"dds.transport.UDPv4_WAN.builtin.comm_ports"

Array containing the mapping between "RTPS ports", "UDP receive host ports", and "UDP receive public ports".

When the transport is configured using properties, the port mapping array is provided using a JSON string.

For example:

{
     "default": {"host": 8192, "public": 9678},
     "mappings": [
         {"rtps": 1234, "host": 9999, "public": 5678},
         {"rtps": 1235, "host": 9990, "public": 5679},
     ]
 }

It is also possible to configure the mapping with XML:

<transport_builtin>
     <udpv4_wan>
         <comm_ports>
             <default>
                 <host>8192</host>
                 <public>9678</public>
             </default>
             <mappings>
                 <element>
                     <rtps>1234</rtps>
                     <host>9999</host>
                     <public>5678</public>
                 </element>
                 <element>
                     <rtps>1235</rtps>
                     <host>9990</host>
                     <public>5679</public>
                 </element>
             </mappings>
         </comm_ports>
     </udpv4_wan>
 <transport_builtin> 

For additional information on how to set the value of this property, see the Core Libraries User's Manual.

[default] NULL (The UDP ports used for communications will be derived from the RTPS ports associated with the locators for the DomainParticipant and its Endpoints (DataWriters and DataReaders)).