+/* Checks that 'port' is a valid output port for OFPACT_OUTPUT, given that the
+ * switch will never have more than 'max_ports' ports. Returns 0 if 'port' is
+ * valid, otherwise an OpenFlow error code. */
+enum ofperr
+ofpact_check_output_port(ofp_port_t port, ofp_port_t max_ports)
+{
+ switch (port) {
+ case OFPP_IN_PORT:
+ case OFPP_TABLE:
+ case OFPP_NORMAL:
+ case OFPP_FLOOD:
+ case OFPP_ALL:
+ case OFPP_CONTROLLER:
+ case OFPP_NONE:
+ case OFPP_LOCAL:
+ return 0;
+
+ default:
+ if (ofp_to_u16(port) < ofp_to_u16(max_ports)) {
+ return 0;
+ }
+ return OFPERR_OFPBAC_BAD_OUT_PORT;
+ }
+}
+