/*

   * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)

   * Licensed under the GPL.
   */
  
  #include "linux/init.h"

  #include <linux/netdevice.h>

  #include "net_kern.h"

  #include "pcap_user.h"
  
  struct pcap_init {
  	char *host_if;
  	int promisc;
  	int optimize;
  	char *filter;
  };
  
  void pcap_init(struct net_device *dev, void *data)
  {
  	struct uml_net_private *pri;
  	struct pcap_data *ppri;
  	struct pcap_init *init = data;

  	pri = netdev_priv(dev);

  	ppri = (struct pcap_data *) pri->user;
  	ppri->host_if = init->host_if;
  	ppri->promisc = init->promisc;
  	ppri->optimize = init->optimize;
  	ppri->filter = init->filter;

  
  	printk("pcap backend, host interface %s
  ", ppri->host_if);

  }

  static int pcap_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)

  {

  	return pcap_user_read(fd, skb_mac_header(skb),
  			      skb->dev->mtu + ETH_HEADER_OTHER,

  			      (struct pcap_data *) &lp->user);

  }

  static int pcap_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)

  {

  	return -EPERM;

  }

  static const struct net_kern_info pcap_kern_info = {

  	.init			= pcap_init,
  	.protocol		= eth_protocol,
  	.read			= pcap_read,
  	.write			= pcap_write,
  };
  
  int pcap_setup(char *str, char **mac_out, void *data)
  {
  	struct pcap_init *init = data;
  	char *remain, *host_if = NULL, *options[2] = { NULL, NULL };
  	int i;
  
  	*init = ((struct pcap_init)
  		{ .host_if 	= "eth0",
  		  .promisc 	= 1,
  		  .optimize 	= 0,
  		  .filter 	= NULL });

  	remain = split_if_spec(str, &host_if, &init->filter,

  			       &options[0], &options[1], mac_out, NULL);

  	if (remain != NULL) {

  		printk(KERN_ERR "pcap_setup - Extra garbage on "
  		       "specification : '%s'
  ", remain);

  		return 0;

  	}

  	if (host_if != NULL)

  		init->host_if = host_if;

  	for (i = 0; i < ARRAY_SIZE(options); i++) {
  		if (options[i] == NULL)

  			continue;

  		if (!strcmp(options[i], "promisc"))

  			init->promisc = 1;

  		else if (!strcmp(options[i], "nopromisc"))

  			init->promisc = 0;

  		else if (!strcmp(options[i], "optimize"))

  			init->optimize = 1;

  		else if (!strcmp(options[i], "nooptimize"))

  			init->optimize = 0;

  		else {

  			printk(KERN_ERR "pcap_setup : bad option - '%s'
  ",
  			       options[i]);

  			return 0;
  		}

  	}

  	return 1;

  }
  
  static struct transport pcap_transport = {
  	.list 		= LIST_HEAD_INIT(pcap_transport.list),
  	.name 		= "pcap",
  	.setup  	= pcap_setup,
  	.user 		= &pcap_user_info,
  	.kern 		= &pcap_kern_info,
  	.private_size 	= sizeof(struct pcap_data),
  	.setup_size 	= sizeof(struct pcap_init),
  };
  
  static int register_pcap(void)
  {
  	register_transport(&pcap_transport);

  	return 0;

  }

  late_initcall(register_pcap);