mbedtlsconnection.h

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/*******************************************************************************
 *
 * Copyright (c) 2013, 2014 Intel Corporation and others.
 * Copyright (c) 2020, Cascoda Ltd.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Distribution License v1.0
 * which accompanies this distribution.
 *
 * The Eclipse Distribution License is available at
 *    http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *    David Navarro, Intel Corporation - initial API and implementation
 *    Ciaran Woodward, Cascoda Ltd - modification for Cascoda SDK, OpenThread and mbedtls
 *
 *******************************************************************************/
 
#ifndef CONNECTION_H_
#define CONNECTION_H_
 
#include <liblwm2m.h>
#include <stdio.h>
#include <unistd.h>
 
#include "mbedtls/certs.h"
#include "mbedtls/error.h"
#include "mbedtls/net_sockets.h"
#include "mbedtls/ssl.h"
#include "mbedtls/timing.h"
 
#include "openthread/ip6.h"
#include "openthread/random_crypto.h"
#include "openthread/udp.h"
 
#include "cascoda-util/cascoda_tasklet.h"
#include "ca821x_error.h"
 
#define LWM2M_STANDARD_PORT_STR "5683"
#define LWM2M_STANDARD_PORT 5683
#define LWM2M_DTLS_PORT_STR "5684"
#define LWM2M_DTLS_PORT 5684
#define LWM2M_BSSERVER_PORT_STR "5685"
#define LWM2M_BSSERVER_PORT 5685
 
enum
{
    CIPHERSUITE_COUNT = 1,    
    CONPOOL_SIZE      = 2,    
    LINK_MTU          = 1280, 
};
 
typedef struct connection_t
{
    otUdpSocket         socket;          
    mbedtls_ssl_context ssl;             
    mbedtls_ssl_config  conf;            
    ca_tasklet          mbedtls_tasklet; 
    otInstance         *otInstance;      
    lwm2m_context_t    *lwm2mH;          
    lwm2m_object_t     *securityObj;     
    int                 cipherSuites[CIPHERSUITE_COUNT + 1]; 
    int                 securityInstId;                      
    uint32_t            intermediateTime; 
    bool                inUse;            
    bool                isTimerPassed;    
    bool                isSecure;         
} connection_t;
 
connection_t *connection_create(otInstance      *aInstance,
                                lwm2m_context_t *lwm2mH,
                                lwm2m_object_t  *securityObj,
                                int              instanceId);
 
void connection_free(connection_t *con);
 
void connection_rx_info_callback(uint16_t aPktLen);
 
void connection_tx_info_callback(uint16_t aPktLen);
 
#endif