diff options
author | Pablo Neira Ayuso <pablo@netfilter.org> | 2009-07-14 16:43:55 +0200 |
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committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2009-07-14 16:43:55 +0200 |
commit | dd73e5708cc2cd127ba03fd5a82fb96b3928e7fb (patch) | |
tree | 51c6fcb589cdb399bda4f5b134dedf2d1ca5b328 /include/internal/object.h | |
parent | 1c450e1595afdc8d1bfabb4f640c9251808426eb (diff) |
bsf: add support for IPv6 address filtering
This patch adds support to auto-generate BSF code for IPv6. It
requires a Linux kernel >= 2.6.29. The maximum number of addresses
is limited to 20 (12 BSF lines per IPv6 address comparison). I am
not sure that to remove this limit is useful given that oprofile
does not show very good numbers for very large (in terms of lines)
filters. This completes one feature that is available in IPv4 but
that was missing in IPv6.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include/internal/object.h')
-rw-r--r-- | include/internal/object.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/internal/object.h b/include/internal/object.h index ef49590..df002fd 100644 --- a/include/internal/object.h +++ b/include/internal/object.h @@ -222,6 +222,19 @@ struct nfct_filter { u_int32_t mask; } l3proto[2][__FILTER_ADDR_MAX]; + /* + * FIXME: For IPv6 filtering, up to 20 IPs/masks (12 BSF lines + * per comparison). I think that it is not worthy to try to support + * more than that for performance reasons. It seems that oprofile + * shows bad numbers for very large BSF code. + */ + u_int32_t l3proto_elems_ipv6[2]; + struct { +#define __FILTER_IPV6_MAX 20 + u_int32_t addr[4]; + u_int32_t mask[4]; + } l3proto_ipv6[2][__FILTER_IPV6_MAX]; + u_int32_t set[1]; }; |