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Fix validation of 0/8 IPv4 addresses#580

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rschmitt merged 1 commit intoapache:masterfrom
rschmitt:ipv4addr
Dec 5, 2025
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Fix validation of 0/8 IPv4 addresses#580
rschmitt merged 1 commit intoapache:masterfrom
rschmitt:ipv4addr

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@rschmitt rschmitt commented Dec 2, 2025

0.0.0.0/8 IPv4 addresses are not illegal, just "reserved." This change brings InetAddressUtils in line with the JDK's InetAddress implementation, which accepts these addresses without issue, e.g.:

    InetAddress.getByAddress(new byte[]{ 0, 10, 25, 68 });
    InetAddress.getByName("0.10.25.68");

0.0.0.0/8 IPv4 addresses are not illegal, just "reserved." This change
brings `InetAddressUtils` in line with the JDK's `InetAddress`
implementation, which accepts these addresses without issue, e.g.:

```java
    InetAddress.getByAddress(new byte[]{ 0, 10, 25, 68 });
    InetAddress.getByName("0.10.25.68");
```
@rschmitt rschmitt merged commit cecaac5 into apache:master Dec 5, 2025
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@rschmitt rschmitt deleted the ipv4addr branch December 5, 2025 03:56
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2 participants