1/*-
2 * Copyright (c) 1982, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
30 * $FreeBSD: head/sys/net/if_ethersubr.c 167816 2007-03-22 19:08:39Z bms $
31 */
32
33#include "opt_atalk.h"
34#include "opt_inet.h"
35#include "opt_inet6.h"
36#include "opt_ipx.h"
37#include "opt_mac.h"
38#include "opt_netgraph.h"

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108void (*vlan_input_p)(struct ifnet *, struct mbuf *);
109
110/* if_bridge(4) support */
111struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *);
112int (*bridge_output_p)(struct ifnet *, struct mbuf *,
113 struct sockaddr *, struct rtentry *);
114void (*bridge_dn_p)(struct mbuf *, struct ifnet *);
115
116static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] =
117 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
118
119static int ether_resolvemulti(struct ifnet *, struct sockaddr **,
120 struct sockaddr *);
121
122/* XXX: should be in an arp support file, not here */
123MALLOC_DEFINE(M_ARPCOM, "arpcom", "802.* interface internals");

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597 ifp->if_ibytes += m->m_pkthdr.len;
598
599 /* Allow monitor mode to claim this frame, after stats are updated. */
600 if (ifp->if_flags & IFF_MONITOR) {
601 m_freem(m);
602 return;
603 }
604
605 /*
606 * If the hardware did not process an 802.1Q tag, do this now,
607 * to allow 802.1P priority frames to be passed to the main input
608 * path correctly.
609 * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels.
610 */
611 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) {
612 struct ether_vlan_header *evl;

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