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" 38a9771948SGleb Smirnoff #include "opt_carp.h" 396eeac1d9SJulian Elischer #include "opt_mbuf_profiling.h" 40430df5f4SEivind Eklund 41df8bae1dSRodney W. Grimes #include <sys/param.h> 42df8bae1dSRodney W. Grimes #include <sys/systm.h> 43df8bae1dSRodney W. Grimes #include <sys/kernel.h> 44385195c0SMarko Zec #include <sys/lock.h> 45df8bae1dSRodney W. Grimes #include <sys/malloc.h> 4641ee9f1cSPoul-Henning Kamp #include <sys/module.h> 47df8bae1dSRodney W. Grimes #include <sys/mbuf.h> 4810b1fde0SMark Murray #include <sys/random.h> 49385195c0SMarko Zec #include <sys/rwlock.h> 50df8bae1dSRodney W. Grimes #include <sys/socket.h> 5151a53488SBruce Evans #include <sys/sockio.h> 52602d513cSGarrett Wollman #include <sys/sysctl.h> 53603724d3SBjoern A. Zeeb #include <sys/vimage.h> 54df8bae1dSRodney W. Grimes 55df8bae1dSRodney W. Grimes #include <net/if.h> 56d7647d96SDag-Erling Smørgrav #include <net/if_arp.h> 57df8bae1dSRodney W. Grimes #include <net/netisr.h> 58df8bae1dSRodney W. Grimes #include <net/route.h> 59df8bae1dSRodney W. Grimes #include <net/if_llc.h> 60df8bae1dSRodney W. Grimes #include <net/if_dl.h> 61df8bae1dSRodney W. Grimes #include <net/if_types.h> 622e2de7f2SArchie Cobbs #include <net/bpf.h> 63e1e1452dSArchie Cobbs #include <net/ethernet.h> 64fd6238a6SAndrew Thompson #include <net/if_bridgevar.h> 65c1d93b05SSam Leffler #include <net/if_vlan_var.h> 666e6b3f7cSQing Li #include <net/if_llatbl.h> 6760ee3847SMax Laier #include <net/pf_mtag.h> 684b79449eSBjoern A. Zeeb #include <net/vnet.h> 69df8bae1dSRodney W. Grimes 7082cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 71df8bae1dSRodney W. Grimes #include <netinet/in.h> 72df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 73df8bae1dSRodney W. Grimes #include <netinet/if_ether.h> 744b984093SLuigi Rizzo #include <netinet/ip_fw.h> 754b984093SLuigi Rizzo #include <netinet/ip_dummynet.h> 76385195c0SMarko Zec #include <netinet/vinet.h> 771d5e9e22SEivind Eklund #endif 7882cd038dSYoshinobu Inoue #ifdef INET6 7982cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 8082cd038dSYoshinobu Inoue #endif 81df8bae1dSRodney W. Grimes 82259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 83a9771948SGleb Smirnoff #ifdef DEV_CARP 84a9771948SGleb Smirnoff #include <netinet/ip_carp.h> 85a9771948SGleb Smirnoff #endif 86259d2d54SBjoern A. Zeeb #endif 87a9771948SGleb Smirnoff 88cc6a66f2SJulian Elischer #ifdef IPX 89cc6a66f2SJulian Elischer #include <netipx/ipx.h> 90cc6a66f2SJulian Elischer #include <netipx/ipx_if.h> 91a1026028SMaxim Sobolev #endif 926e6b3f7cSQing Li 934f93599fSBoris Popov int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m); 945accfb8cSBoris Popov int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp, 952a7e8eceSBoris Popov struct sockaddr *dst, short *tp, int *hlen); 96cc6a66f2SJulian Elischer 97655929bfSJulian Elischer #ifdef NETATALK 98655929bfSJulian Elischer #include <netatalk/at.h> 99655929bfSJulian Elischer #include <netatalk/at_var.h> 100655929bfSJulian Elischer #include <netatalk/at_extern.h> 101655929bfSJulian Elischer 102655929bfSJulian Elischer #define llc_snap_org_code llc_un.type_snap.org_code 103655929bfSJulian Elischer #define llc_snap_ether_type llc_un.type_snap.ether_type 104655929bfSJulian Elischer 105655929bfSJulian Elischer extern u_char at_org_code[3]; 106655929bfSJulian Elischer extern u_char aarp_org_code[3]; 1072cc2df49SGarrett Wollman #endif /* NETATALK */ 1082cc2df49SGarrett Wollman 109aed55708SRobert Watson #include <security/mac/mac_framework.h> 110aed55708SRobert Watson 111d54d93acSEd Maste #ifdef CTASSERT 112d54d93acSEd Maste CTASSERT(sizeof (struct ether_header) == ETHER_ADDR_LEN * 2 + 2); 113d54d93acSEd Maste CTASSERT(sizeof (struct ether_addr) == ETHER_ADDR_LEN); 114d54d93acSEd Maste #endif 115d54d93acSEd Maste 116e1e1452dSArchie Cobbs /* netgraph node hooks for ng_ether(4) */ 117c1d93b05SSam Leffler void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 118c1d93b05SSam Leffler void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 119e1e1452dSArchie Cobbs int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 120e1e1452dSArchie Cobbs void (*ng_ether_attach_p)(struct ifnet *ifp); 121e1e1452dSArchie Cobbs void (*ng_ether_detach_p)(struct ifnet *ifp); 122e1e1452dSArchie Cobbs 123824eb9dcSDavid E. O'Brien void (*vlan_input_p)(struct ifnet *, struct mbuf *); 1249d4fe4b2SBrooks Davis 125fd6238a6SAndrew Thompson /* if_bridge(4) support */ 1268f867517SAndrew Thompson struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *); 1278f867517SAndrew Thompson int (*bridge_output_p)(struct ifnet *, struct mbuf *, 1288f867517SAndrew Thompson struct sockaddr *, struct rtentry *); 129c8b01292SAndrew Thompson void (*bridge_dn_p)(struct mbuf *, struct ifnet *); 1308f867517SAndrew Thompson 13118242d3bSAndrew Thompson /* if_lagg(4) support */ 13218242d3bSAndrew Thompson struct mbuf *(*lagg_input_p)(struct ifnet *, struct mbuf *); 133b47888ceSAndrew Thompson 134e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 135868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 136868d8b62SMatthew N. Dodd 137929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 138929ddbbbSAlfred Perlstein struct sockaddr *); 139868d8b62SMatthew N. Dodd 140fc74a9f9SBrooks Davis /* XXX: should be in an arp support file, not here */ 141fc74a9f9SBrooks Davis MALLOC_DEFINE(M_ARPCOM, "arpcom", "802.* interface internals"); 142fc74a9f9SBrooks Davis 14369462a82SBruce M Simpson #define ETHER_IS_BROADCAST(addr) \ 14469462a82SBruce M Simpson (bcmp(etherbroadcastaddr, (addr), ETHER_ADDR_LEN) == 0) 14569462a82SBruce M Simpson 1464c8e8c05SJulian Elischer #define senderr(e) do { error = (e); goto bad;} while (0) 147df8bae1dSRodney W. Grimes 148d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 1494b984093SLuigi Rizzo int 150dda10d62SOleg Bulyzhin ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, int shared); 15144e33a07SMarko Zec #ifdef VIMAGE_GLOBALS 1524b984093SLuigi Rizzo static int ether_ipfw; 153d7647d96SDag-Erling Smørgrav #endif 15444e33a07SMarko Zec #endif 1554b984093SLuigi Rizzo 1566e6b3f7cSQing Li 157df8bae1dSRodney W. Grimes /* 158df8bae1dSRodney W. Grimes * Ethernet output routine. 159df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 160df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 161df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 162df8bae1dSRodney W. Grimes */ 163df8bae1dSRodney W. Grimes int 16472fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 165279aa3d4SKip Macy struct sockaddr *dst, struct route *ro) 166df8bae1dSRodney W. Grimes { 167df8bae1dSRodney W. Grimes short type; 168279aa3d4SKip Macy int error = 0, hdrcmplt = 0; 16964760eb0SWarner Losh u_char esrc[ETHER_ADDR_LEN], edst[ETHER_ADDR_LEN]; 1706e6b3f7cSQing Li struct llentry *lle = NULL; 171279aa3d4SKip Macy struct rtentry *rt0 = NULL; 172098a8c3bSMatthew N. Dodd struct ether_header *eh; 17360ee3847SMax Laier struct pf_mtag *t; 174c54c76ccSOleg Bulyzhin int loop_copy = 1; 175d32864c3SRobert Watson int hlen; /* link layer header length */ 176df8bae1dSRodney W. Grimes 177279aa3d4SKip Macy if (ro != NULL) { 178279aa3d4SKip Macy lle = ro->ro_lle; 179279aa3d4SKip Macy rt0 = ro->ro_rt; 180279aa3d4SKip Macy } 18143b29369SRobert Watson #ifdef MAC 18230d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 18343b29369SRobert Watson if (error) 18443b29369SRobert Watson senderr(error); 18543b29369SRobert Watson #endif 18643b29369SRobert Watson 1876eeac1d9SJulian Elischer M_PROFILE(m); 188afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 189afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 19013f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 19113f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 192df8bae1dSRodney W. Grimes senderr(ENETDOWN); 1937f760c48SMatthew N. Dodd 19484dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 195df8bae1dSRodney W. Grimes switch (dst->sa_family) { 196df8bae1dSRodney W. Grimes #ifdef INET 197df8bae1dSRodney W. Grimes case AF_INET: 198279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 199279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 200279aa3d4SKip Macy else 2016e6b3f7cSQing Li error = arpresolve(ifp, rt0, m, dst, edst, &lle); 202cd46a114SLuigi Rizzo if (error) 203cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 20434bed8b0SDavid Greenman type = htons(ETHERTYPE_IP); 205df8bae1dSRodney W. Grimes break; 20643a6c75aSMatthew N. Dodd case AF_ARP: 20743a6c75aSMatthew N. Dodd { 20843a6c75aSMatthew N. Dodd struct arphdr *ah; 20943a6c75aSMatthew N. Dodd ah = mtod(m, struct arphdr *); 21043a6c75aSMatthew N. Dodd ah->ar_hrd = htons(ARPHRD_ETHER); 21143a6c75aSMatthew N. Dodd 212c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 21343a6c75aSMatthew N. Dodd 21443a6c75aSMatthew N. Dodd switch(ntohs(ah->ar_op)) { 21543a6c75aSMatthew N. Dodd case ARPOP_REVREQUEST: 21643a6c75aSMatthew N. Dodd case ARPOP_REVREPLY: 21743a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_REVARP); 21843a6c75aSMatthew N. Dodd break; 21943a6c75aSMatthew N. Dodd case ARPOP_REQUEST: 22043a6c75aSMatthew N. Dodd case ARPOP_REPLY: 22143a6c75aSMatthew N. Dodd default: 22243a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_ARP); 22343a6c75aSMatthew N. Dodd break; 22443a6c75aSMatthew N. Dodd } 22543a6c75aSMatthew N. Dodd 22643a6c75aSMatthew N. Dodd if (m->m_flags & M_BCAST) 22743a6c75aSMatthew N. Dodd bcopy(ifp->if_broadcastaddr, edst, ETHER_ADDR_LEN); 22843a6c75aSMatthew N. Dodd else 22943a6c75aSMatthew N. Dodd bcopy(ar_tha(ah), edst, ETHER_ADDR_LEN); 23043a6c75aSMatthew N. Dodd 23143a6c75aSMatthew N. Dodd } 23243a6c75aSMatthew N. Dodd break; 233df8bae1dSRodney W. Grimes #endif 23482cd038dSYoshinobu Inoue #ifdef INET6 23582cd038dSYoshinobu Inoue case AF_INET6: 236279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 237279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 238279aa3d4SKip Macy else 2399928dafbSQing Li error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle); 240cd46a114SLuigi Rizzo if (error) 241cd46a114SLuigi Rizzo return error; 24282cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 24382cd038dSYoshinobu Inoue break; 24482cd038dSYoshinobu Inoue #endif 245cc6a66f2SJulian Elischer #ifdef IPX 246cc6a66f2SJulian Elischer case AF_IPX: 2474f93599fSBoris Popov if (ef_outputp) { 2482a7e8eceSBoris Popov error = ef_outputp(ifp, &m, dst, &type, &hlen); 2495accfb8cSBoris Popov if (error) 2505accfb8cSBoris Popov goto bad; 2514f93599fSBoris Popov } else 25234bed8b0SDavid Greenman type = htons(ETHERTYPE_IPX); 253cc6a66f2SJulian Elischer bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 254cc6a66f2SJulian Elischer (caddr_t)edst, sizeof (edst)); 255cc6a66f2SJulian Elischer break; 256cc6a66f2SJulian Elischer #endif 257655929bfSJulian Elischer #ifdef NETATALK 258655929bfSJulian Elischer case AF_APPLETALK: 2591d0eab59SJulian Elischer { 260ed7509acSJulian Elischer struct at_ifaddr *aa; 2611d0eab59SJulian Elischer 262cd46a114SLuigi Rizzo if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) 263cd46a114SLuigi Rizzo senderr(EHOSTUNREACH); /* XXX */ 264cd46a114SLuigi Rizzo if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) 2651d0eab59SJulian Elischer return (0); 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 2727e2041e0SRobert Watson M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); 2732166ffe8SRobert Watson if (m == NULL) 2742166ffe8SRobert Watson senderr(ENOBUFS); 275655929bfSJulian Elischer llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 276655929bfSJulian Elischer llc.llc_control = LLC_UI; 277655929bfSJulian Elischer bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 278655929bfSJulian Elischer llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 279797f247bSMatthew N. Dodd bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 28034bed8b0SDavid Greenman type = htons(m->m_pkthdr.len); 281797f247bSMatthew N. Dodd hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN; 282655929bfSJulian Elischer } else { 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 #ifdef DEV_CARP 400a9771948SGleb Smirnoff if (ifp->if_carp && 401a9771948SGleb Smirnoff (error = carp_output(ifp, m, dst, NULL))) 402a9771948SGleb Smirnoff goto bad; 403a9771948SGleb Smirnoff #endif 404259d2d54SBjoern A. Zeeb #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) 4338b615593SMarko Zec INIT_VNET_NET(ifp->if_vnet); 4342b25acc1SLuigi Rizzo 435115a40c7SLuigi Rizzo if (ip_fw_chk_ptr && V_ether_ipfw != 0) { 436dda10d62SOleg Bulyzhin if (ether_ipfw_chk(&m, ifp, 0) == 0) { 4374b984093SLuigi Rizzo if (m) { 4384b984093SLuigi Rizzo m_freem(m); 439e7909401SDavid Malone return EACCES; /* pkt dropped */ 4404b984093SLuigi Rizzo } else 4414b984093SLuigi Rizzo return 0; /* consumed e.g. in a pipe */ 4424b984093SLuigi Rizzo } 4434b984093SLuigi Rizzo } 444d7647d96SDag-Erling Smørgrav #endif 4452b25acc1SLuigi Rizzo 446df8bae1dSRodney W. Grimes /* 447df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 448df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 449df8bae1dSRodney W. Grimes */ 450aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 451df8bae1dSRodney W. Grimes } 452df8bae1dSRodney W. Grimes 453d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 454df8bae1dSRodney W. Grimes /* 4554b984093SLuigi Rizzo * ipfw processing for ethernet packets (in and out). 4564b984093SLuigi Rizzo * The second parameter is NULL from ether_demux, and ifp from 457b6de9e91SMax Laier * ether_output_frame. 4584b984093SLuigi Rizzo */ 4594b984093SLuigi Rizzo int 460dda10d62SOleg Bulyzhin ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, int shared) 4614b984093SLuigi Rizzo { 462385195c0SMarko Zec INIT_VNET_INET(dst->if_vnet); 463c1d93b05SSam Leffler struct ether_header *eh; 464c1d93b05SSam Leffler struct ether_header save_eh; 465c1d93b05SSam Leffler struct mbuf *m; 4664b984093SLuigi Rizzo int i; 4672b25acc1SLuigi Rizzo struct ip_fw_args args; 468dda10d62SOleg Bulyzhin struct dn_pkt_tag *dn_tag; 4694b984093SLuigi Rizzo 470dda10d62SOleg Bulyzhin dn_tag = ip_dn_claim_tag(*m0); 471dda10d62SOleg Bulyzhin 472dda10d62SOleg Bulyzhin if (dn_tag != NULL) { 473dda10d62SOleg Bulyzhin if (dn_tag->rule != NULL && V_fw_one_pass) 474dda10d62SOleg Bulyzhin /* dummynet packet, already partially processed */ 475dda10d62SOleg Bulyzhin return (1); 476dda10d62SOleg Bulyzhin args.rule = dn_tag->rule; /* matching rule to restart */ 477dda10d62SOleg Bulyzhin args.rule_id = dn_tag->rule_id; 478dda10d62SOleg Bulyzhin args.chain_id = dn_tag->chain_id; 479dda10d62SOleg Bulyzhin } else 480dda10d62SOleg Bulyzhin args.rule = NULL; 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 */ 5042b25acc1SLuigi Rizzo i = 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)) { 5314b984093SLuigi Rizzo /* 5324b984093SLuigi Rizzo * Pass the pkt to dummynet, which consumes it. 5334b984093SLuigi Rizzo * If shared, make a copy and keep the original. 5344b984093SLuigi Rizzo */ 5354b984093SLuigi Rizzo if (shared) { 536a163d034SWarner Losh m = m_copypacket(m, M_DONTWAIT); 5372b25acc1SLuigi Rizzo if (m == NULL) 5384b984093SLuigi Rizzo return 0; 5394b984093SLuigi Rizzo } else { 5402b25acc1SLuigi Rizzo /* 541c1d93b05SSam Leffler * Pass the original to dummynet and 542c1d93b05SSam Leffler * nothing back to the caller 5432b25acc1SLuigi Rizzo */ 544c1d93b05SSam Leffler *m0 = NULL ; 5454b984093SLuigi Rizzo } 546897c0f57SOleg Bulyzhin ip_dn_io_ptr(&m, dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args); 5474b984093SLuigi Rizzo return 0; 5484b984093SLuigi Rizzo } 5494b984093SLuigi Rizzo /* 5502f8ebbf4SLuigi Rizzo * XXX at some point add support for divert/forward actions. 5512f8ebbf4SLuigi Rizzo * If none of the above matches, we have to drop the pkt. 5524b984093SLuigi Rizzo */ 5534b984093SLuigi Rizzo return 0; 5544b984093SLuigi Rizzo } 555d7647d96SDag-Erling Smørgrav #endif 5564b984093SLuigi Rizzo 5574b984093SLuigi Rizzo /* 558c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 559c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 560df8bae1dSRodney W. Grimes */ 561c1d93b05SSam Leffler static void 562c1d93b05SSam Leffler ether_input(struct ifnet *ifp, struct mbuf *m) 563df8bae1dSRodney W. Grimes { 564c1d93b05SSam Leffler struct ether_header *eh; 565c1d93b05SSam Leffler u_short etype; 566df8bae1dSRodney W. Grimes 56769462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 56869462a82SBruce M Simpson m_freem(m); 56969462a82SBruce M Simpson return; 57069462a82SBruce M Simpson } 57169462a82SBruce M Simpson #ifdef DIAGNOSTIC 57269462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 57369462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 57469462a82SBruce M Simpson m_freem(m); 57569462a82SBruce M Simpson return; 57669462a82SBruce M Simpson } 57769462a82SBruce M Simpson #endif 578c1d93b05SSam Leffler /* 579c1d93b05SSam Leffler * Do consistency checks to verify assumptions 580c1d93b05SSam Leffler * made by code past this point. 581c1d93b05SSam Leffler */ 582c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 583c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 584c1d93b05SSam Leffler ifp->if_ierrors++; 585c939f1aeSLuigi Rizzo m_freem(m); 586c939f1aeSLuigi Rizzo return; 587c939f1aeSLuigi Rizzo } 588797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 589c1d93b05SSam Leffler /* XXX maybe should pullup? */ 590c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 591c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 592c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 593c1d93b05SSam Leffler ifp->if_ierrors++; 594c1d93b05SSam Leffler m_freem(m); 595c1d93b05SSam Leffler return; 5962e2de7f2SArchie Cobbs } 597c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 598c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 599c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 600c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 601c1d93b05SSam Leffler ifp->if_ierrors++; 602c1d93b05SSam Leffler m_freem(m); 603c1d93b05SSam Leffler return; 604c1d93b05SSam Leffler } 605c1d93b05SSam Leffler #ifdef DIAGNOSTIC 606c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 6079bf40edeSBrooks Davis if_printf(ifp, "Warning, frame marked as received on %s\n", 6089bf40edeSBrooks Davis m->m_pkthdr.rcvif->if_xname); 609c1d93b05SSam Leffler } 610c1d93b05SSam Leffler #endif 611c1d93b05SSam Leffler 61221ca7b57SMarko Zec CURVNET_SET_QUIET(ifp->if_vnet); 61321ca7b57SMarko Zec 61469462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 61569462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 61669462a82SBruce M Simpson m->m_flags |= M_BCAST; 61769462a82SBruce M Simpson else 61869462a82SBruce M Simpson m->m_flags |= M_MCAST; 61969462a82SBruce M Simpson ifp->if_imcasts++; 62069462a82SBruce M Simpson } 62169462a82SBruce M Simpson 622533d8562SRobert Watson #ifdef MAC 623533d8562SRobert Watson /* 624533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 625533d8562SRobert Watson * consumers can get to it. 626533d8562SRobert Watson */ 62730d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 628533d8562SRobert Watson #endif 629533d8562SRobert Watson 630c1d93b05SSam Leffler /* 63169462a82SBruce M Simpson * Give bpf a chance at the packet. 632c1d93b05SSam Leffler */ 633d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 6342e2de7f2SArchie Cobbs 63569462a82SBruce M Simpson /* 63669462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 63769462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 63869462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 63969462a82SBruce M Simpson */ 640c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 641c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 642c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 643c1d93b05SSam Leffler } 644c1d93b05SSam Leffler 645c1d93b05SSam Leffler ifp->if_ibytes += m->m_pkthdr.len; 64605463bb5SDavid Greenman 64769462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 648de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 649de572b37SChristian S.J. Peron m_freem(m); 65021ca7b57SMarko Zec CURVNET_RESTORE(); 651de572b37SChristian S.J. Peron return; 652de572b37SChristian S.J. Peron } 653de572b37SChristian S.J. Peron 65418242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 655b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 65618242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 65718242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 65818242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 659b47888ceSAndrew Thompson if (m != NULL) 660b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 661b47888ceSAndrew Thompson else 662b47888ceSAndrew Thompson return; 663b47888ceSAndrew Thompson } 664b47888ceSAndrew Thompson 66569462a82SBruce M Simpson /* 66669462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 66769462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 66869462a82SBruce M Simpson * path correctly. 66969462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 67069462a82SBruce M Simpson */ 67169462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 67269462a82SBruce M Simpson struct ether_vlan_header *evl; 67369462a82SBruce M Simpson 67469462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 67569462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 676402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 67769462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 678402d5e27SBruce M Simpson #endif 67969462a82SBruce M Simpson ifp->if_ierrors++; 68069462a82SBruce M Simpson m_freem(m); 68169462a82SBruce M Simpson return; 68269462a82SBruce M Simpson } 68369462a82SBruce M Simpson 68469462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 68569462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 68669462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 68769462a82SBruce M Simpson 68869462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 68969462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 69069462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 69169462a82SBruce M Simpson } 69269462a82SBruce M Simpson 69369462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 694eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 695514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 69669462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 69769462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 698c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 69921ca7b57SMarko Zec if (m == NULL) { 70021ca7b57SMarko Zec CURVNET_RESTORE(); 701e1e1452dSArchie Cobbs return; 702e1e1452dSArchie Cobbs } 70321ca7b57SMarko Zec } 704e1e1452dSArchie Cobbs 7058f867517SAndrew Thompson /* 70669462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 70769462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 70869462a82SBruce M Simpson * and the frame should be delivered locally. 7098f867517SAndrew Thompson */ 71069462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 71169462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 712fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 71321ca7b57SMarko Zec if (m == NULL) { 71421ca7b57SMarko Zec CURVNET_RESTORE(); 7158f867517SAndrew Thompson return; 7168f867517SAndrew Thompson } 71721ca7b57SMarko Zec } 7188f867517SAndrew Thompson 719259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 72069462a82SBruce M Simpson #ifdef DEV_CARP 72169462a82SBruce M Simpson /* 72269462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 72369462a82SBruce M Simpson * mbuf flows up to Layer 3. 72469462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 72569462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 72669462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 72769462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 72869462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 72969462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 73069462a82SBruce M Simpson */ 73169462a82SBruce M Simpson if (ifp->if_carp && carp_forus(ifp->if_carp, eh->ether_dhost)) { 73269462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 73369462a82SBruce M Simpson } else 73469462a82SBruce M Simpson #endif 735259d2d54SBjoern A. Zeeb #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 /* 758e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 759e1e1452dSArchie Cobbs */ 760e1e1452dSArchie Cobbs void 761c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 762e1e1452dSArchie Cobbs { 763c1d93b05SSam Leffler struct ether_header *eh; 7641cafed39SJonathan Lemon int isr; 765e1e1452dSArchie Cobbs u_short ether_type; 766e1e1452dSArchie Cobbs #if defined(NETATALK) 767098a8c3bSMatthew N. Dodd struct llc *l; 768e1e1452dSArchie Cobbs #endif 76969462a82SBruce M Simpson 77069462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 77169462a82SBruce M Simpson 772d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 7738b615593SMarko Zec INIT_VNET_NET(ifp->if_vnet); 77469462a82SBruce M Simpson /* 77569462a82SBruce M Simpson * Allow dummynet and/or ipfw to claim the frame. 77669462a82SBruce M Simpson * Do not do this for PROMISC frames in case we are re-entered. 77769462a82SBruce M Simpson */ 778115a40c7SLuigi Rizzo if (ip_fw_chk_ptr && V_ether_ipfw != 0 && !(m->m_flags & M_PROMISC)) { 779dda10d62SOleg Bulyzhin if (ether_ipfw_chk(&m, NULL, 0) == 0) { 78069462a82SBruce M Simpson if (m) 78169462a82SBruce M Simpson m_freem(m); /* dropped; free mbuf chain */ 78269462a82SBruce M Simpson return; /* consumed */ 78369462a82SBruce M Simpson } 78469462a82SBruce M Simpson } 785d7647d96SDag-Erling Smørgrav #endif 786c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 787cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 788c1d93b05SSam Leffler 789a9771948SGleb Smirnoff /* 79069462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 79169462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 792a9771948SGleb Smirnoff */ 79369462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 79469462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 79575ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 7966c23e6ccSRuslan Ermilov ifp->if_noproto++; 7976c23e6ccSRuslan Ermilov m_freem(m); 7986c23e6ccSRuslan Ermilov return; 7996c23e6ccSRuslan Ermilov } 80069462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 80169462a82SBruce M Simpson __func__)); 80269462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 80369462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 804c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 805c1d93b05SSam Leffler return; 806c1d93b05SSam Leffler } 807c1d93b05SSam Leffler 808c1d93b05SSam Leffler /* 80969462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 81069462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 811c1d93b05SSam Leffler */ 81269462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 813c1d93b05SSam Leffler m_freem(m); 814c1d93b05SSam Leffler return; 815c1d93b05SSam Leffler } 816c1d93b05SSam Leffler 81769462a82SBruce M Simpson /* 81869462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 81969462a82SBruce M Simpson * Strip off Ethernet header. 82069462a82SBruce M Simpson */ 82169462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 82269462a82SBruce M Simpson m->m_flags &= ~(M_PROTOFLAGS); 823797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 824c1d93b05SSam Leffler 82569462a82SBruce M Simpson /* 82669462a82SBruce M Simpson * Dispatch frame to upper layer. 82769462a82SBruce M Simpson */ 828307d80beSDavid Greenman switch (ether_type) { 829df8bae1dSRodney W. Grimes #ifdef INET 830df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 8315d691e6dSAndre Oppermann if ((m = ip_fastforward(m)) == NULL) 8321f91d8c5SDavid Greenman return; 8331cafed39SJonathan Lemon isr = NETISR_IP; 834df8bae1dSRodney W. Grimes break; 835df8bae1dSRodney W. Grimes 836df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 83708aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 83808aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 83908aadfbbSJonathan Lemon m_freem(m); 84008aadfbbSJonathan Lemon return; 84108aadfbbSJonathan Lemon } 8421cafed39SJonathan Lemon isr = NETISR_ARP; 843df8bae1dSRodney W. Grimes break; 844df8bae1dSRodney W. Grimes #endif 845cc6a66f2SJulian Elischer #ifdef IPX 846cc6a66f2SJulian Elischer case ETHERTYPE_IPX: 8474f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 8484f93599fSBoris Popov return; 8491cafed39SJonathan Lemon isr = NETISR_IPX; 850cc6a66f2SJulian Elischer break; 851cc6a66f2SJulian Elischer #endif 85282cd038dSYoshinobu Inoue #ifdef INET6 85382cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 8541cafed39SJonathan Lemon isr = NETISR_IPV6; 85582cd038dSYoshinobu Inoue break; 85682cd038dSYoshinobu Inoue #endif 857655929bfSJulian Elischer #ifdef NETATALK 858655929bfSJulian Elischer case ETHERTYPE_AT: 8591cafed39SJonathan Lemon isr = NETISR_ATALK1; 860655929bfSJulian Elischer break; 861655929bfSJulian Elischer case ETHERTYPE_AARP: 8621cafed39SJonathan Lemon isr = NETISR_AARP; 8631cafed39SJonathan Lemon break; 8648cdfefbdSPeter Wemm #endif /* NETATALK */ 865df8bae1dSRodney W. Grimes default: 8664f93599fSBoris Popov #ifdef IPX 8674f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 8684f93599fSBoris Popov return; 8694f93599fSBoris Popov #endif /* IPX */ 870242c5536SPeter Wemm #if defined(NETATALK) 871307d80beSDavid Greenman if (ether_type > ETHERMTU) 872c1d93b05SSam Leffler goto discard; 873df8bae1dSRodney W. Grimes l = mtod(m, struct llc *); 8741cafed39SJonathan Lemon if (l->llc_dsap == LLC_SNAP_LSAP && 8751cafed39SJonathan Lemon l->llc_ssap == LLC_SNAP_LSAP && 8761cafed39SJonathan Lemon l->llc_control == LLC_UI) { 8774158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], at_org_code, 878655929bfSJulian Elischer sizeof(at_org_code)) == 0 && 879655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 880797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8811cafed39SJonathan Lemon isr = NETISR_ATALK2; 882655929bfSJulian Elischer break; 883655929bfSJulian Elischer } 8844158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 885655929bfSJulian Elischer sizeof(aarp_org_code)) == 0 && 886655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 887797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8881cafed39SJonathan Lemon isr = NETISR_AARP; 889655929bfSJulian Elischer break; 890df8bae1dSRodney W. Grimes } 8911cafed39SJonathan Lemon } 892242c5536SPeter Wemm #endif /* NETATALK */ 8931cafed39SJonathan Lemon goto discard; 894df8bae1dSRodney W. Grimes } 8951cafed39SJonathan Lemon netisr_dispatch(isr, m); 896c1d93b05SSam Leffler return; 8971cafed39SJonathan Lemon 898c1d93b05SSam Leffler discard: 899c1d93b05SSam Leffler /* 900c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 901c1d93b05SSam Leffler * hand the packet to it for last chance processing; 902c1d93b05SSam Leffler * otherwise dispose of it. 903c1d93b05SSam Leffler */ 904eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 905514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 906514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 907c1d93b05SSam Leffler /* 908c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 909c1d93b05SSam Leffler * consistent view of inbound packets. 910c1d93b05SSam Leffler */ 911797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 912c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 913c1d93b05SSam Leffler return; 914c1d93b05SSam Leffler } 915c1d93b05SSam Leffler m_freem(m); 916c1d93b05SSam Leffler } 917c1d93b05SSam Leffler 918c1d93b05SSam Leffler /* 919c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 920c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 921c1d93b05SSam Leffler * 922c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 923c1d93b05SSam Leffler * 924c1d93b05SSam Leffler * since there's no static buffer involved. 925c1d93b05SSam Leffler */ 926c1d93b05SSam Leffler char * 927c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 928c1d93b05SSam Leffler { 929c1d93b05SSam Leffler static char etherbuf[18]; 930c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 931c1d93b05SSam Leffler return (etherbuf); 932df8bae1dSRodney W. Grimes } 933df8bae1dSRodney W. Grimes 934df8bae1dSRodney W. Grimes /* 935df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 936df8bae1dSRodney W. Grimes */ 937df8bae1dSRodney W. Grimes void 938d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 939df8bae1dSRodney W. Grimes { 940f93dfa28SBrooks Davis int i; 941098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 942098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 943df8bae1dSRodney W. Grimes 944c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 945c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 946cfeff1b6SJonathan Lemon if_attach(ifp); 947df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 948c1d93b05SSam Leffler ifp->if_output = ether_output; 949c1d93b05SSam Leffler ifp->if_input = ether_input; 9501158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 951a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 952c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 953322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 954c1d93b05SSam Leffler 9554a0d6638SRuslan Ermilov ifa = ifp->if_addr; 9566e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 95759562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 958df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 959df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 960d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 961c1d93b05SSam Leffler 962797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 963e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 964e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 965e3bbbec2SMatthew N. Dodd 966f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 967f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 968d09ed26fSRuslan Ermilov if (lla[i] != 0) 969f93dfa28SBrooks Davis break; 970f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 971d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 972e1e1452dSArchie Cobbs } 973e1e1452dSArchie Cobbs 97421b8ebd9SArchie Cobbs /* 97521b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 97621b8ebd9SArchie Cobbs */ 97721b8ebd9SArchie Cobbs void 978c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 97921b8ebd9SArchie Cobbs { 980514bcb89SPoul-Henning Kamp if (IFP2AC(ifp)->ac_netgraph != NULL) { 981514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 982514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 98321b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 984514bcb89SPoul-Henning Kamp } 98520a65f37SAndrew Thompson 98621b8ebd9SArchie Cobbs bpfdetach(ifp); 98721b8ebd9SArchie Cobbs if_detach(ifp); 98821b8ebd9SArchie Cobbs } 98921b8ebd9SArchie Cobbs 990ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 991602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 992d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 9938b615593SMarko Zec SYSCTL_V_INT(V_NET, vnet_net, _net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW, 9948b615593SMarko Zec ether_ipfw, 0, "Pass ether pkts through firewall"); 995d7647d96SDag-Erling Smørgrav #endif 99630106f6aSPoul-Henning Kamp 99716b4a343SChristian Weisgerber #if 0 99816b4a343SChristian Weisgerber /* 99916b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 100016b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 100116b4a343SChristian Weisgerber * than the double-loop. 100216b4a343SChristian Weisgerber */ 100316b4a343SChristian Weisgerber uint32_t 100416b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 100516b4a343SChristian Weisgerber { 100616b4a343SChristian Weisgerber size_t i; 100716b4a343SChristian Weisgerber uint32_t crc; 100816b4a343SChristian Weisgerber int bit; 100916b4a343SChristian Weisgerber uint8_t data; 101016b4a343SChristian Weisgerber 101116b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 101216b4a343SChristian Weisgerber 101316b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 1014933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 101516b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 101616b4a343SChristian Weisgerber crc >>= 1; 101716b4a343SChristian Weisgerber if (carry) 101816b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 101916b4a343SChristian Weisgerber } 1020933dad75SAntoine Brodin } 102116b4a343SChristian Weisgerber 102216b4a343SChristian Weisgerber return (crc); 102316b4a343SChristian Weisgerber } 102416b4a343SChristian Weisgerber #else 102516b4a343SChristian Weisgerber uint32_t 102616b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 102716b4a343SChristian Weisgerber { 102816b4a343SChristian Weisgerber static const uint32_t crctab[] = { 102916b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 103016b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 103116b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 103216b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 103316b4a343SChristian Weisgerber }; 103416b4a343SChristian Weisgerber size_t i; 103516b4a343SChristian Weisgerber uint32_t crc; 103616b4a343SChristian Weisgerber 103716b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 103816b4a343SChristian Weisgerber 103916b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 104016b4a343SChristian Weisgerber crc ^= buf[i]; 104116b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 104216b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 104316b4a343SChristian Weisgerber } 104416b4a343SChristian Weisgerber 104516b4a343SChristian Weisgerber return (crc); 104616b4a343SChristian Weisgerber } 104716b4a343SChristian Weisgerber #endif 104816b4a343SChristian Weisgerber 104916b4a343SChristian Weisgerber uint32_t 105016b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 105116b4a343SChristian Weisgerber { 105216b4a343SChristian Weisgerber size_t i; 105316b4a343SChristian Weisgerber uint32_t crc, carry; 105416b4a343SChristian Weisgerber int bit; 105516b4a343SChristian Weisgerber uint8_t data; 105616b4a343SChristian Weisgerber 105716b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 105816b4a343SChristian Weisgerber 105916b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 106016b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 106116b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 106216b4a343SChristian Weisgerber crc <<= 1; 106316b4a343SChristian Weisgerber if (carry) 106416b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 106516b4a343SChristian Weisgerber } 106616b4a343SChristian Weisgerber } 106716b4a343SChristian Weisgerber 106816b4a343SChristian Weisgerber return (crc); 106916b4a343SChristian Weisgerber } 107016b4a343SChristian Weisgerber 1071fb583156SDavid Greenman int 1072995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 107330106f6aSPoul-Henning Kamp { 107430106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 107530106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 1076fb583156SDavid Greenman int error = 0; 107730106f6aSPoul-Henning Kamp 107830106f6aSPoul-Henning Kamp switch (command) { 107930106f6aSPoul-Henning Kamp case SIOCSIFADDR: 108030106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 108130106f6aSPoul-Henning Kamp 108230106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 108330106f6aSPoul-Henning Kamp #ifdef INET 108430106f6aSPoul-Henning Kamp case AF_INET: 108530106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1086322dcb8dSMax Khon arp_ifinit(ifp, ifa); 108730106f6aSPoul-Henning Kamp break; 108830106f6aSPoul-Henning Kamp #endif 108930106f6aSPoul-Henning Kamp #ifdef IPX 109030106f6aSPoul-Henning Kamp /* 109130106f6aSPoul-Henning Kamp * XXX - This code is probably wrong 109230106f6aSPoul-Henning Kamp */ 109330106f6aSPoul-Henning Kamp case AF_IPX: 109430106f6aSPoul-Henning Kamp { 1095098a8c3bSMatthew N. Dodd struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 109630106f6aSPoul-Henning Kamp 109730106f6aSPoul-Henning Kamp if (ipx_nullhost(*ina)) 109830106f6aSPoul-Henning Kamp ina->x_host = 109986101139SPoul-Henning Kamp *(union ipx_host *) 11004a0d6638SRuslan Ermilov IF_LLADDR(ifp); 110130106f6aSPoul-Henning Kamp else { 110230106f6aSPoul-Henning Kamp bcopy((caddr_t) ina->x_host.c_host, 11034a0d6638SRuslan Ermilov (caddr_t) IF_LLADDR(ifp), 1104fc74a9f9SBrooks Davis ETHER_ADDR_LEN); 110530106f6aSPoul-Henning Kamp } 110630106f6aSPoul-Henning Kamp 110730106f6aSPoul-Henning Kamp /* 110830106f6aSPoul-Henning Kamp * Set new address 110930106f6aSPoul-Henning Kamp */ 111030106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 111130106f6aSPoul-Henning Kamp break; 111230106f6aSPoul-Henning Kamp } 111330106f6aSPoul-Henning Kamp #endif 111430106f6aSPoul-Henning Kamp default: 111530106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 111630106f6aSPoul-Henning Kamp break; 111730106f6aSPoul-Henning Kamp } 111830106f6aSPoul-Henning Kamp break; 111930106f6aSPoul-Henning Kamp 112030106f6aSPoul-Henning Kamp case SIOCGIFADDR: 112130106f6aSPoul-Henning Kamp { 112230106f6aSPoul-Henning Kamp struct sockaddr *sa; 112330106f6aSPoul-Henning Kamp 112430106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 11254a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 112630106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 112730106f6aSPoul-Henning Kamp } 112830106f6aSPoul-Henning Kamp break; 1129fb583156SDavid Greenman 1130fb583156SDavid Greenman case SIOCSIFMTU: 1131fb583156SDavid Greenman /* 1132fb583156SDavid Greenman * Set the interface MTU. 1133fb583156SDavid Greenman */ 1134fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1135fb583156SDavid Greenman error = EINVAL; 1136fb583156SDavid Greenman } else { 1137fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 113830106f6aSPoul-Henning Kamp } 1139fb583156SDavid Greenman break; 1140c1d93b05SSam Leffler default: 1141c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1142c1d93b05SSam Leffler break; 1143fb583156SDavid Greenman } 1144fb583156SDavid Greenman return (error); 114530106f6aSPoul-Henning Kamp } 11461158dfb7SGarrett Wollman 114737c84183SPoul-Henning Kamp static int 114872fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 114972fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 11501158dfb7SGarrett Wollman { 11511158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1152d7647d96SDag-Erling Smørgrav #ifdef INET 11531158dfb7SGarrett Wollman struct sockaddr_in *sin; 1154d7647d96SDag-Erling Smørgrav #endif 115582cd038dSYoshinobu Inoue #ifdef INET6 115682cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 115782cd038dSYoshinobu Inoue #endif 11581158dfb7SGarrett Wollman u_char *e_addr; 11591158dfb7SGarrett Wollman 11601158dfb7SGarrett Wollman switch(sa->sa_family) { 11611158dfb7SGarrett Wollman case AF_LINK: 11627f33a738SJulian Elischer /* 11637f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 11647f33a738SJulian Elischer */ 11651158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 11661158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1167086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 11681158dfb7SGarrett Wollman return EADDRNOTAVAIL; 11691158dfb7SGarrett Wollman *llsa = 0; 11701158dfb7SGarrett Wollman return 0; 11711158dfb7SGarrett Wollman 11721158dfb7SGarrett Wollman #ifdef INET 11731158dfb7SGarrett Wollman case AF_INET: 11741158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 11751158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 11761158dfb7SGarrett Wollman return EADDRNOTAVAIL; 11771ede983cSDag-Erling Smørgrav sdl = malloc(sizeof *sdl, M_IFMADDR, 117809df718eSRobert Watson M_NOWAIT|M_ZERO); 117909df718eSRobert Watson if (sdl == NULL) 118009df718eSRobert Watson return ENOMEM; 11811158dfb7SGarrett Wollman sdl->sdl_len = sizeof *sdl; 11821158dfb7SGarrett Wollman sdl->sdl_family = AF_LINK; 11831158dfb7SGarrett Wollman sdl->sdl_index = ifp->if_index; 11841158dfb7SGarrett Wollman sdl->sdl_type = IFT_ETHER; 11851158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 11861158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 11871158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 11881158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 11891158dfb7SGarrett Wollman return 0; 11901158dfb7SGarrett Wollman #endif 119182cd038dSYoshinobu Inoue #ifdef INET6 119282cd038dSYoshinobu Inoue case AF_INET6: 119382cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1194595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1195595b8a1cSJun-ichiro itojun Hagino /* 1196595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1197595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1198595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1199595b8a1cSJun-ichiro itojun Hagino */ 1200595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1201595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1202595b8a1cSJun-ichiro itojun Hagino return 0; 1203595b8a1cSJun-ichiro itojun Hagino } 120482cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 120582cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 12061ede983cSDag-Erling Smørgrav sdl = malloc(sizeof *sdl, M_IFMADDR, 120709df718eSRobert Watson M_NOWAIT|M_ZERO); 120809df718eSRobert Watson if (sdl == NULL) 120909df718eSRobert Watson return (ENOMEM); 121082cd038dSYoshinobu Inoue sdl->sdl_len = sizeof *sdl; 121182cd038dSYoshinobu Inoue sdl->sdl_family = AF_LINK; 121282cd038dSYoshinobu Inoue sdl->sdl_index = ifp->if_index; 121382cd038dSYoshinobu Inoue sdl->sdl_type = IFT_ETHER; 121482cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 121582cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 121682cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 121782cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 121882cd038dSYoshinobu Inoue return 0; 121982cd038dSYoshinobu Inoue #endif 12201158dfb7SGarrett Wollman 12211158dfb7SGarrett Wollman default: 12221158dfb7SGarrett Wollman /* 12231158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 12241158dfb7SGarrett Wollman * that counts... 12251158dfb7SGarrett Wollman */ 12261158dfb7SGarrett Wollman return EAFNOSUPPORT; 12271158dfb7SGarrett Wollman } 12281158dfb7SGarrett Wollman } 122940811c14SMatthew N. Dodd 1230fc74a9f9SBrooks Davis static void* 1231fc74a9f9SBrooks Davis ether_alloc(u_char type, struct ifnet *ifp) 1232fc74a9f9SBrooks Davis { 1233fc74a9f9SBrooks Davis struct arpcom *ac; 1234fc74a9f9SBrooks Davis 1235fc74a9f9SBrooks Davis ac = malloc(sizeof(struct arpcom), M_ARPCOM, M_WAITOK | M_ZERO); 1236fc74a9f9SBrooks Davis ac->ac_ifp = ifp; 1237fc74a9f9SBrooks Davis 1238fc74a9f9SBrooks Davis return (ac); 1239fc74a9f9SBrooks Davis } 1240fc74a9f9SBrooks Davis 1241fc74a9f9SBrooks Davis static void 1242fc74a9f9SBrooks Davis ether_free(void *com, u_char type) 1243fc74a9f9SBrooks Davis { 1244fc74a9f9SBrooks Davis 1245fc74a9f9SBrooks Davis free(com, M_ARPCOM); 1246fc74a9f9SBrooks Davis } 1247fc74a9f9SBrooks Davis 1248fc74a9f9SBrooks Davis static int 1249fc74a9f9SBrooks Davis ether_modevent(module_t mod, int type, void *data) 1250fc74a9f9SBrooks Davis { 1251fc74a9f9SBrooks Davis 1252fc74a9f9SBrooks Davis switch (type) { 1253fc74a9f9SBrooks Davis case MOD_LOAD: 1254fc74a9f9SBrooks Davis if_register_com_alloc(IFT_ETHER, ether_alloc, ether_free); 1255fc74a9f9SBrooks Davis break; 1256fc74a9f9SBrooks Davis case MOD_UNLOAD: 1257fc74a9f9SBrooks Davis if_deregister_com_alloc(IFT_ETHER); 1258fc74a9f9SBrooks Davis break; 1259fc74a9f9SBrooks Davis default: 1260fc74a9f9SBrooks Davis return EOPNOTSUPP; 1261fc74a9f9SBrooks Davis } 1262fc74a9f9SBrooks Davis 1263fc74a9f9SBrooks Davis return (0); 1264fc74a9f9SBrooks Davis } 1265fc74a9f9SBrooks Davis 126640811c14SMatthew N. Dodd static moduledata_t ether_mod = { 126740811c14SMatthew N. Dodd "ether", 1268fc74a9f9SBrooks Davis ether_modevent, 126940811c14SMatthew N. Dodd 0 127040811c14SMatthew N. Dodd }; 127140811c14SMatthew N. Dodd 127252f1277eSChristian S.J. Peron void 127352f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 127452f1277eSChristian S.J. Peron { 127552f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 127652f1277eSChristian S.J. Peron struct mbuf mv, mb; 127752f1277eSChristian S.J. Peron 127852f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 127952f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 128052f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 128152f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 128252f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 128352f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 128452f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 128552f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 128652f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 128752f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 128852f1277eSChristian S.J. Peron /* 128952f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 129052f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 129152f1277eSChristian S.J. Peron * 129252f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 129352f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 129452f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 129552f1277eSChristian S.J. Peron * 129652f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 129752f1277eSChristian S.J. Peron */ 129852f1277eSChristian S.J. Peron if (data != NULL) { 129952f1277eSChristian S.J. Peron mv.m_next = m; 130052f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 130152f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 130252f1277eSChristian S.J. Peron mb.m_next = &mv; 130352f1277eSChristian S.J. Peron mb.m_data = data; 130452f1277eSChristian S.J. Peron mb.m_len = dlen; 130552f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 130652f1277eSChristian S.J. Peron } else 130752f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 130852f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 130952f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 131052f1277eSChristian S.J. Peron } 131152f1277eSChristian S.J. Peron 131260e87ca8SAndrew Thompson struct mbuf * 1313a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 131460e87ca8SAndrew Thompson { 131560e87ca8SAndrew Thompson struct ether_vlan_header *evl; 131660e87ca8SAndrew Thompson 131760e87ca8SAndrew Thompson M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_DONTWAIT); 131860e87ca8SAndrew Thompson if (m == NULL) 131960e87ca8SAndrew Thompson return (NULL); 132060e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 132160e87ca8SAndrew Thompson 132260e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 132360e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 132460e87ca8SAndrew Thompson if (m == NULL) 132560e87ca8SAndrew Thompson return (NULL); 132660e87ca8SAndrew Thompson } 132760e87ca8SAndrew Thompson 132860e87ca8SAndrew Thompson /* 132960e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 133060e87ca8SAndrew Thompson * with 802.1Q encapsulation. 133160e87ca8SAndrew Thompson */ 133260e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 133360e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 133460e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 133560e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 133660e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 133760e87ca8SAndrew Thompson return (m); 133860e87ca8SAndrew Thompson } 133960e87ca8SAndrew Thompson 1340fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 134140811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1342