support p2p-only mode (#1598)

easytier/src/common/config.rs

@@ -35,6 +35,7 @@ pub fn gen_default_flags() -> Flags {
         use_smoltcp: false,
         relay_network_whitelist: "*".to_string(),
         disable_p2p: false,
+        p2p_only: false,
         relay_all_peer_rpc: false,
         disable_udp_hole_punching: false,
         multi_thread: true,

easytier/src/common/global_ctx.rs

@@ -84,6 +84,7 @@ pub struct GlobalCtx {
     enable_exit_node: bool,
     proxy_forward_by_system: bool,
     no_tun: bool,
+    p2p_only: bool,
 
     feature_flags: AtomicCell<PeerFeatureFlag>,
 
@@ -138,6 +139,7 @@ impl GlobalCtx {
         let enable_exit_node = config_fs.get_flags().enable_exit_node || cfg!(target_env = "ohos");
         let proxy_forward_by_system = config_fs.get_flags().proxy_forward_by_system;
         let no_tun = config_fs.get_flags().no_tun;
+        let p2p_only = config_fs.get_flags().p2p_only;
 
         let feature_flags = PeerFeatureFlag {
             kcp_input: !config_fs.get_flags().disable_kcp_input,
@@ -172,6 +174,7 @@ impl GlobalCtx {
             enable_exit_node,
             proxy_forward_by_system,
             no_tun,
+            p2p_only,
 
             feature_flags: AtomicCell::new(feature_flags),
             quic_proxy_port: AtomicCell::new(None),
@@ -421,6 +424,15 @@ impl GlobalCtx {
             .and_then(|acl_v1| acl_v1.group)
             .map_or_else(Vec::new, |group| group.declares.to_vec())
     }
+
+    pub fn p2p_only(&self) -> bool {
+        self.p2p_only
+    }
+
+    pub fn latency_first(&self) -> bool {
+        // NOTICE: p2p only is conflict with latency first
+        self.config.get_flags().latency_first && !self.p2p_only
+    }
 }
 
 #[cfg(test)]