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AT91: Added a generic way to setup AT91 serial ports in Kconfig
[linux-2.6/pdupreez.git] / drivers / isdn / mISDN / tei.c
blob6fbae42127bfd8ebcc268db5dc029781d7618ad8
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 "core.h"
20
21 #define ID_REQUEST 1
22 #define ID_ASSIGNED 2
23 #define ID_DENIED 3
24 #define ID_CHK_REQ 4
25 #define ID_CHK_RES 5
26 #define ID_REMOVE 6
27 #define ID_VERIFY 7
28
29 #define TEI_ENTITY_ID 0xf
30
31 #define MGR_PH_ACTIVE 16
32 #define MGR_PH_NOTREADY 17
33
34 #define DATIMER_VAL 10000
35
36 static u_int *debug;
37
38 static struct Fsm deactfsm = {NULL, 0, 0, NULL, NULL};
39 static struct Fsm teifsmu = {NULL, 0, 0, NULL, NULL};
40 static struct Fsm teifsmn = {NULL, 0, 0, NULL, NULL};
41
42 enum {
43 ST_L1_DEACT,
44 ST_L1_DEACT_PENDING,
45 ST_L1_ACTIV,
46 };
47 #define DEACT_STATE_COUNT (ST_L1_ACTIV+1)
48
49 static char *strDeactState[] =
50 {
51 "ST_L1_DEACT",
52 "ST_L1_DEACT_PENDING",
53 "ST_L1_ACTIV",
54 };
55
56 enum {
57 EV_ACTIVATE,
58 EV_ACTIVATE_IND,
59 EV_DEACTIVATE,
60 EV_DEACTIVATE_IND,
61 EV_UI,
62 EV_DATIMER,
63 };
64
65 #define DEACT_EVENT_COUNT (EV_DATIMER+1)
66
67 static char *strDeactEvent[] =
68 {
69 "EV_ACTIVATE",
70 "EV_ACTIVATE_IND",
71 "EV_DEACTIVATE",
72 "EV_DEACTIVATE_IND",
73 "EV_UI",
74 "EV_DATIMER",
75 };
76
77 static void
78 da_debug(struct FsmInst *fi, char *fmt, ...)
79 {
80 struct manager *mgr = fi->userdata;
81 va_list va;
82
83 if (!(*debug & DEBUG_L2_TEIFSM))
84 return;
85 va_start(va, fmt);
86 printk(KERN_DEBUG "mgr(%d): ", mgr->ch.st->dev->id);
87 vprintk(fmt, va);
88 printk("\n");
89 va_end(va);
90 }
91
92 static void
93 da_activate(struct FsmInst *fi, int event, void *arg)
94 {
95 struct manager *mgr = fi->userdata;
96
97 if (fi->state == ST_L1_DEACT_PENDING)
98 mISDN_FsmDelTimer(&mgr->datimer, 1);
99 mISDN_FsmChangeState(fi, ST_L1_ACTIV);
100 }
101
102 static void
103 da_deactivate_ind(struct FsmInst *fi, int event, void *arg)
104 {
105 mISDN_FsmChangeState(fi, ST_L1_DEACT);
106 }
107
108 static void
109 da_deactivate(struct FsmInst *fi, int event, void *arg)
110 {
111 struct manager *mgr = fi->userdata;
112 struct layer2 *l2;
113 u_long flags;
114
115 read_lock_irqsave(&mgr->lock, flags);
116 list_for_each_entry(l2, &mgr->layer2, list) {
117 if (l2->l2m.state > ST_L2_4) {
118 /* have still activ TEI */
119 read_unlock_irqrestore(&mgr->lock, flags);
120 return;
121 }
122 }
123 read_unlock_irqrestore(&mgr->lock, flags);
124 /* All TEI are inactiv */
125 mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER, NULL, 1);
126 mISDN_FsmChangeState(fi, ST_L1_DEACT_PENDING);
127 }
128
129 static void
130 da_ui(struct FsmInst *fi, int event, void *arg)
131 {
132 struct manager *mgr = fi->userdata;
133
134 /* restart da timer */
135 mISDN_FsmDelTimer(&mgr->datimer, 2);
136 mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER, NULL, 2);
137
138 }
139
140 static void
141 da_timer(struct FsmInst *fi, int event, void *arg)
142 {
143 struct manager *mgr = fi->userdata;
144 struct layer2 *l2;
145 u_long flags;
146
147 /* check again */
148 read_lock_irqsave(&mgr->lock, flags);
149 list_for_each_entry(l2, &mgr->layer2, list) {
150 if (l2->l2m.state > ST_L2_4) {
151 /* have still activ TEI */
152 read_unlock_irqrestore(&mgr->lock, flags);
153 mISDN_FsmChangeState(fi, ST_L1_ACTIV);
154 return;
155 }
156 }
157 read_unlock_irqrestore(&mgr->lock, flags);
158 /* All TEI are inactiv */
159 mISDN_FsmChangeState(fi, ST_L1_DEACT);
160 _queue_data(&mgr->ch, PH_DEACTIVATE_REQ, MISDN_ID_ANY, 0, NULL,
161 GFP_ATOMIC);
162 }
163
164 static struct FsmNode DeactFnList[] =
165 {
166 {ST_L1_DEACT, EV_ACTIVATE_IND, da_activate},
167 {ST_L1_ACTIV, EV_DEACTIVATE_IND, da_deactivate_ind},
168 {ST_L1_ACTIV, EV_DEACTIVATE, da_deactivate},
169 {ST_L1_DEACT_PENDING, EV_ACTIVATE, da_activate},
170 {ST_L1_DEACT_PENDING, EV_UI, da_ui},
171 {ST_L1_DEACT_PENDING, EV_DATIMER, da_timer},
172 };
173
174 enum {
175 ST_TEI_NOP,
176 ST_TEI_IDREQ,
177 ST_TEI_IDVERIFY,
178 };
179
180 #define TEI_STATE_COUNT (ST_TEI_IDVERIFY+1)
181
182 static char *strTeiState[] =
183 {
184 "ST_TEI_NOP",
185 "ST_TEI_IDREQ",
186 "ST_TEI_IDVERIFY",
187 };
188
189 enum {
190 EV_IDREQ,
191 EV_ASSIGN,
192 EV_ASSIGN_REQ,
193 EV_DENIED,
194 EV_CHKREQ,
195 EV_CHKRESP,
196 EV_REMOVE,
197 EV_VERIFY,
198 EV_TIMER,
199 };
200
201 #define TEI_EVENT_COUNT (EV_TIMER+1)
202
203 static char *strTeiEvent[] =
204 {
205 "EV_IDREQ",
206 "EV_ASSIGN",
207 "EV_ASSIGN_REQ",
208 "EV_DENIED",
209 "EV_CHKREQ",
210 "EV_CHKRESP",
211 "EV_REMOVE",
212 "EV_VERIFY",
213 "EV_TIMER",
214 };
215
216 static void
217 tei_debug(struct FsmInst *fi, char *fmt, ...)
218 {
219 struct teimgr *tm = fi->userdata;
220 va_list va;
221
222 if (!(*debug & DEBUG_L2_TEIFSM))
223 return;
224 va_start(va, fmt);
225 printk(KERN_DEBUG "tei(%d): ", tm->l2->tei);
226 vprintk(fmt, va);
227 printk("\n");
228 va_end(va);
229 }
230
231
232
233 static int
234 get_free_id(struct manager *mgr)
235 {
236 u64 ids = 0;
237 int i;
238 struct layer2 *l2;
239
240 list_for_each_entry(l2, &mgr->layer2, list) {
241 if (l2->ch.nr > 63) {
242 printk(KERN_WARNING
243 "%s: more as 63 layer2 for one device\n",
244 __func__);
245 return -EBUSY;
246 }
247 test_and_set_bit(l2->ch.nr, (u_long *)&ids);
248 }
249 for (i = 1; i < 64; i++)
250 if (!test_bit(i, (u_long *)&ids))
251 return i;
252 printk(KERN_WARNING "%s: more as 63 layer2 for one device\n",
253 __func__);
254 return -EBUSY;
255 }
256
257 static int
258 get_free_tei(struct manager *mgr)
259 {
260 u64 ids = 0;
261 int i;
262 struct layer2 *l2;
263
264 list_for_each_entry(l2, &mgr->layer2, list) {
265 if (l2->ch.nr == 0)
266 continue;
267 if ((l2->ch.addr & 0xff) != 0)
268 continue;
269 i = l2->ch.addr >> 8;
270 if (i < 64)
271 continue;
272 i -= 64;
273
274 test_and_set_bit(i, (u_long *)&ids);
275 }
276 for (i = 0; i < 64; i++)
277 if (!test_bit(i, (u_long *)&ids))
278 return i + 64;
279 printk(KERN_WARNING "%s: more as 63 dynamic tei for one device\n",
280 __func__);
281 return -1;
282 }
283
284 static void
285 teiup_create(struct manager *mgr, u_int prim, int len, void *arg)
286 {
287 struct sk_buff *skb;
288 struct mISDNhead *hh;
289 int err;
290
291 skb = mI_alloc_skb(len, GFP_ATOMIC);
292 if (!skb)
293 return;
294 hh = mISDN_HEAD_P(skb);
295 hh->prim = prim;
296 hh->id = (mgr->ch.nr << 16) | mgr->ch.addr;
297 if (len)
298 memcpy(skb_put(skb, len), arg, len);
299 err = mgr->up->send(mgr->up, skb);
300 if (err) {
301 printk(KERN_WARNING "%s: err=%d\n", __func__, err);
302 dev_kfree_skb(skb);
303 }
304 }
305
306 static u_int
307 new_id(struct manager *mgr)
308 {
309 u_int id;
310
311 id = mgr->nextid++;
312 if (id == 0x7fff)
313 mgr->nextid = 1;
314 id <<= 16;
315 id |= GROUP_TEI << 8;
316 id |= TEI_SAPI;
317 return id;
318 }
319
320 static void
321 do_send(struct manager *mgr)
322 {
323 if (!test_bit(MGR_PH_ACTIVE, &mgr->options))
324 return;
325
326 if (!test_and_set_bit(MGR_PH_NOTREADY, &mgr->options)) {
327 struct sk_buff *skb = skb_dequeue(&mgr->sendq);
328
329 if (!skb) {
330 test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
331 return;
332 }
333 mgr->lastid = mISDN_HEAD_ID(skb);
334 mISDN_FsmEvent(&mgr->deact, EV_UI, NULL);
335 if (mgr->ch.recv(mgr->ch.peer, skb)) {
336 dev_kfree_skb(skb);
337 test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
338 mgr->lastid = MISDN_ID_NONE;
339 }
340 }
341 }
342
343 static void
344 do_ack(struct manager *mgr, u_int id)
345 {
346 if (test_bit(MGR_PH_NOTREADY, &mgr->options)) {
347 if (id == mgr->lastid) {
348 if (test_bit(MGR_PH_ACTIVE, &mgr->options)) {
349 struct sk_buff *skb;
350
351 skb = skb_dequeue(&mgr->sendq);
352 if (skb) {
353 mgr->lastid = mISDN_HEAD_ID(skb);
354 if (!mgr->ch.recv(mgr->ch.peer, skb))
355 return;
356 dev_kfree_skb(skb);
357 }
358 }
359 mgr->lastid = MISDN_ID_NONE;
360 test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options);
361 }
362 }
363 }
364
365 static void
366 mgr_send_down(struct manager *mgr, struct sk_buff *skb)
367 {
368 skb_queue_tail(&mgr->sendq, skb);
369 if (!test_bit(MGR_PH_ACTIVE, &mgr->options)) {
370 _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0,
371 NULL, GFP_KERNEL);
372 } else {
373 do_send(mgr);
374 }
375 }
376
377 static int
378 dl_unit_data(struct manager *mgr, struct sk_buff *skb)
379 {
380 if (!test_bit(MGR_OPT_NETWORK, &mgr->options)) /* only net send UI */
381 return -EINVAL;
382 if (!test_bit(MGR_PH_ACTIVE, &mgr->options))
383 _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0,
384 NULL, GFP_KERNEL);
385 skb_push(skb, 3);
386 skb->data[0] = 0x02; /* SAPI 0 C/R = 1 */
387 skb->data[1] = 0xff; /* TEI 127 */
388 skb->data[2] = UI; /* UI frame */
389 mISDN_HEAD_PRIM(skb) = PH_DATA_REQ;
390 mISDN_HEAD_ID(skb) = new_id(mgr);
391 skb_queue_tail(&mgr->sendq, skb);
392 do_send(mgr);
393 return 0;
394 }
395
396 unsigned int
397 random_ri(void)
398 {
399 u16 x;
400
401 get_random_bytes(&x, sizeof(x));
402 return x;
403 }
404
405 static struct layer2 *
406 findtei(struct manager *mgr, int tei)
407 {
408 struct layer2 *l2;
409 u_long flags;
410
411 read_lock_irqsave(&mgr->lock, flags);
412 list_for_each_entry(l2, &mgr->layer2, list) {
413 if ((l2->sapi == 0) && (l2->tei > 0) &&
414 (l2->tei != GROUP_TEI) && (l2->tei == tei))
415 goto done;
416 }
417 l2 = NULL;
418 done:
419 read_unlock_irqrestore(&mgr->lock, flags);
420 return l2;
421 }
422
423 static void
424 put_tei_msg(struct manager *mgr, u_char m_id, unsigned int ri, u_char tei)
425 {
426 struct sk_buff *skb;
427 u_char bp[8];
428
429 bp[0] = (TEI_SAPI << 2);
430 if (test_bit(MGR_OPT_NETWORK, &mgr->options))
431 bp[0] |= 2; /* CR:=1 for net command */
432 bp[1] = (GROUP_TEI << 1) | 0x1;
433 bp[2] = UI;
434 bp[3] = TEI_ENTITY_ID;
435 bp[4] = ri >> 8;
436 bp[5] = ri & 0xff;
437 bp[6] = m_id;
438 bp[7] = (tei << 1) | 1;
439 skb = _alloc_mISDN_skb(PH_DATA_REQ, new_id(mgr),
440 8, bp, GFP_ATOMIC);
441 if (!skb) {
442 printk(KERN_WARNING "%s: no skb for tei msg\n", __func__);
443 return;
444 }
445 mgr_send_down(mgr, skb);
446 }
447
448 static void
449 tei_id_request(struct FsmInst *fi, int event, void *arg)
450 {
451 struct teimgr *tm = fi->userdata;
452
453 if (tm->l2->tei != GROUP_TEI) {
454 tm->tei_m.printdebug(&tm->tei_m,
455 "assign request for allready assigned tei %d",
456 tm->l2->tei);
457 return;
458 }
459 tm->ri = random_ri();
460 if (*debug & DEBUG_L2_TEI)
461 tm->tei_m.printdebug(&tm->tei_m,
462 "assign request ri %d", tm->ri);
463 put_tei_msg(tm->mgr, ID_REQUEST, tm->ri, GROUP_TEI);
464 mISDN_FsmChangeState(fi, ST_TEI_IDREQ);
465 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 1);
466 tm->nval = 3;
467 }
468
469 static void
470 tei_id_assign(struct FsmInst *fi, int event, void *arg)
471 {
472 struct teimgr *tm = fi->userdata;
473 struct layer2 *l2;
474 u_char *dp = arg;
475 int ri, tei;
476
477 ri = ((unsigned int) *dp++ << 8);
478 ri += *dp++;
479 dp++;
480 tei = *dp >> 1;
481 if (*debug & DEBUG_L2_TEI)
482 tm->tei_m.printdebug(fi, "identity assign ri %d tei %d",
483 ri, tei);
484 l2 = findtei(tm->mgr, tei);
485 if (l2) { /* same tei is in use */
486 if (ri != l2->tm->ri) {
487 tm->tei_m.printdebug(fi,
488 "possible duplicate assignment tei %d", tei);
489 tei_l2(l2, MDL_ERROR_RSP, 0);
490 }
491 } else if (ri == tm->ri) {
492 mISDN_FsmDelTimer(&tm->timer, 1);
493 mISDN_FsmChangeState(fi, ST_TEI_NOP);
494 tei_l2(tm->l2, MDL_ASSIGN_REQ, tei);
495 }
496 }
497
498 static void
499 tei_id_test_dup(struct FsmInst *fi, int event, void *arg)
500 {
501 struct teimgr *tm = fi->userdata;
502 struct layer2 *l2;
503 u_char *dp = arg;
504 int tei, ri;
505
506 ri = ((unsigned int) *dp++ << 8);
507 ri += *dp++;
508 dp++;
509 tei = *dp >> 1;
510 if (*debug & DEBUG_L2_TEI)
511 tm->tei_m.printdebug(fi, "foreign identity assign ri %d tei %d",
512 ri, tei);
513 l2 = findtei(tm->mgr, tei);
514 if (l2) { /* same tei is in use */
515 if (ri != l2->tm->ri) { /* and it wasn't our request */
516 tm->tei_m.printdebug(fi,
517 "possible duplicate assignment tei %d", tei);
518 mISDN_FsmEvent(&l2->tm->tei_m, EV_VERIFY, NULL);
519 }
520 }
521 }
522
523 static void
524 tei_id_denied(struct FsmInst *fi, int event, void *arg)
525 {
526 struct teimgr *tm = fi->userdata;
527 u_char *dp = arg;
528 int ri, tei;
529
530 ri = ((unsigned int) *dp++ << 8);
531 ri += *dp++;
532 dp++;
533 tei = *dp >> 1;
534 if (*debug & DEBUG_L2_TEI)
535 tm->tei_m.printdebug(fi, "identity denied ri %d tei %d",
536 ri, tei);
537 }
538
539 static void
540 tei_id_chk_req(struct FsmInst *fi, int event, void *arg)
541 {
542 struct teimgr *tm = fi->userdata;
543 u_char *dp = arg;
544 int tei;
545
546 tei = *(dp+3) >> 1;
547 if (*debug & DEBUG_L2_TEI)
548 tm->tei_m.printdebug(fi, "identity check req tei %d", tei);
549 if ((tm->l2->tei != GROUP_TEI) && ((tei == GROUP_TEI) ||
550 (tei == tm->l2->tei))) {
551 mISDN_FsmDelTimer(&tm->timer, 4);
552 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP);
553 put_tei_msg(tm->mgr, ID_CHK_RES, random_ri(), tm->l2->tei);
554 }
555 }
556
557 static void
558 tei_id_remove(struct FsmInst *fi, int event, void *arg)
559 {
560 struct teimgr *tm = fi->userdata;
561 u_char *dp = arg;
562 int tei;
563
564 tei = *(dp+3) >> 1;
565 if (*debug & DEBUG_L2_TEI)
566 tm->tei_m.printdebug(fi, "identity remove tei %d", tei);
567 if ((tm->l2->tei != GROUP_TEI) &&
568 ((tei == GROUP_TEI) || (tei == tm->l2->tei))) {
569 mISDN_FsmDelTimer(&tm->timer, 5);
570 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP);
571 tei_l2(tm->l2, MDL_REMOVE_REQ, 0);
572 }
573 }
574
575 static void
576 tei_id_verify(struct FsmInst *fi, int event, void *arg)
577 {
578 struct teimgr *tm = fi->userdata;
579
580 if (*debug & DEBUG_L2_TEI)
581 tm->tei_m.printdebug(fi, "id verify request for tei %d",
582 tm->l2->tei);
583 put_tei_msg(tm->mgr, ID_VERIFY, 0, tm->l2->tei);
584 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY);
585 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2);
586 tm->nval = 2;
587 }
588
589 static void
590 tei_id_req_tout(struct FsmInst *fi, int event, void *arg)
591 {
592 struct teimgr *tm = fi->userdata;
593
594 if (--tm->nval) {
595 tm->ri = random_ri();
596 if (*debug & DEBUG_L2_TEI)
597 tm->tei_m.printdebug(fi, "assign req(%d) ri %d",
598 4 - tm->nval, tm->ri);
599 put_tei_msg(tm->mgr, ID_REQUEST, tm->ri, GROUP_TEI);
600 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 3);
601 } else {
602 tm->tei_m.printdebug(fi, "assign req failed");
603 tei_l2(tm->l2, MDL_ERROR_RSP, 0);
604 mISDN_FsmChangeState(fi, ST_TEI_NOP);
605 }
606 }
607
608 static void
609 tei_id_ver_tout(struct FsmInst *fi, int event, void *arg)
610 {
611 struct teimgr *tm = fi->userdata;
612
613 if (--tm->nval) {
614 if (*debug & DEBUG_L2_TEI)
615 tm->tei_m.printdebug(fi,
616 "id verify req(%d) for tei %d",
617 3 - tm->nval, tm->l2->tei);
618 put_tei_msg(tm->mgr, ID_VERIFY, 0, tm->l2->tei);
619 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4);
620 } else {
621 tm->tei_m.printdebug(fi, "verify req for tei %d failed",
622 tm->l2->tei);
623 tei_l2(tm->l2, MDL_REMOVE_REQ, 0);
624 mISDN_FsmChangeState(fi, ST_TEI_NOP);
625 }
626 }
627
628 static struct FsmNode TeiFnListUser[] =
629 {
630 {ST_TEI_NOP, EV_IDREQ, tei_id_request},
631 {ST_TEI_NOP, EV_ASSIGN, tei_id_test_dup},
632 {ST_TEI_NOP, EV_VERIFY, tei_id_verify},
633 {ST_TEI_NOP, EV_REMOVE, tei_id_remove},
634 {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req},
635 {ST_TEI_IDREQ, EV_TIMER, tei_id_req_tout},
636 {ST_TEI_IDREQ, EV_ASSIGN, tei_id_assign},
637 {ST_TEI_IDREQ, EV_DENIED, tei_id_denied},
638 {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout},
639 {ST_TEI_IDVERIFY, EV_REMOVE, tei_id_remove},
640 {ST_TEI_IDVERIFY, EV_CHKREQ, tei_id_chk_req},
641 };
642
643 static void
644 tei_l2remove(struct layer2 *l2)
645 {
646 put_tei_msg(l2->tm->mgr, ID_REMOVE, 0, l2->tei);
647 tei_l2(l2, MDL_REMOVE_REQ, 0);
648 list_del(&l2->ch.list);
649 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
650 }
651
652 static void
653 tei_assign_req(struct FsmInst *fi, int event, void *arg)
654 {
655 struct teimgr *tm = fi->userdata;
656 u_char *dp = arg;
657
658 if (tm->l2->tei == GROUP_TEI) {
659 tm->tei_m.printdebug(&tm->tei_m,
660 "net tei assign request without tei");
661 return;
662 }
663 tm->ri = ((unsigned int) *dp++ << 8);
664 tm->ri += *dp++;
665 if (*debug & DEBUG_L2_TEI)
666 tm->tei_m.printdebug(&tm->tei_m,
667 "net assign request ri %d teim %d", tm->ri, *dp);
668 put_tei_msg(tm->mgr, ID_ASSIGNED, tm->ri, tm->l2->tei);
669 mISDN_FsmChangeState(fi, ST_TEI_NOP);
670 }
671
672 static void
673 tei_id_chk_req_net(struct FsmInst *fi, int event, void *arg)
674 {
675 struct teimgr *tm = fi->userdata;
676
677 if (*debug & DEBUG_L2_TEI)
678 tm->tei_m.printdebug(fi, "id check request for tei %d",
679 tm->l2->tei);
680 tm->rcnt = 0;
681 put_tei_msg(tm->mgr, ID_CHK_REQ, 0, tm->l2->tei);
682 mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY);
683 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2);
684 tm->nval = 2;
685 }
686
687 static void
688 tei_id_chk_resp(struct FsmInst *fi, int event, void *arg)
689 {
690 struct teimgr *tm = fi->userdata;
691 u_char *dp = arg;
692 int tei;
693
694 tei = dp[3] >> 1;
695 if (*debug & DEBUG_L2_TEI)
696 tm->tei_m.printdebug(fi, "identity check resp tei %d", tei);
697 if (tei == tm->l2->tei)
698 tm->rcnt++;
699 }
700
701 static void
702 tei_id_verify_net(struct FsmInst *fi, int event, void *arg)
703 {
704 struct teimgr *tm = fi->userdata;
705 u_char *dp = arg;
706 int tei;
707
708 tei = dp[3] >> 1;
709 if (*debug & DEBUG_L2_TEI)
710 tm->tei_m.printdebug(fi, "identity verify req tei %d/%d",
711 tei, tm->l2->tei);
712 if (tei == tm->l2->tei)
713 tei_id_chk_req_net(fi, event, arg);
714 }
715
716 static void
717 tei_id_ver_tout_net(struct FsmInst *fi, int event, void *arg)
718 {
719 struct teimgr *tm = fi->userdata;
720
721 if (tm->rcnt == 1) {
722 if (*debug & DEBUG_L2_TEI)
723 tm->tei_m.printdebug(fi,
724 "check req for tei %d sucessful\n", tm->l2->tei);
725 mISDN_FsmChangeState(fi, ST_TEI_NOP);
726 } else if (tm->rcnt > 1) {
727 /* duplicate assignment; remove */
728 tei_l2remove(tm->l2);
729 } else if (--tm->nval) {
730 if (*debug & DEBUG_L2_TEI)
731 tm->tei_m.printdebug(fi,
732 "id check req(%d) for tei %d",
733 3 - tm->nval, tm->l2->tei);
734 put_tei_msg(tm->mgr, ID_CHK_REQ, 0, tm->l2->tei);
735 mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4);
736 } else {
737 tm->tei_m.printdebug(fi, "check req for tei %d failed",
738 tm->l2->tei);
739 mISDN_FsmChangeState(fi, ST_TEI_NOP);
740 tei_l2remove(tm->l2);
741 }
742 }
743
744 static struct FsmNode TeiFnListNet[] =
745 {
746 {ST_TEI_NOP, EV_ASSIGN_REQ, tei_assign_req},
747 {ST_TEI_NOP, EV_VERIFY, tei_id_verify_net},
748 {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req_net},
749 {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout_net},
750 {ST_TEI_IDVERIFY, EV_CHKRESP, tei_id_chk_resp},
751 };
752
753 static void
754 tei_ph_data_ind(struct teimgr *tm, u_int mt, u_char *dp, int len)
755 {
756 if (test_bit(FLG_FIXED_TEI, &tm->l2->flag))
757 return;
758 if (*debug & DEBUG_L2_TEI)
759 tm->tei_m.printdebug(&tm->tei_m, "tei handler mt %x", mt);
760 if (mt == ID_ASSIGNED)
761 mISDN_FsmEvent(&tm->tei_m, EV_ASSIGN, dp);
762 else if (mt == ID_DENIED)
763 mISDN_FsmEvent(&tm->tei_m, EV_DENIED, dp);
764 else if (mt == ID_CHK_REQ)
765 mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, dp);
766 else if (mt == ID_REMOVE)
767 mISDN_FsmEvent(&tm->tei_m, EV_REMOVE, dp);
768 else if (mt == ID_VERIFY)
769 mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, dp);
770 else if (mt == ID_CHK_RES)
771 mISDN_FsmEvent(&tm->tei_m, EV_CHKRESP, dp);
772 }
773
774 static struct layer2 *
775 create_new_tei(struct manager *mgr, int tei)
776 {
777 u_long opt = 0;
778 u_long flags;
779 int id;
780 struct layer2 *l2;
781
782 if (!mgr->up)
783 return NULL;
784 if (tei < 64)
785 test_and_set_bit(OPTION_L2_FIXEDTEI, &opt);
786 if (mgr->ch.st->dev->Dprotocols
787 & ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1)))
788 test_and_set_bit(OPTION_L2_PMX, &opt);
789 l2 = create_l2(mgr->up, ISDN_P_LAPD_NT, (u_int)opt, (u_long)tei);
790 if (!l2) {
791 printk(KERN_WARNING "%s:no memory for layer2\n", __func__);
792 return NULL;
793 }
794 l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL);
795 if (!l2->tm) {
796 kfree(l2);
797 printk(KERN_WARNING "%s:no memory for teimgr\n", __func__);
798 return NULL;
799 }
800 l2->tm->mgr = mgr;
801 l2->tm->l2 = l2;
802 l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM;
803 l2->tm->tei_m.userdata = l2->tm;
804 l2->tm->tei_m.printdebug = tei_debug;
805 l2->tm->tei_m.fsm = &teifsmn;
806 l2->tm->tei_m.state = ST_TEI_NOP;
807 l2->tm->tval = 2000; /* T202 2 sec */
808 mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer);
809 write_lock_irqsave(&mgr->lock, flags);
810 id = get_free_id(mgr);
811 list_add_tail(&l2->list, &mgr->layer2);
812 write_unlock_irqrestore(&mgr->lock, flags);
813 if (id < 0) {
814 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
815 printk(KERN_WARNING "%s:no free id\n", __func__);
816 return NULL;
817 } else {
818 l2->ch.nr = id;
819 __add_layer2(&l2->ch, mgr->ch.st);
820 l2->ch.recv = mgr->ch.recv;
821 l2->ch.peer = mgr->ch.peer;
822 l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL);
823 }
824 return l2;
825 }
826
827 static void
828 new_tei_req(struct manager *mgr, u_char *dp)
829 {
830 int tei, ri;
831 struct layer2 *l2;
832
833 ri = dp[0] << 8;
834 ri += dp[1];
835 if (!mgr->up)
836 goto denied;
837 tei = get_free_tei(mgr);
838 if (tei < 0) {
839 printk(KERN_WARNING "%s:No free tei\n", __func__);
840 goto denied;
841 }
842 l2 = create_new_tei(mgr, tei);
843 if (!l2)
844 goto denied;
845 else
846 mISDN_FsmEvent(&l2->tm->tei_m, EV_ASSIGN_REQ, dp);
847 return;
848 denied:
849 put_tei_msg(mgr, ID_DENIED, ri, GROUP_TEI);
850 }
851
852 static int
853 ph_data_ind(struct manager *mgr, struct sk_buff *skb)
854 {
855 int ret = -EINVAL;
856 struct layer2 *l2;
857 u_long flags;
858 u_char mt;
859
860 if (skb->len < 8) {
861 if (*debug & DEBUG_L2_TEI)
862 printk(KERN_DEBUG "%s: short mgr frame %d/8\n",
863 __func__, skb->len);
864 goto done;
865 }
866 if (*debug & DEBUG_L2_TEI)
867
868 if ((skb->data[0] >> 2) != TEI_SAPI) /* not for us */
869 goto done;
870 if (skb->data[0] & 1) /* EA0 formal error */
871 goto done;
872 if (!(skb->data[1] & 1)) /* EA1 formal error */
873 goto done;
874 if ((skb->data[1] >> 1) != GROUP_TEI) /* not for us */
875 goto done;
876 if ((skb->data[2] & 0xef) != UI) /* not UI */
877 goto done;
878 if (skb->data[3] != TEI_ENTITY_ID) /* not tei entity */
879 goto done;
880 mt = skb->data[6];
881 switch (mt) {
882 case ID_REQUEST:
883 case ID_CHK_RES:
884 case ID_VERIFY:
885 if (!test_bit(MGR_OPT_NETWORK, &mgr->options))
886 goto done;
887 break;
888 case ID_ASSIGNED:
889 case ID_DENIED:
890 case ID_CHK_REQ:
891 case ID_REMOVE:
892 if (test_bit(MGR_OPT_NETWORK, &mgr->options))
893 goto done;
894 break;
895 default:
896 goto done;
897 }
898 ret = 0;
899 if (mt == ID_REQUEST) {
900 new_tei_req(mgr, &skb->data[4]);
901 goto done;
902 }
903 read_lock_irqsave(&mgr->lock, flags);
904 list_for_each_entry(l2, &mgr->layer2, list) {
905 tei_ph_data_ind(l2->tm, mt, &skb->data[4], skb->len - 4);
906 }
907 read_unlock_irqrestore(&mgr->lock, flags);
908 done:
909 return ret;
910 }
911
912 int
913 l2_tei(struct layer2 *l2, u_int cmd, u_long arg)
914 {
915 struct teimgr *tm = l2->tm;
916
917 if (test_bit(FLG_FIXED_TEI, &l2->flag))
918 return 0;
919 if (*debug & DEBUG_L2_TEI)
920 printk(KERN_DEBUG "%s: cmd(%x)\n", __func__, cmd);
921 switch (cmd) {
922 case MDL_ASSIGN_IND:
923 mISDN_FsmEvent(&tm->tei_m, EV_IDREQ, NULL);
924 break;
925 case MDL_ERROR_IND:
926 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
927 mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, &l2->tei);
928 if (test_bit(MGR_OPT_USER, &tm->mgr->options))
929 mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, NULL);
930 break;
931 case MDL_STATUS_UP_IND:
932 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
933 mISDN_FsmEvent(&tm->mgr->deact, EV_ACTIVATE, NULL);
934 break;
935 case MDL_STATUS_DOWN_IND:
936 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
937 mISDN_FsmEvent(&tm->mgr->deact, EV_DEACTIVATE, NULL);
938 break;
939 case MDL_STATUS_UI_IND:
940 if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options))
941 mISDN_FsmEvent(&tm->mgr->deact, EV_UI, NULL);
942 break;
943 }
944 return 0;
945 }
946
947 void
948 TEIrelease(struct layer2 *l2)
949 {
950 struct teimgr *tm = l2->tm;
951 u_long flags;
952
953 mISDN_FsmDelTimer(&tm->timer, 1);
954 write_lock_irqsave(&tm->mgr->lock, flags);
955 list_del(&l2->list);
956 write_unlock_irqrestore(&tm->mgr->lock, flags);
957 l2->tm = NULL;
958 kfree(tm);
959 }
960
961 static int
962 create_teimgr(struct manager *mgr, struct channel_req *crq)
963 {
964 struct layer2 *l2;
965 u_long opt = 0;
966 u_long flags;
967 int id;
968
969 if (*debug & DEBUG_L2_TEI)
970 printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n",
971 __func__, mgr->ch.st->dev->name, crq->protocol,
972 crq->adr.dev, crq->adr.channel, crq->adr.sapi,
973 crq->adr.tei);
974 if (crq->adr.sapi != 0) /* not supported yet */
975 return -EINVAL;
976 if (crq->adr.tei > GROUP_TEI)
977 return -EINVAL;
978 if (crq->adr.tei < 64)
979 test_and_set_bit(OPTION_L2_FIXEDTEI, &opt);
980 if (crq->adr.tei == 0)
981 test_and_set_bit(OPTION_L2_PTP, &opt);
982 if (test_bit(MGR_OPT_NETWORK, &mgr->options)) {
983 if (crq->protocol == ISDN_P_LAPD_TE)
984 return -EPROTONOSUPPORT;
985 if ((crq->adr.tei != 0) && (crq->adr.tei != 127))
986 return -EINVAL;
987 if (mgr->up) {
988 printk(KERN_WARNING
989 "%s: only one network manager is allowed\n",
990 __func__);
991 return -EBUSY;
992 }
993 } else if (test_bit(MGR_OPT_USER, &mgr->options)) {
994 if (crq->protocol == ISDN_P_LAPD_NT)
995 return -EPROTONOSUPPORT;
996 if ((crq->adr.tei >= 64) && (crq->adr.tei < GROUP_TEI))
997 return -EINVAL; /* dyn tei */
998 } else {
999 if (crq->protocol == ISDN_P_LAPD_NT)
1000 test_and_set_bit(MGR_OPT_NETWORK, &mgr->options);
1001 if (crq->protocol == ISDN_P_LAPD_TE)
1002 test_and_set_bit(MGR_OPT_USER, &mgr->options);
1003 }
1004 if (mgr->ch.st->dev->Dprotocols
1005 & ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1)))
1006 test_and_set_bit(OPTION_L2_PMX, &opt);
1007 if ((crq->protocol == ISDN_P_LAPD_NT) && (crq->adr.tei == 127)) {
1008 mgr->up = crq->ch;
1009 id = DL_INFO_L2_CONNECT;
1010 teiup_create(mgr, DL_INFORMATION_IND, sizeof(id), &id);
1011 crq->ch = NULL;
1012 if (!list_empty(&mgr->layer2)) {
1013 read_lock_irqsave(&mgr->lock, flags);
1014 list_for_each_entry(l2, &mgr->layer2, list) {
1015 l2->up = mgr->up;
1016 l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL);
1017 }
1018 read_unlock_irqrestore(&mgr->lock, flags);
1019 }
1020 return 0;
1021 }
1022 l2 = create_l2(crq->ch, crq->protocol, (u_int)opt,
1023 (u_long)crq->adr.tei);
1024 if (!l2)
1025 return -ENOMEM;
1026 l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL);
1027 if (!l2->tm) {
1028 kfree(l2);
1029 printk(KERN_ERR "kmalloc teimgr failed\n");
1030 return -ENOMEM;
1031 }
1032 l2->tm->mgr = mgr;
1033 l2->tm->l2 = l2;
1034 l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM;
1035 l2->tm->tei_m.userdata = l2->tm;
1036 l2->tm->tei_m.printdebug = tei_debug;
1037 if (crq->protocol == ISDN_P_LAPD_TE) {
1038 l2->tm->tei_m.fsm = &teifsmu;
1039 l2->tm->tei_m.state = ST_TEI_NOP;
1040 l2->tm->tval = 1000; /* T201 1 sec */
1041 } else {
1042 l2->tm->tei_m.fsm = &teifsmn;
1043 l2->tm->tei_m.state = ST_TEI_NOP;
1044 l2->tm->tval = 2000; /* T202 2 sec */
1045 }
1046 mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer);
1047 write_lock_irqsave(&mgr->lock, flags);
1048 id = get_free_id(mgr);
1049 list_add_tail(&l2->list, &mgr->layer2);
1050 write_unlock_irqrestore(&mgr->lock, flags);
1051 if (id < 0) {
1052 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1053 } else {
1054 l2->ch.nr = id;
1055 l2->up->nr = id;
1056 crq->ch = &l2->ch;
1057 id = 0;
1058 }
1059 return id;
1060 }
1061
1062 static int
1063 mgr_send(struct mISDNchannel *ch, struct sk_buff *skb)
1064 {
1065 struct manager *mgr;
1066 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1067 int ret = -EINVAL;
1068
1069 mgr = container_of(ch, struct manager, ch);
1070 if (*debug & DEBUG_L2_RECV)
1071 printk(KERN_DEBUG "%s: prim(%x) id(%x)\n",
1072 __func__, hh->prim, hh->id);
1073 switch (hh->prim) {
1074 case PH_DATA_IND:
1075 mISDN_FsmEvent(&mgr->deact, EV_UI, NULL);
1076 ret = ph_data_ind(mgr, skb);
1077 break;
1078 case PH_DATA_CNF:
1079 do_ack(mgr, hh->id);
1080 ret = 0;
1081 break;
1082 case PH_ACTIVATE_IND:
1083 test_and_set_bit(MGR_PH_ACTIVE, &mgr->options);
1084 mISDN_FsmEvent(&mgr->deact, EV_ACTIVATE_IND, NULL);
1085 do_send(mgr);
1086 ret = 0;
1087 break;
1088 case PH_DEACTIVATE_IND:
1089 test_and_clear_bit(MGR_PH_ACTIVE, &mgr->options);
1090 mISDN_FsmEvent(&mgr->deact, EV_DEACTIVATE_IND, NULL);
1091 ret = 0;
1092 break;
1093 case DL_UNITDATA_REQ:
1094 return dl_unit_data(mgr, skb);
1095 }
1096 if (!ret)
1097 dev_kfree_skb(skb);
1098 return ret;
1099 }
1100
1101 static int
1102 free_teimanager(struct manager *mgr)
1103 {
1104 struct layer2 *l2, *nl2;
1105
1106 if (test_bit(MGR_OPT_NETWORK, &mgr->options)) {
1107 /* not locked lock is taken in release tei */
1108 mgr->up = NULL;
1109 if (test_bit(OPTION_L2_CLEANUP, &mgr->options)) {
1110 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1111 put_tei_msg(mgr, ID_REMOVE, 0, l2->tei);
1112 mutex_lock(&mgr->ch.st->lmutex);
1113 list_del(&l2->ch.list);
1114 mutex_unlock(&mgr->ch.st->lmutex);
1115 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1116 }
1117 test_and_clear_bit(MGR_OPT_NETWORK, &mgr->options);
1118 } else {
1119 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1120 l2->up = NULL;
1121 }
1122 }
1123 }
1124 if (test_bit(MGR_OPT_USER, &mgr->options)) {
1125 if (list_empty(&mgr->layer2))
1126 test_and_clear_bit(MGR_OPT_USER, &mgr->options);
1127 }
1128 mgr->ch.st->dev->D.ctrl(&mgr->ch.st->dev->D, CLOSE_CHANNEL, NULL);
1129 return 0;
1130 }
1131
1132 static int
1133 ctrl_teimanager(struct manager *mgr, void *arg)
1134 {
1135 /* currently we only have one option */
1136 int clean = *((int *)arg);
1137
1138 if (clean)
1139 test_and_set_bit(OPTION_L2_CLEANUP, &mgr->options);
1140 else
1141 test_and_clear_bit(OPTION_L2_CLEANUP, &mgr->options);
1142 return 0;
1143 }
1144
1145 /* This function does create a L2 for fixed TEI in NT Mode */
1146 static int
1147 check_data(struct manager *mgr, struct sk_buff *skb)
1148 {
1149 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1150 int ret, tei;
1151 struct layer2 *l2;
1152
1153 if (*debug & DEBUG_L2_CTRL)
1154 printk(KERN_DEBUG "%s: prim(%x) id(%x)\n",
1155 __func__, hh->prim, hh->id);
1156 if (test_bit(MGR_OPT_USER, &mgr->options))
1157 return -ENOTCONN;
1158 if (hh->prim != PH_DATA_IND)
1159 return -ENOTCONN;
1160 if (skb->len != 3)
1161 return -ENOTCONN;
1162 if (skb->data[0] != 0)
1163 /* only SAPI 0 command */
1164 return -ENOTCONN;
1165 if (!(skb->data[1] & 1)) /* invalid EA1 */
1166 return -EINVAL;
1167 tei = skb->data[1] >> 0;
1168 if (tei > 63) /* not a fixed tei */
1169 return -ENOTCONN;
1170 if ((skb->data[2] & ~0x10) != SABME)
1171 return -ENOTCONN;
1172 /* We got a SABME for a fixed TEI */
1173 l2 = create_new_tei(mgr, tei);
1174 if (!l2)
1175 return -ENOMEM;
1176 ret = l2->ch.send(&l2->ch, skb);
1177 return ret;
1178 }
1179
1180 void
1181 delete_teimanager(struct mISDNchannel *ch)
1182 {
1183 struct manager *mgr;
1184 struct layer2 *l2, *nl2;
1185
1186 mgr = container_of(ch, struct manager, ch);
1187 /* not locked lock is taken in release tei */
1188 list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) {
1189 mutex_lock(&mgr->ch.st->lmutex);
1190 list_del(&l2->ch.list);
1191 mutex_unlock(&mgr->ch.st->lmutex);
1192 l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL);
1193 }
1194 list_del(&mgr->ch.list);
1195 list_del(&mgr->bcast.list);
1196 skb_queue_purge(&mgr->sendq);
1197 kfree(mgr);
1198 }
1199
1200 static int
1201 mgr_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1202 {
1203 struct manager *mgr;
1204 int ret = -EINVAL;
1205
1206 mgr = container_of(ch, struct manager, ch);
1207 if (*debug & DEBUG_L2_CTRL)
1208 printk(KERN_DEBUG "%s(%x, %p)\n", __func__, cmd, arg);
1209 switch (cmd) {
1210 case OPEN_CHANNEL:
1211 ret = create_teimgr(mgr, arg);
1212 break;
1213 case CLOSE_CHANNEL:
1214 ret = free_teimanager(mgr);
1215 break;
1216 case CONTROL_CHANNEL:
1217 ret = ctrl_teimanager(mgr, arg);
1218 break;
1219 case CHECK_DATA:
1220 ret = check_data(mgr, arg);
1221 break;
1222 }
1223 return ret;
1224 }
1225
1226 static int
1227 mgr_bcast(struct mISDNchannel *ch, struct sk_buff *skb)
1228 {
1229 struct manager *mgr = container_of(ch, struct manager, bcast);
1230 struct mISDNhead *hh = mISDN_HEAD_P(skb);
1231 struct sk_buff *cskb = NULL;
1232 struct layer2 *l2;
1233 u_long flags;
1234 int ret;
1235
1236 read_lock_irqsave(&mgr->lock, flags);
1237 list_for_each_entry(l2, &mgr->layer2, list) {
1238 if ((hh->id & MISDN_ID_SAPI_MASK) ==
1239 (l2->ch.addr & MISDN_ID_SAPI_MASK)) {
1240 if (list_is_last(&l2->list, &mgr->layer2)) {
1241 cskb = skb;
1242 skb = NULL;
1243 } else {
1244 if (!cskb)
1245 cskb = skb_copy(skb, GFP_KERNEL);
1246 }
1247 if (cskb) {
1248 ret = l2->ch.send(&l2->ch, cskb);
1249 if (ret) {
1250 if (*debug & DEBUG_SEND_ERR)
1251 printk(KERN_DEBUG
1252 "%s ch%d prim(%x) addr(%x)"
1253 " err %d\n",
1254 __func__, l2->ch.nr,
1255 hh->prim, l2->ch.addr, ret);
1256 } else
1257 cskb = NULL;
1258 } else {
1259 printk(KERN_WARNING "%s ch%d addr %x no mem\n",
1260 __func__, ch->nr, ch->addr);
1261 goto out;
1262 }
1263 }
1264 }
1265 out:
1266 read_unlock_irqrestore(&mgr->lock, flags);
1267 if (cskb)
1268 dev_kfree_skb(cskb);
1269 if (skb)
1270 dev_kfree_skb(skb);
1271 return 0;
1272 }
1273
1274 static int
1275 mgr_bcast_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
1276 {
1277
1278 return -EINVAL;
1279 }
1280
1281 int
1282 create_teimanager(struct mISDNdevice *dev)
1283 {
1284 struct manager *mgr;
1285
1286 mgr = kzalloc(sizeof(struct manager), GFP_KERNEL);
1287 if (!mgr)
1288 return -ENOMEM;
1289 INIT_LIST_HEAD(&mgr->layer2);
1290 mgr->lock = __RW_LOCK_UNLOCKED(mgr->lock);
1291 skb_queue_head_init(&mgr->sendq);
1292 mgr->nextid = 1;
1293 mgr->lastid = MISDN_ID_NONE;
1294 mgr->ch.send = mgr_send;
1295 mgr->ch.ctrl = mgr_ctrl;
1296 mgr->ch.st = dev->D.st;
1297 set_channel_address(&mgr->ch, TEI_SAPI, GROUP_TEI);
1298 add_layer2(&mgr->ch, dev->D.st);
1299 mgr->bcast.send = mgr_bcast;
1300 mgr->bcast.ctrl = mgr_bcast_ctrl;
1301 mgr->bcast.st = dev->D.st;
1302 set_channel_address(&mgr->bcast, 0, GROUP_TEI);
1303 add_layer2(&mgr->bcast, dev->D.st);
1304 mgr->deact.debug = *debug & DEBUG_MANAGER;
1305 mgr->deact.userdata = mgr;
1306 mgr->deact.printdebug = da_debug;
1307 mgr->deact.fsm = &deactfsm;
1308 mgr->deact.state = ST_L1_DEACT;
1309 mISDN_FsmInitTimer(&mgr->deact, &mgr->datimer);
1310 dev->teimgr = &mgr->ch;
1311 return 0;
1312 }
1313
1314 int TEIInit(u_int *deb)
1315 {
1316 debug = deb;
1317 teifsmu.state_count = TEI_STATE_COUNT;
1318 teifsmu.event_count = TEI_EVENT_COUNT;
1319 teifsmu.strEvent = strTeiEvent;
1320 teifsmu.strState = strTeiState;
1321 mISDN_FsmNew(&teifsmu, TeiFnListUser, ARRAY_SIZE(TeiFnListUser));
1322 teifsmn.state_count = TEI_STATE_COUNT;
1323 teifsmn.event_count = TEI_EVENT_COUNT;
1324 teifsmn.strEvent = strTeiEvent;
1325 teifsmn.strState = strTeiState;
1326 mISDN_FsmNew(&teifsmn, TeiFnListNet, ARRAY_SIZE(TeiFnListNet));
1327 deactfsm.state_count = DEACT_STATE_COUNT;
1328 deactfsm.event_count = DEACT_EVENT_COUNT;
1329 deactfsm.strEvent = strDeactEvent;
1330 deactfsm.strState = strDeactState;
1331 mISDN_FsmNew(&deactfsm, DeactFnList, ARRAY_SIZE(DeactFnList));
1332 return 0;
1333 }
1334
1335 void TEIFree(void)
1336 {
1337 mISDN_FsmFree(&teifsmu);
1338 mISDN_FsmFree(&teifsmn);
1339 mISDN_FsmFree(&deactfsm);
1340 }
Linux branches of Pieter du Preez