C++ (Cpp) br_mac_hash Examples

Example #1

void br_fdb_insert(struct net_bridge *br,
		   struct net_bridge_port *source,
		   unsigned char *addr,
		   int is_local)
{
	struct net_bridge_fdb_entry *fdb;
	int hash;

	hash = br_mac_hash(addr);

	write_lock_bh(&br->hash_lock);
	fdb = br->hash[hash];
	while (fdb != NULL) {
		if (!memcmp(fdb->addr.addr, addr, ETH_ALEN)) {
			/* attempt to update an entry for a local interface */
			if (fdb->is_local) {
				if (is_local) 
					printk(KERN_INFO "%s: attempt to add"
					       " interface with same source address.\n",
					       source->dev->name);
				else if (net_ratelimit()) 
					printk(KERN_WARNING "%s: received packet with "
					       " own address as source address\n",
					       source->dev->name);
				goto out;
			}

			__fdb_possibly_replace(fdb, source, is_local);
			goto out;
		}

		fdb = fdb->next_hash;
	}

	fdb = kmalloc(sizeof(*fdb), GFP_ATOMIC);
	if (fdb == NULL) 
		goto out;

	memcpy(fdb->addr.addr, addr, ETH_ALEN);
	atomic_set(&fdb->use_count, 1);
	fdb->dst = source;
	fdb->is_local = is_local;
	fdb->is_static = is_local;
	fdb->ageing_timer = jiffies;

	__hash_link(br, fdb, hash);

 out:
	write_unlock_bh(&br->hash_lock);
}

Example #2

File: br_fdb.c Project: jameshilliard/actiontec_opensrc_mi424wr-rev-ef_fw-20-19-8

void br_fdb_insert(struct net_bridge *br,
		   struct net_bridge_port *source,
		   unsigned char *addr,
		   int is_local)
{
	struct net_bridge_fdb_entry *fdb;
	int hash;

	hash = br_mac_hash(addr);

	write_lock_bh(&br->hash_lock);
	fdb = br->hash[hash];
	while (fdb != NULL) {
		if (!fdb->is_local &&
		    !memcmp(fdb->addr.addr, addr, ETH_ALEN)) {
			__fdb_possibly_replace(fdb, source, is_local);
			write_unlock_bh(&br->hash_lock);
			return;
		}

		fdb = fdb->next_hash;
	}

	fdb = kmalloc(sizeof(*fdb), GFP_ATOMIC);
	if (fdb == NULL) {
		write_unlock_bh(&br->hash_lock);
		return;
	}

	memcpy(fdb->addr.addr, addr, ETH_ALEN);
	atomic_set(&fdb->use_count, 1);
	fdb->dst = source;
	fdb->is_local = is_local;
	fdb->is_static = is_local;
	fdb->ageing_timer = jiffies;

	__hash_link(br, fdb, hash);

	write_unlock_bh(&br->hash_lock);
}

Example #3

void br_fdb_changeaddr(struct net_bridge_port *p, unsigned char *newaddr)
{
	struct net_bridge *br;
	int i;

	br = p->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) {
			if (f->dst == p && f->is_local) {
				__hash_unlink(f);
				memcpy(f->addr.addr, newaddr, ETH_ALEN);
				__hash_link(br, f, br_mac_hash(newaddr));
				write_unlock_bh(&br->hash_lock);
				return;
			}
			f = f->next_hash;
		}
	}
	write_unlock_bh(&br->hash_lock);
}

Example #4

struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br, unsigned char *addr)
{
	struct net_bridge_fdb_entry *fdb;

	read_lock_bh(&br->hash_lock);
	fdb = br->hash[br_mac_hash(addr)];
	while (fdb != NULL) {
		if (!memcmp(fdb->addr.addr, addr, ETH_ALEN)) {
			if (!has_expired(br, fdb)) {
				atomic_inc(&fdb->use_count);
				read_unlock_bh(&br->hash_lock);
				return fdb;
			}

			read_unlock_bh(&br->hash_lock);
			return NULL;
		}

		fdb = fdb->next_hash;
	}

	read_unlock_bh(&br->hash_lock);
	return NULL;
}