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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::marker::PhantomData;
use std::mem;
use std::slice;
use std::sync::Mutex;
use std::ptr;
use ssl::error::SslError;
pub struct StreamState<S> {
pub stream: S,
pub error: Option<io::Error>,
}
pub fn new_bio<S: Read + Write>(stream: S) -> Result<(*mut BIO, Box<BIO_METHOD>), SslError> {
// "rust"
static NAME: [c_char; 5] = [114, 117, 115, 116, 0];
let method = Box::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),
callback_ctrl: None,
});
let state = Box::new(StreamState {
stream: stream,
error: None,
});
unsafe {
let bio = BIO_new(&*method);
if bio.is_null() {
return Err(SslError::get());
}
(*bio).ptr = Box::into_raw(state) as *mut _;
return Ok((bio, method));
}
}
pub unsafe fn take_error<S>(bio: *mut BIO) -> Option<io::Error> {
let state = state::<S>(bio);
state.error.take()
}
pub unsafe fn take_stream<S>(bio: *mut BIO) -> S {
let state: Box<StreamState<S>> = Box::from_raw((*bio).ptr as *mut _);
(*bio).ptr = ptr::null_mut();
state.stream
}
unsafe fn state<'a, S: 'a>(bio: *mut BIO) -> &'a mut StreamState<S> {
mem::transmute((*bio).ptr)
}
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);
match state.stream.write(buf) {
Ok(len) => len as c_int,
Err(err) => {
if err.kind() == io::ErrorKind::WouldBlock {
BIO_set_retry_write(bio);
}
state.error = 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);
match state.stream.read(buf) {
Ok(len) => len as c_int,
Err(err) => {
if err.kind() == io::ErrorKind::WouldBlock {
BIO_set_retry_read(bio);
}
state.error = Some(err);
-1
}
}
}
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);
match state.stream.flush() {
Ok(()) => 1,
Err(err) => {
state.error = 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(bio: *mut BIO) -> c_int {
if bio.is_null() {
return 0;
}
assert!((*bio).ptr.is_null());
1
}
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