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> 51ef1f9169SMarcel Moolenaar #include <sys/uuid.h> 52df8bae1dSRodney W. Grimes 53df8bae1dSRodney W. Grimes #include <net/if.h> 5476039bc8SGleb Smirnoff #include <net/if_var.h> 55d7647d96SDag-Erling Smørgrav #include <net/if_arp.h> 56df8bae1dSRodney W. Grimes #include <net/netisr.h> 57df8bae1dSRodney W. Grimes #include <net/route.h> 58df8bae1dSRodney W. Grimes #include <net/if_llc.h> 59df8bae1dSRodney W. Grimes #include <net/if_dl.h> 60df8bae1dSRodney W. Grimes #include <net/if_types.h> 612e2de7f2SArchie Cobbs #include <net/bpf.h> 62e1e1452dSArchie Cobbs #include <net/ethernet.h> 63fd6238a6SAndrew Thompson #include <net/if_bridgevar.h> 64c1d93b05SSam Leffler #include <net/if_vlan_var.h> 656e6b3f7cSQing Li #include <net/if_llatbl.h> 667d4317bdSAlexander V. Chernikov #include <net/pfil.h> 674b79449eSBjoern A. Zeeb #include <net/vnet.h> 68df8bae1dSRodney W. Grimes 6975bf2db3SGleb Smirnoff #include <netpfil/pf/pf_mtag.h> 7075bf2db3SGleb Smirnoff 7182cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 72df8bae1dSRodney W. Grimes #include <netinet/in.h> 73df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 74df8bae1dSRodney W. Grimes #include <netinet/if_ether.h> 7554bfbd51SWill Andrews #include <netinet/ip_carp.h> 760bcfa8e4SLuigi Rizzo #include <netinet/ip_var.h> 771d5e9e22SEivind Eklund #endif 7882cd038dSYoshinobu Inoue #ifdef INET6 7982cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 8082cd038dSYoshinobu Inoue #endif 81df8bae1dSRodney W. Grimes 82cc6a66f2SJulian Elischer #ifdef IPX 83cc6a66f2SJulian Elischer #include <netipx/ipx.h> 84cc6a66f2SJulian Elischer #include <netipx/ipx_if.h> 85a1026028SMaxim Sobolev #endif 866e6b3f7cSQing Li 874f93599fSBoris Popov int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m); 885accfb8cSBoris Popov int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp, 8947e8d432SGleb Smirnoff const struct sockaddr *dst, short *tp, int *hlen); 90cc6a66f2SJulian Elischer 91655929bfSJulian Elischer #ifdef NETATALK 92655929bfSJulian Elischer #include <netatalk/at.h> 93655929bfSJulian Elischer #include <netatalk/at_var.h> 94655929bfSJulian Elischer #include <netatalk/at_extern.h> 95655929bfSJulian Elischer 96655929bfSJulian Elischer #define llc_snap_org_code llc_un.type_snap.org_code 97655929bfSJulian Elischer #define llc_snap_ether_type llc_un.type_snap.ether_type 98655929bfSJulian Elischer 99655929bfSJulian Elischer extern u_char at_org_code[3]; 100655929bfSJulian Elischer extern u_char aarp_org_code[3]; 1012cc2df49SGarrett Wollman #endif /* NETATALK */ 1022cc2df49SGarrett Wollman 103aed55708SRobert Watson #include <security/mac/mac_framework.h> 104aed55708SRobert Watson 105d54d93acSEd Maste #ifdef CTASSERT 106d54d93acSEd Maste CTASSERT(sizeof (struct ether_header) == ETHER_ADDR_LEN * 2 + 2); 107d54d93acSEd Maste CTASSERT(sizeof (struct ether_addr) == ETHER_ADDR_LEN); 108d54d93acSEd Maste #endif 109d54d93acSEd Maste 1107d4317bdSAlexander V. Chernikov VNET_DEFINE(struct pfil_head, link_pfil_hook); /* Packet filter hooks */ 1117d4317bdSAlexander V. Chernikov 112e1e1452dSArchie Cobbs /* netgraph node hooks for ng_ether(4) */ 113c1d93b05SSam Leffler void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 114c1d93b05SSam Leffler void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 115e1e1452dSArchie Cobbs int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 116e1e1452dSArchie Cobbs void (*ng_ether_attach_p)(struct ifnet *ifp); 117e1e1452dSArchie Cobbs void (*ng_ether_detach_p)(struct ifnet *ifp); 118e1e1452dSArchie Cobbs 119824eb9dcSDavid E. O'Brien void (*vlan_input_p)(struct ifnet *, struct mbuf *); 1209d4fe4b2SBrooks Davis 121fd6238a6SAndrew Thompson /* if_bridge(4) support */ 1228f867517SAndrew Thompson struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *); 1238f867517SAndrew Thompson int (*bridge_output_p)(struct ifnet *, struct mbuf *, 1248f867517SAndrew Thompson struct sockaddr *, struct rtentry *); 125c8b01292SAndrew Thompson void (*bridge_dn_p)(struct mbuf *, struct ifnet *); 1268f867517SAndrew Thompson 12718242d3bSAndrew Thompson /* if_lagg(4) support */ 12818242d3bSAndrew Thompson struct mbuf *(*lagg_input_p)(struct ifnet *, struct mbuf *); 129b47888ceSAndrew Thompson 130e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 131868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 132868d8b62SMatthew N. Dodd 133929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 134929ddbbbSAlfred Perlstein struct sockaddr *); 135d3c351c5SMarko Zec #ifdef VIMAGE 136d3c351c5SMarko Zec static void ether_reassign(struct ifnet *, struct vnet *, char *); 137d3c351c5SMarko Zec #endif 138868d8b62SMatthew N. Dodd 139fc74a9f9SBrooks Davis /* XXX: should be in an arp support file, not here */ 140d745c852SEd Schouten static MALLOC_DEFINE(M_ARPCOM, "arpcom", "802.* interface internals"); 141fc74a9f9SBrooks Davis 14269462a82SBruce M Simpson #define ETHER_IS_BROADCAST(addr) \ 14369462a82SBruce M Simpson (bcmp(etherbroadcastaddr, (addr), ETHER_ADDR_LEN) == 0) 14469462a82SBruce M Simpson 1454c8e8c05SJulian Elischer #define senderr(e) do { error = (e); goto bad;} while (0) 146df8bae1dSRodney W. Grimes 14722f8ce43SAlexander V. Chernikov static void 14822f8ce43SAlexander V. Chernikov update_mbuf_csumflags(struct mbuf *src, struct mbuf *dst) 14922f8ce43SAlexander V. Chernikov { 15022f8ce43SAlexander V. Chernikov int csum_flags = 0; 15122f8ce43SAlexander V. Chernikov 15222f8ce43SAlexander V. Chernikov if (src->m_pkthdr.csum_flags & CSUM_IP) 15322f8ce43SAlexander V. Chernikov csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 15422f8ce43SAlexander V. Chernikov if (src->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 15522f8ce43SAlexander V. Chernikov csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 15622f8ce43SAlexander V. Chernikov if (src->m_pkthdr.csum_flags & CSUM_SCTP) 15722f8ce43SAlexander V. Chernikov csum_flags |= CSUM_SCTP_VALID; 15822f8ce43SAlexander V. Chernikov dst->m_pkthdr.csum_flags |= csum_flags; 15922f8ce43SAlexander V. Chernikov if (csum_flags & CSUM_DATA_VALID) 16022f8ce43SAlexander V. Chernikov dst->m_pkthdr.csum_data = 0xffff; 16122f8ce43SAlexander V. Chernikov } 16222f8ce43SAlexander V. Chernikov 163df8bae1dSRodney W. Grimes /* 164df8bae1dSRodney W. Grimes * Ethernet output routine. 165df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 166df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 167df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 168df8bae1dSRodney W. Grimes */ 169df8bae1dSRodney W. Grimes int 17072fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 17147e8d432SGleb Smirnoff const struct sockaddr *dst, struct route *ro) 172df8bae1dSRodney W. Grimes { 173df8bae1dSRodney W. Grimes short type; 174279aa3d4SKip Macy int error = 0, hdrcmplt = 0; 17564760eb0SWarner Losh u_char esrc[ETHER_ADDR_LEN], edst[ETHER_ADDR_LEN]; 1766e6b3f7cSQing Li struct llentry *lle = NULL; 177279aa3d4SKip Macy struct rtentry *rt0 = NULL; 178098a8c3bSMatthew N. Dodd struct ether_header *eh; 17960ee3847SMax Laier struct pf_mtag *t; 180c54c76ccSOleg Bulyzhin int loop_copy = 1; 181d32864c3SRobert Watson int hlen; /* link layer header length */ 182df8bae1dSRodney W. Grimes 183279aa3d4SKip Macy if (ro != NULL) { 1849fca4f79SQing Li if (!(m->m_flags & (M_BCAST | M_MCAST))) 185279aa3d4SKip Macy lle = ro->ro_lle; 186279aa3d4SKip Macy rt0 = ro->ro_rt; 187279aa3d4SKip Macy } 18843b29369SRobert Watson #ifdef MAC 18930d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 19043b29369SRobert Watson if (error) 19143b29369SRobert Watson senderr(error); 19243b29369SRobert Watson #endif 19343b29369SRobert Watson 1946eeac1d9SJulian Elischer M_PROFILE(m); 195afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 196afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 19713f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 19813f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 199df8bae1dSRodney W. Grimes senderr(ENETDOWN); 2007f760c48SMatthew N. Dodd 20184dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 202df8bae1dSRodney W. Grimes switch (dst->sa_family) { 203df8bae1dSRodney W. Grimes #ifdef INET 204df8bae1dSRodney W. Grimes case AF_INET: 205279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 206279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 207279aa3d4SKip Macy else 2086e6b3f7cSQing Li error = arpresolve(ifp, rt0, m, dst, edst, &lle); 209cd46a114SLuigi Rizzo if (error) 210cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 21134bed8b0SDavid Greenman type = htons(ETHERTYPE_IP); 212df8bae1dSRodney W. Grimes break; 21343a6c75aSMatthew N. Dodd case AF_ARP: 21443a6c75aSMatthew N. Dodd { 21543a6c75aSMatthew N. Dodd struct arphdr *ah; 21643a6c75aSMatthew N. Dodd ah = mtod(m, struct arphdr *); 21743a6c75aSMatthew N. Dodd ah->ar_hrd = htons(ARPHRD_ETHER); 21843a6c75aSMatthew N. Dodd 219c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 22043a6c75aSMatthew N. Dodd 22143a6c75aSMatthew N. Dodd switch(ntohs(ah->ar_op)) { 22243a6c75aSMatthew N. Dodd case ARPOP_REVREQUEST: 22343a6c75aSMatthew N. Dodd case ARPOP_REVREPLY: 22443a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_REVARP); 22543a6c75aSMatthew N. Dodd break; 22643a6c75aSMatthew N. Dodd case ARPOP_REQUEST: 22743a6c75aSMatthew N. Dodd case ARPOP_REPLY: 22843a6c75aSMatthew N. Dodd default: 22943a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_ARP); 23043a6c75aSMatthew N. Dodd break; 23143a6c75aSMatthew N. Dodd } 23243a6c75aSMatthew N. Dodd 23343a6c75aSMatthew N. Dodd if (m->m_flags & M_BCAST) 23443a6c75aSMatthew N. Dodd bcopy(ifp->if_broadcastaddr, edst, ETHER_ADDR_LEN); 23543a6c75aSMatthew N. Dodd else 23643a6c75aSMatthew N. Dodd bcopy(ar_tha(ah), edst, ETHER_ADDR_LEN); 23743a6c75aSMatthew N. Dodd 23843a6c75aSMatthew N. Dodd } 23943a6c75aSMatthew N. Dodd break; 240df8bae1dSRodney W. Grimes #endif 24182cd038dSYoshinobu Inoue #ifdef INET6 24282cd038dSYoshinobu Inoue case AF_INET6: 243279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 244279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 245279aa3d4SKip Macy else 2469928dafbSQing Li error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle); 247cd46a114SLuigi Rizzo if (error) 248cd46a114SLuigi Rizzo return error; 24982cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 25082cd038dSYoshinobu Inoue break; 25182cd038dSYoshinobu Inoue #endif 252cc6a66f2SJulian Elischer #ifdef IPX 253cc6a66f2SJulian Elischer case AF_IPX: 2544f93599fSBoris Popov if (ef_outputp) { 2552a7e8eceSBoris Popov error = ef_outputp(ifp, &m, dst, &type, &hlen); 2565accfb8cSBoris Popov if (error) 2575accfb8cSBoris Popov goto bad; 2584f93599fSBoris Popov } else 25934bed8b0SDavid Greenman type = htons(ETHERTYPE_IPX); 26047e8d432SGleb Smirnoff bcopy(&((const struct sockaddr_ipx *)dst)->sipx_addr.x_host, 26147e8d432SGleb Smirnoff edst, sizeof (edst)); 262cc6a66f2SJulian Elischer break; 263cc6a66f2SJulian Elischer #endif 264655929bfSJulian Elischer #ifdef NETATALK 265655929bfSJulian Elischer case AF_APPLETALK: 2661d0eab59SJulian Elischer { 267ed7509acSJulian Elischer struct at_ifaddr *aa; 2681d0eab59SJulian Elischer 26947e8d432SGleb Smirnoff if ((aa = at_ifawithnet((const struct sockaddr_at *)dst)) == NULL) 270cd46a114SLuigi Rizzo senderr(EHOSTUNREACH); /* XXX */ 27147e8d432SGleb Smirnoff if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 2726c7ffe93SRobert Watson ifa_free(&aa->aa_ifa); 2731d0eab59SJulian Elischer return (0); 2746c7ffe93SRobert Watson } 275655929bfSJulian Elischer /* 276ed7509acSJulian Elischer * In the phase 2 case, need to prepend an mbuf for the llc header. 277655929bfSJulian Elischer */ 278655929bfSJulian Elischer if ( aa->aa_flags & AFA_PHASE2 ) { 279655929bfSJulian Elischer struct llc llc; 280655929bfSJulian Elischer 2816c7ffe93SRobert Watson ifa_free(&aa->aa_ifa); 282eb1b1807SGleb Smirnoff M_PREPEND(m, LLC_SNAPFRAMELEN, M_NOWAIT); 2832166ffe8SRobert Watson if (m == NULL) 2842166ffe8SRobert Watson senderr(ENOBUFS); 285655929bfSJulian Elischer llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 286655929bfSJulian Elischer llc.llc_control = LLC_UI; 287655929bfSJulian Elischer bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 288655929bfSJulian Elischer llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 289797f247bSMatthew N. Dodd bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 29034bed8b0SDavid Greenman type = htons(m->m_pkthdr.len); 291797f247bSMatthew N. Dodd hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN; 292655929bfSJulian Elischer } else { 2936c7ffe93SRobert Watson ifa_free(&aa->aa_ifa); 29434bed8b0SDavid Greenman type = htons(ETHERTYPE_AT); 295655929bfSJulian Elischer } 296655929bfSJulian Elischer break; 297ed7509acSJulian Elischer } 2988cdfefbdSPeter Wemm #endif /* NETATALK */ 299df8bae1dSRodney W. Grimes 300114ae644SMike Smith case pseudo_AF_HDRCMPLT: 30147e8d432SGleb Smirnoff { 30247e8d432SGleb Smirnoff const struct ether_header *eh; 30347e8d432SGleb Smirnoff 304114ae644SMike Smith hdrcmplt = 1; 30547e8d432SGleb Smirnoff eh = (const struct ether_header *)dst->sa_data; 306114ae644SMike Smith (void)memcpy(esrc, eh->ether_shost, sizeof (esrc)); 307114ae644SMike Smith /* FALLTHROUGH */ 308114ae644SMike Smith 309df8bae1dSRodney W. Grimes case AF_UNSPEC: 310c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 31147e8d432SGleb Smirnoff eh = (const struct ether_header *)dst->sa_data; 31294a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 313df8bae1dSRodney W. Grimes type = eh->ether_type; 314df8bae1dSRodney W. Grimes break; 31547e8d432SGleb Smirnoff } 316df8bae1dSRodney W. Grimes default: 31729e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 318df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 319df8bae1dSRodney W. Grimes } 320df8bae1dSRodney W. Grimes 3216e6b3f7cSQing Li if (lle != NULL && (lle->la_flags & LLE_IFADDR)) { 32222f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, m); 3236e6b3f7cSQing Li return (if_simloop(ifp, m, dst->sa_family, 0)); 3246e6b3f7cSQing Li } 3256e6b3f7cSQing Li 326df8bae1dSRodney W. Grimes /* 327df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 328df8bae1dSRodney W. Grimes * allocate another. 329df8bae1dSRodney W. Grimes */ 330eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_HDR_LEN, M_NOWAIT); 3312166ffe8SRobert Watson if (m == NULL) 332df8bae1dSRodney W. Grimes senderr(ENOBUFS); 333df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 33494a5d9b6SDavid Greenman (void)memcpy(&eh->ether_type, &type, 335df8bae1dSRodney W. Grimes sizeof(eh->ether_type)); 33694a5d9b6SDavid Greenman (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); 337114ae644SMike Smith if (hdrcmplt) 338114ae644SMike Smith (void)memcpy(eh->ether_shost, esrc, 339114ae644SMike Smith sizeof(eh->ether_shost)); 340114ae644SMike Smith else 3414a0d6638SRuslan Ermilov (void)memcpy(eh->ether_shost, IF_LLADDR(ifp), 342df8bae1dSRodney W. Grimes sizeof(eh->ether_shost)); 343ed7509acSJulian Elischer 344ed7509acSJulian Elischer /* 345ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 346ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 347ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 348ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 349ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 350ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 351ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 352ed7509acSJulian Elischer */ 353c54c76ccSOleg Bulyzhin if ((ifp->if_flags & IFF_SIMPLEX) && loop_copy && 35460ee3847SMax Laier ((t = pf_find_mtag(m)) == NULL || !t->routed)) { 355c54c76ccSOleg Bulyzhin if (m->m_flags & M_BCAST) { 35606f684b0SMatthew N. Dodd struct mbuf *n; 357ed7509acSJulian Elischer 358294dd290SLuigi Rizzo /* 359294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 360294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 361294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 362294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 363294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 364294dd290SLuigi Rizzo * extra data copying vs. extra locking). 3659983b3c0SYaroslav Tykhiy * 3669983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 3679983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 3689983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 369294dd290SLuigi Rizzo */ 370eb1b1807SGleb Smirnoff if ((n = m_dup(m, M_NOWAIT)) != NULL) { 37122f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, n); 37206a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 373c1404dc0SArchie Cobbs } else 374c1404dc0SArchie Cobbs ifp->if_iqdrops++; 37506f684b0SMatthew N. Dodd } else if (bcmp(eh->ether_dhost, eh->ether_shost, 37606f684b0SMatthew N. Dodd ETHER_ADDR_LEN) == 0) { 37722f8ce43SAlexander V. Chernikov update_mbuf_csumflags(m, m); 37806a429a3SArchie Cobbs (void) if_simloop(ifp, m, dst->sa_family, hlen); 379ed7509acSJulian Elischer return (0); /* XXX */ 380ed7509acSJulian Elischer } 381ed7509acSJulian Elischer } 3822e2de7f2SArchie Cobbs 3833f7d1396SAndrew Thompson /* 3843f7d1396SAndrew Thompson * Bridges require special output handling. 3853f7d1396SAndrew Thompson */ 3863f7d1396SAndrew Thompson if (ifp->if_bridge) { 3873f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 3883f7d1396SAndrew Thompson return (error); 3893f7d1396SAndrew Thompson } 3903f7d1396SAndrew Thompson 391259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 392a9771948SGleb Smirnoff if (ifp->if_carp && 39308b68b0eSGleb Smirnoff (error = (*carp_output_p)(ifp, m, dst))) 394a9771948SGleb Smirnoff goto bad; 395a9771948SGleb Smirnoff #endif 396a9771948SGleb Smirnoff 397e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 398eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 399514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 400514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 401e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 402e1e1452dSArchie Cobbs bad: if (m != NULL) 403e1e1452dSArchie Cobbs m_freem(m); 404e1e1452dSArchie Cobbs return (error); 405e1e1452dSArchie Cobbs } 406e1e1452dSArchie Cobbs if (m == NULL) 407e1e1452dSArchie Cobbs return (0); 408e1e1452dSArchie Cobbs } 409e1e1452dSArchie Cobbs 410e1e1452dSArchie Cobbs /* Continue with link-layer output */ 411e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 412e1e1452dSArchie Cobbs } 413e1e1452dSArchie Cobbs 414e1e1452dSArchie Cobbs /* 415e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 416e1e1452dSArchie Cobbs * 417e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 418e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 419e1e1452dSArchie Cobbs */ 420e1e1452dSArchie Cobbs int 421c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 422e1e1452dSArchie Cobbs { 4237d4317bdSAlexander V. Chernikov int i; 4242b25acc1SLuigi Rizzo 4257d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook)) { 4267d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_OUT, NULL); 4277d4317bdSAlexander V. Chernikov 4287d4317bdSAlexander V. Chernikov if (i != 0) 4297d4317bdSAlexander V. Chernikov return (EACCES); 4307d4317bdSAlexander V. Chernikov 4317d4317bdSAlexander V. Chernikov if (m == NULL) 4327d4317bdSAlexander V. Chernikov return (0); 4334b984093SLuigi Rizzo } 4342b25acc1SLuigi Rizzo 435df8bae1dSRodney W. Grimes /* 436df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 437df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 438df8bae1dSRodney W. Grimes */ 439aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 440df8bae1dSRodney W. Grimes } 441df8bae1dSRodney W. Grimes 442d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 443d7647d96SDag-Erling Smørgrav #endif 4444b984093SLuigi Rizzo 4454b984093SLuigi Rizzo /* 446c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 447c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 448df8bae1dSRodney W. Grimes */ 449c1d93b05SSam Leffler static void 4506cb52192SRobert Watson ether_input_internal(struct ifnet *ifp, struct mbuf *m) 451df8bae1dSRodney W. Grimes { 452c1d93b05SSam Leffler struct ether_header *eh; 453c1d93b05SSam Leffler u_short etype; 454df8bae1dSRodney W. Grimes 45569462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 45669462a82SBruce M Simpson m_freem(m); 45769462a82SBruce M Simpson return; 45869462a82SBruce M Simpson } 45969462a82SBruce M Simpson #ifdef DIAGNOSTIC 46069462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 46169462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 46269462a82SBruce M Simpson m_freem(m); 46369462a82SBruce M Simpson return; 46469462a82SBruce M Simpson } 46569462a82SBruce M Simpson #endif 466c1d93b05SSam Leffler /* 467c1d93b05SSam Leffler * Do consistency checks to verify assumptions 468c1d93b05SSam Leffler * made by code past this point. 469c1d93b05SSam Leffler */ 470c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 471c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 472c1d93b05SSam Leffler ifp->if_ierrors++; 473c939f1aeSLuigi Rizzo m_freem(m); 474c939f1aeSLuigi Rizzo return; 475c939f1aeSLuigi Rizzo } 476797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 477c1d93b05SSam Leffler /* XXX maybe should pullup? */ 478c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 479c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 480c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 481c1d93b05SSam Leffler ifp->if_ierrors++; 482c1d93b05SSam Leffler m_freem(m); 483c1d93b05SSam Leffler return; 4842e2de7f2SArchie Cobbs } 485c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 486c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 487c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 488c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 489c1d93b05SSam Leffler ifp->if_ierrors++; 490c1d93b05SSam Leffler m_freem(m); 491c1d93b05SSam Leffler return; 492c1d93b05SSam Leffler } 493c1d93b05SSam Leffler #ifdef DIAGNOSTIC 494c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 4959bf40edeSBrooks Davis if_printf(ifp, "Warning, frame marked as received on %s\n", 4969bf40edeSBrooks Davis m->m_pkthdr.rcvif->if_xname); 497c1d93b05SSam Leffler } 498c1d93b05SSam Leffler #endif 499c1d93b05SSam Leffler 50021ca7b57SMarko Zec CURVNET_SET_QUIET(ifp->if_vnet); 50121ca7b57SMarko Zec 50269462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 50369462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 50469462a82SBruce M Simpson m->m_flags |= M_BCAST; 50569462a82SBruce M Simpson else 50669462a82SBruce M Simpson m->m_flags |= M_MCAST; 50769462a82SBruce M Simpson ifp->if_imcasts++; 50869462a82SBruce M Simpson } 50969462a82SBruce M Simpson 510533d8562SRobert Watson #ifdef MAC 511533d8562SRobert Watson /* 512533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 513533d8562SRobert Watson * consumers can get to it. 514533d8562SRobert Watson */ 51530d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 516533d8562SRobert Watson #endif 517533d8562SRobert Watson 518c1d93b05SSam Leffler /* 51969462a82SBruce M Simpson * Give bpf a chance at the packet. 520c1d93b05SSam Leffler */ 521d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 5222e2de7f2SArchie Cobbs 52369462a82SBruce M Simpson /* 52469462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 52569462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 52669462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 52769462a82SBruce M Simpson */ 528c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 529c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 530c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 531c1d93b05SSam Leffler } 532c1d93b05SSam Leffler 5334cdc1f54SGleb Smirnoff if (!(ifp->if_capenable & IFCAP_HWSTATS)) 534c1d93b05SSam Leffler ifp->if_ibytes += m->m_pkthdr.len; 53505463bb5SDavid Greenman 53669462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 537de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 538de572b37SChristian S.J. Peron m_freem(m); 53921ca7b57SMarko Zec CURVNET_RESTORE(); 540de572b37SChristian S.J. Peron return; 541de572b37SChristian S.J. Peron } 542de572b37SChristian S.J. Peron 54318242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 544b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 54518242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 54618242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 54718242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 548b47888ceSAndrew Thompson if (m != NULL) 549b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 5502db13e75SMarko Zec else { 5512db13e75SMarko Zec CURVNET_RESTORE(); 552b47888ceSAndrew Thompson return; 553b47888ceSAndrew Thompson } 5542db13e75SMarko Zec } 555b47888ceSAndrew Thompson 55669462a82SBruce M Simpson /* 55769462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 55869462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 55969462a82SBruce M Simpson * path correctly. 56069462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 56169462a82SBruce M Simpson */ 56269462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 56369462a82SBruce M Simpson struct ether_vlan_header *evl; 56469462a82SBruce M Simpson 56569462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 56669462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 567402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 56869462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 569402d5e27SBruce M Simpson #endif 57069462a82SBruce M Simpson ifp->if_ierrors++; 57169462a82SBruce M Simpson m_freem(m); 5722db13e75SMarko Zec CURVNET_RESTORE(); 57369462a82SBruce M Simpson return; 57469462a82SBruce M Simpson } 57569462a82SBruce M Simpson 57669462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 57769462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 57869462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 57969462a82SBruce M Simpson 58069462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 58169462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 58269462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 58397cce87fSGleb Smirnoff eh = mtod(m, struct ether_header *); 58469462a82SBruce M Simpson } 58569462a82SBruce M Simpson 586a34c6aebSBjoern A. Zeeb M_SETFIB(m, ifp->if_fib); 587a34c6aebSBjoern A. Zeeb 58869462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 589eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 590514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 59169462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 59269462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 593c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 59421ca7b57SMarko Zec if (m == NULL) { 59521ca7b57SMarko Zec CURVNET_RESTORE(); 596e1e1452dSArchie Cobbs return; 597e1e1452dSArchie Cobbs } 5985e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 59921ca7b57SMarko Zec } 600e1e1452dSArchie Cobbs 6018f867517SAndrew Thompson /* 60269462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 60369462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 60469462a82SBruce M Simpson * and the frame should be delivered locally. 6058f867517SAndrew Thompson */ 60669462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 60769462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 608fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 60921ca7b57SMarko Zec if (m == NULL) { 61021ca7b57SMarko Zec CURVNET_RESTORE(); 6118f867517SAndrew Thompson return; 6128f867517SAndrew Thompson } 6135e9a5429SGleb Smirnoff eh = mtod(m, struct ether_header *); 61421ca7b57SMarko Zec } 6158f867517SAndrew Thompson 616259d2d54SBjoern A. Zeeb #if defined(INET) || defined(INET6) 61769462a82SBruce M Simpson /* 61869462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 61969462a82SBruce M Simpson * mbuf flows up to Layer 3. 62069462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 62169462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 62269462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 62369462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 62469462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 62569462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 62669462a82SBruce M Simpson */ 62754bfbd51SWill Andrews if (ifp->if_carp && (*carp_forus_p)(ifp, eh->ether_dhost)) { 62869462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 62969462a82SBruce M Simpson } else 63069462a82SBruce M Simpson #endif 63169462a82SBruce M Simpson { 63269462a82SBruce M Simpson /* 633e7f8c833SBruce M Simpson * If the frame received was not for our MAC address, set the 63469462a82SBruce M Simpson * M_PROMISC flag on the mbuf chain. The frame may need to 63569462a82SBruce M Simpson * be seen by the rest of the Ethernet input path in case of 63669462a82SBruce M Simpson * re-entry (e.g. bridge, vlan, netgraph) but should not be 63769462a82SBruce M Simpson * seen by upper protocol layers. 63869462a82SBruce M Simpson */ 63969462a82SBruce M Simpson if (!ETHER_IS_MULTICAST(eh->ether_dhost) && 640e7f8c833SBruce M Simpson bcmp(IF_LLADDR(ifp), eh->ether_dhost, ETHER_ADDR_LEN) != 0) 64169462a82SBruce M Simpson m->m_flags |= M_PROMISC; 64269462a82SBruce M Simpson } 64369462a82SBruce M Simpson 64410b1fde0SMark Murray if (harvest.ethernet) 645dd50b310SAdrian Chadd random_harvest(&(m->m_data), 12, 2, RANDOM_NET_ETHER); 64669462a82SBruce M Simpson 647acf032f5SRobert Watson ether_demux(ifp, m); 64821ca7b57SMarko Zec CURVNET_RESTORE(); 649e1e1452dSArchie Cobbs } 650e1e1452dSArchie Cobbs 651e1e1452dSArchie Cobbs /* 6526cb52192SRobert Watson * Ethernet input dispatch; by default, direct dispatch here regardless of 6536cb52192SRobert Watson * global configuration. 6546cb52192SRobert Watson */ 6556cb52192SRobert Watson static void 6566cb52192SRobert Watson ether_nh_input(struct mbuf *m) 6576cb52192SRobert Watson { 6586cb52192SRobert Watson 6596cb52192SRobert Watson ether_input_internal(m->m_pkthdr.rcvif, m); 6606cb52192SRobert Watson } 6616cb52192SRobert Watson 6626cb52192SRobert Watson static struct netisr_handler ether_nh = { 6636cb52192SRobert Watson .nh_name = "ether", 6646cb52192SRobert Watson .nh_handler = ether_nh_input, 6656cb52192SRobert Watson .nh_proto = NETISR_ETHER, 6666cb52192SRobert Watson .nh_policy = NETISR_POLICY_SOURCE, 6676cb52192SRobert Watson .nh_dispatch = NETISR_DISPATCH_DIRECT, 6686cb52192SRobert Watson }; 6696cb52192SRobert Watson 6706cb52192SRobert Watson static void 6716cb52192SRobert Watson ether_init(__unused void *arg) 6726cb52192SRobert Watson { 6736cb52192SRobert Watson 6746cb52192SRobert Watson netisr_register(ðer_nh); 6756cb52192SRobert Watson } 6766cb52192SRobert Watson SYSINIT(ether, SI_SUB_INIT_IF, SI_ORDER_ANY, ether_init, NULL); 6776cb52192SRobert Watson 6786cb52192SRobert Watson static void 6797d4317bdSAlexander V. Chernikov vnet_ether_init(__unused void *arg) 6807d4317bdSAlexander V. Chernikov { 6817d4317bdSAlexander V. Chernikov int i; 6827d4317bdSAlexander V. Chernikov 6837d4317bdSAlexander V. Chernikov /* Initialize packet filter hooks. */ 6847d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_type = PFIL_TYPE_AF; 6857d4317bdSAlexander V. Chernikov V_link_pfil_hook.ph_af = AF_LINK; 6867d4317bdSAlexander V. Chernikov if ((i = pfil_head_register(&V_link_pfil_hook)) != 0) 6877d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to register pfil link hook, " 6887d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 6897d4317bdSAlexander V. Chernikov } 6907d4317bdSAlexander V. Chernikov VNET_SYSINIT(vnet_ether_init, SI_SUB_PROTO_IF, SI_ORDER_ANY, 6917d4317bdSAlexander V. Chernikov vnet_ether_init, NULL); 6927d4317bdSAlexander V. Chernikov 6937d4317bdSAlexander V. Chernikov static void 6947d4317bdSAlexander V. Chernikov vnet_ether_destroy(__unused void *arg) 6957d4317bdSAlexander V. Chernikov { 6967d4317bdSAlexander V. Chernikov int i; 6977d4317bdSAlexander V. Chernikov 6987d4317bdSAlexander V. Chernikov if ((i = pfil_head_unregister(&V_link_pfil_hook)) != 0) 6997d4317bdSAlexander V. Chernikov printf("%s: WARNING: unable to unregister pfil link hook, " 7007d4317bdSAlexander V. Chernikov "error %d\n", __func__, i); 7017d4317bdSAlexander V. Chernikov } 7027d4317bdSAlexander V. Chernikov VNET_SYSUNINIT(vnet_ether_uninit, SI_SUB_PROTO_IF, SI_ORDER_ANY, 7037d4317bdSAlexander V. Chernikov vnet_ether_destroy, NULL); 7047d4317bdSAlexander V. Chernikov 7057d4317bdSAlexander V. Chernikov 7067d4317bdSAlexander V. Chernikov 7077d4317bdSAlexander V. Chernikov static void 7086cb52192SRobert Watson ether_input(struct ifnet *ifp, struct mbuf *m) 7096cb52192SRobert Watson { 7106cb52192SRobert Watson 7114857f5fbSGeorge V. Neville-Neil struct mbuf *mn; 7124857f5fbSGeorge V. Neville-Neil 7134857f5fbSGeorge V. Neville-Neil /* 7144857f5fbSGeorge V. Neville-Neil * The drivers are allowed to pass in a chain of packets linked with 7154857f5fbSGeorge V. Neville-Neil * m_nextpkt. We split them up into separate packets here and pass 7164857f5fbSGeorge V. Neville-Neil * them up. This allows the drivers to amortize the receive lock. 7174857f5fbSGeorge V. Neville-Neil */ 7184857f5fbSGeorge V. Neville-Neil while (m) { 7194857f5fbSGeorge V. Neville-Neil mn = m->m_nextpkt; 7204857f5fbSGeorge V. Neville-Neil m->m_nextpkt = NULL; 7214857f5fbSGeorge V. Neville-Neil 7226cb52192SRobert Watson /* 7236cb52192SRobert Watson * We will rely on rcvif being set properly in the deferred context, 7246cb52192SRobert Watson * so assert it is correct here. 7256cb52192SRobert Watson */ 7266cb52192SRobert Watson KASSERT(m->m_pkthdr.rcvif == ifp, ("%s: ifnet mismatch", __func__)); 7276cb52192SRobert Watson netisr_dispatch(NETISR_ETHER, m); 7284857f5fbSGeorge V. Neville-Neil m = mn; 7294857f5fbSGeorge V. Neville-Neil } 7306cb52192SRobert Watson } 7316cb52192SRobert Watson 7326cb52192SRobert Watson /* 733e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 734e1e1452dSArchie Cobbs */ 735e1e1452dSArchie Cobbs void 736c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 737e1e1452dSArchie Cobbs { 738c1d93b05SSam Leffler struct ether_header *eh; 7397d4317bdSAlexander V. Chernikov int i, isr; 740e1e1452dSArchie Cobbs u_short ether_type; 741e1e1452dSArchie Cobbs #if defined(NETATALK) 742098a8c3bSMatthew N. Dodd struct llc *l; 743e1e1452dSArchie Cobbs #endif 74469462a82SBruce M Simpson 74569462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 74669462a82SBruce M Simpson 7477d4317bdSAlexander V. Chernikov /* Do not grab PROMISC frames in case we are re-entered. */ 7487d4317bdSAlexander V. Chernikov if (PFIL_HOOKED(&V_link_pfil_hook) && !(m->m_flags & M_PROMISC)) { 7497d4317bdSAlexander V. Chernikov i = pfil_run_hooks(&V_link_pfil_hook, &m, ifp, PFIL_IN, NULL); 7507d4317bdSAlexander V. Chernikov 7517d4317bdSAlexander V. Chernikov if (i != 0 || m == NULL) 7527d4317bdSAlexander V. Chernikov return; 75369462a82SBruce M Simpson } 7547d4317bdSAlexander V. Chernikov 755c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 756cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 757c1d93b05SSam Leffler 758a9771948SGleb Smirnoff /* 75969462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 76069462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 761a9771948SGleb Smirnoff */ 76269462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 76369462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 76475ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 7656c23e6ccSRuslan Ermilov ifp->if_noproto++; 7666c23e6ccSRuslan Ermilov m_freem(m); 7676c23e6ccSRuslan Ermilov return; 7686c23e6ccSRuslan Ermilov } 76969462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 77069462a82SBruce M Simpson __func__)); 77169462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 77269462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 773c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 774c1d93b05SSam Leffler return; 775c1d93b05SSam Leffler } 776c1d93b05SSam Leffler 777c1d93b05SSam Leffler /* 77869462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 77969462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 780c1d93b05SSam Leffler */ 78169462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 782c1d93b05SSam Leffler m_freem(m); 783c1d93b05SSam Leffler return; 784c1d93b05SSam Leffler } 785c1d93b05SSam Leffler 78669462a82SBruce M Simpson /* 78769462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 78869462a82SBruce M Simpson * Strip off Ethernet header. 78969462a82SBruce M Simpson */ 79069462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 79186bd0491SAndre Oppermann m_clrprotoflags(m); 792797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 793c1d93b05SSam Leffler 79469462a82SBruce M Simpson /* 79569462a82SBruce M Simpson * Dispatch frame to upper layer. 79669462a82SBruce M Simpson */ 797307d80beSDavid Greenman switch (ether_type) { 798df8bae1dSRodney W. Grimes #ifdef INET 799df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 8005d691e6dSAndre Oppermann if ((m = ip_fastforward(m)) == NULL) 8011f91d8c5SDavid Greenman return; 8021cafed39SJonathan Lemon isr = NETISR_IP; 803df8bae1dSRodney W. Grimes break; 804df8bae1dSRodney W. Grimes 805df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 80608aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 80708aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 80808aadfbbSJonathan Lemon m_freem(m); 80908aadfbbSJonathan Lemon return; 81008aadfbbSJonathan Lemon } 8111cafed39SJonathan Lemon isr = NETISR_ARP; 812df8bae1dSRodney W. Grimes break; 813df8bae1dSRodney W. Grimes #endif 814cc6a66f2SJulian Elischer #ifdef IPX 815cc6a66f2SJulian Elischer case ETHERTYPE_IPX: 8164f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 8174f93599fSBoris Popov return; 8181cafed39SJonathan Lemon isr = NETISR_IPX; 819cc6a66f2SJulian Elischer break; 820cc6a66f2SJulian Elischer #endif 82182cd038dSYoshinobu Inoue #ifdef INET6 82282cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 8231cafed39SJonathan Lemon isr = NETISR_IPV6; 82482cd038dSYoshinobu Inoue break; 82582cd038dSYoshinobu Inoue #endif 826655929bfSJulian Elischer #ifdef NETATALK 827655929bfSJulian Elischer case ETHERTYPE_AT: 8281cafed39SJonathan Lemon isr = NETISR_ATALK1; 829655929bfSJulian Elischer break; 830655929bfSJulian Elischer case ETHERTYPE_AARP: 8311cafed39SJonathan Lemon isr = NETISR_AARP; 8321cafed39SJonathan Lemon break; 8338cdfefbdSPeter Wemm #endif /* NETATALK */ 834df8bae1dSRodney W. Grimes default: 8354f93599fSBoris Popov #ifdef IPX 8364f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 8374f93599fSBoris Popov return; 8384f93599fSBoris Popov #endif /* IPX */ 839242c5536SPeter Wemm #if defined(NETATALK) 840307d80beSDavid Greenman if (ether_type > ETHERMTU) 841c1d93b05SSam Leffler goto discard; 842df8bae1dSRodney W. Grimes l = mtod(m, struct llc *); 8431cafed39SJonathan Lemon if (l->llc_dsap == LLC_SNAP_LSAP && 8441cafed39SJonathan Lemon l->llc_ssap == LLC_SNAP_LSAP && 8451cafed39SJonathan Lemon l->llc_control == LLC_UI) { 8464158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], at_org_code, 847655929bfSJulian Elischer sizeof(at_org_code)) == 0 && 848655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 849797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8501cafed39SJonathan Lemon isr = NETISR_ATALK2; 851655929bfSJulian Elischer break; 852655929bfSJulian Elischer } 8534158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 854655929bfSJulian Elischer sizeof(aarp_org_code)) == 0 && 855655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 856797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8571cafed39SJonathan Lemon isr = NETISR_AARP; 858655929bfSJulian Elischer break; 859df8bae1dSRodney W. Grimes } 8601cafed39SJonathan Lemon } 861242c5536SPeter Wemm #endif /* NETATALK */ 8621cafed39SJonathan Lemon goto discard; 863df8bae1dSRodney W. Grimes } 8641cafed39SJonathan Lemon netisr_dispatch(isr, m); 865c1d93b05SSam Leffler return; 8661cafed39SJonathan Lemon 867c1d93b05SSam Leffler discard: 868c1d93b05SSam Leffler /* 869c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 870c1d93b05SSam Leffler * hand the packet to it for last chance processing; 871c1d93b05SSam Leffler * otherwise dispose of it. 872c1d93b05SSam Leffler */ 873eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 874514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 875514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 876c1d93b05SSam Leffler /* 877c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 878c1d93b05SSam Leffler * consistent view of inbound packets. 879c1d93b05SSam Leffler */ 880eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_HDR_LEN, M_NOWAIT); 881c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 882c1d93b05SSam Leffler return; 883c1d93b05SSam Leffler } 884c1d93b05SSam Leffler m_freem(m); 885c1d93b05SSam Leffler } 886c1d93b05SSam Leffler 887c1d93b05SSam Leffler /* 888c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 889c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 890c1d93b05SSam Leffler * 891c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 892c1d93b05SSam Leffler * 893c1d93b05SSam Leffler * since there's no static buffer involved. 894c1d93b05SSam Leffler */ 895c1d93b05SSam Leffler char * 896c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 897c1d93b05SSam Leffler { 898c1d93b05SSam Leffler static char etherbuf[18]; 899c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 900c1d93b05SSam Leffler return (etherbuf); 901df8bae1dSRodney W. Grimes } 902df8bae1dSRodney W. Grimes 903df8bae1dSRodney W. Grimes /* 904df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 905df8bae1dSRodney W. Grimes */ 906df8bae1dSRodney W. Grimes void 907d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 908df8bae1dSRodney W. Grimes { 909f93dfa28SBrooks Davis int i; 910098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 911098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 912df8bae1dSRodney W. Grimes 913c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 914c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 915cfeff1b6SJonathan Lemon if_attach(ifp); 916df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 917c1d93b05SSam Leffler ifp->if_output = ether_output; 918c1d93b05SSam Leffler ifp->if_input = ether_input; 9191158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 920d3c351c5SMarko Zec #ifdef VIMAGE 921d3c351c5SMarko Zec ifp->if_reassign = ether_reassign; 922d3c351c5SMarko Zec #endif 923a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 924c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 925322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 926c1d93b05SSam Leffler 9274a0d6638SRuslan Ermilov ifa = ifp->if_addr; 9286e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 92959562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 930df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 931df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 932d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 933c1d93b05SSam Leffler 934797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 935e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 936e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 937e3bbbec2SMatthew N. Dodd 938f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 939f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 940d09ed26fSRuslan Ermilov if (lla[i] != 0) 941f93dfa28SBrooks Davis break; 942f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 943d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 944ef1f9169SMarcel Moolenaar 945ef1f9169SMarcel Moolenaar uuid_ether_add(LLADDR(sdl)); 946e1e1452dSArchie Cobbs } 947e1e1452dSArchie Cobbs 94821b8ebd9SArchie Cobbs /* 94921b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 95021b8ebd9SArchie Cobbs */ 95121b8ebd9SArchie Cobbs void 952c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 95321b8ebd9SArchie Cobbs { 954ef1f9169SMarcel Moolenaar struct sockaddr_dl *sdl; 955ef1f9169SMarcel Moolenaar 956ef1f9169SMarcel Moolenaar sdl = (struct sockaddr_dl *)(ifp->if_addr->ifa_addr); 957ef1f9169SMarcel Moolenaar uuid_ether_del(LLADDR(sdl)); 958ef1f9169SMarcel Moolenaar 959514bcb89SPoul-Henning Kamp if (IFP2AC(ifp)->ac_netgraph != NULL) { 960514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 961514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 96221b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 963514bcb89SPoul-Henning Kamp } 96420a65f37SAndrew Thompson 96521b8ebd9SArchie Cobbs bpfdetach(ifp); 96621b8ebd9SArchie Cobbs if_detach(ifp); 96721b8ebd9SArchie Cobbs } 96821b8ebd9SArchie Cobbs 969d3c351c5SMarko Zec #ifdef VIMAGE 970d3c351c5SMarko Zec void 971d3c351c5SMarko Zec ether_reassign(struct ifnet *ifp, struct vnet *new_vnet, char *unused __unused) 972d3c351c5SMarko Zec { 973d3c351c5SMarko Zec 974d3c351c5SMarko Zec if (IFP2AC(ifp)->ac_netgraph != NULL) { 975d3c351c5SMarko Zec KASSERT(ng_ether_detach_p != NULL, 976d3c351c5SMarko Zec ("ng_ether_detach_p is NULL")); 977d3c351c5SMarko Zec (*ng_ether_detach_p)(ifp); 978d3c351c5SMarko Zec } 979d3c351c5SMarko Zec 980d3c351c5SMarko Zec if (ng_ether_attach_p != NULL) { 981d3c351c5SMarko Zec CURVNET_SET_QUIET(new_vnet); 982d3c351c5SMarko Zec (*ng_ether_attach_p)(ifp); 983d3c351c5SMarko Zec CURVNET_RESTORE(); 984d3c351c5SMarko Zec } 985d3c351c5SMarko Zec } 986d3c351c5SMarko Zec #endif 987d3c351c5SMarko Zec 988ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 989602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 99030106f6aSPoul-Henning Kamp 99116b4a343SChristian Weisgerber #if 0 99216b4a343SChristian Weisgerber /* 99316b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 99416b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 99516b4a343SChristian Weisgerber * than the double-loop. 99616b4a343SChristian Weisgerber */ 99716b4a343SChristian Weisgerber uint32_t 99816b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 99916b4a343SChristian Weisgerber { 100016b4a343SChristian Weisgerber size_t i; 100116b4a343SChristian Weisgerber uint32_t crc; 100216b4a343SChristian Weisgerber int bit; 100316b4a343SChristian Weisgerber uint8_t data; 100416b4a343SChristian Weisgerber 100516b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 100616b4a343SChristian Weisgerber 100716b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 1008933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 100916b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 101016b4a343SChristian Weisgerber crc >>= 1; 101116b4a343SChristian Weisgerber if (carry) 101216b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 101316b4a343SChristian Weisgerber } 1014933dad75SAntoine Brodin } 101516b4a343SChristian Weisgerber 101616b4a343SChristian Weisgerber return (crc); 101716b4a343SChristian Weisgerber } 101816b4a343SChristian Weisgerber #else 101916b4a343SChristian Weisgerber uint32_t 102016b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 102116b4a343SChristian Weisgerber { 102216b4a343SChristian Weisgerber static const uint32_t crctab[] = { 102316b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 102416b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 102516b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 102616b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 102716b4a343SChristian Weisgerber }; 102816b4a343SChristian Weisgerber size_t i; 102916b4a343SChristian Weisgerber uint32_t crc; 103016b4a343SChristian Weisgerber 103116b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 103216b4a343SChristian Weisgerber 103316b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 103416b4a343SChristian Weisgerber crc ^= buf[i]; 103516b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 103616b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 103716b4a343SChristian Weisgerber } 103816b4a343SChristian Weisgerber 103916b4a343SChristian Weisgerber return (crc); 104016b4a343SChristian Weisgerber } 104116b4a343SChristian Weisgerber #endif 104216b4a343SChristian Weisgerber 104316b4a343SChristian Weisgerber uint32_t 104416b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 104516b4a343SChristian Weisgerber { 104616b4a343SChristian Weisgerber size_t i; 104716b4a343SChristian Weisgerber uint32_t crc, carry; 104816b4a343SChristian Weisgerber int bit; 104916b4a343SChristian Weisgerber uint8_t data; 105016b4a343SChristian Weisgerber 105116b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 105216b4a343SChristian Weisgerber 105316b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 105416b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 105516b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 105616b4a343SChristian Weisgerber crc <<= 1; 105716b4a343SChristian Weisgerber if (carry) 105816b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 105916b4a343SChristian Weisgerber } 106016b4a343SChristian Weisgerber } 106116b4a343SChristian Weisgerber 106216b4a343SChristian Weisgerber return (crc); 106316b4a343SChristian Weisgerber } 106416b4a343SChristian Weisgerber 1065fb583156SDavid Greenman int 1066995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 106730106f6aSPoul-Henning Kamp { 106830106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 106930106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 1070fb583156SDavid Greenman int error = 0; 107130106f6aSPoul-Henning Kamp 107230106f6aSPoul-Henning Kamp switch (command) { 107330106f6aSPoul-Henning Kamp case SIOCSIFADDR: 107430106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 107530106f6aSPoul-Henning Kamp 107630106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 107730106f6aSPoul-Henning Kamp #ifdef INET 107830106f6aSPoul-Henning Kamp case AF_INET: 107930106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1080322dcb8dSMax Khon arp_ifinit(ifp, ifa); 108130106f6aSPoul-Henning Kamp break; 108230106f6aSPoul-Henning Kamp #endif 108330106f6aSPoul-Henning Kamp #ifdef IPX 108430106f6aSPoul-Henning Kamp /* 108530106f6aSPoul-Henning Kamp * XXX - This code is probably wrong 108630106f6aSPoul-Henning Kamp */ 108730106f6aSPoul-Henning Kamp case AF_IPX: 108830106f6aSPoul-Henning Kamp { 1089098a8c3bSMatthew N. Dodd struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 109030106f6aSPoul-Henning Kamp 109130106f6aSPoul-Henning Kamp if (ipx_nullhost(*ina)) 109230106f6aSPoul-Henning Kamp ina->x_host = 109386101139SPoul-Henning Kamp *(union ipx_host *) 10944a0d6638SRuslan Ermilov IF_LLADDR(ifp); 109530106f6aSPoul-Henning Kamp else { 109630106f6aSPoul-Henning Kamp bcopy((caddr_t) ina->x_host.c_host, 10974a0d6638SRuslan Ermilov (caddr_t) IF_LLADDR(ifp), 1098fc74a9f9SBrooks Davis ETHER_ADDR_LEN); 109930106f6aSPoul-Henning Kamp } 110030106f6aSPoul-Henning Kamp 110130106f6aSPoul-Henning Kamp /* 110230106f6aSPoul-Henning Kamp * Set new address 110330106f6aSPoul-Henning Kamp */ 110430106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 110530106f6aSPoul-Henning Kamp break; 110630106f6aSPoul-Henning Kamp } 110730106f6aSPoul-Henning Kamp #endif 110830106f6aSPoul-Henning Kamp default: 110930106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 111030106f6aSPoul-Henning Kamp break; 111130106f6aSPoul-Henning Kamp } 111230106f6aSPoul-Henning Kamp break; 111330106f6aSPoul-Henning Kamp 111430106f6aSPoul-Henning Kamp case SIOCGIFADDR: 111530106f6aSPoul-Henning Kamp { 111630106f6aSPoul-Henning Kamp struct sockaddr *sa; 111730106f6aSPoul-Henning Kamp 111830106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 11194a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 112030106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 112130106f6aSPoul-Henning Kamp } 112230106f6aSPoul-Henning Kamp break; 1123fb583156SDavid Greenman 1124fb583156SDavid Greenman case SIOCSIFMTU: 1125fb583156SDavid Greenman /* 1126fb583156SDavid Greenman * Set the interface MTU. 1127fb583156SDavid Greenman */ 1128fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1129fb583156SDavid Greenman error = EINVAL; 1130fb583156SDavid Greenman } else { 1131fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 113230106f6aSPoul-Henning Kamp } 1133fb583156SDavid Greenman break; 1134c1d93b05SSam Leffler default: 1135c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1136c1d93b05SSam Leffler break; 1137fb583156SDavid Greenman } 1138fb583156SDavid Greenman return (error); 113930106f6aSPoul-Henning Kamp } 11401158dfb7SGarrett Wollman 114137c84183SPoul-Henning Kamp static int 114272fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 114372fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 11441158dfb7SGarrett Wollman { 11451158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1146d7647d96SDag-Erling Smørgrav #ifdef INET 11471158dfb7SGarrett Wollman struct sockaddr_in *sin; 1148d7647d96SDag-Erling Smørgrav #endif 114982cd038dSYoshinobu Inoue #ifdef INET6 115082cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 115182cd038dSYoshinobu Inoue #endif 11521158dfb7SGarrett Wollman u_char *e_addr; 11531158dfb7SGarrett Wollman 11541158dfb7SGarrett Wollman switch(sa->sa_family) { 11551158dfb7SGarrett Wollman case AF_LINK: 11567f33a738SJulian Elischer /* 11577f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 11587f33a738SJulian Elischer */ 11591158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 11601158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1161086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 11621158dfb7SGarrett Wollman return EADDRNOTAVAIL; 11631158dfb7SGarrett Wollman *llsa = 0; 11641158dfb7SGarrett Wollman return 0; 11651158dfb7SGarrett Wollman 11661158dfb7SGarrett Wollman #ifdef INET 11671158dfb7SGarrett Wollman case AF_INET: 11681158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 11691158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 11701158dfb7SGarrett Wollman return EADDRNOTAVAIL; 117195fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 11721158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 11731158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 11741158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 11751158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 11761158dfb7SGarrett Wollman return 0; 11771158dfb7SGarrett Wollman #endif 117882cd038dSYoshinobu Inoue #ifdef INET6 117982cd038dSYoshinobu Inoue case AF_INET6: 118082cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1181595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1182595b8a1cSJun-ichiro itojun Hagino /* 1183595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1184595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1185595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1186595b8a1cSJun-ichiro itojun Hagino */ 1187595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1188595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1189595b8a1cSJun-ichiro itojun Hagino return 0; 1190595b8a1cSJun-ichiro itojun Hagino } 119182cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 119282cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 119395fbe4d0SAlexander V. Chernikov sdl = link_init_sdl(ifp, *llsa, IFT_ETHER); 119482cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 119582cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 119682cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 119782cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 119882cd038dSYoshinobu Inoue return 0; 119982cd038dSYoshinobu Inoue #endif 12001158dfb7SGarrett Wollman 12011158dfb7SGarrett Wollman default: 12021158dfb7SGarrett Wollman /* 12031158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 12041158dfb7SGarrett Wollman * that counts... 12051158dfb7SGarrett Wollman */ 12061158dfb7SGarrett Wollman return EAFNOSUPPORT; 12071158dfb7SGarrett Wollman } 12081158dfb7SGarrett Wollman } 120940811c14SMatthew N. Dodd 1210fc74a9f9SBrooks Davis static void* 1211fc74a9f9SBrooks Davis ether_alloc(u_char type, struct ifnet *ifp) 1212fc74a9f9SBrooks Davis { 1213fc74a9f9SBrooks Davis struct arpcom *ac; 1214fc74a9f9SBrooks Davis 1215fc74a9f9SBrooks Davis ac = malloc(sizeof(struct arpcom), M_ARPCOM, M_WAITOK | M_ZERO); 1216fc74a9f9SBrooks Davis ac->ac_ifp = ifp; 1217fc74a9f9SBrooks Davis 1218fc74a9f9SBrooks Davis return (ac); 1219fc74a9f9SBrooks Davis } 1220fc74a9f9SBrooks Davis 1221fc74a9f9SBrooks Davis static void 1222fc74a9f9SBrooks Davis ether_free(void *com, u_char type) 1223fc74a9f9SBrooks Davis { 1224fc74a9f9SBrooks Davis 1225fc74a9f9SBrooks Davis free(com, M_ARPCOM); 1226fc74a9f9SBrooks Davis } 1227fc74a9f9SBrooks Davis 1228fc74a9f9SBrooks Davis static int 1229fc74a9f9SBrooks Davis ether_modevent(module_t mod, int type, void *data) 1230fc74a9f9SBrooks Davis { 1231fc74a9f9SBrooks Davis 1232fc74a9f9SBrooks Davis switch (type) { 1233fc74a9f9SBrooks Davis case MOD_LOAD: 1234fc74a9f9SBrooks Davis if_register_com_alloc(IFT_ETHER, ether_alloc, ether_free); 1235fc74a9f9SBrooks Davis break; 1236fc74a9f9SBrooks Davis case MOD_UNLOAD: 1237fc74a9f9SBrooks Davis if_deregister_com_alloc(IFT_ETHER); 1238fc74a9f9SBrooks Davis break; 1239fc74a9f9SBrooks Davis default: 1240fc74a9f9SBrooks Davis return EOPNOTSUPP; 1241fc74a9f9SBrooks Davis } 1242fc74a9f9SBrooks Davis 1243fc74a9f9SBrooks Davis return (0); 1244fc74a9f9SBrooks Davis } 1245fc74a9f9SBrooks Davis 124640811c14SMatthew N. Dodd static moduledata_t ether_mod = { 124740811c14SMatthew N. Dodd "ether", 1248fc74a9f9SBrooks Davis ether_modevent, 12499823d527SKevin Lo 0 125040811c14SMatthew N. Dodd }; 125140811c14SMatthew N. Dodd 125252f1277eSChristian S.J. Peron void 125352f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 125452f1277eSChristian S.J. Peron { 125552f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 125652f1277eSChristian S.J. Peron struct mbuf mv, mb; 125752f1277eSChristian S.J. Peron 125852f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 125952f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 126052f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 126152f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 126252f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 126352f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 126452f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 126552f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 126652f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 126752f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 126852f1277eSChristian S.J. Peron /* 126952f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 127052f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 127152f1277eSChristian S.J. Peron * 127252f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 127352f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 127452f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 127552f1277eSChristian S.J. Peron * 127652f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 127752f1277eSChristian S.J. Peron */ 127852f1277eSChristian S.J. Peron if (data != NULL) { 127952f1277eSChristian S.J. Peron mv.m_next = m; 128052f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 128152f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 128252f1277eSChristian S.J. Peron mb.m_next = &mv; 128352f1277eSChristian S.J. Peron mb.m_data = data; 128452f1277eSChristian S.J. Peron mb.m_len = dlen; 128552f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 128652f1277eSChristian S.J. Peron } else 128752f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 128852f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 128952f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 129052f1277eSChristian S.J. Peron } 129152f1277eSChristian S.J. Peron 129260e87ca8SAndrew Thompson struct mbuf * 1293a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 129460e87ca8SAndrew Thompson { 129560e87ca8SAndrew Thompson struct ether_vlan_header *evl; 129660e87ca8SAndrew Thompson 1297eb1b1807SGleb Smirnoff M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_NOWAIT); 129860e87ca8SAndrew Thompson if (m == NULL) 129960e87ca8SAndrew Thompson return (NULL); 130060e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 130160e87ca8SAndrew Thompson 130260e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 130360e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 130460e87ca8SAndrew Thompson if (m == NULL) 130560e87ca8SAndrew Thompson return (NULL); 130660e87ca8SAndrew Thompson } 130760e87ca8SAndrew Thompson 130860e87ca8SAndrew Thompson /* 130960e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 131060e87ca8SAndrew Thompson * with 802.1Q encapsulation. 131160e87ca8SAndrew Thompson */ 131260e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 131360e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 131460e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 131560e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 131660e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 131760e87ca8SAndrew Thompson return (m); 131860e87ca8SAndrew Thompson } 131960e87ca8SAndrew Thompson 1320fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 132140811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1322