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Annotation of src/sys/netinet6/ip6_input.c, Revision 1.99

1.99    ! liamjfoy    1: /*     $NetBSD: ip6_input.c,v 1.98 2007/03/07 22:20:04 liamjfoy Exp $  */
1.40      itojun      2: /*     $KAME: ip6_input.c,v 1.188 2001/03/29 05:34:31 itojun Exp $     */
1.3       thorpej     3:
1.2       itojun      4: /*
                      5:  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
                      6:  * All rights reserved.
1.21      itojun      7:  *
1.2       itojun      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.
1.21      itojun     19:  *
1.2       itojun     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.
1.65      agc        45:  * 3. Neither the name of the University nor the names of its contributors
1.2       itojun     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:  */
1.48      lukem      63:
                     64: #include <sys/cdefs.h>
1.99    ! liamjfoy   65: __KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.98 2007/03/07 22:20:04 liamjfoy Exp $");
1.2       itojun     66:
                     67: #include "opt_inet.h"
1.85      rpaulo     68: #include "opt_inet6.h"
1.4       thorpej    69: #include "opt_ipsec.h"
1.15      darrenr    70: #include "opt_pfil_hooks.h"
1.2       itojun     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>
1.46      simonb     85: #include <sys/sysctl.h>
1.2       itojun     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>
1.15      darrenr    92: #ifdef PFIL_HOOKS
                     93: #include <net/pfil.h>
                     94: #endif
1.2       itojun     95:
                     96: #include <netinet/in.h>
1.9       itojun     97: #include <netinet/in_systm.h>
                     98: #ifdef INET
                     99: #include <netinet/ip.h>
                    100: #include <netinet/ip_icmp.h>
1.45      itojun    101: #endif /* INET */
1.14      itojun    102: #include <netinet/ip6.h>
1.2       itojun    103: #include <netinet6/in6_var.h>
1.11      itojun    104: #include <netinet6/ip6_var.h>
1.2       itojun    105: #include <netinet6/in6_pcb.h>
1.14      itojun    106: #include <netinet/icmp6.h>
1.81      rpaulo    107: #include <netinet6/scope6_var.h>
1.2       itojun    108: #include <netinet6/in6_ifattach.h>
                    109: #include <netinet6/nd6.h>
                    110:
1.37      itojun    111: #ifdef IPSEC
                    112: #include <netinet6/ipsec.h>
                    113: #endif
                    114:
1.94      degroote  115: #ifdef FAST_IPSEC
                    116: #include <netipsec/ipsec.h>
                    117: #include <netipsec/ipsec6.h>
                    118: #include <netipsec/key.h>
                    119: #endif /* FAST_IPSEC */
                    120:
1.2       itojun    121: #include <netinet6/ip6protosw.h>
                    122:
                    123: #include "faith.h"
                    124: #include "gif.h"
1.50      itojun    125:
                    126: #if NGIF > 0
                    127: #include <netinet6/in6_gif.h>
                    128: #endif
1.2       itojun    129:
1.9       itojun    130: #include <net/net_osdep.h>
                    131:
1.2       itojun    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:
1.83      rpaulo    139: extern struct callout in6_tmpaddrtimer_ch;
                    140:
1.2       itojun    141: int ip6_forward_srcrt;                 /* XXX */
                    142: int ip6_sourcecheck;                   /* XXX */
                    143: int ip6_sourcecheck_interval;          /* XXX */
1.9       itojun    144:
1.29      thorpej   145: #ifdef PFIL_HOOKS
                    146: struct pfil_head inet6_pfil_hook;
                    147: #endif
                    148:
1.2       itojun    149: struct ip6stat ip6stat;
                    150:
                    151: static void ip6_init2 __P((void *));
1.81      rpaulo    152: static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *));
1.2       itojun    153:
1.5       itojun    154: static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *));
1.62      itojun    155: static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int));
1.2       itojun    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: {
1.78      christos  164:        const struct ip6protosw *pr;
1.35      itojun    165:        int i;
1.2       itojun    166:
1.78      christos  167:        pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW);
1.2       itojun    168:        if (pr == 0)
                    169:                panic("ip6_init");
                    170:        for (i = 0; i < IPPROTO_MAX; i++)
                    171:                ip6_protox[i] = pr - inet6sw;
1.78      christos  172:        for (pr = (const struct ip6protosw *)inet6domain.dom_protosw;
                    173:            pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++)
1.2       itojun    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;
1.81      rpaulo    178:        scope6_init();
                    179:        addrsel_policy_init();
1.2       itojun    180:        nd6_init();
                    181:        frag6_init();
1.83      rpaulo    182:        ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR;
1.2       itojun    183:
                    184:        ip6_init2((void *)0);
1.98      liamjfoy  185: #ifdef GATEWAY
1.99    ! liamjfoy  186:        ip6flow_init(ip6_hashsize);
1.98      liamjfoy  187: #endif
1.29      thorpej   188:
                    189: #ifdef PFIL_HOOKS
                    190:        /* Register our Packet Filter hook. */
1.33      thorpej   191:        inet6_pfil_hook.ph_type = PFIL_TYPE_AF;
                    192:        inet6_pfil_hook.ph_af   = AF_INET6;
1.29      thorpej   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 */
1.2       itojun    198: }
                    199:
                    200: static void
1.90      christos  201: ip6_init2(void *dummy)
1.2       itojun    202: {
                    203:
                    204:        /* nd6_timer_init */
1.19      thorpej   205:        callout_init(&nd6_timer_ch);
                    206:        callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL);
1.83      rpaulo    207:
                    208:        /* timer for regeneranation of temporary addresses randomize ID */
                    209:        callout_init(&in6_tmpaddrtimer_ch);
                    210:        callout_reset(&in6_tmpaddrtimer_ch,
                    211:                      (ip6_temp_preferred_lifetime - ip6_desync_factor -
                    212:                       ip6_temp_regen_advance) * hz,
                    213:                      in6_tmpaddrtimer, NULL);
1.2       itojun    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 (;;) {
1.41      thorpej   226:                s = splnet();
1.2       itojun    227:                IF_DEQUEUE(&ip6intrq, m);
                    228:                splx(s);
                    229:                if (m == 0)
                    230:                        return;
1.83      rpaulo    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:                }
1.2       itojun    236:                ip6_input(m);
                    237:        }
                    238: }
                    239:
                    240: extern struct  route_in6 ip6_forward_rt;
                    241:
                    242: void
1.96      dyoung    243: ip6_input(struct mbuf *m)
1.2       itojun    244: {
1.9       itojun    245:        struct ip6_hdr *ip6;
1.2       itojun    246:        int off = sizeof(struct ip6_hdr), nest;
                    247:        u_int32_t plen;
1.5       itojun    248:        u_int32_t rtalert = ~0;
1.2       itojun    249:        int nxt, ours = 0;
1.9       itojun    250:        struct ifnet *deliverifp = NULL;
1.64      itojun    251:        int srcrt = 0;
1.94      degroote  252: #ifdef FAST_IPSEC
                    253:        struct m_tag *mtag;
                    254:        struct tdb_ident *tdbi;
                    255:        struct secpolicy *sp;
                    256:        int s, error;
                    257: #endif
1.2       itojun    258:
                    259: #ifdef IPSEC
                    260:        /*
                    261:         * should the inner packet be considered authentic?
                    262:         * see comment in ah4_input().
                    263:         */
1.49      itojun    264:        m->m_flags &= ~M_AUTHIPHDR;
                    265:        m->m_flags &= ~M_AUTHIPDGM;
1.2       itojun    266: #endif
1.9       itojun    267:
1.2       itojun    268:        /*
1.81      rpaulo    269:         * make sure we don't have onion peering information into m_tag.
                    270:         */
                    271:        ip6_delaux(m);
                    272:
                    273:        /*
1.44      itojun    274:         * mbuf statistics
1.2       itojun    275:         */
                    276:        if (m->m_flags & M_EXT) {
                    277:                if (m->m_next)
                    278:                        ip6stat.ip6s_mext2m++;
                    279:                else
                    280:                        ip6stat.ip6s_mext1++;
                    281:        } else {
1.96      dyoung    282: #define M2MMAX __arraycount(ip6stat.ip6s_m2m)
1.2       itojun    283:                if (m->m_next) {
1.9       itojun    284:                        if (m->m_flags & M_LOOP) {
1.77      peter     285:                                ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */
1.40      itojun    286:                        } else if (m->m_pkthdr.rcvif->if_index < M2MMAX)
1.2       itojun    287:                                ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++;
                    288:                        else
                    289:                                ip6stat.ip6s_m2m[0]++;
                    290:                } else
                    291:                        ip6stat.ip6s_m1++;
1.40      itojun    292: #undef M2MMAX
1.2       itojun    293:        }
                    294:
1.9       itojun    295:        in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive);
                    296:        ip6stat.ip6s_total++;
                    297:
1.57      thorpej   298:        /*
                    299:         * If the IPv6 header is not aligned, slurp it up into a new
                    300:         * mbuf with space for link headers, in the event we forward
1.81      rpaulo    301:         * it.  Otherwise, if it is aligned, make sure the entire base
1.57      thorpej   302:         * IPv6 header is in the first mbuf of the chain.
                    303:         */
1.97      christos  304:        if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) {
1.57      thorpej   305:                struct ifnet *inifp = m->m_pkthdr.rcvif;
                    306:                if ((m = m_copyup(m, sizeof(struct ip6_hdr),
                    307:                                  (max_linkhdr + 3) & ~3)) == NULL) {
                    308:                        /* XXXJRT new stat, please */
                    309:                        ip6stat.ip6s_toosmall++;
                    310:                        in6_ifstat_inc(inifp, ifs6_in_hdrerr);
                    311:                        return;
                    312:                }
                    313:        } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
                    314:                struct ifnet *inifp = m->m_pkthdr.rcvif;
1.55      itojun    315:                if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
1.9       itojun    316:                        ip6stat.ip6s_toosmall++;
                    317:                        in6_ifstat_inc(inifp, ifs6_in_hdrerr);
                    318:                        return;
                    319:                }
1.2       itojun    320:        }
                    321:
                    322:        ip6 = mtod(m, struct ip6_hdr *);
                    323:
                    324:        if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
                    325:                ip6stat.ip6s_badvers++;
1.9       itojun    326:                in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
1.2       itojun    327:                goto bad;
                    328:        }
1.15      darrenr   329:
1.98      liamjfoy  330: #if defined(IPSEC)
                    331:        /* IPv6 fast forwarding is not compatible with IPsec. */
                    332:        m->m_flags &= ~M_CANFASTFWD;
                    333: #else
                    334:        /*
                    335:         * Assume that we can create a fast-forward IP flow entry
                    336:         * based on this packet.
                    337:         */
                    338:        m->m_flags |= M_CANFASTFWD;
                    339: #endif
                    340:
1.15      darrenr   341: #ifdef PFIL_HOOKS
                    342:        /*
                    343:         * Run through list of hooks for input packets.  If there are any
                    344:         * filters which require that additional packets in the flow are
                    345:         * not fast-forwarded, they must clear the M_CANFASTFWD flag.
                    346:         * Note that filters must _never_ set this flag, as another filter
                    347:         * in the list may have previously cleared it.
                    348:         */
1.39      itojun    349:        /*
                    350:         * let ipfilter look at packet on the wire,
                    351:         * not the decapsulated packet.
                    352:         */
                    353: #ifdef IPSEC
1.42      itojun    354:        if (!ipsec_getnhist(m))
1.94      degroote  355: #elif defined(FAST_IPSEC)
                    356:        if (!ipsec_indone(m))
1.39      itojun    357: #else
                    358:        if (1)
                    359: #endif
                    360:        {
1.64      itojun    361:                struct in6_addr odst;
                    362:
                    363:                odst = ip6->ip6_dst;
1.39      itojun    364:                if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif,
                    365:                                   PFIL_IN) != 0)
                    366:                        return;
                    367:                if (m == NULL)
                    368:                        return;
                    369:                ip6 = mtod(m, struct ip6_hdr *);
1.64      itojun    370:                srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
1.39      itojun    371:        }
1.15      darrenr   372: #endif /* PFIL_HOOKS */
                    373:
1.2       itojun    374:        ip6stat.ip6s_nxthist[ip6->ip6_nxt]++;
                    375:
1.30      thorpej   376: #ifdef ALTQ
                    377:        if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) {
                    378:                /* packet is dropped by traffic conditioner */
                    379:                return;
1.9       itojun    380:        }
                    381: #endif
                    382:
1.2       itojun    383:        /*
1.44      itojun    384:         * Check against address spoofing/corruption.
1.2       itojun    385:         */
                    386:        if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) ||
                    387:            IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) {
1.55      itojun    388:                /*
                    389:                 * XXX: "badscope" is not very suitable for a multicast source.
                    390:                 */
1.2       itojun    391:                ip6stat.ip6s_badscope++;
1.9       itojun    392:                in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
1.2       itojun    393:                goto bad;
                    394:        }
1.13      itojun    395:        /*
1.44      itojun    396:         * The following check is not documented in specs.  A malicious
                    397:         * party may be able to use IPv4 mapped addr to confuse tcp/udp stack
                    398:         * and bypass security checks (act as if it was from 127.0.0.1 by using
                    399:         * IPv6 src ::ffff:127.0.0.1).  Be cautious.
1.35      itojun    400:         *
1.44      itojun    401:         * This check chokes if we are in an SIIT cloud.  As none of BSDs
                    402:         * support IPv4-less kernel compilation, we cannot support SIIT
                    403:         * environment at all.  So, it makes more sense for us to reject any
                    404:         * malicious packets for non-SIIT environment, than try to do a
1.52      wiz       405:         * partial support for SIIT environment.
1.13      itojun    406:         */
                    407:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    408:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    409:                ip6stat.ip6s_badscope++;
                    410:                in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
                    411:                goto bad;
                    412:        }
1.17      itojun    413: #if 0
1.13      itojun    414:        /*
1.17      itojun    415:         * Reject packets with IPv4 compatible addresses (auto tunnel).
                    416:         *
                    417:         * The code forbids auto tunnel relay case in RFC1933 (the check is
                    418:         * stronger than RFC1933).  We may want to re-enable it if mech-xx
                    419:         * is revised to forbid relaying case.
1.13      itojun    420:         */
                    421:        if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) ||
                    422:            IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) {
                    423:                ip6stat.ip6s_badscope++;
                    424:                in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
                    425:                goto bad;
                    426:        }
                    427: #endif
1.35      itojun    428:
1.2       itojun    429:        /*
1.82      yamt      430:         * Disambiguate address scope zones (if there is ambiguity).
                    431:         * We first make sure that the original source or destination address
                    432:         * is not in our internal form for scoped addresses.  Such addresses
                    433:         * are not necessarily invalid spec-wise, but we cannot accept them due
                    434:         * to the usage conflict.
                    435:         * in6_setscope() then also checks and rejects the cases where src or
                    436:         * dst are the loopback address and the receiving interface
                    437:         * is not loopback.
                    438:         */
1.88      bouyer    439:        if (__predict_false(
                    440:            m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT)))
                    441:                goto bad;
                    442:        ip6 = mtod(m, struct ip6_hdr *);
1.82      yamt      443:        if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) {
                    444:                ip6stat.ip6s_badscope++; /* XXX */
                    445:                goto bad;
                    446:        }
                    447:        if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) ||
                    448:            in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) {
                    449:                ip6stat.ip6s_badscope++;
                    450:                goto bad;
                    451:        }
                    452:
                    453:        /*
1.2       itojun    454:         * Multicast check
                    455:         */
                    456:        if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
                    457:                struct  in6_multi *in6m = 0;
1.9       itojun    458:
                    459:                in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast);
1.2       itojun    460:                /*
                    461:                 * See if we belong to the destination multicast group on the
                    462:                 * arrival interface.
                    463:                 */
                    464:                IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m);
                    465:                if (in6m)
                    466:                        ours = 1;
                    467:                else if (!ip6_mrouter) {
                    468:                        ip6stat.ip6s_notmember++;
                    469:                        ip6stat.ip6s_cantforward++;
1.9       itojun    470:                        in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2       itojun    471:                        goto bad;
                    472:                }
1.9       itojun    473:                deliverifp = m->m_pkthdr.rcvif;
1.2       itojun    474:                goto hbhcheck;
                    475:        }
                    476:
                    477:        /*
                    478:         *  Unicast check
                    479:         */
1.93      joerg     480:        if (!IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.95      dyoung    481:            &((const struct sockaddr_in6 *)rtcache_getdst((const struct route *)&ip6_forward_rt))->sin6_addr))
1.93      joerg     482:                rtcache_free((struct route *)&ip6_forward_rt);
                    483:        else
                    484:                rtcache_check((struct route *)&ip6_forward_rt);
                    485:        if (ip6_forward_rt.ro_rt != NULL) {
                    486:                /* XXX Revalidated route is accounted wrongly. */
1.25      itojun    487:                ip6stat.ip6s_forward_cachehit++;
1.93      joerg     488:        } else {
1.35      itojun    489:                struct sockaddr_in6 *dst6;
                    490:
1.93      joerg     491:                ip6stat.ip6s_forward_cachemiss++;
1.22      itojun    492:
1.95      dyoung    493:                dst6 = &ip6_forward_rt.ro_dst;
                    494:                memset(dst6, 0, sizeof(*dst6));
1.35      itojun    495:                dst6->sin6_len = sizeof(struct sockaddr_in6);
                    496:                dst6->sin6_family = AF_INET6;
                    497:                dst6->sin6_addr = ip6->ip6_dst;
1.2       itojun    498:
1.93      joerg     499:                rtcache_init((struct route *)&ip6_forward_rt);
1.2       itojun    500:        }
                    501:
                    502: #define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key))
                    503:
                    504:        /*
                    505:         * Accept the packet if the forwarding interface to the destination
                    506:         * according to the routing table is the loopback interface,
                    507:         * unless the associated route has a gateway.
                    508:         * Note that this approach causes to accept a packet if there is a
                    509:         * route to the loopback interface for the destination of the packet.
                    510:         * But we think it's even useful in some situations, e.g. when using
                    511:         * a special daemon which wants to intercept the packet.
                    512:         */
1.91      dyoung    513:        if (ip6_forward_rt.ro_rt != NULL &&
1.2       itojun    514:            (ip6_forward_rt.ro_rt->rt_flags &
                    515:             (RTF_HOST|RTF_GATEWAY)) == RTF_HOST &&
1.55      itojun    516:            !(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) &&
1.2       itojun    517: #if 0
                    518:            /*
                    519:             * The check below is redundant since the comparison of
                    520:             * the destination and the key of the rtentry has
                    521:             * already done through looking up the routing table.
                    522:             */
                    523:            IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1.55      itojun    524:            &rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) &&
1.2       itojun    525: #endif
1.9       itojun    526:            ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
1.2       itojun    527:                struct in6_ifaddr *ia6 =
                    528:                        (struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
                    529:                if (ia6->ia6_flags & IN6_IFF_ANYCAST)
                    530:                        m->m_flags |= M_ANYCAST6;
1.24      itojun    531:                /*
                    532:                 * packets to a tentative, duplicated, or somehow invalid
                    533:                 * address must not be accepted.
                    534:                 */
1.2       itojun    535:                if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
1.24      itojun    536:                        /* this address is ready */
1.2       itojun    537:                        ours = 1;
1.9       itojun    538:                        deliverifp = ia6->ia_ifp;       /* correct? */
1.2       itojun    539:                        goto hbhcheck;
                    540:                } else {
1.24      itojun    541:                        /* address is not ready, so discard the packet. */
1.34      itojun    542:                        nd6log((LOG_INFO,
1.27      itojun    543:                            "ip6_input: packet to an unready address %s->%s\n",
1.24      itojun    544:                            ip6_sprintf(&ip6->ip6_src),
1.34      itojun    545:                            ip6_sprintf(&ip6->ip6_dst)));
1.24      itojun    546:
                    547:                        goto bad;
1.2       itojun    548:                }
                    549:        }
                    550:
                    551:        /*
1.55      itojun    552:         * FAITH (Firewall Aided Internet Translator)
1.2       itojun    553:         */
                    554: #if defined(NFAITH) && 0 < NFAITH
                    555:        if (ip6_keepfaith) {
1.91      dyoung    556:                if (ip6_forward_rt.ro_rt != NULL &&
                    557:                    ip6_forward_rt.ro_rt->rt_ifp != NULL &&
1.71      itojun    558:                    ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) {
1.2       itojun    559:                        /* XXX do we need more sanity checks? */
                    560:                        ours = 1;
1.45      itojun    561:                        deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */
1.9       itojun    562:                        goto hbhcheck;
                    563:                }
                    564:        }
                    565: #endif
                    566:
                    567: #if 0
                    568:     {
                    569:        /*
                    570:         * Last resort: check in6_ifaddr for incoming interface.
                    571:         * The code is here until I update the "goto ours hack" code above
                    572:         * working right.
                    573:         */
                    574:        struct ifaddr *ifa;
1.91      dyoung    575:        TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) {
1.9       itojun    576:                if (ifa->ifa_addr == NULL)
                    577:                        continue;       /* just for safety */
                    578:                if (ifa->ifa_addr->sa_family != AF_INET6)
                    579:                        continue;
                    580:                if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) {
                    581:                        ours = 1;
                    582:                        deliverifp = ifa->ifa_ifp;
1.2       itojun    583:                        goto hbhcheck;
                    584:                }
                    585:        }
1.9       itojun    586:     }
1.2       itojun    587: #endif
                    588:
                    589:        /*
                    590:         * Now there is no reason to process the packet if it's not our own
                    591:         * and we're not a router.
                    592:         */
                    593:        if (!ip6_forwarding) {
                    594:                ip6stat.ip6s_cantforward++;
1.9       itojun    595:                in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
1.2       itojun    596:                goto bad;
                    597:        }
                    598:
                    599:   hbhcheck:
                    600:        /*
1.81      rpaulo    601:         * record address information into m_tag, if we don't have one yet.
                    602:         * note that we are unable to record it, if the address is not listed
                    603:         * as our interface address (e.g. multicast addresses, addresses
                    604:         * within FAITH prefixes and such).
                    605:         */
                    606:        if (deliverifp && !ip6_getdstifaddr(m)) {
                    607:                struct in6_ifaddr *ia6;
                    608:
                    609:                ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
                    610:                if (ia6) {
                    611:                        if (!ip6_setdstifaddr(m, ia6)) {
                    612:                                /*
                    613:                                 * XXX maybe we should drop the packet here,
                    614:                                 * as we could not provide enough information
                    615:                                 * to the upper layers.
                    616:                                 */
                    617:                        }
                    618:                }
                    619:        }
                    620:
                    621:        /*
1.2       itojun    622:         * Process Hop-by-Hop options header if it's contained.
                    623:         * m may be modified in ip6_hopopts_input().
                    624:         * If a JumboPayload option is included, plen will also be modified.
                    625:         */
                    626:        plen = (u_int32_t)ntohs(ip6->ip6_plen);
                    627:        if (ip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9       itojun    628:                struct ip6_hbh *hbh;
                    629:
                    630:                if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) {
                    631: #if 0  /*touches NULL pointer*/
                    632:                        in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
                    633: #endif
1.2       itojun    634:                        return; /* m have already been freed */
1.9       itojun    635:                }
1.22      itojun    636:
1.2       itojun    637:                /* adjust pointer */
                    638:                ip6 = mtod(m, struct ip6_hdr *);
1.22      itojun    639:
                    640:                /*
1.49      itojun    641:                 * if the payload length field is 0 and the next header field
1.22      itojun    642:                 * indicates Hop-by-Hop Options header, then a Jumbo Payload
                    643:                 * option MUST be included.
                    644:                 */
                    645:                if (ip6->ip6_plen == 0 && plen == 0) {
                    646:                        /*
                    647:                         * Note that if a valid jumbo payload option is
1.83      rpaulo    648:                         * contained, ip6_hopopts_input() must set a valid
1.55      itojun    649:                         * (non-zero) payload length to the variable plen.
1.22      itojun    650:                         */
                    651:                        ip6stat.ip6s_badoptions++;
                    652:                        in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard);
                    653:                        in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
                    654:                        icmp6_error(m, ICMP6_PARAM_PROB,
                    655:                                    ICMP6_PARAMPROB_HEADER,
1.97      christos  656:                                    (char *)&ip6->ip6_plen - (char *)ip6);
1.22      itojun    657:                        return;
                    658:                }
1.9       itojun    659:                IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
                    660:                        sizeof(struct ip6_hbh));
                    661:                if (hbh == NULL) {
                    662:                        ip6stat.ip6s_tooshort++;
                    663:                        return;
                    664:                }
1.57      thorpej   665:                KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.9       itojun    666:                nxt = hbh->ip6h_nxt;
1.2       itojun    667:
                    668:                /*
                    669:                 * accept the packet if a router alert option is included
                    670:                 * and we act as an IPv6 router.
                    671:                 */
1.5       itojun    672:                if (rtalert != ~0 && ip6_forwarding)
1.2       itojun    673:                        ours = 1;
                    674:        } else
                    675:                nxt = ip6->ip6_nxt;
                    676:
                    677:        /*
                    678:         * Check that the amount of data in the buffers
                    679:         * is as at least much as the IPv6 header would have us expect.
                    680:         * Trim mbufs if longer than we expect.
                    681:         * Drop packet if shorter than we expect.
                    682:         */
                    683:        if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) {
                    684:                ip6stat.ip6s_tooshort++;
1.9       itojun    685:                in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.2       itojun    686:                goto bad;
                    687:        }
                    688:        if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) {
                    689:                if (m->m_len == m->m_pkthdr.len) {
                    690:                        m->m_len = sizeof(struct ip6_hdr) + plen;
                    691:                        m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen;
                    692:                } else
                    693:                        m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len);
                    694:        }
                    695:
                    696:        /*
                    697:         * Forward if desirable.
                    698:         */
                    699:        if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
                    700:                /*
                    701:                 * If we are acting as a multicast router, all
                    702:                 * incoming multicast packets are passed to the
                    703:                 * kernel-level multicast forwarding function.
                    704:                 * The packet is returned (relatively) intact; if
                    705:                 * ip6_mforward() returns a non-zero value, the packet
                    706:                 * must be discarded, else it may be accepted below.
                    707:                 */
                    708:                if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) {
                    709:                        ip6stat.ip6s_cantforward++;
                    710:                        m_freem(m);
                    711:                        return;
                    712:                }
                    713:                if (!ours) {
                    714:                        m_freem(m);
                    715:                        return;
                    716:                }
1.22      itojun    717:        } else if (!ours) {
1.64      itojun    718:                ip6_forward(m, srcrt);
1.2       itojun    719:                return;
1.56      itojun    720:        }
1.25      itojun    721:
                    722:        ip6 = mtod(m, struct ip6_hdr *);
                    723:
                    724:        /*
                    725:         * Malicious party may be able to use IPv4 mapped addr to confuse
                    726:         * tcp/udp stack and bypass security checks (act as if it was from
                    727:         * 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1).  Be cautious.
                    728:         *
                    729:         * For SIIT end node behavior, you may want to disable the check.
                    730:         * However, you will  become vulnerable to attacks using IPv4 mapped
                    731:         * source.
                    732:         */
                    733:        if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) ||
                    734:            IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) {
                    735:                ip6stat.ip6s_badscope++;
                    736:                in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr);
                    737:                goto bad;
                    738:        }
1.2       itojun    739:
                    740:        /*
                    741:         * Tell launch routine the next header
                    742:         */
1.12      itojun    743: #ifdef IFA_STATS
1.28      itojun    744:        if (deliverifp != NULL) {
1.9       itojun    745:                struct in6_ifaddr *ia6;
                    746:                ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
                    747:                if (ia6)
                    748:                        ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len;
                    749:        }
                    750: #endif
1.2       itojun    751:        ip6stat.ip6s_delivered++;
1.9       itojun    752:        in6_ifstat_inc(deliverifp, ifs6_in_deliver);
1.2       itojun    753:        nest = 0;
1.40      itojun    754:
1.2       itojun    755:        while (nxt != IPPROTO_DONE) {
                    756:                if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) {
                    757:                        ip6stat.ip6s_toomanyhdr++;
                    758:                        goto bad;
                    759:                }
1.8       itojun    760:
                    761:                /*
                    762:                 * protection against faulty packet - there should be
                    763:                 * more sanity checks in header chain processing.
                    764:                 */
                    765:                if (m->m_pkthdr.len < off) {
                    766:                        ip6stat.ip6s_tooshort++;
1.9       itojun    767:                        in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated);
1.8       itojun    768:                        goto bad;
                    769:                }
                    770:
1.37      itojun    771: #ifdef IPSEC
                    772:                /*
                    773:                 * enforce IPsec policy checking if we are seeing last header.
                    774:                 * note that we do not visit this with protocols with pcb layer
                    775:                 * code - like udp/tcp/raw ip.
                    776:                 */
                    777:                if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 &&
                    778:                    ipsec6_in_reject(m, NULL)) {
                    779:                        ipsec6stat.in_polvio++;
                    780:                        goto bad;
                    781:                }
                    782: #endif
1.94      degroote  783: #ifdef FAST_IPSEC
                    784:        /*
                    785:         * enforce IPsec policy checking if we are seeing last header.
                    786:         * note that we do not visit this with protocols with pcb layer
                    787:         * code - like udp/tcp/raw ip.
                    788:         */
                    789:        if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) {
                    790:                /*
                    791:                 * Check if the packet has already had IPsec processing
                    792:                 * done.  If so, then just pass it along.  This tag gets
                    793:                 * set during AH, ESP, etc. input handling, before the
                    794:                 * packet is returned to the ip input queue for delivery.
                    795:                 */
                    796:                mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
                    797:                s = splsoftnet();
                    798:                if (mtag != NULL) {
                    799:                        tdbi = (struct tdb_ident *)(mtag + 1);
                    800:                        sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND);
                    801:                } else {
                    802:                        sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND,
                    803:                                                                        IP_FORWARDING, &error);
                    804:                }
                    805:                if (sp != NULL) {
                    806:                        /*
                    807:                         * Check security policy against packet attributes.
                    808:                         */
                    809:                        error = ipsec_in_reject(sp, m);
                    810:                        KEY_FREESP(&sp);
                    811:                } else {
                    812:                        /* XXX error stat??? */
                    813:                        error = EINVAL;
                    814:                        DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/
                    815:                        goto bad;
                    816:                }
                    817:                splx(s);
                    818:                if (error)
                    819:                        goto bad;
                    820:        }
                    821: #endif /* FAST_IPSEC */
                    822:
1.56      itojun    823:
1.2       itojun    824:                nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt);
                    825:        }
                    826:        return;
                    827:  bad:
                    828:        m_freem(m);
                    829: }
                    830:
                    831: /*
1.81      rpaulo    832:  * set/grab in6_ifaddr correspond to IPv6 destination address.
                    833:  */
                    834: static struct m_tag *
                    835: ip6_setdstifaddr(m, ia6)
                    836:        struct mbuf *m;
                    837:        struct in6_ifaddr *ia6;
                    838: {
                    839:        struct m_tag *mtag;
                    840:
                    841:        mtag = ip6_addaux(m);
                    842:        if (mtag)
                    843:                ((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6;
                    844:        return mtag;    /* NULL if failed to set */
                    845: }
                    846:
                    847: struct in6_ifaddr *
                    848: ip6_getdstifaddr(m)
                    849:        struct mbuf *m;
                    850: {
                    851:        struct m_tag *mtag;
                    852:
                    853:        mtag = ip6_findaux(m);
                    854:        if (mtag)
                    855:                return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6;
                    856:        else
                    857:                return NULL;
                    858: }
                    859:
                    860: /*
1.2       itojun    861:  * Hop-by-Hop options header processing. If a valid jumbo payload option is
                    862:  * included, the real payload length will be stored in plenp.
                    863:  */
                    864: static int
                    865: ip6_hopopts_input(plenp, rtalertp, mp, offp)
                    866:        u_int32_t *plenp;
1.5       itojun    867:        u_int32_t *rtalertp;    /* XXX: should be stored more smart way */
1.2       itojun    868:        struct mbuf **mp;
                    869:        int *offp;
                    870: {
1.35      itojun    871:        struct mbuf *m = *mp;
1.2       itojun    872:        int off = *offp, hbhlen;
                    873:        struct ip6_hbh *hbh;
                    874:
                    875:        /* validation of the length of the header */
1.9       itojun    876:        IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m,
                    877:                sizeof(struct ip6_hdr), sizeof(struct ip6_hbh));
                    878:        if (hbh == NULL) {
                    879:                ip6stat.ip6s_tooshort++;
                    880:                return -1;
                    881:        }
                    882:        hbhlen = (hbh->ip6h_len + 1) << 3;
                    883:        IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr),
                    884:                hbhlen);
                    885:        if (hbh == NULL) {
                    886:                ip6stat.ip6s_tooshort++;
                    887:                return -1;
                    888:        }
1.57      thorpej   889:        KASSERT(IP6_HDR_ALIGNED_P(hbh));
1.2       itojun    890:        off += hbhlen;
                    891:        hbhlen -= sizeof(struct ip6_hbh);
                    892:
                    893:        if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh),
                    894:                                hbhlen, rtalertp, plenp) < 0)
1.58      itojun    895:                return (-1);
1.2       itojun    896:
                    897:        *offp = off;
                    898:        *mp = m;
1.58      itojun    899:        return (0);
1.2       itojun    900: }
                    901:
                    902: /*
                    903:  * Search header for all Hop-by-hop options and process each option.
                    904:  * This function is separate from ip6_hopopts_input() in order to
                    905:  * handle a case where the sending node itself process its hop-by-hop
                    906:  * options header. In such a case, the function is called from ip6_output().
1.55      itojun    907:  *
                    908:  * The function assumes that hbh header is located right after the IPv6 header
                    909:  * (RFC2460 p7), opthead is pointer into data content in m, and opthead to
                    910:  * opthead + hbhlen is located in continuous memory region.
1.2       itojun    911:  */
                    912: int
                    913: ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp)
                    914:        struct mbuf *m;
                    915:        u_int8_t *opthead;
                    916:        int hbhlen;
1.5       itojun    917:        u_int32_t *rtalertp;
1.2       itojun    918:        u_int32_t *plenp;
                    919: {
                    920:        struct ip6_hdr *ip6;
                    921:        int optlen = 0;
                    922:        u_int8_t *opt = opthead;
                    923:        u_int16_t rtalert_val;
1.22      itojun    924:        u_int32_t jumboplen;
1.55      itojun    925:        const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh);
1.2       itojun    926:
                    927:        for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) {
1.35      itojun    928:                switch (*opt) {
                    929:                case IP6OPT_PAD1:
                    930:                        optlen = 1;
                    931:                        break;
                    932:                case IP6OPT_PADN:
                    933:                        if (hbhlen < IP6OPT_MINLEN) {
                    934:                                ip6stat.ip6s_toosmall++;
                    935:                                goto bad;
                    936:                        }
                    937:                        optlen = *(opt + 1) + 2;
                    938:                        break;
                    939:                case IP6OPT_RTALERT:
                    940:                        /* XXX may need check for alignment */
                    941:                        if (hbhlen < IP6OPT_RTALERT_LEN) {
                    942:                                ip6stat.ip6s_toosmall++;
                    943:                                goto bad;
                    944:                        }
                    945:                        if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) {
1.55      itojun    946:                                /* XXX stat */
                    947:                                icmp6_error(m, ICMP6_PARAM_PROB,
                    948:                                    ICMP6_PARAMPROB_HEADER,
                    949:                                    erroff + opt + 1 - opthead);
                    950:                                return (-1);
1.35      itojun    951:                        }
                    952:                        optlen = IP6OPT_RTALERT_LEN;
1.97      christos  953:                        bcopy((void *)(opt + 2), (void *)&rtalert_val, 2);
1.35      itojun    954:                        *rtalertp = ntohs(rtalert_val);
                    955:                        break;
                    956:                case IP6OPT_JUMBO:
1.22      itojun    957:                        /* XXX may need check for alignment */
                    958:                        if (hbhlen < IP6OPT_JUMBO_LEN) {
                    959:                                ip6stat.ip6s_toosmall++;
                    960:                                goto bad;
                    961:                        }
1.35      itojun    962:                        if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) {
1.55      itojun    963:                                /* XXX stat */
                    964:                                icmp6_error(m, ICMP6_PARAM_PROB,
                    965:                                    ICMP6_PARAMPROB_HEADER,
                    966:                                    erroff + opt + 1 - opthead);
                    967:                                return (-1);
1.35      itojun    968:                        }
1.22      itojun    969:                        optlen = IP6OPT_JUMBO_LEN;
                    970:
                    971:                        /*
                    972:                         * IPv6 packets that have non 0 payload length
1.35      itojun    973:                         * must not contain a jumbo payload option.
1.22      itojun    974:                         */
                    975:                        ip6 = mtod(m, struct ip6_hdr *);
                    976:                        if (ip6->ip6_plen) {
                    977:                                ip6stat.ip6s_badoptions++;
                    978:                                icmp6_error(m, ICMP6_PARAM_PROB,
1.55      itojun    979:                                    ICMP6_PARAMPROB_HEADER,
                    980:                                    erroff + opt - opthead);
                    981:                                return (-1);
1.22      itojun    982:                        }
1.2       itojun    983:
1.22      itojun    984:                        /*
                    985:                         * We may see jumbolen in unaligned location, so
                    986:                         * we'd need to perform bcopy().
                    987:                         */
                    988:                        bcopy(opt + 2, &jumboplen, sizeof(jumboplen));
                    989:                        jumboplen = (u_int32_t)htonl(jumboplen);
                    990:
                    991: #if 1
                    992:                        /*
                    993:                         * if there are multiple jumbo payload options,
                    994:                         * *plenp will be non-zero and the packet will be
                    995:                         * rejected.
                    996:                         * the behavior may need some debate in ipngwg -
                    997:                         * multiple options does not make sense, however,
                    998:                         * there's no explicit mention in specification.
                    999:                         */
                   1000:                        if (*plenp != 0) {
                   1001:                                ip6stat.ip6s_badoptions++;
                   1002:                                icmp6_error(m, ICMP6_PARAM_PROB,
1.55      itojun   1003:                                    ICMP6_PARAMPROB_HEADER,
                   1004:                                    erroff + opt + 2 - opthead);
                   1005:                                return (-1);
1.22      itojun   1006:                        }
1.8       itojun   1007: #endif
1.2       itojun   1008:
1.22      itojun   1009:                        /*
                   1010:                         * jumbo payload length must be larger than 65535.
                   1011:                         */
                   1012:                        if (jumboplen <= IPV6_MAXPACKET) {
                   1013:                                ip6stat.ip6s_badoptions++;
                   1014:                                icmp6_error(m, ICMP6_PARAM_PROB,
1.55      itojun   1015:                                    ICMP6_PARAMPROB_HEADER,
                   1016:                                    erroff + opt + 2 - opthead);
                   1017:                                return (-1);
1.22      itojun   1018:                        }
                   1019:                        *plenp = jumboplen;
                   1020:
                   1021:                        break;
1.35      itojun   1022:                default:                /* unknown option */
                   1023:                        if (hbhlen < IP6OPT_MINLEN) {
                   1024:                                ip6stat.ip6s_toosmall++;
                   1025:                                goto bad;
                   1026:                        }
1.55      itojun   1027:                        optlen = ip6_unknown_opt(opt, m,
                   1028:                            erroff + opt - opthead);
                   1029:                        if (optlen == -1)
                   1030:                                return (-1);
1.35      itojun   1031:                        optlen += 2;
                   1032:                        break;
1.2       itojun   1033:                }
                   1034:        }
                   1035:
1.55      itojun   1036:        return (0);
1.2       itojun   1037:
                   1038:   bad:
                   1039:        m_freem(m);
1.55      itojun   1040:        return (-1);
1.2       itojun   1041: }
                   1042:
                   1043: /*
                   1044:  * Unknown option processing.
                   1045:  * The third argument `off' is the offset from the IPv6 header to the option,
                   1046:  * which is necessary if the IPv6 header the and option header and IPv6 header
                   1047:  * is not continuous in order to return an ICMPv6 error.
                   1048:  */
                   1049: int
                   1050: ip6_unknown_opt(optp, m, off)
                   1051:        u_int8_t *optp;
                   1052:        struct mbuf *m;
                   1053:        int off;
                   1054: {
                   1055:        struct ip6_hdr *ip6;
                   1056:
1.35      itojun   1057:        switch (IP6OPT_TYPE(*optp)) {
                   1058:        case IP6OPT_TYPE_SKIP: /* ignore the option */
1.58      itojun   1059:                return ((int)*(optp + 1));
1.35      itojun   1060:        case IP6OPT_TYPE_DISCARD:       /* silently discard */
                   1061:                m_freem(m);
1.58      itojun   1062:                return (-1);
1.35      itojun   1063:        case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */
                   1064:                ip6stat.ip6s_badoptions++;
                   1065:                icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off);
1.58      itojun   1066:                return (-1);
1.35      itojun   1067:        case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */
                   1068:                ip6stat.ip6s_badoptions++;
                   1069:                ip6 = mtod(m, struct ip6_hdr *);
                   1070:                if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
                   1071:                    (m->m_flags & (M_BCAST|M_MCAST)))
                   1072:                        m_freem(m);
                   1073:                else
                   1074:                        icmp6_error(m, ICMP6_PARAM_PROB,
                   1075:                                    ICMP6_PARAMPROB_OPTION, off);
1.58      itojun   1076:                return (-1);
1.2       itojun   1077:        }
                   1078:
                   1079:        m_freem(m);             /* XXX: NOTREACHED */
1.58      itojun   1080:        return (-1);
1.2       itojun   1081: }
                   1082:
                   1083: /*
1.9       itojun   1084:  * Create the "control" list for this pcb.
                   1085:  *
                   1086:  * The routine will be called from upper layer handlers like tcp6_input().
                   1087:  * Thus the routine assumes that the caller (tcp6_input) have already
                   1088:  * called IP6_EXTHDR_CHECK() and all the extension headers are located in the
                   1089:  * very first mbuf on the mbuf chain.
                   1090:  * We may want to add some infinite loop prevention or sanity checks for safety.
                   1091:  * (This applies only when you are using KAME mbuf chain restriction, i.e.
                   1092:  * you are using IP6_EXTHDR_CHECK() not m_pulldown())
1.2       itojun   1093:  */
                   1094: void
                   1095: ip6_savecontrol(in6p, mp, ip6, m)
1.35      itojun   1096:        struct in6pcb *in6p;
                   1097:        struct mbuf **mp;
                   1098:        struct ip6_hdr *ip6;
                   1099:        struct mbuf *m;
1.2       itojun   1100: {
1.85      rpaulo   1101: #ifdef RFC2292
                   1102: #define IS2292(x, y)   ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
                   1103: #else
                   1104: #define IS2292(x, y)   (y)
                   1105: #endif
                   1106:
1.9       itojun   1107: #ifdef SO_TIMESTAMP
1.2       itojun   1108:        if (in6p->in6p_socket->so_options & SO_TIMESTAMP) {
                   1109:                struct timeval tv;
                   1110:
                   1111:                microtime(&tv);
1.97      christos 1112:                *mp = sbcreatecontrol((void *) &tv, sizeof(tv),
1.63      itojun   1113:                    SCM_TIMESTAMP, SOL_SOCKET);
1.2       itojun   1114:                if (*mp)
                   1115:                        mp = &(*mp)->m_next;
                   1116:        }
1.9       itojun   1117: #endif
1.87      rpaulo   1118:
                   1119:        /* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */
                   1120:        if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
                   1121:                return;
                   1122:
1.2       itojun   1123:        /* RFC 2292 sec. 5 */
1.35      itojun   1124:        if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) {
1.2       itojun   1125:                struct in6_pktinfo pi6;
1.85      rpaulo   1126:
1.2       itojun   1127:                bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr));
1.81      rpaulo   1128:                in6_clearscope(&pi6.ipi6_addr); /* XXX */
1.84      christos 1129:                pi6.ipi6_ifindex = m->m_pkthdr.rcvif ?
                   1130:                    m->m_pkthdr.rcvif->if_index : 0;
1.97      christos 1131:                *mp = sbcreatecontrol((void *) &pi6,
1.85      rpaulo   1132:                    sizeof(struct in6_pktinfo),
                   1133:                    IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6);
1.2       itojun   1134:                if (*mp)
                   1135:                        mp = &(*mp)->m_next;
                   1136:        }
1.85      rpaulo   1137:
1.2       itojun   1138:        if (in6p->in6p_flags & IN6P_HOPLIMIT) {
                   1139:                int hlim = ip6->ip6_hlim & 0xff;
1.85      rpaulo   1140:
1.97      christos 1141:                *mp = sbcreatecontrol((void *) &hlim, sizeof(int),
1.85      rpaulo   1142:                    IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6);
                   1143:                if (*mp)
                   1144:                        mp = &(*mp)->m_next;
                   1145:        }
                   1146:
                   1147:        if ((in6p->in6p_flags & IN6P_TCLASS) != 0) {
                   1148:                u_int32_t flowinfo;
                   1149:                int tclass;
                   1150:
                   1151:                flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK);
                   1152:                flowinfo >>= 20;
                   1153:
                   1154:                tclass = flowinfo & 0xff;
1.97      christos 1155:                *mp = sbcreatecontrol((void *)&tclass, sizeof(tclass),
1.85      rpaulo   1156:                    IPV6_TCLASS, IPPROTO_IPV6);
                   1157:
1.2       itojun   1158:                if (*mp)
                   1159:                        mp = &(*mp)->m_next;
                   1160:        }
                   1161:
                   1162:        /*
1.75      itojun   1163:         * IPV6_HOPOPTS socket option.  Recall that we required super-user
                   1164:         * privilege for the option (see ip6_ctloutput), but it might be too
                   1165:         * strict, since there might be some hop-by-hop options which can be
                   1166:         * returned to normal user.
1.85      rpaulo   1167:         * See also RFC3542 section 8 (or RFC2292 section 6).
1.2       itojun   1168:         */
1.75      itojun   1169:        if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) {
1.2       itojun   1170:                /*
                   1171:                 * Check if a hop-by-hop options header is contatined in the
                   1172:                 * received packet, and if so, store the options as ancillary
                   1173:                 * data. Note that a hop-by-hop options header must be
                   1174:                 * just after the IPv6 header, which fact is assured through
                   1175:                 * the IPv6 input processing.
                   1176:                 */
1.78      christos 1177:                struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
                   1178:                if (xip6->ip6_nxt == IPPROTO_HOPOPTS) {
1.9       itojun   1179:                        struct ip6_hbh *hbh;
                   1180:                        int hbhlen;
1.62      itojun   1181:                        struct mbuf *ext;
1.9       itojun   1182:
1.62      itojun   1183:                        ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr),
1.78      christos 1184:                            xip6->ip6_nxt);
1.62      itojun   1185:                        if (ext == NULL) {
1.9       itojun   1186:                                ip6stat.ip6s_tooshort++;
                   1187:                                return;
                   1188:                        }
1.62      itojun   1189:                        hbh = mtod(ext, struct ip6_hbh *);
1.9       itojun   1190:                        hbhlen = (hbh->ip6h_len + 1) << 3;
1.62      itojun   1191:                        if (hbhlen != ext->m_len) {
                   1192:                                m_freem(ext);
1.9       itojun   1193:                                ip6stat.ip6s_tooshort++;
                   1194:                                return;
                   1195:                        }
1.2       itojun   1196:
                   1197:                        /*
                   1198:                         * XXX: We copy whole the header even if a jumbo
                   1199:                         * payload option is included, which option is to
                   1200:                         * be removed before returning in the RFC 2292.
1.85      rpaulo   1201:                         * Note: this constraint is removed in RFC3542.
1.2       itojun   1202:                         */
1.97      christos 1203:                        *mp = sbcreatecontrol((void *)hbh, hbhlen,
1.85      rpaulo   1204:                            IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS),
                   1205:                            IPPROTO_IPV6);
1.2       itojun   1206:                        if (*mp)
                   1207:                                mp = &(*mp)->m_next;
1.62      itojun   1208:                        m_freem(ext);
1.2       itojun   1209:                }
                   1210:        }
                   1211:
                   1212:        /* IPV6_DSTOPTS and IPV6_RTHDR socket options */
                   1213:        if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) {
1.78      christos 1214:                struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *);
                   1215:                int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr);
1.2       itojun   1216:
                   1217:                /*
                   1218:                 * Search for destination options headers or routing
                   1219:                 * header(s) through the header chain, and stores each
                   1220:                 * header as ancillary data.
                   1221:                 * Note that the order of the headers remains in
                   1222:                 * the chain of ancillary data.
                   1223:                 */
1.86      rpaulo   1224:                for (;;) {      /* is explicit loop prevention necessary? */
1.62      itojun   1225:                        struct ip6_ext *ip6e = NULL;
1.9       itojun   1226:                        int elen;
1.62      itojun   1227:                        struct mbuf *ext = NULL;
1.9       itojun   1228:
1.62      itojun   1229:                        /*
                   1230:                         * if it is not an extension header, don't try to
                   1231:                         * pull it from the chain.
                   1232:                         */
                   1233:                        switch (nxt) {
                   1234:                        case IPPROTO_DSTOPTS:
                   1235:                        case IPPROTO_ROUTING:
                   1236:                        case IPPROTO_HOPOPTS:
                   1237:                        case IPPROTO_AH: /* is it possible? */
                   1238:                                break;
                   1239:                        default:
                   1240:                                goto loopend;
                   1241:                        }
                   1242:
                   1243:                        ext = ip6_pullexthdr(m, off, nxt);
                   1244:                        if (ext == NULL) {
1.9       itojun   1245:                                ip6stat.ip6s_tooshort++;
                   1246:                                return;
                   1247:                        }
1.62      itojun   1248:                        ip6e = mtod(ext, struct ip6_ext *);
1.9       itojun   1249:                        if (nxt == IPPROTO_AH)
                   1250:                                elen = (ip6e->ip6e_len + 2) << 2;
                   1251:                        else
                   1252:                                elen = (ip6e->ip6e_len + 1) << 3;
1.62      itojun   1253:                        if (elen != ext->m_len) {
                   1254:                                m_freem(ext);
1.9       itojun   1255:                                ip6stat.ip6s_tooshort++;
                   1256:                                return;
                   1257:                        }
1.57      thorpej  1258:                        KASSERT(IP6_HDR_ALIGNED_P(ip6e));
1.2       itojun   1259:
1.35      itojun   1260:                        switch (nxt) {
1.62      itojun   1261:                        case IPPROTO_DSTOPTS:
1.35      itojun   1262:                                if (!in6p->in6p_flags & IN6P_DSTOPTS)
                   1263:                                        break;
                   1264:
1.97      christos 1265:                                *mp = sbcreatecontrol((void *)ip6e, elen,
1.85      rpaulo   1266:                                    IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS),
                   1267:                                    IPPROTO_IPV6);
1.35      itojun   1268:                                if (*mp)
                   1269:                                        mp = &(*mp)->m_next;
                   1270:                                break;
                   1271:
                   1272:                        case IPPROTO_ROUTING:
                   1273:                                if (!in6p->in6p_flags & IN6P_RTHDR)
                   1274:                                        break;
                   1275:
1.97      christos 1276:                                *mp = sbcreatecontrol((void *)ip6e, elen,
1.85      rpaulo   1277:                                    IS2292(IPV6_2292RTHDR, IPV6_RTHDR),
                   1278:                                    IPPROTO_IPV6);
1.35      itojun   1279:                                if (*mp)
                   1280:                                        mp = &(*mp)->m_next;
                   1281:                                break;
                   1282:
1.62      itojun   1283:                        case IPPROTO_HOPOPTS:
                   1284:                        case IPPROTO_AH: /* is it possible? */
                   1285:                                break;
                   1286:
1.35      itojun   1287:                        default:
                   1288:                                /*
1.62      itojun   1289:                                 * other cases have been filtered in the above.
                   1290:                                 * none will visit this case.  here we supply
                   1291:                                 * the code just in case (nxt overwritten or
                   1292:                                 * other cases).
1.35      itojun   1293:                                 */
1.62      itojun   1294:                                m_freem(ext);
1.35      itojun   1295:                                goto loopend;
                   1296:
1.2       itojun   1297:                        }
                   1298:
                   1299:                        /* proceed with the next header. */
1.9       itojun   1300:                        off += elen;
1.2       itojun   1301:                        nxt = ip6e->ip6e_nxt;
1.62      itojun   1302:                        ip6e = NULL;
                   1303:                        m_freem(ext);
                   1304:                        ext = NULL;
1.2       itojun   1305:                }
                   1306:          loopend:
1.62      itojun   1307:                ;
1.2       itojun   1308:        }
1.62      itojun   1309: }
1.85      rpaulo   1310: #undef IS2292
                   1311:
                   1312:
                   1313: void
1.95      dyoung   1314: ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst,
                   1315:     uint32_t *mtu)
1.85      rpaulo   1316: {
                   1317:        struct socket *so;
                   1318:        struct mbuf *m_mtu;
                   1319:        struct ip6_mtuinfo mtuctl;
                   1320:
                   1321:        so = in6p->in6p_socket;
                   1322:
                   1323:        if (mtu == NULL)
                   1324:                return;
                   1325:
                   1326: #ifdef DIAGNOSTIC
                   1327:        if (so == NULL)         /* I believe this is impossible */
                   1328:                panic("ip6_notify_pmtu: socket is NULL");
                   1329: #endif
                   1330:
                   1331:        memset(&mtuctl, 0, sizeof(mtuctl));     /* zero-clear for safety */
                   1332:        mtuctl.ip6m_mtu = *mtu;
                   1333:        mtuctl.ip6m_addr = *dst;
                   1334:        if (sa6_recoverscope(&mtuctl.ip6m_addr))
                   1335:                return;
                   1336:
1.97      christos 1337:        if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl),
1.85      rpaulo   1338:            IPV6_PATHMTU, IPPROTO_IPV6)) == NULL)
                   1339:                return;
                   1340:
1.95      dyoung   1341:        if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu)
1.85      rpaulo   1342:            == 0) {
                   1343:                m_freem(m_mtu);
                   1344:                /* XXX: should count statistics */
                   1345:        } else
                   1346:                sorwakeup(so);
                   1347:
                   1348:        return;
                   1349: }
1.62      itojun   1350:
                   1351: /*
                   1352:  * pull single extension header from mbuf chain.  returns single mbuf that
                   1353:  * contains the result, or NULL on error.
                   1354:  */
                   1355: static struct mbuf *
                   1356: ip6_pullexthdr(m, off, nxt)
                   1357:        struct mbuf *m;
                   1358:        size_t off;
                   1359:        int nxt;
                   1360: {
                   1361:        struct ip6_ext ip6e;
                   1362:        size_t elen;
                   1363:        struct mbuf *n;
                   1364:
                   1365: #ifdef DIAGNOSTIC
                   1366:        switch (nxt) {
                   1367:        case IPPROTO_DSTOPTS:
                   1368:        case IPPROTO_ROUTING:
                   1369:        case IPPROTO_HOPOPTS:
                   1370:        case IPPROTO_AH: /* is it possible? */
                   1371:                break;
                   1372:        default:
                   1373:                printf("ip6_pullexthdr: invalid nxt=%d\n", nxt);
1.2       itojun   1374:        }
1.62      itojun   1375: #endif
1.2       itojun   1376:
1.97      christos 1377:        m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.62      itojun   1378:        if (nxt == IPPROTO_AH)
                   1379:                elen = (ip6e.ip6e_len + 2) << 2;
                   1380:        else
                   1381:                elen = (ip6e.ip6e_len + 1) << 3;
                   1382:
                   1383:        MGET(n, M_DONTWAIT, MT_DATA);
                   1384:        if (n && elen >= MLEN) {
                   1385:                MCLGET(n, M_DONTWAIT);
                   1386:                if ((n->m_flags & M_EXT) == 0) {
                   1387:                        m_free(n);
                   1388:                        n = NULL;
                   1389:                }
                   1390:        }
                   1391:        if (!n)
                   1392:                return NULL;
                   1393:
                   1394:        n->m_len = 0;
                   1395:        if (elen >= M_TRAILINGSPACE(n)) {
                   1396:                m_free(n);
                   1397:                return NULL;
                   1398:        }
                   1399:
1.97      christos 1400:        m_copydata(m, off, elen, mtod(n, void *));
1.62      itojun   1401:        n->m_len = elen;
                   1402:        return n;
1.2       itojun   1403: }
                   1404:
                   1405: /*
                   1406:  * Get pointer to the previous header followed by the header
                   1407:  * currently processed.
                   1408:  * XXX: This function supposes that
                   1409:  *     M includes all headers,
                   1410:  *     the next header field and the header length field of each header
                   1411:  *     are valid, and
                   1412:  *     the sum of each header length equals to OFF.
                   1413:  * Because of these assumptions, this function must be called very
                   1414:  * carefully. Moreover, it will not be used in the near future when
                   1415:  * we develop `neater' mechanism to process extension headers.
                   1416:  */
1.58      itojun   1417: u_int8_t *
1.2       itojun   1418: ip6_get_prevhdr(m, off)
                   1419:        struct mbuf *m;
                   1420:        int off;
                   1421: {
                   1422:        struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
                   1423:
                   1424:        if (off == sizeof(struct ip6_hdr))
1.58      itojun   1425:                return (&ip6->ip6_nxt);
1.2       itojun   1426:        else {
                   1427:                int len, nxt;
                   1428:                struct ip6_ext *ip6e = NULL;
                   1429:
                   1430:                nxt = ip6->ip6_nxt;
                   1431:                len = sizeof(struct ip6_hdr);
                   1432:                while (len < off) {
1.97      christos 1433:                        ip6e = (struct ip6_ext *)(mtod(m, char *) + len);
1.2       itojun   1434:
1.35      itojun   1435:                        switch (nxt) {
1.2       itojun   1436:                        case IPPROTO_FRAGMENT:
                   1437:                                len += sizeof(struct ip6_frag);
                   1438:                                break;
                   1439:                        case IPPROTO_AH:
                   1440:                                len += (ip6e->ip6e_len + 2) << 2;
                   1441:                                break;
                   1442:                        default:
                   1443:                                len += (ip6e->ip6e_len + 1) << 3;
                   1444:                                break;
                   1445:                        }
                   1446:                        nxt = ip6e->ip6e_nxt;
                   1447:                }
                   1448:                if (ip6e)
1.58      itojun   1449:                        return (&ip6e->ip6e_nxt);
1.2       itojun   1450:                else
                   1451:                        return NULL;
1.18      itojun   1452:        }
                   1453: }
                   1454:
                   1455: /*
                   1456:  * get next header offset.  m will be retained.
                   1457:  */
                   1458: int
                   1459: ip6_nexthdr(m, off, proto, nxtp)
                   1460:        struct mbuf *m;
                   1461:        int off;
                   1462:        int proto;
                   1463:        int *nxtp;
                   1464: {
                   1465:        struct ip6_hdr ip6;
                   1466:        struct ip6_ext ip6e;
                   1467:        struct ip6_frag fh;
                   1468:
                   1469:        /* just in case */
                   1470:        if (m == NULL)
                   1471:                panic("ip6_nexthdr: m == NULL");
                   1472:        if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off)
                   1473:                return -1;
                   1474:
                   1475:        switch (proto) {
                   1476:        case IPPROTO_IPV6:
1.83      rpaulo   1477:                /* do not chase beyond intermediate IPv6 headers */
                   1478:                if (off != 0)
                   1479:                        return -1;
1.18      itojun   1480:                if (m->m_pkthdr.len < off + sizeof(ip6))
                   1481:                        return -1;
1.97      christos 1482:                m_copydata(m, off, sizeof(ip6), (void *)&ip6);
1.18      itojun   1483:                if (nxtp)
                   1484:                        *nxtp = ip6.ip6_nxt;
                   1485:                off += sizeof(ip6);
                   1486:                return off;
                   1487:
                   1488:        case IPPROTO_FRAGMENT:
                   1489:                /*
                   1490:                 * terminate parsing if it is not the first fragment,
                   1491:                 * it does not make sense to parse through it.
                   1492:                 */
                   1493:                if (m->m_pkthdr.len < off + sizeof(fh))
                   1494:                        return -1;
1.97      christos 1495:                m_copydata(m, off, sizeof(fh), (void *)&fh);
1.67      itojun   1496:                if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0)
1.18      itojun   1497:                        return -1;
                   1498:                if (nxtp)
                   1499:                        *nxtp = fh.ip6f_nxt;
                   1500:                off += sizeof(struct ip6_frag);
                   1501:                return off;
                   1502:
                   1503:        case IPPROTO_AH:
                   1504:                if (m->m_pkthdr.len < off + sizeof(ip6e))
                   1505:                        return -1;
1.97      christos 1506:                m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18      itojun   1507:                if (nxtp)
                   1508:                        *nxtp = ip6e.ip6e_nxt;
                   1509:                off += (ip6e.ip6e_len + 2) << 2;
1.47      itojun   1510:                if (m->m_pkthdr.len < off)
                   1511:                        return -1;
1.18      itojun   1512:                return off;
                   1513:
                   1514:        case IPPROTO_HOPOPTS:
                   1515:        case IPPROTO_ROUTING:
                   1516:        case IPPROTO_DSTOPTS:
                   1517:                if (m->m_pkthdr.len < off + sizeof(ip6e))
                   1518:                        return -1;
1.97      christos 1519:                m_copydata(m, off, sizeof(ip6e), (void *)&ip6e);
1.18      itojun   1520:                if (nxtp)
                   1521:                        *nxtp = ip6e.ip6e_nxt;
                   1522:                off += (ip6e.ip6e_len + 1) << 3;
1.47      itojun   1523:                if (m->m_pkthdr.len < off)
                   1524:                        return -1;
1.18      itojun   1525:                return off;
                   1526:
                   1527:        case IPPROTO_NONE:
                   1528:        case IPPROTO_ESP:
                   1529:        case IPPROTO_IPCOMP:
                   1530:                /* give up */
                   1531:                return -1;
                   1532:
                   1533:        default:
                   1534:                return -1;
                   1535:        }
                   1536: }
                   1537:
                   1538: /*
                   1539:  * get offset for the last header in the chain.  m will be kept untainted.
                   1540:  */
                   1541: int
                   1542: ip6_lasthdr(m, off, proto, nxtp)
                   1543:        struct mbuf *m;
                   1544:        int off;
                   1545:        int proto;
                   1546:        int *nxtp;
                   1547: {
                   1548:        int newoff;
                   1549:        int nxt;
                   1550:
                   1551:        if (!nxtp) {
                   1552:                nxt = -1;
                   1553:                nxtp = &nxt;
                   1554:        }
1.86      rpaulo   1555:        for (;;) {
1.18      itojun   1556:                newoff = ip6_nexthdr(m, off, proto, nxtp);
                   1557:                if (newoff < 0)
                   1558:                        return off;
                   1559:                else if (newoff < off)
                   1560:                        return -1;      /* invalid */
                   1561:                else if (newoff == off)
                   1562:                        return newoff;
                   1563:
                   1564:                off = newoff;
                   1565:                proto = *nxtp;
1.2       itojun   1566:        }
                   1567: }
                   1568:
1.81      rpaulo   1569: struct m_tag *
                   1570: ip6_addaux(m)
                   1571:        struct mbuf *m;
                   1572: {
                   1573:        struct m_tag *mtag;
                   1574:
                   1575:        mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
                   1576:        if (!mtag) {
                   1577:                mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux),
                   1578:                    M_NOWAIT);
                   1579:                if (mtag) {
                   1580:                        m_tag_prepend(m, mtag);
                   1581:                        bzero(mtag + 1, sizeof(struct ip6aux));
                   1582:                }
                   1583:        }
                   1584:        return mtag;
                   1585: }
                   1586:
                   1587: struct m_tag *
                   1588: ip6_findaux(m)
                   1589:        struct mbuf *m;
                   1590: {
                   1591:        struct m_tag *mtag;
                   1592:
                   1593:        mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
                   1594:        return mtag;
                   1595: }
                   1596:
                   1597: void
                   1598: ip6_delaux(m)
                   1599:        struct mbuf *m;
                   1600: {
                   1601:        struct m_tag *mtag;
                   1602:
                   1603:        mtag = m_tag_find(m, PACKET_TAG_INET6, NULL);
                   1604:        if (mtag)
                   1605:                m_tag_delete(m, mtag);
                   1606: }
                   1607:
1.98      liamjfoy 1608: #ifdef GATEWAY
                   1609: /*
                   1610:  * sysctl helper routine for net.inet.ip6.maxflows. Since
                   1611:  * we could reduce this value, call ip6flow_reap();
                   1612:  */
                   1613: static int
                   1614: sysctl_net_inet_ip6_maxflows(SYSCTLFN_ARGS)
                   1615: {
                   1616:         int s;
                   1617:
                   1618:         s = sysctl_lookup(SYSCTLFN_CALL(rnode));
                   1619:         if (s)
                   1620:                 return (s);
                   1621:
                   1622:         s = splsoftnet();
                   1623:         ip6flow_reap(0);
                   1624:         splx(s);
                   1625:
                   1626:         return (0);
                   1627: }
1.99    ! liamjfoy 1628:
        !          1629: static int
        !          1630: sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS)
        !          1631: {
        !          1632:        int error, tmp;
        !          1633:        struct sysctlnode node;
        !          1634:
        !          1635:        node = *rnode;
        !          1636:        tmp = ip6_hashsize;
        !          1637:        node.sysctl_data = &tmp;
        !          1638:        error = sysctl_lookup(SYSCTLFN_CALL(&node));
        !          1639:        if (error || newp == NULL)
        !          1640:                return (error);
        !          1641:
        !          1642:        if ((tmp & (tmp - 1)) == 0 && tmp != 0) {
        !          1643:                /*
        !          1644:                 * Can only fail due to malloc()
        !          1645:                 */
        !          1646:                if (ip6flow_invalidate_all(tmp))
        !          1647:                        return ENOMEM;
        !          1648:        } else {
        !          1649:                /*
        !          1650:                 * EINVAL if not a power of 2
        !          1651:                 */
        !          1652:                return EINVAL;
        !          1653:        }
        !          1654:
        !          1655:        return (0);
        !          1656: }
1.98      liamjfoy 1657: #endif /* GATEWAY */
                   1658:
1.2       itojun   1659: /*
                   1660:  * System control for IP6
                   1661:  */
                   1662:
                   1663: u_char inet6ctlerrmap[PRC_NCMDS] = {
                   1664:        0,              0,              0,              0,
                   1665:        0,              EMSGSIZE,       EHOSTDOWN,      EHOSTUNREACH,
                   1666:        EHOSTUNREACH,   EHOSTUNREACH,   ECONNREFUSED,   ECONNREFUSED,
                   1667:        EMSGSIZE,       EHOSTUNREACH,   0,              0,
                   1668:        0,              0,              0,              0,
                   1669:        ENOPROTOOPT
                   1670: };
                   1671:
1.70      atatat   1672: SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup")
1.2       itojun   1673: {
1.85      rpaulo   1674: #ifdef RFC2292
                   1675: #define IS2292(x, y)   ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y))
                   1676: #else
                   1677: #define IS2292(x, y)   (y)
                   1678: #endif
1.26      itojun   1679:
1.73      atatat   1680:        sysctl_createv(clog, 0, NULL, NULL,
                   1681:                       CTLFLAG_PERMANENT,
1.70      atatat   1682:                       CTLTYPE_NODE, "net", NULL,
                   1683:                       NULL, 0, NULL, 0,
                   1684:                       CTL_NET, CTL_EOL);
1.73      atatat   1685:        sysctl_createv(clog, 0, NULL, NULL,
                   1686:                       CTLFLAG_PERMANENT,
1.74      atatat   1687:                       CTLTYPE_NODE, "inet6",
                   1688:                       SYSCTL_DESCR("PF_INET6 related settings"),
1.70      atatat   1689:                       NULL, 0, NULL, 0,
                   1690:                       CTL_NET, PF_INET6, CTL_EOL);
1.73      atatat   1691:        sysctl_createv(clog, 0, NULL, NULL,
                   1692:                       CTLFLAG_PERMANENT,
1.74      atatat   1693:                       CTLTYPE_NODE, "ip6",
                   1694:                       SYSCTL_DESCR("IPv6 related settings"),
1.70      atatat   1695:                       NULL, 0, NULL, 0,
                   1696:                       CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL);
                   1697:
1.73      atatat   1698:        sysctl_createv(clog, 0, NULL, NULL,
                   1699:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1700:                       CTLTYPE_INT, "forwarding",
                   1701:                       SYSCTL_DESCR("Enable forwarding of INET6 datagrams"),
1.70      atatat   1702:                       NULL, 0, &ip6_forwarding, 0,
                   1703:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1704:                       IPV6CTL_FORWARDING, CTL_EOL);
1.73      atatat   1705:        sysctl_createv(clog, 0, NULL, NULL,
                   1706:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1707:                       CTLTYPE_INT, "redirect",
                   1708:                       SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"),
1.70      atatat   1709:                       NULL, 0, &ip6_sendredirects, 0,
                   1710:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1711:                       IPV6CTL_SENDREDIRECTS, CTL_EOL);
1.73      atatat   1712:        sysctl_createv(clog, 0, NULL, NULL,
                   1713:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1714:                       CTLTYPE_INT, "hlim",
                   1715:                       SYSCTL_DESCR("Hop limit for an INET6 datagram"),
1.70      atatat   1716:                       NULL, 0, &ip6_defhlim, 0,
                   1717:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1718:                       IPV6CTL_DEFHLIM, CTL_EOL);
                   1719: #ifdef notyet
1.73      atatat   1720:        sysctl_createv(clog, 0, NULL, NULL,
                   1721:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70      atatat   1722:                       CTLTYPE_INT, "mtu", NULL,
                   1723:                       NULL, 0, &, 0,
                   1724:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1725:                       IPV6CTL_DEFMTU, CTL_EOL);
                   1726: #endif
                   1727: #ifdef __no_idea__
1.73      atatat   1728:        sysctl_createv(clog, 0, NULL, NULL,
                   1729:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70      atatat   1730:                       CTLTYPE_INT, "forwsrcrt", NULL,
                   1731:                       NULL, 0, &?, 0,
                   1732:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1733:                       IPV6CTL_FORWSRCRT, CTL_EOL);
1.73      atatat   1734:        sysctl_createv(clog, 0, NULL, NULL,
                   1735:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70      atatat   1736:                       CTLTYPE_STRUCT, "mrtstats", NULL,
                   1737:                       NULL, 0, &?, sizeof(?),
                   1738:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1739:                       IPV6CTL_MRTSTATS, CTL_EOL);
1.73      atatat   1740:        sysctl_createv(clog, 0, NULL, NULL,
                   1741:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70      atatat   1742:                       CTLTYPE_?, "mrtproto", NULL,
                   1743:                       NULL, 0, &?, sizeof(?),
                   1744:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1745:                       IPV6CTL_MRTPROTO, CTL_EOL);
                   1746: #endif
1.73      atatat   1747:        sysctl_createv(clog, 0, NULL, NULL,
                   1748:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1749:                       CTLTYPE_INT, "maxfragpackets",
                   1750:                       SYSCTL_DESCR("Maximum number of fragments to buffer "
                   1751:                                    "for reassembly"),
1.70      atatat   1752:                       NULL, 0, &ip6_maxfragpackets, 0,
                   1753:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1754:                       IPV6CTL_MAXFRAGPACKETS, CTL_EOL);
                   1755: #ifdef __no_idea__
1.73      atatat   1756:        sysctl_createv(clog, 0, NULL, NULL,
                   1757:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70      atatat   1758:                       CTLTYPE_INT, "sourcecheck", NULL,
                   1759:                       NULL, 0, &?, 0,
                   1760:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1761:                       IPV6CTL_SOURCECHECK, CTL_EOL);
1.73      atatat   1762:        sysctl_createv(clog, 0, NULL, NULL,
                   1763:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70      atatat   1764:                       CTLTYPE_INT, "sourcecheck_logint", NULL,
                   1765:                       NULL, 0, &?, 0,
                   1766:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1767:                       IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL);
                   1768: #endif
1.73      atatat   1769:        sysctl_createv(clog, 0, NULL, NULL,
                   1770:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1771:                       CTLTYPE_INT, "accept_rtadv",
                   1772:                       SYSCTL_DESCR("Accept router advertisements"),
1.70      atatat   1773:                       NULL, 0, &ip6_accept_rtadv, 0,
                   1774:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1775:                       IPV6CTL_ACCEPT_RTADV, CTL_EOL);
1.73      atatat   1776:        sysctl_createv(clog, 0, NULL, NULL,
                   1777:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1778:                       CTLTYPE_INT, "keepfaith",
                   1779:                       SYSCTL_DESCR("Activate faith interface"),
1.70      atatat   1780:                       NULL, 0, &ip6_keepfaith, 0,
                   1781:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1782:                       IPV6CTL_KEEPFAITH, CTL_EOL);
1.73      atatat   1783:        sysctl_createv(clog, 0, NULL, NULL,
                   1784:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1785:                       CTLTYPE_INT, "log_interval",
                   1786:                       SYSCTL_DESCR("Minumum interval between logging "
                   1787:                                    "unroutable packets"),
1.70      atatat   1788:                       NULL, 0, &ip6_log_interval, 0,
                   1789:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1790:                       IPV6CTL_LOG_INTERVAL, CTL_EOL);
1.73      atatat   1791:        sysctl_createv(clog, 0, NULL, NULL,
                   1792:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1793:                       CTLTYPE_INT, "hdrnestlimit",
                   1794:                       SYSCTL_DESCR("Maximum number of nested IPv6 headers"),
1.70      atatat   1795:                       NULL, 0, &ip6_hdrnestlimit, 0,
                   1796:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1797:                       IPV6CTL_HDRNESTLIMIT, CTL_EOL);
1.73      atatat   1798:        sysctl_createv(clog, 0, NULL, NULL,
                   1799:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1800:                       CTLTYPE_INT, "dad_count",
                   1801:                       SYSCTL_DESCR("Number of Duplicate Address Detection "
                   1802:                                    "probes to send"),
1.70      atatat   1803:                       NULL, 0, &ip6_dad_count, 0,
                   1804:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1805:                       IPV6CTL_DAD_COUNT, CTL_EOL);
1.73      atatat   1806:        sysctl_createv(clog, 0, NULL, NULL,
                   1807:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1808:                       CTLTYPE_INT, "auto_flowlabel",
                   1809:                       SYSCTL_DESCR("Assign random IPv6 flow labels"),
1.70      atatat   1810:                       NULL, 0, &ip6_auto_flowlabel, 0,
                   1811:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1812:                       IPV6CTL_AUTO_FLOWLABEL, CTL_EOL);
1.73      atatat   1813:        sysctl_createv(clog, 0, NULL, NULL,
                   1814:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1815:                       CTLTYPE_INT, "defmcasthlim",
                   1816:                       SYSCTL_DESCR("Default multicast hop limit"),
1.70      atatat   1817:                       NULL, 0, &ip6_defmcasthlim, 0,
                   1818:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1819:                       IPV6CTL_DEFMCASTHLIM, CTL_EOL);
1.51      itojun   1820: #if NGIF > 0
1.73      atatat   1821:        sysctl_createv(clog, 0, NULL, NULL,
                   1822:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1823:                       CTLTYPE_INT, "gifhlim",
                   1824:                       SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"),
1.70      atatat   1825:                       NULL, 0, &ip6_gif_hlim, 0,
                   1826:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1827:                       IPV6CTL_GIF_HLIM, CTL_EOL);
                   1828: #endif /* NGIF */
1.73      atatat   1829:        sysctl_createv(clog, 0, NULL, NULL,
                   1830:                       CTLFLAG_PERMANENT,
1.74      atatat   1831:                       CTLTYPE_STRING, "kame_version",
                   1832:                       SYSCTL_DESCR("KAME Version"),
1.78      christos 1833:                       NULL, 0, __UNCONST(__KAME_VERSION), 0,
1.70      atatat   1834:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1835:                       IPV6CTL_KAME_VERSION, CTL_EOL);
1.73      atatat   1836:        sysctl_createv(clog, 0, NULL, NULL,
                   1837:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1838:                       CTLTYPE_INT, "use_deprecated",
                   1839:                       SYSCTL_DESCR("Allow use of deprecated addresses as "
                   1840:                                    "source addresses"),
1.70      atatat   1841:                       NULL, 0, &ip6_use_deprecated, 0,
                   1842:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1843:                       IPV6CTL_USE_DEPRECATED, CTL_EOL);
1.73      atatat   1844:        sysctl_createv(clog, 0, NULL, NULL,
                   1845:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.70      atatat   1846:                       CTLTYPE_INT, "rr_prune", NULL,
                   1847:                       NULL, 0, &ip6_rr_prune, 0,
                   1848:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1849:                       IPV6CTL_RR_PRUNE, CTL_EOL);
1.73      atatat   1850:        sysctl_createv(clog, 0, NULL, NULL,
                   1851:                       CTLFLAG_PERMANENT
1.70      atatat   1852: #ifndef INET6_BINDV6ONLY
1.73      atatat   1853:                       |CTLFLAG_READWRITE,
1.70      atatat   1854: #endif
1.74      atatat   1855:                       CTLTYPE_INT, "v6only",
                   1856:                       SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting "
                   1857:                                    "to PF_INET sockets"),
1.70      atatat   1858:                       NULL, 0, &ip6_v6only, 0,
                   1859:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1860:                       IPV6CTL_V6ONLY, CTL_EOL);
1.73      atatat   1861:        sysctl_createv(clog, 0, NULL, NULL,
                   1862:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1863:                       CTLTYPE_INT, "anonportmin",
                   1864:                       SYSCTL_DESCR("Lowest ephemeral port number to assign"),
1.70      atatat   1865:                       sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0,
                   1866:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1867:                       IPV6CTL_ANONPORTMIN, CTL_EOL);
1.73      atatat   1868:        sysctl_createv(clog, 0, NULL, NULL,
                   1869:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1870:                       CTLTYPE_INT, "anonportmax",
                   1871:                       SYSCTL_DESCR("Highest ephemeral port number to assign"),
1.70      atatat   1872:                       sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0,
                   1873:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1874:                       IPV6CTL_ANONPORTMAX, CTL_EOL);
1.26      itojun   1875: #ifndef IPNOPRIVPORTS
1.73      atatat   1876:        sysctl_createv(clog, 0, NULL, NULL,
                   1877:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1878:                       CTLTYPE_INT, "lowportmin",
                   1879:                       SYSCTL_DESCR("Lowest privileged ephemeral port number "
                   1880:                                    "to assign"),
1.70      atatat   1881:                       sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0,
                   1882:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1883:                       IPV6CTL_LOWPORTMIN, CTL_EOL);
1.73      atatat   1884:        sysctl_createv(clog, 0, NULL, NULL,
                   1885:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1886:                       CTLTYPE_INT, "lowportmax",
                   1887:                       SYSCTL_DESCR("Highest privileged ephemeral port number "
                   1888:                                    "to assign"),
1.70      atatat   1889:                       sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0,
                   1890:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1891:                       IPV6CTL_LOWPORTMAX, CTL_EOL);
                   1892: #endif /* IPNOPRIVPORTS */
1.73      atatat   1893:        sysctl_createv(clog, 0, NULL, NULL,
                   1894:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.83      rpaulo   1895:                       CTLTYPE_INT, "use_tempaddr",
                   1896:                       SYSCTL_DESCR("Use temporary address"),
                   1897:                       NULL, 0, &ip6_use_tempaddr, 0,
                   1898:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1899:                       CTL_CREATE, CTL_EOL);
                   1900:        sysctl_createv(clog, 0, NULL, NULL,
                   1901:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
                   1902:                       CTLTYPE_INT, "temppltime",
                   1903:                       SYSCTL_DESCR("preferred lifetime of a temporary address"),
                   1904:                       NULL, 0, &ip6_temp_preferred_lifetime, 0,
                   1905:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1906:                       CTL_CREATE, CTL_EOL);
                   1907:        sysctl_createv(clog, 0, NULL, NULL,
                   1908:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
                   1909:                       CTLTYPE_INT, "tempvltime",
                   1910:                       SYSCTL_DESCR("valid lifetime of a temporary address"),
                   1911:                       NULL, 0, &ip6_temp_valid_lifetime, 0,
                   1912:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1913:                       CTL_CREATE, CTL_EOL);
                   1914:        sysctl_createv(clog, 0, NULL, NULL,
                   1915:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
1.74      atatat   1916:                       CTLTYPE_INT, "maxfrags",
                   1917:                       SYSCTL_DESCR("Maximum fragments in reassembly queue"),
1.70      atatat   1918:                       NULL, 0, &ip6_maxfrags, 0,
                   1919:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1920:                       IPV6CTL_MAXFRAGS, CTL_EOL);
1.79      rpaulo   1921:        sysctl_createv(clog, 0, NULL, NULL,
                   1922:                       CTLFLAG_PERMANENT,
                   1923:                       CTLTYPE_STRUCT, "stats",
                   1924:                       SYSCTL_DESCR("IPv6 statistics"),
                   1925:                       NULL, 0, &ip6stat, sizeof(ip6stat),
                   1926:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1927:                       IPV6CTL_STATS, CTL_EOL);
1.81      rpaulo   1928:        sysctl_createv(clog, 0, NULL, NULL,
                   1929:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
                   1930:                       CTLTYPE_INT, "use_defaultzone",
                   1931:                       SYSCTL_DESCR("Whether to use the default scope zones"),
                   1932:                       NULL, 0, &ip6_use_defzone, 0,
                   1933:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1934:                       IPV6CTL_USE_DEFAULTZONE, CTL_EOL);
1.83      rpaulo   1935:        sysctl_createv(clog, 0, NULL, NULL,
                   1936:                       CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
                   1937:                       CTLTYPE_INT, "mcast_pmtu",
                   1938:                       SYSCTL_DESCR("Enable pMTU discovery for multicast packet"),
                   1939:                       NULL, 0, &ip6_mcast_pmtu, 0,
                   1940:                       CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1941:                       CTL_CREATE, CTL_EOL);
1.98      liamjfoy 1942: #ifdef GATEWAY
                   1943:        sysctl_createv(clog, 0, NULL, NULL,
                   1944:                        CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
                   1945:                        CTLTYPE_INT, "maxflows",
                   1946:                        SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"),
                   1947:                        sysctl_net_inet_ip6_maxflows, 0, &ip6_maxflows, 0,
                   1948:                        CTL_NET, PF_INET6, IPPROTO_IPV6,
                   1949:                        CTL_CREATE, CTL_EOL);
1.99    ! liamjfoy 1950:        sysctl_createv(clog, 0, NULL, NULL,
        !          1951:                        CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
        !          1952:                        CTLTYPE_INT, "hashsize",
        !          1953:                        SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"),
        !          1954:                        sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0,
        !          1955:                        CTL_NET, PF_INET6, IPPROTO_IPV6,
        !          1956:                        CTL_CREATE, CTL_EOL);
1.98      liamjfoy 1957: #endif
1.2       itojun   1958: }

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