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 $
27 * $DragonFly: src/sys/net/ef/if_ef.c,v 1.22 2006/12/22 23:44:55 swildner Exp $
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/sockio.h>
37 #include <sys/malloc.h>
39 #include <sys/socket.h>
40 #include <sys/syslog.h>
41 #include <sys/kernel.h>
42 #include <sys/module.h>
43 #include <sys/thread2.h>
45 #include <net/ethernet.h>
46 #include <net/if_llc.h>
48 #include <net/if_arp.h>
49 #include <net/if_dl.h>
50 #include <net/if_types.h>
51 #include <net/netisr.h>
52 #include <net/route.h>
56 #include <netinet/in.h>
57 #include <netinet/in_var.h>
58 #include <netinet/if_ether.h>
62 #include <netproto/ipx/ipx.h>
63 #include <netproto/ipx/ipx_if.h>
66 /* internal frame types */
67 #define ETHER_FT_EII 0 /* Ethernet_II - default */
68 #define ETHER_FT_8023 1 /* 802.3 (Novell) */
69 #define ETHER_FT_8022 2 /* 802.2 */
70 #define ETHER_FT_SNAP 3 /* SNAP */
71 #define EF_NFT 4 /* total number of frame types */
74 #define EFDEBUG(format, args...) kprintf("%s: "format, __func__ ,## args)
76 #define EFDEBUG(format, args...)
79 #define EFERROR(format, args...) kprintf("%s: "format, __func__ ,## args)
83 struct ifnet * ef_ifp;
88 SLIST_ENTRY(ef_link) el_next;
89 struct ifnet *el_ifp; /* raw device for this clones */
90 struct efnet *el_units[EF_NFT]; /* our clones */
93 static SLIST_HEAD(ef_link_head, ef_link) efdev = {NULL};
96 extern int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m);
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*, 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 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
151 if (ifp->if_flags & IFF_UP) {
153 if (ifp->if_flags & IFF_RUNNING) {
154 /* find internet addresses and delete routes */
156 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
157 rtinit(ifa, (int)RTM_DELETE, 0);
162 TAILQ_REMOVE(&ifnet, ifp, if_link);
173 ef_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
175 struct efnet *sc = ifp->if_softc;
176 struct ifaddr *ifa = (struct ifaddr*)data;
179 EFDEBUG("IOCTL %ld for %s\n", cmd, ifp->if_xname);
184 if (sc->ef_frametype == ETHER_FT_8023 &&
185 ifa->ifa_addr->sa_family != AF_IPX) {
186 error = EAFNOSUPPORT;
189 ifp->if_flags |= IFF_UP;
193 error = ether_ioctl(ifp, cmd, data);
206 * Currently packet prepared in the ether_output(), but this can be a better
210 ef_start(struct ifnet *ifp)
212 struct efnet *sc = (struct efnet*)ifp->if_softc;
216 ifp->if_flags |= IFF_OACTIVE;
221 IF_DEQUEUE(&ifp->if_snd, m);
225 if (IF_QFULL(&p->if_snd)) {
231 IF_ENQUEUE(&p->if_snd, m);
232 if ((p->if_flags & IFF_OACTIVE) == 0) {
237 ifp->if_flags &= ~IFF_OACTIVE;
242 * Inline functions do not put additional overhead to procedure call or
243 * parameter passing but simplify the code
246 ef_inputEII(struct mbuf *m, struct ether_header *eh, struct llc* l,
259 if (ipflow_fastforward(m, NULL))
268 return (EPROTONOSUPPORT);
270 netisr_dispatch(isr, m);
275 ef_inputSNAP(struct mbuf *m, struct ether_header *eh, struct llc* l,
288 return (EPROTONOSUPPORT);
290 netisr_dispatch(isr, m);
295 ef_input8022(struct mbuf *m, struct ether_header *eh, struct llc* l,
308 return (EPROTONOSUPPORT);
310 netisr_dispatch(isr, m);
315 * Called from ether_input()
318 ef_input(struct ifnet *ifp, struct ether_header *eh, struct mbuf *m)
328 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;
378 bpf_ptap(eifp->if_bpf, m, eh, ETHER_HDR_LEN);
381 * Now we ready to adjust mbufs and pass them to protocol intr's
385 return (ef_inputEII(m, eh, l, ether_type));
388 case ETHER_FT_8023: /* only IPX can be here */
393 return (ef_inputSNAP(m, eh, l, ether_type));
396 return (ef_input8022(m, eh, l, ether_type));
399 EFDEBUG("No support for frame %d and proto %04x\n",
401 return (EPROTONOSUPPORT);
403 netisr_dispatch(isr, m);
408 ef_output(struct ifnet *ifp, struct mbuf **mp, struct sockaddr *dst, short *tp,
411 struct efnet *sc = (struct efnet*)ifp->if_softc;
412 struct mbuf *m = *mp;
416 if (ifp->if_type != IFT_XETHER)
418 switch (sc->ef_frametype) {
421 type = htons(ETHERTYPE_IPX);
427 type = htons(m->m_pkthdr.len);
430 M_PREPEND(m, ETHER_HDR_LEN + 3, MB_WAIT);
436 * Ensure that ethernet header and next three bytes
437 * will fit into single mbuf
439 m = m_pullup(m, ETHER_HDR_LEN + 3);
444 m_adj(m, ETHER_HDR_LEN);
445 type = htons(m->m_pkthdr.len);
446 cp = mtod(m, u_char *);
453 M_PREPEND(m, 8, MB_WAIT);
458 type = htons(m->m_pkthdr.len);
459 cp = mtod(m, u_char *);
460 bcopy("\xAA\xAA\x03\x00\x00\x00\x81\x37", cp, 8);
472 * Create clone from the given interface
475 ef_clone(struct ef_link *efl, int ft)
479 struct ifnet *ifp = efl->el_ifp;
481 efp = (struct efnet*)kmalloc(sizeof(struct efnet), M_IFADDR,
486 efp->ef_frametype = ft;
487 eifp = &efp->ef_ac.ac_if;
488 ksnprintf(eifp->if_xname, IFNAMSIZ,
489 "%sf%d", ifp->if_xname, efp->ef_frametype);
490 eifp->if_dname = "ef";
491 eifp->if_dunit = IF_DUNIT_NONE;
492 eifp->if_softc = efp;
494 eifp->if_ioctl = ef_ioctl;
495 efl->el_units[ft] = efp;
504 struct ef_link *efl = NULL;
507 TAILQ_FOREACH(ifp, &ifnet, if_link) {
508 if (ifp->if_type != IFT_ETHER) continue;
509 EFDEBUG("Found interface %s\n", ifp->if_xname);
510 efl = (struct ef_link*)kmalloc(sizeof(struct ef_link),
516 bzero(efl, sizeof(*efl));
520 error = ef_clone(efl, ETHER_FT_EII);
524 error = ef_clone(efl, ETHER_FT_8023);
528 error = ef_clone(efl, ETHER_FT_8022);
532 error = ef_clone(efl, ETHER_FT_SNAP);
536 SLIST_INSERT_HEAD(&efdev, efl, el_next);
540 SLIST_INSERT_HEAD(&efdev, efl, el_next);
541 SLIST_FOREACH(efl, &efdev, el_next) {
542 for (d = 0; d < EF_NFT; d++)
543 if (efl->el_units[d])
544 kfree(efl->el_units[d], M_IFADDR);
545 kfree(efl, M_IFADDR);
549 SLIST_FOREACH(efl, &efdev, el_next) {
550 for (d = 0; d < EF_NFT; d++) {
551 efp = efl->el_units[d];
556 ef_inputp = ef_input;
557 ef_outputp = ef_output;
571 SLIST_FOREACH(efl, &efdev, el_next) {
572 for (d = 0; d < EF_NFT; d++) {
573 efp = efl->el_units[d];
579 EFDEBUG("Unloaded\n");
584 if_ef_modevent(module_t mod, int type, void *data)
586 switch ((modeventtype_t)type) {
597 static moduledata_t if_ef_mod = {
598 "if_ef", if_ef_modevent, NULL
601 DECLARE_MODULE(if_ef, if_ef_mod, SI_SUB_PSEUDO, SI_ORDER_MIDDLE);