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/expression.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/expression.c')
-rw-r--r-- | src/expression.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/src/expression.c b/src/expression.c index bea0f4c8..0bd51122 100644 --- a/src/expression.c +++ b/src/expression.c @@ -1045,13 +1045,12 @@ static void set_elem_expr_print(const struct expr *expr, nft_print(octx, " expires "); time_print(expr->expiration, octx); } - if (expr->comment) - nft_print(octx, " comment \"%s\"", expr->comment); - if (expr->stmt) { - nft_print(octx, " : "); + nft_print(octx, " "); stmt_print(expr->stmt, octx); } + if (expr->comment) + nft_print(octx, " comment \"%s\"", expr->comment); } static void set_elem_expr_destroy(struct expr *expr) |