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use libc::{c_char, c_int, c_long, c_void, strlen};
use ffi::{BIO, BIO_METHOD, BIO_CTRL_FLUSH, BIO_TYPE_NONE, BIO_new};
use ffi_extras::{BIO_clear_retry_flags, BIO_set_retry_read, BIO_set_retry_write};
use std::any::Any;
use std::io;
use std::io::prelude::*;
use std::mem;
use std::ptr;
use std::slice;
use std::sync::Arc;
use ssl::error::SslError;
// "rust"
const NAME: [c_char; 5] = [114, 117, 115, 116, 0];
pub struct StreamState<S> {
pub stream: S,
pub error: Option<io::Error>,
pub panic: Option<Box<Any + Send>>,
}
pub fn new<S: Read + Write>(stream: S) -> Result<(*mut BIO, Arc<BIO_METHOD>), SslError> {
let method = Arc::new(BIO_METHOD {
type_: BIO_TYPE_NONE,
name: &NAME[0],
bwrite: Some(bwrite::<S>),
bread: Some(bread::<S>),
bputs: Some(bputs::<S>),
bgets: None,
ctrl: Some(ctrl::<S>),
create: Some(create),
destroy: Some(destroy::<S>),
callback_ctrl: None,
});
let state = Box::new(StreamState {
stream: stream,
error: None,
panic: None,
});
unsafe {
let bio = try_ssl_null!(BIO_new(&*method));
(*bio).ptr = Box::into_raw(state) as *mut _;
(*bio).init = 1;
return Ok((bio, method));
}
}
pub unsafe fn take_error<S>(bio: *mut BIO) -> Option<io::Error> {
let state = state::<S>(bio);
state.error.take()
}
#[cfg_attr(not(feature = "nightly"), allow(dead_code))]
pub unsafe fn take_panic<S>(bio: *mut BIO) -> Option<Box<Any + Send>> {
let state = state::<S>(bio);
state.panic.take()
}
pub unsafe fn get_ref<'a, S: 'a>(bio: *mut BIO) -> &'a S {
let state: &'a StreamState<S> = mem::transmute((*bio).ptr);
&state.stream
}
pub unsafe fn get_mut<'a, S: 'a>(bio: *mut BIO) -> &'a mut S {
&mut state(bio).stream
}
unsafe fn state<'a, S: 'a>(bio: *mut BIO) -> &'a mut StreamState<S> {
mem::transmute((*bio).ptr)
}
#[cfg(feature = "nightly")]
fn recover<F, T>(f: F) -> Result<T, Box<Any + Send>> where F: FnOnce() -> T + ::std::panic::RecoverSafe {
::std::panic::recover(f)
}
#[cfg(not(feature = "nightly"))]
fn recover<F, T>(f: F) -> Result<T, Box<Any + Send>> where F: FnOnce() -> T {
Ok(f())
}
#[cfg(feature = "nightly")]
use std::panic::AssertRecoverSafe;
#[cfg(not(feature = "nightly"))]
struct AssertRecoverSafe<T>(T);
#[cfg(not(feature = "nightly"))]
impl<T> AssertRecoverSafe<T> {
fn new(t: T) -> Self {
AssertRecoverSafe(t)
}
}
#[cfg(not(feature = "nightly"))]
impl<T> ::std::ops::Deref for AssertRecoverSafe<T> {
type Target = T;
fn deref(&self) -> &T {
&self.0
}
}
#[cfg(not(feature = "nightly"))]
impl<T> ::std::ops::DerefMut for AssertRecoverSafe<T> {
fn deref_mut(&mut self) -> &mut T {
&mut self.0
}
}
unsafe extern "C" fn bwrite<S: Write>(bio: *mut BIO, buf: *const c_char, len: c_int) -> c_int {
BIO_clear_retry_flags(bio);
let state = state::<S>(bio);
let buf = slice::from_raw_parts(buf as *const _, len as usize);
let result = {
let mut youre_not_my_supervisor = AssertRecoverSafe::new(&mut *state);
recover(move || youre_not_my_supervisor.stream.write(buf))
};
match result {
Ok(Ok(len)) => len as c_int,
Ok(Err(err)) => {
if retriable_error(&err) {
BIO_set_retry_write(bio);
}
state.error = Some(err);
-1
}
Err(err) => {
state.panic = Some(err);
-1
}
}
}
unsafe extern "C" fn bread<S: Read>(bio: *mut BIO, buf: *mut c_char, len: c_int) -> c_int {
BIO_clear_retry_flags(bio);
let state = state::<S>(bio);
let buf = slice::from_raw_parts_mut(buf as *mut _, len as usize);
let result = {
let mut youre_not_my_supervisor = AssertRecoverSafe::new(&mut *state);
let mut fuuuu = AssertRecoverSafe::new(buf);
recover(move || youre_not_my_supervisor.stream.read(&mut *fuuuu))
};
match result {
Ok(Ok(len)) => len as c_int,
Ok(Err(err)) => {
if retriable_error(&err) {
BIO_set_retry_read(bio);
}
state.error = Some(err);
-1
}
Err(err) => {
state.panic = Some(err);
-1
}
}
}
fn retriable_error(err: &io::Error) -> bool {
match err.kind() {
io::ErrorKind::WouldBlock | io::ErrorKind::NotConnected => true,
_ => false,
}
}
unsafe extern "C" fn bputs<S: Write>(bio: *mut BIO, s: *const c_char) -> c_int {
bwrite::<S>(bio, s, strlen(s) as c_int)
}
unsafe extern "C" fn ctrl<S: Write>(bio: *mut BIO,
cmd: c_int,
_num: c_long,
_ptr: *mut c_void)
-> c_long {
if cmd == BIO_CTRL_FLUSH {
let state = state::<S>(bio);
let result = {
let mut youre_not_my_supervisor = AssertRecoverSafe::new(&mut *state);
recover(move || youre_not_my_supervisor.stream.flush())
};
match result {
Ok(Ok(())) => 1,
Ok(Err(err)) => {
state.error = Some(err);
0
}
Err(err) => {
state.panic = Some(err);
0
}
}
} else {
0
}
}
unsafe extern "C" fn create(bio: *mut BIO) -> c_int {
(*bio).init = 0;
(*bio).num = 0;
(*bio).ptr = ptr::null_mut();
(*bio).flags = 0;
1
}
unsafe extern "C" fn destroy<S>(bio: *mut BIO) -> c_int {
if bio.is_null() {
return 0;
}
assert!(!(*bio).ptr.is_null());
Box::<StreamState<S>>::from_raw((*bio).ptr as *mut _);
(*bio).ptr = ptr::null_mut();
(*bio).init = 0;
1
}
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