Viewing file:  br_device.c (2.72 KB) -rw-r--r--
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/*
* Device handling code
* Linux ethernet bridge
*
* Authors:
* Lennert Buytenhek <buytenh@gnu.org>
*
* $Id: br_device.c,v 1.5.2.1 2001/12/24 00:59:27 davem Exp $
*
* This program 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.
*/
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/if_bridge.h>
#include <asm/uaccess.h>
#include "br_private.h"
static int br_dev_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
unsigned long args[4];
unsigned long *data;
if (cmd != SIOCDEVPRIVATE)
return -EOPNOTSUPP;
data = (unsigned long *)rq->ifr_data;
if (copy_from_user(args, data, 4*sizeof(unsigned long)))
return -EFAULT;
return br_ioctl(dev->priv, args[0], args[1], args[2], args[3]);
}
static struct net_device_stats *br_dev_get_stats(struct net_device *dev)
{
struct net_bridge *br;
br = dev->priv;
return &br->statistics;
}
static int __br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct net_bridge *br;
unsigned char *dest;
struct net_bridge_fdb_entry *dst;
br = dev->priv;
br->statistics.tx_packets++;
br->statistics.tx_bytes += skb->len;
dest = skb->mac.raw = skb->data;
skb_pull(skb, ETH_HLEN);
if (dest[0] & 1) {
br_flood_deliver(br, skb, 0);
return 0;
}
if ((dst = br_fdb_get(br, dest)) != NULL) {
br_deliver(dst->dst, skb);
br_fdb_put(dst);
return 0;
}
br_flood_deliver(br, skb, 0);
return 0;
}
int br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct net_bridge *br;
int ret;
br = dev->priv;
read_lock(&br->lock);
ret = __br_dev_xmit(skb, dev);
read_unlock(&br->lock);
return ret;
}
static int br_dev_open(struct net_device *dev)
{
struct net_bridge *br;
netif_start_queue(dev);
br = dev->priv;
read_lock(&br->lock);
br_stp_enable_bridge(br);
read_unlock(&br->lock);
return 0;
}
static void br_dev_set_multicast_list(struct net_device *dev)
{
}
static int br_dev_stop(struct net_device *dev)
{
struct net_bridge *br;
br = dev->priv;
read_lock(&br->lock);
br_stp_disable_bridge(br);
read_unlock(&br->lock);
netif_stop_queue(dev);
return 0;
}
static int br_dev_accept_fastpath(struct net_device *dev, struct dst_entry *dst)
{
return -1;
}
void br_dev_setup(struct net_device *dev)
{
memset(dev->dev_addr, 0, ETH_ALEN);
dev->do_ioctl = br_dev_do_ioctl;
dev->get_stats = br_dev_get_stats;
dev->hard_start_xmit = br_dev_xmit;
dev->open = br_dev_open;
dev->set_multicast_list = br_dev_set_multicast_list;
dev->stop = br_dev_stop;
dev->accept_fastpath = br_dev_accept_fastpath;
dev->tx_queue_len = 0;
dev->set_mac_address = NULL;
}
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