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> 48df8bae1dSRodney W. Grimes #include <sys/socket.h> 4951a53488SBruce Evans #include <sys/sockio.h> 50602d513cSGarrett Wollman #include <sys/sysctl.h> 51df8bae1dSRodney W. Grimes 52df8bae1dSRodney W. Grimes #include <net/if.h> 53d7647d96SDag-Erling Smørgrav #include <net/if_arp.h> 54df8bae1dSRodney W. Grimes #include <net/netisr.h> 55df8bae1dSRodney W. Grimes #include <net/route.h> 56df8bae1dSRodney W. Grimes #include <net/if_llc.h> 57df8bae1dSRodney W. Grimes #include <net/if_dl.h> 58df8bae1dSRodney W. Grimes #include <net/if_types.h> 592e2de7f2SArchie Cobbs #include <net/bpf.h> 60e1e1452dSArchie Cobbs #include <net/ethernet.h> 61fd6238a6SAndrew Thompson #include <net/if_bridgevar.h> 62c1d93b05SSam Leffler #include <net/if_vlan_var.h> 636e6b3f7cSQing Li #include <net/if_llatbl.h> 6460ee3847SMax Laier #include <net/pf_mtag.h> 657d4317bdSAlexander V. Chernikov #include <net/pfil.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> 741d5e9e22SEivind Eklund #endif 7582cd038dSYoshinobu Inoue #ifdef INET6 7682cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 7782cd038dSYoshinobu Inoue #endif 78df8bae1dSRodney W. Grimes 79cc6a66f2SJulian Elischer #ifdef IPX 80cc6a66f2SJulian Elischer #include <netipx/ipx.h> 81cc6a66f2SJulian Elischer #include <netipx/ipx_if.h> 82a1026028SMaxim Sobolev #endif 836e6b3f7cSQing Li 844f93599fSBoris Popov int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m); 855accfb8cSBoris Popov int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp, 862a7e8eceSBoris Popov struct sockaddr *dst, short *tp, int *hlen); 87cc6a66f2SJulian Elischer 88655929bfSJulian Elischer #ifdef NETATALK 89655929bfSJulian Elischer #include <netatalk/at.h> 90655929bfSJulian Elischer #include <netatalk/at_var.h> 91655929bfSJulian Elischer #include <netatalk/at_extern.h> 92655929bfSJulian Elischer 93655929bfSJulian Elischer #define llc_snap_org_code llc_un.type_snap.org_code 94655929bfSJulian Elischer #define llc_snap_ether_type llc_un.type_snap.ether_type 95655929bfSJulian Elischer 96655929bfSJulian Elischer extern u_char at_org_code[3]; 97655929bfSJulian Elischer extern u_char aarp_org_code[3]; 982cc2df49SGarrett Wollman #endif /* NETATALK */ 992cc2df49SGarrett Wollman 100aed55708SRobert Watson #include <security/mac/mac_framework.h> 101aed55708SRobert Watson 102d54d93acSEd Maste #ifdef CTASSERT 103d54d93acSEd Maste CTASSERT(sizeof (struct ether_header) == ETHER_ADDR_LEN * 2 + 2); 104d54d93acSEd Maste CTASSERT(sizeof (struct ether_addr) == ETHER_ADDR_LEN); 105d54d93acSEd Maste #endif 106d54d93acSEd Maste 1077d4317bdSAlexander V. Chernikov VNET_DEFINE(struct pfil_head, link_pfil_hook); /* Packet filter hooks */ 1087d4317bdSAlexander V. Chernikov 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 */ 137d745c852SEd Schouten static 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 144df8bae1dSRodney W. Grimes /* 145df8bae1dSRodney W. Grimes * Ethernet output routine. 146df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 147df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 148df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 149df8bae1dSRodney W. Grimes */ 150df8bae1dSRodney W. Grimes int 15172fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 152279aa3d4SKip Macy struct sockaddr *dst, struct route *ro) 153df8bae1dSRodney W. Grimes { 154df8bae1dSRodney W. Grimes short type; 155279aa3d4SKip Macy int error = 0, hdrcmplt = 0; 15664760eb0SWarner Losh u_char esrc[ETHER_ADDR_LEN], edst[ETHER_ADDR_LEN]; 1576e6b3f7cSQing Li struct llentry *lle = NULL; 158279aa3d4SKip Macy struct rtentry *rt0 = NULL; 159098a8c3bSMatthew N. Dodd struct ether_header *eh; 16060ee3847SMax Laier struct pf_mtag *t; 161c54c76ccSOleg Bulyzhin int loop_copy = 1; 162d32864c3SRobert Watson int hlen; /* link layer header length */ 163df8bae1dSRodney W. Grimes 164279aa3d4SKip Macy if (ro != NULL) { 1659fca4f79SQing Li if (!(m->m_flags & (M_BCAST | M_MCAST))) 166279aa3d4SKip Macy lle = ro->ro_lle; 167279aa3d4SKip Macy rt0 = ro->ro_rt; 168279aa3d4SKip Macy } 16943b29369SRobert Watson #ifdef MAC 17030d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 17143b29369SRobert Watson if (error) 17243b29369SRobert Watson senderr(error); 17343b29369SRobert Watson #endif 17443b29369SRobert Watson 1756eeac1d9SJulian Elischer M_PROFILE(m); 176afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 177afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 17813f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 17913f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 180df8bae1dSRodney W. Grimes senderr(ENETDOWN); 1817f760c48SMatthew N. Dodd 18284dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 183df8bae1dSRodney W. Grimes switch (dst->sa_family) { 184df8bae1dSRodney W. Grimes #ifdef INET 185df8bae1dSRodney W. Grimes case AF_INET: 186279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 187279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 188279aa3d4SKip Macy else 1896e6b3f7cSQing Li error = arpresolve(ifp, rt0, m, dst, edst, &lle); 190cd46a114SLuigi Rizzo if (error) 191cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 19234bed8b0SDavid Greenman type = htons(ETHERTYPE_IP); 193df8bae1dSRodney W. Grimes break; 19443a6c75aSMatthew N. Dodd case AF_ARP: 19543a6c75aSMatthew N. Dodd { 19643a6c75aSMatthew N. Dodd struct arphdr *ah; 19743a6c75aSMatthew N. Dodd ah = mtod(m, struct arphdr *); 19843a6c75aSMatthew N. Dodd ah->ar_hrd = htons(ARPHRD_ETHER); 19943a6c75aSMatthew N. Dodd 200c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 20143a6c75aSMatthew N. Dodd 20243a6c75aSMatthew N. Dodd switch(ntohs(ah->ar_op)) { 20343a6c75aSMatthew N. Dodd case ARPOP_REVREQUEST: 20443a6c75aSMatthew N. Dodd case ARPOP_REVREPLY: 20543a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_REVARP); 20643a6c75aSMatthew N. Dodd break; 20743a6c75aSMatthew N. Dodd case ARPOP_REQUEST: 20843a6c75aSMatthew N. Dodd case ARPOP_REPLY: 20943a6c75aSMatthew N. Dodd default: 21043a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_ARP); 21143a6c75aSMatthew N. Dodd break; 21243a6c75aSMatthew N. Dodd } 21343a6c75aSMatthew N. Dodd 21443a6c75aSMatthew N. Dodd if (m->m_flags & M_BCAST) 21543a6c75aSMatthew N. Dodd bcopy(ifp->if_broadcastaddr, edst, ETHER_ADDR_LEN); 21643a6c75aSMatthew N. Dodd else 21743a6c75aSMatthew N. Dodd bcopy(ar_tha(ah), edst, ETHER_ADDR_LEN); 21843a6c75aSMatthew N. Dodd 21943a6c75aSMatthew N. Dodd } 22043a6c75aSMatthew N. Dodd break; 221df8bae1dSRodney W. Grimes #endif 22282cd038dSYoshinobu Inoue #ifdef INET6 22382cd038dSYoshinobu Inoue case AF_INET6: 224279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 225279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 226279aa3d4SKip Macy else 2279928dafbSQing Li error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle); 228cd46a114SLuigi Rizzo if (error) 229cd46a114SLuigi Rizzo return error; 23082cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 23182cd038dSYoshinobu Inoue break; 23282cd038dSYoshinobu Inoue #endif 233cc6a66f2SJulian Elischer #ifdef IPX 234cc6a66f2SJulian Elischer case AF_IPX: 2354f93599fSBoris Popov if (ef_outputp) { 2362a7e8eceSBoris Popov error = ef_outputp(ifp, &m, dst, &type, &hlen); 2375accfb8cSBoris Popov if (error) 2385accfb8cSBoris Popov goto bad; 2394f93599fSBoris Popov } else 24034bed8b0SDavid Greenman type = htons(ETHERTYPE_IPX); 241cc6a66f2SJulian Elischer bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 242cc6a66f2SJulian Elischer (caddr_t)edst, sizeof (edst)); 243cc6a66f2SJulian Elischer break; 244cc6a66f2SJulian Elischer #endif 245655929bfSJulian Elischer #ifdef NETATALK 246655929bfSJulian Elischer case AF_APPLETALK: 2471d0eab59SJulian Elischer { 248ed7509acSJulian Elischer struct at_ifaddr *aa; 2491d0eab59SJulian Elischer 250cd46a114SLuigi Rizzo if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) 251cd46a114SLuigi Rizzo senderr(EHOSTUNREACH); /* XXX */ 2526c7ffe93SRobert Watson if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 2536c7ffe93SRobert Watson ifa_free(&aa->aa_ifa); 2541d0eab59SJulian Elischer return (0); 2556c7ffe93SRobert Watson } 256655929bfSJulian Elischer /* 257ed7509acSJulian Elischer * In the phase 2 case, need to prepend an mbuf for the llc header. 258655929bfSJulian Elischer */ 259655929bfSJulian Elischer if ( aa->aa_flags & AFA_PHASE2 ) { 260655929bfSJulian Elischer struct llc llc; 261655929bfSJulian Elischer 2626c7ffe93SRobert Watson ifa_free(&aa->aa_ifa); 2637e2041e0SRobert Watson M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); 2642166ffe8SRobert Watson if (m == NULL) 2652166ffe8SRobert Watson senderr(ENOBUFS); 266655929bfSJulian Elischer llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 267655929bfSJulian Elischer llc.llc_control = LLC_UI; 268655929bfSJulian Elischer bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 269655929bfSJulian Elischer llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 270797f247bSMatthew N. Dodd bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 27134bed8b0SDavid Greenman type = htons(m->m_pkthdr.len); 272797f247bSMatthew N. Dodd hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN; 273655929bfSJulian Elischer } else { 2746c7ffe93SRobert Watson ifa_free(&aa->aa_ifa); 27534bed8b0SDavid Greenman type = htons(ETHERTYPE_AT); 276655929bfSJulian Elischer } 277655929bfSJulian Elischer break; 278ed7509acSJulian Elischer } 2798cdfefbdSPeter Wemm #endif /* NETATALK */ 280df8bae1dSRodney W. Grimes 281114ae644SMike Smith case pseudo_AF_HDRCMPLT: 282114ae644SMike Smith hdrcmplt = 1; 283114ae644SMike Smith eh = (struct ether_header *)dst->sa_data; 284114ae644SMike Smith (void)memcpy(esrc, eh->ether_shost, sizeof (esrc)); 285114ae644SMike Smith /* FALLTHROUGH */ 286114ae644SMike Smith 287df8bae1dSRodney W. Grimes case AF_UNSPEC: 288c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 289df8bae1dSRodney W. Grimes eh = (struct ether_header *)dst->sa_data; 29094a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 291df8bae1dSRodney W. Grimes type = eh->ether_type; 292df8bae1dSRodney W. Grimes break; 293df8bae1dSRodney W. Grimes 294df8bae1dSRodney W. Grimes default: 29529e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 296df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 297df8bae1dSRodney W. Grimes } 298df8bae1dSRodney W. Grimes 2996e6b3f7cSQing Li if (lle != NULL && (lle->la_flags & LLE_IFADDR)) { 3006e6b3f7cSQing Li int csum_flags = 0; 3016e6b3f7cSQing Li if (m->m_pkthdr.csum_flags & CSUM_IP) 3026e6b3f7cSQing Li csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 3036e6b3f7cSQing Li if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 3046e6b3f7cSQing Li csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 3052f4afd21SRandall Stewart if (m->m_pkthdr.csum_flags & CSUM_SCTP) 3062f4afd21SRandall Stewart csum_flags |= CSUM_SCTP_VALID; 3076e6b3f7cSQing Li m->m_pkthdr.csum_flags |= csum_flags; 3086e6b3f7cSQing Li m->m_pkthdr.csum_data = 0xffff; 3096e6b3f7cSQing Li return (if_simloop(ifp, m, dst->sa_family, 0)); 3106e6b3f7cSQing Li } 3116e6b3f7cSQing Li 312df8bae1dSRodney W. Grimes /* 313df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 314df8bae1dSRodney W. Grimes * allocate another. 315df8bae1dSRodney W. Grimes */ 316797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 3172166ffe8SRobert Watson if (m == NULL) 318df8bae1dSRodney W. Grimes senderr(ENOBUFS); 319df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 32094a5d9b6SDavid Greenman (void)memcpy(&eh->ether_type, &type, 321df8bae1dSRodney W. Grimes sizeof(eh->ether_type)); 32294a5d9b6SDavid Greenman (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); 323114ae644SMike Smith if (hdrcmplt) 324114ae644SMike Smith (void)memcpy(eh->ether_shost, esrc, 325114ae644SMike Smith sizeof(eh->ether_shost)); 326114ae644SMike Smith else 3274a0d6638SRuslan Ermilov (void)memcpy(eh->ether_shost, IF_LLADDR(ifp), 328df8bae1dSRodney W. Grimes sizeof(eh->ether_shost)); 329ed7509acSJulian Elischer 330ed7509acSJulian Elischer /* 331ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 332ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 333ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 334ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 335ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 336ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 337ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 338ed7509acSJulian Elischer */ 339c54c76ccSOleg Bulyzhin if ((ifp->if_flags & IFF_SIMPLEX) && loop_copy && 34060ee3847SMax Laier ((t = pf_find_mtag(m)) == NULL || !t->routed)) { 3413cd67511SJesper Skriver int csum_flags = 0; 3423cd67511SJesper Skriver 3433cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_IP) 3443cd67511SJesper Skriver csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 3453cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 3463cd67511SJesper Skriver csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 3472f4afd21SRandall Stewart if (m->m_pkthdr.csum_flags & CSUM_SCTP) 3482f4afd21SRandall Stewart csum_flags |= CSUM_SCTP_VALID; 34906f684b0SMatthew N. Dodd 350c54c76ccSOleg Bulyzhin if (m->m_flags & M_BCAST) { 35106f684b0SMatthew N. Dodd struct mbuf *n; 352ed7509acSJulian Elischer 353294dd290SLuigi Rizzo /* 354294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 355294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 356294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 357294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 358294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 359294dd290SLuigi Rizzo * extra data copying vs. extra locking). 3609983b3c0SYaroslav Tykhiy * 3619983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 3629983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 3639983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 364294dd290SLuigi Rizzo */ 365294dd290SLuigi Rizzo if ((n = m_dup(m, M_DONTWAIT)) != NULL) { 3663cd67511SJesper Skriver n->m_pkthdr.csum_flags |= csum_flags; 3673cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3683cd67511SJesper Skriver n->m_pkthdr.csum_data = 0xffff; 36906a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 370c1404dc0SArchie Cobbs } else 371c1404dc0SArchie Cobbs ifp->if_iqdrops++; 37206f684b0SMatthew N. Dodd } else if (bcmp(eh->ether_dhost, eh->ether_shost, 37306f684b0SMatthew N. Dodd ETHER_ADDR_LEN) == 0) { 3743cd67511SJesper Skriver m->m_pkthdr.csum_flags |= csum_flags; 3753cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3763cd67511SJesper Skriver m->m_pkthdr.csum_data = 0xffff; 37706a429a3SArchie Cobbs (void) if_simloop(ifp, m, dst->sa_family, hlen); 378ed7509acSJulian Elischer return (0); /* XXX */ 379ed7509acSJulian Elischer } 380ed7509acSJulian Elischer } 3812e2de7f2SArchie Cobbs 3823f7d1396SAndrew Thompson /* 3833f7d1396SAndrew Thompson * Bridges require special output handling. 3843f7d1396SAndrew Thompson */ 3853f7d1396SAndrew Thompson if (ifp->if_bridge) { 3863f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 3873f7d1396SAndrew Thompson return (error); 3883f7d1396SAndrew Thompson } 3893f7d1396SAndrew Thompson 390259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 391a9771948SGleb Smirnoff if (ifp->if_carp && 39208b68b0eSGleb Smirnoff (error = (*carp_output_p)(ifp, m, dst))) 393a9771948SGleb Smirnoff goto bad; 394a9771948SGleb Smirnoff #endif 395a9771948SGleb Smirnoff 396e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 397eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 398514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 399514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 400e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 401e1e1452dSArchie Cobbs bad: if (m != NULL) 402e1e1452dSArchie Cobbs m_freem(m); 403e1e1452dSArchie Cobbs return (error); 404e1e1452dSArchie Cobbs } 405e1e1452dSArchie Cobbs if (m == NULL) 406e1e1452dSArchie Cobbs return (0); 407e1e1452dSArchie Cobbs } 408e1e1452dSArchie Cobbs 409e1e1452dSArchie Cobbs /* Continue with link-layer output */ 410e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 411e1e1452dSArchie Cobbs } 412e1e1452dSArchie Cobbs 413e1e1452dSArchie Cobbs /* 414e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 415e1e1452dSArchie Cobbs * 416e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 417e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 418e1e1452dSArchie Cobbs */ 419e1e1452dSArchie Cobbs int 420c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 421e1e1452dSArchie Cobbs { 4227d4317bdSAlexander V. Chernikov int i; 4232b25acc1SLuigi Rizzo 4247d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook)) { 4257d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_OUT, NULL); 4267d4317bdSAlexander V. Chernikov 4277d4317bdSAlexander V. Chernikov if (i != 0) 4287d4317bdSAlexander V. Chernikov return (EACCES); 4297d4317bdSAlexander V. Chernikov 4307d4317bdSAlexander V. Chernikov if (m == NULL) 4317d4317bdSAlexander V. Chernikov return (0); 4324b984093SLuigi Rizzo } 4332b25acc1SLuigi Rizzo 434df8bae1dSRodney W. Grimes /* 435df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 436df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 437df8bae1dSRodney W. Grimes */ 438aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 439df8bae1dSRodney W. Grimes } 440df8bae1dSRodney W. Grimes 441d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 442d7647d96SDag-Erling Smørgrav #endif 4434b984093SLuigi Rizzo 4444b984093SLuigi Rizzo /* 445c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 446c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 447df8bae1dSRodney W. Grimes */ 448c1d93b05SSam Leffler static void 4496cb52192SRobert Watson ether_input_internal(struct ifnet *ifp, struct mbuf *m) 450df8bae1dSRodney W. Grimes { 451c1d93b05SSam Leffler struct ether_header *eh; 452c1d93b05SSam Leffler u_short etype; 453df8bae1dSRodney W. Grimes 45469462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 45569462a82SBruce M Simpson m_freem(m); 45669462a82SBruce M Simpson return; 45769462a82SBruce M Simpson } 45869462a82SBruce M Simpson #ifdef DIAGNOSTIC 45969462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 46069462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 46169462a82SBruce M Simpson m_freem(m); 46269462a82SBruce M Simpson return; 46369462a82SBruce M Simpson } 46469462a82SBruce M Simpson #endif 465c1d93b05SSam Leffler /* 466c1d93b05SSam Leffler * Do consistency checks to verify assumptions 467c1d93b05SSam Leffler * made by code past this point. 468c1d93b05SSam Leffler */ 469c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 470c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 471c1d93b05SSam Leffler ifp->if_ierrors++; 472c939f1aeSLuigi Rizzo m_freem(m); 473c939f1aeSLuigi Rizzo return; 474c939f1aeSLuigi Rizzo } 475797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 476c1d93b05SSam Leffler /* XXX maybe should pullup? */ 477c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 478c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 479c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 480c1d93b05SSam Leffler ifp->if_ierrors++; 481c1d93b05SSam Leffler m_freem(m); 482c1d93b05SSam Leffler return; 4832e2de7f2SArchie Cobbs } 484c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 485c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 486c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 487c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 488c1d93b05SSam Leffler ifp->if_ierrors++; 489c1d93b05SSam Leffler m_freem(m); 490c1d93b05SSam Leffler return; 491c1d93b05SSam Leffler } 492c1d93b05SSam Leffler #ifdef DIAGNOSTIC 493c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 4949bf40edeSBrooks Davis if_printf(ifp, "Warning, frame marked as received on %s\n", 4959bf40edeSBrooks Davis m->m_pkthdr.rcvif->if_xname); 496c1d93b05SSam Leffler } 497c1d93b05SSam Leffler #endif 498c1d93b05SSam Leffler 49921ca7b57SMarko Zec CURVNET_SET_QUIET(ifp->if_vnet); 50021ca7b57SMarko Zec 50169462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 50269462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 50369462a82SBruce M Simpson m->m_flags |= M_BCAST; 50469462a82SBruce M Simpson else 50569462a82SBruce M Simpson m->m_flags |= M_MCAST; 50669462a82SBruce M Simpson ifp->if_imcasts++; 50769462a82SBruce M Simpson } 50869462a82SBruce M Simpson 509533d8562SRobert Watson #ifdef MAC 510533d8562SRobert Watson /* 511533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 512533d8562SRobert Watson * consumers can get to it. 513533d8562SRobert Watson */ 51430d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 515533d8562SRobert Watson #endif 516533d8562SRobert Watson 517c1d93b05SSam Leffler /* 51869462a82SBruce M Simpson * Give bpf a chance at the packet. 519c1d93b05SSam Leffler */ 520d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 5212e2de7f2SArchie Cobbs 52269462a82SBruce M Simpson /* 52369462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 52469462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 52569462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 52669462a82SBruce M Simpson */ 527c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 528c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 529c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 530c1d93b05SSam Leffler } 531c1d93b05SSam Leffler 532c1d93b05SSam Leffler ifp->if_ibytes += m->m_pkthdr.len; 53305463bb5SDavid Greenman 53469462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 535de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 536de572b37SChristian S.J. Peron m_freem(m); 53721ca7b57SMarko Zec CURVNET_RESTORE(); 538de572b37SChristian S.J. Peron return; 539de572b37SChristian S.J. Peron } 540de572b37SChristian S.J. Peron 54118242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 542b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 54318242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 54418242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 54518242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 546b47888ceSAndrew Thompson if (m != NULL) 547b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 5482db13e75SMarko Zec else { 5492db13e75SMarko Zec CURVNET_RESTORE(); 550b47888ceSAndrew Thompson return; 551b47888ceSAndrew Thompson } 5522db13e75SMarko Zec } 553b47888ceSAndrew Thompson 55469462a82SBruce M Simpson /* 55569462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 55669462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 55769462a82SBruce M Simpson * path correctly. 55869462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 55969462a82SBruce M Simpson */ 56069462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 56169462a82SBruce M Simpson struct ether_vlan_header *evl; 56269462a82SBruce M Simpson 56369462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 56469462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 565402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 56669462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 567402d5e27SBruce M Simpson #endif 56869462a82SBruce M Simpson ifp->if_ierrors++; 56969462a82SBruce M Simpson m_freem(m); 5702db13e75SMarko Zec CURVNET_RESTORE(); 57169462a82SBruce M Simpson return; 57269462a82SBruce M Simpson } 57369462a82SBruce M Simpson 57469462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 57569462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 57669462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 57769462a82SBruce M Simpson 57869462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 57969462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 58069462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 58197cce87fSGleb Smirnoff eh = mtod(m, struct ether_header *); 58269462a82SBruce M Simpson } 58369462a82SBruce M Simpson 584a34c6aebSBjoern A. Zeeb M_SETFIB(m, ifp->if_fib); 585a34c6aebSBjoern A. Zeeb 58669462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 587eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 588514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 58969462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 59069462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 591c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 59221ca7b57SMarko Zec if (m == NULL) { 59321ca7b57SMarko Zec CURVNET_RESTORE(); 594e1e1452dSArchie Cobbs return; 595e1e1452dSArchie Cobbs } 59621ca7b57SMarko Zec } 597e1e1452dSArchie Cobbs 5988f867517SAndrew Thompson /* 59969462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 60069462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 60169462a82SBruce M Simpson * and the frame should be delivered locally. 6028f867517SAndrew Thompson */ 60369462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 60469462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 605fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 60621ca7b57SMarko Zec if (m == NULL) { 60721ca7b57SMarko Zec CURVNET_RESTORE(); 6088f867517SAndrew Thompson return; 6098f867517SAndrew Thompson } 61021ca7b57SMarko Zec } 6118f867517SAndrew Thompson 612259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 61369462a82SBruce M Simpson /* 61469462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 61569462a82SBruce M Simpson * mbuf flows up to Layer 3. 61669462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 61769462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 61869462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 61969462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 62069462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 62169462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 62269462a82SBruce M Simpson */ 62354bfbd51SWill Andrews if (ifp->if_carp && (*carp_forus_p)(ifp, eh->ether_dhost)) { 62469462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 62569462a82SBruce M Simpson } else 62669462a82SBruce M Simpson #endif 62769462a82SBruce M Simpson { 62869462a82SBruce M Simpson /* 629e7f8c833SBruce M Simpson * If the frame received was not for our MAC address, set the 63069462a82SBruce M Simpson * M_PROMISC flag on the mbuf chain. The frame may need to 63169462a82SBruce M Simpson * be seen by the rest of the Ethernet input path in case of 63269462a82SBruce M Simpson * re-entry (e.g. bridge, vlan, netgraph) but should not be 63369462a82SBruce M Simpson * seen by upper protocol layers. 63469462a82SBruce M Simpson */ 63569462a82SBruce M Simpson if (!ETHER_IS_MULTICAST(eh->ether_dhost) && 636e7f8c833SBruce M Simpson bcmp(IF_LLADDR(ifp), eh->ether_dhost, ETHER_ADDR_LEN) != 0) 63769462a82SBruce M Simpson m->m_flags |= M_PROMISC; 63869462a82SBruce M Simpson } 63969462a82SBruce M Simpson 640a6ddbff0SPoul-Henning Kamp /* First chunk of an mbuf contains good entropy */ 64110b1fde0SMark Murray if (harvest.ethernet) 64210b1fde0SMark Murray random_harvest(m, 16, 3, 0, RANDOM_NET); 64369462a82SBruce M Simpson 644acf032f5SRobert Watson ether_demux(ifp, m); 64521ca7b57SMarko Zec CURVNET_RESTORE(); 646e1e1452dSArchie Cobbs } 647e1e1452dSArchie Cobbs 648e1e1452dSArchie Cobbs /* 6496cb52192SRobert Watson * Ethernet input dispatch; by default, direct dispatch here regardless of 6506cb52192SRobert Watson * global configuration. 6516cb52192SRobert Watson */ 6526cb52192SRobert Watson static void 6536cb52192SRobert Watson ether_nh_input(struct mbuf *m) 6546cb52192SRobert Watson { 6556cb52192SRobert Watson 6566cb52192SRobert Watson ether_input_internal(m->m_pkthdr.rcvif, m); 6576cb52192SRobert Watson } 6586cb52192SRobert Watson 6596cb52192SRobert Watson static struct netisr_handler ether_nh = { 6606cb52192SRobert Watson .nh_name = "ether", 6616cb52192SRobert Watson .nh_handler = ether_nh_input, 6626cb52192SRobert Watson .nh_proto = NETISR_ETHER, 6636cb52192SRobert Watson .nh_policy = NETISR_POLICY_SOURCE, 6646cb52192SRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 6656cb52192SRobert Watson }; 6666cb52192SRobert Watson 6676cb52192SRobert Watson static void 6686cb52192SRobert Watson ether_init(__unused void *arg) 6696cb52192SRobert Watson { 6706cb52192SRobert Watson 6716cb52192SRobert Watson netisr_register(ðer_nh); 6726cb52192SRobert Watson } 6736cb52192SRobert Watson SYSINIT(ether, SI_SUB_INIT_IF, SI_ORDER_ANY, ether_init, NULL); 6746cb52192SRobert Watson 6756cb52192SRobert Watson static void 6767d4317bdSAlexander V. Chernikov vnet_ether_init(__unused void *arg) 6777d4317bdSAlexander V. Chernikov { 6787d4317bdSAlexander V. Chernikov int i; 6797d4317bdSAlexander V. Chernikov 6807d4317bdSAlexander V. Chernikov /* Initialize packet filter hooks. */ 6817d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_type = PFIL_TYPE_AF; 6827d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_af = AF_LINK; 6837d4317bdSAlexander V. Chernikov if ((i = pfil_head_register(&V_link_pfil_hook)) != 0) 6847d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to register pfil link hook, " 6857d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 6867d4317bdSAlexander V. Chernikov } 6877d4317bdSAlexander V. Chernikov VNET_SYSINIT(vnet_ether_init, SI_SUB_PROTO_IF, SI_ORDER_ANY, 6887d4317bdSAlexander V. Chernikov vnet_ether_init, NULL); 6897d4317bdSAlexander V. Chernikov 6907d4317bdSAlexander V. Chernikov static void 6917d4317bdSAlexander V. Chernikov vnet_ether_destroy(__unused void *arg) 6927d4317bdSAlexander V. Chernikov { 6937d4317bdSAlexander V. Chernikov int i; 6947d4317bdSAlexander V. Chernikov 6957d4317bdSAlexander V. Chernikov if ((i = pfil_head_unregister(&V_link_pfil_hook)) != 0) 6967d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to unregister pfil link hook, " 6977d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 6987d4317bdSAlexander V. Chernikov } 6997d4317bdSAlexander V. Chernikov VNET_SYSUNINIT(vnet_ether_uninit, SI_SUB_PROTO_IF, SI_ORDER_ANY, 7007d4317bdSAlexander V. Chernikov vnet_ether_destroy, NULL); 7017d4317bdSAlexander V. Chernikov 7027d4317bdSAlexander V. Chernikov 7037d4317bdSAlexander V. Chernikov 7047d4317bdSAlexander V. Chernikov static void 7056cb52192SRobert Watson ether_input(struct ifnet *ifp, struct mbuf *m) 7066cb52192SRobert Watson { 7076cb52192SRobert Watson 7086cb52192SRobert Watson /* 7096cb52192SRobert Watson * We will rely on rcvif being set properly in the deferred context, 7106cb52192SRobert Watson * so assert it is correct here. 7116cb52192SRobert Watson */ 7126cb52192SRobert Watson KASSERT(m->m_pkthdr.rcvif == ifp, ("%s: ifnet mismatch", __func__)); 7136cb52192SRobert Watson 7146cb52192SRobert Watson netisr_dispatch(NETISR_ETHER, m); 7156cb52192SRobert Watson } 7166cb52192SRobert Watson 7176cb52192SRobert Watson /* 718e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 719e1e1452dSArchie Cobbs */ 720e1e1452dSArchie Cobbs void 721c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 722e1e1452dSArchie Cobbs { 723c1d93b05SSam Leffler struct ether_header *eh; 7247d4317bdSAlexander V. Chernikov int i, isr; 725e1e1452dSArchie Cobbs u_short ether_type; 726e1e1452dSArchie Cobbs #if defined(NETATALK) 727098a8c3bSMatthew N. Dodd struct llc *l; 728e1e1452dSArchie Cobbs #endif 72969462a82SBruce M Simpson 73069462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 73169462a82SBruce M Simpson 7327d4317bdSAlexander V. Chernikov /* Do not grab PROMISC frames in case we are re-entered. */ 7337d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook) && !(m->m_flags & M_PROMISC)) { 7347d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_IN, NULL); 7357d4317bdSAlexander V. Chernikov 7367d4317bdSAlexander V. Chernikov if (i != 0 || m == NULL) 7377d4317bdSAlexander V. Chernikov return; 73869462a82SBruce M Simpson } 7397d4317bdSAlexander V. Chernikov 740c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 741cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 742c1d93b05SSam Leffler 743a9771948SGleb Smirnoff /* 74469462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 74569462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 746a9771948SGleb Smirnoff */ 74769462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 74869462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 74975ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 7506c23e6ccSRuslan Ermilov ifp->if_noproto++; 7516c23e6ccSRuslan Ermilov m_freem(m); 7526c23e6ccSRuslan Ermilov return; 7536c23e6ccSRuslan Ermilov } 75469462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 75569462a82SBruce M Simpson __func__)); 75669462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 75769462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 758c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 759c1d93b05SSam Leffler return; 760c1d93b05SSam Leffler } 761c1d93b05SSam Leffler 762c1d93b05SSam Leffler /* 76369462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 76469462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 765c1d93b05SSam Leffler */ 76669462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 767c1d93b05SSam Leffler m_freem(m); 768c1d93b05SSam Leffler return; 769c1d93b05SSam Leffler } 770c1d93b05SSam Leffler 77169462a82SBruce M Simpson /* 77269462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 77369462a82SBruce M Simpson * Strip off Ethernet header. 77469462a82SBruce M Simpson */ 77569462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 77669462a82SBruce M Simpson m->m_flags &= ~(M_PROTOFLAGS); 777797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 778c1d93b05SSam Leffler 77969462a82SBruce M Simpson /* 78069462a82SBruce M Simpson * Dispatch frame to upper layer. 78169462a82SBruce M Simpson */ 782307d80beSDavid Greenman switch (ether_type) { 783df8bae1dSRodney W. Grimes #ifdef INET 784df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 7855d691e6dSAndre Oppermann if ((m = ip_fastforward(m)) == NULL) 7861f91d8c5SDavid Greenman return; 7871cafed39SJonathan Lemon isr = NETISR_IP; 788df8bae1dSRodney W. Grimes break; 789df8bae1dSRodney W. Grimes 790df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 79108aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 79208aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 79308aadfbbSJonathan Lemon m_freem(m); 79408aadfbbSJonathan Lemon return; 79508aadfbbSJonathan Lemon } 7961cafed39SJonathan Lemon isr = NETISR_ARP; 797df8bae1dSRodney W. Grimes break; 798df8bae1dSRodney W. Grimes #endif 799cc6a66f2SJulian Elischer #ifdef IPX 800cc6a66f2SJulian Elischer case ETHERTYPE_IPX: 8014f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 8024f93599fSBoris Popov return; 8031cafed39SJonathan Lemon isr = NETISR_IPX; 804cc6a66f2SJulian Elischer break; 805cc6a66f2SJulian Elischer #endif 80682cd038dSYoshinobu Inoue #ifdef INET6 80782cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 8081cafed39SJonathan Lemon isr = NETISR_IPV6; 80982cd038dSYoshinobu Inoue break; 81082cd038dSYoshinobu Inoue #endif 811655929bfSJulian Elischer #ifdef NETATALK 812655929bfSJulian Elischer case ETHERTYPE_AT: 8131cafed39SJonathan Lemon isr = NETISR_ATALK1; 814655929bfSJulian Elischer break; 815655929bfSJulian Elischer case ETHERTYPE_AARP: 8161cafed39SJonathan Lemon isr = NETISR_AARP; 8171cafed39SJonathan Lemon break; 8188cdfefbdSPeter Wemm #endif /* NETATALK */ 819df8bae1dSRodney W. Grimes default: 8204f93599fSBoris Popov #ifdef IPX 8214f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 8224f93599fSBoris Popov return; 8234f93599fSBoris Popov #endif /* IPX */ 824242c5536SPeter Wemm #if defined(NETATALK) 825307d80beSDavid Greenman if (ether_type > ETHERMTU) 826c1d93b05SSam Leffler goto discard; 827df8bae1dSRodney W. Grimes l = mtod(m, struct llc *); 8281cafed39SJonathan Lemon if (l->llc_dsap == LLC_SNAP_LSAP && 8291cafed39SJonathan Lemon l->llc_ssap == LLC_SNAP_LSAP && 8301cafed39SJonathan Lemon l->llc_control == LLC_UI) { 8314158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], at_org_code, 832655929bfSJulian Elischer sizeof(at_org_code)) == 0 && 833655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 834797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8351cafed39SJonathan Lemon isr = NETISR_ATALK2; 836655929bfSJulian Elischer break; 837655929bfSJulian Elischer } 8384158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 839655929bfSJulian Elischer sizeof(aarp_org_code)) == 0 && 840655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 841797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8421cafed39SJonathan Lemon isr = NETISR_AARP; 843655929bfSJulian Elischer break; 844df8bae1dSRodney W. Grimes } 8451cafed39SJonathan Lemon } 846242c5536SPeter Wemm #endif /* NETATALK */ 8471cafed39SJonathan Lemon goto discard; 848df8bae1dSRodney W. Grimes } 8491cafed39SJonathan Lemon netisr_dispatch(isr, m); 850c1d93b05SSam Leffler return; 8511cafed39SJonathan Lemon 852c1d93b05SSam Leffler discard: 853c1d93b05SSam Leffler /* 854c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 855c1d93b05SSam Leffler * hand the packet to it for last chance processing; 856c1d93b05SSam Leffler * otherwise dispose of it. 857c1d93b05SSam Leffler */ 858eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 859514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 860514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 861c1d93b05SSam Leffler /* 862c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 863c1d93b05SSam Leffler * consistent view of inbound packets. 864c1d93b05SSam Leffler */ 865797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 866c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 867c1d93b05SSam Leffler return; 868c1d93b05SSam Leffler } 869c1d93b05SSam Leffler m_freem(m); 870c1d93b05SSam Leffler } 871c1d93b05SSam Leffler 872c1d93b05SSam Leffler /* 873c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 874c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 875c1d93b05SSam Leffler * 876c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 877c1d93b05SSam Leffler * 878c1d93b05SSam Leffler * since there's no static buffer involved. 879c1d93b05SSam Leffler */ 880c1d93b05SSam Leffler char * 881c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 882c1d93b05SSam Leffler { 883c1d93b05SSam Leffler static char etherbuf[18]; 884c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 885c1d93b05SSam Leffler return (etherbuf); 886df8bae1dSRodney W. Grimes } 887df8bae1dSRodney W. Grimes 888df8bae1dSRodney W. Grimes /* 889df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 890df8bae1dSRodney W. Grimes */ 891df8bae1dSRodney W. Grimes void 892d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 893df8bae1dSRodney W. Grimes { 894f93dfa28SBrooks Davis int i; 895098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 896098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 897df8bae1dSRodney W. Grimes 898c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 899c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 900cfeff1b6SJonathan Lemon if_attach(ifp); 901df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 902c1d93b05SSam Leffler ifp->if_output = ether_output; 903c1d93b05SSam Leffler ifp->if_input = ether_input; 9041158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 905d3c351c5SMarko Zec #ifdef VIMAGE 906d3c351c5SMarko Zec ifp->if_reassign = ether_reassign; 907d3c351c5SMarko Zec #endif 908a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 909c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 910322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 911c1d93b05SSam Leffler 9124a0d6638SRuslan Ermilov ifa = ifp->if_addr; 9136e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 91459562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 915df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 916df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 917d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 918c1d93b05SSam Leffler 919797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 920e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 921e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 922e3bbbec2SMatthew N. Dodd 923f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 924f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 925d09ed26fSRuslan Ermilov if (lla[i] != 0) 926f93dfa28SBrooks Davis break; 927f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 928d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 929e1e1452dSArchie Cobbs } 930e1e1452dSArchie Cobbs 93121b8ebd9SArchie Cobbs /* 93221b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 93321b8ebd9SArchie Cobbs */ 93421b8ebd9SArchie Cobbs void 935c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 93621b8ebd9SArchie Cobbs { 937514bcb89SPoul-Henning Kamp if (IFP2AC(ifp)->ac_netgraph != NULL) { 938514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 939514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 94021b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 941514bcb89SPoul-Henning Kamp } 94220a65f37SAndrew Thompson 94321b8ebd9SArchie Cobbs bpfdetach(ifp); 94421b8ebd9SArchie Cobbs if_detach(ifp); 94521b8ebd9SArchie Cobbs } 94621b8ebd9SArchie Cobbs 947d3c351c5SMarko Zec #ifdef VIMAGE 948d3c351c5SMarko Zec void 949d3c351c5SMarko Zec ether_reassign(struct ifnet *ifp, struct vnet *new_vnet, char *unused __unused) 950d3c351c5SMarko Zec { 951d3c351c5SMarko Zec 952d3c351c5SMarko Zec if (IFP2AC(ifp)->ac_netgraph != NULL) { 953d3c351c5SMarko Zec KASSERT(ng_ether_detach_p != NULL, 954d3c351c5SMarko Zec ("ng_ether_detach_p is NULL")); 955d3c351c5SMarko Zec (*ng_ether_detach_p)(ifp); 956d3c351c5SMarko Zec } 957d3c351c5SMarko Zec 958d3c351c5SMarko Zec if (ng_ether_attach_p != NULL) { 959d3c351c5SMarko Zec CURVNET_SET_QUIET(new_vnet); 960d3c351c5SMarko Zec (*ng_ether_attach_p)(ifp); 961d3c351c5SMarko Zec CURVNET_RESTORE(); 962d3c351c5SMarko Zec } 963d3c351c5SMarko Zec } 964d3c351c5SMarko Zec #endif 965d3c351c5SMarko Zec 966ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 967602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 96830106f6aSPoul-Henning Kamp 96916b4a343SChristian Weisgerber #if 0 97016b4a343SChristian Weisgerber /* 97116b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 97216b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 97316b4a343SChristian Weisgerber * than the double-loop. 97416b4a343SChristian Weisgerber */ 97516b4a343SChristian Weisgerber uint32_t 97616b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 97716b4a343SChristian Weisgerber { 97816b4a343SChristian Weisgerber size_t i; 97916b4a343SChristian Weisgerber uint32_t crc; 98016b4a343SChristian Weisgerber int bit; 98116b4a343SChristian Weisgerber uint8_t data; 98216b4a343SChristian Weisgerber 98316b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 98416b4a343SChristian Weisgerber 98516b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 986933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 98716b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 98816b4a343SChristian Weisgerber crc >>= 1; 98916b4a343SChristian Weisgerber if (carry) 99016b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 99116b4a343SChristian Weisgerber } 992933dad75SAntoine Brodin } 99316b4a343SChristian Weisgerber 99416b4a343SChristian Weisgerber return (crc); 99516b4a343SChristian Weisgerber } 99616b4a343SChristian Weisgerber #else 99716b4a343SChristian Weisgerber uint32_t 99816b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 99916b4a343SChristian Weisgerber { 100016b4a343SChristian Weisgerber static const uint32_t crctab[] = { 100116b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 100216b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 100316b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 100416b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 100516b4a343SChristian Weisgerber }; 100616b4a343SChristian Weisgerber size_t i; 100716b4a343SChristian Weisgerber uint32_t crc; 100816b4a343SChristian Weisgerber 100916b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 101016b4a343SChristian Weisgerber 101116b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 101216b4a343SChristian Weisgerber crc ^= buf[i]; 101316b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 101416b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 101516b4a343SChristian Weisgerber } 101616b4a343SChristian Weisgerber 101716b4a343SChristian Weisgerber return (crc); 101816b4a343SChristian Weisgerber } 101916b4a343SChristian Weisgerber #endif 102016b4a343SChristian Weisgerber 102116b4a343SChristian Weisgerber uint32_t 102216b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 102316b4a343SChristian Weisgerber { 102416b4a343SChristian Weisgerber size_t i; 102516b4a343SChristian Weisgerber uint32_t crc, carry; 102616b4a343SChristian Weisgerber int bit; 102716b4a343SChristian Weisgerber uint8_t data; 102816b4a343SChristian Weisgerber 102916b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 103016b4a343SChristian Weisgerber 103116b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 103216b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 103316b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 103416b4a343SChristian Weisgerber crc <<= 1; 103516b4a343SChristian Weisgerber if (carry) 103616b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 103716b4a343SChristian Weisgerber } 103816b4a343SChristian Weisgerber } 103916b4a343SChristian Weisgerber 104016b4a343SChristian Weisgerber return (crc); 104116b4a343SChristian Weisgerber } 104216b4a343SChristian Weisgerber 1043fb583156SDavid Greenman int 1044995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 104530106f6aSPoul-Henning Kamp { 104630106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 104730106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 1048fb583156SDavid Greenman int error = 0; 104930106f6aSPoul-Henning Kamp 105030106f6aSPoul-Henning Kamp switch (command) { 105130106f6aSPoul-Henning Kamp case SIOCSIFADDR: 105230106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 105330106f6aSPoul-Henning Kamp 105430106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 105530106f6aSPoul-Henning Kamp #ifdef INET 105630106f6aSPoul-Henning Kamp case AF_INET: 105730106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1058322dcb8dSMax Khon arp_ifinit(ifp, ifa); 105930106f6aSPoul-Henning Kamp break; 106030106f6aSPoul-Henning Kamp #endif 106130106f6aSPoul-Henning Kamp #ifdef IPX 106230106f6aSPoul-Henning Kamp /* 106330106f6aSPoul-Henning Kamp * XXX - This code is probably wrong 106430106f6aSPoul-Henning Kamp */ 106530106f6aSPoul-Henning Kamp case AF_IPX: 106630106f6aSPoul-Henning Kamp { 1067098a8c3bSMatthew N. Dodd struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 106830106f6aSPoul-Henning Kamp 106930106f6aSPoul-Henning Kamp if (ipx_nullhost(*ina)) 107030106f6aSPoul-Henning Kamp ina->x_host = 107186101139SPoul-Henning Kamp *(union ipx_host *) 10724a0d6638SRuslan Ermilov IF_LLADDR(ifp); 107330106f6aSPoul-Henning Kamp else { 107430106f6aSPoul-Henning Kamp bcopy((caddr_t) ina->x_host.c_host, 10754a0d6638SRuslan Ermilov (caddr_t) IF_LLADDR(ifp), 1076fc74a9f9SBrooks Davis ETHER_ADDR_LEN); 107730106f6aSPoul-Henning Kamp } 107830106f6aSPoul-Henning Kamp 107930106f6aSPoul-Henning Kamp /* 108030106f6aSPoul-Henning Kamp * Set new address 108130106f6aSPoul-Henning Kamp */ 108230106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 108330106f6aSPoul-Henning Kamp break; 108430106f6aSPoul-Henning Kamp } 108530106f6aSPoul-Henning Kamp #endif 108630106f6aSPoul-Henning Kamp default: 108730106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 108830106f6aSPoul-Henning Kamp break; 108930106f6aSPoul-Henning Kamp } 109030106f6aSPoul-Henning Kamp break; 109130106f6aSPoul-Henning Kamp 109230106f6aSPoul-Henning Kamp case SIOCGIFADDR: 109330106f6aSPoul-Henning Kamp { 109430106f6aSPoul-Henning Kamp struct sockaddr *sa; 109530106f6aSPoul-Henning Kamp 109630106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 10974a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 109830106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 109930106f6aSPoul-Henning Kamp } 110030106f6aSPoul-Henning Kamp break; 1101fb583156SDavid Greenman 1102fb583156SDavid Greenman case SIOCSIFMTU: 1103fb583156SDavid Greenman /* 1104fb583156SDavid Greenman * Set the interface MTU. 1105fb583156SDavid Greenman */ 1106fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1107fb583156SDavid Greenman error = EINVAL; 1108fb583156SDavid Greenman } else { 1109fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 111030106f6aSPoul-Henning Kamp } 1111fb583156SDavid Greenman break; 1112c1d93b05SSam Leffler default: 1113c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1114c1d93b05SSam Leffler break; 1115fb583156SDavid Greenman } 1116fb583156SDavid Greenman return (error); 111730106f6aSPoul-Henning Kamp } 11181158dfb7SGarrett Wollman 111937c84183SPoul-Henning Kamp static int 112072fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 112172fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 11221158dfb7SGarrett Wollman { 11231158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1124d7647d96SDag-Erling Smørgrav #ifdef INET 11251158dfb7SGarrett Wollman struct sockaddr_in *sin; 1126d7647d96SDag-Erling Smørgrav #endif 112782cd038dSYoshinobu Inoue #ifdef INET6 112882cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 112982cd038dSYoshinobu Inoue #endif 11301158dfb7SGarrett Wollman u_char *e_addr; 11311158dfb7SGarrett Wollman 11321158dfb7SGarrett Wollman switch(sa->sa_family) { 11331158dfb7SGarrett Wollman case AF_LINK: 11347f33a738SJulian Elischer /* 11357f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 11367f33a738SJulian Elischer */ 11371158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 11381158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1139086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 11401158dfb7SGarrett Wollman return EADDRNOTAVAIL; 11411158dfb7SGarrett Wollman *llsa = 0; 11421158dfb7SGarrett Wollman return 0; 11431158dfb7SGarrett Wollman 11441158dfb7SGarrett Wollman #ifdef INET 11451158dfb7SGarrett Wollman case AF_INET: 11461158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 11471158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 11481158dfb7SGarrett Wollman return EADDRNOTAVAIL; 11491ede983cSDag-Erling Smørgrav sdl = malloc(sizeof *sdl, M_IFMADDR, 115009df718eSRobert Watson M_NOWAIT|M_ZERO); 115109df718eSRobert Watson if (sdl == NULL) 115209df718eSRobert Watson return ENOMEM; 11531158dfb7SGarrett Wollman sdl->sdl_len = sizeof *sdl; 11541158dfb7SGarrett Wollman sdl->sdl_family = AF_LINK; 11551158dfb7SGarrett Wollman sdl->sdl_index = ifp->if_index; 11561158dfb7SGarrett Wollman sdl->sdl_type = IFT_ETHER; 11571158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 11581158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 11591158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 11601158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 11611158dfb7SGarrett Wollman return 0; 11621158dfb7SGarrett Wollman #endif 116382cd038dSYoshinobu Inoue #ifdef INET6 116482cd038dSYoshinobu Inoue case AF_INET6: 116582cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1166595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1167595b8a1cSJun-ichiro itojun Hagino /* 1168595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1169595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1170595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1171595b8a1cSJun-ichiro itojun Hagino */ 1172595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1173595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1174595b8a1cSJun-ichiro itojun Hagino return 0; 1175595b8a1cSJun-ichiro itojun Hagino } 117682cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 117782cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 11781ede983cSDag-Erling Smørgrav sdl = malloc(sizeof *sdl, M_IFMADDR, 117909df718eSRobert Watson M_NOWAIT|M_ZERO); 118009df718eSRobert Watson if (sdl == NULL) 118109df718eSRobert Watson return (ENOMEM); 118282cd038dSYoshinobu Inoue sdl->sdl_len = sizeof *sdl; 118382cd038dSYoshinobu Inoue sdl->sdl_family = AF_LINK; 118482cd038dSYoshinobu Inoue sdl->sdl_index = ifp->if_index; 118582cd038dSYoshinobu Inoue sdl->sdl_type = IFT_ETHER; 118682cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 118782cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 118882cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 118982cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 119082cd038dSYoshinobu Inoue return 0; 119182cd038dSYoshinobu Inoue #endif 11921158dfb7SGarrett Wollman 11931158dfb7SGarrett Wollman default: 11941158dfb7SGarrett Wollman /* 11951158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 11961158dfb7SGarrett Wollman * that counts... 11971158dfb7SGarrett Wollman */ 11981158dfb7SGarrett Wollman return EAFNOSUPPORT; 11991158dfb7SGarrett Wollman } 12001158dfb7SGarrett Wollman } 120140811c14SMatthew N. Dodd 1202fc74a9f9SBrooks Davis static void* 1203fc74a9f9SBrooks Davis ether_alloc(u_char type, struct ifnet *ifp) 1204fc74a9f9SBrooks Davis { 1205fc74a9f9SBrooks Davis struct arpcom *ac; 1206fc74a9f9SBrooks Davis 1207fc74a9f9SBrooks Davis ac = malloc(sizeof(struct arpcom), M_ARPCOM, M_WAITOK | M_ZERO); 1208fc74a9f9SBrooks Davis ac->ac_ifp = ifp; 1209fc74a9f9SBrooks Davis 1210fc74a9f9SBrooks Davis return (ac); 1211fc74a9f9SBrooks Davis } 1212fc74a9f9SBrooks Davis 1213fc74a9f9SBrooks Davis static void 1214fc74a9f9SBrooks Davis ether_free(void *com, u_char type) 1215fc74a9f9SBrooks Davis { 1216fc74a9f9SBrooks Davis 1217fc74a9f9SBrooks Davis free(com, M_ARPCOM); 1218fc74a9f9SBrooks Davis } 1219fc74a9f9SBrooks Davis 1220fc74a9f9SBrooks Davis static int 1221fc74a9f9SBrooks Davis ether_modevent(module_t mod, int type, void *data) 1222fc74a9f9SBrooks Davis { 1223fc74a9f9SBrooks Davis 1224fc74a9f9SBrooks Davis switch (type) { 1225fc74a9f9SBrooks Davis case MOD_LOAD: 1226fc74a9f9SBrooks Davis if_register_com_alloc(IFT_ETHER, ether_alloc, ether_free); 1227fc74a9f9SBrooks Davis break; 1228fc74a9f9SBrooks Davis case MOD_UNLOAD: 1229fc74a9f9SBrooks Davis if_deregister_com_alloc(IFT_ETHER); 1230fc74a9f9SBrooks Davis break; 1231fc74a9f9SBrooks Davis default: 1232fc74a9f9SBrooks Davis return EOPNOTSUPP; 1233fc74a9f9SBrooks Davis } 1234fc74a9f9SBrooks Davis 1235fc74a9f9SBrooks Davis return (0); 1236fc74a9f9SBrooks Davis } 1237fc74a9f9SBrooks Davis 123840811c14SMatthew N. Dodd static moduledata_t ether_mod = { 123940811c14SMatthew N. Dodd "ether", 1240fc74a9f9SBrooks Davis ether_modevent, 12419823d527SKevin Lo 0 124240811c14SMatthew N. Dodd }; 124340811c14SMatthew N. Dodd 124452f1277eSChristian S.J. Peron void 124552f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 124652f1277eSChristian S.J. Peron { 124752f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 124852f1277eSChristian S.J. Peron struct mbuf mv, mb; 124952f1277eSChristian S.J. Peron 125052f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 125152f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 125252f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 125352f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 125452f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 125552f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 125652f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 125752f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 125852f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 125952f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 126052f1277eSChristian S.J. Peron /* 126152f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 126252f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 126352f1277eSChristian S.J. Peron * 126452f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 126552f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 126652f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 126752f1277eSChristian S.J. Peron * 126852f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 126952f1277eSChristian S.J. Peron */ 127052f1277eSChristian S.J. Peron if (data != NULL) { 127152f1277eSChristian S.J. Peron mv.m_next = m; 127252f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 127352f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 127452f1277eSChristian S.J. Peron mb.m_next = &mv; 127552f1277eSChristian S.J. Peron mb.m_data = data; 127652f1277eSChristian S.J. Peron mb.m_len = dlen; 127752f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 127852f1277eSChristian S.J. Peron } else 127952f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 128052f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 128152f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 128252f1277eSChristian S.J. Peron } 128352f1277eSChristian S.J. Peron 128460e87ca8SAndrew Thompson struct mbuf * 1285a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 128660e87ca8SAndrew Thompson { 128760e87ca8SAndrew Thompson struct ether_vlan_header *evl; 128860e87ca8SAndrew Thompson 128960e87ca8SAndrew Thompson M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_DONTWAIT); 129060e87ca8SAndrew Thompson if (m == NULL) 129160e87ca8SAndrew Thompson return (NULL); 129260e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 129360e87ca8SAndrew Thompson 129460e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 129560e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 129660e87ca8SAndrew Thompson if (m == NULL) 129760e87ca8SAndrew Thompson return (NULL); 129860e87ca8SAndrew Thompson } 129960e87ca8SAndrew Thompson 130060e87ca8SAndrew Thompson /* 130160e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 130260e87ca8SAndrew Thompson * with 802.1Q encapsulation. 130360e87ca8SAndrew Thompson */ 130460e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 130560e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 130660e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 130760e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 130860e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 130960e87ca8SAndrew Thompson return (m); 131060e87ca8SAndrew Thompson } 131160e87ca8SAndrew Thompson 1312fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 131340811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1314