rtsock.c revision 1.228
1 /* $NetBSD: rtsock.c,v 1.228 2017/09/25 01:56:22 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 1.228 2017/09/25 01:56:22 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 void 188 rt_adjustcount(int af, int cnt) 189 { 190 struct route_cb * const cb = &COMPATNAME(route_info).ri_cb; 191 192 cb->any_count += cnt; 193 194 switch (af) { 195 case AF_INET: 196 cb->ip_count += cnt; 197 return; 198 #ifdef INET6 199 case AF_INET6: 200 cb->ip6_count += cnt; 201 return; 202 #endif 203 case AF_MPLS: 204 cb->mpls_count += cnt; 205 return; 206 } 207 } 208 209 static int 210 COMPATNAME(route_filter)(struct mbuf *m, struct sockproto *proto, 211 struct rawcb *rp) 212 { 213 struct routecb *rop = (struct routecb *)rp; 214 struct rt_xmsghdr *rtm; 215 216 KASSERT(m != NULL); 217 KASSERT(proto != NULL); 218 KASSERT(rp != NULL); 219 220 /* Wrong family for this socket. */ 221 if (proto->sp_family != PF_ROUTE) 222 return ENOPROTOOPT; 223 224 /* If no filter set, just return. */ 225 if (rop->rocb_msgfilter == 0) 226 return 0; 227 228 /* Ensure we can access rtm_type */ 229 if (m->m_len < 230 offsetof(struct rt_xmsghdr, rtm_type) + sizeof(rtm->rtm_type)) 231 return EINVAL; 232 233 rtm = mtod(m, struct rt_xmsghdr *); 234 /* If the rtm type is filtered out, return a positive. */ 235 if (!(rop->rocb_msgfilter & RTMSGFILTER(rtm->rtm_type))) 236 return EEXIST; 237 238 /* Passed the filter. */ 239 return 0; 240 } 241 242 static void 243 rt_pr_init(void) 244 { 245 246 LIST_INIT(&rt_rawcb); 247 } 248 249 static int 250 COMPATNAME(route_attach)(struct socket *so, int proto) 251 { 252 struct rawcb *rp; 253 struct routecb *rop; 254 int s, error; 255 256 KASSERT(sotorawcb(so) == NULL); 257 rop = kmem_zalloc(sizeof(*rop), KM_SLEEP); 258 rp = &rop->rocb_rcb; 259 rp->rcb_len = sizeof(*rop); 260 so->so_pcb = rp; 261 262 s = splsoftnet(); 263 if ((error = raw_attach(so, proto, &rt_rawcb)) == 0) { 264 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 265 rp->rcb_laddr = &COMPATNAME(route_info).ri_src; 266 rp->rcb_faddr = &COMPATNAME(route_info).ri_dst; 267 rp->rcb_filter = COMPATNAME(route_filter); 268 } 269 splx(s); 270 271 if (error) { 272 kmem_free(rop, sizeof(*rop)); 273 so->so_pcb = NULL; 274 return error; 275 } 276 277 soisconnected(so); 278 so->so_options |= SO_USELOOPBACK; 279 KASSERT(solocked(so)); 280 281 return error; 282 } 283 284 static void 285 COMPATNAME(route_detach)(struct socket *so) 286 { 287 struct rawcb *rp = sotorawcb(so); 288 int s; 289 290 KASSERT(rp != NULL); 291 KASSERT(solocked(so)); 292 293 s = splsoftnet(); 294 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 295 raw_detach(so); 296 splx(s); 297 } 298 299 static int 300 COMPATNAME(route_accept)(struct socket *so, struct sockaddr *nam) 301 { 302 KASSERT(solocked(so)); 303 304 panic("route_accept"); 305 306 return EOPNOTSUPP; 307 } 308 309 static int 310 COMPATNAME(route_bind)(struct socket *so, struct sockaddr *nam, struct lwp *l) 311 { 312 KASSERT(solocked(so)); 313 314 return EOPNOTSUPP; 315 } 316 317 static int 318 COMPATNAME(route_listen)(struct socket *so, struct lwp *l) 319 { 320 KASSERT(solocked(so)); 321 322 return EOPNOTSUPP; 323 } 324 325 static int 326 COMPATNAME(route_connect)(struct socket *so, struct sockaddr *nam, struct lwp *l) 327 { 328 KASSERT(solocked(so)); 329 330 return EOPNOTSUPP; 331 } 332 333 static int 334 COMPATNAME(route_connect2)(struct socket *so, struct socket *so2) 335 { 336 KASSERT(solocked(so)); 337 338 return EOPNOTSUPP; 339 } 340 341 static int 342 COMPATNAME(route_disconnect)(struct socket *so) 343 { 344 struct rawcb *rp = sotorawcb(so); 345 int s; 346 347 KASSERT(solocked(so)); 348 KASSERT(rp != NULL); 349 350 s = splsoftnet(); 351 soisdisconnected(so); 352 raw_disconnect(rp); 353 splx(s); 354 355 return 0; 356 } 357 358 static int 359 COMPATNAME(route_shutdown)(struct socket *so) 360 { 361 int s; 362 363 KASSERT(solocked(so)); 364 365 /* 366 * Mark the connection as being incapable of further input. 367 */ 368 s = splsoftnet(); 369 socantsendmore(so); 370 splx(s); 371 return 0; 372 } 373 374 static int 375 COMPATNAME(route_abort)(struct socket *so) 376 { 377 KASSERT(solocked(so)); 378 379 panic("route_abort"); 380 381 return EOPNOTSUPP; 382 } 383 384 static int 385 COMPATNAME(route_ioctl)(struct socket *so, u_long cmd, void *nam, 386 struct ifnet * ifp) 387 { 388 return EOPNOTSUPP; 389 } 390 391 static int 392 COMPATNAME(route_stat)(struct socket *so, struct stat *ub) 393 { 394 KASSERT(solocked(so)); 395 396 return 0; 397 } 398 399 static int 400 COMPATNAME(route_peeraddr)(struct socket *so, struct sockaddr *nam) 401 { 402 struct rawcb *rp = sotorawcb(so); 403 404 KASSERT(solocked(so)); 405 KASSERT(rp != NULL); 406 KASSERT(nam != NULL); 407 408 if (rp->rcb_faddr == NULL) 409 return ENOTCONN; 410 411 raw_setpeeraddr(rp, nam); 412 return 0; 413 } 414 415 static int 416 COMPATNAME(route_sockaddr)(struct socket *so, struct sockaddr *nam) 417 { 418 struct rawcb *rp = sotorawcb(so); 419 420 KASSERT(solocked(so)); 421 KASSERT(rp != NULL); 422 KASSERT(nam != NULL); 423 424 if (rp->rcb_faddr == NULL) 425 return ENOTCONN; 426 427 raw_setsockaddr(rp, nam); 428 return 0; 429 } 430 431 static int 432 COMPATNAME(route_rcvd)(struct socket *so, int flags, struct lwp *l) 433 { 434 KASSERT(solocked(so)); 435 436 return EOPNOTSUPP; 437 } 438 439 static int 440 COMPATNAME(route_recvoob)(struct socket *so, struct mbuf *m, int flags) 441 { 442 KASSERT(solocked(so)); 443 444 return EOPNOTSUPP; 445 } 446 447 static int 448 COMPATNAME(route_send)(struct socket *so, struct mbuf *m, 449 struct sockaddr *nam, struct mbuf *control, struct lwp *l) 450 { 451 int error = 0; 452 int s; 453 454 KASSERT(solocked(so)); 455 KASSERT(so->so_proto == &COMPATNAME(route_protosw)[0]); 456 457 s = splsoftnet(); 458 error = raw_send(so, m, nam, control, l, &COMPATNAME(route_output)); 459 splx(s); 460 461 return error; 462 } 463 464 static int 465 COMPATNAME(route_sendoob)(struct socket *so, struct mbuf *m, 466 struct mbuf *control) 467 { 468 KASSERT(solocked(so)); 469 470 m_freem(m); 471 m_freem(control); 472 473 return EOPNOTSUPP; 474 } 475 static int 476 COMPATNAME(route_purgeif)(struct socket *so, struct ifnet *ifp) 477 { 478 479 panic("route_purgeif"); 480 481 return EOPNOTSUPP; 482 } 483 484 #if defined(INET) || defined(INET6) 485 static int 486 route_get_sdl_index(struct rt_addrinfo *info, int *sdl_index) 487 { 488 struct rtentry *nrt; 489 int error; 490 491 error = rtrequest1(RTM_GET, info, &nrt); 492 if (error != 0) 493 return error; 494 /* 495 * nrt->rt_ifp->if_index may not be correct 496 * due to changing to ifplo0. 497 */ 498 *sdl_index = satosdl(nrt->rt_gateway)->sdl_index; 499 rt_unref(nrt); 500 501 return 0; 502 } 503 #endif 504 505 static void 506 route_get_sdl(const struct ifnet *ifp, const struct sockaddr *dst, 507 struct sockaddr_dl *sdl, int *flags) 508 { 509 struct llentry *la; 510 511 KASSERT(ifp != NULL); 512 513 IF_AFDATA_RLOCK(ifp); 514 switch (dst->sa_family) { 515 case AF_INET: 516 la = lla_lookup(LLTABLE(ifp), 0, dst); 517 break; 518 case AF_INET6: 519 la = lla_lookup(LLTABLE6(ifp), 0, dst); 520 break; 521 default: 522 la = NULL; 523 KASSERTMSG(0, "Invalid AF=%d\n", dst->sa_family); 524 break; 525 } 526 IF_AFDATA_RUNLOCK(ifp); 527 528 void *a = (LLE_IS_VALID(la) && (la->la_flags & LLE_VALID) == LLE_VALID) 529 ? &la->ll_addr : NULL; 530 531 a = sockaddr_dl_init(sdl, sizeof(*sdl), ifp->if_index, ifp->if_type, 532 NULL, 0, a, ifp->if_addrlen); 533 KASSERT(a != NULL); 534 535 if (la != NULL) { 536 *flags = la->la_flags; 537 LLE_RUNLOCK(la); 538 } 539 } 540 541 static int 542 route_output_report(struct rtentry *rt, struct rt_addrinfo *info, 543 struct rt_xmsghdr *rtm, struct rt_xmsghdr **new_rtm) 544 { 545 int len; 546 547 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 548 const struct ifaddr *rtifa; 549 const struct ifnet *ifp = rt->rt_ifp; 550 551 info->rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 552 /* rtifa used to be simply rt->rt_ifa. 553 * If rt->rt_ifa != NULL, then 554 * rt_get_ifa() != NULL. So this 555 * ought to still be safe. --dyoung 556 */ 557 rtifa = rt_get_ifa(rt); 558 info->rti_info[RTAX_IFA] = rtifa->ifa_addr; 559 #ifdef RTSOCK_DEBUG 560 if (info->rti_info[RTAX_IFA]->sa_family == AF_INET) { 561 char ibuf[INET_ADDRSTRLEN]; 562 char abuf[INET_ADDRSTRLEN]; 563 printf("%s: copying out RTAX_IFA %s " 564 "for info->rti_info[RTAX_DST] %s " 565 "ifa_getifa %p ifa_seqno %p\n", 566 __func__, 567 RT_IN_PRINT(info, ibuf, RTAX_IFA), 568 RT_IN_PRINT(info, abuf, RTAX_DST), 569 (void *)rtifa->ifa_getifa, 570 rtifa->ifa_seqno); 571 } 572 #endif /* RTSOCK_DEBUG */ 573 if (ifp->if_flags & IFF_POINTOPOINT) 574 info->rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 575 else 576 info->rti_info[RTAX_BRD] = NULL; 577 rtm->rtm_index = ifp->if_index; 578 } 579 (void)rt_msg2(rtm->rtm_type, info, NULL, NULL, &len); 580 if (len > rtm->rtm_msglen) { 581 struct rt_xmsghdr *old_rtm = rtm; 582 R_Malloc(*new_rtm, struct rt_xmsghdr *, len); 583 if (*new_rtm == NULL) 584 return ENOBUFS; 585 (void)memcpy(*new_rtm, old_rtm, old_rtm->rtm_msglen); 586 rtm = *new_rtm; 587 } 588 (void)rt_msg2(rtm->rtm_type, info, rtm, NULL, 0); 589 rtm->rtm_flags = rt->rt_flags; 590 rtm_setmetrics(rt, rtm); 591 rtm->rtm_addrs = info->rti_addrs; 592 593 return 0; 594 } 595 596 static struct ifaddr * 597 route_output_get_ifa(const struct rt_addrinfo info, const struct rtentry *rt, 598 struct ifnet **ifp, struct psref *psref) 599 { 600 struct ifaddr *ifa = NULL; 601 602 *ifp = NULL; 603 if (info.rti_info[RTAX_IFP] != NULL) { 604 ifa = ifa_ifwithnet_psref(info.rti_info[RTAX_IFP], psref); 605 if (ifa == NULL) 606 goto next; 607 *ifp = ifa->ifa_ifp; 608 if (info.rti_info[RTAX_IFA] == NULL && 609 info.rti_info[RTAX_GATEWAY] == NULL) 610 goto next; 611 if (info.rti_info[RTAX_IFA] == NULL) { 612 /* route change <dst> <gw> -ifp <if> */ 613 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_GATEWAY], 614 *ifp, psref); 615 } else { 616 /* route change <dst> -ifp <if> -ifa <addr> */ 617 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 618 if (ifa != NULL) 619 goto out; 620 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_IFA], 621 *ifp, psref); 622 } 623 goto out; 624 } 625 next: 626 if (info.rti_info[RTAX_IFA] != NULL) { 627 /* route change <dst> <gw> -ifa <addr> */ 628 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 629 if (ifa != NULL) 630 goto out; 631 } 632 if (info.rti_info[RTAX_GATEWAY] != NULL) { 633 /* route change <dst> <gw> */ 634 ifa = ifa_ifwithroute_psref(rt->rt_flags, rt_getkey(rt), 635 info.rti_info[RTAX_GATEWAY], psref); 636 } 637 out: 638 if (ifa != NULL && *ifp == NULL) 639 *ifp = ifa->ifa_ifp; 640 return ifa; 641 } 642 643 static int 644 route_output_change(struct rtentry *rt, struct rt_addrinfo *info, 645 struct rt_xmsghdr *rtm) 646 { 647 int error = 0; 648 struct ifnet *ifp = NULL, *new_ifp; 649 struct ifaddr *ifa = NULL, *new_ifa; 650 struct psref psref_ifa, psref_new_ifa, psref_ifp; 651 bool newgw, ifp_changed = false; 652 653 /* 654 * New gateway could require new ifaddr, ifp; 655 * flags may also be different; ifp may be specified 656 * by ll sockaddr when protocol address is ambiguous 657 */ 658 newgw = info->rti_info[RTAX_GATEWAY] != NULL && 659 sockaddr_cmp(info->rti_info[RTAX_GATEWAY], rt->rt_gateway) != 0; 660 661 if (newgw || info->rti_info[RTAX_IFP] != NULL || 662 info->rti_info[RTAX_IFA] != NULL) { 663 ifp = rt_getifp(info, &psref_ifp); 664 ifa = rt_getifa(info, &psref_ifa); 665 if (ifa == NULL) { 666 error = ENETUNREACH; 667 goto out; 668 } 669 } 670 if (newgw) { 671 error = rt_setgate(rt, info->rti_info[RTAX_GATEWAY]); 672 if (error != 0) 673 goto out; 674 } 675 if (info->rti_info[RTAX_TAG]) { 676 const struct sockaddr *tag; 677 tag = rt_settag(rt, info->rti_info[RTAX_TAG]); 678 if (tag == NULL) { 679 error = ENOBUFS; 680 goto out; 681 } 682 } 683 /* 684 * New gateway could require new ifaddr, ifp; 685 * flags may also be different; ifp may be specified 686 * by ll sockaddr when protocol address is ambiguous 687 */ 688 new_ifa = route_output_get_ifa(*info, rt, &new_ifp, &psref_new_ifa); 689 if (new_ifa != NULL) { 690 ifa_release(ifa, &psref_ifa); 691 ifa = new_ifa; 692 } 693 if (ifa) { 694 struct ifaddr *oifa = rt->rt_ifa; 695 if (oifa != ifa && !ifa_is_destroying(ifa) && 696 new_ifp != NULL && !if_is_deactivated(new_ifp)) { 697 if (oifa && oifa->ifa_rtrequest) 698 oifa->ifa_rtrequest(RTM_DELETE, rt, info); 699 rt_replace_ifa(rt, ifa); 700 rt->rt_ifp = new_ifp; 701 ifp_changed = true; 702 } 703 if (new_ifa == NULL) 704 ifa_release(ifa, &psref_ifa); 705 } 706 ifa_release(new_ifa, &psref_new_ifa); 707 if (new_ifp && rt->rt_ifp != new_ifp && !if_is_deactivated(new_ifp)) { 708 rt->rt_ifp = new_ifp; 709 ifp_changed = true; 710 } 711 rt_setmetrics(rtm->rtm_inits, rtm, rt); 712 if (rt->rt_flags != info->rti_flags) { 713 rt->rt_flags = (info->rti_flags & ~PRESERVED_RTF) | 714 (rt->rt_flags & PRESERVED_RTF); 715 } 716 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 717 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info); 718 #if defined(INET) || defined(INET6) 719 if (ifp_changed && rt_mask(rt) != NULL) 720 lltable_prefix_free(rt_getkey(rt)->sa_family, rt_getkey(rt), 721 rt_mask(rt), 0); 722 #else 723 (void)ifp_changed; /* XXX gcc */ 724 #endif 725 out: 726 if_put(ifp, &psref_ifp); 727 728 return error; 729 } 730 731 /*ARGSUSED*/ 732 int 733 COMPATNAME(route_output)(struct mbuf *m, struct socket *so) 734 { 735 struct sockproto proto = { .sp_family = PF_XROUTE, }; 736 struct rt_xmsghdr *rtm = NULL; 737 struct rt_xmsghdr *old_rtm = NULL, *new_rtm = NULL; 738 struct rtentry *rt = NULL; 739 struct rtentry *saved_nrt = NULL; 740 struct rt_addrinfo info; 741 int len, error = 0; 742 sa_family_t family; 743 struct sockaddr_dl sdl; 744 int bound = curlwp_bind(); 745 bool do_rt_free = false; 746 struct sockaddr_storage netmask; 747 748 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 749 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 750 (m = m_pullup(m, sizeof(int32_t))) == NULL)) { 751 error = ENOBUFS; 752 goto out; 753 } 754 if ((m->m_flags & M_PKTHDR) == 0) 755 panic("%s", __func__); 756 len = m->m_pkthdr.len; 757 if (len < sizeof(*rtm) || 758 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 759 info.rti_info[RTAX_DST] = NULL; 760 senderr(EINVAL); 761 } 762 R_Malloc(rtm, struct rt_xmsghdr *, len); 763 if (rtm == NULL) { 764 info.rti_info[RTAX_DST] = NULL; 765 senderr(ENOBUFS); 766 } 767 m_copydata(m, 0, len, rtm); 768 if (rtm->rtm_version != RTM_XVERSION) { 769 info.rti_info[RTAX_DST] = NULL; 770 senderr(EPROTONOSUPPORT); 771 } 772 rtm->rtm_pid = curproc->p_pid; 773 memset(&info, 0, sizeof(info)); 774 info.rti_addrs = rtm->rtm_addrs; 775 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 776 &info)) { 777 senderr(EINVAL); 778 } 779 info.rti_flags = rtm->rtm_flags; 780 #ifdef RTSOCK_DEBUG 781 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 782 char abuf[INET_ADDRSTRLEN]; 783 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 784 RT_IN_PRINT(&info, abuf, RTAX_DST)); 785 } 786 #endif /* RTSOCK_DEBUG */ 787 if (info.rti_info[RTAX_DST] == NULL || 788 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 789 senderr(EINVAL); 790 } 791 if (info.rti_info[RTAX_GATEWAY] != NULL && 792 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 793 senderr(EINVAL); 794 } 795 796 /* 797 * Verify that the caller has the appropriate privilege; RTM_GET 798 * is the only operation the non-superuser is allowed. 799 */ 800 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 801 0, rtm, NULL, NULL) != 0) 802 senderr(EACCES); 803 804 /* 805 * route(8) passes a sockaddr truncated with prefixlen. 806 * The kernel doesn't expect such sockaddr and need to 807 * use a buffer that is big enough for the sockaddr expected 808 * (padded with 0's). We keep the original length of the sockaddr. 809 */ 810 if (info.rti_info[RTAX_NETMASK]) { 811 socklen_t sa_len = sockaddr_getsize_by_family( 812 info.rti_info[RTAX_NETMASK]->sa_family); 813 socklen_t masklen = sockaddr_getlen( 814 info.rti_info[RTAX_NETMASK]); 815 if (sa_len != 0 && sa_len > masklen) { 816 KASSERT(sa_len <= sizeof(netmask)); 817 memcpy(&netmask, info.rti_info[RTAX_NETMASK], masklen); 818 memset((char *)&netmask + masklen, 0, sa_len - masklen); 819 info.rti_info[RTAX_NETMASK] = sstocsa(&netmask); 820 } 821 } 822 823 switch (rtm->rtm_type) { 824 825 case RTM_ADD: 826 if (info.rti_info[RTAX_GATEWAY] == NULL) { 827 senderr(EINVAL); 828 } 829 #if defined(INET) || defined(INET6) 830 /* support for new ARP/NDP code with keeping backcompat */ 831 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { 832 const struct sockaddr_dl *sdlp = 833 satocsdl(info.rti_info[RTAX_GATEWAY]); 834 835 /* Allow routing requests by interface index */ 836 if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 837 && sdlp->sdl_slen == 0) 838 goto fallback; 839 /* 840 * Old arp binaries don't set the sdl_index 841 * so we have to complement it. 842 */ 843 int sdl_index = sdlp->sdl_index; 844 if (sdl_index == 0) { 845 error = route_get_sdl_index(&info, &sdl_index); 846 if (error != 0) 847 goto fallback; 848 } else if ( 849 info.rti_info[RTAX_DST]->sa_family == AF_INET) { 850 /* 851 * XXX workaround for SIN_PROXY case; proxy arp 852 * entry should be in an interface that has 853 * a network route including the destination, 854 * not a local (link) route that may not be a 855 * desired place, for example a tap. 856 */ 857 const struct sockaddr_inarp *sina = 858 (const struct sockaddr_inarp *) 859 info.rti_info[RTAX_DST]; 860 if (sina->sin_other & SIN_PROXY) { 861 error = route_get_sdl_index(&info, 862 &sdl_index); 863 if (error != 0) 864 goto fallback; 865 } 866 } 867 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 868 rtm->rtm_rmx.rmx_expire, &info, sdl_index); 869 break; 870 } 871 fallback: 872 #endif /* defined(INET) || defined(INET6) */ 873 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 874 if (error == 0) { 875 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 876 rt_unref(saved_nrt); 877 } 878 break; 879 880 case RTM_DELETE: 881 #if defined(INET) || defined(INET6) 882 /* support for new ARP/NDP code */ 883 if (info.rti_info[RTAX_GATEWAY] && 884 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 885 (rtm->rtm_flags & RTF_LLDATA) != 0) { 886 const struct sockaddr_dl *sdlp = 887 satocsdl(info.rti_info[RTAX_GATEWAY]); 888 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 889 rtm->rtm_rmx.rmx_expire, &info, sdlp->sdl_index); 890 rtm->rtm_flags &= ~RTF_UP; 891 break; 892 } 893 #endif 894 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 895 if (error != 0) 896 break; 897 898 rt = saved_nrt; 899 do_rt_free = true; 900 info.rti_info[RTAX_DST] = rt_getkey(rt); 901 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 902 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 903 info.rti_info[RTAX_TAG] = rt_gettag(rt); 904 error = route_output_report(rt, &info, rtm, &new_rtm); 905 if (error) 906 senderr(error); 907 if (new_rtm != NULL) { 908 old_rtm = rtm; 909 rtm = new_rtm; 910 } 911 break; 912 913 case RTM_GET: 914 case RTM_CHANGE: 915 case RTM_LOCK: 916 /* XXX This will mask info.rti_info[RTAX_DST] with 917 * info.rti_info[RTAX_NETMASK] before 918 * searching. It did not used to do that. --dyoung 919 */ 920 rt = NULL; 921 error = rtrequest1(RTM_GET, &info, &rt); 922 if (error != 0) 923 senderr(error); 924 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 925 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 926 info.rti_info[RTAX_DST]->sa_len) != 0) 927 senderr(ESRCH); 928 if (info.rti_info[RTAX_NETMASK] == NULL && 929 rt_mask(rt) != NULL) 930 senderr(ETOOMANYREFS); 931 } 932 933 /* 934 * XXX if arp/ndp requests an L2 entry, we have to obtain 935 * it from lltable while for the route command we have to 936 * return a route as it is. How to distinguish them? 937 * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp 938 * indicates an L2 entry is requested. For old arp/ndp 939 * binaries, we check RTF_UP flag is NOT set; it works 940 * by the fact that arp/ndp don't set it while the route 941 * command sets it. 942 */ 943 if (((rtm->rtm_flags & RTF_LLDATA) != 0 || 944 (rtm->rtm_flags & RTF_UP) == 0) && 945 rtm->rtm_type == RTM_GET && 946 sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { 947 int ll_flags = 0; 948 route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, 949 &ll_flags); 950 info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); 951 error = route_output_report(rt, &info, rtm, &new_rtm); 952 if (error) 953 senderr(error); 954 if (new_rtm != NULL) { 955 old_rtm = rtm; 956 rtm = new_rtm; 957 } 958 rtm->rtm_flags |= RTF_LLDATA; 959 rtm->rtm_flags &= ~RTF_CONNECTED; 960 rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; 961 break; 962 } 963 964 switch (rtm->rtm_type) { 965 case RTM_GET: 966 info.rti_info[RTAX_DST] = rt_getkey(rt); 967 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 968 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 969 info.rti_info[RTAX_TAG] = rt_gettag(rt); 970 error = route_output_report(rt, &info, rtm, &new_rtm); 971 if (error) 972 senderr(error); 973 if (new_rtm != NULL) { 974 old_rtm = rtm; 975 rtm = new_rtm; 976 } 977 break; 978 979 case RTM_CHANGE: 980 #ifdef NET_MPSAFE 981 error = rt_update_prepare(rt); 982 if (error == 0) { 983 error = route_output_change(rt, &info, rtm); 984 rt_update_finish(rt); 985 } 986 #else 987 error = route_output_change(rt, &info, rtm); 988 #endif 989 if (error != 0) 990 goto flush; 991 /*FALLTHROUGH*/ 992 case RTM_LOCK: 993 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 994 rt->rt_rmx.rmx_locks |= 995 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 996 break; 997 } 998 break; 999 1000 default: 1001 senderr(EOPNOTSUPP); 1002 } 1003 1004 flush: 1005 if (rtm) { 1006 if (error) 1007 rtm->rtm_errno = error; 1008 else 1009 rtm->rtm_flags |= RTF_DONE; 1010 } 1011 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 1012 0; 1013 /* We cannot free old_rtm until we have stopped using the 1014 * pointers in info, some of which may point to sockaddrs 1015 * in old_rtm. 1016 */ 1017 if (old_rtm != NULL) 1018 Free(old_rtm); 1019 if (rt) { 1020 if (do_rt_free) 1021 rt_free(rt); 1022 else 1023 rt_unref(rt); 1024 } 1025 { 1026 struct rawcb *rp = NULL; 1027 /* 1028 * Check to see if we don't want our own messages. 1029 */ 1030 if ((so->so_options & SO_USELOOPBACK) == 0) { 1031 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 1032 if (rtm) 1033 Free(rtm); 1034 m_freem(m); 1035 goto out; 1036 } 1037 /* There is another listener, so construct message */ 1038 rp = sotorawcb(so); 1039 } 1040 if (rtm) { 1041 m_copyback(m, 0, rtm->rtm_msglen, rtm); 1042 if (m->m_pkthdr.len < rtm->rtm_msglen) { 1043 m_freem(m); 1044 m = NULL; 1045 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 1046 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 1047 Free(rtm); 1048 } 1049 if (rp) 1050 rp->rcb_proto.sp_family = 0; /* Avoid us */ 1051 if (family) 1052 proto.sp_protocol = family; 1053 if (m) 1054 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 1055 &COMPATNAME(route_info).ri_dst, &rt_rawcb); 1056 if (rp) 1057 rp->rcb_proto.sp_family = PF_XROUTE; 1058 } 1059 out: 1060 curlwp_bindx(bound); 1061 return error; 1062 } 1063 1064 static int 1065 route_ctloutput(int op, struct socket *so, struct sockopt *sopt) 1066 { 1067 struct routecb *rop = sotoroutecb(so); 1068 int error = 0; 1069 unsigned char *rtm_type; 1070 size_t len; 1071 unsigned int msgfilter; 1072 1073 KASSERT(solocked(so)); 1074 1075 if (sopt->sopt_level != AF_ROUTE) { 1076 error = ENOPROTOOPT; 1077 } else switch (op) { 1078 case PRCO_SETOPT: 1079 switch (sopt->sopt_name) { 1080 case RO_MSGFILTER: 1081 msgfilter = 0; 1082 for (rtm_type = sopt->sopt_data, len = sopt->sopt_size; 1083 len != 0; 1084 rtm_type++, len -= sizeof(*rtm_type)) 1085 { 1086 /* Guard against overflowing our storage. */ 1087 if (*rtm_type >= sizeof(msgfilter) * CHAR_BIT) { 1088 error = EOVERFLOW; 1089 break; 1090 } 1091 msgfilter |= RTMSGFILTER(*rtm_type); 1092 } 1093 if (error == 0) 1094 rop->rocb_msgfilter = msgfilter; 1095 break; 1096 default: 1097 error = ENOPROTOOPT; 1098 break; 1099 } 1100 break; 1101 case PRCO_GETOPT: 1102 switch (sopt->sopt_name) { 1103 case RO_MSGFILTER: 1104 error = ENOTSUP; 1105 break; 1106 default: 1107 error = ENOPROTOOPT; 1108 break; 1109 } 1110 } 1111 return error; 1112 } 1113 1114 static void 1115 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 1116 { 1117 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 1118 metric(RTV_RPIPE, rmx_recvpipe); 1119 metric(RTV_SPIPE, rmx_sendpipe); 1120 metric(RTV_SSTHRESH, rmx_ssthresh); 1121 metric(RTV_RTT, rmx_rtt); 1122 metric(RTV_RTTVAR, rmx_rttvar); 1123 metric(RTV_HOPCOUNT, rmx_hopcount); 1124 metric(RTV_MTU, rmx_mtu); 1125 #undef metric 1126 if (which & RTV_EXPIRE) { 1127 out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? 1128 time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; 1129 } 1130 } 1131 1132 static void 1133 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 1134 { 1135 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 1136 metric(rmx_recvpipe); 1137 metric(rmx_sendpipe); 1138 metric(rmx_ssthresh); 1139 metric(rmx_rtt); 1140 metric(rmx_rttvar); 1141 metric(rmx_hopcount); 1142 metric(rmx_mtu); 1143 metric(rmx_locks); 1144 #undef metric 1145 out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? 1146 time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; 1147 } 1148 1149 static int 1150 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 1151 struct rt_addrinfo *rtinfo) 1152 { 1153 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 1154 int i; 1155 1156 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 1157 if ((rtinfo->rti_addrs & (1 << i)) == 0) 1158 continue; 1159 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 1160 RT_XADVANCE(cp, sa); 1161 } 1162 1163 /* 1164 * Check for extra addresses specified, except RTM_GET asking 1165 * for interface info. 1166 */ 1167 if (rtmtype == RTM_GET) { 1168 if (((rtinfo->rti_addrs & 1169 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0U << i)) != 0) 1170 return 1; 1171 } else if ((rtinfo->rti_addrs & (~0U << i)) != 0) 1172 return 1; 1173 /* Check for bad data length. */ 1174 if (cp != cplim) { 1175 if (i == RTAX_NETMASK + 1 && sa != NULL && 1176 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 1177 /* 1178 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 1179 * We accept this for now for the sake of old 1180 * binaries or third party softwares. 1181 */ 1182 ; 1183 else 1184 return 1; 1185 } 1186 return 0; 1187 } 1188 1189 static int 1190 rt_getlen(int type) 1191 { 1192 #ifndef COMPAT_RTSOCK 1193 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 1194 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 1195 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 1196 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 1197 #endif 1198 1199 switch (type) { 1200 case RTM_ODELADDR: 1201 case RTM_ONEWADDR: 1202 case RTM_OCHGADDR: 1203 #ifdef COMPAT_70 1204 return sizeof(struct ifa_msghdr70); 1205 #else 1206 #ifdef RTSOCK_DEBUG 1207 printf("%s: unsupported RTM type %d\n", __func__, type); 1208 #endif 1209 return -1; 1210 #endif 1211 case RTM_DELADDR: 1212 case RTM_NEWADDR: 1213 case RTM_CHGADDR: 1214 return sizeof(struct ifa_xmsghdr); 1215 1216 case RTM_OOIFINFO: 1217 #ifdef COMPAT_14 1218 return sizeof(struct if_msghdr14); 1219 #else 1220 #ifdef RTSOCK_DEBUG 1221 printf("%s: unsupported RTM type RTM_OOIFINFO\n", __func__); 1222 #endif 1223 return -1; 1224 #endif 1225 case RTM_OIFINFO: 1226 #ifdef COMPAT_50 1227 return sizeof(struct if_msghdr50); 1228 #else 1229 #ifdef RTSOCK_DEBUG 1230 printf("%s: unsupported RTM type RTM_OIFINFO\n", __func__); 1231 #endif 1232 return -1; 1233 #endif 1234 1235 case RTM_IFINFO: 1236 return sizeof(struct if_xmsghdr); 1237 1238 case RTM_IFANNOUNCE: 1239 case RTM_IEEE80211: 1240 return sizeof(struct if_xannouncemsghdr); 1241 1242 default: 1243 return sizeof(struct rt_xmsghdr); 1244 } 1245 } 1246 1247 1248 struct mbuf * 1249 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 1250 { 1251 struct rt_xmsghdr *rtm; 1252 struct mbuf *m; 1253 int i; 1254 const struct sockaddr *sa; 1255 int len, dlen; 1256 1257 m = m_gethdr(M_DONTWAIT, MT_DATA); 1258 if (m == NULL) 1259 return m; 1260 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 1261 1262 if ((len = rt_getlen(type)) == -1) 1263 goto out; 1264 if (len > MHLEN + MLEN) 1265 panic("%s: message too long", __func__); 1266 else if (len > MHLEN) { 1267 m->m_next = m_get(M_DONTWAIT, MT_DATA); 1268 if (m->m_next == NULL) 1269 goto out; 1270 MCLAIM(m->m_next, m->m_owner); 1271 m->m_pkthdr.len = len; 1272 m->m_len = MHLEN; 1273 m->m_next->m_len = len - MHLEN; 1274 } else { 1275 m->m_pkthdr.len = m->m_len = len; 1276 } 1277 m_reset_rcvif(m); 1278 m_copyback(m, 0, datalen, data); 1279 if (len > datalen) 1280 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 1281 rtm = mtod(m, struct rt_xmsghdr *); 1282 for (i = 0; i < RTAX_MAX; i++) { 1283 if ((sa = rtinfo->rti_info[i]) == NULL) 1284 continue; 1285 rtinfo->rti_addrs |= (1 << i); 1286 dlen = RT_XROUNDUP(sa->sa_len); 1287 m_copyback(m, len, sa->sa_len, sa); 1288 if (dlen != sa->sa_len) { 1289 /* 1290 * Up to 6 + 1 nul's since roundup is to 1291 * sizeof(uint64_t) (8 bytes) 1292 */ 1293 m_copyback(m, len + sa->sa_len, 1294 dlen - sa->sa_len, "\0\0\0\0\0\0"); 1295 } 1296 len += dlen; 1297 } 1298 if (m->m_pkthdr.len != len) 1299 goto out; 1300 rtm->rtm_msglen = len; 1301 rtm->rtm_version = RTM_XVERSION; 1302 rtm->rtm_type = type; 1303 return m; 1304 out: 1305 m_freem(m); 1306 return NULL; 1307 } 1308 1309 /* 1310 * rt_msg2 1311 * 1312 * fills 'cp' or 'w'.w_tmem with the routing socket message and 1313 * returns the length of the message in 'lenp'. 1314 * 1315 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 1316 * the message 1317 * otherwise walkarg's w_needed is updated and if the user buffer is 1318 * specified and w_needed indicates space exists the information is copied 1319 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 1320 * if the allocation fails ENOBUFS is returned. 1321 */ 1322 static int 1323 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1324 int *lenp) 1325 { 1326 int i; 1327 int len, dlen, second_time = 0; 1328 char *cp0, *cp = cpv; 1329 1330 rtinfo->rti_addrs = 0; 1331 again: 1332 if ((len = rt_getlen(type)) == -1) 1333 return EINVAL; 1334 1335 if ((cp0 = cp) != NULL) 1336 cp += len; 1337 for (i = 0; i < RTAX_MAX; i++) { 1338 const struct sockaddr *sa; 1339 1340 if ((sa = rtinfo->rti_info[i]) == NULL) 1341 continue; 1342 rtinfo->rti_addrs |= (1 << i); 1343 dlen = RT_XROUNDUP(sa->sa_len); 1344 if (cp) { 1345 int diff = dlen - sa->sa_len; 1346 (void)memcpy(cp, sa, (size_t)sa->sa_len); 1347 cp += sa->sa_len; 1348 if (diff > 0) { 1349 (void)memset(cp, 0, (size_t)diff); 1350 cp += diff; 1351 } 1352 } 1353 len += dlen; 1354 } 1355 if (cp == NULL && w != NULL && !second_time) { 1356 struct rt_walkarg *rw = w; 1357 1358 rw->w_needed += len; 1359 if (rw->w_needed <= 0 && rw->w_where) { 1360 if (rw->w_tmemsize < len) { 1361 if (rw->w_tmem) 1362 kmem_free(rw->w_tmem, rw->w_tmemsize); 1363 rw->w_tmem = kmem_alloc(len, KM_SLEEP); 1364 rw->w_tmemsize = len; 1365 } 1366 if (rw->w_tmem) { 1367 cp = rw->w_tmem; 1368 second_time = 1; 1369 goto again; 1370 } else { 1371 rw->w_tmemneeded = len; 1372 return ENOBUFS; 1373 } 1374 } 1375 } 1376 if (cp) { 1377 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 1378 1379 rtm->rtm_version = RTM_XVERSION; 1380 rtm->rtm_type = type; 1381 rtm->rtm_msglen = len; 1382 } 1383 if (lenp) 1384 *lenp = len; 1385 return 0; 1386 } 1387 1388 #ifndef COMPAT_RTSOCK 1389 int 1390 rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1391 int *lenp) 1392 { 1393 return rt_msg2(type, rtinfo, cpv, w, lenp); 1394 } 1395 #endif 1396 1397 /* 1398 * This routine is called to generate a message from the routing 1399 * socket indicating that a redirect has occurred, a routing lookup 1400 * has failed, or that a protocol has detected timeouts to a particular 1401 * destination. 1402 */ 1403 void 1404 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 1405 int error) 1406 { 1407 struct rt_xmsghdr rtm; 1408 struct mbuf *m; 1409 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1410 struct rt_addrinfo info = *rtinfo; 1411 1412 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 1413 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1414 return; 1415 memset(&rtm, 0, sizeof(rtm)); 1416 rtm.rtm_pid = curproc->p_pid; 1417 rtm.rtm_flags = RTF_DONE | flags; 1418 rtm.rtm_errno = error; 1419 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 1420 if (m == NULL) 1421 return; 1422 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1423 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1424 } 1425 1426 /* 1427 * This routine is called to generate a message from the routing 1428 * socket indicating that the status of a network interface has changed. 1429 */ 1430 void 1431 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1432 { 1433 struct if_xmsghdr ifm; 1434 struct mbuf *m; 1435 struct rt_addrinfo info; 1436 1437 COMPATCALL(rt_ifmsg, (ifp)); 1438 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1439 return; 1440 (void)memset(&info, 0, sizeof(info)); 1441 (void)memset(&ifm, 0, sizeof(ifm)); 1442 ifm.ifm_index = ifp->if_index; 1443 ifm.ifm_flags = ifp->if_flags; 1444 ifm.ifm_data = ifp->if_data; 1445 ifm.ifm_addrs = 0; 1446 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1447 if (m == NULL) 1448 return; 1449 COMPATNAME(route_enqueue)(m, 0); 1450 #ifdef COMPAT_14 1451 compat_14_rt_oifmsg(ifp); 1452 #endif 1453 #ifdef COMPAT_50 1454 compat_50_rt_oifmsg(ifp); 1455 #endif 1456 } 1457 1458 #ifndef COMPAT_RTSOCK 1459 static int 1460 if_addrflags(struct ifaddr *ifa) 1461 { 1462 1463 switch (ifa->ifa_addr->sa_family) { 1464 #ifdef INET 1465 case AF_INET: 1466 return ((struct in_ifaddr *)ifa)->ia4_flags; 1467 #endif 1468 #ifdef INET6 1469 case AF_INET6: 1470 return ((struct in6_ifaddr *)ifa)->ia6_flags; 1471 #endif 1472 default: 1473 return 0; 1474 } 1475 } 1476 #endif 1477 1478 /* 1479 * This is called to generate messages from the routing socket 1480 * indicating a network interface has had addresses associated with it. 1481 * if we ever reverse the logic and replace messages TO the routing 1482 * socket indicate a request to configure interfaces, then it will 1483 * be unnecessary as the routing socket will automatically generate 1484 * copies of it. 1485 */ 1486 void 1487 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1488 struct rtentry *rt) 1489 { 1490 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1491 struct rt_addrinfo info; 1492 const struct sockaddr *sa; 1493 int pass; 1494 struct mbuf *m; 1495 struct ifnet *ifp; 1496 struct rt_xmsghdr rtm; 1497 struct ifa_xmsghdr ifam; 1498 int ncmd; 1499 1500 KASSERT(ifa != NULL); 1501 KASSERT(ifa->ifa_addr != NULL); 1502 ifp = ifa->ifa_ifp; 1503 #ifdef SCTP 1504 if (cmd == RTM_ADD) { 1505 sctp_add_ip_address(ifa); 1506 } else if (cmd == RTM_DELETE) { 1507 sctp_delete_ip_address(ifa); 1508 } 1509 #endif 1510 1511 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1512 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1513 return; 1514 for (pass = 1; pass < 3; pass++) { 1515 memset(&info, 0, sizeof(info)); 1516 switch (cmdpass(cmd, pass)) { 1517 case cmdpass(RTM_ADD, 1): 1518 case cmdpass(RTM_CHANGE, 1): 1519 case cmdpass(RTM_DELETE, 2): 1520 case cmdpass(RTM_NEWADDR, 1): 1521 case cmdpass(RTM_DELADDR, 1): 1522 case cmdpass(RTM_CHGADDR, 1): 1523 switch (cmd) { 1524 case RTM_ADD: 1525 ncmd = RTM_XNEWADDR; 1526 break; 1527 case RTM_DELETE: 1528 ncmd = RTM_XDELADDR; 1529 break; 1530 case RTM_CHANGE: 1531 ncmd = RTM_XCHGADDR; 1532 break; 1533 case RTM_NEWADDR: 1534 ncmd = RTM_XNEWADDR; 1535 break; 1536 case RTM_DELADDR: 1537 ncmd = RTM_XDELADDR; 1538 break; 1539 case RTM_CHGADDR: 1540 ncmd = RTM_XCHGADDR; 1541 break; 1542 default: 1543 panic("%s: unknown command %d", __func__, cmd); 1544 } 1545 #ifdef COMPAT_70 1546 compat_70_rt_newaddrmsg1(ncmd, ifa); 1547 #endif 1548 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1549 KASSERT(ifp->if_dl != NULL); 1550 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1551 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1552 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1553 memset(&ifam, 0, sizeof(ifam)); 1554 ifam.ifam_index = ifp->if_index; 1555 ifam.ifam_metric = ifa->ifa_metric; 1556 ifam.ifam_flags = ifa->ifa_flags; 1557 #ifndef COMPAT_RTSOCK 1558 ifam.ifam_pid = curproc->p_pid; 1559 ifam.ifam_addrflags = if_addrflags(ifa); 1560 #endif 1561 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1562 if (m == NULL) 1563 continue; 1564 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1565 info.rti_addrs; 1566 break; 1567 case cmdpass(RTM_ADD, 2): 1568 case cmdpass(RTM_CHANGE, 2): 1569 case cmdpass(RTM_DELETE, 1): 1570 if (rt == NULL) 1571 continue; 1572 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1573 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1574 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1575 memset(&rtm, 0, sizeof(rtm)); 1576 rtm.rtm_pid = curproc->p_pid; 1577 rtm.rtm_index = ifp->if_index; 1578 rtm.rtm_flags |= rt->rt_flags; 1579 rtm.rtm_errno = error; 1580 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1581 if (m == NULL) 1582 continue; 1583 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1584 break; 1585 default: 1586 continue; 1587 } 1588 KASSERTMSG(m != NULL, "called with wrong command"); 1589 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1590 } 1591 #undef cmdpass 1592 1593 } 1594 1595 static struct mbuf * 1596 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1597 struct rt_addrinfo *info) 1598 { 1599 struct if_xannouncemsghdr ifan; 1600 1601 memset(info, 0, sizeof(*info)); 1602 memset(&ifan, 0, sizeof(ifan)); 1603 ifan.ifan_index = ifp->if_index; 1604 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1605 ifan.ifan_what = what; 1606 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1607 } 1608 1609 /* 1610 * This is called to generate routing socket messages indicating 1611 * network interface arrival and departure. 1612 */ 1613 void 1614 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1615 { 1616 struct mbuf *m; 1617 struct rt_addrinfo info; 1618 1619 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1620 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1621 return; 1622 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1623 if (m == NULL) 1624 return; 1625 COMPATNAME(route_enqueue)(m, 0); 1626 } 1627 1628 /* 1629 * This is called to generate routing socket messages indicating 1630 * IEEE80211 wireless events. 1631 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1632 */ 1633 void 1634 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1635 size_t data_len) 1636 { 1637 struct mbuf *m; 1638 struct rt_addrinfo info; 1639 1640 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1641 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1642 return; 1643 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1644 if (m == NULL) 1645 return; 1646 /* 1647 * Append the ieee80211 data. Try to stick it in the 1648 * mbuf containing the ifannounce msg; otherwise allocate 1649 * a new mbuf and append. 1650 * 1651 * NB: we assume m is a single mbuf. 1652 */ 1653 if (data_len > M_TRAILINGSPACE(m)) { 1654 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1655 if (n == NULL) { 1656 m_freem(m); 1657 return; 1658 } 1659 (void)memcpy(mtod(n, void *), data, data_len); 1660 n->m_len = data_len; 1661 m->m_next = n; 1662 } else if (data_len > 0) { 1663 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1664 m->m_len += data_len; 1665 } 1666 if (m->m_flags & M_PKTHDR) 1667 m->m_pkthdr.len += data_len; 1668 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1669 COMPATNAME(route_enqueue)(m, 0); 1670 } 1671 1672 #ifndef COMPAT_RTSOCK 1673 /* 1674 * Send a routing message as mimicing that a cloned route is added. 1675 */ 1676 void 1677 rt_clonedmsg(const struct sockaddr *dst, const struct ifnet *ifp, 1678 const struct rtentry *rt) 1679 { 1680 struct rt_addrinfo info; 1681 /* Mimic flags exactly */ 1682 #define RTF_LLINFO 0x400 1683 #define RTF_CLONED 0x2000 1684 int flags = RTF_UP | RTF_HOST | RTF_DONE | RTF_LLINFO | RTF_CLONED; 1685 union { 1686 struct sockaddr sa; 1687 struct sockaddr_storage ss; 1688 struct sockaddr_dl sdl; 1689 } u; 1690 uint8_t namelen = strlen(ifp->if_xname); 1691 uint8_t addrlen = ifp->if_addrlen; 1692 1693 if (rt == NULL) 1694 return; /* XXX */ 1695 1696 memset(&info, 0, sizeof(info)); 1697 info.rti_info[RTAX_DST] = dst; 1698 sockaddr_dl_init(&u.sdl, sizeof(u.ss), ifp->if_index, ifp->if_type, 1699 NULL, namelen, NULL, addrlen); 1700 info.rti_info[RTAX_GATEWAY] = &u.sa; 1701 1702 rt_missmsg(RTM_ADD, &info, flags, 0); 1703 #undef RTF_LLINFO 1704 #undef RTF_CLONED 1705 } 1706 #endif /* COMPAT_RTSOCK */ 1707 1708 /* 1709 * This is used in dumping the kernel table via sysctl(). 1710 */ 1711 static int 1712 sysctl_dumpentry(struct rtentry *rt, void *v) 1713 { 1714 struct rt_walkarg *w = v; 1715 int error = 0, size; 1716 struct rt_addrinfo info; 1717 1718 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1719 return 0; 1720 memset(&info, 0, sizeof(info)); 1721 info.rti_info[RTAX_DST] = rt_getkey(rt); 1722 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1723 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1724 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1725 if (rt->rt_ifp) { 1726 const struct ifaddr *rtifa; 1727 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1728 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1729 * then rt_get_ifa() != NULL. So this ought to still be safe. 1730 * --dyoung 1731 */ 1732 rtifa = rt_get_ifa(rt); 1733 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1734 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1735 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1736 } 1737 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1738 return error; 1739 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1740 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1741 1742 rtm->rtm_flags = rt->rt_flags; 1743 rtm->rtm_use = rt->rt_use; 1744 rtm_setmetrics(rt, rtm); 1745 KASSERT(rt->rt_ifp != NULL); 1746 rtm->rtm_index = rt->rt_ifp->if_index; 1747 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1748 rtm->rtm_addrs = info.rti_addrs; 1749 if ((error = copyout(rtm, w->w_where, size)) != 0) 1750 w->w_where = NULL; 1751 else 1752 w->w_where = (char *)w->w_where + size; 1753 } 1754 return error; 1755 } 1756 1757 static int 1758 sysctl_iflist_if(struct ifnet *ifp, struct rt_walkarg *w, 1759 struct rt_addrinfo *info, size_t len) 1760 { 1761 struct if_xmsghdr *ifm; 1762 int error; 1763 1764 ifm = (struct if_xmsghdr *)w->w_tmem; 1765 ifm->ifm_index = ifp->if_index; 1766 ifm->ifm_flags = ifp->if_flags; 1767 ifm->ifm_data = ifp->if_data; 1768 ifm->ifm_addrs = info->rti_addrs; 1769 if ((error = copyout(ifm, w->w_where, len)) == 0) 1770 w->w_where = (char *)w->w_where + len; 1771 return error; 1772 } 1773 1774 static int 1775 sysctl_iflist_addr(struct rt_walkarg *w, struct ifaddr *ifa, 1776 struct rt_addrinfo *info) 1777 { 1778 int len, error; 1779 1780 if ((error = rt_msg2(RTM_XNEWADDR, info, 0, w, &len))) 1781 return error; 1782 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1783 struct ifa_xmsghdr *ifam; 1784 1785 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1786 ifam->ifam_index = ifa->ifa_ifp->if_index; 1787 ifam->ifam_flags = ifa->ifa_flags; 1788 ifam->ifam_metric = ifa->ifa_metric; 1789 ifam->ifam_addrs = info->rti_addrs; 1790 #ifndef COMPAT_RTSOCK 1791 ifam->ifam_pid = 0; 1792 ifam->ifam_addrflags = if_addrflags(ifa); 1793 #endif 1794 if ((error = copyout(w->w_tmem, w->w_where, len)) == 0) 1795 w->w_where = (char *)w->w_where + len; 1796 } 1797 return error; 1798 } 1799 1800 static int 1801 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1802 { 1803 struct ifnet *ifp; 1804 struct ifaddr *ifa; 1805 struct rt_addrinfo info; 1806 int cmd, len, error = 0; 1807 int (*iflist_if)(struct ifnet *, struct rt_walkarg *, 1808 struct rt_addrinfo *, size_t); 1809 int (*iflist_addr)(struct rt_walkarg *, struct ifaddr *, 1810 struct rt_addrinfo *); 1811 int s; 1812 struct psref psref; 1813 int bound; 1814 1815 switch (type) { 1816 case NET_RT_IFLIST: 1817 cmd = RTM_IFINFO; 1818 iflist_if = sysctl_iflist_if; 1819 iflist_addr = sysctl_iflist_addr; 1820 break; 1821 #ifdef COMPAT_14 1822 case NET_RT_OOOIFLIST: 1823 cmd = RTM_OOIFINFO; 1824 iflist_if = compat_14_iflist; 1825 iflist_addr = compat_70_iflist_addr; 1826 break; 1827 #endif 1828 #ifdef COMPAT_50 1829 case NET_RT_OOIFLIST: 1830 cmd = RTM_OIFINFO; 1831 iflist_if = compat_50_iflist; 1832 iflist_addr = compat_70_iflist_addr; 1833 break; 1834 #endif 1835 #ifdef COMPAT_70 1836 case NET_RT_OIFLIST: 1837 cmd = RTM_IFINFO; 1838 iflist_if = sysctl_iflist_if; 1839 iflist_addr = compat_70_iflist_addr; 1840 break; 1841 #endif 1842 default: 1843 #ifdef RTSOCK_DEBUG 1844 printf("%s: unsupported IFLIST type %d\n", __func__, type); 1845 #endif 1846 return EINVAL; 1847 } 1848 1849 memset(&info, 0, sizeof(info)); 1850 1851 bound = curlwp_bind(); 1852 s = pserialize_read_enter(); 1853 IFNET_READER_FOREACH(ifp) { 1854 int _s; 1855 if (w->w_arg && w->w_arg != ifp->if_index) 1856 continue; 1857 if (IFADDR_READER_EMPTY(ifp)) 1858 continue; 1859 1860 if_acquire(ifp, &psref); 1861 pserialize_read_exit(s); 1862 1863 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1864 if ((error = rt_msg2(cmd, &info, NULL, w, &len)) != 0) 1865 goto release_exit; 1866 info.rti_info[RTAX_IFP] = NULL; 1867 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1868 if ((error = iflist_if(ifp, w, &info, len)) != 0) 1869 goto release_exit; 1870 } 1871 _s = pserialize_read_enter(); 1872 IFADDR_READER_FOREACH(ifa, ifp) { 1873 struct psref _psref; 1874 if (af && af != ifa->ifa_addr->sa_family) 1875 continue; 1876 ifa_acquire(ifa, &_psref); 1877 pserialize_read_exit(_s); 1878 1879 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1880 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1881 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1882 error = iflist_addr(w, ifa, &info); 1883 1884 _s = pserialize_read_enter(); 1885 ifa_release(ifa, &_psref); 1886 if (error != 0) { 1887 pserialize_read_exit(_s); 1888 goto release_exit; 1889 } 1890 } 1891 pserialize_read_exit(_s); 1892 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1893 info.rti_info[RTAX_BRD] = NULL; 1894 1895 s = pserialize_read_enter(); 1896 if_release(ifp, &psref); 1897 } 1898 pserialize_read_exit(s); 1899 curlwp_bindx(bound); 1900 1901 return 0; 1902 1903 release_exit: 1904 if_release(ifp, &psref); 1905 curlwp_bindx(bound); 1906 return error; 1907 } 1908 1909 static int 1910 sysctl_rtable(SYSCTLFN_ARGS) 1911 { 1912 void *where = oldp; 1913 size_t *given = oldlenp; 1914 int i, s, error = EINVAL; 1915 u_char af; 1916 struct rt_walkarg w; 1917 1918 if (namelen == 1 && name[0] == CTL_QUERY) 1919 return sysctl_query(SYSCTLFN_CALL(rnode)); 1920 1921 if (newp) 1922 return EPERM; 1923 if (namelen != 3) 1924 return EINVAL; 1925 af = name[0]; 1926 w.w_tmemneeded = 0; 1927 w.w_tmemsize = 0; 1928 w.w_tmem = NULL; 1929 again: 1930 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1931 if (w.w_tmemneeded) { 1932 w.w_tmem = kmem_alloc(w.w_tmemneeded, KM_SLEEP); 1933 w.w_tmemsize = w.w_tmemneeded; 1934 w.w_tmemneeded = 0; 1935 } 1936 w.w_op = name[1]; 1937 w.w_arg = name[2]; 1938 w.w_given = *given; 1939 w.w_needed = 0 - w.w_given; 1940 w.w_where = where; 1941 1942 s = splsoftnet(); 1943 switch (w.w_op) { 1944 1945 case NET_RT_DUMP: 1946 case NET_RT_FLAGS: 1947 #if defined(INET) || defined(INET6) 1948 /* 1949 * take care of llinfo entries, the caller must 1950 * specify an AF 1951 */ 1952 if (w.w_op == NET_RT_FLAGS && 1953 (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { 1954 if (af != 0) 1955 error = lltable_sysctl_dump(af, &w); 1956 else 1957 error = EINVAL; 1958 break; 1959 } 1960 #endif 1961 1962 for (i = 1; i <= AF_MAX; i++) { 1963 if (af == 0 || af == i) { 1964 error = rt_walktree(i, sysctl_dumpentry, &w); 1965 if (error != 0) 1966 break; 1967 #if defined(INET) || defined(INET6) 1968 /* 1969 * Return ARP/NDP entries too for 1970 * backward compatibility. 1971 */ 1972 error = lltable_sysctl_dump(i, &w); 1973 if (error != 0) 1974 break; 1975 #endif 1976 } 1977 } 1978 break; 1979 1980 #ifdef COMPAT_14 1981 case NET_RT_OOOIFLIST: 1982 error = sysctl_iflist(af, &w, w.w_op); 1983 break; 1984 #endif 1985 #ifdef COMPAT_50 1986 case NET_RT_OOIFLIST: 1987 error = sysctl_iflist(af, &w, w.w_op); 1988 break; 1989 #endif 1990 #ifdef COMPAT_70 1991 case NET_RT_OIFLIST: 1992 error = sysctl_iflist(af, &w, w.w_op); 1993 break; 1994 #endif 1995 case NET_RT_IFLIST: 1996 error = sysctl_iflist(af, &w, w.w_op); 1997 break; 1998 } 1999 splx(s); 2000 2001 /* check to see if we couldn't allocate memory with NOWAIT */ 2002 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 2003 goto again; 2004 2005 if (w.w_tmem) 2006 kmem_free(w.w_tmem, w.w_tmemsize); 2007 w.w_needed += w.w_given; 2008 if (where) { 2009 *given = (char *)w.w_where - (char *)where; 2010 if (*given < w.w_needed) 2011 return ENOMEM; 2012 } else { 2013 *given = (11 * w.w_needed) / 10; 2014 } 2015 return error; 2016 } 2017 2018 /* 2019 * Routing message software interrupt routine 2020 */ 2021 static void 2022 COMPATNAME(route_intr)(void *cookie) 2023 { 2024 struct sockproto proto = { .sp_family = PF_XROUTE, }; 2025 struct route_info * const ri = &COMPATNAME(route_info); 2026 struct mbuf *m; 2027 2028 mutex_enter(softnet_lock); 2029 KERNEL_LOCK(1, NULL); 2030 for (;;) { 2031 IFQ_LOCK(&ri->ri_intrq); 2032 IF_DEQUEUE(&ri->ri_intrq, m); 2033 IFQ_UNLOCK(&ri->ri_intrq); 2034 if (m == NULL) 2035 break; 2036 proto.sp_protocol = M_GETCTX(m, uintptr_t); 2037 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst, &rt_rawcb); 2038 } 2039 KERNEL_UNLOCK_ONE(NULL); 2040 mutex_exit(softnet_lock); 2041 } 2042 2043 /* 2044 * Enqueue a message to the software interrupt routine. 2045 */ 2046 void 2047 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 2048 { 2049 struct route_info * const ri = &COMPATNAME(route_info); 2050 int wasempty; 2051 2052 IFQ_LOCK(&ri->ri_intrq); 2053 if (IF_QFULL(&ri->ri_intrq)) { 2054 IF_DROP(&ri->ri_intrq); 2055 IFQ_UNLOCK(&ri->ri_intrq); 2056 m_freem(m); 2057 } else { 2058 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 2059 M_SETCTX(m, (uintptr_t)family); 2060 IF_ENQUEUE(&ri->ri_intrq, m); 2061 IFQ_UNLOCK(&ri->ri_intrq); 2062 if (wasempty) { 2063 kpreempt_disable(); 2064 softint_schedule(ri->ri_sih); 2065 kpreempt_enable(); 2066 } 2067 } 2068 } 2069 2070 static void 2071 COMPATNAME(route_init)(void) 2072 { 2073 struct route_info * const ri = &COMPATNAME(route_info); 2074 2075 #ifndef COMPAT_RTSOCK 2076 rt_init(); 2077 #endif 2078 2079 sysctl_net_route_setup(NULL); 2080 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 2081 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 2082 COMPATNAME(route_intr), NULL); 2083 IFQ_LOCK_INIT(&ri->ri_intrq); 2084 } 2085 2086 /* 2087 * Definitions of protocols supported in the ROUTE domain. 2088 */ 2089 #ifndef COMPAT_RTSOCK 2090 PR_WRAP_USRREQS(route); 2091 #else 2092 PR_WRAP_USRREQS(compat_50_route); 2093 #endif 2094 2095 static const struct pr_usrreqs route_usrreqs = { 2096 .pr_attach = COMPATNAME(route_attach_wrapper), 2097 .pr_detach = COMPATNAME(route_detach_wrapper), 2098 .pr_accept = COMPATNAME(route_accept_wrapper), 2099 .pr_bind = COMPATNAME(route_bind_wrapper), 2100 .pr_listen = COMPATNAME(route_listen_wrapper), 2101 .pr_connect = COMPATNAME(route_connect_wrapper), 2102 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 2103 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 2104 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 2105 .pr_abort = COMPATNAME(route_abort_wrapper), 2106 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 2107 .pr_stat = COMPATNAME(route_stat_wrapper), 2108 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 2109 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 2110 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 2111 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 2112 .pr_send = COMPATNAME(route_send_wrapper), 2113 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 2114 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 2115 }; 2116 2117 static const struct protosw COMPATNAME(route_protosw)[] = { 2118 { 2119 .pr_type = SOCK_RAW, 2120 .pr_domain = &COMPATNAME(routedomain), 2121 .pr_flags = PR_ATOMIC|PR_ADDR, 2122 .pr_input = raw_input, 2123 .pr_ctlinput = raw_ctlinput, 2124 .pr_ctloutput = route_ctloutput, 2125 .pr_usrreqs = &route_usrreqs, 2126 .pr_init = rt_pr_init, 2127 }, 2128 }; 2129 2130 struct domain COMPATNAME(routedomain) = { 2131 .dom_family = PF_XROUTE, 2132 .dom_name = DOMAINNAME, 2133 .dom_init = COMPATNAME(route_init), 2134 .dom_protosw = COMPATNAME(route_protosw), 2135 .dom_protoswNPROTOSW = 2136 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 2137 }; 2138 2139 static void 2140 sysctl_net_route_setup(struct sysctllog **clog) 2141 { 2142 const struct sysctlnode *rnode = NULL; 2143 2144 sysctl_createv(clog, 0, NULL, &rnode, 2145 CTLFLAG_PERMANENT, 2146 CTLTYPE_NODE, DOMAINNAME, 2147 SYSCTL_DESCR("PF_ROUTE information"), 2148 NULL, 0, NULL, 0, 2149 CTL_NET, PF_XROUTE, CTL_EOL); 2150 2151 sysctl_createv(clog, 0, NULL, NULL, 2152 CTLFLAG_PERMANENT, 2153 CTLTYPE_NODE, "rtable", 2154 SYSCTL_DESCR("Routing table information"), 2155 sysctl_rtable, 0, NULL, 0, 2156 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 2157 2158 sysctl_createv(clog, 0, &rnode, NULL, 2159 CTLFLAG_PERMANENT, 2160 CTLTYPE_STRUCT, "stats", 2161 SYSCTL_DESCR("Routing statistics"), 2162 NULL, 0, &rtstat, sizeof(rtstat), 2163 CTL_CREATE, CTL_EOL); 2164 } 2165
Indexes created Mon Sep 22 13:09:51 GMT 2025