src: chain: Fix nftnl_chain_rule_insert_at()

Extrapolating from iptables nomenclature, one would expect that "insert"
means to prepend the new item to the referenced one, not append. Change
nftnl_chain_rule_insert_at() to do just that and introduce
nftnl_chain_rule_append_at() to insert a rule after the referenced one.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/chain.c b/src/chain.c
index 5f8eb5c..26f9b9d 100644
--- a/src/chain.c
+++ b/src/chain.c
@@ -444,6 +444,12 @@ void nftnl_chain_rule_add_tail(struct nftnl_rule *rule, struct nftnl_chain *c)
 EXPORT_SYMBOL(nftnl_chain_rule_insert_at);
 void nftnl_chain_rule_insert_at(struct nftnl_rule *rule, struct nftnl_rule *pos)
 {
+	list_add_tail(&rule->head, &pos->head);
+}
+
+EXPORT_SYMBOL(nftnl_chain_rule_append_at);
+void nftnl_chain_rule_append_at(struct nftnl_rule *rule, struct nftnl_rule *pos)
+{
 	list_add(&rule->head, &pos->head);
 }