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, 2024fb3a820SAlexander V. Chernikov uint32_t *pflags) 2034fb3a820SAlexander V. Chernikov { 2044fb3a820SAlexander V. Chernikov struct ether_header *eh; 2054fb3a820SAlexander V. Chernikov struct rtentry *rt; 2064fb3a820SAlexander V. Chernikov uint32_t lleflags = 0; 2074fb3a820SAlexander V. Chernikov int error = 0; 2084fb3a820SAlexander V. Chernikov #if defined(INET) || defined(INET6) 2094fb3a820SAlexander V. Chernikov uint16_t etype; 2104fb3a820SAlexander V. Chernikov #endif 2114fb3a820SAlexander V. Chernikov 2124fb3a820SAlexander V. Chernikov eh = (struct ether_header *)phdr; 2134fb3a820SAlexander V. Chernikov 2144fb3a820SAlexander V. Chernikov switch (dst->sa_family) { 2154fb3a820SAlexander V. Chernikov #ifdef INET 2164fb3a820SAlexander V. Chernikov case AF_INET: 2174fb3a820SAlexander V. Chernikov if ((m->m_flags & (M_BCAST | M_MCAST)) == 0) 2184fb3a820SAlexander V. Chernikov error = arpresolve(ifp, 0, m, dst, phdr, &lleflags); 2194fb3a820SAlexander V. Chernikov else { 2204fb3a820SAlexander V. Chernikov if (m->m_flags & M_BCAST) 2214fb3a820SAlexander V. Chernikov memcpy(eh->ether_dhost, ifp->if_broadcastaddr, 2224fb3a820SAlexander V. Chernikov ETHER_ADDR_LEN); 2234fb3a820SAlexander V. Chernikov else { 2244fb3a820SAlexander V. Chernikov const struct in_addr *a; 2254fb3a820SAlexander V. Chernikov a = &(((const struct sockaddr_in *)dst)->sin_addr); 2264fb3a820SAlexander V. Chernikov ETHER_MAP_IP_MULTICAST(a, eh->ether_dhost); 2274fb3a820SAlexander V. Chernikov } 2284fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_IP); 2294fb3a820SAlexander V. Chernikov memcpy(&eh->ether_type, &etype, sizeof(etype)); 2304fb3a820SAlexander V. Chernikov memcpy(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN); 2314fb3a820SAlexander V. Chernikov } 2324fb3a820SAlexander V. Chernikov break; 2334fb3a820SAlexander V. Chernikov #endif 2344fb3a820SAlexander V. Chernikov #ifdef INET6 2354fb3a820SAlexander V. Chernikov case AF_INET6: 2364fb3a820SAlexander V. Chernikov if ((m->m_flags & M_MCAST) == 0) 2374fb3a820SAlexander V. Chernikov error = nd6_resolve(ifp, 0, m, dst, phdr, &lleflags); 2384fb3a820SAlexander V. Chernikov else { 2394fb3a820SAlexander V. Chernikov const struct in6_addr *a6; 2404fb3a820SAlexander V. Chernikov a6 = &(((const struct sockaddr_in6 *)dst)->sin6_addr); 2414fb3a820SAlexander V. Chernikov ETHER_MAP_IPV6_MULTICAST(a6, eh->ether_dhost); 2424fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_IPV6); 2434fb3a820SAlexander V. Chernikov memcpy(&eh->ether_type, &etype, sizeof(etype)); 2444fb3a820SAlexander V. Chernikov memcpy(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN); 2454fb3a820SAlexander V. Chernikov } 2464fb3a820SAlexander V. Chernikov break; 2474fb3a820SAlexander V. Chernikov #endif 2484fb3a820SAlexander V. Chernikov default: 2494fb3a820SAlexander V. Chernikov if_printf(ifp, "can't handle af%d\n", dst->sa_family); 2504fb3a820SAlexander V. Chernikov if (m != NULL) 2514fb3a820SAlexander V. Chernikov m_freem(m); 2524fb3a820SAlexander V. Chernikov return (EAFNOSUPPORT); 2534fb3a820SAlexander V. Chernikov } 2544fb3a820SAlexander V. Chernikov 2554fb3a820SAlexander V. Chernikov if (error == EHOSTDOWN) { 2564fb3a820SAlexander V. Chernikov rt = (ro != NULL) ? ro->ro_rt : NULL; 2574fb3a820SAlexander V. Chernikov if (rt != NULL && (rt->rt_flags & RTF_GATEWAY) != 0) 2584fb3a820SAlexander V. Chernikov error = EHOSTUNREACH; 2594fb3a820SAlexander V. Chernikov } 2604fb3a820SAlexander V. Chernikov 2614fb3a820SAlexander V. Chernikov if (error != 0) 2624fb3a820SAlexander V. Chernikov return (error); 2634fb3a820SAlexander V. Chernikov 2644fb3a820SAlexander V. Chernikov *pflags = RT_MAY_LOOP; 2654fb3a820SAlexander V. Chernikov if (lleflags & LLE_IFADDR) 2664fb3a820SAlexander V. Chernikov *pflags |= RT_L2_ME; 2674fb3a820SAlexander V. Chernikov 2684fb3a820SAlexander V. Chernikov return (0); 2694fb3a820SAlexander V. Chernikov } 2704fb3a820SAlexander V. Chernikov 2714fb3a820SAlexander V. Chernikov /* 272df8bae1dSRodney W. Grimes * Ethernet output routine. 273df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 274df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 275df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 276df8bae1dSRodney W. Grimes */ 277df8bae1dSRodney W. Grimes int 27872fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 27947e8d432SGleb Smirnoff const struct sockaddr *dst, struct route *ro) 280df8bae1dSRodney W. Grimes { 2814fb3a820SAlexander V. Chernikov int error = 0; 2824fb3a820SAlexander V. Chernikov char linkhdr[ETHER_HDR_LEN], *phdr; 283098a8c3bSMatthew N. Dodd struct ether_header *eh; 28460ee3847SMax Laier struct pf_mtag *t; 285c54c76ccSOleg Bulyzhin int loop_copy = 1; 286d32864c3SRobert Watson int hlen; /* link layer header length */ 2874fb3a820SAlexander V. Chernikov uint32_t pflags; 288df8bae1dSRodney W. Grimes 2894fb3a820SAlexander V. Chernikov phdr = NULL; 2904fb3a820SAlexander V. Chernikov pflags = 0; 291279aa3d4SKip Macy if (ro != NULL) { 2924fb3a820SAlexander V. Chernikov phdr = ro->ro_prepend; 2934fb3a820SAlexander V. Chernikov hlen = ro->ro_plen; 2944fb3a820SAlexander V. Chernikov pflags = ro->ro_flags; 295279aa3d4SKip Macy } 29643b29369SRobert Watson #ifdef MAC 29730d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 29843b29369SRobert Watson if (error) 29943b29369SRobert Watson senderr(error); 30043b29369SRobert Watson #endif 30143b29369SRobert Watson 3026eeac1d9SJulian Elischer M_PROFILE(m); 303afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 304afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 30513f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 30613f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 307df8bae1dSRodney W. Grimes senderr(ENETDOWN); 3087f760c48SMatthew N. Dodd 3094fb3a820SAlexander V. Chernikov if (phdr == NULL) { 3104fb3a820SAlexander V. Chernikov /* No prepend data supplied. Try to calculate ourselves. */ 3114fb3a820SAlexander V. Chernikov phdr = linkhdr; 31284dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 3134fb3a820SAlexander V. Chernikov error = ether_resolve_addr(ifp, m, dst, ro, phdr, &pflags); 3144fb3a820SAlexander V. Chernikov if (error != 0) 315cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 31643a6c75aSMatthew N. Dodd } 31743a6c75aSMatthew N. Dodd 3184fb3a820SAlexander V. Chernikov if ((pflags & RT_L2_ME) != 0) { 31922f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, m); 3206e6b3f7cSQing Li return (if_simloop(ifp, m, dst->sa_family, 0)); 3216e6b3f7cSQing Li } 3224fb3a820SAlexander V. Chernikov loop_copy = pflags & RT_MAY_LOOP; 3236e6b3f7cSQing Li 324df8bae1dSRodney W. Grimes /* 325df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 326df8bae1dSRodney W. Grimes * allocate another. 327df8bae1dSRodney W. Grimes */ 3284fb3a820SAlexander V. Chernikov M_PREPEND(m, hlen, M_NOWAIT); 3292166ffe8SRobert Watson if (m == NULL) 330df8bae1dSRodney W. Grimes senderr(ENOBUFS); 3314fb3a820SAlexander V. Chernikov if ((pflags & RT_HAS_HEADER) == 0) { 332df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 3334fb3a820SAlexander V. Chernikov memcpy(eh, phdr, hlen); 334c69aeaadSAlexander V. Chernikov } 335ed7509acSJulian Elischer 336ed7509acSJulian Elischer /* 337ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 338ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 339ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 340ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 341ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 342ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 343ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 344ed7509acSJulian Elischer */ 3454fb3a820SAlexander V. Chernikov if ((m->m_flags & M_BCAST) && loop_copy && (ifp->if_flags & IFF_SIMPLEX) && 34660ee3847SMax Laier ((t = pf_find_mtag(m)) == NULL || !t->routed)) { 34706f684b0SMatthew N. Dodd struct mbuf *n; 348ed7509acSJulian Elischer 349294dd290SLuigi Rizzo /* 350294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 351294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 352294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 353294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 354294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 355294dd290SLuigi Rizzo * extra data copying vs. extra locking). 3569983b3c0SYaroslav Tykhiy * 3579983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 3589983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 3599983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 360294dd290SLuigi Rizzo */ 361eb1b1807SGleb Smirnoff if ((n = m_dup(m, M_NOWAIT)) != NULL) { 36222f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, n); 36306a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 364c1404dc0SArchie Cobbs } else 3653751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 366ed7509acSJulian Elischer } 3672e2de7f2SArchie Cobbs 3683f7d1396SAndrew Thompson /* 3693f7d1396SAndrew Thompson * Bridges require special output handling. 3703f7d1396SAndrew Thompson */ 3713f7d1396SAndrew Thompson if (ifp->if_bridge) { 3723f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 3733f7d1396SAndrew Thompson return (error); 3743f7d1396SAndrew Thompson } 3753f7d1396SAndrew Thompson 376259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 377a9771948SGleb Smirnoff if (ifp->if_carp && 37808b68b0eSGleb Smirnoff (error = (*carp_output_p)(ifp, m, dst))) 379a9771948SGleb Smirnoff goto bad; 380a9771948SGleb Smirnoff #endif 381a9771948SGleb Smirnoff 382e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 383833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 384514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 385514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 386e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 387e1e1452dSArchie Cobbs bad: if (m != NULL) 388e1e1452dSArchie Cobbs m_freem(m); 389e1e1452dSArchie Cobbs return (error); 390e1e1452dSArchie Cobbs } 391e1e1452dSArchie Cobbs if (m == NULL) 392e1e1452dSArchie Cobbs return (0); 393e1e1452dSArchie Cobbs } 394e1e1452dSArchie Cobbs 395e1e1452dSArchie Cobbs /* Continue with link-layer output */ 396e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 397e1e1452dSArchie Cobbs } 398e1e1452dSArchie Cobbs 399e1e1452dSArchie Cobbs /* 400e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 401e1e1452dSArchie Cobbs * 402e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 403e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 404e1e1452dSArchie Cobbs */ 405e1e1452dSArchie Cobbs int 406c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 407e1e1452dSArchie Cobbs { 4087d4317bdSAlexander V. Chernikov int i; 4092b25acc1SLuigi Rizzo 4107d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook)) { 4117d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_OUT, NULL); 4127d4317bdSAlexander V. Chernikov 4137d4317bdSAlexander V. Chernikov if (i != 0) 4147d4317bdSAlexander V. Chernikov return (EACCES); 4157d4317bdSAlexander V. Chernikov 4167d4317bdSAlexander V. Chernikov if (m == NULL) 4177d4317bdSAlexander V. Chernikov return (0); 4184b984093SLuigi Rizzo } 4192b25acc1SLuigi Rizzo 420df8bae1dSRodney W. Grimes /* 421df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 422df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 423df8bae1dSRodney W. Grimes */ 424aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 425df8bae1dSRodney W. Grimes } 426df8bae1dSRodney W. Grimes 427d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 428d7647d96SDag-Erling Smørgrav #endif 4294b984093SLuigi Rizzo 4304b984093SLuigi Rizzo /* 431c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 432c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 433df8bae1dSRodney W. Grimes */ 434c1d93b05SSam Leffler static void 4356cb52192SRobert Watson ether_input_internal(struct ifnet *ifp, struct mbuf *m) 436df8bae1dSRodney W. Grimes { 437c1d93b05SSam Leffler struct ether_header *eh; 438c1d93b05SSam Leffler u_short etype; 439df8bae1dSRodney W. Grimes 44069462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 44169462a82SBruce M Simpson m_freem(m); 44269462a82SBruce M Simpson return; 44369462a82SBruce M Simpson } 44469462a82SBruce M Simpson #ifdef DIAGNOSTIC 44569462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 44669462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 44769462a82SBruce M Simpson m_freem(m); 44869462a82SBruce M Simpson return; 44969462a82SBruce M Simpson } 45069462a82SBruce M Simpson #endif 451797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 452c1d93b05SSam Leffler /* XXX maybe should pullup? */ 453c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 454c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 455c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 4563751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 457c1d93b05SSam Leffler m_freem(m); 458c1d93b05SSam Leffler return; 4592e2de7f2SArchie Cobbs } 460c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 461c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 462d1b06863SMark Murray random_harvest_queue(m, sizeof(*m), 2, RANDOM_NET_ETHER); 463d1b06863SMark Murray 46421ca7b57SMarko Zec CURVNET_SET_QUIET(ifp->if_vnet); 46521ca7b57SMarko Zec 46669462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 46769462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 46869462a82SBruce M Simpson m->m_flags |= M_BCAST; 46969462a82SBruce M Simpson else 47069462a82SBruce M Simpson m->m_flags |= M_MCAST; 4713751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1); 47269462a82SBruce M Simpson } 47369462a82SBruce M Simpson 474533d8562SRobert Watson #ifdef MAC 475533d8562SRobert Watson /* 476533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 477533d8562SRobert Watson * consumers can get to it. 478533d8562SRobert Watson */ 47930d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 480533d8562SRobert Watson #endif 481533d8562SRobert Watson 482c1d93b05SSam Leffler /* 48369462a82SBruce M Simpson * Give bpf a chance at the packet. 484c1d93b05SSam Leffler */ 485d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 4862e2de7f2SArchie Cobbs 48769462a82SBruce M Simpson /* 48869462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 48969462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 49069462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 49169462a82SBruce M Simpson */ 492c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 493c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 494c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 495c1d93b05SSam Leffler } 496c1d93b05SSam Leffler 4974cdc1f54SGleb Smirnoff if (!(ifp->if_capenable & IFCAP_HWSTATS)) 4983751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 49905463bb5SDavid Greenman 50069462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 501de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 502de572b37SChristian S.J. Peron m_freem(m); 50321ca7b57SMarko Zec CURVNET_RESTORE(); 504de572b37SChristian S.J. Peron return; 505de572b37SChristian S.J. Peron } 506de572b37SChristian S.J. Peron 50718242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 508b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 50918242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 51018242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 51118242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 512b47888ceSAndrew Thompson if (m != NULL) 513b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 5142db13e75SMarko Zec else { 5152db13e75SMarko Zec CURVNET_RESTORE(); 516b47888ceSAndrew Thompson return; 517b47888ceSAndrew Thompson } 5182db13e75SMarko Zec } 519b47888ceSAndrew Thompson 52069462a82SBruce M Simpson /* 52169462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 52269462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 52369462a82SBruce M Simpson * path correctly. 52469462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 52569462a82SBruce M Simpson */ 52669462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 52769462a82SBruce M Simpson struct ether_vlan_header *evl; 52869462a82SBruce M Simpson 52969462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 53069462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 531402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 53269462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 533402d5e27SBruce M Simpson #endif 5343751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 5352db13e75SMarko Zec CURVNET_RESTORE(); 53669462a82SBruce M Simpson return; 53769462a82SBruce M Simpson } 53869462a82SBruce M Simpson 53969462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 54069462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 54169462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 54269462a82SBruce M Simpson 54369462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 54469462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 54569462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 54697cce87fSGleb Smirnoff eh = mtod(m, struct ether_header *); 54769462a82SBruce M Simpson } 54869462a82SBruce M Simpson 549a34c6aebSBjoern A. Zeeb M_SETFIB(m, ifp->if_fib); 550a34c6aebSBjoern A. Zeeb 55169462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 552833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 553514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 55469462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 55569462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 556c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 55721ca7b57SMarko Zec if (m == NULL) { 55821ca7b57SMarko Zec CURVNET_RESTORE(); 559e1e1452dSArchie Cobbs return; 560e1e1452dSArchie Cobbs } 5615e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 56221ca7b57SMarko Zec } 563e1e1452dSArchie Cobbs 5648f867517SAndrew Thompson /* 56569462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 56669462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 56769462a82SBruce M Simpson * and the frame should be delivered locally. 5688f867517SAndrew Thompson */ 56969462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 57069462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 571fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 57221ca7b57SMarko Zec if (m == NULL) { 57321ca7b57SMarko Zec CURVNET_RESTORE(); 5748f867517SAndrew Thompson return; 5758f867517SAndrew Thompson } 5765e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 57721ca7b57SMarko Zec } 5788f867517SAndrew Thompson 579259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 58069462a82SBruce M Simpson /* 58169462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 58269462a82SBruce M Simpson * mbuf flows up to Layer 3. 58369462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 58469462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 58569462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 58669462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 58769462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 58869462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 58969462a82SBruce M Simpson */ 59054bfbd51SWill Andrews if (ifp->if_carp && (*carp_forus_p)(ifp, eh->ether_dhost)) { 59169462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 59269462a82SBruce M Simpson } else 59369462a82SBruce M Simpson #endif 59469462a82SBruce M Simpson { 59569462a82SBruce M Simpson /* 596e7f8c833SBruce M Simpson * If the frame received was not for our MAC address, set the 59769462a82SBruce M Simpson * M_PROMISC flag on the mbuf chain. The frame may need to 59869462a82SBruce M Simpson * be seen by the rest of the Ethernet input path in case of 59969462a82SBruce M Simpson * re-entry (e.g. bridge, vlan, netgraph) but should not be 60069462a82SBruce M Simpson * seen by upper protocol layers. 60169462a82SBruce M Simpson */ 60269462a82SBruce M Simpson if (!ETHER_IS_MULTICAST(eh->ether_dhost) && 603e7f8c833SBruce M Simpson bcmp(IF_LLADDR(ifp), eh->ether_dhost, ETHER_ADDR_LEN) != 0) 60469462a82SBruce M Simpson m->m_flags |= M_PROMISC; 60569462a82SBruce M Simpson } 60669462a82SBruce M Simpson 607acf032f5SRobert Watson ether_demux(ifp, m); 60821ca7b57SMarko Zec CURVNET_RESTORE(); 609e1e1452dSArchie Cobbs } 610e1e1452dSArchie Cobbs 611e1e1452dSArchie Cobbs /* 6126cb52192SRobert Watson * Ethernet input dispatch; by default, direct dispatch here regardless of 6137527624eSRobert Watson * global configuration. However, if RSS is enabled, hook up RSS affinity 6147527624eSRobert Watson * so that when deferred or hybrid dispatch is enabled, we can redistribute 6157527624eSRobert Watson * load based on RSS. 6167527624eSRobert Watson * 6177527624eSRobert Watson * XXXRW: Would be nice if the ifnet passed up a flag indicating whether or 6187527624eSRobert Watson * not it had already done work distribution via multi-queue. Then we could 6197527624eSRobert Watson * direct dispatch in the event load balancing was already complete and 6207527624eSRobert Watson * handle the case of interfaces with different capabilities better. 6217527624eSRobert Watson * 6227527624eSRobert Watson * XXXRW: Sort of want an M_DISTRIBUTED flag to avoid multiple distributions 6237527624eSRobert Watson * at multiple layers? 6247527624eSRobert Watson * 6257527624eSRobert Watson * XXXRW: For now, enable all this only if RSS is compiled in, although it 6267527624eSRobert Watson * works fine without RSS. Need to characterise the performance overhead 6277527624eSRobert Watson * of the detour through the netisr code in the event the result is always 6287527624eSRobert Watson * direct dispatch. 6296cb52192SRobert Watson */ 6306cb52192SRobert Watson static void 6316cb52192SRobert Watson ether_nh_input(struct mbuf *m) 6326cb52192SRobert Watson { 6336cb52192SRobert Watson 634b71bed24SAndrey V. Elsukov M_ASSERTPKTHDR(m); 635b71bed24SAndrey V. Elsukov KASSERT(m->m_pkthdr.rcvif != NULL, 636b71bed24SAndrey V. Elsukov ("%s: NULL interface pointer", __func__)); 6376cb52192SRobert Watson ether_input_internal(m->m_pkthdr.rcvif, m); 6386cb52192SRobert Watson } 6396cb52192SRobert Watson 6406cb52192SRobert Watson static struct netisr_handler ether_nh = { 6416cb52192SRobert Watson .nh_name = "ether", 6426cb52192SRobert Watson .nh_handler = ether_nh_input, 6436cb52192SRobert Watson .nh_proto = NETISR_ETHER, 6447527624eSRobert Watson #ifdef RSS 6457527624eSRobert Watson .nh_policy = NETISR_POLICY_CPU, 6467527624eSRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 6477527624eSRobert Watson .nh_m2cpuid = rss_m2cpuid, 6487527624eSRobert Watson #else 6496cb52192SRobert Watson .nh_policy = NETISR_POLICY_SOURCE, 6506cb52192SRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 6517527624eSRobert Watson #endif 6526cb52192SRobert Watson }; 6536cb52192SRobert Watson 6546cb52192SRobert Watson static void 6556cb52192SRobert Watson ether_init(__unused void *arg) 6566cb52192SRobert Watson { 6576cb52192SRobert Watson 6586cb52192SRobert Watson netisr_register(ðer_nh); 6596cb52192SRobert Watson } 6606cb52192SRobert Watson SYSINIT(ether, SI_SUB_INIT_IF, SI_ORDER_ANY, ether_init, NULL); 6616cb52192SRobert Watson 6626cb52192SRobert Watson static void 6637d4317bdSAlexander V. Chernikov vnet_ether_init(__unused void *arg) 6647d4317bdSAlexander V. Chernikov { 6657d4317bdSAlexander V. Chernikov int i; 6667d4317bdSAlexander V. Chernikov 6677d4317bdSAlexander V. Chernikov /* Initialize packet filter hooks. */ 6687d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_type = PFIL_TYPE_AF; 6697d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_af = AF_LINK; 6707d4317bdSAlexander V. Chernikov if ((i = pfil_head_register(&V_link_pfil_hook)) != 0) 6717d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to register pfil link hook, " 6727d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 6737d4317bdSAlexander V. Chernikov } 6747d4317bdSAlexander V. Chernikov VNET_SYSINIT(vnet_ether_init, SI_SUB_PROTO_IF, SI_ORDER_ANY, 6757d4317bdSAlexander V. Chernikov vnet_ether_init, NULL); 6767d4317bdSAlexander V. Chernikov 6777d4317bdSAlexander V. Chernikov static void 6787d4317bdSAlexander V. Chernikov vnet_ether_destroy(__unused void *arg) 6797d4317bdSAlexander V. Chernikov { 6807d4317bdSAlexander V. Chernikov int i; 6817d4317bdSAlexander V. Chernikov 6827d4317bdSAlexander V. Chernikov if ((i = pfil_head_unregister(&V_link_pfil_hook)) != 0) 6837d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to unregister pfil link hook, " 6847d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 6857d4317bdSAlexander V. Chernikov } 6867d4317bdSAlexander V. Chernikov VNET_SYSUNINIT(vnet_ether_uninit, SI_SUB_PROTO_IF, SI_ORDER_ANY, 6877d4317bdSAlexander V. Chernikov vnet_ether_destroy, NULL); 6887d4317bdSAlexander V. Chernikov 6897d4317bdSAlexander V. Chernikov 6907d4317bdSAlexander V. Chernikov 6917d4317bdSAlexander V. Chernikov static void 6926cb52192SRobert Watson ether_input(struct ifnet *ifp, struct mbuf *m) 6936cb52192SRobert Watson { 6946cb52192SRobert Watson 6954857f5fbSGeorge V. Neville-Neil struct mbuf *mn; 6964857f5fbSGeorge V. Neville-Neil 6974857f5fbSGeorge V. Neville-Neil /* 6984857f5fbSGeorge V. Neville-Neil * The drivers are allowed to pass in a chain of packets linked with 6994857f5fbSGeorge V. Neville-Neil * m_nextpkt. We split them up into separate packets here and pass 7004857f5fbSGeorge V. Neville-Neil * them up. This allows the drivers to amortize the receive lock. 7014857f5fbSGeorge V. Neville-Neil */ 7024857f5fbSGeorge V. Neville-Neil while (m) { 7034857f5fbSGeorge V. Neville-Neil mn = m->m_nextpkt; 7044857f5fbSGeorge V. Neville-Neil m->m_nextpkt = NULL; 7054857f5fbSGeorge V. Neville-Neil 7066cb52192SRobert Watson /* 7076cb52192SRobert Watson * We will rely on rcvif being set properly in the deferred context, 7086cb52192SRobert Watson * so assert it is correct here. 7096cb52192SRobert Watson */ 7106cb52192SRobert Watson KASSERT(m->m_pkthdr.rcvif == ifp, ("%s: ifnet mismatch", __func__)); 7116cb52192SRobert Watson netisr_dispatch(NETISR_ETHER, m); 7124857f5fbSGeorge V. Neville-Neil m = mn; 7134857f5fbSGeorge V. Neville-Neil } 7146cb52192SRobert Watson } 7156cb52192SRobert Watson 7166cb52192SRobert Watson /* 717e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 718e1e1452dSArchie Cobbs */ 719e1e1452dSArchie Cobbs void 720c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 721e1e1452dSArchie Cobbs { 722c1d93b05SSam Leffler struct ether_header *eh; 7237d4317bdSAlexander V. Chernikov int i, isr; 724e1e1452dSArchie Cobbs u_short ether_type; 72569462a82SBruce M Simpson 72669462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 72769462a82SBruce M Simpson 7287d4317bdSAlexander V. Chernikov /* Do not grab PROMISC frames in case we are re-entered. */ 7297d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook) && !(m->m_flags & M_PROMISC)) { 7307d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_IN, NULL); 7317d4317bdSAlexander V. Chernikov 7327d4317bdSAlexander V. Chernikov if (i != 0 || m == NULL) 7337d4317bdSAlexander V. Chernikov return; 73469462a82SBruce M Simpson } 7357d4317bdSAlexander V. Chernikov 736c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 737cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 738c1d93b05SSam Leffler 739a9771948SGleb Smirnoff /* 74069462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 74169462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 742a9771948SGleb Smirnoff */ 74369462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 74469462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 74575ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 7463751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_NOPROTO, 1); 7476c23e6ccSRuslan Ermilov m_freem(m); 7486c23e6ccSRuslan Ermilov return; 7496c23e6ccSRuslan Ermilov } 75069462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 75169462a82SBruce M Simpson __func__)); 75269462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 75369462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 754c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 755c1d93b05SSam Leffler return; 756c1d93b05SSam Leffler } 757c1d93b05SSam Leffler 758c1d93b05SSam Leffler /* 75969462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 76069462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 761c1d93b05SSam Leffler */ 76269462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 763c1d93b05SSam Leffler m_freem(m); 764c1d93b05SSam Leffler return; 765c1d93b05SSam Leffler } 766c1d93b05SSam Leffler 76769462a82SBruce M Simpson /* 76869462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 76969462a82SBruce M Simpson * Strip off Ethernet header. 77069462a82SBruce M Simpson */ 77169462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 77286bd0491SAndre Oppermann m_clrprotoflags(m); 773797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 774c1d93b05SSam Leffler 77569462a82SBruce M Simpson /* 77669462a82SBruce M Simpson * Dispatch frame to upper layer. 77769462a82SBruce M Simpson */ 778307d80beSDavid Greenman switch (ether_type) { 779df8bae1dSRodney W. Grimes #ifdef INET 780df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 7811cafed39SJonathan Lemon isr = NETISR_IP; 782df8bae1dSRodney W. Grimes break; 783df8bae1dSRodney W. Grimes 784df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 78508aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 78608aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 78708aadfbbSJonathan Lemon m_freem(m); 78808aadfbbSJonathan Lemon return; 78908aadfbbSJonathan Lemon } 7901cafed39SJonathan Lemon isr = NETISR_ARP; 791df8bae1dSRodney W. Grimes break; 792df8bae1dSRodney W. Grimes #endif 79382cd038dSYoshinobu Inoue #ifdef INET6 79482cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 7951cafed39SJonathan Lemon isr = NETISR_IPV6; 79682cd038dSYoshinobu Inoue break; 79782cd038dSYoshinobu Inoue #endif 798df8bae1dSRodney W. Grimes default: 7991cafed39SJonathan Lemon goto discard; 800df8bae1dSRodney W. Grimes } 8011cafed39SJonathan Lemon netisr_dispatch(isr, m); 802c1d93b05SSam Leffler return; 8031cafed39SJonathan Lemon 804c1d93b05SSam Leffler discard: 805c1d93b05SSam Leffler /* 806c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 807c1d93b05SSam Leffler * hand the packet to it for last chance processing; 808c1d93b05SSam Leffler * otherwise dispose of it. 809c1d93b05SSam Leffler */ 810833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 811514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 812514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 813c1d93b05SSam Leffler /* 814c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 815c1d93b05SSam Leffler * consistent view of inbound packets. 816c1d93b05SSam Leffler */ 817eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_HDR_LEN, M_NOWAIT); 818c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 819c1d93b05SSam Leffler return; 820c1d93b05SSam Leffler } 821c1d93b05SSam Leffler m_freem(m); 822c1d93b05SSam Leffler } 823c1d93b05SSam Leffler 824c1d93b05SSam Leffler /* 825c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 826c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 827c1d93b05SSam Leffler * 828c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 829c1d93b05SSam Leffler * 830c1d93b05SSam Leffler * since there's no static buffer involved. 831c1d93b05SSam Leffler */ 832c1d93b05SSam Leffler char * 833c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 834c1d93b05SSam Leffler { 835c1d93b05SSam Leffler static char etherbuf[18]; 836c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 837c1d93b05SSam Leffler return (etherbuf); 838df8bae1dSRodney W. Grimes } 839df8bae1dSRodney W. Grimes 840df8bae1dSRodney W. Grimes /* 841df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 842df8bae1dSRodney W. Grimes */ 843df8bae1dSRodney W. Grimes void 844d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 845df8bae1dSRodney W. Grimes { 846f93dfa28SBrooks Davis int i; 847098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 848098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 849df8bae1dSRodney W. Grimes 850c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 851c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 852cfeff1b6SJonathan Lemon if_attach(ifp); 853df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 854c1d93b05SSam Leffler ifp->if_output = ether_output; 855c1d93b05SSam Leffler ifp->if_input = ether_input; 8561158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 8574fb3a820SAlexander V. Chernikov ifp->if_requestencap = ether_requestencap; 858d3c351c5SMarko Zec #ifdef VIMAGE 859d3c351c5SMarko Zec ifp->if_reassign = ether_reassign; 860d3c351c5SMarko Zec #endif 861a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 862c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 863322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 864c1d93b05SSam Leffler 8654a0d6638SRuslan Ermilov ifa = ifp->if_addr; 8666e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 86759562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 868df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 869df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 870d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 871c1d93b05SSam Leffler 872797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 873e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 874e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 875e3bbbec2SMatthew N. Dodd 876f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 877f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 878d09ed26fSRuslan Ermilov if (lla[i] != 0) 879f93dfa28SBrooks Davis break; 880f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 881d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 882ef1f9169SMarcel Moolenaar 883ef1f9169SMarcel Moolenaar uuid_ether_add(LLADDR(sdl)); 884e1e1452dSArchie Cobbs } 885e1e1452dSArchie Cobbs 88621b8ebd9SArchie Cobbs /* 88721b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 88821b8ebd9SArchie Cobbs */ 88921b8ebd9SArchie Cobbs void 890c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 89121b8ebd9SArchie Cobbs { 892ef1f9169SMarcel Moolenaar struct sockaddr_dl *sdl; 893ef1f9169SMarcel Moolenaar 894ef1f9169SMarcel Moolenaar sdl = (struct sockaddr_dl *)(ifp->if_addr->ifa_addr); 895ef1f9169SMarcel Moolenaar uuid_ether_del(LLADDR(sdl)); 896ef1f9169SMarcel Moolenaar 897833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 898514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 899514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 90021b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 901514bcb89SPoul-Henning Kamp } 90220a65f37SAndrew Thompson 90321b8ebd9SArchie Cobbs bpfdetach(ifp); 90421b8ebd9SArchie Cobbs if_detach(ifp); 90521b8ebd9SArchie Cobbs } 90621b8ebd9SArchie Cobbs 907d3c351c5SMarko Zec #ifdef VIMAGE 908d3c351c5SMarko Zec void 909d3c351c5SMarko Zec ether_reassign(struct ifnet *ifp, struct vnet *new_vnet, char *unused __unused) 910d3c351c5SMarko Zec { 911d3c351c5SMarko Zec 912833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 913d3c351c5SMarko Zec KASSERT(ng_ether_detach_p != NULL, 914d3c351c5SMarko Zec ("ng_ether_detach_p is NULL")); 915d3c351c5SMarko Zec (*ng_ether_detach_p)(ifp); 916d3c351c5SMarko Zec } 917d3c351c5SMarko Zec 918d3c351c5SMarko Zec if (ng_ether_attach_p != NULL) { 919d3c351c5SMarko Zec CURVNET_SET_QUIET(new_vnet); 920d3c351c5SMarko Zec (*ng_ether_attach_p)(ifp); 921d3c351c5SMarko Zec CURVNET_RESTORE(); 922d3c351c5SMarko Zec } 923d3c351c5SMarko Zec } 924d3c351c5SMarko Zec #endif 925d3c351c5SMarko Zec 926ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 927602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 92830106f6aSPoul-Henning Kamp 92916b4a343SChristian Weisgerber #if 0 93016b4a343SChristian Weisgerber /* 93116b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 93216b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 93316b4a343SChristian Weisgerber * than the double-loop. 93416b4a343SChristian Weisgerber */ 93516b4a343SChristian Weisgerber uint32_t 93616b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 93716b4a343SChristian Weisgerber { 93816b4a343SChristian Weisgerber size_t i; 93916b4a343SChristian Weisgerber uint32_t crc; 94016b4a343SChristian Weisgerber int bit; 94116b4a343SChristian Weisgerber uint8_t data; 94216b4a343SChristian Weisgerber 94316b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 94416b4a343SChristian Weisgerber 94516b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 946933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 94716b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 94816b4a343SChristian Weisgerber crc >>= 1; 94916b4a343SChristian Weisgerber if (carry) 95016b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 95116b4a343SChristian Weisgerber } 952933dad75SAntoine Brodin } 95316b4a343SChristian Weisgerber 95416b4a343SChristian Weisgerber return (crc); 95516b4a343SChristian Weisgerber } 95616b4a343SChristian Weisgerber #else 95716b4a343SChristian Weisgerber uint32_t 95816b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 95916b4a343SChristian Weisgerber { 96016b4a343SChristian Weisgerber static const uint32_t crctab[] = { 96116b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 96216b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 96316b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 96416b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 96516b4a343SChristian Weisgerber }; 96616b4a343SChristian Weisgerber size_t i; 96716b4a343SChristian Weisgerber uint32_t crc; 96816b4a343SChristian Weisgerber 96916b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 97016b4a343SChristian Weisgerber 97116b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 97216b4a343SChristian Weisgerber crc ^= buf[i]; 97316b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 97416b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 97516b4a343SChristian Weisgerber } 97616b4a343SChristian Weisgerber 97716b4a343SChristian Weisgerber return (crc); 97816b4a343SChristian Weisgerber } 97916b4a343SChristian Weisgerber #endif 98016b4a343SChristian Weisgerber 98116b4a343SChristian Weisgerber uint32_t 98216b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 98316b4a343SChristian Weisgerber { 98416b4a343SChristian Weisgerber size_t i; 98516b4a343SChristian Weisgerber uint32_t crc, carry; 98616b4a343SChristian Weisgerber int bit; 98716b4a343SChristian Weisgerber uint8_t data; 98816b4a343SChristian Weisgerber 98916b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 99016b4a343SChristian Weisgerber 99116b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 99216b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 99316b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 99416b4a343SChristian Weisgerber crc <<= 1; 99516b4a343SChristian Weisgerber if (carry) 99616b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 99716b4a343SChristian Weisgerber } 99816b4a343SChristian Weisgerber } 99916b4a343SChristian Weisgerber 100016b4a343SChristian Weisgerber return (crc); 100116b4a343SChristian Weisgerber } 100216b4a343SChristian Weisgerber 1003fb583156SDavid Greenman int 1004995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 100530106f6aSPoul-Henning Kamp { 100630106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 100730106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 1008fb583156SDavid Greenman int error = 0; 100930106f6aSPoul-Henning Kamp 101030106f6aSPoul-Henning Kamp switch (command) { 101130106f6aSPoul-Henning Kamp case SIOCSIFADDR: 101230106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 101330106f6aSPoul-Henning Kamp 101430106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 101530106f6aSPoul-Henning Kamp #ifdef INET 101630106f6aSPoul-Henning Kamp case AF_INET: 101730106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1018322dcb8dSMax Khon arp_ifinit(ifp, ifa); 101930106f6aSPoul-Henning Kamp break; 102030106f6aSPoul-Henning Kamp #endif 102130106f6aSPoul-Henning Kamp default: 102230106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 102330106f6aSPoul-Henning Kamp break; 102430106f6aSPoul-Henning Kamp } 102530106f6aSPoul-Henning Kamp break; 102630106f6aSPoul-Henning Kamp 102730106f6aSPoul-Henning Kamp case SIOCGIFADDR: 102830106f6aSPoul-Henning Kamp { 102930106f6aSPoul-Henning Kamp struct sockaddr *sa; 103030106f6aSPoul-Henning Kamp 103130106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 10324a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 103330106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 103430106f6aSPoul-Henning Kamp } 103530106f6aSPoul-Henning Kamp break; 1036fb583156SDavid Greenman 1037fb583156SDavid Greenman case SIOCSIFMTU: 1038fb583156SDavid Greenman /* 1039fb583156SDavid Greenman * Set the interface MTU. 1040fb583156SDavid Greenman */ 1041fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1042fb583156SDavid Greenman error = EINVAL; 1043fb583156SDavid Greenman } else { 1044fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 104530106f6aSPoul-Henning Kamp } 1046fb583156SDavid Greenman break; 1047c1d93b05SSam Leffler default: 1048c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1049c1d93b05SSam Leffler break; 1050fb583156SDavid Greenman } 1051fb583156SDavid Greenman return (error); 105230106f6aSPoul-Henning Kamp } 10531158dfb7SGarrett Wollman 105437c84183SPoul-Henning Kamp static int 105572fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 105672fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 10571158dfb7SGarrett Wollman { 10581158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1059d7647d96SDag-Erling Smørgrav #ifdef INET 10601158dfb7SGarrett Wollman struct sockaddr_in *sin; 1061d7647d96SDag-Erling Smørgrav #endif 106282cd038dSYoshinobu Inoue #ifdef INET6 106382cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 106482cd038dSYoshinobu Inoue #endif 10651158dfb7SGarrett Wollman u_char *e_addr; 10661158dfb7SGarrett Wollman 10671158dfb7SGarrett Wollman switch(sa->sa_family) { 10681158dfb7SGarrett Wollman case AF_LINK: 10697f33a738SJulian Elischer /* 10707f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 10717f33a738SJulian Elischer */ 10721158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 10731158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1074086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 10751158dfb7SGarrett Wollman return EADDRNOTAVAIL; 10761158dfb7SGarrett Wollman *llsa = 0; 10771158dfb7SGarrett Wollman return 0; 10781158dfb7SGarrett Wollman 10791158dfb7SGarrett Wollman #ifdef INET 10801158dfb7SGarrett Wollman case AF_INET: 10811158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 10821158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 10831158dfb7SGarrett Wollman return EADDRNOTAVAIL; 108495fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 10851158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 10861158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 10871158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 10881158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 10891158dfb7SGarrett Wollman return 0; 10901158dfb7SGarrett Wollman #endif 109182cd038dSYoshinobu Inoue #ifdef INET6 109282cd038dSYoshinobu Inoue case AF_INET6: 109382cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1094595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1095595b8a1cSJun-ichiro itojun Hagino /* 1096595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1097595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1098595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1099595b8a1cSJun-ichiro itojun Hagino */ 1100595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1101595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1102595b8a1cSJun-ichiro itojun Hagino return 0; 1103595b8a1cSJun-ichiro itojun Hagino } 110482cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 110582cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 110695fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 110782cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 110882cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 110982cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 111082cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 111182cd038dSYoshinobu Inoue return 0; 111282cd038dSYoshinobu Inoue #endif 11131158dfb7SGarrett Wollman 11141158dfb7SGarrett Wollman default: 11151158dfb7SGarrett Wollman /* 11161158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 11171158dfb7SGarrett Wollman * that counts... 11181158dfb7SGarrett Wollman */ 11191158dfb7SGarrett Wollman return EAFNOSUPPORT; 11201158dfb7SGarrett Wollman } 11211158dfb7SGarrett Wollman } 112240811c14SMatthew N. Dodd 112340811c14SMatthew N. Dodd static moduledata_t ether_mod = { 1124833e8dc5SGleb Smirnoff .name = "ether", 112540811c14SMatthew N. Dodd }; 112640811c14SMatthew N. Dodd 112752f1277eSChristian S.J. Peron void 112852f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 112952f1277eSChristian S.J. Peron { 113052f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 113152f1277eSChristian S.J. Peron struct mbuf mv, mb; 113252f1277eSChristian S.J. Peron 113352f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 113452f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 113552f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 113652f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 113752f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 113852f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 113952f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 114052f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 114152f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 114252f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 114352f1277eSChristian S.J. Peron /* 114452f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 114552f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 114652f1277eSChristian S.J. Peron * 114752f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 114852f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 114952f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 115052f1277eSChristian S.J. Peron * 115152f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 115252f1277eSChristian S.J. Peron */ 115352f1277eSChristian S.J. Peron if (data != NULL) { 115452f1277eSChristian S.J. Peron mv.m_next = m; 115552f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 115652f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 115752f1277eSChristian S.J. Peron mb.m_next = &mv; 115852f1277eSChristian S.J. Peron mb.m_data = data; 115952f1277eSChristian S.J. Peron mb.m_len = dlen; 116052f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 116152f1277eSChristian S.J. Peron } else 116252f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 116352f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 116452f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 116552f1277eSChristian S.J. Peron } 116652f1277eSChristian S.J. Peron 116760e87ca8SAndrew Thompson struct mbuf * 1168a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 116960e87ca8SAndrew Thompson { 117060e87ca8SAndrew Thompson struct ether_vlan_header *evl; 117160e87ca8SAndrew Thompson 1172eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_NOWAIT); 117360e87ca8SAndrew Thompson if (m == NULL) 117460e87ca8SAndrew Thompson return (NULL); 117560e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 117660e87ca8SAndrew Thompson 117760e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 117860e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 117960e87ca8SAndrew Thompson if (m == NULL) 118060e87ca8SAndrew Thompson return (NULL); 118160e87ca8SAndrew Thompson } 118260e87ca8SAndrew Thompson 118360e87ca8SAndrew Thompson /* 118460e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 118560e87ca8SAndrew Thompson * with 802.1Q encapsulation. 118660e87ca8SAndrew Thompson */ 118760e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 118860e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 118960e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 119060e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 119160e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 119260e87ca8SAndrew Thompson return (m); 119360e87ca8SAndrew Thompson } 119460e87ca8SAndrew Thompson 1195fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 119640811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1197