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[IPV4]: Add inet_dev_addr_type() 

Address type search can be limited to an interface by
inet_dev_addr_type function.

Signed-off-by: Laszlo Attila Toth <panther@balabit.hu>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Laszlo Attila Toth 2007-12-04 23:28:46 -08:00 committed by David S. Miller
parent 0265ab44ba
commit 0553811612
2 changed files with 20 additions and 2 deletions
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1
include/net/route.h
View File

@ -118,6 +118,7 @@ extern unsigned short ip_rt_frag_needed(struct iphdr *iph, unsigned short new_mt
extern void ip_rt_send_redirect(struct sk_buff *skb);
extern unsigned inet_addr_type(__be32 addr);
extern unsigned inet_dev_addr_type(const struct net_device *dev, __be32 addr);
extern void ip_rt_multicast_event(struct in_device *);
extern int ip_rt_ioctl(unsigned int cmd, void __user *arg);
extern void ip_rt_get_source(u8 *src, struct rtable *rt);

21
net/ipv4/fib_frontend.c
View File

@ -155,7 +155,12 @@ struct net_device * ip_dev_find(__be32 addr)
return dev;
}
unsigned inet_addr_type(__be32 addr)
/*
* Find address type as if only "dev" was present in the system. If
* on_dev is NULL then all interfaces are taken into consideration.
*/
static inline unsigned __inet_dev_addr_type(const struct net_device *dev,
__be32 addr)
{
struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } };
struct fib_result res;
@ -175,13 +180,24 @@ unsigned inet_addr_type(__be32 addr)
if (local_table) {
ret = RTN_UNICAST;
if (!local_table->tb_lookup(local_table, &fl, &res)) {
ret = res.type;
if (!dev || dev == res.fi->fib_dev)
ret = res.type;
fib_res_put(&res);
}
}
return ret;
}
unsigned int inet_addr_type(__be32 addr)
{
return __inet_dev_addr_type(NULL, addr);
}
unsigned int inet_dev_addr_type(const struct net_device *dev, __be32 addr)
{
return __inet_dev_addr_type(dev, addr);
}
/* Given (packet source, input interface) and optional (dst, oif, tos):
- (main) check, that source is valid i.e. not broadcast or our local
address.
@ -940,4 +956,5 @@ void __init ip_fib_init(void)
}
EXPORT_SYMBOL(inet_addr_type);
EXPORT_SYMBOL(inet_dev_addr_type);
EXPORT_SYMBOL(ip_dev_find);