version 1.22.2.6, 2004/04/07 22:40:58 |
version 1.52.2.1, 2002/05/30 13:52:32 |
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/* $NetBSD$ */ |
/* $NetBSD$ */ |
/* $KAME: ip6_input.c,v 1.119 2000/08/26 10:00:45 itojun Exp $ */ |
/* $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. |
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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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#include <sys/cdefs.h> |
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__KERNEL_RCSID(0, "$NetBSD$"); |
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#include "opt_inet.h" |
#include "opt_inet.h" |
#include "opt_ipsec.h" |
#include "opt_ipsec.h" |
#include "opt_pfil_hooks.h" |
#include "opt_pfil_hooks.h" |
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#include <sys/kernel.h> |
#include <sys/kernel.h> |
#include <sys/syslog.h> |
#include <sys/syslog.h> |
#include <sys/proc.h> |
#include <sys/proc.h> |
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#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> |
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#ifdef INET |
#ifdef INET |
#include <netinet/ip.h> |
#include <netinet/ip.h> |
#include <netinet/ip_icmp.h> |
#include <netinet/ip_icmp.h> |
#endif /*INET*/ |
#endif /* INET */ |
#include <netinet/ip6.h> |
#include <netinet/ip6.h> |
#include <netinet6/in6_var.h> |
#include <netinet6/in6_var.h> |
#include <netinet6/ip6_var.h> |
#include <netinet6/ip6_var.h> |
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#include <netinet6/nd6.h> |
#include <netinet6/nd6.h> |
#include <netinet6/in6_prefix.h> |
#include <netinet6/in6_prefix.h> |
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#ifdef IPV6FIREWALL |
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#include <netinet6/ip6_fw.h> |
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#endif |
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#ifdef IPSEC |
#ifdef IPSEC |
#include <netinet6/ipsec.h> |
#include <netinet6/ipsec.h> |
#endif |
#endif |
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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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#if NGIF > 0 |
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#include <netinet6/in6_gif.h> |
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#endif |
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#include <net/net_osdep.h> |
#include <net/net_osdep.h> |
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extern struct domain inet6domain; |
extern struct domain inet6domain; |
Line 138 int ip6_forward_srcrt; /* XXX */ |
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Line 141 int ip6_forward_srcrt; /* XXX */ |
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int ip6_sourcecheck; /* XXX */ |
int ip6_sourcecheck; /* XXX */ |
int ip6_sourcecheck_interval; /* XXX */ |
int ip6_sourcecheck_interval; /* XXX */ |
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#ifdef IPV6FIREWALL |
#ifdef PFIL_HOOKS |
/* firewall hooks */ |
struct pfil_head inet6_pfil_hook; |
ip6_fw_chk_t *ip6_fw_chk_ptr; |
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ip6_fw_ctl_t *ip6_fw_ctl_ptr; |
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#endif |
#endif |
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struct ip6stat ip6stat; |
struct ip6stat ip6stat; |
Line 157 static int ip6_hopopts_input __P((u_int3 |
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Line 158 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(); |
#ifdef IPV6FIREWALL |
ip6_flow_seq = arc4random(); |
ip6_fw_init(); |
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#endif |
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/* |
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* in many cases, random() here does NOT return random number |
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* 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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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 |
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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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u_int32_t rtalert = ~0; |
u_int32_t rtalert = ~0; |
int nxt, ours = 0; |
int nxt, ours = 0; |
struct ifnet *deliverifp = NULL; |
struct ifnet *deliverifp = NULL; |
#ifdef PFIL_HOOKS |
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struct packet_filter_hook *pfh; |
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struct mbuf *m0; |
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int rv; |
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#endif /* PFIL_HOOKS */ |
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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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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive); |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive); |
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* Note that filters must _never_ set this flag, as another filter |
* Note that filters must _never_ set this flag, as another filter |
* in the list may have previously cleared it. |
* in the list may have previously cleared it. |
*/ |
*/ |
m0 = m; |
/* |
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* let ipfilter look at packet on the wire, |
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* not the decapsulated packet. |
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*/ |
#ifdef IPSEC |
#ifdef IPSEC |
if (ipsec_gethist(m, NULL)) |
if (!ipsec_getnhist(m)) |
pfh = NULL; |
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else |
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pfh = pfil_hook_get(PFIL_IN, |
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&inet6sw[ip6_protox[IPPROTO_IPV6]].pr_pfh); |
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#else |
#else |
pfh = pfil_hook_get(PFIL_IN, &inet6sw[ip6_protox[IPPROTO_IPV6]].pr_pfh); |
if (1) |
#endif |
#endif |
for (; pfh; pfh = pfh->pfil_link.tqe_next) |
{ |
if (pfh->pfil_func) { |
if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif, |
rv = pfh->pfil_func(ip6, sizeof(*ip6), |
PFIL_IN) != 0) |
m->m_pkthdr.rcvif, 0, &m0); |
return; |
if (rv) |
if (m == NULL) |
return; |
return; |
m = m0; |
ip6 = mtod(m, struct ip6_hdr *); |
if (m == NULL) |
} |
return; |
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ip6 = mtod(m, struct ip6_hdr *); |
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} |
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#endif /* PFIL_HOOKS */ |
#endif /* PFIL_HOOKS */ |
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ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; |
ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; |
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#ifdef IPV6FIREWALL |
#ifdef ALTQ |
/* |
if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) { |
* Check with the firewall... |
/* packet is dropped by traffic conditioner */ |
*/ |
return; |
if (ip6_fw_chk_ptr) { |
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u_short port = 0; |
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/* If ipfw says divert, we have to just drop packet */ |
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/* use port as a dummy argument */ |
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if ((*ip6_fw_chk_ptr)(&ip6, NULL, &port, &m)) { |
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m_freem(m); |
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m = NULL; |
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} |
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if (!m) |
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return; |
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} |
} |
#endif |
#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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goto bad; |
goto bad; |
} |
} |
/* |
/* |
* The following check is not documented in the spec. Malicious party |
* The following check is not documented in specs. A malicious |
* may be able to use IPv4 mapped addr to confuse tcp/udp stack and |
* party may be able to use IPv4 mapped addr to confuse tcp/udp stack |
* bypass security checks (act as if it was from 127.0.0.1 by using |
* 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. |
* 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 |
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* 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. |
*/ |
*/ |
if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { |
IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { |
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goto bad; |
goto bad; |
} |
} |
#endif |
#endif |
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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) { |
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} |
} |
} |
} |
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#ifndef FAKE_LOOPBACK_IF |
/* drop packets if interface ID portion is already filled */ |
if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) |
if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) { |
#else |
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src) && |
if (1) |
ip6->ip6_src.s6_addr16[1]) { |
#endif |
ip6stat.ip6s_badscope++; |
{ |
goto bad; |
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src)) |
} |
ip6->ip6_src.s6_addr16[1] |
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst) && |
= htons(m->m_pkthdr.rcvif->if_index); |
ip6->ip6_dst.s6_addr16[1]) { |
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) |
ip6stat.ip6s_badscope++; |
ip6->ip6_dst.s6_addr16[1] |
goto bad; |
= htons(m->m_pkthdr.rcvif->if_index); |
} |
} |
} |
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/* |
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src)) |
* XXX we need this since we do not have "goto ours" hack route |
ip6->ip6_src.s6_addr16[1] |
* for some of our ifaddrs on loopback interface. |
= htons(m->m_pkthdr.rcvif->if_index); |
* we should correct it by changing in6_ifattach to install |
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) |
* "goto ours" hack route. |
ip6->ip6_dst.s6_addr16[1] |
*/ |
= htons(m->m_pkthdr.rcvif->if_index); |
if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) != 0) { |
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if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) { |
/* |
ours = 1; |
* We use rt->rt_ifp to determine if the address is ours or not. |
deliverifp = m->m_pkthdr.rcvif; |
* If rt_ifp is lo0, the address is ours. |
goto hbhcheck; |
* 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 |
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* local. The special case is supplied to handle the case properly |
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* by actually looking at interface addresses |
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* (using in6ifa_ifpwithaddr). |
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*/ |
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if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) != 0 && |
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IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) { |
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if (!in6ifa_ifpwithaddr(m->m_pkthdr.rcvif, &ip6->ip6_dst)) { |
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icmp6_error(m, ICMP6_DST_UNREACH, |
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ICMP6_DST_UNREACH_ADDR, 0); |
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/* m is already freed */ |
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return; |
} |
} |
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ours = 1; |
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deliverifp = m->m_pkthdr.rcvif; |
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goto hbhcheck; |
} |
} |
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/* |
/* |
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if (ip6_forward_rt.ro_rt != NULL && |
if (ip6_forward_rt.ro_rt != NULL && |
(ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 && |
(ip6_forward_rt.ro_rt->rt_flags & RTF_UP) != 0 && |
IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, |
IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, |
&ip6_forward_rt.ro_dst.sin6_addr)) |
&((struct sockaddr_in6 *)(&ip6_forward_rt.ro_dst))->sin6_addr)) |
; /* cache hit */ |
ip6stat.ip6s_forward_cachehit++; |
else { |
else { |
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struct sockaddr_in6 *dst6; |
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if (ip6_forward_rt.ro_rt) { |
if (ip6_forward_rt.ro_rt) { |
/* route is down or destination is different */ |
/* 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; |
} |
} |
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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; |
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rtalloc((struct route *)&ip6_forward_rt); |
rtalloc((struct route *)&ip6_forward_rt); |
} |
} |
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goto hbhcheck; |
goto hbhcheck; |
} else { |
} else { |
/* address is not ready, so discard the packet. */ |
/* address is not ready, so discard the packet. */ |
log(LOG_INFO, |
nd6log((LOG_INFO, |
"ip6_input: packet to an unready address %s->%s", |
"ip6_input: packet to an unready address %s->%s\n", |
ip6_sprintf(&ip6->ip6_src), |
ip6_sprintf(&ip6->ip6_src), |
ip6_sprintf(&ip6->ip6_dst)); |
ip6_sprintf(&ip6->ip6_dst))); |
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|
goto bad; |
goto bad; |
} |
} |
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&& 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*/ |
deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */ |
goto hbhcheck; |
goto hbhcheck; |
} |
} |
} |
} |
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ip6 = mtod(m, struct ip6_hdr *); |
ip6 = mtod(m, struct ip6_hdr *); |
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/* |
/* |
* if the payload length field is 0 and the next header field |
* if the payload length field is 0 and the next header field |
* indicates Hop-by-Hop Options header, then a Jumbo Payload |
* indicates Hop-by-Hop Options header, then a Jumbo Payload |
* option MUST be included. |
* option MUST be included. |
*/ |
*/ |
|
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return; |
return; |
} |
} |
|
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ip6 = mtod(m, struct ip6_hdr *); |
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/* |
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* 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. |
|
* |
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* For SIIT end node behavior, you may want to disable the check. |
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* However, you will become vulnerable to attacks using IPv4 mapped |
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* source. |
|
*/ |
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if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
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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; |
|
} |
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/* |
/* |
* Tell launch routine the next header |
* Tell launch routine the next header |
*/ |
*/ |
#ifdef IFA_STATS |
#ifdef IFA_STATS |
if (IFA_STATS && deliverifp != NULL) { |
if (deliverifp != NULL) { |
struct in6_ifaddr *ia6; |
struct in6_ifaddr *ia6; |
ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); |
ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); |
if (ia6) |
if (ia6) |
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ip6stat.ip6s_delivered++; |
ip6stat.ip6s_delivered++; |
in6_ifstat_inc(deliverifp, ifs6_in_deliver); |
in6_ifstat_inc(deliverifp, ifs6_in_deliver); |
nest = 0; |
nest = 0; |
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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++; |
Line 738 ip6_hopopts_input(plenp, rtalertp, mp, o |
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Line 766 ip6_hopopts_input(plenp, rtalertp, mp, o |
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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; |
Line 800 ip6_process_hopopts(m, opthead, hbhlen, |
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Line 828 ip6_process_hopopts(m, opthead, hbhlen, |
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u_int32_t jumboplen; |
u_int32_t jumboplen; |
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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: |
/* XXX may need check for alignment */ |
|
if (hbhlen < IP6OPT_RTALERT_LEN) { |
|
ip6stat.ip6s_toosmall++; |
|
goto bad; |
|
} |
|
if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) |
|
/* XXX: should we discard the packet? */ |
|
log(LOG_ERR, "length of router alert opt is inconsitent(%d)", |
|
*(opt + 1)); |
|
optlen = IP6OPT_RTALERT_LEN; |
|
bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2); |
|
*rtalertp = ntohs(rtalert_val); |
|
break; |
|
case IP6OPT_JUMBO: |
|
/* XXX may need check for alignment */ |
/* XXX may need check for alignment */ |
if (hbhlen < IP6OPT_JUMBO_LEN) { |
if (hbhlen < IP6OPT_RTALERT_LEN) { |
ip6stat.ip6s_toosmall++; |
ip6stat.ip6s_toosmall++; |
goto bad; |
goto bad; |
} |
} |
if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) |
if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) { |
/* XXX: should we discard the packet? */ |
/* XXX: should we discard the packet? */ |
|
log(LOG_ERR, "length of router alert opt is inconsitent(%d)", |
|
*(opt + 1)); |
|
} |
|
optlen = IP6OPT_RTALERT_LEN; |
|
bcopy((caddr_t)(opt + 2), (caddr_t)&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: should we discard the packet? */ |
log(LOG_ERR, "length of jumbopayload opt " |
log(LOG_ERR, "length of jumbopayload opt " |
"is inconsistent(%d)", |
"is inconsistent(%d)\n", |
*(opt + 1)); |
*(opt + 1)); |
|
} |
optlen = IP6OPT_JUMBO_LEN; |
optlen = IP6OPT_JUMBO_LEN; |
|
|
/* |
/* |
* IPv6 packets that have non 0 payload length |
* IPv6 packets that have non 0 payload length |
* must not contain a jumbo paylod option. |
* must not contain a jumbo payload option. |
*/ |
*/ |
ip6 = mtod(m, struct ip6_hdr *); |
ip6 = mtod(m, struct ip6_hdr *); |
if (ip6->ip6_plen) { |
if (ip6->ip6_plen) { |
Line 895 ip6_process_hopopts(m, opthead, hbhlen, |
|
Line 925 ip6_process_hopopts(m, opthead, hbhlen, |
|
*plenp = jumboplen; |
*plenp = jumboplen; |
|
|
break; |
break; |
default: /* unknown option */ |
default: /* unknown option */ |
if (hbhlen < IP6OPT_MINLEN) { |
if (hbhlen < IP6OPT_MINLEN) { |
ip6stat.ip6s_toosmall++; |
ip6stat.ip6s_toosmall++; |
goto bad; |
goto bad; |
} |
} |
if ((optlen = ip6_unknown_opt(opt, m, |
if ((optlen = ip6_unknown_opt(opt, m, |
sizeof(struct ip6_hdr) + |
sizeof(struct ip6_hdr) + |
sizeof(struct ip6_hbh) + |
sizeof(struct ip6_hbh) + |
opt - opthead)) == -1) |
opt - opthead)) == -1) |
return(-1); |
return(-1); |
optlen += 2; |
optlen += 2; |
break; |
break; |
} |
} |
} |
} |
|
|
Line 931 ip6_unknown_opt(optp, m, off) |
|
Line 961 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 970 ip6_unknown_opt(optp, m, off) |
|
Line 1000 ip6_unknown_opt(optp, m, off) |
|
*/ |
*/ |
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; |
{ |
{ |
struct proc *p = curproc; /* XXX */ |
struct proc *p = curproc; /* XXX */ |
int privileged; |
int privileged; |
Line 1011 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1041 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 1040 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1070 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) && privileged) { |
if ((in6p->in6p_flags & IN6P_HOPOPTS) != 0 && privileged) { |
/* |
/* |
* 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 1097 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1127 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; |
int elen; |
int elen; |
|
|
Line 1125 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1155 ip6_savecontrol(in6p, mp, ip6, m) |
|
} |
} |
#endif |
#endif |
|
|
switch(nxt) { |
switch (nxt) { |
case IPPROTO_DSTOPTS: |
case IPPROTO_DSTOPTS: |
if (!in6p->in6p_flags & IN6P_DSTOPTS) |
if (!in6p->in6p_flags & IN6P_DSTOPTS) |
break; |
break; |
|
|
/* |
/* |
* We also require super-user privilege for |
* We also require super-user privilege for |
* the option. |
* the option. |
* See the comments on IN6_HOPOPTS. |
* See the comments on IN6_HOPOPTS. |
*/ |
*/ |
if (!privileged) |
if (!privileged) |
break; |
break; |
|
|
*mp = sbcreatecontrol((caddr_t)ip6e, elen, |
*mp = sbcreatecontrol((caddr_t)ip6e, elen, |
IPV6_DSTOPTS, |
IPV6_DSTOPTS, |
IPPROTO_IPV6); |
IPPROTO_IPV6); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
break; |
break; |
|
|
case IPPROTO_ROUTING: |
case IPPROTO_ROUTING: |
if (!in6p->in6p_flags & IN6P_RTHDR) |
if (!in6p->in6p_flags & IN6P_RTHDR) |
break; |
break; |
|
|
*mp = sbcreatecontrol((caddr_t)ip6e, elen, |
*mp = sbcreatecontrol((caddr_t)ip6e, elen, |
IPV6_RTHDR, |
IPV6_RTHDR, |
IPPROTO_IPV6); |
IPPROTO_IPV6); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
break; |
break; |
|
|
case IPPROTO_UDP: |
case IPPROTO_UDP: |
case IPPROTO_TCP: |
case IPPROTO_TCP: |
case IPPROTO_ICMPV6: |
case IPPROTO_ICMPV6: |
default: |
default: |
/* |
/* |
* stop search if we encounter an upper |
* stop search if we encounter an upper |
* layer protocol headers. |
* layer protocol headers. |
*/ |
*/ |
goto loopend; |
goto loopend; |
|
|
case IPPROTO_HOPOPTS: |
case IPPROTO_HOPOPTS: |
case IPPROTO_AH: /* is it possible? */ |
case IPPROTO_AH: /* is it possible? */ |
break; |
break; |
} |
} |
|
|
/* proceed with the next header. */ |
/* proceed with the next header. */ |
Line 1176 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1206 ip6_savecontrol(in6p, mp, ip6, m) |
|
nxt = ip6e->ip6e_nxt; |
nxt = ip6e->ip6e_nxt; |
} |
} |
loopend: |
loopend: |
|
; |
} |
} |
if ((in6p->in6p_flags & IN6P_HOPOPTS) && privileged) { |
if ((in6p->in6p_flags & IN6P_HOPOPTS) && privileged) { |
/* to be done */ |
/* to be done */ |
Line 1217 ip6_get_prevhdr(m, off) |
|
Line 1248 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 1275 ip6_nexthdr(m, off, proto, nxtp) |
|
Line 1306 ip6_nexthdr(m, off, proto, nxtp) |
|
if (m->m_pkthdr.len < off + sizeof(fh)) |
if (m->m_pkthdr.len < off + sizeof(fh)) |
return -1; |
return -1; |
m_copydata(m, off, sizeof(fh), (caddr_t)&fh); |
m_copydata(m, off, sizeof(fh), (caddr_t)&fh); |
if ((fh.ip6f_offlg & IP6F_OFF_MASK) != 0) |
if ((ntohs(fh.ip6f_offlg) & IP6F_OFF_MASK) != 0) |
return -1; |
return -1; |
if (nxtp) |
if (nxtp) |
*nxtp = fh.ip6f_nxt; |
*nxtp = fh.ip6f_nxt; |
Line 1289 ip6_nexthdr(m, off, proto, nxtp) |
|
Line 1320 ip6_nexthdr(m, off, proto, nxtp) |
|
if (nxtp) |
if (nxtp) |
*nxtp = ip6e.ip6e_nxt; |
*nxtp = ip6e.ip6e_nxt; |
off += (ip6e.ip6e_len + 2) << 2; |
off += (ip6e.ip6e_len + 2) << 2; |
|
if (m->m_pkthdr.len < off) |
|
return -1; |
return off; |
return off; |
|
|
case IPPROTO_HOPOPTS: |
case IPPROTO_HOPOPTS: |
Line 1300 ip6_nexthdr(m, off, proto, nxtp) |
|
Line 1333 ip6_nexthdr(m, off, proto, nxtp) |
|
if (nxtp) |
if (nxtp) |
*nxtp = ip6e.ip6e_nxt; |
*nxtp = ip6e.ip6e_nxt; |
off += (ip6e.ip6e_len + 1) << 3; |
off += (ip6e.ip6e_len + 1) << 3; |
|
if (m->m_pkthdr.len < off) |
|
return -1; |
return off; |
return off; |
|
|
case IPPROTO_NONE: |
case IPPROTO_NONE: |
Line 1359 u_char inet6ctlerrmap[PRC_NCMDS] = { |
|
Line 1394 u_char inet6ctlerrmap[PRC_NCMDS] = { |
|
ENOPROTOOPT |
ENOPROTOOPT |
}; |
}; |
|
|
#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 1409 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1441 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: |
case IPV6CTL_USE_DEPRECATED: |
Line 1419 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1453 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
&ip6_use_deprecated); |
&ip6_use_deprecated); |
case IPV6CTL_RR_PRUNE: |
case IPV6CTL_RR_PRUNE: |
return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_rr_prune); |
return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_rr_prune); |
#ifndef INET6_BINDV6ONLY |
case IPV6CTL_V6ONLY: |
case IPV6CTL_BINDV6ONLY: |
#ifdef INET6_BINDV6ONLY |
return sysctl_int(oldp, oldlenp, newp, newlen, |
return sysctl_rdint(oldp, oldlenp, newp, ip6_v6only); |
&ip6_bindv6only); |
#else |
|
return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_v6only); |
#endif |
#endif |
case IPV6CTL_ANONPORTMIN: |
case IPV6CTL_ANONPORTMIN: |
old = ip6_anonportmin; |
old = ip6_anonportmin; |
Line 1476 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1511 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
} |
} |
return (error); |
return (error); |
#endif |
#endif |
|
case IPV6CTL_MAXFRAGS: |
|
return sysctl_int(oldp, oldlenp, newp, newlen, &ip6_maxfrags); |
default: |
default: |
return EOPNOTSUPP; |
return EOPNOTSUPP; |
} |
} |