CC2530: What is the code that retrieves EP, ID, Adresses from ZC?

Ok. So I am now trying to check each cluster ID in the simple descriptor cluster list. How could I do something like this?

for(uint8 cluster=0; cluster < simpleDescRsp.simpleDesc.AppNumInClusters; cluster++){
   if(pAppInClusterList[cluster] == ZCL_CLUSTER_ID_GEN_POWER_CFG){
      onOffEP = ep;
   }
}

You said a list of clusters is in the simple descriptor right? And this list is called pAppInClusterList. However it isn't in array format - it's in uint16 format. I don't see how I can read each cluster in this list?

So basically what I got now is a program that checks all EPs of ZC; then sends a Simple Descriptor Request to each EP if more than 1 EP exists; then checks if any cluster in Simple Descriptor Response matches desired cluster ID; then saves value of EP from the Simple Descriptor Response. It looks like the below. My only concern is the parts that say "WAIT FOR..." in the code. That is because the next part of the code is dependent on a response. So I am not sure if I need to add code to wait for a response before the code moves on to the next part. What do you think?

static uint8 checkCluster( uint8 cID ){
  ////////////////////////////////// Check each EP of ZC if match clusterID
  for(uint8 ep=0; ep < pActiveEndpointRsp->cnt; ep++){
    // Send Simple Descriptor Request to retrieve cluster list to select correct EP
    zAddrType_t destAddr;
    uint16 shortAddr;

    /* Dev address */
    destAddr.addrMode = Addr16Bit;
    destAddr.addr.shortAddr = 0x0000;
    /* Network address of interest */
    shortAddr = 0x0000;
  
    ZDP_SimpleDescReq( &destAddr, shortAddr, ep, 0 );
    
    // WAIT FOR Simple Descriptor Response?
    
    // For each cluster in simple descriptor by ZC,
    // check if match ZCL_CLUSTER_ID_GEN_POWER_CFG
    // to set onOffEP to EP
    for(uint8 cluster=0; cluster < simpleDescRsp.simpleDesc.AppNumInClusters; cluster++){
      if(simpleDescRsp.simpleDesc.pAppInClusterList[cluster] == cID){
        return ep;
      }
    }
  }
  return 1;
}

/* Below is inside another function */

ZDP_ActiveEPReq( &destAddr, shortAddr, 0 );
  
// WAIT FOR EP Response?

onOffEP = checkCluster( ZCL_CLUSTER_ID_GEN_ON_OFF );