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
|
/*
* util.c -- Utilities.
*
* This file is donated to the Tox Project.
* Copyright 2013 plutooo
*
* Copyright (C) 2013 Tox project All Rights Reserved.
*
* This file is part of Tox.
*
* Tox is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Tox 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Tox. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <time.h>
/* for CLIENT_ID_SIZE */
#include "DHT.h"
#include "util.h"
/* don't call into system billions of times for no reason */
static uint64_t unix_time_value;
static uint64_t unix_base_time_value;
void unix_time_update()
{
if (unix_base_time_value == 0)
unix_base_time_value = ((uint64_t)time(NULL) - (current_time_monotonic() / 1000ULL));
unix_time_value = (current_time_monotonic() / 1000ULL) + unix_base_time_value;
}
uint64_t unix_time()
{
return unix_time_value;
}
int is_timeout(uint64_t timestamp, uint64_t timeout)
{
return timestamp + timeout <= unix_time();
}
/* id functions */
bool id_equal(const uint8_t *dest, const uint8_t *src)
{
return memcmp(dest, src, CLIENT_ID_SIZE) == 0;
}
uint32_t id_copy(uint8_t *dest, const uint8_t *src)
{
memcpy(dest, src, CLIENT_ID_SIZE);
return CLIENT_ID_SIZE;
}
void host_to_net(uint8_t *num, uint16_t numbytes)
{
#ifndef WORDS_BIGENDIAN
uint32_t i;
uint8_t buff[numbytes];
for (i = 0; i < numbytes; ++i) {
buff[i] = num[numbytes - i - 1];
}
memcpy(num, buff, numbytes);
#endif
return;
}
/* state load/save */
int load_state(load_state_callback_func load_state_callback, void *outer,
const uint8_t *data, uint32_t length, uint16_t cookie_inner)
{
if (!load_state_callback || !data) {
#ifdef DEBUG
fprintf(stderr, "load_state() called with invalid args.\n");
#endif
return -1;
}
uint16_t type;
uint32_t length_sub, cookie_type;
uint32_t size_head = sizeof(uint32_t) * 2;
while (length >= size_head) {
memcpy(&length_sub, data, sizeof(length_sub));
memcpy(&cookie_type, data + sizeof(length_sub), sizeof(cookie_type));
data += size_head;
length -= size_head;
if (length < length_sub) {
/* file truncated */
#ifdef DEBUG
fprintf(stderr, "state file too short: %u < %u\n", length, length_sub);
#endif
return -1;
}
if ((cookie_type >> 16) != cookie_inner) {
/* something is not matching up in a bad way, give up */
#ifdef DEBUG
fprintf(stderr, "state file garbeled: %04hx != %04hx\n", (cookie_type >> 16), cookie_inner);
#endif
return -1;
}
type = cookie_type & 0xFFFF;
if (-1 == load_state_callback(outer, data, length_sub, type))
return -1;
data += length_sub;
length -= length_sub;
}
return length == 0 ? 0 : -1;
};
|
