This patch implements CAN-Ethernet (or more precisely CAN-UDP) gateway.
The code here is only responsible for routing the messages in kernel
space. Initial configuration and setup of the involved sockets is done
in user space with cegw utility.
Currently, the gateway support IPv4 and IPv6. CAN_FD frames are note
supported.
Signed-off-by: Radek Matějka <radek.matejka@gmail.com> Signed-off-by: Michal Sojka <sojkam1@fel.cvut.cz>