RouteAdd expects at least Dst.IP, Src, or Gw to be set, but accesses the
destination IP without testing for Dst being nil in the first place.
Signed-off-by: Arnaud Porterie <arnaud.porterie@docker.com>
This provides the basic functionality of the iproute2 `route get`
command. It allows you to query netlink for the route to a destination
IP.Net
While implementing I noticed that the `s.Receive()` function was hanging
after the netlink response was recieved, so I added an additional clause
to break from the loop and return the decoded message if the NLM_F_MULTI
flag is not set.
Signed-off-by: Dave Tucker <dave@dtucker.co.uk>
Having object composition causes both client and library to
do potentially unecessary work to retrieve Link attributes
when only index is often sufficient.
