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ipv4: Pull icmp socket delivery out into a helper function. 

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-07-11 18:32:17 -07:00
parent 46d3ceabd8
commit 1de9243bbf
1 changed files with 16 additions and 15 deletions
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31
net/ipv4/icmp.c
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@ -634,18 +634,31 @@ out:;
EXPORT_SYMBOL(icmp_send);
static void icmp_socket_deliver(struct sk_buff *skb, u32 info)
{
const struct iphdr *iph = (const struct iphdr *) skb->data;
const struct net_protocol *ipprot;
int protocol = iph->protocol;
raw_icmp_error(skb, protocol, info);
rcu_read_lock();
ipprot = rcu_dereference(inet_protos[protocol]);
if (ipprot && ipprot->err_handler)
ipprot->err_handler(skb, info);
rcu_read_unlock();
}
/*
* Handle ICMP_DEST_UNREACH, ICMP_TIME_EXCEED, and ICMP_QUENCH.
*/
static void icmp_unreach(struct sk_buff *skb)
{
const struct net_protocol *ipprot;
const struct iphdr *iph;
struct icmphdr *icmph;
struct net *net;
u32 info = 0;
int protocol;
net = dev_net(skb_dst(skb)->dev);
@ -726,19 +739,7 @@ static void icmp_unreach(struct sk_buff *skb)
if (!pskb_may_pull(skb, iph->ihl * 4 + 8))
goto out;
iph = (const struct iphdr *)skb->data;
protocol = iph->protocol;
/*
* Deliver ICMP message to raw sockets. Pretty useless feature?
*/
raw_icmp_error(skb, protocol, info);
rcu_read_lock();
ipprot = rcu_dereference(inet_protos[protocol]);
if (ipprot && ipprot->err_handler)
ipprot->err_handler(skb, info);
rcu_read_unlock();
icmp_socket_deliver(skb, info);
out:
return;