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1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1b2b03f8 KK |
2 | /* |
3 | * | |
4 | * Author Karsten Keil <kkeil@novell.com> | |
5 | * | |
6 | * Copyright 2008 by Karsten Keil <kkeil@novell.com> | |
1b2b03f8 KK |
7 | */ |
8 | ||
5b834354 | 9 | #include <linux/mISDNif.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
5b834354 | 11 | #include "core.h" |
1b2b03f8 KK |
12 | #include "fsm.h" |
13 | #include "layer2.h" | |
14 | ||
dfa96ec1 | 15 | static u_int *debug; |
1b2b03f8 KK |
16 | |
17 | static | |
18 | struct Fsm l2fsm = {NULL, 0, 0, NULL, NULL}; | |
19 | ||
20 | static char *strL2State[] = | |
21 | { | |
22 | "ST_L2_1", | |
23 | "ST_L2_2", | |
24 | "ST_L2_3", | |
25 | "ST_L2_4", | |
26 | "ST_L2_5", | |
27 | "ST_L2_6", | |
28 | "ST_L2_7", | |
29 | "ST_L2_8", | |
30 | }; | |
31 | ||
32 | enum { | |
33 | EV_L2_UI, | |
34 | EV_L2_SABME, | |
35 | EV_L2_DISC, | |
36 | EV_L2_DM, | |
37 | EV_L2_UA, | |
38 | EV_L2_FRMR, | |
39 | EV_L2_SUPER, | |
40 | EV_L2_I, | |
41 | EV_L2_DL_DATA, | |
42 | EV_L2_ACK_PULL, | |
43 | EV_L2_DL_UNITDATA, | |
44 | EV_L2_DL_ESTABLISH_REQ, | |
45 | EV_L2_DL_RELEASE_REQ, | |
46 | EV_L2_MDL_ASSIGN, | |
47 | EV_L2_MDL_REMOVE, | |
48 | EV_L2_MDL_ERROR, | |
49 | EV_L1_DEACTIVATE, | |
50 | EV_L2_T200, | |
51 | EV_L2_T203, | |
8423e6b2 KK |
52 | EV_L2_T200I, |
53 | EV_L2_T203I, | |
1b2b03f8 KK |
54 | EV_L2_SET_OWN_BUSY, |
55 | EV_L2_CLEAR_OWN_BUSY, | |
56 | EV_L2_FRAME_ERROR, | |
57 | }; | |
58 | ||
475be4d8 | 59 | #define L2_EVENT_COUNT (EV_L2_FRAME_ERROR + 1) |
1b2b03f8 KK |
60 | |
61 | static char *strL2Event[] = | |
62 | { | |
63 | "EV_L2_UI", | |
64 | "EV_L2_SABME", | |
65 | "EV_L2_DISC", | |
66 | "EV_L2_DM", | |
67 | "EV_L2_UA", | |
68 | "EV_L2_FRMR", | |
69 | "EV_L2_SUPER", | |
70 | "EV_L2_I", | |
71 | "EV_L2_DL_DATA", | |
72 | "EV_L2_ACK_PULL", | |
73 | "EV_L2_DL_UNITDATA", | |
74 | "EV_L2_DL_ESTABLISH_REQ", | |
75 | "EV_L2_DL_RELEASE_REQ", | |
76 | "EV_L2_MDL_ASSIGN", | |
77 | "EV_L2_MDL_REMOVE", | |
78 | "EV_L2_MDL_ERROR", | |
79 | "EV_L1_DEACTIVATE", | |
80 | "EV_L2_T200", | |
81 | "EV_L2_T203", | |
8423e6b2 KK |
82 | "EV_L2_T200I", |
83 | "EV_L2_T203I", | |
1b2b03f8 KK |
84 | "EV_L2_SET_OWN_BUSY", |
85 | "EV_L2_CLEAR_OWN_BUSY", | |
86 | "EV_L2_FRAME_ERROR", | |
87 | }; | |
88 | ||
89 | static void | |
90 | l2m_debug(struct FsmInst *fi, char *fmt, ...) | |
91 | { | |
92 | struct layer2 *l2 = fi->userdata; | |
020f01eb | 93 | struct va_format vaf; |
1b2b03f8 KK |
94 | va_list va; |
95 | ||
96 | if (!(*debug & DEBUG_L2_FSM)) | |
97 | return; | |
020f01eb | 98 | |
1b2b03f8 | 99 | va_start(va, fmt); |
020f01eb JP |
100 | |
101 | vaf.fmt = fmt; | |
102 | vaf.va = &va; | |
103 | ||
f45ebf3a KK |
104 | printk(KERN_DEBUG "%s l2 (sapi %d tei %d): %pV\n", |
105 | mISDNDevName4ch(&l2->ch), l2->sapi, l2->tei, &vaf); | |
020f01eb | 106 | |
1b2b03f8 KK |
107 | va_end(va); |
108 | } | |
109 | ||
110 | inline u_int | |
111 | l2headersize(struct layer2 *l2, int ui) | |
112 | { | |
113 | return ((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) + | |
114 | (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1); | |
115 | } | |
116 | ||
117 | inline u_int | |
118 | l2addrsize(struct layer2 *l2) | |
119 | { | |
120 | return test_bit(FLG_LAPD, &l2->flag) ? 2 : 1; | |
121 | } | |
122 | ||
123 | static u_int | |
124 | l2_newid(struct layer2 *l2) | |
125 | { | |
126 | u_int id; | |
127 | ||
128 | id = l2->next_id++; | |
129 | if (id == 0x7fff) | |
130 | l2->next_id = 1; | |
131 | id <<= 16; | |
132 | id |= l2->tei << 8; | |
133 | id |= l2->sapi; | |
134 | return id; | |
135 | } | |
136 | ||
137 | static void | |
138 | l2up(struct layer2 *l2, u_int prim, struct sk_buff *skb) | |
139 | { | |
140 | int err; | |
141 | ||
142 | if (!l2->up) | |
143 | return; | |
144 | mISDN_HEAD_PRIM(skb) = prim; | |
145 | mISDN_HEAD_ID(skb) = (l2->ch.nr << 16) | l2->ch.addr; | |
146 | err = l2->up->send(l2->up, skb); | |
147 | if (err) { | |
f45ebf3a KK |
148 | printk(KERN_WARNING "%s: dev %s err=%d\n", __func__, |
149 | mISDNDevName4ch(&l2->ch), err); | |
1b2b03f8 KK |
150 | dev_kfree_skb(skb); |
151 | } | |
152 | } | |
153 | ||
154 | static void | |
155 | l2up_create(struct layer2 *l2, u_int prim, int len, void *arg) | |
156 | { | |
157 | struct sk_buff *skb; | |
158 | struct mISDNhead *hh; | |
159 | int err; | |
160 | ||
161 | if (!l2->up) | |
162 | return; | |
163 | skb = mI_alloc_skb(len, GFP_ATOMIC); | |
164 | if (!skb) | |
165 | return; | |
166 | hh = mISDN_HEAD_P(skb); | |
167 | hh->prim = prim; | |
168 | hh->id = (l2->ch.nr << 16) | l2->ch.addr; | |
169 | if (len) | |
59ae1d12 | 170 | skb_put_data(skb, arg, len); |
1b2b03f8 KK |
171 | err = l2->up->send(l2->up, skb); |
172 | if (err) { | |
f45ebf3a KK |
173 | printk(KERN_WARNING "%s: dev %s err=%d\n", __func__, |
174 | mISDNDevName4ch(&l2->ch), err); | |
1b2b03f8 KK |
175 | dev_kfree_skb(skb); |
176 | } | |
177 | } | |
178 | ||
179 | static int | |
180 | l2down_skb(struct layer2 *l2, struct sk_buff *skb) { | |
181 | int ret; | |
182 | ||
183 | ret = l2->ch.recv(l2->ch.peer, skb); | |
184 | if (ret && (*debug & DEBUG_L2_RECV)) | |
f45ebf3a KK |
185 | printk(KERN_DEBUG "l2down_skb: dev %s ret(%d)\n", |
186 | mISDNDevName4ch(&l2->ch), ret); | |
1b2b03f8 KK |
187 | return ret; |
188 | } | |
189 | ||
190 | static int | |
191 | l2down_raw(struct layer2 *l2, struct sk_buff *skb) | |
192 | { | |
193 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
194 | ||
195 | if (hh->prim == PH_DATA_REQ) { | |
196 | if (test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) { | |
197 | skb_queue_tail(&l2->down_queue, skb); | |
198 | return 0; | |
199 | } | |
200 | l2->down_id = mISDN_HEAD_ID(skb); | |
201 | } | |
202 | return l2down_skb(l2, skb); | |
203 | } | |
204 | ||
205 | static int | |
206 | l2down(struct layer2 *l2, u_int prim, u_int id, struct sk_buff *skb) | |
207 | { | |
208 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
209 | ||
210 | hh->prim = prim; | |
211 | hh->id = id; | |
212 | return l2down_raw(l2, skb); | |
213 | } | |
214 | ||
215 | static int | |
216 | l2down_create(struct layer2 *l2, u_int prim, u_int id, int len, void *arg) | |
217 | { | |
218 | struct sk_buff *skb; | |
219 | int err; | |
220 | struct mISDNhead *hh; | |
221 | ||
222 | skb = mI_alloc_skb(len, GFP_ATOMIC); | |
223 | if (!skb) | |
224 | return -ENOMEM; | |
225 | hh = mISDN_HEAD_P(skb); | |
226 | hh->prim = prim; | |
227 | hh->id = id; | |
228 | if (len) | |
59ae1d12 | 229 | skb_put_data(skb, arg, len); |
1b2b03f8 KK |
230 | err = l2down_raw(l2, skb); |
231 | if (err) | |
232 | dev_kfree_skb(skb); | |
233 | return err; | |
234 | } | |
235 | ||
236 | static int | |
237 | ph_data_confirm(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb) { | |
238 | struct sk_buff *nskb = skb; | |
239 | int ret = -EAGAIN; | |
240 | ||
241 | if (test_bit(FLG_L1_NOTREADY, &l2->flag)) { | |
242 | if (hh->id == l2->down_id) { | |
243 | nskb = skb_dequeue(&l2->down_queue); | |
244 | if (nskb) { | |
245 | l2->down_id = mISDN_HEAD_ID(nskb); | |
246 | if (l2down_skb(l2, nskb)) { | |
247 | dev_kfree_skb(nskb); | |
248 | l2->down_id = MISDN_ID_NONE; | |
249 | } | |
250 | } else | |
251 | l2->down_id = MISDN_ID_NONE; | |
252 | if (ret) { | |
253 | dev_kfree_skb(skb); | |
254 | ret = 0; | |
255 | } | |
256 | if (l2->down_id == MISDN_ID_NONE) { | |
257 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); | |
258 | mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL); | |
259 | } | |
260 | } | |
261 | } | |
262 | if (!test_and_set_bit(FLG_L1_NOTREADY, &l2->flag)) { | |
263 | nskb = skb_dequeue(&l2->down_queue); | |
264 | if (nskb) { | |
265 | l2->down_id = mISDN_HEAD_ID(nskb); | |
266 | if (l2down_skb(l2, nskb)) { | |
267 | dev_kfree_skb(nskb); | |
268 | l2->down_id = MISDN_ID_NONE; | |
269 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); | |
270 | } | |
271 | } else | |
272 | test_and_clear_bit(FLG_L1_NOTREADY, &l2->flag); | |
273 | } | |
274 | return ret; | |
275 | } | |
276 | ||
8423e6b2 KK |
277 | static void |
278 | l2_timeout(struct FsmInst *fi, int event, void *arg) | |
279 | { | |
280 | struct layer2 *l2 = fi->userdata; | |
281 | struct sk_buff *skb; | |
282 | struct mISDNhead *hh; | |
283 | ||
284 | skb = mI_alloc_skb(0, GFP_ATOMIC); | |
285 | if (!skb) { | |
f45ebf3a KK |
286 | printk(KERN_WARNING "%s: L2(%d,%d) nr:%x timer %s no skb\n", |
287 | mISDNDevName4ch(&l2->ch), l2->sapi, l2->tei, | |
288 | l2->ch.nr, event == EV_L2_T200 ? "T200" : "T203"); | |
8423e6b2 KK |
289 | return; |
290 | } | |
291 | hh = mISDN_HEAD_P(skb); | |
292 | hh->prim = event == EV_L2_T200 ? DL_TIMER200_IND : DL_TIMER203_IND; | |
293 | hh->id = l2->ch.nr; | |
294 | if (*debug & DEBUG_TIMER) | |
f45ebf3a KK |
295 | printk(KERN_DEBUG "%s: L2(%d,%d) nr:%x timer %s expired\n", |
296 | mISDNDevName4ch(&l2->ch), l2->sapi, l2->tei, | |
297 | l2->ch.nr, event == EV_L2_T200 ? "T200" : "T203"); | |
8423e6b2 KK |
298 | if (l2->ch.st) |
299 | l2->ch.st->own.recv(&l2->ch.st->own, skb); | |
300 | } | |
301 | ||
1b2b03f8 KK |
302 | static int |
303 | l2mgr(struct layer2 *l2, u_int prim, void *arg) { | |
304 | long c = (long)arg; | |
305 | ||
f45ebf3a KK |
306 | printk(KERN_WARNING "l2mgr: dev %s addr:%x prim %x %c\n", |
307 | mISDNDevName4ch(&l2->ch), l2->id, prim, (char)c); | |
1b2b03f8 | 308 | if (test_bit(FLG_LAPD, &l2->flag) && |
475be4d8 | 309 | !test_bit(FLG_FIXED_TEI, &l2->flag)) { |
1b2b03f8 KK |
310 | switch (c) { |
311 | case 'C': | |
312 | case 'D': | |
313 | case 'G': | |
314 | case 'H': | |
315 | l2_tei(l2, prim, (u_long)arg); | |
316 | break; | |
317 | } | |
318 | } | |
319 | return 0; | |
320 | } | |
321 | ||
322 | static void | |
323 | set_peer_busy(struct layer2 *l2) { | |
324 | test_and_set_bit(FLG_PEER_BUSY, &l2->flag); | |
325 | if (skb_queue_len(&l2->i_queue) || skb_queue_len(&l2->ui_queue)) | |
326 | test_and_set_bit(FLG_L2BLOCK, &l2->flag); | |
327 | } | |
328 | ||
329 | static void | |
330 | clear_peer_busy(struct layer2 *l2) { | |
331 | if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag)) | |
332 | test_and_clear_bit(FLG_L2BLOCK, &l2->flag); | |
333 | } | |
334 | ||
335 | static void | |
336 | InitWin(struct layer2 *l2) | |
337 | { | |
338 | int i; | |
339 | ||
340 | for (i = 0; i < MAX_WINDOW; i++) | |
341 | l2->windowar[i] = NULL; | |
342 | } | |
343 | ||
344 | static int | |
345 | freewin(struct layer2 *l2) | |
346 | { | |
347 | int i, cnt = 0; | |
348 | ||
349 | for (i = 0; i < MAX_WINDOW; i++) { | |
350 | if (l2->windowar[i]) { | |
351 | cnt++; | |
352 | dev_kfree_skb(l2->windowar[i]); | |
353 | l2->windowar[i] = NULL; | |
354 | } | |
355 | } | |
356 | return cnt; | |
357 | } | |
358 | ||
359 | static void | |
360 | ReleaseWin(struct layer2 *l2) | |
361 | { | |
362 | int cnt = freewin(l2); | |
363 | ||
364 | if (cnt) | |
365 | printk(KERN_WARNING | |
475be4d8 | 366 | "isdnl2 freed %d skbuffs in release\n", cnt); |
1b2b03f8 KK |
367 | } |
368 | ||
369 | inline unsigned int | |
370 | cansend(struct layer2 *l2) | |
371 | { | |
372 | unsigned int p1; | |
373 | ||
374 | if (test_bit(FLG_MOD128, &l2->flag)) | |
375 | p1 = (l2->vs - l2->va) % 128; | |
376 | else | |
377 | p1 = (l2->vs - l2->va) % 8; | |
378 | return (p1 < l2->window) && !test_bit(FLG_PEER_BUSY, &l2->flag); | |
379 | } | |
380 | ||
381 | inline void | |
382 | clear_exception(struct layer2 *l2) | |
383 | { | |
384 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
385 | test_and_clear_bit(FLG_REJEXC, &l2->flag); | |
386 | test_and_clear_bit(FLG_OWN_BUSY, &l2->flag); | |
387 | clear_peer_busy(l2); | |
388 | } | |
389 | ||
390 | static int | |
391 | sethdraddr(struct layer2 *l2, u_char *header, int rsp) | |
392 | { | |
393 | u_char *ptr = header; | |
394 | int crbit = rsp; | |
395 | ||
396 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
397 | if (test_bit(FLG_LAPD_NET, &l2->flag)) | |
398 | crbit = !crbit; | |
399 | *ptr++ = (l2->sapi << 2) | (crbit ? 2 : 0); | |
400 | *ptr++ = (l2->tei << 1) | 1; | |
401 | return 2; | |
402 | } else { | |
403 | if (test_bit(FLG_ORIG, &l2->flag)) | |
404 | crbit = !crbit; | |
405 | if (crbit) | |
406 | *ptr++ = l2->addr.B; | |
407 | else | |
408 | *ptr++ = l2->addr.A; | |
409 | return 1; | |
410 | } | |
411 | } | |
412 | ||
413 | static inline void | |
414 | enqueue_super(struct layer2 *l2, struct sk_buff *skb) | |
415 | { | |
416 | if (l2down(l2, PH_DATA_REQ, l2_newid(l2), skb)) | |
417 | dev_kfree_skb(skb); | |
418 | } | |
419 | ||
420 | static inline void | |
421 | enqueue_ui(struct layer2 *l2, struct sk_buff *skb) | |
422 | { | |
423 | if (l2->tm) | |
424 | l2_tei(l2, MDL_STATUS_UI_IND, 0); | |
425 | if (l2down(l2, PH_DATA_REQ, l2_newid(l2), skb)) | |
426 | dev_kfree_skb(skb); | |
427 | } | |
428 | ||
429 | inline int | |
430 | IsUI(u_char *data) | |
431 | { | |
432 | return (data[0] & 0xef) == UI; | |
433 | } | |
434 | ||
435 | inline int | |
436 | IsUA(u_char *data) | |
437 | { | |
438 | return (data[0] & 0xef) == UA; | |
439 | } | |
440 | ||
441 | inline int | |
442 | IsDM(u_char *data) | |
443 | { | |
444 | return (data[0] & 0xef) == DM; | |
445 | } | |
446 | ||
447 | inline int | |
448 | IsDISC(u_char *data) | |
449 | { | |
450 | return (data[0] & 0xef) == DISC; | |
451 | } | |
452 | ||
453 | inline int | |
454 | IsRR(u_char *data, struct layer2 *l2) | |
455 | { | |
456 | if (test_bit(FLG_MOD128, &l2->flag)) | |
457 | return data[0] == RR; | |
458 | else | |
459 | return (data[0] & 0xf) == 1; | |
460 | } | |
461 | ||
462 | inline int | |
463 | IsSFrame(u_char *data, struct layer2 *l2) | |
464 | { | |
465 | register u_char d = *data; | |
466 | ||
467 | if (!test_bit(FLG_MOD128, &l2->flag)) | |
468 | d &= 0xf; | |
469 | return ((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c); | |
470 | } | |
471 | ||
472 | inline int | |
473 | IsSABME(u_char *data, struct layer2 *l2) | |
474 | { | |
475 | u_char d = data[0] & ~0x10; | |
476 | ||
477 | return test_bit(FLG_MOD128, &l2->flag) ? d == SABME : d == SABM; | |
478 | } | |
479 | ||
480 | inline int | |
481 | IsREJ(u_char *data, struct layer2 *l2) | |
482 | { | |
483 | return test_bit(FLG_MOD128, &l2->flag) ? | |
484 | data[0] == REJ : (data[0] & 0xf) == REJ; | |
485 | } | |
486 | ||
487 | inline int | |
488 | IsFRMR(u_char *data) | |
489 | { | |
490 | return (data[0] & 0xef) == FRMR; | |
491 | } | |
492 | ||
493 | inline int | |
494 | IsRNR(u_char *data, struct layer2 *l2) | |
495 | { | |
496 | return test_bit(FLG_MOD128, &l2->flag) ? | |
475be4d8 | 497 | data[0] == RNR : (data[0] & 0xf) == RNR; |
1b2b03f8 KK |
498 | } |
499 | ||
5b834354 | 500 | static int |
1b2b03f8 KK |
501 | iframe_error(struct layer2 *l2, struct sk_buff *skb) |
502 | { | |
503 | u_int i; | |
504 | int rsp = *skb->data & 0x2; | |
505 | ||
506 | i = l2addrsize(l2) + (test_bit(FLG_MOD128, &l2->flag) ? 2 : 1); | |
507 | if (test_bit(FLG_ORIG, &l2->flag)) | |
508 | rsp = !rsp; | |
509 | if (rsp) | |
510 | return 'L'; | |
511 | if (skb->len < i) | |
512 | return 'N'; | |
513 | if ((skb->len - i) > l2->maxlen) | |
514 | return 'O'; | |
515 | return 0; | |
516 | } | |
517 | ||
5b834354 | 518 | static int |
1b2b03f8 KK |
519 | super_error(struct layer2 *l2, struct sk_buff *skb) |
520 | { | |
521 | if (skb->len != l2addrsize(l2) + | |
522 | (test_bit(FLG_MOD128, &l2->flag) ? 2 : 1)) | |
523 | return 'N'; | |
524 | return 0; | |
525 | } | |
526 | ||
5b834354 | 527 | static int |
1b2b03f8 KK |
528 | unnum_error(struct layer2 *l2, struct sk_buff *skb, int wantrsp) |
529 | { | |
530 | int rsp = (*skb->data & 0x2) >> 1; | |
531 | if (test_bit(FLG_ORIG, &l2->flag)) | |
532 | rsp = !rsp; | |
533 | if (rsp != wantrsp) | |
534 | return 'L'; | |
535 | if (skb->len != l2addrsize(l2) + 1) | |
536 | return 'N'; | |
537 | return 0; | |
538 | } | |
539 | ||
5b834354 | 540 | static int |
1b2b03f8 KK |
541 | UI_error(struct layer2 *l2, struct sk_buff *skb) |
542 | { | |
543 | int rsp = *skb->data & 0x2; | |
544 | if (test_bit(FLG_ORIG, &l2->flag)) | |
545 | rsp = !rsp; | |
546 | if (rsp) | |
547 | return 'L'; | |
548 | if (skb->len > l2->maxlen + l2addrsize(l2) + 1) | |
549 | return 'O'; | |
550 | return 0; | |
551 | } | |
552 | ||
5b834354 | 553 | static int |
1b2b03f8 KK |
554 | FRMR_error(struct layer2 *l2, struct sk_buff *skb) |
555 | { | |
556 | u_int headers = l2addrsize(l2) + 1; | |
557 | u_char *datap = skb->data + headers; | |
558 | int rsp = *skb->data & 0x2; | |
559 | ||
560 | if (test_bit(FLG_ORIG, &l2->flag)) | |
561 | rsp = !rsp; | |
562 | if (!rsp) | |
563 | return 'L'; | |
564 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
565 | if (skb->len < headers + 5) | |
566 | return 'N'; | |
567 | else if (*debug & DEBUG_L2) | |
568 | l2m_debug(&l2->l2m, | |
475be4d8 JP |
569 | "FRMR information %2x %2x %2x %2x %2x", |
570 | datap[0], datap[1], datap[2], datap[3], datap[4]); | |
1b2b03f8 KK |
571 | } else { |
572 | if (skb->len < headers + 3) | |
573 | return 'N'; | |
574 | else if (*debug & DEBUG_L2) | |
575 | l2m_debug(&l2->l2m, | |
475be4d8 JP |
576 | "FRMR information %2x %2x %2x", |
577 | datap[0], datap[1], datap[2]); | |
1b2b03f8 KK |
578 | } |
579 | return 0; | |
580 | } | |
581 | ||
582 | static unsigned int | |
583 | legalnr(struct layer2 *l2, unsigned int nr) | |
584 | { | |
585 | if (test_bit(FLG_MOD128, &l2->flag)) | |
586 | return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128); | |
587 | else | |
588 | return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8); | |
589 | } | |
590 | ||
591 | static void | |
592 | setva(struct layer2 *l2, unsigned int nr) | |
593 | { | |
594 | struct sk_buff *skb; | |
595 | ||
596 | while (l2->va != nr) { | |
597 | l2->va++; | |
598 | if (test_bit(FLG_MOD128, &l2->flag)) | |
599 | l2->va %= 128; | |
600 | else | |
601 | l2->va %= 8; | |
602 | if (l2->windowar[l2->sow]) { | |
603 | skb_trim(l2->windowar[l2->sow], 0); | |
604 | skb_queue_tail(&l2->tmp_queue, l2->windowar[l2->sow]); | |
605 | l2->windowar[l2->sow] = NULL; | |
606 | } | |
607 | l2->sow = (l2->sow + 1) % l2->window; | |
608 | } | |
609 | skb = skb_dequeue(&l2->tmp_queue); | |
610 | while (skb) { | |
611 | dev_kfree_skb(skb); | |
612 | skb = skb_dequeue(&l2->tmp_queue); | |
613 | } | |
614 | } | |
615 | ||
616 | static void | |
617 | send_uframe(struct layer2 *l2, struct sk_buff *skb, u_char cmd, u_char cr) | |
618 | { | |
619 | u_char tmp[MAX_L2HEADER_LEN]; | |
620 | int i; | |
621 | ||
622 | i = sethdraddr(l2, tmp, cr); | |
623 | tmp[i++] = cmd; | |
624 | if (skb) | |
625 | skb_trim(skb, 0); | |
626 | else { | |
627 | skb = mI_alloc_skb(i, GFP_ATOMIC); | |
628 | if (!skb) { | |
f45ebf3a KK |
629 | printk(KERN_WARNING "%s: can't alloc skbuff in %s\n", |
630 | mISDNDevName4ch(&l2->ch), __func__); | |
1b2b03f8 KK |
631 | return; |
632 | } | |
633 | } | |
59ae1d12 | 634 | skb_put_data(skb, tmp, i); |
1b2b03f8 KK |
635 | enqueue_super(l2, skb); |
636 | } | |
637 | ||
638 | ||
639 | inline u_char | |
640 | get_PollFlag(struct layer2 *l2, struct sk_buff *skb) | |
641 | { | |
642 | return skb->data[l2addrsize(l2)] & 0x10; | |
643 | } | |
644 | ||
645 | inline u_char | |
646 | get_PollFlagFree(struct layer2 *l2, struct sk_buff *skb) | |
647 | { | |
648 | u_char PF; | |
649 | ||
650 | PF = get_PollFlag(l2, skb); | |
651 | dev_kfree_skb(skb); | |
652 | return PF; | |
653 | } | |
654 | ||
655 | inline void | |
656 | start_t200(struct layer2 *l2, int i) | |
657 | { | |
658 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, i); | |
659 | test_and_set_bit(FLG_T200_RUN, &l2->flag); | |
660 | } | |
661 | ||
662 | inline void | |
663 | restart_t200(struct layer2 *l2, int i) | |
664 | { | |
665 | mISDN_FsmRestartTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, i); | |
666 | test_and_set_bit(FLG_T200_RUN, &l2->flag); | |
667 | } | |
668 | ||
669 | inline void | |
670 | stop_t200(struct layer2 *l2, int i) | |
671 | { | |
672 | if (test_and_clear_bit(FLG_T200_RUN, &l2->flag)) | |
673 | mISDN_FsmDelTimer(&l2->t200, i); | |
674 | } | |
675 | ||
676 | inline void | |
677 | st5_dl_release_l2l3(struct layer2 *l2) | |
678 | { | |
679 | int pr; | |
680 | ||
681 | if (test_and_clear_bit(FLG_PEND_REL, &l2->flag)) | |
682 | pr = DL_RELEASE_CNF; | |
683 | else | |
684 | pr = DL_RELEASE_IND; | |
685 | l2up_create(l2, pr, 0, NULL); | |
686 | } | |
687 | ||
688 | inline void | |
689 | lapb_dl_release_l2l3(struct layer2 *l2, int f) | |
690 | { | |
691 | if (test_bit(FLG_LAPB, &l2->flag)) | |
692 | l2down_create(l2, PH_DEACTIVATE_REQ, l2_newid(l2), 0, NULL); | |
693 | l2up_create(l2, f, 0, NULL); | |
694 | } | |
695 | ||
696 | static void | |
697 | establishlink(struct FsmInst *fi) | |
698 | { | |
699 | struct layer2 *l2 = fi->userdata; | |
700 | u_char cmd; | |
701 | ||
702 | clear_exception(l2); | |
703 | l2->rc = 0; | |
704 | cmd = (test_bit(FLG_MOD128, &l2->flag) ? SABME : SABM) | 0x10; | |
705 | send_uframe(l2, NULL, cmd, CMD); | |
706 | mISDN_FsmDelTimer(&l2->t203, 1); | |
707 | restart_t200(l2, 1); | |
708 | test_and_clear_bit(FLG_PEND_REL, &l2->flag); | |
709 | freewin(l2); | |
710 | mISDN_FsmChangeState(fi, ST_L2_5); | |
711 | } | |
712 | ||
713 | static void | |
714 | l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg) | |
715 | { | |
716 | struct sk_buff *skb = arg; | |
717 | struct layer2 *l2 = fi->userdata; | |
718 | ||
719 | if (get_PollFlagFree(l2, skb)) | |
720 | l2mgr(l2, MDL_ERROR_IND, (void *) 'C'); | |
721 | else | |
722 | l2mgr(l2, MDL_ERROR_IND, (void *) 'D'); | |
723 | ||
724 | } | |
725 | ||
726 | static void | |
727 | l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg) | |
728 | { | |
729 | struct sk_buff *skb = arg; | |
730 | struct layer2 *l2 = fi->userdata; | |
731 | ||
732 | if (get_PollFlagFree(l2, skb)) | |
733 | l2mgr(l2, MDL_ERROR_IND, (void *) 'B'); | |
734 | else { | |
735 | l2mgr(l2, MDL_ERROR_IND, (void *) 'E'); | |
736 | establishlink(fi); | |
737 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
738 | } | |
739 | } | |
740 | ||
741 | static void | |
742 | l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg) | |
743 | { | |
744 | struct sk_buff *skb = arg; | |
745 | struct layer2 *l2 = fi->userdata; | |
746 | ||
747 | if (get_PollFlagFree(l2, skb)) | |
748 | l2mgr(l2, MDL_ERROR_IND, (void *) 'B'); | |
749 | else | |
750 | l2mgr(l2, MDL_ERROR_IND, (void *) 'E'); | |
751 | establishlink(fi); | |
752 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
753 | } | |
754 | ||
755 | static void | |
756 | l2_go_st3(struct FsmInst *fi, int event, void *arg) | |
757 | { | |
758 | dev_kfree_skb((struct sk_buff *)arg); | |
759 | mISDN_FsmChangeState(fi, ST_L2_3); | |
760 | } | |
761 | ||
762 | static void | |
763 | l2_mdl_assign(struct FsmInst *fi, int event, void *arg) | |
764 | { | |
765 | struct layer2 *l2 = fi->userdata; | |
766 | ||
767 | mISDN_FsmChangeState(fi, ST_L2_3); | |
768 | dev_kfree_skb((struct sk_buff *)arg); | |
769 | l2_tei(l2, MDL_ASSIGN_IND, 0); | |
770 | } | |
771 | ||
772 | static void | |
773 | l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg) | |
774 | { | |
775 | struct layer2 *l2 = fi->userdata; | |
776 | struct sk_buff *skb = arg; | |
777 | ||
778 | skb_queue_tail(&l2->ui_queue, skb); | |
779 | mISDN_FsmChangeState(fi, ST_L2_2); | |
780 | l2_tei(l2, MDL_ASSIGN_IND, 0); | |
781 | } | |
782 | ||
783 | static void | |
784 | l2_queue_ui(struct FsmInst *fi, int event, void *arg) | |
785 | { | |
786 | struct layer2 *l2 = fi->userdata; | |
787 | struct sk_buff *skb = arg; | |
788 | ||
789 | skb_queue_tail(&l2->ui_queue, skb); | |
790 | } | |
791 | ||
792 | static void | |
793 | tx_ui(struct layer2 *l2) | |
794 | { | |
795 | struct sk_buff *skb; | |
796 | u_char header[MAX_L2HEADER_LEN]; | |
797 | int i; | |
798 | ||
799 | i = sethdraddr(l2, header, CMD); | |
800 | if (test_bit(FLG_LAPD_NET, &l2->flag)) | |
801 | header[1] = 0xff; /* tei 127 */ | |
802 | header[i++] = UI; | |
803 | while ((skb = skb_dequeue(&l2->ui_queue))) { | |
804 | memcpy(skb_push(skb, i), header, i); | |
805 | enqueue_ui(l2, skb); | |
806 | } | |
807 | } | |
808 | ||
809 | static void | |
810 | l2_send_ui(struct FsmInst *fi, int event, void *arg) | |
811 | { | |
812 | struct layer2 *l2 = fi->userdata; | |
813 | struct sk_buff *skb = arg; | |
814 | ||
815 | skb_queue_tail(&l2->ui_queue, skb); | |
816 | tx_ui(l2); | |
817 | } | |
818 | ||
819 | static void | |
820 | l2_got_ui(struct FsmInst *fi, int event, void *arg) | |
821 | { | |
822 | struct layer2 *l2 = fi->userdata; | |
823 | struct sk_buff *skb = arg; | |
824 | ||
825 | skb_pull(skb, l2headersize(l2, 1)); | |
826 | /* | |
827 | * in states 1-3 for broadcast | |
828 | */ | |
829 | ||
830 | if (l2->tm) | |
831 | l2_tei(l2, MDL_STATUS_UI_IND, 0); | |
832 | l2up(l2, DL_UNITDATA_IND, skb); | |
833 | } | |
834 | ||
835 | static void | |
836 | l2_establish(struct FsmInst *fi, int event, void *arg) | |
837 | { | |
838 | struct sk_buff *skb = arg; | |
839 | struct layer2 *l2 = fi->userdata; | |
840 | ||
841 | establishlink(fi); | |
842 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
843 | dev_kfree_skb(skb); | |
844 | } | |
845 | ||
846 | static void | |
847 | l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg) | |
848 | { | |
849 | struct sk_buff *skb = arg; | |
850 | struct layer2 *l2 = fi->userdata; | |
851 | ||
852 | skb_queue_purge(&l2->i_queue); | |
853 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
854 | test_and_clear_bit(FLG_PEND_REL, &l2->flag); | |
855 | dev_kfree_skb(skb); | |
856 | } | |
857 | ||
858 | static void | |
859 | l2_l3_reestablish(struct FsmInst *fi, int event, void *arg) | |
860 | { | |
861 | struct sk_buff *skb = arg; | |
862 | struct layer2 *l2 = fi->userdata; | |
863 | ||
864 | skb_queue_purge(&l2->i_queue); | |
865 | establishlink(fi); | |
866 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
867 | dev_kfree_skb(skb); | |
868 | } | |
869 | ||
870 | static void | |
871 | l2_release(struct FsmInst *fi, int event, void *arg) | |
872 | { | |
873 | struct layer2 *l2 = fi->userdata; | |
874 | struct sk_buff *skb = arg; | |
875 | ||
876 | skb_trim(skb, 0); | |
877 | l2up(l2, DL_RELEASE_CNF, skb); | |
878 | } | |
879 | ||
880 | static void | |
881 | l2_pend_rel(struct FsmInst *fi, int event, void *arg) | |
882 | { | |
883 | struct sk_buff *skb = arg; | |
884 | struct layer2 *l2 = fi->userdata; | |
885 | ||
886 | test_and_set_bit(FLG_PEND_REL, &l2->flag); | |
887 | dev_kfree_skb(skb); | |
888 | } | |
889 | ||
890 | static void | |
891 | l2_disconnect(struct FsmInst *fi, int event, void *arg) | |
892 | { | |
893 | struct layer2 *l2 = fi->userdata; | |
894 | struct sk_buff *skb = arg; | |
895 | ||
896 | skb_queue_purge(&l2->i_queue); | |
897 | freewin(l2); | |
898 | mISDN_FsmChangeState(fi, ST_L2_6); | |
899 | l2->rc = 0; | |
900 | send_uframe(l2, NULL, DISC | 0x10, CMD); | |
901 | mISDN_FsmDelTimer(&l2->t203, 1); | |
902 | restart_t200(l2, 2); | |
0f817a5e | 903 | dev_kfree_skb(skb); |
1b2b03f8 KK |
904 | } |
905 | ||
906 | static void | |
907 | l2_start_multi(struct FsmInst *fi, int event, void *arg) | |
908 | { | |
909 | struct layer2 *l2 = fi->userdata; | |
910 | struct sk_buff *skb = arg; | |
911 | ||
912 | l2->vs = 0; | |
913 | l2->va = 0; | |
914 | l2->vr = 0; | |
915 | l2->sow = 0; | |
916 | clear_exception(l2); | |
917 | send_uframe(l2, NULL, UA | get_PollFlag(l2, skb), RSP); | |
918 | mISDN_FsmChangeState(fi, ST_L2_7); | |
919 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 3); | |
920 | skb_trim(skb, 0); | |
921 | l2up(l2, DL_ESTABLISH_IND, skb); | |
922 | if (l2->tm) | |
923 | l2_tei(l2, MDL_STATUS_UP_IND, 0); | |
924 | } | |
925 | ||
926 | static void | |
927 | l2_send_UA(struct FsmInst *fi, int event, void *arg) | |
928 | { | |
929 | struct layer2 *l2 = fi->userdata; | |
930 | struct sk_buff *skb = arg; | |
931 | ||
932 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); | |
933 | } | |
934 | ||
935 | static void | |
936 | l2_send_DM(struct FsmInst *fi, int event, void *arg) | |
937 | { | |
938 | struct layer2 *l2 = fi->userdata; | |
939 | struct sk_buff *skb = arg; | |
940 | ||
941 | send_uframe(l2, skb, DM | get_PollFlag(l2, skb), RSP); | |
942 | } | |
943 | ||
944 | static void | |
945 | l2_restart_multi(struct FsmInst *fi, int event, void *arg) | |
946 | { | |
947 | struct layer2 *l2 = fi->userdata; | |
948 | struct sk_buff *skb = arg; | |
949 | int est = 0; | |
950 | ||
951 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); | |
952 | ||
953 | l2mgr(l2, MDL_ERROR_IND, (void *) 'F'); | |
954 | ||
955 | if (l2->vs != l2->va) { | |
956 | skb_queue_purge(&l2->i_queue); | |
957 | est = 1; | |
958 | } | |
959 | ||
960 | clear_exception(l2); | |
961 | l2->vs = 0; | |
962 | l2->va = 0; | |
963 | l2->vr = 0; | |
964 | l2->sow = 0; | |
965 | mISDN_FsmChangeState(fi, ST_L2_7); | |
966 | stop_t200(l2, 3); | |
967 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 3); | |
968 | ||
969 | if (est) | |
970 | l2up_create(l2, DL_ESTABLISH_IND, 0, NULL); | |
971 | /* mISDN_queue_data(&l2->inst, l2->inst.id | MSG_BROADCAST, | |
972 | * MGR_SHORTSTATUS | INDICATION, SSTATUS_L2_ESTABLISHED, | |
973 | * 0, NULL, 0); | |
974 | */ | |
975 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) | |
976 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
977 | } | |
978 | ||
979 | static void | |
980 | l2_stop_multi(struct FsmInst *fi, int event, void *arg) | |
981 | { | |
982 | struct layer2 *l2 = fi->userdata; | |
983 | struct sk_buff *skb = arg; | |
984 | ||
985 | mISDN_FsmChangeState(fi, ST_L2_4); | |
986 | mISDN_FsmDelTimer(&l2->t203, 3); | |
987 | stop_t200(l2, 4); | |
988 | ||
989 | send_uframe(l2, skb, UA | get_PollFlag(l2, skb), RSP); | |
990 | skb_queue_purge(&l2->i_queue); | |
991 | freewin(l2); | |
992 | lapb_dl_release_l2l3(l2, DL_RELEASE_IND); | |
993 | if (l2->tm) | |
994 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
995 | } | |
996 | ||
997 | static void | |
998 | l2_connected(struct FsmInst *fi, int event, void *arg) | |
999 | { | |
1000 | struct layer2 *l2 = fi->userdata; | |
1001 | struct sk_buff *skb = arg; | |
1002 | int pr = -1; | |
1003 | ||
1004 | if (!get_PollFlag(l2, skb)) { | |
1005 | l2_mdl_error_ua(fi, event, arg); | |
1006 | return; | |
1007 | } | |
1008 | dev_kfree_skb(skb); | |
1009 | if (test_and_clear_bit(FLG_PEND_REL, &l2->flag)) | |
1010 | l2_disconnect(fi, event, NULL); | |
1011 | if (test_and_clear_bit(FLG_L3_INIT, &l2->flag)) { | |
1012 | pr = DL_ESTABLISH_CNF; | |
1013 | } else if (l2->vs != l2->va) { | |
1014 | skb_queue_purge(&l2->i_queue); | |
1015 | pr = DL_ESTABLISH_IND; | |
1016 | } | |
1017 | stop_t200(l2, 5); | |
1018 | l2->vr = 0; | |
1019 | l2->vs = 0; | |
1020 | l2->va = 0; | |
1021 | l2->sow = 0; | |
1022 | mISDN_FsmChangeState(fi, ST_L2_7); | |
1023 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 4); | |
1024 | if (pr != -1) | |
1025 | l2up_create(l2, pr, 0, NULL); | |
1026 | ||
1027 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) | |
1028 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1029 | ||
1030 | if (l2->tm) | |
1031 | l2_tei(l2, MDL_STATUS_UP_IND, 0); | |
1032 | } | |
1033 | ||
1034 | static void | |
1035 | l2_released(struct FsmInst *fi, int event, void *arg) | |
1036 | { | |
1037 | struct layer2 *l2 = fi->userdata; | |
1038 | struct sk_buff *skb = arg; | |
1039 | ||
1040 | if (!get_PollFlag(l2, skb)) { | |
1041 | l2_mdl_error_ua(fi, event, arg); | |
1042 | return; | |
1043 | } | |
1044 | dev_kfree_skb(skb); | |
1045 | stop_t200(l2, 6); | |
1046 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); | |
1047 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1048 | if (l2->tm) | |
1049 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1050 | } | |
1051 | ||
1052 | static void | |
1053 | l2_reestablish(struct FsmInst *fi, int event, void *arg) | |
1054 | { | |
1055 | struct layer2 *l2 = fi->userdata; | |
1056 | struct sk_buff *skb = arg; | |
1057 | ||
1058 | if (!get_PollFlagFree(l2, skb)) { | |
1059 | establishlink(fi); | |
1060 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | static void | |
1065 | l2_st5_dm_release(struct FsmInst *fi, int event, void *arg) | |
1066 | { | |
1067 | struct layer2 *l2 = fi->userdata; | |
1068 | struct sk_buff *skb = arg; | |
1069 | ||
1070 | if (get_PollFlagFree(l2, skb)) { | |
1071 | stop_t200(l2, 7); | |
1072 | if (!test_bit(FLG_L3_INIT, &l2->flag)) | |
1073 | skb_queue_purge(&l2->i_queue); | |
1074 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1075 | l2down_create(l2, PH_DEACTIVATE_REQ, | |
475be4d8 | 1076 | l2_newid(l2), 0, NULL); |
1b2b03f8 KK |
1077 | st5_dl_release_l2l3(l2); |
1078 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1079 | if (l2->tm) | |
1080 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1081 | } | |
1082 | } | |
1083 | ||
1084 | static void | |
1085 | l2_st6_dm_release(struct FsmInst *fi, int event, void *arg) | |
1086 | { | |
1087 | struct layer2 *l2 = fi->userdata; | |
1088 | struct sk_buff *skb = arg; | |
1089 | ||
1090 | if (get_PollFlagFree(l2, skb)) { | |
1091 | stop_t200(l2, 8); | |
1092 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); | |
1093 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1094 | if (l2->tm) | |
1095 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1096 | } | |
1097 | } | |
1098 | ||
5b834354 | 1099 | static void |
1b2b03f8 KK |
1100 | enquiry_cr(struct layer2 *l2, u_char typ, u_char cr, u_char pf) |
1101 | { | |
1102 | struct sk_buff *skb; | |
1103 | u_char tmp[MAX_L2HEADER_LEN]; | |
1104 | int i; | |
1105 | ||
1106 | i = sethdraddr(l2, tmp, cr); | |
1107 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1108 | tmp[i++] = typ; | |
1109 | tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0); | |
1110 | } else | |
1111 | tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0); | |
1112 | skb = mI_alloc_skb(i, GFP_ATOMIC); | |
1113 | if (!skb) { | |
f45ebf3a KK |
1114 | printk(KERN_WARNING "%s: isdnl2 can't alloc sbbuff in %s\n", |
1115 | mISDNDevName4ch(&l2->ch), __func__); | |
1b2b03f8 KK |
1116 | return; |
1117 | } | |
59ae1d12 | 1118 | skb_put_data(skb, tmp, i); |
1b2b03f8 KK |
1119 | enqueue_super(l2, skb); |
1120 | } | |
1121 | ||
1122 | inline void | |
1123 | enquiry_response(struct layer2 *l2) | |
1124 | { | |
1125 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) | |
1126 | enquiry_cr(l2, RNR, RSP, 1); | |
1127 | else | |
1128 | enquiry_cr(l2, RR, RSP, 1); | |
1129 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1130 | } | |
1131 | ||
1132 | inline void | |
1133 | transmit_enquiry(struct layer2 *l2) | |
1134 | { | |
1135 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) | |
1136 | enquiry_cr(l2, RNR, CMD, 1); | |
1137 | else | |
1138 | enquiry_cr(l2, RR, CMD, 1); | |
1139 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1140 | start_t200(l2, 9); | |
1141 | } | |
1142 | ||
1143 | ||
1144 | static void | |
1145 | nrerrorrecovery(struct FsmInst *fi) | |
1146 | { | |
1147 | struct layer2 *l2 = fi->userdata; | |
1148 | ||
1149 | l2mgr(l2, MDL_ERROR_IND, (void *) 'J'); | |
1150 | establishlink(fi); | |
1151 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1152 | } | |
1153 | ||
1154 | static void | |
1155 | invoke_retransmission(struct layer2 *l2, unsigned int nr) | |
1156 | { | |
1157 | u_int p1; | |
1158 | ||
1159 | if (l2->vs != nr) { | |
1160 | while (l2->vs != nr) { | |
1161 | (l2->vs)--; | |
1162 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1163 | l2->vs %= 128; | |
1164 | p1 = (l2->vs - l2->va) % 128; | |
1165 | } else { | |
1166 | l2->vs %= 8; | |
1167 | p1 = (l2->vs - l2->va) % 8; | |
1168 | } | |
1169 | p1 = (p1 + l2->sow) % l2->window; | |
1170 | if (l2->windowar[p1]) | |
1171 | skb_queue_head(&l2->i_queue, l2->windowar[p1]); | |
1172 | else | |
1173 | printk(KERN_WARNING | |
475be4d8 | 1174 | "%s: windowar[%d] is NULL\n", |
f45ebf3a | 1175 | mISDNDevName4ch(&l2->ch), p1); |
1b2b03f8 KK |
1176 | l2->windowar[p1] = NULL; |
1177 | } | |
1178 | mISDN_FsmEvent(&l2->l2m, EV_L2_ACK_PULL, NULL); | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | static void | |
1183 | l2_st7_got_super(struct FsmInst *fi, int event, void *arg) | |
1184 | { | |
1185 | struct layer2 *l2 = fi->userdata; | |
1186 | struct sk_buff *skb = arg; | |
1187 | int PollFlag, rsp, typ = RR; | |
1188 | unsigned int nr; | |
1189 | ||
1190 | rsp = *skb->data & 0x2; | |
1191 | if (test_bit(FLG_ORIG, &l2->flag)) | |
1192 | rsp = !rsp; | |
1193 | ||
1194 | skb_pull(skb, l2addrsize(l2)); | |
1195 | if (IsRNR(skb->data, l2)) { | |
1196 | set_peer_busy(l2); | |
1197 | typ = RNR; | |
1198 | } else | |
1199 | clear_peer_busy(l2); | |
1200 | if (IsREJ(skb->data, l2)) | |
1201 | typ = REJ; | |
1202 | ||
1203 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1204 | PollFlag = (skb->data[1] & 0x1) == 0x1; | |
1205 | nr = skb->data[1] >> 1; | |
1206 | } else { | |
1207 | PollFlag = (skb->data[0] & 0x10); | |
1208 | nr = (skb->data[0] >> 5) & 0x7; | |
1209 | } | |
1210 | dev_kfree_skb(skb); | |
1211 | ||
1212 | if (PollFlag) { | |
1213 | if (rsp) | |
1214 | l2mgr(l2, MDL_ERROR_IND, (void *) 'A'); | |
1215 | else | |
1216 | enquiry_response(l2); | |
1217 | } | |
1218 | if (legalnr(l2, nr)) { | |
1219 | if (typ == REJ) { | |
1220 | setva(l2, nr); | |
1221 | invoke_retransmission(l2, nr); | |
1222 | stop_t200(l2, 10); | |
1223 | if (mISDN_FsmAddTimer(&l2->t203, l2->T203, | |
475be4d8 | 1224 | EV_L2_T203, NULL, 6)) |
1b2b03f8 KK |
1225 | l2m_debug(&l2->l2m, "Restart T203 ST7 REJ"); |
1226 | } else if ((nr == l2->vs) && (typ == RR)) { | |
1227 | setva(l2, nr); | |
1228 | stop_t200(l2, 11); | |
1229 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, | |
475be4d8 | 1230 | EV_L2_T203, NULL, 7); |
1b2b03f8 KK |
1231 | } else if ((l2->va != nr) || (typ == RNR)) { |
1232 | setva(l2, nr); | |
1233 | if (typ != RR) | |
1234 | mISDN_FsmDelTimer(&l2->t203, 9); | |
1235 | restart_t200(l2, 12); | |
1236 | } | |
1237 | if (skb_queue_len(&l2->i_queue) && (typ == RR)) | |
1238 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1239 | } else | |
1240 | nrerrorrecovery(fi); | |
1241 | } | |
1242 | ||
1243 | static void | |
1244 | l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg) | |
1245 | { | |
1246 | struct layer2 *l2 = fi->userdata; | |
1247 | struct sk_buff *skb = arg; | |
1248 | ||
1249 | if (!test_bit(FLG_L3_INIT, &l2->flag)) | |
1250 | skb_queue_tail(&l2->i_queue, skb); | |
1251 | else | |
1252 | dev_kfree_skb(skb); | |
1253 | } | |
1254 | ||
1255 | static void | |
1256 | l2_feed_i_pull(struct FsmInst *fi, int event, void *arg) | |
1257 | { | |
1258 | struct layer2 *l2 = fi->userdata; | |
1259 | struct sk_buff *skb = arg; | |
1260 | ||
1261 | skb_queue_tail(&l2->i_queue, skb); | |
1262 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1263 | } | |
1264 | ||
1265 | static void | |
1266 | l2_feed_iqueue(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 | } | |
1273 | ||
1274 | static void | |
1275 | l2_got_iframe(struct FsmInst *fi, int event, void *arg) | |
1276 | { | |
1277 | struct layer2 *l2 = fi->userdata; | |
1278 | struct sk_buff *skb = arg; | |
1279 | int PollFlag, i; | |
1280 | u_int ns, nr; | |
1281 | ||
1282 | i = l2addrsize(l2); | |
1283 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1284 | PollFlag = ((skb->data[i + 1] & 0x1) == 0x1); | |
1285 | ns = skb->data[i] >> 1; | |
1286 | nr = (skb->data[i + 1] >> 1) & 0x7f; | |
1287 | } else { | |
1288 | PollFlag = (skb->data[i] & 0x10); | |
1289 | ns = (skb->data[i] >> 1) & 0x7; | |
1290 | nr = (skb->data[i] >> 5) & 0x7; | |
1291 | } | |
1292 | if (test_bit(FLG_OWN_BUSY, &l2->flag)) { | |
1293 | dev_kfree_skb(skb); | |
1294 | if (PollFlag) | |
1295 | enquiry_response(l2); | |
1296 | } else { | |
1297 | if (l2->vr == ns) { | |
1298 | l2->vr++; | |
1299 | if (test_bit(FLG_MOD128, &l2->flag)) | |
1300 | l2->vr %= 128; | |
1301 | else | |
1302 | l2->vr %= 8; | |
1303 | test_and_clear_bit(FLG_REJEXC, &l2->flag); | |
1304 | if (PollFlag) | |
1305 | enquiry_response(l2); | |
1306 | else | |
1307 | test_and_set_bit(FLG_ACK_PEND, &l2->flag); | |
1308 | skb_pull(skb, l2headersize(l2, 0)); | |
1309 | l2up(l2, DL_DATA_IND, skb); | |
1310 | } else { | |
1311 | /* n(s)!=v(r) */ | |
1312 | dev_kfree_skb(skb); | |
1313 | if (test_and_set_bit(FLG_REJEXC, &l2->flag)) { | |
1314 | if (PollFlag) | |
1315 | enquiry_response(l2); | |
1316 | } else { | |
1317 | enquiry_cr(l2, REJ, RSP, PollFlag); | |
1318 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1319 | } | |
1320 | } | |
1321 | } | |
1322 | if (legalnr(l2, nr)) { | |
1323 | if (!test_bit(FLG_PEER_BUSY, &l2->flag) && | |
1324 | (fi->state == ST_L2_7)) { | |
1325 | if (nr == l2->vs) { | |
1326 | stop_t200(l2, 13); | |
1327 | mISDN_FsmRestartTimer(&l2->t203, l2->T203, | |
475be4d8 | 1328 | EV_L2_T203, NULL, 7); |
1b2b03f8 KK |
1329 | } else if (nr != l2->va) |
1330 | restart_t200(l2, 14); | |
1331 | } | |
1332 | setva(l2, nr); | |
1333 | } else { | |
1334 | nrerrorrecovery(fi); | |
1335 | return; | |
1336 | } | |
1337 | if (skb_queue_len(&l2->i_queue) && (fi->state == ST_L2_7)) | |
1338 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1339 | if (test_and_clear_bit(FLG_ACK_PEND, &l2->flag)) | |
1340 | enquiry_cr(l2, RR, RSP, 0); | |
1341 | } | |
1342 | ||
1343 | static void | |
1344 | l2_got_tei(struct FsmInst *fi, int event, void *arg) | |
1345 | { | |
1346 | struct layer2 *l2 = fi->userdata; | |
1347 | u_int info; | |
1348 | ||
1349 | l2->tei = (signed char)(long)arg; | |
1350 | set_channel_address(&l2->ch, l2->sapi, l2->tei); | |
1351 | info = DL_INFO_L2_CONNECT; | |
1352 | l2up_create(l2, DL_INFORMATION_IND, sizeof(info), &info); | |
1353 | if (fi->state == ST_L2_3) { | |
1354 | establishlink(fi); | |
1355 | test_and_set_bit(FLG_L3_INIT, &l2->flag); | |
1356 | } else | |
1357 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1358 | if (skb_queue_len(&l2->ui_queue)) | |
1359 | tx_ui(l2); | |
1360 | } | |
1361 | ||
1362 | static void | |
1363 | l2_st5_tout_200(struct FsmInst *fi, int event, void *arg) | |
1364 | { | |
1365 | struct layer2 *l2 = fi->userdata; | |
1366 | ||
1367 | if (test_bit(FLG_LAPD, &l2->flag) && | |
475be4d8 | 1368 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
1b2b03f8 KK |
1369 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
1370 | } else if (l2->rc == l2->N200) { | |
1371 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1372 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1373 | skb_queue_purge(&l2->i_queue); | |
1374 | l2mgr(l2, MDL_ERROR_IND, (void *) 'G'); | |
1375 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1376 | l2down_create(l2, PH_DEACTIVATE_REQ, | |
475be4d8 | 1377 | l2_newid(l2), 0, NULL); |
1b2b03f8 KK |
1378 | st5_dl_release_l2l3(l2); |
1379 | if (l2->tm) | |
1380 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1381 | } else { | |
1382 | l2->rc++; | |
1383 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); | |
1384 | send_uframe(l2, NULL, (test_bit(FLG_MOD128, &l2->flag) ? | |
475be4d8 | 1385 | SABME : SABM) | 0x10, CMD); |
1b2b03f8 KK |
1386 | } |
1387 | } | |
1388 | ||
1389 | static void | |
1390 | l2_st6_tout_200(struct FsmInst *fi, int event, void *arg) | |
1391 | { | |
1392 | struct layer2 *l2 = fi->userdata; | |
1393 | ||
1394 | if (test_bit(FLG_LAPD, &l2->flag) && | |
475be4d8 | 1395 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
1b2b03f8 KK |
1396 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
1397 | } else if (l2->rc == l2->N200) { | |
1398 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1399 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1400 | l2mgr(l2, MDL_ERROR_IND, (void *) 'H'); | |
1401 | lapb_dl_release_l2l3(l2, DL_RELEASE_CNF); | |
1402 | if (l2->tm) | |
1403 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1404 | } else { | |
1405 | l2->rc++; | |
1406 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, | |
475be4d8 | 1407 | NULL, 9); |
1b2b03f8 KK |
1408 | send_uframe(l2, NULL, DISC | 0x10, CMD); |
1409 | } | |
1410 | } | |
1411 | ||
1412 | static void | |
1413 | l2_st7_tout_200(struct FsmInst *fi, int event, void *arg) | |
1414 | { | |
1415 | struct layer2 *l2 = fi->userdata; | |
1416 | ||
1417 | if (test_bit(FLG_LAPD, &l2->flag) && | |
475be4d8 | 1418 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
1b2b03f8 KK |
1419 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
1420 | return; | |
1421 | } | |
1422 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1423 | l2->rc = 0; | |
1424 | mISDN_FsmChangeState(fi, ST_L2_8); | |
1425 | transmit_enquiry(l2); | |
1426 | l2->rc++; | |
1427 | } | |
1428 | ||
1429 | static void | |
1430 | l2_st8_tout_200(struct FsmInst *fi, int event, void *arg) | |
1431 | { | |
1432 | struct layer2 *l2 = fi->userdata; | |
1433 | ||
1434 | if (test_bit(FLG_LAPD, &l2->flag) && | |
475be4d8 | 1435 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
1b2b03f8 KK |
1436 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 9); |
1437 | return; | |
1438 | } | |
1439 | test_and_clear_bit(FLG_T200_RUN, &l2->flag); | |
1440 | if (l2->rc == l2->N200) { | |
1441 | l2mgr(l2, MDL_ERROR_IND, (void *) 'I'); | |
1442 | establishlink(fi); | |
1443 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1444 | } else { | |
1445 | transmit_enquiry(l2); | |
1446 | l2->rc++; | |
1447 | } | |
1448 | } | |
1449 | ||
1450 | static void | |
1451 | l2_st7_tout_203(struct FsmInst *fi, int event, void *arg) | |
1452 | { | |
1453 | struct layer2 *l2 = fi->userdata; | |
1454 | ||
1455 | if (test_bit(FLG_LAPD, &l2->flag) && | |
475be4d8 | 1456 | test_bit(FLG_DCHAN_BUSY, &l2->flag)) { |
1b2b03f8 KK |
1457 | mISDN_FsmAddTimer(&l2->t203, l2->T203, EV_L2_T203, NULL, 9); |
1458 | return; | |
1459 | } | |
1460 | mISDN_FsmChangeState(fi, ST_L2_8); | |
1461 | transmit_enquiry(l2); | |
1462 | l2->rc = 0; | |
1463 | } | |
1464 | ||
1465 | static void | |
1466 | l2_pull_iqueue(struct FsmInst *fi, int event, void *arg) | |
1467 | { | |
1468 | struct layer2 *l2 = fi->userdata; | |
c96356a9 | 1469 | struct sk_buff *skb, *nskb; |
1b2b03f8 KK |
1470 | u_char header[MAX_L2HEADER_LEN]; |
1471 | u_int i, p1; | |
1472 | ||
1473 | if (!cansend(l2)) | |
1474 | return; | |
1475 | ||
1476 | skb = skb_dequeue(&l2->i_queue); | |
1477 | if (!skb) | |
1478 | return; | |
1b2b03f8 KK |
1479 | i = sethdraddr(l2, header, CMD); |
1480 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1481 | header[i++] = l2->vs << 1; | |
1482 | header[i++] = l2->vr << 1; | |
c96356a9 KK |
1483 | } else |
1484 | header[i++] = (l2->vr << 5) | (l2->vs << 1); | |
1485 | nskb = skb_realloc_headroom(skb, i); | |
1486 | if (!nskb) { | |
1487 | printk(KERN_WARNING "%s: no headroom(%d) copy for IFrame\n", | |
1488 | mISDNDevName4ch(&l2->ch), i); | |
1489 | skb_queue_head(&l2->i_queue, skb); | |
1490 | return; | |
1491 | } | |
1492 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1493 | p1 = (l2->vs - l2->va) % 128; | |
1b2b03f8 KK |
1494 | l2->vs = (l2->vs + 1) % 128; |
1495 | } else { | |
c96356a9 | 1496 | p1 = (l2->vs - l2->va) % 8; |
1b2b03f8 KK |
1497 | l2->vs = (l2->vs + 1) % 8; |
1498 | } | |
c96356a9 KK |
1499 | p1 = (p1 + l2->sow) % l2->window; |
1500 | if (l2->windowar[p1]) { | |
1501 | printk(KERN_WARNING "%s: l2 try overwrite ack queue entry %d\n", | |
1502 | mISDNDevName4ch(&l2->ch), p1); | |
1503 | dev_kfree_skb(l2->windowar[p1]); | |
1b2b03f8 | 1504 | } |
c96356a9 KK |
1505 | l2->windowar[p1] = skb; |
1506 | memcpy(skb_push(nskb, i), header, i); | |
1b2b03f8 KK |
1507 | l2down(l2, PH_DATA_REQ, l2_newid(l2), nskb); |
1508 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1509 | if (!test_and_set_bit(FLG_T200_RUN, &l2->flag)) { | |
1510 | mISDN_FsmDelTimer(&l2->t203, 13); | |
1511 | mISDN_FsmAddTimer(&l2->t200, l2->T200, EV_L2_T200, NULL, 11); | |
1512 | } | |
1513 | } | |
1514 | ||
1515 | static void | |
1516 | l2_st8_got_super(struct FsmInst *fi, int event, void *arg) | |
1517 | { | |
1518 | struct layer2 *l2 = fi->userdata; | |
1519 | struct sk_buff *skb = arg; | |
1520 | int PollFlag, rsp, rnr = 0; | |
1521 | unsigned int nr; | |
1522 | ||
1523 | rsp = *skb->data & 0x2; | |
1524 | if (test_bit(FLG_ORIG, &l2->flag)) | |
1525 | rsp = !rsp; | |
1526 | ||
1527 | skb_pull(skb, l2addrsize(l2)); | |
1528 | ||
1529 | if (IsRNR(skb->data, l2)) { | |
1530 | set_peer_busy(l2); | |
1531 | rnr = 1; | |
1532 | } else | |
1533 | clear_peer_busy(l2); | |
1534 | ||
1535 | if (test_bit(FLG_MOD128, &l2->flag)) { | |
1536 | PollFlag = (skb->data[1] & 0x1) == 0x1; | |
1537 | nr = skb->data[1] >> 1; | |
1538 | } else { | |
1539 | PollFlag = (skb->data[0] & 0x10); | |
1540 | nr = (skb->data[0] >> 5) & 0x7; | |
1541 | } | |
1542 | dev_kfree_skb(skb); | |
1543 | if (rsp && PollFlag) { | |
1544 | if (legalnr(l2, nr)) { | |
1545 | if (rnr) { | |
1546 | restart_t200(l2, 15); | |
1547 | } else { | |
1548 | stop_t200(l2, 16); | |
1549 | mISDN_FsmAddTimer(&l2->t203, l2->T203, | |
475be4d8 | 1550 | EV_L2_T203, NULL, 5); |
1b2b03f8 KK |
1551 | setva(l2, nr); |
1552 | } | |
1553 | invoke_retransmission(l2, nr); | |
1554 | mISDN_FsmChangeState(fi, ST_L2_7); | |
1555 | if (skb_queue_len(&l2->i_queue) && cansend(l2)) | |
1556 | mISDN_FsmEvent(fi, EV_L2_ACK_PULL, NULL); | |
1557 | } else | |
1558 | nrerrorrecovery(fi); | |
1559 | } else { | |
1560 | if (!rsp && PollFlag) | |
1561 | enquiry_response(l2); | |
1562 | if (legalnr(l2, nr)) | |
1563 | setva(l2, nr); | |
1564 | else | |
1565 | nrerrorrecovery(fi); | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | static void | |
1570 | l2_got_FRMR(struct FsmInst *fi, int event, void *arg) | |
1571 | { | |
1572 | struct layer2 *l2 = fi->userdata; | |
1573 | struct sk_buff *skb = arg; | |
1574 | ||
1575 | skb_pull(skb, l2addrsize(l2) + 1); | |
1576 | ||
1577 | if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */ | |
1578 | (IsUA(skb->data) && (fi->state == ST_L2_7))) { | |
1579 | l2mgr(l2, MDL_ERROR_IND, (void *) 'K'); | |
1580 | establishlink(fi); | |
1581 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1582 | } | |
1583 | dev_kfree_skb(skb); | |
1584 | } | |
1585 | ||
1586 | static void | |
1587 | l2_st24_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 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1594 | } | |
1595 | ||
1596 | static void | |
1597 | l2_st3_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 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); | |
1604 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1605 | } | |
1606 | ||
1607 | static void | |
1608 | l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1609 | { | |
1610 | struct layer2 *l2 = fi->userdata; | |
1611 | ||
1612 | skb_queue_purge(&l2->i_queue); | |
1613 | skb_queue_purge(&l2->ui_queue); | |
1614 | freewin(l2); | |
1615 | l2->tei = GROUP_TEI; | |
1616 | stop_t200(l2, 17); | |
1617 | st5_dl_release_l2l3(l2); | |
1618 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1619 | } | |
1620 | ||
1621 | static void | |
1622 | l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1623 | { | |
1624 | struct layer2 *l2 = fi->userdata; | |
1625 | ||
1626 | skb_queue_purge(&l2->ui_queue); | |
1627 | l2->tei = GROUP_TEI; | |
1628 | stop_t200(l2, 18); | |
1629 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); | |
1630 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1631 | } | |
1632 | ||
1633 | static void | |
1634 | l2_tei_remove(struct FsmInst *fi, int event, void *arg) | |
1635 | { | |
1636 | struct layer2 *l2 = fi->userdata; | |
1637 | ||
1638 | skb_queue_purge(&l2->i_queue); | |
1639 | skb_queue_purge(&l2->ui_queue); | |
1640 | freewin(l2); | |
1641 | l2->tei = GROUP_TEI; | |
1642 | stop_t200(l2, 17); | |
1643 | mISDN_FsmDelTimer(&l2->t203, 19); | |
1644 | l2up_create(l2, DL_RELEASE_IND, 0, NULL); | |
1645 | /* mISDN_queue_data(&l2->inst, l2->inst.id | MSG_BROADCAST, | |
1646 | * MGR_SHORTSTATUS_IND, SSTATUS_L2_RELEASED, | |
1647 | * 0, NULL, 0); | |
1648 | */ | |
1649 | mISDN_FsmChangeState(fi, ST_L2_1); | |
1650 | } | |
1651 | ||
1652 | static void | |
95b8fbad | 1653 | l2_st14_persistent_da(struct FsmInst *fi, int event, void *arg) |
1b2b03f8 KK |
1654 | { |
1655 | struct layer2 *l2 = fi->userdata; | |
1656 | struct sk_buff *skb = arg; | |
1657 | ||
1658 | skb_queue_purge(&l2->i_queue); | |
1659 | skb_queue_purge(&l2->ui_queue); | |
1660 | if (test_and_clear_bit(FLG_ESTAB_PEND, &l2->flag)) | |
1661 | l2up(l2, DL_RELEASE_IND, skb); | |
1662 | else | |
1663 | dev_kfree_skb(skb); | |
1664 | } | |
1665 | ||
1666 | static void | |
95b8fbad | 1667 | l2_st5_persistent_da(struct FsmInst *fi, int event, void *arg) |
1b2b03f8 KK |
1668 | { |
1669 | struct layer2 *l2 = fi->userdata; | |
1670 | struct sk_buff *skb = arg; | |
1671 | ||
1672 | skb_queue_purge(&l2->i_queue); | |
1673 | skb_queue_purge(&l2->ui_queue); | |
1674 | freewin(l2); | |
1675 | stop_t200(l2, 19); | |
1676 | st5_dl_release_l2l3(l2); | |
1677 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1678 | if (l2->tm) | |
1679 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1680 | dev_kfree_skb(skb); | |
1681 | } | |
1682 | ||
1683 | static void | |
95b8fbad | 1684 | l2_st6_persistent_da(struct FsmInst *fi, int event, void *arg) |
1b2b03f8 KK |
1685 | { |
1686 | struct layer2 *l2 = fi->userdata; | |
1687 | struct sk_buff *skb = arg; | |
1688 | ||
1689 | skb_queue_purge(&l2->ui_queue); | |
1690 | stop_t200(l2, 20); | |
1691 | l2up(l2, DL_RELEASE_CNF, skb); | |
1692 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1693 | if (l2->tm) | |
1694 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1695 | } | |
1696 | ||
1697 | static void | |
95b8fbad | 1698 | l2_persistent_da(struct FsmInst *fi, int event, void *arg) |
1b2b03f8 KK |
1699 | { |
1700 | struct layer2 *l2 = fi->userdata; | |
1701 | struct sk_buff *skb = arg; | |
1702 | ||
1703 | skb_queue_purge(&l2->i_queue); | |
1704 | skb_queue_purge(&l2->ui_queue); | |
1705 | freewin(l2); | |
1706 | stop_t200(l2, 19); | |
1707 | mISDN_FsmDelTimer(&l2->t203, 19); | |
1708 | l2up(l2, DL_RELEASE_IND, skb); | |
1709 | mISDN_FsmChangeState(fi, ST_L2_4); | |
1710 | if (l2->tm) | |
1711 | l2_tei(l2, MDL_STATUS_DOWN_IND, 0); | |
1712 | } | |
1713 | ||
1714 | static void | |
1715 | l2_set_own_busy(struct FsmInst *fi, int event, void *arg) | |
1716 | { | |
1717 | struct layer2 *l2 = fi->userdata; | |
1718 | struct sk_buff *skb = arg; | |
1719 | ||
1720 | if (!test_and_set_bit(FLG_OWN_BUSY, &l2->flag)) { | |
1721 | enquiry_cr(l2, RNR, RSP, 0); | |
1722 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1723 | } | |
0f817a5e | 1724 | dev_kfree_skb(skb); |
1b2b03f8 KK |
1725 | } |
1726 | ||
1727 | static void | |
1728 | l2_clear_own_busy(struct FsmInst *fi, int event, void *arg) | |
1729 | { | |
1730 | struct layer2 *l2 = fi->userdata; | |
1731 | struct sk_buff *skb = arg; | |
1732 | ||
1733 | if (!test_and_clear_bit(FLG_OWN_BUSY, &l2->flag)) { | |
1734 | enquiry_cr(l2, RR, RSP, 0); | |
1735 | test_and_clear_bit(FLG_ACK_PEND, &l2->flag); | |
1736 | } | |
0f817a5e | 1737 | dev_kfree_skb(skb); |
1b2b03f8 KK |
1738 | } |
1739 | ||
1740 | static void | |
1741 | l2_frame_error(struct FsmInst *fi, int event, void *arg) | |
1742 | { | |
1743 | struct layer2 *l2 = fi->userdata; | |
1744 | ||
1745 | l2mgr(l2, MDL_ERROR_IND, arg); | |
1746 | } | |
1747 | ||
1748 | static void | |
1749 | l2_frame_error_reest(struct FsmInst *fi, int event, void *arg) | |
1750 | { | |
1751 | struct layer2 *l2 = fi->userdata; | |
1752 | ||
1753 | l2mgr(l2, MDL_ERROR_IND, arg); | |
1754 | establishlink(fi); | |
1755 | test_and_clear_bit(FLG_L3_INIT, &l2->flag); | |
1756 | } | |
1757 | ||
1758 | static struct FsmNode L2FnList[] = | |
1759 | { | |
1760 | {ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign}, | |
1761 | {ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3}, | |
1762 | {ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish}, | |
1763 | {ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3}, | |
1764 | {ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, | |
1765 | {ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish}, | |
1766 | {ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release}, | |
1767 | {ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel}, | |
1768 | {ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect}, | |
1769 | {ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect}, | |
1770 | {ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest}, | |
1771 | {ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull}, | |
1772 | {ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue}, | |
1773 | {ST_L2_1, EV_L2_DL_UNITDATA, l2_queue_ui_assign}, | |
1774 | {ST_L2_2, EV_L2_DL_UNITDATA, l2_queue_ui}, | |
1775 | {ST_L2_3, EV_L2_DL_UNITDATA, l2_queue_ui}, | |
1776 | {ST_L2_4, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1777 | {ST_L2_5, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1778 | {ST_L2_6, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1779 | {ST_L2_7, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1780 | {ST_L2_8, EV_L2_DL_UNITDATA, l2_send_ui}, | |
1781 | {ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1782 | {ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1783 | {ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei}, | |
1784 | {ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove}, | |
1785 | {ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove}, | |
1786 | {ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove}, | |
1787 | {ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove}, | |
1788 | {ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove}, | |
1789 | {ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove}, | |
1790 | {ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove}, | |
1791 | {ST_L2_4, EV_L2_SABME, l2_start_multi}, | |
1792 | {ST_L2_5, EV_L2_SABME, l2_send_UA}, | |
1793 | {ST_L2_6, EV_L2_SABME, l2_send_DM}, | |
1794 | {ST_L2_7, EV_L2_SABME, l2_restart_multi}, | |
1795 | {ST_L2_8, EV_L2_SABME, l2_restart_multi}, | |
1796 | {ST_L2_4, EV_L2_DISC, l2_send_DM}, | |
1797 | {ST_L2_5, EV_L2_DISC, l2_send_DM}, | |
1798 | {ST_L2_6, EV_L2_DISC, l2_send_UA}, | |
1799 | {ST_L2_7, EV_L2_DISC, l2_stop_multi}, | |
1800 | {ST_L2_8, EV_L2_DISC, l2_stop_multi}, | |
1801 | {ST_L2_4, EV_L2_UA, l2_mdl_error_ua}, | |
1802 | {ST_L2_5, EV_L2_UA, l2_connected}, | |
1803 | {ST_L2_6, EV_L2_UA, l2_released}, | |
1804 | {ST_L2_7, EV_L2_UA, l2_mdl_error_ua}, | |
1805 | {ST_L2_8, EV_L2_UA, l2_mdl_error_ua}, | |
1806 | {ST_L2_4, EV_L2_DM, l2_reestablish}, | |
1807 | {ST_L2_5, EV_L2_DM, l2_st5_dm_release}, | |
1808 | {ST_L2_6, EV_L2_DM, l2_st6_dm_release}, | |
1809 | {ST_L2_7, EV_L2_DM, l2_mdl_error_dm}, | |
1810 | {ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm}, | |
1811 | {ST_L2_1, EV_L2_UI, l2_got_ui}, | |
1812 | {ST_L2_2, EV_L2_UI, l2_got_ui}, | |
1813 | {ST_L2_3, EV_L2_UI, l2_got_ui}, | |
1814 | {ST_L2_4, EV_L2_UI, l2_got_ui}, | |
1815 | {ST_L2_5, EV_L2_UI, l2_got_ui}, | |
1816 | {ST_L2_6, EV_L2_UI, l2_got_ui}, | |
1817 | {ST_L2_7, EV_L2_UI, l2_got_ui}, | |
1818 | {ST_L2_8, EV_L2_UI, l2_got_ui}, | |
1819 | {ST_L2_7, EV_L2_FRMR, l2_got_FRMR}, | |
1820 | {ST_L2_8, EV_L2_FRMR, l2_got_FRMR}, | |
1821 | {ST_L2_7, EV_L2_SUPER, l2_st7_got_super}, | |
1822 | {ST_L2_8, EV_L2_SUPER, l2_st8_got_super}, | |
1823 | {ST_L2_7, EV_L2_I, l2_got_iframe}, | |
1824 | {ST_L2_8, EV_L2_I, l2_got_iframe}, | |
8423e6b2 KK |
1825 | {ST_L2_5, EV_L2_T200, l2_timeout}, |
1826 | {ST_L2_6, EV_L2_T200, l2_timeout}, | |
1827 | {ST_L2_7, EV_L2_T200, l2_timeout}, | |
1828 | {ST_L2_8, EV_L2_T200, l2_timeout}, | |
1829 | {ST_L2_7, EV_L2_T203, l2_timeout}, | |
1830 | {ST_L2_5, EV_L2_T200I, l2_st5_tout_200}, | |
1831 | {ST_L2_6, EV_L2_T200I, l2_st6_tout_200}, | |
1832 | {ST_L2_7, EV_L2_T200I, l2_st7_tout_200}, | |
1833 | {ST_L2_8, EV_L2_T200I, l2_st8_tout_200}, | |
1834 | {ST_L2_7, EV_L2_T203I, l2_st7_tout_203}, | |
1b2b03f8 KK |
1835 | {ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue}, |
1836 | {ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, | |
1837 | {ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy}, | |
1838 | {ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, | |
1839 | {ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy}, | |
1840 | {ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1841 | {ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1842 | {ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error}, | |
1843 | {ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest}, | |
1844 | {ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest}, | |
95b8fbad | 1845 | {ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistent_da}, |
1b2b03f8 KK |
1846 | {ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove}, |
1847 | {ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove}, | |
95b8fbad JE |
1848 | {ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistent_da}, |
1849 | {ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistent_da}, | |
1850 | {ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistent_da}, | |
1851 | {ST_L2_7, EV_L1_DEACTIVATE, l2_persistent_da}, | |
1852 | {ST_L2_8, EV_L1_DEACTIVATE, l2_persistent_da}, | |
1b2b03f8 KK |
1853 | }; |
1854 | ||
1b2b03f8 KK |
1855 | static int |
1856 | ph_data_indication(struct layer2 *l2, struct mISDNhead *hh, struct sk_buff *skb) | |
1857 | { | |
1858 | u_char *datap = skb->data; | |
1859 | int ret = -EINVAL; | |
1860 | int psapi, ptei; | |
1861 | u_int l; | |
1862 | int c = 0; | |
1863 | ||
1864 | l = l2addrsize(l2); | |
1865 | if (skb->len <= l) { | |
1866 | mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *) 'N'); | |
1867 | return ret; | |
1868 | } | |
1869 | if (test_bit(FLG_LAPD, &l2->flag)) { /* Maybe not needed */ | |
1870 | psapi = *datap++; | |
1871 | ptei = *datap++; | |
1872 | if ((psapi & 1) || !(ptei & 1)) { | |
1873 | printk(KERN_WARNING | |
f45ebf3a KK |
1874 | "%s l2 D-channel frame wrong EA0/EA1\n", |
1875 | mISDNDevName4ch(&l2->ch)); | |
1b2b03f8 KK |
1876 | return ret; |
1877 | } | |
1878 | psapi >>= 2; | |
1879 | ptei >>= 1; | |
1880 | if (psapi != l2->sapi) { | |
25985edc | 1881 | /* not our business */ |
d796509a AE |
1882 | if (*debug & DEBUG_L2) |
1883 | printk(KERN_DEBUG "%s: sapi %d/%d mismatch\n", | |
f45ebf3a KK |
1884 | mISDNDevName4ch(&l2->ch), psapi, |
1885 | l2->sapi); | |
1b2b03f8 KK |
1886 | dev_kfree_skb(skb); |
1887 | return 0; | |
1888 | } | |
1889 | if ((ptei != l2->tei) && (ptei != GROUP_TEI)) { | |
25985edc | 1890 | /* not our business */ |
d796509a AE |
1891 | if (*debug & DEBUG_L2) |
1892 | printk(KERN_DEBUG "%s: tei %d/%d mismatch\n", | |
f45ebf3a | 1893 | mISDNDevName4ch(&l2->ch), ptei, l2->tei); |
1b2b03f8 KK |
1894 | dev_kfree_skb(skb); |
1895 | return 0; | |
1896 | } | |
1897 | } else | |
1898 | datap += l; | |
1899 | if (!(*datap & 1)) { /* I-Frame */ | |
1900 | c = iframe_error(l2, skb); | |
1901 | if (!c) | |
1902 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_I, skb); | |
1903 | } else if (IsSFrame(datap, l2)) { /* S-Frame */ | |
1904 | c = super_error(l2, skb); | |
1905 | if (!c) | |
1906 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_SUPER, skb); | |
1907 | } else if (IsUI(datap)) { | |
1908 | c = UI_error(l2, skb); | |
1909 | if (!c) | |
1910 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_UI, skb); | |
1911 | } else if (IsSABME(datap, l2)) { | |
1912 | c = unnum_error(l2, skb, CMD); | |
1913 | if (!c) | |
1914 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_SABME, skb); | |
1915 | } else if (IsUA(datap)) { | |
1916 | c = unnum_error(l2, skb, RSP); | |
1917 | if (!c) | |
1918 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_UA, skb); | |
1919 | } else if (IsDISC(datap)) { | |
1920 | c = unnum_error(l2, skb, CMD); | |
1921 | if (!c) | |
1922 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DISC, skb); | |
1923 | } else if (IsDM(datap)) { | |
1924 | c = unnum_error(l2, skb, RSP); | |
1925 | if (!c) | |
1926 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DM, skb); | |
1927 | } else if (IsFRMR(datap)) { | |
1928 | c = FRMR_error(l2, skb); | |
1929 | if (!c) | |
1930 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_FRMR, skb); | |
1931 | } else | |
1932 | c = 'L'; | |
1933 | if (c) { | |
f45ebf3a KK |
1934 | printk(KERN_WARNING "%s:l2 D-channel frame error %c\n", |
1935 | mISDNDevName4ch(&l2->ch), c); | |
1b2b03f8 KK |
1936 | mISDN_FsmEvent(&l2->l2m, EV_L2_FRAME_ERROR, (void *)(long)c); |
1937 | } | |
1938 | return ret; | |
1939 | } | |
1940 | ||
1941 | static int | |
1942 | l2_send(struct mISDNchannel *ch, struct sk_buff *skb) | |
1943 | { | |
1944 | struct layer2 *l2 = container_of(ch, struct layer2, ch); | |
1945 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
475be4d8 | 1946 | int ret = -EINVAL; |
1b2b03f8 KK |
1947 | |
1948 | if (*debug & DEBUG_L2_RECV) | |
f45ebf3a KK |
1949 | printk(KERN_DEBUG "%s: %s prim(%x) id(%x) sapi(%d) tei(%d)\n", |
1950 | __func__, mISDNDevName4ch(&l2->ch), hh->prim, hh->id, | |
1951 | l2->sapi, l2->tei); | |
8423e6b2 KK |
1952 | if (hh->prim == DL_INTERN_MSG) { |
1953 | struct mISDNhead *chh = hh + 1; /* saved copy */ | |
1954 | ||
1955 | *hh = *chh; | |
1956 | if (*debug & DEBUG_L2_RECV) | |
1957 | printk(KERN_DEBUG "%s: prim(%x) id(%x) internal msg\n", | |
f45ebf3a | 1958 | mISDNDevName4ch(&l2->ch), hh->prim, hh->id); |
8423e6b2 | 1959 | } |
1b2b03f8 KK |
1960 | switch (hh->prim) { |
1961 | case PH_DATA_IND: | |
1962 | ret = ph_data_indication(l2, hh, skb); | |
1963 | break; | |
1964 | case PH_DATA_CNF: | |
1965 | ret = ph_data_confirm(l2, hh, skb); | |
1966 | break; | |
1967 | case PH_ACTIVATE_IND: | |
1968 | test_and_set_bit(FLG_L1_ACTIV, &l2->flag); | |
1969 | l2up_create(l2, MPH_ACTIVATE_IND, 0, NULL); | |
1970 | if (test_and_clear_bit(FLG_ESTAB_PEND, &l2->flag)) | |
1971 | ret = mISDN_FsmEvent(&l2->l2m, | |
475be4d8 | 1972 | EV_L2_DL_ESTABLISH_REQ, skb); |
1b2b03f8 KK |
1973 | break; |
1974 | case PH_DEACTIVATE_IND: | |
1975 | test_and_clear_bit(FLG_L1_ACTIV, &l2->flag); | |
1976 | l2up_create(l2, MPH_DEACTIVATE_IND, 0, NULL); | |
1977 | ret = mISDN_FsmEvent(&l2->l2m, EV_L1_DEACTIVATE, skb); | |
1978 | break; | |
1979 | case MPH_INFORMATION_IND: | |
1980 | if (!l2->up) | |
1981 | break; | |
1982 | ret = l2->up->send(l2->up, skb); | |
1983 | break; | |
1984 | case DL_DATA_REQ: | |
1985 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_DATA, skb); | |
1986 | break; | |
1987 | case DL_UNITDATA_REQ: | |
1988 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_UNITDATA, skb); | |
1989 | break; | |
1990 | case DL_ESTABLISH_REQ: | |
1991 | if (test_bit(FLG_LAPB, &l2->flag)) | |
1992 | test_and_set_bit(FLG_ORIG, &l2->flag); | |
1993 | if (test_bit(FLG_L1_ACTIV, &l2->flag)) { | |
1994 | if (test_bit(FLG_LAPD, &l2->flag) || | |
475be4d8 | 1995 | test_bit(FLG_ORIG, &l2->flag)) |
1b2b03f8 | 1996 | ret = mISDN_FsmEvent(&l2->l2m, |
475be4d8 | 1997 | EV_L2_DL_ESTABLISH_REQ, skb); |
1b2b03f8 KK |
1998 | } else { |
1999 | if (test_bit(FLG_LAPD, &l2->flag) || | |
475be4d8 | 2000 | test_bit(FLG_ORIG, &l2->flag)) { |
1b2b03f8 | 2001 | test_and_set_bit(FLG_ESTAB_PEND, |
475be4d8 | 2002 | &l2->flag); |
1b2b03f8 KK |
2003 | } |
2004 | ret = l2down(l2, PH_ACTIVATE_REQ, l2_newid(l2), | |
475be4d8 | 2005 | skb); |
1b2b03f8 KK |
2006 | } |
2007 | break; | |
2008 | case DL_RELEASE_REQ: | |
2009 | if (test_bit(FLG_LAPB, &l2->flag)) | |
2010 | l2down_create(l2, PH_DEACTIVATE_REQ, | |
475be4d8 | 2011 | l2_newid(l2), 0, NULL); |
1b2b03f8 | 2012 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_DL_RELEASE_REQ, |
475be4d8 | 2013 | skb); |
1b2b03f8 | 2014 | break; |
8423e6b2 KK |
2015 | case DL_TIMER200_IND: |
2016 | mISDN_FsmEvent(&l2->l2m, EV_L2_T200I, NULL); | |
2017 | break; | |
2018 | case DL_TIMER203_IND: | |
2019 | mISDN_FsmEvent(&l2->l2m, EV_L2_T203I, NULL); | |
2020 | break; | |
1b2b03f8 KK |
2021 | default: |
2022 | if (*debug & DEBUG_L2) | |
2023 | l2m_debug(&l2->l2m, "l2 unknown pr %04x", | |
475be4d8 | 2024 | hh->prim); |
1b2b03f8 KK |
2025 | } |
2026 | if (ret) { | |
2027 | dev_kfree_skb(skb); | |
2028 | ret = 0; | |
2029 | } | |
2030 | return ret; | |
2031 | } | |
2032 | ||
2033 | int | |
2034 | tei_l2(struct layer2 *l2, u_int cmd, u_long arg) | |
2035 | { | |
2036 | int ret = -EINVAL; | |
2037 | ||
2038 | if (*debug & DEBUG_L2_TEI) | |
f45ebf3a KK |
2039 | printk(KERN_DEBUG "%s: cmd(%x) in %s\n", |
2040 | mISDNDevName4ch(&l2->ch), cmd, __func__); | |
1b2b03f8 KK |
2041 | switch (cmd) { |
2042 | case (MDL_ASSIGN_REQ): | |
2043 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ASSIGN, (void *)arg); | |
2044 | break; | |
2045 | case (MDL_REMOVE_REQ): | |
2046 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_REMOVE, NULL); | |
2047 | break; | |
2048 | case (MDL_ERROR_IND): | |
2049 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL); | |
2050 | break; | |
2051 | case (MDL_ERROR_RSP): | |
2052 | /* ETS 300-125 5.3.2.1 Test: TC13010 */ | |
f45ebf3a KK |
2053 | printk(KERN_NOTICE "%s: MDL_ERROR|REQ (tei_l2)\n", |
2054 | mISDNDevName4ch(&l2->ch)); | |
1b2b03f8 KK |
2055 | ret = mISDN_FsmEvent(&l2->l2m, EV_L2_MDL_ERROR, NULL); |
2056 | break; | |
2057 | } | |
2058 | return ret; | |
2059 | } | |
2060 | ||
2061 | static void | |
2062 | release_l2(struct layer2 *l2) | |
2063 | { | |
2064 | mISDN_FsmDelTimer(&l2->t200, 21); | |
2065 | mISDN_FsmDelTimer(&l2->t203, 16); | |
2066 | skb_queue_purge(&l2->i_queue); | |
2067 | skb_queue_purge(&l2->ui_queue); | |
2068 | skb_queue_purge(&l2->down_queue); | |
2069 | ReleaseWin(l2); | |
2070 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
c5b61d59 | 2071 | TEIrelease(l2); |
1b2b03f8 KK |
2072 | if (l2->ch.st) |
2073 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, | |
475be4d8 | 2074 | CLOSE_CHANNEL, NULL); |
1b2b03f8 KK |
2075 | } |
2076 | kfree(l2); | |
2077 | } | |
2078 | ||
2079 | static int | |
2080 | l2_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
2081 | { | |
2082 | struct layer2 *l2 = container_of(ch, struct layer2, ch); | |
2083 | u_int info; | |
2084 | ||
2085 | if (*debug & DEBUG_L2_CTRL) | |
f45ebf3a KK |
2086 | printk(KERN_DEBUG "%s: %s cmd(%x)\n", |
2087 | mISDNDevName4ch(ch), __func__, cmd); | |
1b2b03f8 KK |
2088 | |
2089 | switch (cmd) { | |
2090 | case OPEN_CHANNEL: | |
2091 | if (test_bit(FLG_LAPD, &l2->flag)) { | |
2092 | set_channel_address(&l2->ch, l2->sapi, l2->tei); | |
2093 | info = DL_INFO_L2_CONNECT; | |
2094 | l2up_create(l2, DL_INFORMATION_IND, | |
475be4d8 | 2095 | sizeof(info), &info); |
1b2b03f8 KK |
2096 | } |
2097 | break; | |
2098 | case CLOSE_CHANNEL: | |
2099 | if (l2->ch.peer) | |
2100 | l2->ch.peer->ctrl(l2->ch.peer, CLOSE_CHANNEL, NULL); | |
2101 | release_l2(l2); | |
2102 | break; | |
2103 | } | |
2104 | return 0; | |
2105 | } | |
2106 | ||
2107 | struct layer2 * | |
5b277b86 | 2108 | create_l2(struct mISDNchannel *ch, u_int protocol, u_long options, int tei, |
475be4d8 | 2109 | int sapi) |
1b2b03f8 KK |
2110 | { |
2111 | struct layer2 *l2; | |
2112 | struct channel_req rq; | |
2113 | ||
2114 | l2 = kzalloc(sizeof(struct layer2), GFP_KERNEL); | |
2115 | if (!l2) { | |
2116 | printk(KERN_ERR "kzalloc layer2 failed\n"); | |
2117 | return NULL; | |
2118 | } | |
2119 | l2->next_id = 1; | |
2120 | l2->down_id = MISDN_ID_NONE; | |
2121 | l2->up = ch; | |
2122 | l2->ch.st = ch->st; | |
2123 | l2->ch.send = l2_send; | |
2124 | l2->ch.ctrl = l2_ctrl; | |
2125 | switch (protocol) { | |
2126 | case ISDN_P_LAPD_NT: | |
2127 | test_and_set_bit(FLG_LAPD, &l2->flag); | |
2128 | test_and_set_bit(FLG_LAPD_NET, &l2->flag); | |
2129 | test_and_set_bit(FLG_MOD128, &l2->flag); | |
5b277b86 | 2130 | l2->sapi = sapi; |
1b2b03f8 KK |
2131 | l2->maxlen = MAX_DFRAME_LEN; |
2132 | if (test_bit(OPTION_L2_PMX, &options)) | |
2133 | l2->window = 7; | |
2134 | else | |
2135 | l2->window = 1; | |
2136 | if (test_bit(OPTION_L2_PTP, &options)) | |
2137 | test_and_set_bit(FLG_PTP, &l2->flag); | |
2138 | if (test_bit(OPTION_L2_FIXEDTEI, &options)) | |
2139 | test_and_set_bit(FLG_FIXED_TEI, &l2->flag); | |
5b277b86 | 2140 | l2->tei = tei; |
1b2b03f8 KK |
2141 | l2->T200 = 1000; |
2142 | l2->N200 = 3; | |
2143 | l2->T203 = 10000; | |
2144 | if (test_bit(OPTION_L2_PMX, &options)) | |
2145 | rq.protocol = ISDN_P_NT_E1; | |
2146 | else | |
2147 | rq.protocol = ISDN_P_NT_S0; | |
2148 | rq.adr.channel = 0; | |
2149 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, OPEN_CHANNEL, &rq); | |
2150 | break; | |
2151 | case ISDN_P_LAPD_TE: | |
2152 | test_and_set_bit(FLG_LAPD, &l2->flag); | |
2153 | test_and_set_bit(FLG_MOD128, &l2->flag); | |
2154 | test_and_set_bit(FLG_ORIG, &l2->flag); | |
5b277b86 | 2155 | l2->sapi = sapi; |
1b2b03f8 KK |
2156 | l2->maxlen = MAX_DFRAME_LEN; |
2157 | if (test_bit(OPTION_L2_PMX, &options)) | |
2158 | l2->window = 7; | |
2159 | else | |
2160 | l2->window = 1; | |
2161 | if (test_bit(OPTION_L2_PTP, &options)) | |
2162 | test_and_set_bit(FLG_PTP, &l2->flag); | |
2163 | if (test_bit(OPTION_L2_FIXEDTEI, &options)) | |
2164 | test_and_set_bit(FLG_FIXED_TEI, &l2->flag); | |
5b277b86 | 2165 | l2->tei = tei; |
1b2b03f8 KK |
2166 | l2->T200 = 1000; |
2167 | l2->N200 = 3; | |
2168 | l2->T203 = 10000; | |
2169 | if (test_bit(OPTION_L2_PMX, &options)) | |
2170 | rq.protocol = ISDN_P_TE_E1; | |
2171 | else | |
2172 | rq.protocol = ISDN_P_TE_S0; | |
2173 | rq.adr.channel = 0; | |
2174 | l2->ch.st->dev->D.ctrl(&l2->ch.st->dev->D, OPEN_CHANNEL, &rq); | |
2175 | break; | |
2176 | case ISDN_P_B_X75SLP: | |
2177 | test_and_set_bit(FLG_LAPB, &l2->flag); | |
2178 | l2->window = 7; | |
2179 | l2->maxlen = MAX_DATA_SIZE; | |
2180 | l2->T200 = 1000; | |
2181 | l2->N200 = 4; | |
2182 | l2->T203 = 5000; | |
2183 | l2->addr.A = 3; | |
2184 | l2->addr.B = 1; | |
2185 | break; | |
2186 | default: | |
2187 | printk(KERN_ERR "layer2 create failed prt %x\n", | |
475be4d8 | 2188 | protocol); |
1b2b03f8 KK |
2189 | kfree(l2); |
2190 | return NULL; | |
2191 | } | |
2192 | skb_queue_head_init(&l2->i_queue); | |
2193 | skb_queue_head_init(&l2->ui_queue); | |
2194 | skb_queue_head_init(&l2->down_queue); | |
2195 | skb_queue_head_init(&l2->tmp_queue); | |
2196 | InitWin(l2); | |
2197 | l2->l2m.fsm = &l2fsm; | |
2198 | if (test_bit(FLG_LAPB, &l2->flag) || | |
25099335 | 2199 | test_bit(FLG_FIXED_TEI, &l2->flag) || |
475be4d8 | 2200 | test_bit(FLG_LAPD_NET, &l2->flag)) |
1b2b03f8 KK |
2201 | l2->l2m.state = ST_L2_4; |
2202 | else | |
2203 | l2->l2m.state = ST_L2_1; | |
2204 | l2->l2m.debug = *debug; | |
2205 | l2->l2m.userdata = l2; | |
2206 | l2->l2m.userint = 0; | |
2207 | l2->l2m.printdebug = l2m_debug; | |
2208 | ||
2209 | mISDN_FsmInitTimer(&l2->l2m, &l2->t200); | |
2210 | mISDN_FsmInitTimer(&l2->l2m, &l2->t203); | |
2211 | return l2; | |
2212 | } | |
2213 | ||
2214 | static int | |
2215 | x75create(struct channel_req *crq) | |
2216 | { | |
2217 | struct layer2 *l2; | |
2218 | ||
2219 | if (crq->protocol != ISDN_P_B_X75SLP) | |
2220 | return -EPROTONOSUPPORT; | |
5b277b86 | 2221 | l2 = create_l2(crq->ch, crq->protocol, 0, 0, 0); |
1b2b03f8 KK |
2222 | if (!l2) |
2223 | return -ENOMEM; | |
2224 | crq->ch = &l2->ch; | |
2225 | crq->protocol = ISDN_P_B_HDLC; | |
2226 | return 0; | |
2227 | } | |
2228 | ||
2229 | static struct Bprotocol X75SLP = { | |
2230 | .Bprotocols = (1 << (ISDN_P_B_X75SLP & ISDN_P_B_MASK)), | |
2231 | .name = "X75SLP", | |
2232 | .create = x75create | |
2233 | }; | |
2234 | ||
2235 | int | |
2236 | Isdnl2_Init(u_int *deb) | |
2237 | { | |
54a6a043 | 2238 | int res; |
1b2b03f8 KK |
2239 | debug = deb; |
2240 | mISDN_register_Bprotocol(&X75SLP); | |
2241 | l2fsm.state_count = L2_STATE_COUNT; | |
2242 | l2fsm.event_count = L2_EVENT_COUNT; | |
2243 | l2fsm.strEvent = strL2Event; | |
2244 | l2fsm.strState = strL2State; | |
54a6a043 AV |
2245 | res = mISDN_FsmNew(&l2fsm, L2FnList, ARRAY_SIZE(L2FnList)); |
2246 | if (res) | |
2247 | goto error; | |
2248 | res = TEIInit(deb); | |
2249 | if (res) | |
2250 | goto error_fsm; | |
1b2b03f8 | 2251 | return 0; |
54a6a043 AV |
2252 | |
2253 | error_fsm: | |
2254 | mISDN_FsmFree(&l2fsm); | |
2255 | error: | |
2256 | mISDN_unregister_Bprotocol(&X75SLP); | |
2257 | return res; | |
1b2b03f8 KK |
2258 | } |
2259 | ||
2260 | void | |
2261 | Isdnl2_cleanup(void) | |
2262 | { | |
2263 | mISDN_unregister_Bprotocol(&X75SLP); | |
2264 | TEIFree(); | |
2265 | mISDN_FsmFree(&l2fsm); | |
2266 | } |