1c398230bSWarner Losh /*- 2df8bae1dSRodney W. Grimes * Copyright (c) 1982, 1989, 1993 3df8bae1dSRodney W. Grimes * The Regents of the University of California. All rights reserved. 4df8bae1dSRodney W. Grimes * 5df8bae1dSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 6df8bae1dSRodney W. Grimes * modification, are permitted provided that the following conditions 7df8bae1dSRodney W. Grimes * are met: 8df8bae1dSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 9df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 10df8bae1dSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 11df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 12df8bae1dSRodney W. Grimes * documentation and/or other materials provided with the distribution. 13df8bae1dSRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 14df8bae1dSRodney W. Grimes * may be used to endorse or promote products derived from this software 15df8bae1dSRodney W. Grimes * without specific prior written permission. 16df8bae1dSRodney W. Grimes * 17df8bae1dSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18df8bae1dSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19df8bae1dSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20df8bae1dSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21df8bae1dSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22df8bae1dSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23df8bae1dSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24df8bae1dSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25df8bae1dSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26df8bae1dSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27df8bae1dSRodney W. Grimes * SUCH DAMAGE. 28df8bae1dSRodney W. Grimes * 29df8bae1dSRodney W. Grimes * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93 30c3aac50fSPeter Wemm * $FreeBSD$ 31df8bae1dSRodney W. Grimes */ 32df8bae1dSRodney W. Grimes 331d5e9e22SEivind Eklund #include "opt_inet.h" 34cfa1ca9dSYoshinobu Inoue #include "opt_inet6.h" 354cf49a43SJulian Elischer #include "opt_netgraph.h" 366eeac1d9SJulian Elischer #include "opt_mbuf_profiling.h" 377527624eSRobert Watson #include "opt_rss.h" 38430df5f4SEivind Eklund 39df8bae1dSRodney W. Grimes #include <sys/param.h> 40df8bae1dSRodney W. Grimes #include <sys/systm.h> 41df8bae1dSRodney W. Grimes #include <sys/kernel.h> 42385195c0SMarko Zec #include <sys/lock.h> 43df8bae1dSRodney W. Grimes #include <sys/malloc.h> 4441ee9f1cSPoul-Henning Kamp #include <sys/module.h> 45df8bae1dSRodney W. Grimes #include <sys/mbuf.h> 4610b1fde0SMark Murray #include <sys/random.h> 47df8bae1dSRodney W. Grimes #include <sys/socket.h> 4851a53488SBruce Evans #include <sys/sockio.h> 49602d513cSGarrett Wollman #include <sys/sysctl.h> 50ef1f9169SMarcel Moolenaar #include <sys/uuid.h> 51df8bae1dSRodney W. Grimes 52df8bae1dSRodney W. Grimes #include <net/if.h> 5376039bc8SGleb Smirnoff #include <net/if_var.h> 54d7647d96SDag-Erling Smørgrav #include <net/if_arp.h> 55df8bae1dSRodney W. Grimes #include <net/netisr.h> 56df8bae1dSRodney W. Grimes #include <net/route.h> 57df8bae1dSRodney W. Grimes #include <net/if_llc.h> 58df8bae1dSRodney W. Grimes #include <net/if_dl.h> 59df8bae1dSRodney W. Grimes #include <net/if_types.h> 602e2de7f2SArchie Cobbs #include <net/bpf.h> 61e1e1452dSArchie Cobbs #include <net/ethernet.h> 62fd6238a6SAndrew Thompson #include <net/if_bridgevar.h> 63c1d93b05SSam Leffler #include <net/if_vlan_var.h> 646e6b3f7cSQing Li #include <net/if_llatbl.h> 657d4317bdSAlexander V. Chernikov #include <net/pfil.h> 664b79449eSBjoern A. Zeeb #include <net/vnet.h> 67df8bae1dSRodney W. Grimes 6875bf2db3SGleb Smirnoff #include <netpfil/pf/pf_mtag.h> 6975bf2db3SGleb Smirnoff 7082cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 71df8bae1dSRodney W. Grimes #include <netinet/in.h> 72df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 73df8bae1dSRodney W. Grimes #include <netinet/if_ether.h> 747527624eSRobert Watson #include <netinet/in_rss.h> 7554bfbd51SWill Andrews #include <netinet/ip_carp.h> 760bcfa8e4SLuigi Rizzo #include <netinet/ip_var.h> 771d5e9e22SEivind Eklund #endif 7882cd038dSYoshinobu Inoue #ifdef INET6 7982cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 8082cd038dSYoshinobu Inoue #endif 81aed55708SRobert Watson #include <security/mac/mac_framework.h> 82aed55708SRobert Watson 83d54d93acSEd Maste #ifdef CTASSERT 84d54d93acSEd Maste CTASSERT(sizeof (struct ether_header) == ETHER_ADDR_LEN * 2 + 2); 85d54d93acSEd Maste CTASSERT(sizeof (struct ether_addr) == ETHER_ADDR_LEN); 86d54d93acSEd Maste #endif 87d54d93acSEd Maste 887d4317bdSAlexander V. Chernikov VNET_DEFINE(struct pfil_head, link_pfil_hook); /* Packet filter hooks */ 897d4317bdSAlexander V. Chernikov 90e1e1452dSArchie Cobbs /* netgraph node hooks for ng_ether(4) */ 91c1d93b05SSam Leffler void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 92c1d93b05SSam Leffler void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 93e1e1452dSArchie Cobbs int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 94e1e1452dSArchie Cobbs void (*ng_ether_attach_p)(struct ifnet *ifp); 95e1e1452dSArchie Cobbs void (*ng_ether_detach_p)(struct ifnet *ifp); 96e1e1452dSArchie Cobbs 97824eb9dcSDavid E. O'Brien void (*vlan_input_p)(struct ifnet *, struct mbuf *); 989d4fe4b2SBrooks Davis 99fd6238a6SAndrew Thompson /* if_bridge(4) support */ 1008f867517SAndrew Thompson struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *); 1018f867517SAndrew Thompson int (*bridge_output_p)(struct ifnet *, struct mbuf *, 1028f867517SAndrew Thompson struct sockaddr *, struct rtentry *); 103c8b01292SAndrew Thompson void (*bridge_dn_p)(struct mbuf *, struct ifnet *); 1048f867517SAndrew Thompson 10518242d3bSAndrew Thompson /* if_lagg(4) support */ 10618242d3bSAndrew Thompson struct mbuf *(*lagg_input_p)(struct ifnet *, struct mbuf *); 107b47888ceSAndrew Thompson 108e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 109868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 110868d8b62SMatthew N. Dodd 111929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 112929ddbbbSAlfred Perlstein struct sockaddr *); 113d3c351c5SMarko Zec #ifdef VIMAGE 114d3c351c5SMarko Zec static void ether_reassign(struct ifnet *, struct vnet *, char *); 115d3c351c5SMarko Zec #endif 116868d8b62SMatthew N. Dodd 11769462a82SBruce M Simpson #define ETHER_IS_BROADCAST(addr) \ 11869462a82SBruce M Simpson (bcmp(etherbroadcastaddr, (addr), ETHER_ADDR_LEN) == 0) 11969462a82SBruce M Simpson 1204c8e8c05SJulian Elischer #define senderr(e) do { error = (e); goto bad;} while (0) 121df8bae1dSRodney W. Grimes 12222f8ce43SAlexander V. Chernikov static void 12322f8ce43SAlexander V. Chernikov update_mbuf_csumflags(struct mbuf *src, struct mbuf *dst) 12422f8ce43SAlexander V. Chernikov { 12522f8ce43SAlexander V. Chernikov int csum_flags = 0; 12622f8ce43SAlexander V. Chernikov 12722f8ce43SAlexander V. Chernikov if (src->m_pkthdr.csum_flags & CSUM_IP) 12822f8ce43SAlexander V. Chernikov csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 12922f8ce43SAlexander V. Chernikov if (src->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 13022f8ce43SAlexander V. Chernikov csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 13122f8ce43SAlexander V. Chernikov if (src->m_pkthdr.csum_flags & CSUM_SCTP) 13222f8ce43SAlexander V. Chernikov csum_flags |= CSUM_SCTP_VALID; 13322f8ce43SAlexander V. Chernikov dst->m_pkthdr.csum_flags |= csum_flags; 13422f8ce43SAlexander V. Chernikov if (csum_flags & CSUM_DATA_VALID) 13522f8ce43SAlexander V. Chernikov dst->m_pkthdr.csum_data = 0xffff; 13622f8ce43SAlexander V. Chernikov } 13722f8ce43SAlexander V. Chernikov 138df8bae1dSRodney W. Grimes /* 139df8bae1dSRodney W. Grimes * Ethernet output routine. 140df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 141df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 142df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 143df8bae1dSRodney W. Grimes */ 144df8bae1dSRodney W. Grimes int 14572fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 14647e8d432SGleb Smirnoff const struct sockaddr *dst, struct route *ro) 147df8bae1dSRodney W. Grimes { 148df8bae1dSRodney W. Grimes short type; 149279aa3d4SKip Macy int error = 0, hdrcmplt = 0; 150c69aeaadSAlexander V. Chernikov u_char edst[ETHER_ADDR_LEN]; 1516e6b3f7cSQing Li struct llentry *lle = NULL; 152279aa3d4SKip Macy struct rtentry *rt0 = NULL; 153098a8c3bSMatthew N. Dodd struct ether_header *eh; 15460ee3847SMax Laier struct pf_mtag *t; 155c54c76ccSOleg Bulyzhin int loop_copy = 1; 156d32864c3SRobert Watson int hlen; /* link layer header length */ 157df8bae1dSRodney W. Grimes 158279aa3d4SKip Macy if (ro != NULL) { 1599fca4f79SQing Li if (!(m->m_flags & (M_BCAST | M_MCAST))) 160279aa3d4SKip Macy lle = ro->ro_lle; 161279aa3d4SKip Macy rt0 = ro->ro_rt; 162279aa3d4SKip Macy } 16343b29369SRobert Watson #ifdef MAC 16430d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 16543b29369SRobert Watson if (error) 16643b29369SRobert Watson senderr(error); 16743b29369SRobert Watson #endif 16843b29369SRobert Watson 1696eeac1d9SJulian Elischer M_PROFILE(m); 170afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 171afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 17213f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 17313f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 174df8bae1dSRodney W. Grimes senderr(ENETDOWN); 1757f760c48SMatthew N. Dodd 17684dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 177df8bae1dSRodney W. Grimes switch (dst->sa_family) { 178df8bae1dSRodney W. Grimes #ifdef INET 179df8bae1dSRodney W. Grimes case AF_INET: 180279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 181279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 182279aa3d4SKip Macy else 1836e6b3f7cSQing Li error = arpresolve(ifp, rt0, m, dst, edst, &lle); 184cd46a114SLuigi Rizzo if (error) 185cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 18634bed8b0SDavid Greenman type = htons(ETHERTYPE_IP); 187df8bae1dSRodney W. Grimes break; 18843a6c75aSMatthew N. Dodd case AF_ARP: 18943a6c75aSMatthew N. Dodd { 19043a6c75aSMatthew N. Dodd struct arphdr *ah; 19143a6c75aSMatthew N. Dodd ah = mtod(m, struct arphdr *); 19243a6c75aSMatthew N. Dodd ah->ar_hrd = htons(ARPHRD_ETHER); 19343a6c75aSMatthew N. Dodd 194c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 19543a6c75aSMatthew N. Dodd 19643a6c75aSMatthew N. Dodd switch(ntohs(ah->ar_op)) { 19743a6c75aSMatthew N. Dodd case ARPOP_REVREQUEST: 19843a6c75aSMatthew N. Dodd case ARPOP_REVREPLY: 19943a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_REVARP); 20043a6c75aSMatthew N. Dodd break; 20143a6c75aSMatthew N. Dodd case ARPOP_REQUEST: 20243a6c75aSMatthew N. Dodd case ARPOP_REPLY: 20343a6c75aSMatthew N. Dodd default: 20443a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_ARP); 20543a6c75aSMatthew N. Dodd break; 20643a6c75aSMatthew N. Dodd } 20743a6c75aSMatthew N. Dodd 20843a6c75aSMatthew N. Dodd if (m->m_flags & M_BCAST) 20943a6c75aSMatthew N. Dodd bcopy(ifp->if_broadcastaddr, edst, ETHER_ADDR_LEN); 21043a6c75aSMatthew N. Dodd else 21143a6c75aSMatthew N. Dodd bcopy(ar_tha(ah), edst, ETHER_ADDR_LEN); 21243a6c75aSMatthew N. Dodd 21343a6c75aSMatthew N. Dodd } 21443a6c75aSMatthew N. Dodd break; 215df8bae1dSRodney W. Grimes #endif 21682cd038dSYoshinobu Inoue #ifdef INET6 21782cd038dSYoshinobu Inoue case AF_INET6: 218279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 219279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 220279aa3d4SKip Macy else 2219928dafbSQing Li error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle); 222cd46a114SLuigi Rizzo if (error) 223cd46a114SLuigi Rizzo return error; 22482cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 22582cd038dSYoshinobu Inoue break; 22682cd038dSYoshinobu Inoue #endif 227114ae644SMike Smith case pseudo_AF_HDRCMPLT: 22847e8d432SGleb Smirnoff { 229114ae644SMike Smith hdrcmplt = 1; 230114ae644SMike Smith /* FALLTHROUGH */ 231114ae644SMike Smith 232df8bae1dSRodney W. Grimes case AF_UNSPEC: 233c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 234c69aeaadSAlexander V. Chernikov eh = (struct ether_header *)dst->sa_data; 23594a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 236df8bae1dSRodney W. Grimes type = eh->ether_type; 237df8bae1dSRodney W. Grimes break; 23847e8d432SGleb Smirnoff } 239df8bae1dSRodney W. Grimes default: 24029e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 241df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 242df8bae1dSRodney W. Grimes } 243df8bae1dSRodney W. Grimes 2446e6b3f7cSQing Li if (lle != NULL && (lle->la_flags & LLE_IFADDR)) { 24522f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, m); 2466e6b3f7cSQing Li return (if_simloop(ifp, m, dst->sa_family, 0)); 2476e6b3f7cSQing Li } 2486e6b3f7cSQing Li 249df8bae1dSRodney W. Grimes /* 250df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 251df8bae1dSRodney W. Grimes * allocate another. 252df8bae1dSRodney W. Grimes */ 253eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_HDR_LEN, M_NOWAIT); 2542166ffe8SRobert Watson if (m == NULL) 255df8bae1dSRodney W. Grimes senderr(ENOBUFS); 256df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 257c69aeaadSAlexander V. Chernikov if (hdrcmplt == 0) { 258c69aeaadSAlexander V. Chernikov memcpy(&eh->ether_type, &type, sizeof(eh->ether_type)); 259c69aeaadSAlexander V. Chernikov memcpy(eh->ether_dhost, edst, sizeof (edst)); 260c69aeaadSAlexander V. Chernikov memcpy(eh->ether_shost, IF_LLADDR(ifp),sizeof(eh->ether_shost)); 261c69aeaadSAlexander V. Chernikov } 262ed7509acSJulian Elischer 263ed7509acSJulian Elischer /* 264ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 265ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 266ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 267ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 268ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 269ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 270ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 271ed7509acSJulian Elischer */ 272c54c76ccSOleg Bulyzhin if ((ifp->if_flags & IFF_SIMPLEX) && loop_copy && 27360ee3847SMax Laier ((t = pf_find_mtag(m)) == NULL || !t->routed)) { 274c54c76ccSOleg Bulyzhin if (m->m_flags & M_BCAST) { 27506f684b0SMatthew N. Dodd struct mbuf *n; 276ed7509acSJulian Elischer 277294dd290SLuigi Rizzo /* 278294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 279294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 280294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 281294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 282294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 283294dd290SLuigi Rizzo * extra data copying vs. extra locking). 2849983b3c0SYaroslav Tykhiy * 2859983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 2869983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 2879983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 288294dd290SLuigi Rizzo */ 289eb1b1807SGleb Smirnoff if ((n = m_dup(m, M_NOWAIT)) != NULL) { 29022f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, n); 29106a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 292c1404dc0SArchie Cobbs } else 2933751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 29406f684b0SMatthew N. Dodd } else if (bcmp(eh->ether_dhost, eh->ether_shost, 29506f684b0SMatthew N. Dodd ETHER_ADDR_LEN) == 0) { 29622f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, m); 29706a429a3SArchie Cobbs (void) if_simloop(ifp, m, dst->sa_family, hlen); 298ed7509acSJulian Elischer return (0); /* XXX */ 299ed7509acSJulian Elischer } 300ed7509acSJulian Elischer } 3012e2de7f2SArchie Cobbs 3023f7d1396SAndrew Thompson /* 3033f7d1396SAndrew Thompson * Bridges require special output handling. 3043f7d1396SAndrew Thompson */ 3053f7d1396SAndrew Thompson if (ifp->if_bridge) { 3063f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 3073f7d1396SAndrew Thompson return (error); 3083f7d1396SAndrew Thompson } 3093f7d1396SAndrew Thompson 310259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 311a9771948SGleb Smirnoff if (ifp->if_carp && 31208b68b0eSGleb Smirnoff (error = (*carp_output_p)(ifp, m, dst))) 313a9771948SGleb Smirnoff goto bad; 314a9771948SGleb Smirnoff #endif 315a9771948SGleb Smirnoff 316e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 317833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 318514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 319514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 320e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 321e1e1452dSArchie Cobbs bad: if (m != NULL) 322e1e1452dSArchie Cobbs m_freem(m); 323e1e1452dSArchie Cobbs return (error); 324e1e1452dSArchie Cobbs } 325e1e1452dSArchie Cobbs if (m == NULL) 326e1e1452dSArchie Cobbs return (0); 327e1e1452dSArchie Cobbs } 328e1e1452dSArchie Cobbs 329e1e1452dSArchie Cobbs /* Continue with link-layer output */ 330e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 331e1e1452dSArchie Cobbs } 332e1e1452dSArchie Cobbs 333e1e1452dSArchie Cobbs /* 334e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 335e1e1452dSArchie Cobbs * 336e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 337e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 338e1e1452dSArchie Cobbs */ 339e1e1452dSArchie Cobbs int 340c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 341e1e1452dSArchie Cobbs { 3427d4317bdSAlexander V. Chernikov int i; 3432b25acc1SLuigi Rizzo 3447d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook)) { 3457d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_OUT, NULL); 3467d4317bdSAlexander V. Chernikov 3477d4317bdSAlexander V. Chernikov if (i != 0) 3487d4317bdSAlexander V. Chernikov return (EACCES); 3497d4317bdSAlexander V. Chernikov 3507d4317bdSAlexander V. Chernikov if (m == NULL) 3517d4317bdSAlexander V. Chernikov return (0); 3524b984093SLuigi Rizzo } 3532b25acc1SLuigi Rizzo 354df8bae1dSRodney W. Grimes /* 355df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 356df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 357df8bae1dSRodney W. Grimes */ 358aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 359df8bae1dSRodney W. Grimes } 360df8bae1dSRodney W. Grimes 361d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 362d7647d96SDag-Erling Smørgrav #endif 3634b984093SLuigi Rizzo 3644b984093SLuigi Rizzo /* 365c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 366c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 367df8bae1dSRodney W. Grimes */ 368c1d93b05SSam Leffler static void 3696cb52192SRobert Watson ether_input_internal(struct ifnet *ifp, struct mbuf *m) 370df8bae1dSRodney W. Grimes { 371c1d93b05SSam Leffler struct ether_header *eh; 372c1d93b05SSam Leffler u_short etype; 373df8bae1dSRodney W. Grimes 37469462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 37569462a82SBruce M Simpson m_freem(m); 37669462a82SBruce M Simpson return; 37769462a82SBruce M Simpson } 37869462a82SBruce M Simpson #ifdef DIAGNOSTIC 37969462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 38069462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 38169462a82SBruce M Simpson m_freem(m); 38269462a82SBruce M Simpson return; 38369462a82SBruce M Simpson } 38469462a82SBruce M Simpson #endif 385c1d93b05SSam Leffler /* 386c1d93b05SSam Leffler * Do consistency checks to verify assumptions 387c1d93b05SSam Leffler * made by code past this point. 388c1d93b05SSam Leffler */ 389c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 390c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 3913751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 392c939f1aeSLuigi Rizzo m_freem(m); 393c939f1aeSLuigi Rizzo return; 394c939f1aeSLuigi Rizzo } 395797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 396c1d93b05SSam Leffler /* XXX maybe should pullup? */ 397c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 398c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 399c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 4003751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 401c1d93b05SSam Leffler m_freem(m); 402c1d93b05SSam Leffler return; 4032e2de7f2SArchie Cobbs } 404c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 405c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 406c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 407c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 4083751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 409c1d93b05SSam Leffler m_freem(m); 410c1d93b05SSam Leffler return; 411c1d93b05SSam Leffler } 412c1d93b05SSam Leffler #ifdef DIAGNOSTIC 413c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 4149bf40edeSBrooks Davis if_printf(ifp, "Warning, frame marked as received on %s\n", 4159bf40edeSBrooks Davis m->m_pkthdr.rcvif->if_xname); 416c1d93b05SSam Leffler } 417c1d93b05SSam Leffler #endif 418c1d93b05SSam Leffler 41921ca7b57SMarko Zec CURVNET_SET_QUIET(ifp->if_vnet); 42021ca7b57SMarko Zec 42169462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 42269462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 42369462a82SBruce M Simpson m->m_flags |= M_BCAST; 42469462a82SBruce M Simpson else 42569462a82SBruce M Simpson m->m_flags |= M_MCAST; 4263751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1); 42769462a82SBruce M Simpson } 42869462a82SBruce M Simpson 429533d8562SRobert Watson #ifdef MAC 430533d8562SRobert Watson /* 431533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 432533d8562SRobert Watson * consumers can get to it. 433533d8562SRobert Watson */ 43430d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 435533d8562SRobert Watson #endif 436533d8562SRobert Watson 437c1d93b05SSam Leffler /* 43869462a82SBruce M Simpson * Give bpf a chance at the packet. 439c1d93b05SSam Leffler */ 440d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 4412e2de7f2SArchie Cobbs 44269462a82SBruce M Simpson /* 44369462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 44469462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 44569462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 44669462a82SBruce M Simpson */ 447c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 448c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 449c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 450c1d93b05SSam Leffler } 451c1d93b05SSam Leffler 4524cdc1f54SGleb Smirnoff if (!(ifp->if_capenable & IFCAP_HWSTATS)) 4533751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 45405463bb5SDavid Greenman 45569462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 456de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 457de572b37SChristian S.J. Peron m_freem(m); 45821ca7b57SMarko Zec CURVNET_RESTORE(); 459de572b37SChristian S.J. Peron return; 460de572b37SChristian S.J. Peron } 461de572b37SChristian S.J. Peron 46218242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 463b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 46418242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 46518242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 46618242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 467b47888ceSAndrew Thompson if (m != NULL) 468b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 4692db13e75SMarko Zec else { 4702db13e75SMarko Zec CURVNET_RESTORE(); 471b47888ceSAndrew Thompson return; 472b47888ceSAndrew Thompson } 4732db13e75SMarko Zec } 474b47888ceSAndrew Thompson 47569462a82SBruce M Simpson /* 47669462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 47769462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 47869462a82SBruce M Simpson * path correctly. 47969462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 48069462a82SBruce M Simpson */ 48169462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 48269462a82SBruce M Simpson struct ether_vlan_header *evl; 48369462a82SBruce M Simpson 48469462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 48569462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 486402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 48769462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 488402d5e27SBruce M Simpson #endif 4893751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 49069462a82SBruce M Simpson m_freem(m); 4912db13e75SMarko Zec CURVNET_RESTORE(); 49269462a82SBruce M Simpson return; 49369462a82SBruce M Simpson } 49469462a82SBruce M Simpson 49569462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 49669462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 49769462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 49869462a82SBruce M Simpson 49969462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 50069462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 50169462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 50297cce87fSGleb Smirnoff eh = mtod(m, struct ether_header *); 50369462a82SBruce M Simpson } 50469462a82SBruce M Simpson 505a34c6aebSBjoern A. Zeeb M_SETFIB(m, ifp->if_fib); 506a34c6aebSBjoern A. Zeeb 50769462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 508833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 509514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 51069462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 51169462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 512c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 51321ca7b57SMarko Zec if (m == NULL) { 51421ca7b57SMarko Zec CURVNET_RESTORE(); 515e1e1452dSArchie Cobbs return; 516e1e1452dSArchie Cobbs } 5175e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 51821ca7b57SMarko Zec } 519e1e1452dSArchie Cobbs 5208f867517SAndrew Thompson /* 52169462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 52269462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 52369462a82SBruce M Simpson * and the frame should be delivered locally. 5248f867517SAndrew Thompson */ 52569462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 52669462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 527fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 52821ca7b57SMarko Zec if (m == NULL) { 52921ca7b57SMarko Zec CURVNET_RESTORE(); 5308f867517SAndrew Thompson return; 5318f867517SAndrew Thompson } 5325e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 53321ca7b57SMarko Zec } 5348f867517SAndrew Thompson 535259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 53669462a82SBruce M Simpson /* 53769462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 53869462a82SBruce M Simpson * mbuf flows up to Layer 3. 53969462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 54069462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 54169462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 54269462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 54369462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 54469462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 54569462a82SBruce M Simpson */ 54654bfbd51SWill Andrews if (ifp->if_carp && (*carp_forus_p)(ifp, eh->ether_dhost)) { 54769462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 54869462a82SBruce M Simpson } else 54969462a82SBruce M Simpson #endif 55069462a82SBruce M Simpson { 55169462a82SBruce M Simpson /* 552e7f8c833SBruce M Simpson * If the frame received was not for our MAC address, set the 55369462a82SBruce M Simpson * M_PROMISC flag on the mbuf chain. The frame may need to 55469462a82SBruce M Simpson * be seen by the rest of the Ethernet input path in case of 55569462a82SBruce M Simpson * re-entry (e.g. bridge, vlan, netgraph) but should not be 55669462a82SBruce M Simpson * seen by upper protocol layers. 55769462a82SBruce M Simpson */ 55869462a82SBruce M Simpson if (!ETHER_IS_MULTICAST(eh->ether_dhost) && 559e7f8c833SBruce M Simpson bcmp(IF_LLADDR(ifp), eh->ether_dhost, ETHER_ADDR_LEN) != 0) 56069462a82SBruce M Simpson m->m_flags |= M_PROMISC; 56169462a82SBruce M Simpson } 56269462a82SBruce M Simpson 563dd50b310SAdrian Chadd random_harvest(&(m->m_data), 12, 2, RANDOM_NET_ETHER); 56469462a82SBruce M Simpson 565acf032f5SRobert Watson ether_demux(ifp, m); 56621ca7b57SMarko Zec CURVNET_RESTORE(); 567e1e1452dSArchie Cobbs } 568e1e1452dSArchie Cobbs 569e1e1452dSArchie Cobbs /* 5706cb52192SRobert Watson * Ethernet input dispatch; by default, direct dispatch here regardless of 5717527624eSRobert Watson * global configuration. However, if RSS is enabled, hook up RSS affinity 5727527624eSRobert Watson * so that when deferred or hybrid dispatch is enabled, we can redistribute 5737527624eSRobert Watson * load based on RSS. 5747527624eSRobert Watson * 5757527624eSRobert Watson * XXXRW: Would be nice if the ifnet passed up a flag indicating whether or 5767527624eSRobert Watson * not it had already done work distribution via multi-queue. Then we could 5777527624eSRobert Watson * direct dispatch in the event load balancing was already complete and 5787527624eSRobert Watson * handle the case of interfaces with different capabilities better. 5797527624eSRobert Watson * 5807527624eSRobert Watson * XXXRW: Sort of want an M_DISTRIBUTED flag to avoid multiple distributions 5817527624eSRobert Watson * at multiple layers? 5827527624eSRobert Watson * 5837527624eSRobert Watson * XXXRW: For now, enable all this only if RSS is compiled in, although it 5847527624eSRobert Watson * works fine without RSS. Need to characterise the performance overhead 5857527624eSRobert Watson * of the detour through the netisr code in the event the result is always 5867527624eSRobert Watson * direct dispatch. 5876cb52192SRobert Watson */ 5886cb52192SRobert Watson static void 5896cb52192SRobert Watson ether_nh_input(struct mbuf *m) 5906cb52192SRobert Watson { 5916cb52192SRobert Watson 5926cb52192SRobert Watson ether_input_internal(m->m_pkthdr.rcvif, m); 5936cb52192SRobert Watson } 5946cb52192SRobert Watson 5956cb52192SRobert Watson static struct netisr_handler ether_nh = { 5966cb52192SRobert Watson .nh_name = "ether", 5976cb52192SRobert Watson .nh_handler = ether_nh_input, 5986cb52192SRobert Watson .nh_proto = NETISR_ETHER, 5997527624eSRobert Watson #ifdef RSS 6007527624eSRobert Watson .nh_policy = NETISR_POLICY_CPU, 6017527624eSRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 6027527624eSRobert Watson .nh_m2cpuid = rss_m2cpuid, 6037527624eSRobert Watson #else 6046cb52192SRobert Watson .nh_policy = NETISR_POLICY_SOURCE, 6056cb52192SRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 6067527624eSRobert Watson #endif 6076cb52192SRobert Watson }; 6086cb52192SRobert Watson 6096cb52192SRobert Watson static void 6106cb52192SRobert Watson ether_init(__unused void *arg) 6116cb52192SRobert Watson { 6126cb52192SRobert Watson 6136cb52192SRobert Watson netisr_register(ðer_nh); 6146cb52192SRobert Watson } 6156cb52192SRobert Watson SYSINIT(ether, SI_SUB_INIT_IF, SI_ORDER_ANY, ether_init, NULL); 6166cb52192SRobert Watson 6176cb52192SRobert Watson static void 6187d4317bdSAlexander V. Chernikov vnet_ether_init(__unused void *arg) 6197d4317bdSAlexander V. Chernikov { 6207d4317bdSAlexander V. Chernikov int i; 6217d4317bdSAlexander V. Chernikov 6227d4317bdSAlexander V. Chernikov /* Initialize packet filter hooks. */ 6237d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_type = PFIL_TYPE_AF; 6247d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_af = AF_LINK; 6257d4317bdSAlexander V. Chernikov if ((i = pfil_head_register(&V_link_pfil_hook)) != 0) 6267d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to register pfil link hook, " 6277d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 6287d4317bdSAlexander V. Chernikov } 6297d4317bdSAlexander V. Chernikov VNET_SYSINIT(vnet_ether_init, SI_SUB_PROTO_IF, SI_ORDER_ANY, 6307d4317bdSAlexander V. Chernikov vnet_ether_init, NULL); 6317d4317bdSAlexander V. Chernikov 6327d4317bdSAlexander V. Chernikov static void 6337d4317bdSAlexander V. Chernikov vnet_ether_destroy(__unused void *arg) 6347d4317bdSAlexander V. Chernikov { 6357d4317bdSAlexander V. Chernikov int i; 6367d4317bdSAlexander V. Chernikov 6377d4317bdSAlexander V. Chernikov if ((i = pfil_head_unregister(&V_link_pfil_hook)) != 0) 6387d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to unregister pfil link hook, " 6397d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 6407d4317bdSAlexander V. Chernikov } 6417d4317bdSAlexander V. Chernikov VNET_SYSUNINIT(vnet_ether_uninit, SI_SUB_PROTO_IF, SI_ORDER_ANY, 6427d4317bdSAlexander V. Chernikov vnet_ether_destroy, NULL); 6437d4317bdSAlexander V. Chernikov 6447d4317bdSAlexander V. Chernikov 6457d4317bdSAlexander V. Chernikov 6467d4317bdSAlexander V. Chernikov static void 6476cb52192SRobert Watson ether_input(struct ifnet *ifp, struct mbuf *m) 6486cb52192SRobert Watson { 6496cb52192SRobert Watson 6504857f5fbSGeorge V. Neville-Neil struct mbuf *mn; 6514857f5fbSGeorge V. Neville-Neil 6524857f5fbSGeorge V. Neville-Neil /* 6534857f5fbSGeorge V. Neville-Neil * The drivers are allowed to pass in a chain of packets linked with 6544857f5fbSGeorge V. Neville-Neil * m_nextpkt. We split them up into separate packets here and pass 6554857f5fbSGeorge V. Neville-Neil * them up. This allows the drivers to amortize the receive lock. 6564857f5fbSGeorge V. Neville-Neil */ 6574857f5fbSGeorge V. Neville-Neil while (m) { 6584857f5fbSGeorge V. Neville-Neil mn = m->m_nextpkt; 6594857f5fbSGeorge V. Neville-Neil m->m_nextpkt = NULL; 6604857f5fbSGeorge V. Neville-Neil 6616cb52192SRobert Watson /* 6626cb52192SRobert Watson * We will rely on rcvif being set properly in the deferred context, 6636cb52192SRobert Watson * so assert it is correct here. 6646cb52192SRobert Watson */ 6656cb52192SRobert Watson KASSERT(m->m_pkthdr.rcvif == ifp, ("%s: ifnet mismatch", __func__)); 6666cb52192SRobert Watson netisr_dispatch(NETISR_ETHER, m); 6674857f5fbSGeorge V. Neville-Neil m = mn; 6684857f5fbSGeorge V. Neville-Neil } 6696cb52192SRobert Watson } 6706cb52192SRobert Watson 6716cb52192SRobert Watson /* 672e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 673e1e1452dSArchie Cobbs */ 674e1e1452dSArchie Cobbs void 675c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 676e1e1452dSArchie Cobbs { 677c1d93b05SSam Leffler struct ether_header *eh; 6787d4317bdSAlexander V. Chernikov int i, isr; 679e1e1452dSArchie Cobbs u_short ether_type; 68069462a82SBruce M Simpson 68169462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 68269462a82SBruce M Simpson 6837d4317bdSAlexander V. Chernikov /* Do not grab PROMISC frames in case we are re-entered. */ 6847d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook) && !(m->m_flags & M_PROMISC)) { 6857d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_IN, NULL); 6867d4317bdSAlexander V. Chernikov 6877d4317bdSAlexander V. Chernikov if (i != 0 || m == NULL) 6887d4317bdSAlexander V. Chernikov return; 68969462a82SBruce M Simpson } 6907d4317bdSAlexander V. Chernikov 691c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 692cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 693c1d93b05SSam Leffler 694a9771948SGleb Smirnoff /* 69569462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 69669462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 697a9771948SGleb Smirnoff */ 69869462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 69969462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 70075ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 7013751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_NOPROTO, 1); 7026c23e6ccSRuslan Ermilov m_freem(m); 7036c23e6ccSRuslan Ermilov return; 7046c23e6ccSRuslan Ermilov } 70569462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 70669462a82SBruce M Simpson __func__)); 70769462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 70869462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 709c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 710c1d93b05SSam Leffler return; 711c1d93b05SSam Leffler } 712c1d93b05SSam Leffler 713c1d93b05SSam Leffler /* 71469462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 71569462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 716c1d93b05SSam Leffler */ 71769462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 718c1d93b05SSam Leffler m_freem(m); 719c1d93b05SSam Leffler return; 720c1d93b05SSam Leffler } 721c1d93b05SSam Leffler 72269462a82SBruce M Simpson /* 72369462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 72469462a82SBruce M Simpson * Strip off Ethernet header. 72569462a82SBruce M Simpson */ 72669462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 72786bd0491SAndre Oppermann m_clrprotoflags(m); 728797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 729c1d93b05SSam Leffler 73069462a82SBruce M Simpson /* 73169462a82SBruce M Simpson * Dispatch frame to upper layer. 73269462a82SBruce M Simpson */ 733307d80beSDavid Greenman switch (ether_type) { 734df8bae1dSRodney W. Grimes #ifdef INET 735df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 7365d691e6dSAndre Oppermann if ((m = ip_fastforward(m)) == NULL) 7371f91d8c5SDavid Greenman return; 7381cafed39SJonathan Lemon isr = NETISR_IP; 739df8bae1dSRodney W. Grimes break; 740df8bae1dSRodney W. Grimes 741df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 74208aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 74308aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 74408aadfbbSJonathan Lemon m_freem(m); 74508aadfbbSJonathan Lemon return; 74608aadfbbSJonathan Lemon } 7471cafed39SJonathan Lemon isr = NETISR_ARP; 748df8bae1dSRodney W. Grimes break; 749df8bae1dSRodney W. Grimes #endif 75082cd038dSYoshinobu Inoue #ifdef INET6 75182cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 7521cafed39SJonathan Lemon isr = NETISR_IPV6; 75382cd038dSYoshinobu Inoue break; 75482cd038dSYoshinobu Inoue #endif 755df8bae1dSRodney W. Grimes default: 7561cafed39SJonathan Lemon goto discard; 757df8bae1dSRodney W. Grimes } 7581cafed39SJonathan Lemon netisr_dispatch(isr, m); 759c1d93b05SSam Leffler return; 7601cafed39SJonathan Lemon 761c1d93b05SSam Leffler discard: 762c1d93b05SSam Leffler /* 763c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 764c1d93b05SSam Leffler * hand the packet to it for last chance processing; 765c1d93b05SSam Leffler * otherwise dispose of it. 766c1d93b05SSam Leffler */ 767833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 768514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 769514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 770c1d93b05SSam Leffler /* 771c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 772c1d93b05SSam Leffler * consistent view of inbound packets. 773c1d93b05SSam Leffler */ 774eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_HDR_LEN, M_NOWAIT); 775c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 776c1d93b05SSam Leffler return; 777c1d93b05SSam Leffler } 778c1d93b05SSam Leffler m_freem(m); 779c1d93b05SSam Leffler } 780c1d93b05SSam Leffler 781c1d93b05SSam Leffler /* 782c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 783c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 784c1d93b05SSam Leffler * 785c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 786c1d93b05SSam Leffler * 787c1d93b05SSam Leffler * since there's no static buffer involved. 788c1d93b05SSam Leffler */ 789c1d93b05SSam Leffler char * 790c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 791c1d93b05SSam Leffler { 792c1d93b05SSam Leffler static char etherbuf[18]; 793c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 794c1d93b05SSam Leffler return (etherbuf); 795df8bae1dSRodney W. Grimes } 796df8bae1dSRodney W. Grimes 797df8bae1dSRodney W. Grimes /* 798df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 799df8bae1dSRodney W. Grimes */ 800df8bae1dSRodney W. Grimes void 801d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 802df8bae1dSRodney W. Grimes { 803f93dfa28SBrooks Davis int i; 804098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 805098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 806df8bae1dSRodney W. Grimes 807c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 808c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 809cfeff1b6SJonathan Lemon if_attach(ifp); 810df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 811c1d93b05SSam Leffler ifp->if_output = ether_output; 812c1d93b05SSam Leffler ifp->if_input = ether_input; 8131158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 814d3c351c5SMarko Zec #ifdef VIMAGE 815d3c351c5SMarko Zec ifp->if_reassign = ether_reassign; 816d3c351c5SMarko Zec #endif 817a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 818c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 819322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 820c1d93b05SSam Leffler 8214a0d6638SRuslan Ermilov ifa = ifp->if_addr; 8226e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 82359562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 824df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 825df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 826d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 827c1d93b05SSam Leffler 828797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 829e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 830e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 831e3bbbec2SMatthew N. Dodd 832f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 833f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 834d09ed26fSRuslan Ermilov if (lla[i] != 0) 835f93dfa28SBrooks Davis break; 836f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 837d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 838ef1f9169SMarcel Moolenaar 839ef1f9169SMarcel Moolenaar uuid_ether_add(LLADDR(sdl)); 840e1e1452dSArchie Cobbs } 841e1e1452dSArchie Cobbs 84221b8ebd9SArchie Cobbs /* 84321b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 84421b8ebd9SArchie Cobbs */ 84521b8ebd9SArchie Cobbs void 846c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 84721b8ebd9SArchie Cobbs { 848ef1f9169SMarcel Moolenaar struct sockaddr_dl *sdl; 849ef1f9169SMarcel Moolenaar 850ef1f9169SMarcel Moolenaar sdl = (struct sockaddr_dl *)(ifp->if_addr->ifa_addr); 851ef1f9169SMarcel Moolenaar uuid_ether_del(LLADDR(sdl)); 852ef1f9169SMarcel Moolenaar 853833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 854514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 855514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 85621b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 857514bcb89SPoul-Henning Kamp } 85820a65f37SAndrew Thompson 85921b8ebd9SArchie Cobbs bpfdetach(ifp); 86021b8ebd9SArchie Cobbs if_detach(ifp); 86121b8ebd9SArchie Cobbs } 86221b8ebd9SArchie Cobbs 863d3c351c5SMarko Zec #ifdef VIMAGE 864d3c351c5SMarko Zec void 865d3c351c5SMarko Zec ether_reassign(struct ifnet *ifp, struct vnet *new_vnet, char *unused __unused) 866d3c351c5SMarko Zec { 867d3c351c5SMarko Zec 868833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 869d3c351c5SMarko Zec KASSERT(ng_ether_detach_p != NULL, 870d3c351c5SMarko Zec ("ng_ether_detach_p is NULL")); 871d3c351c5SMarko Zec (*ng_ether_detach_p)(ifp); 872d3c351c5SMarko Zec } 873d3c351c5SMarko Zec 874d3c351c5SMarko Zec if (ng_ether_attach_p != NULL) { 875d3c351c5SMarko Zec CURVNET_SET_QUIET(new_vnet); 876d3c351c5SMarko Zec (*ng_ether_attach_p)(ifp); 877d3c351c5SMarko Zec CURVNET_RESTORE(); 878d3c351c5SMarko Zec } 879d3c351c5SMarko Zec } 880d3c351c5SMarko Zec #endif 881d3c351c5SMarko Zec 882ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 883602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 88430106f6aSPoul-Henning Kamp 88516b4a343SChristian Weisgerber #if 0 88616b4a343SChristian Weisgerber /* 88716b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 88816b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 88916b4a343SChristian Weisgerber * than the double-loop. 89016b4a343SChristian Weisgerber */ 89116b4a343SChristian Weisgerber uint32_t 89216b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 89316b4a343SChristian Weisgerber { 89416b4a343SChristian Weisgerber size_t i; 89516b4a343SChristian Weisgerber uint32_t crc; 89616b4a343SChristian Weisgerber int bit; 89716b4a343SChristian Weisgerber uint8_t data; 89816b4a343SChristian Weisgerber 89916b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 90016b4a343SChristian Weisgerber 90116b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 902933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 90316b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 90416b4a343SChristian Weisgerber crc >>= 1; 90516b4a343SChristian Weisgerber if (carry) 90616b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 90716b4a343SChristian Weisgerber } 908933dad75SAntoine Brodin } 90916b4a343SChristian Weisgerber 91016b4a343SChristian Weisgerber return (crc); 91116b4a343SChristian Weisgerber } 91216b4a343SChristian Weisgerber #else 91316b4a343SChristian Weisgerber uint32_t 91416b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 91516b4a343SChristian Weisgerber { 91616b4a343SChristian Weisgerber static const uint32_t crctab[] = { 91716b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 91816b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 91916b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 92016b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 92116b4a343SChristian Weisgerber }; 92216b4a343SChristian Weisgerber size_t i; 92316b4a343SChristian Weisgerber uint32_t crc; 92416b4a343SChristian Weisgerber 92516b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 92616b4a343SChristian Weisgerber 92716b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 92816b4a343SChristian Weisgerber crc ^= buf[i]; 92916b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 93016b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 93116b4a343SChristian Weisgerber } 93216b4a343SChristian Weisgerber 93316b4a343SChristian Weisgerber return (crc); 93416b4a343SChristian Weisgerber } 93516b4a343SChristian Weisgerber #endif 93616b4a343SChristian Weisgerber 93716b4a343SChristian Weisgerber uint32_t 93816b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 93916b4a343SChristian Weisgerber { 94016b4a343SChristian Weisgerber size_t i; 94116b4a343SChristian Weisgerber uint32_t crc, carry; 94216b4a343SChristian Weisgerber int bit; 94316b4a343SChristian Weisgerber uint8_t data; 94416b4a343SChristian Weisgerber 94516b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 94616b4a343SChristian Weisgerber 94716b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 94816b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 94916b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 95016b4a343SChristian Weisgerber crc <<= 1; 95116b4a343SChristian Weisgerber if (carry) 95216b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 95316b4a343SChristian Weisgerber } 95416b4a343SChristian Weisgerber } 95516b4a343SChristian Weisgerber 95616b4a343SChristian Weisgerber return (crc); 95716b4a343SChristian Weisgerber } 95816b4a343SChristian Weisgerber 959fb583156SDavid Greenman int 960995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 96130106f6aSPoul-Henning Kamp { 96230106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 96330106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 964fb583156SDavid Greenman int error = 0; 96530106f6aSPoul-Henning Kamp 96630106f6aSPoul-Henning Kamp switch (command) { 96730106f6aSPoul-Henning Kamp case SIOCSIFADDR: 96830106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 96930106f6aSPoul-Henning Kamp 97030106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 97130106f6aSPoul-Henning Kamp #ifdef INET 97230106f6aSPoul-Henning Kamp case AF_INET: 97330106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 974322dcb8dSMax Khon arp_ifinit(ifp, ifa); 97530106f6aSPoul-Henning Kamp break; 97630106f6aSPoul-Henning Kamp #endif 97730106f6aSPoul-Henning Kamp default: 97830106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 97930106f6aSPoul-Henning Kamp break; 98030106f6aSPoul-Henning Kamp } 98130106f6aSPoul-Henning Kamp break; 98230106f6aSPoul-Henning Kamp 98330106f6aSPoul-Henning Kamp case SIOCGIFADDR: 98430106f6aSPoul-Henning Kamp { 98530106f6aSPoul-Henning Kamp struct sockaddr *sa; 98630106f6aSPoul-Henning Kamp 98730106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 9884a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 98930106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 99030106f6aSPoul-Henning Kamp } 99130106f6aSPoul-Henning Kamp break; 992fb583156SDavid Greenman 993fb583156SDavid Greenman case SIOCSIFMTU: 994fb583156SDavid Greenman /* 995fb583156SDavid Greenman * Set the interface MTU. 996fb583156SDavid Greenman */ 997fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 998fb583156SDavid Greenman error = EINVAL; 999fb583156SDavid Greenman } else { 1000fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 100130106f6aSPoul-Henning Kamp } 1002fb583156SDavid Greenman break; 1003c1d93b05SSam Leffler default: 1004c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1005c1d93b05SSam Leffler break; 1006fb583156SDavid Greenman } 1007fb583156SDavid Greenman return (error); 100830106f6aSPoul-Henning Kamp } 10091158dfb7SGarrett Wollman 101037c84183SPoul-Henning Kamp static int 101172fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 101272fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 10131158dfb7SGarrett Wollman { 10141158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1015d7647d96SDag-Erling Smørgrav #ifdef INET 10161158dfb7SGarrett Wollman struct sockaddr_in *sin; 1017d7647d96SDag-Erling Smørgrav #endif 101882cd038dSYoshinobu Inoue #ifdef INET6 101982cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 102082cd038dSYoshinobu Inoue #endif 10211158dfb7SGarrett Wollman u_char *e_addr; 10221158dfb7SGarrett Wollman 10231158dfb7SGarrett Wollman switch(sa->sa_family) { 10241158dfb7SGarrett Wollman case AF_LINK: 10257f33a738SJulian Elischer /* 10267f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 10277f33a738SJulian Elischer */ 10281158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 10291158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1030086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 10311158dfb7SGarrett Wollman return EADDRNOTAVAIL; 10321158dfb7SGarrett Wollman *llsa = 0; 10331158dfb7SGarrett Wollman return 0; 10341158dfb7SGarrett Wollman 10351158dfb7SGarrett Wollman #ifdef INET 10361158dfb7SGarrett Wollman case AF_INET: 10371158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 10381158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 10391158dfb7SGarrett Wollman return EADDRNOTAVAIL; 104095fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 10411158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 10421158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 10431158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 10441158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 10451158dfb7SGarrett Wollman return 0; 10461158dfb7SGarrett Wollman #endif 104782cd038dSYoshinobu Inoue #ifdef INET6 104882cd038dSYoshinobu Inoue case AF_INET6: 104982cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1050595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1051595b8a1cSJun-ichiro itojun Hagino /* 1052595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1053595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1054595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1055595b8a1cSJun-ichiro itojun Hagino */ 1056595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1057595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1058595b8a1cSJun-ichiro itojun Hagino return 0; 1059595b8a1cSJun-ichiro itojun Hagino } 106082cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 106182cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 106295fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 106382cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 106482cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 106582cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 106682cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 106782cd038dSYoshinobu Inoue return 0; 106882cd038dSYoshinobu Inoue #endif 10691158dfb7SGarrett Wollman 10701158dfb7SGarrett Wollman default: 10711158dfb7SGarrett Wollman /* 10721158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 10731158dfb7SGarrett Wollman * that counts... 10741158dfb7SGarrett Wollman */ 10751158dfb7SGarrett Wollman return EAFNOSUPPORT; 10761158dfb7SGarrett Wollman } 10771158dfb7SGarrett Wollman } 107840811c14SMatthew N. Dodd 107940811c14SMatthew N. Dodd static moduledata_t ether_mod = { 1080833e8dc5SGleb Smirnoff .name = "ether", 108140811c14SMatthew N. Dodd }; 108240811c14SMatthew N. Dodd 108352f1277eSChristian S.J. Peron void 108452f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 108552f1277eSChristian S.J. Peron { 108652f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 108752f1277eSChristian S.J. Peron struct mbuf mv, mb; 108852f1277eSChristian S.J. Peron 108952f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 109052f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 109152f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 109252f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 109352f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 109452f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 109552f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 109652f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 109752f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 109852f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 109952f1277eSChristian S.J. Peron /* 110052f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 110152f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 110252f1277eSChristian S.J. Peron * 110352f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 110452f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 110552f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 110652f1277eSChristian S.J. Peron * 110752f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 110852f1277eSChristian S.J. Peron */ 110952f1277eSChristian S.J. Peron if (data != NULL) { 111052f1277eSChristian S.J. Peron mv.m_next = m; 111152f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 111252f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 111352f1277eSChristian S.J. Peron mb.m_next = &mv; 111452f1277eSChristian S.J. Peron mb.m_data = data; 111552f1277eSChristian S.J. Peron mb.m_len = dlen; 111652f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 111752f1277eSChristian S.J. Peron } else 111852f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 111952f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 112052f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 112152f1277eSChristian S.J. Peron } 112252f1277eSChristian S.J. Peron 112360e87ca8SAndrew Thompson struct mbuf * 1124a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 112560e87ca8SAndrew Thompson { 112660e87ca8SAndrew Thompson struct ether_vlan_header *evl; 112760e87ca8SAndrew Thompson 1128eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_NOWAIT); 112960e87ca8SAndrew Thompson if (m == NULL) 113060e87ca8SAndrew Thompson return (NULL); 113160e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 113260e87ca8SAndrew Thompson 113360e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 113460e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 113560e87ca8SAndrew Thompson if (m == NULL) 113660e87ca8SAndrew Thompson return (NULL); 113760e87ca8SAndrew Thompson } 113860e87ca8SAndrew Thompson 113960e87ca8SAndrew Thompson /* 114060e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 114160e87ca8SAndrew Thompson * with 802.1Q encapsulation. 114260e87ca8SAndrew Thompson */ 114360e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 114460e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 114560e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 114660e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 114760e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 114860e87ca8SAndrew Thompson return (m); 114960e87ca8SAndrew Thompson } 115060e87ca8SAndrew Thompson 1151fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 115240811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1153