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-rw-r--r--freebsd/sys/net/if_ef.c610
1 files changed, 610 insertions, 0 deletions
diff --git a/freebsd/sys/net/if_ef.c b/freebsd/sys/net/if_ef.c
new file mode 100644
index 00000000..8114806c
--- /dev/null
+++ b/freebsd/sys/net/if_ef.c
@@ -0,0 +1,610 @@
+#include <freebsd/machine/rtems-bsd-config.h>
+
+/*-
+ * Copyright (c) 1999, 2000 Boris Popov
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <freebsd/local/opt_inet.h>
+#include <freebsd/local/opt_ipx.h>
+#include <freebsd/local/opt_ef.h>
+
+#include <freebsd/sys/param.h>
+#include <freebsd/sys/systm.h>
+#include <freebsd/sys/sockio.h>
+#include <freebsd/sys/malloc.h>
+#include <freebsd/sys/mbuf.h>
+#include <freebsd/sys/socket.h>
+#include <freebsd/sys/syslog.h>
+#include <freebsd/sys/kernel.h>
+#include <freebsd/sys/module.h>
+
+#include <freebsd/net/ethernet.h>
+#include <freebsd/net/if_llc.h>
+#include <freebsd/net/if.h>
+#include <freebsd/net/if_arp.h>
+#include <freebsd/net/if_dl.h>
+#include <freebsd/net/if_types.h>
+#include <freebsd/net/netisr.h>
+#include <freebsd/net/bpf.h>
+#include <freebsd/net/vnet.h>
+
+#ifdef INET
+#include <freebsd/netinet/in.h>
+#include <freebsd/netinet/in_var.h>
+#include <freebsd/netinet/if_ether.h>
+#endif
+
+#ifdef IPX
+#include <freebsd/netipx/ipx.h>
+#include <freebsd/netipx/ipx_if.h>
+#endif
+
+/* If none of the supported layers is enabled explicitly enable them all */
+#if !defined(ETHER_II) && !defined(ETHER_8023) && !defined(ETHER_8022) && \
+ !defined(ETHER_SNAP)
+#define ETHER_II 1
+#define ETHER_8023 1
+#define ETHER_8022 1
+#define ETHER_SNAP 1
+#endif
+
+/* internal frame types */
+#define ETHER_FT_EII 0 /* Ethernet_II - default */
+#define ETHER_FT_8023 1 /* 802.3 (Novell) */
+#define ETHER_FT_8022 2 /* 802.2 */
+#define ETHER_FT_SNAP 3 /* SNAP */
+#define EF_NFT 4 /* total number of frame types */
+
+#ifdef EF_DEBUG
+#define EFDEBUG(format, args...) printf("%s: "format, __func__ ,## args)
+#else
+#define EFDEBUG(format, args...)
+#endif
+
+#define EFERROR(format, args...) printf("%s: "format, __func__ ,## args)
+
+struct efnet {
+ struct ifnet *ef_ifp;
+ struct ifnet *ef_pifp;
+ int ef_frametype;
+};
+
+struct ef_link {
+ SLIST_ENTRY(ef_link) el_next;
+ struct ifnet *el_ifp; /* raw device for this clones */
+ struct efnet *el_units[EF_NFT]; /* our clones */
+};
+
+static SLIST_HEAD(ef_link_head, ef_link) efdev = {NULL};
+static int efcount;
+
+extern int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m);
+extern int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
+ struct sockaddr *dst, short *tp, int *hlen);
+
+/*
+static void ef_reset (struct ifnet *);
+*/
+static int ef_attach(struct efnet *sc);
+static int ef_detach(struct efnet *sc);
+static void ef_init(void *);
+static int ef_ioctl(struct ifnet *, u_long, caddr_t);
+static void ef_start(struct ifnet *);
+static int ef_input(struct ifnet*, struct ether_header *, struct mbuf *);
+static int ef_output(struct ifnet *ifp, struct mbuf **mp,
+ struct sockaddr *dst, short *tp, int *hlen);
+
+static int ef_load(void);
+static int ef_unload(void);
+
+/*
+ * Install the interface, most of structure initialization done in ef_clone()
+ */
+static int
+ef_attach(struct efnet *sc)
+{
+ struct ifnet *ifp = sc->ef_ifp;
+
+ ifp->if_start = ef_start;
+ ifp->if_init = ef_init;
+ ifp->if_snd.ifq_maxlen = ifqmaxlen;
+ ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
+ /*
+ * Attach the interface
+ */
+ ether_ifattach(ifp, IF_LLADDR(sc->ef_pifp));
+
+ ifp->if_resolvemulti = 0;
+ ifp->if_type = IFT_XETHER;
+ ifp->if_drv_flags |= IFF_DRV_RUNNING;
+
+ EFDEBUG("%s: attached\n", ifp->if_xname);
+ return 1;
+}
+
+/*
+ * This is for _testing_only_, just removes interface from interfaces list
+ */
+static int
+ef_detach(struct efnet *sc)
+{
+ struct ifnet *ifp = sc->ef_ifp;
+ int s;
+
+ s = splimp();
+
+ ether_ifdetach(ifp);
+ if_free(ifp);
+
+ splx(s);
+ return 0;
+}
+
+static void
+ef_init(void *foo) {
+ return;
+}
+
+static int
+ef_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
+{
+ struct efnet *sc = ifp->if_softc;
+ struct ifaddr *ifa = (struct ifaddr*)data;
+ int s, error;
+
+ EFDEBUG("IOCTL %ld for %s\n", cmd, ifp->if_xname);
+ error = 0;
+ s = splimp();
+ switch (cmd) {
+ case SIOCSIFFLAGS:
+ error = 0;
+ break;
+ case SIOCSIFADDR:
+ if (sc->ef_frametype == ETHER_FT_8023 &&
+ ifa->ifa_addr->sa_family != AF_IPX) {
+ error = EAFNOSUPPORT;
+ break;
+ }
+ ifp->if_flags |= IFF_UP;
+ /* FALL THROUGH */
+ default:
+ error = ether_ioctl(ifp, cmd, data);
+ break;
+ }
+ splx(s);
+ return error;
+}
+
+/*
+ * Currently packet prepared in the ether_output(), but this can be a better
+ * place.
+ */
+static void
+ef_start(struct ifnet *ifp)
+{
+ struct efnet *sc = (struct efnet*)ifp->if_softc;
+ struct ifnet *p;
+ struct mbuf *m;
+ int error;
+
+ ifp->if_drv_flags |= IFF_DRV_OACTIVE;
+ p = sc->ef_pifp;
+
+ EFDEBUG("\n");
+ for (;;) {
+ IF_DEQUEUE(&ifp->if_snd, m);
+ if (m == 0)
+ break;
+ BPF_MTAP(ifp, m);
+ error = p->if_transmit(p, m);
+ if (error) {
+ ifp->if_oerrors++;
+ continue;
+ }
+ ifp->if_opackets++;
+ }
+ ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
+ return;
+}
+
+/*
+ * Inline functions do not put additional overhead to procedure call or
+ * parameter passing but simplify the code
+ */
+static int __inline
+ef_inputEII(struct mbuf *m, struct ether_header *eh, u_short ether_type)
+{
+ int isr;
+
+ switch(ether_type) {
+#ifdef IPX
+ case ETHERTYPE_IPX:
+ isr = NETISR_IPX;
+ break;
+#endif
+#ifdef INET
+ case ETHERTYPE_IP:
+ if ((m = ip_fastforward(m)) == NULL)
+ return (0);
+ isr = NETISR_IP;
+ break;
+
+ case ETHERTYPE_ARP:
+ isr = NETISR_ARP;
+ break;
+#endif
+ default:
+ return (EPROTONOSUPPORT);
+ }
+ netisr_dispatch(isr, m);
+ return (0);
+}
+
+static int __inline
+ef_inputSNAP(struct mbuf *m, struct ether_header *eh, struct llc* l,
+ u_short ether_type)
+{
+ int isr;
+
+ switch(ether_type) {
+#ifdef IPX
+ case ETHERTYPE_IPX:
+ m_adj(m, 8);
+ isr = NETISR_IPX;
+ break;
+#endif
+ default:
+ return (EPROTONOSUPPORT);
+ }
+ netisr_dispatch(isr, m);
+ return (0);
+}
+
+static int __inline
+ef_input8022(struct mbuf *m, struct ether_header *eh, struct llc* l,
+ u_short ether_type)
+{
+ int isr;
+
+ switch(ether_type) {
+#ifdef IPX
+ case 0xe0:
+ m_adj(m, 3);
+ isr = NETISR_IPX;
+ break;
+#endif
+ default:
+ return (EPROTONOSUPPORT);
+ }
+ netisr_dispatch(isr, m);
+ return (0);
+}
+
+/*
+ * Called from ether_input()
+ */
+static int
+ef_input(struct ifnet *ifp, struct ether_header *eh, struct mbuf *m)
+{
+ u_short ether_type;
+ int ft = -1;
+ struct efnet *efp;
+ struct ifnet *eifp;
+ struct llc *l;
+ struct ef_link *efl;
+ int isr;
+
+ ether_type = ntohs(eh->ether_type);
+ l = NULL;
+ if (ether_type < ETHERMTU) {
+ l = mtod(m, struct llc*);
+ if (l->llc_dsap == 0xff && l->llc_ssap == 0xff) {
+ /*
+ * Novell's "802.3" frame
+ */
+ ft = ETHER_FT_8023;
+ } else if (l->llc_dsap == 0xaa && l->llc_ssap == 0xaa) {
+ /*
+ * 802.2/SNAP
+ */
+ ft = ETHER_FT_SNAP;
+ ether_type = ntohs(l->llc_un.type_snap.ether_type);
+ } else if (l->llc_dsap == l->llc_ssap) {
+ /*
+ * 802.3/802.2
+ */
+ ft = ETHER_FT_8022;
+ ether_type = l->llc_ssap;
+ }
+ } else
+ ft = ETHER_FT_EII;
+
+ if (ft == -1) {
+ EFDEBUG("Unrecognised ether_type %x\n", ether_type);
+ return EPROTONOSUPPORT;
+ }
+
+ /*
+ * Check if interface configured for the given frame
+ */
+ efp = NULL;
+ SLIST_FOREACH(efl, &efdev, el_next) {
+ if (efl->el_ifp == ifp) {
+ efp = efl->el_units[ft];
+ break;
+ }
+ }
+ if (efp == NULL) {
+ EFDEBUG("Can't find if for %d\n", ft);
+ return EPROTONOSUPPORT;
+ }
+ eifp = efp->ef_ifp;
+ if ((eifp->if_flags & IFF_UP) == 0)
+ return EPROTONOSUPPORT;
+ eifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
+ m->m_pkthdr.rcvif = eifp;
+
+ BPF_MTAP2(eifp, eh, ETHER_HDR_LEN, m);
+ /*
+ * Now we ready to adjust mbufs and pass them to protocol intr's
+ */
+ switch(ft) {
+ case ETHER_FT_EII:
+ return (ef_inputEII(m, eh, ether_type));
+#ifdef IPX
+ case ETHER_FT_8023: /* only IPX can be here */
+ isr = NETISR_IPX;
+ break;
+#endif
+ case ETHER_FT_SNAP:
+ return (ef_inputSNAP(m, eh, l, ether_type));
+ case ETHER_FT_8022:
+ return (ef_input8022(m, eh, l, ether_type));
+ default:
+ EFDEBUG("No support for frame %d and proto %04x\n",
+ ft, ether_type);
+ return (EPROTONOSUPPORT);
+ }
+ netisr_dispatch(isr, m);
+ return (0);
+}
+
+static int
+ef_output(struct ifnet *ifp, struct mbuf **mp, struct sockaddr *dst, short *tp,
+ int *hlen)
+{
+ struct efnet *sc = (struct efnet*)ifp->if_softc;
+ struct mbuf *m = *mp;
+ u_char *cp;
+ short type;
+
+ if (ifp->if_type != IFT_XETHER)
+ return ENETDOWN;
+ switch (sc->ef_frametype) {
+ case ETHER_FT_EII:
+#ifdef IPX
+ type = htons(ETHERTYPE_IPX);
+#else
+ return EPFNOSUPPORT;
+#endif
+ break;
+ case ETHER_FT_8023:
+ type = htons(m->m_pkthdr.len);
+ break;
+ case ETHER_FT_8022:
+ M_PREPEND(m, ETHER_HDR_LEN + 3, M_WAIT);
+ /*
+ * Ensure that ethernet header and next three bytes
+ * will fit into single mbuf
+ */
+ m = m_pullup(m, ETHER_HDR_LEN + 3);
+ if (m == NULL) {
+ *mp = NULL;
+ return ENOBUFS;
+ }
+ m_adj(m, ETHER_HDR_LEN);
+ type = htons(m->m_pkthdr.len);
+ cp = mtod(m, u_char *);
+ *cp++ = 0xE0;
+ *cp++ = 0xE0;
+ *cp++ = 0x03;
+ *hlen += 3;
+ break;
+ case ETHER_FT_SNAP:
+ M_PREPEND(m, 8, M_WAIT);
+ type = htons(m->m_pkthdr.len);
+ cp = mtod(m, u_char *);
+ bcopy("\xAA\xAA\x03\x00\x00\x00\x81\x37", cp, 8);
+ *hlen += 8;
+ break;
+ default:
+ return EPFNOSUPPORT;
+ }
+ *mp = m;
+ *tp = type;
+ return 0;
+}
+
+/*
+ * Create clone from the given interface
+ */
+static int
+ef_clone(struct ef_link *efl, int ft)
+{
+ struct efnet *efp;
+ struct ifnet *eifp;
+ struct ifnet *ifp = efl->el_ifp;
+
+ efp = (struct efnet*)malloc(sizeof(struct efnet), M_IFADDR,
+ M_WAITOK | M_ZERO);
+ if (efp == NULL)
+ return ENOMEM;
+ efp->ef_pifp = ifp;
+ efp->ef_frametype = ft;
+ eifp = efp->ef_ifp = if_alloc(IFT_ETHER);
+ if (eifp == NULL) {
+ free(efp, M_IFADDR);
+ return (ENOSPC);
+ }
+ snprintf(eifp->if_xname, IFNAMSIZ,
+ "%sf%d", ifp->if_xname, efp->ef_frametype);
+ eifp->if_dname = "ef";
+ eifp->if_dunit = IF_DUNIT_NONE;
+ eifp->if_softc = efp;
+ if (ifp->if_ioctl)
+ eifp->if_ioctl = ef_ioctl;
+ efl->el_units[ft] = efp;
+ return 0;
+}
+
+static int
+ef_load(void)
+{
+ VNET_ITERATOR_DECL(vnet_iter);
+ struct ifnet *ifp;
+ struct efnet *efp;
+ struct ef_link *efl = NULL, *efl_temp;
+ int error = 0, d;
+
+ VNET_LIST_RLOCK();
+ VNET_FOREACH(vnet_iter) {
+ CURVNET_SET(vnet_iter);
+
+ /*
+ * XXXRW: The following loop walks the ifnet list while
+ * modifying it, something not well-supported by ifnet
+ * locking. To avoid lock upgrade/recursion issues, manually
+ * acquire a write lock of ifnet_sxlock here, rather than a
+ * read lock, so that when if_alloc() recurses the lock, we
+ * don't panic. This structure, in which if_ef automatically
+ * attaches to all ethernet interfaces, should be replaced
+ * with a model like that found in if_vlan, in which
+ * interfaces are explicitly configured, which would avoid
+ * this (and other) problems.
+ */
+ sx_xlock(&ifnet_sxlock);
+ TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
+ if (ifp->if_type != IFT_ETHER) continue;
+ EFDEBUG("Found interface %s\n", ifp->if_xname);
+ efl = (struct ef_link*)malloc(sizeof(struct ef_link),
+ M_IFADDR, M_WAITOK | M_ZERO);
+ if (efl == NULL) {
+ error = ENOMEM;
+ break;
+ }
+
+ 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);
+ }
+ sx_xunlock(&ifnet_sxlock);
+ CURVNET_RESTORE();
+ }
+ VNET_LIST_RUNLOCK();
+ if (error) {
+ if (efl)
+ SLIST_INSERT_HEAD(&efdev, efl, el_next);
+ SLIST_FOREACH_SAFE(efl, &efdev, el_next, efl_temp) {
+ for (d = 0; d < EF_NFT; d++)
+ if (efl->el_units[d]) {
+ if (efl->el_units[d]->ef_pifp != NULL)
+ if_free(efl->el_units[d]->ef_pifp);
+ 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:
+ return EOPNOTSUPP;
+ }
+ 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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-18 15:53:01 +0000