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; 171df8bae1dSRodney W. Grimes #endif 17282cd038dSYoshinobu Inoue #ifdef INET6 17382cd038dSYoshinobu Inoue case AF_INET6: 17482cd038dSYoshinobu Inoue if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, (u_char *)edst)) { 175fef5fd23SBosko Milekic /* Something bad happened */ 17682cd038dSYoshinobu Inoue return(0); 17782cd038dSYoshinobu Inoue } 17882cd038dSYoshinobu Inoue type = htons(ETHERTYPE_IPV6); 17982cd038dSYoshinobu Inoue break; 18082cd038dSYoshinobu Inoue #endif 181cc6a66f2SJulian Elischer #ifdef IPX 182cc6a66f2SJulian Elischer case AF_IPX: 1834f93599fSBoris Popov if (ef_outputp) { 1842a7e8eceSBoris Popov error = ef_outputp(ifp, &m, dst, &type, &hlen); 1855accfb8cSBoris Popov if (error) 1865accfb8cSBoris Popov goto bad; 1874f93599fSBoris Popov } else 18834bed8b0SDavid Greenman type = htons(ETHERTYPE_IPX); 189cc6a66f2SJulian Elischer bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 190cc6a66f2SJulian Elischer (caddr_t)edst, sizeof (edst)); 191cc6a66f2SJulian Elischer break; 192cc6a66f2SJulian Elischer #endif 193655929bfSJulian Elischer #ifdef NETATALK 194655929bfSJulian Elischer case AF_APPLETALK: 1951d0eab59SJulian Elischer { 196ed7509acSJulian Elischer struct at_ifaddr *aa; 1971d0eab59SJulian Elischer 198ed7509acSJulian Elischer if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) { 1991d0eab59SJulian Elischer goto bad; 2001d0eab59SJulian Elischer } 201ed7509acSJulian Elischer if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) 2021d0eab59SJulian Elischer return (0); 203655929bfSJulian Elischer /* 204ed7509acSJulian Elischer * In the phase 2 case, need to prepend an mbuf for the llc header. 205655929bfSJulian Elischer * Since we must preserve the value of m, which is passed to us by 206655929bfSJulian Elischer * value, we m_copy() the first mbuf, and use it for our llc header. 207655929bfSJulian Elischer */ 208655929bfSJulian Elischer if ( aa->aa_flags & AFA_PHASE2 ) { 209655929bfSJulian Elischer struct llc llc; 210655929bfSJulian Elischer 211797f247bSMatthew N. Dodd M_PREPEND(m, LLC_SNAPFRAMELEN, M_TRYWAIT); 2122166ffe8SRobert Watson if (m == NULL) 2132166ffe8SRobert Watson senderr(ENOBUFS); 214655929bfSJulian Elischer llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 215655929bfSJulian Elischer llc.llc_control = LLC_UI; 216655929bfSJulian Elischer bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 217655929bfSJulian Elischer llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 218797f247bSMatthew N. Dodd bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 21934bed8b0SDavid Greenman type = htons(m->m_pkthdr.len); 220797f247bSMatthew N. Dodd hlen = LLC_SNAPFRAMELEN + ETHER_HDR_LEN; 221655929bfSJulian Elischer } else { 22234bed8b0SDavid Greenman type = htons(ETHERTYPE_AT); 223655929bfSJulian Elischer } 224655929bfSJulian Elischer break; 225ed7509acSJulian Elischer } 2268cdfefbdSPeter Wemm #endif /* NETATALK */ 227df8bae1dSRodney W. Grimes 228114ae644SMike Smith case pseudo_AF_HDRCMPLT: 229114ae644SMike Smith hdrcmplt = 1; 230114ae644SMike Smith eh = (struct ether_header *)dst->sa_data; 231114ae644SMike Smith (void)memcpy(esrc, eh->ether_shost, sizeof (esrc)); 232114ae644SMike Smith /* FALLTHROUGH */ 233114ae644SMike Smith 234df8bae1dSRodney W. Grimes case AF_UNSPEC: 2359d3f194dSJulian Elischer loop_copy = -1; /* if this is for us, don't do it */ 236df8bae1dSRodney W. Grimes eh = (struct ether_header *)dst->sa_data; 23794a5d9b6SDavid Greenman (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 238df8bae1dSRodney W. Grimes type = eh->ether_type; 239df8bae1dSRodney W. Grimes break; 240df8bae1dSRodney W. Grimes 241df8bae1dSRodney W. Grimes default: 24229e1b85fSBrooks Davis if_printf(ifp, "can't handle af%d\n", dst->sa_family); 243df8bae1dSRodney W. Grimes senderr(EAFNOSUPPORT); 244df8bae1dSRodney W. Grimes } 245df8bae1dSRodney W. Grimes 246df8bae1dSRodney W. Grimes /* 247df8bae1dSRodney W. Grimes * Add local net header. If no space in first mbuf, 248df8bae1dSRodney W. Grimes * allocate another. 249df8bae1dSRodney W. Grimes */ 250797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 2512166ffe8SRobert Watson if (m == NULL) 252df8bae1dSRodney W. Grimes senderr(ENOBUFS); 253df8bae1dSRodney W. Grimes eh = mtod(m, struct ether_header *); 25494a5d9b6SDavid Greenman (void)memcpy(&eh->ether_type, &type, 255df8bae1dSRodney W. Grimes sizeof(eh->ether_type)); 25694a5d9b6SDavid Greenman (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); 257114ae644SMike Smith if (hdrcmplt) 258114ae644SMike Smith (void)memcpy(eh->ether_shost, esrc, 259114ae644SMike Smith sizeof(eh->ether_shost)); 260114ae644SMike Smith else 26194a5d9b6SDavid Greenman (void)memcpy(eh->ether_shost, ac->ac_enaddr, 262df8bae1dSRodney W. Grimes sizeof(eh->ether_shost)); 263ed7509acSJulian Elischer 264ed7509acSJulian Elischer /* 265ed7509acSJulian Elischer * If a simplex interface, and the packet is being sent to our 266ed7509acSJulian Elischer * Ethernet address or a broadcast address, loopback a copy. 267ed7509acSJulian Elischer * XXX To make a simplex device behave exactly like a duplex 268ed7509acSJulian Elischer * device, we should copy in the case of sending to our own 269ed7509acSJulian Elischer * ethernet address (thus letting the original actually appear 270ed7509acSJulian Elischer * on the wire). However, we don't do that here for security 271ed7509acSJulian Elischer * reasons and compatibility with the original behavior. 272ed7509acSJulian Elischer */ 2734c8e8c05SJulian Elischer if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 2743cd67511SJesper Skriver int csum_flags = 0; 2753cd67511SJesper Skriver 2763cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_IP) 2773cd67511SJesper Skriver csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 2783cd67511SJesper Skriver if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 2793cd67511SJesper Skriver csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 28006f684b0SMatthew N. Dodd 2819d3f194dSJulian Elischer if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 28206f684b0SMatthew N. Dodd struct mbuf *n; 283ed7509acSJulian Elischer 28479db6ff3SArchie Cobbs if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) { 2853cd67511SJesper Skriver n->m_pkthdr.csum_flags |= csum_flags; 2863cd67511SJesper Skriver if (csum_flags & CSUM_DATA_VALID) 2873cd67511SJesper Skriver n->m_pkthdr.csum_data = 0xffff; 28806a429a3SArchie Cobbs (void)if_simloop(ifp, n, dst->sa_family, hlen); 289c1404dc0SArchie Cobbs } else 290c1404dc0SArchie Cobbs ifp->if_iqdrops++; 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 { 325ac9d7e26SMax Laier struct ip_fw *rule = ip_dn_claim_rule(m); 3262b25acc1SLuigi Rizzo 327c1d93b05SSam Leffler if (rule == NULL && BDG_ACTIVE(ifp)) { 328c1d93b05SSam Leffler /* 329c1d93b05SSam Leffler * Beware, the bridge code notices the null rcvif and 330c1d93b05SSam Leffler * uses that identify that it's being called from 331c1d93b05SSam Leffler * ether_output as opposd to ether_input. Yech. 332c1d93b05SSam Leffler */ 333fb5fbe46SLuigi Rizzo m->m_pkthdr.rcvif = NULL; 334c1d93b05SSam Leffler m = bdg_forward_ptr(m, ifp); 3352e2de7f2SArchie Cobbs if (m != NULL) 3362e2de7f2SArchie Cobbs m_freem(m); 3371db59ce6SEivind Eklund return (0); 338fb5fbe46SLuigi Rizzo } 3394b984093SLuigi Rizzo if (IPFW_LOADED && ether_ipfw != 0) { 340c1d93b05SSam Leffler if (ether_ipfw_chk(&m, ifp, &rule, 0) == 0) { 3414b984093SLuigi Rizzo if (m) { 3424b984093SLuigi Rizzo m_freem(m); 343e7909401SDavid Malone return EACCES; /* pkt dropped */ 3444b984093SLuigi Rizzo } else 3454b984093SLuigi Rizzo return 0; /* consumed e.g. in a pipe */ 3464b984093SLuigi Rizzo } 3474b984093SLuigi Rizzo } 3482b25acc1SLuigi Rizzo 349df8bae1dSRodney W. Grimes /* 350df5e1987SJonathan Lemon * Queue message on interface, update output statistics if 351df5e1987SJonathan Lemon * successful, and start output if interface not yet active. 352df8bae1dSRodney W. Grimes */ 353c1d93b05SSam Leffler return (IF_HANDOFF(&ifp->if_snd, m, ifp) ? 0 : ENOBUFS); 354df8bae1dSRodney W. Grimes } 355df8bae1dSRodney W. Grimes 356df8bae1dSRodney W. Grimes /* 3574b984093SLuigi Rizzo * ipfw processing for ethernet packets (in and out). 3584b984093SLuigi Rizzo * The second parameter is NULL from ether_demux, and ifp from 3594b984093SLuigi Rizzo * ether_output_frame. This section of code could be used from 3602f8ebbf4SLuigi Rizzo * bridge.c as well as long as we use some extra info 3614b984093SLuigi Rizzo * to distinguish that case from ether_output_frame(); 3624b984093SLuigi Rizzo */ 3634b984093SLuigi Rizzo int 3644b984093SLuigi Rizzo ether_ipfw_chk(struct mbuf **m0, struct ifnet *dst, 365c1d93b05SSam Leffler struct ip_fw **rule, int shared) 3664b984093SLuigi Rizzo { 367c1d93b05SSam Leffler struct ether_header *eh; 368c1d93b05SSam Leffler struct ether_header save_eh; 369c1d93b05SSam Leffler struct mbuf *m; 3704b984093SLuigi Rizzo int i; 3712b25acc1SLuigi Rizzo struct ip_fw_args args; 3724b984093SLuigi Rizzo 37397850a5dSLuigi Rizzo if (*rule != NULL && fw_one_pass) 374015d72e0SLuigi Rizzo return 1; /* dummynet packet, already partially processed */ 3752f8ebbf4SLuigi Rizzo 3764b984093SLuigi Rizzo /* 3772f8ebbf4SLuigi Rizzo * I need some amt of data to be contiguous, and in case others need 3784b984093SLuigi Rizzo * the packet (shared==1) also better be in the first mbuf. 3794b984093SLuigi Rizzo */ 380c1d93b05SSam Leffler m = *m0; 381c1d93b05SSam Leffler i = min( m->m_pkthdr.len, max_protohdr); 382c1d93b05SSam Leffler if ( shared || m->m_len < i) { 383c1d93b05SSam Leffler m = m_pullup(m, i); 384c1d93b05SSam Leffler if (m == NULL) { 385c1d93b05SSam Leffler *m0 = m; 3864b984093SLuigi Rizzo return 0; 3874b984093SLuigi Rizzo } 388c1d93b05SSam Leffler } 389c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 390c1d93b05SSam Leffler save_eh = *eh; /* save copy for restore below */ 391c1d93b05SSam Leffler m_adj(m, ETHER_HDR_LEN); /* strip ethernet header */ 3924b984093SLuigi Rizzo 393c1d93b05SSam Leffler args.m = m; /* the packet we are looking at */ 3942b25acc1SLuigi Rizzo args.oif = dst; /* destination, if any */ 3952b25acc1SLuigi Rizzo args.rule = *rule; /* matching rule to restart */ 3962b25acc1SLuigi Rizzo args.next_hop = NULL; /* we do not support forward yet */ 3972b25acc1SLuigi Rizzo args.eh = &save_eh; /* MAC header for bridged/MAC packets */ 3982b25acc1SLuigi Rizzo i = ip_fw_chk_ptr(&args); 399c1d93b05SSam Leffler m = args.m; 400c1d93b05SSam Leffler if (m != NULL) { 401c1d93b05SSam Leffler /* 402c1d93b05SSam Leffler * Restore Ethernet header, as needed, in case the 403c1d93b05SSam Leffler * mbuf chain was replaced by ipfw. 404c1d93b05SSam Leffler */ 405a163d034SWarner Losh M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 406c1d93b05SSam Leffler if (m == NULL) { 407c1d93b05SSam Leffler *m0 = m; 408c1d93b05SSam Leffler return 0; 409c1d93b05SSam Leffler } 410c1d93b05SSam Leffler if (eh != mtod(m, struct ether_header *)) 411c1d93b05SSam Leffler bcopy(&save_eh, mtod(m, struct ether_header *), 412c1d93b05SSam Leffler ETHER_HDR_LEN); 413c1d93b05SSam Leffler } 414c1d93b05SSam Leffler *m0 = m; 4152b25acc1SLuigi Rizzo *rule = args.rule; 4162b25acc1SLuigi Rizzo 417c1d93b05SSam Leffler if ( (i & IP_FW_PORT_DENY_FLAG) || m == NULL) /* drop */ 4184b984093SLuigi Rizzo return 0; 4194b984093SLuigi Rizzo 4204b984093SLuigi Rizzo if (i == 0) /* a PASS rule. */ 4214b984093SLuigi Rizzo return 1; 4224b984093SLuigi Rizzo 4234b984093SLuigi Rizzo if (DUMMYNET_LOADED && (i & IP_FW_PORT_DYNT_FLAG)) { 4244b984093SLuigi Rizzo /* 4254b984093SLuigi Rizzo * Pass the pkt to dummynet, which consumes it. 4264b984093SLuigi Rizzo * If shared, make a copy and keep the original. 4274b984093SLuigi Rizzo */ 4284b984093SLuigi Rizzo if (shared) { 429a163d034SWarner Losh m = m_copypacket(m, M_DONTWAIT); 4302b25acc1SLuigi Rizzo if (m == NULL) 4314b984093SLuigi Rizzo return 0; 4324b984093SLuigi Rizzo } else { 4332b25acc1SLuigi Rizzo /* 434c1d93b05SSam Leffler * Pass the original to dummynet and 435c1d93b05SSam Leffler * nothing back to the caller 4362b25acc1SLuigi Rizzo */ 437c1d93b05SSam Leffler *m0 = NULL ; 4384b984093SLuigi Rizzo } 4392b25acc1SLuigi Rizzo ip_dn_io_ptr(m, (i & 0xffff), 4402b25acc1SLuigi Rizzo dst ? DN_TO_ETH_OUT: DN_TO_ETH_DEMUX, &args); 4414b984093SLuigi Rizzo return 0; 4424b984093SLuigi Rizzo } 4434b984093SLuigi Rizzo /* 4442f8ebbf4SLuigi Rizzo * XXX at some point add support for divert/forward actions. 4452f8ebbf4SLuigi Rizzo * If none of the above matches, we have to drop the pkt. 4464b984093SLuigi Rizzo */ 4474b984093SLuigi Rizzo return 0; 4484b984093SLuigi Rizzo } 4494b984093SLuigi Rizzo 4504b984093SLuigi Rizzo /* 451c1d93b05SSam Leffler * Process a received Ethernet packet; the packet is in the 452c1d93b05SSam Leffler * mbuf chain m with the ethernet header at the front. 453df8bae1dSRodney W. Grimes */ 454c1d93b05SSam Leffler static void 455c1d93b05SSam Leffler ether_input(struct ifnet *ifp, struct mbuf *m) 456df8bae1dSRodney W. Grimes { 457c1d93b05SSam Leffler struct ether_header *eh; 458c1d93b05SSam Leffler u_short etype; 459df8bae1dSRodney W. Grimes 460c1d93b05SSam Leffler /* 461c1d93b05SSam Leffler * Do consistency checks to verify assumptions 462c1d93b05SSam Leffler * made by code past this point. 463c1d93b05SSam Leffler */ 464c1d93b05SSam Leffler if ((m->m_flags & M_PKTHDR) == 0) { 465c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o packet header\n"); 466c1d93b05SSam Leffler ifp->if_ierrors++; 467c939f1aeSLuigi Rizzo m_freem(m); 468c939f1aeSLuigi Rizzo return; 469c939f1aeSLuigi Rizzo } 470797f247bSMatthew N. Dodd if (m->m_len < ETHER_HDR_LEN) { 471c1d93b05SSam Leffler /* XXX maybe should pullup? */ 472c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o leading ethernet " 473c1d93b05SSam Leffler "header (len %u pkt len %u)\n", 474c1d93b05SSam Leffler m->m_len, m->m_pkthdr.len); 475c1d93b05SSam Leffler ifp->if_ierrors++; 476c1d93b05SSam Leffler m_freem(m); 477c1d93b05SSam Leffler return; 4782e2de7f2SArchie Cobbs } 479c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 480c1d93b05SSam Leffler etype = ntohs(eh->ether_type); 481c1d93b05SSam Leffler if (m->m_pkthdr.len > 482c1d93b05SSam Leffler ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 483c1d93b05SSam Leffler if_printf(ifp, "discard oversize frame " 484c1d93b05SSam Leffler "(ether type %x flags %x len %u > max %lu)\n", 485c1d93b05SSam Leffler etype, m->m_flags, m->m_pkthdr.len, 486c1d93b05SSam Leffler ETHER_MAX_FRAME(ifp, etype, 487c1d93b05SSam Leffler m->m_flags & M_HASFCS)); 488c1d93b05SSam Leffler ifp->if_ierrors++; 489c1d93b05SSam Leffler m_freem(m); 490c1d93b05SSam Leffler return; 491c1d93b05SSam Leffler } 492c1d93b05SSam Leffler if (m->m_pkthdr.rcvif == NULL) { 493c1d93b05SSam Leffler if_printf(ifp, "discard frame w/o interface pointer\n"); 494c1d93b05SSam Leffler ifp->if_ierrors++; 495c1d93b05SSam Leffler m_freem(m); 496c1d93b05SSam Leffler return; 497c1d93b05SSam Leffler } 498c1d93b05SSam Leffler #ifdef DIAGNOSTIC 499c1d93b05SSam Leffler if (m->m_pkthdr.rcvif != ifp) { 5009bf40edeSBrooks Davis if_printf(ifp, "Warning, frame marked as received on %s\n", 5019bf40edeSBrooks Davis m->m_pkthdr.rcvif->if_xname); 502c1d93b05SSam Leffler } 503c1d93b05SSam Leffler #endif 504c1d93b05SSam Leffler 505533d8562SRobert Watson #ifdef MAC 506533d8562SRobert Watson /* 507533d8562SRobert Watson * Tag the mbuf with an appropriate MAC label before any other 508533d8562SRobert Watson * consumers can get to it. 509533d8562SRobert Watson */ 510533d8562SRobert Watson mac_create_mbuf_from_ifnet(ifp, m); 511533d8562SRobert Watson #endif 512533d8562SRobert Watson 513c1d93b05SSam Leffler /* 514c1d93b05SSam Leffler * Give bpf a chance at the packet. 515c1d93b05SSam Leffler */ 516c1d93b05SSam Leffler BPF_MTAP(ifp, m); 5172e2de7f2SArchie Cobbs 518afbe3a0fSPoul-Henning Kamp if (ifp->if_flags & IFF_MONITOR) { 519c1d93b05SSam Leffler /* 520c1d93b05SSam Leffler * Interface marked for monitoring; discard packet. 521c1d93b05SSam Leffler */ 522afbe3a0fSPoul-Henning Kamp m_freem(m); 523afbe3a0fSPoul-Henning Kamp return; 524afbe3a0fSPoul-Henning Kamp } 525afbe3a0fSPoul-Henning Kamp 526c1d93b05SSam Leffler /* If the CRC is still on the packet, trim it off. */ 527c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 528c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 529c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 530c1d93b05SSam Leffler } 531c1d93b05SSam Leffler 532c1d93b05SSam Leffler ifp->if_ibytes += m->m_pkthdr.len; 53305463bb5SDavid Greenman 534e1e1452dSArchie Cobbs /* Handle ng_ether(4) processing, if any */ 535e1e1452dSArchie Cobbs if (ng_ether_input_p != NULL) { 536c1d93b05SSam Leffler (*ng_ether_input_p)(ifp, &m); 537e1e1452dSArchie Cobbs if (m == NULL) 538e1e1452dSArchie Cobbs return; 539e1e1452dSArchie Cobbs } 540e1e1452dSArchie Cobbs 5412e2de7f2SArchie Cobbs /* Check for bridging mode */ 5427b109fa4SLuigi Rizzo if (BDG_ACTIVE(ifp) ) { 5432e2de7f2SArchie Cobbs struct ifnet *bif; 5442e2de7f2SArchie Cobbs 545c1d93b05SSam Leffler /* 546c1d93b05SSam Leffler * Check with bridging code to see how the packet 547c1d93b05SSam Leffler * should be handled. Possibilities are: 548c1d93b05SSam Leffler * 549c1d93b05SSam Leffler * BDG_BCAST broadcast 550c1d93b05SSam Leffler * BDG_MCAST multicast 551c1d93b05SSam Leffler * BDG_LOCAL for local address, don't forward 552c1d93b05SSam Leffler * BDG_DROP discard 553c1d93b05SSam Leffler * ifp forward only to specified interface(s) 554c1d93b05SSam Leffler * 555c1d93b05SSam Leffler * Non-local destinations are handled by passing the 556c1d93b05SSam Leffler * packet back to the bridge code. 557c1d93b05SSam Leffler */ 558c1d93b05SSam Leffler bif = bridge_in_ptr(ifp, eh); 559c1d93b05SSam Leffler if (bif == BDG_DROP) { /* discard packet */ 5602e2de7f2SArchie Cobbs m_freem(m); 5612e2de7f2SArchie Cobbs return; 5622e2de7f2SArchie Cobbs } 563c1d93b05SSam Leffler if (bif != BDG_LOCAL) { /* non-local, forward */ 564c1d93b05SSam Leffler m = bdg_forward_ptr(m, bif); 565ddacb30fSBosko Milekic /* 566c1d93b05SSam Leffler * The bridge may consume the packet if it's not 567c1d93b05SSam Leffler * supposed to be passed up or if a problem occurred 568c1d93b05SSam Leffler * while doing its job. This is reflected by it 569c1d93b05SSam Leffler * returning a NULL mbuf pointer. 570ddacb30fSBosko Milekic */ 571507b4b54SLuigi Rizzo if (m == NULL) { 572507b4b54SLuigi Rizzo if (bif == BDG_BCAST || bif == BDG_MCAST) 573c1d93b05SSam Leffler if_printf(ifp, 574c1d93b05SSam Leffler "bridge dropped %s packet\n", 575c1d93b05SSam Leffler bif == BDG_BCAST ? "broadcast" : 576c1d93b05SSam Leffler "multicast"); 577ddacb30fSBosko Milekic return; 578ddacb30fSBosko Milekic } 579c1d93b05SSam Leffler /* 580c1d93b05SSam Leffler * But in some cases the bridge may return the 581c1d93b05SSam Leffler * packet for us to free; sigh. 582c1d93b05SSam Leffler */ 583c1d93b05SSam Leffler if (bif != BDG_BCAST && bif != BDG_MCAST) { 5842e2de7f2SArchie Cobbs m_freem(m); 5852e2de7f2SArchie Cobbs return; 5862e2de7f2SArchie Cobbs } 587c1d93b05SSam Leffler } 588c1d93b05SSam Leffler } 5892e2de7f2SArchie Cobbs 590c1d93b05SSam Leffler ether_demux(ifp, m); 591a6ddbff0SPoul-Henning Kamp /* First chunk of an mbuf contains good entropy */ 59210b1fde0SMark Murray if (harvest.ethernet) 59310b1fde0SMark Murray random_harvest(m, 16, 3, 0, RANDOM_NET); 594e1e1452dSArchie Cobbs } 595e1e1452dSArchie Cobbs 596e1e1452dSArchie Cobbs /* 597e1e1452dSArchie Cobbs * Upper layer processing for a received Ethernet packet. 598e1e1452dSArchie Cobbs */ 599e1e1452dSArchie Cobbs void 600c1d93b05SSam Leffler ether_demux(struct ifnet *ifp, struct mbuf *m) 601e1e1452dSArchie Cobbs { 602c1d93b05SSam Leffler struct ether_header *eh; 6031cafed39SJonathan Lemon int isr; 604e1e1452dSArchie Cobbs u_short ether_type; 605e1e1452dSArchie Cobbs #if defined(NETATALK) 606098a8c3bSMatthew N. Dodd struct llc *l; 607e1e1452dSArchie Cobbs #endif 608ac9d7e26SMax Laier struct ip_fw *rule = ip_dn_claim_rule(m); 60936e8826fSMax Laier 610c1d93b05SSam Leffler KASSERT(ifp != NULL, ("ether_demux: NULL interface pointer")); 611c1d93b05SSam Leffler 612c1d93b05SSam Leffler eh = mtod(m, struct ether_header *); 613c1d93b05SSam Leffler 6142b25acc1SLuigi Rizzo if (rule) /* packet was already bridged */ 6152b25acc1SLuigi Rizzo goto post_stats; 6164b984093SLuigi Rizzo 617c6943100SPoul-Henning Kamp if (!(BDG_ACTIVE(ifp))) { 618c6943100SPoul-Henning Kamp /* 619c6943100SPoul-Henning Kamp * Discard packet if upper layers shouldn't see it because it 620c6943100SPoul-Henning Kamp * was unicast to a different Ethernet address. If the driver 621c6943100SPoul-Henning Kamp * is working properly, then this situation can only happen 622c6943100SPoul-Henning Kamp * when the interface is in promiscuous mode. 623c6943100SPoul-Henning Kamp */ 624cb24f323SArchie Cobbs if ((ifp->if_flags & IFF_PROMISC) != 0 625cb24f323SArchie Cobbs && (eh->ether_dhost[0] & 1) == 0 626cb24f323SArchie Cobbs && bcmp(eh->ether_dhost, 627ffb079beSMaxim Sobolev IFP2AC(ifp)->ac_enaddr, ETHER_ADDR_LEN) != 0 62825faf49dSMaxim Sobolev && (ifp->if_flags & IFF_PPROMISC) == 0) { 629cb24f323SArchie Cobbs m_freem(m); 630cb24f323SArchie Cobbs return; 631cb24f323SArchie Cobbs } 632c6943100SPoul-Henning Kamp } 633cb24f323SArchie Cobbs 6342e2de7f2SArchie Cobbs /* Discard packet if interface is not up */ 635df8bae1dSRodney W. Grimes if ((ifp->if_flags & IFF_UP) == 0) { 636df8bae1dSRodney W. Grimes m_freem(m); 637df8bae1dSRodney W. Grimes return; 638df8bae1dSRodney W. Grimes } 639588523faSSam Leffler if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 64064760eb0SWarner Losh if (bcmp(etherbroadcastaddr, eh->ether_dhost, 641df8bae1dSRodney W. Grimes sizeof(etherbroadcastaddr)) == 0) 642df8bae1dSRodney W. Grimes m->m_flags |= M_BCAST; 6432cc2df49SGarrett Wollman else 644df8bae1dSRodney W. Grimes m->m_flags |= M_MCAST; 6452cc2df49SGarrett Wollman } 646df8bae1dSRodney W. Grimes if (m->m_flags & (M_BCAST|M_MCAST)) 647df8bae1dSRodney W. Grimes ifp->if_imcasts++; 648df8bae1dSRodney W. Grimes 6494b984093SLuigi Rizzo post_stats: 6504b984093SLuigi Rizzo if (IPFW_LOADED && ether_ipfw != 0) { 651c1d93b05SSam Leffler if (ether_ipfw_chk(&m, NULL, &rule, 0) == 0) { 6524b984093SLuigi Rizzo if (m) 6534b984093SLuigi Rizzo m_freem(m); 6544b984093SLuigi Rizzo return; 6554b984093SLuigi Rizzo } 6564b984093SLuigi Rizzo } 6574b984093SLuigi Rizzo 658c1d93b05SSam Leffler /* 659c1d93b05SSam Leffler * If VLANs are configured on the interface, check to 660c1d93b05SSam Leffler * see if the device performed the decapsulation and 661c1d93b05SSam Leffler * provided us with the tag. 662c1d93b05SSam Leffler */ 663c1d93b05SSam Leffler if (ifp->if_nvlans && 664c1d93b05SSam Leffler m_tag_locate(m, MTAG_VLAN, MTAG_VLAN_TAG, NULL) != NULL) { 665c1d93b05SSam Leffler /* 666c1d93b05SSam Leffler * vlan_input() will either recursively call ether_input() 667c1d93b05SSam Leffler * or drop the packet. 668c1d93b05SSam Leffler */ 669c1d93b05SSam Leffler KASSERT(vlan_input_p != NULL,("ether_input: VLAN not loaded!")); 670c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 671c1d93b05SSam Leffler return; 672c1d93b05SSam Leffler } 673c1d93b05SSam Leffler 674307d80beSDavid Greenman ether_type = ntohs(eh->ether_type); 675307d80beSDavid Greenman 676c1d93b05SSam Leffler /* 677c1d93b05SSam Leffler * Handle protocols that expect to have the Ethernet header 678c1d93b05SSam Leffler * (and possibly FCS) intact. 679c1d93b05SSam Leffler */ 680c1d93b05SSam Leffler switch (ether_type) { 681c1d93b05SSam Leffler case ETHERTYPE_VLAN: 682c1d93b05SSam Leffler if (ifp->if_nvlans != 0) { 683c1d93b05SSam Leffler KASSERT(vlan_input_p,("ether_input: VLAN not loaded!")); 684c1d93b05SSam Leffler (*vlan_input_p)(ifp, m); 685c1d93b05SSam Leffler } else { 686c1d93b05SSam Leffler ifp->if_noproto++; 687c1d93b05SSam Leffler m_freem(m); 688c1d93b05SSam Leffler } 689c1d93b05SSam Leffler return; 690c1d93b05SSam Leffler } 691c1d93b05SSam Leffler 692c1d93b05SSam Leffler /* Strip off Ethernet header. */ 693797f247bSMatthew N. Dodd m_adj(m, ETHER_HDR_LEN); 694c1d93b05SSam Leffler 695c1d93b05SSam Leffler /* If the CRC is still on the packet, trim it off. */ 696c1d93b05SSam Leffler if (m->m_flags & M_HASFCS) { 697c1d93b05SSam Leffler m_adj(m, -ETHER_CRC_LEN); 698c1d93b05SSam Leffler m->m_flags &= ~M_HASFCS; 699c1d93b05SSam Leffler } 700c1d93b05SSam Leffler 701307d80beSDavid Greenman switch (ether_type) { 702df8bae1dSRodney W. Grimes #ifdef INET 703df8bae1dSRodney W. Grimes case ETHERTYPE_IP: 7049188b4a1SAndre Oppermann if (ip_fastforward(m)) 7051f91d8c5SDavid Greenman return; 7061cafed39SJonathan Lemon isr = NETISR_IP; 707df8bae1dSRodney W. Grimes break; 708df8bae1dSRodney W. Grimes 709df8bae1dSRodney W. Grimes case ETHERTYPE_ARP: 71008aadfbbSJonathan Lemon if (ifp->if_flags & IFF_NOARP) { 71108aadfbbSJonathan Lemon /* Discard packet if ARP is disabled on interface */ 71208aadfbbSJonathan Lemon m_freem(m); 71308aadfbbSJonathan Lemon return; 71408aadfbbSJonathan Lemon } 7151cafed39SJonathan Lemon isr = NETISR_ARP; 716df8bae1dSRodney W. Grimes break; 717df8bae1dSRodney W. Grimes #endif 718cc6a66f2SJulian Elischer #ifdef IPX 719cc6a66f2SJulian Elischer case ETHERTYPE_IPX: 7204f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 7214f93599fSBoris Popov return; 7221cafed39SJonathan Lemon isr = NETISR_IPX; 723cc6a66f2SJulian Elischer break; 724cc6a66f2SJulian Elischer #endif 72582cd038dSYoshinobu Inoue #ifdef INET6 72682cd038dSYoshinobu Inoue case ETHERTYPE_IPV6: 7271cafed39SJonathan Lemon isr = NETISR_IPV6; 72882cd038dSYoshinobu Inoue break; 72982cd038dSYoshinobu Inoue #endif 730655929bfSJulian Elischer #ifdef NETATALK 731655929bfSJulian Elischer case ETHERTYPE_AT: 7321cafed39SJonathan Lemon isr = NETISR_ATALK1; 733655929bfSJulian Elischer break; 734655929bfSJulian Elischer case ETHERTYPE_AARP: 7351cafed39SJonathan Lemon isr = NETISR_AARP; 7361cafed39SJonathan Lemon break; 7378cdfefbdSPeter Wemm #endif /* NETATALK */ 738df8bae1dSRodney W. Grimes default: 7394f93599fSBoris Popov #ifdef IPX 7404f93599fSBoris Popov if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 7414f93599fSBoris Popov return; 7424f93599fSBoris Popov #endif /* IPX */ 743242c5536SPeter Wemm #if defined(NETATALK) 744307d80beSDavid Greenman if (ether_type > ETHERMTU) 745c1d93b05SSam Leffler goto discard; 746df8bae1dSRodney W. Grimes l = mtod(m, struct llc *); 7471cafed39SJonathan Lemon if (l->llc_dsap == LLC_SNAP_LSAP && 7481cafed39SJonathan Lemon l->llc_ssap == LLC_SNAP_LSAP && 7491cafed39SJonathan Lemon l->llc_control == LLC_UI) { 750655929bfSJulian Elischer if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code, 751655929bfSJulian Elischer sizeof(at_org_code)) == 0 && 752655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 753797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 7541cafed39SJonathan Lemon isr = NETISR_ATALK2; 755655929bfSJulian Elischer break; 756655929bfSJulian Elischer } 757655929bfSJulian Elischer if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 758655929bfSJulian Elischer sizeof(aarp_org_code)) == 0 && 759655929bfSJulian Elischer ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 760797f247bSMatthew N. Dodd m_adj(m, LLC_SNAPFRAMELEN); 7611cafed39SJonathan Lemon isr = NETISR_AARP; 762655929bfSJulian Elischer break; 763df8bae1dSRodney W. Grimes } 7641cafed39SJonathan Lemon } 765242c5536SPeter Wemm #endif /* NETATALK */ 7661cafed39SJonathan Lemon goto discard; 767df8bae1dSRodney W. Grimes } 7681cafed39SJonathan Lemon netisr_dispatch(isr, m); 769c1d93b05SSam Leffler return; 7701cafed39SJonathan Lemon 771c1d93b05SSam Leffler discard: 772c1d93b05SSam Leffler /* 773c1d93b05SSam Leffler * Packet is to be discarded. If netgraph is present, 774c1d93b05SSam Leffler * hand the packet to it for last chance processing; 775c1d93b05SSam Leffler * otherwise dispose of it. 776c1d93b05SSam Leffler */ 777c1d93b05SSam Leffler if (ng_ether_input_orphan_p != NULL) { 778c1d93b05SSam Leffler /* 779c1d93b05SSam Leffler * Put back the ethernet header so netgraph has a 780c1d93b05SSam Leffler * consistent view of inbound packets. 781c1d93b05SSam Leffler */ 782797f247bSMatthew N. Dodd M_PREPEND(m, ETHER_HDR_LEN, M_DONTWAIT); 783c1d93b05SSam Leffler (*ng_ether_input_orphan_p)(ifp, m); 784c1d93b05SSam Leffler return; 785c1d93b05SSam Leffler } 786c1d93b05SSam Leffler m_freem(m); 787c1d93b05SSam Leffler } 788c1d93b05SSam Leffler 789c1d93b05SSam Leffler /* 790c1d93b05SSam Leffler * Convert Ethernet address to printable (loggable) representation. 791c1d93b05SSam Leffler * This routine is for compatibility; it's better to just use 792c1d93b05SSam Leffler * 793c1d93b05SSam Leffler * printf("%6D", <pointer to address>, ":"); 794c1d93b05SSam Leffler * 795c1d93b05SSam Leffler * since there's no static buffer involved. 796c1d93b05SSam Leffler */ 797c1d93b05SSam Leffler char * 798c1d93b05SSam Leffler ether_sprintf(const u_char *ap) 799c1d93b05SSam Leffler { 800c1d93b05SSam Leffler static char etherbuf[18]; 801c1d93b05SSam Leffler snprintf(etherbuf, sizeof (etherbuf), "%6D", ap, ":"); 802c1d93b05SSam Leffler return (etherbuf); 803df8bae1dSRodney W. Grimes } 804df8bae1dSRodney W. Grimes 805df8bae1dSRodney W. Grimes /* 806df8bae1dSRodney W. Grimes * Perform common duties while attaching to interface list 807df8bae1dSRodney W. Grimes */ 808df8bae1dSRodney W. Grimes void 809c1d93b05SSam Leffler ether_ifattach(struct ifnet *ifp, const u_int8_t *llc) 810df8bae1dSRodney W. Grimes { 811098a8c3bSMatthew N. Dodd struct ifaddr *ifa; 812098a8c3bSMatthew N. Dodd struct sockaddr_dl *sdl; 813df8bae1dSRodney W. Grimes 814df8bae1dSRodney W. Grimes ifp->if_type = IFT_ETHER; 815c1d93b05SSam Leffler ifp->if_addrlen = ETHER_ADDR_LEN; 816c1d93b05SSam Leffler ifp->if_hdrlen = ETHER_HDR_LEN; 817cfeff1b6SJonathan Lemon if_attach(ifp); 818df8bae1dSRodney W. Grimes ifp->if_mtu = ETHERMTU; 819c1d93b05SSam Leffler ifp->if_output = ether_output; 820c1d93b05SSam Leffler ifp->if_input = ether_input; 8211158dfb7SGarrett Wollman ifp->if_resolvemulti = ether_resolvemulti; 822a330e1f1SGary Palmer if (ifp->if_baudrate == 0) 823c1d93b05SSam Leffler ifp->if_baudrate = IF_Mbps(10); /* just a default */ 824322dcb8dSMax Khon ifp->if_broadcastaddr = etherbroadcastaddr; 825c1d93b05SSam Leffler 826f9132cebSJonathan Lemon ifa = ifaddr_byindex(ifp->if_index); 8276e551fb6SDavid E. O'Brien KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 82859562606SGarrett Wollman sdl = (struct sockaddr_dl *)ifa->ifa_addr; 829df8bae1dSRodney W. Grimes sdl->sdl_type = IFT_ETHER; 830df8bae1dSRodney W. Grimes sdl->sdl_alen = ifp->if_addrlen; 831c1d93b05SSam Leffler bcopy(llc, LLADDR(sdl), ifp->if_addrlen); 832c1d93b05SSam Leffler /* 833c1d93b05SSam Leffler * XXX: This doesn't belong here; we do it until 834c1d93b05SSam Leffler * XXX: all drivers are cleaned up 835c1d93b05SSam Leffler */ 836c1d93b05SSam Leffler if (llc != IFP2AC(ifp)->ac_enaddr) 837c1d93b05SSam Leffler bcopy(llc, IFP2AC(ifp)->ac_enaddr, ifp->if_addrlen); 838c1d93b05SSam Leffler 839797f247bSMatthew N. Dodd bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN); 840e1e1452dSArchie Cobbs if (ng_ether_attach_p != NULL) 841e1e1452dSArchie Cobbs (*ng_ether_attach_p)(ifp); 8427b109fa4SLuigi Rizzo if (BDG_LOADED) 843db69a05dSPaul Saab bdgtakeifaces_ptr(); 844e1e1452dSArchie Cobbs } 845e1e1452dSArchie Cobbs 84621b8ebd9SArchie Cobbs /* 84721b8ebd9SArchie Cobbs * Perform common duties while detaching an Ethernet interface 84821b8ebd9SArchie Cobbs */ 84921b8ebd9SArchie Cobbs void 850c1d93b05SSam Leffler ether_ifdetach(struct ifnet *ifp) 85121b8ebd9SArchie Cobbs { 85221b8ebd9SArchie Cobbs if (ng_ether_detach_p != NULL) 85321b8ebd9SArchie Cobbs (*ng_ether_detach_p)(ifp); 85421b8ebd9SArchie Cobbs bpfdetach(ifp); 85521b8ebd9SArchie Cobbs if_detach(ifp); 8567b109fa4SLuigi Rizzo if (BDG_LOADED) 857db69a05dSPaul Saab bdgtakeifaces_ptr(); 85821b8ebd9SArchie Cobbs } 85921b8ebd9SArchie Cobbs 860ce02431fSDoug Rabson SYSCTL_DECL(_net_link); 861602d513cSGarrett Wollman SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 8624b984093SLuigi Rizzo SYSCTL_INT(_net_link_ether, OID_AUTO, ipfw, CTLFLAG_RW, 8634b984093SLuigi Rizzo ðer_ipfw,0,"Pass ether pkts through firewall"); 86430106f6aSPoul-Henning Kamp 865fb583156SDavid Greenman int 86672fd1b6aSDag-Erling Smørgrav ether_ioctl(struct ifnet *ifp, int command, caddr_t data) 86730106f6aSPoul-Henning Kamp { 86830106f6aSPoul-Henning Kamp struct ifaddr *ifa = (struct ifaddr *) data; 86930106f6aSPoul-Henning Kamp struct ifreq *ifr = (struct ifreq *) data; 870fb583156SDavid Greenman int error = 0; 87130106f6aSPoul-Henning Kamp 87230106f6aSPoul-Henning Kamp switch (command) { 87330106f6aSPoul-Henning Kamp case SIOCSIFADDR: 87430106f6aSPoul-Henning Kamp ifp->if_flags |= IFF_UP; 87530106f6aSPoul-Henning Kamp 87630106f6aSPoul-Henning Kamp switch (ifa->ifa_addr->sa_family) { 87730106f6aSPoul-Henning Kamp #ifdef INET 87830106f6aSPoul-Henning Kamp case AF_INET: 87930106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); /* before arpwhohas */ 880322dcb8dSMax Khon arp_ifinit(ifp, ifa); 88130106f6aSPoul-Henning Kamp break; 88230106f6aSPoul-Henning Kamp #endif 88330106f6aSPoul-Henning Kamp #ifdef IPX 88430106f6aSPoul-Henning Kamp /* 88530106f6aSPoul-Henning Kamp * XXX - This code is probably wrong 88630106f6aSPoul-Henning Kamp */ 88730106f6aSPoul-Henning Kamp case AF_IPX: 88830106f6aSPoul-Henning Kamp { 889098a8c3bSMatthew N. Dodd struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 8904c8e8c05SJulian Elischer struct arpcom *ac = IFP2AC(ifp); 89130106f6aSPoul-Henning Kamp 89230106f6aSPoul-Henning Kamp if (ipx_nullhost(*ina)) 89330106f6aSPoul-Henning Kamp ina->x_host = 89486101139SPoul-Henning Kamp *(union ipx_host *) 89586101139SPoul-Henning Kamp ac->ac_enaddr; 89630106f6aSPoul-Henning Kamp else { 89730106f6aSPoul-Henning Kamp bcopy((caddr_t) ina->x_host.c_host, 89886101139SPoul-Henning Kamp (caddr_t) ac->ac_enaddr, 89986101139SPoul-Henning Kamp sizeof(ac->ac_enaddr)); 90030106f6aSPoul-Henning Kamp } 90130106f6aSPoul-Henning Kamp 90230106f6aSPoul-Henning Kamp /* 90330106f6aSPoul-Henning Kamp * Set new address 90430106f6aSPoul-Henning Kamp */ 90530106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 90630106f6aSPoul-Henning Kamp break; 90730106f6aSPoul-Henning Kamp } 90830106f6aSPoul-Henning Kamp #endif 90930106f6aSPoul-Henning Kamp default: 91030106f6aSPoul-Henning Kamp ifp->if_init(ifp->if_softc); 91130106f6aSPoul-Henning Kamp break; 91230106f6aSPoul-Henning Kamp } 91330106f6aSPoul-Henning Kamp break; 91430106f6aSPoul-Henning Kamp 91530106f6aSPoul-Henning Kamp case SIOCGIFADDR: 91630106f6aSPoul-Henning Kamp { 91730106f6aSPoul-Henning Kamp struct sockaddr *sa; 91830106f6aSPoul-Henning Kamp 91930106f6aSPoul-Henning Kamp sa = (struct sockaddr *) & ifr->ifr_data; 9204c8e8c05SJulian Elischer bcopy(IFP2AC(ifp)->ac_enaddr, 92130106f6aSPoul-Henning Kamp (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 92230106f6aSPoul-Henning Kamp } 92330106f6aSPoul-Henning Kamp break; 924fb583156SDavid Greenman 925fb583156SDavid Greenman case SIOCSIFMTU: 926fb583156SDavid Greenman /* 927fb583156SDavid Greenman * Set the interface MTU. 928fb583156SDavid Greenman */ 929fb583156SDavid Greenman if (ifr->ifr_mtu > ETHERMTU) { 930fb583156SDavid Greenman error = EINVAL; 931fb583156SDavid Greenman } else { 932fb583156SDavid Greenman ifp->if_mtu = ifr->ifr_mtu; 93330106f6aSPoul-Henning Kamp } 934fb583156SDavid Greenman break; 935c1d93b05SSam Leffler default: 936c1d93b05SSam Leffler error = EINVAL; /* XXX netbsd has ENOTTY??? */ 937c1d93b05SSam Leffler break; 938fb583156SDavid Greenman } 939fb583156SDavid Greenman return (error); 94030106f6aSPoul-Henning Kamp } 9411158dfb7SGarrett Wollman 94237c84183SPoul-Henning Kamp static int 94372fd1b6aSDag-Erling Smørgrav ether_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 94472fd1b6aSDag-Erling Smørgrav struct sockaddr *sa) 9451158dfb7SGarrett Wollman { 9461158dfb7SGarrett Wollman struct sockaddr_dl *sdl; 9471158dfb7SGarrett Wollman struct sockaddr_in *sin; 94882cd038dSYoshinobu Inoue #ifdef INET6 94982cd038dSYoshinobu Inoue struct sockaddr_in6 *sin6; 95082cd038dSYoshinobu Inoue #endif 9511158dfb7SGarrett Wollman u_char *e_addr; 9521158dfb7SGarrett Wollman 9531158dfb7SGarrett Wollman switch(sa->sa_family) { 9541158dfb7SGarrett Wollman case AF_LINK: 9557f33a738SJulian Elischer /* 9567f33a738SJulian Elischer * No mapping needed. Just check that it's a valid MC address. 9577f33a738SJulian Elischer */ 9581158dfb7SGarrett Wollman sdl = (struct sockaddr_dl *)sa; 9591158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 9601158dfb7SGarrett Wollman if ((e_addr[0] & 1) != 1) 9611158dfb7SGarrett Wollman return EADDRNOTAVAIL; 9621158dfb7SGarrett Wollman *llsa = 0; 9631158dfb7SGarrett Wollman return 0; 9641158dfb7SGarrett Wollman 9651158dfb7SGarrett Wollman #ifdef INET 9661158dfb7SGarrett Wollman case AF_INET: 9671158dfb7SGarrett Wollman sin = (struct sockaddr_in *)sa; 9681158dfb7SGarrett Wollman if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 9691158dfb7SGarrett Wollman return EADDRNOTAVAIL; 9701158dfb7SGarrett Wollman MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 971a163d034SWarner Losh M_WAITOK|M_ZERO); 9721158dfb7SGarrett Wollman sdl->sdl_len = sizeof *sdl; 9731158dfb7SGarrett Wollman sdl->sdl_family = AF_LINK; 9741158dfb7SGarrett Wollman sdl->sdl_index = ifp->if_index; 9751158dfb7SGarrett Wollman sdl->sdl_type = IFT_ETHER; 9761158dfb7SGarrett Wollman sdl->sdl_alen = ETHER_ADDR_LEN; 9771158dfb7SGarrett Wollman e_addr = LLADDR(sdl); 9781158dfb7SGarrett Wollman ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 9791158dfb7SGarrett Wollman *llsa = (struct sockaddr *)sdl; 9801158dfb7SGarrett Wollman return 0; 9811158dfb7SGarrett Wollman #endif 98282cd038dSYoshinobu Inoue #ifdef INET6 98382cd038dSYoshinobu Inoue case AF_INET6: 98482cd038dSYoshinobu Inoue sin6 = (struct sockaddr_in6 *)sa; 985595b8a1cSJun-ichiro itojun Hagino if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 986595b8a1cSJun-ichiro itojun Hagino /* 987595b8a1cSJun-ichiro itojun Hagino * An IP6 address of 0 means listen to all 988595b8a1cSJun-ichiro itojun Hagino * of the Ethernet multicast address used for IP6. 989595b8a1cSJun-ichiro itojun Hagino * (This is used for multicast routers.) 990595b8a1cSJun-ichiro itojun Hagino */ 991595b8a1cSJun-ichiro itojun Hagino ifp->if_flags |= IFF_ALLMULTI; 992595b8a1cSJun-ichiro itojun Hagino *llsa = 0; 993595b8a1cSJun-ichiro itojun Hagino return 0; 994595b8a1cSJun-ichiro itojun Hagino } 99582cd038dSYoshinobu Inoue if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 99682cd038dSYoshinobu Inoue return EADDRNOTAVAIL; 99782cd038dSYoshinobu Inoue MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 998a163d034SWarner Losh M_WAITOK|M_ZERO); 99982cd038dSYoshinobu Inoue sdl->sdl_len = sizeof *sdl; 100082cd038dSYoshinobu Inoue sdl->sdl_family = AF_LINK; 100182cd038dSYoshinobu Inoue sdl->sdl_index = ifp->if_index; 100282cd038dSYoshinobu Inoue sdl->sdl_type = IFT_ETHER; 100382cd038dSYoshinobu Inoue sdl->sdl_alen = ETHER_ADDR_LEN; 100482cd038dSYoshinobu Inoue e_addr = LLADDR(sdl); 100582cd038dSYoshinobu Inoue ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 100682cd038dSYoshinobu Inoue *llsa = (struct sockaddr *)sdl; 100782cd038dSYoshinobu Inoue return 0; 100882cd038dSYoshinobu Inoue #endif 10091158dfb7SGarrett Wollman 10101158dfb7SGarrett Wollman default: 10111158dfb7SGarrett Wollman /* 10121158dfb7SGarrett Wollman * Well, the text isn't quite right, but it's the name 10131158dfb7SGarrett Wollman * that counts... 10141158dfb7SGarrett Wollman */ 10151158dfb7SGarrett Wollman return EAFNOSUPPORT; 10161158dfb7SGarrett Wollman } 10171158dfb7SGarrett Wollman } 101840811c14SMatthew N. Dodd 101940811c14SMatthew N. Dodd static moduledata_t ether_mod = { 102040811c14SMatthew N. Dodd "ether", 102140811c14SMatthew N. Dodd NULL, 102240811c14SMatthew N. Dodd 0 102340811c14SMatthew N. Dodd }; 102440811c14SMatthew N. Dodd 102540811c14SMatthew N. Dodd DECLARE_MODULE(ether, ether_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 102640811c14SMatthew N. Dodd MODULE_VERSION(ether, 1); 1027