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netfilter: nfnetlink_queue: allow to attach expectations to conntracks

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This patch adds the capability to attach expectations via nfnetlink_queue.
This is required by conntrack helpers that trigger expectations based on
the first packet seen like the TFTP and the DHCPv6 user-space helpers.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2013-08-07 18:13:20 +02:00
commit bd07793705
6 changed files with 114 additions and 16 deletions
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2
include/linux/netfilter.h
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@ -325,6 +325,8 @@ struct nfq_ct_hook {
size_t (*build_size)(const struct nf_conn *ct);
int (*build)(struct sk_buff *skb, struct nf_conn *ct);
int (*parse)(const struct nlattr *attr, struct nf_conn *ct);
int (*attach_expect)(const struct nlattr *attr, struct nf_conn *ct,
u32 portid, u32 report);
};
extern struct nfq_ct_hook __rcu *nfq_ct_hook;