ip hashing + test

src/balancer/mod.rs

@@ -6,7 +6,19 @@ pub mod ip_hashing;
 use std::fmt::Debug;
 use std::sync::Arc;
 use crate::backend::Backend;
+use std::cell::RefCell;
+use std::net::{SocketAddr};
+
+thread_local! {
+    pub static CURRENT_CONNECTION_INFO: RefCell<Option<ConnectionInfo>> = RefCell::new(None);
+}
+
+#[derive(Clone, Debug)] 
+pub struct ConnectionInfo {
+    pub client_ip : SocketAddr,
+}
 
 pub trait Balancer: Debug + Send + Sync + 'static {
     fn choose_backend(&mut self) -> Option<Arc<Backend>>;
 }
+