支持的 getaddrinfo 标志

¥Supported getaddrinfo flags

版本历史
版本变更
v13.13.0, v12.17.0

添加了对 dns.ALL 标志的支持。

以下标志可以作为提示传给 dns.lookup()。

¥The following flags can be passed as hints to dns.lookup().

  • dns.ADDRCONFIG：将返回的地址类型限制为系统上配置的非环回地址类型。例如，仅当当前系统至少配置了一个 IPv4 地址时，才会返回 IPv4 地址。

    ¥dns.ADDRCONFIG: Limits returned address types to the types of non-loopback addresses configured on the system. For example, IPv4 addresses are only returned if the current system has at least one IPv4 address configured.

  • dns.V4MAPPED：如果指定了 IPv6 族，但未找到 IPv6 地址，则返回 IPv4 映射的 IPv6 地址。某些操作系统（例如 FreeBSD 10.1）不支持它。

    ¥dns.V4MAPPED: If the IPv6 family was specified, but no IPv6 addresses were found, then return IPv4 mapped IPv6 addresses. It is not supported on some operating systems (e.g. FreeBSD 10.1).

  • dns.ALL：如果指定了 dns.V4MAPPED，则返回解析的 IPv6 地址以及 IPv4 映射的 IPv6 地址。

    ¥dns.ALL: If dns.V4MAPPED is specified, return resolved IPv6 addresses as well as IPv4 mapped IPv6 addresses.