3 * Linux ethernet bridge
6 * Lennert Buytenhek <buytenh@gnu.org>
8 * $Id: br_device.c,v 1.6 2001/12/24 00:59:55 davem Exp $
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 #include <linux/kernel.h>
17 #include <linux/netdevice.h>
18 #include <linux/etherdevice.h>
20 #include <asm/uaccess.h>
21 #include "br_private.h"
23 static struct net_device_stats *br_dev_get_stats(struct net_device *dev)
25 struct net_bridge *br = netdev_priv(dev);
26 return &br->statistics;
29 int br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
31 struct net_bridge *br = netdev_priv(dev);
32 const unsigned char *dest = skb->data;
33 struct net_bridge_fdb_entry *dst;
35 br->statistics.tx_packets++;
36 br->statistics.tx_bytes += skb->len;
38 skb->mac.raw = skb->data;
39 skb_pull(skb, ETH_HLEN);
43 br_flood_deliver(br, skb, 0);
44 else if ((dst = __br_fdb_get(br, dest)) != NULL)
45 br_deliver(dst->dst, skb);
47 br_flood_deliver(br, skb, 0);
53 static int br_dev_open(struct net_device *dev)
55 struct net_bridge *br = netdev_priv(dev);
57 br_features_recompute(br);
58 netif_start_queue(dev);
59 br_stp_enable_bridge(br);
64 static void br_dev_set_multicast_list(struct net_device *dev)
68 static int br_dev_stop(struct net_device *dev)
70 br_stp_disable_bridge(netdev_priv(dev));
72 netif_stop_queue(dev);
77 static int br_change_mtu(struct net_device *dev, int new_mtu)
79 if (new_mtu < 68 || new_mtu > br_min_mtu(netdev_priv(dev)))
86 /* Allow setting mac address of pseudo-bridge to be same as
87 * any of the bound interfaces
89 static int br_set_mac_address(struct net_device *dev, void *p)
91 struct net_bridge *br = netdev_priv(dev);
92 struct sockaddr *addr = p;
93 struct net_bridge_port *port;
94 int err = -EADDRNOTAVAIL;
96 spin_lock_bh(&br->lock);
97 list_for_each_entry(port, &br->port_list, list) {
98 if (!compare_ether_addr(port->dev->dev_addr, addr->sa_data)) {
99 br_stp_change_bridge_id(br, addr->sa_data);
104 spin_unlock_bh(&br->lock);
109 void br_dev_setup(struct net_device *dev)
111 memset(dev->dev_addr, 0, ETH_ALEN);
115 dev->do_ioctl = br_dev_ioctl;
116 dev->get_stats = br_dev_get_stats;
117 dev->hard_start_xmit = br_dev_xmit;
118 dev->open = br_dev_open;
119 dev->set_multicast_list = br_dev_set_multicast_list;
120 dev->change_mtu = br_change_mtu;
121 dev->destructor = free_netdev;
122 SET_MODULE_OWNER(dev);
123 dev->stop = br_dev_stop;
124 dev->tx_queue_len = 0;
125 dev->set_mac_address = br_set_mac_address;
126 dev->priv_flags = IFF_EBRIDGE;