[ibr-dtn] IBR-DTN Bundle size limit

Hello,

I'm using the IBR-DTN service in android to share a string file that is rather big. I noticed that it sends lots of bundles in sequence and not one big bundle with all the file. Can anyone help me on how to get all theses bundles that arrive and then merge the information? Furthermore, what are the size limitations of a IBR-DTN bundle? Is there anyway to make it bigger?

Thanks in advance, Guilherme Rolim