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
26 * $FreeBSD: src/sys/net/if_ef.c,v 1.2.2.4 2001/02/22 09:27:04 bp Exp $
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>
42 #include <sys/thread2.h>
44 #include <net/ethernet.h>
45 #include <net/if_llc.h>
47 #include <net/if_arp.h>
48 #include <net/if_dl.h>
49 #include <net/if_types.h>
50 #include <net/netisr.h>
51 #include <net/route.h>
55 #include <netinet/in.h>
56 #include <netinet/in_var.h>
57 #include <netinet/if_ether.h>
61 #include <netproto/ipx/ipx.h>
62 #include <netproto/ipx/ipx_if.h>
65 /* If none of the supported layers is enabled explicitly enable them all */
66 #if !defined(ETHER_II) && !defined(ETHER_8023) && !defined(ETHER_8022) && \
74 /* internal frame types */
75 #define ETHER_FT_EII 0 /* Ethernet_II - default */
76 #define ETHER_FT_8023 1 /* 802.3 (Novell) */
77 #define ETHER_FT_8022 2 /* 802.2 */
78 #define ETHER_FT_SNAP 3 /* SNAP */
79 #define EF_NFT 4 /* total number of frame types */
82 #define EFDEBUG(format, args...) kprintf("%s: "format, __func__ ,## args)
84 #define EFDEBUG(format, args...)
87 #define EFERROR(format, args...) kprintf("%s: "format, __func__ ,## args)
91 struct ifnet * ef_ifp;
96 SLIST_ENTRY(ef_link) el_next;
97 struct ifnet *el_ifp; /* raw device for this clones */
98 struct efnet *el_units[EF_NFT]; /* our clones */
101 static SLIST_HEAD(ef_link_head, ef_link) efdev = {NULL};
104 extern int (*ef_inputp)(struct ifnet*, const struct ether_header *eh,
106 extern int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
107 struct sockaddr *dst, short *tp, int *hlen);
110 static void ef_reset (struct ifnet *);
112 static int ef_attach(struct efnet *sc);
113 static int ef_detach(struct efnet *sc);
114 static void ef_init(void *);
115 static int ef_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
116 static void ef_start(struct ifnet *);
117 static int ef_input(struct ifnet*, const struct ether_header *, struct mbuf *);
118 static int ef_output(struct ifnet *ifp, struct mbuf **mp,
119 struct sockaddr *dst, short *tp, int *hlen);
121 static int ef_load(void);
122 static int ef_unload(void);
125 * Install the interface, most of structure initialization done in ef_clone()
128 ef_attach(struct efnet *sc)
130 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
132 ifp->if_start = ef_start;
133 ifp->if_watchdog = NULL;
134 ifp->if_init = ef_init;
135 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
136 ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
138 * Attach the interface
140 ether_ifattach(ifp, IF_LLADDR(sc->ef_ifp), NULL);
142 ifp->if_resolvemulti = 0;
143 ifp->if_type = IFT_XETHER;
144 ifp->if_flags |= IFF_RUNNING;
146 EFDEBUG("%s: attached\n", ifp->if_xname);
151 * This is for _testing_only_, just removes interface from interfaces list
154 ef_detach(struct efnet *sc)
156 ether_ifdetach(&sc->ef_ac.ac_if);
161 ef_init(void *foo __unused)
166 ef_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
168 struct efnet *sc = ifp->if_softc;
169 struct ifaddr *ifa = (struct ifaddr*)data;
172 EFDEBUG("IOCTL %ld for %s\n", cmd, ifp->if_xname);
177 if (sc->ef_frametype == ETHER_FT_8023 &&
178 ifa->ifa_addr->sa_family != AF_IPX) {
179 error = EAFNOSUPPORT;
182 ifp->if_flags |= IFF_UP;
186 error = ether_ioctl(ifp, cmd, data);
199 * Currently packet prepared in the ether_output(), but this can be a better
203 ef_start(struct ifnet *ifp)
205 struct efnet *sc = (struct efnet*)ifp->if_softc;
209 ifp->if_flags |= IFF_OACTIVE;
214 IF_DEQUEUE(&ifp->if_snd, m);
218 if (IF_QFULL(&p->if_snd)) {
224 IF_ENQUEUE(&p->if_snd, m);
225 if ((p->if_flags & IFF_OACTIVE) == 0) {
230 ifp->if_flags &= ~IFF_OACTIVE;
235 * Inline functions do not put additional overhead to procedure call or
236 * parameter passing but simplify the code
239 ef_inputEII(struct mbuf *m, struct llc* l, u_short ether_type)
252 if (ipflow_fastforward(m))
262 return (EPROTONOSUPPORT);
264 netisr_queue(isr, m);
269 ef_inputSNAP(struct mbuf *m, struct llc* l, u_short ether_type)
281 return (EPROTONOSUPPORT);
283 netisr_queue(isr, m);
288 ef_input8022(struct mbuf *m, struct llc* l, u_short ether_type)
300 return (EPROTONOSUPPORT);
302 netisr_queue(isr, m);
307 * Called from ether_input()
310 ef_input(struct ifnet *ifp, const struct ether_header *eh, struct mbuf *m)
320 ether_type = ntohs(eh->ether_type);
321 if (ether_type < ETHERMTU) {
322 l = mtod(m, struct llc*);
323 if (l->llc_dsap == 0xff && l->llc_ssap == 0xff) {
325 * Novell's "802.3" frame
328 } else if (l->llc_dsap == 0xaa && l->llc_ssap == 0xaa) {
333 ether_type = ntohs(l->llc_un.type_snap.ether_type);
334 } else if (l->llc_dsap == l->llc_ssap) {
339 ether_type = l->llc_ssap;
345 EFDEBUG("Unrecognised ether_type %x\n", ether_type);
346 return EPROTONOSUPPORT;
350 * Check if interface configured for the given frame
353 SLIST_FOREACH(efl, &efdev, el_next) {
354 if (efl->el_ifp == ifp) {
355 efp = efl->el_units[ft];
360 EFDEBUG("Can't find if for %d\n", ft);
361 return EPROTONOSUPPORT;
363 eifp = &efp->ef_ac.ac_if;
364 if ((eifp->if_flags & IFF_UP) == 0)
365 return EPROTONOSUPPORT;
366 eifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
367 m->m_pkthdr.rcvif = eifp;
370 bpf_ptap(eifp->if_bpf, m, eh, ETHER_HDR_LEN);
373 * Now we ready to adjust mbufs and pass them to protocol intr's
377 return (ef_inputEII(m, l, ether_type));
380 case ETHER_FT_8023: /* only IPX can be here */
385 return (ef_inputSNAP(m, l, ether_type));
388 return (ef_input8022(m, l, ether_type));
391 EFDEBUG("No support for frame %d and proto %04x\n",
393 return (EPROTONOSUPPORT);
395 netisr_queue(isr, m);
400 ef_output(struct ifnet *ifp, struct mbuf **mp, struct sockaddr *dst, short *tp,
403 struct efnet *sc = (struct efnet*)ifp->if_softc;
404 struct mbuf *m = *mp;
408 if (ifp->if_type != IFT_XETHER)
410 switch (sc->ef_frametype) {
413 type = htons(ETHERTYPE_IPX);
419 type = htons(m->m_pkthdr.len);
422 M_PREPEND(m, ETHER_HDR_LEN + 3, MB_WAIT);
428 * Ensure that ethernet header and next three bytes
429 * will fit into single mbuf
431 m = m_pullup(m, ETHER_HDR_LEN + 3);
436 m_adj(m, ETHER_HDR_LEN);
437 type = htons(m->m_pkthdr.len);
438 cp = mtod(m, u_char *);
445 M_PREPEND(m, 8, MB_WAIT);
450 type = htons(m->m_pkthdr.len);
451 cp = mtod(m, u_char *);
452 bcopy("\xAA\xAA\x03\x00\x00\x00\x81\x37", cp, 8);
464 * Create clone from the given interface
467 ef_clone(struct ef_link *efl, int ft)
471 struct ifnet *ifp = efl->el_ifp;
473 efp = (struct efnet*)kmalloc(sizeof(struct efnet), M_IFADDR,
476 efp->ef_frametype = ft;
477 eifp = &efp->ef_ac.ac_if;
478 ksnprintf(eifp->if_xname, IFNAMSIZ,
479 "%sf%d", ifp->if_xname, efp->ef_frametype);
480 eifp->if_dname = "ef";
481 eifp->if_dunit = IF_DUNIT_NONE;
482 eifp->if_softc = efp;
484 eifp->if_ioctl = ef_ioctl;
485 efl->el_units[ft] = efp;
494 struct ef_link *efl = NULL;
497 TAILQ_FOREACH(ifp, &ifnet, if_link) {
498 if (ifp->if_type != IFT_ETHER) continue;
499 EFDEBUG("Found interface %s\n", ifp->if_xname);
500 efl = (struct ef_link*)kmalloc(sizeof(struct ef_link),
501 M_IFADDR, M_WAITOK | M_ZERO);
505 error = ef_clone(efl, ETHER_FT_EII);
509 error = ef_clone(efl, ETHER_FT_8023);
513 error = ef_clone(efl, ETHER_FT_8022);
517 error = ef_clone(efl, ETHER_FT_SNAP);
521 SLIST_INSERT_HEAD(&efdev, efl, el_next);
525 SLIST_INSERT_HEAD(&efdev, efl, el_next);
526 SLIST_FOREACH(efl, &efdev, el_next) {
527 for (d = 0; d < EF_NFT; d++)
528 if (efl->el_units[d])
529 kfree(efl->el_units[d], M_IFADDR);
530 kfree(efl, M_IFADDR);
534 SLIST_FOREACH(efl, &efdev, el_next) {
535 for (d = 0; d < EF_NFT; d++) {
536 efp = efl->el_units[d];
541 ef_inputp = ef_input;
542 ef_outputp = ef_output;
556 SLIST_FOREACH(efl, &efdev, el_next) {
557 for (d = 0; d < EF_NFT; d++) {
558 efp = efl->el_units[d];
564 EFDEBUG("Unloaded\n");
569 if_ef_modevent(module_t mod, int type, void *data)
571 switch ((modeventtype_t)type) {
582 static moduledata_t if_ef_mod = {
583 "if_ef", if_ef_modevent, NULL
586 DECLARE_MODULE(if_ef, if_ef_mod, SI_SUB_PSEUDO, SI_ORDER_MIDDLE);