[NETFILTER]: nf_conntrack: make l3proto->prepare() generic and renames it

The icmp[v6] l4proto modules parse headers in ICMP[v6] error to get tuple.
But they have to find the offset to transport protocol header before that.
Their processings are almost same as prepare() of l3proto modules.
This makes prepare() more generic to simplify icmp[v6] l4proto module
later.

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>

2 files changed, 4 insertions, 4 deletions

diff --git a/include/net/netfilter/ipv6/nf_conntrack_ipv6.h b/include/net/netfilter/ipv6/nf_conntrack_ipv6.h
index b4b6049e01fa..5a8965904377 100644
--- a/include/net/netfilter/ipv6/nf_conntrack_ipv6.h
+++ b/include/net/netfilter/ipv6/nf_conntrack_ipv6.h
@@ -7,7 +7,7 @@ extern struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp6;
 extern struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6;
 extern struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6;
 
-extern int nf_ct_ipv6_skip_exthdr(struct sk_buff *skb, int start,
+extern int nf_ct_ipv6_skip_exthdr(const struct sk_buff *skb, int start,
                                   u8 *nexthdrp, int len);
 
 extern int nf_ct_frag6_init(void);
diff --git a/include/net/netfilter/nf_conntrack_l3proto.h b/include/net/netfilter/nf_conntrack_l3proto.h
index 890752d7f673..e3708a698d8b 100644
--- a/include/net/netfilter/nf_conntrack_l3proto.h
+++ b/include/net/netfilter/nf_conntrack_l3proto.h
@@ -58,11 +58,11 @@ struct nf_conntrack_l3proto
 
         /*
          * Called before tracking. 
-         *      *dataoff: offset of protocol header (TCP, UDP,...) in *pskb
+         *      *dataoff: offset of protocol header (TCP, UDP,...) in skb
          *      *protonum: protocol number
          */
-        int (*prepare)(struct sk_buff **pskb, unsigned int hooknum,
-                       unsigned int *dataoff, u_int8_t *protonum);
+        int (*get_l4proto)(const struct sk_buff *skb, unsigned int nhoff,
+                           unsigned int *dataoff, u_int8_t *protonum);
 
         int (*tuple_to_nfattr)(struct sk_buff *skb,
                                const struct nf_conntrack_tuple *t);