/* * 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/module.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; } 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 = NULL; dev->priv_flags = IFF_EBRIDGE; }