mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-12-23 01:29:33 +00:00
added support for linux:
* starting external Contiki process to setup tun interface (instead of JNI solution) * sending simulation-generated packets to loopback network device (need to activate forwarding and disable rp filter)
This commit is contained in:
fros4943
parent
747d27ecda
commit
c36aae56bb
@ -26,7 +26,7 @@
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: NativeIPGateway.java,v 1.1 2008/12/09 16:57:57 fros4943 Exp $
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* $Id: NativeIPGateway.java,v 1.2 2008/12/12 16:27:40 fros4943 Exp $
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*/
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package se.sics.cooja.plugins;
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@ -38,12 +38,11 @@ import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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import java.awt.event.ItemEvent;
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import java.awt.event.ItemListener;
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import java.io.IOException;
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import java.util.Collection;
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import java.util.Observable;
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import java.util.Observer;
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import java.util.Vector;
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import java.io.*;
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import javax.swing.BorderFactory;
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import javax.swing.Box;
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import javax.swing.BoxLayout;
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@ -57,7 +56,6 @@ import jpcap.JpcapSender;
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import jpcap.NetworkInterface;
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import jpcap.packet.EthernetPacket;
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import jpcap.packet.IPPacket;
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import org.apache.log4j.Logger;
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import org.jdom.Element;
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@ -93,6 +91,7 @@ public class NativeIPGateway extends VisPlugin {
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private NetworkInterface[] networkInterfacesAll;
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private NetworkInterface networkInterface = null;
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private NetworkInterface loopbackInterface = null;
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private Thread captureThread = null;
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private JpcapCaptor captor = null;
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private JpcapSender sender = null;
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@ -112,13 +111,35 @@ public class NativeIPGateway extends VisPlugin {
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private JComboBox selectNICComboBox;
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private JCheckBox autoRegisterRoutes;
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private final boolean ON_WINDOWS;
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private final String NETMASK = "255.255.0.0";
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private String restoreRoutesCmd = null;
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private Process tunProcess = null;
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private final static String TUNNEL_APP_TARGET = "minimal-net";
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private boolean shouldDisableLoopbackForwarding = false;
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private boolean shouldEnableRPFilter = false;
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private SlipState readSlipState = SlipState.STATE_OK;
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private int readSlipLength = 0;
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private final int READ_SLIP_BUFFER_SIZE = 256;
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private byte[] readSlipBuffer = new byte[READ_SLIP_BUFFER_SIZE];
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public NativeIPGateway(Mote mote, Simulation simulation, GUI gui) {
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super("Native IP Gateway (" + mote + ")", gui);
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this.mote = mote;
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serialPort = (SerialPort) mote.getInterfaces().getLog();
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/* Native OS - plugin depends on platform specific commands */
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String osName = System.getProperty("os.name").toLowerCase();
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if (osName.startsWith("win")) {
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ON_WINDOWS = true;
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} else {
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ON_WINDOWS = false;
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}
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/* Mote serial port */
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serialPort = (SerialPort) mote.getInterfaces().getLog();
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if (serialPort == null) {
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throw new RuntimeException("No mote serial port");
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}
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@ -156,7 +177,7 @@ public class NativeIPGateway extends VisPlugin {
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}
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});
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autoRegisterRoutes = new JCheckBox();
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autoRegisterRoutes = new JCheckBox("", true);
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autoRegisterRoutes.addActionListener(new ActionListener() {
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public void actionPerformed(ActionEvent e) {
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if (autoRegisterRoutes.isSelected()) {
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@ -165,14 +186,30 @@ public class NativeIPGateway extends VisPlugin {
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}
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});
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/* Create tunnel interface to capture packet on (default) */
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createTunInterface();
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/* Configure loopback interface */
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configureLoopbackInterface();
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/* Network interfaces list */
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networkInterfacesAll = JpcapCaptor.getDeviceList();
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if (networkInterfacesAll == null || networkInterfacesAll.length == 0) {
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throw new RuntimeException("No network interfaces found");
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}
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selectNICComboBox = new JComboBox();
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for (NetworkInterface networkInterface2 : networkInterfacesAll) {
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selectNICComboBox.addItem(networkInterface2.description + " (" + networkInterface2.name + ")");
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NetworkInterface tunnelInterface = null;
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for (NetworkInterface intf : networkInterfacesAll) {
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if (!ON_WINDOWS && intf.name.equals("lo")) {
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loopbackInterface = intf;
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}
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if ((intf.name != null && intf.name.equals("tap0")) ||
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(intf.description != null && intf.description.contains("VMware Virtual Ethernet Adapter"))) {
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tunnelInterface = intf;
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}
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selectNICComboBox.addItem(intf.description + " (" + intf.name + ")");
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}
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selectNICComboBox.addItemListener(new ItemListener() {
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public void itemStateChanged(ItemEvent e) {
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@ -211,7 +248,7 @@ public class NativeIPGateway extends VisPlugin {
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ipLabel = addInfo(mainPane, "Mote IP Address:", moteIP);
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ipLabel.setToolTipText(null);
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addComponent(mainPane, "Capture on: ", selectNICComboBox);
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addComponent(mainPane, "Route to/Capture on: ", selectNICComboBox);
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addComponent(mainPane, "Auto-register native route: ", autoRegisterRoutes);
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addInfo(mainPane, "", "");
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@ -231,7 +268,12 @@ public class NativeIPGateway extends VisPlugin {
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pack();
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setSize(getWidth()+10, getHeight()+10);
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startCapturingPackets(networkInterfacesAll[0]);
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/* Start capturing network traffic for simulated network */
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if (tunnelInterface != null) {
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startCapturingPackets(tunnelInterface);
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} else {
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startCapturingPackets(networkInterfacesAll[0]);
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}
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try {
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setSelected(true);
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@ -259,12 +301,12 @@ public class NativeIPGateway extends VisPlugin {
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/* Capture thread for incoming IP packets */
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captureThread = new Thread() {
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public void run() {
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shutdownCaptureThread = false;
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/*logger.info("Capture thread started");*/
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try {
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captor = JpcapCaptor.openDevice(networkInterface, 65535, true, 20);
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captor.setNonBlockingMode(false);
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captor.setPacketReadTimeout(20);
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String[] ipSplit = moteIP.split("\\.");
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if (ipSplit.length != 4) {
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logger.fatal("Bad mote IP address: " + moteIP);
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@ -290,21 +332,31 @@ public class NativeIPGateway extends VisPlugin {
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/*logger.info("Capture thread terminated");*/
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}
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};
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shutdownCaptureThread = false;
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captureThread.start();
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/* Prepare packet sender */
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try {
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if (sender != null) {
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sender.close();
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sender = null;
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}
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if (sender == null) {
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if (loopbackInterface != null) {
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sender = JpcapSender.openDevice(loopbackInterface);
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} else {
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sender = JpcapSender.openDevice(networkInterface);
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}
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}
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sender = null;
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sender = JpcapSender.openDevice(networkInterface);
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} catch (IOException e) {
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logger.fatal("Can not send packets on this network interface");
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if (sender != null) {
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sender.close();
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if (!e.getMessage().contains("The operation completed successfully")) {
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logger.fatal("Can not send packets on this network interface: " + e.getMessage());
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if (sender != null) {
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sender.close();
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}
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sender = null;
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}
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sender = null;
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}
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System.arraycopy(networkInterface.mac_address, 0, networkInterfaceMAC, 0, 6);
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@ -339,9 +391,191 @@ public class NativeIPGateway extends VisPlugin {
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selectNICComboBox.setSelectedItem(networkInterface.description + " (" + networkInterface.name + ")");
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}
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private final String FAKE_GATEWAY_IP_D = "254";
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private final String NETMASK = "255.255.0.0";
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private String deleteRouteCmd = null;
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private void configureLoopbackInterface() {
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if (ON_WINDOWS) {
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/* Nothing to configure */
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} else {
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configureLoopbackInterfaceLinux();
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}
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}
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private void configureLoopbackInterfaceLinux() {
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enableLoopbackForwardingLinux();
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disableLoopbackRPFilterLinux();
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}
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private void enableLoopbackForwardingLinux() {
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try {
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File forwardingFile = new File("/proc/sys/net/ipv4/conf/lo/forwarding");
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if (!forwardingFile.exists() || !forwardingFile.canWrite()) {
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logger.warn("No access to " + forwardingFile.getPath());
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return;
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}
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Process process = Runtime.getRuntime().exec("cat " + forwardingFile.getPath());
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process.waitFor();
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char forwardingValue = (char) process.getInputStream().read();
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/*logger.debug(forwardingFile.getPath() + " has value: " + forwardingValue);*/
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if (forwardingValue != '1' && forwardingValue != '0') {
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logger.fatal("Unknown value in " + forwardingFile.getPath() + ": " + forwardingValue);
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return;
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}
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if (forwardingValue == '1') {
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logger.info("Forwarding already enabled on loopback interface. No action.");
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return;
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}
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process = Runtime.getRuntime().exec(new String[] { "bash", "-c", "echo 1 > " + forwardingFile.getPath() });
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process.waitFor();
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logger.info("Enabled forwarding on loopback interface.");
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shouldDisableLoopbackForwarding = true;
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} catch (IOException e) {
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e.printStackTrace();
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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private void disableLoopbackForwardingLinux() {
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try {
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File forwardingFile = new File("/proc/sys/net/ipv4/conf/lo/forwarding");
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if (!forwardingFile.exists() || !forwardingFile.canWrite()) {
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logger.warn("No access to " + forwardingFile.getPath());
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return;
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}
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Process process = Runtime.getRuntime().exec(new String[] { "bash", "-c", "echo 0 > " + forwardingFile.getPath() });
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process.waitFor();
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logger.info("Disabled forwarding on loopback interface.");
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} catch (IOException e) {
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e.printStackTrace();
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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private void disableLoopbackRPFilterLinux() {
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try {
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File filterFile = new File("/proc/sys/net/ipv4/conf/lo/rp_filter");
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if (!filterFile.exists() || !filterFile.canWrite()) {
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logger.warn("No access to " + filterFile.getPath());
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return;
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}
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Process process = Runtime.getRuntime().exec("cat " + filterFile.getPath());
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process.waitFor();
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char filterValue = (char) process.getInputStream().read();
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/*logger.debug(filterFile.getPath() + " has value: " + filterValue);*/
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if (filterValue != '1' && filterValue != '0') {
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logger.fatal("Unknown value in " + filterFile.getPath() + ": " + filterValue);
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return;
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}
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if (filterValue == '0') {
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logger.info("RP filter already disabled on loopback interface. No action.");
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return;
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}
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process = Runtime.getRuntime().exec(new String[] { "bash", "-c", "echo 0 > " + filterFile.getPath() });
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process.waitFor();
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logger.info("Disabled RP filter on loopback interface.");
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shouldEnableRPFilter = true;
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} catch (IOException e) {
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e.printStackTrace();
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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private void enableLoopbackRPFilterLinux() {
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try {
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File filterFile = new File("/proc/sys/net/ipv4/conf/lo/rp_filter");
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if (!filterFile.exists() || !filterFile.canWrite()) {
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logger.warn("No access to " + filterFile.getPath());
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return;
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}
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Process process = Runtime.getRuntime().exec(new String[] { "bash", "-c", "echo 1 > " + filterFile.getPath() });
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process.waitFor();
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logger.info("Enabled RP filter on loopback interface.");
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} catch (IOException e) {
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e.printStackTrace();
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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private void createTunInterface() {
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if (ON_WINDOWS) {
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logger.warn("Cannot create tunnel network interface on Windows. Try using VMware interfaces.");
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} else {
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createTunInterfaceLinux();
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}
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}
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private void createTunInterfaceLinux() {
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try {
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/* Create tunnel interface by starting any Contiki minimal-net application.
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* We use the hello-world application.
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*
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* The Contiki node should have the IP address 192.168.1.2. */
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String tunContikiApp = "hello-world." + TUNNEL_APP_TARGET;
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File tunContikiAppDir =
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new File(GUI.getExternalToolsSetting("PATH_CONTIKI"), "examples/hello-world");
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/*logger.info("Creating tap0 via " + tunContikiAppDir + "/" + tunContikiApp);*/
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String[] compileCmd = new String[3];
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compileCmd[0] = "make";
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compileCmd[1] = tunContikiApp;
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compileCmd[2] = "TARGET=" + TUNNEL_APP_TARGET;
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logger.info("> " + compileCmd[0] + " " + compileCmd[1] + " " + compileCmd[2]);
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Process compileProcess = Runtime.getRuntime().exec(compileCmd, null, tunContikiAppDir);
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compileProcess.waitFor();
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boolean compileOK = compileProcess.exitValue() == 0;
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if (!compileOK) {
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throw new Exception(tunContikiAppDir + "/" + tunContikiApp + " compilation failed");
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}
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String[] tunAppCmd = new String[1];
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tunAppCmd[0] = "./" + tunContikiApp;
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logger.info("> " + tunAppCmd[0]);
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tunProcess = Runtime.getRuntime().exec(tunAppCmd, null, tunContikiAppDir);
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/* Waiting some time - otherwise pcap may not discover the new interface */
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Thread.sleep(250);
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logger.info("Created tap0 via " + tunContikiAppDir + "/" + tunContikiApp);
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} catch (Exception e) {
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logger.fatal("Error when creating tap0: " + e.getMessage());
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logger.fatal("Try using an already existing network interface");
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}
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}
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private void deleteTunInterface() {
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if (ON_WINDOWS) {
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/*deleteTunInterfaceWindows();*/
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} else {
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deleteTunInterfaceLinux();
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}
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}
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private void deleteTunInterfaceLinux() {
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if (tunProcess == null) {
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return;
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}
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try {
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tunProcess.destroy();
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logger.debug("Closed tap0 process");
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} catch (Exception e) {
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logger.fatal("Error when deleting tap0: " + e.getMessage());
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}
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}
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private void updateNativeRoute() {
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if (mote.getInterfaces().getIPAddress().getIPString().equals("0.0.0.0")) {
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@ -354,33 +588,26 @@ public class NativeIPGateway extends VisPlugin {
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return;
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}
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String osName = System.getProperty("os.name").toLowerCase();
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if (osName.startsWith("win")) {
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if (ON_WINDOWS) {
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updateNativeRouteWindows();
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} else {
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updateNativeRouteLinux();
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}
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}
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private void updateNativeRouteLinux() {
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logger.fatal("updateNativeRouteLinux() not implemented");
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/* ifconfig tap0 inet 192.168.250.1") */
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/* route delete 172.16.0.0/16 */
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/* route add 172.16.0.0/16 192.168.250.2 */
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}
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private void updateNativeRouteWindows() {
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if (deleteRouteCmd != null) {
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logger.info("Deleting old route: '" + deleteRouteCmd + "'");
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if (restoreRoutesCmd != null) {
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/*logger.info("Deleting old route: '" + restoreRoutesCmd + "'");*/
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try {
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Process routeProcess = Runtime.getRuntime().exec(deleteRouteCmd);
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logger.info("> " + restoreRoutesCmd);
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Process routeProcess = Runtime.getRuntime().exec(restoreRoutesCmd);
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routeProcess.waitFor();
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} catch (IOException e) {
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e.printStackTrace();
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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deleteRouteCmd = null;
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restoreRoutesCmd = null;
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}
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String moteNetIP =
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@ -393,18 +620,54 @@ public class NativeIPGateway extends VisPlugin {
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(0xFF&networkInterface.addresses[0].address.getAddress()[0]) + "." +
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(0xFF&networkInterface.addresses[0].address.getAddress()[1]) + "." +
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(0xFF&networkInterface.addresses[0].address.getAddress()[2]) + "." +
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FAKE_GATEWAY_IP_D;
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"254"; /* Non-existing gateway - just make the packets go away */
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/*logger.info("Gateway IP: " + gatewayIP);*/
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/*logger.info("Netmask: " + NETMASK);*/
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String cmd = "route add " + moteNetIP + " mask " + NETMASK + " " + gatewayIP;
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try {
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logger.info("Adding new route: '" + cmd + "'");
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logger.info("Registering route to simulated network");
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String cmd = "route add " + moteNetIP + " mask " + NETMASK + " " + gatewayIP;
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logger.info("> " + cmd);
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Process routeProcess = Runtime.getRuntime().exec(cmd);
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routeProcess.waitFor();
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deleteRouteCmd = "route delete " + moteNetIP;
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restoreRoutesCmd = "route delete " + moteNetIP;
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} catch (IOException e) {
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e.printStackTrace();
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||||
} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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private void updateNativeRouteLinux() {
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String moteNetIP =
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mote.getInterfaces().getIPAddress().getIPString().split("\\.")[0] + "." +
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||||
mote.getInterfaces().getIPAddress().getIPString().split("\\.")[1] + "." +
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||||
"0.0";
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||||
/*logger.info("Simulation IP net : " + moteNetIP);*/
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||||
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String gatewayIP =
|
||||
(0xFF&networkInterface.addresses[0].address.getAddress()[0]) + "." +
|
||||
(0xFF&networkInterface.addresses[0].address.getAddress()[1]) + "." +
|
||||
(0xFF&networkInterface.addresses[0].address.getAddress()[2]) + "." +
|
||||
"2";
|
||||
/*logger.info("Gateway IP: " + gatewayIP);*/
|
||||
|
||||
/*logger.info("Netmask: " + NETMASK);*/
|
||||
|
||||
try {
|
||||
logger.info("Registering route to simulated network");
|
||||
|
||||
restoreRoutesCmd = "route del -net " + moteNetIP + " netmask 255.255.0.0";
|
||||
logger.info("> " + restoreRoutesCmd);
|
||||
Process process = Runtime.getRuntime().exec(restoreRoutesCmd);
|
||||
process.waitFor();
|
||||
|
||||
String cmd = "route add -net " + moteNetIP + " netmask " + NETMASK + " gw " + gatewayIP;
|
||||
logger.info("> " + cmd);
|
||||
process = Runtime.getRuntime().exec(cmd);
|
||||
process.waitFor();
|
||||
} catch (IOException e) {
|
||||
e.printStackTrace();
|
||||
} catch (InterruptedException e) {
|
||||
@ -438,10 +701,6 @@ public class NativeIPGateway extends VisPlugin {
|
||||
}
|
||||
|
||||
private void handleOutgoingPacket(byte[] packetData) {
|
||||
if (sender == null) {
|
||||
logger.warn("No sender instance, dropping outgoing packet");
|
||||
return;
|
||||
}
|
||||
|
||||
/* Sanity check outgoing data */
|
||||
if (packetData.length < IP_HEADER_LEN) {
|
||||
@ -454,6 +713,11 @@ public class NativeIPGateway extends VisPlugin {
|
||||
return;
|
||||
}
|
||||
|
||||
if (sender == null) {
|
||||
logger.warn("No sender instance, dropping outgoing packet");
|
||||
return;
|
||||
}
|
||||
|
||||
/* Create packet */
|
||||
jpcap.packet.Packet packet = new jpcap.packet.Packet();
|
||||
packet.header = new byte[0];
|
||||
@ -465,9 +729,20 @@ public class NativeIPGateway extends VisPlugin {
|
||||
ether.frametype = EthernetPacket.ETHERTYPE_IP;
|
||||
ether.dst_mac = networkInterfaceMAC;
|
||||
ether.src_mac = networkInterfaceMAC;
|
||||
|
||||
if (loopbackInterface != null) {
|
||||
/* Use zeroed destination MAC (loopback) */
|
||||
ether.dst_mac = new byte[6];
|
||||
ether.dst_mac[0] = 0x0;
|
||||
ether.dst_mac[1] = 0x0;
|
||||
ether.dst_mac[2] = 0x0;
|
||||
ether.dst_mac[3] = 0x0;
|
||||
ether.dst_mac[4] = 0x0;
|
||||
ether.dst_mac[5] = 0x0;
|
||||
}
|
||||
packet.datalink = ether;
|
||||
|
||||
/*logger.info("Sending packet to native network: " + packet.len);*/
|
||||
/*logger.info("Sending packet (" + packet.len + " bytes) to native network: " + sender);*/
|
||||
sender.sendPacket(packet);
|
||||
|
||||
/* Update GUI */
|
||||
@ -504,10 +779,6 @@ public class NativeIPGateway extends VisPlugin {
|
||||
STATE_RUBBISH
|
||||
}
|
||||
|
||||
private SlipState readSlipState = SlipState.STATE_OK;
|
||||
private int readSlipLength = 0;
|
||||
private final int READ_SLIP_BUFFER_SIZE = 256;
|
||||
private byte[] readSlipBuffer = new byte[READ_SLIP_BUFFER_SIZE];
|
||||
private boolean readSlipAccumulated(byte b) {
|
||||
switch (readSlipState) {
|
||||
|
||||
@ -626,23 +897,34 @@ public class NativeIPGateway extends VisPlugin {
|
||||
}
|
||||
|
||||
public void closePlugin() {
|
||||
if (deleteRouteCmd != null) {
|
||||
logger.info("Deleting old route: '" + deleteRouteCmd + "'");
|
||||
if (sender != null) {
|
||||
sender.close();
|
||||
}
|
||||
|
||||
shutdownCaptureThread = true;
|
||||
|
||||
if (shouldDisableLoopbackForwarding) {
|
||||
disableLoopbackForwardingLinux();
|
||||
}
|
||||
if (shouldEnableRPFilter) {
|
||||
enableLoopbackRPFilterLinux();
|
||||
}
|
||||
|
||||
if (restoreRoutesCmd != null) {
|
||||
/*logger.info("Deleting old route: '" + restoreRoutesCmd + "'");*/
|
||||
try {
|
||||
Process routeProcess = Runtime.getRuntime().exec(deleteRouteCmd);
|
||||
logger.info("> " + restoreRoutesCmd);
|
||||
Process routeProcess = Runtime.getRuntime().exec(restoreRoutesCmd);
|
||||
routeProcess.waitFor();
|
||||
} catch (IOException e) {
|
||||
e.printStackTrace();
|
||||
} catch (InterruptedException e) {
|
||||
e.printStackTrace();
|
||||
}
|
||||
deleteRouteCmd = null;
|
||||
restoreRoutesCmd = null;
|
||||
}
|
||||
|
||||
shutdownCaptureThread = true;
|
||||
if (sender != null) {
|
||||
sender.close();
|
||||
}
|
||||
deleteTunInterface();
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user