[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>
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@ -118,6 +118,7 @@ extern unsigned short ip_rt_frag_needed(struct iphdr *iph, unsigned short new_mt
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extern void ip_rt_send_redirect(struct sk_buff *skb);
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extern unsigned inet_addr_type(__be32 addr);
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extern unsigned inet_dev_addr_type(const struct net_device *dev, __be32 addr);
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extern void ip_rt_multicast_event(struct in_device *);
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extern int ip_rt_ioctl(unsigned int cmd, void __user *arg);
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extern void ip_rt_get_source(u8 *src, struct rtable *rt);
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@ -155,7 +155,12 @@ out:
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return dev;
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}
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unsigned inet_addr_type(__be32 addr)
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/*
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* Find address type as if only "dev" was present in the system. If
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* on_dev is NULL then all interfaces are taken into consideration.
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*/
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static inline unsigned __inet_dev_addr_type(const struct net_device *dev,
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__be32 addr)
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{
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struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } };
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struct fib_result res;
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@ -175,6 +180,7 @@ unsigned inet_addr_type(__be32 addr)
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if (local_table) {
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ret = RTN_UNICAST;
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if (!local_table->tb_lookup(local_table, &fl, &res)) {
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if (!dev || dev == res.fi->fib_dev)
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ret = res.type;
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fib_res_put(&res);
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}
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@ -182,6 +188,16 @@ unsigned inet_addr_type(__be32 addr)
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return ret;
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}
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unsigned int inet_addr_type(__be32 addr)
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{
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return __inet_dev_addr_type(NULL, addr);
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}
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unsigned int inet_dev_addr_type(const struct net_device *dev, __be32 addr)
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{
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return __inet_dev_addr_type(dev, addr);
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}
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/* Given (packet source, input interface) and optional (dst, oif, tos):
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- (main) check, that source is valid i.e. not broadcast or our local
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address.
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@ -940,4 +956,5 @@ void __init ip_fib_init(void)
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}
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EXPORT_SYMBOL(inet_addr_type);
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EXPORT_SYMBOL(inet_dev_addr_type);
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EXPORT_SYMBOL(ip_dev_find);
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