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;
85 SLIST_ENTRY(ef_link) el_next;
86 struct ifnet *el_ifp; /* raw device for this clones */
87 struct efnet *el_units[EF_NFT]; /* our clones */
90 static SLIST_HEAD(ef_link_head, ef_link) efdev = {NULL};
93 extern int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m);
94 extern int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
95 struct sockaddr *dst, short *tp, int *hlen);
98 static void ef_reset (struct ifnet *);
100 static int ef_attach(struct efnet *sc);
101 static int ef_detach(struct efnet *sc);
102 static void ef_init(void *);
103 static int ef_ioctl(struct ifnet *, u_long, caddr_t);
104 static void ef_start(struct ifnet *);
105 static int ef_input(struct ifnet*, struct ether_header *, struct mbuf *);
106 static int ef_output(struct ifnet *ifp, struct mbuf **mp,
107 struct sockaddr *dst, short *tp, int *hlen);
109 static int ef_load(void);
110 static int ef_unload(void);
113 * Install the interface, most of structure initialization done in ef_clone()
116 ef_attach(struct efnet *sc)
118 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
119 struct ifaddr *ifa1, *ifa2;
120 struct sockaddr_dl *sdl1, *sdl2;
122 ifp->if_output = ether_output;
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, ETHER_BPF_SUPPORTED);
133 ifp->if_resolvemulti = 0;
134 ifp->if_type = IFT_XETHER;
135 ifp->if_flags |= IFF_RUNNING;
137 ifa1 = ifaddr_byindex(ifp->if_index);
138 ifa2 = ifaddr_byindex(sc->ef_ifp->if_index);
139 sdl1 = (struct sockaddr_dl *)ifa1->ifa_addr;
140 sdl2 = (struct sockaddr_dl *)ifa2->ifa_addr;
141 sdl1->sdl_type = IFT_ETHER;
142 sdl1->sdl_alen = ETHER_ADDR_LEN;
143 bcopy(LLADDR(sdl2), LLADDR(sdl1), ETHER_ADDR_LEN);
144 bcopy(LLADDR(sdl2), sc->ef_ac.ac_enaddr, ETHER_ADDR_LEN);
146 EFDEBUG("%s%d: attached\n", ifp->if_name, ifp->if_unit);
151 * This is for _testing_only_, just removes interface from interfaces list
154 ef_detach(struct efnet *sc)
156 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
161 if (ifp->if_flags & IFF_UP) {
163 if (ifp->if_flags & IFF_RUNNING) {
164 /* find internet addresses and delete routes */
165 register struct ifaddr *ifa;
166 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
167 rtinit(ifa, (int)RTM_DELETE, 0);
172 TAILQ_REMOVE(&ifnet, ifp, if_link);
183 ef_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
185 /* struct ef_link *sc = (struct ef_link*)ifp->if_softc;*/
186 struct ifaddr *ifa = (struct ifaddr*)data;
189 EFDEBUG("IOCTL %ld for %s%d\n", cmd, ifp->if_name, ifp->if_unit);
194 if (ifp->if_unit == ETHER_FT_8023 &&
195 ifa->ifa_addr->sa_family != AF_IPX) {
196 error = EAFNOSUPPORT;
199 ifp->if_flags |= IFF_UP;
203 error = ether_ioctl(ifp, cmd, data);
216 * Currently packet prepared in the ether_output(), but this can be a better
220 ef_start(struct ifnet *ifp)
222 struct efnet *sc = (struct efnet*)ifp->if_softc;
226 ifp->if_flags |= IFF_OACTIVE;
231 IF_DEQUEUE(&ifp->if_snd, m);
236 if (! IF_HANDOFF(&p->if_snd, m, p)) {
242 ifp->if_flags &= ~IFF_OACTIVE;
247 * Inline functions do not put additional overhead to procedure call or
248 * parameter passing but simplify the code
251 ef_inputEII(struct mbuf *m, struct ether_header *eh, struct llc* l,
252 u_short ether_type, struct ifqueue **inq)
257 schednetisr(NETISR_IPX);
263 if (ipflow_fastforward(m))
265 schednetisr(NETISR_IP);
270 schednetisr(NETISR_ARP);
275 return EPROTONOSUPPORT;
281 ef_inputSNAP(struct mbuf *m, struct ether_header *eh, struct llc* l,
282 u_short ether_type, struct ifqueue **inq)
288 schednetisr(NETISR_IPX);
293 return EPROTONOSUPPORT;
299 ef_input8022(struct mbuf *m, struct ether_header *eh, struct llc* l,
300 u_short ether_type, struct ifqueue **inq)
306 schednetisr(NETISR_IPX);
311 return EPROTONOSUPPORT;
316 * Called from ether_input()
319 ef_input(struct ifnet *ifp, struct ether_header *eh, struct mbuf *m)
329 ether_type = ntohs(eh->ether_type);
330 if (ether_type < ETHERMTU) {
331 l = mtod(m, struct llc*);
332 if (l->llc_dsap == 0xff && l->llc_ssap == 0xff) {
334 * Novell's "802.3" frame
337 } else if (l->llc_dsap == 0xaa && l->llc_ssap == 0xaa) {
342 ether_type = ntohs(l->llc_un.type_snap.ether_type);
343 } else if (l->llc_dsap == l->llc_ssap) {
348 ether_type = l->llc_ssap;
354 EFDEBUG("Unrecognised ether_type %x\n", ether_type);
355 return EPROTONOSUPPORT;
359 * Check if interface configured for the given frame
362 SLIST_FOREACH(efl, &efdev, el_next) {
363 if (efl->el_ifp == ifp) {
364 efp = efl->el_units[ft];
369 EFDEBUG("Can't find if for %d\n", ft);
370 return EPROTONOSUPPORT;
372 eifp = &efp->ef_ac.ac_if;
373 if ((eifp->if_flags & IFF_UP) == 0)
374 return EPROTONOSUPPORT;
375 eifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
376 m->m_pkthdr.rcvif = eifp;
381 m0.m_len = sizeof(struct ether_header);
382 m0.m_data = (char *)eh;
386 * Now we ready to adjust mbufs and pass them to protocol intr's
391 if (ef_inputEII(m, eh, l, ether_type, &inq) != 0)
392 return EPROTONOSUPPORT;
395 case ETHER_FT_8023: /* only IPX can be here */
396 schednetisr(NETISR_IPX);
401 if (ef_inputSNAP(m, eh, l, ether_type, &inq) != 0)
402 return EPROTONOSUPPORT;
405 if (ef_input8022(m, eh, l, ether_type, &inq) != 0)
406 return EPROTONOSUPPORT;
411 EFDEBUG("No support for frame %d and proto %04x\n",
413 return EPROTONOSUPPORT;
415 (void) IF_HANDOFF(inq, m, NULL);
420 ef_output(struct ifnet *ifp, struct mbuf **mp, struct sockaddr *dst, short *tp,
423 struct mbuf *m = *mp;
427 if (ifp->if_type != IFT_XETHER)
429 switch (ifp->if_unit) {
432 type = htons(ETHERTYPE_IPX);
438 type = htons(m->m_pkthdr.len);
441 M_PREPEND(m, ETHER_HDR_LEN + 3, M_TRYWAIT);
447 * Ensure that ethernet header and next three bytes
448 * will fit into single mbuf
450 m = m_pullup(m, ETHER_HDR_LEN + 3);
455 m_adj(m, ETHER_HDR_LEN);
456 type = htons(m->m_pkthdr.len);
457 cp = mtod(m, u_char *);
464 M_PREPEND(m, 8, M_TRYWAIT);
469 type = htons(m->m_pkthdr.len);
470 cp = mtod(m, u_char *);
471 bcopy("\xAA\xAA\x03\x00\x00\x00\x81\x37", cp, 8);
483 * Create clone from the given interface
486 ef_clone(struct ef_link *efl, int ft)
490 struct ifnet *ifp = efl->el_ifp;
491 char cbuf[IFNAMSIZ], *ifname;
494 efp = (struct efnet*)malloc(sizeof(struct efnet), M_IFADDR,
499 eifp = &efp->ef_ac.ac_if;
500 ifnlen = 1 + snprintf(cbuf, sizeof(cbuf), "%s%df", ifp->if_name,
502 ifname = (char*)malloc(ifnlen, M_IFADDR, M_WAITOK);
503 eifp->if_name = strcpy(ifname, cbuf);
505 eifp->if_softc = efp;
507 eifp->if_ioctl = ef_ioctl;
508 efl->el_units[ft] = efp;
517 struct ef_link *efl = NULL;
520 TAILQ_FOREACH(ifp, &ifnet, if_link) {
521 if (ifp->if_type != IFT_ETHER) continue;
522 EFDEBUG("Found interface %s%d\n", ifp->if_name, ifp->if_unit);
523 efl = (struct ef_link*)malloc(sizeof(struct ef_link),
529 bzero(efl, sizeof(*efl));
533 error = ef_clone(efl, ETHER_FT_EII);
537 error = ef_clone(efl, ETHER_FT_8023);
541 error = ef_clone(efl, ETHER_FT_8022);
545 error = ef_clone(efl, ETHER_FT_SNAP);
549 SLIST_INSERT_HEAD(&efdev, efl, el_next);
553 SLIST_INSERT_HEAD(&efdev, efl, el_next);
554 SLIST_FOREACH(efl, &efdev, el_next) {
555 for (d = 0; d < EF_NFT; d++)
556 if (efl->el_units[d])
557 free(efl->el_units[d], M_IFADDR);
562 SLIST_FOREACH(efl, &efdev, el_next) {
563 for (d = 0; d < EF_NFT; d++) {
564 efp = efl->el_units[d];
569 ef_inputp = ef_input;
570 ef_outputp = ef_output;
584 SLIST_FOREACH(efl, &efdev, el_next) {
585 for (d = 0; d < EF_NFT; d++) {
586 efp = efl->el_units[d];
592 EFDEBUG("Unloaded\n");
597 if_ef_modevent(module_t mod, int type, void *data)
599 switch ((modeventtype_t)type) {
610 static moduledata_t if_ef_mod = {
611 "if_ef", if_ef_modevent, NULL
614 DECLARE_MODULE(if_ef, if_ef_mod, SI_SUB_PSEUDO, SI_ORDER_MIDDLE);