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 105c1d93b05SSam Leffler 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 114868d8b62SMatthew N. Dodd static 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 136d25f3712SBrian Feldman ether_output(ifp, m, dst, rt0) 137098a8c3bSMatthew N. Dodd struct ifnet *ifp; 138d25f3712SBrian Feldman struct mbuf *m; 139df8bae1dSRodney W. Grimes struct sockaddr *dst; 140df8bae1dSRodney W. Grimes struct rtentry *rt0; 141df8bae1dSRodney W. Grimes { 142df8bae1dSRodney W. Grimes short type; 143e1e1452dSArchie Cobbs int error = 0, hdrcmplt = 0; 144114ae644SMike Smith u_char esrc[6], edst[6]; 145098a8c3bSMatthew N. Dodd struct rtentry *rt; 146098a8c3bSMatthew N. Dodd struct ether_header *eh; 1479961e27dSLuigi Rizzo int loop_copy = 0; 14884dd0fd0SJulian Elischer int hlen; /* link layer header lenght */ 1494c8e8c05SJulian Elischer struct arpcom *ac = IFP2AC(ifp); 150df8bae1dSRodney W. Grimes 15143b29369SRobert Watson #ifdef MAC 15243b29369SRobert Watson error = mac_check_ifnet_transmit(ifp, m); 15343b29369SRobert Watson if (error) 15443b29369SRobert Watson senderr(error); 15543b29369SRobert Watson #endif 15643b29369SRobert Watson 157afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) 158afbe3a0fSPoul-Henning Kamp senderr(ENETDOWN); 159df8bae1dSRodney W. Grimes if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 160df8bae1dSRodney W. Grimes senderr(ENETDOWN); 1617f760c48SMatthew N. Dodd 1627f760c48SMatthew N. Dodd error = rt_check(&rt, &rt0, dst); 1637f760c48SMatthew N. Dodd if (error) 1647f760c48SMatthew N. Dodd goto bad; 1657f760c48SMatthew N. Dodd 16684dd0fd0SJulian Elischer hlen = ETHER_HDR_LEN; 167df8bae1dSRodney W. Grimes switch (dst->sa_family) { 168df8bae1dSRodney W. Grimes #ifdef INET 169df8bae1dSRodney W. Grimes case AF_INET: 170322dcb8dSMax Khon if (!arpresolve(ifp, rt, m, dst, edst, rt0)) 171df8bae1dSRodney W. Grimes return (0); /* if not yet resolved */ 17234bed8b0SDavid Greenman type = htons(ETHERTYPE_IP); 173df8bae1dSRodney W. Grimes break; 174df8bae1dSRodney W. Grimes #endif 17582cd038dSYoshinobu Inoue #ifdef INET6 17682cd038dSYoshinobu Inoue case AF_INET6: 17782cd038dSYoshinobu Inoue if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, (u_char *)edst)) { 178fef5fd23SBosko Milekic /* Something bad happened */ 17982cd038dSYoshinobu Inoue return(0); 18082cd038dSYoshinobu Inoue } 18182cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 18282cd038dSYoshinobu Inoue break; 18382cd038dSYoshinobu Inoue #endif 184cc6a66f2SJulian Elischer #ifdef IPX 185cc6a66f2SJulian Elischer case AF_IPX: 1864f93599fSBoris Popov if (ef_outputp) { 1872a7e8eceSBoris Popov error = ef_outputp(ifp, &m, dst, &type, &hlen); 1885accfb8cSBoris Popov if (error) 1895accfb8cSBoris Popov goto bad; 1904f93599fSBoris Popov } else 19134bed8b0SDavid Greenman type = htons(ETHERTYPE_IPX); 192cc6a66f2SJulian Elischer bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 193cc6a66f2SJulian Elischer (caddr_t)edst, sizeof (edst)); 194cc6a66f2SJulian Elischer break; 195cc6a66f2SJulian Elischer #endif 196655929bfSJulian Elischer #ifdef NETATALK 197655929bfSJulian Elischer case AF_APPLETALK: 1981d0eab59SJulian Elischer { 199ed7509acSJulian Elischer struct at_ifaddr *aa; 2001d0eab59SJulian Elischer 201ed7509acSJulian Elischer if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) { 2021d0eab59SJulian Elischer goto bad; 2031d0eab59SJulian Elischer } 204ed7509acSJulian Elischer if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) 2051d0eab59SJulian Elischer return (0); 206655929bfSJulian Elischer /* 207ed7509acSJulian Elischer * In the phase 2 case, need to prepend an mbuf for the llc header. 208655929bfSJulian Elischer * Since we must preserve the value of m, which is passed to us by 209655929bfSJulian Elischer * value, we m_copy() the first mbuf, and use it for our llc header. 210655929bfSJulian Elischer */ 211655929bfSJulian Elischer if ( aa->aa_flags & AFA_PHASE2 ) { 212655929bfSJulian Elischer struct llc llc; 213655929bfSJulian Elischer 214797f247bSMatthew N. Dodd M_PREPEND(m, LLC_SNAPFRAMELEN, M_TRYWAIT); 215655929bfSJulian Elischer llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 216655929bfSJulian Elischer llc.llc_control = LLC_UI; 217655929bfSJulian Elischer bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 218655929bfSJulian Elischer llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 219797f247bSMatthew N. Dodd bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 22034bed8b0SDavid Greenman type = htons(m->m_pkthdr.len); 221797f247bSMatthew N. Dodd hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN; 222655929bfSJulian Elischer } else { 22334bed8b0SDavid Greenman type = htons(ETHERTYPE_AT); 224655929bfSJulian Elischer } 225655929bfSJulian Elischer break; 226ed7509acSJulian Elischer } 2278cdfefbdSPeter Wemm #endif /* NETATALK */ 228df8bae1dSRodney W. Grimes 229114ae644SMike Smith case pseudo_AF_HDRCMPLT: 230114ae644SMike Smith hdrcmplt = 1; 231114ae644SMike Smith eh = (struct ether_header *)dst->sa_data; 232114ae644SMike Smith (void)memcpy(esrc, eh->ether_shost, sizeof (esrc)); 233114ae644SMike Smith /* FALLTHROUGH */ 234114ae644SMike Smith 235df8bae1dSRodney W. Grimes case AF_UNSPEC: 2369d3f194dSJulian Elischer loop_copy = -1; /* if this is for us, don't do it */ 237df8bae1dSRodney W. Grimes eh = (struct ether_header *)dst->sa_data; 23894a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 239df8bae1dSRodney W. Grimes type = eh->ether_type; 240df8bae1dSRodney W. Grimes break; 241df8bae1dSRodney W. Grimes 242df8bae1dSRodney W. Grimes default: 24329e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 244df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 245df8bae1dSRodney W. Grimes } 246df8bae1dSRodney W. Grimes 247df8bae1dSRodney W. Grimes /* 248df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 249df8bae1dSRodney W. Grimes * allocate another. 250df8bae1dSRodney W. Grimes */ 251797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 252df8bae1dSRodney W. Grimes if (m == 0) 253df8bae1dSRodney W. Grimes senderr(ENOBUFS); 254df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 25594a5d9b6SDavid Greenman (void)memcpy(&eh->ether_type, &type, 256df8bae1dSRodney W. Grimes sizeof(eh->ether_type)); 25794a5d9b6SDavid Greenman (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); 258114ae644SMike Smith if (hdrcmplt) 259114ae644SMike Smith (void)memcpy(eh->ether_shost, esrc, 260114ae644SMike Smith sizeof(eh->ether_shost)); 261114ae644SMike Smith else 26294a5d9b6SDavid Greenman (void)memcpy(eh->ether_shost, ac->ac_enaddr, 263df8bae1dSRodney W. Grimes sizeof(eh->ether_shost)); 264ed7509acSJulian Elischer 265ed7509acSJulian Elischer /* 266ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 267ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 268ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 269ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 270ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 271ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 272ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 273ed7509acSJulian Elischer */ 2744c8e8c05SJulian Elischer if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 2753cd67511SJesper Skriver int csum_flags = 0; 2763cd67511SJesper Skriver 2773cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_IP) 2783cd67511SJesper Skriver csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 2793cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 2803cd67511SJesper Skriver csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 28106f684b0SMatthew N. Dodd 2829d3f194dSJulian Elischer if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 28306f684b0SMatthew N. Dodd struct mbuf *n; 28406f684b0SMatthew N. Dodd n = m_copy(m, 0, (int)M_COPYALL); 285ed7509acSJulian Elischer 2863cd67511SJesper Skriver n->m_pkthdr.csum_flags |= csum_flags; 2873cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 2883cd67511SJesper Skriver n->m_pkthdr.csum_data = 0xffff; 2893cd67511SJesper Skriver 29006a429a3SArchie Cobbs (void) if_simloop(ifp, n, dst->sa_family, hlen); 29106f684b0SMatthew N. Dodd } else if (bcmp(eh->ether_dhost, eh->ether_shost, 29206f684b0SMatthew N. Dodd ETHER_ADDR_LEN) == 0) { 2933cd67511SJesper Skriver m->m_pkthdr.csum_flags |= csum_flags; 2943cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 2953cd67511SJesper Skriver m->m_pkthdr.csum_data = 0xffff; 29606a429a3SArchie Cobbs (void) if_simloop(ifp, m, dst->sa_family, hlen); 297ed7509acSJulian Elischer return (0); /* XXX */ 298ed7509acSJulian Elischer } 299ed7509acSJulian Elischer } 3002e2de7f2SArchie Cobbs 301e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 302e1e1452dSArchie Cobbs if (ng_ether_output_p != NULL) { 303e1e1452dSArchie Cobbs if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 304e1e1452dSArchie Cobbs bad: if (m != NULL) 305e1e1452dSArchie Cobbs m_freem(m); 306e1e1452dSArchie Cobbs return (error); 307e1e1452dSArchie Cobbs } 308e1e1452dSArchie Cobbs if (m == NULL) 309e1e1452dSArchie Cobbs return (0); 310e1e1452dSArchie Cobbs } 311e1e1452dSArchie Cobbs 312e1e1452dSArchie Cobbs /* Continue with link-layer output */ 313e1e1452dSArchie Cobbs return ether_output_frame(ifp, m); 314e1e1452dSArchie Cobbs } 315e1e1452dSArchie Cobbs 316e1e1452dSArchie Cobbs /* 317e1e1452dSArchie Cobbs * Ethernet link layer output routine to send a raw frame to the device. 318e1e1452dSArchie Cobbs * 319e1e1452dSArchie Cobbs * This assumes that the 14 byte Ethernet header is present and contiguous 320e1e1452dSArchie Cobbs * in the first mbuf (if BRIDGE'ing). 321e1e1452dSArchie Cobbs */ 322e1e1452dSArchie Cobbs int 323c1d93b05SSam Leffler ether_output_frame(struct ifnet *ifp, struct mbuf *m) 324e1e1452dSArchie Cobbs { 3254b984093SLuigi Rizzo struct ip_fw *rule = NULL; 3262b25acc1SLuigi Rizzo 3272b25acc1SLuigi Rizzo /* Extract info from dummynet tag, ignore others */ 3282b25acc1SLuigi Rizzo for (; m->m_type == MT_TAG; m = m->m_next) 3292b25acc1SLuigi Rizzo if (m->m_flags == PACKET_TAG_DUMMYNET) 3302b25acc1SLuigi Rizzo rule = ((struct dn_pkt *)m)->rule; 3312b25acc1SLuigi Rizzo 332c1d93b05SSam Leffler if (rule == NULL && BDG_ACTIVE(ifp)) { 333c1d93b05SSam Leffler /* 334c1d93b05SSam Leffler * Beware, the bridge code notices the null rcvif and 335c1d93b05SSam Leffler * uses that identify that it's being called from 336c1d93b05SSam Leffler * ether_output as opposd to ether_input. Yech. 337c1d93b05SSam Leffler */ 338fb5fbe46SLuigi Rizzo m->m_pkthdr.rcvif = NULL; 339c1d93b05SSam Leffler m = bdg_forward_ptr(m, ifp); 3402e2de7f2SArchie Cobbs if (m != NULL) 3412e2de7f2SArchie Cobbs m_freem(m); 3421db59ce6SEivind Eklund return (0); 343fb5fbe46SLuigi Rizzo } 3444b984093SLuigi Rizzo if (IPFW_LOADED && ether_ipfw != 0) { 345c1d93b05SSam Leffler if (ether_ipfw_chk(&m, ifp, &rule, 0) == 0) { 3464b984093SLuigi Rizzo if (m) { 3474b984093SLuigi Rizzo m_freem(m); 3484b984093SLuigi Rizzo return ENOBUFS; /* pkt dropped */ 3494b984093SLuigi Rizzo } else 3504b984093SLuigi Rizzo return 0; /* consumed e.g. in a pipe */ 3514b984093SLuigi Rizzo } 3524b984093SLuigi Rizzo } 3532b25acc1SLuigi Rizzo 354df8bae1dSRodney W. Grimes /* 355df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 356df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 357df8bae1dSRodney W. Grimes */ 358c1d93b05SSam Leffler return (IF_HANDOFF(&ifp->if_snd, m, ifp) ? 0 : ENOBUFS); 359df8bae1dSRodney W. Grimes } 360df8bae1dSRodney W. Grimes 361df8bae1dSRodney W. Grimes /* 3624b984093SLuigi Rizzo * ipfw processing for ethernet packets (in and out). 3634b984093SLuigi Rizzo * The second parameter is NULL from ether_demux, and ifp from 3644b984093SLuigi Rizzo * ether_output_frame. This section of code could be used from 3652f8ebbf4SLuigi Rizzo * bridge.c as well as long as we use some extra info 3664b984093SLuigi Rizzo * to distinguish that case from ether_output_frame(); 3674b984093SLuigi Rizzo */ 3684b984093SLuigi Rizzo int 3694b984093SLuigi Rizzo ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, 370c1d93b05SSam Leffler struct ip_fw **rule, int shared) 3714b984093SLuigi Rizzo { 372c1d93b05SSam Leffler struct ether_header *eh; 373c1d93b05SSam Leffler struct ether_header save_eh; 374c1d93b05SSam Leffler struct mbuf *m; 3754b984093SLuigi Rizzo int i; 3762b25acc1SLuigi Rizzo struct ip_fw_args args; 3774b984093SLuigi Rizzo 37897850a5dSLuigi Rizzo if (*rule != NULL && fw_one_pass) 379015d72e0SLuigi Rizzo return 1; /* dummynet packet, already partially processed */ 3802f8ebbf4SLuigi Rizzo 3814b984093SLuigi Rizzo /* 3822f8ebbf4SLuigi Rizzo * I need some amt of data to be contiguous, and in case others need 3834b984093SLuigi Rizzo * the packet (shared==1) also better be in the first mbuf. 3844b984093SLuigi Rizzo */ 385c1d93b05SSam Leffler m = *m0; 386c1d93b05SSam Leffler i = min( m->m_pkthdr.len, max_protohdr); 387c1d93b05SSam Leffler if ( shared || m->m_len < i) { 388c1d93b05SSam Leffler m = m_pullup(m, i); 389c1d93b05SSam Leffler if (m == NULL) { 390c1d93b05SSam Leffler *m0 = m; 3914b984093SLuigi Rizzo return 0; 3924b984093SLuigi Rizzo } 393c1d93b05SSam Leffler } 394c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 395c1d93b05SSam Leffler save_eh = *eh; /* save copy for restore below */ 396c1d93b05SSam Leffler m_adj(m, ETHER_HDR_LEN); /* strip ethernet header */ 3974b984093SLuigi Rizzo 398c1d93b05SSam Leffler args.m = m; /* the packet we are looking at */ 3992b25acc1SLuigi Rizzo args.oif = dst; /* destination, if any */ 4002b25acc1SLuigi Rizzo args.divert_rule = 0; /* we do not support divert yet */ 4012b25acc1SLuigi Rizzo args.rule = *rule; /* matching rule to restart */ 4022b25acc1SLuigi Rizzo args.next_hop = NULL; /* we do not support forward yet */ 4032b25acc1SLuigi Rizzo args.eh = &save_eh; /* MAC header for bridged/MAC packets */ 4042b25acc1SLuigi Rizzo i = ip_fw_chk_ptr(&args); 405c1d93b05SSam Leffler m = args.m; 406c1d93b05SSam Leffler if (m != NULL) { 407c1d93b05SSam Leffler /* 408c1d93b05SSam Leffler * Restore Ethernet header, as needed, in case the 409c1d93b05SSam Leffler * mbuf chain was replaced by ipfw. 410c1d93b05SSam Leffler */ 411a163d034SWarner Losh M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 412c1d93b05SSam Leffler if (m == NULL) { 413c1d93b05SSam Leffler *m0 = m; 414c1d93b05SSam Leffler return 0; 415c1d93b05SSam Leffler } 416c1d93b05SSam Leffler if (eh != mtod(m, struct ether_header *)) 417c1d93b05SSam Leffler bcopy(&save_eh, mtod(m, struct ether_header *), 418c1d93b05SSam Leffler ETHER_HDR_LEN); 419c1d93b05SSam Leffler } 420c1d93b05SSam Leffler *m0 = m; 4212b25acc1SLuigi Rizzo *rule = args.rule; 4222b25acc1SLuigi Rizzo 423c1d93b05SSam Leffler if ( (i & IP_FW_PORT_DENY_FLAG) || m == NULL) /* drop */ 4244b984093SLuigi Rizzo return 0; 4254b984093SLuigi Rizzo 4264b984093SLuigi Rizzo if (i == 0) /* a PASS rule. */ 4274b984093SLuigi Rizzo return 1; 4284b984093SLuigi Rizzo 4294b984093SLuigi Rizzo if (DUMMYNET_LOADED && (i & IP_FW_PORT_DYNT_FLAG)) { 4304b984093SLuigi Rizzo /* 4314b984093SLuigi Rizzo * Pass the pkt to dummynet, which consumes it. 4324b984093SLuigi Rizzo * If shared, make a copy and keep the original. 4334b984093SLuigi Rizzo */ 4344b984093SLuigi Rizzo if (shared) { 435a163d034SWarner Losh m = m_copypacket(m, M_DONTWAIT); 4362b25acc1SLuigi Rizzo if (m == NULL) 4374b984093SLuigi Rizzo return 0; 4384b984093SLuigi Rizzo } else { 4392b25acc1SLuigi Rizzo /* 440c1d93b05SSam Leffler * Pass the original to dummynet and 441c1d93b05SSam Leffler * nothing back to the caller 4422b25acc1SLuigi Rizzo */ 443c1d93b05SSam Leffler *m0 = NULL ; 4444b984093SLuigi Rizzo } 4452b25acc1SLuigi Rizzo ip_dn_io_ptr(m, (i & 0xffff), 4462b25acc1SLuigi Rizzo dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args); 4474b984093SLuigi Rizzo return 0; 4484b984093SLuigi Rizzo } 4494b984093SLuigi Rizzo /* 4502f8ebbf4SLuigi Rizzo * XXX at some point add support for divert/forward actions. 4512f8ebbf4SLuigi Rizzo * If none of the above matches, we have to drop the pkt. 4524b984093SLuigi Rizzo */ 4534b984093SLuigi Rizzo return 0; 4544b984093SLuigi Rizzo } 4554b984093SLuigi Rizzo 4564b984093SLuigi Rizzo /* 457c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 458c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 459df8bae1dSRodney W. Grimes */ 460c1d93b05SSam Leffler static void 461c1d93b05SSam Leffler ether_input(struct ifnet *ifp, struct mbuf *m) 462df8bae1dSRodney W. Grimes { 463c1d93b05SSam Leffler struct ether_header *eh; 464c1d93b05SSam Leffler u_short etype; 465df8bae1dSRodney W. Grimes 466c1d93b05SSam Leffler /* 467c1d93b05SSam Leffler * Do consistency checks to verify assumptions 468c1d93b05SSam Leffler * made by code past this point. 469c1d93b05SSam Leffler */ 470c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 471c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 472c1d93b05SSam Leffler ifp->if_ierrors++; 473c939f1aeSLuigi Rizzo m_freem(m); 474c939f1aeSLuigi Rizzo return; 475c939f1aeSLuigi Rizzo } 476797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 477c1d93b05SSam Leffler /* XXX maybe should pullup? */ 478c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 479c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 480c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 481c1d93b05SSam Leffler ifp->if_ierrors++; 482c1d93b05SSam Leffler m_freem(m); 483c1d93b05SSam Leffler return; 4842e2de7f2SArchie Cobbs } 485c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 486c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 487c1d93b05SSam Leffler if (m->m_pkthdr.len > 488c1d93b05SSam Leffler ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 489c1d93b05SSam Leffler if_printf(ifp, "discard oversize frame " 490c1d93b05SSam Leffler "(ether type %x flags %x len %u > max %lu)\n", 491c1d93b05SSam Leffler etype, m->m_flags, m->m_pkthdr.len, 492c1d93b05SSam Leffler ETHER_MAX_FRAME(ifp, etype, 493c1d93b05SSam Leffler m->m_flags & M_HASFCS)); 494c1d93b05SSam Leffler ifp->if_ierrors++; 495c1d93b05SSam Leffler m_freem(m); 496c1d93b05SSam Leffler return; 497c1d93b05SSam Leffler } 498c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 499c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 500c1d93b05SSam Leffler ifp->if_ierrors++; 501c1d93b05SSam Leffler m_freem(m); 502c1d93b05SSam Leffler return; 503c1d93b05SSam Leffler } 504c1d93b05SSam Leffler #ifdef DIAGNOSTIC 505c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 506c1d93b05SSam Leffler if_printf(ifp, "Warning, frame marked as received on %s%u\n", 507c1d93b05SSam Leffler m->m_pkthdr.rcvif->if_name, 508c1d93b05SSam Leffler m->m_pkthdr.rcvif->if_unit); 509c1d93b05SSam Leffler } 510c1d93b05SSam Leffler #endif 511c1d93b05SSam Leffler 512c1d93b05SSam Leffler /* 513c1d93b05SSam Leffler * Give bpf a chance at the packet. 514c1d93b05SSam Leffler */ 515c1d93b05SSam Leffler BPF_MTAP(ifp, m); 5162e2de7f2SArchie Cobbs 517afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) { 518c1d93b05SSam Leffler /* 519c1d93b05SSam Leffler * Interface marked for monitoring; discard packet. 520c1d93b05SSam Leffler */ 521afbe3a0fSPoul-Henning Kamp m_freem(m); 522afbe3a0fSPoul-Henning Kamp return; 523afbe3a0fSPoul-Henning Kamp } 524afbe3a0fSPoul-Henning Kamp 525c1d93b05SSam Leffler /* If the CRC is still on the packet, trim it off. */ 526c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 527c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 528c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 529c1d93b05SSam Leffler } 530c1d93b05SSam Leffler 5312201e1b0SPoul-Henning Kamp #ifdef MAC 5322201e1b0SPoul-Henning Kamp mac_create_mbuf_from_ifnet(ifp, m); 5332201e1b0SPoul-Henning Kamp #endif 5342201e1b0SPoul-Henning Kamp 535c1d93b05SSam Leffler ifp->if_ibytes += m->m_pkthdr.len; 53605463bb5SDavid Greenman 537e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 538e1e1452dSArchie Cobbs if (ng_ether_input_p != NULL) { 539c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 540e1e1452dSArchie Cobbs if (m == NULL) 541e1e1452dSArchie Cobbs return; 542e1e1452dSArchie Cobbs } 543e1e1452dSArchie Cobbs 5442e2de7f2SArchie Cobbs /* Check for bridging mode */ 5457b109fa4SLuigi Rizzo if (BDG_ACTIVE(ifp) ) { 5462e2de7f2SArchie Cobbs struct ifnet *bif; 5472e2de7f2SArchie Cobbs 548c1d93b05SSam Leffler /* 549c1d93b05SSam Leffler * Check with bridging code to see how the packet 550c1d93b05SSam Leffler * should be handled. Possibilities are: 551c1d93b05SSam Leffler * 552c1d93b05SSam Leffler * BDG_BCAST broadcast 553c1d93b05SSam Leffler * BDG_MCAST multicast 554c1d93b05SSam Leffler * BDG_LOCAL for local address, don't forward 555c1d93b05SSam Leffler * BDG_DROP discard 556c1d93b05SSam Leffler * ifp forward only to specified interface(s) 557c1d93b05SSam Leffler * 558c1d93b05SSam Leffler * Non-local destinations are handled by passing the 559c1d93b05SSam Leffler * packet back to the bridge code. 560c1d93b05SSam Leffler */ 561c1d93b05SSam Leffler bif = bridge_in_ptr(ifp, eh); 562c1d93b05SSam Leffler if (bif == BDG_DROP) { /* discard packet */ 5632e2de7f2SArchie Cobbs m_freem(m); 5642e2de7f2SArchie Cobbs return; 5652e2de7f2SArchie Cobbs } 566c1d93b05SSam Leffler if (bif != BDG_LOCAL) { /* non-local, forward */ 567c1d93b05SSam Leffler m = bdg_forward_ptr(m, bif); 568ddacb30fSBosko Milekic /* 569c1d93b05SSam Leffler * The bridge may consume the packet if it's not 570c1d93b05SSam Leffler * supposed to be passed up or if a problem occurred 571c1d93b05SSam Leffler * while doing its job. This is reflected by it 572c1d93b05SSam Leffler * returning a NULL mbuf pointer. 573ddacb30fSBosko Milekic */ 574507b4b54SLuigi Rizzo if (m == NULL) { 575507b4b54SLuigi Rizzo if (bif == BDG_BCAST || bif == BDG_MCAST) 576c1d93b05SSam Leffler if_printf(ifp, 577c1d93b05SSam Leffler "bridge dropped %s packet\n", 578c1d93b05SSam Leffler bif == BDG_BCAST ? "broadcast" : 579c1d93b05SSam Leffler "multicast"); 580ddacb30fSBosko Milekic return; 581ddacb30fSBosko Milekic } 582c1d93b05SSam Leffler /* 583c1d93b05SSam Leffler * But in some cases the bridge may return the 584c1d93b05SSam Leffler * packet for us to free; sigh. 585c1d93b05SSam Leffler */ 586c1d93b05SSam Leffler if (bif != BDG_BCAST && bif != BDG_MCAST) { 5872e2de7f2SArchie Cobbs m_freem(m); 5882e2de7f2SArchie Cobbs return; 5892e2de7f2SArchie Cobbs } 590c1d93b05SSam Leffler } 591c1d93b05SSam Leffler } 5922e2de7f2SArchie Cobbs 593c1d93b05SSam Leffler ether_demux(ifp, m); 594a6ddbff0SPoul-Henning Kamp /* First chunk of an mbuf contains good entropy */ 59510b1fde0SMark Murray if (harvest.ethernet) 59610b1fde0SMark Murray random_harvest(m, 16, 3, 0, RANDOM_NET); 597e1e1452dSArchie Cobbs } 598e1e1452dSArchie Cobbs 599e1e1452dSArchie Cobbs /* 600e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 601e1e1452dSArchie Cobbs */ 602e1e1452dSArchie Cobbs void 603c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 604e1e1452dSArchie Cobbs { 605c1d93b05SSam Leffler struct ether_header *eh; 6061cafed39SJonathan Lemon int isr; 607e1e1452dSArchie Cobbs u_short ether_type; 608e1e1452dSArchie Cobbs #if defined(NETATALK) 609098a8c3bSMatthew N. Dodd struct llc *l; 610e1e1452dSArchie Cobbs #endif 6114b984093SLuigi Rizzo struct ip_fw *rule = NULL; 6122b25acc1SLuigi Rizzo 6132b25acc1SLuigi Rizzo /* Extract info from dummynet tag, ignore others */ 6142b25acc1SLuigi Rizzo for (;m->m_type == MT_TAG; m = m->m_next) 6152b25acc1SLuigi Rizzo if (m->m_flags == PACKET_TAG_DUMMYNET) { 6162b25acc1SLuigi Rizzo rule = ((struct dn_pkt *)m)->rule; 6172b25acc1SLuigi Rizzo ifp = m->m_next->m_pkthdr.rcvif; 6184b984093SLuigi Rizzo } 6192b25acc1SLuigi Rizzo 620c1d93b05SSam Leffler KASSERT(ifp != NULL, ("ether_demux: NULL interface pointer")); 621c1d93b05SSam Leffler 622c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 623c1d93b05SSam Leffler 6242b25acc1SLuigi Rizzo if (rule) /* packet was already bridged */ 6252b25acc1SLuigi Rizzo goto post_stats; 6264b984093SLuigi Rizzo 627c6943100SPoul-Henning Kamp if (!(BDG_ACTIVE(ifp))) { 628c6943100SPoul-Henning Kamp /* 629c6943100SPoul-Henning Kamp * Discard packet if upper layers shouldn't see it because it 630c6943100SPoul-Henning Kamp * was unicast to a different Ethernet address. If the driver 631c6943100SPoul-Henning Kamp * is working properly, then this situation can only happen 632c6943100SPoul-Henning Kamp * when the interface is in promiscuous mode. 633c6943100SPoul-Henning Kamp */ 634cb24f323SArchie Cobbs if ((ifp->if_flags & IFF_PROMISC) != 0 635cb24f323SArchie Cobbs && (eh->ether_dhost[0] & 1) == 0 636cb24f323SArchie Cobbs && bcmp(eh->ether_dhost, 637ffb079beSMaxim Sobolev IFP2AC(ifp)->ac_enaddr, ETHER_ADDR_LEN) != 0 63825faf49dSMaxim Sobolev && (ifp->if_flags & IFF_PPROMISC) == 0) { 639cb24f323SArchie Cobbs m_freem(m); 640cb24f323SArchie Cobbs return; 641cb24f323SArchie Cobbs } 642c6943100SPoul-Henning Kamp } 643cb24f323SArchie Cobbs 6442e2de7f2SArchie Cobbs /* Discard packet if interface is not up */ 645df8bae1dSRodney W. Grimes if ((ifp->if_flags & IFF_UP) == 0) { 646df8bae1dSRodney W. Grimes m_freem(m); 647df8bae1dSRodney W. Grimes return; 648df8bae1dSRodney W. Grimes } 6492cc2df49SGarrett Wollman if (eh->ether_dhost[0] & 1) { 650df8bae1dSRodney W. Grimes if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost, 651df8bae1dSRodney W. Grimes sizeof(etherbroadcastaddr)) == 0) 652df8bae1dSRodney W. Grimes m->m_flags |= M_BCAST; 6532cc2df49SGarrett Wollman else 654df8bae1dSRodney W. Grimes m->m_flags |= M_MCAST; 6552cc2df49SGarrett Wollman } 656df8bae1dSRodney W. Grimes if (m->m_flags & (M_BCAST|M_MCAST)) 657df8bae1dSRodney W. Grimes ifp->if_imcasts++; 658df8bae1dSRodney W. Grimes 6594b984093SLuigi Rizzo post_stats: 6604b984093SLuigi Rizzo if (IPFW_LOADED && ether_ipfw != 0) { 661c1d93b05SSam Leffler if (ether_ipfw_chk(&m, NULL, &rule, 0) == 0) { 6624b984093SLuigi Rizzo if (m) 6634b984093SLuigi Rizzo m_freem(m); 6644b984093SLuigi Rizzo return; 6654b984093SLuigi Rizzo } 6664b984093SLuigi Rizzo } 6674b984093SLuigi Rizzo 668c1d93b05SSam Leffler /* 669c1d93b05SSam Leffler * If VLANs are configured on the interface, check to 670c1d93b05SSam Leffler * see if the device performed the decapsulation and 671c1d93b05SSam Leffler * provided us with the tag. 672c1d93b05SSam Leffler */ 673c1d93b05SSam Leffler if (ifp->if_nvlans && 674c1d93b05SSam Leffler m_tag_locate(m, MTAG_VLAN, MTAG_VLAN_TAG, NULL) != NULL) { 675c1d93b05SSam Leffler /* 676c1d93b05SSam Leffler * vlan_input() will either recursively call ether_input() 677c1d93b05SSam Leffler * or drop the packet. 678c1d93b05SSam Leffler */ 679c1d93b05SSam Leffler KASSERT(vlan_input_p != NULL,("ether_input: VLAN not loaded!")); 680c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 681c1d93b05SSam Leffler return; 682c1d93b05SSam Leffler } 683c1d93b05SSam Leffler 684307d80beSDavid Greenman ether_type = ntohs(eh->ether_type); 685307d80beSDavid Greenman 686c1d93b05SSam Leffler /* 687c1d93b05SSam Leffler * Handle protocols that expect to have the Ethernet header 688c1d93b05SSam Leffler * (and possibly FCS) intact. 689c1d93b05SSam Leffler */ 690c1d93b05SSam Leffler switch (ether_type) { 691c1d93b05SSam Leffler case ETHERTYPE_VLAN: 692c1d93b05SSam Leffler if (ifp->if_nvlans != 0) { 693c1d93b05SSam Leffler KASSERT(vlan_input_p,("ether_input: VLAN not loaded!")); 694c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 695c1d93b05SSam Leffler } else { 696c1d93b05SSam Leffler ifp->if_noproto++; 697c1d93b05SSam Leffler m_freem(m); 698c1d93b05SSam Leffler } 699c1d93b05SSam Leffler return; 700c1d93b05SSam Leffler } 701c1d93b05SSam Leffler 702c1d93b05SSam Leffler /* Strip off Ethernet header. */ 703797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 704c1d93b05SSam Leffler 705c1d93b05SSam Leffler /* If the CRC is still on the packet, trim it off. */ 706c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 707c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 708c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 709c1d93b05SSam Leffler } 710c1d93b05SSam Leffler 711307d80beSDavid Greenman switch (ether_type) { 712df8bae1dSRodney W. Grimes #ifdef INET 713df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 7141f91d8c5SDavid Greenman if (ipflow_fastforward(m)) 7151f91d8c5SDavid Greenman return; 7161cafed39SJonathan Lemon isr = NETISR_IP; 717df8bae1dSRodney W. Grimes break; 718df8bae1dSRodney W. Grimes 719df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 72008aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 72108aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 72208aadfbbSJonathan Lemon m_freem(m); 72308aadfbbSJonathan Lemon return; 72408aadfbbSJonathan Lemon } 7251cafed39SJonathan Lemon isr = NETISR_ARP; 726df8bae1dSRodney W. Grimes break; 727df8bae1dSRodney W. Grimes #endif 728cc6a66f2SJulian Elischer #ifdef IPX 729cc6a66f2SJulian Elischer case ETHERTYPE_IPX: 7304f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 7314f93599fSBoris Popov return; 7321cafed39SJonathan Lemon isr = NETISR_IPX; 733cc6a66f2SJulian Elischer break; 734cc6a66f2SJulian Elischer #endif 73582cd038dSYoshinobu Inoue #ifdef INET6 73682cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 7371cafed39SJonathan Lemon isr = NETISR_IPV6; 73882cd038dSYoshinobu Inoue break; 73982cd038dSYoshinobu Inoue #endif 740655929bfSJulian Elischer #ifdef NETATALK 741655929bfSJulian Elischer case ETHERTYPE_AT: 7421cafed39SJonathan Lemon isr = NETISR_ATALK1; 743655929bfSJulian Elischer break; 744655929bfSJulian Elischer case ETHERTYPE_AARP: 7451cafed39SJonathan Lemon isr = NETISR_AARP; 7461cafed39SJonathan Lemon break; 7478cdfefbdSPeter Wemm #endif /* NETATALK */ 748df8bae1dSRodney W. Grimes default: 7494f93599fSBoris Popov #ifdef IPX 7504f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 7514f93599fSBoris Popov return; 7524f93599fSBoris Popov #endif /* IPX */ 753242c5536SPeter Wemm #if defined(NETATALK) 754307d80beSDavid Greenman if (ether_type > ETHERMTU) 755c1d93b05SSam Leffler goto discard; 756df8bae1dSRodney W. Grimes l = mtod(m, struct llc *); 7571cafed39SJonathan Lemon if (l->llc_dsap == LLC_SNAP_LSAP && 7581cafed39SJonathan Lemon l->llc_ssap == LLC_SNAP_LSAP && 7591cafed39SJonathan Lemon l->llc_control == LLC_UI) { 760655929bfSJulian Elischer if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code, 761655929bfSJulian Elischer sizeof(at_org_code)) == 0 && 762655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 763797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 7641cafed39SJonathan Lemon isr = NETISR_ATALK2; 765655929bfSJulian Elischer break; 766655929bfSJulian Elischer } 767655929bfSJulian Elischer if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 768655929bfSJulian Elischer sizeof(aarp_org_code)) == 0 && 769655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 770797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 7711cafed39SJonathan Lemon isr = NETISR_AARP; 772655929bfSJulian Elischer break; 773df8bae1dSRodney W. Grimes } 7741cafed39SJonathan Lemon } 775242c5536SPeter Wemm #endif /* NETATALK */ 7761cafed39SJonathan Lemon goto discard; 777df8bae1dSRodney W. Grimes } 7781cafed39SJonathan Lemon netisr_dispatch(isr, m); 779c1d93b05SSam Leffler return; 7801cafed39SJonathan Lemon 781c1d93b05SSam Leffler discard: 782c1d93b05SSam Leffler /* 783c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 784c1d93b05SSam Leffler * hand the packet to it for last chance processing; 785c1d93b05SSam Leffler * otherwise dispose of it. 786c1d93b05SSam Leffler */ 787c1d93b05SSam Leffler if (ng_ether_input_orphan_p != NULL) { 788c1d93b05SSam Leffler /* 789c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 790c1d93b05SSam Leffler * consistent view of inbound packets. 791c1d93b05SSam Leffler */ 792797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 793c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 794c1d93b05SSam Leffler return; 795c1d93b05SSam Leffler } 796c1d93b05SSam Leffler m_freem(m); 797c1d93b05SSam Leffler } 798c1d93b05SSam Leffler 799c1d93b05SSam Leffler /* 800c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 801c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 802c1d93b05SSam Leffler * 803c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 804c1d93b05SSam Leffler * 805c1d93b05SSam Leffler * since there's no static buffer involved. 806c1d93b05SSam Leffler */ 807c1d93b05SSam Leffler char * 808c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 809c1d93b05SSam Leffler { 810c1d93b05SSam Leffler static char etherbuf[18]; 811c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 812c1d93b05SSam Leffler return (etherbuf); 813df8bae1dSRodney W. Grimes } 814df8bae1dSRodney W. Grimes 815df8bae1dSRodney W. Grimes /* 816df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 817df8bae1dSRodney W. Grimes */ 818df8bae1dSRodney W. Grimes void 819c1d93b05SSam Leffler ether_ifattach(struct ifnet *ifp, const u_int8_t *llc) 820df8bae1dSRodney W. Grimes { 821098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 822098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 823df8bae1dSRodney W. Grimes 824df8bae1dSRodney W. Grimes ifp->if_type = IFT_ETHER; 825c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 826c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 827cfeff1b6SJonathan Lemon if_attach(ifp); 828df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 829c1d93b05SSam Leffler ifp->if_output = ether_output; 830c1d93b05SSam Leffler ifp->if_input = ether_input; 8311158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 832a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 833c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 834322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 835c1d93b05SSam Leffler 836f9132cebSJonathan Lemon ifa = ifaddr_byindex(ifp->if_index); 8376e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 83859562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 839df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 840df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 841c1d93b05SSam Leffler bcopy(llc, LLADDR(sdl), ifp->if_addrlen); 842c1d93b05SSam Leffler /* 843c1d93b05SSam Leffler * XXX: This doesn't belong here; we do it until 844c1d93b05SSam Leffler * XXX: all drivers are cleaned up 845c1d93b05SSam Leffler */ 846c1d93b05SSam Leffler if (llc != IFP2AC(ifp)->ac_enaddr) 847c1d93b05SSam Leffler bcopy(llc, IFP2AC(ifp)->ac_enaddr, ifp->if_addrlen); 848c1d93b05SSam Leffler 849797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 850e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 851e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 8527b109fa4SLuigi Rizzo if (BDG_LOADED) 853db69a05dSPaul Saab bdgtakeifaces_ptr(); 854e1e1452dSArchie Cobbs } 855e1e1452dSArchie Cobbs 85621b8ebd9SArchie Cobbs /* 85721b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 85821b8ebd9SArchie Cobbs */ 85921b8ebd9SArchie Cobbs void 860c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 86121b8ebd9SArchie Cobbs { 86221b8ebd9SArchie Cobbs if (ng_ether_detach_p != NULL) 86321b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 86421b8ebd9SArchie Cobbs bpfdetach(ifp); 86521b8ebd9SArchie Cobbs if_detach(ifp); 8667b109fa4SLuigi Rizzo if (BDG_LOADED) 867db69a05dSPaul Saab bdgtakeifaces_ptr(); 86821b8ebd9SArchie Cobbs } 86921b8ebd9SArchie Cobbs 870ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 871602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 8724b984093SLuigi Rizzo SYSCTL_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW, 8734b984093SLuigi Rizzo ðer_ipfw,0,"Pass ether pkts through firewall"); 87430106f6aSPoul-Henning Kamp 875fb583156SDavid Greenman int 876c5a1016bSBruce Evans ether_ioctl(ifp, command, data) 877c5a1016bSBruce Evans struct ifnet *ifp; 878c5a1016bSBruce Evans int command; 879c5a1016bSBruce Evans caddr_t data; 88030106f6aSPoul-Henning Kamp { 88130106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 88230106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 883fb583156SDavid Greenman int error = 0; 88430106f6aSPoul-Henning Kamp 88530106f6aSPoul-Henning Kamp switch (command) { 88630106f6aSPoul-Henning Kamp case SIOCSIFADDR: 88730106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 88830106f6aSPoul-Henning Kamp 88930106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 89030106f6aSPoul-Henning Kamp #ifdef INET 89130106f6aSPoul-Henning Kamp case AF_INET: 89230106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 893322dcb8dSMax Khon arp_ifinit(ifp, ifa); 89430106f6aSPoul-Henning Kamp break; 89530106f6aSPoul-Henning Kamp #endif 89630106f6aSPoul-Henning Kamp #ifdef IPX 89730106f6aSPoul-Henning Kamp /* 89830106f6aSPoul-Henning Kamp * XXX - This code is probably wrong 89930106f6aSPoul-Henning Kamp */ 90030106f6aSPoul-Henning Kamp case AF_IPX: 90130106f6aSPoul-Henning Kamp { 902098a8c3bSMatthew N. Dodd struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 9034c8e8c05SJulian Elischer struct arpcom *ac = IFP2AC(ifp); 90430106f6aSPoul-Henning Kamp 90530106f6aSPoul-Henning Kamp if (ipx_nullhost(*ina)) 90630106f6aSPoul-Henning Kamp ina->x_host = 90786101139SPoul-Henning Kamp *(union ipx_host *) 90886101139SPoul-Henning Kamp ac->ac_enaddr; 90930106f6aSPoul-Henning Kamp else { 91030106f6aSPoul-Henning Kamp bcopy((caddr_t) ina->x_host.c_host, 91186101139SPoul-Henning Kamp (caddr_t) ac->ac_enaddr, 91286101139SPoul-Henning Kamp sizeof(ac->ac_enaddr)); 91330106f6aSPoul-Henning Kamp } 91430106f6aSPoul-Henning Kamp 91530106f6aSPoul-Henning Kamp /* 91630106f6aSPoul-Henning Kamp * Set new address 91730106f6aSPoul-Henning Kamp */ 91830106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 91930106f6aSPoul-Henning Kamp break; 92030106f6aSPoul-Henning Kamp } 92130106f6aSPoul-Henning Kamp #endif 92230106f6aSPoul-Henning Kamp default: 92330106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 92430106f6aSPoul-Henning Kamp break; 92530106f6aSPoul-Henning Kamp } 92630106f6aSPoul-Henning Kamp break; 92730106f6aSPoul-Henning Kamp 92830106f6aSPoul-Henning Kamp case SIOCGIFADDR: 92930106f6aSPoul-Henning Kamp { 93030106f6aSPoul-Henning Kamp struct sockaddr *sa; 93130106f6aSPoul-Henning Kamp 93230106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 9334c8e8c05SJulian Elischer bcopy(IFP2AC(ifp)->ac_enaddr, 93430106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 93530106f6aSPoul-Henning Kamp } 93630106f6aSPoul-Henning Kamp break; 937fb583156SDavid Greenman 938fb583156SDavid Greenman case SIOCSIFMTU: 939fb583156SDavid Greenman /* 940fb583156SDavid Greenman * Set the interface MTU. 941fb583156SDavid Greenman */ 942fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 943fb583156SDavid Greenman error = EINVAL; 944fb583156SDavid Greenman } else { 945fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 94630106f6aSPoul-Henning Kamp } 947fb583156SDavid Greenman break; 948c1d93b05SSam Leffler default: 949c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 950c1d93b05SSam Leffler break; 951fb583156SDavid Greenman } 952fb583156SDavid Greenman return (error); 95330106f6aSPoul-Henning Kamp } 9541158dfb7SGarrett Wollman 95537c84183SPoul-Henning Kamp static int 9561158dfb7SGarrett Wollman ether_resolvemulti(ifp, llsa, sa) 9571158dfb7SGarrett Wollman struct ifnet *ifp; 9581158dfb7SGarrett Wollman struct sockaddr **llsa; 9591158dfb7SGarrett Wollman struct sockaddr *sa; 9601158dfb7SGarrett Wollman { 9611158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 9621158dfb7SGarrett Wollman struct sockaddr_in *sin; 96382cd038dSYoshinobu Inoue #ifdef INET6 96482cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 96582cd038dSYoshinobu Inoue #endif 9661158dfb7SGarrett Wollman u_char *e_addr; 9671158dfb7SGarrett Wollman 9681158dfb7SGarrett Wollman switch(sa->sa_family) { 9691158dfb7SGarrett Wollman case AF_LINK: 9707f33a738SJulian Elischer /* 9717f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 9727f33a738SJulian Elischer */ 9731158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 9741158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 9751158dfb7SGarrett Wollman if ((e_addr[0] & 1) != 1) 9761158dfb7SGarrett Wollman return EADDRNOTAVAIL; 9771158dfb7SGarrett Wollman *llsa = 0; 9781158dfb7SGarrett Wollman return 0; 9791158dfb7SGarrett Wollman 9801158dfb7SGarrett Wollman #ifdef INET 9811158dfb7SGarrett Wollman case AF_INET: 9821158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 9831158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 9841158dfb7SGarrett Wollman return EADDRNOTAVAIL; 9851158dfb7SGarrett Wollman MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 986a163d034SWarner Losh M_WAITOK|M_ZERO); 9871158dfb7SGarrett Wollman sdl->sdl_len = sizeof *sdl; 9881158dfb7SGarrett Wollman sdl->sdl_family = AF_LINK; 9891158dfb7SGarrett Wollman sdl->sdl_index = ifp->if_index; 9901158dfb7SGarrett Wollman sdl->sdl_type = IFT_ETHER; 9911158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 9921158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 9931158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 9941158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 9951158dfb7SGarrett Wollman return 0; 9961158dfb7SGarrett Wollman #endif 99782cd038dSYoshinobu Inoue #ifdef INET6 99882cd038dSYoshinobu Inoue case AF_INET6: 99982cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 1000595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1001595b8a1cSJun-ichiro itojun Hagino /* 1002595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 1003595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 1004595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 1005595b8a1cSJun-ichiro itojun Hagino */ 1006595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 1007595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 1008595b8a1cSJun-ichiro itojun Hagino return 0; 1009595b8a1cSJun-ichiro itojun Hagino } 101082cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 101182cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 101282cd038dSYoshinobu Inoue MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 1013a163d034SWarner Losh M_WAITOK|M_ZERO); 101482cd038dSYoshinobu Inoue sdl->sdl_len = sizeof *sdl; 101582cd038dSYoshinobu Inoue sdl->sdl_family = AF_LINK; 101682cd038dSYoshinobu Inoue sdl->sdl_index = ifp->if_index; 101782cd038dSYoshinobu Inoue sdl->sdl_type = IFT_ETHER; 101882cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 101982cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 102082cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 102182cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 102282cd038dSYoshinobu Inoue return 0; 102382cd038dSYoshinobu Inoue #endif 10241158dfb7SGarrett Wollman 10251158dfb7SGarrett Wollman default: 10261158dfb7SGarrett Wollman /* 10271158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 10281158dfb7SGarrett Wollman * that counts... 10291158dfb7SGarrett Wollman */ 10301158dfb7SGarrett Wollman return EAFNOSUPPORT; 10311158dfb7SGarrett Wollman } 10321158dfb7SGarrett Wollman } 103340811c14SMatthew N. Dodd 103440811c14SMatthew N. Dodd static moduledata_t ether_mod = { 103540811c14SMatthew N. Dodd "ether", 103640811c14SMatthew N. Dodd NULL, 103740811c14SMatthew N. Dodd 0 103840811c14SMatthew N. Dodd }; 103940811c14SMatthew N. Dodd 104040811c14SMatthew N. Dodd DECLARE_MODULE(ether, ether_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 104140811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1042