use customized rpc implementation, remove Tarpc & Tonic (#348)

This patch removes Tarpc & Tonic GRPC and implements a customized rpc framework, which can be used by peer rpc and cli interface.

web config server can also use this rpc framework.

moreover, rewrite the public server logic, use ospf route to implement public server based networking. this make public server mesh possible.

easytier/src/peers/route_trait.rs

@@ -1,9 +1,6 @@
 use std::{net::Ipv4Addr, sync::Arc};
 
-use async_trait::async_trait;
-use tokio_util::bytes::Bytes;
-
-use crate::common::{error::Error, PeerId};
+use crate::common::PeerId;
 
 #[derive(Clone, Debug)]
 pub enum NextHopPolicy {
@@ -17,15 +14,9 @@ impl Default for NextHopPolicy {
     }
 }
 
-#[async_trait]
+#[async_trait::async_trait]
 pub trait RouteInterface {
     async fn list_peers(&self) -> Vec<PeerId>;
-    async fn send_route_packet(
-        &self,
-        msg: Bytes,
-        route_id: u8,
-        dst_peer_id: PeerId,
-    ) -> Result<(), Error>;
     fn my_peer_id(&self) -> PeerId;
 }
 
@@ -56,7 +47,7 @@ impl RouteCostCalculatorInterface for DefaultRouteCostCalculator {}
 
 pub type RouteCostCalculator = Box<dyn RouteCostCalculatorInterface>;
 
-#[async_trait]
+#[async_trait::async_trait]
 #[auto_impl::auto_impl(Box, Arc)]
 pub trait Route {
     async fn open(&self, interface: RouteInterfaceBox) -> Result<u8, ()>;
@@ -71,7 +62,7 @@ pub trait Route {
         self.get_next_hop(peer_id).await
     }
 
-    async fn list_routes(&self) -> Vec<crate::rpc::Route>;
+    async fn list_routes(&self) -> Vec<crate::proto::cli::Route>;
 
     async fn get_peer_id_by_ipv4(&self, _ipv4: &Ipv4Addr) -> Option<PeerId> {
         None