1309 lines
32 KiB
C
1309 lines
32 KiB
C
/*
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* Copyright (c) 1982, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#include "opt_atalk.h"
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_ipx.h"
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#include "opt_bdg.h"
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#include "opt_netgraph.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/netisr.h>
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#include <net/route.h>
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#include <net/if_llc.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#if defined(INET) || defined(INET6)
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/if_ether.h>
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#endif
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#ifdef INET6
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#include <netinet6/nd6.h>
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#include <netinet6/in6_ifattach.h>
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#endif
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#ifdef IPX
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#include <netipx/ipx.h>
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#include <netipx/ipx_if.h>
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int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m);
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int (*ef_outputp)(struct ifnet *ifp, struct mbuf *m,
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struct sockaddr *dst, short *tp);
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#endif
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#ifdef NS
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#include <netns/ns.h>
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#include <netns/ns_if.h>
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ushort ns_nettype;
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int ether_outputdebug = 0;
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int ether_inputdebug = 0;
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#endif
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#ifdef ISO
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#include <netiso/argo_debug.h>
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#include <netiso/iso.h>
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#include <netiso/iso_var.h>
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#include <netiso/iso_snpac.h>
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#endif
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/*#ifdef LLC
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#include <netccitt/dll.h>
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#include <netccitt/llc_var.h>
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#endif*/
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#if defined(LLC) && defined(CCITT)
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extern struct ifqueue pkintrq;
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#endif
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#ifdef NETATALK
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#include <netatalk/at.h>
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#include <netatalk/at_var.h>
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#include <netatalk/at_extern.h>
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#define llc_snap_org_code llc_un.type_snap.org_code
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#define llc_snap_ether_type llc_un.type_snap.ether_type
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extern u_char at_org_code[3];
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extern u_char aarp_org_code[3];
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#endif /* NETATALK */
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#ifdef BRIDGE
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#include <net/bridge.h>
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#endif
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#include "vlan.h"
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#if NVLAN > 0
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#include <net/if_vlan_var.h>
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#endif /* NVLAN > 0 */
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static int ether_resolvemulti __P((struct ifnet *, struct sockaddr **,
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struct sockaddr *));
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u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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#define senderr(e) do { error = (e); goto bad;} while (0)
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#define IFP2AC(IFP) ((struct arpcom *)IFP)
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#ifdef NETGRAPH
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#include <netgraph/ng_ether.h>
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#include <netgraph/ng_message.h>
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#include <netgraph/netgraph.h>
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static void ngether_init(void* ignored);
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static void ngether_send(struct arpcom *ac,
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struct ether_header *eh, struct mbuf *m);
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static ng_constructor_t ngether_constructor;
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static ng_rcvmsg_t ngether_rcvmsg;
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static ng_shutdown_t ngether_rmnode;
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static ng_newhook_t ngether_newhook;
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static ng_connect_t ngether_connect;
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static ng_rcvdata_t ngether_rcvdata;
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static ng_disconnect_t ngether_disconnect;
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static struct ng_type typestruct = {
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NG_VERSION,
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NG_ETHER_NODE_TYPE,
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NULL,
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ngether_constructor,
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ngether_rcvmsg,
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ngether_rmnode,
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ngether_newhook,
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NULL,
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ngether_connect,
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ngether_rcvdata,
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ngether_rcvdata,
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ngether_disconnect,
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NULL
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};
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#define AC2NG(AC) ((node_p)((AC)->ac_ng))
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#define NGEF_DIVERT NGF_TYPE1 /* all packets sent to netgraph */
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#endif /* NETGRAPH */
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/*
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* Ethernet output routine.
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* Encapsulate a packet of type family for the local net.
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* Use trailer local net encapsulation if enough data in first
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* packet leaves a multiple of 512 bytes of data in remainder.
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* Assumes that ifp is actually pointer to arpcom structure.
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*/
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int
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ether_output(ifp, m, dst, rt0)
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register struct ifnet *ifp;
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struct mbuf *m;
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struct sockaddr *dst;
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struct rtentry *rt0;
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{
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short type;
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int s, error = 0, hdrcmplt = 0;
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u_char esrc[6], edst[6];
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register struct rtentry *rt;
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register struct ether_header *eh;
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int off, len = m->m_pkthdr.len, loop_copy = 0;
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int hlen; /* link layer header lenght */
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struct arpcom *ac = IFP2AC(ifp);
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if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
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senderr(ENETDOWN);
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rt = rt0;
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if (rt) {
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if ((rt->rt_flags & RTF_UP) == 0) {
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rt0 = rt = rtalloc1(dst, 1, 0UL);
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if (rt0)
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rt->rt_refcnt--;
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else
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senderr(EHOSTUNREACH);
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}
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if (rt->rt_flags & RTF_GATEWAY) {
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if (rt->rt_gwroute == 0)
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goto lookup;
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if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
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rtfree(rt); rt = rt0;
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lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1,
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0UL);
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if ((rt = rt->rt_gwroute) == 0)
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senderr(EHOSTUNREACH);
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}
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}
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if (rt->rt_flags & RTF_REJECT)
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if (rt->rt_rmx.rmx_expire == 0 ||
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time_second < rt->rt_rmx.rmx_expire)
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senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
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}
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hlen = ETHER_HDR_LEN;
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switch (dst->sa_family) {
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#ifdef INET
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case AF_INET:
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if (!arpresolve(ac, rt, m, dst, edst, rt0))
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return (0); /* if not yet resolved */
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off = m->m_pkthdr.len - m->m_len;
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type = htons(ETHERTYPE_IP);
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break;
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#endif
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#ifdef INET6
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case AF_INET6:
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if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, (u_char *)edst)) {
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/* this must be impossible, so we bark */
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printf("nd6_storelladdr failed\n");
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return(0);
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}
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off = m->m_pkthdr.len - m->m_len;
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type = htons(ETHERTYPE_IPV6);
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break;
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#endif
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#ifdef IPX
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case AF_IPX:
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if (ef_outputp) {
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error = ef_outputp(ifp, m, dst, &type);
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if (error < 0)
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senderr(EPFNOSUPPORT);
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if (error > 0)
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type = htons(ETHERTYPE_IPX);
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} else
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type = htons(ETHERTYPE_IPX);
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bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
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(caddr_t)edst, sizeof (edst));
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break;
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#endif
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#ifdef NETATALK
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case AF_APPLETALK:
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{
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struct at_ifaddr *aa;
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if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) {
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goto bad;
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}
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if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst))
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return (0);
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/*
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* In the phase 2 case, need to prepend an mbuf for the llc header.
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* Since we must preserve the value of m, which is passed to us by
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* value, we m_copy() the first mbuf, and use it for our llc header.
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*/
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if ( aa->aa_flags & AFA_PHASE2 ) {
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struct llc llc;
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M_PREPEND(m, sizeof(struct llc), M_WAIT);
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len += sizeof(struct llc);
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llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
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llc.llc_control = LLC_UI;
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bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code));
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llc.llc_snap_ether_type = htons( ETHERTYPE_AT );
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bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc));
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type = htons(m->m_pkthdr.len);
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hlen = sizeof(struct llc) + ETHER_HDR_LEN;
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} else {
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type = htons(ETHERTYPE_AT);
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}
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break;
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}
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#endif NETATALK
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#ifdef NS
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case AF_NS:
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switch(ns_nettype){
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default:
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case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
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type = 0x8137;
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break;
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case 0x0: /* Novell 802.3 */
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type = htons( m->m_pkthdr.len);
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break;
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case 0xe0e0: /* Novell 802.2 and Token-Ring */
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M_PREPEND(m, 3, M_WAIT);
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type = htons( m->m_pkthdr.len);
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cp = mtod(m, u_char *);
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*cp++ = 0xE0;
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*cp++ = 0xE0;
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*cp++ = 0x03;
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break;
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}
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bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host),
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(caddr_t)edst, sizeof (edst));
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/*
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* XXX if ns_thishost is the same as the node's ethernet
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* address then just the default code will catch this anyhow.
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* So I'm not sure if this next clause should be here at all?
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* [JRE]
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*/
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if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))){
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m->m_pkthdr.rcvif = ifp;
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schednetisr(NETISR_NS);
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inq = &nsintrq;
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s = splimp();
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if (IF_QFULL(inq)) {
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IF_DROP(inq);
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m_freem(m);
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} else
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IF_ENQUEUE(inq, m);
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splx(s);
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return (error);
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}
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if (!bcmp((caddr_t)edst, (caddr_t)&ns_broadhost, sizeof(edst))){
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m->m_flags |= M_BCAST;
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}
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break;
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#endif /* NS */
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#ifdef ISO
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case AF_ISO: {
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int snpalen;
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struct llc *l;
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register struct sockaddr_dl *sdl;
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if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) &&
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sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) {
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bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst));
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} else if (error =
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iso_snparesolve(ifp, (struct sockaddr_iso *)dst,
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(char *)edst, &snpalen))
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goto bad; /* Not Resolved */
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/* If broadcasting on a simplex interface, loopback a copy */
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if (*edst & 1)
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m->m_flags |= (M_BCAST|M_MCAST);
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M_PREPEND(m, 3, M_DONTWAIT);
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if (m == NULL)
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return (0);
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type = htons(m->m_pkthdr.len);
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l = mtod(m, struct llc *);
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l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP;
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l->llc_control = LLC_UI;
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len += 3;
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IFDEBUG(D_ETHER)
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int i;
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printf("unoutput: sending pkt to: ");
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for (i=0; i<6; i++)
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printf("%x ", edst[i] & 0xff);
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printf("\n");
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ENDDEBUG
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} break;
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#endif /* ISO */
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#ifdef LLC
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/* case AF_NSAP: */
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case AF_CCITT: {
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register struct sockaddr_dl *sdl =
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(struct sockaddr_dl *) rt -> rt_gateway;
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if (sdl && sdl->sdl_family == AF_LINK
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&& sdl->sdl_alen > 0) {
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bcopy(LLADDR(sdl), (char *)edst, sizeof(edst));
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} else goto bad; /* Not a link interface ? Funny ... */
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if (*edst & 1)
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loop_copy = 1;
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type = htons(m->m_pkthdr.len);
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#ifdef LLC_DEBUG
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{
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int i;
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register struct llc *l = mtod(m, struct llc *);
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printf("ether_output: sending LLC2 pkt to: ");
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for (i=0; i<6; i++)
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printf("%x ", edst[i] & 0xff);
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printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n",
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type & 0xff, l->llc_dsap & 0xff, l->llc_ssap &0xff,
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l->llc_control & 0xff);
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}
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#endif /* LLC_DEBUG */
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} break;
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#endif /* LLC */
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case pseudo_AF_HDRCMPLT:
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hdrcmplt = 1;
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eh = (struct ether_header *)dst->sa_data;
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(void)memcpy(esrc, eh->ether_shost, sizeof (esrc));
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/* FALLTHROUGH */
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case AF_UNSPEC:
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loop_copy = -1; /* if this is for us, don't do it */
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eh = (struct ether_header *)dst->sa_data;
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(void)memcpy(edst, eh->ether_dhost, sizeof (edst));
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type = eh->ether_type;
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break;
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default:
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printf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit,
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dst->sa_family);
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senderr(EAFNOSUPPORT);
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}
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|
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/*
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* Add local net header. If no space in first mbuf,
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* allocate another.
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*/
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M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT);
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if (m == 0)
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senderr(ENOBUFS);
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eh = mtod(m, struct ether_header *);
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(void)memcpy(&eh->ether_type, &type,
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sizeof(eh->ether_type));
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(void)memcpy(eh->ether_dhost, edst, sizeof (edst));
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if (hdrcmplt)
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(void)memcpy(eh->ether_shost, esrc,
|
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sizeof(eh->ether_shost));
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else
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(void)memcpy(eh->ether_shost, ac->ac_enaddr,
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sizeof(eh->ether_shost));
|
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|
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/*
|
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* If a simplex interface, and the packet is being sent to our
|
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* Ethernet address or a broadcast address, loopback a copy.
|
|
* XXX To make a simplex device behave exactly like a duplex
|
|
* device, we should copy in the case of sending to our own
|
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* ethernet address (thus letting the original actually appear
|
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* on the wire). However, we don't do that here for security
|
|
* reasons and compatibility with the original behavior.
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|
*/
|
|
if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
|
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if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
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struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
|
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|
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(void) if_simloop(ifp, n, dst, hlen);
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} else if (bcmp(eh->ether_dhost,
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eh->ether_shost, ETHER_ADDR_LEN) == 0) {
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(void) if_simloop(ifp, m, dst, hlen);
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return (0); /* XXX */
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}
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}
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#ifdef BRIDGE
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|
if (do_bridge) {
|
|
struct mbuf *m0 = m ;
|
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|
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if (m->m_pkthdr.rcvif)
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m->m_pkthdr.rcvif = NULL ;
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ifp = bridge_dst_lookup(m);
|
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bdg_forward(&m0, ifp);
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if (m0)
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m_freem(m0);
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return (0);
|
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}
|
|
#endif
|
|
s = splimp();
|
|
/*
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|
* Queue message on interface, and start output if interface
|
|
* not yet active.
|
|
*/
|
|
if (IF_QFULL(&ifp->if_snd)) {
|
|
IF_DROP(&ifp->if_snd);
|
|
splx(s);
|
|
senderr(ENOBUFS);
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|
}
|
|
IF_ENQUEUE(&ifp->if_snd, m);
|
|
if ((ifp->if_flags & IFF_OACTIVE) == 0)
|
|
(*ifp->if_start)(ifp);
|
|
splx(s);
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|
ifp->if_obytes += len + sizeof (struct ether_header);
|
|
if (m->m_flags & M_MCAST)
|
|
ifp->if_omcasts++;
|
|
return (error);
|
|
|
|
bad:
|
|
if (m)
|
|
m_freem(m);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Process a received Ethernet packet;
|
|
* the packet is in the mbuf chain m without
|
|
* the ether header, which is provided separately.
|
|
*/
|
|
void
|
|
ether_input(ifp, eh, m)
|
|
struct ifnet *ifp;
|
|
register struct ether_header *eh;
|
|
struct mbuf *m;
|
|
{
|
|
register struct ifqueue *inq;
|
|
u_short ether_type;
|
|
int s;
|
|
#if defined (ISO) || defined (LLC) || defined(NETATALK)
|
|
register struct llc *l;
|
|
#endif
|
|
|
|
if ((ifp->if_flags & IFF_UP) == 0) {
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
ifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
|
|
if (eh->ether_dhost[0] & 1) {
|
|
if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost,
|
|
sizeof(etherbroadcastaddr)) == 0)
|
|
m->m_flags |= M_BCAST;
|
|
else
|
|
m->m_flags |= M_MCAST;
|
|
}
|
|
if (m->m_flags & (M_BCAST|M_MCAST))
|
|
ifp->if_imcasts++;
|
|
|
|
ether_type = ntohs(eh->ether_type);
|
|
|
|
#ifdef NETGRAPH
|
|
{
|
|
struct arpcom *ac = IFP2AC(ifp);
|
|
if (AC2NG(ac) && (AC2NG(ac)->flags & NGEF_DIVERT)) {
|
|
ngether_send(ac, eh, m);
|
|
return;
|
|
}
|
|
}
|
|
#endif /* NETGRAPH */
|
|
|
|
#if NVLAN > 0
|
|
if (ether_type == vlan_proto) {
|
|
if (vlan_input(eh, m) < 0)
|
|
ifp->if_data.ifi_noproto++;
|
|
return;
|
|
}
|
|
#endif /* NVLAN > 0 */
|
|
|
|
switch (ether_type) {
|
|
#ifdef INET
|
|
case ETHERTYPE_IP:
|
|
if (ipflow_fastforward(m))
|
|
return;
|
|
schednetisr(NETISR_IP);
|
|
inq = &ipintrq;
|
|
break;
|
|
|
|
case ETHERTYPE_ARP:
|
|
schednetisr(NETISR_ARP);
|
|
inq = &arpintrq;
|
|
break;
|
|
#endif
|
|
#ifdef IPX
|
|
case ETHERTYPE_IPX:
|
|
if (ef_inputp && ef_inputp(ifp, eh, m) == 0)
|
|
return;
|
|
schednetisr(NETISR_IPX);
|
|
inq = &ipxintrq;
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case ETHERTYPE_IPV6:
|
|
schednetisr(NETISR_IPV6);
|
|
inq = &ip6intrq;
|
|
break;
|
|
#endif
|
|
#ifdef NS
|
|
case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */
|
|
schednetisr(NETISR_NS);
|
|
inq = &nsintrq;
|
|
break;
|
|
|
|
#endif /* NS */
|
|
#ifdef NETATALK
|
|
case ETHERTYPE_AT:
|
|
schednetisr(NETISR_ATALK);
|
|
inq = &atintrq1;
|
|
break;
|
|
case ETHERTYPE_AARP:
|
|
/* probably this should be done with a NETISR as well */
|
|
aarpinput(IFP2AC(ifp), m); /* XXX */
|
|
return;
|
|
#endif NETATALK
|
|
default:
|
|
#ifdef IPX
|
|
if (ef_inputp && ef_inputp(ifp, eh, m) == 0)
|
|
return;
|
|
#endif /* IPX */
|
|
#ifdef NS
|
|
checksum = mtod(m, ushort *);
|
|
/* Novell 802.3 */
|
|
if ((ether_type <= ETHERMTU) &&
|
|
((*checksum == 0xffff) || (*checksum == 0xE0E0))){
|
|
if(*checksum == 0xE0E0) {
|
|
m->m_pkthdr.len -= 3;
|
|
m->m_len -= 3;
|
|
m->m_data += 3;
|
|
}
|
|
schednetisr(NETISR_NS);
|
|
inq = &nsintrq;
|
|
break;
|
|
}
|
|
#endif /* NS */
|
|
#if defined (ISO) || defined (LLC) || defined(NETATALK)
|
|
if (ether_type > ETHERMTU)
|
|
goto dropanyway;
|
|
l = mtod(m, struct llc *);
|
|
switch (l->llc_dsap) {
|
|
#ifdef NETATALK
|
|
case LLC_SNAP_LSAP:
|
|
switch (l->llc_control) {
|
|
case LLC_UI:
|
|
if (l->llc_ssap != LLC_SNAP_LSAP)
|
|
goto dropanyway;
|
|
|
|
if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code,
|
|
sizeof(at_org_code)) == 0 &&
|
|
ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) {
|
|
inq = &atintrq2;
|
|
m_adj( m, sizeof( struct llc ));
|
|
schednetisr(NETISR_ATALK);
|
|
break;
|
|
}
|
|
|
|
if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code,
|
|
sizeof(aarp_org_code)) == 0 &&
|
|
ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) {
|
|
m_adj( m, sizeof( struct llc ));
|
|
aarpinput(IFP2AC(ifp), m); /* XXX */
|
|
return;
|
|
}
|
|
|
|
default:
|
|
goto dropanyway;
|
|
}
|
|
break;
|
|
#endif NETATALK
|
|
#ifdef ISO
|
|
case LLC_ISO_LSAP:
|
|
switch (l->llc_control) {
|
|
case LLC_UI:
|
|
/* LLC_UI_P forbidden in class 1 service */
|
|
if ((l->llc_dsap == LLC_ISO_LSAP) &&
|
|
(l->llc_ssap == LLC_ISO_LSAP)) {
|
|
/* LSAP for ISO */
|
|
if (m->m_pkthdr.len > ether_type)
|
|
m_adj(m, ether_type - m->m_pkthdr.len);
|
|
m->m_data += 3; /* XXX */
|
|
m->m_len -= 3; /* XXX */
|
|
m->m_pkthdr.len -= 3; /* XXX */
|
|
M_PREPEND(m, sizeof *eh, M_DONTWAIT);
|
|
if (m == 0)
|
|
return;
|
|
*mtod(m, struct ether_header *) = *eh;
|
|
IFDEBUG(D_ETHER)
|
|
printf("clnp packet");
|
|
ENDDEBUG
|
|
schednetisr(NETISR_ISO);
|
|
inq = &clnlintrq;
|
|
break;
|
|
}
|
|
goto dropanyway;
|
|
|
|
case LLC_XID:
|
|
case LLC_XID_P:
|
|
if(m->m_len < 6)
|
|
goto dropanyway;
|
|
l->llc_window = 0;
|
|
l->llc_fid = 9;
|
|
l->llc_class = 1;
|
|
l->llc_dsap = l->llc_ssap = 0;
|
|
/* Fall through to */
|
|
case LLC_TEST:
|
|
case LLC_TEST_P:
|
|
{
|
|
struct sockaddr sa;
|
|
register struct ether_header *eh2;
|
|
int i;
|
|
u_char c = l->llc_dsap;
|
|
|
|
l->llc_dsap = l->llc_ssap;
|
|
l->llc_ssap = c;
|
|
if (m->m_flags & (M_BCAST | M_MCAST))
|
|
bcopy((caddr_t)ac->ac_enaddr,
|
|
(caddr_t)eh->ether_dhost, 6);
|
|
sa.sa_family = AF_UNSPEC;
|
|
sa.sa_len = sizeof(sa);
|
|
eh2 = (struct ether_header *)sa.sa_data;
|
|
for (i = 0; i < 6; i++) {
|
|
eh2->ether_shost[i] = c = eh->ether_dhost[i];
|
|
eh2->ether_dhost[i] =
|
|
eh->ether_dhost[i] = eh->ether_shost[i];
|
|
eh->ether_shost[i] = c;
|
|
}
|
|
ifp->if_output(ifp, m, &sa, NULL);
|
|
return;
|
|
}
|
|
default:
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
break;
|
|
#endif /* ISO */
|
|
#ifdef LLC
|
|
case LLC_X25_LSAP:
|
|
{
|
|
if (m->m_pkthdr.len > ether_type)
|
|
m_adj(m, ether_type - m->m_pkthdr.len);
|
|
M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT);
|
|
if (m == 0)
|
|
return;
|
|
if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP,
|
|
eh->ether_dhost, LLC_X25_LSAP, 6,
|
|
mtod(m, struct sdl_hdr *)))
|
|
panic("ETHER cons addr failure");
|
|
mtod(m, struct sdl_hdr *)->sdlhdr_len = ether_type;
|
|
#ifdef LLC_DEBUG
|
|
printf("llc packet\n");
|
|
#endif /* LLC_DEBUG */
|
|
schednetisr(NETISR_CCITT);
|
|
inq = &llcintrq;
|
|
break;
|
|
}
|
|
#endif /* LLC */
|
|
dropanyway:
|
|
default:
|
|
#ifdef NETGRAPH
|
|
ngether_send(IFP2AC(ifp), eh, m);
|
|
#else /* NETGRAPH */
|
|
m_freem(m);
|
|
#endif /* NETGRAPH */
|
|
return;
|
|
}
|
|
#else /* ISO || LLC || NETATALK */
|
|
#ifdef NETGRAPH
|
|
ngether_send(IFP2AC(ifp), eh, m);
|
|
#else /* NETGRAPH */
|
|
m_freem(m);
|
|
#endif /* NETGRAPH */
|
|
return;
|
|
#endif /* ISO || LLC || NETATALK */
|
|
}
|
|
|
|
s = splimp();
|
|
if (IF_QFULL(inq)) {
|
|
IF_DROP(inq);
|
|
m_freem(m);
|
|
} else
|
|
IF_ENQUEUE(inq, m);
|
|
splx(s);
|
|
}
|
|
|
|
/*
|
|
* Perform common duties while attaching to interface list
|
|
*/
|
|
void
|
|
ether_ifattach(ifp)
|
|
register struct ifnet *ifp;
|
|
{
|
|
register struct ifaddr *ifa;
|
|
register struct sockaddr_dl *sdl;
|
|
|
|
ifp->if_type = IFT_ETHER;
|
|
ifp->if_addrlen = 6;
|
|
ifp->if_hdrlen = 14;
|
|
ifp->if_mtu = ETHERMTU;
|
|
ifp->if_resolvemulti = ether_resolvemulti;
|
|
if (ifp->if_baudrate == 0)
|
|
ifp->if_baudrate = 10000000;
|
|
ifa = ifnet_addrs[ifp->if_index - 1];
|
|
if (ifa == 0) {
|
|
printf("ether_ifattach: no lladdr!\n");
|
|
return;
|
|
}
|
|
sdl = (struct sockaddr_dl *)ifa->ifa_addr;
|
|
sdl->sdl_type = IFT_ETHER;
|
|
sdl->sdl_alen = ifp->if_addrlen;
|
|
bcopy((IFP2AC(ifp))->ac_enaddr, LLADDR(sdl), ifp->if_addrlen);
|
|
#ifdef NETGRAPH
|
|
ngether_init(ifp);
|
|
#endif /* NETGRAPH */
|
|
#ifdef INET6
|
|
in6_ifattach_getifid(ifp);
|
|
#endif
|
|
}
|
|
|
|
SYSCTL_DECL(_net_link);
|
|
SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");
|
|
|
|
int
|
|
ether_ioctl(ifp, command, data)
|
|
struct ifnet *ifp;
|
|
int command;
|
|
caddr_t data;
|
|
{
|
|
struct ifaddr *ifa = (struct ifaddr *) data;
|
|
struct ifreq *ifr = (struct ifreq *) data;
|
|
int error = 0;
|
|
|
|
switch (command) {
|
|
case SIOCSIFADDR:
|
|
ifp->if_flags |= IFF_UP;
|
|
|
|
switch (ifa->ifa_addr->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
ifp->if_init(ifp->if_softc); /* before arpwhohas */
|
|
arp_ifinit(IFP2AC(ifp), ifa);
|
|
break;
|
|
#endif
|
|
#ifdef IPX
|
|
/*
|
|
* XXX - This code is probably wrong
|
|
*/
|
|
case AF_IPX:
|
|
{
|
|
register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr);
|
|
struct arpcom *ac = IFP2AC(ifp);
|
|
|
|
if (ipx_nullhost(*ina))
|
|
ina->x_host =
|
|
*(union ipx_host *)
|
|
ac->ac_enaddr;
|
|
else {
|
|
bcopy((caddr_t) ina->x_host.c_host,
|
|
(caddr_t) ac->ac_enaddr,
|
|
sizeof(ac->ac_enaddr));
|
|
}
|
|
|
|
/*
|
|
* Set new address
|
|
*/
|
|
ifp->if_init(ifp->if_softc);
|
|
break;
|
|
}
|
|
#endif
|
|
#ifdef NS
|
|
/*
|
|
* XXX - This code is probably wrong
|
|
*/
|
|
case AF_NS:
|
|
{
|
|
register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
|
|
struct arpcom *ac = IFP2AC(ifp);
|
|
|
|
if (ns_nullhost(*ina))
|
|
ina->x_host =
|
|
*(union ns_host *) (ac->ac_enaddr);
|
|
else {
|
|
bcopy((caddr_t) ina->x_host.c_host,
|
|
(caddr_t) ac->ac_enaddr,
|
|
sizeof(ac->ac_enaddr));
|
|
}
|
|
|
|
/*
|
|
* Set new address
|
|
*/
|
|
ifp->if_init(ifp->if_softc);
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
ifp->if_init(ifp->if_softc);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case SIOCGIFADDR:
|
|
{
|
|
struct sockaddr *sa;
|
|
|
|
sa = (struct sockaddr *) & ifr->ifr_data;
|
|
bcopy(IFP2AC(ifp)->ac_enaddr,
|
|
(caddr_t) sa->sa_data, ETHER_ADDR_LEN);
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
/*
|
|
* Set the interface MTU.
|
|
*/
|
|
if (ifr->ifr_mtu > ETHERMTU) {
|
|
error = EINVAL;
|
|
} else {
|
|
ifp->if_mtu = ifr->ifr_mtu;
|
|
}
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
ether_resolvemulti(ifp, llsa, sa)
|
|
struct ifnet *ifp;
|
|
struct sockaddr **llsa;
|
|
struct sockaddr *sa;
|
|
{
|
|
struct sockaddr_dl *sdl;
|
|
struct sockaddr_in *sin;
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sin6;
|
|
#endif
|
|
u_char *e_addr;
|
|
|
|
switch(sa->sa_family) {
|
|
case AF_LINK:
|
|
/*
|
|
* No mapping needed. Just check that it's a valid MC address.
|
|
*/
|
|
sdl = (struct sockaddr_dl *)sa;
|
|
e_addr = LLADDR(sdl);
|
|
if ((e_addr[0] & 1) != 1)
|
|
return EADDRNOTAVAIL;
|
|
*llsa = 0;
|
|
return 0;
|
|
|
|
#ifdef INET
|
|
case AF_INET:
|
|
sin = (struct sockaddr_in *)sa;
|
|
if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
|
|
return EADDRNOTAVAIL;
|
|
MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
|
|
M_WAITOK);
|
|
sdl->sdl_len = sizeof *sdl;
|
|
sdl->sdl_family = AF_LINK;
|
|
sdl->sdl_index = ifp->if_index;
|
|
sdl->sdl_type = IFT_ETHER;
|
|
sdl->sdl_nlen = 0;
|
|
sdl->sdl_alen = ETHER_ADDR_LEN;
|
|
sdl->sdl_slen = 0;
|
|
e_addr = LLADDR(sdl);
|
|
ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
|
|
*llsa = (struct sockaddr *)sdl;
|
|
return 0;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
sin6 = (struct sockaddr_in6 *)sa;
|
|
if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
|
|
return EADDRNOTAVAIL;
|
|
MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
|
|
M_WAITOK);
|
|
sdl->sdl_len = sizeof *sdl;
|
|
sdl->sdl_family = AF_LINK;
|
|
sdl->sdl_index = ifp->if_index;
|
|
sdl->sdl_type = IFT_ETHER;
|
|
sdl->sdl_nlen = 0;
|
|
sdl->sdl_alen = ETHER_ADDR_LEN;
|
|
sdl->sdl_slen = 0;
|
|
e_addr = LLADDR(sdl);
|
|
ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
|
|
*llsa = (struct sockaddr *)sdl;
|
|
return 0;
|
|
#endif
|
|
|
|
default:
|
|
/*
|
|
* Well, the text isn't quite right, but it's the name
|
|
* that counts...
|
|
*/
|
|
return EAFNOSUPPORT;
|
|
}
|
|
}
|
|
|
|
#ifdef NETGRAPH
|
|
|
|
/***********************************************************************
|
|
* This section contains the methods for the Netgraph interface
|
|
***********************************************************************/
|
|
/* It's Ascii-art time!
|
|
* The ifnet is the first part of the arpcom which must be
|
|
* the first part of the device's softc.. yuk.
|
|
*
|
|
* +--------------------------+-----+---------+
|
|
* | struct ifnet (*ifp) | | |
|
|
* | | | |
|
|
* +--------------------------+ | |
|
|
* +--|[ac_ng] struct arpcom (*ac) | |
|
|
* | +--------------------------------+ |
|
|
* | | struct softc (*ifp->if_softc) (device) |
|
|
* | +------------------------------------------+
|
|
* | ^
|
|
* AC2NG() |
|
|
* | v
|
|
* | +----------------------+
|
|
* | | [private] [flags] |
|
|
* +------>| struct ng_node |
|
|
* | [hooks] | ** we only allow one hook
|
|
* +----------------------+
|
|
* ^
|
|
* |
|
|
* v
|
|
* +-------------+
|
|
* | [node] |
|
|
* | hook |
|
|
* | [private]|-- *unused*
|
|
* +-------------+
|
|
*/
|
|
|
|
/*
|
|
* called during interface attaching
|
|
*/
|
|
static void
|
|
ngether_init(void *ifpvoid)
|
|
{
|
|
struct ifnet *ifp = ifpvoid;
|
|
struct arpcom *ac = IFP2AC(ifp);
|
|
static int ngether_done_init;
|
|
char namebuf[32];
|
|
node_p node;
|
|
|
|
/*
|
|
* we have found a node, make sure our 'type' is availabe.
|
|
*/
|
|
if (ngether_done_init == 0) {
|
|
if (ng_newtype(&typestruct)) {
|
|
printf("ngether install failed\n");
|
|
return;
|
|
}
|
|
ngether_done_init = 1;
|
|
}
|
|
if (ng_make_node_common(&typestruct, &node) != 0)
|
|
return;
|
|
ac->ac_ng = node;
|
|
node->private = ifp;
|
|
sprintf(namebuf, "%s%d", ifp->if_name, ifp->if_unit);
|
|
ng_name_node(AC2NG(ac), namebuf);
|
|
}
|
|
|
|
/*
|
|
* It is not possible or allowable to create a node of this type.
|
|
* If the hardware exists, it will already have created it.
|
|
*/
|
|
static int
|
|
ngether_constructor(node_p *nodep)
|
|
{
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Give our ok for a hook to be added...
|
|
*
|
|
* Allow one hook at a time (rawdata).
|
|
* It can eiteh rdivert everything or only unclaimed packets.
|
|
*/
|
|
static int
|
|
ngether_newhook(node_p node, hook_p hook, const char *name)
|
|
{
|
|
|
|
/* check if there is already a hook */
|
|
if (LIST_FIRST(&(node->hooks)))
|
|
return(EISCONN);
|
|
/*
|
|
* Check for which mode hook we want.
|
|
*/
|
|
if (strcmp(name, NG_ETHER_HOOK_ORPHAN) != 0) {
|
|
if (strcmp(name, NG_ETHER_HOOK_DIVERT) != 0) {
|
|
return (EINVAL);
|
|
}
|
|
node->flags |= NGEF_DIVERT;
|
|
} else {
|
|
node->flags &= ~NGEF_DIVERT;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* incoming messages.
|
|
* Just respond to the generic TEXT_STATUS message
|
|
*/
|
|
static int
|
|
ngether_rcvmsg(node_p node,
|
|
struct ng_mesg *msg, const char *retaddr, struct ng_mesg **resp)
|
|
{
|
|
struct ifnet *ifp;
|
|
int error = 0;
|
|
|
|
ifp = node->private;
|
|
switch (msg->header.typecookie) {
|
|
case NGM_ETHER_COOKIE:
|
|
error = EINVAL;
|
|
break;
|
|
case NGM_GENERIC_COOKIE:
|
|
switch(msg->header.cmd) {
|
|
case NGM_TEXT_STATUS: {
|
|
char *arg;
|
|
int pos = 0;
|
|
int resplen = sizeof(struct ng_mesg) + 512;
|
|
MALLOC(*resp, struct ng_mesg *, resplen,
|
|
M_NETGRAPH, M_NOWAIT);
|
|
if (*resp == NULL) {
|
|
error = ENOMEM;
|
|
break;
|
|
}
|
|
bzero(*resp, resplen);
|
|
arg = (*resp)->data;
|
|
|
|
/*
|
|
* Put in the throughput information.
|
|
*/
|
|
pos = sprintf(arg, "%ld bytes in, %ld bytes out\n",
|
|
ifp->if_ibytes, ifp->if_obytes);
|
|
pos += sprintf(arg + pos,
|
|
"%ld output errors\n",
|
|
ifp->if_oerrors);
|
|
pos += sprintf(arg + pos,
|
|
"ierrors = %ld\n",
|
|
ifp->if_ierrors);
|
|
|
|
(*resp)->header.version = NG_VERSION;
|
|
(*resp)->header.arglen = strlen(arg) + 1;
|
|
(*resp)->header.token = msg->header.token;
|
|
(*resp)->header.typecookie = NGM_ETHER_COOKIE;
|
|
(*resp)->header.cmd = msg->header.cmd;
|
|
strncpy((*resp)->header.cmdstr, "status",
|
|
NG_CMDSTRLEN);
|
|
}
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
free(msg, M_NETGRAPH);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Receive a completed ethernet packet.
|
|
* Queue it for output.
|
|
*/
|
|
static int
|
|
ngether_rcvdata(hook_p hook, struct mbuf *m, meta_p meta)
|
|
{
|
|
struct ifnet *ifp;
|
|
int error = 0;
|
|
int s;
|
|
struct ether_header *eh;
|
|
|
|
ifp = hook->node->private;
|
|
|
|
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
|
|
senderr(ENETDOWN);
|
|
/* drop in the MAC address */
|
|
eh = mtod(m, struct ether_header *);
|
|
bcopy(IFP2AC(ifp)->ac_enaddr, eh->ether_shost, 6);
|
|
/*
|
|
* If a simplex interface, and the packet is being sent to our
|
|
* Ethernet address or a broadcast address, loopback a copy.
|
|
* XXX To make a simplex device behave exactly like a duplex
|
|
* device, we should copy in the case of sending to our own
|
|
* ethernet address (thus letting the original actually appear
|
|
* on the wire). However, we don't do that here for security
|
|
* reasons and compatibility with the original behavior.
|
|
*/
|
|
if (ifp->if_flags & IFF_SIMPLEX) {
|
|
if (m->m_flags & M_BCAST) {
|
|
struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
|
|
|
|
ng_queue_data(hook, n, meta);
|
|
} else if (bcmp(eh->ether_dhost,
|
|
eh->ether_shost, ETHER_ADDR_LEN) == 0) {
|
|
ng_queue_data(hook, m, meta);
|
|
return (0); /* XXX */
|
|
}
|
|
}
|
|
s = splimp();
|
|
/*
|
|
* Queue message on interface, and start output if interface
|
|
* not yet active.
|
|
* XXX if we lookead at the priority in the meta data we could
|
|
* queue high priority items at the head.
|
|
*/
|
|
if (IF_QFULL(&ifp->if_snd)) {
|
|
IF_DROP(&ifp->if_snd);
|
|
splx(s);
|
|
senderr(ENOBUFS);
|
|
}
|
|
IF_ENQUEUE(&ifp->if_snd, m);
|
|
if ((ifp->if_flags & IFF_OACTIVE) == 0)
|
|
(*ifp->if_start)(ifp);
|
|
splx(s);
|
|
ifp->if_obytes += m->m_pkthdr.len;
|
|
if (m->m_flags & M_MCAST)
|
|
ifp->if_omcasts++;
|
|
return (error);
|
|
|
|
bad:
|
|
NG_FREE_DATA(m, meta);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* pass an mbuf out to the connected hook
|
|
* More complicated than just an m_prepend, as it tries to save later nodes
|
|
* from needing to do lots of m_pullups.
|
|
*/
|
|
static void
|
|
ngether_send(struct arpcom *ac, struct ether_header *eh, struct mbuf *m)
|
|
{
|
|
int room;
|
|
node_p node = AC2NG(ac);
|
|
struct ether_header *eh2;
|
|
|
|
if (node && LIST_FIRST(&(node->hooks))) {
|
|
/*
|
|
* Possibly the header is already on the front,
|
|
*/
|
|
eh2 = mtod(m, struct ether_header *) - 1;
|
|
if ( eh == eh2) {
|
|
/*
|
|
* This is the case so just move the markers back to
|
|
* re-include it. We lucked out.
|
|
* This allows us to avoid a yucky m_pullup
|
|
* in later nodes if it works.
|
|
*/
|
|
m->m_len += sizeof(*eh);
|
|
m->m_data -= sizeof(*eh);
|
|
m->m_pkthdr.len += sizeof(*eh);
|
|
} else {
|
|
/*
|
|
* Alternatively there may be room even though
|
|
* it is stored somewhere else. If so, copy it in.
|
|
* This only safe because we KNOW that this packet has
|
|
* just been generated by an ethernet card, so there
|
|
* are no aliases to the buffer. (unlike in outgoing
|
|
* packets).
|
|
* Nearly all ethernet cards will end up producing mbufs
|
|
* that fall into these cases. So we are not optimising
|
|
* contorted cases.
|
|
*/
|
|
|
|
if (m->m_flags & M_EXT) {
|
|
room = (mtod(m, caddr_t) - m->m_ext.ext_buf);
|
|
if (room > m->m_ext.ext_size) /* garbage */
|
|
room = 0; /* fail immediatly */
|
|
} else {
|
|
room = (mtod(m, caddr_t) - m->m_pktdat);
|
|
}
|
|
if (room > sizeof (*eh)) {
|
|
/* we have room, just copy it and adjust */
|
|
m->m_len += sizeof(*eh);
|
|
m->m_data -= sizeof(*eh);
|
|
m->m_pkthdr.len += sizeof(*eh);
|
|
} else {
|
|
/*
|
|
* Doing anything more is likely to get more
|
|
* expensive than it's worth..
|
|
* it's probable that everything else is in one
|
|
* big lump. The next node will do an m_pullup()
|
|
* for exactly the amount of data it needs and
|
|
* hopefully everything after that will not
|
|
* need one. So let's just use M_PREPEND.
|
|
*/
|
|
M_PREPEND(m, sizeof (*eh), M_DONTWAIT);
|
|
if (m == NULL)
|
|
return;
|
|
}
|
|
bcopy ((caddr_t)eh, mtod(m, struct ether_header *),
|
|
sizeof(*eh));
|
|
}
|
|
ng_queue_data(LIST_FIRST(&(node->hooks)), m, NULL);
|
|
} else {
|
|
m_freem(m);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* do local shutdown processing..
|
|
* This node will refuse to go away, unless the hardware says to..
|
|
* don't unref the node, or remove our name. just clear our links up.
|
|
*/
|
|
static int
|
|
ngether_rmnode(node_p node)
|
|
{
|
|
ng_cutlinks(node);
|
|
node->flags &= ~NG_INVALID; /* bounce back to life */
|
|
return (0);
|
|
}
|
|
|
|
/* already linked */
|
|
static int
|
|
ngether_connect(hook_p hook)
|
|
{
|
|
/* be really amiable and just say "YUP that's OK by me! " */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* notify on hook disconnection (destruction)
|
|
*
|
|
* For this type, removal of the last lins no effect. The interface can run
|
|
* independently.
|
|
* Since we have no per-hook information, this is rather simple.
|
|
*/
|
|
static int
|
|
ngether_disconnect(hook_p hook)
|
|
{
|
|
hook->node->flags &= ~NGEF_DIVERT;
|
|
return (0);
|
|
}
|
|
#endif /* NETGRAPH */
|
|
|
|
/********************************** END *************************************/
|