version 1.6, 1999/07/31 18:41:16 |
version 1.52.2.3, 2002/07/15 10:37:05 |
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/* $NetBSD$ */ |
/* $NetBSD$ */ |
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/* $KAME: ip6_input.c,v 1.188 2001/03/29 05:34:31 itojun Exp $ */ |
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/* |
/* |
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
* All rights reserved. |
* All rights reserved. |
* |
* |
* Redistribution and use in source and binary forms, with or without |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* modification, are permitted provided that the following conditions |
* are met: |
* are met: |
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* 3. Neither the name of the project nor the names of its contributors |
* 3. Neither the name of the project nor the names of its contributors |
* may be used to endorse or promote products derived from this software |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* without specific prior written permission. |
* |
* |
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* @(#)ip_input.c 8.2 (Berkeley) 1/4/94 |
* @(#)ip_input.c 8.2 (Berkeley) 1/4/94 |
*/ |
*/ |
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#ifdef __FreeBSD__ |
#include <sys/cdefs.h> |
#include "opt_ip6fw.h" |
__KERNEL_RCSID(0, "$NetBSD$"); |
#endif |
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#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__) |
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#include "opt_inet.h" |
#include "opt_inet.h" |
#ifdef __NetBSD__ /*XXX*/ |
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#include "opt_ipsec.h" |
#include "opt_ipsec.h" |
#endif |
#include "opt_pfil_hooks.h" |
#endif |
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#include <sys/param.h> |
#include <sys/param.h> |
#include <sys/systm.h> |
#include <sys/systm.h> |
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#include <sys/time.h> |
#include <sys/time.h> |
#include <sys/kernel.h> |
#include <sys/kernel.h> |
#include <sys/syslog.h> |
#include <sys/syslog.h> |
#ifdef __NetBSD__ |
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#include <sys/proc.h> |
#include <sys/proc.h> |
#endif |
#include <sys/sysctl.h> |
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#include <net/if.h> |
#include <net/if.h> |
#include <net/if_types.h> |
#include <net/if_types.h> |
#include <net/if_dl.h> |
#include <net/if_dl.h> |
#include <net/route.h> |
#include <net/route.h> |
#include <net/netisr.h> |
#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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#include <netinet/in.h> |
#include <netinet/in.h> |
#include <netinet6/in6_var.h> |
|
#include <netinet/in_systm.h> |
#include <netinet/in_systm.h> |
#include <netinet6/ip6.h> |
#ifdef INET |
#if !defined(__FreeBSD__) || __FreeBSD__ < 3 |
#include <netinet/ip.h> |
#include <netinet6/in6_pcb.h> |
#include <netinet/ip_icmp.h> |
#else |
#endif /* INET */ |
#include <netinet/in_pcb.h> |
#include <netinet/ip6.h> |
#endif |
#include <netinet6/in6_var.h> |
#include <netinet6/ip6_var.h> |
#include <netinet6/ip6_var.h> |
#include <netinet6/icmp6.h> |
#include <netinet6/in6_pcb.h> |
|
#include <netinet/icmp6.h> |
#include <netinet6/in6_ifattach.h> |
#include <netinet6/in6_ifattach.h> |
#include <netinet6/nd6.h> |
#include <netinet6/nd6.h> |
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#ifdef INET |
#ifdef IPSEC |
#include <netinet/ip.h> |
#include <netinet6/ipsec.h> |
#include <netinet/ip_icmp.h> |
#endif |
#endif /*INET*/ |
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#include <netinet6/ip6protosw.h> |
#include <netinet6/ip6protosw.h> |
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/* we need it for NLOOP. */ |
/* we need it for NLOOP. */ |
#include "loop.h" |
#include "loop.h" |
#include "faith.h" |
#include "faith.h" |
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#include "gif.h" |
#include "gif.h" |
#include "bpfilter.h" |
#include "bpfilter.h" |
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extern struct domain inet6domain; |
#if NGIF > 0 |
extern struct ip6protosw inet6sw[]; |
#include <netinet6/in6_gif.h> |
#ifdef __bsdi__ |
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extern struct ifnet loif; |
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#endif |
#endif |
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#include <net/net_osdep.h> |
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extern struct domain inet6domain; |
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u_char ip6_protox[IPPROTO_MAX]; |
u_char ip6_protox[IPPROTO_MAX]; |
static int ip6qmaxlen = IFQ_MAXLEN; |
static int ip6qmaxlen = IFQ_MAXLEN; |
struct in6_ifaddr *in6_ifaddr; |
struct in6_ifaddr *in6_ifaddr; |
struct ifqueue ip6intrq; |
struct ifqueue ip6intrq; |
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#ifdef __NetBSD__ |
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extern struct ifnet loif[NLOOP]; |
extern struct ifnet loif[NLOOP]; |
int ip6_forward_srcrt; /* XXX */ |
int ip6_forward_srcrt; /* XXX */ |
int ip6_sourcecheck; /* XXX */ |
int ip6_sourcecheck; /* XXX */ |
int ip6_sourcecheck_interval; /* XXX */ |
int ip6_sourcecheck_interval; /* XXX */ |
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#ifdef PFIL_HOOKS |
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struct pfil_head inet6_pfil_hook; |
#endif |
#endif |
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struct ip6stat ip6stat; |
struct ip6stat ip6stat; |
Line 155 static int ip6_hopopts_input __P((u_int3 |
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Line 157 static int ip6_hopopts_input __P((u_int3 |
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void |
void |
ip6_init() |
ip6_init() |
{ |
{ |
register struct ip6protosw *pr; |
struct ip6protosw *pr; |
register int i; |
int i; |
struct timeval tv; |
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pr = (struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW); |
pr = (struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW); |
if (pr == 0) |
if (pr == 0) |
|
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ip6intrq.ifq_maxlen = ip6qmaxlen; |
ip6intrq.ifq_maxlen = ip6qmaxlen; |
nd6_init(); |
nd6_init(); |
frag6_init(); |
frag6_init(); |
/* |
ip6_flow_seq = arc4random(); |
* in many cases, random() here does NOT return random number |
|
* as initialization during bootstrap time occur in fixed order. |
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*/ |
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microtime(&tv); |
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ip6_flow_seq = random() ^ tv.tv_usec; |
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in6_iflladdr = malloc(i, M_IFADDR, M_WAITOK); |
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bzero(in6_iflladdr, i); |
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ip6_init2((void *)0); |
ip6_init2((void *)0); |
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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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static void |
static void |
ip6_init2(dummy) |
ip6_init2(dummy) |
void *dummy; |
void *dummy; |
{ |
{ |
int i; |
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/* |
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* to route local address of p2p link to loopback, |
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* assign loopback address first. |
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*/ |
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for (i = 0; i < NLOOP; i++) |
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in6_ifattach(&loif[i], IN6_IFT_LOOP, NULL, 0); |
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/* get EUI64 from somewhere, attach pseudo interfaces */ |
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if (in6_ifattach_getifid(NULL) == 0) |
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in6_ifattach_p2p(); |
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/* nd6_timer_init */ |
/* nd6_timer_init */ |
timeout(nd6_timer, (caddr_t)0, hz); |
callout_init(&nd6_timer_ch); |
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callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL); |
} |
} |
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#ifdef __FreeBSD__ |
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/* cheat */ |
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SYSINIT(netinet6init2, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, ip6_init2, NULL); |
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#endif |
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/* |
/* |
* IP6 input interrupt handling. Just pass the packet to ip6_input. |
* IP6 input interrupt handling. Just pass the packet to ip6_input. |
*/ |
*/ |
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struct mbuf *m; |
struct mbuf *m; |
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for (;;) { |
for (;;) { |
s = splimp(); |
s = splnet(); |
IF_DEQUEUE(&ip6intrq, m); |
IF_DEQUEUE(&ip6intrq, m); |
splx(s); |
splx(s); |
if (m == 0) |
if (m == 0) |
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} |
} |
} |
} |
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#ifdef __FreeBSD__ |
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NETISR_SET(NETISR_IPV6, ip6intr); |
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#endif |
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extern struct route_in6 ip6_forward_rt; |
extern struct route_in6 ip6_forward_rt; |
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void |
void |
ip6_input(m) |
ip6_input(m) |
struct mbuf *m; |
struct mbuf *m; |
{ |
{ |
register struct ip6_hdr *ip6; |
struct ip6_hdr *ip6; |
int off = sizeof(struct ip6_hdr), nest; |
int off = sizeof(struct ip6_hdr), nest; |
u_int32_t plen; |
u_int32_t plen; |
u_int32_t rtalert = ~0; |
u_int32_t rtalert = ~0; |
int nxt, ours = 0; |
int nxt, ours = 0; |
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struct ifnet *deliverifp = NULL; |
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#ifdef IPSEC |
#ifdef IPSEC |
/* |
/* |
* should the inner packet be considered authentic? |
* should the inner packet be considered authentic? |
* see comment in ah4_input(). |
* see comment in ah4_input(). |
*/ |
*/ |
if (m) { |
m->m_flags &= ~M_AUTHIPHDR; |
m->m_flags &= ~M_AUTHIPHDR; |
m->m_flags &= ~M_AUTHIPDGM; |
m->m_flags &= ~M_AUTHIPDGM; |
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} |
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#endif |
#endif |
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/* |
/* |
* mbuf statistics by kazu |
* mbuf statistics |
*/ |
*/ |
if (m->m_flags & M_EXT) { |
if (m->m_flags & M_EXT) { |
if (m->m_next) |
if (m->m_next) |
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else |
else |
ip6stat.ip6s_mext1++; |
ip6stat.ip6s_mext1++; |
} else { |
} else { |
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#define M2MMAX (sizeof(ip6stat.ip6s_m2m)/sizeof(ip6stat.ip6s_m2m[0])) |
if (m->m_next) { |
if (m->m_next) { |
if (m->m_flags & M_LOOP) |
if (m->m_flags & M_LOOP) { |
ip6stat.ip6s_m2m[loif[0].if_index]++; /*XXX*/ |
ip6stat.ip6s_m2m[loif[0].if_index]++; /* XXX */ |
else if (m->m_pkthdr.rcvif->if_index <= 31) |
} else if (m->m_pkthdr.rcvif->if_index < M2MMAX) |
ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++; |
ip6stat.ip6s_m2m[m->m_pkthdr.rcvif->if_index]++; |
else |
else |
ip6stat.ip6s_m2m[0]++; |
ip6stat.ip6s_m2m[0]++; |
} else |
} else |
ip6stat.ip6s_m1++; |
ip6stat.ip6s_m1++; |
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#undef M2MMAX |
} |
} |
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IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), /*nothing*/); |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive); |
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ip6stat.ip6s_total++; |
ip6stat.ip6s_total++; |
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if (m->m_len < sizeof(struct ip6_hdr) && |
#ifndef PULLDOWN_TEST |
(m = m_pullup(m, sizeof(struct ip6_hdr))) == 0) { |
/* XXX is the line really necessary? */ |
ip6stat.ip6s_toosmall++; |
IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), /*nothing*/); |
return; |
#endif |
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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, caddr_t)) == 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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ip6 = mtod(m, struct ip6_hdr *); |
ip6 = mtod(m, struct ip6_hdr *); |
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if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { |
if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { |
ip6stat.ip6s_badvers++; |
ip6stat.ip6s_badvers++; |
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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr); |
goto bad; |
goto bad; |
} |
} |
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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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#else |
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if (1) |
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#endif |
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{ |
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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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} |
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#endif /* PFIL_HOOKS */ |
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ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; |
ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; |
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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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/* |
/* |
* Scope check |
* Check against address spoofing/corruption. |
*/ |
*/ |
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) || |
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src) || |
IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_dst)) { |
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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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 |
|
* 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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* |
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* This check chokes if we are in an SIIT cloud. As none of BSDs |
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* 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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if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
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IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { |
ip6stat.ip6s_badscope++; |
ip6stat.ip6s_badscope++; |
|
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
goto bad; |
goto bad; |
} |
} |
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#if 0 |
|
/* |
|
* Reject packets with IPv4 compatible addresses (auto tunnel). |
|
* |
|
* The code forbids auto tunnel relay case in RFC1933 (the check is |
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* stronger than RFC1933). We may want to re-enable it if mech-xx |
|
* is revised to forbid relaying case. |
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*/ |
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if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) || |
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IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) { |
|
ip6stat.ip6s_badscope++; |
|
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
|
goto bad; |
|
} |
|
#endif |
|
|
if (IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src) || |
if (IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src) || |
IN6_IS_ADDR_LOOPBACK(&ip6->ip6_dst)) { |
IN6_IS_ADDR_LOOPBACK(&ip6->ip6_dst)) { |
if (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) { |
if (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) { |
ours = 1; |
ours = 1; |
|
deliverifp = m->m_pkthdr.rcvif; |
goto hbhcheck; |
goto hbhcheck; |
} else { |
} else { |
ip6stat.ip6s_badscope++; |
ip6stat.ip6s_badscope++; |
|
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
goto bad; |
goto bad; |
} |
} |
} |
} |
|
|
if (m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) { |
/* drop packets if interface ID portion is already filled */ |
if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) { |
if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) { |
ours = 1; |
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src) && |
goto hbhcheck; |
ip6->ip6_src.s6_addr16[1]) { |
|
ip6stat.ip6s_badscope++; |
|
goto bad; |
} |
} |
} else { |
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst) && |
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src)) |
ip6->ip6_dst.s6_addr16[1]) { |
ip6->ip6_src.s6_addr16[1] |
ip6stat.ip6s_badscope++; |
= htons(m->m_pkthdr.rcvif->if_index); |
goto bad; |
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) |
} |
ip6->ip6_dst.s6_addr16[1] |
} |
= htons(m->m_pkthdr.rcvif->if_index); |
|
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if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src)) |
|
ip6->ip6_src.s6_addr16[1] |
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= htons(m->m_pkthdr.rcvif->if_index); |
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if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) |
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ip6->ip6_dst.s6_addr16[1] |
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= htons(m->m_pkthdr.rcvif->if_index); |
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|
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/* |
|
* We use rt->rt_ifp to determine if the address is ours or not. |
|
* If rt_ifp is lo0, the address is ours. |
|
* The problem here is, rt->rt_ifp for fe80::%lo0/64 is set to lo0, |
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* so any address under fe80::%lo0/64 will be mistakenly considered |
|
* local. The special case is supplied to handle the case properly |
|
* by actually looking at interface addresses |
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* (using in6ifa_ifpwithaddr). |
|
*/ |
|
if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) != 0 && |
|
IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) { |
|
if (!in6ifa_ifpwithaddr(m->m_pkthdr.rcvif, &ip6->ip6_dst)) { |
|
icmp6_error(m, ICMP6_DST_UNREACH, |
|
ICMP6_DST_UNREACH_ADDR, 0); |
|
/* m is already freed */ |
|
return; |
|
} |
|
|
|
ours = 1; |
|
deliverifp = m->m_pkthdr.rcvif; |
|
goto hbhcheck; |
} |
} |
|
|
/* |
/* |
|
|
*/ |
*/ |
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { |
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { |
struct in6_multi *in6m = 0; |
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 |
* See if we belong to the destination multicast group on the |
* arrival interface. |
* arrival interface. |
|
|
else if (!ip6_mrouter) { |
else if (!ip6_mrouter) { |
ip6stat.ip6s_notmember++; |
ip6stat.ip6s_notmember++; |
ip6stat.ip6s_cantforward++; |
ip6stat.ip6s_cantforward++; |
|
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); |
goto bad; |
goto bad; |
} |
} |
|
deliverifp = m->m_pkthdr.rcvif; |
goto hbhcheck; |
goto hbhcheck; |
} |
} |
|
|
/* |
/* |
* Unicast check |
* Unicast check |
*/ |
*/ |
if (ip6_forward_rt.ro_rt == 0 || |
if (ip6_forward_rt.ro_rt != NULL && |
!IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, |
(ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 && |
&ip6_forward_rt.ro_dst.sin6_addr)) { |
IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, |
|
&((struct sockaddr_in6 *)(&ip6_forward_rt.ro_dst))->sin6_addr)) |
|
ip6stat.ip6s_forward_cachehit++; |
|
else { |
|
struct sockaddr_in6 *dst6; |
|
|
if (ip6_forward_rt.ro_rt) { |
if (ip6_forward_rt.ro_rt) { |
|
/* route is down or destination is different */ |
|
ip6stat.ip6s_forward_cachemiss++; |
RTFREE(ip6_forward_rt.ro_rt); |
RTFREE(ip6_forward_rt.ro_rt); |
ip6_forward_rt.ro_rt = 0; |
ip6_forward_rt.ro_rt = 0; |
} |
} |
|
|
bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6)); |
bzero(&ip6_forward_rt.ro_dst, sizeof(struct sockaddr_in6)); |
ip6_forward_rt.ro_dst.sin6_len = sizeof(struct sockaddr_in6); |
dst6 = (struct sockaddr_in6 *)&ip6_forward_rt.ro_dst; |
ip6_forward_rt.ro_dst.sin6_family = AF_INET6; |
dst6->sin6_len = sizeof(struct sockaddr_in6); |
ip6_forward_rt.ro_dst.sin6_addr = ip6->ip6_dst; |
dst6->sin6_family = AF_INET6; |
|
dst6->sin6_addr = ip6->ip6_dst; |
|
|
#if defined(__bsdi__) || defined(__NetBSD__) |
|
rtalloc((struct route *)&ip6_forward_rt); |
rtalloc((struct route *)&ip6_forward_rt); |
#endif |
|
#ifdef __FreeBSD__ |
|
rtalloc_ign((struct route *)&ip6_forward_rt, RTF_PRCLONING); |
|
#endif |
|
} |
} |
|
|
#define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key)) |
#define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key)) |
|
|
if (ip6_forward_rt.ro_rt && |
if (ip6_forward_rt.ro_rt && |
(ip6_forward_rt.ro_rt->rt_flags & |
(ip6_forward_rt.ro_rt->rt_flags & |
(RTF_HOST|RTF_GATEWAY)) == RTF_HOST && |
(RTF_HOST|RTF_GATEWAY)) == RTF_HOST && |
|
!(ip6_forward_rt.ro_rt->rt_flags & RTF_CLONED) && |
#if 0 |
#if 0 |
/* |
/* |
* The check below is redundant since the comparison of |
* The check below is redundant since the comparison of |
|
|
* already done through looking up the routing table. |
* already done through looking up the routing table. |
*/ |
*/ |
IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, |
IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, |
&rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) && |
&rt6_key(ip6_forward_rt.ro_rt)->sin6_addr) && |
#endif |
|
#ifdef __bsdi__ |
|
ip6_foward.rt.ro_rt->rt_ifp == &loif |
|
#else |
|
ip6_forward_rt.ro_rt->rt_ifp == &loif[0] |
|
#endif |
#endif |
) { |
ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) { |
struct in6_ifaddr *ia6 = |
struct in6_ifaddr *ia6 = |
(struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa; |
(struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa; |
/* packet to tentative address must not be received */ |
|
if (ia6->ia6_flags & IN6_IFF_ANYCAST) |
if (ia6->ia6_flags & IN6_IFF_ANYCAST) |
m->m_flags |= M_ANYCAST6; |
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)) { |
if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) { |
/* this interface is ready */ |
/* this address is ready */ |
ours = 1; |
ours = 1; |
|
deliverifp = ia6->ia_ifp; /* correct? */ |
goto hbhcheck; |
goto hbhcheck; |
} else { |
} else { |
/* this interface is not ready, fall through */ |
/* 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) |
* FAITH (Firewall Aided Internet Translator) |
*/ |
*/ |
#if defined(NFAITH) && 0 < NFAITH |
#if defined(NFAITH) && 0 < NFAITH |
if (ip6_keepfaith) { |
if (ip6_keepfaith) { |
|
|
&& ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) { |
&& ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_FAITH) { |
/* XXX do we need more sanity checks? */ |
/* XXX do we need more sanity checks? */ |
ours = 1; |
ours = 1; |
|
deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */ |
goto hbhcheck; |
goto hbhcheck; |
} |
} |
} |
} |
#endif |
#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; |
|
for (ifa = m->m_pkthdr.rcvif->if_addrlist.tqh_first; |
|
ifa; |
|
ifa = ifa->ifa_list.tqe_next) { |
|
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 |
* Now there is no reason to process the packet if it's not our own |
* and we're not a router. |
* and we're not a router. |
*/ |
*/ |
if (!ip6_forwarding) { |
if (!ip6_forwarding) { |
ip6stat.ip6s_cantforward++; |
ip6stat.ip6s_cantforward++; |
|
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); |
goto bad; |
goto bad; |
} |
} |
|
|
|
|
*/ |
*/ |
plen = (u_int32_t)ntohs(ip6->ip6_plen); |
plen = (u_int32_t)ntohs(ip6->ip6_plen); |
if (ip6->ip6_nxt == IPPROTO_HOPOPTS) { |
if (ip6->ip6_nxt == IPPROTO_HOPOPTS) { |
if (ip6_hopopts_input(&plen, &rtalert, &m, &off)) |
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 */ |
return; /* m have already been freed */ |
|
} |
|
|
/* adjust pointer */ |
/* adjust pointer */ |
ip6 = mtod(m, struct ip6_hdr *); |
ip6 = mtod(m, struct ip6_hdr *); |
nxt = ((struct ip6_hbh *)(ip6 + 1))->ip6h_nxt; |
|
|
/* |
|
* 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_hoptops_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, |
|
(caddr_t)&ip6->ip6_plen - (caddr_t)ip6); |
|
return; |
|
} |
|
#ifndef PULLDOWN_TEST |
|
/* ip6_hopopts_input() ensures that mbuf is contiguous */ |
|
hbh = (struct ip6_hbh *)(ip6 + 1); |
|
#else |
|
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr), |
|
sizeof(struct ip6_hbh)); |
|
if (hbh == NULL) { |
|
ip6stat.ip6s_tooshort++; |
|
return; |
|
} |
|
#endif |
|
KASSERT(IP6_HDR_ALIGNED_P(hbh)); |
|
nxt = hbh->ip6h_nxt; |
|
|
/* |
/* |
* accept the packet if a router alert option is included |
* accept the packet if a router alert option is included |
|
|
*/ |
*/ |
if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) { |
if (m->m_pkthdr.len - sizeof(struct ip6_hdr) < plen) { |
ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
|
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated); |
goto bad; |
goto bad; |
} |
} |
if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) { |
if (m->m_pkthdr.len > sizeof(struct ip6_hdr) + plen) { |
|
|
m_freem(m); |
m_freem(m); |
return; |
return; |
} |
} |
} |
} else if (!ours) { |
else if (!ours) { |
|
ip6_forward(m, 0); |
ip6_forward(m, 0); |
return; |
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 |
* 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++; |
ip6stat.ip6s_delivered++; |
|
in6_ifstat_inc(deliverifp, ifs6_in_deliver); |
nest = 0; |
nest = 0; |
|
|
while (nxt != IPPROTO_DONE) { |
while (nxt != IPPROTO_DONE) { |
if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) { |
if (ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) { |
ip6stat.ip6s_toomanyhdr++; |
ip6stat.ip6s_toomanyhdr++; |
goto bad; |
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; |
|
} |
|
|
|
#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 |
|
|
nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt); |
nxt = (*inet6sw[ip6_protox[nxt]].pr_input)(&m, &off, nxt); |
} |
} |
return; |
return; |
Line 532 ip6_hopopts_input(plenp, rtalertp, mp, o |
|
Line 776 ip6_hopopts_input(plenp, rtalertp, mp, o |
|
struct mbuf **mp; |
struct mbuf **mp; |
int *offp; |
int *offp; |
{ |
{ |
register struct mbuf *m = *mp; |
struct mbuf *m = *mp; |
int off = *offp, hbhlen; |
int off = *offp, hbhlen; |
struct ip6_hbh *hbh; |
struct ip6_hbh *hbh; |
u_int8_t *opt; |
u_int8_t *opt; |
|
|
/* validation of the length of the header */ |
/* validation of the length of the header */ |
|
#ifndef PULLDOWN_TEST |
IP6_EXTHDR_CHECK(m, off, sizeof(*hbh), -1); |
IP6_EXTHDR_CHECK(m, off, sizeof(*hbh), -1); |
hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off); |
hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off); |
hbhlen = (hbh->ip6h_len + 1) << 3; |
hbhlen = (hbh->ip6h_len + 1) << 3; |
|
|
IP6_EXTHDR_CHECK(m, off, hbhlen, -1); |
IP6_EXTHDR_CHECK(m, off, hbhlen, -1); |
hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off); |
hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off); |
|
#else |
|
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; |
|
} |
|
#endif |
|
KASSERT(IP6_HDR_ALIGNED_P(hbh)); |
off += hbhlen; |
off += hbhlen; |
hbhlen -= sizeof(struct ip6_hbh); |
hbhlen -= sizeof(struct ip6_hbh); |
opt = (u_int8_t *)hbh + sizeof(struct ip6_hbh); |
opt = (u_int8_t *)hbh + sizeof(struct ip6_hbh); |
Line 562 ip6_hopopts_input(plenp, rtalertp, mp, o |
|
Line 823 ip6_hopopts_input(plenp, rtalertp, mp, o |
|
* This function is separate from ip6_hopopts_input() in order to |
* This function is separate from ip6_hopopts_input() in order to |
* handle a case where the sending node itself process its hop-by-hop |
* 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(). |
* 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 |
int |
ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp) |
ip6_process_hopopts(m, opthead, hbhlen, rtalertp, plenp) |
Line 575 ip6_process_hopopts(m, opthead, hbhlen, |
|
Line 840 ip6_process_hopopts(m, opthead, hbhlen, |
|
int optlen = 0; |
int optlen = 0; |
u_int8_t *opt = opthead; |
u_int8_t *opt = opthead; |
u_int16_t rtalert_val; |
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) { |
for (; hbhlen > 0; hbhlen -= optlen, opt += optlen) { |
switch(*opt) { |
switch (*opt) { |
case IP6OPT_PAD1: |
case IP6OPT_PAD1: |
optlen = 1; |
optlen = 1; |
break; |
break; |
case IP6OPT_PADN: |
case IP6OPT_PADN: |
if (hbhlen < IP6OPT_MINLEN) { |
if (hbhlen < IP6OPT_MINLEN) { |
ip6stat.ip6s_toosmall++; |
ip6stat.ip6s_toosmall++; |
goto bad; |
goto bad; |
} |
} |
optlen = *(opt + 1) + 2; |
optlen = *(opt + 1) + 2; |
break; |
break; |
case IP6OPT_RTALERT: |
case IP6OPT_RTALERT: |
if (hbhlen < IP6OPT_RTALERT_LEN) { |
/* XXX may need check for alignment */ |
ip6stat.ip6s_toosmall++; |
if (hbhlen < IP6OPT_RTALERT_LEN) { |
goto bad; |
ip6stat.ip6s_toosmall++; |
} |
goto bad; |
if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) |
} |
/* XXX: should we discard the packet? */ |
if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) { |
log(LOG_ERR, "length of router alert opt is inconsitent(%d)", |
/* XXX stat */ |
*(opt + 1)); |
icmp6_error(m, ICMP6_PARAM_PROB, |
optlen = IP6OPT_RTALERT_LEN; |
ICMP6_PARAMPROB_HEADER, |
bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2); |
erroff + opt + 1 - opthead); |
*rtalertp = ntohs(rtalert_val); |
return (-1); |
break; |
} |
case IP6OPT_JUMBO: |
optlen = IP6OPT_RTALERT_LEN; |
if (hbhlen < IP6OPT_JUMBO_LEN) { |
bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2); |
ip6stat.ip6s_toosmall++; |
*rtalertp = ntohs(rtalert_val); |
goto bad; |
break; |
} |
case IP6OPT_JUMBO: |
if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) |
/* XXX may need check for alignment */ |
/* XXX: should we discard the packet? */ |
if (hbhlen < IP6OPT_JUMBO_LEN) { |
log(LOG_ERR, "length of jumbopayload opt " |
ip6stat.ip6s_toosmall++; |
"is inconsistent(%d)", |
goto bad; |
*(opt + 1)); |
} |
optlen = IP6OPT_JUMBO_LEN; |
if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) { |
|
/* XXX stat */ |
/* |
icmp6_error(m, ICMP6_PARAM_PROB, |
* We can simply cast because of the alignment |
ICMP6_PARAMPROB_HEADER, |
* requirement of the jumbo payload option. |
erroff + opt + 1 - opthead); |
*/ |
return (-1); |
*plenp = ntohl(*(u_int32_t *)(opt + 2)); |
} |
if (*plenp <= IPV6_MAXPACKET) { |
optlen = IP6OPT_JUMBO_LEN; |
/* |
|
* jumbo payload length must be larger |
/* |
* than 65535 |
* IPv6 packets that have non 0 payload length |
*/ |
* must not contain a jumbo payload option. |
ip6stat.ip6s_badoptions++; |
*/ |
icmp6_error(m, ICMP6_PARAM_PROB, |
ip6 = mtod(m, struct ip6_hdr *); |
ICMP6_PARAMPROB_HEADER, |
if (ip6->ip6_plen) { |
sizeof(struct ip6_hdr) + |
ip6stat.ip6s_badoptions++; |
sizeof(struct ip6_hbh) + |
icmp6_error(m, ICMP6_PARAM_PROB, |
opt + 2 - opthead); |
ICMP6_PARAMPROB_HEADER, |
return(-1); |
erroff + opt - opthead); |
} |
return (-1); |
|
} |
ip6 = mtod(m, struct ip6_hdr *); |
|
if (ip6->ip6_plen) { |
/* |
/* |
* We may see jumbolen in unaligned location, so |
* IPv6 packets that have non 0 payload length |
* we'd need to perform bcopy(). |
* must not contain a jumbo paylod option. |
*/ |
*/ |
bcopy(opt + 2, &jumboplen, sizeof(jumboplen)); |
ip6stat.ip6s_badoptions++; |
jumboplen = (u_int32_t)htonl(jumboplen); |
icmp6_error(m, ICMP6_PARAM_PROB, |
|
ICMP6_PARAMPROB_HEADER, |
#if 1 |
sizeof(struct ip6_hdr) + |
/* |
sizeof(struct ip6_hbh) + |
* if there are multiple jumbo payload options, |
opt - opthead); |
* *plenp will be non-zero and the packet will be |
return(-1); |
* rejected. |
} |
* the behavior may need some debate in ipngwg - |
break; |
* multiple options does not make sense, however, |
default: /* unknown option */ |
* there's no explicit mention in specification. |
if (hbhlen < IP6OPT_MINLEN) { |
*/ |
ip6stat.ip6s_toosmall++; |
if (*plenp != 0) { |
goto bad; |
ip6stat.ip6s_badoptions++; |
} |
icmp6_error(m, ICMP6_PARAM_PROB, |
if ((optlen = ip6_unknown_opt(opt, m, |
ICMP6_PARAMPROB_HEADER, |
sizeof(struct ip6_hdr) + |
erroff + opt + 2 - opthead); |
sizeof(struct ip6_hbh) + |
return (-1); |
opt - opthead)) == -1) |
} |
return(-1); |
#endif |
optlen += 2; |
|
break; |
/* |
|
* 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); |
return (0); |
|
|
bad: |
bad: |
m_freem(m); |
m_freem(m); |
return(-1); |
return (-1); |
} |
} |
|
|
/* |
/* |
Line 683 ip6_unknown_opt(optp, m, off) |
|
Line 973 ip6_unknown_opt(optp, m, off) |
|
{ |
{ |
struct ip6_hdr *ip6; |
struct ip6_hdr *ip6; |
|
|
switch(IP6OPT_TYPE(*optp)) { |
switch (IP6OPT_TYPE(*optp)) { |
case IP6OPT_TYPE_SKIP: /* ignore the option */ |
case IP6OPT_TYPE_SKIP: /* ignore the option */ |
return((int)*(optp + 1)); |
return((int)*(optp + 1)); |
case IP6OPT_TYPE_DISCARD: /* silently discard */ |
case IP6OPT_TYPE_DISCARD: /* silently discard */ |
m_freem(m); |
m_freem(m); |
return(-1); |
return(-1); |
case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */ |
case IP6OPT_TYPE_FORCEICMP: /* send ICMP even if multicasted */ |
ip6stat.ip6s_badoptions++; |
ip6stat.ip6s_badoptions++; |
icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off); |
icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_OPTION, off); |
return(-1); |
return(-1); |
case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */ |
case IP6OPT_TYPE_ICMP: /* send ICMP if not multicasted */ |
ip6stat.ip6s_badoptions++; |
ip6stat.ip6s_badoptions++; |
ip6 = mtod(m, struct ip6_hdr *); |
ip6 = mtod(m, struct ip6_hdr *); |
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) || |
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) || |
(m->m_flags & (M_BCAST|M_MCAST))) |
(m->m_flags & (M_BCAST|M_MCAST))) |
m_freem(m); |
m_freem(m); |
else |
else |
icmp6_error(m, ICMP6_PARAM_PROB, |
icmp6_error(m, ICMP6_PARAM_PROB, |
ICMP6_PARAMPROB_OPTION, off); |
ICMP6_PARAMPROB_OPTION, off); |
return(-1); |
return(-1); |
} |
} |
|
|
m_freem(m); /* XXX: NOTREACHED */ |
m_freem(m); /* XXX: NOTREACHED */ |
Line 710 ip6_unknown_opt(optp, m, off) |
|
Line 1000 ip6_unknown_opt(optp, m, off) |
|
} |
} |
|
|
/* |
/* |
* Create the "control" list for this pcb |
* 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 |
void |
ip6_savecontrol(in6p, mp, ip6, m) |
ip6_savecontrol(in6p, mp, ip6, m) |
register struct in6pcb *in6p; |
struct in6pcb *in6p; |
register struct mbuf **mp; |
struct mbuf **mp; |
register struct ip6_hdr *ip6; |
struct ip6_hdr *ip6; |
register struct mbuf *m; |
struct mbuf *m; |
{ |
{ |
#ifdef __NetBSD__ |
|
struct proc *p = curproc; /* XXX */ |
struct proc *p = curproc; /* XXX */ |
#endif |
int privileged; |
#ifdef __bsdi__ |
|
# define sbcreatecontrol so_cmsg |
|
#endif |
|
|
|
|
privileged = 0; |
|
if (p && !suser(p->p_ucred, &p->p_acflag)) |
|
privileged++; |
|
|
|
#ifdef SO_TIMESTAMP |
if (in6p->in6p_socket->so_options & SO_TIMESTAMP) { |
if (in6p->in6p_socket->so_options & SO_TIMESTAMP) { |
struct timeval tv; |
struct timeval tv; |
|
|
Line 735 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1034 ip6_savecontrol(in6p, mp, ip6, m) |
|
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
|
#endif |
if (in6p->in6p_flags & IN6P_RECVDSTADDR) { |
if (in6p->in6p_flags & IN6P_RECVDSTADDR) { |
*mp = sbcreatecontrol((caddr_t) &ip6->ip6_dst, |
*mp = sbcreatecontrol((caddr_t) &ip6->ip6_dst, |
sizeof(struct in6_addr), IPV6_RECVDSTADDR, |
sizeof(struct in6_addr), IPV6_RECVDSTADDR, |
Line 753 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1053 ip6_savecontrol(in6p, mp, ip6, m) |
|
#endif |
#endif |
|
|
/* RFC 2292 sec. 5 */ |
/* RFC 2292 sec. 5 */ |
if (in6p->in6p_flags & IN6P_PKTINFO) { |
if ((in6p->in6p_flags & IN6P_PKTINFO) != 0) { |
struct in6_pktinfo pi6; |
struct in6_pktinfo pi6; |
bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr)); |
bcopy(&ip6->ip6_dst, &pi6.ipi6_addr, sizeof(struct in6_addr)); |
if (IN6_IS_SCOPE_LINKLOCAL(&pi6.ipi6_addr)) |
if (IN6_IS_SCOPE_LINKLOCAL(&pi6.ipi6_addr)) |
Line 782 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1082 ip6_savecontrol(in6p, mp, ip6, m) |
|
* be some hop-by-hop options which can be returned to normal user. |
* be some hop-by-hop options which can be returned to normal user. |
* See RFC 2292 section 6. |
* See RFC 2292 section 6. |
*/ |
*/ |
if ((in6p->in6p_flags & IN6P_HOPOPTS) && |
if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0 && privileged) { |
p && !suser(p->p_ucred, &p->p_acflag)) { |
|
/* |
/* |
* Check if a hop-by-hop options header is contatined in the |
* Check if a hop-by-hop options header is contatined in the |
* received packet, and if so, store the options as ancillary |
* received packet, and if so, store the options as ancillary |
Line 793 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1092 ip6_savecontrol(in6p, mp, ip6, m) |
|
*/ |
*/ |
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); |
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); |
if (ip6->ip6_nxt == IPPROTO_HOPOPTS) { |
if (ip6->ip6_nxt == IPPROTO_HOPOPTS) { |
struct ip6_hbh *hbh = (struct ip6_hbh *)(ip6 + 1); |
struct ip6_hbh *hbh; |
|
int hbhlen; |
|
|
|
#ifndef PULLDOWN_TEST |
|
hbh = (struct ip6_hbh *)(ip6 + 1); |
|
hbhlen = (hbh->ip6h_len + 1) << 3; |
|
#else |
|
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, |
|
sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); |
|
if (hbh == NULL) { |
|
ip6stat.ip6s_tooshort++; |
|
return; |
|
} |
|
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; |
|
} |
|
#endif |
|
|
/* |
/* |
* XXX: We copy whole the header even if a jumbo |
* XXX: We copy whole the header even if a jumbo |
Line 801 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1120 ip6_savecontrol(in6p, mp, ip6, m) |
|
* be removed before returning in the RFC 2292. |
* be removed before returning in the RFC 2292. |
* But it's too painful operation... |
* But it's too painful operation... |
*/ |
*/ |
*mp = sbcreatecontrol((caddr_t)hbh, |
*mp = sbcreatecontrol((caddr_t)hbh, hbhlen, |
(hbh->ip6h_len + 1) << 3, |
|
IPV6_HOPOPTS, IPPROTO_IPV6); |
IPV6_HOPOPTS, IPPROTO_IPV6); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
Line 821 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1139 ip6_savecontrol(in6p, mp, ip6, m) |
|
* Note that the order of the headers remains in |
* Note that the order of the headers remains in |
* the chain of ancillary data. |
* the chain of ancillary data. |
*/ |
*/ |
while(1) { /* is explicit loop prevention necessary? */ |
while (1) { /* is explicit loop prevention necessary? */ |
struct ip6_ext *ip6e = |
struct ip6_ext *ip6e; |
(struct ip6_ext *)(mtod(m, caddr_t) + off); |
int elen; |
|
|
switch(nxt) { |
|
case IPPROTO_DSTOPTS: |
|
if (!in6p->in6p_flags & IN6P_DSTOPTS) |
|
break; |
|
|
|
/* |
|
* We also require super-user privilege for |
|
* the option. |
|
* See the comments on IN6_HOPOPTS. |
|
*/ |
|
if (!p || !suser(p->p_ucred, &p->p_acflag)) |
|
break; |
|
|
|
*mp = sbcreatecontrol((caddr_t)ip6e, |
|
(ip6e->ip6e_len + 1) << 3, |
|
IPV6_DSTOPTS, |
|
IPPROTO_IPV6); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
break; |
|
|
|
case IPPROTO_ROUTING: |
|
if (!in6p->in6p_flags & IN6P_RTHDR) |
|
break; |
|
|
|
*mp = sbcreatecontrol((caddr_t)ip6e, |
|
(ip6e->ip6e_len + 1) << 3, |
|
IPV6_RTHDR, |
|
IPPROTO_IPV6); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
break; |
|
|
|
case IPPROTO_UDP: |
|
case IPPROTO_TCP: |
|
case IPPROTO_ICMPV6: |
|
default: |
|
/* |
|
* stop search if we encounter an upper |
|
* layer protocol headers. |
|
*/ |
|
goto loopend; |
|
|
|
case IPPROTO_HOPOPTS: |
|
case IPPROTO_AH: /* is it possible? */ |
|
break; |
|
} |
|
|
|
/* proceed with the next header. */ |
#ifndef PULLDOWN_TEST |
|
ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + off); |
if (nxt == IPPROTO_AH) |
if (nxt == IPPROTO_AH) |
off += (ip6e->ip6e_len + 2) << 2; |
elen = (ip6e->ip6e_len + 2) << 2; |
else |
else |
off += (ip6e->ip6e_len + 1) << 3; |
elen = (ip6e->ip6e_len + 1) << 3; |
|
#else |
|
IP6_EXTHDR_GET(ip6e, struct ip6_ext *, m, off, |
|
sizeof(struct ip6_ext)); |
|
if (ip6e == NULL) { |
|
ip6stat.ip6s_tooshort++; |
|
return; |
|
} |
|
if (nxt == IPPROTO_AH) |
|
elen = (ip6e->ip6e_len + 2) << 2; |
|
else |
|
elen = (ip6e->ip6e_len + 1) << 3; |
|
IP6_EXTHDR_GET(ip6e, struct ip6_ext *, m, off, elen); |
|
if (ip6e == NULL) { |
|
ip6stat.ip6s_tooshort++; |
|
return; |
|
} |
|
#endif |
|
KASSERT(IP6_HDR_ALIGNED_P(ip6e)); |
|
|
|
switch (nxt) { |
|
case IPPROTO_DSTOPTS: |
|
if (!in6p->in6p_flags & IN6P_DSTOPTS) |
|
break; |
|
|
|
/* |
|
* We also require super-user privilege for |
|
* the option. |
|
* See the comments on IN6_HOPOPTS. |
|
*/ |
|
if (!privileged) |
|
break; |
|
|
|
*mp = sbcreatecontrol((caddr_t)ip6e, elen, |
|
IPV6_DSTOPTS, |
|
IPPROTO_IPV6); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
break; |
|
|
|
case IPPROTO_ROUTING: |
|
if (!in6p->in6p_flags & IN6P_RTHDR) |
|
break; |
|
|
|
*mp = sbcreatecontrol((caddr_t)ip6e, elen, |
|
IPV6_RTHDR, |
|
IPPROTO_IPV6); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
break; |
|
|
|
case IPPROTO_UDP: |
|
case IPPROTO_TCP: |
|
case IPPROTO_ICMPV6: |
|
default: |
|
/* |
|
* stop search if we encounter an upper |
|
* layer protocol headers. |
|
*/ |
|
goto loopend; |
|
|
|
case IPPROTO_HOPOPTS: |
|
case IPPROTO_AH: /* is it possible? */ |
|
break; |
|
} |
|
|
|
/* proceed with the next header. */ |
|
off += elen; |
nxt = ip6e->ip6e_nxt; |
nxt = ip6e->ip6e_nxt; |
} |
} |
loopend: |
loopend: |
|
; |
} |
} |
if ((in6p->in6p_flags & IN6P_HOPOPTS) |
if ((in6p->in6p_flags & IN6P_HOPOPTS) && privileged) { |
&& p && !suser(p->p_ucred, &p->p_acflag)) { |
|
/* to be done */ |
/* to be done */ |
} |
} |
if ((in6p->in6p_flags & IN6P_DSTOPTS) |
if ((in6p->in6p_flags & IN6P_DSTOPTS) && privileged) { |
&& p && !suser(p->p_ucred, &p->p_acflag)) { |
|
/* to be done */ |
/* to be done */ |
} |
} |
/* IN6P_RTHDR - to be done */ |
/* IN6P_RTHDR - to be done */ |
|
|
#ifdef __bsdi__ |
|
# undef sbcreatecontrol |
|
#endif |
|
} |
} |
|
|
/* |
/* |
Line 927 ip6_get_prevhdr(m, off) |
|
Line 1261 ip6_get_prevhdr(m, off) |
|
while (len < off) { |
while (len < off) { |
ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len); |
ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + len); |
|
|
switch(nxt) { |
switch (nxt) { |
case IPPROTO_FRAGMENT: |
case IPPROTO_FRAGMENT: |
len += sizeof(struct ip6_frag); |
len += sizeof(struct ip6_frag); |
break; |
break; |
Line 948 ip6_get_prevhdr(m, off) |
|
Line 1282 ip6_get_prevhdr(m, off) |
|
} |
} |
|
|
/* |
/* |
|
* get next header offset. m will be retained. |
|
*/ |
|
int |
|
ip6_nexthdr(m, off, proto, nxtp) |
|
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: |
|
if (m->m_pkthdr.len < off + sizeof(ip6)) |
|
return -1; |
|
m_copydata(m, off, sizeof(ip6), (caddr_t)&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), (caddr_t)&fh); |
|
if ((ntohs(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), (caddr_t)&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), (caddr_t)&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; |
|
} |
|
|
|
return -1; |
|
} |
|
|
|
/* |
|
* get offset for the last header in the chain. m will be kept untainted. |
|
*/ |
|
int |
|
ip6_lasthdr(m, off, proto, nxtp) |
|
struct mbuf *m; |
|
int off; |
|
int proto; |
|
int *nxtp; |
|
{ |
|
int newoff; |
|
int nxt; |
|
|
|
if (!nxtp) { |
|
nxt = -1; |
|
nxtp = &nxt; |
|
} |
|
while (1) { |
|
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; |
|
} |
|
} |
|
|
|
/* |
* System control for IP6 |
* System control for IP6 |
*/ |
*/ |
|
|
Line 960 u_char inet6ctlerrmap[PRC_NCMDS] = { |
|
Line 1407 u_char inet6ctlerrmap[PRC_NCMDS] = { |
|
ENOPROTOOPT |
ENOPROTOOPT |
}; |
}; |
|
|
#ifdef __NetBSD__ |
|
#include <vm/vm.h> |
|
#include <sys/sysctl.h> |
|
|
|
int |
int |
ip6_sysctl(name, namelen, oldp, oldlenp, newp, newlen) |
ip6_sysctl(name, namelen, oldp, oldlenp, newp, newlen) |
int *name; |
int *name; |
Line 973 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1416 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
void *newp; |
void *newp; |
size_t newlen; |
size_t newlen; |
{ |
{ |
|
int old, error; |
|
|
/* All sysctl names at this level are terminal. */ |
/* All sysctl names at this level are terminal. */ |
if (namelen != 1) |
if (namelen != 1) |
return ENOTDIR; |
return ENOTDIR; |
Line 1009 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1454 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
case IPV6CTL_DEFMCASTHLIM: |
case IPV6CTL_DEFMCASTHLIM: |
return sysctl_int(oldp, oldlenp, newp, newlen, |
return sysctl_int(oldp, oldlenp, newp, newlen, |
&ip6_defmcasthlim); |
&ip6_defmcasthlim); |
|
#if NGIF > 0 |
case IPV6CTL_GIF_HLIM: |
case IPV6CTL_GIF_HLIM: |
return sysctl_int(oldp, oldlenp, newp, newlen, |
return sysctl_int(oldp, oldlenp, newp, newlen, |
&ip6_gif_hlim); |
&ip6_gif_hlim); |
|
#endif |
case IPV6CTL_KAME_VERSION: |
case IPV6CTL_KAME_VERSION: |
return sysctl_rdstring(oldp, oldlenp, newp, __KAME_VERSION); |
return sysctl_rdstring(oldp, oldlenp, newp, __KAME_VERSION); |
|
case IPV6CTL_USE_DEPRECATED: |
|
return sysctl_int(oldp, oldlenp, newp, newlen, |
|
&ip6_use_deprecated); |
|
case IPV6CTL_RR_PRUNE: |
|
return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_rr_prune); |
|
case IPV6CTL_V6ONLY: |
|
#ifdef INET6_BINDV6ONLY |
|
return sysctl_rdint(oldp, oldlenp, newp, ip6_v6only); |
|
#else |
|
return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_v6only); |
|
#endif |
|
case IPV6CTL_ANONPORTMIN: |
|
old = ip6_anonportmin; |
|
error = sysctl_int(oldp, oldlenp, newp, newlen, |
|
&ip6_anonportmin); |
|
if (ip6_anonportmin >= ip6_anonportmax || ip6_anonportmin < 0 || |
|
ip6_anonportmin > 65535 |
|
#ifndef IPNOPRIVPORTS |
|
|| ip6_anonportmin < IPV6PORT_RESERVED |
|
#endif |
|
) { |
|
ip6_anonportmin = old; |
|
return (EINVAL); |
|
} |
|
return (error); |
|
case IPV6CTL_ANONPORTMAX: |
|
old = ip6_anonportmax; |
|
error = sysctl_int(oldp, oldlenp, newp, newlen, |
|
&ip6_anonportmax); |
|
if (ip6_anonportmin >= ip6_anonportmax || ip6_anonportmax < 0 || |
|
ip6_anonportmax > 65535 |
|
#ifndef IPNOPRIVPORTS |
|
|| ip6_anonportmax < IPV6PORT_RESERVED |
|
#endif |
|
) { |
|
ip6_anonportmax = old; |
|
return (EINVAL); |
|
} |
|
return (error); |
|
#ifndef IPNOPRIVPORTS |
|
case IPV6CTL_LOWPORTMIN: |
|
old = ip6_lowportmin; |
|
error = sysctl_int(oldp, oldlenp, newp, newlen, |
|
&ip6_lowportmin); |
|
if (ip6_lowportmin >= ip6_lowportmax || |
|
ip6_lowportmin > IPV6PORT_RESERVEDMAX || |
|
ip6_lowportmin < IPV6PORT_RESERVEDMIN) { |
|
ip6_lowportmin = old; |
|
return (EINVAL); |
|
} |
|
return (error); |
|
case IPV6CTL_LOWPORTMAX: |
|
old = ip6_lowportmax; |
|
error = sysctl_int(oldp, oldlenp, newp, newlen, |
|
&ip6_lowportmax); |
|
if (ip6_lowportmin >= ip6_lowportmax || |
|
ip6_lowportmax > IPV6PORT_RESERVEDMAX || |
|
ip6_lowportmax < IPV6PORT_RESERVEDMIN) { |
|
ip6_lowportmax = old; |
|
return (EINVAL); |
|
} |
|
return (error); |
|
#endif |
|
case IPV6CTL_MAXFRAGS: |
|
return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_maxfrags); |
default: |
default: |
return EOPNOTSUPP; |
return EOPNOTSUPP; |
} |
} |
/* NOTREACHED */ |
/* NOTREACHED */ |
} |
} |
#endif /* __NetBSD__ */ |
|