/*
	Compile it with "-DMODULE -D__KERNEL__ -c". Use
insmod sdummy.o COUNT=16

--------------------------------------------------------------
*/
/* sdummy netdevice for Linux */
/* Copyright (C) 1995 -- Joel Katz */

/* Based upon the Linux skeleton net driver by Donald Becker */
/* which is copyright 1993 by the United States Government.  */

/* CAUTION: Do not attempt to compile with GCC-2.6.4-950158 */

static char *version =
 "sdummy.c : v1.0 (C)1995 - Joel Katz <Stimpson@Panix.COM>\n";
#include <linux/config.h>

#ifndef MODULE
#error Module Only!
#endif

#ifndef __KERNEL__
#error This is a kernel module
#endif

#include <linux/module.h>
#include <linux/version.h>

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>

int COUNT=16;

static int sdummy_open(struct device *dev)
{
 MOD_INC_USE_COUNT;
 if(dev) dev->irq++;
 return 0;
}

static int sdummy_close(struct device *dev)
{
 MOD_DEC_USE_COUNT;
 if(dev) dev->irq--;
 return 0;
}

static int sdummy_xmit(struct sk_buff *skb, struct device *dev)
{
 if((skb==NULL)||(dev==NULL)) return 0;
 kfree_skb(skb,FREE_WRITE);
}

static int sdummy_probe(struct device *dev)
{
    ether_setup(dev);
    dev->flags|=IFF_NOARP;
    dev->open = sdummy_open;
    dev->stop = sdummy_close;
    dev->hard_start_xmit=sdummy_xmit;
    return 0;
}

char kernel_version[] = UTS_RELEASE;

struct device dev_sdummy[16] = {
        { "dmy0",0,0,0,0,0,0,0,0,0,NULL,sdummy_probe },
        { "dmy1",0,0,0,0,1,0,0,0,0,NULL,sdummy_probe },
        { "dmy2",0,0,0,0,2,0,0,0,0,NULL,sdummy_probe },
        { "dmy3",0,0,0,0,3,0,0,0,0,NULL,sdummy_probe },
        { "dmy4",0,0,0,0,4,0,0,0,0,NULL,sdummy_probe },
        { "dmy5",0,0,0,0,5,0,0,0,0,NULL,sdummy_probe },
        { "dmy6",0,0,0,0,6,0,0,0,0,NULL,sdummy_probe },
        { "dmy7",0,0,0,0,7,0,0,0,0,NULL,sdummy_probe },
        { "dmy8",0,0,0,0,8,0,0,0,0,NULL,sdummy_probe },
        { "dmy9",0,0,0,0,9,0,0,0,0,NULL,sdummy_probe },
        { "dmy10",0,0,0,0,10,0,0,0,0,NULL,sdummy_probe },
        { "dmy11",0,0,0,0,11,0,0,0,0,NULL,sdummy_probe },
        { "dmy12",0,0,0,0,12,0,0,0,0,NULL,sdummy_probe },
        { "dmy13",0,0,0,0,13,0,0,0,0,NULL,sdummy_probe },
        { "dmy14",0,0,0,0,14,0,0,0,0,NULL,sdummy_probe },
        { "dmy15",0,0,0,0,15,0,0,0,0,NULL,sdummy_probe },
         };
              
int init_module(void)
{
 int i,j=0;
 if((COUNT>16)||(COUNT<1)) return -EIO;
 for(i=0; i<COUNT; i++)
  if(register_netdev(dev_sdummy+i)==0) j++;
 if(j==0) return -EIO;
 printk(version);
 printk("%d devices installed\n",j);
 COUNT=j;
 return 0;
}

void cleanup_module(void)
{
 int i;
 if(MOD_IN_USE) /* This check is really unnecessary */
 {
  printk("sdummy: cannot remove.\n");
  return;
 }
 for(i=0; i<COUNT; i++)
  unregister_netdev(dev_sdummy+i);
 printk("sdummy: module removed\n");
}