1c398230bSWarner Losh /*- 2df8bae1dSRodney W. Grimes * Copyright (c) 1982, 1989, 1993 3df8bae1dSRodney W. Grimes * The Regents of the University of California. All rights reserved. 4df8bae1dSRodney W. Grimes * 5df8bae1dSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 6df8bae1dSRodney W. Grimes * modification, are permitted provided that the following conditions 7df8bae1dSRodney W. Grimes * are met: 8df8bae1dSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 9df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 10df8bae1dSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 11df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 12df8bae1dSRodney W. Grimes * documentation and/or other materials provided with the distribution. 13df8bae1dSRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 14df8bae1dSRodney W. Grimes * may be used to endorse or promote products derived from this software 15df8bae1dSRodney W. Grimes * without specific prior written permission. 16df8bae1dSRodney W. Grimes * 17df8bae1dSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18df8bae1dSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19df8bae1dSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20df8bae1dSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21df8bae1dSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22df8bae1dSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23df8bae1dSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24df8bae1dSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25df8bae1dSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26df8bae1dSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27df8bae1dSRodney W. Grimes * SUCH DAMAGE. 28df8bae1dSRodney W. Grimes * 29df8bae1dSRodney W. Grimes * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93 30c3aac50fSPeter Wemm * $FreeBSD$ 31df8bae1dSRodney W. Grimes */ 32df8bae1dSRodney W. Grimes 331d5e9e22SEivind Eklund #include "opt_inet.h" 34cfa1ca9dSYoshinobu Inoue #include "opt_inet6.h" 354cf49a43SJulian Elischer #include "opt_netgraph.h" 366eeac1d9SJulian Elischer #include "opt_mbuf_profiling.h" 377527624eSRobert Watson #include "opt_rss.h" 38430df5f4SEivind Eklund 39df8bae1dSRodney W. Grimes #include <sys/param.h> 40df8bae1dSRodney W. Grimes #include <sys/systm.h> 41df8bae1dSRodney W. Grimes #include <sys/kernel.h> 42385195c0SMarko Zec #include <sys/lock.h> 43df8bae1dSRodney W. Grimes #include <sys/malloc.h> 4441ee9f1cSPoul-Henning Kamp #include <sys/module.h> 45df8bae1dSRodney W. Grimes #include <sys/mbuf.h> 4610b1fde0SMark Murray #include <sys/random.h> 47df8bae1dSRodney W. Grimes #include <sys/socket.h> 4851a53488SBruce Evans #include <sys/sockio.h> 49602d513cSGarrett Wollman #include <sys/sysctl.h> 50ef1f9169SMarcel Moolenaar #include <sys/uuid.h> 51df8bae1dSRodney W. Grimes 52df8bae1dSRodney W. Grimes #include <net/if.h> 5376039bc8SGleb Smirnoff #include <net/if_var.h> 54d7647d96SDag-Erling Smørgrav #include <net/if_arp.h> 55df8bae1dSRodney W. Grimes #include <net/netisr.h> 56df8bae1dSRodney W. Grimes #include <net/route.h> 57df8bae1dSRodney W. Grimes #include <net/if_llc.h> 58df8bae1dSRodney W. Grimes #include <net/if_dl.h> 59df8bae1dSRodney W. Grimes #include <net/if_types.h> 602e2de7f2SArchie Cobbs #include <net/bpf.h> 61e1e1452dSArchie Cobbs #include <net/ethernet.h> 62fd6238a6SAndrew Thompson #include <net/if_bridgevar.h> 63c1d93b05SSam Leffler #include <net/if_vlan_var.h> 646e6b3f7cSQing Li #include <net/if_llatbl.h> 657d4317bdSAlexander V. Chernikov #include <net/pfil.h> 66b2bdc62aSAdrian Chadd #include <net/rss_config.h> 674b79449eSBjoern A. Zeeb #include <net/vnet.h> 68df8bae1dSRodney W. Grimes 6975bf2db3SGleb Smirnoff #include <netpfil/pf/pf_mtag.h> 7075bf2db3SGleb Smirnoff 7182cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 72df8bae1dSRodney W. Grimes #include <netinet/in.h> 73df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 74df8bae1dSRodney W. Grimes #include <netinet/if_ether.h> 7554bfbd51SWill Andrews #include <netinet/ip_carp.h> 760bcfa8e4SLuigi Rizzo #include <netinet/ip_var.h> 771d5e9e22SEivind Eklund #endif 7882cd038dSYoshinobu Inoue #ifdef INET6 7982cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 8082cd038dSYoshinobu Inoue #endif 81aed55708SRobert Watson #include <security/mac/mac_framework.h> 82aed55708SRobert Watson 83d54d93acSEd Maste #ifdef CTASSERT 84d54d93acSEd Maste CTASSERT(sizeof (struct ether_header) == ETHER_ADDR_LEN * 2 + 2); 85d54d93acSEd Maste CTASSERT(sizeof (struct ether_addr) == ETHER_ADDR_LEN); 86d54d93acSEd Maste #endif 87d54d93acSEd Maste 887d4317bdSAlexander V. Chernikov VNET_DEFINE(struct pfil_head, link_pfil_hook); /* Packet filter hooks */ 897d4317bdSAlexander V. Chernikov 90e1e1452dSArchie Cobbs /* netgraph node hooks for ng_ether(4) */ 91c1d93b05SSam Leffler void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 92c1d93b05SSam Leffler void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 93e1e1452dSArchie Cobbs int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 94e1e1452dSArchie Cobbs void (*ng_ether_attach_p)(struct ifnet *ifp); 95e1e1452dSArchie Cobbs void (*ng_ether_detach_p)(struct ifnet *ifp); 96e1e1452dSArchie Cobbs 97824eb9dcSDavid E. O'Brien void (*vlan_input_p)(struct ifnet *, struct mbuf *); 989d4fe4b2SBrooks Davis 99fd6238a6SAndrew Thompson /* if_bridge(4) support */ 1008f867517SAndrew Thompson struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *); 1018f867517SAndrew Thompson int (*bridge_output_p)(struct ifnet *, struct mbuf *, 1028f867517SAndrew Thompson struct sockaddr *, struct rtentry *); 103c8b01292SAndrew Thompson void (*bridge_dn_p)(struct mbuf *, struct ifnet *); 1048f867517SAndrew Thompson 10518242d3bSAndrew Thompson /* if_lagg(4) support */ 10618242d3bSAndrew Thompson struct mbuf *(*lagg_input_p)(struct ifnet *, struct mbuf *); 107b47888ceSAndrew Thompson 108e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 109868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 110868d8b62SMatthew N. Dodd 111929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 112929ddbbbSAlfred Perlstein struct sockaddr *); 113d3c351c5SMarko Zec #ifdef VIMAGE 114d3c351c5SMarko Zec static void ether_reassign(struct ifnet *, struct vnet *, char *); 115d3c351c5SMarko Zec #endif 1164fb3a820SAlexander V. Chernikov static int ether_requestencap(struct ifnet *, struct if_encap_req *); 117868d8b62SMatthew N. Dodd 11869462a82SBruce M Simpson #define ETHER_IS_BROADCAST(addr) \ 11969462a82SBruce M Simpson (bcmp(etherbroadcastaddr, (addr), ETHER_ADDR_LEN) == 0) 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 struct rtentry *rt0 = NULL; 2926d768226SGeorge V. Neville-Neil int addref = 0; 293df8bae1dSRodney W. Grimes 2944fb3a820SAlexander V. Chernikov phdr = NULL; 2954fb3a820SAlexander V. Chernikov pflags = 0; 296279aa3d4SKip Macy if (ro != NULL) { 2976d768226SGeorge V. Neville-Neil /* XXX BPF uses ro_prepend */ 2986d768226SGeorge V. Neville-Neil if (ro->ro_prepend != NULL) { 2994fb3a820SAlexander V. Chernikov phdr = ro->ro_prepend; 3004fb3a820SAlexander V. Chernikov hlen = ro->ro_plen; 3016d768226SGeorge V. Neville-Neil } else if (!(m->m_flags & (M_BCAST | M_MCAST))) { 3026d768226SGeorge V. Neville-Neil if ((ro->ro_flags & RT_LLE_CACHE) != 0) { 3036d768226SGeorge V. Neville-Neil lle = ro->ro_lle; 3046d768226SGeorge V. Neville-Neil if (lle != NULL && 3056d768226SGeorge V. Neville-Neil (lle->la_flags & LLE_VALID) == 0) { 3066d768226SGeorge V. Neville-Neil LLE_FREE(lle); 3076d768226SGeorge V. Neville-Neil lle = NULL; /* redundant */ 3086d768226SGeorge V. Neville-Neil ro->ro_lle = NULL; 309279aa3d4SKip Macy } 3106d768226SGeorge V. Neville-Neil if (lle == NULL) { 3116d768226SGeorge V. Neville-Neil /* if we lookup, keep cache */ 3126d768226SGeorge V. Neville-Neil addref = 1; 3136d768226SGeorge V. Neville-Neil } 3146d768226SGeorge V. Neville-Neil } 3156d768226SGeorge V. Neville-Neil if (lle != NULL) { 3166d768226SGeorge V. Neville-Neil phdr = lle->r_linkdata; 3176d768226SGeorge V. Neville-Neil hlen = lle->r_hdrlen; 3186d768226SGeorge V. Neville-Neil pflags = lle->r_flags; 3196d768226SGeorge V. Neville-Neil } 3206d768226SGeorge V. Neville-Neil } 3216d768226SGeorge V. Neville-Neil rt0 = ro->ro_rt; 3226d768226SGeorge V. Neville-Neil } 3236d768226SGeorge V. Neville-Neil 32443b29369SRobert Watson #ifdef MAC 32530d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 32643b29369SRobert Watson if (error) 32743b29369SRobert Watson senderr(error); 32843b29369SRobert Watson #endif 32943b29369SRobert Watson 3306eeac1d9SJulian Elischer M_PROFILE(m); 331afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 332afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 33313f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 33413f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 335df8bae1dSRodney W. Grimes senderr(ENETDOWN); 3367f760c48SMatthew N. Dodd 3374fb3a820SAlexander V. Chernikov if (phdr == NULL) { 3384fb3a820SAlexander V. Chernikov /* No prepend data supplied. Try to calculate ourselves. */ 3394fb3a820SAlexander V. Chernikov phdr = linkhdr; 34084dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 3416d768226SGeorge V. Neville-Neil error = ether_resolve_addr(ifp, m, dst, ro, phdr, &pflags, 3426d768226SGeorge V. Neville-Neil addref ? &lle : NULL); 3436d768226SGeorge V. Neville-Neil if (addref && lle != NULL) 3446d768226SGeorge V. Neville-Neil ro->ro_lle = lle; 3454fb3a820SAlexander V. Chernikov if (error != 0) 346cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 34743a6c75aSMatthew N. Dodd } 34843a6c75aSMatthew N. Dodd 3494fb3a820SAlexander V. Chernikov if ((pflags & RT_L2_ME) != 0) { 35022f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, m); 3516e6b3f7cSQing Li return (if_simloop(ifp, m, dst->sa_family, 0)); 3526e6b3f7cSQing Li } 3534fb3a820SAlexander V. Chernikov loop_copy = pflags & RT_MAY_LOOP; 3546e6b3f7cSQing Li 355df8bae1dSRodney W. Grimes /* 356df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 357df8bae1dSRodney W. Grimes * allocate another. 3586cdb1854SAlexander V. Chernikov * 3596cdb1854SAlexander V. Chernikov * Note that we do prepend regardless of RT_HAS_HEADER flag. 3606cdb1854SAlexander V. Chernikov * This is done because BPF code shifts m_data pointer 3616cdb1854SAlexander V. Chernikov * to the end of ethernet header prior to calling if_output(). 362df8bae1dSRodney W. Grimes */ 3634fb3a820SAlexander V. Chernikov M_PREPEND(m, hlen, M_NOWAIT); 3642166ffe8SRobert Watson if (m == NULL) 365df8bae1dSRodney W. Grimes senderr(ENOBUFS); 3664fb3a820SAlexander V. Chernikov if ((pflags & RT_HAS_HEADER) == 0) { 367df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 3684fb3a820SAlexander V. Chernikov memcpy(eh, phdr, hlen); 369c69aeaadSAlexander V. Chernikov } 370ed7509acSJulian Elischer 371ed7509acSJulian Elischer /* 372ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 373ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 374ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 375ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 376ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 377ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 378ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 379ed7509acSJulian Elischer */ 3804fb3a820SAlexander V. Chernikov if ((m->m_flags & M_BCAST) && loop_copy && (ifp->if_flags & IFF_SIMPLEX) && 38160ee3847SMax Laier ((t = pf_find_mtag(m)) == NULL || !t->routed)) { 38206f684b0SMatthew N. Dodd struct mbuf *n; 383ed7509acSJulian Elischer 384294dd290SLuigi Rizzo /* 385294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 386294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 387294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 388294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 389294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 390294dd290SLuigi Rizzo * extra data copying vs. extra locking). 3919983b3c0SYaroslav Tykhiy * 3929983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 3939983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 3949983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 395294dd290SLuigi Rizzo */ 396eb1b1807SGleb Smirnoff if ((n = m_dup(m, M_NOWAIT)) != NULL) { 39722f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, n); 39806a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 399c1404dc0SArchie Cobbs } else 4003751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 401ed7509acSJulian Elischer } 4022e2de7f2SArchie Cobbs 4033f7d1396SAndrew Thompson /* 4043f7d1396SAndrew Thompson * Bridges require special output handling. 4053f7d1396SAndrew Thompson */ 4063f7d1396SAndrew Thompson if (ifp->if_bridge) { 4073f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 4083f7d1396SAndrew Thompson return (error); 4093f7d1396SAndrew Thompson } 4103f7d1396SAndrew Thompson 411259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 412a9771948SGleb Smirnoff if (ifp->if_carp && 41308b68b0eSGleb Smirnoff (error = (*carp_output_p)(ifp, m, dst))) 414a9771948SGleb Smirnoff goto bad; 415a9771948SGleb Smirnoff #endif 416a9771948SGleb Smirnoff 417e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 418833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 419514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 420514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 421e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 422e1e1452dSArchie Cobbs bad: if (m != NULL) 423e1e1452dSArchie Cobbs m_freem(m); 424e1e1452dSArchie Cobbs return (error); 425e1e1452dSArchie Cobbs } 426e1e1452dSArchie Cobbs if (m == NULL) 427e1e1452dSArchie Cobbs return (0); 428e1e1452dSArchie Cobbs } 429e1e1452dSArchie Cobbs 430e1e1452dSArchie Cobbs /* Continue with link-layer output */ 431e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 432e1e1452dSArchie Cobbs } 433e1e1452dSArchie Cobbs 434e1e1452dSArchie Cobbs /* 435e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 436e1e1452dSArchie Cobbs * 437e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 438e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 439e1e1452dSArchie Cobbs */ 440e1e1452dSArchie Cobbs int 441c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 442e1e1452dSArchie Cobbs { 4437d4317bdSAlexander V. Chernikov int i; 4442b25acc1SLuigi Rizzo 4457d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook)) { 4467d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_OUT, NULL); 4477d4317bdSAlexander V. Chernikov 4487d4317bdSAlexander V. Chernikov if (i != 0) 4497d4317bdSAlexander V. Chernikov return (EACCES); 4507d4317bdSAlexander V. Chernikov 4517d4317bdSAlexander V. Chernikov if (m == NULL) 4527d4317bdSAlexander V. Chernikov return (0); 4534b984093SLuigi Rizzo } 4542b25acc1SLuigi Rizzo 455df8bae1dSRodney W. Grimes /* 456df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 457df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 458df8bae1dSRodney W. Grimes */ 459aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 460df8bae1dSRodney W. Grimes } 461df8bae1dSRodney W. Grimes 4624b984093SLuigi Rizzo /* 463c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 464c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 465df8bae1dSRodney W. Grimes */ 466c1d93b05SSam Leffler static void 4676cb52192SRobert Watson ether_input_internal(struct ifnet *ifp, struct mbuf *m) 468df8bae1dSRodney W. Grimes { 469c1d93b05SSam Leffler struct ether_header *eh; 470c1d93b05SSam Leffler u_short etype; 471df8bae1dSRodney W. Grimes 47269462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 47369462a82SBruce M Simpson m_freem(m); 47469462a82SBruce M Simpson return; 47569462a82SBruce M Simpson } 47669462a82SBruce M Simpson #ifdef DIAGNOSTIC 47769462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 47869462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 47969462a82SBruce M Simpson m_freem(m); 48069462a82SBruce M Simpson return; 48169462a82SBruce M Simpson } 48269462a82SBruce M Simpson #endif 483797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 484c1d93b05SSam Leffler /* XXX maybe should pullup? */ 485c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 486c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 487c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 4883751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 489c1d93b05SSam Leffler m_freem(m); 490c1d93b05SSam Leffler return; 4912e2de7f2SArchie Cobbs } 492c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 493c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 494d1b06863SMark Murray random_harvest_queue(m, sizeof(*m), 2, RANDOM_NET_ETHER); 495d1b06863SMark Murray 49621ca7b57SMarko Zec CURVNET_SET_QUIET(ifp->if_vnet); 49721ca7b57SMarko Zec 49869462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 49969462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 50069462a82SBruce M Simpson m->m_flags |= M_BCAST; 50169462a82SBruce M Simpson else 50269462a82SBruce M Simpson m->m_flags |= M_MCAST; 5033751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1); 50469462a82SBruce M Simpson } 50569462a82SBruce M Simpson 506533d8562SRobert Watson #ifdef MAC 507533d8562SRobert Watson /* 508533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 509533d8562SRobert Watson * consumers can get to it. 510533d8562SRobert Watson */ 51130d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 512533d8562SRobert Watson #endif 513533d8562SRobert Watson 514c1d93b05SSam Leffler /* 51569462a82SBruce M Simpson * Give bpf a chance at the packet. 516c1d93b05SSam Leffler */ 517d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 5182e2de7f2SArchie Cobbs 51969462a82SBruce M Simpson /* 52069462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 52169462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 52269462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 52369462a82SBruce M Simpson */ 524c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 525c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 526c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 527c1d93b05SSam Leffler } 528c1d93b05SSam Leffler 5294cdc1f54SGleb Smirnoff if (!(ifp->if_capenable & IFCAP_HWSTATS)) 5303751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 53105463bb5SDavid Greenman 53269462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 533de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 534de572b37SChristian S.J. Peron m_freem(m); 53521ca7b57SMarko Zec CURVNET_RESTORE(); 536de572b37SChristian S.J. Peron return; 537de572b37SChristian S.J. Peron } 538de572b37SChristian S.J. Peron 53918242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 540b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 54118242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 54218242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 54318242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 544b47888ceSAndrew Thompson if (m != NULL) 545b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 5462db13e75SMarko Zec else { 5472db13e75SMarko Zec CURVNET_RESTORE(); 548b47888ceSAndrew Thompson return; 549b47888ceSAndrew Thompson } 5502db13e75SMarko Zec } 551b47888ceSAndrew Thompson 55269462a82SBruce M Simpson /* 55369462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 55469462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 55569462a82SBruce M Simpson * path correctly. 55669462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 55769462a82SBruce M Simpson */ 55869462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 55969462a82SBruce M Simpson struct ether_vlan_header *evl; 56069462a82SBruce M Simpson 56169462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 56269462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 563402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 56469462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 565402d5e27SBruce M Simpson #endif 5663751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 5672db13e75SMarko Zec CURVNET_RESTORE(); 56869462a82SBruce M Simpson return; 56969462a82SBruce M Simpson } 57069462a82SBruce M Simpson 57169462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 57269462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 57369462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 57469462a82SBruce M Simpson 57569462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 57669462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 57769462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 57897cce87fSGleb Smirnoff eh = mtod(m, struct ether_header *); 57969462a82SBruce M Simpson } 58069462a82SBruce M Simpson 581a34c6aebSBjoern A. Zeeb M_SETFIB(m, ifp->if_fib); 582a34c6aebSBjoern A. Zeeb 58369462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 584833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 585514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 58669462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 58769462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 588c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 58921ca7b57SMarko Zec if (m == NULL) { 59021ca7b57SMarko Zec CURVNET_RESTORE(); 591e1e1452dSArchie Cobbs return; 592e1e1452dSArchie Cobbs } 5935e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 59421ca7b57SMarko Zec } 595e1e1452dSArchie Cobbs 5968f867517SAndrew Thompson /* 59769462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 59869462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 59969462a82SBruce M Simpson * and the frame should be delivered locally. 6008f867517SAndrew Thompson */ 60169462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 60269462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 603fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 60421ca7b57SMarko Zec if (m == NULL) { 60521ca7b57SMarko Zec CURVNET_RESTORE(); 6068f867517SAndrew Thompson return; 6078f867517SAndrew Thompson } 6085e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 60921ca7b57SMarko Zec } 6108f867517SAndrew Thompson 611259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 61269462a82SBruce M Simpson /* 61369462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 61469462a82SBruce M Simpson * mbuf flows up to Layer 3. 61569462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 61669462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 61769462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 61869462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 61969462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 62069462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 62169462a82SBruce M Simpson */ 62254bfbd51SWill Andrews if (ifp->if_carp && (*carp_forus_p)(ifp, eh->ether_dhost)) { 62369462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 62469462a82SBruce M Simpson } else 62569462a82SBruce M Simpson #endif 62669462a82SBruce M Simpson { 62769462a82SBruce M Simpson /* 628e7f8c833SBruce M Simpson * If the frame received was not for our MAC address, set the 62969462a82SBruce M Simpson * M_PROMISC flag on the mbuf chain. The frame may need to 63069462a82SBruce M Simpson * be seen by the rest of the Ethernet input path in case of 63169462a82SBruce M Simpson * re-entry (e.g. bridge, vlan, netgraph) but should not be 63269462a82SBruce M Simpson * seen by upper protocol layers. 63369462a82SBruce M Simpson */ 63469462a82SBruce M Simpson if (!ETHER_IS_MULTICAST(eh->ether_dhost) && 635e7f8c833SBruce M Simpson bcmp(IF_LLADDR(ifp), eh->ether_dhost, ETHER_ADDR_LEN) != 0) 63669462a82SBruce M Simpson m->m_flags |= M_PROMISC; 63769462a82SBruce M Simpson } 63869462a82SBruce M Simpson 639acf032f5SRobert Watson ether_demux(ifp, m); 64021ca7b57SMarko Zec CURVNET_RESTORE(); 641e1e1452dSArchie Cobbs } 642e1e1452dSArchie Cobbs 643e1e1452dSArchie Cobbs /* 6446cb52192SRobert Watson * Ethernet input dispatch; by default, direct dispatch here regardless of 6457527624eSRobert Watson * global configuration. However, if RSS is enabled, hook up RSS affinity 6467527624eSRobert Watson * so that when deferred or hybrid dispatch is enabled, we can redistribute 6477527624eSRobert Watson * load based on RSS. 6487527624eSRobert Watson * 6497527624eSRobert Watson * XXXRW: Would be nice if the ifnet passed up a flag indicating whether or 6507527624eSRobert Watson * not it had already done work distribution via multi-queue. Then we could 6517527624eSRobert Watson * direct dispatch in the event load balancing was already complete and 6527527624eSRobert Watson * handle the case of interfaces with different capabilities better. 6537527624eSRobert Watson * 6547527624eSRobert Watson * XXXRW: Sort of want an M_DISTRIBUTED flag to avoid multiple distributions 6557527624eSRobert Watson * at multiple layers? 6567527624eSRobert Watson * 6577527624eSRobert Watson * XXXRW: For now, enable all this only if RSS is compiled in, although it 6587527624eSRobert Watson * works fine without RSS. Need to characterise the performance overhead 6597527624eSRobert Watson * of the detour through the netisr code in the event the result is always 6607527624eSRobert Watson * direct dispatch. 6616cb52192SRobert Watson */ 6626cb52192SRobert Watson static void 6636cb52192SRobert Watson ether_nh_input(struct mbuf *m) 6646cb52192SRobert Watson { 6656cb52192SRobert Watson 666b71bed24SAndrey V. Elsukov M_ASSERTPKTHDR(m); 667b71bed24SAndrey V. Elsukov KASSERT(m->m_pkthdr.rcvif != NULL, 668b71bed24SAndrey V. Elsukov ("%s: NULL interface pointer", __func__)); 6696cb52192SRobert Watson ether_input_internal(m->m_pkthdr.rcvif, m); 6706cb52192SRobert Watson } 6716cb52192SRobert Watson 6726cb52192SRobert Watson static struct netisr_handler ether_nh = { 6736cb52192SRobert Watson .nh_name = "ether", 6746cb52192SRobert Watson .nh_handler = ether_nh_input, 6756cb52192SRobert Watson .nh_proto = NETISR_ETHER, 6767527624eSRobert Watson #ifdef RSS 6777527624eSRobert Watson .nh_policy = NETISR_POLICY_CPU, 6787527624eSRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 6797527624eSRobert Watson .nh_m2cpuid = rss_m2cpuid, 6807527624eSRobert Watson #else 6816cb52192SRobert Watson .nh_policy = NETISR_POLICY_SOURCE, 6826cb52192SRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 6837527624eSRobert Watson #endif 6846cb52192SRobert Watson }; 6856cb52192SRobert Watson 6866cb52192SRobert Watson static void 6876cb52192SRobert Watson ether_init(__unused void *arg) 6886cb52192SRobert Watson { 6896cb52192SRobert Watson 6906cb52192SRobert Watson netisr_register(ðer_nh); 6916cb52192SRobert Watson } 6926cb52192SRobert Watson SYSINIT(ether, SI_SUB_INIT_IF, SI_ORDER_ANY, ether_init, NULL); 6936cb52192SRobert Watson 6946cb52192SRobert Watson static void 6957d4317bdSAlexander V. Chernikov vnet_ether_init(__unused void *arg) 6967d4317bdSAlexander V. Chernikov { 6977d4317bdSAlexander V. Chernikov int i; 6987d4317bdSAlexander V. Chernikov 6997d4317bdSAlexander V. Chernikov /* Initialize packet filter hooks. */ 7007d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_type = PFIL_TYPE_AF; 7017d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_af = AF_LINK; 7027d4317bdSAlexander V. Chernikov if ((i = pfil_head_register(&V_link_pfil_hook)) != 0) 7037d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to register pfil link hook, " 7047d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 705484149deSBjoern A. Zeeb #ifdef VIMAGE 706484149deSBjoern A. Zeeb netisr_register_vnet(ðer_nh); 707484149deSBjoern A. Zeeb #endif 7087d4317bdSAlexander V. Chernikov } 7097d4317bdSAlexander V. Chernikov VNET_SYSINIT(vnet_ether_init, SI_SUB_PROTO_IF, SI_ORDER_ANY, 7107d4317bdSAlexander V. Chernikov vnet_ether_init, NULL); 7117d4317bdSAlexander V. Chernikov 712484149deSBjoern A. Zeeb #ifdef VIMAGE 7137d4317bdSAlexander V. Chernikov static void 714484149deSBjoern A. Zeeb vnet_ether_pfil_destroy(__unused void *arg) 7157d4317bdSAlexander V. Chernikov { 7167d4317bdSAlexander V. Chernikov int i; 7177d4317bdSAlexander V. Chernikov 7187d4317bdSAlexander V. Chernikov if ((i = pfil_head_unregister(&V_link_pfil_hook)) != 0) 7197d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to unregister pfil link hook, " 7207d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 7217d4317bdSAlexander V. Chernikov } 722484149deSBjoern A. Zeeb VNET_SYSUNINIT(vnet_ether_pfil_uninit, SI_SUB_PROTO_PFIL, SI_ORDER_ANY, 723484149deSBjoern A. Zeeb vnet_ether_pfil_destroy, NULL); 724484149deSBjoern A. Zeeb 725484149deSBjoern A. Zeeb static void 726484149deSBjoern A. Zeeb vnet_ether_destroy(__unused void *arg) 727484149deSBjoern A. Zeeb { 728484149deSBjoern A. Zeeb 729484149deSBjoern A. Zeeb netisr_unregister_vnet(ðer_nh); 730484149deSBjoern A. Zeeb } 7317d4317bdSAlexander V. Chernikov VNET_SYSUNINIT(vnet_ether_uninit, SI_SUB_PROTO_IF, SI_ORDER_ANY, 7327d4317bdSAlexander V. Chernikov vnet_ether_destroy, NULL); 733484149deSBjoern A. Zeeb #endif 7347d4317bdSAlexander V. Chernikov 7357d4317bdSAlexander V. Chernikov 7367d4317bdSAlexander V. Chernikov 7377d4317bdSAlexander V. Chernikov static void 7386cb52192SRobert Watson ether_input(struct ifnet *ifp, struct mbuf *m) 7396cb52192SRobert Watson { 7406cb52192SRobert Watson 7414857f5fbSGeorge V. Neville-Neil struct mbuf *mn; 7424857f5fbSGeorge V. Neville-Neil 7434857f5fbSGeorge V. Neville-Neil /* 7444857f5fbSGeorge V. Neville-Neil * The drivers are allowed to pass in a chain of packets linked with 7454857f5fbSGeorge V. Neville-Neil * m_nextpkt. We split them up into separate packets here and pass 7464857f5fbSGeorge V. Neville-Neil * them up. This allows the drivers to amortize the receive lock. 7474857f5fbSGeorge V. Neville-Neil */ 7484857f5fbSGeorge V. Neville-Neil while (m) { 7494857f5fbSGeorge V. Neville-Neil mn = m->m_nextpkt; 7504857f5fbSGeorge V. Neville-Neil m->m_nextpkt = NULL; 7514857f5fbSGeorge V. Neville-Neil 7526cb52192SRobert Watson /* 7536cb52192SRobert Watson * We will rely on rcvif being set properly in the deferred context, 7546cb52192SRobert Watson * so assert it is correct here. 7556cb52192SRobert Watson */ 756e84ef07fSBjoern A. Zeeb KASSERT(m->m_pkthdr.rcvif == ifp, ("%s: ifnet mismatch m %p " 757e84ef07fSBjoern A. Zeeb "rcvif %p ifp %p", __func__, m, m->m_pkthdr.rcvif, ifp)); 758484149deSBjoern A. Zeeb CURVNET_SET_QUIET(ifp->if_vnet); 7596cb52192SRobert Watson netisr_dispatch(NETISR_ETHER, m); 760484149deSBjoern A. Zeeb CURVNET_RESTORE(); 7614857f5fbSGeorge V. Neville-Neil m = mn; 7624857f5fbSGeorge V. Neville-Neil } 7636cb52192SRobert Watson } 7646cb52192SRobert Watson 7656cb52192SRobert Watson /* 766e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 767e1e1452dSArchie Cobbs */ 768e1e1452dSArchie Cobbs void 769c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 770e1e1452dSArchie Cobbs { 771c1d93b05SSam Leffler struct ether_header *eh; 7727d4317bdSAlexander V. Chernikov int i, isr; 773e1e1452dSArchie Cobbs u_short ether_type; 77469462a82SBruce M Simpson 77569462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 77669462a82SBruce M Simpson 7777d4317bdSAlexander V. Chernikov /* Do not grab PROMISC frames in case we are re-entered. */ 7787d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook) && !(m->m_flags & M_PROMISC)) { 7797d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_IN, NULL); 7807d4317bdSAlexander V. Chernikov 7817d4317bdSAlexander V. Chernikov if (i != 0 || m == NULL) 7827d4317bdSAlexander V. Chernikov return; 78369462a82SBruce M Simpson } 7847d4317bdSAlexander V. Chernikov 785c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 786cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 787c1d93b05SSam Leffler 788a9771948SGleb Smirnoff /* 78969462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 79069462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 791a9771948SGleb Smirnoff */ 79269462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 79369462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 79475ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 7953751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_NOPROTO, 1); 7966c23e6ccSRuslan Ermilov m_freem(m); 7976c23e6ccSRuslan Ermilov return; 7986c23e6ccSRuslan Ermilov } 79969462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 80069462a82SBruce M Simpson __func__)); 80169462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 80269462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 803c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 804c1d93b05SSam Leffler return; 805c1d93b05SSam Leffler } 806c1d93b05SSam Leffler 807c1d93b05SSam Leffler /* 80869462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 80969462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 810c1d93b05SSam Leffler */ 81169462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 812c1d93b05SSam Leffler m_freem(m); 813c1d93b05SSam Leffler return; 814c1d93b05SSam Leffler } 815c1d93b05SSam Leffler 81669462a82SBruce M Simpson /* 81769462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 81869462a82SBruce M Simpson * Strip off Ethernet header. 81969462a82SBruce M Simpson */ 82069462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 82186bd0491SAndre Oppermann m_clrprotoflags(m); 822797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 823c1d93b05SSam Leffler 82469462a82SBruce M Simpson /* 82569462a82SBruce M Simpson * Dispatch frame to upper layer. 82669462a82SBruce M Simpson */ 827307d80beSDavid Greenman switch (ether_type) { 828df8bae1dSRodney W. Grimes #ifdef INET 829df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 8301cafed39SJonathan Lemon isr = NETISR_IP; 831df8bae1dSRodney W. Grimes break; 832df8bae1dSRodney W. Grimes 833df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 83408aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 83508aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 83608aadfbbSJonathan Lemon m_freem(m); 83708aadfbbSJonathan Lemon return; 83808aadfbbSJonathan Lemon } 8391cafed39SJonathan Lemon isr = NETISR_ARP; 840df8bae1dSRodney W. Grimes break; 841df8bae1dSRodney W. Grimes #endif 84282cd038dSYoshinobu Inoue #ifdef INET6 84382cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 8441cafed39SJonathan Lemon isr = NETISR_IPV6; 84582cd038dSYoshinobu Inoue break; 84682cd038dSYoshinobu Inoue #endif 847df8bae1dSRodney W. Grimes default: 8481cafed39SJonathan Lemon goto discard; 849df8bae1dSRodney W. Grimes } 8501cafed39SJonathan Lemon netisr_dispatch(isr, m); 851c1d93b05SSam Leffler return; 8521cafed39SJonathan Lemon 853c1d93b05SSam Leffler discard: 854c1d93b05SSam Leffler /* 855c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 856c1d93b05SSam Leffler * hand the packet to it for last chance processing; 857c1d93b05SSam Leffler * otherwise dispose of it. 858c1d93b05SSam Leffler */ 859833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 860514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 861514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 862c1d93b05SSam Leffler /* 863c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 864c1d93b05SSam Leffler * consistent view of inbound packets. 865c1d93b05SSam Leffler */ 866eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_HDR_LEN, M_NOWAIT); 867c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 868c1d93b05SSam Leffler return; 869c1d93b05SSam Leffler } 870c1d93b05SSam Leffler m_freem(m); 871c1d93b05SSam Leffler } 872c1d93b05SSam Leffler 873c1d93b05SSam Leffler /* 874c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 875c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 876c1d93b05SSam Leffler * 877c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 878c1d93b05SSam Leffler * 879c1d93b05SSam Leffler * since there's no static buffer involved. 880c1d93b05SSam Leffler */ 881c1d93b05SSam Leffler char * 882c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 883c1d93b05SSam Leffler { 884c1d93b05SSam Leffler static char etherbuf[18]; 885c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 886c1d93b05SSam Leffler return (etherbuf); 887df8bae1dSRodney W. Grimes } 888df8bae1dSRodney W. Grimes 889df8bae1dSRodney W. Grimes /* 890df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 891df8bae1dSRodney W. Grimes */ 892df8bae1dSRodney W. Grimes void 893d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 894df8bae1dSRodney W. Grimes { 895f93dfa28SBrooks Davis int i; 896098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 897098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 898df8bae1dSRodney W. Grimes 899c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 900c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 901cfeff1b6SJonathan Lemon if_attach(ifp); 902df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 903c1d93b05SSam Leffler ifp->if_output = ether_output; 904c1d93b05SSam Leffler ifp->if_input = ether_input; 9051158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 9064fb3a820SAlexander V. Chernikov ifp->if_requestencap = ether_requestencap; 907d3c351c5SMarko Zec #ifdef VIMAGE 908d3c351c5SMarko Zec ifp->if_reassign = ether_reassign; 909d3c351c5SMarko Zec #endif 910a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 911c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 912322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 913c1d93b05SSam Leffler 9144a0d6638SRuslan Ermilov ifa = ifp->if_addr; 9156e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 91659562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 917df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 918df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 919d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 920c1d93b05SSam Leffler 921797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 922e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 923e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 924e3bbbec2SMatthew N. Dodd 925f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 926f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 927d09ed26fSRuslan Ermilov if (lla[i] != 0) 928f93dfa28SBrooks Davis break; 929f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 930d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 931ef1f9169SMarcel Moolenaar 932ef1f9169SMarcel Moolenaar uuid_ether_add(LLADDR(sdl)); 933e1e1452dSArchie Cobbs } 934e1e1452dSArchie Cobbs 93521b8ebd9SArchie Cobbs /* 93621b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 93721b8ebd9SArchie Cobbs */ 93821b8ebd9SArchie Cobbs void 939c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 94021b8ebd9SArchie Cobbs { 941ef1f9169SMarcel Moolenaar struct sockaddr_dl *sdl; 942ef1f9169SMarcel Moolenaar 943ef1f9169SMarcel Moolenaar sdl = (struct sockaddr_dl *)(ifp->if_addr->ifa_addr); 944ef1f9169SMarcel Moolenaar uuid_ether_del(LLADDR(sdl)); 945ef1f9169SMarcel Moolenaar 946833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 947514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 948514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 94921b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 950514bcb89SPoul-Henning Kamp } 95120a65f37SAndrew Thompson 95221b8ebd9SArchie Cobbs bpfdetach(ifp); 95321b8ebd9SArchie Cobbs if_detach(ifp); 95421b8ebd9SArchie Cobbs } 95521b8ebd9SArchie Cobbs 956d3c351c5SMarko Zec #ifdef VIMAGE 957d3c351c5SMarko Zec void 958d3c351c5SMarko Zec ether_reassign(struct ifnet *ifp, struct vnet *new_vnet, char *unused __unused) 959d3c351c5SMarko Zec { 960d3c351c5SMarko Zec 961833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 962d3c351c5SMarko Zec KASSERT(ng_ether_detach_p != NULL, 963d3c351c5SMarko Zec ("ng_ether_detach_p is NULL")); 964d3c351c5SMarko Zec (*ng_ether_detach_p)(ifp); 965d3c351c5SMarko Zec } 966d3c351c5SMarko Zec 967d3c351c5SMarko Zec if (ng_ether_attach_p != NULL) { 968d3c351c5SMarko Zec CURVNET_SET_QUIET(new_vnet); 969d3c351c5SMarko Zec (*ng_ether_attach_p)(ifp); 970d3c351c5SMarko Zec CURVNET_RESTORE(); 971d3c351c5SMarko Zec } 972d3c351c5SMarko Zec } 973d3c351c5SMarko Zec #endif 974d3c351c5SMarko Zec 975ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 976602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 97730106f6aSPoul-Henning Kamp 97816b4a343SChristian Weisgerber #if 0 97916b4a343SChristian Weisgerber /* 98016b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 98116b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 98216b4a343SChristian Weisgerber * than the double-loop. 98316b4a343SChristian Weisgerber */ 98416b4a343SChristian Weisgerber uint32_t 98516b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 98616b4a343SChristian Weisgerber { 98716b4a343SChristian Weisgerber size_t i; 98816b4a343SChristian Weisgerber uint32_t crc; 98916b4a343SChristian Weisgerber int bit; 99016b4a343SChristian Weisgerber uint8_t data; 99116b4a343SChristian Weisgerber 99216b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 99316b4a343SChristian Weisgerber 99416b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 995933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 99616b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 99716b4a343SChristian Weisgerber crc >>= 1; 99816b4a343SChristian Weisgerber if (carry) 99916b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 100016b4a343SChristian Weisgerber } 1001933dad75SAntoine Brodin } 100216b4a343SChristian Weisgerber 100316b4a343SChristian Weisgerber return (crc); 100416b4a343SChristian Weisgerber } 100516b4a343SChristian Weisgerber #else 100616b4a343SChristian Weisgerber uint32_t 100716b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 100816b4a343SChristian Weisgerber { 100916b4a343SChristian Weisgerber static const uint32_t crctab[] = { 101016b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 101116b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 101216b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 101316b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 101416b4a343SChristian Weisgerber }; 101516b4a343SChristian Weisgerber size_t i; 101616b4a343SChristian Weisgerber uint32_t crc; 101716b4a343SChristian Weisgerber 101816b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 101916b4a343SChristian Weisgerber 102016b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 102116b4a343SChristian Weisgerber crc ^= buf[i]; 102216b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 102316b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 102416b4a343SChristian Weisgerber } 102516b4a343SChristian Weisgerber 102616b4a343SChristian Weisgerber return (crc); 102716b4a343SChristian Weisgerber } 102816b4a343SChristian Weisgerber #endif 102916b4a343SChristian Weisgerber 103016b4a343SChristian Weisgerber uint32_t 103116b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 103216b4a343SChristian Weisgerber { 103316b4a343SChristian Weisgerber size_t i; 103416b4a343SChristian Weisgerber uint32_t crc, carry; 103516b4a343SChristian Weisgerber int bit; 103616b4a343SChristian Weisgerber uint8_t data; 103716b4a343SChristian Weisgerber 103816b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 103916b4a343SChristian Weisgerber 104016b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 104116b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 104216b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 104316b4a343SChristian Weisgerber crc <<= 1; 104416b4a343SChristian Weisgerber if (carry) 104516b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 104616b4a343SChristian Weisgerber } 104716b4a343SChristian Weisgerber } 104816b4a343SChristian Weisgerber 104916b4a343SChristian Weisgerber return (crc); 105016b4a343SChristian Weisgerber } 105116b4a343SChristian Weisgerber 1052fb583156SDavid Greenman int 1053995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 105430106f6aSPoul-Henning Kamp { 105530106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 105630106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 1057fb583156SDavid Greenman int error = 0; 105830106f6aSPoul-Henning Kamp 105930106f6aSPoul-Henning Kamp switch (command) { 106030106f6aSPoul-Henning Kamp case SIOCSIFADDR: 106130106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 106230106f6aSPoul-Henning Kamp 106330106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 106430106f6aSPoul-Henning Kamp #ifdef INET 106530106f6aSPoul-Henning Kamp case AF_INET: 106630106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1067322dcb8dSMax Khon arp_ifinit(ifp, ifa); 106830106f6aSPoul-Henning Kamp break; 106930106f6aSPoul-Henning Kamp #endif 107030106f6aSPoul-Henning Kamp default: 107130106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 107230106f6aSPoul-Henning Kamp break; 107330106f6aSPoul-Henning Kamp } 107430106f6aSPoul-Henning Kamp break; 107530106f6aSPoul-Henning Kamp 107630106f6aSPoul-Henning Kamp case SIOCGIFADDR: 107730106f6aSPoul-Henning Kamp { 107830106f6aSPoul-Henning Kamp struct sockaddr *sa; 107930106f6aSPoul-Henning Kamp 108030106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 10814a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 108230106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 108330106f6aSPoul-Henning Kamp } 108430106f6aSPoul-Henning Kamp break; 1085fb583156SDavid Greenman 1086fb583156SDavid Greenman case SIOCSIFMTU: 1087fb583156SDavid Greenman /* 1088fb583156SDavid Greenman * Set the interface MTU. 1089fb583156SDavid Greenman */ 1090fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1091fb583156SDavid Greenman error = EINVAL; 1092fb583156SDavid Greenman } else { 1093fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 109430106f6aSPoul-Henning Kamp } 1095fb583156SDavid Greenman break; 1096c1d93b05SSam Leffler default: 1097c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1098c1d93b05SSam Leffler break; 1099fb583156SDavid Greenman } 1100fb583156SDavid Greenman return (error); 110130106f6aSPoul-Henning Kamp } 11021158dfb7SGarrett Wollman 110337c84183SPoul-Henning Kamp static int 110472fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 110572fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 11061158dfb7SGarrett Wollman { 11071158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1108d7647d96SDag-Erling Smørgrav #ifdef INET 11091158dfb7SGarrett Wollman struct sockaddr_in *sin; 1110d7647d96SDag-Erling Smørgrav #endif 111182cd038dSYoshinobu Inoue #ifdef INET6 111282cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 111382cd038dSYoshinobu Inoue #endif 11141158dfb7SGarrett Wollman u_char *e_addr; 11151158dfb7SGarrett Wollman 11161158dfb7SGarrett Wollman switch(sa->sa_family) { 11171158dfb7SGarrett Wollman case AF_LINK: 11187f33a738SJulian Elischer /* 11197f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 11207f33a738SJulian Elischer */ 11211158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 11221158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1123086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 11241158dfb7SGarrett Wollman return EADDRNOTAVAIL; 1125155d72c4SPedro F. Giffuni *llsa = NULL; 11261158dfb7SGarrett Wollman return 0; 11271158dfb7SGarrett Wollman 11281158dfb7SGarrett Wollman #ifdef INET 11291158dfb7SGarrett Wollman case AF_INET: 11301158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 11311158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 11321158dfb7SGarrett Wollman return EADDRNOTAVAIL; 113395fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 11341158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 11351158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 11361158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 11371158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 11381158dfb7SGarrett Wollman return 0; 11391158dfb7SGarrett Wollman #endif 114082cd038dSYoshinobu Inoue #ifdef INET6 114182cd038dSYoshinobu Inoue case AF_INET6: 114282cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1143595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1144595b8a1cSJun-ichiro itojun Hagino /* 1145595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1146595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1147595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1148595b8a1cSJun-ichiro itojun Hagino */ 1149595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1150155d72c4SPedro F. Giffuni *llsa = NULL; 1151595b8a1cSJun-ichiro itojun Hagino return 0; 1152595b8a1cSJun-ichiro itojun Hagino } 115382cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 115482cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 115595fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 115682cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 115782cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 115882cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 115982cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 116082cd038dSYoshinobu Inoue return 0; 116182cd038dSYoshinobu Inoue #endif 11621158dfb7SGarrett Wollman 11631158dfb7SGarrett Wollman default: 11641158dfb7SGarrett Wollman /* 11651158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 11661158dfb7SGarrett Wollman * that counts... 11671158dfb7SGarrett Wollman */ 11681158dfb7SGarrett Wollman return EAFNOSUPPORT; 11691158dfb7SGarrett Wollman } 11701158dfb7SGarrett Wollman } 117140811c14SMatthew N. Dodd 117240811c14SMatthew N. Dodd static moduledata_t ether_mod = { 1173833e8dc5SGleb Smirnoff .name = "ether", 117440811c14SMatthew N. Dodd }; 117540811c14SMatthew N. Dodd 117652f1277eSChristian S.J. Peron void 117752f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 117852f1277eSChristian S.J. Peron { 117952f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 118052f1277eSChristian S.J. Peron struct mbuf mv, mb; 118152f1277eSChristian S.J. Peron 118252f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 118352f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 118452f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 118552f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 118652f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 118752f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 118852f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 118952f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 119052f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 119152f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 119252f1277eSChristian S.J. Peron /* 119352f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 119452f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 119552f1277eSChristian S.J. Peron * 119652f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 119752f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 119852f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 119952f1277eSChristian S.J. Peron * 120052f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 120152f1277eSChristian S.J. Peron */ 120252f1277eSChristian S.J. Peron if (data != NULL) { 120352f1277eSChristian S.J. Peron mv.m_next = m; 120452f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 120552f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 120652f1277eSChristian S.J. Peron mb.m_next = &mv; 120752f1277eSChristian S.J. Peron mb.m_data = data; 120852f1277eSChristian S.J. Peron mb.m_len = dlen; 120952f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 121052f1277eSChristian S.J. Peron } else 121152f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 121252f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 121352f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 121452f1277eSChristian S.J. Peron } 121552f1277eSChristian S.J. Peron 121660e87ca8SAndrew Thompson struct mbuf * 1217a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 121860e87ca8SAndrew Thompson { 121960e87ca8SAndrew Thompson struct ether_vlan_header *evl; 122060e87ca8SAndrew Thompson 1221eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_NOWAIT); 122260e87ca8SAndrew Thompson if (m == NULL) 122360e87ca8SAndrew Thompson return (NULL); 122460e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 122560e87ca8SAndrew Thompson 122660e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 122760e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 122860e87ca8SAndrew Thompson if (m == NULL) 122960e87ca8SAndrew Thompson return (NULL); 123060e87ca8SAndrew Thompson } 123160e87ca8SAndrew Thompson 123260e87ca8SAndrew Thompson /* 123360e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 123460e87ca8SAndrew Thompson * with 802.1Q encapsulation. 123560e87ca8SAndrew Thompson */ 123660e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 123760e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 123860e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 123960e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 124060e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 124160e87ca8SAndrew Thompson return (m); 124260e87ca8SAndrew Thompson } 124360e87ca8SAndrew Thompson 1244fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 124540811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1246