下面列出了java.net.InterfaceAddress#getNetworkPrefixLength ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
public static void main(String[] args) throws Exception {
Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
while (nics.hasMoreElements()) {
NetworkInterface nic = nics.nextElement();
for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
boolean valid = checkPrefix(iaddr);
if (!valid) {
passed = false;
debug(nic.getName(), iaddr);
}
InetAddress ia = iaddr.getAddress();
if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
// assumption: prefix length will always be 8
if (iaddr.getNetworkPrefixLength() != 8) {
out.println("Expected prefix of 8, got " + iaddr);
passed = false;
}
}
}
}
if (!passed)
throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
}
public static void main(String[] args) throws Exception {
Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
while (nics.hasMoreElements()) {
NetworkInterface nic = nics.nextElement();
for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
boolean valid = checkPrefix(iaddr);
if (!valid) {
passed = false;
debug(nic.getName(), iaddr);
}
InetAddress ia = iaddr.getAddress();
if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
// assumption: prefix length will always be 8
if (iaddr.getNetworkPrefixLength() != 8) {
out.println("Expected prefix of 8, got " + iaddr);
passed = false;
}
}
}
}
if (!passed)
throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
}
/**
* @deprecated This method is no longer used by LittleProxy and may be removed in a future release.
*/
@Deprecated
public static InetAddress firstLocalNonLoopbackIpv4Address() {
try {
Enumeration<NetworkInterface> networkInterfaces = NetworkInterface
.getNetworkInterfaces();
while (networkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = networkInterfaces
.nextElement();
if (networkInterface.isUp()) {
for (InterfaceAddress ifAddress : networkInterface
.getInterfaceAddresses()) {
if (ifAddress.getNetworkPrefixLength() > 0
&& ifAddress.getNetworkPrefixLength() <= 32
&& !ifAddress.getAddress().isLoopbackAddress()) {
return ifAddress.getAddress();
}
}
}
}
return null;
} catch (SocketException se) {
return null;
}
}
public static void main(String[] args) throws Exception {
Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
while (nics.hasMoreElements()) {
NetworkInterface nic = nics.nextElement();
for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
boolean valid = checkPrefix(iaddr);
if (!valid) {
passed = false;
debug(nic.getName(), iaddr);
}
InetAddress ia = iaddr.getAddress();
if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
// assumption: prefix length will always be 8
if (iaddr.getNetworkPrefixLength() != 8) {
out.println("Expected prefix of 8, got " + iaddr);
passed = false;
}
}
}
}
if (!passed)
throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
}
public static void main(String[] args) throws Exception {
Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
while (nics.hasMoreElements()) {
NetworkInterface nic = nics.nextElement();
for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
boolean valid = checkPrefix(iaddr);
if (!valid) {
passed = false;
debug(nic.getName(), iaddr);
}
InetAddress ia = iaddr.getAddress();
if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
// assumption: prefix length will always be 8
if (iaddr.getNetworkPrefixLength() != 8) {
out.println("Expected prefix of 8, got " + iaddr);
passed = false;
}
}
}
}
if (!passed)
throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
}
public static void main(String[] args) throws Exception {
Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
while (nics.hasMoreElements()) {
NetworkInterface nic = nics.nextElement();
for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
boolean valid = checkPrefix(iaddr);
if (!valid) {
passed = false;
debug(nic.getName(), iaddr);
}
InetAddress ia = iaddr.getAddress();
if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
// assumption: prefix length will always be 8
if (iaddr.getNetworkPrefixLength() != 8) {
out.println("Expected prefix of 8, got " + iaddr);
passed = false;
}
}
}
}
if (!passed)
throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
}
public static String getMask(String intf){
try {
NetworkInterface ntwrk = NetworkInterface.getByName(intf);
Iterator<InterfaceAddress> addrList = ntwrk.getInterfaceAddresses().iterator();
while (addrList.hasNext()) {
InterfaceAddress addr = addrList.next();
InetAddress ip = addr.getAddress();
if (ip instanceof Inet4Address) {
String mask = ip.getHostAddress() + "/" +
addr.getNetworkPrefixLength();
return mask;
}
}
} catch (SocketException e) {
e.printStackTrace();
}
return null;
}
public static void main(String[] args) throws Exception {
Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
while (nics.hasMoreElements()) {
NetworkInterface nic = nics.nextElement();
for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
boolean valid = checkPrefix(iaddr);
if (!valid) {
passed = false;
debug(nic.getName(), iaddr);
}
InetAddress ia = iaddr.getAddress();
if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
// assumption: prefix length will always be 8
if (iaddr.getNetworkPrefixLength() != 8) {
out.println("Expected prefix of 8, got " + iaddr);
passed = false;
}
}
}
}
if (!passed)
throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
}
public static void main(String[] args) throws Exception {
Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
while (nics.hasMoreElements()) {
NetworkInterface nic = nics.nextElement();
for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
boolean valid = checkPrefix(iaddr);
if (!valid) {
passed = false;
debug(nic.getName(), iaddr);
}
InetAddress ia = iaddr.getAddress();
if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
// assumption: prefix length will always be 8
if (iaddr.getNetworkPrefixLength() != 8) {
out.println("Expected prefix of 8, got " + iaddr);
passed = false;
}
}
}
}
if (!passed)
throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
}
public static void main(String[] args) throws Exception {
Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
while (nics.hasMoreElements()) {
NetworkInterface nic = nics.nextElement();
for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
boolean valid = checkPrefix(iaddr);
if (!valid) {
passed = false;
debug(nic.getName(), iaddr);
}
InetAddress ia = iaddr.getAddress();
if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
// assumption: prefix length will always be 8
if (iaddr.getNetworkPrefixLength() != 8) {
out.println("Expected prefix of 8, got " + iaddr);
passed = false;
}
}
}
}
if (!passed)
throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
}
public static String[] getLocalCidrs() {
final String defaultHostIp = getDefaultHostIp();
final List<String> cidrList = new ArrayList<>();
try {
for (final NetworkInterface ifc : IteratorUtil.enumerationAsIterable(NetworkInterface.getNetworkInterfaces())) {
if (ifc.isUp() && !ifc.isVirtual() && !ifc.isLoopback()) {
for (final InterfaceAddress address : ifc.getInterfaceAddresses()) {
final InetAddress addr = address.getAddress();
final int prefixLength = address.getNetworkPrefixLength();
if (prefixLength < MAX_CIDR && prefixLength > 0) {
final String ip = addr.getHostAddress();
if (ip.equalsIgnoreCase(defaultHostIp)) {
cidrList.add(ipAndNetMaskToCidr(ip, getCidrNetmask(prefixLength)));
}
}
}
}
}
} catch (final SocketException e) {
s_logger.warn("UnknownHostException in getLocalCidrs().", e);
}
return cidrList.toArray(new String[0]);
}
public static String[] getLocalCidrs() {
final String defaultHostIp = getDefaultHostIp();
final List<String> cidrList = new ArrayList<String>();
try {
for (final NetworkInterface ifc : IteratorUtil.enumerationAsIterable(NetworkInterface.getNetworkInterfaces())) {
if (ifc.isUp() && !ifc.isVirtual() && !ifc.isLoopback()) {
for (final InterfaceAddress address : ifc.getInterfaceAddresses()) {
final InetAddress addr = address.getAddress();
final int prefixLength = address.getNetworkPrefixLength();
if (prefixLength < MAX_CIDR && prefixLength > 0) {
final String ip = addr.getHostAddress();
if (ip.equalsIgnoreCase(defaultHostIp)) {
cidrList.add(ipAndNetMaskToCidr(ip, getCidrNetmask(prefixLength)));
}
}
}
}
}
} catch (final SocketException e) {
s_logger.warn("UnknownHostException in getLocalCidrs().", e);
}
return cidrList.toArray(new String[0]);
}
public static void main(String[] args) throws Exception {
Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
while (nics.hasMoreElements()) {
NetworkInterface nic = nics.nextElement();
for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
boolean valid = checkPrefix(iaddr);
if (!valid) {
passed = false;
debug(nic.getName(), iaddr);
}
InetAddress ia = iaddr.getAddress();
if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
// assumption: prefix length will always be 8
if (iaddr.getNetworkPrefixLength() != 8) {
out.println("Expected prefix of 8, got " + iaddr);
passed = false;
}
}
}
}
if (!passed)
throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
}
public static void main(String[] args) throws Exception {
Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
while (nics.hasMoreElements()) {
NetworkInterface nic = nics.nextElement();
for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
boolean valid = checkPrefix(iaddr);
if (!valid) {
passed = false;
debug(nic.getName(), iaddr);
}
InetAddress ia = iaddr.getAddress();
if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
// assumption: prefix length will always be 8
if (iaddr.getNetworkPrefixLength() != 8) {
out.println("Expected prefix of 8, got " + iaddr);
passed = false;
}
}
}
}
if (!passed)
throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
}
public static void main(String[] args) throws Exception {
Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
while (nics.hasMoreElements()) {
NetworkInterface nic = nics.nextElement();
for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
boolean valid = checkPrefix(iaddr);
if (!valid) {
passed = false;
debug(nic.getName(), iaddr);
}
InetAddress ia = iaddr.getAddress();
if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
// assumption: prefix length will always be 8
if (iaddr.getNetworkPrefixLength() != 8) {
out.println("Expected prefix of 8, got " + iaddr);
passed = false;
}
}
}
}
if (!passed)
throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
}
public Short getAddressNetworkPrefixLength(InetAddress inetAddress) {
synchronized (networkInterfaces) {
for (NetworkInterface iface : networkInterfaces) {
for (InterfaceAddress interfaceAddress : getInterfaceAddresses(iface)) {
if (interfaceAddress != null && interfaceAddress.getAddress().equals(inetAddress)) {
short prefix = interfaceAddress.getNetworkPrefixLength();
if(prefix > 0 && prefix < 32) return prefix; // some network cards return -1
return null;
}
}
}
}
return null;
}
/** format internet address: java's default doesn't include everything useful */
private static String formatAddress(InterfaceAddress interfaceAddress) throws IOException {
StringBuilder sb = new StringBuilder();
InetAddress address = interfaceAddress.getAddress();
if (address instanceof Inet6Address) {
sb.append("inet6 ");
sb.append(NetworkAddress.format(address));
sb.append(" prefixlen:");
sb.append(interfaceAddress.getNetworkPrefixLength());
} else {
sb.append("inet ");
sb.append(NetworkAddress.format(address));
int netmask = 0xFFFFFFFF << (32 - interfaceAddress.getNetworkPrefixLength());
sb.append(" netmask:").append(NetworkAddress.format(InetAddress.getByAddress(new byte[]{
(byte) (netmask >>> 24),
(byte) (netmask >>> 16 & 0xFF),
(byte) (netmask >>> 8 & 0xFF),
(byte) (netmask & 0xFF)
})));
InetAddress broadcast = interfaceAddress.getBroadcast();
if (broadcast != null) {
sb.append(" broadcast:").append(NetworkAddress.format(broadcast));
}
}
if (address.isLoopbackAddress()) {
sb.append(" scope:host");
} else if (address.isLinkLocalAddress()) {
sb.append(" scope:link");
} else if (address.isSiteLocalAddress()) {
sb.append(" scope:site");
}
return sb.toString();
}
public Short getAddressNetworkPrefixLength(InetAddress inetAddress) {
synchronized (networkInterfaces) {
for (NetworkInterface iface : networkInterfaces) {
for (InterfaceAddress interfaceAddress : getInterfaceAddresses(iface)) {
if (interfaceAddress != null && interfaceAddress.getAddress().equals(inetAddress)) {
short prefix = interfaceAddress.getNetworkPrefixLength();
if(prefix > 0 && prefix < 32) return prefix; // some network cards return -1
return null;
}
}
}
}
return null;
}
/**
* Constructs a new {@code LinkAddress} from an {@code InterfaceAddress}.
* The flags are set to zero and the scope is determined from the address.
* @param interfaceAddress The interface address.
* @hide
*/
public LinkAddress(InterfaceAddress interfaceAddress) {
this(interfaceAddress.getAddress(),
interfaceAddress.getNetworkPrefixLength());
}
/**
* Constructs a host name from an InterfaceAddress.
*
* @param interfaceAddr
*/
public HostName(InterfaceAddress interfaceAddr) {
this(interfaceAddr.getAddress(), (int) interfaceAddr.getNetworkPrefixLength());
}