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;
}
void br_fdb_cleanup(struct net_bridge *br)
{
int i;
unsigned long timeout;
timeout = __timeout(br);
write_lock_bh(&br->hash_lock);
for (i=0;i<BR_HASH_SIZE;i++) {
struct net_bridge_fdb_entry *f;
f = br->hash[i];
while (f != NULL) {
struct net_bridge_fdb_entry *g;
g = f->next_hash;
if (!f->is_static &&
time_before_eq(f->ageing_timer, timeout)) {
__hash_unlink(f);
br_fdb_put(f);
}
f = g;
}
}
write_unlock_bh(&br->hash_lock);
}
void br_fdb_delete_by_port(struct net_bridge *br, struct net_bridge_port *p)
{
int i;
write_lock_bh(&br->hash_lock);
for (i=0;i<BR_HASH_SIZE;i++) {
struct net_bridge_fdb_entry *f;
f = br->hash[i];
while (f != NULL) {
struct net_bridge_fdb_entry *g;
g = f->next_hash;
if (f->dst == p) {
__hash_unlink(f);
br_fdb_put(f);
}
f = g;
}
}
write_unlock_bh(&br->hash_lock);
}
static int br_handle_frame_finish(struct sk_buff *skb)
{
struct net_bridge *br;
unsigned char *dest;
struct net_bridge_fdb_entry *dst;
struct net_bridge_port *p;
int passedup;
dest = skb->mac.ethernet->h_dest;
p = skb->dev->br_port;
if (p == NULL)
goto err_nolock;
br = p->br;
read_lock(&br->lock);
if (skb->dev->br_port == NULL)
goto err;
passedup = 0;
if (br->dev.flags & IFF_PROMISC) {
struct sk_buff *skb2;
skb2 = skb_clone(skb, GFP_ATOMIC);
if (skb2 != NULL) {
passedup = 1;
br_pass_frame_up(br, skb2);
}
}
if (dest[0] & 1) {
br_flood_forward(br, skb, !passedup);
if (!passedup)
br_pass_frame_up(br, skb);
goto out;
}
dst = br_fdb_get(br, dest);
if (dst != NULL && dst->is_local) {
if (!passedup)
br_pass_frame_up(br, skb);
else
kfree_skb(skb);
br_fdb_put(dst);
goto out;
}
if (dst != NULL) {
br_forward(dst->dst, skb);
br_fdb_put(dst);
goto out;
}
br_flood_forward(br, skb, 0);
out:
read_unlock(&br->lock);
return 0;
err:
read_unlock(&br->lock);
err_nolock:
kfree_skb(skb);
return 0;
}
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;
#ifdef IGMP_SNOOPING
struct iphdr *iph;
unsigned int ipaddr=0;
unsigned char proto=0;
//unsigned char reserved=0;
extern int igmpsnoopenabled;
iph = skb->nh.iph;
ipaddr = iph->daddr;
proto = iph->protocol;
//Brad disable 20080619
// if ((ipaddr&0xF0FFFF00) == 0xE0000000)
// reserved=1;
#endif
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) {
#ifdef IGMP_SNOOPING
if(igmpsnoopenabled &&
(MULTICAST_MAC(dest) || IPV6_MULTICAST_MAC(dest))&&
(proto != IPPROTO_IGMP) && (ipaddr != 0xEFFFFFFA)
//&& (reserved == 0)
) {
if ((dst = br_fdb_get(br, dest)) != NULL) {
br_multicast_deliver(br, dst, skb, 0);
br_fdb_put(dst);
}
else {
br_flood_deliver(br, skb, 0);
}
}
else { // broadcast
br_flood_deliver(br, skb, 0);
}
return 0;
#else
br_flood_deliver(br, skb, 0);
return 0;
#endif
}
if ((dst = br_fdb_get(br, dest)) != NULL) {
#ifdef NAT_SPEEDUP
if (skb->dst && skb->dst->hh && skb->dst->hh->fdb_cache==NULL) {
skb->dst->hh->fdb_cache = (void*)dst;
dst->hh_ptr = skb->dst->hh;
}
#endif
br_deliver(dst->dst, skb);
br_fdb_put(dst);
return 0;
}
br_flood_deliver(br, skb, 0);
return 0;
}
int br_fdb_get_entries(struct net_bridge *br,
unsigned char *_buf,
int maxnum,
int offset)
{
int i;
int num;
struct __fdb_entry *walk;
num = 0;
walk = (struct __fdb_entry *)_buf;
read_lock_bh(&br->hash_lock);
for (i=0;i<BR_HASH_SIZE;i++) {
struct net_bridge_fdb_entry *f;
f = br->hash[i];
while (f != NULL && num < maxnum) {
struct __fdb_entry ent;
int err;
struct net_bridge_fdb_entry *g;
struct net_bridge_fdb_entry **pp;
if (has_expired(br, f)) {
f = f->next_hash;
continue;
}
if (offset) {
offset--;
f = f->next_hash;
continue;
}
copy_fdb(&ent, f);
atomic_inc(&f->use_count);
read_unlock_bh(&br->hash_lock);
err = copy_to_user(walk, &ent, sizeof(struct __fdb_entry));
read_lock_bh(&br->hash_lock);
g = f->next_hash;
pp = f->pprev_hash;
br_fdb_put(f);
if (err)
goto out_fault;
if (g == NULL && pp == NULL)
goto out_disappeared;
num++;
walk++;
f = g;
}
}
out:
read_unlock_bh(&br->hash_lock);
return num;
out_disappeared:
num = -EAGAIN;
goto out;
out_fault:
num = -EFAULT;
goto out;
}