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1/*****************************************************************************
2* ppp_oe.c - PPP Over Ethernet implementation for lwIP.
3*
4* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
5*
6* The authors hereby grant permission to use, copy, modify, distribute,
7* and license this software and its documentation for any purpose, provided
8* that existing copyright notices are retained in all copies and that this
9* notice and the following disclaimer are included verbatim in any
10* distributions. No written agreement, license, or royalty fee is required
11* for any of the authorized uses.
12*
13* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
14* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
17* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23*
24******************************************************************************
25* REVISION HISTORY
26*
27* 06-01-01 Marc Boucher <marc@mbsi.ca>
28* Ported to lwIP.
29*****************************************************************************/
30
31
32
33/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
34
35/*-
36 * Copyright (c) 2002 The NetBSD Foundation, Inc.
37 * All rights reserved.
38 *
39 * This code is derived from software contributed to The NetBSD Foundation
40 * by Martin Husemann <martin@NetBSD.org>.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
50 * 3. All advertising materials mentioning features or use of this software
51 * must display the following acknowledgement:
52 * This product includes software developed by the NetBSD
53 * Foundation, Inc. and its contributors.
54 * 4. Neither the name of The NetBSD Foundation nor the names of its
55 * contributors may be used to endorse or promote products derived
56 * from this software without specific prior written permission.
57 *
58 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
59 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
60 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
61 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
62 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
63 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
64 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
65 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
66 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
67 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
68 * POSSIBILITY OF SUCH DAMAGE.
69 */
70
71#include "lwip/opt.h"
72
73#if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
74
75#include "ppp.h"
76#include "pppdebug.h"
77
78#include "lwip/sys.h"
79
80#include "netif/ppp_oe.h"
81#include "netif/etharp.h"
82
83#include <string.h>
84#include <stdio.h>
85
86/** @todo Replace this part with a simple list like other lwIP lists */
87#ifndef _SYS_QUEUE_H_
88#define _SYS_QUEUE_H_
89
90/*
91 * A list is headed by a single forward pointer (or an array of forward
92 * pointers for a hash table header). The elements are doubly linked
93 * so that an arbitrary element can be removed without a need to
94 * traverse the list. New elements can be added to the list before
95 * or after an existing element or at the head of the list. A list
96 * may only be traversed in the forward direction.
97 *
98 * For details on the use of these macros, see the queue(3) manual page.
99 */
100
101/*
102 * List declarations.
103 */
104#define LIST_HEAD(name, type) \
105struct name { \
106 struct type *lh_first; /* first element */ \
107}
108
109#define LIST_HEAD_INITIALIZER(head) \
110 { NULL }
111
112#define LIST_ENTRY(type) \
113struct { \
114 struct type *le_next; /* next element */ \
115 struct type **le_prev; /* address of previous next element */ \
116}
117
118/*
119 * List functions.
120 */
121
122#define LIST_EMPTY(head) ((head)->lh_first == NULL)
123
124#define LIST_FIRST(head) ((head)->lh_first)
125
126#define LIST_FOREACH(var, head, field) \
127 for ((var) = LIST_FIRST((head)); \
128 (var); \
129 (var) = LIST_NEXT((var), field))
130
131#define LIST_INIT(head) do { \
132 LIST_FIRST((head)) = NULL; \
133} while (0)
134
135#define LIST_INSERT_AFTER(listelm, elm, field) do { \
136 if ((LIST_NEXT((elm), field) = LIST_NEXT((listelm), field)) != NULL) \
137 LIST_NEXT((listelm), field)->field.le_prev = \
138 &LIST_NEXT((elm), field); \
139 LIST_NEXT((listelm), field) = (elm); \
140 (elm)->field.le_prev = &LIST_NEXT((listelm), field); \
141} while (0)
142
143#define LIST_INSERT_BEFORE(listelm, elm, field) do { \
144 (elm)->field.le_prev = (listelm)->field.le_prev; \
145 LIST_NEXT((elm), field) = (listelm); \
146 *(listelm)->field.le_prev = (elm); \
147 (listelm)->field.le_prev = &LIST_NEXT((elm), field); \
148} while (0)
149
150#define LIST_INSERT_HEAD(head, elm, field) do { \
151 if ((LIST_NEXT((elm), field) = LIST_FIRST((head))) != NULL) \
152 LIST_FIRST((head))->field.le_prev = &LIST_NEXT((elm), field); \
153 LIST_FIRST((head)) = (elm); \
154 (elm)->field.le_prev = &LIST_FIRST((head)); \
155} while (0)
156
157#define LIST_NEXT(elm, field) ((elm)->field.le_next)
158
159#define LIST_REMOVE(elm, field) do { \
160 if (LIST_NEXT((elm), field) != NULL) \
161 LIST_NEXT((elm), field)->field.le_prev = \
162 (elm)->field.le_prev; \
163 *(elm)->field.le_prev = LIST_NEXT((elm), field); \
164} while (0)
165
166#endif /* !_SYS_QUEUE_H_ */
167
168
169/* Add a 16 bit unsigned value to a buffer pointed to by PTR */
170#define PPPOE_ADD_16(PTR, VAL) \
171 *(PTR)++ = (VAL) / 256; \
172 *(PTR)++ = (VAL) % 256
173
174/* Add a complete PPPoE header to the buffer pointed to by PTR */
175#define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN) \
176 *(PTR)++ = PPPOE_VERTYPE; \
177 *(PTR)++ = (CODE); \
178 PPPOE_ADD_16(PTR, SESS); \
179 PPPOE_ADD_16(PTR, LEN)
180
181#define PPPOE_DISC_TIMEOUT (5*1000) /* base for quick timeout calculation */
182#define PPPOE_SLOW_RETRY (60*1000) /* persistent retry interval */
183#define PPPOE_DISC_MAXPADI 4 /* retry PADI four times (quickly) */
184#define PPPOE_DISC_MAXPADR 2 /* retry PADR twice */
185
186#ifdef PPPOE_SERVER
187/* from if_spppsubr.c */
188#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
189#endif
190
191struct pppoe_softc {
192 LIST_ENTRY(pppoe_softc) sc_list;
193 struct netif *sc_ethif; /* ethernet interface we are using */
194 int sc_pd; /* ppp unit number */
195 void (*sc_linkStatusCB)(int pd, int up);
196
197 int sc_state; /* discovery phase or session connected */
198 struct eth_addr sc_dest; /* hardware address of concentrator */
199 u16_t sc_session; /* PPPoE session id */
200
201 char *sc_service_name; /* if != NULL: requested name of service */
202 char *sc_concentrator_name; /* if != NULL: requested concentrator id */
203 u8_t *sc_ac_cookie; /* content of AC cookie we must echo back */
204 size_t sc_ac_cookie_len; /* length of cookie data */
205#ifdef PPPOE_SERVER
206 u8_t *sc_hunique; /* content of host unique we must echo back */
207 size_t sc_hunique_len; /* length of host unique */
208#endif
209 int sc_padi_retried; /* number of PADI retries already done */
210 int sc_padr_retried; /* number of PADR retries already done */
211};
212
213/* input routines */
214static void pppoe_dispatch_disc_pkt(struct netif *, struct pbuf *);
215
216/* management routines */
217static int pppoe_do_disconnect(struct pppoe_softc *);
218static void pppoe_abort_connect(struct pppoe_softc *);
219static void pppoe_clear_softc(struct pppoe_softc *, const char *);
220
221/* internal timeout handling */
222static void pppoe_timeout(void *);
223
224/* sending actual protocol controll packets */
225static err_t pppoe_send_padi(struct pppoe_softc *);
226static err_t pppoe_send_padr(struct pppoe_softc *);
227#ifdef PPPOE_SERVER
228static err_t pppoe_send_pado(struct pppoe_softc *);
229static err_t pppoe_send_pads(struct pppoe_softc *);
230#endif
231static err_t pppoe_send_padt(struct netif *, u_int, const u8_t *);
232
233/* internal helper functions */
234static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
235static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t *, size_t, struct netif *);
236
237static LIST_HEAD(pppoe_softc_head, pppoe_softc) pppoe_softc_list;
238
239int pppoe_hdrlen;
240
241void
242pppoe_init(void)
243{
244 pppoe_hdrlen = sizeof(struct eth_hdr) + PPPOE_HEADERLEN;
245 LIST_INIT(&pppoe_softc_list);
246}
247
248err_t
249pppoe_create(struct netif *ethif, int pd, void (*linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
250{
251 struct pppoe_softc *sc;
252
253 sc = mem_malloc(sizeof(struct pppoe_softc));
254 if(!sc) {
255 *scptr = NULL;
256 return ERR_MEM;
257 }
258 memset(sc, 0, sizeof(struct pppoe_softc));
259
260 /* changed to real address later */
261 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
262
263 sc->sc_pd = pd;
264 sc->sc_linkStatusCB = linkStatusCB;
265 sc->sc_ethif = ethif;
266
267 LIST_INSERT_HEAD(&pppoe_softc_list, sc, sc_list);
268
269 *scptr = sc;
270
271 return ERR_OK;
272}
273
274err_t
275pppoe_destroy(struct netif *ifp)
276{
277 struct pppoe_softc * sc;
278
279 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
280 if (sc->sc_ethif == ifp) {
281 break;
282 }
283 }
284
285 if(!(sc && (sc->sc_ethif == ifp))) {
286 return ERR_IF;
287 }
288
289 tcpip_untimeout(pppoe_timeout, sc);
290 LIST_REMOVE(sc, sc_list);
291
292 if (sc->sc_concentrator_name) {
293 mem_free(sc->sc_concentrator_name);
294 }
295 if (sc->sc_service_name) {
296 mem_free(sc->sc_service_name);
297 }
298 if (sc->sc_ac_cookie) {
299 mem_free(sc->sc_ac_cookie);
300 }
301 mem_free(sc);
302
303 return ERR_OK;
304}
305
306/*
307 * Find the interface handling the specified session.
308 * Note: O(number of sessions open), this is a client-side only, mean
309 * and lean implementation, so number of open sessions typically should
310 * be 1.
311 */
312static struct pppoe_softc *
313pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
314{
315 struct pppoe_softc *sc;
316
317 if (session == 0) {
318 return NULL;
319 }
320
321 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
322 if (sc->sc_state == PPPOE_STATE_SESSION
323 && sc->sc_session == session) {
324 if (sc->sc_ethif == rcvif) {
325 return sc;
326 } else {
327 return NULL;
328 }
329 }
330 }
331 return NULL;
332}
333
334/* Check host unique token passed and return appropriate softc pointer,
335 * or NULL if token is bogus. */
336static struct pppoe_softc *
337pppoe_find_softc_by_hunique(u8_t *token, size_t len, struct netif *rcvif)
338{
339 struct pppoe_softc *sc, *t;
340
341 if (LIST_EMPTY(&pppoe_softc_list)) {
342 return NULL;
343 }
344
345 if (len != sizeof sc) {
346 return NULL;
347 }
348 MEMCPY(&t, token, len);
349
350 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
351 if (sc == t) {
352 break;
353 }
354 }
355
356 if (sc == NULL) {
357 PPPDEBUG((LOG_DEBUG, "pppoe: alien host unique tag, no session found\n"));
358 return NULL;
359 }
360
361 /* should be safe to access *sc now */
362 if (sc->sc_state < PPPOE_STATE_PADI_SENT || sc->sc_state >= PPPOE_STATE_SESSION) {
363 printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
364 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
365 return NULL;
366 }
367 if (sc->sc_ethif != rcvif) {
368 printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
369 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
370 return NULL;
371 }
372 return sc;
373}
374
375static void
376pppoe_linkstatus_up(void *arg)
377{
378 struct pppoe_softc *sc = (struct pppoe_softc*)arg;
379
380 sc->sc_linkStatusCB(sc->sc_pd, 1);
381}
382
383/* analyze and handle a single received packet while not in session state */
384static void
385pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
386{
387 u16_t tag, len;
388 u16_t session, plen;
389 struct pppoe_softc *sc;
390 const char *err_msg;
391 char devname[6];
392 char *error;
393 u8_t *ac_cookie;
394 size_t ac_cookie_len;
395#ifdef PPPOE_SERVER
396 u8_t *hunique;
397 size_t hunique_len;
398#endif
399 struct pppoehdr *ph;
400 struct pppoetag pt;
401 int off = 0, err, errortag;
402 struct eth_hdr *ethhdr;
403
404 pb = pppSingleBuf(pb);
405
406 strcpy(devname, "pppoe"); /* as long as we don't know which instance */
407 err_msg = NULL;
408 errortag = 0;
409 if (pb->len < sizeof(*ethhdr)) {
410 goto done;
411 }
412 ethhdr = (struct eth_hdr *)pb->payload;
413 off += sizeof(*ethhdr);
414
415 ac_cookie = NULL;
416 ac_cookie_len = 0;
417#ifdef PPPOE_SERVER
418 hunique = NULL;
419 hunique_len = 0;
420#endif
421 session = 0;
422 if (pb->len - off <= PPPOE_HEADERLEN) {
423 printf("pppoe: packet too short: %d\n", pb->len);
424 goto done;
425 }
426
427 ph = (struct pppoehdr *) (ethhdr + 1);
428 if (ph->vertype != PPPOE_VERTYPE) {
429 printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
430 goto done;
431 }
432 session = ntohs(ph->session);
433 plen = ntohs(ph->plen);
434 off += sizeof(*ph);
435
436 if (plen + off > pb->len) {
437 printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
438 pb->len - off, plen);
439 goto done;
440 }
441 if(pb->tot_len == pb->len) {
442 pb->tot_len = pb->len = off + plen; /* ignore trailing garbage */
443 }
444 tag = 0;
445 len = 0;
446 sc = NULL;
447 while (off + sizeof(pt) <= pb->len) {
448 MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
449 tag = ntohs(pt.tag);
450 len = ntohs(pt.len);
451 if (off + sizeof(pt) + len > pb->len) {
452 printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
453 goto done;
454 }
455 switch (tag) {
456 case PPPOE_TAG_EOL:
457 goto breakbreak;
458 case PPPOE_TAG_SNAME:
459 break; /* ignored */
460 case PPPOE_TAG_ACNAME:
461 break; /* ignored */
462 case PPPOE_TAG_HUNIQUE:
463 if (sc != NULL) {
464 break;
465 }
466#ifdef PPPOE_SERVER
467 hunique = (u8_t*)pb->payload + off + sizeof(pt);
468 hunique_len = len;
469#endif
470 sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
471 if (sc != NULL) {
472 snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
473 }
474 break;
475 case PPPOE_TAG_ACCOOKIE:
476 if (ac_cookie == NULL) {
477 ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
478 ac_cookie_len = len;
479 }
480 break;
481 case PPPOE_TAG_SNAME_ERR:
482 err_msg = "SERVICE NAME ERROR";
483 errortag = 1;
484 break;
485 case PPPOE_TAG_ACSYS_ERR:
486 err_msg = "AC SYSTEM ERROR";
487 errortag = 1;
488 break;
489 case PPPOE_TAG_GENERIC_ERR:
490 err_msg = "GENERIC ERROR";
491 errortag = 1;
492 break;
493 }
494 if (err_msg) {
495 error = NULL;
496 if (errortag && len) {
497 error = mem_malloc(len+1);
498 if (error) {
499 strncpy(error, (char*)pb->payload + off + sizeof(pt), len);
500 error[len-1] = '\0';
501 }
502 }
503 if (error) {
504 printf("%s: %s: %s\n", devname, err_msg, error);
505 mem_free(error);
506 } else {
507 printf("%s: %s\n", devname, err_msg);
508 }
509 if (errortag) {
510 goto done;
511 }
512 }
513 off += sizeof(pt) + len;
514 }
515
516breakbreak:;
517 switch (ph->code) {
518 case PPPOE_CODE_PADI:
519#ifdef PPPOE_SERVER
520 /*
521 * got service name, concentrator name, and/or host unique.
522 * ignore if we have no interfaces with IFF_PASSIVE|IFF_UP.
523 */
524 if (LIST_EMPTY(&pppoe_softc_list)) {
525 goto done;
526 }
527 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
528 if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
529 continue;
530 }
531 if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
532 continue;
533 }
534 if (sc->sc_state == PPPOE_STATE_INITIAL) {
535 break;
536 }
537 }
538 if (sc == NULL) {
539 /* printf("pppoe: free passive interface is not found\n"); */
540 goto done;
541 }
542 if (hunique) {
543 if (sc->sc_hunique) {
544 mem_free(sc->sc_hunique);
545 }
546 sc->sc_hunique = mem_malloc(hunique_len);
547 if (sc->sc_hunique == NULL) {
548 goto done;
549 }
550 sc->sc_hunique_len = hunique_len;
551 MEMCPY(sc->sc_hunique, hunique, hunique_len);
552 }
553 MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
554 sc->sc_state = PPPOE_STATE_PADO_SENT;
555 pppoe_send_pado(sc);
556 break;
557 #endif /* PPPOE_SERVER */
558 case PPPOE_CODE_PADR:
559 #ifdef PPPOE_SERVER
560 /*
561 * get sc from ac_cookie if IFF_PASSIVE
562 */
563 if (ac_cookie == NULL) {
564 /* be quiet if there is not a single pppoe instance */
565 printf("pppoe: received PADR but not includes ac_cookie\n");
566 goto done;
567 }
568 sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
569 if (sc == NULL) {
570 /* be quiet if there is not a single pppoe instance */
571 if (!LIST_EMPTY(&pppoe_softc_list)) {
572 printf("pppoe: received PADR but could not find request for it\n");
573 }
574 goto done;
575 }
576 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
577 printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
578 goto done;
579 }
580 if (hunique) {
581 if (sc->sc_hunique) {
582 mem_free(sc->sc_hunique);
583 }
584 sc->sc_hunique = mem_malloc(hunique_len);
585 if (sc->sc_hunique == NULL) {
586 goto done;
587 }
588 sc->sc_hunique_len = hunique_len;
589 MEMCPY(sc->sc_hunique, hunique, hunique_len);
590 }
591 pppoe_send_pads(sc);
592 sc->sc_state = PPPOE_STATE_SESSION;
593 tcpip_timeout (100, pppoe_linkstatus_up, sc); /* notify upper layers */
594 break;
595 #else
596 /* ignore, we are no access concentrator */
597 goto done;
598 #endif /* PPPOE_SERVER */
599 case PPPOE_CODE_PADO:
600 if (sc == NULL) {
601 /* be quiet if there is not a single pppoe instance */
602 if (!LIST_EMPTY(&pppoe_softc_list)) {
603 printf("pppoe: received PADO but could not find request for it\n");
604 }
605 goto done;
606 }
607 if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
608 printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
609 goto done;
610 }
611 if (ac_cookie) {
612 if (sc->sc_ac_cookie) {
613 mem_free(sc->sc_ac_cookie);
614 }
615 sc->sc_ac_cookie = mem_malloc(ac_cookie_len);
616 if (sc->sc_ac_cookie == NULL) {
617 goto done;
618 }
619 sc->sc_ac_cookie_len = ac_cookie_len;
620 MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
621 }
622 MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
623 tcpip_untimeout(pppoe_timeout, sc);
624 sc->sc_padr_retried = 0;
625 sc->sc_state = PPPOE_STATE_PADR_SENT;
626 if ((err = pppoe_send_padr(sc)) != 0) {
627 PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": failed to send PADR, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
628 }
629 tcpip_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
630 break;
631 case PPPOE_CODE_PADS:
632 if (sc == NULL) {
633 goto done;
634 }
635 sc->sc_session = session;
636 tcpip_untimeout(pppoe_timeout, sc);
637 PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": session 0x%x connected\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, session));
638 sc->sc_state = PPPOE_STATE_SESSION;
639 tcpip_timeout (100, pppoe_linkstatus_up, sc); /* notify upper layers */
640 break;
641 case PPPOE_CODE_PADT:
642 if (sc == NULL) {
643 goto done;
644 }
645 pppoe_clear_softc(sc, "received PADT");
646 break;
647 default:
648 if(sc) {
649 printf("%c%c%"U16_F": unknown code (0x%04x) session = 0x%04x\n",
650 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
651 ph->code, session);
652 } else {
653 printf("pppoe: unknown code (0x%04x) session = 0x%04x\n", ph->code, session);
654 }
655 break;
656 }
657
658done:
659 pbuf_free(pb);
660 return;
661}
662
663void
664pppoe_disc_input(struct netif *netif, struct pbuf *p)
665{
666 /* avoid error messages if there is not a single pppoe instance */
667 if (!LIST_EMPTY(&pppoe_softc_list)) {
668 pppoe_dispatch_disc_pkt(netif, p);
669 } else {
670 pbuf_free(p);
671 }
672}
673
674void
675pppoe_data_input(struct netif *netif, struct pbuf *pb)
676{
677 u16_t session, plen;
678 struct pppoe_softc *sc;
679 struct pppoehdr *ph;
680#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
681 u8_t shost[ETHER_ADDR_LEN];
682#endif
683
684#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
685 MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
686#endif
687 if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
688 /* bail out */
689 PPPDEBUG((LOG_ERR, "pppoe_data_input: pbuf_header failed\n"));
690 LINK_STATS_INC(link.lenerr);
691 goto drop;
692 }
693
694 pb = pppSingleBuf (pb);
695
696 if (pb->len <= PPPOE_HEADERLEN) {
697 printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
698 goto drop;
699 }
700
701 if (pb->len < sizeof(*ph)) {
702 printf("pppoe_data_input: could not get PPPoE header\n");
703 goto drop;
704 }
705 ph = (struct pppoehdr *)pb->payload;
706
707 if (ph->vertype != PPPOE_VERTYPE) {
708 printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
709 goto drop;
710 }
711 if (ph->code != 0) {
712 goto drop;
713 }
714
715 session = ntohs(ph->session);
716 sc = pppoe_find_softc_by_session(session, netif);
717 if (sc == NULL) {
718#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
719 printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
720 pppoe_send_padt(netif, session, shost);
721#endif
722 goto drop;
723 }
724
725 plen = ntohs(ph->plen);
726
727 if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
728 /* bail out */
729 PPPDEBUG((LOG_ERR, "pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
730 LINK_STATS_INC(link.lenerr);
731 goto drop;
732 }
733
734 PPPDEBUG((LOG_DEBUG, "pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
735 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
736 pb->len, plen));
737
738 if (pb->len < plen) {
739 goto drop;
740 }
741
742 pppInProcOverEthernet(sc->sc_pd, pb);
743
744 return;
745
746drop:
747 pbuf_free(pb);
748}
749
750static err_t
751pppoe_output(struct pppoe_softc *sc, struct pbuf *pb)
752{
753 struct eth_hdr *ethhdr;
754 u16_t etype;
755 err_t res;
756
757 if (!sc->sc_ethif) {
758 pbuf_free(pb);
759 return ERR_IF;
760 }
761
762 ethhdr = (struct eth_hdr *)pb->payload;
763 etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
764 ethhdr->type = htons(etype);
765 MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
766 MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
767
768 PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F" (%x) state=%d, session=0x%x output -> %02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F", len=%d\n",
769 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
770 sc->sc_state, sc->sc_session,
771 sc->sc_dest.addr[0], sc->sc_dest.addr[1], sc->sc_dest.addr[2], sc->sc_dest.addr[3], sc->sc_dest.addr[4], sc->sc_dest.addr[5],
772 pb->tot_len));
773
774 res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
775
776 pbuf_free(pb);
777
778 return res;
779}
780
781static err_t
782pppoe_send_padi(struct pppoe_softc *sc)
783{
784 struct pbuf *pb;
785 u8_t *p;
786 int len, l1 = 0, l2 = 0; /* XXX: gcc */
787
788 if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
789 PPPDEBUG((LOG_ERR, "ERROR: pppoe_send_padi in state %d", sc->sc_state));
790 }
791
792 /* calculate length of frame (excluding ethernet header + pppoe header) */
793 len = 2 + 2 + 2 + 2 + sizeof sc; /* service name tag is required, host unique is send too */
794 if (sc->sc_service_name != NULL) {
795 l1 = strlen(sc->sc_service_name);
796 len += l1;
797 }
798 if (sc->sc_concentrator_name != NULL) {
799 l2 = strlen(sc->sc_concentrator_name);
800 len += 2 + 2 + l2;
801 }
802
803 /* allocate a buffer */
804 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
805 if (!pb) {
806 return ERR_MEM;
807 }
808
809 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
810 /* fill in pkt */
811 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, len);
812 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
813 if (sc->sc_service_name != NULL) {
814 PPPOE_ADD_16(p, l1);
815 MEMCPY(p, sc->sc_service_name, l1);
816 p += l1;
817 } else {
818 PPPOE_ADD_16(p, 0);
819 }
820 if (sc->sc_concentrator_name != NULL) {
821 PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
822 PPPOE_ADD_16(p, l2);
823 MEMCPY(p, sc->sc_concentrator_name, l2);
824 p += l2;
825 }
826 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
827 PPPOE_ADD_16(p, sizeof(sc));
828 MEMCPY(p, &sc, sizeof sc);
829
830 /* send pkt */
831 return pppoe_output(sc, pb);
832}
833
834static void
835pppoe_timeout(void *arg)
836{
837 int retry_wait, err;
838 struct pppoe_softc *sc = (struct pppoe_softc*)arg;
839
840 PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": timeout\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
841
842 switch (sc->sc_state) {
843 case PPPOE_STATE_PADI_SENT:
844 /*
845 * We have two basic ways of retrying:
846 * - Quick retry mode: try a few times in short sequence
847 * - Slow retry mode: we already had a connection successfully
848 * established and will try infinitely (without user
849 * intervention)
850 * We only enter slow retry mode if IFF_LINK1 (aka autodial)
851 * is not set.
852 */
853
854 /* initialize for quick retry mode */
855 retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
856
857 sc->sc_padi_retried++;
858 if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
859#if 0
860 if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
861 /* slow retry mode */
862 retry_wait = PPPOE_SLOW_RETRY;
863 } else
864#endif
865 {
866 pppoe_abort_connect(sc);
867 return;
868 }
869 }
870 if ((err = pppoe_send_padi(sc)) != 0) {
871 sc->sc_padi_retried--;
872 PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": failed to transmit PADI, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
873 }
874 tcpip_timeout(retry_wait, pppoe_timeout, sc);
875 break;
876
877 case PPPOE_STATE_PADR_SENT:
878 sc->sc_padr_retried++;
879 if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
880 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
881 sc->sc_state = PPPOE_STATE_PADI_SENT;
882 sc->sc_padr_retried = 0;
883 if ((err = pppoe_send_padi(sc)) != 0) {
884 PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": failed to send PADI, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
885 }
886 tcpip_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
887 return;
888 }
889 if ((err = pppoe_send_padr(sc)) != 0) {
890 sc->sc_padr_retried--;
891 PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": failed to send PADR, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
892 }
893 tcpip_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
894 break;
895 case PPPOE_STATE_CLOSING:
896 pppoe_do_disconnect(sc);
897 break;
898 default:
899 return; /* all done, work in peace */
900 }
901}
902
903/* Start a connection (i.e. initiate discovery phase) */
904int
905pppoe_connect(struct pppoe_softc *sc)
906{
907 int err;
908
909 if (sc->sc_state != PPPOE_STATE_INITIAL) {
910 return EBUSY;
911 }
912
913#ifdef PPPOE_SERVER
914 /* wait PADI if IFF_PASSIVE */
915 if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
916 return 0;
917 }
918#endif
919 /* save state, in case we fail to send PADI */
920 sc->sc_state = PPPOE_STATE_PADI_SENT;
921 sc->sc_padr_retried = 0;
922 err = pppoe_send_padi(sc);
923 PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": failed to send PADI, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
924 tcpip_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
925 return err;
926}
927
928/* disconnect */
929void
930pppoe_disconnect(struct pppoe_softc *sc)
931{
932 if (sc->sc_state < PPPOE_STATE_SESSION) {
933 return;
934 }
935 /*
936 * Do not call pppoe_disconnect here, the upper layer state
937 * machine gets confused by this. We must return from this
938 * function and defer disconnecting to the timeout handler.
939 */
940 sc->sc_state = PPPOE_STATE_CLOSING;
941 tcpip_timeout(20, pppoe_timeout, sc);
942}
943
944static int
945pppoe_do_disconnect(struct pppoe_softc *sc)
946{
947 int err;
948
949 if (sc->sc_state < PPPOE_STATE_SESSION) {
950 err = EBUSY;
951 } else {
952 PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": disconnecting\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
953 err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
954 }
955
956 /* cleanup softc */
957 sc->sc_state = PPPOE_STATE_INITIAL;
958 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
959 if (sc->sc_ac_cookie) {
960 mem_free(sc->sc_ac_cookie);
961 sc->sc_ac_cookie = NULL;
962 }
963 sc->sc_ac_cookie_len = 0;
964#ifdef PPPOE_SERVER
965 if (sc->sc_hunique) {
966 mem_free(sc->sc_hunique);
967 sc->sc_hunique = NULL;
968 }
969 sc->sc_hunique_len = 0;
970#endif
971 sc->sc_session = 0;
972
973 sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
974
975 return err;
976}
977
978/* Connection attempt aborted */
979static void
980pppoe_abort_connect(struct pppoe_softc *sc)
981{
982 printf("%c%c%"U16_F": could not establish connection\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
983 sc->sc_state = PPPOE_STATE_CLOSING;
984
985 sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
986
987 /* clear connection state */
988 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
989 sc->sc_state = PPPOE_STATE_INITIAL;
990}
991
992/* Send a PADR packet */
993static err_t
994pppoe_send_padr(struct pppoe_softc *sc)
995{
996 struct pbuf *pb;
997 u8_t *p;
998 size_t len, l1 = 0; /* XXX: gcc */
999
1000 if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
1001 return ERR_CONN;
1002 }
1003
1004 len = 2 + 2 + 2 + 2 + sizeof(sc); /* service name, host unique */
1005 if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
1006 l1 = strlen(sc->sc_service_name);
1007 len += l1;
1008 }
1009 if (sc->sc_ac_cookie_len > 0) {
1010 len += 2 + 2 + sc->sc_ac_cookie_len; /* AC cookie */
1011 }
1012 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
1013 if (!pb) {
1014 return ERR_MEM;
1015 }
1016 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
1017 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
1018 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
1019 if (sc->sc_service_name != NULL) {
1020 PPPOE_ADD_16(p, l1);
1021 MEMCPY(p, sc->sc_service_name, l1);
1022 p += l1;
1023 } else {
1024 PPPOE_ADD_16(p, 0);
1025 }
1026 if (sc->sc_ac_cookie_len > 0) {
1027 PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
1028 PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
1029 MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
1030 p += sc->sc_ac_cookie_len;
1031 }
1032 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
1033 PPPOE_ADD_16(p, sizeof(sc));
1034 MEMCPY(p, &sc, sizeof sc);
1035
1036 return pppoe_output(sc, pb);
1037}
1038
1039/* send a PADT packet */
1040static err_t
1041pppoe_send_padt(struct netif *outgoing_if, u_int session, const u8_t *dest)
1042{
1043 struct pbuf *pb;
1044 struct eth_hdr *ethhdr;
1045 err_t res;
1046 u8_t *p;
1047
1048 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
1049 if (!pb) {
1050 return ERR_MEM;
1051 }
1052
1053 ethhdr = (struct eth_hdr *)pb->payload;
1054 ethhdr->type = htons(ETHTYPE_PPPOEDISC);
1055 MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
1056 MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
1057
1058 p = (u8_t*)(ethhdr + 1);
1059 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
1060
1061 res = outgoing_if->linkoutput(outgoing_if, pb);
1062
1063 pbuf_free(pb);
1064
1065 return res;
1066}
1067
1068#ifdef PPPOE_SERVER
1069static err_t
1070pppoe_send_pado(struct pppoe_softc *sc)
1071{
1072 struct pbuf *pb;
1073 u8_t *p;
1074 size_t len;
1075
1076 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
1077 return ERR_CONN;
1078 }
1079
1080 /* calc length */
1081 len = 0;
1082 /* include ac_cookie */
1083 len += 2 + 2 + sizeof(sc);
1084 /* include hunique */
1085 len += 2 + 2 + sc->sc_hunique_len;
1086 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
1087 if (!pb) {
1088 return ERR_MEM;
1089 }
1090 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
1091 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
1092 PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
1093 PPPOE_ADD_16(p, sizeof(sc));
1094 MEMCPY(p, &sc, sizeof(sc));
1095 p += sizeof(sc);
1096 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
1097 PPPOE_ADD_16(p, sc->sc_hunique_len);
1098 MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
1099 return pppoe_output(sc, pb);
1100}
1101
1102static err_t
1103pppoe_send_pads(struct pppoe_softc *sc)
1104{
1105 struct pbuf *pb;
1106 u8_t *p;
1107 size_t len, l1 = 0; /* XXX: gcc */
1108
1109 if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
1110 return ERR_CONN;
1111 }
1112
1113 sc->sc_session = mono_time.tv_sec % 0xff + 1;
1114 /* calc length */
1115 len = 0;
1116 /* include hunique */
1117 len += 2 + 2 + 2 + 2 + sc->sc_hunique_len; /* service name, host unique*/
1118 if (sc->sc_service_name != NULL) { /* service name tag maybe empty */
1119 l1 = strlen(sc->sc_service_name);
1120 len += l1;
1121 }
1122 pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
1123 if (!pb) {
1124 return ERR_MEM;
1125 }
1126 p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
1127 PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
1128 PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
1129 if (sc->sc_service_name != NULL) {
1130 PPPOE_ADD_16(p, l1);
1131 MEMCPY(p, sc->sc_service_name, l1);
1132 p += l1;
1133 } else {
1134 PPPOE_ADD_16(p, 0);
1135 }
1136 PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
1137 PPPOE_ADD_16(p, sc->sc_hunique_len);
1138 MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
1139 return pppoe_output(sc, pb);
1140}
1141#endif
1142
1143err_t
1144pppoe_xmit(struct pppoe_softc *sc, struct pbuf *pb)
1145{
1146 u8_t *p;
1147 size_t len;
1148
1149 /* are we ready to process data yet? */
1150 if (sc->sc_state < PPPOE_STATE_SESSION) {
1151 /*sppp_flush(&sc->sc_sppp.pp_if);*/
1152 pbuf_free(pb);
1153 return ERR_CONN;
1154 }
1155
1156 len = pb->tot_len;
1157
1158 /* make room for Ethernet header - should not fail */
1159 if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
1160 /* bail out */
1161 PPPDEBUG((LOG_ERR, "pppoe: %c%c%"U16_F": pppoe_xmit: could not allocate room for header\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
1162 LINK_STATS_INC(link.lenerr);
1163 pbuf_free(pb);
1164 return ERR_BUF;
1165 }
1166
1167 p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
1168 PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
1169
1170 return pppoe_output(sc, pb);
1171}
1172
1173#if 0 /*def PFIL_HOOKS*/
1174static int
1175pppoe_ifattach_hook(void *arg, struct pbuf **mp, struct netif *ifp, int dir)
1176{
1177 struct pppoe_softc *sc;
1178 int s;
1179
1180 if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
1181 return 0;
1182 }
1183
1184 LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
1185 if (sc->sc_ethif != ifp) {
1186 continue;
1187 }
1188 if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
1189 sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP|IFF_RUNNING);
1190 printf("%c%c%"U16_F": ethernet interface detached, going down\n",
1191 sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
1192 }
1193 sc->sc_ethif = NULL;
1194 pppoe_clear_softc(sc, "ethernet interface detached");
1195 }
1196
1197 return 0;
1198}
1199#endif
1200
1201static void
1202pppoe_clear_softc(struct pppoe_softc *sc, const char *message)
1203{
1204 LWIP_UNUSED_ARG(message);
1205
1206 /* stop timer */
1207 tcpip_untimeout(pppoe_timeout, sc);
1208 PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": session 0x%x terminated, %s\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_session, message));
1209
1210 /* fix our state */
1211 sc->sc_state = PPPOE_STATE_INITIAL;
1212
1213 /* notify upper layers */
1214 sc->sc_linkStatusCB(sc->sc_pd, 0);
1215
1216 /* clean up softc */
1217 MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
1218 if (sc->sc_ac_cookie) {
1219 mem_free(sc->sc_ac_cookie);
1220 sc->sc_ac_cookie = NULL;
1221 }
1222 sc->sc_ac_cookie_len = 0;
1223 sc->sc_session = 0;
1224}
1225
1226#endif /* PPPOE_SUPPORT */
1227
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