| version 1.8, 1999/10/01 10:15:16 |
version 1.8.2.5, 2001/03/12 13:31:55 |
|
|
| /* $NetBSD$ */ |
/* $NetBSD$ */ |
| |
/* $KAME: ip6_input.c,v 1.183 2001/03/01 15:15:23 itojun Exp $ */ |
| |
|
| /* |
/* |
| * 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: |
|
|
| * 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 |
|
|
| * @(#)ip_input.c 8.2 (Berkeley) 1/4/94 |
* @(#)ip_input.c 8.2 (Berkeley) 1/4/94 |
| */ |
*/ |
| |
|
| #ifdef __FreeBSD__ |
|
| #include "opt_ip6fw.h" |
|
| #endif |
|
| #if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__) |
|
| #include "opt_inet.h" |
#include "opt_inet.h" |
| #ifdef __NetBSD__ /*XXX*/ |
|
| #include "opt_ipsec.h" |
#include "opt_ipsec.h" |
| #endif |
#include "opt_pfil_hooks.h" |
| #endif |
|
| |
|
| #include <sys/param.h> |
#include <sys/param.h> |
| #include <sys/systm.h> |
#include <sys/systm.h> |
|
|
| #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__ |
|
| #include <sys/proc.h> |
#include <sys/proc.h> |
| #endif |
|
| |
|
| #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> |
| |
#ifdef PFIL_HOOKS |
| |
#include <net/pfil.h> |
| |
#endif |
| |
|
| #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> |
|
| #if !defined(__FreeBSD__) || __FreeBSD__ < 3 |
|
| #include <netinet6/in6_pcb.h> |
|
| #else |
|
| #include <netinet/in_pcb.h> |
|
| #endif |
|
| #include <netinet6/ip6_var.h> |
|
| #include <netinet6/icmp6.h> |
|
| #include <netinet6/in6_ifattach.h> |
|
| #include <netinet6/nd6.h> |
|
| |
|
| #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 <netinet6/in6_var.h> |
| |
#include <netinet6/ip6_var.h> |
| |
#include <netinet6/in6_pcb.h> |
| |
#include <netinet/icmp6.h> |
| |
#include <netinet6/in6_ifattach.h> |
| |
#include <netinet6/nd6.h> |
| |
#include <netinet6/in6_prefix.h> |
| |
|
| |
#ifdef IPSEC |
| |
#include <netinet6/ipsec.h> |
| |
#endif |
| |
|
| #include <netinet6/ip6protosw.h> |
#include <netinet6/ip6protosw.h> |
| |
|
|
|
| #include "gif.h" |
#include "gif.h" |
| #include "bpfilter.h" |
#include "bpfilter.h" |
| |
|
| |
#include <net/net_osdep.h> |
| |
|
| extern struct domain inet6domain; |
extern struct domain inet6domain; |
| extern struct ip6protosw inet6sw[]; |
|
| #ifdef __bsdi__ |
|
| extern struct ifnet loif; |
|
| #endif |
|
| |
|
| 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; |
| |
|
| #ifdef __NetBSD__ |
|
| 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 */ |
| |
|
| |
#ifdef PFIL_HOOKS |
| |
struct pfil_head inet6_pfil_hook; |
| #endif |
#endif |
| |
|
| struct ip6stat ip6stat; |
struct ip6stat ip6stat; |
| Line 155 static int ip6_hopopts_input __P((u_int3 |
|
| Line 151 static int ip6_hopopts_input __P((u_int3 |
|
| void |
void |
| ip6_init() |
ip6_init() |
| { |
{ |
| register struct ip6protosw *pr; |
struct ip6protosw *pr; |
| register int i; |
int i; |
| struct timeval tv; |
struct timeval tv; |
| |
|
| pr = (struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW); |
pr = (struct ip6protosw *)pffindproto(PF_INET6, IPPROTO_RAW, SOCK_RAW); |
|
|
| ip6_flow_seq = random() ^ tv.tv_usec; |
ip6_flow_seq = random() ^ tv.tv_usec; |
| |
|
| ip6_init2((void *)0); |
ip6_init2((void *)0); |
| |
|
| |
#ifdef PFIL_HOOKS |
| |
/* Register our Packet Filter hook. */ |
| |
inet6_pfil_hook.ph_type = PFIL_TYPE_AF; |
| |
inet6_pfil_hook.ph_af = AF_INET6; |
| |
i = pfil_head_register(&inet6_pfil_hook); |
| |
if (i != 0) |
| |
printf("ip6_init: WARNING: unable to register pfil hook, " |
| |
"error %d\n", i); |
| |
#endif /* PFIL_HOOKS */ |
| } |
} |
| |
|
| static void |
static void |
| ip6_init2(dummy) |
ip6_init2(dummy) |
| void *dummy; |
void *dummy; |
| { |
{ |
| int i; |
|
| |
|
| /* |
/* |
| * to route local address of p2p link to loopback, |
* to route local address of p2p link to loopback, |
| * assign loopback address first. |
* assign loopback address first. |
| */ |
*/ |
| for (i = 0; i < NLOOP; i++) |
in6_ifattach(&loif[0], NULL); |
| in6_ifattach(&loif[i], IN6_IFT_LOOP, NULL, 0); |
|
| |
|
| /* get EUI64 from somewhere, attach pseudo interfaces */ |
|
| if (in6_ifattach_getifid(NULL) == 0) |
|
| in6_ifattach_p2p(); |
|
| |
|
| /* nd6_timer_init */ |
/* nd6_timer_init */ |
| timeout(nd6_timer, (caddr_t)0, hz); |
callout_init(&nd6_timer_ch); |
| |
callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL); |
| |
/* router renumbering prefix list maintenance */ |
| |
callout_init(&in6_rr_timer_ch); |
| |
callout_reset(&in6_rr_timer_ch, hz, in6_rr_timer, NULL); |
| } |
} |
| |
|
| #ifdef __FreeBSD__ |
|
| /* cheat */ |
|
| SYSINIT(netinet6init2, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, ip6_init2, NULL); |
|
| #endif |
|
| |
|
| /* |
/* |
| * IP6 input interrupt handling. Just pass the packet to ip6_input. |
* IP6 input interrupt handling. Just pass the packet to ip6_input. |
| */ |
*/ |
|
|
| } |
} |
| } |
} |
| |
|
| #ifdef __FreeBSD__ |
|
| NETISR_SET(NETISR_IPV6, ip6intr); |
|
| #endif |
|
| |
|
| extern struct route_in6 ip6_forward_rt; |
extern struct route_in6 ip6_forward_rt; |
| |
|
| 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; |
| |
struct ifnet *deliverifp = NULL; |
| |
|
| #ifdef IPSEC |
#ifdef IPSEC |
| /* |
/* |
|
|
| m->m_flags &= ~M_AUTHIPDGM; |
m->m_flags &= ~M_AUTHIPDGM; |
| } |
} |
| #endif |
#endif |
| |
|
| /* |
/* |
| * mbuf statistics by kazu |
* mbuf statistics by kazu |
| */ |
*/ |
|
|
| ip6stat.ip6s_mext1++; |
ip6stat.ip6s_mext1++; |
| } else { |
} else { |
| 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 <= 31) |
| 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]++; |
|
|
| ip6stat.ip6s_m1++; |
ip6stat.ip6s_m1++; |
| } |
} |
| |
|
| IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr), /*nothing*/); |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_receive); |
| |
|
| ip6stat.ip6s_total++; |
ip6stat.ip6s_total++; |
| |
|
| 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 |
| |
|
| |
if (m->m_len < sizeof(struct ip6_hdr)) { |
| |
struct ifnet *inifp; |
| |
inifp = m->m_pkthdr.rcvif; |
| |
if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == 0) { |
| |
ip6stat.ip6s_toosmall++; |
| |
in6_ifstat_inc(inifp, ifs6_in_hdrerr); |
| |
return; |
| |
} |
| } |
} |
| |
|
| ip6 = mtod(m, struct ip6_hdr *); |
ip6 = mtod(m, struct ip6_hdr *); |
| |
|
| if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { |
if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) { |
| ip6stat.ip6s_badvers++; |
ip6stat.ip6s_badvers++; |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr); |
| goto bad; |
goto bad; |
| } |
} |
| |
|
| |
#ifdef PFIL_HOOKS |
| |
/* |
| |
* Run through list of hooks for input packets. If there are any |
| |
* filters which require that additional packets in the flow are |
| |
* not fast-forwarded, they must clear the M_CANFASTFWD flag. |
| |
* Note that filters must _never_ set this flag, as another filter |
| |
* in the list may have previously cleared it. |
| |
*/ |
| |
if (pfil_run_hooks(&inet6_pfil_hook, &m, m->m_pkthdr.rcvif, |
| |
PFIL_IN) != 0) |
| |
return; |
| |
if (m == NULL) |
| |
return; |
| |
ip6 = mtod(m, struct ip6_hdr *); |
| |
#endif /* PFIL_HOOKS */ |
| |
|
| |
|
| ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; |
ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; |
| |
|
| |
#ifdef ALTQ |
| |
/* XXX Temporary until ALTQ is changed to use a pfil hook */ |
| |
if (altq_input != NULL && (*altq_input)(m, AF_INET6) == 0) { |
| |
/* packet is dropped by traffic conditioner */ |
| |
return; |
| |
} |
| |
#endif |
| |
|
| /* |
/* |
| * Scope check |
* Scope check |
| */ |
*/ |
| 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)) { |
| ip6stat.ip6s_badscope++; |
ip6stat.ip6s_badscope++; |
| |
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 |
| |
* 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. |
| |
* |
| |
* This check chokes if we are in SIIT cloud. As none of BSDs support |
| |
* IPv4-less kernel compilation, we cannot support SIIT environment |
| |
* at all. So, it makes more sense for us to reject any malicious |
| |
* packets for non-SIIT environment, than try to do a partical support |
| |
* for SIIT environment. |
| |
*/ |
| |
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; |
| |
} |
| |
#if 0 |
| |
/* |
| |
* Reject packets with IPv4 compatible addresses (auto tunnel). |
| |
* |
| |
* The code forbids auto tunnel relay case in RFC1933 (the check is |
| |
* stronger than RFC1933). We may want to re-enable it if mech-xx |
| |
* is revised to forbid relaying case. |
| |
*/ |
| |
if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) || |
| |
IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) { |
| |
ip6stat.ip6s_badscope++; |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
| |
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) { |
#ifndef FAKE_LOOPBACK_IF |
| if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) { |
if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) == 0) |
| ours = 1; |
#else |
| goto hbhcheck; |
if (1) |
| } |
#endif |
| } else { |
{ |
| if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src)) |
if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src)) |
| ip6->ip6_src.s6_addr16[1] |
ip6->ip6_src.s6_addr16[1] |
| = htons(m->m_pkthdr.rcvif->if_index); |
= htons(m->m_pkthdr.rcvif->if_index); |
|
|
| } |
} |
| |
|
| /* |
/* |
| |
* XXX we need this since we do not have "goto ours" hack route |
| |
* for some of our ifaddrs on loopback interface. |
| |
* we should correct it by changing in6_ifattach to install |
| |
* "goto ours" hack route. |
| |
*/ |
| |
if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) != 0) { |
| |
if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) { |
| |
ours = 1; |
| |
deliverifp = m->m_pkthdr.rcvif; |
| |
goto hbhcheck; |
| |
} |
| |
} |
| |
|
| |
/* |
| * Multicast check |
* Multicast check |
| */ |
*/ |
| 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)) |
|
|
| 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 |
| #ifdef __bsdi__ |
ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) { |
| ip6_foward.rt.ro_rt->rt_ifp == &loif |
|
| #else |
|
| ip6_forward_rt.ro_rt->rt_ifp == &loif[0] |
|
| #endif |
|
| ) { |
|
| 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; |
| } |
} |
| } |
} |
| |
|
|
|
| && 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 |
| |
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)) { |
|
|
| */ |
*/ |
| if (m->m_pkthdr.len < off) { |
if (m->m_pkthdr.len < off) { |
| ip6stat.ip6s_tooshort++; |
ip6stat.ip6s_tooshort++; |
| |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated); |
| 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 540 ip6_hopopts_input(plenp, rtalertp, mp, o |
|
| Line 739 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 |
| 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 583 ip6_process_hopopts(m, opthead, hbhlen, |
|
| Line 798 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; |
| |
|
| 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: should we discard the packet? */ |
| log(LOG_ERR, "length of router alert opt is inconsitent(%d)", |
log(LOG_ERR, "length of router alert opt is inconsitent(%d)", |
| *(opt + 1)); |
*(opt + 1)); |
| optlen = IP6OPT_RTALERT_LEN; |
} |
| bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2); |
optlen = IP6OPT_RTALERT_LEN; |
| *rtalertp = ntohs(rtalert_val); |
bcopy((caddr_t)(opt + 2), (caddr_t)&rtalert_val, 2); |
| break; |
*rtalertp = ntohs(rtalert_val); |
| case IP6OPT_JUMBO: |
break; |
| /* XXX may need check for alignment */ |
case IP6OPT_JUMBO: |
| if (hbhlen < IP6OPT_JUMBO_LEN) { |
/* XXX may need check for alignment */ |
| ip6stat.ip6s_toosmall++; |
if (hbhlen < IP6OPT_JUMBO_LEN) { |
| goto bad; |
ip6stat.ip6s_toosmall++; |
| } |
goto bad; |
| if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) |
} |
| /* XXX: should we discard the packet? */ |
if (*(opt + 1) != IP6OPT_JUMBO_LEN - 2) { |
| log(LOG_ERR, "length of jumbopayload opt " |
/* XXX: should we discard the packet? */ |
| "is inconsistent(%d)", |
log(LOG_ERR, "length of jumbopayload opt " |
| *(opt + 1)); |
"is inconsistent(%d)\n", |
| optlen = IP6OPT_JUMBO_LEN; |
*(opt + 1)); |
| |
} |
| /* |
optlen = IP6OPT_JUMBO_LEN; |
| * We can simply cast because of the alignment |
|
| * requirement of the jumbo payload option. |
/* |
| */ |
* IPv6 packets that have non 0 payload length |
| #if 0 |
* must not contain a jumbo payload option. |
| *plenp = ntohl(*(u_int32_t *)(opt + 2)); |
*/ |
| #else |
ip6 = mtod(m, struct ip6_hdr *); |
| bcopy(opt + 2, plenp, sizeof(*plenp)); |
if (ip6->ip6_plen) { |
| *plenp = htonl(*plenp); |
ip6stat.ip6s_badoptions++; |
| |
icmp6_error(m, ICMP6_PARAM_PROB, |
| |
ICMP6_PARAMPROB_HEADER, |
| |
sizeof(struct ip6_hdr) + |
| |
sizeof(struct ip6_hbh) + |
| |
opt - opthead); |
| |
return(-1); |
| |
} |
| |
|
| |
/* |
| |
* We may see jumbolen in unaligned location, so |
| |
* we'd need to perform bcopy(). |
| |
*/ |
| |
bcopy(opt + 2, &jumboplen, sizeof(jumboplen)); |
| |
jumboplen = (u_int32_t)htonl(jumboplen); |
| |
|
| |
#if 1 |
| |
/* |
| |
* if there are multiple jumbo payload options, |
| |
* *plenp will be non-zero and the packet will be |
| |
* rejected. |
| |
* the behavior may need some debate in ipngwg - |
| |
* multiple options does not make sense, however, |
| |
* there's no explicit mention in specification. |
| |
*/ |
| |
if (*plenp != 0) { |
| |
ip6stat.ip6s_badoptions++; |
| |
icmp6_error(m, ICMP6_PARAM_PROB, |
| |
ICMP6_PARAMPROB_HEADER, |
| |
sizeof(struct ip6_hdr) + |
| |
sizeof(struct ip6_hbh) + |
| |
opt + 2 - opthead); |
| |
return(-1); |
| |
} |
| #endif |
#endif |
| if (*plenp <= IPV6_MAXPACKET) { |
|
| /* |
/* |
| * jumbo payload length must be larger |
* jumbo payload length must be larger than 65535. |
| * than 65535 |
*/ |
| */ |
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) + |
sizeof(struct ip6_hdr) + |
| sizeof(struct ip6_hbh) + |
sizeof(struct ip6_hbh) + |
| opt + 2 - opthead); |
opt + 2 - opthead); |
| return(-1); |
return(-1); |
| } |
} |
| |
*plenp = jumboplen; |
| ip6 = mtod(m, struct ip6_hdr *); |
|
| if (ip6->ip6_plen) { |
break; |
| /* |
default: /* unknown option */ |
| * IPv6 packets that have non 0 payload length |
if (hbhlen < IP6OPT_MINLEN) { |
| * must not contain a jumbo paylod option. |
ip6stat.ip6s_toosmall++; |
| */ |
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) + |
| sizeof(struct ip6_hdr) + |
sizeof(struct ip6_hbh) + |
| sizeof(struct ip6_hbh) + |
opt - opthead)) == -1) |
| opt - opthead); |
return(-1); |
| return(-1); |
optlen += 2; |
| } |
break; |
| break; |
|
| default: /* unknown option */ |
|
| if (hbhlen < IP6OPT_MINLEN) { |
|
| ip6stat.ip6s_toosmall++; |
|
| goto bad; |
|
| } |
|
| if ((optlen = ip6_unknown_opt(opt, m, |
|
| sizeof(struct ip6_hdr) + |
|
| sizeof(struct ip6_hbh) + |
|
| opt - opthead)) == -1) |
|
| return(-1); |
|
| optlen += 2; |
|
| break; |
|
| } |
} |
| } |
} |
| |
|
| Line 698 ip6_unknown_opt(optp, m, off) |
|
| Line 934 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 725 ip6_unknown_opt(optp, m, off) |
|
| Line 961 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 750 ip6_savecontrol(in6p, mp, ip6, m) |
|
| Line 995 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 768 ip6_savecontrol(in6p, mp, ip6, m) |
|
| Line 1014 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 797 ip6_savecontrol(in6p, mp, ip6, m) |
|
| Line 1043 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 808 ip6_savecontrol(in6p, mp, ip6, m) |
|
| Line 1053 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 816 ip6_savecontrol(in6p, mp, ip6, m) |
|
| Line 1081 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 836 ip6_savecontrol(in6p, mp, ip6, m) |
|
| Line 1100 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) |
| |
elen = (ip6e->ip6e_len + 2) << 2; |
| |
else |
| |
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) |
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; |
| |
IP6_EXTHDR_GET(ip6e, struct ip6_ext *, m, off, elen); |
| |
if (ip6e == NULL) { |
| |
ip6stat.ip6s_tooshort++; |
| |
return; |
| |
} |
| |
#endif |
| |
|
| |
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 942 ip6_get_prevhdr(m, off) |
|
| Line 1221 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 963 ip6_get_prevhdr(m, off) |
|
| Line 1242 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; |
| |
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; |
| |
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 975 u_char inet6ctlerrmap[PRC_NCMDS] = { |
|
| Line 1363 u_char inet6ctlerrmap[PRC_NCMDS] = { |
|
| ENOPROTOOPT |
ENOPROTOOPT |
| }; |
}; |
| |
|
| #ifdef __NetBSD__ |
#include <uvm/uvm_extern.h> |
| #include <vm/vm.h> |
|
| #include <sys/sysctl.h> |
#include <sys/sysctl.h> |
| |
|
| int |
int |
| Line 988 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
| Line 1375 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 1029 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
| Line 1418 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
| &ip6_gif_hlim); |
&ip6_gif_hlim); |
| 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); |
| |
#ifndef INET6_BINDV6ONLY |
| |
case IPV6CTL_BINDV6ONLY: |
| |
return sysctl_int(oldp, oldlenp, newp, newlen, |
| |
&ip6_bindv6only); |
| |
#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 |
| default: |
default: |
| return EOPNOTSUPP; |
return EOPNOTSUPP; |
| } |
} |
| /* NOTREACHED */ |
/* NOTREACHED */ |
| } |
} |
| #endif /* __NetBSD__ */ |
|