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 1.25 2008/01/06 16:55:52 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*, const struct ether_header *eh,
98 extern int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
99 struct sockaddr *dst, short *tp, int *hlen);
102 static void ef_reset (struct ifnet *);
104 static int ef_attach(struct efnet *sc);
105 static int ef_detach(struct efnet *sc);
106 static void ef_init(void *);
107 static int ef_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
108 static void ef_start(struct ifnet *);
109 static int ef_input(struct ifnet*, const struct ether_header *, struct mbuf *);
110 static int ef_output(struct ifnet *ifp, struct mbuf **mp,
111 struct sockaddr *dst, short *tp, int *hlen);
113 static int ef_load(void);
114 static int ef_unload(void);
117 * Install the interface, most of structure initialization done in ef_clone()
120 ef_attach(struct efnet *sc)
122 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
124 ifp->if_start = ef_start;
125 ifp->if_watchdog = NULL;
126 ifp->if_init = ef_init;
127 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
128 ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
130 * Attach the interface
132 ether_ifattach(ifp, IF_LLADDR(sc->ef_ifp), NULL);
134 ifp->if_resolvemulti = 0;
135 ifp->if_type = IFT_XETHER;
136 ifp->if_flags |= IFF_RUNNING;
138 EFDEBUG("%s: attached\n", ifp->if_xname);
143 * This is for _testing_only_, just removes interface from interfaces list
146 ef_detach(struct efnet *sc)
148 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
152 if (ifp->if_flags & IFF_UP) {
154 if (ifp->if_flags & IFF_RUNNING) {
155 /* find internet addresses and delete routes */
157 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
158 rtinit(ifa, (int)RTM_DELETE, 0);
163 TAILQ_REMOVE(&ifnet, ifp, if_link);
174 ef_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
176 struct efnet *sc = ifp->if_softc;
177 struct ifaddr *ifa = (struct ifaddr*)data;
180 EFDEBUG("IOCTL %ld for %s\n", cmd, ifp->if_xname);
185 if (sc->ef_frametype == ETHER_FT_8023 &&
186 ifa->ifa_addr->sa_family != AF_IPX) {
187 error = EAFNOSUPPORT;
190 ifp->if_flags |= IFF_UP;
194 error = ether_ioctl(ifp, cmd, data);
207 * Currently packet prepared in the ether_output(), but this can be a better
211 ef_start(struct ifnet *ifp)
213 struct efnet *sc = (struct efnet*)ifp->if_softc;
217 ifp->if_flags |= IFF_OACTIVE;
222 IF_DEQUEUE(&ifp->if_snd, m);
226 if (IF_QFULL(&p->if_snd)) {
232 IF_ENQUEUE(&p->if_snd, m);
233 if ((p->if_flags & IFF_OACTIVE) == 0) {
238 ifp->if_flags &= ~IFF_OACTIVE;
243 * Inline functions do not put additional overhead to procedure call or
244 * parameter passing but simplify the code
247 ef_inputEII(struct mbuf *m, struct llc* l, u_short ether_type)
259 if (ipflow_fastforward(m, NULL))
268 return (EPROTONOSUPPORT);
270 netisr_dispatch(isr, m);
275 ef_inputSNAP(struct mbuf *m, struct llc* l, u_short ether_type)
287 return (EPROTONOSUPPORT);
289 netisr_dispatch(isr, m);
294 ef_input8022(struct mbuf *m, struct llc* l, u_short ether_type)
306 return (EPROTONOSUPPORT);
308 netisr_dispatch(isr, m);
313 * Called from ether_input()
316 ef_input(struct ifnet *ifp, const struct ether_header *eh, struct mbuf *m)
326 ether_type = ntohs(eh->ether_type);
327 if (ether_type < ETHERMTU) {
328 l = mtod(m, struct llc*);
329 if (l->llc_dsap == 0xff && l->llc_ssap == 0xff) {
331 * Novell's "802.3" frame
334 } else if (l->llc_dsap == 0xaa && l->llc_ssap == 0xaa) {
339 ether_type = ntohs(l->llc_un.type_snap.ether_type);
340 } else if (l->llc_dsap == l->llc_ssap) {
345 ether_type = l->llc_ssap;
351 EFDEBUG("Unrecognised ether_type %x\n", ether_type);
352 return EPROTONOSUPPORT;
356 * Check if interface configured for the given frame
359 SLIST_FOREACH(efl, &efdev, el_next) {
360 if (efl->el_ifp == ifp) {
361 efp = efl->el_units[ft];
366 EFDEBUG("Can't find if for %d\n", ft);
367 return EPROTONOSUPPORT;
369 eifp = &efp->ef_ac.ac_if;
370 if ((eifp->if_flags & IFF_UP) == 0)
371 return EPROTONOSUPPORT;
372 eifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
373 m->m_pkthdr.rcvif = eifp;
376 bpf_ptap(eifp->if_bpf, m, eh, ETHER_HDR_LEN);
379 * Now we ready to adjust mbufs and pass them to protocol intr's
383 return (ef_inputEII(m, l, ether_type));
386 case ETHER_FT_8023: /* only IPX can be here */
391 return (ef_inputSNAP(m, l, ether_type));
394 return (ef_input8022(m, l, ether_type));
397 EFDEBUG("No support for frame %d and proto %04x\n",
399 return (EPROTONOSUPPORT);
401 netisr_dispatch(isr, m);
406 ef_output(struct ifnet *ifp, struct mbuf **mp, struct sockaddr *dst, short *tp,
409 struct efnet *sc = (struct efnet*)ifp->if_softc;
410 struct mbuf *m = *mp;
414 if (ifp->if_type != IFT_XETHER)
416 switch (sc->ef_frametype) {
419 type = htons(ETHERTYPE_IPX);
425 type = htons(m->m_pkthdr.len);
428 M_PREPEND(m, ETHER_HDR_LEN + 3, MB_WAIT);
434 * Ensure that ethernet header and next three bytes
435 * will fit into single mbuf
437 m = m_pullup(m, ETHER_HDR_LEN + 3);
442 m_adj(m, ETHER_HDR_LEN);
443 type = htons(m->m_pkthdr.len);
444 cp = mtod(m, u_char *);
451 M_PREPEND(m, 8, MB_WAIT);
456 type = htons(m->m_pkthdr.len);
457 cp = mtod(m, u_char *);
458 bcopy("\xAA\xAA\x03\x00\x00\x00\x81\x37", cp, 8);
470 * Create clone from the given interface
473 ef_clone(struct ef_link *efl, int ft)
477 struct ifnet *ifp = efl->el_ifp;
479 efp = (struct efnet*)kmalloc(sizeof(struct efnet), M_IFADDR,
482 efp->ef_frametype = ft;
483 eifp = &efp->ef_ac.ac_if;
484 ksnprintf(eifp->if_xname, IFNAMSIZ,
485 "%sf%d", ifp->if_xname, efp->ef_frametype);
486 eifp->if_dname = "ef";
487 eifp->if_dunit = IF_DUNIT_NONE;
488 eifp->if_softc = efp;
490 eifp->if_ioctl = ef_ioctl;
491 efl->el_units[ft] = efp;
500 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*)kmalloc(sizeof(struct ef_link),
507 M_IFADDR, M_WAITOK | M_ZERO);
511 error = ef_clone(efl, ETHER_FT_EII);
515 error = ef_clone(efl, ETHER_FT_8023);
519 error = ef_clone(efl, ETHER_FT_8022);
523 error = ef_clone(efl, ETHER_FT_SNAP);
527 SLIST_INSERT_HEAD(&efdev, efl, el_next);
531 SLIST_INSERT_HEAD(&efdev, efl, el_next);
532 SLIST_FOREACH(efl, &efdev, el_next) {
533 for (d = 0; d < EF_NFT; d++)
534 if (efl->el_units[d])
535 kfree(efl->el_units[d], M_IFADDR);
536 kfree(efl, M_IFADDR);
540 SLIST_FOREACH(efl, &efdev, el_next) {
541 for (d = 0; d < EF_NFT; d++) {
542 efp = efl->el_units[d];
547 ef_inputp = ef_input;
548 ef_outputp = ef_output;
562 SLIST_FOREACH(efl, &efdev, el_next) {
563 for (d = 0; d < EF_NFT; d++) {
564 efp = efl->el_units[d];
570 EFDEBUG("Unloaded\n");
575 if_ef_modevent(module_t mod, int type, void *data)
577 switch ((modeventtype_t)type) {
588 static moduledata_t if_ef_mod = {
589 "if_ef", if_ef_modevent, NULL
592 DECLARE_MODULE(if_ef, if_ef_mod, SI_SUB_PSEUDO, SI_ORDER_MIDDLE);