1c398230bSWarner Losh /*- 251369649SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 351369649SPedro F. Giffuni * 4df8bae1dSRodney W. Grimes * Copyright (c) 1982, 1989, 1993 5df8bae1dSRodney W. Grimes * The Regents of the University of California. All rights reserved. 6df8bae1dSRodney W. Grimes * 7df8bae1dSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 8df8bae1dSRodney W. Grimes * modification, are permitted provided that the following conditions 9df8bae1dSRodney W. Grimes * are met: 10df8bae1dSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 11df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 12df8bae1dSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 13df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 14df8bae1dSRodney W. Grimes * documentation and/or other materials provided with the distribution. 15fbbd9655SWarner Losh * 3. Neither the name of the University nor the names of its contributors 16df8bae1dSRodney W. Grimes * may be used to endorse or promote products derived from this software 17df8bae1dSRodney W. Grimes * without specific prior written permission. 18df8bae1dSRodney W. Grimes * 19df8bae1dSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20df8bae1dSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21df8bae1dSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22df8bae1dSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23df8bae1dSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24df8bae1dSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25df8bae1dSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26df8bae1dSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27df8bae1dSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28df8bae1dSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29df8bae1dSRodney W. Grimes * SUCH DAMAGE. 30df8bae1dSRodney W. Grimes * 31df8bae1dSRodney W. Grimes * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93 32c3aac50fSPeter Wemm * $FreeBSD$ 33df8bae1dSRodney W. Grimes */ 34df8bae1dSRodney W. Grimes 351d5e9e22SEivind Eklund #include "opt_inet.h" 36cfa1ca9dSYoshinobu Inoue #include "opt_inet6.h" 374cf49a43SJulian Elischer #include "opt_netgraph.h" 386eeac1d9SJulian Elischer #include "opt_mbuf_profiling.h" 397527624eSRobert Watson #include "opt_rss.h" 40430df5f4SEivind Eklund 41df8bae1dSRodney W. Grimes #include <sys/param.h> 42df8bae1dSRodney W. Grimes #include <sys/systm.h> 438819ad85SSepherosa Ziehau #include <sys/bus.h> 448819ad85SSepherosa Ziehau #include <sys/eventhandler.h> 45df8bae1dSRodney W. Grimes #include <sys/kernel.h> 46385195c0SMarko Zec #include <sys/lock.h> 47df8bae1dSRodney W. Grimes #include <sys/malloc.h> 4841ee9f1cSPoul-Henning Kamp #include <sys/module.h> 49df8bae1dSRodney W. Grimes #include <sys/mbuf.h> 50f1379734SKonstantin Belousov #include <sys/priv.h> 5110b1fde0SMark Murray #include <sys/random.h> 52df8bae1dSRodney W. Grimes #include <sys/socket.h> 5351a53488SBruce Evans #include <sys/sockio.h> 54602d513cSGarrett Wollman #include <sys/sysctl.h> 55ef1f9169SMarcel Moolenaar #include <sys/uuid.h> 56df8bae1dSRodney W. Grimes 57df8bae1dSRodney W. Grimes #include <net/if.h> 5876039bc8SGleb Smirnoff #include <net/if_var.h> 59d7647d96SDag-Erling Smørgrav #include <net/if_arp.h> 60df8bae1dSRodney W. Grimes #include <net/netisr.h> 61df8bae1dSRodney W. Grimes #include <net/route.h> 62df8bae1dSRodney W. Grimes #include <net/if_llc.h> 63df8bae1dSRodney W. Grimes #include <net/if_dl.h> 64df8bae1dSRodney W. Grimes #include <net/if_types.h> 652e2de7f2SArchie Cobbs #include <net/bpf.h> 66e1e1452dSArchie Cobbs #include <net/ethernet.h> 67fd6238a6SAndrew Thompson #include <net/if_bridgevar.h> 68c1d93b05SSam Leffler #include <net/if_vlan_var.h> 696e6b3f7cSQing Li #include <net/if_llatbl.h> 707d4317bdSAlexander V. Chernikov #include <net/pfil.h> 71b2bdc62aSAdrian Chadd #include <net/rss_config.h> 724b79449eSBjoern A. Zeeb #include <net/vnet.h> 73df8bae1dSRodney W. Grimes 7475bf2db3SGleb Smirnoff #include <netpfil/pf/pf_mtag.h> 7575bf2db3SGleb Smirnoff 7682cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 77df8bae1dSRodney W. Grimes #include <netinet/in.h> 78df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 79df8bae1dSRodney W. Grimes #include <netinet/if_ether.h> 8054bfbd51SWill Andrews #include <netinet/ip_carp.h> 810bcfa8e4SLuigi Rizzo #include <netinet/ip_var.h> 821d5e9e22SEivind Eklund #endif 8382cd038dSYoshinobu Inoue #ifdef INET6 8482cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 8582cd038dSYoshinobu Inoue #endif 86aed55708SRobert Watson #include <security/mac/mac_framework.h> 87aed55708SRobert Watson 88d54d93acSEd Maste #ifdef CTASSERT 89d54d93acSEd Maste CTASSERT(sizeof (struct ether_header) == ETHER_ADDR_LEN * 2 + 2); 90d54d93acSEd Maste CTASSERT(sizeof (struct ether_addr) == ETHER_ADDR_LEN); 91d54d93acSEd Maste #endif 92d54d93acSEd Maste 93b252313fSGleb Smirnoff VNET_DEFINE(pfil_head_t, link_pfil_head); /* Packet filter hooks */ 947d4317bdSAlexander V. Chernikov 95e1e1452dSArchie Cobbs /* netgraph node hooks for ng_ether(4) */ 96c1d93b05SSam Leffler void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 97c1d93b05SSam Leffler void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 98e1e1452dSArchie Cobbs int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 99e1e1452dSArchie Cobbs void (*ng_ether_attach_p)(struct ifnet *ifp); 100e1e1452dSArchie Cobbs void (*ng_ether_detach_p)(struct ifnet *ifp); 101e1e1452dSArchie Cobbs 102824eb9dcSDavid E. O'Brien void (*vlan_input_p)(struct ifnet *, struct mbuf *); 1039d4fe4b2SBrooks Davis 104fd6238a6SAndrew Thompson /* if_bridge(4) support */ 105c8b01292SAndrew Thompson void (*bridge_dn_p)(struct mbuf *, struct ifnet *); 1068f867517SAndrew Thompson 10718242d3bSAndrew Thompson /* if_lagg(4) support */ 10818242d3bSAndrew Thompson struct mbuf *(*lagg_input_p)(struct ifnet *, struct mbuf *); 109b47888ceSAndrew Thompson 110e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 111868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 112868d8b62SMatthew N. Dodd 113929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 114929ddbbbSAlfred Perlstein struct sockaddr *); 115d3c351c5SMarko Zec #ifdef VIMAGE 116d3c351c5SMarko Zec static void ether_reassign(struct ifnet *, struct vnet *, char *); 117d3c351c5SMarko Zec #endif 1184fb3a820SAlexander V. Chernikov static int ether_requestencap(struct ifnet *, struct if_encap_req *); 119868d8b62SMatthew N. Dodd 12069462a82SBruce M Simpson 1214c8e8c05SJulian Elischer #define senderr(e) do { error = (e); goto bad;} while (0) 122df8bae1dSRodney W. Grimes 12322f8ce43SAlexander V. Chernikov static void 12422f8ce43SAlexander V. Chernikov update_mbuf_csumflags(struct mbuf *src, struct mbuf *dst) 12522f8ce43SAlexander V. Chernikov { 12622f8ce43SAlexander V. Chernikov int csum_flags = 0; 12722f8ce43SAlexander V. Chernikov 12822f8ce43SAlexander V. Chernikov if (src->m_pkthdr.csum_flags & CSUM_IP) 12922f8ce43SAlexander V. Chernikov csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 13022f8ce43SAlexander V. Chernikov if (src->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 13122f8ce43SAlexander V. Chernikov csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 13222f8ce43SAlexander V. Chernikov if (src->m_pkthdr.csum_flags & CSUM_SCTP) 13322f8ce43SAlexander V. Chernikov csum_flags |= CSUM_SCTP_VALID; 13422f8ce43SAlexander V. Chernikov dst->m_pkthdr.csum_flags |= csum_flags; 13522f8ce43SAlexander V. Chernikov if (csum_flags & CSUM_DATA_VALID) 13622f8ce43SAlexander V. Chernikov dst->m_pkthdr.csum_data = 0xffff; 13722f8ce43SAlexander V. Chernikov } 13822f8ce43SAlexander V. Chernikov 139df8bae1dSRodney W. Grimes /* 1404fb3a820SAlexander V. Chernikov * Handle link-layer encapsulation requests. 1414fb3a820SAlexander V. Chernikov */ 1424fb3a820SAlexander V. Chernikov static int 1434fb3a820SAlexander V. Chernikov ether_requestencap(struct ifnet *ifp, struct if_encap_req *req) 1444fb3a820SAlexander V. Chernikov { 1454fb3a820SAlexander V. Chernikov struct ether_header *eh; 1464fb3a820SAlexander V. Chernikov struct arphdr *ah; 1474fb3a820SAlexander V. Chernikov uint16_t etype; 1484fb3a820SAlexander V. Chernikov const u_char *lladdr; 1494fb3a820SAlexander V. Chernikov 1504fb3a820SAlexander V. Chernikov if (req->rtype != IFENCAP_LL) 1514fb3a820SAlexander V. Chernikov return (EOPNOTSUPP); 1524fb3a820SAlexander V. Chernikov 1534fb3a820SAlexander V. Chernikov if (req->bufsize < ETHER_HDR_LEN) 1544fb3a820SAlexander V. Chernikov return (ENOMEM); 1554fb3a820SAlexander V. Chernikov 1564fb3a820SAlexander V. Chernikov eh = (struct ether_header *)req->buf; 1574fb3a820SAlexander V. Chernikov lladdr = req->lladdr; 1584fb3a820SAlexander V. Chernikov req->lladdr_off = 0; 1594fb3a820SAlexander V. Chernikov 1604fb3a820SAlexander V. Chernikov switch (req->family) { 1614fb3a820SAlexander V. Chernikov case AF_INET: 1624fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_IP); 1634fb3a820SAlexander V. Chernikov break; 1644fb3a820SAlexander V. Chernikov case AF_INET6: 1654fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_IPV6); 1664fb3a820SAlexander V. Chernikov break; 1674fb3a820SAlexander V. Chernikov case AF_ARP: 1684fb3a820SAlexander V. Chernikov ah = (struct arphdr *)req->hdata; 1694fb3a820SAlexander V. Chernikov ah->ar_hrd = htons(ARPHRD_ETHER); 1704fb3a820SAlexander V. Chernikov 1714fb3a820SAlexander V. Chernikov switch(ntohs(ah->ar_op)) { 1724fb3a820SAlexander V. Chernikov case ARPOP_REVREQUEST: 1734fb3a820SAlexander V. Chernikov case ARPOP_REVREPLY: 1744fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_REVARP); 1754fb3a820SAlexander V. Chernikov break; 1764fb3a820SAlexander V. Chernikov case ARPOP_REQUEST: 1774fb3a820SAlexander V. Chernikov case ARPOP_REPLY: 1784fb3a820SAlexander V. Chernikov default: 1794fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_ARP); 1804fb3a820SAlexander V. Chernikov break; 1814fb3a820SAlexander V. Chernikov } 1824fb3a820SAlexander V. Chernikov 1834fb3a820SAlexander V. Chernikov if (req->flags & IFENCAP_FLAG_BROADCAST) 1844fb3a820SAlexander V. Chernikov lladdr = ifp->if_broadcastaddr; 1854fb3a820SAlexander V. Chernikov break; 1864fb3a820SAlexander V. Chernikov default: 1874fb3a820SAlexander V. Chernikov return (EAFNOSUPPORT); 1884fb3a820SAlexander V. Chernikov } 1894fb3a820SAlexander V. Chernikov 1904fb3a820SAlexander V. Chernikov memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 1914fb3a820SAlexander V. Chernikov memcpy(eh->ether_dhost, lladdr, ETHER_ADDR_LEN); 1924fb3a820SAlexander V. Chernikov memcpy(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN); 1934fb3a820SAlexander V. Chernikov req->bufsize = sizeof(struct ether_header); 1944fb3a820SAlexander V. Chernikov 1954fb3a820SAlexander V. Chernikov return (0); 1964fb3a820SAlexander V. Chernikov } 1974fb3a820SAlexander V. Chernikov 1984fb3a820SAlexander V. Chernikov 1994fb3a820SAlexander V. Chernikov static int 2004fb3a820SAlexander V. Chernikov ether_resolve_addr(struct ifnet *ifp, struct mbuf *m, 2014fb3a820SAlexander V. Chernikov const struct sockaddr *dst, struct route *ro, u_char *phdr, 2026d768226SGeorge V. Neville-Neil uint32_t *pflags, struct llentry **plle) 2034fb3a820SAlexander V. Chernikov { 2044fb3a820SAlexander V. Chernikov struct ether_header *eh; 2054fb3a820SAlexander V. Chernikov uint32_t lleflags = 0; 2064fb3a820SAlexander V. Chernikov int error = 0; 2074fb3a820SAlexander V. Chernikov #if defined(INET) || defined(INET6) 2084fb3a820SAlexander V. Chernikov uint16_t etype; 2094fb3a820SAlexander V. Chernikov #endif 2104fb3a820SAlexander V. Chernikov 2116d768226SGeorge V. Neville-Neil if (plle) 2126d768226SGeorge V. Neville-Neil *plle = NULL; 2134fb3a820SAlexander V. Chernikov eh = (struct ether_header *)phdr; 2144fb3a820SAlexander V. Chernikov 2154fb3a820SAlexander V. Chernikov switch (dst->sa_family) { 2164fb3a820SAlexander V. Chernikov #ifdef INET 2174fb3a820SAlexander V. Chernikov case AF_INET: 2184fb3a820SAlexander V. Chernikov if ((m->m_flags & (M_BCAST | M_MCAST)) == 0) 2196d768226SGeorge V. Neville-Neil error = arpresolve(ifp, 0, m, dst, phdr, &lleflags, 2206d768226SGeorge V. Neville-Neil plle); 2214fb3a820SAlexander V. Chernikov else { 2224fb3a820SAlexander V. Chernikov if (m->m_flags & M_BCAST) 2234fb3a820SAlexander V. Chernikov memcpy(eh->ether_dhost, ifp->if_broadcastaddr, 2244fb3a820SAlexander V. Chernikov ETHER_ADDR_LEN); 2254fb3a820SAlexander V. Chernikov else { 2264fb3a820SAlexander V. Chernikov const struct in_addr *a; 2274fb3a820SAlexander V. Chernikov a = &(((const struct sockaddr_in *)dst)->sin_addr); 2284fb3a820SAlexander V. Chernikov ETHER_MAP_IP_MULTICAST(a, eh->ether_dhost); 2294fb3a820SAlexander V. Chernikov } 2304fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_IP); 2314fb3a820SAlexander V. Chernikov memcpy(&eh->ether_type, &etype, sizeof(etype)); 2324fb3a820SAlexander V. Chernikov memcpy(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN); 2334fb3a820SAlexander V. Chernikov } 2344fb3a820SAlexander V. Chernikov break; 2354fb3a820SAlexander V. Chernikov #endif 2364fb3a820SAlexander V. Chernikov #ifdef INET6 2374fb3a820SAlexander V. Chernikov case AF_INET6: 2384fb3a820SAlexander V. Chernikov if ((m->m_flags & M_MCAST) == 0) 2396d768226SGeorge V. Neville-Neil error = nd6_resolve(ifp, 0, m, dst, phdr, &lleflags, 2406d768226SGeorge V. Neville-Neil plle); 2414fb3a820SAlexander V. Chernikov else { 2424fb3a820SAlexander V. Chernikov const struct in6_addr *a6; 2434fb3a820SAlexander V. Chernikov a6 = &(((const struct sockaddr_in6 *)dst)->sin6_addr); 2444fb3a820SAlexander V. Chernikov ETHER_MAP_IPV6_MULTICAST(a6, eh->ether_dhost); 2454fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_IPV6); 2464fb3a820SAlexander V. Chernikov memcpy(&eh->ether_type, &etype, sizeof(etype)); 2474fb3a820SAlexander V. Chernikov memcpy(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN); 2484fb3a820SAlexander V. Chernikov } 2494fb3a820SAlexander V. Chernikov break; 2504fb3a820SAlexander V. Chernikov #endif 2514fb3a820SAlexander V. Chernikov default: 2524fb3a820SAlexander V. Chernikov if_printf(ifp, "can't handle af%d\n", dst->sa_family); 2534fb3a820SAlexander V. Chernikov if (m != NULL) 2544fb3a820SAlexander V. Chernikov m_freem(m); 2554fb3a820SAlexander V. Chernikov return (EAFNOSUPPORT); 2564fb3a820SAlexander V. Chernikov } 2574fb3a820SAlexander V. Chernikov 2584fb3a820SAlexander V. Chernikov if (error == EHOSTDOWN) { 25936402a68SAlexander V. Chernikov if (ro != NULL && (ro->ro_flags & RT_HAS_GW) != 0) 2604fb3a820SAlexander V. Chernikov error = EHOSTUNREACH; 2614fb3a820SAlexander V. Chernikov } 2624fb3a820SAlexander V. Chernikov 2634fb3a820SAlexander V. Chernikov if (error != 0) 2644fb3a820SAlexander V. Chernikov return (error); 2654fb3a820SAlexander V. Chernikov 2664fb3a820SAlexander V. Chernikov *pflags = RT_MAY_LOOP; 2674fb3a820SAlexander V. Chernikov if (lleflags & LLE_IFADDR) 2684fb3a820SAlexander V. Chernikov *pflags |= RT_L2_ME; 2694fb3a820SAlexander V. Chernikov 2704fb3a820SAlexander V. Chernikov return (0); 2714fb3a820SAlexander V. Chernikov } 2724fb3a820SAlexander V. Chernikov 2734fb3a820SAlexander V. Chernikov /* 274df8bae1dSRodney W. Grimes * Ethernet output routine. 275df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 276df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 277df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 278df8bae1dSRodney W. Grimes */ 279df8bae1dSRodney W. Grimes int 28072fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 28147e8d432SGleb Smirnoff const struct sockaddr *dst, struct route *ro) 282df8bae1dSRodney W. Grimes { 2834fb3a820SAlexander V. Chernikov int error = 0; 2844fb3a820SAlexander V. Chernikov char linkhdr[ETHER_HDR_LEN], *phdr; 285098a8c3bSMatthew N. Dodd struct ether_header *eh; 28660ee3847SMax Laier struct pf_mtag *t; 287c54c76ccSOleg Bulyzhin int loop_copy = 1; 288d32864c3SRobert Watson int hlen; /* link layer header length */ 2894fb3a820SAlexander V. Chernikov uint32_t pflags; 2906d768226SGeorge V. Neville-Neil struct llentry *lle = NULL; 2916d768226SGeorge V. Neville-Neil int addref = 0; 292df8bae1dSRodney W. Grimes 2934fb3a820SAlexander V. Chernikov phdr = NULL; 2944fb3a820SAlexander V. Chernikov pflags = 0; 295279aa3d4SKip Macy if (ro != NULL) { 2966d768226SGeorge V. Neville-Neil /* XXX BPF uses ro_prepend */ 2976d768226SGeorge V. Neville-Neil if (ro->ro_prepend != NULL) { 2984fb3a820SAlexander V. Chernikov phdr = ro->ro_prepend; 2994fb3a820SAlexander V. Chernikov hlen = ro->ro_plen; 3006d768226SGeorge V. Neville-Neil } else if (!(m->m_flags & (M_BCAST | M_MCAST))) { 3016d768226SGeorge V. Neville-Neil if ((ro->ro_flags & RT_LLE_CACHE) != 0) { 3026d768226SGeorge V. Neville-Neil lle = ro->ro_lle; 3036d768226SGeorge V. Neville-Neil if (lle != NULL && 3046d768226SGeorge V. Neville-Neil (lle->la_flags & LLE_VALID) == 0) { 3056d768226SGeorge V. Neville-Neil LLE_FREE(lle); 3066d768226SGeorge V. Neville-Neil lle = NULL; /* redundant */ 3076d768226SGeorge V. Neville-Neil ro->ro_lle = NULL; 308279aa3d4SKip Macy } 3096d768226SGeorge V. Neville-Neil if (lle == NULL) { 3106d768226SGeorge V. Neville-Neil /* if we lookup, keep cache */ 3116d768226SGeorge V. Neville-Neil addref = 1; 3121435dcd9SAlexander V. Chernikov } else 3131435dcd9SAlexander V. Chernikov /* 3141435dcd9SAlexander V. Chernikov * Notify LLE code that 3151435dcd9SAlexander V. Chernikov * the entry was used 3161435dcd9SAlexander V. Chernikov * by datapath. 3171435dcd9SAlexander V. Chernikov */ 3181435dcd9SAlexander V. Chernikov llentry_mark_used(lle); 3196d768226SGeorge V. Neville-Neil } 3206d768226SGeorge V. Neville-Neil if (lle != NULL) { 3216d768226SGeorge V. Neville-Neil phdr = lle->r_linkdata; 3226d768226SGeorge V. Neville-Neil hlen = lle->r_hdrlen; 3236d768226SGeorge V. Neville-Neil pflags = lle->r_flags; 3246d768226SGeorge V. Neville-Neil } 3256d768226SGeorge V. Neville-Neil } 3266d768226SGeorge V. Neville-Neil } 3276d768226SGeorge V. Neville-Neil 32843b29369SRobert Watson #ifdef MAC 32930d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 33043b29369SRobert Watson if (error) 33143b29369SRobert Watson senderr(error); 33243b29369SRobert Watson #endif 33343b29369SRobert Watson 3346eeac1d9SJulian Elischer M_PROFILE(m); 335afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 336afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 33713f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 33813f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 339df8bae1dSRodney W. Grimes senderr(ENETDOWN); 3407f760c48SMatthew N. Dodd 3414fb3a820SAlexander V. Chernikov if (phdr == NULL) { 3424fb3a820SAlexander V. Chernikov /* No prepend data supplied. Try to calculate ourselves. */ 3434fb3a820SAlexander V. Chernikov phdr = linkhdr; 34484dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 3456d768226SGeorge V. Neville-Neil error = ether_resolve_addr(ifp, m, dst, ro, phdr, &pflags, 3466d768226SGeorge V. Neville-Neil addref ? &lle : NULL); 3476d768226SGeorge V. Neville-Neil if (addref && lle != NULL) 3486d768226SGeorge V. Neville-Neil ro->ro_lle = lle; 3494fb3a820SAlexander V. Chernikov if (error != 0) 350cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 35143a6c75aSMatthew N. Dodd } 35243a6c75aSMatthew N. Dodd 3534fb3a820SAlexander V. Chernikov if ((pflags & RT_L2_ME) != 0) { 35422f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, m); 3556e6b3f7cSQing Li return (if_simloop(ifp, m, dst->sa_family, 0)); 3566e6b3f7cSQing Li } 3574fb3a820SAlexander V. Chernikov loop_copy = pflags & RT_MAY_LOOP; 3586e6b3f7cSQing Li 359df8bae1dSRodney W. Grimes /* 360df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 361df8bae1dSRodney W. Grimes * allocate another. 3626cdb1854SAlexander V. Chernikov * 3636cdb1854SAlexander V. Chernikov * Note that we do prepend regardless of RT_HAS_HEADER flag. 3646cdb1854SAlexander V. Chernikov * This is done because BPF code shifts m_data pointer 3656cdb1854SAlexander V. Chernikov * to the end of ethernet header prior to calling if_output(). 366df8bae1dSRodney W. Grimes */ 3674fb3a820SAlexander V. Chernikov M_PREPEND(m, hlen, M_NOWAIT); 3682166ffe8SRobert Watson if (m == NULL) 369df8bae1dSRodney W. Grimes senderr(ENOBUFS); 3704fb3a820SAlexander V. Chernikov if ((pflags & RT_HAS_HEADER) == 0) { 371df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 3724fb3a820SAlexander V. Chernikov memcpy(eh, phdr, hlen); 373c69aeaadSAlexander V. Chernikov } 374ed7509acSJulian Elischer 375ed7509acSJulian Elischer /* 376ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 377ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 378ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 379ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 380ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 381ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 382ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 383ed7509acSJulian Elischer */ 3844fb3a820SAlexander V. Chernikov if ((m->m_flags & M_BCAST) && loop_copy && (ifp->if_flags & IFF_SIMPLEX) && 38560ee3847SMax Laier ((t = pf_find_mtag(m)) == NULL || !t->routed)) { 38606f684b0SMatthew N. Dodd struct mbuf *n; 387ed7509acSJulian Elischer 388294dd290SLuigi Rizzo /* 389294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 390294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 391294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 392294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 393294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 394294dd290SLuigi Rizzo * extra data copying vs. extra locking). 3959983b3c0SYaroslav Tykhiy * 3969983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 3979983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 3989983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 399294dd290SLuigi Rizzo */ 400eb1b1807SGleb Smirnoff if ((n = m_dup(m, M_NOWAIT)) != NULL) { 40122f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, n); 40206a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 403c1404dc0SArchie Cobbs } else 4043751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 405ed7509acSJulian Elischer } 4062e2de7f2SArchie Cobbs 4073f7d1396SAndrew Thompson /* 4083f7d1396SAndrew Thompson * Bridges require special output handling. 4093f7d1396SAndrew Thompson */ 4103f7d1396SAndrew Thompson if (ifp->if_bridge) { 4113f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 4123f7d1396SAndrew Thompson return (error); 4133f7d1396SAndrew Thompson } 4143f7d1396SAndrew Thompson 415259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 416a9771948SGleb Smirnoff if (ifp->if_carp && 41708b68b0eSGleb Smirnoff (error = (*carp_output_p)(ifp, m, dst))) 418a9771948SGleb Smirnoff goto bad; 419a9771948SGleb Smirnoff #endif 420a9771948SGleb Smirnoff 421e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 422833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 423514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 424514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 425e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 426e1e1452dSArchie Cobbs bad: if (m != NULL) 427e1e1452dSArchie Cobbs m_freem(m); 428e1e1452dSArchie Cobbs return (error); 429e1e1452dSArchie Cobbs } 430e1e1452dSArchie Cobbs if (m == NULL) 431e1e1452dSArchie Cobbs return (0); 432e1e1452dSArchie Cobbs } 433e1e1452dSArchie Cobbs 434e1e1452dSArchie Cobbs /* Continue with link-layer output */ 435e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 436e1e1452dSArchie Cobbs } 437e1e1452dSArchie Cobbs 438f1379734SKonstantin Belousov static bool 439f1379734SKonstantin Belousov ether_set_pcp(struct mbuf **mp, struct ifnet *ifp, uint8_t pcp) 440f1379734SKonstantin Belousov { 441f1379734SKonstantin Belousov struct ether_header *eh; 442f1379734SKonstantin Belousov 443f1379734SKonstantin Belousov eh = mtod(*mp, struct ether_header *); 444f1379734SKonstantin Belousov if (ntohs(eh->ether_type) == ETHERTYPE_VLAN || 445f1379734SKonstantin Belousov ether_8021q_frame(mp, ifp, ifp, 0, pcp)) 446f1379734SKonstantin Belousov return (true); 447f1379734SKonstantin Belousov if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 448f1379734SKonstantin Belousov return (false); 449f1379734SKonstantin Belousov } 450f1379734SKonstantin Belousov 451e1e1452dSArchie Cobbs /* 452e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 453e1e1452dSArchie Cobbs * 454e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 455e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 456e1e1452dSArchie Cobbs */ 457e1e1452dSArchie Cobbs int 458c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 459e1e1452dSArchie Cobbs { 460f1379734SKonstantin Belousov uint8_t pcp; 461f1379734SKonstantin Belousov 462f1379734SKonstantin Belousov pcp = ifp->if_pcp; 46347c39432SNavdeep Parhar if (pcp != IFNET_PCP_NONE && ifp->if_type != IFT_L2VLAN && 46447c39432SNavdeep Parhar !ether_set_pcp(&m, ifp, pcp)) 465f1379734SKonstantin Belousov return (0); 4662b25acc1SLuigi Rizzo 467b252313fSGleb Smirnoff if (PFIL_HOOKED_OUT(V_link_pfil_head)) 468b252313fSGleb Smirnoff switch (pfil_run_hooks(V_link_pfil_head, &m, ifp, PFIL_OUT, 469b252313fSGleb Smirnoff NULL)) { 470b252313fSGleb Smirnoff case PFIL_DROPPED: 4717d4317bdSAlexander V. Chernikov return (EACCES); 472b252313fSGleb Smirnoff case PFIL_CONSUMED: 4737d4317bdSAlexander V. Chernikov return (0); 4744b984093SLuigi Rizzo } 4752b25acc1SLuigi Rizzo 476201100c5SBjoern A. Zeeb #ifdef EXPERIMENTAL 477201100c5SBjoern A. Zeeb #if defined(INET6) && defined(INET) 478201100c5SBjoern A. Zeeb /* draft-ietf-6man-ipv6only-flag */ 479201100c5SBjoern A. Zeeb /* Catch ETHERTYPE_IP, and ETHERTYPE_ARP if we are v6-only. */ 480201100c5SBjoern A. Zeeb if ((ND_IFINFO(ifp)->flags & ND6_IFF_IPV6_ONLY) != 0) { 481201100c5SBjoern A. Zeeb struct ether_header *eh; 482201100c5SBjoern A. Zeeb 483201100c5SBjoern A. Zeeb eh = mtod(m, struct ether_header *); 484201100c5SBjoern A. Zeeb switch (ntohs(eh->ether_type)) { 485201100c5SBjoern A. Zeeb case ETHERTYPE_IP: 486201100c5SBjoern A. Zeeb case ETHERTYPE_ARP: 487201100c5SBjoern A. Zeeb m_freem(m); 488201100c5SBjoern A. Zeeb return (EAFNOSUPPORT); 489201100c5SBjoern A. Zeeb /* NOTREACHED */ 490201100c5SBjoern A. Zeeb break; 491201100c5SBjoern A. Zeeb }; 492201100c5SBjoern A. Zeeb } 493201100c5SBjoern A. Zeeb #endif 494201100c5SBjoern A. Zeeb #endif 495201100c5SBjoern A. Zeeb 496df8bae1dSRodney W. Grimes /* 497df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 498df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 499df8bae1dSRodney W. Grimes */ 500aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 501df8bae1dSRodney W. Grimes } 502df8bae1dSRodney W. Grimes 5034b984093SLuigi Rizzo /* 504c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 505c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 506df8bae1dSRodney W. Grimes */ 507c1d93b05SSam Leffler static void 5086cb52192SRobert Watson ether_input_internal(struct ifnet *ifp, struct mbuf *m) 509df8bae1dSRodney W. Grimes { 510c1d93b05SSam Leffler struct ether_header *eh; 511c1d93b05SSam Leffler u_short etype; 512df8bae1dSRodney W. Grimes 51369462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 51469462a82SBruce M Simpson m_freem(m); 51569462a82SBruce M Simpson return; 51669462a82SBruce M Simpson } 51769462a82SBruce M Simpson #ifdef DIAGNOSTIC 51869462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 51969462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 52069462a82SBruce M Simpson m_freem(m); 52169462a82SBruce M Simpson return; 52269462a82SBruce M Simpson } 52369462a82SBruce M Simpson #endif 524797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 525c1d93b05SSam Leffler /* XXX maybe should pullup? */ 526c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 527c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 528c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 5293751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 530c1d93b05SSam Leffler m_freem(m); 531c1d93b05SSam Leffler return; 5322e2de7f2SArchie Cobbs } 533c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 534c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 53519fa89e9SMark Murray random_harvest_queue_ether(m, sizeof(*m)); 536d1b06863SMark Murray 53721ca7b57SMarko Zec CURVNET_SET_QUIET(ifp->if_vnet); 53821ca7b57SMarko Zec 53969462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 54069462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 54169462a82SBruce M Simpson m->m_flags |= M_BCAST; 54269462a82SBruce M Simpson else 54369462a82SBruce M Simpson m->m_flags |= M_MCAST; 5443751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1); 54569462a82SBruce M Simpson } 54669462a82SBruce M Simpson 547533d8562SRobert Watson #ifdef MAC 548533d8562SRobert Watson /* 549533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 550533d8562SRobert Watson * consumers can get to it. 551533d8562SRobert Watson */ 55230d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 553533d8562SRobert Watson #endif 554533d8562SRobert Watson 555c1d93b05SSam Leffler /* 55669462a82SBruce M Simpson * Give bpf a chance at the packet. 557c1d93b05SSam Leffler */ 558d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 5592e2de7f2SArchie Cobbs 56069462a82SBruce M Simpson /* 56169462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 56269462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 56369462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 56469462a82SBruce M Simpson */ 565c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 566c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 567c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 568c1d93b05SSam Leffler } 569c1d93b05SSam Leffler 5704cdc1f54SGleb Smirnoff if (!(ifp->if_capenable & IFCAP_HWSTATS)) 5713751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 57205463bb5SDavid Greenman 57369462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 574de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 575de572b37SChristian S.J. Peron m_freem(m); 57621ca7b57SMarko Zec CURVNET_RESTORE(); 577de572b37SChristian S.J. Peron return; 578de572b37SChristian S.J. Peron } 579de572b37SChristian S.J. Peron 58018242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 581b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 58218242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 58318242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 58418242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 585b47888ceSAndrew Thompson if (m != NULL) 586b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 5872db13e75SMarko Zec else { 5882db13e75SMarko Zec CURVNET_RESTORE(); 589b47888ceSAndrew Thompson return; 590b47888ceSAndrew Thompson } 5912db13e75SMarko Zec } 592b47888ceSAndrew Thompson 59369462a82SBruce M Simpson /* 59469462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 59569462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 59669462a82SBruce M Simpson * path correctly. 59769462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 59869462a82SBruce M Simpson */ 59969462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 60069462a82SBruce M Simpson struct ether_vlan_header *evl; 60169462a82SBruce M Simpson 60269462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 60369462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 604402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 60569462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 606402d5e27SBruce M Simpson #endif 6073751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 6082db13e75SMarko Zec CURVNET_RESTORE(); 60969462a82SBruce M Simpson return; 61069462a82SBruce M Simpson } 61169462a82SBruce M Simpson 61269462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 61369462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 61469462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 61569462a82SBruce M Simpson 61669462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 61769462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 61869462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 61997cce87fSGleb Smirnoff eh = mtod(m, struct ether_header *); 62069462a82SBruce M Simpson } 62169462a82SBruce M Simpson 622a34c6aebSBjoern A. Zeeb M_SETFIB(m, ifp->if_fib); 623a34c6aebSBjoern A. Zeeb 62469462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 625833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 626514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 62769462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 62869462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 629c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 63021ca7b57SMarko Zec if (m == NULL) { 63121ca7b57SMarko Zec CURVNET_RESTORE(); 632e1e1452dSArchie Cobbs return; 633e1e1452dSArchie Cobbs } 6345e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 63521ca7b57SMarko Zec } 636e1e1452dSArchie Cobbs 6378f867517SAndrew Thompson /* 63869462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 63969462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 64069462a82SBruce M Simpson * and the frame should be delivered locally. 6418f867517SAndrew Thompson */ 64269462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 64369462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 644fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 64521ca7b57SMarko Zec if (m == NULL) { 64621ca7b57SMarko Zec CURVNET_RESTORE(); 6478f867517SAndrew Thompson return; 6488f867517SAndrew Thompson } 6495e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 65021ca7b57SMarko Zec } 6518f867517SAndrew Thompson 652259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 65369462a82SBruce M Simpson /* 65469462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 65569462a82SBruce M Simpson * mbuf flows up to Layer 3. 65669462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 65769462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 65869462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 65969462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 66069462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 66169462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 66269462a82SBruce M Simpson */ 66354bfbd51SWill Andrews if (ifp->if_carp && (*carp_forus_p)(ifp, eh->ether_dhost)) { 66469462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 66569462a82SBruce M Simpson } else 66669462a82SBruce M Simpson #endif 66769462a82SBruce M Simpson { 66869462a82SBruce M Simpson /* 669e7f8c833SBruce M Simpson * If the frame received was not for our MAC address, set the 67069462a82SBruce M Simpson * M_PROMISC flag on the mbuf chain. The frame may need to 67169462a82SBruce M Simpson * be seen by the rest of the Ethernet input path in case of 67269462a82SBruce M Simpson * re-entry (e.g. bridge, vlan, netgraph) but should not be 67369462a82SBruce M Simpson * seen by upper protocol layers. 67469462a82SBruce M Simpson */ 67569462a82SBruce M Simpson if (!ETHER_IS_MULTICAST(eh->ether_dhost) && 676e7f8c833SBruce M Simpson bcmp(IF_LLADDR(ifp), eh->ether_dhost, ETHER_ADDR_LEN) != 0) 67769462a82SBruce M Simpson m->m_flags |= M_PROMISC; 67869462a82SBruce M Simpson } 67969462a82SBruce M Simpson 680acf032f5SRobert Watson ether_demux(ifp, m); 68121ca7b57SMarko Zec CURVNET_RESTORE(); 682e1e1452dSArchie Cobbs } 683e1e1452dSArchie Cobbs 684e1e1452dSArchie Cobbs /* 6856cb52192SRobert Watson * Ethernet input dispatch; by default, direct dispatch here regardless of 6867527624eSRobert Watson * global configuration. However, if RSS is enabled, hook up RSS affinity 6877527624eSRobert Watson * so that when deferred or hybrid dispatch is enabled, we can redistribute 6887527624eSRobert Watson * load based on RSS. 6897527624eSRobert Watson * 6907527624eSRobert Watson * XXXRW: Would be nice if the ifnet passed up a flag indicating whether or 6917527624eSRobert Watson * not it had already done work distribution via multi-queue. Then we could 6927527624eSRobert Watson * direct dispatch in the event load balancing was already complete and 6937527624eSRobert Watson * handle the case of interfaces with different capabilities better. 6947527624eSRobert Watson * 6957527624eSRobert Watson * XXXRW: Sort of want an M_DISTRIBUTED flag to avoid multiple distributions 6967527624eSRobert Watson * at multiple layers? 6977527624eSRobert Watson * 6987527624eSRobert Watson * XXXRW: For now, enable all this only if RSS is compiled in, although it 6997527624eSRobert Watson * works fine without RSS. Need to characterise the performance overhead 7007527624eSRobert Watson * of the detour through the netisr code in the event the result is always 7017527624eSRobert Watson * direct dispatch. 7026cb52192SRobert Watson */ 7036cb52192SRobert Watson static void 7046cb52192SRobert Watson ether_nh_input(struct mbuf *m) 7056cb52192SRobert Watson { 7066cb52192SRobert Watson 707b71bed24SAndrey V. Elsukov M_ASSERTPKTHDR(m); 708b71bed24SAndrey V. Elsukov KASSERT(m->m_pkthdr.rcvif != NULL, 709b71bed24SAndrey V. Elsukov ("%s: NULL interface pointer", __func__)); 7106cb52192SRobert Watson ether_input_internal(m->m_pkthdr.rcvif, m); 7116cb52192SRobert Watson } 7126cb52192SRobert Watson 7136cb52192SRobert Watson static struct netisr_handler ether_nh = { 7146cb52192SRobert Watson .nh_name = "ether", 7156cb52192SRobert Watson .nh_handler = ether_nh_input, 7166cb52192SRobert Watson .nh_proto = NETISR_ETHER, 7177527624eSRobert Watson #ifdef RSS 7187527624eSRobert Watson .nh_policy = NETISR_POLICY_CPU, 7197527624eSRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 7207527624eSRobert Watson .nh_m2cpuid = rss_m2cpuid, 7217527624eSRobert Watson #else 7226cb52192SRobert Watson .nh_policy = NETISR_POLICY_SOURCE, 7236cb52192SRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 7247527624eSRobert Watson #endif 7256cb52192SRobert Watson }; 7266cb52192SRobert Watson 7276cb52192SRobert Watson static void 7286cb52192SRobert Watson ether_init(__unused void *arg) 7296cb52192SRobert Watson { 7306cb52192SRobert Watson 7316cb52192SRobert Watson netisr_register(ðer_nh); 7326cb52192SRobert Watson } 7336cb52192SRobert Watson SYSINIT(ether, SI_SUB_INIT_IF, SI_ORDER_ANY, ether_init, NULL); 7346cb52192SRobert Watson 7356cb52192SRobert Watson static void 7367d4317bdSAlexander V. Chernikov vnet_ether_init(__unused void *arg) 7377d4317bdSAlexander V. Chernikov { 738b252313fSGleb Smirnoff struct pfil_head_args args; 7397d4317bdSAlexander V. Chernikov 740b252313fSGleb Smirnoff args.pa_version = PFIL_VERSION; 741b252313fSGleb Smirnoff args.pa_flags = PFIL_IN | PFIL_OUT; 742b252313fSGleb Smirnoff args.pa_type = PFIL_TYPE_ETHERNET; 743b252313fSGleb Smirnoff args.pa_headname = PFIL_ETHER_NAME; 744b252313fSGleb Smirnoff V_link_pfil_head = pfil_head_register(&args); 745b252313fSGleb Smirnoff 746484149deSBjoern A. Zeeb #ifdef VIMAGE 747484149deSBjoern A. Zeeb netisr_register_vnet(ðer_nh); 748484149deSBjoern A. Zeeb #endif 7497d4317bdSAlexander V. Chernikov } 7507d4317bdSAlexander V. Chernikov VNET_SYSINIT(vnet_ether_init, SI_SUB_PROTO_IF, SI_ORDER_ANY, 7517d4317bdSAlexander V. Chernikov vnet_ether_init, NULL); 7527d4317bdSAlexander V. Chernikov 753484149deSBjoern A. Zeeb #ifdef VIMAGE 7547d4317bdSAlexander V. Chernikov static void 755484149deSBjoern A. Zeeb vnet_ether_pfil_destroy(__unused void *arg) 7567d4317bdSAlexander V. Chernikov { 7577d4317bdSAlexander V. Chernikov 758b252313fSGleb Smirnoff pfil_head_unregister(V_link_pfil_head); 7597d4317bdSAlexander V. Chernikov } 760484149deSBjoern A. Zeeb VNET_SYSUNINIT(vnet_ether_pfil_uninit, SI_SUB_PROTO_PFIL, SI_ORDER_ANY, 761484149deSBjoern A. Zeeb vnet_ether_pfil_destroy, NULL); 762484149deSBjoern A. Zeeb 763484149deSBjoern A. Zeeb static void 764484149deSBjoern A. Zeeb vnet_ether_destroy(__unused void *arg) 765484149deSBjoern A. Zeeb { 766484149deSBjoern A. Zeeb 767484149deSBjoern A. Zeeb netisr_unregister_vnet(ðer_nh); 768484149deSBjoern A. Zeeb } 7697d4317bdSAlexander V. Chernikov VNET_SYSUNINIT(vnet_ether_uninit, SI_SUB_PROTO_IF, SI_ORDER_ANY, 7707d4317bdSAlexander V. Chernikov vnet_ether_destroy, NULL); 771484149deSBjoern A. Zeeb #endif 7727d4317bdSAlexander V. Chernikov 7737d4317bdSAlexander V. Chernikov 7747d4317bdSAlexander V. Chernikov 7757d4317bdSAlexander V. Chernikov static void 7766cb52192SRobert Watson ether_input(struct ifnet *ifp, struct mbuf *m) 7776cb52192SRobert Watson { 7786cb52192SRobert Watson 7794857f5fbSGeorge V. Neville-Neil struct mbuf *mn; 7804857f5fbSGeorge V. Neville-Neil 7814857f5fbSGeorge V. Neville-Neil /* 7824857f5fbSGeorge V. Neville-Neil * The drivers are allowed to pass in a chain of packets linked with 7834857f5fbSGeorge V. Neville-Neil * m_nextpkt. We split them up into separate packets here and pass 7844857f5fbSGeorge V. Neville-Neil * them up. This allows the drivers to amortize the receive lock. 7854857f5fbSGeorge V. Neville-Neil */ 7864857f5fbSGeorge V. Neville-Neil while (m) { 7874857f5fbSGeorge V. Neville-Neil mn = m->m_nextpkt; 7884857f5fbSGeorge V. Neville-Neil m->m_nextpkt = NULL; 7894857f5fbSGeorge V. Neville-Neil 7906cb52192SRobert Watson /* 7916cb52192SRobert Watson * We will rely on rcvif being set properly in the deferred context, 7926cb52192SRobert Watson * so assert it is correct here. 7936cb52192SRobert Watson */ 794e84ef07fSBjoern A. Zeeb KASSERT(m->m_pkthdr.rcvif == ifp, ("%s: ifnet mismatch m %p " 795e84ef07fSBjoern A. Zeeb "rcvif %p ifp %p", __func__, m, m->m_pkthdr.rcvif, ifp)); 796484149deSBjoern A. Zeeb CURVNET_SET_QUIET(ifp->if_vnet); 7976cb52192SRobert Watson netisr_dispatch(NETISR_ETHER, m); 798484149deSBjoern A. Zeeb CURVNET_RESTORE(); 7994857f5fbSGeorge V. Neville-Neil m = mn; 8004857f5fbSGeorge V. Neville-Neil } 8016cb52192SRobert Watson } 8026cb52192SRobert Watson 8036cb52192SRobert Watson /* 804e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 805e1e1452dSArchie Cobbs */ 806e1e1452dSArchie Cobbs void 807c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 808e1e1452dSArchie Cobbs { 809c1d93b05SSam Leffler struct ether_header *eh; 8107d4317bdSAlexander V. Chernikov int i, isr; 811e1e1452dSArchie Cobbs u_short ether_type; 81269462a82SBruce M Simpson 81369462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 81469462a82SBruce M Simpson 8157d4317bdSAlexander V. Chernikov /* Do not grab PROMISC frames in case we are re-entered. */ 816b252313fSGleb Smirnoff if (PFIL_HOOKED_IN(V_link_pfil_head) && !(m->m_flags & M_PROMISC)) { 817b252313fSGleb Smirnoff i = pfil_run_hooks(V_link_pfil_head, &m, ifp, PFIL_IN, NULL); 8187d4317bdSAlexander V. Chernikov if (i != 0 || m == NULL) 8197d4317bdSAlexander V. Chernikov return; 82069462a82SBruce M Simpson } 8217d4317bdSAlexander V. Chernikov 822c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 823cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 824c1d93b05SSam Leffler 825a9771948SGleb Smirnoff /* 82669462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 82769462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 828a9771948SGleb Smirnoff */ 82969462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 83069462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 83175ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 8323751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_NOPROTO, 1); 8336c23e6ccSRuslan Ermilov m_freem(m); 8346c23e6ccSRuslan Ermilov return; 8356c23e6ccSRuslan Ermilov } 83669462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 83769462a82SBruce M Simpson __func__)); 83869462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 83969462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 840c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 841c1d93b05SSam Leffler return; 842c1d93b05SSam Leffler } 843c1d93b05SSam Leffler 844c1d93b05SSam Leffler /* 84569462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 84669462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 847c1d93b05SSam Leffler */ 84869462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 849c1d93b05SSam Leffler m_freem(m); 850c1d93b05SSam Leffler return; 851c1d93b05SSam Leffler } 852c1d93b05SSam Leffler 85369462a82SBruce M Simpson /* 85469462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 85569462a82SBruce M Simpson * Strip off Ethernet header. 85669462a82SBruce M Simpson */ 85769462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 85886bd0491SAndre Oppermann m_clrprotoflags(m); 859797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 860c1d93b05SSam Leffler 86169462a82SBruce M Simpson /* 86269462a82SBruce M Simpson * Dispatch frame to upper layer. 86369462a82SBruce M Simpson */ 864307d80beSDavid Greenman switch (ether_type) { 865df8bae1dSRodney W. Grimes #ifdef INET 866df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 8671cafed39SJonathan Lemon isr = NETISR_IP; 868df8bae1dSRodney W. Grimes break; 869df8bae1dSRodney W. Grimes 870df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 87108aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 87208aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 87308aadfbbSJonathan Lemon m_freem(m); 87408aadfbbSJonathan Lemon return; 87508aadfbbSJonathan Lemon } 8761cafed39SJonathan Lemon isr = NETISR_ARP; 877df8bae1dSRodney W. Grimes break; 878df8bae1dSRodney W. Grimes #endif 87982cd038dSYoshinobu Inoue #ifdef INET6 88082cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 8811cafed39SJonathan Lemon isr = NETISR_IPV6; 88282cd038dSYoshinobu Inoue break; 88382cd038dSYoshinobu Inoue #endif 884df8bae1dSRodney W. Grimes default: 8851cafed39SJonathan Lemon goto discard; 886df8bae1dSRodney W. Grimes } 8871cafed39SJonathan Lemon netisr_dispatch(isr, m); 888c1d93b05SSam Leffler return; 8891cafed39SJonathan Lemon 890c1d93b05SSam Leffler discard: 891c1d93b05SSam Leffler /* 892c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 893c1d93b05SSam Leffler * hand the packet to it for last chance processing; 894c1d93b05SSam Leffler * otherwise dispose of it. 895c1d93b05SSam Leffler */ 896833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 897514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 898514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 899c1d93b05SSam Leffler /* 900c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 901c1d93b05SSam Leffler * consistent view of inbound packets. 902c1d93b05SSam Leffler */ 903eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_HDR_LEN, M_NOWAIT); 904c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 905c1d93b05SSam Leffler return; 906c1d93b05SSam Leffler } 907c1d93b05SSam Leffler m_freem(m); 908c1d93b05SSam Leffler } 909c1d93b05SSam Leffler 910c1d93b05SSam Leffler /* 911c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 912c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 913c1d93b05SSam Leffler * 914c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 915c1d93b05SSam Leffler * 916c1d93b05SSam Leffler * since there's no static buffer involved. 917c1d93b05SSam Leffler */ 918c1d93b05SSam Leffler char * 919c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 920c1d93b05SSam Leffler { 921c1d93b05SSam Leffler static char etherbuf[18]; 922c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 923c1d93b05SSam Leffler return (etherbuf); 924df8bae1dSRodney W. Grimes } 925df8bae1dSRodney W. Grimes 926df8bae1dSRodney W. Grimes /* 927df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 928df8bae1dSRodney W. Grimes */ 929df8bae1dSRodney W. Grimes void 930d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 931df8bae1dSRodney W. Grimes { 932f93dfa28SBrooks Davis int i; 933098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 934098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 935df8bae1dSRodney W. Grimes 936c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 937c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 938cfeff1b6SJonathan Lemon if_attach(ifp); 939df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 940c1d93b05SSam Leffler ifp->if_output = ether_output; 941c1d93b05SSam Leffler ifp->if_input = ether_input; 9421158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 9434fb3a820SAlexander V. Chernikov ifp->if_requestencap = ether_requestencap; 944d3c351c5SMarko Zec #ifdef VIMAGE 945d3c351c5SMarko Zec ifp->if_reassign = ether_reassign; 946d3c351c5SMarko Zec #endif 947a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 948c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 949322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 950c1d93b05SSam Leffler 9514a0d6638SRuslan Ermilov ifa = ifp->if_addr; 9526e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 95359562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 954df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 955df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 956d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 957c1d93b05SSam Leffler 9585b1a5e45SRavi Pokala if (ifp->if_hw_addr != NULL) 959ddae5750SRavi Pokala bcopy(lla, ifp->if_hw_addr, ifp->if_addrlen); 960ddae5750SRavi Pokala 961797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 962e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 963e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 964e3bbbec2SMatthew N. Dodd 965f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 966f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 967d09ed26fSRuslan Ermilov if (lla[i] != 0) 968f93dfa28SBrooks Davis break; 969f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 970d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 971ef1f9169SMarcel Moolenaar 972ef1f9169SMarcel Moolenaar uuid_ether_add(LLADDR(sdl)); 9738819ad85SSepherosa Ziehau 9748819ad85SSepherosa Ziehau /* Add necessary bits are setup; announce it now. */ 9758819ad85SSepherosa Ziehau EVENTHANDLER_INVOKE(ether_ifattach_event, ifp); 9768819ad85SSepherosa Ziehau if (IS_DEFAULT_VNET(curvnet)) 9778819ad85SSepherosa Ziehau devctl_notify("ETHERNET", ifp->if_xname, "IFATTACH", NULL); 978e1e1452dSArchie Cobbs } 979e1e1452dSArchie Cobbs 98021b8ebd9SArchie Cobbs /* 98121b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 98221b8ebd9SArchie Cobbs */ 98321b8ebd9SArchie Cobbs void 984c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 98521b8ebd9SArchie Cobbs { 986ef1f9169SMarcel Moolenaar struct sockaddr_dl *sdl; 987ef1f9169SMarcel Moolenaar 988ef1f9169SMarcel Moolenaar sdl = (struct sockaddr_dl *)(ifp->if_addr->ifa_addr); 989ef1f9169SMarcel Moolenaar uuid_ether_del(LLADDR(sdl)); 990ef1f9169SMarcel Moolenaar 991833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 992514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 993514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 99421b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 995514bcb89SPoul-Henning Kamp } 99620a65f37SAndrew Thompson 99721b8ebd9SArchie Cobbs bpfdetach(ifp); 99821b8ebd9SArchie Cobbs if_detach(ifp); 99921b8ebd9SArchie Cobbs } 100021b8ebd9SArchie Cobbs 1001d3c351c5SMarko Zec #ifdef VIMAGE 1002d3c351c5SMarko Zec void 1003d3c351c5SMarko Zec ether_reassign(struct ifnet *ifp, struct vnet *new_vnet, char *unused __unused) 1004d3c351c5SMarko Zec { 1005d3c351c5SMarko Zec 1006833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 1007d3c351c5SMarko Zec KASSERT(ng_ether_detach_p != NULL, 1008d3c351c5SMarko Zec ("ng_ether_detach_p is NULL")); 1009d3c351c5SMarko Zec (*ng_ether_detach_p)(ifp); 1010d3c351c5SMarko Zec } 1011d3c351c5SMarko Zec 1012d3c351c5SMarko Zec if (ng_ether_attach_p != NULL) { 1013d3c351c5SMarko Zec CURVNET_SET_QUIET(new_vnet); 1014d3c351c5SMarko Zec (*ng_ether_attach_p)(ifp); 1015d3c351c5SMarko Zec CURVNET_RESTORE(); 1016d3c351c5SMarko Zec } 1017d3c351c5SMarko Zec } 1018d3c351c5SMarko Zec #endif 1019d3c351c5SMarko Zec 1020ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 1021602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 102230106f6aSPoul-Henning Kamp 102316b4a343SChristian Weisgerber #if 0 102416b4a343SChristian Weisgerber /* 102516b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 102616b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 102716b4a343SChristian Weisgerber * than the double-loop. 102816b4a343SChristian Weisgerber */ 102916b4a343SChristian Weisgerber uint32_t 103016b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 103116b4a343SChristian Weisgerber { 103216b4a343SChristian Weisgerber size_t i; 103316b4a343SChristian Weisgerber uint32_t crc; 103416b4a343SChristian Weisgerber int bit; 103516b4a343SChristian Weisgerber uint8_t data; 103616b4a343SChristian Weisgerber 103716b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 103816b4a343SChristian Weisgerber 103916b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 1040933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 104116b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 104216b4a343SChristian Weisgerber crc >>= 1; 104316b4a343SChristian Weisgerber if (carry) 104416b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 104516b4a343SChristian Weisgerber } 1046933dad75SAntoine Brodin } 104716b4a343SChristian Weisgerber 104816b4a343SChristian Weisgerber return (crc); 104916b4a343SChristian Weisgerber } 105016b4a343SChristian Weisgerber #else 105116b4a343SChristian Weisgerber uint32_t 105216b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 105316b4a343SChristian Weisgerber { 105416b4a343SChristian Weisgerber static const uint32_t crctab[] = { 105516b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 105616b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 105716b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 105816b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 105916b4a343SChristian Weisgerber }; 106016b4a343SChristian Weisgerber size_t i; 106116b4a343SChristian Weisgerber uint32_t crc; 106216b4a343SChristian Weisgerber 106316b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 106416b4a343SChristian Weisgerber 106516b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 106616b4a343SChristian Weisgerber crc ^= buf[i]; 106716b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 106816b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 106916b4a343SChristian Weisgerber } 107016b4a343SChristian Weisgerber 107116b4a343SChristian Weisgerber return (crc); 107216b4a343SChristian Weisgerber } 107316b4a343SChristian Weisgerber #endif 107416b4a343SChristian Weisgerber 107516b4a343SChristian Weisgerber uint32_t 107616b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 107716b4a343SChristian Weisgerber { 107816b4a343SChristian Weisgerber size_t i; 107916b4a343SChristian Weisgerber uint32_t crc, carry; 108016b4a343SChristian Weisgerber int bit; 108116b4a343SChristian Weisgerber uint8_t data; 108216b4a343SChristian Weisgerber 108316b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 108416b4a343SChristian Weisgerber 108516b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 108616b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 108716b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 108816b4a343SChristian Weisgerber crc <<= 1; 108916b4a343SChristian Weisgerber if (carry) 109016b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 109116b4a343SChristian Weisgerber } 109216b4a343SChristian Weisgerber } 109316b4a343SChristian Weisgerber 109416b4a343SChristian Weisgerber return (crc); 109516b4a343SChristian Weisgerber } 109616b4a343SChristian Weisgerber 1097fb583156SDavid Greenman int 1098995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 109930106f6aSPoul-Henning Kamp { 110030106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 110130106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 1102fb583156SDavid Greenman int error = 0; 110330106f6aSPoul-Henning Kamp 110430106f6aSPoul-Henning Kamp switch (command) { 110530106f6aSPoul-Henning Kamp case SIOCSIFADDR: 110630106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 110730106f6aSPoul-Henning Kamp 110830106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 110930106f6aSPoul-Henning Kamp #ifdef INET 111030106f6aSPoul-Henning Kamp case AF_INET: 111130106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1112322dcb8dSMax Khon arp_ifinit(ifp, ifa); 111330106f6aSPoul-Henning Kamp break; 111430106f6aSPoul-Henning Kamp #endif 111530106f6aSPoul-Henning Kamp default: 111630106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 111730106f6aSPoul-Henning Kamp break; 111830106f6aSPoul-Henning Kamp } 111930106f6aSPoul-Henning Kamp break; 112030106f6aSPoul-Henning Kamp 112130106f6aSPoul-Henning Kamp case SIOCGIFADDR: 112238d958a6SBrooks Davis bcopy(IF_LLADDR(ifp), &ifr->ifr_addr.sa_data[0], 112338d958a6SBrooks Davis ETHER_ADDR_LEN); 112430106f6aSPoul-Henning Kamp break; 1125fb583156SDavid Greenman 1126fb583156SDavid Greenman case SIOCSIFMTU: 1127fb583156SDavid Greenman /* 1128fb583156SDavid Greenman * Set the interface MTU. 1129fb583156SDavid Greenman */ 1130fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1131fb583156SDavid Greenman error = EINVAL; 1132fb583156SDavid Greenman } else { 1133fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 113430106f6aSPoul-Henning Kamp } 1135fb583156SDavid Greenman break; 1136f1379734SKonstantin Belousov 1137f1379734SKonstantin Belousov case SIOCSLANPCP: 1138f1379734SKonstantin Belousov error = priv_check(curthread, PRIV_NET_SETLANPCP); 1139f1379734SKonstantin Belousov if (error != 0) 1140f1379734SKonstantin Belousov break; 1141f1379734SKonstantin Belousov if (ifr->ifr_lan_pcp > 7 && 11424a381a9eSHans Petter Selasky ifr->ifr_lan_pcp != IFNET_PCP_NONE) { 1143f1379734SKonstantin Belousov error = EINVAL; 11444a381a9eSHans Petter Selasky } else { 1145f1379734SKonstantin Belousov ifp->if_pcp = ifr->ifr_lan_pcp; 11464a381a9eSHans Petter Selasky /* broadcast event about PCP change */ 11474a381a9eSHans Petter Selasky EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_PCP); 11484a381a9eSHans Petter Selasky } 1149f1379734SKonstantin Belousov break; 1150f1379734SKonstantin Belousov 1151f1379734SKonstantin Belousov case SIOCGLANPCP: 1152f1379734SKonstantin Belousov ifr->ifr_lan_pcp = ifp->if_pcp; 1153f1379734SKonstantin Belousov break; 1154f1379734SKonstantin Belousov 1155c1d93b05SSam Leffler default: 1156c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1157c1d93b05SSam Leffler break; 1158fb583156SDavid Greenman } 1159fb583156SDavid Greenman return (error); 116030106f6aSPoul-Henning Kamp } 11611158dfb7SGarrett Wollman 116237c84183SPoul-Henning Kamp static int 116372fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 116472fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 11651158dfb7SGarrett Wollman { 11661158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1167d7647d96SDag-Erling Smørgrav #ifdef INET 11681158dfb7SGarrett Wollman struct sockaddr_in *sin; 1169d7647d96SDag-Erling Smørgrav #endif 117082cd038dSYoshinobu Inoue #ifdef INET6 117182cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 117282cd038dSYoshinobu Inoue #endif 11731158dfb7SGarrett Wollman u_char *e_addr; 11741158dfb7SGarrett Wollman 11751158dfb7SGarrett Wollman switch(sa->sa_family) { 11761158dfb7SGarrett Wollman case AF_LINK: 11777f33a738SJulian Elischer /* 11787f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 11797f33a738SJulian Elischer */ 11801158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 11811158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1182086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 11831158dfb7SGarrett Wollman return EADDRNOTAVAIL; 1184155d72c4SPedro F. Giffuni *llsa = NULL; 11851158dfb7SGarrett Wollman return 0; 11861158dfb7SGarrett Wollman 11871158dfb7SGarrett Wollman #ifdef INET 11881158dfb7SGarrett Wollman case AF_INET: 11891158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 11901158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 11911158dfb7SGarrett Wollman return EADDRNOTAVAIL; 119295fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 11931158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 11941158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 11951158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 11961158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 11971158dfb7SGarrett Wollman return 0; 11981158dfb7SGarrett Wollman #endif 119982cd038dSYoshinobu Inoue #ifdef INET6 120082cd038dSYoshinobu Inoue case AF_INET6: 120182cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1202595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1203595b8a1cSJun-ichiro itojun Hagino /* 1204595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1205595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1206595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1207595b8a1cSJun-ichiro itojun Hagino */ 1208595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1209155d72c4SPedro F. Giffuni *llsa = NULL; 1210595b8a1cSJun-ichiro itojun Hagino return 0; 1211595b8a1cSJun-ichiro itojun Hagino } 121282cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 121382cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 121495fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 121582cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 121682cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 121782cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 121882cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 121982cd038dSYoshinobu Inoue return 0; 122082cd038dSYoshinobu Inoue #endif 12211158dfb7SGarrett Wollman 12221158dfb7SGarrett Wollman default: 12231158dfb7SGarrett Wollman /* 12241158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 12251158dfb7SGarrett Wollman * that counts... 12261158dfb7SGarrett Wollman */ 12271158dfb7SGarrett Wollman return EAFNOSUPPORT; 12281158dfb7SGarrett Wollman } 12291158dfb7SGarrett Wollman } 123040811c14SMatthew N. Dodd 123140811c14SMatthew N. Dodd static moduledata_t ether_mod = { 1232833e8dc5SGleb Smirnoff .name = "ether", 123340811c14SMatthew N. Dodd }; 123440811c14SMatthew N. Dodd 123552f1277eSChristian S.J. Peron void 123652f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 123752f1277eSChristian S.J. Peron { 123852f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 123952f1277eSChristian S.J. Peron struct mbuf mv, mb; 124052f1277eSChristian S.J. Peron 124152f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 124252f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 124352f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 124452f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 124552f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 124652f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 124752f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 124852f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 124952f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 125052f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 125152f1277eSChristian S.J. Peron /* 125252f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 125352f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 125452f1277eSChristian S.J. Peron * 125552f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 125652f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 125752f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 125852f1277eSChristian S.J. Peron * 125952f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 126052f1277eSChristian S.J. Peron */ 126152f1277eSChristian S.J. Peron if (data != NULL) { 126252f1277eSChristian S.J. Peron mv.m_next = m; 126352f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 126452f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 126552f1277eSChristian S.J. Peron mb.m_next = &mv; 126652f1277eSChristian S.J. Peron mb.m_data = data; 126752f1277eSChristian S.J. Peron mb.m_len = dlen; 126852f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 126952f1277eSChristian S.J. Peron } else 127052f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 127152f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 127252f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 127352f1277eSChristian S.J. Peron } 127452f1277eSChristian S.J. Peron 127560e87ca8SAndrew Thompson struct mbuf * 1276a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 127760e87ca8SAndrew Thompson { 127860e87ca8SAndrew Thompson struct ether_vlan_header *evl; 127960e87ca8SAndrew Thompson 1280eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_NOWAIT); 128160e87ca8SAndrew Thompson if (m == NULL) 128260e87ca8SAndrew Thompson return (NULL); 128360e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 128460e87ca8SAndrew Thompson 128560e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 128660e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 128760e87ca8SAndrew Thompson if (m == NULL) 128860e87ca8SAndrew Thompson return (NULL); 128960e87ca8SAndrew Thompson } 129060e87ca8SAndrew Thompson 129160e87ca8SAndrew Thompson /* 129260e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 129360e87ca8SAndrew Thompson * with 802.1Q encapsulation. 129460e87ca8SAndrew Thompson */ 129560e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 129660e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 129760e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 129860e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 129960e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 130060e87ca8SAndrew Thompson return (m); 130160e87ca8SAndrew Thompson } 130260e87ca8SAndrew Thompson 1303f1379734SKonstantin Belousov static SYSCTL_NODE(_net_link, IFT_L2VLAN, vlan, CTLFLAG_RW, 0, 1304f1379734SKonstantin Belousov "IEEE 802.1Q VLAN"); 1305f1379734SKonstantin Belousov static SYSCTL_NODE(_net_link_vlan, PF_LINK, link, CTLFLAG_RW, 0, 1306f1379734SKonstantin Belousov "for consistency"); 1307f1379734SKonstantin Belousov 13085f901c92SAndrew Turner VNET_DEFINE_STATIC(int, soft_pad); 1309f1379734SKonstantin Belousov #define V_soft_pad VNET(soft_pad) 1310f1379734SKonstantin Belousov SYSCTL_INT(_net_link_vlan, OID_AUTO, soft_pad, CTLFLAG_RW | CTLFLAG_VNET, 1311f1379734SKonstantin Belousov &VNET_NAME(soft_pad), 0, 1312f1379734SKonstantin Belousov "pad short frames before tagging"); 1313f1379734SKonstantin Belousov 1314f1379734SKonstantin Belousov /* 1315f1379734SKonstantin Belousov * For now, make preserving PCP via an mbuf tag optional, as it increases 1316f1379734SKonstantin Belousov * per-packet memory allocations and frees. In the future, it would be 1317f1379734SKonstantin Belousov * preferable to reuse ether_vtag for this, or similar. 1318f1379734SKonstantin Belousov */ 1319f1379734SKonstantin Belousov int vlan_mtag_pcp = 0; 1320f1379734SKonstantin Belousov SYSCTL_INT(_net_link_vlan, OID_AUTO, mtag_pcp, CTLFLAG_RW, 1321f1379734SKonstantin Belousov &vlan_mtag_pcp, 0, 1322f1379734SKonstantin Belousov "Retain VLAN PCP information as packets are passed up the stack"); 1323f1379734SKonstantin Belousov 1324f1379734SKonstantin Belousov bool 1325f1379734SKonstantin Belousov ether_8021q_frame(struct mbuf **mp, struct ifnet *ife, struct ifnet *p, 1326f1379734SKonstantin Belousov uint16_t vid, uint8_t pcp) 1327f1379734SKonstantin Belousov { 1328f1379734SKonstantin Belousov struct m_tag *mtag; 1329f1379734SKonstantin Belousov int n; 1330f1379734SKonstantin Belousov uint16_t tag; 1331f1379734SKonstantin Belousov static const char pad[8]; /* just zeros */ 1332f1379734SKonstantin Belousov 1333f1379734SKonstantin Belousov /* 1334f1379734SKonstantin Belousov * Pad the frame to the minimum size allowed if told to. 1335f1379734SKonstantin Belousov * This option is in accord with IEEE Std 802.1Q, 2003 Ed., 1336f1379734SKonstantin Belousov * paragraph C.4.4.3.b. It can help to work around buggy 1337f1379734SKonstantin Belousov * bridges that violate paragraph C.4.4.3.a from the same 1338f1379734SKonstantin Belousov * document, i.e., fail to pad short frames after untagging. 1339f1379734SKonstantin Belousov * E.g., a tagged frame 66 bytes long (incl. FCS) is OK, but 1340f1379734SKonstantin Belousov * untagging it will produce a 62-byte frame, which is a runt 1341f1379734SKonstantin Belousov * and requires padding. There are VLAN-enabled network 1342f1379734SKonstantin Belousov * devices that just discard such runts instead or mishandle 1343f1379734SKonstantin Belousov * them somehow. 1344f1379734SKonstantin Belousov */ 1345f1379734SKonstantin Belousov if (V_soft_pad && p->if_type == IFT_ETHER) { 1346f1379734SKonstantin Belousov for (n = ETHERMIN + ETHER_HDR_LEN - (*mp)->m_pkthdr.len; 1347f1379734SKonstantin Belousov n > 0; n -= sizeof(pad)) { 1348f1379734SKonstantin Belousov if (!m_append(*mp, min(n, sizeof(pad)), pad)) 1349f1379734SKonstantin Belousov break; 1350f1379734SKonstantin Belousov } 1351f1379734SKonstantin Belousov if (n > 0) { 1352f1379734SKonstantin Belousov m_freem(*mp); 1353f1379734SKonstantin Belousov *mp = NULL; 1354f1379734SKonstantin Belousov if_printf(ife, "cannot pad short frame"); 1355f1379734SKonstantin Belousov return (false); 1356f1379734SKonstantin Belousov } 1357f1379734SKonstantin Belousov } 1358f1379734SKonstantin Belousov 1359f1379734SKonstantin Belousov /* 1360f1379734SKonstantin Belousov * If underlying interface can do VLAN tag insertion itself, 1361f1379734SKonstantin Belousov * just pass the packet along. However, we need some way to 1362f1379734SKonstantin Belousov * tell the interface where the packet came from so that it 1363f1379734SKonstantin Belousov * knows how to find the VLAN tag to use, so we attach a 1364f1379734SKonstantin Belousov * packet tag that holds it. 1365f1379734SKonstantin Belousov */ 1366f1379734SKonstantin Belousov if (vlan_mtag_pcp && (mtag = m_tag_locate(*mp, MTAG_8021Q, 1367f1379734SKonstantin Belousov MTAG_8021Q_PCP_OUT, NULL)) != NULL) 1368f1379734SKonstantin Belousov tag = EVL_MAKETAG(vid, *(uint8_t *)(mtag + 1), 0); 1369f1379734SKonstantin Belousov else 1370f1379734SKonstantin Belousov tag = EVL_MAKETAG(vid, pcp, 0); 1371f1379734SKonstantin Belousov if (p->if_capenable & IFCAP_VLAN_HWTAGGING) { 1372f1379734SKonstantin Belousov (*mp)->m_pkthdr.ether_vtag = tag; 1373f1379734SKonstantin Belousov (*mp)->m_flags |= M_VLANTAG; 1374f1379734SKonstantin Belousov } else { 1375f1379734SKonstantin Belousov *mp = ether_vlanencap(*mp, tag); 1376f1379734SKonstantin Belousov if (*mp == NULL) { 1377f1379734SKonstantin Belousov if_printf(ife, "unable to prepend 802.1Q header"); 1378f1379734SKonstantin Belousov return (false); 1379f1379734SKonstantin Belousov } 1380f1379734SKonstantin Belousov } 1381f1379734SKonstantin Belousov return (true); 1382f1379734SKonstantin Belousov } 1383f1379734SKonstantin Belousov 1384fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 138540811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1386