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dtlsconnection.h
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dtlsconnection.h
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/*******************************************************************************
*
* Copyright (c) 2015 Intel Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* and Eclipse Distribution License v1.0 which accompany this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v20.html
* The Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Simon Bernard - initial API and implementation
* Christian Renz - Please refer to git log
*
*******************************************************************************/
#ifndef DTLS_CONNECTION_H_
#define DTLS_CONNECTION_H_
#include <stdio.h>
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <stdint.h>
#include <stdbool.h>
#include "tinydtls/tinydtls.h"
#include "tinydtls/dtls.h"
#include "liblwm2m.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
// after 40sec of inactivity we rehandshake
#define DTLS_NAT_TIMEOUT 40
typedef struct _dtls_connection_t
{
struct _dtls_connection_t * next;
int sock;
struct sockaddr_in6 addr;
size_t addrLen;
session_t * dtlsSession;
lwm2m_object_t * securityObj;
int securityInstId;
lwm2m_context_t * lwm2mH;
dtls_context_t * dtlsContext;
time_t lastSend; // last time a data was sent to the server (used for NAT timeouts)
} dtls_connection_t;
int create_socket(const char * portStr, int ai_family);
dtls_connection_t * connection_find(dtls_connection_t * connList, const struct sockaddr_storage * addr, size_t addrLen);
dtls_connection_t * connection_new_incoming(dtls_connection_t * connList, int sock, const struct sockaddr * addr, size_t addrLen);
dtls_connection_t * connection_create(dtls_connection_t * connList, int sock, lwm2m_object_t * securityObj, int instanceId, lwm2m_context_t * lwm2mH, int addressFamily);
void connection_free(dtls_connection_t * connList);
int connection_send(dtls_connection_t *connP, uint8_t * buffer, size_t length);
int connection_handle_packet(dtls_connection_t *connP, uint8_t * buffer, size_t length);
// rehandshake a connection, useful when your NAT timed out and your client has a new IP/PORT
int connection_rehandshake(dtls_connection_t *connP, bool sendCloseNotify);
#endif