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diff --git a/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/plain_server.hpp b/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/plain_server.hpp
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+++ b/external_libs/python/pyzmq-14.7.0/bundled/zeromq/src/plain_server.hpp
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+/*
+    Copyright (c) 2007-2015 Contributors as noted in the AUTHORS file
+
+    This file is part of libzmq, the ZeroMQ core engine in C++.
+
+    libzmq is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License (LGPL) as published
+    by the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    As a special exception, the Contributors give you permission to link
+    this library with independent modules to produce an executable,
+    regardless of the license terms of these independent modules, and to
+    copy and distribute the resulting executable under terms of your choice,
+    provided that you also meet, for each linked independent module, the
+    terms and conditions of the license of that module. An independent
+    module is a module which is not derived from or based on this library.
+    If you modify this library, you must extend this exception to your
+    version of the library.
+
+    libzmq is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __ZMQ_PLAIN_SERVER_HPP_INCLUDED__
+#define __ZMQ_PLAIN_SERVER_HPP_INCLUDED__
+
+#include "mechanism.hpp"
+#include "options.hpp"
+
+namespace zmq
+{
+
+    class msg_t;
+    class session_base_t;
+
+    class plain_server_t : public mechanism_t
+    {
+    public:
+
+        plain_server_t (session_base_t *session_,
+                        const std::string &peer_address_,
+                        const options_t &options_);
+        virtual ~plain_server_t ();
+
+        // mechanism implementation
+        virtual int next_handshake_command (msg_t *msg_);
+        virtual int process_handshake_command (msg_t *msg_);
+        virtual int zap_msg_available ();
+        virtual status_t status () const;
+
+    private:
+
+        enum state_t {
+            waiting_for_hello,
+            sending_welcome,
+            waiting_for_initiate,
+            sending_ready,
+            waiting_for_zap_reply,
+            sending_error,
+            error_command_sent,
+            ready
+        };
+
+        session_base_t * const session;
+
+        const std::string peer_address;
+
+        //  Status code as received from ZAP handler
+        std::string status_code;
+
+        state_t state;
+
+        int produce_welcome (msg_t *msg_) const;
+        int produce_ready (msg_t *msg_) const;
+        int produce_error (msg_t *msg_) const;
+
+        int process_hello (msg_t *msg_);
+        int process_initiate (msg_t *msg_);
+
+        void send_zap_request (const std::string &username,
+                               const std::string &password);
+        int receive_and_process_zap_reply ();
+    };
+
+}
+
+#endif