Algorithm 1 CoAP Request in cNAP

$isProxyOption\leftarrow [coap\_request]$ $coap\_header\leftarrow [coap\_request]$ $Token\leftarrow [coap\_request]$ $request\_type\leftarrow [coap\_request]$ if$request\_type$ = = $Confirmable$ then  $sendemptyACKtorequestingclient$  $request\_type\leftarrow Non-confirmable$ end if if$isProxyOption$ = = $true$ then  $proxyURI\leftarrow [coap\_request]$  $split\_proxyURI(hostURI,port,resourceURI,query)$  $isObserveOption\leftarrow [coap\_request]$  $applyrequestaggregation$  $request\leftarrow newcoap\_packet\left(\right)$  $request\leftarrow coap\_header$  $request\leftarrow insertOption(hostURI,resourceURI)$  if $portandqueryarenotNULL$ then   $request\leftarrow insertOption\left(port\right)$   $request\leftarrow insertOption\left(query\right)$  end if  if $isObserveOption$ = = $true$ then   $applycoapobservealgorithm$   $request\leftarrow insertObserveOption\left(\right)$  end if  if $coap\_requesthaspayload$ then   $request\leftarrow insertPayload\left(\right)$  end if  $/\ast possibilityofICNmulticast$  $\ast multipleserverregisterforthisresource$  $\ast /$  $creatependingICNpublicationListusingToken$  $SIDhost\leftarrow sha256\_hash\left(hostURI\right)$  $SID\leftarrow COAP\_SCOPE\_ID+SIDhost$  $RID\leftarrow generateRandomString\left(\right)$  $ICN\_ID\leftarrow SID+RID$  $updateICN\_ID\_to\_client\_token\_list$  $publishrequesttoICNusingIC{N}_{I}D$ end if