Annotation of src/sys/netinet6/ip6_input.c, Revision 1.109.8.2
1.109.8.2! dyoung 1: /* $NetBSD: ip6_input.c,v 1.109 2007/07/19 20:48:56 dyoung Exp $ */
! 2: /* $KAME: ip6_input.c,v 1.188 2001/03/29 05:34:31 itojun Exp $ */
! 3:
! 4: /*
! 5: * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. Neither the name of the project nor the names of its contributors
! 17: * may be used to endorse or promote products derived from this software
! 18: * without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
! 21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 23: * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
! 24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: */
! 32:
! 33: /*
! 34: * Copyright (c) 1982, 1986, 1988, 1993
! 35: * The Regents of the University of California. All rights reserved.
! 36: *
! 37: * Redistribution and use in source and binary forms, with or without
! 38: * modification, are permitted provided that the following conditions
! 39: * are met:
! 40: * 1. Redistributions of source code must retain the above copyright
! 41: * notice, this list of conditions and the following disclaimer.
! 42: * 2. Redistributions in binary form must reproduce the above copyright
! 43: * notice, this list of conditions and the following disclaimer in the
! 44: * documentation and/or other materials provided with the distribution.
! 45: * 3. Neither the name of the University nor the names of its contributors
! 46: * may be used to endorse or promote products derived from this software
! 47: * without specific prior written permission.
! 48: *
! 49: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 50: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 51: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 52: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 53: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 54: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 55: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 56: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 57: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 58: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 59: * SUCH DAMAGE.
! 60: *
! 61: * @(#)ip_input.c 8.2 (Berkeley) 1/4/94
! 62: */
! 63:
! 64: #include <sys/cdefs.h>
! 65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.109 2007/07/19 20:48:56 dyoung Exp $");
! 66:
! 67: #include "opt_inet.h"
! 68: #include "opt_inet6.h"
! 69: #include "opt_ipsec.h"
! 70: #include "opt_pfil_hooks.h"
! 71:
! 72: #include <sys/param.h>
! 73: #include <sys/systm.h>
! 74: #include <sys/malloc.h>
! 75: #include <sys/mbuf.h>
! 76: #include <sys/domain.h>
! 77: #include <sys/protosw.h>
! 78: #include <sys/socket.h>
! 79: #include <sys/socketvar.h>
! 80: #include <sys/errno.h>
! 81: #include <sys/time.h>
! 82: #include <sys/kernel.h>
! 83: #include <sys/syslog.h>
! 84: #include <sys/proc.h>
! 85: #include <sys/sysctl.h>
! 86:
! 87: #include <net/if.h>
! 88: #include <net/if_types.h>
! 89: #include <net/if_dl.h>
! 90: #include <net/route.h>
! 91: #include <net/netisr.h>
! 92: #ifdef PFIL_HOOKS
! 93: #include <net/pfil.h>
! 94: #endif
! 95:
! 96: #include <netinet/in.h>
! 97: #include <netinet/in_systm.h>
! 98: #ifdef INET
! 99: #include <netinet/ip.h>
! 100: #include <netinet/ip_icmp.h>
! 101: #endif /* INET */
! 102: #include <netinet/ip6.h>
! 103: #include <netinet6/in6_var.h>
! 104: #include <netinet6/ip6_var.h>
! 105: #include <netinet6/in6_pcb.h>
! 106: #include <netinet/icmp6.h>
! 107: #include <netinet6/scope6_var.h>
! 108: #include <netinet6/in6_ifattach.h>
! 109: #include <netinet6/nd6.h>
! 110:
! 111: #ifdef IPSEC
! 112: #include <netinet6/ipsec.h>
! 113: #endif
! 114:
! 115: #ifdef FAST_IPSEC
! 116: #include <netipsec/ipsec.h>
! 117: #include <netipsec/ipsec6.h>
! 118: #include <netipsec/key.h>
! 119: #endif /* FAST_IPSEC */
! 120:
! 121: #include <netinet6/ip6protosw.h>
! 122:
! 123: #include "faith.h"
! 124: #include "gif.h"
! 125:
! 126: #if NGIF > 0
! 127: #include <netinet6/in6_gif.h>
! 128: #endif
! 129:
! 130: #include <net/net_osdep.h>
! 131:
! 132: extern struct domain inet6domain;
! 133:
! 134: u_char ip6_protox[IPPROTO_MAX];
! 135: static int ip6qmaxlen = IFQ_MAXLEN;
! 136: struct in6_ifaddr *in6_ifaddr;
! 137: struct ifqueue ip6intrq;
! 138:
! 139: extern callout_t in6_tmpaddrtimer_ch;
! 140:
! 141: int ip6_forward_srcrt; /* XXX */
! 142: int ip6_sourcecheck; /* XXX */
! 143: int ip6_sourcecheck_interval; /* XXX */
! 144:
! 145: #ifdef PFIL_HOOKS
! 146: struct pfil_head inet6_pfil_hook;
! 147: #endif
! 148:
! 149: struct ip6stat ip6stat;
! 150:
! 151: static void ip6_init2 __P((void *));
! 152: static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *));
! 153:
! 154: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
! 155: static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));
! 156:
! 157: /*
! 158: * IP6 initialization: fill in IP6 protocol switch table.
! 159: * All protocols not implemented in kernel go to raw IP6 protocol handler.
! 160: */
! 161: void
! 162: ip6_init()
! 163: {
! 164: const struct ip6protosw *pr;
! 165: int i;
! 166:
! 167: pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
! 168: if (pr == 0)
! 169: panic("ip6_init");
! 170: for (i = 0; i < IPPROTO_MAX; i++)
! 171: ip6_protox[i] = pr - inet6sw;
! 172: for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
! 173: pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
! 174: if (pr->pr_domain->dom_family == PF_INET6 &&
! 175: pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW)
! 176: ip6_protox[pr->pr_protocol] = pr - inet6sw;
! 177: ip6intrq.ifq_maxlen = ip6qmaxlen;
! 178: scope6_init();
! 179: addrsel_policy_init();
! 180: nd6_init();
! 181: frag6_init();
! 182: ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR;
! 183:
! 184: ip6_init2((void *)0);
! 185: #ifdef GATEWAY
! 186: ip6flow_init(ip6_hashsize);
! 187: #endif
! 188:
! 189: #ifdef PFIL_HOOKS
! 190: /* Register our Packet Filter hook. */
! 191: inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
! 192: inet6_pfil_hook.ph_af = AF_INET6;
! 193: i = pfil_head_register(&inet6_pfil_hook);
! 194: if (i != 0)
! 195: printf("ip6_init: WARNING: unable to register pfil hook, "
! 196: "error %d\n", i);
! 197: #endif /* PFIL_HOOKS */
! 198: }
! 199:
! 200: static void
! 201: ip6_init2(void *dummy)
! 202: {
! 203:
! 204: /* nd6_timer_init */
! 205: callout_init(&nd6_timer_ch, 0);
! 206: callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
! 207:
! 208: /* timer for regeneranation of temporary addresses randomize ID */
! 209: callout_init(&in6_tmpaddrtimer_ch, 0);
! 210: callout_reset(&in6_tmpaddrtimer_ch,
! 211: (ip6_temp_preferred_lifetime - ip6_desync_factor -
! 212: ip6_temp_regen_advance) * hz,
! 213: in6_tmpaddrtimer, NULL);
! 214: }
! 215:
! 216: /*
! 217: * IP6 input interrupt handling. Just pass the packet to ip6_input.
! 218: */
! 219: void
! 220: ip6intr()
! 221: {
! 222: int s;
! 223: struct mbuf *m;
! 224:
! 225: for (;;) {
! 226: s = splnet();
! 227: IF_DEQUEUE(&ip6intrq, m);
! 228: splx(s);
! 229: if (m == 0)
! 230: return;
! 231: /* drop the packet if IPv6 operation is disabled on the IF */
! 232: if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) {
! 233: m_freem(m);
! 234: return;
! 235: }
! 236: ip6_input(m);
! 237: }
! 238: }
! 239:
! 240: extern struct route ip6_forward_rt;
! 241:
! 242: void
! 243: ip6_input(struct mbuf *m)
! 244: {
! 245: struct ip6_hdr *ip6;
! 246: int hit, off = sizeof(struct ip6_hdr), nest;
! 247: u_int32_t plen;
! 248: u_int32_t rtalert = ~0;
! 249: int nxt, ours = 0, rh_present = 0;
! 250: struct ifnet *deliverifp = NULL;
! 251: int srcrt = 0;
! 252: const struct rtentry *rt;
! 253: union {
! 254: struct sockaddr dst;
! 255: struct sockaddr_in6 dst6;
! 256: } u;
! 257: #ifdef FAST_IPSEC
! 258: struct m_tag *mtag;
! 259: struct tdb_ident *tdbi;
! 260: struct secpolicy *sp;
! 261: int s, error;
! 262: #endif
! 263:
! 264: #ifdef IPSEC
! 265: /*
! 266: * should the inner packet be considered authentic?
! 267: * see comment in ah4_input().
! 268: */
! 269: m->m_flags &= ~M_AUTHIPHDR;
! 270: m->m_flags &= ~M_AUTHIPDGM;
! 271: #endif
! 272:
! 273: /*
! 274: * make sure we don't have onion peering information into m_tag.
! 275: */
! 276: ip6_delaux(m);
! 277:
! 278: /*
! 279: * mbuf statistics
! 280: */
! 281: if (m->m_flags & M_EXT) {
! 282: if (m->m_next)
! 283: ip6stat.ip6s_mext2m++;
! 284: else
! 285: ip6stat.ip6s_mext1++;
! 286: } else {
! 287: #define M2MMAX __arraycount(ip6stat.ip6s_m2m)
! 288: if (m->m_next) {
! 289: if (m->m_flags & M_LOOP) {
! 290: ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
! 291: } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
! 292: ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
! 293: else
! 294: ip6stat.ip6s_m2m[0]++;
! 295: } else
! 296: ip6stat.ip6s_m1++;
! 297: #undef M2MMAX
! 298: }
! 299:
! 300: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
! 301: ip6stat.ip6s_total++;
! 302:
! 303: /*
! 304: * If the IPv6 header is not aligned, slurp it up into a new
! 305: * mbuf with space for link headers, in the event we forward
! 306: * it. Otherwise, if it is aligned, make sure the entire base
! 307: * IPv6 header is in the first mbuf of the chain.
! 308: */
! 309: if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
! 310: struct ifnet *inifp = m->m_pkthdr.rcvif;
! 311: if ((m = m_copyup(m, sizeof(struct ip6_hdr),
! 312: (max_linkhdr + 3) & ~3)) == NULL) {
! 313: /* XXXJRT new stat, please */
! 314: ip6stat.ip6s_toosmall++;
! 315: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
! 316: return;
! 317: }
! 318: } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
! 319: struct ifnet *inifp = m->m_pkthdr.rcvif;
! 320: if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
! 321: ip6stat.ip6s_toosmall++;
! 322: in6_ifstat_inc(inifp, ifs6_in_hdrerr);
! 323: return;
! 324: }
! 325: }
! 326:
! 327: ip6 = mtod(m, struct ip6_hdr *);
! 328:
! 329: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
! 330: ip6stat.ip6s_badvers++;
! 331: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
! 332: goto bad;
! 333: }
! 334:
! 335: #if defined(IPSEC)
! 336: /* IPv6 fast forwarding is not compatible with IPsec. */
! 337: m->m_flags &= ~M_CANFASTFWD;
! 338: #else
! 339: /*
! 340: * Assume that we can create a fast-forward IP flow entry
! 341: * based on this packet.
! 342: */
! 343: m->m_flags |= M_CANFASTFWD;
! 344: #endif
! 345:
! 346: #ifdef PFIL_HOOKS
! 347: /*
! 348: * Run through list of hooks for input packets. If there are any
! 349: * filters which require that additional packets in the flow are
! 350: * not fast-forwarded, they must clear the M_CANFASTFWD flag.
! 351: * Note that filters must _never_ set this flag, as another filter
! 352: * in the list may have previously cleared it.
! 353: */
! 354: /*
! 355: * let ipfilter look at packet on the wire,
! 356: * not the decapsulated packet.
! 357: */
! 358: #ifdef IPSEC
! 359: if (!ipsec_getnhist(m))
! 360: #elif defined(FAST_IPSEC)
! 361: if (!ipsec_indone(m))
! 362: #else
! 363: if (1)
! 364: #endif
! 365: {
! 366: struct in6_addr odst;
! 367:
! 368: odst = ip6->ip6_dst;
! 369: if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
! 370: PFIL_IN) != 0)
! 371: return;
! 372: if (m == NULL)
! 373: return;
! 374: ip6 = mtod(m, struct ip6_hdr *);
! 375: srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
! 376: }
! 377: #endif /* PFIL_HOOKS */
! 378:
! 379: ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
! 380:
! 381: #ifdef ALTQ
! 382: if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
! 383: /* packet is dropped by traffic conditioner */
! 384: return;
! 385: }
! 386: #endif
! 387:
! 388: /*
! 389: * Check against address spoofing/corruption.
! 390: */
! 391: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
! 392: IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
! 393: /*
! 394: * XXX: "badscope" is not very suitable for a multicast source.
! 395: */
! 396: ip6stat.ip6s_badscope++;
! 397: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
! 398: goto bad;
! 399: }
! 400: /*
! 401: * The following check is not documented in specs. A malicious
! 402: * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
! 403: * and bypass security checks (act as if it was from 127.0.0.1 by using
! 404: * IPv6 src ::ffff:127.0.0.1). Be cautious.
! 405: *
! 406: * This check chokes if we are in an SIIT cloud. As none of BSDs
! 407: * support IPv4-less kernel compilation, we cannot support SIIT
! 408: * environment at all. So, it makes more sense for us to reject any
! 409: * malicious packets for non-SIIT environment, than try to do a
! 410: * partial support for SIIT environment.
! 411: */
! 412: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
! 413: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
! 414: ip6stat.ip6s_badscope++;
! 415: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
! 416: goto bad;
! 417: }
! 418: #if 0
! 419: /*
! 420: * Reject packets with IPv4 compatible addresses (auto tunnel).
! 421: *
! 422: * The code forbids auto tunnel relay case in RFC1933 (the check is
! 423: * stronger than RFC1933). We may want to re-enable it if mech-xx
! 424: * is revised to forbid relaying case.
! 425: */
! 426: if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
! 427: IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
! 428: ip6stat.ip6s_badscope++;
! 429: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
! 430: goto bad;
! 431: }
! 432: #endif
! 433:
! 434: /*
! 435: * Disambiguate address scope zones (if there is ambiguity).
! 436: * We first make sure that the original source or destination address
! 437: * is not in our internal form for scoped addresses. Such addresses
! 438: * are not necessarily invalid spec-wise, but we cannot accept them due
! 439: * to the usage conflict.
! 440: * in6_setscope() then also checks and rejects the cases where src or
! 441: * dst are the loopback address and the receiving interface
! 442: * is not loopback.
! 443: */
! 444: if (__predict_false(
! 445: m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
! 446: goto bad;
! 447: ip6 = mtod(m, struct ip6_hdr *);
! 448: if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
! 449: ip6stat.ip6s_badscope++; /* XXX */
! 450: goto bad;
! 451: }
! 452: if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
! 453: in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
! 454: ip6stat.ip6s_badscope++;
! 455: goto bad;
! 456: }
! 457:
! 458: /*
! 459: * Multicast check
! 460: */
! 461: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
! 462: struct in6_multi *in6m = 0;
! 463:
! 464: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
! 465: /*
! 466: * See if we belong to the destination multicast group on the
! 467: * arrival interface.
! 468: */
! 469: IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
! 470: if (in6m)
! 471: ours = 1;
! 472: else if (!ip6_mrouter) {
! 473: ip6stat.ip6s_notmember++;
! 474: ip6stat.ip6s_cantforward++;
! 475: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
! 476: goto bad;
! 477: }
! 478: deliverifp = m->m_pkthdr.rcvif;
! 479: goto hbhcheck;
! 480: }
! 481:
! 482: sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0);
! 483:
! 484: /*
! 485: * Unicast check
! 486: */
! 487: rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit);
! 488: if (hit)
! 489: ip6stat.ip6s_forward_cachehit++;
! 490: else
! 491: ip6stat.ip6s_forward_cachemiss++;
! 492:
! 493: #define rt6_getkey(__rt) satocsin6(rt_getkey(__rt))
! 494:
! 495: /*
! 496: * Accept the packet if the forwarding interface to the destination
! 497: * according to the routing table is the loopback interface,
! 498: * unless the associated route has a gateway.
! 499: * Note that this approach causes to accept a packet if there is a
! 500: * route to the loopback interface for the destination of the packet.
! 501: * But we think it's even useful in some situations, e.g. when using
! 502: * a special daemon which wants to intercept the packet.
! 503: */
! 504: if (rt != NULL &&
! 505: (rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
! 506: !(rt->rt_flags & RTF_CLONED) &&
! 507: #if 0
! 508: /*
! 509: * The check below is redundant since the comparison of
! 510: * the destination and the key of the rtentry has
! 511: * already done through looking up the routing table.
! 512: */
! 513: IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) &&
! 514: #endif
! 515: rt->rt_ifp->if_type == IFT_LOOP) {
! 516: struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa;
! 517: if (ia6->ia6_flags & IN6_IFF_ANYCAST)
! 518: m->m_flags |= M_ANYCAST6;
! 519: /*
! 520: * packets to a tentative, duplicated, or somehow invalid
! 521: * address must not be accepted.
! 522: */
! 523: if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
! 524: /* this address is ready */
! 525: ours = 1;
! 526: deliverifp = ia6->ia_ifp; /* correct? */
! 527: goto hbhcheck;
! 528: } else {
! 529: /* address is not ready, so discard the packet. */
! 530: nd6log((LOG_INFO,
! 531: "ip6_input: packet to an unready address %s->%s\n",
! 532: ip6_sprintf(&ip6->ip6_src),
! 533: ip6_sprintf(&ip6->ip6_dst)));
! 534:
! 535: goto bad;
! 536: }
! 537: }
! 538:
! 539: /*
! 540: * FAITH (Firewall Aided Internet Translator)
! 541: */
! 542: #if defined(NFAITH) && 0 < NFAITH
! 543: if (ip6_keepfaith) {
! 544: if (rt != NULL && rt->rt_ifp != NULL &&
! 545: rt->rt_ifp->if_type == IFT_FAITH) {
! 546: /* XXX do we need more sanity checks? */
! 547: ours = 1;
! 548: deliverifp = rt->rt_ifp; /* faith */
! 549: goto hbhcheck;
! 550: }
! 551: }
! 552: #endif
! 553:
! 554: #if 0
! 555: {
! 556: /*
! 557: * Last resort: check in6_ifaddr for incoming interface.
! 558: * The code is here until I update the "goto ours hack" code above
! 559: * working right.
! 560: */
! 561: struct ifaddr *ifa;
! 562: TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) {
! 563: if (ifa->ifa_addr == NULL)
! 564: continue; /* just for safety */
! 565: if (ifa->ifa_addr->sa_family != AF_INET6)
! 566: continue;
! 567: if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
! 568: ours = 1;
! 569: deliverifp = ifa->ifa_ifp;
! 570: goto hbhcheck;
! 571: }
! 572: }
! 573: }
! 574: #endif
! 575:
! 576: /*
! 577: * Now there is no reason to process the packet if it's not our own
! 578: * and we're not a router.
! 579: */
! 580: if (!ip6_forwarding) {
! 581: ip6stat.ip6s_cantforward++;
! 582: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
! 583: goto bad;
! 584: }
! 585:
! 586: hbhcheck:
! 587: /*
! 588: * record address information into m_tag, if we don't have one yet.
! 589: * note that we are unable to record it, if the address is not listed
! 590: * as our interface address (e.g. multicast addresses, addresses
! 591: * within FAITH prefixes and such).
! 592: */
! 593: if (deliverifp && !ip6_getdstifaddr(m)) {
! 594: struct in6_ifaddr *ia6;
! 595:
! 596: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
! 597: if (ia6) {
! 598: if (!ip6_setdstifaddr(m, ia6)) {
! 599: /*
! 600: * XXX maybe we should drop the packet here,
! 601: * as we could not provide enough information
! 602: * to the upper layers.
! 603: */
! 604: }
! 605: }
! 606: }
! 607:
! 608: /*
! 609: * Process Hop-by-Hop options header if it's contained.
! 610: * m may be modified in ip6_hopopts_input().
! 611: * If a JumboPayload option is included, plen will also be modified.
! 612: */
! 613: plen = (u_int32_t)ntohs(ip6->ip6_plen);
! 614: if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
! 615: struct ip6_hbh *hbh;
! 616:
! 617: if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
! 618: #if 0 /*touches NULL pointer*/
! 619: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
! 620: #endif
! 621: return; /* m have already been freed */
! 622: }
! 623:
! 624: /* adjust pointer */
! 625: ip6 = mtod(m, struct ip6_hdr *);
! 626:
! 627: /*
! 628: * if the payload length field is 0 and the next header field
! 629: * indicates Hop-by-Hop Options header, then a Jumbo Payload
! 630: * option MUST be included.
! 631: */
! 632: if (ip6->ip6_plen == 0 && plen == 0) {
! 633: /*
! 634: * Note that if a valid jumbo payload option is
! 635: * contained, ip6_hopopts_input() must set a valid
! 636: * (non-zero) payload length to the variable plen.
! 637: */
! 638: ip6stat.ip6s_badoptions++;
! 639: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
! 640: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
! 641: icmp6_error(m, ICMP6_PARAM_PROB,
! 642: ICMP6_PARAMPROB_HEADER,
! 643: (char *)&ip6->ip6_plen - (char *)ip6);
! 644: return;
! 645: }
! 646: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
! 647: sizeof(struct ip6_hbh));
! 648: if (hbh == NULL) {
! 649: ip6stat.ip6s_tooshort++;
! 650: return;
! 651: }
! 652: KASSERT(IP6_HDR_ALIGNED_P(hbh));
! 653: nxt = hbh->ip6h_nxt;
! 654:
! 655: /*
! 656: * accept the packet if a router alert option is included
! 657: * and we act as an IPv6 router.
! 658: */
! 659: if (rtalert != ~0 && ip6_forwarding)
! 660: ours = 1;
! 661: } else
! 662: nxt = ip6->ip6_nxt;
! 663:
! 664: /*
! 665: * Check that the amount of data in the buffers
! 666: * is as at least much as the IPv6 header would have us expect.
! 667: * Trim mbufs if longer than we expect.
! 668: * Drop packet if shorter than we expect.
! 669: */
! 670: if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
! 671: ip6stat.ip6s_tooshort++;
! 672: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
! 673: goto bad;
! 674: }
! 675: if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
! 676: if (m->m_len == m->m_pkthdr.len) {
! 677: m->m_len = sizeof(struct ip6_hdr) + plen;
! 678: m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
! 679: } else
! 680: m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
! 681: }
! 682:
! 683: /*
! 684: * Forward if desirable.
! 685: */
! 686: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
! 687: /*
! 688: * If we are acting as a multicast router, all
! 689: * incoming multicast packets are passed to the
! 690: * kernel-level multicast forwarding function.
! 691: * The packet is returned (relatively) intact; if
! 692: * ip6_mforward() returns a non-zero value, the packet
! 693: * must be discarded, else it may be accepted below.
! 694: */
! 695: if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
! 696: ip6stat.ip6s_cantforward++;
! 697: m_freem(m);
! 698: return;
! 699: }
! 700: if (!ours) {
! 701: m_freem(m);
! 702: return;
! 703: }
! 704: } else if (!ours) {
! 705: ip6_forward(m, srcrt);
! 706: return;
! 707: }
! 708:
! 709: ip6 = mtod(m, struct ip6_hdr *);
! 710:
! 711: /*
! 712: * Malicious party may be able to use IPv4 mapped addr to confuse
! 713: * tcp/udp stack and bypass security checks (act as if it was from
! 714: * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious.
! 715: *
! 716: * For SIIT end node behavior, you may want to disable the check.
! 717: * However, you will become vulnerable to attacks using IPv4 mapped
! 718: * source.
! 719: */
! 720: if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
! 721: IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
! 722: ip6stat.ip6s_badscope++;
! 723: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
! 724: goto bad;
! 725: }
! 726:
! 727: /*
! 728: * Tell launch routine the next header
! 729: */
! 730: #ifdef IFA_STATS
! 731: if (deliverifp != NULL) {
! 732: struct in6_ifaddr *ia6;
! 733: ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
! 734: if (ia6)
! 735: ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
! 736: }
! 737: #endif
! 738: ip6stat.ip6s_delivered++;
! 739: in6_ifstat_inc(deliverifp, ifs6_in_deliver);
! 740: nest = 0;
! 741:
! 742: rh_present = 0;
! 743: while (nxt != IPPROTO_DONE) {
! 744: if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
! 745: ip6stat.ip6s_toomanyhdr++;
! 746: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
! 747: goto bad;
! 748: }
! 749:
! 750: /*
! 751: * protection against faulty packet - there should be
! 752: * more sanity checks in header chain processing.
! 753: */
! 754: if (m->m_pkthdr.len < off) {
! 755: ip6stat.ip6s_tooshort++;
! 756: in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
! 757: goto bad;
! 758: }
! 759:
! 760: if (nxt == IPPROTO_ROUTING) {
! 761: if (rh_present++) {
! 762: in6_ifstat_inc(m->m_pkthdr.rcvif,
! 763: ifs6_in_hdrerr);
! 764: ip6stat.ip6s_badoptions++;
! 765: goto bad;
! 766: }
! 767: }
! 768:
! 769: #ifdef IPSEC
! 770: /*
! 771: * enforce IPsec policy checking if we are seeing last header.
! 772: * note that we do not visit this with protocols with pcb layer
! 773: * code - like udp/tcp/raw ip.
! 774: */
! 775: if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
! 776: ipsec6_in_reject(m, NULL)) {
! 777: ipsec6stat.in_polvio++;
! 778: goto bad;
! 779: }
! 780: #endif
! 781: #ifdef FAST_IPSEC
! 782: /*
! 783: * enforce IPsec policy checking if we are seeing last header.
! 784: * note that we do not visit this with protocols with pcb layer
! 785: * code - like udp/tcp/raw ip.
! 786: */
! 787: if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
! 788: /*
! 789: * Check if the packet has already had IPsec processing
! 790: * done. If so, then just pass it along. This tag gets
! 791: * set during AH, ESP, etc. input handling, before the
! 792: * packet is returned to the ip input queue for delivery.
! 793: */
! 794: mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
! 795: s = splsoftnet();
! 796: if (mtag != NULL) {
! 797: tdbi = (struct tdb_ident *)(mtag + 1);
! 798: sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
! 799: } else {
! 800: sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
! 801: IP_FORWARDING, &error);
! 802: }
! 803: if (sp != NULL) {
! 804: /*
! 805: * Check security policy against packet attributes.
! 806: */
! 807: error = ipsec_in_reject(sp, m);
! 808: KEY_FREESP(&sp);
! 809: } else {
! 810: /* XXX error stat??? */
! 811: error = EINVAL;
! 812: DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
! 813: goto bad;
! 814: }
! 815: splx(s);
! 816: if (error)
! 817: goto bad;
! 818: }
! 819: #endif /* FAST_IPSEC */
! 820:
! 821:
! 822: nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
! 823: }
! 824: return;
! 825: bad:
! 826: m_freem(m);
! 827: }
! 828:
! 829: /*
! 830: * set/grab in6_ifaddr correspond to IPv6 destination address.
! 831: */
! 832: static struct m_tag *
! 833: ip6_setdstifaddr(struct mbuf *m, struct in6_ifaddr *ia6)
! 834: {
! 835: struct m_tag *mtag;
! 836:
! 837: mtag = ip6_addaux(m);
! 838: if (mtag)
! 839: ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
! 840: return mtag; /* NULL if failed to set */
! 841: }
! 842:
! 843: struct in6_ifaddr *
! 844: ip6_getdstifaddr(struct mbuf *m)
! 845: {
! 846: struct m_tag *mtag;
! 847:
! 848: mtag = ip6_findaux(m);
! 849: if (mtag)
! 850: return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
! 851: else
! 852: return NULL;
! 853: }
! 854:
! 855: /*
! 856: * Hop-by-Hop options header processing. If a valid jumbo payload option is
! 857: * included, the real payload length will be stored in plenp.
! 858: *
! 859: * rtalertp - XXX: should be stored more smart way
! 860: */
! 861: static int
! 862: ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp,
! 863: struct mbuf **mp, int *offp)
! 864: {
! 865: struct mbuf *m = *mp;
! 866: int off = *offp, hbhlen;
! 867: struct ip6_hbh *hbh;
! 868:
! 869: /* validation of the length of the header */
! 870: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
! 871: sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
! 872: if (hbh == NULL) {
! 873: ip6stat.ip6s_tooshort++;
! 874: return -1;
! 875: }
! 876: hbhlen = (hbh->ip6h_len + 1) << 3;
! 877: IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
! 878: hbhlen);
! 879: if (hbh == NULL) {
! 880: ip6stat.ip6s_tooshort++;
! 881: return -1;
! 882: }
! 883: KASSERT(IP6_HDR_ALIGNED_P(hbh));
! 884: off += hbhlen;
! 885: hbhlen -= sizeof(struct ip6_hbh);
! 886:
! 887: if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
! 888: hbhlen, rtalertp, plenp) < 0)
! 889: return (-1);
! 890:
! 891: *offp = off;
! 892: *mp = m;
! 893: return (0);
! 894: }
! 895:
! 896: /*
! 897: * Search header for all Hop-by-hop options and process each option.
! 898: * This function is separate from ip6_hopopts_input() in order to
! 899: * handle a case where the sending node itself process its hop-by-hop
! 900: * options header. In such a case, the function is called from ip6_output().
! 901: *
! 902: * The function assumes that hbh header is located right after the IPv6 header
! 903: * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
! 904: * opthead + hbhlen is located in continuous memory region.
! 905: */
! 906: int
! 907: ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen,
! 908: u_int32_t *rtalertp, u_int32_t *plenp)
! 909: {
! 910: struct ip6_hdr *ip6;
! 911: int optlen = 0;
! 912: u_int8_t *opt = opthead;
! 913: u_int16_t rtalert_val;
! 914: u_int32_t jumboplen;
! 915: const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
! 916:
! 917: for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
! 918: switch (*opt) {
! 919: case IP6OPT_PAD1:
! 920: optlen = 1;
! 921: break;
! 922: case IP6OPT_PADN:
! 923: if (hbhlen < IP6OPT_MINLEN) {
! 924: ip6stat.ip6s_toosmall++;
! 925: goto bad;
! 926: }
! 927: optlen = *(opt + 1) + 2;
! 928: break;
! 929: case IP6OPT_RTALERT:
! 930: /* XXX may need check for alignment */
! 931: if (hbhlen < IP6OPT_RTALERT_LEN) {
! 932: ip6stat.ip6s_toosmall++;
! 933: goto bad;
! 934: }
! 935: if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
! 936: /* XXX stat */
! 937: icmp6_error(m, ICMP6_PARAM_PROB,
! 938: ICMP6_PARAMPROB_HEADER,
! 939: erroff + opt + 1 - opthead);
! 940: return (-1);
! 941: }
! 942: optlen = IP6OPT_RTALERT_LEN;
! 943: bcopy((void *)(opt + 2), (void *)&rtalert_val, 2);
! 944: *rtalertp = ntohs(rtalert_val);
! 945: break;
! 946: case IP6OPT_JUMBO:
! 947: /* XXX may need check for alignment */
! 948: if (hbhlen < IP6OPT_JUMBO_LEN) {
! 949: ip6stat.ip6s_toosmall++;
! 950: goto bad;
! 951: }
! 952: if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
! 953: /* XXX stat */
! 954: icmp6_error(m, ICMP6_PARAM_PROB,
! 955: ICMP6_PARAMPROB_HEADER,
! 956: erroff + opt + 1 - opthead);
! 957: return (-1);
! 958: }
! 959: optlen = IP6OPT_JUMBO_LEN;
! 960:
! 961: /*
! 962: * IPv6 packets that have non 0 payload length
! 963: * must not contain a jumbo payload option.
! 964: */
! 965: ip6 = mtod(m, struct ip6_hdr *);
! 966: if (ip6->ip6_plen) {
! 967: ip6stat.ip6s_badoptions++;
! 968: icmp6_error(m, ICMP6_PARAM_PROB,
! 969: ICMP6_PARAMPROB_HEADER,
! 970: erroff + opt - opthead);
! 971: return (-1);
! 972: }
! 973:
! 974: /*
! 975: * We may see jumbolen in unaligned location, so
! 976: * we'd need to perform bcopy().
! 977: */
! 978: bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
! 979: jumboplen = (u_int32_t)htonl(jumboplen);
! 980:
! 981: #if 1
! 982: /*
! 983: * if there are multiple jumbo payload options,
! 984: * *plenp will be non-zero and the packet will be
! 985: * rejected.
! 986: * the behavior may need some debate in ipngwg -
! 987: * multiple options does not make sense, however,
! 988: * there's no explicit mention in specification.
! 989: */
! 990: if (*plenp != 0) {
! 991: ip6stat.ip6s_badoptions++;
! 992: icmp6_error(m, ICMP6_PARAM_PROB,
! 993: ICMP6_PARAMPROB_HEADER,
! 994: erroff + opt + 2 - opthead);
! 995: return (-1);
! 996: }
! 997: #endif
! 998:
! 999: /*
! 1000: * jumbo payload length must be larger than 65535.
! 1001: */
! 1002: if (jumboplen <= IPV6_MAXPACKET) {
! 1003: ip6stat.ip6s_badoptions++;
! 1004: icmp6_error(m, ICMP6_PARAM_PROB,
! 1005: ICMP6_PARAMPROB_HEADER,
! 1006: erroff + opt + 2 - opthead);
! 1007: return (-1);
! 1008: }
! 1009: *plenp = jumboplen;
! 1010:
! 1011: break;
! 1012: default: /* unknown option */
! 1013: if (hbhlen < IP6OPT_MINLEN) {
! 1014: ip6stat.ip6s_toosmall++;
! 1015: goto bad;
! 1016: }
! 1017: optlen = ip6_unknown_opt(opt, m,
! 1018: erroff + opt - opthead);
! 1019: if (optlen == -1)
! 1020: return (-1);
! 1021: optlen += 2;
! 1022: break;
! 1023: }
! 1024: }
! 1025:
! 1026: return (0);
! 1027:
! 1028: bad:
! 1029: m_freem(m);
! 1030: return (-1);
! 1031: }
! 1032:
! 1033: /*
! 1034: * Unknown option processing.
! 1035: * The third argument `off' is the offset from the IPv6 header to the option,
! 1036: * which is necessary if the IPv6 header the and option header and IPv6 header
! 1037: * is not continuous in order to return an ICMPv6 error.
! 1038: */
! 1039: int
! 1040: ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off)
! 1041: {
! 1042: struct ip6_hdr *ip6;
! 1043:
! 1044: switch (IP6OPT_TYPE(*optp)) {
! 1045: case IP6OPT_TYPE_SKIP: /* ignore the option */
! 1046: return ((int)*(optp + 1));
! 1047: case IP6OPT_TYPE_DISCARD: /* silently discard */
! 1048: m_freem(m);
! 1049: return (-1);
! 1050: case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
! 1051: ip6stat.ip6s_badoptions++;
! 1052: icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
! 1053: return (-1);
! 1054: case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
! 1055: ip6stat.ip6s_badoptions++;
! 1056: ip6 = mtod(m, struct ip6_hdr *);
! 1057: if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
! 1058: (m->m_flags & (M_BCAST|M_MCAST)))
! 1059: m_freem(m);
! 1060: else
! 1061: icmp6_error(m, ICMP6_PARAM_PROB,
! 1062: ICMP6_PARAMPROB_OPTION, off);
! 1063: return (-1);
! 1064: }
! 1065:
! 1066: m_freem(m); /* XXX: NOTREACHED */
! 1067: return (-1);
! 1068: }
! 1069:
! 1070: /*
! 1071: * Create the "control" list for this pcb.
! 1072: *
! 1073: * The routine will be called from upper layer handlers like tcp6_input().
! 1074: * Thus the routine assumes that the caller (tcp6_input) have already
! 1075: * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
! 1076: * very first mbuf on the mbuf chain.
! 1077: * We may want to add some infinite loop prevention or sanity checks for safety.
! 1078: * (This applies only when you are using KAME mbuf chain restriction, i.e.
! 1079: * you are using IP6_EXTHDR_CHECK() not m_pulldown())
! 1080: */
! 1081: void
! 1082: ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp,
! 1083: struct ip6_hdr *ip6, struct mbuf *m)
! 1084: {
! 1085: #ifdef RFC2292
! 1086: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
! 1087: #else
! 1088: #define IS2292(x, y) (y)
! 1089: #endif
! 1090:
! 1091: #ifdef SO_TIMESTAMP
! 1092: if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
! 1093: struct timeval tv;
! 1094:
! 1095: microtime(&tv);
! 1096: *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
! 1097: SCM_TIMESTAMP, SOL_SOCKET);
! 1098: if (*mp)
! 1099: mp = &(*mp)->m_next;
! 1100: }
! 1101: #endif
! 1102:
! 1103: /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
! 1104: if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
! 1105: return;
! 1106:
! 1107: /* RFC 2292 sec. 5 */
! 1108: if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
! 1109: struct in6_pktinfo pi6;
! 1110:
! 1111: bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
! 1112: in6_clearscope(&pi6.ipi6_addr); /* XXX */
! 1113: pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
! 1114: m->m_pkthdr.rcvif->if_index : 0;
! 1115: *mp = sbcreatecontrol((void *) &pi6,
! 1116: sizeof(struct in6_pktinfo),
! 1117: IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
! 1118: if (*mp)
! 1119: mp = &(*mp)->m_next;
! 1120: }
! 1121:
! 1122: if (in6p->in6p_flags & IN6P_HOPLIMIT) {
! 1123: int hlim = ip6->ip6_hlim & 0xff;
! 1124:
! 1125: *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
! 1126: IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
! 1127: if (*mp)
! 1128: mp = &(*mp)->m_next;
! 1129: }
! 1130:
! 1131: if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
! 1132: u_int32_t flowinfo;
! 1133: int tclass;
! 1134:
! 1135: flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
! 1136: flowinfo >>= 20;
! 1137:
! 1138: tclass = flowinfo & 0xff;
! 1139: *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
! 1140: IPV6_TCLASS, IPPROTO_IPV6);
! 1141:
! 1142: if (*mp)
! 1143: mp = &(*mp)->m_next;
! 1144: }
! 1145:
! 1146: /*
! 1147: * IPV6_HOPOPTS socket option. Recall that we required super-user
! 1148: * privilege for the option (see ip6_ctloutput), but it might be too
! 1149: * strict, since there might be some hop-by-hop options which can be
! 1150: * returned to normal user.
! 1151: * See also RFC3542 section 8 (or RFC2292 section 6).
! 1152: */
! 1153: if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
! 1154: /*
! 1155: * Check if a hop-by-hop options header is contatined in the
! 1156: * received packet, and if so, store the options as ancillary
! 1157: * data. Note that a hop-by-hop options header must be
! 1158: * just after the IPv6 header, which fact is assured through
! 1159: * the IPv6 input processing.
! 1160: */
! 1161: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
! 1162: if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
! 1163: struct ip6_hbh *hbh;
! 1164: int hbhlen;
! 1165: struct mbuf *ext;
! 1166:
! 1167: ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
! 1168: xip6->ip6_nxt);
! 1169: if (ext == NULL) {
! 1170: ip6stat.ip6s_tooshort++;
! 1171: return;
! 1172: }
! 1173: hbh = mtod(ext, struct ip6_hbh *);
! 1174: hbhlen = (hbh->ip6h_len + 1) << 3;
! 1175: if (hbhlen != ext->m_len) {
! 1176: m_freem(ext);
! 1177: ip6stat.ip6s_tooshort++;
! 1178: return;
! 1179: }
! 1180:
! 1181: /*
! 1182: * XXX: We copy whole the header even if a jumbo
! 1183: * payload option is included, which option is to
! 1184: * be removed before returning in the RFC 2292.
! 1185: * Note: this constraint is removed in RFC3542.
! 1186: */
! 1187: *mp = sbcreatecontrol((void *)hbh, hbhlen,
! 1188: IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
! 1189: IPPROTO_IPV6);
! 1190: if (*mp)
! 1191: mp = &(*mp)->m_next;
! 1192: m_freem(ext);
! 1193: }
! 1194: }
! 1195:
! 1196: /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
! 1197: if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
! 1198: struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
! 1199: int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
! 1200:
! 1201: /*
! 1202: * Search for destination options headers or routing
! 1203: * header(s) through the header chain, and stores each
! 1204: * header as ancillary data.
! 1205: * Note that the order of the headers remains in
! 1206: * the chain of ancillary data.
! 1207: */
! 1208: for (;;) { /* is explicit loop prevention necessary? */
! 1209: struct ip6_ext *ip6e = NULL;
! 1210: int elen;
! 1211: struct mbuf *ext = NULL;
! 1212:
! 1213: /*
! 1214: * if it is not an extension header, don't try to
! 1215: * pull it from the chain.
! 1216: */
! 1217: switch (nxt) {
! 1218: case IPPROTO_DSTOPTS:
! 1219: case IPPROTO_ROUTING:
! 1220: case IPPROTO_HOPOPTS:
! 1221: case IPPROTO_AH: /* is it possible? */
! 1222: break;
! 1223: default:
! 1224: goto loopend;
! 1225: }
! 1226:
! 1227: ext = ip6_pullexthdr(m, off, nxt);
! 1228: if (ext == NULL) {
! 1229: ip6stat.ip6s_tooshort++;
! 1230: return;
! 1231: }
! 1232: ip6e = mtod(ext, struct ip6_ext *);
! 1233: if (nxt == IPPROTO_AH)
! 1234: elen = (ip6e->ip6e_len + 2) << 2;
! 1235: else
! 1236: elen = (ip6e->ip6e_len + 1) << 3;
! 1237: if (elen != ext->m_len) {
! 1238: m_freem(ext);
! 1239: ip6stat.ip6s_tooshort++;
! 1240: return;
! 1241: }
! 1242: KASSERT(IP6_HDR_ALIGNED_P(ip6e));
! 1243:
! 1244: switch (nxt) {
! 1245: case IPPROTO_DSTOPTS:
! 1246: if (!in6p->in6p_flags & IN6P_DSTOPTS)
! 1247: break;
! 1248:
! 1249: *mp = sbcreatecontrol((void *)ip6e, elen,
! 1250: IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
! 1251: IPPROTO_IPV6);
! 1252: if (*mp)
! 1253: mp = &(*mp)->m_next;
! 1254: break;
! 1255:
! 1256: case IPPROTO_ROUTING:
! 1257: if (!in6p->in6p_flags & IN6P_RTHDR)
! 1258: break;
! 1259:
! 1260: *mp = sbcreatecontrol((void *)ip6e, elen,
! 1261: IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
! 1262: IPPROTO_IPV6);
! 1263: if (*mp)
! 1264: mp = &(*mp)->m_next;
! 1265: break;
! 1266:
! 1267: case IPPROTO_HOPOPTS:
! 1268: case IPPROTO_AH: /* is it possible? */
! 1269: break;
! 1270:
! 1271: default:
! 1272: /*
! 1273: * other cases have been filtered in the above.
! 1274: * none will visit this case. here we supply
! 1275: * the code just in case (nxt overwritten or
! 1276: * other cases).
! 1277: */
! 1278: m_freem(ext);
! 1279: goto loopend;
! 1280:
! 1281: }
! 1282:
! 1283: /* proceed with the next header. */
! 1284: off += elen;
! 1285: nxt = ip6e->ip6e_nxt;
! 1286: ip6e = NULL;
! 1287: m_freem(ext);
! 1288: ext = NULL;
! 1289: }
! 1290: loopend:
! 1291: ;
! 1292: }
! 1293: }
! 1294: #undef IS2292
! 1295:
! 1296:
! 1297: void
! 1298: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
! 1299: uint32_t *mtu)
! 1300: {
! 1301: struct socket *so;
! 1302: struct mbuf *m_mtu;
! 1303: struct ip6_mtuinfo mtuctl;
! 1304:
! 1305: so = in6p->in6p_socket;
! 1306:
! 1307: if (mtu == NULL)
! 1308: return;
! 1309:
! 1310: #ifdef DIAGNOSTIC
! 1311: if (so == NULL) /* I believe this is impossible */
! 1312: panic("ip6_notify_pmtu: socket is NULL");
! 1313: #endif
! 1314:
! 1315: memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */
! 1316: mtuctl.ip6m_mtu = *mtu;
! 1317: mtuctl.ip6m_addr = *dst;
! 1318: if (sa6_recoverscope(&mtuctl.ip6m_addr))
! 1319: return;
! 1320:
! 1321: if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
! 1322: IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
! 1323: return;
! 1324:
! 1325: if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
! 1326: == 0) {
! 1327: m_freem(m_mtu);
! 1328: /* XXX: should count statistics */
! 1329: } else
! 1330: sorwakeup(so);
! 1331:
! 1332: return;
! 1333: }
! 1334:
! 1335: /*
! 1336: * pull single extension header from mbuf chain. returns single mbuf that
! 1337: * contains the result, or NULL on error.
! 1338: */
! 1339: static struct mbuf *
! 1340: ip6_pullexthdr(struct mbuf *m, size_t off, int nxt)
! 1341: {
! 1342: struct ip6_ext ip6e;
! 1343: size_t elen;
! 1344: struct mbuf *n;
! 1345:
! 1346: #ifdef DIAGNOSTIC
! 1347: switch (nxt) {
! 1348: case IPPROTO_DSTOPTS:
! 1349: case IPPROTO_ROUTING:
! 1350: case IPPROTO_HOPOPTS:
! 1351: case IPPROTO_AH: /* is it possible? */
! 1352: break;
! 1353: default:
! 1354: printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
! 1355: }
! 1356: #endif
! 1357:
! 1358: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
! 1359: if (nxt == IPPROTO_AH)
! 1360: elen = (ip6e.ip6e_len + 2) << 2;
! 1361: else
! 1362: elen = (ip6e.ip6e_len + 1) << 3;
! 1363:
! 1364: MGET(n, M_DONTWAIT, MT_DATA);
! 1365: if (n && elen >= MLEN) {
! 1366: MCLGET(n, M_DONTWAIT);
! 1367: if ((n->m_flags & M_EXT) == 0) {
! 1368: m_free(n);
! 1369: n = NULL;
! 1370: }
! 1371: }
! 1372: if (!n)
! 1373: return NULL;
! 1374:
! 1375: n->m_len = 0;
! 1376: if (elen >= M_TRAILINGSPACE(n)) {
! 1377: m_free(n);
! 1378: return NULL;
! 1379: }
! 1380:
! 1381: m_copydata(m, off, elen, mtod(n, void *));
! 1382: n->m_len = elen;
! 1383: return n;
! 1384: }
! 1385:
! 1386: /*
! 1387: * Get pointer to the previous header followed by the header
! 1388: * currently processed.
! 1389: * XXX: This function supposes that
! 1390: * M includes all headers,
! 1391: * the next header field and the header length field of each header
! 1392: * are valid, and
! 1393: * the sum of each header length equals to OFF.
! 1394: * Because of these assumptions, this function must be called very
! 1395: * carefully. Moreover, it will not be used in the near future when
! 1396: * we develop `neater' mechanism to process extension headers.
! 1397: */
! 1398: u_int8_t *
! 1399: ip6_get_prevhdr(struct mbuf *m, int off)
! 1400: {
! 1401: struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
! 1402:
! 1403: if (off == sizeof(struct ip6_hdr))
! 1404: return (&ip6->ip6_nxt);
! 1405: else {
! 1406: int len, nxt;
! 1407: struct ip6_ext *ip6e = NULL;
! 1408:
! 1409: nxt = ip6->ip6_nxt;
! 1410: len = sizeof(struct ip6_hdr);
! 1411: while (len < off) {
! 1412: ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
! 1413:
! 1414: switch (nxt) {
! 1415: case IPPROTO_FRAGMENT:
! 1416: len += sizeof(struct ip6_frag);
! 1417: break;
! 1418: case IPPROTO_AH:
! 1419: len += (ip6e->ip6e_len + 2) << 2;
! 1420: break;
! 1421: default:
! 1422: len += (ip6e->ip6e_len + 1) << 3;
! 1423: break;
! 1424: }
! 1425: nxt = ip6e->ip6e_nxt;
! 1426: }
! 1427: if (ip6e)
! 1428: return (&ip6e->ip6e_nxt);
! 1429: else
! 1430: return NULL;
! 1431: }
! 1432: }
! 1433:
! 1434: /*
! 1435: * get next header offset. m will be retained.
! 1436: */
! 1437: int
! 1438: ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp)
! 1439: {
! 1440: struct ip6_hdr ip6;
! 1441: struct ip6_ext ip6e;
! 1442: struct ip6_frag fh;
! 1443:
! 1444: /* just in case */
! 1445: if (m == NULL)
! 1446: panic("ip6_nexthdr: m == NULL");
! 1447: if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
! 1448: return -1;
! 1449:
! 1450: switch (proto) {
! 1451: case IPPROTO_IPV6:
! 1452: /* do not chase beyond intermediate IPv6 headers */
! 1453: if (off != 0)
! 1454: return -1;
! 1455: if (m->m_pkthdr.len < off + sizeof(ip6))
! 1456: return -1;
! 1457: m_copydata(m, off, sizeof(ip6), (void *)&ip6);
! 1458: if (nxtp)
! 1459: *nxtp = ip6.ip6_nxt;
! 1460: off += sizeof(ip6);
! 1461: return off;
! 1462:
! 1463: case IPPROTO_FRAGMENT:
! 1464: /*
! 1465: * terminate parsing if it is not the first fragment,
! 1466: * it does not make sense to parse through it.
! 1467: */
! 1468: if (m->m_pkthdr.len < off + sizeof(fh))
! 1469: return -1;
! 1470: m_copydata(m, off, sizeof(fh), (void *)&fh);
! 1471: if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
! 1472: return -1;
! 1473: if (nxtp)
! 1474: *nxtp = fh.ip6f_nxt;
! 1475: off += sizeof(struct ip6_frag);
! 1476: return off;
! 1477:
! 1478: case IPPROTO_AH:
! 1479: if (m->m_pkthdr.len < off + sizeof(ip6e))
! 1480: return -1;
! 1481: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
! 1482: if (nxtp)
! 1483: *nxtp = ip6e.ip6e_nxt;
! 1484: off += (ip6e.ip6e_len + 2) << 2;
! 1485: if (m->m_pkthdr.len < off)
! 1486: return -1;
! 1487: return off;
! 1488:
! 1489: case IPPROTO_HOPOPTS:
! 1490: case IPPROTO_ROUTING:
! 1491: case IPPROTO_DSTOPTS:
! 1492: if (m->m_pkthdr.len < off + sizeof(ip6e))
! 1493: return -1;
! 1494: m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
! 1495: if (nxtp)
! 1496: *nxtp = ip6e.ip6e_nxt;
! 1497: off += (ip6e.ip6e_len + 1) << 3;
! 1498: if (m->m_pkthdr.len < off)
! 1499: return -1;
! 1500: return off;
! 1501:
! 1502: case IPPROTO_NONE:
! 1503: case IPPROTO_ESP:
! 1504: case IPPROTO_IPCOMP:
! 1505: /* give up */
! 1506: return -1;
! 1507:
! 1508: default:
! 1509: return -1;
! 1510: }
! 1511: }
! 1512:
! 1513: /*
! 1514: * get offset for the last header in the chain. m will be kept untainted.
! 1515: */
! 1516: int
! 1517: ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp)
! 1518: {
! 1519: int newoff;
! 1520: int nxt;
! 1521:
! 1522: if (!nxtp) {
! 1523: nxt = -1;
! 1524: nxtp = &nxt;
! 1525: }
! 1526: for (;;) {
! 1527: newoff = ip6_nexthdr(m, off, proto, nxtp);
! 1528: if (newoff < 0)
! 1529: return off;
! 1530: else if (newoff < off)
! 1531: return -1; /* invalid */
! 1532: else if (newoff == off)
! 1533: return newoff;
! 1534:
! 1535: off = newoff;
! 1536: proto = *nxtp;
! 1537: }
! 1538: }
! 1539:
! 1540: struct m_tag *
! 1541: ip6_addaux(struct mbuf *m)
! 1542: {
! 1543: struct m_tag *mtag;
! 1544:
! 1545: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
! 1546: if (!mtag) {
! 1547: mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
! 1548: M_NOWAIT);
! 1549: if (mtag) {
! 1550: m_tag_prepend(m, mtag);
! 1551: bzero(mtag + 1, sizeof(struct ip6aux));
! 1552: }
! 1553: }
! 1554: return mtag;
! 1555: }
! 1556:
! 1557: struct m_tag *
! 1558: ip6_findaux(struct mbuf *m)
! 1559: {
! 1560: struct m_tag *mtag;
! 1561:
! 1562: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
! 1563: return mtag;
! 1564: }
! 1565:
! 1566: void
! 1567: ip6_delaux(struct mbuf *m)
! 1568: {
! 1569: struct m_tag *mtag;
! 1570:
! 1571: mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
! 1572: if (mtag)
! 1573: m_tag_delete(m, mtag);
! 1574: }
! 1575:
! 1576: #ifdef GATEWAY
! 1577: /*
! 1578: * sysctl helper routine for net.inet.ip6.maxflows. Since
! 1579: * we could reduce this value, call ip6flow_reap();
! 1580: */
! 1581: static int
! 1582: sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS)
! 1583: {
! 1584: int s;
! 1585:
! 1586: s = sysctl_lookup(SYSCTLFN_CALL(rnode));
! 1587: if (s || newp == NULL)
! 1588: return (s);
! 1589:
! 1590: s = splsoftnet();
! 1591: ip6flow_reap(0);
! 1592: splx(s);
! 1593:
! 1594: return (0);
! 1595: }
! 1596:
! 1597: static int
! 1598: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
! 1599: {
! 1600: int error, tmp;
! 1601: struct sysctlnode node;
! 1602:
! 1603: node = *rnode;
! 1604: tmp = ip6_hashsize;
! 1605: node.sysctl_data = &tmp;
! 1606: error = sysctl_lookup(SYSCTLFN_CALL(&node));
! 1607: if (error || newp == NULL)
! 1608: return (error);
! 1609:
! 1610: if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
! 1611: /*
! 1612: * Can only fail due to malloc()
! 1613: */
! 1614: if (ip6flow_invalidate_all(tmp))
! 1615: return ENOMEM;
! 1616: } else {
! 1617: /*
! 1618: * EINVAL if not a power of 2
! 1619: */
! 1620: return EINVAL;
! 1621: }
! 1622:
! 1623: return (0);
! 1624: }
! 1625: #endif /* GATEWAY */
! 1626:
! 1627: /*
! 1628: * System control for IP6
! 1629: */
! 1630:
! 1631: u_char inet6ctlerrmap[PRC_NCMDS] = {
! 1632: 0, 0, 0, 0,
! 1633: 0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH,
! 1634: EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED,
! 1635: EMSGSIZE, EHOSTUNREACH, 0, 0,
! 1636: 0, 0, 0, 0,
! 1637: ENOPROTOOPT
! 1638: };
! 1639:
! 1640: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
! 1641: {
! 1642: #ifdef RFC2292
! 1643: #define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
! 1644: #else
! 1645: #define IS2292(x, y) (y)
! 1646: #endif
! 1647:
! 1648: sysctl_createv(clog, 0, NULL, NULL,
! 1649: CTLFLAG_PERMANENT,
! 1650: CTLTYPE_NODE, "net", NULL,
! 1651: NULL, 0, NULL, 0,
! 1652: CTL_NET, CTL_EOL);
! 1653: sysctl_createv(clog, 0, NULL, NULL,
! 1654: CTLFLAG_PERMANENT,
! 1655: CTLTYPE_NODE, "inet6",
! 1656: SYSCTL_DESCR("PF_INET6 related settings"),
! 1657: NULL, 0, NULL, 0,
! 1658: CTL_NET, PF_INET6, CTL_EOL);
! 1659: sysctl_createv(clog, 0, NULL, NULL,
! 1660: CTLFLAG_PERMANENT,
! 1661: CTLTYPE_NODE, "ip6",
! 1662: SYSCTL_DESCR("IPv6 related settings"),
! 1663: NULL, 0, NULL, 0,
! 1664: CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
! 1665:
! 1666: sysctl_createv(clog, 0, NULL, NULL,
! 1667: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1668: CTLTYPE_INT, "forwarding",
! 1669: SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
! 1670: NULL, 0, &ip6_forwarding, 0,
! 1671: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1672: IPV6CTL_FORWARDING, CTL_EOL);
! 1673: sysctl_createv(clog, 0, NULL, NULL,
! 1674: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1675: CTLTYPE_INT, "redirect",
! 1676: SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
! 1677: NULL, 0, &ip6_sendredirects, 0,
! 1678: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1679: IPV6CTL_SENDREDIRECTS, CTL_EOL);
! 1680: sysctl_createv(clog, 0, NULL, NULL,
! 1681: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1682: CTLTYPE_INT, "hlim",
! 1683: SYSCTL_DESCR("Hop limit for an INET6 datagram"),
! 1684: NULL, 0, &ip6_defhlim, 0,
! 1685: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1686: IPV6CTL_DEFHLIM, CTL_EOL);
! 1687: #ifdef notyet
! 1688: sysctl_createv(clog, 0, NULL, NULL,
! 1689: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1690: CTLTYPE_INT, "mtu", NULL,
! 1691: NULL, 0, &, 0,
! 1692: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1693: IPV6CTL_DEFMTU, CTL_EOL);
! 1694: #endif
! 1695: #ifdef __no_idea__
! 1696: sysctl_createv(clog, 0, NULL, NULL,
! 1697: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1698: CTLTYPE_INT, "forwsrcrt", NULL,
! 1699: NULL, 0, &?, 0,
! 1700: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1701: IPV6CTL_FORWSRCRT, CTL_EOL);
! 1702: sysctl_createv(clog, 0, NULL, NULL,
! 1703: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1704: CTLTYPE_STRUCT, "mrtstats", NULL,
! 1705: NULL, 0, &?, sizeof(?),
! 1706: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1707: IPV6CTL_MRTSTATS, CTL_EOL);
! 1708: sysctl_createv(clog, 0, NULL, NULL,
! 1709: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1710: CTLTYPE_?, "mrtproto", NULL,
! 1711: NULL, 0, &?, sizeof(?),
! 1712: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1713: IPV6CTL_MRTPROTO, CTL_EOL);
! 1714: #endif
! 1715: sysctl_createv(clog, 0, NULL, NULL,
! 1716: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1717: CTLTYPE_INT, "maxfragpackets",
! 1718: SYSCTL_DESCR("Maximum number of fragments to buffer "
! 1719: "for reassembly"),
! 1720: NULL, 0, &ip6_maxfragpackets, 0,
! 1721: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1722: IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
! 1723: #ifdef __no_idea__
! 1724: sysctl_createv(clog, 0, NULL, NULL,
! 1725: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1726: CTLTYPE_INT, "sourcecheck", NULL,
! 1727: NULL, 0, &?, 0,
! 1728: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1729: IPV6CTL_SOURCECHECK, CTL_EOL);
! 1730: sysctl_createv(clog, 0, NULL, NULL,
! 1731: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1732: CTLTYPE_INT, "sourcecheck_logint", NULL,
! 1733: NULL, 0, &?, 0,
! 1734: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1735: IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
! 1736: #endif
! 1737: sysctl_createv(clog, 0, NULL, NULL,
! 1738: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1739: CTLTYPE_INT, "accept_rtadv",
! 1740: SYSCTL_DESCR("Accept router advertisements"),
! 1741: NULL, 0, &ip6_accept_rtadv, 0,
! 1742: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1743: IPV6CTL_ACCEPT_RTADV, CTL_EOL);
! 1744: sysctl_createv(clog, 0, NULL, NULL,
! 1745: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1746: CTLTYPE_INT, "keepfaith",
! 1747: SYSCTL_DESCR("Activate faith interface"),
! 1748: NULL, 0, &ip6_keepfaith, 0,
! 1749: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1750: IPV6CTL_KEEPFAITH, CTL_EOL);
! 1751: sysctl_createv(clog, 0, NULL, NULL,
! 1752: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1753: CTLTYPE_INT, "log_interval",
! 1754: SYSCTL_DESCR("Minumum interval between logging "
! 1755: "unroutable packets"),
! 1756: NULL, 0, &ip6_log_interval, 0,
! 1757: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1758: IPV6CTL_LOG_INTERVAL, CTL_EOL);
! 1759: sysctl_createv(clog, 0, NULL, NULL,
! 1760: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1761: CTLTYPE_INT, "hdrnestlimit",
! 1762: SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
! 1763: NULL, 0, &ip6_hdrnestlimit, 0,
! 1764: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1765: IPV6CTL_HDRNESTLIMIT, CTL_EOL);
! 1766: sysctl_createv(clog, 0, NULL, NULL,
! 1767: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1768: CTLTYPE_INT, "dad_count",
! 1769: SYSCTL_DESCR("Number of Duplicate Address Detection "
! 1770: "probes to send"),
! 1771: NULL, 0, &ip6_dad_count, 0,
! 1772: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1773: IPV6CTL_DAD_COUNT, CTL_EOL);
! 1774: sysctl_createv(clog, 0, NULL, NULL,
! 1775: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1776: CTLTYPE_INT, "auto_flowlabel",
! 1777: SYSCTL_DESCR("Assign random IPv6 flow labels"),
! 1778: NULL, 0, &ip6_auto_flowlabel, 0,
! 1779: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1780: IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
! 1781: sysctl_createv(clog, 0, NULL, NULL,
! 1782: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1783: CTLTYPE_INT, "defmcasthlim",
! 1784: SYSCTL_DESCR("Default multicast hop limit"),
! 1785: NULL, 0, &ip6_defmcasthlim, 0,
! 1786: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1787: IPV6CTL_DEFMCASTHLIM, CTL_EOL);
! 1788: #if NGIF > 0
! 1789: sysctl_createv(clog, 0, NULL, NULL,
! 1790: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1791: CTLTYPE_INT, "gifhlim",
! 1792: SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
! 1793: NULL, 0, &ip6_gif_hlim, 0,
! 1794: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1795: IPV6CTL_GIF_HLIM, CTL_EOL);
! 1796: #endif /* NGIF */
! 1797: sysctl_createv(clog, 0, NULL, NULL,
! 1798: CTLFLAG_PERMANENT,
! 1799: CTLTYPE_STRING, "kame_version",
! 1800: SYSCTL_DESCR("KAME Version"),
! 1801: NULL, 0, __UNCONST(__KAME_VERSION), 0,
! 1802: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1803: IPV6CTL_KAME_VERSION, CTL_EOL);
! 1804: sysctl_createv(clog, 0, NULL, NULL,
! 1805: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1806: CTLTYPE_INT, "use_deprecated",
! 1807: SYSCTL_DESCR("Allow use of deprecated addresses as "
! 1808: "source addresses"),
! 1809: NULL, 0, &ip6_use_deprecated, 0,
! 1810: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1811: IPV6CTL_USE_DEPRECATED, CTL_EOL);
! 1812: sysctl_createv(clog, 0, NULL, NULL,
! 1813: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1814: CTLTYPE_INT, "rr_prune", NULL,
! 1815: NULL, 0, &ip6_rr_prune, 0,
! 1816: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1817: IPV6CTL_RR_PRUNE, CTL_EOL);
! 1818: sysctl_createv(clog, 0, NULL, NULL,
! 1819: CTLFLAG_PERMANENT
! 1820: #ifndef INET6_BINDV6ONLY
! 1821: |CTLFLAG_READWRITE,
! 1822: #endif
! 1823: CTLTYPE_INT, "v6only",
! 1824: SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
! 1825: "to PF_INET sockets"),
! 1826: NULL, 0, &ip6_v6only, 0,
! 1827: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1828: IPV6CTL_V6ONLY, CTL_EOL);
! 1829: sysctl_createv(clog, 0, NULL, NULL,
! 1830: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1831: CTLTYPE_INT, "anonportmin",
! 1832: SYSCTL_DESCR("Lowest ephemeral port number to assign"),
! 1833: sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
! 1834: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1835: IPV6CTL_ANONPORTMIN, CTL_EOL);
! 1836: sysctl_createv(clog, 0, NULL, NULL,
! 1837: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1838: CTLTYPE_INT, "anonportmax",
! 1839: SYSCTL_DESCR("Highest ephemeral port number to assign"),
! 1840: sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
! 1841: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1842: IPV6CTL_ANONPORTMAX, CTL_EOL);
! 1843: #ifndef IPNOPRIVPORTS
! 1844: sysctl_createv(clog, 0, NULL, NULL,
! 1845: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1846: CTLTYPE_INT, "lowportmin",
! 1847: SYSCTL_DESCR("Lowest privileged ephemeral port number "
! 1848: "to assign"),
! 1849: sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
! 1850: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1851: IPV6CTL_LOWPORTMIN, CTL_EOL);
! 1852: sysctl_createv(clog, 0, NULL, NULL,
! 1853: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1854: CTLTYPE_INT, "lowportmax",
! 1855: SYSCTL_DESCR("Highest privileged ephemeral port number "
! 1856: "to assign"),
! 1857: sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
! 1858: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1859: IPV6CTL_LOWPORTMAX, CTL_EOL);
! 1860: #endif /* IPNOPRIVPORTS */
! 1861: sysctl_createv(clog, 0, NULL, NULL,
! 1862: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1863: CTLTYPE_INT, "use_tempaddr",
! 1864: SYSCTL_DESCR("Use temporary address"),
! 1865: NULL, 0, &ip6_use_tempaddr, 0,
! 1866: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1867: CTL_CREATE, CTL_EOL);
! 1868: sysctl_createv(clog, 0, NULL, NULL,
! 1869: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1870: CTLTYPE_INT, "temppltime",
! 1871: SYSCTL_DESCR("preferred lifetime of a temporary address"),
! 1872: NULL, 0, &ip6_temp_preferred_lifetime, 0,
! 1873: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1874: CTL_CREATE, CTL_EOL);
! 1875: sysctl_createv(clog, 0, NULL, NULL,
! 1876: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1877: CTLTYPE_INT, "tempvltime",
! 1878: SYSCTL_DESCR("valid lifetime of a temporary address"),
! 1879: NULL, 0, &ip6_temp_valid_lifetime, 0,
! 1880: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1881: CTL_CREATE, CTL_EOL);
! 1882: sysctl_createv(clog, 0, NULL, NULL,
! 1883: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1884: CTLTYPE_INT, "maxfrags",
! 1885: SYSCTL_DESCR("Maximum fragments in reassembly queue"),
! 1886: NULL, 0, &ip6_maxfrags, 0,
! 1887: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1888: IPV6CTL_MAXFRAGS, CTL_EOL);
! 1889: sysctl_createv(clog, 0, NULL, NULL,
! 1890: CTLFLAG_PERMANENT,
! 1891: CTLTYPE_STRUCT, "stats",
! 1892: SYSCTL_DESCR("IPv6 statistics"),
! 1893: NULL, 0, &ip6stat, sizeof(ip6stat),
! 1894: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1895: IPV6CTL_STATS, CTL_EOL);
! 1896: sysctl_createv(clog, 0, NULL, NULL,
! 1897: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1898: CTLTYPE_INT, "use_defaultzone",
! 1899: SYSCTL_DESCR("Whether to use the default scope zones"),
! 1900: NULL, 0, &ip6_use_defzone, 0,
! 1901: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1902: IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
! 1903: sysctl_createv(clog, 0, NULL, NULL,
! 1904: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1905: CTLTYPE_INT, "mcast_pmtu",
! 1906: SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
! 1907: NULL, 0, &ip6_mcast_pmtu, 0,
! 1908: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1909: CTL_CREATE, CTL_EOL);
! 1910: #ifdef GATEWAY
! 1911: sysctl_createv(clog, 0, NULL, NULL,
! 1912: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1913: CTLTYPE_INT, "maxflows",
! 1914: SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
! 1915: sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0,
! 1916: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1917: CTL_CREATE, CTL_EOL);
! 1918: sysctl_createv(clog, 0, NULL, NULL,
! 1919: CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
! 1920: CTLTYPE_INT, "hashsize",
! 1921: SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
! 1922: sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
! 1923: CTL_NET, PF_INET6, IPPROTO_IPV6,
! 1924: CTL_CREATE, CTL_EOL);
! 1925: #endif
! 1926: }
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