615 lines
13 KiB
C
615 lines
13 KiB
C
/*-
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* Copyright (c) 1999, 2000 Boris Popov
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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* $FreeBSD$
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*/
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#include "opt_inet.h"
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#include "opt_ipx.h"
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#include "opt_ef.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sockio.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/syslog.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <net/ethernet.h>
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#include <net/if_llc.h>
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#include <net/if.h>
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#include <net/if_arp.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/netisr.h>
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#include <net/route.h>
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#include <net/bpf.h>
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#ifdef INET
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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 IPX
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#include <netipx/ipx.h>
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#include <netipx/ipx_if.h>
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#endif
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/* internal frame types */
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#define ETHER_FT_EII 0 /* Ethernet_II - default */
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#define ETHER_FT_8023 1 /* 802.3 (Novell) */
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#define ETHER_FT_8022 2 /* 802.2 */
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#define ETHER_FT_SNAP 3 /* SNAP */
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#define EF_NFT 4 /* total number of frame types */
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#ifdef EF_DEBUG
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#define EFDEBUG(format, args...) printf("%s: "format, __func__ ,## args)
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#else
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#define EFDEBUG(format, args...)
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#endif
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#define EFERROR(format, args...) printf("%s: "format, __func__ ,## args)
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struct efnet {
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struct arpcom ef_ac;
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struct ifnet * ef_ifp;
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};
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struct ef_link {
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SLIST_ENTRY(ef_link) el_next;
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struct ifnet *el_ifp; /* raw device for this clones */
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struct efnet *el_units[EF_NFT]; /* our clones */
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};
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static SLIST_HEAD(ef_link_head, ef_link) efdev = {NULL};
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static int efcount;
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extern int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m);
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extern int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
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struct sockaddr *dst, short *tp, int *hlen);
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/*
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static void ef_reset (struct ifnet *);
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*/
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static int ef_attach(struct efnet *sc);
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static int ef_detach(struct efnet *sc);
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static void ef_init(void *);
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static int ef_ioctl(struct ifnet *, u_long, caddr_t);
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static void ef_start(struct ifnet *);
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static int ef_input(struct ifnet*, struct ether_header *, struct mbuf *);
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static int ef_output(struct ifnet *ifp, struct mbuf **mp,
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struct sockaddr *dst, short *tp, int *hlen);
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static int ef_load(void);
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static int ef_unload(void);
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/*
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* Install the interface, most of structure initialization done in ef_clone()
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*/
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static int
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ef_attach(struct efnet *sc)
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{
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struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
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struct ifaddr *ifa1, *ifa2;
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struct sockaddr_dl *sdl1, *sdl2;
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ifp->if_output = ether_output;
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ifp->if_start = ef_start;
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ifp->if_watchdog = NULL;
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ifp->if_init = ef_init;
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ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
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ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
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/*
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* Attach the interface
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*/
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ether_ifattach(ifp, ETHER_BPF_SUPPORTED);
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ifp->if_resolvemulti = 0;
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ifp->if_type = IFT_XETHER;
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ifp->if_flags |= IFF_RUNNING;
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ifa1 = ifaddr_byindex(ifp->if_index);
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ifa2 = ifaddr_byindex(sc->ef_ifp->if_index);
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sdl1 = (struct sockaddr_dl *)ifa1->ifa_addr;
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sdl2 = (struct sockaddr_dl *)ifa2->ifa_addr;
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sdl1->sdl_type = IFT_ETHER;
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sdl1->sdl_alen = ETHER_ADDR_LEN;
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bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN);
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bcopy(LLADDR(sdl2), sc->ef_ac.ac_enaddr, ETHER_ADDR_LEN);
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EFDEBUG("%s%d: attached\n", ifp->if_name, ifp->if_unit);
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return 1;
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}
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/*
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* This is for _testing_only_, just removes interface from interfaces list
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*/
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static int
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ef_detach(struct efnet *sc)
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{
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struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
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int s;
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s = splimp();
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if (ifp->if_flags & IFF_UP) {
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if_down(ifp);
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if (ifp->if_flags & IFF_RUNNING) {
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/* find internet addresses and delete routes */
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register struct ifaddr *ifa;
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TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
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rtinit(ifa, (int)RTM_DELETE, 0);
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}
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}
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}
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TAILQ_REMOVE(&ifnet, ifp, if_link);
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splx(s);
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return 0;
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}
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static void
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ef_init(void *foo) {
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return;
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}
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static int
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ef_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
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{
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/* struct ef_link *sc = (struct ef_link*)ifp->if_softc;*/
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struct ifaddr *ifa = (struct ifaddr*)data;
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int s, error;
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EFDEBUG("IOCTL %ld for %s%d\n", cmd, ifp->if_name, ifp->if_unit);
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error = 0;
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s = splimp();
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switch (cmd) {
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case SIOCSIFADDR:
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if (ifp->if_unit == ETHER_FT_8023 &&
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ifa->ifa_addr->sa_family != AF_IPX) {
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error = EAFNOSUPPORT;
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break;
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}
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ifp->if_flags |= IFF_UP;
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/* FALL THROUGH */
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case SIOCGIFADDR:
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case SIOCSIFMTU:
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error = ether_ioctl(ifp, cmd, data);
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break;
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case SIOCSIFFLAGS:
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error = 0;
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break;
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default:
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error = EINVAL;
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}
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splx(s);
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return error;
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}
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/*
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* Currently packet prepared in the ether_output(), but this can be a better
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* place.
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*/
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static void
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ef_start(struct ifnet *ifp)
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{
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struct efnet *sc = (struct efnet*)ifp->if_softc;
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struct ifnet *p;
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struct mbuf *m;
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ifp->if_flags |= IFF_OACTIVE;
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p = sc->ef_ifp;
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EFDEBUG("\n");
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for (;;) {
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IF_DEQUEUE(&ifp->if_snd, m);
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if (m == 0)
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break;
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if (ifp->if_bpf)
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bpf_mtap(ifp, m);
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if (! IF_HANDOFF(&p->if_snd, m, p)) {
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ifp->if_oerrors++;
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continue;
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}
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ifp->if_opackets++;
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}
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ifp->if_flags &= ~IFF_OACTIVE;
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return;
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}
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/*
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* Inline functions do not put additional overhead to procedure call or
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* parameter passing but simplify the code
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*/
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static int __inline
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ef_inputEII(struct mbuf *m, struct ether_header *eh, struct llc* l,
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u_short ether_type, struct ifqueue **inq)
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{
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switch(ether_type) {
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#ifdef IPX
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case ETHERTYPE_IPX:
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schednetisr(NETISR_IPX);
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*inq = &ipxintrq;
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break;
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#endif
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#ifdef INET
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case ETHERTYPE_IP:
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if (ipflow_fastforward(m))
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return 1;
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schednetisr(NETISR_IP);
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*inq = &ipintrq;
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break;
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case ETHERTYPE_ARP:
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schednetisr(NETISR_ARP);
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*inq = &arpintrq;
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break;
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#endif
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default:
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return EPROTONOSUPPORT;
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}
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return 0;
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}
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static int __inline
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ef_inputSNAP(struct mbuf *m, struct ether_header *eh, struct llc* l,
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u_short ether_type, struct ifqueue **inq)
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{
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switch(ether_type) {
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#ifdef IPX
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case ETHERTYPE_IPX:
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m_adj(m, 8);
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schednetisr(NETISR_IPX);
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*inq = &ipxintrq;
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break;
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#endif
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default:
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return EPROTONOSUPPORT;
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}
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return 0;
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}
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static int __inline
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ef_input8022(struct mbuf *m, struct ether_header *eh, struct llc* l,
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u_short ether_type, struct ifqueue **inq)
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{
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switch(ether_type) {
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#ifdef IPX
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case 0xe0:
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m_adj(m, 3);
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schednetisr(NETISR_IPX);
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*inq = &ipxintrq;
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break;
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#endif
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default:
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return EPROTONOSUPPORT;
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}
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return 0;
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}
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/*
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* Called from ether_input()
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*/
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static int
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ef_input(struct ifnet *ifp, struct ether_header *eh, struct mbuf *m)
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{
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u_short ether_type;
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int ft = -1;
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struct ifqueue *inq;
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struct efnet *efp;
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struct ifnet *eifp;
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struct llc *l;
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struct ef_link *efl;
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ether_type = ntohs(eh->ether_type);
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if (ether_type < ETHERMTU) {
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l = mtod(m, struct llc*);
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if (l->llc_dsap == 0xff && l->llc_ssap == 0xff) {
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/*
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* Novell's "802.3" frame
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*/
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ft = ETHER_FT_8023;
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} else if (l->llc_dsap == 0xaa && l->llc_ssap == 0xaa) {
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/*
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* 802.2/SNAP
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*/
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ft = ETHER_FT_SNAP;
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ether_type = ntohs(l->llc_un.type_snap.ether_type);
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} else if (l->llc_dsap == l->llc_ssap) {
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/*
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* 802.3/802.2
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*/
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ft = ETHER_FT_8022;
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ether_type = l->llc_ssap;
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}
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} else
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ft = ETHER_FT_EII;
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if (ft == -1) {
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EFDEBUG("Unrecognised ether_type %x\n", ether_type);
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return EPROTONOSUPPORT;
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}
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/*
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* Check if interface configured for the given frame
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*/
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efp = NULL;
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SLIST_FOREACH(efl, &efdev, el_next) {
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if (efl->el_ifp == ifp) {
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efp = efl->el_units[ft];
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break;
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}
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}
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if (efp == NULL) {
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EFDEBUG("Can't find if for %d\n", ft);
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return EPROTONOSUPPORT;
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}
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eifp = &efp->ef_ac.ac_if;
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if ((eifp->if_flags & IFF_UP) == 0)
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return EPROTONOSUPPORT;
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eifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
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m->m_pkthdr.rcvif = eifp;
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if (eifp->if_bpf) {
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struct mbuf m0;
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m0.m_next = m;
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m0.m_len = sizeof(struct ether_header);
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m0.m_data = (char *)eh;
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bpf_mtap(eifp, &m0);
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}
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/*
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* Now we ready to adjust mbufs and pass them to protocol intr's
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*/
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inq = NULL;
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switch(ft) {
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case ETHER_FT_EII:
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if (ef_inputEII(m, eh, l, ether_type, &inq) != 0)
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return EPROTONOSUPPORT;
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break;
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#ifdef IPX
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case ETHER_FT_8023: /* only IPX can be here */
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schednetisr(NETISR_IPX);
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inq = &ipxintrq;
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break;
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#endif
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case ETHER_FT_SNAP:
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if (ef_inputSNAP(m, eh, l, ether_type, &inq) != 0)
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return EPROTONOSUPPORT;
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break;
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case ETHER_FT_8022:
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if (ef_input8022(m, eh, l, ether_type, &inq) != 0)
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return EPROTONOSUPPORT;
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break;
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}
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if (inq == NULL) {
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EFDEBUG("No support for frame %d and proto %04x\n",
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ft, ether_type);
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return EPROTONOSUPPORT;
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}
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(void) IF_HANDOFF(inq, m, NULL);
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return 0;
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}
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static int
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ef_output(struct ifnet *ifp, struct mbuf **mp, struct sockaddr *dst, short *tp,
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int *hlen)
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{
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struct mbuf *m = *mp;
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u_char *cp;
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short type;
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if (ifp->if_type != IFT_XETHER)
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return ENETDOWN;
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switch (ifp->if_unit) {
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case ETHER_FT_EII:
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#ifdef IPX
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type = htons(ETHERTYPE_IPX);
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#else
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return EPFNOSUPPORT;
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#endif
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break;
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case ETHER_FT_8023:
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type = htons(m->m_pkthdr.len);
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break;
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case ETHER_FT_8022:
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M_PREPEND(m, ETHER_HDR_LEN + 3, M_TRYWAIT);
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if (m == NULL) {
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*mp = NULL;
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return ENOBUFS;
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}
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/*
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* Ensure that ethernet header and next three bytes
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* will fit into single mbuf
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*/
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m = m_pullup(m, ETHER_HDR_LEN + 3);
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if (m == NULL) {
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*mp = NULL;
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return ENOBUFS;
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}
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m_adj(m, ETHER_HDR_LEN);
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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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*hlen += 3;
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break;
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case ETHER_FT_SNAP:
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M_PREPEND(m, 8, M_TRYWAIT);
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if (m == NULL) {
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*mp = NULL;
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return ENOBUFS;
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}
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type = htons(m->m_pkthdr.len);
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cp = mtod(m, u_char *);
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bcopy("\xAA\xAA\x03\x00\x00\x00\x81\x37", cp, 8);
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*hlen += 8;
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break;
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default:
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return EPFNOSUPPORT;
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}
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*mp = m;
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*tp = type;
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return 0;
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}
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/*
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* Create clone from the given interface
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*/
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static int
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ef_clone(struct ef_link *efl, int ft)
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{
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struct efnet *efp;
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struct ifnet *eifp;
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struct ifnet *ifp = efl->el_ifp;
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char cbuf[IFNAMSIZ], *ifname;
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int ifnlen;
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efp = (struct efnet*)malloc(sizeof(struct efnet), M_IFADDR,
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M_WAITOK | M_ZERO);
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if (efp == NULL)
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return ENOMEM;
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efp->ef_ifp = ifp;
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eifp = &efp->ef_ac.ac_if;
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ifnlen = 1 + snprintf(cbuf, sizeof(cbuf), "%s%df", ifp->if_name,
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ifp->if_unit);
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ifname = (char*)malloc(ifnlen, M_IFADDR, M_WAITOK);
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eifp->if_name = strcpy(ifname, cbuf);
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eifp->if_unit = ft;
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eifp->if_softc = efp;
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if (ifp->if_ioctl)
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eifp->if_ioctl = ef_ioctl;
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efl->el_units[ft] = efp;
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return 0;
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}
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static int
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ef_load(void)
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{
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struct ifnet *ifp;
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struct efnet *efp;
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struct ef_link *efl = NULL;
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int error = 0, d;
|
|
|
|
TAILQ_FOREACH(ifp, &ifnet, if_link) {
|
|
if (ifp->if_type != IFT_ETHER) continue;
|
|
EFDEBUG("Found interface %s%d\n", ifp->if_name, ifp->if_unit);
|
|
efl = (struct ef_link*)malloc(sizeof(struct ef_link),
|
|
M_IFADDR, M_WAITOK);
|
|
if (efl == NULL) {
|
|
error = ENOMEM;
|
|
break;
|
|
}
|
|
bzero(efl, sizeof(*efl));
|
|
|
|
efl->el_ifp = ifp;
|
|
#ifdef ETHER_II
|
|
error = ef_clone(efl, ETHER_FT_EII);
|
|
if (error) break;
|
|
#endif
|
|
#ifdef ETHER_8023
|
|
error = ef_clone(efl, ETHER_FT_8023);
|
|
if (error) break;
|
|
#endif
|
|
#ifdef ETHER_8022
|
|
error = ef_clone(efl, ETHER_FT_8022);
|
|
if (error) break;
|
|
#endif
|
|
#ifdef ETHER_SNAP
|
|
error = ef_clone(efl, ETHER_FT_SNAP);
|
|
if (error) break;
|
|
#endif
|
|
efcount++;
|
|
SLIST_INSERT_HEAD(&efdev, efl, el_next);
|
|
}
|
|
if (error) {
|
|
if (efl)
|
|
SLIST_INSERT_HEAD(&efdev, efl, el_next);
|
|
SLIST_FOREACH(efl, &efdev, el_next) {
|
|
for (d = 0; d < EF_NFT; d++)
|
|
if (efl->el_units[d])
|
|
free(efl->el_units[d], M_IFADDR);
|
|
free(efl, M_IFADDR);
|
|
}
|
|
return error;
|
|
}
|
|
SLIST_FOREACH(efl, &efdev, el_next) {
|
|
for (d = 0; d < EF_NFT; d++) {
|
|
efp = efl->el_units[d];
|
|
if (efp)
|
|
ef_attach(efp);
|
|
}
|
|
}
|
|
ef_inputp = ef_input;
|
|
ef_outputp = ef_output;
|
|
EFDEBUG("Loaded\n");
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
ef_unload(void)
|
|
{
|
|
struct efnet *efp;
|
|
struct ef_link *efl;
|
|
int d;
|
|
|
|
ef_inputp = NULL;
|
|
ef_outputp = NULL;
|
|
SLIST_FOREACH(efl, &efdev, el_next) {
|
|
for (d = 0; d < EF_NFT; d++) {
|
|
efp = efl->el_units[d];
|
|
if (efp) {
|
|
ef_detach(efp);
|
|
}
|
|
}
|
|
}
|
|
EFDEBUG("Unloaded\n");
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
if_ef_modevent(module_t mod, int type, void *data)
|
|
{
|
|
switch ((modeventtype_t)type) {
|
|
case MOD_LOAD:
|
|
return ef_load();
|
|
case MOD_UNLOAD:
|
|
return ef_unload();
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static moduledata_t if_ef_mod = {
|
|
"if_ef", if_ef_modevent, NULL
|
|
};
|
|
|
|
DECLARE_MODULE(if_ef, if_ef_mod, SI_SUB_PSEUDO, SI_ORDER_MIDDLE);
|