| /* |
| * 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/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; |
| } |