/** Returns the address */
public InetAddress getAddress() {
try {
if (name == null) return InetAddress.getByAddress(address);
else return InetAddress.getByAddress(name.toString(), address);
} catch (UnknownHostException e) {
return null;
}
}
/** Returns the Internet address */
public InetAddress getAddress() {
try {
return InetAddress.getByAddress(toArray(addr));
} catch (UnknownHostException e) {
return null;
}
}
/*
* Returns the string representation of the address that this
* listen key represents.
*/
public String address() {
InetAddress address = ss.getInetAddress();
/*
* If bound to the wildcard address then use current local
* hostname. In the event that we don't know our own hostname
* then assume that host supports IPv4 and return something to
* represent the loopback address.
*/
if (address.isAnyLocalAddress()) {
try {
address = InetAddress.getLocalHost();
} catch (UnknownHostException uhe) {
byte[] loopback = {0x7f, 0x00, 0x00, 0x01};
try {
address = InetAddress.getByAddress("127.0.0.1", loopback);
} catch (UnknownHostException x) {
throw new InternalError("unable to get local hostname");
}
}
}
/*
* Now decide if we return a hostname or IP address. Where possible
* return a hostname but in the case that we are bound to an
* address that isn't registered in the name service then we
* return an address.
*/
String result;
String hostname = address.getHostName();
String hostaddr = address.getHostAddress();
if (hostname.equals(hostaddr)) {
if (address instanceof Inet6Address) {
result = "[" + hostaddr + "]";
} else {
result = hostaddr;
}
} else {
result = hostname;
}
/*
* Finally return "hostname:port", "ipv4-address:port" or
* "[ipv6-address]:port".
*/
return result + ":" + ss.getLocalPort();
}
private void init() throws IOException {
messageBuffer = new ArrayList();
receiveBuffer = ByteBuffer.allocate(CAPACITY);
sendBuffer = ByteBuffer.allocate(CAPACITY);
buf = new byte[CAPACITY];
channel = DatagramChannel.open();
channel.configureBlocking(false);
InetAddress host = null;
if (getAddress() != null) {
host = InetAddress.getByAddress(getAddress().getBytes());
}
channel.socket().bind(new InetSocketAddress(host, getPort()));
channel.socket().setReceiveBufferSize(CAPACITY);
certifier = new MessageCertifier(this);
extractor = new MessageExtractor(this);
}
/** Converts rdata to a String */
public String rrToString() {
InetAddress addr;
try {
addr = InetAddress.getByAddress(null, address);
} catch (UnknownHostException e) {
return null;
}
if (addr.getAddress().length == 4) {
// Deal with Java's broken handling of mapped IPv4 addresses.
StringBuffer sb = new StringBuffer("0:0:0:0:0:ffff:");
int high = ((address[12] & 0xFF) << 8) + (address[13] & 0xFF);
int low = ((address[14] & 0xFF) << 8) + (address[15] & 0xFF);
sb.append(Integer.toHexString(high));
sb.append(':');
sb.append(Integer.toHexString(low));
return sb.toString();
}
return addr.getHostAddress();
}
private void getRequestV4() throws IOException {
int ver = in.read();
int cmd = in.read();
if (ver == -1 || cmd == -1) {
// EOF
in.close();
out.close();
return;
}
if (ver != 0 && ver != 4) {
out.write(PROTO_VERS4);
out.write(91); // Bad Request
out.write(0);
out.write(0);
out.write(0);
out.write(0);
out.write(0);
out.write(0);
out.write(0);
out.flush();
purge();
out.close();
in.close();
return;
}
if (cmd == CONNECT) {
int port = ((in.read() & 0xff) << 8);
port += (in.read() & 0xff);
byte[] buf = new byte[4];
readBuf(in, buf);
InetAddress addr = InetAddress.getByAddress(buf);
// We don't use the username...
int c;
do {
c = (in.read() & 0xff);
} while (c != 0);
boolean ok = true;
try {
dest = new Socket(addr, port);
} catch (IOException e) {
ok = false;
}
if (!ok) {
out.write(PROTO_VERS4);
out.write(91);
out.write(0);
out.write(0);
out.write(buf);
out.flush();
purge();
out.close();
in.close();
return;
}
out.write(PROTO_VERS4);
out.write(90); // Success
out.write((port >> 8) & 0xff);
out.write(port & 0xff);
out.write(buf);
out.flush();
InputStream in2 = dest.getInputStream();
OutputStream out2 = dest.getOutputStream();
Tunnel tunnel = new Tunnel(in2, out);
tunnel.start();
int b = 0;
do {
try {
b = in.read();
if (b == -1) {
in.close();
out2.close();
return;
}
out2.write(b);
} catch (IOException ex) {
}
} while (!client.isClosed());
}
}
static void pinging() throws IOException {
Socket mySocket;
if (!inetAddresses.isEmpty()) {
bcid =
((InterfaceAddress) inetAddresses.get(0))
.getBroadcast()
.getAddress(); // gets the last ip address in subnet
netaddress(
((InterfaceAddress) inetAddresses.get(0))
.getNetworkPrefixLength(), // creats the mask field
((InterfaceAddress) inetAddresses.get(0))
.getAddress()
.getAddress() // creats the myip field
);
byte[] pingip = netid;
for (; ; ) {
InetAddress ping = InetAddress.getByAddress(pingip);
// boolean reachable=ping.isReachable(5000); // This command is doing the same work as
// the ping command in windows
try {
Process ps = Runtime.getRuntime().exec("ping.exe " + ping);
BufferedReader br = new BufferedReader(new InputStreamReader(ps.getInputStream()));
StringBuilder sb = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
sb.append(line);
sb.append("\n");
}
y = sb.toString();
System.out.print(sb.toString());
} catch (IOException e) {
e.printStackTrace();
}
if (!contains(y, substring)) {
System.out.println("The ip address " + ping + "is reachable");
for (int port = 0; port < 65536; port++) {
try {
mySocket = new Socket(ping, port);
System.out.println("The port" + port + "on ip:" + ping + "is free.");
mySocket.close();
} catch (IOException c) {
System.out.println("The port" + port + "on ip:" + ping + "is closed.");
}
}
} else
System.out.println(
"The pinged ip addres is unreachable, probably it is not up in your subnet");
pingip[3]++;
if (pingip[3] == (byte) 255) pingip[2]++;
if (pingip[2]
== (byte)
255) // here we ping ips in our subnet from the first ip address to the last one
pingip[1]++;
if (pingip[1] == (byte) 255) pingip[0]++;
if (pingip[0]
== (byte)
127) // beacuase the ip addresses that are not in class A have at least 2 bytes of
// net ids
break;
if (pingip[0] == bcid[0]
& pingip[1] == bcid[1]
& pingip[2] == bcid[2]
& pingip[3] == bcid[3]) break;
}
} else System.out.println("null pointer exception");
}
/** {@inheritDoc} */
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
super.readExternal(in);
addr = InetAddress.getByAddress(U.readByteArray(in));
}
void rrFromWire(DNSInput in) throws IOException {
address = InetAddress.getByAddress(name.toString(), in.readByteArray(16));
}
