct rt_addrinfo *info) 1626 { 1627 struct if_xannouncemsghdr ifan; 1628 1629 memset(info, 0, sizeof(*info)); 1630 memset(&ifan, 0, sizeof(ifan)); 1631 ifan.ifan_index = ifp->if_index; 1632 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1633 ifan.ifan_what = what; 1634 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1635 } 1636 1637 /* 1638 * This is called to generate routing socket messages indicating 1639 * network interface arrival and departure. 1640 */ 1641 void 1642 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1643 { 1644 struct mbuf *m; 1645 struct rt_addrinfo info; 1646 1647 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1648 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1649 return; 1650 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1651 if (m == NULL) 1652 return; 1653 COMPATNAME(route_enqueue)(m, 0); 1654 } 1655 1656 /* 1657 * This is called to generate routing socket messages indicating 1658 * IEEE80211 wireless events. 1659 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1660 */ 1661 void 1662 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1663 size_t data_len) 1664 { 1665 struct mbuf *m; 1666 struct rt_addrinfo info; 1667 1668 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1669 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1670 return; 1671 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1672 if (m == NULL) 1673 return; 1674 /* 1675 * Append the ieee80211 data. Try to stick it in the 1676 * mbuf containing the ifannounce msg; otherwise allocate 1677 * a new mbuf and append. 1678 * 1679 * NB: we assume m is a single mbuf. 1680 */ 1681 if (data_len > M_TRAILINGSPACE(m)) { 1682 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1683 if (n == NULL) { 1684 m_freem(m); 1685 return; 1686 } 1687 (void)memcpy(mtod(n, void *), data, data_len); 1688 n->m_len = data_len; 1689 m->m_next = n; 1690 } else if (data_len > 0) { 1691 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1692 m->m_len += data_len; 1693 } 1694 if (m->m_flags & M_PKTHDR) 1695 m->m_pkthdr.len += data_len; 1696 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1697 COMPATNAME(route_enqueue)(m, 0); 1698 } 1699 1700 #ifndef COMPAT_RTSOCK 1701 /* 1702 * Send a routing message as mimicing that a cloned route is added. 1703 */ 1704 void 1705 rt_clonedmsg(const struct sockaddr *dst, const struct ifnet *ifp, 1706 const struct rtentry *rt) 1707 { 1708 struct rt_addrinfo info; 1709 /* Mimic flags exactly */ 1710 #define RTF_LLINFO 0x400 1711 #define RTF_CLONED 0x2000 1712 int flags = RTF_UP | RTF_HOST | RTF_DONE | RTF_LLINFO | RTF_CLONED; 1713 union { 1714 struct sockaddr sa; 1715 struct sockaddr_storage ss; 1716 struct sockaddr_dl sdl; 1717 } u; 1718 uint8_t namelen = strlen(ifp->if_xname); 1719 uint8_t addrlen = ifp->if_addrlen; 1720 1721 if (rt == NULL) 1722 return; /* XXX */ 1723 1724 memset(&info, 0, sizeof(info)); 1725 info.rti_info[RTAX_DST] = dst; 1726 sockaddr_dl_init(&u.sdl, sizeof(u.ss), ifp->if_index, ifp->if_type, 1727 NULL, namelen, NULL, addrlen); 1728 info.rti_info[RTAX_GATEWAY] = &u.sa; 1729 1730 rt_missmsg(RTM_ADD, &info, flags, 0); 1731 #undef RTF_LLINFO 1732 #undef RTF_CLONED 1733 } 1734 #endif /* COMPAT_RTSOCK */ 1735 1736 /* 1737 * This is used in dumping the kernel table via sysctl(). 1738 */ 1739 static int 1740 sysctl_dumpentry(struct rtentry *rt, void *v) 1741 { 1742 struct rt_walkarg *w = v; 1743 int error = 0, size; 1744 struct rt_addrinfo info; 1745 1746 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1747 return 0; 1748 memset(&info, 0, sizeof(info)); 1749 info.rti_info[RTAX_DST] = rt_getkey(rt); 1750 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1751 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1752 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1753 if (rt->rt_ifp) { 1754 const struct ifaddr *rtifa; 1755 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1756 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1757 * then rt_get_ifa() != NULL. So this ought to still be safe. 1758 * --dyoung 1759 */ 1760 rtifa = rt_get_ifa(rt); 1761 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1762 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1763 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1764 } 1765 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1766 return error; 1767 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1768 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1769 1770 rtm->rtm_flags = rt->rt_flags; 1771 rtm->rtm_use = rt->rt_use; 1772 rtm_setmetrics(rt, rtm); 1773 KASSERT(rt->rt_ifp != NULL); 1774 rtm->rtm_index = rt->rt_ifp->if_index; 1775 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1776 rtm->rtm_addrs = info.rti_addrs; 1777 if ((error = copyout(rtm, w->w_where, size)) != 0) 1778 w->w_where = NULL; 1779 else 1780 w->w_where = (char *)w->w_where + size; 1781 } 1782 return error; 1783 } 1784 1785 static int 1786 sysctl_iflist_if(struct ifnet *ifp, struct rt_walkarg *w, 1787 struct rt_addrinfo *info, size_t len) 1788 { 1789 struct if_xmsghdr *ifm; 1790 int error; 1791 1792 ifm = (struct if_xmsghdr *)w->w_tmem; 1793 ifm->ifm_index = ifp->if_index; 1794 ifm->ifm_flags = ifp->if_flags; 1795 ifm->ifm_data = ifp->if_data; 1796 ifm->ifm_addrs = info->rti_addrs; 1797 if ((error = copyout(ifm, w->w_where, len)) == 0) 1798 w->w_where = (char *)w->w_where + len; 1799 return error; 1800 } 1801 1802 static int 1803 sysctl_iflist_addr(struct rt_walkarg *w, struct ifaddr *ifa, 1804 struct rt_addrinfo *info) 1805 { 1806 int len, error; 1807 1808 if ((error = rt_msg2(RTM_XNEWADDR, info, 0, w, &len))) 1809 return error; 1810 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1811 struct ifa_xmsghdr *ifam; 1812 1813 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1814 ifam->ifam_index = ifa->ifa_ifp->if_index; 1815 ifam->ifam_flags = ifa->ifa_flags; 1816 ifam->ifam_metric = ifa->ifa_metric; 1817 ifam->ifam_addrs = info->rti_addrs; 1818 #ifndef COMPAT_RTSOCK 1819 ifam->ifam_pid = 0; 1820 ifam->ifam_addrflags = if_addrflags(ifa); 1821 #endif 1822 if ((error = copyout(w->w_tmem, w->w_where, len)) == 0) 1823 w->w_where = (char *)w->w_where + len; 1824 } 1825 return error; 1826 } 1827 1828 static int 1829 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1830 { 1831 struct ifnet *ifp; 1832 struct ifaddr *ifa; 1833 struct rt_addrinfo info; 1834 int cmd, len, error = 0; 1835 int (*iflist_if)(struct ifnet *, struct rt_walkarg *, 1836 struct rt_addrinfo *, size_t); 1837 int (*iflist_addr)(struct rt_walkarg *, struct ifaddr *, 1838 struct rt_addrinfo *); 1839 int s; 1840 struct psref psref; 1841 int bound; 1842 1843 switch (type) { 1844 case NET_RT_IFLIST: 1845 cmd = RTM_IFINFO; 1846 iflist_if = sysctl_iflist_if; 1847 iflist_addr = sysctl_iflist_addr; 1848 break; 1849 #ifdef COMPAT_14 1850 case NET_RT_OOOIFLIST: 1851 cmd = RTM_OOIFINFO; 1852 iflist_if = compat_14_iflist; 1853 iflist_addr = compat_70_iflist_addr; 1854 break; 1855 #endif 1856 #ifdef COMPAT_50 1857 case NET_RT_OOIFLIST: 1858 cmd = RTM_OIFINFO; 1859 iflist_if = compat_50_iflist; 1860 iflist_addr = compat_70_iflist_addr; 1861 break; 1862 #endif 1863 #ifdef COMPAT_70 1864 case NET_RT_OIFLIST: 1865 cmd = RTM_IFINFO; 1866 iflist_if = sysctl_iflist_if; 1867 iflist_addr = compat_70_iflist_addr; 1868 break; 1869 #endif 1870 default: 1871 #ifdef RTSOCK_DEBUG 1872 printf("%s: unsupported IFLIST type %d\n", __func__, type); 1873 #endif 1874 return EINVAL; 1875 } 1876 1877 memset(&info, 0, sizeof(info)); 1878 1879 bound = curlwp_bind(); 1880 s = pserialize_read_enter(); 1881 IFNET_READER_FOREACH(ifp) { 1882 int _s; 1883 if (w->w_arg && w->w_arg != ifp->if_index) 1884 continue; 1885 if (IFADDR_READER_EMPTY(ifp)) 1886 continue; 1887 1888 if_acquire(ifp, &psref); 1889 pserialize_read_exit(s); 1890 1891 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1892 if ((error = rt_msg2(cmd, &info, NULL, w, &len)) != 0) 1893 goto release_exit; 1894 info.rti_info[RTAX_IFP] = NULL; 1895 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1896 if ((error = iflist_if(ifp, w, &info, len)) != 0) 1897 goto release_exit; 1898 } 1899 _s = pserialize_read_enter(); 1900 IFADDR_READER_FOREACH(ifa, ifp) { 1901 struct psref _psref; 1902 if (af && af != ifa->ifa_addr->sa_family) 1903 continue; 1904 ifa_acquire(ifa, &_psref); 1905 pserialize_read_exit(_s); 1906 1907 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1908 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1909 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1910 error = iflist_addr(w, ifa, &info); 1911 1912 _s = pserialize_read_enter(); 1913 ifa_release(ifa, &_psref); 1914 if (error != 0) { 1915 pserialize_read_exit(_s); 1916 goto release_exit; 1917 } 1918 } 1919 pserialize_read_exit(_s); 1920 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1921 info.rti_info[RTAX_BRD] = NULL; 1922 1923 s = pserialize_read_enter(); 1924 if_release(ifp, &psref); 1925 } 1926 pserialize_read_exit(s); 1927 curlwp_bindx(bound); 1928 1929 return 0; 1930 1931 release_exit: 1932 if_release(ifp, &psref); 1933 curlwp_bindx(bound); 1934 return error; 1935 } 1936 1937 static int 1938 sysctl_rtable(SYSCTLFN_ARGS) 1939 { 1940 void *where = oldp; 1941 size_t *given = oldlenp; 1942 int i, s, error = EINVAL; 1943 u_char af; 1944 struct rt_walkarg w; 1945 1946 if (namelen == 1 && name[0] == CTL_QUERY) 1947 return sysctl_query(SYSCTLFN_CALL(rnode)); 1948 1949 if (newp) 1950 return EPERM; 1951 if (namelen != 3) 1952 return EINVAL; 1953 af = name[0]; 1954 w.w_tmemneeded = 0; 1955 w.w_tmemsize = 0; 1956 w.w_tmem = NULL; 1957 again: 1958 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1959 if (w.w_tmemneeded) { 1960 w.w_tmem = kmem_alloc(w.w_tmemneeded, KM_SLEEP); 1961 w.w_tmemsize = w.w_tmemneeded; 1962 w.w_tmemneeded = 0; 1963 } 1964 w.w_op = name[1]; 1965 w.w_arg = name[2]; 1966 w.w_given = *given; 1967 w.w_needed = 0 - w.w_given; 1968 w.w_where = where; 1969 1970 s = splsoftnet(); 1971 switch (w.w_op) { 1972 1973 case NET_RT_DUMP: 1974 case NET_RT_FLAGS: 1975 #if defined(INET) || defined(INET6) 1976 /* 1977 * take care of llinfo entries, the caller must 1978 * specify an AF 1979 */ 1980 if (w.w_op == NET_RT_FLAGS && 1981 (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { 1982 if (af != 0) 1983 error = lltable_sysctl_dump(af, &w); 1984 else 1985 error = EINVAL; 1986 break; 1987 } 1988 #endif 1989 1990 for (i = 1; i <= AF_MAX; i++) { 1991 if (af == 0 || af == i) { 1992 error = rt_walktree(i, sysctl_dumpentry, &w); 1993 if (error != 0) 1994 break; 1995 #if defined(INET) || defined(INET6) 1996 /* 1997 * Return ARP/NDP entries too for 1998 * backward compatibility. 1999 */ 2000 error = lltable_sysctl_dump(i, &w); 2001 if (error != 0) 2002 break; 2003 #endif 2004 } 2005 } 2006 break; 2007 2008 #ifdef COMPAT_14 2009 case NET_RT_OOOIFLIST: 2010 error = sysctl_iflist(af, &w, w.w_op); 2011 break; 2012 #endif 2013 #ifdef COMPAT_50 2014 case NET_RT_OOIFLIST: 2015 error = sysctl_iflist(af, &w, w.w_op); 2016 break; 2017 #endif 2018 #ifdef COMPAT_70 2019 case NET_RT_OIFLIST: 2020 error = sysctl_iflist(af, &w, w.w_op); 2021 break; 2022 #endif 2023 case NET_RT_IFLIST: 2024 error = sysctl_iflist(af, &w, w.w_op); 2025 break; 2026 } 2027 splx(s); 2028 2029 /* check to see if we couldn't allocate memory with NOWAIT */ 2030 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 2031 goto again; 2032 2033 if (w.w_tmem) 2034 kmem_free(w.w_tmem, w.w_tmemsize); 2035 w.w_needed += w.w_given; 2036 if (where) { 2037 *given = (char *)w.w_where - (char *)where; 2038 if (*given < w.w_needed) 2039 return ENOMEM; 2040 } else { 2041 *given = (11 * w.w_needed) / 10; 2042 } 2043 return error; 2044 } 2045 2046 /* 2047 * Routing message software interrupt routine 2048 */ 2049 static void 2050 COMPATNAME(route_intr)(void *cookie) 2051 { 2052 struct sockproto proto = { .sp_family = PF_XROUTE, }; 2053 struct route_info * const ri = &COMPATNAME(route_info); 2054 struct mbuf *m; 2055 2056 SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE(); 2057 for (;;) { 2058 IFQ_LOCK(&ri->ri_intrq); 2059 IF_DEQUEUE(&ri->ri_intrq, m); 2060 IFQ_UNLOCK(&ri->ri_intrq); 2061 if (m == NULL) 2062 break; 2063 proto.sp_protocol = M_GETCTX(m, uintptr_t); 2064 #ifdef NET_MPSAFE 2065 mutex_enter(rt_so_mtx); 2066 #endif 2067 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst, &rt_rawcb); 2068 #ifdef NET_MPSAFE 2069 mutex_exit(rt_so_mtx); 2070 #endif 2071 } 2072 SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); 2073 } 2074 2075 /* 2076 * Enqueue a message to the software interrupt routine. 2077 */ 2078 void 2079 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 2080 { 2081 struct route_info * const ri = &COMPATNAME(route_info); 2082 int wasempty; 2083 2084 IFQ_LOCK(&ri->ri_intrq); 2085 if (IF_QFULL(&ri->ri_intrq)) { 2086 IF_DROP(&ri->ri_intrq); 2087 IFQ_UNLOCK(&ri->ri_intrq); 2088 m_freem(m); 2089 } else { 2090 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 2091 M_SETCTX(m, (uintptr_t)family); 2092 IF_ENQUEUE(&ri->ri_intrq, m); 2093 IFQ_UNLOCK(&ri->ri_intrq); 2094 if (wasempty) { 2095 kpreempt_disable(); 2096 softint_schedule(ri->ri_sih); 2097 kpreempt_enable(); 2098 } 2099 } 2100 } 2101 2102 static void 2103 COMPATNAME(route_init)(void) 2104 { 2105 struct route_info * const ri = &COMPATNAME(route_info); 2106 2107 #ifndef COMPAT_RTSOCK 2108 rt_init(); 2109 #endif 2110 #ifdef NET_MPSAFE 2111 rt_so_mtx = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE); 2112 #endif 2113 2114 sysctl_net_route_setup(NULL); 2115 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 2116 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 2117 COMPATNAME(route_intr), NULL); 2118 IFQ_LOCK_INIT(&ri->ri_intrq); 2119 } 2120 2121 /* 2122 * Definitions of protocols supported in the ROUTE domain. 2123 */ 2124 #ifndef COMPAT_RTSOCK 2125 PR_WRAP_USRREQS(route); 2126 #else 2127 PR_WRAP_USRREQS(compat_50_route); 2128 #endif 2129 2130 static const struct pr_usrreqs route_usrreqs = { 2131 .pr_attach = COMPATNAME(route_attach_wrapper), 2132 .pr_detach = COMPATNAME(route_detach_wrapper), 2133 .pr_accept = COMPATNAME(route_accept_wrapper), 2134 .pr_bind = COMPATNAME(route_bind_wrapper), 2135 .pr_listen = COMPATNAME(route_listen_wrapper), 2136 .pr_connect = COMPATNAME(route_connect_wrapper), 2137 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 2138 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 2139 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 2140 .pr_abort = COMPATNAME(route_abort_wrapper), 2141 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 2142 .pr_stat = COMPATNAME(route_stat_wrapper), 2143 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 2144 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 2145 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 2146 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 2147 .pr_send = COMPATNAME(route_send_wrapper), 2148 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 2149 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 2150 }; 2151 2152 static const struct protosw COMPATNAME(route_protosw)[] = { 2153 { 2154 .pr_type = SOCK_RAW, 2155 .pr_domain = &COMPATNAME(routedomain), 2156 .pr_flags = PR_ATOMIC|PR_ADDR, 2157 .pr_input = raw_input, 2158 .pr_ctlinput = raw_ctlinput, 2159 .pr_ctloutput = route_ctloutput, 2160 .pr_usrreqs = &route_usrreqs, 2161 .pr_init = rt_pr_init, 2162 }, 2163 }; 2164 2165 struct domain COMPATNAME(routedomain) = { 2166 .dom_family = PF_XROUTE, 2167 .dom_name = DOMAINNAME, 2168 .dom_init = COMPATNAME(route_init), 2169 .dom_protosw = COMPATNAME(route_protosw), 2170 .dom_protoswNPROTOSW = 2171 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 2172 }; 2173 2174 static void 2175 sysctl_net_route_setup(struct sysctllog **clog) 2176 { 2177 const struct sysctlnode *rnode = NULL; 2178 2179 sysctl_createv(clog, 0, NULL, &rnode, 2180 CTLFLAG_PERMANENT, 2181 CTLTYPE_NODE, DOMAINNAME, 2182 SYSCTL_DESCR("PF_ROUTE information"), 2183 NULL, 0, NULL, 0, 2184 CTL_NET, PF_XROUTE, CTL_EOL); 2185 2186 sysctl_createv(clog, 0, NULL, NULL, 2187 CTLFLAG_PERMANENT, 2188 CTLTYPE_NODE, "rtable", 2189 SYSCTL_DESCR("Routing table information"), 2190 sysctl_rtable, 0, NULL, 0, 2191 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 2192 2193 sysctl_createv(clog, 0, &rnode, NULL, 2194 CTLFLAG_PERMANENT, 2195 CTLTYPE_STRUCT, "stats", 2196 SYSCTL_DESCR("Routing statistics"), 2197 NULL, 0, &rtstat, sizeof(rtstat), 2198 CTL_CREATE, CTL_EOL); 2199 } 2200
Indexes created Fri Oct 03 02:09:57 GMT 2025