version 1.8.8.1, 1999/12/27 18:36:25 |
version 1.25, 2000/07/06 12:36:19 |
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/* $NetBSD$ */ |
/* $NetBSD$ */ |
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/* $KAME: ip6_input.c,v 1.95 2000/07/02 07:49:37 jinmei Exp $ */ |
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/* |
/* |
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
* All rights reserved. |
* All rights reserved. |
* |
* |
* Redistribution and use in source and binary forms, with or without |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* modification, are permitted provided that the following conditions |
* are met: |
* are met: |
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* 3. Neither the name of the project nor the names of its contributors |
* 3. Neither the name of the project nor the names of its contributors |
* may be used to endorse or promote products derived from this software |
* may be used to endorse or promote products derived from this software |
* without specific prior written permission. |
* without specific prior written permission. |
* |
* |
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* @(#)ip_input.c 8.2 (Berkeley) 1/4/94 |
* @(#)ip_input.c 8.2 (Berkeley) 1/4/94 |
*/ |
*/ |
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#ifdef __FreeBSD__ |
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#include "opt_ip6fw.h" |
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#endif |
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#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__) |
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#include "opt_inet.h" |
#include "opt_inet.h" |
#ifdef __NetBSD__ /*XXX*/ |
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#include "opt_ipsec.h" |
#include "opt_ipsec.h" |
#endif |
#include "opt_pfil_hooks.h" |
#endif |
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#include <sys/param.h> |
#include <sys/param.h> |
#include <sys/systm.h> |
#include <sys/systm.h> |
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#include <sys/time.h> |
#include <sys/time.h> |
#include <sys/kernel.h> |
#include <sys/kernel.h> |
#include <sys/syslog.h> |
#include <sys/syslog.h> |
#if !defined(__bsdi__) && !(defined(__FreeBSD__) && __FreeBSD__ < 3) |
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#include <sys/proc.h> |
#include <sys/proc.h> |
#endif |
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#include <net/if.h> |
#include <net/if.h> |
#include <net/if_types.h> |
#include <net/if_types.h> |
#include <net/if_dl.h> |
#include <net/if_dl.h> |
#include <net/route.h> |
#include <net/route.h> |
#include <net/netisr.h> |
#include <net/netisr.h> |
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#ifdef PFIL_HOOKS |
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#include <net/pfil.h> |
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#endif |
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#include <netinet/in.h> |
#include <netinet/in.h> |
#include <netinet/in_systm.h> |
#include <netinet/in_systm.h> |
|
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#include <netinet/ip.h> |
#include <netinet/ip.h> |
#include <netinet/ip_icmp.h> |
#include <netinet/ip_icmp.h> |
#endif /*INET*/ |
#endif /*INET*/ |
#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802) |
#include <netinet/ip6.h> |
#include <netinet/in_pcb.h> |
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#endif |
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#include <netinet6/in6_var.h> |
#include <netinet6/in6_var.h> |
#include <netinet6/ip6.h> |
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#if !((defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__OpenBSD__) || (defined(__bsdi__) && _BSDI_VERSION >= 199802)) |
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#include <netinet6/in6_pcb.h> |
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#endif |
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#include <netinet6/ip6_var.h> |
#include <netinet6/ip6_var.h> |
#include <netinet6/icmp6.h> |
#include <netinet6/in6_pcb.h> |
|
#include <netinet/icmp6.h> |
#include <netinet6/in6_ifattach.h> |
#include <netinet6/in6_ifattach.h> |
#include <netinet6/nd6.h> |
#include <netinet6/nd6.h> |
#include <netinet6/in6_prefix.h> |
#include <netinet6/in6_prefix.h> |
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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. */ |
#ifndef __bsdi__ |
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#include "loop.h" |
#include "loop.h" |
#endif |
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#include "faith.h" |
#include "faith.h" |
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#include "gif.h" |
#include "gif.h" |
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#include <net/net_osdep.h> |
#include <net/net_osdep.h> |
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#ifdef __OpenBSD__ /*KAME IPSEC*/ |
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#undef IPSEC |
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#endif |
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extern struct domain inet6domain; |
extern struct domain inet6domain; |
extern struct ip6protosw inet6sw[]; |
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#ifdef __bsdi__ |
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#if _BSDI_VERSION < 199802 |
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extern struct ifnet loif; |
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#else |
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extern struct ifnet *loifp; |
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#endif |
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#endif |
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u_char ip6_protox[IPPROTO_MAX]; |
u_char ip6_protox[IPPROTO_MAX]; |
static int ip6qmaxlen = IFQ_MAXLEN; |
static int ip6qmaxlen = IFQ_MAXLEN; |
struct in6_ifaddr *in6_ifaddr; |
struct in6_ifaddr *in6_ifaddr; |
struct ifqueue ip6intrq; |
struct ifqueue ip6intrq; |
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#if defined(__NetBSD__) || defined(__OpenBSD__) |
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extern struct ifnet loif[NLOOP]; |
extern struct ifnet loif[NLOOP]; |
#endif |
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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 */ |
Line 171 static void ip6_init2 __P((void *)); |
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Line 146 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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#if defined(PTR) |
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extern int ip6_protocol_tr; |
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int ptr_in6 __P((struct mbuf *, struct mbuf **)); |
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extern void ip_forward __P((struct mbuf *, int)); |
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#endif |
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/* |
/* |
* IP6 initialization: fill in IP6 protocol switch table. |
* IP6 initialization: fill in IP6 protocol switch table. |
* All protocols not implemented in kernel go to raw IP6 protocol handler. |
* All protocols not implemented in kernel go to raw IP6 protocol handler. |
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microtime(&tv); |
microtime(&tv); |
ip6_flow_seq = random() ^ tv.tv_usec; |
ip6_flow_seq = random() ^ tv.tv_usec; |
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#ifndef __FreeBSD__ |
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ip6_init2((void *)0); |
ip6_init2((void *)0); |
#endif |
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} |
} |
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static void |
static void |
ip6_init2(dummy) |
ip6_init2(dummy) |
void *dummy; |
void *dummy; |
{ |
{ |
int ret; |
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#if defined(__bsdi__) && _BSDI_VERSION < 199802 |
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struct ifnet *loifp = &loif; |
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#endif |
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/* get EUI64 from somewhere */ |
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ret = in6_ifattach_getifid(NULL); |
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/* |
/* |
* 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. |
*/ |
*/ |
#ifdef __bsdi__ |
in6_ifattach(&loif[0], NULL); |
in6_ifattach(loifp, IN6_IFT_LOOP, NULL, 0); |
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#else |
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in6_ifattach(&loif[0], IN6_IFT_LOOP, NULL, 0); |
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#endif |
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/* nd6_timer_init */ |
/* nd6_timer_init */ |
timeout(nd6_timer, (caddr_t)0, hz); |
callout_init(&nd6_timer_ch); |
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callout_reset(&nd6_timer_ch, hz, nd6_timer, NULL); |
/* router renumbering prefix list maintenance */ |
/* router renumbering prefix list maintenance */ |
timeout(in6_rr_timer, (caddr_t)0, hz); |
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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#ifdef __FreeBSD__ |
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/* cheat */ |
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SYSINIT(netinet6init2, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, ip6_init2, NULL); |
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#endif |
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/* |
/* |
* IP6 input interrupt handling. Just pass the packet to ip6_input. |
* IP6 input interrupt handling. Just pass the packet to ip6_input. |
*/ |
*/ |
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} |
} |
} |
} |
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#ifdef __FreeBSD__ |
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NETISR_SET(NETISR_IPV6, ip6intr); |
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#endif |
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extern struct route_in6 ip6_forward_rt; |
extern struct route_in6 ip6_forward_rt; |
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void |
void |
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u_int32_t rtalert = ~0; |
u_int32_t rtalert = ~0; |
int nxt, ours = 0; |
int nxt, ours = 0; |
struct ifnet *deliverifp = NULL; |
struct ifnet *deliverifp = NULL; |
#if defined(__bsdi__) && _BSDI_VERSION < 199802 |
#ifdef PFIL_HOOKS |
struct ifnet *loifp = &loif; |
struct packet_filter_hook *pfh; |
#endif |
struct mbuf *m0; |
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int rv; |
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#endif /* PFIL_HOOKS */ |
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#ifdef IPSEC |
#ifdef IPSEC |
/* |
/* |
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} else { |
} else { |
if (m->m_next) { |
if (m->m_next) { |
if (m->m_flags & M_LOOP) { |
if (m->m_flags & M_LOOP) { |
#ifdef __bsdi__ |
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ip6stat.ip6s_m2m[loifp->if_index]++; /*XXX*/ |
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#else |
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ip6stat.ip6s_m2m[loif[0].if_index]++; /*XXX*/ |
ip6stat.ip6s_m2m[loif[0].if_index]++; /*XXX*/ |
#endif |
} else if (m->m_pkthdr.rcvif->if_index <= 31) |
} |
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else if (m->m_pkthdr.rcvif->if_index <= 31) |
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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]++; |
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goto bad; |
goto bad; |
} |
} |
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#ifdef PFIL_HOOKS |
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/* |
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* Run through list of hooks for input packets. If there are any |
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* filters which require that additional packets in the flow are |
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* not fast-forwarded, they must clear the M_CANFASTFWD flag. |
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* Note that filters must _never_ set this flag, as another filter |
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* in the list may have previously cleared it. |
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*/ |
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m0 = m; |
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pfh = pfil_hook_get(PFIL_IN, &inetsw[ip_protox[IPPROTO_IPV6]].pr_pfh); |
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for (; pfh; pfh = pfh->pfil_link.tqe_next) |
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if (pfh->pfil_func) { |
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rv = pfh->pfil_func(ip6, sizeof(*ip6), |
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m->m_pkthdr.rcvif, 0, &m0); |
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if (rv) |
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return; |
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m = m0; |
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if (m == NULL) |
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return; |
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ip6 = mtod(m, struct ip6_hdr *); |
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} |
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#endif /* PFIL_HOOKS */ |
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ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; |
ip6stat.ip6s_nxthist[ip6->ip6_nxt]++; |
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#ifdef IPV6FIREWALL |
#ifdef IPV6FIREWALL |
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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
goto bad; |
goto bad; |
} |
} |
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/* |
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* The following check is not documented in the spec. Malicious party |
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* may be able to use IPv4 mapped addr to confuse tcp/udp stack and |
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* bypass security checks (act as if it was from 127.0.0.1 by using |
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* IPv6 src ::ffff:127.0.0.1). Be cautious. |
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*/ |
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if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
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IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { |
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ip6stat.ip6s_badscope++; |
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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
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goto bad; |
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} |
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#if 0 |
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/* |
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* Reject packets with IPv4 compatible addresses (auto tunnel). |
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* |
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* The code forbids auto tunnel relay case in RFC1933 (the check is |
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* stronger than RFC1933). We may want to re-enable it if mech-xx |
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* is revised to forbid relaying case. |
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*/ |
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if (IN6_IS_ADDR_V4COMPAT(&ip6->ip6_src) || |
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IN6_IS_ADDR_V4COMPAT(&ip6->ip6_dst)) { |
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ip6stat.ip6s_badscope++; |
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in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_addrerr); |
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goto bad; |
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} |
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#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) { |
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} |
} |
} |
} |
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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 |
deliverifp = m->m_pkthdr.rcvif; |
if (1) |
goto hbhcheck; |
#endif |
} |
{ |
} else { |
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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); |
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= htons(m->m_pkthdr.rcvif->if_index); |
= htons(m->m_pkthdr.rcvif->if_index); |
} |
} |
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#if defined(PTR) |
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/* |
/* |
* |
* 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 (ip6_protocol_tr) |
if ((m->m_pkthdr.rcvif->if_flags & IFF_LOOPBACK) != 0) { |
{ |
if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst)) { |
struct mbuf *m1 = NULL; |
ours = 1; |
|
deliverifp = m->m_pkthdr.rcvif; |
switch (ptr_in6(m, &m1)) |
goto hbhcheck; |
{ |
} |
case IPPROTO_IP: goto mcastcheck; |
|
case IPPROTO_IPV4: ip_forward(m1, 0); break; |
|
case IPPROTO_IPV6: ip6_forward(m1, 0); break; |
|
case IPPROTO_MAX: /* discard this packet */ |
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default: |
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} |
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if (m != m1) |
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m_freem(m); |
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return; |
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} |
} |
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mcastcheck: |
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#endif |
|
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/* |
/* |
* Multicast check |
* Multicast check |
*/ |
*/ |
|
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/* |
/* |
* 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, |
|
&ip6_forward_rt.ro_dst.sin6_addr)) |
|
ip6stat.ip6s_forward_cachehit++; |
|
else { |
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; |
} |
} |
|
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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); |
ip6_forward_rt.ro_dst.sin6_len = sizeof(struct sockaddr_in6); |
ip6_forward_rt.ro_dst.sin6_family = AF_INET6; |
ip6_forward_rt.ro_dst.sin6_family = AF_INET6; |
ip6_forward_rt.ro_dst.sin6_addr = ip6->ip6_dst; |
ip6_forward_rt.ro_dst.sin6_addr = ip6->ip6_dst; |
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#ifdef __FreeBSD__ |
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rtalloc_ign((struct route *)&ip6_forward_rt, RTF_PRCLONING); |
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#else |
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rtalloc((struct route *)&ip6_forward_rt); |
rtalloc((struct route *)&ip6_forward_rt); |
#endif |
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} |
} |
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#define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key)) |
#define rt6_key(r) ((struct sockaddr_in6 *)((r)->rt_nodes->rn_key)) |
|
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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 = |
(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? */ |
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. */ |
|
log(LOG_INFO, |
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"ip6_input: packet to an unready address %s->%s", |
|
ip6_sprintf(&ip6->ip6_src), |
|
ip6_sprintf(&ip6->ip6_dst)); |
|
|
|
goto bad; |
} |
} |
} |
} |
|
|
|
|
#endif |
#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 *); |
|
|
|
/* |
|
* 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 |
#ifndef PULLDOWN_TEST |
/* ip6_hopopts_input() ensures that mbuf is contiguous */ |
/* ip6_hopopts_input() ensures that mbuf is contiguous */ |
hbh = (struct ip6_hbh *)(ip6 + 1); |
hbh = (struct ip6_hbh *)(ip6 + 1); |
|
|
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 |
*/ |
*/ |
#if defined(__NetBSD__) && defined(IFA_STATS) |
#ifdef IFA_STATS |
if (IFA_STATS && deliverifp != NULL) { |
if (IFA_STATS && deliverifp != NULL) { |
struct in6_ifaddr *ia6; |
struct in6_ifaddr *ia6; |
ip6 = mtod(m, struct ip6_hdr *); |
|
ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); |
ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst); |
if (ia6) |
if (ia6) |
ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len; |
ia6->ia_ifa.ifa_data.ifad_inbytes += m->m_pkthdr.len; |
Line 761 ip6_process_hopopts(m, opthead, hbhlen, |
|
Line 791 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) { |
Line 789 ip6_process_hopopts(m, opthead, hbhlen, |
|
Line 820 ip6_process_hopopts(m, opthead, hbhlen, |
|
*rtalertp = ntohs(rtalert_val); |
*rtalertp = ntohs(rtalert_val); |
break; |
break; |
case IP6OPT_JUMBO: |
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: should we discard the packet? */ |
log(LOG_ERR, "length of jumbopayload opt " |
log(LOG_ERR, "length of jumbopayload opt " |
"is inconsistent(%d)", |
"is inconsistent(%d)", |
*(opt + 1)); |
*(opt + 1)); |
optlen = IP6OPT_JUMBO_LEN; |
optlen = IP6OPT_JUMBO_LEN; |
|
|
/* |
/* |
* We can simply cast because of the alignment |
* IPv6 packets that have non 0 payload length |
* requirement of the jumbo payload option. |
* must not contain a jumbo paylod option. |
*/ |
*/ |
#if 0 |
ip6 = mtod(m, struct ip6_hdr *); |
*plenp = ntohl(*(u_int32_t *)(opt + 2)); |
if (ip6->ip6_plen) { |
#else |
ip6stat.ip6s_badoptions++; |
bcopy(opt + 2, plenp, sizeof(*plenp)); |
icmp6_error(m, ICMP6_PARAM_PROB, |
*plenp = htonl(*plenp); |
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 |
|
* than 65535 |
|
*/ |
|
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); |
|
} |
|
|
|
ip6 = mtod(m, struct ip6_hdr *); |
/* |
if (ip6->ip6_plen) { |
* jumbo payload length must be larger than 65535. |
/* |
*/ |
* IPv6 packets that have non 0 payload length |
if (jumboplen <= IPV6_MAXPACKET) { |
* must not contain a jumbo paylod option. |
ip6stat.ip6s_badoptions++; |
*/ |
icmp6_error(m, ICMP6_PARAM_PROB, |
ip6stat.ip6s_badoptions++; |
ICMP6_PARAMPROB_HEADER, |
icmp6_error(m, ICMP6_PARAM_PROB, |
sizeof(struct ip6_hdr) + |
ICMP6_PARAMPROB_HEADER, |
sizeof(struct ip6_hbh) + |
sizeof(struct ip6_hdr) + |
opt + 2 - opthead); |
sizeof(struct ip6_hbh) + |
return(-1); |
opt - opthead); |
} |
return(-1); |
*plenp = jumboplen; |
} |
|
break; |
break; |
default: /* unknown option */ |
default: /* unknown option */ |
if (hbhlen < IP6OPT_MINLEN) { |
if (hbhlen < IP6OPT_MINLEN) { |
ip6stat.ip6s_toosmall++; |
ip6stat.ip6s_toosmall++; |
Line 915 ip6_unknown_opt(optp, m, off) |
|
Line 964 ip6_unknown_opt(optp, m, off) |
|
*/ |
*/ |
void |
void |
ip6_savecontrol(in6p, mp, ip6, m) |
ip6_savecontrol(in6p, mp, ip6, m) |
#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(HAVE_NRL_INPCB) |
|
register struct inpcb *in6p; |
|
#else |
|
register struct in6pcb *in6p; |
register struct in6pcb *in6p; |
#endif |
|
register struct mbuf **mp; |
register struct mbuf **mp; |
register struct ip6_hdr *ip6; |
register struct ip6_hdr *ip6; |
register struct mbuf *m; |
register struct mbuf *m; |
{ |
{ |
#ifdef HAVE_NRL_INPCB |
|
# define in6p_flags inp_flags |
|
#endif |
|
#if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) |
|
struct proc *p = curproc; /* XXX */ |
struct proc *p = curproc; /* XXX */ |
#endif |
|
#ifdef __bsdi__ |
|
# define sbcreatecontrol so_cmsg |
|
#endif |
|
int privileged; |
int privileged; |
|
|
privileged = 0; |
privileged = 0; |
#if defined(__NetBSD__) || (defined(__FreeBSD__) && __FreeBSD__ >= 3) |
|
if (p && !suser(p->p_ucred, &p->p_acflag)) |
if (p && !suser(p->p_ucred, &p->p_acflag)) |
privileged++; |
privileged++; |
#else |
|
#ifdef HAVE_NRL_INPCB |
|
if ((in6p->inp_socket->so_state & SS_PRIV) != 0) |
|
privileged++; |
|
#else |
|
if ((in6p->in6p_socket->so_state & SS_PRIV) != 0) |
|
privileged++; |
|
#endif |
|
#endif |
|
|
|
#ifdef SO_TIMESTAMP |
#ifdef SO_TIMESTAMP |
if (in6p->in6p_socket->so_options & SO_TIMESTAMP) { |
if (in6p->in6p_socket->so_options & SO_TIMESTAMP) { |
Line 1152 ip6_savecontrol(in6p, mp, ip6, m) |
|
Line 1179 ip6_savecontrol(in6p, mp, ip6, m) |
|
} |
} |
/* IN6P_RTHDR - to be done */ |
/* IN6P_RTHDR - to be done */ |
|
|
#ifdef __bsdi__ |
|
# undef sbcreatecontrol |
|
#endif |
|
#ifdef __OpenBSD__ |
|
# undef in6p_flags |
|
#endif |
|
} |
} |
|
|
/* |
/* |
Line 1211 ip6_get_prevhdr(m, off) |
|
Line 1232 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 1223 u_char inet6ctlerrmap[PRC_NCMDS] = { |
|
Line 1353 u_char inet6ctlerrmap[PRC_NCMDS] = { |
|
ENOPROTOOPT |
ENOPROTOOPT |
}; |
}; |
|
|
#if defined(__NetBSD__) || defined(__OpenBSD__) |
#include <uvm/uvm_extern.h> |
#include <vm/vm.h> |
|
#include <sys/sysctl.h> |
#include <sys/sysctl.h> |
|
|
int |
int |
Line 1280 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1409 ip6_sysctl(name, namelen, oldp, oldlenp, |
|
case IPV6CTL_USE_DEPRECATED: |
case IPV6CTL_USE_DEPRECATED: |
return sysctl_int(oldp, oldlenp, newp, newlen, |
return sysctl_int(oldp, oldlenp, newp, newlen, |
&ip6_use_deprecated); |
&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 |
default: |
default: |
return EOPNOTSUPP; |
return EOPNOTSUPP; |
} |
} |
/* NOTREACHED */ |
/* NOTREACHED */ |
} |
} |
#endif /* __NetBSD__ || __OpenBSD__ */ |
|
|
|
#ifdef __bsdi__ |
|
int *ip6_sysvars[] = IPV6CTL_VARS; |
|
|
|
int |
|
ip6_sysctl(name, namelen, oldp, oldlenp, newp, newlen) |
|
int *name; |
|
u_int namelen; |
|
void *oldp; |
|
size_t *oldlenp; |
|
void *newp; |
|
size_t newlen; |
|
{ |
|
if (name[0] >= IPV6CTL_MAXID) |
|
return (EOPNOTSUPP); |
|
|
|
switch (name[0]) { |
|
case IPV6CTL_STATS: |
|
return sysctl_rdtrunc(oldp, oldlenp, newp, &ip6stat, |
|
sizeof(ip6stat)); |
|
case IPV6CTL_KAME_VERSION: |
|
return sysctl_rdstring(oldp, oldlenp, newp, __KAME_VERSION); |
|
default: |
|
return (sysctl_int_arr(ip6_sysvars, name, namelen, |
|
oldp, oldlenp, newp, newlen)); |
|
} |
|
} |
|
#endif /* __bsdi__ */ |
|