f-15: ia: first subnet try

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>

internal/netif/route_linux.go

@@ -0,0 +1,21 @@
+//go:build linux
+
+package netif
+
+import (
+	"net"
+
+	"github.com/vishvananda/netlink"
+)
+
+func RouteAdd(iface string, subnet *net.IPNet) error {
+	link, err := netlink.LinkByName(iface)
+	if err != nil {
+		return err
+	}
+	return netlink.RouteAdd(&netlink.Route{
+		LinkIndex: link.Attrs().Index,
+		Dst:       subnet,
+		Scope:     netlink.SCOPE_LINK,
+	})
+}