/**
* Gets the {@link Ip4Prefix} view of the IP prefix.
*
* @return the {@link Ip4Prefix} view of the IP prefix if it is IPv4, otherwise null
*/
public Ip4Prefix getIp4Prefix() {
if (version() != Ip4Prefix.VERSION) {
return null;
}
// Return this object itself if it is already instance of Ip4Prefix
if (this instanceof Ip4Prefix) {
return (Ip4Prefix) this;
}
return Ip4Prefix.valueOf(address.getIp4Address(), prefixLength);
}
// Install a rule forwarding the packet to the specified port.
private void installRule(PacketContext context, PortNumber portNumber) {
//
// We don't support (yet) buffer IDs in the Flow Service so
// packet out first.
//
Ethernet inPkt = context.inPacket().parsed();
TrafficSelector.Builder selectorBuilder = DefaultTrafficSelector.builder();
// If PacketOutOnly or ARP packet than forward directly to output port
if (packetOutOnly || inPkt.getEtherType() == Ethernet.TYPE_ARP) {
packetOut(context, portNumber);
return;
}
//
// If matchDstMacOnly
// Create flows matching dstMac only
// Else
// Create flows with default matching and include configured fields
//
if (matchDstMacOnly) {
selectorBuilder.matchEthDst(inPkt.getDestinationMAC());
} else {
selectorBuilder
.matchInPort(context.inPacket().receivedFrom().port())
.matchEthSrc(inPkt.getSourceMAC())
.matchEthDst(inPkt.getDestinationMAC());
// If configured Match Vlan ID
if (matchVlanId && inPkt.getVlanID() != Ethernet.VLAN_UNTAGGED) {
selectorBuilder.matchVlanId(VlanId.vlanId(inPkt.getVlanID()));
}
//
// If configured and EtherType is IPv4 - Match IPv4 and
// TCP/UDP/ICMP fields
//
if (matchIpv4Address && inPkt.getEtherType() == Ethernet.TYPE_IPV4) {
IPv4 ipv4Packet = (IPv4) inPkt.getPayload();
byte ipv4Protocol = ipv4Packet.getProtocol();
Ip4Prefix matchIp4SrcPrefix =
Ip4Prefix.valueOf(ipv4Packet.getSourceAddress(), Ip4Prefix.MAX_MASK_LENGTH);
Ip4Prefix matchIp4DstPrefix =
Ip4Prefix.valueOf(ipv4Packet.getDestinationAddress(), Ip4Prefix.MAX_MASK_LENGTH);
selectorBuilder
.matchEthType(Ethernet.TYPE_IPV4)
.matchIPSrc(matchIp4SrcPrefix)
.matchIPDst(matchIp4DstPrefix);
if (matchIpv4Dscp) {
byte dscp = ipv4Packet.getDscp();
byte ecn = ipv4Packet.getEcn();
selectorBuilder.matchIPDscp(dscp).matchIPEcn(ecn);
}
if (matchTcpUdpPorts && ipv4Protocol == IPv4.PROTOCOL_TCP) {
TCP tcpPacket = (TCP) ipv4Packet.getPayload();
selectorBuilder
.matchIPProtocol(ipv4Protocol)
.matchTcpSrc(tcpPacket.getSourcePort())
.matchTcpDst(tcpPacket.getDestinationPort());
}
if (matchTcpUdpPorts && ipv4Protocol == IPv4.PROTOCOL_UDP) {
UDP udpPacket = (UDP) ipv4Packet.getPayload();
selectorBuilder
.matchIPProtocol(ipv4Protocol)
.matchUdpSrc(udpPacket.getSourcePort())
.matchUdpDst(udpPacket.getDestinationPort());
}
if (matchIcmpFields && ipv4Protocol == IPv4.PROTOCOL_ICMP) {
ICMP icmpPacket = (ICMP) ipv4Packet.getPayload();
selectorBuilder
.matchIPProtocol(ipv4Protocol)
.matchIcmpType(icmpPacket.getIcmpType())
.matchIcmpCode(icmpPacket.getIcmpCode());
}
}
//
// If configured and EtherType is IPv6 - Match IPv6 and
// TCP/UDP/ICMP fields
//
if (matchIpv6Address && inPkt.getEtherType() == Ethernet.TYPE_IPV6) {
IPv6 ipv6Packet = (IPv6) inPkt.getPayload();
byte ipv6NextHeader = ipv6Packet.getNextHeader();
Ip6Prefix matchIp6SrcPrefix =
Ip6Prefix.valueOf(ipv6Packet.getSourceAddress(), Ip6Prefix.MAX_MASK_LENGTH);
Ip6Prefix matchIp6DstPrefix =
Ip6Prefix.valueOf(ipv6Packet.getDestinationAddress(), Ip6Prefix.MAX_MASK_LENGTH);
selectorBuilder
.matchEthType(Ethernet.TYPE_IPV6)
.matchIPv6Src(matchIp6SrcPrefix)
.matchIPv6Dst(matchIp6DstPrefix);
if (matchIpv6FlowLabel) {
selectorBuilder.matchIPv6FlowLabel(ipv6Packet.getFlowLabel());
}
if (matchTcpUdpPorts && ipv6NextHeader == IPv6.PROTOCOL_TCP) {
TCP tcpPacket = (TCP) ipv6Packet.getPayload();
selectorBuilder
.matchIPProtocol(ipv6NextHeader)
.matchTcpSrc(tcpPacket.getSourcePort())
.matchTcpDst(tcpPacket.getDestinationPort());
}
if (matchTcpUdpPorts && ipv6NextHeader == IPv6.PROTOCOL_UDP) {
UDP udpPacket = (UDP) ipv6Packet.getPayload();
selectorBuilder
.matchIPProtocol(ipv6NextHeader)
.matchUdpSrc(udpPacket.getSourcePort())
.matchUdpDst(udpPacket.getDestinationPort());
}
if (matchIcmpFields && ipv6NextHeader == IPv6.PROTOCOL_ICMP6) {
ICMP6 icmp6Packet = (ICMP6) ipv6Packet.getPayload();
selectorBuilder
.matchIPProtocol(ipv6NextHeader)
.matchIcmpv6Type(icmp6Packet.getIcmpType())
.matchIcmpv6Code(icmp6Packet.getIcmpCode());
}
}
}
TrafficTreatment treatment = DefaultTrafficTreatment.builder().setOutput(portNumber).build();
ForwardingObjective forwardingObjective =
DefaultForwardingObjective.builder()
.withSelector(selectorBuilder.build())
.withTreatment(treatment)
.withPriority(flowPriority)
.withFlag(ForwardingObjective.Flag.VERSATILE)
.fromApp(appId)
.makeTemporary(flowTimeout)
.add();
flowObjectiveService.forward(context.inPacket().receivedFrom().deviceId(), forwardingObjective);
//
// If packetOutOfppTable
// Send packet back to the OpenFlow pipeline to match installed flow
// Else
// Send packet direction on the appropriate port
//
if (packetOutOfppTable) {
packetOut(context, PortNumber.TABLE);
} else {
packetOut(context, portNumber);
}
}