From a55ca1a24b7b216144dc737f621fb68f4a924e38 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Fri, 24 Aug 2018 09:52:22 +0200 Subject: 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 --- src/expression.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'src/expression.c') 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) -- cgit v1.2.3