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/*
* Copyright (c) 2013-2014 TRUSTONIC LIMITED
* All rights reserved.
*
* 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 TRUSTONIC LIMITED 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 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 HOLDER 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.
*/
#ifndef SESSION_H_
#define SESSION_H_
#include <stdint.h>
#include <list>
#include "Connection.h"
#include "CMcKMod.h"
#include "CMutex.h"
class BulkBufferDescriptor
{
public:
addr_t virtAddr; /**< The virtual address of the Bulk buffer*/
uint32_t sVirtualAddr; /**< The secure virtual address of the Bulk buffer*/
uint32_t len; /**< Length of the Bulk buffer*/
uint32_t handle;
BulkBufferDescriptor(
addr_t virtAddr,
uint32_t sVirtAddr,
uint32_t len,
uint32_t handle
) :
virtAddr(virtAddr),
sVirtualAddr(sVirtAddr),
len(len),
handle(handle)
{};
};
typedef std::list<BulkBufferDescriptor *> bulkBufferDescrList_t;
typedef bulkBufferDescrList_t::iterator bulkBufferDescrIterator_t;
/** Session states.
* At the moment not used !!.
*/
typedef enum {
SESSION_STATE_INITIAL,
SESSION_STATE_OPEN,
SESSION_STATE_TRUSTLET_DEAD
} sessionState_t;
#define SESSION_ERR_NO 0 /**< No session error */
/** Session information structure.
* The information structure is used to hold the state of the session, which will limit further actions for the session.
* Also the last error code will be stored till it's read.
*/
typedef struct {
sessionState_t state; /**< Session state */
int32_t lastErr; /**< Last error of session */
} sessionInformation_t;
class Session
{
private:
CMcKMod *mcKMod;
CMutex workLock;
bulkBufferDescrList_t bulkBufferDescriptors; /**< Descriptors of additional bulk buffer of a session */
sessionInformation_t sessionInfo; /**< Informations about session */
public:
uint32_t sessionId;
Connection *notificationConnection;
Session(uint32_t sessionId, CMcKMod *mcKMod, Connection *connection);
virtual ~Session(void);
/**
* Add address information of additional bulk buffer memory to session and
* register virtual memory in kernel module.
*
* @attention The virtual address can only be added one time. If the virtual address already exist, MC_DRV_ERR_BUFFER_ALREADY_MAPPED is returned.
*
* @param buf The virtual address of bulk buffer.
* @param len Length of bulk buffer.
* @param blkBuf pointer of the actual Bulk buffer descriptor with all address information.
*
* @return MC_DRV_OK on success
* @return MC_DRV_ERR_BUFFER_ALREADY_MAPPED
*/
mcResult_t addBulkBuf(addr_t buf, uint32_t len, BulkBufferDescriptor **blkBuf);
/**
* Just register the buffer previously created to the session
*
* @attention The virtual address can only be added one time. If the virtual address already exist, MC_DRV_ERR_BUFFER_ALREADY_MAPPED is returned.
*
* @param blkBuf pointer of the actual Bulk buffer descriptor with all address information.
*
*/
void addBulkBuf(BulkBufferDescriptor *blkBuf);
/**
* Remove address information of additional bulk buffer memory from session and
* unregister virtual memory in kernel module
*
* @param buf The virtual address of the bulk buffer.
*
* @return true on success.
*/
mcResult_t removeBulkBuf(addr_t buf);
/**
* Return the Kmod handle of the bulk buff
*
* @param buf The secure virtual address of the bulk buffer.
*
* @return the Handle or 0 for failure
*/
uint32_t getBufHandle(uint32_t sVirtAddr, uint32_t sVirtualLen);
/**
* Set additional error information of the last error that occured.
*
* @param errorCode The actual error.
*/
void setErrorInfo(int32_t err);
/**
* Get additional error information of the last error that occured.
*
* @attention After request the information is set to SESSION_ERR_NO.
*
* @return Last stored error code or SESSION_ERR_NO.
*/
int32_t getLastErr(void);
/**
* Lock session for operation
*/
void lock() {
workLock.lock();
}
/**
* Unlock session for operation
*/
void unlock() {
workLock.unlock();
}
};
typedef std::list<Session *> sessionList_t;
typedef sessionList_t::iterator sessionIterator_t;
#endif /* SESSION_H_ */
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