diff options
| author | Florian Westphal <fw@strlen.de> | 2013-01-11 06:30:46 +0000 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2013-01-18 00:28:17 +0100 |
| commit | 9b21f6a90924dfe8e5e686c314ddb441fb06501e (patch) | |
| tree | 015decd07bc0bc7dfd53e8e2a417a138964a2b20 /include/net/netfilter/nf_conntrack_labels.h | |
| parent | 0ceabd83875b72a29f33db4ab703d6ba40ea4c58 (diff) | |
netfilter: ctnetlink: allow userspace to modify labels
Add the ability to set/clear labels assigned to a conntrack
via ctnetlink.
To allow userspace to only alter specific bits, Pablo suggested to add
a new CTA_LABELS_MASK attribute:
The new set of active labels is then determined via
active = (active & ~mask) ^ changeset
i.e., the mask selects those bits in the existing set that should be
changed.
This follows the same method already used by MARK and CONNMARK targets.
Omitting CTA_LABELS_MASK is the same as setting all bits in CTA_LABELS_MASK
to 1: The existing set is replaced by the one from userspace.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/net/netfilter/nf_conntrack_labels.h')
| -rw-r--r-- | include/net/netfilter/nf_conntrack_labels.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/net/netfilter/nf_conntrack_labels.h b/include/net/netfilter/nf_conntrack_labels.h index b94fe31c7b39..a3ce5d076fca 100644 --- a/include/net/netfilter/nf_conntrack_labels.h +++ b/include/net/netfilter/nf_conntrack_labels.h @@ -46,6 +46,9 @@ static inline struct nf_conn_labels *nf_ct_labels_ext_add(struct nf_conn *ct) bool nf_connlabel_match(const struct nf_conn *ct, u16 bit); int nf_connlabel_set(struct nf_conn *ct, u16 bit); +int nf_connlabels_replace(struct nf_conn *ct, + const u32 *data, const u32 *mask, unsigned int words); + #ifdef CONFIG_NF_CONNTRACK_LABELS int nf_conntrack_labels_init(struct net *net); void nf_conntrack_labels_fini(struct net *net); |