104 строки
2.2 KiB
C
104 строки
2.2 KiB
C
/*
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* Device handling code
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* Linux ethernet bridge
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*
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* Authors:
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* Lennert Buytenhek <buytenh@gnu.org>
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*
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* $Id: br_device.c,v 1.6 2001/12/24 00:59:55 davem Exp $
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/module.h>
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#include <asm/uaccess.h>
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#include "br_private.h"
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static struct net_device_stats *br_dev_get_stats(struct net_device *dev)
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{
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struct net_bridge *br = netdev_priv(dev);
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return &br->statistics;
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}
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int br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct net_bridge *br = netdev_priv(dev);
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const unsigned char *dest = skb->data;
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struct net_bridge_fdb_entry *dst;
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br->statistics.tx_packets++;
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br->statistics.tx_bytes += skb->len;
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skb->mac.raw = skb->data;
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skb_pull(skb, ETH_HLEN);
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rcu_read_lock();
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if (dest[0] & 1)
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br_flood_deliver(br, skb, 0);
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else if ((dst = __br_fdb_get(br, dest)) != NULL)
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br_deliver(dst->dst, skb);
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else
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br_flood_deliver(br, skb, 0);
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rcu_read_unlock();
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return 0;
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}
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static int br_dev_open(struct net_device *dev)
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{
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struct net_bridge *br = netdev_priv(dev);
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br_features_recompute(br);
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netif_start_queue(dev);
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br_stp_enable_bridge(br);
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return 0;
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}
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static void br_dev_set_multicast_list(struct net_device *dev)
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{
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}
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static int br_dev_stop(struct net_device *dev)
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{
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br_stp_disable_bridge(netdev_priv(dev));
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netif_stop_queue(dev);
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return 0;
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}
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static int br_change_mtu(struct net_device *dev, int new_mtu)
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{
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if (new_mtu < 68 || new_mtu > br_min_mtu(netdev_priv(dev)))
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return -EINVAL;
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dev->mtu = new_mtu;
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return 0;
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}
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void br_dev_setup(struct net_device *dev)
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{
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memset(dev->dev_addr, 0, ETH_ALEN);
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ether_setup(dev);
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dev->do_ioctl = br_dev_ioctl;
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dev->get_stats = br_dev_get_stats;
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dev->hard_start_xmit = br_dev_xmit;
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dev->open = br_dev_open;
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dev->set_multicast_list = br_dev_set_multicast_list;
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dev->change_mtu = br_change_mtu;
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dev->destructor = free_netdev;
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SET_MODULE_OWNER(dev);
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dev->stop = br_dev_stop;
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dev->tx_queue_len = 0;
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dev->set_mac_address = NULL;
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dev->priv_flags = IFF_EBRIDGE;
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}
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