options: emit an empty address item when resolving networks fails

Adjust fw3_parse_network() to emit an empty address item with
.set = false, .resolved = true when we failed to resolve the network
name into any ip address.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 13 insertions, 1 deletions

diff --git a/options.c b/options.c
index f686cf0..6d2a283 100644
--- a/options.c
+++ b/options.c
@@ -342,19 +342,31 @@ fw3_parse_network(void *ptr, const char *val, bool is_list)
 	struct fw3_device dev = { };
 	struct fw3_address *addr, *tmp;
 	LIST_HEAD(addr_list);
+	int n_addrs;
 
 	if (!fw3_parse_address(ptr, val, is_list))
 	{
 		if (!fw3_parse_device(&dev, val, false))
 			return false;
 
-		fw3_ubus_address(&addr_list, dev.name);
+		n_addrs = fw3_ubus_address(&addr_list, dev.name);
+
 		list_for_each_entry(addr, &addr_list, list)
 		{
 			addr->invert = dev.invert;
 			addr->resolved = true;
 		}
 
+		/* add an empty address member with .set = false, .resolved = true
+		 * to signal resolving failure to callers */
+		if (n_addrs == 0)
+		{
+			tmp = fw3_alloc(sizeof(*tmp));
+			tmp->resolved = true;
+
+			list_add_tail(&tmp->list, &addr_list);
+		}
+
 		if (is_list)
 		{
 			list_splice_tail(&addr_list, ptr);