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
|
/*! \file osmo-arfcn.c
* Utility program for ARFCN / frequency calculations. */
/*
* (C) 2011 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <stdio.h>
#include <getopt.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <osmocom/gsm/gsm_utils.h>
enum program_mode {
MODE_NONE,
MODE_A2F,
MODE_F2A,
};
static int arfcn2freq(int arfcn)
{
uint16_t freq10u, freq10d;
if (arfcn < 0 || arfcn > 0xffff) {
fprintf(stderr, "Invalid ARFCN %d\n", arfcn);
return -EINVAL;
}
freq10u = gsm_arfcn2freq10(arfcn, 1);
freq10d = gsm_arfcn2freq10(arfcn, 0);
if (freq10u == 0xffff || freq10d == 0xffff) {
fprintf(stderr, "Error during conversion of ARFCN %d\n",
arfcn);
return -EINVAL;
}
printf("ARFCN %4d: Uplink %4u.%1u MHz / Downlink %4u.%1u MHz\n",
arfcn & ~ARFCN_FLAG_MASK,
freq10u/10, freq10u%10, freq10d/10, freq10d%10);
return 0;
}
static int freq2arfcn(int freq10, int uplink)
{
uint16_t arfcn;
enum gsm_band band;
if (uplink != 0 && uplink != 1) {
fprintf(stderr, "Need to specify uplink or downlink\n");
return -EINVAL;
}
arfcn = gsm_freq102arfcn(freq10, uplink);
if (arfcn == 0xffff) {
fprintf(stderr, "Unable to find matching ARFCN\n");
return -EINVAL;
}
if (gsm_arfcn2band_rc(arfcn, &band) < 0) {
fprintf(stderr, "ARFCN contains no valid band\n");
return -EINVAL;
}
printf("%s: ARFCN %4d\n",
gsm_band_name(band),
arfcn & ~ARFCN_FLAG_MASK);
return 0;
}
static void help(const char *progname)
{
printf("Usage: %s [-h] [-p] [-a arfcn] [-f freq] [-u|-d]\n",
progname);
}
int main(int argc, char **argv)
{
int arfcn, freq, pcs = 0, uplink = -1;
int opt;
char *param;
enum program_mode mode = MODE_NONE;
while ((opt = getopt(argc, argv, "pa:f:ud")) != -1) {
switch (opt) {
case 'p':
pcs = 1;
break;
case 'a':
mode = MODE_A2F;
param = optarg;
break;
case 'f':
mode = MODE_F2A;
param = optarg;
break;
case 'u':
uplink = 1;
break;
case 'd':
uplink = 0;
break;
case 'h':
help(argv[0]);
exit(0);
break;
default:
break;
}
}
switch (mode) {
case MODE_NONE:
help(argv[0]);
exit(2);
break;
case MODE_A2F:
arfcn = atoi(param);
if (pcs)
arfcn |= ARFCN_PCS;
arfcn2freq(arfcn);
break;
case MODE_F2A:
freq = (int)(atof(param) * 10.0f);
freq2arfcn(freq, uplink);
break;
}
exit(0);
}
|