src: add NFTNL_SET_EXPRESSIONS

NFTNL_SET_EXPR defines the stateful expression type that this set stores
in each element. This provides the set definition in terms of stateful
expressions. The expression that is passed via NFNTL_SET_ELEM_EXPR must
equal to this set stateful expression type, otherwise the kernel bails
out.

This patch adds support for the set expression list, which generalizes
NFTNL_SET_EXPR.

This patch also adds nftnl_set_add_expr() to add new expressions to a set
and nftnl_set_elem_expr_foreach() to iterate over the list of expressions.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/set.h b/include/set.h
index 66ac129..55018b6 100644
--- a/include/set.h
+++ b/include/set.h
@@ -33,7 +33,7 @@ struct nftnl_set {
 	uint32_t		flags;
 	uint32_t		gc_interval;
 	uint64_t		timeout;
-	struct nftnl_expr	*expr;
+	struct list_head	expr_list;
 };
 
 struct nftnl_set_list;