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[NETFILTER]: nf_conntrack: Introduces nf_ct_get_tuplepr and uses it

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nf_ct_get_tuple() requires the offset to transport header and that bothers
callers such as icmp[v6] l4proto modules. This introduces new function
to simplify them.

Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yasuyuki Kozakai
2007-07-14 20:45:14 -07:00
committed by David S. Miller
parent ffc3069048
commit e2a3123fbe
4 changed files with 49 additions and 59 deletions
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30
net/netfilter/nf_conntrack_core.c
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@@ -113,6 +113,36 @@ nf_ct_get_tuple(const struct sk_buff *skb,
}
EXPORT_SYMBOL_GPL(nf_ct_get_tuple);
int nf_ct_get_tuplepr(const struct sk_buff *skb,
unsigned int nhoff,
u_int16_t l3num,
struct nf_conntrack_tuple *tuple)
{
struct nf_conntrack_l3proto *l3proto;
struct nf_conntrack_l4proto *l4proto;
unsigned int protoff;
u_int8_t protonum;
int ret;
rcu_read_lock();
l3proto = __nf_ct_l3proto_find(l3num);
ret = l3proto->get_l4proto(skb, nhoff, &protoff, &protonum);
if (ret != NF_ACCEPT) {
rcu_read_unlock();
return 0;
}
l4proto = __nf_ct_l4proto_find(l3num, protonum);
ret = nf_ct_get_tuple(skb, nhoff, protoff, l3num, protonum, tuple,
l3proto, l4proto);
rcu_read_unlock();
return ret;
}
EXPORT_SYMBOL_GPL(nf_ct_get_tuplepr);
int
nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse,
const struct nf_conntrack_tuple *orig,