74 lines
2.0 KiB
Go
74 lines
2.0 KiB
Go
package util
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import (
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"fmt"
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"net"
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"slices"
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"github.com/containers/common/libnetwork/types"
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"github.com/containers/common/libnetwork/util"
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"github.com/containers/common/pkg/config"
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)
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func CreateBridge(n NetUtil, network *types.Network, usedNetworks []*net.IPNet, subnetPools []config.SubnetPool, checkBridgeConflict bool) error {
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if network.NetworkInterface != "" {
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if checkBridgeConflict {
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bridges := GetBridgeInterfaceNames(n)
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if slices.Contains(bridges, network.NetworkInterface) {
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return fmt.Errorf("bridge name %s already in use", network.NetworkInterface)
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}
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}
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if !types.NameRegex.MatchString(network.NetworkInterface) {
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return fmt.Errorf("bridge name %s invalid: %w", network.NetworkInterface, types.ErrInvalidName)
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}
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} else {
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var err error
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network.NetworkInterface, err = GetFreeDeviceName(n)
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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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ipamDriver := network.IPAMOptions[types.Driver]
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// also do this when the driver is unset
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if ipamDriver == "" || ipamDriver == types.HostLocalIPAMDriver {
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if len(network.Subnets) == 0 {
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freeSubnet, err := GetFreeIPv4NetworkSubnet(usedNetworks, subnetPools)
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if err != nil {
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return err
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}
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network.Subnets = append(network.Subnets, *freeSubnet)
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}
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// ipv6 enabled means dual stack, check if we already have
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// a ipv4 or ipv6 subnet and add one if not.
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if network.IPv6Enabled {
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ipv4 := false
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ipv6 := false
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for _, subnet := range network.Subnets {
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if util.IsIPv6(subnet.Subnet.IP) {
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ipv6 = true
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}
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if util.IsIPv4(subnet.Subnet.IP) {
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ipv4 = true
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}
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}
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if !ipv4 {
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freeSubnet, err := GetFreeIPv4NetworkSubnet(usedNetworks, subnetPools)
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if err != nil {
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return err
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}
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network.Subnets = append(network.Subnets, *freeSubnet)
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}
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if !ipv6 {
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freeSubnet, err := GetFreeIPv6NetworkSubnet(usedNetworks)
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if err != nil {
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return err
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}
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network.Subnets = append(network.Subnets, *freeSubnet)
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}
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}
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network.IPAMOptions[types.Driver] = types.HostLocalIPAMDriver
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}
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return nil
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}
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