2 * Copyright (c) 1982, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: src/sys/net/if_ethersubr.c,v 1.70.2.33 2003/04/28 15:45:53 archie Exp $
35 * $DragonFly: src/sys/net/if_ethersubr.c,v 1.52 2007/11/27 11:06:31 sephe Exp $
38 #include "opt_atalk.h"
40 #include "opt_inet6.h"
42 #include "opt_netgraph.h"
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/kernel.h>
48 #include <sys/malloc.h>
50 #include <sys/socket.h>
51 #include <sys/sockio.h>
52 #include <sys/sysctl.h>
55 #include <net/netisr.h>
56 #include <net/route.h>
57 #include <net/if_llc.h>
58 #include <net/if_dl.h>
59 #include <net/if_types.h>
60 #include <net/ifq_var.h>
62 #include <net/ethernet.h>
64 #if defined(INET) || defined(INET6)
65 #include <netinet/in.h>
66 #include <netinet/in_var.h>
67 #include <netinet/if_ether.h>
68 #include <net/ipfw/ip_fw.h>
69 #include <net/dummynet/ip_dummynet.h>
72 #include <netinet6/nd6.h>
76 #include <netinet/ip_carp.h>
80 #include <netproto/ipx/ipx.h>
81 #include <netproto/ipx/ipx_if.h>
82 int (*ef_inputp
)(struct ifnet
*, const struct ether_header
*eh
, struct mbuf
*m
);
83 int (*ef_outputp
)(struct ifnet
*ifp
, struct mbuf
**mp
, struct sockaddr
*dst
,
84 short *tp
, int *hlen
);
89 #include <netns/ns_if.h>
91 int ether_outputdebug
= 0;
92 int ether_inputdebug
= 0;
96 #include <netproto/atalk/at.h>
97 #include <netproto/atalk/at_var.h>
98 #include <netproto/atalk/at_extern.h>
100 #define llc_snap_org_code llc_un.type_snap.org_code
101 #define llc_snap_ether_type llc_un.type_snap.ether_type
103 extern u_char at_org_code
[3];
104 extern u_char aarp_org_code
[3];
105 #endif /* NETATALK */
107 /* netgraph node hooks for ng_ether(4) */
108 void (*ng_ether_input_p
)(struct ifnet
*ifp
,
109 struct mbuf
**mp
, const struct ether_header
*eh
);
110 void (*ng_ether_input_orphan_p
)(struct ifnet
*ifp
,
111 struct mbuf
*m
, const struct ether_header
*eh
);
112 int (*ng_ether_output_p
)(struct ifnet
*ifp
, struct mbuf
**mp
);
113 void (*ng_ether_attach_p
)(struct ifnet
*ifp
);
114 void (*ng_ether_detach_p
)(struct ifnet
*ifp
);
116 int (*vlan_input_p
)(const struct ether_header
*eh
, struct mbuf
*m
);
117 int (*vlan_input_tag_p
)(struct mbuf
*m
, uint16_t t
);
119 static int ether_output(struct ifnet
*, struct mbuf
*, struct sockaddr
*,
125 struct mbuf
*(*bridge_input_p
)(struct ifnet
*, struct mbuf
*);
126 int (*bridge_output_p
)(struct ifnet
*, struct mbuf
*,
127 struct sockaddr
*, struct rtentry
*);
128 void (*bridge_dn_p
)(struct mbuf
*, struct ifnet
*);
130 static int ether_resolvemulti(struct ifnet
*, struct sockaddr
**,
133 const uint8_t etherbroadcastaddr
[ETHER_ADDR_LEN
] = {
134 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
137 #define gotoerr(e) do { error = (e); goto bad; } while (0)
138 #define IFP2AC(ifp) ((struct arpcom *)(ifp))
140 static boolean_t
ether_ipfw_chk(struct mbuf
**m0
, struct ifnet
*dst
,
142 const struct ether_header
*eh
,
145 static int ether_ipfw
;
146 SYSCTL_DECL(_net_link
);
147 SYSCTL_NODE(_net_link
, IFT_ETHER
, ether
, CTLFLAG_RW
, 0, "Ethernet");
148 SYSCTL_INT(_net_link_ether
, OID_AUTO
, ipfw
, CTLFLAG_RW
,
149 ðer_ipfw
, 0, "Pass ether pkts through firewall");
152 * Ethernet output routine.
153 * Encapsulate a packet of type family for the local net.
154 * Use trailer local net encapsulation if enough data in first
155 * packet leaves a multiple of 512 bytes of data in remainder.
156 * Assumes that ifp is actually pointer to arpcom structure.
159 ether_output(struct ifnet
*ifp
, struct mbuf
*m
, struct sockaddr
*dst
,
162 struct ether_header
*eh
, *deh
;
165 int hlen
= ETHER_HDR_LEN
; /* link layer header length */
166 struct arpcom
*ac
= IFP2AC(ifp
);
169 ASSERT_SERIALIZED(ifp
->if_serializer
);
171 if (ifp
->if_flags
& IFF_MONITOR
)
173 if ((ifp
->if_flags
& (IFF_UP
| IFF_RUNNING
)) != (IFF_UP
| IFF_RUNNING
))
176 M_PREPEND(m
, sizeof(struct ether_header
), MB_DONTWAIT
);
179 eh
= mtod(m
, struct ether_header
*);
180 edst
= eh
->ether_dhost
;
183 * Fill in the destination ethernet address and frame type.
185 switch (dst
->sa_family
) {
188 if (!arpresolve(ifp
, rt
, m
, dst
, edst
))
189 return (0); /* if not yet resolved */
190 eh
->ether_type
= htons(ETHERTYPE_IP
);
195 if (!nd6_storelladdr(&ac
->ac_if
, rt
, m
, dst
, edst
))
196 return (0); /* Something bad happenned. */
197 eh
->ether_type
= htons(ETHERTYPE_IPV6
);
202 if (ef_outputp
!= NULL
) {
203 error
= ef_outputp(ifp
, &m
, dst
, &eh
->ether_type
,
208 eh
->ether_type
= htons(ETHERTYPE_IPX
);
209 bcopy(&(((struct sockaddr_ipx
*)dst
)->sipx_addr
.x_host
),
210 edst
, ETHER_ADDR_LEN
);
216 struct at_ifaddr
*aa
;
218 if ((aa
= at_ifawithnet((struct sockaddr_at
*)dst
)) == NULL
) {
223 * In the phase 2 case, need to prepend an mbuf for
224 * the llc header. Since we must preserve the value
225 * of m, which is passed to us by value, we m_copy()
226 * the first mbuf, and use it for our llc header.
228 if (aa
->aa_flags
& AFA_PHASE2
) {
231 M_PREPEND(m
, sizeof(struct llc
), MB_DONTWAIT
);
232 eh
= mtod(m
, struct ether_header
*);
233 edst
= eh
->ether_dhost
;
234 llc
.llc_dsap
= llc
.llc_ssap
= LLC_SNAP_LSAP
;
235 llc
.llc_control
= LLC_UI
;
236 bcopy(at_org_code
, llc
.llc_snap_org_code
,
238 llc
.llc_snap_ether_type
= htons(ETHERTYPE_AT
);
240 mtod(m
, caddr_t
) + sizeof(struct ether_header
),
242 eh
->ether_type
= htons(m
->m_pkthdr
.len
);
243 hlen
= sizeof(struct llc
) + ETHER_HDR_LEN
;
245 eh
->ether_type
= htons(ETHERTYPE_AT
);
247 if (!aarpresolve(ac
, m
, (struct sockaddr_at
*)dst
, edst
))
256 case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
257 eh
->ether_type
= 0x8137;
259 case 0x0: /* Novell 802.3 */
260 eh
->ether_type
= htons(m
->m_pkthdr
.len
);
262 case 0xe0e0: /* Novell 802.2 and Token-Ring */
263 M_PREPEND(m
, 3, MB_DONTWAIT
);
264 eh
= mtod(m
, struct ether_header
*);
265 edst
= eh
->ether_dhost
;
266 eh
->ether_type
= htons(m
->m_pkthdr
.len
);
267 cp
= mtod(m
, u_char
*) + sizeof(struct ether_header
);
273 bcopy(&(((struct sockaddr_ns
*)dst
)->sns_addr
.x_host
), edst
,
276 * XXX if ns_thishost is the same as the node's ethernet
277 * address then just the default code will catch this anyhow.
278 * So I'm not sure if this next clause should be here at all?
281 if (bcmp(edst
, &ns_thishost
, ETHER_ADDR_LEN
) == 0) {
282 m
->m_pkthdr
.rcvif
= ifp
;
283 netisr_dispatch(NETISR_NS
, m
);
286 if (bcmp(edst
, &ns_broadhost
, ETHER_ADDR_LEN
) == 0)
287 m
->m_flags
|= M_BCAST
;
290 case pseudo_AF_HDRCMPLT
:
292 loop_copy
= -1; /* if this is for us, don't do it */
293 deh
= (struct ether_header
*)dst
->sa_data
;
294 memcpy(edst
, deh
->ether_dhost
, ETHER_ADDR_LEN
);
295 eh
->ether_type
= deh
->ether_type
;
299 if_printf(ifp
, "can't handle af%d\n", dst
->sa_family
);
300 gotoerr(EAFNOSUPPORT
);
303 if (dst
->sa_family
== pseudo_AF_HDRCMPLT
) /* unlikely */
304 memcpy(eh
->ether_shost
,
305 ((struct ether_header
*)dst
->sa_data
)->ether_shost
,
308 memcpy(eh
->ether_shost
, ac
->ac_enaddr
, ETHER_ADDR_LEN
);
311 * Bridges require special output handling.
313 if (ifp
->if_bridge
) {
314 KASSERT(bridge_output_p
!= NULL
,
315 ("%s: if_bridge not loaded!", __func__
));
316 return ((*bridge_output_p
)(ifp
, m
, NULL
, NULL
));
320 * If a simplex interface, and the packet is being sent to our
321 * Ethernet address or a broadcast address, loopback a copy.
322 * XXX To make a simplex device behave exactly like a duplex
323 * device, we should copy in the case of sending to our own
324 * ethernet address (thus letting the original actually appear
325 * on the wire). However, we don't do that here for security
326 * reasons and compatibility with the original behavior.
328 if ((ifp
->if_flags
& IFF_SIMPLEX
) && (loop_copy
!= -1)) {
331 if (m
->m_pkthdr
.csum_flags
& CSUM_IP
)
332 csum_flags
|= (CSUM_IP_CHECKED
| CSUM_IP_VALID
);
333 if (m
->m_pkthdr
.csum_flags
& CSUM_DELAY_DATA
)
334 csum_flags
|= (CSUM_DATA_VALID
| CSUM_PSEUDO_HDR
);
335 if ((m
->m_flags
& M_BCAST
) || (loop_copy
> 0)) {
338 if ((n
= m_copypacket(m
, MB_DONTWAIT
)) != NULL
) {
339 n
->m_pkthdr
.csum_flags
|= csum_flags
;
340 if (csum_flags
& CSUM_DATA_VALID
)
341 n
->m_pkthdr
.csum_data
= 0xffff;
342 if_simloop(ifp
, n
, dst
->sa_family
, hlen
);
345 } else if (bcmp(eh
->ether_dhost
, eh
->ether_shost
,
346 ETHER_ADDR_LEN
) == 0) {
347 m
->m_pkthdr
.csum_flags
|= csum_flags
;
348 if (csum_flags
& CSUM_DATA_VALID
)
349 m
->m_pkthdr
.csum_data
= 0xffff;
350 if_simloop(ifp
, m
, dst
->sa_family
, hlen
);
351 return (0); /* XXX */
356 if (ifp
->if_carp
&& (error
= carp_output(ifp
, m
, dst
, NULL
)))
361 /* Handle ng_ether(4) processing, if any */
362 if (ng_ether_output_p
!= NULL
) {
363 if ((error
= (*ng_ether_output_p
)(ifp
, &m
)) != 0)
369 /* Continue with link-layer output */
370 return ether_output_frame(ifp
, m
);
378 * Ethernet link layer output routine to send a raw frame to the device.
380 * This assumes that the 14 byte Ethernet header is present and contiguous
384 ether_output_frame(struct ifnet
*ifp
, struct mbuf
*m
)
386 struct ip_fw
*rule
= NULL
;
388 struct altq_pktattr pktattr
;
391 ASSERT_SERIALIZED(ifp
->if_serializer
);
393 /* Extract info from dummynet tag */
394 mtag
= m_tag_find(m
, PACKET_TAG_DUMMYNET
, NULL
);
396 rule
= ((struct dn_pkt
*)m_tag_data(mtag
))->dn_priv
;
398 m_tag_delete(m
, mtag
);
402 if (ifq_is_enabled(&ifp
->if_snd
))
403 altq_etherclassify(&ifp
->if_snd
, m
, &pktattr
);
405 if (IPFW_LOADED
&& ether_ipfw
!= 0) {
406 struct ether_header save_eh
, *eh
;
408 eh
= mtod(m
, struct ether_header
*);
410 m_adj(m
, ETHER_HDR_LEN
);
411 if (!ether_ipfw_chk(&m
, ifp
, &rule
, eh
, FALSE
)) {
415 return ENOBUFS
; /* pkt dropped */
417 return 0; /* consumed e.g. in a pipe */
419 eh
= mtod(m
, struct ether_header
*);
420 /* packet was ok, restore the ethernet header */
421 if ((void *)(eh
+ 1) == (void *)m
->m_data
) {
422 m
->m_data
-= ETHER_HDR_LEN
;
423 m
->m_len
+= ETHER_HDR_LEN
;
424 m
->m_pkthdr
.len
+= ETHER_HDR_LEN
;
426 M_PREPEND(m
, ETHER_HDR_LEN
, MB_DONTWAIT
);
427 if (m
== NULL
) /* nope... */ {
431 bcopy(&save_eh
, mtod(m
, struct ether_header
*),
438 * Queue message on interface, update output statistics if
439 * successful, and start output if interface not yet active.
441 error
= ifq_handoff(ifp
, m
, &pktattr
);
446 * ipfw processing for ethernet packets (in and out).
447 * The second parameter is NULL from ether_demux(), and ifp from
448 * ether_output_frame().
455 const struct ether_header
*eh
,
458 struct ether_header save_eh
= *eh
; /* might be a ptr in m */
459 struct ip_fw_args args
;
463 if (*rule
!= NULL
&& fw_one_pass
)
464 return TRUE
; /* dummynet packet, already partially processed */
467 * I need some amount of data to be contiguous, and in case others
468 * need the packet (shared==TRUE), it also better be in the first mbuf.
470 i
= min((*m0
)->m_pkthdr
.len
, max_protohdr
);
471 if (shared
|| (*m0
)->m_len
< i
) {
472 *m0
= m_pullup(*m0
, i
);
477 args
.m
= *m0
; /* the packet we are looking at */
478 args
.oif
= dst
; /* destination, if any */
479 if ((mtag
= m_tag_find(*m0
, PACKET_TAG_IPFW_DIVERT
, NULL
)) != NULL
)
480 m_tag_delete(*m0
, mtag
);
481 args
.rule
= *rule
; /* matching rule to restart */
482 args
.next_hop
= NULL
; /* we do not support forward yet */
483 args
.eh
= &save_eh
; /* MAC header for bridged/MAC packets */
484 i
= ip_fw_chk_ptr(&args
);
488 if ((i
& IP_FW_PORT_DENY_FLAG
) || *m0
== NULL
) /* drop */
491 if (i
== 0) /* a PASS rule. */
494 if (i
& IP_FW_PORT_DYNT_FLAG
) {
496 * Pass the pkt to dummynet, which consumes it.
497 * If shared, make a copy and keep the original.
502 m
= m_copypacket(*m0
, MB_DONTWAIT
);
506 m
= *m0
; /* pass the original to dummynet */
507 *m0
= NULL
; /* and nothing back to the caller */
510 * Prepend the header, optimize for the common case of
511 * eh pointing into the mbuf.
513 if ((const void *)(eh
+ 1) == (void *)m
->m_data
) {
514 m
->m_data
-= ETHER_HDR_LEN
;
515 m
->m_len
+= ETHER_HDR_LEN
;
516 m
->m_pkthdr
.len
+= ETHER_HDR_LEN
;
518 M_PREPEND(m
, ETHER_HDR_LEN
, MB_DONTWAIT
);
521 bcopy(&save_eh
, mtod(m
, struct ether_header
*),
524 ip_fw_dn_io_ptr(m
, (i
& 0xffff),
525 dst
? DN_TO_ETH_OUT
: DN_TO_ETH_DEMUX
, &args
);
529 * XXX at some point add support for divert/forward actions.
530 * If none of the above matches, we have to drop the pkt.
536 * Process a received Ethernet packet.
538 * The ethernet header is assumed to be in the mbuf so the caller
539 * MUST MAKE SURE that there are at least sizeof(struct ether_header)
540 * bytes in the first mbuf.
542 * This allows us to concentrate in one place a bunch of code which
543 * is replicated in all device drivers. Also, many functions called
544 * from ether_input() try to put the eh back into the mbuf, so we
545 * can later propagate the 'contiguous packet' interface to them.
547 * NOTA BENE: for all drivers "eh" is a pointer into the first mbuf or
548 * cluster, right before m_data. So be very careful when working on m,
549 * as you could destroy *eh !!
551 * First we perform any link layer operations, then continue to the
552 * upper layers with ether_demux().
555 ether_input(struct ifnet
*ifp
, struct mbuf
*m
)
557 struct ether_header
*eh
;
559 ASSERT_SERIALIZED(ifp
->if_serializer
);
562 /* Discard packet if interface is not up */
563 if (!(ifp
->if_flags
& IFF_UP
)) {
568 if (m
->m_len
< sizeof(struct ether_header
)) {
569 /* XXX error in the caller. */
573 eh
= mtod(m
, struct ether_header
*);
575 m
->m_pkthdr
.rcvif
= ifp
;
577 if (ETHER_IS_MULTICAST(eh
->ether_dhost
)) {
578 if (bcmp(ifp
->if_broadcastaddr
, eh
->ether_dhost
,
579 ifp
->if_addrlen
) == 0)
580 m
->m_flags
|= M_BCAST
;
582 m
->m_flags
|= M_MCAST
;
588 ifp
->if_ibytes
+= m
->m_pkthdr
.len
;
590 if (ifp
->if_flags
& IFF_MONITOR
) {
592 * Interface marked for monitoring; discard packet.
599 * Tap the packet off here for a bridge. bridge_input()
600 * will return NULL if it has consumed the packet, otherwise
601 * it gets processed as normal. Note that bridge_input()
602 * will always return the original packet if we need to
603 * process it locally.
605 if (ifp
->if_bridge
) {
606 KASSERT(bridge_input_p
!= NULL
,
607 ("%s: if_bridge not loaded!", __func__
));
609 if(m
->m_flags
& M_PROTO1
) {
610 m
->m_flags
&= ~M_PROTO1
;
612 /* clear M_PROMISC, in case the packets comes from a vlan */
613 /* m->m_flags &= ~M_PROMISC; */
614 lwkt_serialize_exit(ifp
->if_serializer
);
615 m
= (*bridge_input_p
)(ifp
, m
);
616 lwkt_serialize_enter(ifp
->if_serializer
);
620 KASSERT(ifp
== m
->m_pkthdr
.rcvif
,
621 ("bridge_input_p changed rcvif\n"));
623 /* 'm' may be changed by bridge_input_p() */
624 eh
= mtod(m
, struct ether_header
*);
628 /* XXX old crufty stuff, needs to be removed */
629 m_adj(m
, sizeof(struct ether_header
));
631 /* m->m_pkthdr.len = m->m_len; */
633 /* Handle ng_ether(4) processing, if any */
634 if (ng_ether_input_p
!= NULL
) {
635 lwkt_serialize_exit(ifp
->if_serializer
);
636 (*ng_ether_input_p
)(ifp
, &m
, eh
);
637 lwkt_serialize_enter(ifp
->if_serializer
);
642 /* Continue with upper layer processing */
643 ether_demux(ifp
, eh
, m
);
647 * Upper layer processing for a received Ethernet packet.
650 ether_demux(struct ifnet
*ifp
, struct ether_header
*eh0
, struct mbuf
*m
)
652 struct ether_header eh
;
655 struct ip_fw
*rule
= NULL
;
663 /* Extract info from dummynet tag */
664 mtag
= m_tag_find(m
, PACKET_TAG_DUMMYNET
, NULL
);
666 rule
= ((struct dn_pkt
*)m_tag_data(mtag
))->dn_priv
;
667 KKASSERT(ifp
== NULL
);
668 ifp
= m
->m_pkthdr
.rcvif
;
670 m_tag_delete(m
, mtag
);
673 if (rule
) /* packet is passing the second time */
678 * XXX: Okay, we need to call carp_forus() and - if it is for
679 * us jump over code that does the normal check
680 * "ac_enaddr == ether_dhost". The check sequence is a bit
681 * different from OpenBSD, so we jump over as few code as
682 * possible, to catch _all_ sanity checks. This needs
683 * evaluation, to see if the carp ether_dhost values break any
686 if (ifp
->if_carp
&& carp_forus(ifp
->if_carp
, eh
.ether_dhost
))
691 * Discard packet if upper layers shouldn't see it because
692 * it was unicast to a different Ethernet address. If the
693 * driver is working properly, then this situation can only
694 * happen when the interface is in promiscuous mode.
696 if (((ifp
->if_flags
& (IFF_PROMISC
| IFF_PPROMISC
)) == IFF_PROMISC
) &&
697 (eh
.ether_dhost
[0] & 1) == 0 &&
698 bcmp(eh
.ether_dhost
, IFP2AC(ifp
)->ac_enaddr
, ETHER_ADDR_LEN
)) {
704 if (IPFW_LOADED
&& ether_ipfw
!= 0) {
705 if (!ether_ipfw_chk(&m
, NULL
, &rule
, &eh
, FALSE
)) {
711 ether_type
= ntohs(eh
.ether_type
);
713 switch (ether_type
) {
716 if (ipflow_fastforward(m
, ifp
->if_serializer
))
722 if (ifp
->if_flags
& IFF_NOARP
) {
723 /* Discard packet if ARP is disabled on interface */
739 if (ef_inputp
&& ef_inputp(ifp
, &eh
, m
) == 0)
746 case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
762 if (vlan_input_p
!= NULL
)
763 (*vlan_input_p
)(&eh
, m
);
765 m
->m_pkthdr
.rcvif
->if_noproto
++;
772 if (ef_inputp
&& ef_inputp(ifp
, &eh
, m
) == 0)
776 checksum
= mtod(m
, ushort
*);
778 if ((ether_type
<= ETHERMTU
) &&
779 ((*checksum
== 0xffff) || (*checksum
== 0xE0E0))) {
780 if (*checksum
== 0xE0E0) {
781 m
->m_pkthdr
.len
-= 3;
790 if (ether_type
> ETHERMTU
)
792 l
= mtod(m
, struct llc
*);
793 if (l
->llc_dsap
== LLC_SNAP_LSAP
&&
794 l
->llc_ssap
== LLC_SNAP_LSAP
&&
795 l
->llc_control
== LLC_UI
) {
796 if (bcmp(&(l
->llc_snap_org_code
)[0], at_org_code
,
797 sizeof at_org_code
) == 0 &&
798 ntohs(l
->llc_snap_ether_type
) == ETHERTYPE_AT
) {
799 m_adj(m
, sizeof(struct llc
));
803 if (bcmp(&(l
->llc_snap_org_code
)[0], aarp_org_code
,
804 sizeof aarp_org_code
) == 0 &&
805 ntohs(l
->llc_snap_ether_type
) == ETHERTYPE_AARP
) {
806 m_adj(m
, sizeof(struct llc
));
813 if (ng_ether_input_orphan_p
!= NULL
)
814 (*ng_ether_input_orphan_p
)(ifp
, m
, &eh
);
819 netisr_dispatch(isr
, m
);
823 * Perform common duties while attaching to interface list
827 ether_ifattach(struct ifnet
*ifp
, uint8_t *lla
, lwkt_serialize_t serializer
)
829 ether_ifattach_bpf(ifp
, lla
, DLT_EN10MB
, sizeof(struct ether_header
),
834 ether_ifattach_bpf(struct ifnet
*ifp
, uint8_t *lla
, u_int dlt
, u_int hdrlen
,
835 lwkt_serialize_t serializer
)
837 struct sockaddr_dl
*sdl
;
839 ifp
->if_type
= IFT_ETHER
;
840 ifp
->if_addrlen
= ETHER_ADDR_LEN
;
841 ifp
->if_hdrlen
= ETHER_HDR_LEN
;
842 if_attach(ifp
, serializer
);
843 ifp
->if_mtu
= ETHERMTU
;
844 if (ifp
->if_baudrate
== 0)
845 ifp
->if_baudrate
= 10000000;
846 ifp
->if_output
= ether_output
;
847 ifp
->if_input
= ether_input
;
848 ifp
->if_resolvemulti
= ether_resolvemulti
;
849 ifp
->if_broadcastaddr
= etherbroadcastaddr
;
850 sdl
= IF_LLSOCKADDR(ifp
);
851 sdl
->sdl_type
= IFT_ETHER
;
852 sdl
->sdl_alen
= ifp
->if_addrlen
;
853 bcopy(lla
, LLADDR(sdl
), ifp
->if_addrlen
);
855 * XXX Keep the current drivers happy.
856 * XXX Remove once all drivers have been cleaned up
858 if (lla
!= IFP2AC(ifp
)->ac_enaddr
)
859 bcopy(lla
, IFP2AC(ifp
)->ac_enaddr
, ifp
->if_addrlen
);
860 bpfattach(ifp
, dlt
, hdrlen
);
861 if (ng_ether_attach_p
!= NULL
)
862 (*ng_ether_attach_p
)(ifp
);
864 if_printf(ifp
, "MAC address: %6D\n", lla
, ":");
868 * Perform common duties while detaching an Ethernet interface
871 ether_ifdetach(struct ifnet
*ifp
)
875 if (ng_ether_detach_p
!= NULL
)
876 (*ng_ether_detach_p
)(ifp
);
882 ether_ioctl(struct ifnet
*ifp
, int command
, caddr_t data
)
884 struct ifaddr
*ifa
= (struct ifaddr
*) data
;
885 struct ifreq
*ifr
= (struct ifreq
*) data
;
888 #define IF_INIT(ifp) \
890 if (((ifp)->if_flags & IFF_UP) == 0) { \
891 (ifp)->if_flags |= IFF_UP; \
892 (ifp)->if_init((ifp)->if_softc); \
896 ASSERT_SERIALIZED(ifp
->if_serializer
);
900 switch (ifa
->ifa_addr
->sa_family
) {
903 IF_INIT(ifp
); /* before arpwhohas */
904 arp_ifinit(ifp
, ifa
);
909 * XXX - This code is probably wrong
913 struct ipx_addr
*ina
= &IA_SIPX(ifa
)->sipx_addr
;
914 struct arpcom
*ac
= IFP2AC(ifp
);
916 if (ipx_nullhost(*ina
))
917 ina
->x_host
= *(union ipx_host
*) ac
->ac_enaddr
;
919 bcopy(ina
->x_host
.c_host
, ac
->ac_enaddr
,
920 sizeof ac
->ac_enaddr
);
922 IF_INIT(ifp
); /* Set new address. */
928 * XXX - This code is probably wrong
932 struct ns_addr
*ina
= &(IA_SNS(ifa
)->sns_addr
);
933 struct arpcom
*ac
= IFP2AC(ifp
);
935 if (ns_nullhost(*ina
))
936 ina
->x_host
= *(union ns_host
*)(ac
->ac_enaddr
);
938 bcopy(ina
->x_host
.c_host
, ac
->ac_enaddr
,
939 sizeof ac
->ac_enaddr
);
955 bcopy(IFP2AC(ifp
)->ac_enaddr
,
956 ((struct sockaddr
*)ifr
->ifr_data
)->sa_data
,
962 * Set the interface MTU.
964 if (ifr
->ifr_mtu
> ETHERMTU
) {
967 ifp
->if_mtu
= ifr
->ifr_mtu
;
982 struct sockaddr
**llsa
,
985 struct sockaddr_dl
*sdl
;
986 struct sockaddr_in
*sin
;
988 struct sockaddr_in6
*sin6
;
992 switch(sa
->sa_family
) {
995 * No mapping needed. Just check that it's a valid MC address.
997 sdl
= (struct sockaddr_dl
*)sa
;
998 e_addr
= LLADDR(sdl
);
999 if ((e_addr
[0] & 1) != 1)
1000 return EADDRNOTAVAIL
;
1006 sin
= (struct sockaddr_in
*)sa
;
1007 if (!IN_MULTICAST(ntohl(sin
->sin_addr
.s_addr
)))
1008 return EADDRNOTAVAIL
;
1009 MALLOC(sdl
, struct sockaddr_dl
*, sizeof *sdl
, M_IFMADDR
,
1011 sdl
->sdl_len
= sizeof *sdl
;
1012 sdl
->sdl_family
= AF_LINK
;
1013 sdl
->sdl_index
= ifp
->if_index
;
1014 sdl
->sdl_type
= IFT_ETHER
;
1015 sdl
->sdl_alen
= ETHER_ADDR_LEN
;
1016 e_addr
= LLADDR(sdl
);
1017 ETHER_MAP_IP_MULTICAST(&sin
->sin_addr
, e_addr
);
1018 *llsa
= (struct sockaddr
*)sdl
;
1023 sin6
= (struct sockaddr_in6
*)sa
;
1024 if (IN6_IS_ADDR_UNSPECIFIED(&sin6
->sin6_addr
)) {
1026 * An IP6 address of 0 means listen to all
1027 * of the Ethernet multicast address used for IP6.
1028 * (This is used for multicast routers.)
1030 ifp
->if_flags
|= IFF_ALLMULTI
;
1034 if (!IN6_IS_ADDR_MULTICAST(&sin6
->sin6_addr
))
1035 return EADDRNOTAVAIL
;
1036 MALLOC(sdl
, struct sockaddr_dl
*, sizeof *sdl
, M_IFMADDR
,
1038 sdl
->sdl_len
= sizeof *sdl
;
1039 sdl
->sdl_family
= AF_LINK
;
1040 sdl
->sdl_index
= ifp
->if_index
;
1041 sdl
->sdl_type
= IFT_ETHER
;
1042 sdl
->sdl_alen
= ETHER_ADDR_LEN
;
1043 e_addr
= LLADDR(sdl
);
1044 ETHER_MAP_IPV6_MULTICAST(&sin6
->sin6_addr
, e_addr
);
1045 *llsa
= (struct sockaddr
*)sdl
;
1051 * Well, the text isn't quite right, but it's the name
1054 return EAFNOSUPPORT
;
1060 * This is for reference. We have a table-driven version
1061 * of the little-endian crc32 generator, which is faster
1062 * than the double-loop.
1065 ether_crc32_le(const uint8_t *buf
, size_t len
)
1067 uint32_t c
, crc
, carry
;
1070 crc
= 0xffffffffU
; /* initial value */
1072 for (i
= 0; i
< len
; i
++) {
1074 for (j
= 0; j
< 8; j
++) {
1075 carry
= ((crc
& 0x01) ? 1 : 0) ^ (c
& 0x01);
1079 crc
= (crc
^ ETHER_CRC_POLY_LE
);
1087 ether_crc32_le(const uint8_t *buf
, size_t len
)
1089 static const uint32_t crctab
[] = {
1090 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
1091 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
1092 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
1093 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
1098 crc
= 0xffffffffU
; /* initial value */
1100 for (i
= 0; i
< len
; i
++) {
1102 crc
= (crc
>> 4) ^ crctab
[crc
& 0xf];
1103 crc
= (crc
>> 4) ^ crctab
[crc
& 0xf];
1111 ether_crc32_be(const uint8_t *buf
, size_t len
)
1113 uint32_t c
, crc
, carry
;
1116 crc
= 0xffffffffU
; /* initial value */
1118 for (i
= 0; i
< len
; i
++) {
1120 for (j
= 0; j
< 8; j
++) {
1121 carry
= ((crc
& 0x80000000U
) ? 1 : 0) ^ (c
& 0x01);
1125 crc
= (crc
^ ETHER_CRC_POLY_BE
) | carry
;
1133 * find the size of ethernet header, and call classifier
1136 altq_etherclassify(struct ifaltq
*ifq
, struct mbuf
*m
,
1137 struct altq_pktattr
*pktattr
)
1139 struct ether_header
*eh
;
1140 uint16_t ether_type
;
1141 int hlen
, af
, hdrsize
;
1144 hlen
= sizeof(struct ether_header
);
1145 eh
= mtod(m
, struct ether_header
*);
1147 ether_type
= ntohs(eh
->ether_type
);
1148 if (ether_type
< ETHERMTU
) {
1150 struct llc
*llc
= (struct llc
*)(eh
+ 1);
1153 if (m
->m_len
< hlen
||
1154 llc
->llc_dsap
!= LLC_SNAP_LSAP
||
1155 llc
->llc_ssap
!= LLC_SNAP_LSAP
||
1156 llc
->llc_control
!= LLC_UI
)
1157 goto bad
; /* not snap! */
1159 ether_type
= ntohs(llc
->llc_un
.type_snap
.ether_type
);
1162 if (ether_type
== ETHERTYPE_IP
) {
1164 hdrsize
= 20; /* sizeof(struct ip) */
1166 } else if (ether_type
== ETHERTYPE_IPV6
) {
1168 hdrsize
= 40; /* sizeof(struct ip6_hdr) */
1173 while (m
->m_len
<= hlen
) {
1177 hdr
= m
->m_data
+ hlen
;
1178 if (m
->m_len
< hlen
+ hdrsize
) {
1180 * ip header is not in a single mbuf. this should not
1181 * happen in the current code.
1182 * (todo: use m_pulldown in the future)
1188 ifq_classify(ifq
, m
, af
, pktattr
);
1195 pktattr
->pattr_class
= NULL
;
1196 pktattr
->pattr_hdr
= NULL
;
1197 pktattr
->pattr_af
= AF_UNSPEC
;