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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
* This file is part of oFono - Open Source Telephony
*
* Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
*
* Contact: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <glib.h>
#include <arpa/inet.h>
#include "iter.h"
static inline void bcd_to_mccmnc(const uint8_t *bcd, char *mcc, char *mnc)
{
mcc[0] = '0' + (bcd[0] & 0x0F);
mcc[1] = '0' + ((bcd[0] & 0xF0) >> 4);
mcc[2] = '0' + (bcd[1] & 0x0F);
mcc[3] = '\0';
mnc[0] = '0' + (bcd[2] & 0x0F);
mnc[1] = '0' + ((bcd[2] & 0xF0) >> 4);
mnc[2] = (bcd[1] & 0xF0) == 0xF0 ? '\0' : '0' +
(bcd[1] & 0xF0);
mnc[3] = '\0';
}
bool g_isi_sb_iter_init(const void restrict *data, size_t len,
GIsiSubBlockIter *iter, bool longhdr)
{
if (!iter || !data || len == 0)
return false;
iter->start = (uint8_t *)data;
iter->end = iter->start + len;
iter->longhdr = longhdr;
return true;
}
bool g_isi_sb_iter_is_valid(GIsiSubBlockIter *iter)
{
if (!iter || iter->end - iter->start < (iter->longhdr ? 4 : 2))
return false;
if (iter->start + g_isi_sb_iter_get_len(iter) > iter->end)
return false;
return true;
}
int g_isi_sb_iter_get_id(GIsiSubBlockIter *iter)
{
if (iter->longhdr) {
uint16_t *hdr = (uint16_t *)iter->start;
return (int)ntohs(hdr[0]);
}
return iter->start[0];
}
size_t g_isi_sb_iter_get_len(GIsiSubBlockIter *iter)
{
if (iter->longhdr) {
uint16_t *hdr = (uint16_t *)iter->start;
return (size_t)ntohs(hdr[1]);
}
return iter->start[1];
}
bool g_isi_sb_iter_get_byte(GIsiSubBlockIter *iter, uint8_t *byte, int pos)
{
if (pos > (int)g_isi_sb_iter_get_len(iter) || iter->start + pos > iter->end)
return false;
*byte = iter->start[pos];
return true;
}
bool g_isi_sb_iter_get_word(GIsiSubBlockIter *iter, uint16_t *word, int pos)
{
uint16_t val;
if (pos + 1 > (int)g_isi_sb_iter_get_len(iter))
return false;
memcpy(&val, iter->start + pos, sizeof(uint16_t));
*word = ntohs(val);
return true;
}
bool g_isi_sb_iter_get_dword(GIsiSubBlockIter *iter, uint32_t *dword,
int pos)
{
uint32_t val;
if (pos + 3 > (int)g_isi_sb_iter_get_len(iter))
return false;
memcpy(&val, iter->start + pos, sizeof(uint32_t));
*dword = ntohl(val);
return true;
}
bool g_isi_sb_iter_get_oper_code(GIsiSubBlockIter *iter, char *mcc,
char *mnc, int pos)
{
if (pos + 2 > (int)g_isi_sb_iter_get_len(iter))
return false;
bcd_to_mccmnc(iter->start + pos, mcc, mnc);
return true;
}
bool g_isi_sb_iter_get_alpha_tag(GIsiSubBlockIter *iter, char **utf8,
size_t len, int pos)
{
uint8_t *ucs2 = NULL;
if (pos > (int)g_isi_sb_iter_get_len(iter))
return false;
if (!utf8 || len == 0 || pos + len > g_isi_sb_iter_get_len(iter))
return false;
ucs2 = iter->start + pos;
if (ucs2 + len > iter->end)
return false;
*utf8 = g_convert((const char *)ucs2, len, "UTF-8//TRANSLIT", "UCS-2BE",
NULL, NULL, NULL);
return utf8 != NULL;
}
bool g_isi_sb_iter_get_latin_tag(GIsiSubBlockIter *iter, char **latin,
size_t len, int pos)
{
uint8_t *str = NULL;
if (pos > (int)g_isi_sb_iter_get_len(iter))
return false;
if (!latin || len == 0 || pos + len > g_isi_sb_iter_get_len(iter))
return false;
str = iter->start + pos;
if (str + len > iter->end)
return false;
*latin = g_strndup((char *)str, len);
return latin != NULL;
}
bool g_isi_sb_iter_next(GIsiSubBlockIter *iter)
{
uint8_t len = g_isi_sb_iter_get_len(iter);
if (len == 0)
len = iter->longhdr ? 4 : 2;
if (iter->start + len > iter->end)
return false;
iter->start += len;
return true;
}
|
