Flow of broadcast/multicast packets in pf when a bridge is present

[Andreas Longwitz]

I like to mention that after update to FreeBSD 12.1 Stable r360998 the
correct patch is:

--- if_bridge.c.1st     2020-02-05 01:47:03.000000000 +0100
+++ if_bridge.c 2020-05-18 17:41:11.000000000 +0200
@@ -2406,6 +2406,10 @@
                        (*bifp->if_input)(bifp, mc2);
                }

+               if (!V_pfil_local_phys ) {
+                       m_freem(m);
+                       return (NULL);
+               }
                /* Return the original packet for local processing. */
                return (m);
        }

Andreas