IPA configuration manager daemon and IPA NAT library.

These are user-space components which configure IPA
(Internet Protocol Accelerator) HW using the services
provided by the IPA driver (running in kernel space).
NAT stands for Network Address Translation. This is the
initial commit of these components.

Change-Id: I0934f54c36a7134af143e4f1cd9fbb0682df52d0

1 files changed, 165 insertions, 0 deletions

diff --git a/ipacm/src/IPACM_CmdQueue.cpp b/ipacm/src/IPACM_CmdQueue.cpp
new file mode 100644
index 0000000..632ae5d
--- /dev/null
+++ b/ipacm/src/IPACM_CmdQueue.cpp
@@ -0,0 +1,165 @@
+/* 
+Copyright (c) 2013, The Linux Foundation. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+		* Redistributions of source code must retain the above copyright
+			notice, this list of conditions and the following disclaimer.
+		* 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.
+		* Neither the name of The Linux Foundation nor the names of its
+			contributors may be used to endorse or promote products derived
+			from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+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.
+*/
+/*!
+	@file
+	IPACM_CmdQueue.cpp
+
+	@brief
+	This file implements the IPAM Comment Queue functionality
+
+	@Author 
+   Sunil
+
+*/
+#include <string.h>
+#include "IPACM_CmdQueue.h"
+#include "IPACM_Log.h"
+
+pthread_mutex_t mutex    = PTHREAD_MUTEX_INITIALIZER;
+pthread_cond_t  cond_var = PTHREAD_COND_INITIALIZER;
+
+MessageQueue* MessageQueue::inst = NULL;
+MessageQueue* MessageQueue::getInstance()
+{
+	if(inst == NULL)
+	{
+		inst = new MessageQueue();
+		if(inst == NULL)
+		{
+			IPACMERR("unable to create Message Queue instance\n");
+			return NULL;
+		}
+	}
+
+	return inst;
+}
+
+void MessageQueue::enqueue(Message *item)
+{
+	if(!Head)
+	{
+		Tail = item;
+		Head = item;
+	}
+	else
+	{
+		if(Tail == NULL)
+		{
+			IPACMDBG("Tail is null\n");
+			Head->setnext(item);
+		}
+		else
+		{
+			Tail->setnext(item);
+		}
+		Tail = item;
+	}
+}
+
+
+Message* MessageQueue::dequeue(void)
+{
+	if(Head == NULL)
+	{
+		return NULL;
+	}
+	else
+	{
+		Message *tmp = Head;
+		Head = Head->getnext();
+
+		return tmp;
+	}
+}
+
+
+void* MessageQueue::Process(void *param)
+{
+	MessageQueue *MsgQueue = NULL;
+	Message *item = NULL;
+	IPACMDBG("MessageQueue::Process()\n");
+
+	MsgQueue = MessageQueue::getInstance();
+	if(MsgQueue == NULL)
+	{
+		IPACMDBG("unable to start cmd queue process\n");
+		return NULL;
+	}
+
+	while(1)
+	{
+		if(pthread_mutex_lock(&mutex) != 0)
+		{
+			IPACMERR("unable to lock the mutex\n");
+			return NULL;
+		}
+
+		item = MsgQueue->dequeue();
+
+		if(item == NULL)
+		{
+			IPACMDBG("Waiting for Message\n");
+
+			if(pthread_cond_wait(&cond_var, &mutex) != 0)
+			{
+				IPACMERR("unable to lock the mutex\n");
+
+				if(pthread_mutex_unlock(&mutex) != 0)
+				{
+					IPACMERR("unable to unlock the mutex\n");
+					return NULL;
+				}
+
+				return NULL;
+			}
+
+			if(pthread_mutex_unlock(&mutex) != 0)
+			{
+				IPACMERR("unable to unlock the mutex\n");
+				return NULL;
+			}
+
+		}
+		else
+		{
+			if(pthread_mutex_unlock(&mutex) != 0)
+			{
+				IPACMERR("unable to unlock the mutex\n");
+				return NULL;
+			}
+
+			IPACMDBG("Processing item %p\n",item);
+			item->evt.callback_ptr(&item->evt.data);
+			delete item;
+			item = NULL;
+		}
+
+	} /* Go forever until a termination indication is received */
+
+}