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NetUtil.bigIntegerToIPv6增加长度修正

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This commit is contained in:
Looly 2024-11-05 18:15:37 +08:00
parent 4224e86461
commit 735f531e3c
3 changed files with 35 additions and 3 deletions
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1
CHANGELOG.md
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@ -20,6 +20,7 @@
* 【core 】 优化NumberUtil.count（pr#3772@Github）
* 【crypto 】 SM2.signHex改名为signHexFromHex，原名标记废弃，避免歧义（issue#IB0NVY@Gitee）
* 【all 】 优化所调用的ObjectUtil#defaultIfNull避免重复创建（pr#1274@Gitee）
* 【core 】 NetUtil.bigIntegerToIPv6增加长度修正（issue#IB27HV@Gitee）
### 🐞Bug修复
* 【json 】 修复JSONConfig.setDateFormat设置后toBean无效问题（issue#3713@Github）

25
hutool-core/src/main/java/cn/hutool/core/net/NetUtil.java
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@ -108,9 +108,30 @@ public class NetUtil {
* @since 5.5.7
*/
public static String bigIntegerToIPv6(BigInteger bigInteger) {
// 确保 BigInteger 在 IPv6 地址范围内
if (bigInteger.compareTo(BigInteger.ZERO) < 0 || bigInteger.compareTo(new BigInteger("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 16)) > 0) {
throw new IllegalArgumentException("BigInteger value is out of IPv6 range");
}
// 将 BigInteger 转换为 16 字节的字节数组
byte[] bytes = bigInteger.toByteArray();
if (bytes.length > 16) {
// 如果字节数组长度大于 16，去掉前导零
int offset = bytes[0] == 0 ? 1 : 0;
final byte[] newBytes = new byte[16];
System.arraycopy(bytes, offset, newBytes, 0, 16);
bytes = newBytes;
} else if (bytes.length < 16) {
// 如果字节数组长度小于 16，前面补零
byte[] paddedBytes = new byte[16];
System.arraycopy(bytes, 0, paddedBytes, 16 - bytes.length, bytes.length);
bytes = paddedBytes;
}
// 将字节数组转换为 IPv6 地址字符串
try {
return InetAddress.getByAddress(bigInteger.toByteArray()).toString().substring(1);
} catch (UnknownHostException ignore) {
return Inet6Address.getByAddress(bytes).getHostAddress();
} catch (UnknownHostException e) {
return null;
}
}

12
hutool-core/src/test/java/cn/hutool/core/net/NetUtilTest.java
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@ -3,15 +3,18 @@ package cn.hutool.core.net;
import cn.hutool.core.lang.Console;
import cn.hutool.core.lang.PatternPool;
import cn.hutool.core.util.ReUtil;
import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
import java.math.BigInteger;
import java.net.HttpCookie;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.util.List;
import static org.junit.jupiter.api.Assertions.*;
/**
* NetUtil单元测试
*
@ -126,4 +129,11 @@ public class NetUtilTest {
final String ip = NetUtil.getMultistageReverseProxyIp(ips);
assertEquals("12.34.56.78", ip);
}
@Test
void bigIntegerToIPv6Test() {
BigInteger bigInteger = new BigInteger("21987654321098765432109876543210", 10);
String ipv6Address = NetUtil.bigIntegerToIPv6(bigInteger);
Assertions.assertEquals("0:115:85f1:5eb3:c74d:a870:11c6:7eea", ipv6Address);
}
}