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static char _ispyid[] = "@(#)$Id: iispy.c,v 1.9 1995/12/08 23:19:40 phk Exp $";
/*******************************************************************************
* II - Version 0.1 $Revision: 1.9 $ $State: Exp $
*
* Copyright 1994 Dietmar Friede
*******************************************************************************
* Bug reports, patches, comments, suggestions should be sent to:
*
* jkr@saarlink.de or jkrause@guug.de
*
*******************************************************************************
*/
#include "ispy.h"
#if NISPY > 0
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /*DEVFS*/
/*#include "malloc.h"*/
#include <gnu/isdn/isdn_ioctl.h>
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;
#ifdef DEVFS
void *devfs_token;
#endif
} ispy_data[NISPY];
static d_open_t ispyopen;
static d_close_t ispyclose;
static d_read_t ispyread;
static d_ioctl_t ispyioctl;
#define CDEV_MAJOR 59
static struct cdevsw ispy_cdevsw =
{ ispyopen, ispyclose, ispyread, nowrite, /*59*/
ispyioctl, nostop, nullreset, nodevtotty,/* ispy */
seltrue, nommap, NULL, "ispy", NULL, -1 };
int
ispyattach(int ap)
{
char name[32];
struct ispy_data *ispy;
if(next_if >= NISPY)
return(-1);
ispy= &ispy_data[next_if];
ispy->state= 0;
ispy_applnr= ap;
#ifdef DEVFS
sprintf(name,"ispy%d",next_if);
ispy->devfs_token =devfs_add_devsw("/isdn",name,&ispy_cdevsw,next_if,
DV_CHR, 0, 0, 0600);
#endif
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);
}
static int
ispyopen(dev_t dev, int flags, int fmt, struct proc *p)
{
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);
}
static int
ispyclose(dev_t dev, int flags, int fmt, struct proc *p)
{
struct ispy_data *ispy= &ispy_data[minor(dev)];
if(ispy->state & READ_WAIT)
wakeup((caddr_t) &ispy->state);
ispy->state = 0;
return (0);
}
static int
ispyioctl (dev_t dev, int cmd, caddr_t data, int flags, struct proc *p)
{
int unit = minor(dev);
switch (cmd) {
default:
return (ENOTTY);
}
return (0);
}
static int
ispyread(dev_t dev, struct uio * uio, int ioflag)
{
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;
}
static ispy_devsw_installed = 0;
static void
ispy_drvinit(void *unused)
{
dev_t dev;
if( ! ispy_devsw_installed ) {
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev,&ispy_cdevsw, NULL);
ispy_devsw_installed = 1;
}
}
SYSINIT(ispydev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,ispy_drvinit,NULL)
#endif
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