moby--moby/libnetwork/drivers/bridge/setup_verify.go

package bridge

import "fmt"

func SetupVerifyConfiguredAddresses(i *Interface) error {
	// Fetch a single IPv4 and a slice of IPv6 addresses from the bridge.
	addrv4, addrsv6, err := i.Addresses()
	if err != nil {
		return err
	}

	// Verify that the bridge IPv4 address matches the requested configuration.
	if i.Config.AddressIPv4 != nil && !addrv4.IP.Equal(i.Config.AddressIPv4.IP) {
		return fmt.Errorf("Bridge IPv4 (%s) does not match requested configuration %s", addrv4.IP, i.Config.AddressIPv4.IP)
	}

	// Verify that one of the bridge IPv6 addresses matches the requested
	// configuration.
	for _, addrv6 := range addrsv6 {
		if addrv6.String() == BridgeIPv6.String() {
			return nil
		}
	}

	return fmt.Errorf("Bridge IPv6 addresses do not match the expected bridge configuration %s", BridgeIPv6)
}