/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 java.net;
import java.io.FileDescriptor;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectStreamException;
import java.io.ObjectStreamField;
import java.io.Serializable;
import java.security.AccessController;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.StringTokenizer;
import org.apache.harmony.luni.net.NetUtil;
import org.apache.harmony.luni.platform.INetworkSystem;
import org.apache.harmony.luni.platform.Platform;
import org.apache.harmony.luni.util.Inet6Util;
import org.apache.harmony.luni.util.Msg;
import org.apache.harmony.luni.util.PriviAction;
/**
* The Internet Protocol (IP) address class. This class encapsulates an IP
* address and provides name and reverse name resolution functions. The address
* is stored in network order, but as a signed (rather than unsigned) integer.
*/
public class InetAddress extends Object implements Serializable {
final static byte[] any_bytes = { 0, 0, 0, 0 };
final static byte[] localhost_bytes = { 127, 0, 0, 1 };
static InetAddress ANY = new Inet4Address(any_bytes);
private final static INetworkSystem NETIMPL = Platform.getNetworkSystem();
final static InetAddress LOOPBACK = new Inet4Address(localhost_bytes,
"localhost"); //$NON-NLS-1$
private static final String ERRMSG_CONNECTION_REFUSED = "Connection refused"; //$NON-NLS-1$
private static final long serialVersionUID = 3286316764910316507L;
String hostName;
private static class WaitReachable {
}
private transient Object waitReachable = new WaitReachable();
private boolean reached;
private int addrCount;
int family = 2;
byte[] ipaddress;
// Fill in the JNI id caches
private static native void oneTimeInitialization(boolean supportsIPv6);
static {
oneTimeInitialization(true);
}
/**
* Constructs an InetAddress.
*/
InetAddress() {
super();
}
/**
* Constructs an InetAddress, representing the <code>address</code> and
* <code>hostName</code>.
*
* @param address
* network address
*/
InetAddress(byte[] address) {
super();
this.ipaddress = address;
}
/**
* Constructs an InetAddress, representing the <code>address</code> and
* <code>hostName</code>.
*
* @param address
* network address
*/
InetAddress(byte[] address, String hostName) {
super();
this.ipaddress = address;
this.hostName = hostName;
}
CacheElement cacheElement() {
return new CacheElement();
}
/**
* Compares this <code>InetAddress</code> against the specified object.
*
* @param obj
* the object to be tested for equality
* @return boolean true, if the objects are equal
*/
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (obj.getClass() != this.getClass()) {
return false;
}
// now check if their byte arrays match...
byte[] objIPaddress = ((InetAddress) obj).ipaddress;
for (int i = 0; i < objIPaddress.length; i++) {
if (objIPaddress[i] != this.ipaddress[i]) {
return false;
}
}
return true;
}
/**
* Returns the IP address of this <code>InetAddress</code> as an array.
* The elements are in network order (the highest order address byte is in
* the zero-th element).
*
* @return byte[] the address as a byte array
*/
public byte[] getAddress() {
return ipaddress.clone();
}
/**
* Answer the IP addresses of a named host. The host name may either be a
* machine name or a dotted string IP address. If the host name is empty or
* null, an UnknownHostException is thrown. If the host name is a dotted IP
* string, an array with the corresponding single InetAddress is returned.
*
* @param host
* the hostName to be resolved to an address
*
* @return InetAddress[] an array of addresses for the host
* @throws UnknownHostException
* if the address lookup fails
*/
public static InetAddress[] getAllByName(String host)
throws UnknownHostException {
if (host == null || 0 == host.length()) {
return new InetAddress[] { preferIPv6Addresses() ? Inet6Address.LOOPBACK
: LOOPBACK };
}
if (isHostName(host)) {
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkConnect(host, -1);
}
if (Socket.preferIPv4Stack()) {
return getAliasesByNameImpl(host);
}
// ok we may have to re-order to make sure the
// preferIPv6Addresses is respected
InetAddress[] returnedAddresses = getAliasesByNameImpl(host);
InetAddress[] orderedAddresses = null;
if (returnedAddresses != null) {
orderedAddresses = new InetAddress[returnedAddresses.length];
int curPosition = 0;
if (InetAddress.preferIPv6Addresses()) {
for (int i = 0; i < returnedAddresses.length; i++) {
if (returnedAddresses[i] instanceof Inet6Address) {
orderedAddresses[curPosition] = returnedAddresses[i];
curPosition++;
}
}
for (int i = 0; i < returnedAddresses.length; i++) {
if (returnedAddresses[i] instanceof Inet4Address) {
orderedAddresses[curPosition] = returnedAddresses[i];
curPosition++;
}
}
} else {
for (int i = 0; i < returnedAddresses.length; i++) {
if (returnedAddresses[i] instanceof Inet4Address) {
orderedAddresses[curPosition] = returnedAddresses[i];
curPosition++;
}
}
for (int i = 0; i < returnedAddresses.length; i++) {
if (returnedAddresses[i] instanceof Inet6Address) {
orderedAddresses[curPosition] = returnedAddresses[i];
curPosition++;
}
}
}
}
return orderedAddresses;
}
byte[] hBytes = Inet6Util.createByteArrayFromIPAddressString(host);
return (new InetAddress[] { new InetAddress(hBytes) });
}
/**
* Answers the address of a host, given a host string name. The host string
* may be either a machine name or a dotted string IP address. If the
* latter, the hostName field will be determined upon demand.
*
* @param host
* the hostName to be resolved to an address
* @return InetAddress the InetAddress representing the host
*
* @throws UnknownHostException
* if the address lookup fails
*/
public static InetAddress getByName(String host)
throws UnknownHostException {
if (host == null || 0 == host.length()) {
return InetAddress.LOOPBACK;
}
if (host.equals("0")) { //$NON-NLS-1$
return InetAddress.ANY;
}
if (isHostName(host)) {
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkConnect(host, -1);
}
return lookupHostByName(host);
}
return createHostNameFromIPAddress(host);
}
/**
* Answer the dotted string IP address representing this address.
*
* @return String the corresponding dotted string IP address
*/
public String getHostAddress() {
return inetNtoaImpl(bytesToInt(ipaddress, 0));
}
/**
* Answer the host name.
*
* @return String the corresponding string name
*/
public String getHostName() {
try {
if (hostName == null) {
int address = 0;
if (ipaddress.length == 4) {
address = bytesToInt(ipaddress, 0);
if (address == 0) {
return hostName = inetNtoaImpl(address);
}
}
hostName = getHostByAddrImpl(ipaddress).hostName;
if (hostName.equals("localhost") && ipaddress.length == 4 //$NON-NLS-1$
&& address != 0x7f000001) {
return hostName = inetNtoaImpl(address);
}
}
} catch (UnknownHostException e) {
return hostName = Inet6Util
.createIPAddrStringFromByteArray(ipaddress);
}
SecurityManager security = System.getSecurityManager();
try {
// Only check host names, not addresses
if (security != null && isHostName(hostName)) {
security.checkConnect(hostName, -1);
}
} catch (SecurityException e) {
return Inet6Util.createIPAddrStringFromByteArray(ipaddress);
}
return hostName;
}
/**
* Answers canonical name for the host associated with the internet address
*
* @return String string containing the host name
*/
public String getCanonicalHostName() {
String canonicalName;
try {
int address = 0;
if (ipaddress.length == 4) {
address = bytesToInt(ipaddress, 0);
if (address == 0) {
return inetNtoaImpl(address);
}
}
canonicalName = getHostByAddrImpl(ipaddress).hostName;
} catch (UnknownHostException e) {
return Inet6Util.createIPAddrStringFromByteArray(ipaddress);
}
SecurityManager security = System.getSecurityManager();
try {
// Only check host names, not addresses
if (security != null && isHostName(canonicalName)) {
security.checkConnect(canonicalName, -1);
}
} catch (SecurityException e) {
return Inet6Util.createIPAddrStringFromByteArray(ipaddress);
}
return canonicalName;
}
/**
* Answer the local host, if allowed by the security policy. Otherwise,
* answer the loopback address which allows this machine to be contacted.
*
* @return InetAddress the InetAddress representing the local host
* @throws UnknownHostException
* if the address lookup fails
*/
public static InetAddress getLocalHost() throws UnknownHostException {
String host = getHostNameImpl();
SecurityManager security = System.getSecurityManager();
try {
if (security != null) {
security.checkConnect(host, -1);
}
} catch (SecurityException e) {
return InetAddress.LOOPBACK;
}
return lookupHostByName(host);
}
/**
* Answer a hashcode for this IP address.
*
* @return int the hashcode
*/
@Override
public int hashCode() {
return bytesToInt(ipaddress, 0);
}
/**
* Answer true if the InetAddress is an IP multicast address.
*
* @return boolean true, if the address is in the multicast group
*/
public boolean isMulticastAddress() {
return ((ipaddress[0] & 255) >>> 4) == 0xE;
}
static synchronized InetAddress lookupHostByName(String host)
throws UnknownHostException {
int ttl = -1;
String ttlValue = AccessController
.doPrivileged(new PriviAction<String>(
"networkaddress.cache.ttl")); //$NON-NLS-1$
try {
if (ttlValue != null) {
ttl = Integer.decode(ttlValue).intValue();
}
} catch (NumberFormatException e) {
// Ignored
}
CacheElement element = null;
if (ttl == 0) {
Cache.clear();
} else {
element = Cache.get(host);
if (element != null
&& ttl > 0
&& element.timeAdded + (ttl * 1000) < System
.currentTimeMillis()) {
element = null;
}
}
if (element != null) {
return element.inetAddress();
}
// now try the negative cache
String failedMessage = NegativeCache.getFailedMessage(host);
if (failedMessage != null) {
throw new UnknownHostException(host + " - " + failedMessage); //$NON-NLS-1$
}
InetAddress anInetAddress;
try {
anInetAddress = getHostByNameImpl(host, preferIPv6Addresses());
} catch (UnknownHostException e) {
// put the entry in the negative cache
NegativeCache.put(host, e.getMessage());
throw new UnknownHostException(host + " - " + e.getMessage()); //$NON-NLS-1$
}
Cache.add(anInetAddress);
return anInetAddress;
}
/**
* Query the IP stack for aliases for the host. The host is in string name
* form.
*
* @param name
* the host name to lookup
* @throws UnknownHostException
* if an error occurs during lookup
*/
static native InetAddress[] getAliasesByNameImpl(String name)
throws UnknownHostException;
/**
* Query the IP stack for the host address. The host is in address form.
*
* @param addr
* the host address to lookup
* @throws UnknownHostException
* if an error occurs during lookup
*/
static native InetAddress getHostByAddrImpl(byte[] addr)
throws UnknownHostException;
static int inetAddr(String host) throws UnknownHostException {
return (host.equals("255.255.255.255")) ? 0xFFFFFFFF //$NON-NLS-1$
: inetAddrImpl(host);
}
/**
* Convert a string containing an Ipv4 Internet Protocol dotted address into
* a binary address. Note, the special case of '255.255.255.255' throws an
* exception, so this value should not be used as an argument. See also
* inetAddr(String).
*/
static native int inetAddrImpl(String host) throws UnknownHostException;
/**
* Convert a binary address into a string containing an Ipv4 Internet
* Protocol dotted address.
*/
static native String inetNtoaImpl(int hipAddr);
/**
* Query the IP stack for the host address. The host is in string name form.
*
* @param name
* the host name to lookup
* @param preferIPv6Addresses
* address preference if underlying platform is V4/V6
* @return InetAddress the host address
*
* @throws UnknownHostException
* if an error occurs during lookup
*/
static native InetAddress getHostByNameImpl(String name,
boolean preferIPv6Address) throws UnknownHostException;
/**
* Query the IP stack for the host machine name.
*
* @return String the host machine name
*/
static native String getHostNameImpl();
static String getHostNameInternal(String host) throws UnknownHostException {
if (host == null || 0 == host.length()) {
return InetAddress.LOOPBACK.getHostAddress();
}
if (isHostName(host)) {
return lookupHostByName(host).getHostAddress();
}
return host;
}
/**
* Answers a string containing a concise, human-readable description of the
* address.
*
* @return String the description, as host/address
*/
@Override
public String toString() {
return (hostName == null ? "" : hostName) + "/" + getHostAddress(); //$NON-NLS-1$ //$NON-NLS-2$
}
class CacheElement {
long timeAdded = System.currentTimeMillis();
CacheElement next;
public CacheElement() {
super();
}
String hostName() {
return hostName;
}
InetAddress inetAddress() {
return InetAddress.this;
}
}
static class Cache {
static int maxSize = 5;
private static int size = 0;
private static CacheElement head;
static void clear() {
size = 0;
head = null;
}
static void add(InetAddress value) {
CacheElement newElement = value.cacheElement();
if (size < maxSize) {
size++;
} else {
deleteTail();
}
newElement.next = head; // If the head is null, this does no harm.
head = newElement;
}
static CacheElement get(String name) {
CacheElement previous = null;
CacheElement current = head;
boolean notFound = true;
while ((null != current)
&& (notFound = !(name.equals(current.hostName())))) {
previous = current;
current = current.next;
}
if (notFound) {
return null;
}
moveToHead(current, previous);
return current;
}
private static void deleteTail() {
if (0 == size) {
return;
}
if (1 == size) {
head = null;
}
CacheElement previous = null;
CacheElement current = head;
while (null != current.next) {
previous = current;
current = current.next;
}
previous.next = null;
}
private static void moveToHead(CacheElement element,
CacheElement elementPredecessor) {
if (null == elementPredecessor) {
head = element;
} else {
elementPredecessor.next = element.next;
element.next = head;
head = element;
}
}
}
/**
* Answer true if the string is a host name, false if it is an IP Address.
*/
private static boolean isHostName(String value) {
return !(Inet6Util.isValidIPV4Address(value) || Inet6Util
.isValidIP6Address(value));
}
/**
* Answer true if the address is a loop back address. Valid IPv4 loopback
* addresses are 127.d.d.d Valid IPv6 loopback address is ::1
*
* @return boolean
*/
public boolean isLoopbackAddress() {
return false;
}
/**
* Answers true if the address is a link local address.
*
* Valid IPv6 link local addresses are FE80::0 through to
* FEBF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF
*
* There are no valid IPv4 link local addresses.
*
* @return boolean
*/
public boolean isLinkLocalAddress() {
return false;
}
/**
* Answers true if the address is a site local address.
*
* Valid IPv6 link local addresses are FEC0::0 through to
* FEFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF
*
* There are no valid IPv4 site local addresses.
*
* @return boolean
*/
public boolean isSiteLocalAddress() {
return false;
}
/**
* Answers true if the address is a global multicast address.
*
* Valid IPv6 link global multicast addresses are FFxE:/112 where x is a set
* of flags, and the additional 112 bits make up the global multicast
* address space
*
* Valid IPv4 global multicast addresses are between: 224.0.1.0 to
* 238.255.255.255
*
* @return boolean
*/
public boolean isMCGlobal() {
return false;
}
/**
* Answers true if the address is a node local multicast address.
*
* Valid IPv6 node local multicast addresses are FFx1:/112 where x is a set
* of flags, and the additional 112 bits make up the node local multicast
* address space
*
* There are no valid IPv4 node local multicast addresses.
*
* @return boolean
*/
public boolean isMCNodeLocal() {
return false;
}
/**
* Answers true if the address is a link local multicast address.
*
* Valid IPv6 link local multicast addresses are FFx2:/112 where x is a set
* of flags, and the additional 112 bits make up the node local multicast
* address space
*
* Valid IPv4 link-local addresses are between: 224.0.0.0 to 224.0.0.255
*
* @return boolean
*/
public boolean isMCLinkLocal() {
return false;
}
/**
* Answers true if the address is a site local multicast address.
*
* Valid IPv6 site local multicast addresses are FFx5:/112 where x is a set
* of flags, and the additional 112 bits make up the node local multicast
* address space
*
* Valid IPv4 site-local addresses are between: 239.252.0.0 to
* 239.255.255.255
*
* @return boolean
*/
public boolean isMCSiteLocal() {
return false;
}
/**
* Answers true if the address is a organization local multicast address.
*
* Valid IPv6 organization local multicast addresses are FFx8:/112 where x
* is a set of flags, and the additional 112 bits make up the node local
* multicast address space
*
* Valid IPv4 organization-local addresses are between: 239.192.0.0 to
* 239.251.255.255
*
* @return boolean
*/
public boolean isMCOrgLocal() {
return false;
}
/**
* Method isAnyLocalAddress.
*
* @return boolean
*/
public boolean isAnyLocalAddress() {
return false;
}
/**
* Tries to see if the InetAddress is reachable. This method first tries to
* use ICMP(ICMP ECHO REQUEST). When first step fails, the TCP connection on
* port 7 (Echo) shall be lauched.
*
* @param timeout
* timeout in milliseconds
* @return true if address is reachable
* @throws IOException
* if I/O operation meets error
* @throws IllegalArgumentException
* if timeout is less than zero
*/
public boolean isReachable(int timeout) throws IOException {
return isReachable(null, 0, timeout);
}
/**
* Tries to see if the InetAddress is reachable. This method first tries to
* use ICMP(ICMP ECHO REQUEST). When first step fails, the TCP connection on
* port 7 (Echo) shall be lauched.
*
* @param netif
* the network interface through which to connect
* @param ttl
* max hops to live
* @param timeout
* timeout in milliseconds
* @return true if address is reachable
* @throws IOException
* if I/O operation meets error
* @throws IllegalArgumentException
* if ttl or timeout is less than zero
*/
public boolean isReachable(NetworkInterface netif, final int ttl,
final int timeout) throws IOException {
if (0 > ttl || 0 > timeout) {
throw new IllegalArgumentException(Msg.getString("K0051")); //$NON-NLS-1$
}
boolean reachable = false;
if (null == netif) {
// network interface is null, binds to no address
reachable = NETIMPL.isReachableByICMP(this, null, ttl, timeout);
if (!reachable) {
reachable = isReachableByTCP(this, null, timeout);
}
} else {
// Not Bind to any address
if (null == netif.addresses) {
return false;
}
// binds to all address on this NetworkInterface, tries ICMP ping
// first
reachable = isReachableByICMPUseMultiThread(netif, ttl, timeout);
if (!reachable) {
// tries TCP echo if ICMP ping fails
reachable = isReachableByTCPUseMultiThread(netif, ttl, timeout);
}
}
return reachable;
}
/*
* Uses multi-Thread to try if isReachable, returns true if any of threads
* returns in time
*/
private boolean isReachableByMultiThread(NetworkInterface netif,
final int ttl, final int timeout, final boolean isICMP)
throws IOException {
if (null == netif.addresses) {
return false;
}
Enumeration<InetAddress> addresses = netif.getInetAddresses();
reached = false;
addrCount = netif.addresses.length;
boolean needWait = false;
while (addresses.hasMoreElements()) {
final InetAddress addr = addresses.nextElement();
// loopback interface can only reach to local addresses
if (addr.isLoopbackAddress()) {
Enumeration<NetworkInterface> NetworkInterfaces = NetworkInterface
.getNetworkInterfaces();
while (NetworkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = NetworkInterfaces
.nextElement();
Enumeration<InetAddress> localAddresses = networkInterface
.getInetAddresses();
while (localAddresses.hasMoreElements()) {
if (InetAddress.this.equals(localAddresses
.nextElement())) {
return true;
}
}
}
synchronized (waitReachable) {
addrCount--;
if (addrCount == 0) {
// if count equals zero, all thread
// expired,notifies main thread
waitReachable.notifyAll();
}
}
continue;
}
needWait = true;
new Thread() {
@Override
public void run() {
boolean threadReached = false;
// if isICMP, tries ICMP ping, else TCP echo
if (isICMP) {
threadReached = NETIMPL.isReachableByICMP(addr,
InetAddress.this, ttl, timeout);
} else {
try {
threadReached = isReachableByTCP(addr,
InetAddress.this, timeout);
} catch (IOException e) {
// do nothing
}
}
synchronized (waitReachable) {
if (threadReached) {
// if thread reached this address, sets reached to
// true and notifies main thread
reached = true;
waitReachable.notifyAll();
} else {
addrCount--;
if (0 == addrCount) {
// if count equals zero, all thread
// expired,notifies main thread
waitReachable.notifyAll();
}
}
}
}
}.start();
}
if (needWait) {
synchronized (waitReachable) {
try {
while (!reached && (addrCount != 0)) {
// wait for notification
waitReachable.wait(1000);
}
} catch (InterruptedException e) {
// do nothing
}
return reached;
}
}
return false;
}
private boolean isReachableByICMPUseMultiThread(NetworkInterface netif,
int ttl, int timeout) throws IOException {
return isReachableByMultiThread(netif, ttl, timeout, true);
}
private boolean isReachableByTCPUseMultiThread(NetworkInterface netif,
int ttl, int timeout) throws IOException {
return isReachableByMultiThread(netif, ttl, timeout, false);
}
private boolean isReachableByTCP(InetAddress dest, InetAddress source,
int timeout) throws IOException {
FileDescriptor fd = new FileDescriptor();
// define traffic only for parameter
int traffic = 0;
boolean reached = false;
NETIMPL.createSocket(fd, NetUtil.preferIPv4Stack());
try {
if (null != source) {
NETIMPL.bind(fd, 0, source);
}
NETIMPL.connectStreamWithTimeoutSocket(fd, 7, timeout, traffic,
dest);
reached = true;
} catch (IOException e) {
if (ERRMSG_CONNECTION_REFUSED.equals(e.getMessage())) {
// Connection refused means the IP is reachable
reached = true;
}
}
NETIMPL.socketClose(fd);
return reached;
}
/**
* Answers the InetAddress corresponding to the array of bytes. In the case
* of an IPv4 address there must be exactly 4 bytes and for IPv6 exactly 16
* bytes. If not, an UnknownHostException is thrown.
*
* The IP address is not validated by a name service.
*
* The high order byte is <code>ipAddress[0]</code>.
*
* @param ipAddress
* either a 4 (IPv4) or 16 (IPv6) byte array
* @return the InetAddress
*
* @throws UnknownHostException
*/
public static InetAddress getByAddress(byte[] ipAddress)
throws UnknownHostException {
// simply call the method by the same name specifying the default scope
// id of 0
return getByAddress(ipAddress, 0);
}
/**
* Answers the InetAddress corresponding to the array of bytes. In the case
* of an IPv4 address there must be exactly 4 bytes and for IPv6 exactly 16
* bytes. If not, an UnknownHostException is thrown.
*
* The IP address is not validated by a name service.
*
* The high order byte is <code>ipAddress[0]</code>.
*
* @param ipAddress
* either a 4 (IPv4) or 16 (IPv6) byte array
* @param scope_id
* the scope id for an IPV6 scoped address. If not a scoped
* address just pass in 0
* @return the InetAddress
*
* @throws UnknownHostException
*/
static InetAddress getByAddress(byte[] ipAddress, int scope_id)
throws UnknownHostException {
byte[] copy_address;
if (ipAddress != null && ipAddress.length == 4) {
copy_address = new byte[4];
for (int i = 0; i < 4; i++) {
copy_address[i] = ipAddress[i];
}
return new Inet4Address(copy_address);
}
if (ipAddress != null && ipAddress.length == 16) {
// First check to see if the address is an IPv6-mapped
// IPv4 address. If it is, then we can make it a IPv4
// address, otherwise, we'll create an IPv6 address.
if (isIPv4MappedAddress(ipAddress)) {
copy_address = new byte[4];
for (int i = 0; i < 4; i++) {
copy_address[i] = ipAddress[12 + i];
}
return new Inet4Address(copy_address);
}
copy_address = ipAddress.clone();
return new Inet6Address(copy_address, scope_id);
}
// K0339=Invalid IP Address is neither 4 or 16 bytes
throw new UnknownHostException(Msg.getString("K0339")); //$NON-NLS-1$
}
private static boolean isIPv4MappedAddress(byte ipAddress[]) {
// Check if the address matches ::FFFF:d.d.d.d
// The first 10 bytes are 0. The next to are -1 (FF).
// The last 4 bytes are varied.
for (int i = 0; i < 10; i++) {
if (ipAddress[i] != 0) {
return false;
}
}
if (ipAddress[10] != -1 || ipAddress[11] != -1) {
return false;
}
return true;
}
/**
* Answers the InetAddress corresponding to the array of bytes, and the
* given hostname. In the case of an IPv4 address there must be exactly 4
* bytes and for IPv6 exactly 16 bytes. If not, an UnknownHostException is
* thrown.
*
* The host name and IP address are not validated.
*
* The hostname either be a machine alias or a valid IPv6 or IPv4 address
* format.
*
* The high order byte is <code>ipAddress[0]</code>.
*
* @param hostName
* string representation of hostname or ip address
* @param ipAddress
* either a 4 (IPv4) or 16 (IPv6) byte array
* @return the InetAddress
*
* @throws UnknownHostException
*/
public static InetAddress getByAddress(String hostName, byte[] ipAddress)
throws UnknownHostException {
// just call the method by the same name passing in a default scope id
// of 0
return getByAddressInternal(hostName, ipAddress, 0);
}
/**
* Answers the InetAddress corresponding to the array of bytes, and the
* given hostname. In the case of an IPv4 address there must be exactly 4
* bytes and for IPv6 exactly 16 bytes. If not, an UnknownHostException is
* thrown.
*
* The host name and IP address are not validated.
*
* The hostname either be a machine alias or a valid IPv6 or IPv4 address
* format.
*
* The high order byte is <code>ipAddress[0]</code>.
*
* @param hostName
* string representation of hostname or IP address
* @param ipAddress
* either a 4 (IPv4) or 16 (IPv6) byte array
* @param scope_id
* the scope id for a scoped address. If not a scoped address
* just pass in 0
* @return the InetAddress
*
* @throws UnknownHostException
*/
static InetAddress getByAddressInternal(String hostName, byte[] ipAddress,
int scope_id) throws UnknownHostException {
byte[] copy_address;
if (ipAddress != null && ipAddress.length == 4) {
copy_address = new byte[4];
for (int i = 0; i < 4; i++) {
copy_address[i] = ipAddress[i];
}
return new Inet4Address(ipAddress, hostName);
}
if (ipAddress != null && ipAddress.length == 16) {
// First check to see if the address is an IPv6-mapped
// IPv4 address. If it is, then we can make it a IPv4
// address, otherwise, we'll create an IPv6 address.
if (isIPv4MappedAddress(ipAddress)) {
copy_address = new byte[4];
for (int i = 0; i < 4; i++) {
copy_address[i] = ipAddress[12 + i];
}
return new Inet4Address(ipAddress, hostName);
}
copy_address = new byte[16];
for (int i = 0; i < 16; i++) {
copy_address[i] = ipAddress[i];
}
return new Inet6Address(ipAddress, hostName, scope_id);
}
throw new UnknownHostException(Msg.getString("K0332", hostName)); //$NON-NLS-1$
}
/**
* Takes the integer and chops it into 4 bytes, putting it into the byte
* array starting with the high order byte at the index start. This method
* makes no checks on the validity of the parameters.
*/
static void intToBytes(int value, byte bytes[], int start) {
// Shift the int so the current byte is right-most
// Use a byte mask of 255 to single out the last byte.
bytes[start] = (byte) ((value >> 24) & 255);
bytes[start + 1] = (byte) ((value >> 16) & 255);
bytes[start + 2] = (byte) ((value >> 8) & 255);
bytes[start + 3] = (byte) (value & 255);
}
/**
* Takes the byte array and creates an integer out of four bytes starting at
* start as the high-order byte. This method makes no checks on the validity
* of the parameters.
*/
static int bytesToInt(byte bytes[], int start) {
// First mask the byte with 255, as when a negative
// signed byte converts to an integer, it has bits
// on in the first 3 bytes, we are only concerned
// about the right-most 8 bits.
// Then shift the rightmost byte to align with its
// position in the integer.
int value = ((bytes[start + 3] & 255))
| ((bytes[start + 2] & 255) << 8)
| ((bytes[start + 1] & 255) << 16)
| ((bytes[start] & 255) << 24);
return value;
}
/**
* Creates an InetAddress based on an ipAddressString. No error handling is
* performed here.
*/
static InetAddress createHostNameFromIPAddress(String ipAddressString)
throws UnknownHostException {
InetAddress address = null;
if (Inet6Util.isValidIPV4Address(ipAddressString)) {
byte[] byteAddress = new byte[4];
String[] parts = ipAddressString.split("\\."); //$NON-NLS-1$
int length = parts.length;
if (length == 1) {
long value = Long.parseLong(parts[0]);
for (int i = 0; i < 4; i++) {
byteAddress[i] = (byte) (value >> ((3 - i) * 8));
}
} else {
for (int i = 0; i < length; i++) {
byteAddress[i] = (byte) Integer.parseInt(parts[i]);
}
}
// adjust for 2/3 parts address
if (length == 2) {
byteAddress[3] = byteAddress[1];
byteAddress[1] = 0;
}
if (length == 3) {
byteAddress[3] = byteAddress[2];
byteAddress[2] = 0;
}
address = new Inet4Address(byteAddress);
} else { // otherwise it must be ipv6
if (ipAddressString.charAt(0) == '[') {
ipAddressString = ipAddressString.substring(1, ipAddressString
.length() - 1);
}
StringTokenizer tokenizer = new StringTokenizer(ipAddressString,
":.%", true); //$NON-NLS-1$
ArrayList<String> hexStrings = new ArrayList<String>();
ArrayList<String> decStrings = new ArrayList<String>();
String scopeString = null;
String token = ""; //$NON-NLS-1$
String prevToken = ""; //$NON-NLS-1$
String prevPrevToken = ""; //$NON-NLS-1$
int doubleColonIndex = -1; // If a double colon exists, we need to
// insert 0s.
// Go through the tokens, including the separators ':' and '.'
// When we hit a : or . the previous token will be added to either
// the hex list or decimal list. In the case where we hit a ::
// we will save the index of the hexStrings so we can add zeros
// in to fill out the string
while (tokenizer.hasMoreTokens()) {
prevPrevToken = prevToken;
prevToken = token;
token = tokenizer.nextToken();
if (token.equals(":")) { //$NON-NLS-1$
if (prevToken.equals(":")) { //$NON-NLS-1$
doubleColonIndex = hexStrings.size();
} else if (!prevToken.equals("")) { //$NON-NLS-1$
hexStrings.add(prevToken);
}
} else if (token.equals(".")) { //$NON-NLS-1$
decStrings.add(prevToken);
} else if (token.equals("%")) { //$NON-NLS-1$
// add the last word before the % properly
if (!prevToken.equals(":") && !prevToken.equals(".")) { //$NON-NLS-1$ //$NON-NLS-2$
if (prevPrevToken.equals(":")) { //$NON-NLS-1$
hexStrings.add(prevToken);
} else if (prevPrevToken.equals(".")) { //$NON-NLS-1$
decStrings.add(prevToken);
}
}
// the rest should be the scope string
scopeString = tokenizer.nextToken();
while (tokenizer.hasMoreTokens()) {
scopeString = scopeString + tokenizer.nextToken();
}
}
}
if (prevToken.equals(":")) { //$NON-NLS-1$
if (token.equals(":")) { //$NON-NLS-1$
doubleColonIndex = hexStrings.size();
} else {
hexStrings.add(token);
}
} else if (prevToken.equals(".")) { //$NON-NLS-1$
decStrings.add(token);
}
// figure out how many hexStrings we should have
// also check if it is a IPv4 address
int hexStringsLength = 8;
// If we have an IPv4 address tagged on at the end, subtract
// 4 bytes, or 2 hex words from the total
if (decStrings.size() > 0) {
hexStringsLength -= 2;
}
// if we hit a double Colon add the appropriate hex strings
if (doubleColonIndex != -1) {
int numberToInsert = hexStringsLength - hexStrings.size();
for (int i = 0; i < numberToInsert; i++) {
hexStrings.add(doubleColonIndex, "0"); //$NON-NLS-1$
}
}
byte ipByteArray[] = new byte[16];
// Finally convert these strings to bytes...
for (int i = 0; i < hexStrings.size(); i++) {
Inet6Util.convertToBytes(hexStrings.get(i), ipByteArray, i * 2);
}
// Now if there are any decimal values, we know where they go...
for (int i = 0; i < decStrings.size(); i++) {
ipByteArray[i + 12] = (byte) (Integer.parseInt(decStrings
.get(i)) & 255);
}
// now check to see if this guy is actually and IPv4 address
// an ipV4 address is ::FFFF:d.d.d.d
boolean ipV4 = true;
for (int i = 0; i < 10; i++) {
if (ipByteArray[i] != 0) {
ipV4 = false;
break;
}
}
if (ipByteArray[10] != -1 || ipByteArray[11] != -1) {
ipV4 = false;
}
if (ipV4) {
byte ipv4ByteArray[] = new byte[4];
for (int i = 0; i < 4; i++) {
ipv4ByteArray[i] = ipByteArray[i + 12];
}
address = InetAddress.getByAddress(ipv4ByteArray);
} else {
int scopeId = 0;
if (scopeString != null) {
try {
scopeId = Integer.parseInt(scopeString);
} catch (Exception e) {
// this should not occur as we should not get into this
// function unless the address is in a valid format
}
}
address = InetAddress.getByAddress(ipByteArray, scopeId);
}
}
return address;
}
static boolean preferIPv6Addresses() {
String result = AccessController.doPrivileged(new PriviAction<String>(
"java.net.preferIPv6Addresses")); //$NON-NLS-1$
return "true".equals(result); //$NON-NLS-1$
}
private static final ObjectStreamField[] serialPersistentFields = {
new ObjectStreamField("address", Integer.TYPE), //$NON-NLS-1$
new ObjectStreamField("family", Integer.TYPE), //$NON-NLS-1$
new ObjectStreamField("hostName", String.class) }; //$NON-NLS-1$
private void writeObject(ObjectOutputStream stream) throws IOException {
ObjectOutputStream.PutField fields = stream.putFields();
if (ipaddress == null) {
fields.put("address", 0); //$NON-NLS-1$
} else {
fields.put("address", bytesToInt(ipaddress, 0)); //$NON-NLS-1$
}
fields.put("family", family); //$NON-NLS-1$
fields.put("hostName", hostName); //$NON-NLS-1$
stream.writeFields();
}
private void readObject(ObjectInputStream stream) throws IOException,
ClassNotFoundException {
ObjectInputStream.GetField fields = stream.readFields();
int addr = fields.get("address", 0); //$NON-NLS-1$
ipaddress = new byte[4];
intToBytes(addr, ipaddress, 0);
hostName = (String) fields.get("hostName", null); //$NON-NLS-1$
family = fields.get("family", 2); //$NON-NLS-1$
}
private Object readResolve() throws ObjectStreamException {
return new Inet4Address(ipaddress, hostName);
}
}