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 1.66 2008/06/15 11:19:15 sephe Exp $
38 #include "opt_atalk.h"
40 #include "opt_inet6.h"
42 #include "opt_netgraph.h"
44 #include "opt_ethernet.h"
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/globaldata.h>
49 #include <sys/kernel.h>
50 #include <sys/malloc.h>
52 #include <sys/msgport.h>
53 #include <sys/socket.h>
54 #include <sys/sockio.h>
55 #include <sys/sysctl.h>
56 #include <sys/thread.h>
57 #include <sys/thread2.h>
60 #include <net/netisr.h>
61 #include <net/route.h>
62 #include <net/if_llc.h>
63 #include <net/if_dl.h>
64 #include <net/if_types.h>
65 #include <net/ifq_var.h>
67 #include <net/ethernet.h>
68 #include <net/vlan/if_vlan_ether.h>
70 #if defined(INET) || defined(INET6)
71 #include <netinet/in.h>
72 #include <netinet/in_var.h>
73 #include <netinet/if_ether.h>
74 #include <net/ipfw/ip_fw.h>
75 #include <net/dummynet/ip_dummynet.h>
78 #include <netinet6/nd6.h>
82 #include <netinet/ip_carp.h>
86 #include <netproto/ipx/ipx.h>
87 #include <netproto/ipx/ipx_if.h>
88 int (*ef_inputp)(struct ifnet*, const struct ether_header *eh, struct mbuf *m);
89 int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp, struct sockaddr *dst,
90 short *tp, int *hlen);
95 #include <netns/ns_if.h>
97 int ether_outputdebug = 0;
98 int ether_inputdebug = 0;
102 #include <netproto/atalk/at.h>
103 #include <netproto/atalk/at_var.h>
104 #include <netproto/atalk/at_extern.h>
106 #define llc_snap_org_code llc_un.type_snap.org_code
107 #define llc_snap_ether_type llc_un.type_snap.ether_type
109 extern u_char at_org_code[3];
110 extern u_char aarp_org_code[3];
111 #endif /* NETATALK */
113 /* netgraph node hooks for ng_ether(4) */
114 void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp);
115 void (*ng_ether_input_orphan_p)(struct ifnet *ifp,
116 struct mbuf *m, const struct ether_header *eh);
117 int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp);
118 void (*ng_ether_attach_p)(struct ifnet *ifp);
119 void (*ng_ether_detach_p)(struct ifnet *ifp);
121 int (*vlan_input_p)(struct mbuf *, struct mbuf_chain *);
123 static int ether_output(struct ifnet *, struct mbuf *, struct sockaddr *,
125 static void ether_restore_header(struct mbuf **, const struct ether_header *,
126 const struct ether_header *);
127 static void ether_demux_chain(struct ifnet *, struct mbuf *,
128 struct mbuf_chain *);
133 struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *);
134 int (*bridge_output_p)(struct ifnet *, struct mbuf *);
135 void (*bridge_dn_p)(struct mbuf *, struct ifnet *);
137 static int ether_resolvemulti(struct ifnet *, struct sockaddr **,
140 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = {
141 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
144 #define gotoerr(e) do { error = (e); goto bad; } while (0)
145 #define IFP2AC(ifp) ((struct arpcom *)(ifp))
147 static boolean_t ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst,
149 const struct ether_header *eh);
151 static int ether_ipfw;
152 static u_int ether_restore_hdr;
153 static u_int ether_prepend_hdr;
155 SYSCTL_DECL(_net_link);
156 SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");
157 SYSCTL_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW,
158 ðer_ipfw, 0, "Pass ether pkts through firewall");
159 SYSCTL_UINT(_net_link_ether, OID_AUTO, restore_hdr, CTLFLAG_RW,
160 ðer_restore_hdr, 0, "# of ether header restoration");
161 SYSCTL_UINT(_net_link_ether, OID_AUTO, prepend_hdr, CTLFLAG_RW,
162 ðer_prepend_hdr, 0,
163 "# of ether header restoration which prepends mbuf");
166 * Ethernet output routine.
167 * Encapsulate a packet of type family for the local net.
168 * Use trailer local net encapsulation if enough data in first
169 * packet leaves a multiple of 512 bytes of data in remainder.
170 * Assumes that ifp is actually pointer to arpcom structure.
173 ether_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
176 struct ether_header *eh, *deh;
179 int hlen = ETHER_HDR_LEN; /* link layer header length */
180 struct arpcom *ac = IFP2AC(ifp);
183 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
185 if (ifp->if_flags & IFF_MONITOR)
187 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) != (IFF_UP | IFF_RUNNING))
190 M_PREPEND(m, sizeof(struct ether_header), MB_DONTWAIT);
193 eh = mtod(m, struct ether_header *);
194 edst = eh->ether_dhost;
197 * Fill in the destination ethernet address and frame type.
199 switch (dst->sa_family) {
202 if (!arpresolve(ifp, rt, m, dst, edst))
203 return (0); /* if not yet resolved */
204 eh->ether_type = htons(ETHERTYPE_IP);
209 if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, edst))
210 return (0); /* Something bad happenned. */
211 eh->ether_type = htons(ETHERTYPE_IPV6);
216 if (ef_outputp != NULL) {
217 error = ef_outputp(ifp, &m, dst, &eh->ether_type,
222 eh->ether_type = htons(ETHERTYPE_IPX);
223 bcopy(&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
224 edst, ETHER_ADDR_LEN);
230 struct at_ifaddr *aa;
232 if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) {
237 * In the phase 2 case, need to prepend an mbuf for
238 * the llc header. Since we must preserve the value
239 * of m, which is passed to us by value, we m_copy()
240 * the first mbuf, and use it for our llc header.
242 if (aa->aa_flags & AFA_PHASE2) {
245 M_PREPEND(m, sizeof(struct llc), MB_DONTWAIT);
246 eh = mtod(m, struct ether_header *);
247 edst = eh->ether_dhost;
248 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
249 llc.llc_control = LLC_UI;
250 bcopy(at_org_code, llc.llc_snap_org_code,
252 llc.llc_snap_ether_type = htons(ETHERTYPE_AT);
254 mtod(m, caddr_t) + sizeof(struct ether_header),
256 eh->ether_type = htons(m->m_pkthdr.len);
257 hlen = sizeof(struct llc) + ETHER_HDR_LEN;
259 eh->ether_type = htons(ETHERTYPE_AT);
261 if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst))
270 case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
271 eh->ether_type = 0x8137;
273 case 0x0: /* Novell 802.3 */
274 eh->ether_type = htons(m->m_pkthdr.len);
276 case 0xe0e0: /* Novell 802.2 and Token-Ring */
277 M_PREPEND(m, 3, MB_DONTWAIT);
278 eh = mtod(m, struct ether_header *);
279 edst = eh->ether_dhost;
280 eh->ether_type = htons(m->m_pkthdr.len);
281 cp = mtod(m, u_char *) + sizeof(struct ether_header);
287 bcopy(&(((struct sockaddr_ns *)dst)->sns_addr.x_host), edst,
290 * XXX if ns_thishost is the same as the node's ethernet
291 * address then just the default code will catch this anyhow.
292 * So I'm not sure if this next clause should be here at all?
295 if (bcmp(edst, &ns_thishost, ETHER_ADDR_LEN) == 0) {
296 m->m_pkthdr.rcvif = ifp;
297 netisr_dispatch(NETISR_NS, m);
300 if (bcmp(edst, &ns_broadhost, ETHER_ADDR_LEN) == 0)
301 m->m_flags |= M_BCAST;
304 case pseudo_AF_HDRCMPLT:
306 loop_copy = -1; /* if this is for us, don't do it */
307 deh = (struct ether_header *)dst->sa_data;
308 memcpy(edst, deh->ether_dhost, ETHER_ADDR_LEN);
309 eh->ether_type = deh->ether_type;
313 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
314 gotoerr(EAFNOSUPPORT);
317 if (dst->sa_family == pseudo_AF_HDRCMPLT) /* unlikely */
318 memcpy(eh->ether_shost,
319 ((struct ether_header *)dst->sa_data)->ether_shost,
322 memcpy(eh->ether_shost, ac->ac_enaddr, ETHER_ADDR_LEN);
325 * Bridges require special output handling.
327 if (ifp->if_bridge) {
328 KASSERT(bridge_output_p != NULL,
329 ("%s: if_bridge not loaded!", __func__));
330 return bridge_output_p(ifp, m);
334 * If a simplex interface, and the packet is being sent to our
335 * Ethernet address or a broadcast address, loopback a copy.
336 * XXX To make a simplex device behave exactly like a duplex
337 * device, we should copy in the case of sending to our own
338 * ethernet address (thus letting the original actually appear
339 * on the wire). However, we don't do that here for security
340 * reasons and compatibility with the original behavior.
342 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
345 if (m->m_pkthdr.csum_flags & CSUM_IP)
346 csum_flags |= (CSUM_IP_CHECKED | CSUM_IP_VALID);
347 if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA)
348 csum_flags |= (CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
349 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
352 if ((n = m_copypacket(m, MB_DONTWAIT)) != NULL) {
353 n->m_pkthdr.csum_flags |= csum_flags;
354 if (csum_flags & CSUM_DATA_VALID)
355 n->m_pkthdr.csum_data = 0xffff;
356 if_simloop(ifp, n, dst->sa_family, hlen);
359 } else if (bcmp(eh->ether_dhost, eh->ether_shost,
360 ETHER_ADDR_LEN) == 0) {
361 m->m_pkthdr.csum_flags |= csum_flags;
362 if (csum_flags & CSUM_DATA_VALID)
363 m->m_pkthdr.csum_data = 0xffff;
364 if_simloop(ifp, m, dst->sa_family, hlen);
365 return (0); /* XXX */
370 if (ifp->if_carp && (error = carp_output(ifp, m, dst, NULL)))
375 /* Handle ng_ether(4) processing, if any */
376 if (ng_ether_output_p != NULL) {
377 if ((error = (*ng_ether_output_p)(ifp, &m)) != 0)
383 /* Continue with link-layer output */
384 return ether_output_frame(ifp, m);
392 * Ethernet link layer output routine to send a raw frame to the device.
394 * This assumes that the 14 byte Ethernet header is present and contiguous
398 ether_output_frame(struct ifnet *ifp, struct mbuf *m)
400 struct ip_fw *rule = NULL;
402 struct altq_pktattr pktattr;
405 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
407 /* Extract info from dummynet tag */
408 mtag = m_tag_find(m, PACKET_TAG_DUMMYNET, NULL);
410 rule = ((struct dn_pkt *)m_tag_data(mtag))->dn_priv;
412 m_tag_delete(m, mtag);
416 if (ifq_is_enabled(&ifp->if_snd))
417 altq_etherclassify(&ifp->if_snd, m, &pktattr);
419 if (IPFW_LOADED && ether_ipfw != 0) {
420 struct ether_header save_eh, *eh;
422 eh = mtod(m, struct ether_header *);
424 m_adj(m, ETHER_HDR_LEN);
425 if (!ether_ipfw_chk(&m, ifp, &rule, eh)) {
429 return ENOBUFS; /* pkt dropped */
431 return 0; /* consumed e.g. in a pipe */
434 /* packet was ok, restore the ethernet header */
435 ether_restore_header(&m, eh, &save_eh);
444 * Queue message on interface, update output statistics if
445 * successful, and start output if interface not yet active.
447 error = ifq_dispatch(ifp, m, &pktattr);
452 * ipfw processing for ethernet packets (in and out).
453 * The second parameter is NULL from ether_demux(), and ifp from
454 * ether_output_frame().
457 ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, struct ip_fw **rule,
458 const struct ether_header *eh)
460 struct ether_header save_eh = *eh; /* might be a ptr in m */
461 struct ip_fw_args args;
465 if (*rule != NULL && fw_one_pass)
466 return TRUE; /* dummynet packet, already partially processed */
469 * I need some amount of data to be contiguous.
471 i = min((*m0)->m_pkthdr.len, max_protohdr);
472 if ((*m0)->m_len < i) {
473 *m0 = m_pullup(*m0, i);
478 args.m = *m0; /* the packet we are looking at */
479 args.oif = dst; /* destination, if any */
480 if ((mtag = m_tag_find(*m0, PACKET_TAG_IPFW_DIVERT, NULL)) != NULL)
481 m_tag_delete(*m0, mtag);
482 args.rule = *rule; /* matching rule to restart */
483 args.next_hop = NULL; /* we do not support forward yet */
484 args.eh = &save_eh; /* MAC header for bridged/MAC packets */
485 i = ip_fw_chk_ptr(&args);
489 if ((i & IP_FW_PORT_DENY_FLAG) || *m0 == NULL) /* drop */
492 if (i == 0) /* a PASS rule. */
495 if (i & IP_FW_PORT_DYNT_FLAG) {
497 * Pass the pkt to dummynet, which consumes it.
501 m = *m0; /* pass the original to dummynet */
502 *m0 = NULL; /* and nothing back to the caller */
504 ether_restore_header(&m, eh, &save_eh);
508 ip_fw_dn_io_ptr(m, (i & 0xffff),
509 dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args);
513 * XXX at some point add support for divert/forward actions.
514 * If none of the above matches, we have to drop the pkt.
520 * Process a received Ethernet packet.
522 * The ethernet header is assumed to be in the mbuf so the caller
523 * MUST MAKE SURE that there are at least sizeof(struct ether_header)
524 * bytes in the first mbuf.
526 * This allows us to concentrate in one place a bunch of code which
527 * is replicated in all device drivers. Also, many functions called
528 * from ether_input() try to put the eh back into the mbuf, so we
529 * can later propagate the 'contiguous packet' interface to them.
531 * NOTA BENE: for all drivers "eh" is a pointer into the first mbuf or
532 * cluster, right before m_data. So be very careful when working on m,
533 * as you could destroy *eh !!
535 * First we perform any link layer operations, then continue to the
536 * upper layers with ether_demux().
539 ether_input_chain(struct ifnet *ifp, struct mbuf *m, struct mbuf_chain *chain)
541 struct ether_header *eh;
543 ASSERT_SERIALIZED(ifp->if_serializer);
546 /* Discard packet if interface is not up */
547 if (!(ifp->if_flags & IFF_UP)) {
552 if (m->m_len < sizeof(struct ether_header)) {
553 /* XXX error in the caller. */
557 eh = mtod(m, struct ether_header *);
559 if (ntohs(eh->ether_type) == ETHERTYPE_VLAN &&
560 (m->m_flags & M_VLANTAG) == 0) {
562 * Extract vlan tag if hardware does not do it for us
564 vlan_ether_decap(&m);
567 eh = mtod(m, struct ether_header *);
570 m->m_pkthdr.rcvif = ifp;
572 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
573 if (bcmp(ifp->if_broadcastaddr, eh->ether_dhost,
574 ifp->if_addrlen) == 0)
575 m->m_flags |= M_BCAST;
577 m->m_flags |= M_MCAST;
581 ETHER_BPF_MTAP(ifp, m);
583 ifp->if_ibytes += m->m_pkthdr.len;
585 if (ifp->if_flags & IFF_MONITOR) {
587 * Interface marked for monitoring; discard packet.
594 * Tap the packet off here for a bridge. bridge_input()
595 * will return NULL if it has consumed the packet, otherwise
596 * it gets processed as normal. Note that bridge_input()
597 * will always return the original packet if we need to
598 * process it locally.
600 if (ifp->if_bridge) {
601 KASSERT(bridge_input_p != NULL,
602 ("%s: if_bridge not loaded!", __func__));
604 if(m->m_flags & M_PROTO1) {
605 m->m_flags &= ~M_PROTO1;
607 /* clear M_PROMISC, in case the packets comes from a vlan */
608 /* m->m_flags &= ~M_PROMISC; */
609 lwkt_serialize_exit(ifp->if_serializer);
610 m = bridge_input_p(ifp, m);
611 lwkt_serialize_enter(ifp->if_serializer);
615 KASSERT(ifp == m->m_pkthdr.rcvif,
616 ("bridge_input_p changed rcvif\n"));
618 /* 'm' may be changed by bridge_input_p() */
619 eh = mtod(m, struct ether_header *);
623 /* Handle ng_ether(4) processing, if any */
624 if (ng_ether_input_p != NULL) {
625 ng_ether_input_p(ifp, &m);
629 /* 'm' may be changed by ng_ether_input_p() */
630 eh = mtod(m, struct ether_header *);
633 /* Continue with upper layer processing */
634 ether_demux_chain(ifp, m, chain);
638 ether_input(struct ifnet *ifp, struct mbuf *m)
640 ether_input_chain(ifp, m, NULL);
644 * Upper layer processing for a received Ethernet packet.
647 ether_demux_chain(struct ifnet *ifp, struct mbuf *m, struct mbuf_chain *chain)
649 struct ether_header save_eh, *eh;
652 struct ip_fw *rule = NULL;
659 KASSERT(m->m_len >= ETHER_HDR_LEN,
660 ("ether header is no contiguous!\n"));
662 eh = mtod(m, struct ether_header *);
665 /* XXX old crufty stuff, needs to be removed */
666 m_adj(m, sizeof(struct ether_header));
668 /* Extract info from dummynet tag */
669 mtag = m_tag_find(m, PACKET_TAG_DUMMYNET, NULL);
671 rule = ((struct dn_pkt *)m_tag_data(mtag))->dn_priv;
672 KKASSERT(ifp == NULL);
673 ifp = m->m_pkthdr.rcvif;
675 m_tag_delete(m, mtag);
678 if (rule) /* packet is passing the second time */
683 * XXX: Okay, we need to call carp_forus() and - if it is for
684 * us jump over code that does the normal check
685 * "ac_enaddr == ether_dhost". The check sequence is a bit
686 * different from OpenBSD, so we jump over as few code as
687 * possible, to catch _all_ sanity checks. This needs
688 * evaluation, to see if the carp ether_dhost values break any
691 if (ifp->if_carp && carp_forus(ifp->if_carp, eh->ether_dhost))
696 * Discard packet if upper layers shouldn't see it because
697 * it was unicast to a different Ethernet address. If the
698 * driver is working properly, then this situation can only
699 * happen when the interface is in promiscuous mode.
701 if (((ifp->if_flags & (IFF_PROMISC | IFF_PPROMISC)) == IFF_PROMISC) &&
702 (eh->ether_dhost[0] & 1) == 0 &&
703 bcmp(eh->ether_dhost, IFP2AC(ifp)->ac_enaddr, ETHER_ADDR_LEN)) {
709 if (IPFW_LOADED && ether_ipfw != 0) {
710 if (!ether_ipfw_chk(&m, NULL, &rule, eh)) {
716 ether_type = ntohs(save_eh.ether_type);
718 if (m->m_flags & M_VLANTAG) {
719 if (ether_type == ETHERTYPE_VLAN) {
721 * To prevent possible dangerous recursion,
722 * we don't do vlan-in-vlan
724 m->m_pkthdr.rcvif->if_noproto++;
729 if (vlan_input_p != NULL) {
730 ether_restore_header(&m, eh, &save_eh);
732 vlan_input_p(m, chain);
734 m->m_pkthdr.rcvif->if_noproto++;
739 KKASSERT(ether_type != ETHERTYPE_VLAN);
741 switch (ether_type) {
744 if (ipflow_fastforward(m, ifp->if_serializer))
750 if (ifp->if_flags & IFF_NOARP) {
751 /* Discard packet if ARP is disabled on interface */
767 if (ef_inputp && ef_inputp(ifp, &save_eh, m) == 0)
774 case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
791 if (ef_inputp && ef_inputp(ifp, &save_eh, m) == 0)
795 checksum = mtod(m, ushort *);
797 if ((ether_type <= ETHERMTU) &&
798 ((*checksum == 0xffff) || (*checksum == 0xE0E0))) {
799 if (*checksum == 0xE0E0) {
800 m->m_pkthdr.len -= 3;
809 if (ether_type > ETHERMTU)
811 l = mtod(m, struct llc *);
812 if (l->llc_dsap == LLC_SNAP_LSAP &&
813 l->llc_ssap == LLC_SNAP_LSAP &&
814 l->llc_control == LLC_UI) {
815 if (bcmp(&(l->llc_snap_org_code)[0], at_org_code,
816 sizeof at_org_code) == 0 &&
817 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) {
818 m_adj(m, sizeof(struct llc));
822 if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code,
823 sizeof aarp_org_code) == 0 &&
824 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) {
825 m_adj(m, sizeof(struct llc));
832 if (ng_ether_input_orphan_p != NULL)
833 (*ng_ether_input_orphan_p)(ifp, m, &save_eh);
839 #ifdef ETHER_INPUT_CHAIN
841 struct mbuf_chain *c;
845 port = netisr_mport(isr, &m);
849 m->m_pkthdr.header = port; /* XXX */
850 cpuid = port->mpu_td->td_gd->gd_cpuid;
853 if (c->mc_head == NULL) {
854 c->mc_head = c->mc_tail = m;
856 c->mc_tail->m_nextpkt = m;
861 #endif /* ETHER_INPUT_CHAIN */
862 netisr_dispatch(isr, m);
866 ether_demux(struct ifnet *ifp, struct mbuf *m)
868 ether_demux_chain(ifp, m, NULL);
872 * Perform common duties while attaching to interface list
876 ether_ifattach(struct ifnet *ifp, uint8_t *lla, lwkt_serialize_t serializer)
878 ether_ifattach_bpf(ifp, lla, DLT_EN10MB, sizeof(struct ether_header),
883 ether_ifattach_bpf(struct ifnet *ifp, uint8_t *lla, u_int dlt, u_int hdrlen,
884 lwkt_serialize_t serializer)
886 struct sockaddr_dl *sdl;
888 ifp->if_type = IFT_ETHER;
889 ifp->if_addrlen = ETHER_ADDR_LEN;
890 ifp->if_hdrlen = ETHER_HDR_LEN;
891 if_attach(ifp, serializer);
892 ifp->if_mtu = ETHERMTU;
893 if (ifp->if_baudrate == 0)
894 ifp->if_baudrate = 10000000;
895 ifp->if_output = ether_output;
896 ifp->if_input = ether_input;
897 ifp->if_resolvemulti = ether_resolvemulti;
898 ifp->if_broadcastaddr = etherbroadcastaddr;
899 sdl = IF_LLSOCKADDR(ifp);
900 sdl->sdl_type = IFT_ETHER;
901 sdl->sdl_alen = ifp->if_addrlen;
902 bcopy(lla, LLADDR(sdl), ifp->if_addrlen);
904 * XXX Keep the current drivers happy.
905 * XXX Remove once all drivers have been cleaned up
907 if (lla != IFP2AC(ifp)->ac_enaddr)
908 bcopy(lla, IFP2AC(ifp)->ac_enaddr, ifp->if_addrlen);
909 bpfattach(ifp, dlt, hdrlen);
910 if (ng_ether_attach_p != NULL)
911 (*ng_ether_attach_p)(ifp);
913 if_printf(ifp, "MAC address: %6D\n", lla, ":");
917 * Perform common duties while detaching an Ethernet interface
920 ether_ifdetach(struct ifnet *ifp)
924 if (ng_ether_detach_p != NULL)
925 (*ng_ether_detach_p)(ifp);
931 ether_ioctl(struct ifnet *ifp, int command, caddr_t data)
933 struct ifaddr *ifa = (struct ifaddr *) data;
934 struct ifreq *ifr = (struct ifreq *) data;
937 #define IF_INIT(ifp) \
939 if (((ifp)->if_flags & IFF_UP) == 0) { \
940 (ifp)->if_flags |= IFF_UP; \
941 (ifp)->if_init((ifp)->if_softc); \
945 ASSERT_SERIALIZED(ifp->if_serializer);
949 switch (ifa->ifa_addr->sa_family) {
952 IF_INIT(ifp); /* before arpwhohas */
953 arp_ifinit(ifp, ifa);
958 * XXX - This code is probably wrong
962 struct ipx_addr *ina = &IA_SIPX(ifa)->sipx_addr;
963 struct arpcom *ac = IFP2AC(ifp);
965 if (ipx_nullhost(*ina))
966 ina->x_host = *(union ipx_host *) ac->ac_enaddr;
968 bcopy(ina->x_host.c_host, ac->ac_enaddr,
969 sizeof ac->ac_enaddr);
971 IF_INIT(ifp); /* Set new address. */
977 * XXX - This code is probably wrong
981 struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
982 struct arpcom *ac = IFP2AC(ifp);
984 if (ns_nullhost(*ina))
985 ina->x_host = *(union ns_host *)(ac->ac_enaddr);
987 bcopy(ina->x_host.c_host, ac->ac_enaddr,
988 sizeof ac->ac_enaddr);
1004 bcopy(IFP2AC(ifp)->ac_enaddr,
1005 ((struct sockaddr *)ifr->ifr_data)->sa_data,
1011 * Set the interface MTU.
1013 if (ifr->ifr_mtu > ETHERMTU) {
1016 ifp->if_mtu = ifr->ifr_mtu;
1031 struct sockaddr **llsa,
1032 struct sockaddr *sa)
1034 struct sockaddr_dl *sdl;
1035 struct sockaddr_in *sin;
1037 struct sockaddr_in6 *sin6;
1041 switch(sa->sa_family) {
1044 * No mapping needed. Just check that it's a valid MC address.
1046 sdl = (struct sockaddr_dl *)sa;
1047 e_addr = LLADDR(sdl);
1048 if ((e_addr[0] & 1) != 1)
1049 return EADDRNOTAVAIL;
1055 sin = (struct sockaddr_in *)sa;
1056 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
1057 return EADDRNOTAVAIL;
1058 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
1060 sdl->sdl_len = sizeof *sdl;
1061 sdl->sdl_family = AF_LINK;
1062 sdl->sdl_index = ifp->if_index;
1063 sdl->sdl_type = IFT_ETHER;
1064 sdl->sdl_alen = ETHER_ADDR_LEN;
1065 e_addr = LLADDR(sdl);
1066 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
1067 *llsa = (struct sockaddr *)sdl;
1072 sin6 = (struct sockaddr_in6 *)sa;
1073 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1075 * An IP6 address of 0 means listen to all
1076 * of the Ethernet multicast address used for IP6.
1077 * (This is used for multicast routers.)
1079 ifp->if_flags |= IFF_ALLMULTI;
1083 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
1084 return EADDRNOTAVAIL;
1085 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
1087 sdl->sdl_len = sizeof *sdl;
1088 sdl->sdl_family = AF_LINK;
1089 sdl->sdl_index = ifp->if_index;
1090 sdl->sdl_type = IFT_ETHER;
1091 sdl->sdl_alen = ETHER_ADDR_LEN;
1092 e_addr = LLADDR(sdl);
1093 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
1094 *llsa = (struct sockaddr *)sdl;
1100 * Well, the text isn't quite right, but it's the name
1103 return EAFNOSUPPORT;
1109 * This is for reference. We have a table-driven version
1110 * of the little-endian crc32 generator, which is faster
1111 * than the double-loop.
1114 ether_crc32_le(const uint8_t *buf, size_t len)
1116 uint32_t c, crc, carry;
1119 crc = 0xffffffffU; /* initial value */
1121 for (i = 0; i < len; i++) {
1123 for (j = 0; j < 8; j++) {
1124 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01);
1128 crc = (crc ^ ETHER_CRC_POLY_LE);
1136 ether_crc32_le(const uint8_t *buf, size_t len)
1138 static const uint32_t crctab[] = {
1139 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
1140 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
1141 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
1142 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
1147 crc = 0xffffffffU; /* initial value */
1149 for (i = 0; i < len; i++) {
1151 crc = (crc >> 4) ^ crctab[crc & 0xf];
1152 crc = (crc >> 4) ^ crctab[crc & 0xf];
1160 ether_crc32_be(const uint8_t *buf, size_t len)
1162 uint32_t c, crc, carry;
1165 crc = 0xffffffffU; /* initial value */
1167 for (i = 0; i < len; i++) {
1169 for (j = 0; j < 8; j++) {
1170 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01);
1174 crc = (crc ^ ETHER_CRC_POLY_BE) | carry;
1182 * find the size of ethernet header, and call classifier
1185 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m,
1186 struct altq_pktattr *pktattr)
1188 struct ether_header *eh;
1189 uint16_t ether_type;
1190 int hlen, af, hdrsize;
1193 hlen = sizeof(struct ether_header);
1194 eh = mtod(m, struct ether_header *);
1196 ether_type = ntohs(eh->ether_type);
1197 if (ether_type < ETHERMTU) {
1199 struct llc *llc = (struct llc *)(eh + 1);
1202 if (m->m_len < hlen ||
1203 llc->llc_dsap != LLC_SNAP_LSAP ||
1204 llc->llc_ssap != LLC_SNAP_LSAP ||
1205 llc->llc_control != LLC_UI)
1206 goto bad; /* not snap! */
1208 ether_type = ntohs(llc->llc_un.type_snap.ether_type);
1211 if (ether_type == ETHERTYPE_IP) {
1213 hdrsize = 20; /* sizeof(struct ip) */
1215 } else if (ether_type == ETHERTYPE_IPV6) {
1217 hdrsize = 40; /* sizeof(struct ip6_hdr) */
1222 while (m->m_len <= hlen) {
1226 hdr = m->m_data + hlen;
1227 if (m->m_len < hlen + hdrsize) {
1229 * ip header is not in a single mbuf. this should not
1230 * happen in the current code.
1231 * (todo: use m_pulldown in the future)
1237 ifq_classify(ifq, m, af, pktattr);
1244 pktattr->pattr_class = NULL;
1245 pktattr->pattr_hdr = NULL;
1246 pktattr->pattr_af = AF_UNSPEC;
1250 ether_restore_header(struct mbuf **m0, const struct ether_header *eh,
1251 const struct ether_header *save_eh)
1253 struct mbuf *m = *m0;
1255 ether_restore_hdr++;
1258 * Prepend the header, optimize for the common case of
1259 * eh pointing into the mbuf.
1261 if ((const void *)(eh + 1) == (void *)m->m_data) {
1262 m->m_data -= ETHER_HDR_LEN;
1263 m->m_len += ETHER_HDR_LEN;
1264 m->m_pkthdr.len += ETHER_HDR_LEN;
1266 ether_prepend_hdr++;
1268 M_PREPEND(m, ETHER_HDR_LEN, MB_DONTWAIT);
1270 bcopy(save_eh, mtod(m, struct ether_header *),
1277 #ifdef ETHER_INPUT_CHAIN
1280 ether_input_ipifunc(void *arg)
1282 struct mbuf *m, *next;
1287 next = m->m_nextpkt;
1288 m->m_nextpkt = NULL;
1290 port = m->m_pkthdr.header;
1291 m->m_pkthdr.header = NULL;
1294 &m->m_hdr.mh_netmsg.nm_netmsg.nm_lmsg);
1297 } while (m != NULL);
1301 ether_input_dispatch(struct mbuf_chain *chain)
1306 for (i = 0; i < ncpus; ++i) {
1307 if (chain[i].mc_head != NULL) {
1308 lwkt_send_ipiq(globaldata_find(i),
1309 ether_input_ipifunc, chain[i].mc_head);
1313 ether_input_ipifunc(chain->mc_head);
1317 #endif /* ETHER_INPUT_CHAIN */