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use std::ffi::CStr;
use std::fmt;
use std::marker::PhantomData;
use std::os::raw::{c_int, c_uchar, c_void};
use std::ptr;
use std::slice;
use std::str;
use c_ares_sys;
use error::{Error, Result};
use panic;
#[derive(Debug)]
pub struct SOAResult {
soa_reply: *mut c_ares_sys::ares_soa_reply,
phantom: PhantomData<c_ares_sys::ares_soa_reply>,
}
impl SOAResult {
pub fn parse_from(data: &[u8]) -> Result<SOAResult> {
let mut soa_reply: *mut c_ares_sys::ares_soa_reply = ptr::null_mut();
let parse_status = unsafe {
c_ares_sys::ares_parse_soa_reply(data.as_ptr(), data.len() as c_int, &mut soa_reply)
};
if parse_status == c_ares_sys::ARES_SUCCESS {
let result = SOAResult::new(soa_reply);
Ok(result)
} else {
Err(Error::from(parse_status))
}
}
fn new(soa_reply: *mut c_ares_sys::ares_soa_reply) -> SOAResult {
SOAResult {
soa_reply,
phantom: PhantomData,
}
}
pub fn name_server(&self) -> &str {
unsafe {
let c_str = CStr::from_ptr((*self.soa_reply).nsname);
str::from_utf8_unchecked(c_str.to_bytes())
}
}
pub fn hostmaster(&self) -> &str {
unsafe {
let c_str = CStr::from_ptr((*self.soa_reply).hostmaster);
str::from_utf8_unchecked(c_str.to_bytes())
}
}
pub fn serial(&self) -> u32 {
unsafe { (*self.soa_reply).serial }
}
pub fn refresh(&self) -> u32 {
unsafe { (*self.soa_reply).refresh }
}
pub fn retry(&self) -> u32 {
unsafe { (*self.soa_reply).retry }
}
pub fn expire(&self) -> u32 {
unsafe { (*self.soa_reply).expire }
}
pub fn min_ttl(&self) -> u32 {
unsafe { (*self.soa_reply).minttl }
}
}
impl fmt::Display for SOAResult {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
write!(fmt, "Name server: {}, ", self.name_server())?;
write!(fmt, "Hostmaster: {}, ", self.hostmaster())?;
write!(fmt, "Serial: {}, ", self.serial())?;
write!(fmt, "Refresh: {}, ", self.refresh())?;
write!(fmt, "Retry: {}, ", self.retry())?;
write!(fmt, "Expire: {}, ", self.expire())?;
write!(fmt, "Minimum time-to-live: {}", self.min_ttl())
}
}
impl Drop for SOAResult {
fn drop(&mut self) {
unsafe {
c_ares_sys::ares_free_data(self.soa_reply as *mut c_void);
}
}
}
unsafe impl Send for SOAResult {}
unsafe impl Sync for SOAResult {}
pub unsafe extern "C" fn query_soa_callback<F>(
arg: *mut c_void,
status: c_int,
_timeouts: c_int,
abuf: *mut c_uchar,
alen: c_int,
) where
F: FnOnce(Result<SOAResult>) + Send + 'static,
{
ares_callback!(arg as *mut F, status, abuf, alen, SOAResult::parse_from);
}