Handle containers with different network drivers

There is no guarantees that the ep and extEp are using the same driver.
If they are not using the same drivers, the driver for ep will not know
about the networks of extEp and fails the RevokeExternalConnectivity
call.

Signed-off-by: Shayan Pooya <shayan@liveve.org>

libnetwork/endpoint.go

@@ -513,14 +513,22 @@ func (ep *endpoint) sbJoin(sb *sandbox, options ...EndpointOption) error {
 	if moveExtConn {
 		if extEp != nil {
 			log.Debugf("Revoking external connectivity on endpoint %s (%s)", extEp.Name(), extEp.ID())
-			if err = d.RevokeExternalConnectivity(extEp.network.ID(), extEp.ID()); err != nil {
+			extN, err := extEp.getNetworkFromStore()
+			if err != nil {
+				return fmt.Errorf("failed to get network from store during join: %v", err)
+			}
+			extD, err := extN.driver(true)
+			if err != nil {
+				return fmt.Errorf("failed to join endpoint: %v", err)
+			}
+			if err = extD.RevokeExternalConnectivity(extEp.network.ID(), extEp.ID()); err != nil {
 				return types.InternalErrorf(
 					"driver failed revoking external connectivity on endpoint %s (%s): %v",
 					extEp.Name(), extEp.ID(), err)
 			}
 			defer func() {
 				if err != nil {
-					if e := d.ProgramExternalConnectivity(extEp.network.ID(), extEp.ID(), sb.Labels()); e != nil {
+					if e := extD.ProgramExternalConnectivity(extEp.network.ID(), extEp.ID(), sb.Labels()); e != nil {
 						log.Warnf("Failed to roll-back external connectivity on endpoint %s (%s): %v",
 							extEp.Name(), extEp.ID(), e)
 					}
@@ -699,7 +707,15 @@ func (ep *endpoint) sbLeave(sb *sandbox, force bool, options ...EndpointOption)
 	extEp = sb.getGatewayEndpoint()
 	if moveExtConn && extEp != nil {
 		log.Debugf("Programming external connectivity on endpoint %s (%s)", extEp.Name(), extEp.ID())
-		if err := d.ProgramExternalConnectivity(extEp.network.ID(), extEp.ID(), sb.Labels()); err != nil {
+		extN, err := extEp.getNetworkFromStore()
+		if err != nil {
+			return fmt.Errorf("failed to get network from store during leave: %v", err)
+		}
+		extD, err := extN.driver(true)
+		if err != nil {
+			return fmt.Errorf("failed to leave endpoint: %v", err)
+		}
+		if err := extD.ProgramExternalConnectivity(extEp.network.ID(), extEp.ID(), sb.Labels()); err != nil {
 			log.Warnf("driver failed programming external connectivity on endpoint %s: (%s) %v",
 				extEp.Name(), extEp.ID(), err)
 		}