opt) connection validation message sends max paylaod size
readSize checks if size is in limits of size_t?




        // should be called without any lock hold
        // TODO in Java as in C++ ? reportChannelStateChange();


                     else
                     // TODO not only first
                     // TODO minor version
                     // TODO what to do if there is no channel, do not search in a loop!!! do this in other thread...!
                     searchResponse(PVAConstants.PVA_MINOR_PROTOCOL_REVISION, addresses[0]);


void transportUnresponsive() { not implemented (also in Java)