Examples with TsLoopPacket org.onosproject.fnl.base.TsLoopPacket used on opensource projects

Example 1 with TsLoopPacket

use of org.onosproject.fnl.base.TsLoopPacket in project onos by opennetworkinglab.

the class DefaultCheckLoop method processOneOutputInstruction.

/**
 * Process one output instruction.
 *
 * Params are passed from processOneInstruction directly,
 * and obey the same rules.
 *
 * @param instOne the instruction to be processed
 * @param currentDeviceId id of the device we are now in
 * @param initPkt the packet before being copied
 * @param matchedPkt the packet which matched the flow entry,
 *                   to which this instruction belongs
 * @param isFindLoop indicate if it is invoked by findLoop method
 * @param firstEntry the flow entry from which the packet is generated
 * @return true, if a loop is discovered;
 *         false, 1. invoked by matchDeviceFlows method, and detected no loop;
 *                2. invoked by findLoop method
 */
private boolean processOneOutputInstruction(Instruction instOne, DeviceId currentDeviceId, TsLoopPacket initPkt, TsLoopPacket matchedPkt, boolean isFindLoop, FlowEntry firstEntry) {
    OutputInstruction instOutput = (OutputInstruction) instOne;
    PortNumber instPort = instOutput.port();
    if (!instPort.isLogical()) {
        // single OUTPUT - NIC or normal port
        Set<Link> dstLink = tsGetEgressLinks(new ConnectPoint(currentDeviceId, instPort));
        if (!dstLink.isEmpty()) {
            // TODO - now, just deal with the first destination.
            // will there be more destinations?
            Link dstThisLink = dstLink.iterator().next();
            ConnectPoint dstPoint = dstThisLink.dst();
            // check output to devices only (output to a host is normal)
            if (isDevice(dstPoint)) {
                PortCriterion oldInPort = updatePktInportPerHop(matchedPkt, dstPoint);
                matchedPkt.pushPathLink(dstThisLink);
                TsLoopPacket newNewPkt = matchedPkt.copyPacketMatch();
                boolean loopFound = matchDeviceFlows(dstPoint.deviceId(), newNewPkt);
                if (isFindLoop) {
                    if (loopFound) {
                        loops.add(newNewPkt);
                        updateExcludeDeviceSet(newNewPkt);
                    }
                    matchedPkt.resetLinkFlow(firstEntry);
                } else {
                    if (loopFound) {
                        initPkt.handInLoopMatch(newNewPkt);
                        return true;
                    }
                    matchedPkt.popPathLink();
                }
                restorePktInportPerHop(matchedPkt, oldInPort);
            }
        } else {
            if (!isFindLoop) {
                // TODO - NEED
                log.warn("no link connecting at device {}, port {}", currentDeviceId, instPort);
            }
        }
    } else if (instPort.equals(PortNumber.IN_PORT)) {
        // TODO - in the future,
        // we may need to resolve this condition 1
        log.warn("can not handle {} port now.", PortNumber.IN_PORT);
    } else if (instPort.equals(PortNumber.NORMAL) || instPort.equals(PortNumber.FLOOD) || instPort.equals(PortNumber.ALL)) {
        // TODO - in the future,
        // we may need to resolve this condition 2
        log.warn("can not handle {}/{}/{} now.", PortNumber.NORMAL, PortNumber.FLOOD, PortNumber.ALL);
    }
    return false;
}

Example 2 with TsLoopPacket

use of org.onosproject.fnl.base.TsLoopPacket in project onos by opennetworkinglab.

the class DefaultCheckLoop method findLoop.

/**
 * Enter of the loop checking algorithm.
 *
 * @return the set of loop results; empty, if there is no loop
 */
private Set<NetworkAnomaly> findLoop() {
    getNetworkSnapshot();
    loops = new HashSet<>();
    excludeDeviceId = new HashSet<>();
    for (Device device : accessDevices) {
        if (excludeDeviceId.contains(device.id())) {
            continue;
        }
        List<FlowEntry> availableFlowEntries = new ArrayList<>();
        flowEntryInfo.get(device.id()).forEach(flowEntry -> {
            if (flowEntry.state() == ADDED) {
                availableFlowEntries.add(flowEntry);
            }
        });
        List<FlowEntry> sortedFlowEntries = sortFlowTable(availableFlowEntries);
        for (FlowEntry flow : sortedFlowEntries) {
            TsLoopPacket pkt = matchBuilder(flow.selector().criteria(), null);
            pkt.pushPathFlow(flow);
            List<Instruction> inst = flow.treatment().immediate();
            for (Instruction instOne : inst) {
                // Attention !!!
                // if you would like to modify the code here,
                // please MAKE VERY SURE that you are clear with
                // the relationship of any invoked methods, and
                // the relationship of params which are passed in and out.
                processOneInstruction(instOne, device.id(), null, pkt, true, flow);
            }
        }
    }
    return loops;
}

Example 3 with TsLoopPacket

use of org.onosproject.fnl.base.TsLoopPacket in project onos by opennetworkinglab.

the class DefaultCheckLoop method matchDeviceFlows.

/**
 * Iterate one by one at switch hops.
 * Return whether we discover a Loop now or not.
 *
 * When flows form a loop,
 * pkt is also a return value indicating the loop header.
 *
 * @param deviceId the device needed to be checked
 * @param pkt virtual packet forwarded by switches
 * @return true if a loop is discovered
 */
private boolean matchDeviceFlows(DeviceId deviceId, TsLoopPacket pkt) {
    if (pkt.isPassedDevice(deviceId)) {
        // Attention: pkt should be held outside
        return true;
    }
    List<FlowEntry> availableFlowEntries = new ArrayList<>();
    flowEntryInfo.get(deviceId).forEach(flowEntry -> {
        if (flowEntry.state() == ADDED) {
            availableFlowEntries.add(flowEntry);
        }
    });
    List<FlowEntry> sortedFlowEntries = sortFlowTable(availableFlowEntries);
    for (FlowEntry flowEntry : sortedFlowEntries) {
        TsReturn<Boolean> isBigger = new TsReturn<>();
        TsLoopPacket newPkt = pkt.copyPacketMatch();
        if (!matchAndAddFlowEntry(flowEntry, newPkt, isBigger)) {
            continue;
        }
        newPkt.pushPathFlow(flowEntry);
        for (Instruction instOne : flowEntry.treatment().immediate()) {
            // the relationship of params which are passed in and out.
            if (processOneInstruction(instOne, deviceId, pkt, newPkt, false, null)) {
                return true;
            }
        }
        newPkt.popPathFlow();
        if (!isBigger.getValue()) {
            break;
        }
    }
    return false;
}