package util import ( "net" "github.com/containers/podman/v3/libpod/define" "github.com/containers/podman/v3/libpod/network/types" "github.com/containers/podman/v3/libpod/network/util" pkgutil "github.com/containers/podman/v3/pkg/util" "github.com/pkg/errors" ) func CreateBridge(n NetUtil, network *types.Network, usedNetworks []*net.IPNet) error { if network.NetworkInterface != "" { bridges := GetBridgeInterfaceNames(n) if pkgutil.StringInSlice(network.NetworkInterface, bridges) { return errors.Errorf("bridge name %s already in use", network.NetworkInterface) } if !define.NameRegex.MatchString(network.NetworkInterface) { return errors.Wrapf(define.RegexError, "bridge name %s invalid", network.NetworkInterface) } } else { var err error network.NetworkInterface, err = GetFreeDeviceName(n) if err != nil { return err } } if len(network.Subnets) == 0 { freeSubnet, err := GetFreeIPv4NetworkSubnet(usedNetworks) if err != nil { return err } network.Subnets = append(network.Subnets, *freeSubnet) } // ipv6 enabled means dual stack, check if we already have // a ipv4 or ipv6 subnet and add one if not. if network.IPv6Enabled { ipv4 := false ipv6 := false for _, subnet := range network.Subnets { if util.IsIPv6(subnet.Subnet.IP) { ipv6 = true } if util.IsIPv4(subnet.Subnet.IP) { ipv4 = true } } if !ipv4 { freeSubnet, err := GetFreeIPv4NetworkSubnet(usedNetworks) if err != nil { return err } network.Subnets = append(network.Subnets, *freeSubnet) } if !ipv6 { freeSubnet, err := GetFreeIPv6NetworkSubnet(usedNetworks) if err != nil { return err } network.Subnets = append(network.Subnets, *freeSubnet) } } network.IPAMOptions["driver"] = types.HostLocalIPAMDriver return nil }