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/** @addtogroup MCD_IMPL_LIB
* @{
* @file
* <!-- Copyright Giesecke & Devrient GmbH 2009 - 2012 -->
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef SESSION_H_
#define SESSION_H_
#include "common.h"
#include <linux/list.h>
#include "connection.h"
struct bulk_buffer_descriptor {
void *virt_addr;/**< The virtual address of the Bulk buffer*/
uint32_t len; /**< Length of the Bulk buffer*/
uint32_t handle;
void *phys_addr_wsm_l2; /**< The physical address of the
L2 table of the Bulk buffer*/
struct list_head list; /**< The list param for using the kernel lists*/
};
struct bulk_buffer_descriptor *bulk_buffer_descriptor_create(
void *virt_addr,
uint32_t len,
uint32_t handle,
void *phys_addr_wsm_l2
);
/** Session states.
* At the moment not used !!.
*/
enum session_state {
SESSION_STATE_INITIAL,
SESSION_STATE_OPEN,
SESSION_STATE_TRUSTLET_DEAD
};
#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.
*/
struct session_information {
enum session_state state; /**< Session state */
int32_t last_error; /**< Last error of session */
};
struct session {
struct mc_instance *instance;
/**< Descriptors of additional bulk buffer of a session */
struct list_head bulk_buffer_descriptors;
/**< Informations about session */
struct session_information session_info;
uint32_t session_id;
struct connection *notification_connection;
/**< The list param for using the kernel lists*/
struct list_head list;
};
struct session *session_create(
uint32_t session_id,
void *instance,
struct connection *connection
);
void session_cleanup(
struct session *session
);
/**
* 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, NULL is returned.
*
* @param buf The virtual address of bulk buffer.
* @param len Length of bulk buffer.
*
* @return On success the actual Bulk buffer descriptor with all address
* information is retured, NULL if an error occurs.
*/
struct bulk_buffer_descriptor *session_add_bulk_buf(
struct session *session,
void *buf,
uint32_t len
);
/**
* 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.
*/
bool session_remove_bulk_buf(
struct session *session,
void *buf
);
/**
* Set additional error information of the last error that occured.
*
* @param errorCode The actual error.
*/
void session_set_error_info(
struct session *session,
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 session_get_last_err(
struct session *session
);
#endif /* SESSION_H_ */
/** @} */
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