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@@ -19,6 +19,7 @@ func configureInterface(iface netlink.Link, settings *Interface) error {
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{setInterfaceName, fmt.Sprintf("error renaming interface %q to %q", ifaceName, settings.DstName)},
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{setInterfaceIP, fmt.Sprintf("error setting interface %q IP to %q", ifaceName, settings.Address)},
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{setInterfaceIPv6, fmt.Sprintf("error setting interface %q IPv6 to %q", ifaceName, settings.AddressIPv6)},
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+ {setInterfaceRoutes, fmt.Sprintf("error setting interface %q routes to %q", ifaceName, settings.Routes)},
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}
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for _, config := range ifaceConfigurators {
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@@ -63,6 +64,78 @@ func programGateway(path string, gw net.IP) error {
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})
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}
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+// Program a route in to the namespace routing table.
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+func programRoute(path string, dest *net.IPNet, nh net.IP) error {
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+ runtime.LockOSThread()
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+ defer runtime.UnlockOSThread()
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+
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+ origns, err := netns.Get()
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+ if err != nil {
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+ return err
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+ }
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+ defer origns.Close()
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+
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+ f, err := os.OpenFile(path, os.O_RDONLY, 0)
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+ if err != nil {
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+ return fmt.Errorf("failed get network namespace %q: %v", path, err)
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+ }
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+ defer f.Close()
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+
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+ nsFD := f.Fd()
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+ if err = netns.Set(netns.NsHandle(nsFD)); err != nil {
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+ return err
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+ }
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+ defer netns.Set(origns)
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+
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+ gwRoutes, err := netlink.RouteGet(nh)
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+ if err != nil {
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+ return fmt.Errorf("route for the next hop could not be found: %v", err)
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+ }
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+
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+ return netlink.RouteAdd(&netlink.Route{
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+ Scope: netlink.SCOPE_UNIVERSE,
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+ LinkIndex: gwRoutes[0].LinkIndex,
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+ Gw: gwRoutes[0].Gw,
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+ Dst: dest,
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+ })
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+}
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+
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+// Delete a route from the namespace routing table.
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+func removeRoute(path string, dest *net.IPNet, nh net.IP) error {
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+ runtime.LockOSThread()
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+ defer runtime.UnlockOSThread()
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+
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+ origns, err := netns.Get()
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+ if err != nil {
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+ return err
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+ }
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+ defer origns.Close()
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+
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+ f, err := os.OpenFile(path, os.O_RDONLY, 0)
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+ if err != nil {
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+ return fmt.Errorf("failed get network namespace %q: %v", path, err)
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+ }
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+ defer f.Close()
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+
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+ nsFD := f.Fd()
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+ if err = netns.Set(netns.NsHandle(nsFD)); err != nil {
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+ return err
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+ }
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+ defer netns.Set(origns)
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+
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+ gwRoutes, err := netlink.RouteGet(nh)
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+ if err != nil {
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+ return fmt.Errorf("route for the next hop could not be found: %v", err)
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+ }
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+
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+ return netlink.RouteDel(&netlink.Route{
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+ Scope: netlink.SCOPE_UNIVERSE,
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+ LinkIndex: gwRoutes[0].LinkIndex,
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+ Gw: gwRoutes[0].Gw,
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+ Dst: dest,
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+ })
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+}
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+
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func setInterfaceIP(iface netlink.Link, settings *Interface) error {
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ipAddr := &netlink.Addr{IPNet: settings.Address, Label: ""}
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return netlink.AddrAdd(iface, ipAddr)
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@@ -79,3 +152,17 @@ func setInterfaceIPv6(iface netlink.Link, settings *Interface) error {
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func setInterfaceName(iface netlink.Link, settings *Interface) error {
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return netlink.LinkSetName(iface, settings.DstName)
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}
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+
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+func setInterfaceRoutes(iface netlink.Link, settings *Interface) error {
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+ for _, route := range settings.Routes {
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+ err := netlink.RouteAdd(&netlink.Route{
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+ Scope: netlink.SCOPE_UNIVERSE,
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+ LinkIndex: iface.Attrs().Index,
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+ Dst: route,
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+ })
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+ if err != nil {
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+ return err
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+ }
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+ }
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+ return nil
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+}
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