+ * @param fixup
+ * The function that will be invoked at paket switch time to 'fixup'
+ * the rewrite applied with necessary per-packet info (i.e. length, checksums).
+ * @param fixup_data
+ * Context data set by the caller that is provided as an argument in the
+ * fixup function.
+ *
+ * @param flags
+ * Flags controlling the adjacency behaviour
+ *