import org.projectfloodlight.openflow.protocol.OFRoleStatus; //导入依赖的package包/类
@Override
void processOFRoleStatus(OFRoleStatus m) {
	/**
	 *  Tulio Ribeiro
	 *  
	 *  Controller roles. 
	 *  enum ofp_controller_role { 
	 *  OFPCR_ROLE_NOCHANGE = 	0, Don’t change current role. 
	 *  OFPCR_ROLE_EQUAL = 		1, Default role, full access. 
	 *  OFPCR_ROLE_MASTER = 	2, Full access, at most one master. 
	 *  OFPCR_ROLE_SLAVE = 		3, Read-only access. 
	 *  };
	 */
	long role = m.getRole();
	if(role==3)
		sendRoleRequest(OFControllerRole.ROLE_SLAVE);
	else if (role==2)
		sendRoleRequest(OFControllerRole.ROLE_MASTER);
	else if (role==1)
		sendRoleRequest(OFControllerRole.ROLE_EQUAL);
	else
		sendRoleRequest(OFControllerRole.ROLE_NOCHANGE);
}
 

import org.projectfloodlight.openflow.protocol.OFRoleStatus; //导入依赖的package包/类
/**
 * Process an OF message received on the channel and
 * update state accordingly.
 *
 * The main "event" of the state machine. Process the received message,
 * send follow up message if required and update state if required.
 *
 * Switches on the message type and calls more specific event handlers
 * for each individual OF message type. If we receive a message that
 * is supposed to be sent from a controller to a switch we throw
 * a SwitchStateExeption.
 *
 * The more specific handlers can also throw SwitchStateExceptions
 *
 * @param h The OFChannelHandler that received the message
 * @param m The message we received.
 * @throws SwitchStateException
 * @throws IOException
 */
void processOFMessage(OFMessage m) {
	roleChanger.checkTimeout();
	switch(m.getType()) {
	case BARRIER_REPLY:
		processOFBarrierReply((OFBarrierReply) m);
		break;
	case ERROR:
		processOFError((OFErrorMsg) m);
		break;
	case FLOW_REMOVED:
		processOFFlowRemoved((OFFlowRemoved) m);
		break;
	case GET_CONFIG_REPLY:
		processOFGetConfigReply((OFGetConfigReply) m);
		break;
	case PACKET_IN:
		processOFPacketIn((OFPacketIn) m);
		break;
	case PORT_STATUS:
		processOFPortStatus((OFPortStatus) m);
		break;
	case QUEUE_GET_CONFIG_REPLY:
		processOFQueueGetConfigReply((OFQueueGetConfigReply) m);
		break;
	case STATS_REPLY:
		processOFStatsReply((OFStatsReply) m);
		break;
	case ROLE_REPLY:
		processOFRoleReply((OFRoleReply) m);
		break;
	case EXPERIMENTER:
		processOFExperimenter((OFExperimenter) m);
		break;
	case ROLE_STATUS:
		processOFRoleStatus((OFRoleStatus) m);
		break;
	default:
		illegalMessageReceived(m);
		break;
	}
}