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" 37fb5fbe46SLuigi Rizzo #include "opt_bdg.h" 3843b29369SRobert Watson #include "opt_mac.h" 394cf49a43SJulian Elischer #include "opt_netgraph.h" 40a9771948SGleb Smirnoff #include "opt_carp.h" 41430df5f4SEivind Eklund 42df8bae1dSRodney W. Grimes #include <sys/param.h> 43df8bae1dSRodney W. Grimes #include <sys/systm.h> 44df8bae1dSRodney W. Grimes #include <sys/kernel.h> 4543b29369SRobert Watson #include <sys/mac.h> 46df8bae1dSRodney W. Grimes #include <sys/malloc.h> 4741ee9f1cSPoul-Henning Kamp #include <sys/module.h> 48df8bae1dSRodney W. Grimes #include <sys/mbuf.h> 4910b1fde0SMark Murray #include <sys/random.h> 50df8bae1dSRodney W. Grimes #include <sys/socket.h> 5151a53488SBruce Evans #include <sys/sockio.h> 52602d513cSGarrett Wollman #include <sys/sysctl.h> 53df8bae1dSRodney W. Grimes 54df8bae1dSRodney W. Grimes #include <net/if.h> 55d7647d96SDag-Erling Smørgrav #include <net/if_arp.h> 56df8bae1dSRodney W. Grimes #include <net/netisr.h> 57df8bae1dSRodney W. Grimes #include <net/route.h> 58df8bae1dSRodney W. Grimes #include <net/if_llc.h> 59df8bae1dSRodney W. Grimes #include <net/if_dl.h> 60df8bae1dSRodney W. Grimes #include <net/if_types.h> 612e2de7f2SArchie Cobbs #include <net/bpf.h> 62e1e1452dSArchie Cobbs #include <net/ethernet.h> 63db69a05dSPaul Saab #include <net/bridge.h> 64c1d93b05SSam Leffler #include <net/if_vlan_var.h> 65df8bae1dSRodney W. Grimes 6682cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 67df8bae1dSRodney W. Grimes #include <netinet/in.h> 68df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 69df8bae1dSRodney W. Grimes #include <netinet/if_ether.h> 704b984093SLuigi Rizzo #include <netinet/ip_fw.h> 714b984093SLuigi Rizzo #include <netinet/ip_dummynet.h> 721d5e9e22SEivind Eklund #endif 7382cd038dSYoshinobu Inoue #ifdef INET6 7482cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 7582cd038dSYoshinobu Inoue #endif 76df8bae1dSRodney W. Grimes 77a9771948SGleb Smirnoff #ifdef DEV_CARP 78a9771948SGleb Smirnoff #include <netinet/ip_carp.h> 79a9771948SGleb Smirnoff #endif 80a9771948SGleb Smirnoff 81cc6a66f2SJulian Elischer #ifdef IPX 82cc6a66f2SJulian Elischer #include <netipx/ipx.h> 83cc6a66f2SJulian Elischer #include <netipx/ipx_if.h> 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 #endif 88cc6a66f2SJulian Elischer 89655929bfSJulian Elischer #ifdef NETATALK 90655929bfSJulian Elischer #include <netatalk/at.h> 91655929bfSJulian Elischer #include <netatalk/at_var.h> 92655929bfSJulian Elischer #include <netatalk/at_extern.h> 93655929bfSJulian Elischer 94655929bfSJulian Elischer #define llc_snap_org_code llc_un.type_snap.org_code 95655929bfSJulian Elischer #define llc_snap_ether_type llc_un.type_snap.ether_type 96655929bfSJulian Elischer 97655929bfSJulian Elischer extern u_char at_org_code[3]; 98655929bfSJulian Elischer extern u_char aarp_org_code[3]; 992cc2df49SGarrett Wollman #endif /* NETATALK */ 1002cc2df49SGarrett Wollman 101e1e1452dSArchie Cobbs /* netgraph node hooks for ng_ether(4) */ 102c1d93b05SSam Leffler void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 103c1d93b05SSam Leffler void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 104e1e1452dSArchie Cobbs int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 105e1e1452dSArchie Cobbs void (*ng_ether_attach_p)(struct ifnet *ifp); 106e1e1452dSArchie Cobbs void (*ng_ether_detach_p)(struct ifnet *ifp); 107e1e1452dSArchie Cobbs 108824eb9dcSDavid E. O'Brien void (*vlan_input_p)(struct ifnet *, struct mbuf *); 1099d4fe4b2SBrooks Davis 110db69a05dSPaul Saab /* bridge support */ 111cad15830SLuigi Rizzo int do_bridge; 112db69a05dSPaul Saab bridge_in_t *bridge_in_ptr; 113db69a05dSPaul Saab bdg_forward_t *bdg_forward_ptr; 114db69a05dSPaul Saab bdgtakeifaces_t *bdgtakeifaces_ptr; 115cad15830SLuigi Rizzo struct bdg_softc *ifp2sc; 116db69a05dSPaul Saab 117e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 118868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 119868d8b62SMatthew N. Dodd 120929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 121929ddbbbSAlfred Perlstein struct sockaddr *); 122868d8b62SMatthew N. Dodd 1234c8e8c05SJulian Elischer #define senderr(e) do { error = (e); goto bad;} while (0) 124df8bae1dSRodney W. Grimes 125d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 1264b984093SLuigi Rizzo int 1274b984093SLuigi Rizzo ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, 128c1d93b05SSam Leffler struct ip_fw **rule, int shared); 1294b984093SLuigi Rizzo static int ether_ipfw; 130d7647d96SDag-Erling Smørgrav #endif 1314b984093SLuigi Rizzo 132df8bae1dSRodney W. Grimes /* 133df8bae1dSRodney W. Grimes * Ethernet output routine. 134df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 135df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 136df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 137df8bae1dSRodney W. Grimes * Assumes that ifp is actually pointer to arpcom structure. 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; 1479961e27dSLuigi Rizzo int loop_copy = 0; 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); 158df8bae1dSRodney W. Grimes if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 159df8bae1dSRodney W. Grimes senderr(ENETDOWN); 1607f760c48SMatthew N. Dodd 16184dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 162df8bae1dSRodney W. Grimes switch (dst->sa_family) { 163df8bae1dSRodney W. Grimes #ifdef INET 164df8bae1dSRodney W. Grimes case AF_INET: 165cd46a114SLuigi Rizzo error = arpresolve(ifp, rt0, m, dst, edst); 166cd46a114SLuigi Rizzo if (error) 167cd46a114SLuigi Rizzo return (error == EWOULDBLOCK ? 0 : error); 16834bed8b0SDavid Greenman type = htons(ETHERTYPE_IP); 169df8bae1dSRodney W. Grimes break; 17043a6c75aSMatthew N. Dodd case AF_ARP: 17143a6c75aSMatthew N. Dodd { 17243a6c75aSMatthew N. Dodd struct arphdr *ah; 17343a6c75aSMatthew N. Dodd ah = mtod(m, struct arphdr *); 17443a6c75aSMatthew N. Dodd ah->ar_hrd = htons(ARPHRD_ETHER); 17543a6c75aSMatthew N. Dodd 17643a6c75aSMatthew N. Dodd loop_copy = -1; /* if this is for us, don't do it */ 17743a6c75aSMatthew N. Dodd 17843a6c75aSMatthew N. Dodd switch(ntohs(ah->ar_op)) { 17943a6c75aSMatthew N. Dodd case ARPOP_REVREQUEST: 18043a6c75aSMatthew N. Dodd case ARPOP_REVREPLY: 18143a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_REVARP); 18243a6c75aSMatthew N. Dodd break; 18343a6c75aSMatthew N. Dodd case ARPOP_REQUEST: 18443a6c75aSMatthew N. Dodd case ARPOP_REPLY: 18543a6c75aSMatthew N. Dodd default: 18643a6c75aSMatthew N. Dodd type = htons(ETHERTYPE_ARP); 18743a6c75aSMatthew N. Dodd break; 18843a6c75aSMatthew N. Dodd } 18943a6c75aSMatthew N. Dodd 19043a6c75aSMatthew N. Dodd if (m->m_flags & M_BCAST) 19143a6c75aSMatthew N. Dodd bcopy(ifp->if_broadcastaddr, edst, ETHER_ADDR_LEN); 19243a6c75aSMatthew N. Dodd else 19343a6c75aSMatthew N. Dodd bcopy(ar_tha(ah), edst, ETHER_ADDR_LEN); 19443a6c75aSMatthew N. Dodd 19543a6c75aSMatthew N. Dodd } 19643a6c75aSMatthew N. Dodd break; 197df8bae1dSRodney W. Grimes #endif 19882cd038dSYoshinobu Inoue #ifdef INET6 19982cd038dSYoshinobu Inoue case AF_INET6: 200cd46a114SLuigi Rizzo error = nd6_storelladdr(ifp, rt0, m, dst, (u_char *)edst); 201cd46a114SLuigi Rizzo if (error) 202cd46a114SLuigi Rizzo return error; 20382cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 20482cd038dSYoshinobu Inoue break; 20582cd038dSYoshinobu Inoue #endif 206cc6a66f2SJulian Elischer #ifdef IPX 207cc6a66f2SJulian Elischer case AF_IPX: 2084f93599fSBoris Popov if (ef_outputp) { 2092a7e8eceSBoris Popov error = ef_outputp(ifp, &m, dst, &type, &hlen); 2105accfb8cSBoris Popov if (error) 2115accfb8cSBoris Popov goto bad; 2124f93599fSBoris Popov } else 21334bed8b0SDavid Greenman type = htons(ETHERTYPE_IPX); 214cc6a66f2SJulian Elischer bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 215cc6a66f2SJulian Elischer (caddr_t)edst, sizeof (edst)); 216cc6a66f2SJulian Elischer break; 217cc6a66f2SJulian Elischer #endif 218655929bfSJulian Elischer #ifdef NETATALK 219655929bfSJulian Elischer case AF_APPLETALK: 2201d0eab59SJulian Elischer { 221ed7509acSJulian Elischer struct at_ifaddr *aa; 2221d0eab59SJulian Elischer 223cd46a114SLuigi Rizzo if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) 224cd46a114SLuigi Rizzo senderr(EHOSTUNREACH); /* XXX */ 225cd46a114SLuigi Rizzo if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) 2261d0eab59SJulian Elischer return (0); 227655929bfSJulian Elischer /* 228ed7509acSJulian Elischer * In the phase 2 case, need to prepend an mbuf for the llc header. 229655929bfSJulian Elischer */ 230655929bfSJulian Elischer if ( aa->aa_flags & AFA_PHASE2 ) { 231655929bfSJulian Elischer struct llc llc; 232655929bfSJulian Elischer 233797f247bSMatthew N. Dodd M_PREPEND(m, LLC_SNAPFRAMELEN, M_TRYWAIT); 2342166ffe8SRobert Watson if (m == NULL) 2352166ffe8SRobert Watson senderr(ENOBUFS); 236655929bfSJulian Elischer llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 237655929bfSJulian Elischer llc.llc_control = LLC_UI; 238655929bfSJulian Elischer bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 239655929bfSJulian Elischer llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 240797f247bSMatthew N. Dodd bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 24134bed8b0SDavid Greenman type = htons(m->m_pkthdr.len); 242797f247bSMatthew N. Dodd hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN; 243655929bfSJulian Elischer } else { 24434bed8b0SDavid Greenman type = htons(ETHERTYPE_AT); 245655929bfSJulian Elischer } 246655929bfSJulian Elischer break; 247ed7509acSJulian Elischer } 2488cdfefbdSPeter Wemm #endif /* NETATALK */ 249df8bae1dSRodney W. Grimes 250114ae644SMike Smith case pseudo_AF_HDRCMPLT: 251114ae644SMike Smith hdrcmplt = 1; 252114ae644SMike Smith eh = (struct ether_header *)dst->sa_data; 253114ae644SMike Smith (void)memcpy(esrc, eh->ether_shost, sizeof (esrc)); 254114ae644SMike Smith /* FALLTHROUGH */ 255114ae644SMike Smith 256df8bae1dSRodney W. Grimes case AF_UNSPEC: 2579d3f194dSJulian Elischer loop_copy = -1; /* if this is for us, don't do it */ 258df8bae1dSRodney W. Grimes eh = (struct ether_header *)dst->sa_data; 25994a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 260df8bae1dSRodney W. Grimes type = eh->ether_type; 261df8bae1dSRodney W. Grimes break; 262df8bae1dSRodney W. Grimes 263df8bae1dSRodney W. Grimes default: 26429e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 265df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 266df8bae1dSRodney W. Grimes } 267df8bae1dSRodney W. Grimes 268df8bae1dSRodney W. Grimes /* 269df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 270df8bae1dSRodney W. Grimes * allocate another. 271df8bae1dSRodney W. Grimes */ 272797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 2732166ffe8SRobert Watson if (m == NULL) 274df8bae1dSRodney W. Grimes senderr(ENOBUFS); 275df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 27694a5d9b6SDavid Greenman (void)memcpy(&eh->ether_type, &type, 277df8bae1dSRodney W. Grimes sizeof(eh->ether_type)); 27894a5d9b6SDavid Greenman (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); 279114ae644SMike Smith if (hdrcmplt) 280114ae644SMike Smith (void)memcpy(eh->ether_shost, esrc, 281114ae644SMike Smith sizeof(eh->ether_shost)); 282114ae644SMike Smith else 28349572c5bSLuigi Rizzo (void)memcpy(eh->ether_shost, IFP2AC(ifp)->ac_enaddr, 284df8bae1dSRodney W. Grimes sizeof(eh->ether_shost)); 285ed7509acSJulian Elischer 286ed7509acSJulian Elischer /* 287ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 288ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 289ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 290ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 291ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 292ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 293ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 294ed7509acSJulian Elischer */ 2954c8e8c05SJulian Elischer if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 2963cd67511SJesper Skriver int csum_flags = 0; 2973cd67511SJesper Skriver 2983cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_IP) 2993cd67511SJesper Skriver csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 3003cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 3013cd67511SJesper Skriver csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 30206f684b0SMatthew N. Dodd 3039d3f194dSJulian Elischer if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 30406f684b0SMatthew N. Dodd struct mbuf *n; 305ed7509acSJulian Elischer 30679db6ff3SArchie Cobbs if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 3073cd67511SJesper Skriver n->m_pkthdr.csum_flags |= csum_flags; 3083cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3093cd67511SJesper Skriver n->m_pkthdr.csum_data = 0xffff; 31006a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 311c1404dc0SArchie Cobbs } else 312c1404dc0SArchie Cobbs ifp->if_iqdrops++; 31306f684b0SMatthew N. Dodd } else if (bcmp(eh->ether_dhost, eh->ether_shost, 31406f684b0SMatthew N. Dodd ETHER_ADDR_LEN) == 0) { 3153cd67511SJesper Skriver m->m_pkthdr.csum_flags |= csum_flags; 3163cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3173cd67511SJesper Skriver m->m_pkthdr.csum_data = 0xffff; 31806a429a3SArchie Cobbs (void) if_simloop(ifp, m, dst->sa_family, hlen); 319ed7509acSJulian Elischer return (0); /* XXX */ 320ed7509acSJulian Elischer } 321ed7509acSJulian Elischer } 3222e2de7f2SArchie Cobbs 323a9771948SGleb Smirnoff #ifdef DEV_CARP 324a9771948SGleb Smirnoff if (ifp->if_carp && 325a9771948SGleb Smirnoff (error = carp_output(ifp, m, dst, NULL))) 326a9771948SGleb Smirnoff goto bad; 327a9771948SGleb Smirnoff #endif 328a9771948SGleb Smirnoff 329e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 330eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 331e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 332e1e1452dSArchie Cobbs bad: if (m != NULL) 333e1e1452dSArchie Cobbs m_freem(m); 334e1e1452dSArchie Cobbs return (error); 335e1e1452dSArchie Cobbs } 336e1e1452dSArchie Cobbs if (m == NULL) 337e1e1452dSArchie Cobbs return (0); 338e1e1452dSArchie Cobbs } 339e1e1452dSArchie Cobbs 340e1e1452dSArchie Cobbs /* Continue with link-layer output */ 341e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 342e1e1452dSArchie Cobbs } 343e1e1452dSArchie Cobbs 344e1e1452dSArchie Cobbs /* 345e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 346e1e1452dSArchie Cobbs * 347e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 348e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 349e1e1452dSArchie Cobbs */ 350e1e1452dSArchie Cobbs int 351c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 352e1e1452dSArchie Cobbs { 353d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 354ac9d7e26SMax Laier struct ip_fw *rule = ip_dn_claim_rule(m); 355d7647d96SDag-Erling Smørgrav #else 356d7647d96SDag-Erling Smørgrav void *rule = NULL; 357d7647d96SDag-Erling Smørgrav #endif 358affc907dSMax Laier int error; 3592b25acc1SLuigi Rizzo 360c1d93b05SSam Leffler if (rule == NULL && BDG_ACTIVE(ifp)) { 361c1d93b05SSam Leffler /* 362c1d93b05SSam Leffler * Beware, the bridge code notices the null rcvif and 363c1d93b05SSam Leffler * uses that identify that it's being called from 364c1d93b05SSam Leffler * ether_output as opposd to ether_input. Yech. 365c1d93b05SSam Leffler */ 366fb5fbe46SLuigi Rizzo m->m_pkthdr.rcvif = NULL; 367c1d93b05SSam Leffler m = bdg_forward_ptr(m, ifp); 3682e2de7f2SArchie Cobbs if (m != NULL) 3692e2de7f2SArchie Cobbs m_freem(m); 3701db59ce6SEivind Eklund return (0); 371fb5fbe46SLuigi Rizzo } 372d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 3734b984093SLuigi Rizzo if (IPFW_LOADED && ether_ipfw != 0) { 374c1d93b05SSam Leffler if (ether_ipfw_chk(&m, ifp, &rule, 0) == 0) { 3754b984093SLuigi Rizzo if (m) { 3764b984093SLuigi Rizzo m_freem(m); 377e7909401SDavid Malone return EACCES; /* pkt dropped */ 3784b984093SLuigi Rizzo } else 3794b984093SLuigi Rizzo return 0; /* consumed e.g. in a pipe */ 3804b984093SLuigi Rizzo } 3814b984093SLuigi Rizzo } 382d7647d96SDag-Erling Smørgrav #endif 3832b25acc1SLuigi Rizzo 384df8bae1dSRodney W. Grimes /* 385df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 386df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 387df8bae1dSRodney W. Grimes */ 388affc907dSMax Laier IFQ_HANDOFF(ifp, m, error); 389affc907dSMax Laier return (error); 390df8bae1dSRodney W. Grimes } 391df8bae1dSRodney W. Grimes 392d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 393df8bae1dSRodney W. Grimes /* 3944b984093SLuigi Rizzo * ipfw processing for ethernet packets (in and out). 3954b984093SLuigi Rizzo * The second parameter is NULL from ether_demux, and ifp from 3964b984093SLuigi Rizzo * ether_output_frame. This section of code could be used from 3972f8ebbf4SLuigi Rizzo * bridge.c as well as long as we use some extra info 3984b984093SLuigi Rizzo * to distinguish that case from ether_output_frame(); 3994b984093SLuigi Rizzo */ 4004b984093SLuigi Rizzo int 4014b984093SLuigi Rizzo ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, 402c1d93b05SSam Leffler struct ip_fw **rule, int shared) 4034b984093SLuigi Rizzo { 404c1d93b05SSam Leffler struct ether_header *eh; 405c1d93b05SSam Leffler struct ether_header save_eh; 406c1d93b05SSam Leffler struct mbuf *m; 4074b984093SLuigi Rizzo int i; 4082b25acc1SLuigi Rizzo struct ip_fw_args args; 4094b984093SLuigi Rizzo 41097850a5dSLuigi Rizzo if (*rule != NULL && fw_one_pass) 411015d72e0SLuigi Rizzo return 1; /* dummynet packet, already partially processed */ 4122f8ebbf4SLuigi Rizzo 4134b984093SLuigi Rizzo /* 4142f8ebbf4SLuigi Rizzo * I need some amt of data to be contiguous, and in case others need 4154b984093SLuigi Rizzo * the packet (shared==1) also better be in the first mbuf. 4164b984093SLuigi Rizzo */ 417c1d93b05SSam Leffler m = *m0; 418c1d93b05SSam Leffler i = min( m->m_pkthdr.len, max_protohdr); 419c1d93b05SSam Leffler if ( shared || m->m_len < i) { 420c1d93b05SSam Leffler m = m_pullup(m, i); 421c1d93b05SSam Leffler if (m == NULL) { 422c1d93b05SSam Leffler *m0 = m; 4234b984093SLuigi Rizzo return 0; 4244b984093SLuigi Rizzo } 425c1d93b05SSam Leffler } 426c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 427c1d93b05SSam Leffler save_eh = *eh; /* save copy for restore below */ 428c1d93b05SSam Leffler m_adj(m, ETHER_HDR_LEN); /* strip ethernet header */ 4294b984093SLuigi Rizzo 430c1d93b05SSam Leffler args.m = m; /* the packet we are looking at */ 4312b25acc1SLuigi Rizzo args.oif = dst; /* destination, if any */ 4322b25acc1SLuigi Rizzo args.rule = *rule; /* matching rule to restart */ 4332b25acc1SLuigi Rizzo args.next_hop = NULL; /* we do not support forward yet */ 4342b25acc1SLuigi Rizzo args.eh = &save_eh; /* MAC header for bridged/MAC packets */ 4352b25acc1SLuigi Rizzo i = ip_fw_chk_ptr(&args); 436c1d93b05SSam Leffler m = args.m; 437c1d93b05SSam Leffler if (m != NULL) { 438c1d93b05SSam Leffler /* 439c1d93b05SSam Leffler * Restore Ethernet header, as needed, in case the 440c1d93b05SSam Leffler * mbuf chain was replaced by ipfw. 441c1d93b05SSam Leffler */ 442a163d034SWarner Losh M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 443c1d93b05SSam Leffler if (m == NULL) { 444c1d93b05SSam Leffler *m0 = m; 445c1d93b05SSam Leffler return 0; 446c1d93b05SSam Leffler } 447c1d93b05SSam Leffler if (eh != mtod(m, struct ether_header *)) 448c1d93b05SSam Leffler bcopy(&save_eh, mtod(m, struct ether_header *), 449c1d93b05SSam Leffler ETHER_HDR_LEN); 450c1d93b05SSam Leffler } 451c1d93b05SSam Leffler *m0 = m; 4522b25acc1SLuigi Rizzo *rule = args.rule; 4532b25acc1SLuigi Rizzo 4546c69a7c3SGleb Smirnoff if (i == IP_FW_DENY) /* drop */ 4554b984093SLuigi Rizzo return 0; 4564b984093SLuigi Rizzo 4576c69a7c3SGleb Smirnoff KASSERT(m != NULL, ("ether_ipfw_chk: m is NULL")); 4586c69a7c3SGleb Smirnoff 4596c69a7c3SGleb Smirnoff if (i == IP_FW_PASS) /* a PASS rule. */ 4604b984093SLuigi Rizzo return 1; 4614b984093SLuigi Rizzo 4626c69a7c3SGleb Smirnoff if (DUMMYNET_LOADED && (i == IP_FW_DUMMYNET)) { 4634b984093SLuigi Rizzo /* 4644b984093SLuigi Rizzo * Pass the pkt to dummynet, which consumes it. 4654b984093SLuigi Rizzo * If shared, make a copy and keep the original. 4664b984093SLuigi Rizzo */ 4674b984093SLuigi Rizzo if (shared) { 468a163d034SWarner Losh m = m_copypacket(m, M_DONTWAIT); 4692b25acc1SLuigi Rizzo if (m == NULL) 4704b984093SLuigi Rizzo return 0; 4714b984093SLuigi Rizzo } else { 4722b25acc1SLuigi Rizzo /* 473c1d93b05SSam Leffler * Pass the original to dummynet and 474c1d93b05SSam Leffler * nothing back to the caller 4752b25acc1SLuigi Rizzo */ 476c1d93b05SSam Leffler *m0 = NULL ; 4774b984093SLuigi Rizzo } 47828935658SGleb Smirnoff ip_dn_io_ptr(m, dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args); 4794b984093SLuigi Rizzo return 0; 4804b984093SLuigi Rizzo } 4814b984093SLuigi Rizzo /* 4822f8ebbf4SLuigi Rizzo * XXX at some point add support for divert/forward actions. 4832f8ebbf4SLuigi Rizzo * If none of the above matches, we have to drop the pkt. 4844b984093SLuigi Rizzo */ 4854b984093SLuigi Rizzo return 0; 4864b984093SLuigi Rizzo } 487d7647d96SDag-Erling Smørgrav #endif 4884b984093SLuigi Rizzo 4894b984093SLuigi Rizzo /* 490c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 491c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 492df8bae1dSRodney W. Grimes */ 493c1d93b05SSam Leffler static void 494c1d93b05SSam Leffler ether_input(struct ifnet *ifp, struct mbuf *m) 495df8bae1dSRodney W. Grimes { 496c1d93b05SSam Leffler struct ether_header *eh; 497c1d93b05SSam Leffler u_short etype; 498df8bae1dSRodney W. Grimes 499c1d93b05SSam Leffler /* 500c1d93b05SSam Leffler * Do consistency checks to verify assumptions 501c1d93b05SSam Leffler * made by code past this point. 502c1d93b05SSam Leffler */ 503c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 504c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 505c1d93b05SSam Leffler ifp->if_ierrors++; 506c939f1aeSLuigi Rizzo m_freem(m); 507c939f1aeSLuigi Rizzo return; 508c939f1aeSLuigi Rizzo } 509797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 510c1d93b05SSam Leffler /* XXX maybe should pullup? */ 511c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 512c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 513c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 514c1d93b05SSam Leffler ifp->if_ierrors++; 515c1d93b05SSam Leffler m_freem(m); 516c1d93b05SSam Leffler return; 5172e2de7f2SArchie Cobbs } 518c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 519c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 520c1d93b05SSam Leffler if (m->m_pkthdr.len > 521c1d93b05SSam Leffler ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 522c1d93b05SSam Leffler if_printf(ifp, "discard oversize frame " 523c1d93b05SSam Leffler "(ether type %x flags %x len %u > max %lu)\n", 524c1d93b05SSam Leffler etype, m->m_flags, m->m_pkthdr.len, 525c1d93b05SSam Leffler ETHER_MAX_FRAME(ifp, etype, 526c1d93b05SSam Leffler m->m_flags & M_HASFCS)); 527c1d93b05SSam Leffler ifp->if_ierrors++; 528c1d93b05SSam Leffler m_freem(m); 529c1d93b05SSam Leffler return; 530c1d93b05SSam Leffler } 531c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 532c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 533c1d93b05SSam Leffler ifp->if_ierrors++; 534c1d93b05SSam Leffler m_freem(m); 535c1d93b05SSam Leffler return; 536c1d93b05SSam Leffler } 537c1d93b05SSam Leffler #ifdef DIAGNOSTIC 538c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 5399bf40edeSBrooks Davis if_printf(ifp, "Warning, frame marked as received on %s\n", 5409bf40edeSBrooks Davis m->m_pkthdr.rcvif->if_xname); 541c1d93b05SSam Leffler } 542c1d93b05SSam Leffler #endif 543c1d93b05SSam Leffler 544533d8562SRobert Watson #ifdef MAC 545533d8562SRobert Watson /* 546533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 547533d8562SRobert Watson * consumers can get to it. 548533d8562SRobert Watson */ 549533d8562SRobert Watson mac_create_mbuf_from_ifnet(ifp, m); 550533d8562SRobert Watson #endif 551533d8562SRobert Watson 552c1d93b05SSam Leffler /* 553c1d93b05SSam Leffler * Give bpf a chance at the packet. 554c1d93b05SSam Leffler */ 555c1d93b05SSam Leffler BPF_MTAP(ifp, m); 5562e2de7f2SArchie Cobbs 557afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) { 558c1d93b05SSam Leffler /* 559c1d93b05SSam Leffler * Interface marked for monitoring; discard packet. 560c1d93b05SSam Leffler */ 561afbe3a0fSPoul-Henning Kamp m_freem(m); 562afbe3a0fSPoul-Henning Kamp return; 563afbe3a0fSPoul-Henning Kamp } 564afbe3a0fSPoul-Henning Kamp 565c1d93b05SSam Leffler /* If the CRC is still on the packet, trim it off. */ 566c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 567c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 568c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 569c1d93b05SSam Leffler } 570c1d93b05SSam Leffler 571c1d93b05SSam Leffler ifp->if_ibytes += m->m_pkthdr.len; 57205463bb5SDavid Greenman 573e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 574eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 575c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 576e1e1452dSArchie Cobbs if (m == NULL) 577e1e1452dSArchie Cobbs return; 578e1e1452dSArchie Cobbs } 579e1e1452dSArchie Cobbs 5802e2de7f2SArchie Cobbs /* Check for bridging mode */ 581a176c2aeSGleb Smirnoff if (BDG_ACTIVE(ifp) ) 582a176c2aeSGleb Smirnoff if ((m = bridge_in_ptr(ifp, m)) == NULL) 5832e2de7f2SArchie Cobbs return; 5842e2de7f2SArchie Cobbs 585a6ddbff0SPoul-Henning Kamp /* First chunk of an mbuf contains good entropy */ 58610b1fde0SMark Murray if (harvest.ethernet) 58710b1fde0SMark Murray random_harvest(m, 16, 3, 0, RANDOM_NET); 588acf032f5SRobert Watson ether_demux(ifp, m); 589e1e1452dSArchie Cobbs } 590e1e1452dSArchie Cobbs 591e1e1452dSArchie Cobbs /* 592e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 593e1e1452dSArchie Cobbs */ 594e1e1452dSArchie Cobbs void 595c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 596e1e1452dSArchie Cobbs { 597c1d93b05SSam Leffler struct ether_header *eh; 5981cafed39SJonathan Lemon int isr; 599e1e1452dSArchie Cobbs u_short ether_type; 600e1e1452dSArchie Cobbs #if defined(NETATALK) 601098a8c3bSMatthew N. Dodd struct llc *l; 602e1e1452dSArchie Cobbs #endif 603d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 604ac9d7e26SMax Laier struct ip_fw *rule = ip_dn_claim_rule(m); 605d7647d96SDag-Erling Smørgrav #endif 60636e8826fSMax Laier 607c1d93b05SSam Leffler KASSERT(ifp != NULL, ("ether_demux: NULL interface pointer")); 608c1d93b05SSam Leffler 609c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 610cd0cd014SJoerg Wunsch ether_type = ntohs(eh->ether_type); 611c1d93b05SSam Leffler 612d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 6132b25acc1SLuigi Rizzo if (rule) /* packet was already bridged */ 6142b25acc1SLuigi Rizzo goto post_stats; 615d7647d96SDag-Erling Smørgrav #endif 6164b984093SLuigi Rizzo 617cd0cd014SJoerg Wunsch if (!(BDG_ACTIVE(ifp)) && 6186ee20ab5SRuslan Ermilov !((ether_type == ETHERTYPE_VLAN || m->m_flags & M_VLANTAG) && 6196ee20ab5SRuslan Ermilov ifp->if_nvlans > 0)) { 620a9771948SGleb Smirnoff #ifdef DEV_CARP 621a9771948SGleb Smirnoff /* 622a9771948SGleb Smirnoff * XXX: Okay, we need to call carp_forus() and - if it is for us 623a9771948SGleb Smirnoff * jump over code that does the normal check 624a9771948SGleb Smirnoff * "ac_enaddr == ether_dhost". The check sequence is a bit 625a9771948SGleb Smirnoff * different from OpenBSD, so we jump over as few code as possible, 626a9771948SGleb Smirnoff * to catch _all_ sanity checks. This needs evaluation, to see if 627a9771948SGleb Smirnoff * the carp ether_dhost values break any of these checks! 628a9771948SGleb Smirnoff */ 629a9771948SGleb Smirnoff if (ifp->if_carp && carp_forus(ifp->if_carp, eh->ether_dhost)) 630a9771948SGleb Smirnoff goto pre_stats; 631a9771948SGleb Smirnoff #endif 632c6943100SPoul-Henning Kamp /* 633c6943100SPoul-Henning Kamp * Discard packet if upper layers shouldn't see it because it 634c6943100SPoul-Henning Kamp * was unicast to a different Ethernet address. If the driver 635c6943100SPoul-Henning Kamp * is working properly, then this situation can only happen 636c6943100SPoul-Henning Kamp * when the interface is in promiscuous mode. 637cd0cd014SJoerg Wunsch * 638cd0cd014SJoerg Wunsch * If VLANs are active, and this packet has a VLAN tag, do 639cd0cd014SJoerg Wunsch * not drop it here but pass it on to the VLAN layer, to 640cd0cd014SJoerg Wunsch * give them a chance to consider it as well (e. g. in case 641cd0cd014SJoerg Wunsch * bridging is only active on a VLAN). They will drop it if 642cd0cd014SJoerg Wunsch * it's undesired. 643c6943100SPoul-Henning Kamp */ 644cb24f323SArchie Cobbs if ((ifp->if_flags & IFF_PROMISC) != 0 6456ee20ab5SRuslan Ermilov && !ETHER_IS_MULTICAST(eh->ether_dhost) 646cb24f323SArchie Cobbs && bcmp(eh->ether_dhost, 647ffb079beSMaxim Sobolev IFP2AC(ifp)->ac_enaddr, ETHER_ADDR_LEN) != 0 64825faf49dSMaxim Sobolev && (ifp->if_flags & IFF_PPROMISC) == 0) { 649cb24f323SArchie Cobbs m_freem(m); 650cb24f323SArchie Cobbs return; 651cb24f323SArchie Cobbs } 652c6943100SPoul-Henning Kamp } 653cb24f323SArchie Cobbs 654a9771948SGleb Smirnoff #ifdef DEV_CARP 655a9771948SGleb Smirnoff pre_stats: 656a9771948SGleb Smirnoff #endif 6572e2de7f2SArchie Cobbs /* Discard packet if interface is not up */ 658df8bae1dSRodney W. Grimes if ((ifp->if_flags & IFF_UP) == 0) { 659df8bae1dSRodney W. Grimes m_freem(m); 660df8bae1dSRodney W. Grimes return; 661df8bae1dSRodney W. Grimes } 662588523faSSam Leffler if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 66364760eb0SWarner Losh if (bcmp(etherbroadcastaddr, eh->ether_dhost, 664df8bae1dSRodney W. Grimes sizeof(etherbroadcastaddr)) == 0) 665df8bae1dSRodney W. Grimes m->m_flags |= M_BCAST; 6662cc2df49SGarrett Wollman else 667df8bae1dSRodney W. Grimes m->m_flags |= M_MCAST; 6682cc2df49SGarrett Wollman } 669df8bae1dSRodney W. Grimes if (m->m_flags & (M_BCAST|M_MCAST)) 670df8bae1dSRodney W. Grimes ifp->if_imcasts++; 671df8bae1dSRodney W. Grimes 672d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 6734b984093SLuigi Rizzo post_stats: 6744b984093SLuigi Rizzo if (IPFW_LOADED && ether_ipfw != 0) { 675c1d93b05SSam Leffler if (ether_ipfw_chk(&m, NULL, &rule, 0) == 0) { 6764b984093SLuigi Rizzo if (m) 6774b984093SLuigi Rizzo m_freem(m); 6784b984093SLuigi Rizzo return; 6794b984093SLuigi Rizzo } 6804b984093SLuigi Rizzo } 681d7647d96SDag-Erling Smørgrav #endif 6824b984093SLuigi Rizzo 683c1d93b05SSam Leffler /* 6846c23e6ccSRuslan Ermilov * Check to see if the device performed the VLAN decapsulation and 685c1d93b05SSam Leffler * provided us with the tag. 686c1d93b05SSam Leffler */ 6876ee20ab5SRuslan Ermilov if (m->m_flags & M_VLANTAG) { 688c1d93b05SSam Leffler /* 6896c23e6ccSRuslan Ermilov * If no VLANs are configured, drop. 6906c23e6ccSRuslan Ermilov */ 6916c23e6ccSRuslan Ermilov if (ifp->if_nvlans == 0) { 6926c23e6ccSRuslan Ermilov ifp->if_noproto++; 6936c23e6ccSRuslan Ermilov m_freem(m); 6946c23e6ccSRuslan Ermilov return; 6956c23e6ccSRuslan Ermilov } 6966c23e6ccSRuslan Ermilov /* 697c1d93b05SSam Leffler * vlan_input() will either recursively call ether_input() 698c1d93b05SSam Leffler * or drop the packet. 699c1d93b05SSam Leffler */ 700c1d93b05SSam Leffler KASSERT(vlan_input_p != NULL,("ether_input: VLAN not loaded!")); 701c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 702c1d93b05SSam Leffler return; 703c1d93b05SSam Leffler } 704c1d93b05SSam Leffler 705c1d93b05SSam Leffler /* 706c1d93b05SSam Leffler * Handle protocols that expect to have the Ethernet header 707c1d93b05SSam Leffler * (and possibly FCS) intact. 708c1d93b05SSam Leffler */ 709c1d93b05SSam Leffler switch (ether_type) { 710c1d93b05SSam Leffler case ETHERTYPE_VLAN: 711c1d93b05SSam Leffler if (ifp->if_nvlans != 0) { 712c1d93b05SSam Leffler KASSERT(vlan_input_p,("ether_input: VLAN not loaded!")); 713c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 714c1d93b05SSam Leffler } else { 715c1d93b05SSam Leffler ifp->if_noproto++; 716c1d93b05SSam Leffler m_freem(m); 717c1d93b05SSam Leffler } 718c1d93b05SSam Leffler return; 719c1d93b05SSam Leffler } 720c1d93b05SSam Leffler 721c1d93b05SSam Leffler /* Strip off Ethernet header. */ 722797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 723c1d93b05SSam Leffler 724c1d93b05SSam Leffler /* If the CRC is still on the packet, trim it off. */ 725c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 726c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 727c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 728c1d93b05SSam Leffler } 729c1d93b05SSam Leffler 730307d80beSDavid Greenman switch (ether_type) { 731df8bae1dSRodney W. Grimes #ifdef INET 732df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 7339188b4a1SAndre Oppermann if (ip_fastforward(m)) 7341f91d8c5SDavid Greenman return; 7351cafed39SJonathan Lemon isr = NETISR_IP; 736df8bae1dSRodney W. Grimes break; 737df8bae1dSRodney W. Grimes 738df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 73908aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 74008aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 74108aadfbbSJonathan Lemon m_freem(m); 74208aadfbbSJonathan Lemon return; 74308aadfbbSJonathan Lemon } 7441cafed39SJonathan Lemon isr = NETISR_ARP; 745df8bae1dSRodney W. Grimes break; 746df8bae1dSRodney W. Grimes #endif 747cc6a66f2SJulian Elischer #ifdef IPX 748cc6a66f2SJulian Elischer case ETHERTYPE_IPX: 7494f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 7504f93599fSBoris Popov return; 7511cafed39SJonathan Lemon isr = NETISR_IPX; 752cc6a66f2SJulian Elischer break; 753cc6a66f2SJulian Elischer #endif 75482cd038dSYoshinobu Inoue #ifdef INET6 75582cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 7561cafed39SJonathan Lemon isr = NETISR_IPV6; 75782cd038dSYoshinobu Inoue break; 75882cd038dSYoshinobu Inoue #endif 759655929bfSJulian Elischer #ifdef NETATALK 760655929bfSJulian Elischer case ETHERTYPE_AT: 7611cafed39SJonathan Lemon isr = NETISR_ATALK1; 762655929bfSJulian Elischer break; 763655929bfSJulian Elischer case ETHERTYPE_AARP: 7641cafed39SJonathan Lemon isr = NETISR_AARP; 7651cafed39SJonathan Lemon break; 7668cdfefbdSPeter Wemm #endif /* NETATALK */ 767df8bae1dSRodney W. Grimes default: 7684f93599fSBoris Popov #ifdef IPX 7694f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 7704f93599fSBoris Popov return; 7714f93599fSBoris Popov #endif /* IPX */ 772242c5536SPeter Wemm #if defined(NETATALK) 773307d80beSDavid Greenman if (ether_type > ETHERMTU) 774c1d93b05SSam Leffler goto discard; 775df8bae1dSRodney W. Grimes l = mtod(m, struct llc *); 7761cafed39SJonathan Lemon if (l->llc_dsap == LLC_SNAP_LSAP && 7771cafed39SJonathan Lemon l->llc_ssap == LLC_SNAP_LSAP && 7781cafed39SJonathan Lemon l->llc_control == LLC_UI) { 7794158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], at_org_code, 780655929bfSJulian Elischer sizeof(at_org_code)) == 0 && 781655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 782797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 7831cafed39SJonathan Lemon isr = NETISR_ATALK2; 784655929bfSJulian Elischer break; 785655929bfSJulian Elischer } 7864158372fSLuigi Rizzo if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 787655929bfSJulian Elischer sizeof(aarp_org_code)) == 0 && 788655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 789797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 7901cafed39SJonathan Lemon isr = NETISR_AARP; 791655929bfSJulian Elischer break; 792df8bae1dSRodney W. Grimes } 7931cafed39SJonathan Lemon } 794242c5536SPeter Wemm #endif /* NETATALK */ 7951cafed39SJonathan Lemon goto discard; 796df8bae1dSRodney W. Grimes } 7971cafed39SJonathan Lemon netisr_dispatch(isr, m); 798c1d93b05SSam Leffler return; 7991cafed39SJonathan Lemon 800c1d93b05SSam Leffler discard: 801c1d93b05SSam Leffler /* 802c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 803c1d93b05SSam Leffler * hand the packet to it for last chance processing; 804c1d93b05SSam Leffler * otherwise dispose of it. 805c1d93b05SSam Leffler */ 806eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) { 807c1d93b05SSam Leffler /* 808c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 809c1d93b05SSam Leffler * consistent view of inbound packets. 810c1d93b05SSam Leffler */ 811797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 812c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 813c1d93b05SSam Leffler return; 814c1d93b05SSam Leffler } 815c1d93b05SSam Leffler m_freem(m); 816c1d93b05SSam Leffler } 817c1d93b05SSam Leffler 818c1d93b05SSam Leffler /* 819c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 820c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 821c1d93b05SSam Leffler * 822c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 823c1d93b05SSam Leffler * 824c1d93b05SSam Leffler * since there's no static buffer involved. 825c1d93b05SSam Leffler */ 826c1d93b05SSam Leffler char * 827c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 828c1d93b05SSam Leffler { 829c1d93b05SSam Leffler static char etherbuf[18]; 830c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 831c1d93b05SSam Leffler return (etherbuf); 832df8bae1dSRodney W. Grimes } 833df8bae1dSRodney W. Grimes 834df8bae1dSRodney W. Grimes /* 835df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 836df8bae1dSRodney W. Grimes */ 837df8bae1dSRodney W. Grimes void 838c1d93b05SSam Leffler ether_ifattach(struct ifnet *ifp, const u_int8_t *llc) 839df8bae1dSRodney W. Grimes { 840f93dfa28SBrooks Davis int i; 841098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 842098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 843df8bae1dSRodney W. Grimes 844df8bae1dSRodney W. Grimes ifp->if_type = IFT_ETHER; 845c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 846c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 847cfeff1b6SJonathan Lemon if_attach(ifp); 848df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 849c1d93b05SSam Leffler ifp->if_output = ether_output; 850c1d93b05SSam Leffler ifp->if_input = ether_input; 8511158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 852a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 853c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 854322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 855c1d93b05SSam Leffler 856f9132cebSJonathan Lemon ifa = ifaddr_byindex(ifp->if_index); 8576e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 85859562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 859df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 860df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 861c1d93b05SSam Leffler bcopy(llc, LLADDR(sdl), ifp->if_addrlen); 862c1d93b05SSam Leffler /* 863c1d93b05SSam Leffler * XXX: This doesn't belong here; we do it until 864c1d93b05SSam Leffler * XXX: all drivers are cleaned up 865c1d93b05SSam Leffler */ 866c1d93b05SSam Leffler if (llc != IFP2AC(ifp)->ac_enaddr) 867c1d93b05SSam Leffler bcopy(llc, IFP2AC(ifp)->ac_enaddr, ifp->if_addrlen); 868c1d93b05SSam Leffler 869797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 870e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 871e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 8727b109fa4SLuigi Rizzo if (BDG_LOADED) 873db69a05dSPaul Saab bdgtakeifaces_ptr(); 874e3bbbec2SMatthew N. Dodd 875f93dfa28SBrooks Davis /* Announce Ethernet MAC address if non-zero. */ 876f93dfa28SBrooks Davis for (i = 0; i < ifp->if_addrlen; i++) 877f93dfa28SBrooks Davis if (llc[i] != 0) 878f93dfa28SBrooks Davis break; 879f93dfa28SBrooks Davis if (i != ifp->if_addrlen) 880e3bbbec2SMatthew N. Dodd if_printf(ifp, "Ethernet address: %6D\n", llc, ":"); 881af5e59bfSRobert Watson if (debug_mpsafenet && (ifp->if_flags & IFF_NEEDSGIANT) != 0) 882af5e59bfSRobert Watson if_printf(ifp, "if_start running deferred for Giant\n"); 883e1e1452dSArchie Cobbs } 884e1e1452dSArchie Cobbs 88521b8ebd9SArchie Cobbs /* 88621b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 88721b8ebd9SArchie Cobbs */ 88821b8ebd9SArchie Cobbs void 889c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 89021b8ebd9SArchie Cobbs { 891eb46c866SGleb Smirnoff if (IFP2AC(ifp)->ac_netgraph != NULL) 89221b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 89321b8ebd9SArchie Cobbs bpfdetach(ifp); 89421b8ebd9SArchie Cobbs if_detach(ifp); 8957b109fa4SLuigi Rizzo if (BDG_LOADED) 896db69a05dSPaul Saab bdgtakeifaces_ptr(); 89721b8ebd9SArchie Cobbs } 89821b8ebd9SArchie Cobbs 899ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 900602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 901d7647d96SDag-Erling Smørgrav #if defined(INET) || defined(INET6) 9024b984093SLuigi Rizzo SYSCTL_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW, 9034b984093SLuigi Rizzo ðer_ipfw,0,"Pass ether pkts through firewall"); 904d7647d96SDag-Erling Smørgrav #endif 90530106f6aSPoul-Henning Kamp 90616b4a343SChristian Weisgerber #if 0 90716b4a343SChristian Weisgerber /* 90816b4a343SChristian Weisgerber * This is for reference. We have a table-driven version 90916b4a343SChristian Weisgerber * of the little-endian crc32 generator, which is faster 91016b4a343SChristian Weisgerber * than the double-loop. 91116b4a343SChristian Weisgerber */ 91216b4a343SChristian Weisgerber uint32_t 91316b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 91416b4a343SChristian Weisgerber { 91516b4a343SChristian Weisgerber size_t i; 91616b4a343SChristian Weisgerber uint32_t crc; 91716b4a343SChristian Weisgerber int bit; 91816b4a343SChristian Weisgerber uint8_t data; 91916b4a343SChristian Weisgerber 92016b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 92116b4a343SChristian Weisgerber 92216b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 92316b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) 92416b4a343SChristian Weisgerber carry = (crc ^ data) & 1; 92516b4a343SChristian Weisgerber crc >>= 1; 92616b4a343SChristian Weisgerber if (carry) 92716b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_LE); 92816b4a343SChristian Weisgerber } 92916b4a343SChristian Weisgerber 93016b4a343SChristian Weisgerber return (crc); 93116b4a343SChristian Weisgerber } 93216b4a343SChristian Weisgerber #else 93316b4a343SChristian Weisgerber uint32_t 93416b4a343SChristian Weisgerber ether_crc32_le(const uint8_t *buf, size_t len) 93516b4a343SChristian Weisgerber { 93616b4a343SChristian Weisgerber static const uint32_t crctab[] = { 93716b4a343SChristian Weisgerber 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 93816b4a343SChristian Weisgerber 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 93916b4a343SChristian Weisgerber 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 94016b4a343SChristian Weisgerber 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 94116b4a343SChristian Weisgerber }; 94216b4a343SChristian Weisgerber size_t i; 94316b4a343SChristian Weisgerber uint32_t crc; 94416b4a343SChristian Weisgerber 94516b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 94616b4a343SChristian Weisgerber 94716b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 94816b4a343SChristian Weisgerber crc ^= buf[i]; 94916b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 95016b4a343SChristian Weisgerber crc = (crc >> 4) ^ crctab[crc & 0xf]; 95116b4a343SChristian Weisgerber } 95216b4a343SChristian Weisgerber 95316b4a343SChristian Weisgerber return (crc); 95416b4a343SChristian Weisgerber } 95516b4a343SChristian Weisgerber #endif 95616b4a343SChristian Weisgerber 95716b4a343SChristian Weisgerber uint32_t 95816b4a343SChristian Weisgerber ether_crc32_be(const uint8_t *buf, size_t len) 95916b4a343SChristian Weisgerber { 96016b4a343SChristian Weisgerber size_t i; 96116b4a343SChristian Weisgerber uint32_t crc, carry; 96216b4a343SChristian Weisgerber int bit; 96316b4a343SChristian Weisgerber uint8_t data; 96416b4a343SChristian Weisgerber 96516b4a343SChristian Weisgerber crc = 0xffffffff; /* initial value */ 96616b4a343SChristian Weisgerber 96716b4a343SChristian Weisgerber for (i = 0; i < len; i++) { 96816b4a343SChristian Weisgerber for (data = *buf++, bit = 0; bit < 8; bit++, data >>= 1) { 96916b4a343SChristian Weisgerber carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); 97016b4a343SChristian Weisgerber crc <<= 1; 97116b4a343SChristian Weisgerber if (carry) 97216b4a343SChristian Weisgerber crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 97316b4a343SChristian Weisgerber } 97416b4a343SChristian Weisgerber } 97516b4a343SChristian Weisgerber 97616b4a343SChristian Weisgerber return (crc); 97716b4a343SChristian Weisgerber } 97816b4a343SChristian Weisgerber 979fb583156SDavid Greenman int 98072fd1b6aSDag-Erling Smørgrav ether_ioctl(struct ifnet *ifp, int command, caddr_t data) 98130106f6aSPoul-Henning Kamp { 98230106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 98330106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 984fb583156SDavid Greenman int error = 0; 98530106f6aSPoul-Henning Kamp 98630106f6aSPoul-Henning Kamp switch (command) { 98730106f6aSPoul-Henning Kamp case SIOCSIFADDR: 98830106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 98930106f6aSPoul-Henning Kamp 99030106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 99130106f6aSPoul-Henning Kamp #ifdef INET 99230106f6aSPoul-Henning Kamp case AF_INET: 99330106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 994322dcb8dSMax Khon arp_ifinit(ifp, ifa); 99530106f6aSPoul-Henning Kamp break; 99630106f6aSPoul-Henning Kamp #endif 99730106f6aSPoul-Henning Kamp #ifdef IPX 99830106f6aSPoul-Henning Kamp /* 99930106f6aSPoul-Henning Kamp * XXX - This code is probably wrong 100030106f6aSPoul-Henning Kamp */ 100130106f6aSPoul-Henning Kamp case AF_IPX: 100230106f6aSPoul-Henning Kamp { 1003098a8c3bSMatthew N. Dodd struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 10044c8e8c05SJulian Elischer struct arpcom *ac = IFP2AC(ifp); 100530106f6aSPoul-Henning Kamp 100630106f6aSPoul-Henning Kamp if (ipx_nullhost(*ina)) 100730106f6aSPoul-Henning Kamp ina->x_host = 100886101139SPoul-Henning Kamp *(union ipx_host *) 100986101139SPoul-Henning Kamp ac->ac_enaddr; 101030106f6aSPoul-Henning Kamp else { 101130106f6aSPoul-Henning Kamp bcopy((caddr_t) ina->x_host.c_host, 101286101139SPoul-Henning Kamp (caddr_t) ac->ac_enaddr, 101386101139SPoul-Henning Kamp sizeof(ac->ac_enaddr)); 101430106f6aSPoul-Henning Kamp } 101530106f6aSPoul-Henning Kamp 101630106f6aSPoul-Henning Kamp /* 101730106f6aSPoul-Henning Kamp * Set new address 101830106f6aSPoul-Henning Kamp */ 101930106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 102030106f6aSPoul-Henning Kamp break; 102130106f6aSPoul-Henning Kamp } 102230106f6aSPoul-Henning Kamp #endif 102330106f6aSPoul-Henning Kamp default: 102430106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 102530106f6aSPoul-Henning Kamp break; 102630106f6aSPoul-Henning Kamp } 102730106f6aSPoul-Henning Kamp break; 102830106f6aSPoul-Henning Kamp 102930106f6aSPoul-Henning Kamp case SIOCGIFADDR: 103030106f6aSPoul-Henning Kamp { 103130106f6aSPoul-Henning Kamp struct sockaddr *sa; 103230106f6aSPoul-Henning Kamp 103330106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 10344c8e8c05SJulian Elischer bcopy(IFP2AC(ifp)->ac_enaddr, 103530106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 103630106f6aSPoul-Henning Kamp } 103730106f6aSPoul-Henning Kamp break; 1038fb583156SDavid Greenman 1039fb583156SDavid Greenman case SIOCSIFMTU: 1040fb583156SDavid Greenman /* 1041fb583156SDavid Greenman * Set the interface MTU. 1042fb583156SDavid Greenman */ 1043fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 1044fb583156SDavid Greenman error = EINVAL; 1045fb583156SDavid Greenman } else { 1046fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 104730106f6aSPoul-Henning Kamp } 1048fb583156SDavid Greenman break; 1049c1d93b05SSam Leffler default: 1050c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 1051c1d93b05SSam Leffler break; 1052fb583156SDavid Greenman } 1053fb583156SDavid Greenman return (error); 105430106f6aSPoul-Henning Kamp } 10551158dfb7SGarrett Wollman 105637c84183SPoul-Henning Kamp static int 105772fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 105872fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 10591158dfb7SGarrett Wollman { 10601158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 1061d7647d96SDag-Erling Smørgrav #ifdef INET 10621158dfb7SGarrett Wollman struct sockaddr_in *sin; 1063d7647d96SDag-Erling Smørgrav #endif 106482cd038dSYoshinobu Inoue #ifdef INET6 106582cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 106682cd038dSYoshinobu Inoue #endif 10671158dfb7SGarrett Wollman u_char *e_addr; 10681158dfb7SGarrett Wollman 10691158dfb7SGarrett Wollman switch(sa->sa_family) { 10701158dfb7SGarrett Wollman case AF_LINK: 10717f33a738SJulian Elischer /* 10727f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 10737f33a738SJulian Elischer */ 10741158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 10751158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 1076086e98c4SBruce M Simpson if (!ETHER_IS_MULTICAST(e_addr)) 10771158dfb7SGarrett Wollman return EADDRNOTAVAIL; 10781158dfb7SGarrett Wollman *llsa = 0; 10791158dfb7SGarrett Wollman return 0; 10801158dfb7SGarrett Wollman 10811158dfb7SGarrett Wollman #ifdef INET 10821158dfb7SGarrett Wollman case AF_INET: 10831158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 10841158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 10851158dfb7SGarrett Wollman return EADDRNOTAVAIL; 10861158dfb7SGarrett Wollman MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 1087a163d034SWarner Losh M_WAITOK|M_ZERO); 10881158dfb7SGarrett Wollman sdl->sdl_len = sizeof *sdl; 10891158dfb7SGarrett Wollman sdl->sdl_family = AF_LINK; 10901158dfb7SGarrett Wollman sdl->sdl_index = ifp->if_index; 10911158dfb7SGarrett Wollman sdl->sdl_type = IFT_ETHER; 10921158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 10931158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 10941158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 10951158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 10961158dfb7SGarrett Wollman return 0; 10971158dfb7SGarrett Wollman #endif 109882cd038dSYoshinobu Inoue #ifdef INET6 109982cd038dSYoshinobu Inoue case AF_INET6: 110082cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1101595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1102595b8a1cSJun-ichiro itojun Hagino /* 1103595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1104595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1105595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1106595b8a1cSJun-ichiro itojun Hagino */ 1107595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1108595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1109595b8a1cSJun-ichiro itojun Hagino return 0; 1110595b8a1cSJun-ichiro itojun Hagino } 111182cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 111282cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 111382cd038dSYoshinobu Inoue MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 1114a163d034SWarner Losh M_WAITOK|M_ZERO); 111582cd038dSYoshinobu Inoue sdl->sdl_len = sizeof *sdl; 111682cd038dSYoshinobu Inoue sdl->sdl_family = AF_LINK; 111782cd038dSYoshinobu Inoue sdl->sdl_index = ifp->if_index; 111882cd038dSYoshinobu Inoue sdl->sdl_type = IFT_ETHER; 111982cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 112082cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 112182cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 112282cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 112382cd038dSYoshinobu Inoue return 0; 112482cd038dSYoshinobu Inoue #endif 11251158dfb7SGarrett Wollman 11261158dfb7SGarrett Wollman default: 11271158dfb7SGarrett Wollman /* 11281158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 11291158dfb7SGarrett Wollman * that counts... 11301158dfb7SGarrett Wollman */ 11311158dfb7SGarrett Wollman return EAFNOSUPPORT; 11321158dfb7SGarrett Wollman } 11331158dfb7SGarrett Wollman } 113440811c14SMatthew N. Dodd 113540811c14SMatthew N. Dodd static moduledata_t ether_mod = { 113640811c14SMatthew N. Dodd "ether", 113740811c14SMatthew N. Dodd NULL, 113840811c14SMatthew N. Dodd 0 113940811c14SMatthew N. Dodd }; 114040811c14SMatthew N. Dodd 114140811c14SMatthew N. Dodd DECLARE_MODULE(ether, ether_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 114240811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1143