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/netlink_linearize.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/netlink_linearize.c')
-rw-r--r-- | src/netlink_linearize.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/netlink_linearize.c b/src/netlink_linearize.c index 821fcd0a..0bd946a1 100644 --- a/src/netlink_linearize.c +++ b/src/netlink_linearize.c @@ -1269,6 +1269,10 @@ static void netlink_gen_set_stmt(struct netlink_linearize_ctx *ctx, nftnl_expr_set_str(nle, NFTNL_EXPR_DYNSET_SET_NAME, set->handle.set.name); nftnl_expr_set_u32(nle, NFTNL_EXPR_DYNSET_SET_ID, set->handle.set_id); nftnl_rule_add_expr(ctx->nlr, nle); + + if (stmt->set.stmt) + nftnl_expr_set(nle, NFTNL_EXPR_DYNSET_EXPR, + netlink_gen_stmt_stateful(ctx, stmt->set.stmt), 0); } static void netlink_gen_map_stmt(struct netlink_linearize_ctx *ctx, @@ -1296,6 +1300,10 @@ static void netlink_gen_map_stmt(struct netlink_linearize_ctx *ctx, nftnl_expr_set_str(nle, NFTNL_EXPR_DYNSET_SET_NAME, set->handle.set.name); nftnl_expr_set_u32(nle, NFTNL_EXPR_DYNSET_SET_ID, set->handle.set_id); + if (stmt->map.stmt) + nftnl_expr_set(nle, NFTNL_EXPR_DYNSET_EXPR, + netlink_gen_stmt_stateful(ctx, stmt->map.stmt), 0); + nftnl_rule_add_expr(ctx->nlr, nle); } |