2 * Copyright (c) 1999, 2000 Boris Popov
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/sockio.h>
36 #include <sys/malloc.h>
38 #include <sys/socket.h>
39 #include <sys/syslog.h>
40 #include <sys/kernel.h>
41 #include <sys/module.h>
43 #include <net/ethernet.h>
44 #include <net/if_llc.h>
46 #include <net/if_arp.h>
47 #include <net/if_dl.h>
48 #include <net/if_types.h>
49 #include <net/netisr.h>
50 #include <net/route.h>
54 #include <netinet/in.h>
55 #include <netinet/in_var.h>
56 #include <netinet/if_ether.h>
60 #include <netipx/ipx.h>
61 #include <netipx/ipx_if.h>
64 /* internal frame types */
65 #define ETHER_FT_EII 0 /* Ethernet_II - default */
66 #define ETHER_FT_8023 1 /* 802.3 (Novell) */
67 #define ETHER_FT_8022 2 /* 802.2 */
68 #define ETHER_FT_SNAP 3 /* SNAP */
69 #define EF_NFT 4 /* total number of frame types */
72 #define EFDEBUG(format, args...) printf("%s: "format, __func__ ,## args)
74 #define EFDEBUG(format, args...)
77 #define EFERROR(format, args...) printf("%s: "format, __func__ ,## args)
81 struct ifnet * ef_ifp;
86 SLIST_ENTRY(ef_link) el_next;
87 struct ifnet *el_ifp; /* raw device for this clones */
88 struct efnet *el_units[EF_NFT]; /* our clones */
91 static SLIST_HEAD(ef_link_head, ef_link) efdev = {NULL};
94 extern int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m);
95 extern int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
96 struct sockaddr *dst, short *tp, int *hlen);
99 static void ef_reset (struct ifnet *);
101 static int ef_attach(struct efnet *sc);
102 static int ef_detach(struct efnet *sc);
103 static void ef_init(void *);
104 static int ef_ioctl(struct ifnet *, u_long, caddr_t);
105 static void ef_start(struct ifnet *);
106 static int ef_input(struct ifnet*, struct ether_header *, struct mbuf *);
107 static int ef_output(struct ifnet *ifp, struct mbuf **mp,
108 struct sockaddr *dst, short *tp, int *hlen);
110 static int ef_load(void);
111 static int ef_unload(void);
114 * Install the interface, most of structure initialization done in ef_clone()
117 ef_attach(struct efnet *sc)
119 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
121 struct sockaddr_dl *sdl2;
123 ifp->if_start = ef_start;
124 ifp->if_watchdog = NULL;
125 ifp->if_init = ef_init;
126 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
127 ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
129 * Attach the interface
131 ifa2 = ifaddr_byindex(sc->ef_ifp->if_index);
132 sdl2 = (struct sockaddr_dl *)ifa2->ifa_addr;
133 ether_ifattach(ifp, LLADDR(sdl2));
135 ifp->if_resolvemulti = 0;
136 ifp->if_type = IFT_XETHER;
137 ifp->if_flags |= IFF_RUNNING;
139 bcopy(LLADDR(sdl2), sc->ef_ac.ac_enaddr, ETHER_ADDR_LEN);
141 EFDEBUG("%s: attached\n", ifp->if_xname);
146 * This is for _testing_only_, just removes interface from interfaces list
149 ef_detach(struct efnet *sc)
151 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
156 if (ifp->if_flags & IFF_UP) {
158 if (ifp->if_flags & IFF_RUNNING) {
159 /* find internet addresses and delete routes */
160 register struct ifaddr *ifa;
161 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
162 rtinit(ifa, (int)RTM_DELETE, 0);
167 TAILQ_REMOVE(&ifnet, ifp, if_link);
179 ef_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
181 struct efnet *sc = ifp->if_softc;
182 struct ifaddr *ifa = (struct ifaddr*)data;
185 EFDEBUG("IOCTL %ld for %s\n", cmd, ifp->if_xname);
193 if (sc->ef_frametype == ETHER_FT_8023 &&
194 ifa->ifa_addr->sa_family != AF_IPX) {
195 error = EAFNOSUPPORT;
198 ifp->if_flags |= IFF_UP;
201 error = ether_ioctl(ifp, cmd, data);
209 * Currently packet prepared in the ether_output(), but this can be a better
213 ef_start(struct ifnet *ifp)
215 struct efnet *sc = (struct efnet*)ifp->if_softc;
220 ifp->if_flags |= IFF_OACTIVE;
225 IF_DEQUEUE(&ifp->if_snd, m);
229 IFQ_HANDOFF(p, m, error);
236 ifp->if_flags &= ~IFF_OACTIVE;
241 * Inline functions do not put additional overhead to procedure call or
242 * parameter passing but simplify the code
245 ef_inputEII(struct mbuf *m, struct ether_header *eh, u_short ether_type)
257 if (ip_fastforward(m))
267 return (EPROTONOSUPPORT);
269 netisr_dispatch(isr, m);
274 ef_inputSNAP(struct mbuf *m, struct ether_header *eh, struct llc* l,
287 return (EPROTONOSUPPORT);
289 netisr_dispatch(isr, m);
294 ef_input8022(struct mbuf *m, struct ether_header *eh, struct llc* l,
307 return (EPROTONOSUPPORT);
309 netisr_dispatch(isr, m);
314 * Called from ether_input()
317 ef_input(struct ifnet *ifp, struct ether_header *eh, struct mbuf *m)
327 ether_type = ntohs(eh->ether_type);
329 if (ether_type < ETHERMTU) {
330 l = mtod(m, struct llc*);
331 if (l->llc_dsap == 0xff && l->llc_ssap == 0xff) {
333 * Novell's "802.3" frame
336 } else if (l->llc_dsap == 0xaa && l->llc_ssap == 0xaa) {
341 ether_type = ntohs(l->llc_un.type_snap.ether_type);
342 } else if (l->llc_dsap == l->llc_ssap) {
347 ether_type = l->llc_ssap;
353 EFDEBUG("Unrecognised ether_type %x\n", ether_type);
354 return EPROTONOSUPPORT;
358 * Check if interface configured for the given frame
361 SLIST_FOREACH(efl, &efdev, el_next) {
362 if (efl->el_ifp == ifp) {
363 efp = efl->el_units[ft];
368 EFDEBUG("Can't find if for %d\n", ft);
369 return EPROTONOSUPPORT;
371 eifp = &efp->ef_ac.ac_if;
372 if ((eifp->if_flags & IFF_UP) == 0)
373 return EPROTONOSUPPORT;
374 eifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
375 m->m_pkthdr.rcvif = eifp;
377 BPF_MTAP2(eifp, eh, ETHER_HDR_LEN, m);
379 * Now we ready to adjust mbufs and pass them to protocol intr's
383 return (ef_inputEII(m, eh, ether_type));
385 case ETHER_FT_8023: /* only IPX can be here */
390 return (ef_inputSNAP(m, eh, l, ether_type));
392 return (ef_input8022(m, eh, l, ether_type));
394 EFDEBUG("No support for frame %d and proto %04x\n",
396 return (EPROTONOSUPPORT);
398 netisr_dispatch(isr, m);
403 ef_output(struct ifnet *ifp, struct mbuf **mp, struct sockaddr *dst, short *tp,
406 struct efnet *sc = (struct efnet*)ifp->if_softc;
407 struct mbuf *m = *mp;
411 if (ifp->if_type != IFT_XETHER)
413 switch (sc->ef_frametype) {
416 type = htons(ETHERTYPE_IPX);
422 type = htons(m->m_pkthdr.len);
425 M_PREPEND(m, ETHER_HDR_LEN + 3, M_TRYWAIT);
431 * Ensure that ethernet header and next three bytes
432 * will fit into single mbuf
434 m = m_pullup(m, ETHER_HDR_LEN + 3);
439 m_adj(m, ETHER_HDR_LEN);
440 type = htons(m->m_pkthdr.len);
441 cp = mtod(m, u_char *);
448 M_PREPEND(m, 8, M_TRYWAIT);
453 type = htons(m->m_pkthdr.len);
454 cp = mtod(m, u_char *);
455 bcopy("\xAA\xAA\x03\x00\x00\x00\x81\x37", cp, 8);
467 * Create clone from the given interface
470 ef_clone(struct ef_link *efl, int ft)
474 struct ifnet *ifp = efl->el_ifp;
476 efp = (struct efnet*)malloc(sizeof(struct efnet), M_IFADDR,
481 efp->ef_frametype = ft;
482 eifp = &efp->ef_ac.ac_if;
483 snprintf(eifp->if_xname, IFNAMSIZ,
484 "%sf%d", ifp->if_xname, efp->ef_frametype);
485 eifp->if_dname = "ef";
486 eifp->if_dunit = IF_DUNIT_NONE;
487 eifp->if_softc = efp;
489 eifp->if_ioctl = ef_ioctl;
490 efl->el_units[ft] = efp;
499 struct ef_link *efl = NULL;
503 TAILQ_FOREACH(ifp, &ifnet, if_link) {
504 if (ifp->if_type != IFT_ETHER) continue;
505 EFDEBUG("Found interface %s\n", ifp->if_xname);
506 efl = (struct ef_link*)malloc(sizeof(struct ef_link),
507 M_IFADDR, M_WAITOK | M_ZERO);
515 error = ef_clone(efl, ETHER_FT_EII);
519 error = ef_clone(efl, ETHER_FT_8023);
523 error = ef_clone(efl, ETHER_FT_8022);
527 error = ef_clone(efl, ETHER_FT_SNAP);
531 SLIST_INSERT_HEAD(&efdev, efl, el_next);
536 SLIST_INSERT_HEAD(&efdev, efl, el_next);
537 SLIST_FOREACH(efl, &efdev, el_next) {
538 for (d = 0; d < EF_NFT; d++)
539 if (efl->el_units[d])
540 free(efl->el_units[d], M_IFADDR);
545 SLIST_FOREACH(efl, &efdev, el_next) {
546 for (d = 0; d < EF_NFT; d++) {
547 efp = efl->el_units[d];
552 ef_inputp = ef_input;
553 ef_outputp = ef_output;
567 SLIST_FOREACH(efl, &efdev, el_next) {
568 for (d = 0; d < EF_NFT; d++) {
569 efp = efl->el_units[d];
575 EFDEBUG("Unloaded\n");
580 if_ef_modevent(module_t mod, int type, void *data)
582 switch ((modeventtype_t)type) {
593 static moduledata_t if_ef_mod = {
594 "if_ef", if_ef_modevent, NULL
597 DECLARE_MODULE(if_ef, if_ef_mod, SI_SUB_PSEUDO, SI_ORDER_MIDDLE);