mirror of https://gerrit.osmocom.org/libosmocore
155 lines
3.1 KiB
C
155 lines
3.1 KiB
C
/*! \file osmo-arfcn.c
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* Utility program for ARFCN / frequency calculations. */
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/*
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* (C) 2011 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <stdio.h>
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#include <getopt.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <osmocom/gsm/gsm_utils.h>
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enum program_mode {
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MODE_NONE,
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MODE_A2F,
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MODE_F2A,
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};
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static int arfcn2freq(int arfcn)
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{
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uint16_t freq10u, freq10d;
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if (arfcn < 0 || arfcn > 0xffff) {
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fprintf(stderr, "Invalid ARFCN %d\n", arfcn);
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return -EINVAL;
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}
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freq10u = gsm_arfcn2freq10(arfcn, 1);
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freq10d = gsm_arfcn2freq10(arfcn, 0);
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if (freq10u == 0xffff || freq10d == 0xffff) {
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fprintf(stderr, "Error during conversion of ARFCN %d\n",
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arfcn);
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return -EINVAL;
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}
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printf("ARFCN %4d: Uplink %4u.%1u MHz / Downlink %4u.%1u MHz\n",
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arfcn & ~ARFCN_FLAG_MASK,
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freq10u/10, freq10u%10, freq10d/10, freq10d%10);
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return 0;
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}
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static int freq2arfcn(int freq10, int uplink)
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{
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uint16_t arfcn;
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enum gsm_band band;
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if (uplink != 0 && uplink != 1) {
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fprintf(stderr, "Need to specify uplink or downlink\n");
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return -EINVAL;
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}
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arfcn = gsm_freq102arfcn(freq10, uplink);
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if (arfcn == 0xffff) {
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fprintf(stderr, "Unable to find matching ARFCN\n");
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return -EINVAL;
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}
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if (gsm_arfcn2band_rc(arfcn, &band) < 0) {
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fprintf(stderr, "ARFCN contains no valid band\n");
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return -EINVAL;
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}
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printf("%s: ARFCN %4d\n",
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gsm_band_name(band),
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arfcn & ~ARFCN_FLAG_MASK);
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return 0;
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}
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static void help(const char *progname)
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{
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printf("Usage: %s [-h] [-p] [-a arfcn] [-f freq] [-u|-d]\n",
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progname);
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}
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int main(int argc, char **argv)
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{
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int arfcn, freq, pcs = 0, uplink = -1;
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int opt;
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char *param;
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enum program_mode mode = MODE_NONE;
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while ((opt = getopt(argc, argv, "pa:f:udh")) != -1) {
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switch (opt) {
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case 'p':
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pcs = 1;
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break;
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case 'a':
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mode = MODE_A2F;
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param = optarg;
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break;
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case 'f':
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mode = MODE_F2A;
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param = optarg;
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break;
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case 'u':
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uplink = 1;
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break;
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case 'd':
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uplink = 0;
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break;
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case 'h':
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help(argv[0]);
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exit(0);
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break;
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default:
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break;
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}
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}
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if (argc > optind) {
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fprintf(stderr, "Unsupported positional arguments in command line\n");
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exit(2);
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}
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switch (mode) {
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case MODE_NONE:
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help(argv[0]);
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exit(2);
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break;
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case MODE_A2F:
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arfcn = atoi(param);
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if (pcs)
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arfcn |= ARFCN_PCS;
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arfcn2freq(arfcn);
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break;
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case MODE_F2A:
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freq = (int)(atof(param) * 10.0f);
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freq2arfcn(freq, uplink);
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break;
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}
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exit(0);
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}
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