1/*-
2 * Copyright (c) 1999, 2000 Boris Popov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/net/if_ef.c 111888 2003-03-04 23:19:55Z jlemon $
27 */
28
29#include "opt_inet.h"
30#include "opt_ipx.h"
31#include "opt_ef.h"
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/sockio.h>
36#include <sys/malloc.h>
37#include <sys/mbuf.h>
38#include <sys/socket.h>
39#include <sys/syslog.h>
40#include <sys/kernel.h>
41#include <sys/module.h>
42
43#include <net/ethernet.h>
44#include <net/if_llc.h>
45#include <net/if.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>
51#include <net/bpf.h>
52
53#ifdef INET
54#include <netinet/in.h>
55#include <netinet/in_var.h>
56#include <netinet/if_ether.h>
57#endif
58
59#ifdef IPX
60#include <netipx/ipx.h>
61#include <netipx/ipx_if.h>
62#endif
63
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 */
70
71#ifdef EF_DEBUG
72#define EFDEBUG(format, args...) printf("%s: "format, __func__ ,## args)
73#else
74#define EFDEBUG(format, args...)
75#endif
76
77#define EFERROR(format, args...) printf("%s: "format, __func__ ,## args)
78
79struct efnet {
80 struct arpcom ef_ac;
81 struct ifnet * ef_ifp;
82};
83
84struct ef_link {
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 */
88};
89
90static SLIST_HEAD(ef_link_head, ef_link) efdev = {NULL};
91static int efcount;
92
93extern int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m);
94extern int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
95 struct sockaddr *dst, short *tp, int *hlen);
96
97/*
98static void ef_reset (struct ifnet *);
99*/
100static int ef_attach(struct efnet *sc);
101static int ef_detach(struct efnet *sc);
102static void ef_init(void *);
103static int ef_ioctl(struct ifnet *, u_long, caddr_t);
104static void ef_start(struct ifnet *);
105static int ef_input(struct ifnet*, struct ether_header *, struct mbuf *);
106static int ef_output(struct ifnet *ifp, struct mbuf **mp,
107 struct sockaddr *dst, short *tp, int *hlen);
108
109static int ef_load(void);
110static int ef_unload(void);
111
112/*
113 * Install the interface, most of structure initialization done in ef_clone()
114 */
115static int
116ef_attach(struct efnet *sc)
117{
118 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
119 struct ifaddr *ifa2;
120 struct sockaddr_dl *sdl2;
121
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);
128 /*
129 * Attach the interface
130 */
131 ifa2 = ifaddr_byindex(sc->ef_ifp->if_index);
132 sdl2 = (struct sockaddr_dl *)ifa2->ifa_addr;
133 ether_ifattach(ifp, LLADDR(sdl2));
134
135 ifp->if_resolvemulti = 0;
136 ifp->if_type = IFT_XETHER;
137 ifp->if_flags |= IFF_RUNNING;
138
139 bcopy(LLADDR(sdl2), sc->ef_ac.ac_enaddr, ETHER_ADDR_LEN);
140
141 EFDEBUG("%s%d: attached\n", ifp->if_name, ifp->if_unit);
142 return 1;
143}
144
145/*
146 * This is for _testing_only_, just removes interface from interfaces list
147 */
148static int
149ef_detach(struct efnet *sc)
150{
151 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
152 int s;
153
154 s = splimp();
155
156 if (ifp->if_flags & IFF_UP) {
157 if_down(ifp);
158 if (ifp->if_flags & IFF_RUNNING) {
159 /* find internet addresses and delete routes */
160 register struct ifaddr *ifa;
161 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
162 rtinit(ifa, (int)RTM_DELETE, 0);
163 }
164 }
165 }
166 IFNET_WLOCK();
167 TAILQ_REMOVE(&ifnet, ifp, if_link);
168 IFNET_WUNLOCK();
169 splx(s);
170 return 0;
171}
172
173static void
174ef_init(void *foo) {
175 return;
176}
177
178static int
179ef_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
180{
181/* struct ef_link *sc = (struct ef_link*)ifp->if_softc;*/
182 struct ifaddr *ifa = (struct ifaddr*)data;
183 int s, error;
184
185 EFDEBUG("IOCTL %ld for %s%d\n", cmd, ifp->if_name, ifp->if_unit);
186 error = 0;
187 s = splimp();
188 switch (cmd) {
189 case SIOCSIFFLAGS:
190 error = 0;
191 break;
192 case SIOCSIFADDR:
193 if (ifp->if_unit == ETHER_FT_8023 &&
194 ifa->ifa_addr->sa_family != AF_IPX) {
195 error = EAFNOSUPPORT;
196 break;
197 }
198 ifp->if_flags |= IFF_UP;
199 /* FALL THROUGH */
200 default:
201 error = ether_ioctl(ifp, cmd, data);
202 break;
203 }
204 splx(s);
205 return error;
206}
207
208/*
209 * Currently packet prepared in the ether_output(), but this can be a better
210 * place.
211 */
212static void
213ef_start(struct ifnet *ifp)
214{
215 struct efnet *sc = (struct efnet*)ifp->if_softc;
216 struct ifnet *p;
217 struct mbuf *m;
218
219 ifp->if_flags |= IFF_OACTIVE;
220 p = sc->ef_ifp;
221
222 EFDEBUG("\n");
223 for (;;) {
224 IF_DEQUEUE(&ifp->if_snd, m);
225 if (m == 0)
226 break;
227 BPF_MTAP(ifp, m);
228 if (! IF_HANDOFF(&p->if_snd, m, p)) {
229 ifp->if_oerrors++;
230 continue;
231 }
232 ifp->if_opackets++;
233 }
234 ifp->if_flags &= ~IFF_OACTIVE;
235 return;
236}
237
238/*
239 * Inline functions do not put additional overhead to procedure call or
240 * parameter passing but simplify the code
241 */
242static int __inline
243ef_inputEII(struct mbuf *m, struct ether_header *eh, u_short ether_type)
244{
245 int isr;
246
247 switch(ether_type) {
248#ifdef IPX
249 case ETHERTYPE_IPX:
250 isr = NETISR_IPX;
251 break;
252#endif
253#ifdef INET
254 case ETHERTYPE_IP:
255 if (ipflow_fastforward(m))
256 return (0);
257 isr = NETISR_IP;
258 break;
259
260 case ETHERTYPE_ARP:
261 isr = NETISR_ARP;
262 break;
263#endif
264 default:
265 return (EPROTONOSUPPORT);
266 }
267 netisr_dispatch(isr, m);
268 return (0);
269}
270
271static int __inline
272ef_inputSNAP(struct mbuf *m, struct ether_header *eh, struct llc* l,
273 u_short ether_type)
274{
275 int isr;
276
277 switch(ether_type) {
278#ifdef IPX
279 case ETHERTYPE_IPX:
280 m_adj(m, 8);
281 isr = NETISR_IPX;
282 break;
283#endif
284 default:
285 return (EPROTONOSUPPORT);
286 }
287 netisr_dispatch(isr, m);
288 return (0);
289}
290
291static int __inline
292ef_input8022(struct mbuf *m, struct ether_header *eh, struct llc* l,
293 u_short ether_type)
294{
295 int isr;
296
297 switch(ether_type) {
298#ifdef IPX
299 case 0xe0:
300 m_adj(m, 3);
301 isr = NETISR_IPX;
302 break;
303#endif
304 default:
305 return (EPROTONOSUPPORT);
306 }
307 netisr_dispatch(isr, m);
308 return (0);
309}
310
311/*
312 * Called from ether_input()
313 */
314static int
315ef_input(struct ifnet *ifp, struct ether_header *eh, struct mbuf *m)
316{
317 u_short ether_type;
318 int ft = -1;
319 struct efnet *efp;
320 struct ifnet *eifp;
321 struct llc *l;
322 struct ef_link *efl;
323 int isr;
324
325 ether_type = ntohs(eh->ether_type);
326 if (ether_type < ETHERMTU) {
327 l = mtod(m, struct llc*);
328 if (l->llc_dsap == 0xff && l->llc_ssap == 0xff) {
329 /*
330 * Novell's "802.3" frame
331 */
332 ft = ETHER_FT_8023;
333 } else if (l->llc_dsap == 0xaa && l->llc_ssap == 0xaa) {
334 /*
335 * 802.2/SNAP
336 */
337 ft = ETHER_FT_SNAP;
338 ether_type = ntohs(l->llc_un.type_snap.ether_type);
339 } else if (l->llc_dsap == l->llc_ssap) {
340 /*
341 * 802.3/802.2
342 */
343 ft = ETHER_FT_8022;
344 ether_type = l->llc_ssap;
345 }
346 } else
347 ft = ETHER_FT_EII;
348
349 if (ft == -1) {
350 EFDEBUG("Unrecognised ether_type %x\n", ether_type);
351 return EPROTONOSUPPORT;
352 }
353
354 /*
355 * Check if interface configured for the given frame
356 */
357 efp = NULL;
358 SLIST_FOREACH(efl, &efdev, el_next) {
359 if (efl->el_ifp == ifp) {
360 efp = efl->el_units[ft];
361 break;
362 }
363 }
364 if (efp == NULL) {
365 EFDEBUG("Can't find if for %d\n", ft);
366 return EPROTONOSUPPORT;
367 }
368 eifp = &efp->ef_ac.ac_if;
369 if ((eifp->if_flags & IFF_UP) == 0)
370 return EPROTONOSUPPORT;
371 eifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
372 m->m_pkthdr.rcvif = eifp;
373
374 if (eifp->if_bpf) {
375 struct mbuf m0;
376 m0.m_next = m;
377 m0.m_len = ETHER_HDR_LEN;
378 m0.m_data = (char *)eh;
379 BPF_MTAP(eifp, &m0);
380 }
381 /*
382 * Now we ready to adjust mbufs and pass them to protocol intr's
383 */
384 switch(ft) {
385 case ETHER_FT_EII:
386 return (ef_inputEII(m, eh, ether_type));
387 break;
388#ifdef IPX
389 case ETHER_FT_8023: /* only IPX can be here */
390 isr = NETISR_IPX;
391 break;
392#endif
393 case ETHER_FT_SNAP:
394 return (ef_inputSNAP(m, eh, l, ether_type));
395 break;
396 case ETHER_FT_8022:
397 return (ef_input8022(m, eh, l, ether_type));
398 break;
399 default:
400 EFDEBUG("No support for frame %d and proto %04x\n",
401 ft, ether_type);
402 return (EPROTONOSUPPORT);
403 }
404 netisr_dispatch(isr, m);
405 return (0);
406}
407
408static int
409ef_output(struct ifnet *ifp, struct mbuf **mp, struct sockaddr *dst, short *tp,
410 int *hlen)
411{
412 struct mbuf *m = *mp;
413 u_char *cp;
414 short type;
415
416 if (ifp->if_type != IFT_XETHER)
417 return ENETDOWN;
418 switch (ifp->if_unit) {
419 case ETHER_FT_EII:
420#ifdef IPX
421 type = htons(ETHERTYPE_IPX);
422#else
423 return EPFNOSUPPORT;
424#endif
425 break;
426 case ETHER_FT_8023:
427 type = htons(m->m_pkthdr.len);
428 break;
429 case ETHER_FT_8022:
430 M_PREPEND(m, ETHER_HDR_LEN + 3, M_TRYWAIT);
431 if (m == NULL) {
432 *mp = NULL;
433 return ENOBUFS;
434 }
435 /*
436 * Ensure that ethernet header and next three bytes
437 * will fit into single mbuf
438 */
439 m = m_pullup(m, ETHER_HDR_LEN + 3);
440 if (m == NULL) {
441 *mp = NULL;
442 return ENOBUFS;
443 }
444 m_adj(m, ETHER_HDR_LEN);
445 type = htons(m->m_pkthdr.len);
446 cp = mtod(m, u_char *);
447 *cp++ = 0xE0;
448 *cp++ = 0xE0;
449 *cp++ = 0x03;
450 *hlen += 3;
451 break;
452 case ETHER_FT_SNAP:
453 M_PREPEND(m, 8, M_TRYWAIT);
454 if (m == NULL) {
455 *mp = NULL;
456 return ENOBUFS;
457 }
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);
461 *hlen += 8;
462 break;
463 default:
464 return EPFNOSUPPORT;
465 }
466 *mp = m;
467 *tp = type;
468 return 0;
469}
470
471/*
472 * Create clone from the given interface
473 */
474static int
475ef_clone(struct ef_link *efl, int ft)
476{
477 struct efnet *efp;
478 struct ifnet *eifp;
479 struct ifnet *ifp = efl->el_ifp;
480 char cbuf[IFNAMSIZ], *ifname;
481 int ifnlen;
482
483 efp = (struct efnet*)malloc(sizeof(struct efnet), M_IFADDR,
484 M_WAITOK | M_ZERO);
485 if (efp == NULL)
486 return ENOMEM;
487 efp->ef_ifp = ifp;
488 eifp = &efp->ef_ac.ac_if;
489 ifnlen = 1 + snprintf(cbuf, sizeof(cbuf), "%s%df", ifp->if_name,
490 ifp->if_unit);
491 ifname = (char*)malloc(ifnlen, M_IFADDR, M_WAITOK);
492 eifp->if_name = strcpy(ifname, cbuf);
493 eifp->if_unit = ft;
494 eifp->if_softc = efp;
495 if (ifp->if_ioctl)
496 eifp->if_ioctl = ef_ioctl;
497 efl->el_units[ft] = efp;
498 return 0;
499}
500
501static int
502ef_load(void)
503{
504 struct ifnet *ifp;
505 struct efnet *efp;
506 struct ef_link *efl = NULL;
507 int error = 0, d;
508
509 IFNET_RLOCK();
510 TAILQ_FOREACH(ifp, &ifnet, if_link) {
511 if (ifp->if_type != IFT_ETHER) continue;
512 EFDEBUG("Found interface %s%d\n", ifp->if_name, ifp->if_unit);
513 efl = (struct ef_link*)malloc(sizeof(struct ef_link),
514 M_IFADDR, M_WAITOK | M_ZERO);
515 if (efl == NULL) {
516 error = ENOMEM;
517 break;
518 }
519
520 efl->el_ifp = ifp;
521#ifdef ETHER_II
522 error = ef_clone(efl, ETHER_FT_EII);
523 if (error) break;
524#endif
525#ifdef ETHER_8023
526 error = ef_clone(efl, ETHER_FT_8023);
527 if (error) break;
528#endif
529#ifdef ETHER_8022
530 error = ef_clone(efl, ETHER_FT_8022);
531 if (error) break;
532#endif
533#ifdef ETHER_SNAP
534 error = ef_clone(efl, ETHER_FT_SNAP);
535 if (error) break;
536#endif
537 efcount++;
538 SLIST_INSERT_HEAD(&efdev, efl, el_next);
539 }
540 IFNET_RUNLOCK();
541 if (error) {
542 if (efl)
543 SLIST_INSERT_HEAD(&efdev, efl, el_next);
544 SLIST_FOREACH(efl, &efdev, el_next) {
545 for (d = 0; d < EF_NFT; d++)
546 if (efl->el_units[d])
547 free(efl->el_units[d], M_IFADDR);
548 free(efl, M_IFADDR);
549 }
550 return error;
551 }
552 SLIST_FOREACH(efl, &efdev, el_next) {
553 for (d = 0; d < EF_NFT; d++) {
554 efp = efl->el_units[d];
555 if (efp)
556 ef_attach(efp);
557 }
558 }
559 ef_inputp = ef_input;
560 ef_outputp = ef_output;
561 EFDEBUG("Loaded\n");
562 return 0;
563}
564
565static int
566ef_unload(void)
567{
568 struct efnet *efp;
569 struct ef_link *efl;
570 int d;
571
572 ef_inputp = NULL;
573 ef_outputp = NULL;
574 SLIST_FOREACH(efl, &efdev, el_next) {
575 for (d = 0; d < EF_NFT; d++) {
576 efp = efl->el_units[d];
577 if (efp) {
578 ef_detach(efp);
579 }
580 }
581 }
582 EFDEBUG("Unloaded\n");
583 return 0;
584}
585
586static int
587if_ef_modevent(module_t mod, int type, void *data)
588{
589 switch ((modeventtype_t)type) {
590 case MOD_LOAD:
591 return ef_load();
592 case MOD_UNLOAD:
593 return ef_unload();
594 default:
595 break;
596 }
597 return 0;
598}
599
600static moduledata_t if_ef_mod = {
601 "if_ef", if_ef_modevent, NULL
602};
603
604DECLARE_MODULE(if_ef, if_ef_mod, SI_SUB_PSEUDO, SI_ORDER_MIDDLE);
2 * Copyright (c) 1999, 2000 Boris Popov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/net/if_ef.c 111888 2003-03-04 23:19:55Z jlemon $
27 */
28
29#include "opt_inet.h"
30#include "opt_ipx.h"
31#include "opt_ef.h"
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/sockio.h>
36#include <sys/malloc.h>
37#include <sys/mbuf.h>
38#include <sys/socket.h>
39#include <sys/syslog.h>
40#include <sys/kernel.h>
41#include <sys/module.h>
42
43#include <net/ethernet.h>
44#include <net/if_llc.h>
45#include <net/if.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>
51#include <net/bpf.h>
52
53#ifdef INET
54#include <netinet/in.h>
55#include <netinet/in_var.h>
56#include <netinet/if_ether.h>
57#endif
58
59#ifdef IPX
60#include <netipx/ipx.h>
61#include <netipx/ipx_if.h>
62#endif
63
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 */
70
71#ifdef EF_DEBUG
72#define EFDEBUG(format, args...) printf("%s: "format, __func__ ,## args)
73#else
74#define EFDEBUG(format, args...)
75#endif
76
77#define EFERROR(format, args...) printf("%s: "format, __func__ ,## args)
78
79struct efnet {
80 struct arpcom ef_ac;
81 struct ifnet * ef_ifp;
82};
83
84struct ef_link {
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 */
88};
89
90static SLIST_HEAD(ef_link_head, ef_link) efdev = {NULL};
91static int efcount;
92
93extern int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m);
94extern int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp,
95 struct sockaddr *dst, short *tp, int *hlen);
96
97/*
98static void ef_reset (struct ifnet *);
99*/
100static int ef_attach(struct efnet *sc);
101static int ef_detach(struct efnet *sc);
102static void ef_init(void *);
103static int ef_ioctl(struct ifnet *, u_long, caddr_t);
104static void ef_start(struct ifnet *);
105static int ef_input(struct ifnet*, struct ether_header *, struct mbuf *);
106static int ef_output(struct ifnet *ifp, struct mbuf **mp,
107 struct sockaddr *dst, short *tp, int *hlen);
108
109static int ef_load(void);
110static int ef_unload(void);
111
112/*
113 * Install the interface, most of structure initialization done in ef_clone()
114 */
115static int
116ef_attach(struct efnet *sc)
117{
118 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
119 struct ifaddr *ifa2;
120 struct sockaddr_dl *sdl2;
121
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);
128 /*
129 * Attach the interface
130 */
131 ifa2 = ifaddr_byindex(sc->ef_ifp->if_index);
132 sdl2 = (struct sockaddr_dl *)ifa2->ifa_addr;
133 ether_ifattach(ifp, LLADDR(sdl2));
134
135 ifp->if_resolvemulti = 0;
136 ifp->if_type = IFT_XETHER;
137 ifp->if_flags |= IFF_RUNNING;
138
139 bcopy(LLADDR(sdl2), sc->ef_ac.ac_enaddr, ETHER_ADDR_LEN);
140
141 EFDEBUG("%s%d: attached\n", ifp->if_name, ifp->if_unit);
142 return 1;
143}
144
145/*
146 * This is for _testing_only_, just removes interface from interfaces list
147 */
148static int
149ef_detach(struct efnet *sc)
150{
151 struct ifnet *ifp = (struct ifnet*)&sc->ef_ac.ac_if;
152 int s;
153
154 s = splimp();
155
156 if (ifp->if_flags & IFF_UP) {
157 if_down(ifp);
158 if (ifp->if_flags & IFF_RUNNING) {
159 /* find internet addresses and delete routes */
160 register struct ifaddr *ifa;
161 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
162 rtinit(ifa, (int)RTM_DELETE, 0);
163 }
164 }
165 }
166 IFNET_WLOCK();
167 TAILQ_REMOVE(&ifnet, ifp, if_link);
168 IFNET_WUNLOCK();
169 splx(s);
170 return 0;
171}
172
173static void
174ef_init(void *foo) {
175 return;
176}
177
178static int
179ef_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
180{
181/* struct ef_link *sc = (struct ef_link*)ifp->if_softc;*/
182 struct ifaddr *ifa = (struct ifaddr*)data;
183 int s, error;
184
185 EFDEBUG("IOCTL %ld for %s%d\n", cmd, ifp->if_name, ifp->if_unit);
186 error = 0;
187 s = splimp();
188 switch (cmd) {
189 case SIOCSIFFLAGS:
190 error = 0;
191 break;
192 case SIOCSIFADDR:
193 if (ifp->if_unit == ETHER_FT_8023 &&
194 ifa->ifa_addr->sa_family != AF_IPX) {
195 error = EAFNOSUPPORT;
196 break;
197 }
198 ifp->if_flags |= IFF_UP;
199 /* FALL THROUGH */
200 default:
201 error = ether_ioctl(ifp, cmd, data);
202 break;
203 }
204 splx(s);
205 return error;
206}
207
208/*
209 * Currently packet prepared in the ether_output(), but this can be a better
210 * place.
211 */
212static void
213ef_start(struct ifnet *ifp)
214{
215 struct efnet *sc = (struct efnet*)ifp->if_softc;
216 struct ifnet *p;
217 struct mbuf *m;
218
219 ifp->if_flags |= IFF_OACTIVE;
220 p = sc->ef_ifp;
221
222 EFDEBUG("\n");
223 for (;;) {
224 IF_DEQUEUE(&ifp->if_snd, m);
225 if (m == 0)
226 break;
227 BPF_MTAP(ifp, m);
228 if (! IF_HANDOFF(&p->if_snd, m, p)) {
229 ifp->if_oerrors++;
230 continue;
231 }
232 ifp->if_opackets++;
233 }
234 ifp->if_flags &= ~IFF_OACTIVE;
235 return;
236}
237
238/*
239 * Inline functions do not put additional overhead to procedure call or
240 * parameter passing but simplify the code
241 */
242static int __inline
243ef_inputEII(struct mbuf *m, struct ether_header *eh, u_short ether_type)
244{
245 int isr;
246
247 switch(ether_type) {
248#ifdef IPX
249 case ETHERTYPE_IPX:
250 isr = NETISR_IPX;
251 break;
252#endif
253#ifdef INET
254 case ETHERTYPE_IP:
255 if (ipflow_fastforward(m))
256 return (0);
257 isr = NETISR_IP;
258 break;
259
260 case ETHERTYPE_ARP:
261 isr = NETISR_ARP;
262 break;
263#endif
264 default:
265 return (EPROTONOSUPPORT);
266 }
267 netisr_dispatch(isr, m);
268 return (0);
269}
270
271static int __inline
272ef_inputSNAP(struct mbuf *m, struct ether_header *eh, struct llc* l,
273 u_short ether_type)
274{
275 int isr;
276
277 switch(ether_type) {
278#ifdef IPX
279 case ETHERTYPE_IPX:
280 m_adj(m, 8);
281 isr = NETISR_IPX;
282 break;
283#endif
284 default:
285 return (EPROTONOSUPPORT);
286 }
287 netisr_dispatch(isr, m);
288 return (0);
289}
290
291static int __inline
292ef_input8022(struct mbuf *m, struct ether_header *eh, struct llc* l,
293 u_short ether_type)
294{
295 int isr;
296
297 switch(ether_type) {
298#ifdef IPX
299 case 0xe0:
300 m_adj(m, 3);
301 isr = NETISR_IPX;
302 break;
303#endif
304 default:
305 return (EPROTONOSUPPORT);
306 }
307 netisr_dispatch(isr, m);
308 return (0);
309}
310
311/*
312 * Called from ether_input()
313 */
314static int
315ef_input(struct ifnet *ifp, struct ether_header *eh, struct mbuf *m)
316{
317 u_short ether_type;
318 int ft = -1;
319 struct efnet *efp;
320 struct ifnet *eifp;
321 struct llc *l;
322 struct ef_link *efl;
323 int isr;
324
325 ether_type = ntohs(eh->ether_type);
326 if (ether_type < ETHERMTU) {
327 l = mtod(m, struct llc*);
328 if (l->llc_dsap == 0xff && l->llc_ssap == 0xff) {
329 /*
330 * Novell's "802.3" frame
331 */
332 ft = ETHER_FT_8023;
333 } else if (l->llc_dsap == 0xaa && l->llc_ssap == 0xaa) {
334 /*
335 * 802.2/SNAP
336 */
337 ft = ETHER_FT_SNAP;
338 ether_type = ntohs(l->llc_un.type_snap.ether_type);
339 } else if (l->llc_dsap == l->llc_ssap) {
340 /*
341 * 802.3/802.2
342 */
343 ft = ETHER_FT_8022;
344 ether_type = l->llc_ssap;
345 }
346 } else
347 ft = ETHER_FT_EII;
348
349 if (ft == -1) {
350 EFDEBUG("Unrecognised ether_type %x\n", ether_type);
351 return EPROTONOSUPPORT;
352 }
353
354 /*
355 * Check if interface configured for the given frame
356 */
357 efp = NULL;
358 SLIST_FOREACH(efl, &efdev, el_next) {
359 if (efl->el_ifp == ifp) {
360 efp = efl->el_units[ft];
361 break;
362 }
363 }
364 if (efp == NULL) {
365 EFDEBUG("Can't find if for %d\n", ft);
366 return EPROTONOSUPPORT;
367 }
368 eifp = &efp->ef_ac.ac_if;
369 if ((eifp->if_flags & IFF_UP) == 0)
370 return EPROTONOSUPPORT;
371 eifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh);
372 m->m_pkthdr.rcvif = eifp;
373
374 if (eifp->if_bpf) {
375 struct mbuf m0;
376 m0.m_next = m;
377 m0.m_len = ETHER_HDR_LEN;
378 m0.m_data = (char *)eh;
379 BPF_MTAP(eifp, &m0);
380 }
381 /*
382 * Now we ready to adjust mbufs and pass them to protocol intr's
383 */
384 switch(ft) {
385 case ETHER_FT_EII:
386 return (ef_inputEII(m, eh, ether_type));
387 break;
388#ifdef IPX
389 case ETHER_FT_8023: /* only IPX can be here */
390 isr = NETISR_IPX;
391 break;
392#endif
393 case ETHER_FT_SNAP:
394 return (ef_inputSNAP(m, eh, l, ether_type));
395 break;
396 case ETHER_FT_8022:
397 return (ef_input8022(m, eh, l, ether_type));
398 break;
399 default:
400 EFDEBUG("No support for frame %d and proto %04x\n",
401 ft, ether_type);
402 return (EPROTONOSUPPORT);
403 }
404 netisr_dispatch(isr, m);
405 return (0);
406}
407
408static int
409ef_output(struct ifnet *ifp, struct mbuf **mp, struct sockaddr *dst, short *tp,
410 int *hlen)
411{
412 struct mbuf *m = *mp;
413 u_char *cp;
414 short type;
415
416 if (ifp->if_type != IFT_XETHER)
417 return ENETDOWN;
418 switch (ifp->if_unit) {
419 case ETHER_FT_EII:
420#ifdef IPX
421 type = htons(ETHERTYPE_IPX);
422#else
423 return EPFNOSUPPORT;
424#endif
425 break;
426 case ETHER_FT_8023:
427 type = htons(m->m_pkthdr.len);
428 break;
429 case ETHER_FT_8022:
430 M_PREPEND(m, ETHER_HDR_LEN + 3, M_TRYWAIT);
431 if (m == NULL) {
432 *mp = NULL;
433 return ENOBUFS;
434 }
435 /*
436 * Ensure that ethernet header and next three bytes
437 * will fit into single mbuf
438 */
439 m = m_pullup(m, ETHER_HDR_LEN + 3);
440 if (m == NULL) {
441 *mp = NULL;
442 return ENOBUFS;
443 }
444 m_adj(m, ETHER_HDR_LEN);
445 type = htons(m->m_pkthdr.len);
446 cp = mtod(m, u_char *);
447 *cp++ = 0xE0;
448 *cp++ = 0xE0;
449 *cp++ = 0x03;
450 *hlen += 3;
451 break;
452 case ETHER_FT_SNAP:
453 M_PREPEND(m, 8, M_TRYWAIT);
454 if (m == NULL) {
455 *mp = NULL;
456 return ENOBUFS;
457 }
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);
461 *hlen += 8;
462 break;
463 default:
464 return EPFNOSUPPORT;
465 }
466 *mp = m;
467 *tp = type;
468 return 0;
469}
470
471/*
472 * Create clone from the given interface
473 */
474static int
475ef_clone(struct ef_link *efl, int ft)
476{
477 struct efnet *efp;
478 struct ifnet *eifp;
479 struct ifnet *ifp = efl->el_ifp;
480 char cbuf[IFNAMSIZ], *ifname;
481 int ifnlen;
482
483 efp = (struct efnet*)malloc(sizeof(struct efnet), M_IFADDR,
484 M_WAITOK | M_ZERO);
485 if (efp == NULL)
486 return ENOMEM;
487 efp->ef_ifp = ifp;
488 eifp = &efp->ef_ac.ac_if;
489 ifnlen = 1 + snprintf(cbuf, sizeof(cbuf), "%s%df", ifp->if_name,
490 ifp->if_unit);
491 ifname = (char*)malloc(ifnlen, M_IFADDR, M_WAITOK);
492 eifp->if_name = strcpy(ifname, cbuf);
493 eifp->if_unit = ft;
494 eifp->if_softc = efp;
495 if (ifp->if_ioctl)
496 eifp->if_ioctl = ef_ioctl;
497 efl->el_units[ft] = efp;
498 return 0;
499}
500
501static int
502ef_load(void)
503{
504 struct ifnet *ifp;
505 struct efnet *efp;
506 struct ef_link *efl = NULL;
507 int error = 0, d;
508
509 IFNET_RLOCK();
510 TAILQ_FOREACH(ifp, &ifnet, if_link) {
511 if (ifp->if_type != IFT_ETHER) continue;
512 EFDEBUG("Found interface %s%d\n", ifp->if_name, ifp->if_unit);
513 efl = (struct ef_link*)malloc(sizeof(struct ef_link),
514 M_IFADDR, M_WAITOK | M_ZERO);
515 if (efl == NULL) {
516 error = ENOMEM;
517 break;
518 }
519
520 efl->el_ifp = ifp;
521#ifdef ETHER_II
522 error = ef_clone(efl, ETHER_FT_EII);
523 if (error) break;
524#endif
525#ifdef ETHER_8023
526 error = ef_clone(efl, ETHER_FT_8023);
527 if (error) break;
528#endif
529#ifdef ETHER_8022
530 error = ef_clone(efl, ETHER_FT_8022);
531 if (error) break;
532#endif
533#ifdef ETHER_SNAP
534 error = ef_clone(efl, ETHER_FT_SNAP);
535 if (error) break;
536#endif
537 efcount++;
538 SLIST_INSERT_HEAD(&efdev, efl, el_next);
539 }
540 IFNET_RUNLOCK();
541 if (error) {
542 if (efl)
543 SLIST_INSERT_HEAD(&efdev, efl, el_next);
544 SLIST_FOREACH(efl, &efdev, el_next) {
545 for (d = 0; d < EF_NFT; d++)
546 if (efl->el_units[d])
547 free(efl->el_units[d], M_IFADDR);
548 free(efl, M_IFADDR);
549 }
550 return error;
551 }
552 SLIST_FOREACH(efl, &efdev, el_next) {
553 for (d = 0; d < EF_NFT; d++) {
554 efp = efl->el_units[d];
555 if (efp)
556 ef_attach(efp);
557 }
558 }
559 ef_inputp = ef_input;
560 ef_outputp = ef_output;
561 EFDEBUG("Loaded\n");
562 return 0;
563}
564
565static int
566ef_unload(void)
567{
568 struct efnet *efp;
569 struct ef_link *efl;
570 int d;
571
572 ef_inputp = NULL;
573 ef_outputp = NULL;
574 SLIST_FOREACH(efl, &efdev, el_next) {
575 for (d = 0; d < EF_NFT; d++) {
576 efp = efl->el_units[d];
577 if (efp) {
578 ef_detach(efp);
579 }
580 }
581 }
582 EFDEBUG("Unloaded\n");
583 return 0;
584}
585
586static int
587if_ef_modevent(module_t mod, int type, void *data)
588{
589 switch ((modeventtype_t)type) {
590 case MOD_LOAD:
591 return ef_load();
592 case MOD_UNLOAD:
593 return ef_unload();
594 default:
595 break;
596 }
597 return 0;
598}
599
600static moduledata_t if_ef_mod = {
601 "if_ef", if_ef_modevent, NULL
602};
603
604DECLARE_MODULE(if_ef, if_ef_mod, SI_SUB_PSEUDO, SI_ORDER_MIDDLE);