version 1.30, 2000/12/14 17:36:45 |
version 1.63, 2003/05/14 14:41:33 |
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/* $NetBSD$ */ |
/* $NetBSD$ */ |
/* $KAME: ip6_input.c,v 1.121 2000/08/31 06:07:29 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 <netinet/icmp6.h> |
#include <netinet/icmp6.h> |
#include <netinet6/in6_ifattach.h> |
#include <netinet6/in6_ifattach.h> |
#include <netinet6/nd6.h> |
#include <netinet6/nd6.h> |
#include <netinet6/in6_prefix.h> |
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#ifdef IPV6FIREWALL |
#ifdef IPSEC |
#include <netinet6/ip6_fw.h> |
#include <netinet6/ipsec.h> |
#endif |
#endif |
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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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#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 134 int ip6_forward_srcrt; /* XXX */ |
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Line 140 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 |
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/* firewall hooks */ |
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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 |
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#ifdef PFIL_HOOKS |
#ifdef PFIL_HOOKS |
struct pfil_head inet6_pfil_hook; |
struct pfil_head inet6_pfil_hook; |
#endif |
#endif |
Line 149 struct ip6stat ip6stat; |
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Line 149 struct ip6stat ip6stat; |
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static void ip6_init2 __P((void *)); |
static void ip6_init2 __P((void *)); |
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static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *)); |
static int ip6_hopopts_input __P((u_int32_t *, u_int32_t *, struct mbuf **, int *)); |
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static struct mbuf *ip6_pullexthdr __P((struct mbuf *, size_t, int)); |
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/* |
/* |
* IP6 initialization: fill in IP6 protocol switch table. |
* IP6 initialization: fill in IP6 protocol switch table. |
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 |
#ifdef PFIL_HOOKS |
/* Register our Packet Filter hook. */ |
/* Register our Packet Filter hook. */ |
inet6_pfil_hook.ph_key = (void *)(u_long) AF_INET6; |
inet6_pfil_hook.ph_type = PFIL_TYPE_AF; |
inet6_pfil_hook.ph_dlt = DLT_RAW; |
inet6_pfil_hook.ph_af = AF_INET6; |
i = pfil_head_register(&inet6_pfil_hook); |
i = pfil_head_register(&inet6_pfil_hook); |
if (i != 0) |
if (i != 0) |
printf("ip6_init: WARNING: unable to register pfil hook, " |
printf("ip6_init: WARNING: unable to register pfil hook, " |
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ip6_init2(dummy) |
ip6_init2(dummy) |
void *dummy; |
void *dummy; |
{ |
{ |
/* |
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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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in6_ifattach(&loif[0], NULL); |
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/* nd6_timer_init */ |
/* nd6_timer_init */ |
callout_init(&nd6_timer_ch); |
callout_init(&nd6_timer_ch); |
callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL); |
callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL); |
/* router renumbering prefix list maintenance */ |
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callout_init(&in6_rr_timer_ch); |
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callout_reset(&in6_rr_timer_ch, hz, in6_rr_timer, NULL); |
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} |
} |
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/* |
/* |
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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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* 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); |
ip6stat.ip6s_total++; |
ip6stat.ip6s_total++; |
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#ifndef PULLDOWN_TEST |
/* |
/* XXX is the line really necessary? */ |
* If the IPv6 header is not aligned, slurp it up into a new |
IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), /*nothing*/); |
* mbuf with space for link headers, in the event we forward |
#endif |
* 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. |
if (m->m_len < sizeof(struct ip6_hdr)) { |
*/ |
struct ifnet *inifp; |
if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) { |
inifp = m->m_pkthdr.rcvif; |
struct ifnet *inifp = m->m_pkthdr.rcvif; |
if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == 0) { |
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) { |
ip6stat.ip6s_toosmall++; |
ip6stat.ip6s_toosmall++; |
in6_ifstat_inc(inifp, ifs6_in_hdrerr); |
in6_ifstat_inc(inifp, ifs6_in_hdrerr); |
return; |
return; |
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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. |
*/ |
*/ |
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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#endif /* PFIL_HOOKS */ |
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ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; |
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#ifdef IPV6FIREWALL |
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/* |
/* |
* Check with the firewall... |
* let ipfilter look at packet on the wire, |
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* not the decapsulated packet. |
*/ |
*/ |
if (ip6_fw_chk_ptr) { |
#ifdef IPSEC |
u_short port = 0; |
if (!ipsec_getnhist(m)) |
/* If ipfw says divert, we have to just drop packet */ |
#else |
/* use port as a dummy argument */ |
if (1) |
if ((*ip6_fw_chk_ptr)(&ip6, NULL, &port, &m)) { |
#endif |
m_freem(m); |
{ |
m = NULL; |
if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif, |
} |
PFIL_IN) != 0) |
if (!m) |
return; |
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if (m == NULL) |
return; |
return; |
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ip6 = mtod(m, struct ip6_hdr *); |
} |
} |
#endif |
#endif /* PFIL_HOOKS */ |
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ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; |
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#ifdef ALTQ |
#ifdef ALTQ |
/* XXX Temporary until ALTQ is changed to use a pfil hook */ |
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if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) { |
if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) { |
/* packet is dropped by traffic conditioner */ |
/* packet is dropped by traffic conditioner */ |
return; |
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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/* |
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* XXX: "badscope" is not very suitable for a multicast source. |
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*/ |
ip6stat.ip6s_badscope++; |
ip6stat.ip6s_badscope++; |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
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) { |
|
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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|
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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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/* |
/* |
|
|
* Unicast check |
* Unicast check |
*/ |
*/ |
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)) |
ip6stat.ip6s_forward_cachehit++; |
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++; |
ip6stat.ip6s_forward_cachemiss++; |
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} |
} |
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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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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 && |
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!(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 |
#endif |
ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) { |
ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) { |
struct in6_ifaddr *ia6 = |
struct in6_ifaddr *ia6 = |
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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\n", |
"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))); |
|
|
goto bad; |
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*/ |
deliverifp = ip6_forward_rt.ro_rt->rt_ifp; /* faith */ |
goto hbhcheck; |
goto hbhcheck; |
} |
} |
} |
} |
|
|
ip6 = mtod(m, struct ip6_hdr *); |
ip6 = mtod(m, struct ip6_hdr *); |
|
|
/* |
/* |
* 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. |
*/ |
*/ |
|
|
/* |
/* |
* Note that if a valid jumbo payload option is |
* Note that if a valid jumbo payload option is |
* contained, ip6_hoptops_input() must set a valid |
* contained, ip6_hoptops_input() must set a valid |
* (non-zero) payload length to the variable plen. |
* (non-zero) payload length to the variable plen. |
*/ |
*/ |
ip6stat.ip6s_badoptions++; |
ip6stat.ip6s_badoptions++; |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_discard); |
|
|
(caddr_t)&ip6->ip6_plen - (caddr_t)ip6); |
(caddr_t)&ip6->ip6_plen - (caddr_t)ip6); |
return; |
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), |
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, sizeof(struct ip6_hdr), |
sizeof(struct ip6_hbh)); |
sizeof(struct ip6_hbh)); |
if (hbh == NULL) { |
if (hbh == NULL) { |
ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
return; |
return; |
} |
} |
#endif |
KASSERT(IP6_HDR_ALIGNED_P(hbh)); |
nxt = hbh->ip6h_nxt; |
nxt = hbh->ip6h_nxt; |
|
|
/* |
/* |
|
|
} else if (!ours) { |
} else if (!ours) { |
ip6_forward(m, 0); |
ip6_forward(m, 0); |
return; |
return; |
} |
} |
|
|
ip6 = mtod(m, struct ip6_hdr *); |
ip6 = mtod(m, struct ip6_hdr *); |
|
|
|
|
ip6stat.ip6s_delivered++; |
ip6stat.ip6s_delivered++; |
in6_ifstat_inc(deliverifp, ifs6_in_deliver); |
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; |
} |
} |
|
|
|
#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 742 ip6_hopopts_input(plenp, rtalertp, mp, o |
|
Line 767 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); |
|
hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off); |
|
hbhlen = (hbh->ip6h_len + 1) << 3; |
|
|
|
IP6_EXTHDR_CHECK(m, off, hbhlen, -1); |
|
hbh = (struct ip6_hbh *)(mtod(m, caddr_t) + off); |
|
#else |
|
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, |
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, |
sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); |
sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); |
if (hbh == NULL) { |
if (hbh == NULL) { |
Line 769 ip6_hopopts_input(plenp, rtalertp, mp, o |
|
Line 786 ip6_hopopts_input(plenp, rtalertp, mp, o |
|
ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
return -1; |
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); |
|
|
if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh), |
if (ip6_process_hopopts(m, (u_int8_t *)hbh + sizeof(struct ip6_hbh), |
hbhlen, rtalertp, plenp) < 0) |
hbhlen, rtalertp, plenp) < 0) |
return(-1); |
return (-1); |
|
|
*offp = off; |
*offp = off; |
*mp = m; |
*mp = m; |
return(0); |
return (0); |
} |
} |
|
|
/* |
/* |
Line 788 ip6_hopopts_input(plenp, rtalertp, mp, o |
|
Line 805 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 802 ip6_process_hopopts(m, opthead, hbhlen, |
|
Line 823 ip6_process_hopopts(m, opthead, hbhlen, |
|
u_int8_t *opt = opthead; |
u_int8_t *opt = opthead; |
u_int16_t rtalert_val; |
u_int16_t rtalert_val; |
u_int32_t jumboplen; |
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: |
/* XXX may need check for alignment */ |
/* XXX may need check for alignment */ |
if (hbhlen < IP6OPT_RTALERT_LEN) { |
if (hbhlen < IP6OPT_RTALERT_LEN) { |
ip6stat.ip6s_toosmall++; |
ip6stat.ip6s_toosmall++; |
goto bad; |
goto bad; |
} |
} |
if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) |
if (*(opt + 1) != IP6OPT_RTALERT_LEN - 2) { |
/* XXX: should we discard the packet? */ |
/* XXX stat */ |
log(LOG_ERR, "length of router alert opt is inconsitent(%d)", |
icmp6_error(m, ICMP6_PARAM_PROB, |
*(opt + 1)); |
ICMP6_PARAMPROB_HEADER, |
optlen = IP6OPT_RTALERT_LEN; |
erroff + opt + 1 - opthead); |
bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2); |
return (-1); |
*rtalertp = ntohs(rtalert_val); |
} |
break; |
optlen = IP6OPT_RTALERT_LEN; |
case IP6OPT_JUMBO: |
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_JUMBO_LEN) { |
ip6stat.ip6s_toosmall++; |
ip6stat.ip6s_toosmall++; |
goto bad; |
goto bad; |
} |
} |
if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) |
if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) { |
/* XXX: should we discard the packet? */ |
/* XXX stat */ |
log(LOG_ERR, "length of jumbopayload opt " |
icmp6_error(m, ICMP6_PARAM_PROB, |
"is inconsistent(%d)\n", |
ICMP6_PARAMPROB_HEADER, |
*(opt + 1)); |
erroff + opt + 1 - opthead); |
|
return (-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) { |
ip6stat.ip6s_badoptions++; |
ip6stat.ip6s_badoptions++; |
icmp6_error(m, ICMP6_PARAM_PROB, |
icmp6_error(m, ICMP6_PARAM_PROB, |
ICMP6_PARAMPROB_HEADER, |
ICMP6_PARAMPROB_HEADER, |
sizeof(struct ip6_hdr) + |
erroff + opt - opthead); |
sizeof(struct ip6_hbh) + |
return (-1); |
opt - opthead); |
|
return(-1); |
|
} |
} |
|
|
/* |
/* |
Line 876 ip6_process_hopopts(m, opthead, hbhlen, |
|
Line 901 ip6_process_hopopts(m, opthead, hbhlen, |
|
if (*plenp != 0) { |
if (*plenp != 0) { |
ip6stat.ip6s_badoptions++; |
ip6stat.ip6s_badoptions++; |
icmp6_error(m, ICMP6_PARAM_PROB, |
icmp6_error(m, ICMP6_PARAM_PROB, |
ICMP6_PARAMPROB_HEADER, |
ICMP6_PARAMPROB_HEADER, |
sizeof(struct ip6_hdr) + |
erroff + opt + 2 - opthead); |
sizeof(struct ip6_hbh) + |
return (-1); |
opt + 2 - opthead); |
|
return(-1); |
|
} |
} |
#endif |
#endif |
|
|
Line 890 ip6_process_hopopts(m, opthead, hbhlen, |
|
Line 913 ip6_process_hopopts(m, opthead, hbhlen, |
|
if (jumboplen <= IPV6_MAXPACKET) { |
if (jumboplen <= IPV6_MAXPACKET) { |
ip6stat.ip6s_badoptions++; |
ip6stat.ip6s_badoptions++; |
icmp6_error(m, ICMP6_PARAM_PROB, |
icmp6_error(m, ICMP6_PARAM_PROB, |
ICMP6_PARAMPROB_HEADER, |
ICMP6_PARAMPROB_HEADER, |
sizeof(struct ip6_hdr) + |
erroff + opt + 2 - opthead); |
sizeof(struct ip6_hbh) + |
return (-1); |
opt + 2 - opthead); |
|
return(-1); |
|
} |
} |
*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, |
optlen = ip6_unknown_opt(opt, m, |
sizeof(struct ip6_hdr) + |
erroff + opt - opthead); |
sizeof(struct ip6_hbh) + |
if (optlen == -1) |
opt - opthead)) == -1) |
return (-1); |
return(-1); |
optlen += 2; |
optlen += 2; |
break; |
break; |
|
} |
} |
} |
} |
|
|
return(0); |
return (0); |
|
|
bad: |
bad: |
m_freem(m); |
m_freem(m); |
return(-1); |
return (-1); |
} |
} |
|
|
/* |
/* |
Line 935 ip6_unknown_opt(optp, m, off) |
|
Line 955 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 */ |
return(-1); |
return (-1); |
} |
} |
|
|
/* |
/* |
Line 974 ip6_unknown_opt(optp, m, off) |
|
Line 994 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 992 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1012 ip6_savecontrol(in6p, mp, ip6, m) |
|
|
|
microtime(&tv); |
microtime(&tv); |
*mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv), |
*mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv), |
SCM_TIMESTAMP, SOL_SOCKET); |
SCM_TIMESTAMP, SOL_SOCKET); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
#endif |
#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, IPPROTO_IPV6); |
IPPROTO_IPV6); |
|
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
Line 1015 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1034 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 1024 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1043 ip6_savecontrol(in6p, mp, ip6, m) |
|
? m->m_pkthdr.rcvif->if_index |
? m->m_pkthdr.rcvif->if_index |
: 0; |
: 0; |
*mp = sbcreatecontrol((caddr_t) &pi6, |
*mp = sbcreatecontrol((caddr_t) &pi6, |
sizeof(struct in6_pktinfo), IPV6_PKTINFO, |
sizeof(struct in6_pktinfo), IPV6_PKTINFO, IPPROTO_IPV6); |
IPPROTO_IPV6); |
|
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
if (in6p->in6p_flags & IN6P_HOPLIMIT) { |
if (in6p->in6p_flags & IN6P_HOPLIMIT) { |
int hlim = ip6->ip6_hlim & 0xff; |
int hlim = ip6->ip6_hlim & 0xff; |
*mp = sbcreatecontrol((caddr_t) &hlim, |
*mp = sbcreatecontrol((caddr_t) &hlim, sizeof(int), |
sizeof(int), IPV6_HOPLIMIT, IPPROTO_IPV6); |
IPV6_HOPLIMIT, IPPROTO_IPV6); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
} |
} |
Line 1044 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1062 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 1056 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1074 ip6_savecontrol(in6p, mp, ip6, m) |
|
if (ip6->ip6_nxt == IPPROTO_HOPOPTS) { |
if (ip6->ip6_nxt == IPPROTO_HOPOPTS) { |
struct ip6_hbh *hbh; |
struct ip6_hbh *hbh; |
int hbhlen; |
int hbhlen; |
|
struct mbuf *ext; |
|
|
#ifndef PULLDOWN_TEST |
ext = ip6_pullexthdr(m, sizeof(struct ip6_hdr), |
hbh = (struct ip6_hbh *)(ip6 + 1); |
ip6->ip6_nxt); |
hbhlen = (hbh->ip6h_len + 1) << 3; |
if (ext == NULL) { |
#else |
|
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, |
|
sizeof(struct ip6_hdr), sizeof(struct ip6_hbh)); |
|
if (hbh == NULL) { |
|
ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
return; |
return; |
} |
} |
|
hbh = mtod(ext, struct ip6_hbh *); |
hbhlen = (hbh->ip6h_len + 1) << 3; |
hbhlen = (hbh->ip6h_len + 1) << 3; |
IP6_EXTHDR_GET(hbh, struct ip6_hbh *, m, |
if (hbhlen != ext->m_len) { |
sizeof(struct ip6_hdr), hbhlen); |
m_freem(ext); |
if (hbh == NULL) { |
|
ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
return; |
return; |
} |
} |
#endif |
|
|
|
/* |
/* |
* XXX: We copy whole the header even if a jumbo |
* XXX: We copy whole the header even if a jumbo |
Line 1083 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1097 ip6_savecontrol(in6p, mp, ip6, m) |
|
* But it's too painful operation... |
* But it's too painful operation... |
*/ |
*/ |
*mp = sbcreatecontrol((caddr_t)hbh, hbhlen, |
*mp = sbcreatecontrol((caddr_t)hbh, hbhlen, |
IPV6_HOPOPTS, IPPROTO_IPV6); |
IPV6_HOPOPTS, IPPROTO_IPV6); |
if (*mp) |
if (*mp) |
mp = &(*mp)->m_next; |
mp = &(*mp)->m_next; |
|
m_freem(ext); |
} |
} |
} |
} |
|
|
/* IPV6_DSTOPTS and IPV6_RTHDR socket options */ |
/* IPV6_DSTOPTS and IPV6_RTHDR socket options */ |
if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) { |
if (in6p->in6p_flags & (IN6P_DSTOPTS | IN6P_RTHDR)) { |
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); |
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); |
int nxt = ip6->ip6_nxt, off = sizeof(struct ip6_hdr);; |
int nxt = ip6->ip6_nxt, off = sizeof(struct ip6_hdr); |
|
|
/* |
/* |
* Search for destination options headers or routing |
* Search for destination options headers or routing |
Line 1101 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1116 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 = NULL; |
int elen; |
int elen; |
|
struct mbuf *ext = NULL; |
|
|
#ifndef PULLDOWN_TEST |
/* |
ip6e = (struct ip6_ext *)(mtod(m, caddr_t) + off); |
* if it is not an extension header, don't try to |
if (nxt == IPPROTO_AH) |
* pull it from the chain. |
elen = (ip6e->ip6e_len + 2) << 2; |
*/ |
else |
switch (nxt) { |
elen = (ip6e->ip6e_len + 1) << 3; |
case IPPROTO_DSTOPTS: |
#else |
case IPPROTO_ROUTING: |
IP6_EXTHDR_GET(ip6e, struct ip6_ext *, m, off, |
case IPPROTO_HOPOPTS: |
sizeof(struct ip6_ext)); |
case IPPROTO_AH: /* is it possible? */ |
if (ip6e == NULL) { |
break; |
|
default: |
|
goto loopend; |
|
} |
|
|
|
ext = ip6_pullexthdr(m, off, nxt); |
|
if (ext == NULL) { |
ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
return; |
return; |
} |
} |
|
ip6e = mtod(ext, struct ip6_ext *); |
if (nxt == IPPROTO_AH) |
if (nxt == IPPROTO_AH) |
elen = (ip6e->ip6e_len + 2) << 2; |
elen = (ip6e->ip6e_len + 2) << 2; |
else |
else |
elen = (ip6e->ip6e_len + 1) << 3; |
elen = (ip6e->ip6e_len + 1) << 3; |
IP6_EXTHDR_GET(ip6e, struct ip6_ext *, m, off, elen); |
if (elen != ext->m_len) { |
if (ip6e == NULL) { |
m_freem(ext); |
ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
return; |
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_HOPOPTS: |
|
case IPPROTO_AH: /* is it possible? */ |
|
break; |
|
|
|
default: |
|
/* |
|
* other cases have been filtered in the above. |
|
* none will visit this case. here we supply |
|
* the code just in case (nxt overwritten or |
|
* other cases). |
|
*/ |
|
m_freem(ext); |
|
goto loopend; |
|
|
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. */ |
/* proceed with the next header. */ |
off += elen; |
off += elen; |
nxt = ip6e->ip6e_nxt; |
nxt = ip6e->ip6e_nxt; |
|
ip6e = NULL; |
|
m_freem(ext); |
|
ext = NULL; |
} |
} |
loopend: |
loopend: |
|
; |
|
} |
|
} |
|
|
|
/* |
|
* pull single extension header from mbuf chain. returns single mbuf that |
|
* contains the result, or NULL on error. |
|
*/ |
|
static struct mbuf * |
|
ip6_pullexthdr(m, off, nxt) |
|
struct mbuf *m; |
|
size_t off; |
|
int nxt; |
|
{ |
|
struct ip6_ext ip6e; |
|
size_t elen; |
|
struct mbuf *n; |
|
|
|
#ifdef DIAGNOSTIC |
|
switch (nxt) { |
|
case IPPROTO_DSTOPTS: |
|
case IPPROTO_ROUTING: |
|
case IPPROTO_HOPOPTS: |
|
case IPPROTO_AH: /* is it possible? */ |
|
break; |
|
default: |
|
printf("ip6_pullexthdr: invalid nxt=%d\n", nxt); |
} |
} |
if ((in6p->in6p_flags & IN6P_HOPOPTS) && privileged) { |
#endif |
/* to be done */ |
|
|
m_copydata(m, off, sizeof(ip6e), (caddr_t)&ip6e); |
|
if (nxt == IPPROTO_AH) |
|
elen = (ip6e.ip6e_len + 2) << 2; |
|
else |
|
elen = (ip6e.ip6e_len + 1) << 3; |
|
|
|
MGET(n, M_DONTWAIT, MT_DATA); |
|
if (n && elen >= MLEN) { |
|
MCLGET(n, M_DONTWAIT); |
|
if ((n->m_flags & M_EXT) == 0) { |
|
m_free(n); |
|
n = NULL; |
|
} |
} |
} |
if ((in6p->in6p_flags & IN6P_DSTOPTS) && privileged) { |
if (!n) |
/* to be done */ |
return NULL; |
|
|
|
n->m_len = 0; |
|
if (elen >= M_TRAILINGSPACE(n)) { |
|
m_free(n); |
|
return NULL; |
} |
} |
/* IN6P_RTHDR - to be done */ |
|
|
|
|
m_copydata(m, off, elen, mtod(n, caddr_t)); |
|
n->m_len = elen; |
|
return n; |
} |
} |
|
|
/* |
/* |
Line 1203 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1275 ip6_savecontrol(in6p, mp, ip6, m) |
|
* carefully. Moreover, it will not be used in the near future when |
* carefully. Moreover, it will not be used in the near future when |
* we develop `neater' mechanism to process extension headers. |
* we develop `neater' mechanism to process extension headers. |
*/ |
*/ |
char * |
u_int8_t * |
ip6_get_prevhdr(m, off) |
ip6_get_prevhdr(m, off) |
struct mbuf *m; |
struct mbuf *m; |
int off; |
int off; |
Line 1211 ip6_get_prevhdr(m, off) |
|
Line 1283 ip6_get_prevhdr(m, off) |
|
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); |
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *); |
|
|
if (off == sizeof(struct ip6_hdr)) |
if (off == sizeof(struct ip6_hdr)) |
return(&ip6->ip6_nxt); |
return (&ip6->ip6_nxt); |
else { |
else { |
int len, nxt; |
int len, nxt; |
struct ip6_ext *ip6e = NULL; |
struct ip6_ext *ip6e = NULL; |
Line 1221 ip6_get_prevhdr(m, off) |
|
Line 1293 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 1235 ip6_get_prevhdr(m, off) |
|
Line 1307 ip6_get_prevhdr(m, off) |
|
nxt = ip6e->ip6e_nxt; |
nxt = ip6e->ip6e_nxt; |
} |
} |
if (ip6e) |
if (ip6e) |
return(&ip6e->ip6e_nxt); |
return (&ip6e->ip6e_nxt); |
else |
else |
return NULL; |
return NULL; |
} |
} |
Line 1293 ip6_nexthdr(m, off, proto, nxtp) |
|
Line 1365 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 1304 ip6_nexthdr(m, off, proto, nxtp) |
|
Line 1378 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 1315 ip6_nexthdr(m, off, proto, nxtp) |
|
Line 1391 ip6_nexthdr(m, off, proto, nxtp) |
|
default: |
default: |
return -1; |
return -1; |
} |
} |
|
|
return -1; |
|
} |
} |
|
|
/* |
/* |
Line 1363 u_char inet6ctlerrmap[PRC_NCMDS] = { |
|
Line 1437 u_char inet6ctlerrmap[PRC_NCMDS] = { |
|
ENOPROTOOPT |
ENOPROTOOPT |
}; |
}; |
|
|
#include <uvm/uvm_extern.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 1413 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1484 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 1423 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1496 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 1480 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1554 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; |
} |
} |