improve get_redirect_rule_count() for netfilter_nft too

miniupnpd/netfilter_nft/nftnlrdr.c

@@ -538,6 +538,20 @@ get_redirect_rule(const char * ifname, unsigned short eport, int proto,
 	                             timestamp, packets, bytes);
 }
 
+/* get_redirect_rule_count()
+ * return value : -1 for error or the number of redirection rules */
+int
+get_redirect_rule_count(const char * ifname)
+{
+	int n = 0;
+
+	refresh_nft_cache_redirect();
+	LIST_FOREACH(r, &head_redirect, entry) {
+		n++;
+	}
+	return n;
+}
+
 /*
  * get_redirect_rule_by_index()
  * return -1 when the rule was not found

miniupnpd/upnpredirect.c

@@ -583,7 +583,7 @@ upnp_delete_redirection(unsigned short eport, const char * protocol)
 int
 upnp_get_portmapping_number_of_entries()
 {
-#if defined(USE_PF)
+#if defined(USE_PF) || defined(USE_NFTABLES)
 	return get_redirect_rule_count(ext_if_name);
 #else
 	int n = 0, r = 0;