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coda: kill redundant cast in coda_alloc_inode()
[zen-stable.git] / drivers / isdn / mISDN / tei.c
blob1b85d9d274965e583a5c972eb7c1a597af879dab
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 #include "layer2.h"
18 #include <linux/random.h>
19 #include <linux/slab.h>
20 #include "core.h"
21
22 #define ID_REQUEST 1
23 #define ID_ASSIGNED 2
24 #define ID_DENIED 3
25 #define ID_CHK_REQ 4
26 #define ID_CHK_RES 5
27 #define ID_REMOVE 6
28 #define ID_VERIFY 7
29
30 #define TEI_ENTITY_ID 0xf
31
32 #define MGR_PH_ACTIVE 16
33 #define MGR_PH_NOTREADY 17
34
35 #define DATIMER_VAL 10000
36
37 static u_int *debug;
38
39 static struct Fsm deactfsm = {NULL, 0, 0, NULL, NULL};
40 static struct Fsm teifsmu = {NULL, 0, 0, NULL, NULL};
41 static struct Fsm teifsmn = {NULL, 0, 0, NULL, NULL};
42
43 enum {
44 ST_L1_DEACT,
45 ST_L1_DEACT_PENDING,
46 ST_L1_ACTIV,
47 };
48 #define DEACT_STATE_COUNT (ST_L1_ACTIV+1)
49
50 static char *strDeactState[] =
51 {
52 "ST_L1_DEACT",
53 "ST_L1_DEACT_PENDING",
54 "ST_L1_ACTIV",
55 };
56
57 enum {
58 EV_ACTIVATE,
59 EV_ACTIVATE_IND,
60 EV_DEACTIVATE,
61 EV_DEACTIVATE_IND,
62 EV_UI,
63 EV_DATIMER,
64 };
65
66 #define DEACT_EVENT_COUNT (EV_DATIMER+1)
67
68 static char *strDeactEvent[] =
69 {
70 "EV_ACTIVATE",
71 "EV_ACTIVATE_IND",
72 "EV_DEACTIVATE",
73 "EV_DEACTIVATE_IND",
74 "EV_UI",
75 "EV_DATIMER",
76 };
77
78 static void
79 da_debug(struct FsmInst *fi, char *fmt, ...)
80 {
81 struct manager *mgr = fi->userdata;
82 va_list va;
83
84 if (!(*debug & DEBUG_L2_TEIFSM))
85 return;
86 va_start(va, fmt);
87 printk(KERN_DEBUG "mgr(%d): ", mgr->ch.st->dev->id);
88 vprintk(fmt, va);
89 printk("\n");
90 va_end(va);
91 }
92
93 static void
94 da_activate(struct FsmInst *fi, int event, void *arg)
95 {
96 struct manager *mgr = fi->userdata;
97
98 if (fi->state == ST_L1_DEACT_PENDING)
99 mISDN_FsmDelTimer(&mgr->datimer, 1);
100 mISDN_FsmChangeState(fi, ST_L1_ACTIV);
101 }
102
103 static void
104 da_deactivate_ind(struct FsmInst *fi, int event, void *arg)
105 {
106 mISDN_FsmChangeState(fi, ST_L1_DEACT);
107 }
108
109 static void
110 da_deactivate(struct FsmInst *fi, int event, void *arg)
111 {
112 struct manager *mgr = fi->userdata;
113 struct layer2 *l2;
114 u_long flags;
115
116 read_lock_irqsave(&mgr->lock, flags);
117 list_for_each_entry(l2, &mgr->layer2, list) {
118 if (l2->l2m.state > ST_L2_4) {
119 /* have still activ TEI */
120 read_unlock_irqrestore(&mgr->lock, flags);
121 return;
122 }
123 }
124 read_unlock_irqrestore(&mgr->lock, flags);
125 /* All TEI are inactiv */
126 if (!test_bit(OPTION_L1_HOLD, &mgr->options)) {
127 mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER,
128 NULL, 1);
129 mISDN_FsmChangeState(fi, ST_L1_DEACT_PENDING);
130 }
131 }
132
133 static void
134 da_ui(struct FsmInst *fi, int event, void *arg)
135 {
136 struct manager *mgr = fi->userdata;
137
138 /* restart da timer */
139 if (!test_bit(OPTION_L1_HOLD, &mgr->options)) {
140 mISDN_FsmDelTimer(&mgr->datimer, 2);
141 mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER,
142 NULL, 2);
143 }
144 }
145
146 static void
147 da_timer(struct FsmInst *fi, int event, void *arg)
148 {
149 struct manager *mgr = fi->userdata;
150 struct layer2 *l2;
151 u_long flags;
152
153 /* check again */
154 read_lock_irqsave(&mgr->lock, flags);
155 list_for_each_entry(l2, &mgr->layer2, list) {
156 if (l2->l2m.state > ST_L2_4) {
157 /* have still activ TEI */
158 read_unlock_irqrestore(&mgr->lock, flags);
159 mISDN_FsmChangeState(fi, ST_L1_ACTIV);
160 return;
161 }
162 }
163 read_unlock_irqrestore(&mgr->lock, flags);
164 /* All TEI are inactiv */
165 mISDN_FsmChangeState(fi, ST_L1_DEACT);
166 _queue_data(&mgr->ch, PH_DEACTIVATE_REQ, MISDN_ID_ANY, 0, NULL,
167 GFP_ATOMIC);
168 }
169
170 static struct FsmNode DeactFnList[] =
171 {
172 {ST_L1_DEACT, EV_ACTIVATE_IND, da_activate},
173 {ST_L1_ACTIV, EV_DEACTIVATE_IND, da_deactivate_ind},
174 {ST_L1_ACTIV, EV_DEACTIVATE, da_deactivate},
175 {ST_L1_DEACT_PENDING, EV_ACTIVATE, da_activate},
176 {ST_L1_DEACT_PENDING, EV_UI, da_ui},
177 {ST_L1_DEACT_PENDING, EV_DATIMER, da_timer},
178 };
179
180 enum {
181 ST_TEI_NOP,
182 ST_TEI_IDREQ,
183 ST_TEI_IDVERIFY,
184 };
185
186 #define TEI_STATE_COUNT (ST_TEI_IDVERIFY+1)
187
188 static char *strTeiState[] =
189 {
190 "ST_TEI_NOP",
191 "ST_TEI_IDREQ",
192 "ST_TEI_IDVERIFY",
193 };
194
195 enum {
196 EV_IDREQ,
197 EV_ASSIGN,
198 EV_ASSIGN_REQ,
199 EV_DENIED,
200 EV_CHKREQ,
201 EV_CHKRESP,
202 EV_REMOVE,
203 EV_VERIFY,
204 EV_TIMER,
205 };
206
207 #define TEI_EVENT_COUNT (EV_TIMER+1)
208
209 static char *strTeiEvent[] =
210 {
211 "EV_IDREQ",
212 "EV_ASSIGN",
213 "EV_ASSIGN_REQ",
214 "EV_DENIED",
215 "EV_CHKREQ",
216 "EV_CHKRESP",
217 "EV_REMOVE",
218 "EV_VERIFY",
219 "EV_TIMER",
220 };
221
222 static void
223 tei_debug(struct FsmInst *fi, char *fmt, ...)
224 {
225 struct teimgr *tm = fi->userdata;
226 va_list va;
227
228 if (!(*debug & DEBUG_L2_TEIFSM))
229 return;
230 va_start(va, fmt);
231 printk(KERN_DEBUG "sapi(%d) tei(%d): ", tm->l2->sapi, tm->l2->tei);
232 vprintk(fmt, va);
233 printk("\n");
234 va_end(va);
235 }
236
237
238
239 static int
240 get_free_id(struct manager *mgr)
241 {
242 u64 ids = 0;
243 int i;
244 struct layer2 *l2;
245
246 list_for_each_entry(l2, &mgr->layer2, list) {
247 if (l2->ch.nr > 63) {
248 printk(KERN_WARNING
249 "%s: more as 63 layer2 for one device\n",
250 __func__);
251 return -EBUSY;
252 }
253 test_and_set_bit(l2->ch.nr, (u_long *)&ids);
254 }
255 for (i = 1; i < 64; i++)
256 if (!test_bit(i, (u_long *)&ids))
257 return i;
258 printk(KERN_WARNING "%s: more as 63 layer2 for one device\n",
259 __func__);
260 return -EBUSY;
261 }
262
263 static int
264 get_free_tei(struct manager *mgr)
265 {
266 u64 ids = 0;
267 int i;
268 struct layer2 *l2;
269
270 list_for_each_entry(l2, &mgr->layer2, list) {
271 if (l2->ch.nr == 0)
272 continue;
273 if ((l2->ch.addr & 0xff) != 0)
274 continue;
275 i = l2->ch.addr >> 8;
276 if (i < 64)
277 continue;
278 i -= 64;
279
280 test_and_set_bit(i, (u_long *)&ids);
281 }
282 for (i = 0; i < 64; i++)
283 if (!test_bit(i, (u_long *)&ids))
284 return i + 64;
285 printk(KERN_WARNING "%s: more as 63 dynamic tei for one device\n",
286 __func__);
287 return -1;
288 }
289
290 static void
291 teiup_create(struct manager *mgr, u_int prim, int len, void *arg)
292 {
293 struct sk_buff *skb;
294 struct mISDNhead *hh;
295 int err;
296
297 skb = mI_alloc_skb(len, GFP_ATOMIC);
298 if (!skb)
299 return;
300 hh = mISDN_HEAD_P(skb);
301 hh->prim = prim;
302 hh->id = (mgr->ch.nr << 16) | mgr->ch.addr;
303 if (len)
304 memcpy(skb_put(skb, len), arg, len);
305 err = mgr->up->send(mgr->up, skb);
306 if (err) {
307 printk(KERN_WARNING "%s: err=%d\n", __func__, err);
308 dev_kfree_skb(skb);
309 }
310 }
311
312 static u_int
313 new_id(struct manager *mgr)
314 {
315 u_int id;
316
317 id = mgr->nextid++;
318 if (id == 0x7fff)
319 mgr->nextid = 1;
320 id <<= 16;
321 id |= GROUP_TEI << 8;
322 id |= TEI_SAPI;
323 return id;
324 }
325
326 static void
327 do_send(struct manager *mgr)
328 {
329 if (!test_bit(MGR_PH_ACTIVE, &mgr->options))
330 return;
331
332 if (!test_and_set_bit(MGR_PH_NOTREADY, &mgr->options)) {
333 struct sk_buff *skb = skb_dequeue(&mgr->sendq);
334
335 if (!skb) {
336 test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
337 return;
338 }
339 mgr->lastid = mISDN_HEAD_ID(skb);
340 mISDN_FsmEvent(&mgr->deact, EV_UI, NULL);
341 if (mgr->ch.recv(mgr->ch.peer, skb)) {
342 dev_kfree_skb(skb);
343 test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
344 mgr->lastid = MISDN_ID_NONE;
345 }
346 }
347 }
348
349 static void
350 do_ack(struct manager *mgr, u_int id)
351 {
352 if (test_bit(MGR_PH_NOTREADY, &mgr->options)) {
353 if (id == mgr->lastid) {
354 if (test_bit(MGR_PH_ACTIVE, &mgr->options)) {
355 struct sk_buff *skb;
356
357 skb = skb_dequeue(&mgr->sendq);
358 if (skb) {
359 mgr->lastid = mISDN_HEAD_ID(skb);
360 if (!mgr->ch.recv(mgr->ch.peer, skb))
361 return;
362 dev_kfree_skb(skb);
363 }
364 }
365 mgr->lastid = MISDN_ID_NONE;
366 test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
367 }
368 }
369 }
370
371 static void
372 mgr_send_down(struct manager *mgr, struct sk_buff *skb)
373 {
374 skb_queue_tail(&mgr->sendq, skb);
375 if (!test_bit(MGR_PH_ACTIVE, &mgr->options)) {
376 _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0,
377 NULL, GFP_KERNEL);
378 } else {
379 do_send(mgr);
380 }
381 }
382
383 static int
384 dl_unit_data(struct manager *mgr, struct sk_buff *skb)
385 {
386 if (!test_bit(MGR_OPT_NETWORK, &mgr->options)) /* only net send UI */
387 return -EINVAL;
388 if (!test_bit(MGR_PH_ACTIVE, &mgr->options))
389 _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0,
390 NULL, GFP_KERNEL);
391 skb_push(skb, 3);
392 skb->data[0] = 0x02; /* SAPI 0 C/R = 1 */
393 skb->data[1] = 0xff; /* TEI 127 */
394 skb->data[2] = UI; /* UI frame */
395 mISDN_HEAD_PRIM(skb) = PH_DATA_REQ;
396 mISDN_HEAD_ID(skb) = new_id(mgr);
397 skb_queue_tail(&mgr->sendq, skb);
398 do_send(mgr);
399 return 0;
400 }
401
402 static unsigned int
403 random_ri(void)
404 {
405 u16 x;
406
407 get_random_bytes(&x, sizeof(x));
408 return x;
409 }
410
411 static struct layer2 *
412 findtei(struct manager *mgr, int tei)
413 {
414 struct layer2 *l2;
415 u_long flags;
416
417 read_lock_irqsave(&mgr->lock, flags);
418 list_for_each_entry(l2, &mgr->layer2, list) {
419 if ((l2->sapi == 0) && (l2->tei > 0) &&
420 (l2->tei != GROUP_TEI) && (l2->tei == tei))
421 goto done;
422 }
423 l2 = NULL;
424 done:
425 read_unlock_irqrestore(&mgr->lock, flags);
426 return l2;
427 }
428
429 static void
430 put_tei_msg(struct manager *mgr, u_char m_id, unsigned int ri, int tei)
431 {
432 struct sk_buff *skb;
433 u_char bp[8];
434
435 bp[0] = (TEI_SAPI << 2);
436 if (test_bit(MGR_OPT_NETWORK, &mgr->options))
437 bp[0] |= 2; /* CR:=1 for net command */
438 bp[1] = (GROUP_TEI << 1) | 0x1;
439 bp[2] = UI;
440 bp[3] = TEI_ENTITY_ID;
441 bp[4] = ri >> 8;
442 bp[5] = ri & 0xff;
443 bp[6] = m_id;
444 bp[7] = ((tei << 1) & 0xff) | 1;
445 skb = _alloc_mISDN_skb(PH_DATA_REQ, new_id(mgr), 8, bp, GFP_ATOMIC);
446 if (!skb) {
447 printk(KERN_WARNING "%s: no skb for tei msg\n", __func__);
448 return;
449 }
450 mgr_send_down(mgr, skb);
451 }
452
453 static void
454 tei_id_request(struct FsmInst *fi, int event, void *arg)
455 {
456 struct teimgr *tm = fi->userdata;
457
458 if (tm->l2->tei != GROUP_TEI) {
459 tm->tei_m.printdebug(&tm->tei_m,
460 "assign request for already assigned tei %d",
461 tm->l2->tei);
462 return;
463 }
464 tm->ri = random_ri();
465 if (*debug & DEBUG_L2_TEI)
466 tm->tei_m.printdebug(&tm->tei_m,
467 "assign request ri %d", tm->ri);
468 put_tei_msg(tm->mgr, ID_REQUEST, tm->ri, GROUP_TEI);
469 mISDN_FsmChangeState(fi, ST_TEI_IDREQ);
470 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 1);
471 tm->nval = 3;
472 }
473
474 static void
475 tei_id_assign(struct FsmInst *fi, int event, void *arg)
476 {
477 struct teimgr *tm = fi->userdata;
478 struct layer2 *l2;
479 u_char *dp = arg;
480 int ri, tei;
481
482 ri = ((unsigned int) *dp++ << 8);
483 ri += *dp++;
484 dp++;
485 tei = *dp >> 1;
486 if (*debug & DEBUG_L2_TEI)
487 tm->tei_m.printdebug(fi, "identity assign ri %d tei %d",
488 ri, tei);
489 l2 = findtei(tm->mgr, tei);
490 if (l2) { /* same tei is in use */
491 if (ri != l2->tm->ri) {
492 tm->tei_m.printdebug(fi,
493 "possible duplicate assignment tei %d", tei);
494 tei_l2(l2, MDL_ERROR_RSP, 0);
495 }
496 } else if (ri == tm->ri) {
497 mISDN_FsmDelTimer(&tm->timer, 1);
498 mISDN_FsmChangeState(fi, ST_TEI_NOP);
499 tei_l2(tm->l2, MDL_ASSIGN_REQ, tei);
500 }
501 }
502
503 static void
504 tei_id_test_dup(struct FsmInst *fi, int event, void *arg)
505 {
506 struct teimgr *tm = fi->userdata;
507 struct layer2 *l2;
508 u_char *dp = arg;
509 int tei, ri;
510
511 ri = ((unsigned int) *dp++ << 8);
512 ri += *dp++;
513 dp++;
514 tei = *dp >> 1;
515 if (*debug & DEBUG_L2_TEI)
516 tm->tei_m.printdebug(fi, "foreign identity assign ri %d tei %d",
517 ri, tei);
518 l2 = findtei(tm->mgr, tei);
519 if (l2) { /* same tei is in use */
520 if (ri != l2->tm->ri) { /* and it wasn't our request */
521 tm->tei_m.printdebug(fi,
522 "possible duplicate assignment tei %d", tei);
523 mISDN_FsmEvent(&l2->tm->tei_m, EV_VERIFY, NULL);
524 }
525 }
526 }
527
528 static void
529 tei_id_denied(struct FsmInst *fi, int event, void *arg)
530 {
531 struct teimgr *tm = fi->userdata;
532 u_char *dp = arg;
533 int ri, tei;
534
535 ri = ((unsigned int) *dp++ << 8);
536 ri += *dp++;
537 dp++;
538 tei = *dp >> 1;
539 if (*debug & DEBUG_L2_TEI)
540 tm->tei_m.printdebug(fi, "identity denied ri %d tei %d",
541 ri, tei);
542 }
543
544 static void
545 tei_id_chk_req(struct FsmInst *fi, int event, void *arg)
546 {
547 struct teimgr *tm = fi->userdata;
548 u_char *dp = arg;
549 int tei;
550
551 tei = *(dp+3) >> 1;
552 if (*debug & DEBUG_L2_TEI)
553 tm->tei_m.printdebug(fi, "identity check req tei %d", tei);
554 if ((tm->l2->tei != GROUP_TEI) && ((tei == GROUP_TEI) ||
555 (tei == tm->l2->tei))) {
556 mISDN_FsmDelTimer(&tm->timer, 4);
557 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP);
558 put_tei_msg(tm->mgr, ID_CHK_RES, random_ri(), tm->l2->tei);
559 }
560 }
561
562 static void
563 tei_id_remove(struct FsmInst *fi, int event, void *arg)
564 {
565 struct teimgr *tm = fi->userdata;
566 u_char *dp = arg;
567 int tei;
568
569 tei = *(dp+3) >> 1;
570 if (*debug & DEBUG_L2_TEI)
571 tm->tei_m.printdebug(fi, "identity remove tei %d", tei);
572 if ((tm->l2->tei != GROUP_TEI) &&
573 ((tei == GROUP_TEI) || (tei == tm->l2->tei))) {
574 mISDN_FsmDelTimer(&tm->timer, 5);
575 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP);
576 tei_l2(tm->l2, MDL_REMOVE_REQ, 0);
577 }
578 }
579
580 static void
581 tei_id_verify(struct FsmInst *fi, int event, void *arg)
582 {
583 struct teimgr *tm = fi->userdata;
584
585 if (*debug & DEBUG_L2_TEI)
586 tm->tei_m.printdebug(fi, "id verify request for tei %d",
587 tm->l2->tei);
588 put_tei_msg(tm->mgr, ID_VERIFY, 0, tm->l2->tei);
589 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY);
590 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2);
591 tm->nval = 2;
592 }
593
594 static void
595 tei_id_req_tout(struct FsmInst *fi, int event, void *arg)
596 {
597 struct teimgr *tm = fi->userdata;
598
599 if (--tm->nval) {
600 tm->ri = random_ri();
601 if (*debug & DEBUG_L2_TEI)
602 tm->tei_m.printdebug(fi, "assign req(%d) ri %d",
603 4 - tm->nval, tm->ri);
604 put_tei_msg(tm->mgr, ID_REQUEST, tm->ri, GROUP_TEI);
605 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 3);
606 } else {
607 tm->tei_m.printdebug(fi, "assign req failed");
608 tei_l2(tm->l2, MDL_ERROR_RSP, 0);
609 mISDN_FsmChangeState(fi, ST_TEI_NOP);
610 }
611 }
612
613 static void
614 tei_id_ver_tout(struct FsmInst *fi, int event, void *arg)
615 {
616 struct teimgr *tm = fi->userdata;
617
618 if (--tm->nval) {
619 if (*debug & DEBUG_L2_TEI)
620 tm->tei_m.printdebug(fi,
621 "id verify req(%d) for tei %d",
622 3 - tm->nval, tm->l2->tei);
623 put_tei_msg(tm->mgr, ID_VERIFY, 0, tm->l2->tei);
624 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4);
625 } else {
626 tm->tei_m.printdebug(fi, "verify req for tei %d failed",
627 tm->l2->tei);
628 tei_l2(tm->l2, MDL_REMOVE_REQ, 0);
629 mISDN_FsmChangeState(fi, ST_TEI_NOP);
630 }
631 }
632
633 static struct FsmNode TeiFnListUser[] =
634 {
635 {ST_TEI_NOP, EV_IDREQ, tei_id_request},
636 {ST_TEI_NOP, EV_ASSIGN, tei_id_test_dup},
637 {ST_TEI_NOP, EV_VERIFY, tei_id_verify},
638 {ST_TEI_NOP, EV_REMOVE, tei_id_remove},
639 {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req},
640 {ST_TEI_IDREQ, EV_TIMER, tei_id_req_tout},
641 {ST_TEI_IDREQ, EV_ASSIGN, tei_id_assign},
642 {ST_TEI_IDREQ, EV_DENIED, tei_id_denied},
643 {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout},
644 {ST_TEI_IDVERIFY, EV_REMOVE, tei_id_remove},
645 {ST_TEI_IDVERIFY, EV_CHKREQ, tei_id_chk_req},
646 };
647
648 static void
649 tei_l2remove(struct layer2 *l2)
650 {
651 put_tei_msg(l2->tm->mgr, ID_REMOVE, 0, l2->tei);
652 tei_l2(l2, MDL_REMOVE_REQ, 0);
653 list_del(&l2->ch.list);
654 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
655 }
656
657 static void
658 tei_assign_req(struct FsmInst *fi, int event, void *arg)
659 {
660 struct teimgr *tm = fi->userdata;
661 u_char *dp = arg;
662
663 if (tm->l2->tei == GROUP_TEI) {
664 tm->tei_m.printdebug(&tm->tei_m,
665 "net tei assign request without tei");
666 return;
667 }
668 tm->ri = ((unsigned int) *dp++ << 8);
669 tm->ri += *dp++;
670 if (*debug & DEBUG_L2_TEI)
671 tm->tei_m.printdebug(&tm->tei_m,
672 "net assign request ri %d teim %d", tm->ri, *dp);
673 put_tei_msg(tm->mgr, ID_ASSIGNED, tm->ri, tm->l2->tei);
674 mISDN_FsmChangeState(fi, ST_TEI_NOP);
675 }
676
677 static void
678 tei_id_chk_req_net(struct FsmInst *fi, int event, void *arg)
679 {
680 struct teimgr *tm = fi->userdata;
681
682 if (*debug & DEBUG_L2_TEI)
683 tm->tei_m.printdebug(fi, "id check request for tei %d",
684 tm->l2->tei);
685 tm->rcnt = 0;
686 put_tei_msg(tm->mgr, ID_CHK_REQ, 0, tm->l2->tei);
687 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY);
688 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2);
689 tm->nval = 2;
690 }
691
692 static void
693 tei_id_chk_resp(struct FsmInst *fi, int event, void *arg)
694 {
695 struct teimgr *tm = fi->userdata;
696 u_char *dp = arg;
697 int tei;
698
699 tei = dp[3] >> 1;
700 if (*debug & DEBUG_L2_TEI)
701 tm->tei_m.printdebug(fi, "identity check resp tei %d", tei);
702 if (tei == tm->l2->tei)
703 tm->rcnt++;
704 }
705
706 static void
707 tei_id_verify_net(struct FsmInst *fi, int event, void *arg)
708 {
709 struct teimgr *tm = fi->userdata;
710 u_char *dp = arg;
711 int tei;
712
713 tei = dp[3] >> 1;
714 if (*debug & DEBUG_L2_TEI)
715 tm->tei_m.printdebug(fi, "identity verify req tei %d/%d",
716 tei, tm->l2->tei);
717 if (tei == tm->l2->tei)
718 tei_id_chk_req_net(fi, event, arg);
719 }
720
721 static void
722 tei_id_ver_tout_net(struct FsmInst *fi, int event, void *arg)
723 {
724 struct teimgr *tm = fi->userdata;
725
726 if (tm->rcnt == 1) {
727 if (*debug & DEBUG_L2_TEI)
728 tm->tei_m.printdebug(fi,
729 "check req for tei %d successful\n", tm->l2->tei);
730 mISDN_FsmChangeState(fi, ST_TEI_NOP);
731 } else if (tm->rcnt > 1) {
732 /* duplicate assignment; remove */
733 tei_l2remove(tm->l2);
734 } else if (--tm->nval) {
735 if (*debug & DEBUG_L2_TEI)
736 tm->tei_m.printdebug(fi,
737 "id check req(%d) for tei %d",
738 3 - tm->nval, tm->l2->tei);
739 put_tei_msg(tm->mgr, ID_CHK_REQ, 0, tm->l2->tei);
740 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4);
741 } else {
742 tm->tei_m.printdebug(fi, "check req for tei %d failed",
743 tm->l2->tei);
744 mISDN_FsmChangeState(fi, ST_TEI_NOP);
745 tei_l2remove(tm->l2);
746 }
747 }
748
749 static struct FsmNode TeiFnListNet[] =
750 {
751 {ST_TEI_NOP, EV_ASSIGN_REQ, tei_assign_req},
752 {ST_TEI_NOP, EV_VERIFY, tei_id_verify_net},
753 {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req_net},
754 {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout_net},
755 {ST_TEI_IDVERIFY, EV_CHKRESP, tei_id_chk_resp},
756 };
757
758 static void
759 tei_ph_data_ind(struct teimgr *tm, u_int mt, u_char *dp, int len)
760 {
761 if (test_bit(FLG_FIXED_TEI, &tm->l2->flag))
762 return;
763 if (*debug & DEBUG_L2_TEI)
764 tm->tei_m.printdebug(&tm->tei_m, "tei handler mt %x", mt);
765 if (mt == ID_ASSIGNED)
766 mISDN_FsmEvent(&tm->tei_m, EV_ASSIGN, dp);
767 else if (mt == ID_DENIED)
768 mISDN_FsmEvent(&tm->tei_m, EV_DENIED, dp);
769 else if (mt == ID_CHK_REQ)
770 mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, dp);
771 else if (mt == ID_REMOVE)
772 mISDN_FsmEvent(&tm->tei_m, EV_REMOVE, dp);
773 else if (mt == ID_VERIFY)
774 mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, dp);
775 else if (mt == ID_CHK_RES)
776 mISDN_FsmEvent(&tm->tei_m, EV_CHKRESP, dp);
777 }
778
779 static struct layer2 *
780 create_new_tei(struct manager *mgr, int tei, int sapi)
781 {
782 u_long opt = 0;
783 u_long flags;
784 int id;
785 struct layer2 *l2;
786
787 if (!mgr->up)
788 return NULL;
789 if ((tei >= 0) && (tei < 64))
790 test_and_set_bit(OPTION_L2_FIXEDTEI, &opt);
791 if (mgr->ch.st->dev->Dprotocols
792 & ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1)))
793 test_and_set_bit(OPTION_L2_PMX, &opt);
794 l2 = create_l2(mgr->up, ISDN_P_LAPD_NT, opt, tei, sapi);
795 if (!l2) {
796 printk(KERN_WARNING "%s:no memory for layer2\n", __func__);
797 return NULL;
798 }
799 l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL);
800 if (!l2->tm) {
801 kfree(l2);
802 printk(KERN_WARNING "%s:no memory for teimgr\n", __func__);
803 return NULL;
804 }
805 l2->tm->mgr = mgr;
806 l2->tm->l2 = l2;
807 l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM;
808 l2->tm->tei_m.userdata = l2->tm;
809 l2->tm->tei_m.printdebug = tei_debug;
810 l2->tm->tei_m.fsm = &teifsmn;
811 l2->tm->tei_m.state = ST_TEI_NOP;
812 l2->tm->tval = 2000; /* T202 2 sec */
813 mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer);
814 write_lock_irqsave(&mgr->lock, flags);
815 id = get_free_id(mgr);
816 list_add_tail(&l2->list, &mgr->layer2);
817 write_unlock_irqrestore(&mgr->lock, flags);
818 if (id < 0) {
819 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
820 printk(KERN_WARNING "%s:no free id\n", __func__);
821 return NULL;
822 } else {
823 l2->ch.nr = id;
824 __add_layer2(&l2->ch, mgr->ch.st);
825 l2->ch.recv = mgr->ch.recv;
826 l2->ch.peer = mgr->ch.peer;
827 l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL);
828 }
829 return l2;
830 }
831
832 static void
833 new_tei_req(struct manager *mgr, u_char *dp)
834 {
835 int tei, ri;
836 struct layer2 *l2;
837
838 ri = dp[0] << 8;
839 ri += dp[1];
840 if (!mgr->up)
841 goto denied;
842 if (!(dp[3] & 1)) /* Extension bit != 1 */
843 goto denied;
844 if (dp[3] != 0xff)
845 tei = dp[3] >> 1; /* 3GPP TS 08.56 6.1.11.2 */
846 else
847 tei = get_free_tei(mgr);
848 if (tei < 0) {
849 printk(KERN_WARNING "%s:No free tei\n", __func__);
850 goto denied;
851 }
852 l2 = create_new_tei(mgr, tei, CTRL_SAPI);
853 if (!l2)
854 goto denied;
855 else
856 mISDN_FsmEvent(&l2->tm->tei_m, EV_ASSIGN_REQ, dp);
857 return;
858 denied:
859 put_tei_msg(mgr, ID_DENIED, ri, GROUP_TEI);
860 }
861
862 static int
863 ph_data_ind(struct manager *mgr, struct sk_buff *skb)
864 {
865 int ret = -EINVAL;
866 struct layer2 *l2, *nl2;
867 u_char mt;
868
869 if (skb->len < 8) {
870 if (*debug & DEBUG_L2_TEI)
871 printk(KERN_DEBUG "%s: short mgr frame %d/8\n",
872 __func__, skb->len);
873 goto done;
874 }
875
876 if ((skb->data[0] >> 2) != TEI_SAPI) /* not for us */
877 goto done;
878 if (skb->data[0] & 1) /* EA0 formal error */
879 goto done;
880 if (!(skb->data[1] & 1)) /* EA1 formal error */
881 goto done;
882 if ((skb->data[1] >> 1) != GROUP_TEI) /* not for us */
883 goto done;
884 if ((skb->data[2] & 0xef) != UI) /* not UI */
885 goto done;
886 if (skb->data[3] != TEI_ENTITY_ID) /* not tei entity */
887 goto done;
888 mt = skb->data[6];
889 switch (mt) {
890 case ID_REQUEST:
891 case ID_CHK_RES:
892 case ID_VERIFY:
893 if (!test_bit(MGR_OPT_NETWORK, &mgr->options))
894 goto done;
895 break;
896 case ID_ASSIGNED:
897 case ID_DENIED:
898 case ID_CHK_REQ:
899 case ID_REMOVE:
900 if (test_bit(MGR_OPT_NETWORK, &mgr->options))
901 goto done;
902 break;
903 default:
904 goto done;
905 }
906 ret = 0;
907 if (mt == ID_REQUEST) {
908 new_tei_req(mgr, &skb->data[4]);
909 goto done;
910 }
911 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
912 tei_ph_data_ind(l2->tm, mt, &skb->data[4], skb->len - 4);
913 }
914 done:
915 return ret;
916 }
917
918 int
919 l2_tei(struct layer2 *l2, u_int cmd, u_long arg)
920 {
921 struct teimgr *tm = l2->tm;
922
923 if (test_bit(FLG_FIXED_TEI, &l2->flag))
924 return 0;
925 if (*debug & DEBUG_L2_TEI)
926 printk(KERN_DEBUG "%s: cmd(%x)\n", __func__, cmd);
927 switch (cmd) {
928 case MDL_ASSIGN_IND:
929 mISDN_FsmEvent(&tm->tei_m, EV_IDREQ, NULL);
930 break;
931 case MDL_ERROR_IND:
932 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
933 mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, &l2->tei);
934 if (test_bit(MGR_OPT_USER, &tm->mgr->options))
935 mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, NULL);
936 break;
937 case MDL_STATUS_UP_IND:
938 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
939 mISDN_FsmEvent(&tm->mgr->deact, EV_ACTIVATE, NULL);
940 break;
941 case MDL_STATUS_DOWN_IND:
942 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
943 mISDN_FsmEvent(&tm->mgr->deact, EV_DEACTIVATE, NULL);
944 break;
945 case MDL_STATUS_UI_IND:
946 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
947 mISDN_FsmEvent(&tm->mgr->deact, EV_UI, NULL);
948 break;
949 }
950 return 0;
951 }
952
953 void
954 TEIrelease(struct layer2 *l2)
955 {
956 struct teimgr *tm = l2->tm;
957 u_long flags;
958
959 mISDN_FsmDelTimer(&tm->timer, 1);
960 write_lock_irqsave(&tm->mgr->lock, flags);
961 list_del(&l2->list);
962 write_unlock_irqrestore(&tm->mgr->lock, flags);
963 l2->tm = NULL;
964 kfree(tm);
965 }
966
967 static int
968 create_teimgr(struct manager *mgr, struct channel_req *crq)
969 {
970 struct layer2 *l2;
971 u_long opt = 0;
972 u_long flags;
973 int id;
974
975 if (*debug & DEBUG_L2_TEI)
976 printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n",
977 __func__, dev_name(&mgr->ch.st->dev->dev),
978 crq->protocol, crq->adr.dev, crq->adr.channel,
979 crq->adr.sapi, crq->adr.tei);
980 if (crq->adr.tei > GROUP_TEI)
981 return -EINVAL;
982 if (crq->adr.tei < 64)
983 test_and_set_bit(OPTION_L2_FIXEDTEI, &opt);
984 if (crq->adr.tei == 0)
985 test_and_set_bit(OPTION_L2_PTP, &opt);
986 if (test_bit(MGR_OPT_NETWORK, &mgr->options)) {
987 if (crq->protocol == ISDN_P_LAPD_TE)
988 return -EPROTONOSUPPORT;
989 if ((crq->adr.tei != 0) && (crq->adr.tei != 127))
990 return -EINVAL;
991 if (mgr->up) {
992 printk(KERN_WARNING
993 "%s: only one network manager is allowed\n",
994 __func__);
995 return -EBUSY;
996 }
997 } else if (test_bit(MGR_OPT_USER, &mgr->options)) {
998 if (crq->protocol == ISDN_P_LAPD_NT)
999 return -EPROTONOSUPPORT;
1000 if ((crq->adr.tei >= 64) && (crq->adr.tei < GROUP_TEI))
1001 return -EINVAL; /* dyn tei */
1002 } else {
1003 if (crq->protocol == ISDN_P_LAPD_NT)
1004 test_and_set_bit(MGR_OPT_NETWORK, &mgr->options);
1005 if (crq->protocol == ISDN_P_LAPD_TE)
1006 test_and_set_bit(MGR_OPT_USER, &mgr->options);
1007 }
1008 if (mgr->ch.st->dev->Dprotocols
1009 & ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1)))
1010 test_and_set_bit(OPTION_L2_PMX, &opt);
1011 if ((crq->protocol == ISDN_P_LAPD_NT) && (crq->adr.tei == 127)) {
1012 mgr->up = crq->ch;
1013 id = DL_INFO_L2_CONNECT;
1014 teiup_create(mgr, DL_INFORMATION_IND, sizeof(id), &id);
1015 crq->ch = NULL;
1016 if (!list_empty(&mgr->layer2)) {
1017 read_lock_irqsave(&mgr->lock, flags);
1018 list_for_each_entry(l2, &mgr->layer2, list) {
1019 l2->up = mgr->up;
1020 l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL);
1021 }
1022 read_unlock_irqrestore(&mgr->lock, flags);
1023 }
1024 return 0;
1025 }
1026 l2 = create_l2(crq->ch, crq->protocol, opt,
1027 crq->adr.tei, crq->adr.sapi);
1028 if (!l2)
1029 return -ENOMEM;
1030 l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL);
1031 if (!l2->tm) {
1032 kfree(l2);
1033 printk(KERN_ERR "kmalloc teimgr failed\n");
1034 return -ENOMEM;
1035 }
1036 l2->tm->mgr = mgr;
1037 l2->tm->l2 = l2;
1038 l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM;
1039 l2->tm->tei_m.userdata = l2->tm;
1040 l2->tm->tei_m.printdebug = tei_debug;
1041 if (crq->protocol == ISDN_P_LAPD_TE) {
1042 l2->tm->tei_m.fsm = &teifsmu;
1043 l2->tm->tei_m.state = ST_TEI_NOP;
1044 l2->tm->tval = 1000; /* T201 1 sec */
1045 } else {
1046 l2->tm->tei_m.fsm = &teifsmn;
1047 l2->tm->tei_m.state = ST_TEI_NOP;
1048 l2->tm->tval = 2000; /* T202 2 sec */
1049 }
1050 mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer);
1051 write_lock_irqsave(&mgr->lock, flags);
1052 id = get_free_id(mgr);
1053 list_add_tail(&l2->list, &mgr->layer2);
1054 write_unlock_irqrestore(&mgr->lock, flags);
1055 if (id < 0) {
1056 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1057 } else {
1058 l2->ch.nr = id;
1059 l2->up->nr = id;
1060 crq->ch = &l2->ch;
1061 id = 0;
1062 }
1063 return id;
1064 }
1065
1066 static int
1067 mgr_send(struct mISDNchannel *ch, struct sk_buff *skb)
1068 {
1069 struct manager *mgr;
1070 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1071 int ret = -EINVAL;
1072
1073 mgr = container_of(ch, struct manager, ch);
1074 if (*debug & DEBUG_L2_RECV)
1075 printk(KERN_DEBUG "%s: prim(%x) id(%x)\n",
1076 __func__, hh->prim, hh->id);
1077 switch (hh->prim) {
1078 case PH_DATA_IND:
1079 mISDN_FsmEvent(&mgr->deact, EV_UI, NULL);
1080 ret = ph_data_ind(mgr, skb);
1081 break;
1082 case PH_DATA_CNF:
1083 do_ack(mgr, hh->id);
1084 ret = 0;
1085 break;
1086 case PH_ACTIVATE_IND:
1087 test_and_set_bit(MGR_PH_ACTIVE, &mgr->options);
1088 mISDN_FsmEvent(&mgr->deact, EV_ACTIVATE_IND, NULL);
1089 do_send(mgr);
1090 ret = 0;
1091 break;
1092 case PH_DEACTIVATE_IND:
1093 test_and_clear_bit(MGR_PH_ACTIVE, &mgr->options);
1094 mISDN_FsmEvent(&mgr->deact, EV_DEACTIVATE_IND, NULL);
1095 ret = 0;
1096 break;
1097 case DL_UNITDATA_REQ:
1098 return dl_unit_data(mgr, skb);
1099 }
1100 if (!ret)
1101 dev_kfree_skb(skb);
1102 return ret;
1103 }
1104
1105 static int
1106 free_teimanager(struct manager *mgr)
1107 {
1108 struct layer2 *l2, *nl2;
1109
1110 test_and_clear_bit(OPTION_L1_HOLD, &mgr->options);
1111 if (test_bit(MGR_OPT_NETWORK, &mgr->options)) {
1112 /* not locked lock is taken in release tei */
1113 mgr->up = NULL;
1114 if (test_bit(OPTION_L2_CLEANUP, &mgr->options)) {
1115 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1116 put_tei_msg(mgr, ID_REMOVE, 0, l2->tei);
1117 mutex_lock(&mgr->ch.st->lmutex);
1118 list_del(&l2->ch.list);
1119 mutex_unlock(&mgr->ch.st->lmutex);
1120 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1121 }
1122 test_and_clear_bit(MGR_OPT_NETWORK, &mgr->options);
1123 } else {
1124 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1125 l2->up = NULL;
1126 }
1127 }
1128 }
1129 if (test_bit(MGR_OPT_USER, &mgr->options)) {
1130 if (list_empty(&mgr->layer2))
1131 test_and_clear_bit(MGR_OPT_USER, &mgr->options);
1132 }
1133 mgr->ch.st->dev->D.ctrl(&mgr->ch.st->dev->D, CLOSE_CHANNEL, NULL);
1134 return 0;
1135 }
1136
1137 static int
1138 ctrl_teimanager(struct manager *mgr, void *arg)
1139 {
1140 /* currently we only have one option */
1141 int *val = (int *)arg;
1142 int ret = 0;
1143
1144 switch (val[0]) {
1145 case IMCLEAR_L2:
1146 if (val[1])
1147 test_and_set_bit(OPTION_L2_CLEANUP, &mgr->options);
1148 else
1149 test_and_clear_bit(OPTION_L2_CLEANUP, &mgr->options);
1150 break;
1151 case IMHOLD_L1:
1152 if (val[1])
1153 test_and_set_bit(OPTION_L1_HOLD, &mgr->options);
1154 else
1155 test_and_clear_bit(OPTION_L1_HOLD, &mgr->options);
1156 break;
1157 default:
1158 ret = -EINVAL;
1159 }
1160 return ret;
1161 }
1162
1163 /* This function does create a L2 for fixed TEI in NT Mode */
1164 static int
1165 check_data(struct manager *mgr, struct sk_buff *skb)
1166 {
1167 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1168 int ret, tei, sapi;
1169 struct layer2 *l2;
1170
1171 if (*debug & DEBUG_L2_CTRL)
1172 printk(KERN_DEBUG "%s: prim(%x) id(%x)\n",
1173 __func__, hh->prim, hh->id);
1174 if (test_bit(MGR_OPT_USER, &mgr->options))
1175 return -ENOTCONN;
1176 if (hh->prim != PH_DATA_IND)
1177 return -ENOTCONN;
1178 if (skb->len != 3)
1179 return -ENOTCONN;
1180 if (skb->data[0] & 3) /* EA0 and CR must be 0 */
1181 return -EINVAL;
1182 sapi = skb->data[0] >> 2;
1183 if (!(skb->data[1] & 1)) /* invalid EA1 */
1184 return -EINVAL;
1185 tei = skb->data[1] >> 1;
1186 if (tei > 63) /* not a fixed tei */
1187 return -ENOTCONN;
1188 if ((skb->data[2] & ~0x10) != SABME)
1189 return -ENOTCONN;
1190 /* We got a SABME for a fixed TEI */
1191 if (*debug & DEBUG_L2_CTRL)
1192 printk(KERN_DEBUG "%s: SABME sapi(%d) tei(%d)\n",
1193 __func__, sapi, tei);
1194 l2 = create_new_tei(mgr, tei, sapi);
1195 if (!l2) {
1196 if (*debug & DEBUG_L2_CTRL)
1197 printk(KERN_DEBUG "%s: failed to create new tei\n",
1198 __func__);
1199 return -ENOMEM;
1200 }
1201 ret = l2->ch.send(&l2->ch, skb);
1202 return ret;
1203 }
1204
1205 void
1206 delete_teimanager(struct mISDNchannel *ch)
1207 {
1208 struct manager *mgr;
1209 struct layer2 *l2, *nl2;
1210
1211 mgr = container_of(ch, struct manager, ch);
1212 /* not locked lock is taken in release tei */
1213 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1214 mutex_lock(&mgr->ch.st->lmutex);
1215 list_del(&l2->ch.list);
1216 mutex_unlock(&mgr->ch.st->lmutex);
1217 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1218 }
1219 list_del(&mgr->ch.list);
1220 list_del(&mgr->bcast.list);
1221 skb_queue_purge(&mgr->sendq);
1222 kfree(mgr);
1223 }
1224
1225 static int
1226 mgr_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1227 {
1228 struct manager *mgr;
1229 int ret = -EINVAL;
1230
1231 mgr = container_of(ch, struct manager, ch);
1232 if (*debug & DEBUG_L2_CTRL)
1233 printk(KERN_DEBUG "%s(%x, %p)\n", __func__, cmd, arg);
1234 switch (cmd) {
1235 case OPEN_CHANNEL:
1236 ret = create_teimgr(mgr, arg);
1237 break;
1238 case CLOSE_CHANNEL:
1239 ret = free_teimanager(mgr);
1240 break;
1241 case CONTROL_CHANNEL:
1242 ret = ctrl_teimanager(mgr, arg);
1243 break;
1244 case CHECK_DATA:
1245 ret = check_data(mgr, arg);
1246 break;
1247 }
1248 return ret;
1249 }
1250
1251 static int
1252 mgr_bcast(struct mISDNchannel *ch, struct sk_buff *skb)
1253 {
1254 struct manager *mgr = container_of(ch, struct manager, bcast);
1255 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1256 struct sk_buff *cskb = NULL;
1257 struct layer2 *l2;
1258 u_long flags;
1259 int ret;
1260
1261 read_lock_irqsave(&mgr->lock, flags);
1262 list_for_each_entry(l2, &mgr->layer2, list) {
1263 if ((hh->id & MISDN_ID_SAPI_MASK) ==
1264 (l2->ch.addr & MISDN_ID_SAPI_MASK)) {
1265 if (list_is_last(&l2->list, &mgr->layer2)) {
1266 cskb = skb;
1267 skb = NULL;
1268 } else {
1269 if (!cskb)
1270 cskb = skb_copy(skb, GFP_KERNEL);
1271 }
1272 if (cskb) {
1273 ret = l2->ch.send(&l2->ch, cskb);
1274 if (ret) {
1275 if (*debug & DEBUG_SEND_ERR)
1276 printk(KERN_DEBUG
1277 "%s ch%d prim(%x) addr(%x)"
1278 " err %d\n",
1279 __func__, l2->ch.nr,
1280 hh->prim, l2->ch.addr, ret);
1281 } else
1282 cskb = NULL;
1283 } else {
1284 printk(KERN_WARNING "%s ch%d addr %x no mem\n",
1285 __func__, ch->nr, ch->addr);
1286 goto out;
1287 }
1288 }
1289 }
1290 out:
1291 read_unlock_irqrestore(&mgr->lock, flags);
1292 if (cskb)
1293 dev_kfree_skb(cskb);
1294 if (skb)
1295 dev_kfree_skb(skb);
1296 return 0;
1297 }
1298
1299 static int
1300 mgr_bcast_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1301 {
1302
1303 return -EINVAL;
1304 }
1305
1306 int
1307 create_teimanager(struct mISDNdevice *dev)
1308 {
1309 struct manager *mgr;
1310
1311 mgr = kzalloc(sizeof(struct manager), GFP_KERNEL);
1312 if (!mgr)
1313 return -ENOMEM;
1314 INIT_LIST_HEAD(&mgr->layer2);
1315 rwlock_init(&mgr->lock);
1316 skb_queue_head_init(&mgr->sendq);
1317 mgr->nextid = 1;
1318 mgr->lastid = MISDN_ID_NONE;
1319 mgr->ch.send = mgr_send;
1320 mgr->ch.ctrl = mgr_ctrl;
1321 mgr->ch.st = dev->D.st;
1322 set_channel_address(&mgr->ch, TEI_SAPI, GROUP_TEI);
1323 add_layer2(&mgr->ch, dev->D.st);
1324 mgr->bcast.send = mgr_bcast;
1325 mgr->bcast.ctrl = mgr_bcast_ctrl;
1326 mgr->bcast.st = dev->D.st;
1327 set_channel_address(&mgr->bcast, 0, GROUP_TEI);
1328 add_layer2(&mgr->bcast, dev->D.st);
1329 mgr->deact.debug = *debug & DEBUG_MANAGER;
1330 mgr->deact.userdata = mgr;
1331 mgr->deact.printdebug = da_debug;
1332 mgr->deact.fsm = &deactfsm;
1333 mgr->deact.state = ST_L1_DEACT;
1334 mISDN_FsmInitTimer(&mgr->deact, &mgr->datimer);
1335 dev->teimgr = &mgr->ch;
1336 return 0;
1337 }
1338
1339 int TEIInit(u_int *deb)
1340 {
1341 debug = deb;
1342 teifsmu.state_count = TEI_STATE_COUNT;
1343 teifsmu.event_count = TEI_EVENT_COUNT;
1344 teifsmu.strEvent = strTeiEvent;
1345 teifsmu.strState = strTeiState;
1346 mISDN_FsmNew(&teifsmu, TeiFnListUser, ARRAY_SIZE(TeiFnListUser));
1347 teifsmn.state_count = TEI_STATE_COUNT;
1348 teifsmn.event_count = TEI_EVENT_COUNT;
1349 teifsmn.strEvent = strTeiEvent;
1350 teifsmn.strState = strTeiState;
1351 mISDN_FsmNew(&teifsmn, TeiFnListNet, ARRAY_SIZE(TeiFnListNet));
1352 deactfsm.state_count = DEACT_STATE_COUNT;
1353 deactfsm.event_count = DEACT_EVENT_COUNT;
1354 deactfsm.strEvent = strDeactEvent;
1355 deactfsm.strState = strDeactState;
1356 mISDN_FsmNew(&deactfsm, DeactFnList, ARRAY_SIZE(DeactFnList));
1357 return 0;
1358 }
1359
1360 void TEIFree(void)
1361 {
1362 mISDN_FsmFree(&teifsmu);
1363 mISDN_FsmFree(&teifsmn);
1364 mISDN_FsmFree(&deactfsm);
1365 }