diff options
| author | Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> | 2007-07-14 20:45:14 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2007-07-14 20:45:14 -0700 |
| commit | e2a3123fbe58da9fd3f35cd242087896ace6049f (patch) | |
| tree | f17f8b6f505bb50be97e204c382a92288f75c986 /net/ipv4 | |
| parent | ffc30690480bdd337e4914302b926d24870b56b2 (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/ipv4')
| -rw-r--r-- | net/ipv4/netfilter/nf_conntrack_proto_icmp.c | 32 |
1 files changed, 7 insertions, 25 deletions
diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c index 0fe8fb0466e..b8b79992797 100644 --- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c +++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c @@ -136,40 +136,22 @@ icmp_error_message(struct sk_buff *skb, unsigned int hooknum) { struct nf_conntrack_tuple innertuple, origtuple; - struct { - struct icmphdr icmp; - struct iphdr ip; - } _in, *inside; struct nf_conntrack_l4proto *innerproto; struct nf_conntrack_tuple_hash *h; - int dataoff; NF_CT_ASSERT(skb->nfct == NULL); - /* Not enough header? */ - inside = skb_header_pointer(skb, ip_hdrlen(skb), sizeof(_in), &_in); - if (inside == NULL) - return -NF_ACCEPT; - - /* Ignore ICMP's containing fragments (shouldn't happen) */ - if (inside->ip.frag_off & htons(IP_OFFSET)) { - pr_debug("icmp_error_message: fragment of proto %u\n", - inside->ip.protocol); + /* Are they talking about one of our connections? */ + if (!nf_ct_get_tuplepr(skb, + skb_network_offset(skb) + ip_hdrlen(skb) + + sizeof(struct icmphdr), + PF_INET, &origtuple)) { + pr_debug("icmp_error_message: failed to get tuple\n"); return -NF_ACCEPT; } /* rcu_read_lock()ed by nf_hook_slow */ - innerproto = __nf_ct_l4proto_find(PF_INET, inside->ip.protocol); - - dataoff = ip_hdrlen(skb) + sizeof(inside->icmp); - /* Are they talking about one of our connections? */ - if (!nf_ct_get_tuple(skb, dataoff, dataoff + inside->ip.ihl*4, PF_INET, - inside->ip.protocol, &origtuple, - &nf_conntrack_l3proto_ipv4, innerproto)) { - pr_debug("icmp_error_message: ! get_tuple p=%u", - inside->ip.protocol); - return -NF_ACCEPT; - } + innerproto = __nf_ct_l4proto_find(PF_INET, origtuple.dst.protonum); /* Ordinarily, we'd expect the inverted tupleproto, but it's been preserved inside the ICMP. */ |