SDN開發之基於floodlight控制器做QoS策略
－－－溫州大學 12網絡工程
在floodlight中寫主要策略。通過Python腳本與ubuntu console界面交互
利用floodlight提供的restAPI開發webUI界面
Java部分代碼：
package net.floodlightcontroller.qos;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import org.openflow.protocol.OFFlowMod;
import org.openflow.protocol.OFMatch;
import org.openflow.protocol.OFMessage;
import org.openflow.protocol.OFPacketOut;
import org.openflow.protocol.OFPort;
import org.openflow.protocol.OFType;
import org.openflow.protocol.action.OFAction;
import org.openflow.protocol.action.OFActionEnqueue;
import org.openflow.protocol.action.OFActionNetworkTypeOfService;
import org.openflow.protocol.action.OFActionType;
import org.openflow.util.HexString;
import net.floodlightcontroller.core.FloodlightContext;
import net.floodlightcontroller.core.IOFMessageListener;
import net.floodlightcontroller.core.IOFSwitch;
import net.floodlightcontroller.core.module.FloodlightModuleContext;
import net.floodlightcontroller.core.module.FloodlightModuleException;
import net.floodlightcontroller.core.module.IFloodlightModule;
import net.floodlightcontroller.core.module.IFloodlightService;
import net.floodlightcontroller.restserver.IRestApiService;
import net.floodlightcontroller.staticflowentry.IStaticFlowEntryPusherService;
import net.floodlightcontroller.storage.IResultSet;
import net.floodlightcontroller.storage.IStorageSourceService;
import net.floodlightcontroller.storage.StorageException;
import net.floodlightcontroller.qos.QoSPolicy;
import net.floodlightcontroller.qos.QoSTypeOfService;
import net.floodlightcontroller.core.IFloodlightProviderService;
import java.util.ArrayList;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class QoS implements IQoSService, IFloodlightModule,
IOFMessageListener {
protected IFloodlightProviderService floodlightProvider;
protected IStaticFlowEntryPusherService flowPusher;
protected List<QoSPolicy> policies; //Synchronized
protected List<QoSTypeOfService> services; //Synchronized
protected IRestApiService restApi;
protected FloodlightContext cntx;
protected IStorageSourceService storageSource;
protected Properties props = new Properties();
protected String[] tools;
protected static Logger logger;
protected boolean enabled;
protected String dpidPattern = "^[\\d|\\D][\\d|\\D]:[\\d|\\D][\\d|\\D]:" +
"[\\d|\\D][\\d|\\D]:[\\d|\\D][\\d|\\D]:" +
"[\\d|\\D][\\d|\\D]:[\\d|\\D][\\d|\\D]:" +
"[\\d|\\D][\\d|\\D]:[\\d|\\D][\\d|\\D]$";
public static final String TABLE_NAME = "controller_qos";
public static final String COLUMN_POLID = "policyid";
public static final String COLUMN_NAME = "name";
public static final String COLUMN_MATCH_PROTOCOL = "protocol";
public static final String COLUMN_MATCH_ETHTYPE = "eth-type";
public static final String COLUMN_MATCH_INGRESSPRT = "ingressport";
public static final String COLUMN_MATCH_IPDST = "ipdst";
public static final String COLUMN_MATCH_IPSRC = "ipsrc";
public static final String COLUMN_MATCH_VLANID = "vlanid";
public static final String COLUMN_MATCH_ETHSRC = "ethsrc";
public static final String COLUMN_MATCH_ETHDST = "ethdst";
public static final String COLUMN_MATCH_TCPUDP_SRCPRT = "tcpudpsrcport";
public static final String COLUMN_MATCH_TCPUDP_DSTPRT = "tcpudpdstport";
public static final String COLUMN_NW_TOS = "nw_tos";
public static final String COLUMN_SW = "switches";
public static final String COLUMN_QUEUE = "queue";
public static final String COLUMN_ENQPORT = "equeueport";
public static final String COLUMN_PRIORITY = "priority";
public static final String COLUMN_SERVICE = "service";
public static String ColumnNames[] = { COLUMN_POLID,
COLUMN_NAME,COLUMN_MATCH_PROTOCOL, COLUMN_MATCH_ETHTYPE,COLUMN_MATCH_INGRESSPRT,
COLUMN_MATCH_IPDST,COLUMN_MATCH_IPSRC,COLUMN_MATCH_VLANID,
COLUMN_MATCH_ETHSRC,COLUMN_MATCH_ETHDST,COLUMN_MATCH_TCPUDP_SRCPRT,
COLUMN_MATCH_TCPUDP_DSTPRT,COLUMN_NW_TOS,COLUMN_SW,
COLUMN_QUEUE,COLUMN_ENQPORT,COLUMN_PRIORITY,COLUMN_SERVICE,};
public static final String TOS_TABLE_NAME = "controller_qos_tos";
public static final String COLUMN_SID = "serviceid";
public static final String COLUMN_SNAME = "servicename";
public static final String COLUMN_TOSBITS = "tosbits";
public static String TOSColumnNames[] = {COLUMN_SID,
COLUMN_SNAME,
COLUMN_TOSBITS};
@Override
public String getName() {
return "qos";
}
@Override
public boolean isCallbackOrderingPrereq(OFType type, String name) {
return false;
}
@Override
public boolean isCallbackOrderingPostreq(OFType type, String name) {
return false;
}
@Override
public Collection<Class<? extends IFloodlightService>> getModuleServices() {
Collection<Class<? extends IFloodlightService>> l =
new ArrayList<Class<? extends IFloodlightService>>();
l.add(IQoSService.class);
return l;
}
@Override
public Map<Class<? extends IFloodlightService>, IFloodlightService> getServiceImpls() {
Map<Class<? extends IFloodlightService>,
IFloodlightService> m =
new HashMap<Class<? extends IFloodlightService>,
IFloodlightService>();
// We are the class that implements the service
m.put(IQoSService.class, this);
return m;
}
@Override
public Collection<Class<? extends IFloodlightService>> getModuleDependencies() {
//This module should depend on FloodlightProviderService,
// IStorageSourceProviderService, IRestApiService, &
// IStaticFlowEntryPusherService
Collection<Class<? extends IFloodlightService>> l =
new ArrayList<Class<? extends IFloodlightService>>();
l.add(IFloodlightProviderService.class);
l.add(IStorageSourceService.class);
l.add(IRestApiService.class);
l.add(IStaticFlowEntryPusherService.class);
return l;
}
protected ArrayList<QoSPolicy> readPoliciesFromStorage() {
ArrayList<QoSPolicy> l = new ArrayList<QoSPolicy>();
try{
Map<String, Object> row;
IResultSet policySet = storageSource
.executeQuery(TABLE_NAME, ColumnNames, null, null );
for( Iterator<IResultSet> iter = policySet.iterator(); iter.hasNext();){
row = iter.next().getRow();
QoSPolicy p = new QoSPolicy();
if(!row.containsKey(COLUMN_POLID)
|| !row.containsKey(COLUMN_SW)
|| !row.containsKey(COLUMN_QUEUE)
|| !row.containsKey(COLUMN_ENQPORT)
|| !row.containsKey(COLUMN_SERVICE)){
logger.error("Skipping entry with required fields {}", row);
continue;
}
try{
p.policyid = Integer.parseInt((String) row.get(COLUMN_POLID));
p.queue = Short.parseShort((String) row.get(COLUMN_QUEUE));
p.enqueueport = Short.parseShort((String) row.get(COLUMN_ENQPORT));
p.service = (String) row.get(COLUMN_SERVICE);
//TODO change for String[] of switches
p.sw = (String) row.get(COLUMN_SW);
for(String key: row.keySet()){
if(row.get(key) == null){
continue;
}
else if(key.equals(COLUMN_POLID)
|| key.equals(COLUMN_SW)
|| key.equals(COLUMN_QUEUE)
|| key.equals(COLUMN_ENQPORT)
|| key.equals(COLUMN_SERVICE)){
continue;
}
else if(key.equals(COLUMN_NAME)){
p.name = (String) row.get(COLUMN_NAME);
}
else if(key.equals(COLUMN_MATCH_ETHDST)){
p.ethdst = (String) row.get(COLUMN_MATCH_ETHDST);
}
else if(key.equals(COLUMN_MATCH_ETHSRC)){
p.ethsrc = (String) row.get(COLUMN_MATCH_ETHSRC);
}
else if(key.equals(COLUMN_MATCH_ETHTYPE)){
p.ethtype = Short.parseShort((String)
row.get(COLUMN_MATCH_ETHTYPE));
}
else if(key.equals(COLUMN_MATCH_INGRESSPRT)){
p.ingressport = Short.parseShort((String)
row.get(COLUMN_MATCH_INGRESSPRT));
}
else if(key.equals(COLUMN_MATCH_IPDST)){
p.ipdst = Integer.parseInt((String)
row.get(COLUMN_MATCH_IPDST));
}
else if(key.equals(COLUMN_MATCH_IPSRC)){
p.ipsrc = Integer.parseInt((String)
row.get(COLUMN_MATCH_IPSRC));
}
else if(key.equals(COLUMN_MATCH_PROTOCOL)){
p.protocol = Byte.parseByte((String)
row.get(COLUMN_MATCH_PROTOCOL));
}
else if(key.equals(COLUMN_MATCH_TCPUDP_DSTPRT)){
p.tcpudpdstport = Short.parseShort((String)
row.get(COLUMN_MATCH_TCPUDP_DSTPRT));
}
else if(key.equals(COLUMN_MATCH_TCPUDP_SRCPRT)){
p.tcpudpsrcport = Short.parseShort((String)
row.get(COLUMN_MATCH_TCPUDP_SRCPRT));
}
else if(key.equals(COLUMN_MATCH_VLANID)){
p.vlanid = Short.parseShort((String)
row.get(COLUMN_MATCH_VLANID));
}
else if(key.equals(COLUMN_NW_TOS)){
p.tos = Byte.parseByte((String)
row.get(COLUMN_NW_TOS));
}
else if(key.equals(COLUMN_PRIORITY)){
p.priority = Short.parseShort((String)
row.get(COLUMN_PRIORITY));
}
}
}catch(ClassCastException e){
logger.error("Error, Skipping rule, Bad Data "
+ e.getMessage()+" on Rule {}", p.policyid);
}
//make sure its a queueing rule or service rule only.
if(p.enqueueport != -1 && p.queue != -1 && p.service != null){
l.add(p);
}
else if(p.enqueueport > -1 && p.queue > -1 && p.service == null){
l.add(p);
}
else{
continue;//not a valid rule
}
}
}catch(StorageException e){
logger.error("Error with storage source: {}", e);
}
Collections.sort(l);
return l;
}
protected ArrayList<QoSTypeOfService> readServicesFromStorage() {
ArrayList<QoSTypeOfService> l = new ArrayList<QoSTypeOfService>();
try{
Map<String, Object> row;
IResultSet serviceSet = storageSource
.executeQuery(TOS_TABLE_NAME, TOSColumnNames, null, null );
for( Iterator<IResultSet> iter = serviceSet.iterator(); iter.hasNext();){
row = iter.next().getRow();
QoSTypeOfService s = new QoSTypeOfService();
if(!row.containsKey(COLUMN_SID)
|| !row.containsKey(COLUMN_TOSBITS)){
logger.error("Skipping entry with required fields {}", row);
continue;
}
try{
s.sid = Integer.parseInt((String) row.get(COLUMN_SID));
s.tos = Byte.parseByte((String) row.get(COLUMN_TOSBITS));
for(String key: row.keySet()){
if(row.get(key) == null){
continue;
}
else if(key.equals(COLUMN_SID)
|| key.equals(COLUMN_TOSBITS)){
continue;
}
else if(key.equals(COLUMN_SNAME)){
s.name = (String) row.get(COLUMN_SNAME);
}
}
}catch(ClassCastException e){
logger.error("Error, Skipping rule, Bad Data "
+ e.getMessage()+" on Rule {}", s.sid);
}
if(s.tos != -1){
l.add(s);
}
}
}catch(StorageException e){
logger.error("Error with storage source: {}", e);
}
Collections.sort(l);
return l;
}
@Override
public void init(FloodlightModuleContext context)
throws FloodlightModuleException {
//initiate services
floodlightProvider = context.getServiceImpl(IFloodlightProviderService.class);
flowPusher = context.getServiceImpl(IStaticFlowEntryPusherService.class);
logger = LoggerFactory.getLogger(QoS.class);
storageSource = context.getServiceImpl(IStorageSourceService.class);
restApi = context.getServiceImpl(IRestApiService.class);
policies = new ArrayList<QoSPolicy>();
services = new ArrayList<QoSTypeOfService>();
logger = LoggerFactory.getLogger(QoS.class);
// start disabled
// can be overridden by tools.properties.
enabled = false;
try {
//load a properties file
props.load(new FileInputStream("src/main/resources/tools.properties"));
tools = props.getProperty("tools").split(",");
System.out.println(props.getProperty("qos"));
if(props.getProperty("qos").equalsIgnoreCase("enabled")){
logger.info("Enabling QoS on Start-up. Edit tools.properties to change this.");
this.enableQoS(true);
}
}catch (FileNotFoundException e) {
e.printStackTrace();
} catch(IOException e) {
e.printStackTrace();
}
}
@Override
public void startUp(FloodlightModuleContext context) {
// initialize REST interface
restApi.addRestletRoutable(new QoSWebRoutable());
floodlightProvider.addOFMessageListener(OFType.PACKET_IN, this);
//Storage for policies
storageSource.createTable(TABLE_NAME, null);
storageSource.setTablePrimaryKeyName(TABLE_NAME, COLUMN_POLID);
//avoid thread issues for concurrency
synchronized (policies) {
this.policies = readPoliciesFromStorage();
}
//Storage for services
storageSource.createTable(TOS_TABLE_NAME, null);
storageSource.setTablePrimaryKeyName(TOS_TABLE_NAME, COLUMN_SID);
//avoid thread issues for concurrency
synchronized (services) {
this.services = readServicesFromStorage();
}
// create default "Best Effort" service
// most networks use this as default, adding here for defaulting
try{
QoSTypeOfService service = new QoSTypeOfService();
service.name = "Best Effort";
service.tos = (byte)0x00;
service.sid = service.genID();
this.addService(service);
}catch(Exception e){
logger.error("Error adding default Best Effort {}", e);
}
}
@Override
public net.floodlightcontroller.core.IListener.Command receive(
IOFSwitch sw, OFMessage msg, FloodlightContext cntx) {
//do not process packet if not enabled
if (!this.enabled) {
return Command.CONTINUE;
}
//logger.debug("Message Recieved: Type - {}",msg.getType().toString());
//Listen for Packets that match Policies
switch (msg.getType()) {
case PACKET_IN:
//logger.debug("PACKET_IN recieved");
byte[] packetData = OFMessage.getData(sw, msg, cntx);
//Temporary match from packet to compare
OFMatch tmpMatch = new OFMatch();
tmpMatch.loadFromPacket(packetData, OFPort.OFPP_NONE.getValue());
checkIfQoSApplied(tmpMatch);
break;
default:
return Command.CONTINUE;
}
return Command.CONTINUE;
}
/**
* Allow access to enable module
* @param boolean
*/
@Override
public void enableQoS(boolean enable) {
logger.info("Setting QoS to {}", enable);
this.enabled = enable;
}
/**
* Return whether of not the module is enabled
*/
@Override
public boolean isEnabled(){
return this.enabled;
}
/**
* Return a List of Quality of Service Policies
*/
@Override
public List<QoSPolicy> getPolicies() {
return this.policies;
}
/**
* Returns a list of services available for Network Type of Service
* @return List
*/
@Override
public List<QoSTypeOfService> getServices() {
return this.services;
}
/**
* Add a service class to use in policies
* Used to make ToS/DiffServ Bits human readable.
* Bit notation 000000 becomes "Best Effort"
* @param QoSTypeOfService
*/
@Override
public synchronized void addService(QoSTypeOfService service) {
//debug
logger.debug("Adding Service to List and Storage");
//create the UID
service.sid = service.genID();
//check tos bits are within bounds
if (service.tos >= (byte)0x00 && service.tos <= (byte)0x3F ){
try{
//Add to the list of services
//un-ordered, naturally a short list
this.services.add(service);
//add to the storage source
Map<String, Object> serviceEntry = new HashMap<String,Object>();
serviceEntry.put(COLUMN_SID, Integer.toString(service.sid));
serviceEntry.put(COLUMN_SNAME, service.name);
serviceEntry.put(COLUMN_TOSBITS, Byte.toString(service.tos));
//ad to storage
storageSource.insertRow(TOS_TABLE_NAME, serviceEntry);
}catch(Exception e){
logger.debug("Error adding service, error: {}" ,e);
}
}
else{
logger.debug("Type of Service must be 0-64");
}
}
/**
* Removes a Network Type of Service
* @category by sid
*/
@Override
public synchronized void deleteService(int sid) {
Iterator<QoSTypeOfService> sIter = this.services.iterator();
while(sIter.hasNext()){
QoSTypeOfService s = sIter.next();
if(s.sid == sid){
sIter.remove();
break; //done only one can exist
}
}
}
@Override
public synchronized void addPolicy(QoSPolicy policy){
//debug
logger.debug("Adding Policy to List and Storage");
//create the UID
policy.policyid = policy.genID();
int p = 0;
for (p = 0; p < this.policies.size(); p++){
//check if empy
if(this.policies.isEmpty()){
//p is zero
break;
}
//starts at the first(lowest) policy based on priority
//insertion sort, gets hairy when n # of switches increases.
//larger networks may need a merge sort.
if(this.policies.get(p).priority >= policy.priority){
//this keeps "p" in the correct position to place new policy in
break;
}
}
if (p <= this.policies.size()) {
this.policies.add(p, policy);
}
else {
this.policies.add(policy);
}
//Add to the storageSource
Map<String, Object> policyEntry = new HashMap<String, Object>();
policyEntry.put(COLUMN_POLID, Long.toString(policy.policyid));
policyEntry.put(COLUMN_NAME, policy.name);
policyEntry.put(COLUMN_MATCH_PROTOCOL, Short.toString(policy.protocol));
policyEntry.put(COLUMN_MATCH_ETHTYPE, Short.toString(policy.ethtype));
policyEntry.put(COLUMN_MATCH_INGRESSPRT, Short.toString(policy.ingressport));
policyEntry.put(COLUMN_MATCH_IPSRC, Integer.toString(policy.ipsrc));
policyEntry.put(COLUMN_MATCH_IPDST, Integer.toBinaryString(policy.ipdst));
policyEntry.put(COLUMN_MATCH_VLANID, Short.toString(policy.vlanid));
policyEntry.put(COLUMN_MATCH_ETHSRC, policy.ethsrc);
policyEntry.put(COLUMN_MATCH_ETHDST, policy.ethdst);
policyEntry.put(COLUMN_MATCH_TCPUDP_SRCPRT, Short.toString(policy.tcpudpsrcport));
policyEntry.put(COLUMN_MATCH_TCPUDP_DSTPRT, Short.toString(policy.tcpudpdstport));
policyEntry.put(COLUMN_NW_TOS, policy.service);
policyEntry.put(COLUMN_SW, policy.sw);
policyEntry.put(COLUMN_QUEUE, Short.toString(policy.queue));
policyEntry.put(COLUMN_ENQPORT, Short.toString(policy.enqueueport));
policyEntry.put(COLUMN_PRIORITY, Short.toString(policy.priority));
policyEntry.put(COLUMN_SERVICE, policy.service);
storageSource.insertRow(TABLE_NAME, policyEntry);
/**
* TODO Morph this to use a String[] of switches
**/
if (policy.sw.equals("all")){
logger.debug("Adding Policy {} to Entire Network", policy.toString());
addPolicyToNetwork(policy);
}
/** [NOTE] Note utilized yet, future revision used to "save" policies
* to the controller, then modified to be added to switched **/
else if (policy.sw.equals("none")){
logger.debug("Adding Policy {} to Controller", policy.toString());
}
//add to a specified switch b/c "all" not specified
else if(policy.sw.matches(dpidPattern)){
logger.debug("Adding policy {} to Switch {}", policy.toString(), policy.sw);
// add appropriate hex string converted to a long type
addPolicy(policy, policy.sw);
}
else{
logger.error("***Policy {} error at switch input {} ***" +
"", policy.toString(), policy.sw);
}
}
/**
* Add a policy-flowMod to all switches in network
* @param policy
*/
@Override
public void addPolicyToNetwork(QoSPolicy policy) {
OFFlowMod flow = policyToFlowMod(policy);
logger.info("adding policy-flow {} to all switches",flow.toString());
//add to all switches
Map<Long, IOFSwitch> switches = floodlightProvider.getSwitches();
//simple check
if(!(switches.isEmpty())){
for(IOFSwitch sw : switches.values()){
if(!(sw.isConnected())){
break;// cannot add
}
logger.info("Add flow Name: {} Flow: {} Switch "+ sw.getStringId(),
policy.name, flow.toString());
//add unique flow names based on dpid hasCode :)
flowPusher.addFlow(policy.name+Integer
.toString(sw.getStringId()
.hashCode()), flow, sw.getStringId());
}
}
}
/**
* Adds a policy to a switch (dpid)
* @param QoSPolicy policy
* @param String sw
*/
//This will change to list sws[]
//of switches, including a single sw
@Override
public void addPolicy(QoSPolicy policy, String swid) {
//get the flowmod
OFFlowMod flow = policyToFlowMod(policy);
logger.info("Adding policy-flow {} to switch {}",flow.toString(),swid);
//add unique flow names based on dpid hasCode :)
flowPusher.addFlow(policy.name+Integer
.toString(swid.hashCode()), flow, swid);
}
/**
* Removes a policy from entire network
* @param policy
*/
@Override
public void deletePolicyFromNetwork(String policyName) {
//all switches
Map<Long, IOFSwitch> switches = floodlightProvider.getSwitches();
//simple check
if(!(switches.isEmpty())){
for(IOFSwitch sw : switches.values()){
if(!(sw.isConnected())){
break;// cannot add
}
logger.debug("{} has {}",sw.getStringId(),flowPusher.getFlows());
flowPusher.deleteFlow(policyName+Integer
.toString(sw.getStringId().hashCode()));
}
}
}
@Override
public synchronized void deletePolicy(QoSPolicy policy){
logger.info("Deleting policy {} attached to switches: {}", policy.name, policy.sw);
//dont have to catch policy.sw == "non" just delete it
if(policy.sw.equalsIgnoreCase("none")){logger.info("policy match no switches, removeing from storage");}
else if(policy.sw.equalsIgnoreCase("all")){
logger.info("Delete flows from network!");
deletePolicyFromNetwork(policy.name);
}
else if(policy.sw.matches(dpidPattern)){
deletePolicy(policy.sw, policy.name);
}
else{
logger.error("Error!, Unrecognized switches! Switch is : {}",policy.sw);
}
//remove from storage
Iterator<QoSPolicy> sIter = this.policies.iterator();
while(sIter.hasNext()){
QoSPolicy p = sIter.next();
if(p.policyid == policy.policyid){
sIter.remove();
break; //done only one can exist
}
}
}
/**
* Delete policy from a switch (dpid)
* @param policyid
* @param sw
* @throws
*/
//This will change to list sws[]
//of switches, including a single sw
@Override
public void deletePolicy(String switches, String policyName){
//TODO Morph this to use a String[] of switches
IOFSwitch sw = floodlightProvider.getSwitches()
.get(HexString.toLong(switches));
if(sw != null){
assert(sw.isActive());
}
// delete flow based on hasCode
flowPusher.deleteFlow(policyName+sw.getStringId().hashCode());
}
/**
* Returns a flowmod from a policy
* @param policy
* @return
*/
public OFFlowMod policyToFlowMod(QoSPolicy policy){
//initialize a match structure that matches everything
OFMatch match = new OFMatch();
//Based on the policy match appropriately.
//no wildcards
match.setWildcards(0);
if(policy.ethtype != -1){
match.setDataLayerType((policy.ethtype));
//logger.debug("setting match on eth-type");
}
if(policy.protocol != -1){
match.setNetworkProtocol(policy.protocol);
//logger.debug("setting match on protocol ");
}
if(policy.ingressport != -1){
match.setInputPort(policy.ingressport);
//logger.debug("setting match on ingress port ");
}
if(policy.ipdst != -1){
match.setNetworkDestination(policy.ipdst);
//logger.debug("setting match on network destination");
}
if(policy.ipsrc != -1){
match.setNetworkSource(policy.ipsrc);
//logger.debug("setting match on network source");
}
if(policy.vlanid != -1){
match.setDataLayerVirtualLan(policy.vlanid);
//logger.debug("setting match on VLAN");
}
if(policy.tos != -1){
match.setNetworkTypeOfService(policy.tos);
//logger.debug("setting match on ToS");
}
if(policy.ethsrc != null){
match.setDataLayerSource(policy.ethsrc);
//logger.debug("setting match on data layer source");
}
if(policy.ethdst != null){
match.setDataLayerDestination(policy.ethdst);
//logger.debug("setting match on data layer destination");
}
if(policy.tcpudpsrcport != -1){
match.setTransportSource(policy.tcpudpsrcport);
//logger.debug("setting match on transport source port");
}
if(policy.tcpudpdstport != -1){
match.setTransportDestination(policy.tcpudpdstport);
//logger.debug("setting match on transport destination");
}
//Create a flow mod using the previous match structure
OFFlowMod fm = new OFFlowMod();
fm.setType(OFType.FLOW_MOD);
//depending on the policy nw_tos or queue the flow mod
// will change the type of service bits or enqueue the packets
if(policy.queue > -1 && policy.service == null){
logger.info("This policy is a queuing policy");
List<OFAction> actions = new ArrayList<OFAction>();
//add the queuing action
OFActionEnqueue enqueue = new OFActionEnqueue();
enqueue.setLength((short) 0xffff);
enqueue.setType(OFActionType.OPAQUE_ENQUEUE); // I think this happens anyway in the constructor
enqueue.setPort(policy.enqueueport);
enqueue.setQueueId(policy.queue);
actions.add((OFAction) enqueue);
logger.info("Match is : {}", match.toString());
//add the matches and actions and return
fm.setMatch(match)
.setActions(actions)
.setIdleTimeout((short) 0) // infinite
.setHardTimeout((short) 0) // infinite
.setBufferId(OFPacketOut.BUFFER_ID_NONE)
.setFlags((short) 0)
.setOutPort(OFPort.OFPP_NONE.getValue())
.setPriority(policy.priority)
.setLengthU((short)OFFlowMod.MINIMUM_LENGTH + OFActionEnqueue.MINIMUM_LENGTH);
}
else if(policy.queue == -1 && policy.service != null){
logger.info("This policy is a type of service policy");
List<OFAction> actions = new ArrayList<OFAction>();
//add the queuing action
OFActionNetworkTypeOfService tosAction = new OFActionNetworkTypeOfService();
tosAction.setType(OFActionType.SET_NW_TOS);
tosAction.setLength((short) 0xffff);
//Find the appropriate type of service bits in policy
Byte pTos = null;
List<QoSTypeOfService> serviceList = this.getServices();
for(QoSTypeOfService s : serviceList){
if(s.name.equals(policy.service)){
//policy's service ToS bits
pTos = s.tos;
}
}
tosAction.setNetworkTypeOfService(pTos);
actions.add((OFAction)tosAction);
logger.info("Match is : {}", match.toString());
//add the matches and actions and return.class.ge
fm.setMatch(match)
.setActions(actions)
.setIdleTimeout((short) 0) // infinite
.setHardTimeout((short) 0) // infinite
.setBufferId(OFPacketOut.BUFFER_ID_NONE)
.setFlags((short) 0)
.setOutPort(OFPort.OFPP_NONE.getValue())
.setPriority(Short.MAX_VALUE)
.setLengthU((short)OFFlowMod.MINIMUM_LENGTH + OFActionNetworkTypeOfService.MINIMUM_LENGTH);
}
else{
logger.error("Policy Misconfiguration");
}
return fm;
}
/**
* Logs which, if any QoS is applied to PACKET_IN
* @param tmpMatch
* @throws IOException
*/
private void checkIfQoSApplied(OFMatch tmpMatch){
List<QoSPolicy> pols = this.getPolicies();
//policies dont apply to wildcards, (yet)
if (!pols.isEmpty()){
for(QoSPolicy policy : pols){
OFMatch m = new OFMatch();
m = policyToFlowMod(policy).getMatch();
//check
if (tmpMatch.equals(m)){
logger.info("PACKET_IN matched, Applied QoS Policy {}",policy.toString());
}
//Commented out checks, annoying in console log. For debug I'll leave though.
//else{
// logger.debug("Pass, no match on PACKET_IN");
//}
}
}//else{logger.info("No Policies to Check Against PACKET_IN");}
}
}
python包寫在floodlight/apps/目錄裏面
以下是一些基於python腳本命令：
寫qos策略到ovs中
sudo ovs-vsctl -- set port s1-eth1 qos=@defaultqos -- set port s1-eth2 qos=@defaultqos -- --id=@defaultqos create qos type=Linux-htb other-config:max-rate=1000000000 queues=0=@q0,1=@q1,2=@q2 -- --id=@q0 create queue other-config:min-rate=1000000000 other-config:max-rate=1000000000 -- --id=@q1 create queue other-config:max-rate=20000000 -- --id=@q2 create queue other-config:max-rate=2000000 other-config:mix-rate=200000
查看qos策略：
ovs-vsctl list qos
ovs-vsctl list queue
cat qos-state.json
命名一條實際的qos：
./qospath2.py -a --name 2Mbps01-02 -S 10.0.0.1 -D 10.0.0.2 -J'{"eth-type":"0x0800","protocol":"6","queue":"2"}'
刪除一條策略：
./qospath2.py -d -N 22Mbps01-02
在mininet中的測試命令：
iperf -s
iperf -c
在網頁上顯示qos policy:
未加入qos policy之前（上圖）：
加入限制流量爲2M之後(當然這個數值可以隨便改)：
