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" 374cf49a43SJulian Elischer #include "opt_netgraph.h" 386eeac1d9SJulian Elischer #include "opt_mbuf_profiling.h" 39430df5f4SEivind Eklund 40df8bae1dSRodney W. Grimes #include <sys/param.h> 41df8bae1dSRodney W. Grimes #include <sys/systm.h> 42df8bae1dSRodney W. Grimes #include <sys/kernel.h> 43385195c0SMarko Zec #include <sys/lock.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> 48385195c0SMarko Zec #include <sys/rwlock.h> 49df8bae1dSRodney W. Grimes #include <sys/socket.h> 5051a53488SBruce Evans #include <sys/sockio.h> 51602d513cSGarrett Wollman #include <sys/sysctl.h> 52df8bae1dSRodney W. Grimes 53df8bae1dSRodney W. Grimes #include <net/if.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> 6560ee3847SMax Laier #include <net/pf_mtag.h> 664b79449eSBjoern A. Zeeb #include <net/vnet.h> 67df8bae1dSRodney W. Grimes 6882cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 69df8bae1dSRodney W. Grimes #include <netinet/in.h> 70df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 71df8bae1dSRodney W. Grimes #include <netinet/if_ether.h> 7254bfbd51SWill Andrews #include <netinet/ip_carp.h> 730bcfa8e4SLuigi Rizzo #include <netinet/ip_var.h> 744b984093SLuigi Rizzo #include <netinet/ip_fw.h> 7570228fb3SLuigi Rizzo #include <netinet/ipfw/ip_fw_private.h> 761d5e9e22SEivind Eklund #endif 7782cd038dSYoshinobu Inoue #ifdef INET6 7882cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 7982cd038dSYoshinobu Inoue #endif 80df8bae1dSRodney W. Grimes 81cc6a66f2SJulian Elischer #ifdef IPX 82cc6a66f2SJulian Elischer #include <netipx/ipx.h> 83cc6a66f2SJulian Elischer #include <netipx/ipx_if.h> 84a1026028SMaxim Sobolev #endif 856e6b3f7cSQing Li 864f93599fSBoris Popov int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m); 875accfb8cSBoris Popov int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp, 882a7e8eceSBoris Popov struct sockaddr *dst, short *tp, int *hlen); 89cc6a66f2SJulian Elischer 90655929bfSJulian Elischer #ifdef NETATALK 91655929bfSJulian Elischer #include <netatalk/at.h> 92655929bfSJulian Elischer #include <netatalk/at_var.h> 93655929bfSJulian Elischer #include <netatalk/at_extern.h> 94655929bfSJulian Elischer 95655929bfSJulian Elischer #define llc_snap_org_code llc_un.type_snap.org_code 96655929bfSJulian Elischer #define llc_snap_ether_type llc_un.type_snap.ether_type 97655929bfSJulian Elischer 98655929bfSJulian Elischer extern u_char at_org_code[3]; 99655929bfSJulian Elischer extern u_char aarp_org_code[3]; 1002cc2df49SGarrett Wollman #endif /* NETATALK */ 1012cc2df49SGarrett Wollman 102aed55708SRobert Watson #include <security/mac/mac_framework.h> 103aed55708SRobert Watson 104d54d93acSEd Maste #ifdef CTASSERT 105d54d93acSEd Maste CTASSERT(sizeof (struct ether_header) == ETHER_ADDR_LEN * 2 + 2); 106d54d93acSEd Maste CTASSERT(sizeof (struct ether_addr) == ETHER_ADDR_LEN); 107d54d93acSEd Maste #endif 108d54d93acSEd Maste 109e1e1452dSArchie Cobbs /* netgraph node hooks for ng_ether(4) */ 110c1d93b05SSam Leffler void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 111c1d93b05SSam Leffler void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 112e1e1452dSArchie Cobbs int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 113e1e1452dSArchie Cobbs void (*ng_ether_attach_p)(struct ifnet *ifp); 114e1e1452dSArchie Cobbs void (*ng_ether_detach_p)(struct ifnet *ifp); 115e1e1452dSArchie Cobbs 116824eb9dcSDavid E. O'Brien void (*vlan_input_p)(struct ifnet *, struct mbuf *); 11754bfbd51SWill Andrews #if defined(INET) || defined(INET6) 11854bfbd51SWill Andrews int (*carp_forus_p)(struct ifnet *, u_char *); 11954bfbd51SWill Andrews int (*carp_output_p)(struct ifnet *, struct mbuf *, struct sockaddr *, 12054bfbd51SWill Andrews struct rtentry *); 12154bfbd51SWill Andrews #endif 1229d4fe4b2SBrooks Davis 123fd6238a6SAndrew Thompson /* if_bridge(4) support */ 1248f867517SAndrew Thompson struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *); 1258f867517SAndrew Thompson int (*bridge_output_p)(struct ifnet *, struct mbuf *, 1268f867517SAndrew Thompson struct sockaddr *, struct rtentry *); 127c8b01292SAndrew Thompson void (*bridge_dn_p)(struct mbuf *, struct ifnet *); 1288f867517SAndrew Thompson 12918242d3bSAndrew Thompson /* if_lagg(4) support */ 13018242d3bSAndrew Thompson struct mbuf *(*lagg_input_p)(struct ifnet *, struct mbuf *); 131b47888ceSAndrew Thompson 132e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 133868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 134868d8b62SMatthew N. Dodd 135929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 136929ddbbbSAlfred Perlstein struct sockaddr *); 137868d8b62SMatthew N. Dodd 138fc74a9f9SBrooks Davis /* XXX: should be in an arp support file, not here */ 139fc74a9f9SBrooks Davis MALLOC_DEFINE(M_ARPCOM, "arpcom", "802.* interface internals"); 140fc74a9f9SBrooks Davis 14169462a82SBruce M Simpson #define ETHER_IS_BROADCAST(addr) \ 14269462a82SBruce M Simpson (bcmp(etherbroadcastaddr, (addr), ETHER_ADDR_LEN) == 0) 14369462a82SBruce M Simpson 1444c8e8c05SJulian Elischer #define senderr(e) do { error = (e); goto bad;} while (0) 145df8bae1dSRodney W. Grimes 146d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 1474b984093SLuigi Rizzo int 148dda10d62SOleg Bulyzhin ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, int shared); 149eddfbb76SRobert Watson static VNET_DEFINE(int, ether_ipfw); 1501e77c105SRobert Watson #define V_ether_ipfw VNET(ether_ipfw) 15144e33a07SMarko Zec #endif 1524b984093SLuigi Rizzo 1536e6b3f7cSQing Li 154df8bae1dSRodney W. Grimes /* 155df8bae1dSRodney W. Grimes * Ethernet output routine. 156df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 157df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 158df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 159df8bae1dSRodney W. Grimes */ 160df8bae1dSRodney W. Grimes int 16172fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 162279aa3d4SKip Macy struct sockaddr *dst, struct route *ro) 163df8bae1dSRodney W. Grimes { 164df8bae1dSRodney W. Grimes short type; 165279aa3d4SKip Macy int error = 0, hdrcmplt = 0; 16664760eb0SWarner Losh u_char esrc[ETHER_ADDR_LEN], edst[ETHER_ADDR_LEN]; 1676e6b3f7cSQing Li struct llentry *lle = NULL; 168279aa3d4SKip Macy struct rtentry *rt0 = NULL; 169098a8c3bSMatthew N. Dodd struct ether_header *eh; 17060ee3847SMax Laier struct pf_mtag *t; 171c54c76ccSOleg Bulyzhin int loop_copy = 1; 172d32864c3SRobert Watson int hlen; /* link layer header length */ 173df8bae1dSRodney W. Grimes 174279aa3d4SKip Macy if (ro != NULL) { 1759fca4f79SQing Li if (!(m->m_flags & (M_BCAST | M_MCAST))) 176279aa3d4SKip Macy lle = ro->ro_lle; 177279aa3d4SKip Macy rt0 = ro->ro_rt; 178279aa3d4SKip Macy } 17943b29369SRobert Watson #ifdef MAC 18030d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 18143b29369SRobert Watson if (error) 18243b29369SRobert Watson senderr(error); 18343b29369SRobert Watson #endif 18443b29369SRobert Watson 1856eeac1d9SJulian Elischer M_PROFILE(m); 186afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 187afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 18813f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 18913f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 190df8bae1dSRodney W. Grimes senderr(ENETDOWN); 1917f760c48SMatthew N. Dodd 19284dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 193df8bae1dSRodney W. Grimes switch (dst->sa_family) { 194df8bae1dSRodney W. Grimes #ifdef INET 195df8bae1dSRodney W. Grimes case AF_INET: 196279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 197279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 198279aa3d4SKip Macy else 1996e6b3f7cSQing Li error = arpresolve(ifp, rt0, m, dst, edst, &lle); 200cd46a114SLuigi Rizzo if (error) 201cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 20234bed8b0SDavid Greenman type = htons(ETHERTYPE_IP); 203df8bae1dSRodney W. Grimes break; 20443a6c75aSMatthew N. Dodd case AF_ARP: 20543a6c75aSMatthew N. Dodd { 20643a6c75aSMatthew N. Dodd struct arphdr *ah; 20743a6c75aSMatthew N. Dodd ah = mtod(m, struct arphdr *); 20843a6c75aSMatthew N. Dodd ah->ar_hrd = htons(ARPHRD_ETHER); 20943a6c75aSMatthew N. Dodd 210c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 21143a6c75aSMatthew N. Dodd 21243a6c75aSMatthew N. Dodd switch(ntohs(ah->ar_op)) { 21343a6c75aSMatthew N. Dodd case ARPOP_REVREQUEST: 21443a6c75aSMatthew N. Dodd case ARPOP_REVREPLY: 21543a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_REVARP); 21643a6c75aSMatthew N. Dodd break; 21743a6c75aSMatthew N. Dodd case ARPOP_REQUEST: 21843a6c75aSMatthew N. Dodd case ARPOP_REPLY: 21943a6c75aSMatthew N. Dodd default: 22043a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_ARP); 22143a6c75aSMatthew N. Dodd break; 22243a6c75aSMatthew N. Dodd } 22343a6c75aSMatthew N. Dodd 22443a6c75aSMatthew N. Dodd if (m->m_flags & M_BCAST) 22543a6c75aSMatthew N. Dodd bcopy(ifp->if_broadcastaddr, edst, ETHER_ADDR_LEN); 22643a6c75aSMatthew N. Dodd else 22743a6c75aSMatthew N. Dodd bcopy(ar_tha(ah), edst, ETHER_ADDR_LEN); 22843a6c75aSMatthew N. Dodd 22943a6c75aSMatthew N. Dodd } 23043a6c75aSMatthew N. Dodd break; 231df8bae1dSRodney W. Grimes #endif 23282cd038dSYoshinobu Inoue #ifdef INET6 23382cd038dSYoshinobu Inoue case AF_INET6: 234279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 235279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 236279aa3d4SKip Macy else 2379928dafbSQing Li error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle); 238cd46a114SLuigi Rizzo if (error) 239cd46a114SLuigi Rizzo return error; 24082cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 24182cd038dSYoshinobu Inoue break; 24282cd038dSYoshinobu Inoue #endif 243cc6a66f2SJulian Elischer #ifdef IPX 244cc6a66f2SJulian Elischer case AF_IPX: 2454f93599fSBoris Popov if (ef_outputp) { 2462a7e8eceSBoris Popov error = ef_outputp(ifp, &m, dst, &type, &hlen); 2475accfb8cSBoris Popov if (error) 2485accfb8cSBoris Popov goto bad; 2494f93599fSBoris Popov } else 25034bed8b0SDavid Greenman type = htons(ETHERTYPE_IPX); 251cc6a66f2SJulian Elischer bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 252cc6a66f2SJulian Elischer (caddr_t)edst, sizeof (edst)); 253cc6a66f2SJulian Elischer break; 254cc6a66f2SJulian Elischer #endif 255655929bfSJulian Elischer #ifdef NETATALK 256655929bfSJulian Elischer case AF_APPLETALK: 2571d0eab59SJulian Elischer { 258ed7509acSJulian Elischer struct at_ifaddr *aa; 2591d0eab59SJulian Elischer 260cd46a114SLuigi Rizzo if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) 261cd46a114SLuigi Rizzo senderr(EHOSTUNREACH); /* XXX */ 2626c7ffe93SRobert Watson if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 2636c7ffe93SRobert Watson ifa_free(&aa->aa_ifa); 2641d0eab59SJulian Elischer return (0); 2656c7ffe93SRobert Watson } 266655929bfSJulian Elischer /* 267ed7509acSJulian Elischer * In the phase 2 case, need to prepend an mbuf for the llc header. 268655929bfSJulian Elischer */ 269655929bfSJulian Elischer if ( aa->aa_flags & AFA_PHASE2 ) { 270655929bfSJulian Elischer struct llc llc; 271655929bfSJulian Elischer 2726c7ffe93SRobert Watson ifa_free(&aa->aa_ifa); 2737e2041e0SRobert Watson M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); 2742166ffe8SRobert Watson if (m == NULL) 2752166ffe8SRobert Watson senderr(ENOBUFS); 276655929bfSJulian Elischer llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 277655929bfSJulian Elischer llc.llc_control = LLC_UI; 278655929bfSJulian Elischer bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 279655929bfSJulian Elischer llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 280797f247bSMatthew N. Dodd bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 28134bed8b0SDavid Greenman type = htons(m->m_pkthdr.len); 282797f247bSMatthew N. Dodd hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN; 283655929bfSJulian Elischer } else { 2846c7ffe93SRobert Watson ifa_free(&aa->aa_ifa); 28534bed8b0SDavid Greenman type = htons(ETHERTYPE_AT); 286655929bfSJulian Elischer } 287655929bfSJulian Elischer break; 288ed7509acSJulian Elischer } 2898cdfefbdSPeter Wemm #endif /* NETATALK */ 290df8bae1dSRodney W. Grimes 291114ae644SMike Smith case pseudo_AF_HDRCMPLT: 292114ae644SMike Smith hdrcmplt = 1; 293114ae644SMike Smith eh = (struct ether_header *)dst->sa_data; 294114ae644SMike Smith (void)memcpy(esrc, eh->ether_shost, sizeof (esrc)); 295114ae644SMike Smith /* FALLTHROUGH */ 296114ae644SMike Smith 297df8bae1dSRodney W. Grimes case AF_UNSPEC: 298c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 299df8bae1dSRodney W. Grimes eh = (struct ether_header *)dst->sa_data; 30094a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 301df8bae1dSRodney W. Grimes type = eh->ether_type; 302df8bae1dSRodney W. Grimes break; 303df8bae1dSRodney W. Grimes 304df8bae1dSRodney W. Grimes default: 30529e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 306df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 307df8bae1dSRodney W. Grimes } 308df8bae1dSRodney W. Grimes 3096e6b3f7cSQing Li if (lle != NULL && (lle->la_flags & LLE_IFADDR)) { 3106e6b3f7cSQing Li int csum_flags = 0; 3116e6b3f7cSQing Li if (m->m_pkthdr.csum_flags & CSUM_IP) 3126e6b3f7cSQing Li csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 3136e6b3f7cSQing Li if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 3146e6b3f7cSQing Li csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 3152f4afd21SRandall Stewart if (m->m_pkthdr.csum_flags & CSUM_SCTP) 3162f4afd21SRandall Stewart csum_flags |= CSUM_SCTP_VALID; 3176e6b3f7cSQing Li m->m_pkthdr.csum_flags |= csum_flags; 3186e6b3f7cSQing Li m->m_pkthdr.csum_data = 0xffff; 3196e6b3f7cSQing Li return (if_simloop(ifp, m, dst->sa_family, 0)); 3206e6b3f7cSQing Li } 3216e6b3f7cSQing Li 322df8bae1dSRodney W. Grimes /* 323df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 324df8bae1dSRodney W. Grimes * allocate another. 325df8bae1dSRodney W. Grimes */ 326797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 3272166ffe8SRobert Watson if (m == NULL) 328df8bae1dSRodney W. Grimes senderr(ENOBUFS); 329df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 33094a5d9b6SDavid Greenman (void)memcpy(&eh->ether_type, &type, 331df8bae1dSRodney W. Grimes sizeof(eh->ether_type)); 33294a5d9b6SDavid Greenman (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); 333114ae644SMike Smith if (hdrcmplt) 334114ae644SMike Smith (void)memcpy(eh->ether_shost, esrc, 335114ae644SMike Smith sizeof(eh->ether_shost)); 336114ae644SMike Smith else 3374a0d6638SRuslan Ermilov (void)memcpy(eh->ether_shost, IF_LLADDR(ifp), 338df8bae1dSRodney W. Grimes sizeof(eh->ether_shost)); 339ed7509acSJulian Elischer 340ed7509acSJulian Elischer /* 341ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 342ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 343ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 344ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 345ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 346ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 347ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 348ed7509acSJulian Elischer */ 349c54c76ccSOleg Bulyzhin if ((ifp->if_flags & IFF_SIMPLEX) && loop_copy && 35060ee3847SMax Laier ((t = pf_find_mtag(m)) == NULL || !t->routed)) { 3513cd67511SJesper Skriver int csum_flags = 0; 3523cd67511SJesper Skriver 3533cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_IP) 3543cd67511SJesper Skriver csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 3553cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 3563cd67511SJesper Skriver csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 3572f4afd21SRandall Stewart if (m->m_pkthdr.csum_flags & CSUM_SCTP) 3582f4afd21SRandall Stewart csum_flags |= CSUM_SCTP_VALID; 35906f684b0SMatthew N. Dodd 360c54c76ccSOleg Bulyzhin if (m->m_flags & M_BCAST) { 36106f684b0SMatthew N. Dodd struct mbuf *n; 362ed7509acSJulian Elischer 363294dd290SLuigi Rizzo /* 364294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 365294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 366294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 367294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 368294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 369294dd290SLuigi Rizzo * extra data copying vs. extra locking). 3709983b3c0SYaroslav Tykhiy * 3719983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 3729983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 3739983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 374294dd290SLuigi Rizzo */ 375294dd290SLuigi Rizzo if ((n = m_dup(m, M_DONTWAIT)) != NULL) { 3763cd67511SJesper Skriver n->m_pkthdr.csum_flags |= csum_flags; 3773cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3783cd67511SJesper Skriver n->m_pkthdr.csum_data = 0xffff; 37906a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 380c1404dc0SArchie Cobbs } else 381c1404dc0SArchie Cobbs ifp->if_iqdrops++; 38206f684b0SMatthew N. Dodd } else if (bcmp(eh->ether_dhost, eh->ether_shost, 38306f684b0SMatthew N. Dodd ETHER_ADDR_LEN) == 0) { 3843cd67511SJesper Skriver m->m_pkthdr.csum_flags |= csum_flags; 3853cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3863cd67511SJesper Skriver m->m_pkthdr.csum_data = 0xffff; 38706a429a3SArchie Cobbs (void) if_simloop(ifp, m, dst->sa_family, hlen); 388ed7509acSJulian Elischer return (0); /* XXX */ 389ed7509acSJulian Elischer } 390ed7509acSJulian Elischer } 3912e2de7f2SArchie Cobbs 3923f7d1396SAndrew Thompson /* 3933f7d1396SAndrew Thompson * Bridges require special output handling. 3943f7d1396SAndrew Thompson */ 3953f7d1396SAndrew Thompson if (ifp->if_bridge) { 3963f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 3973f7d1396SAndrew Thompson return (error); 3983f7d1396SAndrew Thompson } 3993f7d1396SAndrew Thompson 400259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 401a9771948SGleb Smirnoff if (ifp->if_carp && 40254bfbd51SWill Andrews (error = (*carp_output_p)(ifp, m, dst, NULL))) 403a9771948SGleb Smirnoff goto bad; 404a9771948SGleb Smirnoff #endif 405a9771948SGleb Smirnoff 406e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 407eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 408514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 409514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 410e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 411e1e1452dSArchie Cobbs bad: if (m != NULL) 412e1e1452dSArchie Cobbs m_freem(m); 413e1e1452dSArchie Cobbs return (error); 414e1e1452dSArchie Cobbs } 415e1e1452dSArchie Cobbs if (m == NULL) 416e1e1452dSArchie Cobbs return (0); 417e1e1452dSArchie Cobbs } 418e1e1452dSArchie Cobbs 419e1e1452dSArchie Cobbs /* Continue with link-layer output */ 420e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 421e1e1452dSArchie Cobbs } 422e1e1452dSArchie Cobbs 423e1e1452dSArchie Cobbs /* 424e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 425e1e1452dSArchie Cobbs * 426e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 427e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 428e1e1452dSArchie Cobbs */ 429e1e1452dSArchie Cobbs int 430c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 431e1e1452dSArchie Cobbs { 432d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 4332b25acc1SLuigi Rizzo 4340b4b0b0fSJulian Elischer if (V_ip_fw_chk_ptr && V_ether_ipfw != 0) { 435dda10d62SOleg Bulyzhin if (ether_ipfw_chk(&m, ifp, 0) == 0) { 4364b984093SLuigi Rizzo if (m) { 4374b984093SLuigi Rizzo m_freem(m); 438e7909401SDavid Malone return EACCES; /* pkt dropped */ 4394b984093SLuigi Rizzo } else 4404b984093SLuigi Rizzo return 0; /* consumed e.g. in a pipe */ 4414b984093SLuigi Rizzo } 4424b984093SLuigi Rizzo } 443d7647d96SDag-Erling Smørgrav #endif 4442b25acc1SLuigi Rizzo 445df8bae1dSRodney W. Grimes /* 446df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 447df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 448df8bae1dSRodney W. Grimes */ 449aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 450df8bae1dSRodney W. Grimes } 451df8bae1dSRodney W. Grimes 452d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 453df8bae1dSRodney W. Grimes /* 4544b984093SLuigi Rizzo * ipfw processing for ethernet packets (in and out). 4554b984093SLuigi Rizzo * The second parameter is NULL from ether_demux, and ifp from 456b6de9e91SMax Laier * ether_output_frame. 4574b984093SLuigi Rizzo */ 4584b984093SLuigi Rizzo int 459dda10d62SOleg Bulyzhin ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, int shared) 4604b984093SLuigi Rizzo { 461c1d93b05SSam Leffler struct ether_header *eh; 462c1d93b05SSam Leffler struct ether_header save_eh; 463c1d93b05SSam Leffler struct mbuf *m; 4644b984093SLuigi Rizzo int i; 4652b25acc1SLuigi Rizzo struct ip_fw_args args; 466830c6e2bSLuigi Rizzo struct m_tag *mtag; 4674b984093SLuigi Rizzo 4687173b6e5SLuigi Rizzo /* fetch start point from rule, if any */ 4697173b6e5SLuigi Rizzo mtag = m_tag_locate(*m0, MTAG_IPFW_RULE, 0, NULL); 470830c6e2bSLuigi Rizzo if (mtag == NULL) { 4717173b6e5SLuigi Rizzo args.rule.slot = 0; 472de240d10SLuigi Rizzo } else { 473cc4d3c30SLuigi Rizzo /* dummynet packet, already partially processed */ 474cc4d3c30SLuigi Rizzo struct ipfw_rule_ref *r; 475830c6e2bSLuigi Rizzo 4767173b6e5SLuigi Rizzo /* XXX can we free it after use ? */ 477830c6e2bSLuigi Rizzo mtag->m_tag_id = PACKET_TAG_NONE; 478cc4d3c30SLuigi Rizzo r = (struct ipfw_rule_ref *)(mtag + 1); 479cc4d3c30SLuigi Rizzo if (r->info & IPFW_ONEPASS) 480dda10d62SOleg Bulyzhin return (1); 481cc4d3c30SLuigi Rizzo args.rule = *r; 482de240d10SLuigi Rizzo } 4832f8ebbf4SLuigi Rizzo 4844b984093SLuigi Rizzo /* 4852f8ebbf4SLuigi Rizzo * I need some amt of data to be contiguous, and in case others need 4864b984093SLuigi Rizzo * the packet (shared==1) also better be in the first mbuf. 4874b984093SLuigi Rizzo */ 488c1d93b05SSam Leffler m = *m0; 489c1d93b05SSam Leffler i = min( m->m_pkthdr.len, max_protohdr); 490c1d93b05SSam Leffler if ( shared || m->m_len < i) { 491c1d93b05SSam Leffler m = m_pullup(m, i); 492c1d93b05SSam Leffler if (m == NULL) { 493c1d93b05SSam Leffler *m0 = m; 4944b984093SLuigi Rizzo return 0; 4954b984093SLuigi Rizzo } 496c1d93b05SSam Leffler } 497c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 498c1d93b05SSam Leffler save_eh = *eh; /* save copy for restore below */ 499c1d93b05SSam Leffler m_adj(m, ETHER_HDR_LEN); /* strip ethernet header */ 5004b984093SLuigi Rizzo 501c1d93b05SSam Leffler args.m = m; /* the packet we are looking at */ 5022b25acc1SLuigi Rizzo args.oif = dst; /* destination, if any */ 5032b25acc1SLuigi Rizzo args.next_hop = NULL; /* we do not support forward yet */ 5042b25acc1SLuigi Rizzo args.eh = &save_eh; /* MAC header for bridged/MAC packets */ 5053ecf1851SOleg Bulyzhin args.inp = NULL; /* used by ipfw uid/gid/jail rules */ 5060b4b0b0fSJulian Elischer i = V_ip_fw_chk_ptr(&args); 507c1d93b05SSam Leffler m = args.m; 508c1d93b05SSam Leffler if (m != NULL) { 509c1d93b05SSam Leffler /* 510c1d93b05SSam Leffler * Restore Ethernet header, as needed, in case the 511c1d93b05SSam Leffler * mbuf chain was replaced by ipfw. 512c1d93b05SSam Leffler */ 513a163d034SWarner Losh M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 514c1d93b05SSam Leffler if (m == NULL) { 515c1d93b05SSam Leffler *m0 = m; 516c1d93b05SSam Leffler return 0; 517c1d93b05SSam Leffler } 518c1d93b05SSam Leffler if (eh != mtod(m, struct ether_header *)) 519c1d93b05SSam Leffler bcopy(&save_eh, mtod(m, struct ether_header *), 520c1d93b05SSam Leffler ETHER_HDR_LEN); 521c1d93b05SSam Leffler } 522c1d93b05SSam Leffler *m0 = m; 5232b25acc1SLuigi Rizzo 5246c69a7c3SGleb Smirnoff if (i == IP_FW_DENY) /* drop */ 5254b984093SLuigi Rizzo return 0; 5264b984093SLuigi Rizzo 5276c69a7c3SGleb Smirnoff KASSERT(m != NULL, ("ether_ipfw_chk: m is NULL")); 5286c69a7c3SGleb Smirnoff 5296c69a7c3SGleb Smirnoff if (i == IP_FW_PASS) /* a PASS rule. */ 5304b984093SLuigi Rizzo return 1; 5314b984093SLuigi Rizzo 532115a40c7SLuigi Rizzo if (ip_dn_io_ptr && (i == IP_FW_DUMMYNET)) { 533830c6e2bSLuigi Rizzo int dir; 5344b984093SLuigi Rizzo /* 5354b984093SLuigi Rizzo * Pass the pkt to dummynet, which consumes it. 5364b984093SLuigi Rizzo * If shared, make a copy and keep the original. 5374b984093SLuigi Rizzo */ 5384b984093SLuigi Rizzo if (shared) { 539a163d034SWarner Losh m = m_copypacket(m, M_DONTWAIT); 5402b25acc1SLuigi Rizzo if (m == NULL) 5414b984093SLuigi Rizzo return 0; 5424b984093SLuigi Rizzo } else { 5432b25acc1SLuigi Rizzo /* 544c1d93b05SSam Leffler * Pass the original to dummynet and 545c1d93b05SSam Leffler * nothing back to the caller 5462b25acc1SLuigi Rizzo */ 547c1d93b05SSam Leffler *m0 = NULL ; 5484b984093SLuigi Rizzo } 549830c6e2bSLuigi Rizzo dir = PROTO_LAYER2 | (dst ? DIR_OUT : DIR_IN); 550830c6e2bSLuigi Rizzo ip_dn_io_ptr(&m, dir, &args); 5514b984093SLuigi Rizzo return 0; 5524b984093SLuigi Rizzo } 5534b984093SLuigi Rizzo /* 5542f8ebbf4SLuigi Rizzo * XXX at some point add support for divert/forward actions. 5552f8ebbf4SLuigi Rizzo * If none of the above matches, we have to drop the pkt. 5564b984093SLuigi Rizzo */ 5574b984093SLuigi Rizzo return 0; 5584b984093SLuigi Rizzo } 559d7647d96SDag-Erling Smørgrav #endif 5604b984093SLuigi Rizzo 5614b984093SLuigi Rizzo /* 562c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 563c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 564df8bae1dSRodney W. Grimes */ 565c1d93b05SSam Leffler static void 566c1d93b05SSam Leffler ether_input(struct ifnet *ifp, struct mbuf *m) 567df8bae1dSRodney W. Grimes { 568c1d93b05SSam Leffler struct ether_header *eh; 569c1d93b05SSam Leffler u_short etype; 570df8bae1dSRodney W. Grimes 57169462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 57269462a82SBruce M Simpson m_freem(m); 57369462a82SBruce M Simpson return; 57469462a82SBruce M Simpson } 57569462a82SBruce M Simpson #ifdef DIAGNOSTIC 57669462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 57769462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 57869462a82SBruce M Simpson m_freem(m); 57969462a82SBruce M Simpson return; 58069462a82SBruce M Simpson } 58169462a82SBruce M Simpson #endif 582c1d93b05SSam Leffler /* 583c1d93b05SSam Leffler * Do consistency checks to verify assumptions 584c1d93b05SSam Leffler * made by code past this point. 585c1d93b05SSam Leffler */ 586c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 587c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 588c1d93b05SSam Leffler ifp->if_ierrors++; 589c939f1aeSLuigi Rizzo m_freem(m); 590c939f1aeSLuigi Rizzo return; 591c939f1aeSLuigi Rizzo } 592797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 593c1d93b05SSam Leffler /* XXX maybe should pullup? */ 594c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 595c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 596c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 597c1d93b05SSam Leffler ifp->if_ierrors++; 598c1d93b05SSam Leffler m_freem(m); 599c1d93b05SSam Leffler return; 6002e2de7f2SArchie Cobbs } 601c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 602c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 603c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 604c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 605c1d93b05SSam Leffler ifp->if_ierrors++; 606c1d93b05SSam Leffler m_freem(m); 607c1d93b05SSam Leffler return; 608c1d93b05SSam Leffler } 609c1d93b05SSam Leffler #ifdef DIAGNOSTIC 610c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 6119bf40edeSBrooks Davis if_printf(ifp, "Warning, frame marked as received on %s\n", 6129bf40edeSBrooks Davis m->m_pkthdr.rcvif->if_xname); 613c1d93b05SSam Leffler } 614c1d93b05SSam Leffler #endif 615c1d93b05SSam Leffler 61621ca7b57SMarko Zec CURVNET_SET_QUIET(ifp->if_vnet); 61721ca7b57SMarko Zec 61869462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 61969462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 62069462a82SBruce M Simpson m->m_flags |= M_BCAST; 62169462a82SBruce M Simpson else 62269462a82SBruce M Simpson m->m_flags |= M_MCAST; 62369462a82SBruce M Simpson ifp->if_imcasts++; 62469462a82SBruce M Simpson } 62569462a82SBruce M Simpson 626533d8562SRobert Watson #ifdef MAC 627533d8562SRobert Watson /* 628533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 629533d8562SRobert Watson * consumers can get to it. 630533d8562SRobert Watson */ 63130d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 632533d8562SRobert Watson #endif 633533d8562SRobert Watson 634c1d93b05SSam Leffler /* 63569462a82SBruce M Simpson * Give bpf a chance at the packet. 636c1d93b05SSam Leffler */ 637d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 6382e2de7f2SArchie Cobbs 63969462a82SBruce M Simpson /* 64069462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 64169462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 64269462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 64369462a82SBruce M Simpson */ 644c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 645c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 646c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 647c1d93b05SSam Leffler } 648c1d93b05SSam Leffler 649c1d93b05SSam Leffler ifp->if_ibytes += m->m_pkthdr.len; 65005463bb5SDavid Greenman 65169462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 652de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 653de572b37SChristian S.J. Peron m_freem(m); 65421ca7b57SMarko Zec CURVNET_RESTORE(); 655de572b37SChristian S.J. Peron return; 656de572b37SChristian S.J. Peron } 657de572b37SChristian S.J. Peron 65818242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 659b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 66018242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 66118242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 66218242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 663b47888ceSAndrew Thompson if (m != NULL) 664b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 665b47888ceSAndrew Thompson else 666b47888ceSAndrew Thompson return; 667b47888ceSAndrew Thompson } 668b47888ceSAndrew Thompson 66969462a82SBruce M Simpson /* 67069462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 67169462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 67269462a82SBruce M Simpson * path correctly. 67369462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 67469462a82SBruce M Simpson */ 67569462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 67669462a82SBruce M Simpson struct ether_vlan_header *evl; 67769462a82SBruce M Simpson 67869462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 67969462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 680402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 68169462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 682402d5e27SBruce M Simpson #endif 68369462a82SBruce M Simpson ifp->if_ierrors++; 68469462a82SBruce M Simpson m_freem(m); 68569462a82SBruce M Simpson return; 68669462a82SBruce M Simpson } 68769462a82SBruce M Simpson 68869462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 68969462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 69069462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 69169462a82SBruce M Simpson 69269462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 69369462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 69469462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 69569462a82SBruce M Simpson } 69669462a82SBruce M Simpson 69769462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 698eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 699514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 70069462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 70169462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 702c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 70321ca7b57SMarko Zec if (m == NULL) { 70421ca7b57SMarko Zec CURVNET_RESTORE(); 705e1e1452dSArchie Cobbs return; 706e1e1452dSArchie Cobbs } 70721ca7b57SMarko Zec } 708e1e1452dSArchie Cobbs 7098f867517SAndrew Thompson /* 71069462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 71169462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 71269462a82SBruce M Simpson * and the frame should be delivered locally. 7138f867517SAndrew Thompson */ 71469462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 71569462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 716fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 71721ca7b57SMarko Zec if (m == NULL) { 71821ca7b57SMarko Zec CURVNET_RESTORE(); 7198f867517SAndrew Thompson return; 7208f867517SAndrew Thompson } 72121ca7b57SMarko Zec } 7228f867517SAndrew Thompson 723259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 72469462a82SBruce M Simpson /* 72569462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 72669462a82SBruce M Simpson * mbuf flows up to Layer 3. 72769462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 72869462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 72969462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 73069462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 73169462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 73269462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 73369462a82SBruce M Simpson */ 73454bfbd51SWill Andrews if (ifp->if_carp && (*carp_forus_p)(ifp, eh->ether_dhost)) { 73569462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 73669462a82SBruce M Simpson } else 73769462a82SBruce M Simpson #endif 73869462a82SBruce M Simpson { 73969462a82SBruce M Simpson /* 740e7f8c833SBruce M Simpson * If the frame received was not for our MAC address, set the 74169462a82SBruce M Simpson * M_PROMISC flag on the mbuf chain. The frame may need to 74269462a82SBruce M Simpson * be seen by the rest of the Ethernet input path in case of 74369462a82SBruce M Simpson * re-entry (e.g. bridge, vlan, netgraph) but should not be 74469462a82SBruce M Simpson * seen by upper protocol layers. 74569462a82SBruce M Simpson */ 74669462a82SBruce M Simpson if (!ETHER_IS_MULTICAST(eh->ether_dhost) && 747e7f8c833SBruce M Simpson bcmp(IF_LLADDR(ifp), eh->ether_dhost, ETHER_ADDR_LEN) != 0) 74869462a82SBruce M Simpson m->m_flags |= M_PROMISC; 74969462a82SBruce M Simpson } 75069462a82SBruce M Simpson 751a6ddbff0SPoul-Henning Kamp /* First chunk of an mbuf contains good entropy */ 75210b1fde0SMark Murray if (harvest.ethernet) 75310b1fde0SMark Murray random_harvest(m, 16, 3, 0, RANDOM_NET); 75469462a82SBruce M Simpson 755acf032f5SRobert Watson ether_demux(ifp, m); 75621ca7b57SMarko Zec CURVNET_RESTORE(); 757e1e1452dSArchie Cobbs } 758e1e1452dSArchie Cobbs 759e1e1452dSArchie Cobbs /* 760e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 761e1e1452dSArchie Cobbs */ 762e1e1452dSArchie Cobbs void 763c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 764e1e1452dSArchie Cobbs { 765c1d93b05SSam Leffler struct ether_header *eh; 7661cafed39SJonathan Lemon int isr; 767e1e1452dSArchie Cobbs u_short ether_type; 768e1e1452dSArchie Cobbs #if defined(NETATALK) 769098a8c3bSMatthew N. Dodd struct llc *l; 770e1e1452dSArchie Cobbs #endif 77169462a82SBruce M Simpson 77269462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 77369462a82SBruce M Simpson 774d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 77569462a82SBruce M Simpson /* 77669462a82SBruce M Simpson * Allow dummynet and/or ipfw to claim the frame. 77769462a82SBruce M Simpson * Do not do this for PROMISC frames in case we are re-entered. 77869462a82SBruce M Simpson */ 7790b4b0b0fSJulian Elischer if (V_ip_fw_chk_ptr && V_ether_ipfw != 0 && !(m->m_flags & M_PROMISC)) { 780dda10d62SOleg Bulyzhin if (ether_ipfw_chk(&m, NULL, 0) == 0) { 78169462a82SBruce M Simpson if (m) 78269462a82SBruce M Simpson m_freem(m); /* dropped; free mbuf chain */ 78369462a82SBruce M Simpson return; /* consumed */ 78469462a82SBruce M Simpson } 78569462a82SBruce M Simpson } 786d7647d96SDag-Erling Smørgrav #endif 787c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 788cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 789c1d93b05SSam Leffler 790a9771948SGleb Smirnoff /* 79169462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 79269462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 793a9771948SGleb Smirnoff */ 79469462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 79569462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 79675ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 7976c23e6ccSRuslan Ermilov ifp->if_noproto++; 7986c23e6ccSRuslan Ermilov m_freem(m); 7996c23e6ccSRuslan Ermilov return; 8006c23e6ccSRuslan Ermilov } 80169462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 80269462a82SBruce M Simpson __func__)); 80369462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 80469462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 805c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 806c1d93b05SSam Leffler return; 807c1d93b05SSam Leffler } 808c1d93b05SSam Leffler 809c1d93b05SSam Leffler /* 81069462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 81169462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 812c1d93b05SSam Leffler */ 81369462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 814c1d93b05SSam Leffler m_freem(m); 815c1d93b05SSam Leffler return; 816c1d93b05SSam Leffler } 817c1d93b05SSam Leffler 81869462a82SBruce M Simpson /* 81969462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 82069462a82SBruce M Simpson * Strip off Ethernet header. 82169462a82SBruce M Simpson */ 82269462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 82369462a82SBruce M Simpson m->m_flags &= ~(M_PROTOFLAGS); 824797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 825c1d93b05SSam Leffler 82669462a82SBruce M Simpson /* 82769462a82SBruce M Simpson * Dispatch frame to upper layer. 82869462a82SBruce M Simpson */ 829307d80beSDavid Greenman switch (ether_type) { 830df8bae1dSRodney W. Grimes #ifdef INET 831df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 8325d691e6dSAndre Oppermann if ((m = ip_fastforward(m)) == NULL) 8331f91d8c5SDavid Greenman return; 8341cafed39SJonathan Lemon isr = NETISR_IP; 835df8bae1dSRodney W. Grimes break; 836df8bae1dSRodney W. Grimes 837df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 83808aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 83908aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 84008aadfbbSJonathan Lemon m_freem(m); 84108aadfbbSJonathan Lemon return; 84208aadfbbSJonathan Lemon } 8431cafed39SJonathan Lemon isr = NETISR_ARP; 844df8bae1dSRodney W. Grimes break; 845df8bae1dSRodney W. Grimes #endif 846cc6a66f2SJulian Elischer #ifdef IPX 847cc6a66f2SJulian Elischer case ETHERTYPE_IPX: 8484f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 8494f93599fSBoris Popov return; 8501cafed39SJonathan Lemon isr = NETISR_IPX; 851cc6a66f2SJulian Elischer break; 852cc6a66f2SJulian Elischer #endif 85382cd038dSYoshinobu Inoue #ifdef INET6 85482cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 8551cafed39SJonathan Lemon isr = NETISR_IPV6; 85682cd038dSYoshinobu Inoue break; 85782cd038dSYoshinobu Inoue #endif 858655929bfSJulian Elischer #ifdef NETATALK 859655929bfSJulian Elischer case ETHERTYPE_AT: 8601cafed39SJonathan Lemon isr = NETISR_ATALK1; 861655929bfSJulian Elischer break; 862655929bfSJulian Elischer case ETHERTYPE_AARP: 8631cafed39SJonathan Lemon isr = NETISR_AARP; 8641cafed39SJonathan Lemon break; 8658cdfefbdSPeter Wemm #endif /* NETATALK */ 866df8bae1dSRodney W. Grimes default: 8674f93599fSBoris Popov #ifdef IPX 8684f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 8694f93599fSBoris Popov return; 8704f93599fSBoris Popov #endif /* IPX */ 871242c5536SPeter Wemm #if defined(NETATALK) 872307d80beSDavid Greenman if (ether_type > ETHERMTU) 873c1d93b05SSam Leffler goto discard; 874df8bae1dSRodney W. Grimes l = mtod(m, struct llc *); 8751cafed39SJonathan Lemon if (l->llc_dsap == LLC_SNAP_LSAP && 8761cafed39SJonathan Lemon l->llc_ssap == LLC_SNAP_LSAP && 8771cafed39SJonathan Lemon l->llc_control == LLC_UI) { 8784158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], at_org_code, 879655929bfSJulian Elischer sizeof(at_org_code)) == 0 && 880655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 881797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8821cafed39SJonathan Lemon isr = NETISR_ATALK2; 883655929bfSJulian Elischer break; 884655929bfSJulian Elischer } 8854158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 886655929bfSJulian Elischer sizeof(aarp_org_code)) == 0 && 887655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 888797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8891cafed39SJonathan Lemon isr = NETISR_AARP; 890655929bfSJulian Elischer break; 891df8bae1dSRodney W. Grimes } 8921cafed39SJonathan Lemon } 893242c5536SPeter Wemm #endif /* NETATALK */ 8941cafed39SJonathan Lemon goto discard; 895df8bae1dSRodney W. Grimes } 8961cafed39SJonathan Lemon netisr_dispatch(isr, m); 897c1d93b05SSam Leffler return; 8981cafed39SJonathan Lemon 899c1d93b05SSam Leffler discard: 900c1d93b05SSam Leffler /* 901c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 902c1d93b05SSam Leffler * hand the packet to it for last chance processing; 903c1d93b05SSam Leffler * otherwise dispose of it. 904c1d93b05SSam Leffler */ 905eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 906514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 907514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 908c1d93b05SSam Leffler /* 909c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 910c1d93b05SSam Leffler * consistent view of inbound packets. 911c1d93b05SSam Leffler */ 912797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 913c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 914c1d93b05SSam Leffler return; 915c1d93b05SSam Leffler } 916c1d93b05SSam Leffler m_freem(m); 917c1d93b05SSam Leffler } 918c1d93b05SSam Leffler 919c1d93b05SSam Leffler /* 920c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 921c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 922c1d93b05SSam Leffler * 923c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 924c1d93b05SSam Leffler * 925c1d93b05SSam Leffler * since there's no static buffer involved. 926c1d93b05SSam Leffler */ 927c1d93b05SSam Leffler char * 928c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 929c1d93b05SSam Leffler { 930c1d93b05SSam Leffler static char etherbuf[18]; 931c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 932c1d93b05SSam Leffler return (etherbuf); 933df8bae1dSRodney W. Grimes } 934df8bae1dSRodney W. Grimes 935df8bae1dSRodney W. Grimes /* 936df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 937df8bae1dSRodney W. Grimes */ 938df8bae1dSRodney W. Grimes void 939d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 940df8bae1dSRodney W. Grimes { 941f93dfa28SBrooks Davis int i; 942098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 943098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 944df8bae1dSRodney W. Grimes 945c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 946c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 947cfeff1b6SJonathan Lemon if_attach(ifp); 948df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 949c1d93b05SSam Leffler ifp->if_output = ether_output; 950c1d93b05SSam Leffler ifp->if_input = ether_input; 9511158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 952a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 953c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 954322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 955c1d93b05SSam Leffler 9564a0d6638SRuslan Ermilov ifa = ifp->if_addr; 9576e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 95859562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 959df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 960df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 961d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 962c1d93b05SSam Leffler 963797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 964e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 965e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 966e3bbbec2SMatthew N. Dodd 967f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 968f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 969d09ed26fSRuslan Ermilov if (lla[i] != 0) 970f93dfa28SBrooks Davis break; 971f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 972d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 973e1e1452dSArchie Cobbs } 974e1e1452dSArchie Cobbs 97521b8ebd9SArchie Cobbs /* 97621b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 97721b8ebd9SArchie Cobbs */ 97821b8ebd9SArchie Cobbs void 979c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 98021b8ebd9SArchie Cobbs { 981514bcb89SPoul-Henning Kamp if (IFP2AC(ifp)->ac_netgraph != NULL) { 982514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 983514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 98421b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 985514bcb89SPoul-Henning Kamp } 98620a65f37SAndrew Thompson 98721b8ebd9SArchie Cobbs bpfdetach(ifp); 98821b8ebd9SArchie Cobbs if_detach(ifp); 98921b8ebd9SArchie Cobbs } 99021b8ebd9SArchie Cobbs 991ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 992602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 993d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 994eddfbb76SRobert Watson SYSCTL_VNET_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW, 995eddfbb76SRobert Watson &VNET_NAME(ether_ipfw), 0, "Pass ether pkts through firewall"); 996d7647d96SDag-Erling Smørgrav #endif 99730106f6aSPoul-Henning Kamp 99816b4a343SChristian Weisgerber #if 0 99916b4a343SChristian Weisgerber /* 100016b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 100116b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 100216b4a343SChristian Weisgerber * than the double-loop. 100316b4a343SChristian Weisgerber */ 100416b4a343SChristian Weisgerber uint32_t 100516b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 100616b4a343SChristian Weisgerber { 100716b4a343SChristian Weisgerber size_t i; 100816b4a343SChristian Weisgerber uint32_t crc; 100916b4a343SChristian Weisgerber int bit; 101016b4a343SChristian Weisgerber uint8_t data; 101116b4a343SChristian Weisgerber 101216b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 101316b4a343SChristian Weisgerber 101416b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 1015933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 101616b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 101716b4a343SChristian Weisgerber crc >>= 1; 101816b4a343SChristian Weisgerber if (carry) 101916b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 102016b4a343SChristian Weisgerber } 1021933dad75SAntoine Brodin } 102216b4a343SChristian Weisgerber 102316b4a343SChristian Weisgerber return (crc); 102416b4a343SChristian Weisgerber } 102516b4a343SChristian Weisgerber #else 102616b4a343SChristian Weisgerber uint32_t 102716b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 102816b4a343SChristian Weisgerber { 102916b4a343SChristian Weisgerber static const uint32_t crctab[] = { 103016b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 103116b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 103216b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 103316b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 103416b4a343SChristian Weisgerber }; 103516b4a343SChristian Weisgerber size_t i; 103616b4a343SChristian Weisgerber uint32_t crc; 103716b4a343SChristian Weisgerber 103816b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 103916b4a343SChristian Weisgerber 104016b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 104116b4a343SChristian Weisgerber crc ^= buf[i]; 104216b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 104316b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 104416b4a343SChristian Weisgerber } 104516b4a343SChristian Weisgerber 104616b4a343SChristian Weisgerber return (crc); 104716b4a343SChristian Weisgerber } 104816b4a343SChristian Weisgerber #endif 104916b4a343SChristian Weisgerber 105016b4a343SChristian Weisgerber uint32_t 105116b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 105216b4a343SChristian Weisgerber { 105316b4a343SChristian Weisgerber size_t i; 105416b4a343SChristian Weisgerber uint32_t crc, carry; 105516b4a343SChristian Weisgerber int bit; 105616b4a343SChristian Weisgerber uint8_t data; 105716b4a343SChristian Weisgerber 105816b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 105916b4a343SChristian Weisgerber 106016b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 106116b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 106216b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 106316b4a343SChristian Weisgerber crc <<= 1; 106416b4a343SChristian Weisgerber if (carry) 106516b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 106616b4a343SChristian Weisgerber } 106716b4a343SChristian Weisgerber } 106816b4a343SChristian Weisgerber 106916b4a343SChristian Weisgerber return (crc); 107016b4a343SChristian Weisgerber } 107116b4a343SChristian Weisgerber 1072fb583156SDavid Greenman int 1073995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 107430106f6aSPoul-Henning Kamp { 107530106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 107630106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 1077fb583156SDavid Greenman int error = 0; 107830106f6aSPoul-Henning Kamp 107930106f6aSPoul-Henning Kamp switch (command) { 108030106f6aSPoul-Henning Kamp case SIOCSIFADDR: 108130106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 108230106f6aSPoul-Henning Kamp 108330106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 108430106f6aSPoul-Henning Kamp #ifdef INET 108530106f6aSPoul-Henning Kamp case AF_INET: 108630106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1087322dcb8dSMax Khon arp_ifinit(ifp, ifa); 108830106f6aSPoul-Henning Kamp break; 108930106f6aSPoul-Henning Kamp #endif 109030106f6aSPoul-Henning Kamp #ifdef IPX 109130106f6aSPoul-Henning Kamp /* 109230106f6aSPoul-Henning Kamp * XXX - This code is probably wrong 109330106f6aSPoul-Henning Kamp */ 109430106f6aSPoul-Henning Kamp case AF_IPX: 109530106f6aSPoul-Henning Kamp { 1096098a8c3bSMatthew N. Dodd struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 109730106f6aSPoul-Henning Kamp 109830106f6aSPoul-Henning Kamp if (ipx_nullhost(*ina)) 109930106f6aSPoul-Henning Kamp ina->x_host = 110086101139SPoul-Henning Kamp *(union ipx_host *) 11014a0d6638SRuslan Ermilov IF_LLADDR(ifp); 110230106f6aSPoul-Henning Kamp else { 110330106f6aSPoul-Henning Kamp bcopy((caddr_t) ina->x_host.c_host, 11044a0d6638SRuslan Ermilov (caddr_t) IF_LLADDR(ifp), 1105fc74a9f9SBrooks Davis ETHER_ADDR_LEN); 110630106f6aSPoul-Henning Kamp } 110730106f6aSPoul-Henning Kamp 110830106f6aSPoul-Henning Kamp /* 110930106f6aSPoul-Henning Kamp * Set new address 111030106f6aSPoul-Henning Kamp */ 111130106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 111230106f6aSPoul-Henning Kamp break; 111330106f6aSPoul-Henning Kamp } 111430106f6aSPoul-Henning Kamp #endif 111530106f6aSPoul-Henning Kamp default: 111630106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 111730106f6aSPoul-Henning Kamp break; 111830106f6aSPoul-Henning Kamp } 111930106f6aSPoul-Henning Kamp break; 112030106f6aSPoul-Henning Kamp 112130106f6aSPoul-Henning Kamp case SIOCGIFADDR: 112230106f6aSPoul-Henning Kamp { 112330106f6aSPoul-Henning Kamp struct sockaddr *sa; 112430106f6aSPoul-Henning Kamp 112530106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 11264a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 112730106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 112830106f6aSPoul-Henning Kamp } 112930106f6aSPoul-Henning Kamp break; 1130fb583156SDavid Greenman 1131fb583156SDavid Greenman case SIOCSIFMTU: 1132fb583156SDavid Greenman /* 1133fb583156SDavid Greenman * Set the interface MTU. 1134fb583156SDavid Greenman */ 1135fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1136fb583156SDavid Greenman error = EINVAL; 1137fb583156SDavid Greenman } else { 1138fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 113930106f6aSPoul-Henning Kamp } 1140fb583156SDavid Greenman break; 1141c1d93b05SSam Leffler default: 1142c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1143c1d93b05SSam Leffler break; 1144fb583156SDavid Greenman } 1145fb583156SDavid Greenman return (error); 114630106f6aSPoul-Henning Kamp } 11471158dfb7SGarrett Wollman 114837c84183SPoul-Henning Kamp static int 114972fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 115072fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 11511158dfb7SGarrett Wollman { 11521158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1153d7647d96SDag-Erling Smørgrav #ifdef INET 11541158dfb7SGarrett Wollman struct sockaddr_in *sin; 1155d7647d96SDag-Erling Smørgrav #endif 115682cd038dSYoshinobu Inoue #ifdef INET6 115782cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 115882cd038dSYoshinobu Inoue #endif 11591158dfb7SGarrett Wollman u_char *e_addr; 11601158dfb7SGarrett Wollman 11611158dfb7SGarrett Wollman switch(sa->sa_family) { 11621158dfb7SGarrett Wollman case AF_LINK: 11637f33a738SJulian Elischer /* 11647f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 11657f33a738SJulian Elischer */ 11661158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 11671158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1168086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 11691158dfb7SGarrett Wollman return EADDRNOTAVAIL; 11701158dfb7SGarrett Wollman *llsa = 0; 11711158dfb7SGarrett Wollman return 0; 11721158dfb7SGarrett Wollman 11731158dfb7SGarrett Wollman #ifdef INET 11741158dfb7SGarrett Wollman case AF_INET: 11751158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 11761158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 11771158dfb7SGarrett Wollman return EADDRNOTAVAIL; 11781ede983cSDag-Erling Smørgrav sdl = malloc(sizeof *sdl, M_IFMADDR, 117909df718eSRobert Watson M_NOWAIT|M_ZERO); 118009df718eSRobert Watson if (sdl == NULL) 118109df718eSRobert Watson return ENOMEM; 11821158dfb7SGarrett Wollman sdl->sdl_len = sizeof *sdl; 11831158dfb7SGarrett Wollman sdl->sdl_family = AF_LINK; 11841158dfb7SGarrett Wollman sdl->sdl_index = ifp->if_index; 11851158dfb7SGarrett Wollman sdl->sdl_type = IFT_ETHER; 11861158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 11871158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 11881158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 11891158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 11901158dfb7SGarrett Wollman return 0; 11911158dfb7SGarrett Wollman #endif 119282cd038dSYoshinobu Inoue #ifdef INET6 119382cd038dSYoshinobu Inoue case AF_INET6: 119482cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1195595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1196595b8a1cSJun-ichiro itojun Hagino /* 1197595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1198595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1199595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1200595b8a1cSJun-ichiro itojun Hagino */ 1201595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1202595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1203595b8a1cSJun-ichiro itojun Hagino return 0; 1204595b8a1cSJun-ichiro itojun Hagino } 120582cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 120682cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 12071ede983cSDag-Erling Smørgrav sdl = malloc(sizeof *sdl, M_IFMADDR, 120809df718eSRobert Watson M_NOWAIT|M_ZERO); 120909df718eSRobert Watson if (sdl == NULL) 121009df718eSRobert Watson return (ENOMEM); 121182cd038dSYoshinobu Inoue sdl->sdl_len = sizeof *sdl; 121282cd038dSYoshinobu Inoue sdl->sdl_family = AF_LINK; 121382cd038dSYoshinobu Inoue sdl->sdl_index = ifp->if_index; 121482cd038dSYoshinobu Inoue sdl->sdl_type = IFT_ETHER; 121582cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 121682cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 121782cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 121882cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 121982cd038dSYoshinobu Inoue return 0; 122082cd038dSYoshinobu Inoue #endif 12211158dfb7SGarrett Wollman 12221158dfb7SGarrett Wollman default: 12231158dfb7SGarrett Wollman /* 12241158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 12251158dfb7SGarrett Wollman * that counts... 12261158dfb7SGarrett Wollman */ 12271158dfb7SGarrett Wollman return EAFNOSUPPORT; 12281158dfb7SGarrett Wollman } 12291158dfb7SGarrett Wollman } 123040811c14SMatthew N. Dodd 1231fc74a9f9SBrooks Davis static void* 1232fc74a9f9SBrooks Davis ether_alloc(u_char type, struct ifnet *ifp) 1233fc74a9f9SBrooks Davis { 1234fc74a9f9SBrooks Davis struct arpcom *ac; 1235fc74a9f9SBrooks Davis 1236fc74a9f9SBrooks Davis ac = malloc(sizeof(struct arpcom), M_ARPCOM, M_WAITOK | M_ZERO); 1237fc74a9f9SBrooks Davis ac->ac_ifp = ifp; 1238fc74a9f9SBrooks Davis 1239fc74a9f9SBrooks Davis return (ac); 1240fc74a9f9SBrooks Davis } 1241fc74a9f9SBrooks Davis 1242fc74a9f9SBrooks Davis static void 1243fc74a9f9SBrooks Davis ether_free(void *com, u_char type) 1244fc74a9f9SBrooks Davis { 1245fc74a9f9SBrooks Davis 1246fc74a9f9SBrooks Davis free(com, M_ARPCOM); 1247fc74a9f9SBrooks Davis } 1248fc74a9f9SBrooks Davis 1249fc74a9f9SBrooks Davis static int 1250fc74a9f9SBrooks Davis ether_modevent(module_t mod, int type, void *data) 1251fc74a9f9SBrooks Davis { 1252fc74a9f9SBrooks Davis 1253fc74a9f9SBrooks Davis switch (type) { 1254fc74a9f9SBrooks Davis case MOD_LOAD: 1255fc74a9f9SBrooks Davis if_register_com_alloc(IFT_ETHER, ether_alloc, ether_free); 1256fc74a9f9SBrooks Davis break; 1257fc74a9f9SBrooks Davis case MOD_UNLOAD: 1258fc74a9f9SBrooks Davis if_deregister_com_alloc(IFT_ETHER); 1259fc74a9f9SBrooks Davis break; 1260fc74a9f9SBrooks Davis default: 1261fc74a9f9SBrooks Davis return EOPNOTSUPP; 1262fc74a9f9SBrooks Davis } 1263fc74a9f9SBrooks Davis 1264fc74a9f9SBrooks Davis return (0); 1265fc74a9f9SBrooks Davis } 1266fc74a9f9SBrooks Davis 126740811c14SMatthew N. Dodd static moduledata_t ether_mod = { 126840811c14SMatthew N. Dodd "ether", 1269fc74a9f9SBrooks Davis ether_modevent, 127040811c14SMatthew N. Dodd 0 127140811c14SMatthew N. Dodd }; 127240811c14SMatthew N. Dodd 127352f1277eSChristian S.J. Peron void 127452f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 127552f1277eSChristian S.J. Peron { 127652f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 127752f1277eSChristian S.J. Peron struct mbuf mv, mb; 127852f1277eSChristian S.J. Peron 127952f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 128052f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 128152f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 128252f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 128352f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 128452f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 128552f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 128652f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 128752f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 128852f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 128952f1277eSChristian S.J. Peron /* 129052f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 129152f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 129252f1277eSChristian S.J. Peron * 129352f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 129452f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 129552f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 129652f1277eSChristian S.J. Peron * 129752f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 129852f1277eSChristian S.J. Peron */ 129952f1277eSChristian S.J. Peron if (data != NULL) { 130052f1277eSChristian S.J. Peron mv.m_next = m; 130152f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 130252f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 130352f1277eSChristian S.J. Peron mb.m_next = &mv; 130452f1277eSChristian S.J. Peron mb.m_data = data; 130552f1277eSChristian S.J. Peron mb.m_len = dlen; 130652f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 130752f1277eSChristian S.J. Peron } else 130852f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 130952f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 131052f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 131152f1277eSChristian S.J. Peron } 131252f1277eSChristian S.J. Peron 131360e87ca8SAndrew Thompson struct mbuf * 1314a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 131560e87ca8SAndrew Thompson { 131660e87ca8SAndrew Thompson struct ether_vlan_header *evl; 131760e87ca8SAndrew Thompson 131860e87ca8SAndrew Thompson M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_DONTWAIT); 131960e87ca8SAndrew Thompson if (m == NULL) 132060e87ca8SAndrew Thompson return (NULL); 132160e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 132260e87ca8SAndrew Thompson 132360e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 132460e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 132560e87ca8SAndrew Thompson if (m == NULL) 132660e87ca8SAndrew Thompson return (NULL); 132760e87ca8SAndrew Thompson } 132860e87ca8SAndrew Thompson 132960e87ca8SAndrew Thompson /* 133060e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 133160e87ca8SAndrew Thompson * with 802.1Q encapsulation. 133260e87ca8SAndrew Thompson */ 133360e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 133460e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 133560e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 133660e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 133760e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 133860e87ca8SAndrew Thompson return (m); 133960e87ca8SAndrew Thompson } 134060e87ca8SAndrew Thompson 1341fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 134240811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1343