| Methods Summary |
|---|
| public boolean | equals(java.lang.Object obj)Compares this object against the specified object.
The result is true if and only if the argument is
not null and it represents the same NetworkInterface
as this object.
Two instances of NetworkInterface represent the same
NetworkInterface if both name and addrs are the same for both.
if ((obj == null) || !(obj instanceof NetworkInterface)) {
return false;
}
NetworkInterface netIF = (NetworkInterface)obj;
if (name != null ) {
if (netIF.getName() != null) {
if (!name.equals(netIF.getName())) {
return false;
}
} else {
return false;
}
} else {
if (netIF.getName() != null) {
return false;
}
}
Enumeration newAddrs = netIF.getInetAddresses();
int i = 0;
for (i = 0; newAddrs.hasMoreElements();newAddrs.nextElement(), i++);
if (addrs == null) {
if (i != 0) {
return false;
}
} else {
/*
* Compare number of addresses (in the checked subset)
*/
int count = 0;
Enumeration e = getInetAddresses();
for (; e.hasMoreElements(); count++) {
e.nextElement();
}
if (i != count) {
return false;
}
}
newAddrs = netIF.getInetAddresses();
for (; newAddrs.hasMoreElements();) {
boolean equal = false;
Enumeration thisAddrs = getInetAddresses();
InetAddress newAddr = (InetAddress)newAddrs.nextElement();
for (; thisAddrs.hasMoreElements();) {
InetAddress thisAddr = (InetAddress)thisAddrs.nextElement();
if (thisAddr.equals(newAddr)) {
equal = true;
}
}
if (!equal) {
return false;
}
}
return true;
|
| private static native java.net.NetworkInterface[] | getAll()
|
| private static native java.net.Inet4Address | getBroadcast0(java.lang.String name, int ind)
|
| static native java.net.NetworkInterface | getByIndex(int index)Get a network interface given its index.
|
| public static java.net.NetworkInterface | getByInetAddress(java.net.InetAddress addr)Convenience method to search for a network interface that
has the specified Internet Protocol (IP) address bound to
it.
If the specified IP address is bound to multiple network
interfaces it is not defined which network interface is
returned.
if (addr == null)
throw new NullPointerException();
return getByInetAddress0(addr);
|
| private static native java.net.NetworkInterface | getByInetAddress0(java.net.InetAddress addr)
|
| public static java.net.NetworkInterface | getByName(java.lang.String name)Searches for the network interface with the specified name.
if (name == null)
throw new NullPointerException();
return getByName0(name);
|
| private static native java.net.NetworkInterface | getByName0(java.lang.String name)
|
| public java.lang.String | getDisplayName()Get the display name of this network interface.
A display name is a human readable String describing the network
device.
return displayName;
|
| public byte[] | getHardwareAddress()Returns the hardware address (usually MAC) of the interface if it
has one and if it can be accessed given the current privileges.
for (InetAddress addr : addrs) {
if (addr instanceof Inet4Address) {
return getMacAddr0(((Inet4Address)addr).getAddress(), name, index);
}
}
return getMacAddr0(null, name, index);
|
| int | getIndex()Get the index of this network interface.
return index;
|
| public java.util.Enumeration | getInetAddresses()Convenience method to return an Enumeration with all or a
subset of the InetAddresses bound to this network interface.
If there is a security manager, its checkConnect
method is called for each InetAddress. Only InetAddresses where
the checkConnect doesn't throw a SecurityException
will be returned in the Enumeration.
class checkedAddresses implements Enumeration<InetAddress> {
private int i=0, count=0;
private InetAddress local_addrs[];
checkedAddresses() {
local_addrs = new InetAddress[addrs.length];
SecurityManager sec = System.getSecurityManager();
for (int j=0; j<addrs.length; j++) {
try {
if (sec != null) {
sec.checkConnect(addrs[j].getHostAddress(), -1);
}
local_addrs[count++] = addrs[j];
} catch (SecurityException e) { }
}
}
public InetAddress nextElement() {
if (i < count) {
return local_addrs[i++];
} else {
throw new NoSuchElementException();
}
}
public boolean hasMoreElements() {
return (i < count);
}
}
return new checkedAddresses();
|
| public java.util.List | getInterfaceAddresses()Get a List of all or a subset of the InterfaceAddresses
of this network interface.
If there is a security manager, its checkConnect
method is called with the InetAddress for each InterfaceAddress.
Only InterfaceAddresses where the checkConnect doesn't throw
a SecurityException will be returned in the List.
java.util.List<InterfaceAddress> lst = new java.util.ArrayList<InterfaceAddress>(1);
SecurityManager sec = System.getSecurityManager();
for (int j=0; j<bindings.length; j++) {
try {
if (sec != null) {
sec.checkConnect(bindings[j].getAddress().getHostAddress(), -1);
}
lst.add(bindings[j]);
} catch (SecurityException e) { }
}
return lst;
|
| public int | getMTU()Returns the Maximum Transmission Unit (MTU) of this interface.
return getMTU0(name, index);
|
| private static native int | getMTU0(java.lang.String name, int ind)
|
| private static native byte[] | getMacAddr0(byte[] inAddr, java.lang.String name, int ind)
|
| public java.lang.String | getName()Get the name of this network interface.
return name;
|
| public static java.util.Enumeration | getNetworkInterfaces()Returns all the interfaces on this machine. Returns null if no
network interfaces could be found on this machine.
NOTE: can use getNetworkInterfaces()+getInetAddresses()
to obtain all IP addresses for this node
final NetworkInterface[] netifs = getAll();
// specified to return null if no network interfaces
if (netifs == null)
return null;
return new Enumeration<NetworkInterface>() {
private int i = 0;
public NetworkInterface nextElement() {
if (netifs != null && i < netifs.length) {
NetworkInterface netif = netifs[i++];
return netif;
} else {
throw new NoSuchElementException();
}
}
public boolean hasMoreElements() {
return (netifs != null && i < netifs.length);
}
};
|
| public java.net.NetworkInterface | getParent()Returns the parent NetworkInterface of this interface if this is
a subinterface, or null if it is a physical
(non virtual) interface or has no parent.
return parent;
|
| public java.util.Enumeration | getSubInterfaces()Get an Enumeration with all the subinterfaces (also known as virtual
interfaces) attached to this network interface.
For instance eth0:1 will be a subinterface to eth0.
class subIFs implements Enumeration<NetworkInterface> {
private int i=0;
subIFs() {
}
public NetworkInterface nextElement() {
if (i < childs.length) {
return childs[i++];
} else {
throw new NoSuchElementException();
}
}
public boolean hasMoreElements() {
return (i < childs.length);
}
}
return new subIFs();
|
| private static native long | getSubnet0(java.lang.String name, int ind)
|
| public int | hashCode()
int count = 0;
if (addrs != null) {
for (int i = 0; i < addrs.length; i++) {
count += addrs[i].hashCode();
}
}
return count;
|
| private static native void | init()
|
| public boolean | isLoopback()Returns whether a network interface is a loopback interface.
return isLoopback0(name, index);
|
| private static native boolean | isLoopback0(java.lang.String name, int ind)
|
| private static native boolean | isP2P0(java.lang.String name, int ind)
|
| public boolean | isPointToPoint()Returns whether a network interface is a point to point interface.
A typical point to point interface would be a PPP connection through
a modem.
return isP2P0(name, index);
|
| public boolean | isUp()Returns whether a network interface is up and running.
return isUp0(name, index);
|
| private static native boolean | isUp0(java.lang.String name, int ind)
|
| public boolean | isVirtual()Returns whether this interface is a virtual interface (also called
subinterface).
Virtual interfaces are, on some systems, interfaces created as a child
of a physical interface and given different settings (like address or
MTU). Usually the name of the interface will the name of the parent
followed by a colon (:) and a number identifying the child since there
can be several virtual interfaces attached to a single physical
interface.
return virtual;
|
| public boolean | supportsMulticast()Returns whether a network interface supports multicasting or not.
return supportsMulticast0(name, index);
|
| private static native boolean | supportsMulticast0(java.lang.String name, int ind)
|
| public java.lang.String | toString()
String result = "name:";
result += name == null? "null": name;
if (displayName != null) {
result += " (" + displayName + ")";
}
result += " index: "+index+" addresses:\n";
for (Enumeration e = getInetAddresses(); e.hasMoreElements(); ) {
InetAddress addr = (InetAddress)e.nextElement();
result += addr+";\n";
}
return result;
|
