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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); | |
111 | if (skb_queue_len(&l2->i_queue) || skb_queue_len(&l2->ui_queue)) | |
112 | test_and_set_bit(FLG_L2BLOCK, &l2->flag); | |
113 | } | |
114 | ||
115 | static void | |
116 | clear_peer_busy(struct Layer2 *l2) { | |
117 | if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag)) | |
118 | test_and_clear_bit(FLG_L2BLOCK, &l2->flag); | |
119 | } | |
120 | ||
121 | static void | |
122 | InitWin(struct Layer2 *l2) | |
123 | { | |
124 | int i; | |
125 | ||
126 | for (i = 0; i < MAX_WINDOW; i++) | |
127 | l2->windowar[i] = NULL; | |
128 | } | |
129 | ||
130 | static int | |
131 | freewin1(struct Layer2 *l2) | |
132 | { | |
133 | int i, cnt = 0; | |
134 | ||
135 | for (i = 0; i < MAX_WINDOW; i++) { | |
136 | if (l2->windowar[i]) { | |
137 | cnt++; | |
138 | dev_kfree_skb(l2->windowar[i]); | |
139 | l2->windowar[i] = NULL; | |
140 | } | |
141 | } | |
142 | return cnt; | |
143 | } | |
144 | ||
672c3fd9 | 145 | static inline void |
1da177e4 LT |
146 | freewin(struct PStack *st) |
147 | { | |
148 | freewin1(&st->l2); | |
149 | } | |
150 | ||
151 | static void | |
152 | ReleaseWin(struct Layer2 *l2) | |
153 | { | |
154 | int cnt; | |
155 | ||
156 | if((cnt = freewin1(l2))) | |
157 | printk(KERN_WARNING "isdl2 freed %d skbuffs in release\n", cnt); | |
158 | } | |
159 | ||
672c3fd9 | 160 | static inline unsigned int |
1da177e4 LT |
161 | cansend(struct PStack *st) |
162 | { | |
163 | unsigned int p1; | |
164 | ||
165 | if(test_bit(FLG_MOD128, &st->l2.flag)) | |
166 | p1 = (st->l2.vs - st->l2.va) % 128; | |
167 | else | |
168 | p1 = (st->l2.vs - st->l2.va) % 8; | |
169 | return ((p1 < st->l2.window) && !test_bit(FLG_PEER_BUSY, &st->l2.flag)); | |
170 | } | |
171 | ||
672c3fd9 | 172 | static inline void |
1da177e4 LT |
173 | clear_exception(struct Layer2 *l2) |
174 | { | |
175 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
176 | test_and_clear_bit(FLG_REJEXC, &l2->flag); | |
177 | test_and_clear_bit(FLG_OWN_BUSY, &l2->flag); | |
178 | clear_peer_busy(l2); | |
179 | } | |
180 | ||
672c3fd9 | 181 | static inline int |
1da177e4 LT |
182 | l2headersize(struct Layer2 *l2, int ui) |
183 | { | |
184 | return (((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) + | |
185 | (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1)); | |
186 | } | |
187 | ||
188 | inline int | |
189 | l2addrsize(struct Layer2 *l2) | |
190 | { | |
191 | return (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1); | |
192 | } | |
193 | ||
194 | static int | |
195 | sethdraddr(struct Layer2 *l2, u_char * header, int rsp) | |
196 | { | |
197 | u_char *ptr = header; | |
198 | int crbit = rsp; | |
199 | ||
200 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
201 | *ptr++ = (l2->sap << 2) | (rsp ? 2 : 0); | |
202 | *ptr++ = (l2->tei << 1) | 1; | |
203 | return (2); | |
204 | } else { | |
205 | if (test_bit(FLG_ORIG, &l2->flag)) | |
206 | crbit = !crbit; | |
207 | if (crbit) | |
208 | *ptr++ = 1; | |
209 | else | |
210 | *ptr++ = 3; | |
211 | return (1); | |
212 | } | |
213 | } | |
214 | ||
215 | inline static void | |
216 | enqueue_super(struct PStack *st, | |
217 | struct sk_buff *skb) | |
218 | { | |
219 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
220 | st->l1.bcs->tx_cnt += skb->len; | |
221 | st->l2.l2l1(st, PH_DATA | REQUEST, skb); | |
222 | } | |
223 | ||
224 | #define enqueue_ui(a, b) enqueue_super(a, b) | |
225 | ||
672c3fd9 | 226 | static inline int |
1da177e4 LT |
227 | IsUI(u_char * data) |
228 | { | |
229 | return ((data[0] & 0xef) == UI); | |
230 | } | |
231 | ||
672c3fd9 | 232 | static inline int |
1da177e4 LT |
233 | IsUA(u_char * data) |
234 | { | |
235 | return ((data[0] & 0xef) == UA); | |
236 | } | |
237 | ||
672c3fd9 | 238 | static inline int |
1da177e4 LT |
239 | IsDM(u_char * data) |
240 | { | |
241 | return ((data[0] & 0xef) == DM); | |
242 | } | |
243 | ||
672c3fd9 | 244 | static inline int |
1da177e4 LT |
245 | IsDISC(u_char * data) |
246 | { | |
247 | return ((data[0] & 0xef) == DISC); | |
248 | } | |
249 | ||
672c3fd9 | 250 | static inline int |
1da177e4 LT |
251 | IsSFrame(u_char * data, struct PStack *st) |
252 | { | |
253 | register u_char d = *data; | |
254 | ||
255 | if (!test_bit(FLG_MOD128, &st->l2.flag)) | |
256 | d &= 0xf; | |
257 | return(((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c)); | |
258 | } | |
259 | ||
672c3fd9 | 260 | static inline int |
1da177e4 LT |
261 | IsSABME(u_char * data, struct PStack *st) |
262 | { | |
263 | u_char d = data[0] & ~0x10; | |
264 | ||
265 | return (test_bit(FLG_MOD128, &st->l2.flag) ? d == SABME : d == SABM); | |
266 | } | |
267 | ||
672c3fd9 | 268 | static inline int |
1da177e4 LT |
269 | IsREJ(u_char * data, struct PStack *st) |
270 | { | |
271 | return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == REJ : (data[0] & 0xf) == REJ); | |
272 | } | |
273 | ||
672c3fd9 | 274 | static inline int |
1da177e4 LT |
275 | IsFRMR(u_char * data) |
276 | { | |
277 | return ((data[0] & 0xef) == FRMR); | |
278 | } | |
279 | ||
672c3fd9 | 280 | static inline int |
1da177e4 LT |
281 | IsRNR(u_char * data, struct PStack *st) |
282 | { | |
283 | return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == RNR : (data[0] & 0xf) == RNR); | |
284 | } | |
285 | ||
672c3fd9 | 286 | static int |
1da177e4 LT |
287 | iframe_error(struct PStack *st, struct sk_buff *skb) |
288 | { | |
289 | int i = l2addrsize(&st->l2) + (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1); | |
290 | int rsp = *skb->data & 0x2; | |
291 | ||
292 | if (test_bit(FLG_ORIG, &st->l2.flag)) | |
293 | rsp = !rsp; | |
294 | ||
295 | if (rsp) | |
296 | return 'L'; | |
297 | ||
298 | ||
299 | if (skb->len < i) | |
300 | return 'N'; | |
301 | ||
302 | if ((skb->len - i) > st->l2.maxlen) | |
303 | return 'O'; | |
304 | ||
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
672c3fd9 | 309 | static int |
1da177e4 LT |
310 | super_error(struct PStack *st, struct sk_buff *skb) |
311 | { | |
312 | if (skb->len != l2addrsize(&st->l2) + | |
313 | (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1)) | |
314 | return 'N'; | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
672c3fd9 | 319 | static int |
1da177e4 LT |
320 | unnum_error(struct PStack *st, struct sk_buff *skb, int wantrsp) |
321 | { | |
322 | int rsp = (*skb->data & 0x2) >> 1; | |
323 | if (test_bit(FLG_ORIG, &st->l2.flag)) | |
324 | rsp = !rsp; | |
325 | ||
326 | if (rsp != wantrsp) | |
327 | return 'L'; | |
328 | ||
329 | if (skb->len != l2addrsize(&st->l2) + 1) | |
330 | return 'N'; | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
672c3fd9 | 335 | static int |
1da177e4 LT |
336 | UI_error(struct PStack *st, struct sk_buff *skb) |
337 | { | |
338 | int rsp = *skb->data & 0x2; | |
339 | if (test_bit(FLG_ORIG, &st->l2.flag)) | |
340 | rsp = !rsp; | |
341 | ||
342 | if (rsp) | |
343 | return 'L'; | |
344 | ||
345 | if (skb->len > st->l2.maxlen + l2addrsize(&st->l2) + 1) | |
346 | return 'O'; | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
672c3fd9 | 351 | static int |
1da177e4 LT |
352 | FRMR_error(struct PStack *st, struct sk_buff *skb) |
353 | { | |
354 | int headers = l2addrsize(&st->l2) + 1; | |
355 | u_char *datap = skb->data + headers; | |
356 | int rsp = *skb->data & 0x2; | |
357 | ||
358 | if (test_bit(FLG_ORIG, &st->l2.flag)) | |
359 | rsp = !rsp; | |
360 | ||
361 | if (!rsp) | |
362 | return 'L'; | |
363 | ||
364 | if (test_bit(FLG_MOD128, &st->l2.flag)) { | |
365 | if (skb->len < headers + 5) | |
366 | return 'N'; | |
367 | else | |
368 | l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x %2x %2x", | |
369 | datap[0], datap[1], datap[2], | |
370 | datap[3], datap[4]); | |
371 | } else { | |
372 | if (skb->len < headers + 3) | |
373 | return 'N'; | |
374 | else | |
375 | l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x", | |
376 | datap[0], datap[1], datap[2]); | |
377 | } | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
382 | static unsigned int | |
383 | legalnr(struct PStack *st, unsigned int nr) | |
384 | { | |
385 | struct Layer2 *l2 = &st->l2; | |
386 | ||
387 | if(test_bit(FLG_MOD128, &l2->flag)) | |
388 | return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128); | |
389 | else | |
390 | return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8); | |
391 | } | |
392 | ||
393 | static void | |
394 | setva(struct PStack *st, unsigned int nr) | |
395 | { | |
396 | struct Layer2 *l2 = &st->l2; | |
397 | int len; | |
398 | u_long flags; | |
399 | ||
400 | spin_lock_irqsave(&l2->lock, flags); | |
401 | while (l2->va != nr) { | |
402 | (l2->va)++; | |
403 | if(test_bit(FLG_MOD128, &l2->flag)) | |
404 | l2->va %= 128; | |
405 | else | |
406 | l2->va %= 8; | |
407 | len = l2->windowar[l2->sow]->len; | |
408 | if (PACKET_NOACK == l2->windowar[l2->sow]->pkt_type) | |
409 | len = -1; | |
410 | dev_kfree_skb(l2->windowar[l2->sow]); | |
411 | l2->windowar[l2->sow] = NULL; | |
412 | l2->sow = (l2->sow + 1) % l2->window; | |
413 | spin_unlock_irqrestore(&l2->lock, flags); | |
414 | if (test_bit(FLG_LLI_L2WAKEUP, &st->lli.flag) && (len >=0)) | |
415 | lli_writewakeup(st, len); | |
416 | spin_lock_irqsave(&l2->lock, flags); | |
417 | } | |
418 | spin_unlock_irqrestore(&l2->lock, flags); | |
419 | } | |
420 | ||
421 | static void | |
422 | send_uframe(struct PStack *st, u_char cmd, u_char cr) | |
423 | { | |
424 | struct sk_buff *skb; | |
425 | u_char tmp[MAX_HEADER_LEN]; | |
426 | int i; | |
427 | ||
428 | i = sethdraddr(&st->l2, tmp, cr); | |
429 | tmp[i++] = cmd; | |
430 | if (!(skb = alloc_skb(i, GFP_ATOMIC))) { | |
431 | printk(KERN_WARNING "isdl2 can't alloc sbbuff for send_uframe\n"); | |
432 | return; | |
433 | } | |
434 | memcpy(skb_put(skb, i), tmp, i); | |
435 | enqueue_super(st, skb); | |
436 | } | |
437 | ||
672c3fd9 | 438 | static inline u_char |
1da177e4 LT |
439 | get_PollFlag(struct PStack * st, struct sk_buff * skb) |
440 | { | |
441 | return (skb->data[l2addrsize(&(st->l2))] & 0x10); | |
442 | } | |
443 | ||
672c3fd9 | 444 | static inline u_char |
1da177e4 LT |
445 | get_PollFlagFree(struct PStack *st, struct sk_buff *skb) |
446 | { | |
447 | u_char PF; | |
448 | ||
449 | PF = get_PollFlag(st, skb); | |
672c3fd9 | 450 | dev_kfree_skb(skb); |
1da177e4 LT |
451 | return (PF); |
452 | } | |
453 | ||
672c3fd9 | 454 | static inline void |
1da177e4 LT |
455 | start_t200(struct PStack *st, int i) |
456 | { | |
457 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i); | |
458 | test_and_set_bit(FLG_T200_RUN, &st->l2.flag); | |
459 | } | |
460 | ||
672c3fd9 | 461 | static inline void |
1da177e4 LT |
462 | restart_t200(struct PStack *st, int i) |
463 | { | |
464 | FsmRestartTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i); | |
465 | test_and_set_bit(FLG_T200_RUN, &st->l2.flag); | |
466 | } | |
467 | ||
672c3fd9 | 468 | static inline void |
1da177e4 LT |
469 | stop_t200(struct PStack *st, int i) |
470 | { | |
471 | if(test_and_clear_bit(FLG_T200_RUN, &st->l2.flag)) | |
472 | FsmDelTimer(&st->l2.t200, i); | |
473 | } | |
474 | ||
672c3fd9 | 475 | static inline void |
1da177e4 LT |
476 | st5_dl_release_l2l3(struct PStack *st) |
477 | { | |
478 | int pr; | |
479 | ||
480 | if(test_and_clear_bit(FLG_PEND_REL, &st->l2.flag)) | |
481 | pr = DL_RELEASE | CONFIRM; | |
482 | else | |
483 | pr = DL_RELEASE | INDICATION; | |
484 | ||
485 | st->l2.l2l3(st, pr, NULL); | |
486 | } | |
487 | ||
672c3fd9 | 488 | static inline void |
1da177e4 LT |
489 | lapb_dl_release_l2l3(struct PStack *st, int f) |
490 | { | |
491 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
492 | st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL); | |
493 | st->l2.l2l3(st, DL_RELEASE | f, NULL); | |
494 | } | |
495 | ||
496 | static void | |
497 | establishlink(struct FsmInst *fi) | |
498 | { | |
499 | struct PStack *st = fi->userdata; | |
500 | u_char cmd; | |
501 | ||
502 | clear_exception(&st->l2); | |
503 | st->l2.rc = 0; | |
504 | cmd = (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM) | 0x10; | |
505 | send_uframe(st, cmd, CMD); | |
506 | FsmDelTimer(&st->l2.t203, 1); | |
507 | restart_t200(st, 1); | |
508 | test_and_clear_bit(FLG_PEND_REL, &st->l2.flag); | |
509 | freewin(st); | |
510 | FsmChangeState(fi, ST_L2_5); | |
511 | } | |
512 | ||
513 | static void | |
514 | l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg) | |
515 | { | |
516 | struct sk_buff *skb = arg; | |
517 | struct PStack *st = fi->userdata; | |
518 | ||
519 | if (get_PollFlagFree(st, skb)) | |
520 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'C'); | |
521 | else | |
522 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'D'); | |
523 | } | |
524 | ||
525 | static void | |
526 | l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg) | |
527 | { | |
528 | struct sk_buff *skb = arg; | |
529 | struct PStack *st = fi->userdata; | |
530 | ||
531 | if (get_PollFlagFree(st, skb)) | |
532 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B'); | |
533 | else { | |
534 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E'); | |
535 | establishlink(fi); | |
536 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); | |
537 | } | |
538 | } | |
539 | ||
540 | static void | |
541 | l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg) | |
542 | { | |
543 | struct sk_buff *skb = arg; | |
544 | struct PStack *st = fi->userdata; | |
545 | ||
546 | if (get_PollFlagFree(st, skb)) | |
547 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B'); | |
548 | else { | |
549 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E'); | |
550 | } | |
551 | establishlink(fi); | |
552 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); | |
553 | } | |
554 | ||
555 | static void | |
556 | l2_go_st3(struct FsmInst *fi, int event, void *arg) | |
557 | { | |
558 | FsmChangeState(fi, ST_L2_3); | |
559 | } | |
560 | ||
561 | static void | |
562 | l2_mdl_assign(struct FsmInst *fi, int event, void *arg) | |
563 | { | |
564 | struct PStack *st = fi->userdata; | |
565 | ||
566 | FsmChangeState(fi, ST_L2_3); | |
567 | st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL); | |
568 | } | |
569 | ||
570 | static void | |
571 | l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg) | |
572 | { | |
573 | struct PStack *st = fi->userdata; | |
574 | struct sk_buff *skb = arg; | |
575 | ||
576 | skb_queue_tail(&st->l2.ui_queue, skb); | |
577 | FsmChangeState(fi, ST_L2_2); | |
578 | st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL); | |
579 | } | |
580 | ||
581 | static void | |
582 | l2_queue_ui(struct FsmInst *fi, int event, void *arg) | |
583 | { | |
584 | struct PStack *st = fi->userdata; | |
585 | struct sk_buff *skb = arg; | |
586 | ||
587 | skb_queue_tail(&st->l2.ui_queue, skb); | |
588 | } | |
589 | ||
590 | static void | |
591 | tx_ui(struct PStack *st) | |
592 | { | |
593 | struct sk_buff *skb; | |
594 | u_char header[MAX_HEADER_LEN]; | |
595 | int i; | |
596 | ||
597 | i = sethdraddr(&(st->l2), header, CMD); | |
598 | header[i++] = UI; | |
599 | while ((skb = skb_dequeue(&st->l2.ui_queue))) { | |
600 | memcpy(skb_push(skb, i), header, i); | |
601 | enqueue_ui(st, skb); | |
602 | } | |
603 | } | |
604 | ||
605 | static void | |
606 | l2_send_ui(struct FsmInst *fi, int event, void *arg) | |
607 | { | |
608 | struct PStack *st = fi->userdata; | |
609 | struct sk_buff *skb = arg; | |
610 | ||
611 | skb_queue_tail(&st->l2.ui_queue, skb); | |
612 | tx_ui(st); | |
613 | } | |
614 | ||
615 | static void | |
616 | l2_got_ui(struct FsmInst *fi, int event, void *arg) | |
617 | { | |
618 | struct PStack *st = fi->userdata; | |
619 | struct sk_buff *skb = arg; | |
620 | ||
621 | skb_pull(skb, l2headersize(&st->l2, 1)); | |
622 | st->l2.l2l3(st, DL_UNIT_DATA | INDICATION, skb); | |
623 | /* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
624 | * in states 1-3 for broadcast | |
625 | */ | |
626 | ||
627 | ||
628 | } | |
629 | ||
630 | static void | |
631 | l2_establish(struct FsmInst *fi, int event, void *arg) | |
632 | { | |
633 | struct PStack *st = fi->userdata; | |
634 | ||
635 | establishlink(fi); | |
636 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); | |
637 | } | |
638 | ||
639 | static void | |
640 | l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg) | |
641 | { | |
642 | struct PStack *st = fi->userdata; | |
643 | ||
644 | skb_queue_purge(&st->l2.i_queue); | |
645 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); | |
646 | test_and_clear_bit(FLG_PEND_REL, &st->l2.flag); | |
647 | } | |
648 | ||
649 | static void | |
650 | l2_l3_reestablish(struct FsmInst *fi, int event, void *arg) | |
651 | { | |
652 | struct PStack *st = fi->userdata; | |
653 | ||
654 | skb_queue_purge(&st->l2.i_queue); | |
655 | establishlink(fi); | |
656 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); | |
657 | } | |
658 | ||
659 | static void | |
660 | l2_release(struct FsmInst *fi, int event, void *arg) | |
661 | { | |
662 | struct PStack *st = fi->userdata; | |
663 | ||
664 | st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL); | |
665 | } | |
666 | ||
667 | static void | |
668 | l2_pend_rel(struct FsmInst *fi, int event, void *arg) | |
669 | { | |
670 | struct PStack *st = fi->userdata; | |
671 | ||
672 | test_and_set_bit(FLG_PEND_REL, &st->l2.flag); | |
673 | } | |
674 | ||
675 | static void | |
676 | l2_disconnect(struct FsmInst *fi, int event, void *arg) | |
677 | { | |
678 | struct PStack *st = fi->userdata; | |
679 | ||
680 | skb_queue_purge(&st->l2.i_queue); | |
681 | freewin(st); | |
682 | FsmChangeState(fi, ST_L2_6); | |
683 | st->l2.rc = 0; | |
684 | send_uframe(st, DISC | 0x10, CMD); | |
685 | FsmDelTimer(&st->l2.t203, 1); | |
686 | restart_t200(st, 2); | |
687 | } | |
688 | ||
689 | static void | |
690 | l2_start_multi(struct FsmInst *fi, int event, void *arg) | |
691 | { | |
692 | struct PStack *st = fi->userdata; | |
693 | struct sk_buff *skb = arg; | |
694 | ||
695 | send_uframe(st, UA | get_PollFlagFree(st, skb), RSP); | |
696 | ||
697 | clear_exception(&st->l2); | |
698 | st->l2.vs = 0; | |
699 | st->l2.va = 0; | |
700 | st->l2.vr = 0; | |
701 | st->l2.sow = 0; | |
702 | FsmChangeState(fi, ST_L2_7); | |
703 | FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3); | |
704 | ||
705 | st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL); | |
706 | } | |
707 | ||
708 | static void | |
709 | l2_send_UA(struct FsmInst *fi, int event, void *arg) | |
710 | { | |
711 | struct PStack *st = fi->userdata; | |
712 | struct sk_buff *skb = arg; | |
713 | ||
714 | send_uframe(st, UA | get_PollFlagFree(st, skb), RSP); | |
715 | } | |
716 | ||
717 | static void | |
718 | l2_send_DM(struct FsmInst *fi, int event, void *arg) | |
719 | { | |
720 | struct PStack *st = fi->userdata; | |
721 | struct sk_buff *skb = arg; | |
722 | ||
723 | send_uframe(st, DM | get_PollFlagFree(st, skb), RSP); | |
724 | } | |
725 | ||
726 | static void | |
727 | l2_restart_multi(struct FsmInst *fi, int event, void *arg) | |
728 | { | |
729 | struct PStack *st = fi->userdata; | |
730 | struct sk_buff *skb = arg; | |
731 | int est = 0, state; | |
732 | ||
733 | state = fi->state; | |
734 | ||
735 | send_uframe(st, UA | get_PollFlagFree(st, skb), RSP); | |
736 | ||
737 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'F'); | |
738 | ||
739 | if (st->l2.vs != st->l2.va) { | |
740 | skb_queue_purge(&st->l2.i_queue); | |
741 | est = 1; | |
742 | } | |
743 | ||
744 | clear_exception(&st->l2); | |
745 | st->l2.vs = 0; | |
746 | st->l2.va = 0; | |
747 | st->l2.vr = 0; | |
748 | st->l2.sow = 0; | |
749 | FsmChangeState(fi, ST_L2_7); | |
750 | stop_t200(st, 3); | |
751 | FsmRestartTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3); | |
752 | ||
753 | if (est) | |
754 | st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL); | |
755 | ||
756 | if ((ST_L2_7==state) || (ST_L2_8 == state)) | |
757 | if (skb_queue_len(&st->l2.i_queue) && cansend(st)) | |
758 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); | |
759 | } | |
760 | ||
761 | static void | |
762 | l2_stop_multi(struct FsmInst *fi, int event, void *arg) | |
763 | { | |
764 | struct PStack *st = fi->userdata; | |
765 | struct sk_buff *skb = arg; | |
766 | ||
767 | FsmChangeState(fi, ST_L2_4); | |
768 | FsmDelTimer(&st->l2.t203, 3); | |
769 | stop_t200(st, 4); | |
770 | ||
771 | send_uframe(st, UA | get_PollFlagFree(st, skb), RSP); | |
772 | ||
773 | skb_queue_purge(&st->l2.i_queue); | |
774 | freewin(st); | |
775 | lapb_dl_release_l2l3(st, INDICATION); | |
776 | } | |
777 | ||
778 | static void | |
779 | l2_connected(struct FsmInst *fi, int event, void *arg) | |
780 | { | |
781 | struct PStack *st = fi->userdata; | |
782 | struct sk_buff *skb = arg; | |
783 | int pr=-1; | |
784 | ||
785 | if (!get_PollFlag(st, skb)) { | |
786 | l2_mdl_error_ua(fi, event, arg); | |
787 | return; | |
788 | } | |
672c3fd9 | 789 | dev_kfree_skb(skb); |
1da177e4 LT |
790 | |
791 | if (test_and_clear_bit(FLG_PEND_REL, &st->l2.flag)) | |
792 | l2_disconnect(fi, event, arg); | |
793 | ||
794 | if (test_and_clear_bit(FLG_L3_INIT, &st->l2.flag)) { | |
795 | pr = DL_ESTABLISH | CONFIRM; | |
796 | } else if (st->l2.vs != st->l2.va) { | |
797 | skb_queue_purge(&st->l2.i_queue); | |
798 | pr = DL_ESTABLISH | INDICATION; | |
799 | } | |
800 | ||
801 | stop_t200(st, 5); | |
802 | ||
803 | st->l2.vr = 0; | |
804 | st->l2.vs = 0; | |
805 | st->l2.va = 0; | |
806 | st->l2.sow = 0; | |
807 | FsmChangeState(fi, ST_L2_7); | |
808 | FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 4); | |
809 | ||
810 | if (pr != -1) | |
811 | st->l2.l2l3(st, pr, NULL); | |
812 | ||
813 | if (skb_queue_len(&st->l2.i_queue) && cansend(st)) | |
814 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); | |
815 | } | |
816 | ||
817 | static void | |
818 | l2_released(struct FsmInst *fi, int event, void *arg) | |
819 | { | |
820 | struct PStack *st = fi->userdata; | |
821 | struct sk_buff *skb = arg; | |
822 | ||
823 | if (!get_PollFlag(st, skb)) { | |
824 | l2_mdl_error_ua(fi, event, arg); | |
825 | return; | |
826 | } | |
672c3fd9 | 827 | dev_kfree_skb(skb); |
1da177e4 LT |
828 | |
829 | stop_t200(st, 6); | |
830 | lapb_dl_release_l2l3(st, CONFIRM); | |
831 | FsmChangeState(fi, ST_L2_4); | |
832 | } | |
833 | ||
834 | static void | |
835 | l2_reestablish(struct FsmInst *fi, int event, void *arg) | |
836 | { | |
837 | struct PStack *st = fi->userdata; | |
838 | struct sk_buff *skb = arg; | |
839 | ||
840 | if (!get_PollFlagFree(st, skb)) { | |
841 | establishlink(fi); | |
842 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); | |
843 | } | |
844 | } | |
845 | ||
846 | static void | |
847 | l2_st5_dm_release(struct FsmInst *fi, int event, void *arg) | |
848 | { | |
849 | struct PStack *st = fi->userdata; | |
850 | struct sk_buff *skb = arg; | |
851 | ||
852 | if (get_PollFlagFree(st, skb)) { | |
853 | stop_t200(st, 7); | |
854 | if (!test_bit(FLG_L3_INIT, &st->l2.flag)) | |
855 | skb_queue_purge(&st->l2.i_queue); | |
856 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
857 | st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL); | |
858 | st5_dl_release_l2l3(st); | |
859 | FsmChangeState(fi, ST_L2_4); | |
860 | } | |
861 | } | |
862 | ||
863 | static void | |
864 | l2_st6_dm_release(struct FsmInst *fi, int event, void *arg) | |
865 | { | |
866 | struct PStack *st = fi->userdata; | |
867 | struct sk_buff *skb = arg; | |
868 | ||
869 | if (get_PollFlagFree(st, skb)) { | |
870 | stop_t200(st, 8); | |
871 | lapb_dl_release_l2l3(st, CONFIRM); | |
872 | FsmChangeState(fi, ST_L2_4); | |
873 | } | |
874 | } | |
875 | ||
672c3fd9 | 876 | static inline void |
1da177e4 LT |
877 | enquiry_cr(struct PStack *st, u_char typ, u_char cr, u_char pf) |
878 | { | |
879 | struct sk_buff *skb; | |
880 | struct Layer2 *l2; | |
881 | u_char tmp[MAX_HEADER_LEN]; | |
882 | int i; | |
883 | ||
884 | l2 = &st->l2; | |
885 | i = sethdraddr(l2, tmp, cr); | |
886 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
887 | tmp[i++] = typ; | |
888 | tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0); | |
889 | } else | |
890 | tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0); | |
891 | if (!(skb = alloc_skb(i, GFP_ATOMIC))) { | |
892 | printk(KERN_WARNING "isdl2 can't alloc sbbuff for enquiry_cr\n"); | |
893 | return; | |
894 | } | |
895 | memcpy(skb_put(skb, i), tmp, i); | |
896 | enqueue_super(st, skb); | |
897 | } | |
898 | ||
672c3fd9 | 899 | static inline void |
1da177e4 LT |
900 | enquiry_response(struct PStack *st) |
901 | { | |
902 | if (test_bit(FLG_OWN_BUSY, &st->l2.flag)) | |
903 | enquiry_cr(st, RNR, RSP, 1); | |
904 | else | |
905 | enquiry_cr(st, RR, RSP, 1); | |
906 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); | |
907 | } | |
908 | ||
672c3fd9 | 909 | static inline void |
1da177e4 LT |
910 | transmit_enquiry(struct PStack *st) |
911 | { | |
912 | if (test_bit(FLG_OWN_BUSY, &st->l2.flag)) | |
913 | enquiry_cr(st, RNR, CMD, 1); | |
914 | else | |
915 | enquiry_cr(st, RR, CMD, 1); | |
916 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); | |
917 | start_t200(st, 9); | |
918 | } | |
919 | ||
920 | ||
921 | static void | |
922 | nrerrorrecovery(struct FsmInst *fi) | |
923 | { | |
924 | struct PStack *st = fi->userdata; | |
925 | ||
926 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'J'); | |
927 | establishlink(fi); | |
928 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); | |
929 | } | |
930 | ||
931 | static void | |
932 | invoke_retransmission(struct PStack *st, unsigned int nr) | |
933 | { | |
934 | struct Layer2 *l2 = &st->l2; | |
935 | u_int p1; | |
936 | u_long flags; | |
937 | ||
938 | spin_lock_irqsave(&l2->lock, flags); | |
939 | if (l2->vs != nr) { | |
940 | while (l2->vs != nr) { | |
941 | (l2->vs)--; | |
942 | if(test_bit(FLG_MOD128, &l2->flag)) { | |
943 | l2->vs %= 128; | |
944 | p1 = (l2->vs - l2->va) % 128; | |
945 | } else { | |
946 | l2->vs %= 8; | |
947 | p1 = (l2->vs - l2->va) % 8; | |
948 | } | |
949 | p1 = (p1 + l2->sow) % l2->window; | |
950 | if (test_bit(FLG_LAPB, &l2->flag)) | |
951 | st->l1.bcs->tx_cnt += l2->windowar[p1]->len + l2headersize(l2, 0); | |
952 | skb_queue_head(&l2->i_queue, l2->windowar[p1]); | |
953 | l2->windowar[p1] = NULL; | |
954 | } | |
955 | spin_unlock_irqrestore(&l2->lock, flags); | |
956 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); | |
957 | return; | |
958 | } | |
959 | spin_unlock_irqrestore(&l2->lock, flags); | |
960 | } | |
961 | ||
962 | static void | |
963 | l2_st7_got_super(struct FsmInst *fi, int event, void *arg) | |
964 | { | |
965 | struct PStack *st = fi->userdata; | |
966 | struct sk_buff *skb = arg; | |
967 | int PollFlag, rsp, typ = RR; | |
968 | unsigned int nr; | |
969 | struct Layer2 *l2 = &st->l2; | |
970 | ||
971 | rsp = *skb->data & 0x2; | |
972 | if (test_bit(FLG_ORIG, &l2->flag)) | |
973 | rsp = !rsp; | |
974 | ||
975 | skb_pull(skb, l2addrsize(l2)); | |
976 | if (IsRNR(skb->data, st)) { | |
977 | set_peer_busy(l2); | |
978 | typ = RNR; | |
979 | } else | |
980 | clear_peer_busy(l2); | |
981 | if (IsREJ(skb->data, st)) | |
982 | typ = REJ; | |
983 | ||
984 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
985 | PollFlag = (skb->data[1] & 0x1) == 0x1; | |
986 | nr = skb->data[1] >> 1; | |
987 | } else { | |
988 | PollFlag = (skb->data[0] & 0x10); | |
989 | nr = (skb->data[0] >> 5) & 0x7; | |
990 | } | |
672c3fd9 | 991 | dev_kfree_skb(skb); |
1da177e4 LT |
992 | |
993 | if (PollFlag) { | |
994 | if (rsp) | |
995 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'A'); | |
996 | else | |
997 | enquiry_response(st); | |
998 | } | |
999 | if (legalnr(st, nr)) { | |
1000 | if (typ == REJ) { | |
1001 | setva(st, nr); | |
1002 | invoke_retransmission(st, nr); | |
1003 | stop_t200(st, 10); | |
1004 | if (FsmAddTimer(&st->l2.t203, st->l2.T203, | |
1005 | EV_L2_T203, NULL, 6)) | |
1006 | l2m_debug(&st->l2.l2m, "Restart T203 ST7 REJ"); | |
1007 | } else if ((nr == l2->vs) && (typ == RR)) { | |
1008 | setva(st, nr); | |
1009 | stop_t200(st, 11); | |
1010 | FsmRestartTimer(&st->l2.t203, st->l2.T203, | |
1011 | EV_L2_T203, NULL, 7); | |
1012 | } else if ((l2->va != nr) || (typ == RNR)) { | |
1013 | setva(st, nr); | |
1014 | if(typ != RR) FsmDelTimer(&st->l2.t203, 9); | |
1015 | restart_t200(st, 12); | |
1016 | } | |
1017 | if (skb_queue_len(&st->l2.i_queue) && (typ == RR)) | |
1018 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); | |
1019 | } else | |
1020 | nrerrorrecovery(fi); | |
1021 | } | |
1022 | ||
1023 | static void | |
1024 | l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg) | |
1025 | { | |
1026 | struct PStack *st = fi->userdata; | |
1027 | struct sk_buff *skb = arg; | |
1028 | ||
1029 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
1030 | st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0); | |
1031 | if (!test_bit(FLG_L3_INIT, &st->l2.flag)) | |
1032 | skb_queue_tail(&st->l2.i_queue, skb); | |
1033 | else | |
672c3fd9 | 1034 | dev_kfree_skb(skb); |
1da177e4 LT |
1035 | } |
1036 | ||
1037 | static void | |
1038 | l2_feed_i_pull(struct FsmInst *fi, int event, void *arg) | |
1039 | { | |
1040 | struct PStack *st = fi->userdata; | |
1041 | struct sk_buff *skb = arg; | |
1042 | ||
1043 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
1044 | st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0); | |
1045 | skb_queue_tail(&st->l2.i_queue, skb); | |
1046 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); | |
1047 | } | |
1048 | ||
1049 | static void | |
1050 | l2_feed_iqueue(struct FsmInst *fi, int event, void *arg) | |
1051 | { | |
1052 | struct PStack *st = fi->userdata; | |
1053 | struct sk_buff *skb = arg; | |
1054 | ||
1055 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
1056 | st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0); | |
1057 | skb_queue_tail(&st->l2.i_queue, skb); | |
1058 | } | |
1059 | ||
1060 | static void | |
1061 | l2_got_iframe(struct FsmInst *fi, int event, void *arg) | |
1062 | { | |
1063 | struct PStack *st = fi->userdata; | |
1064 | struct sk_buff *skb = arg; | |
1065 | struct Layer2 *l2 = &(st->l2); | |
1066 | int PollFlag, ns, i; | |
1067 | unsigned int nr; | |
1068 | ||
1069 | i = l2addrsize(l2); | |
1070 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1071 | PollFlag = ((skb->data[i + 1] & 0x1) == 0x1); | |
1072 | ns = skb->data[i] >> 1; | |
1073 | nr = (skb->data[i + 1] >> 1) & 0x7f; | |
1074 | } else { | |
1075 | PollFlag = (skb->data[i] & 0x10); | |
1076 | ns = (skb->data[i] >> 1) & 0x7; | |
1077 | nr = (skb->data[i] >> 5) & 0x7; | |
1078 | } | |
1079 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) { | |
672c3fd9 | 1080 | dev_kfree_skb(skb); |
1da177e4 LT |
1081 | if(PollFlag) enquiry_response(st); |
1082 | } else if (l2->vr == ns) { | |
1083 | (l2->vr)++; | |
1084 | if(test_bit(FLG_MOD128, &l2->flag)) | |
1085 | l2->vr %= 128; | |
1086 | else | |
1087 | l2->vr %= 8; | |
1088 | test_and_clear_bit(FLG_REJEXC, &l2->flag); | |
1089 | ||
1090 | if (PollFlag) | |
1091 | enquiry_response(st); | |
1092 | else | |
1093 | test_and_set_bit(FLG_ACK_PEND, &l2->flag); | |
1094 | skb_pull(skb, l2headersize(l2, 0)); | |
1095 | st->l2.l2l3(st, DL_DATA | INDICATION, skb); | |
1096 | } else { | |
1097 | /* n(s)!=v(r) */ | |
672c3fd9 | 1098 | dev_kfree_skb(skb); |
1da177e4 LT |
1099 | if (test_and_set_bit(FLG_REJEXC, &l2->flag)) { |
1100 | if (PollFlag) | |
1101 | enquiry_response(st); | |
1102 | } else { | |
1103 | enquiry_cr(st, REJ, RSP, PollFlag); | |
1104 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | if (legalnr(st, nr)) { | |
1109 | if (!test_bit(FLG_PEER_BUSY, &st->l2.flag) && (fi->state == ST_L2_7)) { | |
1110 | if (nr == st->l2.vs) { | |
1111 | stop_t200(st, 13); | |
1112 | FsmRestartTimer(&st->l2.t203, st->l2.T203, | |
1113 | EV_L2_T203, NULL, 7); | |
1114 | } else if (nr != st->l2.va) | |
1115 | restart_t200(st, 14); | |
1116 | } | |
1117 | setva(st, nr); | |
1118 | } else { | |
1119 | nrerrorrecovery(fi); | |
1120 | return; | |
1121 | } | |
1122 | ||
1123 | if (skb_queue_len(&st->l2.i_queue) && (fi->state == ST_L2_7)) | |
1124 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); | |
1125 | if (test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag)) | |
1126 | enquiry_cr(st, RR, RSP, 0); | |
1127 | } | |
1128 | ||
1129 | static void | |
1130 | l2_got_tei(struct FsmInst *fi, int event, void *arg) | |
1131 | { | |
1132 | struct PStack *st = fi->userdata; | |
1133 | ||
1134 | st->l2.tei = (long) arg; | |
1135 | ||
1136 | if (fi->state == ST_L2_3) { | |
1137 | establishlink(fi); | |
1138 | test_and_set_bit(FLG_L3_INIT, &st->l2.flag); | |
1139 | } else | |
1140 | FsmChangeState(fi, ST_L2_4); | |
1141 | if (skb_queue_len(&st->l2.ui_queue)) | |
1142 | tx_ui(st); | |
1143 | } | |
1144 | ||
1145 | static void | |
1146 | l2_st5_tout_200(struct FsmInst *fi, int event, void *arg) | |
1147 | { | |
1148 | struct PStack *st = fi->userdata; | |
1149 | ||
1150 | if (test_bit(FLG_LAPD, &st->l2.flag) && | |
1151 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { | |
1152 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); | |
1153 | } else if (st->l2.rc == st->l2.N200) { | |
1154 | FsmChangeState(fi, ST_L2_4); | |
1155 | test_and_clear_bit(FLG_T200_RUN, &st->l2.flag); | |
1156 | skb_queue_purge(&st->l2.i_queue); | |
1157 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'G'); | |
1158 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
1159 | st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL); | |
1160 | st5_dl_release_l2l3(st); | |
1161 | } else { | |
1162 | st->l2.rc++; | |
1163 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); | |
1164 | send_uframe(st, (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM) | |
1165 | | 0x10, CMD); | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | static void | |
1170 | l2_st6_tout_200(struct FsmInst *fi, int event, void *arg) | |
1171 | { | |
1172 | struct PStack *st = fi->userdata; | |
1173 | ||
1174 | if (test_bit(FLG_LAPD, &st->l2.flag) && | |
1175 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { | |
1176 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); | |
1177 | } else if (st->l2.rc == st->l2.N200) { | |
1178 | FsmChangeState(fi, ST_L2_4); | |
1179 | test_and_clear_bit(FLG_T200_RUN, &st->l2.flag); | |
1180 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'H'); | |
1181 | lapb_dl_release_l2l3(st, CONFIRM); | |
1182 | } else { | |
1183 | st->l2.rc++; | |
1184 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, | |
1185 | NULL, 9); | |
1186 | send_uframe(st, DISC | 0x10, CMD); | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | static void | |
1191 | l2_st7_tout_200(struct FsmInst *fi, int event, void *arg) | |
1192 | { | |
1193 | struct PStack *st = fi->userdata; | |
1194 | ||
1195 | if (test_bit(FLG_LAPD, &st->l2.flag) && | |
1196 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { | |
1197 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); | |
1198 | return; | |
1199 | } | |
1200 | test_and_clear_bit(FLG_T200_RUN, &st->l2.flag); | |
1201 | st->l2.rc = 0; | |
1202 | FsmChangeState(fi, ST_L2_8); | |
1203 | ||
1204 | transmit_enquiry(st); | |
1205 | st->l2.rc++; | |
1206 | } | |
1207 | ||
1208 | static void | |
1209 | l2_st8_tout_200(struct FsmInst *fi, int event, void *arg) | |
1210 | { | |
1211 | struct PStack *st = fi->userdata; | |
1212 | ||
1213 | if (test_bit(FLG_LAPD, &st->l2.flag) && | |
1214 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { | |
1215 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9); | |
1216 | return; | |
1217 | } | |
1218 | test_and_clear_bit(FLG_T200_RUN, &st->l2.flag); | |
1219 | if (st->l2.rc == st->l2.N200) { | |
1220 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'I'); | |
1221 | establishlink(fi); | |
1222 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); | |
1223 | } else { | |
1224 | transmit_enquiry(st); | |
1225 | st->l2.rc++; | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | static void | |
1230 | l2_st7_tout_203(struct FsmInst *fi, int event, void *arg) | |
1231 | { | |
1232 | struct PStack *st = fi->userdata; | |
1233 | ||
1234 | if (test_bit(FLG_LAPD, &st->l2.flag) && | |
1235 | test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) { | |
1236 | FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 9); | |
1237 | return; | |
1238 | } | |
1239 | FsmChangeState(fi, ST_L2_8); | |
1240 | transmit_enquiry(st); | |
1241 | st->l2.rc = 0; | |
1242 | } | |
1243 | ||
1244 | static void | |
1245 | l2_pull_iqueue(struct FsmInst *fi, int event, void *arg) | |
1246 | { | |
1247 | struct PStack *st = fi->userdata; | |
1248 | struct sk_buff *skb, *oskb; | |
1249 | struct Layer2 *l2 = &st->l2; | |
1250 | u_char header[MAX_HEADER_LEN]; | |
1251 | int i; | |
1252 | int unsigned p1; | |
1253 | u_long flags; | |
1254 | ||
1255 | if (!cansend(st)) | |
1256 | return; | |
1257 | ||
1258 | skb = skb_dequeue(&l2->i_queue); | |
1259 | if (!skb) | |
1260 | return; | |
1261 | ||
1262 | spin_lock_irqsave(&l2->lock, flags); | |
1263 | if(test_bit(FLG_MOD128, &l2->flag)) | |
1264 | p1 = (l2->vs - l2->va) % 128; | |
1265 | else | |
1266 | p1 = (l2->vs - l2->va) % 8; | |
1267 | p1 = (p1 + l2->sow) % l2->window; | |
1268 | if (l2->windowar[p1]) { | |
1269 | printk(KERN_WARNING "isdnl2 try overwrite ack queue entry %d\n", | |
1270 | p1); | |
1271 | dev_kfree_skb(l2->windowar[p1]); | |
1272 | } | |
1273 | l2->windowar[p1] = skb_clone(skb, GFP_ATOMIC); | |
1274 | ||
1275 | i = sethdraddr(&st->l2, header, CMD); | |
1276 | ||
1277 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1278 | header[i++] = l2->vs << 1; | |
1279 | header[i++] = l2->vr << 1; | |
1280 | l2->vs = (l2->vs + 1) % 128; | |
1281 | } else { | |
1282 | header[i++] = (l2->vr << 5) | (l2->vs << 1); | |
1283 | l2->vs = (l2->vs + 1) % 8; | |
1284 | } | |
1285 | spin_unlock_irqrestore(&l2->lock, flags); | |
1286 | p1 = skb->data - skb->head; | |
1287 | if (p1 >= i) | |
1288 | memcpy(skb_push(skb, i), header, i); | |
1289 | else { | |
1290 | printk(KERN_WARNING | |
1291 | "isdl2 pull_iqueue skb header(%d/%d) too short\n", i, p1); | |
1292 | oskb = skb; | |
1293 | skb = alloc_skb(oskb->len + i, GFP_ATOMIC); | |
1294 | memcpy(skb_put(skb, i), header, i); | |
1295 | memcpy(skb_put(skb, oskb->len), oskb->data, oskb->len); | |
672c3fd9 | 1296 | dev_kfree_skb(oskb); |
1da177e4 LT |
1297 | } |
1298 | st->l2.l2l1(st, PH_PULL | INDICATION, skb); | |
1299 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); | |
1300 | if (!test_and_set_bit(FLG_T200_RUN, &st->l2.flag)) { | |
1301 | FsmDelTimer(&st->l2.t203, 13); | |
1302 | FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 11); | |
1303 | } | |
1304 | if (skb_queue_len(&l2->i_queue) && cansend(st)) | |
1305 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); | |
1306 | } | |
1307 | ||
1308 | static void | |
1309 | l2_st8_got_super(struct FsmInst *fi, int event, void *arg) | |
1310 | { | |
1311 | struct PStack *st = fi->userdata; | |
1312 | struct sk_buff *skb = arg; | |
1313 | int PollFlag, rsp, rnr = 0; | |
1314 | unsigned int nr; | |
1315 | struct Layer2 *l2 = &st->l2; | |
1316 | ||
1317 | rsp = *skb->data & 0x2; | |
1318 | if (test_bit(FLG_ORIG, &l2->flag)) | |
1319 | rsp = !rsp; | |
1320 | ||
1321 | skb_pull(skb, l2addrsize(l2)); | |
1322 | ||
1323 | if (IsRNR(skb->data, st)) { | |
1324 | set_peer_busy(l2); | |
1325 | rnr = 1; | |
1326 | } else | |
1327 | clear_peer_busy(l2); | |
1328 | ||
1329 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1330 | PollFlag = (skb->data[1] & 0x1) == 0x1; | |
1331 | nr = skb->data[1] >> 1; | |
1332 | } else { | |
1333 | PollFlag = (skb->data[0] & 0x10); | |
1334 | nr = (skb->data[0] >> 5) & 0x7; | |
1335 | } | |
672c3fd9 | 1336 | dev_kfree_skb(skb); |
1da177e4 LT |
1337 | |
1338 | if (rsp && PollFlag) { | |
1339 | if (legalnr(st, nr)) { | |
1340 | if (rnr) { | |
1341 | restart_t200(st, 15); | |
1342 | } else { | |
1343 | stop_t200(st, 16); | |
1344 | FsmAddTimer(&l2->t203, l2->T203, | |
1345 | EV_L2_T203, NULL, 5); | |
1346 | setva(st, nr); | |
1347 | } | |
1348 | invoke_retransmission(st, nr); | |
1349 | FsmChangeState(fi, ST_L2_7); | |
1350 | if (skb_queue_len(&l2->i_queue) && cansend(st)) | |
1351 | st->l2.l2l1(st, PH_PULL | REQUEST, NULL); | |
1352 | } else | |
1353 | nrerrorrecovery(fi); | |
1354 | } else { | |
1355 | if (!rsp && PollFlag) | |
1356 | enquiry_response(st); | |
1357 | if (legalnr(st, nr)) { | |
1358 | setva(st, nr); | |
1359 | } else | |
1360 | nrerrorrecovery(fi); | |
1361 | } | |
1362 | } | |
1363 | ||
1364 | static void | |
1365 | l2_got_FRMR(struct FsmInst *fi, int event, void *arg) | |
1366 | { | |
1367 | struct PStack *st = fi->userdata; | |
1368 | struct sk_buff *skb = arg; | |
1369 | ||
1370 | skb_pull(skb, l2addrsize(&st->l2) + 1); | |
1371 | ||
1372 | if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */ | |
1373 | (IsUA(skb->data) && (fi->state == ST_L2_7))) { | |
1374 | st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'K'); | |
1375 | establishlink(fi); | |
1376 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); | |
1377 | } | |
672c3fd9 | 1378 | dev_kfree_skb(skb); |
1da177e4 LT |
1379 | } |
1380 | ||
1381 | static void | |
1382 | l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1383 | { | |
1384 | struct PStack *st = fi->userdata; | |
1385 | ||
1386 | skb_queue_purge(&st->l2.ui_queue); | |
1387 | st->l2.tei = -1; | |
1388 | FsmChangeState(fi, ST_L2_1); | |
1389 | } | |
1390 | ||
1391 | static void | |
1392 | l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1393 | { | |
1394 | struct PStack *st = fi->userdata; | |
1395 | ||
1396 | skb_queue_purge(&st->l2.ui_queue); | |
1397 | st->l2.tei = -1; | |
1398 | st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL); | |
1399 | FsmChangeState(fi, ST_L2_1); | |
1400 | } | |
1401 | ||
1402 | static void | |
1403 | l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1404 | { | |
1405 | struct PStack *st = fi->userdata; | |
1406 | ||
1407 | skb_queue_purge(&st->l2.i_queue); | |
1408 | skb_queue_purge(&st->l2.ui_queue); | |
1409 | freewin(st); | |
1410 | st->l2.tei = -1; | |
1411 | stop_t200(st, 17); | |
1412 | st5_dl_release_l2l3(st); | |
1413 | FsmChangeState(fi, ST_L2_1); | |
1414 | } | |
1415 | ||
1416 | static void | |
1417 | l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1418 | { | |
1419 | struct PStack *st = fi->userdata; | |
1420 | ||
1421 | skb_queue_purge(&st->l2.ui_queue); | |
1422 | st->l2.tei = -1; | |
1423 | stop_t200(st, 18); | |
1424 | st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL); | |
1425 | FsmChangeState(fi, ST_L2_1); | |
1426 | } | |
1427 | ||
1428 | static void | |
1429 | l2_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1430 | { | |
1431 | struct PStack *st = fi->userdata; | |
1432 | ||
1433 | skb_queue_purge(&st->l2.i_queue); | |
1434 | skb_queue_purge(&st->l2.ui_queue); | |
1435 | freewin(st); | |
1436 | st->l2.tei = -1; | |
1437 | stop_t200(st, 17); | |
1438 | FsmDelTimer(&st->l2.t203, 19); | |
1439 | st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL); | |
1440 | FsmChangeState(fi, ST_L2_1); | |
1441 | } | |
1442 | ||
1443 | static void | |
1444 | l2_st14_persistant_da(struct FsmInst *fi, int event, void *arg) | |
1445 | { | |
1446 | struct PStack *st = fi->userdata; | |
1447 | ||
1448 | skb_queue_purge(&st->l2.i_queue); | |
1449 | skb_queue_purge(&st->l2.ui_queue); | |
1450 | if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag)) | |
1451 | st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL); | |
1452 | } | |
1453 | ||
1454 | static void | |
1455 | l2_st5_persistant_da(struct FsmInst *fi, int event, void *arg) | |
1456 | { | |
1457 | struct PStack *st = fi->userdata; | |
1458 | ||
1459 | skb_queue_purge(&st->l2.i_queue); | |
1460 | skb_queue_purge(&st->l2.ui_queue); | |
1461 | freewin(st); | |
1462 | stop_t200(st, 19); | |
1463 | st5_dl_release_l2l3(st); | |
1464 | FsmChangeState(fi, ST_L2_4); | |
1465 | } | |
1466 | ||
1467 | static void | |
1468 | l2_st6_persistant_da(struct FsmInst *fi, int event, void *arg) | |
1469 | { | |
1470 | struct PStack *st = fi->userdata; | |
1471 | ||
1472 | skb_queue_purge(&st->l2.ui_queue); | |
1473 | stop_t200(st, 20); | |
1474 | st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL); | |
1475 | FsmChangeState(fi, ST_L2_4); | |
1476 | } | |
1477 | ||
1478 | static void | |
1479 | l2_persistant_da(struct FsmInst *fi, int event, void *arg) | |
1480 | { | |
1481 | struct PStack *st = fi->userdata; | |
1482 | ||
1483 | skb_queue_purge(&st->l2.i_queue); | |
1484 | skb_queue_purge(&st->l2.ui_queue); | |
1485 | freewin(st); | |
1486 | stop_t200(st, 19); | |
1487 | FsmDelTimer(&st->l2.t203, 19); | |
1488 | st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL); | |
1489 | FsmChangeState(fi, ST_L2_4); | |
1490 | } | |
1491 | ||
1492 | static void | |
1493 | l2_set_own_busy(struct FsmInst *fi, int event, void *arg) | |
1494 | { | |
1495 | struct PStack *st = fi->userdata; | |
1496 | ||
1497 | if(!test_and_set_bit(FLG_OWN_BUSY, &st->l2.flag)) { | |
1498 | enquiry_cr(st, RNR, RSP, 0); | |
1499 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); | |
1500 | } | |
1501 | } | |
1502 | ||
1503 | static void | |
1504 | l2_clear_own_busy(struct FsmInst *fi, int event, void *arg) | |
1505 | { | |
1506 | struct PStack *st = fi->userdata; | |
1507 | ||
1508 | if(!test_and_clear_bit(FLG_OWN_BUSY, &st->l2.flag)) { | |
1509 | enquiry_cr(st, RR, RSP, 0); | |
1510 | test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag); | |
1511 | } | |
1512 | } | |
1513 | ||
1514 | static void | |
1515 | l2_frame_error(struct FsmInst *fi, int event, void *arg) | |
1516 | { | |
1517 | struct PStack *st = fi->userdata; | |
1518 | ||
1519 | st->ma.layer(st, MDL_ERROR | INDICATION, arg); | |
1520 | } | |
1521 | ||
1522 | static void | |
1523 | l2_frame_error_reest(struct FsmInst *fi, int event, void *arg) | |
1524 | { | |
1525 | struct PStack *st = fi->userdata; | |
1526 | ||
1527 | st->ma.layer(st, MDL_ERROR | INDICATION, arg); | |
1528 | establishlink(fi); | |
1529 | test_and_clear_bit(FLG_L3_INIT, &st->l2.flag); | |
1530 | } | |
1531 | ||
1532 | static struct FsmNode L2FnList[] __initdata = | |
1533 | { | |
1534 | {ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign}, | |
1535 | {ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3}, | |
1536 | {ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish}, | |
1537 | {ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3}, | |
1538 | {ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, | |
1539 | {ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, | |
1540 | {ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release}, | |
1541 | {ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel}, | |
1542 | {ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect}, | |
1543 | {ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect}, | |
1544 | {ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest}, | |
1545 | {ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull}, | |
1546 | {ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue}, | |
1547 | {ST_L2_1, EV_L2_DL_UNIT_DATA, l2_queue_ui_assign}, | |
1548 | {ST_L2_2, EV_L2_DL_UNIT_DATA, l2_queue_ui}, | |
1549 | {ST_L2_3, EV_L2_DL_UNIT_DATA, l2_queue_ui}, | |
1550 | {ST_L2_4, EV_L2_DL_UNIT_DATA, l2_send_ui}, | |
1551 | {ST_L2_5, EV_L2_DL_UNIT_DATA, l2_send_ui}, | |
1552 | {ST_L2_6, EV_L2_DL_UNIT_DATA, l2_send_ui}, | |
1553 | {ST_L2_7, EV_L2_DL_UNIT_DATA, l2_send_ui}, | |
1554 | {ST_L2_8, EV_L2_DL_UNIT_DATA, l2_send_ui}, | |
1555 | {ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1556 | {ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1557 | {ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1558 | {ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove}, | |
1559 | {ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove}, | |
1560 | {ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove}, | |
1561 | {ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove}, | |
1562 | {ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove}, | |
1563 | {ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove}, | |
1564 | {ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove}, | |
1565 | {ST_L2_4, EV_L2_SABME, l2_start_multi}, | |
1566 | {ST_L2_5, EV_L2_SABME, l2_send_UA}, | |
1567 | {ST_L2_6, EV_L2_SABME, l2_send_DM}, | |
1568 | {ST_L2_7, EV_L2_SABME, l2_restart_multi}, | |
1569 | {ST_L2_8, EV_L2_SABME, l2_restart_multi}, | |
1570 | {ST_L2_4, EV_L2_DISC, l2_send_DM}, | |
1571 | {ST_L2_5, EV_L2_DISC, l2_send_DM}, | |
1572 | {ST_L2_6, EV_L2_DISC, l2_send_UA}, | |
1573 | {ST_L2_7, EV_L2_DISC, l2_stop_multi}, | |
1574 | {ST_L2_8, EV_L2_DISC, l2_stop_multi}, | |
1575 | {ST_L2_4, EV_L2_UA, l2_mdl_error_ua}, | |
1576 | {ST_L2_5, EV_L2_UA, l2_connected}, | |
1577 | {ST_L2_6, EV_L2_UA, l2_released}, | |
1578 | {ST_L2_7, EV_L2_UA, l2_mdl_error_ua}, | |
1579 | {ST_L2_8, EV_L2_UA, l2_mdl_error_ua}, | |
1580 | {ST_L2_4, EV_L2_DM, l2_reestablish}, | |
1581 | {ST_L2_5, EV_L2_DM, l2_st5_dm_release}, | |
1582 | {ST_L2_6, EV_L2_DM, l2_st6_dm_release}, | |
1583 | {ST_L2_7, EV_L2_DM, l2_mdl_error_dm}, | |
1584 | {ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm}, | |
1585 | {ST_L2_1, EV_L2_UI, l2_got_ui}, | |
1586 | {ST_L2_2, EV_L2_UI, l2_got_ui}, | |
1587 | {ST_L2_3, EV_L2_UI, l2_got_ui}, | |
1588 | {ST_L2_4, EV_L2_UI, l2_got_ui}, | |
1589 | {ST_L2_5, EV_L2_UI, l2_got_ui}, | |
1590 | {ST_L2_6, EV_L2_UI, l2_got_ui}, | |
1591 | {ST_L2_7, EV_L2_UI, l2_got_ui}, | |
1592 | {ST_L2_8, EV_L2_UI, l2_got_ui}, | |
1593 | {ST_L2_7, EV_L2_FRMR, l2_got_FRMR}, | |
1594 | {ST_L2_8, EV_L2_FRMR, l2_got_FRMR}, | |
1595 | {ST_L2_7, EV_L2_SUPER, l2_st7_got_super}, | |
1596 | {ST_L2_8, EV_L2_SUPER, l2_st8_got_super}, | |
1597 | {ST_L2_7, EV_L2_I, l2_got_iframe}, | |
1598 | {ST_L2_8, EV_L2_I, l2_got_iframe}, | |
1599 | {ST_L2_5, EV_L2_T200, l2_st5_tout_200}, | |
1600 | {ST_L2_6, EV_L2_T200, l2_st6_tout_200}, | |
1601 | {ST_L2_7, EV_L2_T200, l2_st7_tout_200}, | |
1602 | {ST_L2_8, EV_L2_T200, l2_st8_tout_200}, | |
1603 | {ST_L2_7, EV_L2_T203, l2_st7_tout_203}, | |
1604 | {ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue}, | |
1605 | {ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, | |
1606 | {ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, | |
1607 | {ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, | |
1608 | {ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, | |
1609 | {ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1610 | {ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1611 | {ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1612 | {ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest}, | |
1613 | {ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest}, | |
1614 | {ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistant_da}, | |
1615 | {ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove}, | |
1616 | {ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove}, | |
1617 | {ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistant_da}, | |
1618 | {ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistant_da}, | |
1619 | {ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistant_da}, | |
1620 | {ST_L2_7, EV_L1_DEACTIVATE, l2_persistant_da}, | |
1621 | {ST_L2_8, EV_L1_DEACTIVATE, l2_persistant_da}, | |
1622 | }; | |
1623 | ||
1624 | #define L2_FN_COUNT (sizeof(L2FnList)/sizeof(struct FsmNode)) | |
1625 | ||
1626 | static void | |
1627 | isdnl2_l1l2(struct PStack *st, int pr, void *arg) | |
1628 | { | |
1629 | struct sk_buff *skb = arg; | |
1630 | u_char *datap; | |
1631 | int ret = 1, len; | |
1632 | int c = 0; | |
1633 | ||
1634 | switch (pr) { | |
1635 | case (PH_DATA | INDICATION): | |
1636 | datap = skb->data; | |
1637 | len = l2addrsize(&st->l2); | |
1638 | if (skb->len > len) | |
1639 | datap += len; | |
1640 | else { | |
1641 | FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'N'); | |
672c3fd9 | 1642 | dev_kfree_skb(skb); |
1da177e4 LT |
1643 | return; |
1644 | } | |
1645 | if (!(*datap & 1)) { /* I-Frame */ | |
1646 | if(!(c = iframe_error(st, skb))) | |
1647 | ret = FsmEvent(&st->l2.l2m, EV_L2_I, skb); | |
1648 | } else if (IsSFrame(datap, st)) { /* S-Frame */ | |
1649 | if(!(c = super_error(st, skb))) | |
1650 | ret = FsmEvent(&st->l2.l2m, EV_L2_SUPER, skb); | |
1651 | } else if (IsUI(datap)) { | |
1652 | if(!(c = UI_error(st, skb))) | |
1653 | ret = FsmEvent(&st->l2.l2m, EV_L2_UI, skb); | |
1654 | } else if (IsSABME(datap, st)) { | |
1655 | if(!(c = unnum_error(st, skb, CMD))) | |
1656 | ret = FsmEvent(&st->l2.l2m, EV_L2_SABME, skb); | |
1657 | } else if (IsUA(datap)) { | |
1658 | if(!(c = unnum_error(st, skb, RSP))) | |
1659 | ret = FsmEvent(&st->l2.l2m, EV_L2_UA, skb); | |
1660 | } else if (IsDISC(datap)) { | |
1661 | if(!(c = unnum_error(st, skb, CMD))) | |
1662 | ret = FsmEvent(&st->l2.l2m, EV_L2_DISC, skb); | |
1663 | } else if (IsDM(datap)) { | |
1664 | if(!(c = unnum_error(st, skb, RSP))) | |
1665 | ret = FsmEvent(&st->l2.l2m, EV_L2_DM, skb); | |
1666 | } else if (IsFRMR(datap)) { | |
1667 | if(!(c = FRMR_error(st,skb))) | |
1668 | ret = FsmEvent(&st->l2.l2m, EV_L2_FRMR, skb); | |
1669 | } else { | |
1670 | FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'L'); | |
672c3fd9 | 1671 | dev_kfree_skb(skb); |
1da177e4 LT |
1672 | ret = 0; |
1673 | } | |
1674 | if(c) { | |
672c3fd9 | 1675 | dev_kfree_skb(skb); |
1da177e4 LT |
1676 | FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *)(long)c); |
1677 | ret = 0; | |
1678 | } | |
1679 | if (ret) | |
672c3fd9 | 1680 | dev_kfree_skb(skb); |
1da177e4 LT |
1681 | break; |
1682 | case (PH_PULL | CONFIRM): | |
1683 | FsmEvent(&st->l2.l2m, EV_L2_ACK_PULL, arg); | |
1684 | break; | |
1685 | case (PH_PAUSE | INDICATION): | |
1686 | test_and_set_bit(FLG_DCHAN_BUSY, &st->l2.flag); | |
1687 | break; | |
1688 | case (PH_PAUSE | CONFIRM): | |
1689 | test_and_clear_bit(FLG_DCHAN_BUSY, &st->l2.flag); | |
1690 | break; | |
1691 | case (PH_ACTIVATE | CONFIRM): | |
1692 | case (PH_ACTIVATE | INDICATION): | |
1693 | test_and_set_bit(FLG_L1_ACTIV, &st->l2.flag); | |
1694 | if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag)) | |
1695 | FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg); | |
1696 | break; | |
1697 | case (PH_DEACTIVATE | INDICATION): | |
1698 | case (PH_DEACTIVATE | CONFIRM): | |
1699 | test_and_clear_bit(FLG_L1_ACTIV, &st->l2.flag); | |
1700 | FsmEvent(&st->l2.l2m, EV_L1_DEACTIVATE, arg); | |
1701 | break; | |
1702 | default: | |
1703 | l2m_debug(&st->l2.l2m, "l2 unknown pr %04x", pr); | |
1704 | break; | |
1705 | } | |
1706 | } | |
1707 | ||
1708 | static void | |
1709 | isdnl2_l3l2(struct PStack *st, int pr, void *arg) | |
1710 | { | |
1711 | switch (pr) { | |
1712 | case (DL_DATA | REQUEST): | |
1713 | if (FsmEvent(&st->l2.l2m, EV_L2_DL_DATA, arg)) { | |
1714 | dev_kfree_skb((struct sk_buff *) arg); | |
1715 | } | |
1716 | break; | |
1717 | case (DL_UNIT_DATA | REQUEST): | |
1718 | if (FsmEvent(&st->l2.l2m, EV_L2_DL_UNIT_DATA, arg)) { | |
1719 | dev_kfree_skb((struct sk_buff *) arg); | |
1720 | } | |
1721 | break; | |
1722 | case (DL_ESTABLISH | REQUEST): | |
1723 | if (test_bit(FLG_L1_ACTIV, &st->l2.flag)) { | |
1724 | if (test_bit(FLG_LAPD, &st->l2.flag) || | |
1725 | test_bit(FLG_ORIG, &st->l2.flag)) { | |
1726 | FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg); | |
1727 | } | |
1728 | } else { | |
1729 | if (test_bit(FLG_LAPD, &st->l2.flag) || | |
1730 | test_bit(FLG_ORIG, &st->l2.flag)) { | |
1731 | test_and_set_bit(FLG_ESTAB_PEND, &st->l2.flag); | |
1732 | } | |
1733 | st->l2.l2l1(st, PH_ACTIVATE, NULL); | |
1734 | } | |
1735 | break; | |
1736 | case (DL_RELEASE | REQUEST): | |
1737 | if (test_bit(FLG_LAPB, &st->l2.flag)) { | |
1738 | st->l2.l2l1(st, PH_DEACTIVATE, NULL); | |
1739 | } | |
1740 | FsmEvent(&st->l2.l2m, EV_L2_DL_RELEASE_REQ, arg); | |
1741 | break; | |
1742 | case (MDL_ASSIGN | REQUEST): | |
1743 | FsmEvent(&st->l2.l2m, EV_L2_MDL_ASSIGN, arg); | |
1744 | break; | |
1745 | case (MDL_REMOVE | REQUEST): | |
1746 | FsmEvent(&st->l2.l2m, EV_L2_MDL_REMOVE, arg); | |
1747 | break; | |
1748 | case (MDL_ERROR | RESPONSE): | |
1749 | FsmEvent(&st->l2.l2m, EV_L2_MDL_ERROR, arg); | |
1750 | break; | |
1751 | } | |
1752 | } | |
1753 | ||
1754 | void | |
1755 | releasestack_isdnl2(struct PStack *st) | |
1756 | { | |
1757 | FsmDelTimer(&st->l2.t200, 21); | |
1758 | FsmDelTimer(&st->l2.t203, 16); | |
1759 | skb_queue_purge(&st->l2.i_queue); | |
1760 | skb_queue_purge(&st->l2.ui_queue); | |
1761 | ReleaseWin(&st->l2); | |
1762 | } | |
1763 | ||
1764 | static void | |
1765 | l2m_debug(struct FsmInst *fi, char *fmt, ...) | |
1766 | { | |
1767 | va_list args; | |
1768 | struct PStack *st = fi->userdata; | |
1769 | ||
1770 | va_start(args, fmt); | |
1771 | VHiSax_putstatus(st->l1.hardware, st->l2.debug_id, fmt, args); | |
1772 | va_end(args); | |
1773 | } | |
1774 | ||
1775 | void | |
1776 | setstack_isdnl2(struct PStack *st, char *debug_id) | |
1777 | { | |
1778 | spin_lock_init(&st->l2.lock); | |
1779 | st->l1.l1l2 = isdnl2_l1l2; | |
1780 | st->l3.l3l2 = isdnl2_l3l2; | |
1781 | ||
1782 | skb_queue_head_init(&st->l2.i_queue); | |
1783 | skb_queue_head_init(&st->l2.ui_queue); | |
1784 | InitWin(&st->l2); | |
1785 | st->l2.debug = 0; | |
1786 | ||
1787 | st->l2.l2m.fsm = &l2fsm; | |
1788 | if (test_bit(FLG_LAPB, &st->l2.flag)) | |
1789 | st->l2.l2m.state = ST_L2_4; | |
1790 | else | |
1791 | st->l2.l2m.state = ST_L2_1; | |
1792 | st->l2.l2m.debug = 0; | |
1793 | st->l2.l2m.userdata = st; | |
1794 | st->l2.l2m.userint = 0; | |
1795 | st->l2.l2m.printdebug = l2m_debug; | |
1796 | strcpy(st->l2.debug_id, debug_id); | |
1797 | ||
1798 | FsmInitTimer(&st->l2.l2m, &st->l2.t200); | |
1799 | FsmInitTimer(&st->l2.l2m, &st->l2.t203); | |
1800 | } | |
1801 | ||
1802 | static void | |
1803 | transl2_l3l2(struct PStack *st, int pr, void *arg) | |
1804 | { | |
1805 | switch (pr) { | |
1806 | case (DL_DATA | REQUEST): | |
1807 | case (DL_UNIT_DATA | REQUEST): | |
1808 | st->l2.l2l1(st, PH_DATA | REQUEST, arg); | |
1809 | break; | |
1810 | case (DL_ESTABLISH | REQUEST): | |
1811 | st->l2.l2l1(st, PH_ACTIVATE | REQUEST, NULL); | |
1812 | break; | |
1813 | case (DL_RELEASE | REQUEST): | |
1814 | st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL); | |
1815 | break; | |
1816 | } | |
1817 | } | |
1818 | ||
1819 | void | |
1820 | setstack_transl2(struct PStack *st) | |
1821 | { | |
1822 | st->l3.l3l2 = transl2_l3l2; | |
1823 | } | |
1824 | ||
1825 | void | |
1826 | releasestack_transl2(struct PStack *st) | |
1827 | { | |
1828 | } | |
1829 | ||
1830 | int __init | |
1831 | Isdnl2New(void) | |
1832 | { | |
1833 | l2fsm.state_count = L2_STATE_COUNT; | |
1834 | l2fsm.event_count = L2_EVENT_COUNT; | |
1835 | l2fsm.strEvent = strL2Event; | |
1836 | l2fsm.strState = strL2State; | |
1837 | return FsmNew(&l2fsm, L2FnList, L2_FN_COUNT); | |
1838 | } | |
1839 | ||
1840 | void | |
1841 | Isdnl2Free(void) | |
1842 | { | |
1843 | FsmFree(&l2fsm); | |
1844 | } |