/* * Device handling code * Linux ethernet bridge * * Authors: * Lennert Buytenhek * * $Id: br_device.c,v 1.5.2.1 2001/12/24 00:59:27 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 #include #include #include #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; }