patch-2.3.21 linux/drivers/net/lapbether.c

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diff -u --recursive --new-file v2.3.20/linux/drivers/net/lapbether.c linux/drivers/net/lapbether.c
@@ -1,571 +0,0 @@
-/*
- *	"LAPB via ethernet" driver release 001
- *
- *	This code REQUIRES 2.1.15 or higher/ NET3.038
- *
- *	This module:
- *		This module is free software; you can redistribute it and/or
- *		modify it under the terms of the GNU General Public License
- *		as published by the Free Software Foundation; either version
- *		2 of the License, or (at your option) any later version.
- *
- *	This is a "pseudo" network driver to allow LAPB over Ethernet.
- *
- *	This driver can use any ethernet destination address, and can be 
- *	limited to accept frames from one dedicated ethernet card only.
- *
- *	History
- *	LAPBETH 001	Jonathan Naylor		Cloned from bpqether.c
- */
-
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/net.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <asm/segment.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/notifier.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/netfilter.h>
-#include <linux/module.h>
-#include <linux/lapb.h>
-#include <linux/init.h>
-
-static char bcast_addr[6]={0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
-
-static int lapbeth_rcv(struct sk_buff *, struct net_device *, struct packet_type *);
-static int lapbeth_device_event(struct notifier_block *, unsigned long, void *);
-
-static struct packet_type lapbeth_packet_type = {
-	0,		/* ntohs(ETH_P_DEC),*/
-	0,		/* copy */
-	lapbeth_rcv,
-	NULL,
-	NULL,
-};
-
-static struct notifier_block lapbeth_dev_notifier = {
-	lapbeth_device_event,
-	0
-};
-
-
-#define MAXLAPBDEV 100
-
-static struct lapbethdev {
-	struct lapbethdev *next;
-	char   ethname[14];		/* ether device name */
-	struct net_device *ethdev;		/* link to ethernet device */
-	struct net_device axdev;		/* lapbeth device (lapb#) */
-	struct net_device_stats stats;	/* some statistics */
-} *lapbeth_devices = NULL;
-
-
-/* ------------------------------------------------------------------------ */
-
-
-/*
- *	Get the ethernet device for a LAPB device
- */
-static __inline__ struct net_device *lapbeth_get_ether_dev(struct net_device *dev)
-{
-	struct lapbethdev *lapbeth;
-	
-	lapbeth = (struct lapbethdev *)dev->priv;
-
-	return (lapbeth != NULL) ? lapbeth->ethdev : NULL;
-}
-
-/*
- *	Get the LAPB device for the ethernet device
- */
-static __inline__ struct net_device *lapbeth_get_x25_dev(struct net_device *dev)
-{
-	struct lapbethdev *lapbeth;
-
-	for (lapbeth = lapbeth_devices; lapbeth != NULL; lapbeth = lapbeth->next)
-		if (lapbeth->ethdev == dev)
-			return &lapbeth->axdev;
-
-	return NULL;
-}
-
-static __inline__ int dev_is_ethdev(struct net_device *dev)
-{
-	return (
-			dev->type == ARPHRD_ETHER
-			&& strncmp(dev->name, "dummy", 5)
-	);
-}
-
-/*
- *	Sanity check: remove all devices that ceased to exists and
- *	return '1' if the given LAPB device was affected.
- */
-static int lapbeth_check_devices(struct net_device *dev)
-{
-	struct lapbethdev *lapbeth, *lapbeth_prev;
-	int result = 0;
-	unsigned long flags;
-	
-	save_flags(flags);
-	cli();
-
-	lapbeth_prev = NULL;
-
-	for (lapbeth = lapbeth_devices; lapbeth != NULL; lapbeth = lapbeth->next) {
-		if (!dev_get(lapbeth->ethname)) {
-			if (lapbeth_prev)
-				lapbeth_prev->next = lapbeth->next;
-			else
-				lapbeth_devices = lapbeth->next;
-				
-			if (&lapbeth->axdev == dev)
-				result = 1;
-
-			unregister_netdev(&lapbeth->axdev);
-			kfree(lapbeth);
-		}
-
-		lapbeth_prev = lapbeth;
-	}
-	
-	restore_flags(flags);
-	
-	return result;
-}
-
-
-/* ------------------------------------------------------------------------ */
-
-
-/*
- *	Receive a LAPB frame via an ethernet interface.
- */
-static int lapbeth_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *ptype)
-{
-	int len, err;
-	struct lapbethdev *lapbeth;
-
-	skb->sk = NULL;		/* Initially we don't know who it's for */
-	
-	dev = lapbeth_get_x25_dev(dev);
-
-	if (dev == NULL || dev->start == 0) {
-		kfree_skb(skb);
-		return 0;
-	}
-
-	lapbeth = (struct lapbethdev *)dev->priv;
-
-	lapbeth->stats.rx_packets++;
-
-	len = skb->data[0] + skb->data[1] * 256;
-
-	skb_pull(skb, 2);	/* Remove the length bytes */
-	skb_trim(skb, len);	/* Set the length of the data */
-
-	if ((err = lapb_data_received(lapbeth, skb)) != LAPB_OK) {
-		kfree_skb(skb);
-		printk(KERN_DEBUG "lapbether: lapb_data_received err - %d\n", err);
-	}
-
-	return 0;
-}
-
-static void lapbeth_data_indication(void *token, struct sk_buff *skb)
-{
-	struct lapbethdev *lapbeth = (struct lapbethdev *)token;
-	unsigned char *ptr;
-
-	ptr  = skb_push(skb, 1);
-	*ptr = 0x00;
-
-	skb->dev      = &lapbeth->axdev;
-	skb->protocol = htons(ETH_P_X25);
-	skb->mac.raw  = skb->data;
-	skb->pkt_type = PACKET_HOST;
-
-	netif_rx(skb);
-}
-
-/*
- * 	Send a LAPB frame via an ethernet interface
- */
-static int lapbeth_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct lapbethdev *lapbeth;
-	int err;
-	
-	lapbeth = (struct lapbethdev *)dev->priv;
-
-	/*
-	 * Just to be *really* sure not to send anything if the interface
-	 * is down, the ethernet device may have gone.
-	 */
-	if (!dev->start) {
-		lapbeth_check_devices(dev);
-		kfree_skb(skb);
-		return -ENODEV;
-	}
-
-	switch (skb->data[0]) {
-		case 0x00:
-			break;
-		case 0x01:
-			if ((err = lapb_connect_request(lapbeth)) != LAPB_OK)
-				printk(KERN_ERR "lapbeth: lapb_connect_request error - %d\n", err);
-			kfree_skb(skb);
-			return 0;
-		case 0x02:
-			if ((err = lapb_disconnect_request(lapbeth)) != LAPB_OK)
-				printk(KERN_ERR "lapbeth: lapb_disconnect_request err - %d\n", err);
-			kfree_skb(skb);
-			return 0;
-		default:
-			kfree_skb(skb);
-			return 0;
-	}
-
-	skb_pull(skb, 1);
-
-	if ((err = lapb_data_request(lapbeth, skb)) != LAPB_OK) {
-		printk(KERN_ERR "lapbeth: lapb_data_request error - %d\n", err);
-		kfree_skb(skb);
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-	
-static void lapbeth_data_transmit(void *token, struct sk_buff *skb)
-{
-	struct lapbethdev *lapbeth = (struct lapbethdev *)token;
-	unsigned char *ptr;
-	struct net_device *dev;
-	int size;
-
-	skb->protocol = htons(ETH_P_X25);
-
-	size = skb->len;
-
-	ptr = skb_push(skb, 2);
-
-	*ptr++ = size % 256;
-	*ptr++ = size / 256;
-
-	lapbeth->stats.tx_packets++;
-
-	skb->dev = dev = lapbeth->ethdev;
-
-	dev->hard_header(skb, dev, ETH_P_DEC, bcast_addr, NULL, 0);
-
-	dev_queue_xmit(skb);
-}
-
-static void lapbeth_connected(void *token, int reason)
-{
-	struct lapbethdev *lapbeth = (struct lapbethdev *)token;
-	struct sk_buff *skb;
-	unsigned char *ptr;
-
-	if ((skb = dev_alloc_skb(1)) == NULL) {
-		printk(KERN_ERR "lapbeth: out of memory\n");
-		return;
-	}
-
-	ptr  = skb_put(skb, 1);
-	*ptr = 0x01;
-
-	skb->dev      = &lapbeth->axdev;
-	skb->protocol = htons(ETH_P_X25);
-	skb->mac.raw  = skb->data;
-	skb->pkt_type = PACKET_HOST;
-
-	netif_rx(skb);
-}
-
-static void lapbeth_disconnected(void *token, int reason)
-{
-	struct lapbethdev *lapbeth = (struct lapbethdev *)token;
-	struct sk_buff *skb;
-	unsigned char *ptr;
-
-	if ((skb = dev_alloc_skb(1)) == NULL) {
-		printk(KERN_ERR "lapbeth: out of memory\n");
-		return;
-	}
-
-	ptr  = skb_put(skb, 1);
-	*ptr = 0x02;
-
-	skb->dev      = &lapbeth->axdev;
-	skb->protocol = htons(ETH_P_X25);
-	skb->mac.raw  = skb->data;
-	skb->pkt_type = PACKET_HOST;
-
-	netif_rx(skb);
-}
-
-/*
- *	Statistics
- */
-static struct net_device_stats *lapbeth_get_stats(struct net_device *dev)
-{
-	struct lapbethdev *lapbeth;
-
-	lapbeth = (struct lapbethdev *)dev->priv;
-
-	return &lapbeth->stats;
-}
-
-/*
- *	Set AX.25 callsign
- */
-static int lapbeth_set_mac_address(struct net_device *dev, void *addr)
-{
-    struct sockaddr *sa = (struct sockaddr *)addr;
-
-    memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
-
-    return 0;
-}
-
-static int lapbeth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
-{
-	return -EINVAL;
-}
-
-/*
- * open/close a device
- */
-static int lapbeth_open(struct net_device *dev)
-{
-	struct lapb_register_struct lapbeth_callbacks;
-	struct lapbethdev *lapbeth;
-	int err;
-
-	if (lapbeth_check_devices(dev))
-		return -ENODEV;		/* oops, it's gone */
-	
-	dev->tbusy = 0;
-	dev->start = 1;
-
-	lapbeth = (struct lapbethdev *)dev->priv;
-
-	lapbeth_callbacks.connect_confirmation    = lapbeth_connected;
-	lapbeth_callbacks.connect_indication      = lapbeth_connected;
-	lapbeth_callbacks.disconnect_confirmation = lapbeth_disconnected;
-	lapbeth_callbacks.disconnect_indication   = lapbeth_disconnected;
-	lapbeth_callbacks.data_indication         = lapbeth_data_indication;
-	lapbeth_callbacks.data_transmit           = lapbeth_data_transmit;
-
-	if ((err = lapb_register(lapbeth, &lapbeth_callbacks)) != LAPB_OK) {
-		printk(KERN_ERR "lapbeth: lapb_register error - %d\n", err);
-		dev->tbusy = 1;
-		dev->start = 0;
-		return -ENODEV;
-	}
-
-	MOD_INC_USE_COUNT;
-
-	return 0;
-}
-
-static int lapbeth_close(struct net_device *dev)
-{
-	struct lapbethdev *lapbeth;
-	int err;
-
-	dev->tbusy = 1;
-	dev->start = 0;
-
-	lapbeth = (struct lapbethdev *)dev->priv;
-
-	if ((err = lapb_unregister(lapbeth)) != LAPB_OK)
-		printk(KERN_ERR "lapbeth: lapb_unregister error - %d\n", err);
-
-	MOD_DEC_USE_COUNT;
-
-	return 0;
-}
-
-static int lapbeth_dev_init(struct net_device *dev)
-{
-	return 0;
-}
-
-/* ------------------------------------------------------------------------ */
-
-/*
- *	Setup a new device.
- */
-static int lapbeth_new_device(struct net_device *dev)
-{
-	int k;
-	unsigned char *buf;
-	struct lapbethdev *lapbeth, *lapbeth2;
-	
-	if ((lapbeth = kmalloc(sizeof(struct lapbethdev), GFP_KERNEL)) == NULL)
-		return -ENOMEM;
-		
-	memset(lapbeth, 0, sizeof(struct lapbethdev));
-	
-	lapbeth->ethdev = dev;
-
-	lapbeth->ethname[sizeof(lapbeth->ethname)-1] = '\0';
-	strncpy(lapbeth->ethname, dev->name, sizeof(lapbeth->ethname)-1);
-
-	dev = &lapbeth->axdev;
-	buf = kmalloc(14, GFP_KERNEL);
-
-	for (k = 0; k < MAXLAPBDEV; k++) {
-		struct net_device *odev;
-
-		sprintf(buf, "lapb%d", k);
-
-		if ((odev = __dev_get_by_name(buf)) == NULL || lapbeth_check_devices(odev))
-			break;
-	}
-
-	if (k == MAXLAPBDEV) {
-		kfree(lapbeth);
-		return -ENODEV;
-	}
-	
-	dev->priv = (void *)lapbeth;	/* pointer back */
-	dev->name = buf;
-	dev->init = lapbeth_dev_init;
-
-	if (register_netdev(dev) != 0) {
-		kfree(lapbeth);
-                return -EIO;
-        }
-
-	dev_init_buffers(dev);
-
-	dev->hard_start_xmit = lapbeth_xmit;
-	dev->open	     = lapbeth_open;
-	dev->stop	     = lapbeth_close;
-	dev->set_mac_address = lapbeth_set_mac_address;
-	dev->get_stats	     = lapbeth_get_stats;
-	dev->do_ioctl	     = lapbeth_ioctl;
-
-	dev->flags      = 0;
-
-	dev->type            = ARPHRD_X25;
-	dev->hard_header_len = 3;
-	dev->mtu             = 1000;
-	dev->addr_len        = 0;
-
-	cli();
-
-	if (lapbeth_devices == NULL) {
-		lapbeth_devices = lapbeth;
-	} else {
-		for (lapbeth2 = lapbeth_devices; lapbeth2->next != NULL; lapbeth2 = lapbeth2->next);
-		lapbeth2->next = lapbeth;
-	}
-	
-	sti();
-
-	return 0;
-}
-
-
-/*
- *	Handle device status changes.
- */
-static int lapbeth_device_event(struct notifier_block *this,unsigned long event, void *ptr)
-{
-	struct net_device *dev = (struct net_device *)ptr;
-	
-	if (!dev_is_ethdev(dev))
-		return NOTIFY_DONE;
-
-	lapbeth_check_devices(NULL);
-
-	switch (event) {
-		case NETDEV_UP:		/* new ethernet device -> new LAPB interface */
-			if (lapbeth_get_x25_dev(dev) == NULL)
-				lapbeth_new_device(dev);
-			break;
-
-		case NETDEV_DOWN:	/* ethernet device closed -> close LAPB interface */
-			if ((dev = lapbeth_get_x25_dev(dev)) != NULL)
-				dev_close(dev);
-			break;
-
-		default:
-			break;
-	}
-
-	return NOTIFY_DONE;
-}
-
-
-/* ------------------------------------------------------------------------ */
-
-/*
- * Initialize driver. To be called from af_ax25 if not compiled as a
- * module
- */
-int lapbeth_init(void)
-{
-	struct net_device *dev;
-
-	lapbeth_packet_type.type  = htons(ETH_P_DEC);
-	dev_add_pack(&lapbeth_packet_type);
-
-	register_netdevice_notifier(&lapbeth_dev_notifier);
-
-	printk(KERN_INFO "LAPB Ethernet driver version 0.01\n");
-
-	read_lock_bh(&dev_base_lock);
-	for (dev = dev_base; dev != NULL; dev = dev->next) {
-		if (dev_is_ethdev(dev)) {
-			read_unlock_bh(&dev_base_lock);
-			lapbeth_new_device(dev);
-			read_lock_bh(&dev_base_lock);
-		}
-	}
-	read_unlock_bh(&dev_base_lock);
-
-	return 0;
-}
-
-#ifdef MODULE
-EXPORT_NO_SYMBOLS;
-
-MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>");
-MODULE_DESCRIPTION("The unofficial LAPB over Ethernet driver");
-
-int init_module(void)
-{
-	return lapbeth_init();
-}
-
-void cleanup_module(void)
-{
-	struct lapbethdev *lapbeth;
-
-	dev_remove_pack(&lapbeth_packet_type);
-
-	unregister_netdevice_notifier(&lapbeth_dev_notifier);
-
-	for (lapbeth = lapbeth_devices; lapbeth != NULL; lapbeth = lapbeth->next)
-		unregister_netdev(&lapbeth->axdev);
-}
-#endif
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