send method
Implementation
void send(String data) {
if (_showLog == true) {
log('_send\n $data', tag: _TAG);
}
try {
InternetAddress group = InternetAddress(SSDP_MULTICAST_ADDR);
_mSocket.send(const Utf8Encoder().convert(data), group, SSDP_PORT);
} catch (e) {
_mStateListener?.call(STATE_SSDP_SEND_ERROR);
}
}