diff options
author | Pablo Neira Ayuso <pablo@netfilter.org> | 2018-08-24 09:52:22 +0200 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2018-08-24 09:52:22 +0200 |
commit | a55ca1a24b7b216144dc737f621fb68f4a924e38 (patch) | |
tree | e104f4c5d5ad34b39f58a3b05b80aba85858d0c0 /src/rule.c | |
parent | 0e90798e98121abab274434ec60f0b873f510021 (diff) |
src: integrate stateful expressions into sets and maps
The following example shows how to populate a set from the packet path
using the destination IP address, for each entry there is a counter. The
entry expires after the 1 hour timeout if no packets matching this entry
are seen.
table ip x {
set xyz {
type ipv4_addr
size 65535
flags dynamic,timeout
timeout 1h
}
chain y {
type filter hook output priority filter; policy accept;
update @xyz { ip daddr counter } counter
}
}
Similar example, that creates a mapping better IP address and mark,
where the mark is assigned using an incremental sequence generator from
0 to 1 inclusive.
table ip x {
map xyz {
type ipv4_addr : mark
size 65535
flags dynamic,timeout
timeout 1h
}
chain y {
type filter hook input priority filter; policy accept;
update @xyz { ip saddr counter : numgen inc mod 2 }
}
}
Supported stateful statements are: limit, quota, counter and connlimit.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'src/rule.c')
-rw-r--r-- | src/rule.c | 7 |
1 files changed, 4 insertions, 3 deletions
@@ -336,10 +336,11 @@ static void set_print_declaration(const struct set *set, const char *type; uint32_t flags; - if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT)) - type = "map"; - else if (set->flags & NFT_SET_EVAL) + if ((set->flags & (NFT_SET_EVAL | NFT_SET_ANONYMOUS)) == + (NFT_SET_EVAL | NFT_SET_ANONYMOUS)) type = "meter"; + else if (set->flags & (NFT_SET_MAP | NFT_SET_OBJECT)) + type = "map"; else type = "set"; |