Make the project compatible with rust-stable

Cargo.toml

@@ -22,6 +22,7 @@ derivative = "1.0.3"
 dnsstamps = "0.1.2"
 env_logger = { version="0.7.1", default-features = false, features = ["humantime"] }
 futures-preview = { version = "=0.3.0-alpha.19", features = ["async-await"] }
+ipext = "0.1.0"
 jemallocator = "0.3.2"
 libsodium-sys-stable="1.18.2"
 log = { version = "0.4.8", features = ["std", "release_max_level_debug"] }

README.md

@@ -36,7 +36,7 @@ In this package, the example configuration file can be found in `/usr/share/doc/
 
 ### Option 2: compilation from source code
 
-The proxy uses recent features of the Rust compiler, and currently requires rust-nightly.
+The proxy uses recent features of the Rust compiler, and requires rust >= 1.0.39 or rust-nightly.
 
 Rust can installed with:
 

src/anonymized_dns.rs

@@ -2,6 +2,7 @@ use crate::errors::*;
 use crate::*;
 
 use byteorder::{BigEndian, ByteOrder};
+use ipext::IpExt;
 use siphasher::sip128::Hasher128;
 use std::hash::Hasher;
 use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, SocketAddrV6};
@@ -43,7 +44,7 @@ pub async fn handle_anonymized_dns(
     #[cfg(feature = "metrics")]
     globals.varz.anonymized_queries.inc();
 
-    ensure!(ip.is_global(), "Forbidden upstream address");
+    ensure!(IpExt::is_global(&ip), "Forbidden upstream address");
     ensure!(
         !globals.anonymized_dns_blacklisted_ips.contains(&ip),
         "Blacklisted upstream IP"

src/main.rs

@@ -2,7 +2,6 @@
 #![allow(clippy::type_complexity)]
 #![allow(clippy::cognitive_complexity)]
 #![allow(dead_code)]
-#![feature(ip)]
 
 #[global_allocator]
 static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;