add DnsConfig and ZoneConfig with proto definitions

easytier/src/common/config.rs

@@ -16,6 +16,7 @@ use tokio::io::AsyncReadExt as _;
 
 use crate::{
     common::stun::StunInfoCollector,
+    dns::config::DnsConfig,
     instance::dns_server::DEFAULT_ET_DNS_ZONE,
     proto::{
         acl::Acl,
@@ -207,6 +208,9 @@ pub trait ConfigLoader: Send + Sync {
     }
     fn set_credential_file(&self, _path: Option<std::path::PathBuf>) {}
 
+    fn get_dns(&self) -> DnsConfig;
+    fn set_dns(&self, dns: DnsConfig);
+
     fn dump(&self) -> String;
 }
 
@@ -444,6 +448,8 @@ struct Config {
     peer: Option<Vec<PeerConfig>>,
     proxy_network: Option<Vec<ProxyNetworkConfig>>,
 
+    dns: Option<DnsConfig>,
+
     vpn_portal_config: Option<VpnPortalConfig>,
 
     routes: Option<Vec<cidr::Ipv4Cidr>>,
@@ -868,6 +874,14 @@ impl ConfigLoader for TomlConfigLoader {
         self.config.lock().unwrap().credential_file = path;
     }
 
+    fn get_dns(&self) -> DnsConfig {
+        self.config.lock().unwrap().dns.clone().unwrap_or_default()
+    }
+
+    fn set_dns(&self, dns: DnsConfig) {
+        self.config.lock().unwrap().dns = Some(dns);
+    }
+
     fn dump(&self) -> String {
         let default_flags_json = serde_json::to_string(&gen_default_flags()).unwrap();
         let default_flags_hashmap =