| version 1.109.8.1, 2007/07/19 20:48:56 |
version 1.109.8.2, 2007/07/19 20:48:57 |
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|
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/* $NetBSD$ */ |
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/* $KAME: ip6_input.c,v 1.188 2001/03/29 05:34:31 itojun Exp $ */ |
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|
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/* |
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the project nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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|
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/* |
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* Copyright (c) 1982, 1986, 1988, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
| |
* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
| |
* notice, this list of conditions and the following disclaimer in the |
| |
* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* @(#)ip_input.c 8.2 (Berkeley) 1/4/94 |
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*/ |
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|
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#include <sys/cdefs.h> |
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__KERNEL_RCSID(0, "$NetBSD$"); |
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|
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#include "opt_inet.h" |
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#include "opt_inet6.h" |
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#include "opt_ipsec.h" |
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#include "opt_pfil_hooks.h" |
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|
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#include <sys/param.h> |
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#include <sys/systm.h> |
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#include <sys/malloc.h> |
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#include <sys/mbuf.h> |
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#include <sys/domain.h> |
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#include <sys/protosw.h> |
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#include <sys/socket.h> |
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#include <sys/socketvar.h> |
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#include <sys/errno.h> |
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#include <sys/time.h> |
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#include <sys/kernel.h> |
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#include <sys/syslog.h> |
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#include <sys/proc.h> |
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#include <sys/sysctl.h> |
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|
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#include <net/if.h> |
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#include <net/if_types.h> |
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#include <net/if_dl.h> |
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#include <net/route.h> |
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#include <net/netisr.h> |
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#ifdef PFIL_HOOKS |
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#include <net/pfil.h> |
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#endif |
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|
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#include <netinet/in.h> |
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#include <netinet/in_systm.h> |
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#ifdef INET |
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#include <netinet/ip.h> |
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#include <netinet/ip_icmp.h> |
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#endif /* INET */ |
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#include <netinet/ip6.h> |
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#include <netinet6/in6_var.h> |
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#include <netinet6/ip6_var.h> |
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#include <netinet6/in6_pcb.h> |
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#include <netinet/icmp6.h> |
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#include <netinet6/scope6_var.h> |
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#include <netinet6/in6_ifattach.h> |
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#include <netinet6/nd6.h> |
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|
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#ifdef IPSEC |
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#include <netinet6/ipsec.h> |
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#endif |
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|
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#ifdef FAST_IPSEC |
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#include <netipsec/ipsec.h> |
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#include <netipsec/ipsec6.h> |
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#include <netipsec/key.h> |
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#endif /* FAST_IPSEC */ |
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|
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#include <netinet6/ip6protosw.h> |
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|
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#include "faith.h" |
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#include "gif.h" |
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|
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#if NGIF > 0 |
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#include <netinet6/in6_gif.h> |
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#endif |
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|
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#include <net/net_osdep.h> |
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|
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extern struct domain inet6domain; |
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|
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u_char ip6_protox[IPPROTO_MAX]; |
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static int ip6qmaxlen = IFQ_MAXLEN; |
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struct in6_ifaddr *in6_ifaddr; |
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struct ifqueue ip6intrq; |
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|
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extern callout_t in6_tmpaddrtimer_ch; |
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|
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int ip6_forward_srcrt; /* XXX */ |
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int ip6_sourcecheck; /* XXX */ |
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int ip6_sourcecheck_interval; /* XXX */ |
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|
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#ifdef PFIL_HOOKS |
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struct pfil_head inet6_pfil_hook; |
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#endif |
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|
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struct ip6stat ip6stat; |
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|
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static void ip6_init2 __P((void *)); |
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static struct m_tag *ip6_setdstifaddr __P((struct mbuf *, struct in6_ifaddr *)); |
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|
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static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *)); |
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static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int)); |
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|
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/* |
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* IP6 initialization: fill in IP6 protocol switch table. |
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* All protocols not implemented in kernel go to raw IP6 protocol handler. |
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*/ |
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void |
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ip6_init() |
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{ |
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const struct ip6protosw *pr; |
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int i; |
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|
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pr = (const struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW); |
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if (pr == 0) |
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panic("ip6_init"); |
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for (i = 0; i < IPPROTO_MAX; i++) |
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ip6_protox[i] = pr - inet6sw; |
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for (pr = (const struct ip6protosw *)inet6domain.dom_protosw; |
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pr < (const struct ip6protosw *)inet6domain.dom_protoswNPROTOSW; pr++) |
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if (pr->pr_domain->dom_family == PF_INET6 && |
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pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW) |
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ip6_protox[pr->pr_protocol] = pr - inet6sw; |
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ip6intrq.ifq_maxlen = ip6qmaxlen; |
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scope6_init(); |
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addrsel_policy_init(); |
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nd6_init(); |
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frag6_init(); |
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ip6_desync_factor = arc4random() % MAX_TEMP_DESYNC_FACTOR; |
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|
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ip6_init2((void *)0); |
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#ifdef GATEWAY |
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ip6flow_init(ip6_hashsize); |
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#endif |
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|
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#ifdef PFIL_HOOKS |
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/* Register our Packet Filter hook. */ |
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inet6_pfil_hook.ph_type = PFIL_TYPE_AF; |
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inet6_pfil_hook.ph_af = AF_INET6; |
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i = pfil_head_register(&inet6_pfil_hook); |
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if (i != 0) |
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printf("ip6_init: WARNING: unable to register pfil hook, " |
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"error %d\n", i); |
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#endif /* PFIL_HOOKS */ |
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} |
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|
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static void |
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ip6_init2(void *dummy) |
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{ |
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|
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/* nd6_timer_init */ |
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callout_init(&nd6_timer_ch, 0); |
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callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL); |
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|
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/* timer for regeneranation of temporary addresses randomize ID */ |
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callout_init(&in6_tmpaddrtimer_ch, 0); |
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callout_reset(&in6_tmpaddrtimer_ch, |
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(ip6_temp_preferred_lifetime - ip6_desync_factor - |
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ip6_temp_regen_advance) * hz, |
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in6_tmpaddrtimer, NULL); |
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} |
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|
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/* |
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* IP6 input interrupt handling. Just pass the packet to ip6_input. |
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*/ |
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void |
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ip6intr() |
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{ |
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int s; |
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struct mbuf *m; |
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|
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for (;;) { |
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s = splnet(); |
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IF_DEQUEUE(&ip6intrq, m); |
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splx(s); |
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if (m == 0) |
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return; |
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/* drop the packet if IPv6 operation is disabled on the IF */ |
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if ((ND_IFINFO(m->m_pkthdr.rcvif)->flags & ND6_IFF_IFDISABLED)) { |
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m_freem(m); |
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return; |
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} |
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ip6_input(m); |
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} |
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} |
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|
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extern struct route ip6_forward_rt; |
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|
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void |
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ip6_input(struct mbuf *m) |
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{ |
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struct ip6_hdr *ip6; |
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int hit, off = sizeof(struct ip6_hdr), nest; |
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u_int32_t plen; |
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u_int32_t rtalert = ~0; |
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int nxt, ours = 0, rh_present = 0; |
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struct ifnet *deliverifp = NULL; |
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int srcrt = 0; |
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const struct rtentry *rt; |
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union { |
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struct sockaddr dst; |
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struct sockaddr_in6 dst6; |
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} u; |
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#ifdef FAST_IPSEC |
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struct m_tag *mtag; |
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struct tdb_ident *tdbi; |
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struct secpolicy *sp; |
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int s, error; |
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#endif |
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|
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#ifdef IPSEC |
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/* |
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* should the inner packet be considered authentic? |
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* see comment in ah4_input(). |
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*/ |
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m->m_flags &= ~M_AUTHIPHDR; |
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m->m_flags &= ~M_AUTHIPDGM; |
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#endif |
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|
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/* |
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* make sure we don't have onion peering information into m_tag. |
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*/ |
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ip6_delaux(m); |
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|
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/* |
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* mbuf statistics |
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*/ |
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if (m->m_flags & M_EXT) { |
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if (m->m_next) |
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ip6stat.ip6s_mext2m++; |
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else |
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ip6stat.ip6s_mext1++; |
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} else { |
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#define M2MMAX __arraycount(ip6stat.ip6s_m2m) |
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if (m->m_next) { |
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if (m->m_flags & M_LOOP) { |
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ip6stat.ip6s_m2m[lo0ifp->if_index]++; /* XXX */ |
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} else if (m->m_pkthdr.rcvif->if_index < M2MMAX) |
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ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++; |
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else |
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ip6stat.ip6s_m2m[0]++; |
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} else |
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ip6stat.ip6s_m1++; |
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#undef M2MMAX |
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} |
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|
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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive); |
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ip6stat.ip6s_total++; |
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|
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/* |
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* If the IPv6 header is not aligned, slurp it up into a new |
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* mbuf with space for link headers, in the event we forward |
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* it. Otherwise, if it is aligned, make sure the entire base |
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* IPv6 header is in the first mbuf of the chain. |
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*/ |
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if (IP6_HDR_ALIGNED_P(mtod(m, void *)) == 0) { |
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struct ifnet *inifp = m->m_pkthdr.rcvif; |
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if ((m = m_copyup(m, sizeof(struct ip6_hdr), |
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(max_linkhdr + 3) & ~3)) == NULL) { |
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/* XXXJRT new stat, please */ |
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ip6stat.ip6s_toosmall++; |
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in6_ifstat_inc(inifp, ifs6_in_hdrerr); |
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return; |
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} |
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} else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) { |
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struct ifnet *inifp = m->m_pkthdr.rcvif; |
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if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) { |
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ip6stat.ip6s_toosmall++; |
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in6_ifstat_inc(inifp, ifs6_in_hdrerr); |
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return; |
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} |
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} |
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|
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ip6 = mtod(m, struct ip6_hdr *); |
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|
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if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { |
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ip6stat.ip6s_badvers++; |
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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr); |
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goto bad; |
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} |
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|
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#if defined(IPSEC) |
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/* IPv6 fast forwarding is not compatible with IPsec. */ |
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m->m_flags &= ~M_CANFASTFWD; |
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#else |
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/* |
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* Assume that we can create a fast-forward IP flow entry |
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* based on this packet. |
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*/ |
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m->m_flags |= M_CANFASTFWD; |
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#endif |
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|
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#ifdef PFIL_HOOKS |
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/* |
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* Run through list of hooks for input packets. If there are any |
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* filters which require that additional packets in the flow are |
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* not fast-forwarded, they must clear the M_CANFASTFWD flag. |
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* Note that filters must _never_ set this flag, as another filter |
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* in the list may have previously cleared it. |
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*/ |
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/* |
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* let ipfilter look at packet on the wire, |
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* not the decapsulated packet. |
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*/ |
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#ifdef IPSEC |
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if (!ipsec_getnhist(m)) |
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#elif defined(FAST_IPSEC) |
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if (!ipsec_indone(m)) |
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#else |
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if (1) |
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#endif |
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{ |
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struct in6_addr odst; |
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|
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odst = ip6->ip6_dst; |
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if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif, |
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PFIL_IN) != 0) |
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return; |
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if (m == NULL) |
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return; |
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ip6 = mtod(m, struct ip6_hdr *); |
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srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst); |
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} |
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#endif /* PFIL_HOOKS */ |
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|
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ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; |
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|
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#ifdef ALTQ |
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if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) { |
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/* packet is dropped by traffic conditioner */ |
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return; |
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} |
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#endif |
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|
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/* |
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* Check against address spoofing/corruption. |
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*/ |
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if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) || |
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IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) { |
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/* |
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* XXX: "badscope" is not very suitable for a multicast source. |
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*/ |
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ip6stat.ip6s_badscope++; |
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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
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goto bad; |
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} |
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/* |
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* The following check is not documented in specs. A malicious |
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* party may be able to use IPv4 mapped addr to confuse tcp/udp stack |
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* and bypass security checks (act as if it was from 127.0.0.1 by using |
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* IPv6 src ::ffff:127.0.0.1). Be cautious. |
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* |
| |
* This check chokes if we are in an SIIT cloud. As none of BSDs |
| |
* support IPv4-less kernel compilation, we cannot support SIIT |
| |
* environment at all. So, it makes more sense for us to reject any |
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* malicious packets for non-SIIT environment, than try to do a |
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* partial support for SIIT environment. |
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*/ |
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if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
| |
IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { |
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ip6stat.ip6s_badscope++; |
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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
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goto bad; |
| |
} |
| |
#if 0 |
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/* |
| |
* Reject packets with IPv4 compatible addresses (auto tunnel). |
| |
* |
| |
* The code forbids auto tunnel relay case in RFC1933 (the check is |
| |
* stronger than RFC1933). We may want to re-enable it if mech-xx |
| |
* is revised to forbid relaying case. |
| |
*/ |
| |
if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) || |
| |
IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) { |
| |
ip6stat.ip6s_badscope++; |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
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goto bad; |
| |
} |
| |
#endif |
| |
|
| |
/* |
| |
* Disambiguate address scope zones (if there is ambiguity). |
| |
* We first make sure that the original source or destination address |
| |
* is not in our internal form for scoped addresses. Such addresses |
| |
* are not necessarily invalid spec-wise, but we cannot accept them due |
| |
* to the usage conflict. |
| |
* in6_setscope() then also checks and rejects the cases where src or |
| |
* dst are the loopback address and the receiving interface |
| |
* is not loopback. |
| |
*/ |
| |
if (__predict_false( |
| |
m_makewritable(&m, 0, sizeof(struct ip6_hdr), M_DONTWAIT))) |
| |
goto bad; |
| |
ip6 = mtod(m, struct ip6_hdr *); |
| |
if (in6_clearscope(&ip6->ip6_src) || in6_clearscope(&ip6->ip6_dst)) { |
| |
ip6stat.ip6s_badscope++; /* XXX */ |
| |
goto bad; |
| |
} |
| |
if (in6_setscope(&ip6->ip6_src, m->m_pkthdr.rcvif, NULL) || |
| |
in6_setscope(&ip6->ip6_dst, m->m_pkthdr.rcvif, NULL)) { |
| |
ip6stat.ip6s_badscope++; |
| |
goto bad; |
| |
} |
| |
|
| |
/* |
| |
* Multicast check |
| |
*/ |
| |
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { |
| |
struct in6_multi *in6m = 0; |
| |
|
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mcast); |
| |
/* |
| |
* See if we belong to the destination multicast group on the |
| |
* arrival interface. |
| |
*/ |
| |
IN6_LOOKUP_MULTI(ip6->ip6_dst, m->m_pkthdr.rcvif, in6m); |
| |
if (in6m) |
| |
ours = 1; |
| |
else if (!ip6_mrouter) { |
| |
ip6stat.ip6s_notmember++; |
| |
ip6stat.ip6s_cantforward++; |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); |
| |
goto bad; |
| |
} |
| |
deliverifp = m->m_pkthdr.rcvif; |
| |
goto hbhcheck; |
| |
} |
| |
|
| |
sockaddr_in6_init(&u.dst6, &ip6->ip6_dst, 0, 0, 0); |
| |
|
| |
/* |
| |
* Unicast check |
| |
*/ |
| |
rt = rtcache_lookup2(&ip6_forward_rt, &u.dst, 1, &hit); |
| |
if (hit) |
| |
ip6stat.ip6s_forward_cachehit++; |
| |
else |
| |
ip6stat.ip6s_forward_cachemiss++; |
| |
|
| |
#define rt6_getkey(__rt) satocsin6(rt_getkey(__rt)) |
| |
|
| |
/* |
| |
* Accept the packet if the forwarding interface to the destination |
| |
* according to the routing table is the loopback interface, |
| |
* unless the associated route has a gateway. |
| |
* Note that this approach causes to accept a packet if there is a |
| |
* route to the loopback interface for the destination of the packet. |
| |
* But we think it's even useful in some situations, e.g. when using |
| |
* a special daemon which wants to intercept the packet. |
| |
*/ |
| |
if (rt != NULL && |
| |
(rt->rt_flags & (RTF_HOST|RTF_GATEWAY)) == RTF_HOST && |
| |
!(rt->rt_flags & RTF_CLONED) && |
| |
#if 0 |
| |
/* |
| |
* The check below is redundant since the comparison of |
| |
* the destination and the key of the rtentry has |
| |
* already done through looking up the routing table. |
| |
*/ |
| |
IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &rt6_getkey(rt)->sin6_addr) && |
| |
#endif |
| |
rt->rt_ifp->if_type == IFT_LOOP) { |
| |
struct in6_ifaddr *ia6 = (struct in6_ifaddr *)rt->rt_ifa; |
| |
if (ia6->ia6_flags & IN6_IFF_ANYCAST) |
| |
m->m_flags |= M_ANYCAST6; |
| |
/* |
| |
* packets to a tentative, duplicated, or somehow invalid |
| |
* address must not be accepted. |
| |
*/ |
| |
if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) { |
| |
/* this address is ready */ |
| |
ours = 1; |
| |
deliverifp = ia6->ia_ifp; /* correct? */ |
| |
goto hbhcheck; |
| |
} else { |
| |
/* address is not ready, so discard the packet. */ |
| |
nd6log((LOG_INFO, |
| |
"ip6_input: packet to an unready address %s->%s\n", |
| |
ip6_sprintf(&ip6->ip6_src), |
| |
ip6_sprintf(&ip6->ip6_dst))); |
| |
|
| |
goto bad; |
| |
} |
| |
} |
| |
|
| |
/* |
| |
* FAITH (Firewall Aided Internet Translator) |
| |
*/ |
| |
#if defined(NFAITH) && 0 < NFAITH |
| |
if (ip6_keepfaith) { |
| |
if (rt != NULL && rt->rt_ifp != NULL && |
| |
rt->rt_ifp->if_type == IFT_FAITH) { |
| |
/* XXX do we need more sanity checks? */ |
| |
ours = 1; |
| |
deliverifp = rt->rt_ifp; /* faith */ |
| |
goto hbhcheck; |
| |
} |
| |
} |
| |
#endif |
| |
|
| |
#if 0 |
| |
{ |
| |
/* |
| |
* Last resort: check in6_ifaddr for incoming interface. |
| |
* The code is here until I update the "goto ours hack" code above |
| |
* working right. |
| |
*/ |
| |
struct ifaddr *ifa; |
| |
TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) { |
| |
if (ifa->ifa_addr == NULL) |
| |
continue; /* just for safety */ |
| |
if (ifa->ifa_addr->sa_family != AF_INET6) |
| |
continue; |
| |
if (IN6_ARE_ADDR_EQUAL(IFA_IN6(ifa), &ip6->ip6_dst)) { |
| |
ours = 1; |
| |
deliverifp = ifa->ifa_ifp; |
| |
goto hbhcheck; |
| |
} |
| |
} |
| |
} |
| |
#endif |
| |
|
| |
/* |
| |
* Now there is no reason to process the packet if it's not our own |
| |
* and we're not a router. |
| |
*/ |
| |
if (!ip6_forwarding) { |
| |
ip6stat.ip6s_cantforward++; |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); |
| |
goto bad; |
| |
} |
| |
|
| |
hbhcheck: |
| |
/* |
| |
* record address information into m_tag, if we don't have one yet. |
| |
* note that we are unable to record it, if the address is not listed |
| |
* as our interface address (e.g. multicast addresses, addresses |
| |
* within FAITH prefixes and such). |
| |
*/ |
| |
if (deliverifp && !ip6_getdstifaddr(m)) { |
| |
struct in6_ifaddr *ia6; |
| |
|
| |
ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); |
| |
if (ia6) { |
| |
if (!ip6_setdstifaddr(m, ia6)) { |
| |
/* |
| |
* XXX maybe we should drop the packet here, |
| |
* as we could not provide enough information |
| |
* to the upper layers. |
| |
*/ |
| |
} |
| |
} |
| |
} |
| |
|
| |
/* |
| |
* Process Hop-by-Hop options header if it's contained. |
| |
* m may be modified in ip6_hopopts_input(). |
| |
* If a JumboPayload option is included, plen will also be modified. |
| |
*/ |
| |
plen = (u_int32_t)ntohs(ip6->ip6_plen); |
| |
if (ip6->ip6_nxt == IPPROTO_HOPOPTS) { |
| |
struct ip6_hbh *hbh; |
| |
|
| |
if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) { |
| |
#if 0 /*touches NULL pointer*/ |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); |
| |
#endif |
| |
return; /* m have already been freed */ |
| |
} |
| |
|
| |
/* adjust pointer */ |
| |
ip6 = mtod(m, struct ip6_hdr *); |
| |
|
| |
/* |
| |
* if the payload length field is 0 and the next header field |
| |
* indicates Hop-by-Hop Options header, then a Jumbo Payload |
| |
* option MUST be included. |
| |
*/ |
| |
if (ip6->ip6_plen == 0 && plen == 0) { |
| |
/* |
| |
* Note that if a valid jumbo payload option is |
| |
* contained, ip6_hopopts_input() must set a valid |
| |
* (non-zero) payload length to the variable plen. |
| |
*/ |
| |
ip6stat.ip6s_badoptions++; |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr); |
| |
icmp6_error(m, ICMP6_PARAM_PROB, |
| |
ICMP6_PARAMPROB_HEADER, |
| |
(char *)&ip6->ip6_plen - (char *)ip6); |
| |
return; |
| |
} |
| |
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr), |
| |
sizeof(struct ip6_hbh)); |
| |
if (hbh == NULL) { |
| |
ip6stat.ip6s_tooshort++; |
| |
return; |
| |
} |
| |
KASSERT(IP6_HDR_ALIGNED_P(hbh)); |
| |
nxt = hbh->ip6h_nxt; |
| |
|
| |
/* |
| |
* accept the packet if a router alert option is included |
| |
* and we act as an IPv6 router. |
| |
*/ |
| |
if (rtalert != ~0 && ip6_forwarding) |
| |
ours = 1; |
| |
} else |
| |
nxt = ip6->ip6_nxt; |
| |
|
| |
/* |
| |
* Check that the amount of data in the buffers |
| |
* is as at least much as the IPv6 header would have us expect. |
| |
* Trim mbufs if longer than we expect. |
| |
* Drop packet if shorter than we expect. |
| |
*/ |
| |
if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) { |
| |
ip6stat.ip6s_tooshort++; |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated); |
| |
goto bad; |
| |
} |
| |
if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) { |
| |
if (m->m_len == m->m_pkthdr.len) { |
| |
m->m_len = sizeof(struct ip6_hdr) + plen; |
| |
m->m_pkthdr.len = sizeof(struct ip6_hdr) + plen; |
| |
} else |
| |
m_adj(m, sizeof(struct ip6_hdr) + plen - m->m_pkthdr.len); |
| |
} |
| |
|
| |
/* |
| |
* Forward if desirable. |
| |
*/ |
| |
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { |
| |
/* |
| |
* If we are acting as a multicast router, all |
| |
* incoming multicast packets are passed to the |
| |
* kernel-level multicast forwarding function. |
| |
* The packet is returned (relatively) intact; if |
| |
* ip6_mforward() returns a non-zero value, the packet |
| |
* must be discarded, else it may be accepted below. |
| |
*/ |
| |
if (ip6_mrouter && ip6_mforward(ip6, m->m_pkthdr.rcvif, m)) { |
| |
ip6stat.ip6s_cantforward++; |
| |
m_freem(m); |
| |
return; |
| |
} |
| |
if (!ours) { |
| |
m_freem(m); |
| |
return; |
| |
} |
| |
} else if (!ours) { |
| |
ip6_forward(m, srcrt); |
| |
return; |
| |
} |
| |
|
| |
ip6 = mtod(m, struct ip6_hdr *); |
| |
|
| |
/* |
| |
* Malicious party may be able to use IPv4 mapped addr to confuse |
| |
* tcp/udp stack and bypass security checks (act as if it was from |
| |
* 127.0.0.1 by using IPv6 src ::ffff:127.0.0.1). Be cautious. |
| |
* |
| |
* For SIIT end node behavior, you may want to disable the check. |
| |
* However, you will become vulnerable to attacks using IPv4 mapped |
| |
* source. |
| |
*/ |
| |
if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
| |
IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { |
| |
ip6stat.ip6s_badscope++; |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
| |
goto bad; |
| |
} |
| |
|
| |
/* |
| |
* Tell launch routine the next header |
| |
*/ |
| |
#ifdef IFA_STATS |
| |
if (deliverifp != NULL) { |
| |
struct in6_ifaddr *ia6; |
| |
ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); |
| |
if (ia6) |
| |
ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len; |
| |
} |
| |
#endif |
| |
ip6stat.ip6s_delivered++; |
| |
in6_ifstat_inc(deliverifp, ifs6_in_deliver); |
| |
nest = 0; |
| |
|
| |
rh_present = 0; |
| |
while (nxt != IPPROTO_DONE) { |
| |
if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) { |
| |
ip6stat.ip6s_toomanyhdr++; |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr); |
| |
goto bad; |
| |
} |
| |
|
| |
/* |
| |
* protection against faulty packet - there should be |
| |
* more sanity checks in header chain processing. |
| |
*/ |
| |
if (m->m_pkthdr.len < off) { |
| |
ip6stat.ip6s_tooshort++; |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated); |
| |
goto bad; |
| |
} |
| |
|
| |
if (nxt == IPPROTO_ROUTING) { |
| |
if (rh_present++) { |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, |
| |
ifs6_in_hdrerr); |
| |
ip6stat.ip6s_badoptions++; |
| |
goto bad; |
| |
} |
| |
} |
| |
|
| |
#ifdef IPSEC |
| |
/* |
| |
* enforce IPsec policy checking if we are seeing last header. |
| |
* note that we do not visit this with protocols with pcb layer |
| |
* code - like udp/tcp/raw ip. |
| |
*/ |
| |
if ((inet6sw[ip6_protox[nxt]].pr_flags & PR_LASTHDR) != 0 && |
| |
ipsec6_in_reject(m, NULL)) { |
| |
ipsec6stat.in_polvio++; |
| |
goto bad; |
| |
} |
| |
#endif |
| |
#ifdef FAST_IPSEC |
| |
/* |
| |
* enforce IPsec policy checking if we are seeing last header. |
| |
* note that we do not visit this with protocols with pcb layer |
| |
* code - like udp/tcp/raw ip. |
| |
*/ |
| |
if ((inet6sw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0) { |
| |
/* |
| |
* Check if the packet has already had IPsec processing |
| |
* done. If so, then just pass it along. This tag gets |
| |
* set during AH, ESP, etc. input handling, before the |
| |
* packet is returned to the ip input queue for delivery. |
| |
*/ |
| |
mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL); |
| |
s = splsoftnet(); |
| |
if (mtag != NULL) { |
| |
tdbi = (struct tdb_ident *)(mtag + 1); |
| |
sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND); |
| |
} else { |
| |
sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND, |
| |
IP_FORWARDING, &error); |
| |
} |
| |
if (sp != NULL) { |
| |
/* |
| |
* Check security policy against packet attributes. |
| |
*/ |
| |
error = ipsec_in_reject(sp, m); |
| |
KEY_FREESP(&sp); |
| |
} else { |
| |
/* XXX error stat??? */ |
| |
error = EINVAL; |
| |
DPRINTF(("ip6_input: no SP, packet discarded\n"));/*XXX*/ |
| |
goto bad; |
| |
} |
| |
splx(s); |
| |
if (error) |
| |
goto bad; |
| |
} |
| |
#endif /* FAST_IPSEC */ |
| |
|
| |
|
| |
nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt); |
| |
} |
| |
return; |
| |
bad: |
| |
m_freem(m); |
| |
} |
| |
|
| |
/* |
| |
* set/grab in6_ifaddr correspond to IPv6 destination address. |
| |
*/ |
| |
static struct m_tag * |
| |
ip6_setdstifaddr(struct mbuf *m, struct in6_ifaddr *ia6) |
| |
{ |
| |
struct m_tag *mtag; |
| |
|
| |
mtag = ip6_addaux(m); |
| |
if (mtag) |
| |
((struct ip6aux *)(mtag + 1))->ip6a_dstia6 = ia6; |
| |
return mtag; /* NULL if failed to set */ |
| |
} |
| |
|
| |
struct in6_ifaddr * |
| |
ip6_getdstifaddr(struct mbuf *m) |
| |
{ |
| |
struct m_tag *mtag; |
| |
|
| |
mtag = ip6_findaux(m); |
| |
if (mtag) |
| |
return ((struct ip6aux *)(mtag + 1))->ip6a_dstia6; |
| |
else |
| |
return NULL; |
| |
} |
| |
|
| |
/* |
| |
* Hop-by-Hop options header processing. If a valid jumbo payload option is |
| |
* included, the real payload length will be stored in plenp. |
| |
* |
| |
* rtalertp - XXX: should be stored more smart way |
| |
*/ |
| |
static int |
| |
ip6_hopopts_input(u_int32_t *plenp, u_int32_t *rtalertp, |
| |
struct mbuf **mp, int *offp) |
| |
{ |
| |
struct mbuf *m = *mp; |
| |
int off = *offp, hbhlen; |
| |
struct ip6_hbh *hbh; |
| |
|
| |
/* validation of the length of the header */ |
| |
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, |
| |
sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); |
| |
if (hbh == NULL) { |
| |
ip6stat.ip6s_tooshort++; |
| |
return -1; |
| |
} |
| |
hbhlen = (hbh->ip6h_len + 1) << 3; |
| |
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr), |
| |
hbhlen); |
| |
if (hbh == NULL) { |
| |
ip6stat.ip6s_tooshort++; |
| |
return -1; |
| |
} |
| |
KASSERT(IP6_HDR_ALIGNED_P(hbh)); |
| |
off += hbhlen; |
| |
hbhlen -= sizeof(struct ip6_hbh); |
| |
|
| |
if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh), |
| |
hbhlen, rtalertp, plenp) < 0) |
| |
return (-1); |
| |
|
| |
*offp = off; |
| |
*mp = m; |
| |
return (0); |
| |
} |
| |
|
| |
/* |
| |
* Search header for all Hop-by-hop options and process each option. |
| |
* This function is separate from ip6_hopopts_input() in order to |
| |
* handle a case where the sending node itself process its hop-by-hop |
| |
* options header. In such a case, the function is called from ip6_output(). |
| |
* |
| |
* The function assumes that hbh header is located right after the IPv6 header |
| |
* (RFC2460 p7), opthead is pointer into data content in m, and opthead to |
| |
* opthead + hbhlen is located in continuous memory region. |
| |
*/ |
| |
int |
| |
ip6_process_hopopts(struct mbuf *m, u_int8_t *opthead, int hbhlen, |
| |
u_int32_t *rtalertp, u_int32_t *plenp) |
| |
{ |
| |
struct ip6_hdr *ip6; |
| |
int optlen = 0; |
| |
u_int8_t *opt = opthead; |
| |
u_int16_t rtalert_val; |
| |
u_int32_t jumboplen; |
| |
const int erroff = sizeof(struct ip6_hdr) + sizeof(struct ip6_hbh); |
| |
|
| |
for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) { |
| |
switch (*opt) { |
| |
case IP6OPT_PAD1: |
| |
optlen = 1; |
| |
break; |
| |
case IP6OPT_PADN: |
| |
if (hbhlen < IP6OPT_MINLEN) { |
| |
ip6stat.ip6s_toosmall++; |
| |
goto bad; |
| |
} |
| |
optlen = *(opt + 1) + 2; |
| |
break; |
| |
case IP6OPT_RTALERT: |
| |
/* XXX may need check for alignment */ |
| |
if (hbhlen < IP6OPT_RTALERT_LEN) { |
| |
ip6stat.ip6s_toosmall++; |
| |
goto bad; |
| |
} |
| |
if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) { |
| |
/* XXX stat */ |
| |
icmp6_error(m, ICMP6_PARAM_PROB, |
| |
ICMP6_PARAMPROB_HEADER, |
| |
erroff + opt + 1 - opthead); |
| |
return (-1); |
| |
} |
| |
optlen = IP6OPT_RTALERT_LEN; |
| |
bcopy((void *)(opt + 2), (void *)&rtalert_val, 2); |
| |
*rtalertp = ntohs(rtalert_val); |
| |
break; |
| |
case IP6OPT_JUMBO: |
| |
/* XXX may need check for alignment */ |
| |
if (hbhlen < IP6OPT_JUMBO_LEN) { |
| |
ip6stat.ip6s_toosmall++; |
| |
goto bad; |
| |
} |
| |
if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) { |
| |
/* XXX stat */ |
| |
icmp6_error(m, ICMP6_PARAM_PROB, |
| |
ICMP6_PARAMPROB_HEADER, |
| |
erroff + opt + 1 - opthead); |
| |
return (-1); |
| |
} |
| |
optlen = IP6OPT_JUMBO_LEN; |
| |
|
| |
/* |
| |
* IPv6 packets that have non 0 payload length |
| |
* must not contain a jumbo payload option. |
| |
*/ |
| |
ip6 = mtod(m, struct ip6_hdr *); |
| |
if (ip6->ip6_plen) { |
| |
ip6stat.ip6s_badoptions++; |
| |
icmp6_error(m, ICMP6_PARAM_PROB, |
| |
ICMP6_PARAMPROB_HEADER, |
| |
erroff + opt - opthead); |
| |
return (-1); |
| |
} |
| |
|
| |
/* |
| |
* We may see jumbolen in unaligned location, so |
| |
* we'd need to perform bcopy(). |
| |
*/ |
| |
bcopy(opt + 2, &jumboplen, sizeof(jumboplen)); |
| |
jumboplen = (u_int32_t)htonl(jumboplen); |
| |
|
| |
#if 1 |
| |
/* |
| |
* if there are multiple jumbo payload options, |
| |
* *plenp will be non-zero and the packet will be |
| |
* rejected. |
| |
* the behavior may need some debate in ipngwg - |
| |
* multiple options does not make sense, however, |
| |
* there's no explicit mention in specification. |
| |
*/ |
| |
if (*plenp != 0) { |
| |
ip6stat.ip6s_badoptions++; |
| |
icmp6_error(m, ICMP6_PARAM_PROB, |
| |
ICMP6_PARAMPROB_HEADER, |
| |
erroff + opt + 2 - opthead); |
| |
return (-1); |
| |
} |
| |
#endif |
| |
|
| |
/* |
| |
* jumbo payload length must be larger than 65535. |
| |
*/ |
| |
if (jumboplen <= IPV6_MAXPACKET) { |
| |
ip6stat.ip6s_badoptions++; |
| |
icmp6_error(m, ICMP6_PARAM_PROB, |
| |
ICMP6_PARAMPROB_HEADER, |
| |
erroff + opt + 2 - opthead); |
| |
return (-1); |
| |
} |
| |
*plenp = jumboplen; |
| |
|
| |
break; |
| |
default: /* unknown option */ |
| |
if (hbhlen < IP6OPT_MINLEN) { |
| |
ip6stat.ip6s_toosmall++; |
| |
goto bad; |
| |
} |
| |
optlen = ip6_unknown_opt(opt, m, |
| |
erroff + opt - opthead); |
| |
if (optlen == -1) |
| |
return (-1); |
| |
optlen += 2; |
| |
break; |
| |
} |
| |
} |
| |
|
| |
return (0); |
| |
|
| |
bad: |
| |
m_freem(m); |
| |
return (-1); |
| |
} |
| |
|
| |
/* |
| |
* Unknown option processing. |
| |
* The third argument `off' is the offset from the IPv6 header to the option, |
| |
* which is necessary if the IPv6 header the and option header and IPv6 header |
| |
* is not continuous in order to return an ICMPv6 error. |
| |
*/ |
| |
int |
| |
ip6_unknown_opt(u_int8_t *optp, struct mbuf *m, int off) |
| |
{ |
| |
struct ip6_hdr *ip6; |
| |
|
| |
switch (IP6OPT_TYPE(*optp)) { |
| |
case IP6OPT_TYPE_SKIP: /* ignore the option */ |
| |
return ((int)*(optp + 1)); |
| |
case IP6OPT_TYPE_DISCARD: /* silently discard */ |
| |
m_freem(m); |
| |
return (-1); |
| |
case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */ |
| |
ip6stat.ip6s_badoptions++; |
| |
icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off); |
| |
return (-1); |
| |
case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */ |
| |
ip6stat.ip6s_badoptions++; |
| |
ip6 = mtod(m, struct ip6_hdr *); |
| |
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) || |
| |
(m->m_flags & (M_BCAST|M_MCAST))) |
| |
m_freem(m); |
| |
else |
| |
icmp6_error(m, ICMP6_PARAM_PROB, |
| |
ICMP6_PARAMPROB_OPTION, off); |
| |
return (-1); |
| |
} |
| |
|
| |
m_freem(m); /* XXX: NOTREACHED */ |
| |
return (-1); |
| |
} |
| |
|
| |
/* |
| |
* Create the "control" list for this pcb. |
| |
* |
| |
* The routine will be called from upper layer handlers like tcp6_input(). |
| |
* Thus the routine assumes that the caller (tcp6_input) have already |
| |
* called IP6_EXTHDR_CHECK() and all the extension headers are located in the |
| |
* very first mbuf on the mbuf chain. |
| |
* We may want to add some infinite loop prevention or sanity checks for safety. |
| |
* (This applies only when you are using KAME mbuf chain restriction, i.e. |
| |
* you are using IP6_EXTHDR_CHECK() not m_pulldown()) |
| |
*/ |
| |
void |
| |
ip6_savecontrol(struct in6pcb *in6p, struct mbuf **mp, |
| |
struct ip6_hdr *ip6, struct mbuf *m) |
| |
{ |
| |
#ifdef RFC2292 |
| |
#define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y)) |
| |
#else |
| |
#define IS2292(x, y) (y) |
| |
#endif |
| |
|
| |
#ifdef SO_TIMESTAMP |
| |
if (in6p->in6p_socket->so_options & SO_TIMESTAMP) { |
| |
struct timeval tv; |
| |
|
| |
microtime(&tv); |
| |
*mp = sbcreatecontrol((void *) &tv, sizeof(tv), |
| |
SCM_TIMESTAMP, SOL_SOCKET); |
| |
if (*mp) |
| |
mp = &(*mp)->m_next; |
| |
} |
| |
#endif |
| |
|
| |
/* some OSes call this logic with IPv4 packet, for SO_TIMESTAMP */ |
| |
if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) |
| |
return; |
| |
|
| |
/* RFC 2292 sec. 5 */ |
| |
if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) { |
| |
struct in6_pktinfo pi6; |
| |
|
| |
bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr)); |
| |
in6_clearscope(&pi6.ipi6_addr); /* XXX */ |
| |
pi6.ipi6_ifindex = m->m_pkthdr.rcvif ? |
| |
m->m_pkthdr.rcvif->if_index : 0; |
| |
*mp = sbcreatecontrol((void *) &pi6, |
| |
sizeof(struct in6_pktinfo), |
| |
IS2292(IPV6_2292PKTINFO, IPV6_PKTINFO), IPPROTO_IPV6); |
| |
if (*mp) |
| |
mp = &(*mp)->m_next; |
| |
} |
| |
|
| |
if (in6p->in6p_flags & IN6P_HOPLIMIT) { |
| |
int hlim = ip6->ip6_hlim & 0xff; |
| |
|
| |
*mp = sbcreatecontrol((void *) &hlim, sizeof(int), |
| |
IS2292(IPV6_2292HOPLIMIT, IPV6_HOPLIMIT), IPPROTO_IPV6); |
| |
if (*mp) |
| |
mp = &(*mp)->m_next; |
| |
} |
| |
|
| |
if ((in6p->in6p_flags & IN6P_TCLASS) != 0) { |
| |
u_int32_t flowinfo; |
| |
int tclass; |
| |
|
| |
flowinfo = (u_int32_t)ntohl(ip6->ip6_flow & IPV6_FLOWINFO_MASK); |
| |
flowinfo >>= 20; |
| |
|
| |
tclass = flowinfo & 0xff; |
| |
*mp = sbcreatecontrol((void *)&tclass, sizeof(tclass), |
| |
IPV6_TCLASS, IPPROTO_IPV6); |
| |
|
| |
if (*mp) |
| |
mp = &(*mp)->m_next; |
| |
} |
| |
|
| |
/* |
| |
* IPV6_HOPOPTS socket option. Recall that we required super-user |
| |
* privilege for the option (see ip6_ctloutput), but it might be too |
| |
* strict, since there might be some hop-by-hop options which can be |
| |
* returned to normal user. |
| |
* See also RFC3542 section 8 (or RFC2292 section 6). |
| |
*/ |
| |
if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0) { |
| |
/* |
| |
* Check if a hop-by-hop options header is contatined in the |
| |
* received packet, and if so, store the options as ancillary |
| |
* data. Note that a hop-by-hop options header must be |
| |
* just after the IPv6 header, which fact is assured through |
| |
* the IPv6 input processing. |
| |
*/ |
| |
struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *); |
| |
if (xip6->ip6_nxt == IPPROTO_HOPOPTS) { |
| |
struct ip6_hbh *hbh; |
| |
int hbhlen; |
| |
struct mbuf *ext; |
| |
|
| |
ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr), |
| |
xip6->ip6_nxt); |
| |
if (ext == NULL) { |
| |
ip6stat.ip6s_tooshort++; |
| |
return; |
| |
} |
| |
hbh = mtod(ext, struct ip6_hbh *); |
| |
hbhlen = (hbh->ip6h_len + 1) << 3; |
| |
if (hbhlen != ext->m_len) { |
| |
m_freem(ext); |
| |
ip6stat.ip6s_tooshort++; |
| |
return; |
| |
} |
| |
|
| |
/* |
| |
* XXX: We copy whole the header even if a jumbo |
| |
* payload option is included, which option is to |
| |
* be removed before returning in the RFC 2292. |
| |
* Note: this constraint is removed in RFC3542. |
| |
*/ |
| |
*mp = sbcreatecontrol((void *)hbh, hbhlen, |
| |
IS2292(IPV6_2292HOPOPTS, IPV6_HOPOPTS), |
| |
IPPROTO_IPV6); |
| |
if (*mp) |
| |
mp = &(*mp)->m_next; |
| |
m_freem(ext); |
| |
} |
| |
} |
| |
|
| |
/* IPV6_DSTOPTS and IPV6_RTHDR socket options */ |
| |
if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) { |
| |
struct ip6_hdr *xip6 = mtod(m, struct ip6_hdr *); |
| |
int nxt = xip6->ip6_nxt, off = sizeof(struct ip6_hdr); |
| |
|
| |
/* |
| |
* Search for destination options headers or routing |
| |
* header(s) through the header chain, and stores each |
| |
* header as ancillary data. |
| |
* Note that the order of the headers remains in |
| |
* the chain of ancillary data. |
| |
*/ |
| |
for (;;) { /* is explicit loop prevention necessary? */ |
| |
struct ip6_ext *ip6e = NULL; |
| |
int elen; |
| |
struct mbuf *ext = NULL; |
| |
|
| |
/* |
| |
* if it is not an extension header, don't try to |
| |
* pull it from the chain. |
| |
*/ |
| |
switch (nxt) { |
| |
case IPPROTO_DSTOPTS: |
| |
case IPPROTO_ROUTING: |
| |
case IPPROTO_HOPOPTS: |
| |
case IPPROTO_AH: /* is it possible? */ |
| |
break; |
| |
default: |
| |
goto loopend; |
| |
} |
| |
|
| |
ext = ip6_pullexthdr(m, off, nxt); |
| |
if (ext == NULL) { |
| |
ip6stat.ip6s_tooshort++; |
| |
return; |
| |
} |
| |
ip6e = mtod(ext, struct ip6_ext *); |
| |
if (nxt == IPPROTO_AH) |
| |
elen = (ip6e->ip6e_len + 2) << 2; |
| |
else |
| |
elen = (ip6e->ip6e_len + 1) << 3; |
| |
if (elen != ext->m_len) { |
| |
m_freem(ext); |
| |
ip6stat.ip6s_tooshort++; |
| |
return; |
| |
} |
| |
KASSERT(IP6_HDR_ALIGNED_P(ip6e)); |
| |
|
| |
switch (nxt) { |
| |
case IPPROTO_DSTOPTS: |
| |
if (!in6p->in6p_flags & IN6P_DSTOPTS) |
| |
break; |
| |
|
| |
*mp = sbcreatecontrol((void *)ip6e, elen, |
| |
IS2292(IPV6_2292DSTOPTS, IPV6_DSTOPTS), |
| |
IPPROTO_IPV6); |
| |
if (*mp) |
| |
mp = &(*mp)->m_next; |
| |
break; |
| |
|
| |
case IPPROTO_ROUTING: |
| |
if (!in6p->in6p_flags & IN6P_RTHDR) |
| |
break; |
| |
|
| |
*mp = sbcreatecontrol((void *)ip6e, elen, |
| |
IS2292(IPV6_2292RTHDR, IPV6_RTHDR), |
| |
IPPROTO_IPV6); |
| |
if (*mp) |
| |
mp = &(*mp)->m_next; |
| |
break; |
| |
|
| |
case IPPROTO_HOPOPTS: |
| |
case IPPROTO_AH: /* is it possible? */ |
| |
break; |
| |
|
| |
default: |
| |
/* |
| |
* other cases have been filtered in the above. |
| |
* none will visit this case. here we supply |
| |
* the code just in case (nxt overwritten or |
| |
* other cases). |
| |
*/ |
| |
m_freem(ext); |
| |
goto loopend; |
| |
|
| |
} |
| |
|
| |
/* proceed with the next header. */ |
| |
off += elen; |
| |
nxt = ip6e->ip6e_nxt; |
| |
ip6e = NULL; |
| |
m_freem(ext); |
| |
ext = NULL; |
| |
} |
| |
loopend: |
| |
; |
| |
} |
| |
} |
| |
#undef IS2292 |
| |
|
| |
|
| |
void |
| |
ip6_notify_pmtu(struct in6pcb *in6p, const struct sockaddr_in6 *dst, |
| |
uint32_t *mtu) |
| |
{ |
| |
struct socket *so; |
| |
struct mbuf *m_mtu; |
| |
struct ip6_mtuinfo mtuctl; |
| |
|
| |
so = in6p->in6p_socket; |
| |
|
| |
if (mtu == NULL) |
| |
return; |
| |
|
| |
#ifdef DIAGNOSTIC |
| |
if (so == NULL) /* I believe this is impossible */ |
| |
panic("ip6_notify_pmtu: socket is NULL"); |
| |
#endif |
| |
|
| |
memset(&mtuctl, 0, sizeof(mtuctl)); /* zero-clear for safety */ |
| |
mtuctl.ip6m_mtu = *mtu; |
| |
mtuctl.ip6m_addr = *dst; |
| |
if (sa6_recoverscope(&mtuctl.ip6m_addr)) |
| |
return; |
| |
|
| |
if ((m_mtu = sbcreatecontrol((void *)&mtuctl, sizeof(mtuctl), |
| |
IPV6_PATHMTU, IPPROTO_IPV6)) == NULL) |
| |
return; |
| |
|
| |
if (sbappendaddr(&so->so_rcv, (const struct sockaddr *)dst, NULL, m_mtu) |
| |
== 0) { |
| |
m_freem(m_mtu); |
| |
/* XXX: should count statistics */ |
| |
} else |
| |
sorwakeup(so); |
| |
|
| |
return; |
| |
} |
| |
|
| |
/* |
| |
* pull single extension header from mbuf chain. returns single mbuf that |
| |
* contains the result, or NULL on error. |
| |
*/ |
| |
static struct mbuf * |
| |
ip6_pullexthdr(struct mbuf *m, size_t off, int nxt) |
| |
{ |
| |
struct ip6_ext ip6e; |
| |
size_t elen; |
| |
struct mbuf *n; |
| |
|
| |
#ifdef DIAGNOSTIC |
| |
switch (nxt) { |
| |
case IPPROTO_DSTOPTS: |
| |
case IPPROTO_ROUTING: |
| |
case IPPROTO_HOPOPTS: |
| |
case IPPROTO_AH: /* is it possible? */ |
| |
break; |
| |
default: |
| |
printf("ip6_pullexthdr: invalid nxt=%d\n", nxt); |
| |
} |
| |
#endif |
| |
|
| |
m_copydata(m, off, sizeof(ip6e), (void *)&ip6e); |
| |
if (nxt == IPPROTO_AH) |
| |
elen = (ip6e.ip6e_len + 2) << 2; |
| |
else |
| |
elen = (ip6e.ip6e_len + 1) << 3; |
| |
|
| |
MGET(n, M_DONTWAIT, MT_DATA); |
| |
if (n && elen >= MLEN) { |
| |
MCLGET(n, M_DONTWAIT); |
| |
if ((n->m_flags & M_EXT) == 0) { |
| |
m_free(n); |
| |
n = NULL; |
| |
} |
| |
} |
| |
if (!n) |
| |
return NULL; |
| |
|
| |
n->m_len = 0; |
| |
if (elen >= M_TRAILINGSPACE(n)) { |
| |
m_free(n); |
| |
return NULL; |
| |
} |
| |
|
| |
m_copydata(m, off, elen, mtod(n, void *)); |
| |
n->m_len = elen; |
| |
return n; |
| |
} |
| |
|
| |
/* |
| |
* Get pointer to the previous header followed by the header |
| |
* currently processed. |
| |
* XXX: This function supposes that |
| |
* M includes all headers, |
| |
* the next header field and the header length field of each header |
| |
* are valid, and |
| |
* the sum of each header length equals to OFF. |
| |
* Because of these assumptions, this function must be called very |
| |
* carefully. Moreover, it will not be used in the near future when |
| |
* we develop `neater' mechanism to process extension headers. |
| |
*/ |
| |
u_int8_t * |
| |
ip6_get_prevhdr(struct mbuf *m, int off) |
| |
{ |
| |
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); |
| |
|
| |
if (off == sizeof(struct ip6_hdr)) |
| |
return (&ip6->ip6_nxt); |
| |
else { |
| |
int len, nxt; |
| |
struct ip6_ext *ip6e = NULL; |
| |
|
| |
nxt = ip6->ip6_nxt; |
| |
len = sizeof(struct ip6_hdr); |
| |
while (len < off) { |
| |
ip6e = (struct ip6_ext *)(mtod(m, char *) + len); |
| |
|
| |
switch (nxt) { |
| |
case IPPROTO_FRAGMENT: |
| |
len += sizeof(struct ip6_frag); |
| |
break; |
| |
case IPPROTO_AH: |
| |
len += (ip6e->ip6e_len + 2) << 2; |
| |
break; |
| |
default: |
| |
len += (ip6e->ip6e_len + 1) << 3; |
| |
break; |
| |
} |
| |
nxt = ip6e->ip6e_nxt; |
| |
} |
| |
if (ip6e) |
| |
return (&ip6e->ip6e_nxt); |
| |
else |
| |
return NULL; |
| |
} |
| |
} |
| |
|
| |
/* |
| |
* get next header offset. m will be retained. |
| |
*/ |
| |
int |
| |
ip6_nexthdr(struct mbuf *m, int off, int proto, int *nxtp) |
| |
{ |
| |
struct ip6_hdr ip6; |
| |
struct ip6_ext ip6e; |
| |
struct ip6_frag fh; |
| |
|
| |
/* just in case */ |
| |
if (m == NULL) |
| |
panic("ip6_nexthdr: m == NULL"); |
| |
if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len < off) |
| |
return -1; |
| |
|
| |
switch (proto) { |
| |
case IPPROTO_IPV6: |
| |
/* do not chase beyond intermediate IPv6 headers */ |
| |
if (off != 0) |
| |
return -1; |
| |
if (m->m_pkthdr.len < off + sizeof(ip6)) |
| |
return -1; |
| |
m_copydata(m, off, sizeof(ip6), (void *)&ip6); |
| |
if (nxtp) |
| |
*nxtp = ip6.ip6_nxt; |
| |
off += sizeof(ip6); |
| |
return off; |
| |
|
| |
case IPPROTO_FRAGMENT: |
| |
/* |
| |
* terminate parsing if it is not the first fragment, |
| |
* it does not make sense to parse through it. |
| |
*/ |
| |
if (m->m_pkthdr.len < off + sizeof(fh)) |
| |
return -1; |
| |
m_copydata(m, off, sizeof(fh), (void *)&fh); |
| |
if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0) |
| |
return -1; |
| |
if (nxtp) |
| |
*nxtp = fh.ip6f_nxt; |
| |
off += sizeof(struct ip6_frag); |
| |
return off; |
| |
|
| |
case IPPROTO_AH: |
| |
if (m->m_pkthdr.len < off + sizeof(ip6e)) |
| |
return -1; |
| |
m_copydata(m, off, sizeof(ip6e), (void *)&ip6e); |
| |
if (nxtp) |
| |
*nxtp = ip6e.ip6e_nxt; |
| |
off += (ip6e.ip6e_len + 2) << 2; |
| |
if (m->m_pkthdr.len < off) |
| |
return -1; |
| |
return off; |
| |
|
| |
case IPPROTO_HOPOPTS: |
| |
case IPPROTO_ROUTING: |
| |
case IPPROTO_DSTOPTS: |
| |
if (m->m_pkthdr.len < off + sizeof(ip6e)) |
| |
return -1; |
| |
m_copydata(m, off, sizeof(ip6e), (void *)&ip6e); |
| |
if (nxtp) |
| |
*nxtp = ip6e.ip6e_nxt; |
| |
off += (ip6e.ip6e_len + 1) << 3; |
| |
if (m->m_pkthdr.len < off) |
| |
return -1; |
| |
return off; |
| |
|
| |
case IPPROTO_NONE: |
| |
case IPPROTO_ESP: |
| |
case IPPROTO_IPCOMP: |
| |
/* give up */ |
| |
return -1; |
| |
|
| |
default: |
| |
return -1; |
| |
} |
| |
} |
| |
|
| |
/* |
| |
* get offset for the last header in the chain. m will be kept untainted. |
| |
*/ |
| |
int |
| |
ip6_lasthdr(struct mbuf *m, int off, int proto, int *nxtp) |
| |
{ |
| |
int newoff; |
| |
int nxt; |
| |
|
| |
if (!nxtp) { |
| |
nxt = -1; |
| |
nxtp = &nxt; |
| |
} |
| |
for (;;) { |
| |
newoff = ip6_nexthdr(m, off, proto, nxtp); |
| |
if (newoff < 0) |
| |
return off; |
| |
else if (newoff < off) |
| |
return -1; /* invalid */ |
| |
else if (newoff == off) |
| |
return newoff; |
| |
|
| |
off = newoff; |
| |
proto = *nxtp; |
| |
} |
| |
} |
| |
|
| |
struct m_tag * |
| |
ip6_addaux(struct mbuf *m) |
| |
{ |
| |
struct m_tag *mtag; |
| |
|
| |
mtag = m_tag_find(m, PACKET_TAG_INET6, NULL); |
| |
if (!mtag) { |
| |
mtag = m_tag_get(PACKET_TAG_INET6, sizeof(struct ip6aux), |
| |
M_NOWAIT); |
| |
if (mtag) { |
| |
m_tag_prepend(m, mtag); |
| |
bzero(mtag + 1, sizeof(struct ip6aux)); |
| |
} |
| |
} |
| |
return mtag; |
| |
} |
| |
|
| |
struct m_tag * |
| |
ip6_findaux(struct mbuf *m) |
| |
{ |
| |
struct m_tag *mtag; |
| |
|
| |
mtag = m_tag_find(m, PACKET_TAG_INET6, NULL); |
| |
return mtag; |
| |
} |
| |
|
| |
void |
| |
ip6_delaux(struct mbuf *m) |
| |
{ |
| |
struct m_tag *mtag; |
| |
|
| |
mtag = m_tag_find(m, PACKET_TAG_INET6, NULL); |
| |
if (mtag) |
| |
m_tag_delete(m, mtag); |
| |
} |
| |
|
| |
#ifdef GATEWAY |
| |
/* |
| |
* sysctl helper routine for net.inet.ip6.maxflows. Since |
| |
* we could reduce this value, call ip6flow_reap(); |
| |
*/ |
| |
static int |
| |
sysctl_net_inet6_ip6_maxflows(SYSCTLFN_ARGS) |
| |
{ |
| |
int s; |
| |
|
| |
s = sysctl_lookup(SYSCTLFN_CALL(rnode)); |
| |
if (s || newp == NULL) |
| |
return (s); |
| |
|
| |
s = splsoftnet(); |
| |
ip6flow_reap(0); |
| |
splx(s); |
| |
|
| |
return (0); |
| |
} |
| |
|
| |
static int |
| |
sysctl_net_inet6_ip6_hashsize(SYSCTLFN_ARGS) |
| |
{ |
| |
int error, tmp; |
| |
struct sysctlnode node; |
| |
|
| |
node = *rnode; |
| |
tmp = ip6_hashsize; |
| |
node.sysctl_data = &tmp; |
| |
error = sysctl_lookup(SYSCTLFN_CALL(&node)); |
| |
if (error || newp == NULL) |
| |
return (error); |
| |
|
| |
if ((tmp & (tmp - 1)) == 0 && tmp != 0) { |
| |
/* |
| |
* Can only fail due to malloc() |
| |
*/ |
| |
if (ip6flow_invalidate_all(tmp)) |
| |
return ENOMEM; |
| |
} else { |
| |
/* |
| |
* EINVAL if not a power of 2 |
| |
*/ |
| |
return EINVAL; |
| |
} |
| |
|
| |
return (0); |
| |
} |
| |
#endif /* GATEWAY */ |
| |
|
| |
/* |
| |
* System control for IP6 |
| |
*/ |
| |
|
| |
u_char inet6ctlerrmap[PRC_NCMDS] = { |
| |
0, 0, 0, 0, |
| |
0, EMSGSIZE, EHOSTDOWN, EHOSTUNREACH, |
| |
EHOSTUNREACH, EHOSTUNREACH, ECONNREFUSED, ECONNREFUSED, |
| |
EMSGSIZE, EHOSTUNREACH, 0, 0, |
| |
0, 0, 0, 0, |
| |
ENOPROTOOPT |
| |
}; |
| |
|
| |
SYSCTL_SETUP(sysctl_net_inet6_ip6_setup, "sysctl net.inet6.ip6 subtree setup") |
| |
{ |
| |
#ifdef RFC2292 |
| |
#define IS2292(x, y) ((in6p->in6p_flags & IN6P_RFC2292) ? (x) : (y)) |
| |
#else |
| |
#define IS2292(x, y) (y) |
| |
#endif |
| |
|
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT, |
| |
CTLTYPE_NODE, "net", NULL, |
| |
NULL, 0, NULL, 0, |
| |
CTL_NET, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT, |
| |
CTLTYPE_NODE, "inet6", |
| |
SYSCTL_DESCR("PF_INET6 related settings"), |
| |
NULL, 0, NULL, 0, |
| |
CTL_NET, PF_INET6, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT, |
| |
CTLTYPE_NODE, "ip6", |
| |
SYSCTL_DESCR("IPv6 related settings"), |
| |
NULL, 0, NULL, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, CTL_EOL); |
| |
|
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "forwarding", |
| |
SYSCTL_DESCR("Enable forwarding of INET6 datagrams"), |
| |
NULL, 0, &ip6_forwarding, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_FORWARDING, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "redirect", |
| |
SYSCTL_DESCR("Enable sending of ICMPv6 redirect messages"), |
| |
NULL, 0, &ip6_sendredirects, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_SENDREDIRECTS, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "hlim", |
| |
SYSCTL_DESCR("Hop limit for an INET6 datagram"), |
| |
NULL, 0, &ip6_defhlim, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_DEFHLIM, CTL_EOL); |
| |
#ifdef notyet |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "mtu", NULL, |
| |
NULL, 0, &, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_DEFMTU, CTL_EOL); |
| |
#endif |
| |
#ifdef __no_idea__ |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "forwsrcrt", NULL, |
| |
NULL, 0, &?, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_FORWSRCRT, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_STRUCT, "mrtstats", NULL, |
| |
NULL, 0, &?, sizeof(?), |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_MRTSTATS, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_?, "mrtproto", NULL, |
| |
NULL, 0, &?, sizeof(?), |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_MRTPROTO, CTL_EOL); |
| |
#endif |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "maxfragpackets", |
| |
SYSCTL_DESCR("Maximum number of fragments to buffer " |
| |
"for reassembly"), |
| |
NULL, 0, &ip6_maxfragpackets, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_MAXFRAGPACKETS, CTL_EOL); |
| |
#ifdef __no_idea__ |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "sourcecheck", NULL, |
| |
NULL, 0, &?, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_SOURCECHECK, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "sourcecheck_logint", NULL, |
| |
NULL, 0, &?, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_SOURCECHECK_LOGINT, CTL_EOL); |
| |
#endif |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "accept_rtadv", |
| |
SYSCTL_DESCR("Accept router advertisements"), |
| |
NULL, 0, &ip6_accept_rtadv, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_ACCEPT_RTADV, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "keepfaith", |
| |
SYSCTL_DESCR("Activate faith interface"), |
| |
NULL, 0, &ip6_keepfaith, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_KEEPFAITH, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "log_interval", |
| |
SYSCTL_DESCR("Minumum interval between logging " |
| |
"unroutable packets"), |
| |
NULL, 0, &ip6_log_interval, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_LOG_INTERVAL, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "hdrnestlimit", |
| |
SYSCTL_DESCR("Maximum number of nested IPv6 headers"), |
| |
NULL, 0, &ip6_hdrnestlimit, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_HDRNESTLIMIT, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "dad_count", |
| |
SYSCTL_DESCR("Number of Duplicate Address Detection " |
| |
"probes to send"), |
| |
NULL, 0, &ip6_dad_count, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_DAD_COUNT, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "auto_flowlabel", |
| |
SYSCTL_DESCR("Assign random IPv6 flow labels"), |
| |
NULL, 0, &ip6_auto_flowlabel, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_AUTO_FLOWLABEL, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "defmcasthlim", |
| |
SYSCTL_DESCR("Default multicast hop limit"), |
| |
NULL, 0, &ip6_defmcasthlim, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_DEFMCASTHLIM, CTL_EOL); |
| |
#if NGIF > 0 |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "gifhlim", |
| |
SYSCTL_DESCR("Default hop limit for a gif tunnel datagram"), |
| |
NULL, 0, &ip6_gif_hlim, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_GIF_HLIM, CTL_EOL); |
| |
#endif /* NGIF */ |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT, |
| |
CTLTYPE_STRING, "kame_version", |
| |
SYSCTL_DESCR("KAME Version"), |
| |
NULL, 0, __UNCONST(__KAME_VERSION), 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_KAME_VERSION, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "use_deprecated", |
| |
SYSCTL_DESCR("Allow use of deprecated addresses as " |
| |
"source addresses"), |
| |
NULL, 0, &ip6_use_deprecated, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_USE_DEPRECATED, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "rr_prune", NULL, |
| |
NULL, 0, &ip6_rr_prune, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_RR_PRUNE, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT |
| |
#ifndef INET6_BINDV6ONLY |
| |
|CTLFLAG_READWRITE, |
| |
#endif |
| |
CTLTYPE_INT, "v6only", |
| |
SYSCTL_DESCR("Disallow PF_INET6 sockets from connecting " |
| |
"to PF_INET sockets"), |
| |
NULL, 0, &ip6_v6only, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_V6ONLY, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "anonportmin", |
| |
SYSCTL_DESCR("Lowest ephemeral port number to assign"), |
| |
sysctl_net_inet_ip_ports, 0, &ip6_anonportmin, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_ANONPORTMIN, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "anonportmax", |
| |
SYSCTL_DESCR("Highest ephemeral port number to assign"), |
| |
sysctl_net_inet_ip_ports, 0, &ip6_anonportmax, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_ANONPORTMAX, CTL_EOL); |
| |
#ifndef IPNOPRIVPORTS |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "lowportmin", |
| |
SYSCTL_DESCR("Lowest privileged ephemeral port number " |
| |
"to assign"), |
| |
sysctl_net_inet_ip_ports, 0, &ip6_lowportmin, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_LOWPORTMIN, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "lowportmax", |
| |
SYSCTL_DESCR("Highest privileged ephemeral port number " |
| |
"to assign"), |
| |
sysctl_net_inet_ip_ports, 0, &ip6_lowportmax, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_LOWPORTMAX, CTL_EOL); |
| |
#endif /* IPNOPRIVPORTS */ |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "use_tempaddr", |
| |
SYSCTL_DESCR("Use temporary address"), |
| |
NULL, 0, &ip6_use_tempaddr, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
CTL_CREATE, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "temppltime", |
| |
SYSCTL_DESCR("preferred lifetime of a temporary address"), |
| |
NULL, 0, &ip6_temp_preferred_lifetime, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
CTL_CREATE, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "tempvltime", |
| |
SYSCTL_DESCR("valid lifetime of a temporary address"), |
| |
NULL, 0, &ip6_temp_valid_lifetime, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
CTL_CREATE, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "maxfrags", |
| |
SYSCTL_DESCR("Maximum fragments in reassembly queue"), |
| |
NULL, 0, &ip6_maxfrags, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_MAXFRAGS, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT, |
| |
CTLTYPE_STRUCT, "stats", |
| |
SYSCTL_DESCR("IPv6 statistics"), |
| |
NULL, 0, &ip6stat, sizeof(ip6stat), |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_STATS, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "use_defaultzone", |
| |
SYSCTL_DESCR("Whether to use the default scope zones"), |
| |
NULL, 0, &ip6_use_defzone, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
IPV6CTL_USE_DEFAULTZONE, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "mcast_pmtu", |
| |
SYSCTL_DESCR("Enable pMTU discovery for multicast packet"), |
| |
NULL, 0, &ip6_mcast_pmtu, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
CTL_CREATE, CTL_EOL); |
| |
#ifdef GATEWAY |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "maxflows", |
| |
SYSCTL_DESCR("Number of flows for fast forwarding (IPv6)"), |
| |
sysctl_net_inet6_ip6_maxflows, 0, &ip6_maxflows, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
CTL_CREATE, CTL_EOL); |
| |
sysctl_createv(clog, 0, NULL, NULL, |
| |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
| |
CTLTYPE_INT, "hashsize", |
| |
SYSCTL_DESCR("Size of hash table for fast forwarding (IPv6)"), |
| |
sysctl_net_inet6_ip6_hashsize, 0, &ip6_hashsize, 0, |
| |
CTL_NET, PF_INET6, IPPROTO_IPV6, |
| |
CTL_CREATE, CTL_EOL); |
| |
#endif |
| |
} |
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