// +build !windows
 
 package runconfig
 
 import (

 	"fmt"
 	"runtime"

 	"strings"
 

 	"github.com/docker/engine-api/types/container"

 )

 // DefaultDaemonNetworkMode returns the default network stack the daemon should
 // use.

 func DefaultDaemonNetworkMode() container.NetworkMode {
 	return container.NetworkMode("bridge")

 }
 

 // IsPreDefinedNetwork indicates if a network is predefined by the daemon
 func IsPreDefinedNetwork(network string) bool {

 	n := container.NetworkMode(network)

 	return n.IsBridge() || n.IsHost() || n.IsNone() || n.IsDefault()

 }
 

 // ValidateNetMode ensures that the various combinations of requested
 // network settings are valid.

 func ValidateNetMode(c *container.Config, hc *container.HostConfig) error {

 	// We may not be passed a host config, such as in the case of docker commit
 	if hc == nil {
 		return nil
 	}
 	parts := strings.Split(string(hc.NetworkMode), ":")
 	if parts[0] == "container" {
 		if len(parts) < 2 || parts[1] == "" {
 			return fmt.Errorf("--net: invalid net mode: invalid container format container:<name|id>")
 		}
 	}
 
 	if (hc.NetworkMode.IsHost() || hc.NetworkMode.IsContainer()) && c.Hostname != "" {
 		return ErrConflictNetworkHostname
 	}
 
 	if hc.NetworkMode.IsHost() && len(hc.Links) > 0 {
 		return ErrConflictHostNetworkAndLinks
 	}
 
 	if hc.NetworkMode.IsContainer() && len(hc.Links) > 0 {
 		return ErrConflictContainerNetworkAndLinks
 	}
 
 	if (hc.NetworkMode.IsHost() || hc.NetworkMode.IsContainer()) && len(hc.DNS) > 0 {
 		return ErrConflictNetworkAndDNS
 	}
 
 	if (hc.NetworkMode.IsContainer() || hc.NetworkMode.IsHost()) && len(hc.ExtraHosts) > 0 {
 		return ErrConflictNetworkHosts
 	}
 
 	if (hc.NetworkMode.IsContainer() || hc.NetworkMode.IsHost()) && c.MacAddress != "" {
 		return ErrConflictContainerNetworkAndMac
 	}
 
 	if hc.NetworkMode.IsContainer() && (len(hc.PortBindings) > 0 || hc.PublishAllPorts == true) {
 		return ErrConflictNetworkPublishPorts
 	}
 
 	if hc.NetworkMode.IsContainer() && len(c.ExposedPorts) > 0 {
 		return ErrConflictNetworkExposePorts
 	}
 	return nil
 }
 
 // ValidateIsolationLevel performs platform specific validation of the
 // isolation level in the hostconfig structure. Linux only supports "default"
 // which is LXC container isolation

 func ValidateIsolationLevel(hc *container.HostConfig) error {

 	// We may not be passed a host config, such as in the case of docker commit
 	if hc == nil {
 		return nil
 	}
 	if !hc.Isolation.IsValid() {
 		return fmt.Errorf("invalid --isolation: %q - %s only supports 'default'", hc.Isolation, runtime.GOOS)
 	}
 	return nil
 }