rtsock.c revision 1.217
1 /* $NetBSD: rtsock.c,v 1.217 2017/06/22 09:58:04 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 1.217 2017/06/22 09:58:04 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 int 243 COMPATNAME(route_attach)(struct socket *so, int proto) 244 { 245 struct rawcb *rp; 246 struct routecb *rop; 247 int s, error; 248 249 KASSERT(sotorawcb(so) == NULL); 250 rop = kmem_zalloc(sizeof(*rop), KM_SLEEP); 251 rp = &rop->rocb_rcb; 252 rp->rcb_len = sizeof(*rop); 253 so->so_pcb = rp; 254 255 s = splsoftnet(); 256 if ((error = raw_attach(so, proto)) == 0) { 257 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 258 rp->rcb_laddr = &COMPATNAME(route_info).ri_src; 259 rp->rcb_faddr = &COMPATNAME(route_info).ri_dst; 260 rp->rcb_filter = COMPATNAME(route_filter); 261 } 262 splx(s); 263 264 if (error) { 265 kmem_free(rop, sizeof(*rop)); 266 so->so_pcb = NULL; 267 return error; 268 } 269 270 soisconnected(so); 271 so->so_options |= SO_USELOOPBACK; 272 KASSERT(solocked(so)); 273 274 return error; 275 } 276 277 static void 278 COMPATNAME(route_detach)(struct socket *so) 279 { 280 struct rawcb *rp = sotorawcb(so); 281 int s; 282 283 KASSERT(rp != NULL); 284 KASSERT(solocked(so)); 285 286 s = splsoftnet(); 287 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 288 raw_detach(so); 289 splx(s); 290 } 291 292 static int 293 COMPATNAME(route_accept)(struct socket *so, struct sockaddr *nam) 294 { 295 KASSERT(solocked(so)); 296 297 panic("route_accept"); 298 299 return EOPNOTSUPP; 300 } 301 302 static int 303 COMPATNAME(route_bind)(struct socket *so, struct sockaddr *nam, struct lwp *l) 304 { 305 KASSERT(solocked(so)); 306 307 return EOPNOTSUPP; 308 } 309 310 static int 311 COMPATNAME(route_listen)(struct socket *so, struct lwp *l) 312 { 313 KASSERT(solocked(so)); 314 315 return EOPNOTSUPP; 316 } 317 318 static int 319 COMPATNAME(route_connect)(struct socket *so, struct sockaddr *nam, struct lwp *l) 320 { 321 KASSERT(solocked(so)); 322 323 return EOPNOTSUPP; 324 } 325 326 static int 327 COMPATNAME(route_connect2)(struct socket *so, struct socket *so2) 328 { 329 KASSERT(solocked(so)); 330 331 return EOPNOTSUPP; 332 } 333 334 static int 335 COMPATNAME(route_disconnect)(struct socket *so) 336 { 337 struct rawcb *rp = sotorawcb(so); 338 int s; 339 340 KASSERT(solocked(so)); 341 KASSERT(rp != NULL); 342 343 s = splsoftnet(); 344 soisdisconnected(so); 345 raw_disconnect(rp); 346 splx(s); 347 348 return 0; 349 } 350 351 static int 352 COMPATNAME(route_shutdown)(struct socket *so) 353 { 354 int s; 355 356 KASSERT(solocked(so)); 357 358 /* 359 * Mark the connection as being incapable of further input. 360 */ 361 s = splsoftnet(); 362 socantsendmore(so); 363 splx(s); 364 return 0; 365 } 366 367 static int 368 COMPATNAME(route_abort)(struct socket *so) 369 { 370 KASSERT(solocked(so)); 371 372 panic("route_abort"); 373 374 return EOPNOTSUPP; 375 } 376 377 static int 378 COMPATNAME(route_ioctl)(struct socket *so, u_long cmd, void *nam, 379 struct ifnet * ifp) 380 { 381 return EOPNOTSUPP; 382 } 383 384 static int 385 COMPATNAME(route_stat)(struct socket *so, struct stat *ub) 386 { 387 KASSERT(solocked(so)); 388 389 return 0; 390 } 391 392 static int 393 COMPATNAME(route_peeraddr)(struct socket *so, struct sockaddr *nam) 394 { 395 struct rawcb *rp = sotorawcb(so); 396 397 KASSERT(solocked(so)); 398 KASSERT(rp != NULL); 399 KASSERT(nam != NULL); 400 401 if (rp->rcb_faddr == NULL) 402 return ENOTCONN; 403 404 raw_setpeeraddr(rp, nam); 405 return 0; 406 } 407 408 static int 409 COMPATNAME(route_sockaddr)(struct socket *so, struct sockaddr *nam) 410 { 411 struct rawcb *rp = sotorawcb(so); 412 413 KASSERT(solocked(so)); 414 KASSERT(rp != NULL); 415 KASSERT(nam != NULL); 416 417 if (rp->rcb_faddr == NULL) 418 return ENOTCONN; 419 420 raw_setsockaddr(rp, nam); 421 return 0; 422 } 423 424 static int 425 COMPATNAME(route_rcvd)(struct socket *so, int flags, struct lwp *l) 426 { 427 KASSERT(solocked(so)); 428 429 return EOPNOTSUPP; 430 } 431 432 static int 433 COMPATNAME(route_recvoob)(struct socket *so, struct mbuf *m, int flags) 434 { 435 KASSERT(solocked(so)); 436 437 return EOPNOTSUPP; 438 } 439 440 static int 441 COMPATNAME(route_send)(struct socket *so, struct mbuf *m, 442 struct sockaddr *nam, struct mbuf *control, struct lwp *l) 443 { 444 int error = 0; 445 int s; 446 447 KASSERT(solocked(so)); 448 KASSERT(so->so_proto == &COMPATNAME(route_protosw)[0]); 449 450 s = splsoftnet(); 451 error = raw_send(so, m, nam, control, l, &COMPATNAME(route_output)); 452 splx(s); 453 454 return error; 455 } 456 457 static int 458 COMPATNAME(route_sendoob)(struct socket *so, struct mbuf *m, 459 struct mbuf *control) 460 { 461 KASSERT(solocked(so)); 462 463 m_freem(m); 464 m_freem(control); 465 466 return EOPNOTSUPP; 467 } 468 static int 469 COMPATNAME(route_purgeif)(struct socket *so, struct ifnet *ifp) 470 { 471 472 panic("route_purgeif"); 473 474 return EOPNOTSUPP; 475 } 476 477 #ifdef INET 478 static int 479 route_get_sdl_index(struct rt_addrinfo *info, int *sdl_index) 480 { 481 struct rtentry *nrt; 482 int error; 483 484 error = rtrequest1(RTM_GET, info, &nrt); 485 if (error != 0) 486 return error; 487 /* 488 * nrt->rt_ifp->if_index may not be correct 489 * due to changing to ifplo0. 490 */ 491 *sdl_index = satosdl(nrt->rt_gateway)->sdl_index; 492 rt_unref(nrt); 493 494 return 0; 495 } 496 #endif /* INET */ 497 498 static void 499 route_get_sdl(const struct ifnet *ifp, const struct sockaddr *dst, 500 struct sockaddr_dl *sdl, int *flags) 501 { 502 struct llentry *la; 503 504 KASSERT(ifp != NULL); 505 506 IF_AFDATA_RLOCK(ifp); 507 switch (dst->sa_family) { 508 case AF_INET: 509 la = lla_lookup(LLTABLE(ifp), 0, dst); 510 break; 511 case AF_INET6: 512 la = lla_lookup(LLTABLE6(ifp), 0, dst); 513 break; 514 default: 515 la = NULL; 516 KASSERTMSG(0, "Invalid AF=%d\n", dst->sa_family); 517 break; 518 } 519 IF_AFDATA_RUNLOCK(ifp); 520 521 void *a = (LLE_IS_VALID(la) && (la->la_flags & LLE_VALID) == LLE_VALID) 522 ? &la->ll_addr : NULL; 523 524 a = sockaddr_dl_init(sdl, sizeof(*sdl), ifp->if_index, ifp->if_type, 525 NULL, 0, a, ifp->if_addrlen); 526 KASSERT(a != NULL); 527 528 if (la != NULL) { 529 *flags = la->la_flags; 530 LLE_RUNLOCK(la); 531 } 532 } 533 534 static int 535 route_output_report(struct rtentry *rt, struct rt_addrinfo *info, 536 struct rt_xmsghdr *rtm, struct rt_xmsghdr **new_rtm) 537 { 538 int len; 539 540 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 541 const struct ifaddr *rtifa; 542 const struct ifnet *ifp = rt->rt_ifp; 543 544 info->rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 545 /* rtifa used to be simply rt->rt_ifa. 546 * If rt->rt_ifa != NULL, then 547 * rt_get_ifa() != NULL. So this 548 * ought to still be safe. --dyoung 549 */ 550 rtifa = rt_get_ifa(rt); 551 info->rti_info[RTAX_IFA] = rtifa->ifa_addr; 552 #ifdef RTSOCK_DEBUG 553 if (info->rti_info[RTAX_IFA]->sa_family == AF_INET) { 554 char ibuf[INET_ADDRSTRLEN]; 555 char abuf[INET_ADDRSTRLEN]; 556 printf("%s: copying out RTAX_IFA %s " 557 "for info->rti_info[RTAX_DST] %s " 558 "ifa_getifa %p ifa_seqno %p\n", 559 __func__, 560 RT_IN_PRINT(info, ibuf, RTAX_IFA), 561 RT_IN_PRINT(info, abuf, RTAX_DST), 562 (void *)rtifa->ifa_getifa, 563 rtifa->ifa_seqno); 564 } 565 #endif /* RTSOCK_DEBUG */ 566 if (ifp->if_flags & IFF_POINTOPOINT) 567 info->rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 568 else 569 info->rti_info[RTAX_BRD] = NULL; 570 rtm->rtm_index = ifp->if_index; 571 } 572 (void)rt_msg2(rtm->rtm_type, info, NULL, NULL, &len); 573 if (len > rtm->rtm_msglen) { 574 struct rt_xmsghdr *old_rtm = rtm; 575 R_Malloc(*new_rtm, struct rt_xmsghdr *, len); 576 if (*new_rtm == NULL) 577 return ENOBUFS; 578 (void)memcpy(*new_rtm, old_rtm, old_rtm->rtm_msglen); 579 rtm = *new_rtm; 580 } 581 (void)rt_msg2(rtm->rtm_type, info, rtm, NULL, 0); 582 rtm->rtm_flags = rt->rt_flags; 583 rtm_setmetrics(rt, rtm); 584 rtm->rtm_addrs = info->rti_addrs; 585 586 return 0; 587 } 588 589 static struct ifaddr * 590 route_output_get_ifa(const struct rt_addrinfo info, const struct rtentry *rt, 591 struct ifnet **ifp, struct psref *psref) 592 { 593 struct ifaddr *ifa = NULL; 594 595 *ifp = NULL; 596 if (info.rti_info[RTAX_IFP] != NULL) { 597 ifa = ifa_ifwithnet_psref(info.rti_info[RTAX_IFP], psref); 598 if (ifa == NULL) 599 goto next; 600 *ifp = ifa->ifa_ifp; 601 if (info.rti_info[RTAX_IFA] == NULL && 602 info.rti_info[RTAX_GATEWAY] == NULL) 603 goto next; 604 if (info.rti_info[RTAX_IFA] == NULL) { 605 /* route change <dst> <gw> -ifp <if> */ 606 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_GATEWAY], 607 *ifp, psref); 608 } else { 609 /* route change <dst> -ifp <if> -ifa <addr> */ 610 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 611 if (ifa != NULL) 612 goto out; 613 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_IFA], 614 *ifp, psref); 615 } 616 goto out; 617 } 618 next: 619 if (info.rti_info[RTAX_IFA] != NULL) { 620 /* route change <dst> <gw> -ifa <addr> */ 621 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 622 if (ifa != NULL) 623 goto out; 624 } 625 if (info.rti_info[RTAX_GATEWAY] != NULL) { 626 /* route change <dst> <gw> */ 627 ifa = ifa_ifwithroute_psref(rt->rt_flags, rt_getkey(rt), 628 info.rti_info[RTAX_GATEWAY], psref); 629 } 630 out: 631 if (ifa != NULL && *ifp == NULL) 632 *ifp = ifa->ifa_ifp; 633 return ifa; 634 } 635 636 static int 637 route_output_change(struct rtentry *rt, struct rt_addrinfo *info, 638 struct rt_xmsghdr *rtm) 639 { 640 int error = 0; 641 struct ifnet *ifp = NULL, *new_ifp; 642 struct ifaddr *ifa = NULL, *new_ifa; 643 struct psref psref_ifa, psref_new_ifa, psref_ifp; 644 bool newgw, ifp_changed = false; 645 646 /* 647 * New gateway could require new ifaddr, ifp; 648 * flags may also be different; ifp may be specified 649 * by ll sockaddr when protocol address is ambiguous 650 */ 651 newgw = info->rti_info[RTAX_GATEWAY] != NULL && 652 sockaddr_cmp(info->rti_info[RTAX_GATEWAY], rt->rt_gateway) != 0; 653 654 if (newgw || info->rti_info[RTAX_IFP] != NULL || 655 info->rti_info[RTAX_IFA] != NULL) { 656 ifp = rt_getifp(info, &psref_ifp); 657 ifa = rt_getifa(info, &psref_ifa); 658 if (ifa == NULL) { 659 error = ENETUNREACH; 660 goto out; 661 } 662 } 663 if (newgw) { 664 error = rt_setgate(rt, info->rti_info[RTAX_GATEWAY]); 665 if (error != 0) 666 goto out; 667 } 668 if (info->rti_info[RTAX_TAG]) { 669 const struct sockaddr *tag; 670 tag = rt_settag(rt, info->rti_info[RTAX_TAG]); 671 if (tag == NULL) { 672 error = ENOBUFS; 673 goto out; 674 } 675 } 676 /* 677 * New gateway could require new ifaddr, ifp; 678 * flags may also be different; ifp may be specified 679 * by ll sockaddr when protocol address is ambiguous 680 */ 681 new_ifa = route_output_get_ifa(*info, rt, &new_ifp, &psref_new_ifa); 682 if (new_ifa != NULL) { 683 ifa_release(ifa, &psref_ifa); 684 ifa = new_ifa; 685 } 686 if (ifa) { 687 struct ifaddr *oifa = rt->rt_ifa; 688 if (oifa != ifa && !ifa_is_destroying(ifa) && 689 new_ifp != NULL && !if_is_deactivated(new_ifp)) { 690 if (oifa && oifa->ifa_rtrequest) 691 oifa->ifa_rtrequest(RTM_DELETE, rt, info); 692 rt_replace_ifa(rt, ifa); 693 rt->rt_ifp = new_ifp; 694 ifp_changed = true; 695 } 696 if (new_ifa == NULL) 697 ifa_release(ifa, &psref_ifa); 698 } 699 ifa_release(new_ifa, &psref_new_ifa); 700 if (new_ifp && rt->rt_ifp != new_ifp && !if_is_deactivated(new_ifp)) { 701 rt->rt_ifp = new_ifp; 702 ifp_changed = true; 703 } 704 rt_setmetrics(rtm->rtm_inits, rtm, rt); 705 if (rt->rt_flags != info->rti_flags) { 706 rt->rt_flags = (info->rti_flags & ~PRESERVED_RTF) | 707 (rt->rt_flags & PRESERVED_RTF); 708 } 709 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 710 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info); 711 #if defined(INET) || defined(INET6) 712 if (ifp_changed && rt_mask(rt) != NULL) 713 lltable_prefix_free(rt_getkey(rt)->sa_family, rt_getkey(rt), 714 rt_mask(rt), 0); 715 #endif 716 out: 717 if_put(ifp, &psref_ifp); 718 719 return error; 720 } 721 722 /*ARGSUSED*/ 723 int 724 COMPATNAME(route_output)(struct mbuf *m, struct socket *so) 725 { 726 struct sockproto proto = { .sp_family = PF_XROUTE, }; 727 struct rt_xmsghdr *rtm = NULL; 728 struct rt_xmsghdr *old_rtm = NULL, *new_rtm = NULL; 729 struct rtentry *rt = NULL; 730 struct rtentry *saved_nrt = NULL; 731 struct rt_addrinfo info; 732 int len, error = 0; 733 sa_family_t family; 734 struct sockaddr_dl sdl; 735 int bound = curlwp_bind(); 736 bool do_rt_free = false; 737 738 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 739 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 740 (m = m_pullup(m, sizeof(int32_t))) == NULL)) { 741 error = ENOBUFS; 742 goto out; 743 } 744 if ((m->m_flags & M_PKTHDR) == 0) 745 panic("%s", __func__); 746 len = m->m_pkthdr.len; 747 if (len < sizeof(*rtm) || 748 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 749 info.rti_info[RTAX_DST] = NULL; 750 senderr(EINVAL); 751 } 752 R_Malloc(rtm, struct rt_xmsghdr *, len); 753 if (rtm == NULL) { 754 info.rti_info[RTAX_DST] = NULL; 755 senderr(ENOBUFS); 756 } 757 m_copydata(m, 0, len, rtm); 758 if (rtm->rtm_version != RTM_XVERSION) { 759 info.rti_info[RTAX_DST] = NULL; 760 senderr(EPROTONOSUPPORT); 761 } 762 rtm->rtm_pid = curproc->p_pid; 763 memset(&info, 0, sizeof(info)); 764 info.rti_addrs = rtm->rtm_addrs; 765 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 766 &info)) { 767 senderr(EINVAL); 768 } 769 info.rti_flags = rtm->rtm_flags; 770 #ifdef RTSOCK_DEBUG 771 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 772 char abuf[INET_ADDRSTRLEN]; 773 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 774 RT_IN_PRINT(&info, abuf, RTAX_DST)); 775 } 776 #endif /* RTSOCK_DEBUG */ 777 if (info.rti_info[RTAX_DST] == NULL || 778 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 779 senderr(EINVAL); 780 } 781 if (info.rti_info[RTAX_GATEWAY] != NULL && 782 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 783 senderr(EINVAL); 784 } 785 786 /* 787 * Verify that the caller has the appropriate privilege; RTM_GET 788 * is the only operation the non-superuser is allowed. 789 */ 790 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 791 0, rtm, NULL, NULL) != 0) 792 senderr(EACCES); 793 794 switch (rtm->rtm_type) { 795 796 case RTM_ADD: 797 if (info.rti_info[RTAX_GATEWAY] == NULL) { 798 senderr(EINVAL); 799 } 800 #ifdef INET 801 /* support for new ARP code with keeping backcompat */ 802 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { 803 const struct sockaddr_dl *sdlp = 804 satocsdl(info.rti_info[RTAX_GATEWAY]); 805 806 /* Allow routing requests by interface index */ 807 if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 808 && sdlp->sdl_slen == 0) 809 goto fallback; 810 /* 811 * Old arp binaries don't set the sdl_index 812 * so we have to complement it. 813 */ 814 int sdl_index = sdlp->sdl_index; 815 if (sdl_index == 0) { 816 error = route_get_sdl_index(&info, &sdl_index); 817 if (error != 0) 818 goto fallback; 819 } else if ( 820 info.rti_info[RTAX_DST]->sa_family == AF_INET) { 821 /* 822 * XXX workaround for SIN_PROXY case; proxy arp 823 * entry should be in an interface that has 824 * a network route including the destination, 825 * not a local (link) route that may not be a 826 * desired place, for example a tap. 827 */ 828 const struct sockaddr_inarp *sina = 829 (const struct sockaddr_inarp *) 830 info.rti_info[RTAX_DST]; 831 if (sina->sin_other & SIN_PROXY) { 832 error = route_get_sdl_index(&info, 833 &sdl_index); 834 if (error != 0) 835 goto fallback; 836 } 837 } 838 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 839 rtm->rtm_rmx.rmx_expire, &info, sdl_index); 840 break; 841 } 842 fallback: 843 #endif /* INET */ 844 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 845 if (error == 0) { 846 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 847 rt_unref(saved_nrt); 848 } 849 break; 850 851 case RTM_DELETE: 852 #ifdef INET 853 /* support for new ARP code */ 854 if (info.rti_info[RTAX_GATEWAY] && 855 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 856 (rtm->rtm_flags & RTF_LLDATA) != 0) { 857 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 858 rtm->rtm_rmx.rmx_expire, &info, 0); 859 break; 860 } 861 #endif /* INET */ 862 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 863 if (error != 0) 864 break; 865 866 rt = saved_nrt; 867 do_rt_free = true; 868 info.rti_info[RTAX_DST] = rt_getkey(rt); 869 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 870 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 871 info.rti_info[RTAX_TAG] = rt_gettag(rt); 872 error = route_output_report(rt, &info, rtm, &new_rtm); 873 if (error) 874 senderr(error); 875 if (new_rtm != NULL) { 876 old_rtm = rtm; 877 rtm = new_rtm; 878 } 879 break; 880 881 case RTM_GET: 882 case RTM_CHANGE: 883 case RTM_LOCK: 884 /* XXX This will mask info.rti_info[RTAX_DST] with 885 * info.rti_info[RTAX_NETMASK] before 886 * searching. It did not used to do that. --dyoung 887 */ 888 rt = NULL; 889 error = rtrequest1(RTM_GET, &info, &rt); 890 if (error != 0) 891 senderr(error); 892 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 893 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 894 info.rti_info[RTAX_DST]->sa_len) != 0) 895 senderr(ESRCH); 896 if (info.rti_info[RTAX_NETMASK] == NULL && 897 rt_mask(rt) != NULL) 898 senderr(ETOOMANYREFS); 899 } 900 901 /* 902 * XXX if arp/ndp requests an L2 entry, we have to obtain 903 * it from lltable while for the route command we have to 904 * return a route as it is. How to distinguish them? 905 * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp 906 * indicates an L2 entry is requested. For old arp/ndp 907 * binaries, we check RTF_UP flag is NOT set; it works 908 * by the fact that arp/ndp don't set it while the route 909 * command sets it. 910 */ 911 if (((rtm->rtm_flags & RTF_LLDATA) != 0 || 912 (rtm->rtm_flags & RTF_UP) == 0) && 913 rtm->rtm_type == RTM_GET && 914 sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { 915 int ll_flags = 0; 916 route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, 917 &ll_flags); 918 info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); 919 error = route_output_report(rt, &info, rtm, &new_rtm); 920 if (error) 921 senderr(error); 922 if (new_rtm != NULL) { 923 old_rtm = rtm; 924 rtm = new_rtm; 925 } 926 rtm->rtm_flags |= RTF_LLDATA; 927 rtm->rtm_flags &= ~RTF_CONNECTED; 928 rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; 929 break; 930 } 931 932 switch (rtm->rtm_type) { 933 case RTM_GET: 934 info.rti_info[RTAX_DST] = rt_getkey(rt); 935 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 936 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 937 info.rti_info[RTAX_TAG] = rt_gettag(rt); 938 error = route_output_report(rt, &info, rtm, &new_rtm); 939 if (error) 940 senderr(error); 941 if (new_rtm != NULL) { 942 old_rtm = rtm; 943 rtm = new_rtm; 944 } 945 break; 946 947 case RTM_CHANGE: 948 #ifdef NET_MPSAFE 949 error = rt_update_prepare(rt); 950 if (error == 0) { 951 error = route_output_change(rt, &info, rtm); 952 rt_update_finish(rt); 953 } 954 #else 955 error = route_output_change(rt, &info, rtm); 956 #endif 957 if (error != 0) 958 goto flush; 959 /*FALLTHROUGH*/ 960 case RTM_LOCK: 961 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 962 rt->rt_rmx.rmx_locks |= 963 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 964 break; 965 } 966 break; 967 968 default: 969 senderr(EOPNOTSUPP); 970 } 971 972 flush: 973 if (rtm) { 974 if (error) 975 rtm->rtm_errno = error; 976 else 977 rtm->rtm_flags |= RTF_DONE; 978 } 979 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 980 0; 981 /* We cannot free old_rtm until we have stopped using the 982 * pointers in info, some of which may point to sockaddrs 983 * in old_rtm. 984 */ 985 if (old_rtm != NULL) 986 Free(old_rtm); 987 if (rt) { 988 if (do_rt_free) 989 rt_free(rt); 990 else 991 rt_unref(rt); 992 } 993 { 994 struct rawcb *rp = NULL; 995 /* 996 * Check to see if we don't want our own messages. 997 */ 998 if ((so->so_options & SO_USELOOPBACK) == 0) { 999 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 1000 if (rtm) 1001 Free(rtm); 1002 m_freem(m); 1003 goto out; 1004 } 1005 /* There is another listener, so construct message */ 1006 rp = sotorawcb(so); 1007 } 1008 if (rtm) { 1009 m_copyback(m, 0, rtm->rtm_msglen, rtm); 1010 if (m->m_pkthdr.len < rtm->rtm_msglen) { 1011 m_freem(m); 1012 m = NULL; 1013 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 1014 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 1015 Free(rtm); 1016 } 1017 if (rp) 1018 rp->rcb_proto.sp_family = 0; /* Avoid us */ 1019 if (family) 1020 proto.sp_protocol = family; 1021 if (m) 1022 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 1023 &COMPATNAME(route_info).ri_dst); 1024 if (rp) 1025 rp->rcb_proto.sp_family = PF_XROUTE; 1026 } 1027 out: 1028 curlwp_bindx(bound); 1029 return error; 1030 } 1031 1032 static int 1033 route_ctloutput(int op, struct socket *so, struct sockopt *sopt) 1034 { 1035 struct routecb *rop = sotoroutecb(so); 1036 int error = 0; 1037 unsigned char *rtm_type; 1038 size_t len; 1039 unsigned int msgfilter; 1040 1041 KASSERT(solocked(so)); 1042 1043 if (sopt->sopt_level != AF_ROUTE) { 1044 error = ENOPROTOOPT; 1045 } else switch (op) { 1046 case PRCO_SETOPT: 1047 switch (sopt->sopt_name) { 1048 case RO_MSGFILTER: 1049 msgfilter = 0; 1050 for (rtm_type = sopt->sopt_data, len = sopt->sopt_size; 1051 len != 0; 1052 rtm_type++, len -= sizeof(*rtm_type)) 1053 { 1054 /* Guard against overflowing our storage. */ 1055 if (*rtm_type >= sizeof(msgfilter) * CHAR_BIT) { 1056 error = EOVERFLOW; 1057 break; 1058 } 1059 msgfilter |= RTMSGFILTER(*rtm_type); 1060 } 1061 if (error == 0) 1062 rop->rocb_msgfilter = msgfilter; 1063 break; 1064 default: 1065 error = ENOPROTOOPT; 1066 break; 1067 } 1068 break; 1069 case PRCO_GETOPT: 1070 switch (sopt->sopt_name) { 1071 case RO_MSGFILTER: 1072 error = ENOTSUP; 1073 break; 1074 default: 1075 error = ENOPROTOOPT; 1076 break; 1077 } 1078 } 1079 return error; 1080 } 1081 1082 static void 1083 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 1084 { 1085 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 1086 metric(RTV_RPIPE, rmx_recvpipe); 1087 metric(RTV_SPIPE, rmx_sendpipe); 1088 metric(RTV_SSTHRESH, rmx_ssthresh); 1089 metric(RTV_RTT, rmx_rtt); 1090 metric(RTV_RTTVAR, rmx_rttvar); 1091 metric(RTV_HOPCOUNT, rmx_hopcount); 1092 metric(RTV_MTU, rmx_mtu); 1093 #undef metric 1094 if (which & RTV_EXPIRE) { 1095 out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? 1096 time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; 1097 } 1098 } 1099 1100 static void 1101 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 1102 { 1103 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 1104 metric(rmx_recvpipe); 1105 metric(rmx_sendpipe); 1106 metric(rmx_ssthresh); 1107 metric(rmx_rtt); 1108 metric(rmx_rttvar); 1109 metric(rmx_hopcount); 1110 metric(rmx_mtu); 1111 metric(rmx_locks); 1112 #undef metric 1113 out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? 1114 time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; 1115 } 1116 1117 static int 1118 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 1119 struct rt_addrinfo *rtinfo) 1120 { 1121 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 1122 int i; 1123 1124 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 1125 if ((rtinfo->rti_addrs & (1 << i)) == 0) 1126 continue; 1127 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 1128 RT_XADVANCE(cp, sa); 1129 } 1130 1131 /* 1132 * Check for extra addresses specified, except RTM_GET asking 1133 * for interface info. 1134 */ 1135 if (rtmtype == RTM_GET) { 1136 if (((rtinfo->rti_addrs & 1137 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0U << i)) != 0) 1138 return 1; 1139 } else if ((rtinfo->rti_addrs & (~0U << i)) != 0) 1140 return 1; 1141 /* Check for bad data length. */ 1142 if (cp != cplim) { 1143 if (i == RTAX_NETMASK + 1 && sa != NULL && 1144 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 1145 /* 1146 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 1147 * We accept this for now for the sake of old 1148 * binaries or third party softwares. 1149 */ 1150 ; 1151 else 1152 return 1; 1153 } 1154 return 0; 1155 } 1156 1157 static int 1158 rt_getlen(int type) 1159 { 1160 #ifndef COMPAT_RTSOCK 1161 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 1162 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 1163 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 1164 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 1165 #endif 1166 1167 switch (type) { 1168 case RTM_ODELADDR: 1169 case RTM_ONEWADDR: 1170 case RTM_OCHGADDR: 1171 #ifdef COMPAT_70 1172 return sizeof(struct ifa_msghdr70); 1173 #else 1174 #ifdef RTSOCK_DEBUG 1175 printf("%s: unsupported RTM type %d\n", __func__, type); 1176 #endif 1177 return -1; 1178 #endif 1179 case RTM_DELADDR: 1180 case RTM_NEWADDR: 1181 case RTM_CHGADDR: 1182 return sizeof(struct ifa_xmsghdr); 1183 1184 case RTM_OOIFINFO: 1185 #ifdef COMPAT_14 1186 return sizeof(struct if_msghdr14); 1187 #else 1188 #ifdef RTSOCK_DEBUG 1189 printf("%s: unsupported RTM type RTM_OOIFINFO\n", __func__); 1190 #endif 1191 return -1; 1192 #endif 1193 case RTM_OIFINFO: 1194 #ifdef COMPAT_50 1195 return sizeof(struct if_msghdr50); 1196 #else 1197 #ifdef RTSOCK_DEBUG 1198 printf("%s: unsupported RTM type RTM_OIFINFO\n", __func__); 1199 #endif 1200 return -1; 1201 #endif 1202 1203 case RTM_IFINFO: 1204 return sizeof(struct if_xmsghdr); 1205 1206 case RTM_IFANNOUNCE: 1207 case RTM_IEEE80211: 1208 return sizeof(struct if_xannouncemsghdr); 1209 1210 default: 1211 return sizeof(struct rt_xmsghdr); 1212 } 1213 } 1214 1215 1216 struct mbuf * 1217 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 1218 { 1219 struct rt_xmsghdr *rtm; 1220 struct mbuf *m; 1221 int i; 1222 const struct sockaddr *sa; 1223 int len, dlen; 1224 1225 m = m_gethdr(M_DONTWAIT, MT_DATA); 1226 if (m == NULL) 1227 return m; 1228 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 1229 1230 if ((len = rt_getlen(type)) == -1) 1231 goto out; 1232 if (len > MHLEN + MLEN) 1233 panic("%s: message too long", __func__); 1234 else if (len > MHLEN) { 1235 m->m_next = m_get(M_DONTWAIT, MT_DATA); 1236 if (m->m_next == NULL) 1237 goto out; 1238 MCLAIM(m->m_next, m->m_owner); 1239 m->m_pkthdr.len = len; 1240 m->m_len = MHLEN; 1241 m->m_next->m_len = len - MHLEN; 1242 } else { 1243 m->m_pkthdr.len = m->m_len = len; 1244 } 1245 m_reset_rcvif(m); 1246 m_copyback(m, 0, datalen, data); 1247 if (len > datalen) 1248 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 1249 rtm = mtod(m, struct rt_xmsghdr *); 1250 for (i = 0; i < RTAX_MAX; i++) { 1251 if ((sa = rtinfo->rti_info[i]) == NULL) 1252 continue; 1253 rtinfo->rti_addrs |= (1 << i); 1254 dlen = RT_XROUNDUP(sa->sa_len); 1255 m_copyback(m, len, sa->sa_len, sa); 1256 if (dlen != sa->sa_len) { 1257 /* 1258 * Up to 6 + 1 nul's since roundup is to 1259 * sizeof(uint64_t) (8 bytes) 1260 */ 1261 m_copyback(m, len + sa->sa_len, 1262 dlen - sa->sa_len, "\0\0\0\0\0\0"); 1263 } 1264 len += dlen; 1265 } 1266 if (m->m_pkthdr.len != len) 1267 goto out; 1268 rtm->rtm_msglen = len; 1269 rtm->rtm_version = RTM_XVERSION; 1270 rtm->rtm_type = type; 1271 return m; 1272 out: 1273 m_freem(m); 1274 return NULL; 1275 } 1276 1277 /* 1278 * rt_msg2 1279 * 1280 * fills 'cp' or 'w'.w_tmem with the routing socket message and 1281 * returns the length of the message in 'lenp'. 1282 * 1283 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 1284 * the message 1285 * otherwise walkarg's w_needed is updated and if the user buffer is 1286 * specified and w_needed indicates space exists the information is copied 1287 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 1288 * if the allocation fails ENOBUFS is returned. 1289 */ 1290 static int 1291 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1292 int *lenp) 1293 { 1294 int i; 1295 int len, dlen, second_time = 0; 1296 char *cp0, *cp = cpv; 1297 1298 rtinfo->rti_addrs = 0; 1299 again: 1300 if ((len = rt_getlen(type)) == -1) 1301 return EINVAL; 1302 1303 if ((cp0 = cp) != NULL) 1304 cp += len; 1305 for (i = 0; i < RTAX_MAX; i++) { 1306 const struct sockaddr *sa; 1307 1308 if ((sa = rtinfo->rti_info[i]) == NULL) 1309 continue; 1310 rtinfo->rti_addrs |= (1 << i); 1311 dlen = RT_XROUNDUP(sa->sa_len); 1312 if (cp) { 1313 int diff = dlen - sa->sa_len; 1314 (void)memcpy(cp, sa, (size_t)sa->sa_len); 1315 cp += sa->sa_len; 1316 if (diff > 0) { 1317 (void)memset(cp, 0, (size_t)diff); 1318 cp += diff; 1319 } 1320 } 1321 len += dlen; 1322 } 1323 if (cp == NULL && w != NULL && !second_time) { 1324 struct rt_walkarg *rw = w; 1325 1326 rw->w_needed += len; 1327 if (rw->w_needed <= 0 && rw->w_where) { 1328 if (rw->w_tmemsize < len) { 1329 if (rw->w_tmem) 1330 kmem_free(rw->w_tmem, rw->w_tmemsize); 1331 rw->w_tmem = kmem_alloc(len, KM_SLEEP); 1332 rw->w_tmemsize = len; 1333 } 1334 if (rw->w_tmem) { 1335 cp = rw->w_tmem; 1336 second_time = 1; 1337 goto again; 1338 } else { 1339 rw->w_tmemneeded = len; 1340 return ENOBUFS; 1341 } 1342 } 1343 } 1344 if (cp) { 1345 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 1346 1347 rtm->rtm_version = RTM_XVERSION; 1348 rtm->rtm_type = type; 1349 rtm->rtm_msglen = len; 1350 } 1351 if (lenp) 1352 *lenp = len; 1353 return 0; 1354 } 1355 1356 #ifndef COMPAT_RTSOCK 1357 int 1358 rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1359 int *lenp) 1360 { 1361 return rt_msg2(type, rtinfo, cpv, w, lenp); 1362 } 1363 #endif 1364 1365 /* 1366 * This routine is called to generate a message from the routing 1367 * socket indicating that a redirect has occurred, a routing lookup 1368 * has failed, or that a protocol has detected timeouts to a particular 1369 * destination. 1370 */ 1371 void 1372 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 1373 int error) 1374 { 1375 struct rt_xmsghdr rtm; 1376 struct mbuf *m; 1377 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1378 struct rt_addrinfo info = *rtinfo; 1379 1380 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 1381 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1382 return; 1383 memset(&rtm, 0, sizeof(rtm)); 1384 rtm.rtm_pid = curproc->p_pid; 1385 rtm.rtm_flags = RTF_DONE | flags; 1386 rtm.rtm_errno = error; 1387 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 1388 if (m == NULL) 1389 return; 1390 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1391 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1392 } 1393 1394 /* 1395 * This routine is called to generate a message from the routing 1396 * socket indicating that the status of a network interface has changed. 1397 */ 1398 void 1399 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1400 { 1401 struct if_xmsghdr ifm; 1402 struct mbuf *m; 1403 struct rt_addrinfo info; 1404 1405 COMPATCALL(rt_ifmsg, (ifp)); 1406 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1407 return; 1408 (void)memset(&info, 0, sizeof(info)); 1409 (void)memset(&ifm, 0, sizeof(ifm)); 1410 ifm.ifm_index = ifp->if_index; 1411 ifm.ifm_flags = ifp->if_flags; 1412 ifm.ifm_data = ifp->if_data; 1413 ifm.ifm_addrs = 0; 1414 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1415 if (m == NULL) 1416 return; 1417 COMPATNAME(route_enqueue)(m, 0); 1418 #ifdef COMPAT_14 1419 compat_14_rt_oifmsg(ifp); 1420 #endif 1421 #ifdef COMPAT_50 1422 compat_50_rt_oifmsg(ifp); 1423 #endif 1424 } 1425 1426 #ifndef COMPAT_RTSOCK 1427 static int 1428 if_addrflags(struct ifaddr *ifa) 1429 { 1430 1431 switch (ifa->ifa_addr->sa_family) { 1432 #ifdef INET 1433 case AF_INET: 1434 return ((struct in_ifaddr *)ifa)->ia4_flags; 1435 #endif 1436 #ifdef INET6 1437 case AF_INET6: 1438 return ((struct in6_ifaddr *)ifa)->ia6_flags; 1439 #endif 1440 default: 1441 return 0; 1442 } 1443 } 1444 #endif 1445 1446 /* 1447 * This is called to generate messages from the routing socket 1448 * indicating a network interface has had addresses associated with it. 1449 * if we ever reverse the logic and replace messages TO the routing 1450 * socket indicate a request to configure interfaces, then it will 1451 * be unnecessary as the routing socket will automatically generate 1452 * copies of it. 1453 */ 1454 void 1455 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1456 struct rtentry *rt) 1457 { 1458 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1459 struct rt_addrinfo info; 1460 const struct sockaddr *sa; 1461 int pass; 1462 struct mbuf *m; 1463 struct ifnet *ifp; 1464 struct rt_xmsghdr rtm; 1465 struct ifa_xmsghdr ifam; 1466 int ncmd; 1467 1468 KASSERT(ifa != NULL); 1469 KASSERT(ifa->ifa_addr != NULL); 1470 ifp = ifa->ifa_ifp; 1471 #ifdef SCTP 1472 if (cmd == RTM_ADD) { 1473 sctp_add_ip_address(ifa); 1474 } else if (cmd == RTM_DELETE) { 1475 sctp_delete_ip_address(ifa); 1476 } 1477 #endif 1478 1479 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1480 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1481 return; 1482 for (pass = 1; pass < 3; pass++) { 1483 memset(&info, 0, sizeof(info)); 1484 switch (cmdpass(cmd, pass)) { 1485 case cmdpass(RTM_ADD, 1): 1486 case cmdpass(RTM_CHANGE, 1): 1487 case cmdpass(RTM_DELETE, 2): 1488 case cmdpass(RTM_NEWADDR, 1): 1489 case cmdpass(RTM_DELADDR, 1): 1490 case cmdpass(RTM_CHGADDR, 1): 1491 switch (cmd) { 1492 case RTM_ADD: 1493 ncmd = RTM_XNEWADDR; 1494 break; 1495 case RTM_DELETE: 1496 ncmd = RTM_XDELADDR; 1497 break; 1498 case RTM_CHANGE: 1499 ncmd = RTM_XCHGADDR; 1500 break; 1501 case RTM_NEWADDR: 1502 ncmd = RTM_XNEWADDR; 1503 break; 1504 case RTM_DELADDR: 1505 ncmd = RTM_XDELADDR; 1506 break; 1507 case RTM_CHGADDR: 1508 ncmd = RTM_XCHGADDR; 1509 break; 1510 default: 1511 panic("%s: unknown command %d", __func__, cmd); 1512 } 1513 #ifdef COMPAT_70 1514 compat_70_rt_newaddrmsg1(ncmd, ifa); 1515 #endif 1516 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1517 KASSERT(ifp->if_dl != NULL); 1518 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1519 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1520 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1521 memset(&ifam, 0, sizeof(ifam)); 1522 ifam.ifam_index = ifp->if_index; 1523 ifam.ifam_metric = ifa->ifa_metric; 1524 ifam.ifam_flags = ifa->ifa_flags; 1525 #ifndef COMPAT_RTSOCK 1526 ifam.ifam_pid = curproc->p_pid; 1527 ifam.ifam_addrflags = if_addrflags(ifa); 1528 #endif 1529 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1530 if (m == NULL) 1531 continue; 1532 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1533 info.rti_addrs; 1534 break; 1535 case cmdpass(RTM_ADD, 2): 1536 case cmdpass(RTM_CHANGE, 2): 1537 case cmdpass(RTM_DELETE, 1): 1538 if (rt == NULL) 1539 continue; 1540 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1541 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1542 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1543 memset(&rtm, 0, sizeof(rtm)); 1544 rtm.rtm_pid = curproc->p_pid; 1545 rtm.rtm_index = ifp->if_index; 1546 rtm.rtm_flags |= rt->rt_flags; 1547 rtm.rtm_errno = error; 1548 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1549 if (m == NULL) 1550 continue; 1551 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1552 break; 1553 default: 1554 continue; 1555 } 1556 KASSERTMSG(m != NULL, "called with wrong command"); 1557 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1558 } 1559 #undef cmdpass 1560 1561 } 1562 1563 static struct mbuf * 1564 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1565 struct rt_addrinfo *info) 1566 { 1567 struct if_xannouncemsghdr ifan; 1568 1569 memset(info, 0, sizeof(*info)); 1570 memset(&ifan, 0, sizeof(ifan)); 1571 ifan.ifan_index = ifp->if_index; 1572 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1573 ifan.ifan_what = what; 1574 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1575 } 1576 1577 /* 1578 * This is called to generate routing socket messages indicating 1579 * network interface arrival and departure. 1580 */ 1581 void 1582 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1583 { 1584 struct mbuf *m; 1585 struct rt_addrinfo info; 1586 1587 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1588 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1589 return; 1590 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1591 if (m == NULL) 1592 return; 1593 COMPATNAME(route_enqueue)(m, 0); 1594 } 1595 1596 /* 1597 * This is called to generate routing socket messages indicating 1598 * IEEE80211 wireless events. 1599 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1600 */ 1601 void 1602 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1603 size_t data_len) 1604 { 1605 struct mbuf *m; 1606 struct rt_addrinfo info; 1607 1608 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1609 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1610 return; 1611 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1612 if (m == NULL) 1613 return; 1614 /* 1615 * Append the ieee80211 data. Try to stick it in the 1616 * mbuf containing the ifannounce msg; otherwise allocate 1617 * a new mbuf and append. 1618 * 1619 * NB: we assume m is a single mbuf. 1620 */ 1621 if (data_len > M_TRAILINGSPACE(m)) { 1622 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1623 if (n == NULL) { 1624 m_freem(m); 1625 return; 1626 } 1627 (void)memcpy(mtod(n, void *), data, data_len); 1628 n->m_len = data_len; 1629 m->m_next = n; 1630 } else if (data_len > 0) { 1631 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1632 m->m_len += data_len; 1633 } 1634 if (m->m_flags & M_PKTHDR) 1635 m->m_pkthdr.len += data_len; 1636 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1637 COMPATNAME(route_enqueue)(m, 0); 1638 } 1639 1640 #ifndef COMPAT_RTSOCK 1641 /* 1642 * Send a routing message as mimicing that a cloned route is added. 1643 */ 1644 void 1645 rt_clonedmsg(const struct sockaddr *dst, const struct ifnet *ifp, 1646 const struct rtentry *rt) 1647 { 1648 struct rt_addrinfo info; 1649 /* Mimic flags exactly */ 1650 #define RTF_LLINFO 0x400 1651 #define RTF_CLONED 0x2000 1652 int flags = RTF_UP | RTF_HOST | RTF_DONE | RTF_LLINFO | RTF_CLONED; 1653 union { 1654 struct sockaddr sa; 1655 struct sockaddr_storage ss; 1656 struct sockaddr_dl sdl; 1657 } u; 1658 uint8_t namelen = strlen(ifp->if_xname); 1659 uint8_t addrlen = ifp->if_addrlen; 1660 1661 if (rt == NULL) 1662 return; /* XXX */ 1663 1664 memset(&info, 0, sizeof(info)); 1665 info.rti_info[RTAX_DST] = dst; 1666 sockaddr_dl_init(&u.sdl, sizeof(u.ss), ifp->if_index, ifp->if_type, 1667 NULL, namelen, NULL, addrlen); 1668 info.rti_info[RTAX_GATEWAY] = &u.sa; 1669 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1670 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; 1671 1672 rt_missmsg(RTM_ADD, &info, flags, 0); 1673 #undef RTF_LLINFO 1674 #undef RTF_CLONED 1675 } 1676 #endif /* COMPAT_RTSOCK */ 1677 1678 /* 1679 * This is used in dumping the kernel table via sysctl(). 1680 */ 1681 static int 1682 sysctl_dumpentry(struct rtentry *rt, void *v) 1683 { 1684 struct rt_walkarg *w = v; 1685 int error = 0, size; 1686 struct rt_addrinfo info; 1687 1688 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1689 return 0; 1690 memset(&info, 0, sizeof(info)); 1691 info.rti_info[RTAX_DST] = rt_getkey(rt); 1692 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1693 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1694 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1695 if (rt->rt_ifp) { 1696 const struct ifaddr *rtifa; 1697 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1698 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1699 * then rt_get_ifa() != NULL. So this ought to still be safe. 1700 * --dyoung 1701 */ 1702 rtifa = rt_get_ifa(rt); 1703 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1704 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1705 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1706 } 1707 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1708 return error; 1709 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1710 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1711 1712 rtm->rtm_flags = rt->rt_flags; 1713 rtm->rtm_use = rt->rt_use; 1714 rtm_setmetrics(rt, rtm); 1715 KASSERT(rt->rt_ifp != NULL); 1716 rtm->rtm_index = rt->rt_ifp->if_index; 1717 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1718 rtm->rtm_addrs = info.rti_addrs; 1719 if ((error = copyout(rtm, w->w_where, size)) != 0) 1720 w->w_where = NULL; 1721 else 1722 w->w_where = (char *)w->w_where + size; 1723 } 1724 return error; 1725 } 1726 1727 static int 1728 sysctl_iflist_if(struct ifnet *ifp, struct rt_walkarg *w, 1729 struct rt_addrinfo *info, size_t len) 1730 { 1731 struct if_xmsghdr *ifm; 1732 int error; 1733 1734 ifm = (struct if_xmsghdr *)w->w_tmem; 1735 ifm->ifm_index = ifp->if_index; 1736 ifm->ifm_flags = ifp->if_flags; 1737 ifm->ifm_data = ifp->if_data; 1738 ifm->ifm_addrs = info->rti_addrs; 1739 if ((error = copyout(ifm, w->w_where, len)) == 0) 1740 w->w_where = (char *)w->w_where + len; 1741 return error; 1742 } 1743 1744 static int 1745 sysctl_iflist_addr(struct rt_walkarg *w, struct ifaddr *ifa, 1746 struct rt_addrinfo *info) 1747 { 1748 int len, error; 1749 1750 if ((error = rt_msg2(RTM_XNEWADDR, info, 0, w, &len))) 1751 return error; 1752 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1753 struct ifa_xmsghdr *ifam; 1754 1755 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1756 ifam->ifam_index = ifa->ifa_ifp->if_index; 1757 ifam->ifam_flags = ifa->ifa_flags; 1758 ifam->ifam_metric = ifa->ifa_metric; 1759 ifam->ifam_addrs = info->rti_addrs; 1760 #ifndef COMPAT_RTSOCK 1761 ifam->ifam_pid = 0; 1762 ifam->ifam_addrflags = if_addrflags(ifa); 1763 #endif 1764 if ((error = copyout(w->w_tmem, w->w_where, len)) == 0) 1765 w->w_where = (char *)w->w_where + len; 1766 } 1767 return error; 1768 } 1769 1770 static int 1771 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1772 { 1773 struct ifnet *ifp; 1774 struct ifaddr *ifa; 1775 struct rt_addrinfo info; 1776 int cmd, len, error = 0; 1777 int (*iflist_if)(struct ifnet *, struct rt_walkarg *, 1778 struct rt_addrinfo *, size_t); 1779 int (*iflist_addr)(struct rt_walkarg *, struct ifaddr *, 1780 struct rt_addrinfo *); 1781 int s; 1782 struct psref psref; 1783 int bound; 1784 1785 switch (type) { 1786 case NET_RT_IFLIST: 1787 cmd = RTM_IFINFO; 1788 iflist_if = sysctl_iflist_if; 1789 iflist_addr = sysctl_iflist_addr; 1790 break; 1791 #ifdef COMPAT_14 1792 case NET_RT_OOOIFLIST: 1793 cmd = RTM_OOIFINFO; 1794 iflist_if = compat_14_iflist; 1795 iflist_addr = compat_70_iflist_addr; 1796 break; 1797 #endif 1798 #ifdef COMPAT_50 1799 case NET_RT_OOIFLIST: 1800 cmd = RTM_OIFINFO; 1801 iflist_if = compat_50_iflist; 1802 iflist_addr = compat_70_iflist_addr; 1803 break; 1804 #endif 1805 #ifdef COMPAT_70 1806 case NET_RT_OIFLIST: 1807 cmd = RTM_IFINFO; 1808 iflist_if = sysctl_iflist_if; 1809 iflist_addr = compat_70_iflist_addr; 1810 break; 1811 #endif 1812 default: 1813 #ifdef RTSOCK_DEBUG 1814 printf("%s: unsupported IFLIST type %d\n", __func__, type); 1815 #endif 1816 return EINVAL; 1817 } 1818 1819 memset(&info, 0, sizeof(info)); 1820 1821 bound = curlwp_bind(); 1822 s = pserialize_read_enter(); 1823 IFNET_READER_FOREACH(ifp) { 1824 int _s; 1825 if (w->w_arg && w->w_arg != ifp->if_index) 1826 continue; 1827 if (IFADDR_READER_EMPTY(ifp)) 1828 continue; 1829 1830 if_acquire(ifp, &psref); 1831 pserialize_read_exit(s); 1832 1833 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1834 if ((error = rt_msg2(cmd, &info, NULL, w, &len)) != 0) 1835 goto release_exit; 1836 info.rti_info[RTAX_IFP] = NULL; 1837 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1838 if ((error = iflist_if(ifp, w, &info, len)) != 0) 1839 goto release_exit; 1840 } 1841 _s = pserialize_read_enter(); 1842 IFADDR_READER_FOREACH(ifa, ifp) { 1843 struct psref _psref; 1844 if (af && af != ifa->ifa_addr->sa_family) 1845 continue; 1846 ifa_acquire(ifa, &_psref); 1847 pserialize_read_exit(_s); 1848 1849 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1850 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1851 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1852 error = iflist_addr(w, ifa, &info); 1853 1854 _s = pserialize_read_enter(); 1855 ifa_release(ifa, &_psref); 1856 if (error != 0) { 1857 pserialize_read_exit(_s); 1858 goto release_exit; 1859 } 1860 } 1861 pserialize_read_exit(_s); 1862 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1863 info.rti_info[RTAX_BRD] = NULL; 1864 1865 s = pserialize_read_enter(); 1866 if_release(ifp, &psref); 1867 } 1868 pserialize_read_exit(s); 1869 curlwp_bindx(bound); 1870 1871 return 0; 1872 1873 release_exit: 1874 if_release(ifp, &psref); 1875 curlwp_bindx(bound); 1876 return error; 1877 } 1878 1879 static int 1880 sysctl_rtable(SYSCTLFN_ARGS) 1881 { 1882 void *where = oldp; 1883 size_t *given = oldlenp; 1884 int i, s, error = EINVAL; 1885 u_char af; 1886 struct rt_walkarg w; 1887 1888 if (namelen == 1 && name[0] == CTL_QUERY) 1889 return sysctl_query(SYSCTLFN_CALL(rnode)); 1890 1891 if (newp) 1892 return EPERM; 1893 if (namelen != 3) 1894 return EINVAL; 1895 af = name[0]; 1896 w.w_tmemneeded = 0; 1897 w.w_tmemsize = 0; 1898 w.w_tmem = NULL; 1899 again: 1900 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1901 if (w.w_tmemneeded) { 1902 w.w_tmem = kmem_alloc(w.w_tmemneeded, KM_SLEEP); 1903 w.w_tmemsize = w.w_tmemneeded; 1904 w.w_tmemneeded = 0; 1905 } 1906 w.w_op = name[1]; 1907 w.w_arg = name[2]; 1908 w.w_given = *given; 1909 w.w_needed = 0 - w.w_given; 1910 w.w_where = where; 1911 1912 s = splsoftnet(); 1913 switch (w.w_op) { 1914 1915 case NET_RT_DUMP: 1916 case NET_RT_FLAGS: 1917 #ifdef INET 1918 /* 1919 * take care of llinfo entries, the caller must 1920 * specify an AF 1921 */ 1922 if (w.w_op == NET_RT_FLAGS && 1923 (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { 1924 if (af != 0) 1925 error = lltable_sysctl_dumparp(af, &w); 1926 else 1927 error = EINVAL; 1928 break; 1929 } 1930 #endif /* INET */ 1931 1932 for (i = 1; i <= AF_MAX; i++) 1933 if ((af == 0 || af == i) && 1934 (error = rt_walktree(i, sysctl_dumpentry, &w))) 1935 break; 1936 break; 1937 1938 #ifdef COMPAT_14 1939 case NET_RT_OOOIFLIST: 1940 error = sysctl_iflist(af, &w, w.w_op); 1941 break; 1942 #endif 1943 #ifdef COMPAT_50 1944 case NET_RT_OOIFLIST: 1945 error = sysctl_iflist(af, &w, w.w_op); 1946 break; 1947 #endif 1948 #ifdef COMPAT_70 1949 case NET_RT_OIFLIST: 1950 error = sysctl_iflist(af, &w, w.w_op); 1951 break; 1952 #endif 1953 case NET_RT_IFLIST: 1954 error = sysctl_iflist(af, &w, w.w_op); 1955 break; 1956 } 1957 splx(s); 1958 1959 /* check to see if we couldn't allocate memory with NOWAIT */ 1960 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1961 goto again; 1962 1963 if (w.w_tmem) 1964 kmem_free(w.w_tmem, w.w_tmemsize); 1965 w.w_needed += w.w_given; 1966 if (where) { 1967 *given = (char *)w.w_where - (char *)where; 1968 if (*given < w.w_needed) 1969 return ENOMEM; 1970 } else { 1971 *given = (11 * w.w_needed) / 10; 1972 } 1973 return error; 1974 } 1975 1976 /* 1977 * Routing message software interrupt routine 1978 */ 1979 static void 1980 COMPATNAME(route_intr)(void *cookie) 1981 { 1982 struct sockproto proto = { .sp_family = PF_XROUTE, }; 1983 struct route_info * const ri = &COMPATNAME(route_info); 1984 struct mbuf *m; 1985 1986 mutex_enter(softnet_lock); 1987 KERNEL_LOCK(1, NULL); 1988 for (;;) { 1989 IFQ_LOCK(&ri->ri_intrq); 1990 IF_DEQUEUE(&ri->ri_intrq, m); 1991 IFQ_UNLOCK(&ri->ri_intrq); 1992 if (m == NULL) 1993 break; 1994 proto.sp_protocol = M_GETCTX(m, uintptr_t); 1995 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); 1996 } 1997 KERNEL_UNLOCK_ONE(NULL); 1998 mutex_exit(softnet_lock); 1999 } 2000 2001 /* 2002 * Enqueue a message to the software interrupt routine. 2003 */ 2004 void 2005 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 2006 { 2007 struct route_info * const ri = &COMPATNAME(route_info); 2008 int wasempty; 2009 2010 IFQ_LOCK(&ri->ri_intrq); 2011 if (IF_QFULL(&ri->ri_intrq)) { 2012 IF_DROP(&ri->ri_intrq); 2013 IFQ_UNLOCK(&ri->ri_intrq); 2014 m_freem(m); 2015 } else { 2016 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 2017 M_SETCTX(m, (uintptr_t)family); 2018 IF_ENQUEUE(&ri->ri_intrq, m); 2019 IFQ_UNLOCK(&ri->ri_intrq); 2020 if (wasempty) { 2021 kpreempt_disable(); 2022 softint_schedule(ri->ri_sih); 2023 kpreempt_enable(); 2024 } 2025 } 2026 } 2027 2028 static void 2029 COMPATNAME(route_init)(void) 2030 { 2031 struct route_info * const ri = &COMPATNAME(route_info); 2032 2033 #ifndef COMPAT_RTSOCK 2034 rt_init(); 2035 #endif 2036 2037 sysctl_net_route_setup(NULL); 2038 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 2039 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 2040 COMPATNAME(route_intr), NULL); 2041 IFQ_LOCK_INIT(&ri->ri_intrq); 2042 } 2043 2044 /* 2045 * Definitions of protocols supported in the ROUTE domain. 2046 */ 2047 #ifndef COMPAT_RTSOCK 2048 PR_WRAP_USRREQS(route); 2049 #else 2050 PR_WRAP_USRREQS(compat_50_route); 2051 #endif 2052 2053 static const struct pr_usrreqs route_usrreqs = { 2054 .pr_attach = COMPATNAME(route_attach_wrapper), 2055 .pr_detach = COMPATNAME(route_detach_wrapper), 2056 .pr_accept = COMPATNAME(route_accept_wrapper), 2057 .pr_bind = COMPATNAME(route_bind_wrapper), 2058 .pr_listen = COMPATNAME(route_listen_wrapper), 2059 .pr_connect = COMPATNAME(route_connect_wrapper), 2060 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 2061 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 2062 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 2063 .pr_abort = COMPATNAME(route_abort_wrapper), 2064 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 2065 .pr_stat = COMPATNAME(route_stat_wrapper), 2066 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 2067 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 2068 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 2069 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 2070 .pr_send = COMPATNAME(route_send_wrapper), 2071 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 2072 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 2073 }; 2074 2075 static const struct protosw COMPATNAME(route_protosw)[] = { 2076 { 2077 .pr_type = SOCK_RAW, 2078 .pr_domain = &COMPATNAME(routedomain), 2079 .pr_flags = PR_ATOMIC|PR_ADDR, 2080 .pr_input = raw_input, 2081 .pr_ctlinput = raw_ctlinput, 2082 .pr_ctloutput = route_ctloutput, 2083 .pr_usrreqs = &route_usrreqs, 2084 .pr_init = raw_init, 2085 }, 2086 }; 2087 2088 struct domain COMPATNAME(routedomain) = { 2089 .dom_family = PF_XROUTE, 2090 .dom_name = DOMAINNAME, 2091 .dom_init = COMPATNAME(route_init), 2092 .dom_protosw = COMPATNAME(route_protosw), 2093 .dom_protoswNPROTOSW = 2094 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 2095 }; 2096 2097 static void 2098 sysctl_net_route_setup(struct sysctllog **clog) 2099 { 2100 const struct sysctlnode *rnode = NULL; 2101 2102 sysctl_createv(clog, 0, NULL, &rnode, 2103 CTLFLAG_PERMANENT, 2104 CTLTYPE_NODE, DOMAINNAME, 2105 SYSCTL_DESCR("PF_ROUTE information"), 2106 NULL, 0, NULL, 0, 2107 CTL_NET, PF_XROUTE, CTL_EOL); 2108 2109 sysctl_createv(clog, 0, NULL, NULL, 2110 CTLFLAG_PERMANENT, 2111 CTLTYPE_NODE, "rtable", 2112 SYSCTL_DESCR("Routing table information"), 2113 sysctl_rtable, 0, NULL, 0, 2114 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 2115 2116 sysctl_createv(clog, 0, &rnode, NULL, 2117 CTLFLAG_PERMANENT, 2118 CTLTYPE_STRUCT, "stats", 2119 SYSCTL_DESCR("Routing statistics"), 2120 NULL, 0, &rtstat, sizeof(rtstat), 2121 CTL_CREATE, CTL_EOL); 2122 } 2123
Indexes created Wed Sep 24 05:09:52 GMT 2025