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/drivers/isdn/hisax/isdnl2.c

http://github.com/mirrors/linux
C | 1839 lines | 1572 code | 247 blank | 20 comment | 256 complexity | cd9e461e4d4c58920245acb940f1c382 MD5 | raw file
   1/* $Id: isdnl2.c,v 2.30.2.4 2004/02/11 13:21:34 keil Exp $
   2 *
   3 * Author       Karsten Keil
   4 *              based on the teles driver from Jan den Ouden
   5 * Copyright    by Karsten Keil      <keil@isdn4linux.de>
   6 *
   7 * This software may be used and distributed according to the terms
   8 * of the GNU General Public License, incorporated herein by reference.
   9 *
  10 * For changes and modifications please read
  11 * Documentation/isdn/HiSax.cert
  12 *
  13 * Thanks to    Jan den Ouden
  14 *              Fritz Elfert
  15 *
  16 */
  17
  18#include <linux/init.h>
  19#include <linux/gfp.h>
  20#include "hisax.h"
  21#include "isdnl2.h"
  22
  23const char *l2_revision = "$Revision: 2.30.2.4 $";
  24
  25static void l2m_debug(struct FsmInst *fi, char *fmt, ...);
  26
  27static struct Fsm l2fsm;
  28
  29enum {
  30	ST_L2_1,
  31	ST_L2_2,
  32	ST_L2_3,
  33	ST_L2_4,
  34	ST_L2_5,
  35	ST_L2_6,
  36	ST_L2_7,
  37	ST_L2_8,
  38};
  39
  40#define L2_STATE_COUNT (ST_L2_8 + 1)
  41
  42static char *strL2State[] =
  43{
  44	"ST_L2_1",
  45	"ST_L2_2",
  46	"ST_L2_3",
  47	"ST_L2_4",
  48	"ST_L2_5",
  49	"ST_L2_6",
  50	"ST_L2_7",
  51	"ST_L2_8",
  52};
  53
  54enum {
  55	EV_L2_UI,
  56	EV_L2_SABME,
  57	EV_L2_DISC,
  58	EV_L2_DM,
  59	EV_L2_UA,
  60	EV_L2_FRMR,
  61	EV_L2_SUPER,
  62	EV_L2_I,
  63	EV_L2_DL_DATA,
  64	EV_L2_ACK_PULL,
  65	EV_L2_DL_UNIT_DATA,
  66	EV_L2_DL_ESTABLISH_REQ,
  67	EV_L2_DL_RELEASE_REQ,
  68	EV_L2_MDL_ASSIGN,
  69	EV_L2_MDL_REMOVE,
  70	EV_L2_MDL_ERROR,
  71	EV_L1_DEACTIVATE,
  72	EV_L2_T200,
  73	EV_L2_T203,
  74	EV_L2_SET_OWN_BUSY,
  75	EV_L2_CLEAR_OWN_BUSY,
  76	EV_L2_FRAME_ERROR,
  77};
  78
  79#define L2_EVENT_COUNT (EV_L2_FRAME_ERROR + 1)
  80
  81static char *strL2Event[] =
  82{
  83	"EV_L2_UI",
  84	"EV_L2_SABME",
  85	"EV_L2_DISC",
  86	"EV_L2_DM",
  87	"EV_L2_UA",
  88	"EV_L2_FRMR",
  89	"EV_L2_SUPER",
  90	"EV_L2_I",
  91	"EV_L2_DL_DATA",
  92	"EV_L2_ACK_PULL",
  93	"EV_L2_DL_UNIT_DATA",
  94	"EV_L2_DL_ESTABLISH_REQ",
  95	"EV_L2_DL_RELEASE_REQ",
  96	"EV_L2_MDL_ASSIGN",
  97	"EV_L2_MDL_REMOVE",
  98	"EV_L2_MDL_ERROR",
  99	"EV_L1_DEACTIVATE",
 100	"EV_L2_T200",
 101	"EV_L2_T203",
 102	"EV_L2_SET_OWN_BUSY",
 103	"EV_L2_CLEAR_OWN_BUSY",
 104	"EV_L2_FRAME_ERROR",
 105};
 106
 107static int l2addrsize(struct Layer2 *l2);
 108
 109static void
 110set_peer_busy(struct Layer2 *l2) {
 111	test_and_set_bit(FLG_PEER_BUSY, &l2->flag);
 112	if (!skb_queue_empty(&l2->i_queue) ||
 113	    !skb_queue_empty(&l2->ui_queue))
 114		test_and_set_bit(FLG_L2BLOCK, &l2->flag);
 115}
 116
 117static void
 118clear_peer_busy(struct Layer2 *l2) {
 119	if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag))
 120		test_and_clear_bit(FLG_L2BLOCK, &l2->flag);
 121}
 122
 123static void
 124InitWin(struct Layer2 *l2)
 125{
 126	int i;
 127
 128	for (i = 0; i < MAX_WINDOW; i++)
 129		l2->windowar[i] = NULL;
 130}
 131
 132static int
 133freewin1(struct Layer2 *l2)
 134{
 135	int i, cnt = 0;
 136
 137	for (i = 0; i < MAX_WINDOW; i++) {
 138		if (l2->windowar[i]) {
 139			cnt++;
 140			dev_kfree_skb(l2->windowar[i]);
 141			l2->windowar[i] = NULL;
 142		}
 143	}
 144	return cnt;
 145}
 146
 147static inline void
 148freewin(struct PStack *st)
 149{
 150	freewin1(&st->l2);
 151}
 152
 153static void
 154ReleaseWin(struct Layer2 *l2)
 155{
 156	int cnt;
 157
 158	if ((cnt = freewin1(l2)))
 159		printk(KERN_WARNING "isdl2 freed %d skbuffs in release\n", cnt);
 160}
 161
 162static inline unsigned int
 163cansend(struct PStack *st)
 164{
 165	unsigned int p1;
 166
 167	if (test_bit(FLG_MOD128, &st->l2.flag))
 168		p1 = (st->l2.vs - st->l2.va) % 128;
 169	else
 170		p1 = (st->l2.vs - st->l2.va) % 8;
 171	return ((p1 < st->l2.window) && !test_bit(FLG_PEER_BUSY, &st->l2.flag));
 172}
 173
 174static inline void
 175clear_exception(struct Layer2 *l2)
 176{
 177	test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
 178	test_and_clear_bit(FLG_REJEXC, &l2->flag);
 179	test_and_clear_bit(FLG_OWN_BUSY, &l2->flag);
 180	clear_peer_busy(l2);
 181}
 182
 183static inline int
 184l2headersize(struct Layer2 *l2, int ui)
 185{
 186	return (((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) +
 187		(test_bit(FLG_LAPD, &l2->flag) ? 2 : 1));
 188}
 189
 190inline int
 191l2addrsize(struct Layer2 *l2)
 192{
 193	return (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1);
 194}
 195
 196static int
 197sethdraddr(struct Layer2 *l2, u_char *header, int rsp)
 198{
 199	u_char *ptr = header;
 200	int crbit = rsp;
 201
 202	if (test_bit(FLG_LAPD, &l2->flag)) {
 203		*ptr++ = (l2->sap << 2) | (rsp ? 2 : 0);
 204		*ptr++ = (l2->tei << 1) | 1;
 205		return (2);
 206	} else {
 207		if (test_bit(FLG_ORIG, &l2->flag))
 208			crbit = !crbit;
 209		if (crbit)
 210			*ptr++ = 1;
 211		else
 212			*ptr++ = 3;
 213		return (1);
 214	}
 215}
 216
 217static inline void
 218enqueue_super(struct PStack *st,
 219	      struct sk_buff *skb)
 220{
 221	if (test_bit(FLG_LAPB, &st->l2.flag))
 222		st->l1.bcs->tx_cnt += skb->len;
 223	st->l2.l2l1(st, PH_DATA | REQUEST, skb);
 224}
 225
 226#define enqueue_ui(a, b) enqueue_super(a, b)
 227
 228static inline int
 229IsUI(u_char *data)
 230{
 231	return ((data[0] & 0xef) == UI);
 232}
 233
 234static inline int
 235IsUA(u_char *data)
 236{
 237	return ((data[0] & 0xef) == UA);
 238}
 239
 240static inline int
 241IsDM(u_char *data)
 242{
 243	return ((data[0] & 0xef) == DM);
 244}
 245
 246static inline int
 247IsDISC(u_char *data)
 248{
 249	return ((data[0] & 0xef) == DISC);
 250}
 251
 252static inline int
 253IsSFrame(u_char *data, struct PStack *st)
 254{
 255	register u_char d = *data;
 256
 257	if (!test_bit(FLG_MOD128, &st->l2.flag))
 258		d &= 0xf;
 259	return (((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c));
 260}
 261
 262static inline int
 263IsSABME(u_char *data, struct PStack *st)
 264{
 265	u_char d = data[0] & ~0x10;
 266
 267	return (test_bit(FLG_MOD128, &st->l2.flag) ? d == SABME : d == SABM);
 268}
 269
 270static inline int
 271IsREJ(u_char *data, struct PStack *st)
 272{
 273	return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == REJ : (data[0] & 0xf) == REJ);
 274}
 275
 276static inline int
 277IsFRMR(u_char *data)
 278{
 279	return ((data[0] & 0xef) == FRMR);
 280}
 281
 282static inline int
 283IsRNR(u_char *data, struct PStack *st)
 284{
 285	return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == RNR : (data[0] & 0xf) == RNR);
 286}
 287
 288static int
 289iframe_error(struct PStack *st, struct sk_buff *skb)
 290{
 291	int i = l2addrsize(&st->l2) + (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1);
 292	int rsp = *skb->data & 0x2;
 293
 294	if (test_bit(FLG_ORIG, &st->l2.flag))
 295		rsp = !rsp;
 296
 297	if (rsp)
 298		return 'L';
 299
 300
 301	if (skb->len < i)
 302		return 'N';
 303
 304	if ((skb->len - i) > st->l2.maxlen)
 305		return 'O';
 306
 307
 308	return 0;
 309}
 310
 311static int
 312super_error(struct PStack *st, struct sk_buff *skb)
 313{
 314	if (skb->len != l2addrsize(&st->l2) +
 315	    (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1))
 316		return 'N';
 317
 318	return 0;
 319}
 320
 321static int
 322unnum_error(struct PStack *st, struct sk_buff *skb, int wantrsp)
 323{
 324	int rsp = (*skb->data & 0x2) >> 1;
 325	if (test_bit(FLG_ORIG, &st->l2.flag))
 326		rsp = !rsp;
 327
 328	if (rsp != wantrsp)
 329		return 'L';
 330
 331	if (skb->len != l2addrsize(&st->l2) + 1)
 332		return 'N';
 333
 334	return 0;
 335}
 336
 337static int
 338UI_error(struct PStack *st, struct sk_buff *skb)
 339{
 340	int rsp = *skb->data & 0x2;
 341	if (test_bit(FLG_ORIG, &st->l2.flag))
 342		rsp = !rsp;
 343
 344	if (rsp)
 345		return 'L';
 346
 347	if (skb->len > st->l2.maxlen + l2addrsize(&st->l2) + 1)
 348		return 'O';
 349
 350	return 0;
 351}
 352
 353static int
 354FRMR_error(struct PStack *st, struct sk_buff *skb)
 355{
 356	int headers = l2addrsize(&st->l2) + 1;
 357	u_char *datap = skb->data + headers;
 358	int rsp = *skb->data & 0x2;
 359
 360	if (test_bit(FLG_ORIG, &st->l2.flag))
 361		rsp = !rsp;
 362
 363	if (!rsp)
 364		return 'L';
 365
 366	if (test_bit(FLG_MOD128, &st->l2.flag)) {
 367		if (skb->len < headers + 5)
 368			return 'N';
 369		else
 370			l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x %2x %2x",
 371				  datap[0], datap[1], datap[2],
 372				  datap[3], datap[4]);
 373	} else {
 374		if (skb->len < headers + 3)
 375			return 'N';
 376		else
 377			l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x",
 378				  datap[0], datap[1], datap[2]);
 379	}
 380
 381	return 0;
 382}
 383
 384static unsigned int
 385legalnr(struct PStack *st, unsigned int nr)
 386{
 387	struct Layer2 *l2 = &st->l2;
 388
 389	if (test_bit(FLG_MOD128, &l2->flag))
 390		return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128);
 391	else
 392		return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8);
 393}
 394
 395static void
 396setva(struct PStack *st, unsigned int nr)
 397{
 398	struct Layer2 *l2 = &st->l2;
 399	int len;
 400	u_long flags;
 401
 402	spin_lock_irqsave(&l2->lock, flags);
 403	while (l2->va != nr) {
 404		(l2->va)++;
 405		if (test_bit(FLG_MOD128, &l2->flag))
 406			l2->va %= 128;
 407		else
 408			l2->va %= 8;
 409		len = l2->windowar[l2->sow]->len;
 410		if (PACKET_NOACK == l2->windowar[l2->sow]->pkt_type)
 411			len = -1;
 412		dev_kfree_skb(l2->windowar[l2->sow]);
 413		l2->windowar[l2->sow] = NULL;
 414		l2->sow = (l2->sow + 1) % l2->window;
 415		spin_unlock_irqrestore(&l2->lock, flags);
 416		if (test_bit(FLG_LLI_L2WAKEUP, &st->lli.flag) && (len >= 0))
 417			lli_writewakeup(st, len);
 418		spin_lock_irqsave(&l2->lock, flags);
 419	}
 420	spin_unlock_irqrestore(&l2->lock, flags);
 421}
 422
 423static void
 424send_uframe(struct PStack *st, u_char cmd, u_char cr)
 425{
 426	struct sk_buff *skb;
 427	u_char tmp[MAX_HEADER_LEN];
 428	int i;
 429
 430	i = sethdraddr(&st->l2, tmp, cr);
 431	tmp[i++] = cmd;
 432	if (!(skb = alloc_skb(i, GFP_ATOMIC))) {
 433		printk(KERN_WARNING "isdl2 can't alloc sbbuff for send_uframe\n");
 434		return;
 435	}
 436	memcpy(skb_put(skb, i), tmp, i);
 437	enqueue_super(st, skb);
 438}
 439
 440static inline u_char
 441get_PollFlag(struct PStack *st, struct sk_buff *skb)
 442{
 443	return (skb->data[l2addrsize(&(st->l2))] & 0x10);
 444}
 445
 446static inline u_char
 447get_PollFlagFree(struct PStack *st, struct sk_buff *skb)
 448{
 449	u_char PF;
 450
 451	PF = get_PollFlag(st, skb);
 452	dev_kfree_skb(skb);
 453	return (PF);
 454}
 455
 456static inline void
 457start_t200(struct PStack *st, int i)
 458{
 459	FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i);
 460	test_and_set_bit(FLG_T200_RUN, &st->l2.flag);
 461}
 462
 463static inline void
 464restart_t200(struct PStack *st, int i)
 465{
 466	FsmRestartTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i);
 467	test_and_set_bit(FLG_T200_RUN, &st->l2.flag);
 468}
 469
 470static inline void
 471stop_t200(struct PStack *st, int i)
 472{
 473	if (test_and_clear_bit(FLG_T200_RUN, &st->l2.flag))
 474		FsmDelTimer(&st->l2.t200, i);
 475}
 476
 477static inline void
 478st5_dl_release_l2l3(struct PStack *st)
 479{
 480	int pr;
 481
 482	if (test_and_clear_bit(FLG_PEND_REL, &st->l2.flag))
 483		pr = DL_RELEASE | CONFIRM;
 484	else
 485		pr = DL_RELEASE | INDICATION;
 486
 487	st->l2.l2l3(st, pr, NULL);
 488}
 489
 490static inline void
 491lapb_dl_release_l2l3(struct PStack *st, int f)
 492{
 493	if (test_bit(FLG_LAPB, &st->l2.flag))
 494		st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
 495	st->l2.l2l3(st, DL_RELEASE | f, NULL);
 496}
 497
 498static void
 499establishlink(struct FsmInst *fi)
 500{
 501	struct PStack *st = fi->userdata;
 502	u_char cmd;
 503
 504	clear_exception(&st->l2);
 505	st->l2.rc = 0;
 506	cmd = (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM) | 0x10;
 507	send_uframe(st, cmd, CMD);
 508	FsmDelTimer(&st->l2.t203, 1);
 509	restart_t200(st, 1);
 510	test_and_clear_bit(FLG_PEND_REL, &st->l2.flag);
 511	freewin(st);
 512	FsmChangeState(fi, ST_L2_5);
 513}
 514
 515static void
 516l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg)
 517{
 518	struct sk_buff *skb = arg;
 519	struct PStack *st = fi->userdata;
 520
 521	if (get_PollFlagFree(st, skb))
 522		st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'C');
 523	else
 524		st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'D');
 525}
 526
 527static void
 528l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg)
 529{
 530	struct sk_buff *skb = arg;
 531	struct PStack *st = fi->userdata;
 532
 533	if (get_PollFlagFree(st, skb))
 534		st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B');
 535	else {
 536		st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E');
 537		establishlink(fi);
 538		test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
 539	}
 540}
 541
 542static void
 543l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg)
 544{
 545	struct sk_buff *skb = arg;
 546	struct PStack *st = fi->userdata;
 547
 548	if (get_PollFlagFree(st, skb))
 549		st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B');
 550	else {
 551		st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E');
 552	}
 553	establishlink(fi);
 554	test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
 555}
 556
 557static void
 558l2_go_st3(struct FsmInst *fi, int event, void *arg)
 559{
 560	FsmChangeState(fi, ST_L2_3);
 561}
 562
 563static void
 564l2_mdl_assign(struct FsmInst *fi, int event, void *arg)
 565{
 566	struct PStack *st = fi->userdata;
 567
 568	FsmChangeState(fi, ST_L2_3);
 569	st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL);
 570}
 571
 572static void
 573l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg)
 574{
 575	struct PStack *st = fi->userdata;
 576	struct sk_buff *skb = arg;
 577
 578	skb_queue_tail(&st->l2.ui_queue, skb);
 579	FsmChangeState(fi, ST_L2_2);
 580	st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL);
 581}
 582
 583static void
 584l2_queue_ui(struct FsmInst *fi, int event, void *arg)
 585{
 586	struct PStack *st = fi->userdata;
 587	struct sk_buff *skb = arg;
 588
 589	skb_queue_tail(&st->l2.ui_queue, skb);
 590}
 591
 592static void
 593tx_ui(struct PStack *st)
 594{
 595	struct sk_buff *skb;
 596	u_char header[MAX_HEADER_LEN];
 597	int i;
 598
 599	i = sethdraddr(&(st->l2), header, CMD);
 600	header[i++] = UI;
 601	while ((skb = skb_dequeue(&st->l2.ui_queue))) {
 602		memcpy(skb_push(skb, i), header, i);
 603		enqueue_ui(st, skb);
 604	}
 605}
 606
 607static void
 608l2_send_ui(struct FsmInst *fi, int event, void *arg)
 609{
 610	struct PStack *st = fi->userdata;
 611	struct sk_buff *skb = arg;
 612
 613	skb_queue_tail(&st->l2.ui_queue, skb);
 614	tx_ui(st);
 615}
 616
 617static void
 618l2_got_ui(struct FsmInst *fi, int event, void *arg)
 619{
 620	struct PStack *st = fi->userdata;
 621	struct sk_buff *skb = arg;
 622
 623	skb_pull(skb, l2headersize(&st->l2, 1));
 624	st->l2.l2l3(st, DL_UNIT_DATA | INDICATION, skb);
 625/*	^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 626 *		in states 1-3 for broadcast
 627 */
 628
 629
 630}
 631
 632static void
 633l2_establish(struct FsmInst *fi, int event, void *arg)
 634{
 635	struct PStack *st = fi->userdata;
 636
 637	establishlink(fi);
 638	test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
 639}
 640
 641static void
 642l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg)
 643{
 644	struct PStack *st = fi->userdata;
 645
 646	skb_queue_purge(&st->l2.i_queue);
 647	test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
 648	test_and_clear_bit(FLG_PEND_REL, &st->l2.flag);
 649}
 650
 651static void
 652l2_l3_reestablish(struct FsmInst *fi, int event, void *arg)
 653{
 654	struct PStack *st = fi->userdata;
 655
 656	skb_queue_purge(&st->l2.i_queue);
 657	establishlink(fi);
 658	test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
 659}
 660
 661static void
 662l2_release(struct FsmInst *fi, int event, void *arg)
 663{
 664	struct PStack *st = fi->userdata;
 665
 666	st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
 667}
 668
 669static void
 670l2_pend_rel(struct FsmInst *fi, int event, void *arg)
 671{
 672	struct PStack *st = fi->userdata;
 673
 674	test_and_set_bit(FLG_PEND_REL, &st->l2.flag);
 675}
 676
 677static void
 678l2_disconnect(struct FsmInst *fi, int event, void *arg)
 679{
 680	struct PStack *st = fi->userdata;
 681
 682	skb_queue_purge(&st->l2.i_queue);
 683	freewin(st);
 684	FsmChangeState(fi, ST_L2_6);
 685	st->l2.rc = 0;
 686	send_uframe(st, DISC | 0x10, CMD);
 687	FsmDelTimer(&st->l2.t203, 1);
 688	restart_t200(st, 2);
 689}
 690
 691static void
 692l2_start_multi(struct FsmInst *fi, int event, void *arg)
 693{
 694	struct PStack *st = fi->userdata;
 695	struct sk_buff *skb = arg;
 696
 697	send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
 698
 699	clear_exception(&st->l2);
 700	st->l2.vs = 0;
 701	st->l2.va = 0;
 702	st->l2.vr = 0;
 703	st->l2.sow = 0;
 704	FsmChangeState(fi, ST_L2_7);
 705	FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3);
 706
 707	st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL);
 708}
 709
 710static void
 711l2_send_UA(struct FsmInst *fi, int event, void *arg)
 712{
 713	struct PStack *st = fi->userdata;
 714	struct sk_buff *skb = arg;
 715
 716	send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
 717}
 718
 719static void
 720l2_send_DM(struct FsmInst *fi, int event, void *arg)
 721{
 722	struct PStack *st = fi->userdata;
 723	struct sk_buff *skb = arg;
 724
 725	send_uframe(st, DM | get_PollFlagFree(st, skb), RSP);
 726}
 727
 728static void
 729l2_restart_multi(struct FsmInst *fi, int event, void *arg)
 730{
 731	struct PStack *st = fi->userdata;
 732	struct sk_buff *skb = arg;
 733	int est = 0, state;
 734
 735	state = fi->state;
 736
 737	send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
 738
 739	st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'F');
 740
 741	if (st->l2.vs != st->l2.va) {
 742		skb_queue_purge(&st->l2.i_queue);
 743		est = 1;
 744	}
 745
 746	clear_exception(&st->l2);
 747	st->l2.vs = 0;
 748	st->l2.va = 0;
 749	st->l2.vr = 0;
 750	st->l2.sow = 0;
 751	FsmChangeState(fi, ST_L2_7);
 752	stop_t200(st, 3);
 753	FsmRestartTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3);
 754
 755	if (est)
 756		st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL);
 757
 758	if ((ST_L2_7 == state) || (ST_L2_8 == state))
 759		if (!skb_queue_empty(&st->l2.i_queue) && cansend(st))
 760			st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
 761}
 762
 763static void
 764l2_stop_multi(struct FsmInst *fi, int event, void *arg)
 765{
 766	struct PStack *st = fi->userdata;
 767	struct sk_buff *skb = arg;
 768
 769	FsmChangeState(fi, ST_L2_4);
 770	FsmDelTimer(&st->l2.t203, 3);
 771	stop_t200(st, 4);
 772
 773	send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
 774
 775	skb_queue_purge(&st->l2.i_queue);
 776	freewin(st);
 777	lapb_dl_release_l2l3(st, INDICATION);
 778}
 779
 780static void
 781l2_connected(struct FsmInst *fi, int event, void *arg)
 782{
 783	struct PStack *st = fi->userdata;
 784	struct sk_buff *skb = arg;
 785	int pr = -1;
 786
 787	if (!get_PollFlag(st, skb)) {
 788		l2_mdl_error_ua(fi, event, arg);
 789		return;
 790	}
 791	dev_kfree_skb(skb);
 792
 793	if (test_and_clear_bit(FLG_PEND_REL, &st->l2.flag))
 794		l2_disconnect(fi, event, arg);
 795
 796	if (test_and_clear_bit(FLG_L3_INIT, &st->l2.flag)) {
 797		pr = DL_ESTABLISH | CONFIRM;
 798	} else if (st->l2.vs != st->l2.va) {
 799		skb_queue_purge(&st->l2.i_queue);
 800		pr = DL_ESTABLISH | INDICATION;
 801	}
 802
 803	stop_t200(st, 5);
 804
 805	st->l2.vr = 0;
 806	st->l2.vs = 0;
 807	st->l2.va = 0;
 808	st->l2.sow = 0;
 809	FsmChangeState(fi, ST_L2_7);
 810	FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 4);
 811
 812	if (pr != -1)
 813		st->l2.l2l3(st, pr, NULL);
 814
 815	if (!skb_queue_empty(&st->l2.i_queue) && cansend(st))
 816		st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
 817}
 818
 819static void
 820l2_released(struct FsmInst *fi, int event, void *arg)
 821{
 822	struct PStack *st = fi->userdata;
 823	struct sk_buff *skb = arg;
 824
 825	if (!get_PollFlag(st, skb)) {
 826		l2_mdl_error_ua(fi, event, arg);
 827		return;
 828	}
 829	dev_kfree_skb(skb);
 830
 831	stop_t200(st, 6);
 832	lapb_dl_release_l2l3(st, CONFIRM);
 833	FsmChangeState(fi, ST_L2_4);
 834}
 835
 836static void
 837l2_reestablish(struct FsmInst *fi, int event, void *arg)
 838{
 839	struct PStack *st = fi->userdata;
 840	struct sk_buff *skb = arg;
 841
 842	if (!get_PollFlagFree(st, skb)) {
 843		establishlink(fi);
 844		test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
 845	}
 846}
 847
 848static void
 849l2_st5_dm_release(struct FsmInst *fi, int event, void *arg)
 850{
 851	struct PStack *st = fi->userdata;
 852	struct sk_buff *skb = arg;
 853
 854	if (get_PollFlagFree(st, skb)) {
 855		stop_t200(st, 7);
 856		if (!test_bit(FLG_L3_INIT, &st->l2.flag))
 857			skb_queue_purge(&st->l2.i_queue);
 858		if (test_bit(FLG_LAPB, &st->l2.flag))
 859			st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
 860		st5_dl_release_l2l3(st);
 861		FsmChangeState(fi, ST_L2_4);
 862	}
 863}
 864
 865static void
 866l2_st6_dm_release(struct FsmInst *fi, int event, void *arg)
 867{
 868	struct PStack *st = fi->userdata;
 869	struct sk_buff *skb = arg;
 870
 871	if (get_PollFlagFree(st, skb)) {
 872		stop_t200(st, 8);
 873		lapb_dl_release_l2l3(st, CONFIRM);
 874		FsmChangeState(fi, ST_L2_4);
 875	}
 876}
 877
 878static inline void
 879enquiry_cr(struct PStack *st, u_char typ, u_char cr, u_char pf)
 880{
 881	struct sk_buff *skb;
 882	struct Layer2 *l2;
 883	u_char tmp[MAX_HEADER_LEN];
 884	int i;
 885
 886	l2 = &st->l2;
 887	i = sethdraddr(l2, tmp, cr);
 888	if (test_bit(FLG_MOD128, &l2->flag)) {
 889		tmp[i++] = typ;
 890		tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0);
 891	} else
 892		tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0);
 893	if (!(skb = alloc_skb(i, GFP_ATOMIC))) {
 894		printk(KERN_WARNING "isdl2 can't alloc sbbuff for enquiry_cr\n");
 895		return;
 896	}
 897	memcpy(skb_put(skb, i), tmp, i);
 898	enqueue_super(st, skb);
 899}
 900
 901static inline void
 902enquiry_response(struct PStack *st)
 903{
 904	if (test_bit(FLG_OWN_BUSY, &st->l2.flag))
 905		enquiry_cr(st, RNR, RSP, 1);
 906	else
 907		enquiry_cr(st, RR, RSP, 1);
 908	test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
 909}
 910
 911static inline void
 912transmit_enquiry(struct PStack *st)
 913{
 914	if (test_bit(FLG_OWN_BUSY, &st->l2.flag))
 915		enquiry_cr(st, RNR, CMD, 1);
 916	else
 917		enquiry_cr(st, RR, CMD, 1);
 918	test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
 919	start_t200(st, 9);
 920}
 921
 922
 923static void
 924nrerrorrecovery(struct FsmInst *fi)
 925{
 926	struct PStack *st = fi->userdata;
 927
 928	st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'J');
 929	establishlink(fi);
 930	test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
 931}
 932
 933static void
 934invoke_retransmission(struct PStack *st, unsigned int nr)
 935{
 936	struct Layer2 *l2 = &st->l2;
 937	u_int p1;
 938	u_long flags;
 939
 940	spin_lock_irqsave(&l2->lock, flags);
 941	if (l2->vs != nr) {
 942		while (l2->vs != nr) {
 943			(l2->vs)--;
 944			if (test_bit(FLG_MOD128, &l2->flag)) {
 945				l2->vs %= 128;
 946				p1 = (l2->vs - l2->va) % 128;
 947			} else {
 948				l2->vs %= 8;
 949				p1 = (l2->vs - l2->va) % 8;
 950			}
 951			p1 = (p1 + l2->sow) % l2->window;
 952			if (test_bit(FLG_LAPB, &l2->flag))
 953				st->l1.bcs->tx_cnt += l2->windowar[p1]->len + l2headersize(l2, 0);
 954			skb_queue_head(&l2->i_queue, l2->windowar[p1]);
 955			l2->windowar[p1] = NULL;
 956		}
 957		spin_unlock_irqrestore(&l2->lock, flags);
 958		st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
 959		return;
 960	}
 961	spin_unlock_irqrestore(&l2->lock, flags);
 962}
 963
 964static void
 965l2_st7_got_super(struct FsmInst *fi, int event, void *arg)
 966{
 967	struct PStack *st = fi->userdata;
 968	struct sk_buff *skb = arg;
 969	int PollFlag, rsp, typ = RR;
 970	unsigned int nr;
 971	struct Layer2 *l2 = &st->l2;
 972
 973	rsp = *skb->data & 0x2;
 974	if (test_bit(FLG_ORIG, &l2->flag))
 975		rsp = !rsp;
 976
 977	skb_pull(skb, l2addrsize(l2));
 978	if (IsRNR(skb->data, st)) {
 979		set_peer_busy(l2);
 980		typ = RNR;
 981	} else
 982		clear_peer_busy(l2);
 983	if (IsREJ(skb->data, st))
 984		typ = REJ;
 985
 986	if (test_bit(FLG_MOD128, &l2->flag)) {
 987		PollFlag = (skb->data[1] & 0x1) == 0x1;
 988		nr = skb->data[1] >> 1;
 989	} else {
 990		PollFlag = (skb->data[0] & 0x10);
 991		nr = (skb->data[0] >> 5) & 0x7;
 992	}
 993	dev_kfree_skb(skb);
 994
 995	if (PollFlag) {
 996		if (rsp)
 997			st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'A');
 998		else
 999			enquiry_response(st);
1000	}
1001	if (legalnr(st, nr)) {
1002		if (typ == REJ) {
1003			setva(st, nr);
1004			invoke_retransmission(st, nr);
1005			stop_t200(st, 10);
1006			if (FsmAddTimer(&st->l2.t203, st->l2.T203,
1007					EV_L2_T203, NULL, 6))
1008				l2m_debug(&st->l2.l2m, "Restart T203 ST7 REJ");
1009		} else if ((nr == l2->vs) && (typ == RR)) {
1010			setva(st, nr);
1011			stop_t200(st, 11);
1012			FsmRestartTimer(&st->l2.t203, st->l2.T203,
1013					EV_L2_T203, NULL, 7);
1014		} else if ((l2->va != nr) || (typ == RNR)) {
1015			setva(st, nr);
1016			if (typ != RR) FsmDelTimer(&st->l2.t203, 9);
1017			restart_t200(st, 12);
1018		}
1019		if (!skb_queue_empty(&st->l2.i_queue) && (typ == RR))
1020			st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1021	} else
1022		nrerrorrecovery(fi);
1023}
1024
1025static void
1026l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg)
1027{
1028	struct PStack *st = fi->userdata;
1029	struct sk_buff *skb = arg;
1030
1031	if (test_bit(FLG_LAPB, &st->l2.flag))
1032		st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
1033	if (!test_bit(FLG_L3_INIT, &st->l2.flag))
1034		skb_queue_tail(&st->l2.i_queue, skb);
1035	else
1036		dev_kfree_skb(skb);
1037}
1038
1039static void
1040l2_feed_i_pull(struct FsmInst *fi, int event, void *arg)
1041{
1042	struct PStack *st = fi->userdata;
1043	struct sk_buff *skb = arg;
1044
1045	if (test_bit(FLG_LAPB, &st->l2.flag))
1046		st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
1047	skb_queue_tail(&st->l2.i_queue, skb);
1048	st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1049}
1050
1051static void
1052l2_feed_iqueue(struct FsmInst *fi, int event, void *arg)
1053{
1054	struct PStack *st = fi->userdata;
1055	struct sk_buff *skb = arg;
1056
1057	if (test_bit(FLG_LAPB, &st->l2.flag))
1058		st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
1059	skb_queue_tail(&st->l2.i_queue, skb);
1060}
1061
1062static void
1063l2_got_iframe(struct FsmInst *fi, int event, void *arg)
1064{
1065	struct PStack *st = fi->userdata;
1066	struct sk_buff *skb = arg;
1067	struct Layer2 *l2 = &(st->l2);
1068	int PollFlag, ns, i;
1069	unsigned int nr;
1070
1071	i = l2addrsize(l2);
1072	if (test_bit(FLG_MOD128, &l2->flag)) {
1073		PollFlag = ((skb->data[i + 1] & 0x1) == 0x1);
1074		ns = skb->data[i] >> 1;
1075		nr = (skb->data[i + 1] >> 1) & 0x7f;
1076	} else {
1077		PollFlag = (skb->data[i] & 0x10);
1078		ns = (skb->data[i] >> 1) & 0x7;
1079		nr = (skb->data[i] >> 5) & 0x7;
1080	}
1081	if (test_bit(FLG_OWN_BUSY, &l2->flag)) {
1082		dev_kfree_skb(skb);
1083		if (PollFlag) enquiry_response(st);
1084	} else if (l2->vr == ns) {
1085		(l2->vr)++;
1086		if (test_bit(FLG_MOD128, &l2->flag))
1087			l2->vr %= 128;
1088		else
1089			l2->vr %= 8;
1090		test_and_clear_bit(FLG_REJEXC, &l2->flag);
1091
1092		if (PollFlag)
1093			enquiry_response(st);
1094		else
1095			test_and_set_bit(FLG_ACK_PEND, &l2->flag);
1096		skb_pull(skb, l2headersize(l2, 0));
1097		st->l2.l2l3(st, DL_DATA | INDICATION, skb);
1098	} else {
1099		/* n(s)!=v(r) */
1100		dev_kfree_skb(skb);
1101		if (test_and_set_bit(FLG_REJEXC, &l2->flag)) {
1102			if (PollFlag)
1103				enquiry_response(st);
1104		} else {
1105			enquiry_cr(st, REJ, RSP, PollFlag);
1106			test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
1107		}
1108	}
1109
1110	if (legalnr(st, nr)) {
1111		if (!test_bit(FLG_PEER_BUSY, &st->l2.flag) && (fi->state == ST_L2_7)) {
1112			if (nr == st->l2.vs) {
1113				stop_t200(st, 13);
1114				FsmRestartTimer(&st->l2.t203, st->l2.T203,
1115						EV_L2_T203, NULL, 7);
1116			} else if (nr != st->l2.va)
1117				restart_t200(st, 14);
1118		}
1119		setva(st, nr);
1120	} else {
1121		nrerrorrecovery(fi);
1122		return;
1123	}
1124
1125	if (!skb_queue_empty(&st->l2.i_queue) && (fi->state == ST_L2_7))
1126		st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1127	if (test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag))
1128		enquiry_cr(st, RR, RSP, 0);
1129}
1130
1131static void
1132l2_got_tei(struct FsmInst *fi, int event, void *arg)
1133{
1134	struct PStack *st = fi->userdata;
1135
1136	st->l2.tei = (long) arg;
1137
1138	if (fi->state == ST_L2_3) {
1139		establishlink(fi);
1140		test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
1141	} else
1142		FsmChangeState(fi, ST_L2_4);
1143	if (!skb_queue_empty(&st->l2.ui_queue))
1144		tx_ui(st);
1145}
1146
1147static void
1148l2_st5_tout_200(struct FsmInst *fi, int event, void *arg)
1149{
1150	struct PStack *st = fi->userdata;
1151
1152	if (test_bit(FLG_LAPD, &st->l2.flag) &&
1153	    test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1154		FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1155	} else if (st->l2.rc == st->l2.N200) {
1156		FsmChangeState(fi, ST_L2_4);
1157		test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
1158		skb_queue_purge(&st->l2.i_queue);
1159		st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'G');
1160		if (test_bit(FLG_LAPB, &st->l2.flag))
1161			st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
1162		st5_dl_release_l2l3(st);
1163	} else {
1164		st->l2.rc++;
1165		FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1166		send_uframe(st, (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM)
1167			    | 0x10, CMD);
1168	}
1169}
1170
1171static void
1172l2_st6_tout_200(struct FsmInst *fi, int event, void *arg)
1173{
1174	struct PStack *st = fi->userdata;
1175
1176	if (test_bit(FLG_LAPD, &st->l2.flag) &&
1177	    test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1178		FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1179	} else if (st->l2.rc == st->l2.N200) {
1180		FsmChangeState(fi, ST_L2_4);
1181		test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
1182		st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'H');
1183		lapb_dl_release_l2l3(st, CONFIRM);
1184	} else {
1185		st->l2.rc++;
1186		FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200,
1187			    NULL, 9);
1188		send_uframe(st, DISC | 0x10, CMD);
1189	}
1190}
1191
1192static void
1193l2_st7_tout_200(struct FsmInst *fi, int event, void *arg)
1194{
1195	struct PStack *st = fi->userdata;
1196
1197	if (test_bit(FLG_LAPD, &st->l2.flag) &&
1198	    test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1199		FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1200		return;
1201	}
1202	test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
1203	st->l2.rc = 0;
1204	FsmChangeState(fi, ST_L2_8);
1205
1206	transmit_enquiry(st);
1207	st->l2.rc++;
1208}
1209
1210static void
1211l2_st8_tout_200(struct FsmInst *fi, int event, void *arg)
1212{
1213	struct PStack *st = fi->userdata;
1214
1215	if (test_bit(FLG_LAPD, &st->l2.flag) &&
1216	    test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1217		FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1218		return;
1219	}
1220	test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
1221	if (st->l2.rc == st->l2.N200) {
1222		st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'I');
1223		establishlink(fi);
1224		test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
1225	} else {
1226		transmit_enquiry(st);
1227		st->l2.rc++;
1228	}
1229}
1230
1231static void
1232l2_st7_tout_203(struct FsmInst *fi, int event, void *arg)
1233{
1234	struct PStack *st = fi->userdata;
1235
1236	if (test_bit(FLG_LAPD, &st->l2.flag) &&
1237	    test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1238		FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 9);
1239		return;
1240	}
1241	FsmChangeState(fi, ST_L2_8);
1242	transmit_enquiry(st);
1243	st->l2.rc = 0;
1244}
1245
1246static void
1247l2_pull_iqueue(struct FsmInst *fi, int event, void *arg)
1248{
1249	struct PStack *st = fi->userdata;
1250	struct sk_buff *skb, *nskb;
1251	struct Layer2 *l2 = &st->l2;
1252	u_char header[MAX_HEADER_LEN];
1253	int i, hdr_space_needed;
1254	int unsigned p1;
1255	u_long flags;
1256
1257	if (!cansend(st))
1258		return;
1259
1260	skb = skb_dequeue(&l2->i_queue);
1261	if (!skb)
1262		return;
1263
1264	hdr_space_needed = l2headersize(l2, 0);
1265	nskb = skb_realloc_headroom(skb, hdr_space_needed);
1266	if (!nskb) {
1267		skb_queue_head(&l2->i_queue, skb);
1268		return;
1269	}
1270	spin_lock_irqsave(&l2->lock, flags);
1271	if (test_bit(FLG_MOD128, &l2->flag))
1272		p1 = (l2->vs - l2->va) % 128;
1273	else
1274		p1 = (l2->vs - l2->va) % 8;
1275	p1 = (p1 + l2->sow) % l2->window;
1276	if (l2->windowar[p1]) {
1277		printk(KERN_WARNING "isdnl2 try overwrite ack queue entry %d\n",
1278		       p1);
1279		dev_kfree_skb(l2->windowar[p1]);
1280	}
1281	l2->windowar[p1] = skb;
1282
1283	i = sethdraddr(&st->l2, header, CMD);
1284
1285	if (test_bit(FLG_MOD128, &l2->flag)) {
1286		header[i++] = l2->vs << 1;
1287		header[i++] = l2->vr << 1;
1288		l2->vs = (l2->vs + 1) % 128;
1289	} else {
1290		header[i++] = (l2->vr << 5) | (l2->vs << 1);
1291		l2->vs = (l2->vs + 1) % 8;
1292	}
1293	spin_unlock_irqrestore(&l2->lock, flags);
1294	memcpy(skb_push(nskb, i), header, i);
1295	st->l2.l2l1(st, PH_PULL | INDICATION, nskb);
1296	test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
1297	if (!test_and_set_bit(FLG_T200_RUN, &st->l2.flag)) {
1298		FsmDelTimer(&st->l2.t203, 13);
1299		FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 11);
1300	}
1301	if (!skb_queue_empty(&l2->i_queue) && cansend(st))
1302		st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1303}
1304
1305static void
1306l2_st8_got_super(struct FsmInst *fi, int event, void *arg)
1307{
1308	struct PStack *st = fi->userdata;
1309	struct sk_buff *skb = arg;
1310	int PollFlag, rsp, rnr = 0;
1311	unsigned int nr;
1312	struct Layer2 *l2 = &st->l2;
1313
1314	rsp = *skb->data & 0x2;
1315	if (test_bit(FLG_ORIG, &l2->flag))
1316		rsp = !rsp;
1317
1318	skb_pull(skb, l2addrsize(l2));
1319
1320	if (IsRNR(skb->data, st)) {
1321		set_peer_busy(l2);
1322		rnr = 1;
1323	} else
1324		clear_peer_busy(l2);
1325
1326	if (test_bit(FLG_MOD128, &l2->flag)) {
1327		PollFlag = (skb->data[1] & 0x1) == 0x1;
1328		nr = skb->data[1] >> 1;
1329	} else {
1330		PollFlag = (skb->data[0] & 0x10);
1331		nr = (skb->data[0] >> 5) & 0x7;
1332	}
1333	dev_kfree_skb(skb);
1334
1335	if (rsp && PollFlag) {
1336		if (legalnr(st, nr)) {
1337			if (rnr) {
1338				restart_t200(st, 15);
1339			} else {
1340				stop_t200(st, 16);
1341				FsmAddTimer(&l2->t203, l2->T203,
1342					    EV_L2_T203, NULL, 5);
1343				setva(st, nr);
1344			}
1345			invoke_retransmission(st, nr);
1346			FsmChangeState(fi, ST_L2_7);
1347			if (!skb_queue_empty(&l2->i_queue) && cansend(st))
1348				st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1349		} else
1350			nrerrorrecovery(fi);
1351	} else {
1352		if (!rsp && PollFlag)
1353			enquiry_response(st);
1354		if (legalnr(st, nr)) {
1355			setva(st, nr);
1356		} else
1357			nrerrorrecovery(fi);
1358	}
1359}
1360
1361static void
1362l2_got_FRMR(struct FsmInst *fi, int event, void *arg)
1363{
1364	struct PStack *st = fi->userdata;
1365	struct sk_buff *skb = arg;
1366
1367	skb_pull(skb, l2addrsize(&st->l2) + 1);
1368
1369	if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) ||		/* I or S */
1370	    (IsUA(skb->data) && (fi->state == ST_L2_7))) {
1371		st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'K');
1372		establishlink(fi);
1373		test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
1374	}
1375	dev_kfree_skb(skb);
1376}
1377
1378static void
1379l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg)
1380{
1381	struct PStack *st = fi->userdata;
1382
1383	skb_queue_purge(&st->l2.ui_queue);
1384	st->l2.tei = -1;
1385	FsmChangeState(fi, ST_L2_1);
1386}
1387
1388static void
1389l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg)
1390{
1391	struct PStack *st = fi->userdata;
1392
1393	skb_queue_purge(&st->l2.ui_queue);
1394	st->l2.tei = -1;
1395	st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
1396	FsmChangeState(fi, ST_L2_1);
1397}
1398
1399static void
1400l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg)
1401{
1402	struct PStack *st = fi->userdata;
1403
1404	skb_queue_purge(&st->l2.i_queue);
1405	skb_queue_purge(&st->l2.ui_queue);
1406	freewin(st);
1407	st->l2.tei = -1;
1408	stop_t200(st, 17);
1409	st5_dl_release_l2l3(st);
1410	FsmChangeState(fi, ST_L2_1);
1411}
1412
1413static void
1414l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg)
1415{
1416	struct PStack *st = fi->userdata;
1417
1418	skb_queue_purge(&st->l2.ui_queue);
1419	st->l2.tei = -1;
1420	stop_t200(st, 18);
1421	st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
1422	FsmChangeState(fi, ST_L2_1);
1423}
1424
1425static void
1426l2_tei_remove(struct FsmInst *fi, int event, void *arg)
1427{
1428	struct PStack *st = fi->userdata;
1429
1430	skb_queue_purge(&st->l2.i_queue);
1431	skb_queue_purge(&st->l2.ui_queue);
1432	freewin(st);
1433	st->l2.tei = -1;
1434	stop_t200(st, 17);
1435	FsmDelTimer(&st->l2.t203, 19);
1436	st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
1437	FsmChangeState(fi, ST_L2_1);
1438}
1439
1440static void
1441l2_st14_persistent_da(struct FsmInst *fi, int event, void *arg)
1442{
1443	struct PStack *st = fi->userdata;
1444
1445	skb_queue_purge(&st->l2.i_queue);
1446	skb_queue_purge(&st->l2.ui_queue);
1447	if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag))
1448		st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
1449}
1450
1451static void
1452l2_st5_persistent_da(struct FsmInst *fi, int event, void *arg)
1453{
1454	struct PStack *st = fi->userdata;
1455
1456	skb_queue_purge(&st->l2.i_queue);
1457	skb_queue_purge(&st->l2.ui_queue);
1458	freewin(st);
1459	stop_t200(st, 19);
1460	st5_dl_release_l2l3(st);
1461	FsmChangeState(fi, ST_L2_4);
1462}
1463
1464static void
1465l2_st6_persistent_da(struct FsmInst *fi, int event, void *arg)
1466{
1467	struct PStack *st = fi->userdata;
1468
1469	skb_queue_purge(&st->l2.ui_queue);
1470	stop_t200(st, 20);
1471	st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
1472	FsmChangeState(fi, ST_L2_4);
1473}
1474
1475static void
1476l2_persistent_da(struct FsmInst *fi, int event, void *arg)
1477{
1478	struct PStack *st = fi->userdata;
1479
1480	skb_queue_purge(&st->l2.i_queue);
1481	skb_queue_purge(&st->l2.ui_queue);
1482	freewin(st);
1483	stop_t200(st, 19);
1484	FsmDelTimer(&st->l2.t203, 19);
1485	st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
1486	FsmChangeState(fi, ST_L2_4);
1487}
1488
1489static void
1490l2_set_own_busy(struct FsmInst *fi, int event, void *arg)
1491{
1492	struct PStack *st = fi->userdata;
1493
1494	if (!test_and_set_bit(FLG_OWN_BUSY, &st->l2.flag)) {
1495		enquiry_cr(st, RNR, RSP, 0);
1496		test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
1497	}
1498}
1499
1500static void
1501l2_clear_own_busy(struct FsmInst *fi, int event, void *arg)
1502{
1503	struct PStack *st = fi->userdata;
1504
1505	if (!test_and_clear_bit(FLG_OWN_BUSY, &st->l2.flag)) {
1506		enquiry_cr(st, RR, RSP, 0);
1507		test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
1508	}
1509}
1510
1511static void
1512l2_frame_error(struct FsmInst *fi, int event, void *arg)
1513{
1514	struct PStack *st = fi->userdata;
1515
1516	st->ma.layer(st, MDL_ERROR | INDICATION, arg);
1517}
1518
1519static void
1520l2_frame_error_reest(struct FsmInst *fi, int event, void *arg)
1521{
1522	struct PStack *st = fi->userdata;
1523
1524	st->ma.layer(st, MDL_ERROR | INDICATION, arg);
1525	establishlink(fi);
1526	test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
1527}
1528
1529static struct FsmNode L2FnList[] __initdata =
1530{
1531	{ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign},
1532	{ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3},
1533	{ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish},
1534	{ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3},
1535	{ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish},
1536	{ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish},
1537	{ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release},
1538	{ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel},
1539	{ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect},
1540	{ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect},
1541	{ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest},
1542	{ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull},
1543	{ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue},
1544	{ST_L2_1, EV_L2_DL_UNIT_DATA, l2_queue_ui_assign},
1545	{ST_L2_2, EV_L2_DL_UNIT_DATA, l2_queue_ui},
1546	{ST_L2_3, EV_L2_DL_UNIT_DATA, l2_queue_ui},
1547	{ST_L2_4, EV_L2_DL_UNIT_DATA, l2_send_ui},
1548	{ST_L2_5, EV_L2_DL_UNIT_DATA, l2_send_ui},
1549	{ST_L2_6, EV_L2_DL_UNIT_DATA, l2_send_ui},
1550	{ST_L2_7, EV_L2_DL_UNIT_DATA, l2_send_ui},
1551	{ST_L2_8, EV_L2_DL_UNIT_DATA, l2_send_ui},
1552	{ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei},
1553	{ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei},
1554	{ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei},
1555	{ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove},
1556	{ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove},
1557	{ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove},
1558	{ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove},
1559	{ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove},
1560	{ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove},
1561	{ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove},
1562	{ST_L2_4, EV_L2_SABME, l2_start_multi},
1563	{ST_L2_5, EV_L2_SABME, l2_send_UA},
1564	{ST_L2_6, EV_L2_SABME, l2_send_DM},
1565	{ST_L2_7, EV_L2_SABME, l2_restart_multi},
1566	{ST_L2_8, EV_L2_SABME, l2_restart_multi},
1567	{ST_L2_4, EV_L2_DISC, l2_send_DM},
1568	{ST_L2_5, EV_L2_DISC, l2_send_DM},
1569	{ST_L2_6, EV_L2_DISC, l2_send_UA},
1570	{ST_L2_7, EV_L2_DISC, l2_stop_multi},
1571	{ST_L2_8, EV_L2_DISC, l2_stop_multi},
1572	{ST_L2_4, EV_L2_UA, l2_mdl_error_ua},
1573	{ST_L2_5, EV_L2_UA, l2_connected},
1574	{ST_L2_6, EV_L2_UA, l2_released},
1575	{ST_L2_7, EV_L2_UA, l2_mdl_error_ua},
1576	{ST_L2_8, EV_L2_UA, l2_mdl_error_ua},
1577	{ST_L2_4, EV_L2_DM, l2_reestablish},
1578	{ST_L2_5, EV_L2_DM, l2_st5_dm_release},
1579	{ST_L2_6, EV_L2_DM, l2_st6_dm_release},
1580	{ST_L2_7, EV_L2_DM, l2_mdl_error_dm},
1581	{ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm},
1582	{ST_L2_1, EV_L2_UI, l2_got_ui},
1583	{ST_L2_2, EV_L2_UI, l2_got_ui},
1584	{ST_L2_3, EV_L2_UI, l2_got_ui},
1585	{ST_L2_4, EV_L2_UI, l2_got_ui},
1586	{ST_L2_5, EV_L2_UI, l2_got_ui},
1587	{ST_L2_6, EV_L2_UI, l2_got_ui},
1588	{ST_L2_7, EV_L2_UI, l2_got_ui},
1589	{ST_L2_8, EV_L2_UI, l2_got_ui},
1590	{ST_L2_7, EV_L2_FRMR, l2_got_FRMR},
1591	{ST_L2_8, EV_L2_FRMR, l2_got_FRMR},
1592	{ST_L2_7, EV_L2_SUPER, l2_st7_got_super},
1593	{ST_L2_8, EV_L2_SUPER, l2_st8_got_super},
1594	{ST_L2_7, EV_L2_I, l2_got_iframe},
1595	{ST_L2_8, EV_L2_I, l2_got_iframe},
1596	{ST_L2_5, EV_L2_T200, l2_st5_tout_200},
1597	{ST_L2_6, EV_L2_T200, l2_st6_tout_200},
1598	{ST_L2_7, EV_L2_T200, l2_st7_tout_200},
1599	{ST_L2_8, EV_L2_T200, l2_st8_tout_200},
1600	{ST_L2_7, EV_L2_T203, l2_st7_tout_203},
1601	{ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue},
1602	{ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy},
1603	{ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy},
1604	{ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy},
1605	{ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy},
1606	{ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error},
1607	{ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error},
1608	{ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error},
1609	{ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest},
1610	{ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest},
1611	{ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistent_da},
1612	{ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove},
1613	{ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove},
1614	{ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistent_da},
1615	{ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistent_da},
1616	{ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistent_da},
1617	{ST_L2_7, EV_L1_DEACTIVATE, l2_persistent_da},
1618	{ST_L2_8, EV_L1_DEACTIVATE, l2_persistent_da},
1619};
1620
1621static void
1622isdnl2_l1l2(struct PStack *st, int pr, void *arg)
1623{
1624	struct sk_buff *skb = arg;
1625	u_char *datap;
1626	int ret = 1, len;
1627	int c = 0;
1628
1629	switch (pr) {
1630	case (PH_DATA | INDICATION):
1631		datap = skb->data;
1632		len = l2addrsize(&st->l2);
1633		if (skb->len > len)
1634			datap += len;
1635		else {
1636			FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'N');
1637			dev_kfree_skb(skb);
1638			return;
1639		}
1640		if (!(*datap & 1)) {	/* I-Frame */
1641			if (!(c = iframe_error(st, skb)))
1642				ret = FsmEvent(&st->l2.l2m, EV_L2_I, skb);
1643		} else if (IsSFrame(datap, st)) {	/* S-Frame */
1644			if (!(c = super_error(st, skb)))
1645				ret = FsmEvent(&st->l2.l2m, EV_L2_SUPER, skb);
1646		} else if (IsUI(datap)) {
1647			if (!(c = UI_error(st, skb)))
1648				ret = FsmEvent(&st->l2.l2m, EV_L2_UI, skb);
1649		} else if (IsSABME(datap, st)) {
1650			if (!(c = unnum_error(st, skb, CMD)))
1651				ret = FsmEvent(&st->l2.l2m, EV_L2_SABME, skb);
1652		} else if (IsUA(datap)) {
1653			if (!(c = unnum_error(st, skb, RSP)))
1654				ret = FsmEvent(&st->l2.l2m, EV_L2_UA, skb);
1655		} else if (IsDISC(datap)) {
1656			if (!(c = unnum_error(st, skb, CMD)))
1657				ret = FsmEvent(&st->l2.l2m, EV_L2_DISC, skb);
1658		} else if (IsDM(datap)) {
1659			if (!(c = unnum_error(st, skb, RSP)))
1660				ret = FsmEvent(&st->l2.l2m, EV_L2_DM, skb);
1661		} else if (IsFRMR(datap)) {
1662			if (!(c = FRMR_error(st, skb)))
1663				ret = FsmEvent(&st->l2.l2m, EV_L2_FRMR, skb);
1664		} else {
1665			FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'L');
1666			dev_kfree_skb(skb);
1667			ret = 0;
1668		}
1669		if (c) {
1670			dev_kfree_skb(skb);
1671			FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *)(long)c);
1672			ret = 0;
1673		}
1674		if (ret)
1675			dev_kfree_skb(skb);
1676		break;
1677	case (PH_PULL | CONFIRM):
1678		FsmEvent(&st->l2.l2m, EV_L2_ACK_PULL, arg);
1679		break;
1680	case (PH_PAUSE | INDICATION):
1681		test_and_set_bit(FLG_DCHAN_BUSY, &st->l2.flag);
1682		break;
1683	case (PH_PAUSE | CONFIRM):
1684		test_and_clear_bit(FLG_DCHAN_BUSY, &st->l2.flag);
1685		break;
1686	case (PH_ACTIVATE | CONFIRM):
1687	case (PH_ACTIVATE | INDICATION):
1688		test_and_set_bit(FLG_L1_ACTIV, &st->l2.flag);
1689		if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag))
1690			FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg);
1691		break;
1692	case (PH_DEACTIVATE | INDICATION):
1693	case (PH_DEACTIVATE | CONFIRM):
1694		test_and_clear_bit(FLG_L1_ACTIV, &st->l2.flag);
1695		FsmEvent(&st->l2.l2m, EV_L1_DEACTIVATE, arg);
1696		break;
1697	default:
1698		l2m_debug(&st->l2.l2m, "l2 unknown pr %04x", pr);
1699		break;
1700	}
1701}
1702
1703static void
1704isdnl2_l3l2(struct PStack *st, int pr, void *arg)
1705{
1706	switch (pr) {
1707	case (DL_DATA | REQUEST):
1708		if (FsmEvent(&st->l2.l2m, EV_L2_DL_DATA, arg)) {
1709			dev_kfree_skb((struct sk_buff *) arg);
1710		}
1711		break;
1712	case (DL_UNIT_DATA | REQUEST):
1713		if (FsmEvent(&st->l2.l2m, EV_L2_DL_UNIT_DATA, arg)) {
1714			dev_kfree_skb((struct sk_buff *) arg);
1715		}
1716		break;
1717	case (DL_ESTABLISH | REQUEST):
1718		if (test_bit(FLG_L1_ACTIV, &st->l2.flag)) {
1719			if (test_bit(FLG_LAPD, &st->l2.flag) ||
1720			    test_bit(FLG_ORIG, &st->l2.flag)) {
1721				FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg);
1722			}
1723		} else {
1724			if (test_bit(FLG_LAPD, &st->l2.flag) ||
1725			    test_bit(FLG_ORIG, &st->l2.flag)) {
1726				test_and_set_bit(FLG_ESTAB_PEND, &st->l2.flag);
1727			}
1728			st->l2.l2l1(st, PH_ACTIVATE, NULL);
1729		}
1730		break;
1731	case (DL_RELEASE | REQUEST):
1732		if (test_bit(FLG_LAPB, &st->l2.flag)) {
1733			st->l2.l2l1(st, PH_DEACTIVATE, NULL);
1734		}
1735		FsmEvent(&st->l2.l2m, EV_L2_DL_RELEASE_REQ, arg);
1736		break;
1737	case (MDL_ASSIGN | REQUEST):
1738		FsmEvent(&st->l2.l2m, EV_L2_MDL_ASSIGN, arg);
1739		break;
1740	case (MDL_REMOVE | REQUEST):
1741		FsmEvent(&st->l2.l2m, EV_L2_MDL_REMOVE, arg);
1742		break;
1743	case (MDL_ERROR | RESPONSE):
1744		FsmEvent(&st->l2.l2m, EV_L2_MDL_ERROR, arg);
1745		break;
1746	}
1747}
1748
1749void
1750releasestack_isdnl2(struct PStack *st)
1751{
1752	FsmDelTimer(&st->l2.t200, 21);
1753	FsmDelTimer(&st->l2.t203, 16);
1754	skb_queue_purge(&st->l2.i_queue);
1755	skb_queue_purge(&st->l2.ui_queue);
1756	ReleaseWin(&st->l2);
1757}
1758
1759static void
1760l2m_debug(struct FsmInst *fi, char *fmt, ...)
1761{
1762	va_list args;
1763	struct PStack *st = fi->userdata;
1764
1765	va_start(args, fmt);
1766	VHiSax_putstatus(st->l1.hardware, st->l2.debug_id, fmt, args);
1767	va_end(args);
1768}
1769
1770void
1771setstack_isdnl2(struct PStack *st, char *debug_id)
1772{
1773	spin_lock_init(&st->l2.lock);
1774	st->l1.l1l2 = isdnl2_l1l2;
1775	st->l3.l3l2 = isdnl2_l3l2;
1776
1777	skb_queue_head_init(&st->l2.i_queue);
1778	skb_queue_head_init(&st->l2.ui_queue);
1779	InitWin(&st->l2);
1780	st->l2.debug = 0;
1781
1782	st->l2.l2m.fsm = &l2fsm;
1783	if (test_bit(FLG_LAPB, &st->l2.flag))
1784		st->l2.l2m.state = ST_L2_4;
1785	else
1786		st->l2.l2m.state = ST_L2_1;
1787	st->l2.l2m.debug = 0;
1788	st->l2.l2m.userdata = st;
1789	st->l2.l2m.userint = 0;
1790	st->l2.l2m.printdebug = l2m_debug;
1791	strcpy(st->l2.debug_id, debug_id);
1792
1793	FsmInitTimer(&st->l2.l2m, &st->l2.t200);
1794	FsmInitTimer(&st->l2.l2m, &st->l2.t203);
1795}
1796
1797static void
1798transl2_l3l2(struct PStack *st, int pr, void *arg)
1799{
1800	switch (pr) {
1801	case (DL_DATA | REQUEST):
1802	case (DL_UNIT_DATA | REQUEST):
1803		st->l2.l2l1(st, PH_DATA | REQUEST, arg);
1804		break;
1805	case (DL_ESTABLISH | REQUEST):
1806		st->l2.l2l1(st, PH_ACTIVATE | REQUEST, NULL);
1807		break;
1808	case (DL_RELEASE | REQUEST):
1809		st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
1810		break;
1811	}
1812}
1813
1814void
1815setstack_transl2(struct PStack *st)
1816{
1817	st->l3.l3l2 = transl2_l3l2;
1818}
1819
1820void
1821releasestack_transl2(struct PStack *st)
1822{
1823}
1824
1825int __init
1826Isdnl2New(void)
1827{
1828	l2fsm.state_count = L2_STATE_COUNT;
1829	l2fsm.event_count = L2_EVENT_COUNT;
1830	l2fsm.strEvent = strL2Event;
1831	l2fsm.strState = strL2State;
1832	return FsmNew(&l2fsm, L2FnList, ARRAY_SIZE(L2FnList));
1833}
1834
1835void
1836Isdnl2Free(void)
1837{
1838	FsmFree(&l2fsm);
1839}