1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * |
4 | * Author Karsten Keil <kkeil@novell.com> |
5 | * |
6 | * Copyright 2008 by Karsten Keil <kkeil@novell.com> |
7 | */ |
8 | #include "layer2.h" |
9 | #include <linux/random.h> |
10 | #include <linux/slab.h> |
11 | #include "core.h" |
12 | |
13 | #define ID_REQUEST 1 |
14 | #define ID_ASSIGNED 2 |
15 | #define ID_DENIED 3 |
16 | #define ID_CHK_REQ 4 |
17 | #define ID_CHK_RES 5 |
18 | #define ID_REMOVE 6 |
19 | #define ID_VERIFY 7 |
20 | |
21 | #define TEI_ENTITY_ID 0xf |
22 | |
23 | #define MGR_PH_ACTIVE 16 |
24 | #define MGR_PH_NOTREADY 17 |
25 | |
26 | #define DATIMER_VAL 10000 |
27 | |
28 | static u_int *debug; |
29 | |
30 | static struct Fsm deactfsm = {NULL, 0, 0, NULL, NULL}; |
31 | static struct Fsm teifsmu = {NULL, 0, 0, NULL, NULL}; |
32 | static struct Fsm teifsmn = {NULL, 0, 0, NULL, NULL}; |
33 | |
34 | enum { |
35 | ST_L1_DEACT, |
36 | ST_L1_DEACT_PENDING, |
37 | ST_L1_ACTIV, |
38 | }; |
39 | #define DEACT_STATE_COUNT (ST_L1_ACTIV + 1) |
40 | |
41 | static char *strDeactState[] = |
42 | { |
43 | "ST_L1_DEACT" , |
44 | "ST_L1_DEACT_PENDING" , |
45 | "ST_L1_ACTIV" , |
46 | }; |
47 | |
48 | enum { |
49 | EV_ACTIVATE, |
50 | EV_ACTIVATE_IND, |
51 | EV_DEACTIVATE, |
52 | EV_DEACTIVATE_IND, |
53 | EV_UI, |
54 | EV_DATIMER, |
55 | }; |
56 | |
57 | #define DEACT_EVENT_COUNT (EV_DATIMER + 1) |
58 | |
59 | static char *strDeactEvent[] = |
60 | { |
61 | "EV_ACTIVATE" , |
62 | "EV_ACTIVATE_IND" , |
63 | "EV_DEACTIVATE" , |
64 | "EV_DEACTIVATE_IND" , |
65 | "EV_UI" , |
66 | "EV_DATIMER" , |
67 | }; |
68 | |
69 | static void |
70 | da_debug(struct FsmInst *fi, char *fmt, ...) |
71 | { |
72 | struct manager *mgr = fi->userdata; |
73 | struct va_format vaf; |
74 | va_list va; |
75 | |
76 | if (!(*debug & DEBUG_L2_TEIFSM)) |
77 | return; |
78 | |
79 | va_start(va, fmt); |
80 | |
81 | vaf.fmt = fmt; |
82 | vaf.va = &va; |
83 | |
84 | printk(KERN_DEBUG "mgr(%d): %pV\n" , mgr->ch.st->dev->id, &vaf); |
85 | |
86 | va_end(va); |
87 | } |
88 | |
89 | static void |
90 | da_activate(struct FsmInst *fi, int event, void *arg) |
91 | { |
92 | struct manager *mgr = fi->userdata; |
93 | |
94 | if (fi->state == ST_L1_DEACT_PENDING) |
95 | mISDN_FsmDelTimer(&mgr->datimer, 1); |
96 | mISDN_FsmChangeState(fi, ST_L1_ACTIV); |
97 | } |
98 | |
99 | static void |
100 | da_deactivate_ind(struct FsmInst *fi, int event, void *arg) |
101 | { |
102 | mISDN_FsmChangeState(fi, ST_L1_DEACT); |
103 | } |
104 | |
105 | static void |
106 | da_deactivate(struct FsmInst *fi, int event, void *arg) |
107 | { |
108 | struct manager *mgr = fi->userdata; |
109 | struct layer2 *l2; |
110 | u_long flags; |
111 | |
112 | read_lock_irqsave(&mgr->lock, flags); |
113 | list_for_each_entry(l2, &mgr->layer2, list) { |
114 | if (l2->l2m.state > ST_L2_4) { |
115 | /* have still activ TEI */ |
116 | read_unlock_irqrestore(&mgr->lock, flags); |
117 | return; |
118 | } |
119 | } |
120 | read_unlock_irqrestore(&mgr->lock, flags); |
121 | /* All TEI are inactiv */ |
122 | if (!test_bit(OPTION_L1_HOLD, &mgr->options)) { |
123 | mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER, |
124 | NULL, 1); |
125 | mISDN_FsmChangeState(fi, ST_L1_DEACT_PENDING); |
126 | } |
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 | if (!test_bit(OPTION_L1_HOLD, &mgr->options)) { |
136 | mISDN_FsmDelTimer(&mgr->datimer, 2); |
137 | mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER, |
138 | NULL, 2); |
139 | } |
140 | } |
141 | |
142 | static void |
143 | da_timer(struct FsmInst *fi, int event, void *arg) |
144 | { |
145 | struct manager *mgr = fi->userdata; |
146 | struct layer2 *l2; |
147 | u_long flags; |
148 | |
149 | /* check again */ |
150 | read_lock_irqsave(&mgr->lock, flags); |
151 | list_for_each_entry(l2, &mgr->layer2, list) { |
152 | if (l2->l2m.state > ST_L2_4) { |
153 | /* have still activ TEI */ |
154 | read_unlock_irqrestore(&mgr->lock, flags); |
155 | mISDN_FsmChangeState(fi, ST_L1_ACTIV); |
156 | return; |
157 | } |
158 | } |
159 | read_unlock_irqrestore(&mgr->lock, flags); |
160 | /* All TEI are inactiv */ |
161 | mISDN_FsmChangeState(fi, ST_L1_DEACT); |
162 | _queue_data(ch: &mgr->ch, PH_DEACTIVATE_REQ, MISDN_ID_ANY, len: 0, NULL, |
163 | GFP_ATOMIC); |
164 | } |
165 | |
166 | static struct FsmNode DeactFnList[] = |
167 | { |
168 | {ST_L1_DEACT, EV_ACTIVATE_IND, da_activate}, |
169 | {ST_L1_ACTIV, EV_DEACTIVATE_IND, da_deactivate_ind}, |
170 | {ST_L1_ACTIV, EV_DEACTIVATE, da_deactivate}, |
171 | {ST_L1_DEACT_PENDING, EV_ACTIVATE, da_activate}, |
172 | {ST_L1_DEACT_PENDING, EV_UI, da_ui}, |
173 | {ST_L1_DEACT_PENDING, EV_DATIMER, da_timer}, |
174 | }; |
175 | |
176 | enum { |
177 | ST_TEI_NOP, |
178 | ST_TEI_IDREQ, |
179 | ST_TEI_IDVERIFY, |
180 | }; |
181 | |
182 | #define TEI_STATE_COUNT (ST_TEI_IDVERIFY + 1) |
183 | |
184 | static char *strTeiState[] = |
185 | { |
186 | "ST_TEI_NOP" , |
187 | "ST_TEI_IDREQ" , |
188 | "ST_TEI_IDVERIFY" , |
189 | }; |
190 | |
191 | enum { |
192 | EV_IDREQ, |
193 | EV_ASSIGN, |
194 | EV_ASSIGN_REQ, |
195 | EV_DENIED, |
196 | EV_CHKREQ, |
197 | EV_CHKRESP, |
198 | EV_REMOVE, |
199 | EV_VERIFY, |
200 | EV_TIMER, |
201 | }; |
202 | |
203 | #define TEI_EVENT_COUNT (EV_TIMER + 1) |
204 | |
205 | static char *strTeiEvent[] = |
206 | { |
207 | "EV_IDREQ" , |
208 | "EV_ASSIGN" , |
209 | "EV_ASSIGN_REQ" , |
210 | "EV_DENIED" , |
211 | "EV_CHKREQ" , |
212 | "EV_CHKRESP" , |
213 | "EV_REMOVE" , |
214 | "EV_VERIFY" , |
215 | "EV_TIMER" , |
216 | }; |
217 | |
218 | static void |
219 | tei_debug(struct FsmInst *fi, char *fmt, ...) |
220 | { |
221 | struct teimgr *tm = fi->userdata; |
222 | struct va_format vaf; |
223 | va_list va; |
224 | |
225 | if (!(*debug & DEBUG_L2_TEIFSM)) |
226 | return; |
227 | |
228 | va_start(va, fmt); |
229 | |
230 | vaf.fmt = fmt; |
231 | vaf.va = &va; |
232 | |
233 | printk(KERN_DEBUG "sapi(%d) tei(%d): %pV\n" , |
234 | tm->l2->sapi, tm->l2->tei, &vaf); |
235 | |
236 | va_end(va); |
237 | } |
238 | |
239 | |
240 | |
241 | static int |
242 | get_free_id(struct manager *mgr) |
243 | { |
244 | DECLARE_BITMAP(ids, 64) = { [0 ... BITS_TO_LONGS(64) - 1] = 0 }; |
245 | int i; |
246 | struct layer2 *l2; |
247 | |
248 | list_for_each_entry(l2, &mgr->layer2, list) { |
249 | if (l2->ch.nr > 63) { |
250 | printk(KERN_WARNING |
251 | "%s: more as 63 layer2 for one device\n" , |
252 | __func__); |
253 | return -EBUSY; |
254 | } |
255 | __set_bit(l2->ch.nr, ids); |
256 | } |
257 | i = find_next_zero_bit(addr: ids, size: 64, offset: 1); |
258 | if (i < 64) |
259 | return i; |
260 | printk(KERN_WARNING "%s: more as 63 layer2 for one device\n" , |
261 | __func__); |
262 | return -EBUSY; |
263 | } |
264 | |
265 | static int |
266 | get_free_tei(struct manager *mgr) |
267 | { |
268 | DECLARE_BITMAP(ids, 64) = { [0 ... BITS_TO_LONGS(64) - 1] = 0 }; |
269 | int i; |
270 | struct layer2 *l2; |
271 | |
272 | list_for_each_entry(l2, &mgr->layer2, list) { |
273 | if (l2->ch.nr == 0) |
274 | continue; |
275 | if ((l2->ch.addr & 0xff) != 0) |
276 | continue; |
277 | i = l2->ch.addr >> 8; |
278 | if (i < 64) |
279 | continue; |
280 | i -= 64; |
281 | |
282 | __set_bit(i, ids); |
283 | } |
284 | i = find_first_zero_bit(addr: ids, size: 64); |
285 | if (i < 64) |
286 | return i + 64; |
287 | printk(KERN_WARNING "%s: more as 63 dynamic tei for one device\n" , |
288 | __func__); |
289 | return -1; |
290 | } |
291 | |
292 | static void |
293 | teiup_create(struct manager *mgr, u_int prim, int len, void *arg) |
294 | { |
295 | struct sk_buff *skb; |
296 | struct mISDNhead *hh; |
297 | int err; |
298 | |
299 | skb = mI_alloc_skb(len, GFP_ATOMIC); |
300 | if (!skb) |
301 | return; |
302 | hh = mISDN_HEAD_P(skb); |
303 | hh->prim = prim; |
304 | hh->id = (mgr->ch.nr << 16) | mgr->ch.addr; |
305 | if (len) |
306 | skb_put_data(skb, data: arg, len); |
307 | err = mgr->up->send(mgr->up, skb); |
308 | if (err) { |
309 | printk(KERN_WARNING "%s: err=%d\n" , __func__, err); |
310 | dev_kfree_skb(skb); |
311 | } |
312 | } |
313 | |
314 | static u_int |
315 | new_id(struct manager *mgr) |
316 | { |
317 | u_int id; |
318 | |
319 | id = mgr->nextid++; |
320 | if (id == 0x7fff) |
321 | mgr->nextid = 1; |
322 | id <<= 16; |
323 | id |= GROUP_TEI << 8; |
324 | id |= TEI_SAPI; |
325 | return id; |
326 | } |
327 | |
328 | static void |
329 | do_send(struct manager *mgr) |
330 | { |
331 | if (!test_bit(MGR_PH_ACTIVE, &mgr->options)) |
332 | return; |
333 | |
334 | if (!test_and_set_bit(MGR_PH_NOTREADY, addr: &mgr->options)) { |
335 | struct sk_buff *skb = skb_dequeue(list: &mgr->sendq); |
336 | |
337 | if (!skb) { |
338 | test_and_clear_bit(MGR_PH_NOTREADY, addr: &mgr->options); |
339 | return; |
340 | } |
341 | mgr->lastid = mISDN_HEAD_ID(skb); |
342 | mISDN_FsmEvent(&mgr->deact, EV_UI, NULL); |
343 | if (mgr->ch.recv(mgr->ch.peer, skb)) { |
344 | dev_kfree_skb(skb); |
345 | test_and_clear_bit(MGR_PH_NOTREADY, addr: &mgr->options); |
346 | mgr->lastid = MISDN_ID_NONE; |
347 | } |
348 | } |
349 | } |
350 | |
351 | static void |
352 | do_ack(struct manager *mgr, u_int id) |
353 | { |
354 | if (test_bit(MGR_PH_NOTREADY, &mgr->options)) { |
355 | if (id == mgr->lastid) { |
356 | if (test_bit(MGR_PH_ACTIVE, &mgr->options)) { |
357 | struct sk_buff *skb; |
358 | |
359 | skb = skb_dequeue(list: &mgr->sendq); |
360 | if (skb) { |
361 | mgr->lastid = mISDN_HEAD_ID(skb); |
362 | if (!mgr->ch.recv(mgr->ch.peer, skb)) |
363 | return; |
364 | dev_kfree_skb(skb); |
365 | } |
366 | } |
367 | mgr->lastid = MISDN_ID_NONE; |
368 | test_and_clear_bit(MGR_PH_NOTREADY, addr: &mgr->options); |
369 | } |
370 | } |
371 | } |
372 | |
373 | static void |
374 | mgr_send_down(struct manager *mgr, struct sk_buff *skb) |
375 | { |
376 | skb_queue_tail(list: &mgr->sendq, newsk: skb); |
377 | if (!test_bit(MGR_PH_ACTIVE, &mgr->options)) { |
378 | _queue_data(ch: &mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, len: 0, |
379 | NULL, GFP_KERNEL); |
380 | } else { |
381 | do_send(mgr); |
382 | } |
383 | } |
384 | |
385 | static int |
386 | dl_unit_data(struct manager *mgr, struct sk_buff *skb) |
387 | { |
388 | if (!test_bit(MGR_OPT_NETWORK, &mgr->options)) /* only net send UI */ |
389 | return -EINVAL; |
390 | if (!test_bit(MGR_PH_ACTIVE, &mgr->options)) |
391 | _queue_data(ch: &mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, len: 0, |
392 | NULL, GFP_KERNEL); |
393 | skb_push(skb, len: 3); |
394 | skb->data[0] = 0x02; /* SAPI 0 C/R = 1 */ |
395 | skb->data[1] = 0xff; /* TEI 127 */ |
396 | skb->data[2] = UI; /* UI frame */ |
397 | mISDN_HEAD_PRIM(skb) = PH_DATA_REQ; |
398 | mISDN_HEAD_ID(skb) = new_id(mgr); |
399 | skb_queue_tail(list: &mgr->sendq, newsk: skb); |
400 | do_send(mgr); |
401 | return 0; |
402 | } |
403 | |
404 | static unsigned int |
405 | random_ri(void) |
406 | { |
407 | u16 x; |
408 | |
409 | get_random_bytes(buf: &x, len: sizeof(x)); |
410 | return x; |
411 | } |
412 | |
413 | static struct layer2 * |
414 | findtei(struct manager *mgr, int tei) |
415 | { |
416 | struct layer2 *l2; |
417 | u_long flags; |
418 | |
419 | read_lock_irqsave(&mgr->lock, flags); |
420 | list_for_each_entry(l2, &mgr->layer2, list) { |
421 | if ((l2->sapi == 0) && (l2->tei > 0) && |
422 | (l2->tei != GROUP_TEI) && (l2->tei == tei)) |
423 | goto done; |
424 | } |
425 | l2 = NULL; |
426 | done: |
427 | read_unlock_irqrestore(&mgr->lock, flags); |
428 | return l2; |
429 | } |
430 | |
431 | static void |
432 | put_tei_msg(struct manager *mgr, u_char m_id, unsigned int ri, int tei) |
433 | { |
434 | struct sk_buff *skb; |
435 | u_char bp[8]; |
436 | |
437 | bp[0] = (TEI_SAPI << 2); |
438 | if (test_bit(MGR_OPT_NETWORK, &mgr->options)) |
439 | bp[0] |= 2; /* CR:=1 for net command */ |
440 | bp[1] = (GROUP_TEI << 1) | 0x1; |
441 | bp[2] = UI; |
442 | bp[3] = TEI_ENTITY_ID; |
443 | bp[4] = ri >> 8; |
444 | bp[5] = ri & 0xff; |
445 | bp[6] = m_id; |
446 | bp[7] = ((tei << 1) & 0xff) | 1; |
447 | skb = _alloc_mISDN_skb(PH_DATA_REQ, id: new_id(mgr), len: 8, dp: bp, GFP_ATOMIC); |
448 | if (!skb) { |
449 | printk(KERN_WARNING "%s: no skb for tei msg\n" , __func__); |
450 | return; |
451 | } |
452 | mgr_send_down(mgr, skb); |
453 | } |
454 | |
455 | static void |
456 | tei_id_request(struct FsmInst *fi, int event, void *arg) |
457 | { |
458 | struct teimgr *tm = fi->userdata; |
459 | |
460 | if (tm->l2->tei != GROUP_TEI) { |
461 | tm->tei_m.printdebug(&tm->tei_m, |
462 | "assign request for already assigned tei %d" , |
463 | tm->l2->tei); |
464 | return; |
465 | } |
466 | tm->ri = random_ri(); |
467 | if (*debug & DEBUG_L2_TEI) |
468 | tm->tei_m.printdebug(&tm->tei_m, |
469 | "assign request ri %d" , tm->ri); |
470 | put_tei_msg(mgr: tm->mgr, ID_REQUEST, ri: tm->ri, GROUP_TEI); |
471 | mISDN_FsmChangeState(fi, ST_TEI_IDREQ); |
472 | mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 1); |
473 | tm->nval = 3; |
474 | } |
475 | |
476 | static void |
477 | tei_id_assign(struct FsmInst *fi, int event, void *arg) |
478 | { |
479 | struct teimgr *tm = fi->userdata; |
480 | struct layer2 *l2; |
481 | u_char *dp = arg; |
482 | int ri, tei; |
483 | |
484 | ri = ((unsigned int) *dp++ << 8); |
485 | ri += *dp++; |
486 | dp++; |
487 | tei = *dp >> 1; |
488 | if (*debug & DEBUG_L2_TEI) |
489 | tm->tei_m.printdebug(fi, "identity assign ri %d tei %d" , |
490 | ri, tei); |
491 | l2 = findtei(mgr: tm->mgr, tei); |
492 | if (l2) { /* same tei is in use */ |
493 | if (ri != l2->tm->ri) { |
494 | tm->tei_m.printdebug(fi, |
495 | "possible duplicate assignment tei %d" , tei); |
496 | tei_l2(l2, MDL_ERROR_RSP, arg: 0); |
497 | } |
498 | } else if (ri == tm->ri) { |
499 | mISDN_FsmDelTimer(&tm->timer, 1); |
500 | mISDN_FsmChangeState(fi, ST_TEI_NOP); |
501 | tei_l2(tm->l2, MDL_ASSIGN_REQ, arg: tei); |
502 | } |
503 | } |
504 | |
505 | static void |
506 | tei_id_test_dup(struct FsmInst *fi, int event, void *arg) |
507 | { |
508 | struct teimgr *tm = fi->userdata; |
509 | struct layer2 *l2; |
510 | u_char *dp = arg; |
511 | int tei, ri; |
512 | |
513 | ri = ((unsigned int) *dp++ << 8); |
514 | ri += *dp++; |
515 | dp++; |
516 | tei = *dp >> 1; |
517 | if (*debug & DEBUG_L2_TEI) |
518 | tm->tei_m.printdebug(fi, "foreign identity assign ri %d tei %d" , |
519 | ri, tei); |
520 | l2 = findtei(mgr: tm->mgr, tei); |
521 | if (l2) { /* same tei is in use */ |
522 | if (ri != l2->tm->ri) { /* and it wasn't our request */ |
523 | tm->tei_m.printdebug(fi, |
524 | "possible duplicate assignment tei %d" , tei); |
525 | mISDN_FsmEvent(&l2->tm->tei_m, EV_VERIFY, NULL); |
526 | } |
527 | } |
528 | } |
529 | |
530 | static void |
531 | tei_id_denied(struct FsmInst *fi, int event, void *arg) |
532 | { |
533 | struct teimgr *tm = fi->userdata; |
534 | u_char *dp = arg; |
535 | int ri, tei; |
536 | |
537 | ri = ((unsigned int) *dp++ << 8); |
538 | ri += *dp++; |
539 | dp++; |
540 | tei = *dp >> 1; |
541 | if (*debug & DEBUG_L2_TEI) |
542 | tm->tei_m.printdebug(fi, "identity denied ri %d tei %d" , |
543 | ri, tei); |
544 | } |
545 | |
546 | static void |
547 | tei_id_chk_req(struct FsmInst *fi, int event, void *arg) |
548 | { |
549 | struct teimgr *tm = fi->userdata; |
550 | u_char *dp = arg; |
551 | int tei; |
552 | |
553 | tei = *(dp + 3) >> 1; |
554 | if (*debug & DEBUG_L2_TEI) |
555 | tm->tei_m.printdebug(fi, "identity check req tei %d" , tei); |
556 | if ((tm->l2->tei != GROUP_TEI) && ((tei == GROUP_TEI) || |
557 | (tei == tm->l2->tei))) { |
558 | mISDN_FsmDelTimer(&tm->timer, 4); |
559 | mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP); |
560 | put_tei_msg(mgr: tm->mgr, ID_CHK_RES, ri: random_ri(), tei: tm->l2->tei); |
561 | } |
562 | } |
563 | |
564 | static void |
565 | tei_id_remove(struct FsmInst *fi, int event, void *arg) |
566 | { |
567 | struct teimgr *tm = fi->userdata; |
568 | u_char *dp = arg; |
569 | int tei; |
570 | |
571 | tei = *(dp + 3) >> 1; |
572 | if (*debug & DEBUG_L2_TEI) |
573 | tm->tei_m.printdebug(fi, "identity remove tei %d" , tei); |
574 | if ((tm->l2->tei != GROUP_TEI) && |
575 | ((tei == GROUP_TEI) || (tei == tm->l2->tei))) { |
576 | mISDN_FsmDelTimer(&tm->timer, 5); |
577 | mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP); |
578 | tei_l2(tm->l2, MDL_REMOVE_REQ, arg: 0); |
579 | } |
580 | } |
581 | |
582 | static void |
583 | tei_id_verify(struct FsmInst *fi, int event, void *arg) |
584 | { |
585 | struct teimgr *tm = fi->userdata; |
586 | |
587 | if (*debug & DEBUG_L2_TEI) |
588 | tm->tei_m.printdebug(fi, "id verify request for tei %d" , |
589 | tm->l2->tei); |
590 | put_tei_msg(mgr: tm->mgr, ID_VERIFY, ri: 0, tei: tm->l2->tei); |
591 | mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY); |
592 | mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2); |
593 | tm->nval = 2; |
594 | } |
595 | |
596 | static void |
597 | tei_id_req_tout(struct FsmInst *fi, int event, void *arg) |
598 | { |
599 | struct teimgr *tm = fi->userdata; |
600 | |
601 | if (--tm->nval) { |
602 | tm->ri = random_ri(); |
603 | if (*debug & DEBUG_L2_TEI) |
604 | tm->tei_m.printdebug(fi, "assign req(%d) ri %d" , |
605 | 4 - tm->nval, tm->ri); |
606 | put_tei_msg(mgr: tm->mgr, ID_REQUEST, ri: tm->ri, GROUP_TEI); |
607 | mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 3); |
608 | } else { |
609 | tm->tei_m.printdebug(fi, "assign req failed" ); |
610 | tei_l2(tm->l2, MDL_ERROR_RSP, arg: 0); |
611 | mISDN_FsmChangeState(fi, ST_TEI_NOP); |
612 | } |
613 | } |
614 | |
615 | static void |
616 | tei_id_ver_tout(struct FsmInst *fi, int event, void *arg) |
617 | { |
618 | struct teimgr *tm = fi->userdata; |
619 | |
620 | if (--tm->nval) { |
621 | if (*debug & DEBUG_L2_TEI) |
622 | tm->tei_m.printdebug(fi, |
623 | "id verify req(%d) for tei %d" , |
624 | 3 - tm->nval, tm->l2->tei); |
625 | put_tei_msg(mgr: tm->mgr, ID_VERIFY, ri: 0, tei: tm->l2->tei); |
626 | mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4); |
627 | } else { |
628 | tm->tei_m.printdebug(fi, "verify req for tei %d failed" , |
629 | tm->l2->tei); |
630 | tei_l2(tm->l2, MDL_REMOVE_REQ, arg: 0); |
631 | mISDN_FsmChangeState(fi, ST_TEI_NOP); |
632 | } |
633 | } |
634 | |
635 | static struct FsmNode TeiFnListUser[] = |
636 | { |
637 | {ST_TEI_NOP, EV_IDREQ, tei_id_request}, |
638 | {ST_TEI_NOP, EV_ASSIGN, tei_id_test_dup}, |
639 | {ST_TEI_NOP, EV_VERIFY, tei_id_verify}, |
640 | {ST_TEI_NOP, EV_REMOVE, tei_id_remove}, |
641 | {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req}, |
642 | {ST_TEI_IDREQ, EV_TIMER, tei_id_req_tout}, |
643 | {ST_TEI_IDREQ, EV_ASSIGN, tei_id_assign}, |
644 | {ST_TEI_IDREQ, EV_DENIED, tei_id_denied}, |
645 | {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout}, |
646 | {ST_TEI_IDVERIFY, EV_REMOVE, tei_id_remove}, |
647 | {ST_TEI_IDVERIFY, EV_CHKREQ, tei_id_chk_req}, |
648 | }; |
649 | |
650 | static void |
651 | tei_l2remove(struct layer2 *l2) |
652 | { |
653 | put_tei_msg(mgr: l2->tm->mgr, ID_REMOVE, ri: 0, tei: l2->tei); |
654 | tei_l2(l2, MDL_REMOVE_REQ, arg: 0); |
655 | list_del(entry: &l2->ch.list); |
656 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); |
657 | } |
658 | |
659 | static void |
660 | tei_assign_req(struct FsmInst *fi, int event, void *arg) |
661 | { |
662 | struct teimgr *tm = fi->userdata; |
663 | u_char *dp = arg; |
664 | |
665 | if (tm->l2->tei == GROUP_TEI) { |
666 | tm->tei_m.printdebug(&tm->tei_m, |
667 | "net tei assign request without tei" ); |
668 | return; |
669 | } |
670 | tm->ri = ((unsigned int) *dp++ << 8); |
671 | tm->ri += *dp++; |
672 | if (*debug & DEBUG_L2_TEI) |
673 | tm->tei_m.printdebug(&tm->tei_m, |
674 | "net assign request ri %d teim %d" , tm->ri, *dp); |
675 | put_tei_msg(mgr: tm->mgr, ID_ASSIGNED, ri: tm->ri, tei: tm->l2->tei); |
676 | mISDN_FsmChangeState(fi, ST_TEI_NOP); |
677 | } |
678 | |
679 | static void |
680 | tei_id_chk_req_net(struct FsmInst *fi, int event, void *arg) |
681 | { |
682 | struct teimgr *tm = fi->userdata; |
683 | |
684 | if (*debug & DEBUG_L2_TEI) |
685 | tm->tei_m.printdebug(fi, "id check request for tei %d" , |
686 | tm->l2->tei); |
687 | tm->rcnt = 0; |
688 | put_tei_msg(mgr: tm->mgr, ID_CHK_REQ, ri: 0, tei: tm->l2->tei); |
689 | mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY); |
690 | mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2); |
691 | tm->nval = 2; |
692 | } |
693 | |
694 | static void |
695 | tei_id_chk_resp(struct FsmInst *fi, int event, void *arg) |
696 | { |
697 | struct teimgr *tm = fi->userdata; |
698 | u_char *dp = arg; |
699 | int tei; |
700 | |
701 | tei = dp[3] >> 1; |
702 | if (*debug & DEBUG_L2_TEI) |
703 | tm->tei_m.printdebug(fi, "identity check resp tei %d" , tei); |
704 | if (tei == tm->l2->tei) |
705 | tm->rcnt++; |
706 | } |
707 | |
708 | static void |
709 | tei_id_verify_net(struct FsmInst *fi, int event, void *arg) |
710 | { |
711 | struct teimgr *tm = fi->userdata; |
712 | u_char *dp = arg; |
713 | int tei; |
714 | |
715 | tei = dp[3] >> 1; |
716 | if (*debug & DEBUG_L2_TEI) |
717 | tm->tei_m.printdebug(fi, "identity verify req tei %d/%d" , |
718 | tei, tm->l2->tei); |
719 | if (tei == tm->l2->tei) |
720 | tei_id_chk_req_net(fi, event, arg); |
721 | } |
722 | |
723 | static void |
724 | tei_id_ver_tout_net(struct FsmInst *fi, int event, void *arg) |
725 | { |
726 | struct teimgr *tm = fi->userdata; |
727 | |
728 | if (tm->rcnt == 1) { |
729 | if (*debug & DEBUG_L2_TEI) |
730 | tm->tei_m.printdebug(fi, |
731 | "check req for tei %d successful\n" , tm->l2->tei); |
732 | mISDN_FsmChangeState(fi, ST_TEI_NOP); |
733 | } else if (tm->rcnt > 1) { |
734 | /* duplicate assignment; remove */ |
735 | tei_l2remove(l2: tm->l2); |
736 | } else if (--tm->nval) { |
737 | if (*debug & DEBUG_L2_TEI) |
738 | tm->tei_m.printdebug(fi, |
739 | "id check req(%d) for tei %d" , |
740 | 3 - tm->nval, tm->l2->tei); |
741 | put_tei_msg(mgr: tm->mgr, ID_CHK_REQ, ri: 0, tei: tm->l2->tei); |
742 | mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4); |
743 | } else { |
744 | tm->tei_m.printdebug(fi, "check req for tei %d failed" , |
745 | tm->l2->tei); |
746 | mISDN_FsmChangeState(fi, ST_TEI_NOP); |
747 | tei_l2remove(l2: tm->l2); |
748 | } |
749 | } |
750 | |
751 | static struct FsmNode TeiFnListNet[] = |
752 | { |
753 | {ST_TEI_NOP, EV_ASSIGN_REQ, tei_assign_req}, |
754 | {ST_TEI_NOP, EV_VERIFY, tei_id_verify_net}, |
755 | {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req_net}, |
756 | {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout_net}, |
757 | {ST_TEI_IDVERIFY, EV_CHKRESP, tei_id_chk_resp}, |
758 | }; |
759 | |
760 | static void |
761 | tei_ph_data_ind(struct teimgr *tm, u_int mt, u_char *dp, int len) |
762 | { |
763 | if (test_bit(FLG_FIXED_TEI, &tm->l2->flag)) |
764 | return; |
765 | if (*debug & DEBUG_L2_TEI) |
766 | tm->tei_m.printdebug(&tm->tei_m, "tei handler mt %x" , mt); |
767 | if (mt == ID_ASSIGNED) |
768 | mISDN_FsmEvent(&tm->tei_m, EV_ASSIGN, dp); |
769 | else if (mt == ID_DENIED) |
770 | mISDN_FsmEvent(&tm->tei_m, EV_DENIED, dp); |
771 | else if (mt == ID_CHK_REQ) |
772 | mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, dp); |
773 | else if (mt == ID_REMOVE) |
774 | mISDN_FsmEvent(&tm->tei_m, EV_REMOVE, dp); |
775 | else if (mt == ID_VERIFY) |
776 | mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, dp); |
777 | else if (mt == ID_CHK_RES) |
778 | mISDN_FsmEvent(&tm->tei_m, EV_CHKRESP, dp); |
779 | } |
780 | |
781 | static struct layer2 * |
782 | create_new_tei(struct manager *mgr, int tei, int sapi) |
783 | { |
784 | unsigned long opt = 0; |
785 | unsigned long flags; |
786 | int id; |
787 | struct layer2 *l2; |
788 | struct channel_req rq; |
789 | |
790 | if (!mgr->up) |
791 | return NULL; |
792 | if ((tei >= 0) && (tei < 64)) |
793 | test_and_set_bit(OPTION_L2_FIXEDTEI, addr: &opt); |
794 | if (mgr->ch.st->dev->Dprotocols & ((1 << ISDN_P_TE_E1) | |
795 | (1 << ISDN_P_NT_E1))) { |
796 | test_and_set_bit(OPTION_L2_PMX, addr: &opt); |
797 | rq.protocol = ISDN_P_NT_E1; |
798 | } else { |
799 | rq.protocol = ISDN_P_NT_S0; |
800 | } |
801 | l2 = create_l2(mgr->up, ISDN_P_LAPD_NT, opt, tei, sapi); |
802 | if (!l2) { |
803 | printk(KERN_WARNING "%s:no memory for layer2\n" , __func__); |
804 | return NULL; |
805 | } |
806 | l2->tm = kzalloc(size: sizeof(struct teimgr), GFP_KERNEL); |
807 | if (!l2->tm) { |
808 | kfree(objp: l2); |
809 | printk(KERN_WARNING "%s:no memory for teimgr\n" , __func__); |
810 | return NULL; |
811 | } |
812 | l2->tm->mgr = mgr; |
813 | l2->tm->l2 = l2; |
814 | l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM; |
815 | l2->tm->tei_m.userdata = l2->tm; |
816 | l2->tm->tei_m.printdebug = tei_debug; |
817 | l2->tm->tei_m.fsm = &teifsmn; |
818 | l2->tm->tei_m.state = ST_TEI_NOP; |
819 | l2->tm->tval = 2000; /* T202 2 sec */ |
820 | mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer); |
821 | write_lock_irqsave(&mgr->lock, flags); |
822 | id = get_free_id(mgr); |
823 | list_add_tail(new: &l2->list, head: &mgr->layer2); |
824 | write_unlock_irqrestore(&mgr->lock, flags); |
825 | if (id < 0) { |
826 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); |
827 | printk(KERN_WARNING "%s:no free id\n" , __func__); |
828 | return NULL; |
829 | } else { |
830 | l2->ch.nr = id; |
831 | __add_layer2(&l2->ch, mgr->ch.st); |
832 | l2->ch.recv = mgr->ch.recv; |
833 | l2->ch.peer = mgr->ch.peer; |
834 | l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL); |
835 | /* We need open here L1 for the manager as well (refcounting) */ |
836 | rq.adr.dev = mgr->ch.st->dev->id; |
837 | id = mgr->ch.st->own.ctrl(&mgr->ch.st->own, OPEN_CHANNEL, &rq); |
838 | if (id < 0) { |
839 | printk(KERN_WARNING "%s: cannot open L1\n" , __func__); |
840 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); |
841 | l2 = NULL; |
842 | } |
843 | } |
844 | return l2; |
845 | } |
846 | |
847 | static void |
848 | new_tei_req(struct manager *mgr, u_char *dp) |
849 | { |
850 | int tei, ri; |
851 | struct layer2 *l2; |
852 | |
853 | ri = dp[0] << 8; |
854 | ri += dp[1]; |
855 | if (!mgr->up) |
856 | goto denied; |
857 | if (!(dp[3] & 1)) /* Extension bit != 1 */ |
858 | goto denied; |
859 | if (dp[3] != 0xff) |
860 | tei = dp[3] >> 1; /* 3GPP TS 08.56 6.1.11.2 */ |
861 | else |
862 | tei = get_free_tei(mgr); |
863 | if (tei < 0) { |
864 | printk(KERN_WARNING "%s:No free tei\n" , __func__); |
865 | goto denied; |
866 | } |
867 | l2 = create_new_tei(mgr, tei, CTRL_SAPI); |
868 | if (!l2) |
869 | goto denied; |
870 | else |
871 | mISDN_FsmEvent(&l2->tm->tei_m, EV_ASSIGN_REQ, dp); |
872 | return; |
873 | denied: |
874 | put_tei_msg(mgr, ID_DENIED, ri, GROUP_TEI); |
875 | } |
876 | |
877 | static int |
878 | ph_data_ind(struct manager *mgr, struct sk_buff *skb) |
879 | { |
880 | int ret = -EINVAL; |
881 | struct layer2 *l2, *nl2; |
882 | u_char mt; |
883 | |
884 | if (skb->len < 8) { |
885 | if (*debug & DEBUG_L2_TEI) |
886 | printk(KERN_DEBUG "%s: short mgr frame %d/8\n" , |
887 | __func__, skb->len); |
888 | goto done; |
889 | } |
890 | |
891 | if ((skb->data[0] >> 2) != TEI_SAPI) /* not for us */ |
892 | goto done; |
893 | if (skb->data[0] & 1) /* EA0 formal error */ |
894 | goto done; |
895 | if (!(skb->data[1] & 1)) /* EA1 formal error */ |
896 | goto done; |
897 | if ((skb->data[1] >> 1) != GROUP_TEI) /* not for us */ |
898 | goto done; |
899 | if ((skb->data[2] & 0xef) != UI) /* not UI */ |
900 | goto done; |
901 | if (skb->data[3] != TEI_ENTITY_ID) /* not tei entity */ |
902 | goto done; |
903 | mt = skb->data[6]; |
904 | switch (mt) { |
905 | case ID_REQUEST: |
906 | case ID_CHK_RES: |
907 | case ID_VERIFY: |
908 | if (!test_bit(MGR_OPT_NETWORK, &mgr->options)) |
909 | goto done; |
910 | break; |
911 | case ID_ASSIGNED: |
912 | case ID_DENIED: |
913 | case ID_CHK_REQ: |
914 | case ID_REMOVE: |
915 | if (test_bit(MGR_OPT_NETWORK, &mgr->options)) |
916 | goto done; |
917 | break; |
918 | default: |
919 | goto done; |
920 | } |
921 | ret = 0; |
922 | if (mt == ID_REQUEST) { |
923 | new_tei_req(mgr, dp: &skb->data[4]); |
924 | goto done; |
925 | } |
926 | list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) { |
927 | tei_ph_data_ind(tm: l2->tm, mt, dp: &skb->data[4], len: skb->len - 4); |
928 | } |
929 | done: |
930 | return ret; |
931 | } |
932 | |
933 | int |
934 | l2_tei(struct layer2 *l2, u_int cmd, u_long arg) |
935 | { |
936 | struct teimgr *tm = l2->tm; |
937 | |
938 | if (test_bit(FLG_FIXED_TEI, &l2->flag)) |
939 | return 0; |
940 | if (*debug & DEBUG_L2_TEI) |
941 | printk(KERN_DEBUG "%s: cmd(%x)\n" , __func__, cmd); |
942 | switch (cmd) { |
943 | case MDL_ASSIGN_IND: |
944 | mISDN_FsmEvent(&tm->tei_m, EV_IDREQ, NULL); |
945 | break; |
946 | case MDL_ERROR_IND: |
947 | if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options)) |
948 | mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, &l2->tei); |
949 | if (test_bit(MGR_OPT_USER, &tm->mgr->options)) |
950 | mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, NULL); |
951 | break; |
952 | case MDL_STATUS_UP_IND: |
953 | if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options)) |
954 | mISDN_FsmEvent(&tm->mgr->deact, EV_ACTIVATE, NULL); |
955 | break; |
956 | case MDL_STATUS_DOWN_IND: |
957 | if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options)) |
958 | mISDN_FsmEvent(&tm->mgr->deact, EV_DEACTIVATE, NULL); |
959 | break; |
960 | case MDL_STATUS_UI_IND: |
961 | if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options)) |
962 | mISDN_FsmEvent(&tm->mgr->deact, EV_UI, NULL); |
963 | break; |
964 | } |
965 | return 0; |
966 | } |
967 | |
968 | void |
969 | TEIrelease(struct layer2 *l2) |
970 | { |
971 | struct teimgr *tm = l2->tm; |
972 | u_long flags; |
973 | |
974 | mISDN_FsmDelTimer(&tm->timer, 1); |
975 | write_lock_irqsave(&tm->mgr->lock, flags); |
976 | list_del(entry: &l2->list); |
977 | write_unlock_irqrestore(&tm->mgr->lock, flags); |
978 | l2->tm = NULL; |
979 | kfree(objp: tm); |
980 | } |
981 | |
982 | static int |
983 | create_teimgr(struct manager *mgr, struct channel_req *crq) |
984 | { |
985 | struct layer2 *l2; |
986 | unsigned long opt = 0; |
987 | unsigned long flags; |
988 | int id; |
989 | struct channel_req l1rq; |
990 | |
991 | if (*debug & DEBUG_L2_TEI) |
992 | printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n" , |
993 | __func__, dev_name(&mgr->ch.st->dev->dev), |
994 | crq->protocol, crq->adr.dev, crq->adr.channel, |
995 | crq->adr.sapi, crq->adr.tei); |
996 | if (crq->adr.tei > GROUP_TEI) |
997 | return -EINVAL; |
998 | if (crq->adr.tei < 64) |
999 | test_and_set_bit(OPTION_L2_FIXEDTEI, addr: &opt); |
1000 | if (crq->adr.tei == 0) |
1001 | test_and_set_bit(OPTION_L2_PTP, addr: &opt); |
1002 | if (test_bit(MGR_OPT_NETWORK, &mgr->options)) { |
1003 | if (crq->protocol == ISDN_P_LAPD_TE) |
1004 | return -EPROTONOSUPPORT; |
1005 | if ((crq->adr.tei != 0) && (crq->adr.tei != 127)) |
1006 | return -EINVAL; |
1007 | if (mgr->up) { |
1008 | printk(KERN_WARNING |
1009 | "%s: only one network manager is allowed\n" , |
1010 | __func__); |
1011 | return -EBUSY; |
1012 | } |
1013 | } else if (test_bit(MGR_OPT_USER, &mgr->options)) { |
1014 | if (crq->protocol == ISDN_P_LAPD_NT) |
1015 | return -EPROTONOSUPPORT; |
1016 | if ((crq->adr.tei >= 64) && (crq->adr.tei < GROUP_TEI)) |
1017 | return -EINVAL; /* dyn tei */ |
1018 | } else { |
1019 | if (crq->protocol == ISDN_P_LAPD_NT) |
1020 | test_and_set_bit(MGR_OPT_NETWORK, addr: &mgr->options); |
1021 | if (crq->protocol == ISDN_P_LAPD_TE) |
1022 | test_and_set_bit(MGR_OPT_USER, addr: &mgr->options); |
1023 | } |
1024 | l1rq.adr = crq->adr; |
1025 | if (mgr->ch.st->dev->Dprotocols |
1026 | & ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1))) |
1027 | test_and_set_bit(OPTION_L2_PMX, addr: &opt); |
1028 | if ((crq->protocol == ISDN_P_LAPD_NT) && (crq->adr.tei == 127)) { |
1029 | mgr->up = crq->ch; |
1030 | id = DL_INFO_L2_CONNECT; |
1031 | teiup_create(mgr, DL_INFORMATION_IND, len: sizeof(id), arg: &id); |
1032 | if (test_bit(MGR_PH_ACTIVE, &mgr->options)) |
1033 | teiup_create(mgr, PH_ACTIVATE_IND, len: 0, NULL); |
1034 | crq->ch = NULL; |
1035 | if (!list_empty(head: &mgr->layer2)) { |
1036 | read_lock_irqsave(&mgr->lock, flags); |
1037 | list_for_each_entry(l2, &mgr->layer2, list) { |
1038 | l2->up = mgr->up; |
1039 | l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL); |
1040 | } |
1041 | read_unlock_irqrestore(&mgr->lock, flags); |
1042 | } |
1043 | return 0; |
1044 | } |
1045 | l2 = create_l2(crq->ch, crq->protocol, opt, |
1046 | crq->adr.tei, crq->adr.sapi); |
1047 | if (!l2) |
1048 | return -ENOMEM; |
1049 | l2->tm = kzalloc(size: sizeof(struct teimgr), GFP_KERNEL); |
1050 | if (!l2->tm) { |
1051 | kfree(objp: l2); |
1052 | printk(KERN_ERR "kmalloc teimgr failed\n" ); |
1053 | return -ENOMEM; |
1054 | } |
1055 | l2->tm->mgr = mgr; |
1056 | l2->tm->l2 = l2; |
1057 | l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM; |
1058 | l2->tm->tei_m.userdata = l2->tm; |
1059 | l2->tm->tei_m.printdebug = tei_debug; |
1060 | if (crq->protocol == ISDN_P_LAPD_TE) { |
1061 | l2->tm->tei_m.fsm = &teifsmu; |
1062 | l2->tm->tei_m.state = ST_TEI_NOP; |
1063 | l2->tm->tval = 1000; /* T201 1 sec */ |
1064 | if (test_bit(OPTION_L2_PMX, &opt)) |
1065 | l1rq.protocol = ISDN_P_TE_E1; |
1066 | else |
1067 | l1rq.protocol = ISDN_P_TE_S0; |
1068 | } else { |
1069 | l2->tm->tei_m.fsm = &teifsmn; |
1070 | l2->tm->tei_m.state = ST_TEI_NOP; |
1071 | l2->tm->tval = 2000; /* T202 2 sec */ |
1072 | if (test_bit(OPTION_L2_PMX, &opt)) |
1073 | l1rq.protocol = ISDN_P_NT_E1; |
1074 | else |
1075 | l1rq.protocol = ISDN_P_NT_S0; |
1076 | } |
1077 | mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer); |
1078 | write_lock_irqsave(&mgr->lock, flags); |
1079 | id = get_free_id(mgr); |
1080 | list_add_tail(new: &l2->list, head: &mgr->layer2); |
1081 | write_unlock_irqrestore(&mgr->lock, flags); |
1082 | if (id >= 0) { |
1083 | l2->ch.nr = id; |
1084 | l2->up->nr = id; |
1085 | crq->ch = &l2->ch; |
1086 | /* We need open here L1 for the manager as well (refcounting) */ |
1087 | id = mgr->ch.st->own.ctrl(&mgr->ch.st->own, OPEN_CHANNEL, |
1088 | &l1rq); |
1089 | } |
1090 | if (id < 0) |
1091 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); |
1092 | return id; |
1093 | } |
1094 | |
1095 | static int |
1096 | mgr_send(struct mISDNchannel *ch, struct sk_buff *skb) |
1097 | { |
1098 | struct manager *mgr; |
1099 | struct mISDNhead *hh = mISDN_HEAD_P(skb); |
1100 | int ret = -EINVAL; |
1101 | |
1102 | mgr = container_of(ch, struct manager, ch); |
1103 | if (*debug & DEBUG_L2_RECV) |
1104 | printk(KERN_DEBUG "%s: prim(%x) id(%x)\n" , |
1105 | __func__, hh->prim, hh->id); |
1106 | switch (hh->prim) { |
1107 | case PH_DATA_IND: |
1108 | mISDN_FsmEvent(&mgr->deact, EV_UI, NULL); |
1109 | ret = ph_data_ind(mgr, skb); |
1110 | break; |
1111 | case PH_DATA_CNF: |
1112 | do_ack(mgr, id: hh->id); |
1113 | ret = 0; |
1114 | break; |
1115 | case PH_ACTIVATE_IND: |
1116 | test_and_set_bit(MGR_PH_ACTIVE, addr: &mgr->options); |
1117 | if (mgr->up) |
1118 | teiup_create(mgr, PH_ACTIVATE_IND, len: 0, NULL); |
1119 | mISDN_FsmEvent(&mgr->deact, EV_ACTIVATE_IND, NULL); |
1120 | do_send(mgr); |
1121 | ret = 0; |
1122 | break; |
1123 | case PH_DEACTIVATE_IND: |
1124 | test_and_clear_bit(MGR_PH_ACTIVE, addr: &mgr->options); |
1125 | if (mgr->up) |
1126 | teiup_create(mgr, PH_DEACTIVATE_IND, len: 0, NULL); |
1127 | mISDN_FsmEvent(&mgr->deact, EV_DEACTIVATE_IND, NULL); |
1128 | ret = 0; |
1129 | break; |
1130 | case DL_UNITDATA_REQ: |
1131 | return dl_unit_data(mgr, skb); |
1132 | } |
1133 | if (!ret) |
1134 | dev_kfree_skb(skb); |
1135 | return ret; |
1136 | } |
1137 | |
1138 | static int |
1139 | free_teimanager(struct manager *mgr) |
1140 | { |
1141 | struct layer2 *l2, *nl2; |
1142 | |
1143 | test_and_clear_bit(OPTION_L1_HOLD, addr: &mgr->options); |
1144 | if (test_bit(MGR_OPT_NETWORK, &mgr->options)) { |
1145 | /* not locked lock is taken in release tei */ |
1146 | mgr->up = NULL; |
1147 | if (test_bit(OPTION_L2_CLEANUP, &mgr->options)) { |
1148 | list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) { |
1149 | put_tei_msg(mgr, ID_REMOVE, ri: 0, tei: l2->tei); |
1150 | mutex_lock(&mgr->ch.st->lmutex); |
1151 | list_del(entry: &l2->ch.list); |
1152 | mutex_unlock(lock: &mgr->ch.st->lmutex); |
1153 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); |
1154 | } |
1155 | test_and_clear_bit(MGR_OPT_NETWORK, addr: &mgr->options); |
1156 | } else { |
1157 | list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) { |
1158 | l2->up = NULL; |
1159 | } |
1160 | } |
1161 | } |
1162 | if (test_bit(MGR_OPT_USER, &mgr->options)) { |
1163 | if (list_empty(head: &mgr->layer2)) |
1164 | test_and_clear_bit(MGR_OPT_USER, addr: &mgr->options); |
1165 | } |
1166 | mgr->ch.st->dev->D.ctrl(&mgr->ch.st->dev->D, CLOSE_CHANNEL, NULL); |
1167 | return 0; |
1168 | } |
1169 | |
1170 | static int |
1171 | ctrl_teimanager(struct manager *mgr, void *arg) |
1172 | { |
1173 | /* currently we only have one option */ |
1174 | unsigned int *val = (unsigned int *)arg; |
1175 | |
1176 | switch (val[0]) { |
1177 | case IMCLEAR_L2: |
1178 | if (val[1]) |
1179 | test_and_set_bit(OPTION_L2_CLEANUP, addr: &mgr->options); |
1180 | else |
1181 | test_and_clear_bit(OPTION_L2_CLEANUP, addr: &mgr->options); |
1182 | break; |
1183 | case IMHOLD_L1: |
1184 | if (val[1]) |
1185 | test_and_set_bit(OPTION_L1_HOLD, addr: &mgr->options); |
1186 | else |
1187 | test_and_clear_bit(OPTION_L1_HOLD, addr: &mgr->options); |
1188 | break; |
1189 | default: |
1190 | return -EINVAL; |
1191 | } |
1192 | return 0; |
1193 | } |
1194 | |
1195 | /* This function does create a L2 for fixed TEI in NT Mode */ |
1196 | static int |
1197 | check_data(struct manager *mgr, struct sk_buff *skb) |
1198 | { |
1199 | struct mISDNhead *hh = mISDN_HEAD_P(skb); |
1200 | int ret, tei, sapi; |
1201 | struct layer2 *l2; |
1202 | |
1203 | if (*debug & DEBUG_L2_CTRL) |
1204 | printk(KERN_DEBUG "%s: prim(%x) id(%x)\n" , |
1205 | __func__, hh->prim, hh->id); |
1206 | if (test_bit(MGR_OPT_USER, &mgr->options)) |
1207 | return -ENOTCONN; |
1208 | if (hh->prim != PH_DATA_IND) |
1209 | return -ENOTCONN; |
1210 | if (skb->len != 3) |
1211 | return -ENOTCONN; |
1212 | if (skb->data[0] & 3) /* EA0 and CR must be 0 */ |
1213 | return -EINVAL; |
1214 | sapi = skb->data[0] >> 2; |
1215 | if (!(skb->data[1] & 1)) /* invalid EA1 */ |
1216 | return -EINVAL; |
1217 | tei = skb->data[1] >> 1; |
1218 | if (tei > 63) /* not a fixed tei */ |
1219 | return -ENOTCONN; |
1220 | if ((skb->data[2] & ~0x10) != SABME) |
1221 | return -ENOTCONN; |
1222 | /* We got a SABME for a fixed TEI */ |
1223 | if (*debug & DEBUG_L2_CTRL) |
1224 | printk(KERN_DEBUG "%s: SABME sapi(%d) tei(%d)\n" , |
1225 | __func__, sapi, tei); |
1226 | l2 = create_new_tei(mgr, tei, sapi); |
1227 | if (!l2) { |
1228 | if (*debug & DEBUG_L2_CTRL) |
1229 | printk(KERN_DEBUG "%s: failed to create new tei\n" , |
1230 | __func__); |
1231 | return -ENOMEM; |
1232 | } |
1233 | ret = l2->ch.send(&l2->ch, skb); |
1234 | return ret; |
1235 | } |
1236 | |
1237 | void |
1238 | delete_teimanager(struct mISDNchannel *ch) |
1239 | { |
1240 | struct manager *mgr; |
1241 | struct layer2 *l2, *nl2; |
1242 | |
1243 | mgr = container_of(ch, struct manager, ch); |
1244 | /* not locked lock is taken in release tei */ |
1245 | list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) { |
1246 | mutex_lock(&mgr->ch.st->lmutex); |
1247 | list_del(entry: &l2->ch.list); |
1248 | mutex_unlock(lock: &mgr->ch.st->lmutex); |
1249 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); |
1250 | } |
1251 | list_del(entry: &mgr->ch.list); |
1252 | list_del(entry: &mgr->bcast.list); |
1253 | skb_queue_purge(list: &mgr->sendq); |
1254 | kfree(objp: mgr); |
1255 | } |
1256 | |
1257 | static int |
1258 | mgr_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) |
1259 | { |
1260 | struct manager *mgr; |
1261 | int ret = -EINVAL; |
1262 | |
1263 | mgr = container_of(ch, struct manager, ch); |
1264 | if (*debug & DEBUG_L2_CTRL) |
1265 | printk(KERN_DEBUG "%s(%x, %p)\n" , __func__, cmd, arg); |
1266 | switch (cmd) { |
1267 | case OPEN_CHANNEL: |
1268 | ret = create_teimgr(mgr, crq: arg); |
1269 | break; |
1270 | case CLOSE_CHANNEL: |
1271 | ret = free_teimanager(mgr); |
1272 | break; |
1273 | case CONTROL_CHANNEL: |
1274 | ret = ctrl_teimanager(mgr, arg); |
1275 | break; |
1276 | case CHECK_DATA: |
1277 | ret = check_data(mgr, skb: arg); |
1278 | break; |
1279 | } |
1280 | return ret; |
1281 | } |
1282 | |
1283 | static int |
1284 | mgr_bcast(struct mISDNchannel *ch, struct sk_buff *skb) |
1285 | { |
1286 | struct manager *mgr = container_of(ch, struct manager, bcast); |
1287 | struct mISDNhead *hhc, *hh = mISDN_HEAD_P(skb); |
1288 | struct sk_buff *cskb = NULL; |
1289 | struct layer2 *l2; |
1290 | u_long flags; |
1291 | int ret; |
1292 | |
1293 | read_lock_irqsave(&mgr->lock, flags); |
1294 | list_for_each_entry(l2, &mgr->layer2, list) { |
1295 | if ((hh->id & MISDN_ID_SAPI_MASK) == |
1296 | (l2->ch.addr & MISDN_ID_SAPI_MASK)) { |
1297 | if (list_is_last(list: &l2->list, head: &mgr->layer2)) { |
1298 | cskb = skb; |
1299 | skb = NULL; |
1300 | } else { |
1301 | if (!cskb) |
1302 | cskb = skb_copy(skb, GFP_ATOMIC); |
1303 | } |
1304 | if (cskb) { |
1305 | hhc = mISDN_HEAD_P(cskb); |
1306 | /* save original header behind normal header */ |
1307 | hhc++; |
1308 | *hhc = *hh; |
1309 | hhc--; |
1310 | hhc->prim = DL_INTERN_MSG; |
1311 | hhc->id = l2->ch.nr; |
1312 | ret = ch->st->own.recv(&ch->st->own, cskb); |
1313 | if (ret) { |
1314 | if (*debug & DEBUG_SEND_ERR) |
1315 | printk(KERN_DEBUG |
1316 | "%s ch%d prim(%x) addr(%x)" |
1317 | " err %d\n" , |
1318 | __func__, l2->ch.nr, |
1319 | hh->prim, l2->ch.addr, ret); |
1320 | } else |
1321 | cskb = NULL; |
1322 | } else { |
1323 | printk(KERN_WARNING "%s ch%d addr %x no mem\n" , |
1324 | __func__, ch->nr, ch->addr); |
1325 | goto out; |
1326 | } |
1327 | } |
1328 | } |
1329 | out: |
1330 | read_unlock_irqrestore(&mgr->lock, flags); |
1331 | dev_kfree_skb(cskb); |
1332 | dev_kfree_skb(skb); |
1333 | return 0; |
1334 | } |
1335 | |
1336 | static int |
1337 | mgr_bcast_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) |
1338 | { |
1339 | |
1340 | return -EINVAL; |
1341 | } |
1342 | |
1343 | int |
1344 | create_teimanager(struct mISDNdevice *dev) |
1345 | { |
1346 | struct manager *mgr; |
1347 | |
1348 | mgr = kzalloc(size: sizeof(struct manager), GFP_KERNEL); |
1349 | if (!mgr) |
1350 | return -ENOMEM; |
1351 | INIT_LIST_HEAD(list: &mgr->layer2); |
1352 | rwlock_init(&mgr->lock); |
1353 | skb_queue_head_init(list: &mgr->sendq); |
1354 | mgr->nextid = 1; |
1355 | mgr->lastid = MISDN_ID_NONE; |
1356 | mgr->ch.send = mgr_send; |
1357 | mgr->ch.ctrl = mgr_ctrl; |
1358 | mgr->ch.st = dev->D.st; |
1359 | set_channel_address(&mgr->ch, TEI_SAPI, GROUP_TEI); |
1360 | add_layer2(&mgr->ch, dev->D.st); |
1361 | mgr->bcast.send = mgr_bcast; |
1362 | mgr->bcast.ctrl = mgr_bcast_ctrl; |
1363 | mgr->bcast.st = dev->D.st; |
1364 | set_channel_address(&mgr->bcast, 0, GROUP_TEI); |
1365 | add_layer2(&mgr->bcast, dev->D.st); |
1366 | mgr->deact.debug = *debug & DEBUG_MANAGER; |
1367 | mgr->deact.userdata = mgr; |
1368 | mgr->deact.printdebug = da_debug; |
1369 | mgr->deact.fsm = &deactfsm; |
1370 | mgr->deact.state = ST_L1_DEACT; |
1371 | mISDN_FsmInitTimer(&mgr->deact, &mgr->datimer); |
1372 | dev->teimgr = &mgr->ch; |
1373 | return 0; |
1374 | } |
1375 | |
1376 | int TEIInit(u_int *deb) |
1377 | { |
1378 | int res; |
1379 | debug = deb; |
1380 | teifsmu.state_count = TEI_STATE_COUNT; |
1381 | teifsmu.event_count = TEI_EVENT_COUNT; |
1382 | teifsmu.strEvent = strTeiEvent; |
1383 | teifsmu.strState = strTeiState; |
1384 | res = mISDN_FsmNew(&teifsmu, TeiFnListUser, ARRAY_SIZE(TeiFnListUser)); |
1385 | if (res) |
1386 | goto error; |
1387 | teifsmn.state_count = TEI_STATE_COUNT; |
1388 | teifsmn.event_count = TEI_EVENT_COUNT; |
1389 | teifsmn.strEvent = strTeiEvent; |
1390 | teifsmn.strState = strTeiState; |
1391 | res = mISDN_FsmNew(&teifsmn, TeiFnListNet, ARRAY_SIZE(TeiFnListNet)); |
1392 | if (res) |
1393 | goto error_smn; |
1394 | deactfsm.state_count = DEACT_STATE_COUNT; |
1395 | deactfsm.event_count = DEACT_EVENT_COUNT; |
1396 | deactfsm.strEvent = strDeactEvent; |
1397 | deactfsm.strState = strDeactState; |
1398 | res = mISDN_FsmNew(&deactfsm, DeactFnList, ARRAY_SIZE(DeactFnList)); |
1399 | if (res) |
1400 | goto error_deact; |
1401 | return 0; |
1402 | |
1403 | error_deact: |
1404 | mISDN_FsmFree(&teifsmn); |
1405 | error_smn: |
1406 | mISDN_FsmFree(&teifsmu); |
1407 | error: |
1408 | return res; |
1409 | } |
1410 | |
1411 | void TEIFree(void) |
1412 | { |
1413 | mISDN_FsmFree(&teifsmu); |
1414 | mISDN_FsmFree(&teifsmn); |
1415 | mISDN_FsmFree(&deactfsm); |
1416 | } |
1417 | |