Missing SSL_CTX_clear_mode and SSL_CTX_get_mode functions.

[janis-ab]

In OpenSSL docs there are described SSL_CTX_clear_mode and SSL_CTX_get_mode functions.

It seems that library rust-openssl does not expose those functions. Is it possible to create bindings for them or other/newer functions should be used instead?

I see that https://docs.rs/openssl-sys/0.9.104/src/openssl_sys/ssl.rs.html#245-247 even SSL_CTX_set_mode does not use underlying OpenSSL's provided SSL_CTX_set_mode.

pub unsafe fn SSL_CTX_set_mode(ctx: *mut SSL_CTX, op: c_long) -> c_long {
    SSL_CTX_ctrl(ctx, SSL_CTRL_MODE, op, ptr::null_mut())
}

It SSL_CTX_ctrl docs there is comment:

These functions should never be called directly.

[janis-ab]

And it is not possible to clear_mode with SSL_CTX_ctrl, because SSL_CTRL_CLEAR_MODE is not available as well.

[botovq]

It seems that library rust-openssl does not expose those functions

Those are not functions. Those are C preprocessor macros which are even more type unsafe than C generally is. These do what the rust-openssl reimplementation does:

# define SSL_CTX_set_mode(ctx,op) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_MODE,(op),NULL)

Since Rust ffi ignores the C preprocessor you can't use the macros provided in ssl.h from Rust.

These functions should never be called directly.

The reason the OpenSSL docs say this is that you should be using the macro wrappers... which rust-openssl can't.

And it is not possible to clear_mode with SSL_CTX_ctrl, because SSL_CTRL_CLEAR_MODE is not available as well.

Well, that could be fixed.