/**
* A list of the non-loopback, non-link-local IP addresses of the host, or null if none found.
*
* @return The non-loopback, non-link-local IP addresses on the host.
*/
public static List<InetAddress> hostAddresses() {
List<InetAddress> addrList = new ArrayList<>();
Enumeration<NetworkInterface> IFCs = null;
try {
IFCs = NetworkInterface.getNetworkInterfaces();
} catch (SocketException ex) {
log.error("Unable to get network interfaces.", ex);
}
if (IFCs != null) {
while (IFCs.hasMoreElements()) {
NetworkInterface IFC = IFCs.nextElement();
try {
if (IFC.isUp()) {
Enumeration<InetAddress> addresses = IFC.getInetAddresses();
while (addresses.hasMoreElements()) {
InetAddress address = addresses.nextElement();
if (!address.isLoopbackAddress() && !address.isLinkLocalAddress()) {
addrList.add(address);
}
}
}
} catch (SocketException ex) {
log.error("Unable to read network interface {}.", IFC.toString(), ex);
}
}
}
return addrList;
}
public static boolean isPlatformHost(String host) {
Object[] domains = getPlatformHosts().toArray();
host = host.toLowerCase();
for (int i = 0; i < domains.length; i++) {
String domain = (String) domains[i];
if (domain.equals(host)) {
return (true);
}
if (host.endsWith("." + domain)) {
return (true);
}
}
if (Constants.isCVSVersion()) {
// allow local addresses for testing
try {
InetAddress ia = InetAddress.getByName(host);
return (ia.isLoopbackAddress() || ia.isLinkLocalAddress() || ia.isSiteLocalAddress());
} catch (Throwable e) {
}
}
return (false);
}
public static Set<String> getIpAddresses() {
if (_ipAddresses == null) {
_ipAddresses = new HashSet<String>();
try {
List<NetworkInterface> networkInterfaces =
Collections.list(NetworkInterface.getNetworkInterfaces());
for (NetworkInterface networkInterface : networkInterfaces) {
List<InetAddress> inetAddresses = Collections.list(networkInterface.getInetAddresses());
for (InetAddress inetAddress : inetAddresses) {
if (inetAddress.isLinkLocalAddress()
|| inetAddress.isLoopbackAddress()
|| !(inetAddress instanceof Inet4Address)) {
continue;
}
_ipAddresses.add(inetAddress.getHostAddress());
}
}
} catch (Exception e) {
_log.error("Unable to read local server's IP addresses");
_log.error(e, e);
}
}
return new HashSet<String>(_ipAddresses);
}
public static String[] getNetworkParams(NetworkInterface nic) {
List<InterfaceAddress> addrs = nic.getInterfaceAddresses();
if (addrs == null || addrs.size() == 0) {
return null;
}
InterfaceAddress addr = null;
for (InterfaceAddress iaddr : addrs) {
InetAddress inet = iaddr.getAddress();
if (!inet.isLinkLocalAddress()
&& !inet.isLoopbackAddress()
&& !inet.isMulticastAddress()
&& inet.getAddress().length == 4) {
addr = iaddr;
break;
}
}
if (addr == null) {
return null;
}
String[] result = new String[3];
result[0] = addr.getAddress().getHostAddress();
try {
byte[] mac = nic.getHardwareAddress();
result[1] = byte2Mac(mac);
} catch (Exception e) {
}
result[2] = prefix2Netmask(addr.getNetworkPrefixLength());
return result;
}
public static String getLocalIpAddress() {
String IP = null;
StringBuilder IPStringBuilder = new StringBuilder();
try {
Enumeration<NetworkInterface> networkInterfaceEnumeration =
NetworkInterface.getNetworkInterfaces();
while (networkInterfaceEnumeration.hasMoreElements()) {
NetworkInterface networkInterface = networkInterfaceEnumeration.nextElement();
Enumeration<InetAddress> inetAddressEnumeration = networkInterface.getInetAddresses();
while (inetAddressEnumeration.hasMoreElements()) {
InetAddress inetAddress = inetAddressEnumeration.nextElement();
if (!inetAddress.isLoopbackAddress()
&& !inetAddress.isLinkLocalAddress()
&& inetAddress.isSiteLocalAddress()) {
IPStringBuilder.append(inetAddress.getHostAddress().toString() + "\n");
}
}
}
} catch (SocketException ex) {
}
IP = IPStringBuilder.toString();
return IP;
}
// on linux system
public void init2() {
try {
NetworkInterface networkInterface = NetworkInterface.getByName("eth0");
Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
while (inetAddresses.hasMoreElements()) {
InetAddress address = inetAddresses.nextElement();
if (!address.isLinkLocalAddress()) { // just get IPv4 address
localAddress = address;
}
}
// get broadcast address
List<InterfaceAddress> addresses = networkInterface.getInterfaceAddresses();
for (InterfaceAddress address : addresses) {
if (address.getBroadcast() != null) {
broadcastAddress = address.getBroadcast();
break;
}
}
if (broadcastAddress == null) {
System.out.println("get broadcast address error!");
}
System.out.println("local ip address is " + localAddress.getHostAddress());
System.out.println("broadcast address is " + broadcastAddress.getHostAddress());
socket = new DatagramSocket();
socket.setBroadcast(true);
} catch (SocketException se) {
se.printStackTrace();
}
}
private static void connectAndPlay(VideoComponent vc, String settings, String addr)
throws UnknownHostException, IOException {
// find this ip
updateResource();
Socket skt = null;
if (addr.length() > 0) {
Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces();
while (e.hasMoreElements()) {
NetworkInterface n = (NetworkInterface) e.nextElement();
Enumeration<InetAddress> ee = n.getInetAddresses();
while (ee.hasMoreElements()) {
InetAddress i = (InetAddress) ee.nextElement();
if (!i.isLinkLocalAddress() && !i.isLoopbackAddress()) {
pushLog("CLNT START IP:" + i.getHostAddress());
clientLoc = i.getHostAddress();
}
}
}
serverLoc = addr;
skt = new Socket(serverLoc, 45000);
} else if (addr.length() == 0) {
clientLoc = "127.0.0.1";
serverLoc = "127.0.0.1";
skt = new Socket("localhost", 45000);
}
skt.setReuseAddress(true);
BufferedReader in = new BufferedReader(new InputStreamReader(skt.getInputStream()));
out = new PrintWriter(skt.getOutputStream(), true);
JSONObject portNeg = new JSONObject(in.readLine());
int port = portNeg.getInt("port");
System.out.println("Client port: " + port);
JSONObject json_settings = new JSONObject();
json_settings.put("settings", attribute + " " + clientbw + " " + request);
out.println(json_settings.toString());
pushLog("> SYS: CNCT SUCCESS");
startStreaming(vc, settings, port);
pushLog("> CTRL: LISTENING FOR COMMANDS");
Scanner s = new Scanner(System.in);
String line;
JSONObject json_command;
while (true) {
line = s.nextLine();
json_command = new JSONObject();
json_command.put("command", line);
// json_command.put("bandwidth", "");
out.println(json_command.toString());
if (line.equals("stop")) break;
}
in.close();
out.close();
skt.close();
}
@Override
public NetworkState getState() {
java.net.InetAddress jnAddress = getFirstActiveInetAddress();
if (jnAddress == null) {
return NetworkState.DISCONNECTED;
} else if (jnAddress.isLoopbackAddress() || jnAddress.isLinkLocalAddress()) {
return NetworkState.CONNECTED_LOCAL;
} else if (jnAddress.isSiteLocalAddress()) {
return NetworkState.CONNECTED_SITE;
} else {
return NetworkState.CONNECTED_GLOBAL;
}
}
private synchronized void addLocalAddress(InetAddress addr) {
int addrtype;
if (addr.isLoopbackAddress()) {
addrtype = HOSTMAP_LOOPBACK;
} else if (addr.isLinkLocalAddress()) {
addrtype = HOSTMAP_LINKLOCAL;
} else if (addr.isSiteLocalAddress()) {
addrtype = HOSTMAP_SITELOCAL;
} else if (addr.isMulticastAddress()) {
addrtype = HOSTMAP_MULTICAST;
} else {
addrtype = HOSTMAP_GLOBAL;
}
if (addr.getAddress().length == 4) {
addrtype |= HOSTMAP_IPV4;
} else {
addrtype |= HOSTMAP_IPV6;
}
String addrAsString = addr.getHostAddress();
fLocalHostAddresses.put(addrAsString, Integer.valueOf(addrtype | HOSTMAP_ADDR));
if (0 == (addrtype & (HOSTMAP_LINKLOCAL | HOSTMAP_SITELOCAL | HOSTMAP_MULTICAST))) {
// Don't do DNS Reverse Loopkup's for non-routable addresses.
// They won't be known to the Name Server anyway, and they
// make startup _much_ slower.
String addrAsNameCan = addr.getCanonicalHostName().toLowerCase();
// query the name after the canonical name, it will re-use
// cached canonical name (if the name was not explicitly set)
String addrAsName = addr.getHostName().toLowerCase();
if (!addrAsNameCan.equals(addrAsString)) {
// We must check if we really got a name, since InetAddress.getHostName()
// returns the original address in case it thinks the name is spoofed!
if (0 == (addrtype & HOSTMAP_LOOPBACK)) {
// Not loopback --> found a Canonical Name.
fLocalHostAddresses.put(
addrAsNameCan, Integer.valueOf(addrtype | HOSTMAP_NAME | HOSTMAP_CANONICALNAME));
// override the address as canonical-address
fLocalHostAddresses.put(
addrAsString, Integer.valueOf(addrtype | HOSTMAP_ADDR | HOSTMAP_CANONICALADDR));
} else {
// Loopback --> add the found name as non-canonical.
fLocalHostAddresses.put(addrAsNameCan, Integer.valueOf(addrtype | HOSTMAP_NAME));
}
}
if (!addrAsName.equals(addrAsString) && !addrAsName.equals(addrAsNameCan)) {
// don't override the canonical name by the name.
fLocalHostAddresses.put(addrAsName, Integer.valueOf(addrtype | HOSTMAP_NAME));
}
}
}
private static InetAddress getLinkLocalAddress(String networkInterfaceName)
throws SocketException {
Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
for (NetworkInterface networkInterface : Collections.list(networkInterfaces)) {
if (networkInterfaceName == null || networkInterfaceName.equals(networkInterface.getName())) {
Enumeration<InetAddress> ips = networkInterface.getInetAddresses();
for (InetAddress ip : Collections.list(ips)) {
if (ip.isLinkLocalAddress()) {
return ip;
}
}
}
}
return null;
}
public static void main(String[] args) {
if (args.length == 0 || args == null) {
System.out.println("Didn't enter argument!, Please enter like this.");
System.out.println("ex. java IPCharateristics args[0] args[1] ...");
return;
}
try {
InetAddress address = InetAddress.getByName(args[0]);
if (address.isAnyLocalAddress()) {
System.out.println(address + " is a wildcard address.");
}
if (address.isLoopbackAddress()) {
System.out.println(address + " is a loopback address.");
}
if (address.isLinkLocalAddress()) {
System.out.println(address + " is a link-local address.");
}
if (address.isSiteLocalAddress()) {
System.out.println(address + " is a site-local address");
} else {
System.out.println(address + " is a global address");
}
if (address.isMulticastAddress()) {
if (address.isMCGlobal()) {
System.out.println(address + " is a global multicast address.");
} else if (address.isMCOrgLocal()) {
System.out.println(address + " is an organization wide multicast address.");
} else if (address.isMCSiteLocal()) {
System.out.println(address + " is a site wide multicast address.");
} else if (address.isMCLinkLocal()) {
System.out.println(address + " is a subnet wide multicast address.");
} else if (address.isMCNodeLocal()) {
System.out.println(address + " is an interface-local multicast address.");
} else {
System.out.println(address + " is an unknown multicast address type.");
}
} else {
System.out.println(address + " is a unicast address.");
}
} catch (UnknownHostException ex) {
System.out.println("Could not resolve " + args[0]);
}
}
/**
* Returns an InetAddress instance that represents the localhost, and that a socket can bind upon
* or distribute to peers as a contact address.
*
* @param intendedDestination the destination that we'd like to use the localhost address with.
* @return an InetAddress instance representing the local host, and that a socket can bind upon or
* distribute to peers as a contact address.
*/
public synchronized InetAddress getLocalHost(InetAddress intendedDestination) {
// no point in making sure that the localHostFinderSocket is initialized.
// better let it through a NullPointerException.
InetAddress localHost = null;
localHostFinderSocket.connect(intendedDestination, this.RANDOM_ADDR_DISC_PORT);
localHost = localHostFinderSocket.getLocalAddress();
localHostFinderSocket.disconnect();
// windows socket implementations return the any address so we need to
// find something else here ... InetAddress.getLocalHost seems to work
// better on windows so lets hope it'll do the trick.
if (localHost.isAnyLocalAddress()) {
try {
// all that's inside the if is an ugly IPv6 hack
// (good ol' IPv6 - always causing more problems than it solves.)
if (intendedDestination instanceof Inet6Address) {
// return the first globally routable ipv6 address we find
// on the machine (and hope it's a good one)
Enumeration interfaces = NetworkInterface.getNetworkInterfaces();
while (interfaces.hasMoreElements()) {
NetworkInterface iface = (NetworkInterface) interfaces.nextElement();
Enumeration addresses = iface.getInetAddresses();
while (addresses.hasMoreElements()) {
InetAddress address = (InetAddress) addresses.nextElement();
if (address instanceof Inet6Address) {
if (!address.isAnyLocalAddress()
&& !address.isLinkLocalAddress()
&& !address.isSiteLocalAddress()
&& !address.isLoopbackAddress()) {
return address;
}
}
}
}
} else localHost = InetAddress.getLocalHost();
/** @todo test on windows for ipv6 cases */
} catch (Exception ex) {
// sigh ... ok return 0.0.0.0
logger.warn("Failed to get localhost ", ex);
}
}
return localHost;
}
private Pair<String, Integer> validateUrl(String url) throws IllegalArgumentException {
try {
URI uri = new URI(url);
if (!uri.getScheme().equalsIgnoreCase("http") && !uri.getScheme().equalsIgnoreCase("https")) {
throw new IllegalArgumentException("Unsupported scheme for url");
}
int port = uri.getPort();
if (!(port == 80 || port == 443 || port == -1)) {
throw new IllegalArgumentException("Only ports 80 and 443 are allowed");
}
if (port == -1 && uri.getScheme().equalsIgnoreCase("https")) {
port = 443;
} else if (port == -1 && uri.getScheme().equalsIgnoreCase("http")) {
port = 80;
}
String host = uri.getHost();
try {
InetAddress hostAddr = InetAddress.getByName(host);
if (hostAddr.isAnyLocalAddress()
|| hostAddr.isLinkLocalAddress()
|| hostAddr.isLoopbackAddress()
|| hostAddr.isMulticastAddress()) {
throw new IllegalArgumentException("Illegal host specified in url");
}
if (hostAddr instanceof Inet6Address) {
throw new IllegalArgumentException(
"IPV6 addresses not supported (" + hostAddr.getHostAddress() + ")");
}
return new Pair<String, Integer>(host, port);
} catch (UnknownHostException uhe) {
throw new IllegalArgumentException("Unable to resolve " + host);
}
} catch (IllegalArgumentException iae) {
s_logger.warn("Failed uri validation check: " + iae.getMessage());
throw iae;
} catch (URISyntaxException use) {
s_logger.warn("Failed uri syntax check: " + use.getMessage());
throw new IllegalArgumentException(use.getMessage());
}
}
boolean shouldIgnorePacket(DatagramPacket packet) {
boolean result = false;
if (this.getInetAddress() != null) {
InetAddress from = packet.getAddress();
if (from != null) {
if (from.isLinkLocalAddress() && (!this.getInetAddress().isLinkLocalAddress())) {
// Ignore linklocal packets on regular interfaces, unless this is
// also a linklocal interface. This is to avoid duplicates. This is
// a terrible hack caused by the lack of an API to get the address
// of the interface on which the packet was received.
result = true;
}
if (from.isLoopbackAddress() && (!this.getInetAddress().isLoopbackAddress())) {
// Ignore loopback packets on a regular interface unless this is also a loopback
// interface.
result = true;
}
}
}
return result;
}
private static String getLocalPeerIP() throws SocketException {
String result = null;
Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces();
while (e.hasMoreElements()) {
NetworkInterface nic = (NetworkInterface) e.nextElement();
System.out.println("Net interface: " + nic.getName());
Enumeration<InetAddress> e2 = nic.getInetAddresses();
while (e2.hasMoreElements()) {
InetAddress ip = (InetAddress) e2.nextElement();
if (!ip.isLinkLocalAddress() && !ip.isLoopbackAddress()) {
return ip.getHostAddress();
}
}
}
System.out.println(result);
return null;
}
private static void init() {
// first way to get local IP
try {
localAddr = InetAddress.getLocalHost();
logger.info("local IP:" + localAddr.getHostAddress());
} catch (UnknownHostException e) {
logger.info("try again\n");
}
if (localAddr != null) {
return;
}
// other way to get local IP
Enumeration<InetAddress> localAddrs;
try {
// modify your network interface name
NetworkInterface ni = NetworkInterface.getByName(networkInterface);
if (ni == null) {
return;
}
localAddrs = ni.getInetAddresses();
if (localAddrs == null || !localAddrs.hasMoreElements()) {
logger.error("choose NetworkInterface\n" + getNetworkInterface());
return;
}
while (localAddrs.hasMoreElements()) {
InetAddress tmp = localAddrs.nextElement();
if (!tmp.isLoopbackAddress()
&& !tmp.isLinkLocalAddress()
&& !(tmp instanceof Inet6Address)) {
localAddr = tmp;
logger.info("local IP:" + localAddr.getHostAddress());
break;
}
}
} catch (Exception e) {
logger.error("Failure when init ProxyUtil", e);
logger.error("choose NetworkInterface\n" + getNetworkInterface());
}
}
public static List<String> getPublicIPs6() {
List<String> ips6 = new ArrayList<String>();
Enumeration<NetworkInterface> ifs;
try {
ifs = NetworkInterface.getNetworkInterfaces();
} catch (SocketException e) {
e.printStackTrace();
return ips6;
}
while (ifs.hasMoreElements()) {
NetworkInterface iface = ifs.nextElement();
Enumeration<InetAddress> iad = iface.getInetAddresses();
while (iad.hasMoreElements()) {
InetAddress localIP = iad.nextElement();
if (!localIP.isSiteLocalAddress()
&& !localIP.isLinkLocalAddress()
&& !localIP.isLoopbackAddress()) {
if (localIP instanceof java.net.Inet6Address) ips6.add(localIP.getHostAddress());
}
}
}
return ips6;
}
/**
* 获取ip地址
*
* @return
*/
public static String getLocalIpAddress() {
try {
for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();
en.hasMoreElements(); ) {
NetworkInterface intf = en.nextElement();
for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses();
enumIpAddr.hasMoreElements(); ) {
InetAddress inetAddress = enumIpAddr.nextElement();
if (!inetAddress.isLoopbackAddress() && !inetAddress.isLinkLocalAddress()) {
String ip_str = inetAddress.getHostAddress();
System.out.print("IpAddress=" + ip_str);
Log.i(TAG, "IpAddress=" + ip_str);
if (!TextUtils.isEmpty(ip_str)) {
return ip_str;
}
}
}
}
} catch (SocketException ex) {
Log.e(TAG, "WifiPreference IpAddress", ex);
}
return null;
}
private static boolean shouldInclude(
InetAddress ia,
boolean includeSiteLocal,
boolean includeLoopbackAndWildcard,
boolean includeIPv6) {
return (!ia.isLinkLocalAddress())
&& // 169.254.x.x
(!ia.isMulticastAddress())
&& (includeLoopbackAndWildcard || ((!ia.isAnyLocalAddress()) && (!ia.isLoopbackAddress())))
&& (includeSiteLocal
|| ((!ia.isSiteLocalAddress())
&&
// disallow fc00::/8 and fd00::/8 (Unique local addresses RFC 4193)
// not recognized as local by InetAddress
(ia.getAddress().length != 16 || (ia.getAddress()[0] & 0xfe) != 0xfc)))
&&
// Hamachi 5/8 allocated to RIPE (30 November 2010)
// Removed from TransportImpl.isPubliclyRoutable()
// Check moved to here, for now, but will eventually need to
// remove it from here also.
// (includeLocal ||
// (!ia.getHostAddress().startsWith("5."))) &&
(includeIPv6 || (ia instanceof Inet4Address));
}
private String validateUrl(String url) {
try {
URI uri = new URI(url);
if ((uri.getScheme() == null)
|| (!uri.getScheme().equalsIgnoreCase("http")
&& !uri.getScheme().equalsIgnoreCase("https")
&& !uri.getScheme().equalsIgnoreCase("file"))) {
throw new IllegalArgumentException("Unsupported scheme for url: " + url);
}
int port = uri.getPort();
if (!(port == 80 || port == 443 || port == -1)) {
throw new IllegalArgumentException("Only ports 80 and 443 are allowed");
}
String host = uri.getHost();
try {
InetAddress hostAddr = InetAddress.getByName(host);
if (hostAddr.isAnyLocalAddress()
|| hostAddr.isLinkLocalAddress()
|| hostAddr.isLoopbackAddress()
|| hostAddr.isMulticastAddress()) {
throw new IllegalArgumentException("Illegal host specified in url");
}
if (hostAddr instanceof Inet6Address) {
throw new IllegalArgumentException(
"IPV6 addresses not supported (" + hostAddr.getHostAddress() + ")");
}
} catch (UnknownHostException uhe) {
throw new IllegalArgumentException("Unable to resolve " + host);
}
return uri.toString();
} catch (URISyntaxException e) {
throw new IllegalArgumentException("Invalid URL " + url);
}
}
/**
* Gets a list of all network interfaces available on the local system or {@code null} if no
* interface is available.
*
* @return the list of {@code NetworkInterface} instances representing the available interfaces.
* @throws SocketException if an error occurs while getting the network interface information.
*/
public static Enumeration<NetworkInterface> getNetworkInterfaces() throws SocketException {
NetworkInterface[] interfaces = getNetworkInterfacesImpl();
if (interfaces == null) {
return null;
}
for (NetworkInterface netif : interfaces) {
// Ensure that current NetworkInterface is bound to at least
// one InetAddress before processing
if (netif.addresses != null) {
for (InetAddress addr : netif.addresses) {
if (16 == addr.ipaddress.length) {
if (addr.isLinkLocalAddress() || addr.isSiteLocalAddress()) {
((Inet6Address) addr).scopedIf = netif;
((Inet6Address) addr).ifname = netif.name;
((Inet6Address) addr).scope_ifname_set = true;
}
}
}
}
}
return (new Vector<NetworkInterface>(Arrays.asList(interfaces))).elements();
}
private static boolean acceptableAddress(InetAddress address) {
return address != null
&& !address.isLoopbackAddress()
&& !address.isAnyLocalAddress()
&& !address.isLinkLocalAddress();
}
private static Map<NetworkInterface, Set<InetAddress>> selectInterfaceAndAddress(
Map<NetworkInterface, Set<InetAddress>> acceptable) throws SocketException {
// Give preference to NetworkInterfaces that are 1) up, 2) not loopback 3) not point-to-point.
// If any of these criteria eliminate all interfaces, discard it.
if (acceptable.size() > 1) {
Map<NetworkInterface, Set<InetAddress>> preferred =
new HashMap<NetworkInterface, Set<InetAddress>>();
for (NetworkInterface ni : acceptable.keySet()) {
if (ni.isUp()) {
preferred.put(ni, acceptable.get(ni));
}
}
if (preferred.size() > 0) {
acceptable = preferred;
} // else this preference eliminates all interfaces, so ignore it
}
if (acceptable.size() > 1) {
Map<NetworkInterface, Set<InetAddress>> preferred =
new HashMap<NetworkInterface, Set<InetAddress>>();
for (NetworkInterface ni : acceptable.keySet()) {
if (!ni.isLoopback()) {
preferred.put(ni, acceptable.get(ni));
}
}
if (preferred.size() > 0) {
acceptable = preferred;
} // else this preference eliminates all interfaces, so ignore it
}
if (acceptable.size() > 1) {
Map<NetworkInterface, Set<InetAddress>> preferred =
new HashMap<NetworkInterface, Set<InetAddress>>();
for (NetworkInterface ni : acceptable.keySet()) {
if (!ni.isPointToPoint()) {
preferred.put(ni, acceptable.get(ni));
}
}
if (preferred.size() > 0) {
acceptable = preferred;
} // else this preference eliminates all interfaces, so ignore it
}
if (hasMultipleMatches(acceptable)) {
// Give preference to non-link-local addresses
Map<NetworkInterface, Set<InetAddress>> preferred =
new HashMap<NetworkInterface, Set<InetAddress>>();
for (Map.Entry<NetworkInterface, Set<InetAddress>> entry : acceptable.entrySet()) {
Set<InetAddress> acceptableAddresses = entry.getValue();
if (acceptableAddresses.size() > 1) {
Set<InetAddress> preferredAddresses = null;
for (InetAddress addr : acceptableAddresses) {
if (!addr.isLinkLocalAddress()) {
if (preferredAddresses == null) {
preferredAddresses = new HashSet<InetAddress>();
preferred.put(entry.getKey(), preferredAddresses);
}
preferredAddresses.add(addr);
}
}
} else {
acceptable.put(entry.getKey(), acceptableAddresses);
}
}
if (preferred.size() > 0) {
acceptable = preferred;
} // else this preference eliminates all interfaces, so ignore it
}
Map.Entry<NetworkInterface, Set<InetAddress>> entry = acceptable.entrySet().iterator().next();
return Collections.singletonMap(
entry.getKey(), Collections.singleton(entry.getValue().iterator().next()));
}
