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1b2b03f8 KK |
1 | /* |
2 | * | |
3 | * Author Karsten Keil <kkeil@novell.com> | |
4 | * | |
5 | * Copyright 2008 by Karsten Keil <kkeil@novell.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | */ | |
17 | ||
5b834354 | 18 | #include <linux/mISDNif.h> |
5a0e3ad6 | 19 | #include <linux/slab.h> |
5b834354 | 20 | #include "core.h" |
1b2b03f8 KK |
21 | #include "fsm.h" |
22 | #include "layer2.h" | |
23 | ||
dfa96ec1 | 24 | static u_int *debug; |
1b2b03f8 KK |
25 | |
26 | static | |
27 | struct Fsm l2fsm = {NULL, 0, 0, NULL, NULL}; | |
28 | ||
29 | static char *strL2State[] = | |
30 | { | |
31 | "ST_L2_1", | |
32 | "ST_L2_2", | |
33 | "ST_L2_3", | |
34 | "ST_L2_4", | |
35 | "ST_L2_5", | |
36 | "ST_L2_6", | |
37 | "ST_L2_7", | |
38 | "ST_L2_8", | |
39 | }; | |
40 | ||
41 | enum { | |
42 | EV_L2_UI, | |
43 | EV_L2_SABME, | |
44 | EV_L2_DISC, | |
45 | EV_L2_DM, | |
46 | EV_L2_UA, | |
47 | EV_L2_FRMR, | |
48 | EV_L2_SUPER, | |
49 | EV_L2_I, | |
50 | EV_L2_DL_DATA, | |
51 | EV_L2_ACK_PULL, | |
52 | EV_L2_DL_UNITDATA, | |
53 | EV_L2_DL_ESTABLISH_REQ, | |
54 | EV_L2_DL_RELEASE_REQ, | |
55 | EV_L2_MDL_ASSIGN, | |
56 | EV_L2_MDL_REMOVE, | |
57 | EV_L2_MDL_ERROR, | |
58 | EV_L1_DEACTIVATE, | |
59 | EV_L2_T200, | |
60 | EV_L2_T203, | |
61 | EV_L2_SET_OWN_BUSY, | |
62 | EV_L2_CLEAR_OWN_BUSY, | |
63 | EV_L2_FRAME_ERROR, | |
64 | }; | |
65 | ||
66 | #define L2_EVENT_COUNT (EV_L2_FRAME_ERROR+1) | |
67 | ||
68 | static char *strL2Event[] = | |
69 | { | |
70 | "EV_L2_UI", | |
71 | "EV_L2_SABME", | |
72 | "EV_L2_DISC", | |
73 | "EV_L2_DM", | |
74 | "EV_L2_UA", | |
75 | "EV_L2_FRMR", | |
76 | "EV_L2_SUPER", | |
77 | "EV_L2_I", | |
78 | "EV_L2_DL_DATA", | |
79 | "EV_L2_ACK_PULL", | |
80 | "EV_L2_DL_UNITDATA", | |
81 | "EV_L2_DL_ESTABLISH_REQ", | |
82 | "EV_L2_DL_RELEASE_REQ", | |
83 | "EV_L2_MDL_ASSIGN", | |
84 | "EV_L2_MDL_REMOVE", | |
85 | "EV_L2_MDL_ERROR", | |
86 | "EV_L1_DEACTIVATE", | |
87 | "EV_L2_T200", | |
88 | "EV_L2_T203", | |
89 | "EV_L2_SET_OWN_BUSY", | |
90 | "EV_L2_CLEAR_OWN_BUSY", | |
91 | "EV_L2_FRAME_ERROR", | |
92 | }; | |
93 | ||
94 | static void | |
95 | l2m_debug(struct FsmInst *fi, char *fmt, ...) | |
96 | { | |
97 | struct layer2 *l2 = fi->userdata; | |
98 | va_list va; | |
99 | ||
100 | if (!(*debug & DEBUG_L2_FSM)) | |
101 | return; | |
102 | va_start(va, fmt); | |
d796509a | 103 | printk(KERN_DEBUG "l2 (sapi %d tei %d): ", l2->sapi, l2->tei); |
1b2b03f8 KK |
104 | vprintk(fmt, va); |
105 | printk("\n"); | |
106 | va_end(va); | |
107 | } | |
108 | ||
109 | inline u_int | |
110 | l2headersize(struct layer2 *l2, int ui) | |
111 | { | |
112 | return ((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) + | |
113 | (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1); | |
114 | } | |
115 | ||
116 | inline u_int | |
117 | l2addrsize(struct layer2 *l2) | |
118 | { | |
119 | return test_bit(FLG_LAPD, &l2->flag) ? 2 : 1; | |
120 | } | |
121 | ||
122 | static u_int | |
123 | l2_newid(struct layer2 *l2) | |
124 | { | |
125 | u_int id; | |
126 | ||
127 | id = l2->next_id++; | |
128 | if (id == 0x7fff) | |
129 | l2->next_id = 1; | |
130 | id <<= 16; | |
131 | id |= l2->tei << 8; | |
132 | id |= l2->sapi; | |
133 | return id; | |
134 | } | |
135 | ||
136 | static void | |
137 | l2up(struct layer2 *l2, u_int prim, struct sk_buff *skb) | |
138 | { | |
139 | int err; | |
140 | ||
141 | if (!l2->up) | |
142 | return; | |
143 | mISDN_HEAD_PRIM(skb) = prim; | |
144 | mISDN_HEAD_ID(skb) = (l2->ch.nr << 16) | l2->ch.addr; | |
145 | err = l2->up->send(l2->up, skb); | |
146 | if (err) { | |
147 | printk(KERN_WARNING "%s: err=%d\n", __func__, err); | |
148 | dev_kfree_skb(skb); | |
149 | } | |
150 | } | |
151 | ||
152 | static void | |
153 | l2up_create(struct layer2 *l2, u_int prim, int len, void *arg) | |
154 | { | |
155 | struct sk_buff *skb; | |
156 | struct mISDNhead *hh; | |
157 | int err; | |
158 | ||
159 | if (!l2->up) | |
160 | return; | |
161 | skb = mI_alloc_skb(len, GFP_ATOMIC); | |
162 | if (!skb) | |
163 | return; | |
164 | hh = mISDN_HEAD_P(skb); | |
165 | hh->prim = prim; | |
166 | hh->id = (l2->ch.nr << 16) | l2->ch.addr; | |
167 | if (len) | |
168 | memcpy(skb_put(skb, len), arg, len); | |
169 | err = l2->up->send(l2->up, skb); | |
170 | if (err) { | |
171 | printk(KERN_WARNING "%s: err=%d\n", __func__, err); | |
172 | dev_kfree_skb(skb); | |
173 | } | |
174 | } | |
175 | ||
176 | static int | |
177 | l2down_skb(struct layer2 *l2, struct sk_buff *skb) { | |
178 | int ret; | |
179 | ||
180 | ret = l2->ch.recv(l2->ch.peer, skb); | |
181 | if (ret && (*debug & DEBUG_L2_RECV)) | |
182 | printk(KERN_DEBUG "l2down_skb: ret(%d)\n", ret); | |
183 | return ret; | |
184 | } | |
185 | ||
186 | static int | |
187 | l2down_raw(struct layer2 *l2, struct sk_buff *skb) | |
188 | { | |
189 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
190 | ||
191 | if (hh->prim == PH_DATA_REQ) { | |
192 | if (test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) { | |
193 | skb_queue_tail(&l2->down_queue, skb); | |
194 | return 0; | |
195 | } | |
196 | l2->down_id = mISDN_HEAD_ID(skb); | |
197 | } | |
198 | return l2down_skb(l2, skb); | |
199 | } | |
200 | ||
201 | static int | |
202 | l2down(struct layer2 *l2, u_int prim, u_int id, struct sk_buff *skb) | |
203 | { | |
204 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
205 | ||
206 | hh->prim = prim; | |
207 | hh->id = id; | |
208 | return l2down_raw(l2, skb); | |
209 | } | |
210 | ||
211 | static int | |
212 | l2down_create(struct layer2 *l2, u_int prim, u_int id, int len, void *arg) | |
213 | { | |
214 | struct sk_buff *skb; | |
215 | int err; | |
216 | struct mISDNhead *hh; | |
217 | ||
218 | skb = mI_alloc_skb(len, GFP_ATOMIC); | |
219 | if (!skb) | |
220 | return -ENOMEM; | |
221 | hh = mISDN_HEAD_P(skb); | |
222 | hh->prim = prim; | |
223 | hh->id = id; | |
224 | if (len) | |
225 | memcpy(skb_put(skb, len), arg, len); | |
226 | err = l2down_raw(l2, skb); | |
227 | if (err) | |
228 | dev_kfree_skb(skb); | |
229 | return err; | |
230 | } | |
231 | ||
232 | static int | |
233 | ph_data_confirm(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb) { | |
234 | struct sk_buff *nskb = skb; | |
235 | int ret = -EAGAIN; | |
236 | ||
237 | if (test_bit(FLG_L1_NOTREADY, &l2->flag)) { | |
238 | if (hh->id == l2->down_id) { | |
239 | nskb = skb_dequeue(&l2->down_queue); | |
240 | if (nskb) { | |
241 | l2->down_id = mISDN_HEAD_ID(nskb); | |
242 | if (l2down_skb(l2, nskb)) { | |
243 | dev_kfree_skb(nskb); | |
244 | l2->down_id = MISDN_ID_NONE; | |
245 | } | |
246 | } else | |
247 | l2->down_id = MISDN_ID_NONE; | |
248 | if (ret) { | |
249 | dev_kfree_skb(skb); | |
250 | ret = 0; | |
251 | } | |
252 | if (l2->down_id == MISDN_ID_NONE) { | |
253 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); | |
254 | mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL); | |
255 | } | |
256 | } | |
257 | } | |
258 | if (!test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) { | |
259 | nskb = skb_dequeue(&l2->down_queue); | |
260 | if (nskb) { | |
261 | l2->down_id = mISDN_HEAD_ID(nskb); | |
262 | if (l2down_skb(l2, nskb)) { | |
263 | dev_kfree_skb(nskb); | |
264 | l2->down_id = MISDN_ID_NONE; | |
265 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); | |
266 | } | |
267 | } else | |
268 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); | |
269 | } | |
270 | return ret; | |
271 | } | |
272 | ||
273 | static int | |
274 | l2mgr(struct layer2 *l2, u_int prim, void *arg) { | |
275 | long c = (long)arg; | |
276 | ||
277 | printk(KERN_WARNING | |
278 | "l2mgr: addr:%x prim %x %c\n", l2->id, prim, (char)c); | |
279 | if (test_bit(FLG_LAPD, &l2->flag) && | |
280 | !test_bit(FLG_FIXED_TEI, &l2->flag)) { | |
281 | switch (c) { | |
282 | case 'C': | |
283 | case 'D': | |
284 | case 'G': | |
285 | case 'H': | |
286 | l2_tei(l2, prim, (u_long)arg); | |
287 | break; | |
288 | } | |
289 | } | |
290 | return 0; | |
291 | } | |
292 | ||
293 | static void | |
294 | set_peer_busy(struct layer2 *l2) { | |
295 | test_and_set_bit(FLG_PEER_BUSY, &l2->flag); | |
296 | if (skb_queue_len(&l2->i_queue) || skb_queue_len(&l2->ui_queue)) | |
297 | test_and_set_bit(FLG_L2BLOCK, &l2->flag); | |
298 | } | |
299 | ||
300 | static void | |
301 | clear_peer_busy(struct layer2 *l2) { | |
302 | if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag)) | |
303 | test_and_clear_bit(FLG_L2BLOCK, &l2->flag); | |
304 | } | |
305 | ||
306 | static void | |
307 | InitWin(struct layer2 *l2) | |
308 | { | |
309 | int i; | |
310 | ||
311 | for (i = 0; i < MAX_WINDOW; i++) | |
312 | l2->windowar[i] = NULL; | |
313 | } | |
314 | ||
315 | static int | |
316 | freewin(struct layer2 *l2) | |
317 | { | |
318 | int i, cnt = 0; | |
319 | ||
320 | for (i = 0; i < MAX_WINDOW; i++) { | |
321 | if (l2->windowar[i]) { | |
322 | cnt++; | |
323 | dev_kfree_skb(l2->windowar[i]); | |
324 | l2->windowar[i] = NULL; | |
325 | } | |
326 | } | |
327 | return cnt; | |
328 | } | |
329 | ||
330 | static void | |
331 | ReleaseWin(struct layer2 *l2) | |
332 | { | |
333 | int cnt = freewin(l2); | |
334 | ||
335 | if (cnt) | |
336 | printk(KERN_WARNING | |
337 | "isdnl2 freed %d skbuffs in release\n", cnt); | |
338 | } | |
339 | ||
340 | inline unsigned int | |
341 | cansend(struct layer2 *l2) | |
342 | { | |
343 | unsigned int p1; | |
344 | ||
345 | if (test_bit(FLG_MOD128, &l2->flag)) | |
346 | p1 = (l2->vs - l2->va) % 128; | |
347 | else | |
348 | p1 = (l2->vs - l2->va) % 8; | |
349 | return (p1 < l2->window) && !test_bit(FLG_PEER_BUSY, &l2->flag); | |
350 | } | |
351 | ||
352 | inline void | |
353 | clear_exception(struct layer2 *l2) | |
354 | { | |
355 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
356 | test_and_clear_bit(FLG_REJEXC, &l2->flag); | |
357 | test_and_clear_bit(FLG_OWN_BUSY, &l2->flag); | |
358 | clear_peer_busy(l2); | |
359 | } | |
360 | ||
361 | static int | |
362 | sethdraddr(struct layer2 *l2, u_char *header, int rsp) | |
363 | { | |
364 | u_char *ptr = header; | |
365 | int crbit = rsp; | |
366 | ||
367 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
368 | if (test_bit(FLG_LAPD_NET, &l2->flag)) | |
369 | crbit = !crbit; | |
370 | *ptr++ = (l2->sapi << 2) | (crbit ? 2 : 0); | |
371 | *ptr++ = (l2->tei << 1) | 1; | |
372 | return 2; | |
373 | } else { | |
374 | if (test_bit(FLG_ORIG, &l2->flag)) | |
375 | crbit = !crbit; | |
376 | if (crbit) | |
377 | *ptr++ = l2->addr.B; | |
378 | else | |
379 | *ptr++ = l2->addr.A; | |
380 | return 1; | |
381 | } | |
382 | } | |
383 | ||
384 | static inline void | |
385 | enqueue_super(struct layer2 *l2, struct sk_buff *skb) | |
386 | { | |
387 | if (l2down(l2, PH_DATA_REQ, l2_newid(l2), skb)) | |
388 | dev_kfree_skb(skb); | |
389 | } | |
390 | ||
391 | static inline void | |
392 | enqueue_ui(struct layer2 *l2, struct sk_buff *skb) | |
393 | { | |
394 | if (l2->tm) | |
395 | l2_tei(l2, MDL_STATUS_UI_IND, 0); | |
396 | if (l2down(l2, PH_DATA_REQ, l2_newid(l2), skb)) | |
397 | dev_kfree_skb(skb); | |
398 | } | |
399 | ||
400 | inline int | |
401 | IsUI(u_char *data) | |
402 | { | |
403 | return (data[0] & 0xef) == UI; | |
404 | } | |
405 | ||
406 | inline int | |
407 | IsUA(u_char *data) | |
408 | { | |
409 | return (data[0] & 0xef) == UA; | |
410 | } | |
411 | ||
412 | inline int | |
413 | IsDM(u_char *data) | |
414 | { | |
415 | return (data[0] & 0xef) == DM; | |
416 | } | |
417 | ||
418 | inline int | |
419 | IsDISC(u_char *data) | |
420 | { | |
421 | return (data[0] & 0xef) == DISC; | |
422 | } | |
423 | ||
424 | inline int | |
425 | IsRR(u_char *data, struct layer2 *l2) | |
426 | { | |
427 | if (test_bit(FLG_MOD128, &l2->flag)) | |
428 | return data[0] == RR; | |
429 | else | |
430 | return (data[0] & 0xf) == 1; | |
431 | } | |
432 | ||
433 | inline int | |
434 | IsSFrame(u_char *data, struct layer2 *l2) | |
435 | { | |
436 | register u_char d = *data; | |
437 | ||
438 | if (!test_bit(FLG_MOD128, &l2->flag)) | |
439 | d &= 0xf; | |
440 | return ((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c); | |
441 | } | |
442 | ||
443 | inline int | |
444 | IsSABME(u_char *data, struct layer2 *l2) | |
445 | { | |
446 | u_char d = data[0] & ~0x10; | |
447 | ||
448 | return test_bit(FLG_MOD128, &l2->flag) ? d == SABME : d == SABM; | |
449 | } | |
450 | ||
451 | inline int | |
452 | IsREJ(u_char *data, struct layer2 *l2) | |
453 | { | |
454 | return test_bit(FLG_MOD128, &l2->flag) ? | |
455 | data[0] == REJ : (data[0] & 0xf) == REJ; | |
456 | } | |
457 | ||
458 | inline int | |
459 | IsFRMR(u_char *data) | |
460 | { | |
461 | return (data[0] & 0xef) == FRMR; | |
462 | } | |
463 | ||
464 | inline int | |
465 | IsRNR(u_char *data, struct layer2 *l2) | |
466 | { | |
467 | return test_bit(FLG_MOD128, &l2->flag) ? | |
468 | data[0] == RNR : (data[0] & 0xf) == RNR; | |
469 | } | |
470 | ||
5b834354 | 471 | static int |
1b2b03f8 KK |
472 | iframe_error(struct layer2 *l2, struct sk_buff *skb) |
473 | { | |
474 | u_int i; | |
475 | int rsp = *skb->data & 0x2; | |
476 | ||
477 | i = l2addrsize(l2) + (test_bit(FLG_MOD128, &l2->flag) ? 2 : 1); | |
478 | if (test_bit(FLG_ORIG, &l2->flag)) | |
479 | rsp = !rsp; | |
480 | if (rsp) | |
481 | return 'L'; | |
482 | if (skb->len < i) | |
483 | return 'N'; | |
484 | if ((skb->len - i) > l2->maxlen) | |
485 | return 'O'; | |
486 | return 0; | |
487 | } | |
488 | ||
5b834354 | 489 | static int |
1b2b03f8 KK |
490 | super_error(struct layer2 *l2, struct sk_buff *skb) |
491 | { | |
492 | if (skb->len != l2addrsize(l2) + | |
493 | (test_bit(FLG_MOD128, &l2->flag) ? 2 : 1)) | |
494 | return 'N'; | |
495 | return 0; | |
496 | } | |
497 | ||
5b834354 | 498 | static int |
1b2b03f8 KK |
499 | unnum_error(struct layer2 *l2, struct sk_buff *skb, int wantrsp) |
500 | { | |
501 | int rsp = (*skb->data & 0x2) >> 1; | |
502 | if (test_bit(FLG_ORIG, &l2->flag)) | |
503 | rsp = !rsp; | |
504 | if (rsp != wantrsp) | |
505 | return 'L'; | |
506 | if (skb->len != l2addrsize(l2) + 1) | |
507 | return 'N'; | |
508 | return 0; | |
509 | } | |
510 | ||
5b834354 | 511 | static int |
1b2b03f8 KK |
512 | UI_error(struct layer2 *l2, struct sk_buff *skb) |
513 | { | |
514 | int rsp = *skb->data & 0x2; | |
515 | if (test_bit(FLG_ORIG, &l2->flag)) | |
516 | rsp = !rsp; | |
517 | if (rsp) | |
518 | return 'L'; | |
519 | if (skb->len > l2->maxlen + l2addrsize(l2) + 1) | |
520 | return 'O'; | |
521 | return 0; | |
522 | } | |
523 | ||
5b834354 | 524 | static int |
1b2b03f8 KK |
525 | FRMR_error(struct layer2 *l2, struct sk_buff *skb) |
526 | { | |
527 | u_int headers = l2addrsize(l2) + 1; | |
528 | u_char *datap = skb->data + headers; | |
529 | int rsp = *skb->data & 0x2; | |
530 | ||
531 | if (test_bit(FLG_ORIG, &l2->flag)) | |
532 | rsp = !rsp; | |
533 | if (!rsp) | |
534 | return 'L'; | |
535 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
536 | if (skb->len < headers + 5) | |
537 | return 'N'; | |
538 | else if (*debug & DEBUG_L2) | |
539 | l2m_debug(&l2->l2m, | |
540 | "FRMR information %2x %2x %2x %2x %2x", | |
541 | datap[0], datap[1], datap[2], datap[3], datap[4]); | |
542 | } else { | |
543 | if (skb->len < headers + 3) | |
544 | return 'N'; | |
545 | else if (*debug & DEBUG_L2) | |
546 | l2m_debug(&l2->l2m, | |
547 | "FRMR information %2x %2x %2x", | |
548 | datap[0], datap[1], datap[2]); | |
549 | } | |
550 | return 0; | |
551 | } | |
552 | ||
553 | static unsigned int | |
554 | legalnr(struct layer2 *l2, unsigned int nr) | |
555 | { | |
556 | if (test_bit(FLG_MOD128, &l2->flag)) | |
557 | return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128); | |
558 | else | |
559 | return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8); | |
560 | } | |
561 | ||
562 | static void | |
563 | setva(struct layer2 *l2, unsigned int nr) | |
564 | { | |
565 | struct sk_buff *skb; | |
566 | ||
567 | while (l2->va != nr) { | |
568 | l2->va++; | |
569 | if (test_bit(FLG_MOD128, &l2->flag)) | |
570 | l2->va %= 128; | |
571 | else | |
572 | l2->va %= 8; | |
573 | if (l2->windowar[l2->sow]) { | |
574 | skb_trim(l2->windowar[l2->sow], 0); | |
575 | skb_queue_tail(&l2->tmp_queue, l2->windowar[l2->sow]); | |
576 | l2->windowar[l2->sow] = NULL; | |
577 | } | |
578 | l2->sow = (l2->sow + 1) % l2->window; | |
579 | } | |
580 | skb = skb_dequeue(&l2->tmp_queue); | |
581 | while (skb) { | |
582 | dev_kfree_skb(skb); | |
583 | skb = skb_dequeue(&l2->tmp_queue); | |
584 | } | |
585 | } | |
586 | ||
587 | static void | |
588 | send_uframe(struct layer2 *l2, struct sk_buff *skb, u_char cmd, u_char cr) | |
589 | { | |
590 | u_char tmp[MAX_L2HEADER_LEN]; | |
591 | int i; | |
592 | ||
593 | i = sethdraddr(l2, tmp, cr); | |
594 | tmp[i++] = cmd; | |
595 | if (skb) | |
596 | skb_trim(skb, 0); | |
597 | else { | |
598 | skb = mI_alloc_skb(i, GFP_ATOMIC); | |
599 | if (!skb) { | |
600 | printk(KERN_WARNING "%s: can't alloc skbuff\n", | |
601 | __func__); | |
602 | return; | |
603 | } | |
604 | } | |
605 | memcpy(skb_put(skb, i), tmp, i); | |
606 | enqueue_super(l2, skb); | |
607 | } | |
608 | ||
609 | ||
610 | inline u_char | |
611 | get_PollFlag(struct layer2 *l2, struct sk_buff *skb) | |
612 | { | |
613 | return skb->data[l2addrsize(l2)] & 0x10; | |
614 | } | |
615 | ||
616 | inline u_char | |
617 | get_PollFlagFree(struct layer2 *l2, struct sk_buff *skb) | |
618 | { | |
619 | u_char PF; | |
620 | ||
621 | PF = get_PollFlag(l2, skb); | |
622 | dev_kfree_skb(skb); | |
623 | return PF; | |
624 | } | |
625 | ||
626 | inline void | |
627 | start_t200(struct layer2 *l2, int i) | |
628 | { | |
629 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, i); | |
630 | test_and_set_bit(FLG_T200_RUN, &l2->flag); | |
631 | } | |
632 | ||
633 | inline void | |
634 | restart_t200(struct layer2 *l2, int i) | |
635 | { | |
636 | mISDN_FsmRestartTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, i); | |
637 | test_and_set_bit(FLG_T200_RUN, &l2->flag); | |
638 | } | |
639 | ||
640 | inline void | |
641 | stop_t200(struct layer2 *l2, int i) | |
642 | { | |
643 | if (test_and_clear_bit(FLG_T200_RUN, &l2->flag)) | |
644 | mISDN_FsmDelTimer(&l2->t200, i); | |
645 | } | |
646 | ||
647 | inline void | |
648 | st5_dl_release_l2l3(struct layer2 *l2) | |
649 | { | |
650 | int pr; | |
651 | ||
652 | if (test_and_clear_bit(FLG_PEND_REL, &l2->flag)) | |
653 | pr = DL_RELEASE_CNF; | |
654 | else | |
655 | pr = DL_RELEASE_IND; | |
656 | l2up_create(l2, pr, 0, NULL); | |
657 | } | |
658 | ||
659 | inline void | |
660 | lapb_dl_release_l2l3(struct layer2 *l2, int f) | |
661 | { | |
662 | if (test_bit(FLG_LAPB, &l2->flag)) | |
663 | l2down_create(l2, PH_DEACTIVATE_REQ, l2_newid(l2), 0, NULL); | |
664 | l2up_create(l2, f, 0, NULL); | |
665 | } | |
666 | ||
667 | static void | |
668 | establishlink(struct FsmInst *fi) | |
669 | { | |
670 | struct layer2 *l2 = fi->userdata; | |
671 | u_char cmd; | |
672 | ||
673 | clear_exception(l2); | |
674 | l2->rc = 0; | |
675 | cmd = (test_bit(FLG_MOD128, &l2->flag) ? SABME : SABM) | 0x10; | |
676 | send_uframe(l2, NULL, cmd, CMD); | |
677 | mISDN_FsmDelTimer(&l2->t203, 1); | |
678 | restart_t200(l2, 1); | |
679 | test_and_clear_bit(FLG_PEND_REL, &l2->flag); | |
680 | freewin(l2); | |
681 | mISDN_FsmChangeState(fi, ST_L2_5); | |
682 | } | |
683 | ||
684 | static void | |
685 | l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg) | |
686 | { | |
687 | struct sk_buff *skb = arg; | |
688 | struct layer2 *l2 = fi->userdata; | |
689 | ||
690 | if (get_PollFlagFree(l2, skb)) | |
691 | l2mgr(l2, MDL_ERROR_IND, (void *) 'C'); | |
692 | else | |
693 | l2mgr(l2, MDL_ERROR_IND, (void *) 'D'); | |
694 | ||
695 | } | |
696 | ||
697 | static void | |
698 | l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg) | |
699 | { | |
700 | struct sk_buff *skb = arg; | |
701 | struct layer2 *l2 = fi->userdata; | |
702 | ||
703 | if (get_PollFlagFree(l2, skb)) | |
704 | l2mgr(l2, MDL_ERROR_IND, (void *) 'B'); | |
705 | else { | |
706 | l2mgr(l2, MDL_ERROR_IND, (void *) 'E'); | |
707 | establishlink(fi); | |
708 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
709 | } | |
710 | } | |
711 | ||
712 | static void | |
713 | l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg) | |
714 | { | |
715 | struct sk_buff *skb = arg; | |
716 | struct layer2 *l2 = fi->userdata; | |
717 | ||
718 | if (get_PollFlagFree(l2, skb)) | |
719 | l2mgr(l2, MDL_ERROR_IND, (void *) 'B'); | |
720 | else | |
721 | l2mgr(l2, MDL_ERROR_IND, (void *) 'E'); | |
722 | establishlink(fi); | |
723 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
724 | } | |
725 | ||
726 | static void | |
727 | l2_go_st3(struct FsmInst *fi, int event, void *arg) | |
728 | { | |
729 | dev_kfree_skb((struct sk_buff *)arg); | |
730 | mISDN_FsmChangeState(fi, ST_L2_3); | |
731 | } | |
732 | ||
733 | static void | |
734 | l2_mdl_assign(struct FsmInst *fi, int event, void *arg) | |
735 | { | |
736 | struct layer2 *l2 = fi->userdata; | |
737 | ||
738 | mISDN_FsmChangeState(fi, ST_L2_3); | |
739 | dev_kfree_skb((struct sk_buff *)arg); | |
740 | l2_tei(l2, MDL_ASSIGN_IND, 0); | |
741 | } | |
742 | ||
743 | static void | |
744 | l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg) | |
745 | { | |
746 | struct layer2 *l2 = fi->userdata; | |
747 | struct sk_buff *skb = arg; | |
748 | ||
749 | skb_queue_tail(&l2->ui_queue, skb); | |
750 | mISDN_FsmChangeState(fi, ST_L2_2); | |
751 | l2_tei(l2, MDL_ASSIGN_IND, 0); | |
752 | } | |
753 | ||
754 | static void | |
755 | l2_queue_ui(struct FsmInst *fi, int event, void *arg) | |
756 | { | |
757 | struct layer2 *l2 = fi->userdata; | |
758 | struct sk_buff *skb = arg; | |
759 | ||
760 | skb_queue_tail(&l2->ui_queue, skb); | |
761 | } | |
762 | ||
763 | static void | |
764 | tx_ui(struct layer2 *l2) | |
765 | { | |
766 | struct sk_buff *skb; | |
767 | u_char header[MAX_L2HEADER_LEN]; | |
768 | int i; | |
769 | ||
770 | i = sethdraddr(l2, header, CMD); | |
771 | if (test_bit(FLG_LAPD_NET, &l2->flag)) | |
772 | header[1] = 0xff; /* tei 127 */ | |
773 | header[i++] = UI; | |
774 | while ((skb = skb_dequeue(&l2->ui_queue))) { | |
775 | memcpy(skb_push(skb, i), header, i); | |
776 | enqueue_ui(l2, skb); | |
777 | } | |
778 | } | |
779 | ||
780 | static void | |
781 | l2_send_ui(struct FsmInst *fi, int event, void *arg) | |
782 | { | |
783 | struct layer2 *l2 = fi->userdata; | |
784 | struct sk_buff *skb = arg; | |
785 | ||
786 | skb_queue_tail(&l2->ui_queue, skb); | |
787 | tx_ui(l2); | |
788 | } | |
789 | ||
790 | static void | |
791 | l2_got_ui(struct FsmInst *fi, int event, void *arg) | |
792 | { | |
793 | struct layer2 *l2 = fi->userdata; | |
794 | struct sk_buff *skb = arg; | |
795 | ||
796 | skb_pull(skb, l2headersize(l2, 1)); | |
797 | /* | |
798 | * in states 1-3 for broadcast | |
799 | */ | |
800 | ||
801 | if (l2->tm) | |
802 | l2_tei(l2, MDL_STATUS_UI_IND, 0); | |
803 | l2up(l2, DL_UNITDATA_IND, skb); | |
804 | } | |
805 | ||
806 | static void | |
807 | l2_establish(struct FsmInst *fi, int event, void *arg) | |
808 | { | |
809 | struct sk_buff *skb = arg; | |
810 | struct layer2 *l2 = fi->userdata; | |
811 | ||
812 | establishlink(fi); | |
813 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
814 | dev_kfree_skb(skb); | |
815 | } | |
816 | ||
817 | static void | |
818 | l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg) | |
819 | { | |
820 | struct sk_buff *skb = arg; | |
821 | struct layer2 *l2 = fi->userdata; | |
822 | ||
823 | skb_queue_purge(&l2->i_queue); | |
824 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
825 | test_and_clear_bit(FLG_PEND_REL, &l2->flag); | |
826 | dev_kfree_skb(skb); | |
827 | } | |
828 | ||
829 | static void | |
830 | l2_l3_reestablish(struct FsmInst *fi, int event, void *arg) | |
831 | { | |
832 | struct sk_buff *skb = arg; | |
833 | struct layer2 *l2 = fi->userdata; | |
834 | ||
835 | skb_queue_purge(&l2->i_queue); | |
836 | establishlink(fi); | |
837 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
838 | dev_kfree_skb(skb); | |
839 | } | |
840 | ||
841 | static void | |
842 | l2_release(struct FsmInst *fi, int event, void *arg) | |
843 | { | |
844 | struct layer2 *l2 = fi->userdata; | |
845 | struct sk_buff *skb = arg; | |
846 | ||
847 | skb_trim(skb, 0); | |
848 | l2up(l2, DL_RELEASE_CNF, skb); | |
849 | } | |
850 | ||
851 | static void | |
852 | l2_pend_rel(struct FsmInst *fi, int event, void *arg) | |
853 | { | |
854 | struct sk_buff *skb = arg; | |
855 | struct layer2 *l2 = fi->userdata; | |
856 | ||
857 | test_and_set_bit(FLG_PEND_REL, &l2->flag); | |
858 | dev_kfree_skb(skb); | |
859 | } | |
860 | ||
861 | static void | |
862 | l2_disconnect(struct FsmInst *fi, int event, void *arg) | |
863 | { | |
864 | struct layer2 *l2 = fi->userdata; | |
865 | struct sk_buff *skb = arg; | |
866 | ||
867 | skb_queue_purge(&l2->i_queue); | |
868 | freewin(l2); | |
869 | mISDN_FsmChangeState(fi, ST_L2_6); | |
870 | l2->rc = 0; | |
871 | send_uframe(l2, NULL, DISC | 0x10, CMD); | |
872 | mISDN_FsmDelTimer(&l2->t203, 1); | |
873 | restart_t200(l2, 2); | |
874 | if (skb) | |
875 | dev_kfree_skb(skb); | |
876 | } | |
877 | ||
878 | static void | |
879 | l2_start_multi(struct FsmInst *fi, int event, void *arg) | |
880 | { | |
881 | struct layer2 *l2 = fi->userdata; | |
882 | struct sk_buff *skb = arg; | |
883 | ||
884 | l2->vs = 0; | |
885 | l2->va = 0; | |
886 | l2->vr = 0; | |
887 | l2->sow = 0; | |
888 | clear_exception(l2); | |
889 | send_uframe(l2, NULL, UA | get_PollFlag(l2, skb), RSP); | |
890 | mISDN_FsmChangeState(fi, ST_L2_7); | |
891 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 3); | |
892 | skb_trim(skb, 0); | |
893 | l2up(l2, DL_ESTABLISH_IND, skb); | |
894 | if (l2->tm) | |
895 | l2_tei(l2, MDL_STATUS_UP_IND, 0); | |
896 | } | |
897 | ||
898 | static void | |
899 | l2_send_UA(struct FsmInst *fi, int event, void *arg) | |
900 | { | |
901 | struct layer2 *l2 = fi->userdata; | |
902 | struct sk_buff *skb = arg; | |
903 | ||
904 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); | |
905 | } | |
906 | ||
907 | static void | |
908 | l2_send_DM(struct FsmInst *fi, int event, void *arg) | |
909 | { | |
910 | struct layer2 *l2 = fi->userdata; | |
911 | struct sk_buff *skb = arg; | |
912 | ||
913 | send_uframe(l2, skb, DM | get_PollFlag(l2, skb), RSP); | |
914 | } | |
915 | ||
916 | static void | |
917 | l2_restart_multi(struct FsmInst *fi, int event, void *arg) | |
918 | { | |
919 | struct layer2 *l2 = fi->userdata; | |
920 | struct sk_buff *skb = arg; | |
921 | int est = 0; | |
922 | ||
923 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); | |
924 | ||
925 | l2mgr(l2, MDL_ERROR_IND, (void *) 'F'); | |
926 | ||
927 | if (l2->vs != l2->va) { | |
928 | skb_queue_purge(&l2->i_queue); | |
929 | est = 1; | |
930 | } | |
931 | ||
932 | clear_exception(l2); | |
933 | l2->vs = 0; | |
934 | l2->va = 0; | |
935 | l2->vr = 0; | |
936 | l2->sow = 0; | |
937 | mISDN_FsmChangeState(fi, ST_L2_7); | |
938 | stop_t200(l2, 3); | |
939 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 3); | |
940 | ||
941 | if (est) | |
942 | l2up_create(l2, DL_ESTABLISH_IND, 0, NULL); | |
943 | /* mISDN_queue_data(&l2->inst, l2->inst.id | MSG_BROADCAST, | |
944 | * MGR_SHORTSTATUS | INDICATION, SSTATUS_L2_ESTABLISHED, | |
945 | * 0, NULL, 0); | |
946 | */ | |
947 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) | |
948 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
949 | } | |
950 | ||
951 | static void | |
952 | l2_stop_multi(struct FsmInst *fi, int event, void *arg) | |
953 | { | |
954 | struct layer2 *l2 = fi->userdata; | |
955 | struct sk_buff *skb = arg; | |
956 | ||
957 | mISDN_FsmChangeState(fi, ST_L2_4); | |
958 | mISDN_FsmDelTimer(&l2->t203, 3); | |
959 | stop_t200(l2, 4); | |
960 | ||
961 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); | |
962 | skb_queue_purge(&l2->i_queue); | |
963 | freewin(l2); | |
964 | lapb_dl_release_l2l3(l2, DL_RELEASE_IND); | |
965 | if (l2->tm) | |
966 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
967 | } | |
968 | ||
969 | static void | |
970 | l2_connected(struct FsmInst *fi, int event, void *arg) | |
971 | { | |
972 | struct layer2 *l2 = fi->userdata; | |
973 | struct sk_buff *skb = arg; | |
974 | int pr = -1; | |
975 | ||
976 | if (!get_PollFlag(l2, skb)) { | |
977 | l2_mdl_error_ua(fi, event, arg); | |
978 | return; | |
979 | } | |
980 | dev_kfree_skb(skb); | |
981 | if (test_and_clear_bit(FLG_PEND_REL, &l2->flag)) | |
982 | l2_disconnect(fi, event, NULL); | |
983 | if (test_and_clear_bit(FLG_L3_INIT, &l2->flag)) { | |
984 | pr = DL_ESTABLISH_CNF; | |
985 | } else if (l2->vs != l2->va) { | |
986 | skb_queue_purge(&l2->i_queue); | |
987 | pr = DL_ESTABLISH_IND; | |
988 | } | |
989 | stop_t200(l2, 5); | |
990 | l2->vr = 0; | |
991 | l2->vs = 0; | |
992 | l2->va = 0; | |
993 | l2->sow = 0; | |
994 | mISDN_FsmChangeState(fi, ST_L2_7); | |
995 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 4); | |
996 | if (pr != -1) | |
997 | l2up_create(l2, pr, 0, NULL); | |
998 | ||
999 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) | |
1000 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1001 | ||
1002 | if (l2->tm) | |
1003 | l2_tei(l2, MDL_STATUS_UP_IND, 0); | |
1004 | } | |
1005 | ||
1006 | static void | |
1007 | l2_released(struct FsmInst *fi, int event, void *arg) | |
1008 | { | |
1009 | struct layer2 *l2 = fi->userdata; | |
1010 | struct sk_buff *skb = arg; | |
1011 | ||
1012 | if (!get_PollFlag(l2, skb)) { | |
1013 | l2_mdl_error_ua(fi, event, arg); | |
1014 | return; | |
1015 | } | |
1016 | dev_kfree_skb(skb); | |
1017 | stop_t200(l2, 6); | |
1018 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); | |
1019 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1020 | if (l2->tm) | |
1021 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1022 | } | |
1023 | ||
1024 | static void | |
1025 | l2_reestablish(struct FsmInst *fi, int event, void *arg) | |
1026 | { | |
1027 | struct layer2 *l2 = fi->userdata; | |
1028 | struct sk_buff *skb = arg; | |
1029 | ||
1030 | if (!get_PollFlagFree(l2, skb)) { | |
1031 | establishlink(fi); | |
1032 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | static void | |
1037 | l2_st5_dm_release(struct FsmInst *fi, int event, void *arg) | |
1038 | { | |
1039 | struct layer2 *l2 = fi->userdata; | |
1040 | struct sk_buff *skb = arg; | |
1041 | ||
1042 | if (get_PollFlagFree(l2, skb)) { | |
1043 | stop_t200(l2, 7); | |
1044 | if (!test_bit(FLG_L3_INIT, &l2->flag)) | |
1045 | skb_queue_purge(&l2->i_queue); | |
1046 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1047 | l2down_create(l2, PH_DEACTIVATE_REQ, | |
1048 | l2_newid(l2), 0, NULL); | |
1049 | st5_dl_release_l2l3(l2); | |
1050 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1051 | if (l2->tm) | |
1052 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1053 | } | |
1054 | } | |
1055 | ||
1056 | static void | |
1057 | l2_st6_dm_release(struct FsmInst *fi, int event, void *arg) | |
1058 | { | |
1059 | struct layer2 *l2 = fi->userdata; | |
1060 | struct sk_buff *skb = arg; | |
1061 | ||
1062 | if (get_PollFlagFree(l2, skb)) { | |
1063 | stop_t200(l2, 8); | |
1064 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); | |
1065 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1066 | if (l2->tm) | |
1067 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1068 | } | |
1069 | } | |
1070 | ||
5b834354 | 1071 | static void |
1b2b03f8 KK |
1072 | enquiry_cr(struct layer2 *l2, u_char typ, u_char cr, u_char pf) |
1073 | { | |
1074 | struct sk_buff *skb; | |
1075 | u_char tmp[MAX_L2HEADER_LEN]; | |
1076 | int i; | |
1077 | ||
1078 | i = sethdraddr(l2, tmp, cr); | |
1079 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1080 | tmp[i++] = typ; | |
1081 | tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0); | |
1082 | } else | |
1083 | tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0); | |
1084 | skb = mI_alloc_skb(i, GFP_ATOMIC); | |
1085 | if (!skb) { | |
1086 | printk(KERN_WARNING | |
1087 | "isdnl2 can't alloc sbbuff for enquiry_cr\n"); | |
1088 | return; | |
1089 | } | |
1090 | memcpy(skb_put(skb, i), tmp, i); | |
1091 | enqueue_super(l2, skb); | |
1092 | } | |
1093 | ||
1094 | inline void | |
1095 | enquiry_response(struct layer2 *l2) | |
1096 | { | |
1097 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) | |
1098 | enquiry_cr(l2, RNR, RSP, 1); | |
1099 | else | |
1100 | enquiry_cr(l2, RR, RSP, 1); | |
1101 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1102 | } | |
1103 | ||
1104 | inline void | |
1105 | transmit_enquiry(struct layer2 *l2) | |
1106 | { | |
1107 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) | |
1108 | enquiry_cr(l2, RNR, CMD, 1); | |
1109 | else | |
1110 | enquiry_cr(l2, RR, CMD, 1); | |
1111 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1112 | start_t200(l2, 9); | |
1113 | } | |
1114 | ||
1115 | ||
1116 | static void | |
1117 | nrerrorrecovery(struct FsmInst *fi) | |
1118 | { | |
1119 | struct layer2 *l2 = fi->userdata; | |
1120 | ||
1121 | l2mgr(l2, MDL_ERROR_IND, (void *) 'J'); | |
1122 | establishlink(fi); | |
1123 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1124 | } | |
1125 | ||
1126 | static void | |
1127 | invoke_retransmission(struct layer2 *l2, unsigned int nr) | |
1128 | { | |
1129 | u_int p1; | |
1130 | ||
1131 | if (l2->vs != nr) { | |
1132 | while (l2->vs != nr) { | |
1133 | (l2->vs)--; | |
1134 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1135 | l2->vs %= 128; | |
1136 | p1 = (l2->vs - l2->va) % 128; | |
1137 | } else { | |
1138 | l2->vs %= 8; | |
1139 | p1 = (l2->vs - l2->va) % 8; | |
1140 | } | |
1141 | p1 = (p1 + l2->sow) % l2->window; | |
1142 | if (l2->windowar[p1]) | |
1143 | skb_queue_head(&l2->i_queue, l2->windowar[p1]); | |
1144 | else | |
1145 | printk(KERN_WARNING | |
1146 | "%s: windowar[%d] is NULL\n", | |
1147 | __func__, p1); | |
1148 | l2->windowar[p1] = NULL; | |
1149 | } | |
1150 | mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL); | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | static void | |
1155 | l2_st7_got_super(struct FsmInst *fi, int event, void *arg) | |
1156 | { | |
1157 | struct layer2 *l2 = fi->userdata; | |
1158 | struct sk_buff *skb = arg; | |
1159 | int PollFlag, rsp, typ = RR; | |
1160 | unsigned int nr; | |
1161 | ||
1162 | rsp = *skb->data & 0x2; | |
1163 | if (test_bit(FLG_ORIG, &l2->flag)) | |
1164 | rsp = !rsp; | |
1165 | ||
1166 | skb_pull(skb, l2addrsize(l2)); | |
1167 | if (IsRNR(skb->data, l2)) { | |
1168 | set_peer_busy(l2); | |
1169 | typ = RNR; | |
1170 | } else | |
1171 | clear_peer_busy(l2); | |
1172 | if (IsREJ(skb->data, l2)) | |
1173 | typ = REJ; | |
1174 | ||
1175 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1176 | PollFlag = (skb->data[1] & 0x1) == 0x1; | |
1177 | nr = skb->data[1] >> 1; | |
1178 | } else { | |
1179 | PollFlag = (skb->data[0] & 0x10); | |
1180 | nr = (skb->data[0] >> 5) & 0x7; | |
1181 | } | |
1182 | dev_kfree_skb(skb); | |
1183 | ||
1184 | if (PollFlag) { | |
1185 | if (rsp) | |
1186 | l2mgr(l2, MDL_ERROR_IND, (void *) 'A'); | |
1187 | else | |
1188 | enquiry_response(l2); | |
1189 | } | |
1190 | if (legalnr(l2, nr)) { | |
1191 | if (typ == REJ) { | |
1192 | setva(l2, nr); | |
1193 | invoke_retransmission(l2, nr); | |
1194 | stop_t200(l2, 10); | |
1195 | if (mISDN_FsmAddTimer(&l2->t203, l2->T203, | |
1196 | EV_L2_T203, NULL, 6)) | |
1197 | l2m_debug(&l2->l2m, "Restart T203 ST7 REJ"); | |
1198 | } else if ((nr == l2->vs) && (typ == RR)) { | |
1199 | setva(l2, nr); | |
1200 | stop_t200(l2, 11); | |
1201 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, | |
1202 | EV_L2_T203, NULL, 7); | |
1203 | } else if ((l2->va != nr) || (typ == RNR)) { | |
1204 | setva(l2, nr); | |
1205 | if (typ != RR) | |
1206 | mISDN_FsmDelTimer(&l2->t203, 9); | |
1207 | restart_t200(l2, 12); | |
1208 | } | |
1209 | if (skb_queue_len(&l2->i_queue) && (typ == RR)) | |
1210 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1211 | } else | |
1212 | nrerrorrecovery(fi); | |
1213 | } | |
1214 | ||
1215 | static void | |
1216 | l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg) | |
1217 | { | |
1218 | struct layer2 *l2 = fi->userdata; | |
1219 | struct sk_buff *skb = arg; | |
1220 | ||
1221 | if (!test_bit(FLG_L3_INIT, &l2->flag)) | |
1222 | skb_queue_tail(&l2->i_queue, skb); | |
1223 | else | |
1224 | dev_kfree_skb(skb); | |
1225 | } | |
1226 | ||
1227 | static void | |
1228 | l2_feed_i_pull(struct FsmInst *fi, int event, void *arg) | |
1229 | { | |
1230 | struct layer2 *l2 = fi->userdata; | |
1231 | struct sk_buff *skb = arg; | |
1232 | ||
1233 | skb_queue_tail(&l2->i_queue, skb); | |
1234 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1235 | } | |
1236 | ||
1237 | static void | |
1238 | l2_feed_iqueue(struct FsmInst *fi, int event, void *arg) | |
1239 | { | |
1240 | struct layer2 *l2 = fi->userdata; | |
1241 | struct sk_buff *skb = arg; | |
1242 | ||
1243 | skb_queue_tail(&l2->i_queue, skb); | |
1244 | } | |
1245 | ||
1246 | static void | |
1247 | l2_got_iframe(struct FsmInst *fi, int event, void *arg) | |
1248 | { | |
1249 | struct layer2 *l2 = fi->userdata; | |
1250 | struct sk_buff *skb = arg; | |
1251 | int PollFlag, i; | |
1252 | u_int ns, nr; | |
1253 | ||
1254 | i = l2addrsize(l2); | |
1255 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1256 | PollFlag = ((skb->data[i + 1] & 0x1) == 0x1); | |
1257 | ns = skb->data[i] >> 1; | |
1258 | nr = (skb->data[i + 1] >> 1) & 0x7f; | |
1259 | } else { | |
1260 | PollFlag = (skb->data[i] & 0x10); | |
1261 | ns = (skb->data[i] >> 1) & 0x7; | |
1262 | nr = (skb->data[i] >> 5) & 0x7; | |
1263 | } | |
1264 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) { | |
1265 | dev_kfree_skb(skb); | |
1266 | if (PollFlag) | |
1267 | enquiry_response(l2); | |
1268 | } else { | |
1269 | if (l2->vr == ns) { | |
1270 | l2->vr++; | |
1271 | if (test_bit(FLG_MOD128, &l2->flag)) | |
1272 | l2->vr %= 128; | |
1273 | else | |
1274 | l2->vr %= 8; | |
1275 | test_and_clear_bit(FLG_REJEXC, &l2->flag); | |
1276 | if (PollFlag) | |
1277 | enquiry_response(l2); | |
1278 | else | |
1279 | test_and_set_bit(FLG_ACK_PEND, &l2->flag); | |
1280 | skb_pull(skb, l2headersize(l2, 0)); | |
1281 | l2up(l2, DL_DATA_IND, skb); | |
1282 | } else { | |
1283 | /* n(s)!=v(r) */ | |
1284 | dev_kfree_skb(skb); | |
1285 | if (test_and_set_bit(FLG_REJEXC, &l2->flag)) { | |
1286 | if (PollFlag) | |
1287 | enquiry_response(l2); | |
1288 | } else { | |
1289 | enquiry_cr(l2, REJ, RSP, PollFlag); | |
1290 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1291 | } | |
1292 | } | |
1293 | } | |
1294 | if (legalnr(l2, nr)) { | |
1295 | if (!test_bit(FLG_PEER_BUSY, &l2->flag) && | |
1296 | (fi->state == ST_L2_7)) { | |
1297 | if (nr == l2->vs) { | |
1298 | stop_t200(l2, 13); | |
1299 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, | |
1300 | EV_L2_T203, NULL, 7); | |
1301 | } else if (nr != l2->va) | |
1302 | restart_t200(l2, 14); | |
1303 | } | |
1304 | setva(l2, nr); | |
1305 | } else { | |
1306 | nrerrorrecovery(fi); | |
1307 | return; | |
1308 | } | |
1309 | if (skb_queue_len(&l2->i_queue) && (fi->state == ST_L2_7)) | |
1310 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1311 | if (test_and_clear_bit(FLG_ACK_PEND, &l2->flag)) | |
1312 | enquiry_cr(l2, RR, RSP, 0); | |
1313 | } | |
1314 | ||
1315 | static void | |
1316 | l2_got_tei(struct FsmInst *fi, int event, void *arg) | |
1317 | { | |
1318 | struct layer2 *l2 = fi->userdata; | |
1319 | u_int info; | |
1320 | ||
1321 | l2->tei = (signed char)(long)arg; | |
1322 | set_channel_address(&l2->ch, l2->sapi, l2->tei); | |
1323 | info = DL_INFO_L2_CONNECT; | |
1324 | l2up_create(l2, DL_INFORMATION_IND, sizeof(info), &info); | |
1325 | if (fi->state == ST_L2_3) { | |
1326 | establishlink(fi); | |
1327 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
1328 | } else | |
1329 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1330 | if (skb_queue_len(&l2->ui_queue)) | |
1331 | tx_ui(l2); | |
1332 | } | |
1333 | ||
1334 | static void | |
1335 | l2_st5_tout_200(struct FsmInst *fi, int event, void *arg) | |
1336 | { | |
1337 | struct layer2 *l2 = fi->userdata; | |
1338 | ||
1339 | if (test_bit(FLG_LAPD, &l2->flag) && | |
1340 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { | |
1341 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); | |
1342 | } else if (l2->rc == l2->N200) { | |
1343 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1344 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1345 | skb_queue_purge(&l2->i_queue); | |
1346 | l2mgr(l2, MDL_ERROR_IND, (void *) 'G'); | |
1347 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1348 | l2down_create(l2, PH_DEACTIVATE_REQ, | |
1349 | l2_newid(l2), 0, NULL); | |
1350 | st5_dl_release_l2l3(l2); | |
1351 | if (l2->tm) | |
1352 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1353 | } else { | |
1354 | l2->rc++; | |
1355 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); | |
1356 | send_uframe(l2, NULL, (test_bit(FLG_MOD128, &l2->flag) ? | |
1357 | SABME : SABM) | 0x10, CMD); | |
1358 | } | |
1359 | } | |
1360 | ||
1361 | static void | |
1362 | l2_st6_tout_200(struct FsmInst *fi, int event, void *arg) | |
1363 | { | |
1364 | struct layer2 *l2 = fi->userdata; | |
1365 | ||
1366 | if (test_bit(FLG_LAPD, &l2->flag) && | |
1367 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { | |
1368 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); | |
1369 | } else if (l2->rc == l2->N200) { | |
1370 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1371 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1372 | l2mgr(l2, MDL_ERROR_IND, (void *) 'H'); | |
1373 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); | |
1374 | if (l2->tm) | |
1375 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1376 | } else { | |
1377 | l2->rc++; | |
1378 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, | |
1379 | NULL, 9); | |
1380 | send_uframe(l2, NULL, DISC | 0x10, CMD); | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | static void | |
1385 | l2_st7_tout_200(struct FsmInst *fi, int event, void *arg) | |
1386 | { | |
1387 | struct layer2 *l2 = fi->userdata; | |
1388 | ||
1389 | if (test_bit(FLG_LAPD, &l2->flag) && | |
1390 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { | |
1391 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); | |
1392 | return; | |
1393 | } | |
1394 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1395 | l2->rc = 0; | |
1396 | mISDN_FsmChangeState(fi, ST_L2_8); | |
1397 | transmit_enquiry(l2); | |
1398 | l2->rc++; | |
1399 | } | |
1400 | ||
1401 | static void | |
1402 | l2_st8_tout_200(struct FsmInst *fi, int event, void *arg) | |
1403 | { | |
1404 | struct layer2 *l2 = fi->userdata; | |
1405 | ||
1406 | if (test_bit(FLG_LAPD, &l2->flag) && | |
1407 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { | |
1408 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); | |
1409 | return; | |
1410 | } | |
1411 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1412 | if (l2->rc == l2->N200) { | |
1413 | l2mgr(l2, MDL_ERROR_IND, (void *) 'I'); | |
1414 | establishlink(fi); | |
1415 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1416 | } else { | |
1417 | transmit_enquiry(l2); | |
1418 | l2->rc++; | |
1419 | } | |
1420 | } | |
1421 | ||
1422 | static void | |
1423 | l2_st7_tout_203(struct FsmInst *fi, int event, void *arg) | |
1424 | { | |
1425 | struct layer2 *l2 = fi->userdata; | |
1426 | ||
1427 | if (test_bit(FLG_LAPD, &l2->flag) && | |
1428 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { | |
1429 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 9); | |
1430 | return; | |
1431 | } | |
1432 | mISDN_FsmChangeState(fi, ST_L2_8); | |
1433 | transmit_enquiry(l2); | |
1434 | l2->rc = 0; | |
1435 | } | |
1436 | ||
1437 | static void | |
1438 | l2_pull_iqueue(struct FsmInst *fi, int event, void *arg) | |
1439 | { | |
1440 | struct layer2 *l2 = fi->userdata; | |
1441 | struct sk_buff *skb, *nskb, *oskb; | |
1442 | u_char header[MAX_L2HEADER_LEN]; | |
1443 | u_int i, p1; | |
1444 | ||
1445 | if (!cansend(l2)) | |
1446 | return; | |
1447 | ||
1448 | skb = skb_dequeue(&l2->i_queue); | |
1449 | if (!skb) | |
1450 | return; | |
1451 | ||
1452 | if (test_bit(FLG_MOD128, &l2->flag)) | |
1453 | p1 = (l2->vs - l2->va) % 128; | |
1454 | else | |
1455 | p1 = (l2->vs - l2->va) % 8; | |
1456 | p1 = (p1 + l2->sow) % l2->window; | |
1457 | if (l2->windowar[p1]) { | |
1458 | printk(KERN_WARNING "isdnl2 try overwrite ack queue entry %d\n", | |
1459 | p1); | |
1460 | dev_kfree_skb(l2->windowar[p1]); | |
1461 | } | |
1462 | l2->windowar[p1] = skb; | |
1463 | i = sethdraddr(l2, header, CMD); | |
1464 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1465 | header[i++] = l2->vs << 1; | |
1466 | header[i++] = l2->vr << 1; | |
1467 | l2->vs = (l2->vs + 1) % 128; | |
1468 | } else { | |
1469 | header[i++] = (l2->vr << 5) | (l2->vs << 1); | |
1470 | l2->vs = (l2->vs + 1) % 8; | |
1471 | } | |
1472 | ||
1473 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1474 | p1 = skb_headroom(nskb); | |
1475 | if (p1 >= i) | |
1476 | memcpy(skb_push(nskb, i), header, i); | |
1477 | else { | |
1478 | printk(KERN_WARNING | |
1479 | "isdnl2 pull_iqueue skb header(%d/%d) too short\n", i, p1); | |
1480 | oskb = nskb; | |
1481 | nskb = mI_alloc_skb(oskb->len + i, GFP_ATOMIC); | |
1482 | if (!nskb) { | |
1483 | dev_kfree_skb(oskb); | |
1484 | printk(KERN_WARNING "%s: no skb mem\n", __func__); | |
1485 | return; | |
1486 | } | |
1487 | memcpy(skb_put(nskb, i), header, i); | |
1488 | memcpy(skb_put(nskb, oskb->len), oskb->data, oskb->len); | |
1489 | dev_kfree_skb(oskb); | |
1490 | } | |
1491 | l2down(l2, PH_DATA_REQ, l2_newid(l2), nskb); | |
1492 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1493 | if (!test_and_set_bit(FLG_T200_RUN, &l2->flag)) { | |
1494 | mISDN_FsmDelTimer(&l2->t203, 13); | |
1495 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 11); | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | static void | |
1500 | l2_st8_got_super(struct FsmInst *fi, int event, void *arg) | |
1501 | { | |
1502 | struct layer2 *l2 = fi->userdata; | |
1503 | struct sk_buff *skb = arg; | |
1504 | int PollFlag, rsp, rnr = 0; | |
1505 | unsigned int nr; | |
1506 | ||
1507 | rsp = *skb->data & 0x2; | |
1508 | if (test_bit(FLG_ORIG, &l2->flag)) | |
1509 | rsp = !rsp; | |
1510 | ||
1511 | skb_pull(skb, l2addrsize(l2)); | |
1512 | ||
1513 | if (IsRNR(skb->data, l2)) { | |
1514 | set_peer_busy(l2); | |
1515 | rnr = 1; | |
1516 | } else | |
1517 | clear_peer_busy(l2); | |
1518 | ||
1519 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1520 | PollFlag = (skb->data[1] & 0x1) == 0x1; | |
1521 | nr = skb->data[1] >> 1; | |
1522 | } else { | |
1523 | PollFlag = (skb->data[0] & 0x10); | |
1524 | nr = (skb->data[0] >> 5) & 0x7; | |
1525 | } | |
1526 | dev_kfree_skb(skb); | |
1527 | if (rsp && PollFlag) { | |
1528 | if (legalnr(l2, nr)) { | |
1529 | if (rnr) { | |
1530 | restart_t200(l2, 15); | |
1531 | } else { | |
1532 | stop_t200(l2, 16); | |
1533 | mISDN_FsmAddTimer(&l2->t203, l2->T203, | |
1534 | EV_L2_T203, NULL, 5); | |
1535 | setva(l2, nr); | |
1536 | } | |
1537 | invoke_retransmission(l2, nr); | |
1538 | mISDN_FsmChangeState(fi, ST_L2_7); | |
1539 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) | |
1540 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1541 | } else | |
1542 | nrerrorrecovery(fi); | |
1543 | } else { | |
1544 | if (!rsp && PollFlag) | |
1545 | enquiry_response(l2); | |
1546 | if (legalnr(l2, nr)) | |
1547 | setva(l2, nr); | |
1548 | else | |
1549 | nrerrorrecovery(fi); | |
1550 | } | |
1551 | } | |
1552 | ||
1553 | static void | |
1554 | l2_got_FRMR(struct FsmInst *fi, int event, void *arg) | |
1555 | { | |
1556 | struct layer2 *l2 = fi->userdata; | |
1557 | struct sk_buff *skb = arg; | |
1558 | ||
1559 | skb_pull(skb, l2addrsize(l2) + 1); | |
1560 | ||
1561 | if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */ | |
1562 | (IsUA(skb->data) && (fi->state == ST_L2_7))) { | |
1563 | l2mgr(l2, MDL_ERROR_IND, (void *) 'K'); | |
1564 | establishlink(fi); | |
1565 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1566 | } | |
1567 | dev_kfree_skb(skb); | |
1568 | } | |
1569 | ||
1570 | static void | |
1571 | l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1572 | { | |
1573 | struct layer2 *l2 = fi->userdata; | |
1574 | ||
1575 | skb_queue_purge(&l2->ui_queue); | |
1576 | l2->tei = GROUP_TEI; | |
1577 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1578 | } | |
1579 | ||
1580 | static void | |
1581 | l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1582 | { | |
1583 | struct layer2 *l2 = fi->userdata; | |
1584 | ||
1585 | skb_queue_purge(&l2->ui_queue); | |
1586 | l2->tei = GROUP_TEI; | |
1587 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); | |
1588 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1589 | } | |
1590 | ||
1591 | static void | |
1592 | l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1593 | { | |
1594 | struct layer2 *l2 = fi->userdata; | |
1595 | ||
1596 | skb_queue_purge(&l2->i_queue); | |
1597 | skb_queue_purge(&l2->ui_queue); | |
1598 | freewin(l2); | |
1599 | l2->tei = GROUP_TEI; | |
1600 | stop_t200(l2, 17); | |
1601 | st5_dl_release_l2l3(l2); | |
1602 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1603 | } | |
1604 | ||
1605 | static void | |
1606 | l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1607 | { | |
1608 | struct layer2 *l2 = fi->userdata; | |
1609 | ||
1610 | skb_queue_purge(&l2->ui_queue); | |
1611 | l2->tei = GROUP_TEI; | |
1612 | stop_t200(l2, 18); | |
1613 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); | |
1614 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1615 | } | |
1616 | ||
1617 | static void | |
1618 | l2_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1619 | { | |
1620 | struct layer2 *l2 = fi->userdata; | |
1621 | ||
1622 | skb_queue_purge(&l2->i_queue); | |
1623 | skb_queue_purge(&l2->ui_queue); | |
1624 | freewin(l2); | |
1625 | l2->tei = GROUP_TEI; | |
1626 | stop_t200(l2, 17); | |
1627 | mISDN_FsmDelTimer(&l2->t203, 19); | |
1628 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); | |
1629 | /* mISDN_queue_data(&l2->inst, l2->inst.id | MSG_BROADCAST, | |
1630 | * MGR_SHORTSTATUS_IND, SSTATUS_L2_RELEASED, | |
1631 | * 0, NULL, 0); | |
1632 | */ | |
1633 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1634 | } | |
1635 | ||
1636 | static void | |
1637 | l2_st14_persistant_da(struct FsmInst *fi, int event, void *arg) | |
1638 | { | |
1639 | struct layer2 *l2 = fi->userdata; | |
1640 | struct sk_buff *skb = arg; | |
1641 | ||
1642 | skb_queue_purge(&l2->i_queue); | |
1643 | skb_queue_purge(&l2->ui_queue); | |
1644 | if (test_and_clear_bit(FLG_ESTAB_PEND, &l2->flag)) | |
1645 | l2up(l2, DL_RELEASE_IND, skb); | |
1646 | else | |
1647 | dev_kfree_skb(skb); | |
1648 | } | |
1649 | ||
1650 | static void | |
1651 | l2_st5_persistant_da(struct FsmInst *fi, int event, void *arg) | |
1652 | { | |
1653 | struct layer2 *l2 = fi->userdata; | |
1654 | struct sk_buff *skb = arg; | |
1655 | ||
1656 | skb_queue_purge(&l2->i_queue); | |
1657 | skb_queue_purge(&l2->ui_queue); | |
1658 | freewin(l2); | |
1659 | stop_t200(l2, 19); | |
1660 | st5_dl_release_l2l3(l2); | |
1661 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1662 | if (l2->tm) | |
1663 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1664 | dev_kfree_skb(skb); | |
1665 | } | |
1666 | ||
1667 | static void | |
1668 | l2_st6_persistant_da(struct FsmInst *fi, int event, void *arg) | |
1669 | { | |
1670 | struct layer2 *l2 = fi->userdata; | |
1671 | struct sk_buff *skb = arg; | |
1672 | ||
1673 | skb_queue_purge(&l2->ui_queue); | |
1674 | stop_t200(l2, 20); | |
1675 | l2up(l2, DL_RELEASE_CNF, skb); | |
1676 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1677 | if (l2->tm) | |
1678 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1679 | } | |
1680 | ||
1681 | static void | |
1682 | l2_persistant_da(struct FsmInst *fi, int event, void *arg) | |
1683 | { | |
1684 | struct layer2 *l2 = fi->userdata; | |
1685 | struct sk_buff *skb = arg; | |
1686 | ||
1687 | skb_queue_purge(&l2->i_queue); | |
1688 | skb_queue_purge(&l2->ui_queue); | |
1689 | freewin(l2); | |
1690 | stop_t200(l2, 19); | |
1691 | mISDN_FsmDelTimer(&l2->t203, 19); | |
1692 | l2up(l2, DL_RELEASE_IND, skb); | |
1693 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1694 | if (l2->tm) | |
1695 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1696 | } | |
1697 | ||
1698 | static void | |
1699 | l2_set_own_busy(struct FsmInst *fi, int event, void *arg) | |
1700 | { | |
1701 | struct layer2 *l2 = fi->userdata; | |
1702 | struct sk_buff *skb = arg; | |
1703 | ||
1704 | if (!test_and_set_bit(FLG_OWN_BUSY, &l2->flag)) { | |
1705 | enquiry_cr(l2, RNR, RSP, 0); | |
1706 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1707 | } | |
1708 | if (skb) | |
1709 | dev_kfree_skb(skb); | |
1710 | } | |
1711 | ||
1712 | static void | |
1713 | l2_clear_own_busy(struct FsmInst *fi, int event, void *arg) | |
1714 | { | |
1715 | struct layer2 *l2 = fi->userdata; | |
1716 | struct sk_buff *skb = arg; | |
1717 | ||
1718 | if (!test_and_clear_bit(FLG_OWN_BUSY, &l2->flag)) { | |
1719 | enquiry_cr(l2, RR, RSP, 0); | |
1720 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1721 | } | |
1722 | if (skb) | |
1723 | dev_kfree_skb(skb); | |
1724 | } | |
1725 | ||
1726 | static void | |
1727 | l2_frame_error(struct FsmInst *fi, int event, void *arg) | |
1728 | { | |
1729 | struct layer2 *l2 = fi->userdata; | |
1730 | ||
1731 | l2mgr(l2, MDL_ERROR_IND, arg); | |
1732 | } | |
1733 | ||
1734 | static void | |
1735 | l2_frame_error_reest(struct FsmInst *fi, int event, void *arg) | |
1736 | { | |
1737 | struct layer2 *l2 = fi->userdata; | |
1738 | ||
1739 | l2mgr(l2, MDL_ERROR_IND, arg); | |
1740 | establishlink(fi); | |
1741 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1742 | } | |
1743 | ||
1744 | static struct FsmNode L2FnList[] = | |
1745 | { | |
1746 | {ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign}, | |
1747 | {ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3}, | |
1748 | {ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish}, | |
1749 | {ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3}, | |
1750 | {ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, | |
1751 | {ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, | |
1752 | {ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release}, | |
1753 | {ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel}, | |
1754 | {ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect}, | |
1755 | {ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect}, | |
1756 | {ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest}, | |
1757 | {ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull}, | |
1758 | {ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue}, | |
1759 | {ST_L2_1, EV_L2_DL_UNITDATA, l2_queue_ui_assign}, | |
1760 | {ST_L2_2, EV_L2_DL_UNITDATA, l2_queue_ui}, | |
1761 | {ST_L2_3, EV_L2_DL_UNITDATA, l2_queue_ui}, | |
1762 | {ST_L2_4, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1763 | {ST_L2_5, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1764 | {ST_L2_6, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1765 | {ST_L2_7, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1766 | {ST_L2_8, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1767 | {ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1768 | {ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1769 | {ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1770 | {ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove}, | |
1771 | {ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove}, | |
1772 | {ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove}, | |
1773 | {ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove}, | |
1774 | {ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove}, | |
1775 | {ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove}, | |
1776 | {ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove}, | |
1777 | {ST_L2_4, EV_L2_SABME, l2_start_multi}, | |
1778 | {ST_L2_5, EV_L2_SABME, l2_send_UA}, | |
1779 | {ST_L2_6, EV_L2_SABME, l2_send_DM}, | |
1780 | {ST_L2_7, EV_L2_SABME, l2_restart_multi}, | |
1781 | {ST_L2_8, EV_L2_SABME, l2_restart_multi}, | |
1782 | {ST_L2_4, EV_L2_DISC, l2_send_DM}, | |
1783 | {ST_L2_5, EV_L2_DISC, l2_send_DM}, | |
1784 | {ST_L2_6, EV_L2_DISC, l2_send_UA}, | |
1785 | {ST_L2_7, EV_L2_DISC, l2_stop_multi}, | |
1786 | {ST_L2_8, EV_L2_DISC, l2_stop_multi}, | |
1787 | {ST_L2_4, EV_L2_UA, l2_mdl_error_ua}, | |
1788 | {ST_L2_5, EV_L2_UA, l2_connected}, | |
1789 | {ST_L2_6, EV_L2_UA, l2_released}, | |
1790 | {ST_L2_7, EV_L2_UA, l2_mdl_error_ua}, | |
1791 | {ST_L2_8, EV_L2_UA, l2_mdl_error_ua}, | |
1792 | {ST_L2_4, EV_L2_DM, l2_reestablish}, | |
1793 | {ST_L2_5, EV_L2_DM, l2_st5_dm_release}, | |
1794 | {ST_L2_6, EV_L2_DM, l2_st6_dm_release}, | |
1795 | {ST_L2_7, EV_L2_DM, l2_mdl_error_dm}, | |
1796 | {ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm}, | |
1797 | {ST_L2_1, EV_L2_UI, l2_got_ui}, | |
1798 | {ST_L2_2, EV_L2_UI, l2_got_ui}, | |
1799 | {ST_L2_3, EV_L2_UI, l2_got_ui}, | |
1800 | {ST_L2_4, EV_L2_UI, l2_got_ui}, | |
1801 | {ST_L2_5, EV_L2_UI, l2_got_ui}, | |
1802 | {ST_L2_6, EV_L2_UI, l2_got_ui}, | |
1803 | {ST_L2_7, EV_L2_UI, l2_got_ui}, | |
1804 | {ST_L2_8, EV_L2_UI, l2_got_ui}, | |
1805 | {ST_L2_7, EV_L2_FRMR, l2_got_FRMR}, | |
1806 | {ST_L2_8, EV_L2_FRMR, l2_got_FRMR}, | |
1807 | {ST_L2_7, EV_L2_SUPER, l2_st7_got_super}, | |
1808 | {ST_L2_8, EV_L2_SUPER, l2_st8_got_super}, | |
1809 | {ST_L2_7, EV_L2_I, l2_got_iframe}, | |
1810 | {ST_L2_8, EV_L2_I, l2_got_iframe}, | |
1811 | {ST_L2_5, EV_L2_T200, l2_st5_tout_200}, | |
1812 | {ST_L2_6, EV_L2_T200, l2_st6_tout_200}, | |
1813 | {ST_L2_7, EV_L2_T200, l2_st7_tout_200}, | |
1814 | {ST_L2_8, EV_L2_T200, l2_st8_tout_200}, | |
1815 | {ST_L2_7, EV_L2_T203, l2_st7_tout_203}, | |
1816 | {ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue}, | |
1817 | {ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, | |
1818 | {ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, | |
1819 | {ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, | |
1820 | {ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, | |
1821 | {ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1822 | {ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1823 | {ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1824 | {ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest}, | |
1825 | {ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest}, | |
1826 | {ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistant_da}, | |
1827 | {ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove}, | |
1828 | {ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove}, | |
1829 | {ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistant_da}, | |
1830 | {ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistant_da}, | |
1831 | {ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistant_da}, | |
1832 | {ST_L2_7, EV_L1_DEACTIVATE, l2_persistant_da}, | |
1833 | {ST_L2_8, EV_L1_DEACTIVATE, l2_persistant_da}, | |
1834 | }; | |
1835 | ||
1b2b03f8 KK |
1836 | static int |
1837 | ph_data_indication(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb) | |
1838 | { | |
1839 | u_char *datap = skb->data; | |
1840 | int ret = -EINVAL; | |
1841 | int psapi, ptei; | |
1842 | u_int l; | |
1843 | int c = 0; | |
1844 | ||
1845 | l = l2addrsize(l2); | |
1846 | if (skb->len <= l) { | |
1847 | mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *) 'N'); | |
1848 | return ret; | |
1849 | } | |
1850 | if (test_bit(FLG_LAPD, &l2->flag)) { /* Maybe not needed */ | |
1851 | psapi = *datap++; | |
1852 | ptei = *datap++; | |
1853 | if ((psapi & 1) || !(ptei & 1)) { | |
1854 | printk(KERN_WARNING | |
1855 | "l2 D-channel frame wrong EA0/EA1\n"); | |
1856 | return ret; | |
1857 | } | |
1858 | psapi >>= 2; | |
1859 | ptei >>= 1; | |
1860 | if (psapi != l2->sapi) { | |
d796509a AE |
1861 | /* not our bussiness */ |
1862 | if (*debug & DEBUG_L2) | |
1863 | printk(KERN_DEBUG "%s: sapi %d/%d mismatch\n", | |
1864 | __func__, psapi, l2->sapi); | |
1b2b03f8 KK |
1865 | dev_kfree_skb(skb); |
1866 | return 0; | |
1867 | } | |
1868 | if ((ptei != l2->tei) && (ptei != GROUP_TEI)) { | |
d796509a AE |
1869 | /* not our bussiness */ |
1870 | if (*debug & DEBUG_L2) | |
1871 | printk(KERN_DEBUG "%s: tei %d/%d mismatch\n", | |
1872 | __func__, ptei, l2->tei); | |
1b2b03f8 KK |
1873 | dev_kfree_skb(skb); |
1874 | return 0; | |
1875 | } | |
1876 | } else | |
1877 | datap += l; | |
1878 | if (!(*datap & 1)) { /* I-Frame */ | |
1879 | c = iframe_error(l2, skb); | |
1880 | if (!c) | |
1881 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_I, skb); | |
1882 | } else if (IsSFrame(datap, l2)) { /* S-Frame */ | |
1883 | c = super_error(l2, skb); | |
1884 | if (!c) | |
1885 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_SUPER, skb); | |
1886 | } else if (IsUI(datap)) { | |
1887 | c = UI_error(l2, skb); | |
1888 | if (!c) | |
1889 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_UI, skb); | |
1890 | } else if (IsSABME(datap, l2)) { | |
1891 | c = unnum_error(l2, skb, CMD); | |
1892 | if (!c) | |
1893 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_SABME, skb); | |
1894 | } else if (IsUA(datap)) { | |
1895 | c = unnum_error(l2, skb, RSP); | |
1896 | if (!c) | |
1897 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_UA, skb); | |
1898 | } else if (IsDISC(datap)) { | |
1899 | c = unnum_error(l2, skb, CMD); | |
1900 | if (!c) | |
1901 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DISC, skb); | |
1902 | } else if (IsDM(datap)) { | |
1903 | c = unnum_error(l2, skb, RSP); | |
1904 | if (!c) | |
1905 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DM, skb); | |
1906 | } else if (IsFRMR(datap)) { | |
1907 | c = FRMR_error(l2, skb); | |
1908 | if (!c) | |
1909 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_FRMR, skb); | |
1910 | } else | |
1911 | c = 'L'; | |
1912 | if (c) { | |
1913 | printk(KERN_WARNING "l2 D-channel frame error %c\n", c); | |
1914 | mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *)(long)c); | |
1915 | } | |
1916 | return ret; | |
1917 | } | |
1918 | ||
1919 | static int | |
1920 | l2_send(struct mISDNchannel *ch, struct sk_buff *skb) | |
1921 | { | |
1922 | struct layer2 *l2 = container_of(ch, struct layer2, ch); | |
1923 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
1924 | int ret = -EINVAL; | |
1925 | ||
1926 | if (*debug & DEBUG_L2_RECV) | |
d796509a AE |
1927 | printk(KERN_DEBUG "%s: prim(%x) id(%x) sapi(%d) tei(%d)\n", |
1928 | __func__, hh->prim, hh->id, l2->sapi, l2->tei); | |
1b2b03f8 KK |
1929 | switch (hh->prim) { |
1930 | case PH_DATA_IND: | |
1931 | ret = ph_data_indication(l2, hh, skb); | |
1932 | break; | |
1933 | case PH_DATA_CNF: | |
1934 | ret = ph_data_confirm(l2, hh, skb); | |
1935 | break; | |
1936 | case PH_ACTIVATE_IND: | |
1937 | test_and_set_bit(FLG_L1_ACTIV, &l2->flag); | |
1938 | l2up_create(l2, MPH_ACTIVATE_IND, 0, NULL); | |
1939 | if (test_and_clear_bit(FLG_ESTAB_PEND, &l2->flag)) | |
1940 | ret = mISDN_FsmEvent(&l2->l2m, | |
1941 | EV_L2_DL_ESTABLISH_REQ, skb); | |
1942 | break; | |
1943 | case PH_DEACTIVATE_IND: | |
1944 | test_and_clear_bit(FLG_L1_ACTIV, &l2->flag); | |
1945 | l2up_create(l2, MPH_DEACTIVATE_IND, 0, NULL); | |
1946 | ret = mISDN_FsmEvent(&l2->l2m, EV_L1_DEACTIVATE, skb); | |
1947 | break; | |
1948 | case MPH_INFORMATION_IND: | |
1949 | if (!l2->up) | |
1950 | break; | |
1951 | ret = l2->up->send(l2->up, skb); | |
1952 | break; | |
1953 | case DL_DATA_REQ: | |
1954 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_DATA, skb); | |
1955 | break; | |
1956 | case DL_UNITDATA_REQ: | |
1957 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_UNITDATA, skb); | |
1958 | break; | |
1959 | case DL_ESTABLISH_REQ: | |
1960 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1961 | test_and_set_bit(FLG_ORIG, &l2->flag); | |
1962 | if (test_bit(FLG_L1_ACTIV, &l2->flag)) { | |
1963 | if (test_bit(FLG_LAPD, &l2->flag) || | |
1964 | test_bit(FLG_ORIG, &l2->flag)) | |
1965 | ret = mISDN_FsmEvent(&l2->l2m, | |
1966 | EV_L2_DL_ESTABLISH_REQ, skb); | |
1967 | } else { | |
1968 | if (test_bit(FLG_LAPD, &l2->flag) || | |
1969 | test_bit(FLG_ORIG, &l2->flag)) { | |
1970 | test_and_set_bit(FLG_ESTAB_PEND, | |
1971 | &l2->flag); | |
1972 | } | |
1973 | ret = l2down(l2, PH_ACTIVATE_REQ, l2_newid(l2), | |
1974 | skb); | |
1975 | } | |
1976 | break; | |
1977 | case DL_RELEASE_REQ: | |
1978 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1979 | l2down_create(l2, PH_DEACTIVATE_REQ, | |
1980 | l2_newid(l2), 0, NULL); | |
1981 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_RELEASE_REQ, | |
1982 | skb); | |
1983 | break; | |
1984 | default: | |
1985 | if (*debug & DEBUG_L2) | |
1986 | l2m_debug(&l2->l2m, "l2 unknown pr %04x", | |
1987 | hh->prim); | |
1988 | } | |
1989 | if (ret) { | |
1990 | dev_kfree_skb(skb); | |
1991 | ret = 0; | |
1992 | } | |
1993 | return ret; | |
1994 | } | |
1995 | ||
1996 | int | |
1997 | tei_l2(struct layer2 *l2, u_int cmd, u_long arg) | |
1998 | { | |
1999 | int ret = -EINVAL; | |
2000 | ||
2001 | if (*debug & DEBUG_L2_TEI) | |
2002 | printk(KERN_DEBUG "%s: cmd(%x)\n", __func__, cmd); | |
2003 | switch (cmd) { | |
2004 | case (MDL_ASSIGN_REQ): | |
2005 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ASSIGN, (void *)arg); | |
2006 | break; | |
2007 | case (MDL_REMOVE_REQ): | |
2008 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_REMOVE, NULL); | |
2009 | break; | |
2010 | case (MDL_ERROR_IND): | |
2011 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL); | |
2012 | break; | |
2013 | case (MDL_ERROR_RSP): | |
2014 | /* ETS 300-125 5.3.2.1 Test: TC13010 */ | |
2015 | printk(KERN_NOTICE "MDL_ERROR|REQ (tei_l2)\n"); | |
2016 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL); | |
2017 | break; | |
2018 | } | |
2019 | return ret; | |
2020 | } | |
2021 | ||
2022 | static void | |
2023 | release_l2(struct layer2 *l2) | |
2024 | { | |
2025 | mISDN_FsmDelTimer(&l2->t200, 21); | |
2026 | mISDN_FsmDelTimer(&l2->t203, 16); | |
2027 | skb_queue_purge(&l2->i_queue); | |
2028 | skb_queue_purge(&l2->ui_queue); | |
2029 | skb_queue_purge(&l2->down_queue); | |
2030 | ReleaseWin(l2); | |
2031 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
c5b61d59 | 2032 | TEIrelease(l2); |
1b2b03f8 KK |
2033 | if (l2->ch.st) |
2034 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, | |
2035 | CLOSE_CHANNEL, NULL); | |
2036 | } | |
2037 | kfree(l2); | |
2038 | } | |
2039 | ||
2040 | static int | |
2041 | l2_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
2042 | { | |
2043 | struct layer2 *l2 = container_of(ch, struct layer2, ch); | |
2044 | u_int info; | |
2045 | ||
2046 | if (*debug & DEBUG_L2_CTRL) | |
2047 | printk(KERN_DEBUG "%s:(%x)\n", __func__, cmd); | |
2048 | ||
2049 | switch (cmd) { | |
2050 | case OPEN_CHANNEL: | |
2051 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
2052 | set_channel_address(&l2->ch, l2->sapi, l2->tei); | |
2053 | info = DL_INFO_L2_CONNECT; | |
2054 | l2up_create(l2, DL_INFORMATION_IND, | |
2055 | sizeof(info), &info); | |
2056 | } | |
2057 | break; | |
2058 | case CLOSE_CHANNEL: | |
2059 | if (l2->ch.peer) | |
2060 | l2->ch.peer->ctrl(l2->ch.peer, CLOSE_CHANNEL, NULL); | |
2061 | release_l2(l2); | |
2062 | break; | |
2063 | } | |
2064 | return 0; | |
2065 | } | |
2066 | ||
2067 | struct layer2 * | |
5b277b86 AE |
2068 | create_l2(struct mISDNchannel *ch, u_int protocol, u_long options, int tei, |
2069 | int sapi) | |
1b2b03f8 KK |
2070 | { |
2071 | struct layer2 *l2; | |
2072 | struct channel_req rq; | |
2073 | ||
2074 | l2 = kzalloc(sizeof(struct layer2), GFP_KERNEL); | |
2075 | if (!l2) { | |
2076 | printk(KERN_ERR "kzalloc layer2 failed\n"); | |
2077 | return NULL; | |
2078 | } | |
2079 | l2->next_id = 1; | |
2080 | l2->down_id = MISDN_ID_NONE; | |
2081 | l2->up = ch; | |
2082 | l2->ch.st = ch->st; | |
2083 | l2->ch.send = l2_send; | |
2084 | l2->ch.ctrl = l2_ctrl; | |
2085 | switch (protocol) { | |
2086 | case ISDN_P_LAPD_NT: | |
2087 | test_and_set_bit(FLG_LAPD, &l2->flag); | |
2088 | test_and_set_bit(FLG_LAPD_NET, &l2->flag); | |
2089 | test_and_set_bit(FLG_MOD128, &l2->flag); | |
5b277b86 | 2090 | l2->sapi = sapi; |
1b2b03f8 KK |
2091 | l2->maxlen = MAX_DFRAME_LEN; |
2092 | if (test_bit(OPTION_L2_PMX, &options)) | |
2093 | l2->window = 7; | |
2094 | else | |
2095 | l2->window = 1; | |
2096 | if (test_bit(OPTION_L2_PTP, &options)) | |
2097 | test_and_set_bit(FLG_PTP, &l2->flag); | |
2098 | if (test_bit(OPTION_L2_FIXEDTEI, &options)) | |
2099 | test_and_set_bit(FLG_FIXED_TEI, &l2->flag); | |
5b277b86 | 2100 | l2->tei = tei; |
1b2b03f8 KK |
2101 | l2->T200 = 1000; |
2102 | l2->N200 = 3; | |
2103 | l2->T203 = 10000; | |
2104 | if (test_bit(OPTION_L2_PMX, &options)) | |
2105 | rq.protocol = ISDN_P_NT_E1; | |
2106 | else | |
2107 | rq.protocol = ISDN_P_NT_S0; | |
2108 | rq.adr.channel = 0; | |
2109 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, OPEN_CHANNEL, &rq); | |
2110 | break; | |
2111 | case ISDN_P_LAPD_TE: | |
2112 | test_and_set_bit(FLG_LAPD, &l2->flag); | |
2113 | test_and_set_bit(FLG_MOD128, &l2->flag); | |
2114 | test_and_set_bit(FLG_ORIG, &l2->flag); | |
5b277b86 | 2115 | l2->sapi = sapi; |
1b2b03f8 KK |
2116 | l2->maxlen = MAX_DFRAME_LEN; |
2117 | if (test_bit(OPTION_L2_PMX, &options)) | |
2118 | l2->window = 7; | |
2119 | else | |
2120 | l2->window = 1; | |
2121 | if (test_bit(OPTION_L2_PTP, &options)) | |
2122 | test_and_set_bit(FLG_PTP, &l2->flag); | |
2123 | if (test_bit(OPTION_L2_FIXEDTEI, &options)) | |
2124 | test_and_set_bit(FLG_FIXED_TEI, &l2->flag); | |
5b277b86 | 2125 | l2->tei = tei; |
1b2b03f8 KK |
2126 | l2->T200 = 1000; |
2127 | l2->N200 = 3; | |
2128 | l2->T203 = 10000; | |
2129 | if (test_bit(OPTION_L2_PMX, &options)) | |
2130 | rq.protocol = ISDN_P_TE_E1; | |
2131 | else | |
2132 | rq.protocol = ISDN_P_TE_S0; | |
2133 | rq.adr.channel = 0; | |
2134 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, OPEN_CHANNEL, &rq); | |
2135 | break; | |
2136 | case ISDN_P_B_X75SLP: | |
2137 | test_and_set_bit(FLG_LAPB, &l2->flag); | |
2138 | l2->window = 7; | |
2139 | l2->maxlen = MAX_DATA_SIZE; | |
2140 | l2->T200 = 1000; | |
2141 | l2->N200 = 4; | |
2142 | l2->T203 = 5000; | |
2143 | l2->addr.A = 3; | |
2144 | l2->addr.B = 1; | |
2145 | break; | |
2146 | default: | |
2147 | printk(KERN_ERR "layer2 create failed prt %x\n", | |
2148 | protocol); | |
2149 | kfree(l2); | |
2150 | return NULL; | |
2151 | } | |
2152 | skb_queue_head_init(&l2->i_queue); | |
2153 | skb_queue_head_init(&l2->ui_queue); | |
2154 | skb_queue_head_init(&l2->down_queue); | |
2155 | skb_queue_head_init(&l2->tmp_queue); | |
2156 | InitWin(l2); | |
2157 | l2->l2m.fsm = &l2fsm; | |
2158 | if (test_bit(FLG_LAPB, &l2->flag) || | |
2159 | test_bit(FLG_PTP, &l2->flag) || | |
2160 | test_bit(FLG_LAPD_NET, &l2->flag)) | |
2161 | l2->l2m.state = ST_L2_4; | |
2162 | else | |
2163 | l2->l2m.state = ST_L2_1; | |
2164 | l2->l2m.debug = *debug; | |
2165 | l2->l2m.userdata = l2; | |
2166 | l2->l2m.userint = 0; | |
2167 | l2->l2m.printdebug = l2m_debug; | |
2168 | ||
2169 | mISDN_FsmInitTimer(&l2->l2m, &l2->t200); | |
2170 | mISDN_FsmInitTimer(&l2->l2m, &l2->t203); | |
2171 | return l2; | |
2172 | } | |
2173 | ||
2174 | static int | |
2175 | x75create(struct channel_req *crq) | |
2176 | { | |
2177 | struct layer2 *l2; | |
2178 | ||
2179 | if (crq->protocol != ISDN_P_B_X75SLP) | |
2180 | return -EPROTONOSUPPORT; | |
5b277b86 | 2181 | l2 = create_l2(crq->ch, crq->protocol, 0, 0, 0); |
1b2b03f8 KK |
2182 | if (!l2) |
2183 | return -ENOMEM; | |
2184 | crq->ch = &l2->ch; | |
2185 | crq->protocol = ISDN_P_B_HDLC; | |
2186 | return 0; | |
2187 | } | |
2188 | ||
2189 | static struct Bprotocol X75SLP = { | |
2190 | .Bprotocols = (1 << (ISDN_P_B_X75SLP & ISDN_P_B_MASK)), | |
2191 | .name = "X75SLP", | |
2192 | .create = x75create | |
2193 | }; | |
2194 | ||
2195 | int | |
2196 | Isdnl2_Init(u_int *deb) | |
2197 | { | |
2198 | debug = deb; | |
2199 | mISDN_register_Bprotocol(&X75SLP); | |
2200 | l2fsm.state_count = L2_STATE_COUNT; | |
2201 | l2fsm.event_count = L2_EVENT_COUNT; | |
2202 | l2fsm.strEvent = strL2Event; | |
2203 | l2fsm.strState = strL2State; | |
2204 | mISDN_FsmNew(&l2fsm, L2FnList, ARRAY_SIZE(L2FnList)); | |
2205 | TEIInit(deb); | |
2206 | return 0; | |
2207 | } | |
2208 | ||
2209 | void | |
2210 | Isdnl2_cleanup(void) | |
2211 | { | |
2212 | mISDN_unregister_Bprotocol(&X75SLP); | |
2213 | TEIFree(); | |
2214 | mISDN_FsmFree(&l2fsm); | |
2215 | } | |
2216 |