completely removed unix socket based DNS resolving

ref shadowsocks/shadowsocks-android#2622

Author: zonyitoo

bin/common/validator/mod.rs

@@ -4,8 +4,6 @@
 
 use std::net::SocketAddr;
 
-#[cfg(feature = "local-dns")]
-use shadowsocks_service::config::NameServerAddr;
 use shadowsocks_service::shadowsocks::{relay::socks5::Address, ManagerAddr, ServerAddr, ServerConfig};
 
 macro_rules! validate_type {
@@ -31,12 +29,6 @@ validate_type!(
     ManagerAddr,
     "should be either ip:port, domain:port or /path/to/unix.sock"
 );
-#[cfg(feature = "local-dns")]
-validate_type!(
-    validate_name_server_addr,
-    NameServerAddr,
-    "should be either ip:port, domain:port or /path/to/unix.sock"
-);
 validate_type!(validate_u64, u64, "should be unsigned integer");
 validate_type!(validate_u32, u32, "should be unsigned integer");
 

bin/sslocal.rs

@@ -142,7 +142,7 @@ fn main() {
     #[cfg(feature = "local-dns")]
     {
         app = clap_app!(@app (app)
-            (@arg LOCAL_DNS_ADDR: --("local-dns-addr") +takes_value required_if("PROTOCOL", "dns") {validator::validate_name_server_addr} "Specify the address of local DNS server, send queries directly")
+            (@arg LOCAL_DNS_ADDR: --("local-dns-addr") +takes_value required_if("PROTOCOL", "dns") {validator::validate_socket_addr} "Specify the address of local DNS server, send queries directly")
             (@arg REMOTE_DNS_ADDR: --("remote-dns-addr") +takes_value required_if("PROTOCOL", "dns") {validator::validate_address} "Specify the address of remote DNS server, send queries through shadowsocks' tunnel")
             (@arg DNS_LOCAL_ADDR: --("dns-addr") +takes_value requires_all(&["REMOTE_DNS_ADDR"]) {validator::validate_server_addr} "DNS address, listen to this address if specified")
         );
@@ -240,10 +240,10 @@ fn main() {
 
     #[cfg(feature = "local-dns")]
     {
-        use shadowsocks_service::config::NameServerAddr;
+        use std::net::SocketAddr;
 
         if let Some(local_dns_addr) = matches.value_of("LOCAL_DNS_ADDR") {
-            let addr = local_dns_addr.parse::<NameServerAddr>().expect("local dns address");
+            let addr = local_dns_addr.parse::<SocketAddr>().expect("local dns address");
             config.local_dns_addr = Some(addr);
         }
 
@@ -263,12 +263,6 @@ fn main() {
         // A socket `protect_path` in CWD
         // Same as shadowsocks-libev's android.c
         config.outbound_vpn_protect_path = Some(From::from("protect_path"));
-
-        // Set default config.local_dns_addr
-        #[cfg(feature = "local-dns")]
-        if config.local_dns_addr.is_none() {
-            config.local_dns_addr = Some(From::from("local_dns_path"));
-        }
     }
 
     if let Some(local_addr) = matches.value_of("LOCAL_ADDR") {

crates/shadowsocks-service/Cargo.toml

@@ -42,7 +42,7 @@ dns-over-tls = ["trust-dns", "trust-dns-resolver/dns-over-tls", "trust-dns-resol
 dns-over-https = ["trust-dns", "trust-dns-resolver/dns-over-https"]
 
 # Enable DNS-relay
-local-dns = ["local", "trust-dns-proto", "rand"]
+local-dns = ["local", "trust-dns", "trust-dns-proto", "rand"]
 # Backward compatibility, DO NOT USE
 local-dns-relay = ["local-dns"]
 # Enable client flow statistic report

crates/shadowsocks-service/src/config.rs

@@ -70,8 +70,6 @@ use shadowsocks::{
 use trust_dns_resolver::config::{NameServerConfig, Protocol, ResolverConfig};
 
 use crate::acl::AccessControl;
-#[cfg(feature = "local-dns")]
-pub use crate::local::dns::config::NameServerAddr;
 
 #[cfg(feature = "trust-dns")]
 #[derive(Serialize, Deserialize, Debug)]
@@ -576,7 +574,7 @@ pub struct Config {
     ///
     /// Sending DNS query directly to this address
     #[cfg(feature = "local-dns")]
-    pub local_dns_addr: Option<NameServerAddr>,
+    pub local_dns_addr: Option<SocketAddr>,
     /// Remote DNS's address
     ///
     /// Sending DNS query through proxy to this address

crates/shadowsocks-service/src/local/dns/client_cache.rs

@@ -121,6 +121,7 @@ impl DnsClientCache {
     }
 
     #[cfg(unix)]
+    #[allow(dead_code)]
     pub async fn lookup_unix_stream<P: AsRef<Path>>(&self, ns: &P, msg: Message) -> Result<Message, ProtoError> {
         let mut last_err = None;
 

crates/shadowsocks-service/src/local/dns/config.rs

@@ -3,7 +3,5 @@
 pub use self::server::Dns;
 
 mod client_cache;
-pub mod config;
-pub mod dns_resolver;
 pub mod server;
 mod upstream;