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static char _ispyid[] = "@(#)$Id: iispy.c,v 1.2 1995/02/15 06:28:27 jkh Exp $";
/*******************************************************************************
* II - Version 0.1 $Revision: 1.2 $ $State: Exp $
*
* Copyright 1994 Dietmar Friede
*******************************************************************************
* Bug reports, patches, comments, suggestions should be sent to:
*
* jkr@saarlink.de or jkrause@guug.de
*
*******************************************************************************
* $Log: iispy.c,v $
* Revision 1.2 1995/02/15 06:28:27 jkh
* Fix up include paths, nuke some warnings.
*
* Revision 1.1 1995/02/14 15:00:29 jkh
* An ISDN driver that supports the EDSS1 and the 1TR6 ISDN interfaces.
* EDSS1 is the "Euro-ISDN", 1TR6 is the soon obsolete german ISDN Interface.
* Obtained from: Dietmar Friede <dfriede@drnhh.neuhaus.de> and
* Juergen Krause <jkr@saarlink.de>
*
* This is only one part - the rest to follow in a couple of hours.
* This part is a benign import, since it doesn't affect anything else.
*
*
******************************************************************************/
#include "ispy.h"
#if NISPY > 0
#include "param.h"
#include "buf.h"
#include "systm.h"
#include "ioctl.h"
#include "tty.h"
#include "proc.h"
#include "user.h"
#include "uio.h"
#include "kernel.h"
/*#include "malloc.h"*/
#include "gnu/isdn/isdn_ioctl.h"
int nispy = NISPY;
int ispy_applnr;
static int next_if =0;
static unsigned long ispy_cnt, ispy_out;
static char dir;
#define ISPY_SIZE 260
#define OPEN 1
#define READ_WAIT 2
#define ISPYBUF 16
#define ISPYMASK (ISPYBUF-1)
/* ISPYBUF has to be a power of 2 */
static
struct ispy_data
{
struct ispy_buf
{
unsigned long cnt;
struct timeval stamp;
char ibuf[ISPY_SIZE];
unsigned char dir;
int ilen;
} b[ISPYBUF];
int state;
} ispy_data[NISPY];
int
ispyattach(int ap)
{
struct ispy_data *ispy;
if(next_if >= NISPY)
return(-1);
ispy= &ispy_data[next_if];
ispy->state= 0;
ispy_applnr= ap;
return(next_if++);
}
int
ispy_input(int no, int len, char *buf, int out)
{
struct ispy_data *ispy= &ispy_data[no];
struct ispy_buf *b= &ispy->b[ispy_cnt&ISPYMASK];
if(len > ISPY_SIZE)
return(0);
if(len)
{
b->cnt= ispy_cnt++;
b->stamp= time;
b->dir= out;
bcopy(buf, b->ibuf, len);
}
b->ilen= len;
if(ispy->state & READ_WAIT)
{
ispy->state &= ~READ_WAIT;
wakeup((caddr_t) &ispy->state);
}
return(len);
}
int
ispyopen(dev_t dev, int flag)
{
int err;
struct ispy_data *ispy;
if (minor(dev)>NISPY)
return (ENXIO);
ispy= &ispy_data[minor(dev)];
if(ispy->state&OPEN) return(EBUSY);
ispy->state |= OPEN;
return (0);
}
int
ispyclose(dev_t dev, int flag)
{
struct ispy_data *ispy= &ispy_data[minor(dev)];
if(ispy->state & READ_WAIT)
wakeup((caddr_t) &ispy->state);
ispy->state = 0;
return (0);
}
int
ispyioctl (dev, cmd, data, flag)
dev_t dev;
caddr_t data;
int cmd, flag;
{
int unit = minor(dev);
switch (cmd) {
default:
return (ENOTTY);
}
return (0);
}
int
ispyread(dev_t dev, struct uio * uio)
{
int x;
int error = 0;
struct ispy_data *ispy= &ispy_data[minor(dev)];
struct ispy_buf *b;
if((ispy_cnt-ispy_out) > ISPYBUF)
ispy_out= ispy_cnt - ISPYBUF;
b= &ispy->b[ispy_out&ISPYMASK];
ispy_out++;
while(b->ilen == 0)
{
ispy->state |= READ_WAIT;
if(error= tsleep((caddr_t) &ispy->state, TTIPRI | PCATCH, "ispy", 0 ))
return(error);
}
x = splhigh();
if(b->ilen)
{
error = uiomove((char *) &b->dir, 1, uio);
if(error == 0)
error = uiomove((char *) &b->cnt
,sizeof(unsigned long)+sizeof(struct timeval)+b->ilen, uio);
b->ilen= 0;
}
splx(x);
return error;
}
#endif
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