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 337262d3e4SEivind Eklund #include "opt_atalk.h" 341d5e9e22SEivind Eklund #include "opt_inet.h" 35cfa1ca9dSYoshinobu Inoue #include "opt_inet6.h" 36430df5f4SEivind Eklund #include "opt_ipx.h" 3743b29369SRobert Watson #include "opt_mac.h" 384cf49a43SJulian Elischer #include "opt_netgraph.h" 39a9771948SGleb Smirnoff #include "opt_carp.h" 40430df5f4SEivind Eklund 41df8bae1dSRodney W. Grimes #include <sys/param.h> 42df8bae1dSRodney W. Grimes #include <sys/systm.h> 43df8bae1dSRodney W. Grimes #include <sys/kernel.h> 44df8bae1dSRodney W. Grimes #include <sys/malloc.h> 4541ee9f1cSPoul-Henning Kamp #include <sys/module.h> 46df8bae1dSRodney W. Grimes #include <sys/mbuf.h> 4710b1fde0SMark Murray #include <sys/random.h> 48df8bae1dSRodney W. Grimes #include <sys/socket.h> 4951a53488SBruce Evans #include <sys/sockio.h> 50602d513cSGarrett Wollman #include <sys/sysctl.h> 51df8bae1dSRodney W. Grimes 52df8bae1dSRodney W. Grimes #include <net/if.h> 53d7647d96SDag-Erling Smørgrav #include <net/if_arp.h> 54df8bae1dSRodney W. Grimes #include <net/netisr.h> 55df8bae1dSRodney W. Grimes #include <net/route.h> 56df8bae1dSRodney W. Grimes #include <net/if_llc.h> 57df8bae1dSRodney W. Grimes #include <net/if_dl.h> 58df8bae1dSRodney W. Grimes #include <net/if_types.h> 592e2de7f2SArchie Cobbs #include <net/bpf.h> 60e1e1452dSArchie Cobbs #include <net/ethernet.h> 61fd6238a6SAndrew Thompson #include <net/if_bridgevar.h> 62c1d93b05SSam Leffler #include <net/if_vlan_var.h> 63df8bae1dSRodney W. Grimes 6482cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 65df8bae1dSRodney W. Grimes #include <netinet/in.h> 66df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 67df8bae1dSRodney W. Grimes #include <netinet/if_ether.h> 684b984093SLuigi Rizzo #include <netinet/ip_fw.h> 694b984093SLuigi Rizzo #include <netinet/ip_dummynet.h> 701d5e9e22SEivind Eklund #endif 7182cd038dSYoshinobu Inoue #ifdef INET6 7282cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 7382cd038dSYoshinobu Inoue #endif 74df8bae1dSRodney W. Grimes 75a9771948SGleb Smirnoff #ifdef DEV_CARP 76a9771948SGleb Smirnoff #include <netinet/ip_carp.h> 77a9771948SGleb Smirnoff #endif 78a9771948SGleb Smirnoff 79cc6a66f2SJulian Elischer #ifdef IPX 80cc6a66f2SJulian Elischer #include <netipx/ipx.h> 81cc6a66f2SJulian Elischer #include <netipx/ipx_if.h> 82a1026028SMaxim Sobolev #endif 834f93599fSBoris Popov int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m); 845accfb8cSBoris Popov int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp, 852a7e8eceSBoris Popov struct sockaddr *dst, short *tp, int *hlen); 86cc6a66f2SJulian Elischer 87655929bfSJulian Elischer #ifdef NETATALK 88655929bfSJulian Elischer #include <netatalk/at.h> 89655929bfSJulian Elischer #include <netatalk/at_var.h> 90655929bfSJulian Elischer #include <netatalk/at_extern.h> 91655929bfSJulian Elischer 92655929bfSJulian Elischer #define llc_snap_org_code llc_un.type_snap.org_code 93655929bfSJulian Elischer #define llc_snap_ether_type llc_un.type_snap.ether_type 94655929bfSJulian Elischer 95655929bfSJulian Elischer extern u_char at_org_code[3]; 96655929bfSJulian Elischer extern u_char aarp_org_code[3]; 972cc2df49SGarrett Wollman #endif /* NETATALK */ 982cc2df49SGarrett Wollman 99aed55708SRobert Watson #include <security/mac/mac_framework.h> 100aed55708SRobert Watson 101e1e1452dSArchie Cobbs /* netgraph node hooks for ng_ether(4) */ 102c1d93b05SSam Leffler void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 103c1d93b05SSam Leffler void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 104e1e1452dSArchie Cobbs int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 105e1e1452dSArchie Cobbs void (*ng_ether_attach_p)(struct ifnet *ifp); 106e1e1452dSArchie Cobbs void (*ng_ether_detach_p)(struct ifnet *ifp); 107e1e1452dSArchie Cobbs 108824eb9dcSDavid E. O'Brien void (*vlan_input_p)(struct ifnet *, struct mbuf *); 1099d4fe4b2SBrooks Davis 110fd6238a6SAndrew Thompson /* if_bridge(4) support */ 1118f867517SAndrew Thompson struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *); 1128f867517SAndrew Thompson int (*bridge_output_p)(struct ifnet *, struct mbuf *, 1138f867517SAndrew Thompson struct sockaddr *, struct rtentry *); 114c8b01292SAndrew Thompson void (*bridge_dn_p)(struct mbuf *, struct ifnet *); 1158f867517SAndrew Thompson 116e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 117868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 118868d8b62SMatthew N. Dodd 119929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 120929ddbbbSAlfred Perlstein struct sockaddr *); 121868d8b62SMatthew N. Dodd 122fc74a9f9SBrooks Davis /* XXX: should be in an arp support file, not here */ 123fc74a9f9SBrooks Davis MALLOC_DEFINE(M_ARPCOM, "arpcom", "802.* interface internals"); 124fc74a9f9SBrooks Davis 1254c8e8c05SJulian Elischer #define senderr(e) do { error = (e); goto bad;} while (0) 126df8bae1dSRodney W. Grimes 127d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 1284b984093SLuigi Rizzo int 1294b984093SLuigi Rizzo ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, 130c1d93b05SSam Leffler struct ip_fw **rule, int shared); 1314b984093SLuigi Rizzo static int ether_ipfw; 132d7647d96SDag-Erling Smørgrav #endif 1334b984093SLuigi Rizzo 134df8bae1dSRodney W. Grimes /* 135df8bae1dSRodney W. Grimes * Ethernet output routine. 136df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 137df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 138df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 139df8bae1dSRodney W. Grimes */ 140df8bae1dSRodney W. Grimes int 14172fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 14272fd1b6aSDag-Erling Smørgrav struct sockaddr *dst, struct rtentry *rt0) 143df8bae1dSRodney W. Grimes { 144df8bae1dSRodney W. Grimes short type; 145cd46a114SLuigi Rizzo int error, hdrcmplt = 0; 14664760eb0SWarner Losh u_char esrc[ETHER_ADDR_LEN], edst[ETHER_ADDR_LEN]; 147098a8c3bSMatthew N. Dodd struct ether_header *eh; 148c54c76ccSOleg Bulyzhin int loop_copy = 1; 149d32864c3SRobert Watson int hlen; /* link layer header length */ 150df8bae1dSRodney W. Grimes 15143b29369SRobert Watson #ifdef MAC 15243b29369SRobert Watson error = mac_check_ifnet_transmit(ifp, m); 15343b29369SRobert Watson if (error) 15443b29369SRobert Watson senderr(error); 15543b29369SRobert Watson #endif 15643b29369SRobert Watson 157afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 158afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 15913f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 16013f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 161df8bae1dSRodney W. Grimes senderr(ENETDOWN); 1627f760c48SMatthew N. Dodd 16384dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 164df8bae1dSRodney W. Grimes switch (dst->sa_family) { 165df8bae1dSRodney W. Grimes #ifdef INET 166df8bae1dSRodney W. Grimes case AF_INET: 167cd46a114SLuigi Rizzo error = arpresolve(ifp, rt0, m, dst, edst); 168cd46a114SLuigi Rizzo if (error) 169cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 17034bed8b0SDavid Greenman type = htons(ETHERTYPE_IP); 171df8bae1dSRodney W. Grimes break; 17243a6c75aSMatthew N. Dodd case AF_ARP: 17343a6c75aSMatthew N. Dodd { 17443a6c75aSMatthew N. Dodd struct arphdr *ah; 17543a6c75aSMatthew N. Dodd ah = mtod(m, struct arphdr *); 17643a6c75aSMatthew N. Dodd ah->ar_hrd = htons(ARPHRD_ETHER); 17743a6c75aSMatthew N. Dodd 178c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 17943a6c75aSMatthew N. Dodd 18043a6c75aSMatthew N. Dodd switch(ntohs(ah->ar_op)) { 18143a6c75aSMatthew N. Dodd case ARPOP_REVREQUEST: 18243a6c75aSMatthew N. Dodd case ARPOP_REVREPLY: 18343a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_REVARP); 18443a6c75aSMatthew N. Dodd break; 18543a6c75aSMatthew N. Dodd case ARPOP_REQUEST: 18643a6c75aSMatthew N. Dodd case ARPOP_REPLY: 18743a6c75aSMatthew N. Dodd default: 18843a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_ARP); 18943a6c75aSMatthew N. Dodd break; 19043a6c75aSMatthew N. Dodd } 19143a6c75aSMatthew N. Dodd 19243a6c75aSMatthew N. Dodd if (m->m_flags & M_BCAST) 19343a6c75aSMatthew N. Dodd bcopy(ifp->if_broadcastaddr, edst, ETHER_ADDR_LEN); 19443a6c75aSMatthew N. Dodd else 19543a6c75aSMatthew N. Dodd bcopy(ar_tha(ah), edst, ETHER_ADDR_LEN); 19643a6c75aSMatthew N. Dodd 19743a6c75aSMatthew N. Dodd } 19843a6c75aSMatthew N. Dodd break; 199df8bae1dSRodney W. Grimes #endif 20082cd038dSYoshinobu Inoue #ifdef INET6 20182cd038dSYoshinobu Inoue case AF_INET6: 202cd46a114SLuigi Rizzo error = nd6_storelladdr(ifp, rt0, m, dst, (u_char *)edst); 203cd46a114SLuigi Rizzo if (error) 204cd46a114SLuigi Rizzo return error; 20582cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 20682cd038dSYoshinobu Inoue break; 20782cd038dSYoshinobu Inoue #endif 208cc6a66f2SJulian Elischer #ifdef IPX 209cc6a66f2SJulian Elischer case AF_IPX: 2104f93599fSBoris Popov if (ef_outputp) { 2112a7e8eceSBoris Popov error = ef_outputp(ifp, &m, dst, &type, &hlen); 2125accfb8cSBoris Popov if (error) 2135accfb8cSBoris Popov goto bad; 2144f93599fSBoris Popov } else 21534bed8b0SDavid Greenman type = htons(ETHERTYPE_IPX); 216cc6a66f2SJulian Elischer bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 217cc6a66f2SJulian Elischer (caddr_t)edst, sizeof (edst)); 218cc6a66f2SJulian Elischer break; 219cc6a66f2SJulian Elischer #endif 220655929bfSJulian Elischer #ifdef NETATALK 221655929bfSJulian Elischer case AF_APPLETALK: 2221d0eab59SJulian Elischer { 223ed7509acSJulian Elischer struct at_ifaddr *aa; 2241d0eab59SJulian Elischer 225cd46a114SLuigi Rizzo if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) 226cd46a114SLuigi Rizzo senderr(EHOSTUNREACH); /* XXX */ 227cd46a114SLuigi Rizzo if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) 2281d0eab59SJulian Elischer return (0); 229655929bfSJulian Elischer /* 230ed7509acSJulian Elischer * In the phase 2 case, need to prepend an mbuf for the llc header. 231655929bfSJulian Elischer */ 232655929bfSJulian Elischer if ( aa->aa_flags & AFA_PHASE2 ) { 233655929bfSJulian Elischer struct llc llc; 234655929bfSJulian Elischer 2357e2041e0SRobert Watson M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); 2362166ffe8SRobert Watson if (m == NULL) 2372166ffe8SRobert Watson senderr(ENOBUFS); 238655929bfSJulian Elischer llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 239655929bfSJulian Elischer llc.llc_control = LLC_UI; 240655929bfSJulian Elischer bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 241655929bfSJulian Elischer llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 242797f247bSMatthew N. Dodd bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 24334bed8b0SDavid Greenman type = htons(m->m_pkthdr.len); 244797f247bSMatthew N. Dodd hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN; 245655929bfSJulian Elischer } else { 24634bed8b0SDavid Greenman type = htons(ETHERTYPE_AT); 247655929bfSJulian Elischer } 248655929bfSJulian Elischer break; 249ed7509acSJulian Elischer } 2508cdfefbdSPeter Wemm #endif /* NETATALK */ 251df8bae1dSRodney W. Grimes 252114ae644SMike Smith case pseudo_AF_HDRCMPLT: 253114ae644SMike Smith hdrcmplt = 1; 254114ae644SMike Smith eh = (struct ether_header *)dst->sa_data; 255114ae644SMike Smith (void)memcpy(esrc, eh->ether_shost, sizeof (esrc)); 256114ae644SMike Smith /* FALLTHROUGH */ 257114ae644SMike Smith 258df8bae1dSRodney W. Grimes case AF_UNSPEC: 259c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 260df8bae1dSRodney W. Grimes eh = (struct ether_header *)dst->sa_data; 26194a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 262df8bae1dSRodney W. Grimes type = eh->ether_type; 263df8bae1dSRodney W. Grimes break; 264df8bae1dSRodney W. Grimes 265df8bae1dSRodney W. Grimes default: 26629e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 267df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 268df8bae1dSRodney W. Grimes } 269df8bae1dSRodney W. Grimes 270df8bae1dSRodney W. Grimes /* 271df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 272df8bae1dSRodney W. Grimes * allocate another. 273df8bae1dSRodney W. Grimes */ 274797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 2752166ffe8SRobert Watson if (m == NULL) 276df8bae1dSRodney W. Grimes senderr(ENOBUFS); 277df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 27894a5d9b6SDavid Greenman (void)memcpy(&eh->ether_type, &type, 279df8bae1dSRodney W. Grimes sizeof(eh->ether_type)); 28094a5d9b6SDavid Greenman (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); 281114ae644SMike Smith if (hdrcmplt) 282114ae644SMike Smith (void)memcpy(eh->ether_shost, esrc, 283114ae644SMike Smith sizeof(eh->ether_shost)); 284114ae644SMike Smith else 2854a0d6638SRuslan Ermilov (void)memcpy(eh->ether_shost, IF_LLADDR(ifp), 286df8bae1dSRodney W. Grimes sizeof(eh->ether_shost)); 287ed7509acSJulian Elischer 288ed7509acSJulian Elischer /* 289ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 290ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 291ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 292ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 293ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 294ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 295ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 296ed7509acSJulian Elischer */ 297c54c76ccSOleg Bulyzhin if ((ifp->if_flags & IFF_SIMPLEX) && loop_copy && 2980bdf5171SMax Laier m_tag_find(m, PACKET_TAG_PF_ROUTED, NULL) == NULL) { 2993cd67511SJesper Skriver int csum_flags = 0; 3003cd67511SJesper Skriver 3013cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_IP) 3023cd67511SJesper Skriver csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 3033cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 3043cd67511SJesper Skriver csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 30506f684b0SMatthew N. Dodd 306c54c76ccSOleg Bulyzhin if (m->m_flags & M_BCAST) { 30706f684b0SMatthew N. Dodd struct mbuf *n; 308ed7509acSJulian Elischer 309294dd290SLuigi Rizzo /* 310294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 311294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 312294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 313294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 314294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 315294dd290SLuigi Rizzo * extra data copying vs. extra locking). 3169983b3c0SYaroslav Tykhiy * 3179983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 3189983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 3199983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 320294dd290SLuigi Rizzo */ 321294dd290SLuigi Rizzo if ((n = m_dup(m, M_DONTWAIT)) != NULL) { 3223cd67511SJesper Skriver n->m_pkthdr.csum_flags |= csum_flags; 3233cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3243cd67511SJesper Skriver n->m_pkthdr.csum_data = 0xffff; 32506a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 326c1404dc0SArchie Cobbs } else 327c1404dc0SArchie Cobbs ifp->if_iqdrops++; 32806f684b0SMatthew N. Dodd } else if (bcmp(eh->ether_dhost, eh->ether_shost, 32906f684b0SMatthew N. Dodd ETHER_ADDR_LEN) == 0) { 3303cd67511SJesper Skriver m->m_pkthdr.csum_flags |= csum_flags; 3313cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3323cd67511SJesper Skriver m->m_pkthdr.csum_data = 0xffff; 33306a429a3SArchie Cobbs (void) if_simloop(ifp, m, dst->sa_family, hlen); 334ed7509acSJulian Elischer return (0); /* XXX */ 335ed7509acSJulian Elischer } 336ed7509acSJulian Elischer } 3372e2de7f2SArchie Cobbs 3383f7d1396SAndrew Thompson /* 3393f7d1396SAndrew Thompson * Bridges require special output handling. 3403f7d1396SAndrew Thompson */ 3413f7d1396SAndrew Thompson if (ifp->if_bridge) { 3423f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 3433f7d1396SAndrew Thompson return (error); 3443f7d1396SAndrew Thompson } 3453f7d1396SAndrew Thompson 346a9771948SGleb Smirnoff #ifdef DEV_CARP 347a9771948SGleb Smirnoff if (ifp->if_carp && 348a9771948SGleb Smirnoff (error = carp_output(ifp, m, dst, NULL))) 349a9771948SGleb Smirnoff goto bad; 350a9771948SGleb Smirnoff #endif 351a9771948SGleb Smirnoff 352e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 353eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 354514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 355514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 356e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 357e1e1452dSArchie Cobbs bad: if (m != NULL) 358e1e1452dSArchie Cobbs m_freem(m); 359e1e1452dSArchie Cobbs return (error); 360e1e1452dSArchie Cobbs } 361e1e1452dSArchie Cobbs if (m == NULL) 362e1e1452dSArchie Cobbs return (0); 363e1e1452dSArchie Cobbs } 364e1e1452dSArchie Cobbs 365e1e1452dSArchie Cobbs /* Continue with link-layer output */ 366e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 367e1e1452dSArchie Cobbs } 368e1e1452dSArchie Cobbs 369e1e1452dSArchie Cobbs /* 370e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 371e1e1452dSArchie Cobbs * 372e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 373e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 374e1e1452dSArchie Cobbs */ 375e1e1452dSArchie Cobbs int 376c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 377e1e1452dSArchie Cobbs { 378d0a2acd4SJulian Elischer int error; 379d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 380ac9d7e26SMax Laier struct ip_fw *rule = ip_dn_claim_rule(m); 3812b25acc1SLuigi Rizzo 3824b984093SLuigi Rizzo if (IPFW_LOADED && ether_ipfw != 0) { 383c1d93b05SSam Leffler if (ether_ipfw_chk(&m, ifp, &rule, 0) == 0) { 3844b984093SLuigi Rizzo if (m) { 3854b984093SLuigi Rizzo m_freem(m); 386e7909401SDavid Malone return EACCES; /* pkt dropped */ 3874b984093SLuigi Rizzo } else 3884b984093SLuigi Rizzo return 0; /* consumed e.g. in a pipe */ 3894b984093SLuigi Rizzo } 3904b984093SLuigi Rizzo } 391d7647d96SDag-Erling Smørgrav #endif 3922b25acc1SLuigi Rizzo 393df8bae1dSRodney W. Grimes /* 394df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 395df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 396df8bae1dSRodney W. Grimes */ 397affc907dSMax Laier IFQ_HANDOFF(ifp, m, error); 398affc907dSMax Laier return (error); 399df8bae1dSRodney W. Grimes } 400df8bae1dSRodney W. Grimes 401d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 402df8bae1dSRodney W. Grimes /* 4034b984093SLuigi Rizzo * ipfw processing for ethernet packets (in and out). 4044b984093SLuigi Rizzo * The second parameter is NULL from ether_demux, and ifp from 405b6de9e91SMax Laier * ether_output_frame. 4064b984093SLuigi Rizzo */ 4074b984093SLuigi Rizzo int 4084b984093SLuigi Rizzo ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, 409c1d93b05SSam Leffler struct ip_fw **rule, int shared) 4104b984093SLuigi Rizzo { 411c1d93b05SSam Leffler struct ether_header *eh; 412c1d93b05SSam Leffler struct ether_header save_eh; 413c1d93b05SSam Leffler struct mbuf *m; 4144b984093SLuigi Rizzo int i; 4152b25acc1SLuigi Rizzo struct ip_fw_args args; 4164b984093SLuigi Rizzo 41797850a5dSLuigi Rizzo if (*rule != NULL && fw_one_pass) 418015d72e0SLuigi Rizzo return 1; /* dummynet packet, already partially processed */ 4192f8ebbf4SLuigi Rizzo 4204b984093SLuigi Rizzo /* 4212f8ebbf4SLuigi Rizzo * I need some amt of data to be contiguous, and in case others need 4224b984093SLuigi Rizzo * the packet (shared==1) also better be in the first mbuf. 4234b984093SLuigi Rizzo */ 424c1d93b05SSam Leffler m = *m0; 425c1d93b05SSam Leffler i = min( m->m_pkthdr.len, max_protohdr); 426c1d93b05SSam Leffler if ( shared || m->m_len < i) { 427c1d93b05SSam Leffler m = m_pullup(m, i); 428c1d93b05SSam Leffler if (m == NULL) { 429c1d93b05SSam Leffler *m0 = m; 4304b984093SLuigi Rizzo return 0; 4314b984093SLuigi Rizzo } 432c1d93b05SSam Leffler } 433c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 434c1d93b05SSam Leffler save_eh = *eh; /* save copy for restore below */ 435c1d93b05SSam Leffler m_adj(m, ETHER_HDR_LEN); /* strip ethernet header */ 4364b984093SLuigi Rizzo 437c1d93b05SSam Leffler args.m = m; /* the packet we are looking at */ 4382b25acc1SLuigi Rizzo args.oif = dst; /* destination, if any */ 4392b25acc1SLuigi Rizzo args.rule = *rule; /* matching rule to restart */ 4402b25acc1SLuigi Rizzo args.next_hop = NULL; /* we do not support forward yet */ 4412b25acc1SLuigi Rizzo args.eh = &save_eh; /* MAC header for bridged/MAC packets */ 4423ecf1851SOleg Bulyzhin args.inp = NULL; /* used by ipfw uid/gid/jail rules */ 4432b25acc1SLuigi Rizzo i = ip_fw_chk_ptr(&args); 444c1d93b05SSam Leffler m = args.m; 445c1d93b05SSam Leffler if (m != NULL) { 446c1d93b05SSam Leffler /* 447c1d93b05SSam Leffler * Restore Ethernet header, as needed, in case the 448c1d93b05SSam Leffler * mbuf chain was replaced by ipfw. 449c1d93b05SSam Leffler */ 450a163d034SWarner Losh M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 451c1d93b05SSam Leffler if (m == NULL) { 452c1d93b05SSam Leffler *m0 = m; 453c1d93b05SSam Leffler return 0; 454c1d93b05SSam Leffler } 455c1d93b05SSam Leffler if (eh != mtod(m, struct ether_header *)) 456c1d93b05SSam Leffler bcopy(&save_eh, mtod(m, struct ether_header *), 457c1d93b05SSam Leffler ETHER_HDR_LEN); 458c1d93b05SSam Leffler } 459c1d93b05SSam Leffler *m0 = m; 4602b25acc1SLuigi Rizzo *rule = args.rule; 4612b25acc1SLuigi Rizzo 4626c69a7c3SGleb Smirnoff if (i == IP_FW_DENY) /* drop */ 4634b984093SLuigi Rizzo return 0; 4644b984093SLuigi Rizzo 4656c69a7c3SGleb Smirnoff KASSERT(m != NULL, ("ether_ipfw_chk: m is NULL")); 4666c69a7c3SGleb Smirnoff 4676c69a7c3SGleb Smirnoff if (i == IP_FW_PASS) /* a PASS rule. */ 4684b984093SLuigi Rizzo return 1; 4694b984093SLuigi Rizzo 4706c69a7c3SGleb Smirnoff if (DUMMYNET_LOADED && (i == IP_FW_DUMMYNET)) { 4714b984093SLuigi Rizzo /* 4724b984093SLuigi Rizzo * Pass the pkt to dummynet, which consumes it. 4734b984093SLuigi Rizzo * If shared, make a copy and keep the original. 4744b984093SLuigi Rizzo */ 4754b984093SLuigi Rizzo if (shared) { 476a163d034SWarner Losh m = m_copypacket(m, M_DONTWAIT); 4772b25acc1SLuigi Rizzo if (m == NULL) 4784b984093SLuigi Rizzo return 0; 4794b984093SLuigi Rizzo } else { 4802b25acc1SLuigi Rizzo /* 481c1d93b05SSam Leffler * Pass the original to dummynet and 482c1d93b05SSam Leffler * nothing back to the caller 4832b25acc1SLuigi Rizzo */ 484c1d93b05SSam Leffler *m0 = NULL ; 4854b984093SLuigi Rizzo } 48628935658SGleb Smirnoff ip_dn_io_ptr(m, dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args); 4874b984093SLuigi Rizzo return 0; 4884b984093SLuigi Rizzo } 4894b984093SLuigi Rizzo /* 4902f8ebbf4SLuigi Rizzo * XXX at some point add support for divert/forward actions. 4912f8ebbf4SLuigi Rizzo * If none of the above matches, we have to drop the pkt. 4924b984093SLuigi Rizzo */ 4934b984093SLuigi Rizzo return 0; 4944b984093SLuigi Rizzo } 495d7647d96SDag-Erling Smørgrav #endif 4964b984093SLuigi Rizzo 4974b984093SLuigi Rizzo /* 498c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 499c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 500df8bae1dSRodney W. Grimes */ 501c1d93b05SSam Leffler static void 502c1d93b05SSam Leffler ether_input(struct ifnet *ifp, struct mbuf *m) 503df8bae1dSRodney W. Grimes { 504c1d93b05SSam Leffler struct ether_header *eh; 505c1d93b05SSam Leffler u_short etype; 506df8bae1dSRodney W. Grimes 507c1d93b05SSam Leffler /* 508c1d93b05SSam Leffler * Do consistency checks to verify assumptions 509c1d93b05SSam Leffler * made by code past this point. 510c1d93b05SSam Leffler */ 511c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 512c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 513c1d93b05SSam Leffler ifp->if_ierrors++; 514c939f1aeSLuigi Rizzo m_freem(m); 515c939f1aeSLuigi Rizzo return; 516c939f1aeSLuigi Rizzo } 517797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 518c1d93b05SSam Leffler /* XXX maybe should pullup? */ 519c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 520c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 521c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 522c1d93b05SSam Leffler ifp->if_ierrors++; 523c1d93b05SSam Leffler m_freem(m); 524c1d93b05SSam Leffler return; 5252e2de7f2SArchie Cobbs } 526c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 527c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 528c1d93b05SSam Leffler if (m->m_pkthdr.len > 529c1d93b05SSam Leffler ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 530c1d93b05SSam Leffler if_printf(ifp, "discard oversize frame " 531c1d93b05SSam Leffler "(ether type %x flags %x len %u > max %lu)\n", 532c1d93b05SSam Leffler etype, m->m_flags, m->m_pkthdr.len, 533c1d93b05SSam Leffler ETHER_MAX_FRAME(ifp, etype, 534c1d93b05SSam Leffler m->m_flags & M_HASFCS)); 535c1d93b05SSam Leffler ifp->if_ierrors++; 536c1d93b05SSam Leffler m_freem(m); 537c1d93b05SSam Leffler return; 538c1d93b05SSam Leffler } 539c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 540c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 541c1d93b05SSam Leffler ifp->if_ierrors++; 542c1d93b05SSam Leffler m_freem(m); 543c1d93b05SSam Leffler return; 544c1d93b05SSam Leffler } 545c1d93b05SSam Leffler #ifdef DIAGNOSTIC 546c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 5479bf40edeSBrooks Davis if_printf(ifp, "Warning, frame marked as received on %s\n", 5489bf40edeSBrooks Davis m->m_pkthdr.rcvif->if_xname); 549c1d93b05SSam Leffler } 550c1d93b05SSam Leffler #endif 551c1d93b05SSam Leffler 552533d8562SRobert Watson #ifdef MAC 553533d8562SRobert Watson /* 554533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 555533d8562SRobert Watson * consumers can get to it. 556533d8562SRobert Watson */ 557533d8562SRobert Watson mac_create_mbuf_from_ifnet(ifp, m); 558533d8562SRobert Watson #endif 559533d8562SRobert Watson 560c1d93b05SSam Leffler /* 561c1d93b05SSam Leffler * Give bpf a chance at the packet. 562c1d93b05SSam Leffler */ 563c1d93b05SSam Leffler BPF_MTAP(ifp, m); 5642e2de7f2SArchie Cobbs 565c1d93b05SSam Leffler /* If the CRC is still on the packet, trim it off. */ 566c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 567c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 568c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 569c1d93b05SSam Leffler } 570c1d93b05SSam Leffler 571c1d93b05SSam Leffler ifp->if_ibytes += m->m_pkthdr.len; 57205463bb5SDavid Greenman 573de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 574de572b37SChristian S.J. Peron /* 575de572b37SChristian S.J. Peron * Interface marked for monitoring; discard packet. 576de572b37SChristian S.J. Peron */ 577de572b37SChristian S.J. Peron m_freem(m); 578de572b37SChristian S.J. Peron return; 579de572b37SChristian S.J. Peron } 580de572b37SChristian S.J. Peron 581e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 582eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 583514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 584514bcb89SPoul-Henning Kamp ("ng_ether_input_p is NULL")); 585c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 586e1e1452dSArchie Cobbs if (m == NULL) 587e1e1452dSArchie Cobbs return; 588e1e1452dSArchie Cobbs } 589e1e1452dSArchie Cobbs 5908f867517SAndrew Thompson /* 5918f867517SAndrew Thompson * Tap the packet off here for a bridge. bridge_input() 5928f867517SAndrew Thompson * will return NULL if it has consumed the packet, otherwise 5938f867517SAndrew Thompson * it gets processed as normal. Note that bridge_input() 5948f867517SAndrew Thompson * will always return the original packet if we need to 5958f867517SAndrew Thompson * process it locally. 5966512768bSGleb Smirnoff * 5976512768bSGleb Smirnoff * XXX: When changing the below block, please also look 5986512768bSGleb Smirnoff * at the src/sys/netgraph/ng_ether.c:ng_ether_rcv_upper() 5998f867517SAndrew Thompson */ 6008f867517SAndrew Thompson if (ifp->if_bridge) { 601fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 6028f867517SAndrew Thompson if (m == NULL) 6038f867517SAndrew Thompson return; 6048f867517SAndrew Thompson } 6058f867517SAndrew Thompson 606a6ddbff0SPoul-Henning Kamp /* First chunk of an mbuf contains good entropy */ 60710b1fde0SMark Murray if (harvest.ethernet) 60810b1fde0SMark Murray random_harvest(m, 16, 3, 0, RANDOM_NET); 609acf032f5SRobert Watson ether_demux(ifp, m); 610e1e1452dSArchie Cobbs } 611e1e1452dSArchie Cobbs 612e1e1452dSArchie Cobbs /* 613e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 614e1e1452dSArchie Cobbs */ 615e1e1452dSArchie Cobbs void 616c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 617e1e1452dSArchie Cobbs { 618c1d93b05SSam Leffler struct ether_header *eh; 6191cafed39SJonathan Lemon int isr; 620e1e1452dSArchie Cobbs u_short ether_type; 621e1e1452dSArchie Cobbs #if defined(NETATALK) 622098a8c3bSMatthew N. Dodd struct llc *l; 623e1e1452dSArchie Cobbs #endif 624d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 625ac9d7e26SMax Laier struct ip_fw *rule = ip_dn_claim_rule(m); 626d7647d96SDag-Erling Smørgrav #endif 62736e8826fSMax Laier 628c1d93b05SSam Leffler KASSERT(ifp != NULL, ("ether_demux: NULL interface pointer")); 629c1d93b05SSam Leffler 630c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 631cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 632c1d93b05SSam Leffler 633d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 6342b25acc1SLuigi Rizzo if (rule) /* packet was already bridged */ 6352b25acc1SLuigi Rizzo goto post_stats; 636d7647d96SDag-Erling Smørgrav #endif 6374b984093SLuigi Rizzo 638b6de9e91SMax Laier if (!(ifp->if_bridge) && 6396ee20ab5SRuslan Ermilov !((ether_type == ETHERTYPE_VLAN || m->m_flags & M_VLANTAG) && 64075ee267cSGleb Smirnoff ifp->if_vlantrunk != NULL)) { 641a9771948SGleb Smirnoff #ifdef DEV_CARP 642a9771948SGleb Smirnoff /* 64358996b13SGleb Smirnoff * XXX: Okay, we need to call carp_forus() and - if it is for 64458996b13SGleb Smirnoff * us jump over code that does the normal check 6454a0d6638SRuslan Ermilov * "IF_LLADDR(ifp) == ether_dhost". The check sequence is a bit 64658996b13SGleb Smirnoff * different from OpenBSD, so we jump over as few code as 64758996b13SGleb Smirnoff * possible, to catch _all_ sanity checks. This needs 64858996b13SGleb Smirnoff * evaluation, to see if the carp ether_dhost values break any 64958996b13SGleb Smirnoff * of these checks! 650a9771948SGleb Smirnoff */ 651a9771948SGleb Smirnoff if (ifp->if_carp && carp_forus(ifp->if_carp, eh->ether_dhost)) 652a9771948SGleb Smirnoff goto pre_stats; 653a9771948SGleb Smirnoff #endif 654c6943100SPoul-Henning Kamp /* 655c6943100SPoul-Henning Kamp * Discard packet if upper layers shouldn't see it because it 656c6943100SPoul-Henning Kamp * was unicast to a different Ethernet address. If the driver 657c6943100SPoul-Henning Kamp * is working properly, then this situation can only happen 658c6943100SPoul-Henning Kamp * when the interface is in promiscuous mode. 659cd0cd014SJoerg Wunsch * 660cd0cd014SJoerg Wunsch * If VLANs are active, and this packet has a VLAN tag, do 661cd0cd014SJoerg Wunsch * not drop it here but pass it on to the VLAN layer, to 662cd0cd014SJoerg Wunsch * give them a chance to consider it as well (e. g. in case 663cd0cd014SJoerg Wunsch * bridging is only active on a VLAN). They will drop it if 664cd0cd014SJoerg Wunsch * it's undesired. 665c6943100SPoul-Henning Kamp */ 666cb24f323SArchie Cobbs if ((ifp->if_flags & IFF_PROMISC) != 0 6676ee20ab5SRuslan Ermilov && !ETHER_IS_MULTICAST(eh->ether_dhost) 668cb24f323SArchie Cobbs && bcmp(eh->ether_dhost, 6694a0d6638SRuslan Ermilov IF_LLADDR(ifp), ETHER_ADDR_LEN) != 0 67025faf49dSMaxim Sobolev && (ifp->if_flags & IFF_PPROMISC) == 0) { 671cb24f323SArchie Cobbs m_freem(m); 672cb24f323SArchie Cobbs return; 673cb24f323SArchie Cobbs } 674c6943100SPoul-Henning Kamp } 675cb24f323SArchie Cobbs 676a9771948SGleb Smirnoff #ifdef DEV_CARP 677a9771948SGleb Smirnoff pre_stats: 678a9771948SGleb Smirnoff #endif 6792e2de7f2SArchie Cobbs /* Discard packet if interface is not up */ 680df8bae1dSRodney W. Grimes if ((ifp->if_flags & IFF_UP) == 0) { 681df8bae1dSRodney W. Grimes m_freem(m); 682df8bae1dSRodney W. Grimes return; 683df8bae1dSRodney W. Grimes } 684588523faSSam Leffler if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 68564760eb0SWarner Losh if (bcmp(etherbroadcastaddr, eh->ether_dhost, 686df8bae1dSRodney W. Grimes sizeof(etherbroadcastaddr)) == 0) 687df8bae1dSRodney W. Grimes m->m_flags |= M_BCAST; 6882cc2df49SGarrett Wollman else 689df8bae1dSRodney W. Grimes m->m_flags |= M_MCAST; 6902cc2df49SGarrett Wollman } 691df8bae1dSRodney W. Grimes if (m->m_flags & (M_BCAST|M_MCAST)) 692df8bae1dSRodney W. Grimes ifp->if_imcasts++; 693df8bae1dSRodney W. Grimes 694d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 6954b984093SLuigi Rizzo post_stats: 6964b984093SLuigi Rizzo if (IPFW_LOADED && ether_ipfw != 0) { 697c1d93b05SSam Leffler if (ether_ipfw_chk(&m, NULL, &rule, 0) == 0) { 6984b984093SLuigi Rizzo if (m) 6994b984093SLuigi Rizzo m_freem(m); 7004b984093SLuigi Rizzo return; 7014b984093SLuigi Rizzo } 7024b984093SLuigi Rizzo } 703d7647d96SDag-Erling Smørgrav #endif 7044b984093SLuigi Rizzo 705c1d93b05SSam Leffler /* 7066c23e6ccSRuslan Ermilov * Check to see if the device performed the VLAN decapsulation and 707c1d93b05SSam Leffler * provided us with the tag. 708c1d93b05SSam Leffler */ 7096ee20ab5SRuslan Ermilov if (m->m_flags & M_VLANTAG) { 710c1d93b05SSam Leffler /* 7116c23e6ccSRuslan Ermilov * If no VLANs are configured, drop. 7126c23e6ccSRuslan Ermilov */ 71375ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 7146c23e6ccSRuslan Ermilov ifp->if_noproto++; 7156c23e6ccSRuslan Ermilov m_freem(m); 7166c23e6ccSRuslan Ermilov return; 7176c23e6ccSRuslan Ermilov } 7186c23e6ccSRuslan Ermilov /* 719c1d93b05SSam Leffler * vlan_input() will either recursively call ether_input() 720c1d93b05SSam Leffler * or drop the packet. 721c1d93b05SSam Leffler */ 722c1d93b05SSam Leffler KASSERT(vlan_input_p != NULL,("ether_input: VLAN not loaded!")); 723c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 724c1d93b05SSam Leffler return; 725c1d93b05SSam Leffler } 726c1d93b05SSam Leffler 727c1d93b05SSam Leffler /* 728c1d93b05SSam Leffler * Handle protocols that expect to have the Ethernet header 729c1d93b05SSam Leffler * (and possibly FCS) intact. 730c1d93b05SSam Leffler */ 731c1d93b05SSam Leffler switch (ether_type) { 732c1d93b05SSam Leffler case ETHERTYPE_VLAN: 73375ee267cSGleb Smirnoff if (ifp->if_vlantrunk != NULL) { 734c1d93b05SSam Leffler KASSERT(vlan_input_p,("ether_input: VLAN not loaded!")); 735c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 736c1d93b05SSam Leffler } else { 737c1d93b05SSam Leffler ifp->if_noproto++; 738c1d93b05SSam Leffler m_freem(m); 739c1d93b05SSam Leffler } 740c1d93b05SSam Leffler return; 741c1d93b05SSam Leffler } 742c1d93b05SSam Leffler 743c1d93b05SSam Leffler /* Strip off Ethernet header. */ 744797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 745c1d93b05SSam Leffler 746c1d93b05SSam Leffler /* If the CRC is still on the packet, trim it off. */ 747c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 748c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 749c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 750c1d93b05SSam Leffler } 751c1d93b05SSam Leffler 752147f74d1SAndre Oppermann /* Reset layer specific mbuf flags to avoid confusing upper layers. */ 753147f74d1SAndre Oppermann m->m_flags &= ~(M_PROTOFLAGS); 754147f74d1SAndre Oppermann 755307d80beSDavid Greenman switch (ether_type) { 756df8bae1dSRodney W. Grimes #ifdef INET 757df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 7585d691e6dSAndre Oppermann if ((m = ip_fastforward(m)) == NULL) 7591f91d8c5SDavid Greenman return; 7601cafed39SJonathan Lemon isr = NETISR_IP; 761df8bae1dSRodney W. Grimes break; 762df8bae1dSRodney W. Grimes 763df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 76408aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 76508aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 76608aadfbbSJonathan Lemon m_freem(m); 76708aadfbbSJonathan Lemon return; 76808aadfbbSJonathan Lemon } 7691cafed39SJonathan Lemon isr = NETISR_ARP; 770df8bae1dSRodney W. Grimes break; 771df8bae1dSRodney W. Grimes #endif 772cc6a66f2SJulian Elischer #ifdef IPX 773cc6a66f2SJulian Elischer case ETHERTYPE_IPX: 7744f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 7754f93599fSBoris Popov return; 7761cafed39SJonathan Lemon isr = NETISR_IPX; 777cc6a66f2SJulian Elischer break; 778cc6a66f2SJulian Elischer #endif 77982cd038dSYoshinobu Inoue #ifdef INET6 78082cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 7811cafed39SJonathan Lemon isr = NETISR_IPV6; 78282cd038dSYoshinobu Inoue break; 78382cd038dSYoshinobu Inoue #endif 784655929bfSJulian Elischer #ifdef NETATALK 785655929bfSJulian Elischer case ETHERTYPE_AT: 7861cafed39SJonathan Lemon isr = NETISR_ATALK1; 787655929bfSJulian Elischer break; 788655929bfSJulian Elischer case ETHERTYPE_AARP: 7891cafed39SJonathan Lemon isr = NETISR_AARP; 7901cafed39SJonathan Lemon break; 7918cdfefbdSPeter Wemm #endif /* NETATALK */ 792df8bae1dSRodney W. Grimes default: 7934f93599fSBoris Popov #ifdef IPX 7944f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 7954f93599fSBoris Popov return; 7964f93599fSBoris Popov #endif /* IPX */ 797242c5536SPeter Wemm #if defined(NETATALK) 798307d80beSDavid Greenman if (ether_type > ETHERMTU) 799c1d93b05SSam Leffler goto discard; 800df8bae1dSRodney W. Grimes l = mtod(m, struct llc *); 8011cafed39SJonathan Lemon if (l->llc_dsap == LLC_SNAP_LSAP && 8021cafed39SJonathan Lemon l->llc_ssap == LLC_SNAP_LSAP && 8031cafed39SJonathan Lemon l->llc_control == LLC_UI) { 8044158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], at_org_code, 805655929bfSJulian Elischer sizeof(at_org_code)) == 0 && 806655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 807797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8081cafed39SJonathan Lemon isr = NETISR_ATALK2; 809655929bfSJulian Elischer break; 810655929bfSJulian Elischer } 8114158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 812655929bfSJulian Elischer sizeof(aarp_org_code)) == 0 && 813655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 814797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8151cafed39SJonathan Lemon isr = NETISR_AARP; 816655929bfSJulian Elischer break; 817df8bae1dSRodney W. Grimes } 8181cafed39SJonathan Lemon } 819242c5536SPeter Wemm #endif /* NETATALK */ 8201cafed39SJonathan Lemon goto discard; 821df8bae1dSRodney W. Grimes } 8221cafed39SJonathan Lemon netisr_dispatch(isr, m); 823c1d93b05SSam Leffler return; 8241cafed39SJonathan Lemon 825c1d93b05SSam Leffler discard: 826c1d93b05SSam Leffler /* 827c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 828c1d93b05SSam Leffler * hand the packet to it for last chance processing; 829c1d93b05SSam Leffler * otherwise dispose of it. 830c1d93b05SSam Leffler */ 831eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 832514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 833514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 834c1d93b05SSam Leffler /* 835c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 836c1d93b05SSam Leffler * consistent view of inbound packets. 837c1d93b05SSam Leffler */ 838797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 839c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 840c1d93b05SSam Leffler return; 841c1d93b05SSam Leffler } 842c1d93b05SSam Leffler m_freem(m); 843c1d93b05SSam Leffler } 844c1d93b05SSam Leffler 845c1d93b05SSam Leffler /* 846c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 847c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 848c1d93b05SSam Leffler * 849c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 850c1d93b05SSam Leffler * 851c1d93b05SSam Leffler * since there's no static buffer involved. 852c1d93b05SSam Leffler */ 853c1d93b05SSam Leffler char * 854c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 855c1d93b05SSam Leffler { 856c1d93b05SSam Leffler static char etherbuf[18]; 857c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 858c1d93b05SSam Leffler return (etherbuf); 859df8bae1dSRodney W. Grimes } 860df8bae1dSRodney W. Grimes 861df8bae1dSRodney W. Grimes /* 862df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 863df8bae1dSRodney W. Grimes */ 864df8bae1dSRodney W. Grimes void 865d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 866df8bae1dSRodney W. Grimes { 867f93dfa28SBrooks Davis int i; 868098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 869098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 870df8bae1dSRodney W. Grimes 871c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 872c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 873cfeff1b6SJonathan Lemon if_attach(ifp); 874df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 875c1d93b05SSam Leffler ifp->if_output = ether_output; 876c1d93b05SSam Leffler ifp->if_input = ether_input; 8771158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 878a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 879c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 880322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 881c1d93b05SSam Leffler 8824a0d6638SRuslan Ermilov ifa = ifp->if_addr; 8836e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 88459562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 885df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 886df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 887d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 888c1d93b05SSam Leffler 889797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 890e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 891e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 892e3bbbec2SMatthew N. Dodd 893f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 894f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 895d09ed26fSRuslan Ermilov if (lla[i] != 0) 896f93dfa28SBrooks Davis break; 897f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 898d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 899af5e59bfSRobert Watson if (debug_mpsafenet && (ifp->if_flags & IFF_NEEDSGIANT) != 0) 900af5e59bfSRobert Watson if_printf(ifp, "if_start running deferred for Giant\n"); 901e1e1452dSArchie Cobbs } 902e1e1452dSArchie Cobbs 90321b8ebd9SArchie Cobbs /* 90421b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 90521b8ebd9SArchie Cobbs */ 90621b8ebd9SArchie Cobbs void 907c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 90821b8ebd9SArchie Cobbs { 909514bcb89SPoul-Henning Kamp if (IFP2AC(ifp)->ac_netgraph != NULL) { 910514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 911514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 91221b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 913514bcb89SPoul-Henning Kamp } 91420a65f37SAndrew Thompson 91521b8ebd9SArchie Cobbs bpfdetach(ifp); 91621b8ebd9SArchie Cobbs if_detach(ifp); 91721b8ebd9SArchie Cobbs } 91821b8ebd9SArchie Cobbs 919ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 920602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 921d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 9224b984093SLuigi Rizzo SYSCTL_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW, 9234b984093SLuigi Rizzo ðer_ipfw,0,"Pass ether pkts through firewall"); 924d7647d96SDag-Erling Smørgrav #endif 92530106f6aSPoul-Henning Kamp 92616b4a343SChristian Weisgerber #if 0 92716b4a343SChristian Weisgerber /* 92816b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 92916b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 93016b4a343SChristian Weisgerber * than the double-loop. 93116b4a343SChristian Weisgerber */ 93216b4a343SChristian Weisgerber uint32_t 93316b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 93416b4a343SChristian Weisgerber { 93516b4a343SChristian Weisgerber size_t i; 93616b4a343SChristian Weisgerber uint32_t crc; 93716b4a343SChristian Weisgerber int bit; 93816b4a343SChristian Weisgerber uint8_t data; 93916b4a343SChristian Weisgerber 94016b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 94116b4a343SChristian Weisgerber 94216b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 94316b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) 94416b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 94516b4a343SChristian Weisgerber crc >>= 1; 94616b4a343SChristian Weisgerber if (carry) 94716b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 94816b4a343SChristian Weisgerber } 94916b4a343SChristian Weisgerber 95016b4a343SChristian Weisgerber return (crc); 95116b4a343SChristian Weisgerber } 95216b4a343SChristian Weisgerber #else 95316b4a343SChristian Weisgerber uint32_t 95416b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 95516b4a343SChristian Weisgerber { 95616b4a343SChristian Weisgerber static const uint32_t crctab[] = { 95716b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 95816b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 95916b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 96016b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 96116b4a343SChristian Weisgerber }; 96216b4a343SChristian Weisgerber size_t i; 96316b4a343SChristian Weisgerber uint32_t crc; 96416b4a343SChristian Weisgerber 96516b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 96616b4a343SChristian Weisgerber 96716b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 96816b4a343SChristian Weisgerber crc ^= buf[i]; 96916b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 97016b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 97116b4a343SChristian Weisgerber } 97216b4a343SChristian Weisgerber 97316b4a343SChristian Weisgerber return (crc); 97416b4a343SChristian Weisgerber } 97516b4a343SChristian Weisgerber #endif 97616b4a343SChristian Weisgerber 97716b4a343SChristian Weisgerber uint32_t 97816b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 97916b4a343SChristian Weisgerber { 98016b4a343SChristian Weisgerber size_t i; 98116b4a343SChristian Weisgerber uint32_t crc, carry; 98216b4a343SChristian Weisgerber int bit; 98316b4a343SChristian Weisgerber uint8_t data; 98416b4a343SChristian Weisgerber 98516b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 98616b4a343SChristian Weisgerber 98716b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 98816b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 98916b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 99016b4a343SChristian Weisgerber crc <<= 1; 99116b4a343SChristian Weisgerber if (carry) 99216b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 99316b4a343SChristian Weisgerber } 99416b4a343SChristian Weisgerber } 99516b4a343SChristian Weisgerber 99616b4a343SChristian Weisgerber return (crc); 99716b4a343SChristian Weisgerber } 99816b4a343SChristian Weisgerber 999fb583156SDavid Greenman int 100072fd1b6aSDag-Erling Smørgrav ether_ioctl(struct ifnet *ifp, int command, caddr_t data) 100130106f6aSPoul-Henning Kamp { 100230106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 100330106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 1004fb583156SDavid Greenman int error = 0; 100530106f6aSPoul-Henning Kamp 100630106f6aSPoul-Henning Kamp switch (command) { 100730106f6aSPoul-Henning Kamp case SIOCSIFADDR: 100830106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 100930106f6aSPoul-Henning Kamp 101030106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 101130106f6aSPoul-Henning Kamp #ifdef INET 101230106f6aSPoul-Henning Kamp case AF_INET: 101330106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1014322dcb8dSMax Khon arp_ifinit(ifp, ifa); 101530106f6aSPoul-Henning Kamp break; 101630106f6aSPoul-Henning Kamp #endif 101730106f6aSPoul-Henning Kamp #ifdef IPX 101830106f6aSPoul-Henning Kamp /* 101930106f6aSPoul-Henning Kamp * XXX - This code is probably wrong 102030106f6aSPoul-Henning Kamp */ 102130106f6aSPoul-Henning Kamp case AF_IPX: 102230106f6aSPoul-Henning Kamp { 1023098a8c3bSMatthew N. Dodd struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 102430106f6aSPoul-Henning Kamp 102530106f6aSPoul-Henning Kamp if (ipx_nullhost(*ina)) 102630106f6aSPoul-Henning Kamp ina->x_host = 102786101139SPoul-Henning Kamp *(union ipx_host *) 10284a0d6638SRuslan Ermilov IF_LLADDR(ifp); 102930106f6aSPoul-Henning Kamp else { 103030106f6aSPoul-Henning Kamp bcopy((caddr_t) ina->x_host.c_host, 10314a0d6638SRuslan Ermilov (caddr_t) IF_LLADDR(ifp), 1032fc74a9f9SBrooks Davis ETHER_ADDR_LEN); 103330106f6aSPoul-Henning Kamp } 103430106f6aSPoul-Henning Kamp 103530106f6aSPoul-Henning Kamp /* 103630106f6aSPoul-Henning Kamp * Set new address 103730106f6aSPoul-Henning Kamp */ 103830106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 103930106f6aSPoul-Henning Kamp break; 104030106f6aSPoul-Henning Kamp } 104130106f6aSPoul-Henning Kamp #endif 104230106f6aSPoul-Henning Kamp default: 104330106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 104430106f6aSPoul-Henning Kamp break; 104530106f6aSPoul-Henning Kamp } 104630106f6aSPoul-Henning Kamp break; 104730106f6aSPoul-Henning Kamp 104830106f6aSPoul-Henning Kamp case SIOCGIFADDR: 104930106f6aSPoul-Henning Kamp { 105030106f6aSPoul-Henning Kamp struct sockaddr *sa; 105130106f6aSPoul-Henning Kamp 105230106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 10534a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 105430106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 105530106f6aSPoul-Henning Kamp } 105630106f6aSPoul-Henning Kamp break; 1057fb583156SDavid Greenman 1058fb583156SDavid Greenman case SIOCSIFMTU: 1059fb583156SDavid Greenman /* 1060fb583156SDavid Greenman * Set the interface MTU. 1061fb583156SDavid Greenman */ 1062fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1063fb583156SDavid Greenman error = EINVAL; 1064fb583156SDavid Greenman } else { 1065fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 106630106f6aSPoul-Henning Kamp } 1067fb583156SDavid Greenman break; 1068c1d93b05SSam Leffler default: 1069c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1070c1d93b05SSam Leffler break; 1071fb583156SDavid Greenman } 1072fb583156SDavid Greenman return (error); 107330106f6aSPoul-Henning Kamp } 10741158dfb7SGarrett Wollman 107537c84183SPoul-Henning Kamp static int 107672fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 107772fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 10781158dfb7SGarrett Wollman { 10791158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1080d7647d96SDag-Erling Smørgrav #ifdef INET 10811158dfb7SGarrett Wollman struct sockaddr_in *sin; 1082d7647d96SDag-Erling Smørgrav #endif 108382cd038dSYoshinobu Inoue #ifdef INET6 108482cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 108582cd038dSYoshinobu Inoue #endif 10861158dfb7SGarrett Wollman u_char *e_addr; 10871158dfb7SGarrett Wollman 10881158dfb7SGarrett Wollman switch(sa->sa_family) { 10891158dfb7SGarrett Wollman case AF_LINK: 10907f33a738SJulian Elischer /* 10917f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 10927f33a738SJulian Elischer */ 10931158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 10941158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1095086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 10961158dfb7SGarrett Wollman return EADDRNOTAVAIL; 10971158dfb7SGarrett Wollman *llsa = 0; 10981158dfb7SGarrett Wollman return 0; 10991158dfb7SGarrett Wollman 11001158dfb7SGarrett Wollman #ifdef INET 11011158dfb7SGarrett Wollman case AF_INET: 11021158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 11031158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 11041158dfb7SGarrett Wollman return EADDRNOTAVAIL; 11051158dfb7SGarrett Wollman MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 110609df718eSRobert Watson M_NOWAIT|M_ZERO); 110709df718eSRobert Watson if (sdl == NULL) 110809df718eSRobert Watson return ENOMEM; 11091158dfb7SGarrett Wollman sdl->sdl_len = sizeof *sdl; 11101158dfb7SGarrett Wollman sdl->sdl_family = AF_LINK; 11111158dfb7SGarrett Wollman sdl->sdl_index = ifp->if_index; 11121158dfb7SGarrett Wollman sdl->sdl_type = IFT_ETHER; 11131158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 11141158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 11151158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 11161158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 11171158dfb7SGarrett Wollman return 0; 11181158dfb7SGarrett Wollman #endif 111982cd038dSYoshinobu Inoue #ifdef INET6 112082cd038dSYoshinobu Inoue case AF_INET6: 112182cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1122595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1123595b8a1cSJun-ichiro itojun Hagino /* 1124595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1125595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1126595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1127595b8a1cSJun-ichiro itojun Hagino */ 1128595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1129595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1130595b8a1cSJun-ichiro itojun Hagino return 0; 1131595b8a1cSJun-ichiro itojun Hagino } 113282cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 113382cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 113482cd038dSYoshinobu Inoue MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 113509df718eSRobert Watson M_NOWAIT|M_ZERO); 113609df718eSRobert Watson if (sdl == NULL) 113709df718eSRobert Watson return (ENOMEM); 113882cd038dSYoshinobu Inoue sdl->sdl_len = sizeof *sdl; 113982cd038dSYoshinobu Inoue sdl->sdl_family = AF_LINK; 114082cd038dSYoshinobu Inoue sdl->sdl_index = ifp->if_index; 114182cd038dSYoshinobu Inoue sdl->sdl_type = IFT_ETHER; 114282cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 114382cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 114482cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 114582cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 114682cd038dSYoshinobu Inoue return 0; 114782cd038dSYoshinobu Inoue #endif 11481158dfb7SGarrett Wollman 11491158dfb7SGarrett Wollman default: 11501158dfb7SGarrett Wollman /* 11511158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 11521158dfb7SGarrett Wollman * that counts... 11531158dfb7SGarrett Wollman */ 11541158dfb7SGarrett Wollman return EAFNOSUPPORT; 11551158dfb7SGarrett Wollman } 11561158dfb7SGarrett Wollman } 115740811c14SMatthew N. Dodd 1158fc74a9f9SBrooks Davis static void* 1159fc74a9f9SBrooks Davis ether_alloc(u_char type, struct ifnet *ifp) 1160fc74a9f9SBrooks Davis { 1161fc74a9f9SBrooks Davis struct arpcom *ac; 1162fc74a9f9SBrooks Davis 1163fc74a9f9SBrooks Davis ac = malloc(sizeof(struct arpcom), M_ARPCOM, M_WAITOK | M_ZERO); 1164fc74a9f9SBrooks Davis ac->ac_ifp = ifp; 1165fc74a9f9SBrooks Davis 1166fc74a9f9SBrooks Davis return (ac); 1167fc74a9f9SBrooks Davis } 1168fc74a9f9SBrooks Davis 1169fc74a9f9SBrooks Davis static void 1170fc74a9f9SBrooks Davis ether_free(void *com, u_char type) 1171fc74a9f9SBrooks Davis { 1172fc74a9f9SBrooks Davis 1173fc74a9f9SBrooks Davis free(com, M_ARPCOM); 1174fc74a9f9SBrooks Davis } 1175fc74a9f9SBrooks Davis 1176fc74a9f9SBrooks Davis static int 1177fc74a9f9SBrooks Davis ether_modevent(module_t mod, int type, void *data) 1178fc74a9f9SBrooks Davis { 1179fc74a9f9SBrooks Davis 1180fc74a9f9SBrooks Davis switch (type) { 1181fc74a9f9SBrooks Davis case MOD_LOAD: 1182fc74a9f9SBrooks Davis if_register_com_alloc(IFT_ETHER, ether_alloc, ether_free); 1183fc74a9f9SBrooks Davis break; 1184fc74a9f9SBrooks Davis case MOD_UNLOAD: 1185fc74a9f9SBrooks Davis if_deregister_com_alloc(IFT_ETHER); 1186fc74a9f9SBrooks Davis break; 1187fc74a9f9SBrooks Davis default: 1188fc74a9f9SBrooks Davis return EOPNOTSUPP; 1189fc74a9f9SBrooks Davis } 1190fc74a9f9SBrooks Davis 1191fc74a9f9SBrooks Davis return (0); 1192fc74a9f9SBrooks Davis } 1193fc74a9f9SBrooks Davis 119440811c14SMatthew N. Dodd static moduledata_t ether_mod = { 119540811c14SMatthew N. Dodd "ether", 1196fc74a9f9SBrooks Davis ether_modevent, 119740811c14SMatthew N. Dodd 0 119840811c14SMatthew N. Dodd }; 119940811c14SMatthew N. Dodd 120052f1277eSChristian S.J. Peron void 120152f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 120252f1277eSChristian S.J. Peron { 120352f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 120452f1277eSChristian S.J. Peron struct mbuf mv, mb; 120552f1277eSChristian S.J. Peron 120652f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 120752f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 120852f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 120952f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 121052f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 121152f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 121252f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 121352f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 121452f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 121552f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 121652f1277eSChristian S.J. Peron /* 121752f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 121852f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 121952f1277eSChristian S.J. Peron * 122052f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 122152f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 122252f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 122352f1277eSChristian S.J. Peron * 122452f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 122552f1277eSChristian S.J. Peron */ 122652f1277eSChristian S.J. Peron if (data != NULL) { 122752f1277eSChristian S.J. Peron mv.m_next = m; 122852f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 122952f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 123052f1277eSChristian S.J. Peron mb.m_next = &mv; 123152f1277eSChristian S.J. Peron mb.m_data = data; 123252f1277eSChristian S.J. Peron mb.m_len = dlen; 123352f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 123452f1277eSChristian S.J. Peron } else 123552f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 123652f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 123752f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 123852f1277eSChristian S.J. Peron } 123952f1277eSChristian S.J. Peron 1240fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 124140811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1242