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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; | |
020f01eb | 98 | struct va_format vaf; |
1b2b03f8 KK |
99 | va_list va; |
100 | ||
101 | if (!(*debug & DEBUG_L2_FSM)) | |
102 | return; | |
020f01eb | 103 | |
1b2b03f8 | 104 | va_start(va, fmt); |
020f01eb JP |
105 | |
106 | vaf.fmt = fmt; | |
107 | vaf.va = &va; | |
108 | ||
109 | printk(KERN_DEBUG "l2 (sapi %d tei %d): %pV\n", | |
110 | l2->sapi, l2->tei, &vaf); | |
111 | ||
1b2b03f8 KK |
112 | va_end(va); |
113 | } | |
114 | ||
115 | inline u_int | |
116 | l2headersize(struct layer2 *l2, int ui) | |
117 | { | |
118 | return ((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) + | |
119 | (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1); | |
120 | } | |
121 | ||
122 | inline u_int | |
123 | l2addrsize(struct layer2 *l2) | |
124 | { | |
125 | return test_bit(FLG_LAPD, &l2->flag) ? 2 : 1; | |
126 | } | |
127 | ||
128 | static u_int | |
129 | l2_newid(struct layer2 *l2) | |
130 | { | |
131 | u_int id; | |
132 | ||
133 | id = l2->next_id++; | |
134 | if (id == 0x7fff) | |
135 | l2->next_id = 1; | |
136 | id <<= 16; | |
137 | id |= l2->tei << 8; | |
138 | id |= l2->sapi; | |
139 | return id; | |
140 | } | |
141 | ||
142 | static void | |
143 | l2up(struct layer2 *l2, u_int prim, struct sk_buff *skb) | |
144 | { | |
145 | int err; | |
146 | ||
147 | if (!l2->up) | |
148 | return; | |
149 | mISDN_HEAD_PRIM(skb) = prim; | |
150 | mISDN_HEAD_ID(skb) = (l2->ch.nr << 16) | l2->ch.addr; | |
151 | err = l2->up->send(l2->up, skb); | |
152 | if (err) { | |
153 | printk(KERN_WARNING "%s: err=%d\n", __func__, err); | |
154 | dev_kfree_skb(skb); | |
155 | } | |
156 | } | |
157 | ||
158 | static void | |
159 | l2up_create(struct layer2 *l2, u_int prim, int len, void *arg) | |
160 | { | |
161 | struct sk_buff *skb; | |
162 | struct mISDNhead *hh; | |
163 | int err; | |
164 | ||
165 | if (!l2->up) | |
166 | return; | |
167 | skb = mI_alloc_skb(len, GFP_ATOMIC); | |
168 | if (!skb) | |
169 | return; | |
170 | hh = mISDN_HEAD_P(skb); | |
171 | hh->prim = prim; | |
172 | hh->id = (l2->ch.nr << 16) | l2->ch.addr; | |
173 | if (len) | |
174 | memcpy(skb_put(skb, len), arg, len); | |
175 | err = l2->up->send(l2->up, skb); | |
176 | if (err) { | |
177 | printk(KERN_WARNING "%s: err=%d\n", __func__, err); | |
178 | dev_kfree_skb(skb); | |
179 | } | |
180 | } | |
181 | ||
182 | static int | |
183 | l2down_skb(struct layer2 *l2, struct sk_buff *skb) { | |
184 | int ret; | |
185 | ||
186 | ret = l2->ch.recv(l2->ch.peer, skb); | |
187 | if (ret && (*debug & DEBUG_L2_RECV)) | |
188 | printk(KERN_DEBUG "l2down_skb: ret(%d)\n", ret); | |
189 | return ret; | |
190 | } | |
191 | ||
192 | static int | |
193 | l2down_raw(struct layer2 *l2, struct sk_buff *skb) | |
194 | { | |
195 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
196 | ||
197 | if (hh->prim == PH_DATA_REQ) { | |
198 | if (test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) { | |
199 | skb_queue_tail(&l2->down_queue, skb); | |
200 | return 0; | |
201 | } | |
202 | l2->down_id = mISDN_HEAD_ID(skb); | |
203 | } | |
204 | return l2down_skb(l2, skb); | |
205 | } | |
206 | ||
207 | static int | |
208 | l2down(struct layer2 *l2, u_int prim, u_int id, struct sk_buff *skb) | |
209 | { | |
210 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
211 | ||
212 | hh->prim = prim; | |
213 | hh->id = id; | |
214 | return l2down_raw(l2, skb); | |
215 | } | |
216 | ||
217 | static int | |
218 | l2down_create(struct layer2 *l2, u_int prim, u_int id, int len, void *arg) | |
219 | { | |
220 | struct sk_buff *skb; | |
221 | int err; | |
222 | struct mISDNhead *hh; | |
223 | ||
224 | skb = mI_alloc_skb(len, GFP_ATOMIC); | |
225 | if (!skb) | |
226 | return -ENOMEM; | |
227 | hh = mISDN_HEAD_P(skb); | |
228 | hh->prim = prim; | |
229 | hh->id = id; | |
230 | if (len) | |
231 | memcpy(skb_put(skb, len), arg, len); | |
232 | err = l2down_raw(l2, skb); | |
233 | if (err) | |
234 | dev_kfree_skb(skb); | |
235 | return err; | |
236 | } | |
237 | ||
238 | static int | |
239 | ph_data_confirm(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb) { | |
240 | struct sk_buff *nskb = skb; | |
241 | int ret = -EAGAIN; | |
242 | ||
243 | if (test_bit(FLG_L1_NOTREADY, &l2->flag)) { | |
244 | if (hh->id == l2->down_id) { | |
245 | nskb = skb_dequeue(&l2->down_queue); | |
246 | if (nskb) { | |
247 | l2->down_id = mISDN_HEAD_ID(nskb); | |
248 | if (l2down_skb(l2, nskb)) { | |
249 | dev_kfree_skb(nskb); | |
250 | l2->down_id = MISDN_ID_NONE; | |
251 | } | |
252 | } else | |
253 | l2->down_id = MISDN_ID_NONE; | |
254 | if (ret) { | |
255 | dev_kfree_skb(skb); | |
256 | ret = 0; | |
257 | } | |
258 | if (l2->down_id == MISDN_ID_NONE) { | |
259 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); | |
260 | mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL); | |
261 | } | |
262 | } | |
263 | } | |
264 | if (!test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) { | |
265 | nskb = skb_dequeue(&l2->down_queue); | |
266 | if (nskb) { | |
267 | l2->down_id = mISDN_HEAD_ID(nskb); | |
268 | if (l2down_skb(l2, nskb)) { | |
269 | dev_kfree_skb(nskb); | |
270 | l2->down_id = MISDN_ID_NONE; | |
271 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); | |
272 | } | |
273 | } else | |
274 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); | |
275 | } | |
276 | return ret; | |
277 | } | |
278 | ||
279 | static int | |
280 | l2mgr(struct layer2 *l2, u_int prim, void *arg) { | |
281 | long c = (long)arg; | |
282 | ||
283 | printk(KERN_WARNING | |
284 | "l2mgr: addr:%x prim %x %c\n", l2->id, prim, (char)c); | |
285 | if (test_bit(FLG_LAPD, &l2->flag) && | |
286 | !test_bit(FLG_FIXED_TEI, &l2->flag)) { | |
287 | switch (c) { | |
288 | case 'C': | |
289 | case 'D': | |
290 | case 'G': | |
291 | case 'H': | |
292 | l2_tei(l2, prim, (u_long)arg); | |
293 | break; | |
294 | } | |
295 | } | |
296 | return 0; | |
297 | } | |
298 | ||
299 | static void | |
300 | set_peer_busy(struct layer2 *l2) { | |
301 | test_and_set_bit(FLG_PEER_BUSY, &l2->flag); | |
302 | if (skb_queue_len(&l2->i_queue) || skb_queue_len(&l2->ui_queue)) | |
303 | test_and_set_bit(FLG_L2BLOCK, &l2->flag); | |
304 | } | |
305 | ||
306 | static void | |
307 | clear_peer_busy(struct layer2 *l2) { | |
308 | if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag)) | |
309 | test_and_clear_bit(FLG_L2BLOCK, &l2->flag); | |
310 | } | |
311 | ||
312 | static void | |
313 | InitWin(struct layer2 *l2) | |
314 | { | |
315 | int i; | |
316 | ||
317 | for (i = 0; i < MAX_WINDOW; i++) | |
318 | l2->windowar[i] = NULL; | |
319 | } | |
320 | ||
321 | static int | |
322 | freewin(struct layer2 *l2) | |
323 | { | |
324 | int i, cnt = 0; | |
325 | ||
326 | for (i = 0; i < MAX_WINDOW; i++) { | |
327 | if (l2->windowar[i]) { | |
328 | cnt++; | |
329 | dev_kfree_skb(l2->windowar[i]); | |
330 | l2->windowar[i] = NULL; | |
331 | } | |
332 | } | |
333 | return cnt; | |
334 | } | |
335 | ||
336 | static void | |
337 | ReleaseWin(struct layer2 *l2) | |
338 | { | |
339 | int cnt = freewin(l2); | |
340 | ||
341 | if (cnt) | |
342 | printk(KERN_WARNING | |
343 | "isdnl2 freed %d skbuffs in release\n", cnt); | |
344 | } | |
345 | ||
346 | inline unsigned int | |
347 | cansend(struct layer2 *l2) | |
348 | { | |
349 | unsigned int p1; | |
350 | ||
351 | if (test_bit(FLG_MOD128, &l2->flag)) | |
352 | p1 = (l2->vs - l2->va) % 128; | |
353 | else | |
354 | p1 = (l2->vs - l2->va) % 8; | |
355 | return (p1 < l2->window) && !test_bit(FLG_PEER_BUSY, &l2->flag); | |
356 | } | |
357 | ||
358 | inline void | |
359 | clear_exception(struct layer2 *l2) | |
360 | { | |
361 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
362 | test_and_clear_bit(FLG_REJEXC, &l2->flag); | |
363 | test_and_clear_bit(FLG_OWN_BUSY, &l2->flag); | |
364 | clear_peer_busy(l2); | |
365 | } | |
366 | ||
367 | static int | |
368 | sethdraddr(struct layer2 *l2, u_char *header, int rsp) | |
369 | { | |
370 | u_char *ptr = header; | |
371 | int crbit = rsp; | |
372 | ||
373 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
374 | if (test_bit(FLG_LAPD_NET, &l2->flag)) | |
375 | crbit = !crbit; | |
376 | *ptr++ = (l2->sapi << 2) | (crbit ? 2 : 0); | |
377 | *ptr++ = (l2->tei << 1) | 1; | |
378 | return 2; | |
379 | } else { | |
380 | if (test_bit(FLG_ORIG, &l2->flag)) | |
381 | crbit = !crbit; | |
382 | if (crbit) | |
383 | *ptr++ = l2->addr.B; | |
384 | else | |
385 | *ptr++ = l2->addr.A; | |
386 | return 1; | |
387 | } | |
388 | } | |
389 | ||
390 | static inline void | |
391 | enqueue_super(struct layer2 *l2, struct sk_buff *skb) | |
392 | { | |
393 | if (l2down(l2, PH_DATA_REQ, l2_newid(l2), skb)) | |
394 | dev_kfree_skb(skb); | |
395 | } | |
396 | ||
397 | static inline void | |
398 | enqueue_ui(struct layer2 *l2, struct sk_buff *skb) | |
399 | { | |
400 | if (l2->tm) | |
401 | l2_tei(l2, MDL_STATUS_UI_IND, 0); | |
402 | if (l2down(l2, PH_DATA_REQ, l2_newid(l2), skb)) | |
403 | dev_kfree_skb(skb); | |
404 | } | |
405 | ||
406 | inline int | |
407 | IsUI(u_char *data) | |
408 | { | |
409 | return (data[0] & 0xef) == UI; | |
410 | } | |
411 | ||
412 | inline int | |
413 | IsUA(u_char *data) | |
414 | { | |
415 | return (data[0] & 0xef) == UA; | |
416 | } | |
417 | ||
418 | inline int | |
419 | IsDM(u_char *data) | |
420 | { | |
421 | return (data[0] & 0xef) == DM; | |
422 | } | |
423 | ||
424 | inline int | |
425 | IsDISC(u_char *data) | |
426 | { | |
427 | return (data[0] & 0xef) == DISC; | |
428 | } | |
429 | ||
430 | inline int | |
431 | IsRR(u_char *data, struct layer2 *l2) | |
432 | { | |
433 | if (test_bit(FLG_MOD128, &l2->flag)) | |
434 | return data[0] == RR; | |
435 | else | |
436 | return (data[0] & 0xf) == 1; | |
437 | } | |
438 | ||
439 | inline int | |
440 | IsSFrame(u_char *data, struct layer2 *l2) | |
441 | { | |
442 | register u_char d = *data; | |
443 | ||
444 | if (!test_bit(FLG_MOD128, &l2->flag)) | |
445 | d &= 0xf; | |
446 | return ((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c); | |
447 | } | |
448 | ||
449 | inline int | |
450 | IsSABME(u_char *data, struct layer2 *l2) | |
451 | { | |
452 | u_char d = data[0] & ~0x10; | |
453 | ||
454 | return test_bit(FLG_MOD128, &l2->flag) ? d == SABME : d == SABM; | |
455 | } | |
456 | ||
457 | inline int | |
458 | IsREJ(u_char *data, struct layer2 *l2) | |
459 | { | |
460 | return test_bit(FLG_MOD128, &l2->flag) ? | |
461 | data[0] == REJ : (data[0] & 0xf) == REJ; | |
462 | } | |
463 | ||
464 | inline int | |
465 | IsFRMR(u_char *data) | |
466 | { | |
467 | return (data[0] & 0xef) == FRMR; | |
468 | } | |
469 | ||
470 | inline int | |
471 | IsRNR(u_char *data, struct layer2 *l2) | |
472 | { | |
473 | return test_bit(FLG_MOD128, &l2->flag) ? | |
474 | data[0] == RNR : (data[0] & 0xf) == RNR; | |
475 | } | |
476 | ||
5b834354 | 477 | static int |
1b2b03f8 KK |
478 | iframe_error(struct layer2 *l2, struct sk_buff *skb) |
479 | { | |
480 | u_int i; | |
481 | int rsp = *skb->data & 0x2; | |
482 | ||
483 | i = l2addrsize(l2) + (test_bit(FLG_MOD128, &l2->flag) ? 2 : 1); | |
484 | if (test_bit(FLG_ORIG, &l2->flag)) | |
485 | rsp = !rsp; | |
486 | if (rsp) | |
487 | return 'L'; | |
488 | if (skb->len < i) | |
489 | return 'N'; | |
490 | if ((skb->len - i) > l2->maxlen) | |
491 | return 'O'; | |
492 | return 0; | |
493 | } | |
494 | ||
5b834354 | 495 | static int |
1b2b03f8 KK |
496 | super_error(struct layer2 *l2, struct sk_buff *skb) |
497 | { | |
498 | if (skb->len != l2addrsize(l2) + | |
499 | (test_bit(FLG_MOD128, &l2->flag) ? 2 : 1)) | |
500 | return 'N'; | |
501 | return 0; | |
502 | } | |
503 | ||
5b834354 | 504 | static int |
1b2b03f8 KK |
505 | unnum_error(struct layer2 *l2, struct sk_buff *skb, int wantrsp) |
506 | { | |
507 | int rsp = (*skb->data & 0x2) >> 1; | |
508 | if (test_bit(FLG_ORIG, &l2->flag)) | |
509 | rsp = !rsp; | |
510 | if (rsp != wantrsp) | |
511 | return 'L'; | |
512 | if (skb->len != l2addrsize(l2) + 1) | |
513 | return 'N'; | |
514 | return 0; | |
515 | } | |
516 | ||
5b834354 | 517 | static int |
1b2b03f8 KK |
518 | UI_error(struct layer2 *l2, struct sk_buff *skb) |
519 | { | |
520 | int rsp = *skb->data & 0x2; | |
521 | if (test_bit(FLG_ORIG, &l2->flag)) | |
522 | rsp = !rsp; | |
523 | if (rsp) | |
524 | return 'L'; | |
525 | if (skb->len > l2->maxlen + l2addrsize(l2) + 1) | |
526 | return 'O'; | |
527 | return 0; | |
528 | } | |
529 | ||
5b834354 | 530 | static int |
1b2b03f8 KK |
531 | FRMR_error(struct layer2 *l2, struct sk_buff *skb) |
532 | { | |
533 | u_int headers = l2addrsize(l2) + 1; | |
534 | u_char *datap = skb->data + headers; | |
535 | int rsp = *skb->data & 0x2; | |
536 | ||
537 | if (test_bit(FLG_ORIG, &l2->flag)) | |
538 | rsp = !rsp; | |
539 | if (!rsp) | |
540 | return 'L'; | |
541 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
542 | if (skb->len < headers + 5) | |
543 | return 'N'; | |
544 | else if (*debug & DEBUG_L2) | |
545 | l2m_debug(&l2->l2m, | |
546 | "FRMR information %2x %2x %2x %2x %2x", | |
547 | datap[0], datap[1], datap[2], datap[3], datap[4]); | |
548 | } else { | |
549 | if (skb->len < headers + 3) | |
550 | return 'N'; | |
551 | else if (*debug & DEBUG_L2) | |
552 | l2m_debug(&l2->l2m, | |
553 | "FRMR information %2x %2x %2x", | |
554 | datap[0], datap[1], datap[2]); | |
555 | } | |
556 | return 0; | |
557 | } | |
558 | ||
559 | static unsigned int | |
560 | legalnr(struct layer2 *l2, unsigned int nr) | |
561 | { | |
562 | if (test_bit(FLG_MOD128, &l2->flag)) | |
563 | return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128); | |
564 | else | |
565 | return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8); | |
566 | } | |
567 | ||
568 | static void | |
569 | setva(struct layer2 *l2, unsigned int nr) | |
570 | { | |
571 | struct sk_buff *skb; | |
572 | ||
573 | while (l2->va != nr) { | |
574 | l2->va++; | |
575 | if (test_bit(FLG_MOD128, &l2->flag)) | |
576 | l2->va %= 128; | |
577 | else | |
578 | l2->va %= 8; | |
579 | if (l2->windowar[l2->sow]) { | |
580 | skb_trim(l2->windowar[l2->sow], 0); | |
581 | skb_queue_tail(&l2->tmp_queue, l2->windowar[l2->sow]); | |
582 | l2->windowar[l2->sow] = NULL; | |
583 | } | |
584 | l2->sow = (l2->sow + 1) % l2->window; | |
585 | } | |
586 | skb = skb_dequeue(&l2->tmp_queue); | |
587 | while (skb) { | |
588 | dev_kfree_skb(skb); | |
589 | skb = skb_dequeue(&l2->tmp_queue); | |
590 | } | |
591 | } | |
592 | ||
593 | static void | |
594 | send_uframe(struct layer2 *l2, struct sk_buff *skb, u_char cmd, u_char cr) | |
595 | { | |
596 | u_char tmp[MAX_L2HEADER_LEN]; | |
597 | int i; | |
598 | ||
599 | i = sethdraddr(l2, tmp, cr); | |
600 | tmp[i++] = cmd; | |
601 | if (skb) | |
602 | skb_trim(skb, 0); | |
603 | else { | |
604 | skb = mI_alloc_skb(i, GFP_ATOMIC); | |
605 | if (!skb) { | |
606 | printk(KERN_WARNING "%s: can't alloc skbuff\n", | |
607 | __func__); | |
608 | return; | |
609 | } | |
610 | } | |
611 | memcpy(skb_put(skb, i), tmp, i); | |
612 | enqueue_super(l2, skb); | |
613 | } | |
614 | ||
615 | ||
616 | inline u_char | |
617 | get_PollFlag(struct layer2 *l2, struct sk_buff *skb) | |
618 | { | |
619 | return skb->data[l2addrsize(l2)] & 0x10; | |
620 | } | |
621 | ||
622 | inline u_char | |
623 | get_PollFlagFree(struct layer2 *l2, struct sk_buff *skb) | |
624 | { | |
625 | u_char PF; | |
626 | ||
627 | PF = get_PollFlag(l2, skb); | |
628 | dev_kfree_skb(skb); | |
629 | return PF; | |
630 | } | |
631 | ||
632 | inline void | |
633 | start_t200(struct layer2 *l2, int i) | |
634 | { | |
635 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, i); | |
636 | test_and_set_bit(FLG_T200_RUN, &l2->flag); | |
637 | } | |
638 | ||
639 | inline void | |
640 | restart_t200(struct layer2 *l2, int i) | |
641 | { | |
642 | mISDN_FsmRestartTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, i); | |
643 | test_and_set_bit(FLG_T200_RUN, &l2->flag); | |
644 | } | |
645 | ||
646 | inline void | |
647 | stop_t200(struct layer2 *l2, int i) | |
648 | { | |
649 | if (test_and_clear_bit(FLG_T200_RUN, &l2->flag)) | |
650 | mISDN_FsmDelTimer(&l2->t200, i); | |
651 | } | |
652 | ||
653 | inline void | |
654 | st5_dl_release_l2l3(struct layer2 *l2) | |
655 | { | |
656 | int pr; | |
657 | ||
658 | if (test_and_clear_bit(FLG_PEND_REL, &l2->flag)) | |
659 | pr = DL_RELEASE_CNF; | |
660 | else | |
661 | pr = DL_RELEASE_IND; | |
662 | l2up_create(l2, pr, 0, NULL); | |
663 | } | |
664 | ||
665 | inline void | |
666 | lapb_dl_release_l2l3(struct layer2 *l2, int f) | |
667 | { | |
668 | if (test_bit(FLG_LAPB, &l2->flag)) | |
669 | l2down_create(l2, PH_DEACTIVATE_REQ, l2_newid(l2), 0, NULL); | |
670 | l2up_create(l2, f, 0, NULL); | |
671 | } | |
672 | ||
673 | static void | |
674 | establishlink(struct FsmInst *fi) | |
675 | { | |
676 | struct layer2 *l2 = fi->userdata; | |
677 | u_char cmd; | |
678 | ||
679 | clear_exception(l2); | |
680 | l2->rc = 0; | |
681 | cmd = (test_bit(FLG_MOD128, &l2->flag) ? SABME : SABM) | 0x10; | |
682 | send_uframe(l2, NULL, cmd, CMD); | |
683 | mISDN_FsmDelTimer(&l2->t203, 1); | |
684 | restart_t200(l2, 1); | |
685 | test_and_clear_bit(FLG_PEND_REL, &l2->flag); | |
686 | freewin(l2); | |
687 | mISDN_FsmChangeState(fi, ST_L2_5); | |
688 | } | |
689 | ||
690 | static void | |
691 | l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg) | |
692 | { | |
693 | struct sk_buff *skb = arg; | |
694 | struct layer2 *l2 = fi->userdata; | |
695 | ||
696 | if (get_PollFlagFree(l2, skb)) | |
697 | l2mgr(l2, MDL_ERROR_IND, (void *) 'C'); | |
698 | else | |
699 | l2mgr(l2, MDL_ERROR_IND, (void *) 'D'); | |
700 | ||
701 | } | |
702 | ||
703 | static void | |
704 | l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg) | |
705 | { | |
706 | struct sk_buff *skb = arg; | |
707 | struct layer2 *l2 = fi->userdata; | |
708 | ||
709 | if (get_PollFlagFree(l2, skb)) | |
710 | l2mgr(l2, MDL_ERROR_IND, (void *) 'B'); | |
711 | else { | |
712 | l2mgr(l2, MDL_ERROR_IND, (void *) 'E'); | |
713 | establishlink(fi); | |
714 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
715 | } | |
716 | } | |
717 | ||
718 | static void | |
719 | l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg) | |
720 | { | |
721 | struct sk_buff *skb = arg; | |
722 | struct layer2 *l2 = fi->userdata; | |
723 | ||
724 | if (get_PollFlagFree(l2, skb)) | |
725 | l2mgr(l2, MDL_ERROR_IND, (void *) 'B'); | |
726 | else | |
727 | l2mgr(l2, MDL_ERROR_IND, (void *) 'E'); | |
728 | establishlink(fi); | |
729 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
730 | } | |
731 | ||
732 | static void | |
733 | l2_go_st3(struct FsmInst *fi, int event, void *arg) | |
734 | { | |
735 | dev_kfree_skb((struct sk_buff *)arg); | |
736 | mISDN_FsmChangeState(fi, ST_L2_3); | |
737 | } | |
738 | ||
739 | static void | |
740 | l2_mdl_assign(struct FsmInst *fi, int event, void *arg) | |
741 | { | |
742 | struct layer2 *l2 = fi->userdata; | |
743 | ||
744 | mISDN_FsmChangeState(fi, ST_L2_3); | |
745 | dev_kfree_skb((struct sk_buff *)arg); | |
746 | l2_tei(l2, MDL_ASSIGN_IND, 0); | |
747 | } | |
748 | ||
749 | static void | |
750 | l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg) | |
751 | { | |
752 | struct layer2 *l2 = fi->userdata; | |
753 | struct sk_buff *skb = arg; | |
754 | ||
755 | skb_queue_tail(&l2->ui_queue, skb); | |
756 | mISDN_FsmChangeState(fi, ST_L2_2); | |
757 | l2_tei(l2, MDL_ASSIGN_IND, 0); | |
758 | } | |
759 | ||
760 | static void | |
761 | l2_queue_ui(struct FsmInst *fi, int event, void *arg) | |
762 | { | |
763 | struct layer2 *l2 = fi->userdata; | |
764 | struct sk_buff *skb = arg; | |
765 | ||
766 | skb_queue_tail(&l2->ui_queue, skb); | |
767 | } | |
768 | ||
769 | static void | |
770 | tx_ui(struct layer2 *l2) | |
771 | { | |
772 | struct sk_buff *skb; | |
773 | u_char header[MAX_L2HEADER_LEN]; | |
774 | int i; | |
775 | ||
776 | i = sethdraddr(l2, header, CMD); | |
777 | if (test_bit(FLG_LAPD_NET, &l2->flag)) | |
778 | header[1] = 0xff; /* tei 127 */ | |
779 | header[i++] = UI; | |
780 | while ((skb = skb_dequeue(&l2->ui_queue))) { | |
781 | memcpy(skb_push(skb, i), header, i); | |
782 | enqueue_ui(l2, skb); | |
783 | } | |
784 | } | |
785 | ||
786 | static void | |
787 | l2_send_ui(struct FsmInst *fi, int event, void *arg) | |
788 | { | |
789 | struct layer2 *l2 = fi->userdata; | |
790 | struct sk_buff *skb = arg; | |
791 | ||
792 | skb_queue_tail(&l2->ui_queue, skb); | |
793 | tx_ui(l2); | |
794 | } | |
795 | ||
796 | static void | |
797 | l2_got_ui(struct FsmInst *fi, int event, void *arg) | |
798 | { | |
799 | struct layer2 *l2 = fi->userdata; | |
800 | struct sk_buff *skb = arg; | |
801 | ||
802 | skb_pull(skb, l2headersize(l2, 1)); | |
803 | /* | |
804 | * in states 1-3 for broadcast | |
805 | */ | |
806 | ||
807 | if (l2->tm) | |
808 | l2_tei(l2, MDL_STATUS_UI_IND, 0); | |
809 | l2up(l2, DL_UNITDATA_IND, skb); | |
810 | } | |
811 | ||
812 | static void | |
813 | l2_establish(struct FsmInst *fi, int event, void *arg) | |
814 | { | |
815 | struct sk_buff *skb = arg; | |
816 | struct layer2 *l2 = fi->userdata; | |
817 | ||
818 | establishlink(fi); | |
819 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
820 | dev_kfree_skb(skb); | |
821 | } | |
822 | ||
823 | static void | |
824 | l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg) | |
825 | { | |
826 | struct sk_buff *skb = arg; | |
827 | struct layer2 *l2 = fi->userdata; | |
828 | ||
829 | skb_queue_purge(&l2->i_queue); | |
830 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
831 | test_and_clear_bit(FLG_PEND_REL, &l2->flag); | |
832 | dev_kfree_skb(skb); | |
833 | } | |
834 | ||
835 | static void | |
836 | l2_l3_reestablish(struct FsmInst *fi, int event, void *arg) | |
837 | { | |
838 | struct sk_buff *skb = arg; | |
839 | struct layer2 *l2 = fi->userdata; | |
840 | ||
841 | skb_queue_purge(&l2->i_queue); | |
842 | establishlink(fi); | |
843 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
844 | dev_kfree_skb(skb); | |
845 | } | |
846 | ||
847 | static void | |
848 | l2_release(struct FsmInst *fi, int event, void *arg) | |
849 | { | |
850 | struct layer2 *l2 = fi->userdata; | |
851 | struct sk_buff *skb = arg; | |
852 | ||
853 | skb_trim(skb, 0); | |
854 | l2up(l2, DL_RELEASE_CNF, skb); | |
855 | } | |
856 | ||
857 | static void | |
858 | l2_pend_rel(struct FsmInst *fi, int event, void *arg) | |
859 | { | |
860 | struct sk_buff *skb = arg; | |
861 | struct layer2 *l2 = fi->userdata; | |
862 | ||
863 | test_and_set_bit(FLG_PEND_REL, &l2->flag); | |
864 | dev_kfree_skb(skb); | |
865 | } | |
866 | ||
867 | static void | |
868 | l2_disconnect(struct FsmInst *fi, int event, void *arg) | |
869 | { | |
870 | struct layer2 *l2 = fi->userdata; | |
871 | struct sk_buff *skb = arg; | |
872 | ||
873 | skb_queue_purge(&l2->i_queue); | |
874 | freewin(l2); | |
875 | mISDN_FsmChangeState(fi, ST_L2_6); | |
876 | l2->rc = 0; | |
877 | send_uframe(l2, NULL, DISC | 0x10, CMD); | |
878 | mISDN_FsmDelTimer(&l2->t203, 1); | |
879 | restart_t200(l2, 2); | |
880 | if (skb) | |
881 | dev_kfree_skb(skb); | |
882 | } | |
883 | ||
884 | static void | |
885 | l2_start_multi(struct FsmInst *fi, int event, void *arg) | |
886 | { | |
887 | struct layer2 *l2 = fi->userdata; | |
888 | struct sk_buff *skb = arg; | |
889 | ||
890 | l2->vs = 0; | |
891 | l2->va = 0; | |
892 | l2->vr = 0; | |
893 | l2->sow = 0; | |
894 | clear_exception(l2); | |
895 | send_uframe(l2, NULL, UA | get_PollFlag(l2, skb), RSP); | |
896 | mISDN_FsmChangeState(fi, ST_L2_7); | |
897 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 3); | |
898 | skb_trim(skb, 0); | |
899 | l2up(l2, DL_ESTABLISH_IND, skb); | |
900 | if (l2->tm) | |
901 | l2_tei(l2, MDL_STATUS_UP_IND, 0); | |
902 | } | |
903 | ||
904 | static void | |
905 | l2_send_UA(struct FsmInst *fi, int event, void *arg) | |
906 | { | |
907 | struct layer2 *l2 = fi->userdata; | |
908 | struct sk_buff *skb = arg; | |
909 | ||
910 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); | |
911 | } | |
912 | ||
913 | static void | |
914 | l2_send_DM(struct FsmInst *fi, int event, void *arg) | |
915 | { | |
916 | struct layer2 *l2 = fi->userdata; | |
917 | struct sk_buff *skb = arg; | |
918 | ||
919 | send_uframe(l2, skb, DM | get_PollFlag(l2, skb), RSP); | |
920 | } | |
921 | ||
922 | static void | |
923 | l2_restart_multi(struct FsmInst *fi, int event, void *arg) | |
924 | { | |
925 | struct layer2 *l2 = fi->userdata; | |
926 | struct sk_buff *skb = arg; | |
927 | int est = 0; | |
928 | ||
929 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); | |
930 | ||
931 | l2mgr(l2, MDL_ERROR_IND, (void *) 'F'); | |
932 | ||
933 | if (l2->vs != l2->va) { | |
934 | skb_queue_purge(&l2->i_queue); | |
935 | est = 1; | |
936 | } | |
937 | ||
938 | clear_exception(l2); | |
939 | l2->vs = 0; | |
940 | l2->va = 0; | |
941 | l2->vr = 0; | |
942 | l2->sow = 0; | |
943 | mISDN_FsmChangeState(fi, ST_L2_7); | |
944 | stop_t200(l2, 3); | |
945 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 3); | |
946 | ||
947 | if (est) | |
948 | l2up_create(l2, DL_ESTABLISH_IND, 0, NULL); | |
949 | /* mISDN_queue_data(&l2->inst, l2->inst.id | MSG_BROADCAST, | |
950 | * MGR_SHORTSTATUS | INDICATION, SSTATUS_L2_ESTABLISHED, | |
951 | * 0, NULL, 0); | |
952 | */ | |
953 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) | |
954 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
955 | } | |
956 | ||
957 | static void | |
958 | l2_stop_multi(struct FsmInst *fi, int event, void *arg) | |
959 | { | |
960 | struct layer2 *l2 = fi->userdata; | |
961 | struct sk_buff *skb = arg; | |
962 | ||
963 | mISDN_FsmChangeState(fi, ST_L2_4); | |
964 | mISDN_FsmDelTimer(&l2->t203, 3); | |
965 | stop_t200(l2, 4); | |
966 | ||
967 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); | |
968 | skb_queue_purge(&l2->i_queue); | |
969 | freewin(l2); | |
970 | lapb_dl_release_l2l3(l2, DL_RELEASE_IND); | |
971 | if (l2->tm) | |
972 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
973 | } | |
974 | ||
975 | static void | |
976 | l2_connected(struct FsmInst *fi, int event, void *arg) | |
977 | { | |
978 | struct layer2 *l2 = fi->userdata; | |
979 | struct sk_buff *skb = arg; | |
980 | int pr = -1; | |
981 | ||
982 | if (!get_PollFlag(l2, skb)) { | |
983 | l2_mdl_error_ua(fi, event, arg); | |
984 | return; | |
985 | } | |
986 | dev_kfree_skb(skb); | |
987 | if (test_and_clear_bit(FLG_PEND_REL, &l2->flag)) | |
988 | l2_disconnect(fi, event, NULL); | |
989 | if (test_and_clear_bit(FLG_L3_INIT, &l2->flag)) { | |
990 | pr = DL_ESTABLISH_CNF; | |
991 | } else if (l2->vs != l2->va) { | |
992 | skb_queue_purge(&l2->i_queue); | |
993 | pr = DL_ESTABLISH_IND; | |
994 | } | |
995 | stop_t200(l2, 5); | |
996 | l2->vr = 0; | |
997 | l2->vs = 0; | |
998 | l2->va = 0; | |
999 | l2->sow = 0; | |
1000 | mISDN_FsmChangeState(fi, ST_L2_7); | |
1001 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 4); | |
1002 | if (pr != -1) | |
1003 | l2up_create(l2, pr, 0, NULL); | |
1004 | ||
1005 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) | |
1006 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1007 | ||
1008 | if (l2->tm) | |
1009 | l2_tei(l2, MDL_STATUS_UP_IND, 0); | |
1010 | } | |
1011 | ||
1012 | static void | |
1013 | l2_released(struct FsmInst *fi, int event, void *arg) | |
1014 | { | |
1015 | struct layer2 *l2 = fi->userdata; | |
1016 | struct sk_buff *skb = arg; | |
1017 | ||
1018 | if (!get_PollFlag(l2, skb)) { | |
1019 | l2_mdl_error_ua(fi, event, arg); | |
1020 | return; | |
1021 | } | |
1022 | dev_kfree_skb(skb); | |
1023 | stop_t200(l2, 6); | |
1024 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); | |
1025 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1026 | if (l2->tm) | |
1027 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1028 | } | |
1029 | ||
1030 | static void | |
1031 | l2_reestablish(struct FsmInst *fi, int event, void *arg) | |
1032 | { | |
1033 | struct layer2 *l2 = fi->userdata; | |
1034 | struct sk_buff *skb = arg; | |
1035 | ||
1036 | if (!get_PollFlagFree(l2, skb)) { | |
1037 | establishlink(fi); | |
1038 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | static void | |
1043 | l2_st5_dm_release(struct FsmInst *fi, int event, void *arg) | |
1044 | { | |
1045 | struct layer2 *l2 = fi->userdata; | |
1046 | struct sk_buff *skb = arg; | |
1047 | ||
1048 | if (get_PollFlagFree(l2, skb)) { | |
1049 | stop_t200(l2, 7); | |
1050 | if (!test_bit(FLG_L3_INIT, &l2->flag)) | |
1051 | skb_queue_purge(&l2->i_queue); | |
1052 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1053 | l2down_create(l2, PH_DEACTIVATE_REQ, | |
1054 | l2_newid(l2), 0, NULL); | |
1055 | st5_dl_release_l2l3(l2); | |
1056 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1057 | if (l2->tm) | |
1058 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1059 | } | |
1060 | } | |
1061 | ||
1062 | static void | |
1063 | l2_st6_dm_release(struct FsmInst *fi, int event, void *arg) | |
1064 | { | |
1065 | struct layer2 *l2 = fi->userdata; | |
1066 | struct sk_buff *skb = arg; | |
1067 | ||
1068 | if (get_PollFlagFree(l2, skb)) { | |
1069 | stop_t200(l2, 8); | |
1070 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); | |
1071 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1072 | if (l2->tm) | |
1073 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1074 | } | |
1075 | } | |
1076 | ||
5b834354 | 1077 | static void |
1b2b03f8 KK |
1078 | enquiry_cr(struct layer2 *l2, u_char typ, u_char cr, u_char pf) |
1079 | { | |
1080 | struct sk_buff *skb; | |
1081 | u_char tmp[MAX_L2HEADER_LEN]; | |
1082 | int i; | |
1083 | ||
1084 | i = sethdraddr(l2, tmp, cr); | |
1085 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1086 | tmp[i++] = typ; | |
1087 | tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0); | |
1088 | } else | |
1089 | tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0); | |
1090 | skb = mI_alloc_skb(i, GFP_ATOMIC); | |
1091 | if (!skb) { | |
1092 | printk(KERN_WARNING | |
1093 | "isdnl2 can't alloc sbbuff for enquiry_cr\n"); | |
1094 | return; | |
1095 | } | |
1096 | memcpy(skb_put(skb, i), tmp, i); | |
1097 | enqueue_super(l2, skb); | |
1098 | } | |
1099 | ||
1100 | inline void | |
1101 | enquiry_response(struct layer2 *l2) | |
1102 | { | |
1103 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) | |
1104 | enquiry_cr(l2, RNR, RSP, 1); | |
1105 | else | |
1106 | enquiry_cr(l2, RR, RSP, 1); | |
1107 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1108 | } | |
1109 | ||
1110 | inline void | |
1111 | transmit_enquiry(struct layer2 *l2) | |
1112 | { | |
1113 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) | |
1114 | enquiry_cr(l2, RNR, CMD, 1); | |
1115 | else | |
1116 | enquiry_cr(l2, RR, CMD, 1); | |
1117 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1118 | start_t200(l2, 9); | |
1119 | } | |
1120 | ||
1121 | ||
1122 | static void | |
1123 | nrerrorrecovery(struct FsmInst *fi) | |
1124 | { | |
1125 | struct layer2 *l2 = fi->userdata; | |
1126 | ||
1127 | l2mgr(l2, MDL_ERROR_IND, (void *) 'J'); | |
1128 | establishlink(fi); | |
1129 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1130 | } | |
1131 | ||
1132 | static void | |
1133 | invoke_retransmission(struct layer2 *l2, unsigned int nr) | |
1134 | { | |
1135 | u_int p1; | |
1136 | ||
1137 | if (l2->vs != nr) { | |
1138 | while (l2->vs != nr) { | |
1139 | (l2->vs)--; | |
1140 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1141 | l2->vs %= 128; | |
1142 | p1 = (l2->vs - l2->va) % 128; | |
1143 | } else { | |
1144 | l2->vs %= 8; | |
1145 | p1 = (l2->vs - l2->va) % 8; | |
1146 | } | |
1147 | p1 = (p1 + l2->sow) % l2->window; | |
1148 | if (l2->windowar[p1]) | |
1149 | skb_queue_head(&l2->i_queue, l2->windowar[p1]); | |
1150 | else | |
1151 | printk(KERN_WARNING | |
1152 | "%s: windowar[%d] is NULL\n", | |
1153 | __func__, p1); | |
1154 | l2->windowar[p1] = NULL; | |
1155 | } | |
1156 | mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL); | |
1157 | } | |
1158 | } | |
1159 | ||
1160 | static void | |
1161 | l2_st7_got_super(struct FsmInst *fi, int event, void *arg) | |
1162 | { | |
1163 | struct layer2 *l2 = fi->userdata; | |
1164 | struct sk_buff *skb = arg; | |
1165 | int PollFlag, rsp, typ = RR; | |
1166 | unsigned int nr; | |
1167 | ||
1168 | rsp = *skb->data & 0x2; | |
1169 | if (test_bit(FLG_ORIG, &l2->flag)) | |
1170 | rsp = !rsp; | |
1171 | ||
1172 | skb_pull(skb, l2addrsize(l2)); | |
1173 | if (IsRNR(skb->data, l2)) { | |
1174 | set_peer_busy(l2); | |
1175 | typ = RNR; | |
1176 | } else | |
1177 | clear_peer_busy(l2); | |
1178 | if (IsREJ(skb->data, l2)) | |
1179 | typ = REJ; | |
1180 | ||
1181 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1182 | PollFlag = (skb->data[1] & 0x1) == 0x1; | |
1183 | nr = skb->data[1] >> 1; | |
1184 | } else { | |
1185 | PollFlag = (skb->data[0] & 0x10); | |
1186 | nr = (skb->data[0] >> 5) & 0x7; | |
1187 | } | |
1188 | dev_kfree_skb(skb); | |
1189 | ||
1190 | if (PollFlag) { | |
1191 | if (rsp) | |
1192 | l2mgr(l2, MDL_ERROR_IND, (void *) 'A'); | |
1193 | else | |
1194 | enquiry_response(l2); | |
1195 | } | |
1196 | if (legalnr(l2, nr)) { | |
1197 | if (typ == REJ) { | |
1198 | setva(l2, nr); | |
1199 | invoke_retransmission(l2, nr); | |
1200 | stop_t200(l2, 10); | |
1201 | if (mISDN_FsmAddTimer(&l2->t203, l2->T203, | |
1202 | EV_L2_T203, NULL, 6)) | |
1203 | l2m_debug(&l2->l2m, "Restart T203 ST7 REJ"); | |
1204 | } else if ((nr == l2->vs) && (typ == RR)) { | |
1205 | setva(l2, nr); | |
1206 | stop_t200(l2, 11); | |
1207 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, | |
1208 | EV_L2_T203, NULL, 7); | |
1209 | } else if ((l2->va != nr) || (typ == RNR)) { | |
1210 | setva(l2, nr); | |
1211 | if (typ != RR) | |
1212 | mISDN_FsmDelTimer(&l2->t203, 9); | |
1213 | restart_t200(l2, 12); | |
1214 | } | |
1215 | if (skb_queue_len(&l2->i_queue) && (typ == RR)) | |
1216 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1217 | } else | |
1218 | nrerrorrecovery(fi); | |
1219 | } | |
1220 | ||
1221 | static void | |
1222 | l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg) | |
1223 | { | |
1224 | struct layer2 *l2 = fi->userdata; | |
1225 | struct sk_buff *skb = arg; | |
1226 | ||
1227 | if (!test_bit(FLG_L3_INIT, &l2->flag)) | |
1228 | skb_queue_tail(&l2->i_queue, skb); | |
1229 | else | |
1230 | dev_kfree_skb(skb); | |
1231 | } | |
1232 | ||
1233 | static void | |
1234 | l2_feed_i_pull(struct FsmInst *fi, int event, void *arg) | |
1235 | { | |
1236 | struct layer2 *l2 = fi->userdata; | |
1237 | struct sk_buff *skb = arg; | |
1238 | ||
1239 | skb_queue_tail(&l2->i_queue, skb); | |
1240 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1241 | } | |
1242 | ||
1243 | static void | |
1244 | l2_feed_iqueue(struct FsmInst *fi, int event, void *arg) | |
1245 | { | |
1246 | struct layer2 *l2 = fi->userdata; | |
1247 | struct sk_buff *skb = arg; | |
1248 | ||
1249 | skb_queue_tail(&l2->i_queue, skb); | |
1250 | } | |
1251 | ||
1252 | static void | |
1253 | l2_got_iframe(struct FsmInst *fi, int event, void *arg) | |
1254 | { | |
1255 | struct layer2 *l2 = fi->userdata; | |
1256 | struct sk_buff *skb = arg; | |
1257 | int PollFlag, i; | |
1258 | u_int ns, nr; | |
1259 | ||
1260 | i = l2addrsize(l2); | |
1261 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1262 | PollFlag = ((skb->data[i + 1] & 0x1) == 0x1); | |
1263 | ns = skb->data[i] >> 1; | |
1264 | nr = (skb->data[i + 1] >> 1) & 0x7f; | |
1265 | } else { | |
1266 | PollFlag = (skb->data[i] & 0x10); | |
1267 | ns = (skb->data[i] >> 1) & 0x7; | |
1268 | nr = (skb->data[i] >> 5) & 0x7; | |
1269 | } | |
1270 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) { | |
1271 | dev_kfree_skb(skb); | |
1272 | if (PollFlag) | |
1273 | enquiry_response(l2); | |
1274 | } else { | |
1275 | if (l2->vr == ns) { | |
1276 | l2->vr++; | |
1277 | if (test_bit(FLG_MOD128, &l2->flag)) | |
1278 | l2->vr %= 128; | |
1279 | else | |
1280 | l2->vr %= 8; | |
1281 | test_and_clear_bit(FLG_REJEXC, &l2->flag); | |
1282 | if (PollFlag) | |
1283 | enquiry_response(l2); | |
1284 | else | |
1285 | test_and_set_bit(FLG_ACK_PEND, &l2->flag); | |
1286 | skb_pull(skb, l2headersize(l2, 0)); | |
1287 | l2up(l2, DL_DATA_IND, skb); | |
1288 | } else { | |
1289 | /* n(s)!=v(r) */ | |
1290 | dev_kfree_skb(skb); | |
1291 | if (test_and_set_bit(FLG_REJEXC, &l2->flag)) { | |
1292 | if (PollFlag) | |
1293 | enquiry_response(l2); | |
1294 | } else { | |
1295 | enquiry_cr(l2, REJ, RSP, PollFlag); | |
1296 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1297 | } | |
1298 | } | |
1299 | } | |
1300 | if (legalnr(l2, nr)) { | |
1301 | if (!test_bit(FLG_PEER_BUSY, &l2->flag) && | |
1302 | (fi->state == ST_L2_7)) { | |
1303 | if (nr == l2->vs) { | |
1304 | stop_t200(l2, 13); | |
1305 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, | |
1306 | EV_L2_T203, NULL, 7); | |
1307 | } else if (nr != l2->va) | |
1308 | restart_t200(l2, 14); | |
1309 | } | |
1310 | setva(l2, nr); | |
1311 | } else { | |
1312 | nrerrorrecovery(fi); | |
1313 | return; | |
1314 | } | |
1315 | if (skb_queue_len(&l2->i_queue) && (fi->state == ST_L2_7)) | |
1316 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1317 | if (test_and_clear_bit(FLG_ACK_PEND, &l2->flag)) | |
1318 | enquiry_cr(l2, RR, RSP, 0); | |
1319 | } | |
1320 | ||
1321 | static void | |
1322 | l2_got_tei(struct FsmInst *fi, int event, void *arg) | |
1323 | { | |
1324 | struct layer2 *l2 = fi->userdata; | |
1325 | u_int info; | |
1326 | ||
1327 | l2->tei = (signed char)(long)arg; | |
1328 | set_channel_address(&l2->ch, l2->sapi, l2->tei); | |
1329 | info = DL_INFO_L2_CONNECT; | |
1330 | l2up_create(l2, DL_INFORMATION_IND, sizeof(info), &info); | |
1331 | if (fi->state == ST_L2_3) { | |
1332 | establishlink(fi); | |
1333 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
1334 | } else | |
1335 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1336 | if (skb_queue_len(&l2->ui_queue)) | |
1337 | tx_ui(l2); | |
1338 | } | |
1339 | ||
1340 | static void | |
1341 | l2_st5_tout_200(struct FsmInst *fi, int event, void *arg) | |
1342 | { | |
1343 | struct layer2 *l2 = fi->userdata; | |
1344 | ||
1345 | if (test_bit(FLG_LAPD, &l2->flag) && | |
1346 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { | |
1347 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); | |
1348 | } else if (l2->rc == l2->N200) { | |
1349 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1350 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1351 | skb_queue_purge(&l2->i_queue); | |
1352 | l2mgr(l2, MDL_ERROR_IND, (void *) 'G'); | |
1353 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1354 | l2down_create(l2, PH_DEACTIVATE_REQ, | |
1355 | l2_newid(l2), 0, NULL); | |
1356 | st5_dl_release_l2l3(l2); | |
1357 | if (l2->tm) | |
1358 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1359 | } else { | |
1360 | l2->rc++; | |
1361 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); | |
1362 | send_uframe(l2, NULL, (test_bit(FLG_MOD128, &l2->flag) ? | |
1363 | SABME : SABM) | 0x10, CMD); | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | static void | |
1368 | l2_st6_tout_200(struct FsmInst *fi, int event, void *arg) | |
1369 | { | |
1370 | struct layer2 *l2 = fi->userdata; | |
1371 | ||
1372 | if (test_bit(FLG_LAPD, &l2->flag) && | |
1373 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { | |
1374 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); | |
1375 | } else if (l2->rc == l2->N200) { | |
1376 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1377 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1378 | l2mgr(l2, MDL_ERROR_IND, (void *) 'H'); | |
1379 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); | |
1380 | if (l2->tm) | |
1381 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1382 | } else { | |
1383 | l2->rc++; | |
1384 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, | |
1385 | NULL, 9); | |
1386 | send_uframe(l2, NULL, DISC | 0x10, CMD); | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | static void | |
1391 | l2_st7_tout_200(struct FsmInst *fi, int event, void *arg) | |
1392 | { | |
1393 | struct layer2 *l2 = fi->userdata; | |
1394 | ||
1395 | if (test_bit(FLG_LAPD, &l2->flag) && | |
1396 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { | |
1397 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); | |
1398 | return; | |
1399 | } | |
1400 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1401 | l2->rc = 0; | |
1402 | mISDN_FsmChangeState(fi, ST_L2_8); | |
1403 | transmit_enquiry(l2); | |
1404 | l2->rc++; | |
1405 | } | |
1406 | ||
1407 | static void | |
1408 | l2_st8_tout_200(struct FsmInst *fi, int event, void *arg) | |
1409 | { | |
1410 | struct layer2 *l2 = fi->userdata; | |
1411 | ||
1412 | if (test_bit(FLG_LAPD, &l2->flag) && | |
1413 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { | |
1414 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); | |
1415 | return; | |
1416 | } | |
1417 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1418 | if (l2->rc == l2->N200) { | |
1419 | l2mgr(l2, MDL_ERROR_IND, (void *) 'I'); | |
1420 | establishlink(fi); | |
1421 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1422 | } else { | |
1423 | transmit_enquiry(l2); | |
1424 | l2->rc++; | |
1425 | } | |
1426 | } | |
1427 | ||
1428 | static void | |
1429 | l2_st7_tout_203(struct FsmInst *fi, int event, void *arg) | |
1430 | { | |
1431 | struct layer2 *l2 = fi->userdata; | |
1432 | ||
1433 | if (test_bit(FLG_LAPD, &l2->flag) && | |
1434 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { | |
1435 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 9); | |
1436 | return; | |
1437 | } | |
1438 | mISDN_FsmChangeState(fi, ST_L2_8); | |
1439 | transmit_enquiry(l2); | |
1440 | l2->rc = 0; | |
1441 | } | |
1442 | ||
1443 | static void | |
1444 | l2_pull_iqueue(struct FsmInst *fi, int event, void *arg) | |
1445 | { | |
1446 | struct layer2 *l2 = fi->userdata; | |
1447 | struct sk_buff *skb, *nskb, *oskb; | |
1448 | u_char header[MAX_L2HEADER_LEN]; | |
1449 | u_int i, p1; | |
1450 | ||
1451 | if (!cansend(l2)) | |
1452 | return; | |
1453 | ||
1454 | skb = skb_dequeue(&l2->i_queue); | |
1455 | if (!skb) | |
1456 | return; | |
1457 | ||
1458 | if (test_bit(FLG_MOD128, &l2->flag)) | |
1459 | p1 = (l2->vs - l2->va) % 128; | |
1460 | else | |
1461 | p1 = (l2->vs - l2->va) % 8; | |
1462 | p1 = (p1 + l2->sow) % l2->window; | |
1463 | if (l2->windowar[p1]) { | |
1464 | printk(KERN_WARNING "isdnl2 try overwrite ack queue entry %d\n", | |
1465 | p1); | |
1466 | dev_kfree_skb(l2->windowar[p1]); | |
1467 | } | |
1468 | l2->windowar[p1] = skb; | |
1469 | i = sethdraddr(l2, header, CMD); | |
1470 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1471 | header[i++] = l2->vs << 1; | |
1472 | header[i++] = l2->vr << 1; | |
1473 | l2->vs = (l2->vs + 1) % 128; | |
1474 | } else { | |
1475 | header[i++] = (l2->vr << 5) | (l2->vs << 1); | |
1476 | l2->vs = (l2->vs + 1) % 8; | |
1477 | } | |
1478 | ||
1479 | nskb = skb_clone(skb, GFP_ATOMIC); | |
1480 | p1 = skb_headroom(nskb); | |
1481 | if (p1 >= i) | |
1482 | memcpy(skb_push(nskb, i), header, i); | |
1483 | else { | |
1484 | printk(KERN_WARNING | |
1485 | "isdnl2 pull_iqueue skb header(%d/%d) too short\n", i, p1); | |
1486 | oskb = nskb; | |
1487 | nskb = mI_alloc_skb(oskb->len + i, GFP_ATOMIC); | |
1488 | if (!nskb) { | |
1489 | dev_kfree_skb(oskb); | |
1490 | printk(KERN_WARNING "%s: no skb mem\n", __func__); | |
1491 | return; | |
1492 | } | |
1493 | memcpy(skb_put(nskb, i), header, i); | |
1494 | memcpy(skb_put(nskb, oskb->len), oskb->data, oskb->len); | |
1495 | dev_kfree_skb(oskb); | |
1496 | } | |
1497 | l2down(l2, PH_DATA_REQ, l2_newid(l2), nskb); | |
1498 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1499 | if (!test_and_set_bit(FLG_T200_RUN, &l2->flag)) { | |
1500 | mISDN_FsmDelTimer(&l2->t203, 13); | |
1501 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 11); | |
1502 | } | |
1503 | } | |
1504 | ||
1505 | static void | |
1506 | l2_st8_got_super(struct FsmInst *fi, int event, void *arg) | |
1507 | { | |
1508 | struct layer2 *l2 = fi->userdata; | |
1509 | struct sk_buff *skb = arg; | |
1510 | int PollFlag, rsp, rnr = 0; | |
1511 | unsigned int nr; | |
1512 | ||
1513 | rsp = *skb->data & 0x2; | |
1514 | if (test_bit(FLG_ORIG, &l2->flag)) | |
1515 | rsp = !rsp; | |
1516 | ||
1517 | skb_pull(skb, l2addrsize(l2)); | |
1518 | ||
1519 | if (IsRNR(skb->data, l2)) { | |
1520 | set_peer_busy(l2); | |
1521 | rnr = 1; | |
1522 | } else | |
1523 | clear_peer_busy(l2); | |
1524 | ||
1525 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1526 | PollFlag = (skb->data[1] & 0x1) == 0x1; | |
1527 | nr = skb->data[1] >> 1; | |
1528 | } else { | |
1529 | PollFlag = (skb->data[0] & 0x10); | |
1530 | nr = (skb->data[0] >> 5) & 0x7; | |
1531 | } | |
1532 | dev_kfree_skb(skb); | |
1533 | if (rsp && PollFlag) { | |
1534 | if (legalnr(l2, nr)) { | |
1535 | if (rnr) { | |
1536 | restart_t200(l2, 15); | |
1537 | } else { | |
1538 | stop_t200(l2, 16); | |
1539 | mISDN_FsmAddTimer(&l2->t203, l2->T203, | |
1540 | EV_L2_T203, NULL, 5); | |
1541 | setva(l2, nr); | |
1542 | } | |
1543 | invoke_retransmission(l2, nr); | |
1544 | mISDN_FsmChangeState(fi, ST_L2_7); | |
1545 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) | |
1546 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1547 | } else | |
1548 | nrerrorrecovery(fi); | |
1549 | } else { | |
1550 | if (!rsp && PollFlag) | |
1551 | enquiry_response(l2); | |
1552 | if (legalnr(l2, nr)) | |
1553 | setva(l2, nr); | |
1554 | else | |
1555 | nrerrorrecovery(fi); | |
1556 | } | |
1557 | } | |
1558 | ||
1559 | static void | |
1560 | l2_got_FRMR(struct FsmInst *fi, int event, void *arg) | |
1561 | { | |
1562 | struct layer2 *l2 = fi->userdata; | |
1563 | struct sk_buff *skb = arg; | |
1564 | ||
1565 | skb_pull(skb, l2addrsize(l2) + 1); | |
1566 | ||
1567 | if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */ | |
1568 | (IsUA(skb->data) && (fi->state == ST_L2_7))) { | |
1569 | l2mgr(l2, MDL_ERROR_IND, (void *) 'K'); | |
1570 | establishlink(fi); | |
1571 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1572 | } | |
1573 | dev_kfree_skb(skb); | |
1574 | } | |
1575 | ||
1576 | static void | |
1577 | l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1578 | { | |
1579 | struct layer2 *l2 = fi->userdata; | |
1580 | ||
1581 | skb_queue_purge(&l2->ui_queue); | |
1582 | l2->tei = GROUP_TEI; | |
1583 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1584 | } | |
1585 | ||
1586 | static void | |
1587 | l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1588 | { | |
1589 | struct layer2 *l2 = fi->userdata; | |
1590 | ||
1591 | skb_queue_purge(&l2->ui_queue); | |
1592 | l2->tei = GROUP_TEI; | |
1593 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); | |
1594 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1595 | } | |
1596 | ||
1597 | static void | |
1598 | l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1599 | { | |
1600 | struct layer2 *l2 = fi->userdata; | |
1601 | ||
1602 | skb_queue_purge(&l2->i_queue); | |
1603 | skb_queue_purge(&l2->ui_queue); | |
1604 | freewin(l2); | |
1605 | l2->tei = GROUP_TEI; | |
1606 | stop_t200(l2, 17); | |
1607 | st5_dl_release_l2l3(l2); | |
1608 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1609 | } | |
1610 | ||
1611 | static void | |
1612 | l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1613 | { | |
1614 | struct layer2 *l2 = fi->userdata; | |
1615 | ||
1616 | skb_queue_purge(&l2->ui_queue); | |
1617 | l2->tei = GROUP_TEI; | |
1618 | stop_t200(l2, 18); | |
1619 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); | |
1620 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1621 | } | |
1622 | ||
1623 | static void | |
1624 | l2_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1625 | { | |
1626 | struct layer2 *l2 = fi->userdata; | |
1627 | ||
1628 | skb_queue_purge(&l2->i_queue); | |
1629 | skb_queue_purge(&l2->ui_queue); | |
1630 | freewin(l2); | |
1631 | l2->tei = GROUP_TEI; | |
1632 | stop_t200(l2, 17); | |
1633 | mISDN_FsmDelTimer(&l2->t203, 19); | |
1634 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); | |
1635 | /* mISDN_queue_data(&l2->inst, l2->inst.id | MSG_BROADCAST, | |
1636 | * MGR_SHORTSTATUS_IND, SSTATUS_L2_RELEASED, | |
1637 | * 0, NULL, 0); | |
1638 | */ | |
1639 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1640 | } | |
1641 | ||
1642 | static void | |
1643 | l2_st14_persistant_da(struct FsmInst *fi, int event, void *arg) | |
1644 | { | |
1645 | struct layer2 *l2 = fi->userdata; | |
1646 | struct sk_buff *skb = arg; | |
1647 | ||
1648 | skb_queue_purge(&l2->i_queue); | |
1649 | skb_queue_purge(&l2->ui_queue); | |
1650 | if (test_and_clear_bit(FLG_ESTAB_PEND, &l2->flag)) | |
1651 | l2up(l2, DL_RELEASE_IND, skb); | |
1652 | else | |
1653 | dev_kfree_skb(skb); | |
1654 | } | |
1655 | ||
1656 | static void | |
1657 | l2_st5_persistant_da(struct FsmInst *fi, int event, void *arg) | |
1658 | { | |
1659 | struct layer2 *l2 = fi->userdata; | |
1660 | struct sk_buff *skb = arg; | |
1661 | ||
1662 | skb_queue_purge(&l2->i_queue); | |
1663 | skb_queue_purge(&l2->ui_queue); | |
1664 | freewin(l2); | |
1665 | stop_t200(l2, 19); | |
1666 | st5_dl_release_l2l3(l2); | |
1667 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1668 | if (l2->tm) | |
1669 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1670 | dev_kfree_skb(skb); | |
1671 | } | |
1672 | ||
1673 | static void | |
1674 | l2_st6_persistant_da(struct FsmInst *fi, int event, void *arg) | |
1675 | { | |
1676 | struct layer2 *l2 = fi->userdata; | |
1677 | struct sk_buff *skb = arg; | |
1678 | ||
1679 | skb_queue_purge(&l2->ui_queue); | |
1680 | stop_t200(l2, 20); | |
1681 | l2up(l2, DL_RELEASE_CNF, skb); | |
1682 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1683 | if (l2->tm) | |
1684 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1685 | } | |
1686 | ||
1687 | static void | |
1688 | l2_persistant_da(struct FsmInst *fi, int event, void *arg) | |
1689 | { | |
1690 | struct layer2 *l2 = fi->userdata; | |
1691 | struct sk_buff *skb = arg; | |
1692 | ||
1693 | skb_queue_purge(&l2->i_queue); | |
1694 | skb_queue_purge(&l2->ui_queue); | |
1695 | freewin(l2); | |
1696 | stop_t200(l2, 19); | |
1697 | mISDN_FsmDelTimer(&l2->t203, 19); | |
1698 | l2up(l2, DL_RELEASE_IND, skb); | |
1699 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1700 | if (l2->tm) | |
1701 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1702 | } | |
1703 | ||
1704 | static void | |
1705 | l2_set_own_busy(struct FsmInst *fi, int event, void *arg) | |
1706 | { | |
1707 | struct layer2 *l2 = fi->userdata; | |
1708 | struct sk_buff *skb = arg; | |
1709 | ||
1710 | if (!test_and_set_bit(FLG_OWN_BUSY, &l2->flag)) { | |
1711 | enquiry_cr(l2, RNR, RSP, 0); | |
1712 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1713 | } | |
1714 | if (skb) | |
1715 | dev_kfree_skb(skb); | |
1716 | } | |
1717 | ||
1718 | static void | |
1719 | l2_clear_own_busy(struct FsmInst *fi, int event, void *arg) | |
1720 | { | |
1721 | struct layer2 *l2 = fi->userdata; | |
1722 | struct sk_buff *skb = arg; | |
1723 | ||
1724 | if (!test_and_clear_bit(FLG_OWN_BUSY, &l2->flag)) { | |
1725 | enquiry_cr(l2, RR, RSP, 0); | |
1726 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1727 | } | |
1728 | if (skb) | |
1729 | dev_kfree_skb(skb); | |
1730 | } | |
1731 | ||
1732 | static void | |
1733 | l2_frame_error(struct FsmInst *fi, int event, void *arg) | |
1734 | { | |
1735 | struct layer2 *l2 = fi->userdata; | |
1736 | ||
1737 | l2mgr(l2, MDL_ERROR_IND, arg); | |
1738 | } | |
1739 | ||
1740 | static void | |
1741 | l2_frame_error_reest(struct FsmInst *fi, int event, void *arg) | |
1742 | { | |
1743 | struct layer2 *l2 = fi->userdata; | |
1744 | ||
1745 | l2mgr(l2, MDL_ERROR_IND, arg); | |
1746 | establishlink(fi); | |
1747 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1748 | } | |
1749 | ||
1750 | static struct FsmNode L2FnList[] = | |
1751 | { | |
1752 | {ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign}, | |
1753 | {ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3}, | |
1754 | {ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish}, | |
1755 | {ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3}, | |
1756 | {ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, | |
1757 | {ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, | |
1758 | {ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release}, | |
1759 | {ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel}, | |
1760 | {ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect}, | |
1761 | {ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect}, | |
1762 | {ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest}, | |
1763 | {ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull}, | |
1764 | {ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue}, | |
1765 | {ST_L2_1, EV_L2_DL_UNITDATA, l2_queue_ui_assign}, | |
1766 | {ST_L2_2, EV_L2_DL_UNITDATA, l2_queue_ui}, | |
1767 | {ST_L2_3, EV_L2_DL_UNITDATA, l2_queue_ui}, | |
1768 | {ST_L2_4, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1769 | {ST_L2_5, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1770 | {ST_L2_6, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1771 | {ST_L2_7, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1772 | {ST_L2_8, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1773 | {ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1774 | {ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1775 | {ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1776 | {ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove}, | |
1777 | {ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove}, | |
1778 | {ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove}, | |
1779 | {ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove}, | |
1780 | {ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove}, | |
1781 | {ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove}, | |
1782 | {ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove}, | |
1783 | {ST_L2_4, EV_L2_SABME, l2_start_multi}, | |
1784 | {ST_L2_5, EV_L2_SABME, l2_send_UA}, | |
1785 | {ST_L2_6, EV_L2_SABME, l2_send_DM}, | |
1786 | {ST_L2_7, EV_L2_SABME, l2_restart_multi}, | |
1787 | {ST_L2_8, EV_L2_SABME, l2_restart_multi}, | |
1788 | {ST_L2_4, EV_L2_DISC, l2_send_DM}, | |
1789 | {ST_L2_5, EV_L2_DISC, l2_send_DM}, | |
1790 | {ST_L2_6, EV_L2_DISC, l2_send_UA}, | |
1791 | {ST_L2_7, EV_L2_DISC, l2_stop_multi}, | |
1792 | {ST_L2_8, EV_L2_DISC, l2_stop_multi}, | |
1793 | {ST_L2_4, EV_L2_UA, l2_mdl_error_ua}, | |
1794 | {ST_L2_5, EV_L2_UA, l2_connected}, | |
1795 | {ST_L2_6, EV_L2_UA, l2_released}, | |
1796 | {ST_L2_7, EV_L2_UA, l2_mdl_error_ua}, | |
1797 | {ST_L2_8, EV_L2_UA, l2_mdl_error_ua}, | |
1798 | {ST_L2_4, EV_L2_DM, l2_reestablish}, | |
1799 | {ST_L2_5, EV_L2_DM, l2_st5_dm_release}, | |
1800 | {ST_L2_6, EV_L2_DM, l2_st6_dm_release}, | |
1801 | {ST_L2_7, EV_L2_DM, l2_mdl_error_dm}, | |
1802 | {ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm}, | |
1803 | {ST_L2_1, EV_L2_UI, l2_got_ui}, | |
1804 | {ST_L2_2, EV_L2_UI, l2_got_ui}, | |
1805 | {ST_L2_3, EV_L2_UI, l2_got_ui}, | |
1806 | {ST_L2_4, EV_L2_UI, l2_got_ui}, | |
1807 | {ST_L2_5, EV_L2_UI, l2_got_ui}, | |
1808 | {ST_L2_6, EV_L2_UI, l2_got_ui}, | |
1809 | {ST_L2_7, EV_L2_UI, l2_got_ui}, | |
1810 | {ST_L2_8, EV_L2_UI, l2_got_ui}, | |
1811 | {ST_L2_7, EV_L2_FRMR, l2_got_FRMR}, | |
1812 | {ST_L2_8, EV_L2_FRMR, l2_got_FRMR}, | |
1813 | {ST_L2_7, EV_L2_SUPER, l2_st7_got_super}, | |
1814 | {ST_L2_8, EV_L2_SUPER, l2_st8_got_super}, | |
1815 | {ST_L2_7, EV_L2_I, l2_got_iframe}, | |
1816 | {ST_L2_8, EV_L2_I, l2_got_iframe}, | |
1817 | {ST_L2_5, EV_L2_T200, l2_st5_tout_200}, | |
1818 | {ST_L2_6, EV_L2_T200, l2_st6_tout_200}, | |
1819 | {ST_L2_7, EV_L2_T200, l2_st7_tout_200}, | |
1820 | {ST_L2_8, EV_L2_T200, l2_st8_tout_200}, | |
1821 | {ST_L2_7, EV_L2_T203, l2_st7_tout_203}, | |
1822 | {ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue}, | |
1823 | {ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, | |
1824 | {ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, | |
1825 | {ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, | |
1826 | {ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, | |
1827 | {ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1828 | {ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1829 | {ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1830 | {ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest}, | |
1831 | {ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest}, | |
1832 | {ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistant_da}, | |
1833 | {ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove}, | |
1834 | {ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove}, | |
1835 | {ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistant_da}, | |
1836 | {ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistant_da}, | |
1837 | {ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistant_da}, | |
1838 | {ST_L2_7, EV_L1_DEACTIVATE, l2_persistant_da}, | |
1839 | {ST_L2_8, EV_L1_DEACTIVATE, l2_persistant_da}, | |
1840 | }; | |
1841 | ||
1b2b03f8 KK |
1842 | static int |
1843 | ph_data_indication(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb) | |
1844 | { | |
1845 | u_char *datap = skb->data; | |
1846 | int ret = -EINVAL; | |
1847 | int psapi, ptei; | |
1848 | u_int l; | |
1849 | int c = 0; | |
1850 | ||
1851 | l = l2addrsize(l2); | |
1852 | if (skb->len <= l) { | |
1853 | mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *) 'N'); | |
1854 | return ret; | |
1855 | } | |
1856 | if (test_bit(FLG_LAPD, &l2->flag)) { /* Maybe not needed */ | |
1857 | psapi = *datap++; | |
1858 | ptei = *datap++; | |
1859 | if ((psapi & 1) || !(ptei & 1)) { | |
1860 | printk(KERN_WARNING | |
1861 | "l2 D-channel frame wrong EA0/EA1\n"); | |
1862 | return ret; | |
1863 | } | |
1864 | psapi >>= 2; | |
1865 | ptei >>= 1; | |
1866 | if (psapi != l2->sapi) { | |
25985edc | 1867 | /* not our business */ |
d796509a AE |
1868 | if (*debug & DEBUG_L2) |
1869 | printk(KERN_DEBUG "%s: sapi %d/%d mismatch\n", | |
1870 | __func__, psapi, l2->sapi); | |
1b2b03f8 KK |
1871 | dev_kfree_skb(skb); |
1872 | return 0; | |
1873 | } | |
1874 | if ((ptei != l2->tei) && (ptei != GROUP_TEI)) { | |
25985edc | 1875 | /* not our business */ |
d796509a AE |
1876 | if (*debug & DEBUG_L2) |
1877 | printk(KERN_DEBUG "%s: tei %d/%d mismatch\n", | |
1878 | __func__, ptei, l2->tei); | |
1b2b03f8 KK |
1879 | dev_kfree_skb(skb); |
1880 | return 0; | |
1881 | } | |
1882 | } else | |
1883 | datap += l; | |
1884 | if (!(*datap & 1)) { /* I-Frame */ | |
1885 | c = iframe_error(l2, skb); | |
1886 | if (!c) | |
1887 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_I, skb); | |
1888 | } else if (IsSFrame(datap, l2)) { /* S-Frame */ | |
1889 | c = super_error(l2, skb); | |
1890 | if (!c) | |
1891 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_SUPER, skb); | |
1892 | } else if (IsUI(datap)) { | |
1893 | c = UI_error(l2, skb); | |
1894 | if (!c) | |
1895 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_UI, skb); | |
1896 | } else if (IsSABME(datap, l2)) { | |
1897 | c = unnum_error(l2, skb, CMD); | |
1898 | if (!c) | |
1899 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_SABME, skb); | |
1900 | } else if (IsUA(datap)) { | |
1901 | c = unnum_error(l2, skb, RSP); | |
1902 | if (!c) | |
1903 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_UA, skb); | |
1904 | } else if (IsDISC(datap)) { | |
1905 | c = unnum_error(l2, skb, CMD); | |
1906 | if (!c) | |
1907 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DISC, skb); | |
1908 | } else if (IsDM(datap)) { | |
1909 | c = unnum_error(l2, skb, RSP); | |
1910 | if (!c) | |
1911 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DM, skb); | |
1912 | } else if (IsFRMR(datap)) { | |
1913 | c = FRMR_error(l2, skb); | |
1914 | if (!c) | |
1915 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_FRMR, skb); | |
1916 | } else | |
1917 | c = 'L'; | |
1918 | if (c) { | |
1919 | printk(KERN_WARNING "l2 D-channel frame error %c\n", c); | |
1920 | mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *)(long)c); | |
1921 | } | |
1922 | return ret; | |
1923 | } | |
1924 | ||
1925 | static int | |
1926 | l2_send(struct mISDNchannel *ch, struct sk_buff *skb) | |
1927 | { | |
1928 | struct layer2 *l2 = container_of(ch, struct layer2, ch); | |
1929 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
1930 | int ret = -EINVAL; | |
1931 | ||
1932 | if (*debug & DEBUG_L2_RECV) | |
d796509a AE |
1933 | printk(KERN_DEBUG "%s: prim(%x) id(%x) sapi(%d) tei(%d)\n", |
1934 | __func__, hh->prim, hh->id, l2->sapi, l2->tei); | |
1b2b03f8 KK |
1935 | switch (hh->prim) { |
1936 | case PH_DATA_IND: | |
1937 | ret = ph_data_indication(l2, hh, skb); | |
1938 | break; | |
1939 | case PH_DATA_CNF: | |
1940 | ret = ph_data_confirm(l2, hh, skb); | |
1941 | break; | |
1942 | case PH_ACTIVATE_IND: | |
1943 | test_and_set_bit(FLG_L1_ACTIV, &l2->flag); | |
1944 | l2up_create(l2, MPH_ACTIVATE_IND, 0, NULL); | |
1945 | if (test_and_clear_bit(FLG_ESTAB_PEND, &l2->flag)) | |
1946 | ret = mISDN_FsmEvent(&l2->l2m, | |
1947 | EV_L2_DL_ESTABLISH_REQ, skb); | |
1948 | break; | |
1949 | case PH_DEACTIVATE_IND: | |
1950 | test_and_clear_bit(FLG_L1_ACTIV, &l2->flag); | |
1951 | l2up_create(l2, MPH_DEACTIVATE_IND, 0, NULL); | |
1952 | ret = mISDN_FsmEvent(&l2->l2m, EV_L1_DEACTIVATE, skb); | |
1953 | break; | |
1954 | case MPH_INFORMATION_IND: | |
1955 | if (!l2->up) | |
1956 | break; | |
1957 | ret = l2->up->send(l2->up, skb); | |
1958 | break; | |
1959 | case DL_DATA_REQ: | |
1960 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_DATA, skb); | |
1961 | break; | |
1962 | case DL_UNITDATA_REQ: | |
1963 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_UNITDATA, skb); | |
1964 | break; | |
1965 | case DL_ESTABLISH_REQ: | |
1966 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1967 | test_and_set_bit(FLG_ORIG, &l2->flag); | |
1968 | if (test_bit(FLG_L1_ACTIV, &l2->flag)) { | |
1969 | if (test_bit(FLG_LAPD, &l2->flag) || | |
1970 | test_bit(FLG_ORIG, &l2->flag)) | |
1971 | ret = mISDN_FsmEvent(&l2->l2m, | |
1972 | EV_L2_DL_ESTABLISH_REQ, skb); | |
1973 | } else { | |
1974 | if (test_bit(FLG_LAPD, &l2->flag) || | |
1975 | test_bit(FLG_ORIG, &l2->flag)) { | |
1976 | test_and_set_bit(FLG_ESTAB_PEND, | |
1977 | &l2->flag); | |
1978 | } | |
1979 | ret = l2down(l2, PH_ACTIVATE_REQ, l2_newid(l2), | |
1980 | skb); | |
1981 | } | |
1982 | break; | |
1983 | case DL_RELEASE_REQ: | |
1984 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1985 | l2down_create(l2, PH_DEACTIVATE_REQ, | |
1986 | l2_newid(l2), 0, NULL); | |
1987 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_RELEASE_REQ, | |
1988 | skb); | |
1989 | break; | |
1990 | default: | |
1991 | if (*debug & DEBUG_L2) | |
1992 | l2m_debug(&l2->l2m, "l2 unknown pr %04x", | |
1993 | hh->prim); | |
1994 | } | |
1995 | if (ret) { | |
1996 | dev_kfree_skb(skb); | |
1997 | ret = 0; | |
1998 | } | |
1999 | return ret; | |
2000 | } | |
2001 | ||
2002 | int | |
2003 | tei_l2(struct layer2 *l2, u_int cmd, u_long arg) | |
2004 | { | |
2005 | int ret = -EINVAL; | |
2006 | ||
2007 | if (*debug & DEBUG_L2_TEI) | |
2008 | printk(KERN_DEBUG "%s: cmd(%x)\n", __func__, cmd); | |
2009 | switch (cmd) { | |
2010 | case (MDL_ASSIGN_REQ): | |
2011 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ASSIGN, (void *)arg); | |
2012 | break; | |
2013 | case (MDL_REMOVE_REQ): | |
2014 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_REMOVE, NULL); | |
2015 | break; | |
2016 | case (MDL_ERROR_IND): | |
2017 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL); | |
2018 | break; | |
2019 | case (MDL_ERROR_RSP): | |
2020 | /* ETS 300-125 5.3.2.1 Test: TC13010 */ | |
2021 | printk(KERN_NOTICE "MDL_ERROR|REQ (tei_l2)\n"); | |
2022 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL); | |
2023 | break; | |
2024 | } | |
2025 | return ret; | |
2026 | } | |
2027 | ||
2028 | static void | |
2029 | release_l2(struct layer2 *l2) | |
2030 | { | |
2031 | mISDN_FsmDelTimer(&l2->t200, 21); | |
2032 | mISDN_FsmDelTimer(&l2->t203, 16); | |
2033 | skb_queue_purge(&l2->i_queue); | |
2034 | skb_queue_purge(&l2->ui_queue); | |
2035 | skb_queue_purge(&l2->down_queue); | |
2036 | ReleaseWin(l2); | |
2037 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
c5b61d59 | 2038 | TEIrelease(l2); |
1b2b03f8 KK |
2039 | if (l2->ch.st) |
2040 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, | |
2041 | CLOSE_CHANNEL, NULL); | |
2042 | } | |
2043 | kfree(l2); | |
2044 | } | |
2045 | ||
2046 | static int | |
2047 | l2_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
2048 | { | |
2049 | struct layer2 *l2 = container_of(ch, struct layer2, ch); | |
2050 | u_int info; | |
2051 | ||
2052 | if (*debug & DEBUG_L2_CTRL) | |
2053 | printk(KERN_DEBUG "%s:(%x)\n", __func__, cmd); | |
2054 | ||
2055 | switch (cmd) { | |
2056 | case OPEN_CHANNEL: | |
2057 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
2058 | set_channel_address(&l2->ch, l2->sapi, l2->tei); | |
2059 | info = DL_INFO_L2_CONNECT; | |
2060 | l2up_create(l2, DL_INFORMATION_IND, | |
2061 | sizeof(info), &info); | |
2062 | } | |
2063 | break; | |
2064 | case CLOSE_CHANNEL: | |
2065 | if (l2->ch.peer) | |
2066 | l2->ch.peer->ctrl(l2->ch.peer, CLOSE_CHANNEL, NULL); | |
2067 | release_l2(l2); | |
2068 | break; | |
2069 | } | |
2070 | return 0; | |
2071 | } | |
2072 | ||
2073 | struct layer2 * | |
5b277b86 AE |
2074 | create_l2(struct mISDNchannel *ch, u_int protocol, u_long options, int tei, |
2075 | int sapi) | |
1b2b03f8 KK |
2076 | { |
2077 | struct layer2 *l2; | |
2078 | struct channel_req rq; | |
2079 | ||
2080 | l2 = kzalloc(sizeof(struct layer2), GFP_KERNEL); | |
2081 | if (!l2) { | |
2082 | printk(KERN_ERR "kzalloc layer2 failed\n"); | |
2083 | return NULL; | |
2084 | } | |
2085 | l2->next_id = 1; | |
2086 | l2->down_id = MISDN_ID_NONE; | |
2087 | l2->up = ch; | |
2088 | l2->ch.st = ch->st; | |
2089 | l2->ch.send = l2_send; | |
2090 | l2->ch.ctrl = l2_ctrl; | |
2091 | switch (protocol) { | |
2092 | case ISDN_P_LAPD_NT: | |
2093 | test_and_set_bit(FLG_LAPD, &l2->flag); | |
2094 | test_and_set_bit(FLG_LAPD_NET, &l2->flag); | |
2095 | test_and_set_bit(FLG_MOD128, &l2->flag); | |
5b277b86 | 2096 | l2->sapi = sapi; |
1b2b03f8 KK |
2097 | l2->maxlen = MAX_DFRAME_LEN; |
2098 | if (test_bit(OPTION_L2_PMX, &options)) | |
2099 | l2->window = 7; | |
2100 | else | |
2101 | l2->window = 1; | |
2102 | if (test_bit(OPTION_L2_PTP, &options)) | |
2103 | test_and_set_bit(FLG_PTP, &l2->flag); | |
2104 | if (test_bit(OPTION_L2_FIXEDTEI, &options)) | |
2105 | test_and_set_bit(FLG_FIXED_TEI, &l2->flag); | |
5b277b86 | 2106 | l2->tei = tei; |
1b2b03f8 KK |
2107 | l2->T200 = 1000; |
2108 | l2->N200 = 3; | |
2109 | l2->T203 = 10000; | |
2110 | if (test_bit(OPTION_L2_PMX, &options)) | |
2111 | rq.protocol = ISDN_P_NT_E1; | |
2112 | else | |
2113 | rq.protocol = ISDN_P_NT_S0; | |
2114 | rq.adr.channel = 0; | |
2115 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, OPEN_CHANNEL, &rq); | |
2116 | break; | |
2117 | case ISDN_P_LAPD_TE: | |
2118 | test_and_set_bit(FLG_LAPD, &l2->flag); | |
2119 | test_and_set_bit(FLG_MOD128, &l2->flag); | |
2120 | test_and_set_bit(FLG_ORIG, &l2->flag); | |
5b277b86 | 2121 | l2->sapi = sapi; |
1b2b03f8 KK |
2122 | l2->maxlen = MAX_DFRAME_LEN; |
2123 | if (test_bit(OPTION_L2_PMX, &options)) | |
2124 | l2->window = 7; | |
2125 | else | |
2126 | l2->window = 1; | |
2127 | if (test_bit(OPTION_L2_PTP, &options)) | |
2128 | test_and_set_bit(FLG_PTP, &l2->flag); | |
2129 | if (test_bit(OPTION_L2_FIXEDTEI, &options)) | |
2130 | test_and_set_bit(FLG_FIXED_TEI, &l2->flag); | |
5b277b86 | 2131 | l2->tei = tei; |
1b2b03f8 KK |
2132 | l2->T200 = 1000; |
2133 | l2->N200 = 3; | |
2134 | l2->T203 = 10000; | |
2135 | if (test_bit(OPTION_L2_PMX, &options)) | |
2136 | rq.protocol = ISDN_P_TE_E1; | |
2137 | else | |
2138 | rq.protocol = ISDN_P_TE_S0; | |
2139 | rq.adr.channel = 0; | |
2140 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, OPEN_CHANNEL, &rq); | |
2141 | break; | |
2142 | case ISDN_P_B_X75SLP: | |
2143 | test_and_set_bit(FLG_LAPB, &l2->flag); | |
2144 | l2->window = 7; | |
2145 | l2->maxlen = MAX_DATA_SIZE; | |
2146 | l2->T200 = 1000; | |
2147 | l2->N200 = 4; | |
2148 | l2->T203 = 5000; | |
2149 | l2->addr.A = 3; | |
2150 | l2->addr.B = 1; | |
2151 | break; | |
2152 | default: | |
2153 | printk(KERN_ERR "layer2 create failed prt %x\n", | |
2154 | protocol); | |
2155 | kfree(l2); | |
2156 | return NULL; | |
2157 | } | |
2158 | skb_queue_head_init(&l2->i_queue); | |
2159 | skb_queue_head_init(&l2->ui_queue); | |
2160 | skb_queue_head_init(&l2->down_queue); | |
2161 | skb_queue_head_init(&l2->tmp_queue); | |
2162 | InitWin(l2); | |
2163 | l2->l2m.fsm = &l2fsm; | |
2164 | if (test_bit(FLG_LAPB, &l2->flag) || | |
2165 | test_bit(FLG_PTP, &l2->flag) || | |
2166 | test_bit(FLG_LAPD_NET, &l2->flag)) | |
2167 | l2->l2m.state = ST_L2_4; | |
2168 | else | |
2169 | l2->l2m.state = ST_L2_1; | |
2170 | l2->l2m.debug = *debug; | |
2171 | l2->l2m.userdata = l2; | |
2172 | l2->l2m.userint = 0; | |
2173 | l2->l2m.printdebug = l2m_debug; | |
2174 | ||
2175 | mISDN_FsmInitTimer(&l2->l2m, &l2->t200); | |
2176 | mISDN_FsmInitTimer(&l2->l2m, &l2->t203); | |
2177 | return l2; | |
2178 | } | |
2179 | ||
2180 | static int | |
2181 | x75create(struct channel_req *crq) | |
2182 | { | |
2183 | struct layer2 *l2; | |
2184 | ||
2185 | if (crq->protocol != ISDN_P_B_X75SLP) | |
2186 | return -EPROTONOSUPPORT; | |
5b277b86 | 2187 | l2 = create_l2(crq->ch, crq->protocol, 0, 0, 0); |
1b2b03f8 KK |
2188 | if (!l2) |
2189 | return -ENOMEM; | |
2190 | crq->ch = &l2->ch; | |
2191 | crq->protocol = ISDN_P_B_HDLC; | |
2192 | return 0; | |
2193 | } | |
2194 | ||
2195 | static struct Bprotocol X75SLP = { | |
2196 | .Bprotocols = (1 << (ISDN_P_B_X75SLP & ISDN_P_B_MASK)), | |
2197 | .name = "X75SLP", | |
2198 | .create = x75create | |
2199 | }; | |
2200 | ||
2201 | int | |
2202 | Isdnl2_Init(u_int *deb) | |
2203 | { | |
2204 | debug = deb; | |
2205 | mISDN_register_Bprotocol(&X75SLP); | |
2206 | l2fsm.state_count = L2_STATE_COUNT; | |
2207 | l2fsm.event_count = L2_EVENT_COUNT; | |
2208 | l2fsm.strEvent = strL2Event; | |
2209 | l2fsm.strState = strL2State; | |
2210 | mISDN_FsmNew(&l2fsm, L2FnList, ARRAY_SIZE(L2FnList)); | |
2211 | TEIInit(deb); | |
2212 | return 0; | |
2213 | } | |
2214 | ||
2215 | void | |
2216 | Isdnl2_cleanup(void) | |
2217 | { | |
2218 | mISDN_unregister_Bprotocol(&X75SLP); | |
2219 | TEIFree(); | |
2220 | mISDN_FsmFree(&l2fsm); | |
2221 | } | |
2222 |