/* net device transmit always called with no BH (preempt_disabled) */
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;
#if defined(CONFIG_MIPS_BRCM) && defined(CONFIG_BLOG)
blog_dev( skb, dev, DIR_TX, skb->len );
#endif
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
skb_reset_mac_header(skb);
skb_pull(skb, ETH_HLEN);
#if defined(CONFIG_MIPS_BRCM) && defined(CONFIG_BR_MLD_SNOOP)
if ((0x33 == dest[0]) && (0x33 == dest[1])) {
if (!br_mld_mc_forward(br, skb, 0, 0))
br_flood_deliver(br, skb);
}
else
#endif
if (dest[0] & 1) {
#if defined(CONFIG_MIPS_BRCM) && defined(CONFIG_BR_IGMP_SNOOP)
if (!br_igmp_mc_forward(br, skb, 0, 0))
#endif
br_flood_deliver(br, skb);
}
else if ((dst = __br_fdb_get(br, dest)) != NULL)
br_deliver(dst->dst, skb);
else
br_flood_deliver(br, skb);
return 0;
}
/* note: already called with rcu_read_lock (preempt_disabled) */
int br_handle_frame_finish(struct sk_buff *skb)
{
const unsigned char *dest = eth_hdr(skb)->h_dest;
struct net_bridge_port *p = rcu_dereference(skb->dev->br_port);
struct net_bridge *br;
struct net_bridge_fdb_entry *dst;
struct sk_buff *skb2;
if (!p || p->state == BR_STATE_DISABLED)
goto drop;
/* insert into forwarding database after filtering to avoid spoofing */
br = p->br;
br_fdb_update(br, p, eth_hdr(skb)->h_source);
if (p->state == BR_STATE_LEARNING)
goto drop;
/* The packet skb2 goes to the local host (NULL to skip). */
skb2 = NULL;
if (br->dev->flags & IFF_PROMISC)
skb2 = skb;
dst = NULL;
#if defined(CONFIG_MIPS_BRCM) && defined(CONFIG_BR_MLD_SNOOP)
if((0x33 == dest[0]) && (0x33 == dest[1])) {
br->statistics.multicast++;
skb2 = skb;
if (br_mld_mc_forward(br, skb, 1, 0))
{
skb = NULL;
}
} else
#endif
if (is_multicast_ether_addr(dest)) {
br->dev->stats.multicast++;
skb2 = skb;
#if defined(CONFIG_MIPS_BRCM) && defined(CONFIG_BR_IGMP_SNOOP)
if (br_igmp_mc_forward(br, skb, 1, 0))
{
skb = NULL;
}
#endif
} else
{
dst = __br_fdb_get(br, dest);
#if defined(CONFIG_MIPS_BRCM) && defined(CONFIG_BLOG)
blog_br_fdb(skb, __br_fdb_get(br, eth_hdr(skb)->h_source), dst);
#endif
if ((dst != NULL) && dst->is_local)
{
skb2 = skb;
/* Do not forward the packet since it's local. */
skb = NULL;
}
}
if (skb2 == skb)
skb2 = skb_clone(skb, GFP_ATOMIC);
if (skb2)
br_pass_frame_up(br, skb2);
if (skb) {
if (dst)
br_forward(dst->dst, skb);
else
br_flood_forward(br, skb);
}
out:
return 0;
drop:
kfree_skb(skb);
goto out;
}
