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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 <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2008-03-05 18:30:47 -08:00 • committed by David S. Miller
parent a05c44f6d5
commit ee6b967301
23 changed files with 69 additions and 68 deletions
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5
net/ipv4/tcp_ipv4.c
View file

@ -552,7 +552,7 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb)
if (th->rst)
return;
if (((struct rtable *)skb->dst)->rt_type != RTN_LOCAL)
if (skb->rtable->rt_type != RTN_LOCAL)
return;
/* Swap the send and the receive. */
@ -1262,8 +1262,7 @@ int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
#endif
/* Never answer to SYNs send to broadcast or multicast */
if (((struct rtable *)skb->dst)->rt_flags &
(RTCF_BROADCAST | RTCF_MULTICAST))
if (skb->rtable->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))
goto drop;
/* TW buckets are converted to open requests without