| /* |
| * Copyright 2018-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.onosproject.openstacknetworking.impl; |
| |
| import com.google.common.collect.ImmutableSet; |
| import org.apache.commons.lang.StringUtils; |
| import org.apache.http.Header; |
| import org.apache.http.HttpEntityEnclosingRequest; |
| import org.apache.http.HttpMessage; |
| import org.apache.http.HttpRequest; |
| import org.apache.http.HttpResponse; |
| import org.apache.http.client.methods.CloseableHttpResponse; |
| import org.apache.http.client.methods.HttpDelete; |
| import org.apache.http.client.methods.HttpGet; |
| import org.apache.http.client.methods.HttpPost; |
| import org.apache.http.client.methods.HttpPut; |
| import org.apache.http.client.methods.HttpRequestBase; |
| import org.apache.http.impl.client.CloseableHttpClient; |
| import org.apache.http.impl.client.HttpClientBuilder; |
| import org.apache.http.message.BasicHeader; |
| import org.apache.http.message.BasicHttpResponse; |
| import org.onlab.packet.BasePacket; |
| import org.onlab.packet.Data; |
| import org.onlab.packet.Ethernet; |
| import org.onlab.packet.IPv4; |
| import org.onlab.packet.IpAddress; |
| import org.onlab.packet.IpPrefix; |
| import org.onlab.packet.TCP; |
| import org.onlab.packet.TpPort; |
| import org.onosproject.cluster.ClusterService; |
| import org.onosproject.cluster.LeadershipService; |
| import org.onosproject.cluster.NodeId; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.flow.DefaultTrafficSelector; |
| import org.onosproject.net.flow.DefaultTrafficTreatment; |
| import org.onosproject.net.flow.TrafficSelector; |
| import org.onosproject.net.flow.TrafficTreatment; |
| import org.onosproject.net.packet.DefaultOutboundPacket; |
| import org.onosproject.net.packet.PacketContext; |
| import org.onosproject.net.packet.PacketProcessor; |
| import org.onosproject.net.packet.PacketService; |
| import org.onosproject.openstacknetworking.api.Constants; |
| import org.onosproject.openstacknetworking.api.InstancePort; |
| import org.onosproject.openstacknetworking.api.InstancePortService; |
| import org.onosproject.openstacknetworking.api.OpenstackFlowRuleService; |
| import org.onosproject.openstacknetworking.api.OpenstackNetworkService; |
| import org.onosproject.openstacknode.api.OpenstackNode; |
| import org.onosproject.openstacknode.api.OpenstackNodeEvent; |
| import org.onosproject.openstacknode.api.OpenstackNodeListener; |
| import org.onosproject.openstacknode.api.OpenstackNodeService; |
| import org.openstack4j.model.network.Port; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Deactivate; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.component.annotations.ReferenceCardinality; |
| import org.slf4j.Logger; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.concurrent.ExecutorService; |
| |
| import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.onosproject.openstacknetworking.api.Constants.DHCP_TABLE; |
| import static org.onosproject.openstacknetworking.api.Constants.PRIORITY_DHCP_RULE; |
| import static org.onosproject.openstacknetworking.impl.OpenstackMetadataProxyHandler.Http.Type.RESPONSE; |
| import static org.onosproject.openstacknetworking.util.OpenstackNetworkingUtil.hmacEncrypt; |
| import static org.onosproject.openstacknetworking.util.OpenstackNetworkingUtil.parseHttpRequest; |
| import static org.onosproject.openstacknetworking.util.OpenstackNetworkingUtil.unparseHttpResponseBody; |
| import static org.onosproject.openstacknetworking.util.OpenstackNetworkingUtil.unparseHttpResponseHeader; |
| import static org.onosproject.openstacknode.api.OpenstackNode.NodeType.COMPUTE; |
| import static org.onosproject.openstacknode.api.OpenstackNode.NodeType.CONTROLLER; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Handles metadata requests for the virtual instances. |
| */ |
| @Component(immediate = true) |
| public class OpenstackMetadataProxyHandler { |
| protected final Logger log = getLogger(getClass()); |
| |
| private static final String METADATA_SERVER_IP = "169.254.169.254"; |
| private static final int METADATA_SERVER_PORT = 8775; |
| private static final int HTTP_SERVER_PORT = 80; |
| private static final int PREFIX_LENGTH = 32; |
| private static final short WINDOW_SIZE = (short) 0x1000; |
| private static final short FIN_FLAG = (short) 0x01; |
| private static final short SYN_FLAG = (short) 0x02; |
| private static final short ACK_FLAG = (short) 0x10; |
| private static final short SYN_ACK_FLAG = (short) 0x12; |
| private static final short FIN_ACK_FLAG = (short) 0x11; |
| private static final byte DATA_OFFSET = (byte) 0x5; |
| private static final short URGENT_POINTER = (short) 0x1; |
| private static final byte PACKET_TTL = (byte) 127; |
| private static final String HTTP_PREFIX = "http://"; |
| private static final String COLON = ":"; |
| |
| private static final String INSTANCE_ID_HEADER = "X-Instance-ID"; |
| private static final String INSTANCE_ID_SIGNATURE_HEADER = "X-Instance-ID-Signature"; |
| private static final String TENANT_ID_HEADER = "X-Tenant-ID"; |
| private static final String FORWARDED_FOR_HEADER = "X-Forwarded-For"; |
| |
| private static final String HTTP_GET_METHOD = "GET"; |
| private static final String HTTP_POST_METHOD = "POST"; |
| private static final String HTTP_PUT_METHOD = "PUT"; |
| private static final String HTTP_DELETE_METHOD = "DELETE"; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected PacketService packetService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected ClusterService clusterService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected LeadershipService leadershipService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected OpenstackNetworkService osNetworkService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected OpenstackNodeService osNodeService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected InstancePortService instancePortService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected OpenstackFlowRuleService osFlowRuleService; |
| |
| private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
| private final PacketProcessor packetProcessor = new InternalPacketProcessor(); |
| private final OpenstackNodeListener osNodeListener = new InternalNodeEventListener(); |
| |
| private Set<String> excludedHeaders = ImmutableSet.of("content-type", "content-length"); |
| |
| private ApplicationId appId; |
| private NodeId localNodeId; |
| |
| @Activate |
| protected void activate() { |
| appId = coreService.registerApplication(Constants.OPENSTACK_NETWORKING_APP_ID); |
| localNodeId = clusterService.getLocalNode().id(); |
| osNodeService.addListener(osNodeListener); |
| packetService.addProcessor(packetProcessor, PacketProcessor.director(0)); |
| leadershipService.runForLeadership(appId.name()); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| packetService.removeProcessor(packetProcessor); |
| osNodeService.removeListener(osNodeListener); |
| leadershipService.withdraw(appId.name()); |
| eventExecutor.shutdown(); |
| |
| log.info("Stopped"); |
| } |
| |
| private class InternalPacketProcessor implements PacketProcessor { |
| |
| @Override |
| public void process(PacketContext context) { |
| |
| if (context.isHandled()) { |
| return; |
| } |
| |
| // FIXME: need to find a way to spawn a new thread to check metadata proxy mode |
| if (!useMetadataProxy()) { |
| return; |
| } |
| |
| Ethernet ethPacket = context.inPacket().parsed(); |
| if (ethPacket == null || ethPacket.getEtherType() != Ethernet.TYPE_IPV4) { |
| return; |
| } |
| |
| IPv4 ipv4Packet = (IPv4) ethPacket.getPayload(); |
| if (ipv4Packet.getProtocol() != IPv4.PROTOCOL_TCP || |
| !IpAddress.valueOf(ipv4Packet.getDestinationAddress()). |
| equals(IpAddress.valueOf(METADATA_SERVER_IP))) { |
| return; |
| } |
| |
| TCP tcpPacket = (TCP) ipv4Packet.getPayload(); |
| if (tcpPacket.getDestinationPort() != HTTP_SERVER_PORT) { |
| return; |
| } |
| |
| // (three-way handshaking) |
| // reply TCP SYN-ACK packet with receiving TCP SYN packet |
| if (tcpPacket.getFlags() == SYN_FLAG) { |
| Ethernet ethReply = buildTcpSynAckPacket(ethPacket, ipv4Packet, tcpPacket); |
| sendReply(context, ethReply); |
| return; |
| } |
| |
| // (four-way handshaking) |
| // reply TCP ACK and TCP FIN-ACK packets with receiving TCP FIN-ACK packet |
| if (tcpPacket.getFlags() == FIN_ACK_FLAG) { |
| Ethernet ackReply = buildTcpAckPacket(ethPacket, ipv4Packet, tcpPacket); |
| sendReply(context, ackReply); |
| Ethernet finAckReply = buildTcpFinAckPacket(ethPacket, ipv4Packet, tcpPacket); |
| sendReply(context, finAckReply); |
| return; |
| } |
| |
| // normal TCP data transmission |
| Data data = (Data) tcpPacket.getPayload(); |
| byte[] byteData = data.getData(); |
| |
| if (byteData.length != 0) { |
| eventExecutor.execute(() -> { |
| processHttpRequest(context, ethPacket, ipv4Packet, tcpPacket, byteData); |
| }); |
| } |
| } |
| |
| private void processHttpRequest(PacketContext context, Ethernet ethPacket, |
| IPv4 ipv4Packet, TCP tcpPacket, byte[] byteData) { |
| HttpRequest request = parseHttpRequest(byteData); |
| ConnectPoint cp = context.inPacket().receivedFrom(); |
| InstancePort instPort = instancePortService.instancePort(cp.deviceId(), cp.port()); |
| |
| if (instPort == null || request == null) { |
| log.warn("Cannot send metadata request due to lack of information"); |
| return; |
| } |
| |
| // attempt to send HTTP request to the meta-data server (nova-api), |
| // obtain the HTTP response, relay the response to VM through packet-out |
| CloseableHttpResponse proxyResponse = proxyHttpRequest(request, instPort); |
| |
| if (proxyResponse == null) { |
| log.warn("No response was received from metadata server"); |
| return; |
| } |
| |
| HttpResponse response = new BasicHttpResponse(proxyResponse.getStatusLine()); |
| response.setEntity(proxyResponse.getEntity()); |
| response.setHeaders(proxyResponse.getAllHeaders()); |
| |
| Http httpResponse = new Http(); |
| httpResponse.setType(RESPONSE); |
| httpResponse.setMessage(response); |
| |
| TCP tcpReply = buildTcpDataPacket(tcpPacket, byteData.length, response); |
| Ethernet ethReply = buildEthFrame(ethPacket, ipv4Packet, tcpReply); |
| sendReply(context, ethReply); |
| |
| try { |
| proxyResponse.close(); |
| } catch (IOException e) { |
| log.warn("Failed to close the response connection due to {}", e); |
| } |
| } |
| |
| /** |
| * Builds an ethernet frame contains TCP sync-ack packet generated |
| * from the given TCP sync request packet. |
| * |
| * @param ethRequest ethernet request frame |
| * @param ipv4Request IPv4 request |
| * @param tcpRequest TCP request |
| * @return an ethernet frame contains newly generated TCP reply |
| */ |
| private Ethernet buildTcpSynAckPacket(Ethernet ethRequest, |
| IPv4 ipv4Request, TCP tcpRequest) { |
| |
| TCP tcpReply = buildTcpSignalPacket(tcpRequest, tcpRequest.getSequence(), |
| tcpRequest.getSequence() + 1, SYN_ACK_FLAG); |
| |
| return buildEthFrame(ethRequest, ipv4Request, tcpReply); |
| } |
| |
| /** |
| * Builds a TCP ACK packet receiving SYN packet. |
| * |
| * @param ethRequest ethernet request frame |
| * @param ipv4Request IPv4 request |
| * @param tcpRequest TCP request |
| * @return an ethernet frame contains newly generated TCP reply |
| */ |
| private Ethernet buildTcpAckPacket(Ethernet ethRequest, |
| IPv4 ipv4Request, TCP tcpRequest) { |
| TCP tcpReply = buildTcpSignalPacket(tcpRequest, tcpRequest.getAcknowledge(), |
| tcpRequest.getSequence() + 1, ACK_FLAG); |
| |
| return buildEthFrame(ethRequest, ipv4Request, tcpReply); |
| } |
| |
| /** |
| * Builds a TCP FIN-ACK packet receiving FIN-ACK packet. |
| * |
| * @param ethRequest ethernet request frame |
| * @param ipv4Request IPv4 request |
| * @param tcpRequest TCP request |
| * @return an ethernet frame contains newly generated TCP reply |
| */ |
| private Ethernet buildTcpFinAckPacket(Ethernet ethRequest, |
| IPv4 ipv4Request, TCP tcpRequest) { |
| TCP tcpReply = buildTcpSignalPacket(tcpRequest, tcpRequest.getAcknowledge(), |
| tcpRequest.getSequence() + 1, FIN_ACK_FLAG); |
| |
| return buildEthFrame(ethRequest, ipv4Request, tcpReply); |
| } |
| |
| /** |
| * Builds a TCP signaling packet. |
| * |
| * @param tcpRequest TCP request |
| * @param seq sequence number |
| * @param ack ack number |
| * @param flags TCP flags |
| * @return TCP signal packet |
| */ |
| private TCP buildTcpSignalPacket(TCP tcpRequest, int seq, int ack, short flags) { |
| TCP tcpReply = new TCP(); |
| tcpReply.setSourcePort(tcpRequest.getDestinationPort()); |
| tcpReply.setDestinationPort(tcpRequest.getSourcePort()); |
| tcpReply.setSequence(seq); |
| tcpReply.setAcknowledge(ack); |
| tcpReply.setDataOffset(DATA_OFFSET); |
| tcpReply.setFlags(flags); |
| tcpReply.setWindowSize(WINDOW_SIZE); |
| tcpReply.setUrgentPointer(URGENT_POINTER); |
| |
| return tcpReply; |
| } |
| |
| /** |
| * Builds a TCP data packet. |
| * |
| * @param tcpRequest TCP request |
| * @param requestLength TCP request data length |
| * @param response HTTP response |
| * @return a TCP data packet |
| */ |
| private TCP buildTcpDataPacket(TCP tcpRequest, int requestLength, |
| HttpResponse response) { |
| TCP tcpReply = new TCP(); |
| tcpReply.setSourcePort(tcpRequest.getDestinationPort()); |
| tcpReply.setDestinationPort(tcpRequest.getSourcePort()); |
| tcpReply.setSequence(tcpRequest.getAcknowledge()); |
| tcpReply.setAcknowledge(tcpRequest.getSequence() + requestLength); |
| tcpReply.setDataOffset(DATA_OFFSET); // no options |
| tcpReply.setFlags(ACK_FLAG); |
| tcpReply.setWindowSize(WINDOW_SIZE); |
| tcpReply.setUrgentPointer(URGENT_POINTER); |
| |
| Http httpResponse = new Http(); |
| httpResponse.setType(RESPONSE); |
| httpResponse.setMessage(response); |
| |
| tcpReply.setPayload(httpResponse); |
| |
| return tcpReply; |
| } |
| |
| /** |
| * Builds an ethernet frame with the given IPv4 and TCP payload. |
| * |
| * @param ethRequest ethernet request frame |
| * @param ipv4Request IPv4 request |
| * @param tcpReply TCP reply |
| * @return an ethernet frame contains TCP payload |
| */ |
| private Ethernet buildEthFrame(Ethernet ethRequest, IPv4 ipv4Request, |
| TCP tcpReply) { |
| Ethernet ethReply = new Ethernet(); |
| ethReply.setSourceMACAddress(ethRequest.getDestinationMAC()); |
| ethReply.setDestinationMACAddress(ethRequest.getSourceMAC()); |
| ethReply.setEtherType(ethRequest.getEtherType()); |
| |
| IPv4 ipv4Reply = new IPv4(); |
| ipv4Reply.setSourceAddress(ipv4Request.getDestinationAddress()); |
| ipv4Reply.setDestinationAddress(ipv4Request.getSourceAddress()); |
| ipv4Reply.setTtl(PACKET_TTL); |
| |
| ipv4Reply.setPayload(tcpReply); |
| ethReply.setPayload(ipv4Reply); |
| |
| return ethReply; |
| } |
| |
| /** |
| * Obtains the metadata path. |
| * |
| * @param uri metadata request URI |
| * @return full metadata path |
| */ |
| private String getMetadataPath(String uri) { |
| OpenstackNode controller = osNodeService.completeNodes(CONTROLLER). |
| stream().findFirst().orElse(null); |
| if (controller == null) { |
| return null; |
| } |
| |
| String novaMetadataIpTmp = controller.neutronConfig().novaMetadataIp(); |
| String novaMetadataIp = novaMetadataIpTmp != null |
| ? novaMetadataIpTmp : controller.managementIp().toString(); |
| Integer novaMetadataPortTmp = controller.neutronConfig().novaMetadataPort(); |
| int novaMetadataPort = novaMetadataPortTmp != null |
| ? novaMetadataPortTmp : METADATA_SERVER_PORT; |
| |
| return HTTP_PREFIX + novaMetadataIp + COLON + novaMetadataPort + uri; |
| } |
| |
| /** |
| * Proxyies HTTP request. |
| * |
| * @param oldRequest HTTP request |
| * @param instPort instance port |
| * @return HTTP response |
| */ |
| private CloseableHttpResponse proxyHttpRequest(HttpRequest oldRequest, |
| InstancePort instPort) { |
| |
| CloseableHttpClient client = HttpClientBuilder.create().build(); |
| String url = getMetadataPath(oldRequest.getRequestLine().getUri()); |
| |
| if (StringUtils.isEmpty(url)) { |
| log.warn("The metadata endpoint is not configured!"); |
| return null; |
| } |
| |
| HttpRequestBase request; |
| |
| String method = oldRequest.getRequestLine().getMethod().toUpperCase(); |
| |
| log.info("Sending HTTP {} request to metadata endpoint {}...", method, url); |
| |
| switch (method) { |
| case HTTP_POST_METHOD: |
| request = new HttpPost(url); |
| HttpEntityEnclosingRequest postRequest = |
| (HttpEntityEnclosingRequest) oldRequest; |
| ((HttpPost) request).setEntity(postRequest.getEntity()); |
| break; |
| case HTTP_PUT_METHOD: |
| request = new HttpPut(url); |
| HttpEntityEnclosingRequest putRequest = |
| (HttpEntityEnclosingRequest) oldRequest; |
| ((HttpPut) request).setEntity(putRequest.getEntity()); |
| break; |
| case HTTP_DELETE_METHOD: |
| request = new HttpDelete(url); |
| break; |
| case HTTP_GET_METHOD: |
| default: |
| request = new HttpGet(url); |
| break; |
| } |
| |
| // configure headers from original HTTP request |
| for (Header header : oldRequest.getAllHeaders()) { |
| if (method.equals(HTTP_POST_METHOD) || |
| method.equals(HTTP_PUT_METHOD)) { |
| // we DO NOT add duplicated HTTP headers for POST and PUT methods |
| if (excludedHeaders.contains(header.getName().toLowerCase())) { |
| continue; |
| } |
| } |
| request.addHeader(header); |
| } |
| |
| request.setProtocolVersion(oldRequest.getProtocolVersion()); |
| |
| Port port = osNetworkService.port(instPort.portId()); |
| |
| request.addHeader(new BasicHeader(INSTANCE_ID_HEADER, port.getDeviceId())); |
| request.addHeader(new BasicHeader(TENANT_ID_HEADER, port.getTenantId())); |
| request.addHeader(new BasicHeader(FORWARDED_FOR_HEADER, instPort.ipAddress().toString())); |
| if (metadataSecret() != null) { |
| request.addHeader(new BasicHeader(INSTANCE_ID_SIGNATURE_HEADER, |
| hmacEncrypt(metadataSecret(), port.getDeviceId()))); |
| } |
| |
| try { |
| return client.execute(request); |
| } catch (IOException e) { |
| log.warn("Failed to get response from metadata server due to {}", e); |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Sends out ethernet frame. |
| * |
| * @param context packet context |
| * @param ethReply ethernet frame |
| */ |
| private void sendReply(PacketContext context, Ethernet ethReply) { |
| if (ethReply == null) { |
| return; |
| } |
| ConnectPoint srcPoint = context.inPacket().receivedFrom(); |
| TrafficTreatment treatment = DefaultTrafficTreatment |
| .builder() |
| .setOutput(srcPoint.port()) |
| .build(); |
| |
| packetService.emit(new DefaultOutboundPacket( |
| srcPoint.deviceId(), |
| treatment, |
| ByteBuffer.wrap(ethReply.serialize()))); |
| context.block(); |
| } |
| |
| private String metadataSecret() { |
| OpenstackNode controller = osNodeService.completeNodes(CONTROLLER) |
| .stream().findFirst().orElse(null); |
| |
| if (controller != null && controller.neutronConfig() != null) { |
| return controller.neutronConfig().metadataProxySecret(); |
| } |
| |
| return null; |
| } |
| } |
| |
| private class InternalNodeEventListener implements OpenstackNodeListener { |
| @Override |
| public boolean isRelevant(OpenstackNodeEvent event) { |
| return event.subject().type() == COMPUTE; |
| } |
| |
| private boolean isRelevantHelper() { |
| return Objects.equals(localNodeId, leadershipService.getLeader(appId.name())) |
| && useMetadataProxy(); |
| } |
| |
| @Override |
| public void event(OpenstackNodeEvent event) { |
| OpenstackNode osNode = event.subject(); |
| switch (event.type()) { |
| case OPENSTACK_NODE_COMPLETE: |
| eventExecutor.execute(() -> processNodeCompletion(osNode)); |
| break; |
| case OPENSTACK_NODE_INCOMPLETE: |
| eventExecutor.execute(() -> processNodeIncompletion(osNode)); |
| break; |
| case OPENSTACK_NODE_CREATED: |
| case OPENSTACK_NODE_UPDATED: |
| case OPENSTACK_NODE_REMOVED: |
| default: |
| break; |
| } |
| } |
| |
| private void processNodeCompletion(OpenstackNode osNode) { |
| if (!isRelevantHelper()) { |
| return; |
| } |
| |
| setMetadataRule(osNode, true); |
| } |
| |
| private void processNodeIncompletion(OpenstackNode osNode) { |
| if (!isRelevantHelper()) { |
| return; |
| } |
| |
| setMetadataRule(osNode, false); |
| } |
| |
| /** |
| * Installs metadata rule for receiving all metadata request packets. |
| * |
| * @param osNode openstack node |
| * @param install installation flag |
| */ |
| private void setMetadataRule(OpenstackNode osNode, boolean install) { |
| TrafficSelector selector = DefaultTrafficSelector.builder() |
| .matchEthType(Ethernet.TYPE_IPV4) |
| .matchIPProtocol(IPv4.PROTOCOL_TCP) |
| .matchIPDst(IpPrefix.valueOf( |
| IpAddress.valueOf(METADATA_SERVER_IP), PREFIX_LENGTH)) |
| .matchTcpDst(TpPort.tpPort(HTTP_SERVER_PORT)) |
| .build(); |
| |
| TrafficTreatment treatment = DefaultTrafficTreatment.builder() |
| .punt() |
| .build(); |
| |
| osFlowRuleService.setRule( |
| appId, |
| osNode.intgBridge(), |
| selector, |
| treatment, |
| PRIORITY_DHCP_RULE, |
| DHCP_TABLE, |
| install); |
| } |
| } |
| |
| private boolean useMetadataProxy() { |
| OpenstackNode gw = osNodeService.completeNodes(CONTROLLER) |
| .stream().findFirst().orElse(null); |
| |
| if (gw != null && gw.neutronConfig() != null) { |
| return gw.neutronConfig().useMetadataProxy(); |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Implements Http packet format. |
| */ |
| protected static class Http extends BasePacket { |
| |
| /** |
| * HTTP packet type. |
| */ |
| public enum Type { |
| |
| /** |
| * Signifies that this is a Http REQUEST packet. |
| */ |
| REQUEST, |
| |
| /** |
| * Signifies that this is a Http RESPONSE packet. |
| */ |
| RESPONSE, |
| } |
| |
| private Type type; |
| private HttpMessage message; |
| |
| Http() { |
| } |
| |
| /** |
| * Obtains the Http type. |
| * |
| * @return Http type |
| */ |
| public Type getType() { |
| return type; |
| } |
| |
| /** |
| * Configures the Http type. |
| * |
| * @param type Http type |
| */ |
| public void setType(Type type) { |
| this.type = type; |
| } |
| |
| /** |
| * Obtains the Http message. |
| * |
| * @return Http message |
| */ |
| public HttpMessage getMessage() { |
| return message; |
| } |
| |
| /** |
| * Configures the Http message. |
| * |
| * @param message Http message |
| */ |
| public void setMessage(HttpMessage message) { |
| this.message = message; |
| } |
| |
| @Override |
| public byte[] serialize() { |
| if (type == RESPONSE) { |
| |
| byte[] header = unparseHttpResponseHeader((HttpResponse) message); |
| byte[] body = unparseHttpResponseBody((HttpResponse) message); |
| |
| if (header == null || body == null) { |
| return new byte[0]; |
| } |
| |
| final byte[] data = new byte[header.length + body.length]; |
| final ByteBuffer bb = ByteBuffer.wrap(data); |
| bb.put(header); |
| bb.put(body); |
| |
| return data; |
| } |
| return new byte[0]; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| |
| if (this == o) { |
| return true; |
| } |
| |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| |
| if (!super.equals(o)) { |
| return false; |
| } |
| |
| Http http = (Http) o; |
| return type == http.type && |
| com.google.common.base.Objects.equal(message, http.message); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(type, message); |
| } |
| } |
| } |