Step Four: Receiving a TCAP Transaction

The API function described in this section allows you to receive a TCAP transaction. Transactions are received via transaction handler and registered during initialization. Sample implementation for transaction handler is shown in the following code excerpt.

Application Code

int APP_TransHandler( SKIM_Trans &trans, void *tag)

{

SKIM_OCTET type;

printf("APP_TransHandler Called\n");

SKIM_UINT id;

trans.GetCallReferenceId(id);

trans.GetTransType(type);

switch(type)

{

case SKIM_TC_UNI:

rcvd_callrefid = id;

printf ("Received TCAP UNI call reference id is %x\n", id);

AppReceiveOperation(trans);

break;

case SKIM_TC_BEGIN :

rcvd_callrefid = id;

printf ("Received TCAP Begin call reference id is %x\n", id);

AppReceiveOperation(trans);

break;

case SKIM_TC_CONTINUE :

rcvd_callrefid = id;

printf ("Received TCAP Continue call reference id is %x\n", id);

AppReceiveOperation (trans);

break;

case SKIM_TC_END :

rcvd_callrefid = id;

printf ("Received TCAP End call reference id is %x\n", id);

AppReceiveOperation (trans);

break;

#if defined(ANSI)

case SKIM_TC_ABORT :

rcvd_callrefid = id;

printf ("Received TCAP Abort call reference id is %x\n", id);

break;

#endif

#if defined(CCITT)

case SKIM_TC_U_ABORT :

rcvd_callrefid = id;

printf ("Received TCAP Abort call reference id is %x\n", id);

break;

case SKIM_TC_P_ABORT :

rcvd_callrefid = id;

printf ("Received TCAP Abort call reference id is %x\n", id);

break;

case SKIM_TC_P_ABORT :

rcvd_callrefid = id;

printf ("Received TCAP Abort call reference id is %x\n", id);

break;

#endif

default :

printf("Unknown transaction received\n");

break;

};

return SKIM_SUCCESS;

}

AppReceiveOperation(SKIM_Trans &trans)

{

SKIM_Operation op;

while (trans.RemoveOperation(op) == SKIM_SUCCESS)

{

if (op.GetType() == SKIM_TC_INVOKE)

{

rcvd_invoke_id = op.GetInvokeId();

printf("Received Invoke with Invoke id = %d\n",

op.GetInvokeId());

vector<byte> paramData;

op.GetParameter(paramData);

SKIM_Decode(paramData);

}

else if (op.GetType() == SKIM_TC_RESULT_L)

{

printf("Received Return Result Last with Invoke id = %d\n",

op.GetInvokeId());

vector<byte> paramData;

op.GetParameter(paramData);

SKIM_DecodeResponse(paramData);

}

#if defined(ANSI)

else if (op.GetType() == SKIM_TC_ERROR)

{

printf("Received Return Error with Invoke id = %d\n",

op.GetInvokeId());

}

#endif

#if defined(CCITT)

else if (op.GetType() == SKIM_TC_U_ERROR)

{

printf("Received Return Error Last with Invoke id = %d\n",

op.GetInvokeId());

}

#endif

#if defined(ANSI)

else if (op.GetType() == SKIM_TC_REJECT)

{

printf("Received Return Reject with Invoke id = %d\n",

op.GetInvokeId());

}

#endif

#if defined(CCITT)

else if (op.GetType() == SKIM_TC_U_REJECT ||

op.GetType() == SKIM_TC_L_REJECT ||

op.GetType() == SKIM_TC_R_REJECT)

{

printf("Received Return Error Last with Invoke id = %d\n",

op.GetInvokeId());

}

#endif

else

{

printf("Unknown operation type received\n");

}

}

}