refactor: keep bridge name abstract

weaver/weave

@@ -88,7 +88,7 @@ create_bridge() {
         check_command_and_run ethtool ethtool -K $BRIDGE tx off >/dev/null
         # Work around the situation where there are no rules allowing traffic
         # across our bridge. E.g. ufw
-        add_iptables_rule filter FORWARD -i weave -o weave -j ACCEPT
+        add_iptables_rule filter FORWARD -i $BRIDGE -o $BRIDGE -j ACCEPT
     }
     ip link set dev $BRIDGE up
 }
@@ -97,7 +97,7 @@ destroy_bridge() {
     if [ -d /sys/class/net/$BRIDGE ] ; then
         ip link del dev $BRIDGE
     fi
-    run_iptables -t filter -D FORWARD -i weave -o weave -j ACCEPT 2>/dev/null || true
+    run_iptables -t filter -D FORWARD -i $BRIDGE -o $BRIDGE -j ACCEPT 2>/dev/null || true
 }
 
 setup_masquerading() {