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> 5010b1fde0SMark Murray #include <sys/random.h> 51df8bae1dSRodney W. Grimes #include <sys/socket.h> 5251a53488SBruce Evans #include <sys/sockio.h> 53602d513cSGarrett Wollman #include <sys/sysctl.h> 54ef1f9169SMarcel Moolenaar #include <sys/uuid.h> 55df8bae1dSRodney W. Grimes 56df8bae1dSRodney W. Grimes #include <net/if.h> 5776039bc8SGleb Smirnoff #include <net/if_var.h> 58d7647d96SDag-Erling Smørgrav #include <net/if_arp.h> 59df8bae1dSRodney W. Grimes #include <net/netisr.h> 60df8bae1dSRodney W. Grimes #include <net/route.h> 61df8bae1dSRodney W. Grimes #include <net/if_llc.h> 62df8bae1dSRodney W. Grimes #include <net/if_dl.h> 63df8bae1dSRodney W. Grimes #include <net/if_types.h> 642e2de7f2SArchie Cobbs #include <net/bpf.h> 65e1e1452dSArchie Cobbs #include <net/ethernet.h> 66fd6238a6SAndrew Thompson #include <net/if_bridgevar.h> 67c1d93b05SSam Leffler #include <net/if_vlan_var.h> 686e6b3f7cSQing Li #include <net/if_llatbl.h> 697d4317bdSAlexander V. Chernikov #include <net/pfil.h> 70b2bdc62aSAdrian Chadd #include <net/rss_config.h> 714b79449eSBjoern A. Zeeb #include <net/vnet.h> 72df8bae1dSRodney W. Grimes 7375bf2db3SGleb Smirnoff #include <netpfil/pf/pf_mtag.h> 7475bf2db3SGleb Smirnoff 7582cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 76df8bae1dSRodney W. Grimes #include <netinet/in.h> 77df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 78df8bae1dSRodney W. Grimes #include <netinet/if_ether.h> 7954bfbd51SWill Andrews #include <netinet/ip_carp.h> 800bcfa8e4SLuigi Rizzo #include <netinet/ip_var.h> 811d5e9e22SEivind Eklund #endif 8282cd038dSYoshinobu Inoue #ifdef INET6 8382cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 8482cd038dSYoshinobu Inoue #endif 85aed55708SRobert Watson #include <security/mac/mac_framework.h> 86aed55708SRobert Watson 87d54d93acSEd Maste #ifdef CTASSERT 88d54d93acSEd Maste CTASSERT(sizeof (struct ether_header) == ETHER_ADDR_LEN * 2 + 2); 89d54d93acSEd Maste CTASSERT(sizeof (struct ether_addr) == ETHER_ADDR_LEN); 90d54d93acSEd Maste #endif 91d54d93acSEd Maste 927d4317bdSAlexander V. Chernikov VNET_DEFINE(struct pfil_head, link_pfil_hook); /* Packet filter hooks */ 937d4317bdSAlexander V. Chernikov 94e1e1452dSArchie Cobbs /* netgraph node hooks for ng_ether(4) */ 95c1d93b05SSam Leffler void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 96c1d93b05SSam Leffler void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 97e1e1452dSArchie Cobbs int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 98e1e1452dSArchie Cobbs void (*ng_ether_attach_p)(struct ifnet *ifp); 99e1e1452dSArchie Cobbs void (*ng_ether_detach_p)(struct ifnet *ifp); 100e1e1452dSArchie Cobbs 101824eb9dcSDavid E. O'Brien void (*vlan_input_p)(struct ifnet *, struct mbuf *); 1029d4fe4b2SBrooks Davis 103fd6238a6SAndrew Thompson /* if_bridge(4) support */ 1048f867517SAndrew Thompson struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *); 1058f867517SAndrew Thompson int (*bridge_output_p)(struct ifnet *, struct mbuf *, 1068f867517SAndrew Thompson struct sockaddr *, struct rtentry *); 107c8b01292SAndrew Thompson void (*bridge_dn_p)(struct mbuf *, struct ifnet *); 1088f867517SAndrew Thompson 10918242d3bSAndrew Thompson /* if_lagg(4) support */ 11018242d3bSAndrew Thompson struct mbuf *(*lagg_input_p)(struct ifnet *, struct mbuf *); 111b47888ceSAndrew Thompson 112e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 113868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 114868d8b62SMatthew N. Dodd 115929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 116929ddbbbSAlfred Perlstein struct sockaddr *); 117d3c351c5SMarko Zec #ifdef VIMAGE 118d3c351c5SMarko Zec static void ether_reassign(struct ifnet *, struct vnet *, char *); 119d3c351c5SMarko Zec #endif 1204fb3a820SAlexander V. Chernikov static int ether_requestencap(struct ifnet *, struct if_encap_req *); 121868d8b62SMatthew N. Dodd 12269462a82SBruce M Simpson 1234c8e8c05SJulian Elischer #define senderr(e) do { error = (e); goto bad;} while (0) 124df8bae1dSRodney W. Grimes 12522f8ce43SAlexander V. Chernikov static void 12622f8ce43SAlexander V. Chernikov update_mbuf_csumflags(struct mbuf *src, struct mbuf *dst) 12722f8ce43SAlexander V. Chernikov { 12822f8ce43SAlexander V. Chernikov int csum_flags = 0; 12922f8ce43SAlexander V. Chernikov 13022f8ce43SAlexander V. Chernikov if (src->m_pkthdr.csum_flags & CSUM_IP) 13122f8ce43SAlexander V. Chernikov csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 13222f8ce43SAlexander V. Chernikov if (src->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 13322f8ce43SAlexander V. Chernikov csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 13422f8ce43SAlexander V. Chernikov if (src->m_pkthdr.csum_flags & CSUM_SCTP) 13522f8ce43SAlexander V. Chernikov csum_flags |= CSUM_SCTP_VALID; 13622f8ce43SAlexander V. Chernikov dst->m_pkthdr.csum_flags |= csum_flags; 13722f8ce43SAlexander V. Chernikov if (csum_flags & CSUM_DATA_VALID) 13822f8ce43SAlexander V. Chernikov dst->m_pkthdr.csum_data = 0xffff; 13922f8ce43SAlexander V. Chernikov } 14022f8ce43SAlexander V. Chernikov 141df8bae1dSRodney W. Grimes /* 1424fb3a820SAlexander V. Chernikov * Handle link-layer encapsulation requests. 1434fb3a820SAlexander V. Chernikov */ 1444fb3a820SAlexander V. Chernikov static int 1454fb3a820SAlexander V. Chernikov ether_requestencap(struct ifnet *ifp, struct if_encap_req *req) 1464fb3a820SAlexander V. Chernikov { 1474fb3a820SAlexander V. Chernikov struct ether_header *eh; 1484fb3a820SAlexander V. Chernikov struct arphdr *ah; 1494fb3a820SAlexander V. Chernikov uint16_t etype; 1504fb3a820SAlexander V. Chernikov const u_char *lladdr; 1514fb3a820SAlexander V. Chernikov 1524fb3a820SAlexander V. Chernikov if (req->rtype != IFENCAP_LL) 1534fb3a820SAlexander V. Chernikov return (EOPNOTSUPP); 1544fb3a820SAlexander V. Chernikov 1554fb3a820SAlexander V. Chernikov if (req->bufsize < ETHER_HDR_LEN) 1564fb3a820SAlexander V. Chernikov return (ENOMEM); 1574fb3a820SAlexander V. Chernikov 1584fb3a820SAlexander V. Chernikov eh = (struct ether_header *)req->buf; 1594fb3a820SAlexander V. Chernikov lladdr = req->lladdr; 1604fb3a820SAlexander V. Chernikov req->lladdr_off = 0; 1614fb3a820SAlexander V. Chernikov 1624fb3a820SAlexander V. Chernikov switch (req->family) { 1634fb3a820SAlexander V. Chernikov case AF_INET: 1644fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_IP); 1654fb3a820SAlexander V. Chernikov break; 1664fb3a820SAlexander V. Chernikov case AF_INET6: 1674fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_IPV6); 1684fb3a820SAlexander V. Chernikov break; 1694fb3a820SAlexander V. Chernikov case AF_ARP: 1704fb3a820SAlexander V. Chernikov ah = (struct arphdr *)req->hdata; 1714fb3a820SAlexander V. Chernikov ah->ar_hrd = htons(ARPHRD_ETHER); 1724fb3a820SAlexander V. Chernikov 1734fb3a820SAlexander V. Chernikov switch(ntohs(ah->ar_op)) { 1744fb3a820SAlexander V. Chernikov case ARPOP_REVREQUEST: 1754fb3a820SAlexander V. Chernikov case ARPOP_REVREPLY: 1764fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_REVARP); 1774fb3a820SAlexander V. Chernikov break; 1784fb3a820SAlexander V. Chernikov case ARPOP_REQUEST: 1794fb3a820SAlexander V. Chernikov case ARPOP_REPLY: 1804fb3a820SAlexander V. Chernikov default: 1814fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_ARP); 1824fb3a820SAlexander V. Chernikov break; 1834fb3a820SAlexander V. Chernikov } 1844fb3a820SAlexander V. Chernikov 1854fb3a820SAlexander V. Chernikov if (req->flags & IFENCAP_FLAG_BROADCAST) 1864fb3a820SAlexander V. Chernikov lladdr = ifp->if_broadcastaddr; 1874fb3a820SAlexander V. Chernikov break; 1884fb3a820SAlexander V. Chernikov default: 1894fb3a820SAlexander V. Chernikov return (EAFNOSUPPORT); 1904fb3a820SAlexander V. Chernikov } 1914fb3a820SAlexander V. Chernikov 1924fb3a820SAlexander V. Chernikov memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 1934fb3a820SAlexander V. Chernikov memcpy(eh->ether_dhost, lladdr, ETHER_ADDR_LEN); 1944fb3a820SAlexander V. Chernikov memcpy(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN); 1954fb3a820SAlexander V. Chernikov req->bufsize = sizeof(struct ether_header); 1964fb3a820SAlexander V. Chernikov 1974fb3a820SAlexander V. Chernikov return (0); 1984fb3a820SAlexander V. Chernikov } 1994fb3a820SAlexander V. Chernikov 2004fb3a820SAlexander V. Chernikov 2014fb3a820SAlexander V. Chernikov static int 2024fb3a820SAlexander V. Chernikov ether_resolve_addr(struct ifnet *ifp, struct mbuf *m, 2034fb3a820SAlexander V. Chernikov const struct sockaddr *dst, struct route *ro, u_char *phdr, 2046d768226SGeorge V. Neville-Neil uint32_t *pflags, struct llentry **plle) 2054fb3a820SAlexander V. Chernikov { 2064fb3a820SAlexander V. Chernikov struct ether_header *eh; 2074fb3a820SAlexander V. Chernikov uint32_t lleflags = 0; 2084fb3a820SAlexander V. Chernikov int error = 0; 2094fb3a820SAlexander V. Chernikov #if defined(INET) || defined(INET6) 2104fb3a820SAlexander V. Chernikov uint16_t etype; 2114fb3a820SAlexander V. Chernikov #endif 2124fb3a820SAlexander V. Chernikov 2136d768226SGeorge V. Neville-Neil if (plle) 2146d768226SGeorge V. Neville-Neil *plle = NULL; 2154fb3a820SAlexander V. Chernikov eh = (struct ether_header *)phdr; 2164fb3a820SAlexander V. Chernikov 2174fb3a820SAlexander V. Chernikov switch (dst->sa_family) { 2184fb3a820SAlexander V. Chernikov #ifdef INET 2194fb3a820SAlexander V. Chernikov case AF_INET: 2204fb3a820SAlexander V. Chernikov if ((m->m_flags & (M_BCAST | M_MCAST)) == 0) 2216d768226SGeorge V. Neville-Neil error = arpresolve(ifp, 0, m, dst, phdr, &lleflags, 2226d768226SGeorge V. Neville-Neil plle); 2234fb3a820SAlexander V. Chernikov else { 2244fb3a820SAlexander V. Chernikov if (m->m_flags & M_BCAST) 2254fb3a820SAlexander V. Chernikov memcpy(eh->ether_dhost, ifp->if_broadcastaddr, 2264fb3a820SAlexander V. Chernikov ETHER_ADDR_LEN); 2274fb3a820SAlexander V. Chernikov else { 2284fb3a820SAlexander V. Chernikov const struct in_addr *a; 2294fb3a820SAlexander V. Chernikov a = &(((const struct sockaddr_in *)dst)->sin_addr); 2304fb3a820SAlexander V. Chernikov ETHER_MAP_IP_MULTICAST(a, eh->ether_dhost); 2314fb3a820SAlexander V. Chernikov } 2324fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_IP); 2334fb3a820SAlexander V. Chernikov memcpy(&eh->ether_type, &etype, sizeof(etype)); 2344fb3a820SAlexander V. Chernikov memcpy(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN); 2354fb3a820SAlexander V. Chernikov } 2364fb3a820SAlexander V. Chernikov break; 2374fb3a820SAlexander V. Chernikov #endif 2384fb3a820SAlexander V. Chernikov #ifdef INET6 2394fb3a820SAlexander V. Chernikov case AF_INET6: 2404fb3a820SAlexander V. Chernikov if ((m->m_flags & M_MCAST) == 0) 2416d768226SGeorge V. Neville-Neil error = nd6_resolve(ifp, 0, m, dst, phdr, &lleflags, 2426d768226SGeorge V. Neville-Neil plle); 2434fb3a820SAlexander V. Chernikov else { 2444fb3a820SAlexander V. Chernikov const struct in6_addr *a6; 2454fb3a820SAlexander V. Chernikov a6 = &(((const struct sockaddr_in6 *)dst)->sin6_addr); 2464fb3a820SAlexander V. Chernikov ETHER_MAP_IPV6_MULTICAST(a6, eh->ether_dhost); 2474fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_IPV6); 2484fb3a820SAlexander V. Chernikov memcpy(&eh->ether_type, &etype, sizeof(etype)); 2494fb3a820SAlexander V. Chernikov memcpy(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN); 2504fb3a820SAlexander V. Chernikov } 2514fb3a820SAlexander V. Chernikov break; 2524fb3a820SAlexander V. Chernikov #endif 2534fb3a820SAlexander V. Chernikov default: 2544fb3a820SAlexander V. Chernikov if_printf(ifp, "can't handle af%d\n", dst->sa_family); 2554fb3a820SAlexander V. Chernikov if (m != NULL) 2564fb3a820SAlexander V. Chernikov m_freem(m); 2574fb3a820SAlexander V. Chernikov return (EAFNOSUPPORT); 2584fb3a820SAlexander V. Chernikov } 2594fb3a820SAlexander V. Chernikov 2604fb3a820SAlexander V. Chernikov if (error == EHOSTDOWN) { 26136402a68SAlexander V. Chernikov if (ro != NULL && (ro->ro_flags & RT_HAS_GW) != 0) 2624fb3a820SAlexander V. Chernikov error = EHOSTUNREACH; 2634fb3a820SAlexander V. Chernikov } 2644fb3a820SAlexander V. Chernikov 2654fb3a820SAlexander V. Chernikov if (error != 0) 2664fb3a820SAlexander V. Chernikov return (error); 2674fb3a820SAlexander V. Chernikov 2684fb3a820SAlexander V. Chernikov *pflags = RT_MAY_LOOP; 2694fb3a820SAlexander V. Chernikov if (lleflags & LLE_IFADDR) 2704fb3a820SAlexander V. Chernikov *pflags |= RT_L2_ME; 2714fb3a820SAlexander V. Chernikov 2724fb3a820SAlexander V. Chernikov return (0); 2734fb3a820SAlexander V. Chernikov } 2744fb3a820SAlexander V. Chernikov 2754fb3a820SAlexander V. Chernikov /* 276df8bae1dSRodney W. Grimes * Ethernet output routine. 277df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 278df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 279df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 280df8bae1dSRodney W. Grimes */ 281df8bae1dSRodney W. Grimes int 28272fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 28347e8d432SGleb Smirnoff const struct sockaddr *dst, struct route *ro) 284df8bae1dSRodney W. Grimes { 2854fb3a820SAlexander V. Chernikov int error = 0; 2864fb3a820SAlexander V. Chernikov char linkhdr[ETHER_HDR_LEN], *phdr; 287098a8c3bSMatthew N. Dodd struct ether_header *eh; 28860ee3847SMax Laier struct pf_mtag *t; 289c54c76ccSOleg Bulyzhin int loop_copy = 1; 290d32864c3SRobert Watson int hlen; /* link layer header length */ 2914fb3a820SAlexander V. Chernikov uint32_t pflags; 2926d768226SGeorge V. Neville-Neil struct llentry *lle = NULL; 2936d768226SGeorge V. Neville-Neil int addref = 0; 294df8bae1dSRodney W. Grimes 2954fb3a820SAlexander V. Chernikov phdr = NULL; 2964fb3a820SAlexander V. Chernikov pflags = 0; 297279aa3d4SKip Macy if (ro != NULL) { 2986d768226SGeorge V. Neville-Neil /* XXX BPF uses ro_prepend */ 2996d768226SGeorge V. Neville-Neil if (ro->ro_prepend != NULL) { 3004fb3a820SAlexander V. Chernikov phdr = ro->ro_prepend; 3014fb3a820SAlexander V. Chernikov hlen = ro->ro_plen; 3026d768226SGeorge V. Neville-Neil } else if (!(m->m_flags & (M_BCAST | M_MCAST))) { 3036d768226SGeorge V. Neville-Neil if ((ro->ro_flags & RT_LLE_CACHE) != 0) { 3046d768226SGeorge V. Neville-Neil lle = ro->ro_lle; 3056d768226SGeorge V. Neville-Neil if (lle != NULL && 3066d768226SGeorge V. Neville-Neil (lle->la_flags & LLE_VALID) == 0) { 3076d768226SGeorge V. Neville-Neil LLE_FREE(lle); 3086d768226SGeorge V. Neville-Neil lle = NULL; /* redundant */ 3096d768226SGeorge V. Neville-Neil ro->ro_lle = NULL; 310279aa3d4SKip Macy } 3116d768226SGeorge V. Neville-Neil if (lle == NULL) { 3126d768226SGeorge V. Neville-Neil /* if we lookup, keep cache */ 3136d768226SGeorge V. Neville-Neil addref = 1; 3141435dcd9SAlexander V. Chernikov } else 3151435dcd9SAlexander V. Chernikov /* 3161435dcd9SAlexander V. Chernikov * Notify LLE code that 3171435dcd9SAlexander V. Chernikov * the entry was used 3181435dcd9SAlexander V. Chernikov * by datapath. 3191435dcd9SAlexander V. Chernikov */ 3201435dcd9SAlexander V. Chernikov llentry_mark_used(lle); 3216d768226SGeorge V. Neville-Neil } 3226d768226SGeorge V. Neville-Neil if (lle != NULL) { 3236d768226SGeorge V. Neville-Neil phdr = lle->r_linkdata; 3246d768226SGeorge V. Neville-Neil hlen = lle->r_hdrlen; 3256d768226SGeorge V. Neville-Neil pflags = lle->r_flags; 3266d768226SGeorge V. Neville-Neil } 3276d768226SGeorge V. Neville-Neil } 3286d768226SGeorge V. Neville-Neil } 3296d768226SGeorge V. Neville-Neil 33043b29369SRobert Watson #ifdef MAC 33130d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 33243b29369SRobert Watson if (error) 33343b29369SRobert Watson senderr(error); 33443b29369SRobert Watson #endif 33543b29369SRobert Watson 3366eeac1d9SJulian Elischer M_PROFILE(m); 337afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 338afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 33913f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 34013f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 341df8bae1dSRodney W. Grimes senderr(ENETDOWN); 3427f760c48SMatthew N. Dodd 3434fb3a820SAlexander V. Chernikov if (phdr == NULL) { 3444fb3a820SAlexander V. Chernikov /* No prepend data supplied. Try to calculate ourselves. */ 3454fb3a820SAlexander V. Chernikov phdr = linkhdr; 34684dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 3476d768226SGeorge V. Neville-Neil error = ether_resolve_addr(ifp, m, dst, ro, phdr, &pflags, 3486d768226SGeorge V. Neville-Neil addref ? &lle : NULL); 3496d768226SGeorge V. Neville-Neil if (addref && lle != NULL) 3506d768226SGeorge V. Neville-Neil ro->ro_lle = lle; 3514fb3a820SAlexander V. Chernikov if (error != 0) 352cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 35343a6c75aSMatthew N. Dodd } 35443a6c75aSMatthew N. Dodd 3554fb3a820SAlexander V. Chernikov if ((pflags & RT_L2_ME) != 0) { 35622f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, m); 3576e6b3f7cSQing Li return (if_simloop(ifp, m, dst->sa_family, 0)); 3586e6b3f7cSQing Li } 3594fb3a820SAlexander V. Chernikov loop_copy = pflags & RT_MAY_LOOP; 3606e6b3f7cSQing Li 361df8bae1dSRodney W. Grimes /* 362df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 363df8bae1dSRodney W. Grimes * allocate another. 3646cdb1854SAlexander V. Chernikov * 3656cdb1854SAlexander V. Chernikov * Note that we do prepend regardless of RT_HAS_HEADER flag. 3666cdb1854SAlexander V. Chernikov * This is done because BPF code shifts m_data pointer 3676cdb1854SAlexander V. Chernikov * to the end of ethernet header prior to calling if_output(). 368df8bae1dSRodney W. Grimes */ 3694fb3a820SAlexander V. Chernikov M_PREPEND(m, hlen, M_NOWAIT); 3702166ffe8SRobert Watson if (m == NULL) 371df8bae1dSRodney W. Grimes senderr(ENOBUFS); 3724fb3a820SAlexander V. Chernikov if ((pflags & RT_HAS_HEADER) == 0) { 373df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 3744fb3a820SAlexander V. Chernikov memcpy(eh, phdr, hlen); 375c69aeaadSAlexander V. Chernikov } 376ed7509acSJulian Elischer 377ed7509acSJulian Elischer /* 378ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 379ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 380ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 381ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 382ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 383ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 384ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 385ed7509acSJulian Elischer */ 3864fb3a820SAlexander V. Chernikov if ((m->m_flags & M_BCAST) && loop_copy && (ifp->if_flags & IFF_SIMPLEX) && 38760ee3847SMax Laier ((t = pf_find_mtag(m)) == NULL || !t->routed)) { 38806f684b0SMatthew N. Dodd struct mbuf *n; 389ed7509acSJulian Elischer 390294dd290SLuigi Rizzo /* 391294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 392294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 393294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 394294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 395294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 396294dd290SLuigi Rizzo * extra data copying vs. extra locking). 3979983b3c0SYaroslav Tykhiy * 3989983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 3999983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 4009983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 401294dd290SLuigi Rizzo */ 402eb1b1807SGleb Smirnoff if ((n = m_dup(m, M_NOWAIT)) != NULL) { 40322f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, n); 40406a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 405c1404dc0SArchie Cobbs } else 4063751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 407ed7509acSJulian Elischer } 4082e2de7f2SArchie Cobbs 4093f7d1396SAndrew Thompson /* 4103f7d1396SAndrew Thompson * Bridges require special output handling. 4113f7d1396SAndrew Thompson */ 4123f7d1396SAndrew Thompson if (ifp->if_bridge) { 4133f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 4143f7d1396SAndrew Thompson return (error); 4153f7d1396SAndrew Thompson } 4163f7d1396SAndrew Thompson 417259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 418a9771948SGleb Smirnoff if (ifp->if_carp && 41908b68b0eSGleb Smirnoff (error = (*carp_output_p)(ifp, m, dst))) 420a9771948SGleb Smirnoff goto bad; 421a9771948SGleb Smirnoff #endif 422a9771948SGleb Smirnoff 423e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 424833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 425514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 426514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 427e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 428e1e1452dSArchie Cobbs bad: if (m != NULL) 429e1e1452dSArchie Cobbs m_freem(m); 430e1e1452dSArchie Cobbs return (error); 431e1e1452dSArchie Cobbs } 432e1e1452dSArchie Cobbs if (m == NULL) 433e1e1452dSArchie Cobbs return (0); 434e1e1452dSArchie Cobbs } 435e1e1452dSArchie Cobbs 436e1e1452dSArchie Cobbs /* Continue with link-layer output */ 437e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 438e1e1452dSArchie Cobbs } 439e1e1452dSArchie Cobbs 440e1e1452dSArchie Cobbs /* 441e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 442e1e1452dSArchie Cobbs * 443e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 444e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 445e1e1452dSArchie Cobbs */ 446e1e1452dSArchie Cobbs int 447c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 448e1e1452dSArchie Cobbs { 4497d4317bdSAlexander V. Chernikov int i; 4502b25acc1SLuigi Rizzo 4517d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook)) { 4527d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_OUT, NULL); 4537d4317bdSAlexander V. Chernikov 4547d4317bdSAlexander V. Chernikov if (i != 0) 4557d4317bdSAlexander V. Chernikov return (EACCES); 4567d4317bdSAlexander V. Chernikov 4577d4317bdSAlexander V. Chernikov if (m == NULL) 4587d4317bdSAlexander V. Chernikov return (0); 4594b984093SLuigi Rizzo } 4602b25acc1SLuigi Rizzo 461df8bae1dSRodney W. Grimes /* 462df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 463df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 464df8bae1dSRodney W. Grimes */ 465aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 466df8bae1dSRodney W. Grimes } 467df8bae1dSRodney W. Grimes 4684b984093SLuigi Rizzo /* 469c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 470c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 471df8bae1dSRodney W. Grimes */ 472c1d93b05SSam Leffler static void 4736cb52192SRobert Watson ether_input_internal(struct ifnet *ifp, struct mbuf *m) 474df8bae1dSRodney W. Grimes { 475c1d93b05SSam Leffler struct ether_header *eh; 476c1d93b05SSam Leffler u_short etype; 477df8bae1dSRodney W. Grimes 47869462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 47969462a82SBruce M Simpson m_freem(m); 48069462a82SBruce M Simpson return; 48169462a82SBruce M Simpson } 48269462a82SBruce M Simpson #ifdef DIAGNOSTIC 48369462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 48469462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 48569462a82SBruce M Simpson m_freem(m); 48669462a82SBruce M Simpson return; 48769462a82SBruce M Simpson } 48869462a82SBruce M Simpson #endif 489797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 490c1d93b05SSam Leffler /* XXX maybe should pullup? */ 491c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 492c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 493c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 4943751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 495c1d93b05SSam Leffler m_freem(m); 496c1d93b05SSam Leffler return; 4972e2de7f2SArchie Cobbs } 498c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 499c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 500d1b06863SMark Murray random_harvest_queue(m, sizeof(*m), 2, RANDOM_NET_ETHER); 501d1b06863SMark Murray 50221ca7b57SMarko Zec CURVNET_SET_QUIET(ifp->if_vnet); 50321ca7b57SMarko Zec 50469462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 50569462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 50669462a82SBruce M Simpson m->m_flags |= M_BCAST; 50769462a82SBruce M Simpson else 50869462a82SBruce M Simpson m->m_flags |= M_MCAST; 5093751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1); 51069462a82SBruce M Simpson } 51169462a82SBruce M Simpson 512533d8562SRobert Watson #ifdef MAC 513533d8562SRobert Watson /* 514533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 515533d8562SRobert Watson * consumers can get to it. 516533d8562SRobert Watson */ 51730d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 518533d8562SRobert Watson #endif 519533d8562SRobert Watson 520c1d93b05SSam Leffler /* 52169462a82SBruce M Simpson * Give bpf a chance at the packet. 522c1d93b05SSam Leffler */ 523d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 5242e2de7f2SArchie Cobbs 52569462a82SBruce M Simpson /* 52669462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 52769462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 52869462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 52969462a82SBruce M Simpson */ 530c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 531c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 532c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 533c1d93b05SSam Leffler } 534c1d93b05SSam Leffler 5354cdc1f54SGleb Smirnoff if (!(ifp->if_capenable & IFCAP_HWSTATS)) 5363751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 53705463bb5SDavid Greenman 53869462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 539de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 540de572b37SChristian S.J. Peron m_freem(m); 54121ca7b57SMarko Zec CURVNET_RESTORE(); 542de572b37SChristian S.J. Peron return; 543de572b37SChristian S.J. Peron } 544de572b37SChristian S.J. Peron 54518242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 546b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 54718242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 54818242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 54918242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 550b47888ceSAndrew Thompson if (m != NULL) 551b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 5522db13e75SMarko Zec else { 5532db13e75SMarko Zec CURVNET_RESTORE(); 554b47888ceSAndrew Thompson return; 555b47888ceSAndrew Thompson } 5562db13e75SMarko Zec } 557b47888ceSAndrew Thompson 55869462a82SBruce M Simpson /* 55969462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 56069462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 56169462a82SBruce M Simpson * path correctly. 56269462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 56369462a82SBruce M Simpson */ 56469462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 56569462a82SBruce M Simpson struct ether_vlan_header *evl; 56669462a82SBruce M Simpson 56769462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 56869462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 569402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 57069462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 571402d5e27SBruce M Simpson #endif 5723751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 5732db13e75SMarko Zec CURVNET_RESTORE(); 57469462a82SBruce M Simpson return; 57569462a82SBruce M Simpson } 57669462a82SBruce M Simpson 57769462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 57869462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 57969462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 58069462a82SBruce M Simpson 58169462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 58269462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 58369462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 58497cce87fSGleb Smirnoff eh = mtod(m, struct ether_header *); 58569462a82SBruce M Simpson } 58669462a82SBruce M Simpson 587a34c6aebSBjoern A. Zeeb M_SETFIB(m, ifp->if_fib); 588a34c6aebSBjoern A. Zeeb 58969462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 590833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 591514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 59269462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 59369462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 594c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 59521ca7b57SMarko Zec if (m == NULL) { 59621ca7b57SMarko Zec CURVNET_RESTORE(); 597e1e1452dSArchie Cobbs return; 598e1e1452dSArchie Cobbs } 5995e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 60021ca7b57SMarko Zec } 601e1e1452dSArchie Cobbs 6028f867517SAndrew Thompson /* 60369462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 60469462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 60569462a82SBruce M Simpson * and the frame should be delivered locally. 6068f867517SAndrew Thompson */ 60769462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 60869462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 609fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 61021ca7b57SMarko Zec if (m == NULL) { 61121ca7b57SMarko Zec CURVNET_RESTORE(); 6128f867517SAndrew Thompson return; 6138f867517SAndrew Thompson } 6145e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 61521ca7b57SMarko Zec } 6168f867517SAndrew Thompson 617259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 61869462a82SBruce M Simpson /* 61969462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 62069462a82SBruce M Simpson * mbuf flows up to Layer 3. 62169462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 62269462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 62369462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 62469462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 62569462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 62669462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 62769462a82SBruce M Simpson */ 62854bfbd51SWill Andrews if (ifp->if_carp && (*carp_forus_p)(ifp, eh->ether_dhost)) { 62969462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 63069462a82SBruce M Simpson } else 63169462a82SBruce M Simpson #endif 63269462a82SBruce M Simpson { 63369462a82SBruce M Simpson /* 634e7f8c833SBruce M Simpson * If the frame received was not for our MAC address, set the 63569462a82SBruce M Simpson * M_PROMISC flag on the mbuf chain. The frame may need to 63669462a82SBruce M Simpson * be seen by the rest of the Ethernet input path in case of 63769462a82SBruce M Simpson * re-entry (e.g. bridge, vlan, netgraph) but should not be 63869462a82SBruce M Simpson * seen by upper protocol layers. 63969462a82SBruce M Simpson */ 64069462a82SBruce M Simpson if (!ETHER_IS_MULTICAST(eh->ether_dhost) && 641e7f8c833SBruce M Simpson bcmp(IF_LLADDR(ifp), eh->ether_dhost, ETHER_ADDR_LEN) != 0) 64269462a82SBruce M Simpson m->m_flags |= M_PROMISC; 64369462a82SBruce M Simpson } 64469462a82SBruce M Simpson 645acf032f5SRobert Watson ether_demux(ifp, m); 64621ca7b57SMarko Zec CURVNET_RESTORE(); 647e1e1452dSArchie Cobbs } 648e1e1452dSArchie Cobbs 649e1e1452dSArchie Cobbs /* 6506cb52192SRobert Watson * Ethernet input dispatch; by default, direct dispatch here regardless of 6517527624eSRobert Watson * global configuration. However, if RSS is enabled, hook up RSS affinity 6527527624eSRobert Watson * so that when deferred or hybrid dispatch is enabled, we can redistribute 6537527624eSRobert Watson * load based on RSS. 6547527624eSRobert Watson * 6557527624eSRobert Watson * XXXRW: Would be nice if the ifnet passed up a flag indicating whether or 6567527624eSRobert Watson * not it had already done work distribution via multi-queue. Then we could 6577527624eSRobert Watson * direct dispatch in the event load balancing was already complete and 6587527624eSRobert Watson * handle the case of interfaces with different capabilities better. 6597527624eSRobert Watson * 6607527624eSRobert Watson * XXXRW: Sort of want an M_DISTRIBUTED flag to avoid multiple distributions 6617527624eSRobert Watson * at multiple layers? 6627527624eSRobert Watson * 6637527624eSRobert Watson * XXXRW: For now, enable all this only if RSS is compiled in, although it 6647527624eSRobert Watson * works fine without RSS. Need to characterise the performance overhead 6657527624eSRobert Watson * of the detour through the netisr code in the event the result is always 6667527624eSRobert Watson * direct dispatch. 6676cb52192SRobert Watson */ 6686cb52192SRobert Watson static void 6696cb52192SRobert Watson ether_nh_input(struct mbuf *m) 6706cb52192SRobert Watson { 6716cb52192SRobert Watson 672b71bed24SAndrey V. Elsukov M_ASSERTPKTHDR(m); 673b71bed24SAndrey V. Elsukov KASSERT(m->m_pkthdr.rcvif != NULL, 674b71bed24SAndrey V. Elsukov ("%s: NULL interface pointer", __func__)); 6756cb52192SRobert Watson ether_input_internal(m->m_pkthdr.rcvif, m); 6766cb52192SRobert Watson } 6776cb52192SRobert Watson 6786cb52192SRobert Watson static struct netisr_handler ether_nh = { 6796cb52192SRobert Watson .nh_name = "ether", 6806cb52192SRobert Watson .nh_handler = ether_nh_input, 6816cb52192SRobert Watson .nh_proto = NETISR_ETHER, 6827527624eSRobert Watson #ifdef RSS 6837527624eSRobert Watson .nh_policy = NETISR_POLICY_CPU, 6847527624eSRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 6857527624eSRobert Watson .nh_m2cpuid = rss_m2cpuid, 6867527624eSRobert Watson #else 6876cb52192SRobert Watson .nh_policy = NETISR_POLICY_SOURCE, 6886cb52192SRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 6897527624eSRobert Watson #endif 6906cb52192SRobert Watson }; 6916cb52192SRobert Watson 6926cb52192SRobert Watson static void 6936cb52192SRobert Watson ether_init(__unused void *arg) 6946cb52192SRobert Watson { 6956cb52192SRobert Watson 6966cb52192SRobert Watson netisr_register(ðer_nh); 6976cb52192SRobert Watson } 6986cb52192SRobert Watson SYSINIT(ether, SI_SUB_INIT_IF, SI_ORDER_ANY, ether_init, NULL); 6996cb52192SRobert Watson 7006cb52192SRobert Watson static void 7017d4317bdSAlexander V. Chernikov vnet_ether_init(__unused void *arg) 7027d4317bdSAlexander V. Chernikov { 7037d4317bdSAlexander V. Chernikov int i; 7047d4317bdSAlexander V. Chernikov 7057d4317bdSAlexander V. Chernikov /* Initialize packet filter hooks. */ 7067d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_type = PFIL_TYPE_AF; 7077d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_af = AF_LINK; 7087d4317bdSAlexander V. Chernikov if ((i = pfil_head_register(&V_link_pfil_hook)) != 0) 7097d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to register pfil link hook, " 7107d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 711484149deSBjoern A. Zeeb #ifdef VIMAGE 712484149deSBjoern A. Zeeb netisr_register_vnet(ðer_nh); 713484149deSBjoern A. Zeeb #endif 7147d4317bdSAlexander V. Chernikov } 7157d4317bdSAlexander V. Chernikov VNET_SYSINIT(vnet_ether_init, SI_SUB_PROTO_IF, SI_ORDER_ANY, 7167d4317bdSAlexander V. Chernikov vnet_ether_init, NULL); 7177d4317bdSAlexander V. Chernikov 718484149deSBjoern A. Zeeb #ifdef VIMAGE 7197d4317bdSAlexander V. Chernikov static void 720484149deSBjoern A. Zeeb vnet_ether_pfil_destroy(__unused void *arg) 7217d4317bdSAlexander V. Chernikov { 7227d4317bdSAlexander V. Chernikov int i; 7237d4317bdSAlexander V. Chernikov 7247d4317bdSAlexander V. Chernikov if ((i = pfil_head_unregister(&V_link_pfil_hook)) != 0) 7257d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to unregister pfil link hook, " 7267d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 7277d4317bdSAlexander V. Chernikov } 728484149deSBjoern A. Zeeb VNET_SYSUNINIT(vnet_ether_pfil_uninit, SI_SUB_PROTO_PFIL, SI_ORDER_ANY, 729484149deSBjoern A. Zeeb vnet_ether_pfil_destroy, NULL); 730484149deSBjoern A. Zeeb 731484149deSBjoern A. Zeeb static void 732484149deSBjoern A. Zeeb vnet_ether_destroy(__unused void *arg) 733484149deSBjoern A. Zeeb { 734484149deSBjoern A. Zeeb 735484149deSBjoern A. Zeeb netisr_unregister_vnet(ðer_nh); 736484149deSBjoern A. Zeeb } 7377d4317bdSAlexander V. Chernikov VNET_SYSUNINIT(vnet_ether_uninit, SI_SUB_PROTO_IF, SI_ORDER_ANY, 7387d4317bdSAlexander V. Chernikov vnet_ether_destroy, NULL); 739484149deSBjoern A. Zeeb #endif 7407d4317bdSAlexander V. Chernikov 7417d4317bdSAlexander V. Chernikov 7427d4317bdSAlexander V. Chernikov 7437d4317bdSAlexander V. Chernikov static void 7446cb52192SRobert Watson ether_input(struct ifnet *ifp, struct mbuf *m) 7456cb52192SRobert Watson { 7466cb52192SRobert Watson 7474857f5fbSGeorge V. Neville-Neil struct mbuf *mn; 7484857f5fbSGeorge V. Neville-Neil 7494857f5fbSGeorge V. Neville-Neil /* 7504857f5fbSGeorge V. Neville-Neil * The drivers are allowed to pass in a chain of packets linked with 7514857f5fbSGeorge V. Neville-Neil * m_nextpkt. We split them up into separate packets here and pass 7524857f5fbSGeorge V. Neville-Neil * them up. This allows the drivers to amortize the receive lock. 7534857f5fbSGeorge V. Neville-Neil */ 7544857f5fbSGeorge V. Neville-Neil while (m) { 7554857f5fbSGeorge V. Neville-Neil mn = m->m_nextpkt; 7564857f5fbSGeorge V. Neville-Neil m->m_nextpkt = NULL; 7574857f5fbSGeorge V. Neville-Neil 7586cb52192SRobert Watson /* 7596cb52192SRobert Watson * We will rely on rcvif being set properly in the deferred context, 7606cb52192SRobert Watson * so assert it is correct here. 7616cb52192SRobert Watson */ 762e84ef07fSBjoern A. Zeeb KASSERT(m->m_pkthdr.rcvif == ifp, ("%s: ifnet mismatch m %p " 763e84ef07fSBjoern A. Zeeb "rcvif %p ifp %p", __func__, m, m->m_pkthdr.rcvif, ifp)); 764484149deSBjoern A. Zeeb CURVNET_SET_QUIET(ifp->if_vnet); 7656cb52192SRobert Watson netisr_dispatch(NETISR_ETHER, m); 766484149deSBjoern A. Zeeb CURVNET_RESTORE(); 7674857f5fbSGeorge V. Neville-Neil m = mn; 7684857f5fbSGeorge V. Neville-Neil } 7696cb52192SRobert Watson } 7706cb52192SRobert Watson 7716cb52192SRobert Watson /* 772e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 773e1e1452dSArchie Cobbs */ 774e1e1452dSArchie Cobbs void 775c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 776e1e1452dSArchie Cobbs { 777c1d93b05SSam Leffler struct ether_header *eh; 7787d4317bdSAlexander V. Chernikov int i, isr; 779e1e1452dSArchie Cobbs u_short ether_type; 78069462a82SBruce M Simpson 78169462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 78269462a82SBruce M Simpson 7837d4317bdSAlexander V. Chernikov /* Do not grab PROMISC frames in case we are re-entered. */ 7847d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook) && !(m->m_flags & M_PROMISC)) { 7857d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_IN, NULL); 7867d4317bdSAlexander V. Chernikov 7877d4317bdSAlexander V. Chernikov if (i != 0 || m == NULL) 7887d4317bdSAlexander V. Chernikov return; 78969462a82SBruce M Simpson } 7907d4317bdSAlexander V. Chernikov 791c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 792cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 793c1d93b05SSam Leffler 794a9771948SGleb Smirnoff /* 79569462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 79669462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 797a9771948SGleb Smirnoff */ 79869462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 79969462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 80075ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 8013751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_NOPROTO, 1); 8026c23e6ccSRuslan Ermilov m_freem(m); 8036c23e6ccSRuslan Ermilov return; 8046c23e6ccSRuslan Ermilov } 80569462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 80669462a82SBruce M Simpson __func__)); 80769462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 80869462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 809c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 810c1d93b05SSam Leffler return; 811c1d93b05SSam Leffler } 812c1d93b05SSam Leffler 813c1d93b05SSam Leffler /* 81469462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 81569462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 816c1d93b05SSam Leffler */ 81769462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 818c1d93b05SSam Leffler m_freem(m); 819c1d93b05SSam Leffler return; 820c1d93b05SSam Leffler } 821c1d93b05SSam Leffler 82269462a82SBruce M Simpson /* 82369462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 82469462a82SBruce M Simpson * Strip off Ethernet header. 82569462a82SBruce M Simpson */ 82669462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 82786bd0491SAndre Oppermann m_clrprotoflags(m); 828797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 829c1d93b05SSam Leffler 83069462a82SBruce M Simpson /* 83169462a82SBruce M Simpson * Dispatch frame to upper layer. 83269462a82SBruce M Simpson */ 833307d80beSDavid Greenman switch (ether_type) { 834df8bae1dSRodney W. Grimes #ifdef INET 835df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 8361cafed39SJonathan Lemon isr = NETISR_IP; 837df8bae1dSRodney W. Grimes break; 838df8bae1dSRodney W. Grimes 839df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 84008aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 84108aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 84208aadfbbSJonathan Lemon m_freem(m); 84308aadfbbSJonathan Lemon return; 84408aadfbbSJonathan Lemon } 8451cafed39SJonathan Lemon isr = NETISR_ARP; 846df8bae1dSRodney W. Grimes break; 847df8bae1dSRodney W. Grimes #endif 84882cd038dSYoshinobu Inoue #ifdef INET6 84982cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 8501cafed39SJonathan Lemon isr = NETISR_IPV6; 85182cd038dSYoshinobu Inoue break; 85282cd038dSYoshinobu Inoue #endif 853df8bae1dSRodney W. Grimes default: 8541cafed39SJonathan Lemon goto discard; 855df8bae1dSRodney W. Grimes } 8561cafed39SJonathan Lemon netisr_dispatch(isr, m); 857c1d93b05SSam Leffler return; 8581cafed39SJonathan Lemon 859c1d93b05SSam Leffler discard: 860c1d93b05SSam Leffler /* 861c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 862c1d93b05SSam Leffler * hand the packet to it for last chance processing; 863c1d93b05SSam Leffler * otherwise dispose of it. 864c1d93b05SSam Leffler */ 865833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 866514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 867514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 868c1d93b05SSam Leffler /* 869c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 870c1d93b05SSam Leffler * consistent view of inbound packets. 871c1d93b05SSam Leffler */ 872eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_HDR_LEN, M_NOWAIT); 873c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 874c1d93b05SSam Leffler return; 875c1d93b05SSam Leffler } 876c1d93b05SSam Leffler m_freem(m); 877c1d93b05SSam Leffler } 878c1d93b05SSam Leffler 879c1d93b05SSam Leffler /* 880c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 881c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 882c1d93b05SSam Leffler * 883c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 884c1d93b05SSam Leffler * 885c1d93b05SSam Leffler * since there's no static buffer involved. 886c1d93b05SSam Leffler */ 887c1d93b05SSam Leffler char * 888c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 889c1d93b05SSam Leffler { 890c1d93b05SSam Leffler static char etherbuf[18]; 891c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 892c1d93b05SSam Leffler return (etherbuf); 893df8bae1dSRodney W. Grimes } 894df8bae1dSRodney W. Grimes 895df8bae1dSRodney W. Grimes /* 896df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 897df8bae1dSRodney W. Grimes */ 898df8bae1dSRodney W. Grimes void 899d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 900df8bae1dSRodney W. Grimes { 901f93dfa28SBrooks Davis int i; 902098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 903098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 904df8bae1dSRodney W. Grimes 905c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 906c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 907cfeff1b6SJonathan Lemon if_attach(ifp); 908df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 909c1d93b05SSam Leffler ifp->if_output = ether_output; 910c1d93b05SSam Leffler ifp->if_input = ether_input; 9111158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 9124fb3a820SAlexander V. Chernikov ifp->if_requestencap = ether_requestencap; 913d3c351c5SMarko Zec #ifdef VIMAGE 914d3c351c5SMarko Zec ifp->if_reassign = ether_reassign; 915d3c351c5SMarko Zec #endif 916a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 917c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 918322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 919c1d93b05SSam Leffler 9204a0d6638SRuslan Ermilov ifa = ifp->if_addr; 9216e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 92259562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 923df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 924df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 925d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 926c1d93b05SSam Leffler 9275b1a5e45SRavi Pokala if (ifp->if_hw_addr != NULL) 928ddae5750SRavi Pokala bcopy(lla, ifp->if_hw_addr, ifp->if_addrlen); 929ddae5750SRavi Pokala 930797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 931e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 932e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 933e3bbbec2SMatthew N. Dodd 934f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 935f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 936d09ed26fSRuslan Ermilov if (lla[i] != 0) 937f93dfa28SBrooks Davis break; 938f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 939d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 940ef1f9169SMarcel Moolenaar 941ef1f9169SMarcel Moolenaar uuid_ether_add(LLADDR(sdl)); 9428819ad85SSepherosa Ziehau 9438819ad85SSepherosa Ziehau /* Add necessary bits are setup; announce it now. */ 9448819ad85SSepherosa Ziehau EVENTHANDLER_INVOKE(ether_ifattach_event, ifp); 9458819ad85SSepherosa Ziehau if (IS_DEFAULT_VNET(curvnet)) 9468819ad85SSepherosa Ziehau devctl_notify("ETHERNET", ifp->if_xname, "IFATTACH", NULL); 947e1e1452dSArchie Cobbs } 948e1e1452dSArchie Cobbs 94921b8ebd9SArchie Cobbs /* 95021b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 95121b8ebd9SArchie Cobbs */ 95221b8ebd9SArchie Cobbs void 953c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 95421b8ebd9SArchie Cobbs { 955ef1f9169SMarcel Moolenaar struct sockaddr_dl *sdl; 956ef1f9169SMarcel Moolenaar 957ef1f9169SMarcel Moolenaar sdl = (struct sockaddr_dl *)(ifp->if_addr->ifa_addr); 958ef1f9169SMarcel Moolenaar uuid_ether_del(LLADDR(sdl)); 959ef1f9169SMarcel Moolenaar 960833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 961514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 962514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 96321b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 964514bcb89SPoul-Henning Kamp } 96520a65f37SAndrew Thompson 96621b8ebd9SArchie Cobbs bpfdetach(ifp); 96721b8ebd9SArchie Cobbs if_detach(ifp); 96821b8ebd9SArchie Cobbs } 96921b8ebd9SArchie Cobbs 970d3c351c5SMarko Zec #ifdef VIMAGE 971d3c351c5SMarko Zec void 972d3c351c5SMarko Zec ether_reassign(struct ifnet *ifp, struct vnet *new_vnet, char *unused __unused) 973d3c351c5SMarko Zec { 974d3c351c5SMarko Zec 975833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 976d3c351c5SMarko Zec KASSERT(ng_ether_detach_p != NULL, 977d3c351c5SMarko Zec ("ng_ether_detach_p is NULL")); 978d3c351c5SMarko Zec (*ng_ether_detach_p)(ifp); 979d3c351c5SMarko Zec } 980d3c351c5SMarko Zec 981d3c351c5SMarko Zec if (ng_ether_attach_p != NULL) { 982d3c351c5SMarko Zec CURVNET_SET_QUIET(new_vnet); 983d3c351c5SMarko Zec (*ng_ether_attach_p)(ifp); 984d3c351c5SMarko Zec CURVNET_RESTORE(); 985d3c351c5SMarko Zec } 986d3c351c5SMarko Zec } 987d3c351c5SMarko Zec #endif 988d3c351c5SMarko Zec 989ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 990602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 99130106f6aSPoul-Henning Kamp 99216b4a343SChristian Weisgerber #if 0 99316b4a343SChristian Weisgerber /* 99416b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 99516b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 99616b4a343SChristian Weisgerber * than the double-loop. 99716b4a343SChristian Weisgerber */ 99816b4a343SChristian Weisgerber uint32_t 99916b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 100016b4a343SChristian Weisgerber { 100116b4a343SChristian Weisgerber size_t i; 100216b4a343SChristian Weisgerber uint32_t crc; 100316b4a343SChristian Weisgerber int bit; 100416b4a343SChristian Weisgerber uint8_t data; 100516b4a343SChristian Weisgerber 100616b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 100716b4a343SChristian Weisgerber 100816b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 1009933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 101016b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 101116b4a343SChristian Weisgerber crc >>= 1; 101216b4a343SChristian Weisgerber if (carry) 101316b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 101416b4a343SChristian Weisgerber } 1015933dad75SAntoine Brodin } 101616b4a343SChristian Weisgerber 101716b4a343SChristian Weisgerber return (crc); 101816b4a343SChristian Weisgerber } 101916b4a343SChristian Weisgerber #else 102016b4a343SChristian Weisgerber uint32_t 102116b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 102216b4a343SChristian Weisgerber { 102316b4a343SChristian Weisgerber static const uint32_t crctab[] = { 102416b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 102516b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 102616b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 102716b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 102816b4a343SChristian Weisgerber }; 102916b4a343SChristian Weisgerber size_t i; 103016b4a343SChristian Weisgerber uint32_t crc; 103116b4a343SChristian Weisgerber 103216b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 103316b4a343SChristian Weisgerber 103416b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 103516b4a343SChristian Weisgerber crc ^= buf[i]; 103616b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 103716b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 103816b4a343SChristian Weisgerber } 103916b4a343SChristian Weisgerber 104016b4a343SChristian Weisgerber return (crc); 104116b4a343SChristian Weisgerber } 104216b4a343SChristian Weisgerber #endif 104316b4a343SChristian Weisgerber 104416b4a343SChristian Weisgerber uint32_t 104516b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 104616b4a343SChristian Weisgerber { 104716b4a343SChristian Weisgerber size_t i; 104816b4a343SChristian Weisgerber uint32_t crc, carry; 104916b4a343SChristian Weisgerber int bit; 105016b4a343SChristian Weisgerber uint8_t data; 105116b4a343SChristian Weisgerber 105216b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 105316b4a343SChristian Weisgerber 105416b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 105516b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 105616b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 105716b4a343SChristian Weisgerber crc <<= 1; 105816b4a343SChristian Weisgerber if (carry) 105916b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 106016b4a343SChristian Weisgerber } 106116b4a343SChristian Weisgerber } 106216b4a343SChristian Weisgerber 106316b4a343SChristian Weisgerber return (crc); 106416b4a343SChristian Weisgerber } 106516b4a343SChristian Weisgerber 1066fb583156SDavid Greenman int 1067995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 106830106f6aSPoul-Henning Kamp { 106930106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 107030106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 1071fb583156SDavid Greenman int error = 0; 107230106f6aSPoul-Henning Kamp 107330106f6aSPoul-Henning Kamp switch (command) { 107430106f6aSPoul-Henning Kamp case SIOCSIFADDR: 107530106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 107630106f6aSPoul-Henning Kamp 107730106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 107830106f6aSPoul-Henning Kamp #ifdef INET 107930106f6aSPoul-Henning Kamp case AF_INET: 108030106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1081322dcb8dSMax Khon arp_ifinit(ifp, ifa); 108230106f6aSPoul-Henning Kamp break; 108330106f6aSPoul-Henning Kamp #endif 108430106f6aSPoul-Henning Kamp default: 108530106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 108630106f6aSPoul-Henning Kamp break; 108730106f6aSPoul-Henning Kamp } 108830106f6aSPoul-Henning Kamp break; 108930106f6aSPoul-Henning Kamp 109030106f6aSPoul-Henning Kamp case SIOCGIFADDR: 109130106f6aSPoul-Henning Kamp { 109230106f6aSPoul-Henning Kamp struct sockaddr *sa; 109330106f6aSPoul-Henning Kamp 109430106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 10954a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 109630106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 109730106f6aSPoul-Henning Kamp } 109830106f6aSPoul-Henning Kamp break; 1099fb583156SDavid Greenman 1100fb583156SDavid Greenman case SIOCSIFMTU: 1101fb583156SDavid Greenman /* 1102fb583156SDavid Greenman * Set the interface MTU. 1103fb583156SDavid Greenman */ 1104fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1105fb583156SDavid Greenman error = EINVAL; 1106fb583156SDavid Greenman } else { 1107fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 110830106f6aSPoul-Henning Kamp } 1109fb583156SDavid Greenman break; 1110c1d93b05SSam Leffler default: 1111c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1112c1d93b05SSam Leffler break; 1113fb583156SDavid Greenman } 1114fb583156SDavid Greenman return (error); 111530106f6aSPoul-Henning Kamp } 11161158dfb7SGarrett Wollman 111737c84183SPoul-Henning Kamp static int 111872fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 111972fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 11201158dfb7SGarrett Wollman { 11211158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1122d7647d96SDag-Erling Smørgrav #ifdef INET 11231158dfb7SGarrett Wollman struct sockaddr_in *sin; 1124d7647d96SDag-Erling Smørgrav #endif 112582cd038dSYoshinobu Inoue #ifdef INET6 112682cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 112782cd038dSYoshinobu Inoue #endif 11281158dfb7SGarrett Wollman u_char *e_addr; 11291158dfb7SGarrett Wollman 11301158dfb7SGarrett Wollman switch(sa->sa_family) { 11311158dfb7SGarrett Wollman case AF_LINK: 11327f33a738SJulian Elischer /* 11337f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 11347f33a738SJulian Elischer */ 11351158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 11361158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1137086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 11381158dfb7SGarrett Wollman return EADDRNOTAVAIL; 1139155d72c4SPedro F. Giffuni *llsa = NULL; 11401158dfb7SGarrett Wollman return 0; 11411158dfb7SGarrett Wollman 11421158dfb7SGarrett Wollman #ifdef INET 11431158dfb7SGarrett Wollman case AF_INET: 11441158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 11451158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 11461158dfb7SGarrett Wollman return EADDRNOTAVAIL; 114795fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 11481158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 11491158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 11501158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 11511158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 11521158dfb7SGarrett Wollman return 0; 11531158dfb7SGarrett Wollman #endif 115482cd038dSYoshinobu Inoue #ifdef INET6 115582cd038dSYoshinobu Inoue case AF_INET6: 115682cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1157595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1158595b8a1cSJun-ichiro itojun Hagino /* 1159595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1160595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1161595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1162595b8a1cSJun-ichiro itojun Hagino */ 1163595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1164155d72c4SPedro F. Giffuni *llsa = NULL; 1165595b8a1cSJun-ichiro itojun Hagino return 0; 1166595b8a1cSJun-ichiro itojun Hagino } 116782cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 116882cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 116995fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 117082cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 117182cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 117282cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 117382cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 117482cd038dSYoshinobu Inoue return 0; 117582cd038dSYoshinobu Inoue #endif 11761158dfb7SGarrett Wollman 11771158dfb7SGarrett Wollman default: 11781158dfb7SGarrett Wollman /* 11791158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 11801158dfb7SGarrett Wollman * that counts... 11811158dfb7SGarrett Wollman */ 11821158dfb7SGarrett Wollman return EAFNOSUPPORT; 11831158dfb7SGarrett Wollman } 11841158dfb7SGarrett Wollman } 118540811c14SMatthew N. Dodd 118640811c14SMatthew N. Dodd static moduledata_t ether_mod = { 1187833e8dc5SGleb Smirnoff .name = "ether", 118840811c14SMatthew N. Dodd }; 118940811c14SMatthew N. Dodd 119052f1277eSChristian S.J. Peron void 119152f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 119252f1277eSChristian S.J. Peron { 119352f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 119452f1277eSChristian S.J. Peron struct mbuf mv, mb; 119552f1277eSChristian S.J. Peron 119652f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 119752f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 119852f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 119952f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 120052f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 120152f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 120252f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 120352f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 120452f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 120552f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 120652f1277eSChristian S.J. Peron /* 120752f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 120852f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 120952f1277eSChristian S.J. Peron * 121052f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 121152f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 121252f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 121352f1277eSChristian S.J. Peron * 121452f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 121552f1277eSChristian S.J. Peron */ 121652f1277eSChristian S.J. Peron if (data != NULL) { 121752f1277eSChristian S.J. Peron mv.m_next = m; 121852f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 121952f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 122052f1277eSChristian S.J. Peron mb.m_next = &mv; 122152f1277eSChristian S.J. Peron mb.m_data = data; 122252f1277eSChristian S.J. Peron mb.m_len = dlen; 122352f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 122452f1277eSChristian S.J. Peron } else 122552f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 122652f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 122752f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 122852f1277eSChristian S.J. Peron } 122952f1277eSChristian S.J. Peron 123060e87ca8SAndrew Thompson struct mbuf * 1231a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 123260e87ca8SAndrew Thompson { 123360e87ca8SAndrew Thompson struct ether_vlan_header *evl; 123460e87ca8SAndrew Thompson 1235eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_NOWAIT); 123660e87ca8SAndrew Thompson if (m == NULL) 123760e87ca8SAndrew Thompson return (NULL); 123860e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 123960e87ca8SAndrew Thompson 124060e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 124160e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 124260e87ca8SAndrew Thompson if (m == NULL) 124360e87ca8SAndrew Thompson return (NULL); 124460e87ca8SAndrew Thompson } 124560e87ca8SAndrew Thompson 124660e87ca8SAndrew Thompson /* 124760e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 124860e87ca8SAndrew Thompson * with 802.1Q encapsulation. 124960e87ca8SAndrew Thompson */ 125060e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 125160e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 125260e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 125360e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 125460e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 125560e87ca8SAndrew Thompson return (m); 125660e87ca8SAndrew Thompson } 125760e87ca8SAndrew Thompson 1258fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 125940811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1260