This patch adds a gtp_tunnel structure to avoid having to deal with
functions with lots of parameters. This should also help to extend
the interfaces and the gtp_tunnel object without breaking the binary
interface (which will be good by when ipv6 support will be added).
This patch adds the libgtpnl library. Harald mentioned that he wanted
that the specific code that is added is well encapsulated, so let's
start a small library to interact with the GTP kernel module via netlink
interface.
This was done a bit while in the rush, so the interfaces are not nice
at all and the tools need to be ported on top of this library.
This library will be used to integrate openggsn with the GTP kernel
module.
Pablo Neira Ayuso