1 /* $Id: isdnl3.c,v 2.22.2.3 2004/01/13 14:31:25 keil Exp $
4 * based on the teles driver from Jan den Ouden
5 * Copyright by Karsten Keil <keil@isdn4linux.de>
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
10 * For changes and modifications please read
11 * Documentation/isdn/HiSax.cert
13 * Thanks to Jan den Ouden
18 #include <linux/init.h>
22 const char *l3_revision = "$Revision: 2.22.2.3 $";
24 static struct Fsm l3fsm;
34 #define L3_STATE_COUNT (ST_L3_LC_ESTAB+1)
36 static char *strL3State[] =
39 "ST_L3_LC_ESTAB_WAIT",
55 #define L3_EVENT_COUNT (EV_TIMEOUT+1)
57 static char *strL3Event[] =
69 l3m_debug(struct FsmInst *fi, char *fmt, ...)
72 struct PStack *st = fi->userdata;
75 VHiSax_putstatus(st->l1.hardware, st->l3.debug_id, fmt, args);
80 findie(u_char * p, int size, u_char ie, int wanted_set)
82 int l, codeset, maincodeset;
83 u_char *pend = p + size;
85 /* skip protocol discriminator, callref and message type */
92 /* while there are bytes left... */
94 if ((*p & 0xf0) == 0x90) {
97 maincodeset = codeset;
102 if (codeset == wanted_set) {
104 { /* improved length check (Werner Cornelius) */
107 if (*(p+1) > (pend - (p+2)))
118 codeset = maincodeset;
125 getcallref(u_char * p)
129 p++; /* prot discr */
130 if (*p & 0xfe) /* wrong callref BRI only 1 octet*/
132 l = 0xf & *p++; /* callref length */
133 if (!l) /* dummy CallRef */
139 static int OrigCallRef = 0;
144 if (OrigCallRef == 127)
148 return (OrigCallRef);
152 newl3state(struct l3_process *pc, int state)
154 if (pc->debug & L3_DEB_STATE)
155 l3_debug(pc->st, "newstate cr %d %d --> %d",
162 L3ExpireTimer(struct L3Timer *t)
164 t->pc->st->lli.l4l3(t->pc->st, t->event, t->pc);
168 L3InitTimer(struct l3_process *pc, struct L3Timer *t)
171 t->tl.function = (void *) L3ExpireTimer;
172 t->tl.data = (long) t;
177 L3DelTimer(struct L3Timer *t)
183 L3AddTimer(struct L3Timer *t,
184 int millisec, int event)
186 if (timer_pending(&t->tl)) {
187 printk(KERN_WARNING "L3AddTimer: timer already active!\n");
192 t->tl.expires = jiffies + (millisec * HZ) / 1000;
198 StopAllL3Timer(struct l3_process *pc)
200 L3DelTimer(&pc->timer);
204 l3_alloc_skb(int len)
208 if (!(skb = alloc_skb(len + MAX_HEADER_LEN, GFP_ATOMIC))) {
209 printk(KERN_WARNING "HiSax: No skb for D-channel\n");
212 skb_reserve(skb, MAX_HEADER_LEN);
217 no_l3_proto(struct PStack *st, int pr, void *arg)
219 struct sk_buff *skb = arg;
221 HiSax_putstatus(st->l1.hardware, "L3", "no D protocol");
228 no_l3_proto_spec(struct PStack *st, isdn_ctrl *ic)
230 printk(KERN_WARNING "HiSax: no specific protocol handler for proto %lu\n",ic->arg & 0xFF);
234 #ifdef CONFIG_HISAX_EURO
235 extern void setstack_dss1(struct PStack *st);
238 #ifdef CONFIG_HISAX_NI1
239 extern void setstack_ni1(struct PStack *st);
242 #ifdef CONFIG_HISAX_1TR6
243 extern void setstack_1tr6(struct PStack *st);
247 *getl3proc(struct PStack *st, int cr)
249 struct l3_process *p = st->l3.proc;
252 if (p->callref == cr)
260 *new_l3_process(struct PStack *st, int cr)
262 struct l3_process *p, *np;
264 if (!(p = kmalloc(sizeof(struct l3_process), GFP_ATOMIC))) {
265 printk(KERN_ERR "HiSax can't get memory for cr %d\n", cr);
277 p->debug = st->l3.debug;
282 p->N303 = st->l3.N303;
283 L3InitTimer(p, &p->timer);
288 release_l3_process(struct l3_process *p)
290 struct l3_process *np, *pp = NULL;
300 else if (!(p->st->l3.proc = np->next) &&
301 !test_bit(FLG_PTP, &p->st->l2.flag)) {
303 l3_debug(p->st, "release_l3_process: last process");
304 if (skb_queue_empty(&p->st->l3.squeue)) {
306 l3_debug(p->st, "release_l3_process: release link");
307 if (p->st->protocol != ISDN_PTYPE_NI1)
308 FsmEvent(&p->st->l3.l3m, EV_RELEASE_REQ, NULL);
310 FsmEvent(&p->st->l3.l3m, EV_RELEASE_IND, NULL);
313 l3_debug(p->st, "release_l3_process: not release link");
322 printk(KERN_ERR "HiSax internal L3 error CR(%d) not in list\n", p->callref);
323 l3_debug(p->st, "HiSax internal L3 error CR(%d) not in list", p->callref);
327 l3ml3p(struct PStack *st, int pr)
329 struct l3_process *p = st->l3.proc;
330 struct l3_process *np;
333 /* p might be kfreed under us, so we need to save where we want to go on */
335 st->l3.l3ml3(st, pr, p);
341 setstack_l3dc(struct PStack *st, struct Channel *chanp)
346 st->l3.global = NULL;
347 skb_queue_head_init(&st->l3.squeue);
348 st->l3.l3m.fsm = &l3fsm;
349 st->l3.l3m.state = ST_L3_LC_REL;
350 st->l3.l3m.debug = 1;
351 st->l3.l3m.userdata = st;
352 st->l3.l3m.userint = 0;
353 st->l3.l3m.printdebug = l3m_debug;
354 FsmInitTimer(&st->l3.l3m, &st->l3.l3m_timer);
355 strcpy(st->l3.debug_id, "L3DC ");
356 st->lli.l4l3_proto = no_l3_proto_spec;
358 #ifdef CONFIG_HISAX_EURO
359 if (st->protocol == ISDN_PTYPE_EURO) {
363 #ifdef CONFIG_HISAX_NI1
364 if (st->protocol == ISDN_PTYPE_NI1) {
368 #ifdef CONFIG_HISAX_1TR6
369 if (st->protocol == ISDN_PTYPE_1TR6) {
373 if (st->protocol == ISDN_PTYPE_LEASED) {
374 st->lli.l4l3 = no_l3_proto;
375 st->l2.l2l3 = no_l3_proto;
376 st->l3.l3ml3 = no_l3_proto;
377 printk(KERN_INFO "HiSax: Leased line mode\n");
379 st->lli.l4l3 = no_l3_proto;
380 st->l2.l2l3 = no_l3_proto;
381 st->l3.l3ml3 = no_l3_proto;
382 sprintf(tmp, "protocol %s not supported",
383 (st->protocol == ISDN_PTYPE_1TR6) ? "1tr6" :
384 (st->protocol == ISDN_PTYPE_EURO) ? "euro" :
385 (st->protocol == ISDN_PTYPE_NI1) ? "ni1" :
387 printk(KERN_WARNING "HiSax: %s\n", tmp);
393 isdnl3_trans(struct PStack *st, int pr, void *arg) {
394 st->l3.l3l2(st, pr, arg);
398 releasestack_isdnl3(struct PStack *st)
401 release_l3_process(st->l3.proc);
403 StopAllL3Timer(st->l3.global);
404 kfree(st->l3.global);
405 st->l3.global = NULL;
407 FsmDelTimer(&st->l3.l3m_timer, 54);
408 skb_queue_purge(&st->l3.squeue);
412 setstack_l3bc(struct PStack *st, struct Channel *chanp)
416 st->l3.global = NULL;
417 skb_queue_head_init(&st->l3.squeue);
418 st->l3.l3m.fsm = &l3fsm;
419 st->l3.l3m.state = ST_L3_LC_REL;
420 st->l3.l3m.debug = 1;
421 st->l3.l3m.userdata = st;
422 st->l3.l3m.userint = 0;
423 st->l3.l3m.printdebug = l3m_debug;
424 strcpy(st->l3.debug_id, "L3BC ");
425 st->lli.l4l3 = isdnl3_trans;
428 #define DREL_TIMER_VALUE 40000
431 lc_activate(struct FsmInst *fi, int event, void *arg)
433 struct PStack *st = fi->userdata;
435 FsmChangeState(fi, ST_L3_LC_ESTAB_WAIT);
436 st->l3.l3l2(st, DL_ESTABLISH | REQUEST, NULL);
440 lc_connect(struct FsmInst *fi, int event, void *arg)
442 struct PStack *st = fi->userdata;
443 struct sk_buff *skb = arg;
446 FsmChangeState(fi, ST_L3_LC_ESTAB);
447 while ((skb = skb_dequeue(&st->l3.squeue))) {
448 st->l3.l3l2(st, DL_DATA | REQUEST, skb);
451 if ((!st->l3.proc) && dequeued) {
453 l3_debug(st, "lc_connect: release link");
454 FsmEvent(&st->l3.l3m, EV_RELEASE_REQ, NULL);
456 l3ml3p(st, DL_ESTABLISH | INDICATION);
460 lc_connected(struct FsmInst *fi, int event, void *arg)
462 struct PStack *st = fi->userdata;
463 struct sk_buff *skb = arg;
466 FsmDelTimer(&st->l3.l3m_timer, 51);
467 FsmChangeState(fi, ST_L3_LC_ESTAB);
468 while ((skb = skb_dequeue(&st->l3.squeue))) {
469 st->l3.l3l2(st, DL_DATA | REQUEST, skb);
472 if ((!st->l3.proc) && dequeued) {
474 l3_debug(st, "lc_connected: release link");
475 FsmEvent(&st->l3.l3m, EV_RELEASE_REQ, NULL);
477 l3ml3p(st, DL_ESTABLISH | CONFIRM);
481 lc_start_delay(struct FsmInst *fi, int event, void *arg)
483 struct PStack *st = fi->userdata;
485 FsmChangeState(fi, ST_L3_LC_REL_DELAY);
486 FsmAddTimer(&st->l3.l3m_timer, DREL_TIMER_VALUE, EV_TIMEOUT, NULL, 50);
490 lc_start_delay_check(struct FsmInst *fi, int event, void *arg)
491 /* 20/09/00 - GE timer not user for NI-1 as layer 2 should stay up */
493 struct PStack *st = fi->userdata;
495 FsmChangeState(fi, ST_L3_LC_REL_DELAY);
496 /* 19/09/00 - GE timer not user for NI-1 */
497 if (st->protocol != ISDN_PTYPE_NI1)
498 FsmAddTimer(&st->l3.l3m_timer, DREL_TIMER_VALUE, EV_TIMEOUT, NULL, 50);
502 lc_release_req(struct FsmInst *fi, int event, void *arg)
504 struct PStack *st = fi->userdata;
506 if (test_bit(FLG_L2BLOCK, &st->l2.flag)) {
508 l3_debug(st, "lc_release_req: l2 blocked");
509 /* restart release timer */
510 FsmAddTimer(&st->l3.l3m_timer, DREL_TIMER_VALUE, EV_TIMEOUT, NULL, 51);
512 FsmChangeState(fi, ST_L3_LC_REL_WAIT);
513 st->l3.l3l2(st, DL_RELEASE | REQUEST, NULL);
518 lc_release_ind(struct FsmInst *fi, int event, void *arg)
520 struct PStack *st = fi->userdata;
522 FsmDelTimer(&st->l3.l3m_timer, 52);
523 FsmChangeState(fi, ST_L3_LC_REL);
524 skb_queue_purge(&st->l3.squeue);
525 l3ml3p(st, DL_RELEASE | INDICATION);
529 lc_release_cnf(struct FsmInst *fi, int event, void *arg)
531 struct PStack *st = fi->userdata;
533 FsmChangeState(fi, ST_L3_LC_REL);
534 skb_queue_purge(&st->l3.squeue);
535 l3ml3p(st, DL_RELEASE | CONFIRM);
540 static struct FsmNode L3FnList[] __initdata =
542 {ST_L3_LC_REL, EV_ESTABLISH_REQ, lc_activate},
543 {ST_L3_LC_REL, EV_ESTABLISH_IND, lc_connect},
544 {ST_L3_LC_REL, EV_ESTABLISH_CNF, lc_connect},
545 {ST_L3_LC_ESTAB_WAIT, EV_ESTABLISH_CNF, lc_connected},
546 {ST_L3_LC_ESTAB_WAIT, EV_RELEASE_REQ, lc_start_delay},
547 {ST_L3_LC_ESTAB_WAIT, EV_RELEASE_IND, lc_release_ind},
548 {ST_L3_LC_ESTAB, EV_RELEASE_IND, lc_release_ind},
549 {ST_L3_LC_ESTAB, EV_RELEASE_REQ, lc_start_delay_check},
550 {ST_L3_LC_REL_DELAY, EV_RELEASE_IND, lc_release_ind},
551 {ST_L3_LC_REL_DELAY, EV_ESTABLISH_REQ, lc_connected},
552 {ST_L3_LC_REL_DELAY, EV_TIMEOUT, lc_release_req},
553 {ST_L3_LC_REL_WAIT, EV_RELEASE_CNF, lc_release_cnf},
554 {ST_L3_LC_REL_WAIT, EV_ESTABLISH_REQ, lc_activate},
558 #define L3_FN_COUNT (sizeof(L3FnList)/sizeof(struct FsmNode))
561 l3_msg(struct PStack *st, int pr, void *arg)
564 case (DL_DATA | REQUEST):
565 if (st->l3.l3m.state == ST_L3_LC_ESTAB) {
566 st->l3.l3l2(st, pr, arg);
568 struct sk_buff *skb = arg;
570 skb_queue_tail(&st->l3.squeue, skb);
571 FsmEvent(&st->l3.l3m, EV_ESTABLISH_REQ, NULL);
574 case (DL_ESTABLISH | REQUEST):
575 FsmEvent(&st->l3.l3m, EV_ESTABLISH_REQ, NULL);
577 case (DL_ESTABLISH | CONFIRM):
578 FsmEvent(&st->l3.l3m, EV_ESTABLISH_CNF, NULL);
580 case (DL_ESTABLISH | INDICATION):
581 FsmEvent(&st->l3.l3m, EV_ESTABLISH_IND, NULL);
583 case (DL_RELEASE | INDICATION):
584 FsmEvent(&st->l3.l3m, EV_RELEASE_IND, NULL);
586 case (DL_RELEASE | CONFIRM):
587 FsmEvent(&st->l3.l3m, EV_RELEASE_CNF, NULL);
589 case (DL_RELEASE | REQUEST):
590 FsmEvent(&st->l3.l3m, EV_RELEASE_REQ, NULL);
598 l3fsm.state_count = L3_STATE_COUNT;
599 l3fsm.event_count = L3_EVENT_COUNT;
600 l3fsm.strEvent = strL3Event;
601 l3fsm.strState = strL3State;
602 return FsmNew(&l3fsm, L3FnList, L3_FN_COUNT);