daemon: don't drop RPC with busy error when running offline

src/cryptonote_protocol/cryptonote_protocol_handler.h

@@ -79,7 +79,7 @@ namespace cryptonote
     typedef t_cryptonote_protocol_handler<t_core> cryptonote_protocol_handler;
     typedef CORE_SYNC_DATA payload_type;
 
-    t_cryptonote_protocol_handler(t_core& rcore, nodetool::i_p2p_endpoint<connection_context>* p_net_layout);
+    t_cryptonote_protocol_handler(t_core& rcore, nodetool::i_p2p_endpoint<connection_context>* p_net_layout, bool offline = false);
 
     BEGIN_INVOKE_MAP2(cryptonote_protocol_handler)
       HANDLE_NOTIFY_T2(NOTIFY_NEW_BLOCK, &cryptonote_protocol_handler::handle_notify_new_block)

src/cryptonote_protocol/cryptonote_protocol_handler.inl

@@ -61,10 +61,10 @@ namespace cryptonote
 
   //-----------------------------------------------------------------------------------------------------------------------
   template<class t_core>
-    t_cryptonote_protocol_handler<t_core>::t_cryptonote_protocol_handler(t_core& rcore, nodetool::i_p2p_endpoint<connection_context>* p_net_layout):m_core(rcore),
+    t_cryptonote_protocol_handler<t_core>::t_cryptonote_protocol_handler(t_core& rcore, nodetool::i_p2p_endpoint<connection_context>* p_net_layout, bool offline):m_core(rcore),
                                                                                                               m_p2p(p_net_layout),
                                                                                                               m_syncronized_connections_count(0),
-                                                                                                              m_synchronized(false),
+                                                                                                              m_synchronized(offline),
                                                                                                               m_stopping(false)
 
   {

src/daemon/daemon.cpp

@@ -68,7 +68,7 @@ public:
       boost::program_options::variables_map const & vm
     )
     : core{vm}
-    , protocol{vm, core}
+    , protocol{vm, core, command_line::get_arg(vm, cryptonote::arg_offline)}
     , p2p{vm, protocol}
   {
     // Handle circular dependencies

src/daemon/protocol.h

@@ -46,9 +46,9 @@ private:
 public:
   t_protocol(
       boost::program_options::variables_map const & vm
-    , t_core & core
+    , t_core & core, bool offline = false
     )
-    : m_protocol{core.get(), nullptr}
+    : m_protocol{core.get(), nullptr, offline}
   {
     MGINFO("Initializing cryptonote protocol...");
     if (!m_protocol.init(vm))