def submit(self):
        """Submit traced TCP flows."""
        self._newflg = False
        ret = list()
        for buf in self._buffer.values():
            buf = copy.deepcopy(buf)
            if self._fdpext:
                buf['fpout'] = f"{self._fproot}/{buf['label']}.{self._fdpext}"
            else:
                del buf['fpout']
            buf['index'] = tuple(buf['index'])
            ret.append(Info(buf))
        ret += self._stream
        return tuple(ret)
Submit traced TCP flows.