+/* ofp_error_msg 'code' values for OFPET_BAD_REQUEST. 'data' contains at least
+ * the first 64 bytes of the failed request. */
+enum ofp_bad_request_code {
+ OFPBRC_BAD_VERSION, /* ofp_header.version not supported. */
+ OFPBRC_BAD_TYPE, /* ofp_header.type not supported. */
+ OFPBRC_BAD_STAT, /* ofp_stats_request.type not supported. */
+ OFPBRC_BAD_VENDOR /* Vendor not supported (in ofp_vendor or
+ * ofp_stats_request or ofp_stats_reply). */
+};
+
+/* OFPT_ERROR: Error message (datapath -> controller). */
+struct ofp_error_msg {
+ struct ofp_header header;
+
+ uint16_t type;
+ uint16_t code;
+ uint8_t data[0]; /* Variable-length data. Interpreted based
+ on the type and code. */
+};
+OFP_ASSERT(sizeof(struct ofp_error_msg) == 12);
+
+enum ofp_stats_types {
+ /* Description of this OpenFlow switch.
+ * The request body is empty.
+ * The reply body is struct ofp_desc_stats. */
+ OFPST_DESC,
+
+ /* Individual flow statistics.
+ * The request body is struct ofp_flow_stats_request.
+ * The reply body is an array of struct ofp_flow_stats. */
+ OFPST_FLOW,
+
+ /* Aggregate flow statistics.
+ * The request body is struct ofp_aggregate_stats_request.
+ * The reply body is struct ofp_aggregate_stats_reply. */
+ OFPST_AGGREGATE,
+
+ /* Flow table statistics.
+ * The request body is empty.
+ * The reply body is an array of struct ofp_table_stats. */
+ OFPST_TABLE,
+
+ /* Physical port statistics.
+ * The request body is empty.
+ * The reply body is an array of struct ofp_port_stats. */
+ OFPST_PORT,
+
+ /* Vendor extension.
+ * The request and reply bodies begin with a 32-bit vendor ID, which takes
+ * the same form as in "struct ofp_vendor". The request and reply bodies
+ * are otherwise vendor-defined. */
+ OFPST_VENDOR = 0xffff
+};
+
+struct ofp_stats_request {