CoAP.h

/************************************************************************************
* Copyright (C) 2023                                                               *
* TETCOS, Bangalore. India                                                         *
*                                                                                  *
* Tetcos owns the intellectual property rights in the Product and its content.     *
* The copying, redistribution, reselling or publication of any or all of the       *
* Product or its content without express prior written consent of Tetcos is        *
* prohibited. Ownership and / or any other right relating to the software and all  *
* intellectual property rights therein shall remain at all times with Tetcos.      *
*                                                                                  *
* Author:    Siddharth Makadia                                                     *
*                                                                                  *
* ---------------------------------------------------------------------------------*/
 
#include "main.h"
#include "Stack.h"
 
//CoAP Derived Protocol Parameters default values (in seconds)
#define MAX_TRANSMIT_SPAN       45  
#define MAX_TRANSMIT_WAIT       93
#define MAX_LATENCY             100
#define PROCESSING_DELAY        2
#define MAX_RTT                 202
#define EXCHANGE_LIFETIME       427
#define NON_LIFETIME            145
 
 
#define MESSAGE_SIZE_UPPER_BOUND 1152 //BYTES
#define PAYLOAD_SIZE_UPPER_BOUND 1152 //BYTES
typedef struct stru_NetSim_COAP_Header COAP_Header;
typedef struct stru_NetSim_COAP_Options COAP_Options;
 
typedef struct stru_NetSim_COAP_data COAP_Data;
 
 
/*
A summary of the contents of the CoAP header as per RFC 7252 follows:
 
        0                   1                   2                   3
        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
        |Ver| T |  TKL  |      Code     |          Message ID           |
        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
        |   Token (if any, TKL bytes) ...
        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
        |   Options (if any) ...
        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
        |1 1 1 1 1 1 1 1|    Payload (if any) ...
        +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 
*/
 
typedef enum
{
    CONFIRMABLE,
    NON_CONFIRMABLE,
    ACKNOWLEDGEMENT,
    RESET,
}COAP_TYPE;
 
typedef enum
{
    REQUEST = 0,
    RESPONSE = 2,
    CLIENT_ERROR = 4,
    SERVER_ERROR = 5,
}COAP_CODE;
struct stru_NetSim_COAP_data {
 
    unsigned int Request_messageID;
    unsigned int Request_tokenValue;
    unsigned int Response_messageID;
    unsigned int Response_tokenValue;
 
    unsigned int Response_Received;
    unsigned int RequestACK_Received;
    unsigned int Request_Received;
    unsigned int ResponseACK_Received;
 
    int _RETRANSMIT;
    int _gz;
 
};
struct stru_NetSim_COAP_Options {
    unsigned int optionDelta : 4;
    unsigned int optionLength : 4;
    void* optionvalue;
};
struct stru_NetSim_COAP_Header
{
    unsigned int Version : 2; // always 1
    unsigned int Type : 2; // Confirmable (0), Non-confirmable (1), Acknowledgement (2), or Reset(3)
    unsigned int TokenLength : 4; //length of tokenvalue field in bytes
    unsigned int Code : 8; // request (0) , success response (2) , client error response (4) , server error response(5)
    unsigned int MessageID : 16; //must be match for request and response ACK 
    unsigned int tokenvalue : 32;   //must be a match for request and response message
    struct stru_NetSim_COAP_Options* Options;
 
};
 
 
COAP_Header* fn_NetSim_Application_COAP_GenrateHeader(APP_COAP_INFO* info);
 
void fn_NetSim_Application_COAP_AppIn(ptrAPPLICATION_INFO pstruappinfo, NetSim_PACKET* pstruPacket);
 
int fn_NetSim_Application_COAP_Start(ptrAPPLICATION_INFO appInfo, NetSim_EVENTDETAILS* pstruEventDetails);
int fn_NetSim_Application_StartCOAPAPP(ptrAPPLICATION_INFO appInfo, double time);
int fn_NetSim_Application_COAP_ProcessRequest(ptrAPPLICATION_INFO pstruappinfo, NetSim_PACKET* pstruPacket);
int fn_NetSim_Application_COAP_Sent_ACK(ptrAPPLICATION_INFO pstruappinfo, NetSim_PACKET* pstruPacket);
int fn_NetSim_Application_COAP_Genrate_RequestPacket(ptrAPPLICATION_INFO appInfo, NETSIM_ID nSource, NETSIM_ID nDestination, double time, char* PacketType);
int fn_NetSim_Application_COAP_Genrate_Packet(ptrAPPLICATION_INFO pstruappinfo, NETSIM_ID nSourceId, NETSIM_ID nDestinationId, double size, char* PacketType);
COAP_Header* fn_NetSim_Application_COAP_CopyHeader(COAP_Header* src);