cli: set the rules index

If rule->index is not set by the front-end (as nftables and iptables
does), all the rules will count packets towards the first entry of the
BPF counters map.

src/cli/cli.c

@@ -84,6 +84,17 @@ int main(int argc, char *argv[])
         return EXIT_FAILURE;
     }
 
+    // Set rules indexes
+    bf_list_foreach (&chains, chain_node) {
+        struct bf_chain *chain = bf_list_node_get_data(chain_node);
+        uint32_t index = 0;
+
+        bf_list_foreach (&chain->rules, rule_node) {
+            struct bf_rule *rule = bf_list_node_get_data(rule_node);
+            rule->index = index++;
+        }
+    }
+
     bf_list_foreach (&chains, chain_node) {
         struct bf_chain *chain = bf_list_node_get_data(chain_node);
         _cleanup_bf_request_ struct bf_request *request = NULL;