extract some basic code from libcryptonote_core into libcryptonote_basic

src/cryptonote_basic/connection_context.h

@@ -0,0 +1,77 @@
+// Copyright (c) 2014-2016, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// 
+// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
+
+#pragma once
+#include <unordered_set>
+#include <atomic>
+#include "net/net_utils_base.h"
+#include "copyable_atomic.h"
+
+namespace cryptonote
+{
+
+  struct cryptonote_connection_context: public epee::net_utils::connection_context_base
+  {
+
+    enum state
+    {
+      state_befor_handshake = 0, //default state
+      state_synchronizing,
+      state_idle,
+      state_normal
+    };
+
+    state m_state;
+    std::list<crypto::hash> m_needed_objects;
+    std::unordered_set<crypto::hash> m_requested_objects;
+    uint64_t m_remote_blockchain_height;
+    uint64_t m_last_response_height;
+    epee::copyable_atomic m_callback_request_count; //in debug purpose: problem with double callback rise
+    //size_t m_score;  TODO: add score calculations
+  };
+
+  inline std::string get_protocol_state_string(cryptonote_connection_context::state s)
+  {
+    switch (s)
+    {
+    case cryptonote_connection_context::state_befor_handshake:
+      return "state_befor_handshake";
+    case cryptonote_connection_context::state_synchronizing:
+      return "state_synchronizing";
+    case cryptonote_connection_context::state_idle:
+      return "state_idle";
+    case cryptonote_connection_context::state_normal:
+      return "state_normal";
+    default:
+      return "unknown";
+    }    
+  }
+
+}