Well, the thing is, direct buffers do not have a backing array
(byte[]). So, when i use small direct buffers for reads and writes, at
some point i have to put the contents of the direct buffer into a
larger bytebuffer (one that represents the entire packet i am trying to
send). The catch is that i may need to put the first half of the direct
buffer in one larger buffer (for example, if it's the end few bytes of
the previous packet) and put the rest in a new buffer. And there is
no(?) way to put a specific part (offset + length) of bytebuffer A in
bytebuffer B.

If there is an incorrect assumption in my reasoning let me know ;)