1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
// Copyright (c) 2014, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Parts of this file are originally copyright (c) 2006-2013, Andrey N. Sabelnikov
#pragma once
#include "levin_base.h"
#include "serializeble_struct_helper.h"
namespace epee
{
namespace levin
{
template<class t_struct>
bool pack_struct_to_levin_message(const t_struct& t, std::string& buff, int command_id)
{
buff.resize(sizeof(levin::bucket_head));
levin::bucket_head& head = *(levin::bucket_head*)(&buff[0]);
head.m_signature = LEVIN_SIGNATURE;
head.m_cb = 0;
head.m_have_to_return_data = true;
head.m_command = command_id;
head.m_return_code = 1;
head.m_reservedA = rand(); //probably some flags in future
head.m_reservedB = rand(); //probably some check summ in future
std::string buff_strg;
if(!StorageNamed::save_struct_as_storage_to_buff_t<t_struct, StorageNamed::DefaultStorageType>(t, buff_strg))
return false;
head.m_cb = buff_strg.size();
buff.append(buff_strg);
return true;
}
bool pack_data_to_levin_message(const std::string& data, std::string& buff, int command_id)
{
buff.resize(sizeof(levin::bucket_head));
levin::bucket_head& head = *(levin::bucket_head*)(&buff[0]);
head.m_signature = LEVIN_SIGNATURE;
head.m_cb = 0;
head.m_have_to_return_data = true;
head.m_command = command_id;
head.m_return_code = 1;
head.m_reservedA = rand(); //probably some flags in future
head.m_reservedB = rand(); //probably some check summ in future
head.m_cb = data.size();
buff.append(data);
return true;
}
bool load_levin_data_from_levin_message(std::string& levin_data, const std::string& buff, int& command)
{
if(buff.size() < sizeof(levin::bucket_head) )
{
LOG_PRINT_L3("size of buff(" << buff.size() << ") is too small, at load_struct_from_levin_message");
return false;
}
levin::bucket_head& head = *(levin::bucket_head*)(&buff[0]);
if(head.m_signature != LEVIN_SIGNATURE)
{
LOG_PRINT_L3("Failed to read signature in levin message, at load_struct_from_levin_message");
return false;
}
if(head.m_cb != buff.size()-sizeof(levin::bucket_head))
{
LOG_PRINT_L3("sizes missmatch, at load_struct_from_levin_message");
return false;
}
//std::string buff_strg;
levin_data.assign(&buff[sizeof(levin::bucket_head)], buff.size()-sizeof(levin::bucket_head));
command = head.m_command;
return true;
}
template<class t_struct>
bool load_struct_from_levin_message(t_struct& t, const std::string& buff, int& command)
{
if(buff.size() < sizeof(levin::bucket_head) )
{
LOG_ERROR("size of buff(" << buff.size() << ") is too small, at load_struct_from_levin_message");
return false;
}
levin::bucket_head& head = *(levin::bucket_head*)(&buff[0]);
if(head.m_signature != LEVIN_SIGNATURE)
{
LOG_ERROR("Failed to read signature in levin message, at load_struct_from_levin_message");
return false;
}
if(head.m_cb != buff.size()-sizeof(levin::bucket_head))
{
LOG_ERROR("sizes missmatch, at load_struct_from_levin_message");
return false;
}
std::string buff_strg;
buff_strg.assign(&buff[sizeof(levin::bucket_head)], buff.size()-sizeof(levin::bucket_head));
if(!StorageNamed::load_struct_from_storage_buff_t<t_struct, StorageNamed::DefaultStorageType>(t, buff_strg))
{
LOG_ERROR("Failed to read storage, at load_struct_from_levin_message");
return false;
}
command = head.m_command;
return true;
}
}
}
|
