+ data_len = len - sizeof(*ofmped);
+ ofpbuf_put(&ext_data_buffer, ofmped->data, data_len);
+
+ if (!(ofmped->flags & OFMPEDF_MORE_DATA)) {
+ struct ofmp_header *new_oh;
+ int error;
+
+ /* An embedded message must be greater than the size of an
+ * OpenFlow message. */
+ new_oh = ofpbuf_at(&ext_data_buffer, 0, 65536);
+ if (!new_oh) {
+ VLOG_WARN_RL(&rl, "received short embedded message: %d\n",
+ ext_data_buffer.size);
+ return -EINVAL;
+ }
+
+ /* Make sure that this is a management message and that there's
+ * not an embedded extended data message. */
+ if ((new_oh->header.vendor != htonl(NX_VENDOR_ID))
+ || (new_oh->header.subtype != htonl(NXT_MGMT))
+ || (new_oh->type == htonl(OFMPT_EXTENDED_DATA))) {
+ VLOG_WARN_RL(&rl, "received bad embedded message\n");
+ return -EINVAL;
+ }
+ new_oh->header.header.xid = ext_data_xid;
+ new_oh->header.header.length = 0;