[syslog-ng] RFC5424 sending - dest=unix-stream. Framing?

I have syslog-ng pumping data into a unix-stream destination socketfilething. Data going into this domain socket has lots of adventures, and then emerges as a source unix-stream on another host. Both have flags(syslog-protocol), but the data gets framing errors at the receiver. I think it's become a bytestream (instead of a message stream) enroute, and the recv() is relying on only getting one message at a time, because it can't know the message length any other way, as unix-stream gets messages without framing(?). Is there a way to salvage this? (I noticed TLS might add framing, but since the tunnel is already TLS ...) -- Declan White