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 /include/statement.h | |
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 'include/statement.h')
-rw-r--r-- | include/statement.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/statement.h b/include/statement.h index 6c583a91..48ba6673 100644 --- a/include/statement.h +++ b/include/statement.h @@ -184,6 +184,7 @@ uint32_t fwd_stmt_type(const char *type); struct set_stmt { struct expr *set; struct expr *key; + struct stmt *stmt; enum nft_dynset_ops op; }; @@ -195,6 +196,7 @@ struct map_stmt { struct expr *set; struct expr *key; struct expr *data; + struct stmt *stmt; enum nft_dynset_ops op; }; |