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 /* internal frame types */
66 #define ETHER_FT_EII 0 /* Ethernet_II - default */
67 #define ETHER_FT_8023 1 /* 802.3 (Novell) */
68 #define ETHER_FT_8022 2 /* 802.2 */
69 #define ETHER_FT_SNAP 3 /* SNAP */
70 #define EF_NFT 4 /* total number of frame types */
73 #define EFDEBUG(format, args...) kprintf("%s: "format, __func__ ,## args)
75 #define EFDEBUG(format, args...)
78 #define EFERROR(format, args...) kprintf("%s: "format, __func__ ,## args)
82 struct ifnet * ef_ifp;
87 SLIST_ENTRY(ef_link) el_next;
88 struct ifnet *el_ifp; /* raw device for this clones */
89 struct efnet *el_units[EF_NFT]; /* our clones */
92 static SLIST_HEAD(ef_link_head, ef_link) efdev = {NULL};
95 extern int (*ef_inputp)(struct ifnet*, const struct ether_header *eh,
97 extern int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
98 struct sockaddr *dst, short *tp, int *hlen);
101 static void ef_reset (struct ifnet *);
103 static int ef_attach(struct efnet *sc);
104 static int ef_detach(struct efnet *sc);
105 static void ef_init(void *);
106 static int ef_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
107 static void ef_start(struct ifnet *);
108 static int ef_input(struct ifnet*, const struct ether_header *, struct mbuf *);
109 static int ef_output(struct ifnet *ifp, struct mbuf **mp,
110 struct sockaddr *dst, short *tp, int *hlen);
112 static int ef_load(void);
113 static int ef_unload(void);
116 * Install the interface, most of structure initialization done in ef_clone()
119 ef_attach(struct efnet *sc)
121 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
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 ether_ifattach(ifp, IF_LLADDR(sc->ef_ifp), NULL);
133 ifp->if_resolvemulti = 0;
134 ifp->if_type = IFT_XETHER;
135 ifp->if_flags |= IFF_RUNNING;
137 EFDEBUG("%s: attached\n", ifp->if_xname);
142 * This is for _testing_only_, just removes interface from interfaces list
145 ef_detach(struct efnet *sc)
147 ether_ifdetach(&sc->ef_ac.ac_if);
152 ef_init(void *foo __unused)
157 ef_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
159 struct efnet *sc = ifp->if_softc;
160 struct ifaddr *ifa = (struct ifaddr*)data;
163 EFDEBUG("IOCTL %ld for %s\n", cmd, ifp->if_xname);
168 if (sc->ef_frametype == ETHER_FT_8023 &&
169 ifa->ifa_addr->sa_family != AF_IPX) {
170 error = EAFNOSUPPORT;
173 ifp->if_flags |= IFF_UP;
177 error = ether_ioctl(ifp, cmd, data);
190 * Currently packet prepared in the ether_output(), but this can be a better
194 ef_start(struct ifnet *ifp)
196 struct efnet *sc = (struct efnet*)ifp->if_softc;
200 ifp->if_flags |= IFF_OACTIVE;
205 IF_DEQUEUE(&ifp->if_snd, m);
209 if (IF_QFULL(&p->if_snd)) {
215 IF_ENQUEUE(&p->if_snd, m);
216 if ((p->if_flags & IFF_OACTIVE) == 0) {
221 ifp->if_flags &= ~IFF_OACTIVE;
226 * Inline functions do not put additional overhead to procedure call or
227 * parameter passing but simplify the code
230 ef_inputEII(struct mbuf *m, struct llc* l, u_short ether_type)
243 if (ipflow_fastforward(m))
253 return (EPROTONOSUPPORT);
255 netisr_queue(isr, m);
260 ef_inputSNAP(struct mbuf *m, struct llc* l, u_short ether_type)
272 return (EPROTONOSUPPORT);
274 netisr_queue(isr, m);
279 ef_input8022(struct mbuf *m, struct llc* l, u_short ether_type)
291 return (EPROTONOSUPPORT);
293 netisr_queue(isr, m);
298 * Called from ether_input()
301 ef_input(struct ifnet *ifp, const struct ether_header *eh, struct mbuf *m)
311 ether_type = ntohs(eh->ether_type);
312 if (ether_type < ETHERMTU) {
313 l = mtod(m, struct llc*);
314 if (l->llc_dsap == 0xff && l->llc_ssap == 0xff) {
316 * Novell's "802.3" frame
319 } else if (l->llc_dsap == 0xaa && l->llc_ssap == 0xaa) {
324 ether_type = ntohs(l->llc_un.type_snap.ether_type);
325 } else if (l->llc_dsap == l->llc_ssap) {
330 ether_type = l->llc_ssap;
336 EFDEBUG("Unrecognised ether_type %x\n", ether_type);
337 return EPROTONOSUPPORT;
341 * Check if interface configured for the given frame
344 SLIST_FOREACH(efl, &efdev, el_next) {
345 if (efl->el_ifp == ifp) {
346 efp = efl->el_units[ft];
351 EFDEBUG("Can't find if for %d\n", ft);
352 return EPROTONOSUPPORT;
354 eifp = &efp->ef_ac.ac_if;
355 if ((eifp->if_flags & IFF_UP) == 0)
356 return EPROTONOSUPPORT;
357 eifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
358 m->m_pkthdr.rcvif = eifp;
361 bpf_ptap(eifp->if_bpf, m, eh, ETHER_HDR_LEN);
364 * Now we ready to adjust mbufs and pass them to protocol intr's
368 return (ef_inputEII(m, l, ether_type));
371 case ETHER_FT_8023: /* only IPX can be here */
376 return (ef_inputSNAP(m, l, ether_type));
379 return (ef_input8022(m, l, ether_type));
382 EFDEBUG("No support for frame %d and proto %04x\n",
384 return (EPROTONOSUPPORT);
386 netisr_queue(isr, m);
391 ef_output(struct ifnet *ifp, struct mbuf **mp, struct sockaddr *dst, short *tp,
394 struct efnet *sc = (struct efnet*)ifp->if_softc;
395 struct mbuf *m = *mp;
399 if (ifp->if_type != IFT_XETHER)
401 switch (sc->ef_frametype) {
404 type = htons(ETHERTYPE_IPX);
410 type = htons(m->m_pkthdr.len);
413 M_PREPEND(m, ETHER_HDR_LEN + 3, MB_WAIT);
419 * Ensure that ethernet header and next three bytes
420 * will fit into single mbuf
422 m = m_pullup(m, ETHER_HDR_LEN + 3);
427 m_adj(m, ETHER_HDR_LEN);
428 type = htons(m->m_pkthdr.len);
429 cp = mtod(m, u_char *);
436 M_PREPEND(m, 8, MB_WAIT);
441 type = htons(m->m_pkthdr.len);
442 cp = mtod(m, u_char *);
443 bcopy("\xAA\xAA\x03\x00\x00\x00\x81\x37", cp, 8);
455 * Create clone from the given interface
458 ef_clone(struct ef_link *efl, int ft)
462 struct ifnet *ifp = efl->el_ifp;
464 efp = (struct efnet*)kmalloc(sizeof(struct efnet), M_IFADDR,
467 efp->ef_frametype = ft;
468 eifp = &efp->ef_ac.ac_if;
469 ksnprintf(eifp->if_xname, IFNAMSIZ,
470 "%sf%d", ifp->if_xname, efp->ef_frametype);
471 eifp->if_dname = "ef";
472 eifp->if_dunit = IF_DUNIT_NONE;
473 eifp->if_softc = efp;
475 eifp->if_ioctl = ef_ioctl;
476 efl->el_units[ft] = efp;
485 struct ef_link *efl = NULL;
488 TAILQ_FOREACH(ifp, &ifnet, if_link) {
489 if (ifp->if_type != IFT_ETHER) continue;
490 EFDEBUG("Found interface %s\n", ifp->if_xname);
491 efl = (struct ef_link*)kmalloc(sizeof(struct ef_link),
492 M_IFADDR, M_WAITOK | M_ZERO);
496 error = ef_clone(efl, ETHER_FT_EII);
500 error = ef_clone(efl, ETHER_FT_8023);
504 error = ef_clone(efl, ETHER_FT_8022);
508 error = ef_clone(efl, ETHER_FT_SNAP);
512 SLIST_INSERT_HEAD(&efdev, efl, el_next);
516 SLIST_INSERT_HEAD(&efdev, efl, el_next);
517 SLIST_FOREACH(efl, &efdev, el_next) {
518 for (d = 0; d < EF_NFT; d++)
519 if (efl->el_units[d])
520 kfree(efl->el_units[d], M_IFADDR);
521 kfree(efl, M_IFADDR);
525 SLIST_FOREACH(efl, &efdev, el_next) {
526 for (d = 0; d < EF_NFT; d++) {
527 efp = efl->el_units[d];
532 ef_inputp = ef_input;
533 ef_outputp = ef_output;
547 SLIST_FOREACH(efl, &efdev, el_next) {
548 for (d = 0; d < EF_NFT; d++) {
549 efp = efl->el_units[d];
555 EFDEBUG("Unloaded\n");
560 if_ef_modevent(module_t mod, int type, void *data)
562 switch ((modeventtype_t)type) {
573 static moduledata_t if_ef_mod = {
574 "if_ef", if_ef_modevent, NULL
577 DECLARE_MODULE(if_ef, if_ef_mod, SI_SUB_PSEUDO, SI_ORDER_MIDDLE);