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use std::ptr;
use std::ffi::CStr;
use gsasl_sys::*;
use gsasl_sys::Gsasl_rc::*;
use crate::Property;
use crate::buffer::{SaslBuffer, SaslString};
use crate::error::{Result, SaslError};
use discard::{Discard};
#[derive(Debug)]
pub struct Session<D> {
ptr: *mut Gsasl_session,
phantom: std::marker::PhantomData<D>,
}
#[derive(Debug)]
pub enum Step<T> {
Done(T),
NeedsMore(T),
}
pub type StepResult<T> = Result<Step<T>>;
impl<D> Session<D> {
pub fn step(&mut self, input: &[u8]) -> StepResult<SaslBuffer> {
let mut output: *mut libc::c_char = ptr::null_mut();
let mut output_len: size_t = 0;
let res = unsafe {
gsasl_step(self.ptr,
input.as_ptr() as *const libc::c_char,
input.len() as size_t,
&mut output as *mut *mut libc::c_char,
&mut output_len as *mut size_t
)
};
if res == (GSASL_OK as libc::c_int) {
Ok(Step::Done(SaslBuffer::from_parts(output, output_len as usize)))
} else if res == (GSASL_NEEDS_MORE as libc::c_int) {
Ok(Step::NeedsMore(SaslBuffer::from_parts(output, output_len as usize)))
} else {
Err(SaslError(res))
}
}
pub fn step64(&mut self, input: &CStr) -> StepResult<SaslString> {
let mut output: *mut libc::c_char = ptr::null_mut();
let res = unsafe {
gsasl_step64(self.ptr, input.as_ptr(), &mut output as *mut *mut libc::c_char)
};
if res == (GSASL_OK as libc::c_int) {
Ok(Step::Done(SaslString::from_raw(output)))
} else if res == (GSASL_NEEDS_MORE as libc::c_int) {
Ok(Step::NeedsMore(SaslString::from_raw(output)))
} else {
Err(SaslError(res))
}
}
pub fn set_property(&mut self, prop: Property, data: &[u8]) {
let data_ptr = data.as_ptr() as *const libc::c_char;
let len = data.len() as size_t;
unsafe {
gsasl_property_set_raw(self.ptr, prop as Gsasl_property, data_ptr, len);
}
}
pub fn get_property(&self, prop: Property) -> Option<&CStr> {
unsafe {
let ptr = gsasl_property_fast(self.ptr, prop as Gsasl_property);
if !ptr.is_null() {
Some(CStr::from_ptr(ptr))
} else {
None
}
}
}
pub fn store(&mut self, data: Box<D>) {
unsafe {
gsasl_session_hook_set(self.ptr, Box::into_raw(data) as *mut libc::c_void);
}
}
pub unsafe fn retrieve(&mut self) -> Option<Box<D>> {
let ptr = gsasl_session_hook_get(self.ptr);
gsasl_session_hook_set(self.ptr, std::ptr::null_mut());
if !ptr.is_null() {
Some(Box::from_raw(ptr as *mut D))
} else {
None
}
}
pub fn retrieve_mut(&mut self) -> Option<&mut D> {
unsafe {
let ptr = gsasl_session_hook_get(self.ptr) as *mut D;
ptr.as_mut()
}
}
pub(crate) fn from_ptr(ptr: *mut Gsasl_session) -> Self {
let phantom = std::marker::PhantomData;
Self { ptr, phantom }
}
pub(crate) fn as_ptr(&self) -> *mut Gsasl_session {
self.ptr
}
pub(crate) fn finish(&mut self) {
unsafe { gsasl_finish(self.ptr) };
}
}
impl<D> Discard for Session<D> {
fn discard(mut self) {
unsafe { self.retrieve(); }
self.finish();
}
}