JAVA判断 ipv6 的ip地址,网关和前缀合法性的函数
时间: 2024-03-26 15:40:12 浏览: 15
下面是Java中判断IPv6地址、网关和前缀合法性的示例函数:
```java
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.UnknownHostException;
public class IPv6Validation {
public static boolean isIPv6AddressValid(String address) {
try {
InetAddress inetAddress = InetAddress.getByName(address);
if (inetAddress instanceof Inet6Address) {
return true;
}
} catch (UnknownHostException e) {
// IP地址无效
}
return false;
}
public static boolean isIPv6GatewayValid(String gateway, String prefix) {
try {
InetAddress gatewayAddress = InetAddress.getByName(gateway);
InetAddress prefixAddress = InetAddress.getByName(prefix);
if (gatewayAddress instanceof Inet6Address && prefixAddress instanceof Inet6Address) {
byte[] gatewayBytes = gatewayAddress.getAddress();
byte[] prefixBytes = prefixAddress.getAddress();
int prefixLength = prefixBytes.length * 8;
// 检查网关地址是否在网络前缀范围内
for (int i = 0; i < prefixBytes.length; i++) {
if (prefixBytes[i] != gatewayBytes[i]) {
int bitsToCompare = Math.min(8, prefixLength - (i * 8));
int mask = (0xFF << (8 - bitsToCompare)) & 0xFF;
if ((prefixBytes[i] & mask) != (gatewayBytes[i] & mask)) {
return false;
}
}
}
return true;
}
} catch (UnknownHostException e) {
// IP地址无效
}
return false;
}
public static boolean isIPv6PrefixValid(String prefix) {
try {
InetAddress inetAddress = InetAddress.getByName(prefix);
if (inetAddress instanceof Inet6Address) {
return true;
}
} catch (UnknownHostException e) {
// IP地址无效
}
return false;
}
}
```
注意,以上示例函数的实现仅供参考,实际应用中应该根据具体需求进行适当调整和扩展。