rtsock.c revision 1.220
1 /* $NetBSD: rtsock.c,v 1.220 2017/06/26 03:13:40 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 1.220 2017/06/26 03:13:40 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 #else 716 (void)ifp_changed; /* XXX gcc */ 717 #endif 718 out: 719 if_put(ifp, &psref_ifp); 720 721 return error; 722 } 723 724 /*ARGSUSED*/ 725 int 726 COMPATNAME(route_output)(struct mbuf *m, struct socket *so) 727 { 728 struct sockproto proto = { .sp_family = PF_XROUTE, }; 729 struct rt_xmsghdr *rtm = NULL; 730 struct rt_xmsghdr *old_rtm = NULL, *new_rtm = NULL; 731 struct rtentry *rt = NULL; 732 struct rtentry *saved_nrt = NULL; 733 struct rt_addrinfo info; 734 int len, error = 0; 735 sa_family_t family; 736 struct sockaddr_dl sdl; 737 int bound = curlwp_bind(); 738 bool do_rt_free = false; 739 740 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 741 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 742 (m = m_pullup(m, sizeof(int32_t))) == NULL)) { 743 error = ENOBUFS; 744 goto out; 745 } 746 if ((m->m_flags & M_PKTHDR) == 0) 747 panic("%s", __func__); 748 len = m->m_pkthdr.len; 749 if (len < sizeof(*rtm) || 750 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 751 info.rti_info[RTAX_DST] = NULL; 752 senderr(EINVAL); 753 } 754 R_Malloc(rtm, struct rt_xmsghdr *, len); 755 if (rtm == NULL) { 756 info.rti_info[RTAX_DST] = NULL; 757 senderr(ENOBUFS); 758 } 759 m_copydata(m, 0, len, rtm); 760 if (rtm->rtm_version != RTM_XVERSION) { 761 info.rti_info[RTAX_DST] = NULL; 762 senderr(EPROTONOSUPPORT); 763 } 764 rtm->rtm_pid = curproc->p_pid; 765 memset(&info, 0, sizeof(info)); 766 info.rti_addrs = rtm->rtm_addrs; 767 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 768 &info)) { 769 senderr(EINVAL); 770 } 771 info.rti_flags = rtm->rtm_flags; 772 #ifdef RTSOCK_DEBUG 773 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 774 char abuf[INET_ADDRSTRLEN]; 775 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 776 RT_IN_PRINT(&info, abuf, RTAX_DST)); 777 } 778 #endif /* RTSOCK_DEBUG */ 779 if (info.rti_info[RTAX_DST] == NULL || 780 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 781 senderr(EINVAL); 782 } 783 if (info.rti_info[RTAX_GATEWAY] != NULL && 784 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 785 senderr(EINVAL); 786 } 787 788 /* 789 * Verify that the caller has the appropriate privilege; RTM_GET 790 * is the only operation the non-superuser is allowed. 791 */ 792 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 793 0, rtm, NULL, NULL) != 0) 794 senderr(EACCES); 795 796 switch (rtm->rtm_type) { 797 798 case RTM_ADD: 799 if (info.rti_info[RTAX_GATEWAY] == NULL) { 800 senderr(EINVAL); 801 } 802 #ifdef INET 803 /* support for new ARP code with keeping backcompat */ 804 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { 805 const struct sockaddr_dl *sdlp = 806 satocsdl(info.rti_info[RTAX_GATEWAY]); 807 808 /* Allow routing requests by interface index */ 809 if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 810 && sdlp->sdl_slen == 0) 811 goto fallback; 812 /* 813 * Old arp binaries don't set the sdl_index 814 * so we have to complement it. 815 */ 816 int sdl_index = sdlp->sdl_index; 817 if (sdl_index == 0) { 818 error = route_get_sdl_index(&info, &sdl_index); 819 if (error != 0) 820 goto fallback; 821 } else if ( 822 info.rti_info[RTAX_DST]->sa_family == AF_INET) { 823 /* 824 * XXX workaround for SIN_PROXY case; proxy arp 825 * entry should be in an interface that has 826 * a network route including the destination, 827 * not a local (link) route that may not be a 828 * desired place, for example a tap. 829 */ 830 const struct sockaddr_inarp *sina = 831 (const struct sockaddr_inarp *) 832 info.rti_info[RTAX_DST]; 833 if (sina->sin_other & SIN_PROXY) { 834 error = route_get_sdl_index(&info, 835 &sdl_index); 836 if (error != 0) 837 goto fallback; 838 } 839 } 840 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 841 rtm->rtm_rmx.rmx_expire, &info, sdl_index); 842 break; 843 } 844 fallback: 845 #endif /* INET */ 846 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 847 if (error == 0) { 848 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 849 rt_unref(saved_nrt); 850 } 851 break; 852 853 case RTM_DELETE: 854 #ifdef INET 855 /* support for new ARP code */ 856 if (info.rti_info[RTAX_GATEWAY] && 857 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 858 (rtm->rtm_flags & RTF_LLDATA) != 0) { 859 const struct sockaddr_dl *sdlp = 860 satocsdl(info.rti_info[RTAX_GATEWAY]); 861 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 862 rtm->rtm_rmx.rmx_expire, &info, sdlp->sdl_index); 863 break; 864 } 865 #endif /* INET */ 866 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 867 if (error != 0) 868 break; 869 870 rt = saved_nrt; 871 do_rt_free = true; 872 info.rti_info[RTAX_DST] = rt_getkey(rt); 873 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 874 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 875 info.rti_info[RTAX_TAG] = rt_gettag(rt); 876 error = route_output_report(rt, &info, rtm, &new_rtm); 877 if (error) 878 senderr(error); 879 if (new_rtm != NULL) { 880 old_rtm = rtm; 881 rtm = new_rtm; 882 } 883 break; 884 885 case RTM_GET: 886 case RTM_CHANGE: 887 case RTM_LOCK: 888 /* XXX This will mask info.rti_info[RTAX_DST] with 889 * info.rti_info[RTAX_NETMASK] before 890 * searching. It did not used to do that. --dyoung 891 */ 892 rt = NULL; 893 error = rtrequest1(RTM_GET, &info, &rt); 894 if (error != 0) 895 senderr(error); 896 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 897 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 898 info.rti_info[RTAX_DST]->sa_len) != 0) 899 senderr(ESRCH); 900 if (info.rti_info[RTAX_NETMASK] == NULL && 901 rt_mask(rt) != NULL) 902 senderr(ETOOMANYREFS); 903 } 904 905 /* 906 * XXX if arp/ndp requests an L2 entry, we have to obtain 907 * it from lltable while for the route command we have to 908 * return a route as it is. How to distinguish them? 909 * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp 910 * indicates an L2 entry is requested. For old arp/ndp 911 * binaries, we check RTF_UP flag is NOT set; it works 912 * by the fact that arp/ndp don't set it while the route 913 * command sets it. 914 */ 915 if (((rtm->rtm_flags & RTF_LLDATA) != 0 || 916 (rtm->rtm_flags & RTF_UP) == 0) && 917 rtm->rtm_type == RTM_GET && 918 sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { 919 int ll_flags = 0; 920 route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, 921 &ll_flags); 922 info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); 923 error = route_output_report(rt, &info, rtm, &new_rtm); 924 if (error) 925 senderr(error); 926 if (new_rtm != NULL) { 927 old_rtm = rtm; 928 rtm = new_rtm; 929 } 930 rtm->rtm_flags |= RTF_LLDATA; 931 rtm->rtm_flags &= ~RTF_CONNECTED; 932 rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; 933 break; 934 } 935 936 switch (rtm->rtm_type) { 937 case RTM_GET: 938 info.rti_info[RTAX_DST] = rt_getkey(rt); 939 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 940 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 941 info.rti_info[RTAX_TAG] = rt_gettag(rt); 942 error = route_output_report(rt, &info, rtm, &new_rtm); 943 if (error) 944 senderr(error); 945 if (new_rtm != NULL) { 946 old_rtm = rtm; 947 rtm = new_rtm; 948 } 949 break; 950 951 case RTM_CHANGE: 952 #ifdef NET_MPSAFE 953 error = rt_update_prepare(rt); 954 if (error == 0) { 955 error = route_output_change(rt, &info, rtm); 956 rt_update_finish(rt); 957 } 958 #else 959 error = route_output_change(rt, &info, rtm); 960 #endif 961 if (error != 0) 962 goto flush; 963 /*FALLTHROUGH*/ 964 case RTM_LOCK: 965 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 966 rt->rt_rmx.rmx_locks |= 967 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 968 break; 969 } 970 break; 971 972 default: 973 senderr(EOPNOTSUPP); 974 } 975 976 flush: 977 if (rtm) { 978 if (error) 979 rtm->rtm_errno = error; 980 else 981 rtm->rtm_flags |= RTF_DONE; 982 } 983 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 984 0; 985 /* We cannot free old_rtm until we have stopped using the 986 * pointers in info, some of which may point to sockaddrs 987 * in old_rtm. 988 */ 989 if (old_rtm != NULL) 990 Free(old_rtm); 991 if (rt) { 992 if (do_rt_free) 993 rt_free(rt); 994 else 995 rt_unref(rt); 996 } 997 { 998 struct rawcb *rp = NULL; 999 /* 1000 * Check to see if we don't want our own messages. 1001 */ 1002 if ((so->so_options & SO_USELOOPBACK) == 0) { 1003 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 1004 if (rtm) 1005 Free(rtm); 1006 m_freem(m); 1007 goto out; 1008 } 1009 /* There is another listener, so construct message */ 1010 rp = sotorawcb(so); 1011 } 1012 if (rtm) { 1013 m_copyback(m, 0, rtm->rtm_msglen, rtm); 1014 if (m->m_pkthdr.len < rtm->rtm_msglen) { 1015 m_freem(m); 1016 m = NULL; 1017 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 1018 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 1019 Free(rtm); 1020 } 1021 if (rp) 1022 rp->rcb_proto.sp_family = 0; /* Avoid us */ 1023 if (family) 1024 proto.sp_protocol = family; 1025 if (m) 1026 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 1027 &COMPATNAME(route_info).ri_dst); 1028 if (rp) 1029 rp->rcb_proto.sp_family = PF_XROUTE; 1030 } 1031 out: 1032 curlwp_bindx(bound); 1033 return error; 1034 } 1035 1036 static int 1037 route_ctloutput(int op, struct socket *so, struct sockopt *sopt) 1038 { 1039 struct routecb *rop = sotoroutecb(so); 1040 int error = 0; 1041 unsigned char *rtm_type; 1042 size_t len; 1043 unsigned int msgfilter; 1044 1045 KASSERT(solocked(so)); 1046 1047 if (sopt->sopt_level != AF_ROUTE) { 1048 error = ENOPROTOOPT; 1049 } else switch (op) { 1050 case PRCO_SETOPT: 1051 switch (sopt->sopt_name) { 1052 case RO_MSGFILTER: 1053 msgfilter = 0; 1054 for (rtm_type = sopt->sopt_data, len = sopt->sopt_size; 1055 len != 0; 1056 rtm_type++, len -= sizeof(*rtm_type)) 1057 { 1058 /* Guard against overflowing our storage. */ 1059 if (*rtm_type >= sizeof(msgfilter) * CHAR_BIT) { 1060 error = EOVERFLOW; 1061 break; 1062 } 1063 msgfilter |= RTMSGFILTER(*rtm_type); 1064 } 1065 if (error == 0) 1066 rop->rocb_msgfilter = msgfilter; 1067 break; 1068 default: 1069 error = ENOPROTOOPT; 1070 break; 1071 } 1072 break; 1073 case PRCO_GETOPT: 1074 switch (sopt->sopt_name) { 1075 case RO_MSGFILTER: 1076 error = ENOTSUP; 1077 break; 1078 default: 1079 error = ENOPROTOOPT; 1080 break; 1081 } 1082 } 1083 return error; 1084 } 1085 1086 static void 1087 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 1088 { 1089 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 1090 metric(RTV_RPIPE, rmx_recvpipe); 1091 metric(RTV_SPIPE, rmx_sendpipe); 1092 metric(RTV_SSTHRESH, rmx_ssthresh); 1093 metric(RTV_RTT, rmx_rtt); 1094 metric(RTV_RTTVAR, rmx_rttvar); 1095 metric(RTV_HOPCOUNT, rmx_hopcount); 1096 metric(RTV_MTU, rmx_mtu); 1097 #undef metric 1098 if (which & RTV_EXPIRE) { 1099 out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? 1100 time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; 1101 } 1102 } 1103 1104 static void 1105 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 1106 { 1107 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 1108 metric(rmx_recvpipe); 1109 metric(rmx_sendpipe); 1110 metric(rmx_ssthresh); 1111 metric(rmx_rtt); 1112 metric(rmx_rttvar); 1113 metric(rmx_hopcount); 1114 metric(rmx_mtu); 1115 metric(rmx_locks); 1116 #undef metric 1117 out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? 1118 time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; 1119 } 1120 1121 static int 1122 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 1123 struct rt_addrinfo *rtinfo) 1124 { 1125 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 1126 int i; 1127 1128 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 1129 if ((rtinfo->rti_addrs & (1 << i)) == 0) 1130 continue; 1131 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 1132 RT_XADVANCE(cp, sa); 1133 } 1134 1135 /* 1136 * Check for extra addresses specified, except RTM_GET asking 1137 * for interface info. 1138 */ 1139 if (rtmtype == RTM_GET) { 1140 if (((rtinfo->rti_addrs & 1141 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0U << i)) != 0) 1142 return 1; 1143 } else if ((rtinfo->rti_addrs & (~0U << i)) != 0) 1144 return 1; 1145 /* Check for bad data length. */ 1146 if (cp != cplim) { 1147 if (i == RTAX_NETMASK + 1 && sa != NULL && 1148 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 1149 /* 1150 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 1151 * We accept this for now for the sake of old 1152 * binaries or third party softwares. 1153 */ 1154 ; 1155 else 1156 return 1; 1157 } 1158 return 0; 1159 } 1160 1161 static int 1162 rt_getlen(int type) 1163 { 1164 #ifndef COMPAT_RTSOCK 1165 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 1166 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 1167 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 1168 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 1169 #endif 1170 1171 switch (type) { 1172 case RTM_ODELADDR: 1173 case RTM_ONEWADDR: 1174 case RTM_OCHGADDR: 1175 #ifdef COMPAT_70 1176 return sizeof(struct ifa_msghdr70); 1177 #else 1178 #ifdef RTSOCK_DEBUG 1179 printf("%s: unsupported RTM type %d\n", __func__, type); 1180 #endif 1181 return -1; 1182 #endif 1183 case RTM_DELADDR: 1184 case RTM_NEWADDR: 1185 case RTM_CHGADDR: 1186 return sizeof(struct ifa_xmsghdr); 1187 1188 case RTM_OOIFINFO: 1189 #ifdef COMPAT_14 1190 return sizeof(struct if_msghdr14); 1191 #else 1192 #ifdef RTSOCK_DEBUG 1193 printf("%s: unsupported RTM type RTM_OOIFINFO\n", __func__); 1194 #endif 1195 return -1; 1196 #endif 1197 case RTM_OIFINFO: 1198 #ifdef COMPAT_50 1199 return sizeof(struct if_msghdr50); 1200 #else 1201 #ifdef RTSOCK_DEBUG 1202 printf("%s: unsupported RTM type RTM_OIFINFO\n", __func__); 1203 #endif 1204 return -1; 1205 #endif 1206 1207 case RTM_IFINFO: 1208 return sizeof(struct if_xmsghdr); 1209 1210 case RTM_IFANNOUNCE: 1211 case RTM_IEEE80211: 1212 return sizeof(struct if_xannouncemsghdr); 1213 1214 default: 1215 return sizeof(struct rt_xmsghdr); 1216 } 1217 } 1218 1219 1220 struct mbuf * 1221 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 1222 { 1223 struct rt_xmsghdr *rtm; 1224 struct mbuf *m; 1225 int i; 1226 const struct sockaddr *sa; 1227 int len, dlen; 1228 1229 m = m_gethdr(M_DONTWAIT, MT_DATA); 1230 if (m == NULL) 1231 return m; 1232 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 1233 1234 if ((len = rt_getlen(type)) == -1) 1235 goto out; 1236 if (len > MHLEN + MLEN) 1237 panic("%s: message too long", __func__); 1238 else if (len > MHLEN) { 1239 m->m_next = m_get(M_DONTWAIT, MT_DATA); 1240 if (m->m_next == NULL) 1241 goto out; 1242 MCLAIM(m->m_next, m->m_owner); 1243 m->m_pkthdr.len = len; 1244 m->m_len = MHLEN; 1245 m->m_next->m_len = len - MHLEN; 1246 } else { 1247 m->m_pkthdr.len = m->m_len = len; 1248 } 1249 m_reset_rcvif(m); 1250 m_copyback(m, 0, datalen, data); 1251 if (len > datalen) 1252 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 1253 rtm = mtod(m, struct rt_xmsghdr *); 1254 for (i = 0; i < RTAX_MAX; i++) { 1255 if ((sa = rtinfo->rti_info[i]) == NULL) 1256 continue; 1257 rtinfo->rti_addrs |= (1 << i); 1258 dlen = RT_XROUNDUP(sa->sa_len); 1259 m_copyback(m, len, sa->sa_len, sa); 1260 if (dlen != sa->sa_len) { 1261 /* 1262 * Up to 6 + 1 nul's since roundup is to 1263 * sizeof(uint64_t) (8 bytes) 1264 */ 1265 m_copyback(m, len + sa->sa_len, 1266 dlen - sa->sa_len, "\0\0\0\0\0\0"); 1267 } 1268 len += dlen; 1269 } 1270 if (m->m_pkthdr.len != len) 1271 goto out; 1272 rtm->rtm_msglen = len; 1273 rtm->rtm_version = RTM_XVERSION; 1274 rtm->rtm_type = type; 1275 return m; 1276 out: 1277 m_freem(m); 1278 return NULL; 1279 } 1280 1281 /* 1282 * rt_msg2 1283 * 1284 * fills 'cp' or 'w'.w_tmem with the routing socket message and 1285 * returns the length of the message in 'lenp'. 1286 * 1287 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 1288 * the message 1289 * otherwise walkarg's w_needed is updated and if the user buffer is 1290 * specified and w_needed indicates space exists the information is copied 1291 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 1292 * if the allocation fails ENOBUFS is returned. 1293 */ 1294 static int 1295 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1296 int *lenp) 1297 { 1298 int i; 1299 int len, dlen, second_time = 0; 1300 char *cp0, *cp = cpv; 1301 1302 rtinfo->rti_addrs = 0; 1303 again: 1304 if ((len = rt_getlen(type)) == -1) 1305 return EINVAL; 1306 1307 if ((cp0 = cp) != NULL) 1308 cp += len; 1309 for (i = 0; i < RTAX_MAX; i++) { 1310 const struct sockaddr *sa; 1311 1312 if ((sa = rtinfo->rti_info[i]) == NULL) 1313 continue; 1314 rtinfo->rti_addrs |= (1 << i); 1315 dlen = RT_XROUNDUP(sa->sa_len); 1316 if (cp) { 1317 int diff = dlen - sa->sa_len; 1318 (void)memcpy(cp, sa, (size_t)sa->sa_len); 1319 cp += sa->sa_len; 1320 if (diff > 0) { 1321 (void)memset(cp, 0, (size_t)diff); 1322 cp += diff; 1323 } 1324 } 1325 len += dlen; 1326 } 1327 if (cp == NULL && w != NULL && !second_time) { 1328 struct rt_walkarg *rw = w; 1329 1330 rw->w_needed += len; 1331 if (rw->w_needed <= 0 && rw->w_where) { 1332 if (rw->w_tmemsize < len) { 1333 if (rw->w_tmem) 1334 kmem_free(rw->w_tmem, rw->w_tmemsize); 1335 rw->w_tmem = kmem_alloc(len, KM_SLEEP); 1336 rw->w_tmemsize = len; 1337 } 1338 if (rw->w_tmem) { 1339 cp = rw->w_tmem; 1340 second_time = 1; 1341 goto again; 1342 } else { 1343 rw->w_tmemneeded = len; 1344 return ENOBUFS; 1345 } 1346 } 1347 } 1348 if (cp) { 1349 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 1350 1351 rtm->rtm_version = RTM_XVERSION; 1352 rtm->rtm_type = type; 1353 rtm->rtm_msglen = len; 1354 } 1355 if (lenp) 1356 *lenp = len; 1357 return 0; 1358 } 1359 1360 #ifndef COMPAT_RTSOCK 1361 int 1362 rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1363 int *lenp) 1364 { 1365 return rt_msg2(type, rtinfo, cpv, w, lenp); 1366 } 1367 #endif 1368 1369 /* 1370 * This routine is called to generate a message from the routing 1371 * socket indicating that a redirect has occurred, a routing lookup 1372 * has failed, or that a protocol has detected timeouts to a particular 1373 * destination. 1374 */ 1375 void 1376 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 1377 int error) 1378 { 1379 struct rt_xmsghdr rtm; 1380 struct mbuf *m; 1381 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1382 struct rt_addrinfo info = *rtinfo; 1383 1384 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 1385 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1386 return; 1387 memset(&rtm, 0, sizeof(rtm)); 1388 rtm.rtm_pid = curproc->p_pid; 1389 rtm.rtm_flags = RTF_DONE | flags; 1390 rtm.rtm_errno = error; 1391 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 1392 if (m == NULL) 1393 return; 1394 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1395 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1396 } 1397 1398 /* 1399 * This routine is called to generate a message from the routing 1400 * socket indicating that the status of a network interface has changed. 1401 */ 1402 void 1403 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1404 { 1405 struct if_xmsghdr ifm; 1406 struct mbuf *m; 1407 struct rt_addrinfo info; 1408 1409 COMPATCALL(rt_ifmsg, (ifp)); 1410 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1411 return; 1412 (void)memset(&info, 0, sizeof(info)); 1413 (void)memset(&ifm, 0, sizeof(ifm)); 1414 ifm.ifm_index = ifp->if_index; 1415 ifm.ifm_flags = ifp->if_flags; 1416 ifm.ifm_data = ifp->if_data; 1417 ifm.ifm_addrs = 0; 1418 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1419 if (m == NULL) 1420 return; 1421 COMPATNAME(route_enqueue)(m, 0); 1422 #ifdef COMPAT_14 1423 compat_14_rt_oifmsg(ifp); 1424 #endif 1425 #ifdef COMPAT_50 1426 compat_50_rt_oifmsg(ifp); 1427 #endif 1428 } 1429 1430 #ifndef COMPAT_RTSOCK 1431 static int 1432 if_addrflags(struct ifaddr *ifa) 1433 { 1434 1435 switch (ifa->ifa_addr->sa_family) { 1436 #ifdef INET 1437 case AF_INET: 1438 return ((struct in_ifaddr *)ifa)->ia4_flags; 1439 #endif 1440 #ifdef INET6 1441 case AF_INET6: 1442 return ((struct in6_ifaddr *)ifa)->ia6_flags; 1443 #endif 1444 default: 1445 return 0; 1446 } 1447 } 1448 #endif 1449 1450 /* 1451 * This is called to generate messages from the routing socket 1452 * indicating a network interface has had addresses associated with it. 1453 * if we ever reverse the logic and replace messages TO the routing 1454 * socket indicate a request to configure interfaces, then it will 1455 * be unnecessary as the routing socket will automatically generate 1456 * copies of it. 1457 */ 1458 void 1459 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1460 struct rtentry *rt) 1461 { 1462 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1463 struct rt_addrinfo info; 1464 const struct sockaddr *sa; 1465 int pass; 1466 struct mbuf *m; 1467 struct ifnet *ifp; 1468 struct rt_xmsghdr rtm; 1469 struct ifa_xmsghdr ifam; 1470 int ncmd; 1471 1472 KASSERT(ifa != NULL); 1473 KASSERT(ifa->ifa_addr != NULL); 1474 ifp = ifa->ifa_ifp; 1475 #ifdef SCTP 1476 if (cmd == RTM_ADD) { 1477 sctp_add_ip_address(ifa); 1478 } else if (cmd == RTM_DELETE) { 1479 sctp_delete_ip_address(ifa); 1480 } 1481 #endif 1482 1483 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1484 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1485 return; 1486 for (pass = 1; pass < 3; pass++) { 1487 memset(&info, 0, sizeof(info)); 1488 switch (cmdpass(cmd, pass)) { 1489 case cmdpass(RTM_ADD, 1): 1490 case cmdpass(RTM_CHANGE, 1): 1491 case cmdpass(RTM_DELETE, 2): 1492 case cmdpass(RTM_NEWADDR, 1): 1493 case cmdpass(RTM_DELADDR, 1): 1494 case cmdpass(RTM_CHGADDR, 1): 1495 switch (cmd) { 1496 case RTM_ADD: 1497 ncmd = RTM_XNEWADDR; 1498 break; 1499 case RTM_DELETE: 1500 ncmd = RTM_XDELADDR; 1501 break; 1502 case RTM_CHANGE: 1503 ncmd = RTM_XCHGADDR; 1504 break; 1505 case RTM_NEWADDR: 1506 ncmd = RTM_XNEWADDR; 1507 break; 1508 case RTM_DELADDR: 1509 ncmd = RTM_XDELADDR; 1510 break; 1511 case RTM_CHGADDR: 1512 ncmd = RTM_XCHGADDR; 1513 break; 1514 default: 1515 panic("%s: unknown command %d", __func__, cmd); 1516 } 1517 #ifdef COMPAT_70 1518 compat_70_rt_newaddrmsg1(ncmd, ifa); 1519 #endif 1520 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1521 KASSERT(ifp->if_dl != NULL); 1522 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1523 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1524 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1525 memset(&ifam, 0, sizeof(ifam)); 1526 ifam.ifam_index = ifp->if_index; 1527 ifam.ifam_metric = ifa->ifa_metric; 1528 ifam.ifam_flags = ifa->ifa_flags; 1529 #ifndef COMPAT_RTSOCK 1530 ifam.ifam_pid = curproc->p_pid; 1531 ifam.ifam_addrflags = if_addrflags(ifa); 1532 #endif 1533 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1534 if (m == NULL) 1535 continue; 1536 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1537 info.rti_addrs; 1538 break; 1539 case cmdpass(RTM_ADD, 2): 1540 case cmdpass(RTM_CHANGE, 2): 1541 case cmdpass(RTM_DELETE, 1): 1542 if (rt == NULL) 1543 continue; 1544 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1545 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1546 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1547 memset(&rtm, 0, sizeof(rtm)); 1548 rtm.rtm_pid = curproc->p_pid; 1549 rtm.rtm_index = ifp->if_index; 1550 rtm.rtm_flags |= rt->rt_flags; 1551 rtm.rtm_errno = error; 1552 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1553 if (m == NULL) 1554 continue; 1555 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1556 break; 1557 default: 1558 continue; 1559 } 1560 KASSERTMSG(m != NULL, "called with wrong command"); 1561 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1562 } 1563 #undef cmdpass 1564 1565 } 1566 1567 static struct mbuf * 1568 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1569 struct rt_addrinfo *info) 1570 { 1571 struct if_xannouncemsghdr ifan; 1572 1573 memset(info, 0, sizeof(*info)); 1574 memset(&ifan, 0, sizeof(ifan)); 1575 ifan.ifan_index = ifp->if_index; 1576 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1577 ifan.ifan_what = what; 1578 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1579 } 1580 1581 /* 1582 * This is called to generate routing socket messages indicating 1583 * network interface arrival and departure. 1584 */ 1585 void 1586 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1587 { 1588 struct mbuf *m; 1589 struct rt_addrinfo info; 1590 1591 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1592 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1593 return; 1594 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1595 if (m == NULL) 1596 return; 1597 COMPATNAME(route_enqueue)(m, 0); 1598 } 1599 1600 /* 1601 * This is called to generate routing socket messages indicating 1602 * IEEE80211 wireless events. 1603 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1604 */ 1605 void 1606 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1607 size_t data_len) 1608 { 1609 struct mbuf *m; 1610 struct rt_addrinfo info; 1611 1612 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1613 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1614 return; 1615 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1616 if (m == NULL) 1617 return; 1618 /* 1619 * Append the ieee80211 data. Try to stick it in the 1620 * mbuf containing the ifannounce msg; otherwise allocate 1621 * a new mbuf and append. 1622 * 1623 * NB: we assume m is a single mbuf. 1624 */ 1625 if (data_len > M_TRAILINGSPACE(m)) { 1626 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1627 if (n == NULL) { 1628 m_freem(m); 1629 return; 1630 } 1631 (void)memcpy(mtod(n, void *), data, data_len); 1632 n->m_len = data_len; 1633 m->m_next = n; 1634 } else if (data_len > 0) { 1635 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1636 m->m_len += data_len; 1637 } 1638 if (m->m_flags & M_PKTHDR) 1639 m->m_pkthdr.len += data_len; 1640 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1641 COMPATNAME(route_enqueue)(m, 0); 1642 } 1643 1644 #ifndef COMPAT_RTSOCK 1645 /* 1646 * Send a routing message as mimicing that a cloned route is added. 1647 */ 1648 void 1649 rt_clonedmsg(const struct sockaddr *dst, const struct ifnet *ifp, 1650 const struct rtentry *rt) 1651 { 1652 struct rt_addrinfo info; 1653 /* Mimic flags exactly */ 1654 #define RTF_LLINFO 0x400 1655 #define RTF_CLONED 0x2000 1656 int flags = RTF_UP | RTF_HOST | RTF_DONE | RTF_LLINFO | RTF_CLONED; 1657 union { 1658 struct sockaddr sa; 1659 struct sockaddr_storage ss; 1660 struct sockaddr_dl sdl; 1661 } u; 1662 uint8_t namelen = strlen(ifp->if_xname); 1663 uint8_t addrlen = ifp->if_addrlen; 1664 1665 if (rt == NULL) 1666 return; /* XXX */ 1667 1668 memset(&info, 0, sizeof(info)); 1669 info.rti_info[RTAX_DST] = dst; 1670 sockaddr_dl_init(&u.sdl, sizeof(u.ss), ifp->if_index, ifp->if_type, 1671 NULL, namelen, NULL, addrlen); 1672 info.rti_info[RTAX_GATEWAY] = &u.sa; 1673 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1674 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; 1675 1676 rt_missmsg(RTM_ADD, &info, flags, 0); 1677 #undef RTF_LLINFO 1678 #undef RTF_CLONED 1679 } 1680 #endif /* COMPAT_RTSOCK */ 1681 1682 /* 1683 * This is used in dumping the kernel table via sysctl(). 1684 */ 1685 static int 1686 sysctl_dumpentry(struct rtentry *rt, void *v) 1687 { 1688 struct rt_walkarg *w = v; 1689 int error = 0, size; 1690 struct rt_addrinfo info; 1691 1692 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1693 return 0; 1694 memset(&info, 0, sizeof(info)); 1695 info.rti_info[RTAX_DST] = rt_getkey(rt); 1696 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1697 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1698 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1699 if (rt->rt_ifp) { 1700 const struct ifaddr *rtifa; 1701 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1702 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1703 * then rt_get_ifa() != NULL. So this ought to still be safe. 1704 * --dyoung 1705 */ 1706 rtifa = rt_get_ifa(rt); 1707 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1708 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1709 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1710 } 1711 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1712 return error; 1713 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1714 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1715 1716 rtm->rtm_flags = rt->rt_flags; 1717 rtm->rtm_use = rt->rt_use; 1718 rtm_setmetrics(rt, rtm); 1719 KASSERT(rt->rt_ifp != NULL); 1720 rtm->rtm_index = rt->rt_ifp->if_index; 1721 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1722 rtm->rtm_addrs = info.rti_addrs; 1723 if ((error = copyout(rtm, w->w_where, size)) != 0) 1724 w->w_where = NULL; 1725 else 1726 w->w_where = (char *)w->w_where + size; 1727 } 1728 return error; 1729 } 1730 1731 static int 1732 sysctl_iflist_if(struct ifnet *ifp, struct rt_walkarg *w, 1733 struct rt_addrinfo *info, size_t len) 1734 { 1735 struct if_xmsghdr *ifm; 1736 int error; 1737 1738 ifm = (struct if_xmsghdr *)w->w_tmem; 1739 ifm->ifm_index = ifp->if_index; 1740 ifm->ifm_flags = ifp->if_flags; 1741 ifm->ifm_data = ifp->if_data; 1742 ifm->ifm_addrs = info->rti_addrs; 1743 if ((error = copyout(ifm, w->w_where, len)) == 0) 1744 w->w_where = (char *)w->w_where + len; 1745 return error; 1746 } 1747 1748 static int 1749 sysctl_iflist_addr(struct rt_walkarg *w, struct ifaddr *ifa, 1750 struct rt_addrinfo *info) 1751 { 1752 int len, error; 1753 1754 if ((error = rt_msg2(RTM_XNEWADDR, info, 0, w, &len))) 1755 return error; 1756 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1757 struct ifa_xmsghdr *ifam; 1758 1759 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1760 ifam->ifam_index = ifa->ifa_ifp->if_index; 1761 ifam->ifam_flags = ifa->ifa_flags; 1762 ifam->ifam_metric = ifa->ifa_metric; 1763 ifam->ifam_addrs = info->rti_addrs; 1764 #ifndef COMPAT_RTSOCK 1765 ifam->ifam_pid = 0; 1766 ifam->ifam_addrflags = if_addrflags(ifa); 1767 #endif 1768 if ((error = copyout(w->w_tmem, w->w_where, len)) == 0) 1769 w->w_where = (char *)w->w_where + len; 1770 } 1771 return error; 1772 } 1773 1774 static int 1775 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1776 { 1777 struct ifnet *ifp; 1778 struct ifaddr *ifa; 1779 struct rt_addrinfo info; 1780 int cmd, len, error = 0; 1781 int (*iflist_if)(struct ifnet *, struct rt_walkarg *, 1782 struct rt_addrinfo *, size_t); 1783 int (*iflist_addr)(struct rt_walkarg *, struct ifaddr *, 1784 struct rt_addrinfo *); 1785 int s; 1786 struct psref psref; 1787 int bound; 1788 1789 switch (type) { 1790 case NET_RT_IFLIST: 1791 cmd = RTM_IFINFO; 1792 iflist_if = sysctl_iflist_if; 1793 iflist_addr = sysctl_iflist_addr; 1794 break; 1795 #ifdef COMPAT_14 1796 case NET_RT_OOOIFLIST: 1797 cmd = RTM_OOIFINFO; 1798 iflist_if = compat_14_iflist; 1799 iflist_addr = compat_70_iflist_addr; 1800 break; 1801 #endif 1802 #ifdef COMPAT_50 1803 case NET_RT_OOIFLIST: 1804 cmd = RTM_OIFINFO; 1805 iflist_if = compat_50_iflist; 1806 iflist_addr = compat_70_iflist_addr; 1807 break; 1808 #endif 1809 #ifdef COMPAT_70 1810 case NET_RT_OIFLIST: 1811 cmd = RTM_IFINFO; 1812 iflist_if = sysctl_iflist_if; 1813 iflist_addr = compat_70_iflist_addr; 1814 break; 1815 #endif 1816 default: 1817 #ifdef RTSOCK_DEBUG 1818 printf("%s: unsupported IFLIST type %d\n", __func__, type); 1819 #endif 1820 return EINVAL; 1821 } 1822 1823 memset(&info, 0, sizeof(info)); 1824 1825 bound = curlwp_bind(); 1826 s = pserialize_read_enter(); 1827 IFNET_READER_FOREACH(ifp) { 1828 int _s; 1829 if (w->w_arg && w->w_arg != ifp->if_index) 1830 continue; 1831 if (IFADDR_READER_EMPTY(ifp)) 1832 continue; 1833 1834 if_acquire(ifp, &psref); 1835 pserialize_read_exit(s); 1836 1837 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1838 if ((error = rt_msg2(cmd, &info, NULL, w, &len)) != 0) 1839 goto release_exit; 1840 info.rti_info[RTAX_IFP] = NULL; 1841 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1842 if ((error = iflist_if(ifp, w, &info, len)) != 0) 1843 goto release_exit; 1844 } 1845 _s = pserialize_read_enter(); 1846 IFADDR_READER_FOREACH(ifa, ifp) { 1847 struct psref _psref; 1848 if (af && af != ifa->ifa_addr->sa_family) 1849 continue; 1850 ifa_acquire(ifa, &_psref); 1851 pserialize_read_exit(_s); 1852 1853 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1854 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1855 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1856 error = iflist_addr(w, ifa, &info); 1857 1858 _s = pserialize_read_enter(); 1859 ifa_release(ifa, &_psref); 1860 if (error != 0) { 1861 pserialize_read_exit(_s); 1862 goto release_exit; 1863 } 1864 } 1865 pserialize_read_exit(_s); 1866 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1867 info.rti_info[RTAX_BRD] = NULL; 1868 1869 s = pserialize_read_enter(); 1870 if_release(ifp, &psref); 1871 } 1872 pserialize_read_exit(s); 1873 curlwp_bindx(bound); 1874 1875 return 0; 1876 1877 release_exit: 1878 if_release(ifp, &psref); 1879 curlwp_bindx(bound); 1880 return error; 1881 } 1882 1883 static int 1884 sysctl_rtable(SYSCTLFN_ARGS) 1885 { 1886 void *where = oldp; 1887 size_t *given = oldlenp; 1888 int i, s, error = EINVAL; 1889 u_char af; 1890 struct rt_walkarg w; 1891 1892 if (namelen == 1 && name[0] == CTL_QUERY) 1893 return sysctl_query(SYSCTLFN_CALL(rnode)); 1894 1895 if (newp) 1896 return EPERM; 1897 if (namelen != 3) 1898 return EINVAL; 1899 af = name[0]; 1900 w.w_tmemneeded = 0; 1901 w.w_tmemsize = 0; 1902 w.w_tmem = NULL; 1903 again: 1904 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1905 if (w.w_tmemneeded) { 1906 w.w_tmem = kmem_alloc(w.w_tmemneeded, KM_SLEEP); 1907 w.w_tmemsize = w.w_tmemneeded; 1908 w.w_tmemneeded = 0; 1909 } 1910 w.w_op = name[1]; 1911 w.w_arg = name[2]; 1912 w.w_given = *given; 1913 w.w_needed = 0 - w.w_given; 1914 w.w_where = where; 1915 1916 s = splsoftnet(); 1917 switch (w.w_op) { 1918 1919 case NET_RT_DUMP: 1920 case NET_RT_FLAGS: 1921 #if defined(INET) || defined(INET6) 1922 /* 1923 * take care of llinfo entries, the caller must 1924 * specify an AF 1925 */ 1926 if (w.w_op == NET_RT_FLAGS && 1927 (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { 1928 if (af != 0) 1929 error = lltable_sysctl_dump(af, &w); 1930 else 1931 error = EINVAL; 1932 break; 1933 } 1934 #endif 1935 1936 for (i = 1; i <= AF_MAX; i++) 1937 if ((af == 0 || af == i) && 1938 (error = rt_walktree(i, sysctl_dumpentry, &w))) 1939 break; 1940 break; 1941 1942 #ifdef COMPAT_14 1943 case NET_RT_OOOIFLIST: 1944 error = sysctl_iflist(af, &w, w.w_op); 1945 break; 1946 #endif 1947 #ifdef COMPAT_50 1948 case NET_RT_OOIFLIST: 1949 error = sysctl_iflist(af, &w, w.w_op); 1950 break; 1951 #endif 1952 #ifdef COMPAT_70 1953 case NET_RT_OIFLIST: 1954 error = sysctl_iflist(af, &w, w.w_op); 1955 break; 1956 #endif 1957 case NET_RT_IFLIST: 1958 error = sysctl_iflist(af, &w, w.w_op); 1959 break; 1960 } 1961 splx(s); 1962 1963 /* check to see if we couldn't allocate memory with NOWAIT */ 1964 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1965 goto again; 1966 1967 if (w.w_tmem) 1968 kmem_free(w.w_tmem, w.w_tmemsize); 1969 w.w_needed += w.w_given; 1970 if (where) { 1971 *given = (char *)w.w_where - (char *)where; 1972 if (*given < w.w_needed) 1973 return ENOMEM; 1974 } else { 1975 *given = (11 * w.w_needed) / 10; 1976 } 1977 return error; 1978 } 1979 1980 /* 1981 * Routing message software interrupt routine 1982 */ 1983 static void 1984 COMPATNAME(route_intr)(void *cookie) 1985 { 1986 struct sockproto proto = { .sp_family = PF_XROUTE, }; 1987 struct route_info * const ri = &COMPATNAME(route_info); 1988 struct mbuf *m; 1989 1990 mutex_enter(softnet_lock); 1991 KERNEL_LOCK(1, NULL); 1992 for (;;) { 1993 IFQ_LOCK(&ri->ri_intrq); 1994 IF_DEQUEUE(&ri->ri_intrq, m); 1995 IFQ_UNLOCK(&ri->ri_intrq); 1996 if (m == NULL) 1997 break; 1998 proto.sp_protocol = M_GETCTX(m, uintptr_t); 1999 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); 2000 } 2001 KERNEL_UNLOCK_ONE(NULL); 2002 mutex_exit(softnet_lock); 2003 } 2004 2005 /* 2006 * Enqueue a message to the software interrupt routine. 2007 */ 2008 void 2009 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 2010 { 2011 struct route_info * const ri = &COMPATNAME(route_info); 2012 int wasempty; 2013 2014 IFQ_LOCK(&ri->ri_intrq); 2015 if (IF_QFULL(&ri->ri_intrq)) { 2016 IF_DROP(&ri->ri_intrq); 2017 IFQ_UNLOCK(&ri->ri_intrq); 2018 m_freem(m); 2019 } else { 2020 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 2021 M_SETCTX(m, (uintptr_t)family); 2022 IF_ENQUEUE(&ri->ri_intrq, m); 2023 IFQ_UNLOCK(&ri->ri_intrq); 2024 if (wasempty) { 2025 kpreempt_disable(); 2026 softint_schedule(ri->ri_sih); 2027 kpreempt_enable(); 2028 } 2029 } 2030 } 2031 2032 static void 2033 COMPATNAME(route_init)(void) 2034 { 2035 struct route_info * const ri = &COMPATNAME(route_info); 2036 2037 #ifndef COMPAT_RTSOCK 2038 rt_init(); 2039 #endif 2040 2041 sysctl_net_route_setup(NULL); 2042 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 2043 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 2044 COMPATNAME(route_intr), NULL); 2045 IFQ_LOCK_INIT(&ri->ri_intrq); 2046 } 2047 2048 /* 2049 * Definitions of protocols supported in the ROUTE domain. 2050 */ 2051 #ifndef COMPAT_RTSOCK 2052 PR_WRAP_USRREQS(route); 2053 #else 2054 PR_WRAP_USRREQS(compat_50_route); 2055 #endif 2056 2057 static const struct pr_usrreqs route_usrreqs = { 2058 .pr_attach = COMPATNAME(route_attach_wrapper), 2059 .pr_detach = COMPATNAME(route_detach_wrapper), 2060 .pr_accept = COMPATNAME(route_accept_wrapper), 2061 .pr_bind = COMPATNAME(route_bind_wrapper), 2062 .pr_listen = COMPATNAME(route_listen_wrapper), 2063 .pr_connect = COMPATNAME(route_connect_wrapper), 2064 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 2065 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 2066 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 2067 .pr_abort = COMPATNAME(route_abort_wrapper), 2068 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 2069 .pr_stat = COMPATNAME(route_stat_wrapper), 2070 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 2071 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 2072 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 2073 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 2074 .pr_send = COMPATNAME(route_send_wrapper), 2075 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 2076 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 2077 }; 2078 2079 static const struct protosw COMPATNAME(route_protosw)[] = { 2080 { 2081 .pr_type = SOCK_RAW, 2082 .pr_domain = &COMPATNAME(routedomain), 2083 .pr_flags = PR_ATOMIC|PR_ADDR, 2084 .pr_input = raw_input, 2085 .pr_ctlinput = raw_ctlinput, 2086 .pr_ctloutput = route_ctloutput, 2087 .pr_usrreqs = &route_usrreqs, 2088 .pr_init = raw_init, 2089 }, 2090 }; 2091 2092 struct domain COMPATNAME(routedomain) = { 2093 .dom_family = PF_XROUTE, 2094 .dom_name = DOMAINNAME, 2095 .dom_init = COMPATNAME(route_init), 2096 .dom_protosw = COMPATNAME(route_protosw), 2097 .dom_protoswNPROTOSW = 2098 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 2099 }; 2100 2101 static void 2102 sysctl_net_route_setup(struct sysctllog **clog) 2103 { 2104 const struct sysctlnode *rnode = NULL; 2105 2106 sysctl_createv(clog, 0, NULL, &rnode, 2107 CTLFLAG_PERMANENT, 2108 CTLTYPE_NODE, DOMAINNAME, 2109 SYSCTL_DESCR("PF_ROUTE information"), 2110 NULL, 0, NULL, 0, 2111 CTL_NET, PF_XROUTE, CTL_EOL); 2112 2113 sysctl_createv(clog, 0, NULL, NULL, 2114 CTLFLAG_PERMANENT, 2115 CTLTYPE_NODE, "rtable", 2116 SYSCTL_DESCR("Routing table information"), 2117 sysctl_rtable, 0, NULL, 0, 2118 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 2119 2120 sysctl_createv(clog, 0, &rnode, NULL, 2121 CTLFLAG_PERMANENT, 2122 CTLTYPE_STRUCT, "stats", 2123 SYSCTL_DESCR("Routing statistics"), 2124 NULL, 0, &rtstat, sizeof(rtstat), 2125 CTL_CREATE, CTL_EOL); 2126 } 2127
Indexes created Mon Sep 22 21:09:42 GMT 2025