package bridge import ( "fmt" "io/ioutil" "net" "github.com/vishvananda/netlink" ) var bridgeIPv6 *net.IPNet const bridgeIPv6Str = "fe80::1/64" func init() { // We allow ourselves to panic in this special case because we indicate a // failure to parse a compile-time define constant. if ip, netw, err := net.ParseCIDR(bridgeIPv6Str); err == nil { bridgeIPv6 = &net.IPNet{IP: ip, Mask: netw.Mask} } else { panic(fmt.Sprintf("Cannot parse default bridge IPv6 address %q: %v", bridgeIPv6Str, err)) } } func setupBridgeIPv6(config *NetworkConfiguration, i *bridgeInterface) error { // Enable IPv6 on the bridge procFile := "/proc/sys/net/ipv6/conf/" + config.BridgeName + "/disable_ipv6" if err := ioutil.WriteFile(procFile, []byte{'0', '\n'}, 0644); err != nil { return fmt.Errorf("Unable to enable IPv6 addresses on bridge: %v", err) } _, addrsv6, err := i.addresses() if err != nil { return err } // Add the default link local ipv6 address if it doesn't exist if !findIPv6Address(netlink.Addr{IPNet: bridgeIPv6}, addrsv6) { if err := netlink.AddrAdd(i.Link, &netlink.Addr{IPNet: bridgeIPv6}); err != nil { return &IPv6AddrAddError{ip: bridgeIPv6, err: err} } } // Store bridge network and default gateway i.bridgeIPv6 = bridgeIPv6 i.gatewayIPv6 = i.bridgeIPv6.IP return nil } func setupGatewayIPv6(config *NetworkConfiguration, i *bridgeInterface) error { if config.FixedCIDRv6 == nil { return ErrInvalidContainerSubnet } if !config.FixedCIDRv6.Contains(config.DefaultGatewayIPv6) { return ErrInvalidGateway } if _, err := ipAllocator.RequestIP(config.FixedCIDRv6, config.DefaultGatewayIPv6); err != nil { return err } // Store requested default gateway i.gatewayIPv6 = config.DefaultGatewayIPv6 return nil }