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Commit 68cb7d53 authored by Paolo Abeni's avatar Paolo Abeni Committed by David S. Miller
Browse files

ip: factor out protocol delivery helper 



So that we can re-use it at the UDP level in a later patch

rfc v3 -> v1
 - add the helper declaration into the ip header

Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bcd1665e

include/net/ip.h

+1 −0
Original line number Diff line number Diff line
@@ -155,6 +155,7 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, 
void ip_list_rcv(struct list_head *head, struct packet_type *pt,

		 struct net_device *orig_dev);

int ip_local_deliver(struct sk_buff *skb);

void ip_protocol_deliver_rcu(struct net *net, struct sk_buff *skb, int proto);

int ip_mr_input(struct sk_buff *skb);

int ip_output(struct net *net, struct sock *sk, struct sk_buff *skb);

int ip_mc_output(struct net *net, struct sock *sk, struct sk_buff *skb);

net/ipv4/ip_input.c

+36 −37
Original line number Diff line number Diff line
@@ -188,27 +188,20 @@ bool ip_call_ra_chain(struct sk_buff *skb) 
	return false;

}



static int ip_local_deliver_finish(struct net *net, struct sock *sk, struct sk_buff *skb)

{

	__skb_pull(skb, skb_network_header_len(skb));



	rcu_read_lock();

void ip_protocol_deliver_rcu(struct net *net, struct sk_buff *skb, int protocol)

{

		int protocol = ip_hdr(skb)->protocol;

	const struct net_protocol *ipprot;

		int raw;

	int raw, ret;



resubmit:

	raw = raw_local_deliver(skb, protocol);



	ipprot = rcu_dereference(inet_protos[protocol]);

	if (ipprot) {

			int ret;



		if (!ipprot->no_policy) {

			if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) {

				kfree_skb(skb);

					goto out;

				return;

			}

			nf_reset(skb);

		}
@@ -232,7 +225,13 @@ static int ip_local_deliver_finish(struct net *net, struct sock *sk, struct sk_b 
		}

	}

}

 out:



static int ip_local_deliver_finish(struct net *net, struct sock *sk, struct sk_buff *skb)

{

	__skb_pull(skb, skb_network_header_len(skb));



	rcu_read_lock();

	ip_protocol_deliver_rcu(net, skb, ip_hdr(skb)->protocol);

	rcu_read_unlock();



	return 0;