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 *); 1179d4fe4b2SBrooks Davis 118fd6238a6SAndrew Thompson /* if_bridge(4) support */ 1198f867517SAndrew Thompson struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *); 1208f867517SAndrew Thompson int (*bridge_output_p)(struct ifnet *, struct mbuf *, 1218f867517SAndrew Thompson struct sockaddr *, struct rtentry *); 122c8b01292SAndrew Thompson void (*bridge_dn_p)(struct mbuf *, struct ifnet *); 1238f867517SAndrew Thompson 12418242d3bSAndrew Thompson /* if_lagg(4) support */ 12518242d3bSAndrew Thompson struct mbuf *(*lagg_input_p)(struct ifnet *, struct mbuf *); 126b47888ceSAndrew Thompson 127e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 128868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 129868d8b62SMatthew N. Dodd 130929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 131929ddbbbSAlfred Perlstein struct sockaddr *); 132d3c351c5SMarko Zec #ifdef VIMAGE 133d3c351c5SMarko Zec static void ether_reassign(struct ifnet *, struct vnet *, char *); 134d3c351c5SMarko Zec #endif 135868d8b62SMatthew N. Dodd 136fc74a9f9SBrooks Davis /* XXX: should be in an arp support file, not here */ 137fc74a9f9SBrooks Davis MALLOC_DEFINE(M_ARPCOM, "arpcom", "802.* interface internals"); 138fc74a9f9SBrooks Davis 13969462a82SBruce M Simpson #define ETHER_IS_BROADCAST(addr) \ 14069462a82SBruce M Simpson (bcmp(etherbroadcastaddr, (addr), ETHER_ADDR_LEN) == 0) 14169462a82SBruce M Simpson 1424c8e8c05SJulian Elischer #define senderr(e) do { error = (e); goto bad;} while (0) 143df8bae1dSRodney W. Grimes 144d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 1454b984093SLuigi Rizzo int 146dda10d62SOleg Bulyzhin ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, int shared); 1473e288e62SDimitry Andric static VNET_DEFINE(int, ether_ipfw); 1481e77c105SRobert Watson #define V_ether_ipfw VNET(ether_ipfw) 14944e33a07SMarko Zec #endif 1504b984093SLuigi Rizzo 1516e6b3f7cSQing Li 152df8bae1dSRodney W. Grimes /* 153df8bae1dSRodney W. Grimes * Ethernet output routine. 154df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 155df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 156df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 157df8bae1dSRodney W. Grimes */ 158df8bae1dSRodney W. Grimes int 15972fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 160279aa3d4SKip Macy struct sockaddr *dst, struct route *ro) 161df8bae1dSRodney W. Grimes { 162df8bae1dSRodney W. Grimes short type; 163279aa3d4SKip Macy int error = 0, hdrcmplt = 0; 16464760eb0SWarner Losh u_char esrc[ETHER_ADDR_LEN], edst[ETHER_ADDR_LEN]; 1656e6b3f7cSQing Li struct llentry *lle = NULL; 166279aa3d4SKip Macy struct rtentry *rt0 = NULL; 167098a8c3bSMatthew N. Dodd struct ether_header *eh; 16860ee3847SMax Laier struct pf_mtag *t; 169c54c76ccSOleg Bulyzhin int loop_copy = 1; 170d32864c3SRobert Watson int hlen; /* link layer header length */ 171df8bae1dSRodney W. Grimes 172279aa3d4SKip Macy if (ro != NULL) { 1739fca4f79SQing Li if (!(m->m_flags & (M_BCAST | M_MCAST))) 174279aa3d4SKip Macy lle = ro->ro_lle; 175279aa3d4SKip Macy rt0 = ro->ro_rt; 176279aa3d4SKip Macy } 17743b29369SRobert Watson #ifdef MAC 17830d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 17943b29369SRobert Watson if (error) 18043b29369SRobert Watson senderr(error); 18143b29369SRobert Watson #endif 18243b29369SRobert Watson 1836eeac1d9SJulian Elischer M_PROFILE(m); 184afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 185afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 18613f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 18713f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 188df8bae1dSRodney W. Grimes senderr(ENETDOWN); 1897f760c48SMatthew N. Dodd 19084dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 191df8bae1dSRodney W. Grimes switch (dst->sa_family) { 192df8bae1dSRodney W. Grimes #ifdef INET 193df8bae1dSRodney W. Grimes case AF_INET: 194279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 195279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 196279aa3d4SKip Macy else 1976e6b3f7cSQing Li error = arpresolve(ifp, rt0, m, dst, edst, &lle); 198cd46a114SLuigi Rizzo if (error) 199cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 20034bed8b0SDavid Greenman type = htons(ETHERTYPE_IP); 201df8bae1dSRodney W. Grimes break; 20243a6c75aSMatthew N. Dodd case AF_ARP: 20343a6c75aSMatthew N. Dodd { 20443a6c75aSMatthew N. Dodd struct arphdr *ah; 20543a6c75aSMatthew N. Dodd ah = mtod(m, struct arphdr *); 20643a6c75aSMatthew N. Dodd ah->ar_hrd = htons(ARPHRD_ETHER); 20743a6c75aSMatthew N. Dodd 208c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 20943a6c75aSMatthew N. Dodd 21043a6c75aSMatthew N. Dodd switch(ntohs(ah->ar_op)) { 21143a6c75aSMatthew N. Dodd case ARPOP_REVREQUEST: 21243a6c75aSMatthew N. Dodd case ARPOP_REVREPLY: 21343a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_REVARP); 21443a6c75aSMatthew N. Dodd break; 21543a6c75aSMatthew N. Dodd case ARPOP_REQUEST: 21643a6c75aSMatthew N. Dodd case ARPOP_REPLY: 21743a6c75aSMatthew N. Dodd default: 21843a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_ARP); 21943a6c75aSMatthew N. Dodd break; 22043a6c75aSMatthew N. Dodd } 22143a6c75aSMatthew N. Dodd 22243a6c75aSMatthew N. Dodd if (m->m_flags & M_BCAST) 22343a6c75aSMatthew N. Dodd bcopy(ifp->if_broadcastaddr, edst, ETHER_ADDR_LEN); 22443a6c75aSMatthew N. Dodd else 22543a6c75aSMatthew N. Dodd bcopy(ar_tha(ah), edst, ETHER_ADDR_LEN); 22643a6c75aSMatthew N. Dodd 22743a6c75aSMatthew N. Dodd } 22843a6c75aSMatthew N. Dodd break; 229df8bae1dSRodney W. Grimes #endif 23082cd038dSYoshinobu Inoue #ifdef INET6 23182cd038dSYoshinobu Inoue case AF_INET6: 232279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 233279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 234279aa3d4SKip Macy else 2359928dafbSQing Li error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle); 236cd46a114SLuigi Rizzo if (error) 237cd46a114SLuigi Rizzo return error; 23882cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 23982cd038dSYoshinobu Inoue break; 24082cd038dSYoshinobu Inoue #endif 241cc6a66f2SJulian Elischer #ifdef IPX 242cc6a66f2SJulian Elischer case AF_IPX: 2434f93599fSBoris Popov if (ef_outputp) { 2442a7e8eceSBoris Popov error = ef_outputp(ifp, &m, dst, &type, &hlen); 2455accfb8cSBoris Popov if (error) 2465accfb8cSBoris Popov goto bad; 2474f93599fSBoris Popov } else 24834bed8b0SDavid Greenman type = htons(ETHERTYPE_IPX); 249cc6a66f2SJulian Elischer bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 250cc6a66f2SJulian Elischer (caddr_t)edst, sizeof (edst)); 251cc6a66f2SJulian Elischer break; 252cc6a66f2SJulian Elischer #endif 253655929bfSJulian Elischer #ifdef NETATALK 254655929bfSJulian Elischer case AF_APPLETALK: 2551d0eab59SJulian Elischer { 256ed7509acSJulian Elischer struct at_ifaddr *aa; 2571d0eab59SJulian Elischer 258cd46a114SLuigi Rizzo if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) 259cd46a114SLuigi Rizzo senderr(EHOSTUNREACH); /* XXX */ 2606c7ffe93SRobert Watson if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 2616c7ffe93SRobert Watson ifa_free(&aa->aa_ifa); 2621d0eab59SJulian Elischer return (0); 2636c7ffe93SRobert Watson } 264655929bfSJulian Elischer /* 265ed7509acSJulian Elischer * In the phase 2 case, need to prepend an mbuf for the llc header. 266655929bfSJulian Elischer */ 267655929bfSJulian Elischer if ( aa->aa_flags & AFA_PHASE2 ) { 268655929bfSJulian Elischer struct llc llc; 269655929bfSJulian Elischer 2706c7ffe93SRobert Watson ifa_free(&aa->aa_ifa); 2717e2041e0SRobert Watson M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); 2722166ffe8SRobert Watson if (m == NULL) 2732166ffe8SRobert Watson senderr(ENOBUFS); 274655929bfSJulian Elischer llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 275655929bfSJulian Elischer llc.llc_control = LLC_UI; 276655929bfSJulian Elischer bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 277655929bfSJulian Elischer llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 278797f247bSMatthew N. Dodd bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 27934bed8b0SDavid Greenman type = htons(m->m_pkthdr.len); 280797f247bSMatthew N. Dodd hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN; 281655929bfSJulian Elischer } else { 2826c7ffe93SRobert Watson ifa_free(&aa->aa_ifa); 28334bed8b0SDavid Greenman type = htons(ETHERTYPE_AT); 284655929bfSJulian Elischer } 285655929bfSJulian Elischer break; 286ed7509acSJulian Elischer } 2878cdfefbdSPeter Wemm #endif /* NETATALK */ 288df8bae1dSRodney W. Grimes 289114ae644SMike Smith case pseudo_AF_HDRCMPLT: 290114ae644SMike Smith hdrcmplt = 1; 291114ae644SMike Smith eh = (struct ether_header *)dst->sa_data; 292114ae644SMike Smith (void)memcpy(esrc, eh->ether_shost, sizeof (esrc)); 293114ae644SMike Smith /* FALLTHROUGH */ 294114ae644SMike Smith 295df8bae1dSRodney W. Grimes case AF_UNSPEC: 296c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 297df8bae1dSRodney W. Grimes eh = (struct ether_header *)dst->sa_data; 29894a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 299df8bae1dSRodney W. Grimes type = eh->ether_type; 300df8bae1dSRodney W. Grimes break; 301df8bae1dSRodney W. Grimes 302df8bae1dSRodney W. Grimes default: 30329e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 304df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 305df8bae1dSRodney W. Grimes } 306df8bae1dSRodney W. Grimes 3076e6b3f7cSQing Li if (lle != NULL && (lle->la_flags & LLE_IFADDR)) { 3086e6b3f7cSQing Li int csum_flags = 0; 3096e6b3f7cSQing Li if (m->m_pkthdr.csum_flags & CSUM_IP) 3106e6b3f7cSQing Li csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 3116e6b3f7cSQing Li if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 3126e6b3f7cSQing Li csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 3132f4afd21SRandall Stewart if (m->m_pkthdr.csum_flags & CSUM_SCTP) 3142f4afd21SRandall Stewart csum_flags |= CSUM_SCTP_VALID; 3156e6b3f7cSQing Li m->m_pkthdr.csum_flags |= csum_flags; 3166e6b3f7cSQing Li m->m_pkthdr.csum_data = 0xffff; 3176e6b3f7cSQing Li return (if_simloop(ifp, m, dst->sa_family, 0)); 3186e6b3f7cSQing Li } 3196e6b3f7cSQing Li 320df8bae1dSRodney W. Grimes /* 321df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 322df8bae1dSRodney W. Grimes * allocate another. 323df8bae1dSRodney W. Grimes */ 324797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 3252166ffe8SRobert Watson if (m == NULL) 326df8bae1dSRodney W. Grimes senderr(ENOBUFS); 327df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 32894a5d9b6SDavid Greenman (void)memcpy(&eh->ether_type, &type, 329df8bae1dSRodney W. Grimes sizeof(eh->ether_type)); 33094a5d9b6SDavid Greenman (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); 331114ae644SMike Smith if (hdrcmplt) 332114ae644SMike Smith (void)memcpy(eh->ether_shost, esrc, 333114ae644SMike Smith sizeof(eh->ether_shost)); 334114ae644SMike Smith else 3354a0d6638SRuslan Ermilov (void)memcpy(eh->ether_shost, IF_LLADDR(ifp), 336df8bae1dSRodney W. Grimes sizeof(eh->ether_shost)); 337ed7509acSJulian Elischer 338ed7509acSJulian Elischer /* 339ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 340ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 341ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 342ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 343ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 344ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 345ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 346ed7509acSJulian Elischer */ 347c54c76ccSOleg Bulyzhin if ((ifp->if_flags & IFF_SIMPLEX) && loop_copy && 34860ee3847SMax Laier ((t = pf_find_mtag(m)) == NULL || !t->routed)) { 3493cd67511SJesper Skriver int csum_flags = 0; 3503cd67511SJesper Skriver 3513cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_IP) 3523cd67511SJesper Skriver csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 3533cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 3543cd67511SJesper Skriver csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 3552f4afd21SRandall Stewart if (m->m_pkthdr.csum_flags & CSUM_SCTP) 3562f4afd21SRandall Stewart csum_flags |= CSUM_SCTP_VALID; 35706f684b0SMatthew N. Dodd 358c54c76ccSOleg Bulyzhin if (m->m_flags & M_BCAST) { 35906f684b0SMatthew N. Dodd struct mbuf *n; 360ed7509acSJulian Elischer 361294dd290SLuigi Rizzo /* 362294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 363294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 364294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 365294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 366294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 367294dd290SLuigi Rizzo * extra data copying vs. extra locking). 3689983b3c0SYaroslav Tykhiy * 3699983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 3709983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 3719983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 372294dd290SLuigi Rizzo */ 373294dd290SLuigi Rizzo if ((n = m_dup(m, M_DONTWAIT)) != NULL) { 3743cd67511SJesper Skriver n->m_pkthdr.csum_flags |= csum_flags; 3753cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3763cd67511SJesper Skriver n->m_pkthdr.csum_data = 0xffff; 37706a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 378c1404dc0SArchie Cobbs } else 379c1404dc0SArchie Cobbs ifp->if_iqdrops++; 38006f684b0SMatthew N. Dodd } else if (bcmp(eh->ether_dhost, eh->ether_shost, 38106f684b0SMatthew N. Dodd ETHER_ADDR_LEN) == 0) { 3823cd67511SJesper Skriver m->m_pkthdr.csum_flags |= csum_flags; 3833cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3843cd67511SJesper Skriver m->m_pkthdr.csum_data = 0xffff; 38506a429a3SArchie Cobbs (void) if_simloop(ifp, m, dst->sa_family, hlen); 386ed7509acSJulian Elischer return (0); /* XXX */ 387ed7509acSJulian Elischer } 388ed7509acSJulian Elischer } 3892e2de7f2SArchie Cobbs 3903f7d1396SAndrew Thompson /* 3913f7d1396SAndrew Thompson * Bridges require special output handling. 3923f7d1396SAndrew Thompson */ 3933f7d1396SAndrew Thompson if (ifp->if_bridge) { 3943f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 3953f7d1396SAndrew Thompson return (error); 3963f7d1396SAndrew Thompson } 3973f7d1396SAndrew Thompson 398259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 399a9771948SGleb Smirnoff if (ifp->if_carp && 40054bfbd51SWill Andrews (error = (*carp_output_p)(ifp, m, dst, NULL))) 401a9771948SGleb Smirnoff goto bad; 402a9771948SGleb Smirnoff #endif 403a9771948SGleb Smirnoff 404e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 405eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 406514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 407514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 408e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 409e1e1452dSArchie Cobbs bad: if (m != NULL) 410e1e1452dSArchie Cobbs m_freem(m); 411e1e1452dSArchie Cobbs return (error); 412e1e1452dSArchie Cobbs } 413e1e1452dSArchie Cobbs if (m == NULL) 414e1e1452dSArchie Cobbs return (0); 415e1e1452dSArchie Cobbs } 416e1e1452dSArchie Cobbs 417e1e1452dSArchie Cobbs /* Continue with link-layer output */ 418e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 419e1e1452dSArchie Cobbs } 420e1e1452dSArchie Cobbs 421e1e1452dSArchie Cobbs /* 422e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 423e1e1452dSArchie Cobbs * 424e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 425e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 426e1e1452dSArchie Cobbs */ 427e1e1452dSArchie Cobbs int 428c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 429e1e1452dSArchie Cobbs { 430d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 4312b25acc1SLuigi Rizzo 4320b4b0b0fSJulian Elischer if (V_ip_fw_chk_ptr && V_ether_ipfw != 0) { 433dda10d62SOleg Bulyzhin if (ether_ipfw_chk(&m, ifp, 0) == 0) { 4344b984093SLuigi Rizzo if (m) { 4354b984093SLuigi Rizzo m_freem(m); 436e7909401SDavid Malone return EACCES; /* pkt dropped */ 4374b984093SLuigi Rizzo } else 4384b984093SLuigi Rizzo return 0; /* consumed e.g. in a pipe */ 4394b984093SLuigi Rizzo } 4404b984093SLuigi Rizzo } 441d7647d96SDag-Erling Smørgrav #endif 4422b25acc1SLuigi Rizzo 443df8bae1dSRodney W. Grimes /* 444df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 445df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 446df8bae1dSRodney W. Grimes */ 447aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 448df8bae1dSRodney W. Grimes } 449df8bae1dSRodney W. Grimes 450d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 451df8bae1dSRodney W. Grimes /* 4524b984093SLuigi Rizzo * ipfw processing for ethernet packets (in and out). 4534b984093SLuigi Rizzo * The second parameter is NULL from ether_demux, and ifp from 454b6de9e91SMax Laier * ether_output_frame. 4554b984093SLuigi Rizzo */ 4564b984093SLuigi Rizzo int 457dda10d62SOleg Bulyzhin ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, int shared) 4584b984093SLuigi Rizzo { 459c1d93b05SSam Leffler struct ether_header *eh; 460c1d93b05SSam Leffler struct ether_header save_eh; 461c1d93b05SSam Leffler struct mbuf *m; 4624b984093SLuigi Rizzo int i; 4632b25acc1SLuigi Rizzo struct ip_fw_args args; 464830c6e2bSLuigi Rizzo struct m_tag *mtag; 4654b984093SLuigi Rizzo 4667173b6e5SLuigi Rizzo /* fetch start point from rule, if any */ 4677173b6e5SLuigi Rizzo mtag = m_tag_locate(*m0, MTAG_IPFW_RULE, 0, NULL); 468830c6e2bSLuigi Rizzo if (mtag == NULL) { 4697173b6e5SLuigi Rizzo args.rule.slot = 0; 470de240d10SLuigi Rizzo } else { 471cc4d3c30SLuigi Rizzo /* dummynet packet, already partially processed */ 472cc4d3c30SLuigi Rizzo struct ipfw_rule_ref *r; 473830c6e2bSLuigi Rizzo 4747173b6e5SLuigi Rizzo /* XXX can we free it after use ? */ 475830c6e2bSLuigi Rizzo mtag->m_tag_id = PACKET_TAG_NONE; 476cc4d3c30SLuigi Rizzo r = (struct ipfw_rule_ref *)(mtag + 1); 477cc4d3c30SLuigi Rizzo if (r->info & IPFW_ONEPASS) 478dda10d62SOleg Bulyzhin return (1); 479cc4d3c30SLuigi Rizzo args.rule = *r; 480de240d10SLuigi Rizzo } 4812f8ebbf4SLuigi Rizzo 4824b984093SLuigi Rizzo /* 4832f8ebbf4SLuigi Rizzo * I need some amt of data to be contiguous, and in case others need 4844b984093SLuigi Rizzo * the packet (shared==1) also better be in the first mbuf. 4854b984093SLuigi Rizzo */ 486c1d93b05SSam Leffler m = *m0; 487c1d93b05SSam Leffler i = min( m->m_pkthdr.len, max_protohdr); 488c1d93b05SSam Leffler if ( shared || m->m_len < i) { 489c1d93b05SSam Leffler m = m_pullup(m, i); 490c1d93b05SSam Leffler if (m == NULL) { 491c1d93b05SSam Leffler *m0 = m; 4924b984093SLuigi Rizzo return 0; 4934b984093SLuigi Rizzo } 494c1d93b05SSam Leffler } 495c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 496c1d93b05SSam Leffler save_eh = *eh; /* save copy for restore below */ 497c1d93b05SSam Leffler m_adj(m, ETHER_HDR_LEN); /* strip ethernet header */ 4984b984093SLuigi Rizzo 499c1d93b05SSam Leffler args.m = m; /* the packet we are looking at */ 5002b25acc1SLuigi Rizzo args.oif = dst; /* destination, if any */ 5012b25acc1SLuigi Rizzo args.next_hop = NULL; /* we do not support forward yet */ 5022b25acc1SLuigi Rizzo args.eh = &save_eh; /* MAC header for bridged/MAC packets */ 5033ecf1851SOleg Bulyzhin args.inp = NULL; /* used by ipfw uid/gid/jail rules */ 5040b4b0b0fSJulian Elischer i = V_ip_fw_chk_ptr(&args); 505c1d93b05SSam Leffler m = args.m; 506c1d93b05SSam Leffler if (m != NULL) { 507c1d93b05SSam Leffler /* 508c1d93b05SSam Leffler * Restore Ethernet header, as needed, in case the 509c1d93b05SSam Leffler * mbuf chain was replaced by ipfw. 510c1d93b05SSam Leffler */ 511a163d034SWarner Losh M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 512c1d93b05SSam Leffler if (m == NULL) { 513c1d93b05SSam Leffler *m0 = m; 514c1d93b05SSam Leffler return 0; 515c1d93b05SSam Leffler } 516c1d93b05SSam Leffler if (eh != mtod(m, struct ether_header *)) 517c1d93b05SSam Leffler bcopy(&save_eh, mtod(m, struct ether_header *), 518c1d93b05SSam Leffler ETHER_HDR_LEN); 519c1d93b05SSam Leffler } 520c1d93b05SSam Leffler *m0 = m; 5212b25acc1SLuigi Rizzo 5226c69a7c3SGleb Smirnoff if (i == IP_FW_DENY) /* drop */ 5234b984093SLuigi Rizzo return 0; 5244b984093SLuigi Rizzo 5256c69a7c3SGleb Smirnoff KASSERT(m != NULL, ("ether_ipfw_chk: m is NULL")); 5266c69a7c3SGleb Smirnoff 5276c69a7c3SGleb Smirnoff if (i == IP_FW_PASS) /* a PASS rule. */ 5284b984093SLuigi Rizzo return 1; 5294b984093SLuigi Rizzo 530115a40c7SLuigi Rizzo if (ip_dn_io_ptr && (i == IP_FW_DUMMYNET)) { 531830c6e2bSLuigi Rizzo int dir; 5324b984093SLuigi Rizzo /* 5334b984093SLuigi Rizzo * Pass the pkt to dummynet, which consumes it. 5344b984093SLuigi Rizzo * If shared, make a copy and keep the original. 5354b984093SLuigi Rizzo */ 5364b984093SLuigi Rizzo if (shared) { 537a163d034SWarner Losh m = m_copypacket(m, M_DONTWAIT); 5382b25acc1SLuigi Rizzo if (m == NULL) 5394b984093SLuigi Rizzo return 0; 5404b984093SLuigi Rizzo } else { 5412b25acc1SLuigi Rizzo /* 542c1d93b05SSam Leffler * Pass the original to dummynet and 543c1d93b05SSam Leffler * nothing back to the caller 5442b25acc1SLuigi Rizzo */ 545c1d93b05SSam Leffler *m0 = NULL ; 5464b984093SLuigi Rizzo } 547830c6e2bSLuigi Rizzo dir = PROTO_LAYER2 | (dst ? DIR_OUT : DIR_IN); 548830c6e2bSLuigi Rizzo ip_dn_io_ptr(&m, dir, &args); 5494b984093SLuigi Rizzo return 0; 5504b984093SLuigi Rizzo } 5514b984093SLuigi Rizzo /* 5522f8ebbf4SLuigi Rizzo * XXX at some point add support for divert/forward actions. 5532f8ebbf4SLuigi Rizzo * If none of the above matches, we have to drop the pkt. 5544b984093SLuigi Rizzo */ 5554b984093SLuigi Rizzo return 0; 5564b984093SLuigi Rizzo } 557d7647d96SDag-Erling Smørgrav #endif 5584b984093SLuigi Rizzo 5594b984093SLuigi Rizzo /* 560c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 561c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 562df8bae1dSRodney W. Grimes */ 563c1d93b05SSam Leffler static void 5646cb52192SRobert Watson ether_input_internal(struct ifnet *ifp, struct mbuf *m) 565df8bae1dSRodney W. Grimes { 566c1d93b05SSam Leffler struct ether_header *eh; 567c1d93b05SSam Leffler u_short etype; 568df8bae1dSRodney W. Grimes 56969462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 57069462a82SBruce M Simpson m_freem(m); 57169462a82SBruce M Simpson return; 57269462a82SBruce M Simpson } 57369462a82SBruce M Simpson #ifdef DIAGNOSTIC 57469462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 57569462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 57669462a82SBruce M Simpson m_freem(m); 57769462a82SBruce M Simpson return; 57869462a82SBruce M Simpson } 57969462a82SBruce M Simpson #endif 580c1d93b05SSam Leffler /* 581c1d93b05SSam Leffler * Do consistency checks to verify assumptions 582c1d93b05SSam Leffler * made by code past this point. 583c1d93b05SSam Leffler */ 584c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 585c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 586c1d93b05SSam Leffler ifp->if_ierrors++; 587c939f1aeSLuigi Rizzo m_freem(m); 588c939f1aeSLuigi Rizzo return; 589c939f1aeSLuigi Rizzo } 590797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 591c1d93b05SSam Leffler /* XXX maybe should pullup? */ 592c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 593c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 594c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 595c1d93b05SSam Leffler ifp->if_ierrors++; 596c1d93b05SSam Leffler m_freem(m); 597c1d93b05SSam Leffler return; 5982e2de7f2SArchie Cobbs } 599c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 600c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 601c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 602c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 603c1d93b05SSam Leffler ifp->if_ierrors++; 604c1d93b05SSam Leffler m_freem(m); 605c1d93b05SSam Leffler return; 606c1d93b05SSam Leffler } 607c1d93b05SSam Leffler #ifdef DIAGNOSTIC 608c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 6099bf40edeSBrooks Davis if_printf(ifp, "Warning, frame marked as received on %s\n", 6109bf40edeSBrooks Davis m->m_pkthdr.rcvif->if_xname); 611c1d93b05SSam Leffler } 612c1d93b05SSam Leffler #endif 613c1d93b05SSam Leffler 61421ca7b57SMarko Zec CURVNET_SET_QUIET(ifp->if_vnet); 61521ca7b57SMarko Zec 61669462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 61769462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 61869462a82SBruce M Simpson m->m_flags |= M_BCAST; 61969462a82SBruce M Simpson else 62069462a82SBruce M Simpson m->m_flags |= M_MCAST; 62169462a82SBruce M Simpson ifp->if_imcasts++; 62269462a82SBruce M Simpson } 62369462a82SBruce M Simpson 624533d8562SRobert Watson #ifdef MAC 625533d8562SRobert Watson /* 626533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 627533d8562SRobert Watson * consumers can get to it. 628533d8562SRobert Watson */ 62930d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 630533d8562SRobert Watson #endif 631533d8562SRobert Watson 632c1d93b05SSam Leffler /* 63369462a82SBruce M Simpson * Give bpf a chance at the packet. 634c1d93b05SSam Leffler */ 635d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 6362e2de7f2SArchie Cobbs 63769462a82SBruce M Simpson /* 63869462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 63969462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 64069462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 64169462a82SBruce M Simpson */ 642c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 643c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 644c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 645c1d93b05SSam Leffler } 646c1d93b05SSam Leffler 647c1d93b05SSam Leffler ifp->if_ibytes += m->m_pkthdr.len; 64805463bb5SDavid Greenman 64969462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 650de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 651de572b37SChristian S.J. Peron m_freem(m); 65221ca7b57SMarko Zec CURVNET_RESTORE(); 653de572b37SChristian S.J. Peron return; 654de572b37SChristian S.J. Peron } 655de572b37SChristian S.J. Peron 65618242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 657b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 65818242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 65918242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 66018242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 661b47888ceSAndrew Thompson if (m != NULL) 662b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 663b47888ceSAndrew Thompson else 664b47888ceSAndrew Thompson return; 665b47888ceSAndrew Thompson } 666b47888ceSAndrew Thompson 66769462a82SBruce M Simpson /* 66869462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 66969462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 67069462a82SBruce M Simpson * path correctly. 67169462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 67269462a82SBruce M Simpson */ 67369462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 67469462a82SBruce M Simpson struct ether_vlan_header *evl; 67569462a82SBruce M Simpson 67669462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 67769462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 678402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 67969462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 680402d5e27SBruce M Simpson #endif 68169462a82SBruce M Simpson ifp->if_ierrors++; 68269462a82SBruce M Simpson m_freem(m); 68369462a82SBruce M Simpson return; 68469462a82SBruce M Simpson } 68569462a82SBruce M Simpson 68669462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 68769462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 68869462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 68969462a82SBruce M Simpson 69069462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 69169462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 69269462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 69369462a82SBruce M Simpson } 69469462a82SBruce M Simpson 69569462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 696eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 697514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 69869462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 69969462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 700c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 70121ca7b57SMarko Zec if (m == NULL) { 70221ca7b57SMarko Zec CURVNET_RESTORE(); 703e1e1452dSArchie Cobbs return; 704e1e1452dSArchie Cobbs } 70521ca7b57SMarko Zec } 706e1e1452dSArchie Cobbs 7078f867517SAndrew Thompson /* 70869462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 70969462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 71069462a82SBruce M Simpson * and the frame should be delivered locally. 7118f867517SAndrew Thompson */ 71269462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 71369462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 714fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 71521ca7b57SMarko Zec if (m == NULL) { 71621ca7b57SMarko Zec CURVNET_RESTORE(); 7178f867517SAndrew Thompson return; 7188f867517SAndrew Thompson } 71921ca7b57SMarko Zec } 7208f867517SAndrew Thompson 721259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 72269462a82SBruce M Simpson /* 72369462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 72469462a82SBruce M Simpson * mbuf flows up to Layer 3. 72569462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 72669462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 72769462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 72869462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 72969462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 73069462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 73169462a82SBruce M Simpson */ 73254bfbd51SWill Andrews if (ifp->if_carp && (*carp_forus_p)(ifp, eh->ether_dhost)) { 73369462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 73469462a82SBruce M Simpson } else 73569462a82SBruce M Simpson #endif 73669462a82SBruce M Simpson { 73769462a82SBruce M Simpson /* 738e7f8c833SBruce M Simpson * If the frame received was not for our MAC address, set the 73969462a82SBruce M Simpson * M_PROMISC flag on the mbuf chain. The frame may need to 74069462a82SBruce M Simpson * be seen by the rest of the Ethernet input path in case of 74169462a82SBruce M Simpson * re-entry (e.g. bridge, vlan, netgraph) but should not be 74269462a82SBruce M Simpson * seen by upper protocol layers. 74369462a82SBruce M Simpson */ 74469462a82SBruce M Simpson if (!ETHER_IS_MULTICAST(eh->ether_dhost) && 745e7f8c833SBruce M Simpson bcmp(IF_LLADDR(ifp), eh->ether_dhost, ETHER_ADDR_LEN) != 0) 74669462a82SBruce M Simpson m->m_flags |= M_PROMISC; 74769462a82SBruce M Simpson } 74869462a82SBruce M Simpson 749a6ddbff0SPoul-Henning Kamp /* First chunk of an mbuf contains good entropy */ 75010b1fde0SMark Murray if (harvest.ethernet) 75110b1fde0SMark Murray random_harvest(m, 16, 3, 0, RANDOM_NET); 75269462a82SBruce M Simpson 753acf032f5SRobert Watson ether_demux(ifp, m); 75421ca7b57SMarko Zec CURVNET_RESTORE(); 755e1e1452dSArchie Cobbs } 756e1e1452dSArchie Cobbs 757e1e1452dSArchie Cobbs /* 7586cb52192SRobert Watson * Ethernet input dispatch; by default, direct dispatch here regardless of 7596cb52192SRobert Watson * global configuration. 7606cb52192SRobert Watson */ 7616cb52192SRobert Watson static void 7626cb52192SRobert Watson ether_nh_input(struct mbuf *m) 7636cb52192SRobert Watson { 7646cb52192SRobert Watson 7656cb52192SRobert Watson ether_input_internal(m->m_pkthdr.rcvif, m); 7666cb52192SRobert Watson } 7676cb52192SRobert Watson 7686cb52192SRobert Watson static struct netisr_handler ether_nh = { 7696cb52192SRobert Watson .nh_name = "ether", 7706cb52192SRobert Watson .nh_handler = ether_nh_input, 7716cb52192SRobert Watson .nh_proto = NETISR_ETHER, 7726cb52192SRobert Watson .nh_policy = NETISR_POLICY_SOURCE, 7736cb52192SRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 7746cb52192SRobert Watson }; 7756cb52192SRobert Watson 7766cb52192SRobert Watson static void 7776cb52192SRobert Watson ether_init(__unused void *arg) 7786cb52192SRobert Watson { 7796cb52192SRobert Watson 7806cb52192SRobert Watson netisr_register(ðer_nh); 7816cb52192SRobert Watson } 7826cb52192SRobert Watson SYSINIT(ether, SI_SUB_INIT_IF, SI_ORDER_ANY, ether_init, NULL); 7836cb52192SRobert Watson 7846cb52192SRobert Watson static void 7856cb52192SRobert Watson ether_input(struct ifnet *ifp, struct mbuf *m) 7866cb52192SRobert Watson { 7876cb52192SRobert Watson 7886cb52192SRobert Watson /* 7896cb52192SRobert Watson * We will rely on rcvif being set properly in the deferred context, 7906cb52192SRobert Watson * so assert it is correct here. 7916cb52192SRobert Watson */ 7926cb52192SRobert Watson KASSERT(m->m_pkthdr.rcvif == ifp, ("%s: ifnet mismatch", __func__)); 7936cb52192SRobert Watson 7946cb52192SRobert Watson netisr_dispatch(NETISR_ETHER, m); 7956cb52192SRobert Watson } 7966cb52192SRobert Watson 7976cb52192SRobert Watson /* 798e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 799e1e1452dSArchie Cobbs */ 800e1e1452dSArchie Cobbs void 801c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 802e1e1452dSArchie Cobbs { 803c1d93b05SSam Leffler struct ether_header *eh; 8041cafed39SJonathan Lemon int isr; 805e1e1452dSArchie Cobbs u_short ether_type; 806e1e1452dSArchie Cobbs #if defined(NETATALK) 807098a8c3bSMatthew N. Dodd struct llc *l; 808e1e1452dSArchie Cobbs #endif 80969462a82SBruce M Simpson 81069462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 81169462a82SBruce M Simpson 812d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 81369462a82SBruce M Simpson /* 81469462a82SBruce M Simpson * Allow dummynet and/or ipfw to claim the frame. 81569462a82SBruce M Simpson * Do not do this for PROMISC frames in case we are re-entered. 81669462a82SBruce M Simpson */ 8170b4b0b0fSJulian Elischer if (V_ip_fw_chk_ptr && V_ether_ipfw != 0 && !(m->m_flags & M_PROMISC)) { 818dda10d62SOleg Bulyzhin if (ether_ipfw_chk(&m, NULL, 0) == 0) { 81969462a82SBruce M Simpson if (m) 82069462a82SBruce M Simpson m_freem(m); /* dropped; free mbuf chain */ 82169462a82SBruce M Simpson return; /* consumed */ 82269462a82SBruce M Simpson } 82369462a82SBruce M Simpson } 824d7647d96SDag-Erling Smørgrav #endif 825c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 826cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 827c1d93b05SSam Leffler 828a9771948SGleb Smirnoff /* 82969462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 83069462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 831a9771948SGleb Smirnoff */ 83269462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 83369462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 83475ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 8356c23e6ccSRuslan Ermilov ifp->if_noproto++; 8366c23e6ccSRuslan Ermilov m_freem(m); 8376c23e6ccSRuslan Ermilov return; 8386c23e6ccSRuslan Ermilov } 83969462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 84069462a82SBruce M Simpson __func__)); 84169462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 84269462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 843c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 844c1d93b05SSam Leffler return; 845c1d93b05SSam Leffler } 846c1d93b05SSam Leffler 847c1d93b05SSam Leffler /* 84869462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 84969462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 850c1d93b05SSam Leffler */ 85169462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 852c1d93b05SSam Leffler m_freem(m); 853c1d93b05SSam Leffler return; 854c1d93b05SSam Leffler } 855c1d93b05SSam Leffler 85669462a82SBruce M Simpson /* 85769462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 85869462a82SBruce M Simpson * Strip off Ethernet header. 85969462a82SBruce M Simpson */ 86069462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 86169462a82SBruce M Simpson m->m_flags &= ~(M_PROTOFLAGS); 862797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 863c1d93b05SSam Leffler 86469462a82SBruce M Simpson /* 86569462a82SBruce M Simpson * Dispatch frame to upper layer. 86669462a82SBruce M Simpson */ 867307d80beSDavid Greenman switch (ether_type) { 868df8bae1dSRodney W. Grimes #ifdef INET 869df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 8705d691e6dSAndre Oppermann if ((m = ip_fastforward(m)) == NULL) 8711f91d8c5SDavid Greenman return; 8721cafed39SJonathan Lemon isr = NETISR_IP; 873df8bae1dSRodney W. Grimes break; 874df8bae1dSRodney W. Grimes 875df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 87608aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 87708aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 87808aadfbbSJonathan Lemon m_freem(m); 87908aadfbbSJonathan Lemon return; 88008aadfbbSJonathan Lemon } 8811cafed39SJonathan Lemon isr = NETISR_ARP; 882df8bae1dSRodney W. Grimes break; 883df8bae1dSRodney W. Grimes #endif 884cc6a66f2SJulian Elischer #ifdef IPX 885cc6a66f2SJulian Elischer case ETHERTYPE_IPX: 8864f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 8874f93599fSBoris Popov return; 8881cafed39SJonathan Lemon isr = NETISR_IPX; 889cc6a66f2SJulian Elischer break; 890cc6a66f2SJulian Elischer #endif 89182cd038dSYoshinobu Inoue #ifdef INET6 89282cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 8931cafed39SJonathan Lemon isr = NETISR_IPV6; 89482cd038dSYoshinobu Inoue break; 89582cd038dSYoshinobu Inoue #endif 896655929bfSJulian Elischer #ifdef NETATALK 897655929bfSJulian Elischer case ETHERTYPE_AT: 8981cafed39SJonathan Lemon isr = NETISR_ATALK1; 899655929bfSJulian Elischer break; 900655929bfSJulian Elischer case ETHERTYPE_AARP: 9011cafed39SJonathan Lemon isr = NETISR_AARP; 9021cafed39SJonathan Lemon break; 9038cdfefbdSPeter Wemm #endif /* NETATALK */ 904df8bae1dSRodney W. Grimes default: 9054f93599fSBoris Popov #ifdef IPX 9064f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 9074f93599fSBoris Popov return; 9084f93599fSBoris Popov #endif /* IPX */ 909242c5536SPeter Wemm #if defined(NETATALK) 910307d80beSDavid Greenman if (ether_type > ETHERMTU) 911c1d93b05SSam Leffler goto discard; 912df8bae1dSRodney W. Grimes l = mtod(m, struct llc *); 9131cafed39SJonathan Lemon if (l->llc_dsap == LLC_SNAP_LSAP && 9141cafed39SJonathan Lemon l->llc_ssap == LLC_SNAP_LSAP && 9151cafed39SJonathan Lemon l->llc_control == LLC_UI) { 9164158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], at_org_code, 917655929bfSJulian Elischer sizeof(at_org_code)) == 0 && 918655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 919797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 9201cafed39SJonathan Lemon isr = NETISR_ATALK2; 921655929bfSJulian Elischer break; 922655929bfSJulian Elischer } 9234158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 924655929bfSJulian Elischer sizeof(aarp_org_code)) == 0 && 925655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 926797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 9271cafed39SJonathan Lemon isr = NETISR_AARP; 928655929bfSJulian Elischer break; 929df8bae1dSRodney W. Grimes } 9301cafed39SJonathan Lemon } 931242c5536SPeter Wemm #endif /* NETATALK */ 9321cafed39SJonathan Lemon goto discard; 933df8bae1dSRodney W. Grimes } 9341cafed39SJonathan Lemon netisr_dispatch(isr, m); 935c1d93b05SSam Leffler return; 9361cafed39SJonathan Lemon 937c1d93b05SSam Leffler discard: 938c1d93b05SSam Leffler /* 939c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 940c1d93b05SSam Leffler * hand the packet to it for last chance processing; 941c1d93b05SSam Leffler * otherwise dispose of it. 942c1d93b05SSam Leffler */ 943eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 944514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 945514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 946c1d93b05SSam Leffler /* 947c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 948c1d93b05SSam Leffler * consistent view of inbound packets. 949c1d93b05SSam Leffler */ 950797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 951c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 952c1d93b05SSam Leffler return; 953c1d93b05SSam Leffler } 954c1d93b05SSam Leffler m_freem(m); 955c1d93b05SSam Leffler } 956c1d93b05SSam Leffler 957c1d93b05SSam Leffler /* 958c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 959c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 960c1d93b05SSam Leffler * 961c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 962c1d93b05SSam Leffler * 963c1d93b05SSam Leffler * since there's no static buffer involved. 964c1d93b05SSam Leffler */ 965c1d93b05SSam Leffler char * 966c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 967c1d93b05SSam Leffler { 968c1d93b05SSam Leffler static char etherbuf[18]; 969c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 970c1d93b05SSam Leffler return (etherbuf); 971df8bae1dSRodney W. Grimes } 972df8bae1dSRodney W. Grimes 973df8bae1dSRodney W. Grimes /* 974df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 975df8bae1dSRodney W. Grimes */ 976df8bae1dSRodney W. Grimes void 977d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 978df8bae1dSRodney W. Grimes { 979f93dfa28SBrooks Davis int i; 980098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 981098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 982df8bae1dSRodney W. Grimes 983c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 984c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 985cfeff1b6SJonathan Lemon if_attach(ifp); 986df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 987c1d93b05SSam Leffler ifp->if_output = ether_output; 988c1d93b05SSam Leffler ifp->if_input = ether_input; 9891158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 990d3c351c5SMarko Zec #ifdef VIMAGE 991d3c351c5SMarko Zec ifp->if_reassign = ether_reassign; 992d3c351c5SMarko Zec #endif 993a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 994c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 995322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 996c1d93b05SSam Leffler 9974a0d6638SRuslan Ermilov ifa = ifp->if_addr; 9986e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 99959562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 1000df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 1001df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 1002d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 1003c1d93b05SSam Leffler 1004797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 1005e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 1006e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 1007e3bbbec2SMatthew N. Dodd 1008f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 1009f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 1010d09ed26fSRuslan Ermilov if (lla[i] != 0) 1011f93dfa28SBrooks Davis break; 1012f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 1013d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 1014e1e1452dSArchie Cobbs } 1015e1e1452dSArchie Cobbs 101621b8ebd9SArchie Cobbs /* 101721b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 101821b8ebd9SArchie Cobbs */ 101921b8ebd9SArchie Cobbs void 1020c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 102121b8ebd9SArchie Cobbs { 1022514bcb89SPoul-Henning Kamp if (IFP2AC(ifp)->ac_netgraph != NULL) { 1023514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 1024514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 102521b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 1026514bcb89SPoul-Henning Kamp } 102720a65f37SAndrew Thompson 102821b8ebd9SArchie Cobbs bpfdetach(ifp); 102921b8ebd9SArchie Cobbs if_detach(ifp); 103021b8ebd9SArchie Cobbs } 103121b8ebd9SArchie Cobbs 1032d3c351c5SMarko Zec #ifdef VIMAGE 1033d3c351c5SMarko Zec void 1034d3c351c5SMarko Zec ether_reassign(struct ifnet *ifp, struct vnet *new_vnet, char *unused __unused) 1035d3c351c5SMarko Zec { 1036d3c351c5SMarko Zec 1037d3c351c5SMarko Zec if (IFP2AC(ifp)->ac_netgraph != NULL) { 1038d3c351c5SMarko Zec KASSERT(ng_ether_detach_p != NULL, 1039d3c351c5SMarko Zec ("ng_ether_detach_p is NULL")); 1040d3c351c5SMarko Zec (*ng_ether_detach_p)(ifp); 1041d3c351c5SMarko Zec } 1042d3c351c5SMarko Zec 1043d3c351c5SMarko Zec if (ng_ether_attach_p != NULL) { 1044d3c351c5SMarko Zec CURVNET_SET_QUIET(new_vnet); 1045d3c351c5SMarko Zec (*ng_ether_attach_p)(ifp); 1046d3c351c5SMarko Zec CURVNET_RESTORE(); 1047d3c351c5SMarko Zec } 1048d3c351c5SMarko Zec } 1049d3c351c5SMarko Zec #endif 1050d3c351c5SMarko Zec 1051ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 1052602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 1053d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 1054eddfbb76SRobert Watson SYSCTL_VNET_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW, 1055eddfbb76SRobert Watson &VNET_NAME(ether_ipfw), 0, "Pass ether pkts through firewall"); 1056d7647d96SDag-Erling Smørgrav #endif 105730106f6aSPoul-Henning Kamp 105816b4a343SChristian Weisgerber #if 0 105916b4a343SChristian Weisgerber /* 106016b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 106116b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 106216b4a343SChristian Weisgerber * than the double-loop. 106316b4a343SChristian Weisgerber */ 106416b4a343SChristian Weisgerber uint32_t 106516b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 106616b4a343SChristian Weisgerber { 106716b4a343SChristian Weisgerber size_t i; 106816b4a343SChristian Weisgerber uint32_t crc; 106916b4a343SChristian Weisgerber int bit; 107016b4a343SChristian Weisgerber uint8_t data; 107116b4a343SChristian Weisgerber 107216b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 107316b4a343SChristian Weisgerber 107416b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 1075933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 107616b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 107716b4a343SChristian Weisgerber crc >>= 1; 107816b4a343SChristian Weisgerber if (carry) 107916b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 108016b4a343SChristian Weisgerber } 1081933dad75SAntoine Brodin } 108216b4a343SChristian Weisgerber 108316b4a343SChristian Weisgerber return (crc); 108416b4a343SChristian Weisgerber } 108516b4a343SChristian Weisgerber #else 108616b4a343SChristian Weisgerber uint32_t 108716b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 108816b4a343SChristian Weisgerber { 108916b4a343SChristian Weisgerber static const uint32_t crctab[] = { 109016b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 109116b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 109216b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 109316b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 109416b4a343SChristian Weisgerber }; 109516b4a343SChristian Weisgerber size_t i; 109616b4a343SChristian Weisgerber uint32_t crc; 109716b4a343SChristian Weisgerber 109816b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 109916b4a343SChristian Weisgerber 110016b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 110116b4a343SChristian Weisgerber crc ^= buf[i]; 110216b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 110316b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 110416b4a343SChristian Weisgerber } 110516b4a343SChristian Weisgerber 110616b4a343SChristian Weisgerber return (crc); 110716b4a343SChristian Weisgerber } 110816b4a343SChristian Weisgerber #endif 110916b4a343SChristian Weisgerber 111016b4a343SChristian Weisgerber uint32_t 111116b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 111216b4a343SChristian Weisgerber { 111316b4a343SChristian Weisgerber size_t i; 111416b4a343SChristian Weisgerber uint32_t crc, carry; 111516b4a343SChristian Weisgerber int bit; 111616b4a343SChristian Weisgerber uint8_t data; 111716b4a343SChristian Weisgerber 111816b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 111916b4a343SChristian Weisgerber 112016b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 112116b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 112216b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 112316b4a343SChristian Weisgerber crc <<= 1; 112416b4a343SChristian Weisgerber if (carry) 112516b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 112616b4a343SChristian Weisgerber } 112716b4a343SChristian Weisgerber } 112816b4a343SChristian Weisgerber 112916b4a343SChristian Weisgerber return (crc); 113016b4a343SChristian Weisgerber } 113116b4a343SChristian Weisgerber 1132fb583156SDavid Greenman int 1133995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 113430106f6aSPoul-Henning Kamp { 113530106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 113630106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 1137fb583156SDavid Greenman int error = 0; 113830106f6aSPoul-Henning Kamp 113930106f6aSPoul-Henning Kamp switch (command) { 114030106f6aSPoul-Henning Kamp case SIOCSIFADDR: 114130106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 114230106f6aSPoul-Henning Kamp 114330106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 114430106f6aSPoul-Henning Kamp #ifdef INET 114530106f6aSPoul-Henning Kamp case AF_INET: 114630106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1147322dcb8dSMax Khon arp_ifinit(ifp, ifa); 114830106f6aSPoul-Henning Kamp break; 114930106f6aSPoul-Henning Kamp #endif 115030106f6aSPoul-Henning Kamp #ifdef IPX 115130106f6aSPoul-Henning Kamp /* 115230106f6aSPoul-Henning Kamp * XXX - This code is probably wrong 115330106f6aSPoul-Henning Kamp */ 115430106f6aSPoul-Henning Kamp case AF_IPX: 115530106f6aSPoul-Henning Kamp { 1156098a8c3bSMatthew N. Dodd struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 115730106f6aSPoul-Henning Kamp 115830106f6aSPoul-Henning Kamp if (ipx_nullhost(*ina)) 115930106f6aSPoul-Henning Kamp ina->x_host = 116086101139SPoul-Henning Kamp *(union ipx_host *) 11614a0d6638SRuslan Ermilov IF_LLADDR(ifp); 116230106f6aSPoul-Henning Kamp else { 116330106f6aSPoul-Henning Kamp bcopy((caddr_t) ina->x_host.c_host, 11644a0d6638SRuslan Ermilov (caddr_t) IF_LLADDR(ifp), 1165fc74a9f9SBrooks Davis ETHER_ADDR_LEN); 116630106f6aSPoul-Henning Kamp } 116730106f6aSPoul-Henning Kamp 116830106f6aSPoul-Henning Kamp /* 116930106f6aSPoul-Henning Kamp * Set new address 117030106f6aSPoul-Henning Kamp */ 117130106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 117230106f6aSPoul-Henning Kamp break; 117330106f6aSPoul-Henning Kamp } 117430106f6aSPoul-Henning Kamp #endif 117530106f6aSPoul-Henning Kamp default: 117630106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 117730106f6aSPoul-Henning Kamp break; 117830106f6aSPoul-Henning Kamp } 117930106f6aSPoul-Henning Kamp break; 118030106f6aSPoul-Henning Kamp 118130106f6aSPoul-Henning Kamp case SIOCGIFADDR: 118230106f6aSPoul-Henning Kamp { 118330106f6aSPoul-Henning Kamp struct sockaddr *sa; 118430106f6aSPoul-Henning Kamp 118530106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 11864a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 118730106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 118830106f6aSPoul-Henning Kamp } 118930106f6aSPoul-Henning Kamp break; 1190fb583156SDavid Greenman 1191fb583156SDavid Greenman case SIOCSIFMTU: 1192fb583156SDavid Greenman /* 1193fb583156SDavid Greenman * Set the interface MTU. 1194fb583156SDavid Greenman */ 1195fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1196fb583156SDavid Greenman error = EINVAL; 1197fb583156SDavid Greenman } else { 1198fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 119930106f6aSPoul-Henning Kamp } 1200fb583156SDavid Greenman break; 1201c1d93b05SSam Leffler default: 1202c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1203c1d93b05SSam Leffler break; 1204fb583156SDavid Greenman } 1205fb583156SDavid Greenman return (error); 120630106f6aSPoul-Henning Kamp } 12071158dfb7SGarrett Wollman 120837c84183SPoul-Henning Kamp static int 120972fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 121072fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 12111158dfb7SGarrett Wollman { 12121158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1213d7647d96SDag-Erling Smørgrav #ifdef INET 12141158dfb7SGarrett Wollman struct sockaddr_in *sin; 1215d7647d96SDag-Erling Smørgrav #endif 121682cd038dSYoshinobu Inoue #ifdef INET6 121782cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 121882cd038dSYoshinobu Inoue #endif 12191158dfb7SGarrett Wollman u_char *e_addr; 12201158dfb7SGarrett Wollman 12211158dfb7SGarrett Wollman switch(sa->sa_family) { 12221158dfb7SGarrett Wollman case AF_LINK: 12237f33a738SJulian Elischer /* 12247f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 12257f33a738SJulian Elischer */ 12261158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 12271158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1228086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 12291158dfb7SGarrett Wollman return EADDRNOTAVAIL; 12301158dfb7SGarrett Wollman *llsa = 0; 12311158dfb7SGarrett Wollman return 0; 12321158dfb7SGarrett Wollman 12331158dfb7SGarrett Wollman #ifdef INET 12341158dfb7SGarrett Wollman case AF_INET: 12351158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 12361158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 12371158dfb7SGarrett Wollman return EADDRNOTAVAIL; 12381ede983cSDag-Erling Smørgrav sdl = malloc(sizeof *sdl, M_IFMADDR, 123909df718eSRobert Watson M_NOWAIT|M_ZERO); 124009df718eSRobert Watson if (sdl == NULL) 124109df718eSRobert Watson return ENOMEM; 12421158dfb7SGarrett Wollman sdl->sdl_len = sizeof *sdl; 12431158dfb7SGarrett Wollman sdl->sdl_family = AF_LINK; 12441158dfb7SGarrett Wollman sdl->sdl_index = ifp->if_index; 12451158dfb7SGarrett Wollman sdl->sdl_type = IFT_ETHER; 12461158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 12471158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 12481158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 12491158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 12501158dfb7SGarrett Wollman return 0; 12511158dfb7SGarrett Wollman #endif 125282cd038dSYoshinobu Inoue #ifdef INET6 125382cd038dSYoshinobu Inoue case AF_INET6: 125482cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1255595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1256595b8a1cSJun-ichiro itojun Hagino /* 1257595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1258595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1259595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1260595b8a1cSJun-ichiro itojun Hagino */ 1261595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1262595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1263595b8a1cSJun-ichiro itojun Hagino return 0; 1264595b8a1cSJun-ichiro itojun Hagino } 126582cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 126682cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 12671ede983cSDag-Erling Smørgrav sdl = malloc(sizeof *sdl, M_IFMADDR, 126809df718eSRobert Watson M_NOWAIT|M_ZERO); 126909df718eSRobert Watson if (sdl == NULL) 127009df718eSRobert Watson return (ENOMEM); 127182cd038dSYoshinobu Inoue sdl->sdl_len = sizeof *sdl; 127282cd038dSYoshinobu Inoue sdl->sdl_family = AF_LINK; 127382cd038dSYoshinobu Inoue sdl->sdl_index = ifp->if_index; 127482cd038dSYoshinobu Inoue sdl->sdl_type = IFT_ETHER; 127582cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 127682cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 127782cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 127882cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 127982cd038dSYoshinobu Inoue return 0; 128082cd038dSYoshinobu Inoue #endif 12811158dfb7SGarrett Wollman 12821158dfb7SGarrett Wollman default: 12831158dfb7SGarrett Wollman /* 12841158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 12851158dfb7SGarrett Wollman * that counts... 12861158dfb7SGarrett Wollman */ 12871158dfb7SGarrett Wollman return EAFNOSUPPORT; 12881158dfb7SGarrett Wollman } 12891158dfb7SGarrett Wollman } 129040811c14SMatthew N. Dodd 1291fc74a9f9SBrooks Davis static void* 1292fc74a9f9SBrooks Davis ether_alloc(u_char type, struct ifnet *ifp) 1293fc74a9f9SBrooks Davis { 1294fc74a9f9SBrooks Davis struct arpcom *ac; 1295fc74a9f9SBrooks Davis 1296fc74a9f9SBrooks Davis ac = malloc(sizeof(struct arpcom), M_ARPCOM, M_WAITOK | M_ZERO); 1297fc74a9f9SBrooks Davis ac->ac_ifp = ifp; 1298fc74a9f9SBrooks Davis 1299fc74a9f9SBrooks Davis return (ac); 1300fc74a9f9SBrooks Davis } 1301fc74a9f9SBrooks Davis 1302fc74a9f9SBrooks Davis static void 1303fc74a9f9SBrooks Davis ether_free(void *com, u_char type) 1304fc74a9f9SBrooks Davis { 1305fc74a9f9SBrooks Davis 1306fc74a9f9SBrooks Davis free(com, M_ARPCOM); 1307fc74a9f9SBrooks Davis } 1308fc74a9f9SBrooks Davis 1309fc74a9f9SBrooks Davis static int 1310fc74a9f9SBrooks Davis ether_modevent(module_t mod, int type, void *data) 1311fc74a9f9SBrooks Davis { 1312fc74a9f9SBrooks Davis 1313fc74a9f9SBrooks Davis switch (type) { 1314fc74a9f9SBrooks Davis case MOD_LOAD: 1315fc74a9f9SBrooks Davis if_register_com_alloc(IFT_ETHER, ether_alloc, ether_free); 1316fc74a9f9SBrooks Davis break; 1317fc74a9f9SBrooks Davis case MOD_UNLOAD: 1318fc74a9f9SBrooks Davis if_deregister_com_alloc(IFT_ETHER); 1319fc74a9f9SBrooks Davis break; 1320fc74a9f9SBrooks Davis default: 1321fc74a9f9SBrooks Davis return EOPNOTSUPP; 1322fc74a9f9SBrooks Davis } 1323fc74a9f9SBrooks Davis 1324fc74a9f9SBrooks Davis return (0); 1325fc74a9f9SBrooks Davis } 1326fc74a9f9SBrooks Davis 132740811c14SMatthew N. Dodd static moduledata_t ether_mod = { 132840811c14SMatthew N. Dodd "ether", 1329fc74a9f9SBrooks Davis ether_modevent, 133040811c14SMatthew N. Dodd 0 133140811c14SMatthew N. Dodd }; 133240811c14SMatthew N. Dodd 133352f1277eSChristian S.J. Peron void 133452f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 133552f1277eSChristian S.J. Peron { 133652f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 133752f1277eSChristian S.J. Peron struct mbuf mv, mb; 133852f1277eSChristian S.J. Peron 133952f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 134052f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 134152f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 134252f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 134352f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 134452f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 134552f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 134652f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 134752f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 134852f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 134952f1277eSChristian S.J. Peron /* 135052f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 135152f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 135252f1277eSChristian S.J. Peron * 135352f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 135452f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 135552f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 135652f1277eSChristian S.J. Peron * 135752f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 135852f1277eSChristian S.J. Peron */ 135952f1277eSChristian S.J. Peron if (data != NULL) { 136052f1277eSChristian S.J. Peron mv.m_next = m; 136152f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 136252f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 136352f1277eSChristian S.J. Peron mb.m_next = &mv; 136452f1277eSChristian S.J. Peron mb.m_data = data; 136552f1277eSChristian S.J. Peron mb.m_len = dlen; 136652f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 136752f1277eSChristian S.J. Peron } else 136852f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 136952f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 137052f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 137152f1277eSChristian S.J. Peron } 137252f1277eSChristian S.J. Peron 137360e87ca8SAndrew Thompson struct mbuf * 1374a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 137560e87ca8SAndrew Thompson { 137660e87ca8SAndrew Thompson struct ether_vlan_header *evl; 137760e87ca8SAndrew Thompson 137860e87ca8SAndrew Thompson M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_DONTWAIT); 137960e87ca8SAndrew Thompson if (m == NULL) 138060e87ca8SAndrew Thompson return (NULL); 138160e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 138260e87ca8SAndrew Thompson 138360e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 138460e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 138560e87ca8SAndrew Thompson if (m == NULL) 138660e87ca8SAndrew Thompson return (NULL); 138760e87ca8SAndrew Thompson } 138860e87ca8SAndrew Thompson 138960e87ca8SAndrew Thompson /* 139060e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 139160e87ca8SAndrew Thompson * with 802.1Q encapsulation. 139260e87ca8SAndrew Thompson */ 139360e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 139460e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 139560e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 139660e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 139760e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 139860e87ca8SAndrew Thompson return (m); 139960e87ca8SAndrew Thompson } 140060e87ca8SAndrew Thompson 1401fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 140240811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1403