use of org.onosproject.k8snetworking.api.Constants.NODE_IP_PREFIX in project onos by opennetworkinglab.
the class K8sSwitchingArpHandler method processArpRequest.
private void processArpRequest(PacketContext context, Ethernet ethPacket) {
ARP arpPacket = (ARP) ethPacket.getPayload();
K8sPort srcK8sPort = k8sNetworkService.ports().stream().filter(p -> p.macAddress().equals(ethPacket.getSourceMAC())).findAny().orElse(null);
PortNumber srcPortNum = context.inPacket().receivedFrom().port();
DeviceId srcDeviceId = context.inPacket().receivedFrom().deviceId();
boolean isEntryPort = false;
for (K8sNode node : k8sNodeService.completeNodes()) {
if (srcDeviceId.equals(node.intgBridge()) && srcPortNum.equals(node.intgEntryPortNum())) {
isEntryPort = true;
}
}
// integration bridge entry port, we simply ignore the ARP request...
if (srcK8sPort == null && !isEntryPort) {
log.warn("Failed to find source port(MAC:{})", ethPacket.getSourceMAC());
return;
}
IpAddress targetIp = Ip4Address.valueOf(arpPacket.getTargetProtocolAddress());
// look up the MAC address from regular k8s ports
MacAddress replyMac = k8sNetworkService.ports().stream().filter(p -> p.ipAddress().equals(targetIp)).map(K8sPort::macAddress).findAny().orElse(null);
// look up the MAC address from special integration entry port (e.g., LOCAL, k8s-int-os)
for (K8sNetwork network : k8sNetworkService.networks()) {
if (network.gatewayIp().equals(targetIp)) {
K8sNode node = k8sNodeService.node(network.name());
replyMac = node.intgEntryPortMac();
}
}
if (replyMac == null) {
String cidr = k8sNetworkService.networks().stream().map(K8sNetwork::cidr).findAny().orElse(null);
if (cidr != null) {
String unshiftedIp = unshiftIpDomain(targetIp.toString(), SHIFTED_IP_PREFIX, cidr);
replyMac = k8sNetworkService.ports().stream().filter(p -> p.ipAddress().equals(IpAddress.valueOf(unshiftedIp))).map(K8sPort::macAddress).findAny().orElse(null);
}
}
if (replyMac == null) {
Set<String> serviceIps = k8sServiceService.services().stream().map(s -> s.getSpec().getClusterIP()).collect(Collectors.toSet());
if (serviceIps.contains(targetIp.toString())) {
replyMac = MacAddress.valueOf(SERVICE_FAKE_MAC_STR);
}
}
if (replyMac == null) {
if (targetIp.toString().startsWith(NODE_IP_PREFIX)) {
String targetIpPrefix = targetIp.toString().split("\\.")[1];
String nodePrefix = NODE_IP_PREFIX + "." + targetIpPrefix;
String origNodeCidr = k8sNodeService.completeNodes().stream().map(n -> n.nodeIp().toString()).findAny().orElse(null);
if (origNodeCidr != null) {
String origNodeIp = unshiftIpDomain(targetIp.toString(), nodePrefix, origNodeCidr);
IpPrefix k8sNodeIpCidr = IpPrefix.valueOf(IpAddress.valueOf(origNodeCidr), 24);
SubnetUtils k8sNodeSubnet = new SubnetUtils(k8sNodeIpCidr.toString());
String k8sNodeGateway = getGatewayIp(k8sNodeIpCidr.toString()).toString();
String seekIp = "";
if (!k8sNodeSubnet.getInfo().isInRange(origNodeIp)) {
replyMac = extHostMacStore.asJavaMap().get(IpAddress.valueOf(k8sNodeGateway));
seekIp = k8sNodeGateway;
} else {
replyMac = extHostMacStore.asJavaMap().get(IpAddress.valueOf(origNodeIp));
seekIp = origNodeIp;
}
// we need to manually learn their MAC addresses
if (replyMac == null) {
ConnectPoint cp = context.inPacket().receivedFrom();
K8sNode k8sNode = k8sNodeService.node(cp.deviceId());
if (k8sNode != null) {
// we use fake IP and MAC address as a source to
// query destination MAC address
setArpRequest(MacAddress.valueOf(NODE_FAKE_MAC_STR).toBytes(), IpAddress.valueOf(NODE_FAKE_IP_STR).toOctets(), IpAddress.valueOf(seekIp).toOctets(), k8sNode);
context.block();
return;
}
}
}
}
}
if (replyMac == null) {
replyMac = MacAddress.valueOf(gatewayMac);
}
Ethernet ethReply = ARP.buildArpReply(targetIp.getIp4Address(), replyMac, ethPacket);
TrafficTreatment treatment = DefaultTrafficTreatment.builder().setOutput(context.inPacket().receivedFrom().port()).build();
packetService.emit(new DefaultOutboundPacket(context.inPacket().receivedFrom().deviceId(), treatment, ByteBuffer.wrap(ethReply.serialize())));
context.block();
}
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