Index: head/sys/netinet6/ip6_forward.c
===================================================================
--- head/sys/netinet6/ip6_forward.c (revision 359962)
+++ head/sys/netinet6/ip6_forward.c (revision 359963)
@@ -1,437 +1,456 @@
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 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
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $KAME: ip6_forward.c,v 1.69 2001/05/17 03:48:30 itojun Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_ipsec.h"
#include "opt_ipstealth.h"
#include "opt_sctp.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/netisr.h>
#include <net/route.h>
+#include <net/route/nhop.h>
#include <net/pfil.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <netinet6/in6_var.h>
#include <netinet/ip6.h>
+#include <netinet6/in6_fib.h>
#include <netinet6/ip6_var.h>
#include <netinet6/scope6_var.h>
#include <netinet/icmp6.h>
#include <netinet6/nd6.h>
#include <netinet/in_pcb.h>
#include <netipsec/ipsec_support.h>
/*
* Forward a packet. If some error occurs return the sender
* an icmp packet. Note we can't always generate a meaningful
* icmp message because icmp doesn't have a large enough repertoire
* of codes and types.
*
* If not forwarding, just drop the packet. This could be confusing
* if ipforwarding was zero but some routing protocol was advancing
* us as a gateway to somewhere. However, we must let the routing
* protocol deal with that.
*
*/
void
ip6_forward(struct mbuf *m, int srcrt)
{
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
- struct sockaddr_in6 *dst = NULL;
- struct rtentry *rt = NULL;
- struct route_in6 rin6;
+ struct sockaddr_in6 dst;
+ struct nhop_object *nh = NULL;
int error, type = 0, code = 0;
struct mbuf *mcopy = NULL;
struct ifnet *origifp; /* maybe unnecessary */
u_int32_t inzone, outzone;
- struct in6_addr src_in6, dst_in6, odst;
+ struct in6_addr odst;
struct m_tag *fwd_tag;
char ip6bufs[INET6_ADDRSTRLEN], ip6bufd[INET6_ADDRSTRLEN];
/*
* Do not forward packets to multicast destination (should be handled
* by ip6_mforward().
* Do not forward packets with unspecified source. It was discussed
* in July 2000, on the ipngwg mailing list.
*/
if ((m->m_flags & (M_BCAST|M_MCAST)) != 0 ||
IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) {
IP6STAT_INC(ip6s_cantforward);
/* XXX in6_ifstat_inc(rt->rt_ifp, ifs6_in_discard) */
if (V_ip6_log_time + V_ip6_log_interval < time_uptime) {
V_ip6_log_time = time_uptime;
log(LOG_DEBUG,
"cannot forward "
"from %s to %s nxt %d received on %s\n",
ip6_sprintf(ip6bufs, &ip6->ip6_src),
ip6_sprintf(ip6bufd, &ip6->ip6_dst),
ip6->ip6_nxt,
if_name(m->m_pkthdr.rcvif));
}
m_freem(m);
return;
}
if (
#ifdef IPSTEALTH
V_ip6stealth == 0 &&
#endif
ip6->ip6_hlim <= IPV6_HLIMDEC) {
/* XXX in6_ifstat_inc(rt->rt_ifp, ifs6_in_discard) */
icmp6_error(m, ICMP6_TIME_EXCEEDED,
ICMP6_TIME_EXCEED_TRANSIT, 0);
return;
}
/*
* Save at most ICMPV6_PLD_MAXLEN (= the min IPv6 MTU -
* size of IPv6 + ICMPv6 headers) bytes of the packet in case
* we need to generate an ICMP6 message to the src.
* Thanks to M_EXT, in most cases copy will not occur.
*
* It is important to save it before IPsec processing as IPsec
* processing may modify the mbuf.
*/
mcopy = m_copym(m, 0, imin(m->m_pkthdr.len, ICMPV6_PLD_MAXLEN),
M_NOWAIT);
#ifdef IPSTEALTH
if (V_ip6stealth == 0)
#endif
ip6->ip6_hlim -= IPV6_HLIMDEC;
#if defined(IPSEC) || defined(IPSEC_SUPPORT)
if (IPSEC_ENABLED(ipv6)) {
if ((error = IPSEC_FORWARD(ipv6, m)) != 0) {
/* mbuf consumed by IPsec */
m_freem(mcopy);
if (error != EINPROGRESS)
IP6STAT_INC(ip6s_cantforward);
return;
}
/* No IPsec processing required */
}
#endif
+ /*
+ * ip6_forward() operates with IPv6 addresses with deembedded scope.
+ *
+ * There are 3 sources of IPv6 destination address:
+ *
+ * 1) ip6_input(), where ip6_dst contains deembedded address.
+ * In order to deal with forwarding of link-local packets,
+ * calculate the scope based on input interface (RFC 4007, clause 9).
+ * 2) packet filters changing ip6_dst directly. It would embed scope
+ * for LL addresses, so in6_localip() performs properly.
+ * 3) packet filters attaching PACKET_TAG_IPFORWARD would embed
+ * scope for the nexthop.
+ */
+ bzero(&dst, sizeof(struct sockaddr_in6));
+ dst.sin6_family = AF_INET6;
+ dst.sin6_addr = ip6->ip6_dst;
+ dst.sin6_scope_id = in6_get_unicast_scopeid(&ip6->ip6_dst, m->m_pkthdr.rcvif);
again:
- bzero(&rin6, sizeof(struct route_in6));
- dst = (struct sockaddr_in6 *)&rin6.ro_dst;
- dst->sin6_len = sizeof(struct sockaddr_in6);
- dst->sin6_family = AF_INET6;
- dst->sin6_addr = ip6->ip6_dst;
-again2:
- rin6.ro_rt = in6_rtalloc1((struct sockaddr *)dst, 0, 0, M_GETFIB(m));
- rt = rin6.ro_rt;
- if (rin6.ro_rt != NULL)
- RT_UNLOCK(rin6.ro_rt);
- else {
+ nh = fib6_lookup(M_GETFIB(m), &dst.sin6_addr, dst.sin6_scope_id,
+ NHR_REF, m->m_pkthdr.flowid);
+ if (nh == NULL) {
IP6STAT_INC(ip6s_noroute);
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_noroute);
if (mcopy) {
icmp6_error(mcopy, ICMP6_DST_UNREACH,
ICMP6_DST_UNREACH_NOROUTE, 0);
}
goto bad;
}
/*
* Source scope check: if a packet can't be delivered to its
* destination for the reason that the destination is beyond the scope
* of the source address, discard the packet and return an icmp6
* destination unreachable error with Code 2 (beyond scope of source
- * address). We use a local copy of ip6_src, since in6_setscope()
- * will possibly modify its first argument.
+ * address).
* [draft-ietf-ipngwg-icmp-v3-04.txt, Section 3.1]
*/
- src_in6 = ip6->ip6_src;
- if (in6_setscope(&src_in6, rt->rt_ifp, &outzone)) {
- /* XXX: this should not happen */
- IP6STAT_INC(ip6s_cantforward);
- IP6STAT_INC(ip6s_badscope);
- goto bad;
- }
- if (in6_setscope(&src_in6, m->m_pkthdr.rcvif, &inzone)) {
- IP6STAT_INC(ip6s_cantforward);
- IP6STAT_INC(ip6s_badscope);
- goto bad;
- }
+ outzone = in6_get_unicast_scopeid(&ip6->ip6_src, nh->nh_ifp);
+ inzone = in6_get_unicast_scopeid(&ip6->ip6_src, m->m_pkthdr.rcvif);
if (inzone != outzone) {
IP6STAT_INC(ip6s_cantforward);
IP6STAT_INC(ip6s_badscope);
- in6_ifstat_inc(rt->rt_ifp, ifs6_in_discard);
+ in6_ifstat_inc(nh->nh_ifp, ifs6_in_discard);
if (V_ip6_log_time + V_ip6_log_interval < time_uptime) {
V_ip6_log_time = time_uptime;
log(LOG_DEBUG,
"cannot forward "
"src %s, dst %s, nxt %d, rcvif %s, outif %s\n",
ip6_sprintf(ip6bufs, &ip6->ip6_src),
ip6_sprintf(ip6bufd, &ip6->ip6_dst),
ip6->ip6_nxt,
- if_name(m->m_pkthdr.rcvif), if_name(rt->rt_ifp));
+ if_name(m->m_pkthdr.rcvif), if_name(nh->nh_ifp));
}
if (mcopy)
icmp6_error(mcopy, ICMP6_DST_UNREACH,
ICMP6_DST_UNREACH_BEYONDSCOPE, 0);
goto bad;
}
/*
* Destination scope check: if a packet is going to break the scope
* zone of packet's destination address, discard it. This case should
* usually be prevented by appropriately-configured routing table, but
* we need an explicit check because we may mistakenly forward the
* packet to a different zone by (e.g.) a default route.
*/
- dst_in6 = ip6->ip6_dst;
- if (in6_setscope(&dst_in6, m->m_pkthdr.rcvif, &inzone) != 0 ||
- in6_setscope(&dst_in6, rt->rt_ifp, &outzone) != 0 ||
- inzone != outzone) {
+ inzone = in6_get_unicast_scopeid(&ip6->ip6_dst, m->m_pkthdr.rcvif);
+ outzone = in6_get_unicast_scopeid(&ip6->ip6_dst, nh->nh_ifp);
+
+ if (inzone != outzone) {
IP6STAT_INC(ip6s_cantforward);
IP6STAT_INC(ip6s_badscope);
goto bad;
}
- if (rt->rt_flags & RTF_GATEWAY)
- dst = (struct sockaddr_in6 *)rt->rt_gateway;
+ if (nh->nh_flags & NHF_GATEWAY) {
+ /* Store gateway address in deembedded form */
+ dst.sin6_addr = nh->gw6_sa.sin6_addr;
+ dst.sin6_scope_id = ntohs(in6_getscope(&dst.sin6_addr));
+ in6_clearscope(&dst.sin6_addr);
+ }
/*
* If we are to forward the packet using the same interface
* as one we got the packet from, perhaps we should send a redirect
* to sender to shortcut a hop.
* Only send redirect if source is sending directly to us,
* and if packet was not source routed (or has any options).
* Also, don't send redirect if forwarding using a route
* modified by a redirect.
*/
- if (V_ip6_sendredirects && rt->rt_ifp == m->m_pkthdr.rcvif && !srcrt &&
- (rt->rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) == 0) {
- if ((rt->rt_ifp->if_flags & IFF_POINTOPOINT) != 0) {
+ if (V_ip6_sendredirects && nh->nh_ifp == m->m_pkthdr.rcvif && !srcrt &&
+ (nh->nh_flags & NHF_REDIRECT) == 0) {
+ if ((nh->nh_ifp->if_flags & IFF_POINTOPOINT) != 0) {
/*
* If the incoming interface is equal to the outgoing
* one, and the link attached to the interface is
* point-to-point, then it will be highly probable
* that a routing loop occurs. Thus, we immediately
* drop the packet and send an ICMPv6 error message.
*
* type/code is based on suggestion by Rich Draves.
* not sure if it is the best pick.
*/
icmp6_error(mcopy, ICMP6_DST_UNREACH,
ICMP6_DST_UNREACH_ADDR, 0);
goto bad;
}
type = ND_REDIRECT;
}
/*
* Fake scoped addresses. Note that even link-local source or
* destinaion can appear, if the originating node just sends the
* packet to us (without address resolution for the destination).
* Since both icmp6_error and icmp6_redirect_output fill the embedded
* link identifiers, we can do this stuff after making a copy for
* returning an error.
*/
- if ((rt->rt_ifp->if_flags & IFF_LOOPBACK) != 0) {
+ if ((nh->nh_ifp->if_flags & IFF_LOOPBACK) != 0) {
/*
* See corresponding comments in ip6_output.
* XXX: but is it possible that ip6_forward() sends a packet
* to a loopback interface? I don't think so, and thus
* I bark here. (jinmei@kame.net)
* XXX: it is common to route invalid packets to loopback.
* also, the codepath will be visited on use of ::1 in
* rthdr. (itojun)
*/
#if 1
if (0)
#else
if ((rt->rt_flags & (RTF_BLACKHOLE|RTF_REJECT)) == 0)
#endif
{
printf("ip6_forward: outgoing interface is loopback. "
"src %s, dst %s, nxt %d, rcvif %s, outif %s\n",
ip6_sprintf(ip6bufs, &ip6->ip6_src),
ip6_sprintf(ip6bufd, &ip6->ip6_dst),
ip6->ip6_nxt, if_name(m->m_pkthdr.rcvif),
- if_name(rt->rt_ifp));
+ if_name(nh->nh_ifp));
}
/* we can just use rcvif in forwarding. */
origifp = m->m_pkthdr.rcvif;
}
else
- origifp = rt->rt_ifp;
+ origifp = nh->nh_ifp;
/*
* clear embedded scope identifiers if necessary.
* in6_clearscope will touch the addresses only when necessary.
*/
in6_clearscope(&ip6->ip6_src);
in6_clearscope(&ip6->ip6_dst);
/* Jump over all PFIL processing if hooks are not active. */
if (!PFIL_HOOKED_OUT(V_inet6_pfil_head))
goto pass;
odst = ip6->ip6_dst;
/* Run through list of hooks for forwarded packets. */
- if (pfil_run_hooks(V_inet6_pfil_head, &m, rt->rt_ifp, PFIL_OUT |
+ if (pfil_run_hooks(V_inet6_pfil_head, &m, nh->nh_ifp, PFIL_OUT |
PFIL_FWD, NULL) != PFIL_PASS)
goto freecopy;
ip6 = mtod(m, struct ip6_hdr *);
/* See if destination IP address was changed by packet filter. */
if (!IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst)) {
m->m_flags |= M_SKIP_FIREWALL;
/* If destination is now ourself drop to ip6_input(). */
if (in6_localip(&ip6->ip6_dst))
m->m_flags |= M_FASTFWD_OURS;
else {
- RTFREE(rt);
+ NH_FREE(nh);
+
+ /* Update address and scopeid. Assume scope is embedded */
+ dst.sin6_scope_id = ntohs(in6_getscope(&ip6->ip6_dst));
+ dst.sin6_addr = ip6->ip6_dst;
+ in6_clearscope(&dst.sin6_addr);
goto again; /* Redo the routing table lookup. */
}
}
/* See if local, if yes, send it to netisr. */
if (m->m_flags & M_FASTFWD_OURS) {
if (m->m_pkthdr.rcvif == NULL)
m->m_pkthdr.rcvif = V_loif;
if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA_IPV6) {
m->m_pkthdr.csum_flags |=
CSUM_DATA_VALID_IPV6 | CSUM_PSEUDO_HDR;
m->m_pkthdr.csum_data = 0xffff;
}
#ifdef SCTP
if (m->m_pkthdr.csum_flags & CSUM_SCTP_IPV6)
m->m_pkthdr.csum_flags |= CSUM_SCTP_VALID;
#endif
error = netisr_queue(NETISR_IPV6, m);
goto out;
}
/* Or forward to some other address? */
if ((m->m_flags & M_IP6_NEXTHOP) &&
(fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL)) != NULL) {
- dst = (struct sockaddr_in6 *)&rin6.ro_dst;
- bcopy((fwd_tag+1), dst, sizeof(struct sockaddr_in6));
+ struct sockaddr_in6 *gw6 = (struct sockaddr_in6 *)(fwd_tag + 1);
+
+ /* Update address and scopeid. Assume scope is embedded */
+ dst.sin6_scope_id = ntohs(in6_getscope(&gw6->sin6_addr));
+ dst.sin6_addr = gw6->sin6_addr;
+ in6_clearscope(&dst.sin6_addr);
+
m->m_flags |= M_SKIP_FIREWALL;
m->m_flags &= ~M_IP6_NEXTHOP;
m_tag_delete(m, fwd_tag);
- RTFREE(rt);
- goto again2;
+ NH_FREE(nh);
+ goto again;
}
pass:
/* See if the size was changed by the packet filter. */
- if (m->m_pkthdr.len > IN6_LINKMTU(rt->rt_ifp)) {
- in6_ifstat_inc(rt->rt_ifp, ifs6_in_toobig);
+ /* TODO: change to nh->nh_mtu */
+ if (m->m_pkthdr.len > IN6_LINKMTU(nh->nh_ifp)) {
+ in6_ifstat_inc(nh->nh_ifp, ifs6_in_toobig);
if (mcopy)
icmp6_error(mcopy, ICMP6_PACKET_TOO_BIG, 0,
- IN6_LINKMTU(rt->rt_ifp));
+ IN6_LINKMTU(nh->nh_ifp));
goto bad;
}
- error = nd6_output_ifp(rt->rt_ifp, origifp, m, dst, NULL);
+ /* Currently LLE layer stores embedded IPv6 addresses */
+ if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr)) {
+ in6_set_unicast_scopeid(&dst.sin6_addr, dst.sin6_scope_id);
+ dst.sin6_scope_id = 0;
+ }
+ error = nd6_output_ifp(nh->nh_ifp, origifp, m, &dst, NULL);
if (error) {
- in6_ifstat_inc(rt->rt_ifp, ifs6_out_discard);
+ in6_ifstat_inc(nh->nh_ifp, ifs6_out_discard);
IP6STAT_INC(ip6s_cantforward);
} else {
IP6STAT_INC(ip6s_forward);
- in6_ifstat_inc(rt->rt_ifp, ifs6_out_forward);
+ in6_ifstat_inc(nh->nh_ifp, ifs6_out_forward);
if (type)
IP6STAT_INC(ip6s_redirectsent);
else {
if (mcopy)
goto freecopy;
}
}
if (mcopy == NULL)
goto out;
switch (error) {
case 0:
if (type == ND_REDIRECT) {
- icmp6_redirect_output(mcopy, rt->rt_nhop);
+ icmp6_redirect_output(mcopy, nh);
goto out;
}
goto freecopy;
case EMSGSIZE:
/* xxx MTU is constant in PPP? */
goto freecopy;
case ENOBUFS:
/* Tell source to slow down like source quench in IP? */
goto freecopy;
case ENETUNREACH: /* shouldn't happen, checked above */
case EHOSTUNREACH:
case ENETDOWN:
case EHOSTDOWN:
default:
type = ICMP6_DST_UNREACH;
code = ICMP6_DST_UNREACH_ADDR;
break;
}
icmp6_error(mcopy, type, code, 0);
goto out;
freecopy:
m_freem(mcopy);
goto out;
bad:
m_freem(m);
out:
- if (rt != NULL)
- RTFREE(rt);
+ if (nh != NULL)
+ NH_FREE(nh);
}
Index: head/sys/netinet6/scope6.c
===================================================================
--- head/sys/netinet6/scope6.c (revision 359962)
+++ head/sys/netinet6/scope6.c (revision 359963)
@@ -1,577 +1,599 @@
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (C) 2000 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 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
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $KAME: scope6.c,v 1.10 2000/07/24 13:29:31 itojun Exp $
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/systm.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/vnet.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
#include <netinet6/in6_var.h>
#include <netinet6/ip6_var.h>
#include <netinet6/scope6_var.h>
#ifdef ENABLE_DEFAULT_SCOPE
VNET_DEFINE(int, ip6_use_defzone) = 1;
#else
VNET_DEFINE(int, ip6_use_defzone) = 0;
#endif
VNET_DEFINE(int, deembed_scopeid) = 1;
SYSCTL_DECL(_net_inet6_ip6);
SYSCTL_INT(_net_inet6_ip6, OID_AUTO, deembed_scopeid, CTLFLAG_VNET | CTLFLAG_RW,
&VNET_NAME(deembed_scopeid), 0,
"Extract embedded zone ID and set it to sin6_scope_id in sockaddr_in6.");
/*
* The scope6_lock protects the global sid default stored in
* sid_default below.
*/
static struct mtx scope6_lock;
#define SCOPE6_LOCK_INIT() mtx_init(&scope6_lock, "scope6_lock", NULL, MTX_DEF)
#define SCOPE6_LOCK() mtx_lock(&scope6_lock)
#define SCOPE6_UNLOCK() mtx_unlock(&scope6_lock)
#define SCOPE6_LOCK_ASSERT() mtx_assert(&scope6_lock, MA_OWNED)
VNET_DEFINE_STATIC(struct scope6_id, sid_default);
#define V_sid_default VNET(sid_default)
#define SID(ifp) \
(((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->scope6_id)
static int scope6_get(struct ifnet *, struct scope6_id *);
static int scope6_set(struct ifnet *, struct scope6_id *);
void
scope6_init(void)
{
bzero(&V_sid_default, sizeof(V_sid_default));
if (!IS_DEFAULT_VNET(curvnet))
return;
SCOPE6_LOCK_INIT();
}
struct scope6_id *
scope6_ifattach(struct ifnet *ifp)
{
struct scope6_id *sid;
sid = malloc(sizeof(*sid), M_IFADDR, M_WAITOK | M_ZERO);
/*
* XXX: IPV6_ADDR_SCOPE_xxx macros are not standard.
* Should we rather hardcode here?
*/
sid->s6id_list[IPV6_ADDR_SCOPE_INTFACELOCAL] = ifp->if_index;
sid->s6id_list[IPV6_ADDR_SCOPE_LINKLOCAL] = ifp->if_index;
return (sid);
}
void
scope6_ifdetach(struct scope6_id *sid)
{
free(sid, M_IFADDR);
}
int
scope6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp)
{
struct in6_ifreq *ifr;
if (ifp->if_afdata[AF_INET6] == NULL)
return (EPFNOSUPPORT);
ifr = (struct in6_ifreq *)data;
switch (cmd) {
case SIOCSSCOPE6:
return (scope6_set(ifp,
(struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
case SIOCGSCOPE6:
return (scope6_get(ifp,
(struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
case SIOCGSCOPE6DEF:
return (scope6_get_default(
(struct scope6_id *)ifr->ifr_ifru.ifru_scope_id));
default:
return (EOPNOTSUPP);
}
}
static int
scope6_set(struct ifnet *ifp, struct scope6_id *idlist)
{
int i;
int error = 0;
struct scope6_id *sid = NULL;
IF_AFDATA_WLOCK(ifp);
sid = SID(ifp);
if (!sid) { /* paranoid? */
IF_AFDATA_WUNLOCK(ifp);
return (EINVAL);
}
/*
* XXX: We need more consistency checks of the relationship among
* scopes (e.g. an organization should be larger than a site).
*/
/*
* TODO(XXX): after setting, we should reflect the changes to
* interface addresses, routing table entries, PCB entries...
*/
for (i = 0; i < 16; i++) {
if (idlist->s6id_list[i] &&
idlist->s6id_list[i] != sid->s6id_list[i]) {
/*
* An interface zone ID must be the corresponding
* interface index by definition.
*/
if (i == IPV6_ADDR_SCOPE_INTFACELOCAL &&
idlist->s6id_list[i] != ifp->if_index) {
IF_AFDATA_WUNLOCK(ifp);
return (EINVAL);
}
if (i == IPV6_ADDR_SCOPE_LINKLOCAL &&
idlist->s6id_list[i] > V_if_index) {
/*
* XXX: theoretically, there should be no
* relationship between link IDs and interface
* IDs, but we check the consistency for
* safety in later use.
*/
IF_AFDATA_WUNLOCK(ifp);
return (EINVAL);
}
/*
* XXX: we must need lots of work in this case,
* but we simply set the new value in this initial
* implementation.
*/
sid->s6id_list[i] = idlist->s6id_list[i];
}
}
IF_AFDATA_WUNLOCK(ifp);
return (error);
}
static int
scope6_get(struct ifnet *ifp, struct scope6_id *idlist)
{
struct epoch_tracker et;
struct scope6_id *sid;
/* We only need to lock the interface's afdata for SID() to work. */
NET_EPOCH_ENTER(et);
sid = SID(ifp);
if (sid == NULL) { /* paranoid? */
NET_EPOCH_EXIT(et);
return (EINVAL);
}
*idlist = *sid;
NET_EPOCH_EXIT(et);
return (0);
}
/*
* Get a scope of the address. Node-local, link-local, site-local or global.
*/
int
in6_addrscope(const struct in6_addr *addr)
{
if (IN6_IS_ADDR_MULTICAST(addr)) {
/*
* Addresses with reserved value F must be treated as
* global multicast addresses.
*/
if (IPV6_ADDR_MC_SCOPE(addr) == 0x0f)
return (IPV6_ADDR_SCOPE_GLOBAL);
return (IPV6_ADDR_MC_SCOPE(addr));
}
if (IN6_IS_ADDR_LINKLOCAL(addr) ||
IN6_IS_ADDR_LOOPBACK(addr))
return (IPV6_ADDR_SCOPE_LINKLOCAL);
if (IN6_IS_ADDR_SITELOCAL(addr))
return (IPV6_ADDR_SCOPE_SITELOCAL);
return (IPV6_ADDR_SCOPE_GLOBAL);
}
/*
* ifp - note that this might be NULL
*/
void
scope6_setdefault(struct ifnet *ifp)
{
/*
* Currently, this function just sets the default "interfaces"
* and "links" according to the given interface.
* We might eventually have to separate the notion of "link" from
* "interface" and provide a user interface to set the default.
*/
SCOPE6_LOCK();
if (ifp) {
V_sid_default.s6id_list[IPV6_ADDR_SCOPE_INTFACELOCAL] =
ifp->if_index;
V_sid_default.s6id_list[IPV6_ADDR_SCOPE_LINKLOCAL] =
ifp->if_index;
} else {
V_sid_default.s6id_list[IPV6_ADDR_SCOPE_INTFACELOCAL] = 0;
V_sid_default.s6id_list[IPV6_ADDR_SCOPE_LINKLOCAL] = 0;
}
SCOPE6_UNLOCK();
}
int
scope6_get_default(struct scope6_id *idlist)
{
SCOPE6_LOCK();
*idlist = V_sid_default;
SCOPE6_UNLOCK();
return (0);
}
u_int32_t
scope6_addr2default(struct in6_addr *addr)
{
u_int32_t id;
/*
* special case: The loopback address should be considered as
* link-local, but there's no ambiguity in the syntax.
*/
if (IN6_IS_ADDR_LOOPBACK(addr))
return (0);
/*
* XXX: 32-bit read is atomic on all our platforms, is it OK
* not to lock here?
*/
SCOPE6_LOCK();
id = V_sid_default.s6id_list[in6_addrscope(addr)];
SCOPE6_UNLOCK();
return (id);
}
/*
* Validate the specified scope zone ID in the sin6_scope_id field. If the ID
* is unspecified (=0), needs to be specified, and the default zone ID can be
* used, the default value will be used.
* This routine then generates the kernel-internal form: if the address scope
* of is interface-local or link-local, embed the interface index in the
* address.
*/
int
sa6_embedscope(struct sockaddr_in6 *sin6, int defaultok)
{
u_int32_t zoneid;
if ((zoneid = sin6->sin6_scope_id) == 0 && defaultok)
zoneid = scope6_addr2default(&sin6->sin6_addr);
if (zoneid != 0 &&
(IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr))) {
/*
* At this moment, we only check interface-local and
* link-local scope IDs, and use interface indices as the
* zone IDs assuming a one-to-one mapping between interfaces
* and links.
*/
if (V_if_index < zoneid || ifnet_byindex(zoneid) == NULL)
return (ENXIO);
/* XXX assignment to 16bit from 32bit variable */
sin6->sin6_addr.s6_addr16[1] = htons(zoneid & 0xffff);
sin6->sin6_scope_id = 0;
}
return 0;
}
/*
* generate standard sockaddr_in6 from embedded form.
*/
int
sa6_recoverscope(struct sockaddr_in6 *sin6)
{
char ip6buf[INET6_ADDRSTRLEN];
u_int32_t zoneid;
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) ||
IN6_IS_ADDR_MC_INTFACELOCAL(&sin6->sin6_addr)) {
/*
* KAME assumption: link id == interface id
*/
zoneid = ntohs(sin6->sin6_addr.s6_addr16[1]);
if (zoneid) {
/* sanity check */
if (V_if_index < zoneid)
return (ENXIO);
#if 0
/* XXX: Disabled due to possible deadlock. */
if (!ifnet_byindex(zoneid))
return (ENXIO);
#endif
if (sin6->sin6_scope_id != 0 &&
zoneid != sin6->sin6_scope_id) {
log(LOG_NOTICE,
"%s: embedded scope mismatch: %s%%%d. "
"sin6_scope_id was overridden\n", __func__,
ip6_sprintf(ip6buf, &sin6->sin6_addr),
sin6->sin6_scope_id);
}
sin6->sin6_addr.s6_addr16[1] = 0;
sin6->sin6_scope_id = zoneid;
}
}
return 0;
}
/*
* Determine the appropriate scope zone ID for in6 and ifp. If ret_id is
* non NULL, it is set to the zone ID. If the zone ID needs to be embedded
* in the in6_addr structure, in6 will be modified.
*
* ret_id - unnecessary?
*/
int
in6_setscope(struct in6_addr *in6, struct ifnet *ifp, u_int32_t *ret_id)
{
int scope;
u_int32_t zoneid = 0;
struct scope6_id *sid;
/*
* special case: the loopback address can only belong to a loopback
* interface.
*/
if (IN6_IS_ADDR_LOOPBACK(in6)) {
if (!(ifp->if_flags & IFF_LOOPBACK))
return (EINVAL);
} else {
scope = in6_addrscope(in6);
if (scope == IPV6_ADDR_SCOPE_INTFACELOCAL ||
scope == IPV6_ADDR_SCOPE_LINKLOCAL) {
/*
* Currently we use interface indices as the
* zone IDs for interface-local and link-local
* scopes.
*/
zoneid = ifp->if_index;
in6->s6_addr16[1] = htons(zoneid & 0xffff); /* XXX */
} else if (scope != IPV6_ADDR_SCOPE_GLOBAL) {
struct epoch_tracker et;
NET_EPOCH_ENTER(et);
sid = SID(ifp);
zoneid = sid->s6id_list[scope];
NET_EPOCH_EXIT(et);
}
}
if (ret_id != NULL)
*ret_id = zoneid;
return (0);
}
/*
* Just clear the embedded scope identifier. Return 0 if the original address
* is intact; return non 0 if the address is modified.
*/
int
in6_clearscope(struct in6_addr *in6)
{
int modified = 0;
if (IN6_IS_SCOPE_LINKLOCAL(in6) || IN6_IS_ADDR_MC_INTFACELOCAL(in6)) {
if (in6->s6_addr16[1] != 0)
modified = 1;
in6->s6_addr16[1] = 0;
}
return (modified);
}
/*
* Return the scope identifier or zero.
*/
uint16_t
in6_getscope(const struct in6_addr *in6)
{
if (IN6_IS_SCOPE_LINKLOCAL(in6) || IN6_IS_ADDR_MC_INTFACELOCAL(in6))
return (in6->s6_addr16[1]);
return (0);
}
/*
+ * Returns scope zone id for the unicast address @in6.
+ *
+ * Returns 0 for global unicast and loopback addresses.
+ * Returns interface index for the link-local addresses.
+ */
+uint32_t
+in6_get_unicast_scopeid(const struct in6_addr *in6, const struct ifnet *ifp)
+{
+
+ if (IN6_IS_SCOPE_LINKLOCAL(in6))
+ return (ifp->if_index);
+ return (0);
+}
+
+void
+in6_set_unicast_scopeid(struct in6_addr *in6, uint32_t scopeid)
+{
+
+ in6->s6_addr16[1] = htons(scopeid & 0xffff);
+}
+
+/*
* Return pointer to ifnet structure, corresponding to the zone id of
* link-local scope.
*/
struct ifnet*
in6_getlinkifnet(uint32_t zoneid)
{
return (ifnet_byindex((u_short)zoneid));
}
/*
* Return zone id for the specified scope.
*/
uint32_t
in6_getscopezone(const struct ifnet *ifp, int scope)
{
if (scope == IPV6_ADDR_SCOPE_INTFACELOCAL ||
scope == IPV6_ADDR_SCOPE_LINKLOCAL)
return (ifp->if_index);
if (scope >= 0 && scope < IPV6_ADDR_SCOPES_COUNT)
return (SID(ifp)->s6id_list[scope]);
return (0);
}
/*
* Extracts scope from adddress @dst, stores cleared address
* inside @dst and zone inside @scopeid
*/
void
in6_splitscope(const struct in6_addr *src, struct in6_addr *dst,
uint32_t *scopeid)
{
uint32_t zoneid;
*dst = *src;
zoneid = ntohs(in6_getscope(dst));
in6_clearscope(dst);
*scopeid = zoneid;
}
/*
* This function is for checking sockaddr_in6 structure passed
* from the application level (usually).
*
* sin6_scope_id should be set for link-local unicast, link-local and
* interface-local multicast addresses.
*
* If it is zero, then look into default zone ids. If default zone id is
* not set or disabled, then return error.
*/
int
sa6_checkzone(struct sockaddr_in6 *sa6)
{
int scope;
scope = in6_addrscope(&sa6->sin6_addr);
if (scope == IPV6_ADDR_SCOPE_GLOBAL)
return (sa6->sin6_scope_id ? EINVAL: 0);
if (IN6_IS_ADDR_MULTICAST(&sa6->sin6_addr) &&
scope != IPV6_ADDR_SCOPE_LINKLOCAL &&
scope != IPV6_ADDR_SCOPE_INTFACELOCAL) {
if (sa6->sin6_scope_id == 0 && V_ip6_use_defzone != 0)
sa6->sin6_scope_id = V_sid_default.s6id_list[scope];
return (0);
}
/*
* Since ::1 address always configured on the lo0, we can
* automatically set its zone id, when it is not specified.
* Return error, when specified zone id doesn't match with
* actual value.
*/
if (IN6_IS_ADDR_LOOPBACK(&sa6->sin6_addr)) {
if (sa6->sin6_scope_id == 0)
sa6->sin6_scope_id = in6_getscopezone(V_loif, scope);
else if (sa6->sin6_scope_id != in6_getscopezone(V_loif, scope))
return (EADDRNOTAVAIL);
}
/* XXX: we can validate sin6_scope_id here */
if (sa6->sin6_scope_id != 0)
return (0);
if (V_ip6_use_defzone != 0)
sa6->sin6_scope_id = V_sid_default.s6id_list[scope];
/* Return error if we can't determine zone id */
return (sa6->sin6_scope_id ? 0: EADDRNOTAVAIL);
}
/*
* This function is similar to sa6_checkzone, but it uses given ifp
* to initialize sin6_scope_id.
*/
int
sa6_checkzone_ifp(struct ifnet *ifp, struct sockaddr_in6 *sa6)
{
int scope;
scope = in6_addrscope(&sa6->sin6_addr);
if (scope == IPV6_ADDR_SCOPE_LINKLOCAL ||
scope == IPV6_ADDR_SCOPE_INTFACELOCAL) {
if (sa6->sin6_scope_id == 0) {
sa6->sin6_scope_id = in6_getscopezone(ifp, scope);
return (0);
} else if (sa6->sin6_scope_id != in6_getscopezone(ifp, scope))
return (EADDRNOTAVAIL);
}
return (sa6_checkzone(sa6));
}
Index: head/sys/netinet6/scope6_var.h
===================================================================
--- head/sys/netinet6/scope6_var.h (revision 359962)
+++ head/sys/netinet6/scope6_var.h (revision 359963)
@@ -1,72 +1,74 @@
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (C) 2000 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 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
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $KAME: scope6_var.h,v 1.4 2000/05/18 15:03:27 jinmei Exp $
* $FreeBSD$
*/
#ifndef _NETINET6_SCOPE6_VAR_H_
#define _NETINET6_SCOPE6_VAR_H_
#ifdef _KERNEL
#include <net/vnet.h>
#define IPV6_ADDR_SCOPES_COUNT 16
struct scope6_id {
/*
* 16 is correspondent to 4bit multicast scope field.
* i.e. from node-local to global with some reserved/unassigned types.
*/
uint32_t s6id_list[IPV6_ADDR_SCOPES_COUNT];
};
VNET_DECLARE(int, deembed_scopeid);
#define V_deembed_scopeid VNET(deembed_scopeid)
void scope6_init(void);
struct scope6_id *scope6_ifattach(struct ifnet *);
void scope6_ifdetach(struct scope6_id *);
int scope6_ioctl(u_long cmd, caddr_t data, struct ifnet *);
void scope6_setdefault(struct ifnet *);
int scope6_get_default(struct scope6_id *);
u_int32_t scope6_addr2default(struct in6_addr *);
int sa6_embedscope(struct sockaddr_in6 *, int);
int sa6_recoverscope(struct sockaddr_in6 *);
int sa6_checkzone(struct sockaddr_in6 *);
int sa6_checkzone_ifp(struct ifnet *, struct sockaddr_in6 *);
int in6_setscope(struct in6_addr *, struct ifnet *, u_int32_t *);
int in6_clearscope(struct in6_addr *);
uint16_t in6_getscope(const struct in6_addr *);
uint32_t in6_getscopezone(const struct ifnet *, int);
void in6_splitscope(const struct in6_addr *, struct in6_addr *, uint32_t *);
struct ifnet* in6_getlinkifnet(uint32_t);
+uint32_t in6_get_unicast_scopeid(const struct in6_addr *, const struct ifnet *);
+void in6_set_unicast_scopeid(struct in6_addr *, uint32_t);
#endif /* _KERNEL */
#endif /* _NETINET6_SCOPE6_VAR_H_ */