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 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 2114fb3a820SAlexander V. Chernikov eh = (struct ether_header *)phdr; 2124fb3a820SAlexander V. Chernikov 2134fb3a820SAlexander V. Chernikov switch (dst->sa_family) { 2144fb3a820SAlexander V. Chernikov #ifdef INET 2154fb3a820SAlexander V. Chernikov case AF_INET: 2164fb3a820SAlexander V. Chernikov if ((m->m_flags & (M_BCAST | M_MCAST)) == 0) 2174fb3a820SAlexander V. Chernikov error = arpresolve(ifp, 0, m, dst, phdr, &lleflags); 2184fb3a820SAlexander V. Chernikov else { 2194fb3a820SAlexander V. Chernikov if (m->m_flags & M_BCAST) 2204fb3a820SAlexander V. Chernikov memcpy(eh->ether_dhost, ifp->if_broadcastaddr, 2214fb3a820SAlexander V. Chernikov ETHER_ADDR_LEN); 2224fb3a820SAlexander V. Chernikov else { 2234fb3a820SAlexander V. Chernikov const struct in_addr *a; 2244fb3a820SAlexander V. Chernikov a = &(((const struct sockaddr_in *)dst)->sin_addr); 2254fb3a820SAlexander V. Chernikov ETHER_MAP_IP_MULTICAST(a, eh->ether_dhost); 2264fb3a820SAlexander V. Chernikov } 2274fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_IP); 2284fb3a820SAlexander V. Chernikov memcpy(&eh->ether_type, &etype, sizeof(etype)); 2294fb3a820SAlexander V. Chernikov memcpy(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN); 2304fb3a820SAlexander V. Chernikov } 2314fb3a820SAlexander V. Chernikov break; 2324fb3a820SAlexander V. Chernikov #endif 2334fb3a820SAlexander V. Chernikov #ifdef INET6 2344fb3a820SAlexander V. Chernikov case AF_INET6: 2354fb3a820SAlexander V. Chernikov if ((m->m_flags & M_MCAST) == 0) 2364fb3a820SAlexander V. Chernikov error = nd6_resolve(ifp, 0, m, dst, phdr, &lleflags); 2374fb3a820SAlexander V. Chernikov else { 2384fb3a820SAlexander V. Chernikov const struct in6_addr *a6; 2394fb3a820SAlexander V. Chernikov a6 = &(((const struct sockaddr_in6 *)dst)->sin6_addr); 2404fb3a820SAlexander V. Chernikov ETHER_MAP_IPV6_MULTICAST(a6, eh->ether_dhost); 2414fb3a820SAlexander V. Chernikov etype = htons(ETHERTYPE_IPV6); 2424fb3a820SAlexander V. Chernikov memcpy(&eh->ether_type, &etype, sizeof(etype)); 2434fb3a820SAlexander V. Chernikov memcpy(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN); 2444fb3a820SAlexander V. Chernikov } 2454fb3a820SAlexander V. Chernikov break; 2464fb3a820SAlexander V. Chernikov #endif 2474fb3a820SAlexander V. Chernikov default: 2484fb3a820SAlexander V. Chernikov if_printf(ifp, "can't handle af%d\n", dst->sa_family); 2494fb3a820SAlexander V. Chernikov if (m != NULL) 2504fb3a820SAlexander V. Chernikov m_freem(m); 2514fb3a820SAlexander V. Chernikov return (EAFNOSUPPORT); 2524fb3a820SAlexander V. Chernikov } 2534fb3a820SAlexander V. Chernikov 2544fb3a820SAlexander V. Chernikov if (error == EHOSTDOWN) { 25536402a68SAlexander V. Chernikov if (ro != NULL && (ro->ro_flags & RT_HAS_GW) != 0) 2564fb3a820SAlexander V. Chernikov error = EHOSTUNREACH; 2574fb3a820SAlexander V. Chernikov } 2584fb3a820SAlexander V. Chernikov 2594fb3a820SAlexander V. Chernikov if (error != 0) 2604fb3a820SAlexander V. Chernikov return (error); 2614fb3a820SAlexander V. Chernikov 2624fb3a820SAlexander V. Chernikov *pflags = RT_MAY_LOOP; 2634fb3a820SAlexander V. Chernikov if (lleflags & LLE_IFADDR) 2644fb3a820SAlexander V. Chernikov *pflags |= RT_L2_ME; 2654fb3a820SAlexander V. Chernikov 2664fb3a820SAlexander V. Chernikov return (0); 2674fb3a820SAlexander V. Chernikov } 2684fb3a820SAlexander V. Chernikov 2694fb3a820SAlexander V. Chernikov /* 270df8bae1dSRodney W. Grimes * Ethernet output routine. 271df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 272df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 273df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 274df8bae1dSRodney W. Grimes */ 275df8bae1dSRodney W. Grimes int 27672fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 27747e8d432SGleb Smirnoff const struct sockaddr *dst, struct route *ro) 278df8bae1dSRodney W. Grimes { 2794fb3a820SAlexander V. Chernikov int error = 0; 2804fb3a820SAlexander V. Chernikov char linkhdr[ETHER_HDR_LEN], *phdr; 281098a8c3bSMatthew N. Dodd struct ether_header *eh; 28260ee3847SMax Laier struct pf_mtag *t; 283c54c76ccSOleg Bulyzhin int loop_copy = 1; 284d32864c3SRobert Watson int hlen; /* link layer header length */ 2854fb3a820SAlexander V. Chernikov uint32_t pflags; 286df8bae1dSRodney W. Grimes 2874fb3a820SAlexander V. Chernikov phdr = NULL; 2884fb3a820SAlexander V. Chernikov pflags = 0; 289279aa3d4SKip Macy if (ro != NULL) { 2904fb3a820SAlexander V. Chernikov phdr = ro->ro_prepend; 2914fb3a820SAlexander V. Chernikov hlen = ro->ro_plen; 2924fb3a820SAlexander V. Chernikov pflags = ro->ro_flags; 293279aa3d4SKip Macy } 29443b29369SRobert Watson #ifdef MAC 29530d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 29643b29369SRobert Watson if (error) 29743b29369SRobert Watson senderr(error); 29843b29369SRobert Watson #endif 29943b29369SRobert Watson 3006eeac1d9SJulian Elischer M_PROFILE(m); 301afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 302afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 30313f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 30413f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 305df8bae1dSRodney W. Grimes senderr(ENETDOWN); 3067f760c48SMatthew N. Dodd 3074fb3a820SAlexander V. Chernikov if (phdr == NULL) { 3084fb3a820SAlexander V. Chernikov /* No prepend data supplied. Try to calculate ourselves. */ 3094fb3a820SAlexander V. Chernikov phdr = linkhdr; 31084dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 3114fb3a820SAlexander V. Chernikov error = ether_resolve_addr(ifp, m, dst, ro, phdr, &pflags); 3124fb3a820SAlexander V. Chernikov if (error != 0) 313cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 31443a6c75aSMatthew N. Dodd } 31543a6c75aSMatthew N. Dodd 3164fb3a820SAlexander V. Chernikov if ((pflags & RT_L2_ME) != 0) { 31722f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, m); 3186e6b3f7cSQing Li return (if_simloop(ifp, m, dst->sa_family, 0)); 3196e6b3f7cSQing Li } 3204fb3a820SAlexander V. Chernikov loop_copy = pflags & RT_MAY_LOOP; 3216e6b3f7cSQing Li 322df8bae1dSRodney W. Grimes /* 323df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 324df8bae1dSRodney W. Grimes * allocate another. 3256cdb1854SAlexander V. Chernikov * 3266cdb1854SAlexander V. Chernikov * Note that we do prepend regardless of RT_HAS_HEADER flag. 3276cdb1854SAlexander V. Chernikov * This is done because BPF code shifts m_data pointer 3286cdb1854SAlexander V. Chernikov * to the end of ethernet header prior to calling if_output(). 329df8bae1dSRodney W. Grimes */ 3304fb3a820SAlexander V. Chernikov M_PREPEND(m, hlen, M_NOWAIT); 3312166ffe8SRobert Watson if (m == NULL) 332df8bae1dSRodney W. Grimes senderr(ENOBUFS); 3334fb3a820SAlexander V. Chernikov if ((pflags & RT_HAS_HEADER) == 0) { 334df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 3354fb3a820SAlexander V. Chernikov memcpy(eh, phdr, hlen); 336c69aeaadSAlexander V. Chernikov } 337ed7509acSJulian Elischer 338ed7509acSJulian Elischer /* 339ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 340ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 341ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 342ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 343ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 344ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 345ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 346ed7509acSJulian Elischer */ 3474fb3a820SAlexander V. Chernikov if ((m->m_flags & M_BCAST) && loop_copy && (ifp->if_flags & IFF_SIMPLEX) && 34860ee3847SMax Laier ((t = pf_find_mtag(m)) == NULL || !t->routed)) { 34906f684b0SMatthew N. Dodd struct mbuf *n; 350ed7509acSJulian Elischer 351294dd290SLuigi Rizzo /* 352294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 353294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 354294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 355294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 356294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 357294dd290SLuigi Rizzo * extra data copying vs. extra locking). 3589983b3c0SYaroslav Tykhiy * 3599983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 3609983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 3619983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 362294dd290SLuigi Rizzo */ 363eb1b1807SGleb Smirnoff if ((n = m_dup(m, M_NOWAIT)) != NULL) { 36422f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, n); 36506a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 366c1404dc0SArchie Cobbs } else 3673751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 368ed7509acSJulian Elischer } 3692e2de7f2SArchie Cobbs 3703f7d1396SAndrew Thompson /* 3713f7d1396SAndrew Thompson * Bridges require special output handling. 3723f7d1396SAndrew Thompson */ 3733f7d1396SAndrew Thompson if (ifp->if_bridge) { 3743f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 3753f7d1396SAndrew Thompson return (error); 3763f7d1396SAndrew Thompson } 3773f7d1396SAndrew Thompson 378259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 379a9771948SGleb Smirnoff if (ifp->if_carp && 38008b68b0eSGleb Smirnoff (error = (*carp_output_p)(ifp, m, dst))) 381a9771948SGleb Smirnoff goto bad; 382a9771948SGleb Smirnoff #endif 383a9771948SGleb Smirnoff 384e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 385833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 386514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 387514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 388e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 389e1e1452dSArchie Cobbs bad: if (m != NULL) 390e1e1452dSArchie Cobbs m_freem(m); 391e1e1452dSArchie Cobbs return (error); 392e1e1452dSArchie Cobbs } 393e1e1452dSArchie Cobbs if (m == NULL) 394e1e1452dSArchie Cobbs return (0); 395e1e1452dSArchie Cobbs } 396e1e1452dSArchie Cobbs 397e1e1452dSArchie Cobbs /* Continue with link-layer output */ 398e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 399e1e1452dSArchie Cobbs } 400e1e1452dSArchie Cobbs 401e1e1452dSArchie Cobbs /* 402e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 403e1e1452dSArchie Cobbs * 404e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 405e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 406e1e1452dSArchie Cobbs */ 407e1e1452dSArchie Cobbs int 408c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 409e1e1452dSArchie Cobbs { 4107d4317bdSAlexander V. Chernikov int i; 4112b25acc1SLuigi Rizzo 4127d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook)) { 4137d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_OUT, NULL); 4147d4317bdSAlexander V. Chernikov 4157d4317bdSAlexander V. Chernikov if (i != 0) 4167d4317bdSAlexander V. Chernikov return (EACCES); 4177d4317bdSAlexander V. Chernikov 4187d4317bdSAlexander V. Chernikov if (m == NULL) 4197d4317bdSAlexander V. Chernikov return (0); 4204b984093SLuigi Rizzo } 4212b25acc1SLuigi Rizzo 422df8bae1dSRodney W. Grimes /* 423df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 424df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 425df8bae1dSRodney W. Grimes */ 426aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 427df8bae1dSRodney W. Grimes } 428df8bae1dSRodney W. Grimes 429d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 430d7647d96SDag-Erling Smørgrav #endif 4314b984093SLuigi Rizzo 4324b984093SLuigi Rizzo /* 433c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 434c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 435df8bae1dSRodney W. Grimes */ 436c1d93b05SSam Leffler static void 4376cb52192SRobert Watson ether_input_internal(struct ifnet *ifp, struct mbuf *m) 438df8bae1dSRodney W. Grimes { 439c1d93b05SSam Leffler struct ether_header *eh; 440c1d93b05SSam Leffler u_short etype; 441df8bae1dSRodney W. Grimes 44269462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 44369462a82SBruce M Simpson m_freem(m); 44469462a82SBruce M Simpson return; 44569462a82SBruce M Simpson } 44669462a82SBruce M Simpson #ifdef DIAGNOSTIC 44769462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 44869462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 44969462a82SBruce M Simpson m_freem(m); 45069462a82SBruce M Simpson return; 45169462a82SBruce M Simpson } 45269462a82SBruce M Simpson #endif 453797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 454c1d93b05SSam Leffler /* XXX maybe should pullup? */ 455c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 456c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 457c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 4583751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 459c1d93b05SSam Leffler m_freem(m); 460c1d93b05SSam Leffler return; 4612e2de7f2SArchie Cobbs } 462c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 463c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 464d1b06863SMark Murray random_harvest_queue(m, sizeof(*m), 2, RANDOM_NET_ETHER); 465d1b06863SMark Murray 46621ca7b57SMarko Zec CURVNET_SET_QUIET(ifp->if_vnet); 46721ca7b57SMarko Zec 46869462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 46969462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 47069462a82SBruce M Simpson m->m_flags |= M_BCAST; 47169462a82SBruce M Simpson else 47269462a82SBruce M Simpson m->m_flags |= M_MCAST; 4733751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IMCASTS, 1); 47469462a82SBruce M Simpson } 47569462a82SBruce M Simpson 476533d8562SRobert Watson #ifdef MAC 477533d8562SRobert Watson /* 478533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 479533d8562SRobert Watson * consumers can get to it. 480533d8562SRobert Watson */ 48130d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 482533d8562SRobert Watson #endif 483533d8562SRobert Watson 484c1d93b05SSam Leffler /* 48569462a82SBruce M Simpson * Give bpf a chance at the packet. 486c1d93b05SSam Leffler */ 487d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 4882e2de7f2SArchie Cobbs 48969462a82SBruce M Simpson /* 49069462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 49169462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 49269462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 49369462a82SBruce M Simpson */ 494c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 495c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 496c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 497c1d93b05SSam Leffler } 498c1d93b05SSam Leffler 4994cdc1f54SGleb Smirnoff if (!(ifp->if_capenable & IFCAP_HWSTATS)) 5003751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IBYTES, m->m_pkthdr.len); 50105463bb5SDavid Greenman 50269462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 503de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 504de572b37SChristian S.J. Peron m_freem(m); 50521ca7b57SMarko Zec CURVNET_RESTORE(); 506de572b37SChristian S.J. Peron return; 507de572b37SChristian S.J. Peron } 508de572b37SChristian S.J. Peron 50918242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 510b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 51118242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 51218242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 51318242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 514b47888ceSAndrew Thompson if (m != NULL) 515b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 5162db13e75SMarko Zec else { 5172db13e75SMarko Zec CURVNET_RESTORE(); 518b47888ceSAndrew Thompson return; 519b47888ceSAndrew Thompson } 5202db13e75SMarko Zec } 521b47888ceSAndrew Thompson 52269462a82SBruce M Simpson /* 52369462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 52469462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 52569462a82SBruce M Simpson * path correctly. 52669462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 52769462a82SBruce M Simpson */ 52869462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 52969462a82SBruce M Simpson struct ether_vlan_header *evl; 53069462a82SBruce M Simpson 53169462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 53269462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 533402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 53469462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 535402d5e27SBruce M Simpson #endif 5363751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 5372db13e75SMarko Zec CURVNET_RESTORE(); 53869462a82SBruce M Simpson return; 53969462a82SBruce M Simpson } 54069462a82SBruce M Simpson 54169462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 54269462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 54369462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 54469462a82SBruce M Simpson 54569462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 54669462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 54769462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 54897cce87fSGleb Smirnoff eh = mtod(m, struct ether_header *); 54969462a82SBruce M Simpson } 55069462a82SBruce M Simpson 551a34c6aebSBjoern A. Zeeb M_SETFIB(m, ifp->if_fib); 552a34c6aebSBjoern A. Zeeb 55369462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 554833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 555514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 55669462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 55769462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 558c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 55921ca7b57SMarko Zec if (m == NULL) { 56021ca7b57SMarko Zec CURVNET_RESTORE(); 561e1e1452dSArchie Cobbs return; 562e1e1452dSArchie Cobbs } 5635e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 56421ca7b57SMarko Zec } 565e1e1452dSArchie Cobbs 5668f867517SAndrew Thompson /* 56769462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 56869462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 56969462a82SBruce M Simpson * and the frame should be delivered locally. 5708f867517SAndrew Thompson */ 57169462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 57269462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 573fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 57421ca7b57SMarko Zec if (m == NULL) { 57521ca7b57SMarko Zec CURVNET_RESTORE(); 5768f867517SAndrew Thompson return; 5778f867517SAndrew Thompson } 5785e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 57921ca7b57SMarko Zec } 5808f867517SAndrew Thompson 581259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 58269462a82SBruce M Simpson /* 58369462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 58469462a82SBruce M Simpson * mbuf flows up to Layer 3. 58569462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 58669462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 58769462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 58869462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 58969462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 59069462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 59169462a82SBruce M Simpson */ 59254bfbd51SWill Andrews if (ifp->if_carp && (*carp_forus_p)(ifp, eh->ether_dhost)) { 59369462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 59469462a82SBruce M Simpson } else 59569462a82SBruce M Simpson #endif 59669462a82SBruce M Simpson { 59769462a82SBruce M Simpson /* 598e7f8c833SBruce M Simpson * If the frame received was not for our MAC address, set the 59969462a82SBruce M Simpson * M_PROMISC flag on the mbuf chain. The frame may need to 60069462a82SBruce M Simpson * be seen by the rest of the Ethernet input path in case of 60169462a82SBruce M Simpson * re-entry (e.g. bridge, vlan, netgraph) but should not be 60269462a82SBruce M Simpson * seen by upper protocol layers. 60369462a82SBruce M Simpson */ 60469462a82SBruce M Simpson if (!ETHER_IS_MULTICAST(eh->ether_dhost) && 605e7f8c833SBruce M Simpson bcmp(IF_LLADDR(ifp), eh->ether_dhost, ETHER_ADDR_LEN) != 0) 60669462a82SBruce M Simpson m->m_flags |= M_PROMISC; 60769462a82SBruce M Simpson } 60869462a82SBruce M Simpson 609acf032f5SRobert Watson ether_demux(ifp, m); 61021ca7b57SMarko Zec CURVNET_RESTORE(); 611e1e1452dSArchie Cobbs } 612e1e1452dSArchie Cobbs 613e1e1452dSArchie Cobbs /* 6146cb52192SRobert Watson * Ethernet input dispatch; by default, direct dispatch here regardless of 6157527624eSRobert Watson * global configuration. However, if RSS is enabled, hook up RSS affinity 6167527624eSRobert Watson * so that when deferred or hybrid dispatch is enabled, we can redistribute 6177527624eSRobert Watson * load based on RSS. 6187527624eSRobert Watson * 6197527624eSRobert Watson * XXXRW: Would be nice if the ifnet passed up a flag indicating whether or 6207527624eSRobert Watson * not it had already done work distribution via multi-queue. Then we could 6217527624eSRobert Watson * direct dispatch in the event load balancing was already complete and 6227527624eSRobert Watson * handle the case of interfaces with different capabilities better. 6237527624eSRobert Watson * 6247527624eSRobert Watson * XXXRW: Sort of want an M_DISTRIBUTED flag to avoid multiple distributions 6257527624eSRobert Watson * at multiple layers? 6267527624eSRobert Watson * 6277527624eSRobert Watson * XXXRW: For now, enable all this only if RSS is compiled in, although it 6287527624eSRobert Watson * works fine without RSS. Need to characterise the performance overhead 6297527624eSRobert Watson * of the detour through the netisr code in the event the result is always 6307527624eSRobert Watson * direct dispatch. 6316cb52192SRobert Watson */ 6326cb52192SRobert Watson static void 6336cb52192SRobert Watson ether_nh_input(struct mbuf *m) 6346cb52192SRobert Watson { 6356cb52192SRobert Watson 636b71bed24SAndrey V. Elsukov M_ASSERTPKTHDR(m); 637b71bed24SAndrey V. Elsukov KASSERT(m->m_pkthdr.rcvif != NULL, 638b71bed24SAndrey V. Elsukov ("%s: NULL interface pointer", __func__)); 6396cb52192SRobert Watson ether_input_internal(m->m_pkthdr.rcvif, m); 6406cb52192SRobert Watson } 6416cb52192SRobert Watson 6426cb52192SRobert Watson static struct netisr_handler ether_nh = { 6436cb52192SRobert Watson .nh_name = "ether", 6446cb52192SRobert Watson .nh_handler = ether_nh_input, 6456cb52192SRobert Watson .nh_proto = NETISR_ETHER, 6467527624eSRobert Watson #ifdef RSS 6477527624eSRobert Watson .nh_policy = NETISR_POLICY_CPU, 6487527624eSRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 6497527624eSRobert Watson .nh_m2cpuid = rss_m2cpuid, 6507527624eSRobert Watson #else 6516cb52192SRobert Watson .nh_policy = NETISR_POLICY_SOURCE, 6526cb52192SRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 6537527624eSRobert Watson #endif 6546cb52192SRobert Watson }; 6556cb52192SRobert Watson 6566cb52192SRobert Watson static void 6576cb52192SRobert Watson ether_init(__unused void *arg) 6586cb52192SRobert Watson { 6596cb52192SRobert Watson 6606cb52192SRobert Watson netisr_register(ðer_nh); 6616cb52192SRobert Watson } 6626cb52192SRobert Watson SYSINIT(ether, SI_SUB_INIT_IF, SI_ORDER_ANY, ether_init, NULL); 6636cb52192SRobert Watson 6646cb52192SRobert Watson static void 6657d4317bdSAlexander V. Chernikov vnet_ether_init(__unused void *arg) 6667d4317bdSAlexander V. Chernikov { 6677d4317bdSAlexander V. Chernikov int i; 6687d4317bdSAlexander V. Chernikov 6697d4317bdSAlexander V. Chernikov /* Initialize packet filter hooks. */ 6707d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_type = PFIL_TYPE_AF; 6717d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_af = AF_LINK; 6727d4317bdSAlexander V. Chernikov if ((i = pfil_head_register(&V_link_pfil_hook)) != 0) 6737d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to register pfil link hook, " 6747d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 6757d4317bdSAlexander V. Chernikov } 6767d4317bdSAlexander V. Chernikov VNET_SYSINIT(vnet_ether_init, SI_SUB_PROTO_IF, SI_ORDER_ANY, 6777d4317bdSAlexander V. Chernikov vnet_ether_init, NULL); 6787d4317bdSAlexander V. Chernikov 6797d4317bdSAlexander V. Chernikov static void 6807d4317bdSAlexander V. Chernikov vnet_ether_destroy(__unused void *arg) 6817d4317bdSAlexander V. Chernikov { 6827d4317bdSAlexander V. Chernikov int i; 6837d4317bdSAlexander V. Chernikov 6847d4317bdSAlexander V. Chernikov if ((i = pfil_head_unregister(&V_link_pfil_hook)) != 0) 6857d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to unregister pfil link hook, " 6867d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 6877d4317bdSAlexander V. Chernikov } 6887d4317bdSAlexander V. Chernikov VNET_SYSUNINIT(vnet_ether_uninit, SI_SUB_PROTO_IF, SI_ORDER_ANY, 6897d4317bdSAlexander V. Chernikov vnet_ether_destroy, NULL); 6907d4317bdSAlexander V. Chernikov 6917d4317bdSAlexander V. Chernikov 6927d4317bdSAlexander V. Chernikov 6937d4317bdSAlexander V. Chernikov static void 6946cb52192SRobert Watson ether_input(struct ifnet *ifp, struct mbuf *m) 6956cb52192SRobert Watson { 6966cb52192SRobert Watson 6974857f5fbSGeorge V. Neville-Neil struct mbuf *mn; 6984857f5fbSGeorge V. Neville-Neil 6994857f5fbSGeorge V. Neville-Neil /* 7004857f5fbSGeorge V. Neville-Neil * The drivers are allowed to pass in a chain of packets linked with 7014857f5fbSGeorge V. Neville-Neil * m_nextpkt. We split them up into separate packets here and pass 7024857f5fbSGeorge V. Neville-Neil * them up. This allows the drivers to amortize the receive lock. 7034857f5fbSGeorge V. Neville-Neil */ 7044857f5fbSGeorge V. Neville-Neil while (m) { 7054857f5fbSGeorge V. Neville-Neil mn = m->m_nextpkt; 7064857f5fbSGeorge V. Neville-Neil m->m_nextpkt = NULL; 7074857f5fbSGeorge V. Neville-Neil 7086cb52192SRobert Watson /* 7096cb52192SRobert Watson * We will rely on rcvif being set properly in the deferred context, 7106cb52192SRobert Watson * so assert it is correct here. 7116cb52192SRobert Watson */ 7126cb52192SRobert Watson KASSERT(m->m_pkthdr.rcvif == ifp, ("%s: ifnet mismatch", __func__)); 7136cb52192SRobert Watson netisr_dispatch(NETISR_ETHER, m); 7144857f5fbSGeorge V. Neville-Neil m = mn; 7154857f5fbSGeorge V. Neville-Neil } 7166cb52192SRobert Watson } 7176cb52192SRobert Watson 7186cb52192SRobert Watson /* 719e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 720e1e1452dSArchie Cobbs */ 721e1e1452dSArchie Cobbs void 722c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 723e1e1452dSArchie Cobbs { 724c1d93b05SSam Leffler struct ether_header *eh; 7257d4317bdSAlexander V. Chernikov int i, isr; 726e1e1452dSArchie Cobbs u_short ether_type; 72769462a82SBruce M Simpson 72869462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 72969462a82SBruce M Simpson 7307d4317bdSAlexander V. Chernikov /* Do not grab PROMISC frames in case we are re-entered. */ 7317d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook) && !(m->m_flags & M_PROMISC)) { 7327d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_IN, NULL); 7337d4317bdSAlexander V. Chernikov 7347d4317bdSAlexander V. Chernikov if (i != 0 || m == NULL) 7357d4317bdSAlexander V. Chernikov return; 73669462a82SBruce M Simpson } 7377d4317bdSAlexander V. Chernikov 738c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 739cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 740c1d93b05SSam Leffler 741a9771948SGleb Smirnoff /* 74269462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 74369462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 744a9771948SGleb Smirnoff */ 74569462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 74669462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 74775ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 7483751dddbSGleb Smirnoff if_inc_counter(ifp, IFCOUNTER_NOPROTO, 1); 7496c23e6ccSRuslan Ermilov m_freem(m); 7506c23e6ccSRuslan Ermilov return; 7516c23e6ccSRuslan Ermilov } 75269462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 75369462a82SBruce M Simpson __func__)); 75469462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 75569462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 756c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 757c1d93b05SSam Leffler return; 758c1d93b05SSam Leffler } 759c1d93b05SSam Leffler 760c1d93b05SSam Leffler /* 76169462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 76269462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 763c1d93b05SSam Leffler */ 76469462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 765c1d93b05SSam Leffler m_freem(m); 766c1d93b05SSam Leffler return; 767c1d93b05SSam Leffler } 768c1d93b05SSam Leffler 76969462a82SBruce M Simpson /* 77069462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 77169462a82SBruce M Simpson * Strip off Ethernet header. 77269462a82SBruce M Simpson */ 77369462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 77486bd0491SAndre Oppermann m_clrprotoflags(m); 775797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 776c1d93b05SSam Leffler 77769462a82SBruce M Simpson /* 77869462a82SBruce M Simpson * Dispatch frame to upper layer. 77969462a82SBruce M Simpson */ 780307d80beSDavid Greenman switch (ether_type) { 781df8bae1dSRodney W. Grimes #ifdef INET 782df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 7831cafed39SJonathan Lemon isr = NETISR_IP; 784df8bae1dSRodney W. Grimes break; 785df8bae1dSRodney W. Grimes 786df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 78708aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 78808aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 78908aadfbbSJonathan Lemon m_freem(m); 79008aadfbbSJonathan Lemon return; 79108aadfbbSJonathan Lemon } 7921cafed39SJonathan Lemon isr = NETISR_ARP; 793df8bae1dSRodney W. Grimes break; 794df8bae1dSRodney W. Grimes #endif 79582cd038dSYoshinobu Inoue #ifdef INET6 79682cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 7971cafed39SJonathan Lemon isr = NETISR_IPV6; 79882cd038dSYoshinobu Inoue break; 79982cd038dSYoshinobu Inoue #endif 800df8bae1dSRodney W. Grimes default: 8011cafed39SJonathan Lemon goto discard; 802df8bae1dSRodney W. Grimes } 8031cafed39SJonathan Lemon netisr_dispatch(isr, m); 804c1d93b05SSam Leffler return; 8051cafed39SJonathan Lemon 806c1d93b05SSam Leffler discard: 807c1d93b05SSam Leffler /* 808c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 809c1d93b05SSam Leffler * hand the packet to it for last chance processing; 810c1d93b05SSam Leffler * otherwise dispose of it. 811c1d93b05SSam Leffler */ 812833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 813514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 814514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 815c1d93b05SSam Leffler /* 816c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 817c1d93b05SSam Leffler * consistent view of inbound packets. 818c1d93b05SSam Leffler */ 819eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_HDR_LEN, M_NOWAIT); 820c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 821c1d93b05SSam Leffler return; 822c1d93b05SSam Leffler } 823c1d93b05SSam Leffler m_freem(m); 824c1d93b05SSam Leffler } 825c1d93b05SSam Leffler 826c1d93b05SSam Leffler /* 827c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 828c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 829c1d93b05SSam Leffler * 830c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 831c1d93b05SSam Leffler * 832c1d93b05SSam Leffler * since there's no static buffer involved. 833c1d93b05SSam Leffler */ 834c1d93b05SSam Leffler char * 835c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 836c1d93b05SSam Leffler { 837c1d93b05SSam Leffler static char etherbuf[18]; 838c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 839c1d93b05SSam Leffler return (etherbuf); 840df8bae1dSRodney W. Grimes } 841df8bae1dSRodney W. Grimes 842df8bae1dSRodney W. Grimes /* 843df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 844df8bae1dSRodney W. Grimes */ 845df8bae1dSRodney W. Grimes void 846d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 847df8bae1dSRodney W. Grimes { 848f93dfa28SBrooks Davis int i; 849098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 850098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 851df8bae1dSRodney W. Grimes 852c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 853c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 854cfeff1b6SJonathan Lemon if_attach(ifp); 855df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 856c1d93b05SSam Leffler ifp->if_output = ether_output; 857c1d93b05SSam Leffler ifp->if_input = ether_input; 8581158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 8594fb3a820SAlexander V. Chernikov ifp->if_requestencap = ether_requestencap; 860d3c351c5SMarko Zec #ifdef VIMAGE 861d3c351c5SMarko Zec ifp->if_reassign = ether_reassign; 862d3c351c5SMarko Zec #endif 863a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 864c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 865322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 866c1d93b05SSam Leffler 8674a0d6638SRuslan Ermilov ifa = ifp->if_addr; 8686e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 86959562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 870df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 871df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 872d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 873c1d93b05SSam Leffler 874797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 875e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 876e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 877e3bbbec2SMatthew N. Dodd 878f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 879f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 880d09ed26fSRuslan Ermilov if (lla[i] != 0) 881f93dfa28SBrooks Davis break; 882f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 883d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 884ef1f9169SMarcel Moolenaar 885ef1f9169SMarcel Moolenaar uuid_ether_add(LLADDR(sdl)); 886e1e1452dSArchie Cobbs } 887e1e1452dSArchie Cobbs 88821b8ebd9SArchie Cobbs /* 88921b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 89021b8ebd9SArchie Cobbs */ 89121b8ebd9SArchie Cobbs void 892c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 89321b8ebd9SArchie Cobbs { 894ef1f9169SMarcel Moolenaar struct sockaddr_dl *sdl; 895ef1f9169SMarcel Moolenaar 896ef1f9169SMarcel Moolenaar sdl = (struct sockaddr_dl *)(ifp->if_addr->ifa_addr); 897ef1f9169SMarcel Moolenaar uuid_ether_del(LLADDR(sdl)); 898ef1f9169SMarcel Moolenaar 899833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 900514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 901514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 90221b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 903514bcb89SPoul-Henning Kamp } 90420a65f37SAndrew Thompson 90521b8ebd9SArchie Cobbs bpfdetach(ifp); 90621b8ebd9SArchie Cobbs if_detach(ifp); 90721b8ebd9SArchie Cobbs } 90821b8ebd9SArchie Cobbs 909d3c351c5SMarko Zec #ifdef VIMAGE 910d3c351c5SMarko Zec void 911d3c351c5SMarko Zec ether_reassign(struct ifnet *ifp, struct vnet *new_vnet, char *unused __unused) 912d3c351c5SMarko Zec { 913d3c351c5SMarko Zec 914833e8dc5SGleb Smirnoff if (ifp->if_l2com != NULL) { 915d3c351c5SMarko Zec KASSERT(ng_ether_detach_p != NULL, 916d3c351c5SMarko Zec ("ng_ether_detach_p is NULL")); 917d3c351c5SMarko Zec (*ng_ether_detach_p)(ifp); 918d3c351c5SMarko Zec } 919d3c351c5SMarko Zec 920d3c351c5SMarko Zec if (ng_ether_attach_p != NULL) { 921d3c351c5SMarko Zec CURVNET_SET_QUIET(new_vnet); 922d3c351c5SMarko Zec (*ng_ether_attach_p)(ifp); 923d3c351c5SMarko Zec CURVNET_RESTORE(); 924d3c351c5SMarko Zec } 925d3c351c5SMarko Zec } 926d3c351c5SMarko Zec #endif 927d3c351c5SMarko Zec 928ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 929602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 93030106f6aSPoul-Henning Kamp 93116b4a343SChristian Weisgerber #if 0 93216b4a343SChristian Weisgerber /* 93316b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 93416b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 93516b4a343SChristian Weisgerber * than the double-loop. 93616b4a343SChristian Weisgerber */ 93716b4a343SChristian Weisgerber uint32_t 93816b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 93916b4a343SChristian Weisgerber { 94016b4a343SChristian Weisgerber size_t i; 94116b4a343SChristian Weisgerber uint32_t crc; 94216b4a343SChristian Weisgerber int bit; 94316b4a343SChristian Weisgerber uint8_t data; 94416b4a343SChristian Weisgerber 94516b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 94616b4a343SChristian Weisgerber 94716b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 948933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 94916b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 95016b4a343SChristian Weisgerber crc >>= 1; 95116b4a343SChristian Weisgerber if (carry) 95216b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 95316b4a343SChristian Weisgerber } 954933dad75SAntoine Brodin } 95516b4a343SChristian Weisgerber 95616b4a343SChristian Weisgerber return (crc); 95716b4a343SChristian Weisgerber } 95816b4a343SChristian Weisgerber #else 95916b4a343SChristian Weisgerber uint32_t 96016b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 96116b4a343SChristian Weisgerber { 96216b4a343SChristian Weisgerber static const uint32_t crctab[] = { 96316b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 96416b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 96516b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 96616b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 96716b4a343SChristian Weisgerber }; 96816b4a343SChristian Weisgerber size_t i; 96916b4a343SChristian Weisgerber uint32_t crc; 97016b4a343SChristian Weisgerber 97116b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 97216b4a343SChristian Weisgerber 97316b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 97416b4a343SChristian Weisgerber crc ^= buf[i]; 97516b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 97616b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 97716b4a343SChristian Weisgerber } 97816b4a343SChristian Weisgerber 97916b4a343SChristian Weisgerber return (crc); 98016b4a343SChristian Weisgerber } 98116b4a343SChristian Weisgerber #endif 98216b4a343SChristian Weisgerber 98316b4a343SChristian Weisgerber uint32_t 98416b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 98516b4a343SChristian Weisgerber { 98616b4a343SChristian Weisgerber size_t i; 98716b4a343SChristian Weisgerber uint32_t crc, carry; 98816b4a343SChristian Weisgerber int bit; 98916b4a343SChristian Weisgerber uint8_t data; 99016b4a343SChristian Weisgerber 99116b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 99216b4a343SChristian Weisgerber 99316b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 99416b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 99516b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 99616b4a343SChristian Weisgerber crc <<= 1; 99716b4a343SChristian Weisgerber if (carry) 99816b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 99916b4a343SChristian Weisgerber } 100016b4a343SChristian Weisgerber } 100116b4a343SChristian Weisgerber 100216b4a343SChristian Weisgerber return (crc); 100316b4a343SChristian Weisgerber } 100416b4a343SChristian Weisgerber 1005fb583156SDavid Greenman int 1006995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 100730106f6aSPoul-Henning Kamp { 100830106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 100930106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 1010fb583156SDavid Greenman int error = 0; 101130106f6aSPoul-Henning Kamp 101230106f6aSPoul-Henning Kamp switch (command) { 101330106f6aSPoul-Henning Kamp case SIOCSIFADDR: 101430106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 101530106f6aSPoul-Henning Kamp 101630106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 101730106f6aSPoul-Henning Kamp #ifdef INET 101830106f6aSPoul-Henning Kamp case AF_INET: 101930106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1020322dcb8dSMax Khon arp_ifinit(ifp, ifa); 102130106f6aSPoul-Henning Kamp break; 102230106f6aSPoul-Henning Kamp #endif 102330106f6aSPoul-Henning Kamp default: 102430106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 102530106f6aSPoul-Henning Kamp break; 102630106f6aSPoul-Henning Kamp } 102730106f6aSPoul-Henning Kamp break; 102830106f6aSPoul-Henning Kamp 102930106f6aSPoul-Henning Kamp case SIOCGIFADDR: 103030106f6aSPoul-Henning Kamp { 103130106f6aSPoul-Henning Kamp struct sockaddr *sa; 103230106f6aSPoul-Henning Kamp 103330106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 10344a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 103530106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 103630106f6aSPoul-Henning Kamp } 103730106f6aSPoul-Henning Kamp break; 1038fb583156SDavid Greenman 1039fb583156SDavid Greenman case SIOCSIFMTU: 1040fb583156SDavid Greenman /* 1041fb583156SDavid Greenman * Set the interface MTU. 1042fb583156SDavid Greenman */ 1043fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1044fb583156SDavid Greenman error = EINVAL; 1045fb583156SDavid Greenman } else { 1046fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 104730106f6aSPoul-Henning Kamp } 1048fb583156SDavid Greenman break; 1049c1d93b05SSam Leffler default: 1050c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1051c1d93b05SSam Leffler break; 1052fb583156SDavid Greenman } 1053fb583156SDavid Greenman return (error); 105430106f6aSPoul-Henning Kamp } 10551158dfb7SGarrett Wollman 105637c84183SPoul-Henning Kamp static int 105772fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 105872fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 10591158dfb7SGarrett Wollman { 10601158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1061d7647d96SDag-Erling Smørgrav #ifdef INET 10621158dfb7SGarrett Wollman struct sockaddr_in *sin; 1063d7647d96SDag-Erling Smørgrav #endif 106482cd038dSYoshinobu Inoue #ifdef INET6 106582cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 106682cd038dSYoshinobu Inoue #endif 10671158dfb7SGarrett Wollman u_char *e_addr; 10681158dfb7SGarrett Wollman 10691158dfb7SGarrett Wollman switch(sa->sa_family) { 10701158dfb7SGarrett Wollman case AF_LINK: 10717f33a738SJulian Elischer /* 10727f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 10737f33a738SJulian Elischer */ 10741158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 10751158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1076086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 10771158dfb7SGarrett Wollman return EADDRNOTAVAIL; 1078155d72c4SPedro F. Giffuni *llsa = NULL; 10791158dfb7SGarrett Wollman return 0; 10801158dfb7SGarrett Wollman 10811158dfb7SGarrett Wollman #ifdef INET 10821158dfb7SGarrett Wollman case AF_INET: 10831158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 10841158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 10851158dfb7SGarrett Wollman return EADDRNOTAVAIL; 108695fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 10871158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 10881158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 10891158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 10901158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 10911158dfb7SGarrett Wollman return 0; 10921158dfb7SGarrett Wollman #endif 109382cd038dSYoshinobu Inoue #ifdef INET6 109482cd038dSYoshinobu Inoue case AF_INET6: 109582cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1096595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1097595b8a1cSJun-ichiro itojun Hagino /* 1098595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1099595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1100595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1101595b8a1cSJun-ichiro itojun Hagino */ 1102595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1103155d72c4SPedro F. Giffuni *llsa = NULL; 1104595b8a1cSJun-ichiro itojun Hagino return 0; 1105595b8a1cSJun-ichiro itojun Hagino } 110682cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 110782cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 110895fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 110982cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 111082cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 111182cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 111282cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 111382cd038dSYoshinobu Inoue return 0; 111482cd038dSYoshinobu Inoue #endif 11151158dfb7SGarrett Wollman 11161158dfb7SGarrett Wollman default: 11171158dfb7SGarrett Wollman /* 11181158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 11191158dfb7SGarrett Wollman * that counts... 11201158dfb7SGarrett Wollman */ 11211158dfb7SGarrett Wollman return EAFNOSUPPORT; 11221158dfb7SGarrett Wollman } 11231158dfb7SGarrett Wollman } 112440811c14SMatthew N. Dodd 112540811c14SMatthew N. Dodd static moduledata_t ether_mod = { 1126833e8dc5SGleb Smirnoff .name = "ether", 112740811c14SMatthew N. Dodd }; 112840811c14SMatthew N. Dodd 112952f1277eSChristian S.J. Peron void 113052f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 113152f1277eSChristian S.J. Peron { 113252f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 113352f1277eSChristian S.J. Peron struct mbuf mv, mb; 113452f1277eSChristian S.J. Peron 113552f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 113652f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 113752f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 113852f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 113952f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 114052f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 114152f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 114252f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 114352f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 114452f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 114552f1277eSChristian S.J. Peron /* 114652f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 114752f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 114852f1277eSChristian S.J. Peron * 114952f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 115052f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 115152f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 115252f1277eSChristian S.J. Peron * 115352f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 115452f1277eSChristian S.J. Peron */ 115552f1277eSChristian S.J. Peron if (data != NULL) { 115652f1277eSChristian S.J. Peron mv.m_next = m; 115752f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 115852f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 115952f1277eSChristian S.J. Peron mb.m_next = &mv; 116052f1277eSChristian S.J. Peron mb.m_data = data; 116152f1277eSChristian S.J. Peron mb.m_len = dlen; 116252f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 116352f1277eSChristian S.J. Peron } else 116452f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 116552f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 116652f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 116752f1277eSChristian S.J. Peron } 116852f1277eSChristian S.J. Peron 116960e87ca8SAndrew Thompson struct mbuf * 1170a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 117160e87ca8SAndrew Thompson { 117260e87ca8SAndrew Thompson struct ether_vlan_header *evl; 117360e87ca8SAndrew Thompson 1174eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_NOWAIT); 117560e87ca8SAndrew Thompson if (m == NULL) 117660e87ca8SAndrew Thompson return (NULL); 117760e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 117860e87ca8SAndrew Thompson 117960e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 118060e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 118160e87ca8SAndrew Thompson if (m == NULL) 118260e87ca8SAndrew Thompson return (NULL); 118360e87ca8SAndrew Thompson } 118460e87ca8SAndrew Thompson 118560e87ca8SAndrew Thompson /* 118660e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 118760e87ca8SAndrew Thompson * with 802.1Q encapsulation. 118860e87ca8SAndrew Thompson */ 118960e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 119060e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 119160e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 119260e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 119360e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 119460e87ca8SAndrew Thompson return (m); 119560e87ca8SAndrew Thompson } 119660e87ca8SAndrew Thompson 1197fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 119840811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1199