rtsock.c revision 1.213
1 /* $NetBSD: rtsock.c,v 1.213 2017/06/01 02:45:14 chs 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 1.213 2017/06/01 02:45:14 chs 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 struct ifnet *ifp; 540 541 if ((rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) == 0) 542 ; 543 else if ((ifp = rt->rt_ifp) != NULL) { 544 const struct ifaddr *rtifa; 545 info->rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 546 /* rtifa used to be simply rt->rt_ifa. 547 * If rt->rt_ifa != NULL, then 548 * rt_get_ifa() != NULL. So this 549 * ought to still be safe. --dyoung 550 */ 551 rtifa = rt_get_ifa(rt); 552 info->rti_info[RTAX_IFA] = rtifa->ifa_addr; 553 #ifdef RTSOCK_DEBUG 554 if (info->rti_info[RTAX_IFA]->sa_family == AF_INET) { 555 char ibuf[INET_ADDRSTRLEN]; 556 char abuf[INET_ADDRSTRLEN]; 557 printf("%s: copying out RTAX_IFA %s " 558 "for info->rti_info[RTAX_DST] %s " 559 "ifa_getifa %p ifa_seqno %p\n", 560 __func__, 561 RT_IN_PRINT(info, ibuf, RTAX_IFA), 562 RT_IN_PRINT(info, abuf, RTAX_DST), 563 (void *)rtifa->ifa_getifa, 564 rtifa->ifa_seqno); 565 } 566 #endif /* RTSOCK_DEBUG */ 567 if (ifp->if_flags & IFF_POINTOPOINT) 568 info->rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 569 else 570 info->rti_info[RTAX_BRD] = NULL; 571 rtm->rtm_index = ifp->if_index; 572 } else { 573 info->rti_info[RTAX_IFP] = NULL; 574 info->rti_info[RTAX_IFA] = NULL; 575 } 576 (void)rt_msg2(rtm->rtm_type, info, NULL, NULL, &len); 577 if (len > rtm->rtm_msglen) { 578 struct rt_xmsghdr *old_rtm = rtm; 579 R_Malloc(*new_rtm, struct rt_xmsghdr *, len); 580 if (*new_rtm == NULL) 581 return ENOBUFS; 582 (void)memcpy(*new_rtm, old_rtm, old_rtm->rtm_msglen); 583 rtm = *new_rtm; 584 } 585 (void)rt_msg2(rtm->rtm_type, info, rtm, NULL, 0); 586 rtm->rtm_flags = rt->rt_flags; 587 rtm_setmetrics(rt, rtm); 588 rtm->rtm_addrs = info->rti_addrs; 589 590 return 0; 591 } 592 593 static struct ifaddr * 594 route_output_get_ifa(const struct rt_addrinfo info, const struct rtentry *rt, 595 struct ifnet **ifp, struct psref *psref) 596 { 597 struct ifaddr *ifa = NULL; 598 599 *ifp = NULL; 600 if (info.rti_info[RTAX_IFP] != NULL) { 601 ifa = ifa_ifwithnet_psref(info.rti_info[RTAX_IFP], psref); 602 if (ifa == NULL) 603 goto next; 604 *ifp = ifa->ifa_ifp; 605 if (info.rti_info[RTAX_IFA] == NULL && 606 info.rti_info[RTAX_GATEWAY] == NULL) 607 goto next; 608 if (info.rti_info[RTAX_IFA] == NULL) { 609 /* route change <dst> <gw> -ifp <if> */ 610 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_GATEWAY], 611 *ifp, psref); 612 } else { 613 /* route change <dst> -ifp <if> -ifa <addr> */ 614 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 615 if (ifa != NULL) 616 goto out; 617 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_IFA], 618 *ifp, psref); 619 } 620 goto out; 621 } 622 next: 623 if (info.rti_info[RTAX_IFA] != NULL) { 624 /* route change <dst> <gw> -ifa <addr> */ 625 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 626 if (ifa != NULL) 627 goto out; 628 } 629 if (info.rti_info[RTAX_GATEWAY] != NULL) { 630 /* route change <dst> <gw> */ 631 ifa = ifa_ifwithroute_psref(rt->rt_flags, rt_getkey(rt), 632 info.rti_info[RTAX_GATEWAY], psref); 633 } 634 out: 635 if (ifa != NULL && *ifp == NULL) 636 *ifp = ifa->ifa_ifp; 637 return ifa; 638 } 639 640 static int 641 route_output_change(struct rtentry *rt, struct rt_addrinfo *info, 642 struct rt_xmsghdr *rtm) 643 { 644 int error = 0; 645 struct ifnet *ifp = NULL, *new_ifp; 646 struct ifaddr *ifa = NULL, *new_ifa; 647 struct psref psref_ifa, psref_new_ifa, psref_ifp; 648 bool newgw; 649 650 /* 651 * New gateway could require new ifaddr, ifp; 652 * flags may also be different; ifp may be specified 653 * by ll sockaddr when protocol address is ambiguous 654 */ 655 newgw = info->rti_info[RTAX_GATEWAY] != NULL && 656 sockaddr_cmp(info->rti_info[RTAX_GATEWAY], rt->rt_gateway) != 0; 657 658 if (newgw || info->rti_info[RTAX_IFP] != NULL || 659 info->rti_info[RTAX_IFA] != NULL) { 660 ifp = rt_getifp(info, &psref_ifp); 661 ifa = rt_getifa(info, &psref_ifa); 662 if (ifa == NULL) { 663 error = ENETUNREACH; 664 goto out; 665 } 666 } 667 if (newgw) { 668 error = rt_setgate(rt, info->rti_info[RTAX_GATEWAY]); 669 if (error != 0) 670 goto out; 671 } 672 if (info->rti_info[RTAX_TAG]) { 673 const struct sockaddr *tag; 674 tag = rt_settag(rt, info->rti_info[RTAX_TAG]); 675 if (tag == NULL) { 676 error = ENOBUFS; 677 goto out; 678 } 679 } 680 /* 681 * New gateway could require new ifaddr, ifp; 682 * flags may also be different; ifp may be specified 683 * by ll sockaddr when protocol address is ambiguous 684 */ 685 new_ifa = route_output_get_ifa(*info, rt, &new_ifp, &psref_new_ifa); 686 if (new_ifa != NULL) { 687 ifa_release(ifa, &psref_ifa); 688 ifa = new_ifa; 689 } 690 if (ifa) { 691 struct ifaddr *oifa = rt->rt_ifa; 692 if (oifa != ifa && !ifa_is_destroying(ifa) && 693 new_ifp != NULL && !if_is_deactivated(new_ifp)) { 694 if (oifa && oifa->ifa_rtrequest) 695 oifa->ifa_rtrequest(RTM_DELETE, rt, info); 696 rt_replace_ifa(rt, ifa); 697 rt->rt_ifp = new_ifp; 698 } 699 if (new_ifa == NULL) 700 ifa_release(ifa, &psref_ifa); 701 } 702 ifa_release(new_ifa, &psref_new_ifa); 703 if (new_ifp && rt->rt_ifp != new_ifp && !if_is_deactivated(new_ifp)) 704 rt->rt_ifp = new_ifp; 705 rt_setmetrics(rtm->rtm_inits, rtm, rt); 706 if (rt->rt_flags != info->rti_flags) { 707 rt->rt_flags = (info->rti_flags & ~PRESERVED_RTF) | 708 (rt->rt_flags & PRESERVED_RTF); 709 } 710 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 711 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info); 712 out: 713 if_put(ifp, &psref_ifp); 714 715 return error; 716 } 717 718 /*ARGSUSED*/ 719 int 720 COMPATNAME(route_output)(struct mbuf *m, struct socket *so) 721 { 722 struct sockproto proto = { .sp_family = PF_XROUTE, }; 723 struct rt_xmsghdr *rtm = NULL; 724 struct rt_xmsghdr *old_rtm = NULL, *new_rtm = NULL; 725 struct rtentry *rt = NULL; 726 struct rtentry *saved_nrt = NULL; 727 struct rt_addrinfo info; 728 int len, error = 0; 729 sa_family_t family; 730 struct sockaddr_dl sdl; 731 int bound = curlwp_bind(); 732 bool do_rt_free = false; 733 734 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 735 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 736 (m = m_pullup(m, sizeof(int32_t))) == NULL)) { 737 error = ENOBUFS; 738 goto out; 739 } 740 if ((m->m_flags & M_PKTHDR) == 0) 741 panic("%s", __func__); 742 len = m->m_pkthdr.len; 743 if (len < sizeof(*rtm) || 744 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 745 info.rti_info[RTAX_DST] = NULL; 746 senderr(EINVAL); 747 } 748 R_Malloc(rtm, struct rt_xmsghdr *, len); 749 if (rtm == NULL) { 750 info.rti_info[RTAX_DST] = NULL; 751 senderr(ENOBUFS); 752 } 753 m_copydata(m, 0, len, rtm); 754 if (rtm->rtm_version != RTM_XVERSION) { 755 info.rti_info[RTAX_DST] = NULL; 756 senderr(EPROTONOSUPPORT); 757 } 758 rtm->rtm_pid = curproc->p_pid; 759 memset(&info, 0, sizeof(info)); 760 info.rti_addrs = rtm->rtm_addrs; 761 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 762 &info)) { 763 senderr(EINVAL); 764 } 765 info.rti_flags = rtm->rtm_flags; 766 #ifdef RTSOCK_DEBUG 767 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 768 char abuf[INET_ADDRSTRLEN]; 769 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 770 RT_IN_PRINT(&info, abuf, RTAX_DST)); 771 } 772 #endif /* RTSOCK_DEBUG */ 773 if (info.rti_info[RTAX_DST] == NULL || 774 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 775 senderr(EINVAL); 776 } 777 if (info.rti_info[RTAX_GATEWAY] != NULL && 778 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 779 senderr(EINVAL); 780 } 781 782 /* 783 * Verify that the caller has the appropriate privilege; RTM_GET 784 * is the only operation the non-superuser is allowed. 785 */ 786 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 787 0, rtm, NULL, NULL) != 0) 788 senderr(EACCES); 789 790 switch (rtm->rtm_type) { 791 792 case RTM_ADD: 793 if (info.rti_info[RTAX_GATEWAY] == NULL) { 794 senderr(EINVAL); 795 } 796 #ifdef INET 797 /* support for new ARP code with keeping backcompat */ 798 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { 799 const struct sockaddr_dl *sdlp = 800 satocsdl(info.rti_info[RTAX_GATEWAY]); 801 802 /* Allow routing requests by interface index */ 803 if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 804 && sdlp->sdl_slen == 0) 805 goto fallback; 806 /* 807 * Old arp binaries don't set the sdl_index 808 * so we have to complement it. 809 */ 810 int sdl_index = sdlp->sdl_index; 811 if (sdl_index == 0) { 812 error = route_get_sdl_index(&info, &sdl_index); 813 if (error != 0) 814 goto fallback; 815 } else if ( 816 info.rti_info[RTAX_DST]->sa_family == AF_INET) { 817 /* 818 * XXX workaround for SIN_PROXY case; proxy arp 819 * entry should be in an interface that has 820 * a network route including the destination, 821 * not a local (link) route that may not be a 822 * desired place, for example a tap. 823 */ 824 const struct sockaddr_inarp *sina = 825 (const struct sockaddr_inarp *) 826 info.rti_info[RTAX_DST]; 827 if (sina->sin_other & SIN_PROXY) { 828 error = route_get_sdl_index(&info, 829 &sdl_index); 830 if (error != 0) 831 goto fallback; 832 } 833 } 834 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 835 rtm->rtm_rmx.rmx_expire, &info, sdl_index); 836 break; 837 } 838 fallback: 839 #endif /* INET */ 840 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 841 if (error == 0) { 842 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 843 rt_unref(saved_nrt); 844 } 845 break; 846 847 case RTM_DELETE: 848 #ifdef INET 849 /* support for new ARP code */ 850 if (info.rti_info[RTAX_GATEWAY] && 851 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 852 (rtm->rtm_flags & RTF_LLDATA) != 0) { 853 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 854 rtm->rtm_rmx.rmx_expire, &info, 0); 855 break; 856 } 857 #endif /* INET */ 858 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 859 if (error != 0) 860 break; 861 862 rt = saved_nrt; 863 do_rt_free = true; 864 info.rti_info[RTAX_DST] = rt_getkey(rt); 865 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 866 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 867 info.rti_info[RTAX_TAG] = rt_gettag(rt); 868 error = route_output_report(rt, &info, rtm, &new_rtm); 869 if (error) 870 senderr(error); 871 if (new_rtm != NULL) { 872 old_rtm = rtm; 873 rtm = new_rtm; 874 } 875 break; 876 877 case RTM_GET: 878 case RTM_CHANGE: 879 case RTM_LOCK: 880 /* XXX This will mask info.rti_info[RTAX_DST] with 881 * info.rti_info[RTAX_NETMASK] before 882 * searching. It did not used to do that. --dyoung 883 */ 884 rt = NULL; 885 error = rtrequest1(RTM_GET, &info, &rt); 886 if (error != 0) 887 senderr(error); 888 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 889 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 890 info.rti_info[RTAX_DST]->sa_len) != 0) 891 senderr(ESRCH); 892 if (info.rti_info[RTAX_NETMASK] == NULL && 893 rt_mask(rt) != NULL) 894 senderr(ETOOMANYREFS); 895 } 896 897 /* 898 * XXX if arp/ndp requests an L2 entry, we have to obtain 899 * it from lltable while for the route command we have to 900 * return a route as it is. How to distinguish them? 901 * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp 902 * indicates an L2 entry is requested. For old arp/ndp 903 * binaries, we check RTF_UP flag is NOT set; it works 904 * by the fact that arp/ndp don't set it while the route 905 * command sets it. 906 */ 907 if (((rtm->rtm_flags & RTF_LLDATA) != 0 || 908 (rtm->rtm_flags & RTF_UP) == 0) && 909 rtm->rtm_type == RTM_GET && 910 sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { 911 int ll_flags = 0; 912 route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, 913 &ll_flags); 914 info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); 915 error = route_output_report(rt, &info, rtm, &new_rtm); 916 if (error) 917 senderr(error); 918 if (new_rtm != NULL) { 919 old_rtm = rtm; 920 rtm = new_rtm; 921 } 922 rtm->rtm_flags |= RTF_LLDATA; 923 rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; 924 break; 925 } 926 927 switch (rtm->rtm_type) { 928 case RTM_GET: 929 info.rti_info[RTAX_DST] = rt_getkey(rt); 930 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 931 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 932 info.rti_info[RTAX_TAG] = rt_gettag(rt); 933 error = route_output_report(rt, &info, rtm, &new_rtm); 934 if (error) 935 senderr(error); 936 if (new_rtm != NULL) { 937 old_rtm = rtm; 938 rtm = new_rtm; 939 } 940 break; 941 942 case RTM_CHANGE: 943 #ifdef NET_MPSAFE 944 error = rt_update_prepare(rt); 945 if (error == 0) { 946 error = route_output_change(rt, &info, rtm); 947 rt_update_finish(rt); 948 } 949 #else 950 error = route_output_change(rt, &info, rtm); 951 #endif 952 if (error != 0) 953 goto flush; 954 /*FALLTHROUGH*/ 955 case RTM_LOCK: 956 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 957 rt->rt_rmx.rmx_locks |= 958 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 959 break; 960 } 961 break; 962 963 default: 964 senderr(EOPNOTSUPP); 965 } 966 967 flush: 968 if (rtm) { 969 if (error) 970 rtm->rtm_errno = error; 971 else 972 rtm->rtm_flags |= RTF_DONE; 973 } 974 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 975 0; 976 /* We cannot free old_rtm until we have stopped using the 977 * pointers in info, some of which may point to sockaddrs 978 * in old_rtm. 979 */ 980 if (old_rtm != NULL) 981 Free(old_rtm); 982 if (rt) { 983 if (do_rt_free) 984 rt_free(rt); 985 else 986 rt_unref(rt); 987 } 988 { 989 struct rawcb *rp = NULL; 990 /* 991 * Check to see if we don't want our own messages. 992 */ 993 if ((so->so_options & SO_USELOOPBACK) == 0) { 994 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 995 if (rtm) 996 Free(rtm); 997 m_freem(m); 998 goto out; 999 } 1000 /* There is another listener, so construct message */ 1001 rp = sotorawcb(so); 1002 } 1003 if (rtm) { 1004 m_copyback(m, 0, rtm->rtm_msglen, rtm); 1005 if (m->m_pkthdr.len < rtm->rtm_msglen) { 1006 m_freem(m); 1007 m = NULL; 1008 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 1009 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 1010 Free(rtm); 1011 } 1012 if (rp) 1013 rp->rcb_proto.sp_family = 0; /* Avoid us */ 1014 if (family) 1015 proto.sp_protocol = family; 1016 if (m) 1017 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 1018 &COMPATNAME(route_info).ri_dst); 1019 if (rp) 1020 rp->rcb_proto.sp_family = PF_XROUTE; 1021 } 1022 out: 1023 curlwp_bindx(bound); 1024 return error; 1025 } 1026 1027 static int 1028 route_ctloutput(int op, struct socket *so, struct sockopt *sopt) 1029 { 1030 struct routecb *rop = sotoroutecb(so); 1031 int error = 0; 1032 unsigned char *rtm_type; 1033 size_t len; 1034 unsigned int msgfilter; 1035 1036 KASSERT(solocked(so)); 1037 1038 if (sopt->sopt_level != AF_ROUTE) { 1039 error = ENOPROTOOPT; 1040 } else switch (op) { 1041 case PRCO_SETOPT: 1042 switch (sopt->sopt_name) { 1043 case RO_MSGFILTER: 1044 msgfilter = 0; 1045 for (rtm_type = sopt->sopt_data, len = sopt->sopt_size; 1046 len != 0; 1047 rtm_type++, len -= sizeof(*rtm_type)) 1048 { 1049 /* Guard against overflowing our storage. */ 1050 if (*rtm_type >= sizeof(msgfilter) * CHAR_BIT) { 1051 error = EOVERFLOW; 1052 break; 1053 } 1054 msgfilter |= RTMSGFILTER(*rtm_type); 1055 } 1056 if (error == 0) 1057 rop->rocb_msgfilter = msgfilter; 1058 break; 1059 default: 1060 error = ENOPROTOOPT; 1061 break; 1062 } 1063 break; 1064 case PRCO_GETOPT: 1065 switch (sopt->sopt_name) { 1066 case RO_MSGFILTER: 1067 error = ENOTSUP; 1068 break; 1069 default: 1070 error = ENOPROTOOPT; 1071 break; 1072 } 1073 } 1074 return error; 1075 } 1076 1077 static void 1078 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 1079 { 1080 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 1081 metric(RTV_RPIPE, rmx_recvpipe); 1082 metric(RTV_SPIPE, rmx_sendpipe); 1083 metric(RTV_SSTHRESH, rmx_ssthresh); 1084 metric(RTV_RTT, rmx_rtt); 1085 metric(RTV_RTTVAR, rmx_rttvar); 1086 metric(RTV_HOPCOUNT, rmx_hopcount); 1087 metric(RTV_MTU, rmx_mtu); 1088 #undef metric 1089 if (which & RTV_EXPIRE) { 1090 out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? 1091 time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; 1092 } 1093 } 1094 1095 static void 1096 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 1097 { 1098 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 1099 metric(rmx_recvpipe); 1100 metric(rmx_sendpipe); 1101 metric(rmx_ssthresh); 1102 metric(rmx_rtt); 1103 metric(rmx_rttvar); 1104 metric(rmx_hopcount); 1105 metric(rmx_mtu); 1106 metric(rmx_locks); 1107 #undef metric 1108 out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? 1109 time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; 1110 } 1111 1112 static int 1113 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 1114 struct rt_addrinfo *rtinfo) 1115 { 1116 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 1117 int i; 1118 1119 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 1120 if ((rtinfo->rti_addrs & (1 << i)) == 0) 1121 continue; 1122 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 1123 RT_XADVANCE(cp, sa); 1124 } 1125 1126 /* 1127 * Check for extra addresses specified, except RTM_GET asking 1128 * for interface info. 1129 */ 1130 if (rtmtype == RTM_GET) { 1131 if (((rtinfo->rti_addrs & 1132 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0U << i)) != 0) 1133 return 1; 1134 } else if ((rtinfo->rti_addrs & (~0U << i)) != 0) 1135 return 1; 1136 /* Check for bad data length. */ 1137 if (cp != cplim) { 1138 if (i == RTAX_NETMASK + 1 && sa != NULL && 1139 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 1140 /* 1141 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 1142 * We accept this for now for the sake of old 1143 * binaries or third party softwares. 1144 */ 1145 ; 1146 else 1147 return 1; 1148 } 1149 return 0; 1150 } 1151 1152 static int 1153 rt_getlen(int type) 1154 { 1155 #ifndef COMPAT_RTSOCK 1156 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 1157 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 1158 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 1159 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 1160 #endif 1161 1162 switch (type) { 1163 case RTM_ODELADDR: 1164 case RTM_ONEWADDR: 1165 case RTM_OCHGADDR: 1166 #ifdef COMPAT_70 1167 return sizeof(struct ifa_msghdr70); 1168 #else 1169 #ifdef RTSOCK_DEBUG 1170 printf("%s: unsupported RTM type %d\n", __func__, type); 1171 #endif 1172 return -1; 1173 #endif 1174 case RTM_DELADDR: 1175 case RTM_NEWADDR: 1176 case RTM_CHGADDR: 1177 return sizeof(struct ifa_xmsghdr); 1178 1179 case RTM_OOIFINFO: 1180 #ifdef COMPAT_14 1181 return sizeof(struct if_msghdr14); 1182 #else 1183 #ifdef RTSOCK_DEBUG 1184 printf("%s: unsupported RTM type RTM_OOIFINFO\n", __func__); 1185 #endif 1186 return -1; 1187 #endif 1188 case RTM_OIFINFO: 1189 #ifdef COMPAT_50 1190 return sizeof(struct if_msghdr50); 1191 #else 1192 #ifdef RTSOCK_DEBUG 1193 printf("%s: unsupported RTM type RTM_OIFINFO\n", __func__); 1194 #endif 1195 return -1; 1196 #endif 1197 1198 case RTM_IFINFO: 1199 return sizeof(struct if_xmsghdr); 1200 1201 case RTM_IFANNOUNCE: 1202 case RTM_IEEE80211: 1203 return sizeof(struct if_xannouncemsghdr); 1204 1205 default: 1206 return sizeof(struct rt_xmsghdr); 1207 } 1208 } 1209 1210 1211 struct mbuf * 1212 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 1213 { 1214 struct rt_xmsghdr *rtm; 1215 struct mbuf *m; 1216 int i; 1217 const struct sockaddr *sa; 1218 int len, dlen; 1219 1220 m = m_gethdr(M_DONTWAIT, MT_DATA); 1221 if (m == NULL) 1222 return m; 1223 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 1224 1225 if ((len = rt_getlen(type)) == -1) 1226 goto out; 1227 if (len > MHLEN + MLEN) 1228 panic("%s: message too long", __func__); 1229 else if (len > MHLEN) { 1230 m->m_next = m_get(M_DONTWAIT, MT_DATA); 1231 if (m->m_next == NULL) 1232 goto out; 1233 MCLAIM(m->m_next, m->m_owner); 1234 m->m_pkthdr.len = len; 1235 m->m_len = MHLEN; 1236 m->m_next->m_len = len - MHLEN; 1237 } else { 1238 m->m_pkthdr.len = m->m_len = len; 1239 } 1240 m_reset_rcvif(m); 1241 m_copyback(m, 0, datalen, data); 1242 if (len > datalen) 1243 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 1244 rtm = mtod(m, struct rt_xmsghdr *); 1245 for (i = 0; i < RTAX_MAX; i++) { 1246 if ((sa = rtinfo->rti_info[i]) == NULL) 1247 continue; 1248 rtinfo->rti_addrs |= (1 << i); 1249 dlen = RT_XROUNDUP(sa->sa_len); 1250 m_copyback(m, len, sa->sa_len, sa); 1251 if (dlen != sa->sa_len) { 1252 /* 1253 * Up to 6 + 1 nul's since roundup is to 1254 * sizeof(uint64_t) (8 bytes) 1255 */ 1256 m_copyback(m, len + sa->sa_len, 1257 dlen - sa->sa_len, "\0\0\0\0\0\0"); 1258 } 1259 len += dlen; 1260 } 1261 if (m->m_pkthdr.len != len) 1262 goto out; 1263 rtm->rtm_msglen = len; 1264 rtm->rtm_version = RTM_XVERSION; 1265 rtm->rtm_type = type; 1266 return m; 1267 out: 1268 m_freem(m); 1269 return NULL; 1270 } 1271 1272 /* 1273 * rt_msg2 1274 * 1275 * fills 'cp' or 'w'.w_tmem with the routing socket message and 1276 * returns the length of the message in 'lenp'. 1277 * 1278 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 1279 * the message 1280 * otherwise walkarg's w_needed is updated and if the user buffer is 1281 * specified and w_needed indicates space exists the information is copied 1282 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 1283 * if the allocation fails ENOBUFS is returned. 1284 */ 1285 static int 1286 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1287 int *lenp) 1288 { 1289 int i; 1290 int len, dlen, second_time = 0; 1291 char *cp0, *cp = cpv; 1292 1293 rtinfo->rti_addrs = 0; 1294 again: 1295 if ((len = rt_getlen(type)) == -1) 1296 return EINVAL; 1297 1298 if ((cp0 = cp) != NULL) 1299 cp += len; 1300 for (i = 0; i < RTAX_MAX; i++) { 1301 const struct sockaddr *sa; 1302 1303 if ((sa = rtinfo->rti_info[i]) == NULL) 1304 continue; 1305 rtinfo->rti_addrs |= (1 << i); 1306 dlen = RT_XROUNDUP(sa->sa_len); 1307 if (cp) { 1308 int diff = dlen - sa->sa_len; 1309 (void)memcpy(cp, sa, (size_t)sa->sa_len); 1310 cp += sa->sa_len; 1311 if (diff > 0) { 1312 (void)memset(cp, 0, (size_t)diff); 1313 cp += diff; 1314 } 1315 } 1316 len += dlen; 1317 } 1318 if (cp == NULL && w != NULL && !second_time) { 1319 struct rt_walkarg *rw = w; 1320 1321 rw->w_needed += len; 1322 if (rw->w_needed <= 0 && rw->w_where) { 1323 if (rw->w_tmemsize < len) { 1324 if (rw->w_tmem) 1325 kmem_free(rw->w_tmem, rw->w_tmemsize); 1326 rw->w_tmem = kmem_alloc(len, KM_SLEEP); 1327 rw->w_tmemsize = len; 1328 } 1329 if (rw->w_tmem) { 1330 cp = rw->w_tmem; 1331 second_time = 1; 1332 goto again; 1333 } else { 1334 rw->w_tmemneeded = len; 1335 return ENOBUFS; 1336 } 1337 } 1338 } 1339 if (cp) { 1340 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 1341 1342 rtm->rtm_version = RTM_XVERSION; 1343 rtm->rtm_type = type; 1344 rtm->rtm_msglen = len; 1345 } 1346 if (lenp) 1347 *lenp = len; 1348 return 0; 1349 } 1350 1351 #ifndef COMPAT_RTSOCK 1352 int 1353 rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1354 int *lenp) 1355 { 1356 return rt_msg2(type, rtinfo, cpv, w, lenp); 1357 } 1358 #endif 1359 1360 /* 1361 * This routine is called to generate a message from the routing 1362 * socket indicating that a redirect has occurred, a routing lookup 1363 * has failed, or that a protocol has detected timeouts to a particular 1364 * destination. 1365 */ 1366 void 1367 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 1368 int error) 1369 { 1370 struct rt_xmsghdr rtm; 1371 struct mbuf *m; 1372 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1373 struct rt_addrinfo info = *rtinfo; 1374 1375 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 1376 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1377 return; 1378 memset(&rtm, 0, sizeof(rtm)); 1379 rtm.rtm_pid = curproc->p_pid; 1380 rtm.rtm_flags = RTF_DONE | flags; 1381 rtm.rtm_errno = error; 1382 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 1383 if (m == NULL) 1384 return; 1385 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1386 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1387 } 1388 1389 /* 1390 * This routine is called to generate a message from the routing 1391 * socket indicating that the status of a network interface has changed. 1392 */ 1393 void 1394 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1395 { 1396 struct if_xmsghdr ifm; 1397 struct mbuf *m; 1398 struct rt_addrinfo info; 1399 1400 COMPATCALL(rt_ifmsg, (ifp)); 1401 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1402 return; 1403 (void)memset(&info, 0, sizeof(info)); 1404 (void)memset(&ifm, 0, sizeof(ifm)); 1405 ifm.ifm_index = ifp->if_index; 1406 ifm.ifm_flags = ifp->if_flags; 1407 ifm.ifm_data = ifp->if_data; 1408 ifm.ifm_addrs = 0; 1409 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1410 if (m == NULL) 1411 return; 1412 COMPATNAME(route_enqueue)(m, 0); 1413 #ifdef COMPAT_14 1414 compat_14_rt_oifmsg(ifp); 1415 #endif 1416 #ifdef COMPAT_50 1417 compat_50_rt_oifmsg(ifp); 1418 #endif 1419 } 1420 1421 #ifndef COMPAT_RTSOCK 1422 static int 1423 if_addrflags(struct ifaddr *ifa) 1424 { 1425 1426 switch (ifa->ifa_addr->sa_family) { 1427 #ifdef INET 1428 case AF_INET: 1429 return ((struct in_ifaddr *)ifa)->ia4_flags; 1430 #endif 1431 #ifdef INET6 1432 case AF_INET6: 1433 return ((struct in6_ifaddr *)ifa)->ia6_flags; 1434 #endif 1435 default: 1436 return 0; 1437 } 1438 } 1439 #endif 1440 1441 /* 1442 * This is called to generate messages from the routing socket 1443 * indicating a network interface has had addresses associated with it. 1444 * if we ever reverse the logic and replace messages TO the routing 1445 * socket indicate a request to configure interfaces, then it will 1446 * be unnecessary as the routing socket will automatically generate 1447 * copies of it. 1448 */ 1449 void 1450 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1451 struct rtentry *rt) 1452 { 1453 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1454 struct rt_addrinfo info; 1455 const struct sockaddr *sa; 1456 int pass; 1457 struct mbuf *m; 1458 struct ifnet *ifp; 1459 struct rt_xmsghdr rtm; 1460 struct ifa_xmsghdr ifam; 1461 int ncmd; 1462 1463 KASSERT(ifa != NULL); 1464 KASSERT(ifa->ifa_addr != NULL); 1465 ifp = ifa->ifa_ifp; 1466 #ifdef SCTP 1467 if (cmd == RTM_ADD) { 1468 sctp_add_ip_address(ifa); 1469 } else if (cmd == RTM_DELETE) { 1470 sctp_delete_ip_address(ifa); 1471 } 1472 #endif 1473 1474 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1475 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1476 return; 1477 for (pass = 1; pass < 3; pass++) { 1478 memset(&info, 0, sizeof(info)); 1479 switch (cmdpass(cmd, pass)) { 1480 case cmdpass(RTM_ADD, 1): 1481 case cmdpass(RTM_CHANGE, 1): 1482 case cmdpass(RTM_DELETE, 2): 1483 case cmdpass(RTM_NEWADDR, 1): 1484 case cmdpass(RTM_DELADDR, 1): 1485 case cmdpass(RTM_CHGADDR, 1): 1486 switch (cmd) { 1487 case RTM_ADD: 1488 ncmd = RTM_XNEWADDR; 1489 break; 1490 case RTM_DELETE: 1491 ncmd = RTM_XDELADDR; 1492 break; 1493 case RTM_CHANGE: 1494 ncmd = RTM_XCHGADDR; 1495 break; 1496 case RTM_NEWADDR: 1497 ncmd = RTM_XNEWADDR; 1498 break; 1499 case RTM_DELADDR: 1500 ncmd = RTM_XDELADDR; 1501 break; 1502 case RTM_CHGADDR: 1503 ncmd = RTM_XCHGADDR; 1504 break; 1505 default: 1506 panic("%s: unknown command %d", __func__, cmd); 1507 } 1508 #ifdef COMPAT_70 1509 compat_70_rt_newaddrmsg1(ncmd, ifa); 1510 #endif 1511 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1512 KASSERT(ifp->if_dl != NULL); 1513 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1514 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1515 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1516 memset(&ifam, 0, sizeof(ifam)); 1517 ifam.ifam_index = ifp->if_index; 1518 ifam.ifam_metric = ifa->ifa_metric; 1519 ifam.ifam_flags = ifa->ifa_flags; 1520 #ifndef COMPAT_RTSOCK 1521 ifam.ifam_pid = curproc->p_pid; 1522 ifam.ifam_addrflags = if_addrflags(ifa); 1523 #endif 1524 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1525 if (m == NULL) 1526 continue; 1527 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1528 info.rti_addrs; 1529 break; 1530 case cmdpass(RTM_ADD, 2): 1531 case cmdpass(RTM_CHANGE, 2): 1532 case cmdpass(RTM_DELETE, 1): 1533 if (rt == NULL) 1534 continue; 1535 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1536 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1537 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1538 memset(&rtm, 0, sizeof(rtm)); 1539 rtm.rtm_pid = curproc->p_pid; 1540 rtm.rtm_index = ifp->if_index; 1541 rtm.rtm_flags |= rt->rt_flags; 1542 rtm.rtm_errno = error; 1543 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1544 if (m == NULL) 1545 continue; 1546 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1547 break; 1548 default: 1549 continue; 1550 } 1551 KASSERTMSG(m != NULL, "called with wrong command"); 1552 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1553 } 1554 #undef cmdpass 1555 1556 } 1557 1558 static struct mbuf * 1559 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1560 struct rt_addrinfo *info) 1561 { 1562 struct if_xannouncemsghdr ifan; 1563 1564 memset(info, 0, sizeof(*info)); 1565 memset(&ifan, 0, sizeof(ifan)); 1566 ifan.ifan_index = ifp->if_index; 1567 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1568 ifan.ifan_what = what; 1569 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1570 } 1571 1572 /* 1573 * This is called to generate routing socket messages indicating 1574 * network interface arrival and departure. 1575 */ 1576 void 1577 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1578 { 1579 struct mbuf *m; 1580 struct rt_addrinfo info; 1581 1582 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1583 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1584 return; 1585 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1586 if (m == NULL) 1587 return; 1588 COMPATNAME(route_enqueue)(m, 0); 1589 } 1590 1591 /* 1592 * This is called to generate routing socket messages indicating 1593 * IEEE80211 wireless events. 1594 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1595 */ 1596 void 1597 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1598 size_t data_len) 1599 { 1600 struct mbuf *m; 1601 struct rt_addrinfo info; 1602 1603 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1604 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1605 return; 1606 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1607 if (m == NULL) 1608 return; 1609 /* 1610 * Append the ieee80211 data. Try to stick it in the 1611 * mbuf containing the ifannounce msg; otherwise allocate 1612 * a new mbuf and append. 1613 * 1614 * NB: we assume m is a single mbuf. 1615 */ 1616 if (data_len > M_TRAILINGSPACE(m)) { 1617 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1618 if (n == NULL) { 1619 m_freem(m); 1620 return; 1621 } 1622 (void)memcpy(mtod(n, void *), data, data_len); 1623 n->m_len = data_len; 1624 m->m_next = n; 1625 } else if (data_len > 0) { 1626 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1627 m->m_len += data_len; 1628 } 1629 if (m->m_flags & M_PKTHDR) 1630 m->m_pkthdr.len += data_len; 1631 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1632 COMPATNAME(route_enqueue)(m, 0); 1633 } 1634 1635 /* 1636 * This is used in dumping the kernel table via sysctl(). 1637 */ 1638 static int 1639 sysctl_dumpentry(struct rtentry *rt, void *v) 1640 { 1641 struct rt_walkarg *w = v; 1642 int error = 0, size; 1643 struct rt_addrinfo info; 1644 1645 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1646 return 0; 1647 memset(&info, 0, sizeof(info)); 1648 info.rti_info[RTAX_DST] = rt_getkey(rt); 1649 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1650 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1651 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1652 if (rt->rt_ifp) { 1653 const struct ifaddr *rtifa; 1654 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1655 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1656 * then rt_get_ifa() != NULL. So this ought to still be safe. 1657 * --dyoung 1658 */ 1659 rtifa = rt_get_ifa(rt); 1660 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1661 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1662 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1663 } 1664 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1665 return error; 1666 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1667 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1668 1669 rtm->rtm_flags = rt->rt_flags; 1670 rtm->rtm_use = rt->rt_use; 1671 rtm_setmetrics(rt, rtm); 1672 KASSERT(rt->rt_ifp != NULL); 1673 rtm->rtm_index = rt->rt_ifp->if_index; 1674 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1675 rtm->rtm_addrs = info.rti_addrs; 1676 if ((error = copyout(rtm, w->w_where, size)) != 0) 1677 w->w_where = NULL; 1678 else 1679 w->w_where = (char *)w->w_where + size; 1680 } 1681 return error; 1682 } 1683 1684 static int 1685 sysctl_iflist_if(struct ifnet *ifp, struct rt_walkarg *w, 1686 struct rt_addrinfo *info, size_t len) 1687 { 1688 struct if_xmsghdr *ifm; 1689 int error; 1690 1691 ifm = (struct if_xmsghdr *)w->w_tmem; 1692 ifm->ifm_index = ifp->if_index; 1693 ifm->ifm_flags = ifp->if_flags; 1694 ifm->ifm_data = ifp->if_data; 1695 ifm->ifm_addrs = info->rti_addrs; 1696 if ((error = copyout(ifm, w->w_where, len)) == 0) 1697 w->w_where = (char *)w->w_where + len; 1698 return error; 1699 } 1700 1701 static int 1702 sysctl_iflist_addr(struct rt_walkarg *w, struct ifaddr *ifa, 1703 struct rt_addrinfo *info) 1704 { 1705 int len, error; 1706 1707 if ((error = rt_msg2(RTM_XNEWADDR, info, 0, w, &len))) 1708 return error; 1709 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1710 struct ifa_xmsghdr *ifam; 1711 1712 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1713 ifam->ifam_index = ifa->ifa_ifp->if_index; 1714 ifam->ifam_flags = ifa->ifa_flags; 1715 ifam->ifam_metric = ifa->ifa_metric; 1716 ifam->ifam_addrs = info->rti_addrs; 1717 #ifndef COMPAT_RTSOCK 1718 ifam->ifam_pid = 0; 1719 ifam->ifam_addrflags = if_addrflags(ifa); 1720 #endif 1721 if ((error = copyout(w->w_tmem, w->w_where, len)) == 0) 1722 w->w_where = (char *)w->w_where + len; 1723 } 1724 return error; 1725 } 1726 1727 static int 1728 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1729 { 1730 struct ifnet *ifp; 1731 struct ifaddr *ifa; 1732 struct rt_addrinfo info; 1733 int cmd, len, error = 0; 1734 int (*iflist_if)(struct ifnet *, struct rt_walkarg *, 1735 struct rt_addrinfo *, size_t); 1736 int (*iflist_addr)(struct rt_walkarg *, struct ifaddr *, 1737 struct rt_addrinfo *); 1738 int s; 1739 struct psref psref; 1740 int bound; 1741 1742 switch (type) { 1743 case NET_RT_IFLIST: 1744 cmd = RTM_IFINFO; 1745 iflist_if = sysctl_iflist_if; 1746 iflist_addr = sysctl_iflist_addr; 1747 break; 1748 #ifdef COMPAT_14 1749 case NET_RT_OOOIFLIST: 1750 cmd = RTM_OOIFINFO; 1751 iflist_if = compat_14_iflist; 1752 iflist_addr = compat_70_iflist_addr; 1753 break; 1754 #endif 1755 #ifdef COMPAT_50 1756 case NET_RT_OOIFLIST: 1757 cmd = RTM_OIFINFO; 1758 iflist_if = compat_50_iflist; 1759 iflist_addr = compat_70_iflist_addr; 1760 break; 1761 #endif 1762 #ifdef COMPAT_70 1763 case NET_RT_OIFLIST: 1764 cmd = RTM_IFINFO; 1765 iflist_if = sysctl_iflist_if; 1766 iflist_addr = compat_70_iflist_addr; 1767 break; 1768 #endif 1769 default: 1770 #ifdef RTSOCK_DEBUG 1771 printf("%s: unsupported IFLIST type %d\n", __func__, type); 1772 #endif 1773 return EINVAL; 1774 } 1775 1776 memset(&info, 0, sizeof(info)); 1777 1778 bound = curlwp_bind(); 1779 s = pserialize_read_enter(); 1780 IFNET_READER_FOREACH(ifp) { 1781 int _s; 1782 if (w->w_arg && w->w_arg != ifp->if_index) 1783 continue; 1784 if (IFADDR_READER_EMPTY(ifp)) 1785 continue; 1786 1787 if_acquire(ifp, &psref); 1788 pserialize_read_exit(s); 1789 1790 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1791 if ((error = rt_msg2(cmd, &info, NULL, w, &len)) != 0) 1792 goto release_exit; 1793 info.rti_info[RTAX_IFP] = NULL; 1794 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1795 if ((error = iflist_if(ifp, w, &info, len)) != 0) 1796 goto release_exit; 1797 } 1798 _s = pserialize_read_enter(); 1799 IFADDR_READER_FOREACH(ifa, ifp) { 1800 struct psref _psref; 1801 if (af && af != ifa->ifa_addr->sa_family) 1802 continue; 1803 ifa_acquire(ifa, &_psref); 1804 pserialize_read_exit(_s); 1805 1806 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1807 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1808 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1809 error = iflist_addr(w, ifa, &info); 1810 1811 _s = pserialize_read_enter(); 1812 ifa_release(ifa, &_psref); 1813 if (error != 0) { 1814 pserialize_read_exit(_s); 1815 goto release_exit; 1816 } 1817 } 1818 pserialize_read_exit(_s); 1819 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1820 info.rti_info[RTAX_BRD] = NULL; 1821 1822 s = pserialize_read_enter(); 1823 if_release(ifp, &psref); 1824 } 1825 pserialize_read_exit(s); 1826 curlwp_bindx(bound); 1827 1828 return 0; 1829 1830 release_exit: 1831 if_release(ifp, &psref); 1832 curlwp_bindx(bound); 1833 return error; 1834 } 1835 1836 static int 1837 sysctl_rtable(SYSCTLFN_ARGS) 1838 { 1839 void *where = oldp; 1840 size_t *given = oldlenp; 1841 int i, s, error = EINVAL; 1842 u_char af; 1843 struct rt_walkarg w; 1844 1845 if (namelen == 1 && name[0] == CTL_QUERY) 1846 return sysctl_query(SYSCTLFN_CALL(rnode)); 1847 1848 if (newp) 1849 return EPERM; 1850 if (namelen != 3) 1851 return EINVAL; 1852 af = name[0]; 1853 w.w_tmemneeded = 0; 1854 w.w_tmemsize = 0; 1855 w.w_tmem = NULL; 1856 again: 1857 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1858 if (w.w_tmemneeded) { 1859 w.w_tmem = kmem_alloc(w.w_tmemneeded, KM_SLEEP); 1860 w.w_tmemsize = w.w_tmemneeded; 1861 w.w_tmemneeded = 0; 1862 } 1863 w.w_op = name[1]; 1864 w.w_arg = name[2]; 1865 w.w_given = *given; 1866 w.w_needed = 0 - w.w_given; 1867 w.w_where = where; 1868 1869 s = splsoftnet(); 1870 switch (w.w_op) { 1871 1872 case NET_RT_DUMP: 1873 case NET_RT_FLAGS: 1874 #ifdef INET 1875 /* 1876 * take care of llinfo entries, the caller must 1877 * specify an AF 1878 */ 1879 if (w.w_op == NET_RT_FLAGS && 1880 (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { 1881 if (af != 0) 1882 error = lltable_sysctl_dumparp(af, &w); 1883 else 1884 error = EINVAL; 1885 break; 1886 } 1887 #endif /* INET */ 1888 1889 for (i = 1; i <= AF_MAX; i++) 1890 if ((af == 0 || af == i) && 1891 (error = rt_walktree(i, sysctl_dumpentry, &w))) 1892 break; 1893 break; 1894 1895 #ifdef COMPAT_14 1896 case NET_RT_OOOIFLIST: 1897 error = sysctl_iflist(af, &w, w.w_op); 1898 break; 1899 #endif 1900 #ifdef COMPAT_50 1901 case NET_RT_OOIFLIST: 1902 error = sysctl_iflist(af, &w, w.w_op); 1903 break; 1904 #endif 1905 #ifdef COMPAT_70 1906 case NET_RT_OIFLIST: 1907 error = sysctl_iflist(af, &w, w.w_op); 1908 break; 1909 #endif 1910 case NET_RT_IFLIST: 1911 error = sysctl_iflist(af, &w, w.w_op); 1912 break; 1913 } 1914 splx(s); 1915 1916 /* check to see if we couldn't allocate memory with NOWAIT */ 1917 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1918 goto again; 1919 1920 if (w.w_tmem) 1921 kmem_free(w.w_tmem, w.w_tmemsize); 1922 w.w_needed += w.w_given; 1923 if (where) { 1924 *given = (char *)w.w_where - (char *)where; 1925 if (*given < w.w_needed) 1926 return ENOMEM; 1927 } else { 1928 *given = (11 * w.w_needed) / 10; 1929 } 1930 return error; 1931 } 1932 1933 /* 1934 * Routing message software interrupt routine 1935 */ 1936 static void 1937 COMPATNAME(route_intr)(void *cookie) 1938 { 1939 struct sockproto proto = { .sp_family = PF_XROUTE, }; 1940 struct route_info * const ri = &COMPATNAME(route_info); 1941 struct mbuf *m; 1942 1943 mutex_enter(softnet_lock); 1944 KERNEL_LOCK(1, NULL); 1945 for (;;) { 1946 IFQ_LOCK(&ri->ri_intrq); 1947 IF_DEQUEUE(&ri->ri_intrq, m); 1948 IFQ_UNLOCK(&ri->ri_intrq); 1949 if (m == NULL) 1950 break; 1951 proto.sp_protocol = M_GETCTX(m, uintptr_t); 1952 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); 1953 } 1954 KERNEL_UNLOCK_ONE(NULL); 1955 mutex_exit(softnet_lock); 1956 } 1957 1958 /* 1959 * Enqueue a message to the software interrupt routine. 1960 */ 1961 void 1962 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 1963 { 1964 struct route_info * const ri = &COMPATNAME(route_info); 1965 int wasempty; 1966 1967 IFQ_LOCK(&ri->ri_intrq); 1968 if (IF_QFULL(&ri->ri_intrq)) { 1969 IF_DROP(&ri->ri_intrq); 1970 IFQ_UNLOCK(&ri->ri_intrq); 1971 m_freem(m); 1972 } else { 1973 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 1974 M_SETCTX(m, (uintptr_t)family); 1975 IF_ENQUEUE(&ri->ri_intrq, m); 1976 IFQ_UNLOCK(&ri->ri_intrq); 1977 if (wasempty) { 1978 kpreempt_disable(); 1979 softint_schedule(ri->ri_sih); 1980 kpreempt_enable(); 1981 } 1982 } 1983 } 1984 1985 static void 1986 COMPATNAME(route_init)(void) 1987 { 1988 struct route_info * const ri = &COMPATNAME(route_info); 1989 1990 #ifndef COMPAT_RTSOCK 1991 rt_init(); 1992 #endif 1993 1994 sysctl_net_route_setup(NULL); 1995 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 1996 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 1997 COMPATNAME(route_intr), NULL); 1998 IFQ_LOCK_INIT(&ri->ri_intrq); 1999 } 2000 2001 /* 2002 * Definitions of protocols supported in the ROUTE domain. 2003 */ 2004 #ifndef COMPAT_RTSOCK 2005 PR_WRAP_USRREQS(route); 2006 #else 2007 PR_WRAP_USRREQS(compat_50_route); 2008 #endif 2009 2010 static const struct pr_usrreqs route_usrreqs = { 2011 .pr_attach = COMPATNAME(route_attach_wrapper), 2012 .pr_detach = COMPATNAME(route_detach_wrapper), 2013 .pr_accept = COMPATNAME(route_accept_wrapper), 2014 .pr_bind = COMPATNAME(route_bind_wrapper), 2015 .pr_listen = COMPATNAME(route_listen_wrapper), 2016 .pr_connect = COMPATNAME(route_connect_wrapper), 2017 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 2018 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 2019 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 2020 .pr_abort = COMPATNAME(route_abort_wrapper), 2021 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 2022 .pr_stat = COMPATNAME(route_stat_wrapper), 2023 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 2024 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 2025 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 2026 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 2027 .pr_send = COMPATNAME(route_send_wrapper), 2028 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 2029 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 2030 }; 2031 2032 static const struct protosw COMPATNAME(route_protosw)[] = { 2033 { 2034 .pr_type = SOCK_RAW, 2035 .pr_domain = &COMPATNAME(routedomain), 2036 .pr_flags = PR_ATOMIC|PR_ADDR, 2037 .pr_input = raw_input, 2038 .pr_ctlinput = raw_ctlinput, 2039 .pr_ctloutput = route_ctloutput, 2040 .pr_usrreqs = &route_usrreqs, 2041 .pr_init = raw_init, 2042 }, 2043 }; 2044 2045 struct domain COMPATNAME(routedomain) = { 2046 .dom_family = PF_XROUTE, 2047 .dom_name = DOMAINNAME, 2048 .dom_init = COMPATNAME(route_init), 2049 .dom_protosw = COMPATNAME(route_protosw), 2050 .dom_protoswNPROTOSW = 2051 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 2052 }; 2053 2054 static void 2055 sysctl_net_route_setup(struct sysctllog **clog) 2056 { 2057 const struct sysctlnode *rnode = NULL; 2058 2059 sysctl_createv(clog, 0, NULL, &rnode, 2060 CTLFLAG_PERMANENT, 2061 CTLTYPE_NODE, DOMAINNAME, 2062 SYSCTL_DESCR("PF_ROUTE information"), 2063 NULL, 0, NULL, 0, 2064 CTL_NET, PF_XROUTE, CTL_EOL); 2065 2066 sysctl_createv(clog, 0, NULL, NULL, 2067 CTLFLAG_PERMANENT, 2068 CTLTYPE_NODE, "rtable", 2069 SYSCTL_DESCR("Routing table information"), 2070 sysctl_rtable, 0, NULL, 0, 2071 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 2072 2073 sysctl_createv(clog, 0, &rnode, NULL, 2074 CTLFLAG_PERMANENT, 2075 CTLTYPE_STRUCT, "stats", 2076 SYSCTL_DESCR("Routing statistics"), 2077 NULL, 0, &rtstat, sizeof(rtstat), 2078 CTL_CREATE, CTL_EOL); 2079 } 2080
Indexes created Tue Sep 23 14:10:03 GMT 2025