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[IPV4]: Add 'rtable' field in struct sk_buff to alias 'dst' and avoid casts

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(Anonymous) unions can help us to avoid ugly casts.

A common cast it the (struct rtable *)skb->dst one.

Defining an union like  :
union {
     struct dst_entry *dst;
     struct rtable *rtable;
};
permits to use skb->rtable in place.

Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eric Dumazet 2008-03-05 18:30:47 -08:00 • committed by David S. Miller
commit ee6b967301
23 changed files with 69 additions and 68 deletions
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14
net/bridge/br_netfilter.c
View file

@ -223,8 +223,8 @@ static int br_nf_pre_routing_finish_ipv6(struct sk_buff *skb)
}
nf_bridge->mask ^= BRNF_NF_BRIDGE_PREROUTING;
skb->dst = (struct dst_entry *)&__fake_rtable;
dst_hold(skb->dst);
skb->rtable = &__fake_rtable;
dst_hold(&__fake_rtable.u.dst);
skb->dev = nf_bridge->physindev;
nf_bridge_push_encap_header(skb);
@ -388,8 +388,8 @@ bridged_dnat:
skb->pkt_type = PACKET_HOST;
}
} else {
skb->dst = (struct dst_entry *)&__fake_rtable;
dst_hold(skb->dst);
skb->rtable = &__fake_rtable;
dst_hold(&__fake_rtable.u.dst);
}
skb->dev = nf_bridge->physindev;
@ -608,9 +608,9 @@ static unsigned int br_nf_local_in(unsigned int hook, struct sk_buff *skb,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
if (skb->dst == (struct dst_entry *)&__fake_rtable) {
dst_release(skb->dst);
skb->dst = NULL;
if (skb->rtable == &__fake_rtable) {
dst_release(&__fake_rtable.u.dst);
skb->rtable = NULL;
}
return NF_ACCEPT;