52 lines
1.5 KiB
Go
52 lines
1.5 KiB
Go
package bridge
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import (
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log "github.com/Sirupsen/logrus"
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"github.com/docker/libnetwork/types"
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"github.com/vishvananda/netlink"
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)
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func setupVerifyAndReconcile(config *networkConfiguration, i *bridgeInterface) error {
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// Fetch a single IPv4 and a slice of IPv6 addresses from the bridge.
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addrv4, addrsv6, err := i.addresses()
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if err != nil {
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return err
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}
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// Verify that the bridge does have an IPv4 address.
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if addrv4.IPNet == nil {
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return &ErrNoIPAddr{}
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}
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// Verify that the bridge IPv4 address matches the requested configuration.
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if config.AddressIPv4 != nil && !addrv4.IP.Equal(config.AddressIPv4.IP) {
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return &IPv4AddrNoMatchError{IP: addrv4.IP, CfgIP: config.AddressIPv4.IP}
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}
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// Verify that one of the bridge IPv6 addresses matches the requested
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// configuration.
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if config.EnableIPv6 && !findIPv6Address(netlink.Addr{IPNet: bridgeIPv6}, addrsv6) {
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return (*IPv6AddrNoMatchError)(bridgeIPv6)
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}
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// Release any residual IPv6 address that might be there because of older daemon instances
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for _, addrv6 := range addrsv6 {
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if addrv6.IP.IsGlobalUnicast() && !types.CompareIPNet(addrv6.IPNet, i.bridgeIPv6) {
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if err := netlink.AddrDel(i.Link, &addrv6); err != nil {
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log.Warnf("Failed to remove residual IPv6 address %s from bridge: %v", addrv6.IPNet, err)
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}
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}
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}
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return nil
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}
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func findIPv6Address(addr netlink.Addr, addresses []netlink.Addr) bool {
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for _, addrv6 := range addresses {
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if addrv6.String() == addr.String() {
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return true
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}
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}
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return false
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}
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