+/* Copyright (c) 2008 The Board of Trustees of The Leland Stanford
+ * Junior University
+ *
+ * We are making the OpenFlow specification and associated documentation
+ * (Software) available for public use and benefit with the expectation
+ * that others will use, modify and enhance the Software and contribute
+ * those enhancements back to the community. However, since we would
+ * like to make the Software available for broadest use, with as few
+ * restrictions as possible permission is hereby granted, free of
+ * charge, to any person obtaining a copy of this Software to deal in
+ * the Software under the copyrights without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * The name and trademarks of copyright holder(s) may NOT be used in
+ * advertising or publicity pertaining to the Software or any
+ * derivatives without specific, written prior permission.
+ */
+
+#ifndef NICIRA_EXT_H
+#define NICIRA_EXT_H 1
+
+#include "openflow.h"
+
+/* The following vendor extensions, proposed by Nicira Networks, are not yet
+ * ready for standardization (and may never be), so they are not included in
+ * openflow.h. */
+
+#define NX_VENDOR_ID 0x00002320
+
+enum nicira_type {
+ /* Switch status request. The request body is an ASCII string that
+ * specifies a prefix of the key names to include in the output; if it is
+ * the null string, then all key-value pairs are included. */
+ NXT_STATUS_REQUEST,
+
+ /* Switch status reply. The reply body is an ASCII string of key-value
+ * pairs in the form "key=value\n". */
+ NXT_STATUS_REPLY
+};
+
+struct nicira_header {
+ struct ofp_header header;
+ uint32_t vendor_id; /* NX_VENDOR_ID. */
+ uint32_t subtype; /* One of NXT_* above. */
+};
+OFP_ASSERT(sizeof(struct nicira_header) == sizeof(struct ofp_vendor) + 4);
+
+#endif /* nicira-ext.h */