Extensions to the netmap framework - Week 5

[Stefano Duo]

Hi,

during the fifth week i reformatted the code using clang-format, as
suggested by my mentor.
Furthermore i implemented a server of file descriptors. Clients connect to
the server through a unix socket, and communicate using the data structures
defined in "fd_server.h" [1]. File descriptors are passed using unix
sockets ancillary data.

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

Stefano.

[1]
https://svnweb.freebsd.org/socsvn/soc2018/sduo/netmap_utils/fd_server.h?view=markup