Extensions to the netmap framework - Week 6

[Stefano Duo]

Hi,

during the sixth i extended functional.c, implementing the following:
- netmap interface file descriptors can be requested from the fd_server i
wrote the previous week.
- the fd_server can be started (and stopped) through cli arguments. When it
is active, it acts as a daemon, logging stuff to /var/log/syslog.
- source and destination MAC addresses of the frame can be specified during
a send and receive action.
- multiple frames can be sent (and received) though a single ioctl().
- when sending (or receiving) multiple frame, it's possible to change the
fill character, following a deterministic pattern, after each send (or
receive). This way it's possible to check that frames are receive in-order.

Project wiki:
https://wiki.freebsd.org/SummerOfCode2018Projects/ExtensionsToNetmap
SVN repository: https://svnweb.freebsd.org/socsvn/soc2018/sduo/

Stefano.