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>
19 #include <linux/gfp.h>
23 const char *l2_revision = "$Revision: 2.30.2.4 $";
25 static void l2m_debug(struct FsmInst *fi, char *fmt, ...);
27 static struct Fsm l2fsm;
40 #define L2_STATE_COUNT (ST_L2_8 + 1)
42 static char *strL2State[] =
66 EV_L2_DL_ESTABLISH_REQ,
79 #define L2_EVENT_COUNT (EV_L2_FRAME_ERROR + 1)
81 static char *strL2Event[] =
94 "EV_L2_DL_ESTABLISH_REQ",
95 "EV_L2_DL_RELEASE_REQ",
102 "EV_L2_SET_OWN_BUSY",
103 "EV_L2_CLEAR_OWN_BUSY",
107 static int l2addrsize(struct Layer2 *l2);
110 set_peer_busy(struct Layer2 *l2) {
111 test_and_set_bit(FLG_PEER_BUSY, &l2->flag);
112 if (!skb_queue_empty(&l2->i_queue) ||
113 !skb_queue_empty(&l2->ui_queue))
114 test_and_set_bit(FLG_L2BLOCK, &l2->flag);
118 clear_peer_busy(struct Layer2 *l2) {
119 if (test_and_clear_bit(FLG_PEER_BUSY, &l2->flag))
120 test_and_clear_bit(FLG_L2BLOCK, &l2->flag);
124 InitWin(struct Layer2 *l2)
128 for (i = 0; i < MAX_WINDOW; i++)
129 l2->windowar[i] = NULL;
133 freewin1(struct Layer2 *l2)
137 for (i = 0; i < MAX_WINDOW; i++) {
138 if (l2->windowar[i]) {
140 dev_kfree_skb(l2->windowar[i]);
141 l2->windowar[i] = NULL;
148 freewin(struct PStack *st)
154 ReleaseWin(struct Layer2 *l2)
158 if ((cnt = freewin1(l2)))
159 printk(KERN_WARNING "isdl2 freed %d skbuffs in release\n", cnt);
162 static inline unsigned int
163 cansend(struct PStack *st)
167 if (test_bit(FLG_MOD128, &st->l2.flag))
168 p1 = (st->l2.vs - st->l2.va) % 128;
170 p1 = (st->l2.vs - st->l2.va) % 8;
171 return ((p1 < st->l2.window) && !test_bit(FLG_PEER_BUSY, &st->l2.flag));
175 clear_exception(struct Layer2 *l2)
177 test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
178 test_and_clear_bit(FLG_REJEXC, &l2->flag);
179 test_and_clear_bit(FLG_OWN_BUSY, &l2->flag);
184 l2headersize(struct Layer2 *l2, int ui)
186 return (((test_bit(FLG_MOD128, &l2->flag) && (!ui)) ? 2 : 1) +
187 (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1));
191 l2addrsize(struct Layer2 *l2)
193 return (test_bit(FLG_LAPD, &l2->flag) ? 2 : 1);
197 sethdraddr(struct Layer2 *l2, u_char *header, int rsp)
199 u_char *ptr = header;
202 if (test_bit(FLG_LAPD, &l2->flag)) {
203 *ptr++ = (l2->sap << 2) | (rsp ? 2 : 0);
204 *ptr++ = (l2->tei << 1) | 1;
207 if (test_bit(FLG_ORIG, &l2->flag))
218 enqueue_super(struct PStack *st,
221 if (test_bit(FLG_LAPB, &st->l2.flag))
222 st->l1.bcs->tx_cnt += skb->len;
223 st->l2.l2l1(st, PH_DATA | REQUEST, skb);
226 #define enqueue_ui(a, b) enqueue_super(a, b)
231 return ((data[0] & 0xef) == UI);
237 return ((data[0] & 0xef) == UA);
243 return ((data[0] & 0xef) == DM);
249 return ((data[0] & 0xef) == DISC);
253 IsSFrame(u_char *data, struct PStack *st)
255 register u_char d = *data;
257 if (!test_bit(FLG_MOD128, &st->l2.flag))
259 return (((d & 0xf3) == 1) && ((d & 0x0c) != 0x0c));
263 IsSABME(u_char *data, struct PStack *st)
265 u_char d = data[0] & ~0x10;
267 return (test_bit(FLG_MOD128, &st->l2.flag) ? d == SABME : d == SABM);
271 IsREJ(u_char *data, struct PStack *st)
273 return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == REJ : (data[0] & 0xf) == REJ);
279 return ((data[0] & 0xef) == FRMR);
283 IsRNR(u_char *data, struct PStack *st)
285 return (test_bit(FLG_MOD128, &st->l2.flag) ? data[0] == RNR : (data[0] & 0xf) == RNR);
289 iframe_error(struct PStack *st, struct sk_buff *skb)
291 int i = l2addrsize(&st->l2) + (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1);
292 int rsp = *skb->data & 0x2;
294 if (test_bit(FLG_ORIG, &st->l2.flag))
304 if ((skb->len - i) > st->l2.maxlen)
312 super_error(struct PStack *st, struct sk_buff *skb)
314 if (skb->len != l2addrsize(&st->l2) +
315 (test_bit(FLG_MOD128, &st->l2.flag) ? 2 : 1))
322 unnum_error(struct PStack *st, struct sk_buff *skb, int wantrsp)
324 int rsp = (*skb->data & 0x2) >> 1;
325 if (test_bit(FLG_ORIG, &st->l2.flag))
331 if (skb->len != l2addrsize(&st->l2) + 1)
338 UI_error(struct PStack *st, struct sk_buff *skb)
340 int rsp = *skb->data & 0x2;
341 if (test_bit(FLG_ORIG, &st->l2.flag))
347 if (skb->len > st->l2.maxlen + l2addrsize(&st->l2) + 1)
354 FRMR_error(struct PStack *st, struct sk_buff *skb)
356 int headers = l2addrsize(&st->l2) + 1;
357 u_char *datap = skb->data + headers;
358 int rsp = *skb->data & 0x2;
360 if (test_bit(FLG_ORIG, &st->l2.flag))
366 if (test_bit(FLG_MOD128, &st->l2.flag)) {
367 if (skb->len < headers + 5)
370 l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x %2x %2x",
371 datap[0], datap[1], datap[2],
374 if (skb->len < headers + 3)
377 l2m_debug(&st->l2.l2m, "FRMR information %2x %2x %2x",
378 datap[0], datap[1], datap[2]);
385 legalnr(struct PStack *st, unsigned int nr)
387 struct Layer2 *l2 = &st->l2;
389 if (test_bit(FLG_MOD128, &l2->flag))
390 return ((nr - l2->va) % 128) <= ((l2->vs - l2->va) % 128);
392 return ((nr - l2->va) % 8) <= ((l2->vs - l2->va) % 8);
396 setva(struct PStack *st, unsigned int nr)
398 struct Layer2 *l2 = &st->l2;
402 spin_lock_irqsave(&l2->lock, flags);
403 while (l2->va != nr) {
405 if (test_bit(FLG_MOD128, &l2->flag))
409 len = l2->windowar[l2->sow]->len;
410 if (PACKET_NOACK == l2->windowar[l2->sow]->pkt_type)
412 dev_kfree_skb(l2->windowar[l2->sow]);
413 l2->windowar[l2->sow] = NULL;
414 l2->sow = (l2->sow + 1) % l2->window;
415 spin_unlock_irqrestore(&l2->lock, flags);
416 if (test_bit(FLG_LLI_L2WAKEUP, &st->lli.flag) && (len >= 0))
417 lli_writewakeup(st, len);
418 spin_lock_irqsave(&l2->lock, flags);
420 spin_unlock_irqrestore(&l2->lock, flags);
424 send_uframe(struct PStack *st, u_char cmd, u_char cr)
427 u_char tmp[MAX_HEADER_LEN];
430 i = sethdraddr(&st->l2, tmp, cr);
432 if (!(skb = alloc_skb(i, GFP_ATOMIC))) {
433 printk(KERN_WARNING "isdl2 can't alloc sbbuff for send_uframe\n");
436 memcpy(skb_put(skb, i), tmp, i);
437 enqueue_super(st, skb);
441 get_PollFlag(struct PStack *st, struct sk_buff *skb)
443 return (skb->data[l2addrsize(&(st->l2))] & 0x10);
447 get_PollFlagFree(struct PStack *st, struct sk_buff *skb)
451 PF = get_PollFlag(st, skb);
457 start_t200(struct PStack *st, int i)
459 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i);
460 test_and_set_bit(FLG_T200_RUN, &st->l2.flag);
464 restart_t200(struct PStack *st, int i)
466 FsmRestartTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, i);
467 test_and_set_bit(FLG_T200_RUN, &st->l2.flag);
471 stop_t200(struct PStack *st, int i)
473 if (test_and_clear_bit(FLG_T200_RUN, &st->l2.flag))
474 FsmDelTimer(&st->l2.t200, i);
478 st5_dl_release_l2l3(struct PStack *st)
482 if (test_and_clear_bit(FLG_PEND_REL, &st->l2.flag))
483 pr = DL_RELEASE | CONFIRM;
485 pr = DL_RELEASE | INDICATION;
487 st->l2.l2l3(st, pr, NULL);
491 lapb_dl_release_l2l3(struct PStack *st, int f)
493 if (test_bit(FLG_LAPB, &st->l2.flag))
494 st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
495 st->l2.l2l3(st, DL_RELEASE | f, NULL);
499 establishlink(struct FsmInst *fi)
501 struct PStack *st = fi->userdata;
504 clear_exception(&st->l2);
506 cmd = (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM) | 0x10;
507 send_uframe(st, cmd, CMD);
508 FsmDelTimer(&st->l2.t203, 1);
510 test_and_clear_bit(FLG_PEND_REL, &st->l2.flag);
512 FsmChangeState(fi, ST_L2_5);
516 l2_mdl_error_ua(struct FsmInst *fi, int event, void *arg)
518 struct sk_buff *skb = arg;
519 struct PStack *st = fi->userdata;
521 if (get_PollFlagFree(st, skb))
522 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'C');
524 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'D');
528 l2_mdl_error_dm(struct FsmInst *fi, int event, void *arg)
530 struct sk_buff *skb = arg;
531 struct PStack *st = fi->userdata;
533 if (get_PollFlagFree(st, skb))
534 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B');
536 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E');
538 test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
543 l2_st8_mdl_error_dm(struct FsmInst *fi, int event, void *arg)
545 struct sk_buff *skb = arg;
546 struct PStack *st = fi->userdata;
548 if (get_PollFlagFree(st, skb))
549 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'B');
551 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'E');
554 test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
558 l2_go_st3(struct FsmInst *fi, int event, void *arg)
560 FsmChangeState(fi, ST_L2_3);
564 l2_mdl_assign(struct FsmInst *fi, int event, void *arg)
566 struct PStack *st = fi->userdata;
568 FsmChangeState(fi, ST_L2_3);
569 st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL);
573 l2_queue_ui_assign(struct FsmInst *fi, int event, void *arg)
575 struct PStack *st = fi->userdata;
576 struct sk_buff *skb = arg;
578 skb_queue_tail(&st->l2.ui_queue, skb);
579 FsmChangeState(fi, ST_L2_2);
580 st->l2.l2tei(st, MDL_ASSIGN | INDICATION, NULL);
584 l2_queue_ui(struct FsmInst *fi, int event, void *arg)
586 struct PStack *st = fi->userdata;
587 struct sk_buff *skb = arg;
589 skb_queue_tail(&st->l2.ui_queue, skb);
593 tx_ui(struct PStack *st)
596 u_char header[MAX_HEADER_LEN];
599 i = sethdraddr(&(st->l2), header, CMD);
601 while ((skb = skb_dequeue(&st->l2.ui_queue))) {
602 memcpy(skb_push(skb, i), header, i);
608 l2_send_ui(struct FsmInst *fi, int event, void *arg)
610 struct PStack *st = fi->userdata;
611 struct sk_buff *skb = arg;
613 skb_queue_tail(&st->l2.ui_queue, skb);
618 l2_got_ui(struct FsmInst *fi, int event, void *arg)
620 struct PStack *st = fi->userdata;
621 struct sk_buff *skb = arg;
623 skb_pull(skb, l2headersize(&st->l2, 1));
624 st->l2.l2l3(st, DL_UNIT_DATA | INDICATION, skb);
625 /* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
626 * in states 1-3 for broadcast
633 l2_establish(struct FsmInst *fi, int event, void *arg)
635 struct PStack *st = fi->userdata;
638 test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
642 l2_discard_i_setl3(struct FsmInst *fi, int event, void *arg)
644 struct PStack *st = fi->userdata;
646 skb_queue_purge(&st->l2.i_queue);
647 test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
648 test_and_clear_bit(FLG_PEND_REL, &st->l2.flag);
652 l2_l3_reestablish(struct FsmInst *fi, int event, void *arg)
654 struct PStack *st = fi->userdata;
656 skb_queue_purge(&st->l2.i_queue);
658 test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
662 l2_release(struct FsmInst *fi, int event, void *arg)
664 struct PStack *st = fi->userdata;
666 st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
670 l2_pend_rel(struct FsmInst *fi, int event, void *arg)
672 struct PStack *st = fi->userdata;
674 test_and_set_bit(FLG_PEND_REL, &st->l2.flag);
678 l2_disconnect(struct FsmInst *fi, int event, void *arg)
680 struct PStack *st = fi->userdata;
682 skb_queue_purge(&st->l2.i_queue);
684 FsmChangeState(fi, ST_L2_6);
686 send_uframe(st, DISC | 0x10, CMD);
687 FsmDelTimer(&st->l2.t203, 1);
692 l2_start_multi(struct FsmInst *fi, int event, void *arg)
694 struct PStack *st = fi->userdata;
695 struct sk_buff *skb = arg;
697 send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
699 clear_exception(&st->l2);
704 FsmChangeState(fi, ST_L2_7);
705 FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3);
707 st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL);
711 l2_send_UA(struct FsmInst *fi, int event, void *arg)
713 struct PStack *st = fi->userdata;
714 struct sk_buff *skb = arg;
716 send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
720 l2_send_DM(struct FsmInst *fi, int event, void *arg)
722 struct PStack *st = fi->userdata;
723 struct sk_buff *skb = arg;
725 send_uframe(st, DM | get_PollFlagFree(st, skb), RSP);
729 l2_restart_multi(struct FsmInst *fi, int event, void *arg)
731 struct PStack *st = fi->userdata;
732 struct sk_buff *skb = arg;
737 send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
739 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'F');
741 if (st->l2.vs != st->l2.va) {
742 skb_queue_purge(&st->l2.i_queue);
746 clear_exception(&st->l2);
751 FsmChangeState(fi, ST_L2_7);
753 FsmRestartTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 3);
756 st->l2.l2l3(st, DL_ESTABLISH | INDICATION, NULL);
758 if ((ST_L2_7 == state) || (ST_L2_8 == state))
759 if (!skb_queue_empty(&st->l2.i_queue) && cansend(st))
760 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
764 l2_stop_multi(struct FsmInst *fi, int event, void *arg)
766 struct PStack *st = fi->userdata;
767 struct sk_buff *skb = arg;
769 FsmChangeState(fi, ST_L2_4);
770 FsmDelTimer(&st->l2.t203, 3);
773 send_uframe(st, UA | get_PollFlagFree(st, skb), RSP);
775 skb_queue_purge(&st->l2.i_queue);
777 lapb_dl_release_l2l3(st, INDICATION);
781 l2_connected(struct FsmInst *fi, int event, void *arg)
783 struct PStack *st = fi->userdata;
784 struct sk_buff *skb = arg;
787 if (!get_PollFlag(st, skb)) {
788 l2_mdl_error_ua(fi, event, arg);
793 if (test_and_clear_bit(FLG_PEND_REL, &st->l2.flag))
794 l2_disconnect(fi, event, arg);
796 if (test_and_clear_bit(FLG_L3_INIT, &st->l2.flag)) {
797 pr = DL_ESTABLISH | CONFIRM;
798 } else if (st->l2.vs != st->l2.va) {
799 skb_queue_purge(&st->l2.i_queue);
800 pr = DL_ESTABLISH | INDICATION;
809 FsmChangeState(fi, ST_L2_7);
810 FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 4);
813 st->l2.l2l3(st, pr, NULL);
815 if (!skb_queue_empty(&st->l2.i_queue) && cansend(st))
816 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
820 l2_released(struct FsmInst *fi, int event, void *arg)
822 struct PStack *st = fi->userdata;
823 struct sk_buff *skb = arg;
825 if (!get_PollFlag(st, skb)) {
826 l2_mdl_error_ua(fi, event, arg);
832 lapb_dl_release_l2l3(st, CONFIRM);
833 FsmChangeState(fi, ST_L2_4);
837 l2_reestablish(struct FsmInst *fi, int event, void *arg)
839 struct PStack *st = fi->userdata;
840 struct sk_buff *skb = arg;
842 if (!get_PollFlagFree(st, skb)) {
844 test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
849 l2_st5_dm_release(struct FsmInst *fi, int event, void *arg)
851 struct PStack *st = fi->userdata;
852 struct sk_buff *skb = arg;
854 if (get_PollFlagFree(st, skb)) {
856 if (!test_bit(FLG_L3_INIT, &st->l2.flag))
857 skb_queue_purge(&st->l2.i_queue);
858 if (test_bit(FLG_LAPB, &st->l2.flag))
859 st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
860 st5_dl_release_l2l3(st);
861 FsmChangeState(fi, ST_L2_4);
866 l2_st6_dm_release(struct FsmInst *fi, int event, void *arg)
868 struct PStack *st = fi->userdata;
869 struct sk_buff *skb = arg;
871 if (get_PollFlagFree(st, skb)) {
873 lapb_dl_release_l2l3(st, CONFIRM);
874 FsmChangeState(fi, ST_L2_4);
879 enquiry_cr(struct PStack *st, u_char typ, u_char cr, u_char pf)
883 u_char tmp[MAX_HEADER_LEN];
887 i = sethdraddr(l2, tmp, cr);
888 if (test_bit(FLG_MOD128, &l2->flag)) {
890 tmp[i++] = (l2->vr << 1) | (pf ? 1 : 0);
892 tmp[i++] = (l2->vr << 5) | typ | (pf ? 0x10 : 0);
893 if (!(skb = alloc_skb(i, GFP_ATOMIC))) {
894 printk(KERN_WARNING "isdl2 can't alloc sbbuff for enquiry_cr\n");
897 memcpy(skb_put(skb, i), tmp, i);
898 enqueue_super(st, skb);
902 enquiry_response(struct PStack *st)
904 if (test_bit(FLG_OWN_BUSY, &st->l2.flag))
905 enquiry_cr(st, RNR, RSP, 1);
907 enquiry_cr(st, RR, RSP, 1);
908 test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
912 transmit_enquiry(struct PStack *st)
914 if (test_bit(FLG_OWN_BUSY, &st->l2.flag))
915 enquiry_cr(st, RNR, CMD, 1);
917 enquiry_cr(st, RR, CMD, 1);
918 test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
924 nrerrorrecovery(struct FsmInst *fi)
926 struct PStack *st = fi->userdata;
928 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'J');
930 test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
934 invoke_retransmission(struct PStack *st, unsigned int nr)
936 struct Layer2 *l2 = &st->l2;
940 spin_lock_irqsave(&l2->lock, flags);
942 while (l2->vs != nr) {
944 if (test_bit(FLG_MOD128, &l2->flag)) {
946 p1 = (l2->vs - l2->va) % 128;
949 p1 = (l2->vs - l2->va) % 8;
951 p1 = (p1 + l2->sow) % l2->window;
952 if (test_bit(FLG_LAPB, &l2->flag))
953 st->l1.bcs->tx_cnt += l2->windowar[p1]->len + l2headersize(l2, 0);
954 skb_queue_head(&l2->i_queue, l2->windowar[p1]);
955 l2->windowar[p1] = NULL;
957 spin_unlock_irqrestore(&l2->lock, flags);
958 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
961 spin_unlock_irqrestore(&l2->lock, flags);
965 l2_st7_got_super(struct FsmInst *fi, int event, void *arg)
967 struct PStack *st = fi->userdata;
968 struct sk_buff *skb = arg;
969 int PollFlag, rsp, typ = RR;
971 struct Layer2 *l2 = &st->l2;
973 rsp = *skb->data & 0x2;
974 if (test_bit(FLG_ORIG, &l2->flag))
977 skb_pull(skb, l2addrsize(l2));
978 if (IsRNR(skb->data, st)) {
983 if (IsREJ(skb->data, st))
986 if (test_bit(FLG_MOD128, &l2->flag)) {
987 PollFlag = (skb->data[1] & 0x1) == 0x1;
988 nr = skb->data[1] >> 1;
990 PollFlag = (skb->data[0] & 0x10);
991 nr = (skb->data[0] >> 5) & 0x7;
997 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'A');
999 enquiry_response(st);
1001 if (legalnr(st, nr)) {
1004 invoke_retransmission(st, nr);
1006 if (FsmAddTimer(&st->l2.t203, st->l2.T203,
1007 EV_L2_T203, NULL, 6))
1008 l2m_debug(&st->l2.l2m, "Restart T203 ST7 REJ");
1009 } else if ((nr == l2->vs) && (typ == RR)) {
1012 FsmRestartTimer(&st->l2.t203, st->l2.T203,
1013 EV_L2_T203, NULL, 7);
1014 } else if ((l2->va != nr) || (typ == RNR)) {
1016 if (typ != RR) FsmDelTimer(&st->l2.t203, 9);
1017 restart_t200(st, 12);
1019 if (!skb_queue_empty(&st->l2.i_queue) && (typ == RR))
1020 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1022 nrerrorrecovery(fi);
1026 l2_feed_i_if_reest(struct FsmInst *fi, int event, void *arg)
1028 struct PStack *st = fi->userdata;
1029 struct sk_buff *skb = arg;
1031 if (test_bit(FLG_LAPB, &st->l2.flag))
1032 st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
1033 if (!test_bit(FLG_L3_INIT, &st->l2.flag))
1034 skb_queue_tail(&st->l2.i_queue, skb);
1040 l2_feed_i_pull(struct FsmInst *fi, int event, void *arg)
1042 struct PStack *st = fi->userdata;
1043 struct sk_buff *skb = arg;
1045 if (test_bit(FLG_LAPB, &st->l2.flag))
1046 st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
1047 skb_queue_tail(&st->l2.i_queue, skb);
1048 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1052 l2_feed_iqueue(struct FsmInst *fi, int event, void *arg)
1054 struct PStack *st = fi->userdata;
1055 struct sk_buff *skb = arg;
1057 if (test_bit(FLG_LAPB, &st->l2.flag))
1058 st->l1.bcs->tx_cnt += skb->len + l2headersize(&st->l2, 0);
1059 skb_queue_tail(&st->l2.i_queue, skb);
1063 l2_got_iframe(struct FsmInst *fi, int event, void *arg)
1065 struct PStack *st = fi->userdata;
1066 struct sk_buff *skb = arg;
1067 struct Layer2 *l2 = &(st->l2);
1068 int PollFlag, ns, i;
1072 if (test_bit(FLG_MOD128, &l2->flag)) {
1073 PollFlag = ((skb->data[i + 1] & 0x1) == 0x1);
1074 ns = skb->data[i] >> 1;
1075 nr = (skb->data[i + 1] >> 1) & 0x7f;
1077 PollFlag = (skb->data[i] & 0x10);
1078 ns = (skb->data[i] >> 1) & 0x7;
1079 nr = (skb->data[i] >> 5) & 0x7;
1081 if (test_bit(FLG_OWN_BUSY, &l2->flag)) {
1083 if (PollFlag) enquiry_response(st);
1084 } else if (l2->vr == ns) {
1086 if (test_bit(FLG_MOD128, &l2->flag))
1090 test_and_clear_bit(FLG_REJEXC, &l2->flag);
1093 enquiry_response(st);
1095 test_and_set_bit(FLG_ACK_PEND, &l2->flag);
1096 skb_pull(skb, l2headersize(l2, 0));
1097 st->l2.l2l3(st, DL_DATA | INDICATION, skb);
1101 if (test_and_set_bit(FLG_REJEXC, &l2->flag)) {
1103 enquiry_response(st);
1105 enquiry_cr(st, REJ, RSP, PollFlag);
1106 test_and_clear_bit(FLG_ACK_PEND, &l2->flag);
1110 if (legalnr(st, nr)) {
1111 if (!test_bit(FLG_PEER_BUSY, &st->l2.flag) && (fi->state == ST_L2_7)) {
1112 if (nr == st->l2.vs) {
1114 FsmRestartTimer(&st->l2.t203, st->l2.T203,
1115 EV_L2_T203, NULL, 7);
1116 } else if (nr != st->l2.va)
1117 restart_t200(st, 14);
1121 nrerrorrecovery(fi);
1125 if (!skb_queue_empty(&st->l2.i_queue) && (fi->state == ST_L2_7))
1126 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1127 if (test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag))
1128 enquiry_cr(st, RR, RSP, 0);
1132 l2_got_tei(struct FsmInst *fi, int event, void *arg)
1134 struct PStack *st = fi->userdata;
1136 st->l2.tei = (long) arg;
1138 if (fi->state == ST_L2_3) {
1140 test_and_set_bit(FLG_L3_INIT, &st->l2.flag);
1142 FsmChangeState(fi, ST_L2_4);
1143 if (!skb_queue_empty(&st->l2.ui_queue))
1148 l2_st5_tout_200(struct FsmInst *fi, int event, void *arg)
1150 struct PStack *st = fi->userdata;
1152 if (test_bit(FLG_LAPD, &st->l2.flag) &&
1153 test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1154 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1155 } else if (st->l2.rc == st->l2.N200) {
1156 FsmChangeState(fi, ST_L2_4);
1157 test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
1158 skb_queue_purge(&st->l2.i_queue);
1159 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'G');
1160 if (test_bit(FLG_LAPB, &st->l2.flag))
1161 st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
1162 st5_dl_release_l2l3(st);
1165 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1166 send_uframe(st, (test_bit(FLG_MOD128, &st->l2.flag) ? SABME : SABM)
1172 l2_st6_tout_200(struct FsmInst *fi, int event, void *arg)
1174 struct PStack *st = fi->userdata;
1176 if (test_bit(FLG_LAPD, &st->l2.flag) &&
1177 test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1178 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1179 } else if (st->l2.rc == st->l2.N200) {
1180 FsmChangeState(fi, ST_L2_4);
1181 test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
1182 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'H');
1183 lapb_dl_release_l2l3(st, CONFIRM);
1186 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200,
1188 send_uframe(st, DISC | 0x10, CMD);
1193 l2_st7_tout_200(struct FsmInst *fi, int event, void *arg)
1195 struct PStack *st = fi->userdata;
1197 if (test_bit(FLG_LAPD, &st->l2.flag) &&
1198 test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1199 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1202 test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
1204 FsmChangeState(fi, ST_L2_8);
1206 transmit_enquiry(st);
1211 l2_st8_tout_200(struct FsmInst *fi, int event, void *arg)
1213 struct PStack *st = fi->userdata;
1215 if (test_bit(FLG_LAPD, &st->l2.flag) &&
1216 test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1217 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 9);
1220 test_and_clear_bit(FLG_T200_RUN, &st->l2.flag);
1221 if (st->l2.rc == st->l2.N200) {
1222 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'I');
1224 test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
1226 transmit_enquiry(st);
1232 l2_st7_tout_203(struct FsmInst *fi, int event, void *arg)
1234 struct PStack *st = fi->userdata;
1236 if (test_bit(FLG_LAPD, &st->l2.flag) &&
1237 test_bit(FLG_DCHAN_BUSY, &st->l2.flag)) {
1238 FsmAddTimer(&st->l2.t203, st->l2.T203, EV_L2_T203, NULL, 9);
1241 FsmChangeState(fi, ST_L2_8);
1242 transmit_enquiry(st);
1247 l2_pull_iqueue(struct FsmInst *fi, int event, void *arg)
1249 struct PStack *st = fi->userdata;
1250 struct sk_buff *skb, *nskb;
1251 struct Layer2 *l2 = &st->l2;
1252 u_char header[MAX_HEADER_LEN];
1253 int i, hdr_space_needed;
1260 skb = skb_dequeue(&l2->i_queue);
1264 hdr_space_needed = l2headersize(l2, 0);
1265 nskb = skb_realloc_headroom(skb, hdr_space_needed);
1267 skb_queue_head(&l2->i_queue, skb);
1270 spin_lock_irqsave(&l2->lock, flags);
1271 if (test_bit(FLG_MOD128, &l2->flag))
1272 p1 = (l2->vs - l2->va) % 128;
1274 p1 = (l2->vs - l2->va) % 8;
1275 p1 = (p1 + l2->sow) % l2->window;
1276 if (l2->windowar[p1]) {
1277 printk(KERN_WARNING "isdnl2 try overwrite ack queue entry %d\n",
1279 dev_kfree_skb(l2->windowar[p1]);
1281 l2->windowar[p1] = skb;
1283 i = sethdraddr(&st->l2, header, CMD);
1285 if (test_bit(FLG_MOD128, &l2->flag)) {
1286 header[i++] = l2->vs << 1;
1287 header[i++] = l2->vr << 1;
1288 l2->vs = (l2->vs + 1) % 128;
1290 header[i++] = (l2->vr << 5) | (l2->vs << 1);
1291 l2->vs = (l2->vs + 1) % 8;
1293 spin_unlock_irqrestore(&l2->lock, flags);
1294 memcpy(skb_push(nskb, i), header, i);
1295 st->l2.l2l1(st, PH_PULL | INDICATION, nskb);
1296 test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
1297 if (!test_and_set_bit(FLG_T200_RUN, &st->l2.flag)) {
1298 FsmDelTimer(&st->l2.t203, 13);
1299 FsmAddTimer(&st->l2.t200, st->l2.T200, EV_L2_T200, NULL, 11);
1301 if (!skb_queue_empty(&l2->i_queue) && cansend(st))
1302 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1306 l2_st8_got_super(struct FsmInst *fi, int event, void *arg)
1308 struct PStack *st = fi->userdata;
1309 struct sk_buff *skb = arg;
1310 int PollFlag, rsp, rnr = 0;
1312 struct Layer2 *l2 = &st->l2;
1314 rsp = *skb->data & 0x2;
1315 if (test_bit(FLG_ORIG, &l2->flag))
1318 skb_pull(skb, l2addrsize(l2));
1320 if (IsRNR(skb->data, st)) {
1324 clear_peer_busy(l2);
1326 if (test_bit(FLG_MOD128, &l2->flag)) {
1327 PollFlag = (skb->data[1] & 0x1) == 0x1;
1328 nr = skb->data[1] >> 1;
1330 PollFlag = (skb->data[0] & 0x10);
1331 nr = (skb->data[0] >> 5) & 0x7;
1335 if (rsp && PollFlag) {
1336 if (legalnr(st, nr)) {
1338 restart_t200(st, 15);
1341 FsmAddTimer(&l2->t203, l2->T203,
1342 EV_L2_T203, NULL, 5);
1345 invoke_retransmission(st, nr);
1346 FsmChangeState(fi, ST_L2_7);
1347 if (!skb_queue_empty(&l2->i_queue) && cansend(st))
1348 st->l2.l2l1(st, PH_PULL | REQUEST, NULL);
1350 nrerrorrecovery(fi);
1352 if (!rsp && PollFlag)
1353 enquiry_response(st);
1354 if (legalnr(st, nr)) {
1357 nrerrorrecovery(fi);
1362 l2_got_FRMR(struct FsmInst *fi, int event, void *arg)
1364 struct PStack *st = fi->userdata;
1365 struct sk_buff *skb = arg;
1367 skb_pull(skb, l2addrsize(&st->l2) + 1);
1369 if (!(skb->data[0] & 1) || ((skb->data[0] & 3) == 1) || /* I or S */
1370 (IsUA(skb->data) && (fi->state == ST_L2_7))) {
1371 st->ma.layer(st, MDL_ERROR | INDICATION, (void *) 'K');
1373 test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
1379 l2_st24_tei_remove(struct FsmInst *fi, int event, void *arg)
1381 struct PStack *st = fi->userdata;
1383 skb_queue_purge(&st->l2.ui_queue);
1385 FsmChangeState(fi, ST_L2_1);
1389 l2_st3_tei_remove(struct FsmInst *fi, int event, void *arg)
1391 struct PStack *st = fi->userdata;
1393 skb_queue_purge(&st->l2.ui_queue);
1395 st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
1396 FsmChangeState(fi, ST_L2_1);
1400 l2_st5_tei_remove(struct FsmInst *fi, int event, void *arg)
1402 struct PStack *st = fi->userdata;
1404 skb_queue_purge(&st->l2.i_queue);
1405 skb_queue_purge(&st->l2.ui_queue);
1409 st5_dl_release_l2l3(st);
1410 FsmChangeState(fi, ST_L2_1);
1414 l2_st6_tei_remove(struct FsmInst *fi, int event, void *arg)
1416 struct PStack *st = fi->userdata;
1418 skb_queue_purge(&st->l2.ui_queue);
1421 st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
1422 FsmChangeState(fi, ST_L2_1);
1426 l2_tei_remove(struct FsmInst *fi, int event, void *arg)
1428 struct PStack *st = fi->userdata;
1430 skb_queue_purge(&st->l2.i_queue);
1431 skb_queue_purge(&st->l2.ui_queue);
1435 FsmDelTimer(&st->l2.t203, 19);
1436 st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
1437 FsmChangeState(fi, ST_L2_1);
1441 l2_st14_persistent_da(struct FsmInst *fi, int event, void *arg)
1443 struct PStack *st = fi->userdata;
1445 skb_queue_purge(&st->l2.i_queue);
1446 skb_queue_purge(&st->l2.ui_queue);
1447 if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag))
1448 st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
1452 l2_st5_persistent_da(struct FsmInst *fi, int event, void *arg)
1454 struct PStack *st = fi->userdata;
1456 skb_queue_purge(&st->l2.i_queue);
1457 skb_queue_purge(&st->l2.ui_queue);
1460 st5_dl_release_l2l3(st);
1461 FsmChangeState(fi, ST_L2_4);
1465 l2_st6_persistent_da(struct FsmInst *fi, int event, void *arg)
1467 struct PStack *st = fi->userdata;
1469 skb_queue_purge(&st->l2.ui_queue);
1471 st->l2.l2l3(st, DL_RELEASE | CONFIRM, NULL);
1472 FsmChangeState(fi, ST_L2_4);
1476 l2_persistent_da(struct FsmInst *fi, int event, void *arg)
1478 struct PStack *st = fi->userdata;
1480 skb_queue_purge(&st->l2.i_queue);
1481 skb_queue_purge(&st->l2.ui_queue);
1484 FsmDelTimer(&st->l2.t203, 19);
1485 st->l2.l2l3(st, DL_RELEASE | INDICATION, NULL);
1486 FsmChangeState(fi, ST_L2_4);
1490 l2_set_own_busy(struct FsmInst *fi, int event, void *arg)
1492 struct PStack *st = fi->userdata;
1494 if (!test_and_set_bit(FLG_OWN_BUSY, &st->l2.flag)) {
1495 enquiry_cr(st, RNR, RSP, 0);
1496 test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
1501 l2_clear_own_busy(struct FsmInst *fi, int event, void *arg)
1503 struct PStack *st = fi->userdata;
1505 if (!test_and_clear_bit(FLG_OWN_BUSY, &st->l2.flag)) {
1506 enquiry_cr(st, RR, RSP, 0);
1507 test_and_clear_bit(FLG_ACK_PEND, &st->l2.flag);
1512 l2_frame_error(struct FsmInst *fi, int event, void *arg)
1514 struct PStack *st = fi->userdata;
1516 st->ma.layer(st, MDL_ERROR | INDICATION, arg);
1520 l2_frame_error_reest(struct FsmInst *fi, int event, void *arg)
1522 struct PStack *st = fi->userdata;
1524 st->ma.layer(st, MDL_ERROR | INDICATION, arg);
1526 test_and_clear_bit(FLG_L3_INIT, &st->l2.flag);
1529 static struct FsmNode L2FnList[] __initdata =
1531 {ST_L2_1, EV_L2_DL_ESTABLISH_REQ, l2_mdl_assign},
1532 {ST_L2_2, EV_L2_DL_ESTABLISH_REQ, l2_go_st3},
1533 {ST_L2_4, EV_L2_DL_ESTABLISH_REQ, l2_establish},
1534 {ST_L2_5, EV_L2_DL_ESTABLISH_REQ, l2_discard_i_setl3},
1535 {ST_L2_7, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish},
1536 {ST_L2_8, EV_L2_DL_ESTABLISH_REQ, l2_l3_reestablish},
1537 {ST_L2_4, EV_L2_DL_RELEASE_REQ, l2_release},
1538 {ST_L2_5, EV_L2_DL_RELEASE_REQ, l2_pend_rel},
1539 {ST_L2_7, EV_L2_DL_RELEASE_REQ, l2_disconnect},
1540 {ST_L2_8, EV_L2_DL_RELEASE_REQ, l2_disconnect},
1541 {ST_L2_5, EV_L2_DL_DATA, l2_feed_i_if_reest},
1542 {ST_L2_7, EV_L2_DL_DATA, l2_feed_i_pull},
1543 {ST_L2_8, EV_L2_DL_DATA, l2_feed_iqueue},
1544 {ST_L2_1, EV_L2_DL_UNIT_DATA, l2_queue_ui_assign},
1545 {ST_L2_2, EV_L2_DL_UNIT_DATA, l2_queue_ui},
1546 {ST_L2_3, EV_L2_DL_UNIT_DATA, l2_queue_ui},
1547 {ST_L2_4, EV_L2_DL_UNIT_DATA, l2_send_ui},
1548 {ST_L2_5, EV_L2_DL_UNIT_DATA, l2_send_ui},
1549 {ST_L2_6, EV_L2_DL_UNIT_DATA, l2_send_ui},
1550 {ST_L2_7, EV_L2_DL_UNIT_DATA, l2_send_ui},
1551 {ST_L2_8, EV_L2_DL_UNIT_DATA, l2_send_ui},
1552 {ST_L2_1, EV_L2_MDL_ASSIGN, l2_got_tei},
1553 {ST_L2_2, EV_L2_MDL_ASSIGN, l2_got_tei},
1554 {ST_L2_3, EV_L2_MDL_ASSIGN, l2_got_tei},
1555 {ST_L2_2, EV_L2_MDL_ERROR, l2_st24_tei_remove},
1556 {ST_L2_3, EV_L2_MDL_ERROR, l2_st3_tei_remove},
1557 {ST_L2_4, EV_L2_MDL_REMOVE, l2_st24_tei_remove},
1558 {ST_L2_5, EV_L2_MDL_REMOVE, l2_st5_tei_remove},
1559 {ST_L2_6, EV_L2_MDL_REMOVE, l2_st6_tei_remove},
1560 {ST_L2_7, EV_L2_MDL_REMOVE, l2_tei_remove},
1561 {ST_L2_8, EV_L2_MDL_REMOVE, l2_tei_remove},
1562 {ST_L2_4, EV_L2_SABME, l2_start_multi},
1563 {ST_L2_5, EV_L2_SABME, l2_send_UA},
1564 {ST_L2_6, EV_L2_SABME, l2_send_DM},
1565 {ST_L2_7, EV_L2_SABME, l2_restart_multi},
1566 {ST_L2_8, EV_L2_SABME, l2_restart_multi},
1567 {ST_L2_4, EV_L2_DISC, l2_send_DM},
1568 {ST_L2_5, EV_L2_DISC, l2_send_DM},
1569 {ST_L2_6, EV_L2_DISC, l2_send_UA},
1570 {ST_L2_7, EV_L2_DISC, l2_stop_multi},
1571 {ST_L2_8, EV_L2_DISC, l2_stop_multi},
1572 {ST_L2_4, EV_L2_UA, l2_mdl_error_ua},
1573 {ST_L2_5, EV_L2_UA, l2_connected},
1574 {ST_L2_6, EV_L2_UA, l2_released},
1575 {ST_L2_7, EV_L2_UA, l2_mdl_error_ua},
1576 {ST_L2_8, EV_L2_UA, l2_mdl_error_ua},
1577 {ST_L2_4, EV_L2_DM, l2_reestablish},
1578 {ST_L2_5, EV_L2_DM, l2_st5_dm_release},
1579 {ST_L2_6, EV_L2_DM, l2_st6_dm_release},
1580 {ST_L2_7, EV_L2_DM, l2_mdl_error_dm},
1581 {ST_L2_8, EV_L2_DM, l2_st8_mdl_error_dm},
1582 {ST_L2_1, EV_L2_UI, l2_got_ui},
1583 {ST_L2_2, EV_L2_UI, l2_got_ui},
1584 {ST_L2_3, EV_L2_UI, l2_got_ui},
1585 {ST_L2_4, EV_L2_UI, l2_got_ui},
1586 {ST_L2_5, EV_L2_UI, l2_got_ui},
1587 {ST_L2_6, EV_L2_UI, l2_got_ui},
1588 {ST_L2_7, EV_L2_UI, l2_got_ui},
1589 {ST_L2_8, EV_L2_UI, l2_got_ui},
1590 {ST_L2_7, EV_L2_FRMR, l2_got_FRMR},
1591 {ST_L2_8, EV_L2_FRMR, l2_got_FRMR},
1592 {ST_L2_7, EV_L2_SUPER, l2_st7_got_super},
1593 {ST_L2_8, EV_L2_SUPER, l2_st8_got_super},
1594 {ST_L2_7, EV_L2_I, l2_got_iframe},
1595 {ST_L2_8, EV_L2_I, l2_got_iframe},
1596 {ST_L2_5, EV_L2_T200, l2_st5_tout_200},
1597 {ST_L2_6, EV_L2_T200, l2_st6_tout_200},
1598 {ST_L2_7, EV_L2_T200, l2_st7_tout_200},
1599 {ST_L2_8, EV_L2_T200, l2_st8_tout_200},
1600 {ST_L2_7, EV_L2_T203, l2_st7_tout_203},
1601 {ST_L2_7, EV_L2_ACK_PULL, l2_pull_iqueue},
1602 {ST_L2_7, EV_L2_SET_OWN_BUSY, l2_set_own_busy},
1603 {ST_L2_8, EV_L2_SET_OWN_BUSY, l2_set_own_busy},
1604 {ST_L2_7, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy},
1605 {ST_L2_8, EV_L2_CLEAR_OWN_BUSY, l2_clear_own_busy},
1606 {ST_L2_4, EV_L2_FRAME_ERROR, l2_frame_error},
1607 {ST_L2_5, EV_L2_FRAME_ERROR, l2_frame_error},
1608 {ST_L2_6, EV_L2_FRAME_ERROR, l2_frame_error},
1609 {ST_L2_7, EV_L2_FRAME_ERROR, l2_frame_error_reest},
1610 {ST_L2_8, EV_L2_FRAME_ERROR, l2_frame_error_reest},
1611 {ST_L2_1, EV_L1_DEACTIVATE, l2_st14_persistent_da},
1612 {ST_L2_2, EV_L1_DEACTIVATE, l2_st24_tei_remove},
1613 {ST_L2_3, EV_L1_DEACTIVATE, l2_st3_tei_remove},
1614 {ST_L2_4, EV_L1_DEACTIVATE, l2_st14_persistent_da},
1615 {ST_L2_5, EV_L1_DEACTIVATE, l2_st5_persistent_da},
1616 {ST_L2_6, EV_L1_DEACTIVATE, l2_st6_persistent_da},
1617 {ST_L2_7, EV_L1_DEACTIVATE, l2_persistent_da},
1618 {ST_L2_8, EV_L1_DEACTIVATE, l2_persistent_da},
1622 isdnl2_l1l2(struct PStack *st, int pr, void *arg)
1624 struct sk_buff *skb = arg;
1630 case (PH_DATA | INDICATION):
1632 len = l2addrsize(&st->l2);
1636 FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'N');
1640 if (!(*datap & 1)) { /* I-Frame */
1641 if (!(c = iframe_error(st, skb)))
1642 ret = FsmEvent(&st->l2.l2m, EV_L2_I, skb);
1643 } else if (IsSFrame(datap, st)) { /* S-Frame */
1644 if (!(c = super_error(st, skb)))
1645 ret = FsmEvent(&st->l2.l2m, EV_L2_SUPER, skb);
1646 } else if (IsUI(datap)) {
1647 if (!(c = UI_error(st, skb)))
1648 ret = FsmEvent(&st->l2.l2m, EV_L2_UI, skb);
1649 } else if (IsSABME(datap, st)) {
1650 if (!(c = unnum_error(st, skb, CMD)))
1651 ret = FsmEvent(&st->l2.l2m, EV_L2_SABME, skb);
1652 } else if (IsUA(datap)) {
1653 if (!(c = unnum_error(st, skb, RSP)))
1654 ret = FsmEvent(&st->l2.l2m, EV_L2_UA, skb);
1655 } else if (IsDISC(datap)) {
1656 if (!(c = unnum_error(st, skb, CMD)))
1657 ret = FsmEvent(&st->l2.l2m, EV_L2_DISC, skb);
1658 } else if (IsDM(datap)) {
1659 if (!(c = unnum_error(st, skb, RSP)))
1660 ret = FsmEvent(&st->l2.l2m, EV_L2_DM, skb);
1661 } else if (IsFRMR(datap)) {
1662 if (!(c = FRMR_error(st, skb)))
1663 ret = FsmEvent(&st->l2.l2m, EV_L2_FRMR, skb);
1665 FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *) 'L');
1671 FsmEvent(&st->l2.l2m, EV_L2_FRAME_ERROR, (void *)(long)c);
1677 case (PH_PULL | CONFIRM):
1678 FsmEvent(&st->l2.l2m, EV_L2_ACK_PULL, arg);
1680 case (PH_PAUSE | INDICATION):
1681 test_and_set_bit(FLG_DCHAN_BUSY, &st->l2.flag);
1683 case (PH_PAUSE | CONFIRM):
1684 test_and_clear_bit(FLG_DCHAN_BUSY, &st->l2.flag);
1686 case (PH_ACTIVATE | CONFIRM):
1687 case (PH_ACTIVATE | INDICATION):
1688 test_and_set_bit(FLG_L1_ACTIV, &st->l2.flag);
1689 if (test_and_clear_bit(FLG_ESTAB_PEND, &st->l2.flag))
1690 FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg);
1692 case (PH_DEACTIVATE | INDICATION):
1693 case (PH_DEACTIVATE | CONFIRM):
1694 test_and_clear_bit(FLG_L1_ACTIV, &st->l2.flag);
1695 FsmEvent(&st->l2.l2m, EV_L1_DEACTIVATE, arg);
1698 l2m_debug(&st->l2.l2m, "l2 unknown pr %04x", pr);
1704 isdnl2_l3l2(struct PStack *st, int pr, void *arg)
1707 case (DL_DATA | REQUEST):
1708 if (FsmEvent(&st->l2.l2m, EV_L2_DL_DATA, arg)) {
1709 dev_kfree_skb((struct sk_buff *) arg);
1712 case (DL_UNIT_DATA | REQUEST):
1713 if (FsmEvent(&st->l2.l2m, EV_L2_DL_UNIT_DATA, arg)) {
1714 dev_kfree_skb((struct sk_buff *) arg);
1717 case (DL_ESTABLISH | REQUEST):
1718 if (test_bit(FLG_L1_ACTIV, &st->l2.flag)) {
1719 if (test_bit(FLG_LAPD, &st->l2.flag) ||
1720 test_bit(FLG_ORIG, &st->l2.flag)) {
1721 FsmEvent(&st->l2.l2m, EV_L2_DL_ESTABLISH_REQ, arg);
1724 if (test_bit(FLG_LAPD, &st->l2.flag) ||
1725 test_bit(FLG_ORIG, &st->l2.flag)) {
1726 test_and_set_bit(FLG_ESTAB_PEND, &st->l2.flag);
1728 st->l2.l2l1(st, PH_ACTIVATE, NULL);
1731 case (DL_RELEASE | REQUEST):
1732 if (test_bit(FLG_LAPB, &st->l2.flag)) {
1733 st->l2.l2l1(st, PH_DEACTIVATE, NULL);
1735 FsmEvent(&st->l2.l2m, EV_L2_DL_RELEASE_REQ, arg);
1737 case (MDL_ASSIGN | REQUEST):
1738 FsmEvent(&st->l2.l2m, EV_L2_MDL_ASSIGN, arg);
1740 case (MDL_REMOVE | REQUEST):
1741 FsmEvent(&st->l2.l2m, EV_L2_MDL_REMOVE, arg);
1743 case (MDL_ERROR | RESPONSE):
1744 FsmEvent(&st->l2.l2m, EV_L2_MDL_ERROR, arg);
1750 releasestack_isdnl2(struct PStack *st)
1752 FsmDelTimer(&st->l2.t200, 21);
1753 FsmDelTimer(&st->l2.t203, 16);
1754 skb_queue_purge(&st->l2.i_queue);
1755 skb_queue_purge(&st->l2.ui_queue);
1756 ReleaseWin(&st->l2);
1760 l2m_debug(struct FsmInst *fi, char *fmt, ...)
1763 struct PStack *st = fi->userdata;
1765 va_start(args, fmt);
1766 VHiSax_putstatus(st->l1.hardware, st->l2.debug_id, fmt, args);
1771 setstack_isdnl2(struct PStack *st, char *debug_id)
1773 spin_lock_init(&st->l2.lock);
1774 st->l1.l1l2 = isdnl2_l1l2;
1775 st->l3.l3l2 = isdnl2_l3l2;
1777 skb_queue_head_init(&st->l2.i_queue);
1778 skb_queue_head_init(&st->l2.ui_queue);
1782 st->l2.l2m.fsm = &l2fsm;
1783 if (test_bit(FLG_LAPB, &st->l2.flag))
1784 st->l2.l2m.state = ST_L2_4;
1786 st->l2.l2m.state = ST_L2_1;
1787 st->l2.l2m.debug = 0;
1788 st->l2.l2m.userdata = st;
1789 st->l2.l2m.userint = 0;
1790 st->l2.l2m.printdebug = l2m_debug;
1791 strcpy(st->l2.debug_id, debug_id);
1793 FsmInitTimer(&st->l2.l2m, &st->l2.t200);
1794 FsmInitTimer(&st->l2.l2m, &st->l2.t203);
1798 transl2_l3l2(struct PStack *st, int pr, void *arg)
1801 case (DL_DATA | REQUEST):
1802 case (DL_UNIT_DATA | REQUEST):
1803 st->l2.l2l1(st, PH_DATA | REQUEST, arg);
1805 case (DL_ESTABLISH | REQUEST):
1806 st->l2.l2l1(st, PH_ACTIVATE | REQUEST, NULL);
1808 case (DL_RELEASE | REQUEST):
1809 st->l2.l2l1(st, PH_DEACTIVATE | REQUEST, NULL);
1815 setstack_transl2(struct PStack *st)
1817 st->l3.l3l2 = transl2_l3l2;
1821 releasestack_transl2(struct PStack *st)
1828 l2fsm.state_count = L2_STATE_COUNT;
1829 l2fsm.event_count = L2_EVENT_COUNT;
1830 l2fsm.strEvent = strL2Event;
1831 l2fsm.strState = strL2State;
1832 return FsmNew(&l2fsm, L2FnList, ARRAY_SIZE(L2FnList));