of-dpa: don't notify about bridging flows being deleted

controller::handle_bridging_table_rm() will be called for various
reasons, but we actually only care for one, the idle timeout.

Especially we don't care about flows being removed which we
intentionally deleted, so ignore any that aren't idle timeouts.

Fixes: 291591d ("l2 aging added")
Signed-off-by: Jonas Gorski <jonas.gorski@bisdn.de>

src/of-dpa/controller.cc

@@ -446,6 +446,10 @@ void controller::handle_bridging_table_rm(
   rofl::caddress_ll eth_dst;
   uint16_t vid = 0;
 
+  // we only care about flows being timed out
+  if (msg.get_reason() != rofl::openflow13::OFPRR_IDLE_TIMEOUT)
+    return;
+
   try {
     eth_dst = msg.get_match().get_eth_dst();
     vid = msg.get_match().get_vlan_vid() & 0xfff;