forked from cellular-infrastructure/osmocom-analog
373 lines
11 KiB
C
373 lines
11 KiB
C
/* POCSAG (Radio-Paging Code #1) main
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*
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* (C) 2021 by Andreas Eversberg <jolly@eversberg.eu>
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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 3 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "../libsample/sample.h"
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#include "../libdebug/debug.h"
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#include "../libmobile/call.h"
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#include "../libmobile/main_mobile.h"
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#include "../liboptions/options.h"
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#include "../libfm/fm.h"
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#include "../anetz/besetztton.h"
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#include "pocsag.h"
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#include "dsp.h"
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#define MSG_SEND "/tmp/pocsag_msg_send"
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#define MSG_RECEIVED "/tmp/pocsag_msg_received"
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static int msg_send_fd = -1;
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static int tx = 0; /* we transmit */
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static int rx = 0; /* we receive */
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static int baudrate = 1200;
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static int baudrate_given = 0;
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static double deviation = 4500;
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static int deviation_given = 0;
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static double polarity = -1;
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static int polarity_given = 0;
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static enum pocsag_function function = POCSAG_FUNCTION_NUMERIC;
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static const char *message = "1234";
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static enum pocsag_language language = LANGUAGE_DEFAULT;
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static uint32_t scan_from = 0;
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static uint32_t scan_to = 0;
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void print_help(const char *arg0)
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{
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main_mobile_print_help(arg0, "-k 466.230 | -k list");
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/* - - */
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printf(" -T --tx\n");
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printf(" Transmit Eurosignal on given channel, to page a receiver. (default)\n");
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printf(" -R --rx\n");
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printf(" Receive Eurosignal on given channel, so we are the receiver.\n");
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printf(" If none of the options -T nor -R is given, only transmitter is enabled.\n");
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printf(" -B --baud-rate 512 | 1200 | 2400\n");
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printf(" Choose baud rate of transmitter.\n");
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printf(" -D --deviation wide | 4.5 | narrow | 2.5 | <other KHz>\n");
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printf(" Choose deviation of FFSK signal (default %.0f KHz).\n", deviation / 1000.0);
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printf(" -P --polarity -1 | nagative | 1 | positive\n");
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printf(" Choose polarity of FFSK signal. 'negative' means that a binary 0 uses\n");
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printf(" positive and a binary 1 negative deviation. (default %s KHz).\n", (polarity < 0) ? "negative" : "positive");
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printf(" -F --function 0..3 | A..D | numeric | beep1 | beep2 | alphanumeric\n");
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printf(" Choose default function when 7 digit only number is dialed.\n");
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printf(" (default %d = %s)\n", function, pocsag_function_name[function]);
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printf(" -M --message \"...\"\n");
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printf(" Send this message, if no caller ID was given or of built-in console\n");
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printf(" is used. (default \"%s\").\n", message);
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printf(" -L --language\n");
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printf(" Translate German spcial characters from/to UTF-8.\n");
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printf(" -S --scan <from> <to>\n");
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printf(" Scan through given IDs once (no repetition). This can be useful to find\n");
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printf(" the RIC of a vintage pager. Note that scanning all RICs from 0 through\n");
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printf(" 2097151 would take about 16.5 Hours at 1200 Baud and known sub RIC.\n");
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printf(" Use -F to select function of the pager. Short messages with 5 numeric\n");
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printf(" or 2 alphanumeric characters are sent without increase in scanning\n");
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printf(" time. The upper 5 digits of the RIC are sent as message, if numeric\n");
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printf(" function was selected. The upper 3 digits of the RIC are sent as\n");
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printf(" message (2 digits hexadecimal), if alphanumeric function was selected.\n");
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printf("\n");
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printf("File: %s\n", MSG_SEND);
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printf(" Write \"<ric>,0,message\" to it to send a numerical message.\n");
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printf(" Write \"<ric>,3,message\" to it to send an alphanumerical message.\n");
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printf("File: %s\n", MSG_RECEIVED);
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printf(" Read from it to see received messages.\n");
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main_mobile_print_station_id();
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main_mobile_print_hotkeys();
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}
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static void add_options(void)
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{
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main_mobile_add_options();
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option_add('T', "tx", 0);
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option_add('R', "rx", 0);
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option_add('B', "baud-rate", 1);
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option_add('D', "deviation", 1);
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option_add('F', "function", 1);
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option_add('P', "polarity", 1);
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option_add('M', "message", 1);
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option_add('L', "language", 0);
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option_add('S', "scan", 2);
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}
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static int handle_options(int short_option, int argi, char **argv)
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{
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int rc;
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switch (short_option) {
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case 'T':
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tx = 1;
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break;
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case 'R':
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rx = 1;
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break;
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case 'B':
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baudrate = atoi(argv[argi]);
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if (baudrate != 512 && baudrate != 1200 && baudrate != 2400) {
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fprintf(stderr, "Given baud-rate is not 512, 1200 nor 2400, use '-h' for help.\n");
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return -EINVAL;
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}
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baudrate_given = 1;
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break;
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case 'D':
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if (argv[argi][0] == 'n' || argv[argi][0] == 'N')
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deviation = 2500.0;
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else if (argv[argi][0] == 'w' || argv[argi][0] == 'W')
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deviation = 4500.0;
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else
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deviation = atof(argv[argi]) * 1000.0;
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if (deviation < 1000.0) {
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fprintf(stderr, "Given deviation is too low, use higher deviation.\n");
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return -EINVAL;
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}
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if (deviation > 10000.0) {
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fprintf(stderr, "Given deviation is too high, use lower deviation.\n");
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return -EINVAL;
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}
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deviation_given = 1;
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break;
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case 'P':
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if (argv[argi][0] == 'n' || argv[argi][0] == 'N')
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polarity = -1.0;
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else if (argv[argi][0] == 'p' || argv[argi][0] == 'P')
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polarity = 1.0;
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else if (atoi(argv[argi]) == -1)
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polarity = -1.0;
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else if (atoi(argv[argi]) == 1)
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polarity = 1.0;
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else {
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fprintf(stderr, "Given polarity is not positive nor negative, use '-h' for help.\n");
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return -EINVAL;
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}
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polarity_given = 1;
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break;
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case 'F':
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rc = pocsag_function_name2value(argv[argi]);
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if (rc < 0) {
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fprintf(stderr, "Given function is invalid, use '-h' for help.\n");
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return rc;
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}
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function = rc;
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break;
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case 'M':
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message = options_strdup(argv[argi++]);
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break;
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case 'L':
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language = LANGUAGE_GERMAN;
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break;
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case 'S':
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scan_from = atoi(argv[argi++]);
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if (scan_from > 2097151) {
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fprintf(stderr, "Given RIC to scan from is out of range!\n");
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return -EINVAL;
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}
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scan_to = atoi(argv[argi++]) + 1;
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if (scan_to > 2097151 + 1) {
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fprintf(stderr, "Given RIC to scan to is out of range!\n");
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return -EINVAL;
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}
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break;
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default:
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return main_mobile_handle_options(short_option, argi, argv);
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}
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return 1;
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}
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static void myhandler(void)
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{
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static char buffer[256];
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static int pos = 0, rc, i;
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int space = sizeof(buffer) - pos;
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rc = read(msg_send_fd, buffer + pos, space);
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if (rc > 0) {
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pos += rc;
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if (pos == space) {
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fprintf(stderr, "Message buffer overflow!\n");
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pos = 0;
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}
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/* check for end of line */
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for (i = 0; i < pos; i++) {
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if (buffer[i] == '\r' || buffer[i] == '\n')
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break;
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}
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/* send msg */
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if (i < pos) {
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buffer[i] = '\0';
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pos = 0;
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if (tx)
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pocsag_msg_send(language, buffer);
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else
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PDEBUG(DPOCSAG, DEBUG_ERROR, "Failed to send message, transmitter is not enabled!\n");
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}
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}
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}
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int msg_receive(const char *text)
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{
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FILE *fp;
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fp = fopen(MSG_RECEIVED, "a");
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if (!fp) {
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fprintf(stderr, "Failed to open MSG receive file '%s'!\n", MSG_RECEIVED);
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return -1;
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}
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fprintf(fp, "%s\n", text);
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fclose(fp);
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return 0;
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}
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static const struct number_lengths number_lengths[] = {
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{ 7, "RIC with default function" },
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{ 8, "RIC with function (append 0..3)" },
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{ 0, NULL }
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};
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int main(int argc, char *argv[])
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{
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int rc, argi;
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const char *station_id = "";
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int i;
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double frequency;
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/* pocsag does not use emphasis, so disable it */
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uses_emphasis = 0;
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/* init common tones */
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init_besetzton();
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/* init mobile interface */
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main_mobile_init("0123456789", number_lengths, NULL, pocsag_number_valid);
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/* handle options / config file */
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add_options();
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rc = options_config_file(argc, argv, "~/.osmocom/analog/pocsag.conf", handle_options);
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if (rc < 0)
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return 0;
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argi = options_command_line(argc, argv, handle_options);
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if (argi <= 0)
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return argi;
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if (argi < argc) {
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station_id = argv[argi];
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rc = main_mobile_number_ask(station_id, "station ID (RIC)");
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if (rc)
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return rc;
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}
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if (!num_kanal) {
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printf("No channel is specified, Use '-k list' to get a list of all channels.\n\n");
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print_help(argv[0]);
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return 0;
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}
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if (!strcasecmp(kanal[0], "list")) {
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pocsag_list_channels();
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goto fail;
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}
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if (use_sdr) {
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/* set device */
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for (i = 0; i < num_kanal; i++)
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dsp_device[i] = "sdr";
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num_device = num_kanal;
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}
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if (num_kanal == 1 && num_device == 0)
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num_device = 1; /* use default */
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if (num_kanal != num_device) {
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fprintf(stderr, "You need to specify as many sound devices as you have channels.\n");
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goto fail;
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}
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/* TX is default */
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if (!tx && !rx)
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tx = 1;
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/* TX & RX if loopback */
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if (loopback)
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tx = rx = 1;
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/* no TX, no scanning */
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if (!tx && scan_to > scan_from) {
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fprintf(stderr, "You need to enable TX, in order to scan.\n");
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goto fail;
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}
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/* create pipe for message sendy */
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unlink(MSG_SEND);
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rc = mkfifo(MSG_SEND, 0666);
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if (rc < 0) {
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fprintf(stderr, "Failed to create mwaaage send FIFO '%s'!\n", MSG_SEND);
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goto fail;
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} else {
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msg_send_fd = open(MSG_SEND, O_RDONLY | O_NONBLOCK);
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if (msg_send_fd < 0) {
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fprintf(stderr, "Failed to open mwaaage send FIFO! '%s'\n", MSG_SEND);
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goto fail;
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}
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}
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/* inits */
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fm_init(fast_math);
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pocsag_init();
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/* create transceiver instance */
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for (i = 0; i < num_kanal; i++) {
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frequency = pocsag_channel2freq(kanal[i], (deviation_given) ? NULL : &deviation, (polarity_given) ? NULL : &polarity, (baudrate_given) ? NULL : &baudrate);
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if (frequency == 0.0) {
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printf("Invalid channel '%s', Use '-k list' to get a list of all channels.\n\n", kanal[i]);
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goto fail;
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}
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rc = pocsag_create(kanal[i], frequency, dsp_device[i], use_sdr, dsp_samplerate, rx_gain, tx_gain, tx, rx, language, baudrate, deviation, polarity, function, message, scan_from, scan_to, write_rx_wave, write_tx_wave, read_rx_wave, read_tx_wave, loopback);
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if (rc < 0) {
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fprintf(stderr, "Failed to create \"Sender\" instance. Quitting!\n");
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goto fail;
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}
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printf("Base station ready, please tune transmitter (or receiver) to %.4f MHz\n", frequency / 1e6);
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}
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main_mobile_loop("pocsag", &quit, myhandler, station_id);
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fail:
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/* pipe */
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if (msg_send_fd > 0)
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close(msg_send_fd);
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unlink(MSG_SEND);
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/* destroy transceiver instance */
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while(sender_head)
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pocsag_destroy(sender_head);
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/* exits */
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fm_exit();
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pocsag_exit();
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options_free();
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return 0;
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}
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