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> 66b2bdc62aSAdrian Chadd #include <net/rss_config.h> 674b79449eSBjoern A. Zeeb #include <net/vnet.h> 68df8bae1dSRodney W. Grimes 6975bf2db3SGleb Smirnoff #include <netpfil/pf/pf_mtag.h> 7075bf2db3SGleb Smirnoff 7182cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 72df8bae1dSRodney W. Grimes #include <netinet/in.h> 73df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 74df8bae1dSRodney W. Grimes #include <netinet/if_ether.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 */ 15774860d4fSAlexander V. Chernikov int is_gw = 0; 15874860d4fSAlexander V. Chernikov uint32_t pflags = 0; 159df8bae1dSRodney W. Grimes 160279aa3d4SKip Macy if (ro != NULL) { 16174860d4fSAlexander V. Chernikov if (!(m->m_flags & (M_BCAST | M_MCAST))) { 162279aa3d4SKip Macy lle = ro->ro_lle; 16374860d4fSAlexander V. Chernikov if (lle != NULL) 16474860d4fSAlexander V. Chernikov pflags = lle->la_flags; 16574860d4fSAlexander V. Chernikov } 166279aa3d4SKip Macy rt0 = ro->ro_rt; 16774860d4fSAlexander V. Chernikov if (rt0 != NULL && (rt0->rt_flags & RTF_GATEWAY) != 0) 16874860d4fSAlexander V. Chernikov is_gw = 1; 169279aa3d4SKip Macy } 17043b29369SRobert Watson #ifdef MAC 17130d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 17243b29369SRobert Watson if (error) 17343b29369SRobert Watson senderr(error); 17443b29369SRobert Watson #endif 17543b29369SRobert Watson 1766eeac1d9SJulian Elischer M_PROFILE(m); 177afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 178afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 17913f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 18013f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 181df8bae1dSRodney W. Grimes senderr(ENETDOWN); 1827f760c48SMatthew N. Dodd 18384dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 184df8bae1dSRodney W. Grimes switch (dst->sa_family) { 185df8bae1dSRodney W. Grimes #ifdef INET 186df8bae1dSRodney W. Grimes case AF_INET: 18774860d4fSAlexander V. Chernikov if (lle != NULL && (pflags & LLE_VALID) != 0) 188279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 189279aa3d4SKip Macy else 19074860d4fSAlexander V. Chernikov error = arpresolve(ifp, is_gw, m, dst, edst, &pflags); 191cd46a114SLuigi Rizzo if (error) 192cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 19334bed8b0SDavid Greenman type = htons(ETHERTYPE_IP); 194df8bae1dSRodney W. Grimes break; 19543a6c75aSMatthew N. Dodd case AF_ARP: 19643a6c75aSMatthew N. Dodd { 19743a6c75aSMatthew N. Dodd struct arphdr *ah; 19843a6c75aSMatthew N. Dodd ah = mtod(m, struct arphdr *); 19943a6c75aSMatthew N. Dodd ah->ar_hrd = htons(ARPHRD_ETHER); 20043a6c75aSMatthew N. Dodd 201c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 20243a6c75aSMatthew N. Dodd 20343a6c75aSMatthew N. Dodd switch(ntohs(ah->ar_op)) { 20443a6c75aSMatthew N. Dodd case ARPOP_REVREQUEST: 20543a6c75aSMatthew N. Dodd case ARPOP_REVREPLY: 20643a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_REVARP); 20743a6c75aSMatthew N. Dodd break; 20843a6c75aSMatthew N. Dodd case ARPOP_REQUEST: 20943a6c75aSMatthew N. Dodd case ARPOP_REPLY: 21043a6c75aSMatthew N. Dodd default: 21143a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_ARP); 21243a6c75aSMatthew N. Dodd break; 21343a6c75aSMatthew N. Dodd } 21443a6c75aSMatthew N. Dodd 21543a6c75aSMatthew N. Dodd if (m->m_flags & M_BCAST) 21643a6c75aSMatthew N. Dodd bcopy(ifp->if_broadcastaddr, edst, ETHER_ADDR_LEN); 21743a6c75aSMatthew N. Dodd else 21843a6c75aSMatthew N. Dodd bcopy(ar_tha(ah), edst, ETHER_ADDR_LEN); 21943a6c75aSMatthew N. Dodd 22043a6c75aSMatthew N. Dodd } 22143a6c75aSMatthew N. Dodd break; 222df8bae1dSRodney W. Grimes #endif 22382cd038dSYoshinobu Inoue #ifdef INET6 22482cd038dSYoshinobu Inoue case AF_INET6: 22574860d4fSAlexander V. Chernikov if (lle != NULL && (pflags & LLE_VALID)) 226279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 227279aa3d4SKip Macy else 22874860d4fSAlexander V. Chernikov error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, 22974860d4fSAlexander V. Chernikov &pflags); 230cd46a114SLuigi Rizzo if (error) 231cd46a114SLuigi Rizzo return error; 23282cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 23382cd038dSYoshinobu Inoue break; 23482cd038dSYoshinobu Inoue #endif 235114ae644SMike Smith case pseudo_AF_HDRCMPLT: 23647e8d432SGleb Smirnoff { 2371a3a2b67SAlexander V. Chernikov const struct ether_header *eh; 2381a3a2b67SAlexander V. Chernikov 239114ae644SMike Smith hdrcmplt = 1; 240114ae644SMike Smith /* FALLTHROUGH */ 241114ae644SMike Smith 242df8bae1dSRodney W. Grimes case AF_UNSPEC: 243c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 2441a3a2b67SAlexander V. Chernikov eh = (const struct ether_header *)dst->sa_data; 24594a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 246df8bae1dSRodney W. Grimes type = eh->ether_type; 247df8bae1dSRodney W. Grimes break; 24847e8d432SGleb Smirnoff } 249df8bae1dSRodney W. Grimes default: 25029e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 251df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 252df8bae1dSRodney W. Grimes } 253df8bae1dSRodney W. Grimes 25474860d4fSAlexander V. Chernikov if ((pflags & LLE_IFADDR) != 0) { 25522f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, m); 2566e6b3f7cSQing Li return (if_simloop(ifp, m, dst->sa_family, 0)); 2576e6b3f7cSQing Li } 2586e6b3f7cSQing Li 259df8bae1dSRodney W. Grimes /* 260df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 261df8bae1dSRodney W. Grimes * allocate another. 262df8bae1dSRodney W. Grimes */ 263eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_HDR_LEN, M_NOWAIT); 2642166ffe8SRobert Watson if (m == NULL) 265df8bae1dSRodney W. Grimes senderr(ENOBUFS); 266df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 267c69aeaadSAlexander V. Chernikov if (hdrcmplt == 0) { 268c69aeaadSAlexander V. Chernikov memcpy(&eh->ether_type, &type, sizeof(eh->ether_type)); 269c69aeaadSAlexander V. Chernikov memcpy(eh->ether_dhost, edst, sizeof (edst)); 270c69aeaadSAlexander V. Chernikov memcpy(eh->ether_shost, IF_LLADDR(ifp),sizeof(eh->ether_shost)); 271c69aeaadSAlexander V. Chernikov } 272ed7509acSJulian Elischer 273ed7509acSJulian Elischer /* 274ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 275ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 276ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 277ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 278ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 279ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 280ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 281ed7509acSJulian Elischer */ 282c54c76ccSOleg Bulyzhin if ((ifp->if_flags & IFF_SIMPLEX) && loop_copy && 28360ee3847SMax Laier ((t = pf_find_mtag(m)) == NULL || !t->routed)) { 284c54c76ccSOleg Bulyzhin if (m->m_flags & M_BCAST) { 28506f684b0SMatthew N. Dodd struct mbuf *n; 286ed7509acSJulian Elischer 287294dd290SLuigi Rizzo /* 288294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 289294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 290294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 291294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 292294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 293294dd290SLuigi Rizzo * extra data copying vs. extra locking). 2949983b3c0SYaroslav Tykhiy * 2959983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 2969983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 2979983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 298294dd290SLuigi Rizzo */ 299eb1b1807SGleb Smirnoff if ((n = m_dup(m, M_NOWAIT)) != NULL) { 30022f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, n); 30106a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 302c1404dc0SArchie Cobbs } else 3033751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 30406f684b0SMatthew N. Dodd } else if (bcmp(eh->ether_dhost, eh->ether_shost, 30506f684b0SMatthew N. Dodd ETHER_ADDR_LEN) == 0) { 30622f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, m); 30706a429a3SArchie Cobbs (void) if_simloop(ifp, m, dst->sa_family, hlen); 308ed7509acSJulian Elischer return (0); /* XXX */ 309ed7509acSJulian Elischer } 310ed7509acSJulian Elischer } 3112e2de7f2SArchie Cobbs 3123f7d1396SAndrew Thompson /* 3133f7d1396SAndrew Thompson * Bridges require special output handling. 3143f7d1396SAndrew Thompson */ 3153f7d1396SAndrew Thompson if (ifp->if_bridge) { 3163f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 3173f7d1396SAndrew Thompson return (error); 3183f7d1396SAndrew Thompson } 3193f7d1396SAndrew Thompson 320259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 321a9771948SGleb Smirnoff if (ifp->if_carp && 32208b68b0eSGleb Smirnoff (error = (*carp_output_p)(ifp, m, dst))) 323a9771948SGleb Smirnoff goto bad; 324a9771948SGleb Smirnoff #endif 325a9771948SGleb Smirnoff 326e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 327833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 328514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 329514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 330e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 331e1e1452dSArchie Cobbs bad: if (m != NULL) 332e1e1452dSArchie Cobbs m_freem(m); 333e1e1452dSArchie Cobbs return (error); 334e1e1452dSArchie Cobbs } 335e1e1452dSArchie Cobbs if (m == NULL) 336e1e1452dSArchie Cobbs return (0); 337e1e1452dSArchie Cobbs } 338e1e1452dSArchie Cobbs 339e1e1452dSArchie Cobbs /* Continue with link-layer output */ 340e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 341e1e1452dSArchie Cobbs } 342e1e1452dSArchie Cobbs 343e1e1452dSArchie Cobbs /* 344e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 345e1e1452dSArchie Cobbs * 346e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 347e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 348e1e1452dSArchie Cobbs */ 349e1e1452dSArchie Cobbs int 350c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 351e1e1452dSArchie Cobbs { 3527d4317bdSAlexander V. Chernikov int i; 3532b25acc1SLuigi Rizzo 3547d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook)) { 3557d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_OUT, NULL); 3567d4317bdSAlexander V. Chernikov 3577d4317bdSAlexander V. Chernikov if (i != 0) 3587d4317bdSAlexander V. Chernikov return (EACCES); 3597d4317bdSAlexander V. Chernikov 3607d4317bdSAlexander V. Chernikov if (m == NULL) 3617d4317bdSAlexander V. Chernikov return (0); 3624b984093SLuigi Rizzo } 3632b25acc1SLuigi Rizzo 364df8bae1dSRodney W. Grimes /* 365df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 366df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 367df8bae1dSRodney W. Grimes */ 368aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 369df8bae1dSRodney W. Grimes } 370df8bae1dSRodney W. Grimes 371d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 372d7647d96SDag-Erling Smørgrav #endif 3734b984093SLuigi Rizzo 3744b984093SLuigi Rizzo /* 375c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 376c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 377df8bae1dSRodney W. Grimes */ 378c1d93b05SSam Leffler static void 3796cb52192SRobert Watson ether_input_internal(struct ifnet *ifp, struct mbuf *m) 380df8bae1dSRodney W. Grimes { 381c1d93b05SSam Leffler struct ether_header *eh; 382c1d93b05SSam Leffler u_short etype; 383df8bae1dSRodney W. Grimes 38469462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 38569462a82SBruce M Simpson m_freem(m); 38669462a82SBruce M Simpson return; 38769462a82SBruce M Simpson } 38869462a82SBruce M Simpson #ifdef DIAGNOSTIC 38969462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 39069462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 39169462a82SBruce M Simpson m_freem(m); 39269462a82SBruce M Simpson return; 39369462a82SBruce M Simpson } 39469462a82SBruce M Simpson #endif 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); 406d1b06863SMark Murray random_harvest_queue(m, sizeof(*m), 2, RANDOM_NET_ETHER); 407d1b06863SMark Murray 40821ca7b57SMarko Zec CURVNET_SET_QUIET(ifp->if_vnet); 40921ca7b57SMarko Zec 41069462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 41169462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 41269462a82SBruce M Simpson m->m_flags |= M_BCAST; 41369462a82SBruce M Simpson else 41469462a82SBruce M Simpson m->m_flags |= M_MCAST; 4153751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1); 41669462a82SBruce M Simpson } 41769462a82SBruce M Simpson 418533d8562SRobert Watson #ifdef MAC 419533d8562SRobert Watson /* 420533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 421533d8562SRobert Watson * consumers can get to it. 422533d8562SRobert Watson */ 42330d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 424533d8562SRobert Watson #endif 425533d8562SRobert Watson 426c1d93b05SSam Leffler /* 42769462a82SBruce M Simpson * Give bpf a chance at the packet. 428c1d93b05SSam Leffler */ 429d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 4302e2de7f2SArchie Cobbs 43169462a82SBruce M Simpson /* 43269462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 43369462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 43469462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 43569462a82SBruce M Simpson */ 436c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 437c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 438c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 439c1d93b05SSam Leffler } 440c1d93b05SSam Leffler 4414cdc1f54SGleb Smirnoff if (!(ifp->if_capenable & IFCAP_HWSTATS)) 4423751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 44305463bb5SDavid Greenman 44469462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 445de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 446de572b37SChristian S.J. Peron m_freem(m); 44721ca7b57SMarko Zec CURVNET_RESTORE(); 448de572b37SChristian S.J. Peron return; 449de572b37SChristian S.J. Peron } 450de572b37SChristian S.J. Peron 45118242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 452b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 45318242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 45418242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 45518242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 456b47888ceSAndrew Thompson if (m != NULL) 457b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 4582db13e75SMarko Zec else { 4592db13e75SMarko Zec CURVNET_RESTORE(); 460b47888ceSAndrew Thompson return; 461b47888ceSAndrew Thompson } 4622db13e75SMarko Zec } 463b47888ceSAndrew Thompson 46469462a82SBruce M Simpson /* 46569462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 46669462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 46769462a82SBruce M Simpson * path correctly. 46869462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 46969462a82SBruce M Simpson */ 47069462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 47169462a82SBruce M Simpson struct ether_vlan_header *evl; 47269462a82SBruce M Simpson 47369462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 47469462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 475402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 47669462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 477402d5e27SBruce M Simpson #endif 4783751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 4792db13e75SMarko Zec CURVNET_RESTORE(); 48069462a82SBruce M Simpson return; 48169462a82SBruce M Simpson } 48269462a82SBruce M Simpson 48369462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 48469462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 48569462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 48669462a82SBruce M Simpson 48769462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 48869462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 48969462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 49097cce87fSGleb Smirnoff eh = mtod(m, struct ether_header *); 49169462a82SBruce M Simpson } 49269462a82SBruce M Simpson 493a34c6aebSBjoern A. Zeeb M_SETFIB(m, ifp->if_fib); 494a34c6aebSBjoern A. Zeeb 49569462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 496833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 497514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 49869462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 49969462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 500c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 50121ca7b57SMarko Zec if (m == NULL) { 50221ca7b57SMarko Zec CURVNET_RESTORE(); 503e1e1452dSArchie Cobbs return; 504e1e1452dSArchie Cobbs } 5055e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 50621ca7b57SMarko Zec } 507e1e1452dSArchie Cobbs 5088f867517SAndrew Thompson /* 50969462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 51069462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 51169462a82SBruce M Simpson * and the frame should be delivered locally. 5128f867517SAndrew Thompson */ 51369462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 51469462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 515fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 51621ca7b57SMarko Zec if (m == NULL) { 51721ca7b57SMarko Zec CURVNET_RESTORE(); 5188f867517SAndrew Thompson return; 5198f867517SAndrew Thompson } 5205e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 52121ca7b57SMarko Zec } 5228f867517SAndrew Thompson 523259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 52469462a82SBruce M Simpson /* 52569462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 52669462a82SBruce M Simpson * mbuf flows up to Layer 3. 52769462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 52869462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 52969462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 53069462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 53169462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 53269462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 53369462a82SBruce M Simpson */ 53454bfbd51SWill Andrews if (ifp->if_carp && (*carp_forus_p)(ifp, eh->ether_dhost)) { 53569462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 53669462a82SBruce M Simpson } else 53769462a82SBruce M Simpson #endif 53869462a82SBruce M Simpson { 53969462a82SBruce M Simpson /* 540e7f8c833SBruce M Simpson * If the frame received was not for our MAC address, set the 54169462a82SBruce M Simpson * M_PROMISC flag on the mbuf chain. The frame may need to 54269462a82SBruce M Simpson * be seen by the rest of the Ethernet input path in case of 54369462a82SBruce M Simpson * re-entry (e.g. bridge, vlan, netgraph) but should not be 54469462a82SBruce M Simpson * seen by upper protocol layers. 54569462a82SBruce M Simpson */ 54669462a82SBruce M Simpson if (!ETHER_IS_MULTICAST(eh->ether_dhost) && 547e7f8c833SBruce M Simpson bcmp(IF_LLADDR(ifp), eh->ether_dhost, ETHER_ADDR_LEN) != 0) 54869462a82SBruce M Simpson m->m_flags |= M_PROMISC; 54969462a82SBruce M Simpson } 55069462a82SBruce M Simpson 551acf032f5SRobert Watson ether_demux(ifp, m); 55221ca7b57SMarko Zec CURVNET_RESTORE(); 553e1e1452dSArchie Cobbs } 554e1e1452dSArchie Cobbs 555e1e1452dSArchie Cobbs /* 5566cb52192SRobert Watson * Ethernet input dispatch; by default, direct dispatch here regardless of 5577527624eSRobert Watson * global configuration. However, if RSS is enabled, hook up RSS affinity 5587527624eSRobert Watson * so that when deferred or hybrid dispatch is enabled, we can redistribute 5597527624eSRobert Watson * load based on RSS. 5607527624eSRobert Watson * 5617527624eSRobert Watson * XXXRW: Would be nice if the ifnet passed up a flag indicating whether or 5627527624eSRobert Watson * not it had already done work distribution via multi-queue. Then we could 5637527624eSRobert Watson * direct dispatch in the event load balancing was already complete and 5647527624eSRobert Watson * handle the case of interfaces with different capabilities better. 5657527624eSRobert Watson * 5667527624eSRobert Watson * XXXRW: Sort of want an M_DISTRIBUTED flag to avoid multiple distributions 5677527624eSRobert Watson * at multiple layers? 5687527624eSRobert Watson * 5697527624eSRobert Watson * XXXRW: For now, enable all this only if RSS is compiled in, although it 5707527624eSRobert Watson * works fine without RSS. Need to characterise the performance overhead 5717527624eSRobert Watson * of the detour through the netisr code in the event the result is always 5727527624eSRobert Watson * direct dispatch. 5736cb52192SRobert Watson */ 5746cb52192SRobert Watson static void 5756cb52192SRobert Watson ether_nh_input(struct mbuf *m) 5766cb52192SRobert Watson { 5776cb52192SRobert Watson 578b71bed24SAndrey V. Elsukov M_ASSERTPKTHDR(m); 579b71bed24SAndrey V. Elsukov KASSERT(m->m_pkthdr.rcvif != NULL, 580b71bed24SAndrey V. Elsukov ("%s: NULL interface pointer", __func__)); 5816cb52192SRobert Watson ether_input_internal(m->m_pkthdr.rcvif, m); 5826cb52192SRobert Watson } 5836cb52192SRobert Watson 5846cb52192SRobert Watson static struct netisr_handler ether_nh = { 5856cb52192SRobert Watson .nh_name = "ether", 5866cb52192SRobert Watson .nh_handler = ether_nh_input, 5876cb52192SRobert Watson .nh_proto = NETISR_ETHER, 5887527624eSRobert Watson #ifdef RSS 5897527624eSRobert Watson .nh_policy = NETISR_POLICY_CPU, 5907527624eSRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 5917527624eSRobert Watson .nh_m2cpuid = rss_m2cpuid, 5927527624eSRobert Watson #else 5936cb52192SRobert Watson .nh_policy = NETISR_POLICY_SOURCE, 5946cb52192SRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 5957527624eSRobert Watson #endif 5966cb52192SRobert Watson }; 5976cb52192SRobert Watson 5986cb52192SRobert Watson static void 5996cb52192SRobert Watson ether_init(__unused void *arg) 6006cb52192SRobert Watson { 6016cb52192SRobert Watson 6026cb52192SRobert Watson netisr_register(ðer_nh); 6036cb52192SRobert Watson } 6046cb52192SRobert Watson SYSINIT(ether, SI_SUB_INIT_IF, SI_ORDER_ANY, ether_init, NULL); 6056cb52192SRobert Watson 6066cb52192SRobert Watson static void 6077d4317bdSAlexander V. Chernikov vnet_ether_init(__unused void *arg) 6087d4317bdSAlexander V. Chernikov { 6097d4317bdSAlexander V. Chernikov int i; 6107d4317bdSAlexander V. Chernikov 6117d4317bdSAlexander V. Chernikov /* Initialize packet filter hooks. */ 6127d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_type = PFIL_TYPE_AF; 6137d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_af = AF_LINK; 6147d4317bdSAlexander V. Chernikov if ((i = pfil_head_register(&V_link_pfil_hook)) != 0) 6157d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to register pfil link hook, " 6167d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 6177d4317bdSAlexander V. Chernikov } 6187d4317bdSAlexander V. Chernikov VNET_SYSINIT(vnet_ether_init, SI_SUB_PROTO_IF, SI_ORDER_ANY, 6197d4317bdSAlexander V. Chernikov vnet_ether_init, NULL); 6207d4317bdSAlexander V. Chernikov 6217d4317bdSAlexander V. Chernikov static void 6227d4317bdSAlexander V. Chernikov vnet_ether_destroy(__unused void *arg) 6237d4317bdSAlexander V. Chernikov { 6247d4317bdSAlexander V. Chernikov int i; 6257d4317bdSAlexander V. Chernikov 6267d4317bdSAlexander V. Chernikov if ((i = pfil_head_unregister(&V_link_pfil_hook)) != 0) 6277d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to unregister pfil link hook, " 6287d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 6297d4317bdSAlexander V. Chernikov } 6307d4317bdSAlexander V. Chernikov VNET_SYSUNINIT(vnet_ether_uninit, SI_SUB_PROTO_IF, SI_ORDER_ANY, 6317d4317bdSAlexander V. Chernikov vnet_ether_destroy, NULL); 6327d4317bdSAlexander V. Chernikov 6337d4317bdSAlexander V. Chernikov 6347d4317bdSAlexander V. Chernikov 6357d4317bdSAlexander V. Chernikov static void 6366cb52192SRobert Watson ether_input(struct ifnet *ifp, struct mbuf *m) 6376cb52192SRobert Watson { 6386cb52192SRobert Watson 6394857f5fbSGeorge V. Neville-Neil struct mbuf *mn; 6404857f5fbSGeorge V. Neville-Neil 6414857f5fbSGeorge V. Neville-Neil /* 6424857f5fbSGeorge V. Neville-Neil * The drivers are allowed to pass in a chain of packets linked with 6434857f5fbSGeorge V. Neville-Neil * m_nextpkt. We split them up into separate packets here and pass 6444857f5fbSGeorge V. Neville-Neil * them up. This allows the drivers to amortize the receive lock. 6454857f5fbSGeorge V. Neville-Neil */ 6464857f5fbSGeorge V. Neville-Neil while (m) { 6474857f5fbSGeorge V. Neville-Neil mn = m->m_nextpkt; 6484857f5fbSGeorge V. Neville-Neil m->m_nextpkt = NULL; 6494857f5fbSGeorge V. Neville-Neil 6506cb52192SRobert Watson /* 6516cb52192SRobert Watson * We will rely on rcvif being set properly in the deferred context, 6526cb52192SRobert Watson * so assert it is correct here. 6536cb52192SRobert Watson */ 6546cb52192SRobert Watson KASSERT(m->m_pkthdr.rcvif == ifp, ("%s: ifnet mismatch", __func__)); 6556cb52192SRobert Watson netisr_dispatch(NETISR_ETHER, m); 6564857f5fbSGeorge V. Neville-Neil m = mn; 6574857f5fbSGeorge V. Neville-Neil } 6586cb52192SRobert Watson } 6596cb52192SRobert Watson 6606cb52192SRobert Watson /* 661e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 662e1e1452dSArchie Cobbs */ 663e1e1452dSArchie Cobbs void 664c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 665e1e1452dSArchie Cobbs { 666c1d93b05SSam Leffler struct ether_header *eh; 6677d4317bdSAlexander V. Chernikov int i, isr; 668e1e1452dSArchie Cobbs u_short ether_type; 66969462a82SBruce M Simpson 67069462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 67169462a82SBruce M Simpson 6727d4317bdSAlexander V. Chernikov /* Do not grab PROMISC frames in case we are re-entered. */ 6737d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook) && !(m->m_flags & M_PROMISC)) { 6747d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_IN, NULL); 6757d4317bdSAlexander V. Chernikov 6767d4317bdSAlexander V. Chernikov if (i != 0 || m == NULL) 6777d4317bdSAlexander V. Chernikov return; 67869462a82SBruce M Simpson } 6797d4317bdSAlexander V. Chernikov 680c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 681cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 682c1d93b05SSam Leffler 683a9771948SGleb Smirnoff /* 68469462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 68569462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 686a9771948SGleb Smirnoff */ 68769462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 68869462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 68975ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 6903751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_NOPROTO, 1); 6916c23e6ccSRuslan Ermilov m_freem(m); 6926c23e6ccSRuslan Ermilov return; 6936c23e6ccSRuslan Ermilov } 69469462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 69569462a82SBruce M Simpson __func__)); 69669462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 69769462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 698c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 699c1d93b05SSam Leffler return; 700c1d93b05SSam Leffler } 701c1d93b05SSam Leffler 702c1d93b05SSam Leffler /* 70369462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 70469462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 705c1d93b05SSam Leffler */ 70669462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 707c1d93b05SSam Leffler m_freem(m); 708c1d93b05SSam Leffler return; 709c1d93b05SSam Leffler } 710c1d93b05SSam Leffler 71169462a82SBruce M Simpson /* 71269462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 71369462a82SBruce M Simpson * Strip off Ethernet header. 71469462a82SBruce M Simpson */ 71569462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 71686bd0491SAndre Oppermann m_clrprotoflags(m); 717797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 718c1d93b05SSam Leffler 71969462a82SBruce M Simpson /* 72069462a82SBruce M Simpson * Dispatch frame to upper layer. 72169462a82SBruce M Simpson */ 722307d80beSDavid Greenman switch (ether_type) { 723df8bae1dSRodney W. Grimes #ifdef INET 724df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 7255d691e6dSAndre Oppermann if ((m = ip_fastforward(m)) == NULL) 7261f91d8c5SDavid Greenman return; 7271cafed39SJonathan Lemon isr = NETISR_IP; 728df8bae1dSRodney W. Grimes break; 729df8bae1dSRodney W. Grimes 730df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 73108aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 73208aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 73308aadfbbSJonathan Lemon m_freem(m); 73408aadfbbSJonathan Lemon return; 73508aadfbbSJonathan Lemon } 7361cafed39SJonathan Lemon isr = NETISR_ARP; 737df8bae1dSRodney W. Grimes break; 738df8bae1dSRodney W. Grimes #endif 73982cd038dSYoshinobu Inoue #ifdef INET6 74082cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 7411cafed39SJonathan Lemon isr = NETISR_IPV6; 74282cd038dSYoshinobu Inoue break; 74382cd038dSYoshinobu Inoue #endif 744df8bae1dSRodney W. Grimes default: 7451cafed39SJonathan Lemon goto discard; 746df8bae1dSRodney W. Grimes } 7471cafed39SJonathan Lemon netisr_dispatch(isr, m); 748c1d93b05SSam Leffler return; 7491cafed39SJonathan Lemon 750c1d93b05SSam Leffler discard: 751c1d93b05SSam Leffler /* 752c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 753c1d93b05SSam Leffler * hand the packet to it for last chance processing; 754c1d93b05SSam Leffler * otherwise dispose of it. 755c1d93b05SSam Leffler */ 756833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 757514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 758514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 759c1d93b05SSam Leffler /* 760c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 761c1d93b05SSam Leffler * consistent view of inbound packets. 762c1d93b05SSam Leffler */ 763eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_HDR_LEN, M_NOWAIT); 764c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 765c1d93b05SSam Leffler return; 766c1d93b05SSam Leffler } 767c1d93b05SSam Leffler m_freem(m); 768c1d93b05SSam Leffler } 769c1d93b05SSam Leffler 770c1d93b05SSam Leffler /* 771c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 772c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 773c1d93b05SSam Leffler * 774c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 775c1d93b05SSam Leffler * 776c1d93b05SSam Leffler * since there's no static buffer involved. 777c1d93b05SSam Leffler */ 778c1d93b05SSam Leffler char * 779c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 780c1d93b05SSam Leffler { 781c1d93b05SSam Leffler static char etherbuf[18]; 782c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 783c1d93b05SSam Leffler return (etherbuf); 784df8bae1dSRodney W. Grimes } 785df8bae1dSRodney W. Grimes 786df8bae1dSRodney W. Grimes /* 787df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 788df8bae1dSRodney W. Grimes */ 789df8bae1dSRodney W. Grimes void 790d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 791df8bae1dSRodney W. Grimes { 792f93dfa28SBrooks Davis int i; 793098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 794098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 795df8bae1dSRodney W. Grimes 796c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 797c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 798cfeff1b6SJonathan Lemon if_attach(ifp); 799df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 800c1d93b05SSam Leffler ifp->if_output = ether_output; 801c1d93b05SSam Leffler ifp->if_input = ether_input; 8021158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 803d3c351c5SMarko Zec #ifdef VIMAGE 804d3c351c5SMarko Zec ifp->if_reassign = ether_reassign; 805d3c351c5SMarko Zec #endif 806a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 807c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 808322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 809c1d93b05SSam Leffler 8104a0d6638SRuslan Ermilov ifa = ifp->if_addr; 8116e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 81259562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 813df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 814df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 815d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 816c1d93b05SSam Leffler 817797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 818e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 819e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 820e3bbbec2SMatthew N. Dodd 821f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 822f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 823d09ed26fSRuslan Ermilov if (lla[i] != 0) 824f93dfa28SBrooks Davis break; 825f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 826d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 827ef1f9169SMarcel Moolenaar 828ef1f9169SMarcel Moolenaar uuid_ether_add(LLADDR(sdl)); 829e1e1452dSArchie Cobbs } 830e1e1452dSArchie Cobbs 83121b8ebd9SArchie Cobbs /* 83221b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 83321b8ebd9SArchie Cobbs */ 83421b8ebd9SArchie Cobbs void 835c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 83621b8ebd9SArchie Cobbs { 837ef1f9169SMarcel Moolenaar struct sockaddr_dl *sdl; 838ef1f9169SMarcel Moolenaar 839ef1f9169SMarcel Moolenaar sdl = (struct sockaddr_dl *)(ifp->if_addr->ifa_addr); 840ef1f9169SMarcel Moolenaar uuid_ether_del(LLADDR(sdl)); 841ef1f9169SMarcel Moolenaar 842833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 843514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 844514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 84521b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 846514bcb89SPoul-Henning Kamp } 84720a65f37SAndrew Thompson 84821b8ebd9SArchie Cobbs bpfdetach(ifp); 84921b8ebd9SArchie Cobbs if_detach(ifp); 85021b8ebd9SArchie Cobbs } 85121b8ebd9SArchie Cobbs 852d3c351c5SMarko Zec #ifdef VIMAGE 853d3c351c5SMarko Zec void 854d3c351c5SMarko Zec ether_reassign(struct ifnet *ifp, struct vnet *new_vnet, char *unused __unused) 855d3c351c5SMarko Zec { 856d3c351c5SMarko Zec 857833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 858d3c351c5SMarko Zec KASSERT(ng_ether_detach_p != NULL, 859d3c351c5SMarko Zec ("ng_ether_detach_p is NULL")); 860d3c351c5SMarko Zec (*ng_ether_detach_p)(ifp); 861d3c351c5SMarko Zec } 862d3c351c5SMarko Zec 863d3c351c5SMarko Zec if (ng_ether_attach_p != NULL) { 864d3c351c5SMarko Zec CURVNET_SET_QUIET(new_vnet); 865d3c351c5SMarko Zec (*ng_ether_attach_p)(ifp); 866d3c351c5SMarko Zec CURVNET_RESTORE(); 867d3c351c5SMarko Zec } 868d3c351c5SMarko Zec } 869d3c351c5SMarko Zec #endif 870d3c351c5SMarko Zec 871ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 872602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 87330106f6aSPoul-Henning Kamp 87416b4a343SChristian Weisgerber #if 0 87516b4a343SChristian Weisgerber /* 87616b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 87716b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 87816b4a343SChristian Weisgerber * than the double-loop. 87916b4a343SChristian Weisgerber */ 88016b4a343SChristian Weisgerber uint32_t 88116b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 88216b4a343SChristian Weisgerber { 88316b4a343SChristian Weisgerber size_t i; 88416b4a343SChristian Weisgerber uint32_t crc; 88516b4a343SChristian Weisgerber int bit; 88616b4a343SChristian Weisgerber uint8_t data; 88716b4a343SChristian Weisgerber 88816b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 88916b4a343SChristian Weisgerber 89016b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 891933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 89216b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 89316b4a343SChristian Weisgerber crc >>= 1; 89416b4a343SChristian Weisgerber if (carry) 89516b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 89616b4a343SChristian Weisgerber } 897933dad75SAntoine Brodin } 89816b4a343SChristian Weisgerber 89916b4a343SChristian Weisgerber return (crc); 90016b4a343SChristian Weisgerber } 90116b4a343SChristian Weisgerber #else 90216b4a343SChristian Weisgerber uint32_t 90316b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 90416b4a343SChristian Weisgerber { 90516b4a343SChristian Weisgerber static const uint32_t crctab[] = { 90616b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 90716b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 90816b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 90916b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 91016b4a343SChristian Weisgerber }; 91116b4a343SChristian Weisgerber size_t i; 91216b4a343SChristian Weisgerber uint32_t crc; 91316b4a343SChristian Weisgerber 91416b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 91516b4a343SChristian Weisgerber 91616b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 91716b4a343SChristian Weisgerber crc ^= buf[i]; 91816b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 91916b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 92016b4a343SChristian Weisgerber } 92116b4a343SChristian Weisgerber 92216b4a343SChristian Weisgerber return (crc); 92316b4a343SChristian Weisgerber } 92416b4a343SChristian Weisgerber #endif 92516b4a343SChristian Weisgerber 92616b4a343SChristian Weisgerber uint32_t 92716b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 92816b4a343SChristian Weisgerber { 92916b4a343SChristian Weisgerber size_t i; 93016b4a343SChristian Weisgerber uint32_t crc, carry; 93116b4a343SChristian Weisgerber int bit; 93216b4a343SChristian Weisgerber uint8_t data; 93316b4a343SChristian Weisgerber 93416b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 93516b4a343SChristian Weisgerber 93616b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 93716b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 93816b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 93916b4a343SChristian Weisgerber crc <<= 1; 94016b4a343SChristian Weisgerber if (carry) 94116b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 94216b4a343SChristian Weisgerber } 94316b4a343SChristian Weisgerber } 94416b4a343SChristian Weisgerber 94516b4a343SChristian Weisgerber return (crc); 94616b4a343SChristian Weisgerber } 94716b4a343SChristian Weisgerber 948fb583156SDavid Greenman int 949995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 95030106f6aSPoul-Henning Kamp { 95130106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 95230106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 953fb583156SDavid Greenman int error = 0; 95430106f6aSPoul-Henning Kamp 95530106f6aSPoul-Henning Kamp switch (command) { 95630106f6aSPoul-Henning Kamp case SIOCSIFADDR: 95730106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 95830106f6aSPoul-Henning Kamp 95930106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 96030106f6aSPoul-Henning Kamp #ifdef INET 96130106f6aSPoul-Henning Kamp case AF_INET: 96230106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 963322dcb8dSMax Khon arp_ifinit(ifp, ifa); 96430106f6aSPoul-Henning Kamp break; 96530106f6aSPoul-Henning Kamp #endif 96630106f6aSPoul-Henning Kamp default: 96730106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 96830106f6aSPoul-Henning Kamp break; 96930106f6aSPoul-Henning Kamp } 97030106f6aSPoul-Henning Kamp break; 97130106f6aSPoul-Henning Kamp 97230106f6aSPoul-Henning Kamp case SIOCGIFADDR: 97330106f6aSPoul-Henning Kamp { 97430106f6aSPoul-Henning Kamp struct sockaddr *sa; 97530106f6aSPoul-Henning Kamp 97630106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 9774a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 97830106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 97930106f6aSPoul-Henning Kamp } 98030106f6aSPoul-Henning Kamp break; 981fb583156SDavid Greenman 982fb583156SDavid Greenman case SIOCSIFMTU: 983fb583156SDavid Greenman /* 984fb583156SDavid Greenman * Set the interface MTU. 985fb583156SDavid Greenman */ 986fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 987fb583156SDavid Greenman error = EINVAL; 988fb583156SDavid Greenman } else { 989fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 99030106f6aSPoul-Henning Kamp } 991fb583156SDavid Greenman break; 992c1d93b05SSam Leffler default: 993c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 994c1d93b05SSam Leffler break; 995fb583156SDavid Greenman } 996fb583156SDavid Greenman return (error); 99730106f6aSPoul-Henning Kamp } 9981158dfb7SGarrett Wollman 99937c84183SPoul-Henning Kamp static int 100072fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 100172fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 10021158dfb7SGarrett Wollman { 10031158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1004d7647d96SDag-Erling Smørgrav #ifdef INET 10051158dfb7SGarrett Wollman struct sockaddr_in *sin; 1006d7647d96SDag-Erling Smørgrav #endif 100782cd038dSYoshinobu Inoue #ifdef INET6 100882cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 100982cd038dSYoshinobu Inoue #endif 10101158dfb7SGarrett Wollman u_char *e_addr; 10111158dfb7SGarrett Wollman 10121158dfb7SGarrett Wollman switch(sa->sa_family) { 10131158dfb7SGarrett Wollman case AF_LINK: 10147f33a738SJulian Elischer /* 10157f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 10167f33a738SJulian Elischer */ 10171158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 10181158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1019086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 10201158dfb7SGarrett Wollman return EADDRNOTAVAIL; 10211158dfb7SGarrett Wollman *llsa = 0; 10221158dfb7SGarrett Wollman return 0; 10231158dfb7SGarrett Wollman 10241158dfb7SGarrett Wollman #ifdef INET 10251158dfb7SGarrett Wollman case AF_INET: 10261158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 10271158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 10281158dfb7SGarrett Wollman return EADDRNOTAVAIL; 102995fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 10301158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 10311158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 10321158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 10331158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 10341158dfb7SGarrett Wollman return 0; 10351158dfb7SGarrett Wollman #endif 103682cd038dSYoshinobu Inoue #ifdef INET6 103782cd038dSYoshinobu Inoue case AF_INET6: 103882cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1039595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1040595b8a1cSJun-ichiro itojun Hagino /* 1041595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1042595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1043595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1044595b8a1cSJun-ichiro itojun Hagino */ 1045595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1046595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1047595b8a1cSJun-ichiro itojun Hagino return 0; 1048595b8a1cSJun-ichiro itojun Hagino } 104982cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 105082cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 105195fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 105282cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 105382cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 105482cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 105582cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 105682cd038dSYoshinobu Inoue return 0; 105782cd038dSYoshinobu Inoue #endif 10581158dfb7SGarrett Wollman 10591158dfb7SGarrett Wollman default: 10601158dfb7SGarrett Wollman /* 10611158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 10621158dfb7SGarrett Wollman * that counts... 10631158dfb7SGarrett Wollman */ 10641158dfb7SGarrett Wollman return EAFNOSUPPORT; 10651158dfb7SGarrett Wollman } 10661158dfb7SGarrett Wollman } 106740811c14SMatthew N. Dodd 106840811c14SMatthew N. Dodd static moduledata_t ether_mod = { 1069833e8dc5SGleb Smirnoff .name = "ether", 107040811c14SMatthew N. Dodd }; 107140811c14SMatthew N. Dodd 107252f1277eSChristian S.J. Peron void 107352f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 107452f1277eSChristian S.J. Peron { 107552f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 107652f1277eSChristian S.J. Peron struct mbuf mv, mb; 107752f1277eSChristian S.J. Peron 107852f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 107952f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 108052f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 108152f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 108252f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 108352f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 108452f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 108552f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 108652f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 108752f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 108852f1277eSChristian S.J. Peron /* 108952f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 109052f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 109152f1277eSChristian S.J. Peron * 109252f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 109352f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 109452f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 109552f1277eSChristian S.J. Peron * 109652f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 109752f1277eSChristian S.J. Peron */ 109852f1277eSChristian S.J. Peron if (data != NULL) { 109952f1277eSChristian S.J. Peron mv.m_next = m; 110052f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 110152f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 110252f1277eSChristian S.J. Peron mb.m_next = &mv; 110352f1277eSChristian S.J. Peron mb.m_data = data; 110452f1277eSChristian S.J. Peron mb.m_len = dlen; 110552f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 110652f1277eSChristian S.J. Peron } else 110752f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 110852f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 110952f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 111052f1277eSChristian S.J. Peron } 111152f1277eSChristian S.J. Peron 111260e87ca8SAndrew Thompson struct mbuf * 1113a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 111460e87ca8SAndrew Thompson { 111560e87ca8SAndrew Thompson struct ether_vlan_header *evl; 111660e87ca8SAndrew Thompson 1117eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_NOWAIT); 111860e87ca8SAndrew Thompson if (m == NULL) 111960e87ca8SAndrew Thompson return (NULL); 112060e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 112160e87ca8SAndrew Thompson 112260e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 112360e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 112460e87ca8SAndrew Thompson if (m == NULL) 112560e87ca8SAndrew Thompson return (NULL); 112660e87ca8SAndrew Thompson } 112760e87ca8SAndrew Thompson 112860e87ca8SAndrew Thompson /* 112960e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 113060e87ca8SAndrew Thompson * with 802.1Q encapsulation. 113160e87ca8SAndrew Thompson */ 113260e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 113360e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 113460e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 113560e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 113660e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 113760e87ca8SAndrew Thompson return (m); 113860e87ca8SAndrew Thompson } 113960e87ca8SAndrew Thompson 1140fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 114140811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1142