Joshua Wise's Git repositories - netwatch.git/blob

1 /*****************************************************************************

2 * ppp_oe.c - PPP Over Ethernet implementation for lwIP.

3 *

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 *****************************************************************************/

33 /* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */

35 /*-

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 */

71 #include "lwip/opt.h"

73 #if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */

75 #include "ppp.h"

76 #include "pppdebug.h"

78 #include "lwip/sys.h"

80 #include "netif/ppp_oe.h"

81 #include "netif/etharp.h"

83 #include <string.h>

84 #include <stdio.h>

86 /** @todo Replace this part with a simple list like other lwIP lists */

87 #ifndef _SYS_QUEUE_H_

88 #define _SYS_QUEUE_H_

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) \

105 struct name { \

106 struct type *lh_first; /* first element */ \

107 }

108

109 #define LIST_HEAD_INITIALIZER(head) \

110 { NULL }

111

112 #define LIST_ENTRY(type) \

113 struct { \

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

191 struct 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 */

214 static void pppoe_dispatch_disc_pkt(struct netif *, struct pbuf *);

215

216 /* management routines */

217 static int pppoe_do_disconnect(struct pppoe_softc *);

218 static void pppoe_abort_connect(struct pppoe_softc *);

219 static void pppoe_clear_softc(struct pppoe_softc *, const char *);

220

221 /* internal timeout handling */

222 static void pppoe_timeout(void *);

223

224 /* sending actual protocol controll packets */

225 static err_t pppoe_send_padi(struct pppoe_softc *);

226 static err_t pppoe_send_padr(struct pppoe_softc *);

227 #ifdef PPPOE_SERVER

228 static err_t pppoe_send_pado(struct pppoe_softc *);

229 static err_t pppoe_send_pads(struct pppoe_softc *);

230 #endif

231 static err_t pppoe_send_padt(struct netif *, u_int, const u8_t *);

232

233 /* internal helper functions */

234 static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);

235 static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t *, size_t, struct netif *);

236

237 static LIST_HEAD(pppoe_softc_head, pppoe_softc) pppoe_softc_list;

238

239 int pppoe_hdrlen;

240

241 void

242 pppoe_init(void)

243 {

244 pppoe_hdrlen = sizeof(struct eth_hdr) + PPPOE_HEADERLEN;

245 LIST_INIT(&pppoe_softc_list);

246 }

247

248 err_t

249 pppoe_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

274 err_t

275 pppoe_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 */

312 static struct pppoe_softc *

313 pppoe_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. */

336 static struct pppoe_softc *

337 pppoe_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

375 static void

376 pppoe_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 */

384 static void

385 pppoe_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

516 breakbreak:;

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

658 done:

659 pbuf_free(pb);

660 return;

661 }

662

663 void

664 pppoe_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

674 void

675 pppoe_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

746 drop:

747 pbuf_free(pb);

748 }

749

750 static err_t

751 pppoe_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

781 static err_t

782 pppoe_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

834 static void

835 pppoe_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) */

904 int

905 pppoe_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 */

929 void

930 pppoe_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

944 static int

945 pppoe_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 */

979 static void

980 pppoe_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 */

993 static err_t

994 pppoe_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 */

1040 static err_t

1041 pppoe_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

1069 static err_t

1070 pppoe_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

1102 static err_t

1103 pppoe_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

1143 err_t

1144 pppoe_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*/

1174 static int

1175 pppoe_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

1201 static void

1202 pppoe_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;