Binary data over tcp input

[HKalbasi]

I have a binary arbitrary data, containing \0 and non ascii bytes. I want to transfer it into the fluent bit using the tcp input, but it doesn't work using the none parser as it detects \0 as delimiter. Is there any mode that I can write length and data to emit raw binary data into the fluent bit? If not, is it possible to add a parser or something else for it? I can use msgpack but since my data is already a flat buffer message, it doesn't really make sense to wrap it in an additional msgpack.