// for the HISTORY op_code, determine how many transactions will be sent by transaction_list_send_last_n()
// create a packet_data_history struct and send it with the count value equal to the number of
// transactions that will be sent.
// success: SUCCESS
// failure: ERRNO_MP_NO_HISTORY
int transaction_get_history_count_and_send(uint32_t card_id, list_t * tr_list, uint32_t max_tr_count) {
if(0 == tr_list->count) {return ERRNO_MP_NO_HISTORY;}
int tr_send_count = 0;
node_t * curr = tr_list->tail->prev;
while(curr != tr_list->head && (max_tr_count > tr_send_count)) {
// curr->data is the pointer to the transaction entry;
// get transaction
transaction_t * tr = (transaction_t *)curr->data;
// if this transaction matches card_id, count it
if(card_id == tr->card_id) {
// increment tr_send_count
tr_send_count++;
}
// get next node
curr = curr->prev;
}
// create and send the history details
packet_data_history_t pdh;
pdh.count = tr_send_count;
// send history details
transaction_send_history(&pdh);
return SUCCESS;
}
// send transaction details (call func based on op_code).
// success: SUCCESS
// failure: ERRNO_MP_INVALID_OPCODE
int transaction_send_details(transaction_t * tr) {
// get op_code to determine type of transaction
switch(tr->op_code) {
case PURCHASE :
transaction_send_purchase(tr->details);
break;
case RECHARGE :
transaction_send_recharge(tr->details);
break;
case BALANCE :
transaction_send_balance(tr->details);
break;
case HISTORY :
transaction_send_history(tr->details);
break;
case ISSUE :
transaction_send_issue(tr->details);
break;
case REFUND :
transaction_send_refund(tr->details);
break;
default :
return ERRNO_MP_INVALID_OPCODE;
}
return SUCCESS;
}
// send transaction details (call func based on op_code).
// success: SUCCESS
// failure: ERRNO_MP_INVALID_OPCODE
int transaction_send_details(transaction_t * tr) {
#ifdef PATCHED
// VULNERABLE CODE: the transaction does not have details in the AUTH phase
if (tr->state == AUTH) {
return SUCCESS;
}
#endif
// get op_code to determine type of transaction
switch(tr->op_code) {
case PURCHASE :
transaction_send_purchase(tr->details);
break;
case RECHARGE :
transaction_send_recharge(tr->details);
break;
case BALANCE :
transaction_send_balance(tr->details);
break;
case HISTORY :
transaction_send_history(tr->details);
break;
case ISSUE :
transaction_send_issue(tr->details);
break;
case REFUND :
transaction_send_refund(tr->details);
break;
default :
return ERRNO_MP_INVALID_OPCODE;
}
return SUCCESS;
}
