use std::ffi::CStr;
use std::fmt;
use std::marker::PhantomData;
use std::os::raw::{c_char, c_int, c_uchar, c_void};
use std::ptr;
use std::slice;
use itertools::Itertools;
use crate::error::{Error, Result};
use crate::panic;
#[derive(Debug)]
pub struct NAPTRResults {
naptr_reply: *mut c_ares_sys::ares_naptr_reply,
phantom: PhantomData<c_ares_sys::ares_naptr_reply>,
}
#[derive(Clone, Copy)]
pub struct NAPTRResult<'a> {
naptr_reply: &'a c_ares_sys::ares_naptr_reply,
}
impl NAPTRResults {
pub fn parse_from(data: &[u8]) -> Result<NAPTRResults> {
let mut naptr_reply: *mut c_ares_sys::ares_naptr_reply = ptr::null_mut();
let parse_status = unsafe {
c_ares_sys::ares_parse_naptr_reply(data.as_ptr(), data.len() as c_int, &mut naptr_reply)
};
if parse_status == c_ares_sys::ARES_SUCCESS {
let naptr_result = NAPTRResults::new(naptr_reply);
Ok(naptr_result)
} else {
Err(Error::from(parse_status))
}
}
fn new(reply: *mut c_ares_sys::ares_naptr_reply) -> Self {
NAPTRResults {
naptr_reply: reply,
phantom: PhantomData,
}
}
pub fn iter(&self) -> NAPTRResultsIter {
NAPTRResultsIter {
next: unsafe { self.naptr_reply.as_ref() },
}
}
}
impl fmt::Display for NAPTRResults {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
let results = self.iter().format("}, {");
write!(fmt, "[{{{}}}]", results)
}
}
#[derive(Clone, Copy)]
pub struct NAPTRResultsIter<'a> {
next: Option<&'a c_ares_sys::ares_naptr_reply>,
}
impl<'a> Iterator for NAPTRResultsIter<'a> {
type Item = NAPTRResult<'a>;
fn next(&mut self) -> Option<Self::Item> {
let opt_reply = self.next;
self.next = opt_reply.and_then(|reply| unsafe { reply.next.as_ref() });
opt_reply.map(|reply| NAPTRResult { naptr_reply: reply })
}
}
impl<'a> IntoIterator for &'a NAPTRResults {
type Item = NAPTRResult<'a>;
type IntoIter = NAPTRResultsIter<'a>;
fn into_iter(self) -> Self::IntoIter {
self.iter()
}
}
impl Drop for NAPTRResults {
fn drop(&mut self) {
unsafe { c_ares_sys::ares_free_data(self.naptr_reply as *mut c_void) }
}
}
unsafe impl Send for NAPTRResults {}
unsafe impl Sync for NAPTRResults {}
unsafe impl<'a> Send for NAPTRResult<'a> {}
unsafe impl<'a> Sync for NAPTRResult<'a> {}
unsafe impl<'a> Send for NAPTRResultsIter<'a> {}
unsafe impl<'a> Sync for NAPTRResultsIter<'a> {}
impl<'a> NAPTRResult<'a> {
pub fn flags(self) -> &'a CStr {
unsafe { CStr::from_ptr(self.naptr_reply.flags as *const c_char) }
}
pub fn service_name(self) -> &'a CStr {
unsafe { CStr::from_ptr(self.naptr_reply.service as *const c_char) }
}
pub fn reg_exp(self) -> &'a CStr {
unsafe { CStr::from_ptr(self.naptr_reply.regexp as *const c_char) }
}
pub fn replacement_pattern(self) -> &'a CStr {
unsafe { CStr::from_ptr(self.naptr_reply.replacement) }
}
pub fn order(self) -> u16 {
self.naptr_reply.order
}
pub fn preference(self) -> u16 {
self.naptr_reply.preference
}
}
impl<'a> fmt::Display for NAPTRResult<'a> {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
write!(
fmt,
"Flags: {}, ",
self.flags().to_str().unwrap_or("<not utf8>")
)?;
write!(
fmt,
"Service name: {}, ",
self.service_name().to_str().unwrap_or("<not utf8>")
)?;
write!(
fmt,
"Regular expression: {}, ",
self.reg_exp().to_str().unwrap_or("<not utf8>")
)?;
write!(
fmt,
"Replacement pattern: {}, ",
self.replacement_pattern().to_str().unwrap_or("<not utf8>")
)?;
write!(fmt, "Order: {}, ", self.order())?;
write!(fmt, "Preference: {}", self.preference())
}
}
pub(crate) unsafe extern "C" fn query_naptr_callback<F>(
arg: *mut c_void,
status: c_int,
_timeouts: c_int,
abuf: *mut c_uchar,
alen: c_int,
) where
F: FnOnce(Result<NAPTRResults>) + Send + 'static,
{
ares_callback!(arg as *mut F, status, abuf, alen, NAPTRResults::parse_from);
}