/*
  
  Copyright (c) Ixia 2003-2005
  All rights reserved.

*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <net/tcp.h>
#include <linux/skbuff.h>
#include <asm/uaccess.h>
#include <linux/netdevice.h>


int                 sClientMajorNum = 0;
static int VNICClientIoctl(struct inode *inode, struct file *file,
                           unsigned int cmd, unsigned long arg);

static int VNICClientStart(unsigned long arg);

static struct file_operations VNICFops = {
        owner:          THIS_MODULE,
        ioctl:          VNICClientIoctl
};

static int
VNICClientStart(unsigned long arg)
{
  unsigned int               retryCnt   = 30;
  DECLARE_WAIT_QUEUE_HEAD(wq);
  init_waitqueue_head(&wq);
      
  printk("\nretry count ----- : %d\n", retryCnt);
  while (retryCnt) {
    --retryCnt;
  printk("\nretry count : %d\n", retryCnt);

   if (!retryCnt) {
     return -1; 
   } 

   /* wait for small */
   printk("\n++++before sleep+++\n");
   interruptible_sleep_on_timeout(&wq, 2); 
   printk("\n++++after sleep+++\n");
  } /* end while (retryCnt)*/
  return 0; /* for success */
} /* end VNICClientStart() */

static int
VNICClientIoctl(struct inode *inode, struct file *file,
              unsigned int cmd, unsigned long arg)
{
  
  switch (cmd) {
    //case VNIC_CLIENT_START:
    case 0:
      return VNICClientStart(arg);
      break;
    default :
      return 0 ;
      break;
  } /* End of switch */

  return 0; /* VNIC_IOCTL_SUCCESS */
}

int __init
VNICClientModuleInit(void)
{
  /* register the character device */
  sClientMajorNum = register_chrdev(0, "VNICClient", &VNICFops);
  if (sClientMajorNum < 0) {
    return -EIO;
  }
  return 0;
}

void 
VNICClientModuleCleanUp(void)
{
  /* unRegiter the character device(); */
  unregister_chrdev(sClientMajorNum, "VNICClient");
}

module_init(VNICClientModuleInit);
module_exit(VNICClientModuleCleanUp);

#ifdef MODULE_LICENSE
  MODULE_LICENSE("GPL"); 
#endif /* MODULE_LICENSE */