Rearrange stuff

include/Proxy.h

@@ -0,0 +1,19 @@
+// Proxy.h
+#pragma once
+#include <string>
+#include "SocketInterface.h"
+
+#define SMTP_STATE_WAIT_FOR_HELO 0
+#define SMTP_STATE_WAIT_FOR_MAILFROM 1
+#define SMTP_STATE_WAIT_FOR_RCPTTO 2
+#define SMTP_STATE_WAIT_FOR_DATA 3
+
+class Proxy {
+public:
+    Proxy(SocketInterface* outside_socket) : outside(outside_socket) {}
+    
+    void run(std::string& peer_address);
+
+private:
+    SocketInterface* outside;
+};