store DnsServer in GlobalCtx, load routes from DnsServer in ProxyCidrsMonitor

easytier/src/common/global_ctx.rs

@@ -32,7 +32,9 @@ use crate::{
 };
 use crossbeam::atomic::AtomicCell;
 use hmac::{Hmac, Mac};
+use parking_lot::RwLock;
 use sha2::Sha256;
+use crate::dns::server::DnsServer;
 use socket2::Protocol;
 
 pub type NetworkIdentity = crate::common::config::NetworkIdentity;
@@ -202,6 +204,8 @@ pub struct GlobalCtx {
 
     hostname: Mutex<String>,
 
+    dns: RwLock<Option<Arc<DnsServer>>>,
+
     stun_info_collection: Mutex<Arc<dyn StunInfoCollectorTrait>>,
 
     running_listeners: Mutex<Vec<url::Url>>,
@@ -298,6 +302,8 @@ impl GlobalCtx {
                 stun_info_collector.clone(),
             )))),
 
+            dns: RwLock::new(None),
+
             hostname: Mutex::new(hostname),
 
             stun_info_collection: Mutex::new(stun_info_collector),
@@ -416,6 +422,14 @@ impl GlobalCtx {
         self.ip_collector.lock().unwrap().as_ref().unwrap().clone()
     }
 
+    pub fn get_dns(&self) -> Option<Arc<DnsServer>> {
+        self.dns.read().clone()
+    }
+
+    pub fn set_dns(&self, dns: Option<Arc<DnsServer>>) {
+        *self.dns.write() = dns;
+    }
+
     pub fn get_hostname(&self) -> String {
         return self.hostname.lock().unwrap().clone();
     }