android - GaiException 和 EAI 的 "Gai"代表什么意思？

Question

没有javadoc。谁能帮忙解释一下 GaiException 的“Gai”到底是什么意思？以及“EAI”？

https://android.googlesource.com/platform/libcore/+/cff1616012dc0d56c2da9af2b9b1183e76c7e044/luni/src/main/java/libcore/io/GaiException.java

https://android.googlesource.com/platform/external/okhttp/+/abe10a6415358d66bb0d1ac3145c8909a327a54d/src/main/java/libcore/io/OsConstants.java

Answer 1

GaiException.java 的第 22-27 行文件状态如下:

/** An unchecked exception thrown when the {@link Os} {@code getaddrinfo} or {@code getnameinfo} * methods fail. This exception contains the native error value, for comparison against the * {@code GAI_} constants in {@link OsConstants}, should sophisticated * callers need to adjust their behavior based on the exact failure. */

根据@code getaddrinfo的措辞，它看起来像是获取地址信息的意思。

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操作系统界面

getaddrinfo 方法在 Os.java 中定义第 50 行的接口(interface)文件:

public InetAddress[] getaddrinfo(String node, StructAddrinfo hints) throws GaiException;

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操作系统接口(interface)实现

然后在ForwardingOs.java 中实现了getaddrinfo 方法(通过Os 接口(interface))第 59 行:

public InetAddress[] getaddrinfo(String node, StructAddrinfo hints) throws GaiException {
    return os.getaddrinfo(node, hints);
}

来自 ForwardingOs.java 的功能然后由 BlockGuardOs.java 继承类(并且没有被覆盖)