下面列出了java.net.Inet6Address#isIPv4CompatibleAddress ( ) 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。
private IntObjectMap<DnsQueryContext> getOrCreateContextMap(InetSocketAddress nameServerAddr) {
synchronized (map) {
final IntObjectMap<DnsQueryContext> contexts = map.get(nameServerAddr);
if (contexts != null) {
return contexts;
}
final IntObjectMap<DnsQueryContext> newContexts = new IntObjectHashMap<DnsQueryContext>();
final InetAddress a = nameServerAddr.getAddress();
final int port = nameServerAddr.getPort();
map.put(nameServerAddr, newContexts);
if (a instanceof Inet4Address) {
// Also add the mapping for the IPv4-compatible IPv6 address.
final Inet4Address a4 = (Inet4Address) a;
if (a4.isLoopbackAddress()) {
map.put(new InetSocketAddress(NetUtil.LOCALHOST6, port), newContexts);
} else {
map.put(new InetSocketAddress(toCompactAddress(a4), port), newContexts);
}
} else if (a instanceof Inet6Address) {
// Also add the mapping for the IPv4 address if this IPv6 address is compatible.
final Inet6Address a6 = (Inet6Address) a;
if (a6.isLoopbackAddress()) {
map.put(new InetSocketAddress(NetUtil.LOCALHOST4, port), newContexts);
} else if (a6.isIPv4CompatibleAddress()) {
map.put(new InetSocketAddress(toIPv4Address(a6), port), newContexts);
}
}
return newContexts;
}
}
/**
* Evaluates whether the argument is an IPv6 "compat" address.
*
* <p>An "IPv4 compatible", or "compat", address is one with 96 leading bits of zero, with the
* remaining 32 bits interpreted as an IPv4 address. These are conventionally represented in
* string literals as {@code "::192.168.0.1"}, though {@code "::c0a8:1"} is also considered an
* IPv4 compatible address (and equivalent to {@code "::192.168.0.1"}).
*
* <p>For more on IPv4 compatible addresses see section 2.5.5.1 of
* <a target="_parent" href="http://tools.ietf.org/html/rfc4291#section-2.5.5.1">RFC 4291</a>.
*
* <p>NOTE: This method is different from {@link Inet6Address#isIPv4CompatibleAddress} in that it
* more correctly classifies {@code "::"} and {@code "::1"} as proper IPv6 addresses (which they
* are), NOT IPv4 compatible addresses (which they are generally NOT considered to be).
*
* @param ip {@link Inet6Address} to be examined for embedded IPv4 compatible address format
* @return {@code true} if the argument is a valid "compat" address
*/
public static boolean isCompatIPv4Address(Inet6Address ip) {
if (!ip.isIPv4CompatibleAddress()) {
return false;
}
byte[] bytes = ip.getAddress();
if ((bytes[12] == 0)
&& (bytes[13] == 0)
&& (bytes[14] == 0)
&& ((bytes[15] == 0) || (bytes[15] == 1))) {
return false;
}
return true;
}
/**
* Evaluates whether the argument is an IPv6 "compat" address.
*
* <p>An "IPv4 compatible", or "compat", address is one with 96 leading bits of zero, with the
* remaining 32 bits interpreted as an IPv4 address. These are conventionally represented in
* string literals as {@code "::192.168.0.1"}, though {@code "::c0a8:1"} is also considered an
* IPv4 compatible address (and equivalent to {@code "::192.168.0.1"}).
*
* <p>For more on IPv4 compatible addresses see section 2.5.5.1 of
* <a target="_parent" href="http://tools.ietf.org/html/rfc4291#section-2.5.5.1">RFC 4291</a>.
*
* <p>NOTE: This method is different from {@link Inet6Address#isIPv4CompatibleAddress} in that it
* more correctly classifies {@code "::"} and {@code "::1"} as proper IPv6 addresses (which they
* are), NOT IPv4 compatible addresses (which they are generally NOT considered to be).
*
* @param ip {@link Inet6Address} to be examined for embedded IPv4 compatible address format
* @return {@code true} if the argument is a valid "compat" address
*/
public static boolean isCompatIPv4Address(Inet6Address ip) {
if (!ip.isIPv4CompatibleAddress()) {
return false;
}
byte[] bytes = ip.getAddress();
if ((bytes[12] == 0) && (bytes[13] == 0) && (bytes[14] == 0)
&& ((bytes[15] == 0) || (bytes[15] == 1))) {
return false;
}
return true;
}
/**
* Evaluates whether the argument is an IPv6 "compat" address.
*
* <p>An "IPv4 compatible", or "compat", address is one with 96 leading bits of zero, with the
* remaining 32 bits interpreted as an IPv4 address. These are conventionally represented in
* string literals as {@code "::192.168.0.1"}, though {@code "::c0a8:1"} is also considered an
* IPv4 compatible address (and equivalent to {@code "::192.168.0.1"}).
*
* <p>For more on IPv4 compatible addresses see section 2.5.5.1 of
* <a target="_parent" href="http://tools.ietf.org/html/rfc4291#section-2.5.5.1">RFC 4291</a>.
*
* <p>NOTE: This method is different from {@link Inet6Address#isIPv4CompatibleAddress} in that it
* more correctly classifies {@code "::"} and {@code "::1"} as proper IPv6 addresses (which they
* are), NOT IPv4 compatible addresses (which they are generally NOT considered to be).
*
* @param ip {@link Inet6Address} to be examined for embedded IPv4 compatible address format
* @return {@code true} if the argument is a valid "compat" address
*/
public static boolean isCompatIPv4Address(Inet6Address ip) {
if (!ip.isIPv4CompatibleAddress()) {
return false;
}
byte[] bytes = ip.getAddress();
if ((bytes[12] == 0) && (bytes[13] == 0) && (bytes[14] == 0)
&& ((bytes[15] == 0) || (bytes[15] == 1))) {
return false;
}
return true;
}
/**
* Evaluates whether the argument is an IPv6 "compat" address.
*
* <p>An "IPv4 compatible", or "compat", address is one with 96 leading bits of zero, with the
* remaining 32 bits interpreted as an IPv4 address. These are conventionally represented in
* string literals as {@code "::192.168.0.1"}, though {@code "::c0a8:1"} is also considered an
* IPv4 compatible address (and equivalent to {@code "::192.168.0.1"}).
*
* <p>For more on IPv4 compatible addresses see section 2.5.5.1 of
* <a target="_parent" href="http://tools.ietf.org/html/rfc4291#section-2.5.5.1">RFC 4291</a>.
*
* <p>NOTE: This method is different from {@link Inet6Address#isIPv4CompatibleAddress} in that it
* more correctly classifies {@code "::"} and {@code "::1"} as proper IPv6 addresses (which they
* are), NOT IPv4 compatible addresses (which they are generally NOT considered to be).
*
* @param ip {@link Inet6Address} to be examined for embedded IPv4 compatible address format
* @return {@code true} if the argument is a valid "compat" address
*/
public static boolean isCompatIPv4Address(Inet6Address ip) {
if (!ip.isIPv4CompatibleAddress()) {
return false;
}
byte[] bytes = ip.getAddress();
if ((bytes[12] == 0) && (bytes[13] == 0) && (bytes[14] == 0)
&& ((bytes[15] == 0) || (bytes[15] == 1))) {
return false;
}
return true;
}
/**
* Evaluates whether the argument is an IPv6 "compat" address.
*
* <p>An "IPv4 compatible", or "compat", address is one with 96 leading bits of zero, with the
* remaining 32 bits interpreted as an IPv4 address. These are conventionally represented in
* string literals as {@code "::192.168.0.1"}, though {@code "::c0a8:1"} is also considered an
* IPv4 compatible address (and equivalent to {@code "::192.168.0.1"}).
*
* <p>For more on IPv4 compatible addresses see section 2.5.5.1 of
* <a target="_parent" href="http://tools.ietf.org/html/rfc4291#section-2.5.5.1">RFC 4291</a>.
*
* <p>NOTE: This method is different from {@link Inet6Address#isIPv4CompatibleAddress} in that it
* more correctly classifies {@code "::"} and {@code "::1"} as proper IPv6 addresses (which they
* are), NOT IPv4 compatible addresses (which they are generally NOT considered to be).
*
* @param ip {@link Inet6Address} to be examined for embedded IPv4 compatible address format
* @return {@code true} if the argument is a valid "compat" address
*/
public static boolean isCompatIPv4Address(Inet6Address ip) {
if (!ip.isIPv4CompatibleAddress()) {
return false;
}
byte[] bytes = ip.getAddress();
if ((bytes[12] == 0) && (bytes[13] == 0) && (bytes[14] == 0)
&& ((bytes[15] == 0) || (bytes[15] == 1))) {
return false;
}
return true;
}
/**
* Evaluates whether the argument is an IPv6 "compat" address.
*
* <p>An "IPv4 compatible", or "compat", address is one with 96 leading
* bits of zero, with the remaining 32 bits interpreted as an
* IPv4 address. These are conventionally represented in string
* literals as {@code "::192.168.0.1"}, though {@code "::c0a8:1"} is
* also considered an IPv4 compatible address (and equivalent to
* {@code "::192.168.0.1"}).
*
* <p>For more on IPv4 compatible addresses see section 2.5.5.1 of
* <a target="_parent"
* href="http://tools.ietf.org/html/rfc4291#section-2.5.5.1"
* >http://tools.ietf.org/html/rfc4291</a>
*
* <p>NOTE: This method is different from
* {@link Inet6Address#isIPv4CompatibleAddress} in that it more
* correctly classifies {@code "::"} and {@code "::1"} as
* proper IPv6 addresses (which they are), NOT IPv4 compatible
* addresses (which they are generally NOT considered to be).
*
* @param ip {@link Inet6Address} to be examined for embedded IPv4 compatible address format
* @return {@code true} if the argument is a valid "compat" address
*/
public static boolean isCompatIPv4Address(Inet6Address ip) {
if (!ip.isIPv4CompatibleAddress()) {
return false;
}
byte[] bytes = ip.getAddress();
if ((bytes[12] == 0) && (bytes[13] == 0) && (bytes[14] == 0)
&& ((bytes[15] == 0) || (bytes[15] == 1))) {
return false;
}
return true;
}