[cooja] interfaces/IPAddress: Reimplementation of the IPAddress interface

New features:
* extended interface
* Shows all IPv6 addresses of a mote
* Shows link local IP in visualizer
* Reads IPs correctly from different memory layouts
This commit is contained in:
Enrico Joerns 2014-02-21 03:06:14 +01:00
parent f93b58b9fb
commit 01333c235c
2 changed files with 280 additions and 78 deletions

View file

@ -1,4 +1,5 @@
/*
* Copyright (c) 2014, TU Braunschweig.
* Copyright (c) 2006, Swedish Institute of Computer Science.
* All rights reserved.
*
@ -26,151 +27,279 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
package org.contikios.cooja.interfaces;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.Observable;
import java.util.Observer;
import javax.swing.JLabel;
import javax.swing.JPanel;
import org.apache.log4j.Logger;
import org.jdom.Element;
import org.contikios.cooja.ClassDescription;
import org.contikios.cooja.Mote;
import org.contikios.cooja.MoteInterface;
import org.contikios.cooja.mote.memory.MemoryInterface;
import org.contikios.cooja.mote.memory.MemoryInterface.SegmentMonitor;
import org.contikios.cooja.mote.memory.MemoryLayout;
import org.contikios.cooja.mote.memory.VarMemory;
import org.contikios.cooja.util.IPUtils;
import org.jdom.Element;
/**
* Read-only interface to IPv4 or IPv6 address.
*
* @author Fredrik Osterlind
* @author Enrico Joerns
*/
@ClassDescription("IP Address")
@ClassDescription("IP Addresses")
public class IPAddress extends MoteInterface {
private static Logger logger = Logger.getLogger(IPAddress.class);
private final VarMemory moteMem;
private static final Logger logger = Logger.getLogger(IPAddress.class);
private static final int IPv6_MAX_ADDRESSES = 4;
private boolean ipv6IsGlobal = false;
private int ipv6AddressIndex = -1;
private static final int MONITORED_SIZE = 150;
private SegmentMonitor memMonitor;
private enum IPv {
NONE,
IPv4,
IPv6
}
private final IPv ipVersion;
private final VarMemory moteMem;
private final MemoryLayout memLayout;
private IPContainer localIPAddr = null;
private final SegmentMonitor memMonitor;
private List<IPContainer> ipList = new LinkedList<>();
private int ipv6_addr_size = 0;
private int ipv6_addr_list_offset = 0;
public IPAddress(final Mote mote) {
moteMem = new VarMemory(mote.getMemory());
memLayout = mote.getMemory().getLayout();
/* If the ip memory sections changed, we recalculate addresses
* and notify our observers.*/
memMonitor = new MemoryInterface.SegmentMonitor() {
int accessCount = 0;
long lastAccess = 0;
@Override
public void memoryChanged(MemoryInterface memory, SegmentMonitor.EventType type, long address) {
if (type != SegmentMonitor.EventType.WRITE) {
return;
}
setChanged();
notifyObservers();
/* XXX Quick & Dirty IPv4 update handle */
if (ipVersion == IPv.IPv4) {
updateIPAddresses();
setChanged();
notifyObservers();
return;
}
/* Wait until size and offsest values are set initially,
* then add memory monitor for each ip field */
if ((ipv6_addr_list_offset == 0) || (ipv6_addr_size == 0)) {
ipv6_addr_list_offset = moteMem.getByteValueOf("uip_ds6_netif_addr_list_offset");
ipv6_addr_size = moteMem.getByteValueOf("uip_ds6_addr_size");
/* If the variables just updated, add the final ip listeners */
if ((ipv6_addr_list_offset != 0) && (ipv6_addr_size != 0)) {
/* Add monitor for each IP region */
for (int i = 0; i < IPv6_MAX_ADDRESSES; i++) {
long addr_of_ip = moteMem.getVariableAddress("uip_ds6_if") // start address of interface
+ ipv6_addr_list_offset // offset to ip address region
+ i * ipv6_addr_size // offset to ith ip address
+ 1 + memory.getLayout().getPaddingBytesFor(
MemoryLayout.DataType.INT8,
MemoryLayout.DataType.INT16); // skip 'isused'
moteMem.addMemoryMonitor(
EventType.WRITE,
addr_of_ip,
16, /* Size of ip address in byte */
memMonitor);
}
/* Initial scan for IP address */
updateIPAddresses();
if (ipList.size() > 0) {
setChanged();
notifyObservers();
}
/** @TODO: Remove other listeners? */
}
} else {
/** Note: works when 'isused' bit is set first
* and address region is written sequentially */
/* check for sequential reading of 16 byte block */
if (address == lastAccess + 1) {
accessCount++;
lastAccess = address;
if (accessCount == 16) {
updateIPAddresses();
setChanged();
notifyObservers();
lastAccess = 0;
}
}
else {
/* Check if ip write was interrupted unexpectedly last time */
if (lastAccess != 0) {
updateIPAddresses();
setChanged();
notifyObservers();
}
accessCount = 1;
lastAccess = address;
}
}
}
};
if (isVersion4()) {
moteMem.addVarMonitor(SegmentMonitor.EventType.WRITE, "uip_hostaddr", memMonitor);
} else if (isVersion6()) {
moteMem.addVarMonitor(SegmentMonitor.EventType.WRITE, "uip_ds6_netif_addr_list_offset", memMonitor);
moteMem.addVarMonitor(SegmentMonitor.EventType.WRITE, "uip_ds6_addr_size", memMonitor);
moteMem.addVarMonitor(SegmentMonitor.EventType.WRITE, "uip_ds6_if", memMonitor);
/* Determine IP version an add MemoryMonitors */
if (moteMem.variableExists("uip_hostaddr")) {
logger.debug("IPv4 detected");
ipVersion = IPv.IPv4;
moteMem.addVarMonitor(
SegmentMonitor.EventType.WRITE,
"uip_hostaddr",
memMonitor);
} else if (moteMem.variableExists("uip_ds6_netif_addr_list_offset")
&& moteMem.variableExists("uip_ds6_addr_size")
&& moteMem.variableExists("uip_ds6_if")) {
logger.debug("IPv6 detected");
ipVersion = IPv.IPv6;
moteMem.addVarMonitor(
SegmentMonitor.EventType.WRITE,
"uip_ds6_netif_addr_list_offset",
memMonitor);
moteMem.addVarMonitor(
SegmentMonitor.EventType.WRITE,
"uip_ds6_addr_size",
memMonitor);
} else {
ipVersion = IPv.NONE;
}
// initially look for IPs we already have
updateIPAddresses();
}
/**
* Returns true if any IP stack (Ipv4/6) is supported by mote
* @return true if either IPv4 or IPv6 was detected
*/
public boolean hasIP() {
return !(ipVersion == IPv.NONE);
}
/**
* Get local IP of mote.
* @return local IP or null if not existing
*/
public IPContainer getLocalIP() {
return localIPAddr;
}
/**
* Returns IP address string.
* Supports both IPv4 and IPv6 addresses.
*
* @param idx
* @return IP address string
*/
public String getIPString() {
if (isVersion4()) {
byte[] ip = moteMem.getByteArray("uip_hostaddr", 4);
return IPUtils.getIPv4AddressString(ip);
} else if (isVersion6()) {
return IPUtils.getCompressedIPv6AddressString(getIPv6Address());
public IPContainer getIP(int idx) {
try {
return ipList.get(idx);
} catch (IndexOutOfBoundsException ex) {
logger.warn("Invalid IP index " + idx);
return null;
}
return null;
}
public byte[] getIPv6Address() {
byte[] ip = null;
/**
* Rereads IP addresses from memory and updates localIP entry.
*/
private void updateIPAddresses() {
ipList.clear();
if (ipVersion == IPv.IPv4) {
addIPv4Addresses();
localIPAddr = ipList.get(0);
}
else if (ipVersion == IPv.IPv6) {
addIPv6Addresses();
/* look for local ip addr */
for (IPContainer c : ipList) {
if (!c.isGlobal) {
localIPAddr = c;
}
}
}
}
/**
* Rereads IPv4 addresses from memory.
*/
private void addIPv4Addresses() {
ipList.add(new IPContainer(0, moteMem.getByteArray("uip_hostaddr", 4), true));
}
/**
* Rereads IPv6 addresses from memory.
*/
private void addIPv6Addresses() {
/* IpV6: Struct sizes and offsets */
int ipv6NetworkInterfaceAddressOffset = moteMem.getByteValueOf("uip_ds6_netif_addr_list_offset");
int ipv6AddressStructSize = moteMem.getByteValueOf("uip_ds6_addr_size");
/* check if addresses were not set yet */
if (ipv6NetworkInterfaceAddressOffset == 0 || ipv6AddressStructSize == 0) {
return null;
return;
}
/* TODO No need to copy the entire array! */
byte[] structData = moteMem.getByteArray(
"uip_ds6_if",
ipv6NetworkInterfaceAddressOffset + IPv6_MAX_ADDRESSES * ipv6AddressStructSize);
ipv6AddressIndex = -1;
moteMem.getVariableAddress("uip_ds6_if") + ipv6NetworkInterfaceAddressOffset,
IPv6_MAX_ADDRESSES * ipv6AddressStructSize);
for (int addressIndex = 0; addressIndex < IPv6_MAX_ADDRESSES; addressIndex++) {
int offset = ipv6NetworkInterfaceAddressOffset + addressIndex * ipv6AddressStructSize;
int offset = addressIndex * ipv6AddressStructSize;
byte isUsed = structData[offset];
if (isUsed == 0) {
continue;
}
byte[] addressData = new byte[16];
System.arraycopy(
structData, offset + 2/* ipaddr offset */,
structData, offset + 1 + memLayout.getPaddingBytesFor(
MemoryLayout.DataType.INT8,
MemoryLayout.DataType.INT16),/* ipaddr offset */
addressData, 0, 16);
if (addressData[0] == (byte) 0xFE && addressData[1] == (byte) 0x80) {
ipv6IsGlobal = false;
} else {
ipv6IsGlobal = true;
if (((addressData[0] & (byte) 0xFF) == (byte) 0xFE) && ((addressData[1] & (byte) 0xFF) == (byte) 0x80)) {
ipList.add(new IPContainer(addressIndex, addressData, false));
}
else {
ipList.add(new IPContainer(addressIndex, addressData, true));
}
ip = addressData;
ipv6AddressIndex = addressIndex;
if (ipv6IsGlobal) {
break;
}
}
if (ip == null) {
ip = new byte[16];
ipv6AddressIndex = -1;
}
return ip;
}
/**
* @return True if mote has an IPv4 address
*/
public boolean isVersion4() {
return moteMem.variableExists("uip_hostaddr");
}
/**
* @return True if mote has an IPv6 address
*/
public boolean isVersion6() {
return moteMem.variableExists("uip_ds6_netif_addr_list_offset")
&& moteMem.variableExists("uip_ds6_addr_size")
&& moteMem.variableExists("uip_ds6_if");
}
// -- MoteInterface overrides
@Override
public void removed() {
super.removed();
if (memMonitor != null) {
if (isVersion4()) {
moteMem.removeVarMonitor("rimeaddr_node_addr", memMonitor);
} else if (isVersion6()) {
if (ipVersion == IPv.IPv4) {
moteMem.removeVarMonitor("uip_hostaddr",memMonitor);
}
else if (ipVersion == IPv.IPv6) {
moteMem.removeVarMonitor("uip_ds6_netif_addr_list_offset", memMonitor);
moteMem.removeVarMonitor("uip_ds6_addr_size", memMonitor);
moteMem.removeVarMonitor("uip_ds6_if", memMonitor);
@ -187,14 +316,28 @@ public class IPAddress extends MoteInterface {
this.addObserver(observer = new Observer() {
@Override
public void update(Observable obs, Object obj) {
if (isVersion4()) {
ipLabel.setText("IPv4 address: " + getIPString());
} else if (isVersion6()) {
ipLabel.setText((ipv6IsGlobal ? "Global" : "Local")
+ " IPv6 address(#" + ipv6AddressIndex + "): " + getIPString());
} else {
ipLabel.setText("Unknown IP");
StringBuilder ipStr = new StringBuilder();
ipStr.append("<html>");
for (IPContainer ipc: ipList) {
if (ipVersion == IPv.IPv4) {
ipStr.append("IPv4 address: ")
.append(ipc.toString())
.append("<br>");
}
else if (ipVersion == IPv.IPv6) {
ipStr.append(ipc.isGlobal() ? "Global" : "Local")
.append(" IPv6 address(#")
.append(ipc.getAddID())
.append("): ")
.append(ipc.toString())
.append("<br>");
}
else {
ipStr.append("Unknown IP<br>");
}
}
ipStr.append("</html>");
ipLabel.setText(ipStr.toString());
}
});
observer.update(null, null);
@ -223,4 +366,60 @@ public class IPAddress extends MoteInterface {
@Override
public void setConfigXML(Collection<Element> configXML, boolean visAvailable) {
}
/**
* Holds a single IP address.
*
* Note: The compressed IP version is already computed in constructor
*/
public class IPContainer {
private boolean isGlobal = false;
private final byte[] ip;
private final int addrIdx;
private final String cprString;
public IPContainer(int addidx, byte[] ip, boolean global) {
this.addrIdx = addidx;
this.ip = ip;
this.isGlobal = global;
if (ipVersion == IPv.IPv4) {
cprString = IPUtils.getIPv4AddressString(ip);
} else if (ipVersion == IPv.IPv6) {
cprString = IPUtils.getCompressedIPv6AddressString(ip);
} else {
cprString = "";
}
/* logger.info("Added new IP: " + cprString); */
}
public int getAddID() {
return addrIdx;
}
public boolean isGlobal() {
return isGlobal;
}
public byte[] getIP() {
return ip;
}
@Override
public String toString() {
return cprString;
}
public String toUncompressedString() {
if (ipVersion == IPv.IPv4) {
return cprString;
}
else if (ipVersion == IPv.IPv6) {
return IPUtils.getUncompressedIPv6AddressString(ip);
}
else {
return "";
}
}
}
}

View file

@ -128,8 +128,11 @@ public class AddressVisualizerSkin implements VisualizerSkin {
private static String getMoteString(Mote mote) {
IPAddress ipAddr = mote.getInterfaces().getIPAddress();
if (ipAddr != null && ipAddr.getIPString() != null) {
return ipAddr.getIPString();
if ((ipAddr != null) && (ipAddr.hasIP())) {
if (ipAddr.getLocalIP() == null) {
return "";
}
return ipAddr.getLocalIP().toString();
}
RimeAddress rimeAddr = mote.getInterfaces().getRimeAddress();