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/*
* Device handling code
* Linux ethernet bridge
*
* Authors:
* Lennert Buytenhek <buytenh@gnu.org>
*
* $Id: br_device.c,v 1.6 2001/12/24 00:59:55 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/etherdevice.h>
#include <asm/uaccess.h>
#include "br_private.h"
static struct net_device_stats *br_dev_get_stats(struct net_device *dev)
{
struct net_bridge *br = netdev_priv(dev);
return &br->statistics;
}
int br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct net_bridge *br = netdev_priv(dev);
const unsigned char *dest = skb->data;
struct net_bridge_fdb_entry *dst;
br->statistics.tx_packets++;
br->statistics.tx_bytes += skb->len;
skb->mac.raw = skb->data;
skb_pull(skb, ETH_HLEN);
rcu_read_lock();
if (dest[0] & 1)
br_flood_deliver(br, skb, 0);
else if ((dst = __br_fdb_get(br, dest)) != NULL)
br_deliver(dst->dst, skb);
else
br_flood_deliver(br, skb, 0);
rcu_read_unlock();
return 0;
}
static int br_dev_open(struct net_device *dev)
{
struct net_bridge *br = netdev_priv(dev);
br_features_recompute(br);
netif_start_queue(dev);
br_stp_enable_bridge(br);
return 0;
}
static void br_dev_set_multicast_list(struct net_device *dev)
{
}
static int br_dev_stop(struct net_device *dev)
{
br_stp_disable_bridge(netdev_priv(dev));
netif_stop_queue(dev);
return 0;
}
static int br_change_mtu(struct net_device *dev, int new_mtu)
{
if (new_mtu < 68 || new_mtu > br_min_mtu(netdev_priv(dev)))
return -EINVAL;
dev->mtu = new_mtu;
return 0;
}
/* Allow setting mac address of pseudo-bridge to be same as
* any of the bound interfaces
*/
static int br_set_mac_address(struct net_device *dev, void *p)
{
struct net_bridge *br = netdev_priv(dev);
struct sockaddr *addr = p;
struct net_bridge_port *port;
int err = -EADDRNOTAVAIL;
spin_lock_bh(&br->lock);
list_for_each_entry(port, &br->port_list, list) {
if (!compare_ether_addr(port->dev->dev_addr, addr->sa_data)) {
br_stp_change_bridge_id(br, addr->sa_data);
err = 0;
break;
}
}
spin_unlock_bh(&br->lock);
return err;
}
void br_dev_setup(struct net_device *dev)
{
memset(dev->dev_addr, 0, ETH_ALEN);
ether_setup(dev);
dev->do_ioctl = br_dev_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->change_mtu = br_change_mtu;
dev->destructor = free_netdev;
SET_MODULE_OWNER(dev);
dev->stop = br_dev_stop;
dev->tx_queue_len = 0;
dev->set_mac_address = br_set_mac_address;
dev->priv_flags = IFF_EBRIDGE;
}
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