- Received packets are dynamically allocated and kept in a
queue for as long as they are needed.

- The layout of the packets was changed from interleaved antennas
to non-interleaved antennas.

- Generate a contiguous buffer from saved packets as needed.

There is extra work caused by this change due to recv() call no
longer saving data directly into the circular buffer, however further
processing is easier due to contiguous nature of the tx antenna buffers
prepared. The impact on performance was not measured.