+/*
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
/* $FreeBSD: src/sys/netinet6/icmp6.c,v 1.6.2.6 2001/07/10 09:44:16 ume Exp $ */
/* $KAME: icmp6.c,v 1.211 2001/04/04 05:56:20 itojun Exp $ */
#include <sys/systm.h>
#include <sys/lock.h>
#include <sys/malloc.h>
+#include <sys/mcache.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/domain.h>
+#include <sys/kauth.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet6/mld6_var.h>
#include <netinet/in_pcb.h>
#include <netinet6/in6_pcb.h>
+#include <netinet6/in6_var.h>
#include <netinet6/nd6.h>
#include <netinet6/in6_ifattach.h>
#include <netinet6/ip6protosw.h>
+#include <netinet6/scope6_var.h>
#if IPSEC
#include <netinet6/ipsec.h>
#include <netkey/key.h>
-
-extern int ipsec_bypass;
#endif
#include <net/net_osdep.h>
-extern struct domain inet6domain;
-extern struct ip6protosw inet6sw[];
+#if NECP
+#include <net/necp.h>
+#endif
+
extern struct ip6protosw *ip6_protox[];
-extern u_long rip_sendspace;
-extern u_long rip_recvspace;
+extern uint32_t rip_sendspace;
+extern uint32_t rip_recvspace;
struct icmp6stat icmp6stat;
extern struct inpcbhead ripcb;
extern int icmp6errppslim;
+extern int icmp6rappslim;
static int icmp6errpps_count = 0;
+static int icmp6rapps_count = 0;
static struct timeval icmp6errppslim_last;
+static struct timeval icmp6rappslim_last;
extern int icmp6_nodeinfo;
extern struct inpcbinfo ripcbinfo;
-extern lck_mtx_t *ip6_mutex;
-extern lck_mtx_t *nd6_mutex;
static void icmp6_errcount(struct icmp6errstat *, int, int);
static int icmp6_rip6_input(struct mbuf **, int);
static int icmp6_ratelimit(const struct in6_addr *, const int, const int);
static const char *icmp6_redirect_diag(struct in6_addr *,
struct in6_addr *, struct in6_addr *);
-#ifndef HAVE_PPSRATECHECK
-static int ppsratecheck(struct timeval *, int *, int);
-#endif
static struct mbuf *ni6_input(struct mbuf *, int);
static struct mbuf *ni6_nametodns(const char *, int, int);
static int ni6_dnsmatch(const char *, int, const char *, int);
-static int ni6_addrs(struct icmp6_nodeinfo *,
+static int ni6_addrs(struct icmp6_nodeinfo *,
struct ifnet **, char *);
static int ni6_store_addrs(struct icmp6_nodeinfo *, struct icmp6_nodeinfo *,
struct ifnet *, int);
static int icmp6_notify_error(struct mbuf *, int, int, int);
-#ifdef COMPAT_RFC1885
-static struct route_in6 icmp6_reflect_rt;
-#endif
void
-icmp6_init()
+icmp6_init(struct ip6protosw *pp, struct domain *dp)
{
- mld6_init();
+#pragma unused(dp)
+ static int icmp6_initialized = 0;
+
+ /* Also called from ip6_init() without pp */
+ VERIFY(pp == NULL ||
+ (pp->pr_flags & (PR_INITIALIZED|PR_ATTACHED)) == PR_ATTACHED);
+
+ /* This gets called by more than one protocols, so initialize once */
+ if (!icmp6_initialized) {
+ icmp6_initialized = 1;
+ mld_init();
+ }
}
static void
-icmp6_errcount(stat, type, code)
- struct icmp6errstat *stat;
- int type, code;
+icmp6_errcount(struct icmp6errstat *stat, int type, int code)
{
switch (type) {
case ICMP6_DST_UNREACH:
stat->icp6errs_unknown++;
}
+/*
+ * A wrapper function for icmp6_error() necessary when the erroneous packet
+ * may not contain enough scope zone information.
+ */
+void
+icmp6_error2(struct mbuf *m, int type, int code, int param,
+ struct ifnet *ifp)
+{
+ struct ip6_hdr *ip6;
+
+ if (ifp == NULL)
+ return;
+
+#ifndef PULLDOWN_TEST
+ IP6_EXTHDR_CHECK(m, 0, sizeof(struct ip6_hdr),return );
+#else
+ if (m->m_len < sizeof(struct ip6_hdr)) {
+ m = m_pullup(m, sizeof(struct ip6_hdr));
+ if (m == NULL)
+ return;
+ }
+#endif
+
+ ip6 = mtod(m, struct ip6_hdr *);
+
+ if (in6_setscope(&ip6->ip6_src, ifp, NULL) != 0)
+ return;
+ if (in6_setscope(&ip6->ip6_dst, ifp, NULL) != 0)
+ return;
+
+ icmp6_error(m, type, code, param);
+}
+
/*
* Generate an error packet of type error in response to bad IP6 packet.
*/
void
-icmp6_error(m, type, code, param)
- struct mbuf *m;
- int type, code, param;
+icmp6_error(struct mbuf *m, int type, int code, int param) {
+ icmp6_error_flag(m, type, code, param, ICMP6_ERROR_RST_MRCVIF);
+}
+
+void icmp6_error_flag (struct mbuf *m, int type, int code, int param, int flags)
{
struct ip6_hdr *oip6, *nip6;
struct icmp6_hdr *icmp6;
icmp6stat.icp6s_error++;
- lck_mtx_assert(ip6_mutex, LCK_MTX_ASSERT_NOTOWNED);
/* count per-type-code statistics */
icmp6_errcount(&icmp6stat.icp6s_outerrhist, type, code);
oip6 = mtod(m, struct ip6_hdr *);
/*
- * Multicast destination check. For unrecognized option errors,
- * this check has already done in ip6_unknown_opt(), so we can
- * check only for other errors.
+ * If the destination address of the erroneous packet is a multicast
+ * address, or the packet was sent using link-layer multicast,
+ * we should basically suppress sending an error (RFC 2463, Section
+ * 2.4).
+ * We have two exceptions (the item e.2 in that section):
+ * - the Pakcet Too Big message can be sent for path MTU discovery.
+ * - the Parameter Problem Message that can be allowed an icmp6 error
+ * in the option type field. This check has been done in
+ * ip6_unknown_opt(), so we can just check the type and code.
*/
if ((m->m_flags & (M_BCAST|M_MCAST) ||
IN6_IS_ADDR_MULTICAST(&oip6->ip6_dst)) &&
code != ICMP6_PARAMPROB_OPTION)))
goto freeit;
- /* Source address check. XXX: the case of anycast source? */
+ /*
+ * RFC 2463, 2.4 (e.5): source address check.
+ * XXX: the case of anycast source?
+ */
if (IN6_IS_ADDR_UNSPECIFIED(&oip6->ip6_src) ||
IN6_IS_ADDR_MULTICAST(&oip6->ip6_src))
goto freeit;
m_adj(m, ICMPV6_PLD_MAXLEN - m->m_pkthdr.len);
preplen = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr);
- M_PREPEND(m, preplen, M_DONTWAIT);
+ M_PREPEND(m, preplen, M_DONTWAIT, 1);
if (m && m->m_len < preplen)
m = m_pullup(m, preplen);
if (m == NULL) {
nip6->ip6_src = oip6->ip6_src;
nip6->ip6_dst = oip6->ip6_dst;
- if (IN6_IS_SCOPE_LINKLOCAL(&oip6->ip6_src))
- oip6->ip6_src.s6_addr16[1] = 0;
- if (IN6_IS_SCOPE_LINKLOCAL(&oip6->ip6_dst))
- oip6->ip6_dst.s6_addr16[1] = 0;
+ in6_clearscope(&oip6->ip6_src);
+ in6_clearscope(&oip6->ip6_dst);
icmp6 = (struct icmp6_hdr *)(nip6 + 1);
icmp6->icmp6_type = type;
/*
* icmp6_reflect() is designed to be in the input path.
- * icmp6_error() can be called from both input and outut path,
+ * icmp6_error() can be called from both input and output path,
* and if we are in output path rcvif could contain bogus value.
* clear m->m_pkthdr.rcvif for safety, we should have enough scope
* information in ip header (nip6).
*/
- m->m_pkthdr.rcvif = NULL;
+ if (flags & ICMP6_ERROR_RST_MRCVIF) {
+ m->m_pkthdr.rcvif = NULL;
+ }
icmp6stat.icp6s_outhist[type]++;
icmp6_reflect(m, sizeof(struct ip6_hdr)); /* header order: IPv6 - ICMPv6 */
freeit:
/*
- * If we can't tell wheter or not we can generate ICMP6, free it.
+ * If we can't tell whether or not we can generate ICMP6, free it.
*/
m_freem(m);
}
* Process a received ICMP6 message.
*/
int
-icmp6_input(mp, offp)
- struct mbuf **mp;
- int *offp;
+icmp6_input(struct mbuf **mp, int *offp, int proto)
{
+#pragma unused(proto)
struct mbuf *m = *mp, *n;
+ struct ifnet *ifp;
struct ip6_hdr *ip6, *nip6;
struct icmp6_hdr *icmp6, *nicmp6;
int off = *offp;
int icmp6len = m->m_pkthdr.len - *offp;
- int code, sum, noff;
+ int code, sum, noff, proxy = 0;
+
+ ifp = m->m_pkthdr.rcvif;
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off, sizeof(struct icmp6_hdr), return IPPROTO_DONE);
/* m might change if M_LOOP. So, call mtod after this */
#endif
+ /* Expect 32-bit aligned data pointer on strict-align platforms */
+ MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
+
/*
* Locate icmp6 structure in mbuf, and check
* that not corrupted and of at least minimum length
*/
-
ip6 = mtod(m, struct ip6_hdr *);
if (icmp6len < sizeof(struct icmp6_hdr)) {
icmp6stat.icp6s_tooshort++;
goto freeit;
}
- /*
- * calculate the checksum
- */
#ifndef PULLDOWN_TEST
icmp6 = (struct icmp6_hdr *)((caddr_t)ip6 + off);
#else
#endif
code = icmp6->icmp6_code;
+ /*
+ * Early check for RFC 6980
+ * Drop certain NDP packets if they came in fragmented
+ */
+ switch (icmp6->icmp6_type) {
+ case ND_ROUTER_SOLICIT:
+ case ND_ROUTER_ADVERT:
+ case ND_NEIGHBOR_SOLICIT:
+ case ND_NEIGHBOR_ADVERT:
+ case ND_REDIRECT:
+ if (m->m_pkthdr.pkt_flags & PKTF_REASSEMBLED) {
+ icmp6stat.icp6s_rfc6980_drop++;
+ goto freeit;
+ }
+ break;
+ default:
+ break;
+ }
+
+ /* Apply rate limit before checksum validation. */
+ if (icmp6_ratelimit(&ip6->ip6_dst, icmp6->icmp6_type, code)) {
+ icmp6stat.icp6s_toofreq++;
+ goto freeit;
+ }
+
+ /*
+ * Check multicast group membership.
+ * Note: SSM filters are not applied for ICMPv6 traffic.
+ */
+ if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ struct in6_multi *inm;
+
+ in6_multihead_lock_shared();
+ IN6_LOOKUP_MULTI(&ip6->ip6_dst, ifp, inm);
+ in6_multihead_lock_done();
+
+ if (inm == NULL) {
+ /*
+ * Don't discard if this is a Neighbor Solicitation
+ * that needs to be proxied (see check down below.)
+ */
+ if (!(m->m_pkthdr.pkt_flags & PKTF_PROXY_DST)) {
+ ip6stat.ip6s_notmember++;
+ in6_ifstat_inc(m->m_pkthdr.rcvif,
+ ifs6_in_discard);
+ goto freeit;
+ }
+ } else {
+ IN6M_REMREF(inm);
+ }
+ }
+
+ /*
+ * calculate the checksum
+ */
if ((sum = in6_cksum(m, IPPROTO_ICMPV6, off, icmp6len)) != 0) {
nd6log((LOG_ERR,
"ICMP6 checksum error(%d|%x) %s\n",
goto freeit;
}
-#if defined(NFAITH) && 0 < NFAITH
- if (faithprefix(&ip6->ip6_dst)) {
+ if (m->m_pkthdr.pkt_flags & PKTF_PROXY_DST) {
/*
- * Deliver very specific ICMP6 type only.
- * This is important to deilver TOOBIG. Otherwise PMTUD
- * will not work.
+ * This is the special case of proxying NS (dst is either
+ * solicited-node multicast or unicast); process it locally
+ * but don't deliver it to sockets. It practically lets us
+ * steer the packet to nd6_prproxy_ns_input, where more
+ * specific tests and actions will be taken.
*/
switch (icmp6->icmp6_type) {
- case ICMP6_DST_UNREACH:
- case ICMP6_PACKET_TOO_BIG:
- case ICMP6_TIME_EXCEEDED:
+ case ND_NEIGHBOR_SOLICIT:
+ proxy = 1;
break;
default:
goto freeit;
}
}
-#endif
icmp6stat.icp6s_inhist[icmp6->icmp6_type]++;
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_msg);
case ICMP6_DST_UNREACH_ADDR:
code = PRC_HOSTDEAD;
break;
-#ifdef COMPAT_RFC1885
- case ICMP6_DST_UNREACH_NOTNEIGHBOR:
- code = PRC_UNREACH_SRCFAIL;
- break;
-#else
case ICMP6_DST_UNREACH_BEYONDSCOPE:
/* I mean "source address was incorrect." */
code = PRC_PARAMPROB;
break;
-#endif
case ICMP6_DST_UNREACH_NOPORT:
code = PRC_UNREACH_PORT;
break;
goto badcode;
}
goto deliver;
- break;
case ICMP6_PACKET_TOO_BIG:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_pkttoobig);
- if (code != 0)
- goto badcode;
code = PRC_MSGSIZE;
* intermediate extension headers.
*/
goto deliver;
- break;
case ICMP6_TIME_EXCEEDED:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_timeexceed);
switch (code) {
case ICMP6_TIME_EXCEED_TRANSIT:
+ code = PRC_TIMXCEED_INTRANS;
+ break;
case ICMP6_TIME_EXCEED_REASSEMBLY:
- code += PRC_TIMXCEED_INTRANS;
+ code = PRC_TIMXCEED_REASS;
break;
default:
goto badcode;
}
goto deliver;
- break;
case ICMP6_PARAM_PROB:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_paramprob);
goto badcode;
}
goto deliver;
- break;
case ICMP6_ECHO_REQUEST:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_echo);
if (code != 0)
goto badcode;
+
if ((n = m_copy(m, 0, M_COPYALL)) == NULL) {
/* Give up remote */
- break;
+ goto rate_limit_checked;
}
if ((n->m_flags & M_EXT) != 0
|| n->m_len < off + sizeof(struct icmp6_hdr)) {
if (maxlen >= MCLBYTES) {
/* Give up remote */
m_freem(n0);
- break;
+ goto rate_limit_checked;
}
MGETHDR(n, M_DONTWAIT, n0->m_type); /* MAC-OK */
if (n && maxlen >= MHLEN) {
if (n == NULL) {
/* Give up remote */
m_freem(n0);
- break;
+ goto rate_limit_checked;
}
M_COPY_PKTHDR(n, n0);
/*
sizeof(*nicmp6));
noff = off;
}
- nicmp6->icmp6_type = ICMP6_ECHO_REPLY;
- nicmp6->icmp6_code = 0;
+ if(nicmp6 == NULL)
+ panic("nicmp6 is NULL in %s, which isn't good!\n", __FUNCTION__);
+ else {
+ nicmp6->icmp6_type = ICMP6_ECHO_REPLY;
+ nicmp6->icmp6_code = 0;
+ }
if (n) {
icmp6stat.icp6s_reflect++;
icmp6stat.icp6s_outhist[ICMP6_ECHO_REPLY]++;
icmp6_reflect(n, noff);
}
- break;
+ goto rate_limit_checked;
case ICMP6_ECHO_REPLY:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_echoreply);
goto badcode;
break;
- case MLD6_LISTENER_QUERY:
- case MLD6_LISTENER_REPORT:
- if (icmp6len < sizeof(struct mld6_hdr))
+ case MLD_LISTENER_QUERY:
+ case MLD_LISTENER_REPORT:
+
+ if (icmp6len < sizeof(struct mld_hdr))
goto badlen;
- if (icmp6->icmp6_type == MLD6_LISTENER_QUERY) /* XXX: ugly... */
+ if (icmp6->icmp6_type == MLD_LISTENER_QUERY) /* XXX: ugly... */
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mldquery);
else
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mldreport);
+
if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
/* give up local */
- mld6_input(m, off);
- m = NULL;
+ if (mld_input(m, off, icmp6len) == IPPROTO_DONE)
+ m = NULL;
goto freeit;
}
- mld6_input(n, off);
+ if (mld_input(n, off, icmp6len) != IPPROTO_DONE)
+ m_freem(n);
/* m stays. */
- break;
+ goto rate_limit_checked;
- case MLD6_LISTENER_DONE:
+ case MLD_LISTENER_DONE:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_mlddone);
- if (icmp6len < sizeof(struct mld6_hdr)) /* necessary? */
+ if (icmp6len < sizeof(struct mld_hdr)) /* necessary? */
goto badlen;
break; /* nothing to be done in kernel */
- case MLD6_MTRACE_RESP:
- case MLD6_MTRACE:
- /* XXX: these two are experimental. not officially defind. */
+ case MLD_MTRACE_RESP:
+ case MLD_MTRACE:
+ /* XXX: these two are experimental. not officially defined. */
/* XXX: per-interface statistics? */
break; /* just pass it to applications */
case ICMP6_NI_QUERY:
if (!icmp6_nodeinfo)
break;
-
- /* By RFC 4620 refuse to answer queries from global scope addresses */
+//### LD 10/20 Check fbsd differences here. Not sure we're more advanced or not.
+ /* By RFC 4620 refuse to answer queries from global scope addresses */
if ((icmp6_nodeinfo & 8) != 8 && in6_addrscope(&ip6->ip6_src) == IPV6_ADDR_SCOPE_GLOBAL)
break;
IP6_EXTHDR_CHECK(m, off, sizeof(struct icmp6_nodeinfo),
return IPPROTO_DONE);
#endif
+
n = m_copy(m, 0, M_COPYALL);
if (n)
n = ni6_input(n, off);
icmp6stat.icp6s_outhist[ICMP6_WRUREPLY]++;
icmp6_reflect(n, noff);
}
- break;
+ goto rate_limit_checked;
case ICMP6_WRUREPLY:
if (code != 0)
goto badcode;
if (icmp6len < sizeof(struct nd_router_solicit))
goto badlen;
+
if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
/* give up local */
nd6_rs_input(m, off, icmp6len);
}
nd6_rs_input(n, off, icmp6len);
/* m stays. */
- break;
+ goto rate_limit_checked;
case ND_ROUTER_ADVERT:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_routeradvert);
goto badcode;
if (icmp6len < sizeof(struct nd_router_advert))
goto badlen;
+
if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
/* give up local */
nd6_ra_input(m, off, icmp6len);
}
nd6_ra_input(n, off, icmp6len);
/* m stays. */
- break;
+ goto rate_limit_checked;
case ND_NEIGHBOR_SOLICIT:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_neighborsolicit);
goto badcode;
if (icmp6len < sizeof(struct nd_neighbor_solicit))
goto badlen;
- if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
+
+ if (proxy ||
+ ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL)) {
/* give up local */
nd6_ns_input(m, off, icmp6len);
m = NULL;
}
nd6_ns_input(n, off, icmp6len);
/* m stays. */
- break;
+ goto rate_limit_checked;
case ND_NEIGHBOR_ADVERT:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_neighboradvert);
goto badcode;
if (icmp6len < sizeof(struct nd_neighbor_advert))
goto badlen;
+
if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
/* give up local */
nd6_na_input(m, off, icmp6len);
}
nd6_na_input(n, off, icmp6len);
/* m stays. */
- break;
+ goto rate_limit_checked;
case ND_REDIRECT:
icmp6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_redirect);
goto badcode;
if (icmp6len < sizeof(struct nd_redirect))
goto badlen;
+
if ((n = m_copym(m, 0, M_COPYALL, M_DONTWAIT)) == NULL) {
/* give up local */
icmp6_redirect_input(m, off);
}
icmp6_redirect_input(n, off);
/* m stays. */
- break;
+ goto rate_limit_checked;
case ICMP6_ROUTER_RENUMBERING:
if (code != ICMP6_ROUTER_RENUMBERING_COMMAND &&
/* deliver */
} else {
/* ICMPv6 informational: MUST not deliver */
- break;
+ goto rate_limit_checked;
}
deliver:
if (icmp6_notify_error(m, off, icmp6len, code)) {
break;
}
- /* deliver the packet to appropriate sockets */
+rate_limit_checked:
icmp6_rip6_input(&m, *offp);
-
return IPPROTO_DONE;
- freeit:
+freeit:
m_freem(m);
return IPPROTO_DONE;
}
static int
-icmp6_notify_error(m, off, icmp6len, code)
- struct mbuf *m;
- int off, icmp6len, code;
+icmp6_notify_error(struct mbuf *m, int off, int icmp6len, int code)
{
struct icmp6_hdr *icmp6;
struct ip6_hdr *eip6;
return(-1);
}
#endif
-
+
if (nxt == IPPROTO_AH)
eoff += (eh->ip6e_len + 2) << 2;
else
/* just ignore a bogus header */
if ((rth0->ip6r0_len % 2) == 0 &&
(hops = rth0->ip6r0_len/2))
- finaldst = (struct in6_addr *)(rth0 + 1) + (hops - 1);
+ finaldst = (struct in6_addr *)(void *)(rth0 + 1) + (hops - 1);
}
eoff += rthlen;
nxt = rth->ip6r_nxt;
eoff, sizeof(*fh));
if (fh == NULL) {
icmp6stat.icp6s_tooshort++;
- return(-1);
+ return (-1);
}
#endif
/*
icmp6 = (struct icmp6_hdr *)(mtod(m, caddr_t) + off);
#else
IP6_EXTHDR_GET(icmp6, struct icmp6_hdr *, m, off,
- sizeof(*icmp6) + sizeof(struct ip6_hdr));
+ sizeof(*icmp6) + sizeof(struct ip6_hdr));
if (icmp6 == NULL) {
icmp6stat.icp6s_tooshort++;
- return(-1);
+ return (-1);
}
#endif
+ /*
+ * retrieve parameters from the inner IPv6 header, and convert
+ * them into sockaddr structures.
+ * XXX: there is no guarantee that the source or destination
+ * addresses of the inner packet are in the same scope as
+ * the addresses of the icmp packet. But there is no other
+ * way to determine the zone.
+ */
eip6 = (struct ip6_hdr *)(icmp6 + 1);
+
bzero(&icmp6dst, sizeof(icmp6dst));
icmp6dst.sin6_len = sizeof(struct sockaddr_in6);
icmp6dst.sin6_family = AF_INET6;
icmp6dst.sin6_addr = eip6->ip6_dst;
else
icmp6dst.sin6_addr = *finaldst;
- icmp6dst.sin6_scope_id = in6_addr2scopeid(m->m_pkthdr.rcvif,
- &icmp6dst.sin6_addr);
-#ifndef SCOPEDROUTING
- if (in6_embedscope(&icmp6dst.sin6_addr, &icmp6dst,
- NULL, NULL)) {
- /* should be impossbile */
- nd6log((LOG_DEBUG,
- "icmp6_notify_error: in6_embedscope failed\n"));
+ if (in6_setscope(&icmp6dst.sin6_addr, m->m_pkthdr.rcvif, NULL))
goto freeit;
- }
-#endif
-
- /*
- * retrieve parameters from the inner IPv6 header, and convert
- * them into sockaddr structures.
- */
bzero(&icmp6src, sizeof(icmp6src));
icmp6src.sin6_len = sizeof(struct sockaddr_in6);
icmp6src.sin6_family = AF_INET6;
icmp6src.sin6_addr = eip6->ip6_src;
- icmp6src.sin6_scope_id = in6_addr2scopeid(m->m_pkthdr.rcvif,
- &icmp6src.sin6_addr);
-#ifndef SCOPEDROUTING
- if (in6_embedscope(&icmp6src.sin6_addr, &icmp6src,
- NULL, NULL)) {
- /* should be impossbile */
- nd6log((LOG_DEBUG,
- "icmp6_notify_error: in6_embedscope failed\n"));
+ if (in6_setscope(&icmp6src.sin6_addr, m->m_pkthdr.rcvif, NULL))
goto freeit;
- }
-#endif
icmp6src.sin6_flowinfo =
- (eip6->ip6_flow & IPV6_FLOWLABEL_MASK);
+ (eip6->ip6_flow & IPV6_FLOWLABEL_MASK);
if (finaldst == NULL)
finaldst = &eip6->ip6_dst;
}
return(0);
- freeit:
+freeit:
m_freem(m);
return(-1);
}
void
-icmp6_mtudisc_update(ip6cp, validated)
- struct ip6ctlparam *ip6cp;
- int validated;
+icmp6_mtudisc_update(struct ip6ctlparam *ip6cp, int validated)
{
struct in6_addr *dst = ip6cp->ip6c_finaldst;
struct icmp6_hdr *icmp6 = ip6cp->ip6c_icmp6;
u_int mtu = ntohl(icmp6->icmp6_mtu);
struct rtentry *rt = NULL;
struct sockaddr_in6 sin6;
+ /*
+ * we reject ICMPv6 too big with abnormally small value.
+ * XXX what is the good definition of "abnormally small"?
+ */
+ if (mtu < sizeof(struct ip6_hdr) + sizeof(struct ip6_frag) + 8)
+ return;
if (!validated)
return;
+ /*
+ * In case the suggested mtu is less than IPV6_MMTU, we
+ * only need to remember that it was for above mentioned
+ * "alwaysfrag" case.
+ * Try to be as close to the spec as possible.
+ */
+ if (mtu < IPV6_MMTU)
+ mtu = IPV6_MMTU - 8;
+
bzero(&sin6, sizeof(sin6));
sin6.sin6_family = PF_INET6;
sin6.sin6_len = sizeof(struct sockaddr_in6);
htons(m->m_pkthdr.rcvif->if_index);
}
/* sin6.sin6_scope_id = XXX: should be set if DST is a scoped addr */
- rt = rtalloc1((struct sockaddr *)&sin6, 0, RTF_CLONING | RTF_PRCLONING);
-
- if (rt && (rt->rt_flags & RTF_HOST)
- && !(rt->rt_rmx.rmx_locks & RTV_MTU)) {
- if (mtu < IPV6_MMTU) {
- /* xxx */
- rt->rt_rmx.rmx_locks |= RTV_MTU;
- } else if (mtu < rt->rt_ifp->if_mtu &&
- rt->rt_rmx.rmx_mtu > mtu) {
+ /*
+ * XXX On a side note, for asymmetric data-path
+ * the lookup on receive interace is probably not
+ * what we want to do.
+ * That requires looking at the cached route for the
+ * protocol control block.
+ */
+ rt = rtalloc1_scoped((struct sockaddr *)&sin6, 0,
+ RTF_CLONING | RTF_PRCLONING, m->m_pkthdr.rcvif->if_index);
+ if (rt != NULL) {
+ RT_LOCK(rt);
+ if ((rt->rt_flags & RTF_HOST) &&
+ !(rt->rt_rmx.rmx_locks & RTV_MTU) &&
+ mtu < IN6_LINKMTU(rt->rt_ifp) &&
+ rt->rt_rmx.rmx_mtu > mtu) {
icmp6stat.icp6s_pmtuchg++;
rt->rt_rmx.rmx_mtu = mtu;
}
- }
- if (rt)
+ RT_UNLOCK(rt);
rtfree(rt);
+ }
}
/*
* Process a Node Information Query packet, based on
* draft-ietf-ipngwg-icmp-name-lookups-07.
- *
+ *
* Spec incompatibilities:
* - IPv6 Subject address handling
* - IPv4 Subject address handling support missing
*/
#define hostnamelen strlen(hostname)
static struct mbuf *
-ni6_input(m, off)
- struct mbuf *m;
- int off;
+ni6_input(struct mbuf *m, int off)
{
struct icmp6_nodeinfo *ni6, *nni6;
struct mbuf *n = NULL;
struct ip6_hdr *ip6;
int oldfqdn = 0; /* if 1, return pascal string (03 draft) */
char *subj = NULL;
- struct in6_ifaddr *ia6 = NULL;
ip6 = mtod(m, struct ip6_hdr *);
#ifndef PULLDOWN_TEST
IP6_EXTHDR_GET(ni6, struct icmp6_nodeinfo *, m, off, sizeof(*ni6));
if (ni6 == NULL) {
/* m is already reclaimed */
- return NULL;
+ return (NULL);
}
#endif
+ /*
+ * Validate IPv6 source address.
+ * The default configuration MUST be to refuse answering queries from
+ * global-scope addresses according to RFC4602.
+ * Notes:
+ * - it's not very clear what "refuse" means; this implementation
+ * simply drops it.
+ * - it's not very easy to identify global-scope (unicast) addresses
+ * since there are many prefixes for them. It should be safer
+ * and in practice sufficient to check "all" but loopback and
+ * link-local (note that site-local unicast was deprecated and
+ * ULA is defined as global scope-wise)
+ */
+ if ((icmp6_nodeinfo & ICMP6_NODEINFO_GLOBALOK) == 0 &&
+ !IN6_IS_ADDR_LOOPBACK(&ip6->ip6_src) &&
+ !IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_src))
+ goto bad;
+
/*
* Validate IPv6 destination address.
*
* The Responder must discard the Query without further processing
* unless it is one of the Responder's unicast or anycast addresses, or
* a link-local scope multicast address which the Responder has joined.
- * [icmp-name-lookups-07, Section 4.]
+ * [RFC4602, Section 5.]
*/
- bzero(&sin6, sizeof(sin6));
- sin6.sin6_family = AF_INET6;
- sin6.sin6_len = sizeof(struct sockaddr_in6);
- bcopy(&ip6->ip6_dst, &sin6.sin6_addr, sizeof(sin6.sin6_addr));
- /* XXX scopeid */
- if ((ia6 = (struct in6_ifaddr *)ifa_ifwithaddr((struct sockaddr *)&sin6)) != NULL) {
- /* unicast/anycast, fine */
- if ((ia6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
- (icmp6_nodeinfo & 4) == 0) {
- ifafree(&ia6->ia_ifa);
- ia6 = NULL;
+ if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+ if (!IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst))
+ goto bad;
+ /* else it's a link-local multicast, fine */
+ } else { /* unicast or anycast */
+ uint32_t ia6_flags;
+
+ if (ip6_getdstifaddr_info(m, NULL, &ia6_flags) != 0)
+ goto bad; /* XXX impossible */
+
+ if ((ia6_flags & IN6_IFF_TEMPORARY) &&
+ !(icmp6_nodeinfo & ICMP6_NODEINFO_TMPADDROK)) {
nd6log((LOG_DEBUG, "ni6_input: ignore node info to "
"a temporary address in %s:%d",
__FILE__, __LINE__));
goto bad;
}
- ifafree(&ia6->ia_ifa);
- ia6 = NULL;
- } else if (IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr))
- ; /* link-local multicast, fine */
- else
- goto bad;
+ }
/* validate query Subject field. */
qtype = ntohs(ni6->ni_qtype);
/* FALLTHROUGH */
case NI_QTYPE_FQDN:
case NI_QTYPE_NODEADDR:
+ case NI_QTYPE_IPV4ADDR:
switch (ni6->ni_code) {
case ICMP6_NI_SUBJ_IPV6:
#if ICMP6_NI_SUBJ_IPV6 != 0
goto bad;
#endif
- if (subjlen != sizeof(sin6.sin6_addr))
+ if (subjlen != sizeof(struct in6_addr))
goto bad;
/*
subjlen, (caddr_t)&sin6.sin6_addr);
sin6.sin6_scope_id = in6_addr2scopeid(m->m_pkthdr.rcvif,
&sin6.sin6_addr);
-#ifndef SCOPEDROUTING
- in6_embedscope(&sin6.sin6_addr, &sin6, NULL, NULL);
-#endif
+ in6_embedscope(&sin6.sin6_addr, &sin6, NULL, NULL,
+ NULL);
bzero(&sin6_d, sizeof(sin6_d));
sin6_d.sin6_family = AF_INET6; /* not used, actually */
sin6_d.sin6_len = sizeof(sin6_d); /* ditto */
sin6_d.sin6_addr = ip6->ip6_dst;
sin6_d.sin6_scope_id = in6_addr2scopeid(m->m_pkthdr.rcvif,
&ip6->ip6_dst);
-#ifndef SCOPEDROUTING
- in6_embedscope(&sin6_d.sin6_addr, &sin6_d, NULL, NULL);
-#endif
+ in6_embedscope(&sin6_d.sin6_addr, &sin6_d, NULL, NULL,
+ NULL);
subj = (char *)&sin6;
if (SA6_ARE_ADDR_EQUAL(&sin6, &sin6_d))
break;
* XXX if we are to allow other cases, we should really
* be careful about scope here.
* basically, we should disallow queries toward IPv6
- * destination X with subject Y, if scope(X) > scope(Y).
+ * destination X with subject Y,
+ * if scope(X) > scope(Y).
* if we allow scope(X) > scope(Y), it will result in
* information leakage across scope boundary.
*/
/* refuse based on configuration. XXX ICMP6_NI_REFUSED? */
switch (qtype) {
case NI_QTYPE_FQDN:
- if ((icmp6_nodeinfo & 1) == 0)
+ if ((icmp6_nodeinfo & ICMP6_NODEINFO_FQDNOK) == 0)
goto bad;
break;
case NI_QTYPE_NODEADDR:
- if ((icmp6_nodeinfo & 2) == 0)
+ case NI_QTYPE_IPV4ADDR:
+ if ((icmp6_nodeinfo & ICMP6_NODEINFO_NODEADDROK) == 0)
goto bad;
break;
}
case NI_QTYPE_NODEADDR:
addrs = ni6_addrs(ni6, &ifp, subj);
if ((replylen += addrs * (sizeof(struct in6_addr) +
- sizeof(u_int32_t))) > MCLBYTES)
+ sizeof(u_int32_t))) > MCLBYTES)
replylen = MCLBYTES; /* XXX: will truncate pkt later */
break;
+ case NI_QTYPE_IPV4ADDR:
+ /* unsupported - should respond with unknown Qtype? */
+ break;
default:
/*
* XXX: We must return a reply with the ICMP6 code
- * `unknown Qtype' in this case. However we regard the case
+ * `unknown Qtype' in this case. However we regard the case
* as an FQDN query for backward compatibility.
* Older versions set a random value to this field,
* so it rarely varies in the defined qtypes.
MGETHDR(n, M_DONTWAIT, m->m_type); /* MAC-OK */
if (n == NULL) {
m_freem(m);
- return(NULL);
+ if (ifp != NULL)
+ ifnet_release(ifp);
+ return (NULL);
}
M_COPY_PKTHDR(n, m); /* just for recvif */
if (replylen > MHLEN) {
nni6->ni_type = ICMP6_NI_REPLY;
m_freem(m);
- return(n);
+ if (ifp != NULL)
+ ifnet_release(ifp);
+ return (n);
- bad:
+bad:
m_freem(m);
if (n)
m_freem(n);
- return(NULL);
+ if (ifp != NULL)
+ ifnet_release(ifp);
+ return (NULL);
}
#undef hostnamelen
* treated as truncated name (two \0 at the end). this is a wild guess.
*/
static struct mbuf *
-ni6_nametodns(name, namelen, old)
- const char *name;
- int namelen;
- int old; /* return pascal string if non-zero */
+ni6_nametodns(
+ const char *name,
+ int namelen,
+ int old) /* return pascal string if non-zero */
{
struct mbuf *m;
char *cp, *ep;
* XXX upper/lowercase match (see RFC2065)
*/
static int
-ni6_dnsmatch(a, alen, b, blen)
- const char *a;
- int alen;
- const char *b;
- int blen;
+ni6_dnsmatch(const char *a, int alen, const char *b, int blen)
{
const char *a0, *b0;
int l;
* calculate the number of addresses to be returned in the node info reply.
*/
static int
-ni6_addrs(ni6, ifpp, subj)
- struct icmp6_nodeinfo *ni6;
- struct ifnet **ifpp;
- char *subj;
+ni6_addrs(struct icmp6_nodeinfo *ni6, struct ifnet **ifpp, char *subj)
{
struct ifnet *ifp;
struct in6_ifaddr *ifa6;
int addrs = 0, addrsofif, iffound = 0;
int niflags = ni6->ni_flags;
+ if (ifpp != NULL)
+ *ifpp = NULL;
+
if ((niflags & NI_NODEADDR_FLAG_ALL) == 0) {
switch (ni6->ni_code) {
case ICMP6_NI_SUBJ_IPV6:
if (subj == NULL) /* must be impossible... */
return(0);
- subj_ip6 = (struct sockaddr_in6 *)subj;
+ subj_ip6 = (struct sockaddr_in6 *)(void *)subj;
break;
default:
/*
* XXX: we only support IPv6 subject address for
* this Qtype.
*/
- return(0);
+ return (0);
}
}
ifnet_lock_shared(ifp);
TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)
{
- if (ifa->ifa_addr->sa_family != AF_INET6)
+ IFA_LOCK(ifa);
+ if (ifa->ifa_addr->sa_family != AF_INET6) {
+ IFA_UNLOCK(ifa);
continue;
+ }
ifa6 = (struct in6_ifaddr *)ifa;
if ((niflags & NI_NODEADDR_FLAG_ALL) == 0 &&
/* What do we have to do about ::1? */
switch (in6_addrscope(&ifa6->ia_addr.sin6_addr)) {
case IPV6_ADDR_SCOPE_LINKLOCAL:
- if ((niflags & NI_NODEADDR_FLAG_LINKLOCAL) == 0)
+ if ((niflags & NI_NODEADDR_FLAG_LINKLOCAL) == 0) {
+ IFA_UNLOCK(ifa);
continue;
+ }
break;
case IPV6_ADDR_SCOPE_SITELOCAL:
- if ((niflags & NI_NODEADDR_FLAG_SITELOCAL) == 0)
+ if ((niflags & NI_NODEADDR_FLAG_SITELOCAL) == 0) {
+ IFA_UNLOCK(ifa);
continue;
+ }
break;
case IPV6_ADDR_SCOPE_GLOBAL:
- if ((niflags & NI_NODEADDR_FLAG_GLOBAL) == 0)
+ if ((niflags & NI_NODEADDR_FLAG_GLOBAL) == 0) {
+ IFA_UNLOCK(ifa);
continue;
+ }
break;
default:
+ IFA_UNLOCK(ifa);
continue;
}
* XXX: just experimental. not in the spec.
*/
if ((ifa6->ia6_flags & IN6_IFF_ANYCAST) != 0 &&
- (niflags & NI_NODEADDR_FLAG_ANYCAST) == 0)
+ (niflags & NI_NODEADDR_FLAG_ANYCAST) == 0) {
+ IFA_UNLOCK(ifa);
continue; /* we need only unicast addresses */
+ }
if ((ifa6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
- (icmp6_nodeinfo & 4) == 0) {
+ (icmp6_nodeinfo & ICMP6_NODEINFO_TMPADDROK) == 0) {
+ IFA_UNLOCK(ifa);
continue;
}
addrsofif++; /* count the address */
+ IFA_UNLOCK(ifa);
}
ifnet_lock_done(ifp);
if (iffound) {
- *ifpp = ifp;
+ if (ifpp != NULL) {
+ *ifpp = ifp;
+ ifnet_reference(ifp);
+ }
ifnet_head_done();
return(addrsofif);
}
}
ifnet_head_done();
- return(addrs);
+ return (addrs);
}
static int
-ni6_store_addrs(ni6, nni6, ifp0, resid)
- struct icmp6_nodeinfo *ni6, *nni6;
- struct ifnet *ifp0;
- int resid;
+ni6_store_addrs(struct icmp6_nodeinfo *ni6, struct icmp6_nodeinfo *nni6,
+ struct ifnet *ifp0, int resid)
{
struct ifnet *ifp = ifp0;
struct in6_ifaddr *ifa6;
u_char *cp = (u_char *)(nni6 + 1);
int niflags = ni6->ni_flags;
u_int32_t ltime;
- struct timeval timenow;
-
- getmicrotime(&timenow);
+ uint64_t now = net_uptime();
if (ifp0 == NULL && !(niflags & NI_NODEADDR_FLAG_ALL))
- return(0); /* needless to copy */
+ return (0); /* needless to copy */
again:
ifnet_head_lock_shared();
- if (ifp == NULL) ifp = TAILQ_FIRST(&ifnet_head);
-
+ if (ifp == NULL)
+ ifp = TAILQ_FIRST(&ifnet_head);
+
for (; ifp; ifp = TAILQ_NEXT(ifp, if_list)) {
ifnet_lock_shared(ifp);
for (ifa = ifp->if_addrlist.tqh_first; ifa;
- ifa = ifa->ifa_list.tqe_next)
- {
- if (ifa->ifa_addr->sa_family != AF_INET6)
+ ifa = ifa->ifa_list.tqe_next) {
+ struct in6_addrlifetime_i *lt;
+
+ IFA_LOCK(ifa);
+ if (ifa->ifa_addr->sa_family != AF_INET6) {
+ IFA_UNLOCK(ifa);
continue;
+ }
ifa6 = (struct in6_ifaddr *)ifa;
if ((ifa6->ia6_flags & IN6_IFF_DEPRECATED) != 0 &&
if (ifp_dep == NULL)
ifp_dep = ifp;
+ IFA_UNLOCK(ifa);
continue;
- }
- else if ((ifa6->ia6_flags & IN6_IFF_DEPRECATED) == 0 &&
- allow_deprecated != 0)
+ } else if ((ifa6->ia6_flags & IN6_IFF_DEPRECATED) == 0 &&
+ allow_deprecated != 0) {
+ IFA_UNLOCK(ifa);
continue; /* we now collect deprecated addrs */
-
+ }
/* What do we have to do about ::1? */
switch (in6_addrscope(&ifa6->ia_addr.sin6_addr)) {
case IPV6_ADDR_SCOPE_LINKLOCAL:
- if ((niflags & NI_NODEADDR_FLAG_LINKLOCAL) == 0)
+ if ((niflags & NI_NODEADDR_FLAG_LINKLOCAL) == 0) {
+ IFA_UNLOCK(ifa);
continue;
+ }
break;
case IPV6_ADDR_SCOPE_SITELOCAL:
- if ((niflags & NI_NODEADDR_FLAG_SITELOCAL) == 0)
+ if ((niflags & NI_NODEADDR_FLAG_SITELOCAL) == 0) {
+ IFA_UNLOCK(ifa);
continue;
+ }
break;
case IPV6_ADDR_SCOPE_GLOBAL:
- if ((niflags & NI_NODEADDR_FLAG_GLOBAL) == 0)
+ if ((niflags & NI_NODEADDR_FLAG_GLOBAL) == 0) {
+ IFA_UNLOCK(ifa);
continue;
+ }
break;
default:
+ IFA_UNLOCK(ifa);
continue;
}
/*
* check if anycast is okay.
- * XXX: just experimental. not in the spec.
+ * XXX: just experimental. not in the spec.
*/
if ((ifa6->ia6_flags & IN6_IFF_ANYCAST) != 0 &&
- (niflags & NI_NODEADDR_FLAG_ANYCAST) == 0)
+ (niflags & NI_NODEADDR_FLAG_ANYCAST) == 0) {
+ IFA_UNLOCK(ifa);
continue;
+ }
if ((ifa6->ia6_flags & IN6_IFF_TEMPORARY) != 0 &&
- (icmp6_nodeinfo & 4) == 0) {
+ (icmp6_nodeinfo & ICMP6_NODEINFO_TMPADDROK) == 0) {
+ IFA_UNLOCK(ifa);
continue;
}
/* now we can copy the address */
if (resid < sizeof(struct in6_addr) +
sizeof(u_int32_t)) {
+ IFA_UNLOCK(ifa);
/*
* We give up much more copy.
* Set the truncate flag and return.
* address configuration by DHCPv6, so the former
* case can't happen.
*/
- if (ifa6->ia6_lifetime.ia6t_expire == 0)
+ lt = &ifa6->ia6_lifetime;
+ if (lt->ia6ti_expire == 0) {
ltime = ND6_INFINITE_LIFETIME;
- else {
- if (ifa6->ia6_lifetime.ia6t_expire >
- timenow.tv_sec)
- ltime = htonl(ifa6->ia6_lifetime.ia6t_expire - timenow.tv_sec);
+ } else {
+ if (lt->ia6ti_expire > now)
+ ltime = htonl(lt->ia6ti_expire - now);
else
ltime = 0;
}
-
+
bcopy(<ime, cp, sizeof(u_int32_t));
cp += sizeof(u_int32_t);
sizeof(struct in6_addr));
/* XXX: KAME link-local hack; remove ifindex */
if (IN6_IS_ADDR_LINKLOCAL(&ifa6->ia_addr.sin6_addr))
- ((struct in6_addr *)cp)->s6_addr16[1] = 0;
+ ((struct in6_addr *)(void *)cp)->s6_addr16[1] = 0;
cp += sizeof(struct in6_addr);
-
+
resid -= (sizeof(struct in6_addr) + sizeof(u_int32_t));
copied += (sizeof(struct in6_addr) +
sizeof(u_int32_t));
+ IFA_UNLOCK(ifa);
}
ifnet_lock_done(ifp);
if (ifp0) /* we need search only on the specified IF */
* XXX almost dup'ed code with rip6_input.
*/
static int
-icmp6_rip6_input(mp, off)
- struct mbuf **mp;
- int off;
+icmp6_rip6_input(struct mbuf **mp, int off)
{
struct mbuf *m = *mp;
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
struct sockaddr_in6 rip6src;
struct icmp6_hdr *icmp6;
struct mbuf *opts = NULL;
+ int ret = 0;
+ struct ifnet *ifp = m->m_pkthdr.rcvif;
#ifndef PULLDOWN_TEST
/* this is assumed to be safe. */
}
#endif
+ /*
+ * XXX: the address may have embedded scope zone ID, which should be
+ * hidden from applications.
+ */
bzero(&rip6src, sizeof(rip6src));
- rip6src.sin6_len = sizeof(struct sockaddr_in6);
rip6src.sin6_family = AF_INET6;
- /* KAME hack: recover scopeid */
- (void)in6_recoverscope(&rip6src, &ip6->ip6_src, m->m_pkthdr.rcvif);
+ rip6src.sin6_len = sizeof(struct sockaddr_in6);
+ rip6src.sin6_addr = ip6->ip6_src;
+ if (sa6_recoverscope(&rip6src, TRUE))
+ return (IPPROTO_DONE);
- lck_rw_lock_shared(ripcbinfo.mtx);
+ lck_rw_lock_shared(ripcbinfo.ipi_lock);
LIST_FOREACH(in6p, &ripcb, inp_list)
{
if ((in6p->inp_vflag & INP_IPV6) == 0)
continue;
-#if HAVE_NRL_INPCB
- if (!(in6p->in6p_flags & INP_IPV6))
- continue;
-#endif
if (in6p->in6p_ip6_nxt != IPPROTO_ICMPV6)
continue;
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) &&
&& ICMP6_FILTER_WILLBLOCK(icmp6->icmp6_type,
in6p->in6p_icmp6filt))
continue;
+
+ if (inp_restricted_recv(in6p, ifp))
+ continue;
+
if (last) {
struct mbuf *n;
if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
- if (last->in6p_flags & IN6P_CONTROLOPTS)
- ip6_savecontrol(last, &opts, ip6, n);
+ if ((last->in6p_flags & INP_CONTROLOPTS) != 0 ||
+ (last->in6p_socket->so_options & SO_TIMESTAMP) != 0 ||
+ (last->in6p_socket->so_options & SO_TIMESTAMP_MONOTONIC) != 0) {
+ ret = ip6_savecontrol(last, n, &opts);
+ if (ret != 0) {
+ m_freem(n);
+ m_freem(opts);
+ last = in6p;
+ continue;
+ }
+ }
/* strip intermediate headers */
m_adj(n, off);
+ so_recv_data_stat(last->in6p_socket, m, 0);
if (sbappendaddr(&last->in6p_socket->so_rcv,
(struct sockaddr *)&rip6src,
n, opts, NULL) != 0) {
}
last = in6p;
}
- lck_rw_done(ripcbinfo.mtx);
if (last) {
- if (last->in6p_flags & IN6P_CONTROLOPTS)
- ip6_savecontrol(last, &opts, ip6, m);
+ if ((last->in6p_flags & INP_CONTROLOPTS) != 0 ||
+ (last->in6p_socket->so_options & SO_TIMESTAMP) != 0 ||
+ (last->in6p_socket->so_options & SO_TIMESTAMP_MONOTONIC) != 0) {
+ ret = ip6_savecontrol(last, m, &opts);
+ if (ret != 0) {
+ goto error;
+ }
+ }
/* strip intermediate headers */
m_adj(m, off);
+ so_recv_data_stat(last->in6p_socket, m, 0);
if (sbappendaddr(&last->in6p_socket->so_rcv,
(struct sockaddr *)&rip6src, m, opts, NULL) != 0) {
sorwakeup(last->in6p_socket);
}
} else {
- m_freem(m);
- ip6stat.ip6s_delivered--;
+ goto error;
}
+ lck_rw_done(ripcbinfo.ipi_lock);
+ return IPPROTO_DONE;
+
+error:
+ lck_rw_done(ripcbinfo.ipi_lock);
+ m_freem(m);
+ m_freem(opts);
+ ip6stat.ip6s_delivered--;
return IPPROTO_DONE;
}
* OFF points to the icmp6 header, counted from the top of the mbuf.
*/
void
-icmp6_reflect(m, off)
- struct mbuf *m;
- size_t off;
+icmp6_reflect(struct mbuf *m, size_t off)
{
+ struct mbuf *m_ip6hdr = m;
struct ip6_hdr *ip6;
struct icmp6_hdr *icmp6;
struct in6_ifaddr *ia;
int type, code;
struct ifnet *outif = NULL;
struct sockaddr_in6 sa6_src, sa6_dst;
-#ifdef COMPAT_RFC1885
- int mtu = IPV6_MMTU;
- struct sockaddr_in6 *sin6 = &icmp6_reflect_rt.ro_dst;
-#endif
+ struct nd_ifinfo *ndi = NULL;
+ u_int32_t oflow;
+ struct ip6_out_args ip6oa = { IFSCOPE_NONE, { 0 },
+ IP6OAF_SELECT_SRCIF | IP6OAF_BOUND_SRCADDR |
+ IP6OAF_INTCOPROC_ALLOWED | IP6OAF_AWDL_UNRESTRICTED, 0,
+ SO_TC_UNSPEC, _NET_SERVICE_TYPE_UNSPEC };
+
+ if (!(m->m_pkthdr.pkt_flags & PKTF_LOOP) && m->m_pkthdr.rcvif != NULL) {
+ ip6oa.ip6oa_boundif = m->m_pkthdr.rcvif->if_index;
+ ip6oa.ip6oa_flags |= IP6OAF_BOUND_IF;
+ }
/* too short to reflect */
if (off < sizeof(struct ip6_hdr)) {
nd6log((LOG_DEBUG,
"sanity fail: off=%lx, sizeof(ip6)=%lx in %s:%d\n",
- (u_long)off, (u_long)sizeof(struct ip6_hdr),
+ (u_int32_t)off, (u_int32_t)sizeof(struct ip6_hdr),
__FILE__, __LINE__));
goto bad;
}
* If there are extra headers between IPv6 and ICMPv6, strip
* off that header first.
*/
-#if DIAGNOSTIC
- if (sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr) > MHLEN)
- panic("assumption failed in icmp6_reflect");
-#endif
if (off > sizeof(struct ip6_hdr)) {
size_t l;
struct ip6_hdr nip6;
m_adj(m, l);
l = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr);
if (m->m_len < l) {
- if ((m = m_pullup(m, l)) == NULL)
+ if ((m_ip6hdr = m_pulldown(m, 0, l, NULL)) == NULL)
return;
}
bcopy((caddr_t)&nip6, mtod(m, caddr_t), sizeof(nip6));
size_t l;
l = sizeof(struct ip6_hdr) + sizeof(struct icmp6_hdr);
if (m->m_len < l) {
- if ((m = m_pullup(m, l)) == NULL)
+ if ((m_ip6hdr = m_pulldown(m, 0, l, NULL)) == NULL)
return;
}
}
plen = m->m_pkthdr.len - sizeof(struct ip6_hdr);
- ip6 = mtod(m, struct ip6_hdr *);
+ ip6 = mtod(m_ip6hdr, struct ip6_hdr *);
ip6->ip6_nxt = IPPROTO_ICMPV6;
icmp6 = (struct icmp6_hdr *)(ip6 + 1);
type = icmp6->icmp6_type; /* keep type for statistics */
* XXX: make sure to embed scope zone information, using
* already embedded IDs or the received interface (if any).
* Note that rcvif may be NULL.
- * TODO: scoped routing case (XXX).
*/
bzero(&sa6_src, sizeof(sa6_src));
sa6_src.sin6_family = AF_INET6;
sa6_src.sin6_len = sizeof(sa6_src);
sa6_src.sin6_addr = ip6->ip6_dst;
in6_recoverscope(&sa6_src, &ip6->ip6_dst, m->m_pkthdr.rcvif);
- in6_embedscope(&ip6->ip6_dst, &sa6_src, NULL, NULL);
+ in6_embedscope(&ip6->ip6_dst, &sa6_src, NULL, NULL, NULL);
bzero(&sa6_dst, sizeof(sa6_dst));
sa6_dst.sin6_family = AF_INET6;
sa6_dst.sin6_len = sizeof(sa6_dst);
sa6_dst.sin6_addr = t;
in6_recoverscope(&sa6_dst, &t, m->m_pkthdr.rcvif);
- in6_embedscope(&t, &sa6_dst, NULL, NULL);
+ in6_embedscope(&t, &sa6_dst, NULL, NULL, NULL);
-#ifdef COMPAT_RFC1885
- /*
- * xxx guess MTU
- * RFC 1885 requires that echo reply should be truncated if it
- * does not fit in with (return) path MTU, but the description was
- * removed in the new spec.
- */
- if (icmp6_reflect_rt.ro_rt == 0 ||
- ! (IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, &ip6->ip6_dst))) {
- if (icmp6_reflect_rt.ro_rt) {
- rtfree(icmp6_reflect_rt.ro_rt);
- icmp6_reflect_rt.ro_rt = 0;
- }
- bzero(sin6, sizeof(*sin6));
- sin6->sin6_family = PF_INET6;
- sin6->sin6_len = sizeof(struct sockaddr_in6);
- sin6->sin6_addr = ip6->ip6_dst;
-
- rtalloc_ign((struct route *)&icmp6_reflect_rt.ro_rt,
- RTF_PRCLONING);
- }
-
- if (icmp6_reflect_rt.ro_rt == 0)
- goto bad;
-
- if ((icmp6_reflect_rt.ro_rt->rt_flags & RTF_HOST)
- && mtu < icmp6_reflect_rt.ro_rt->rt_ifp->if_mtu)
- mtu = icmp6_reflect_rt.ro_rt->rt_rmx.rmx_mtu;
-
- if (mtu < m->m_pkthdr.len) {
- plen -= (m->m_pkthdr.len - mtu);
- m_adj(m, mtu - m->m_pkthdr.len);
- }
-#endif
/*
* If the incoming packet was addressed directly to us(i.e. unicast),
* use dst as the src for the reply.
- * The IN6_IFF_NOTREADY case would be VERY rare, but is possible
+ * The IN6_IFF_NOTREADY case should be VERY rare, but is possible
* (for example) when we encounter an error while forwarding procedure
* destined to a duplicated address of ours.
+ * Note that ip6_getdstifaddr() may fail if we are in an error handling
+ * procedure of an outgoing packet of our own, in which case we need
+ * to search in the ifaddr list.
*/
- lck_mtx_lock(nd6_mutex);
- for (ia = in6_ifaddrs; ia; ia = ia->ia_next)
+ lck_rw_lock_shared(&in6_ifaddr_rwlock);
+ for (ia = in6_ifaddrs; ia; ia = ia->ia_next) {
+ IFA_LOCK(&ia->ia_ifa);
if (IN6_ARE_ADDR_EQUAL(&t, &ia->ia_addr.sin6_addr) &&
(ia->ia6_flags & (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY)) == 0) {
+ IFA_UNLOCK(&ia->ia_ifa);
src = &t;
break;
}
- lck_mtx_unlock(nd6_mutex);
- if (ia == NULL && IN6_IS_ADDR_LINKLOCAL(&t) && (m->m_flags & M_LOOP)) {
+ IFA_UNLOCK(&ia->ia_ifa);
+ }
+ lck_rw_done(&in6_ifaddr_rwlock);
+ if (ia == NULL && IN6_IS_ADDR_LINKLOCAL(&t) &&
+ ((m->m_flags & M_LOOP) || (m->m_pkthdr.pkt_flags & PKTF_LOOP))) {
/*
* This is the case if the dst is our link-local address
- * and the sender is also ourselves.
+ * and the sender is also ourselves. Here we test for both
+ * M_LOOP and PKTF_LOOP, since the former may have been set
+ * in ip6_output() and that we get here as part of callling
+ * ip6_process_hopopts(). See comments in <sys/mbuf.h>
*/
src = &t;
}
- if (src == 0) {
+ if (src == NULL) {
int e;
+ struct sockaddr_in6 sin6;
struct route_in6 ro;
/*
* that we do not own. Select a source address based on the
* source address of the erroneous packet.
*/
+ bzero(&sin6, sizeof(sin6));
+ sin6.sin6_family = AF_INET6;
+ sin6.sin6_len = sizeof(sin6);
+ sin6.sin6_addr = ip6->ip6_dst; /* zone ID should be embedded */
+
bzero(&ro, sizeof(ro));
- src = in6_selectsrc(&sa6_src, NULL, NULL, &ro, NULL, &src_storage, &e);
- if (ro.ro_rt)
- rtfree(ro.ro_rt); /* XXX: we could use this */
+ /*
+ * in6_selectsrc() might return outif with its reference held
+ * even in the error case, so we always need to release it
+ * if non-NULL.
+ */
+ src = in6_selectsrc(&sin6, NULL, NULL, &ro, &outif,
+ &src_storage, ip6oa.ip6oa_boundif, &e);
+ ROUTE_RELEASE(&ro);
if (src == NULL) {
nd6log((LOG_DEBUG,
"icmp6_reflect: source can't be determined: "
goto bad;
}
}
-
+ oflow = ip6->ip6_flow; /* Save for later */
ip6->ip6_src = *src;
-
ip6->ip6_flow = 0;
ip6->ip6_vfc &= ~IPV6_VERSION_MASK;
ip6->ip6_vfc |= IPV6_VERSION;
+ if (icmp6->icmp6_type == ICMP6_ECHO_REPLY && icmp6->icmp6_code == 0) {
+ ip6->ip6_flow |= (oflow & htonl(0x0ff00000));
+ }
ip6->ip6_nxt = IPPROTO_ICMPV6;
- if (m->m_pkthdr.rcvif) {
+ if (outif != NULL && (ndi = ND_IFINFO(outif)) != NULL &&
+ ndi->initialized) {
+ lck_mtx_lock(&ndi->lock);
+ ip6->ip6_hlim = ndi->chlim;
+ lck_mtx_unlock(&ndi->lock);
+ }
+ if (m->m_pkthdr.rcvif != NULL &&
+ (ndi = ND_IFINFO(m->m_pkthdr.rcvif)) != NULL &&
+ ndi->initialized) {
/* XXX: This may not be the outgoing interface */
- ip6->ip6_hlim = nd_ifinfo[m->m_pkthdr.rcvif->if_index].chlim;
- } else
+ lck_mtx_lock(&ndi->lock);
+ ip6->ip6_hlim = ndi->chlim;
+ lck_mtx_unlock(&ndi->lock);
+ } else {
ip6->ip6_hlim = ip6_defhlim;
-
+ }
+ /* Use the same traffic class as in the request to match IPv4 */
icmp6->icmp6_cksum = 0;
icmp6->icmp6_cksum = in6_cksum(m, IPPROTO_ICMPV6,
- sizeof(struct ip6_hdr), plen);
+ sizeof(struct ip6_hdr), plen);
/*
* XXX option handling
*/
-
m->m_flags &= ~(M_BCAST|M_MCAST);
-#if IPSEC
- /* Don't lookup socket */
- if (ipsec_bypass == 0)
- (void)ipsec_setsocket(m, NULL);
-#endif /*IPSEC*/
-#ifdef COMPAT_RFC1885
- ip6_output(m, NULL, &icmp6_reflect_rt, 0, NULL, &outif, 0);
-#else
- ip6_output(m, NULL, NULL, 0, NULL, &outif, 0);
-#endif
- if (outif)
- icmp6_ifoutstat_inc(outif, type, code);
+ if (outif != NULL) {
+ ifnet_release(outif);
+ outif = NULL;
+ }
+ m->m_pkthdr.csum_data = 0;
+ m->m_pkthdr.csum_flags = 0;
+ ip6_output(m, NULL, NULL, IPV6_OUTARGS, NULL, &outif, &ip6oa);
+ if (outif != NULL) {
+ icmp6_ifoutstat_inc(outif, type, code);
+ ifnet_release(outif);
+ }
return;
- bad:
+bad:
m_freem(m);
+ if (outif != NULL)
+ ifnet_release(outif);
return;
}
-void
-icmp6_fasttimo()
-{
-
- mld6_fasttimeo();
-}
-
static const char *
-icmp6_redirect_diag(src6, dst6, tgt6)
- struct in6_addr *src6;
- struct in6_addr *dst6;
- struct in6_addr *tgt6;
+icmp6_redirect_diag(struct in6_addr *src6,
+ struct in6_addr *dst6,
+ struct in6_addr *tgt6)
{
static char buf[1024];
snprintf(buf, sizeof(buf), "(src=%s dst=%s tgt=%s)",
}
void
-icmp6_redirect_input(m, off)
- struct mbuf *m;
- int off;
+icmp6_redirect_input(struct mbuf *m, int off)
{
struct ifnet *ifp = m->m_pkthdr.rcvif;
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
if (!m || !ifp)
return;
- /* XXX if we are router, we don't update route by icmp6 redirect */
- if (ip6_forwarding)
+ /*
+ * If we are an advertising router on this interface,
+ * don't update route by icmp6 redirect.
+ */
+ if (ifp->if_eflags & IFEF_IPV6_ROUTER)
goto freeit;
if (!icmp6_rediraccept)
goto freeit;
redtgt6 = nd_rd->nd_rd_target;
reddst6 = nd_rd->nd_rd_dst;
- if (IN6_IS_ADDR_LINKLOCAL(&redtgt6))
- redtgt6.s6_addr16[1] = htons(ifp->if_index);
- if (IN6_IS_ADDR_LINKLOCAL(&reddst6))
- reddst6.s6_addr16[1] = htons(ifp->if_index);
+ if (in6_setscope(&redtgt6, m->m_pkthdr.rcvif, NULL) ||
+ in6_setscope(&reddst6, m->m_pkthdr.rcvif, NULL)) {
+ goto freeit;
+ }
/* validation */
if (!IN6_IS_ADDR_LINKLOCAL(&src6)) {
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(struct sockaddr_in6);
bcopy(&reddst6, &sin6.sin6_addr, sizeof(reddst6));
- rt = rtalloc1((struct sockaddr *)&sin6, 0, 0UL);
+ rt = rtalloc1_scoped((struct sockaddr *)&sin6, 0, 0, ifp->if_index);
if (rt) {
+ RT_LOCK(rt);
if (rt->rt_gateway == NULL ||
rt->rt_gateway->sa_family != AF_INET6) {
nd6log((LOG_ERR,
"ICMP6 redirect rejected; no route "
"with inet6 gateway found for redirect dst: %s\n",
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
+ RT_UNLOCK(rt);
rtfree(rt);
goto bad;
}
- gw6 = &(((struct sockaddr_in6 *)rt->rt_gateway)->sin6_addr);
+ gw6 = &(((struct sockaddr_in6 *)(void *)
+ rt->rt_gateway)->sin6_addr);
if (bcmp(&src6, gw6, sizeof(struct in6_addr)) != 0) {
nd6log((LOG_ERR,
"ICMP6 redirect rejected; "
"%s\n",
ip6_sprintf(gw6),
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
+ RT_UNLOCK(rt);
rtfree(rt);
goto bad;
}
icmp6_redirect_diag(&src6, &reddst6, &redtgt6)));
goto bad;
}
+ RT_UNLOCK(rt);
rtfree(rt);
rt = NULL;
}
bcopy(&redtgt6, &sgw.sin6_addr, sizeof(struct in6_addr));
bcopy(&reddst6, &sdst.sin6_addr, sizeof(struct in6_addr));
bcopy(&src6, &ssrc.sin6_addr, sizeof(struct in6_addr));
- rtredirect((struct sockaddr *)&sdst, (struct sockaddr *)&sgw,
- (struct sockaddr *)NULL, RTF_GATEWAY | RTF_HOST,
- (struct sockaddr *)&ssrc,
- (struct rtentry **)NULL);
+ rtredirect(ifp, (struct sockaddr *)&sdst,
+ (struct sockaddr *)&sgw, NULL, RTF_GATEWAY | RTF_HOST,
+ (struct sockaddr *)&ssrc, NULL);
}
/* finally update cached route in each socket via pfctlinput */
{
sdst.sin6_family = AF_INET6;
sdst.sin6_len = sizeof(struct sockaddr_in6);
bcopy(&reddst6, &sdst.sin6_addr, sizeof(struct in6_addr));
+
pfctlinput(PRC_REDIRECT_HOST, (struct sockaddr *)&sdst);
#if IPSEC
key_sa_routechange((struct sockaddr *)&sdst);
}
void
-icmp6_redirect_output(m0, rt)
- struct mbuf *m0;
- struct rtentry *rt;
+icmp6_redirect_output(struct mbuf *m0, struct rtentry *rt)
{
struct ifnet *ifp; /* my outgoing interface */
struct in6_addr ifp_ll6;
u_char *p;
struct ifnet *outif = NULL;
struct sockaddr_in6 src_sa;
+ struct ip6_out_args ip6oa = { IFSCOPE_NONE, { 0 },
+ IP6OAF_SELECT_SRCIF | IP6OAF_BOUND_SRCADDR, 0,
+ SO_TC_UNSPEC, _NET_SERVICE_TYPE_UNSPEC };
icmp6_errcount(&icmp6stat.icp6s_outerrhist, ND_REDIRECT, 0);
+ if (rt != NULL)
+ RT_LOCK(rt);
+
/* sanity check */
if (!m0 || !rt || !(rt->rt_flags & RTF_UP) || !(ifp = rt->rt_ifp))
goto fail;
- /* if we are not router, we don't send icmp6 redirect */
- if (!ip6_forwarding || ip6_accept_rtadv || (ifp->if_eflags & IFEF_ACCEPT_RTADVD))
+ /*
+ * If we are not a router to begin with, or not an advertising
+ * router on this interface, don't send icmp6 redirect.
+ */
+ if (!ip6_forwarding || !(ifp->if_eflags & IFEF_IPV6_ROUTER))
goto fail;
/*
src_sa.sin6_addr = sip6->ip6_src;
/* we don't currently use sin6_scope_id, but eventually use it */
src_sa.sin6_scope_id = in6_addr2scopeid(ifp, &sip6->ip6_src);
- if (nd6_is_addr_neighbor(&src_sa, ifp, 0) == 0)
+ RT_UNLOCK(rt);
+ if (nd6_is_addr_neighbor(&src_sa, ifp, 0) == 0) {
+ /* already unlocked */
+ rt = NULL;
goto fail;
+ }
+ RT_LOCK(rt);
if (IN6_IS_ADDR_MULTICAST(&sip6->ip6_dst))
goto fail; /* what should we do here? */
IN6_IFF_NOTREADY|
IN6_IFF_ANYCAST)) == NULL)
goto fail;
+ IFA_LOCK(&ia->ia_ifa);
ifp_ll6 = ia->ia_addr.sin6_addr;
- ifafree(&ia->ia_ifa);
+ IFA_UNLOCK(&ia->ia_ifa);
+ IFA_REMREF(&ia->ia_ifa);
}
/* get ip6 linklocal address for the router. */
if (rt->rt_gateway && (rt->rt_flags & RTF_GATEWAY)) {
struct sockaddr_in6 *sin6;
- sin6 = (struct sockaddr_in6 *)rt->rt_gateway;
+ sin6 = (struct sockaddr_in6 *)(void *)rt->rt_gateway;
router_ll6 = &sin6->sin6_addr;
if (!IN6_IS_ADDR_LINKLOCAL(router_ll6))
router_ll6 = (struct in6_addr *)NULL;
bcopy(&sip6->ip6_dst, &nd_rd->nd_rd_dst,
sizeof(nd_rd->nd_rd_dst));
}
+ RT_UNLOCK(rt);
+ rt = NULL;
p = (u_char *)(nd_rd + 1);
if (!router_ll6)
goto nolladdropt;
- {
- /* target lladdr option */
- struct rtentry *rt_router = NULL;
- int len;
- struct sockaddr_dl *sdl;
- struct nd_opt_hdr *nd_opt;
- char *lladdr;
+ {
+ /* target lladdr option */
+ struct rtentry *rt_router = NULL;
+ int len;
+ struct sockaddr_dl *sdl;
+ struct nd_opt_hdr *nd_opt;
+ char *lladdr;
+
+ /* Callee returns a locked route upon success */
+ rt_router = nd6_lookup(router_ll6, 0, ifp, 0);
+ if (!rt_router)
+ goto nolladdropt;
+ RT_LOCK_ASSERT_HELD(rt_router);
+ len = sizeof(*nd_opt) + ifp->if_addrlen;
+ len = (len + 7) & ~7; /* round by 8 */
+ /* safety check */
+ if (len + (p - (u_char *)ip6) > maxlen) {
+ RT_REMREF_LOCKED(rt_router);
+ RT_UNLOCK(rt_router);
+ goto nolladdropt;
+ }
- rt_router = nd6_lookup(router_ll6, 0, ifp, 0);
- if (!rt_router)
- goto nolladdropt;
- len = sizeof(*nd_opt) + ifp->if_addrlen;
- len = (len + 7) & ~7; /* round by 8 */
- /* safety check */
- if (len + (p - (u_char *)ip6) > maxlen)
- goto nolladdropt;
- if (!(rt_router->rt_flags & RTF_GATEWAY) &&
- (rt_router->rt_flags & RTF_LLINFO) &&
- (rt_router->rt_gateway->sa_family == AF_LINK) &&
- (sdl = (struct sockaddr_dl *)rt_router->rt_gateway) &&
- sdl->sdl_alen) {
- nd_opt = (struct nd_opt_hdr *)p;
- nd_opt->nd_opt_type = ND_OPT_TARGET_LINKADDR;
- nd_opt->nd_opt_len = len >> 3;
- lladdr = (char *)(nd_opt + 1);
- bcopy(LLADDR(sdl), lladdr, ifp->if_addrlen);
- p += len;
+ if (!(rt_router->rt_flags & RTF_GATEWAY) &&
+ (rt_router->rt_flags & RTF_LLINFO) &&
+ (rt_router->rt_gateway->sa_family == AF_LINK) &&
+ (sdl = (struct sockaddr_dl *)(void *)
+ rt_router->rt_gateway) && sdl->sdl_alen) {
+ nd_opt = (struct nd_opt_hdr *)p;
+ nd_opt->nd_opt_type = ND_OPT_TARGET_LINKADDR;
+ nd_opt->nd_opt_len = len >> 3;
+ lladdr = (char *)(nd_opt + 1);
+ bcopy(LLADDR(sdl), lladdr, ifp->if_addrlen);
+ p += len;
+ }
+ RT_REMREF_LOCKED(rt_router);
+ RT_UNLOCK(rt_router);
}
- }
+
nolladdropt:;
m->m_pkthdr.len = m->m_len = p - (u_char *)ip6;
}
noredhdropt:;
- if (IN6_IS_ADDR_LINKLOCAL(&sip6->ip6_src))
- sip6->ip6_src.s6_addr16[1] = 0;
- if (IN6_IS_ADDR_LINKLOCAL(&sip6->ip6_dst))
- sip6->ip6_dst.s6_addr16[1] = 0;
-#if 0
- if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_src))
- ip6->ip6_src.s6_addr16[1] = 0;
- if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst))
- ip6->ip6_dst.s6_addr16[1] = 0;
-#endif
- if (IN6_IS_ADDR_LINKLOCAL(&nd_rd->nd_rd_target))
- nd_rd->nd_rd_target.s6_addr16[1] = 0;
- if (IN6_IS_ADDR_LINKLOCAL(&nd_rd->nd_rd_dst))
- nd_rd->nd_rd_dst.s6_addr16[1] = 0;
+ /* XXX: clear embedded link IDs in the inner header */
+ in6_clearscope(&sip6->ip6_src);
+ in6_clearscope(&sip6->ip6_dst);
+ in6_clearscope(&nd_rd->nd_rd_target);
+ in6_clearscope(&nd_rd->nd_rd_dst);
ip6->ip6_plen = htons(m->m_pkthdr.len - sizeof(struct ip6_hdr));
= in6_cksum(m, IPPROTO_ICMPV6, sizeof(*ip6), ntohs(ip6->ip6_plen));
/* send the packet to outside... */
-#if IPSEC
- /* Don't lookup socket */
- if (ipsec_bypass == 0)
- (void)ipsec_setsocket(m, NULL);
-#endif /*IPSEC*/
- ip6_output(m, NULL, NULL, 0, NULL, &outif, 0);
+ ip6oa.ip6oa_boundif = ifp->if_index;
+ ip6oa.ip6oa_flags |= IP6OAF_BOUND_IF;
+
+ ip6_output(m, NULL, NULL, IPV6_OUTARGS, NULL, &outif, &ip6oa);
if (outif) {
icmp6_ifstat_inc(outif, ifs6_out_msg);
icmp6_ifstat_inc(outif, ifs6_out_redirect);
+ ifnet_release(outif);
}
icmp6stat.icp6s_outhist[ND_REDIRECT]++;
return;
fail:
+ if (rt != NULL)
+ RT_UNLOCK(rt);
if (m)
m_freem(m);
if (m0)
m_freem(m0);
}
-#if HAVE_NRL_INPCB
-#define sotoin6pcb sotoinpcb
-#define in6pcb inpcb
-#define in6p_icmp6filt inp_icmp6filt
-#endif
/*
* ICMPv6 socket option processing.
*/
int
-icmp6_ctloutput(so, sopt)
- struct socket *so;
- struct sockopt *sopt;
+icmp6_ctloutput(struct socket *so, struct sockopt *sopt)
{
int error = 0;
int optlen;
{
struct icmp6_filter *p;
- if (optlen != sizeof(*p)) {
+ if (optlen != 0 && optlen != sizeof(*p)) {
error = EMSGSIZE;
break;
}
error = EINVAL;
break;
}
- error = sooptcopyin(sopt, inp->in6p_icmp6filt, optlen,
- optlen);
+
+ if (optlen == 0) {
+ /* According to RFC 3542, an installed filter can be
+ * cleared by issuing a setsockopt for ICMP6_FILTER
+ * with a zero length.
+ */
+ ICMP6_FILTER_SETPASSALL(inp->in6p_icmp6filt);
+ } else {
+ error = sooptcopyin(sopt, inp->in6p_icmp6filt, optlen,
+ optlen);
+ }
break;
}
break;
}
error = sooptcopyout(sopt, inp->in6p_icmp6filt,
- sizeof(struct icmp6_filter));
+ min(sizeof(struct icmp6_filter), optlen));
break;
}
return(error);
}
-#if HAVE_NRL_INPCB
-#undef sotoin6pcb
-#undef in6pcb
-#undef in6p_icmp6filt
-#endif
/*
* ICMPv6 socket datagram option processing.
int
icmp6_dgram_ctloutput(struct socket *so, struct sockopt *sopt)
{
- if (so->so_uid == 0)
+ if (kauth_cred_issuser(so->so_cred))
return icmp6_ctloutput(so, sopt);
if (sopt->sopt_level == IPPROTO_ICMPV6) {
return EPERM;
}
}
-
+
if (sopt->sopt_level != IPPROTO_IPV6)
return EINVAL;
-
+
switch (sopt->sopt_name) {
- case IPV6_PKTOPTIONS:
case IPV6_UNICAST_HOPS:
case IPV6_CHECKSUM:
- case IPV6_FAITH:
case IPV6_V6ONLY:
+ case IPV6_USE_MIN_MTU:
+ case IPV6_RECVRTHDR:
+ case IPV6_RECVPKTINFO:
+ case IPV6_RECVHOPLIMIT:
+ case IPV6_PATHMTU:
case IPV6_PKTINFO:
case IPV6_HOPLIMIT:
case IPV6_HOPOPTS:
case IPV6_DSTOPTS:
- case IPV6_RTHDR:
case IPV6_MULTICAST_IF:
case IPV6_MULTICAST_HOPS:
case IPV6_MULTICAST_LOOP:
case IPV6_LEAVE_GROUP:
case IPV6_PORTRANGE:
case IPV6_IPSEC_POLICY:
+ case IPV6_RECVTCLASS:
+ case IPV6_TCLASS:
+ case IPV6_2292PKTOPTIONS:
+ case IPV6_2292PKTINFO:
+ case IPV6_2292HOPLIMIT:
+ case IPV6_2292HOPOPTS:
+ case IPV6_2292DSTOPTS:
+ case IPV6_2292RTHDR:
+ case IPV6_BOUND_IF:
+ case IPV6_NO_IFT_CELLULAR:
+
return ip6_ctloutput(so, sopt);
-
+
default:
return EPERM;
-
-
}
}
__private_extern__ int
-icmp6_dgram_send(struct socket *so, __unused int flags, struct mbuf *m, struct sockaddr *nam,
- struct mbuf *control, __unused struct proc *p)
+icmp6_dgram_send(struct socket *so, int flags, struct mbuf *m,
+ struct sockaddr *nam, struct mbuf *control, struct proc *p)
{
+#pragma unused(flags, p)
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct sockaddr_in6 tmp;
- struct sockaddr_in6 *dst;
+ struct sockaddr_in6 *dst = (struct sockaddr_in6 *)(void *)nam;
struct icmp6_hdr *icmp6;
- if (so->so_uid == 0)
- return rip6_output(m, so, (struct sockaddr_in6 *) nam, control);
+ if (inp == NULL
+#if NECP
+ || (necp_socket_should_use_flow_divert(inp))
+#endif /* NECP */
+ ) {
+ error = (inp == NULL ? EINVAL : EPROTOTYPE);
+ goto bad;
+ }
+
+ if (kauth_cred_issuser(so->so_cred))
+ return (rip6_output(m, so, SIN6(nam), control, 0));
/* always copy sockaddr to avoid overwrites */
if (so->so_state & SS_ISCONNECTED) {
- if (nam) {
- m_freem(m);
- return EISCONN;
+ if (nam != NULL) {
+ error = EISCONN;
+ goto bad;
}
/* XXX */
bzero(&tmp, sizeof(tmp));
dst = &tmp;
} else {
if (nam == NULL) {
- m_freem(m);
- return ENOTCONN;
+ error = ENOTCONN;
+ goto bad;
}
- tmp = *(struct sockaddr_in6 *)nam;
+ tmp = *(struct sockaddr_in6 *)(void *)nam;
dst = &tmp;
}
/*
* For an ICMPv6 packet, we should know its type and code
*/
- if (so->so_proto->pr_protocol == IPPROTO_ICMPV6) {
+ if (SOCK_PROTO(so) == IPPROTO_ICMPV6) {
if (m->m_len < sizeof(struct icmp6_hdr) &&
(m = m_pullup(m, sizeof(struct icmp6_hdr))) == NULL) {
error = ENOBUFS;
goto bad;
}
icmp6 = mtod(m, struct icmp6_hdr *);
-
+
/*
- * Allow only to send echo request type 128 with code 0
+ * Allow only to send echo request and node information request
* See RFC 2463 for Echo Request Message format
*/
- if (icmp6->icmp6_type != 128 || icmp6->icmp6_code != 0) {
+ if ((icmp6->icmp6_type == ICMP6_ECHO_REQUEST &&
+ icmp6->icmp6_code == 0) ||
+ (icmp6->icmp6_type == ICMP6_NI_QUERY &&
+ (icmp6->icmp6_code == ICMP6_NI_SUBJ_IPV6 ||
+ icmp6->icmp6_code == ICMP6_NI_SUBJ_FQDN))) {
+ /* Good */
+ ;
+ } else {
error = EPERM;
goto bad;
}
#if ENABLE_DEFAULT_SCOPE
if (dst->sin6_scope_id == 0) { /* not change if specified */
- dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
+ dst->sin6_scope_id = scope6_addr2default(&dst->sin6_addr);
}
#endif
- return rip6_output(m, so, (struct sockaddr_in6 *) nam, control);
+ return (rip6_output(m, so, dst, control, 0));
bad:
- m_freem(m);
- return error;
+ VERIFY(error != 0);
+
+ if (m != NULL)
+ m_freem(m);
+ if (control != NULL)
+ m_freem(control);
+
+ return (error);
}
/* Like rip6_attach but without root privilege enforcement */
inp = sotoinpcb(so);
if (inp)
panic("icmp6_dgram_attach");
-
+
if (proto != IPPROTO_ICMPV6)
return EINVAL;
-
+
error = soreserve(so, rip_sendspace, rip_recvspace);
if (error)
return error;
}
-
-#ifndef HAVE_PPSRATECHECK
-#ifndef timersub
-#define timersub(tvp, uvp, vvp) \
- do { \
- (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
- (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
- if ((vvp)->tv_usec < 0) { \
- (vvp)->tv_sec--; \
- (vvp)->tv_usec += 1000000; \
- } \
- } while (0)
-#endif
-
-/*
- * ppsratecheck(): packets (or events) per second limitation.
- */
-static int
-ppsratecheck(lasttime, curpps, maxpps)
- struct timeval *lasttime;
- int *curpps;
- int maxpps; /* maximum pps allowed */
-{
- struct timeval tv, delta;
- int rv;
-
- microtime(&tv);
-
- timersub(&tv, lasttime, &delta);
-
- /*
- * Check for 0,0 so that the message will be seen at least once.
- * If more than one second has passed since the last update of
- * lasttime, reset the counter.
- *
- * we do increment *curpps even in *curpps < maxpps case, as some may
- * try to use *curpps for stat purposes as well.
- */
- if ((lasttime->tv_sec == 0 && lasttime->tv_usec == 0) ||
- delta.tv_sec >= 1) {
- *lasttime = tv;
- *curpps = 0;
- rv = 1;
- } else if (maxpps < 0)
- rv = 1;
- else if (*curpps < maxpps)
- rv = 1;
- else
- rv = 0;
-
-#if 1 /* DIAGNOSTIC? */
- /* be careful about wrap-around */
- if (*curpps + 1 > 0)
- *curpps = *curpps + 1;
-#else
- /*
- * assume that there's not too many calls to this function.
- * not sure if the assumption holds, as it depends on *caller's*
- * behavior, not the behavior of this function.
- * IMHO it is wrong to make assumption on the caller's behavior,
- * so the above #if is #if 1, not #ifdef DIAGNOSTIC.
- */
- *curpps = *curpps + 1;
-#endif
-
- return (rv);
-}
-#endif
-
/*
* Perform rate limit check.
* Returns 0 if it is okay to send the icmp6 packet.
* Returns 1 if the router SHOULD NOT send this icmp6 packet due to rate
* limitation.
*
- * XXX per-destination/type check necessary?
+ * XXX per-destination check necessary?
*/
static int
icmp6_ratelimit(
__unused const struct in6_addr *dst, /* not used at this moment */
- __unused const int type, /* not used at this moment */
- __unused const int code) /* not used at this moment */
+ const int type,
+ __unused const int code)
{
int ret;
ret = 0; /* okay to send */
/* PPS limit */
- if (!ppsratecheck(&icmp6errppslim_last, &icmp6errpps_count,
+ if (type == ND_ROUTER_ADVERT) {
+ if (!ppsratecheck(&icmp6rappslim_last, &icmp6rapps_count,
+ icmp6rappslim))
+ ret++;
+ } else if (!ppsratecheck(&icmp6errppslim_last, &icmp6errpps_count,
icmp6errppslim)) {
/* The packet is subject to rate limit */
ret++;
return ret;
}
-
projects / apple / xnu.git / blobdiff