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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, | |
8423e6b2 KK |
61 | EV_L2_T200I, |
62 | EV_L2_T203I, | |
1b2b03f8 KK |
63 | EV_L2_SET_OWN_BUSY, |
64 | EV_L2_CLEAR_OWN_BUSY, | |
65 | EV_L2_FRAME_ERROR, | |
66 | }; | |
67 | ||
475be4d8 | 68 | #define L2_EVENT_COUNT (EV_L2_FRAME_ERROR + 1) |
1b2b03f8 KK |
69 | |
70 | static char *strL2Event[] = | |
71 | { | |
72 | "EV_L2_UI", | |
73 | "EV_L2_SABME", | |
74 | "EV_L2_DISC", | |
75 | "EV_L2_DM", | |
76 | "EV_L2_UA", | |
77 | "EV_L2_FRMR", | |
78 | "EV_L2_SUPER", | |
79 | "EV_L2_I", | |
80 | "EV_L2_DL_DATA", | |
81 | "EV_L2_ACK_PULL", | |
82 | "EV_L2_DL_UNITDATA", | |
83 | "EV_L2_DL_ESTABLISH_REQ", | |
84 | "EV_L2_DL_RELEASE_REQ", | |
85 | "EV_L2_MDL_ASSIGN", | |
86 | "EV_L2_MDL_REMOVE", | |
87 | "EV_L2_MDL_ERROR", | |
88 | "EV_L1_DEACTIVATE", | |
89 | "EV_L2_T200", | |
90 | "EV_L2_T203", | |
8423e6b2 KK |
91 | "EV_L2_T200I", |
92 | "EV_L2_T203I", | |
1b2b03f8 KK |
93 | "EV_L2_SET_OWN_BUSY", |
94 | "EV_L2_CLEAR_OWN_BUSY", | |
95 | "EV_L2_FRAME_ERROR", | |
96 | }; | |
97 | ||
98 | static void | |
99 | l2m_debug(struct FsmInst *fi, char *fmt, ...) | |
100 | { | |
101 | struct layer2 *l2 = fi->userdata; | |
020f01eb | 102 | struct va_format vaf; |
1b2b03f8 KK |
103 | va_list va; |
104 | ||
105 | if (!(*debug & DEBUG_L2_FSM)) | |
106 | return; | |
020f01eb | 107 | |
1b2b03f8 | 108 | va_start(va, fmt); |
020f01eb JP |
109 | |
110 | vaf.fmt = fmt; | |
111 | vaf.va = &va; | |
112 | ||
f45ebf3a KK |
113 | printk(KERN_DEBUG "%s l2 (sapi %d tei %d): %pV\n", |
114 | mISDNDevName4ch(&l2->ch), l2->sapi, l2->tei, &vaf); | |
020f01eb | 115 | |
1b2b03f8 KK |
116 | va_end(va); |
117 | } | |
118 | ||
119 | inline u_int | |
120 | l2headersize(struct layer2 *l2, int ui) | |
121 | { | |
122 | return ((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) + | |
123 | (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1); | |
124 | } | |
125 | ||
126 | inline u_int | |
127 | l2addrsize(struct layer2 *l2) | |
128 | { | |
129 | return test_bit(FLG_LAPD, &l2->flag) ? 2 : 1; | |
130 | } | |
131 | ||
132 | static u_int | |
133 | l2_newid(struct layer2 *l2) | |
134 | { | |
135 | u_int id; | |
136 | ||
137 | id = l2->next_id++; | |
138 | if (id == 0x7fff) | |
139 | l2->next_id = 1; | |
140 | id <<= 16; | |
141 | id |= l2->tei << 8; | |
142 | id |= l2->sapi; | |
143 | return id; | |
144 | } | |
145 | ||
146 | static void | |
147 | l2up(struct layer2 *l2, u_int prim, struct sk_buff *skb) | |
148 | { | |
149 | int err; | |
150 | ||
151 | if (!l2->up) | |
152 | return; | |
153 | mISDN_HEAD_PRIM(skb) = prim; | |
154 | mISDN_HEAD_ID(skb) = (l2->ch.nr << 16) | l2->ch.addr; | |
155 | err = l2->up->send(l2->up, skb); | |
156 | if (err) { | |
f45ebf3a KK |
157 | printk(KERN_WARNING "%s: dev %s err=%d\n", __func__, |
158 | mISDNDevName4ch(&l2->ch), err); | |
1b2b03f8 KK |
159 | dev_kfree_skb(skb); |
160 | } | |
161 | } | |
162 | ||
163 | static void | |
164 | l2up_create(struct layer2 *l2, u_int prim, int len, void *arg) | |
165 | { | |
166 | struct sk_buff *skb; | |
167 | struct mISDNhead *hh; | |
168 | int err; | |
169 | ||
170 | if (!l2->up) | |
171 | return; | |
172 | skb = mI_alloc_skb(len, GFP_ATOMIC); | |
173 | if (!skb) | |
174 | return; | |
175 | hh = mISDN_HEAD_P(skb); | |
176 | hh->prim = prim; | |
177 | hh->id = (l2->ch.nr << 16) | l2->ch.addr; | |
178 | if (len) | |
59ae1d12 | 179 | skb_put_data(skb, arg, len); |
1b2b03f8 KK |
180 | err = l2->up->send(l2->up, skb); |
181 | if (err) { | |
f45ebf3a KK |
182 | printk(KERN_WARNING "%s: dev %s err=%d\n", __func__, |
183 | mISDNDevName4ch(&l2->ch), err); | |
1b2b03f8 KK |
184 | dev_kfree_skb(skb); |
185 | } | |
186 | } | |
187 | ||
188 | static int | |
189 | l2down_skb(struct layer2 *l2, struct sk_buff *skb) { | |
190 | int ret; | |
191 | ||
192 | ret = l2->ch.recv(l2->ch.peer, skb); | |
193 | if (ret && (*debug & DEBUG_L2_RECV)) | |
f45ebf3a KK |
194 | printk(KERN_DEBUG "l2down_skb: dev %s ret(%d)\n", |
195 | mISDNDevName4ch(&l2->ch), ret); | |
1b2b03f8 KK |
196 | return ret; |
197 | } | |
198 | ||
199 | static int | |
200 | l2down_raw(struct layer2 *l2, struct sk_buff *skb) | |
201 | { | |
202 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
203 | ||
204 | if (hh->prim == PH_DATA_REQ) { | |
205 | if (test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) { | |
206 | skb_queue_tail(&l2->down_queue, skb); | |
207 | return 0; | |
208 | } | |
209 | l2->down_id = mISDN_HEAD_ID(skb); | |
210 | } | |
211 | return l2down_skb(l2, skb); | |
212 | } | |
213 | ||
214 | static int | |
215 | l2down(struct layer2 *l2, u_int prim, u_int id, struct sk_buff *skb) | |
216 | { | |
217 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
218 | ||
219 | hh->prim = prim; | |
220 | hh->id = id; | |
221 | return l2down_raw(l2, skb); | |
222 | } | |
223 | ||
224 | static int | |
225 | l2down_create(struct layer2 *l2, u_int prim, u_int id, int len, void *arg) | |
226 | { | |
227 | struct sk_buff *skb; | |
228 | int err; | |
229 | struct mISDNhead *hh; | |
230 | ||
231 | skb = mI_alloc_skb(len, GFP_ATOMIC); | |
232 | if (!skb) | |
233 | return -ENOMEM; | |
234 | hh = mISDN_HEAD_P(skb); | |
235 | hh->prim = prim; | |
236 | hh->id = id; | |
237 | if (len) | |
59ae1d12 | 238 | skb_put_data(skb, arg, len); |
1b2b03f8 KK |
239 | err = l2down_raw(l2, skb); |
240 | if (err) | |
241 | dev_kfree_skb(skb); | |
242 | return err; | |
243 | } | |
244 | ||
245 | static int | |
246 | ph_data_confirm(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb) { | |
247 | struct sk_buff *nskb = skb; | |
248 | int ret = -EAGAIN; | |
249 | ||
250 | if (test_bit(FLG_L1_NOTREADY, &l2->flag)) { | |
251 | if (hh->id == l2->down_id) { | |
252 | nskb = skb_dequeue(&l2->down_queue); | |
253 | if (nskb) { | |
254 | l2->down_id = mISDN_HEAD_ID(nskb); | |
255 | if (l2down_skb(l2, nskb)) { | |
256 | dev_kfree_skb(nskb); | |
257 | l2->down_id = MISDN_ID_NONE; | |
258 | } | |
259 | } else | |
260 | l2->down_id = MISDN_ID_NONE; | |
261 | if (ret) { | |
262 | dev_kfree_skb(skb); | |
263 | ret = 0; | |
264 | } | |
265 | if (l2->down_id == MISDN_ID_NONE) { | |
266 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); | |
267 | mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL); | |
268 | } | |
269 | } | |
270 | } | |
271 | if (!test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) { | |
272 | nskb = skb_dequeue(&l2->down_queue); | |
273 | if (nskb) { | |
274 | l2->down_id = mISDN_HEAD_ID(nskb); | |
275 | if (l2down_skb(l2, nskb)) { | |
276 | dev_kfree_skb(nskb); | |
277 | l2->down_id = MISDN_ID_NONE; | |
278 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); | |
279 | } | |
280 | } else | |
281 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); | |
282 | } | |
283 | return ret; | |
284 | } | |
285 | ||
8423e6b2 KK |
286 | static void |
287 | l2_timeout(struct FsmInst *fi, int event, void *arg) | |
288 | { | |
289 | struct layer2 *l2 = fi->userdata; | |
290 | struct sk_buff *skb; | |
291 | struct mISDNhead *hh; | |
292 | ||
293 | skb = mI_alloc_skb(0, GFP_ATOMIC); | |
294 | if (!skb) { | |
f45ebf3a KK |
295 | printk(KERN_WARNING "%s: L2(%d,%d) nr:%x timer %s no skb\n", |
296 | mISDNDevName4ch(&l2->ch), l2->sapi, l2->tei, | |
297 | l2->ch.nr, event == EV_L2_T200 ? "T200" : "T203"); | |
8423e6b2 KK |
298 | return; |
299 | } | |
300 | hh = mISDN_HEAD_P(skb); | |
301 | hh->prim = event == EV_L2_T200 ? DL_TIMER200_IND : DL_TIMER203_IND; | |
302 | hh->id = l2->ch.nr; | |
303 | if (*debug & DEBUG_TIMER) | |
f45ebf3a KK |
304 | printk(KERN_DEBUG "%s: L2(%d,%d) nr:%x timer %s expired\n", |
305 | mISDNDevName4ch(&l2->ch), l2->sapi, l2->tei, | |
306 | l2->ch.nr, event == EV_L2_T200 ? "T200" : "T203"); | |
8423e6b2 KK |
307 | if (l2->ch.st) |
308 | l2->ch.st->own.recv(&l2->ch.st->own, skb); | |
309 | } | |
310 | ||
1b2b03f8 KK |
311 | static int |
312 | l2mgr(struct layer2 *l2, u_int prim, void *arg) { | |
313 | long c = (long)arg; | |
314 | ||
f45ebf3a KK |
315 | printk(KERN_WARNING "l2mgr: dev %s addr:%x prim %x %c\n", |
316 | mISDNDevName4ch(&l2->ch), l2->id, prim, (char)c); | |
1b2b03f8 | 317 | if (test_bit(FLG_LAPD, &l2->flag) && |
475be4d8 | 318 | !test_bit(FLG_FIXED_TEI, &l2->flag)) { |
1b2b03f8 KK |
319 | switch (c) { |
320 | case 'C': | |
321 | case 'D': | |
322 | case 'G': | |
323 | case 'H': | |
324 | l2_tei(l2, prim, (u_long)arg); | |
325 | break; | |
326 | } | |
327 | } | |
328 | return 0; | |
329 | } | |
330 | ||
331 | static void | |
332 | set_peer_busy(struct layer2 *l2) { | |
333 | test_and_set_bit(FLG_PEER_BUSY, &l2->flag); | |
334 | if (skb_queue_len(&l2->i_queue) || skb_queue_len(&l2->ui_queue)) | |
335 | test_and_set_bit(FLG_L2BLOCK, &l2->flag); | |
336 | } | |
337 | ||
338 | static void | |
339 | clear_peer_busy(struct layer2 *l2) { | |
340 | if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag)) | |
341 | test_and_clear_bit(FLG_L2BLOCK, &l2->flag); | |
342 | } | |
343 | ||
344 | static void | |
345 | InitWin(struct layer2 *l2) | |
346 | { | |
347 | int i; | |
348 | ||
349 | for (i = 0; i < MAX_WINDOW; i++) | |
350 | l2->windowar[i] = NULL; | |
351 | } | |
352 | ||
353 | static int | |
354 | freewin(struct layer2 *l2) | |
355 | { | |
356 | int i, cnt = 0; | |
357 | ||
358 | for (i = 0; i < MAX_WINDOW; i++) { | |
359 | if (l2->windowar[i]) { | |
360 | cnt++; | |
361 | dev_kfree_skb(l2->windowar[i]); | |
362 | l2->windowar[i] = NULL; | |
363 | } | |
364 | } | |
365 | return cnt; | |
366 | } | |
367 | ||
368 | static void | |
369 | ReleaseWin(struct layer2 *l2) | |
370 | { | |
371 | int cnt = freewin(l2); | |
372 | ||
373 | if (cnt) | |
374 | printk(KERN_WARNING | |
475be4d8 | 375 | "isdnl2 freed %d skbuffs in release\n", cnt); |
1b2b03f8 KK |
376 | } |
377 | ||
378 | inline unsigned int | |
379 | cansend(struct layer2 *l2) | |
380 | { | |
381 | unsigned int p1; | |
382 | ||
383 | if (test_bit(FLG_MOD128, &l2->flag)) | |
384 | p1 = (l2->vs - l2->va) % 128; | |
385 | else | |
386 | p1 = (l2->vs - l2->va) % 8; | |
387 | return (p1 < l2->window) && !test_bit(FLG_PEER_BUSY, &l2->flag); | |
388 | } | |
389 | ||
390 | inline void | |
391 | clear_exception(struct layer2 *l2) | |
392 | { | |
393 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
394 | test_and_clear_bit(FLG_REJEXC, &l2->flag); | |
395 | test_and_clear_bit(FLG_OWN_BUSY, &l2->flag); | |
396 | clear_peer_busy(l2); | |
397 | } | |
398 | ||
399 | static int | |
400 | sethdraddr(struct layer2 *l2, u_char *header, int rsp) | |
401 | { | |
402 | u_char *ptr = header; | |
403 | int crbit = rsp; | |
404 | ||
405 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
406 | if (test_bit(FLG_LAPD_NET, &l2->flag)) | |
407 | crbit = !crbit; | |
408 | *ptr++ = (l2->sapi << 2) | (crbit ? 2 : 0); | |
409 | *ptr++ = (l2->tei << 1) | 1; | |
410 | return 2; | |
411 | } else { | |
412 | if (test_bit(FLG_ORIG, &l2->flag)) | |
413 | crbit = !crbit; | |
414 | if (crbit) | |
415 | *ptr++ = l2->addr.B; | |
416 | else | |
417 | *ptr++ = l2->addr.A; | |
418 | return 1; | |
419 | } | |
420 | } | |
421 | ||
422 | static inline void | |
423 | enqueue_super(struct layer2 *l2, struct sk_buff *skb) | |
424 | { | |
425 | if (l2down(l2, PH_DATA_REQ, l2_newid(l2), skb)) | |
426 | dev_kfree_skb(skb); | |
427 | } | |
428 | ||
429 | static inline void | |
430 | enqueue_ui(struct layer2 *l2, struct sk_buff *skb) | |
431 | { | |
432 | if (l2->tm) | |
433 | l2_tei(l2, MDL_STATUS_UI_IND, 0); | |
434 | if (l2down(l2, PH_DATA_REQ, l2_newid(l2), skb)) | |
435 | dev_kfree_skb(skb); | |
436 | } | |
437 | ||
438 | inline int | |
439 | IsUI(u_char *data) | |
440 | { | |
441 | return (data[0] & 0xef) == UI; | |
442 | } | |
443 | ||
444 | inline int | |
445 | IsUA(u_char *data) | |
446 | { | |
447 | return (data[0] & 0xef) == UA; | |
448 | } | |
449 | ||
450 | inline int | |
451 | IsDM(u_char *data) | |
452 | { | |
453 | return (data[0] & 0xef) == DM; | |
454 | } | |
455 | ||
456 | inline int | |
457 | IsDISC(u_char *data) | |
458 | { | |
459 | return (data[0] & 0xef) == DISC; | |
460 | } | |
461 | ||
462 | inline int | |
463 | IsRR(u_char *data, struct layer2 *l2) | |
464 | { | |
465 | if (test_bit(FLG_MOD128, &l2->flag)) | |
466 | return data[0] == RR; | |
467 | else | |
468 | return (data[0] & 0xf) == 1; | |
469 | } | |
470 | ||
471 | inline int | |
472 | IsSFrame(u_char *data, struct layer2 *l2) | |
473 | { | |
474 | register u_char d = *data; | |
475 | ||
476 | if (!test_bit(FLG_MOD128, &l2->flag)) | |
477 | d &= 0xf; | |
478 | return ((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c); | |
479 | } | |
480 | ||
481 | inline int | |
482 | IsSABME(u_char *data, struct layer2 *l2) | |
483 | { | |
484 | u_char d = data[0] & ~0x10; | |
485 | ||
486 | return test_bit(FLG_MOD128, &l2->flag) ? d == SABME : d == SABM; | |
487 | } | |
488 | ||
489 | inline int | |
490 | IsREJ(u_char *data, struct layer2 *l2) | |
491 | { | |
492 | return test_bit(FLG_MOD128, &l2->flag) ? | |
493 | data[0] == REJ : (data[0] & 0xf) == REJ; | |
494 | } | |
495 | ||
496 | inline int | |
497 | IsFRMR(u_char *data) | |
498 | { | |
499 | return (data[0] & 0xef) == FRMR; | |
500 | } | |
501 | ||
502 | inline int | |
503 | IsRNR(u_char *data, struct layer2 *l2) | |
504 | { | |
505 | return test_bit(FLG_MOD128, &l2->flag) ? | |
475be4d8 | 506 | data[0] == RNR : (data[0] & 0xf) == RNR; |
1b2b03f8 KK |
507 | } |
508 | ||
5b834354 | 509 | static int |
1b2b03f8 KK |
510 | iframe_error(struct layer2 *l2, struct sk_buff *skb) |
511 | { | |
512 | u_int i; | |
513 | int rsp = *skb->data & 0x2; | |
514 | ||
515 | i = l2addrsize(l2) + (test_bit(FLG_MOD128, &l2->flag) ? 2 : 1); | |
516 | if (test_bit(FLG_ORIG, &l2->flag)) | |
517 | rsp = !rsp; | |
518 | if (rsp) | |
519 | return 'L'; | |
520 | if (skb->len < i) | |
521 | return 'N'; | |
522 | if ((skb->len - i) > l2->maxlen) | |
523 | return 'O'; | |
524 | return 0; | |
525 | } | |
526 | ||
5b834354 | 527 | static int |
1b2b03f8 KK |
528 | super_error(struct layer2 *l2, struct sk_buff *skb) |
529 | { | |
530 | if (skb->len != l2addrsize(l2) + | |
531 | (test_bit(FLG_MOD128, &l2->flag) ? 2 : 1)) | |
532 | return 'N'; | |
533 | return 0; | |
534 | } | |
535 | ||
5b834354 | 536 | static int |
1b2b03f8 KK |
537 | unnum_error(struct layer2 *l2, struct sk_buff *skb, int wantrsp) |
538 | { | |
539 | int rsp = (*skb->data & 0x2) >> 1; | |
540 | if (test_bit(FLG_ORIG, &l2->flag)) | |
541 | rsp = !rsp; | |
542 | if (rsp != wantrsp) | |
543 | return 'L'; | |
544 | if (skb->len != l2addrsize(l2) + 1) | |
545 | return 'N'; | |
546 | return 0; | |
547 | } | |
548 | ||
5b834354 | 549 | static int |
1b2b03f8 KK |
550 | UI_error(struct layer2 *l2, struct sk_buff *skb) |
551 | { | |
552 | int rsp = *skb->data & 0x2; | |
553 | if (test_bit(FLG_ORIG, &l2->flag)) | |
554 | rsp = !rsp; | |
555 | if (rsp) | |
556 | return 'L'; | |
557 | if (skb->len > l2->maxlen + l2addrsize(l2) + 1) | |
558 | return 'O'; | |
559 | return 0; | |
560 | } | |
561 | ||
5b834354 | 562 | static int |
1b2b03f8 KK |
563 | FRMR_error(struct layer2 *l2, struct sk_buff *skb) |
564 | { | |
565 | u_int headers = l2addrsize(l2) + 1; | |
566 | u_char *datap = skb->data + headers; | |
567 | int rsp = *skb->data & 0x2; | |
568 | ||
569 | if (test_bit(FLG_ORIG, &l2->flag)) | |
570 | rsp = !rsp; | |
571 | if (!rsp) | |
572 | return 'L'; | |
573 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
574 | if (skb->len < headers + 5) | |
575 | return 'N'; | |
576 | else if (*debug & DEBUG_L2) | |
577 | l2m_debug(&l2->l2m, | |
475be4d8 JP |
578 | "FRMR information %2x %2x %2x %2x %2x", |
579 | datap[0], datap[1], datap[2], datap[3], datap[4]); | |
1b2b03f8 KK |
580 | } else { |
581 | if (skb->len < headers + 3) | |
582 | return 'N'; | |
583 | else if (*debug & DEBUG_L2) | |
584 | l2m_debug(&l2->l2m, | |
475be4d8 JP |
585 | "FRMR information %2x %2x %2x", |
586 | datap[0], datap[1], datap[2]); | |
1b2b03f8 KK |
587 | } |
588 | return 0; | |
589 | } | |
590 | ||
591 | static unsigned int | |
592 | legalnr(struct layer2 *l2, unsigned int nr) | |
593 | { | |
594 | if (test_bit(FLG_MOD128, &l2->flag)) | |
595 | return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128); | |
596 | else | |
597 | return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8); | |
598 | } | |
599 | ||
600 | static void | |
601 | setva(struct layer2 *l2, unsigned int nr) | |
602 | { | |
603 | struct sk_buff *skb; | |
604 | ||
605 | while (l2->va != nr) { | |
606 | l2->va++; | |
607 | if (test_bit(FLG_MOD128, &l2->flag)) | |
608 | l2->va %= 128; | |
609 | else | |
610 | l2->va %= 8; | |
611 | if (l2->windowar[l2->sow]) { | |
612 | skb_trim(l2->windowar[l2->sow], 0); | |
613 | skb_queue_tail(&l2->tmp_queue, l2->windowar[l2->sow]); | |
614 | l2->windowar[l2->sow] = NULL; | |
615 | } | |
616 | l2->sow = (l2->sow + 1) % l2->window; | |
617 | } | |
618 | skb = skb_dequeue(&l2->tmp_queue); | |
619 | while (skb) { | |
620 | dev_kfree_skb(skb); | |
621 | skb = skb_dequeue(&l2->tmp_queue); | |
622 | } | |
623 | } | |
624 | ||
625 | static void | |
626 | send_uframe(struct layer2 *l2, struct sk_buff *skb, u_char cmd, u_char cr) | |
627 | { | |
628 | u_char tmp[MAX_L2HEADER_LEN]; | |
629 | int i; | |
630 | ||
631 | i = sethdraddr(l2, tmp, cr); | |
632 | tmp[i++] = cmd; | |
633 | if (skb) | |
634 | skb_trim(skb, 0); | |
635 | else { | |
636 | skb = mI_alloc_skb(i, GFP_ATOMIC); | |
637 | if (!skb) { | |
f45ebf3a KK |
638 | printk(KERN_WARNING "%s: can't alloc skbuff in %s\n", |
639 | mISDNDevName4ch(&l2->ch), __func__); | |
1b2b03f8 KK |
640 | return; |
641 | } | |
642 | } | |
59ae1d12 | 643 | skb_put_data(skb, tmp, i); |
1b2b03f8 KK |
644 | enqueue_super(l2, skb); |
645 | } | |
646 | ||
647 | ||
648 | inline u_char | |
649 | get_PollFlag(struct layer2 *l2, struct sk_buff *skb) | |
650 | { | |
651 | return skb->data[l2addrsize(l2)] & 0x10; | |
652 | } | |
653 | ||
654 | inline u_char | |
655 | get_PollFlagFree(struct layer2 *l2, struct sk_buff *skb) | |
656 | { | |
657 | u_char PF; | |
658 | ||
659 | PF = get_PollFlag(l2, skb); | |
660 | dev_kfree_skb(skb); | |
661 | return PF; | |
662 | } | |
663 | ||
664 | inline void | |
665 | start_t200(struct layer2 *l2, int i) | |
666 | { | |
667 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, i); | |
668 | test_and_set_bit(FLG_T200_RUN, &l2->flag); | |
669 | } | |
670 | ||
671 | inline void | |
672 | restart_t200(struct layer2 *l2, int i) | |
673 | { | |
674 | mISDN_FsmRestartTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, i); | |
675 | test_and_set_bit(FLG_T200_RUN, &l2->flag); | |
676 | } | |
677 | ||
678 | inline void | |
679 | stop_t200(struct layer2 *l2, int i) | |
680 | { | |
681 | if (test_and_clear_bit(FLG_T200_RUN, &l2->flag)) | |
682 | mISDN_FsmDelTimer(&l2->t200, i); | |
683 | } | |
684 | ||
685 | inline void | |
686 | st5_dl_release_l2l3(struct layer2 *l2) | |
687 | { | |
688 | int pr; | |
689 | ||
690 | if (test_and_clear_bit(FLG_PEND_REL, &l2->flag)) | |
691 | pr = DL_RELEASE_CNF; | |
692 | else | |
693 | pr = DL_RELEASE_IND; | |
694 | l2up_create(l2, pr, 0, NULL); | |
695 | } | |
696 | ||
697 | inline void | |
698 | lapb_dl_release_l2l3(struct layer2 *l2, int f) | |
699 | { | |
700 | if (test_bit(FLG_LAPB, &l2->flag)) | |
701 | l2down_create(l2, PH_DEACTIVATE_REQ, l2_newid(l2), 0, NULL); | |
702 | l2up_create(l2, f, 0, NULL); | |
703 | } | |
704 | ||
705 | static void | |
706 | establishlink(struct FsmInst *fi) | |
707 | { | |
708 | struct layer2 *l2 = fi->userdata; | |
709 | u_char cmd; | |
710 | ||
711 | clear_exception(l2); | |
712 | l2->rc = 0; | |
713 | cmd = (test_bit(FLG_MOD128, &l2->flag) ? SABME : SABM) | 0x10; | |
714 | send_uframe(l2, NULL, cmd, CMD); | |
715 | mISDN_FsmDelTimer(&l2->t203, 1); | |
716 | restart_t200(l2, 1); | |
717 | test_and_clear_bit(FLG_PEND_REL, &l2->flag); | |
718 | freewin(l2); | |
719 | mISDN_FsmChangeState(fi, ST_L2_5); | |
720 | } | |
721 | ||
722 | static void | |
723 | l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg) | |
724 | { | |
725 | struct sk_buff *skb = arg; | |
726 | struct layer2 *l2 = fi->userdata; | |
727 | ||
728 | if (get_PollFlagFree(l2, skb)) | |
729 | l2mgr(l2, MDL_ERROR_IND, (void *) 'C'); | |
730 | else | |
731 | l2mgr(l2, MDL_ERROR_IND, (void *) 'D'); | |
732 | ||
733 | } | |
734 | ||
735 | static void | |
736 | l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg) | |
737 | { | |
738 | struct sk_buff *skb = arg; | |
739 | struct layer2 *l2 = fi->userdata; | |
740 | ||
741 | if (get_PollFlagFree(l2, skb)) | |
742 | l2mgr(l2, MDL_ERROR_IND, (void *) 'B'); | |
743 | else { | |
744 | l2mgr(l2, MDL_ERROR_IND, (void *) 'E'); | |
745 | establishlink(fi); | |
746 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
747 | } | |
748 | } | |
749 | ||
750 | static void | |
751 | l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg) | |
752 | { | |
753 | struct sk_buff *skb = arg; | |
754 | struct layer2 *l2 = fi->userdata; | |
755 | ||
756 | if (get_PollFlagFree(l2, skb)) | |
757 | l2mgr(l2, MDL_ERROR_IND, (void *) 'B'); | |
758 | else | |
759 | l2mgr(l2, MDL_ERROR_IND, (void *) 'E'); | |
760 | establishlink(fi); | |
761 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
762 | } | |
763 | ||
764 | static void | |
765 | l2_go_st3(struct FsmInst *fi, int event, void *arg) | |
766 | { | |
767 | dev_kfree_skb((struct sk_buff *)arg); | |
768 | mISDN_FsmChangeState(fi, ST_L2_3); | |
769 | } | |
770 | ||
771 | static void | |
772 | l2_mdl_assign(struct FsmInst *fi, int event, void *arg) | |
773 | { | |
774 | struct layer2 *l2 = fi->userdata; | |
775 | ||
776 | mISDN_FsmChangeState(fi, ST_L2_3); | |
777 | dev_kfree_skb((struct sk_buff *)arg); | |
778 | l2_tei(l2, MDL_ASSIGN_IND, 0); | |
779 | } | |
780 | ||
781 | static void | |
782 | l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg) | |
783 | { | |
784 | struct layer2 *l2 = fi->userdata; | |
785 | struct sk_buff *skb = arg; | |
786 | ||
787 | skb_queue_tail(&l2->ui_queue, skb); | |
788 | mISDN_FsmChangeState(fi, ST_L2_2); | |
789 | l2_tei(l2, MDL_ASSIGN_IND, 0); | |
790 | } | |
791 | ||
792 | static void | |
793 | l2_queue_ui(struct FsmInst *fi, int event, void *arg) | |
794 | { | |
795 | struct layer2 *l2 = fi->userdata; | |
796 | struct sk_buff *skb = arg; | |
797 | ||
798 | skb_queue_tail(&l2->ui_queue, skb); | |
799 | } | |
800 | ||
801 | static void | |
802 | tx_ui(struct layer2 *l2) | |
803 | { | |
804 | struct sk_buff *skb; | |
805 | u_char header[MAX_L2HEADER_LEN]; | |
806 | int i; | |
807 | ||
808 | i = sethdraddr(l2, header, CMD); | |
809 | if (test_bit(FLG_LAPD_NET, &l2->flag)) | |
810 | header[1] = 0xff; /* tei 127 */ | |
811 | header[i++] = UI; | |
812 | while ((skb = skb_dequeue(&l2->ui_queue))) { | |
813 | memcpy(skb_push(skb, i), header, i); | |
814 | enqueue_ui(l2, skb); | |
815 | } | |
816 | } | |
817 | ||
818 | static void | |
819 | l2_send_ui(struct FsmInst *fi, int event, void *arg) | |
820 | { | |
821 | struct layer2 *l2 = fi->userdata; | |
822 | struct sk_buff *skb = arg; | |
823 | ||
824 | skb_queue_tail(&l2->ui_queue, skb); | |
825 | tx_ui(l2); | |
826 | } | |
827 | ||
828 | static void | |
829 | l2_got_ui(struct FsmInst *fi, int event, void *arg) | |
830 | { | |
831 | struct layer2 *l2 = fi->userdata; | |
832 | struct sk_buff *skb = arg; | |
833 | ||
834 | skb_pull(skb, l2headersize(l2, 1)); | |
835 | /* | |
836 | * in states 1-3 for broadcast | |
837 | */ | |
838 | ||
839 | if (l2->tm) | |
840 | l2_tei(l2, MDL_STATUS_UI_IND, 0); | |
841 | l2up(l2, DL_UNITDATA_IND, skb); | |
842 | } | |
843 | ||
844 | static void | |
845 | l2_establish(struct FsmInst *fi, int event, void *arg) | |
846 | { | |
847 | struct sk_buff *skb = arg; | |
848 | struct layer2 *l2 = fi->userdata; | |
849 | ||
850 | establishlink(fi); | |
851 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
852 | dev_kfree_skb(skb); | |
853 | } | |
854 | ||
855 | static void | |
856 | l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg) | |
857 | { | |
858 | struct sk_buff *skb = arg; | |
859 | struct layer2 *l2 = fi->userdata; | |
860 | ||
861 | skb_queue_purge(&l2->i_queue); | |
862 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
863 | test_and_clear_bit(FLG_PEND_REL, &l2->flag); | |
864 | dev_kfree_skb(skb); | |
865 | } | |
866 | ||
867 | static void | |
868 | l2_l3_reestablish(struct FsmInst *fi, int event, void *arg) | |
869 | { | |
870 | struct sk_buff *skb = arg; | |
871 | struct layer2 *l2 = fi->userdata; | |
872 | ||
873 | skb_queue_purge(&l2->i_queue); | |
874 | establishlink(fi); | |
875 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
876 | dev_kfree_skb(skb); | |
877 | } | |
878 | ||
879 | static void | |
880 | l2_release(struct FsmInst *fi, int event, void *arg) | |
881 | { | |
882 | struct layer2 *l2 = fi->userdata; | |
883 | struct sk_buff *skb = arg; | |
884 | ||
885 | skb_trim(skb, 0); | |
886 | l2up(l2, DL_RELEASE_CNF, skb); | |
887 | } | |
888 | ||
889 | static void | |
890 | l2_pend_rel(struct FsmInst *fi, int event, void *arg) | |
891 | { | |
892 | struct sk_buff *skb = arg; | |
893 | struct layer2 *l2 = fi->userdata; | |
894 | ||
895 | test_and_set_bit(FLG_PEND_REL, &l2->flag); | |
896 | dev_kfree_skb(skb); | |
897 | } | |
898 | ||
899 | static void | |
900 | l2_disconnect(struct FsmInst *fi, int event, void *arg) | |
901 | { | |
902 | struct layer2 *l2 = fi->userdata; | |
903 | struct sk_buff *skb = arg; | |
904 | ||
905 | skb_queue_purge(&l2->i_queue); | |
906 | freewin(l2); | |
907 | mISDN_FsmChangeState(fi, ST_L2_6); | |
908 | l2->rc = 0; | |
909 | send_uframe(l2, NULL, DISC | 0x10, CMD); | |
910 | mISDN_FsmDelTimer(&l2->t203, 1); | |
911 | restart_t200(l2, 2); | |
912 | if (skb) | |
913 | dev_kfree_skb(skb); | |
914 | } | |
915 | ||
916 | static void | |
917 | l2_start_multi(struct FsmInst *fi, int event, void *arg) | |
918 | { | |
919 | struct layer2 *l2 = fi->userdata; | |
920 | struct sk_buff *skb = arg; | |
921 | ||
922 | l2->vs = 0; | |
923 | l2->va = 0; | |
924 | l2->vr = 0; | |
925 | l2->sow = 0; | |
926 | clear_exception(l2); | |
927 | send_uframe(l2, NULL, UA | get_PollFlag(l2, skb), RSP); | |
928 | mISDN_FsmChangeState(fi, ST_L2_7); | |
929 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 3); | |
930 | skb_trim(skb, 0); | |
931 | l2up(l2, DL_ESTABLISH_IND, skb); | |
932 | if (l2->tm) | |
933 | l2_tei(l2, MDL_STATUS_UP_IND, 0); | |
934 | } | |
935 | ||
936 | static void | |
937 | l2_send_UA(struct FsmInst *fi, int event, void *arg) | |
938 | { | |
939 | struct layer2 *l2 = fi->userdata; | |
940 | struct sk_buff *skb = arg; | |
941 | ||
942 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); | |
943 | } | |
944 | ||
945 | static void | |
946 | l2_send_DM(struct FsmInst *fi, int event, void *arg) | |
947 | { | |
948 | struct layer2 *l2 = fi->userdata; | |
949 | struct sk_buff *skb = arg; | |
950 | ||
951 | send_uframe(l2, skb, DM | get_PollFlag(l2, skb), RSP); | |
952 | } | |
953 | ||
954 | static void | |
955 | l2_restart_multi(struct FsmInst *fi, int event, void *arg) | |
956 | { | |
957 | struct layer2 *l2 = fi->userdata; | |
958 | struct sk_buff *skb = arg; | |
959 | int est = 0; | |
960 | ||
961 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); | |
962 | ||
963 | l2mgr(l2, MDL_ERROR_IND, (void *) 'F'); | |
964 | ||
965 | if (l2->vs != l2->va) { | |
966 | skb_queue_purge(&l2->i_queue); | |
967 | est = 1; | |
968 | } | |
969 | ||
970 | clear_exception(l2); | |
971 | l2->vs = 0; | |
972 | l2->va = 0; | |
973 | l2->vr = 0; | |
974 | l2->sow = 0; | |
975 | mISDN_FsmChangeState(fi, ST_L2_7); | |
976 | stop_t200(l2, 3); | |
977 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 3); | |
978 | ||
979 | if (est) | |
980 | l2up_create(l2, DL_ESTABLISH_IND, 0, NULL); | |
981 | /* mISDN_queue_data(&l2->inst, l2->inst.id | MSG_BROADCAST, | |
982 | * MGR_SHORTSTATUS | INDICATION, SSTATUS_L2_ESTABLISHED, | |
983 | * 0, NULL, 0); | |
984 | */ | |
985 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) | |
986 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
987 | } | |
988 | ||
989 | static void | |
990 | l2_stop_multi(struct FsmInst *fi, int event, void *arg) | |
991 | { | |
992 | struct layer2 *l2 = fi->userdata; | |
993 | struct sk_buff *skb = arg; | |
994 | ||
995 | mISDN_FsmChangeState(fi, ST_L2_4); | |
996 | mISDN_FsmDelTimer(&l2->t203, 3); | |
997 | stop_t200(l2, 4); | |
998 | ||
999 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); | |
1000 | skb_queue_purge(&l2->i_queue); | |
1001 | freewin(l2); | |
1002 | lapb_dl_release_l2l3(l2, DL_RELEASE_IND); | |
1003 | if (l2->tm) | |
1004 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1005 | } | |
1006 | ||
1007 | static void | |
1008 | l2_connected(struct FsmInst *fi, int event, void *arg) | |
1009 | { | |
1010 | struct layer2 *l2 = fi->userdata; | |
1011 | struct sk_buff *skb = arg; | |
1012 | int pr = -1; | |
1013 | ||
1014 | if (!get_PollFlag(l2, skb)) { | |
1015 | l2_mdl_error_ua(fi, event, arg); | |
1016 | return; | |
1017 | } | |
1018 | dev_kfree_skb(skb); | |
1019 | if (test_and_clear_bit(FLG_PEND_REL, &l2->flag)) | |
1020 | l2_disconnect(fi, event, NULL); | |
1021 | if (test_and_clear_bit(FLG_L3_INIT, &l2->flag)) { | |
1022 | pr = DL_ESTABLISH_CNF; | |
1023 | } else if (l2->vs != l2->va) { | |
1024 | skb_queue_purge(&l2->i_queue); | |
1025 | pr = DL_ESTABLISH_IND; | |
1026 | } | |
1027 | stop_t200(l2, 5); | |
1028 | l2->vr = 0; | |
1029 | l2->vs = 0; | |
1030 | l2->va = 0; | |
1031 | l2->sow = 0; | |
1032 | mISDN_FsmChangeState(fi, ST_L2_7); | |
1033 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 4); | |
1034 | if (pr != -1) | |
1035 | l2up_create(l2, pr, 0, NULL); | |
1036 | ||
1037 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) | |
1038 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1039 | ||
1040 | if (l2->tm) | |
1041 | l2_tei(l2, MDL_STATUS_UP_IND, 0); | |
1042 | } | |
1043 | ||
1044 | static void | |
1045 | l2_released(struct FsmInst *fi, int event, void *arg) | |
1046 | { | |
1047 | struct layer2 *l2 = fi->userdata; | |
1048 | struct sk_buff *skb = arg; | |
1049 | ||
1050 | if (!get_PollFlag(l2, skb)) { | |
1051 | l2_mdl_error_ua(fi, event, arg); | |
1052 | return; | |
1053 | } | |
1054 | dev_kfree_skb(skb); | |
1055 | stop_t200(l2, 6); | |
1056 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); | |
1057 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1058 | if (l2->tm) | |
1059 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1060 | } | |
1061 | ||
1062 | static void | |
1063 | l2_reestablish(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 | establishlink(fi); | |
1070 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | static void | |
1075 | l2_st5_dm_release(struct FsmInst *fi, int event, void *arg) | |
1076 | { | |
1077 | struct layer2 *l2 = fi->userdata; | |
1078 | struct sk_buff *skb = arg; | |
1079 | ||
1080 | if (get_PollFlagFree(l2, skb)) { | |
1081 | stop_t200(l2, 7); | |
1082 | if (!test_bit(FLG_L3_INIT, &l2->flag)) | |
1083 | skb_queue_purge(&l2->i_queue); | |
1084 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1085 | l2down_create(l2, PH_DEACTIVATE_REQ, | |
475be4d8 | 1086 | l2_newid(l2), 0, NULL); |
1b2b03f8 KK |
1087 | st5_dl_release_l2l3(l2); |
1088 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1089 | if (l2->tm) | |
1090 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | static void | |
1095 | l2_st6_dm_release(struct FsmInst *fi, int event, void *arg) | |
1096 | { | |
1097 | struct layer2 *l2 = fi->userdata; | |
1098 | struct sk_buff *skb = arg; | |
1099 | ||
1100 | if (get_PollFlagFree(l2, skb)) { | |
1101 | stop_t200(l2, 8); | |
1102 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); | |
1103 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1104 | if (l2->tm) | |
1105 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1106 | } | |
1107 | } | |
1108 | ||
5b834354 | 1109 | static void |
1b2b03f8 KK |
1110 | enquiry_cr(struct layer2 *l2, u_char typ, u_char cr, u_char pf) |
1111 | { | |
1112 | struct sk_buff *skb; | |
1113 | u_char tmp[MAX_L2HEADER_LEN]; | |
1114 | int i; | |
1115 | ||
1116 | i = sethdraddr(l2, tmp, cr); | |
1117 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1118 | tmp[i++] = typ; | |
1119 | tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0); | |
1120 | } else | |
1121 | tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0); | |
1122 | skb = mI_alloc_skb(i, GFP_ATOMIC); | |
1123 | if (!skb) { | |
f45ebf3a KK |
1124 | printk(KERN_WARNING "%s: isdnl2 can't alloc sbbuff in %s\n", |
1125 | mISDNDevName4ch(&l2->ch), __func__); | |
1b2b03f8 KK |
1126 | return; |
1127 | } | |
59ae1d12 | 1128 | skb_put_data(skb, tmp, i); |
1b2b03f8 KK |
1129 | enqueue_super(l2, skb); |
1130 | } | |
1131 | ||
1132 | inline void | |
1133 | enquiry_response(struct layer2 *l2) | |
1134 | { | |
1135 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) | |
1136 | enquiry_cr(l2, RNR, RSP, 1); | |
1137 | else | |
1138 | enquiry_cr(l2, RR, RSP, 1); | |
1139 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1140 | } | |
1141 | ||
1142 | inline void | |
1143 | transmit_enquiry(struct layer2 *l2) | |
1144 | { | |
1145 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) | |
1146 | enquiry_cr(l2, RNR, CMD, 1); | |
1147 | else | |
1148 | enquiry_cr(l2, RR, CMD, 1); | |
1149 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1150 | start_t200(l2, 9); | |
1151 | } | |
1152 | ||
1153 | ||
1154 | static void | |
1155 | nrerrorrecovery(struct FsmInst *fi) | |
1156 | { | |
1157 | struct layer2 *l2 = fi->userdata; | |
1158 | ||
1159 | l2mgr(l2, MDL_ERROR_IND, (void *) 'J'); | |
1160 | establishlink(fi); | |
1161 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1162 | } | |
1163 | ||
1164 | static void | |
1165 | invoke_retransmission(struct layer2 *l2, unsigned int nr) | |
1166 | { | |
1167 | u_int p1; | |
1168 | ||
1169 | if (l2->vs != nr) { | |
1170 | while (l2->vs != nr) { | |
1171 | (l2->vs)--; | |
1172 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1173 | l2->vs %= 128; | |
1174 | p1 = (l2->vs - l2->va) % 128; | |
1175 | } else { | |
1176 | l2->vs %= 8; | |
1177 | p1 = (l2->vs - l2->va) % 8; | |
1178 | } | |
1179 | p1 = (p1 + l2->sow) % l2->window; | |
1180 | if (l2->windowar[p1]) | |
1181 | skb_queue_head(&l2->i_queue, l2->windowar[p1]); | |
1182 | else | |
1183 | printk(KERN_WARNING | |
475be4d8 | 1184 | "%s: windowar[%d] is NULL\n", |
f45ebf3a | 1185 | mISDNDevName4ch(&l2->ch), p1); |
1b2b03f8 KK |
1186 | l2->windowar[p1] = NULL; |
1187 | } | |
1188 | mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL); | |
1189 | } | |
1190 | } | |
1191 | ||
1192 | static void | |
1193 | l2_st7_got_super(struct FsmInst *fi, int event, void *arg) | |
1194 | { | |
1195 | struct layer2 *l2 = fi->userdata; | |
1196 | struct sk_buff *skb = arg; | |
1197 | int PollFlag, rsp, typ = RR; | |
1198 | unsigned int nr; | |
1199 | ||
1200 | rsp = *skb->data & 0x2; | |
1201 | if (test_bit(FLG_ORIG, &l2->flag)) | |
1202 | rsp = !rsp; | |
1203 | ||
1204 | skb_pull(skb, l2addrsize(l2)); | |
1205 | if (IsRNR(skb->data, l2)) { | |
1206 | set_peer_busy(l2); | |
1207 | typ = RNR; | |
1208 | } else | |
1209 | clear_peer_busy(l2); | |
1210 | if (IsREJ(skb->data, l2)) | |
1211 | typ = REJ; | |
1212 | ||
1213 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1214 | PollFlag = (skb->data[1] & 0x1) == 0x1; | |
1215 | nr = skb->data[1] >> 1; | |
1216 | } else { | |
1217 | PollFlag = (skb->data[0] & 0x10); | |
1218 | nr = (skb->data[0] >> 5) & 0x7; | |
1219 | } | |
1220 | dev_kfree_skb(skb); | |
1221 | ||
1222 | if (PollFlag) { | |
1223 | if (rsp) | |
1224 | l2mgr(l2, MDL_ERROR_IND, (void *) 'A'); | |
1225 | else | |
1226 | enquiry_response(l2); | |
1227 | } | |
1228 | if (legalnr(l2, nr)) { | |
1229 | if (typ == REJ) { | |
1230 | setva(l2, nr); | |
1231 | invoke_retransmission(l2, nr); | |
1232 | stop_t200(l2, 10); | |
1233 | if (mISDN_FsmAddTimer(&l2->t203, l2->T203, | |
475be4d8 | 1234 | EV_L2_T203, NULL, 6)) |
1b2b03f8 KK |
1235 | l2m_debug(&l2->l2m, "Restart T203 ST7 REJ"); |
1236 | } else if ((nr == l2->vs) && (typ == RR)) { | |
1237 | setva(l2, nr); | |
1238 | stop_t200(l2, 11); | |
1239 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, | |
475be4d8 | 1240 | EV_L2_T203, NULL, 7); |
1b2b03f8 KK |
1241 | } else if ((l2->va != nr) || (typ == RNR)) { |
1242 | setva(l2, nr); | |
1243 | if (typ != RR) | |
1244 | mISDN_FsmDelTimer(&l2->t203, 9); | |
1245 | restart_t200(l2, 12); | |
1246 | } | |
1247 | if (skb_queue_len(&l2->i_queue) && (typ == RR)) | |
1248 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1249 | } else | |
1250 | nrerrorrecovery(fi); | |
1251 | } | |
1252 | ||
1253 | static void | |
1254 | l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg) | |
1255 | { | |
1256 | struct layer2 *l2 = fi->userdata; | |
1257 | struct sk_buff *skb = arg; | |
1258 | ||
1259 | if (!test_bit(FLG_L3_INIT, &l2->flag)) | |
1260 | skb_queue_tail(&l2->i_queue, skb); | |
1261 | else | |
1262 | dev_kfree_skb(skb); | |
1263 | } | |
1264 | ||
1265 | static void | |
1266 | l2_feed_i_pull(struct FsmInst *fi, int event, void *arg) | |
1267 | { | |
1268 | struct layer2 *l2 = fi->userdata; | |
1269 | struct sk_buff *skb = arg; | |
1270 | ||
1271 | skb_queue_tail(&l2->i_queue, skb); | |
1272 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1273 | } | |
1274 | ||
1275 | static void | |
1276 | l2_feed_iqueue(struct FsmInst *fi, int event, void *arg) | |
1277 | { | |
1278 | struct layer2 *l2 = fi->userdata; | |
1279 | struct sk_buff *skb = arg; | |
1280 | ||
1281 | skb_queue_tail(&l2->i_queue, skb); | |
1282 | } | |
1283 | ||
1284 | static void | |
1285 | l2_got_iframe(struct FsmInst *fi, int event, void *arg) | |
1286 | { | |
1287 | struct layer2 *l2 = fi->userdata; | |
1288 | struct sk_buff *skb = arg; | |
1289 | int PollFlag, i; | |
1290 | u_int ns, nr; | |
1291 | ||
1292 | i = l2addrsize(l2); | |
1293 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1294 | PollFlag = ((skb->data[i + 1] & 0x1) == 0x1); | |
1295 | ns = skb->data[i] >> 1; | |
1296 | nr = (skb->data[i + 1] >> 1) & 0x7f; | |
1297 | } else { | |
1298 | PollFlag = (skb->data[i] & 0x10); | |
1299 | ns = (skb->data[i] >> 1) & 0x7; | |
1300 | nr = (skb->data[i] >> 5) & 0x7; | |
1301 | } | |
1302 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) { | |
1303 | dev_kfree_skb(skb); | |
1304 | if (PollFlag) | |
1305 | enquiry_response(l2); | |
1306 | } else { | |
1307 | if (l2->vr == ns) { | |
1308 | l2->vr++; | |
1309 | if (test_bit(FLG_MOD128, &l2->flag)) | |
1310 | l2->vr %= 128; | |
1311 | else | |
1312 | l2->vr %= 8; | |
1313 | test_and_clear_bit(FLG_REJEXC, &l2->flag); | |
1314 | if (PollFlag) | |
1315 | enquiry_response(l2); | |
1316 | else | |
1317 | test_and_set_bit(FLG_ACK_PEND, &l2->flag); | |
1318 | skb_pull(skb, l2headersize(l2, 0)); | |
1319 | l2up(l2, DL_DATA_IND, skb); | |
1320 | } else { | |
1321 | /* n(s)!=v(r) */ | |
1322 | dev_kfree_skb(skb); | |
1323 | if (test_and_set_bit(FLG_REJEXC, &l2->flag)) { | |
1324 | if (PollFlag) | |
1325 | enquiry_response(l2); | |
1326 | } else { | |
1327 | enquiry_cr(l2, REJ, RSP, PollFlag); | |
1328 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1329 | } | |
1330 | } | |
1331 | } | |
1332 | if (legalnr(l2, nr)) { | |
1333 | if (!test_bit(FLG_PEER_BUSY, &l2->flag) && | |
1334 | (fi->state == ST_L2_7)) { | |
1335 | if (nr == l2->vs) { | |
1336 | stop_t200(l2, 13); | |
1337 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, | |
475be4d8 | 1338 | EV_L2_T203, NULL, 7); |
1b2b03f8 KK |
1339 | } else if (nr != l2->va) |
1340 | restart_t200(l2, 14); | |
1341 | } | |
1342 | setva(l2, nr); | |
1343 | } else { | |
1344 | nrerrorrecovery(fi); | |
1345 | return; | |
1346 | } | |
1347 | if (skb_queue_len(&l2->i_queue) && (fi->state == ST_L2_7)) | |
1348 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1349 | if (test_and_clear_bit(FLG_ACK_PEND, &l2->flag)) | |
1350 | enquiry_cr(l2, RR, RSP, 0); | |
1351 | } | |
1352 | ||
1353 | static void | |
1354 | l2_got_tei(struct FsmInst *fi, int event, void *arg) | |
1355 | { | |
1356 | struct layer2 *l2 = fi->userdata; | |
1357 | u_int info; | |
1358 | ||
1359 | l2->tei = (signed char)(long)arg; | |
1360 | set_channel_address(&l2->ch, l2->sapi, l2->tei); | |
1361 | info = DL_INFO_L2_CONNECT; | |
1362 | l2up_create(l2, DL_INFORMATION_IND, sizeof(info), &info); | |
1363 | if (fi->state == ST_L2_3) { | |
1364 | establishlink(fi); | |
1365 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
1366 | } else | |
1367 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1368 | if (skb_queue_len(&l2->ui_queue)) | |
1369 | tx_ui(l2); | |
1370 | } | |
1371 | ||
1372 | static void | |
1373 | l2_st5_tout_200(struct FsmInst *fi, int event, void *arg) | |
1374 | { | |
1375 | struct layer2 *l2 = fi->userdata; | |
1376 | ||
1377 | if (test_bit(FLG_LAPD, &l2->flag) && | |
475be4d8 | 1378 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
1b2b03f8 KK |
1379 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
1380 | } else if (l2->rc == l2->N200) { | |
1381 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1382 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1383 | skb_queue_purge(&l2->i_queue); | |
1384 | l2mgr(l2, MDL_ERROR_IND, (void *) 'G'); | |
1385 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1386 | l2down_create(l2, PH_DEACTIVATE_REQ, | |
475be4d8 | 1387 | l2_newid(l2), 0, NULL); |
1b2b03f8 KK |
1388 | st5_dl_release_l2l3(l2); |
1389 | if (l2->tm) | |
1390 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1391 | } else { | |
1392 | l2->rc++; | |
1393 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); | |
1394 | send_uframe(l2, NULL, (test_bit(FLG_MOD128, &l2->flag) ? | |
475be4d8 | 1395 | SABME : SABM) | 0x10, CMD); |
1b2b03f8 KK |
1396 | } |
1397 | } | |
1398 | ||
1399 | static void | |
1400 | l2_st6_tout_200(struct FsmInst *fi, int event, void *arg) | |
1401 | { | |
1402 | struct layer2 *l2 = fi->userdata; | |
1403 | ||
1404 | if (test_bit(FLG_LAPD, &l2->flag) && | |
475be4d8 | 1405 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
1b2b03f8 KK |
1406 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
1407 | } else if (l2->rc == l2->N200) { | |
1408 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1409 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1410 | l2mgr(l2, MDL_ERROR_IND, (void *) 'H'); | |
1411 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); | |
1412 | if (l2->tm) | |
1413 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1414 | } else { | |
1415 | l2->rc++; | |
1416 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, | |
475be4d8 | 1417 | NULL, 9); |
1b2b03f8 KK |
1418 | send_uframe(l2, NULL, DISC | 0x10, CMD); |
1419 | } | |
1420 | } | |
1421 | ||
1422 | static void | |
1423 | l2_st7_tout_200(struct FsmInst *fi, int event, void *arg) | |
1424 | { | |
1425 | struct layer2 *l2 = fi->userdata; | |
1426 | ||
1427 | if (test_bit(FLG_LAPD, &l2->flag) && | |
475be4d8 | 1428 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
1b2b03f8 KK |
1429 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
1430 | return; | |
1431 | } | |
1432 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1433 | l2->rc = 0; | |
1434 | mISDN_FsmChangeState(fi, ST_L2_8); | |
1435 | transmit_enquiry(l2); | |
1436 | l2->rc++; | |
1437 | } | |
1438 | ||
1439 | static void | |
1440 | l2_st8_tout_200(struct FsmInst *fi, int event, void *arg) | |
1441 | { | |
1442 | struct layer2 *l2 = fi->userdata; | |
1443 | ||
1444 | if (test_bit(FLG_LAPD, &l2->flag) && | |
475be4d8 | 1445 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
1b2b03f8 KK |
1446 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
1447 | return; | |
1448 | } | |
1449 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1450 | if (l2->rc == l2->N200) { | |
1451 | l2mgr(l2, MDL_ERROR_IND, (void *) 'I'); | |
1452 | establishlink(fi); | |
1453 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1454 | } else { | |
1455 | transmit_enquiry(l2); | |
1456 | l2->rc++; | |
1457 | } | |
1458 | } | |
1459 | ||
1460 | static void | |
1461 | l2_st7_tout_203(struct FsmInst *fi, int event, void *arg) | |
1462 | { | |
1463 | struct layer2 *l2 = fi->userdata; | |
1464 | ||
1465 | if (test_bit(FLG_LAPD, &l2->flag) && | |
475be4d8 | 1466 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
1b2b03f8 KK |
1467 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 9); |
1468 | return; | |
1469 | } | |
1470 | mISDN_FsmChangeState(fi, ST_L2_8); | |
1471 | transmit_enquiry(l2); | |
1472 | l2->rc = 0; | |
1473 | } | |
1474 | ||
1475 | static void | |
1476 | l2_pull_iqueue(struct FsmInst *fi, int event, void *arg) | |
1477 | { | |
1478 | struct layer2 *l2 = fi->userdata; | |
c96356a9 | 1479 | struct sk_buff *skb, *nskb; |
1b2b03f8 KK |
1480 | u_char header[MAX_L2HEADER_LEN]; |
1481 | u_int i, p1; | |
1482 | ||
1483 | if (!cansend(l2)) | |
1484 | return; | |
1485 | ||
1486 | skb = skb_dequeue(&l2->i_queue); | |
1487 | if (!skb) | |
1488 | return; | |
1b2b03f8 KK |
1489 | i = sethdraddr(l2, header, CMD); |
1490 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1491 | header[i++] = l2->vs << 1; | |
1492 | header[i++] = l2->vr << 1; | |
c96356a9 KK |
1493 | } else |
1494 | header[i++] = (l2->vr << 5) | (l2->vs << 1); | |
1495 | nskb = skb_realloc_headroom(skb, i); | |
1496 | if (!nskb) { | |
1497 | printk(KERN_WARNING "%s: no headroom(%d) copy for IFrame\n", | |
1498 | mISDNDevName4ch(&l2->ch), i); | |
1499 | skb_queue_head(&l2->i_queue, skb); | |
1500 | return; | |
1501 | } | |
1502 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1503 | p1 = (l2->vs - l2->va) % 128; | |
1b2b03f8 KK |
1504 | l2->vs = (l2->vs + 1) % 128; |
1505 | } else { | |
c96356a9 | 1506 | p1 = (l2->vs - l2->va) % 8; |
1b2b03f8 KK |
1507 | l2->vs = (l2->vs + 1) % 8; |
1508 | } | |
c96356a9 KK |
1509 | p1 = (p1 + l2->sow) % l2->window; |
1510 | if (l2->windowar[p1]) { | |
1511 | printk(KERN_WARNING "%s: l2 try overwrite ack queue entry %d\n", | |
1512 | mISDNDevName4ch(&l2->ch), p1); | |
1513 | dev_kfree_skb(l2->windowar[p1]); | |
1b2b03f8 | 1514 | } |
c96356a9 KK |
1515 | l2->windowar[p1] = skb; |
1516 | memcpy(skb_push(nskb, i), header, i); | |
1b2b03f8 KK |
1517 | l2down(l2, PH_DATA_REQ, l2_newid(l2), nskb); |
1518 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1519 | if (!test_and_set_bit(FLG_T200_RUN, &l2->flag)) { | |
1520 | mISDN_FsmDelTimer(&l2->t203, 13); | |
1521 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 11); | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | static void | |
1526 | l2_st8_got_super(struct FsmInst *fi, int event, void *arg) | |
1527 | { | |
1528 | struct layer2 *l2 = fi->userdata; | |
1529 | struct sk_buff *skb = arg; | |
1530 | int PollFlag, rsp, rnr = 0; | |
1531 | unsigned int nr; | |
1532 | ||
1533 | rsp = *skb->data & 0x2; | |
1534 | if (test_bit(FLG_ORIG, &l2->flag)) | |
1535 | rsp = !rsp; | |
1536 | ||
1537 | skb_pull(skb, l2addrsize(l2)); | |
1538 | ||
1539 | if (IsRNR(skb->data, l2)) { | |
1540 | set_peer_busy(l2); | |
1541 | rnr = 1; | |
1542 | } else | |
1543 | clear_peer_busy(l2); | |
1544 | ||
1545 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1546 | PollFlag = (skb->data[1] & 0x1) == 0x1; | |
1547 | nr = skb->data[1] >> 1; | |
1548 | } else { | |
1549 | PollFlag = (skb->data[0] & 0x10); | |
1550 | nr = (skb->data[0] >> 5) & 0x7; | |
1551 | } | |
1552 | dev_kfree_skb(skb); | |
1553 | if (rsp && PollFlag) { | |
1554 | if (legalnr(l2, nr)) { | |
1555 | if (rnr) { | |
1556 | restart_t200(l2, 15); | |
1557 | } else { | |
1558 | stop_t200(l2, 16); | |
1559 | mISDN_FsmAddTimer(&l2->t203, l2->T203, | |
475be4d8 | 1560 | EV_L2_T203, NULL, 5); |
1b2b03f8 KK |
1561 | setva(l2, nr); |
1562 | } | |
1563 | invoke_retransmission(l2, nr); | |
1564 | mISDN_FsmChangeState(fi, ST_L2_7); | |
1565 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) | |
1566 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1567 | } else | |
1568 | nrerrorrecovery(fi); | |
1569 | } else { | |
1570 | if (!rsp && PollFlag) | |
1571 | enquiry_response(l2); | |
1572 | if (legalnr(l2, nr)) | |
1573 | setva(l2, nr); | |
1574 | else | |
1575 | nrerrorrecovery(fi); | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | static void | |
1580 | l2_got_FRMR(struct FsmInst *fi, int event, void *arg) | |
1581 | { | |
1582 | struct layer2 *l2 = fi->userdata; | |
1583 | struct sk_buff *skb = arg; | |
1584 | ||
1585 | skb_pull(skb, l2addrsize(l2) + 1); | |
1586 | ||
1587 | if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */ | |
1588 | (IsUA(skb->data) && (fi->state == ST_L2_7))) { | |
1589 | l2mgr(l2, MDL_ERROR_IND, (void *) 'K'); | |
1590 | establishlink(fi); | |
1591 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1592 | } | |
1593 | dev_kfree_skb(skb); | |
1594 | } | |
1595 | ||
1596 | static void | |
1597 | l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1598 | { | |
1599 | struct layer2 *l2 = fi->userdata; | |
1600 | ||
1601 | skb_queue_purge(&l2->ui_queue); | |
1602 | l2->tei = GROUP_TEI; | |
1603 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1604 | } | |
1605 | ||
1606 | static void | |
1607 | l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1608 | { | |
1609 | struct layer2 *l2 = fi->userdata; | |
1610 | ||
1611 | skb_queue_purge(&l2->ui_queue); | |
1612 | l2->tei = GROUP_TEI; | |
1613 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); | |
1614 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1615 | } | |
1616 | ||
1617 | static void | |
1618 | l2_st5_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 | st5_dl_release_l2l3(l2); | |
1628 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1629 | } | |
1630 | ||
1631 | static void | |
1632 | l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1633 | { | |
1634 | struct layer2 *l2 = fi->userdata; | |
1635 | ||
1636 | skb_queue_purge(&l2->ui_queue); | |
1637 | l2->tei = GROUP_TEI; | |
1638 | stop_t200(l2, 18); | |
1639 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); | |
1640 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1641 | } | |
1642 | ||
1643 | static void | |
1644 | l2_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1645 | { | |
1646 | struct layer2 *l2 = fi->userdata; | |
1647 | ||
1648 | skb_queue_purge(&l2->i_queue); | |
1649 | skb_queue_purge(&l2->ui_queue); | |
1650 | freewin(l2); | |
1651 | l2->tei = GROUP_TEI; | |
1652 | stop_t200(l2, 17); | |
1653 | mISDN_FsmDelTimer(&l2->t203, 19); | |
1654 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); | |
1655 | /* mISDN_queue_data(&l2->inst, l2->inst.id | MSG_BROADCAST, | |
1656 | * MGR_SHORTSTATUS_IND, SSTATUS_L2_RELEASED, | |
1657 | * 0, NULL, 0); | |
1658 | */ | |
1659 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1660 | } | |
1661 | ||
1662 | static void | |
95b8fbad | 1663 | l2_st14_persistent_da(struct FsmInst *fi, int event, void *arg) |
1b2b03f8 KK |
1664 | { |
1665 | struct layer2 *l2 = fi->userdata; | |
1666 | struct sk_buff *skb = arg; | |
1667 | ||
1668 | skb_queue_purge(&l2->i_queue); | |
1669 | skb_queue_purge(&l2->ui_queue); | |
1670 | if (test_and_clear_bit(FLG_ESTAB_PEND, &l2->flag)) | |
1671 | l2up(l2, DL_RELEASE_IND, skb); | |
1672 | else | |
1673 | dev_kfree_skb(skb); | |
1674 | } | |
1675 | ||
1676 | static void | |
95b8fbad | 1677 | l2_st5_persistent_da(struct FsmInst *fi, int event, void *arg) |
1b2b03f8 KK |
1678 | { |
1679 | struct layer2 *l2 = fi->userdata; | |
1680 | struct sk_buff *skb = arg; | |
1681 | ||
1682 | skb_queue_purge(&l2->i_queue); | |
1683 | skb_queue_purge(&l2->ui_queue); | |
1684 | freewin(l2); | |
1685 | stop_t200(l2, 19); | |
1686 | st5_dl_release_l2l3(l2); | |
1687 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1688 | if (l2->tm) | |
1689 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1690 | dev_kfree_skb(skb); | |
1691 | } | |
1692 | ||
1693 | static void | |
95b8fbad | 1694 | l2_st6_persistent_da(struct FsmInst *fi, int event, void *arg) |
1b2b03f8 KK |
1695 | { |
1696 | struct layer2 *l2 = fi->userdata; | |
1697 | struct sk_buff *skb = arg; | |
1698 | ||
1699 | skb_queue_purge(&l2->ui_queue); | |
1700 | stop_t200(l2, 20); | |
1701 | l2up(l2, DL_RELEASE_CNF, skb); | |
1702 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1703 | if (l2->tm) | |
1704 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1705 | } | |
1706 | ||
1707 | static void | |
95b8fbad | 1708 | l2_persistent_da(struct FsmInst *fi, int event, void *arg) |
1b2b03f8 KK |
1709 | { |
1710 | struct layer2 *l2 = fi->userdata; | |
1711 | struct sk_buff *skb = arg; | |
1712 | ||
1713 | skb_queue_purge(&l2->i_queue); | |
1714 | skb_queue_purge(&l2->ui_queue); | |
1715 | freewin(l2); | |
1716 | stop_t200(l2, 19); | |
1717 | mISDN_FsmDelTimer(&l2->t203, 19); | |
1718 | l2up(l2, DL_RELEASE_IND, skb); | |
1719 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1720 | if (l2->tm) | |
1721 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1722 | } | |
1723 | ||
1724 | static void | |
1725 | l2_set_own_busy(struct FsmInst *fi, int event, void *arg) | |
1726 | { | |
1727 | struct layer2 *l2 = fi->userdata; | |
1728 | struct sk_buff *skb = arg; | |
1729 | ||
1730 | if (!test_and_set_bit(FLG_OWN_BUSY, &l2->flag)) { | |
1731 | enquiry_cr(l2, RNR, RSP, 0); | |
1732 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1733 | } | |
1734 | if (skb) | |
1735 | dev_kfree_skb(skb); | |
1736 | } | |
1737 | ||
1738 | static void | |
1739 | l2_clear_own_busy(struct FsmInst *fi, int event, void *arg) | |
1740 | { | |
1741 | struct layer2 *l2 = fi->userdata; | |
1742 | struct sk_buff *skb = arg; | |
1743 | ||
1744 | if (!test_and_clear_bit(FLG_OWN_BUSY, &l2->flag)) { | |
1745 | enquiry_cr(l2, RR, RSP, 0); | |
1746 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1747 | } | |
1748 | if (skb) | |
1749 | dev_kfree_skb(skb); | |
1750 | } | |
1751 | ||
1752 | static void | |
1753 | l2_frame_error(struct FsmInst *fi, int event, void *arg) | |
1754 | { | |
1755 | struct layer2 *l2 = fi->userdata; | |
1756 | ||
1757 | l2mgr(l2, MDL_ERROR_IND, arg); | |
1758 | } | |
1759 | ||
1760 | static void | |
1761 | l2_frame_error_reest(struct FsmInst *fi, int event, void *arg) | |
1762 | { | |
1763 | struct layer2 *l2 = fi->userdata; | |
1764 | ||
1765 | l2mgr(l2, MDL_ERROR_IND, arg); | |
1766 | establishlink(fi); | |
1767 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1768 | } | |
1769 | ||
1770 | static struct FsmNode L2FnList[] = | |
1771 | { | |
1772 | {ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign}, | |
1773 | {ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3}, | |
1774 | {ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish}, | |
1775 | {ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3}, | |
1776 | {ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, | |
1777 | {ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, | |
1778 | {ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release}, | |
1779 | {ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel}, | |
1780 | {ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect}, | |
1781 | {ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect}, | |
1782 | {ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest}, | |
1783 | {ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull}, | |
1784 | {ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue}, | |
1785 | {ST_L2_1, EV_L2_DL_UNITDATA, l2_queue_ui_assign}, | |
1786 | {ST_L2_2, EV_L2_DL_UNITDATA, l2_queue_ui}, | |
1787 | {ST_L2_3, EV_L2_DL_UNITDATA, l2_queue_ui}, | |
1788 | {ST_L2_4, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1789 | {ST_L2_5, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1790 | {ST_L2_6, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1791 | {ST_L2_7, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1792 | {ST_L2_8, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1793 | {ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1794 | {ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1795 | {ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1796 | {ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove}, | |
1797 | {ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove}, | |
1798 | {ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove}, | |
1799 | {ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove}, | |
1800 | {ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove}, | |
1801 | {ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove}, | |
1802 | {ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove}, | |
1803 | {ST_L2_4, EV_L2_SABME, l2_start_multi}, | |
1804 | {ST_L2_5, EV_L2_SABME, l2_send_UA}, | |
1805 | {ST_L2_6, EV_L2_SABME, l2_send_DM}, | |
1806 | {ST_L2_7, EV_L2_SABME, l2_restart_multi}, | |
1807 | {ST_L2_8, EV_L2_SABME, l2_restart_multi}, | |
1808 | {ST_L2_4, EV_L2_DISC, l2_send_DM}, | |
1809 | {ST_L2_5, EV_L2_DISC, l2_send_DM}, | |
1810 | {ST_L2_6, EV_L2_DISC, l2_send_UA}, | |
1811 | {ST_L2_7, EV_L2_DISC, l2_stop_multi}, | |
1812 | {ST_L2_8, EV_L2_DISC, l2_stop_multi}, | |
1813 | {ST_L2_4, EV_L2_UA, l2_mdl_error_ua}, | |
1814 | {ST_L2_5, EV_L2_UA, l2_connected}, | |
1815 | {ST_L2_6, EV_L2_UA, l2_released}, | |
1816 | {ST_L2_7, EV_L2_UA, l2_mdl_error_ua}, | |
1817 | {ST_L2_8, EV_L2_UA, l2_mdl_error_ua}, | |
1818 | {ST_L2_4, EV_L2_DM, l2_reestablish}, | |
1819 | {ST_L2_5, EV_L2_DM, l2_st5_dm_release}, | |
1820 | {ST_L2_6, EV_L2_DM, l2_st6_dm_release}, | |
1821 | {ST_L2_7, EV_L2_DM, l2_mdl_error_dm}, | |
1822 | {ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm}, | |
1823 | {ST_L2_1, EV_L2_UI, l2_got_ui}, | |
1824 | {ST_L2_2, EV_L2_UI, l2_got_ui}, | |
1825 | {ST_L2_3, EV_L2_UI, l2_got_ui}, | |
1826 | {ST_L2_4, EV_L2_UI, l2_got_ui}, | |
1827 | {ST_L2_5, EV_L2_UI, l2_got_ui}, | |
1828 | {ST_L2_6, EV_L2_UI, l2_got_ui}, | |
1829 | {ST_L2_7, EV_L2_UI, l2_got_ui}, | |
1830 | {ST_L2_8, EV_L2_UI, l2_got_ui}, | |
1831 | {ST_L2_7, EV_L2_FRMR, l2_got_FRMR}, | |
1832 | {ST_L2_8, EV_L2_FRMR, l2_got_FRMR}, | |
1833 | {ST_L2_7, EV_L2_SUPER, l2_st7_got_super}, | |
1834 | {ST_L2_8, EV_L2_SUPER, l2_st8_got_super}, | |
1835 | {ST_L2_7, EV_L2_I, l2_got_iframe}, | |
1836 | {ST_L2_8, EV_L2_I, l2_got_iframe}, | |
8423e6b2 KK |
1837 | {ST_L2_5, EV_L2_T200, l2_timeout}, |
1838 | {ST_L2_6, EV_L2_T200, l2_timeout}, | |
1839 | {ST_L2_7, EV_L2_T200, l2_timeout}, | |
1840 | {ST_L2_8, EV_L2_T200, l2_timeout}, | |
1841 | {ST_L2_7, EV_L2_T203, l2_timeout}, | |
1842 | {ST_L2_5, EV_L2_T200I, l2_st5_tout_200}, | |
1843 | {ST_L2_6, EV_L2_T200I, l2_st6_tout_200}, | |
1844 | {ST_L2_7, EV_L2_T200I, l2_st7_tout_200}, | |
1845 | {ST_L2_8, EV_L2_T200I, l2_st8_tout_200}, | |
1846 | {ST_L2_7, EV_L2_T203I, l2_st7_tout_203}, | |
1b2b03f8 KK |
1847 | {ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue}, |
1848 | {ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, | |
1849 | {ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, | |
1850 | {ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, | |
1851 | {ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, | |
1852 | {ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1853 | {ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1854 | {ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1855 | {ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest}, | |
1856 | {ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest}, | |
95b8fbad | 1857 | {ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistent_da}, |
1b2b03f8 KK |
1858 | {ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove}, |
1859 | {ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove}, | |
95b8fbad JE |
1860 | {ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistent_da}, |
1861 | {ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistent_da}, | |
1862 | {ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistent_da}, | |
1863 | {ST_L2_7, EV_L1_DEACTIVATE, l2_persistent_da}, | |
1864 | {ST_L2_8, EV_L1_DEACTIVATE, l2_persistent_da}, | |
1b2b03f8 KK |
1865 | }; |
1866 | ||
1b2b03f8 KK |
1867 | static int |
1868 | ph_data_indication(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb) | |
1869 | { | |
1870 | u_char *datap = skb->data; | |
1871 | int ret = -EINVAL; | |
1872 | int psapi, ptei; | |
1873 | u_int l; | |
1874 | int c = 0; | |
1875 | ||
1876 | l = l2addrsize(l2); | |
1877 | if (skb->len <= l) { | |
1878 | mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *) 'N'); | |
1879 | return ret; | |
1880 | } | |
1881 | if (test_bit(FLG_LAPD, &l2->flag)) { /* Maybe not needed */ | |
1882 | psapi = *datap++; | |
1883 | ptei = *datap++; | |
1884 | if ((psapi & 1) || !(ptei & 1)) { | |
1885 | printk(KERN_WARNING | |
f45ebf3a KK |
1886 | "%s l2 D-channel frame wrong EA0/EA1\n", |
1887 | mISDNDevName4ch(&l2->ch)); | |
1b2b03f8 KK |
1888 | return ret; |
1889 | } | |
1890 | psapi >>= 2; | |
1891 | ptei >>= 1; | |
1892 | if (psapi != l2->sapi) { | |
25985edc | 1893 | /* not our business */ |
d796509a AE |
1894 | if (*debug & DEBUG_L2) |
1895 | printk(KERN_DEBUG "%s: sapi %d/%d mismatch\n", | |
f45ebf3a KK |
1896 | mISDNDevName4ch(&l2->ch), psapi, |
1897 | l2->sapi); | |
1b2b03f8 KK |
1898 | dev_kfree_skb(skb); |
1899 | return 0; | |
1900 | } | |
1901 | if ((ptei != l2->tei) && (ptei != GROUP_TEI)) { | |
25985edc | 1902 | /* not our business */ |
d796509a AE |
1903 | if (*debug & DEBUG_L2) |
1904 | printk(KERN_DEBUG "%s: tei %d/%d mismatch\n", | |
f45ebf3a | 1905 | mISDNDevName4ch(&l2->ch), ptei, l2->tei); |
1b2b03f8 KK |
1906 | dev_kfree_skb(skb); |
1907 | return 0; | |
1908 | } | |
1909 | } else | |
1910 | datap += l; | |
1911 | if (!(*datap & 1)) { /* I-Frame */ | |
1912 | c = iframe_error(l2, skb); | |
1913 | if (!c) | |
1914 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_I, skb); | |
1915 | } else if (IsSFrame(datap, l2)) { /* S-Frame */ | |
1916 | c = super_error(l2, skb); | |
1917 | if (!c) | |
1918 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_SUPER, skb); | |
1919 | } else if (IsUI(datap)) { | |
1920 | c = UI_error(l2, skb); | |
1921 | if (!c) | |
1922 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_UI, skb); | |
1923 | } else if (IsSABME(datap, l2)) { | |
1924 | c = unnum_error(l2, skb, CMD); | |
1925 | if (!c) | |
1926 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_SABME, skb); | |
1927 | } else if (IsUA(datap)) { | |
1928 | c = unnum_error(l2, skb, RSP); | |
1929 | if (!c) | |
1930 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_UA, skb); | |
1931 | } else if (IsDISC(datap)) { | |
1932 | c = unnum_error(l2, skb, CMD); | |
1933 | if (!c) | |
1934 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DISC, skb); | |
1935 | } else if (IsDM(datap)) { | |
1936 | c = unnum_error(l2, skb, RSP); | |
1937 | if (!c) | |
1938 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DM, skb); | |
1939 | } else if (IsFRMR(datap)) { | |
1940 | c = FRMR_error(l2, skb); | |
1941 | if (!c) | |
1942 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_FRMR, skb); | |
1943 | } else | |
1944 | c = 'L'; | |
1945 | if (c) { | |
f45ebf3a KK |
1946 | printk(KERN_WARNING "%s:l2 D-channel frame error %c\n", |
1947 | mISDNDevName4ch(&l2->ch), c); | |
1b2b03f8 KK |
1948 | mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *)(long)c); |
1949 | } | |
1950 | return ret; | |
1951 | } | |
1952 | ||
1953 | static int | |
1954 | l2_send(struct mISDNchannel *ch, struct sk_buff *skb) | |
1955 | { | |
1956 | struct layer2 *l2 = container_of(ch, struct layer2, ch); | |
1957 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
475be4d8 | 1958 | int ret = -EINVAL; |
1b2b03f8 KK |
1959 | |
1960 | if (*debug & DEBUG_L2_RECV) | |
f45ebf3a KK |
1961 | printk(KERN_DEBUG "%s: %s prim(%x) id(%x) sapi(%d) tei(%d)\n", |
1962 | __func__, mISDNDevName4ch(&l2->ch), hh->prim, hh->id, | |
1963 | l2->sapi, l2->tei); | |
8423e6b2 KK |
1964 | if (hh->prim == DL_INTERN_MSG) { |
1965 | struct mISDNhead *chh = hh + 1; /* saved copy */ | |
1966 | ||
1967 | *hh = *chh; | |
1968 | if (*debug & DEBUG_L2_RECV) | |
1969 | printk(KERN_DEBUG "%s: prim(%x) id(%x) internal msg\n", | |
f45ebf3a | 1970 | mISDNDevName4ch(&l2->ch), hh->prim, hh->id); |
8423e6b2 | 1971 | } |
1b2b03f8 KK |
1972 | switch (hh->prim) { |
1973 | case PH_DATA_IND: | |
1974 | ret = ph_data_indication(l2, hh, skb); | |
1975 | break; | |
1976 | case PH_DATA_CNF: | |
1977 | ret = ph_data_confirm(l2, hh, skb); | |
1978 | break; | |
1979 | case PH_ACTIVATE_IND: | |
1980 | test_and_set_bit(FLG_L1_ACTIV, &l2->flag); | |
1981 | l2up_create(l2, MPH_ACTIVATE_IND, 0, NULL); | |
1982 | if (test_and_clear_bit(FLG_ESTAB_PEND, &l2->flag)) | |
1983 | ret = mISDN_FsmEvent(&l2->l2m, | |
475be4d8 | 1984 | EV_L2_DL_ESTABLISH_REQ, skb); |
1b2b03f8 KK |
1985 | break; |
1986 | case PH_DEACTIVATE_IND: | |
1987 | test_and_clear_bit(FLG_L1_ACTIV, &l2->flag); | |
1988 | l2up_create(l2, MPH_DEACTIVATE_IND, 0, NULL); | |
1989 | ret = mISDN_FsmEvent(&l2->l2m, EV_L1_DEACTIVATE, skb); | |
1990 | break; | |
1991 | case MPH_INFORMATION_IND: | |
1992 | if (!l2->up) | |
1993 | break; | |
1994 | ret = l2->up->send(l2->up, skb); | |
1995 | break; | |
1996 | case DL_DATA_REQ: | |
1997 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_DATA, skb); | |
1998 | break; | |
1999 | case DL_UNITDATA_REQ: | |
2000 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_UNITDATA, skb); | |
2001 | break; | |
2002 | case DL_ESTABLISH_REQ: | |
2003 | if (test_bit(FLG_LAPB, &l2->flag)) | |
2004 | test_and_set_bit(FLG_ORIG, &l2->flag); | |
2005 | if (test_bit(FLG_L1_ACTIV, &l2->flag)) { | |
2006 | if (test_bit(FLG_LAPD, &l2->flag) || | |
475be4d8 | 2007 | test_bit(FLG_ORIG, &l2->flag)) |
1b2b03f8 | 2008 | ret = mISDN_FsmEvent(&l2->l2m, |
475be4d8 | 2009 | EV_L2_DL_ESTABLISH_REQ, skb); |
1b2b03f8 KK |
2010 | } else { |
2011 | if (test_bit(FLG_LAPD, &l2->flag) || | |
475be4d8 | 2012 | test_bit(FLG_ORIG, &l2->flag)) { |
1b2b03f8 | 2013 | test_and_set_bit(FLG_ESTAB_PEND, |
475be4d8 | 2014 | &l2->flag); |
1b2b03f8 KK |
2015 | } |
2016 | ret = l2down(l2, PH_ACTIVATE_REQ, l2_newid(l2), | |
475be4d8 | 2017 | skb); |
1b2b03f8 KK |
2018 | } |
2019 | break; | |
2020 | case DL_RELEASE_REQ: | |
2021 | if (test_bit(FLG_LAPB, &l2->flag)) | |
2022 | l2down_create(l2, PH_DEACTIVATE_REQ, | |
475be4d8 | 2023 | l2_newid(l2), 0, NULL); |
1b2b03f8 | 2024 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_RELEASE_REQ, |
475be4d8 | 2025 | skb); |
1b2b03f8 | 2026 | break; |
8423e6b2 KK |
2027 | case DL_TIMER200_IND: |
2028 | mISDN_FsmEvent(&l2->l2m, EV_L2_T200I, NULL); | |
2029 | break; | |
2030 | case DL_TIMER203_IND: | |
2031 | mISDN_FsmEvent(&l2->l2m, EV_L2_T203I, NULL); | |
2032 | break; | |
1b2b03f8 KK |
2033 | default: |
2034 | if (*debug & DEBUG_L2) | |
2035 | l2m_debug(&l2->l2m, "l2 unknown pr %04x", | |
475be4d8 | 2036 | hh->prim); |
1b2b03f8 KK |
2037 | } |
2038 | if (ret) { | |
2039 | dev_kfree_skb(skb); | |
2040 | ret = 0; | |
2041 | } | |
2042 | return ret; | |
2043 | } | |
2044 | ||
2045 | int | |
2046 | tei_l2(struct layer2 *l2, u_int cmd, u_long arg) | |
2047 | { | |
2048 | int ret = -EINVAL; | |
2049 | ||
2050 | if (*debug & DEBUG_L2_TEI) | |
f45ebf3a KK |
2051 | printk(KERN_DEBUG "%s: cmd(%x) in %s\n", |
2052 | mISDNDevName4ch(&l2->ch), cmd, __func__); | |
1b2b03f8 KK |
2053 | switch (cmd) { |
2054 | case (MDL_ASSIGN_REQ): | |
2055 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ASSIGN, (void *)arg); | |
2056 | break; | |
2057 | case (MDL_REMOVE_REQ): | |
2058 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_REMOVE, NULL); | |
2059 | break; | |
2060 | case (MDL_ERROR_IND): | |
2061 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL); | |
2062 | break; | |
2063 | case (MDL_ERROR_RSP): | |
2064 | /* ETS 300-125 5.3.2.1 Test: TC13010 */ | |
f45ebf3a KK |
2065 | printk(KERN_NOTICE "%s: MDL_ERROR|REQ (tei_l2)\n", |
2066 | mISDNDevName4ch(&l2->ch)); | |
1b2b03f8 KK |
2067 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL); |
2068 | break; | |
2069 | } | |
2070 | return ret; | |
2071 | } | |
2072 | ||
2073 | static void | |
2074 | release_l2(struct layer2 *l2) | |
2075 | { | |
2076 | mISDN_FsmDelTimer(&l2->t200, 21); | |
2077 | mISDN_FsmDelTimer(&l2->t203, 16); | |
2078 | skb_queue_purge(&l2->i_queue); | |
2079 | skb_queue_purge(&l2->ui_queue); | |
2080 | skb_queue_purge(&l2->down_queue); | |
2081 | ReleaseWin(l2); | |
2082 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
c5b61d59 | 2083 | TEIrelease(l2); |
1b2b03f8 KK |
2084 | if (l2->ch.st) |
2085 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, | |
475be4d8 | 2086 | CLOSE_CHANNEL, NULL); |
1b2b03f8 KK |
2087 | } |
2088 | kfree(l2); | |
2089 | } | |
2090 | ||
2091 | static int | |
2092 | l2_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
2093 | { | |
2094 | struct layer2 *l2 = container_of(ch, struct layer2, ch); | |
2095 | u_int info; | |
2096 | ||
2097 | if (*debug & DEBUG_L2_CTRL) | |
f45ebf3a KK |
2098 | printk(KERN_DEBUG "%s: %s cmd(%x)\n", |
2099 | mISDNDevName4ch(ch), __func__, cmd); | |
1b2b03f8 KK |
2100 | |
2101 | switch (cmd) { | |
2102 | case OPEN_CHANNEL: | |
2103 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
2104 | set_channel_address(&l2->ch, l2->sapi, l2->tei); | |
2105 | info = DL_INFO_L2_CONNECT; | |
2106 | l2up_create(l2, DL_INFORMATION_IND, | |
475be4d8 | 2107 | sizeof(info), &info); |
1b2b03f8 KK |
2108 | } |
2109 | break; | |
2110 | case CLOSE_CHANNEL: | |
2111 | if (l2->ch.peer) | |
2112 | l2->ch.peer->ctrl(l2->ch.peer, CLOSE_CHANNEL, NULL); | |
2113 | release_l2(l2); | |
2114 | break; | |
2115 | } | |
2116 | return 0; | |
2117 | } | |
2118 | ||
2119 | struct layer2 * | |
5b277b86 | 2120 | create_l2(struct mISDNchannel *ch, u_int protocol, u_long options, int tei, |
475be4d8 | 2121 | int sapi) |
1b2b03f8 KK |
2122 | { |
2123 | struct layer2 *l2; | |
2124 | struct channel_req rq; | |
2125 | ||
2126 | l2 = kzalloc(sizeof(struct layer2), GFP_KERNEL); | |
2127 | if (!l2) { | |
2128 | printk(KERN_ERR "kzalloc layer2 failed\n"); | |
2129 | return NULL; | |
2130 | } | |
2131 | l2->next_id = 1; | |
2132 | l2->down_id = MISDN_ID_NONE; | |
2133 | l2->up = ch; | |
2134 | l2->ch.st = ch->st; | |
2135 | l2->ch.send = l2_send; | |
2136 | l2->ch.ctrl = l2_ctrl; | |
2137 | switch (protocol) { | |
2138 | case ISDN_P_LAPD_NT: | |
2139 | test_and_set_bit(FLG_LAPD, &l2->flag); | |
2140 | test_and_set_bit(FLG_LAPD_NET, &l2->flag); | |
2141 | test_and_set_bit(FLG_MOD128, &l2->flag); | |
5b277b86 | 2142 | l2->sapi = sapi; |
1b2b03f8 KK |
2143 | l2->maxlen = MAX_DFRAME_LEN; |
2144 | if (test_bit(OPTION_L2_PMX, &options)) | |
2145 | l2->window = 7; | |
2146 | else | |
2147 | l2->window = 1; | |
2148 | if (test_bit(OPTION_L2_PTP, &options)) | |
2149 | test_and_set_bit(FLG_PTP, &l2->flag); | |
2150 | if (test_bit(OPTION_L2_FIXEDTEI, &options)) | |
2151 | test_and_set_bit(FLG_FIXED_TEI, &l2->flag); | |
5b277b86 | 2152 | l2->tei = tei; |
1b2b03f8 KK |
2153 | l2->T200 = 1000; |
2154 | l2->N200 = 3; | |
2155 | l2->T203 = 10000; | |
2156 | if (test_bit(OPTION_L2_PMX, &options)) | |
2157 | rq.protocol = ISDN_P_NT_E1; | |
2158 | else | |
2159 | rq.protocol = ISDN_P_NT_S0; | |
2160 | rq.adr.channel = 0; | |
2161 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, OPEN_CHANNEL, &rq); | |
2162 | break; | |
2163 | case ISDN_P_LAPD_TE: | |
2164 | test_and_set_bit(FLG_LAPD, &l2->flag); | |
2165 | test_and_set_bit(FLG_MOD128, &l2->flag); | |
2166 | test_and_set_bit(FLG_ORIG, &l2->flag); | |
5b277b86 | 2167 | l2->sapi = sapi; |
1b2b03f8 KK |
2168 | l2->maxlen = MAX_DFRAME_LEN; |
2169 | if (test_bit(OPTION_L2_PMX, &options)) | |
2170 | l2->window = 7; | |
2171 | else | |
2172 | l2->window = 1; | |
2173 | if (test_bit(OPTION_L2_PTP, &options)) | |
2174 | test_and_set_bit(FLG_PTP, &l2->flag); | |
2175 | if (test_bit(OPTION_L2_FIXEDTEI, &options)) | |
2176 | test_and_set_bit(FLG_FIXED_TEI, &l2->flag); | |
5b277b86 | 2177 | l2->tei = tei; |
1b2b03f8 KK |
2178 | l2->T200 = 1000; |
2179 | l2->N200 = 3; | |
2180 | l2->T203 = 10000; | |
2181 | if (test_bit(OPTION_L2_PMX, &options)) | |
2182 | rq.protocol = ISDN_P_TE_E1; | |
2183 | else | |
2184 | rq.protocol = ISDN_P_TE_S0; | |
2185 | rq.adr.channel = 0; | |
2186 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, OPEN_CHANNEL, &rq); | |
2187 | break; | |
2188 | case ISDN_P_B_X75SLP: | |
2189 | test_and_set_bit(FLG_LAPB, &l2->flag); | |
2190 | l2->window = 7; | |
2191 | l2->maxlen = MAX_DATA_SIZE; | |
2192 | l2->T200 = 1000; | |
2193 | l2->N200 = 4; | |
2194 | l2->T203 = 5000; | |
2195 | l2->addr.A = 3; | |
2196 | l2->addr.B = 1; | |
2197 | break; | |
2198 | default: | |
2199 | printk(KERN_ERR "layer2 create failed prt %x\n", | |
475be4d8 | 2200 | protocol); |
1b2b03f8 KK |
2201 | kfree(l2); |
2202 | return NULL; | |
2203 | } | |
2204 | skb_queue_head_init(&l2->i_queue); | |
2205 | skb_queue_head_init(&l2->ui_queue); | |
2206 | skb_queue_head_init(&l2->down_queue); | |
2207 | skb_queue_head_init(&l2->tmp_queue); | |
2208 | InitWin(l2); | |
2209 | l2->l2m.fsm = &l2fsm; | |
2210 | if (test_bit(FLG_LAPB, &l2->flag) || | |
25099335 | 2211 | test_bit(FLG_FIXED_TEI, &l2->flag) || |
475be4d8 | 2212 | test_bit(FLG_LAPD_NET, &l2->flag)) |
1b2b03f8 KK |
2213 | l2->l2m.state = ST_L2_4; |
2214 | else | |
2215 | l2->l2m.state = ST_L2_1; | |
2216 | l2->l2m.debug = *debug; | |
2217 | l2->l2m.userdata = l2; | |
2218 | l2->l2m.userint = 0; | |
2219 | l2->l2m.printdebug = l2m_debug; | |
2220 | ||
2221 | mISDN_FsmInitTimer(&l2->l2m, &l2->t200); | |
2222 | mISDN_FsmInitTimer(&l2->l2m, &l2->t203); | |
2223 | return l2; | |
2224 | } | |
2225 | ||
2226 | static int | |
2227 | x75create(struct channel_req *crq) | |
2228 | { | |
2229 | struct layer2 *l2; | |
2230 | ||
2231 | if (crq->protocol != ISDN_P_B_X75SLP) | |
2232 | return -EPROTONOSUPPORT; | |
5b277b86 | 2233 | l2 = create_l2(crq->ch, crq->protocol, 0, 0, 0); |
1b2b03f8 KK |
2234 | if (!l2) |
2235 | return -ENOMEM; | |
2236 | crq->ch = &l2->ch; | |
2237 | crq->protocol = ISDN_P_B_HDLC; | |
2238 | return 0; | |
2239 | } | |
2240 | ||
2241 | static struct Bprotocol X75SLP = { | |
2242 | .Bprotocols = (1 << (ISDN_P_B_X75SLP & ISDN_P_B_MASK)), | |
2243 | .name = "X75SLP", | |
2244 | .create = x75create | |
2245 | }; | |
2246 | ||
2247 | int | |
2248 | Isdnl2_Init(u_int *deb) | |
2249 | { | |
54a6a043 | 2250 | int res; |
1b2b03f8 KK |
2251 | debug = deb; |
2252 | mISDN_register_Bprotocol(&X75SLP); | |
2253 | l2fsm.state_count = L2_STATE_COUNT; | |
2254 | l2fsm.event_count = L2_EVENT_COUNT; | |
2255 | l2fsm.strEvent = strL2Event; | |
2256 | l2fsm.strState = strL2State; | |
54a6a043 AV |
2257 | res = mISDN_FsmNew(&l2fsm, L2FnList, ARRAY_SIZE(L2FnList)); |
2258 | if (res) | |
2259 | goto error; | |
2260 | res = TEIInit(deb); | |
2261 | if (res) | |
2262 | goto error_fsm; | |
1b2b03f8 | 2263 | return 0; |
54a6a043 AV |
2264 | |
2265 | error_fsm: | |
2266 | mISDN_FsmFree(&l2fsm); | |
2267 | error: | |
2268 | mISDN_unregister_Bprotocol(&X75SLP); | |
2269 | return res; | |
1b2b03f8 KK |
2270 | } |
2271 | ||
2272 | void | |
2273 | Isdnl2_cleanup(void) | |
2274 | { | |
2275 | mISDN_unregister_Bprotocol(&X75SLP); | |
2276 | TEIFree(); | |
2277 | mISDN_FsmFree(&l2fsm); | |
2278 | } |