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class method

Socket.tcp_fast_fallback

Socket.tcp_fast_fallback → true or false

VALUE socket_s_tcp_fast_fallback(VALUE self) {
    return rb_ivar_get(rb_cSocket, tcp_fast_fallback);
}

Returns whether Happy Eyeballs Version 2 (RFC 8305), which is provided starting from Ruby 3.4 when using TCPSocket.new and Socket.tcp, is enabled or disabled.

If true, it is enabled for TCPSocket.new and Socket.tcp. (Note: Happy Eyeballs Version 2 is not provided when using TCPSocket.new on Windows.)

If false, Happy Eyeballs Version 2 is disabled.

For details on Happy Eyeballs Version 2, see Socket.tcp_fast_fallback=.

See also .tcp_fast_fallback= .tcp .socketpair .tcp_server_loop also in 4.0 · 3.4

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