/*
* Confirm that local IP address exists using wildcards:
* - dev: only on this interface, 0=any interface
* - dst: only in the same subnet as dst, 0=any dst
* - local: address, 0=autoselect the local address
* - scope: maximum allowed scope value for the local address
*/
__be32 inet_confirm_addr(const struct net_device *dev, __be32 dst, __be32 local, int scope)
{
__be32 addr = 0;
struct in_device *in_dev;
if (dev) {
rcu_read_lock();
if ((in_dev = __in_dev_get_rcu(dev)))
addr = confirm_addr_indev(in_dev, dst, local, scope);
rcu_read_unlock();
return addr;
}
read_lock(&dev_base_lock);
rcu_read_lock();
for (dev = dev_base; dev; dev = dev->next) {
if ((in_dev = __in_dev_get_rcu(dev))) {
addr = confirm_addr_indev(in_dev, dst, local, scope);
if (addr)
break;
}
}
rcu_read_unlock();
read_unlock(&dev_base_lock);
return addr;
}
/*
* Confirm that local IP address exists using wildcards:
* - in_dev: only on this interface, 0=any interface
* - dst: only in the same subnet as dst, 0=any dst
* - local: address, 0=autoselect the local address
* - scope: maximum allowed scope value for the local address
*/
__be32 inet_confirm_addr(struct in_device *in_dev,
__be32 dst, __be32 local, int scope)
{
__be32 addr = 0;
struct net_device *dev;
struct net *net;
if (scope != RT_SCOPE_LINK)
return confirm_addr_indev(in_dev, dst, local, scope);
net = dev_net(in_dev->dev);
read_lock(&dev_base_lock);
rcu_read_lock();
for_each_netdev(net, dev) {
if ((in_dev = __in_dev_get_rcu(dev))) {
addr = confirm_addr_indev(in_dev, dst, local, scope);
if (addr)
break;
}
}
rcu_read_unlock();
read_unlock(&dev_base_lock);
return addr;
}
/*
* Confirm that local IP address exists using wildcards:
* - dev: only on this interface, 0=any interface
* - dst: only in the same subnet as dst, 0=any dst
* - local: address, 0=autoselect the local address
* - scope: maximum allowed scope value for the local address
*/
u32 inet_confirm_addr(const struct net_device *dev, u32 dst, u32 local, int scope)
{
u32 addr = 0;
struct in_device *in_dev;
if (dev) {
read_lock(&inetdev_lock);
if ((in_dev = __in_dev_get(dev))) {
read_lock(&in_dev->lock);
addr = confirm_addr_indev(in_dev, dst, local, scope);
read_unlock(&in_dev->lock);
}
read_unlock(&inetdev_lock);
return addr;
}
read_lock(&dev_base_lock);
read_lock(&inetdev_lock);
for (dev = dev_base; dev; dev = dev->next) {
if ((in_dev = __in_dev_get(dev))) {
read_lock(&in_dev->lock);
addr = confirm_addr_indev(in_dev, dst, local, scope);
read_unlock(&in_dev->lock);
if (addr)
break;
}
}
read_unlock(&inetdev_lock);
read_unlock(&dev_base_lock);
return addr;
}