1/*
2 Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
3
4 This file is part of libzmq, the ZeroMQ core engine in C++.
5
6 libzmq is free software; you can redistribute it and/or modify it under
7 the terms of the GNU Lesser General Public License (LGPL) as published
8 by the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
10
11 As a special exception, the Contributors give you permission to link
12 this library with independent modules to produce an executable,
13 regardless of the license terms of these independent modules, and to
14 copy and distribute the resulting executable under terms of your choice,
15 provided that you also meet, for each linked independent module, the
16 terms and conditions of the license of that module. An independent
17 module is a module which is not derived from or based on this library.
18 If you modify this library, you must extend this exception to your
19 version of the library.
20
21 libzmq is distributed in the hope that it will be useful, but WITHOUT
22 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
23 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
24 License for more details.
25
26 You should have received a copy of the GNU Lesser General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>.
28*/
29
30#ifndef __ZMQ_CURVE_CLIENT_HPP_INCLUDED__
31#define __ZMQ_CURVE_CLIENT_HPP_INCLUDED__
32
33#ifdef ZMQ_HAVE_CURVE
34
35#include "curve_mechanism_base.hpp"
36#include "options.hpp"
37#include "curve_client_tools.hpp"
38
39namespace zmq
40{
41class msg_t;
42class session_base_t;
43
44class curve_client_t : public curve_mechanism_base_t
45{
46 public:
47 curve_client_t (session_base_t *session_, const options_t &options_);
48 virtual ~curve_client_t ();
49
50 // mechanism implementation
51 virtual int next_handshake_command (msg_t *msg_);
52 virtual int process_handshake_command (msg_t *msg_);
53 virtual int encode (msg_t *msg_);
54 virtual int decode (msg_t *msg_);
55 virtual status_t status () const;
56
57 private:
58 enum state_t
59 {
60 send_hello,
61 expect_welcome,
62 send_initiate,
63 expect_ready,
64 error_received,
65 connected
66 };
67
68 // Current FSM state
69 state_t _state;
70
71 // CURVE protocol tools
72 curve_client_tools_t _tools;
73
74 int produce_hello (msg_t *msg_);
75 int process_welcome (const uint8_t *msg_data_, size_t msg_size_);
76 int produce_initiate (msg_t *msg_);
77 int process_ready (const uint8_t *msg_data_, size_t msg_size_);
78 int process_error (const uint8_t *msg_data_, size_t msg_size_);
79};
80}
81
82#endif
83
84#endif
85