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/* $Id: tei.c,v 1.1 1996/04/13 10:28:25 fritz Exp $
*
* $Log: tei.c,v $
* Revision 1.1 1996/04/13 10:28:25 fritz
* Initial revision
*
*
*/
#define __NO_VERSION__
#include "teles.h"
extern struct IsdnCard cards[];
extern int nrcards;
static struct PStack *
findces(struct PStack *st, int ces)
{
struct PStack *ptr = *(st->l1.stlistp);
while (ptr)
if (ptr->l2.ces == ces)
return (ptr);
else
ptr = ptr->next;
return (NULL);
}
static struct PStack *
findtei(struct PStack *st, int tei)
{
struct PStack *ptr = *(st->l1.stlistp);
if (tei == 127)
return (NULL);
while (ptr)
if (ptr->l2.tei == tei)
return (ptr);
else
ptr = ptr->next;
return (NULL);
}
void
tei_handler(struct PStack *st,
byte pr, struct BufHeader *ibh)
{
byte *bp;
unsigned int tces;
struct PStack *otsp, *ptr;
unsigned int data;
if (st->l2.debug)
printk(KERN_DEBUG "teihandler %d\n", pr);
switch (pr) {
case (MDL_ASSIGN):
data = (unsigned int) ibh;
BufPoolGet(&ibh, st->l1.smallpool, GFP_ATOMIC, (void *) st, 6);
if (!ibh)
return;
bp = DATAPTR(ibh);
bp += st->l2.uihsize;
bp[0] = 0xf;
bp[1] = data >> 8;
bp[2] = data & 0xff;
bp[3] = 0x1;
bp[4] = 0xff;
ibh->datasize = 8;
st->l3.l3l2(st, DL_UNIT_DATA, ibh);
break;
case (DL_UNIT_DATA):
bp = DATAPTR(ibh);
bp += 3;
if (bp[0] != 0xf)
break;
switch (bp[3]) {
case (2):
tces = (bp[1] << 8) | bp[2];
BufPoolRelease(ibh);
if (st->l3.debug)
printk(KERN_DEBUG "tei identity assigned for %d=%d\n", tces,
bp[4] >> 1);
if ((otsp = findces(st, tces)))
otsp->ma.teil2(otsp, MDL_ASSIGN,
(void *)(bp[4] >> 1));
break;
case (4):
if (st->l3.debug)
printk(KERN_DEBUG "checking identity for %d\n", bp[4] >> 1);
if (bp[4] >> 1 == 0x7f) {
BufPoolRelease(ibh);
ptr = *(st->l1.stlistp);
while (ptr) {
if ((ptr->l2.tei & 0x7f) != 0x7f) {
if (BufPoolGet(&ibh, st->l1.smallpool, GFP_ATOMIC, (void *) st, 7))
break;
bp = DATAPTR(ibh);
bp += 3;
bp[0] = 0xf;
bp[1] = ptr->l2.ces >> 8;
bp[2] = ptr->l2.ces & 0xff;
bp[3] = 0x5;
bp[4] = (ptr->l2.tei << 1) | 1;
ibh->datasize = 8;
st->l3.l3l2(st, DL_UNIT_DATA, ibh);
}
ptr = ptr->next;
}
} else {
otsp = findtei(st, bp[4] >> 1);
BufPoolRelease(ibh);
if (!otsp)
break;
if (st->l3.debug)
printk(KERN_DEBUG "ces is %d\n", otsp->l2.ces);
if (BufPoolGet(&ibh, st->l1.smallpool, GFP_ATOMIC, (void *) st, 7))
break;
bp = DATAPTR(ibh);
bp += 3;
bp[0] = 0xf;
bp[1] = otsp->l2.ces >> 8;
bp[2] = otsp->l2.ces & 0xff;
bp[3] = 0x5;
bp[4] = (otsp->l2.tei << 1) | 1;
ibh->datasize = 8;
st->l3.l3l2(st, DL_UNIT_DATA, ibh);
}
break;
default:
BufPoolRelease(ibh);
if (st->l3.debug)
printk(KERN_DEBUG "tei message unknown %d ai %d\n", bp[3], bp[4] >> 1);
}
break;
default:
printk(KERN_WARNING "tei handler unknown primitive %d\n", pr);
break;
}
}
unsigned int
randomces(void)
{
int x = jiffies & 0xffff;
return (x);
}
static void
tei_man(struct PStack *sp, int i, void *v)
{
printk(KERN_DEBUG "tei_man\n");
}
static void
tei_l2tei(struct PStack *st, int pr, void *arg)
{
struct IsdnCardState *sp = st->l1.hardware;
tei_handler(sp->teistack, pr, arg);
}
void
setstack_tei(struct PStack *st)
{
st->l2.l2tei = tei_l2tei;
}
static void
init_tei(struct IsdnCardState *sp, int protocol)
{
struct PStack *st;
char tmp[128];
#define DIRTY_HACK_AGAINST_SIGSEGV
st = (struct PStack *) Smalloc(sizeof(struct PStack), GFP_KERNEL,
"struct PStack");
#ifdef DIRTY_HACK_AGAINST_SIGSEGV
sp->teistack = st; /* struct is not initialized yet */
sp->teistack->protocol = protocol; /* struct is not initialized yet */
#endif /* DIRTY_HACK_AGAINST_SIGSEGV */
setstack_teles(st, sp);
st->l2.extended = !0;
st->l2.laptype = LAPD;
st->l2.window = 1;
st->l2.orig = !0;
st->protocol = protocol;
/*
* the following is not necessary for tei mng. (broadcast only)
*/
st->l2.t200 = 500; /* 500 milliseconds */
st->l2.n200 = 4; /* try 4 times */
st->l2.sap = 63;
st->l2.tei = 127;
sprintf(tmp, "Card %d tei ", sp->cardnr);
setstack_isdnl2(st, tmp);
st->l2.debug = 0;
st->l3.debug = 0;
st->ma.manl2(st, MDL_NOTEIPROC, NULL);
st->l2.l2l3 = (void *) tei_handler;
st->l1.l1man = tei_man;
st->l2.l2man = tei_man;
st->l4.l2writewakeup = NULL;
teles_addlist(sp, st);
sp->teistack = st;
}
static void
release_tei(struct IsdnCardState *sp)
{
struct PStack *st = sp->teistack;
teles_rmlist(sp, st);
Sfree((void *) st);
}
void
TeiNew(void)
{
int i;
for (i = 0; i < nrcards; i++)
if (cards[i].sp)
init_tei(cards[i].sp, cards[i].protocol);
}
void
TeiFree(void)
{
int i;
for (i = 0; i < nrcards; i++)
if (cards[i].sp)
release_tei(cards[i].sp);
}
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