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1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1b2b03f8 KK |
2 | /* |
3 | * | |
4 | * Author Karsten Keil <kkeil@novell.com> | |
5 | * | |
6 | * Copyright 2008 by Karsten Keil <kkeil@novell.com> | |
1b2b03f8 KK |
7 | */ |
8 | #include "layer2.h" | |
9 | #include <linux/random.h> | |
5a0e3ad6 | 10 | #include <linux/slab.h> |
1b2b03f8 KK |
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 | ||
475be4d8 | 28 | static u_int *debug; |
1b2b03f8 KK |
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 | }; | |
475be4d8 | 39 | #define DEACT_STATE_COUNT (ST_L1_ACTIV + 1) |
1b2b03f8 KK |
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 | ||
475be4d8 | 57 | #define DEACT_EVENT_COUNT (EV_DATIMER + 1) |
1b2b03f8 KK |
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; | |
020f01eb | 73 | struct va_format vaf; |
1b2b03f8 KK |
74 | va_list va; |
75 | ||
76 | if (!(*debug & DEBUG_L2_TEIFSM)) | |
77 | return; | |
020f01eb | 78 | |
1b2b03f8 | 79 | va_start(va, fmt); |
020f01eb JP |
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 | ||
1b2b03f8 KK |
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 */ | |
e73f6b22 AE |
122 | if (!test_bit(OPTION_L1_HOLD, &mgr->options)) { |
123 | mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER, | |
475be4d8 | 124 | NULL, 1); |
e73f6b22 AE |
125 | mISDN_FsmChangeState(fi, ST_L1_DEACT_PENDING); |
126 | } | |
1b2b03f8 KK |
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 */ | |
e73f6b22 AE |
135 | if (!test_bit(OPTION_L1_HOLD, &mgr->options)) { |
136 | mISDN_FsmDelTimer(&mgr->datimer, 2); | |
137 | mISDN_FsmAddTimer(&mgr->datimer, DATIMER_VAL, EV_DATIMER, | |
475be4d8 | 138 | NULL, 2); |
e73f6b22 | 139 | } |
1b2b03f8 KK |
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(&mgr->ch, PH_DEACTIVATE_REQ, MISDN_ID_ANY, 0, NULL, | |
475be4d8 | 163 | GFP_ATOMIC); |
1b2b03f8 KK |
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 | ||
475be4d8 | 182 | #define TEI_STATE_COUNT (ST_TEI_IDVERIFY + 1) |
1b2b03f8 KK |
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 | ||
475be4d8 | 203 | #define TEI_EVENT_COUNT (EV_TIMER + 1) |
1b2b03f8 KK |
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; | |
020f01eb | 222 | struct va_format vaf; |
1b2b03f8 KK |
223 | va_list va; |
224 | ||
225 | if (!(*debug & DEBUG_L2_TEIFSM)) | |
226 | return; | |
020f01eb | 227 | |
1b2b03f8 | 228 | va_start(va, fmt); |
020f01eb JP |
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 | ||
1b2b03f8 KK |
236 | va_end(va); |
237 | } | |
238 | ||
239 | ||
240 | ||
241 | static int | |
242 | get_free_id(struct manager *mgr) | |
243 | { | |
481af03b | 244 | DECLARE_BITMAP(ids, 64) = { [0 ... BITS_TO_LONGS(64) - 1] = 0 }; |
1b2b03f8 KK |
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 | |
475be4d8 JP |
251 | "%s: more as 63 layer2 for one device\n", |
252 | __func__); | |
1b2b03f8 KK |
253 | return -EBUSY; |
254 | } | |
481af03b | 255 | __set_bit(l2->ch.nr, ids); |
1b2b03f8 | 256 | } |
481af03b AM |
257 | i = find_next_zero_bit(ids, 64, 1); |
258 | if (i < 64) | |
259 | return i; | |
1b2b03f8 | 260 | printk(KERN_WARNING "%s: more as 63 layer2 for one device\n", |
475be4d8 | 261 | __func__); |
1b2b03f8 KK |
262 | return -EBUSY; |
263 | } | |
264 | ||
265 | static int | |
266 | get_free_tei(struct manager *mgr) | |
267 | { | |
481af03b | 268 | DECLARE_BITMAP(ids, 64) = { [0 ... BITS_TO_LONGS(64) - 1] = 0 }; |
1b2b03f8 KK |
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 | ||
481af03b | 282 | __set_bit(i, ids); |
1b2b03f8 | 283 | } |
481af03b AM |
284 | i = find_first_zero_bit(ids, 64); |
285 | if (i < 64) | |
286 | return i + 64; | |
1b2b03f8 | 287 | printk(KERN_WARNING "%s: more as 63 dynamic tei for one device\n", |
475be4d8 | 288 | __func__); |
1b2b03f8 KK |
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) | |
59ae1d12 | 306 | skb_put_data(skb, arg, len); |
1b2b03f8 KK |
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, &mgr->options)) { | |
335 | struct sk_buff *skb = skb_dequeue(&mgr->sendq); | |
336 | ||
337 | if (!skb) { | |
338 | test_and_clear_bit(MGR_PH_NOTREADY, &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, &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(&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, &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(&mgr->sendq, skb); | |
377 | if (!test_bit(MGR_PH_ACTIVE, &mgr->options)) { | |
378 | _queue_data(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0, | |
475be4d8 | 379 | NULL, GFP_KERNEL); |
1b2b03f8 KK |
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(&mgr->ch, PH_ACTIVATE_REQ, MISDN_ID_ANY, 0, | |
475be4d8 | 392 | NULL, GFP_KERNEL); |
1b2b03f8 KK |
393 | skb_push(skb, 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(&mgr->sendq, skb); | |
400 | do_send(mgr); | |
401 | return 0; | |
402 | } | |
403 | ||
5b834354 | 404 | static unsigned int |
1b2b03f8 KK |
405 | random_ri(void) |
406 | { | |
407 | u16 x; | |
408 | ||
409 | get_random_bytes(&x, 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 | |
5b277b86 | 432 | put_tei_msg(struct manager *mgr, u_char m_id, unsigned int ri, int tei) |
1b2b03f8 KK |
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; | |
5b277b86 AE |
446 | bp[7] = ((tei << 1) & 0xff) | 1; |
447 | skb = _alloc_mISDN_skb(PH_DATA_REQ, new_id(mgr), 8, bp, GFP_ATOMIC); | |
1b2b03f8 KK |
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, | |
475be4d8 JP |
462 | "assign request for already assigned tei %d", |
463 | tm->l2->tei); | |
1b2b03f8 KK |
464 | return; |
465 | } | |
466 | tm->ri = random_ri(); | |
467 | if (*debug & DEBUG_L2_TEI) | |
468 | tm->tei_m.printdebug(&tm->tei_m, | |
475be4d8 | 469 | "assign request ri %d", tm->ri); |
1b2b03f8 KK |
470 | put_tei_msg(tm->mgr, ID_REQUEST, 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", | |
475be4d8 | 490 | ri, tei); |
1b2b03f8 KK |
491 | l2 = findtei(tm->mgr, tei); |
492 | if (l2) { /* same tei is in use */ | |
493 | if (ri != l2->tm->ri) { | |
494 | tm->tei_m.printdebug(fi, | |
475be4d8 | 495 | "possible duplicate assignment tei %d", tei); |
1b2b03f8 KK |
496 | tei_l2(l2, MDL_ERROR_RSP, 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, 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", | |
475be4d8 | 519 | ri, tei); |
1b2b03f8 KK |
520 | l2 = findtei(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, | |
475be4d8 | 524 | "possible duplicate assignment tei %d", tei); |
1b2b03f8 KK |
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", | |
475be4d8 | 543 | ri, tei); |
1b2b03f8 KK |
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 | ||
475be4d8 | 553 | tei = *(dp + 3) >> 1; |
1b2b03f8 KK |
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) || | |
475be4d8 | 557 | (tei == tm->l2->tei))) { |
1b2b03f8 KK |
558 | mISDN_FsmDelTimer(&tm->timer, 4); |
559 | mISDN_FsmChangeState(&tm->tei_m, ST_TEI_NOP); | |
560 | put_tei_msg(tm->mgr, ID_CHK_RES, random_ri(), 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 | ||
475be4d8 | 571 | tei = *(dp + 3) >> 1; |
1b2b03f8 KK |
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, 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", | |
475be4d8 | 589 | tm->l2->tei); |
1b2b03f8 KK |
590 | put_tei_msg(tm->mgr, ID_VERIFY, 0, 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", | |
475be4d8 | 605 | 4 - tm->nval, tm->ri); |
1b2b03f8 KK |
606 | put_tei_msg(tm->mgr, ID_REQUEST, 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, 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, | |
475be4d8 JP |
623 | "id verify req(%d) for tei %d", |
624 | 3 - tm->nval, tm->l2->tei); | |
1b2b03f8 KK |
625 | put_tei_msg(tm->mgr, ID_VERIFY, 0, 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", | |
475be4d8 | 629 | tm->l2->tei); |
1b2b03f8 KK |
630 | tei_l2(tm->l2, MDL_REMOVE_REQ, 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(l2->tm->mgr, ID_REMOVE, 0, l2->tei); | |
654 | tei_l2(l2, MDL_REMOVE_REQ, 0); | |
655 | list_del(&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, | |
475be4d8 | 667 | "net tei assign request without tei"); |
1b2b03f8 KK |
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, | |
475be4d8 | 674 | "net assign request ri %d teim %d", tm->ri, *dp); |
1b2b03f8 KK |
675 | put_tei_msg(tm->mgr, ID_ASSIGNED, tm->ri, 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", | |
475be4d8 | 686 | tm->l2->tei); |
1b2b03f8 KK |
687 | tm->rcnt = 0; |
688 | put_tei_msg(tm->mgr, ID_CHK_REQ, 0, 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", | |
475be4d8 | 718 | tei, tm->l2->tei); |
1b2b03f8 KK |
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, | |
475be4d8 | 731 | "check req for tei %d successful\n", tm->l2->tei); |
1b2b03f8 KK |
732 | mISDN_FsmChangeState(fi, ST_TEI_NOP); |
733 | } else if (tm->rcnt > 1) { | |
734 | /* duplicate assignment; remove */ | |
735 | tei_l2remove(tm->l2); | |
736 | } else if (--tm->nval) { | |
737 | if (*debug & DEBUG_L2_TEI) | |
738 | tm->tei_m.printdebug(fi, | |
475be4d8 JP |
739 | "id check req(%d) for tei %d", |
740 | 3 - tm->nval, tm->l2->tei); | |
1b2b03f8 KK |
741 | put_tei_msg(tm->mgr, ID_CHK_REQ, 0, 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", | |
475be4d8 | 745 | tm->l2->tei); |
1b2b03f8 KK |
746 | mISDN_FsmChangeState(fi, ST_TEI_NOP); |
747 | tei_l2remove(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 * | |
5b277b86 | 782 | create_new_tei(struct manager *mgr, int tei, int sapi) |
1b2b03f8 | 783 | { |
7ed80fe4 KK |
784 | unsigned long opt = 0; |
785 | unsigned long flags; | |
786 | int id; | |
787 | struct layer2 *l2; | |
788 | struct channel_req rq; | |
1b2b03f8 KK |
789 | |
790 | if (!mgr->up) | |
791 | return NULL; | |
5b277b86 | 792 | if ((tei >= 0) && (tei < 64)) |
1b2b03f8 | 793 | test_and_set_bit(OPTION_L2_FIXEDTEI, &opt); |
7ed80fe4 KK |
794 | if (mgr->ch.st->dev->Dprotocols & ((1 << ISDN_P_TE_E1) | |
795 | (1 << ISDN_P_NT_E1))) { | |
1b2b03f8 | 796 | test_and_set_bit(OPTION_L2_PMX, &opt); |
7ed80fe4 KK |
797 | rq.protocol = ISDN_P_NT_E1; |
798 | } else { | |
799 | rq.protocol = ISDN_P_NT_S0; | |
800 | } | |
5b277b86 | 801 | l2 = create_l2(mgr->up, ISDN_P_LAPD_NT, opt, tei, sapi); |
1b2b03f8 KK |
802 | if (!l2) { |
803 | printk(KERN_WARNING "%s:no memory for layer2\n", __func__); | |
804 | return NULL; | |
805 | } | |
806 | l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL); | |
807 | if (!l2->tm) { | |
808 | kfree(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(&l2->list, &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); | |
7ed80fe4 KK |
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 | } | |
1b2b03f8 KK |
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; | |
5b277b86 AE |
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); | |
1b2b03f8 KK |
863 | if (tei < 0) { |
864 | printk(KERN_WARNING "%s:No free tei\n", __func__); | |
865 | goto denied; | |
866 | } | |
5b277b86 | 867 | l2 = create_new_tei(mgr, tei, CTRL_SAPI); |
1b2b03f8 KK |
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; | |
8164491d | 881 | struct layer2 *l2, *nl2; |
1b2b03f8 KK |
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", | |
475be4d8 | 887 | __func__, skb->len); |
1b2b03f8 KK |
888 | goto done; |
889 | } | |
1b2b03f8 KK |
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, &skb->data[4]); | |
924 | goto done; | |
925 | } | |
8164491d | 926 | list_for_each_entry_safe(l2, nl2, &mgr->layer2, list) { |
1b2b03f8 KK |
927 | tei_ph_data_ind(l2->tm, mt, &skb->data[4], skb->len - 4); |
928 | } | |
1b2b03f8 KK |
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 | |
c5b61d59 | 969 | TEIrelease(struct layer2 *l2) |
1b2b03f8 KK |
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(&l2->list); | |
977 | write_unlock_irqrestore(&tm->mgr->lock, flags); | |
978 | l2->tm = NULL; | |
979 | kfree(tm); | |
980 | } | |
981 | ||
982 | static int | |
983 | create_teimgr(struct manager *mgr, struct channel_req *crq) | |
984 | { | |
7ed80fe4 KK |
985 | struct layer2 *l2; |
986 | unsigned long opt = 0; | |
987 | unsigned long flags; | |
988 | int id; | |
989 | struct channel_req l1rq; | |
1b2b03f8 KK |
990 | |
991 | if (*debug & DEBUG_L2_TEI) | |
992 | printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n", | |
475be4d8 JP |
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); | |
1b2b03f8 KK |
996 | if (crq->adr.tei > GROUP_TEI) |
997 | return -EINVAL; | |
998 | if (crq->adr.tei < 64) | |
999 | test_and_set_bit(OPTION_L2_FIXEDTEI, &opt); | |
1000 | if (crq->adr.tei == 0) | |
1001 | test_and_set_bit(OPTION_L2_PTP, &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 | |
475be4d8 JP |
1009 | "%s: only one network manager is allowed\n", |
1010 | __func__); | |
1b2b03f8 KK |
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, &mgr->options); | |
1021 | if (crq->protocol == ISDN_P_LAPD_TE) | |
1022 | test_and_set_bit(MGR_OPT_USER, &mgr->options); | |
1023 | } | |
7ed80fe4 | 1024 | l1rq.adr = crq->adr; |
1b2b03f8 | 1025 | if (mgr->ch.st->dev->Dprotocols |
475be4d8 | 1026 | & ((1 << ISDN_P_TE_E1) | (1 << ISDN_P_NT_E1))) |
1b2b03f8 KK |
1027 | test_and_set_bit(OPTION_L2_PMX, &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, sizeof(id), &id); | |
82107b73 AE |
1032 | if (test_bit(MGR_PH_ACTIVE, &mgr->options)) |
1033 | teiup_create(mgr, PH_ACTIVATE_IND, 0, NULL); | |
1b2b03f8 KK |
1034 | crq->ch = NULL; |
1035 | if (!list_empty(&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 | } | |
5b277b86 | 1045 | l2 = create_l2(crq->ch, crq->protocol, opt, |
475be4d8 | 1046 | crq->adr.tei, crq->adr.sapi); |
1b2b03f8 KK |
1047 | if (!l2) |
1048 | return -ENOMEM; | |
1049 | l2->tm = kzalloc(sizeof(struct teimgr), GFP_KERNEL); | |
1050 | if (!l2->tm) { | |
1051 | kfree(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 */ | |
7ed80fe4 KK |
1064 | if (test_bit(OPTION_L2_PMX, &opt)) |
1065 | l1rq.protocol = ISDN_P_TE_E1; | |
1066 | else | |
1067 | l1rq.protocol = ISDN_P_TE_S0; | |
1b2b03f8 KK |
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 */ | |
7ed80fe4 KK |
1072 | if (test_bit(OPTION_L2_PMX, &opt)) |
1073 | l1rq.protocol = ISDN_P_NT_E1; | |
1074 | else | |
1075 | l1rq.protocol = ISDN_P_NT_S0; | |
1b2b03f8 KK |
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(&l2->list, &mgr->layer2); | |
1081 | write_unlock_irqrestore(&mgr->lock, flags); | |
7ed80fe4 | 1082 | if (id >= 0) { |
1b2b03f8 KK |
1083 | l2->ch.nr = id; |
1084 | l2->up->nr = id; | |
1085 | crq->ch = &l2->ch; | |
7ed80fe4 KK |
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); | |
1b2b03f8 | 1089 | } |
7ed80fe4 KK |
1090 | if (id < 0) |
1091 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); | |
1b2b03f8 KK |
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", | |
475be4d8 | 1105 | __func__, hh->prim, hh->id); |
1b2b03f8 KK |
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, hh->id); | |
1113 | ret = 0; | |
1114 | break; | |
1115 | case PH_ACTIVATE_IND: | |
1116 | test_and_set_bit(MGR_PH_ACTIVE, &mgr->options); | |
82107b73 AE |
1117 | if (mgr->up) |
1118 | teiup_create(mgr, PH_ACTIVATE_IND, 0, NULL); | |
1b2b03f8 KK |
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, &mgr->options); | |
82107b73 AE |
1125 | if (mgr->up) |
1126 | teiup_create(mgr, PH_DEACTIVATE_IND, 0, NULL); | |
1b2b03f8 KK |
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 | ||
e73f6b22 | 1143 | test_and_clear_bit(OPTION_L1_HOLD, &mgr->options); |
1b2b03f8 KK |
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, 0, l2->tei); | |
1150 | mutex_lock(&mgr->ch.st->lmutex); | |
1151 | list_del(&l2->ch.list); | |
1152 | mutex_unlock(&mgr->ch.st->lmutex); | |
1153 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); | |
1154 | } | |
1155 | test_and_clear_bit(MGR_OPT_NETWORK, &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(&mgr->layer2)) | |
1164 | test_and_clear_bit(MGR_OPT_USER, &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 */ | |
aeb5e02a | 1174 | unsigned int *val = (unsigned int *)arg; |
e73f6b22 AE |
1175 | |
1176 | switch (val[0]) { | |
1177 | case IMCLEAR_L2: | |
1178 | if (val[1]) | |
1179 | test_and_set_bit(OPTION_L2_CLEANUP, &mgr->options); | |
1180 | else | |
1181 | test_and_clear_bit(OPTION_L2_CLEANUP, &mgr->options); | |
1182 | break; | |
1183 | case IMHOLD_L1: | |
1184 | if (val[1]) | |
1185 | test_and_set_bit(OPTION_L1_HOLD, &mgr->options); | |
1186 | else | |
1187 | test_and_clear_bit(OPTION_L1_HOLD, &mgr->options); | |
1188 | break; | |
1189 | default: | |
aeb5e02a | 1190 | return -EINVAL; |
e73f6b22 | 1191 | } |
aeb5e02a | 1192 | return 0; |
1b2b03f8 KK |
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); | |
5b277b86 | 1200 | int ret, tei, sapi; |
1b2b03f8 KK |
1201 | struct layer2 *l2; |
1202 | ||
1203 | if (*debug & DEBUG_L2_CTRL) | |
1204 | printk(KERN_DEBUG "%s: prim(%x) id(%x)\n", | |
475be4d8 | 1205 | __func__, hh->prim, hh->id); |
1b2b03f8 KK |
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; | |
5b277b86 AE |
1212 | if (skb->data[0] & 3) /* EA0 and CR must be 0 */ |
1213 | return -EINVAL; | |
1214 | sapi = skb->data[0] >> 2; | |
1b2b03f8 KK |
1215 | if (!(skb->data[1] & 1)) /* invalid EA1 */ |
1216 | return -EINVAL; | |
5b277b86 | 1217 | tei = skb->data[1] >> 1; |
1b2b03f8 KK |
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 */ | |
d796509a AE |
1223 | if (*debug & DEBUG_L2_CTRL) |
1224 | printk(KERN_DEBUG "%s: SABME sapi(%d) tei(%d)\n", | |
475be4d8 | 1225 | __func__, sapi, tei); |
5b277b86 | 1226 | l2 = create_new_tei(mgr, tei, sapi); |
d796509a AE |
1227 | if (!l2) { |
1228 | if (*debug & DEBUG_L2_CTRL) | |
1229 | printk(KERN_DEBUG "%s: failed to create new tei\n", | |
475be4d8 | 1230 | __func__); |
1b2b03f8 | 1231 | return -ENOMEM; |
d796509a | 1232 | } |
1b2b03f8 KK |
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(&l2->ch.list); | |
1248 | mutex_unlock(&mgr->ch.st->lmutex); | |
1249 | l2->ch.ctrl(&l2->ch, CLOSE_CHANNEL, NULL); | |
1250 | } | |
1251 | list_del(&mgr->ch.list); | |
1252 | list_del(&mgr->bcast.list); | |
1253 | skb_queue_purge(&mgr->sendq); | |
1254 | kfree(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, 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, 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); | |
8423e6b2 | 1287 | struct mISDNhead *hhc, *hh = mISDN_HEAD_P(skb); |
1b2b03f8 KK |
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(&l2->list, &mgr->layer2)) { | |
1298 | cskb = skb; | |
1299 | skb = NULL; | |
1300 | } else { | |
1301 | if (!cskb) | |
8423e6b2 | 1302 | cskb = skb_copy(skb, GFP_ATOMIC); |
1b2b03f8 KK |
1303 | } |
1304 | if (cskb) { | |
8423e6b2 KK |
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); | |
1b2b03f8 KK |
1313 | if (ret) { |
1314 | if (*debug & DEBUG_SEND_ERR) | |
1315 | printk(KERN_DEBUG | |
475be4d8 JP |
1316 | "%s ch%d prim(%x) addr(%x)" |
1317 | " err %d\n", | |
1318 | __func__, l2->ch.nr, | |
1319 | hh->prim, l2->ch.addr, ret); | |
1b2b03f8 KK |
1320 | } else |
1321 | cskb = NULL; | |
1322 | } else { | |
1323 | printk(KERN_WARNING "%s ch%d addr %x no mem\n", | |
475be4d8 | 1324 | __func__, ch->nr, ch->addr); |
1b2b03f8 KK |
1325 | goto out; |
1326 | } | |
1327 | } | |
1328 | } | |
1329 | out: | |
1330 | read_unlock_irqrestore(&mgr->lock, flags); | |
0f817a5e ME |
1331 | dev_kfree_skb(cskb); |
1332 | dev_kfree_skb(skb); | |
1b2b03f8 KK |
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(sizeof(struct manager), GFP_KERNEL); | |
1349 | if (!mgr) | |
1350 | return -ENOMEM; | |
1351 | INIT_LIST_HEAD(&mgr->layer2); | |
702c7904 | 1352 | rwlock_init(&mgr->lock); |
1b2b03f8 KK |
1353 | skb_queue_head_init(&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 | { | |
54a6a043 | 1378 | int res; |
1b2b03f8 KK |
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; | |
54a6a043 AV |
1384 | res = mISDN_FsmNew(&teifsmu, TeiFnListUser, ARRAY_SIZE(TeiFnListUser)); |
1385 | if (res) | |
1386 | goto error; | |
1b2b03f8 KK |
1387 | teifsmn.state_count = TEI_STATE_COUNT; |
1388 | teifsmn.event_count = TEI_EVENT_COUNT; | |
1389 | teifsmn.strEvent = strTeiEvent; | |
1390 | teifsmn.strState = strTeiState; | |
54a6a043 AV |
1391 | res = mISDN_FsmNew(&teifsmn, TeiFnListNet, ARRAY_SIZE(TeiFnListNet)); |
1392 | if (res) | |
1393 | goto error_smn; | |
1b2b03f8 KK |
1394 | deactfsm.state_count = DEACT_STATE_COUNT; |
1395 | deactfsm.event_count = DEACT_EVENT_COUNT; | |
1396 | deactfsm.strEvent = strDeactEvent; | |
1397 | deactfsm.strState = strDeactState; | |
54a6a043 AV |
1398 | res = mISDN_FsmNew(&deactfsm, DeactFnList, ARRAY_SIZE(DeactFnList)); |
1399 | if (res) | |
1400 | goto error_deact; | |
1b2b03f8 | 1401 | return 0; |
54a6a043 AV |
1402 | |
1403 | error_deact: | |
1404 | mISDN_FsmFree(&teifsmn); | |
1405 | error_smn: | |
1406 | mISDN_FsmFree(&teifsmu); | |
1407 | error: | |
1408 | return res; | |
1b2b03f8 KK |
1409 | } |
1410 | ||
1411 | void TEIFree(void) | |
1412 | { | |
1413 | mISDN_FsmFree(&teifsmu); | |
1414 | mISDN_FsmFree(&teifsmn); | |
1415 | mISDN_FsmFree(&deactfsm); | |
1416 | } |