Examples with PIM org.onlab.packet.PIM used on opensource projects

Example 1 with PIM

use of org.onlab.packet.PIM in project onos by opennetworkinglab.

the class PimInterface method processHello.

/**
 * Process an incoming PIM Hello message.  There are a few things going on in
 * this method:
 * <ul>
 *     <li>We <em>may</em> have to create a new neighbor if one does not already exist</li>
 *     <li>We <em>may</em> need to re-elect a new DR if new information is received</li>
 *     <li>We <em>may</em> need to send an existing neighbor all joins if the genid changed</li>
 *     <li>We will refresh the neighbor's timestamp</li>
 * </ul>
 *
 * @param ethPkt the Ethernet packet header
 */
public void processHello(Ethernet ethPkt) {
    if (log.isTraceEnabled()) {
        log.trace("Received a PIM hello packet");
    }
    // We'll need to save our neighbors MAC address
    MacAddress nbrmac = ethPkt.getSourceMAC();
    // And we'll need to save neighbors IP Address.
    IPv4 iphdr = (IPv4) ethPkt.getPayload();
    IpAddress srcip = IpAddress.valueOf(iphdr.getSourceAddress());
    PIM pimhdr = (PIM) iphdr.getPayload();
    if (pimhdr.getPimMsgType() != PIM.TYPE_HELLO) {
        log.error("process Hello has received a non hello packet type: " + pimhdr.getPimMsgType());
        return;
    }
    // get the DR values for later calculation
    PimNeighbor dr = pimNeighbors.get(drIpaddress);
    checkNotNull(dr);
    IpAddress drip = drIpaddress;
    int drpri = dr.priority();
    // Assume we do not need to run a DR election
    boolean reElectDr = false;
    boolean genidChanged = false;
    PIMHello hello = (PIMHello) pimhdr.getPayload();
    // Determine if we already have a PIMNeighbor
    PimNeighbor nbr = pimNeighbors.getOrDefault(srcip, null);
    PimNeighbor newNbr = PimNeighbor.createPimNeighbor(srcip, nbrmac, hello.getOptions().values());
    if (nbr == null) {
        pimNeighbors.putIfAbsent(srcip, newNbr);
        nbr = newNbr;
    } else if (!nbr.equals(newNbr)) {
        if (newNbr.holdtime() == 0) {
            // Neighbor has shut down. Remove them and clean up
            pimNeighbors.remove(srcip, nbr);
            return;
        } else {
            // Neighbor has changed one of their options.
            pimNeighbors.put(srcip, newNbr);
            nbr = newNbr;
        }
    }
    // Refresh this neighbor's timestamp
    nbr.refreshTimestamp();
    /*
         * the election method will first determine if an election
         * needs to be run, if so it will run the election.  The
         * IP address of the DR will be returned.  If the IP address
         * of the DR is different from what we already have we know a
         * new DR has been elected.
         */
    IpAddress electedIp = election(nbr, drip, drpri);
    if (!drip.equals(electedIp)) {
        // we have a new DR.
        drIpaddress = electedIp;
    }
}

Example 2 with PIM

use of org.onlab.packet.PIM in project onos by opennetworkinglab.

the class PimPacketHandler method processPacket.

/**
 * Sanitize and process the packet.
 * TODO: replace ConnectPoint with PIMInterface when PIMInterface has been added.
 *
 * @param ethPkt the packet starting with the Ethernet header.
 * @param pimi the PIM Interface the packet arrived on.
 */
public void processPacket(Ethernet ethPkt, PimInterface pimi) {
    checkNotNull(ethPkt);
    checkNotNull(pimi);
    // Sanitize the ethernet header to ensure it is IPv4.  IPv6 we'll deal with later
    if (ethPkt.getEtherType() != Ethernet.TYPE_IPV4) {
        return;
    }
    // Get the IP header
    IPv4 ip = (IPv4) ethPkt.getPayload();
    if (ip.getProtocol() != IPv4.PROTOCOL_PIM) {
        return;
    }
    // Get the address of our the neighbor that sent this packet to us.
    IpAddress nbraddr = IpAddress.valueOf(ip.getDestinationAddress());
    if (log.isTraceEnabled()) {
        log.trace("Packet {} received on port {}", nbraddr, pimi);
    }
    // Get the PIM header
    PIM pim = (PIM) ip.getPayload();
    checkNotNull(pim);
    // Process the pim packet
    switch(pim.getPimMsgType()) {
        case PIM.TYPE_HELLO:
            pimi.processHello(ethPkt);
            break;
        case PIM.TYPE_JOIN_PRUNE_REQUEST:
            pimi.processJoinPrune(ethPkt);
            log.debug("Received a PIM Join/Prune message");
            break;
        default:
            log.debug("Received unsupported PIM type: {}", pim.getPimMsgType());
            break;
    }
}

Example 3 with PIM

use of org.onlab.packet.PIM in project onos by opennetworkinglab.

the class PimInterface method processJoinPrune.

/**
 * Process an incoming PIM JoinPrune message.
 *
 * @param ethPkt the Ethernet packet header.
 */
public void processJoinPrune(Ethernet ethPkt) {
    IPv4 ip = (IPv4) ethPkt.getPayload();
    checkNotNull(ip);
    PIM pim = (PIM) ip.getPayload();
    checkNotNull(pim);
    PIMJoinPrune jpHdr = (PIMJoinPrune) pim.getPayload();
    checkNotNull(jpHdr);
    /*
         * The Join/Prune messages are grouped by Group address. We'll walk each group address
         * where we will possibly have to walk a list of source address for the joins and prunes.
         */
    Collection<PIMJoinPruneGroup> jpgs = jpHdr.getJoinPrunes();
    for (PIMJoinPruneGroup jpg : jpgs) {
        IpPrefix gpfx = jpg.getGroup();
        // Walk the joins first.
        for (IpPrefix spfx : jpg.getJoins().values()) {
        // We may need
        }
        for (IpPrefix spfx : jpg.getPrunes().values()) {
        // TODO: this is where we many need to remove multi-cast state and possibly intents.
        }
    }
}

Example 4 with PIM

use of org.onlab.packet.PIM in project onos by opennetworkinglab.

the class PimInterface method sendJoinPrune.

private void sendJoinPrune(McastRoute route, RouteData data, boolean join) {
    PIMJoinPrune jp = new PIMJoinPrune();
    jp.addJoinPrune(route.source().toIpPrefix(), route.group().toIpPrefix(), join);
    jp.setHoldTime(join ? (short) Math.floor(JOIN_PERIOD * HOLD_TIME_MULTIPLIER) : 0);
    jp.setUpstreamAddr(new PIMAddrUnicast(data.ipAddress.toString()));
    PIM pim = new PIM();
    pim.setPIMType(PIM.TYPE_JOIN_PRUNE_REQUEST);
    pim.setPayload(jp);
    IPv4 ipv4 = new IPv4();
    ipv4.setDestinationAddress(PIM.PIM_ADDRESS.getIp4Address().toInt());
    ipv4.setSourceAddress(getIpAddress().getIp4Address().toInt());
    ipv4.setProtocol(IPv4.PROTOCOL_PIM);
    ipv4.setTtl((byte) 1);
    ipv4.setDiffServ((byte) 0xc0);
    ipv4.setPayload(pim);
    Ethernet eth = new Ethernet();
    eth.setSourceMACAddress(onosInterface.mac());
    eth.setDestinationMACAddress(MacAddress.valueOf("01:00:5E:00:00:0d"));
    eth.setEtherType(Ethernet.TYPE_IPV4);
    eth.setPayload(ipv4);
    TrafficTreatment treatment = DefaultTrafficTreatment.builder().setOutput(onosInterface.connectPoint().port()).build();
    packetService.emit(new DefaultOutboundPacket(onosInterface.connectPoint().deviceId(), treatment, ByteBuffer.wrap(eth.serialize())));
    data.timestamp = System.currentTimeMillis();
}