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-rw-r--r--src/magnetic/main.c377
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diff --git a/src/magnetic/main.c b/src/magnetic/main.c
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+++ b/src/magnetic/main.c
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+/* main function
+ *
+ * (C) 2021 by Andreas Eversberg <jolly@eversberg.eu>
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ARDUINO
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <signal.h>
+#include <errno.h>
+#include "../libsample/sample.h"
+#include "../libsound/sound.h"
+#include "../libwave/wave.h"
+#include "../liblogging/logging.h"
+#include "../liboptions/options.h"
+#include "../libaaimage/aaimage.h"
+#include <osmocom/cc/misc.h>
+#include "iso7811.h"
+
+int num_kanal = 1;
+static int quit = 0;
+#ifdef HAVE_ALSA
+static void *sound = NULL;
+static int dsp_buffer = 50;
+#endif
+static int dsp_samplerate = 48000;
+static const char *dsp_audiodev = "hw:0,0";
+static const char *wave_file = NULL;
+static int baudrate = 2666;
+static const char *sicherung = "12345";
+
+/* Measurements done in summer 2021 with an original card, applied with iron oxyde. */
+/* Conforms to Track 3 (210 bpi) with 60 bits lead-in, 20 digits data, about 550 bits lead out */
+/* Note that LEAD_OUT here is longer, because the switch must be manually pressed during lead-out. */
+#define CNETZ_LEAD_IN 12 /* number of zero-digits before start sentinel (60 bits) */
+#define CNETZ_LEAD_OUT 150 /* number of zero-digits after LRC sentinel */
+#define CNETZ_SWITCH_ON 27 /* switch closing during lead-out, in digit-duration */
+#define CNETZ_SWITCH_OFF 42 /* switch opening during lead-out, in digit-duration */
+
+static void print_help(const char *arg0)
+{
+ printf("Usage: %s [options] -a hw:0,0 <number> | service\n", arg0);
+ /* - - */
+ printf("General options:\n");
+ printf(" -h --help\n");
+ printf(" This help\n");
+ printf(" --config [~/]<path to config file>\n");
+ printf(" Give a config file to use. If it starts with '~/', path is at home dir.\n");
+ printf(" Each line in config file is one option, '-' or '--' must not be given!\n");
+ logging_print_help();
+ printf(" -a --audio-device hw:<card>,<device>\n");
+ printf(" Input audio from sound card's device number\n");
+ printf(" -s --samplerate <sample rate>\n");
+ printf(" Give audio device sample rate in Hz. (default = %d)\n", dsp_samplerate);
+ printf(" -w --write-wave <filename>\n");
+ printf(" Output sound as wave file\n");
+ printf("\nMagnetic card simulator options:\n");
+ printf(" -B --baud-rate <baud>\n");
+ printf(" Playback baud rate (default = %d)\n", baudrate);
+ printf(" -S --sicherung <security code>\n");
+ printf(" Card's security code for simple authentication (default = '%s')\n", sicherung);
+ printf("\n<number>: Give any valid 7 digit (optionally 8 digit) subscriber number. May\n");
+ printf(" be prefixed with 0160.\n");
+ printf("\n'service': BSA44 service card (to unlock phone after battery replacement)\n");
+}
+
+static void add_options(void)
+{
+ option_add('h', "help", 0);
+ option_add('v', "debug", 1);
+ option_add('a', "audio-device", 1);
+ option_add('s', "samplerate", 1);
+ option_add('w', "write-wave", 1);
+ option_add('B', "baud-rate", 1);
+ option_add('S', "sicherung", 1);
+};
+
+static int handle_options(int short_option, int argi, char **argv)
+{
+ int rc;
+
+ switch (short_option) {
+ case 'h':
+ print_help(argv[0]);
+ return 0;
+ case 'v':
+ rc = parse_logging_opt(argv[argi]);
+ if (rc > 0)
+ return 0;
+ if (rc < 0) {
+ fprintf(stderr, "Failed to parse logging option, please use -h for help.\n");
+ return rc;
+ }
+ break;
+ case 'a':
+ dsp_audiodev = options_strdup(argv[argi]);
+ break;
+ case 's':
+ dsp_samplerate = atof(argv[argi]);
+ break;
+ case 'w':
+ wave_file = options_strdup(argv[argi]);
+ break;
+ case 'B':
+ baudrate = atoi(argv[argi]);
+ break;
+ case 'S':
+ sicherung = options_strdup(argv[argi]);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 1;
+}
+
+static void sighandler(int sigset)
+{
+ if (sigset == SIGHUP)
+ return;
+ if (sigset == SIGPIPE)
+ return;
+
+ printf("Signal received: %d\n", sigset);
+
+ quit = -1;
+}
+
+int main(int argc, char *argv[])
+{
+ const char *number;
+ char string[19];
+ uint8_t data[CNETZ_LEAD_IN + 21 + CNETZ_LEAD_OUT];
+ int length;
+ int rc, argi;
+ int i, j;
+
+ loglevel = LOGL_INFO;
+ logging_init();
+
+ add_options();
+ rc = options_config_file(argc, argv, "~/.osmocom/analog/magnetic.conf", handle_options);
+ if (rc < 0)
+ return 0;
+
+ /* parse command line */
+ argi = options_command_line(argc, argv, handle_options);
+ if (argi <= 0)
+ return argi;
+
+ if (argi >= argc) {
+ fprintf(stderr, "Expecting phone number, use '-h' for help!\n");
+ return 0;
+ } else if (!strcmp(argv[argi], "service")) {
+ bsa44_service(string);
+ } else {
+ number = argv[argi];
+ /* remove prefix, if given */
+ if (strlen(number) >= 10 && !strncmp(number, "0160", 4))
+ number += 4;
+ if (strlen(number) < 7 || strlen(number) > 8) {
+ fprintf(stderr, "Expecting phone number to be 7 or 8 digits, use '-h' for help!\n");
+ return 0;
+ }
+ for (i = 0; number[i]; i++) {
+ if (number[0] < '0' || number[i] > '9') {
+ fprintf(stderr, "Given phone number has invalid digits, use '-h' for help!\n");
+ return 0;
+ }
+ }
+ if (number[0] > '7') {
+inval_number:
+ fprintf(stderr, "Given digits of phone number are out of range for 'C-Netz', use '-h' for help!\n");
+ return 0;
+ }
+ if (strlen(number) == 8) {
+ if ((number[1] - '0') * 10 + (number[2] - '0') > 31)
+ goto inval_number;
+ if (atoi(number + 3) > 65535)
+ goto inval_number;
+ } else {
+ if (atoi(number + 2) > 65535)
+ goto inval_number;
+ }
+ for (i = 0; sicherung[i]; i++) {
+ if (sicherung[0] < '0' || sicherung[i] > '9') {
+ fprintf(stderr, "Given security code has invalid digits, use '-h' for help!\n");
+ return 0;
+ }
+ }
+ if (!sicherung[0] || (sicherung[0] == '0' && sicherung[1] == '0') || atoi(sicherung) > 65535) {
+ fprintf(stderr, "Given security code is out of range, use '-h' for help!\n");
+ return 0;
+ }
+ cnetz_card(string, number, sicherung);
+ }
+
+ length = encode_track(data, string, CNETZ_LEAD_IN, CNETZ_LEAD_OUT);
+ if (length > (int)sizeof(data)) {
+ fprintf(stderr, "Software error: Array too small, PLEASE FIX!\n");
+ return -1;
+ }
+
+ /* alloc space depending on bit rate (length of half-bit: round up to next integer) */
+ int samples_per_halfbit = (dsp_samplerate + (baudrate * 2) - 1) / (baudrate * 2);
+ int total_samples = samples_per_halfbit * 2 * 5 * length;
+ sample_t sample[total_samples], *samples[1], silence[dsp_samplerate], level = 1;
+#ifdef HAVE_ALSA
+ int switch_on_samples = samples_per_halfbit * 2 * 5 * (CNETZ_LEAD_IN + 21 + CNETZ_SWITCH_ON);
+ int switch_off_samples = samples_per_halfbit * 2 * 5 * (CNETZ_LEAD_IN + 21 + CNETZ_SWITCH_OFF);
+ int buffer_size = dsp_samplerate * dsp_buffer / 1000;
+#endif
+
+ /* generate sample */
+ int s, ss = 0;
+ for (i = 0; i < length; i++) {
+ for (j = 0; j < 5; j++) {
+ level = -level;
+ for (s = 0; s < samples_per_halfbit; s++)
+ sample[ss++] = level;
+ if (((data[i] >> j) & 1))
+ level = -level;
+ for (s = 0; s < samples_per_halfbit; s++)
+ sample[ss++] = level;
+ }
+ }
+ memset(silence, 0, sizeof(silence));
+
+ LOGP(DDSP, LOGL_INFO, "Total bits: %d\n", length * 5);
+ LOGP(DDSP, LOGL_INFO, "Samples per bit: %d\n", samples_per_halfbit * 2);
+ LOGP(DDSP, LOGL_INFO, "Total samples: %d (duration: %.3f seconds)\n", total_samples, (double)total_samples / (double)dsp_samplerate);
+
+ if (wave_file) {
+ wave_rec_t wave_rec;
+
+ /* open wave file */
+ rc = wave_create_record(&wave_rec, wave_file, dsp_samplerate, 1, 1.0);
+ if (rc < 0) {
+ LOGP(DRADIO, LOGL_ERROR, "Failed to create WAVE record instance!\n");
+ goto error;
+ }
+ samples[0] = silence;
+ wave_write(&wave_rec, samples, dsp_samplerate / 2);
+ samples[0] = sample;
+ wave_write(&wave_rec, samples, total_samples);
+ samples[0] = silence;
+ wave_write(&wave_rec, samples, dsp_samplerate / 2);
+ wave_destroy_record(&wave_rec);
+ goto done;
+ }
+
+#ifdef HAVE_ALSA
+ /* open audio device */
+ sound = sound_open(SOUND_DIR_PLAY, dsp_audiodev, NULL, NULL, NULL, 1, 0.0, dsp_samplerate, buffer_size, 1.0, 1.0, 0.0, 2.0);
+ if (!sound) {
+ rc = -EIO;
+ LOGP(DRADIO, LOGL_ERROR, "Failed to open sound device!\n");
+ goto error;
+ }
+#else
+ rc = -ENOTSUP;
+ LOGP(DRADIO, LOGL_ERROR, "No sound card support compiled in!\n");
+ goto error;
+#endif
+
+ print_aaimage();
+ printf("String to send: ;%s?\n", string);
+ for (i = 0; i < 5; i++) {
+ if (i < 4)
+ printf("2^%d: ...", i);
+ else
+ printf("Par: ...");
+ for (j = CNETZ_LEAD_IN - 4; j < CNETZ_LEAD_IN + 4 + 21; j++)
+ printf(" %d", (data[j] >> i) & 1);
+ printf(" ...\n");
+ }
+
+ /* catch signals */
+ signal(SIGINT, sighandler);
+ signal(SIGHUP, sighandler);
+ signal(SIGTERM, sighandler);
+ signal(SIGPIPE, sighandler);
+
+#ifdef HAVE_ALSA
+ sound_start(sound);
+
+ int count;
+ while (!quit) {
+ ss = 0;
+ while (!quit) {
+ usleep(1000);
+ count = sound_get_tosend(sound, buffer_size);
+ if (count <= 0)
+ continue;
+ samples[0] = silence + ss;
+ ss += count;
+ if (ss > dsp_samplerate) {
+ count -= ss - dsp_samplerate;
+ ss = dsp_samplerate;
+ }
+ sound_write(sound, samples, NULL, count, NULL, NULL, 1);
+ if (ss == dsp_samplerate)
+ break;
+ }
+ printf("\033[0;32m -> \033[1;31mTX\033[0;32m <-\033[0;39m\r"); fflush(stdout);
+ ss = 0;
+ while (!quit) {
+ usleep(1000);
+ count = sound_get_tosend(sound, buffer_size);
+ if (count <= 0)
+ continue;
+ if ((ss >= 0 && ss < count) || (ss - switch_off_samples >= 0 && ss - switch_off_samples < count)) {
+ printf("\033[0;32m -> \033[1;31mTX\033[0;32m <- \033[0;39m\r"); fflush(stdout);
+ }
+ if (ss - switch_on_samples >= 0 && ss - switch_on_samples < count) {
+ printf("\033[0;32m -> \033[1;31mTX\033[0;32m <- -> \033[1;33mCLICK\033[0;32m <-\033[0;39m\r"); fflush(stdout);
+ }
+ samples[0] = sample + ss;
+ ss += count;
+ if (ss > total_samples) {
+ count -= ss - total_samples;
+ ss = total_samples;
+ }
+ sound_write(sound, samples, NULL, count, NULL, NULL, 1);
+ if (ss == total_samples)
+ break;
+ }
+ printf(" \r"); fflush(stdout);
+ }
+#endif
+
+ /* reset signals */
+ signal(SIGINT, SIG_DFL);
+ signal(SIGHUP, SIG_DFL);
+ signal(SIGTERM, SIG_DFL);
+ signal(SIGPIPE, SIG_DFL);
+
+error:
+#ifdef HAVE_ALSA
+ if (sound)
+ sound_close(sound);
+#endif
+
+done:
+ options_free();
+
+ return 0;
+}
+
+void osmo_cc_set_log_cat(int __attribute__((unused)) cc_log_cat) {}
+
+void display_measurements_add(void);
+void *display_measurements_update(void);
+void *get_sender_by_empfangsfrequenz(void);
+void display_measurements_add(void) {}
+void *display_measurements_update(void) { return NULL; }
+void *get_sender_by_empfangsfrequenz(void) { return NULL; }
+
+#endif /* ARDUINO */
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