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	Index: stable/6/sys/conf
	===================================================================
	--- stable/6/sys/conf (revision 180928)
	+++ stable/6/sys/conf (revision 180929)

	Property changes on: stable/6/sys/conf
	___________________________________________________________________
	Modified: svn:mergeinfo
	## -0,0 +0,1 ##
	Merged /head/sys/conf:r178920
	Index: stable/6/sys/kern
	===================================================================
	--- stable/6/sys/kern (revision 180928)
	+++ stable/6/sys/kern (revision 180929)

	Property changes on: stable/6/sys/kern
	___________________________________________________________________
	Modified: svn:mergeinfo
	## -0,0 +0,1 ##
	Merged /head/sys/kern:r178920
	Index: stable/6/sys/modules/bge
	===================================================================
	--- stable/6/sys/modules/bge (revision 180928)
	+++ stable/6/sys/modules/bge (revision 180929)

	Property changes on: stable/6/sys/modules/bge
	___________________________________________________________________
	Modified: svn:mergeinfo
	## -0,0 +0,1 ##
	Merged /head/sys/modules/bge:r178920
	Index: stable/6/sys/net/if_ethersubr.c
	===================================================================
	--- stable/6/sys/net/if_ethersubr.c (revision 180928)
	+++ stable/6/sys/net/if_ethersubr.c (revision 180929)
	@@ -1,1263 +1,1264 @@
	/*-
	* Copyright (c) 1982, 1989, 1993
	* The Regents of the University of California. 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.
	* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
	*
	* @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
	* $FreeBSD$
	*/

	#include "opt_atalk.h"
	#include "opt_inet.h"
	#include "opt_inet6.h"
	#include "opt_ipx.h"
	#include "opt_bdg.h"
	#include "opt_mac.h"
	#include "opt_netgraph.h"
	#include "opt_carp.h"

	#include <sys/param.h>
	#include <sys/systm.h>
	#include <sys/kernel.h>
	#include <sys/mac.h>
	#include <sys/malloc.h>
	#include <sys/module.h>
	#include <sys/mbuf.h>
	#include <sys/random.h>
	#include <sys/socket.h>
	#include <sys/sockio.h>
	#include <sys/sysctl.h>

	#include <net/if.h>
	#include <net/if_arp.h>
	#include <net/netisr.h>
	#include <net/route.h>
	#include <net/if_llc.h>
	#include <net/if_dl.h>
	#include <net/if_types.h>
	#include <net/bpf.h>
	#include <net/ethernet.h>
	#include <net/bridge.h>
	#include <net/if_bridgevar.h>
	#include <net/if_vlan_var.h>

	#if defined(INET) \|\| defined(INET6)
	#include <netinet/in.h>
	#include <netinet/in_var.h>
	#include <netinet/if_ether.h>
	#include <netinet/ip_fw.h>
	#include <netinet/ip_dummynet.h>
	#endif
	#ifdef INET6
	#include <netinet6/nd6.h>
	#endif

	#ifdef DEV_CARP
	#include <netinet/ip_carp.h>
	#endif

	#ifdef IPX
	#include <netipx/ipx.h>
	#include <netipx/ipx_if.h>
	#endif
	int (ef_inputp)(struct ifnet, struct ether_header eh, struct mbuf m);
	int (ef_outputp)(struct ifnet ifp, struct mbuf **mp,
	struct sockaddr dst, short tp, int *hlen);

	#ifdef NETATALK
	#include <netatalk/at.h>
	#include <netatalk/at_var.h>
	#include <netatalk/at_extern.h>

	#define llc_snap_org_code llc_un.type_snap.org_code
	#define llc_snap_ether_type llc_un.type_snap.ether_type

	extern u_char at_org_code[3];
	extern u_char aarp_org_code[3];
	#endif /* NETATALK */

	/* netgraph node hooks for ng_ether(4) */
	void (ng_ether_input_p)(struct ifnet ifp, struct mbuf **mp);
	void (ng_ether_input_orphan_p)(struct ifnet ifp, struct mbuf *m);
	int (ng_ether_output_p)(struct ifnet ifp, struct mbuf **mp);
	void (ng_ether_attach_p)(struct ifnet ifp);
	void (ng_ether_detach_p)(struct ifnet ifp);

	void (vlan_input_p)(struct ifnet , struct mbuf *);

	/* bridge support */
	int do_bridge;
	bridge_in_t *bridge_in_ptr;
	bdg_forward_t *bdg_forward_ptr;
	bdgtakeifaces_t *bdgtakeifaces_ptr;
	struct bdg_softc *ifp2sc;

	struct mbuf (bridge_input_p)(struct ifnet , struct mbuf );
	int (bridge_output_p)(struct ifnet , struct mbuf *,
	struct sockaddr , struct rtentry );
	void (bridge_dn_p)(struct mbuf , struct ifnet *);

	/* if_lagg(4) support */
	struct mbuf (lagg_input_p)(struct ifnet , struct mbuf );

	static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] =
	{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };

	static int ether_resolvemulti(struct ifnet , struct sockaddr *,
	struct sockaddr *);

	/* XXX: should be in an arp support file, not here */
	MALLOC_DEFINE(M_ARPCOM, "arpcom", "802.* interface internals");

	#define senderr(e) do { error = (e); goto bad;} while (0)

	#if defined(INET) \|\| defined(INET6)
	int
	ether_ipfw_chk(struct mbuf *m0, struct ifnet dst,
	struct ip_fw **rule, int shared);
	static int ether_ipfw;
	#endif

	/*
	* Ethernet output routine.
	* Encapsulate a packet of type family for the local net.
	* Use trailer local net encapsulation if enough data in first
	* packet leaves a multiple of 512 bytes of data in remainder.
	*/
	int
	ether_output(struct ifnet ifp, struct mbuf m,
	struct sockaddr dst, struct rtentry rt0)
	{
	short type;
	int error, hdrcmplt = 0;
	u_char esrc[ETHER_ADDR_LEN], edst[ETHER_ADDR_LEN];
	struct ether_header *eh;
	int loop_copy = 1;
	int hlen; /* link layer header length */

	#ifdef MAC
	error = mac_check_ifnet_transmit(ifp, m);
	if (error)
	senderr(error);
	#endif

	if (ifp->if_flags & IFF_MONITOR)
	senderr(ENETDOWN);
	if (!((ifp->if_flags & IFF_UP) &&
	(ifp->if_drv_flags & IFF_DRV_RUNNING)))
	senderr(ENETDOWN);

	hlen = ETHER_HDR_LEN;
	switch (dst->sa_family) {
	#ifdef INET
	case AF_INET:
	error = arpresolve(ifp, rt0, m, dst, edst);
	if (error)
	return (error == EWOULDBLOCK ? 0 : error);
	type = htons(ETHERTYPE_IP);
	break;
	case AF_ARP:
	{
	struct arphdr *ah;
	ah = mtod(m, struct arphdr *);
	ah->ar_hrd = htons(ARPHRD_ETHER);

	loop_copy = 0; /* if this is for us, don't do it */

	switch(ntohs(ah->ar_op)) {
	case ARPOP_REVREQUEST:
	case ARPOP_REVREPLY:
	type = htons(ETHERTYPE_REVARP);
	break;
	case ARPOP_REQUEST:
	case ARPOP_REPLY:
	default:
	type = htons(ETHERTYPE_ARP);
	break;
	}

	if (m->m_flags & M_BCAST)
	bcopy(ifp->if_broadcastaddr, edst, ETHER_ADDR_LEN);
	else
	bcopy(ar_tha(ah), edst, ETHER_ADDR_LEN);

	}
	break;
	#endif
	#ifdef INET6
	case AF_INET6:
	error = nd6_storelladdr(ifp, rt0, m, dst, (u_char *)edst);
	if (error)
	return error;
	type = htons(ETHERTYPE_IPV6);
	break;
	#endif
	#ifdef IPX
	case AF_IPX:
	if (ef_outputp) {
	error = ef_outputp(ifp, &m, dst, &type, &hlen);
	if (error)
	goto bad;
	} else
	type = htons(ETHERTYPE_IPX);
	bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
	(caddr_t)edst, sizeof (edst));
	break;
	#endif
	#ifdef NETATALK
	case AF_APPLETALK:
	{
	struct at_ifaddr *aa;

	if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL)
	senderr(EHOSTUNREACH); /* XXX */
	if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst))
	return (0);
	/*
	* In the phase 2 case, need to prepend an mbuf for the llc header.
	*/
	if ( aa->aa_flags & AFA_PHASE2 ) {
	struct llc llc;

	M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT);
	if (m == NULL)
	senderr(ENOBUFS);
	llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
	llc.llc_control = LLC_UI;
	bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code));
	llc.llc_snap_ether_type = htons( ETHERTYPE_AT );
	bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN);
	type = htons(m->m_pkthdr.len);
	hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN;
	} else {
	type = htons(ETHERTYPE_AT);
	}
	break;
	}
	#endif /* NETATALK */

	case pseudo_AF_HDRCMPLT:
	hdrcmplt = 1;
	eh = (struct ether_header *)dst->sa_data;
	(void)memcpy(esrc, eh->ether_shost, sizeof (esrc));
	/* FALLTHROUGH */

	case AF_UNSPEC:
	loop_copy = 0; /* if this is for us, don't do it */
	eh = (struct ether_header *)dst->sa_data;
	(void)memcpy(edst, eh->ether_dhost, sizeof (edst));
	type = eh->ether_type;
	break;

	default:
	if_printf(ifp, "can't handle af%d\n", dst->sa_family);
	senderr(EAFNOSUPPORT);
	}

	/*
	* Add local net header. If no space in first mbuf,
	* allocate another.
	*/
	M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT);
	if (m == NULL)
	senderr(ENOBUFS);
	eh = mtod(m, struct ether_header *);
	(void)memcpy(&eh->ether_type, &type,
	sizeof(eh->ether_type));
	(void)memcpy(eh->ether_dhost, edst, sizeof (edst));
	if (hdrcmplt)
	(void)memcpy(eh->ether_shost, esrc,
	sizeof(eh->ether_shost));
	else
	(void)memcpy(eh->ether_shost, IFP2ENADDR(ifp),
	sizeof(eh->ether_shost));

	/*
	* If a simplex interface, and the packet is being sent to our
	* Ethernet address or a broadcast address, loopback a copy.
	* XXX To make a simplex device behave exactly like a duplex
	* device, we should copy in the case of sending to our own
	* ethernet address (thus letting the original actually appear
	* on the wire). However, we don't do that here for security
	* reasons and compatibility with the original behavior.
	*/
	if ((ifp->if_flags & IFF_SIMPLEX) && loop_copy &&
	m_tag_find(m, PACKET_TAG_PF_ROUTED, NULL) == NULL) {
	int csum_flags = 0;

	if (m->m_pkthdr.csum_flags & CSUM_IP)
	csum_flags \|= (CSUM_IP_CHECKED\|CSUM_IP_VALID);
	if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA)
	csum_flags \|= (CSUM_DATA_VALID\|CSUM_PSEUDO_HDR);

	if (m->m_flags & M_BCAST) {
	struct mbuf *n;

	if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
	n->m_pkthdr.csum_flags \|= csum_flags;
	if (csum_flags & CSUM_DATA_VALID)
	n->m_pkthdr.csum_data = 0xffff;
	(void)if_simloop(ifp, n, dst->sa_family, hlen);
	} else
	ifp->if_iqdrops++;
	} else if (bcmp(eh->ether_dhost, eh->ether_shost,
	ETHER_ADDR_LEN) == 0) {
	m->m_pkthdr.csum_flags \|= csum_flags;
	if (csum_flags & CSUM_DATA_VALID)
	m->m_pkthdr.csum_data = 0xffff;
	(void) if_simloop(ifp, m, dst->sa_family, hlen);
	return (0); /* XXX */
	}
	}

	/*
	* Bridges require special output handling.
	*/
	if (ifp->if_bridge) {
	BRIDGE_OUTPUT(ifp, m, error);
	return (error);
	}

	#ifdef DEV_CARP
	if (ifp->if_carp &&
	(error = carp_output(ifp, m, dst, NULL)))
	goto bad;
	#endif

	/* Handle ng_ether(4) processing, if any */
	if (IFP2AC(ifp)->ac_netgraph != NULL) {
	if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) {
	bad: if (m != NULL)
	m_freem(m);
	return (error);
	}
	if (m == NULL)
	return (0);
	}

	/* Continue with link-layer output */
	return ether_output_frame(ifp, m);
	}

	/*
	* Ethernet link layer output routine to send a raw frame to the device.
	*
	* This assumes that the 14 byte Ethernet header is present and contiguous
	* in the first mbuf (if BRIDGE'ing).
	*/
	int
	ether_output_frame(struct ifnet ifp, struct mbuf m)
	{
	#if defined(INET) \|\| defined(INET6)
	struct ip_fw *rule = ip_dn_claim_rule(m);
	#else
	void *rule = NULL;
	#endif
	int error;

	if (rule == NULL && BDG_ACTIVE(ifp)) {
	/*
	* Beware, the bridge code notices the null rcvif and
	* uses that identify that it's being called from
	* ether_output as opposd to ether_input. Yech.
	*/
	m->m_pkthdr.rcvif = NULL;
	m = bdg_forward_ptr(m, ifp);
	if (m != NULL)
	m_freem(m);
	return (0);
	}
	#if defined(INET) \|\| defined(INET6)
	if (IPFW_LOADED && ether_ipfw != 0) {
	if (ether_ipfw_chk(&m, ifp, &rule, 0) == 0) {
	if (m) {
	m_freem(m);
	return EACCES; /* pkt dropped */
	} else
	return 0; /* consumed e.g. in a pipe */
	}
	}
	#endif

	/*
	* Queue message on interface, update output statistics if
	* successful, and start output if interface not yet active.
	*/
	IFQ_HANDOFF(ifp, m, error);
	return (error);
	}

	#if defined(INET) \|\| defined(INET6)
	/*
	* ipfw processing for ethernet packets (in and out).
	* The second parameter is NULL from ether_demux, and ifp from
	* ether_output_frame. This section of code could be used from
	* bridge.c as well as long as we use some extra info
	* to distinguish that case from ether_output_frame();
	*/
	int
	ether_ipfw_chk(struct mbuf *m0, struct ifnet dst,
	struct ip_fw **rule, int shared)
	{
	struct ether_header *eh;
	struct ether_header save_eh;
	struct mbuf *m;
	int i;
	struct ip_fw_args args;

	if (*rule != NULL && fw_one_pass)
	return 1; /* dummynet packet, already partially processed */

	/*
	* I need some amt of data to be contiguous, and in case others need
	* the packet (shared==1) also better be in the first mbuf.
	*/
	m = *m0;
	i = min( m->m_pkthdr.len, max_protohdr);
	if ( shared \|\| m->m_len < i) {
	m = m_pullup(m, i);
	if (m == NULL) {
	*m0 = m;
	return 0;
	}
	}
	eh = mtod(m, struct ether_header *);
	save_eh = eh; / save copy for restore below */
	m_adj(m, ETHER_HDR_LEN); /* strip ethernet header */

	args.m = m; /* the packet we are looking at */
	args.oif = dst; /* destination, if any */
	args.rule = rule; / matching rule to restart */
	args.next_hop = NULL; /* we do not support forward yet */
	args.eh = &save_eh; /* MAC header for bridged/MAC packets */
	args.inp = NULL; /* used by ipfw uid/gid/jail rules */
	i = ip_fw_chk_ptr(&args);
	m = args.m;
	if (m != NULL) {
	/*
	* Restore Ethernet header, as needed, in case the
	* mbuf chain was replaced by ipfw.
	*/
	M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT);
	if (m == NULL) {
	*m0 = m;
	return 0;
	}
	if (eh != mtod(m, struct ether_header *))
	bcopy(&save_eh, mtod(m, struct ether_header *),
	ETHER_HDR_LEN);
	}
	*m0 = m;
	*rule = args.rule;

	if (i == IP_FW_DENY) /* drop */
	return 0;

	KASSERT(m != NULL, ("ether_ipfw_chk: m is NULL"));

	if (i == IP_FW_PASS) /* a PASS rule. */
	return 1;

	if (DUMMYNET_LOADED && (i == IP_FW_DUMMYNET)) {
	/*
	* Pass the pkt to dummynet, which consumes it.
	* If shared, make a copy and keep the original.
	*/
	if (shared) {
	m = m_copypacket(m, M_DONTWAIT);
	if (m == NULL)
	return 0;
	} else {
	/*
	* Pass the original to dummynet and
	* nothing back to the caller
	*/
	*m0 = NULL ;
	}
	ip_dn_io_ptr(&m, dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args);
	return 0;
	}
	/*
	* XXX at some point add support for divert/forward actions.
	* If none of the above matches, we have to drop the pkt.
	*/
	return 0;
	}
	#endif

	/*
	* Process a received Ethernet packet; the packet is in the
	* mbuf chain m with the ethernet header at the front.
	*/
	static void
	ether_input(struct ifnet ifp, struct mbuf m)
	{
	struct ether_header *eh;
	u_short etype;

	/*
	* Do consistency checks to verify assumptions
	* made by code past this point.
	*/
	if ((m->m_flags & M_PKTHDR) == 0) {
	if_printf(ifp, "discard frame w/o packet header\n");
	ifp->if_ierrors++;
	m_freem(m);
	return;
	}
	if (m->m_len < ETHER_HDR_LEN) {
	/* XXX maybe should pullup? */
	if_printf(ifp, "discard frame w/o leading ethernet "
	"header (len %u pkt len %u)\n",
	m->m_len, m->m_pkthdr.len);
	ifp->if_ierrors++;
	m_freem(m);
	return;
	}
	eh = mtod(m, struct ether_header *);
	etype = ntohs(eh->ether_type);
	if (m->m_pkthdr.rcvif == NULL) {
	if_printf(ifp, "discard frame w/o interface pointer\n");
	ifp->if_ierrors++;
	m_freem(m);
	return;
	}
	#ifdef DIAGNOSTIC
	if (m->m_pkthdr.rcvif != ifp) {
	if_printf(ifp, "Warning, frame marked as received on %s\n",
	m->m_pkthdr.rcvif->if_xname);
	}
	#endif

	#ifdef MAC
	/*
	* Tag the mbuf with an appropriate MAC label before any other
	* consumers can get to it.
	*/
	mac_create_mbuf_from_ifnet(ifp, m);
	#endif

	/*
	* Give bpf a chance at the packet.
	*/
	ETHER_BPF_MTAP(ifp, m);

	/* If the CRC is still on the packet, trim it off. */
	if (m->m_flags & M_HASFCS) {
	m_adj(m, -ETHER_CRC_LEN);
	m->m_flags &= ~M_HASFCS;
	}

	ifp->if_ibytes += m->m_pkthdr.len;

	if (ifp->if_flags & IFF_MONITOR) {
	/*
	* Interface marked for monitoring; discard packet.
	*/
	m_freem(m);
	return;
	}

	/* Handle input from a lagg(4) port */
	if (ifp->if_type == IFT_IEEE8023ADLAG) {
	KASSERT(lagg_input_p != NULL,
	("%s: if_lagg not loaded!", __func__));
	m = (*lagg_input_p)(ifp, m);
	if (m != NULL)
	ifp = m->m_pkthdr.rcvif;
	else
	return;
	}

	/* Handle ng_ether(4) processing, if any */
	if (IFP2AC(ifp)->ac_netgraph != NULL) {
	(*ng_ether_input_p)(ifp, &m);
	if (m == NULL)
	return;
	}

	/*
	* Tap the packet off here for a bridge. bridge_input()
	* will return NULL if it has consumed the packet, otherwise
	* it gets processed as normal. Note that bridge_input()
	* will always return the original packet if we need to
	* process it locally.
	*/
	if (ifp->if_bridge) {
	BRIDGE_INPUT(ifp, m);
	if (m == NULL)
	return;
	}

	/* Check for bridging mode */
	if (BDG_ACTIVE(ifp) )
	if ((m = bridge_in_ptr(ifp, m)) == NULL)
	return;

	/* First chunk of an mbuf contains good entropy */
	if (harvest.ethernet)
	random_harvest(m, 16, 3, 0, RANDOM_NET);
	ether_demux(ifp, m);
	}

	/*
	* Upper layer processing for a received Ethernet packet.
	*/
	void
	ether_demux(struct ifnet ifp, struct mbuf m)
	{
	struct ether_header *eh;
	int isr;
	u_short ether_type;
	#if defined(NETATALK)
	struct llc *l;
	#endif
	#if defined(INET) \|\| defined(INET6)
	struct ip_fw *rule = ip_dn_claim_rule(m);
	#endif

	KASSERT(ifp != NULL, ("ether_demux: NULL interface pointer"));

	eh = mtod(m, struct ether_header *);
	ether_type = ntohs(eh->ether_type);

	#if defined(INET) \|\| defined(INET6)
	if (rule) /* packet was already bridged */
	goto post_stats;
	#endif

	if (!(BDG_ACTIVE(ifp)) && !(ifp->if_bridge) &&
	!((ether_type == ETHERTYPE_VLAN \|\| m->m_flags & M_VLANTAG) &&
	ifp->if_nvlans > 0)) {
	#ifdef DEV_CARP
	/*
	* XXX: Okay, we need to call carp_forus() and - if it is for
	* us jump over code that does the normal check
	* "IFP2ENADDR(ifp) == ether_dhost". The check sequence is a bit
	* different from OpenBSD, so we jump over as few code as
	* possible, to catch _all_ sanity checks. This needs
	* evaluation, to see if the carp ether_dhost values break any
	* of these checks!
	*/
	if (ifp->if_carp && carp_forus(ifp->if_carp, eh->ether_dhost))
	goto pre_stats;
	#endif
	/*
	* Discard packet if upper layers shouldn't see it because it
	* was unicast to a different Ethernet address. If the driver
	* is working properly, then this situation can only happen
	* when the interface is in promiscuous mode.
	*
	* If VLANs are active, and this packet has a VLAN tag, do
	* not drop it here but pass it on to the VLAN layer, to
	* give them a chance to consider it as well (e. g. in case
	* bridging is only active on a VLAN). They will drop it if
	* it's undesired.
	*/
	if ((ifp->if_flags & IFF_PROMISC) != 0
	&& !ETHER_IS_MULTICAST(eh->ether_dhost)
	&& bcmp(eh->ether_dhost,
	IFP2ENADDR(ifp), ETHER_ADDR_LEN) != 0
	&& (ifp->if_flags & IFF_PPROMISC) == 0) {
	m_freem(m);
	return;
	}
	}

	#ifdef DEV_CARP
	pre_stats:
	#endif
	/* Discard packet if interface is not up */
	if ((ifp->if_flags & IFF_UP) == 0) {
	m_freem(m);
	return;
	}
	if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
	if (bcmp(etherbroadcastaddr, eh->ether_dhost,
	sizeof(etherbroadcastaddr)) == 0)
	m->m_flags \|= M_BCAST;
	else
	m->m_flags \|= M_MCAST;
	}
	if (m->m_flags & (M_BCAST\|M_MCAST))
	ifp->if_imcasts++;

	#if defined(INET) \|\| defined(INET6)
	post_stats:
	if (IPFW_LOADED && ether_ipfw != 0) {
	if (ether_ipfw_chk(&m, NULL, &rule, 0) == 0) {
	if (m)
	m_freem(m);
	return;
	}
	}
	#endif

	/*
	* Check to see if the device performed the VLAN decapsulation and
	* provided us with the tag.
	*/
	if (m->m_flags & M_VLANTAG) {
	/*
	* If no VLANs are configured, drop.
	*/
	if (ifp->if_nvlans == 0) {
	ifp->if_noproto++;
	m_freem(m);
	return;
	}
	/*
	* vlan_input() will either recursively call ether_input()
	* or drop the packet.
	*/
	KASSERT(vlan_input_p != NULL,("ether_input: VLAN not loaded!"));
	(*vlan_input_p)(ifp, m);
	return;
	}

	/*
	* Handle protocols that expect to have the Ethernet header
	* (and possibly FCS) intact.
	*/
	switch (ether_type) {
	case ETHERTYPE_VLAN:
	if (ifp->if_nvlans != 0) {
	KASSERT(vlan_input_p,("ether_input: VLAN not loaded!"));
	(*vlan_input_p)(ifp, m);
	} else {
	ifp->if_noproto++;
	m_freem(m);
	}
	return;
	}

	/* Strip off Ethernet header. */
	m_adj(m, ETHER_HDR_LEN);

	/* If the CRC is still on the packet, trim it off. */
	if (m->m_flags & M_HASFCS) {
	m_adj(m, -ETHER_CRC_LEN);
	m->m_flags &= ~M_HASFCS;
	}

	switch (ether_type) {
	#ifdef INET
	case ETHERTYPE_IP:
	if (ip_fastforward(m))
	return;
	isr = NETISR_IP;
	break;

	case ETHERTYPE_ARP:
	if (ifp->if_flags & IFF_NOARP) {
	/* Discard packet if ARP is disabled on interface */
	m_freem(m);
	return;
	}
	isr = NETISR_ARP;
	break;
	#endif
	#ifdef IPX
	case ETHERTYPE_IPX:
	if (ef_inputp && ef_inputp(ifp, eh, m) == 0)
	return;
	isr = NETISR_IPX;
	break;
	#endif
	#ifdef INET6
	case ETHERTYPE_IPV6:
	isr = NETISR_IPV6;
	break;
	#endif
	#ifdef NETATALK
	case ETHERTYPE_AT:
	isr = NETISR_ATALK1;
	break;
	case ETHERTYPE_AARP:
	isr = NETISR_AARP;
	break;
	#endif /* NETATALK */
	default:
	#ifdef IPX
	if (ef_inputp && ef_inputp(ifp, eh, m) == 0)
	return;
	#endif /* IPX */
	#if defined(NETATALK)
	if (ether_type > ETHERMTU)
	goto discard;
	l = mtod(m, struct llc *);
	if (l->llc_dsap == LLC_SNAP_LSAP &&
	l->llc_ssap == LLC_SNAP_LSAP &&
	l->llc_control == LLC_UI) {
	if (bcmp(&(l->llc_snap_org_code)[0], at_org_code,
	sizeof(at_org_code)) == 0 &&
	ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) {
	m_adj(m, LLC_SNAPFRAMELEN);
	isr = NETISR_ATALK2;
	break;
	}
	if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code,
	sizeof(aarp_org_code)) == 0 &&
	ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) {
	m_adj(m, LLC_SNAPFRAMELEN);
	isr = NETISR_AARP;
	break;
	}
	}
	#endif /* NETATALK */
	goto discard;
	}
	netisr_dispatch(isr, m);
	return;

	discard:
	/*
	* Packet is to be discarded. If netgraph is present,
	* hand the packet to it for last chance processing;
	* otherwise dispose of it.
	*/
	if (IFP2AC(ifp)->ac_netgraph != NULL) {
	/*
	* Put back the ethernet header so netgraph has a
	* consistent view of inbound packets.
	*/
	M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT);
	(*ng_ether_input_orphan_p)(ifp, m);
	return;
	}
	m_freem(m);
	}

	/*
	* Convert Ethernet address to printable (loggable) representation.
	* This routine is for compatibility; it's better to just use
	*
	* printf("%6D", <pointer to address>, ":");
	*
	* since there's no static buffer involved.
	*/
	char *
	ether_sprintf(const u_char *ap)
	{
	static char etherbuf[18];
	snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":");
	return (etherbuf);
	}

	/*
	* Perform common duties while attaching to interface list
	*/
	void
	ether_ifattach(struct ifnet ifp, const u_int8_t llc)
	{
	int i;
	struct ifaddr *ifa;
	struct sockaddr_dl *sdl;

	ifp->if_addrlen = ETHER_ADDR_LEN;
	ifp->if_hdrlen = ETHER_HDR_LEN;
	if_attach(ifp);
	ifp->if_mtu = ETHERMTU;
	ifp->if_output = ether_output;
	ifp->if_input = ether_input;
	ifp->if_resolvemulti = ether_resolvemulti;
	if (ifp->if_baudrate == 0)
	ifp->if_baudrate = IF_Mbps(10); /* just a default */
	ifp->if_broadcastaddr = etherbroadcastaddr;

	ifa = ifaddr_byindex(ifp->if_index);
	KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
	sdl = (struct sockaddr_dl *)ifa->ifa_addr;
	sdl->sdl_type = IFT_ETHER;
	sdl->sdl_alen = ifp->if_addrlen;
	bcopy(llc, LLADDR(sdl), ifp->if_addrlen);
	/*
	* XXX: This doesn't belong here; we do it until
	* XXX: all drivers are cleaned up
	*/
	if (llc != IFP2ENADDR(ifp))
	bcopy(llc, IFP2ENADDR(ifp), ifp->if_addrlen);

	bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN);
	if (ng_ether_attach_p != NULL)
	(*ng_ether_attach_p)(ifp);
	if (BDG_LOADED)
	bdgtakeifaces_ptr();

	/* Announce Ethernet MAC address if non-zero. */
	for (i = 0; i < ifp->if_addrlen; i++)
	if (llc[i] != 0)
	break;
	if (i != ifp->if_addrlen)
	if_printf(ifp, "Ethernet address: %6D\n", llc, ":");
	if (debug_mpsafenet && (ifp->if_flags & IFF_NEEDSGIANT) != 0)
	if_printf(ifp, "if_start running deferred for Giant\n");
	}

	/*
	* Perform common duties while detaching an Ethernet interface
	*/
	void
	ether_ifdetach(struct ifnet *ifp)
	{
	if (IFP2AC(ifp)->ac_netgraph != NULL)
	(*ng_ether_detach_p)(ifp);

	bpfdetach(ifp);
	if_detach(ifp);
	if (BDG_LOADED)
	bdgtakeifaces_ptr();
	}

	SYSCTL_DECL(_net_link);
	SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");
	#if defined(INET) \|\| defined(INET6)
	SYSCTL_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW,
	&ether_ipfw,0,"Pass ether pkts through firewall");
	#endif

	#if 0
	/*
	* This is for reference. We have a table-driven version
	* of the little-endian crc32 generator, which is faster
	* than the double-loop.
	*/
	uint32_t
	ether_crc32_le(const uint8_t *buf, size_t len)
	{
	size_t i;
	uint32_t crc;
	int bit;
	uint8_t data;

	crc = 0xffffffff; /* initial value */

	for (i = 0; i < len; i++) {
	- for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1)
	+ for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) {
	carry = (crc ^ data) & 1;
	crc >>= 1;
	if (carry)
	crc = (crc ^ ETHER_CRC_POLY_LE);
	+ }
	}

	return (crc);
	}
	#else
	uint32_t
	ether_crc32_le(const uint8_t *buf, size_t len)
	{
	static const uint32_t crctab[] = {
	0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
	0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
	0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
	0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
	};
	size_t i;
	uint32_t crc;

	crc = 0xffffffff; /* initial value */

	for (i = 0; i < len; i++) {
	crc ^= buf[i];
	crc = (crc >> 4) ^ crctab[crc & 0xf];
	crc = (crc >> 4) ^ crctab[crc & 0xf];
	}

	return (crc);
	}
	#endif

	uint32_t
	ether_crc32_be(const uint8_t *buf, size_t len)
	{
	size_t i;
	uint32_t crc, carry;
	int bit;
	uint8_t data;

	crc = 0xffffffff; /* initial value */

	for (i = 0; i < len; i++) {
	for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) {
	carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01);
	crc <<= 1;
	if (carry)
	crc = (crc ^ ETHER_CRC_POLY_BE) \| carry;
	}
	}

	return (crc);
	}

	int
	ether_ioctl(struct ifnet *ifp, int command, caddr_t data)
	{
	struct ifaddr ifa = (struct ifaddr ) data;
	struct ifreq ifr = (struct ifreq ) data;
	int error = 0;

	switch (command) {
	case SIOCSIFADDR:
	ifp->if_flags \|= IFF_UP;

	switch (ifa->ifa_addr->sa_family) {
	#ifdef INET
	case AF_INET:
	ifp->if_init(ifp->if_softc); /* before arpwhohas */
	arp_ifinit(ifp, ifa);
	break;
	#endif
	#ifdef IPX
	/*
	* XXX - This code is probably wrong
	*/
	case AF_IPX:
	{
	struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr);

	if (ipx_nullhost(*ina))
	ina->x_host =
	(union ipx_host )
	IFP2ENADDR(ifp);
	else {
	bcopy((caddr_t) ina->x_host.c_host,
	(caddr_t) IFP2ENADDR(ifp),
	ETHER_ADDR_LEN);
	}

	/*
	* Set new address
	*/
	ifp->if_init(ifp->if_softc);
	break;
	}
	#endif
	default:
	ifp->if_init(ifp->if_softc);
	break;
	}
	break;

	case SIOCGIFADDR:
	{
	struct sockaddr *sa;

	sa = (struct sockaddr *) & ifr->ifr_data;
	bcopy(IFP2ENADDR(ifp),
	(caddr_t) sa->sa_data, ETHER_ADDR_LEN);
	}
	break;

	case SIOCSIFMTU:
	/*
	* Set the interface MTU.
	*/
	if (ifr->ifr_mtu > ETHERMTU) {
	error = EINVAL;
	} else {
	ifp->if_mtu = ifr->ifr_mtu;
	}
	break;
	default:
	error = EINVAL; /* XXX netbsd has ENOTTY??? */
	break;
	}
	return (error);
	}

	static int
	ether_resolvemulti(struct ifnet ifp, struct sockaddr *llsa,
	struct sockaddr *sa)
	{
	struct sockaddr_dl *sdl;
	#ifdef INET
	struct sockaddr_in *sin;
	#endif
	#ifdef INET6
	struct sockaddr_in6 *sin6;
	#endif
	u_char *e_addr;

	switch(sa->sa_family) {
	case AF_LINK:
	/*
	* No mapping needed. Just check that it's a valid MC address.
	*/
	sdl = (struct sockaddr_dl *)sa;
	e_addr = LLADDR(sdl);
	if (!ETHER_IS_MULTICAST(e_addr))
	return EADDRNOTAVAIL;
	*llsa = 0;
	return 0;

	#ifdef INET
	case AF_INET:
	sin = (struct sockaddr_in *)sa;
	if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
	return EADDRNOTAVAIL;
	MALLOC(sdl, struct sockaddr_dl , sizeof sdl, M_IFMADDR,
	M_NOWAIT\|M_ZERO);
	if (sdl == NULL)
	return ENOMEM;
	sdl->sdl_len = sizeof *sdl;
	sdl->sdl_family = AF_LINK;
	sdl->sdl_index = ifp->if_index;
	sdl->sdl_type = IFT_ETHER;
	sdl->sdl_alen = ETHER_ADDR_LEN;
	e_addr = LLADDR(sdl);
	ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
	llsa = (struct sockaddr )sdl;
	return 0;
	#endif
	#ifdef INET6
	case AF_INET6:
	sin6 = (struct sockaddr_in6 *)sa;
	if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
	/*
	* An IP6 address of 0 means listen to all
	* of the Ethernet multicast address used for IP6.
	* (This is used for multicast routers.)
	*/
	ifp->if_flags \|= IFF_ALLMULTI;
	*llsa = 0;
	return 0;
	}
	if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
	return EADDRNOTAVAIL;
	MALLOC(sdl, struct sockaddr_dl , sizeof sdl, M_IFMADDR,
	M_NOWAIT\|M_ZERO);
	if (sdl == NULL)
	return (ENOMEM);
	sdl->sdl_len = sizeof *sdl;
	sdl->sdl_family = AF_LINK;
	sdl->sdl_index = ifp->if_index;
	sdl->sdl_type = IFT_ETHER;
	sdl->sdl_alen = ETHER_ADDR_LEN;
	e_addr = LLADDR(sdl);
	ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
	llsa = (struct sockaddr )sdl;
	return 0;
	#endif

	default:
	/*
	* Well, the text isn't quite right, but it's the name
	* that counts...
	*/
	return EAFNOSUPPORT;
	}
	}

	static void*
	ether_alloc(u_char type, struct ifnet *ifp)
	{
	struct arpcom *ac;

	ac = malloc(sizeof(struct arpcom), M_ARPCOM, M_WAITOK \| M_ZERO);
	ac->ac_ifp = ifp;

	return (ac);
	}

	static void
	ether_free(void *com, u_char type)
	{

	free(com, M_ARPCOM);
	}

	static int
	ether_modevent(module_t mod, int type, void *data)
	{

	switch (type) {
	case MOD_LOAD:
	if_register_com_alloc(IFT_ETHER, ether_alloc, ether_free);
	break;
	case MOD_UNLOAD:
	if_deregister_com_alloc(IFT_ETHER);
	break;
	default:
	return EOPNOTSUPP;
	}

	return (0);
	}

	static moduledata_t ether_mod = {
	"ether",
	ether_modevent,
	0
	};

	void
	ether_vlan_mtap(struct bpf_if bp, struct mbuf m, void *data, u_int dlen)
	{
	struct ether_vlan_header vlan;
	struct mbuf mv, mb;
	struct m_tag *mtag;
	u_int tag;

	KASSERT((m->m_flags & M_VLANTAG) != 0,
	("%s: vlan information not present", __func__));
	KASSERT(m->m_len >= sizeof(struct ether_header),
	("%s: mbuf not large enough for header", __func__));
	mtag = m_tag_locate(m, MTAG_VLAN, MTAG_VLAN_TAG, NULL);
	KASSERT(mtag != NULL,
	("%s: NULL mtag with M_VLANTAG", __func__));
	tag = EVL_VLANOFTAG(VLAN_TAG_VALUE(mtag));
	bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header));
	vlan.evl_proto = vlan.evl_encap_proto;
	vlan.evl_encap_proto = htons(ETHERTYPE_VLAN);
	vlan.evl_tag = htons(tag);
	m->m_len -= sizeof(struct ether_header);
	m->m_data += sizeof(struct ether_header);
	/*
	* If a data link has been supplied by the caller, then we will need to
	* re-create a stack allocated mbuf chain with the following structure:
	*
	* (1) mbuf #1 will contain the supplied data link
	* (2) mbuf #2 will contain the vlan header
	* (3) mbuf #3 will contain the original mbuf's packet data
	*
	* Otherwise, submit the packet and vlan header via bpf_mtap2().
	*/
	if (data != NULL) {
	mv.m_next = m;
	mv.m_data = (caddr_t)&vlan;
	mv.m_len = sizeof(vlan);
	mb.m_next = &mv;
	mb.m_data = data;
	mb.m_len = dlen;
	bpf_mtap(bp, &mb);
	} else
	bpf_mtap2(bp, &vlan, sizeof(vlan), m);
	m->m_len += sizeof(struct ether_header);
	m->m_data -= sizeof(struct ether_header);
	}

	DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
	MODULE_VERSION(ether, 1);
	Index: stable/6/sys/pci
	===================================================================
	--- stable/6/sys/pci (revision 180928)
	+++ stable/6/sys/pci (revision 180929)

	Property changes on: stable/6/sys/pci
	___________________________________________________________________
	Modified: svn:mergeinfo
	## -0,0 +0,1 ##
	Merged /head/sys/pci:r178920
	Index: stable/6/sys
	===================================================================
	--- stable/6/sys (revision 180928)
	+++ stable/6/sys (revision 180929)

	Property changes on: stable/6/sys
	___________________________________________________________________
	Modified: svn:mergeinfo
	## -0,0 +0,1 ##
	Merged /head/sys:r178920

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