1 /*
2     Copyright (c) 2007-2019 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_WSS_ENGINE_HPP_INCLUDED__
31 #define __ZMQ_WSS_ENGINE_HPP_INCLUDED__
32 
33 #include <gnutls/gnutls.h>
34 #include "ws_engine.hpp"
35 
36 #define WSS_BUFFER_SIZE 8192
37 
38 namespace zmq
39 {
40 class wss_engine_t : public ws_engine_t
41 {
42   public:
43     wss_engine_t (fd_t fd_,
44                   const options_t &options_,
45                   const endpoint_uri_pair_t &endpoint_uri_pair_,
46                   ws_address_t &address_,
47                   bool client_,
48                   void *tls_server_cred_,
49                   const std::string &hostname_);
50     ~wss_engine_t ();
51 
52     void out_event ();
53 
54   protected:
55     bool handshake ();
56     void plug_internal ();
57     int read (void *data, size_t size_);
58     int write (const void *data_, size_t size_);
59 
60   private:
61     bool do_handshake ();
62 
63     bool _established;
64     gnutls_certificate_credentials_t _tls_client_cred;
65     gnutls_session_t _tls_session;
66 };
67 }
68 
69 #endif
70