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use super::SetOpt;
use curl::easy::Easy2;
use std::{
iter::FromIterator,
net::SocketAddr,
time::Duration,
};
#[derive(Clone, Debug)]
pub enum DnsCache {
Disable,
Timeout(Duration),
Forever,
}
impl Default for DnsCache {
fn default() -> Self {
Duration::from_secs(60).into()
}
}
impl From<Duration> for DnsCache {
fn from(duration: Duration) -> Self {
DnsCache::Timeout(duration)
}
}
impl SetOpt for DnsCache {
#[allow(unsafe_code)]
fn set_opt<H>(&self, easy: &mut Easy2<H>) -> Result<(), curl::Error> {
let value = match self {
DnsCache::Disable => 0,
DnsCache::Timeout(duration) => duration.as_secs() as i64,
DnsCache::Forever => -1,
};
unsafe {
match curl_sys::curl_easy_setopt(easy.raw(), curl_sys::CURLOPT_DNS_CACHE_TIMEOUT, value) {
curl_sys::CURLE_OK => Ok(()),
code => Err(curl::Error::new(code)),
}
}
}
}
#[derive(Clone, Debug)]
pub(crate) struct Servers(String);
impl FromIterator<SocketAddr> for Servers {
fn from_iter<I: IntoIterator<Item = SocketAddr>>(iter: I) -> Self {
Servers(iter.into_iter()
.map(|addr| addr.to_string())
.collect::<Vec<_>>()
.join(","))
}
}
impl SetOpt for Servers {
fn set_opt<H>(&self, easy: &mut Easy2<H>) -> Result<(), curl::Error> {
if let Err(e) = easy.dns_servers(&self.0) {
log::warn!("DNS servers could not be configured: {}", e);
}
Ok(())
}
}