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" 3733553d6eSBjoern A. Zeeb #include "opt_route.h" 3843b29369SRobert Watson #include "opt_mac.h" 394cf49a43SJulian Elischer #include "opt_netgraph.h" 40a9771948SGleb Smirnoff #include "opt_carp.h" 416eeac1d9SJulian Elischer #include "opt_mbuf_profiling.h" 42430df5f4SEivind Eklund 43df8bae1dSRodney W. Grimes #include <sys/param.h> 44df8bae1dSRodney W. Grimes #include <sys/systm.h> 45df8bae1dSRodney W. Grimes #include <sys/kernel.h> 46385195c0SMarko Zec #include <sys/lock.h> 47df8bae1dSRodney W. Grimes #include <sys/malloc.h> 4841ee9f1cSPoul-Henning Kamp #include <sys/module.h> 49df8bae1dSRodney W. Grimes #include <sys/mbuf.h> 5010b1fde0SMark Murray #include <sys/random.h> 51385195c0SMarko Zec #include <sys/rwlock.h> 52df8bae1dSRodney W. Grimes #include <sys/socket.h> 5351a53488SBruce Evans #include <sys/sockio.h> 54602d513cSGarrett Wollman #include <sys/sysctl.h> 55603724d3SBjoern A. Zeeb #include <sys/vimage.h> 56df8bae1dSRodney W. Grimes 57df8bae1dSRodney W. Grimes #include <net/if.h> 58d7647d96SDag-Erling Smørgrav #include <net/if_arp.h> 59df8bae1dSRodney W. Grimes #include <net/netisr.h> 60df8bae1dSRodney W. Grimes #include <net/route.h> 61df8bae1dSRodney W. Grimes #include <net/if_llc.h> 62df8bae1dSRodney W. Grimes #include <net/if_dl.h> 63df8bae1dSRodney W. Grimes #include <net/if_types.h> 642e2de7f2SArchie Cobbs #include <net/bpf.h> 65e1e1452dSArchie Cobbs #include <net/ethernet.h> 66fd6238a6SAndrew Thompson #include <net/if_bridgevar.h> 67c1d93b05SSam Leffler #include <net/if_vlan_var.h> 686e6b3f7cSQing Li #include <net/if_llatbl.h> 6960ee3847SMax Laier #include <net/pf_mtag.h> 704b79449eSBjoern A. Zeeb #include <net/vnet.h> 71df8bae1dSRodney W. Grimes 7282cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 73df8bae1dSRodney W. Grimes #include <netinet/in.h> 74df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 75df8bae1dSRodney W. Grimes #include <netinet/if_ether.h> 764b984093SLuigi Rizzo #include <netinet/ip_fw.h> 774b984093SLuigi Rizzo #include <netinet/ip_dummynet.h> 78385195c0SMarko Zec #include <netinet/vinet.h> 791d5e9e22SEivind Eklund #endif 8082cd038dSYoshinobu Inoue #ifdef INET6 8182cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 8282cd038dSYoshinobu Inoue #endif 83df8bae1dSRodney W. Grimes 84a9771948SGleb Smirnoff #ifdef DEV_CARP 85a9771948SGleb Smirnoff #include <netinet/ip_carp.h> 86a9771948SGleb Smirnoff #endif 87a9771948SGleb Smirnoff 88cc6a66f2SJulian Elischer #ifdef IPX 89cc6a66f2SJulian Elischer #include <netipx/ipx.h> 90cc6a66f2SJulian Elischer #include <netipx/ipx_if.h> 91a1026028SMaxim Sobolev #endif 926e6b3f7cSQing Li 934f93599fSBoris Popov int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m); 945accfb8cSBoris Popov int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp, 952a7e8eceSBoris Popov struct sockaddr *dst, short *tp, int *hlen); 96cc6a66f2SJulian Elischer 97655929bfSJulian Elischer #ifdef NETATALK 98655929bfSJulian Elischer #include <netatalk/at.h> 99655929bfSJulian Elischer #include <netatalk/at_var.h> 100655929bfSJulian Elischer #include <netatalk/at_extern.h> 101655929bfSJulian Elischer 102655929bfSJulian Elischer #define llc_snap_org_code llc_un.type_snap.org_code 103655929bfSJulian Elischer #define llc_snap_ether_type llc_un.type_snap.ether_type 104655929bfSJulian Elischer 105655929bfSJulian Elischer extern u_char at_org_code[3]; 106655929bfSJulian Elischer extern u_char aarp_org_code[3]; 1072cc2df49SGarrett Wollman #endif /* NETATALK */ 1082cc2df49SGarrett Wollman 109aed55708SRobert Watson #include <security/mac/mac_framework.h> 110aed55708SRobert Watson 111d54d93acSEd Maste #ifdef CTASSERT 112d54d93acSEd Maste CTASSERT(sizeof (struct ether_header) == ETHER_ADDR_LEN * 2 + 2); 113d54d93acSEd Maste CTASSERT(sizeof (struct ether_addr) == ETHER_ADDR_LEN); 114d54d93acSEd Maste #endif 115d54d93acSEd Maste 116e1e1452dSArchie Cobbs /* netgraph node hooks for ng_ether(4) */ 117c1d93b05SSam Leffler void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 118c1d93b05SSam Leffler void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 119e1e1452dSArchie Cobbs int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 120e1e1452dSArchie Cobbs void (*ng_ether_attach_p)(struct ifnet *ifp); 121e1e1452dSArchie Cobbs void (*ng_ether_detach_p)(struct ifnet *ifp); 122e1e1452dSArchie Cobbs 123824eb9dcSDavid E. O'Brien void (*vlan_input_p)(struct ifnet *, struct mbuf *); 1249d4fe4b2SBrooks Davis 125fd6238a6SAndrew Thompson /* if_bridge(4) support */ 1268f867517SAndrew Thompson struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *); 1278f867517SAndrew Thompson int (*bridge_output_p)(struct ifnet *, struct mbuf *, 1288f867517SAndrew Thompson struct sockaddr *, struct rtentry *); 129c8b01292SAndrew Thompson void (*bridge_dn_p)(struct mbuf *, struct ifnet *); 1308f867517SAndrew Thompson 13118242d3bSAndrew Thompson /* if_lagg(4) support */ 13218242d3bSAndrew Thompson struct mbuf *(*lagg_input_p)(struct ifnet *, struct mbuf *); 133b47888ceSAndrew Thompson 134e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 135868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 136868d8b62SMatthew N. Dodd 137929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 138929ddbbbSAlfred Perlstein struct sockaddr *); 139868d8b62SMatthew N. Dodd 140fc74a9f9SBrooks Davis /* XXX: should be in an arp support file, not here */ 141fc74a9f9SBrooks Davis MALLOC_DEFINE(M_ARPCOM, "arpcom", "802.* interface internals"); 142fc74a9f9SBrooks Davis 14369462a82SBruce M Simpson #define ETHER_IS_BROADCAST(addr) \ 14469462a82SBruce M Simpson (bcmp(etherbroadcastaddr, (addr), ETHER_ADDR_LEN) == 0) 14569462a82SBruce M Simpson 1464c8e8c05SJulian Elischer #define senderr(e) do { error = (e); goto bad;} while (0) 147df8bae1dSRodney W. Grimes 148d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 1494b984093SLuigi Rizzo int 1504b984093SLuigi Rizzo ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, 151c1d93b05SSam Leffler struct ip_fw **rule, int shared); 15244e33a07SMarko Zec #ifdef VIMAGE_GLOBALS 1534b984093SLuigi Rizzo static int ether_ipfw; 154d7647d96SDag-Erling Smørgrav #endif 15544e33a07SMarko Zec #endif 1564b984093SLuigi Rizzo 1576e6b3f7cSQing Li 158df8bae1dSRodney W. Grimes /* 159df8bae1dSRodney W. Grimes * Ethernet output routine. 160df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 161df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 162df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 163df8bae1dSRodney W. Grimes */ 164df8bae1dSRodney W. Grimes int 16572fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 166279aa3d4SKip Macy struct sockaddr *dst, struct route *ro) 167df8bae1dSRodney W. Grimes { 168df8bae1dSRodney W. Grimes short type; 169279aa3d4SKip Macy int error = 0, hdrcmplt = 0; 17064760eb0SWarner Losh u_char esrc[ETHER_ADDR_LEN], edst[ETHER_ADDR_LEN]; 1716e6b3f7cSQing Li struct llentry *lle = NULL; 172279aa3d4SKip Macy struct rtentry *rt0 = NULL; 173098a8c3bSMatthew N. Dodd struct ether_header *eh; 17460ee3847SMax Laier struct pf_mtag *t; 175c54c76ccSOleg Bulyzhin int loop_copy = 1; 176d32864c3SRobert Watson int hlen; /* link layer header length */ 177df8bae1dSRodney W. Grimes 178279aa3d4SKip Macy if (ro != NULL) { 179279aa3d4SKip Macy lle = ro->ro_lle; 180279aa3d4SKip Macy rt0 = ro->ro_rt; 181279aa3d4SKip Macy } 18243b29369SRobert Watson #ifdef MAC 18330d239bcSRobert Watson error = mac_ifnet_check_transmit(ifp, m); 18443b29369SRobert Watson if (error) 18543b29369SRobert Watson senderr(error); 18643b29369SRobert Watson #endif 18743b29369SRobert Watson 1886eeac1d9SJulian Elischer M_PROFILE(m); 189afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 190afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 19113f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 19213f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 193df8bae1dSRodney W. Grimes senderr(ENETDOWN); 1947f760c48SMatthew N. Dodd 19584dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 196df8bae1dSRodney W. Grimes switch (dst->sa_family) { 197df8bae1dSRodney W. Grimes #ifdef INET 198df8bae1dSRodney W. Grimes case AF_INET: 199279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 200279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 201279aa3d4SKip Macy else 2026e6b3f7cSQing Li error = arpresolve(ifp, rt0, m, dst, edst, &lle); 203cd46a114SLuigi Rizzo if (error) 204cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 20534bed8b0SDavid Greenman type = htons(ETHERTYPE_IP); 206df8bae1dSRodney W. Grimes break; 20743a6c75aSMatthew N. Dodd case AF_ARP: 20843a6c75aSMatthew N. Dodd { 20943a6c75aSMatthew N. Dodd struct arphdr *ah; 21043a6c75aSMatthew N. Dodd ah = mtod(m, struct arphdr *); 21143a6c75aSMatthew N. Dodd ah->ar_hrd = htons(ARPHRD_ETHER); 21243a6c75aSMatthew N. Dodd 213c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 21443a6c75aSMatthew N. Dodd 21543a6c75aSMatthew N. Dodd switch(ntohs(ah->ar_op)) { 21643a6c75aSMatthew N. Dodd case ARPOP_REVREQUEST: 21743a6c75aSMatthew N. Dodd case ARPOP_REVREPLY: 21843a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_REVARP); 21943a6c75aSMatthew N. Dodd break; 22043a6c75aSMatthew N. Dodd case ARPOP_REQUEST: 22143a6c75aSMatthew N. Dodd case ARPOP_REPLY: 22243a6c75aSMatthew N. Dodd default: 22343a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_ARP); 22443a6c75aSMatthew N. Dodd break; 22543a6c75aSMatthew N. Dodd } 22643a6c75aSMatthew N. Dodd 22743a6c75aSMatthew N. Dodd if (m->m_flags & M_BCAST) 22843a6c75aSMatthew N. Dodd bcopy(ifp->if_broadcastaddr, edst, ETHER_ADDR_LEN); 22943a6c75aSMatthew N. Dodd else 23043a6c75aSMatthew N. Dodd bcopy(ar_tha(ah), edst, ETHER_ADDR_LEN); 23143a6c75aSMatthew N. Dodd 23243a6c75aSMatthew N. Dodd } 23343a6c75aSMatthew N. Dodd break; 234df8bae1dSRodney W. Grimes #endif 23582cd038dSYoshinobu Inoue #ifdef INET6 23682cd038dSYoshinobu Inoue case AF_INET6: 237279aa3d4SKip Macy if (lle != NULL && (lle->la_flags & LLE_VALID)) 238279aa3d4SKip Macy memcpy(edst, &lle->ll_addr.mac16, sizeof(edst)); 239279aa3d4SKip Macy else 2409928dafbSQing Li error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle); 241cd46a114SLuigi Rizzo if (error) 242cd46a114SLuigi Rizzo return error; 24382cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 24482cd038dSYoshinobu Inoue break; 24582cd038dSYoshinobu Inoue #endif 246cc6a66f2SJulian Elischer #ifdef IPX 247cc6a66f2SJulian Elischer case AF_IPX: 2484f93599fSBoris Popov if (ef_outputp) { 2492a7e8eceSBoris Popov error = ef_outputp(ifp, &m, dst, &type, &hlen); 2505accfb8cSBoris Popov if (error) 2515accfb8cSBoris Popov goto bad; 2524f93599fSBoris Popov } else 25334bed8b0SDavid Greenman type = htons(ETHERTYPE_IPX); 254cc6a66f2SJulian Elischer bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 255cc6a66f2SJulian Elischer (caddr_t)edst, sizeof (edst)); 256cc6a66f2SJulian Elischer break; 257cc6a66f2SJulian Elischer #endif 258655929bfSJulian Elischer #ifdef NETATALK 259655929bfSJulian Elischer case AF_APPLETALK: 2601d0eab59SJulian Elischer { 261ed7509acSJulian Elischer struct at_ifaddr *aa; 2621d0eab59SJulian Elischer 263cd46a114SLuigi Rizzo if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) 264cd46a114SLuigi Rizzo senderr(EHOSTUNREACH); /* XXX */ 265cd46a114SLuigi Rizzo if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) 2661d0eab59SJulian Elischer return (0); 267655929bfSJulian Elischer /* 268ed7509acSJulian Elischer * In the phase 2 case, need to prepend an mbuf for the llc header. 269655929bfSJulian Elischer */ 270655929bfSJulian Elischer if ( aa->aa_flags & AFA_PHASE2 ) { 271655929bfSJulian Elischer struct llc llc; 272655929bfSJulian Elischer 2737e2041e0SRobert Watson M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); 2742166ffe8SRobert Watson if (m == NULL) 2752166ffe8SRobert Watson senderr(ENOBUFS); 276655929bfSJulian Elischer llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 277655929bfSJulian Elischer llc.llc_control = LLC_UI; 278655929bfSJulian Elischer bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 279655929bfSJulian Elischer llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 280797f247bSMatthew N. Dodd bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 28134bed8b0SDavid Greenman type = htons(m->m_pkthdr.len); 282797f247bSMatthew N. Dodd hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN; 283655929bfSJulian Elischer } else { 28434bed8b0SDavid Greenman type = htons(ETHERTYPE_AT); 285655929bfSJulian Elischer } 286655929bfSJulian Elischer break; 287ed7509acSJulian Elischer } 2888cdfefbdSPeter Wemm #endif /* NETATALK */ 289df8bae1dSRodney W. Grimes 290114ae644SMike Smith case pseudo_AF_HDRCMPLT: 291114ae644SMike Smith hdrcmplt = 1; 292114ae644SMike Smith eh = (struct ether_header *)dst->sa_data; 293114ae644SMike Smith (void)memcpy(esrc, eh->ether_shost, sizeof (esrc)); 294114ae644SMike Smith /* FALLTHROUGH */ 295114ae644SMike Smith 296df8bae1dSRodney W. Grimes case AF_UNSPEC: 297c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 298df8bae1dSRodney W. Grimes eh = (struct ether_header *)dst->sa_data; 29994a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 300df8bae1dSRodney W. Grimes type = eh->ether_type; 301df8bae1dSRodney W. Grimes break; 302df8bae1dSRodney W. Grimes 303df8bae1dSRodney W. Grimes default: 30429e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 305df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 306df8bae1dSRodney W. Grimes } 307df8bae1dSRodney W. Grimes 3086e6b3f7cSQing Li if (lle != NULL && (lle->la_flags & LLE_IFADDR)) { 3096e6b3f7cSQing Li int csum_flags = 0; 3106e6b3f7cSQing Li if (m->m_pkthdr.csum_flags & CSUM_IP) 3116e6b3f7cSQing Li csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 3126e6b3f7cSQing Li if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 3136e6b3f7cSQing Li csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 3142f4afd21SRandall Stewart if (m->m_pkthdr.csum_flags & CSUM_SCTP) 3152f4afd21SRandall Stewart csum_flags |= CSUM_SCTP_VALID; 3166e6b3f7cSQing Li m->m_pkthdr.csum_flags |= csum_flags; 3176e6b3f7cSQing Li m->m_pkthdr.csum_data = 0xffff; 3186e6b3f7cSQing Li return (if_simloop(ifp, m, dst->sa_family, 0)); 3196e6b3f7cSQing Li } 3206e6b3f7cSQing Li 321df8bae1dSRodney W. Grimes /* 322df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 323df8bae1dSRodney W. Grimes * allocate another. 324df8bae1dSRodney W. Grimes */ 325797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 3262166ffe8SRobert Watson if (m == NULL) 327df8bae1dSRodney W. Grimes senderr(ENOBUFS); 328df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 32994a5d9b6SDavid Greenman (void)memcpy(&eh->ether_type, &type, 330df8bae1dSRodney W. Grimes sizeof(eh->ether_type)); 33194a5d9b6SDavid Greenman (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); 332114ae644SMike Smith if (hdrcmplt) 333114ae644SMike Smith (void)memcpy(eh->ether_shost, esrc, 334114ae644SMike Smith sizeof(eh->ether_shost)); 335114ae644SMike Smith else 3364a0d6638SRuslan Ermilov (void)memcpy(eh->ether_shost, IF_LLADDR(ifp), 337df8bae1dSRodney W. Grimes sizeof(eh->ether_shost)); 338ed7509acSJulian Elischer 339ed7509acSJulian Elischer /* 340ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 341ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 342ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 343ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 344ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 345ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 346ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 347ed7509acSJulian Elischer */ 348c54c76ccSOleg Bulyzhin if ((ifp->if_flags & IFF_SIMPLEX) && loop_copy && 34960ee3847SMax Laier ((t = pf_find_mtag(m)) == NULL || !t->routed)) { 3503cd67511SJesper Skriver int csum_flags = 0; 3513cd67511SJesper Skriver 3523cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_IP) 3533cd67511SJesper Skriver csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 3543cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 3553cd67511SJesper Skriver csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 3562f4afd21SRandall Stewart if (m->m_pkthdr.csum_flags & CSUM_SCTP) 3572f4afd21SRandall Stewart csum_flags |= CSUM_SCTP_VALID; 35806f684b0SMatthew N. Dodd 359c54c76ccSOleg Bulyzhin if (m->m_flags & M_BCAST) { 36006f684b0SMatthew N. Dodd struct mbuf *n; 361ed7509acSJulian Elischer 362294dd290SLuigi Rizzo /* 363294dd290SLuigi Rizzo * Because if_simloop() modifies the packet, we need a 364294dd290SLuigi Rizzo * writable copy through m_dup() instead of a readonly 365294dd290SLuigi Rizzo * one as m_copy[m] would give us. The alternative would 366294dd290SLuigi Rizzo * be to modify if_simloop() to handle the readonly mbuf, 367294dd290SLuigi Rizzo * but performancewise it is mostly equivalent (trading 368294dd290SLuigi Rizzo * extra data copying vs. extra locking). 3699983b3c0SYaroslav Tykhiy * 3709983b3c0SYaroslav Tykhiy * XXX This is a local workaround. A number of less 3719983b3c0SYaroslav Tykhiy * often used kernel parts suffer from the same bug. 3729983b3c0SYaroslav Tykhiy * See PR kern/105943 for a proposed general solution. 373294dd290SLuigi Rizzo */ 374294dd290SLuigi Rizzo if ((n = m_dup(m, M_DONTWAIT)) != NULL) { 3753cd67511SJesper Skriver n->m_pkthdr.csum_flags |= csum_flags; 3763cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3773cd67511SJesper Skriver n->m_pkthdr.csum_data = 0xffff; 37806a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 379c1404dc0SArchie Cobbs } else 380c1404dc0SArchie Cobbs ifp->if_iqdrops++; 38106f684b0SMatthew N. Dodd } else if (bcmp(eh->ether_dhost, eh->ether_shost, 38206f684b0SMatthew N. Dodd ETHER_ADDR_LEN) == 0) { 3833cd67511SJesper Skriver m->m_pkthdr.csum_flags |= csum_flags; 3843cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3853cd67511SJesper Skriver m->m_pkthdr.csum_data = 0xffff; 38606a429a3SArchie Cobbs (void) if_simloop(ifp, m, dst->sa_family, hlen); 387ed7509acSJulian Elischer return (0); /* XXX */ 388ed7509acSJulian Elischer } 389ed7509acSJulian Elischer } 3902e2de7f2SArchie Cobbs 3913f7d1396SAndrew Thompson /* 3923f7d1396SAndrew Thompson * Bridges require special output handling. 3933f7d1396SAndrew Thompson */ 3943f7d1396SAndrew Thompson if (ifp->if_bridge) { 3953f7d1396SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 3963f7d1396SAndrew Thompson return (error); 3973f7d1396SAndrew Thompson } 3983f7d1396SAndrew Thompson 399a9771948SGleb Smirnoff #ifdef DEV_CARP 400a9771948SGleb Smirnoff if (ifp->if_carp && 401a9771948SGleb Smirnoff (error = carp_output(ifp, m, dst, NULL))) 402a9771948SGleb Smirnoff goto bad; 403a9771948SGleb Smirnoff #endif 404a9771948SGleb Smirnoff 405e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 406eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 407514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 408514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 409e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 410e1e1452dSArchie Cobbs bad: if (m != NULL) 411e1e1452dSArchie Cobbs m_freem(m); 412e1e1452dSArchie Cobbs return (error); 413e1e1452dSArchie Cobbs } 414e1e1452dSArchie Cobbs if (m == NULL) 415e1e1452dSArchie Cobbs return (0); 416e1e1452dSArchie Cobbs } 417e1e1452dSArchie Cobbs 418e1e1452dSArchie Cobbs /* Continue with link-layer output */ 419e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 420e1e1452dSArchie Cobbs } 421e1e1452dSArchie Cobbs 422e1e1452dSArchie Cobbs /* 423e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 424e1e1452dSArchie Cobbs * 425e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 426e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 427e1e1452dSArchie Cobbs */ 428e1e1452dSArchie Cobbs int 429c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 430e1e1452dSArchie Cobbs { 431d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 4328b615593SMarko Zec INIT_VNET_NET(ifp->if_vnet); 433ac9d7e26SMax Laier struct ip_fw *rule = ip_dn_claim_rule(m); 4342b25acc1SLuigi Rizzo 435603724d3SBjoern A. Zeeb if (IPFW_LOADED && V_ether_ipfw != 0) { 436c1d93b05SSam Leffler if (ether_ipfw_chk(&m, ifp, &rule, 0) == 0) { 4374b984093SLuigi Rizzo if (m) { 4384b984093SLuigi Rizzo m_freem(m); 439e7909401SDavid Malone return EACCES; /* pkt dropped */ 4404b984093SLuigi Rizzo } else 4414b984093SLuigi Rizzo return 0; /* consumed e.g. in a pipe */ 4424b984093SLuigi Rizzo } 4434b984093SLuigi Rizzo } 444d7647d96SDag-Erling Smørgrav #endif 4452b25acc1SLuigi Rizzo 446df8bae1dSRodney W. Grimes /* 447df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 448df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 449df8bae1dSRodney W. Grimes */ 450aea78d20SKip Macy return ((ifp->if_transmit)(ifp, m)); 451df8bae1dSRodney W. Grimes } 452df8bae1dSRodney W. Grimes 453d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 454df8bae1dSRodney W. Grimes /* 4554b984093SLuigi Rizzo * ipfw processing for ethernet packets (in and out). 4564b984093SLuigi Rizzo * The second parameter is NULL from ether_demux, and ifp from 457b6de9e91SMax Laier * ether_output_frame. 4584b984093SLuigi Rizzo */ 4594b984093SLuigi Rizzo int 4604b984093SLuigi Rizzo ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, 461c1d93b05SSam Leffler struct ip_fw **rule, int shared) 4624b984093SLuigi Rizzo { 463385195c0SMarko Zec INIT_VNET_INET(dst->if_vnet); 464c1d93b05SSam Leffler struct ether_header *eh; 465c1d93b05SSam Leffler struct ether_header save_eh; 466c1d93b05SSam Leffler struct mbuf *m; 4674b984093SLuigi Rizzo int i; 4682b25acc1SLuigi Rizzo struct ip_fw_args args; 4694b984093SLuigi Rizzo 470603724d3SBjoern A. Zeeb if (*rule != NULL && V_fw_one_pass) 471015d72e0SLuigi Rizzo return 1; /* dummynet packet, already partially processed */ 4722f8ebbf4SLuigi Rizzo 4734b984093SLuigi Rizzo /* 4742f8ebbf4SLuigi Rizzo * I need some amt of data to be contiguous, and in case others need 4754b984093SLuigi Rizzo * the packet (shared==1) also better be in the first mbuf. 4764b984093SLuigi Rizzo */ 477c1d93b05SSam Leffler m = *m0; 478c1d93b05SSam Leffler i = min( m->m_pkthdr.len, max_protohdr); 479c1d93b05SSam Leffler if ( shared || m->m_len < i) { 480c1d93b05SSam Leffler m = m_pullup(m, i); 481c1d93b05SSam Leffler if (m == NULL) { 482c1d93b05SSam Leffler *m0 = m; 4834b984093SLuigi Rizzo return 0; 4844b984093SLuigi Rizzo } 485c1d93b05SSam Leffler } 486c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 487c1d93b05SSam Leffler save_eh = *eh; /* save copy for restore below */ 488c1d93b05SSam Leffler m_adj(m, ETHER_HDR_LEN); /* strip ethernet header */ 4894b984093SLuigi Rizzo 490c1d93b05SSam Leffler args.m = m; /* the packet we are looking at */ 4912b25acc1SLuigi Rizzo args.oif = dst; /* destination, if any */ 4922b25acc1SLuigi Rizzo args.rule = *rule; /* matching rule to restart */ 4932b25acc1SLuigi Rizzo args.next_hop = NULL; /* we do not support forward yet */ 4942b25acc1SLuigi Rizzo args.eh = &save_eh; /* MAC header for bridged/MAC packets */ 4953ecf1851SOleg Bulyzhin args.inp = NULL; /* used by ipfw uid/gid/jail rules */ 4962b25acc1SLuigi Rizzo i = ip_fw_chk_ptr(&args); 497c1d93b05SSam Leffler m = args.m; 498c1d93b05SSam Leffler if (m != NULL) { 499c1d93b05SSam Leffler /* 500c1d93b05SSam Leffler * Restore Ethernet header, as needed, in case the 501c1d93b05SSam Leffler * mbuf chain was replaced by ipfw. 502c1d93b05SSam Leffler */ 503a163d034SWarner Losh M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 504c1d93b05SSam Leffler if (m == NULL) { 505c1d93b05SSam Leffler *m0 = m; 506c1d93b05SSam Leffler return 0; 507c1d93b05SSam Leffler } 508c1d93b05SSam Leffler if (eh != mtod(m, struct ether_header *)) 509c1d93b05SSam Leffler bcopy(&save_eh, mtod(m, struct ether_header *), 510c1d93b05SSam Leffler ETHER_HDR_LEN); 511c1d93b05SSam Leffler } 512c1d93b05SSam Leffler *m0 = m; 5132b25acc1SLuigi Rizzo *rule = args.rule; 5142b25acc1SLuigi Rizzo 5156c69a7c3SGleb Smirnoff if (i == IP_FW_DENY) /* drop */ 5164b984093SLuigi Rizzo return 0; 5174b984093SLuigi Rizzo 5186c69a7c3SGleb Smirnoff KASSERT(m != NULL, ("ether_ipfw_chk: m is NULL")); 5196c69a7c3SGleb Smirnoff 5206c69a7c3SGleb Smirnoff if (i == IP_FW_PASS) /* a PASS rule. */ 5214b984093SLuigi Rizzo return 1; 5224b984093SLuigi Rizzo 5236c69a7c3SGleb Smirnoff if (DUMMYNET_LOADED && (i == IP_FW_DUMMYNET)) { 5244b984093SLuigi Rizzo /* 5254b984093SLuigi Rizzo * Pass the pkt to dummynet, which consumes it. 5264b984093SLuigi Rizzo * If shared, make a copy and keep the original. 5274b984093SLuigi Rizzo */ 5284b984093SLuigi Rizzo if (shared) { 529a163d034SWarner Losh m = m_copypacket(m, M_DONTWAIT); 5302b25acc1SLuigi Rizzo if (m == NULL) 5314b984093SLuigi Rizzo return 0; 5324b984093SLuigi Rizzo } else { 5332b25acc1SLuigi Rizzo /* 534c1d93b05SSam Leffler * Pass the original to dummynet and 535c1d93b05SSam Leffler * nothing back to the caller 5362b25acc1SLuigi Rizzo */ 537c1d93b05SSam Leffler *m0 = NULL ; 5384b984093SLuigi Rizzo } 539897c0f57SOleg Bulyzhin ip_dn_io_ptr(&m, dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args); 5404b984093SLuigi Rizzo return 0; 5414b984093SLuigi Rizzo } 5424b984093SLuigi Rizzo /* 5432f8ebbf4SLuigi Rizzo * XXX at some point add support for divert/forward actions. 5442f8ebbf4SLuigi Rizzo * If none of the above matches, we have to drop the pkt. 5454b984093SLuigi Rizzo */ 5464b984093SLuigi Rizzo return 0; 5474b984093SLuigi Rizzo } 548d7647d96SDag-Erling Smørgrav #endif 5494b984093SLuigi Rizzo 5504b984093SLuigi Rizzo /* 551c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 552c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 553df8bae1dSRodney W. Grimes */ 554c1d93b05SSam Leffler static void 555c1d93b05SSam Leffler ether_input(struct ifnet *ifp, struct mbuf *m) 556df8bae1dSRodney W. Grimes { 557c1d93b05SSam Leffler struct ether_header *eh; 558c1d93b05SSam Leffler u_short etype; 559df8bae1dSRodney W. Grimes 56069462a82SBruce M Simpson if ((ifp->if_flags & IFF_UP) == 0) { 56169462a82SBruce M Simpson m_freem(m); 56269462a82SBruce M Simpson return; 56369462a82SBruce M Simpson } 56469462a82SBruce M Simpson #ifdef DIAGNOSTIC 56569462a82SBruce M Simpson if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 56669462a82SBruce M Simpson if_printf(ifp, "discard frame at !IFF_DRV_RUNNING\n"); 56769462a82SBruce M Simpson m_freem(m); 56869462a82SBruce M Simpson return; 56969462a82SBruce M Simpson } 57069462a82SBruce M Simpson #endif 571c1d93b05SSam Leffler /* 572c1d93b05SSam Leffler * Do consistency checks to verify assumptions 573c1d93b05SSam Leffler * made by code past this point. 574c1d93b05SSam Leffler */ 575c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 576c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 577c1d93b05SSam Leffler ifp->if_ierrors++; 578c939f1aeSLuigi Rizzo m_freem(m); 579c939f1aeSLuigi Rizzo return; 580c939f1aeSLuigi Rizzo } 581797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 582c1d93b05SSam Leffler /* XXX maybe should pullup? */ 583c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 584c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 585c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 586c1d93b05SSam Leffler ifp->if_ierrors++; 587c1d93b05SSam Leffler m_freem(m); 588c1d93b05SSam Leffler return; 5892e2de7f2SArchie Cobbs } 590c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 591c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 592c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 593c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 594c1d93b05SSam Leffler ifp->if_ierrors++; 595c1d93b05SSam Leffler m_freem(m); 596c1d93b05SSam Leffler return; 597c1d93b05SSam Leffler } 598c1d93b05SSam Leffler #ifdef DIAGNOSTIC 599c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 6009bf40edeSBrooks Davis if_printf(ifp, "Warning, frame marked as received on %s\n", 6019bf40edeSBrooks Davis m->m_pkthdr.rcvif->if_xname); 602c1d93b05SSam Leffler } 603c1d93b05SSam Leffler #endif 604c1d93b05SSam Leffler 60569462a82SBruce M Simpson if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 60669462a82SBruce M Simpson if (ETHER_IS_BROADCAST(eh->ether_dhost)) 60769462a82SBruce M Simpson m->m_flags |= M_BCAST; 60869462a82SBruce M Simpson else 60969462a82SBruce M Simpson m->m_flags |= M_MCAST; 61069462a82SBruce M Simpson ifp->if_imcasts++; 61169462a82SBruce M Simpson } 61269462a82SBruce M Simpson 613533d8562SRobert Watson #ifdef MAC 614533d8562SRobert Watson /* 615533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 616533d8562SRobert Watson * consumers can get to it. 617533d8562SRobert Watson */ 61830d239bcSRobert Watson mac_ifnet_create_mbuf(ifp, m); 619533d8562SRobert Watson #endif 620533d8562SRobert Watson 621c1d93b05SSam Leffler /* 62269462a82SBruce M Simpson * Give bpf a chance at the packet. 623c1d93b05SSam Leffler */ 624d05d4616SChristian S.J. Peron ETHER_BPF_MTAP(ifp, m); 6252e2de7f2SArchie Cobbs 62669462a82SBruce M Simpson /* 62769462a82SBruce M Simpson * If the CRC is still on the packet, trim it off. We do this once 62869462a82SBruce M Simpson * and once only in case we are re-entered. Nothing else on the 62969462a82SBruce M Simpson * Ethernet receive path expects to see the FCS. 63069462a82SBruce M Simpson */ 631c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 632c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 633c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 634c1d93b05SSam Leffler } 635c1d93b05SSam Leffler 636c1d93b05SSam Leffler ifp->if_ibytes += m->m_pkthdr.len; 63705463bb5SDavid Greenman 63869462a82SBruce M Simpson /* Allow monitor mode to claim this frame, after stats are updated. */ 639de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 640de572b37SChristian S.J. Peron m_freem(m); 641de572b37SChristian S.J. Peron return; 642de572b37SChristian S.J. Peron } 643de572b37SChristian S.J. Peron 64418242d3bSAndrew Thompson /* Handle input from a lagg(4) port */ 645b47888ceSAndrew Thompson if (ifp->if_type == IFT_IEEE8023ADLAG) { 64618242d3bSAndrew Thompson KASSERT(lagg_input_p != NULL, 64718242d3bSAndrew Thompson ("%s: if_lagg not loaded!", __func__)); 64818242d3bSAndrew Thompson m = (*lagg_input_p)(ifp, m); 649b47888ceSAndrew Thompson if (m != NULL) 650b47888ceSAndrew Thompson ifp = m->m_pkthdr.rcvif; 651b47888ceSAndrew Thompson else 652b47888ceSAndrew Thompson return; 653b47888ceSAndrew Thompson } 654b47888ceSAndrew Thompson 65569462a82SBruce M Simpson /* 65669462a82SBruce M Simpson * If the hardware did not process an 802.1Q tag, do this now, 65769462a82SBruce M Simpson * to allow 802.1P priority frames to be passed to the main input 65869462a82SBruce M Simpson * path correctly. 65969462a82SBruce M Simpson * TODO: Deal with Q-in-Q frames, but not arbitrary nesting levels. 66069462a82SBruce M Simpson */ 66169462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_VLAN) { 66269462a82SBruce M Simpson struct ether_vlan_header *evl; 66369462a82SBruce M Simpson 66469462a82SBruce M Simpson if (m->m_len < sizeof(*evl) && 66569462a82SBruce M Simpson (m = m_pullup(m, sizeof(*evl))) == NULL) { 666402d5e27SBruce M Simpson #ifdef DIAGNOSTIC 66769462a82SBruce M Simpson if_printf(ifp, "cannot pullup VLAN header\n"); 668402d5e27SBruce M Simpson #endif 66969462a82SBruce M Simpson ifp->if_ierrors++; 67069462a82SBruce M Simpson m_freem(m); 67169462a82SBruce M Simpson return; 67269462a82SBruce M Simpson } 67369462a82SBruce M Simpson 67469462a82SBruce M Simpson evl = mtod(m, struct ether_vlan_header *); 67569462a82SBruce M Simpson m->m_pkthdr.ether_vtag = ntohs(evl->evl_tag); 67669462a82SBruce M Simpson m->m_flags |= M_VLANTAG; 67769462a82SBruce M Simpson 67869462a82SBruce M Simpson bcopy((char *)evl, (char *)evl + ETHER_VLAN_ENCAP_LEN, 67969462a82SBruce M Simpson ETHER_HDR_LEN - ETHER_TYPE_LEN); 68069462a82SBruce M Simpson m_adj(m, ETHER_VLAN_ENCAP_LEN); 68169462a82SBruce M Simpson } 68269462a82SBruce M Simpson 68369462a82SBruce M Simpson /* Allow ng_ether(4) to claim this frame. */ 684eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 685514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 68669462a82SBruce M Simpson ("%s: ng_ether_input_p is NULL", __func__)); 68769462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 688c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 689e1e1452dSArchie Cobbs if (m == NULL) 690e1e1452dSArchie Cobbs return; 691e1e1452dSArchie Cobbs } 692e1e1452dSArchie Cobbs 6938f867517SAndrew Thompson /* 69469462a82SBruce M Simpson * Allow if_bridge(4) to claim this frame. 69569462a82SBruce M Simpson * The BRIDGE_INPUT() macro will update ifp if the bridge changed it 69669462a82SBruce M Simpson * and the frame should be delivered locally. 6978f867517SAndrew Thompson */ 69869462a82SBruce M Simpson if (ifp->if_bridge != NULL) { 69969462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 700fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 7018f867517SAndrew Thompson if (m == NULL) 7028f867517SAndrew Thompson return; 7038f867517SAndrew Thompson } 7048f867517SAndrew Thompson 70569462a82SBruce M Simpson #ifdef DEV_CARP 70669462a82SBruce M Simpson /* 70769462a82SBruce M Simpson * Clear M_PROMISC on frame so that carp(4) will see it when the 70869462a82SBruce M Simpson * mbuf flows up to Layer 3. 70969462a82SBruce M Simpson * FreeBSD's implementation of carp(4) uses the inprotosw 71069462a82SBruce M Simpson * to dispatch IPPROTO_CARP. carp(4) also allocates its own 71169462a82SBruce M Simpson * Ethernet addresses of the form 00:00:5e:00:01:xx, which 71269462a82SBruce M Simpson * is outside the scope of the M_PROMISC test below. 71369462a82SBruce M Simpson * TODO: Maintain a hash table of ethernet addresses other than 71469462a82SBruce M Simpson * ether_dhost which may be active on this ifp. 71569462a82SBruce M Simpson */ 71669462a82SBruce M Simpson if (ifp->if_carp && carp_forus(ifp->if_carp, eh->ether_dhost)) { 71769462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 71869462a82SBruce M Simpson } else 71969462a82SBruce M Simpson #endif 72069462a82SBruce M Simpson { 72169462a82SBruce M Simpson /* 722e7f8c833SBruce M Simpson * If the frame received was not for our MAC address, set the 72369462a82SBruce M Simpson * M_PROMISC flag on the mbuf chain. The frame may need to 72469462a82SBruce M Simpson * be seen by the rest of the Ethernet input path in case of 72569462a82SBruce M Simpson * re-entry (e.g. bridge, vlan, netgraph) but should not be 72669462a82SBruce M Simpson * seen by upper protocol layers. 72769462a82SBruce M Simpson */ 72869462a82SBruce M Simpson if (!ETHER_IS_MULTICAST(eh->ether_dhost) && 729e7f8c833SBruce M Simpson bcmp(IF_LLADDR(ifp), eh->ether_dhost, ETHER_ADDR_LEN) != 0) 73069462a82SBruce M Simpson m->m_flags |= M_PROMISC; 73169462a82SBruce M Simpson } 73269462a82SBruce M Simpson 733a6ddbff0SPoul-Henning Kamp /* First chunk of an mbuf contains good entropy */ 73410b1fde0SMark Murray if (harvest.ethernet) 73510b1fde0SMark Murray random_harvest(m, 16, 3, 0, RANDOM_NET); 73669462a82SBruce M Simpson 737acf032f5SRobert Watson ether_demux(ifp, m); 738e1e1452dSArchie Cobbs } 739e1e1452dSArchie Cobbs 740e1e1452dSArchie Cobbs /* 741e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 742e1e1452dSArchie Cobbs */ 743e1e1452dSArchie Cobbs void 744c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 745e1e1452dSArchie Cobbs { 746c1d93b05SSam Leffler struct ether_header *eh; 7471cafed39SJonathan Lemon int isr; 748e1e1452dSArchie Cobbs u_short ether_type; 749e1e1452dSArchie Cobbs #if defined(NETATALK) 750098a8c3bSMatthew N. Dodd struct llc *l; 751e1e1452dSArchie Cobbs #endif 75269462a82SBruce M Simpson 75369462a82SBruce M Simpson KASSERT(ifp != NULL, ("%s: NULL interface pointer", __func__)); 75469462a82SBruce M Simpson 755d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 7568b615593SMarko Zec INIT_VNET_NET(ifp->if_vnet); 75769462a82SBruce M Simpson /* 75869462a82SBruce M Simpson * Allow dummynet and/or ipfw to claim the frame. 75969462a82SBruce M Simpson * Do not do this for PROMISC frames in case we are re-entered. 76069462a82SBruce M Simpson */ 761603724d3SBjoern A. Zeeb if (IPFW_LOADED && V_ether_ipfw != 0 && !(m->m_flags & M_PROMISC)) { 762ac9d7e26SMax Laier struct ip_fw *rule = ip_dn_claim_rule(m); 76369462a82SBruce M Simpson 76469462a82SBruce M Simpson if (ether_ipfw_chk(&m, NULL, &rule, 0) == 0) { 76569462a82SBruce M Simpson if (m) 76669462a82SBruce M Simpson m_freem(m); /* dropped; free mbuf chain */ 76769462a82SBruce M Simpson return; /* consumed */ 76869462a82SBruce M Simpson } 76969462a82SBruce M Simpson } 770d7647d96SDag-Erling Smørgrav #endif 771c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 772cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 773c1d93b05SSam Leffler 774a9771948SGleb Smirnoff /* 77569462a82SBruce M Simpson * If this frame has a VLAN tag other than 0, call vlan_input() 77669462a82SBruce M Simpson * if its module is loaded. Otherwise, drop. 777a9771948SGleb Smirnoff */ 77869462a82SBruce M Simpson if ((m->m_flags & M_VLANTAG) && 77969462a82SBruce M Simpson EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != 0) { 78075ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 7816c23e6ccSRuslan Ermilov ifp->if_noproto++; 7826c23e6ccSRuslan Ermilov m_freem(m); 7836c23e6ccSRuslan Ermilov return; 7846c23e6ccSRuslan Ermilov } 78569462a82SBruce M Simpson KASSERT(vlan_input_p != NULL,("%s: VLAN not loaded!", 78669462a82SBruce M Simpson __func__)); 78769462a82SBruce M Simpson /* Clear before possibly re-entering ether_input(). */ 78869462a82SBruce M Simpson m->m_flags &= ~M_PROMISC; 789c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 790c1d93b05SSam Leffler return; 791c1d93b05SSam Leffler } 792c1d93b05SSam Leffler 793c1d93b05SSam Leffler /* 79469462a82SBruce M Simpson * Pass promiscuously received frames to the upper layer if the user 79569462a82SBruce M Simpson * requested this by setting IFF_PPROMISC. Otherwise, drop them. 796c1d93b05SSam Leffler */ 79769462a82SBruce M Simpson if ((ifp->if_flags & IFF_PPROMISC) == 0 && (m->m_flags & M_PROMISC)) { 798c1d93b05SSam Leffler m_freem(m); 799c1d93b05SSam Leffler return; 800c1d93b05SSam Leffler } 801c1d93b05SSam Leffler 80269462a82SBruce M Simpson /* 80369462a82SBruce M Simpson * Reset layer specific mbuf flags to avoid confusing upper layers. 80469462a82SBruce M Simpson * Strip off Ethernet header. 80569462a82SBruce M Simpson */ 80669462a82SBruce M Simpson m->m_flags &= ~M_VLANTAG; 80769462a82SBruce M Simpson m->m_flags &= ~(M_PROTOFLAGS); 808797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 809c1d93b05SSam Leffler 81069462a82SBruce M Simpson /* 81169462a82SBruce M Simpson * Dispatch frame to upper layer. 81269462a82SBruce M Simpson */ 813307d80beSDavid Greenman switch (ether_type) { 814df8bae1dSRodney W. Grimes #ifdef INET 815df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 8165d691e6dSAndre Oppermann if ((m = ip_fastforward(m)) == NULL) 8171f91d8c5SDavid Greenman return; 8181cafed39SJonathan Lemon isr = NETISR_IP; 819df8bae1dSRodney W. Grimes break; 820df8bae1dSRodney W. Grimes 821df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 82208aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 82308aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 82408aadfbbSJonathan Lemon m_freem(m); 82508aadfbbSJonathan Lemon return; 82608aadfbbSJonathan Lemon } 8271cafed39SJonathan Lemon isr = NETISR_ARP; 828df8bae1dSRodney W. Grimes break; 829df8bae1dSRodney W. Grimes #endif 830cc6a66f2SJulian Elischer #ifdef IPX 831cc6a66f2SJulian Elischer case ETHERTYPE_IPX: 8324f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 8334f93599fSBoris Popov return; 8341cafed39SJonathan Lemon isr = NETISR_IPX; 835cc6a66f2SJulian Elischer break; 836cc6a66f2SJulian Elischer #endif 83782cd038dSYoshinobu Inoue #ifdef INET6 83882cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 8391cafed39SJonathan Lemon isr = NETISR_IPV6; 84082cd038dSYoshinobu Inoue break; 84182cd038dSYoshinobu Inoue #endif 842655929bfSJulian Elischer #ifdef NETATALK 843655929bfSJulian Elischer case ETHERTYPE_AT: 8441cafed39SJonathan Lemon isr = NETISR_ATALK1; 845655929bfSJulian Elischer break; 846655929bfSJulian Elischer case ETHERTYPE_AARP: 8471cafed39SJonathan Lemon isr = NETISR_AARP; 8481cafed39SJonathan Lemon break; 8498cdfefbdSPeter Wemm #endif /* NETATALK */ 850df8bae1dSRodney W. Grimes default: 8514f93599fSBoris Popov #ifdef IPX 8524f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 8534f93599fSBoris Popov return; 8544f93599fSBoris Popov #endif /* IPX */ 855242c5536SPeter Wemm #if defined(NETATALK) 856307d80beSDavid Greenman if (ether_type > ETHERMTU) 857c1d93b05SSam Leffler goto discard; 858df8bae1dSRodney W. Grimes l = mtod(m, struct llc *); 8591cafed39SJonathan Lemon if (l->llc_dsap == LLC_SNAP_LSAP && 8601cafed39SJonathan Lemon l->llc_ssap == LLC_SNAP_LSAP && 8611cafed39SJonathan Lemon l->llc_control == LLC_UI) { 8624158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], at_org_code, 863655929bfSJulian Elischer sizeof(at_org_code)) == 0 && 864655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 865797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8661cafed39SJonathan Lemon isr = NETISR_ATALK2; 867655929bfSJulian Elischer break; 868655929bfSJulian Elischer } 8694158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 870655929bfSJulian Elischer sizeof(aarp_org_code)) == 0 && 871655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 872797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8731cafed39SJonathan Lemon isr = NETISR_AARP; 874655929bfSJulian Elischer break; 875df8bae1dSRodney W. Grimes } 8761cafed39SJonathan Lemon } 877242c5536SPeter Wemm #endif /* NETATALK */ 8781cafed39SJonathan Lemon goto discard; 879df8bae1dSRodney W. Grimes } 8801cafed39SJonathan Lemon netisr_dispatch(isr, m); 881c1d93b05SSam Leffler return; 8821cafed39SJonathan Lemon 883c1d93b05SSam Leffler discard: 884c1d93b05SSam Leffler /* 885c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 886c1d93b05SSam Leffler * hand the packet to it for last chance processing; 887c1d93b05SSam Leffler * otherwise dispose of it. 888c1d93b05SSam Leffler */ 889eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 890514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 891514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 892c1d93b05SSam Leffler /* 893c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 894c1d93b05SSam Leffler * consistent view of inbound packets. 895c1d93b05SSam Leffler */ 896797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 897c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 898c1d93b05SSam Leffler return; 899c1d93b05SSam Leffler } 900c1d93b05SSam Leffler m_freem(m); 901c1d93b05SSam Leffler } 902c1d93b05SSam Leffler 903c1d93b05SSam Leffler /* 904c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 905c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 906c1d93b05SSam Leffler * 907c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 908c1d93b05SSam Leffler * 909c1d93b05SSam Leffler * since there's no static buffer involved. 910c1d93b05SSam Leffler */ 911c1d93b05SSam Leffler char * 912c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 913c1d93b05SSam Leffler { 914c1d93b05SSam Leffler static char etherbuf[18]; 915c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 916c1d93b05SSam Leffler return (etherbuf); 917df8bae1dSRodney W. Grimes } 918df8bae1dSRodney W. Grimes 919df8bae1dSRodney W. Grimes /* 920df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 921df8bae1dSRodney W. Grimes */ 922df8bae1dSRodney W. Grimes void 923d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 924df8bae1dSRodney W. Grimes { 925f93dfa28SBrooks Davis int i; 926098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 927098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 928df8bae1dSRodney W. Grimes 929c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 930c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 931cfeff1b6SJonathan Lemon if_attach(ifp); 932df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 933c1d93b05SSam Leffler ifp->if_output = ether_output; 934c1d93b05SSam Leffler ifp->if_input = ether_input; 9351158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 936a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 937c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 938322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 939c1d93b05SSam Leffler 9404a0d6638SRuslan Ermilov ifa = ifp->if_addr; 9416e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 94259562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 943df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 944df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 945d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 946c1d93b05SSam Leffler 947797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 948e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 949e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 950e3bbbec2SMatthew N. Dodd 951f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 952f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 953d09ed26fSRuslan Ermilov if (lla[i] != 0) 954f93dfa28SBrooks Davis break; 955f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 956d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 957e1e1452dSArchie Cobbs } 958e1e1452dSArchie Cobbs 95921b8ebd9SArchie Cobbs /* 96021b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 96121b8ebd9SArchie Cobbs */ 96221b8ebd9SArchie Cobbs void 963c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 96421b8ebd9SArchie Cobbs { 965514bcb89SPoul-Henning Kamp if (IFP2AC(ifp)->ac_netgraph != NULL) { 966514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 967514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 96821b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 969514bcb89SPoul-Henning Kamp } 97020a65f37SAndrew Thompson 97121b8ebd9SArchie Cobbs bpfdetach(ifp); 97221b8ebd9SArchie Cobbs if_detach(ifp); 97321b8ebd9SArchie Cobbs } 97421b8ebd9SArchie Cobbs 975ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 976602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 977d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 9788b615593SMarko Zec SYSCTL_V_INT(V_NET, vnet_net, _net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW, 9798b615593SMarko Zec ether_ipfw, 0, "Pass ether pkts through firewall"); 980d7647d96SDag-Erling Smørgrav #endif 98130106f6aSPoul-Henning Kamp 98216b4a343SChristian Weisgerber #if 0 98316b4a343SChristian Weisgerber /* 98416b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 98516b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 98616b4a343SChristian Weisgerber * than the double-loop. 98716b4a343SChristian Weisgerber */ 98816b4a343SChristian Weisgerber uint32_t 98916b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 99016b4a343SChristian Weisgerber { 99116b4a343SChristian Weisgerber size_t i; 99216b4a343SChristian Weisgerber uint32_t crc; 99316b4a343SChristian Weisgerber int bit; 99416b4a343SChristian Weisgerber uint8_t data; 99516b4a343SChristian Weisgerber 99616b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 99716b4a343SChristian Weisgerber 99816b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 999933dad75SAntoine Brodin for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 100016b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 100116b4a343SChristian Weisgerber crc >>= 1; 100216b4a343SChristian Weisgerber if (carry) 100316b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 100416b4a343SChristian Weisgerber } 1005933dad75SAntoine Brodin } 100616b4a343SChristian Weisgerber 100716b4a343SChristian Weisgerber return (crc); 100816b4a343SChristian Weisgerber } 100916b4a343SChristian Weisgerber #else 101016b4a343SChristian Weisgerber uint32_t 101116b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 101216b4a343SChristian Weisgerber { 101316b4a343SChristian Weisgerber static const uint32_t crctab[] = { 101416b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 101516b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 101616b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 101716b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 101816b4a343SChristian Weisgerber }; 101916b4a343SChristian Weisgerber size_t i; 102016b4a343SChristian Weisgerber uint32_t crc; 102116b4a343SChristian Weisgerber 102216b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 102316b4a343SChristian Weisgerber 102416b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 102516b4a343SChristian Weisgerber crc ^= buf[i]; 102616b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 102716b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 102816b4a343SChristian Weisgerber } 102916b4a343SChristian Weisgerber 103016b4a343SChristian Weisgerber return (crc); 103116b4a343SChristian Weisgerber } 103216b4a343SChristian Weisgerber #endif 103316b4a343SChristian Weisgerber 103416b4a343SChristian Weisgerber uint32_t 103516b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 103616b4a343SChristian Weisgerber { 103716b4a343SChristian Weisgerber size_t i; 103816b4a343SChristian Weisgerber uint32_t crc, carry; 103916b4a343SChristian Weisgerber int bit; 104016b4a343SChristian Weisgerber uint8_t data; 104116b4a343SChristian Weisgerber 104216b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 104316b4a343SChristian Weisgerber 104416b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 104516b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 104616b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 104716b4a343SChristian Weisgerber crc <<= 1; 104816b4a343SChristian Weisgerber if (carry) 104916b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 105016b4a343SChristian Weisgerber } 105116b4a343SChristian Weisgerber } 105216b4a343SChristian Weisgerber 105316b4a343SChristian Weisgerber return (crc); 105416b4a343SChristian Weisgerber } 105516b4a343SChristian Weisgerber 1056fb583156SDavid Greenman int 1057995c7fd1SYaroslav Tykhiy ether_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 105830106f6aSPoul-Henning Kamp { 105930106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 106030106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 1061fb583156SDavid Greenman int error = 0; 106230106f6aSPoul-Henning Kamp 106330106f6aSPoul-Henning Kamp switch (command) { 106430106f6aSPoul-Henning Kamp case SIOCSIFADDR: 106530106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 106630106f6aSPoul-Henning Kamp 106730106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 106830106f6aSPoul-Henning Kamp #ifdef INET 106930106f6aSPoul-Henning Kamp case AF_INET: 107030106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1071322dcb8dSMax Khon arp_ifinit(ifp, ifa); 107230106f6aSPoul-Henning Kamp break; 107330106f6aSPoul-Henning Kamp #endif 107430106f6aSPoul-Henning Kamp #ifdef IPX 107530106f6aSPoul-Henning Kamp /* 107630106f6aSPoul-Henning Kamp * XXX - This code is probably wrong 107730106f6aSPoul-Henning Kamp */ 107830106f6aSPoul-Henning Kamp case AF_IPX: 107930106f6aSPoul-Henning Kamp { 1080098a8c3bSMatthew N. Dodd struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 108130106f6aSPoul-Henning Kamp 108230106f6aSPoul-Henning Kamp if (ipx_nullhost(*ina)) 108330106f6aSPoul-Henning Kamp ina->x_host = 108486101139SPoul-Henning Kamp *(union ipx_host *) 10854a0d6638SRuslan Ermilov IF_LLADDR(ifp); 108630106f6aSPoul-Henning Kamp else { 108730106f6aSPoul-Henning Kamp bcopy((caddr_t) ina->x_host.c_host, 10884a0d6638SRuslan Ermilov (caddr_t) IF_LLADDR(ifp), 1089fc74a9f9SBrooks Davis ETHER_ADDR_LEN); 109030106f6aSPoul-Henning Kamp } 109130106f6aSPoul-Henning Kamp 109230106f6aSPoul-Henning Kamp /* 109330106f6aSPoul-Henning Kamp * Set new address 109430106f6aSPoul-Henning Kamp */ 109530106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 109630106f6aSPoul-Henning Kamp break; 109730106f6aSPoul-Henning Kamp } 109830106f6aSPoul-Henning Kamp #endif 109930106f6aSPoul-Henning Kamp default: 110030106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 110130106f6aSPoul-Henning Kamp break; 110230106f6aSPoul-Henning Kamp } 110330106f6aSPoul-Henning Kamp break; 110430106f6aSPoul-Henning Kamp 110530106f6aSPoul-Henning Kamp case SIOCGIFADDR: 110630106f6aSPoul-Henning Kamp { 110730106f6aSPoul-Henning Kamp struct sockaddr *sa; 110830106f6aSPoul-Henning Kamp 110930106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 11104a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 111130106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 111230106f6aSPoul-Henning Kamp } 111330106f6aSPoul-Henning Kamp break; 1114fb583156SDavid Greenman 1115fb583156SDavid Greenman case SIOCSIFMTU: 1116fb583156SDavid Greenman /* 1117fb583156SDavid Greenman * Set the interface MTU. 1118fb583156SDavid Greenman */ 1119fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1120fb583156SDavid Greenman error = EINVAL; 1121fb583156SDavid Greenman } else { 1122fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 112330106f6aSPoul-Henning Kamp } 1124fb583156SDavid Greenman break; 1125c1d93b05SSam Leffler default: 1126c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1127c1d93b05SSam Leffler break; 1128fb583156SDavid Greenman } 1129fb583156SDavid Greenman return (error); 113030106f6aSPoul-Henning Kamp } 11311158dfb7SGarrett Wollman 113237c84183SPoul-Henning Kamp static int 113372fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 113472fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 11351158dfb7SGarrett Wollman { 11361158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1137d7647d96SDag-Erling Smørgrav #ifdef INET 11381158dfb7SGarrett Wollman struct sockaddr_in *sin; 1139d7647d96SDag-Erling Smørgrav #endif 114082cd038dSYoshinobu Inoue #ifdef INET6 114182cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 114282cd038dSYoshinobu Inoue #endif 11431158dfb7SGarrett Wollman u_char *e_addr; 11441158dfb7SGarrett Wollman 11451158dfb7SGarrett Wollman switch(sa->sa_family) { 11461158dfb7SGarrett Wollman case AF_LINK: 11477f33a738SJulian Elischer /* 11487f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 11497f33a738SJulian Elischer */ 11501158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 11511158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1152086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 11531158dfb7SGarrett Wollman return EADDRNOTAVAIL; 11541158dfb7SGarrett Wollman *llsa = 0; 11551158dfb7SGarrett Wollman return 0; 11561158dfb7SGarrett Wollman 11571158dfb7SGarrett Wollman #ifdef INET 11581158dfb7SGarrett Wollman case AF_INET: 11591158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 11601158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 11611158dfb7SGarrett Wollman return EADDRNOTAVAIL; 11621ede983cSDag-Erling Smørgrav sdl = malloc(sizeof *sdl, M_IFMADDR, 116309df718eSRobert Watson M_NOWAIT|M_ZERO); 116409df718eSRobert Watson if (sdl == NULL) 116509df718eSRobert Watson return ENOMEM; 11661158dfb7SGarrett Wollman sdl->sdl_len = sizeof *sdl; 11671158dfb7SGarrett Wollman sdl->sdl_family = AF_LINK; 11681158dfb7SGarrett Wollman sdl->sdl_index = ifp->if_index; 11691158dfb7SGarrett Wollman sdl->sdl_type = IFT_ETHER; 11701158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 11711158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 11721158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 11731158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 11741158dfb7SGarrett Wollman return 0; 11751158dfb7SGarrett Wollman #endif 117682cd038dSYoshinobu Inoue #ifdef INET6 117782cd038dSYoshinobu Inoue case AF_INET6: 117882cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1179595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1180595b8a1cSJun-ichiro itojun Hagino /* 1181595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1182595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1183595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1184595b8a1cSJun-ichiro itojun Hagino */ 1185595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1186595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1187595b8a1cSJun-ichiro itojun Hagino return 0; 1188595b8a1cSJun-ichiro itojun Hagino } 118982cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 119082cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 11911ede983cSDag-Erling Smørgrav sdl = malloc(sizeof *sdl, M_IFMADDR, 119209df718eSRobert Watson M_NOWAIT|M_ZERO); 119309df718eSRobert Watson if (sdl == NULL) 119409df718eSRobert Watson return (ENOMEM); 119582cd038dSYoshinobu Inoue sdl->sdl_len = sizeof *sdl; 119682cd038dSYoshinobu Inoue sdl->sdl_family = AF_LINK; 119782cd038dSYoshinobu Inoue sdl->sdl_index = ifp->if_index; 119882cd038dSYoshinobu Inoue sdl->sdl_type = IFT_ETHER; 119982cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 120082cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 120182cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 120282cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 120382cd038dSYoshinobu Inoue return 0; 120482cd038dSYoshinobu Inoue #endif 12051158dfb7SGarrett Wollman 12061158dfb7SGarrett Wollman default: 12071158dfb7SGarrett Wollman /* 12081158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 12091158dfb7SGarrett Wollman * that counts... 12101158dfb7SGarrett Wollman */ 12111158dfb7SGarrett Wollman return EAFNOSUPPORT; 12121158dfb7SGarrett Wollman } 12131158dfb7SGarrett Wollman } 121440811c14SMatthew N. Dodd 1215fc74a9f9SBrooks Davis static void* 1216fc74a9f9SBrooks Davis ether_alloc(u_char type, struct ifnet *ifp) 1217fc74a9f9SBrooks Davis { 1218fc74a9f9SBrooks Davis struct arpcom *ac; 1219fc74a9f9SBrooks Davis 1220fc74a9f9SBrooks Davis ac = malloc(sizeof(struct arpcom), M_ARPCOM, M_WAITOK | M_ZERO); 1221fc74a9f9SBrooks Davis ac->ac_ifp = ifp; 1222fc74a9f9SBrooks Davis 1223fc74a9f9SBrooks Davis return (ac); 1224fc74a9f9SBrooks Davis } 1225fc74a9f9SBrooks Davis 1226fc74a9f9SBrooks Davis static void 1227fc74a9f9SBrooks Davis ether_free(void *com, u_char type) 1228fc74a9f9SBrooks Davis { 1229fc74a9f9SBrooks Davis 1230fc74a9f9SBrooks Davis free(com, M_ARPCOM); 1231fc74a9f9SBrooks Davis } 1232fc74a9f9SBrooks Davis 1233fc74a9f9SBrooks Davis static int 1234fc74a9f9SBrooks Davis ether_modevent(module_t mod, int type, void *data) 1235fc74a9f9SBrooks Davis { 1236fc74a9f9SBrooks Davis 1237fc74a9f9SBrooks Davis switch (type) { 1238fc74a9f9SBrooks Davis case MOD_LOAD: 1239fc74a9f9SBrooks Davis if_register_com_alloc(IFT_ETHER, ether_alloc, ether_free); 1240fc74a9f9SBrooks Davis break; 1241fc74a9f9SBrooks Davis case MOD_UNLOAD: 1242fc74a9f9SBrooks Davis if_deregister_com_alloc(IFT_ETHER); 1243fc74a9f9SBrooks Davis break; 1244fc74a9f9SBrooks Davis default: 1245fc74a9f9SBrooks Davis return EOPNOTSUPP; 1246fc74a9f9SBrooks Davis } 1247fc74a9f9SBrooks Davis 1248fc74a9f9SBrooks Davis return (0); 1249fc74a9f9SBrooks Davis } 1250fc74a9f9SBrooks Davis 125140811c14SMatthew N. Dodd static moduledata_t ether_mod = { 125240811c14SMatthew N. Dodd "ether", 1253fc74a9f9SBrooks Davis ether_modevent, 125440811c14SMatthew N. Dodd 0 125540811c14SMatthew N. Dodd }; 125640811c14SMatthew N. Dodd 125752f1277eSChristian S.J. Peron void 125852f1277eSChristian S.J. Peron ether_vlan_mtap(struct bpf_if *bp, struct mbuf *m, void *data, u_int dlen) 125952f1277eSChristian S.J. Peron { 126052f1277eSChristian S.J. Peron struct ether_vlan_header vlan; 126152f1277eSChristian S.J. Peron struct mbuf mv, mb; 126252f1277eSChristian S.J. Peron 126352f1277eSChristian S.J. Peron KASSERT((m->m_flags & M_VLANTAG) != 0, 126452f1277eSChristian S.J. Peron ("%s: vlan information not present", __func__)); 126552f1277eSChristian S.J. Peron KASSERT(m->m_len >= sizeof(struct ether_header), 126652f1277eSChristian S.J. Peron ("%s: mbuf not large enough for header", __func__)); 126752f1277eSChristian S.J. Peron bcopy(mtod(m, char *), &vlan, sizeof(struct ether_header)); 126852f1277eSChristian S.J. Peron vlan.evl_proto = vlan.evl_encap_proto; 126952f1277eSChristian S.J. Peron vlan.evl_encap_proto = htons(ETHERTYPE_VLAN); 127052f1277eSChristian S.J. Peron vlan.evl_tag = htons(m->m_pkthdr.ether_vtag); 127152f1277eSChristian S.J. Peron m->m_len -= sizeof(struct ether_header); 127252f1277eSChristian S.J. Peron m->m_data += sizeof(struct ether_header); 127352f1277eSChristian S.J. Peron /* 127452f1277eSChristian S.J. Peron * If a data link has been supplied by the caller, then we will need to 127552f1277eSChristian S.J. Peron * re-create a stack allocated mbuf chain with the following structure: 127652f1277eSChristian S.J. Peron * 127752f1277eSChristian S.J. Peron * (1) mbuf #1 will contain the supplied data link 127852f1277eSChristian S.J. Peron * (2) mbuf #2 will contain the vlan header 127952f1277eSChristian S.J. Peron * (3) mbuf #3 will contain the original mbuf's packet data 128052f1277eSChristian S.J. Peron * 128152f1277eSChristian S.J. Peron * Otherwise, submit the packet and vlan header via bpf_mtap2(). 128252f1277eSChristian S.J. Peron */ 128352f1277eSChristian S.J. Peron if (data != NULL) { 128452f1277eSChristian S.J. Peron mv.m_next = m; 128552f1277eSChristian S.J. Peron mv.m_data = (caddr_t)&vlan; 128652f1277eSChristian S.J. Peron mv.m_len = sizeof(vlan); 128752f1277eSChristian S.J. Peron mb.m_next = &mv; 128852f1277eSChristian S.J. Peron mb.m_data = data; 128952f1277eSChristian S.J. Peron mb.m_len = dlen; 129052f1277eSChristian S.J. Peron bpf_mtap(bp, &mb); 129152f1277eSChristian S.J. Peron } else 129252f1277eSChristian S.J. Peron bpf_mtap2(bp, &vlan, sizeof(vlan), m); 129352f1277eSChristian S.J. Peron m->m_len += sizeof(struct ether_header); 129452f1277eSChristian S.J. Peron m->m_data -= sizeof(struct ether_header); 129552f1277eSChristian S.J. Peron } 129652f1277eSChristian S.J. Peron 129760e87ca8SAndrew Thompson struct mbuf * 1298a0cf8186SAndrew Thompson ether_vlanencap(struct mbuf *m, uint16_t tag) 129960e87ca8SAndrew Thompson { 130060e87ca8SAndrew Thompson struct ether_vlan_header *evl; 130160e87ca8SAndrew Thompson 130260e87ca8SAndrew Thompson M_PREPEND(m, ETHER_VLAN_ENCAP_LEN, M_DONTWAIT); 130360e87ca8SAndrew Thompson if (m == NULL) 130460e87ca8SAndrew Thompson return (NULL); 130560e87ca8SAndrew Thompson /* M_PREPEND takes care of m_len, m_pkthdr.len for us */ 130660e87ca8SAndrew Thompson 130760e87ca8SAndrew Thompson if (m->m_len < sizeof(*evl)) { 130860e87ca8SAndrew Thompson m = m_pullup(m, sizeof(*evl)); 130960e87ca8SAndrew Thompson if (m == NULL) 131060e87ca8SAndrew Thompson return (NULL); 131160e87ca8SAndrew Thompson } 131260e87ca8SAndrew Thompson 131360e87ca8SAndrew Thompson /* 131460e87ca8SAndrew Thompson * Transform the Ethernet header into an Ethernet header 131560e87ca8SAndrew Thompson * with 802.1Q encapsulation. 131660e87ca8SAndrew Thompson */ 131760e87ca8SAndrew Thompson evl = mtod(m, struct ether_vlan_header *); 131860e87ca8SAndrew Thompson bcopy((char *)evl + ETHER_VLAN_ENCAP_LEN, 131960e87ca8SAndrew Thompson (char *)evl, ETHER_HDR_LEN - ETHER_TYPE_LEN); 132060e87ca8SAndrew Thompson evl->evl_encap_proto = htons(ETHERTYPE_VLAN); 132160e87ca8SAndrew Thompson evl->evl_tag = htons(tag); 132260e87ca8SAndrew Thompson return (m); 132360e87ca8SAndrew Thompson } 132460e87ca8SAndrew Thompson 1325fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 132640811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1327