Commit | Line | Data |
---|---|---|
1b2b03f8 KK |
1 | /* |
2 | * | |
3 | * Author Karsten Keil <kkeil@novell.com> | |
4 | * | |
5 | * Copyright 2008 by Karsten Keil <kkeil@novell.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | */ | |
17 | #include "layer2.h" | |
18 | #include <linux/random.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
1b2b03f8 KK |
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; | |
020f01eb | 82 | struct va_format vaf; |
1b2b03f8 KK |
83 | va_list va; |
84 | ||
85 | if (!(*debug & DEBUG_L2_TEIFSM)) | |
86 | return; | |
020f01eb | 87 | |
1b2b03f8 | 88 | va_start(va, fmt); |
020f01eb JP |
89 | |
90 | vaf.fmt = fmt; | |
91 | vaf.va = &va; | |
92 | ||
93 | printk(KERN_DEBUG "mgr(%d): %pV\n", mgr->ch.st->dev->id, &vaf); | |
94 | ||
1b2b03f8 KK |
95 | va_end(va); |
96 | } | |
97 | ||
98 | static void | |
99 | da_activate(struct FsmInst *fi, int event, void *arg) | |
100 | { | |
101 | struct manager *mgr = fi->userdata; | |
102 | ||
103 | if (fi->state == ST_L1_DEACT_PENDING) | |
104 | mISDN_FsmDelTimer(&mgr->datimer, 1); | |
105 | mISDN_FsmChangeState(fi, ST_L1_ACTIV); | |
106 | } | |
107 | ||
108 | static void | |
109 | da_deactivate_ind(struct FsmInst *fi, int event, void *arg) | |
110 | { | |
111 | mISDN_FsmChangeState(fi, ST_L1_DEACT); | |
112 | } | |
113 | ||
114 | static void | |
115 | da_deactivate(struct FsmInst *fi, int event, void *arg) | |
116 | { | |
117 | struct manager *mgr = fi->userdata; | |
118 | struct layer2 *l2; | |
119 | u_long flags; | |
120 | ||
121 | read_lock_irqsave(&mgr->lock, flags); | |
122 | list_for_each_entry(l2, &mgr->layer2, list) { | |
123 | if (l2->l2m.state > ST_L2_4) { | |
124 | /* have still activ TEI */ | |
125 | read_unlock_irqrestore(&mgr->lock, flags); | |
126 | return; | |
127 | } | |
128 | } | |
129 | read_unlock_irqrestore(&mgr->lock, flags); | |
130 | /* All TEI are inactiv */ | |
e73f6b22 AE |
131 | if (!test_bit(OPTION_L1_HOLD, &mgr->options)) { |
132 | mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER, | |
133 | NULL, 1); | |
134 | mISDN_FsmChangeState(fi, ST_L1_DEACT_PENDING); | |
135 | } | |
1b2b03f8 KK |
136 | } |
137 | ||
138 | static void | |
139 | da_ui(struct FsmInst *fi, int event, void *arg) | |
140 | { | |
141 | struct manager *mgr = fi->userdata; | |
142 | ||
143 | /* restart da timer */ | |
e73f6b22 AE |
144 | if (!test_bit(OPTION_L1_HOLD, &mgr->options)) { |
145 | mISDN_FsmDelTimer(&mgr->datimer, 2); | |
146 | mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER, | |
147 | NULL, 2); | |
148 | } | |
1b2b03f8 KK |
149 | } |
150 | ||
151 | static void | |
152 | da_timer(struct FsmInst *fi, int event, void *arg) | |
153 | { | |
154 | struct manager *mgr = fi->userdata; | |
155 | struct layer2 *l2; | |
156 | u_long flags; | |
157 | ||
158 | /* check again */ | |
159 | read_lock_irqsave(&mgr->lock, flags); | |
160 | list_for_each_entry(l2, &mgr->layer2, list) { | |
161 | if (l2->l2m.state > ST_L2_4) { | |
162 | /* have still activ TEI */ | |
163 | read_unlock_irqrestore(&mgr->lock, flags); | |
164 | mISDN_FsmChangeState(fi, ST_L1_ACTIV); | |
165 | return; | |
166 | } | |
167 | } | |
168 | read_unlock_irqrestore(&mgr->lock, flags); | |
169 | /* All TEI are inactiv */ | |
170 | mISDN_FsmChangeState(fi, ST_L1_DEACT); | |
171 | _queue_data(&mgr->ch, PH_DEACTIVATE_REQ, MISDN_ID_ANY, 0, NULL, | |
172 | GFP_ATOMIC); | |
173 | } | |
174 | ||
175 | static struct FsmNode DeactFnList[] = | |
176 | { | |
177 | {ST_L1_DEACT, EV_ACTIVATE_IND, da_activate}, | |
178 | {ST_L1_ACTIV, EV_DEACTIVATE_IND, da_deactivate_ind}, | |
179 | {ST_L1_ACTIV, EV_DEACTIVATE, da_deactivate}, | |
180 | {ST_L1_DEACT_PENDING, EV_ACTIVATE, da_activate}, | |
181 | {ST_L1_DEACT_PENDING, EV_UI, da_ui}, | |
182 | {ST_L1_DEACT_PENDING, EV_DATIMER, da_timer}, | |
183 | }; | |
184 | ||
185 | enum { | |
186 | ST_TEI_NOP, | |
187 | ST_TEI_IDREQ, | |
188 | ST_TEI_IDVERIFY, | |
189 | }; | |
190 | ||
191 | #define TEI_STATE_COUNT (ST_TEI_IDVERIFY+1) | |
192 | ||
193 | static char *strTeiState[] = | |
194 | { | |
195 | "ST_TEI_NOP", | |
196 | "ST_TEI_IDREQ", | |
197 | "ST_TEI_IDVERIFY", | |
198 | }; | |
199 | ||
200 | enum { | |
201 | EV_IDREQ, | |
202 | EV_ASSIGN, | |
203 | EV_ASSIGN_REQ, | |
204 | EV_DENIED, | |
205 | EV_CHKREQ, | |
206 | EV_CHKRESP, | |
207 | EV_REMOVE, | |
208 | EV_VERIFY, | |
209 | EV_TIMER, | |
210 | }; | |
211 | ||
212 | #define TEI_EVENT_COUNT (EV_TIMER+1) | |
213 | ||
214 | static char *strTeiEvent[] = | |
215 | { | |
216 | "EV_IDREQ", | |
217 | "EV_ASSIGN", | |
218 | "EV_ASSIGN_REQ", | |
219 | "EV_DENIED", | |
220 | "EV_CHKREQ", | |
221 | "EV_CHKRESP", | |
222 | "EV_REMOVE", | |
223 | "EV_VERIFY", | |
224 | "EV_TIMER", | |
225 | }; | |
226 | ||
227 | static void | |
228 | tei_debug(struct FsmInst *fi, char *fmt, ...) | |
229 | { | |
230 | struct teimgr *tm = fi->userdata; | |
020f01eb | 231 | struct va_format vaf; |
1b2b03f8 KK |
232 | va_list va; |
233 | ||
234 | if (!(*debug & DEBUG_L2_TEIFSM)) | |
235 | return; | |
020f01eb | 236 | |
1b2b03f8 | 237 | va_start(va, fmt); |
020f01eb JP |
238 | |
239 | vaf.fmt = fmt; | |
240 | vaf.va = &va; | |
241 | ||
242 | printk(KERN_DEBUG "sapi(%d) tei(%d): %pV\n", | |
243 | tm->l2->sapi, tm->l2->tei, &vaf); | |
244 | ||
1b2b03f8 KK |
245 | va_end(va); |
246 | } | |
247 | ||
248 | ||
249 | ||
250 | static int | |
251 | get_free_id(struct manager *mgr) | |
252 | { | |
253 | u64 ids = 0; | |
254 | int i; | |
255 | struct layer2 *l2; | |
256 | ||
257 | list_for_each_entry(l2, &mgr->layer2, list) { | |
258 | if (l2->ch.nr > 63) { | |
259 | printk(KERN_WARNING | |
260 | "%s: more as 63 layer2 for one device\n", | |
261 | __func__); | |
262 | return -EBUSY; | |
263 | } | |
264 | test_and_set_bit(l2->ch.nr, (u_long *)&ids); | |
265 | } | |
266 | for (i = 1; i < 64; i++) | |
267 | if (!test_bit(i, (u_long *)&ids)) | |
268 | return i; | |
269 | printk(KERN_WARNING "%s: more as 63 layer2 for one device\n", | |
270 | __func__); | |
271 | return -EBUSY; | |
272 | } | |
273 | ||
274 | static int | |
275 | get_free_tei(struct manager *mgr) | |
276 | { | |
277 | u64 ids = 0; | |
278 | int i; | |
279 | struct layer2 *l2; | |
280 | ||
281 | list_for_each_entry(l2, &mgr->layer2, list) { | |
282 | if (l2->ch.nr == 0) | |
283 | continue; | |
284 | if ((l2->ch.addr & 0xff) != 0) | |
285 | continue; | |
286 | i = l2->ch.addr >> 8; | |
287 | if (i < 64) | |
288 | continue; | |
289 | i -= 64; | |
290 | ||
291 | test_and_set_bit(i, (u_long *)&ids); | |
292 | } | |
293 | for (i = 0; i < 64; i++) | |
294 | if (!test_bit(i, (u_long *)&ids)) | |
295 | return i + 64; | |
296 | printk(KERN_WARNING "%s: more as 63 dynamic tei for one device\n", | |
297 | __func__); | |
298 | return -1; | |
299 | } | |
300 | ||
301 | static void | |
302 | teiup_create(struct manager *mgr, u_int prim, int len, void *arg) | |
303 | { | |
304 | struct sk_buff *skb; | |
305 | struct mISDNhead *hh; | |
306 | int err; | |
307 | ||
308 | skb = mI_alloc_skb(len, GFP_ATOMIC); | |
309 | if (!skb) | |
310 | return; | |
311 | hh = mISDN_HEAD_P(skb); | |
312 | hh->prim = prim; | |
313 | hh->id = (mgr->ch.nr << 16) | mgr->ch.addr; | |
314 | if (len) | |
315 | memcpy(skb_put(skb, len), arg, len); | |
316 | err = mgr->up->send(mgr->up, skb); | |
317 | if (err) { | |
318 | printk(KERN_WARNING "%s: err=%d\n", __func__, err); | |
319 | dev_kfree_skb(skb); | |
320 | } | |
321 | } | |
322 | ||
323 | static u_int | |
324 | new_id(struct manager *mgr) | |
325 | { | |
326 | u_int id; | |
327 | ||
328 | id = mgr->nextid++; | |
329 | if (id == 0x7fff) | |
330 | mgr->nextid = 1; | |
331 | id <<= 16; | |
332 | id |= GROUP_TEI << 8; | |
333 | id |= TEI_SAPI; | |
334 | return id; | |
335 | } | |
336 | ||
337 | static void | |
338 | do_send(struct manager *mgr) | |
339 | { | |
340 | if (!test_bit(MGR_PH_ACTIVE, &mgr->options)) | |
341 | return; | |
342 | ||
343 | if (!test_and_set_bit(MGR_PH_NOTREADY, &mgr->options)) { | |
344 | struct sk_buff *skb = skb_dequeue(&mgr->sendq); | |
345 | ||
346 | if (!skb) { | |
347 | test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options); | |
348 | return; | |
349 | } | |
350 | mgr->lastid = mISDN_HEAD_ID(skb); | |
351 | mISDN_FsmEvent(&mgr->deact, EV_UI, NULL); | |
352 | if (mgr->ch.recv(mgr->ch.peer, skb)) { | |
353 | dev_kfree_skb(skb); | |
354 | test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options); | |
355 | mgr->lastid = MISDN_ID_NONE; | |
356 | } | |
357 | } | |
358 | } | |
359 | ||
360 | static void | |
361 | do_ack(struct manager *mgr, u_int id) | |
362 | { | |
363 | if (test_bit(MGR_PH_NOTREADY, &mgr->options)) { | |
364 | if (id == mgr->lastid) { | |
365 | if (test_bit(MGR_PH_ACTIVE, &mgr->options)) { | |
366 | struct sk_buff *skb; | |
367 | ||
368 | skb = skb_dequeue(&mgr->sendq); | |
369 | if (skb) { | |
370 | mgr->lastid = mISDN_HEAD_ID(skb); | |
371 | if (!mgr->ch.recv(mgr->ch.peer, skb)) | |
372 | return; | |
373 | dev_kfree_skb(skb); | |
374 | } | |
375 | } | |
376 | mgr->lastid = MISDN_ID_NONE; | |
377 | test_and_clear_bit(MGR_PH_NOTREADY, &mgr->options); | |
378 | } | |
379 | } | |
380 | } | |
381 | ||
382 | static void | |
383 | mgr_send_down(struct manager *mgr, struct sk_buff *skb) | |
384 | { | |
385 | skb_queue_tail(&mgr->sendq, skb); | |
386 | if (!test_bit(MGR_PH_ACTIVE, &mgr->options)) { | |
387 | _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0, | |
388 | NULL, GFP_KERNEL); | |
389 | } else { | |
390 | do_send(mgr); | |
391 | } | |
392 | } | |
393 | ||
394 | static int | |
395 | dl_unit_data(struct manager *mgr, struct sk_buff *skb) | |
396 | { | |
397 | if (!test_bit(MGR_OPT_NETWORK, &mgr->options)) /* only net send UI */ | |
398 | return -EINVAL; | |
399 | if (!test_bit(MGR_PH_ACTIVE, &mgr->options)) | |
400 | _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0, | |
401 | NULL, GFP_KERNEL); | |
402 | skb_push(skb, 3); | |
403 | skb->data[0] = 0x02; /* SAPI 0 C/R = 1 */ | |
404 | skb->data[1] = 0xff; /* TEI 127 */ | |
405 | skb->data[2] = UI; /* UI frame */ | |
406 | mISDN_HEAD_PRIM(skb) = PH_DATA_REQ; | |
407 | mISDN_HEAD_ID(skb) = new_id(mgr); | |
408 | skb_queue_tail(&mgr->sendq, skb); | |
409 | do_send(mgr); | |
410 | return 0; | |
411 | } | |
412 | ||
5b834354 | 413 | static unsigned int |
1b2b03f8 KK |
414 | random_ri(void) |
415 | { | |
416 | u16 x; | |
417 | ||
418 | get_random_bytes(&x, sizeof(x)); | |
419 | return x; | |
420 | } | |
421 | ||
422 | static struct layer2 * | |
423 | findtei(struct manager *mgr, int tei) | |
424 | { | |
425 | struct layer2 *l2; | |
426 | u_long flags; | |
427 | ||
428 | read_lock_irqsave(&mgr->lock, flags); | |
429 | list_for_each_entry(l2, &mgr->layer2, list) { | |
430 | if ((l2->sapi == 0) && (l2->tei > 0) && | |
431 | (l2->tei != GROUP_TEI) && (l2->tei == tei)) | |
432 | goto done; | |
433 | } | |
434 | l2 = NULL; | |
435 | done: | |
436 | read_unlock_irqrestore(&mgr->lock, flags); | |
437 | return l2; | |
438 | } | |
439 | ||
440 | static void | |
5b277b86 | 441 | put_tei_msg(struct manager *mgr, u_char m_id, unsigned int ri, int tei) |
1b2b03f8 KK |
442 | { |
443 | struct sk_buff *skb; | |
444 | u_char bp[8]; | |
445 | ||
446 | bp[0] = (TEI_SAPI << 2); | |
447 | if (test_bit(MGR_OPT_NETWORK, &mgr->options)) | |
448 | bp[0] |= 2; /* CR:=1 for net command */ | |
449 | bp[1] = (GROUP_TEI << 1) | 0x1; | |
450 | bp[2] = UI; | |
451 | bp[3] = TEI_ENTITY_ID; | |
452 | bp[4] = ri >> 8; | |
453 | bp[5] = ri & 0xff; | |
454 | bp[6] = m_id; | |
5b277b86 AE |
455 | bp[7] = ((tei << 1) & 0xff) | 1; |
456 | skb = _alloc_mISDN_skb(PH_DATA_REQ, new_id(mgr), 8, bp, GFP_ATOMIC); | |
1b2b03f8 KK |
457 | if (!skb) { |
458 | printk(KERN_WARNING "%s: no skb for tei msg\n", __func__); | |
459 | return; | |
460 | } | |
461 | mgr_send_down(mgr, skb); | |
462 | } | |
463 | ||
464 | static void | |
465 | tei_id_request(struct FsmInst *fi, int event, void *arg) | |
466 | { | |
467 | struct teimgr *tm = fi->userdata; | |
468 | ||
469 | if (tm->l2->tei != GROUP_TEI) { | |
470 | tm->tei_m.printdebug(&tm->tei_m, | |
698f9315 | 471 | "assign request for already assigned tei %d", |
1b2b03f8 KK |
472 | tm->l2->tei); |
473 | return; | |
474 | } | |
475 | tm->ri = random_ri(); | |
476 | if (*debug & DEBUG_L2_TEI) | |
477 | tm->tei_m.printdebug(&tm->tei_m, | |
478 | "assign request ri %d", tm->ri); | |
479 | put_tei_msg(tm->mgr, ID_REQUEST, tm->ri, GROUP_TEI); | |
480 | mISDN_FsmChangeState(fi, ST_TEI_IDREQ); | |
481 | mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 1); | |
482 | tm->nval = 3; | |
483 | } | |
484 | ||
485 | static void | |
486 | tei_id_assign(struct FsmInst *fi, int event, void *arg) | |
487 | { | |
488 | struct teimgr *tm = fi->userdata; | |
489 | struct layer2 *l2; | |
490 | u_char *dp = arg; | |
491 | int ri, tei; | |
492 | ||
493 | ri = ((unsigned int) *dp++ << 8); | |
494 | ri += *dp++; | |
495 | dp++; | |
496 | tei = *dp >> 1; | |
497 | if (*debug & DEBUG_L2_TEI) | |
498 | tm->tei_m.printdebug(fi, "identity assign ri %d tei %d", | |
499 | ri, tei); | |
500 | l2 = findtei(tm->mgr, tei); | |
501 | if (l2) { /* same tei is in use */ | |
502 | if (ri != l2->tm->ri) { | |
503 | tm->tei_m.printdebug(fi, | |
504 | "possible duplicate assignment tei %d", tei); | |
505 | tei_l2(l2, MDL_ERROR_RSP, 0); | |
506 | } | |
507 | } else if (ri == tm->ri) { | |
508 | mISDN_FsmDelTimer(&tm->timer, 1); | |
509 | mISDN_FsmChangeState(fi, ST_TEI_NOP); | |
510 | tei_l2(tm->l2, MDL_ASSIGN_REQ, tei); | |
511 | } | |
512 | } | |
513 | ||
514 | static void | |
515 | tei_id_test_dup(struct FsmInst *fi, int event, void *arg) | |
516 | { | |
517 | struct teimgr *tm = fi->userdata; | |
518 | struct layer2 *l2; | |
519 | u_char *dp = arg; | |
520 | int tei, ri; | |
521 | ||
522 | ri = ((unsigned int) *dp++ << 8); | |
523 | ri += *dp++; | |
524 | dp++; | |
525 | tei = *dp >> 1; | |
526 | if (*debug & DEBUG_L2_TEI) | |
527 | tm->tei_m.printdebug(fi, "foreign identity assign ri %d tei %d", | |
528 | ri, tei); | |
529 | l2 = findtei(tm->mgr, tei); | |
530 | if (l2) { /* same tei is in use */ | |
531 | if (ri != l2->tm->ri) { /* and it wasn't our request */ | |
532 | tm->tei_m.printdebug(fi, | |
533 | "possible duplicate assignment tei %d", tei); | |
534 | mISDN_FsmEvent(&l2->tm->tei_m, EV_VERIFY, NULL); | |
535 | } | |
536 | } | |
537 | } | |
538 | ||
539 | static void | |
540 | tei_id_denied(struct FsmInst *fi, int event, void *arg) | |
541 | { | |
542 | struct teimgr *tm = fi->userdata; | |
543 | u_char *dp = arg; | |
544 | int ri, tei; | |
545 | ||
546 | ri = ((unsigned int) *dp++ << 8); | |
547 | ri += *dp++; | |
548 | dp++; | |
549 | tei = *dp >> 1; | |
550 | if (*debug & DEBUG_L2_TEI) | |
551 | tm->tei_m.printdebug(fi, "identity denied ri %d tei %d", | |
552 | ri, tei); | |
553 | } | |
554 | ||
555 | static void | |
556 | tei_id_chk_req(struct FsmInst *fi, int event, void *arg) | |
557 | { | |
558 | struct teimgr *tm = fi->userdata; | |
559 | u_char *dp = arg; | |
560 | int tei; | |
561 | ||
562 | tei = *(dp+3) >> 1; | |
563 | if (*debug & DEBUG_L2_TEI) | |
564 | tm->tei_m.printdebug(fi, "identity check req tei %d", tei); | |
565 | if ((tm->l2->tei != GROUP_TEI) && ((tei == GROUP_TEI) || | |
566 | (tei == tm->l2->tei))) { | |
567 | mISDN_FsmDelTimer(&tm->timer, 4); | |
568 | mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP); | |
569 | put_tei_msg(tm->mgr, ID_CHK_RES, random_ri(), tm->l2->tei); | |
570 | } | |
571 | } | |
572 | ||
573 | static void | |
574 | tei_id_remove(struct FsmInst *fi, int event, void *arg) | |
575 | { | |
576 | struct teimgr *tm = fi->userdata; | |
577 | u_char *dp = arg; | |
578 | int tei; | |
579 | ||
580 | tei = *(dp+3) >> 1; | |
581 | if (*debug & DEBUG_L2_TEI) | |
582 | tm->tei_m.printdebug(fi, "identity remove tei %d", tei); | |
583 | if ((tm->l2->tei != GROUP_TEI) && | |
584 | ((tei == GROUP_TEI) || (tei == tm->l2->tei))) { | |
585 | mISDN_FsmDelTimer(&tm->timer, 5); | |
586 | mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP); | |
587 | tei_l2(tm->l2, MDL_REMOVE_REQ, 0); | |
588 | } | |
589 | } | |
590 | ||
591 | static void | |
592 | tei_id_verify(struct FsmInst *fi, int event, void *arg) | |
593 | { | |
594 | struct teimgr *tm = fi->userdata; | |
595 | ||
596 | if (*debug & DEBUG_L2_TEI) | |
597 | tm->tei_m.printdebug(fi, "id verify request for tei %d", | |
598 | tm->l2->tei); | |
599 | put_tei_msg(tm->mgr, ID_VERIFY, 0, tm->l2->tei); | |
600 | mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY); | |
601 | mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2); | |
602 | tm->nval = 2; | |
603 | } | |
604 | ||
605 | static void | |
606 | tei_id_req_tout(struct FsmInst *fi, int event, void *arg) | |
607 | { | |
608 | struct teimgr *tm = fi->userdata; | |
609 | ||
610 | if (--tm->nval) { | |
611 | tm->ri = random_ri(); | |
612 | if (*debug & DEBUG_L2_TEI) | |
613 | tm->tei_m.printdebug(fi, "assign req(%d) ri %d", | |
614 | 4 - tm->nval, tm->ri); | |
615 | put_tei_msg(tm->mgr, ID_REQUEST, tm->ri, GROUP_TEI); | |
616 | mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 3); | |
617 | } else { | |
618 | tm->tei_m.printdebug(fi, "assign req failed"); | |
619 | tei_l2(tm->l2, MDL_ERROR_RSP, 0); | |
620 | mISDN_FsmChangeState(fi, ST_TEI_NOP); | |
621 | } | |
622 | } | |
623 | ||
624 | static void | |
625 | tei_id_ver_tout(struct FsmInst *fi, int event, void *arg) | |
626 | { | |
627 | struct teimgr *tm = fi->userdata; | |
628 | ||
629 | if (--tm->nval) { | |
630 | if (*debug & DEBUG_L2_TEI) | |
631 | tm->tei_m.printdebug(fi, | |
632 | "id verify req(%d) for tei %d", | |
633 | 3 - tm->nval, tm->l2->tei); | |
634 | put_tei_msg(tm->mgr, ID_VERIFY, 0, tm->l2->tei); | |
635 | mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4); | |
636 | } else { | |
637 | tm->tei_m.printdebug(fi, "verify req for tei %d failed", | |
638 | tm->l2->tei); | |
639 | tei_l2(tm->l2, MDL_REMOVE_REQ, 0); | |
640 | mISDN_FsmChangeState(fi, ST_TEI_NOP); | |
641 | } | |
642 | } | |
643 | ||
644 | static struct FsmNode TeiFnListUser[] = | |
645 | { | |
646 | {ST_TEI_NOP, EV_IDREQ, tei_id_request}, | |
647 | {ST_TEI_NOP, EV_ASSIGN, tei_id_test_dup}, | |
648 | {ST_TEI_NOP, EV_VERIFY, tei_id_verify}, | |
649 | {ST_TEI_NOP, EV_REMOVE, tei_id_remove}, | |
650 | {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req}, | |
651 | {ST_TEI_IDREQ, EV_TIMER, tei_id_req_tout}, | |
652 | {ST_TEI_IDREQ, EV_ASSIGN, tei_id_assign}, | |
653 | {ST_TEI_IDREQ, EV_DENIED, tei_id_denied}, | |
654 | {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout}, | |
655 | {ST_TEI_IDVERIFY, EV_REMOVE, tei_id_remove}, | |
656 | {ST_TEI_IDVERIFY, EV_CHKREQ, tei_id_chk_req}, | |
657 | }; | |
658 | ||
659 | static void | |
660 | tei_l2remove(struct layer2 *l2) | |
661 | { | |
662 | put_tei_msg(l2->tm->mgr, ID_REMOVE, 0, l2->tei); | |
663 | tei_l2(l2, MDL_REMOVE_REQ, 0); | |
664 | list_del(&l2->ch.list); | |
665 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); | |
666 | } | |
667 | ||
668 | static void | |
669 | tei_assign_req(struct FsmInst *fi, int event, void *arg) | |
670 | { | |
671 | struct teimgr *tm = fi->userdata; | |
672 | u_char *dp = arg; | |
673 | ||
674 | if (tm->l2->tei == GROUP_TEI) { | |
675 | tm->tei_m.printdebug(&tm->tei_m, | |
676 | "net tei assign request without tei"); | |
677 | return; | |
678 | } | |
679 | tm->ri = ((unsigned int) *dp++ << 8); | |
680 | tm->ri += *dp++; | |
681 | if (*debug & DEBUG_L2_TEI) | |
682 | tm->tei_m.printdebug(&tm->tei_m, | |
683 | "net assign request ri %d teim %d", tm->ri, *dp); | |
684 | put_tei_msg(tm->mgr, ID_ASSIGNED, tm->ri, tm->l2->tei); | |
685 | mISDN_FsmChangeState(fi, ST_TEI_NOP); | |
686 | } | |
687 | ||
688 | static void | |
689 | tei_id_chk_req_net(struct FsmInst *fi, int event, void *arg) | |
690 | { | |
691 | struct teimgr *tm = fi->userdata; | |
692 | ||
693 | if (*debug & DEBUG_L2_TEI) | |
694 | tm->tei_m.printdebug(fi, "id check request for tei %d", | |
695 | tm->l2->tei); | |
696 | tm->rcnt = 0; | |
697 | put_tei_msg(tm->mgr, ID_CHK_REQ, 0, tm->l2->tei); | |
698 | mISDN_FsmChangeState(&tm->tei_m, ST_TEI_IDVERIFY); | |
699 | mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 2); | |
700 | tm->nval = 2; | |
701 | } | |
702 | ||
703 | static void | |
704 | tei_id_chk_resp(struct FsmInst *fi, int event, void *arg) | |
705 | { | |
706 | struct teimgr *tm = fi->userdata; | |
707 | u_char *dp = arg; | |
708 | int tei; | |
709 | ||
710 | tei = dp[3] >> 1; | |
711 | if (*debug & DEBUG_L2_TEI) | |
712 | tm->tei_m.printdebug(fi, "identity check resp tei %d", tei); | |
713 | if (tei == tm->l2->tei) | |
714 | tm->rcnt++; | |
715 | } | |
716 | ||
717 | static void | |
718 | tei_id_verify_net(struct FsmInst *fi, int event, void *arg) | |
719 | { | |
720 | struct teimgr *tm = fi->userdata; | |
721 | u_char *dp = arg; | |
722 | int tei; | |
723 | ||
724 | tei = dp[3] >> 1; | |
725 | if (*debug & DEBUG_L2_TEI) | |
726 | tm->tei_m.printdebug(fi, "identity verify req tei %d/%d", | |
727 | tei, tm->l2->tei); | |
728 | if (tei == tm->l2->tei) | |
729 | tei_id_chk_req_net(fi, event, arg); | |
730 | } | |
731 | ||
732 | static void | |
733 | tei_id_ver_tout_net(struct FsmInst *fi, int event, void *arg) | |
734 | { | |
735 | struct teimgr *tm = fi->userdata; | |
736 | ||
737 | if (tm->rcnt == 1) { | |
738 | if (*debug & DEBUG_L2_TEI) | |
739 | tm->tei_m.printdebug(fi, | |
af901ca1 | 740 | "check req for tei %d successful\n", tm->l2->tei); |
1b2b03f8 KK |
741 | mISDN_FsmChangeState(fi, ST_TEI_NOP); |
742 | } else if (tm->rcnt > 1) { | |
743 | /* duplicate assignment; remove */ | |
744 | tei_l2remove(tm->l2); | |
745 | } else if (--tm->nval) { | |
746 | if (*debug & DEBUG_L2_TEI) | |
747 | tm->tei_m.printdebug(fi, | |
748 | "id check req(%d) for tei %d", | |
749 | 3 - tm->nval, tm->l2->tei); | |
750 | put_tei_msg(tm->mgr, ID_CHK_REQ, 0, tm->l2->tei); | |
751 | mISDN_FsmAddTimer(&tm->timer, tm->tval, EV_TIMER, NULL, 4); | |
752 | } else { | |
753 | tm->tei_m.printdebug(fi, "check req for tei %d failed", | |
754 | tm->l2->tei); | |
755 | mISDN_FsmChangeState(fi, ST_TEI_NOP); | |
756 | tei_l2remove(tm->l2); | |
757 | } | |
758 | } | |
759 | ||
760 | static struct FsmNode TeiFnListNet[] = | |
761 | { | |
762 | {ST_TEI_NOP, EV_ASSIGN_REQ, tei_assign_req}, | |
763 | {ST_TEI_NOP, EV_VERIFY, tei_id_verify_net}, | |
764 | {ST_TEI_NOP, EV_CHKREQ, tei_id_chk_req_net}, | |
765 | {ST_TEI_IDVERIFY, EV_TIMER, tei_id_ver_tout_net}, | |
766 | {ST_TEI_IDVERIFY, EV_CHKRESP, tei_id_chk_resp}, | |
767 | }; | |
768 | ||
769 | static void | |
770 | tei_ph_data_ind(struct teimgr *tm, u_int mt, u_char *dp, int len) | |
771 | { | |
772 | if (test_bit(FLG_FIXED_TEI, &tm->l2->flag)) | |
773 | return; | |
774 | if (*debug & DEBUG_L2_TEI) | |
775 | tm->tei_m.printdebug(&tm->tei_m, "tei handler mt %x", mt); | |
776 | if (mt == ID_ASSIGNED) | |
777 | mISDN_FsmEvent(&tm->tei_m, EV_ASSIGN, dp); | |
778 | else if (mt == ID_DENIED) | |
779 | mISDN_FsmEvent(&tm->tei_m, EV_DENIED, dp); | |
780 | else if (mt == ID_CHK_REQ) | |
781 | mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, dp); | |
782 | else if (mt == ID_REMOVE) | |
783 | mISDN_FsmEvent(&tm->tei_m, EV_REMOVE, dp); | |
784 | else if (mt == ID_VERIFY) | |
785 | mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, dp); | |
786 | else if (mt == ID_CHK_RES) | |
787 | mISDN_FsmEvent(&tm->tei_m, EV_CHKRESP, dp); | |
788 | } | |
789 | ||
790 | static struct layer2 * | |
5b277b86 | 791 | create_new_tei(struct manager *mgr, int tei, int sapi) |
1b2b03f8 KK |
792 | { |
793 | u_long opt = 0; | |
794 | u_long flags; | |
795 | int id; | |
796 | struct layer2 *l2; | |
797 | ||
798 | if (!mgr->up) | |
799 | return NULL; | |
5b277b86 | 800 | if ((tei >= 0) && (tei < 64)) |
1b2b03f8 KK |
801 | test_and_set_bit(OPTION_L2_FIXEDTEI, &opt); |
802 | if (mgr->ch.st->dev->Dprotocols | |
803 | & ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1))) | |
804 | test_and_set_bit(OPTION_L2_PMX, &opt); | |
5b277b86 | 805 | l2 = create_l2(mgr->up, ISDN_P_LAPD_NT, opt, tei, sapi); |
1b2b03f8 KK |
806 | if (!l2) { |
807 | printk(KERN_WARNING "%s:no memory for layer2\n", __func__); | |
808 | return NULL; | |
809 | } | |
810 | l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL); | |
811 | if (!l2->tm) { | |
812 | kfree(l2); | |
813 | printk(KERN_WARNING "%s:no memory for teimgr\n", __func__); | |
814 | return NULL; | |
815 | } | |
816 | l2->tm->mgr = mgr; | |
817 | l2->tm->l2 = l2; | |
818 | l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM; | |
819 | l2->tm->tei_m.userdata = l2->tm; | |
820 | l2->tm->tei_m.printdebug = tei_debug; | |
821 | l2->tm->tei_m.fsm = &teifsmn; | |
822 | l2->tm->tei_m.state = ST_TEI_NOP; | |
823 | l2->tm->tval = 2000; /* T202 2 sec */ | |
824 | mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer); | |
825 | write_lock_irqsave(&mgr->lock, flags); | |
826 | id = get_free_id(mgr); | |
827 | list_add_tail(&l2->list, &mgr->layer2); | |
828 | write_unlock_irqrestore(&mgr->lock, flags); | |
829 | if (id < 0) { | |
830 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); | |
831 | printk(KERN_WARNING "%s:no free id\n", __func__); | |
832 | return NULL; | |
833 | } else { | |
834 | l2->ch.nr = id; | |
835 | __add_layer2(&l2->ch, mgr->ch.st); | |
836 | l2->ch.recv = mgr->ch.recv; | |
837 | l2->ch.peer = mgr->ch.peer; | |
838 | l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL); | |
839 | } | |
840 | return l2; | |
841 | } | |
842 | ||
843 | static void | |
844 | new_tei_req(struct manager *mgr, u_char *dp) | |
845 | { | |
846 | int tei, ri; | |
847 | struct layer2 *l2; | |
848 | ||
849 | ri = dp[0] << 8; | |
850 | ri += dp[1]; | |
851 | if (!mgr->up) | |
852 | goto denied; | |
5b277b86 AE |
853 | if (!(dp[3] & 1)) /* Extension bit != 1 */ |
854 | goto denied; | |
855 | if (dp[3] != 0xff) | |
856 | tei = dp[3] >> 1; /* 3GPP TS 08.56 6.1.11.2 */ | |
857 | else | |
858 | tei = get_free_tei(mgr); | |
1b2b03f8 KK |
859 | if (tei < 0) { |
860 | printk(KERN_WARNING "%s:No free tei\n", __func__); | |
861 | goto denied; | |
862 | } | |
5b277b86 | 863 | l2 = create_new_tei(mgr, tei, CTRL_SAPI); |
1b2b03f8 KK |
864 | if (!l2) |
865 | goto denied; | |
866 | else | |
867 | mISDN_FsmEvent(&l2->tm->tei_m, EV_ASSIGN_REQ, dp); | |
868 | return; | |
869 | denied: | |
870 | put_tei_msg(mgr, ID_DENIED, ri, GROUP_TEI); | |
871 | } | |
872 | ||
873 | static int | |
874 | ph_data_ind(struct manager *mgr, struct sk_buff *skb) | |
875 | { | |
876 | int ret = -EINVAL; | |
8164491d | 877 | struct layer2 *l2, *nl2; |
1b2b03f8 KK |
878 | u_char mt; |
879 | ||
880 | if (skb->len < 8) { | |
881 | if (*debug & DEBUG_L2_TEI) | |
882 | printk(KERN_DEBUG "%s: short mgr frame %d/8\n", | |
883 | __func__, skb->len); | |
884 | goto done; | |
885 | } | |
1b2b03f8 KK |
886 | |
887 | if ((skb->data[0] >> 2) != TEI_SAPI) /* not for us */ | |
888 | goto done; | |
889 | if (skb->data[0] & 1) /* EA0 formal error */ | |
890 | goto done; | |
891 | if (!(skb->data[1] & 1)) /* EA1 formal error */ | |
892 | goto done; | |
893 | if ((skb->data[1] >> 1) != GROUP_TEI) /* not for us */ | |
894 | goto done; | |
895 | if ((skb->data[2] & 0xef) != UI) /* not UI */ | |
896 | goto done; | |
897 | if (skb->data[3] != TEI_ENTITY_ID) /* not tei entity */ | |
898 | goto done; | |
899 | mt = skb->data[6]; | |
900 | switch (mt) { | |
901 | case ID_REQUEST: | |
902 | case ID_CHK_RES: | |
903 | case ID_VERIFY: | |
904 | if (!test_bit(MGR_OPT_NETWORK, &mgr->options)) | |
905 | goto done; | |
906 | break; | |
907 | case ID_ASSIGNED: | |
908 | case ID_DENIED: | |
909 | case ID_CHK_REQ: | |
910 | case ID_REMOVE: | |
911 | if (test_bit(MGR_OPT_NETWORK, &mgr->options)) | |
912 | goto done; | |
913 | break; | |
914 | default: | |
915 | goto done; | |
916 | } | |
917 | ret = 0; | |
918 | if (mt == ID_REQUEST) { | |
919 | new_tei_req(mgr, &skb->data[4]); | |
920 | goto done; | |
921 | } | |
8164491d | 922 | list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) { |
1b2b03f8 KK |
923 | tei_ph_data_ind(l2->tm, mt, &skb->data[4], skb->len - 4); |
924 | } | |
1b2b03f8 KK |
925 | done: |
926 | return ret; | |
927 | } | |
928 | ||
929 | int | |
930 | l2_tei(struct layer2 *l2, u_int cmd, u_long arg) | |
931 | { | |
932 | struct teimgr *tm = l2->tm; | |
933 | ||
934 | if (test_bit(FLG_FIXED_TEI, &l2->flag)) | |
935 | return 0; | |
936 | if (*debug & DEBUG_L2_TEI) | |
937 | printk(KERN_DEBUG "%s: cmd(%x)\n", __func__, cmd); | |
938 | switch (cmd) { | |
939 | case MDL_ASSIGN_IND: | |
940 | mISDN_FsmEvent(&tm->tei_m, EV_IDREQ, NULL); | |
941 | break; | |
942 | case MDL_ERROR_IND: | |
943 | if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options)) | |
944 | mISDN_FsmEvent(&tm->tei_m, EV_CHKREQ, &l2->tei); | |
945 | if (test_bit(MGR_OPT_USER, &tm->mgr->options)) | |
946 | mISDN_FsmEvent(&tm->tei_m, EV_VERIFY, NULL); | |
947 | break; | |
948 | case MDL_STATUS_UP_IND: | |
949 | if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options)) | |
950 | mISDN_FsmEvent(&tm->mgr->deact, EV_ACTIVATE, NULL); | |
951 | break; | |
952 | case MDL_STATUS_DOWN_IND: | |
953 | if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options)) | |
954 | mISDN_FsmEvent(&tm->mgr->deact, EV_DEACTIVATE, NULL); | |
955 | break; | |
956 | case MDL_STATUS_UI_IND: | |
957 | if (test_bit(MGR_OPT_NETWORK, &tm->mgr->options)) | |
958 | mISDN_FsmEvent(&tm->mgr->deact, EV_UI, NULL); | |
959 | break; | |
960 | } | |
961 | return 0; | |
962 | } | |
963 | ||
964 | void | |
c5b61d59 | 965 | TEIrelease(struct layer2 *l2) |
1b2b03f8 KK |
966 | { |
967 | struct teimgr *tm = l2->tm; | |
968 | u_long flags; | |
969 | ||
970 | mISDN_FsmDelTimer(&tm->timer, 1); | |
971 | write_lock_irqsave(&tm->mgr->lock, flags); | |
972 | list_del(&l2->list); | |
973 | write_unlock_irqrestore(&tm->mgr->lock, flags); | |
974 | l2->tm = NULL; | |
975 | kfree(tm); | |
976 | } | |
977 | ||
978 | static int | |
979 | create_teimgr(struct manager *mgr, struct channel_req *crq) | |
980 | { | |
981 | struct layer2 *l2; | |
982 | u_long opt = 0; | |
983 | u_long flags; | |
984 | int id; | |
985 | ||
986 | if (*debug & DEBUG_L2_TEI) | |
987 | printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n", | |
837468d1 MU |
988 | __func__, dev_name(&mgr->ch.st->dev->dev), |
989 | crq->protocol, crq->adr.dev, crq->adr.channel, | |
990 | crq->adr.sapi, crq->adr.tei); | |
1b2b03f8 KK |
991 | if (crq->adr.tei > GROUP_TEI) |
992 | return -EINVAL; | |
993 | if (crq->adr.tei < 64) | |
994 | test_and_set_bit(OPTION_L2_FIXEDTEI, &opt); | |
995 | if (crq->adr.tei == 0) | |
996 | test_and_set_bit(OPTION_L2_PTP, &opt); | |
997 | if (test_bit(MGR_OPT_NETWORK, &mgr->options)) { | |
998 | if (crq->protocol == ISDN_P_LAPD_TE) | |
999 | return -EPROTONOSUPPORT; | |
1000 | if ((crq->adr.tei != 0) && (crq->adr.tei != 127)) | |
1001 | return -EINVAL; | |
1002 | if (mgr->up) { | |
1003 | printk(KERN_WARNING | |
1004 | "%s: only one network manager is allowed\n", | |
1005 | __func__); | |
1006 | return -EBUSY; | |
1007 | } | |
1008 | } else if (test_bit(MGR_OPT_USER, &mgr->options)) { | |
1009 | if (crq->protocol == ISDN_P_LAPD_NT) | |
1010 | return -EPROTONOSUPPORT; | |
1011 | if ((crq->adr.tei >= 64) && (crq->adr.tei < GROUP_TEI)) | |
1012 | return -EINVAL; /* dyn tei */ | |
1013 | } else { | |
1014 | if (crq->protocol == ISDN_P_LAPD_NT) | |
1015 | test_and_set_bit(MGR_OPT_NETWORK, &mgr->options); | |
1016 | if (crq->protocol == ISDN_P_LAPD_TE) | |
1017 | test_and_set_bit(MGR_OPT_USER, &mgr->options); | |
1018 | } | |
1019 | if (mgr->ch.st->dev->Dprotocols | |
1020 | & ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1))) | |
1021 | test_and_set_bit(OPTION_L2_PMX, &opt); | |
1022 | if ((crq->protocol == ISDN_P_LAPD_NT) && (crq->adr.tei == 127)) { | |
1023 | mgr->up = crq->ch; | |
1024 | id = DL_INFO_L2_CONNECT; | |
1025 | teiup_create(mgr, DL_INFORMATION_IND, sizeof(id), &id); | |
1026 | crq->ch = NULL; | |
1027 | if (!list_empty(&mgr->layer2)) { | |
1028 | read_lock_irqsave(&mgr->lock, flags); | |
1029 | list_for_each_entry(l2, &mgr->layer2, list) { | |
1030 | l2->up = mgr->up; | |
1031 | l2->ch.ctrl(&l2->ch, OPEN_CHANNEL, NULL); | |
1032 | } | |
1033 | read_unlock_irqrestore(&mgr->lock, flags); | |
1034 | } | |
1035 | return 0; | |
1036 | } | |
5b277b86 AE |
1037 | l2 = create_l2(crq->ch, crq->protocol, opt, |
1038 | crq->adr.tei, crq->adr.sapi); | |
1b2b03f8 KK |
1039 | if (!l2) |
1040 | return -ENOMEM; | |
1041 | l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL); | |
1042 | if (!l2->tm) { | |
1043 | kfree(l2); | |
1044 | printk(KERN_ERR "kmalloc teimgr failed\n"); | |
1045 | return -ENOMEM; | |
1046 | } | |
1047 | l2->tm->mgr = mgr; | |
1048 | l2->tm->l2 = l2; | |
1049 | l2->tm->tei_m.debug = *debug & DEBUG_L2_TEIFSM; | |
1050 | l2->tm->tei_m.userdata = l2->tm; | |
1051 | l2->tm->tei_m.printdebug = tei_debug; | |
1052 | if (crq->protocol == ISDN_P_LAPD_TE) { | |
1053 | l2->tm->tei_m.fsm = &teifsmu; | |
1054 | l2->tm->tei_m.state = ST_TEI_NOP; | |
1055 | l2->tm->tval = 1000; /* T201 1 sec */ | |
1056 | } else { | |
1057 | l2->tm->tei_m.fsm = &teifsmn; | |
1058 | l2->tm->tei_m.state = ST_TEI_NOP; | |
1059 | l2->tm->tval = 2000; /* T202 2 sec */ | |
1060 | } | |
1061 | mISDN_FsmInitTimer(&l2->tm->tei_m, &l2->tm->timer); | |
1062 | write_lock_irqsave(&mgr->lock, flags); | |
1063 | id = get_free_id(mgr); | |
1064 | list_add_tail(&l2->list, &mgr->layer2); | |
1065 | write_unlock_irqrestore(&mgr->lock, flags); | |
1066 | if (id < 0) { | |
1067 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); | |
1068 | } else { | |
1069 | l2->ch.nr = id; | |
1070 | l2->up->nr = id; | |
1071 | crq->ch = &l2->ch; | |
1072 | id = 0; | |
1073 | } | |
1074 | return id; | |
1075 | } | |
1076 | ||
1077 | static int | |
1078 | mgr_send(struct mISDNchannel *ch, struct sk_buff *skb) | |
1079 | { | |
1080 | struct manager *mgr; | |
1081 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
1082 | int ret = -EINVAL; | |
1083 | ||
1084 | mgr = container_of(ch, struct manager, ch); | |
1085 | if (*debug & DEBUG_L2_RECV) | |
1086 | printk(KERN_DEBUG "%s: prim(%x) id(%x)\n", | |
1087 | __func__, hh->prim, hh->id); | |
1088 | switch (hh->prim) { | |
1089 | case PH_DATA_IND: | |
1090 | mISDN_FsmEvent(&mgr->deact, EV_UI, NULL); | |
1091 | ret = ph_data_ind(mgr, skb); | |
1092 | break; | |
1093 | case PH_DATA_CNF: | |
1094 | do_ack(mgr, hh->id); | |
1095 | ret = 0; | |
1096 | break; | |
1097 | case PH_ACTIVATE_IND: | |
1098 | test_and_set_bit(MGR_PH_ACTIVE, &mgr->options); | |
1099 | mISDN_FsmEvent(&mgr->deact, EV_ACTIVATE_IND, NULL); | |
1100 | do_send(mgr); | |
1101 | ret = 0; | |
1102 | break; | |
1103 | case PH_DEACTIVATE_IND: | |
1104 | test_and_clear_bit(MGR_PH_ACTIVE, &mgr->options); | |
1105 | mISDN_FsmEvent(&mgr->deact, EV_DEACTIVATE_IND, NULL); | |
1106 | ret = 0; | |
1107 | break; | |
1108 | case DL_UNITDATA_REQ: | |
1109 | return dl_unit_data(mgr, skb); | |
1110 | } | |
1111 | if (!ret) | |
1112 | dev_kfree_skb(skb); | |
1113 | return ret; | |
1114 | } | |
1115 | ||
1116 | static int | |
1117 | free_teimanager(struct manager *mgr) | |
1118 | { | |
1119 | struct layer2 *l2, *nl2; | |
1120 | ||
e73f6b22 | 1121 | test_and_clear_bit(OPTION_L1_HOLD, &mgr->options); |
1b2b03f8 KK |
1122 | if (test_bit(MGR_OPT_NETWORK, &mgr->options)) { |
1123 | /* not locked lock is taken in release tei */ | |
1124 | mgr->up = NULL; | |
1125 | if (test_bit(OPTION_L2_CLEANUP, &mgr->options)) { | |
1126 | list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) { | |
1127 | put_tei_msg(mgr, ID_REMOVE, 0, l2->tei); | |
1128 | mutex_lock(&mgr->ch.st->lmutex); | |
1129 | list_del(&l2->ch.list); | |
1130 | mutex_unlock(&mgr->ch.st->lmutex); | |
1131 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); | |
1132 | } | |
1133 | test_and_clear_bit(MGR_OPT_NETWORK, &mgr->options); | |
1134 | } else { | |
1135 | list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) { | |
1136 | l2->up = NULL; | |
1137 | } | |
1138 | } | |
1139 | } | |
1140 | if (test_bit(MGR_OPT_USER, &mgr->options)) { | |
1141 | if (list_empty(&mgr->layer2)) | |
1142 | test_and_clear_bit(MGR_OPT_USER, &mgr->options); | |
1143 | } | |
1144 | mgr->ch.st->dev->D.ctrl(&mgr->ch.st->dev->D, CLOSE_CHANNEL, NULL); | |
1145 | return 0; | |
1146 | } | |
1147 | ||
1148 | static int | |
1149 | ctrl_teimanager(struct manager *mgr, void *arg) | |
1150 | { | |
1151 | /* currently we only have one option */ | |
e73f6b22 AE |
1152 | int *val = (int *)arg; |
1153 | int ret = 0; | |
1154 | ||
1155 | switch (val[0]) { | |
1156 | case IMCLEAR_L2: | |
1157 | if (val[1]) | |
1158 | test_and_set_bit(OPTION_L2_CLEANUP, &mgr->options); | |
1159 | else | |
1160 | test_and_clear_bit(OPTION_L2_CLEANUP, &mgr->options); | |
1161 | break; | |
1162 | case IMHOLD_L1: | |
1163 | if (val[1]) | |
1164 | test_and_set_bit(OPTION_L1_HOLD, &mgr->options); | |
1165 | else | |
1166 | test_and_clear_bit(OPTION_L1_HOLD, &mgr->options); | |
1167 | break; | |
1168 | default: | |
1169 | ret = -EINVAL; | |
1170 | } | |
1171 | return ret; | |
1b2b03f8 KK |
1172 | } |
1173 | ||
1174 | /* This function does create a L2 for fixed TEI in NT Mode */ | |
1175 | static int | |
1176 | check_data(struct manager *mgr, struct sk_buff *skb) | |
1177 | { | |
1178 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
5b277b86 | 1179 | int ret, tei, sapi; |
1b2b03f8 KK |
1180 | struct layer2 *l2; |
1181 | ||
1182 | if (*debug & DEBUG_L2_CTRL) | |
1183 | printk(KERN_DEBUG "%s: prim(%x) id(%x)\n", | |
1184 | __func__, hh->prim, hh->id); | |
1185 | if (test_bit(MGR_OPT_USER, &mgr->options)) | |
1186 | return -ENOTCONN; | |
1187 | if (hh->prim != PH_DATA_IND) | |
1188 | return -ENOTCONN; | |
1189 | if (skb->len != 3) | |
1190 | return -ENOTCONN; | |
5b277b86 AE |
1191 | if (skb->data[0] & 3) /* EA0 and CR must be 0 */ |
1192 | return -EINVAL; | |
1193 | sapi = skb->data[0] >> 2; | |
1b2b03f8 KK |
1194 | if (!(skb->data[1] & 1)) /* invalid EA1 */ |
1195 | return -EINVAL; | |
5b277b86 | 1196 | tei = skb->data[1] >> 1; |
1b2b03f8 KK |
1197 | if (tei > 63) /* not a fixed tei */ |
1198 | return -ENOTCONN; | |
1199 | if ((skb->data[2] & ~0x10) != SABME) | |
1200 | return -ENOTCONN; | |
1201 | /* We got a SABME for a fixed TEI */ | |
d796509a AE |
1202 | if (*debug & DEBUG_L2_CTRL) |
1203 | printk(KERN_DEBUG "%s: SABME sapi(%d) tei(%d)\n", | |
1204 | __func__, sapi, tei); | |
5b277b86 | 1205 | l2 = create_new_tei(mgr, tei, sapi); |
d796509a AE |
1206 | if (!l2) { |
1207 | if (*debug & DEBUG_L2_CTRL) | |
1208 | printk(KERN_DEBUG "%s: failed to create new tei\n", | |
1209 | __func__); | |
1b2b03f8 | 1210 | return -ENOMEM; |
d796509a | 1211 | } |
1b2b03f8 KK |
1212 | ret = l2->ch.send(&l2->ch, skb); |
1213 | return ret; | |
1214 | } | |
1215 | ||
1216 | void | |
1217 | delete_teimanager(struct mISDNchannel *ch) | |
1218 | { | |
1219 | struct manager *mgr; | |
1220 | struct layer2 *l2, *nl2; | |
1221 | ||
1222 | mgr = container_of(ch, struct manager, ch); | |
1223 | /* not locked lock is taken in release tei */ | |
1224 | list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) { | |
1225 | mutex_lock(&mgr->ch.st->lmutex); | |
1226 | list_del(&l2->ch.list); | |
1227 | mutex_unlock(&mgr->ch.st->lmutex); | |
1228 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); | |
1229 | } | |
1230 | list_del(&mgr->ch.list); | |
1231 | list_del(&mgr->bcast.list); | |
1232 | skb_queue_purge(&mgr->sendq); | |
1233 | kfree(mgr); | |
1234 | } | |
1235 | ||
1236 | static int | |
1237 | mgr_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
1238 | { | |
1239 | struct manager *mgr; | |
1240 | int ret = -EINVAL; | |
1241 | ||
1242 | mgr = container_of(ch, struct manager, ch); | |
1243 | if (*debug & DEBUG_L2_CTRL) | |
1244 | printk(KERN_DEBUG "%s(%x, %p)\n", __func__, cmd, arg); | |
1245 | switch (cmd) { | |
1246 | case OPEN_CHANNEL: | |
1247 | ret = create_teimgr(mgr, arg); | |
1248 | break; | |
1249 | case CLOSE_CHANNEL: | |
1250 | ret = free_teimanager(mgr); | |
1251 | break; | |
1252 | case CONTROL_CHANNEL: | |
1253 | ret = ctrl_teimanager(mgr, arg); | |
1254 | break; | |
1255 | case CHECK_DATA: | |
1256 | ret = check_data(mgr, arg); | |
1257 | break; | |
1258 | } | |
1259 | return ret; | |
1260 | } | |
1261 | ||
1262 | static int | |
1263 | mgr_bcast(struct mISDNchannel *ch, struct sk_buff *skb) | |
1264 | { | |
1265 | struct manager *mgr = container_of(ch, struct manager, bcast); | |
1266 | struct mISDNhead *hh = mISDN_HEAD_P(skb); | |
1267 | struct sk_buff *cskb = NULL; | |
1268 | struct layer2 *l2; | |
1269 | u_long flags; | |
1270 | int ret; | |
1271 | ||
1272 | read_lock_irqsave(&mgr->lock, flags); | |
1273 | list_for_each_entry(l2, &mgr->layer2, list) { | |
1274 | if ((hh->id & MISDN_ID_SAPI_MASK) == | |
1275 | (l2->ch.addr & MISDN_ID_SAPI_MASK)) { | |
1276 | if (list_is_last(&l2->list, &mgr->layer2)) { | |
1277 | cskb = skb; | |
1278 | skb = NULL; | |
1279 | } else { | |
1280 | if (!cskb) | |
1281 | cskb = skb_copy(skb, GFP_KERNEL); | |
1282 | } | |
1283 | if (cskb) { | |
1284 | ret = l2->ch.send(&l2->ch, cskb); | |
1285 | if (ret) { | |
1286 | if (*debug & DEBUG_SEND_ERR) | |
1287 | printk(KERN_DEBUG | |
1288 | "%s ch%d prim(%x) addr(%x)" | |
1289 | " err %d\n", | |
1290 | __func__, l2->ch.nr, | |
1291 | hh->prim, l2->ch.addr, ret); | |
1292 | } else | |
1293 | cskb = NULL; | |
1294 | } else { | |
1295 | printk(KERN_WARNING "%s ch%d addr %x no mem\n", | |
1296 | __func__, ch->nr, ch->addr); | |
1297 | goto out; | |
1298 | } | |
1299 | } | |
1300 | } | |
1301 | out: | |
1302 | read_unlock_irqrestore(&mgr->lock, flags); | |
1303 | if (cskb) | |
1304 | dev_kfree_skb(cskb); | |
1305 | if (skb) | |
1306 | dev_kfree_skb(skb); | |
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | static int | |
1311 | mgr_bcast_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg) | |
1312 | { | |
1313 | ||
1314 | return -EINVAL; | |
1315 | } | |
1316 | ||
1317 | int | |
1318 | create_teimanager(struct mISDNdevice *dev) | |
1319 | { | |
1320 | struct manager *mgr; | |
1321 | ||
1322 | mgr = kzalloc(sizeof(struct manager), GFP_KERNEL); | |
1323 | if (!mgr) | |
1324 | return -ENOMEM; | |
1325 | INIT_LIST_HEAD(&mgr->layer2); | |
702c7904 | 1326 | rwlock_init(&mgr->lock); |
1b2b03f8 KK |
1327 | skb_queue_head_init(&mgr->sendq); |
1328 | mgr->nextid = 1; | |
1329 | mgr->lastid = MISDN_ID_NONE; | |
1330 | mgr->ch.send = mgr_send; | |
1331 | mgr->ch.ctrl = mgr_ctrl; | |
1332 | mgr->ch.st = dev->D.st; | |
1333 | set_channel_address(&mgr->ch, TEI_SAPI, GROUP_TEI); | |
1334 | add_layer2(&mgr->ch, dev->D.st); | |
1335 | mgr->bcast.send = mgr_bcast; | |
1336 | mgr->bcast.ctrl = mgr_bcast_ctrl; | |
1337 | mgr->bcast.st = dev->D.st; | |
1338 | set_channel_address(&mgr->bcast, 0, GROUP_TEI); | |
1339 | add_layer2(&mgr->bcast, dev->D.st); | |
1340 | mgr->deact.debug = *debug & DEBUG_MANAGER; | |
1341 | mgr->deact.userdata = mgr; | |
1342 | mgr->deact.printdebug = da_debug; | |
1343 | mgr->deact.fsm = &deactfsm; | |
1344 | mgr->deact.state = ST_L1_DEACT; | |
1345 | mISDN_FsmInitTimer(&mgr->deact, &mgr->datimer); | |
1346 | dev->teimgr = &mgr->ch; | |
1347 | return 0; | |
1348 | } | |
1349 | ||
1350 | int TEIInit(u_int *deb) | |
1351 | { | |
1352 | debug = deb; | |
1353 | teifsmu.state_count = TEI_STATE_COUNT; | |
1354 | teifsmu.event_count = TEI_EVENT_COUNT; | |
1355 | teifsmu.strEvent = strTeiEvent; | |
1356 | teifsmu.strState = strTeiState; | |
1357 | mISDN_FsmNew(&teifsmu, TeiFnListUser, ARRAY_SIZE(TeiFnListUser)); | |
1358 | teifsmn.state_count = TEI_STATE_COUNT; | |
1359 | teifsmn.event_count = TEI_EVENT_COUNT; | |
1360 | teifsmn.strEvent = strTeiEvent; | |
1361 | teifsmn.strState = strTeiState; | |
1362 | mISDN_FsmNew(&teifsmn, TeiFnListNet, ARRAY_SIZE(TeiFnListNet)); | |
1363 | deactfsm.state_count = DEACT_STATE_COUNT; | |
1364 | deactfsm.event_count = DEACT_EVENT_COUNT; | |
1365 | deactfsm.strEvent = strDeactEvent; | |
1366 | deactfsm.strState = strDeactState; | |
1367 | mISDN_FsmNew(&deactfsm, DeactFnList, ARRAY_SIZE(DeactFnList)); | |
1368 | return 0; | |
1369 | } | |
1370 | ||
1371 | void TEIFree(void) | |
1372 | { | |
1373 | mISDN_FsmFree(&teifsmu); | |
1374 | mISDN_FsmFree(&teifsmn); | |
1375 | mISDN_FsmFree(&deactfsm); | |
1376 | } |