Implemented rotating DNS upstreams from config. Fixed warnings.

src/p2p/network.rs

@@ -2,7 +2,7 @@ extern crate serde;
 extern crate serde_json;
 
 use std::{io, thread};
-use std::io::{Read, Write, Error};
+use std::io::{Read, Write};
 use std::sync::{Arc, Mutex};
 use std::time::{Duration, Instant};
 
@@ -10,10 +10,11 @@ use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt};
 use mio::{Events, Interest, Poll, Registry, Token};
 use mio::event::Event;
 use mio::net::{TcpListener, TcpStream};
+#[allow(unused_imports)]
 use log::{trace, debug, info, warn, error};
 
 use crate::{Context, Block, p2p::Message, p2p::State, p2p::Peer, p2p::Peers};
-use std::net::{SocketAddr, IpAddr, SocketAddrV4, Shutdown, ToSocketAddrs};
+use std::net::{SocketAddr, IpAddr, SocketAddrV4, ToSocketAddrs};
 
 const SERVER: Token = Token(0);
 const POLL_TIMEOUT: Option<Duration> = Some(Duration::from_millis(3000));

src/p2p/peers.rs

@@ -6,6 +6,7 @@ use crate::p2p::{Peer, State, Message};
 use crate::p2p::network::LISTEN_PORT;
 use crate::p2p::network::next;
 use rand::random;
+#[allow(unused_imports)]
 use log::{trace, debug, info, warn, error};
 
 pub struct Peers {
@@ -33,12 +34,12 @@ impl Peers {
     }
 
     pub fn close_peer(&mut self, registry: &Registry, token: &Token) {
-        let mut peer = self.peers.get_mut(token);
+        let peer = self.peers.get_mut(token);
         match peer {
-            Some(mut peer) => {
-                let mut stream = peer.get_stream();
+            Some(peer) => {
+                let stream = peer.get_stream();
                 let _ = stream.shutdown(Shutdown::Both);
-                registry.deregister(stream);
+                let _ = registry.deregister(stream);
                 info!("Peer connection {:?} has shut down", &peer.get_addr());
 
                 if !peer.disabled() && !peer.is_inbound() {
@@ -169,7 +170,7 @@ fn skip_addr(addr: &SocketAddr) -> bool {
                 return true;
             }
         }
-        SocketAddr::V6(addr) => {
+        SocketAddr::V6(_addr) => {
             // TODO uncomment when stabilized
             // if addr.ip().is_unique_local() {
             //     return true;