• Thomas Haller's avatar
    policy: add manager for default routes and support multiple default routes · e8824f6a
    Thomas Haller authored
    Up to now, NMPolicy would iterate over all devices to find the "best"
    device and assign the default route to that device.
    
    A better approach is to add a default route to *all* devices that
    are never-default=no. The relative priority is choosen according to
    the route metrics.
    
    If two devices receive the same metric, we want to prefer the device
    that activates first. That way, the default route sticks to the same
    device until a better device activates or the device deactivates.
    Hence, the order of activation is imporant in this case (as it is
    already now).
    
    Also, if several devices have identical metrics, increment their
    metrics so that every metric is unique.
    This makes the routing deterministic according to what we choose as best
    device.
    
    A special case is assumed devices. In this case we cannot adjust the metric
    in face of equal metrics.
    
    Add a new singleton class NMDefaultRouteManager that has a list of all
    devices and their default routes. The manager will order the devices by
    their priority and configure the routes using platform.
    
    Also update the metric for VPN connections. Later we will track VPN
    routes also via NMDefaultRouteManager. For now, fix the VPN metric because
    otherwise VPNs would always get metric 1024 (which is usually much larger then the
    device metrics).
    
    https://bugzilla.gnome.org/show_bug.cgi?id=735512Signed-off-by: Thomas Haller's avatarThomas Haller <thaller@redhat.com>
    e8824f6a
nm-types.h 3.75 KB