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" 3743b29369SRobert Watson #include "opt_mac.h" 384cf49a43SJulian Elischer #include "opt_netgraph.h" 39a9771948SGleb Smirnoff #include "opt_carp.h" 40430df5f4SEivind Eklund 41df8bae1dSRodney W. Grimes #include <sys/param.h> 42df8bae1dSRodney W. Grimes #include <sys/systm.h> 43df8bae1dSRodney W. Grimes #include <sys/kernel.h> 4443b29369SRobert Watson #include <sys/mac.h> 45df8bae1dSRodney W. Grimes #include <sys/malloc.h> 4641ee9f1cSPoul-Henning Kamp #include <sys/module.h> 47df8bae1dSRodney W. Grimes #include <sys/mbuf.h> 4810b1fde0SMark Murray #include <sys/random.h> 49df8bae1dSRodney W. Grimes #include <sys/socket.h> 5051a53488SBruce Evans #include <sys/sockio.h> 51602d513cSGarrett Wollman #include <sys/sysctl.h> 52df8bae1dSRodney W. Grimes 53df8bae1dSRodney W. Grimes #include <net/if.h> 54d7647d96SDag-Erling Smørgrav #include <net/if_arp.h> 55df8bae1dSRodney W. Grimes #include <net/netisr.h> 56df8bae1dSRodney W. Grimes #include <net/route.h> 57df8bae1dSRodney W. Grimes #include <net/if_llc.h> 58df8bae1dSRodney W. Grimes #include <net/if_dl.h> 59df8bae1dSRodney W. Grimes #include <net/if_types.h> 602e2de7f2SArchie Cobbs #include <net/bpf.h> 61e1e1452dSArchie Cobbs #include <net/ethernet.h> 62fd6238a6SAndrew Thompson #include <net/if_bridgevar.h> 63c1d93b05SSam Leffler #include <net/if_vlan_var.h> 64df8bae1dSRodney W. Grimes 6582cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 66df8bae1dSRodney W. Grimes #include <netinet/in.h> 67df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 68df8bae1dSRodney W. Grimes #include <netinet/if_ether.h> 694b984093SLuigi Rizzo #include <netinet/ip_fw.h> 704b984093SLuigi Rizzo #include <netinet/ip_dummynet.h> 711d5e9e22SEivind Eklund #endif 7282cd038dSYoshinobu Inoue #ifdef INET6 7382cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 7482cd038dSYoshinobu Inoue #endif 75df8bae1dSRodney W. Grimes 76a9771948SGleb Smirnoff #ifdef DEV_CARP 77a9771948SGleb Smirnoff #include <netinet/ip_carp.h> 78a9771948SGleb Smirnoff #endif 79a9771948SGleb Smirnoff 80cc6a66f2SJulian Elischer #ifdef IPX 81cc6a66f2SJulian Elischer #include <netipx/ipx.h> 82cc6a66f2SJulian Elischer #include <netipx/ipx_if.h> 83a1026028SMaxim Sobolev #endif 844f93599fSBoris Popov int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m); 855accfb8cSBoris Popov int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp, 862a7e8eceSBoris Popov struct sockaddr *dst, short *tp, int *hlen); 87cc6a66f2SJulian Elischer 88655929bfSJulian Elischer #ifdef NETATALK 89655929bfSJulian Elischer #include <netatalk/at.h> 90655929bfSJulian Elischer #include <netatalk/at_var.h> 91655929bfSJulian Elischer #include <netatalk/at_extern.h> 92655929bfSJulian Elischer 93655929bfSJulian Elischer #define llc_snap_org_code llc_un.type_snap.org_code 94655929bfSJulian Elischer #define llc_snap_ether_type llc_un.type_snap.ether_type 95655929bfSJulian Elischer 96655929bfSJulian Elischer extern u_char at_org_code[3]; 97655929bfSJulian Elischer extern u_char aarp_org_code[3]; 982cc2df49SGarrett Wollman #endif /* NETATALK */ 992cc2df49SGarrett Wollman 100e1e1452dSArchie Cobbs /* netgraph node hooks for ng_ether(4) */ 101c1d93b05SSam Leffler void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 102c1d93b05SSam Leffler void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 103e1e1452dSArchie Cobbs int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 104e1e1452dSArchie Cobbs void (*ng_ether_attach_p)(struct ifnet *ifp); 105e1e1452dSArchie Cobbs void (*ng_ether_detach_p)(struct ifnet *ifp); 106e1e1452dSArchie Cobbs 107824eb9dcSDavid E. O'Brien void (*vlan_input_p)(struct ifnet *, struct mbuf *); 1089d4fe4b2SBrooks Davis 109fd6238a6SAndrew Thompson /* if_bridge(4) support */ 1108f867517SAndrew Thompson struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *); 1118f867517SAndrew Thompson int (*bridge_output_p)(struct ifnet *, struct mbuf *, 1128f867517SAndrew Thompson struct sockaddr *, struct rtentry *); 113c8b01292SAndrew Thompson void (*bridge_dn_p)(struct mbuf *, struct ifnet *); 1148f867517SAndrew Thompson 115e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 116868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 117868d8b62SMatthew N. Dodd 118929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 119929ddbbbSAlfred Perlstein struct sockaddr *); 120868d8b62SMatthew N. Dodd 121fc74a9f9SBrooks Davis /* XXX: should be in an arp support file, not here */ 122fc74a9f9SBrooks Davis MALLOC_DEFINE(M_ARPCOM, "arpcom", "802.* interface internals"); 123fc74a9f9SBrooks Davis 1244c8e8c05SJulian Elischer #define senderr(e) do { error = (e); goto bad;} while (0) 125df8bae1dSRodney W. Grimes 126d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 1274b984093SLuigi Rizzo int 1284b984093SLuigi Rizzo ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, 129c1d93b05SSam Leffler struct ip_fw **rule, int shared); 1304b984093SLuigi Rizzo static int ether_ipfw; 131d7647d96SDag-Erling Smørgrav #endif 1324b984093SLuigi Rizzo 133df8bae1dSRodney W. Grimes /* 134df8bae1dSRodney W. Grimes * Ethernet output routine. 135df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 136df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 137df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 138df8bae1dSRodney W. Grimes */ 139df8bae1dSRodney W. Grimes int 14072fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 14172fd1b6aSDag-Erling Smørgrav struct sockaddr *dst, struct rtentry *rt0) 142df8bae1dSRodney W. Grimes { 143df8bae1dSRodney W. Grimes short type; 144cd46a114SLuigi Rizzo int error, hdrcmplt = 0; 14564760eb0SWarner Losh u_char esrc[ETHER_ADDR_LEN], edst[ETHER_ADDR_LEN]; 146098a8c3bSMatthew N. Dodd struct ether_header *eh; 147c54c76ccSOleg Bulyzhin int loop_copy = 1; 148d32864c3SRobert Watson int hlen; /* link layer header length */ 149df8bae1dSRodney W. Grimes 15043b29369SRobert Watson #ifdef MAC 15143b29369SRobert Watson error = mac_check_ifnet_transmit(ifp, m); 15243b29369SRobert Watson if (error) 15343b29369SRobert Watson senderr(error); 15443b29369SRobert Watson #endif 15543b29369SRobert Watson 156afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 157afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 15813f4c340SRobert Watson if (!((ifp->if_flags & IFF_UP) && 15913f4c340SRobert Watson (ifp->if_drv_flags & IFF_DRV_RUNNING))) 160df8bae1dSRodney W. Grimes senderr(ENETDOWN); 1617f760c48SMatthew N. Dodd 16284dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 163df8bae1dSRodney W. Grimes switch (dst->sa_family) { 164df8bae1dSRodney W. Grimes #ifdef INET 165df8bae1dSRodney W. Grimes case AF_INET: 166cd46a114SLuigi Rizzo error = arpresolve(ifp, rt0, m, dst, edst); 167cd46a114SLuigi Rizzo if (error) 168cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 16934bed8b0SDavid Greenman type = htons(ETHERTYPE_IP); 170df8bae1dSRodney W. Grimes break; 17143a6c75aSMatthew N. Dodd case AF_ARP: 17243a6c75aSMatthew N. Dodd { 17343a6c75aSMatthew N. Dodd struct arphdr *ah; 17443a6c75aSMatthew N. Dodd ah = mtod(m, struct arphdr *); 17543a6c75aSMatthew N. Dodd ah->ar_hrd = htons(ARPHRD_ETHER); 17643a6c75aSMatthew N. Dodd 177c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 17843a6c75aSMatthew N. Dodd 17943a6c75aSMatthew N. Dodd switch(ntohs(ah->ar_op)) { 18043a6c75aSMatthew N. Dodd case ARPOP_REVREQUEST: 18143a6c75aSMatthew N. Dodd case ARPOP_REVREPLY: 18243a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_REVARP); 18343a6c75aSMatthew N. Dodd break; 18443a6c75aSMatthew N. Dodd case ARPOP_REQUEST: 18543a6c75aSMatthew N. Dodd case ARPOP_REPLY: 18643a6c75aSMatthew N. Dodd default: 18743a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_ARP); 18843a6c75aSMatthew N. Dodd break; 18943a6c75aSMatthew N. Dodd } 19043a6c75aSMatthew N. Dodd 19143a6c75aSMatthew N. Dodd if (m->m_flags & M_BCAST) 19243a6c75aSMatthew N. Dodd bcopy(ifp->if_broadcastaddr, edst, ETHER_ADDR_LEN); 19343a6c75aSMatthew N. Dodd else 19443a6c75aSMatthew N. Dodd bcopy(ar_tha(ah), edst, ETHER_ADDR_LEN); 19543a6c75aSMatthew N. Dodd 19643a6c75aSMatthew N. Dodd } 19743a6c75aSMatthew N. Dodd break; 198df8bae1dSRodney W. Grimes #endif 19982cd038dSYoshinobu Inoue #ifdef INET6 20082cd038dSYoshinobu Inoue case AF_INET6: 201cd46a114SLuigi Rizzo error = nd6_storelladdr(ifp, rt0, m, dst, (u_char *)edst); 202cd46a114SLuigi Rizzo if (error) 203cd46a114SLuigi Rizzo return error; 20482cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 20582cd038dSYoshinobu Inoue break; 20682cd038dSYoshinobu Inoue #endif 207cc6a66f2SJulian Elischer #ifdef IPX 208cc6a66f2SJulian Elischer case AF_IPX: 2094f93599fSBoris Popov if (ef_outputp) { 2102a7e8eceSBoris Popov error = ef_outputp(ifp, &m, dst, &type, &hlen); 2115accfb8cSBoris Popov if (error) 2125accfb8cSBoris Popov goto bad; 2134f93599fSBoris Popov } else 21434bed8b0SDavid Greenman type = htons(ETHERTYPE_IPX); 215cc6a66f2SJulian Elischer bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 216cc6a66f2SJulian Elischer (caddr_t)edst, sizeof (edst)); 217cc6a66f2SJulian Elischer break; 218cc6a66f2SJulian Elischer #endif 219655929bfSJulian Elischer #ifdef NETATALK 220655929bfSJulian Elischer case AF_APPLETALK: 2211d0eab59SJulian Elischer { 222ed7509acSJulian Elischer struct at_ifaddr *aa; 2231d0eab59SJulian Elischer 224cd46a114SLuigi Rizzo if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) 225cd46a114SLuigi Rizzo senderr(EHOSTUNREACH); /* XXX */ 226cd46a114SLuigi Rizzo if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) 2271d0eab59SJulian Elischer return (0); 228655929bfSJulian Elischer /* 229ed7509acSJulian Elischer * In the phase 2 case, need to prepend an mbuf for the llc header. 230655929bfSJulian Elischer */ 231655929bfSJulian Elischer if ( aa->aa_flags & AFA_PHASE2 ) { 232655929bfSJulian Elischer struct llc llc; 233655929bfSJulian Elischer 2347e2041e0SRobert Watson M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); 2352166ffe8SRobert Watson if (m == NULL) 2362166ffe8SRobert Watson senderr(ENOBUFS); 237655929bfSJulian Elischer llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 238655929bfSJulian Elischer llc.llc_control = LLC_UI; 239655929bfSJulian Elischer bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 240655929bfSJulian Elischer llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 241797f247bSMatthew N. Dodd bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 24234bed8b0SDavid Greenman type = htons(m->m_pkthdr.len); 243797f247bSMatthew N. Dodd hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN; 244655929bfSJulian Elischer } else { 24534bed8b0SDavid Greenman type = htons(ETHERTYPE_AT); 246655929bfSJulian Elischer } 247655929bfSJulian Elischer break; 248ed7509acSJulian Elischer } 2498cdfefbdSPeter Wemm #endif /* NETATALK */ 250df8bae1dSRodney W. Grimes 251114ae644SMike Smith case pseudo_AF_HDRCMPLT: 252114ae644SMike Smith hdrcmplt = 1; 253114ae644SMike Smith eh = (struct ether_header *)dst->sa_data; 254114ae644SMike Smith (void)memcpy(esrc, eh->ether_shost, sizeof (esrc)); 255114ae644SMike Smith /* FALLTHROUGH */ 256114ae644SMike Smith 257df8bae1dSRodney W. Grimes case AF_UNSPEC: 258c54c76ccSOleg Bulyzhin loop_copy = 0; /* if this is for us, don't do it */ 259df8bae1dSRodney W. Grimes eh = (struct ether_header *)dst->sa_data; 26094a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 261df8bae1dSRodney W. Grimes type = eh->ether_type; 262df8bae1dSRodney W. Grimes break; 263df8bae1dSRodney W. Grimes 264df8bae1dSRodney W. Grimes default: 26529e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 266df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 267df8bae1dSRodney W. Grimes } 268df8bae1dSRodney W. Grimes 269df8bae1dSRodney W. Grimes /* 270df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 271df8bae1dSRodney W. Grimes * allocate another. 272df8bae1dSRodney W. Grimes */ 273797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 2742166ffe8SRobert Watson if (m == NULL) 275df8bae1dSRodney W. Grimes senderr(ENOBUFS); 276df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 27794a5d9b6SDavid Greenman (void)memcpy(&eh->ether_type, &type, 278df8bae1dSRodney W. Grimes sizeof(eh->ether_type)); 27994a5d9b6SDavid Greenman (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); 280114ae644SMike Smith if (hdrcmplt) 281114ae644SMike Smith (void)memcpy(eh->ether_shost, esrc, 282114ae644SMike Smith sizeof(eh->ether_shost)); 283114ae644SMike Smith else 2844a0d6638SRuslan Ermilov (void)memcpy(eh->ether_shost, IF_LLADDR(ifp), 285df8bae1dSRodney W. Grimes sizeof(eh->ether_shost)); 286ed7509acSJulian Elischer 287ed7509acSJulian Elischer /* 2888f867517SAndrew Thompson * Bridges require special output handling. 2898f867517SAndrew Thompson */ 2908f867517SAndrew Thompson if (ifp->if_bridge) { 291fd6238a6SAndrew Thompson BRIDGE_OUTPUT(ifp, m, error); 292fd6238a6SAndrew Thompson return (error); 2938f867517SAndrew Thompson } 2948f867517SAndrew Thompson 2958f867517SAndrew Thompson /* 296ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 297ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 298ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 299ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 300ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 301ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 302ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 303ed7509acSJulian Elischer */ 304c54c76ccSOleg Bulyzhin if ((ifp->if_flags & IFF_SIMPLEX) && loop_copy && 3050bdf5171SMax Laier m_tag_find(m, PACKET_TAG_PF_ROUTED, NULL) == NULL) { 3063cd67511SJesper Skriver int csum_flags = 0; 3073cd67511SJesper Skriver 3083cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_IP) 3093cd67511SJesper Skriver csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 3103cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 3113cd67511SJesper Skriver csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 31206f684b0SMatthew N. Dodd 313c54c76ccSOleg Bulyzhin if (m->m_flags & M_BCAST) { 31406f684b0SMatthew N. Dodd struct mbuf *n; 315ed7509acSJulian Elischer 31679db6ff3SArchie Cobbs if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 3173cd67511SJesper Skriver n->m_pkthdr.csum_flags |= csum_flags; 3183cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3193cd67511SJesper Skriver n->m_pkthdr.csum_data = 0xffff; 32006a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 321c1404dc0SArchie Cobbs } else 322c1404dc0SArchie Cobbs ifp->if_iqdrops++; 32306f684b0SMatthew N. Dodd } else if (bcmp(eh->ether_dhost, eh->ether_shost, 32406f684b0SMatthew N. Dodd ETHER_ADDR_LEN) == 0) { 3253cd67511SJesper Skriver m->m_pkthdr.csum_flags |= csum_flags; 3263cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3273cd67511SJesper Skriver m->m_pkthdr.csum_data = 0xffff; 32806a429a3SArchie Cobbs (void) if_simloop(ifp, m, dst->sa_family, hlen); 329ed7509acSJulian Elischer return (0); /* XXX */ 330ed7509acSJulian Elischer } 331ed7509acSJulian Elischer } 3322e2de7f2SArchie Cobbs 333a9771948SGleb Smirnoff #ifdef DEV_CARP 334a9771948SGleb Smirnoff if (ifp->if_carp && 335a9771948SGleb Smirnoff (error = carp_output(ifp, m, dst, NULL))) 336a9771948SGleb Smirnoff goto bad; 337a9771948SGleb Smirnoff #endif 338a9771948SGleb Smirnoff 339e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 340eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 341514bcb89SPoul-Henning Kamp KASSERT(ng_ether_output_p != NULL, 342514bcb89SPoul-Henning Kamp ("ng_ether_output_p is NULL")); 343e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 344e1e1452dSArchie Cobbs bad: if (m != NULL) 345e1e1452dSArchie Cobbs m_freem(m); 346e1e1452dSArchie Cobbs return (error); 347e1e1452dSArchie Cobbs } 348e1e1452dSArchie Cobbs if (m == NULL) 349e1e1452dSArchie Cobbs return (0); 350e1e1452dSArchie Cobbs } 351e1e1452dSArchie Cobbs 352e1e1452dSArchie Cobbs /* Continue with link-layer output */ 353e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 354e1e1452dSArchie Cobbs } 355e1e1452dSArchie Cobbs 356e1e1452dSArchie Cobbs /* 357e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 358e1e1452dSArchie Cobbs * 359e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 360e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 361e1e1452dSArchie Cobbs */ 362e1e1452dSArchie Cobbs int 363c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 364e1e1452dSArchie Cobbs { 365d0a2acd4SJulian Elischer int error; 366d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 367ac9d7e26SMax Laier struct ip_fw *rule = ip_dn_claim_rule(m); 3682b25acc1SLuigi Rizzo 3694b984093SLuigi Rizzo if (IPFW_LOADED && ether_ipfw != 0) { 370c1d93b05SSam Leffler if (ether_ipfw_chk(&m, ifp, &rule, 0) == 0) { 3714b984093SLuigi Rizzo if (m) { 3724b984093SLuigi Rizzo m_freem(m); 373e7909401SDavid Malone return EACCES; /* pkt dropped */ 3744b984093SLuigi Rizzo } else 3754b984093SLuigi Rizzo return 0; /* consumed e.g. in a pipe */ 3764b984093SLuigi Rizzo } 3774b984093SLuigi Rizzo } 378d7647d96SDag-Erling Smørgrav #endif 3792b25acc1SLuigi Rizzo 380df8bae1dSRodney W. Grimes /* 381df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 382df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 383df8bae1dSRodney W. Grimes */ 384affc907dSMax Laier IFQ_HANDOFF(ifp, m, error); 385affc907dSMax Laier return (error); 386df8bae1dSRodney W. Grimes } 387df8bae1dSRodney W. Grimes 388d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 389df8bae1dSRodney W. Grimes /* 3904b984093SLuigi Rizzo * ipfw processing for ethernet packets (in and out). 3914b984093SLuigi Rizzo * The second parameter is NULL from ether_demux, and ifp from 392b6de9e91SMax Laier * ether_output_frame. 3934b984093SLuigi Rizzo */ 3944b984093SLuigi Rizzo int 3954b984093SLuigi Rizzo ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, 396c1d93b05SSam Leffler struct ip_fw **rule, int shared) 3974b984093SLuigi Rizzo { 398c1d93b05SSam Leffler struct ether_header *eh; 399c1d93b05SSam Leffler struct ether_header save_eh; 400c1d93b05SSam Leffler struct mbuf *m; 4014b984093SLuigi Rizzo int i; 4022b25acc1SLuigi Rizzo struct ip_fw_args args; 4034b984093SLuigi Rizzo 40497850a5dSLuigi Rizzo if (*rule != NULL && fw_one_pass) 405015d72e0SLuigi Rizzo return 1; /* dummynet packet, already partially processed */ 4062f8ebbf4SLuigi Rizzo 4074b984093SLuigi Rizzo /* 4082f8ebbf4SLuigi Rizzo * I need some amt of data to be contiguous, and in case others need 4094b984093SLuigi Rizzo * the packet (shared==1) also better be in the first mbuf. 4104b984093SLuigi Rizzo */ 411c1d93b05SSam Leffler m = *m0; 412c1d93b05SSam Leffler i = min( m->m_pkthdr.len, max_protohdr); 413c1d93b05SSam Leffler if ( shared || m->m_len < i) { 414c1d93b05SSam Leffler m = m_pullup(m, i); 415c1d93b05SSam Leffler if (m == NULL) { 416c1d93b05SSam Leffler *m0 = m; 4174b984093SLuigi Rizzo return 0; 4184b984093SLuigi Rizzo } 419c1d93b05SSam Leffler } 420c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 421c1d93b05SSam Leffler save_eh = *eh; /* save copy for restore below */ 422c1d93b05SSam Leffler m_adj(m, ETHER_HDR_LEN); /* strip ethernet header */ 4234b984093SLuigi Rizzo 424c1d93b05SSam Leffler args.m = m; /* the packet we are looking at */ 4252b25acc1SLuigi Rizzo args.oif = dst; /* destination, if any */ 4262b25acc1SLuigi Rizzo args.rule = *rule; /* matching rule to restart */ 4272b25acc1SLuigi Rizzo args.next_hop = NULL; /* we do not support forward yet */ 4282b25acc1SLuigi Rizzo args.eh = &save_eh; /* MAC header for bridged/MAC packets */ 4293ecf1851SOleg Bulyzhin args.inp = NULL; /* used by ipfw uid/gid/jail rules */ 4302b25acc1SLuigi Rizzo i = ip_fw_chk_ptr(&args); 431c1d93b05SSam Leffler m = args.m; 432c1d93b05SSam Leffler if (m != NULL) { 433c1d93b05SSam Leffler /* 434c1d93b05SSam Leffler * Restore Ethernet header, as needed, in case the 435c1d93b05SSam Leffler * mbuf chain was replaced by ipfw. 436c1d93b05SSam Leffler */ 437a163d034SWarner Losh M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 438c1d93b05SSam Leffler if (m == NULL) { 439c1d93b05SSam Leffler *m0 = m; 440c1d93b05SSam Leffler return 0; 441c1d93b05SSam Leffler } 442c1d93b05SSam Leffler if (eh != mtod(m, struct ether_header *)) 443c1d93b05SSam Leffler bcopy(&save_eh, mtod(m, struct ether_header *), 444c1d93b05SSam Leffler ETHER_HDR_LEN); 445c1d93b05SSam Leffler } 446c1d93b05SSam Leffler *m0 = m; 4472b25acc1SLuigi Rizzo *rule = args.rule; 4482b25acc1SLuigi Rizzo 4496c69a7c3SGleb Smirnoff if (i == IP_FW_DENY) /* drop */ 4504b984093SLuigi Rizzo return 0; 4514b984093SLuigi Rizzo 4526c69a7c3SGleb Smirnoff KASSERT(m != NULL, ("ether_ipfw_chk: m is NULL")); 4536c69a7c3SGleb Smirnoff 4546c69a7c3SGleb Smirnoff if (i == IP_FW_PASS) /* a PASS rule. */ 4554b984093SLuigi Rizzo return 1; 4564b984093SLuigi Rizzo 4576c69a7c3SGleb Smirnoff if (DUMMYNET_LOADED && (i == IP_FW_DUMMYNET)) { 4584b984093SLuigi Rizzo /* 4594b984093SLuigi Rizzo * Pass the pkt to dummynet, which consumes it. 4604b984093SLuigi Rizzo * If shared, make a copy and keep the original. 4614b984093SLuigi Rizzo */ 4624b984093SLuigi Rizzo if (shared) { 463a163d034SWarner Losh m = m_copypacket(m, M_DONTWAIT); 4642b25acc1SLuigi Rizzo if (m == NULL) 4654b984093SLuigi Rizzo return 0; 4664b984093SLuigi Rizzo } else { 4672b25acc1SLuigi Rizzo /* 468c1d93b05SSam Leffler * Pass the original to dummynet and 469c1d93b05SSam Leffler * nothing back to the caller 4702b25acc1SLuigi Rizzo */ 471c1d93b05SSam Leffler *m0 = NULL ; 4724b984093SLuigi Rizzo } 47328935658SGleb Smirnoff ip_dn_io_ptr(m, dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args); 4744b984093SLuigi Rizzo return 0; 4754b984093SLuigi Rizzo } 4764b984093SLuigi Rizzo /* 4772f8ebbf4SLuigi Rizzo * XXX at some point add support for divert/forward actions. 4782f8ebbf4SLuigi Rizzo * If none of the above matches, we have to drop the pkt. 4794b984093SLuigi Rizzo */ 4804b984093SLuigi Rizzo return 0; 4814b984093SLuigi Rizzo } 482d7647d96SDag-Erling Smørgrav #endif 4834b984093SLuigi Rizzo 4844b984093SLuigi Rizzo /* 485c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 486c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 487df8bae1dSRodney W. Grimes */ 488c1d93b05SSam Leffler static void 489c1d93b05SSam Leffler ether_input(struct ifnet *ifp, struct mbuf *m) 490df8bae1dSRodney W. Grimes { 491c1d93b05SSam Leffler struct ether_header *eh; 492c1d93b05SSam Leffler u_short etype; 493df8bae1dSRodney W. Grimes 494c1d93b05SSam Leffler /* 495c1d93b05SSam Leffler * Do consistency checks to verify assumptions 496c1d93b05SSam Leffler * made by code past this point. 497c1d93b05SSam Leffler */ 498c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 499c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 500c1d93b05SSam Leffler ifp->if_ierrors++; 501c939f1aeSLuigi Rizzo m_freem(m); 502c939f1aeSLuigi Rizzo return; 503c939f1aeSLuigi Rizzo } 504797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 505c1d93b05SSam Leffler /* XXX maybe should pullup? */ 506c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 507c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 508c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 509c1d93b05SSam Leffler ifp->if_ierrors++; 510c1d93b05SSam Leffler m_freem(m); 511c1d93b05SSam Leffler return; 5122e2de7f2SArchie Cobbs } 513c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 514c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 515c1d93b05SSam Leffler if (m->m_pkthdr.len > 516c1d93b05SSam Leffler ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 517c1d93b05SSam Leffler if_printf(ifp, "discard oversize frame " 518c1d93b05SSam Leffler "(ether type %x flags %x len %u > max %lu)\n", 519c1d93b05SSam Leffler etype, m->m_flags, m->m_pkthdr.len, 520c1d93b05SSam Leffler ETHER_MAX_FRAME(ifp, etype, 521c1d93b05SSam Leffler m->m_flags & M_HASFCS)); 522c1d93b05SSam Leffler ifp->if_ierrors++; 523c1d93b05SSam Leffler m_freem(m); 524c1d93b05SSam Leffler return; 525c1d93b05SSam Leffler } 526c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 527c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 528c1d93b05SSam Leffler ifp->if_ierrors++; 529c1d93b05SSam Leffler m_freem(m); 530c1d93b05SSam Leffler return; 531c1d93b05SSam Leffler } 532c1d93b05SSam Leffler #ifdef DIAGNOSTIC 533c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 5349bf40edeSBrooks Davis if_printf(ifp, "Warning, frame marked as received on %s\n", 5359bf40edeSBrooks Davis m->m_pkthdr.rcvif->if_xname); 536c1d93b05SSam Leffler } 537c1d93b05SSam Leffler #endif 538c1d93b05SSam Leffler 539533d8562SRobert Watson #ifdef MAC 540533d8562SRobert Watson /* 541533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 542533d8562SRobert Watson * consumers can get to it. 543533d8562SRobert Watson */ 544533d8562SRobert Watson mac_create_mbuf_from_ifnet(ifp, m); 545533d8562SRobert Watson #endif 546533d8562SRobert Watson 547c1d93b05SSam Leffler /* 548c1d93b05SSam Leffler * Give bpf a chance at the packet. 549c1d93b05SSam Leffler */ 550c1d93b05SSam Leffler BPF_MTAP(ifp, m); 5512e2de7f2SArchie Cobbs 552c1d93b05SSam Leffler /* If the CRC is still on the packet, trim it off. */ 553c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 554c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 555c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 556c1d93b05SSam Leffler } 557c1d93b05SSam Leffler 558c1d93b05SSam Leffler ifp->if_ibytes += m->m_pkthdr.len; 55905463bb5SDavid Greenman 560de572b37SChristian S.J. Peron if (ifp->if_flags & IFF_MONITOR) { 561de572b37SChristian S.J. Peron /* 562de572b37SChristian S.J. Peron * Interface marked for monitoring; discard packet. 563de572b37SChristian S.J. Peron */ 564de572b37SChristian S.J. Peron m_freem(m); 565de572b37SChristian S.J. Peron return; 566de572b37SChristian S.J. Peron } 567de572b37SChristian S.J. Peron 568e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 569eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 570514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_p != NULL, 571514bcb89SPoul-Henning Kamp ("ng_ether_input_p is NULL")); 572c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 573e1e1452dSArchie Cobbs if (m == NULL) 574e1e1452dSArchie Cobbs return; 575e1e1452dSArchie Cobbs } 576e1e1452dSArchie Cobbs 5778f867517SAndrew Thompson /* 5788f867517SAndrew Thompson * Tap the packet off here for a bridge. bridge_input() 5798f867517SAndrew Thompson * will return NULL if it has consumed the packet, otherwise 5808f867517SAndrew Thompson * it gets processed as normal. Note that bridge_input() 5818f867517SAndrew Thompson * will always return the original packet if we need to 5828f867517SAndrew Thompson * process it locally. 5836512768bSGleb Smirnoff * 5846512768bSGleb Smirnoff * XXX: When changing the below block, please also look 5856512768bSGleb Smirnoff * at the src/sys/netgraph/ng_ether.c:ng_ether_rcv_upper() 5868f867517SAndrew Thompson */ 5878f867517SAndrew Thompson if (ifp->if_bridge) { 588fd6238a6SAndrew Thompson BRIDGE_INPUT(ifp, m); 5898f867517SAndrew Thompson if (m == NULL) 5908f867517SAndrew Thompson return; 5918f867517SAndrew Thompson } 5928f867517SAndrew Thompson 593a6ddbff0SPoul-Henning Kamp /* First chunk of an mbuf contains good entropy */ 59410b1fde0SMark Murray if (harvest.ethernet) 59510b1fde0SMark Murray random_harvest(m, 16, 3, 0, RANDOM_NET); 596acf032f5SRobert Watson ether_demux(ifp, m); 597e1e1452dSArchie Cobbs } 598e1e1452dSArchie Cobbs 599e1e1452dSArchie Cobbs /* 600e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 601e1e1452dSArchie Cobbs */ 602e1e1452dSArchie Cobbs void 603c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 604e1e1452dSArchie Cobbs { 605c1d93b05SSam Leffler struct ether_header *eh; 6061cafed39SJonathan Lemon int isr; 607e1e1452dSArchie Cobbs u_short ether_type; 608e1e1452dSArchie Cobbs #if defined(NETATALK) 609098a8c3bSMatthew N. Dodd struct llc *l; 610e1e1452dSArchie Cobbs #endif 611d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 612ac9d7e26SMax Laier struct ip_fw *rule = ip_dn_claim_rule(m); 613d7647d96SDag-Erling Smørgrav #endif 61436e8826fSMax Laier 615c1d93b05SSam Leffler KASSERT(ifp != NULL, ("ether_demux: NULL interface pointer")); 616c1d93b05SSam Leffler 617c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 618cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 619c1d93b05SSam Leffler 620d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 6212b25acc1SLuigi Rizzo if (rule) /* packet was already bridged */ 6222b25acc1SLuigi Rizzo goto post_stats; 623d7647d96SDag-Erling Smørgrav #endif 6244b984093SLuigi Rizzo 625b6de9e91SMax Laier if (!(ifp->if_bridge) && 6266ee20ab5SRuslan Ermilov !((ether_type == ETHERTYPE_VLAN || m->m_flags & M_VLANTAG) && 62775ee267cSGleb Smirnoff ifp->if_vlantrunk != NULL)) { 628a9771948SGleb Smirnoff #ifdef DEV_CARP 629a9771948SGleb Smirnoff /* 63058996b13SGleb Smirnoff * XXX: Okay, we need to call carp_forus() and - if it is for 63158996b13SGleb Smirnoff * us jump over code that does the normal check 6324a0d6638SRuslan Ermilov * "IF_LLADDR(ifp) == ether_dhost". The check sequence is a bit 63358996b13SGleb Smirnoff * different from OpenBSD, so we jump over as few code as 63458996b13SGleb Smirnoff * possible, to catch _all_ sanity checks. This needs 63558996b13SGleb Smirnoff * evaluation, to see if the carp ether_dhost values break any 63658996b13SGleb Smirnoff * of these checks! 637a9771948SGleb Smirnoff */ 638a9771948SGleb Smirnoff if (ifp->if_carp && carp_forus(ifp->if_carp, eh->ether_dhost)) 639a9771948SGleb Smirnoff goto pre_stats; 640a9771948SGleb Smirnoff #endif 641c6943100SPoul-Henning Kamp /* 642c6943100SPoul-Henning Kamp * Discard packet if upper layers shouldn't see it because it 643c6943100SPoul-Henning Kamp * was unicast to a different Ethernet address. If the driver 644c6943100SPoul-Henning Kamp * is working properly, then this situation can only happen 645c6943100SPoul-Henning Kamp * when the interface is in promiscuous mode. 646cd0cd014SJoerg Wunsch * 647cd0cd014SJoerg Wunsch * If VLANs are active, and this packet has a VLAN tag, do 648cd0cd014SJoerg Wunsch * not drop it here but pass it on to the VLAN layer, to 649cd0cd014SJoerg Wunsch * give them a chance to consider it as well (e. g. in case 650cd0cd014SJoerg Wunsch * bridging is only active on a VLAN). They will drop it if 651cd0cd014SJoerg Wunsch * it's undesired. 652c6943100SPoul-Henning Kamp */ 653cb24f323SArchie Cobbs if ((ifp->if_flags & IFF_PROMISC) != 0 6546ee20ab5SRuslan Ermilov && !ETHER_IS_MULTICAST(eh->ether_dhost) 655cb24f323SArchie Cobbs && bcmp(eh->ether_dhost, 6564a0d6638SRuslan Ermilov IF_LLADDR(ifp), ETHER_ADDR_LEN) != 0 65725faf49dSMaxim Sobolev && (ifp->if_flags & IFF_PPROMISC) == 0) { 658cb24f323SArchie Cobbs m_freem(m); 659cb24f323SArchie Cobbs return; 660cb24f323SArchie Cobbs } 661c6943100SPoul-Henning Kamp } 662cb24f323SArchie Cobbs 663a9771948SGleb Smirnoff #ifdef DEV_CARP 664a9771948SGleb Smirnoff pre_stats: 665a9771948SGleb Smirnoff #endif 6662e2de7f2SArchie Cobbs /* Discard packet if interface is not up */ 667df8bae1dSRodney W. Grimes if ((ifp->if_flags & IFF_UP) == 0) { 668df8bae1dSRodney W. Grimes m_freem(m); 669df8bae1dSRodney W. Grimes return; 670df8bae1dSRodney W. Grimes } 671588523faSSam Leffler if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 67264760eb0SWarner Losh if (bcmp(etherbroadcastaddr, eh->ether_dhost, 673df8bae1dSRodney W. Grimes sizeof(etherbroadcastaddr)) == 0) 674df8bae1dSRodney W. Grimes m->m_flags |= M_BCAST; 6752cc2df49SGarrett Wollman else 676df8bae1dSRodney W. Grimes m->m_flags |= M_MCAST; 6772cc2df49SGarrett Wollman } 678df8bae1dSRodney W. Grimes if (m->m_flags & (M_BCAST|M_MCAST)) 679df8bae1dSRodney W. Grimes ifp->if_imcasts++; 680df8bae1dSRodney W. Grimes 681d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 6824b984093SLuigi Rizzo post_stats: 6834b984093SLuigi Rizzo if (IPFW_LOADED && ether_ipfw != 0) { 684c1d93b05SSam Leffler if (ether_ipfw_chk(&m, NULL, &rule, 0) == 0) { 6854b984093SLuigi Rizzo if (m) 6864b984093SLuigi Rizzo m_freem(m); 6874b984093SLuigi Rizzo return; 6884b984093SLuigi Rizzo } 6894b984093SLuigi Rizzo } 690d7647d96SDag-Erling Smørgrav #endif 6914b984093SLuigi Rizzo 692c1d93b05SSam Leffler /* 6936c23e6ccSRuslan Ermilov * Check to see if the device performed the VLAN decapsulation and 694c1d93b05SSam Leffler * provided us with the tag. 695c1d93b05SSam Leffler */ 6966ee20ab5SRuslan Ermilov if (m->m_flags & M_VLANTAG) { 697c1d93b05SSam Leffler /* 6986c23e6ccSRuslan Ermilov * If no VLANs are configured, drop. 6996c23e6ccSRuslan Ermilov */ 70075ee267cSGleb Smirnoff if (ifp->if_vlantrunk == NULL) { 7016c23e6ccSRuslan Ermilov ifp->if_noproto++; 7026c23e6ccSRuslan Ermilov m_freem(m); 7036c23e6ccSRuslan Ermilov return; 7046c23e6ccSRuslan Ermilov } 7056c23e6ccSRuslan Ermilov /* 706c1d93b05SSam Leffler * vlan_input() will either recursively call ether_input() 707c1d93b05SSam Leffler * or drop the packet. 708c1d93b05SSam Leffler */ 709c1d93b05SSam Leffler KASSERT(vlan_input_p != NULL,("ether_input: VLAN not loaded!")); 710c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 711c1d93b05SSam Leffler return; 712c1d93b05SSam Leffler } 713c1d93b05SSam Leffler 714c1d93b05SSam Leffler /* 715c1d93b05SSam Leffler * Handle protocols that expect to have the Ethernet header 716c1d93b05SSam Leffler * (and possibly FCS) intact. 717c1d93b05SSam Leffler */ 718c1d93b05SSam Leffler switch (ether_type) { 719c1d93b05SSam Leffler case ETHERTYPE_VLAN: 72075ee267cSGleb Smirnoff if (ifp->if_vlantrunk != NULL) { 721c1d93b05SSam Leffler KASSERT(vlan_input_p,("ether_input: VLAN not loaded!")); 722c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 723c1d93b05SSam Leffler } else { 724c1d93b05SSam Leffler ifp->if_noproto++; 725c1d93b05SSam Leffler m_freem(m); 726c1d93b05SSam Leffler } 727c1d93b05SSam Leffler return; 728c1d93b05SSam Leffler } 729c1d93b05SSam Leffler 730c1d93b05SSam Leffler /* Strip off Ethernet header. */ 731797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 732c1d93b05SSam Leffler 733c1d93b05SSam Leffler /* If the CRC is still on the packet, trim it off. */ 734c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 735c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 736c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 737c1d93b05SSam Leffler } 738c1d93b05SSam Leffler 739147f74d1SAndre Oppermann /* Reset layer specific mbuf flags to avoid confusing upper layers. */ 740147f74d1SAndre Oppermann m->m_flags &= ~(M_PROTOFLAGS); 741147f74d1SAndre Oppermann 742307d80beSDavid Greenman switch (ether_type) { 743df8bae1dSRodney W. Grimes #ifdef INET 744df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 7455d691e6dSAndre Oppermann if ((m = ip_fastforward(m)) == NULL) 7461f91d8c5SDavid Greenman return; 7471cafed39SJonathan Lemon isr = NETISR_IP; 748df8bae1dSRodney W. Grimes break; 749df8bae1dSRodney W. Grimes 750df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 75108aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 75208aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 75308aadfbbSJonathan Lemon m_freem(m); 75408aadfbbSJonathan Lemon return; 75508aadfbbSJonathan Lemon } 7561cafed39SJonathan Lemon isr = NETISR_ARP; 757df8bae1dSRodney W. Grimes break; 758df8bae1dSRodney W. Grimes #endif 759cc6a66f2SJulian Elischer #ifdef IPX 760cc6a66f2SJulian Elischer case ETHERTYPE_IPX: 7614f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 7624f93599fSBoris Popov return; 7631cafed39SJonathan Lemon isr = NETISR_IPX; 764cc6a66f2SJulian Elischer break; 765cc6a66f2SJulian Elischer #endif 76682cd038dSYoshinobu Inoue #ifdef INET6 76782cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 7681cafed39SJonathan Lemon isr = NETISR_IPV6; 76982cd038dSYoshinobu Inoue break; 77082cd038dSYoshinobu Inoue #endif 771655929bfSJulian Elischer #ifdef NETATALK 772655929bfSJulian Elischer case ETHERTYPE_AT: 7731cafed39SJonathan Lemon isr = NETISR_ATALK1; 774655929bfSJulian Elischer break; 775655929bfSJulian Elischer case ETHERTYPE_AARP: 7761cafed39SJonathan Lemon isr = NETISR_AARP; 7771cafed39SJonathan Lemon break; 7788cdfefbdSPeter Wemm #endif /* NETATALK */ 779df8bae1dSRodney W. Grimes default: 7804f93599fSBoris Popov #ifdef IPX 7814f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 7824f93599fSBoris Popov return; 7834f93599fSBoris Popov #endif /* IPX */ 784242c5536SPeter Wemm #if defined(NETATALK) 785307d80beSDavid Greenman if (ether_type > ETHERMTU) 786c1d93b05SSam Leffler goto discard; 787df8bae1dSRodney W. Grimes l = mtod(m, struct llc *); 7881cafed39SJonathan Lemon if (l->llc_dsap == LLC_SNAP_LSAP && 7891cafed39SJonathan Lemon l->llc_ssap == LLC_SNAP_LSAP && 7901cafed39SJonathan Lemon l->llc_control == LLC_UI) { 7914158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], at_org_code, 792655929bfSJulian Elischer sizeof(at_org_code)) == 0 && 793655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 794797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 7951cafed39SJonathan Lemon isr = NETISR_ATALK2; 796655929bfSJulian Elischer break; 797655929bfSJulian Elischer } 7984158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 799655929bfSJulian Elischer sizeof(aarp_org_code)) == 0 && 800655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 801797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 8021cafed39SJonathan Lemon isr = NETISR_AARP; 803655929bfSJulian Elischer break; 804df8bae1dSRodney W. Grimes } 8051cafed39SJonathan Lemon } 806242c5536SPeter Wemm #endif /* NETATALK */ 8071cafed39SJonathan Lemon goto discard; 808df8bae1dSRodney W. Grimes } 8091cafed39SJonathan Lemon netisr_dispatch(isr, m); 810c1d93b05SSam Leffler return; 8111cafed39SJonathan Lemon 812c1d93b05SSam Leffler discard: 813c1d93b05SSam Leffler /* 814c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 815c1d93b05SSam Leffler * hand the packet to it for last chance processing; 816c1d93b05SSam Leffler * otherwise dispose of it. 817c1d93b05SSam Leffler */ 818eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 819514bcb89SPoul-Henning Kamp KASSERT(ng_ether_input_orphan_p != NULL, 820514bcb89SPoul-Henning Kamp ("ng_ether_input_orphan_p is NULL")); 821c1d93b05SSam Leffler /* 822c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 823c1d93b05SSam Leffler * consistent view of inbound packets. 824c1d93b05SSam Leffler */ 825797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 826c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 827c1d93b05SSam Leffler return; 828c1d93b05SSam Leffler } 829c1d93b05SSam Leffler m_freem(m); 830c1d93b05SSam Leffler } 831c1d93b05SSam Leffler 832c1d93b05SSam Leffler /* 833c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 834c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 835c1d93b05SSam Leffler * 836c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 837c1d93b05SSam Leffler * 838c1d93b05SSam Leffler * since there's no static buffer involved. 839c1d93b05SSam Leffler */ 840c1d93b05SSam Leffler char * 841c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 842c1d93b05SSam Leffler { 843c1d93b05SSam Leffler static char etherbuf[18]; 844c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 845c1d93b05SSam Leffler return (etherbuf); 846df8bae1dSRodney W. Grimes } 847df8bae1dSRodney W. Grimes 848df8bae1dSRodney W. Grimes /* 849df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 850df8bae1dSRodney W. Grimes */ 851df8bae1dSRodney W. Grimes void 852d09ed26fSRuslan Ermilov ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 853df8bae1dSRodney W. Grimes { 854f93dfa28SBrooks Davis int i; 855098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 856098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 857df8bae1dSRodney W. Grimes 858c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 859c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 860cfeff1b6SJonathan Lemon if_attach(ifp); 861df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 862c1d93b05SSam Leffler ifp->if_output = ether_output; 863c1d93b05SSam Leffler ifp->if_input = ether_input; 8641158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 865a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 866c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 867322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 868c1d93b05SSam Leffler 8694a0d6638SRuslan Ermilov ifa = ifp->if_addr; 8706e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 87159562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 872df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 873df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 874d09ed26fSRuslan Ermilov bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 875c1d93b05SSam Leffler 876797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 877e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 878e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 879e3bbbec2SMatthew N. Dodd 880f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 881f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 882d09ed26fSRuslan Ermilov if (lla[i] != 0) 883f93dfa28SBrooks Davis break; 884f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 885d09ed26fSRuslan Ermilov if_printf(ifp, "Ethernet address: %6D\n", lla, ":"); 886af5e59bfSRobert Watson if (debug_mpsafenet && (ifp->if_flags & IFF_NEEDSGIANT) != 0) 887af5e59bfSRobert Watson if_printf(ifp, "if_start running deferred for Giant\n"); 888e1e1452dSArchie Cobbs } 889e1e1452dSArchie Cobbs 89021b8ebd9SArchie Cobbs /* 89121b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 89221b8ebd9SArchie Cobbs */ 89321b8ebd9SArchie Cobbs void 894c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 89521b8ebd9SArchie Cobbs { 896514bcb89SPoul-Henning Kamp if (IFP2AC(ifp)->ac_netgraph != NULL) { 897514bcb89SPoul-Henning Kamp KASSERT(ng_ether_detach_p != NULL, 898514bcb89SPoul-Henning Kamp ("ng_ether_detach_p is NULL")); 89921b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 900514bcb89SPoul-Henning Kamp } 90120a65f37SAndrew Thompson 90221b8ebd9SArchie Cobbs bpfdetach(ifp); 90321b8ebd9SArchie Cobbs if_detach(ifp); 90421b8ebd9SArchie Cobbs } 90521b8ebd9SArchie Cobbs 906ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 907602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 908d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 9094b984093SLuigi Rizzo SYSCTL_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW, 9104b984093SLuigi Rizzo ðer_ipfw,0,"Pass ether pkts through firewall"); 911d7647d96SDag-Erling Smørgrav #endif 91230106f6aSPoul-Henning Kamp 91316b4a343SChristian Weisgerber #if 0 91416b4a343SChristian Weisgerber /* 91516b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 91616b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 91716b4a343SChristian Weisgerber * than the double-loop. 91816b4a343SChristian Weisgerber */ 91916b4a343SChristian Weisgerber uint32_t 92016b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 92116b4a343SChristian Weisgerber { 92216b4a343SChristian Weisgerber size_t i; 92316b4a343SChristian Weisgerber uint32_t crc; 92416b4a343SChristian Weisgerber int bit; 92516b4a343SChristian Weisgerber uint8_t data; 92616b4a343SChristian Weisgerber 92716b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 92816b4a343SChristian Weisgerber 92916b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 93016b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) 93116b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 93216b4a343SChristian Weisgerber crc >>= 1; 93316b4a343SChristian Weisgerber if (carry) 93416b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 93516b4a343SChristian Weisgerber } 93616b4a343SChristian Weisgerber 93716b4a343SChristian Weisgerber return (crc); 93816b4a343SChristian Weisgerber } 93916b4a343SChristian Weisgerber #else 94016b4a343SChristian Weisgerber uint32_t 94116b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 94216b4a343SChristian Weisgerber { 94316b4a343SChristian Weisgerber static const uint32_t crctab[] = { 94416b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 94516b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 94616b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 94716b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 94816b4a343SChristian Weisgerber }; 94916b4a343SChristian Weisgerber size_t i; 95016b4a343SChristian Weisgerber uint32_t crc; 95116b4a343SChristian Weisgerber 95216b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 95316b4a343SChristian Weisgerber 95416b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 95516b4a343SChristian Weisgerber crc ^= buf[i]; 95616b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 95716b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 95816b4a343SChristian Weisgerber } 95916b4a343SChristian Weisgerber 96016b4a343SChristian Weisgerber return (crc); 96116b4a343SChristian Weisgerber } 96216b4a343SChristian Weisgerber #endif 96316b4a343SChristian Weisgerber 96416b4a343SChristian Weisgerber uint32_t 96516b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 96616b4a343SChristian Weisgerber { 96716b4a343SChristian Weisgerber size_t i; 96816b4a343SChristian Weisgerber uint32_t crc, carry; 96916b4a343SChristian Weisgerber int bit; 97016b4a343SChristian Weisgerber uint8_t data; 97116b4a343SChristian Weisgerber 97216b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 97316b4a343SChristian Weisgerber 97416b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 97516b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 97616b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 97716b4a343SChristian Weisgerber crc <<= 1; 97816b4a343SChristian Weisgerber if (carry) 97916b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 98016b4a343SChristian Weisgerber } 98116b4a343SChristian Weisgerber } 98216b4a343SChristian Weisgerber 98316b4a343SChristian Weisgerber return (crc); 98416b4a343SChristian Weisgerber } 98516b4a343SChristian Weisgerber 986fb583156SDavid Greenman int 98772fd1b6aSDag-Erling Smørgrav ether_ioctl(struct ifnet *ifp, int command, caddr_t data) 98830106f6aSPoul-Henning Kamp { 98930106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 99030106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 991fb583156SDavid Greenman int error = 0; 99230106f6aSPoul-Henning Kamp 99330106f6aSPoul-Henning Kamp switch (command) { 99430106f6aSPoul-Henning Kamp case SIOCSIFADDR: 99530106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 99630106f6aSPoul-Henning Kamp 99730106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 99830106f6aSPoul-Henning Kamp #ifdef INET 99930106f6aSPoul-Henning Kamp case AF_INET: 100030106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 1001322dcb8dSMax Khon arp_ifinit(ifp, ifa); 100230106f6aSPoul-Henning Kamp break; 100330106f6aSPoul-Henning Kamp #endif 100430106f6aSPoul-Henning Kamp #ifdef IPX 100530106f6aSPoul-Henning Kamp /* 100630106f6aSPoul-Henning Kamp * XXX - This code is probably wrong 100730106f6aSPoul-Henning Kamp */ 100830106f6aSPoul-Henning Kamp case AF_IPX: 100930106f6aSPoul-Henning Kamp { 1010098a8c3bSMatthew N. Dodd struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 101130106f6aSPoul-Henning Kamp 101230106f6aSPoul-Henning Kamp if (ipx_nullhost(*ina)) 101330106f6aSPoul-Henning Kamp ina->x_host = 101486101139SPoul-Henning Kamp *(union ipx_host *) 10154a0d6638SRuslan Ermilov IF_LLADDR(ifp); 101630106f6aSPoul-Henning Kamp else { 101730106f6aSPoul-Henning Kamp bcopy((caddr_t) ina->x_host.c_host, 10184a0d6638SRuslan Ermilov (caddr_t) IF_LLADDR(ifp), 1019fc74a9f9SBrooks Davis ETHER_ADDR_LEN); 102030106f6aSPoul-Henning Kamp } 102130106f6aSPoul-Henning Kamp 102230106f6aSPoul-Henning Kamp /* 102330106f6aSPoul-Henning Kamp * Set new address 102430106f6aSPoul-Henning Kamp */ 102530106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 102630106f6aSPoul-Henning Kamp break; 102730106f6aSPoul-Henning Kamp } 102830106f6aSPoul-Henning Kamp #endif 102930106f6aSPoul-Henning Kamp default: 103030106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 103130106f6aSPoul-Henning Kamp break; 103230106f6aSPoul-Henning Kamp } 103330106f6aSPoul-Henning Kamp break; 103430106f6aSPoul-Henning Kamp 103530106f6aSPoul-Henning Kamp case SIOCGIFADDR: 103630106f6aSPoul-Henning Kamp { 103730106f6aSPoul-Henning Kamp struct sockaddr *sa; 103830106f6aSPoul-Henning Kamp 103930106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 10404a0d6638SRuslan Ermilov bcopy(IF_LLADDR(ifp), 104130106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 104230106f6aSPoul-Henning Kamp } 104330106f6aSPoul-Henning Kamp break; 1044fb583156SDavid Greenman 1045fb583156SDavid Greenman case SIOCSIFMTU: 1046fb583156SDavid Greenman /* 1047fb583156SDavid Greenman * Set the interface MTU. 1048fb583156SDavid Greenman */ 1049fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1050fb583156SDavid Greenman error = EINVAL; 1051fb583156SDavid Greenman } else { 1052fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 105330106f6aSPoul-Henning Kamp } 1054fb583156SDavid Greenman break; 1055c1d93b05SSam Leffler default: 1056c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1057c1d93b05SSam Leffler break; 1058fb583156SDavid Greenman } 1059fb583156SDavid Greenman return (error); 106030106f6aSPoul-Henning Kamp } 10611158dfb7SGarrett Wollman 106237c84183SPoul-Henning Kamp static int 106372fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 106472fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 10651158dfb7SGarrett Wollman { 10661158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1067d7647d96SDag-Erling Smørgrav #ifdef INET 10681158dfb7SGarrett Wollman struct sockaddr_in *sin; 1069d7647d96SDag-Erling Smørgrav #endif 107082cd038dSYoshinobu Inoue #ifdef INET6 107182cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 107282cd038dSYoshinobu Inoue #endif 10731158dfb7SGarrett Wollman u_char *e_addr; 10741158dfb7SGarrett Wollman 10751158dfb7SGarrett Wollman switch(sa->sa_family) { 10761158dfb7SGarrett Wollman case AF_LINK: 10777f33a738SJulian Elischer /* 10787f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 10797f33a738SJulian Elischer */ 10801158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 10811158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1082086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 10831158dfb7SGarrett Wollman return EADDRNOTAVAIL; 10841158dfb7SGarrett Wollman *llsa = 0; 10851158dfb7SGarrett Wollman return 0; 10861158dfb7SGarrett Wollman 10871158dfb7SGarrett Wollman #ifdef INET 10881158dfb7SGarrett Wollman case AF_INET: 10891158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 10901158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 10911158dfb7SGarrett Wollman return EADDRNOTAVAIL; 10921158dfb7SGarrett Wollman MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 109309df718eSRobert Watson M_NOWAIT|M_ZERO); 109409df718eSRobert Watson if (sdl == NULL) 109509df718eSRobert Watson return ENOMEM; 10961158dfb7SGarrett Wollman sdl->sdl_len = sizeof *sdl; 10971158dfb7SGarrett Wollman sdl->sdl_family = AF_LINK; 10981158dfb7SGarrett Wollman sdl->sdl_index = ifp->if_index; 10991158dfb7SGarrett Wollman sdl->sdl_type = IFT_ETHER; 11001158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 11011158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 11021158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 11031158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 11041158dfb7SGarrett Wollman return 0; 11051158dfb7SGarrett Wollman #endif 110682cd038dSYoshinobu Inoue #ifdef INET6 110782cd038dSYoshinobu Inoue case AF_INET6: 110882cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1109595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1110595b8a1cSJun-ichiro itojun Hagino /* 1111595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1112595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1113595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1114595b8a1cSJun-ichiro itojun Hagino */ 1115595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1116595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1117595b8a1cSJun-ichiro itojun Hagino return 0; 1118595b8a1cSJun-ichiro itojun Hagino } 111982cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 112082cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 112182cd038dSYoshinobu Inoue MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 112209df718eSRobert Watson M_NOWAIT|M_ZERO); 112309df718eSRobert Watson if (sdl == NULL) 112409df718eSRobert Watson return (ENOMEM); 112582cd038dSYoshinobu Inoue sdl->sdl_len = sizeof *sdl; 112682cd038dSYoshinobu Inoue sdl->sdl_family = AF_LINK; 112782cd038dSYoshinobu Inoue sdl->sdl_index = ifp->if_index; 112882cd038dSYoshinobu Inoue sdl->sdl_type = IFT_ETHER; 112982cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 113082cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 113182cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 113282cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 113382cd038dSYoshinobu Inoue return 0; 113482cd038dSYoshinobu Inoue #endif 11351158dfb7SGarrett Wollman 11361158dfb7SGarrett Wollman default: 11371158dfb7SGarrett Wollman /* 11381158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 11391158dfb7SGarrett Wollman * that counts... 11401158dfb7SGarrett Wollman */ 11411158dfb7SGarrett Wollman return EAFNOSUPPORT; 11421158dfb7SGarrett Wollman } 11431158dfb7SGarrett Wollman } 114440811c14SMatthew N. Dodd 1145fc74a9f9SBrooks Davis static void* 1146fc74a9f9SBrooks Davis ether_alloc(u_char type, struct ifnet *ifp) 1147fc74a9f9SBrooks Davis { 1148fc74a9f9SBrooks Davis struct arpcom *ac; 1149fc74a9f9SBrooks Davis 1150fc74a9f9SBrooks Davis ac = malloc(sizeof(struct arpcom), M_ARPCOM, M_WAITOK | M_ZERO); 1151fc74a9f9SBrooks Davis ac->ac_ifp = ifp; 1152fc74a9f9SBrooks Davis 1153fc74a9f9SBrooks Davis return (ac); 1154fc74a9f9SBrooks Davis } 1155fc74a9f9SBrooks Davis 1156fc74a9f9SBrooks Davis static void 1157fc74a9f9SBrooks Davis ether_free(void *com, u_char type) 1158fc74a9f9SBrooks Davis { 1159fc74a9f9SBrooks Davis 1160fc74a9f9SBrooks Davis free(com, M_ARPCOM); 1161fc74a9f9SBrooks Davis } 1162fc74a9f9SBrooks Davis 1163fc74a9f9SBrooks Davis static int 1164fc74a9f9SBrooks Davis ether_modevent(module_t mod, int type, void *data) 1165fc74a9f9SBrooks Davis { 1166fc74a9f9SBrooks Davis 1167fc74a9f9SBrooks Davis switch (type) { 1168fc74a9f9SBrooks Davis case MOD_LOAD: 1169fc74a9f9SBrooks Davis if_register_com_alloc(IFT_ETHER, ether_alloc, ether_free); 1170fc74a9f9SBrooks Davis break; 1171fc74a9f9SBrooks Davis case MOD_UNLOAD: 1172fc74a9f9SBrooks Davis if_deregister_com_alloc(IFT_ETHER); 1173fc74a9f9SBrooks Davis break; 1174fc74a9f9SBrooks Davis default: 1175fc74a9f9SBrooks Davis return EOPNOTSUPP; 1176fc74a9f9SBrooks Davis } 1177fc74a9f9SBrooks Davis 1178fc74a9f9SBrooks Davis return (0); 1179fc74a9f9SBrooks Davis } 1180fc74a9f9SBrooks Davis 118140811c14SMatthew N. Dodd static moduledata_t ether_mod = { 118240811c14SMatthew N. Dodd "ether", 1183fc74a9f9SBrooks Davis ether_modevent, 118440811c14SMatthew N. Dodd 0 118540811c14SMatthew N. Dodd }; 118640811c14SMatthew N. Dodd 1187fc74a9f9SBrooks Davis DECLARE_MODULE(ether, ether_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 118840811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1189