WebSocket++  0.8.0-dev
C++ websocket client/server library
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network.hpp
1 /*
2  * Copyright (c) 2014, Peter Thorson. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are met:
6  * * Redistributions of source code must retain the above copyright
7  * notice, this list of conditions and the following disclaimer.
8  * * Redistributions in binary form must reproduce the above copyright
9  * notice, this list of conditions and the following disclaimer in the
10  * documentation and/or other materials provided with the distribution.
11  * * Neither the name of the WebSocket++ Project nor the
12  * names of its contributors may be used to endorse or promote products
13  * derived from this software without specific prior written permission.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
19  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
24  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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26  */
27 
28 #ifndef WEBSOCKETPP_COMMON_NETWORK_HPP
29 #define WEBSOCKETPP_COMMON_NETWORK_HPP
30 
31 // For ntohs and htons
32 #if defined(_WIN32)
33  #include <winsock2.h>
34 #else
35  //#include <arpa/inet.h>
36  #include <netinet/in.h>
37 #endif
38 
39 #include <websocketpp/common/stdint.hpp>
40 
41 namespace websocketpp {
42 namespace lib {
43 namespace net {
44 
45 inline bool is_little_endian() {
46  short int val = 0x1;
47  char *ptr = reinterpret_cast<char *>(&val);
48  return (ptr[0] == 1);
49 }
50 
51 #define TYP_INIT 0
52 #define TYP_SMLE 1
53 #define TYP_BIGE 2
54 
55 /// Convert 64 bit value to network byte order
56 /**
57  * This method is prefixed to avoid conflicts with operating system level
58  * macros for this functionality.
59  *
60  * TODO: figure out if it would be beneficial to use operating system level
61  * macros for this.
62  *
63  * @param src The integer in host byte order
64  * @return src converted to network byte order
65  */
66 inline uint64_t _htonll(uint64_t src) {
67  static int typ = TYP_INIT;
68  unsigned char c;
69  union {
70  uint64_t ull;
71  unsigned char c[8];
72  } x;
73  if (typ == TYP_INIT) {
74  x.ull = 0x01;
75  typ = (x.c[7] == 0x01ULL) ? TYP_BIGE : TYP_SMLE;
76  }
77  if (typ == TYP_BIGE)
78  return src;
79  x.ull = src;
80  c = x.c[0]; x.c[0] = x.c[7]; x.c[7] = c;
81  c = x.c[1]; x.c[1] = x.c[6]; x.c[6] = c;
82  c = x.c[2]; x.c[2] = x.c[5]; x.c[5] = c;
83  c = x.c[3]; x.c[3] = x.c[4]; x.c[4] = c;
84  return x.ull;
85 }
86 
87 /// Convert 64 bit value to host byte order
88 /**
89  * This method is prefixed to avoid conflicts with operating system level
90  * macros for this functionality.
91  *
92  * TODO: figure out if it would be beneficial to use operating system level
93  * macros for this.
94  *
95  * @param src The integer in network byte order
96  * @return src converted to host byte order
97  */
98 inline uint64_t _ntohll(uint64_t src) {
99  return _htonll(src);
100 }
101 
102 } // net
103 } // lib
104 } // websocketpp
105 
106 #endif // WEBSOCKETPP_COMMON_NETWORK_HPP
#define TYP_SMLE
Definition: network.hpp:52
void handle_accept(connection_ptr con, lib::error_code const &ec)
Handler callback for start_accept.
#define TYP_INIT
Definition: network.hpp:51
#define TYP_BIGE
Definition: network.hpp:53