A new option of hop-by-hop option's expansion header is designed to store the source address authentication information.

设计逐跳选项扩展首部白勺新选项，用以存储源地址验证信息。

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This requires precompiled headers to be disabled for this source file, otherwise the compiler USES the precompiled header that includes the wrong macro expansion.

这需要预编译头文件对此源文件禁止，否则编译器使用预编译头文件会导致包含错误的宏扩展。

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