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1da177e4 LT |
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 "hisax.h" | |
20 | #include "isdnl2.h" | |
21 | ||
22 | const char *l2_revision = "$Revision: 2.30.2.4 $"; | |
23 | ||
24 | static void l2m_debug(struct FsmInst *fi, char *fmt, ...); | |
25 | ||
26 | static struct Fsm l2fsm; | |
27 | ||
28 | enum { | |
29 | ST_L2_1, | |
30 | ST_L2_2, | |
31 | ST_L2_3, | |
32 | ST_L2_4, | |
33 | ST_L2_5, | |
34 | ST_L2_6, | |
35 | ST_L2_7, | |
36 | ST_L2_8, | |
37 | }; | |
38 | ||
39 | #define L2_STATE_COUNT (ST_L2_8+1) | |
40 | ||
41 | static char *strL2State[] = | |
42 | { | |
43 | "ST_L2_1", | |
44 | "ST_L2_2", | |
45 | "ST_L2_3", | |
46 | "ST_L2_4", | |
47 | "ST_L2_5", | |
48 | "ST_L2_6", | |
49 | "ST_L2_7", | |
50 | "ST_L2_8", | |
51 | }; | |
52 | ||
53 | enum { | |
54 | EV_L2_UI, | |
55 | EV_L2_SABME, | |
56 | EV_L2_DISC, | |
57 | EV_L2_DM, | |
58 | EV_L2_UA, | |
59 | EV_L2_FRMR, | |
60 | EV_L2_SUPER, | |
61 | EV_L2_I, | |
62 | EV_L2_DL_DATA, | |
63 | EV_L2_ACK_PULL, | |
64 | EV_L2_DL_UNIT_DATA, | |
65 | EV_L2_DL_ESTABLISH_REQ, | |
66 | EV_L2_DL_RELEASE_REQ, | |
67 | EV_L2_MDL_ASSIGN, | |
68 | EV_L2_MDL_REMOVE, | |
69 | EV_L2_MDL_ERROR, | |
70 | EV_L1_DEACTIVATE, | |
71 | EV_L2_T200, | |
72 | EV_L2_T203, | |
73 | EV_L2_SET_OWN_BUSY, | |
74 | EV_L2_CLEAR_OWN_BUSY, | |
75 | EV_L2_FRAME_ERROR, | |
76 | }; | |
77 | ||
78 | #define L2_EVENT_COUNT (EV_L2_FRAME_ERROR+1) | |
79 | ||
80 | static char *strL2Event[] = | |
81 | { | |
82 | "EV_L2_UI", | |
83 | "EV_L2_SABME", | |
84 | "EV_L2_DISC", | |
85 | "EV_L2_DM", | |
86 | "EV_L2_UA", | |
87 | "EV_L2_FRMR", | |
88 | "EV_L2_SUPER", | |
89 | "EV_L2_I", | |
90 | "EV_L2_DL_DATA", | |
91 | "EV_L2_ACK_PULL", | |
92 | "EV_L2_DL_UNIT_DATA", | |
93 | "EV_L2_DL_ESTABLISH_REQ", | |
94 | "EV_L2_DL_RELEASE_REQ", | |
95 | "EV_L2_MDL_ASSIGN", | |
96 | "EV_L2_MDL_REMOVE", | |
97 | "EV_L2_MDL_ERROR", | |
98 | "EV_L1_DEACTIVATE", | |
99 | "EV_L2_T200", | |
100 | "EV_L2_T203", | |
101 | "EV_L2_SET_OWN_BUSY", | |
102 | "EV_L2_CLEAR_OWN_BUSY", | |
103 | "EV_L2_FRAME_ERROR", | |
104 | }; | |
105 | ||
106 | static int l2addrsize(struct Layer2 *l2); | |
107 | ||
108 | static void | |
109 | set_peer_busy(struct Layer2 *l2) { | |
110 | test_and_set_bit(FLG_PEER_BUSY, &l2->flag); | |
b03efcfb DM |
111 | if (!skb_queue_empty(&l2->i_queue) || |
112 | !skb_queue_empty(&l2->ui_queue)) | |
1da177e4 LT |
113 | test_and_set_bit(FLG_L2BLOCK, &l2->flag); |
114 | } | |
115 | ||
116 | static void | |
117 | clear_peer_busy(struct Layer2 *l2) { | |
118 | if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag)) | |
119 | test_and_clear_bit(FLG_L2BLOCK, &l2->flag); | |
120 | } | |
121 | ||
122 | static void | |
123 | InitWin(struct Layer2 *l2) | |
124 | { | |
125 | int i; | |
126 | ||
127 | for (i = 0; i < MAX_WINDOW; i++) | |
128 | l2->windowar[i] = NULL; | |
129 | } | |
130 | ||
131 | static int | |
132 | freewin1(struct Layer2 *l2) | |
133 | { | |
134 | int i, cnt = 0; | |
135 | ||
136 | for (i = 0; i < MAX_WINDOW; i++) { | |
137 | if (l2->windowar[i]) { | |
138 | cnt++; | |
139 | dev_kfree_skb(l2->windowar[i]); | |
140 | l2->windowar[i] = NULL; | |
141 | } | |
142 | } | |
143 | return cnt; | |
144 | } | |
145 | ||
672c3fd9 | 146 | static inline void |
1da177e4 LT |
147 | freewin(struct PStack *st) |
148 | { | |
149 | freewin1(&st->l2); | |
150 | } | |
151 | ||
152 | static void | |
153 | ReleaseWin(struct Layer2 *l2) | |
154 | { | |
155 | int cnt; | |
156 | ||
157 | if((cnt = freewin1(l2))) | |
158 | printk(KERN_WARNING "isdl2 freed %d skbuffs in release\n", cnt); | |
159 | } | |
160 | ||
672c3fd9 | 161 | static inline unsigned int |
1da177e4 LT |
162 | cansend(struct PStack *st) |
163 | { | |
164 | unsigned int p1; | |
165 | ||
166 | if(test_bit(FLG_MOD128, &st->l2.flag)) | |
167 | p1 = (st->l2.vs - st->l2.va) % 128; | |
168 | else | |
169 | p1 = (st->l2.vs - st->l2.va) % 8; | |
170 | return ((p1 < st->l2.window) && !test_bit(FLG_PEER_BUSY, &st->l2.flag)); | |
171 | } | |
172 | ||
672c3fd9 | 173 | static inline void |
1da177e4 LT |
174 | clear_exception(struct Layer2 *l2) |
175 | { | |
176 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
177 | test_and_clear_bit(FLG_REJEXC, &l2->flag); | |
178 | test_and_clear_bit(FLG_OWN_BUSY, &l2->flag); | |
179 | clear_peer_busy(l2); | |
180 | } | |
181 | ||
672c3fd9 | 182 | static inline int |
1da177e4 LT |
183 | l2headersize(struct Layer2 *l2, int ui) |
184 | { | |
185 | return (((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) + | |
186 | (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1)); | |
187 | } | |
188 | ||
189 | inline int | |
190 | l2addrsize(struct Layer2 *l2) | |
191 | { | |
192 | return (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1); | |
193 | } | |
194 | ||
195 | static int | |
196 | sethdraddr(struct Layer2 *l2, u_char * header, int rsp) | |
197 | { | |
198 | u_char *ptr = header; | |
199 | int crbit = rsp; | |
200 | ||
201 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
202 | *ptr++ = (l2->sap << 2) | (rsp ? 2 : 0); | |
203 | *ptr++ = (l2->tei << 1) | 1; | |
204 | return (2); | |
205 | } else { | |
206 | if (test_bit(FLG_ORIG, &l2->flag)) | |
207 | crbit = !crbit; | |
208 | if (crbit) | |
209 | *ptr++ = 1; | |
210 | else | |
211 | *ptr++ = 3; | |
212 | return (1); | |
213 | } | |
214 | } | |
215 | ||
77933d72 | 216 | static inline void |
1da177e4 LT |
217 | enqueue_super(struct PStack *st, |
218 | struct sk_buff *skb) | |
219 | { | |
220 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
221 | st->l1.bcs->tx_cnt += skb->len; | |
222 | st->l2.l2l1(st, PH_DATA | REQUEST, skb); | |
223 | } | |
224 | ||
225 | #define enqueue_ui(a, b) enqueue_super(a, b) | |
226 | ||
672c3fd9 | 227 | static inline int |
1da177e4 LT |
228 | IsUI(u_char * data) |
229 | { | |
230 | return ((data[0] & 0xef) == UI); | |
231 | } | |
232 | ||
672c3fd9 | 233 | static inline int |
1da177e4 LT |
234 | IsUA(u_char * data) |
235 | { | |
236 | return ((data[0] & 0xef) == UA); | |
237 | } | |
238 | ||
672c3fd9 | 239 | static inline int |
1da177e4 LT |
240 | IsDM(u_char * data) |
241 | { | |
242 | return ((data[0] & 0xef) == DM); | |
243 | } | |
244 | ||
672c3fd9 | 245 | static inline int |
1da177e4 LT |
246 | IsDISC(u_char * data) |
247 | { | |
248 | return ((data[0] & 0xef) == DISC); | |
249 | } | |
250 | ||
672c3fd9 | 251 | static inline int |
1da177e4 LT |
252 | IsSFrame(u_char * data, struct PStack *st) |
253 | { | |
254 | register u_char d = *data; | |
255 | ||
256 | if (!test_bit(FLG_MOD128, &st->l2.flag)) | |
257 | d &= 0xf; | |
258 | return(((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c)); | |
259 | } | |
260 | ||
672c3fd9 | 261 | static inline int |
1da177e4 LT |
262 | IsSABME(u_char * data, struct PStack *st) |
263 | { | |
264 | u_char d = data[0] & ~0x10; | |
265 | ||
266 | return (test_bit(FLG_MOD128, &st->l2.flag) ? d == SABME : d == SABM); | |
267 | } | |
268 | ||
672c3fd9 | 269 | static inline int |
1da177e4 LT |
270 | IsREJ(u_char * data, struct PStack *st) |
271 | { | |
272 | return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == REJ : (data[0] & 0xf) == REJ); | |
273 | } | |
274 | ||
672c3fd9 | 275 | static inline int |
1da177e4 LT |
276 | IsFRMR(u_char * data) |
277 | { | |
278 | return ((data[0] & 0xef) == FRMR); | |
279 | } | |
280 | ||
672c3fd9 | 281 | static inline int |
1da177e4 LT |
282 | IsRNR(u_char * data, struct PStack *st) |
283 | { | |
284 | return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == RNR : (data[0] & 0xf) == RNR); | |
285 | } | |
286 | ||
672c3fd9 | 287 | static int |
1da177e4 LT |
288 | iframe_error(struct PStack *st, struct sk_buff *skb) |
289 | { | |
290 | int i = l2addrsize(&st->l2) + (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1); | |
291 | int rsp = *skb->data & 0x2; | |
292 | ||
293 | if (test_bit(FLG_ORIG, &st->l2.flag)) | |
294 | rsp = !rsp; | |
295 | ||
296 | if (rsp) | |
297 | return 'L'; | |
298 | ||
299 | ||
300 | if (skb->len < i) | |
301 | return 'N'; | |
302 | ||
303 | if ((skb->len - i) > st->l2.maxlen) | |
304 | return 'O'; | |
305 | ||
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
672c3fd9 | 310 | static int |
1da177e4 LT |
311 | super_error(struct PStack *st, struct sk_buff *skb) |
312 | { | |
313 | if (skb->len != l2addrsize(&st->l2) + | |
314 | (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1)) | |
315 | return 'N'; | |
316 | ||
317 | return 0; | |
318 | } | |
319 | ||
672c3fd9 | 320 | static int |
1da177e4 LT |
321 | unnum_error(struct PStack *st, struct sk_buff *skb, int wantrsp) |
322 | { | |
323 | int rsp = (*skb->data & 0x2) >> 1; | |
324 | if (test_bit(FLG_ORIG, &st->l2.flag)) | |
325 | rsp = !rsp; | |
326 | ||
327 | if (rsp != wantrsp) | |
328 | return 'L'; | |
329 | ||
330 | if (skb->len != l2addrsize(&st->l2) + 1) | |
331 | return 'N'; | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
672c3fd9 | 336 | static int |
1da177e4 LT |
337 | UI_error(struct PStack *st, struct sk_buff *skb) |
338 | { | |
339 | int rsp = *skb->data & 0x2; | |
340 | if (test_bit(FLG_ORIG, &st->l2.flag)) | |
341 | rsp = !rsp; | |
342 | ||
343 | if (rsp) | |
344 | return 'L'; | |
345 | ||
346 | if (skb->len > st->l2.maxlen + l2addrsize(&st->l2) + 1) | |
347 | return 'O'; | |
348 | ||
349 | return 0; | |
350 | } | |
351 | ||
672c3fd9 | 352 | static int |
1da177e4 LT |
353 | FRMR_error(struct PStack *st, struct sk_buff *skb) |
354 | { | |
355 | int headers = l2addrsize(&st->l2) + 1; | |
356 | u_char *datap = skb->data + headers; | |
357 | int rsp = *skb->data & 0x2; | |
358 | ||
359 | if (test_bit(FLG_ORIG, &st->l2.flag)) | |
360 | rsp = !rsp; | |
361 | ||
362 | if (!rsp) | |
363 | return 'L'; | |
364 | ||
365 | if (test_bit(FLG_MOD128, &st->l2.flag)) { | |
366 | if (skb->len < headers + 5) | |
367 | return 'N'; | |
368 | else | |
369 | l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x %2x %2x", | |
370 | datap[0], datap[1], datap[2], | |
371 | datap[3], datap[4]); | |
372 | } else { | |
373 | if (skb->len < headers + 3) | |
374 | return 'N'; | |
375 | else | |
376 | l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x", | |
377 | datap[0], datap[1], datap[2]); | |
378 | } | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
383 | static unsigned int | |
384 | legalnr(struct PStack *st, unsigned int nr) | |
385 | { | |
386 | struct Layer2 *l2 = &st->l2; | |
387 | ||
388 | if(test_bit(FLG_MOD128, &l2->flag)) | |
389 | return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128); | |
390 | else | |
391 | return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8); | |
392 | } | |
393 | ||
394 | static void | |
395 | setva(struct PStack *st, unsigned int nr) | |
396 | { | |
397 | struct Layer2 *l2 = &st->l2; | |
398 | int len; | |
399 | u_long flags; | |
400 | ||
401 | spin_lock_irqsave(&l2->lock, flags); | |
402 | while (l2->va != nr) { | |
403 | (l2->va)++; | |
404 | if(test_bit(FLG_MOD128, &l2->flag)) | |
405 | l2->va %= 128; | |
406 | else | |
407 | l2->va %= 8; | |
408 | len = l2->windowar[l2->sow]->len; | |
409 | if (PACKET_NOACK == l2->windowar[l2->sow]->pkt_type) | |
410 | len = -1; | |
411 | dev_kfree_skb(l2->windowar[l2->sow]); | |
412 | l2->windowar[l2->sow] = NULL; | |
413 | l2->sow = (l2->sow + 1) % l2->window; | |
414 | spin_unlock_irqrestore(&l2->lock, flags); | |
415 | if (test_bit(FLG_LLI_L2WAKEUP, &st->lli.flag) && (len >=0)) | |
416 | lli_writewakeup(st, len); | |
417 | spin_lock_irqsave(&l2->lock, flags); | |
418 | } | |
419 | spin_unlock_irqrestore(&l2->lock, flags); | |
420 | } | |
421 | ||
422 | static void | |
423 | send_uframe(struct PStack *st, u_char cmd, u_char cr) | |
424 | { | |
425 | struct sk_buff *skb; | |
426 | u_char tmp[MAX_HEADER_LEN]; | |
427 | int i; | |
428 | ||
429 | i = sethdraddr(&st->l2, tmp, cr); | |
430 | tmp[i++] = cmd; | |
431 | if (!(skb = alloc_skb(i, GFP_ATOMIC))) { | |
432 | printk(KERN_WARNING "isdl2 can't alloc sbbuff for send_uframe\n"); | |
433 | return; | |
434 | } | |
435 | memcpy(skb_put(skb, i), tmp, i); | |
436 | enqueue_super(st, skb); | |
437 | } | |
438 | ||
672c3fd9 | 439 | static inline u_char |
1da177e4 LT |
440 | get_PollFlag(struct PStack * st, struct sk_buff * skb) |
441 | { | |
442 | return (skb->data[l2addrsize(&(st->l2))] & 0x10); | |
443 | } | |
444 | ||
672c3fd9 | 445 | static inline u_char |
1da177e4 LT |
446 | get_PollFlagFree(struct PStack *st, struct sk_buff *skb) |
447 | { | |
448 | u_char PF; | |
449 | ||
450 | PF = get_PollFlag(st, skb); | |
672c3fd9 | 451 | dev_kfree_skb(skb); |
1da177e4 LT |
452 | return (PF); |
453 | } | |
454 | ||
672c3fd9 | 455 | static inline void |
1da177e4 LT |
456 | start_t200(struct PStack *st, int i) |
457 | { | |
458 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i); | |
459 | test_and_set_bit(FLG_T200_RUN, &st->l2.flag); | |
460 | } | |
461 | ||
672c3fd9 | 462 | static inline void |
1da177e4 LT |
463 | restart_t200(struct PStack *st, int i) |
464 | { | |
465 | FsmRestartTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i); | |
466 | test_and_set_bit(FLG_T200_RUN, &st->l2.flag); | |
467 | } | |
468 | ||
672c3fd9 | 469 | static inline void |
1da177e4 LT |
470 | stop_t200(struct PStack *st, int i) |
471 | { | |
472 | if(test_and_clear_bit(FLG_T200_RUN, &st->l2.flag)) | |
473 | FsmDelTimer(&st->l2.t200, i); | |
474 | } | |
475 | ||
672c3fd9 | 476 | static inline void |
1da177e4 LT |
477 | st5_dl_release_l2l3(struct PStack *st) |
478 | { | |
479 | int pr; | |
480 | ||
481 | if(test_and_clear_bit(FLG_PEND_REL, &st->l2.flag)) | |
482 | pr = DL_RELEASE | CONFIRM; | |
483 | else | |
484 | pr = DL_RELEASE | INDICATION; | |
485 | ||
486 | st->l2.l2l3(st, pr, NULL); | |
487 | } | |
488 | ||
672c3fd9 | 489 | static inline void |
1da177e4 LT |
490 | lapb_dl_release_l2l3(struct PStack *st, int f) |
491 | { | |
492 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
493 | st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL); | |
494 | st->l2.l2l3(st, DL_RELEASE | f, NULL); | |
495 | } | |
496 | ||
497 | static void | |
498 | establishlink(struct FsmInst *fi) | |
499 | { | |
500 | struct PStack *st = fi->userdata; | |
501 | u_char cmd; | |
502 | ||
503 | clear_exception(&st->l2); | |
504 | st->l2.rc = 0; | |
505 | cmd = (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM) | 0x10; | |
506 | send_uframe(st, cmd, CMD); | |
507 | FsmDelTimer(&st->l2.t203, 1); | |
508 | restart_t200(st, 1); | |
509 | test_and_clear_bit(FLG_PEND_REL, &st->l2.flag); | |
510 | freewin(st); | |
511 | FsmChangeState(fi, ST_L2_5); | |
512 | } | |
513 | ||
514 | static void | |
515 | l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg) | |
516 | { | |
517 | struct sk_buff *skb = arg; | |
518 | struct PStack *st = fi->userdata; | |
519 | ||
520 | if (get_PollFlagFree(st, skb)) | |
521 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'C'); | |
522 | else | |
523 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'D'); | |
524 | } | |
525 | ||
526 | static void | |
527 | l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg) | |
528 | { | |
529 | struct sk_buff *skb = arg; | |
530 | struct PStack *st = fi->userdata; | |
531 | ||
532 | if (get_PollFlagFree(st, skb)) | |
533 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B'); | |
534 | else { | |
535 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E'); | |
536 | establishlink(fi); | |
537 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); | |
538 | } | |
539 | } | |
540 | ||
541 | static void | |
542 | l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg) | |
543 | { | |
544 | struct sk_buff *skb = arg; | |
545 | struct PStack *st = fi->userdata; | |
546 | ||
547 | if (get_PollFlagFree(st, skb)) | |
548 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B'); | |
549 | else { | |
550 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E'); | |
551 | } | |
552 | establishlink(fi); | |
553 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); | |
554 | } | |
555 | ||
556 | static void | |
557 | l2_go_st3(struct FsmInst *fi, int event, void *arg) | |
558 | { | |
559 | FsmChangeState(fi, ST_L2_3); | |
560 | } | |
561 | ||
562 | static void | |
563 | l2_mdl_assign(struct FsmInst *fi, int event, void *arg) | |
564 | { | |
565 | struct PStack *st = fi->userdata; | |
566 | ||
567 | FsmChangeState(fi, ST_L2_3); | |
568 | st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL); | |
569 | } | |
570 | ||
571 | static void | |
572 | l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg) | |
573 | { | |
574 | struct PStack *st = fi->userdata; | |
575 | struct sk_buff *skb = arg; | |
576 | ||
577 | skb_queue_tail(&st->l2.ui_queue, skb); | |
578 | FsmChangeState(fi, ST_L2_2); | |
579 | st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL); | |
580 | } | |
581 | ||
582 | static void | |
583 | l2_queue_ui(struct FsmInst *fi, int event, void *arg) | |
584 | { | |
585 | struct PStack *st = fi->userdata; | |
586 | struct sk_buff *skb = arg; | |
587 | ||
588 | skb_queue_tail(&st->l2.ui_queue, skb); | |
589 | } | |
590 | ||
591 | static void | |
592 | tx_ui(struct PStack *st) | |
593 | { | |
594 | struct sk_buff *skb; | |
595 | u_char header[MAX_HEADER_LEN]; | |
596 | int i; | |
597 | ||
598 | i = sethdraddr(&(st->l2), header, CMD); | |
599 | header[i++] = UI; | |
600 | while ((skb = skb_dequeue(&st->l2.ui_queue))) { | |
601 | memcpy(skb_push(skb, i), header, i); | |
602 | enqueue_ui(st, skb); | |
603 | } | |
604 | } | |
605 | ||
606 | static void | |
607 | l2_send_ui(struct FsmInst *fi, int event, void *arg) | |
608 | { | |
609 | struct PStack *st = fi->userdata; | |
610 | struct sk_buff *skb = arg; | |
611 | ||
612 | skb_queue_tail(&st->l2.ui_queue, skb); | |
613 | tx_ui(st); | |
614 | } | |
615 | ||
616 | static void | |
617 | l2_got_ui(struct FsmInst *fi, int event, void *arg) | |
618 | { | |
619 | struct PStack *st = fi->userdata; | |
620 | struct sk_buff *skb = arg; | |
621 | ||
622 | skb_pull(skb, l2headersize(&st->l2, 1)); | |
623 | st->l2.l2l3(st, DL_UNIT_DATA | INDICATION, skb); | |
624 | /* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
625 | * in states 1-3 for broadcast | |
626 | */ | |
627 | ||
628 | ||
629 | } | |
630 | ||
631 | static void | |
632 | l2_establish(struct FsmInst *fi, int event, void *arg) | |
633 | { | |
634 | struct PStack *st = fi->userdata; | |
635 | ||
636 | establishlink(fi); | |
637 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); | |
638 | } | |
639 | ||
640 | static void | |
641 | l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg) | |
642 | { | |
643 | struct PStack *st = fi->userdata; | |
644 | ||
645 | skb_queue_purge(&st->l2.i_queue); | |
646 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); | |
647 | test_and_clear_bit(FLG_PEND_REL, &st->l2.flag); | |
648 | } | |
649 | ||
650 | static void | |
651 | l2_l3_reestablish(struct FsmInst *fi, int event, void *arg) | |
652 | { | |
653 | struct PStack *st = fi->userdata; | |
654 | ||
655 | skb_queue_purge(&st->l2.i_queue); | |
656 | establishlink(fi); | |
657 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); | |
658 | } | |
659 | ||
660 | static void | |
661 | l2_release(struct FsmInst *fi, int event, void *arg) | |
662 | { | |
663 | struct PStack *st = fi->userdata; | |
664 | ||
665 | st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL); | |
666 | } | |
667 | ||
668 | static void | |
669 | l2_pend_rel(struct FsmInst *fi, int event, void *arg) | |
670 | { | |
671 | struct PStack *st = fi->userdata; | |
672 | ||
673 | test_and_set_bit(FLG_PEND_REL, &st->l2.flag); | |
674 | } | |
675 | ||
676 | static void | |
677 | l2_disconnect(struct FsmInst *fi, int event, void *arg) | |
678 | { | |
679 | struct PStack *st = fi->userdata; | |
680 | ||
681 | skb_queue_purge(&st->l2.i_queue); | |
682 | freewin(st); | |
683 | FsmChangeState(fi, ST_L2_6); | |
684 | st->l2.rc = 0; | |
685 | send_uframe(st, DISC | 0x10, CMD); | |
686 | FsmDelTimer(&st->l2.t203, 1); | |
687 | restart_t200(st, 2); | |
688 | } | |
689 | ||
690 | static void | |
691 | l2_start_multi(struct FsmInst *fi, int event, void *arg) | |
692 | { | |
693 | struct PStack *st = fi->userdata; | |
694 | struct sk_buff *skb = arg; | |
695 | ||
696 | send_uframe(st, UA | get_PollFlagFree(st, skb), RSP); | |
697 | ||
698 | clear_exception(&st->l2); | |
699 | st->l2.vs = 0; | |
700 | st->l2.va = 0; | |
701 | st->l2.vr = 0; | |
702 | st->l2.sow = 0; | |
703 | FsmChangeState(fi, ST_L2_7); | |
704 | FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3); | |
705 | ||
706 | st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL); | |
707 | } | |
708 | ||
709 | static void | |
710 | l2_send_UA(struct FsmInst *fi, int event, void *arg) | |
711 | { | |
712 | struct PStack *st = fi->userdata; | |
713 | struct sk_buff *skb = arg; | |
714 | ||
715 | send_uframe(st, UA | get_PollFlagFree(st, skb), RSP); | |
716 | } | |
717 | ||
718 | static void | |
719 | l2_send_DM(struct FsmInst *fi, int event, void *arg) | |
720 | { | |
721 | struct PStack *st = fi->userdata; | |
722 | struct sk_buff *skb = arg; | |
723 | ||
724 | send_uframe(st, DM | get_PollFlagFree(st, skb), RSP); | |
725 | } | |
726 | ||
727 | static void | |
728 | l2_restart_multi(struct FsmInst *fi, int event, void *arg) | |
729 | { | |
730 | struct PStack *st = fi->userdata; | |
731 | struct sk_buff *skb = arg; | |
732 | int est = 0, state; | |
733 | ||
734 | state = fi->state; | |
735 | ||
736 | send_uframe(st, UA | get_PollFlagFree(st, skb), RSP); | |
737 | ||
738 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'F'); | |
739 | ||
740 | if (st->l2.vs != st->l2.va) { | |
741 | skb_queue_purge(&st->l2.i_queue); | |
742 | est = 1; | |
743 | } | |
744 | ||
745 | clear_exception(&st->l2); | |
746 | st->l2.vs = 0; | |
747 | st->l2.va = 0; | |
748 | st->l2.vr = 0; | |
749 | st->l2.sow = 0; | |
750 | FsmChangeState(fi, ST_L2_7); | |
751 | stop_t200(st, 3); | |
752 | FsmRestartTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3); | |
753 | ||
754 | if (est) | |
755 | st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL); | |
756 | ||
757 | if ((ST_L2_7==state) || (ST_L2_8 == state)) | |
b03efcfb | 758 | if (!skb_queue_empty(&st->l2.i_queue) && cansend(st)) |
1da177e4 LT |
759 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
760 | } | |
761 | ||
762 | static void | |
763 | l2_stop_multi(struct FsmInst *fi, int event, void *arg) | |
764 | { | |
765 | struct PStack *st = fi->userdata; | |
766 | struct sk_buff *skb = arg; | |
767 | ||
768 | FsmChangeState(fi, ST_L2_4); | |
769 | FsmDelTimer(&st->l2.t203, 3); | |
770 | stop_t200(st, 4); | |
771 | ||
772 | send_uframe(st, UA | get_PollFlagFree(st, skb), RSP); | |
773 | ||
774 | skb_queue_purge(&st->l2.i_queue); | |
775 | freewin(st); | |
776 | lapb_dl_release_l2l3(st, INDICATION); | |
777 | } | |
778 | ||
779 | static void | |
780 | l2_connected(struct FsmInst *fi, int event, void *arg) | |
781 | { | |
782 | struct PStack *st = fi->userdata; | |
783 | struct sk_buff *skb = arg; | |
784 | int pr=-1; | |
785 | ||
786 | if (!get_PollFlag(st, skb)) { | |
787 | l2_mdl_error_ua(fi, event, arg); | |
788 | return; | |
789 | } | |
672c3fd9 | 790 | dev_kfree_skb(skb); |
1da177e4 LT |
791 | |
792 | if (test_and_clear_bit(FLG_PEND_REL, &st->l2.flag)) | |
793 | l2_disconnect(fi, event, arg); | |
794 | ||
795 | if (test_and_clear_bit(FLG_L3_INIT, &st->l2.flag)) { | |
796 | pr = DL_ESTABLISH | CONFIRM; | |
797 | } else if (st->l2.vs != st->l2.va) { | |
798 | skb_queue_purge(&st->l2.i_queue); | |
799 | pr = DL_ESTABLISH | INDICATION; | |
800 | } | |
801 | ||
802 | stop_t200(st, 5); | |
803 | ||
804 | st->l2.vr = 0; | |
805 | st->l2.vs = 0; | |
806 | st->l2.va = 0; | |
807 | st->l2.sow = 0; | |
808 | FsmChangeState(fi, ST_L2_7); | |
809 | FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 4); | |
810 | ||
811 | if (pr != -1) | |
812 | st->l2.l2l3(st, pr, NULL); | |
813 | ||
b03efcfb | 814 | if (!skb_queue_empty(&st->l2.i_queue) && cansend(st)) |
1da177e4 LT |
815 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
816 | } | |
817 | ||
818 | static void | |
819 | l2_released(struct FsmInst *fi, int event, void *arg) | |
820 | { | |
821 | struct PStack *st = fi->userdata; | |
822 | struct sk_buff *skb = arg; | |
823 | ||
824 | if (!get_PollFlag(st, skb)) { | |
825 | l2_mdl_error_ua(fi, event, arg); | |
826 | return; | |
827 | } | |
672c3fd9 | 828 | dev_kfree_skb(skb); |
1da177e4 LT |
829 | |
830 | stop_t200(st, 6); | |
831 | lapb_dl_release_l2l3(st, CONFIRM); | |
832 | FsmChangeState(fi, ST_L2_4); | |
833 | } | |
834 | ||
835 | static void | |
836 | l2_reestablish(struct FsmInst *fi, int event, void *arg) | |
837 | { | |
838 | struct PStack *st = fi->userdata; | |
839 | struct sk_buff *skb = arg; | |
840 | ||
841 | if (!get_PollFlagFree(st, skb)) { | |
842 | establishlink(fi); | |
843 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); | |
844 | } | |
845 | } | |
846 | ||
847 | static void | |
848 | l2_st5_dm_release(struct FsmInst *fi, int event, void *arg) | |
849 | { | |
850 | struct PStack *st = fi->userdata; | |
851 | struct sk_buff *skb = arg; | |
852 | ||
853 | if (get_PollFlagFree(st, skb)) { | |
854 | stop_t200(st, 7); | |
855 | if (!test_bit(FLG_L3_INIT, &st->l2.flag)) | |
856 | skb_queue_purge(&st->l2.i_queue); | |
857 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
858 | st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL); | |
859 | st5_dl_release_l2l3(st); | |
860 | FsmChangeState(fi, ST_L2_4); | |
861 | } | |
862 | } | |
863 | ||
864 | static void | |
865 | l2_st6_dm_release(struct FsmInst *fi, int event, void *arg) | |
866 | { | |
867 | struct PStack *st = fi->userdata; | |
868 | struct sk_buff *skb = arg; | |
869 | ||
870 | if (get_PollFlagFree(st, skb)) { | |
871 | stop_t200(st, 8); | |
872 | lapb_dl_release_l2l3(st, CONFIRM); | |
873 | FsmChangeState(fi, ST_L2_4); | |
874 | } | |
875 | } | |
876 | ||
672c3fd9 | 877 | static inline void |
1da177e4 LT |
878 | enquiry_cr(struct PStack *st, u_char typ, u_char cr, u_char pf) |
879 | { | |
880 | struct sk_buff *skb; | |
881 | struct Layer2 *l2; | |
882 | u_char tmp[MAX_HEADER_LEN]; | |
883 | int i; | |
884 | ||
885 | l2 = &st->l2; | |
886 | i = sethdraddr(l2, tmp, cr); | |
887 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
888 | tmp[i++] = typ; | |
889 | tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0); | |
890 | } else | |
891 | tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0); | |
892 | if (!(skb = alloc_skb(i, GFP_ATOMIC))) { | |
893 | printk(KERN_WARNING "isdl2 can't alloc sbbuff for enquiry_cr\n"); | |
894 | return; | |
895 | } | |
896 | memcpy(skb_put(skb, i), tmp, i); | |
897 | enqueue_super(st, skb); | |
898 | } | |
899 | ||
672c3fd9 | 900 | static inline void |
1da177e4 LT |
901 | enquiry_response(struct PStack *st) |
902 | { | |
903 | if (test_bit(FLG_OWN_BUSY, &st->l2.flag)) | |
904 | enquiry_cr(st, RNR, RSP, 1); | |
905 | else | |
906 | enquiry_cr(st, RR, RSP, 1); | |
907 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); | |
908 | } | |
909 | ||
672c3fd9 | 910 | static inline void |
1da177e4 LT |
911 | transmit_enquiry(struct PStack *st) |
912 | { | |
913 | if (test_bit(FLG_OWN_BUSY, &st->l2.flag)) | |
914 | enquiry_cr(st, RNR, CMD, 1); | |
915 | else | |
916 | enquiry_cr(st, RR, CMD, 1); | |
917 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); | |
918 | start_t200(st, 9); | |
919 | } | |
920 | ||
921 | ||
922 | static void | |
923 | nrerrorrecovery(struct FsmInst *fi) | |
924 | { | |
925 | struct PStack *st = fi->userdata; | |
926 | ||
927 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'J'); | |
928 | establishlink(fi); | |
929 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); | |
930 | } | |
931 | ||
932 | static void | |
933 | invoke_retransmission(struct PStack *st, unsigned int nr) | |
934 | { | |
935 | struct Layer2 *l2 = &st->l2; | |
936 | u_int p1; | |
937 | u_long flags; | |
938 | ||
939 | spin_lock_irqsave(&l2->lock, flags); | |
940 | if (l2->vs != nr) { | |
941 | while (l2->vs != nr) { | |
942 | (l2->vs)--; | |
943 | if(test_bit(FLG_MOD128, &l2->flag)) { | |
944 | l2->vs %= 128; | |
945 | p1 = (l2->vs - l2->va) % 128; | |
946 | } else { | |
947 | l2->vs %= 8; | |
948 | p1 = (l2->vs - l2->va) % 8; | |
949 | } | |
950 | p1 = (p1 + l2->sow) % l2->window; | |
951 | if (test_bit(FLG_LAPB, &l2->flag)) | |
952 | st->l1.bcs->tx_cnt += l2->windowar[p1]->len + l2headersize(l2, 0); | |
953 | skb_queue_head(&l2->i_queue, l2->windowar[p1]); | |
954 | l2->windowar[p1] = NULL; | |
955 | } | |
956 | spin_unlock_irqrestore(&l2->lock, flags); | |
957 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); | |
958 | return; | |
959 | } | |
960 | spin_unlock_irqrestore(&l2->lock, flags); | |
961 | } | |
962 | ||
963 | static void | |
964 | l2_st7_got_super(struct FsmInst *fi, int event, void *arg) | |
965 | { | |
966 | struct PStack *st = fi->userdata; | |
967 | struct sk_buff *skb = arg; | |
968 | int PollFlag, rsp, typ = RR; | |
969 | unsigned int nr; | |
970 | struct Layer2 *l2 = &st->l2; | |
971 | ||
972 | rsp = *skb->data & 0x2; | |
973 | if (test_bit(FLG_ORIG, &l2->flag)) | |
974 | rsp = !rsp; | |
975 | ||
976 | skb_pull(skb, l2addrsize(l2)); | |
977 | if (IsRNR(skb->data, st)) { | |
978 | set_peer_busy(l2); | |
979 | typ = RNR; | |
980 | } else | |
981 | clear_peer_busy(l2); | |
982 | if (IsREJ(skb->data, st)) | |
983 | typ = REJ; | |
984 | ||
985 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
986 | PollFlag = (skb->data[1] & 0x1) == 0x1; | |
987 | nr = skb->data[1] >> 1; | |
988 | } else { | |
989 | PollFlag = (skb->data[0] & 0x10); | |
990 | nr = (skb->data[0] >> 5) & 0x7; | |
991 | } | |
672c3fd9 | 992 | dev_kfree_skb(skb); |
1da177e4 LT |
993 | |
994 | if (PollFlag) { | |
995 | if (rsp) | |
996 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'A'); | |
997 | else | |
998 | enquiry_response(st); | |
999 | } | |
1000 | if (legalnr(st, nr)) { | |
1001 | if (typ == REJ) { | |
1002 | setva(st, nr); | |
1003 | invoke_retransmission(st, nr); | |
1004 | stop_t200(st, 10); | |
1005 | if (FsmAddTimer(&st->l2.t203, st->l2.T203, | |
1006 | EV_L2_T203, NULL, 6)) | |
1007 | l2m_debug(&st->l2.l2m, "Restart T203 ST7 REJ"); | |
1008 | } else if ((nr == l2->vs) && (typ == RR)) { | |
1009 | setva(st, nr); | |
1010 | stop_t200(st, 11); | |
1011 | FsmRestartTimer(&st->l2.t203, st->l2.T203, | |
1012 | EV_L2_T203, NULL, 7); | |
1013 | } else if ((l2->va != nr) || (typ == RNR)) { | |
1014 | setva(st, nr); | |
1015 | if(typ != RR) FsmDelTimer(&st->l2.t203, 9); | |
1016 | restart_t200(st, 12); | |
1017 | } | |
b03efcfb | 1018 | if (!skb_queue_empty(&st->l2.i_queue) && (typ == RR)) |
1da177e4 LT |
1019 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
1020 | } else | |
1021 | nrerrorrecovery(fi); | |
1022 | } | |
1023 | ||
1024 | static void | |
1025 | l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg) | |
1026 | { | |
1027 | struct PStack *st = fi->userdata; | |
1028 | struct sk_buff *skb = arg; | |
1029 | ||
1030 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
1031 | st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0); | |
1032 | if (!test_bit(FLG_L3_INIT, &st->l2.flag)) | |
1033 | skb_queue_tail(&st->l2.i_queue, skb); | |
1034 | else | |
672c3fd9 | 1035 | dev_kfree_skb(skb); |
1da177e4 LT |
1036 | } |
1037 | ||
1038 | static void | |
1039 | l2_feed_i_pull(struct FsmInst *fi, int event, void *arg) | |
1040 | { | |
1041 | struct PStack *st = fi->userdata; | |
1042 | struct sk_buff *skb = arg; | |
1043 | ||
1044 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
1045 | st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0); | |
1046 | skb_queue_tail(&st->l2.i_queue, skb); | |
1047 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); | |
1048 | } | |
1049 | ||
1050 | static void | |
1051 | l2_feed_iqueue(struct FsmInst *fi, int event, void *arg) | |
1052 | { | |
1053 | struct PStack *st = fi->userdata; | |
1054 | struct sk_buff *skb = arg; | |
1055 | ||
1056 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
1057 | st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0); | |
1058 | skb_queue_tail(&st->l2.i_queue, skb); | |
1059 | } | |
1060 | ||
1061 | static void | |
1062 | l2_got_iframe(struct FsmInst *fi, int event, void *arg) | |
1063 | { | |
1064 | struct PStack *st = fi->userdata; | |
1065 | struct sk_buff *skb = arg; | |
1066 | struct Layer2 *l2 = &(st->l2); | |
1067 | int PollFlag, ns, i; | |
1068 | unsigned int nr; | |
1069 | ||
1070 | i = l2addrsize(l2); | |
1071 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1072 | PollFlag = ((skb->data[i + 1] & 0x1) == 0x1); | |
1073 | ns = skb->data[i] >> 1; | |
1074 | nr = (skb->data[i + 1] >> 1) & 0x7f; | |
1075 | } else { | |
1076 | PollFlag = (skb->data[i] & 0x10); | |
1077 | ns = (skb->data[i] >> 1) & 0x7; | |
1078 | nr = (skb->data[i] >> 5) & 0x7; | |
1079 | } | |
1080 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) { | |
672c3fd9 | 1081 | dev_kfree_skb(skb); |
1da177e4 LT |
1082 | if(PollFlag) enquiry_response(st); |
1083 | } else if (l2->vr == ns) { | |
1084 | (l2->vr)++; | |
1085 | if(test_bit(FLG_MOD128, &l2->flag)) | |
1086 | l2->vr %= 128; | |
1087 | else | |
1088 | l2->vr %= 8; | |
1089 | test_and_clear_bit(FLG_REJEXC, &l2->flag); | |
1090 | ||
1091 | if (PollFlag) | |
1092 | enquiry_response(st); | |
1093 | else | |
1094 | test_and_set_bit(FLG_ACK_PEND, &l2->flag); | |
1095 | skb_pull(skb, l2headersize(l2, 0)); | |
1096 | st->l2.l2l3(st, DL_DATA | INDICATION, skb); | |
1097 | } else { | |
1098 | /* n(s)!=v(r) */ | |
672c3fd9 | 1099 | dev_kfree_skb(skb); |
1da177e4 LT |
1100 | if (test_and_set_bit(FLG_REJEXC, &l2->flag)) { |
1101 | if (PollFlag) | |
1102 | enquiry_response(st); | |
1103 | } else { | |
1104 | enquiry_cr(st, REJ, RSP, PollFlag); | |
1105 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1106 | } | |
1107 | } | |
1108 | ||
1109 | if (legalnr(st, nr)) { | |
1110 | if (!test_bit(FLG_PEER_BUSY, &st->l2.flag) && (fi->state == ST_L2_7)) { | |
1111 | if (nr == st->l2.vs) { | |
1112 | stop_t200(st, 13); | |
1113 | FsmRestartTimer(&st->l2.t203, st->l2.T203, | |
1114 | EV_L2_T203, NULL, 7); | |
1115 | } else if (nr != st->l2.va) | |
1116 | restart_t200(st, 14); | |
1117 | } | |
1118 | setva(st, nr); | |
1119 | } else { | |
1120 | nrerrorrecovery(fi); | |
1121 | return; | |
1122 | } | |
1123 | ||
b03efcfb | 1124 | if (!skb_queue_empty(&st->l2.i_queue) && (fi->state == ST_L2_7)) |
1da177e4 LT |
1125 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
1126 | if (test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag)) | |
1127 | enquiry_cr(st, RR, RSP, 0); | |
1128 | } | |
1129 | ||
1130 | static void | |
1131 | l2_got_tei(struct FsmInst *fi, int event, void *arg) | |
1132 | { | |
1133 | struct PStack *st = fi->userdata; | |
1134 | ||
1135 | st->l2.tei = (long) arg; | |
1136 | ||
1137 | if (fi->state == ST_L2_3) { | |
1138 | establishlink(fi); | |
1139 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); | |
1140 | } else | |
1141 | FsmChangeState(fi, ST_L2_4); | |
b03efcfb | 1142 | if (!skb_queue_empty(&st->l2.ui_queue)) |
1da177e4 LT |
1143 | tx_ui(st); |
1144 | } | |
1145 | ||
1146 | static void | |
1147 | l2_st5_tout_200(struct FsmInst *fi, int event, void *arg) | |
1148 | { | |
1149 | struct PStack *st = fi->userdata; | |
1150 | ||
1151 | if (test_bit(FLG_LAPD, &st->l2.flag) && | |
1152 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { | |
1153 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); | |
1154 | } else if (st->l2.rc == st->l2.N200) { | |
1155 | FsmChangeState(fi, ST_L2_4); | |
1156 | test_and_clear_bit(FLG_T200_RUN, &st->l2.flag); | |
1157 | skb_queue_purge(&st->l2.i_queue); | |
1158 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'G'); | |
1159 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
1160 | st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL); | |
1161 | st5_dl_release_l2l3(st); | |
1162 | } else { | |
1163 | st->l2.rc++; | |
1164 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); | |
1165 | send_uframe(st, (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM) | |
1166 | | 0x10, CMD); | |
1167 | } | |
1168 | } | |
1169 | ||
1170 | static void | |
1171 | l2_st6_tout_200(struct FsmInst *fi, int event, void *arg) | |
1172 | { | |
1173 | struct PStack *st = fi->userdata; | |
1174 | ||
1175 | if (test_bit(FLG_LAPD, &st->l2.flag) && | |
1176 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { | |
1177 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); | |
1178 | } else if (st->l2.rc == st->l2.N200) { | |
1179 | FsmChangeState(fi, ST_L2_4); | |
1180 | test_and_clear_bit(FLG_T200_RUN, &st->l2.flag); | |
1181 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'H'); | |
1182 | lapb_dl_release_l2l3(st, CONFIRM); | |
1183 | } else { | |
1184 | st->l2.rc++; | |
1185 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, | |
1186 | NULL, 9); | |
1187 | send_uframe(st, DISC | 0x10, CMD); | |
1188 | } | |
1189 | } | |
1190 | ||
1191 | static void | |
1192 | l2_st7_tout_200(struct FsmInst *fi, int event, void *arg) | |
1193 | { | |
1194 | struct PStack *st = fi->userdata; | |
1195 | ||
1196 | if (test_bit(FLG_LAPD, &st->l2.flag) && | |
1197 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { | |
1198 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); | |
1199 | return; | |
1200 | } | |
1201 | test_and_clear_bit(FLG_T200_RUN, &st->l2.flag); | |
1202 | st->l2.rc = 0; | |
1203 | FsmChangeState(fi, ST_L2_8); | |
1204 | ||
1205 | transmit_enquiry(st); | |
1206 | st->l2.rc++; | |
1207 | } | |
1208 | ||
1209 | static void | |
1210 | l2_st8_tout_200(struct FsmInst *fi, int event, void *arg) | |
1211 | { | |
1212 | struct PStack *st = fi->userdata; | |
1213 | ||
1214 | if (test_bit(FLG_LAPD, &st->l2.flag) && | |
1215 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { | |
1216 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); | |
1217 | return; | |
1218 | } | |
1219 | test_and_clear_bit(FLG_T200_RUN, &st->l2.flag); | |
1220 | if (st->l2.rc == st->l2.N200) { | |
1221 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'I'); | |
1222 | establishlink(fi); | |
1223 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); | |
1224 | } else { | |
1225 | transmit_enquiry(st); | |
1226 | st->l2.rc++; | |
1227 | } | |
1228 | } | |
1229 | ||
1230 | static void | |
1231 | l2_st7_tout_203(struct FsmInst *fi, int event, void *arg) | |
1232 | { | |
1233 | struct PStack *st = fi->userdata; | |
1234 | ||
1235 | if (test_bit(FLG_LAPD, &st->l2.flag) && | |
1236 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { | |
1237 | FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 9); | |
1238 | return; | |
1239 | } | |
1240 | FsmChangeState(fi, ST_L2_8); | |
1241 | transmit_enquiry(st); | |
1242 | st->l2.rc = 0; | |
1243 | } | |
1244 | ||
1245 | static void | |
1246 | l2_pull_iqueue(struct FsmInst *fi, int event, void *arg) | |
1247 | { | |
1248 | struct PStack *st = fi->userdata; | |
1249 | struct sk_buff *skb, *oskb; | |
1250 | struct Layer2 *l2 = &st->l2; | |
1251 | u_char header[MAX_HEADER_LEN]; | |
1252 | int i; | |
1253 | int unsigned p1; | |
1254 | u_long flags; | |
1255 | ||
1256 | if (!cansend(st)) | |
1257 | return; | |
1258 | ||
1259 | skb = skb_dequeue(&l2->i_queue); | |
1260 | if (!skb) | |
1261 | return; | |
1262 | ||
1263 | spin_lock_irqsave(&l2->lock, flags); | |
1264 | if(test_bit(FLG_MOD128, &l2->flag)) | |
1265 | p1 = (l2->vs - l2->va) % 128; | |
1266 | else | |
1267 | p1 = (l2->vs - l2->va) % 8; | |
1268 | p1 = (p1 + l2->sow) % l2->window; | |
1269 | if (l2->windowar[p1]) { | |
1270 | printk(KERN_WARNING "isdnl2 try overwrite ack queue entry %d\n", | |
1271 | p1); | |
1272 | dev_kfree_skb(l2->windowar[p1]); | |
1273 | } | |
1274 | l2->windowar[p1] = skb_clone(skb, GFP_ATOMIC); | |
1275 | ||
1276 | i = sethdraddr(&st->l2, header, CMD); | |
1277 | ||
1278 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1279 | header[i++] = l2->vs << 1; | |
1280 | header[i++] = l2->vr << 1; | |
1281 | l2->vs = (l2->vs + 1) % 128; | |
1282 | } else { | |
1283 | header[i++] = (l2->vr << 5) | (l2->vs << 1); | |
1284 | l2->vs = (l2->vs + 1) % 8; | |
1285 | } | |
1286 | spin_unlock_irqrestore(&l2->lock, flags); | |
1287 | p1 = skb->data - skb->head; | |
1288 | if (p1 >= i) | |
1289 | memcpy(skb_push(skb, i), header, i); | |
1290 | else { | |
1291 | printk(KERN_WARNING | |
1292 | "isdl2 pull_iqueue skb header(%d/%d) too short\n", i, p1); | |
1293 | oskb = skb; | |
1294 | skb = alloc_skb(oskb->len + i, GFP_ATOMIC); | |
1295 | memcpy(skb_put(skb, i), header, i); | |
d626f62b ACM |
1296 | skb_copy_from_linear_data(oskb, |
1297 | skb_put(skb, oskb->len), oskb->len); | |
672c3fd9 | 1298 | dev_kfree_skb(oskb); |
1da177e4 LT |
1299 | } |
1300 | st->l2.l2l1(st, PH_PULL | INDICATION, skb); | |
1301 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); | |
1302 | if (!test_and_set_bit(FLG_T200_RUN, &st->l2.flag)) { | |
1303 | FsmDelTimer(&st->l2.t203, 13); | |
1304 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 11); | |
1305 | } | |
b03efcfb | 1306 | if (!skb_queue_empty(&l2->i_queue) && cansend(st)) |
1da177e4 LT |
1307 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
1308 | } | |
1309 | ||
1310 | static void | |
1311 | l2_st8_got_super(struct FsmInst *fi, int event, void *arg) | |
1312 | { | |
1313 | struct PStack *st = fi->userdata; | |
1314 | struct sk_buff *skb = arg; | |
1315 | int PollFlag, rsp, rnr = 0; | |
1316 | unsigned int nr; | |
1317 | struct Layer2 *l2 = &st->l2; | |
1318 | ||
1319 | rsp = *skb->data & 0x2; | |
1320 | if (test_bit(FLG_ORIG, &l2->flag)) | |
1321 | rsp = !rsp; | |
1322 | ||
1323 | skb_pull(skb, l2addrsize(l2)); | |
1324 | ||
1325 | if (IsRNR(skb->data, st)) { | |
1326 | set_peer_busy(l2); | |
1327 | rnr = 1; | |
1328 | } else | |
1329 | clear_peer_busy(l2); | |
1330 | ||
1331 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1332 | PollFlag = (skb->data[1] & 0x1) == 0x1; | |
1333 | nr = skb->data[1] >> 1; | |
1334 | } else { | |
1335 | PollFlag = (skb->data[0] & 0x10); | |
1336 | nr = (skb->data[0] >> 5) & 0x7; | |
1337 | } | |
672c3fd9 | 1338 | dev_kfree_skb(skb); |
1da177e4 LT |
1339 | |
1340 | if (rsp && PollFlag) { | |
1341 | if (legalnr(st, nr)) { | |
1342 | if (rnr) { | |
1343 | restart_t200(st, 15); | |
1344 | } else { | |
1345 | stop_t200(st, 16); | |
1346 | FsmAddTimer(&l2->t203, l2->T203, | |
1347 | EV_L2_T203, NULL, 5); | |
1348 | setva(st, nr); | |
1349 | } | |
1350 | invoke_retransmission(st, nr); | |
1351 | FsmChangeState(fi, ST_L2_7); | |
b03efcfb | 1352 | if (!skb_queue_empty(&l2->i_queue) && cansend(st)) |
1da177e4 LT |
1353 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); |
1354 | } else | |
1355 | nrerrorrecovery(fi); | |
1356 | } else { | |
1357 | if (!rsp && PollFlag) | |
1358 | enquiry_response(st); | |
1359 | if (legalnr(st, nr)) { | |
1360 | setva(st, nr); | |
1361 | } else | |
1362 | nrerrorrecovery(fi); | |
1363 | } | |
1364 | } | |
1365 | ||
1366 | static void | |
1367 | l2_got_FRMR(struct FsmInst *fi, int event, void *arg) | |
1368 | { | |
1369 | struct PStack *st = fi->userdata; | |
1370 | struct sk_buff *skb = arg; | |
1371 | ||
1372 | skb_pull(skb, l2addrsize(&st->l2) + 1); | |
1373 | ||
1374 | if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */ | |
1375 | (IsUA(skb->data) && (fi->state == ST_L2_7))) { | |
1376 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'K'); | |
1377 | establishlink(fi); | |
1378 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); | |
1379 | } | |
672c3fd9 | 1380 | dev_kfree_skb(skb); |
1da177e4 LT |
1381 | } |
1382 | ||
1383 | static void | |
1384 | l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1385 | { | |
1386 | struct PStack *st = fi->userdata; | |
1387 | ||
1388 | skb_queue_purge(&st->l2.ui_queue); | |
1389 | st->l2.tei = -1; | |
1390 | FsmChangeState(fi, ST_L2_1); | |
1391 | } | |
1392 | ||
1393 | static void | |
1394 | l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1395 | { | |
1396 | struct PStack *st = fi->userdata; | |
1397 | ||
1398 | skb_queue_purge(&st->l2.ui_queue); | |
1399 | st->l2.tei = -1; | |
1400 | st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL); | |
1401 | FsmChangeState(fi, ST_L2_1); | |
1402 | } | |
1403 | ||
1404 | static void | |
1405 | l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1406 | { | |
1407 | struct PStack *st = fi->userdata; | |
1408 | ||
1409 | skb_queue_purge(&st->l2.i_queue); | |
1410 | skb_queue_purge(&st->l2.ui_queue); | |
1411 | freewin(st); | |
1412 | st->l2.tei = -1; | |
1413 | stop_t200(st, 17); | |
1414 | st5_dl_release_l2l3(st); | |
1415 | FsmChangeState(fi, ST_L2_1); | |
1416 | } | |
1417 | ||
1418 | static void | |
1419 | l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1420 | { | |
1421 | struct PStack *st = fi->userdata; | |
1422 | ||
1423 | skb_queue_purge(&st->l2.ui_queue); | |
1424 | st->l2.tei = -1; | |
1425 | stop_t200(st, 18); | |
1426 | st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL); | |
1427 | FsmChangeState(fi, ST_L2_1); | |
1428 | } | |
1429 | ||
1430 | static void | |
1431 | l2_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1432 | { | |
1433 | struct PStack *st = fi->userdata; | |
1434 | ||
1435 | skb_queue_purge(&st->l2.i_queue); | |
1436 | skb_queue_purge(&st->l2.ui_queue); | |
1437 | freewin(st); | |
1438 | st->l2.tei = -1; | |
1439 | stop_t200(st, 17); | |
1440 | FsmDelTimer(&st->l2.t203, 19); | |
1441 | st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL); | |
1442 | FsmChangeState(fi, ST_L2_1); | |
1443 | } | |
1444 | ||
1445 | static void | |
6b44d4e6 | 1446 | l2_st14_persistent_da(struct FsmInst *fi, int event, void *arg) |
1da177e4 LT |
1447 | { |
1448 | struct PStack *st = fi->userdata; | |
1449 | ||
1450 | skb_queue_purge(&st->l2.i_queue); | |
1451 | skb_queue_purge(&st->l2.ui_queue); | |
1452 | if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag)) | |
1453 | st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL); | |
1454 | } | |
1455 | ||
1456 | static void | |
6b44d4e6 | 1457 | l2_st5_persistent_da(struct FsmInst *fi, int event, void *arg) |
1da177e4 LT |
1458 | { |
1459 | struct PStack *st = fi->userdata; | |
1460 | ||
1461 | skb_queue_purge(&st->l2.i_queue); | |
1462 | skb_queue_purge(&st->l2.ui_queue); | |
1463 | freewin(st); | |
1464 | stop_t200(st, 19); | |
1465 | st5_dl_release_l2l3(st); | |
1466 | FsmChangeState(fi, ST_L2_4); | |
1467 | } | |
1468 | ||
1469 | static void | |
6b44d4e6 | 1470 | l2_st6_persistent_da(struct FsmInst *fi, int event, void *arg) |
1da177e4 LT |
1471 | { |
1472 | struct PStack *st = fi->userdata; | |
1473 | ||
1474 | skb_queue_purge(&st->l2.ui_queue); | |
1475 | stop_t200(st, 20); | |
1476 | st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL); | |
1477 | FsmChangeState(fi, ST_L2_4); | |
1478 | } | |
1479 | ||
1480 | static void | |
6b44d4e6 | 1481 | l2_persistent_da(struct FsmInst *fi, int event, void *arg) |
1da177e4 LT |
1482 | { |
1483 | struct PStack *st = fi->userdata; | |
1484 | ||
1485 | skb_queue_purge(&st->l2.i_queue); | |
1486 | skb_queue_purge(&st->l2.ui_queue); | |
1487 | freewin(st); | |
1488 | stop_t200(st, 19); | |
1489 | FsmDelTimer(&st->l2.t203, 19); | |
1490 | st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL); | |
1491 | FsmChangeState(fi, ST_L2_4); | |
1492 | } | |
1493 | ||
1494 | static void | |
1495 | l2_set_own_busy(struct FsmInst *fi, int event, void *arg) | |
1496 | { | |
1497 | struct PStack *st = fi->userdata; | |
1498 | ||
1499 | if(!test_and_set_bit(FLG_OWN_BUSY, &st->l2.flag)) { | |
1500 | enquiry_cr(st, RNR, RSP, 0); | |
1501 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); | |
1502 | } | |
1503 | } | |
1504 | ||
1505 | static void | |
1506 | l2_clear_own_busy(struct FsmInst *fi, int event, void *arg) | |
1507 | { | |
1508 | struct PStack *st = fi->userdata; | |
1509 | ||
1510 | if(!test_and_clear_bit(FLG_OWN_BUSY, &st->l2.flag)) { | |
1511 | enquiry_cr(st, RR, RSP, 0); | |
1512 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | static void | |
1517 | l2_frame_error(struct FsmInst *fi, int event, void *arg) | |
1518 | { | |
1519 | struct PStack *st = fi->userdata; | |
1520 | ||
1521 | st->ma.layer(st, MDL_ERROR | INDICATION, arg); | |
1522 | } | |
1523 | ||
1524 | static void | |
1525 | l2_frame_error_reest(struct FsmInst *fi, int event, void *arg) | |
1526 | { | |
1527 | struct PStack *st = fi->userdata; | |
1528 | ||
1529 | st->ma.layer(st, MDL_ERROR | INDICATION, arg); | |
1530 | establishlink(fi); | |
1531 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); | |
1532 | } | |
1533 | ||
1534 | static struct FsmNode L2FnList[] __initdata = | |
1535 | { | |
1536 | {ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign}, | |
1537 | {ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3}, | |
1538 | {ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish}, | |
1539 | {ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3}, | |
1540 | {ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, | |
1541 | {ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, | |
1542 | {ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release}, | |
1543 | {ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel}, | |
1544 | {ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect}, | |
1545 | {ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect}, | |
1546 | {ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest}, | |
1547 | {ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull}, | |
1548 | {ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue}, | |
1549 | {ST_L2_1, EV_L2_DL_UNIT_DATA, l2_queue_ui_assign}, | |
1550 | {ST_L2_2, EV_L2_DL_UNIT_DATA, l2_queue_ui}, | |
1551 | {ST_L2_3, EV_L2_DL_UNIT_DATA, l2_queue_ui}, | |
1552 | {ST_L2_4, EV_L2_DL_UNIT_DATA, l2_send_ui}, | |
1553 | {ST_L2_5, EV_L2_DL_UNIT_DATA, l2_send_ui}, | |
1554 | {ST_L2_6, EV_L2_DL_UNIT_DATA, l2_send_ui}, | |
1555 | {ST_L2_7, EV_L2_DL_UNIT_DATA, l2_send_ui}, | |
1556 | {ST_L2_8, EV_L2_DL_UNIT_DATA, l2_send_ui}, | |
1557 | {ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1558 | {ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1559 | {ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1560 | {ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove}, | |
1561 | {ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove}, | |
1562 | {ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove}, | |
1563 | {ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove}, | |
1564 | {ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove}, | |
1565 | {ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove}, | |
1566 | {ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove}, | |
1567 | {ST_L2_4, EV_L2_SABME, l2_start_multi}, | |
1568 | {ST_L2_5, EV_L2_SABME, l2_send_UA}, | |
1569 | {ST_L2_6, EV_L2_SABME, l2_send_DM}, | |
1570 | {ST_L2_7, EV_L2_SABME, l2_restart_multi}, | |
1571 | {ST_L2_8, EV_L2_SABME, l2_restart_multi}, | |
1572 | {ST_L2_4, EV_L2_DISC, l2_send_DM}, | |
1573 | {ST_L2_5, EV_L2_DISC, l2_send_DM}, | |
1574 | {ST_L2_6, EV_L2_DISC, l2_send_UA}, | |
1575 | {ST_L2_7, EV_L2_DISC, l2_stop_multi}, | |
1576 | {ST_L2_8, EV_L2_DISC, l2_stop_multi}, | |
1577 | {ST_L2_4, EV_L2_UA, l2_mdl_error_ua}, | |
1578 | {ST_L2_5, EV_L2_UA, l2_connected}, | |
1579 | {ST_L2_6, EV_L2_UA, l2_released}, | |
1580 | {ST_L2_7, EV_L2_UA, l2_mdl_error_ua}, | |
1581 | {ST_L2_8, EV_L2_UA, l2_mdl_error_ua}, | |
1582 | {ST_L2_4, EV_L2_DM, l2_reestablish}, | |
1583 | {ST_L2_5, EV_L2_DM, l2_st5_dm_release}, | |
1584 | {ST_L2_6, EV_L2_DM, l2_st6_dm_release}, | |
1585 | {ST_L2_7, EV_L2_DM, l2_mdl_error_dm}, | |
1586 | {ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm}, | |
1587 | {ST_L2_1, EV_L2_UI, l2_got_ui}, | |
1588 | {ST_L2_2, EV_L2_UI, l2_got_ui}, | |
1589 | {ST_L2_3, EV_L2_UI, l2_got_ui}, | |
1590 | {ST_L2_4, EV_L2_UI, l2_got_ui}, | |
1591 | {ST_L2_5, EV_L2_UI, l2_got_ui}, | |
1592 | {ST_L2_6, EV_L2_UI, l2_got_ui}, | |
1593 | {ST_L2_7, EV_L2_UI, l2_got_ui}, | |
1594 | {ST_L2_8, EV_L2_UI, l2_got_ui}, | |
1595 | {ST_L2_7, EV_L2_FRMR, l2_got_FRMR}, | |
1596 | {ST_L2_8, EV_L2_FRMR, l2_got_FRMR}, | |
1597 | {ST_L2_7, EV_L2_SUPER, l2_st7_got_super}, | |
1598 | {ST_L2_8, EV_L2_SUPER, l2_st8_got_super}, | |
1599 | {ST_L2_7, EV_L2_I, l2_got_iframe}, | |
1600 | {ST_L2_8, EV_L2_I, l2_got_iframe}, | |
1601 | {ST_L2_5, EV_L2_T200, l2_st5_tout_200}, | |
1602 | {ST_L2_6, EV_L2_T200, l2_st6_tout_200}, | |
1603 | {ST_L2_7, EV_L2_T200, l2_st7_tout_200}, | |
1604 | {ST_L2_8, EV_L2_T200, l2_st8_tout_200}, | |
1605 | {ST_L2_7, EV_L2_T203, l2_st7_tout_203}, | |
1606 | {ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue}, | |
1607 | {ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, | |
1608 | {ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, | |
1609 | {ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, | |
1610 | {ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, | |
1611 | {ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1612 | {ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1613 | {ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1614 | {ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest}, | |
1615 | {ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest}, | |
6b44d4e6 | 1616 | {ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistent_da}, |
1da177e4 LT |
1617 | {ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove}, |
1618 | {ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove}, | |
6b44d4e6 JE |
1619 | {ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistent_da}, |
1620 | {ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistent_da}, | |
1621 | {ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistent_da}, | |
1622 | {ST_L2_7, EV_L1_DEACTIVATE, l2_persistent_da}, | |
1623 | {ST_L2_8, EV_L1_DEACTIVATE, l2_persistent_da}, | |
1da177e4 LT |
1624 | }; |
1625 | ||
1626 | #define L2_FN_COUNT (sizeof(L2FnList)/sizeof(struct FsmNode)) | |
1627 | ||
1628 | static void | |
1629 | isdnl2_l1l2(struct PStack *st, int pr, void *arg) | |
1630 | { | |
1631 | struct sk_buff *skb = arg; | |
1632 | u_char *datap; | |
1633 | int ret = 1, len; | |
1634 | int c = 0; | |
1635 | ||
1636 | switch (pr) { | |
1637 | case (PH_DATA | INDICATION): | |
1638 | datap = skb->data; | |
1639 | len = l2addrsize(&st->l2); | |
1640 | if (skb->len > len) | |
1641 | datap += len; | |
1642 | else { | |
1643 | FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'N'); | |
672c3fd9 | 1644 | dev_kfree_skb(skb); |
1da177e4 LT |
1645 | return; |
1646 | } | |
1647 | if (!(*datap & 1)) { /* I-Frame */ | |
1648 | if(!(c = iframe_error(st, skb))) | |
1649 | ret = FsmEvent(&st->l2.l2m, EV_L2_I, skb); | |
1650 | } else if (IsSFrame(datap, st)) { /* S-Frame */ | |
1651 | if(!(c = super_error(st, skb))) | |
1652 | ret = FsmEvent(&st->l2.l2m, EV_L2_SUPER, skb); | |
1653 | } else if (IsUI(datap)) { | |
1654 | if(!(c = UI_error(st, skb))) | |
1655 | ret = FsmEvent(&st->l2.l2m, EV_L2_UI, skb); | |
1656 | } else if (IsSABME(datap, st)) { | |
1657 | if(!(c = unnum_error(st, skb, CMD))) | |
1658 | ret = FsmEvent(&st->l2.l2m, EV_L2_SABME, skb); | |
1659 | } else if (IsUA(datap)) { | |
1660 | if(!(c = unnum_error(st, skb, RSP))) | |
1661 | ret = FsmEvent(&st->l2.l2m, EV_L2_UA, skb); | |
1662 | } else if (IsDISC(datap)) { | |
1663 | if(!(c = unnum_error(st, skb, CMD))) | |
1664 | ret = FsmEvent(&st->l2.l2m, EV_L2_DISC, skb); | |
1665 | } else if (IsDM(datap)) { | |
1666 | if(!(c = unnum_error(st, skb, RSP))) | |
1667 | ret = FsmEvent(&st->l2.l2m, EV_L2_DM, skb); | |
1668 | } else if (IsFRMR(datap)) { | |
1669 | if(!(c = FRMR_error(st,skb))) | |
1670 | ret = FsmEvent(&st->l2.l2m, EV_L2_FRMR, skb); | |
1671 | } else { | |
1672 | FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'L'); | |
672c3fd9 | 1673 | dev_kfree_skb(skb); |
1da177e4 LT |
1674 | ret = 0; |
1675 | } | |
1676 | if(c) { | |
672c3fd9 | 1677 | dev_kfree_skb(skb); |
1da177e4 LT |
1678 | FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *)(long)c); |
1679 | ret = 0; | |
1680 | } | |
1681 | if (ret) | |
672c3fd9 | 1682 | dev_kfree_skb(skb); |
1da177e4 LT |
1683 | break; |
1684 | case (PH_PULL | CONFIRM): | |
1685 | FsmEvent(&st->l2.l2m, EV_L2_ACK_PULL, arg); | |
1686 | break; | |
1687 | case (PH_PAUSE | INDICATION): | |
1688 | test_and_set_bit(FLG_DCHAN_BUSY, &st->l2.flag); | |
1689 | break; | |
1690 | case (PH_PAUSE | CONFIRM): | |
1691 | test_and_clear_bit(FLG_DCHAN_BUSY, &st->l2.flag); | |
1692 | break; | |
1693 | case (PH_ACTIVATE | CONFIRM): | |
1694 | case (PH_ACTIVATE | INDICATION): | |
1695 | test_and_set_bit(FLG_L1_ACTIV, &st->l2.flag); | |
1696 | if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag)) | |
1697 | FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg); | |
1698 | break; | |
1699 | case (PH_DEACTIVATE | INDICATION): | |
1700 | case (PH_DEACTIVATE | CONFIRM): | |
1701 | test_and_clear_bit(FLG_L1_ACTIV, &st->l2.flag); | |
1702 | FsmEvent(&st->l2.l2m, EV_L1_DEACTIVATE, arg); | |
1703 | break; | |
1704 | default: | |
1705 | l2m_debug(&st->l2.l2m, "l2 unknown pr %04x", pr); | |
1706 | break; | |
1707 | } | |
1708 | } | |
1709 | ||
1710 | static void | |
1711 | isdnl2_l3l2(struct PStack *st, int pr, void *arg) | |
1712 | { | |
1713 | switch (pr) { | |
1714 | case (DL_DATA | REQUEST): | |
1715 | if (FsmEvent(&st->l2.l2m, EV_L2_DL_DATA, arg)) { | |
1716 | dev_kfree_skb((struct sk_buff *) arg); | |
1717 | } | |
1718 | break; | |
1719 | case (DL_UNIT_DATA | REQUEST): | |
1720 | if (FsmEvent(&st->l2.l2m, EV_L2_DL_UNIT_DATA, arg)) { | |
1721 | dev_kfree_skb((struct sk_buff *) arg); | |
1722 | } | |
1723 | break; | |
1724 | case (DL_ESTABLISH | REQUEST): | |
1725 | if (test_bit(FLG_L1_ACTIV, &st->l2.flag)) { | |
1726 | if (test_bit(FLG_LAPD, &st->l2.flag) || | |
1727 | test_bit(FLG_ORIG, &st->l2.flag)) { | |
1728 | FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg); | |
1729 | } | |
1730 | } else { | |
1731 | if (test_bit(FLG_LAPD, &st->l2.flag) || | |
1732 | test_bit(FLG_ORIG, &st->l2.flag)) { | |
1733 | test_and_set_bit(FLG_ESTAB_PEND, &st->l2.flag); | |
1734 | } | |
1735 | st->l2.l2l1(st, PH_ACTIVATE, NULL); | |
1736 | } | |
1737 | break; | |
1738 | case (DL_RELEASE | REQUEST): | |
1739 | if (test_bit(FLG_LAPB, &st->l2.flag)) { | |
1740 | st->l2.l2l1(st, PH_DEACTIVATE, NULL); | |
1741 | } | |
1742 | FsmEvent(&st->l2.l2m, EV_L2_DL_RELEASE_REQ, arg); | |
1743 | break; | |
1744 | case (MDL_ASSIGN | REQUEST): | |
1745 | FsmEvent(&st->l2.l2m, EV_L2_MDL_ASSIGN, arg); | |
1746 | break; | |
1747 | case (MDL_REMOVE | REQUEST): | |
1748 | FsmEvent(&st->l2.l2m, EV_L2_MDL_REMOVE, arg); | |
1749 | break; | |
1750 | case (MDL_ERROR | RESPONSE): | |
1751 | FsmEvent(&st->l2.l2m, EV_L2_MDL_ERROR, arg); | |
1752 | break; | |
1753 | } | |
1754 | } | |
1755 | ||
1756 | void | |
1757 | releasestack_isdnl2(struct PStack *st) | |
1758 | { | |
1759 | FsmDelTimer(&st->l2.t200, 21); | |
1760 | FsmDelTimer(&st->l2.t203, 16); | |
1761 | skb_queue_purge(&st->l2.i_queue); | |
1762 | skb_queue_purge(&st->l2.ui_queue); | |
1763 | ReleaseWin(&st->l2); | |
1764 | } | |
1765 | ||
1766 | static void | |
1767 | l2m_debug(struct FsmInst *fi, char *fmt, ...) | |
1768 | { | |
1769 | va_list args; | |
1770 | struct PStack *st = fi->userdata; | |
1771 | ||
1772 | va_start(args, fmt); | |
1773 | VHiSax_putstatus(st->l1.hardware, st->l2.debug_id, fmt, args); | |
1774 | va_end(args); | |
1775 | } | |
1776 | ||
1777 | void | |
1778 | setstack_isdnl2(struct PStack *st, char *debug_id) | |
1779 | { | |
1780 | spin_lock_init(&st->l2.lock); | |
1781 | st->l1.l1l2 = isdnl2_l1l2; | |
1782 | st->l3.l3l2 = isdnl2_l3l2; | |
1783 | ||
1784 | skb_queue_head_init(&st->l2.i_queue); | |
1785 | skb_queue_head_init(&st->l2.ui_queue); | |
1786 | InitWin(&st->l2); | |
1787 | st->l2.debug = 0; | |
1788 | ||
1789 | st->l2.l2m.fsm = &l2fsm; | |
1790 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
1791 | st->l2.l2m.state = ST_L2_4; | |
1792 | else | |
1793 | st->l2.l2m.state = ST_L2_1; | |
1794 | st->l2.l2m.debug = 0; | |
1795 | st->l2.l2m.userdata = st; | |
1796 | st->l2.l2m.userint = 0; | |
1797 | st->l2.l2m.printdebug = l2m_debug; | |
1798 | strcpy(st->l2.debug_id, debug_id); | |
1799 | ||
1800 | FsmInitTimer(&st->l2.l2m, &st->l2.t200); | |
1801 | FsmInitTimer(&st->l2.l2m, &st->l2.t203); | |
1802 | } | |
1803 | ||
1804 | static void | |
1805 | transl2_l3l2(struct PStack *st, int pr, void *arg) | |
1806 | { | |
1807 | switch (pr) { | |
1808 | case (DL_DATA | REQUEST): | |
1809 | case (DL_UNIT_DATA | REQUEST): | |
1810 | st->l2.l2l1(st, PH_DATA | REQUEST, arg); | |
1811 | break; | |
1812 | case (DL_ESTABLISH | REQUEST): | |
1813 | st->l2.l2l1(st, PH_ACTIVATE | REQUEST, NULL); | |
1814 | break; | |
1815 | case (DL_RELEASE | REQUEST): | |
1816 | st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL); | |
1817 | break; | |
1818 | } | |
1819 | } | |
1820 | ||
1821 | void | |
1822 | setstack_transl2(struct PStack *st) | |
1823 | { | |
1824 | st->l3.l3l2 = transl2_l3l2; | |
1825 | } | |
1826 | ||
1827 | void | |
1828 | releasestack_transl2(struct PStack *st) | |
1829 | { | |
1830 | } | |
1831 | ||
1832 | int __init | |
1833 | Isdnl2New(void) | |
1834 | { | |
1835 | l2fsm.state_count = L2_STATE_COUNT; | |
1836 | l2fsm.event_count = L2_EVENT_COUNT; | |
1837 | l2fsm.strEvent = strL2Event; | |
1838 | l2fsm.strState = strL2State; | |
1839 | return FsmNew(&l2fsm, L2FnList, L2_FN_COUNT); | |
1840 | } | |
1841 | ||
1842 | void | |
1843 | Isdnl2Free(void) | |
1844 | { | |
1845 | FsmFree(&l2fsm); | |
1846 | } |