1df8bae1dSRodney W. Grimes /* 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 * 3. All advertising materials mentioning features or use of this software 14df8bae1dSRodney W. Grimes * must display the following acknowledgement: 15df8bae1dSRodney W. Grimes * This product includes software developed by the University of 16df8bae1dSRodney W. Grimes * California, Berkeley and its contributors. 17df8bae1dSRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 18df8bae1dSRodney W. Grimes * may be used to endorse or promote products derived from this software 19df8bae1dSRodney W. Grimes * without specific prior written permission. 20df8bae1dSRodney W. Grimes * 21df8bae1dSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22df8bae1dSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23df8bae1dSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24df8bae1dSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25df8bae1dSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26df8bae1dSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27df8bae1dSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28df8bae1dSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29df8bae1dSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30df8bae1dSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31df8bae1dSRodney W. Grimes * SUCH DAMAGE. 32df8bae1dSRodney W. Grimes * 33df8bae1dSRodney W. Grimes * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93 34c3aac50fSPeter Wemm * $FreeBSD$ 35df8bae1dSRodney W. Grimes */ 36df8bae1dSRodney W. Grimes 377262d3e4SEivind Eklund #include "opt_atalk.h" 381d5e9e22SEivind Eklund #include "opt_inet.h" 39cfa1ca9dSYoshinobu Inoue #include "opt_inet6.h" 40430df5f4SEivind Eklund #include "opt_ipx.h" 41fb5fbe46SLuigi Rizzo #include "opt_bdg.h" 4243b29369SRobert Watson #include "opt_mac.h" 434cf49a43SJulian Elischer #include "opt_netgraph.h" 44430df5f4SEivind Eklund 45df8bae1dSRodney W. Grimes #include <sys/param.h> 46df8bae1dSRodney W. Grimes #include <sys/systm.h> 47df8bae1dSRodney W. Grimes #include <sys/kernel.h> 4843b29369SRobert Watson #include <sys/mac.h> 49df8bae1dSRodney W. Grimes #include <sys/malloc.h> 50df8bae1dSRodney W. Grimes #include <sys/mbuf.h> 5110b1fde0SMark Murray #include <sys/random.h> 52df8bae1dSRodney W. Grimes #include <sys/socket.h> 5351a53488SBruce Evans #include <sys/sockio.h> 54602d513cSGarrett Wollman #include <sys/sysctl.h> 55df8bae1dSRodney W. Grimes 56df8bae1dSRodney W. Grimes #include <net/if.h> 57df8bae1dSRodney W. Grimes #include <net/netisr.h> 58df8bae1dSRodney W. Grimes #include <net/route.h> 59df8bae1dSRodney W. Grimes #include <net/if_llc.h> 60df8bae1dSRodney W. Grimes #include <net/if_dl.h> 61df8bae1dSRodney W. Grimes #include <net/if_types.h> 622e2de7f2SArchie Cobbs #include <net/bpf.h> 63e1e1452dSArchie Cobbs #include <net/ethernet.h> 64db69a05dSPaul Saab #include <net/bridge.h> 65c1d93b05SSam Leffler #include <net/if_vlan_var.h> 66df8bae1dSRodney W. Grimes 6782cd038dSYoshinobu Inoue #if defined(INET) || defined(INET6) 68df8bae1dSRodney W. Grimes #include <netinet/in.h> 69df8bae1dSRodney W. Grimes #include <netinet/in_var.h> 70df8bae1dSRodney W. Grimes #include <netinet/if_ether.h> 714b984093SLuigi Rizzo #include <netinet/ip_fw.h> 724b984093SLuigi Rizzo #include <netinet/ip_dummynet.h> 731d5e9e22SEivind Eklund #endif 7482cd038dSYoshinobu Inoue #ifdef INET6 7582cd038dSYoshinobu Inoue #include <netinet6/nd6.h> 7682cd038dSYoshinobu Inoue #endif 77df8bae1dSRodney W. Grimes 78cc6a66f2SJulian Elischer #ifdef IPX 79cc6a66f2SJulian Elischer #include <netipx/ipx.h> 80cc6a66f2SJulian Elischer #include <netipx/ipx_if.h> 814f93599fSBoris Popov int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m); 825accfb8cSBoris Popov int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp, 832a7e8eceSBoris Popov struct sockaddr *dst, short *tp, int *hlen); 84cc6a66f2SJulian Elischer #endif 85cc6a66f2SJulian Elischer 86655929bfSJulian Elischer #ifdef NETATALK 87655929bfSJulian Elischer #include <netatalk/at.h> 88655929bfSJulian Elischer #include <netatalk/at_var.h> 89655929bfSJulian Elischer #include <netatalk/at_extern.h> 90655929bfSJulian Elischer 91655929bfSJulian Elischer #define llc_snap_org_code llc_un.type_snap.org_code 92655929bfSJulian Elischer #define llc_snap_ether_type llc_un.type_snap.ether_type 93655929bfSJulian Elischer 94655929bfSJulian Elischer extern u_char at_org_code[3]; 95655929bfSJulian Elischer extern u_char aarp_org_code[3]; 962cc2df49SGarrett Wollman #endif /* NETATALK */ 972cc2df49SGarrett Wollman 98e1e1452dSArchie Cobbs /* netgraph node hooks for ng_ether(4) */ 99c1d93b05SSam Leffler void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp); 100c1d93b05SSam Leffler void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m); 101e1e1452dSArchie Cobbs int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 102e1e1452dSArchie Cobbs void (*ng_ether_attach_p)(struct ifnet *ifp); 103e1e1452dSArchie Cobbs void (*ng_ether_detach_p)(struct ifnet *ifp); 104e1e1452dSArchie Cobbs 105824eb9dcSDavid E. O'Brien void (*vlan_input_p)(struct ifnet *, struct mbuf *); 1069d4fe4b2SBrooks Davis 107db69a05dSPaul Saab /* bridge support */ 108cad15830SLuigi Rizzo int do_bridge; 109db69a05dSPaul Saab bridge_in_t *bridge_in_ptr; 110db69a05dSPaul Saab bdg_forward_t *bdg_forward_ptr; 111db69a05dSPaul Saab bdgtakeifaces_t *bdgtakeifaces_ptr; 112cad15830SLuigi Rizzo struct bdg_softc *ifp2sc; 113db69a05dSPaul Saab 114e589108dSRobert Watson static const u_char etherbroadcastaddr[ETHER_ADDR_LEN] = 115868d8b62SMatthew N. Dodd { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 116868d8b62SMatthew N. Dodd 117929ddbbbSAlfred Perlstein static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 118929ddbbbSAlfred Perlstein struct sockaddr *); 119868d8b62SMatthew N. Dodd 1204c8e8c05SJulian Elischer #define senderr(e) do { error = (e); goto bad;} while (0) 1214c8e8c05SJulian Elischer #define IFP2AC(IFP) ((struct arpcom *)IFP) 122df8bae1dSRodney W. Grimes 1234b984093SLuigi Rizzo int 1244b984093SLuigi Rizzo ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, 125c1d93b05SSam Leffler struct ip_fw **rule, int shared); 1264b984093SLuigi Rizzo static int ether_ipfw; 1274b984093SLuigi Rizzo 128df8bae1dSRodney W. Grimes /* 129df8bae1dSRodney W. Grimes * Ethernet output routine. 130df8bae1dSRodney W. Grimes * Encapsulate a packet of type family for the local net. 131df8bae1dSRodney W. Grimes * Use trailer local net encapsulation if enough data in first 132df8bae1dSRodney W. Grimes * packet leaves a multiple of 512 bytes of data in remainder. 133df8bae1dSRodney W. Grimes * Assumes that ifp is actually pointer to arpcom structure. 134df8bae1dSRodney W. Grimes */ 135df8bae1dSRodney W. Grimes int 13672fd1b6aSDag-Erling Smørgrav ether_output(struct ifnet *ifp, struct mbuf *m, 13772fd1b6aSDag-Erling Smørgrav struct sockaddr *dst, struct rtentry *rt0) 138df8bae1dSRodney W. Grimes { 139df8bae1dSRodney W. Grimes short type; 140e1e1452dSArchie Cobbs int error = 0, hdrcmplt = 0; 14164760eb0SWarner Losh u_char esrc[ETHER_ADDR_LEN], edst[ETHER_ADDR_LEN]; 142098a8c3bSMatthew N. Dodd struct rtentry *rt; 143098a8c3bSMatthew N. Dodd struct ether_header *eh; 1449961e27dSLuigi Rizzo int loop_copy = 0; 145d32864c3SRobert Watson int hlen; /* link layer header length */ 1464c8e8c05SJulian Elischer struct arpcom *ac = IFP2AC(ifp); 147df8bae1dSRodney W. Grimes 14843b29369SRobert Watson #ifdef MAC 14943b29369SRobert Watson error = mac_check_ifnet_transmit(ifp, m); 15043b29369SRobert Watson if (error) 15143b29369SRobert Watson senderr(error); 15243b29369SRobert Watson #endif 15343b29369SRobert Watson 154afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 155afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 156df8bae1dSRodney W. Grimes if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 157df8bae1dSRodney W. Grimes senderr(ENETDOWN); 1587f760c48SMatthew N. Dodd 1597f760c48SMatthew N. Dodd error = rt_check(&rt, &rt0, dst); 1607f760c48SMatthew N. Dodd if (error) 1617f760c48SMatthew N. Dodd goto bad; 1627f760c48SMatthew N. Dodd 16384dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 164df8bae1dSRodney W. Grimes switch (dst->sa_family) { 165df8bae1dSRodney W. Grimes #ifdef INET 166df8bae1dSRodney W. Grimes case AF_INET: 167322dcb8dSMax Khon if (!arpresolve(ifp, rt, m, dst, edst, rt0)) 168df8bae1dSRodney W. Grimes return (0); /* if not yet resolved */ 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 17743a6c75aSMatthew N. Dodd loop_copy = -1; /* 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: 20182cd038dSYoshinobu Inoue if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, (u_char *)edst)) { 202fef5fd23SBosko Milekic /* Something bad happened */ 20382cd038dSYoshinobu Inoue return(0); 20482cd038dSYoshinobu Inoue } 20582cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 20682cd038dSYoshinobu Inoue break; 20782cd038dSYoshinobu Inoue #endif 208cc6a66f2SJulian Elischer #ifdef IPX 209cc6a66f2SJulian Elischer case AF_IPX: 2104f93599fSBoris Popov if (ef_outputp) { 2112a7e8eceSBoris Popov error = ef_outputp(ifp, &m, dst, &type, &hlen); 2125accfb8cSBoris Popov if (error) 2135accfb8cSBoris Popov goto bad; 2144f93599fSBoris Popov } else 21534bed8b0SDavid Greenman type = htons(ETHERTYPE_IPX); 216cc6a66f2SJulian Elischer bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 217cc6a66f2SJulian Elischer (caddr_t)edst, sizeof (edst)); 218cc6a66f2SJulian Elischer break; 219cc6a66f2SJulian Elischer #endif 220655929bfSJulian Elischer #ifdef NETATALK 221655929bfSJulian Elischer case AF_APPLETALK: 2221d0eab59SJulian Elischer { 223ed7509acSJulian Elischer struct at_ifaddr *aa; 2241d0eab59SJulian Elischer 225ed7509acSJulian Elischer if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) { 2261d0eab59SJulian Elischer goto bad; 2271d0eab59SJulian Elischer } 228ed7509acSJulian Elischer if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) 2291d0eab59SJulian Elischer return (0); 230655929bfSJulian Elischer /* 231ed7509acSJulian Elischer * In the phase 2 case, need to prepend an mbuf for the llc header. 232655929bfSJulian Elischer * Since we must preserve the value of m, which is passed to us by 233655929bfSJulian Elischer * value, we m_copy() the first mbuf, and use it for our llc header. 234655929bfSJulian Elischer */ 235655929bfSJulian Elischer if ( aa->aa_flags & AFA_PHASE2 ) { 236655929bfSJulian Elischer struct llc llc; 237655929bfSJulian Elischer 238797f247bSMatthew N. Dodd M_PREPEND(m, LLC_SNAPFRAMELEN, M_TRYWAIT); 2392166ffe8SRobert Watson if (m == NULL) 2402166ffe8SRobert Watson senderr(ENOBUFS); 241655929bfSJulian Elischer llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 242655929bfSJulian Elischer llc.llc_control = LLC_UI; 243655929bfSJulian Elischer bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 244655929bfSJulian Elischer llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 245797f247bSMatthew N. Dodd bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 24634bed8b0SDavid Greenman type = htons(m->m_pkthdr.len); 247797f247bSMatthew N. Dodd hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN; 248655929bfSJulian Elischer } else { 24934bed8b0SDavid Greenman type = htons(ETHERTYPE_AT); 250655929bfSJulian Elischer } 251655929bfSJulian Elischer break; 252ed7509acSJulian Elischer } 2538cdfefbdSPeter Wemm #endif /* NETATALK */ 254df8bae1dSRodney W. Grimes 255114ae644SMike Smith case pseudo_AF_HDRCMPLT: 256114ae644SMike Smith hdrcmplt = 1; 257114ae644SMike Smith eh = (struct ether_header *)dst->sa_data; 258114ae644SMike Smith (void)memcpy(esrc, eh->ether_shost, sizeof (esrc)); 259114ae644SMike Smith /* FALLTHROUGH */ 260114ae644SMike Smith 261df8bae1dSRodney W. Grimes case AF_UNSPEC: 2629d3f194dSJulian Elischer loop_copy = -1; /* if this is for us, don't do it */ 263df8bae1dSRodney W. Grimes eh = (struct ether_header *)dst->sa_data; 26494a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 265df8bae1dSRodney W. Grimes type = eh->ether_type; 266df8bae1dSRodney W. Grimes break; 267df8bae1dSRodney W. Grimes 268df8bae1dSRodney W. Grimes default: 26929e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 270df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 271df8bae1dSRodney W. Grimes } 272df8bae1dSRodney W. Grimes 273df8bae1dSRodney W. Grimes /* 274df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 275df8bae1dSRodney W. Grimes * allocate another. 276df8bae1dSRodney W. Grimes */ 277797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 2782166ffe8SRobert Watson if (m == NULL) 279df8bae1dSRodney W. Grimes senderr(ENOBUFS); 280df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 28194a5d9b6SDavid Greenman (void)memcpy(&eh->ether_type, &type, 282df8bae1dSRodney W. Grimes sizeof(eh->ether_type)); 28394a5d9b6SDavid Greenman (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); 284114ae644SMike Smith if (hdrcmplt) 285114ae644SMike Smith (void)memcpy(eh->ether_shost, esrc, 286114ae644SMike Smith sizeof(eh->ether_shost)); 287114ae644SMike Smith else 28894a5d9b6SDavid Greenman (void)memcpy(eh->ether_shost, ac->ac_enaddr, 289df8bae1dSRodney W. Grimes sizeof(eh->ether_shost)); 290ed7509acSJulian Elischer 291ed7509acSJulian Elischer /* 292ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 293ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 294ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 295ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 296ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 297ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 298ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 299ed7509acSJulian Elischer */ 3004c8e8c05SJulian Elischer if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 3013cd67511SJesper Skriver int csum_flags = 0; 3023cd67511SJesper Skriver 3033cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_IP) 3043cd67511SJesper Skriver csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 3053cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 3063cd67511SJesper Skriver csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 30706f684b0SMatthew N. Dodd 3089d3f194dSJulian Elischer if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 30906f684b0SMatthew N. Dodd struct mbuf *n; 310ed7509acSJulian Elischer 31179db6ff3SArchie Cobbs if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 3123cd67511SJesper Skriver n->m_pkthdr.csum_flags |= csum_flags; 3133cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3143cd67511SJesper Skriver n->m_pkthdr.csum_data = 0xffff; 31506a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 316c1404dc0SArchie Cobbs } else 317c1404dc0SArchie Cobbs ifp->if_iqdrops++; 31806f684b0SMatthew N. Dodd } else if (bcmp(eh->ether_dhost, eh->ether_shost, 31906f684b0SMatthew N. Dodd ETHER_ADDR_LEN) == 0) { 3203cd67511SJesper Skriver m->m_pkthdr.csum_flags |= csum_flags; 3213cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 3223cd67511SJesper Skriver m->m_pkthdr.csum_data = 0xffff; 32306a429a3SArchie Cobbs (void) if_simloop(ifp, m, dst->sa_family, hlen); 324ed7509acSJulian Elischer return (0); /* XXX */ 325ed7509acSJulian Elischer } 326ed7509acSJulian Elischer } 3272e2de7f2SArchie Cobbs 328e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 329e1e1452dSArchie Cobbs if (ng_ether_output_p != NULL) { 330e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 331e1e1452dSArchie Cobbs bad: if (m != NULL) 332e1e1452dSArchie Cobbs m_freem(m); 333e1e1452dSArchie Cobbs return (error); 334e1e1452dSArchie Cobbs } 335e1e1452dSArchie Cobbs if (m == NULL) 336e1e1452dSArchie Cobbs return (0); 337e1e1452dSArchie Cobbs } 338e1e1452dSArchie Cobbs 339e1e1452dSArchie Cobbs /* Continue with link-layer output */ 340e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 341e1e1452dSArchie Cobbs } 342e1e1452dSArchie Cobbs 343e1e1452dSArchie Cobbs /* 344e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 345e1e1452dSArchie Cobbs * 346e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 347e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 348e1e1452dSArchie Cobbs */ 349e1e1452dSArchie Cobbs int 350c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 351e1e1452dSArchie Cobbs { 352ac9d7e26SMax Laier struct ip_fw *rule = ip_dn_claim_rule(m); 3532b25acc1SLuigi Rizzo 354c1d93b05SSam Leffler if (rule == NULL && BDG_ACTIVE(ifp)) { 355c1d93b05SSam Leffler /* 356c1d93b05SSam Leffler * Beware, the bridge code notices the null rcvif and 357c1d93b05SSam Leffler * uses that identify that it's being called from 358c1d93b05SSam Leffler * ether_output as opposd to ether_input. Yech. 359c1d93b05SSam Leffler */ 360fb5fbe46SLuigi Rizzo m->m_pkthdr.rcvif = NULL; 361c1d93b05SSam Leffler m = bdg_forward_ptr(m, ifp); 3622e2de7f2SArchie Cobbs if (m != NULL) 3632e2de7f2SArchie Cobbs m_freem(m); 3641db59ce6SEivind Eklund return (0); 365fb5fbe46SLuigi Rizzo } 3664b984093SLuigi Rizzo if (IPFW_LOADED && ether_ipfw != 0) { 367c1d93b05SSam Leffler if (ether_ipfw_chk(&m, ifp, &rule, 0) == 0) { 3684b984093SLuigi Rizzo if (m) { 3694b984093SLuigi Rizzo m_freem(m); 370e7909401SDavid Malone return EACCES; /* pkt dropped */ 3714b984093SLuigi Rizzo } else 3724b984093SLuigi Rizzo return 0; /* consumed e.g. in a pipe */ 3734b984093SLuigi Rizzo } 3744b984093SLuigi Rizzo } 3752b25acc1SLuigi Rizzo 376df8bae1dSRodney W. Grimes /* 377df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 378df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 379df8bae1dSRodney W. Grimes */ 380c1d93b05SSam Leffler return (IF_HANDOFF(&ifp->if_snd, m, ifp) ? 0 : ENOBUFS); 381df8bae1dSRodney W. Grimes } 382df8bae1dSRodney W. Grimes 383df8bae1dSRodney W. Grimes /* 3844b984093SLuigi Rizzo * ipfw processing for ethernet packets (in and out). 3854b984093SLuigi Rizzo * The second parameter is NULL from ether_demux, and ifp from 3864b984093SLuigi Rizzo * ether_output_frame. This section of code could be used from 3872f8ebbf4SLuigi Rizzo * bridge.c as well as long as we use some extra info 3884b984093SLuigi Rizzo * to distinguish that case from ether_output_frame(); 3894b984093SLuigi Rizzo */ 3904b984093SLuigi Rizzo int 3914b984093SLuigi Rizzo ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, 392c1d93b05SSam Leffler struct ip_fw **rule, int shared) 3934b984093SLuigi Rizzo { 394c1d93b05SSam Leffler struct ether_header *eh; 395c1d93b05SSam Leffler struct ether_header save_eh; 396c1d93b05SSam Leffler struct mbuf *m; 3974b984093SLuigi Rizzo int i; 3982b25acc1SLuigi Rizzo struct ip_fw_args args; 3994b984093SLuigi Rizzo 40097850a5dSLuigi Rizzo if (*rule != NULL && fw_one_pass) 401015d72e0SLuigi Rizzo return 1; /* dummynet packet, already partially processed */ 4022f8ebbf4SLuigi Rizzo 4034b984093SLuigi Rizzo /* 4042f8ebbf4SLuigi Rizzo * I need some amt of data to be contiguous, and in case others need 4054b984093SLuigi Rizzo * the packet (shared==1) also better be in the first mbuf. 4064b984093SLuigi Rizzo */ 407c1d93b05SSam Leffler m = *m0; 408c1d93b05SSam Leffler i = min( m->m_pkthdr.len, max_protohdr); 409c1d93b05SSam Leffler if ( shared || m->m_len < i) { 410c1d93b05SSam Leffler m = m_pullup(m, i); 411c1d93b05SSam Leffler if (m == NULL) { 412c1d93b05SSam Leffler *m0 = m; 4134b984093SLuigi Rizzo return 0; 4144b984093SLuigi Rizzo } 415c1d93b05SSam Leffler } 416c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 417c1d93b05SSam Leffler save_eh = *eh; /* save copy for restore below */ 418c1d93b05SSam Leffler m_adj(m, ETHER_HDR_LEN); /* strip ethernet header */ 4194b984093SLuigi Rizzo 420c1d93b05SSam Leffler args.m = m; /* the packet we are looking at */ 4212b25acc1SLuigi Rizzo args.oif = dst; /* destination, if any */ 4222b25acc1SLuigi Rizzo args.rule = *rule; /* matching rule to restart */ 4232b25acc1SLuigi Rizzo args.next_hop = NULL; /* we do not support forward yet */ 4242b25acc1SLuigi Rizzo args.eh = &save_eh; /* MAC header for bridged/MAC packets */ 4252b25acc1SLuigi Rizzo i = ip_fw_chk_ptr(&args); 426c1d93b05SSam Leffler m = args.m; 427c1d93b05SSam Leffler if (m != NULL) { 428c1d93b05SSam Leffler /* 429c1d93b05SSam Leffler * Restore Ethernet header, as needed, in case the 430c1d93b05SSam Leffler * mbuf chain was replaced by ipfw. 431c1d93b05SSam Leffler */ 432a163d034SWarner Losh M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 433c1d93b05SSam Leffler if (m == NULL) { 434c1d93b05SSam Leffler *m0 = m; 435c1d93b05SSam Leffler return 0; 436c1d93b05SSam Leffler } 437c1d93b05SSam Leffler if (eh != mtod(m, struct ether_header *)) 438c1d93b05SSam Leffler bcopy(&save_eh, mtod(m, struct ether_header *), 439c1d93b05SSam Leffler ETHER_HDR_LEN); 440c1d93b05SSam Leffler } 441c1d93b05SSam Leffler *m0 = m; 4422b25acc1SLuigi Rizzo *rule = args.rule; 4432b25acc1SLuigi Rizzo 444c1d93b05SSam Leffler if ( (i & IP_FW_PORT_DENY_FLAG) || m == NULL) /* drop */ 4454b984093SLuigi Rizzo return 0; 4464b984093SLuigi Rizzo 4474b984093SLuigi Rizzo if (i == 0) /* a PASS rule. */ 4484b984093SLuigi Rizzo return 1; 4494b984093SLuigi Rizzo 4504b984093SLuigi Rizzo if (DUMMYNET_LOADED && (i & IP_FW_PORT_DYNT_FLAG)) { 4514b984093SLuigi Rizzo /* 4524b984093SLuigi Rizzo * Pass the pkt to dummynet, which consumes it. 4534b984093SLuigi Rizzo * If shared, make a copy and keep the original. 4544b984093SLuigi Rizzo */ 4554b984093SLuigi Rizzo if (shared) { 456a163d034SWarner Losh m = m_copypacket(m, M_DONTWAIT); 4572b25acc1SLuigi Rizzo if (m == NULL) 4584b984093SLuigi Rizzo return 0; 4594b984093SLuigi Rizzo } else { 4602b25acc1SLuigi Rizzo /* 461c1d93b05SSam Leffler * Pass the original to dummynet and 462c1d93b05SSam Leffler * nothing back to the caller 4632b25acc1SLuigi Rizzo */ 464c1d93b05SSam Leffler *m0 = NULL ; 4654b984093SLuigi Rizzo } 4662b25acc1SLuigi Rizzo ip_dn_io_ptr(m, (i & 0xffff), 4672b25acc1SLuigi Rizzo dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args); 4684b984093SLuigi Rizzo return 0; 4694b984093SLuigi Rizzo } 4704b984093SLuigi Rizzo /* 4712f8ebbf4SLuigi Rizzo * XXX at some point add support for divert/forward actions. 4722f8ebbf4SLuigi Rizzo * If none of the above matches, we have to drop the pkt. 4734b984093SLuigi Rizzo */ 4744b984093SLuigi Rizzo return 0; 4754b984093SLuigi Rizzo } 4764b984093SLuigi Rizzo 4774b984093SLuigi Rizzo /* 478c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 479c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 480df8bae1dSRodney W. Grimes */ 481c1d93b05SSam Leffler static void 482c1d93b05SSam Leffler ether_input(struct ifnet *ifp, struct mbuf *m) 483df8bae1dSRodney W. Grimes { 484c1d93b05SSam Leffler struct ether_header *eh; 485c1d93b05SSam Leffler u_short etype; 486df8bae1dSRodney W. Grimes 487c1d93b05SSam Leffler /* 488c1d93b05SSam Leffler * Do consistency checks to verify assumptions 489c1d93b05SSam Leffler * made by code past this point. 490c1d93b05SSam Leffler */ 491c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 492c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 493c1d93b05SSam Leffler ifp->if_ierrors++; 494c939f1aeSLuigi Rizzo m_freem(m); 495c939f1aeSLuigi Rizzo return; 496c939f1aeSLuigi Rizzo } 497797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 498c1d93b05SSam Leffler /* XXX maybe should pullup? */ 499c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 500c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 501c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 502c1d93b05SSam Leffler ifp->if_ierrors++; 503c1d93b05SSam Leffler m_freem(m); 504c1d93b05SSam Leffler return; 5052e2de7f2SArchie Cobbs } 506c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 507c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 508c1d93b05SSam Leffler if (m->m_pkthdr.len > 509c1d93b05SSam Leffler ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 510c1d93b05SSam Leffler if_printf(ifp, "discard oversize frame " 511c1d93b05SSam Leffler "(ether type %x flags %x len %u > max %lu)\n", 512c1d93b05SSam Leffler etype, m->m_flags, m->m_pkthdr.len, 513c1d93b05SSam Leffler ETHER_MAX_FRAME(ifp, etype, 514c1d93b05SSam Leffler m->m_flags & M_HASFCS)); 515c1d93b05SSam Leffler ifp->if_ierrors++; 516c1d93b05SSam Leffler m_freem(m); 517c1d93b05SSam Leffler return; 518c1d93b05SSam Leffler } 519c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 520c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 521c1d93b05SSam Leffler ifp->if_ierrors++; 522c1d93b05SSam Leffler m_freem(m); 523c1d93b05SSam Leffler return; 524c1d93b05SSam Leffler } 525c1d93b05SSam Leffler #ifdef DIAGNOSTIC 526c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 5279bf40edeSBrooks Davis if_printf(ifp, "Warning, frame marked as received on %s\n", 5289bf40edeSBrooks Davis m->m_pkthdr.rcvif->if_xname); 529c1d93b05SSam Leffler } 530c1d93b05SSam Leffler #endif 531c1d93b05SSam Leffler 532533d8562SRobert Watson #ifdef MAC 533533d8562SRobert Watson /* 534533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 535533d8562SRobert Watson * consumers can get to it. 536533d8562SRobert Watson */ 537533d8562SRobert Watson mac_create_mbuf_from_ifnet(ifp, m); 538533d8562SRobert Watson #endif 539533d8562SRobert Watson 540c1d93b05SSam Leffler /* 541c1d93b05SSam Leffler * Give bpf a chance at the packet. 542c1d93b05SSam Leffler */ 543c1d93b05SSam Leffler BPF_MTAP(ifp, m); 5442e2de7f2SArchie Cobbs 545afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) { 546c1d93b05SSam Leffler /* 547c1d93b05SSam Leffler * Interface marked for monitoring; discard packet. 548c1d93b05SSam Leffler */ 549afbe3a0fSPoul-Henning Kamp m_freem(m); 550afbe3a0fSPoul-Henning Kamp return; 551afbe3a0fSPoul-Henning Kamp } 552afbe3a0fSPoul-Henning Kamp 553c1d93b05SSam Leffler /* If the CRC is still on the packet, trim it off. */ 554c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 555c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 556c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 557c1d93b05SSam Leffler } 558c1d93b05SSam Leffler 559c1d93b05SSam Leffler ifp->if_ibytes += m->m_pkthdr.len; 56005463bb5SDavid Greenman 561e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 562e1e1452dSArchie Cobbs if (ng_ether_input_p != NULL) { 563c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 564e1e1452dSArchie Cobbs if (m == NULL) 565e1e1452dSArchie Cobbs return; 566e1e1452dSArchie Cobbs } 567e1e1452dSArchie Cobbs 5682e2de7f2SArchie Cobbs /* Check for bridging mode */ 5697b109fa4SLuigi Rizzo if (BDG_ACTIVE(ifp) ) { 5702e2de7f2SArchie Cobbs struct ifnet *bif; 5712e2de7f2SArchie Cobbs 572c1d93b05SSam Leffler /* 573c1d93b05SSam Leffler * Check with bridging code to see how the packet 574c1d93b05SSam Leffler * should be handled. Possibilities are: 575c1d93b05SSam Leffler * 576c1d93b05SSam Leffler * BDG_BCAST broadcast 577c1d93b05SSam Leffler * BDG_MCAST multicast 578c1d93b05SSam Leffler * BDG_LOCAL for local address, don't forward 579c1d93b05SSam Leffler * BDG_DROP discard 580c1d93b05SSam Leffler * ifp forward only to specified interface(s) 581c1d93b05SSam Leffler * 582c1d93b05SSam Leffler * Non-local destinations are handled by passing the 583c1d93b05SSam Leffler * packet back to the bridge code. 584c1d93b05SSam Leffler */ 585c1d93b05SSam Leffler bif = bridge_in_ptr(ifp, eh); 586c1d93b05SSam Leffler if (bif == BDG_DROP) { /* discard packet */ 5872e2de7f2SArchie Cobbs m_freem(m); 5882e2de7f2SArchie Cobbs return; 5892e2de7f2SArchie Cobbs } 590c1d93b05SSam Leffler if (bif != BDG_LOCAL) { /* non-local, forward */ 591c1d93b05SSam Leffler m = bdg_forward_ptr(m, bif); 592ddacb30fSBosko Milekic /* 593c1d93b05SSam Leffler * The bridge may consume the packet if it's not 594c1d93b05SSam Leffler * supposed to be passed up or if a problem occurred 595c1d93b05SSam Leffler * while doing its job. This is reflected by it 596c1d93b05SSam Leffler * returning a NULL mbuf pointer. 597ddacb30fSBosko Milekic */ 598507b4b54SLuigi Rizzo if (m == NULL) { 599507b4b54SLuigi Rizzo if (bif == BDG_BCAST || bif == BDG_MCAST) 600c1d93b05SSam Leffler if_printf(ifp, 601c1d93b05SSam Leffler "bridge dropped %s packet\n", 602c1d93b05SSam Leffler bif == BDG_BCAST ? "broadcast" : 603c1d93b05SSam Leffler "multicast"); 604ddacb30fSBosko Milekic return; 605ddacb30fSBosko Milekic } 606c1d93b05SSam Leffler /* 607c1d93b05SSam Leffler * But in some cases the bridge may return the 608c1d93b05SSam Leffler * packet for us to free; sigh. 609c1d93b05SSam Leffler */ 610c1d93b05SSam Leffler if (bif != BDG_BCAST && bif != BDG_MCAST) { 6112e2de7f2SArchie Cobbs m_freem(m); 6122e2de7f2SArchie Cobbs return; 6132e2de7f2SArchie Cobbs } 614c1d93b05SSam Leffler } 615c1d93b05SSam Leffler } 6162e2de7f2SArchie Cobbs 617c1d93b05SSam Leffler ether_demux(ifp, m); 618a6ddbff0SPoul-Henning Kamp /* First chunk of an mbuf contains good entropy */ 61910b1fde0SMark Murray if (harvest.ethernet) 62010b1fde0SMark Murray random_harvest(m, 16, 3, 0, RANDOM_NET); 621e1e1452dSArchie Cobbs } 622e1e1452dSArchie Cobbs 623e1e1452dSArchie Cobbs /* 624e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 625e1e1452dSArchie Cobbs */ 626e1e1452dSArchie Cobbs void 627c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 628e1e1452dSArchie Cobbs { 629c1d93b05SSam Leffler struct ether_header *eh; 6301cafed39SJonathan Lemon int isr; 631e1e1452dSArchie Cobbs u_short ether_type; 632e1e1452dSArchie Cobbs #if defined(NETATALK) 633098a8c3bSMatthew N. Dodd struct llc *l; 634e1e1452dSArchie Cobbs #endif 635ac9d7e26SMax Laier struct ip_fw *rule = ip_dn_claim_rule(m); 63636e8826fSMax Laier 637c1d93b05SSam Leffler KASSERT(ifp != NULL, ("ether_demux: NULL interface pointer")); 638c1d93b05SSam Leffler 639c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 640c1d93b05SSam Leffler 6412b25acc1SLuigi Rizzo if (rule) /* packet was already bridged */ 6422b25acc1SLuigi Rizzo goto post_stats; 6434b984093SLuigi Rizzo 644c6943100SPoul-Henning Kamp if (!(BDG_ACTIVE(ifp))) { 645c6943100SPoul-Henning Kamp /* 646c6943100SPoul-Henning Kamp * Discard packet if upper layers shouldn't see it because it 647c6943100SPoul-Henning Kamp * was unicast to a different Ethernet address. If the driver 648c6943100SPoul-Henning Kamp * is working properly, then this situation can only happen 649c6943100SPoul-Henning Kamp * when the interface is in promiscuous mode. 650c6943100SPoul-Henning Kamp */ 651cb24f323SArchie Cobbs if ((ifp->if_flags & IFF_PROMISC) != 0 652cb24f323SArchie Cobbs && (eh->ether_dhost[0] & 1) == 0 653cb24f323SArchie Cobbs && bcmp(eh->ether_dhost, 654ffb079beSMaxim Sobolev IFP2AC(ifp)->ac_enaddr, ETHER_ADDR_LEN) != 0 65525faf49dSMaxim Sobolev && (ifp->if_flags & IFF_PPROMISC) == 0) { 656cb24f323SArchie Cobbs m_freem(m); 657cb24f323SArchie Cobbs return; 658cb24f323SArchie Cobbs } 659c6943100SPoul-Henning Kamp } 660cb24f323SArchie Cobbs 6612e2de7f2SArchie Cobbs /* Discard packet if interface is not up */ 662df8bae1dSRodney W. Grimes if ((ifp->if_flags & IFF_UP) == 0) { 663df8bae1dSRodney W. Grimes m_freem(m); 664df8bae1dSRodney W. Grimes return; 665df8bae1dSRodney W. Grimes } 666588523faSSam Leffler if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 66764760eb0SWarner Losh if (bcmp(etherbroadcastaddr, eh->ether_dhost, 668df8bae1dSRodney W. Grimes sizeof(etherbroadcastaddr)) == 0) 669df8bae1dSRodney W. Grimes m->m_flags |= M_BCAST; 6702cc2df49SGarrett Wollman else 671df8bae1dSRodney W. Grimes m->m_flags |= M_MCAST; 6722cc2df49SGarrett Wollman } 673df8bae1dSRodney W. Grimes if (m->m_flags & (M_BCAST|M_MCAST)) 674df8bae1dSRodney W. Grimes ifp->if_imcasts++; 675df8bae1dSRodney W. Grimes 6764b984093SLuigi Rizzo post_stats: 6774b984093SLuigi Rizzo if (IPFW_LOADED && ether_ipfw != 0) { 678c1d93b05SSam Leffler if (ether_ipfw_chk(&m, NULL, &rule, 0) == 0) { 6794b984093SLuigi Rizzo if (m) 6804b984093SLuigi Rizzo m_freem(m); 6814b984093SLuigi Rizzo return; 6824b984093SLuigi Rizzo } 6834b984093SLuigi Rizzo } 6844b984093SLuigi Rizzo 685c1d93b05SSam Leffler /* 686c1d93b05SSam Leffler * If VLANs are configured on the interface, check to 687c1d93b05SSam Leffler * see if the device performed the decapsulation and 688c1d93b05SSam Leffler * provided us with the tag. 689c1d93b05SSam Leffler */ 690c1d93b05SSam Leffler if (ifp->if_nvlans && 691c1d93b05SSam Leffler m_tag_locate(m, MTAG_VLAN, MTAG_VLAN_TAG, NULL) != NULL) { 692c1d93b05SSam Leffler /* 693c1d93b05SSam Leffler * vlan_input() will either recursively call ether_input() 694c1d93b05SSam Leffler * or drop the packet. 695c1d93b05SSam Leffler */ 696c1d93b05SSam Leffler KASSERT(vlan_input_p != NULL,("ether_input: VLAN not loaded!")); 697c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 698c1d93b05SSam Leffler return; 699c1d93b05SSam Leffler } 700c1d93b05SSam Leffler 701307d80beSDavid Greenman ether_type = ntohs(eh->ether_type); 702307d80beSDavid Greenman 703c1d93b05SSam Leffler /* 704c1d93b05SSam Leffler * Handle protocols that expect to have the Ethernet header 705c1d93b05SSam Leffler * (and possibly FCS) intact. 706c1d93b05SSam Leffler */ 707c1d93b05SSam Leffler switch (ether_type) { 708c1d93b05SSam Leffler case ETHERTYPE_VLAN: 709c1d93b05SSam Leffler if (ifp->if_nvlans != 0) { 710c1d93b05SSam Leffler KASSERT(vlan_input_p,("ether_input: VLAN not loaded!")); 711c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 712c1d93b05SSam Leffler } else { 713c1d93b05SSam Leffler ifp->if_noproto++; 714c1d93b05SSam Leffler m_freem(m); 715c1d93b05SSam Leffler } 716c1d93b05SSam Leffler return; 717c1d93b05SSam Leffler } 718c1d93b05SSam Leffler 719c1d93b05SSam Leffler /* Strip off Ethernet header. */ 720797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 721c1d93b05SSam Leffler 722c1d93b05SSam Leffler /* If the CRC is still on the packet, trim it off. */ 723c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 724c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 725c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 726c1d93b05SSam Leffler } 727c1d93b05SSam Leffler 728307d80beSDavid Greenman switch (ether_type) { 729df8bae1dSRodney W. Grimes #ifdef INET 730df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 7319188b4a1SAndre Oppermann if (ip_fastforward(m)) 7321f91d8c5SDavid Greenman return; 7331cafed39SJonathan Lemon isr = NETISR_IP; 734df8bae1dSRodney W. Grimes break; 735df8bae1dSRodney W. Grimes 736df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 73708aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 73808aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 73908aadfbbSJonathan Lemon m_freem(m); 74008aadfbbSJonathan Lemon return; 74108aadfbbSJonathan Lemon } 7421cafed39SJonathan Lemon isr = NETISR_ARP; 743df8bae1dSRodney W. Grimes break; 744df8bae1dSRodney W. Grimes #endif 745cc6a66f2SJulian Elischer #ifdef IPX 746cc6a66f2SJulian Elischer case ETHERTYPE_IPX: 7474f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 7484f93599fSBoris Popov return; 7491cafed39SJonathan Lemon isr = NETISR_IPX; 750cc6a66f2SJulian Elischer break; 751cc6a66f2SJulian Elischer #endif 75282cd038dSYoshinobu Inoue #ifdef INET6 75382cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 7541cafed39SJonathan Lemon isr = NETISR_IPV6; 75582cd038dSYoshinobu Inoue break; 75682cd038dSYoshinobu Inoue #endif 757655929bfSJulian Elischer #ifdef NETATALK 758655929bfSJulian Elischer case ETHERTYPE_AT: 7591cafed39SJonathan Lemon isr = NETISR_ATALK1; 760655929bfSJulian Elischer break; 761655929bfSJulian Elischer case ETHERTYPE_AARP: 7621cafed39SJonathan Lemon isr = NETISR_AARP; 7631cafed39SJonathan Lemon break; 7648cdfefbdSPeter Wemm #endif /* NETATALK */ 765df8bae1dSRodney W. Grimes default: 7664f93599fSBoris Popov #ifdef IPX 7674f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 7684f93599fSBoris Popov return; 7694f93599fSBoris Popov #endif /* IPX */ 770242c5536SPeter Wemm #if defined(NETATALK) 771307d80beSDavid Greenman if (ether_type > ETHERMTU) 772c1d93b05SSam Leffler goto discard; 773df8bae1dSRodney W. Grimes l = mtod(m, struct llc *); 7741cafed39SJonathan Lemon if (l->llc_dsap == LLC_SNAP_LSAP && 7751cafed39SJonathan Lemon l->llc_ssap == LLC_SNAP_LSAP && 7761cafed39SJonathan Lemon l->llc_control == LLC_UI) { 777655929bfSJulian Elischer if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code, 778655929bfSJulian Elischer sizeof(at_org_code)) == 0 && 779655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 780797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 7811cafed39SJonathan Lemon isr = NETISR_ATALK2; 782655929bfSJulian Elischer break; 783655929bfSJulian Elischer } 784655929bfSJulian Elischer if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 785655929bfSJulian Elischer sizeof(aarp_org_code)) == 0 && 786655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 787797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 7881cafed39SJonathan Lemon isr = NETISR_AARP; 789655929bfSJulian Elischer break; 790df8bae1dSRodney W. Grimes } 7911cafed39SJonathan Lemon } 792242c5536SPeter Wemm #endif /* NETATALK */ 7931cafed39SJonathan Lemon goto discard; 794df8bae1dSRodney W. Grimes } 7951cafed39SJonathan Lemon netisr_dispatch(isr, m); 796c1d93b05SSam Leffler return; 7971cafed39SJonathan Lemon 798c1d93b05SSam Leffler discard: 799c1d93b05SSam Leffler /* 800c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 801c1d93b05SSam Leffler * hand the packet to it for last chance processing; 802c1d93b05SSam Leffler * otherwise dispose of it. 803c1d93b05SSam Leffler */ 804c1d93b05SSam Leffler if (ng_ether_input_orphan_p != NULL) { 805c1d93b05SSam Leffler /* 806c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 807c1d93b05SSam Leffler * consistent view of inbound packets. 808c1d93b05SSam Leffler */ 809797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 810c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 811c1d93b05SSam Leffler return; 812c1d93b05SSam Leffler } 813c1d93b05SSam Leffler m_freem(m); 814c1d93b05SSam Leffler } 815c1d93b05SSam Leffler 816c1d93b05SSam Leffler /* 817c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 818c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 819c1d93b05SSam Leffler * 820c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 821c1d93b05SSam Leffler * 822c1d93b05SSam Leffler * since there's no static buffer involved. 823c1d93b05SSam Leffler */ 824c1d93b05SSam Leffler char * 825c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 826c1d93b05SSam Leffler { 827c1d93b05SSam Leffler static char etherbuf[18]; 828c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 829c1d93b05SSam Leffler return (etherbuf); 830df8bae1dSRodney W. Grimes } 831df8bae1dSRodney W. Grimes 832df8bae1dSRodney W. Grimes /* 833df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 834df8bae1dSRodney W. Grimes */ 835df8bae1dSRodney W. Grimes void 836c1d93b05SSam Leffler ether_ifattach(struct ifnet *ifp, const u_int8_t *llc) 837df8bae1dSRodney W. Grimes { 838098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 839098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 840df8bae1dSRodney W. Grimes 841df8bae1dSRodney W. Grimes ifp->if_type = IFT_ETHER; 842c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 843c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 844cfeff1b6SJonathan Lemon if_attach(ifp); 845df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 846c1d93b05SSam Leffler ifp->if_output = ether_output; 847c1d93b05SSam Leffler ifp->if_input = ether_input; 8481158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 849a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 850c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 851322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 852c1d93b05SSam Leffler 853f9132cebSJonathan Lemon ifa = ifaddr_byindex(ifp->if_index); 8546e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 85559562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 856df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 857df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 858c1d93b05SSam Leffler bcopy(llc, LLADDR(sdl), ifp->if_addrlen); 859c1d93b05SSam Leffler /* 860c1d93b05SSam Leffler * XXX: This doesn't belong here; we do it until 861c1d93b05SSam Leffler * XXX: all drivers are cleaned up 862c1d93b05SSam Leffler */ 863c1d93b05SSam Leffler if (llc != IFP2AC(ifp)->ac_enaddr) 864c1d93b05SSam Leffler bcopy(llc, IFP2AC(ifp)->ac_enaddr, ifp->if_addrlen); 865c1d93b05SSam Leffler 866797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 867e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 868e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 8697b109fa4SLuigi Rizzo if (BDG_LOADED) 870db69a05dSPaul Saab bdgtakeifaces_ptr(); 871e1e1452dSArchie Cobbs } 872e1e1452dSArchie Cobbs 87321b8ebd9SArchie Cobbs /* 87421b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 87521b8ebd9SArchie Cobbs */ 87621b8ebd9SArchie Cobbs void 877c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 87821b8ebd9SArchie Cobbs { 87921b8ebd9SArchie Cobbs if (ng_ether_detach_p != NULL) 88021b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 88121b8ebd9SArchie Cobbs bpfdetach(ifp); 88221b8ebd9SArchie Cobbs if_detach(ifp); 8837b109fa4SLuigi Rizzo if (BDG_LOADED) 884db69a05dSPaul Saab bdgtakeifaces_ptr(); 88521b8ebd9SArchie Cobbs } 88621b8ebd9SArchie Cobbs 887ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 888602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 8894b984093SLuigi Rizzo SYSCTL_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW, 8904b984093SLuigi Rizzo ðer_ipfw,0,"Pass ether pkts through firewall"); 89130106f6aSPoul-Henning Kamp 892fb583156SDavid Greenman int 89372fd1b6aSDag-Erling Smørgrav ether_ioctl(struct ifnet *ifp, int command, caddr_t data) 89430106f6aSPoul-Henning Kamp { 89530106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 89630106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 897fb583156SDavid Greenman int error = 0; 89830106f6aSPoul-Henning Kamp 89930106f6aSPoul-Henning Kamp switch (command) { 90030106f6aSPoul-Henning Kamp case SIOCSIFADDR: 90130106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 90230106f6aSPoul-Henning Kamp 90330106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 90430106f6aSPoul-Henning Kamp #ifdef INET 90530106f6aSPoul-Henning Kamp case AF_INET: 90630106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 907322dcb8dSMax Khon arp_ifinit(ifp, ifa); 90830106f6aSPoul-Henning Kamp break; 90930106f6aSPoul-Henning Kamp #endif 91030106f6aSPoul-Henning Kamp #ifdef IPX 91130106f6aSPoul-Henning Kamp /* 91230106f6aSPoul-Henning Kamp * XXX - This code is probably wrong 91330106f6aSPoul-Henning Kamp */ 91430106f6aSPoul-Henning Kamp case AF_IPX: 91530106f6aSPoul-Henning Kamp { 916098a8c3bSMatthew N. Dodd struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 9174c8e8c05SJulian Elischer struct arpcom *ac = IFP2AC(ifp); 91830106f6aSPoul-Henning Kamp 91930106f6aSPoul-Henning Kamp if (ipx_nullhost(*ina)) 92030106f6aSPoul-Henning Kamp ina->x_host = 92186101139SPoul-Henning Kamp *(union ipx_host *) 92286101139SPoul-Henning Kamp ac->ac_enaddr; 92330106f6aSPoul-Henning Kamp else { 92430106f6aSPoul-Henning Kamp bcopy((caddr_t) ina->x_host.c_host, 92586101139SPoul-Henning Kamp (caddr_t) ac->ac_enaddr, 92686101139SPoul-Henning Kamp sizeof(ac->ac_enaddr)); 92730106f6aSPoul-Henning Kamp } 92830106f6aSPoul-Henning Kamp 92930106f6aSPoul-Henning Kamp /* 93030106f6aSPoul-Henning Kamp * Set new address 93130106f6aSPoul-Henning Kamp */ 93230106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 93330106f6aSPoul-Henning Kamp break; 93430106f6aSPoul-Henning Kamp } 93530106f6aSPoul-Henning Kamp #endif 93630106f6aSPoul-Henning Kamp default: 93730106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 93830106f6aSPoul-Henning Kamp break; 93930106f6aSPoul-Henning Kamp } 94030106f6aSPoul-Henning Kamp break; 94130106f6aSPoul-Henning Kamp 94230106f6aSPoul-Henning Kamp case SIOCGIFADDR: 94330106f6aSPoul-Henning Kamp { 94430106f6aSPoul-Henning Kamp struct sockaddr *sa; 94530106f6aSPoul-Henning Kamp 94630106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 9474c8e8c05SJulian Elischer bcopy(IFP2AC(ifp)->ac_enaddr, 94830106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 94930106f6aSPoul-Henning Kamp } 95030106f6aSPoul-Henning Kamp break; 951fb583156SDavid Greenman 952fb583156SDavid Greenman case SIOCSIFMTU: 953fb583156SDavid Greenman /* 954fb583156SDavid Greenman * Set the interface MTU. 955fb583156SDavid Greenman */ 956fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 957fb583156SDavid Greenman error = EINVAL; 958fb583156SDavid Greenman } else { 959fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 96030106f6aSPoul-Henning Kamp } 961fb583156SDavid Greenman break; 962c1d93b05SSam Leffler default: 963c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 964c1d93b05SSam Leffler break; 965fb583156SDavid Greenman } 966fb583156SDavid Greenman return (error); 96730106f6aSPoul-Henning Kamp } 9681158dfb7SGarrett Wollman 96937c84183SPoul-Henning Kamp static int 97072fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 97172fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 9721158dfb7SGarrett Wollman { 9731158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 9741158dfb7SGarrett Wollman struct sockaddr_in *sin; 97582cd038dSYoshinobu Inoue #ifdef INET6 97682cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 97782cd038dSYoshinobu Inoue #endif 9781158dfb7SGarrett Wollman u_char *e_addr; 9791158dfb7SGarrett Wollman 9801158dfb7SGarrett Wollman switch(sa->sa_family) { 9811158dfb7SGarrett Wollman case AF_LINK: 9827f33a738SJulian Elischer /* 9837f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 9847f33a738SJulian Elischer */ 9851158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 9861158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 9871158dfb7SGarrett Wollman if ((e_addr[0] & 1) != 1) 9881158dfb7SGarrett Wollman return EADDRNOTAVAIL; 9891158dfb7SGarrett Wollman *llsa = 0; 9901158dfb7SGarrett Wollman return 0; 9911158dfb7SGarrett Wollman 9921158dfb7SGarrett Wollman #ifdef INET 9931158dfb7SGarrett Wollman case AF_INET: 9941158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 9951158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 9961158dfb7SGarrett Wollman return EADDRNOTAVAIL; 9971158dfb7SGarrett Wollman MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 998a163d034SWarner Losh M_WAITOK|M_ZERO); 9991158dfb7SGarrett Wollman sdl->sdl_len = sizeof *sdl; 10001158dfb7SGarrett Wollman sdl->sdl_family = AF_LINK; 10011158dfb7SGarrett Wollman sdl->sdl_index = ifp->if_index; 10021158dfb7SGarrett Wollman sdl->sdl_type = IFT_ETHER; 10031158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 10041158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 10051158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 10061158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 10071158dfb7SGarrett Wollman return 0; 10081158dfb7SGarrett Wollman #endif 100982cd038dSYoshinobu Inoue #ifdef INET6 101082cd038dSYoshinobu Inoue case AF_INET6: 101182cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1012595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1013595b8a1cSJun-ichiro itojun Hagino /* 1014595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1015595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1016595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1017595b8a1cSJun-ichiro itojun Hagino */ 1018595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1019595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1020595b8a1cSJun-ichiro itojun Hagino return 0; 1021595b8a1cSJun-ichiro itojun Hagino } 102282cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 102382cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 102482cd038dSYoshinobu Inoue MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 1025a163d034SWarner Losh M_WAITOK|M_ZERO); 102682cd038dSYoshinobu Inoue sdl->sdl_len = sizeof *sdl; 102782cd038dSYoshinobu Inoue sdl->sdl_family = AF_LINK; 102882cd038dSYoshinobu Inoue sdl->sdl_index = ifp->if_index; 102982cd038dSYoshinobu Inoue sdl->sdl_type = IFT_ETHER; 103082cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 103182cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 103282cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 103382cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 103482cd038dSYoshinobu Inoue return 0; 103582cd038dSYoshinobu Inoue #endif 10361158dfb7SGarrett Wollman 10371158dfb7SGarrett Wollman default: 10381158dfb7SGarrett Wollman /* 10391158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 10401158dfb7SGarrett Wollman * that counts... 10411158dfb7SGarrett Wollman */ 10421158dfb7SGarrett Wollman return EAFNOSUPPORT; 10431158dfb7SGarrett Wollman } 10441158dfb7SGarrett Wollman } 104540811c14SMatthew N. Dodd 104640811c14SMatthew N. Dodd static moduledata_t ether_mod = { 104740811c14SMatthew N. Dodd "ether", 104840811c14SMatthew N. Dodd NULL, 104940811c14SMatthew N. Dodd 0 105040811c14SMatthew N. Dodd }; 105140811c14SMatthew N. Dodd 105240811c14SMatthew N. Dodd DECLARE_MODULE(ether, ether_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 105340811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1054