1 /* $Id: isdnl2.c,v 2.30.2.4 2004/02/11 13:21:34 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 *l2_revision = "$Revision: 2.30.2.4 $";
24 static void l2m_debug(struct FsmInst *fi, char *fmt, ...);
26 static struct Fsm l2fsm;
39 #define L2_STATE_COUNT (ST_L2_8+1)
41 static char *strL2State[] =
65 EV_L2_DL_ESTABLISH_REQ,
78 #define L2_EVENT_COUNT (EV_L2_FRAME_ERROR+1)
80 static char *strL2Event[] =
93 "EV_L2_DL_ESTABLISH_REQ",
94 "EV_L2_DL_RELEASE_REQ",
101 "EV_L2_SET_OWN_BUSY",
102 "EV_L2_CLEAR_OWN_BUSY",
106 static int l2addrsize(struct Layer2 *l2);
109 set_peer_busy(struct Layer2 *l2) {
110 test_and_set_bit(FLG_PEER_BUSY, &l2->flag);
111 if (skb_queue_len(&l2->i_queue) || skb_queue_len(&l2->ui_queue))
112 test_and_set_bit(FLG_L2BLOCK, &l2->flag);
116 clear_peer_busy(struct Layer2 *l2) {
117 if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag))
118 test_and_clear_bit(FLG_L2BLOCK, &l2->flag);
122 InitWin(struct Layer2 *l2)
126 for (i = 0; i < MAX_WINDOW; i++)
127 l2->windowar[i] = NULL;
131 freewin1(struct Layer2 *l2)
135 for (i = 0; i < MAX_WINDOW; i++) {
136 if (l2->windowar[i]) {
138 dev_kfree_skb(l2->windowar[i]);
139 l2->windowar[i] = NULL;
146 freewin(struct PStack *st)
152 ReleaseWin(struct Layer2 *l2)
156 if((cnt = freewin1(l2)))
157 printk(KERN_WARNING "isdl2 freed %d skbuffs in release\n", cnt);
160 static inline unsigned int
161 cansend(struct PStack *st)
165 if(test_bit(FLG_MOD128, &st->l2.flag))
166 p1 = (st->l2.vs - st->l2.va) % 128;
168 p1 = (st->l2.vs - st->l2.va) % 8;
169 return ((p1 < st->l2.window) && !test_bit(FLG_PEER_BUSY, &st->l2.flag));
173 clear_exception(struct Layer2 *l2)
175 test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
176 test_and_clear_bit(FLG_REJEXC, &l2->flag);
177 test_and_clear_bit(FLG_OWN_BUSY, &l2->flag);
182 l2headersize(struct Layer2 *l2, int ui)
184 return (((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) +
185 (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1));
189 l2addrsize(struct Layer2 *l2)
191 return (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1);
195 sethdraddr(struct Layer2 *l2, u_char * header, int rsp)
197 u_char *ptr = header;
200 if (test_bit(FLG_LAPD, &l2->flag)) {
201 *ptr++ = (l2->sap << 2) | (rsp ? 2 : 0);
202 *ptr++ = (l2->tei << 1) | 1;
205 if (test_bit(FLG_ORIG, &l2->flag))
216 enqueue_super(struct PStack *st,
219 if (test_bit(FLG_LAPB, &st->l2.flag))
220 st->l1.bcs->tx_cnt += skb->len;
221 st->l2.l2l1(st, PH_DATA | REQUEST, skb);
224 #define enqueue_ui(a, b) enqueue_super(a, b)
229 return ((data[0] & 0xef) == UI);
235 return ((data[0] & 0xef) == UA);
241 return ((data[0] & 0xef) == DM);
245 IsDISC(u_char * data)
247 return ((data[0] & 0xef) == DISC);
251 IsSFrame(u_char * data, struct PStack *st)
253 register u_char d = *data;
255 if (!test_bit(FLG_MOD128, &st->l2.flag))
257 return(((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c));
261 IsSABME(u_char * data, struct PStack *st)
263 u_char d = data[0] & ~0x10;
265 return (test_bit(FLG_MOD128, &st->l2.flag) ? d == SABME : d == SABM);
269 IsREJ(u_char * data, struct PStack *st)
271 return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == REJ : (data[0] & 0xf) == REJ);
275 IsFRMR(u_char * data)
277 return ((data[0] & 0xef) == FRMR);
281 IsRNR(u_char * data, struct PStack *st)
283 return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == RNR : (data[0] & 0xf) == RNR);
287 iframe_error(struct PStack *st, struct sk_buff *skb)
289 int i = l2addrsize(&st->l2) + (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1);
290 int rsp = *skb->data & 0x2;
292 if (test_bit(FLG_ORIG, &st->l2.flag))
302 if ((skb->len - i) > st->l2.maxlen)
310 super_error(struct PStack *st, struct sk_buff *skb)
312 if (skb->len != l2addrsize(&st->l2) +
313 (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1))
320 unnum_error(struct PStack *st, struct sk_buff *skb, int wantrsp)
322 int rsp = (*skb->data & 0x2) >> 1;
323 if (test_bit(FLG_ORIG, &st->l2.flag))
329 if (skb->len != l2addrsize(&st->l2) + 1)
336 UI_error(struct PStack *st, struct sk_buff *skb)
338 int rsp = *skb->data & 0x2;
339 if (test_bit(FLG_ORIG, &st->l2.flag))
345 if (skb->len > st->l2.maxlen + l2addrsize(&st->l2) + 1)
352 FRMR_error(struct PStack *st, struct sk_buff *skb)
354 int headers = l2addrsize(&st->l2) + 1;
355 u_char *datap = skb->data + headers;
356 int rsp = *skb->data & 0x2;
358 if (test_bit(FLG_ORIG, &st->l2.flag))
364 if (test_bit(FLG_MOD128, &st->l2.flag)) {
365 if (skb->len < headers + 5)
368 l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x %2x %2x",
369 datap[0], datap[1], datap[2],
372 if (skb->len < headers + 3)
375 l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x",
376 datap[0], datap[1], datap[2]);
383 legalnr(struct PStack *st, unsigned int nr)
385 struct Layer2 *l2 = &st->l2;
387 if(test_bit(FLG_MOD128, &l2->flag))
388 return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128);
390 return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8);
394 setva(struct PStack *st, unsigned int nr)
396 struct Layer2 *l2 = &st->l2;
400 spin_lock_irqsave(&l2->lock, flags);
401 while (l2->va != nr) {
403 if(test_bit(FLG_MOD128, &l2->flag))
407 len = l2->windowar[l2->sow]->len;
408 if (PACKET_NOACK == l2->windowar[l2->sow]->pkt_type)
410 dev_kfree_skb(l2->windowar[l2->sow]);
411 l2->windowar[l2->sow] = NULL;
412 l2->sow = (l2->sow + 1) % l2->window;
413 spin_unlock_irqrestore(&l2->lock, flags);
414 if (test_bit(FLG_LLI_L2WAKEUP, &st->lli.flag) && (len >=0))
415 lli_writewakeup(st, len);
416 spin_lock_irqsave(&l2->lock, flags);
418 spin_unlock_irqrestore(&l2->lock, flags);
422 send_uframe(struct PStack *st, u_char cmd, u_char cr)
425 u_char tmp[MAX_HEADER_LEN];
428 i = sethdraddr(&st->l2, tmp, cr);
430 if (!(skb = alloc_skb(i, GFP_ATOMIC))) {
431 printk(KERN_WARNING "isdl2 can't alloc sbbuff for send_uframe\n");
434 memcpy(skb_put(skb, i), tmp, i);
435 enqueue_super(st, skb);
439 get_PollFlag(struct PStack * st, struct sk_buff * skb)
441 return (skb->data[l2addrsize(&(st->l2))] & 0x10);
445 get_PollFlagFree(struct PStack *st, struct sk_buff *skb)
449 PF = get_PollFlag(st, skb);
455 start_t200(struct PStack *st, int i)
457 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i);
458 test_and_set_bit(FLG_T200_RUN, &st->l2.flag);
462 restart_t200(struct PStack *st, int i)
464 FsmRestartTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i);
465 test_and_set_bit(FLG_T200_RUN, &st->l2.flag);
469 stop_t200(struct PStack *st, int i)
471 if(test_and_clear_bit(FLG_T200_RUN, &st->l2.flag))
472 FsmDelTimer(&st->l2.t200, i);
476 st5_dl_release_l2l3(struct PStack *st)
480 if(test_and_clear_bit(FLG_PEND_REL, &st->l2.flag))
481 pr = DL_RELEASE | CONFIRM;
483 pr = DL_RELEASE | INDICATION;
485 st->l2.l2l3(st, pr, NULL);
489 lapb_dl_release_l2l3(struct PStack *st, int f)
491 if (test_bit(FLG_LAPB, &st->l2.flag))
492 st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
493 st->l2.l2l3(st, DL_RELEASE | f, NULL);
497 establishlink(struct FsmInst *fi)
499 struct PStack *st = fi->userdata;
502 clear_exception(&st->l2);
504 cmd = (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM) | 0x10;
505 send_uframe(st, cmd, CMD);
506 FsmDelTimer(&st->l2.t203, 1);
508 test_and_clear_bit(FLG_PEND_REL, &st->l2.flag);
510 FsmChangeState(fi, ST_L2_5);
514 l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg)
516 struct sk_buff *skb = arg;
517 struct PStack *st = fi->userdata;
519 if (get_PollFlagFree(st, skb))
520 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'C');
522 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'D');
526 l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg)
528 struct sk_buff *skb = arg;
529 struct PStack *st = fi->userdata;
531 if (get_PollFlagFree(st, skb))
532 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B');
534 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E');
536 test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
541 l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg)
543 struct sk_buff *skb = arg;
544 struct PStack *st = fi->userdata;
546 if (get_PollFlagFree(st, skb))
547 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B');
549 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E');
552 test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
556 l2_go_st3(struct FsmInst *fi, int event, void *arg)
558 FsmChangeState(fi, ST_L2_3);
562 l2_mdl_assign(struct FsmInst *fi, int event, void *arg)
564 struct PStack *st = fi->userdata;
566 FsmChangeState(fi, ST_L2_3);
567 st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL);
571 l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg)
573 struct PStack *st = fi->userdata;
574 struct sk_buff *skb = arg;
576 skb_queue_tail(&st->l2.ui_queue, skb);
577 FsmChangeState(fi, ST_L2_2);
578 st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL);
582 l2_queue_ui(struct FsmInst *fi, int event, void *arg)
584 struct PStack *st = fi->userdata;
585 struct sk_buff *skb = arg;
587 skb_queue_tail(&st->l2.ui_queue, skb);
591 tx_ui(struct PStack *st)
594 u_char header[MAX_HEADER_LEN];
597 i = sethdraddr(&(st->l2), header, CMD);
599 while ((skb = skb_dequeue(&st->l2.ui_queue))) {
600 memcpy(skb_push(skb, i), header, i);
606 l2_send_ui(struct FsmInst *fi, int event, void *arg)
608 struct PStack *st = fi->userdata;
609 struct sk_buff *skb = arg;
611 skb_queue_tail(&st->l2.ui_queue, skb);
616 l2_got_ui(struct FsmInst *fi, int event, void *arg)
618 struct PStack *st = fi->userdata;
619 struct sk_buff *skb = arg;
621 skb_pull(skb, l2headersize(&st->l2, 1));
622 st->l2.l2l3(st, DL_UNIT_DATA | INDICATION, skb);
623 /* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
624 * in states 1-3 for broadcast
631 l2_establish(struct FsmInst *fi, int event, void *arg)
633 struct PStack *st = fi->userdata;
636 test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
640 l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg)
642 struct PStack *st = fi->userdata;
644 skb_queue_purge(&st->l2.i_queue);
645 test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
646 test_and_clear_bit(FLG_PEND_REL, &st->l2.flag);
650 l2_l3_reestablish(struct FsmInst *fi, int event, void *arg)
652 struct PStack *st = fi->userdata;
654 skb_queue_purge(&st->l2.i_queue);
656 test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
660 l2_release(struct FsmInst *fi, int event, void *arg)
662 struct PStack *st = fi->userdata;
664 st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
668 l2_pend_rel(struct FsmInst *fi, int event, void *arg)
670 struct PStack *st = fi->userdata;
672 test_and_set_bit(FLG_PEND_REL, &st->l2.flag);
676 l2_disconnect(struct FsmInst *fi, int event, void *arg)
678 struct PStack *st = fi->userdata;
680 skb_queue_purge(&st->l2.i_queue);
682 FsmChangeState(fi, ST_L2_6);
684 send_uframe(st, DISC | 0x10, CMD);
685 FsmDelTimer(&st->l2.t203, 1);
690 l2_start_multi(struct FsmInst *fi, int event, void *arg)
692 struct PStack *st = fi->userdata;
693 struct sk_buff *skb = arg;
695 send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
697 clear_exception(&st->l2);
702 FsmChangeState(fi, ST_L2_7);
703 FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3);
705 st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL);
709 l2_send_UA(struct FsmInst *fi, int event, void *arg)
711 struct PStack *st = fi->userdata;
712 struct sk_buff *skb = arg;
714 send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
718 l2_send_DM(struct FsmInst *fi, int event, void *arg)
720 struct PStack *st = fi->userdata;
721 struct sk_buff *skb = arg;
723 send_uframe(st, DM | get_PollFlagFree(st, skb), RSP);
727 l2_restart_multi(struct FsmInst *fi, int event, void *arg)
729 struct PStack *st = fi->userdata;
730 struct sk_buff *skb = arg;
735 send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
737 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'F');
739 if (st->l2.vs != st->l2.va) {
740 skb_queue_purge(&st->l2.i_queue);
744 clear_exception(&st->l2);
749 FsmChangeState(fi, ST_L2_7);
751 FsmRestartTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3);
754 st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL);
756 if ((ST_L2_7==state) || (ST_L2_8 == state))
757 if (skb_queue_len(&st->l2.i_queue) && cansend(st))
758 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
762 l2_stop_multi(struct FsmInst *fi, int event, void *arg)
764 struct PStack *st = fi->userdata;
765 struct sk_buff *skb = arg;
767 FsmChangeState(fi, ST_L2_4);
768 FsmDelTimer(&st->l2.t203, 3);
771 send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
773 skb_queue_purge(&st->l2.i_queue);
775 lapb_dl_release_l2l3(st, INDICATION);
779 l2_connected(struct FsmInst *fi, int event, void *arg)
781 struct PStack *st = fi->userdata;
782 struct sk_buff *skb = arg;
785 if (!get_PollFlag(st, skb)) {
786 l2_mdl_error_ua(fi, event, arg);
791 if (test_and_clear_bit(FLG_PEND_REL, &st->l2.flag))
792 l2_disconnect(fi, event, arg);
794 if (test_and_clear_bit(FLG_L3_INIT, &st->l2.flag)) {
795 pr = DL_ESTABLISH | CONFIRM;
796 } else if (st->l2.vs != st->l2.va) {
797 skb_queue_purge(&st->l2.i_queue);
798 pr = DL_ESTABLISH | INDICATION;
807 FsmChangeState(fi, ST_L2_7);
808 FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 4);
811 st->l2.l2l3(st, pr, NULL);
813 if (skb_queue_len(&st->l2.i_queue) && cansend(st))
814 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
818 l2_released(struct FsmInst *fi, int event, void *arg)
820 struct PStack *st = fi->userdata;
821 struct sk_buff *skb = arg;
823 if (!get_PollFlag(st, skb)) {
824 l2_mdl_error_ua(fi, event, arg);
830 lapb_dl_release_l2l3(st, CONFIRM);
831 FsmChangeState(fi, ST_L2_4);
835 l2_reestablish(struct FsmInst *fi, int event, void *arg)
837 struct PStack *st = fi->userdata;
838 struct sk_buff *skb = arg;
840 if (!get_PollFlagFree(st, skb)) {
842 test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
847 l2_st5_dm_release(struct FsmInst *fi, int event, void *arg)
849 struct PStack *st = fi->userdata;
850 struct sk_buff *skb = arg;
852 if (get_PollFlagFree(st, skb)) {
854 if (!test_bit(FLG_L3_INIT, &st->l2.flag))
855 skb_queue_purge(&st->l2.i_queue);
856 if (test_bit(FLG_LAPB, &st->l2.flag))
857 st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
858 st5_dl_release_l2l3(st);
859 FsmChangeState(fi, ST_L2_4);
864 l2_st6_dm_release(struct FsmInst *fi, int event, void *arg)
866 struct PStack *st = fi->userdata;
867 struct sk_buff *skb = arg;
869 if (get_PollFlagFree(st, skb)) {
871 lapb_dl_release_l2l3(st, CONFIRM);
872 FsmChangeState(fi, ST_L2_4);
877 enquiry_cr(struct PStack *st, u_char typ, u_char cr, u_char pf)
881 u_char tmp[MAX_HEADER_LEN];
885 i = sethdraddr(l2, tmp, cr);
886 if (test_bit(FLG_MOD128, &l2->flag)) {
888 tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0);
890 tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0);
891 if (!(skb = alloc_skb(i, GFP_ATOMIC))) {
892 printk(KERN_WARNING "isdl2 can't alloc sbbuff for enquiry_cr\n");
895 memcpy(skb_put(skb, i), tmp, i);
896 enqueue_super(st, skb);
900 enquiry_response(struct PStack *st)
902 if (test_bit(FLG_OWN_BUSY, &st->l2.flag))
903 enquiry_cr(st, RNR, RSP, 1);
905 enquiry_cr(st, RR, RSP, 1);
906 test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
910 transmit_enquiry(struct PStack *st)
912 if (test_bit(FLG_OWN_BUSY, &st->l2.flag))
913 enquiry_cr(st, RNR, CMD, 1);
915 enquiry_cr(st, RR, CMD, 1);
916 test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
922 nrerrorrecovery(struct FsmInst *fi)
924 struct PStack *st = fi->userdata;
926 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'J');
928 test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
932 invoke_retransmission(struct PStack *st, unsigned int nr)
934 struct Layer2 *l2 = &st->l2;
938 spin_lock_irqsave(&l2->lock, flags);
940 while (l2->vs != nr) {
942 if(test_bit(FLG_MOD128, &l2->flag)) {
944 p1 = (l2->vs - l2->va) % 128;
947 p1 = (l2->vs - l2->va) % 8;
949 p1 = (p1 + l2->sow) % l2->window;
950 if (test_bit(FLG_LAPB, &l2->flag))
951 st->l1.bcs->tx_cnt += l2->windowar[p1]->len + l2headersize(l2, 0);
952 skb_queue_head(&l2->i_queue, l2->windowar[p1]);
953 l2->windowar[p1] = NULL;
955 spin_unlock_irqrestore(&l2->lock, flags);
956 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
959 spin_unlock_irqrestore(&l2->lock, flags);
963 l2_st7_got_super(struct FsmInst *fi, int event, void *arg)
965 struct PStack *st = fi->userdata;
966 struct sk_buff *skb = arg;
967 int PollFlag, rsp, typ = RR;
969 struct Layer2 *l2 = &st->l2;
971 rsp = *skb->data & 0x2;
972 if (test_bit(FLG_ORIG, &l2->flag))
975 skb_pull(skb, l2addrsize(l2));
976 if (IsRNR(skb->data, st)) {
981 if (IsREJ(skb->data, st))
984 if (test_bit(FLG_MOD128, &l2->flag)) {
985 PollFlag = (skb->data[1] & 0x1) == 0x1;
986 nr = skb->data[1] >> 1;
988 PollFlag = (skb->data[0] & 0x10);
989 nr = (skb->data[0] >> 5) & 0x7;
995 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'A');
997 enquiry_response(st);
999 if (legalnr(st, nr)) {
1002 invoke_retransmission(st, nr);
1004 if (FsmAddTimer(&st->l2.t203, st->l2.T203,
1005 EV_L2_T203, NULL, 6))
1006 l2m_debug(&st->l2.l2m, "Restart T203 ST7 REJ");
1007 } else if ((nr == l2->vs) && (typ == RR)) {
1010 FsmRestartTimer(&st->l2.t203, st->l2.T203,
1011 EV_L2_T203, NULL, 7);
1012 } else if ((l2->va != nr) || (typ == RNR)) {
1014 if(typ != RR) FsmDelTimer(&st->l2.t203, 9);
1015 restart_t200(st, 12);
1017 if (skb_queue_len(&st->l2.i_queue) && (typ == RR))
1018 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1020 nrerrorrecovery(fi);
1024 l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg)
1026 struct PStack *st = fi->userdata;
1027 struct sk_buff *skb = arg;
1029 if (test_bit(FLG_LAPB, &st->l2.flag))
1030 st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
1031 if (!test_bit(FLG_L3_INIT, &st->l2.flag))
1032 skb_queue_tail(&st->l2.i_queue, skb);
1038 l2_feed_i_pull(struct FsmInst *fi, int event, void *arg)
1040 struct PStack *st = fi->userdata;
1041 struct sk_buff *skb = arg;
1043 if (test_bit(FLG_LAPB, &st->l2.flag))
1044 st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
1045 skb_queue_tail(&st->l2.i_queue, skb);
1046 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1050 l2_feed_iqueue(struct FsmInst *fi, int event, void *arg)
1052 struct PStack *st = fi->userdata;
1053 struct sk_buff *skb = arg;
1055 if (test_bit(FLG_LAPB, &st->l2.flag))
1056 st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
1057 skb_queue_tail(&st->l2.i_queue, skb);
1061 l2_got_iframe(struct FsmInst *fi, int event, void *arg)
1063 struct PStack *st = fi->userdata;
1064 struct sk_buff *skb = arg;
1065 struct Layer2 *l2 = &(st->l2);
1066 int PollFlag, ns, i;
1070 if (test_bit(FLG_MOD128, &l2->flag)) {
1071 PollFlag = ((skb->data[i + 1] & 0x1) == 0x1);
1072 ns = skb->data[i] >> 1;
1073 nr = (skb->data[i + 1] >> 1) & 0x7f;
1075 PollFlag = (skb->data[i] & 0x10);
1076 ns = (skb->data[i] >> 1) & 0x7;
1077 nr = (skb->data[i] >> 5) & 0x7;
1079 if (test_bit(FLG_OWN_BUSY, &l2->flag)) {
1081 if(PollFlag) enquiry_response(st);
1082 } else if (l2->vr == ns) {
1084 if(test_bit(FLG_MOD128, &l2->flag))
1088 test_and_clear_bit(FLG_REJEXC, &l2->flag);
1091 enquiry_response(st);
1093 test_and_set_bit(FLG_ACK_PEND, &l2->flag);
1094 skb_pull(skb, l2headersize(l2, 0));
1095 st->l2.l2l3(st, DL_DATA | INDICATION, skb);
1099 if (test_and_set_bit(FLG_REJEXC, &l2->flag)) {
1101 enquiry_response(st);
1103 enquiry_cr(st, REJ, RSP, PollFlag);
1104 test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
1108 if (legalnr(st, nr)) {
1109 if (!test_bit(FLG_PEER_BUSY, &st->l2.flag) && (fi->state == ST_L2_7)) {
1110 if (nr == st->l2.vs) {
1112 FsmRestartTimer(&st->l2.t203, st->l2.T203,
1113 EV_L2_T203, NULL, 7);
1114 } else if (nr != st->l2.va)
1115 restart_t200(st, 14);
1119 nrerrorrecovery(fi);
1123 if (skb_queue_len(&st->l2.i_queue) && (fi->state == ST_L2_7))
1124 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1125 if (test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag))
1126 enquiry_cr(st, RR, RSP, 0);
1130 l2_got_tei(struct FsmInst *fi, int event, void *arg)
1132 struct PStack *st = fi->userdata;
1134 st->l2.tei = (long) arg;
1136 if (fi->state == ST_L2_3) {
1138 test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
1140 FsmChangeState(fi, ST_L2_4);
1141 if (skb_queue_len(&st->l2.ui_queue))
1146 l2_st5_tout_200(struct FsmInst *fi, int event, void *arg)
1148 struct PStack *st = fi->userdata;
1150 if (test_bit(FLG_LAPD, &st->l2.flag) &&
1151 test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1152 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1153 } else if (st->l2.rc == st->l2.N200) {
1154 FsmChangeState(fi, ST_L2_4);
1155 test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
1156 skb_queue_purge(&st->l2.i_queue);
1157 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'G');
1158 if (test_bit(FLG_LAPB, &st->l2.flag))
1159 st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
1160 st5_dl_release_l2l3(st);
1163 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1164 send_uframe(st, (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM)
1170 l2_st6_tout_200(struct FsmInst *fi, int event, void *arg)
1172 struct PStack *st = fi->userdata;
1174 if (test_bit(FLG_LAPD, &st->l2.flag) &&
1175 test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1176 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1177 } else if (st->l2.rc == st->l2.N200) {
1178 FsmChangeState(fi, ST_L2_4);
1179 test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
1180 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'H');
1181 lapb_dl_release_l2l3(st, CONFIRM);
1184 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200,
1186 send_uframe(st, DISC | 0x10, CMD);
1191 l2_st7_tout_200(struct FsmInst *fi, int event, void *arg)
1193 struct PStack *st = fi->userdata;
1195 if (test_bit(FLG_LAPD, &st->l2.flag) &&
1196 test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1197 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1200 test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
1202 FsmChangeState(fi, ST_L2_8);
1204 transmit_enquiry(st);
1209 l2_st8_tout_200(struct FsmInst *fi, int event, void *arg)
1211 struct PStack *st = fi->userdata;
1213 if (test_bit(FLG_LAPD, &st->l2.flag) &&
1214 test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1215 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1218 test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
1219 if (st->l2.rc == st->l2.N200) {
1220 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'I');
1222 test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
1224 transmit_enquiry(st);
1230 l2_st7_tout_203(struct FsmInst *fi, int event, void *arg)
1232 struct PStack *st = fi->userdata;
1234 if (test_bit(FLG_LAPD, &st->l2.flag) &&
1235 test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1236 FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 9);
1239 FsmChangeState(fi, ST_L2_8);
1240 transmit_enquiry(st);
1245 l2_pull_iqueue(struct FsmInst *fi, int event, void *arg)
1247 struct PStack *st = fi->userdata;
1248 struct sk_buff *skb, *oskb;
1249 struct Layer2 *l2 = &st->l2;
1250 u_char header[MAX_HEADER_LEN];
1258 skb = skb_dequeue(&l2->i_queue);
1262 spin_lock_irqsave(&l2->lock, flags);
1263 if(test_bit(FLG_MOD128, &l2->flag))
1264 p1 = (l2->vs - l2->va) % 128;
1266 p1 = (l2->vs - l2->va) % 8;
1267 p1 = (p1 + l2->sow) % l2->window;
1268 if (l2->windowar[p1]) {
1269 printk(KERN_WARNING "isdnl2 try overwrite ack queue entry %d\n",
1271 dev_kfree_skb(l2->windowar[p1]);
1273 l2->windowar[p1] = skb_clone(skb, GFP_ATOMIC);
1275 i = sethdraddr(&st->l2, header, CMD);
1277 if (test_bit(FLG_MOD128, &l2->flag)) {
1278 header[i++] = l2->vs << 1;
1279 header[i++] = l2->vr << 1;
1280 l2->vs = (l2->vs + 1) % 128;
1282 header[i++] = (l2->vr << 5) | (l2->vs << 1);
1283 l2->vs = (l2->vs + 1) % 8;
1285 spin_unlock_irqrestore(&l2->lock, flags);
1286 p1 = skb->data - skb->head;
1288 memcpy(skb_push(skb, i), header, i);
1291 "isdl2 pull_iqueue skb header(%d/%d) too short\n", i, p1);
1293 skb = alloc_skb(oskb->len + i, GFP_ATOMIC);
1294 memcpy(skb_put(skb, i), header, i);
1295 memcpy(skb_put(skb, oskb->len), oskb->data, oskb->len);
1296 dev_kfree_skb(oskb);
1298 st->l2.l2l1(st, PH_PULL | INDICATION, skb);
1299 test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
1300 if (!test_and_set_bit(FLG_T200_RUN, &st->l2.flag)) {
1301 FsmDelTimer(&st->l2.t203, 13);
1302 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 11);
1304 if (skb_queue_len(&l2->i_queue) && cansend(st))
1305 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1309 l2_st8_got_super(struct FsmInst *fi, int event, void *arg)
1311 struct PStack *st = fi->userdata;
1312 struct sk_buff *skb = arg;
1313 int PollFlag, rsp, rnr = 0;
1315 struct Layer2 *l2 = &st->l2;
1317 rsp = *skb->data & 0x2;
1318 if (test_bit(FLG_ORIG, &l2->flag))
1321 skb_pull(skb, l2addrsize(l2));
1323 if (IsRNR(skb->data, st)) {
1327 clear_peer_busy(l2);
1329 if (test_bit(FLG_MOD128, &l2->flag)) {
1330 PollFlag = (skb->data[1] & 0x1) == 0x1;
1331 nr = skb->data[1] >> 1;
1333 PollFlag = (skb->data[0] & 0x10);
1334 nr = (skb->data[0] >> 5) & 0x7;
1338 if (rsp && PollFlag) {
1339 if (legalnr(st, nr)) {
1341 restart_t200(st, 15);
1344 FsmAddTimer(&l2->t203, l2->T203,
1345 EV_L2_T203, NULL, 5);
1348 invoke_retransmission(st, nr);
1349 FsmChangeState(fi, ST_L2_7);
1350 if (skb_queue_len(&l2->i_queue) && cansend(st))
1351 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1353 nrerrorrecovery(fi);
1355 if (!rsp && PollFlag)
1356 enquiry_response(st);
1357 if (legalnr(st, nr)) {
1360 nrerrorrecovery(fi);
1365 l2_got_FRMR(struct FsmInst *fi, int event, void *arg)
1367 struct PStack *st = fi->userdata;
1368 struct sk_buff *skb = arg;
1370 skb_pull(skb, l2addrsize(&st->l2) + 1);
1372 if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */
1373 (IsUA(skb->data) && (fi->state == ST_L2_7))) {
1374 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'K');
1376 test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
1382 l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg)
1384 struct PStack *st = fi->userdata;
1386 skb_queue_purge(&st->l2.ui_queue);
1388 FsmChangeState(fi, ST_L2_1);
1392 l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg)
1394 struct PStack *st = fi->userdata;
1396 skb_queue_purge(&st->l2.ui_queue);
1398 st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
1399 FsmChangeState(fi, ST_L2_1);
1403 l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg)
1405 struct PStack *st = fi->userdata;
1407 skb_queue_purge(&st->l2.i_queue);
1408 skb_queue_purge(&st->l2.ui_queue);
1412 st5_dl_release_l2l3(st);
1413 FsmChangeState(fi, ST_L2_1);
1417 l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg)
1419 struct PStack *st = fi->userdata;
1421 skb_queue_purge(&st->l2.ui_queue);
1424 st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
1425 FsmChangeState(fi, ST_L2_1);
1429 l2_tei_remove(struct FsmInst *fi, int event, void *arg)
1431 struct PStack *st = fi->userdata;
1433 skb_queue_purge(&st->l2.i_queue);
1434 skb_queue_purge(&st->l2.ui_queue);
1438 FsmDelTimer(&st->l2.t203, 19);
1439 st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
1440 FsmChangeState(fi, ST_L2_1);
1444 l2_st14_persistant_da(struct FsmInst *fi, int event, void *arg)
1446 struct PStack *st = fi->userdata;
1448 skb_queue_purge(&st->l2.i_queue);
1449 skb_queue_purge(&st->l2.ui_queue);
1450 if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag))
1451 st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
1455 l2_st5_persistant_da(struct FsmInst *fi, int event, void *arg)
1457 struct PStack *st = fi->userdata;
1459 skb_queue_purge(&st->l2.i_queue);
1460 skb_queue_purge(&st->l2.ui_queue);
1463 st5_dl_release_l2l3(st);
1464 FsmChangeState(fi, ST_L2_4);
1468 l2_st6_persistant_da(struct FsmInst *fi, int event, void *arg)
1470 struct PStack *st = fi->userdata;
1472 skb_queue_purge(&st->l2.ui_queue);
1474 st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
1475 FsmChangeState(fi, ST_L2_4);
1479 l2_persistant_da(struct FsmInst *fi, int event, void *arg)
1481 struct PStack *st = fi->userdata;
1483 skb_queue_purge(&st->l2.i_queue);
1484 skb_queue_purge(&st->l2.ui_queue);
1487 FsmDelTimer(&st->l2.t203, 19);
1488 st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
1489 FsmChangeState(fi, ST_L2_4);
1493 l2_set_own_busy(struct FsmInst *fi, int event, void *arg)
1495 struct PStack *st = fi->userdata;
1497 if(!test_and_set_bit(FLG_OWN_BUSY, &st->l2.flag)) {
1498 enquiry_cr(st, RNR, RSP, 0);
1499 test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
1504 l2_clear_own_busy(struct FsmInst *fi, int event, void *arg)
1506 struct PStack *st = fi->userdata;
1508 if(!test_and_clear_bit(FLG_OWN_BUSY, &st->l2.flag)) {
1509 enquiry_cr(st, RR, RSP, 0);
1510 test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
1515 l2_frame_error(struct FsmInst *fi, int event, void *arg)
1517 struct PStack *st = fi->userdata;
1519 st->ma.layer(st, MDL_ERROR | INDICATION, arg);
1523 l2_frame_error_reest(struct FsmInst *fi, int event, void *arg)
1525 struct PStack *st = fi->userdata;
1527 st->ma.layer(st, MDL_ERROR | INDICATION, arg);
1529 test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
1532 static struct FsmNode L2FnList[] __initdata =
1534 {ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign},
1535 {ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3},
1536 {ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish},
1537 {ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3},
1538 {ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish},
1539 {ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish},
1540 {ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release},
1541 {ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel},
1542 {ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect},
1543 {ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect},
1544 {ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest},
1545 {ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull},
1546 {ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue},
1547 {ST_L2_1, EV_L2_DL_UNIT_DATA, l2_queue_ui_assign},
1548 {ST_L2_2, EV_L2_DL_UNIT_DATA, l2_queue_ui},
1549 {ST_L2_3, EV_L2_DL_UNIT_DATA, l2_queue_ui},
1550 {ST_L2_4, EV_L2_DL_UNIT_DATA, l2_send_ui},
1551 {ST_L2_5, EV_L2_DL_UNIT_DATA, l2_send_ui},
1552 {ST_L2_6, EV_L2_DL_UNIT_DATA, l2_send_ui},
1553 {ST_L2_7, EV_L2_DL_UNIT_DATA, l2_send_ui},
1554 {ST_L2_8, EV_L2_DL_UNIT_DATA, l2_send_ui},
1555 {ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei},
1556 {ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei},
1557 {ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei},
1558 {ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove},
1559 {ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove},
1560 {ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove},
1561 {ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove},
1562 {ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove},
1563 {ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove},
1564 {ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove},
1565 {ST_L2_4, EV_L2_SABME, l2_start_multi},
1566 {ST_L2_5, EV_L2_SABME, l2_send_UA},
1567 {ST_L2_6, EV_L2_SABME, l2_send_DM},
1568 {ST_L2_7, EV_L2_SABME, l2_restart_multi},
1569 {ST_L2_8, EV_L2_SABME, l2_restart_multi},
1570 {ST_L2_4, EV_L2_DISC, l2_send_DM},
1571 {ST_L2_5, EV_L2_DISC, l2_send_DM},
1572 {ST_L2_6, EV_L2_DISC, l2_send_UA},
1573 {ST_L2_7, EV_L2_DISC, l2_stop_multi},
1574 {ST_L2_8, EV_L2_DISC, l2_stop_multi},
1575 {ST_L2_4, EV_L2_UA, l2_mdl_error_ua},
1576 {ST_L2_5, EV_L2_UA, l2_connected},
1577 {ST_L2_6, EV_L2_UA, l2_released},
1578 {ST_L2_7, EV_L2_UA, l2_mdl_error_ua},
1579 {ST_L2_8, EV_L2_UA, l2_mdl_error_ua},
1580 {ST_L2_4, EV_L2_DM, l2_reestablish},
1581 {ST_L2_5, EV_L2_DM, l2_st5_dm_release},
1582 {ST_L2_6, EV_L2_DM, l2_st6_dm_release},
1583 {ST_L2_7, EV_L2_DM, l2_mdl_error_dm},
1584 {ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm},
1585 {ST_L2_1, EV_L2_UI, l2_got_ui},
1586 {ST_L2_2, EV_L2_UI, l2_got_ui},
1587 {ST_L2_3, EV_L2_UI, l2_got_ui},
1588 {ST_L2_4, EV_L2_UI, l2_got_ui},
1589 {ST_L2_5, EV_L2_UI, l2_got_ui},
1590 {ST_L2_6, EV_L2_UI, l2_got_ui},
1591 {ST_L2_7, EV_L2_UI, l2_got_ui},
1592 {ST_L2_8, EV_L2_UI, l2_got_ui},
1593 {ST_L2_7, EV_L2_FRMR, l2_got_FRMR},
1594 {ST_L2_8, EV_L2_FRMR, l2_got_FRMR},
1595 {ST_L2_7, EV_L2_SUPER, l2_st7_got_super},
1596 {ST_L2_8, EV_L2_SUPER, l2_st8_got_super},
1597 {ST_L2_7, EV_L2_I, l2_got_iframe},
1598 {ST_L2_8, EV_L2_I, l2_got_iframe},
1599 {ST_L2_5, EV_L2_T200, l2_st5_tout_200},
1600 {ST_L2_6, EV_L2_T200, l2_st6_tout_200},
1601 {ST_L2_7, EV_L2_T200, l2_st7_tout_200},
1602 {ST_L2_8, EV_L2_T200, l2_st8_tout_200},
1603 {ST_L2_7, EV_L2_T203, l2_st7_tout_203},
1604 {ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue},
1605 {ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy},
1606 {ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy},
1607 {ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy},
1608 {ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy},
1609 {ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error},
1610 {ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error},
1611 {ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error},
1612 {ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest},
1613 {ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest},
1614 {ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistant_da},
1615 {ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove},
1616 {ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove},
1617 {ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistant_da},
1618 {ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistant_da},
1619 {ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistant_da},
1620 {ST_L2_7, EV_L1_DEACTIVATE, l2_persistant_da},
1621 {ST_L2_8, EV_L1_DEACTIVATE, l2_persistant_da},
1624 #define L2_FN_COUNT (sizeof(L2FnList)/sizeof(struct FsmNode))
1627 isdnl2_l1l2(struct PStack *st, int pr, void *arg)
1629 struct sk_buff *skb = arg;
1635 case (PH_DATA | INDICATION):
1637 len = l2addrsize(&st->l2);
1641 FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'N');
1645 if (!(*datap & 1)) { /* I-Frame */
1646 if(!(c = iframe_error(st, skb)))
1647 ret = FsmEvent(&st->l2.l2m, EV_L2_I, skb);
1648 } else if (IsSFrame(datap, st)) { /* S-Frame */
1649 if(!(c = super_error(st, skb)))
1650 ret = FsmEvent(&st->l2.l2m, EV_L2_SUPER, skb);
1651 } else if (IsUI(datap)) {
1652 if(!(c = UI_error(st, skb)))
1653 ret = FsmEvent(&st->l2.l2m, EV_L2_UI, skb);
1654 } else if (IsSABME(datap, st)) {
1655 if(!(c = unnum_error(st, skb, CMD)))
1656 ret = FsmEvent(&st->l2.l2m, EV_L2_SABME, skb);
1657 } else if (IsUA(datap)) {
1658 if(!(c = unnum_error(st, skb, RSP)))
1659 ret = FsmEvent(&st->l2.l2m, EV_L2_UA, skb);
1660 } else if (IsDISC(datap)) {
1661 if(!(c = unnum_error(st, skb, CMD)))
1662 ret = FsmEvent(&st->l2.l2m, EV_L2_DISC, skb);
1663 } else if (IsDM(datap)) {
1664 if(!(c = unnum_error(st, skb, RSP)))
1665 ret = FsmEvent(&st->l2.l2m, EV_L2_DM, skb);
1666 } else if (IsFRMR(datap)) {
1667 if(!(c = FRMR_error(st,skb)))
1668 ret = FsmEvent(&st->l2.l2m, EV_L2_FRMR, skb);
1670 FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'L');
1676 FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *)(long)c);
1682 case (PH_PULL | CONFIRM):
1683 FsmEvent(&st->l2.l2m, EV_L2_ACK_PULL, arg);
1685 case (PH_PAUSE | INDICATION):
1686 test_and_set_bit(FLG_DCHAN_BUSY, &st->l2.flag);
1688 case (PH_PAUSE | CONFIRM):
1689 test_and_clear_bit(FLG_DCHAN_BUSY, &st->l2.flag);
1691 case (PH_ACTIVATE | CONFIRM):
1692 case (PH_ACTIVATE | INDICATION):
1693 test_and_set_bit(FLG_L1_ACTIV, &st->l2.flag);
1694 if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag))
1695 FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg);
1697 case (PH_DEACTIVATE | INDICATION):
1698 case (PH_DEACTIVATE | CONFIRM):
1699 test_and_clear_bit(FLG_L1_ACTIV, &st->l2.flag);
1700 FsmEvent(&st->l2.l2m, EV_L1_DEACTIVATE, arg);
1703 l2m_debug(&st->l2.l2m, "l2 unknown pr %04x", pr);
1709 isdnl2_l3l2(struct PStack *st, int pr, void *arg)
1712 case (DL_DATA | REQUEST):
1713 if (FsmEvent(&st->l2.l2m, EV_L2_DL_DATA, arg)) {
1714 dev_kfree_skb((struct sk_buff *) arg);
1717 case (DL_UNIT_DATA | REQUEST):
1718 if (FsmEvent(&st->l2.l2m, EV_L2_DL_UNIT_DATA, arg)) {
1719 dev_kfree_skb((struct sk_buff *) arg);
1722 case (DL_ESTABLISH | REQUEST):
1723 if (test_bit(FLG_L1_ACTIV, &st->l2.flag)) {
1724 if (test_bit(FLG_LAPD, &st->l2.flag) ||
1725 test_bit(FLG_ORIG, &st->l2.flag)) {
1726 FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg);
1729 if (test_bit(FLG_LAPD, &st->l2.flag) ||
1730 test_bit(FLG_ORIG, &st->l2.flag)) {
1731 test_and_set_bit(FLG_ESTAB_PEND, &st->l2.flag);
1733 st->l2.l2l1(st, PH_ACTIVATE, NULL);
1736 case (DL_RELEASE | REQUEST):
1737 if (test_bit(FLG_LAPB, &st->l2.flag)) {
1738 st->l2.l2l1(st, PH_DEACTIVATE, NULL);
1740 FsmEvent(&st->l2.l2m, EV_L2_DL_RELEASE_REQ, arg);
1742 case (MDL_ASSIGN | REQUEST):
1743 FsmEvent(&st->l2.l2m, EV_L2_MDL_ASSIGN, arg);
1745 case (MDL_REMOVE | REQUEST):
1746 FsmEvent(&st->l2.l2m, EV_L2_MDL_REMOVE, arg);
1748 case (MDL_ERROR | RESPONSE):
1749 FsmEvent(&st->l2.l2m, EV_L2_MDL_ERROR, arg);
1755 releasestack_isdnl2(struct PStack *st)
1757 FsmDelTimer(&st->l2.t200, 21);
1758 FsmDelTimer(&st->l2.t203, 16);
1759 skb_queue_purge(&st->l2.i_queue);
1760 skb_queue_purge(&st->l2.ui_queue);
1761 ReleaseWin(&st->l2);
1765 l2m_debug(struct FsmInst *fi, char *fmt, ...)
1768 struct PStack *st = fi->userdata;
1770 va_start(args, fmt);
1771 VHiSax_putstatus(st->l1.hardware, st->l2.debug_id, fmt, args);
1776 setstack_isdnl2(struct PStack *st, char *debug_id)
1778 spin_lock_init(&st->l2.lock);
1779 st->l1.l1l2 = isdnl2_l1l2;
1780 st->l3.l3l2 = isdnl2_l3l2;
1782 skb_queue_head_init(&st->l2.i_queue);
1783 skb_queue_head_init(&st->l2.ui_queue);
1787 st->l2.l2m.fsm = &l2fsm;
1788 if (test_bit(FLG_LAPB, &st->l2.flag))
1789 st->l2.l2m.state = ST_L2_4;
1791 st->l2.l2m.state = ST_L2_1;
1792 st->l2.l2m.debug = 0;
1793 st->l2.l2m.userdata = st;
1794 st->l2.l2m.userint = 0;
1795 st->l2.l2m.printdebug = l2m_debug;
1796 strcpy(st->l2.debug_id, debug_id);
1798 FsmInitTimer(&st->l2.l2m, &st->l2.t200);
1799 FsmInitTimer(&st->l2.l2m, &st->l2.t203);
1803 transl2_l3l2(struct PStack *st, int pr, void *arg)
1806 case (DL_DATA | REQUEST):
1807 case (DL_UNIT_DATA | REQUEST):
1808 st->l2.l2l1(st, PH_DATA | REQUEST, arg);
1810 case (DL_ESTABLISH | REQUEST):
1811 st->l2.l2l1(st, PH_ACTIVATE | REQUEST, NULL);
1813 case (DL_RELEASE | REQUEST):
1814 st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
1820 setstack_transl2(struct PStack *st)
1822 st->l3.l3l2 = transl2_l3l2;
1826 releasestack_transl2(struct PStack *st)
1833 l2fsm.state_count = L2_STATE_COUNT;
1834 l2fsm.event_count = L2_EVENT_COUNT;
1835 l2fsm.strEvent = strL2Event;
1836 l2fsm.strState = strL2State;
1837 return FsmNew(&l2fsm, L2FnList, L2_FN_COUNT);