9 files changed, 245 insertions, 0 deletions
diff --git a/vnfs/vLB/DNSClient/.DS_Store b/vnfs/vLB/DNSClient/.DS_Store
new file mode 100644
index 00000000..210fb02d
--- /dev/null
+++ b/vnfs/vLB/DNSClient/.DS_Store
diff --git a/vnfs/vLB/DNSClient/LICENSE.TXT b/vnfs/vLB/DNSClient/LICENSE.TXT
new file mode 100644
index 00000000..ae12da20
--- /dev/null
+++ b/vnfs/vLB/DNSClient/LICENSE.TXT
@@ -0,0 +1,22 @@
+/*
+ * ============LICENSE_START==========================================
+ * ===================================================================
+ * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * ===================================================================
+ * 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.
+ * ============LICENSE_END============================================
+ *
+ * ECOMP and OpenECOMP are trademarks 
+ * and service marks of AT&T Intellectual Property.
+ *
+ */
diff --git a/vnfs/vLB/DNSClient/README.txt b/vnfs/vLB/DNSClient/README.txt
new file mode 100644
index 00000000..ce192bbb
--- /dev/null
+++ b/vnfs/vLB/DNSClient/README.txt
@@ -0,0 +1,14 @@
+README
+---
+
+Run the dnsclient.sh script to start the FDClient Java binary. The DNSMembershipManager should be activated first. FDClient will periodically send keep-alive messages to the FDServer.
+- java FDClient [process id] [server IP address] [port] [timeout (sec)] [debug]
+  - [process id]: ID of this process
+  - [server IP address]: IP address of the remote server
+  - [port]: port where the server listens for incoming packets
+  - [timeout (sec)]: how often send a packet to the server
+  - [debug]: verbose mode (TRUE: >=1, FALSE: <=0)
+- Example: java FDClient p1 192.168.9.100 8888 10 1
+
+Please change the default parameters in the dnsclient.sh script as appropriate for your configuration.
+  
diff --git a/vnfs/vLB/DNSClient/pom.xml b/vnfs/vLB/DNSClient/pom.xml
new file mode 100644
index 00000000..cfb7db93
--- /dev/null
+++ b/vnfs/vLB/DNSClient/pom.xml
@@ -0,0 +1,51 @@
+<project>
+
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>org.openecomp.demo.vnf.lb</groupId>
+  <artifactId>dns-client</artifactId>
+  <name>DNS Client</name>
+  <packaging>jar</packaging>
+  <version>1.0.0</version>
+  
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <version>2.3.2</version>
+        <configuration>
+          <archive>
+            <manifest>
+              <mainClass>main.java.DNSServer</mainClass>
+            </manifest>
+          </archive>
+        </configuration>
+    </plugin>
+
+    <plugin>
+      <groupId>org.apache.maven.plugins</groupId>
+      <artifactId>maven-deploy-plugin</artifactId>
+        <configuration>
+          <skip>false</skip>
+        </configuration>
+    </plugin>
+
+    <plugin>
+      <groupId>org.apache.maven.plugins</groupId>
+      <artifactId>maven-install-plugin</artifactId>
+      <configuration>
+        <skip>false</skip>
+      </configuration>
+     </plugin>
+    </plugins>
+  </build>
+
+  <distributionManagement>
+      <repository>
+          <id>nexus</id>
+          <name>OpenECOMP Release Repository</name>
+          <url>https://ecomp-nexus:8443/repository/raw</url>
+      </repository>
+  </distributionManagement>
+
+</project>
diff --git a/vnfs/vLB/DNSClient/src/.DS_Store b/vnfs/vLB/DNSClient/src/.DS_Store
new file mode 100644
index 00000000..dba6f684
--- /dev/null
+++ b/vnfs/vLB/DNSClient/src/.DS_Store
diff --git a/vnfs/vLB/DNSClient/src/main/.DS_Store b/vnfs/vLB/DNSClient/src/main/.DS_Store
new file mode 100644
index 00000000..9206bc71
--- /dev/null
+++ b/vnfs/vLB/DNSClient/src/main/.DS_Store
diff --git a/vnfs/vLB/DNSClient/src/main/java/.DS_Store b/vnfs/vLB/DNSClient/src/main/java/.DS_Store
new file mode 100644
index 00000000..05c35472
--- /dev/null
+++ b/vnfs/vLB/DNSClient/src/main/java/.DS_Store
diff --git a/vnfs/vLB/DNSClient/src/main/java/DNSServer.java b/vnfs/vLB/DNSClient/src/main/java/DNSServer.java
new file mode 100644
index 00000000..483819f3
--- /dev/null
+++ b/vnfs/vLB/DNSClient/src/main/java/DNSServer.java
@@ -0,0 +1,85 @@
+
+/*************************************************************************//**
+ *
+ * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ *
+ * 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 main.java;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+
+/*
+ * Client-side Failure Detector (FD) implementation.
+ * @param server_addr: IP address of the remote server
+ * @param port: the port that the FD service listens for incoming UDP packets
+ * @param timeout: how often the FD checks the status of client processes
+ * @param debug: debug mode on/off
+ */
+
+public class DNSServer {
+
+	public static void main(String[] args) throws IOException {
+		if(args.length != 5) {
+			System.out.println("Missing input parameters");
+			System.out.println("Usage:");
+			System.out.print("\t- java FDClient [process ID] [server IP address] [server port] [timeout (sec)] [debug]\n");
+			System.exit(0);
+		}
+		// IP address and port of the remote server
+		String PID = args[0];
+		String SERVER_ADDR = args[1];
+		int PORT = Integer.parseInt(args[2]);
+		long TIMEOUT = Long.parseLong(args[3]) * 1000; // convert the FD timeout to milliseconds
+		int debug = Integer.parseInt(args[4]);
+		boolean DEBUG;
+		if(debug <= 0)
+			DEBUG = false;
+		else
+			DEBUG = true;
+		
+		// Run FD client
+		new FDClient(PID, SERVER_ADDR, PORT, TIMEOUT, DEBUG);
+		
+		// Listen for reply messages
+		@SuppressWarnings("resource")
+		DatagramSocket sock = new DatagramSocket(PORT);
+		byte[] buffer = new byte[256];
+		boolean gre_tunnel_enabled = false;
+		
+		while(true) {
+			DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
+            sock.receive(packet);
+            String[] content = new String(packet.getData()).trim().split(":"); // Remove leading and trailing spaces
+            String msg_type = content[0];
+            String ip = content[1];
+            // Process only PING UDP packets
+            if(msg_type.equals("PONG")) {
+				if(DEBUG) System.out.println("Reply message received from process " + ip);
+				if(!gre_tunnel_enabled) {
+					// Set GRE tunnel towards load balancer
+					String script = new String("bash /opt/FDclient/set_gre_tunnel.sh " + ip);
+		            Runtime.getRuntime().exec(script);
+					if(DEBUG) System.out.println("GRE tunnel towards load balancer " + ip + " done");
+					gre_tunnel_enabled = true;
+				}
+            }
+            else {
+            	if(DEBUG) System.out.println("The received message is not a PONG. Received content: " + content);
+            }
+		}
+	}
+}
diff --git a/vnfs/vLB/DNSClient/src/main/java/FDClient.java b/vnfs/vLB/DNSClient/src/main/java/FDClient.java
new file mode 100644
index 00000000..8665937a
--- /dev/null
+++ b/vnfs/vLB/DNSClient/src/main/java/FDClient.java
@@ -0,0 +1,73 @@
+
+/*************************************************************************//**
+ *
+ * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ *
+ * 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 main.java;
+
+import java.io.*;
+import java.net.*;
+
+/*
+ * Client-side Failure Detector (FD) implementation.
+ * @param server_addr: IP address of the remote server
+ * @param port: the port that the FD service listens for incoming UDP packets
+ * @param timeout: how often the FD checks the status of client processes
+ * @param debug: debug mode on/off
+ */
+
+public class FDClient implements Runnable {
+	private String PID;
+	private String SERVER_ADDR;
+	private int PORT;
+	private long TIMEOUT;
+	private boolean DEBUG;
+	
+	public FDClient(String pid, String server_addr, int port, long timeout, boolean debug) throws IOException {
+		PID = pid;
+		SERVER_ADDR = server_addr;
+		PORT = port;
+		TIMEOUT = timeout;
+		DEBUG = debug;
+		(new Thread(this)).start();
+	}
+
+	@SuppressWarnings("resource")
+	@Override
+	public void run() {
+		// Define a DatagramSocket object to send packets to the server
+		try {
+			DatagramSocket sock = new DatagramSocket();
+			InetAddress IPAddress = InetAddress.getByName(SERVER_ADDR);
+
+			// Allocate buffer for the PING message
+			String content = "PING:" + PID;
+			byte[] buffer = content.getBytes();
+		
+			// Sent a PING message every TIMEOUT milliseconds
+			while(true) {
+				DatagramPacket packet = new DatagramPacket(buffer, buffer.length, IPAddress, PORT);
+				sock.send(packet);
+
+				if(DEBUG) System.out.println("Sent PING message to server " + SERVER_ADDR + ":" + PORT);
+				try {
+					Thread.sleep(TIMEOUT);
+				}
+				catch(InterruptedException e) {}
+			} 
+		} catch(IOException e) {}
+	}
+}