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config.c
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config.c
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//
// This file is part of Dire Wolf, an amateur radio packet TNC.
//
// Copyright (C) 2011, 2012, 2013, 2014, 2015 John Langner, WB2OSZ
//
// 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, see <http://www.gnu.org/licenses/>.
//
// #define DEBUG 1
/*------------------------------------------------------------------
*
* Module: config.c
*
* Purpose: Read configuration information from a file.
*
* Description: This started out as a simple little application with a few
* command line options. Due to creeping featurism, it's now
* time to add a configuration file to specify options.
*
*---------------------------------------------------------------*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#if __WIN32__
#include "pthreads/pthread.h"
#else
#include <pthread.h>
#endif
#include "ax25_pad.h"
#include "textcolor.h"
#include "audio.h"
#include "digipeater.h"
#include "config.h"
#include "aprs_tt.h"
#include "igate.h"
#include "latlong.h"
#include "symbols.h"
#include "xmit.h"
// geotranz
#include "utm.h"
#include "mgrs.h"
#include "usng.h"
#include "error_string.h"
#define D2R(d) ((d) * M_PI / 180.)
#define R2D(r) ((r) * 180. / M_PI)
//#include "tq.h"
/*
* Conversions from various units to meters.
* There is some disagreement about the exact values for some of these.
* Close enough for our purposes.
* Parsec, light year, and angstrom are probably not useful.
*/
static const struct units_s {
char *name;
float meters;
} units[] = {
{ "barleycorn", 0.008466667 },
{ "inch", 0.0254 },
{ "in", 0.0254 },
{ "hand", 0.1016 },
{ "shaku", 0.3030 },
{ "foot", 0.304801 },
{ "ft", 0.304801 },
{ "cubit", 0.4572 },
{ "megalithicyard", 0.8296 },
{ "my", 0.8296 },
{ "yard", 0.914402 },
{ "yd", 0.914402 },
{ "m", 1. },
{ "meter", 1. },
{ "metre", 1. },
{ "ell", 1.143 },
{ "ken", 1.818 },
{ "hiro", 1.818 },
{ "fathom", 1.8288 },
{ "fath", 1.8288 },
{ "toise", 1.949 },
{ "jo", 3.030 },
{ "twain", 3.6576074 },
{ "rod", 5.0292 },
{ "rd", 5.0292 },
{ "perch", 5.0292 },
{ "pole", 5.0292 },
{ "rope", 6.096 },
{ "dekameter", 10. },
{ "dekametre", 10. },
{ "dam", 10. },
{ "chain", 20.1168 },
{ "ch", 20.1168 },
{ "actus", 35.47872 },
{ "arpent", 58.471 },
{ "hectometer", 100. },
{ "hectometre", 100. },
{ "hm", 100. },
{ "cho", 109.1 },
{ "furlong", 201.168 },
{ "fur", 201.168 },
{ "kilometer", 1000. },
{ "kilometre", 1000. },
{ "km", 1000. },
{ "mile", 1609.344 },
{ "mi", 1609.344 },
{ "ri", 3927. },
{ "league", 4828.032 },
{ "lea", 4828.032 } };
#define NUM_UNITS (sizeof(units) / sizeof(struct units_s))
static int beacon_options(char *cmd, struct beacon_s *b, int line, struct audio_s *p_audio_config);
/* Do we have a string of all digits? */
static int alldigits(char *p)
{
if (p == NULL) return (0);
if (strlen(p) == 0) return (0);
while (*p != '\0') {
if ( ! isdigit(*p)) return (0);
p++;
}
return (1);
}
/* Do we have a string of all letters or + or - ? */
static int alllettersorpm(char *p)
{
if (p == NULL) return (0);
if (strlen(p) == 0) return (0);
while (*p != '\0') {
if ( ! isalpha(*p) && *p != '+' && *p != '-') return (0);
p++;
}
return (1);
}
/*------------------------------------------------------------------
*
* Name: parse_ll
*
* Purpose: Parse latitude or longitude from configuration file.
*
* Inputs: str - String like [-]deg[^min][hemisphere]
*
* which - LAT or LON for error checking and message.
*
* line - Line number for use in error message.
*
* Returns: Coordinate in signed degrees.
*
*----------------------------------------------------------------*/
/* Acceptable symbols to separate degrees & minutes. */
/* Degree symbol is not in ASCII so documentation says to use "^" instead. */
/* Some wise guy will try to use degree symbol. */
#define DEG1 '^'
#define DEG2 0xb0 /* ISO Latin1 */
#define DEG3 0xf8 /* Microsoft code page 437 */
// TODO: recognize UTF-8 degree symbol.
enum parse_ll_which_e { LAT, LON };
static double parse_ll (char *str, enum parse_ll_which_e which, int line)
{
char stemp[40];
int sign;
double degrees, minutes;
char *endptr;
char hemi;
int limit;
unsigned char sep;
/*
* Remove any negative sign.
*/
strcpy (stemp, str);
sign = +1;
if (stemp[0] == '-') {
sign = -1;
stemp[0] = ' ';
}
/*
* Process any hemisphere on the end.
*/
if (strlen(stemp) >= 2) {
endptr = stemp + strlen(stemp) - 1;
if (isalpha(*endptr)) {
hemi = *endptr;
*endptr = '\0';
if (islower(hemi)) {
hemi = toupper(hemi);
}
if (hemi == 'W' || hemi == 'S') {
sign = -sign;
}
if (which == LAT) {
if (hemi != 'N' && hemi != 'S') {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Latitude hemisphere in \"%s\" is not N or S.\n", line, str);
}
}
else {
if (hemi != 'E' && hemi != 'W') {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Longitude hemisphere in \"%s\" is not E or W.\n", line, str);
}
}
}
}
/*
* Parse the degrees part.
*/
degrees = strtod (stemp, &endptr);
/*
* Is there a minutes part?
*/
sep = *endptr;
if (sep != '\0') {
if (sep == DEG1 || sep == DEG2 || sep == DEG3) {
minutes = strtod (endptr+1, &endptr);
if (*endptr != '\0') {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Unexpected character '%c' in location \"%s\"\n", line, sep, str);
}
if (minutes >= 60.0) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Number of minutes in \"%s\" is >= 60.\n", line, str);
}
degrees += minutes / 60.0;
}
else {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Unexpected character '%c' in location \"%s\"\n", line, sep, str);
}
}
degrees = degrees * sign;
limit = which == LAT ? 90 : 180;
if (degrees < -limit || degrees > limit) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Number of degrees in \"%s\" is out of range for %s\n", line, str,
which == LAT ? "latitude" : "longitude");
}
//dw_printf ("%s = %f\n", str, degrees);
return (degrees);
}
/*------------------------------------------------------------------
*
* Name: parse_utm_zone
*
* Purpose: Parse UTM zone from configuration file.
*
* Inputs: szone - String like [-]number[letter]
*
* Output: hemi - Hemisphere, 'N' or 'S'.
*
* Returns: Zone as number.
* Type is long because Convert_UTM_To_Geodetic expects that.
*
* Errors: Prints message and return 0.
*
* Description:
* It seems there are multiple conventions for specifying the UTM hemisphere.
*
* - MGRS latitude band. North if missing or >= 'N'.
* - Negative zone for south.
* - Separate North or South.
*
* I'm using the first alternatve.
* GEOTRANS uses the third.
* We will also recognize the second one but I'm not sure if I want to document it.
*
*----------------------------------------------------------------*/
long parse_utm_zone (char *szone, char *hemi)
{
long lzone;
char *zlet;
*hemi = 'N'; /* default */
lzone = strtol(szone, &zlet, 10);
if (*zlet == '\0') {
/* Number is not followed by letter something else. */
/* Allow negative number to mean south. */
if (lzone < 0) {
*hemi = 'S';
lzone = (- lzone);
}
}
else {
if (islower (*zlet)) {
*zlet = toupper(*zlet);
}
if (strchr ("CDEFGHJKLMNPQRSTUVWX", *zlet) != NULL) {
if (*zlet < 'N') {
*hemi = 'S';
}
}
else {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Latitudinal band in \"%s\" must be one of CDEFGHJKLMNPQRSTUVWX.\n", szone);
*hemi = '?';
}
}
if (lzone < 1 || lzone > 60) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("UTM Zone number %ld must be in range of 1 to 60.\n", lzone);
}
return (lzone);
}
#if 0
main ()
{
parse_ll ("12.5", LAT);
parse_ll ("12.5N", LAT);
parse_ll ("12.5E", LAT); // error
parse_ll ("-12.5", LAT);
parse_ll ("12.5S", LAT);
parse_ll ("12.5W", LAT); // error
parse_ll ("12.5", LON);
parse_ll ("12.5E", LON);
parse_ll ("12.5N", LON); // error
parse_ll ("-12.5", LON);
parse_ll ("12.5W", LON);
parse_ll ("12.5S", LON); // error
parse_ll ("12^30", LAT);
parse_ll ("12°30", LAT);
parse_ll ("91", LAT); // out of range
parse_ll ("91", LON);
parse_ll ("181", LON); // out of range
parse_ll ("12&5", LAT); // bad character
}
#endif
/*------------------------------------------------------------------
*
* Name: parse_interval
*
* Purpose: Parse time interval from configuration file.
*
* Inputs: str - String like 10 or 9:30
*
* line - Line number for use in error message.
*
* Returns: Number of seconds.
*
* Description: This is used by the BEACON configuration items
* for initial delay or time between beacons.
*
* The format is either minutes or minutes:seconds.
*
*----------------------------------------------------------------*/
static int parse_interval (char *str, int line)
{
char *p;
int sec;
int nc = 0;
int bad = 0;
for (p = str; *p != '\0'; p++) {
if (*p == ':') nc++;
else if ( ! isdigit(*p)) bad++;
}
if (bad > 0 || nc > 1) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Config file, line %d: Time interval must be of the form minutes or minutes:seconds.\n", line);
}
p = strchr (str, ':');
if (p != NULL) {
sec = atoi(str) * 60 + atoi(p+1);
}
else {
sec = atoi(str) * 60;
}
return (sec);
} /* end parse_interval */
/*-------------------------------------------------------------------
*
* Name: config_init
*
* Purpose: Read configuration file when application starts up.
*
* Inputs: fname - Name of configuration file.
*
* Outputs: p_audio_config - Radio channel parameters stored here.
*
* p_digi_config - Digipeater configuration stored here.
*
* p_tt_config - APRStt stuff.
*
* p_igate_config - Internet Gateway.
*
* p_misc_config - Everything else. This wasn't thought out well.
*
* Description: Apply default values for various parameters then read the
* the configuration file which can override those values.
*
* Errors: For invalid input, display line number and message on stdout (not stderr).
* In many cases this will result in keeping the default rather than aborting.
*
* Bugs: Very simple-minded parsing.
* Not much error checking. (e.g. atoi() will return 0 for invalid string.)
* Not very forgiving about sloppy input.
*
*--------------------------------------------------------------------*/
void config_init (char *fname, struct audio_s *p_audio_config,
struct digi_config_s *p_digi_config,
struct tt_config_s *p_tt_config,
struct igate_config_s *p_igate_config,
struct misc_config_s *p_misc_config)
{
FILE *fp;
char stuff[256];
//char *p;
//int c, p;
//int err;
int line;
int channel;
int adevice;
#if DEBUG
text_color_set(DW_COLOR_DEBUG);
dw_printf ("config_init ( %s )\n", fname);
#endif
/*
* First apply defaults.
*/
memset (p_audio_config, 0, sizeof(struct audio_s));
/* First audio device is always available with defaults. */
/* Others must be explicitly defined before use. */
for (adevice=0; adevice<MAX_ADEVS; adevice++) {
strcpy (p_audio_config->adev[adevice].adevice_in, DEFAULT_ADEVICE);
strcpy (p_audio_config->adev[adevice].adevice_out, DEFAULT_ADEVICE);
p_audio_config->adev[adevice].defined = 0;
p_audio_config->adev[adevice].num_channels = DEFAULT_NUM_CHANNELS; /* -2 stereo */
p_audio_config->adev[adevice].samples_per_sec = DEFAULT_SAMPLES_PER_SEC; /* -r option */
p_audio_config->adev[adevice].bits_per_sample = DEFAULT_BITS_PER_SAMPLE; /* -8 option for 8 instead of 16 bits */
}
p_audio_config->adev[0].defined = 1;
for (channel=0; channel<MAX_CHANS; channel++) {
int ot;
p_audio_config->achan[channel].valid = 0; /* One or both channels will be */
/* set to valid when corresponding */
/* audio device is defined. */
p_audio_config->achan[channel].modem_type = MODEM_AFSK;
p_audio_config->achan[channel].mark_freq = DEFAULT_MARK_FREQ; /* -m option */
p_audio_config->achan[channel].space_freq = DEFAULT_SPACE_FREQ; /* -s option */
p_audio_config->achan[channel].baud = DEFAULT_BAUD; /* -b option */
/* None. Will set default later based on other factors. */
strcpy (p_audio_config->achan[channel].profiles, "");
p_audio_config->achan[channel].num_freq = 1;
p_audio_config->achan[channel].offset = 0;
p_audio_config->achan[channel].fix_bits = DEFAULT_FIX_BITS;
p_audio_config->achan[channel].sanity_test = SANITY_APRS;
p_audio_config->achan[channel].passall = 0;
for (ot = 0; ot < NUM_OCTYPES; ot++) {
p_audio_config->achan[channel].octrl[ot].ptt_method = PTT_METHOD_NONE;
strcpy (p_audio_config->achan[channel].octrl[ot].ptt_device, "");
p_audio_config->achan[channel].octrl[ot].ptt_line = PTT_LINE_NONE;
p_audio_config->achan[channel].octrl[ot].ptt_line2 = PTT_LINE_NONE;
p_audio_config->achan[channel].octrl[ot].ptt_gpio = 0;
p_audio_config->achan[channel].octrl[ot].ptt_lpt_bit = 0;
p_audio_config->achan[channel].octrl[ot].ptt_invert = 0;
p_audio_config->achan[channel].octrl[ot].ptt_invert2 = 0;
}
p_audio_config->achan[channel].dwait = DEFAULT_DWAIT;
p_audio_config->achan[channel].slottime = DEFAULT_SLOTTIME;
p_audio_config->achan[channel].persist = DEFAULT_PERSIST;
p_audio_config->achan[channel].txdelay = DEFAULT_TXDELAY;
p_audio_config->achan[channel].txtail = DEFAULT_TXTAIL;
}
/* First channel should always be valid. */
/* If there is no ADEVICE, it uses default device in mono. */
p_audio_config->achan[0].valid = 1;
memset (p_digi_config, 0, sizeof(struct digi_config_s));
//p_digi_config->num_chans = p_audio_config->adev[0].num_channels; // TODO: rethink for > 2 case.
p_digi_config->dedupe_time = DEFAULT_DEDUPE;
memset (p_tt_config, 0, sizeof(struct tt_config_s));
p_tt_config->gateway_enabled = 0;
p_tt_config->ttloc_size = 2; /* Start with at least 2. */
/* When full, it will be increased by 50 %. */
p_tt_config->ttloc_ptr = malloc (sizeof(struct ttloc_s) * p_tt_config->ttloc_size);
p_tt_config->ttloc_len = 0;
/* Retention time and decay algorithm from 13 Feb 13 version of */
/* http://www.aprs.org/aprstt/aprstt-coding24.txt */
p_tt_config->retain_time = 80 * 60;
p_tt_config->num_xmits = 7;
assert (p_tt_config->num_xmits <= TT_MAX_XMITS);
p_tt_config->xmit_delay[0] = 3; /* Before initial transmission. */
p_tt_config->xmit_delay[1] = 16;
p_tt_config->xmit_delay[2] = 32;
p_tt_config->xmit_delay[3] = 64;
p_tt_config->xmit_delay[4] = 2 * 60;
p_tt_config->xmit_delay[5] = 4 * 60;
p_tt_config->xmit_delay[6] = 8 * 60;
memset (p_misc_config, 0, sizeof(struct misc_config_s));
p_misc_config->agwpe_port = DEFAULT_AGWPE_PORT;
p_misc_config->kiss_port = DEFAULT_KISS_PORT;
p_misc_config->enable_kiss_pt = 0; /* -p option */
/* Defaults from http://info.aprs.net/index.php?title=SmartBeaconing */
p_misc_config->sb_configured = 0; /* TRUE if SmartBeaconing is configured. */
p_misc_config->sb_fast_speed = 60; /* MPH */
p_misc_config->sb_fast_rate = 180; /* seconds */
p_misc_config->sb_slow_speed = 5; /* MPH */
p_misc_config->sb_slow_rate = 1800; /* seconds */
p_misc_config->sb_turn_time = 15; /* seconds */
p_misc_config->sb_turn_angle = 30; /* degrees */
p_misc_config->sb_turn_slope = 255; /* degrees * MPH */
memset (p_igate_config, 0, sizeof(struct igate_config_s));
p_igate_config->t2_server_port = DEFAULT_IGATE_PORT;
p_igate_config->tx_chan = -1; /* IS->RF not enabled */
p_igate_config->tx_limit_1 = 6;
p_igate_config->tx_limit_5 = 20;
/* People find this confusing. */
/* Ideally we'd like to figure out if com0com is installed */
/* and automatically enable this. */
//strcpy (p_misc_config->nullmodem, DEFAULT_NULLMODEM);
strcpy (p_misc_config->nullmodem, "");
strcpy (p_misc_config->nmea_port, "");
strcpy (p_misc_config->logdir, "");
/*
* Try to extract options from a file.
*
* Windows: File must be in current working directory.
*
* Linux: Search current directory then home directory.
*/
channel = 0;
adevice = 0;
fp = fopen (fname, "r");
#ifndef __WIN32__
if (fp == NULL && strcmp(fname, "direwolf.conf") == 0) {
/* Failed to open the default location. Try home dir. */
char *p;
p = getenv("HOME");
if (p != NULL) {
strcpy (stuff, p);
strcat (stuff, "/direwolf.conf");
fp = fopen (stuff, "r");
}
}
#endif
if (fp == NULL) {
// TODO: not exactly right for all situations.
text_color_set(DW_COLOR_ERROR);
dw_printf ("ERROR - Could not open config file %s\n", fname);
dw_printf ("Try using -c command line option for alternate location.\n");
return;
}
line = 0;
while (fgets(stuff, sizeof(stuff), fp) != NULL) {
char *t;
line++;
t = strtok (stuff, " ,\t\n\r");
if (t == NULL) {
continue;
}
if (*t == '#' || *t == '*') {
continue;
}
/*
* ==================== Audio device parameters ====================
*/
/*
* ADEVICE[n] - Name of input sound device, and optionally output, if different.
*/
/* Note that ALSA name can contain comma such as hw:1,0 */
if (strncasecmp(t, "ADEVICE", 7) == 0) {
adevice = 0;
if (isdigit(t[7])) {
adevice = t[7] - '0';
}
if (adevice < 0 || adevice >= MAX_ADEVS) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Config file: Device number %d out of range for ADEVICE command on line %d.\n", adevice, line);
adevice = 0;
continue;
}
t = strtok (NULL, " \t\n\r");
if (t == NULL) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Config file: Missing name of audio device for ADEVICE command on line %d.\n", line);
continue;
}
p_audio_config->adev[adevice].defined = 1;
/* First channel of device is valid. */
p_audio_config->achan[ADEVFIRSTCHAN(adevice)].valid = 1;
strncpy (p_audio_config->adev[adevice].adevice_in, t, sizeof(p_audio_config->adev[adevice].adevice_in)-1);
strncpy (p_audio_config->adev[adevice].adevice_out, t, sizeof(p_audio_config->adev[adevice].adevice_out)-1);
t = strtok (NULL, " \t\n\r");
if (t != NULL) {
strncpy (p_audio_config->adev[adevice].adevice_out, t, sizeof(p_audio_config->adev[adevice].adevice_out)-1);
}
}
/*
* ARATE - Audio samples per second, 11025, 22050, 44100, etc.
*/
else if (strcasecmp(t, "ARATE") == 0) {
int n;
t = strtok (NULL, " ,\t\n\r");
if (t == NULL) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Missing audio sample rate for ARATE command.\n", line);
continue;
}
n = atoi(t);
if (n >= MIN_SAMPLES_PER_SEC && n <= MAX_SAMPLES_PER_SEC) {
p_audio_config->adev[adevice].samples_per_sec = n;
}
else {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Use a more reasonable audio sample rate in range of %d - %d.\n",
line, MIN_SAMPLES_PER_SEC, MAX_SAMPLES_PER_SEC);
}
}
/*
* ACHANNELS - Number of audio channels for current device: 1 or 2
*/
else if (strcasecmp(t, "ACHANNELS") == 0) {
int n;
t = strtok (NULL, " ,\t\n\r");
if (t == NULL) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Missing number of audio channels for ACHANNELS command.\n", line);
continue;
}
n = atoi(t);
if (n ==1 || n == 2) {
p_audio_config->adev[adevice].num_channels = n;
/* Set valid channels depending on mono or stereo. */
p_audio_config->achan[ADEVFIRSTCHAN(adevice)].valid = 1;
if (n == 2) {
p_audio_config->achan[ADEVFIRSTCHAN(adevice) + 1].valid = 1;
}
}
else {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Number of audio channels must be 1 or 2.\n", line);
}
}
/*
* ==================== Radio channel parameters ====================
*/
/*
* CHANNEL - Set channel for following commands.
*/
else if (strcasecmp(t, "CHANNEL") == 0) {
int n;
t = strtok (NULL, " ,\t\n\r");
if (t == NULL) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Missing channel number for CHANNEL command.\n", line);
continue;
}
n = atoi(t);
if (n >= 0 && n < MAX_CHANS) {
channel = n;
if ( ! p_audio_config->achan[n].valid) {
if ( ! p_audio_config->adev[ACHAN2ADEV(n)].defined) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Channel number %d is not valid because audio device %d is not defined.\n",
line, n, ACHAN2ADEV(n));
}
else {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Channel number %d is not valid because audio device %d is not in stereo.\n",
line, n, ACHAN2ADEV(n));
}
}
}
else {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Channel number must in range of 0 to %d.\n", line, MAX_CHANS-1);
}
}
/*
* MYCALL station
*/
else if (strcasecmp(t, "mycall") == 0) {
t = strtok (NULL, " ,\t\n\r");
if (t == NULL) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Config file: Missing value for MYCALL command on line %d.\n", line);
continue;
}
else {
// Definitely set for current channel.
// Set for other channels which have not been set yet.
int c;
for (c = 0; c < MAX_CHANS; c++) {
if (c == channel ||
strlen(p_audio_config->achan[c].mycall) == 0 ||
strcasecmp(p_audio_config->achan[c].mycall, "NOCALL") == 0 ||
strcasecmp(p_audio_config->achan[c].mycall, "N0CALL") == 0) {
char *p;
strncpy (p_audio_config->achan[c].mycall, t, sizeof(p_audio_config->achan[c].mycall)-1);
for (p = p_audio_config->achan[c].mycall; *p != '\0'; p++) {
if (islower(*p)) {
*p = toupper(*p); /* silently force upper case. */
}
}
// TODO: additional checks if valid
}
}
}
}
/*
* MODEM - Set modem properties for current channel.
*
*
* Old style:
* MODEM baud [ mark space [A][B][C][+] [ num-decoders spacing ] ]
*
* New style, version 1.2:
* MODEM speed [ option ] ...
*
* Options:
* mark:space - AFSK tones. Defaults based on speed.
* num@offset - Multiple decoders on different frequencies.
*
*/
else if (strcasecmp(t, "MODEM") == 0) {
int n;
t = strtok (NULL, " ,\t\n\r");
if (t == NULL) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Missing data transmission speed for MODEM command.\n", line);
continue;
}
n = atoi(t);
if (n >= 100 && n <= 10000) {
p_audio_config->achan[channel].baud = n;
if (n != 300 && n != 1200 && n != 9600) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Warning: Non-standard baud rate. Are you sure?\n", line);
}
}
else {
p_audio_config->achan[channel].baud = DEFAULT_BAUD;
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Unreasonable baud rate. Using %d.\n",
line, p_audio_config->achan[channel].baud);
}
/* Set defaults based on speed. */
/* Should be same as -B command line option in direwolf.c. */
if (p_audio_config->achan[channel].baud < 600) {
p_audio_config->achan[channel].modem_type = MODEM_AFSK;
p_audio_config->achan[channel].mark_freq = 1600;
p_audio_config->achan[channel].space_freq = 1800;
}
else if (p_audio_config->achan[channel].baud > 2400) {
p_audio_config->achan[channel].modem_type = MODEM_SCRAMBLE;
p_audio_config->achan[channel].mark_freq = 0;
p_audio_config->achan[channel].space_freq = 0;
}
else {
p_audio_config->achan[channel].modem_type = MODEM_AFSK;
p_audio_config->achan[channel].mark_freq = 1200;
p_audio_config->achan[channel].space_freq = 2200;
}
/* Get mark frequency. */
t = strtok (NULL, " ,\t\n\r");
if (t == NULL) {
/* all done. */
continue;
}
if (alldigits(t)) {
/* old style */
n = atoi(t);
/* Originally the upper limit was 3000. */
/* Version 1.0 increased to 5000 because someone */
/* wanted to use 2400/4800 Hz AFSK. */
/* Of course the MIC and SPKR connections won't */
/* have enough bandwidth so radios must be modified. */
if (n >= 300 && n <= 5000) {
p_audio_config->achan[channel].mark_freq = n;
}
else {
p_audio_config->achan[channel].mark_freq = DEFAULT_MARK_FREQ;
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Unreasonable mark tone frequency. Using %d.\n",
line, p_audio_config->achan[channel].mark_freq);
}
/* Get space frequency */
t = strtok (NULL, " ,\t\n\r");
if (t == NULL) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Missing tone frequency for space.\n", line);
continue;
}
n = atoi(t);
if (n >= 300 && n <= 5000) {
p_audio_config->achan[channel].space_freq = n;
}
else {
p_audio_config->achan[channel].space_freq = DEFAULT_SPACE_FREQ;
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Unreasonable space tone frequency. Using %d.\n",
line, p_audio_config->achan[channel].space_freq);
}
/* Gently guide users toward new format. */
if (p_audio_config->achan[channel].baud == 1200 &&
p_audio_config->achan[channel].mark_freq == 1200 &&
p_audio_config->achan[channel].space_freq == 2200) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: The AFSK frequencies can be omitted when using the 1200 baud default 1200:2200.\n", line);
}
if (p_audio_config->achan[channel].baud == 300 &&
p_audio_config->achan[channel].mark_freq == 1600 &&
p_audio_config->achan[channel].space_freq == 1800) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: The AFSK frequencies can be omitted when using the 300 baud default 1600:1800.\n", line);
}
/* New feature in 0.9 - Optional filter profile(s). */
t = strtok (NULL, " ,\t\n\r");
if (t != NULL) {
/* Look for some combination of letter(s) and + */
if (isalpha(t[0]) || t[0] == '+') {
char *pc;
/* Here we only catch something other than letters and + mixed in. */
/* Later, we check for valid letters and no more than one letter if + specified. */
for (pc = t; *pc != '\0'; pc++) {
if ( ! isalpha(*pc) && ! *pc == '+') {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Demodulator type can only contain letters and + character.\n", line);
}
}
strncpy (p_audio_config->achan[channel].profiles, t, sizeof(p_audio_config->achan[channel].profiles));
t = strtok (NULL, " ,\t\n\r");
if (strlen(p_audio_config->achan[channel].profiles) > 1 && t != NULL) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Line %d: Can't combine multiple demodulator types and multiple frequencies.\n", line);