1 /* $NetBSD: ip6_input.c,v 1.9 1999/12/13 15:17:22 itojun 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) 1982, 1986, 1988, 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. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)ip_input.c 8.2 (Berkeley) 1/4/94 65 */ 66 67 #ifdef __FreeBSD__ 68 #include "opt_ip6fw.h" 69 #endif 70 #if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__) 71 #include "opt_inet.h" 72 #ifdef __NetBSD__ /*XXX*/ 73 #include "opt_ipsec.h" 74 #endif 75 #endif 76 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/malloc.h> 80 #include <sys/mbuf.h> 81 #include <sys/domain.h> 82 #include <sys/protosw.h> 83 #include <sys/socket.h> 84 #include <sys/socketvar.h> 85 #include <sys/errno.h> 86 #include <sys/time.h> 87 #include <sys/kernel.h> 88 #include <sys/syslog.h> 89 #if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) 90 #include <sys/proc.h> 91 #endif 92 93 #include <net/if.h> 94 #include <net/if_types.h> 95 #include <net/if_dl.h> 96 #include <net/route.h> 97 #include <net/netisr.h> 98 99 #include <netinet/in.h> 100 #include <netinet/in_systm.h> 101 #ifdef INET 102 #include <netinet/ip.h> 103 #include <netinet/ip_icmp.h> 104 #endif /*INET*/ 105 #if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802) 106 #include <netinet/in_pcb.h> 107 #endif 108 #include <netinet6/in6_var.h> 109 #include <netinet6/ip6.h> 110 #if !((defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802)) 111 #include <netinet6/in6_pcb.h> 112 #endif 113 #include <netinet6/ip6_var.h> 114 #include <netinet6/icmp6.h> 115 #include <netinet6/in6_ifattach.h> 116 #include <netinet6/nd6.h> 117 #include <netinet6/in6_prefix.h> 118 119 #ifdef IPV6FIREWALL 120 #include <netinet6/ip6_fw.h> 121 #endif 122 123 #include <netinet6/ip6protosw.h> 124 125 /* we need it for NLOOP. */ 126 #ifndef __bsdi__ 127 #include "loop.h" 128 #endif 129 #include "faith.h" 130 131 #include "gif.h" 132 #include "bpfilter.h" 133 134 #include <net/net_osdep.h> 135 136 #ifdef __OpenBSD__ /*KAME IPSEC*/ 137 #undef IPSEC 138 #endif 139 140 extern struct domain inet6domain; 141 extern struct ip6protosw inet6sw[]; 142 #ifdef __bsdi__ 143 #if _BSDI_VERSION < 199802 144 extern struct ifnet loif; 145 #else 146 extern struct ifnet *loifp; 147 #endif 148 #endif 149 150 u_char ip6_protox[IPPROTO_MAX]; 151 static int ip6qmaxlen = IFQ_MAXLEN; 152 struct in6_ifaddr *in6_ifaddr; 153 struct ifqueue ip6intrq; 154 155 #if defined(__NetBSD__) || defined(__OpenBSD__) 156 extern struct ifnet loif[NLOOP]; 157 #endif 158 int ip6_forward_srcrt; /* XXX */ 159 int ip6_sourcecheck; /* XXX */ 160 int ip6_sourcecheck_interval; /* XXX */ 161 162 #ifdef IPV6FIREWALL 163 /* firewall hooks */ 164 ip6_fw_chk_t *ip6_fw_chk_ptr; 165 ip6_fw_ctl_t *ip6_fw_ctl_ptr; 166 #endif 167 168 struct ip6stat ip6stat; 169 170 static void ip6_init2 __P((void *)); 171 172 static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *)); 173 174 #if defined(PTR) 175 extern int ip6_protocol_tr; 176 177 int ptr_in6 __P((struct mbuf *, struct mbuf **)); 178 extern void ip_forward __P((struct mbuf *, int)); 179 #endif 180 181 /* 182 * IP6 initialization: fill in IP6 protocol switch table. 183 * All protocols not implemented in kernel go to raw IP6 protocol handler. 184 */ 185 void 186 ip6_init() 187 { 188 register struct ip6protosw *pr; 189 register int i; 190 struct timeval tv; 191 192 pr = (struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW); 193 if (pr == 0) 194 panic("ip6_init"); 195 for (i = 0; i < IPPROTO_MAX; i++) 196 ip6_protox[i] = pr - inet6sw; 197 for (pr = (struct ip6protosw *)inet6domain.dom_protosw; 198 pr < (struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++) 199 if (pr->pr_domain->dom_family == PF_INET6 && 200 pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW) 201 ip6_protox[pr->pr_protocol] = pr - inet6sw; 202 ip6intrq.ifq_maxlen = ip6qmaxlen; 203 nd6_init(); 204 frag6_init(); 205 #ifdef IPV6FIREWALL 206 ip6_fw_init(); 207 #endif 208 /* 209 * in many cases, random() here does NOT return random number 210 * as initialization during bootstrap time occur in fixed order. 211 */ 212 microtime(&tv); 213 ip6_flow_seq = random() ^ tv.tv_usec; 214 215 #ifndef __FreeBSD__ 216 ip6_init2((void *)0); 217 #endif 218 } 219 220 static void 221 ip6_init2(dummy) 222 void *dummy; 223 { 224 int ret; 225 #if defined(__bsdi__) && _BSDI_VERSION < 199802 226 struct ifnet *loifp = &loif; 227 #endif 228 229 /* get EUI64 from somewhere */ 230 ret = in6_ifattach_getifid(NULL); 231 232 /* 233 * to route local address of p2p link to loopback, 234 * assign loopback address first. 235 */ 236 #ifdef __bsdi__ 237 in6_ifattach(loifp, IN6_IFT_LOOP, NULL, 0); 238 #else 239 in6_ifattach(&loif[0], IN6_IFT_LOOP, NULL, 0); 240 #endif 241 242 /* nd6_timer_init */ 243 timeout(nd6_timer, (caddr_t)0, hz); 244 /* router renumbering prefix list maintenance */ 245 timeout(in6_rr_timer, (caddr_t)0, hz); 246 } 247 248 #ifdef __FreeBSD__ 249 /* cheat */ 250 SYSINIT(netinet6init2, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, ip6_init2, NULL); 251 #endif 252 253 /* 254 * IP6 input interrupt handling. Just pass the packet to ip6_input. 255 */ 256 void 257 ip6intr() 258 { 259 int s; 260 struct mbuf *m; 261 262 for (;;) { 263 s = splimp(); 264 IF_DEQUEUE(&ip6intrq, m); 265 splx(s); 266 if (m == 0) 267 return; 268 ip6_input(m); 269 } 270 } 271 272 #ifdef __FreeBSD__ 273 NETISR_SET(NETISR_IPV6, ip6intr); 274 #endif 275 276 extern struct route_in6 ip6_forward_rt; 277 278 void 279 ip6_input(m) 280 struct mbuf *m; 281 { 282 struct ip6_hdr *ip6; 283 int off = sizeof(struct ip6_hdr), nest; 284 u_int32_t plen; 285 u_int32_t rtalert = ~0; 286 int nxt, ours = 0; 287 struct ifnet *deliverifp = NULL; 288 #if defined(__bsdi__) && _BSDI_VERSION < 199802 289 struct ifnet *loifp = &loif; 290 #endif 291 292 #ifdef IPSEC 293 /* 294 * should the inner packet be considered authentic? 295 * see comment in ah4_input(). 296 */ 297 if (m) { 298 m->m_flags &= ~M_AUTHIPHDR; 299 m->m_flags &= ~M_AUTHIPDGM; 300 } 301 #endif 302 303 /* 304 * mbuf statistics by kazu 305 */ 306 if (m->m_flags & M_EXT) { 307 if (m->m_next) 308 ip6stat.ip6s_mext2m++; 309 else 310 ip6stat.ip6s_mext1++; 311 } else { 312 if (m->m_next) { 313 if (m->m_flags & M_LOOP) { 314 #ifdef __bsdi__ 315 ip6stat.ip6s_m2m[loifp->if_index]++; /*XXX*/ 316 #else 317 ip6stat.ip6s_m2m[loif[0].if_index]++; /*XXX*/ 318 #endif 319 } 320 else if (m->m_pkthdr.rcvif->if_index <= 31) 321 ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++; 322 else 323 ip6stat.ip6s_m2m[0]++; 324 } else 325 ip6stat.ip6s_m1++; 326 } 327 328 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive); 329 ip6stat.ip6s_total++; 330 331 #ifndef PULLDOWN_TEST 332 /* XXX is the line really necessary? */ 333 IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), /*nothing*/); 334 #endif 335 336 if (m->m_len < sizeof(struct ip6_hdr)) { 337 struct ifnet *inifp; 338 inifp = m->m_pkthdr.rcvif; 339 if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == 0) { 340 ip6stat.ip6s_toosmall++; 341 in6_ifstat_inc(inifp, ifs6_in_hdrerr); 342 return; 343 } 344 } 345 346 ip6 = mtod(m, struct ip6_hdr *); 347 348 if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { 349 ip6stat.ip6s_badvers++; 350 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr); 351 goto bad; 352 } 353 354 ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; 355 356 #ifdef IPV6FIREWALL 357 /* 358 * Check with the firewall... 359 */ 360 if (ip6_fw_chk_ptr) { 361 u_short port = 0; 362 /* If ipfw says divert, we have to just drop packet */ 363 /* use port as a dummy argument */ 364 if ((*ip6_fw_chk_ptr)(&ip6, NULL, &port, &m)) { 365 m_freem(m); 366 m = NULL; 367 } 368 if (!m) 369 return; 370 } 371 #endif 372 373 /* 374 * Scope check 375 */ 376 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) || 377 IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) { 378 ip6stat.ip6s_badscope++; 379 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); 380 goto bad; 381 } 382 if (IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src) || 383 IN6_IS_ADDR_LOOPBACK(&ip6->ip6_dst)) { 384 if (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) { 385 ours = 1; 386 deliverifp = m->m_pkthdr.rcvif; 387 goto hbhcheck; 388 } else { 389 ip6stat.ip6s_badscope++; 390 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); 391 goto bad; 392 } 393 } 394 395 if (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) { 396 if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) { 397 ours = 1; 398 deliverifp = m->m_pkthdr.rcvif; 399 goto hbhcheck; 400 } 401 } else { 402 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src)) 403 ip6->ip6_src.s6_addr16[1] 404 = htons(m->m_pkthdr.rcvif->if_index); 405 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) 406 ip6->ip6_dst.s6_addr16[1] 407 = htons(m->m_pkthdr.rcvif->if_index); 408 } 409 410 #if defined(PTR) 411 /* 412 * 413 */ 414 if (ip6_protocol_tr) 415 { 416 struct mbuf *m1 = NULL; 417 418 switch (ptr_in6(m, &m1)) 419 { 420 case IPPROTO_IP: goto mcastcheck; 421 case IPPROTO_IPV4: ip_forward(m1, 0); break; 422 case IPPROTO_IPV6: ip6_forward(m1, 0); break; 423 case IPPROTO_MAX: /* discard this packet */ 424 default: 425 } 426 427 if (m != m1) 428 m_freem(m); 429 430 return; 431 } 432 433 mcastcheck: 434 #endif 435 436 /* 437 * Multicast check 438 */ 439 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 440 struct in6_multi *in6m = 0; 441 442 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast); 443 /* 444 * See if we belong to the destination multicast group on the 445 * arrival interface. 446 */ 447 IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m); 448 if (in6m) 449 ours = 1; 450 else if (!ip6_mrouter) { 451 ip6stat.ip6s_notmember++; 452 ip6stat.ip6s_cantforward++; 453 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); 454 goto bad; 455 } 456 deliverifp = m->m_pkthdr.rcvif; 457 goto hbhcheck; 458 } 459 460 /* 461 * Unicast check 462 */ 463 if (ip6_forward_rt.ro_rt == 0 || 464 !IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 465 &ip6_forward_rt.ro_dst.sin6_addr)) { 466 if (ip6_forward_rt.ro_rt) { 467 RTFREE(ip6_forward_rt.ro_rt); 468 ip6_forward_rt.ro_rt = 0; 469 } 470 bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6)); 471 ip6_forward_rt.ro_dst.sin6_len = sizeof(struct sockaddr_in6); 472 ip6_forward_rt.ro_dst.sin6_family = AF_INET6; 473 ip6_forward_rt.ro_dst.sin6_addr = ip6->ip6_dst; 474 475 #ifdef __FreeBSD__ 476 rtalloc_ign((struct route *)&ip6_forward_rt, RTF_PRCLONING); 477 #else 478 rtalloc((struct route *)&ip6_forward_rt); 479 #endif 480 } 481 482 #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key)) 483 484 /* 485 * Accept the packet if the forwarding interface to the destination 486 * according to the routing table is the loopback interface, 487 * unless the associated route has a gateway. 488 * Note that this approach causes to accept a packet if there is a 489 * route to the loopback interface for the destination of the packet. 490 * But we think it's even useful in some situations, e.g. when using 491 * a special daemon which wants to intercept the packet. 492 */ 493 if (ip6_forward_rt.ro_rt && 494 (ip6_forward_rt.ro_rt->rt_flags & 495 (RTF_HOST|RTF_GATEWAY)) == RTF_HOST && 496 #if 0 497 /* 498 * The check below is redundant since the comparison of 499 * the destination and the key of the rtentry has 500 * already done through looking up the routing table. 501 */ 502 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, 503 &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) && 504 #endif 505 ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) { 506 struct in6_ifaddr *ia6 = 507 (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa; 508 /* packet to tentative address must not be received */ 509 if (ia6->ia6_flags & IN6_IFF_ANYCAST) 510 m->m_flags |= M_ANYCAST6; 511 if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) { 512 /* this interface is ready */ 513 ours = 1; 514 deliverifp = ia6->ia_ifp; /* correct? */ 515 goto hbhcheck; 516 } else { 517 /* this interface is not ready, fall through */ 518 } 519 } 520 521 /* 522 * FAITH(Firewall Aided Internet Translator) 523 */ 524 #if defined(NFAITH) && 0 < NFAITH 525 if (ip6_keepfaith) { 526 if (ip6_forward_rt.ro_rt && ip6_forward_rt.ro_rt->rt_ifp 527 && ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) { 528 /* XXX do we need more sanity checks? */ 529 ours = 1; 530 deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /*faith*/ 531 goto hbhcheck; 532 } 533 } 534 #endif 535 536 #if 0 537 { 538 /* 539 * Last resort: check in6_ifaddr for incoming interface. 540 * The code is here until I update the "goto ours hack" code above 541 * working right. 542 */ 543 struct ifaddr *ifa; 544 for (ifa = m->m_pkthdr.rcvif->if_addrlist.tqh_first; 545 ifa; 546 ifa = ifa->ifa_list.tqe_next) { 547 if (ifa->ifa_addr == NULL) 548 continue; /* just for safety */ 549 if (ifa->ifa_addr->sa_family != AF_INET6) 550 continue; 551 if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) { 552 ours = 1; 553 deliverifp = ifa->ifa_ifp; 554 goto hbhcheck; 555 } 556 } 557 } 558 #endif 559 560 /* 561 * Now there is no reason to process the packet if it's not our own 562 * and we're not a router. 563 */ 564 if (!ip6_forwarding) { 565 ip6stat.ip6s_cantforward++; 566 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); 567 goto bad; 568 } 569 570 hbhcheck: 571 /* 572 * Process Hop-by-Hop options header if it's contained. 573 * m may be modified in ip6_hopopts_input(). 574 * If a JumboPayload option is included, plen will also be modified. 575 */ 576 plen = (u_int32_t)ntohs(ip6->ip6_plen); 577 if (ip6->ip6_nxt == IPPROTO_HOPOPTS) { 578 struct ip6_hbh *hbh; 579 580 if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) { 581 #if 0 /*touches NULL pointer*/ 582 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); 583 #endif 584 return; /* m have already been freed */ 585 } 586 /* adjust pointer */ 587 ip6 = mtod(m, struct ip6_hdr *); 588 #ifndef PULLDOWN_TEST 589 /* ip6_hopopts_input() ensures that mbuf is contiguous */ 590 hbh = (struct ip6_hbh *)(ip6 + 1); 591 #else 592 IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr), 593 sizeof(struct ip6_hbh)); 594 if (hbh == NULL) { 595 ip6stat.ip6s_tooshort++; 596 return; 597 } 598 #endif 599 nxt = hbh->ip6h_nxt; 600 601 /* 602 * accept the packet if a router alert option is included 603 * and we act as an IPv6 router. 604 */ 605 if (rtalert != ~0 && ip6_forwarding) 606 ours = 1; 607 } else 608 nxt = ip6->ip6_nxt; 609 610 /* 611 * Check that the amount of data in the buffers 612 * is as at least much as the IPv6 header would have us expect. 613 * Trim mbufs if longer than we expect. 614 * Drop packet if shorter than we expect. 615 */ 616 if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) { 617 ip6stat.ip6s_tooshort++; 618 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated); 619 goto bad; 620 } 621 if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) { 622 if (m->m_len == m->m_pkthdr.len) { 623 m->m_len = sizeof(struct ip6_hdr) + plen; 624 m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen; 625 } else 626 m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len); 627 } 628 629 /* 630 * Forward if desirable. 631 */ 632 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 633 /* 634 * If we are acting as a multicast router, all 635 * incoming multicast packets are passed to the 636 * kernel-level multicast forwarding function. 637 * The packet is returned (relatively) intact; if 638 * ip6_mforward() returns a non-zero value, the packet 639 * must be discarded, else it may be accepted below. 640 */ 641 if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) { 642 ip6stat.ip6s_cantforward++; 643 m_freem(m); 644 return; 645 } 646 if (!ours) { 647 m_freem(m); 648 return; 649 } 650 } 651 else if (!ours) { 652 ip6_forward(m, 0); 653 return; 654 } 655 656 /* 657 * Tell launch routine the next header 658 */ 659 #if defined(__NetBSD__) && defined(IFA_STATS) 660 if (IFA_STATS && deliverifp != NULL) { 661 struct in6_ifaddr *ia6; 662 ip6 = mtod(m, struct ip6_hdr *); 663 ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); 664 if (ia6) 665 ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len; 666 } 667 #endif 668 ip6stat.ip6s_delivered++; 669 in6_ifstat_inc(deliverifp, ifs6_in_deliver); 670 nest = 0; 671 while (nxt != IPPROTO_DONE) { 672 if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) { 673 ip6stat.ip6s_toomanyhdr++; 674 goto bad; 675 } 676 677 /* 678 * protection against faulty packet - there should be 679 * more sanity checks in header chain processing. 680 */ 681 if (m->m_pkthdr.len < off) { 682 ip6stat.ip6s_tooshort++; 683 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated); 684 goto bad; 685 } 686 687 nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt); 688 } 689 return; 690 bad: 691 m_freem(m); 692 } 693 694 /* 695 * Hop-by-Hop options header processing. If a valid jumbo payload option is 696 * included, the real payload length will be stored in plenp. 697 */ 698 static int 699 ip6_hopopts_input(plenp, rtalertp, mp, offp) 700 u_int32_t *plenp; 701 u_int32_t *rtalertp; /* XXX: should be stored more smart way */ 702 struct mbuf **mp; 703 int *offp; 704 { 705 register struct mbuf *m = *mp; 706 int off = *offp, hbhlen; 707 struct ip6_hbh *hbh; 708 u_int8_t *opt; 709 710 /* validation of the length of the header */ 711 #ifndef PULLDOWN_TEST 712 IP6_EXTHDR_CHECK(m, off, sizeof(*hbh), -1); 713 hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off); 714 hbhlen = (hbh->ip6h_len + 1) << 3; 715 716 IP6_EXTHDR_CHECK(m, off, hbhlen, -1); 717 hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off); 718 #else 719 IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, 720 sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); 721 if (hbh == NULL) { 722 ip6stat.ip6s_tooshort++; 723 return -1; 724 } 725 hbhlen = (hbh->ip6h_len + 1) << 3; 726 IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr), 727 hbhlen); 728 if (hbh == NULL) { 729 ip6stat.ip6s_tooshort++; 730 return -1; 731 } 732 #endif 733 off += hbhlen; 734 hbhlen -= sizeof(struct ip6_hbh); 735 opt = (u_int8_t *)hbh + sizeof(struct ip6_hbh); 736 737 if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh), 738 hbhlen, rtalertp, plenp) < 0) 739 return(-1); 740 741 *offp = off; 742 *mp = m; 743 return(0); 744 } 745 746 /* 747 * Search header for all Hop-by-hop options and process each option. 748 * This function is separate from ip6_hopopts_input() in order to 749 * handle a case where the sending node itself process its hop-by-hop 750 * options header. In such a case, the function is called from ip6_output(). 751 */ 752 int 753 ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp) 754 struct mbuf *m; 755 u_int8_t *opthead; 756 int hbhlen; 757 u_int32_t *rtalertp; 758 u_int32_t *plenp; 759 { 760 struct ip6_hdr *ip6; 761 int optlen = 0; 762 u_int8_t *opt = opthead; 763 u_int16_t rtalert_val; 764 765 for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) { 766 switch(*opt) { 767 case IP6OPT_PAD1: 768 optlen = 1; 769 break; 770 case IP6OPT_PADN: 771 if (hbhlen < IP6OPT_MINLEN) { 772 ip6stat.ip6s_toosmall++; 773 goto bad; 774 } 775 optlen = *(opt + 1) + 2; 776 break; 777 case IP6OPT_RTALERT: 778 /* XXX may need check for alignment */ 779 if (hbhlen < IP6OPT_RTALERT_LEN) { 780 ip6stat.ip6s_toosmall++; 781 goto bad; 782 } 783 if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) 784 /* XXX: should we discard the packet? */ 785 log(LOG_ERR, "length of router alert opt is inconsitent(%d)", 786 *(opt + 1)); 787 optlen = IP6OPT_RTALERT_LEN; 788 bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2); 789 *rtalertp = ntohs(rtalert_val); 790 break; 791 case IP6OPT_JUMBO: 792 /* XXX may need check for alignment */ 793 if (hbhlen < IP6OPT_JUMBO_LEN) { 794 ip6stat.ip6s_toosmall++; 795 goto bad; 796 } 797 if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) 798 /* XXX: should we discard the packet? */ 799 log(LOG_ERR, "length of jumbopayload opt " 800 "is inconsistent(%d)", 801 *(opt + 1)); 802 optlen = IP6OPT_JUMBO_LEN; 803 804 /* 805 * We can simply cast because of the alignment 806 * requirement of the jumbo payload option. 807 */ 808 #if 0 809 *plenp = ntohl(*(u_int32_t *)(opt + 2)); 810 #else 811 bcopy(opt + 2, plenp, sizeof(*plenp)); 812 *plenp = htonl(*plenp); 813 #endif 814 if (*plenp <= IPV6_MAXPACKET) { 815 /* 816 * jumbo payload length must be larger 817 * than 65535 818 */ 819 ip6stat.ip6s_badoptions++; 820 icmp6_error(m, ICMP6_PARAM_PROB, 821 ICMP6_PARAMPROB_HEADER, 822 sizeof(struct ip6_hdr) + 823 sizeof(struct ip6_hbh) + 824 opt + 2 - opthead); 825 return(-1); 826 } 827 828 ip6 = mtod(m, struct ip6_hdr *); 829 if (ip6->ip6_plen) { 830 /* 831 * IPv6 packets that have non 0 payload length 832 * must not contain a jumbo paylod option. 833 */ 834 ip6stat.ip6s_badoptions++; 835 icmp6_error(m, ICMP6_PARAM_PROB, 836 ICMP6_PARAMPROB_HEADER, 837 sizeof(struct ip6_hdr) + 838 sizeof(struct ip6_hbh) + 839 opt - opthead); 840 return(-1); 841 } 842 break; 843 default: /* unknown option */ 844 if (hbhlen < IP6OPT_MINLEN) { 845 ip6stat.ip6s_toosmall++; 846 goto bad; 847 } 848 if ((optlen = ip6_unknown_opt(opt, m, 849 sizeof(struct ip6_hdr) + 850 sizeof(struct ip6_hbh) + 851 opt - opthead)) == -1) 852 return(-1); 853 optlen += 2; 854 break; 855 } 856 } 857 858 return(0); 859 860 bad: 861 m_freem(m); 862 return(-1); 863 } 864 865 /* 866 * Unknown option processing. 867 * The third argument `off' is the offset from the IPv6 header to the option, 868 * which is necessary if the IPv6 header the and option header and IPv6 header 869 * is not continuous in order to return an ICMPv6 error. 870 */ 871 int 872 ip6_unknown_opt(optp, m, off) 873 u_int8_t *optp; 874 struct mbuf *m; 875 int off; 876 { 877 struct ip6_hdr *ip6; 878 879 switch(IP6OPT_TYPE(*optp)) { 880 case IP6OPT_TYPE_SKIP: /* ignore the option */ 881 return((int)*(optp + 1)); 882 case IP6OPT_TYPE_DISCARD: /* silently discard */ 883 m_freem(m); 884 return(-1); 885 case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */ 886 ip6stat.ip6s_badoptions++; 887 icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off); 888 return(-1); 889 case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */ 890 ip6stat.ip6s_badoptions++; 891 ip6 = mtod(m, struct ip6_hdr *); 892 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) || 893 (m->m_flags & (M_BCAST|M_MCAST))) 894 m_freem(m); 895 else 896 icmp6_error(m, ICMP6_PARAM_PROB, 897 ICMP6_PARAMPROB_OPTION, off); 898 return(-1); 899 } 900 901 m_freem(m); /* XXX: NOTREACHED */ 902 return(-1); 903 } 904 905 /* 906 * Create the "control" list for this pcb. 907 * 908 * The routine will be called from upper layer handlers like tcp6_input(). 909 * Thus the routine assumes that the caller (tcp6_input) have already 910 * called IP6_EXTHDR_CHECK() and all the extension headers are located in the 911 * very first mbuf on the mbuf chain. 912 * We may want to add some infinite loop prevention or sanity checks for safety. 913 * (This applies only when you are using KAME mbuf chain restriction, i.e. 914 * you are using IP6_EXTHDR_CHECK() not m_pulldown()) 915 */ 916 void 917 ip6_savecontrol(in6p, mp, ip6, m) 918 #if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(HAVE_NRL_INPCB) 919 register struct inpcb *in6p; 920 #else 921 register struct in6pcb *in6p; 922 #endif 923 register struct mbuf **mp; 924 register struct ip6_hdr *ip6; 925 register struct mbuf *m; 926 { 927 #ifdef HAVE_NRL_INPCB 928 # define in6p_flags inp_flags 929 #endif 930 #if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) 931 struct proc *p = curproc; /* XXX */ 932 #endif 933 #ifdef __bsdi__ 934 # define sbcreatecontrol so_cmsg 935 #endif 936 int privileged; 937 938 privileged = 0; 939 #if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) 940 if (p && !suser(p->p_ucred, &p->p_acflag)) 941 privileged++; 942 #else 943 #ifdef HAVE_NRL_INPCB 944 if ((in6p->inp_socket->so_state & SS_PRIV) != 0) 945 privileged++; 946 #else 947 if ((in6p->in6p_socket->so_state & SS_PRIV) != 0) 948 privileged++; 949 #endif 950 #endif 951 952 #ifdef SO_TIMESTAMP 953 if (in6p->in6p_socket->so_options & SO_TIMESTAMP) { 954 struct timeval tv; 955 956 microtime(&tv); 957 *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv), 958 SCM_TIMESTAMP, SOL_SOCKET); 959 if (*mp) 960 mp = &(*mp)->m_next; 961 } 962 #endif 963 if (in6p->in6p_flags & IN6P_RECVDSTADDR) { 964 *mp = sbcreatecontrol((caddr_t) &ip6->ip6_dst, 965 sizeof(struct in6_addr), IPV6_RECVDSTADDR, 966 IPPROTO_IPV6); 967 if (*mp) 968 mp = &(*mp)->m_next; 969 } 970 971 #ifdef noyet 972 /* options were tossed above */ 973 if (in6p->in6p_flags & IN6P_RECVOPTS) 974 /* broken */ 975 /* ip6_srcroute doesn't do what we want here, need to fix */ 976 if (in6p->in6p_flags & IPV6P_RECVRETOPTS) 977 /* broken */ 978 #endif 979 980 /* RFC 2292 sec. 5 */ 981 if (in6p->in6p_flags & IN6P_PKTINFO) { 982 struct in6_pktinfo pi6; 983 bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr)); 984 if (IN6_IS_SCOPE_LINKLOCAL(&pi6.ipi6_addr)) 985 pi6.ipi6_addr.s6_addr16[1] = 0; 986 pi6.ipi6_ifindex = (m && m->m_pkthdr.rcvif) 987 ? m->m_pkthdr.rcvif->if_index 988 : 0; 989 *mp = sbcreatecontrol((caddr_t) &pi6, 990 sizeof(struct in6_pktinfo), IPV6_PKTINFO, 991 IPPROTO_IPV6); 992 if (*mp) 993 mp = &(*mp)->m_next; 994 } 995 if (in6p->in6p_flags & IN6P_HOPLIMIT) { 996 int hlim = ip6->ip6_hlim & 0xff; 997 *mp = sbcreatecontrol((caddr_t) &hlim, 998 sizeof(int), IPV6_HOPLIMIT, IPPROTO_IPV6); 999 if (*mp) 1000 mp = &(*mp)->m_next; 1001 } 1002 /* IN6P_NEXTHOP - for outgoing packet only */ 1003 1004 /* 1005 * IPV6_HOPOPTS socket option. We require super-user privilege 1006 * for the option, but it might be too strict, since there might 1007 * be some hop-by-hop options which can be returned to normal user. 1008 * See RFC 2292 section 6. 1009 */ 1010 if ((in6p->in6p_flags & IN6P_HOPOPTS) && privileged) { 1011 /* 1012 * Check if a hop-by-hop options header is contatined in the 1013 * received packet, and if so, store the options as ancillary 1014 * data. Note that a hop-by-hop options header must be 1015 * just after the IPv6 header, which fact is assured through 1016 * the IPv6 input processing. 1017 */ 1018 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1019 if (ip6->ip6_nxt == IPPROTO_HOPOPTS) { 1020 struct ip6_hbh *hbh; 1021 int hbhlen; 1022 1023 #ifndef PULLDOWN_TEST 1024 hbh = (struct ip6_hbh *)(ip6 + 1); 1025 hbhlen = (hbh->ip6h_len + 1) << 3; 1026 #else 1027 IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, 1028 sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); 1029 if (hbh == NULL) { 1030 ip6stat.ip6s_tooshort++; 1031 return; 1032 } 1033 hbhlen = (hbh->ip6h_len + 1) << 3; 1034 IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, 1035 sizeof(struct ip6_hdr), hbhlen); 1036 if (hbh == NULL) { 1037 ip6stat.ip6s_tooshort++; 1038 return; 1039 } 1040 #endif 1041 1042 /* 1043 * XXX: We copy whole the header even if a jumbo 1044 * payload option is included, which option is to 1045 * be removed before returning in the RFC 2292. 1046 * But it's too painful operation... 1047 */ 1048 *mp = sbcreatecontrol((caddr_t)hbh, hbhlen, 1049 IPV6_HOPOPTS, IPPROTO_IPV6); 1050 if (*mp) 1051 mp = &(*mp)->m_next; 1052 } 1053 } 1054 1055 /* IPV6_DSTOPTS and IPV6_RTHDR socket options */ 1056 if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) { 1057 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1058 int nxt = ip6->ip6_nxt, off = sizeof(struct ip6_hdr);; 1059 1060 /* 1061 * Search for destination options headers or routing 1062 * header(s) through the header chain, and stores each 1063 * header as ancillary data. 1064 * Note that the order of the headers remains in 1065 * the chain of ancillary data. 1066 */ 1067 while(1) { /* is explicit loop prevention necessary? */ 1068 struct ip6_ext *ip6e; 1069 int elen; 1070 1071 #ifndef PULLDOWN_TEST 1072 ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + off); 1073 if (nxt == IPPROTO_AH) 1074 elen = (ip6e->ip6e_len + 2) << 2; 1075 else 1076 elen = (ip6e->ip6e_len + 1) << 3; 1077 #else 1078 IP6_EXTHDR_GET(ip6e, struct ip6_ext *, m, off, 1079 sizeof(struct ip6_ext)); 1080 if (ip6e == NULL) { 1081 ip6stat.ip6s_tooshort++; 1082 return; 1083 } 1084 if (nxt == IPPROTO_AH) 1085 elen = (ip6e->ip6e_len + 2) << 2; 1086 else 1087 elen = (ip6e->ip6e_len + 1) << 3; 1088 IP6_EXTHDR_GET(ip6e, struct ip6_ext *, m, off, elen); 1089 if (ip6e == NULL) { 1090 ip6stat.ip6s_tooshort++; 1091 return; 1092 } 1093 #endif 1094 1095 switch(nxt) { 1096 case IPPROTO_DSTOPTS: 1097 if (!in6p->in6p_flags & IN6P_DSTOPTS) 1098 break; 1099 1100 /* 1101 * We also require super-user privilege for 1102 * the option. 1103 * See the comments on IN6_HOPOPTS. 1104 */ 1105 if (!privileged) 1106 break; 1107 1108 *mp = sbcreatecontrol((caddr_t)ip6e, elen, 1109 IPV6_DSTOPTS, 1110 IPPROTO_IPV6); 1111 if (*mp) 1112 mp = &(*mp)->m_next; 1113 break; 1114 1115 case IPPROTO_ROUTING: 1116 if (!in6p->in6p_flags & IN6P_RTHDR) 1117 break; 1118 1119 *mp = sbcreatecontrol((caddr_t)ip6e, elen, 1120 IPV6_RTHDR, 1121 IPPROTO_IPV6); 1122 if (*mp) 1123 mp = &(*mp)->m_next; 1124 break; 1125 1126 case IPPROTO_UDP: 1127 case IPPROTO_TCP: 1128 case IPPROTO_ICMPV6: 1129 default: 1130 /* 1131 * stop search if we encounter an upper 1132 * layer protocol headers. 1133 */ 1134 goto loopend; 1135 1136 case IPPROTO_HOPOPTS: 1137 case IPPROTO_AH: /* is it possible? */ 1138 break; 1139 } 1140 1141 /* proceed with the next header. */ 1142 off += elen; 1143 nxt = ip6e->ip6e_nxt; 1144 } 1145 loopend: 1146 } 1147 if ((in6p->in6p_flags & IN6P_HOPOPTS) && privileged) { 1148 /* to be done */ 1149 } 1150 if ((in6p->in6p_flags & IN6P_DSTOPTS) && privileged) { 1151 /* to be done */ 1152 } 1153 /* IN6P_RTHDR - to be done */ 1154 1155 #ifdef __bsdi__ 1156 # undef sbcreatecontrol 1157 #endif 1158 #ifdef __OpenBSD__ 1159 # undef in6p_flags 1160 #endif 1161 } 1162 1163 /* 1164 * Get pointer to the previous header followed by the header 1165 * currently processed. 1166 * XXX: This function supposes that 1167 * M includes all headers, 1168 * the next header field and the header length field of each header 1169 * are valid, and 1170 * the sum of each header length equals to OFF. 1171 * Because of these assumptions, this function must be called very 1172 * carefully. Moreover, it will not be used in the near future when 1173 * we develop `neater' mechanism to process extension headers. 1174 */ 1175 char * 1176 ip6_get_prevhdr(m, off) 1177 struct mbuf *m; 1178 int off; 1179 { 1180 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); 1181 1182 if (off == sizeof(struct ip6_hdr)) 1183 return(&ip6->ip6_nxt); 1184 else { 1185 int len, nxt; 1186 struct ip6_ext *ip6e = NULL; 1187 1188 nxt = ip6->ip6_nxt; 1189 len = sizeof(struct ip6_hdr); 1190 while (len < off) { 1191 ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len); 1192 1193 switch(nxt) { 1194 case IPPROTO_FRAGMENT: 1195 len += sizeof(struct ip6_frag); 1196 break; 1197 case IPPROTO_AH: 1198 len += (ip6e->ip6e_len + 2) << 2; 1199 break; 1200 default: 1201 len += (ip6e->ip6e_len + 1) << 3; 1202 break; 1203 } 1204 nxt = ip6e->ip6e_nxt; 1205 } 1206 if (ip6e) 1207 return(&ip6e->ip6e_nxt); 1208 else 1209 return NULL; 1210 } 1211 } 1212 1213 /* 1214 * System control for IP6 1215 */ 1216 1217 u_char inet6ctlerrmap[PRC_NCMDS] = { 1218 0, 0, 0, 0, 1219 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH, 1220 EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED, 1221 EMSGSIZE, EHOSTUNREACH, 0, 0, 1222 0, 0, 0, 0, 1223 ENOPROTOOPT 1224 }; 1225 1226 #if defined(__NetBSD__) || defined(__OpenBSD__) 1227 #include <vm/vm.h> 1228 #include <sys/sysctl.h> 1229 1230 int 1231 ip6_sysctl(name, namelen, oldp, oldlenp, newp, newlen) 1232 int *name; 1233 u_int namelen; 1234 void *oldp; 1235 size_t *oldlenp; 1236 void *newp; 1237 size_t newlen; 1238 { 1239 /* All sysctl names at this level are terminal. */ 1240 if (namelen != 1) 1241 return ENOTDIR; 1242 1243 switch (name[0]) { 1244 1245 case IPV6CTL_FORWARDING: 1246 return sysctl_int(oldp, oldlenp, newp, newlen, 1247 &ip6_forwarding); 1248 case IPV6CTL_SENDREDIRECTS: 1249 return sysctl_int(oldp, oldlenp, newp, newlen, 1250 &ip6_sendredirects); 1251 case IPV6CTL_DEFHLIM: 1252 return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_defhlim); 1253 case IPV6CTL_MAXFRAGPACKETS: 1254 return sysctl_int(oldp, oldlenp, newp, newlen, 1255 &ip6_maxfragpackets); 1256 case IPV6CTL_ACCEPT_RTADV: 1257 return sysctl_int(oldp, oldlenp, newp, newlen, 1258 &ip6_accept_rtadv); 1259 case IPV6CTL_KEEPFAITH: 1260 return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_keepfaith); 1261 case IPV6CTL_LOG_INTERVAL: 1262 return sysctl_int(oldp, oldlenp, newp, newlen, 1263 &ip6_log_interval); 1264 case IPV6CTL_HDRNESTLIMIT: 1265 return sysctl_int(oldp, oldlenp, newp, newlen, 1266 &ip6_hdrnestlimit); 1267 case IPV6CTL_DAD_COUNT: 1268 return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_dad_count); 1269 case IPV6CTL_AUTO_FLOWLABEL: 1270 return sysctl_int(oldp, oldlenp, newp, newlen, 1271 &ip6_auto_flowlabel); 1272 case IPV6CTL_DEFMCASTHLIM: 1273 return sysctl_int(oldp, oldlenp, newp, newlen, 1274 &ip6_defmcasthlim); 1275 case IPV6CTL_GIF_HLIM: 1276 return sysctl_int(oldp, oldlenp, newp, newlen, 1277 &ip6_gif_hlim); 1278 case IPV6CTL_KAME_VERSION: 1279 return sysctl_rdstring(oldp, oldlenp, newp, __KAME_VERSION); 1280 case IPV6CTL_USE_DEPRECATED: 1281 return sysctl_int(oldp, oldlenp, newp, newlen, 1282 &ip6_use_deprecated); 1283 default: 1284 return EOPNOTSUPP; 1285 } 1286 /* NOTREACHED */ 1287 } 1288 #endif /* __NetBSD__ || __OpenBSD__ */ 1289 1290 #ifdef __bsdi__ 1291 int *ip6_sysvars[] = IPV6CTL_VARS; 1292 1293 int 1294 ip6_sysctl(name, namelen, oldp, oldlenp, newp, newlen) 1295 int *name; 1296 u_int namelen; 1297 void *oldp; 1298 size_t *oldlenp; 1299 void *newp; 1300 size_t newlen; 1301 { 1302 if (name[0] >= IPV6CTL_MAXID) 1303 return (EOPNOTSUPP); 1304 1305 switch (name[0]) { 1306 case IPV6CTL_STATS: 1307 return sysctl_rdtrunc(oldp, oldlenp, newp, &ip6stat, 1308 sizeof(ip6stat)); 1309 case IPV6CTL_KAME_VERSION: 1310 return sysctl_rdstring(oldp, oldlenp, newp, __KAME_VERSION); 1311 default: 1312 return (sysctl_int_arr(ip6_sysvars, name, namelen, 1313 oldp, oldlenp, newp, newlen)); 1314 } 1315 } 1316 #endif /* __bsdi__ */ 1317