ngx::ffi

Function SSL_set_msg_callback

Source 
pub unsafe extern "C" fn SSL_set_msg_callback(
    ssl: *mut ssl_st,
    cb: Option<unsafe extern "C" fn(_: i32, _: i32, _: i32, _: *const c_void, _: usize, _: *mut ssl_st, _: *mut c_void)>,
)