diff options
| author | Denys Fedoryshchenko <denys@visp.net.lb> | 2012-05-17 23:08:57 +0300 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-06-07 14:58:42 +0200 |
| commit | efdedd5426a94b00d23483a1bcb4af3a91c894db (patch) | |
| tree | fdcf05bb970caa499a8dc86c058a167d8eb098b3 /include/linux/netfilter.h | |
| parent | 1da6dd07989869fa4f8ec1f47d610d12f96eb04d (diff) | |
| download | lwn-efdedd5426a94b00d23483a1bcb4af3a91c894db.tar.gz lwn-efdedd5426a94b00d23483a1bcb4af3a91c894db.zip | |
netfilter: xt_recent: add address masking option
The mask option allows you put all address belonging that mask into
the same recent slot. This can be useful in case that recent is used
to detect attacks from the same network segment.
Tested for backward compatibility.
Signed-off-by: Denys Fedoryshchenko <denys@visp.net.lb>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/linux/netfilter.h')
| -rw-r--r-- | include/linux/netfilter.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h index ff9c84c29b28..4541f33dbfc3 100644 --- a/include/linux/netfilter.h +++ b/include/linux/netfilter.h @@ -94,6 +94,16 @@ static inline int nf_inet_addr_cmp(const union nf_inet_addr *a1, a1->all[3] == a2->all[3]; } +static inline void nf_inet_addr_mask(const union nf_inet_addr *a1, + union nf_inet_addr *result, + const union nf_inet_addr *mask) +{ + result->all[0] = a1->all[0] & mask->all[0]; + result->all[1] = a1->all[1] & mask->all[1]; + result->all[2] = a1->all[2] & mask->all[2]; + result->all[3] = a1->all[3] & mask->all[3]; +} + extern void netfilter_init(void); /* Largest hook number + 1 */ |