Creating a Java FlowMod for 1.3 DataPath

[RGBD]

If I have an OF 1.0 action that looks something like this:

Action action = ActionFactory.createAction( ProtocolVersion.V_1_0, ActionType.OUTPUT, Port.NORMAL  );

I have tried to create an Instruction for 1.3 but only get this far:

Instruction instruction = Instruction.createInstruction(ProtocolVersion.V_1_3, ...

I've lost my way in JavaDocs.

Could someone provide and example of an OF 1.3 FlowMod or point me in the correct direction?

[sdnindia]

Hello RGBD,

The following listing shows an example of how to create a flowmod message:

Flowmod Message Example:

public class SampleFlowModMessageCreation {

private static final ProtocolVersion PV = ProtocolVersion.V_1_3;

private static final long COOKIE = 0x00002468;

private static final TableId TABLE_ID = TableId.valueOf(200);

private static final int FLOW_IDLE_TIMEOUT = 300;

private static final int FLOW_HARD_TIMEOUT = 600;

private static final int FLOW_PRIORITY = 50;

private static final BufferId BUFFER_ID = BufferId.NO_BUFFER;

private static final Set<FlowModFlag> FLAGS = EnumSet.of(FlowModFlag.SEND_FLOW_REM, FlowModFlag.CHECK_OVERLAP, FlowModFlag.NO_BYTE_COUNTS);

private static final MacAddress MAC =MacAddress.valueOf("00001e:000000");

private static final MacAddress MAC_MASK =MacAddress.valueOf("ffffff:000000");

private static final PortNumber SMTP_PORT = PortNumber.valueOf(25);

private static final MacAddress MAC_DEST = MacAddress.BROADCAST;

private static final IpAddress IP_DEST = IpAddress.LOOPBACK_IPv4;

private OfmFlowMod sampleFlowModCreation() {

// Create a 1.3 FlowMod ADD message...

OfmMutableFlowMod fm = (OfmMutableFlowMod) MessageFactory.create(PV, MessageType.FLOW_MOD, FlowModCommand.ADD);

// NOTE: outPort = ANY and outGroup = ANY by default so we don’t have

// to explicitly set them.

fm.cookie(COOKIE).tableId(TABLE_ID).priority(FLOW_PRIORITY).idleTimeout(FLOW_IDLE_TIMEOUT).hardTimeout(FLOW_HARD_TIMEOUT).bufferId(BUFFER_ID).flowModFlags(FLAGS).match(createMatch());

for (Instruction ins: createInstructions())

fm.addInstruction(ins);

return (OfmFlowMod) fm.toImmutable();

}

private Match

createMatch() {

// NOTE static imports of:

//

com.hp.of.lib.match.FieldFactory.createBasicField;

//

com.hp.of.lib.match.OxmBasicFieldType.*;

MutableMatch mm = MatchFactory.createMatch(PV).addField(createBasicField(PV, ETH_SRC, MAC, MAC_MASK)).addField(createBasicField(PV, ETH_TYPE, EthernetType.IPv4)).addField(createBasicField(PV, IP_PROTO, IpProtocol.TCP)).addField(createBasicField(PV, TCP_DST, SMTP_PORT));

return (Match) mm.toImmutable();

}

private static final long INS_META_MASK = 0xffff0000;

private static final long INS_META_DATA = 0x33ab0000;

private List<Instruction> createInstructions() {

// NOTE static imports of:

// com.hp.of.lib.instr.ActionFactory.createAction;

// com.hp.of.lib.instr.ActionFactory.createActionSetField;

// com.hp.of.lib.instr.InstructionFactory.createInstruction;

//

com.hp.of.lib.instr.InstructionFactory.createMutableInstruction;

List<Instruction> result = new ArrayList<Instruction>();

result.add(createInstruction(PV, InstructionType.WRITE_METADATA,INS_META_DATA, INS_META_MASK));

InstrMutableAction apply = createMutableInstruction(PV,InstructionType.APPLY_ACTIONS);

apply.addAction(createAction(PV, ActionType.DEC_NW_TTL)).addAction(createActionSetField(PV, ETH_DST, MAC_DEST)).addAction(createActionSetField(PV, IPV4_DST, IP_DEST));

result.add((Instruction) apply.toImmutable());

return result;

}

}

This is an example for  FlowMOD  message  in the SDN Programming guide. [page 27-29]

Please follow the example and let us know if you still face the issue.

Thanks,

HP SDN Team

[sdnindia]

Hi RGBD,

Doing a follow up to see if previous post helps you.

Please let us know if your problem is solved or you still have some problem.

Thanks,

HP SDN Team

[Dast]

Hi everyone! 

How do I send the FlowMod message? 

I tried it with the ControllerService.sendFlowMod method

MessageFuture sendFlowMod(OfmFlowMod flowMod,
                        DataPathId dpid)
                          throws OpenflowException

but I always get the follogwing error:

ERROR of-io-29-thread-6  hp.of.ctl   Unable to perform I/O java.lang.NoSuchMethodError: com.hp.of.ctl.ControllerService.sendFlowMod(Lcom/hp/of/lib/msg/OfmFlowMod;Lcom/hp/of/lib/dt/DataPathId;)Lcom/hp/of/lib/msg/MessageFuture;

The necessary jars are referenced in the projects pom.xml and the ControllerService seems to be bound as I can add a PacketListener. 

Does anybody have an idea where the problem is?

[sdnindia]

Hello Dast,

Below are the steps to send the FlowMod message-

// Construct OfmMutableFlowMod 

OfmMutableFlowMod mod = (OfmMutableFlowMod) MessageFactory .create(pv, MessageType.FLOW_MOD);

// Assemble the match fields

// Add the values to flow mod

//Convert to Immutable

OfmFlowMod flow = (OfmFlowMod)mod.toImmutable();

…

//Call the method

cs.sendFlowMod(flow, dpInfo.dpid());     // Here dpInfo is of type DataPathInfo and cs is of type ControllerService

Please let us know if this helps .

Thanks,

HP SDN Team

[Yuanxiance]

i have a problem. copy your above code, sdn-apidoc.2.0.0 API web page tell us the function "sendFlowMod" should have return "MessageFuture" type! But my code return null!!!!!!! what's the problem? please help me quickly,thks!!!