@dirk-thomas I used the same pattern used in `TransportTCP` to get peername : [here](https://github.com/ros/ros_comm/blob/4e8a495fdbdcf8088ae7cc569c3c0a8a45c9c9b3/clients/roscpp/src/libros/transport/transport_tcp.cpp#L248) and [here](https://github.com/ros/ros_comm/blob/4e8a495fdbdcf8088ae7cc569c3c0a8a45c9c9b3/clients/roscpp/src/libros/transport/transport_tcp.cpp#L699).