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use std::fmt;
use std::os::raw::{c_int, c_uchar, c_void};
use std::ptr;
use std::slice;
use c_ares_sys;
use c_types;
use error::{Error, Result};
use hostent::{HasHostent, HostAddressResultsIter, HostAliasResultsIter, HostentOwned};
use panic;
#[derive(Debug)]
pub struct CNameResults {
hostent: HostentOwned,
}
impl CNameResults {
pub fn parse_from(data: &[u8]) -> Result<CNameResults> {
let mut hostent: *mut c_types::hostent = ptr::null_mut();
let parse_status = unsafe {
c_ares_sys::ares_parse_a_reply(
data.as_ptr(),
data.len() as c_int,
&mut hostent,
ptr::null_mut(),
ptr::null_mut(),
)
};
if parse_status == c_ares_sys::ARES_SUCCESS {
let result = CNameResults::new(hostent);
Ok(result)
} else {
Err(Error::from(parse_status))
}
}
fn new(hostent: *mut c_types::hostent) -> CNameResults {
CNameResults {
hostent: HostentOwned::new(hostent),
}
}
pub fn hostname(&self) -> &str {
self.hostent.hostname()
}
pub fn addresses(&self) -> HostAddressResultsIter {
self.hostent.addresses()
}
pub fn aliases(&self) -> HostAliasResultsIter {
self.hostent.aliases()
}
}
impl fmt::Display for CNameResults {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
self.hostent.display(fmt)
}
}
pub unsafe extern "C" fn query_cname_callback<F>(
arg: *mut c_void,
status: c_int,
_timeouts: c_int,
abuf: *mut c_uchar,
alen: c_int,
) where
F: FnOnce(Result<CNameResults>) + Send + 'static,
{
ares_callback!(arg as *mut F, status, abuf, alen, CNameResults::parse_from);
}