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diff --git a/cpu/ixp/npe/IxEthDBSpanningTree.c b/cpu/ixp/npe/IxEthDBSpanningTree.c
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+++ b/cpu/ixp/npe/IxEthDBSpanningTree.c
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+/**
+ * @file IxEthDBSpanningTree.c
+ *
+ * @brief Implementation of the STP API
+ * 
+ * @par
+ * IXP400 SW Release version 2.0
+ * 
+ * -- Copyright Notice --
+ * 
+ * @par
+ * Copyright 2001-2005, Intel Corporation.
+ * All rights reserved.
+ * 
+ * @par
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * @par
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * 
+ * @par
+ * -- End of Copyright Notice --
+ */
+
+
+#include "IxEthDB_p.h"
+
+/**
+ * @brief sets the STP blocking state of a port
+ *
+ * @param portID ID of the port
+ * @param blocked TRUE to block the port or FALSE to unblock it
+ * 
+ * Note that this function is documented in the main component
+ * header file, IxEthDB.h.
+ *
+ * @return IX_ETH_DB_SUCCESS if the operation completed successfully
+ * or an appropriate error message otherwise
+ */
+IX_ETH_DB_PUBLIC 
+IxEthDBStatus ixEthDBSpanningTreeBlockingStateSet(IxEthDBPortId portID, BOOL blocked)
+{
+    IxNpeMhMessage message;
+    IX_STATUS result;
+    
+    IX_ETH_DB_CHECK_PORT(portID);
+    
+    IX_ETH_DB_CHECK_SINGLE_NPE(portID);
+ 
+    IX_ETH_DB_CHECK_FEATURE(portID, IX_ETH_DB_SPANNING_TREE_PROTOCOL);
+    
+    ixEthDBPortInfo[portID].stpBlocked = blocked;
+
+    FILL_SETBLOCKINGSTATE_MSG(message, portID, blocked);
+    
+    IX_ETHDB_SEND_NPE_MSG(IX_ETH_DB_PORT_ID_TO_NPE(portID), message, result);
+    
+    return result;
+}
+
+/**
+ * @brief retrieves the STP blocking state of a port
+ *
+ * @param portID ID of the port
+ * @param blocked address to write the blocked status into
+ *
+ * Note that this function is documented in the main component
+ * header file, IxEthDB.h.
+ *
+ * @return IX_ETH_DB_SUCCESS if the operation completed successfully
+ * or an appropriate error message otherwise
+ */
+IX_ETH_DB_PUBLIC 
+IxEthDBStatus ixEthDBSpanningTreeBlockingStateGet(IxEthDBPortId portID, BOOL *blocked)
+{
+    IX_ETH_DB_CHECK_PORT(portID);
+    
+    IX_ETH_DB_CHECK_SINGLE_NPE(portID);
+ 
+    IX_ETH_DB_CHECK_FEATURE(portID, IX_ETH_DB_SPANNING_TREE_PROTOCOL);
+    
+    IX_ETH_DB_CHECK_REFERENCE(blocked);
+    
+    *blocked = ixEthDBPortInfo[portID].stpBlocked;
+    
+    return IX_ETH_DB_SUCCESS;
+}