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authorYasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>2007-07-14 20:45:14 -0700
committerDavid S. Miller <davem@davemloft.net>2007-07-14 20:45:14 -0700
commite2a3123fbe58da9fd3f35cd242087896ace6049f (patch)
treef17f8b6f505bb50be97e204c382a92288f75c986 /net/ipv6/netfilter
parentffc30690480bdd337e4914302b926d24870b56b2 (diff)
[NETFILTER]: nf_conntrack: Introduces nf_ct_get_tuplepr and uses it
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>
Diffstat (limited to 'net/ipv6/netfilter')
-rw-r--r--net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c42
1 files changed, 8 insertions, 34 deletions
diff --git a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
index 9defc7e1455..0fca7e8abeb 100644
--- a/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_proto_icmpv6.c
@@ -136,49 +136,23 @@ icmpv6_error_message(struct sk_buff *skb,
{
struct nf_conntrack_tuple intuple, origtuple;
struct nf_conntrack_tuple_hash *h;
- struct icmp6hdr _hdr, *hp;
- unsigned int inip6off;
struct nf_conntrack_l4proto *inproto;
- u_int8_t inprotonum;
- unsigned int inprotoff;
NF_CT_ASSERT(skb->nfct == NULL);
- hp = skb_header_pointer(skb, icmp6off, sizeof(_hdr), &_hdr);
- if (hp == NULL) {
- pr_debug("icmpv6_error: Can't get ICMPv6 hdr.\n");
- return -NF_ACCEPT;
- }
-
- inip6off = icmp6off + sizeof(_hdr);
- if (skb_copy_bits(skb, inip6off+offsetof(struct ipv6hdr, nexthdr),
- &inprotonum, sizeof(inprotonum)) != 0) {
- pr_debug("icmpv6_error: Can't get nexthdr in inner IPv6 "
- "header.\n");
- return -NF_ACCEPT;
- }
- inprotoff = nf_ct_ipv6_skip_exthdr(skb,
- inip6off + sizeof(struct ipv6hdr),
- &inprotonum,
- skb->len - inip6off
- - sizeof(struct ipv6hdr));
-
- if ((inprotoff > skb->len) || (inprotonum == NEXTHDR_FRAGMENT)) {
- pr_debug("icmpv6_error: Can't get protocol header in ICMPv6 "
- "payload.\n");
- return -NF_ACCEPT;
- }
-
- /* rcu_read_lock()ed by nf_hook_slow */
- inproto = __nf_ct_l4proto_find(PF_INET6, inprotonum);
-
/* Are they talking about one of our connections? */
- if (!nf_ct_get_tuple(skb, inip6off, inprotoff, PF_INET6, inprotonum,
- &origtuple, &nf_conntrack_l3proto_ipv6, inproto)) {
+ if (!nf_ct_get_tuplepr(skb,
+ skb_network_offset(skb)
+ + sizeof(struct ipv6hdr)
+ + sizeof(struct icmp6hdr),
+ PF_INET6, &origtuple)) {
pr_debug("icmpv6_error: Can't get tuple\n");
return -NF_ACCEPT;
}
+ /* rcu_read_lock()ed by nf_hook_slow */
+ inproto = __nf_ct_l4proto_find(PF_INET6, origtuple.dst.protonum);
+
/* Ordinarily, we'd expect the inverted tupleproto, but it's
been preserved inside the ICMP. */
if (!nf_ct_invert_tuple(&intuple, &origtuple,