[PATCH libnetfilter_queue 31/32] src: Use a cast in place of convoluted construct

[Duncan Roe <duncan_roe@optusnet.com.au>]

I.e. when calling list_del() and list_add().
We have a list of struct ifindex_node but the fns want struct list_head
which is at the head of struct ifindex_node.
Also audit counter loops to count downwards (c/w 0 is faster).

Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
---
 src/iftable.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/iftable.c b/src/iftable.c
index 1a53893..7eada24 100644
--- a/src/iftable.c
+++ b/src/iftable.c
@@ -192,7 +192,7 @@ struct nlif_handle *nlif_open(void)
 	if (h == NULL)
 		goto err;
 
-	for (i=0; i < NUM_NLIF_ENTRIES; i++)
+	for (i = NUM_NLIF_ENTRIES - 1; i>= 0; i--)
 		INIT_LIST_HEAD(&h->ifindex_hash[i]);
 
 	h->nl = mnl_socket_open(NETLINK_ROUTE);
@@ -226,9 +226,9 @@ void nlif_close(struct nlif_handle *h)
 
 	mnl_socket_close(h->nl);
 
-	for (i=0; i < NUM_NLIF_ENTRIES; i++) {
+	for (i = NUM_NLIF_ENTRIES - 1; i>= 0; i--) {
 		list_for_each_entry_safe(this, tmp, &h->ifindex_hash[i], head) {
-			list_del(&this->head);
+			list_del((struct list_head *)this);
 			free(this);
 		}
 	}
@@ -359,7 +359,7 @@ static int data_cb(const struct nlmsghdr *nlh, void *data)
 	this->index = ifi_msg->ifi_index;
 	this->type = ifi_msg->ifi_type;
 	this->flags = ifi_msg->ifi_flags;
-	list_add(&this->head, &h->ifindex_hash[hash]);
+	list_add((struct list_head *)this, &h->ifindex_hash[hash]);
 found:
 	mnl_attr_for_each(attr, nlh, sizeof(*ifi_msg)) {
 		/* All we want is the interface name */
-- 
2.35.8